US20010025508A1 - Refrigerator - Google Patents
Refrigerator Download PDFInfo
- Publication number
- US20010025508A1 US20010025508A1 US09/809,000 US80900001A US2001025508A1 US 20010025508 A1 US20010025508 A1 US 20010025508A1 US 80900001 A US80900001 A US 80900001A US 2001025508 A1 US2001025508 A1 US 2001025508A1
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- United States
- Prior art keywords
- frame
- shelf
- timing belt
- refrigerator
- lever
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B57/00—Cabinets, racks or shelf units, characterised by features for adjusting shelves or partitions
- A47B57/30—Cabinets, racks or shelf units, characterised by features for adjusting shelves or partitions with means for adjusting the height of detachable shelf supports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D25/00—Charging, supporting, and discharging the articles to be cooled
- F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
- F25D2317/066—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air supply
- F25D2317/0664—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air supply from the side
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D25/00—Charging, supporting, and discharging the articles to be cooled
- F25D25/04—Charging, supporting, and discharging the articles to be cooled by conveyors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2500/00—Problems to be solved
- F25D2500/02—Geometry problems
Abstract
A shelf placing frame formed in a hollow shape and a timing belt arranged along its periphery utilizing the hollow part are prepared. A lever movable along the frame is fixedly connected to the timing belt so as to rotationally move the timing belt. A screw shape shaft fixedly provided with a gear disposed rotational moving line of the timing belt is provided in the frame and conjointly moved with the timing belt. A moving board having a screw threaded hole meshing with the screw shape shaft is fixed on an inner wall of a refrigerator so that the shelf placing frame is moved up and down in accordance with movement of the lever.
Description
- The present invention relates to a refrigerator having a shelf device which is provided inside the refrigerator and in which the height of a shelf can be adjusted to a free position.
- Generally, regarding a refrigerator, there is a need of a shelf device in which a shelf can be up/down adjusted in accordance with sizes of foods and/or containers held in the refrigerator. Conventionally, for example, there is one as shown in Japanese Patent No. 2752300 as this type of shelf device inside a refrigerator.
- FIG. 44 is a longitudinal section of a refrigerator having a conventional shelf device, FIG. 45 is a perspective view of the conventional shelf device, and FIG. 46 is a detail view of the conventional shelf device.
- In the drawings,1 is an inside of a refrigerator, 2 is a rack, 3 is a shelf support frame, 4 is a pinion gear, and 5 is a shelf main body having a shelf board 5 a (chain line portion) and a shelf frame 5 b. The shelf board 5 a is slidable in the A direction in FIG. 45 relatively to the shelf frame 5 b. Six (6) are gear shafts, 7 is a spring, and 8 is adjustment means.
- At the refrigerator inside1, there are provided the
shelf support frame 3 having therack 2, which constitutes a frame body of a longitudinal shape, the shelfmain body 5 having, which aid of a support member, thepinion gear 4 meshing with therack 2, thegear shaft 6 provided in the shelfmain body 5 via a Z-shaped steel member to pivotally support thepinion gear 4, thespring 7 which is tightly wound around the outer peripheral face of thegear shaft 6 and whose one end is fixed on thepinion gear 4, and the adjustment means 8 set to compress thespring 7. - In a state where the
pinion gear 4 of the shelfmain body 5 is meshed with therack 2 of theshelf support frame 3, thespring 7 is pulled in a direction to decrease its coil diameter by the self weight of the shelfmain body 5 and firmly wound around thegear shaft 6, so that thepinion gear 4 is locked to fix the shelfmain body 5 at a predetermined position. When the position of the shelfmain body 5 is changed, the winding fixing force between thespring 7 and thegear shaft 6 is released by pressing the adjustment means 8 (chain line portion 8), whereby the shelfmain body 5 can be freely adjusted in an up direction (B direction in FIG. 46) or a down direction (C direction in FIG. 46). - When the shelf
main body 5 is adjusted only in the up direction (the B direction in FIG. 46), the shelfmain body 5 is lifted up as it is in the up direction. - In the refrigerator having the conventional shelf device as described above, since the adjustment means8 are provided in right and left two positions, they have to be operated by both hands at the same time to perform an up/down adjustment of the position of the shelf
main body 5. Therefore, the operation to keep thebody 5 becomes difficult and the operation with paying more attention is annoying, since either side of the adjustment means 8 is apt to move ahead. - Further, since the each adjustment means8 supports the shelf
main body 5 only at one position on each of left and right sides, a play in front-rear direction is apt to be generated due to unevenness of assembly, so that the shelfmain body 5 is not stably fitted. - When the adjustment means8 are operated to release the lock, there is a fear that the shelf
main body 5 falls instantaneously at a stroke due to its self weight, so that there is a problem of insecurity. - Further, it is a difficult word to move the shelf
main body 5 upward/downward while operating the adjustment means 8, considering the load amount of the shelfmain body 5 on which food is placed. - When a conventional shelf device with a complex structure is provided, a part sometimes becomes rattled or floated, resulting in a poor operability.
- There is a fear that a part is slipped off due to unevenness in sizes.
- The resistance increases to the moving operation, thereby deteriorating the operability.
- The design is not excellent.
- The operability is poor.
- Cool air is obstructed, so that cool air may not flow to the forward side if air volume is not enough, resulting in low cooling efficiency.
- When the conventional shelf device with the complex structure is provided, a brake phenomenon is generated, and a smooth movement cannot be obtained.
- A tooth skip of a belt (position mismatch between teeth of a gear and teeth of a belt) is apt to occur.
- There is an occasion that the flow of cool wind is prevented depending on the way of putting a load, such as food on the shelf, so that uniform cooling is not necessarily achieved.
- Since the knob shape of a lever is a simple square block shape, the touch in pinching the knob is uncomfortable, and it is difficult to concentrate one's force at the knob.
- The present invention was developed in order to solve the problems described above and is to provide a refrigerator having a shelf device in which a position of a shelf can be reasonably adjusted as it is, by a small force and a single hand even if food is placed on the shelf, regardless of differences in the load amount of the food.
- The present invention is to obtain a refrigerator having a high reliability and an excellent design and is further to provide a refrigerator of energy saving type in which the flow of the cool air inside the refrigerator is improved so as to improve the cooling efficiency.
- The present invention is to provide a refrigerator in which a brake phenomenon due to a load, such as food, placed on a shelf is an extremely small so that the operation of the lever is improved, a trouble can be prevented at a time to lift up a shelf when the lever is most loaded in operation, the strength of a tray is increased, the entire room of the refrigerator is uniformly cooled down, and the lever can be easily pinched.
- The refrigerator according to the first aspect of the present invention is provided with a shelf device comprising a frame for placing a shelf or the like on it, arranged inside the refrigerator, a timing belt provided inside the frame, a lever provided on the timing belt, and a means for moving the frame in an up/down direction in operative connection with the timing belt rotationally moved by moving the lever. Thus, the shelf can be moved up/down while keeping stored stuff, such as food on it, even by a small operating physical force.
- The refrigerator according to the second aspect of the present invention is the one according to the first aspect in which a corner portion of the frame is extended to provide an extended portion, the means for moving the frame in the up/down direction is placed inside the extended portion, and a groove portion in which the extended portion is movably received is provided inside the refrigerator. Thus, a food storing space inside the refrigerator can be used effectively.
- The refrigerator according to the third aspect of the present invention is the one according to the first aspect in which the shelf device is employed for a member for closing a ceiling part of a compartment provided inside the refrigerator. Due to this, the volume of the compartment is made variable so that it can be adjusted to a space chosen by a user.
- The refrigerator according to the fourth aspect of the present invention is the one according to the first aspect in which the shelf device is employed for a bottom of a door pocket provided in a door of the refrigerator. Due to this, its height can be adjusted to a height chosen by a user, corresponding to stuff stored in the door pocket.
- The refrigerator according to the fifth aspect of the present invention in the one according to the first aspect, further comprising an open/close door to close a front face of the refrigerator and a partition wall to partition the inside of the refrigerator plurally, wherein the partition wall is movable in the up/down direction. Thus, the refrigerator can flexibly deal with various stored stuff in accordance with the size thereof.
- The refrigerator according to the sixth aspect of the present invention is the one according to the first aspect in which the frame is provided with a cool air intake for taking cool air in from a cool air supply duct provided between an inner case and an outer case of the refrigerator and a cool air outlet for sending out the cool air to the inside of the refrigerator. Thus, a uniform temperature distribution inside the refrigerator can be obtained by a simple work to provide holes in the frame.
- The refrigerator according to the seventh aspect of the present invention is the one according to the first aspect, in which the shelf device further comprises a holding means and a fixing means; the frame is provided with a screw shape shaft pivotally supported in an up/down direction; the moving means is provided with a meshing portion for meshing with the screw shape shaft, and a flange portion having a locking portion at one end thereof; the holding means is provided with an engaging portion for engaging with the locking portion at the time when the moving means is placed on the holding means from the above, and an insert piece extending from a placing face when the moving means is placed; and the fixing means is provided with a pinching portion to insert and fix the insert piece and an abutting portion arranged on an open side of the pinching portion to stop the locking portion of the moving means abutting against the abutting portion; and the fixing means is fixed to an inner wall of the refrigerator so that the moving means is fixedly held on the inner wall with aid of the holding means to make the frame movable in the up/down direction. Thus, at the time of a manual operation of the lever, the frame connected to the moving means hardly has horizontal play, thereby improving the operability. Further, the holding means is integrally engaged with the moving means and a margin to insert in the fixing means can be fully secured.
- The refrigerator according to the eighth aspect of the present invention is the one according to the seventh aspect in which the locking portion of the moving means extends in an axial direction of the screw shape shaft from the flange portion in an axial direction, and the engaging portion of the holding means is arranged approximately perpendicularly to the placing face. Thus, even if food is unevenly placed on the shelf, the moving means is not lifted away from the holding means at the time of a lever operation, thereby producing an advantageous effect that the operability is improved.
- The refrigerator according to the ninth aspect of the present invention is the one according to the seventh aspect in which the insert piece of the holding means is arranged approximately horizontally or in a diagonal direction to the placing face, and the pinching portion side of the fixing means is embedded in the inner wall of the refrigerator. Due to this, the space inside the refrigerator can be effectively utilized.
- The refrigerator according to the tenth aspect of the present invention is the one according to the seventh aspect in which a protrusion or a hole portion is provided in the flange portion of the moving means and a hole portion or a protrusion is provided in the holding means to engage with the protrusion or hole portion of the moving means. Due to this, there is no case in which when the lever is slid the moving means is shifted beyond the holding means in the sliding direction to bring the frame into contact with the inner side wall of the refrigerator, so that the operability of the lever and the convenience to move the shelf become excellent.
- The refrigerator according to the eleventh aspect of the present invention is the one according to the seventh aspect in which a force of a sliding movement of the lever provided on the timing belt is transmitted via the timing belt to a gear which is fixedly and coaxially provided at one end of the screw shape shaft and engaged with the timing belt, so that the screw shape shaft is rotated. That makes the refrigerator compact.
- The refrigerator according to the twelfth aspect of the present invention is the one according to the eleventh aspect in which the timing belt is arranged in an inside peripheral part of the frame, and the screw shape shafts engaged with the timing belt to rotate are provided in at least two corners of the frame. Due to this, the timing belt can rotationally move more stably.
- The refrigerator according to the thirteenth aspect of the present invention is the one according to the seventh aspect in which a screw pitch of the screw shape shaft is set at 9 mm or less, and a lead angle of the screw shape shaft is set for 15° degree or less. Thus, considering a food weight loaded on a shelf of a size employed in a general household refrigerator, the operating physical force is appropriately reduced, in manual operation of the lever by a user.
- The refrigerator according to the fourteenth aspect of the present invention is the one according to the seventh aspect in which a protrusion is provided on an outer wall of the meshing portion of the moving means, and a groove is provided in the frame correspondingly to the protrusion, on an inner wall of a housing portion for the screw shape shaft, so that the groove guides the protrusion as a track. Thus, rotation of the moving means can be prevented regardless of the shape of the frame, so that a refrigerator with an excellent design can be provided.
- The refrigerator according to the fifteenth aspect of the present invention is the one according to the first aspect further comprising a connecting duct which is provided in the frame so as to be disposed near an outlet of a cool air supply duct provided between an inner wall and an outer wall of the refrigerator, to conduct cool air formed from the outlet of the cool air supply duct to the front inside of the frame. Thus, cool air can flow to the front with a small air volume resulting in improved cooling efficiency and energy saving.
- The refrigerator according to the sixteenth aspect of the present invention is the one according to the first aspect in which the shelf device further comprises a timing belt coupling means consisting of a socket and a slider portion which is slidable to the socket and loaded with a spring toward the socket, and the lever and one end of the timing belt are connected to the socket and the other end of the timing belt is connected to the slider portion so that the frame is moved up and down conjointly with sliding of the lever via timing belt rotationally moved. Thus, slack of the belt is prevented, so that a refrigerator with a high reliability can be obtained.
- The refrigerator according to the seventeenth aspect of the present invention is the one according to the sixteenth aspect in which the lever is provided with an insert piece formed by extending a root of the lever, and the insert piece is inserted into a slit portion provided in a front part lower face of the frame and is engaged with the socket of the timing belt coupling means for connecting the timing belt so that the lever and the timing belt are connected to each other. Thus, the timing belt does not show from the slit of the frame when the frame is seen from the front of the refrigerator, so that a refrigerator with an excellent design can be obtained.
- The refrigerator according to the eighteenth aspect of the present invention is the one according to the sixteenth aspect in which a frame reinforcing plate is arranged along a track of the lever moving along the frame. Thus, even when a food weight is excessively loaded, flexure of the frame can be minimized, so that a rectilinear motion in the lever operation can be secured with an excellent operability.
- The refrigerator according to the nineteenth aspect of the present invention is the one according to the sixteenth aspect, having the shelf device in which a front part of the frame is a metal frame, and the timing belt is arranged inside the metal frame. Due to this, deformation of the frame due to a food weight load is small, and the operability of the lever can be maintained excellently.
- The refrigerator according to the twentieth aspect of the present invention is the one according to the first aspect in which the shelf device comprises a removable shelf placed on the frame, and the removable shelf is provided with a lower front part having a U-shaped rib opening forward so as to be engaged with a flange portion formed at a front side inner edge of the frame, and a L-shaped rear part so as to cover a rear part of the frame. Thus, the shelf and the frame can be integrally engaged as one body, whereby the strength of the entire shelf can be improved.
- The refrigerator according to the twenty-first aspect of the present invention is the one according to the eleventh aspect in which the gear fixedly provided in the screw shape shaft is provided with a plurality of rotatable balls which are embedded inside the gear and an upper supporting shaft, which is rotatably engaged with the gear with intervention of the rotatable balls, the frame is provided with a bearing portion having a hole, and the upper supporting shaft is set to the bearing of the frame with its upper end inserted in the hole, so that the gear can rotate. Due to this, the operation of the lever becomes smooth.
- The refrigerator according to the twenty-second aspect of the present invention is the one according to the twenty-first aspect in which the upper face of the balls is protruded from the upper face of the gear, and the gear rotates while the lower face of the bearing hole of the frame gets in contact with the balls. Thus, even when the upper face portion of the gear is pressed by the load, such as food, placed on the shelf, a brake phenomenon against to the rotation of the gear is extremely small, whereby the operating physical force of the lever is improved.
- The refrigerator according to the twenty-third aspect of the present invention is the one according to the sixteenth aspect in which the timing belt is attached to the timing belt coupling means in such a manner that in a case where the lever is slid in the right direction in its operation to lift up the shelf, one end of the timing belt is fixed to the socket of the timing belt coupling means on the left side while the other end of the timing belt is connected to the slider portion of the timing belt coupling means on the right side, and in a case where the lever is slid in the left direction in its operation to lift up the shelf, one end of the timing belt is fixed to the socket the timing belt coupling means on the right side while the other end of the timing belt is connected to the slider portion of the timing belt coupling means on the left side. Thus, since the slack of the timing belt can be absorbed by the resiliency of the spring in the lifting-up process where the lever is most loaded in operation, so that a tooth skip of the belt (position mismatch between teeth of the gear and teeth of the belt) can be prevented.
- The refrigerator according to the twenty-fourth aspect of the present invention is the one according to the first aspect in which the shelf provided on the frame for placing the shelf on it is made of a resin, and a metal member is placed on the upper face of the shelf. Due to this, the strength of the shelf can be increased. The refrigerator according to the twenty-fifth aspect of the present invention is the one according to the first aspect in which the shelf provided on the frame for placing the shelf on it is made of a metal. Due to this, the strength of the shelf can be increased.
- The refrigerator according to the twenty-sixth aspect of the present invention is the one according to the twenty-fourth or twenty-fifth aspect in which part of cool air led to the inside of the frame for placing the shelf blows against a metal member or the metal shelf provided on the frame. Due to this, the entire shelf is uniformly cooled down so that the temperature distribution is improved. Further, the space between shelves is also cooled down uniformly, so that the distribution of the entire room is improved.
- The refrigerator according to the twenty-seventh aspect of the present invention is the one according to the first aspect in which a knob shape of the lever is formed into a recess dented toward the inner side, corresponding to an abdominal portion of a finger. Due to this, the lever can be easily pinched so that force can be applied.
- FIG. 1 is a perspective view of a shelf device according to the first embodiment of the present invention.
- FIG. 2 is a sectional view of the shelf device according to the first embodiment of the present invention.
- FIG. 3 is an installation view of the shelf device according to the first embodiment of the present invention.
- FIG. 4 is a perspective view of the shelf device according to the first embodiment of the present invention.
- FIG. 5 is a sectional view of an exclusive temperature range compartment part according to the first embodiment of the present invention.
- FIG. 6 is a sectional view of a door pocket part according to the first embodiment of the present invention.
- FIG. 7 is an assembly perspective view of a shelf device according to the second embodiment of the present invention.
- FIG. 8 is a detailed plan view of a moving leg and a holding member according to the second embodiment of the present invention.
- FIG. 9 is a detailed section of the moving leg and the holding member according to the second embodiment of the present invention.
- FIG. 10 is a perspective view of the moving leg according to the second embodiment of the present invention.
- FIG. 11 is a perspective view of the holding member according to the second embodiment of the present invention.
- FIG. 12 is an elevational perspective view of a refrigerator according to the second embodiment of the present invention.
- FIG. 13 is an elevational perspective view of a refrigerator according to the second embodiment of the present invention.
- FIG. 14 is an elevational perspective view of a refrigerator according to the second embodiment of the present invention.
- FIG. 15 is an elevational perspective view of a refrigerator according to the second embodiment of the present invention.
- FIG. 16 is a perspective view of a refrigerator according to the second embodiment of the present invention.
- FIG. 17 is a perspective view of a refrigerator according to the second embodiment of the present invention.
- FIG. 18 is a perspective view of a refrigerator according to the second embodiment of the present invention.
- FIG. 19 is a perspective view of a refrigerator according to the second embodiment of the present invention.
- FIG. 20 is a perspective view of a refrigerator according to the second embodiment of the present invention.
- FIG. 21 is a perspective view of a screw shape shaft part and the vicinity thereof according to the second embodiment of the present invention.
- FIG. 22 is a perspective view of a screw shape shaft part and the vicinity thereof according to the second embodiment of the present invention.
- FIG. 23 is a perspective view of a screw shape shaft part and the vicinity thereof according to the second embodiment of the present invention.
- FIG. 24 is a perspective view of a screw shape shaft part and the vicinity thereof according to the second embodiment of the present invention.
- FIG. 25 is a perspective view of a screw shape shaft part and the vicinity thereof according to the second embodiment of the present invention.
- FIG. 26 is a perspective view of a screw shape shaft part and the vicinity thereof according to the second embodiment of the present invention.
- FIG. 27 is a perspective view of a screw shape shaft part and the vicinity thereof according to the second embodiment of the present invention.
- FIG. 28 is a perspective view of a screw shape shaft part and the vicinity thereof according to the second embodiment of the present invention.
- FIG. 29 is a perspective view of a screw shape shaft part and the vicinity thereof according to the second embodiment of the present invention.
- FIG. 30 is a detailed plan section in which the lever is installed according to the second embodiment of the present invention.
- FIG. 31 is a detailed perspective view in which the lever and the timing belt are installed according to the second embodiment of the present invention.
- FIG. 32 is a sectional view in which a removable shelf is installed according to the second embodiment of the present invention.
- FIG. 33 is a view in which the screw shape shaft and the moving leg are combined according to the second embodiment of the present invention.
- FIG. 34 is a plan section showing an air course structure according to the second embodiment of the present invention.
- FIG. 35 is an assembly perspective view of a shelf device according to the third embodiment of the present invention.
- FIG. 36 is a detailed section of an inner part of a gear according to the third embodiment of the present invention.
- FIG. 37 is a detailed section of the inner part of a gear according to the third embodiment of the present invention.
- FIG. 38 is a detail perspective view in which a lever and a timing belt are installed according to the third embodiment of the present invention.
- FIG. 39 is a detailed plan section in which the lever is installed according to the third embodiment of the present invention.
- FIG. 40 is a sectional view of the installation of a removable shelf according to the third embodiment of the present invention.
- FIG. 41 is a sectional view of a cooling method for a resin shelf according to the third embodiment of the present invention.
- FIG. 42 is a sectional view of a cooling method for a metal shelf according to the third embodiment of the present invention.
- FIG. 43 is a perspective view showing a knob shape of the lever according to the third embodiment of the present invention.
- FIG. 44 is a side view of a refrigerator having a conventional shelf device.
- FIG. 45 is a perspective view of the conventional shelf device.
- FIG. 46 is a side view of the conventional shelf device.
- First Embodiment
- One embodiment of the present invention will be explained below referring to drawings.
- FIG. 1 is a perspective view of a shelf device, FIG. 2 is a main part section of the shelf device, and FIG. 3 is a installation view of the shelf device in a refrigerator. In the drawings,1 is a frame for placing a shelf on it, 1 c, 1 d are bearing portions provided in a leg portion 1 i, 1 i is a leg portion of the
shelf placing frame 1, 1 j is a cool air intake provided in theshelf placing frame timing belt screw shape shaft gear frame frame frame - The
frame 1 is a frame for placing a shelf on it, constituted by a hollow shaped frame having ahollow part 10. Thetiming belt 2 arranged along the outer periphery of the frame is mounted in the frame utilizing thehollow part 10. Thelever 3 is fixedly connected with thetiming belt 2 by means of a screw 43 and is arranged so as to move along one side of theshelf placing frame 1. Consequently, thetiming belt 2 is rotationally moved by sliding thelever 3. Thegears 6 meshing with the rack shape portion 2 a of thetiming belt 2 to be rotated are arranged on the rotationally moving line of thetiming belt 2 and in the respective corners of theshelf placing frame 1. Ascrew shape shaft 4 is integrally formed with thegear 6 coaxially, with intervention of theflat seat 35 having a larger diameter than that of thegear 6. Although theflat seat 35 prevents shift of thetiming belt 2, theflat seat 35 is not always necessary. - The
screw shape shaft 4 rotates according to the rotation of thegear 6 by means of thetiming belt 2. Sixteen (16) is the moving board having a screw tappedhole 16 a in which thescrew shape shaft 4 is screwed so that the moving board moves upward/downward due to feeding by the screw at the time when thescrew shape shaft 4 rotates. The leg portions 1 i are formed in the each corner (four portions) of theshelf placing frame 1. Thesmall shaft portions gear 6 and thescrew shape shaft 4 are pivotally supported on the bearingportions gear 6 and theshaft 4. Although it is explained here that the leg portions 1 i are provided in the four corners, they may be provided in two corners so as to be opposed to each other in the left/right direction, thereby generating stability. In the case where there is no corner in theshelf placing frame 1, for example, as in the case where theshelf placing frame 1 has a circle shape, the leg portions ii may be provided at opposite positions to each other, such as the right and the left or the forward and the rearward. - Next, the case where the shelf device is installed in a refrigerator inside50 will be shown.
- Thirty-six (36) is the shelf receiving portion fixed at a predetermined position of the
side wall 7 of the refrigerator inside 50 by means of thescrew 37, and is arranged so that the movingboard 16 in which thescrew shape shaft 4 in the frame is screwed is placed oppositely. The movingboard 16 set in theshelf placing frame 1 is fixed by a self weight when being placed on theshelf receiving portion 36, so that theframe 1 itself, not theboard 16, actually moves up and down. - That is, by sliding the
lever 3, thetiming belt 2, thegear 6, thescrew shape shaft 4, and the movingboard 16 move in response thereto, and theshelf placing frame 1 moves up/down by fixing the movingboard 16 on theside wall 7 inside the refrigerator. - In the above, although the
shelf 20 is removably placed on theshelf placing frame 1, theshelf placing frame 1 and theshelf 20 may be fixed to be made one body, or theshelf placing frame 1 and theshelf 20 may be integrally molded from the beginning as a shelf device having a structure of ashelf 20 having theshelf placing frame 1 in its lower part. - Although the one in which the shelf device is employed in a refrigerator is shown in the present embodiment, the shelf device can be applied to all various types of storing implements, such as a small showcase, a business showcase, a piece of furniture, or the like.
- In FIG. 3, cool air is guided through the cool air supply duct46 provided in the rear part of the refrigerator and between the
inner board 25 and theouter board 26. Utilizing thehollow part 10 of theshelf placing frame 1, air courses are so formed that part of the cool air is taken from theair hole 45 of the duct into the cool air intake 1 j of theshelf placing frame 1 to guide the cool air to theair outlet 38 provided in a side face of theshelf placing frame 1 and theair outlet 39 provided in a front face and a side face of the leg portion 1 i of theshelf placing frame 1. Theair hole 45 and the cool air intake 1 j are formed so as to be opposed to each other when the movingboard 16 is placed on theshelf receiving portion 36. Here, although a structure in which the cool air supply duct 46 is provided in the rear part of the refrigerator is shown, the cool air intake 1 j may be provided in a side face of theshelf placing frame 1 in the case where the duct 46 is provided in a side part. - With the above, since the shelf device is constructed so that cool air blows out even to the front portion inside the refrigerator, a temperature distribution inside the refrigerator can be uniformed.
- Further, cool air can be supplied to desired parts through a simple work to provide holes such as the
air outlets shelf placing flame 1. - While stored stuff, such as food, is placed on the shelf, the shelf can be moved up/down only by horizontally sliding the lever along the front face of the shelf placing frame, so that operation can be executed only by one hand. Since the whole width of the shelf can be fully used as a lever operation range, the screw shape shaft can be rotated to a considerable extent, so that the shelf can be moved up/down even by a small operating physical force.
- Since the shelf placing frame moves up/down by the movement of the moving board engaged with the screw shape shaft, the shelf does not move only by weighing a load on the shelf. Therefore, it is possible to provide a shelf device, in which a lock release mechanism is unnecessary, having excellent operability and safety, and constituting of a smaller number of parts. However, a lock mechanism may be provided in the lever part so as to improve the safety at the time the shelf is heavily loaded.
- The room volume can be changed by partitioning the room with a variable partition wall.
- The food storing space inside the refrigerator can be used effectively by making the position of the
gear 6 and thescrew shape shaft 4 extend from the corner part of theshelf placing frame 1 and arranging it along a groove part 7 a provided in theside wall 7 of the refrigerator so as to arrange thetiming belt 2 to engage with thegear 6 via a rotatable roller 44 as shown in FIG. 4. - An example in which the structure of the shelf device shown in the above embodiment is employed for a ceiling wall of a partitioned space for special use will be shown.
- As shown in FIG. 5, for example, a ceiling wall42 which holds an open/close door for a partitioned space for special use, such as a chilled compartment or a new freezing temperature range compartment 41 having a special temperature range for the special use, in the inside of the refrigerator, is moved with a lever or the like (not shown) by providing the timing belt (not shown), the screw shape shaft (not shown), and the moving board (not shown), so that the volume of the partitioned space (the chilled compartment or the freezing temperature range compartment 41) can be changed to adjust the space as a user wants. In the drawing, the partitioned space can be maintained within a special temperature range, by securing a lapping distance of the open/close door over a case more than the moving range of the ceiling wall.
- Such a volume adjustment can be performed not only by means of a horizontal partition wall to partition a room into an upper and a lower portions as the ceiling partition wall42 but also by means of a longitudinal partition wall which is movable in a right/left direction, so that the present shelf device is the most effective means, for example, for a chilled compartment or a new freezing temperature range compartment in a cold room. Further, although the volume adjustment can be performed, of course, according to preference of a consumer user, products having different volumes of the partitioned space for special use can be also manufactured in one model, so that the present embodiment leads to an improved productivity from point of view of factory production.
- An example in which the structure of the shelf device shown in the above embodiment is employed for a door pocket provided in a refrigerator door will be shown.
- As shown in FIG. 6, a position of the
door pocket 40 can be changed up and down by moving the door pocket equipped with thetiming belt 2, thescrew shape shaft 4, and the movingboard 5, so as adjust the door pocket to a height preferred by a user, corresponding to types of a bottle, a PET bottle, or the like to be stored. - As described above, the present shelf device can be applied in order not only to adjust the height of a shelf but also to move of a wall of a partitioned storing space, a door pocket, or the like, so that a product can be provided in which a shelf height/width can be flexibly changed corresponding to sizes of various containers, such as a dish, a pan, a bottle, a PET bottle, or the like, according to differences in family constitution and eating habit. The shelf device of the present invention can be applied to all other various types of storing implements than a refrigerator, such as a small showcase, a business showcase, a piece of furniture, or the like.
- Second Embodiment
- One embodiment of the present invention will be explained below referring to drawings.
- FIG. 7 is an assembly perspective view of a shelf device of the present invention, FIG. 8 is a detailed plan view of a moving leg and a holding member, FIG. 9 is a detailed longitudinal section of the moving leg and the holding member, FIG. 10 is a perspective view of the moving leg, FIG. 11 is a perspective view of the holding member, and FIG. 12 is an elevational perspective view of a refrigerator. In the drawings,2 is a timing belt, 3 is a lever, 4 is a screw shape shaft with which a
gear 6 is integrally formed coaxially, 7 is an inner wall of a refrigerator inside, 15 is a timing belt coupling socket, 16 is the moving leg as a moving means, 17 is an attachment as a fixing means, 18 is a holding member as a holding means, 19 is a frame reinforcing plate, 20 is a removable shelf, and 22 is a slider portion having aspring 21. - A
frame 1 for placing a shelf on it, constituted by a hollow shaped frame is formed by the combination of an upper side frame 1 a and alower side frame 1 b, and ahollow part 10 is formed in the frame. Thetiming belt 2 arranged along the outer periphery of the frame is mounted in the frame utilizing thehollow part 10. Thelever 3 is arranged so as to move along one side of theframe 1, and aninsert piece 3 a extending from the root of thelever 3 is inserted from a slit portion provided in a front lower face of theshelf placing frame 1 into the inside of theshelf placing frame 1 and is fitted into the timingbelt installing socket 15 so as to be coupled with and fixed to thetiming belt 2, whereby thetiming belt 2 is rotationally moved by sliding thelever 3. Thegears 6 meshing with a rack shape portion (not shown) of thetiming belt 2 to be rotated are arranged on the rotationally moving line of thetiming belt 2 and in the respective corners of theframe 1, and ascrew shape shaft 4 is integrally formed with thegear 6 coaxially. Asmall shaft 6 a and asmall shaft 4 a coaxially protruding from thegear 6 and thescrew shape shaft 4 respectively are pivotally supported in a longitudinal up/down direction onbearings frame 1 so that thescrew shape shaft 4 is housed in the respective corners (four portions) of theframe 1. Thetiming belt 2 meshes with the gear to rotate thegear 6 so that thescrew shape shaft 4 rotates sequentially. Although it is explained here that thescrew shape shafts 4 are provided in the four corners, they may be provided in two corners so as to be opposed to each other in the left/right direction, thereby generating stability. The movingleg 16 has a screw tappedhole 16 a of a meshing part as a female screw corresponding to thescrew shape shaft 4, and thescrew shape shaft 4 is screwed into this screw tappedhole 16 a, so that the movingleg 16 is moved up and down by the screw in accordance with the rotation of thescrew shape shaft 4. - Seventeen (17) is a fixing means having a pinching
portion 17 a to be placed at a predetermined position of aninner wall 7 of the refrigerator and is provided with adish portion 17 b at a mouth of the pinchingportion 17 a. The pinching portion is embedded in the inner wall, and theattachment 17 is fixed so that the dish portion becomes flush with the wall face. In the drawing, although a U-shaped groove is employed as the pinching portion, a clamp or the like may be employed as far as it has the same function. As shown in FIG. 11, the holdingmember 18 has a placingface 18 d on which the movingleg 16 is placed from the above and aninsert piece 18 a in the shape of a flat plate extending horizontally from the placing face. That insert piece is inserted in theU-shaped groove 17 a of the attachment so that the holdingmember 18 is fixed to the inner wall via theattachment 17. The holdingmember 18 is provided with an engagingportion 18 b approximately vertically opened from the placing face, so that this engagingportion 18 b is placed in parallel with the inner wall when the holdingmember 18 is inserted into theattachment 17. - As shown in FIG. 10, the moving
leg 16 described above has aflange portion 16 e in a lower end of the screw tappedhole 16 a in which thescrew shape shaft 4 is screwed, a protrudingpiece portion 16 f bent in the axial direction of the hole is formed in one end of thatflange portion 16 e, and a lockingportion 16 b is provided at the tip of the protrudingpiece portion 16 f. When this movingleg 16 is placed on the holdingmember 18, the protrudingpiece portion 16 f of the moving leg is inserted along the engagingportion 18 b of the holding member, and the lockingportion 16 b at the tip of the protruding piece portion is hooked on the engagingportion 18 b of the holding member so that the protruding piece portion is held on the engaging portion and is pinched between the engaging portion and thedish portion 17 b of the attachment to be fixed. Thereby, the movingleg 16 is engaged with the holdingmember 18, so that rattling or floating of theframe 1 can be prevented. Here, the lockingportion 16 f is formed into a claw shape, a hook shape, or the like. Further, even when a load from the frame is weighed on the moving leg and a downward moment works, the protruding piece portion of the moving leg is pressed by the dish portion of the attachment, whereby flexure can be prevented. Since theattachment 17 is embedded inside the inner wall so as to minimize an obstructive part to the surface and the space inside the refrigerator, the space inside the refrigerator can be effectively utilized. - Since the moving
leg 16 is set on the side of theframe 1 via thescrew shape shaft 4 and is fixedly placed on the holdingmember 18 as described above, theframe 1 itself, not the movingleg 16, is actually moved up and down. That is, thelever 3 is slid so that thetiming belt 2, thegear 6, thescrew shape shaft 4, and the movingleg 16 are conjointly moved, and the movingleg 16 is fixed to theattachment 17 installed in theinner wall 7 so that theshelf placing frame 1 moves up and down. Sliding between the holdingmember 18 and the movingleg 16 in the horizontal direction can be prevented by providing the placingface 18 d of the holdingmember 18 and theflange portion 16 e of the movingleg 16, respectively, which come in contact with each other with, for example, ahole portion 18 c and aprotrusion 16 c respectively, so that the hole portion and the protrusion are engaged with each other when the movingleg 16 is placed on the holdingmember 18. Owing to this, when thelever 3 is slid, theframe 1, in which thescrew shape shaft 4 screwed in the movingleg 16 is provided, is prevented from moving in the sliding direction and touching the inner wall, so that the operability of the lever to move the shelf is improved. - Next, the state of the shelf device installed inside the refrigerator will be explained referring to FIG. 12. The holding members are set at the predetermined positions on the
inner wall 7, and the moving legs provided in the respective corners of theshelf placing frame 1 are placed on the holding members so that the shelf device is installed inside the refrigerator. In order to move the shelf up and down, thelever 3 provided on the front face of theframe 1 has to be slid. Since a user operates thislever 3 manually, thelever 3 must be provided on the front face of theframe 1 for the operability's sake, and thus a track for sliding the lever has to be provided. As a technique not to spoil the design, the slit portion is provided in the front lower face of theframe 1 and the insert piece extending from the root of the lever is inserted into this slit portion and connected to the timing belt, as described above. Accordingly, only theshelf placing frame 1 and thelever 3 are visible from the front of the refrigerator, thereby providing a refrigerator having a good design and an excellent operability. - FIG. 13 and FIG. 14 show arrangement examples of refrigerators having the shelf devices set inside the refrigerators. FIG. 13, compartments are arranged in the order of F compartment (freezing compartment), R compartment (cooling compartment), and V compartment (vegetable compartment) from the top, and the
frame 1 having the shelf and thelever 3 is provided inside the R compartment. Incidentally, a refrigerator of a two door type with the F compartment and the R compartment may be employed. In FIG. 14, compartments are arranged in the order of the R compartment, the V compartment, and the F compartment from the top, or in the order of the R compartment, the F 32 compartment, and the V compartment from the top, and theframe 1 having the shelf and thelever 3 is provided inside the R compartment. One (1) is the frame of an up/down movable shelf, 51 is a fixed shelf, 3 is the lever provided in theshelf - FIG. 15 shows a stroke of the
lever 3, and a lever stroke A takes more than a half of the size B of the inside width of the refrigerator, whereby thelever 3 is moved with a small physical force. Sliding range of thelever 3 is preferably limited, so as not to include the left/right end portions, so that thelever 3 can be firmly gripped by a hand in easy operation. If an up/down movable distance C of the shelf is set to ⅕ or smaller of the lever stroke A, the operation becomes easy. This rule is not applied in a motor operation. - FIG. 16 is a view in which the shelf is installed inside the refrigerator, FIG. 17, FIG. 18, and FIG. 19 are views in which the portion of the frame, provided with the screw shape shaft4 (a mechanical part) is embedded between the inner wall and an outer wall of the refrigerator, and FIG. 20 is a view in which a shelf receiving portion for the mechanical part is fixed on the inner wall.
- One (1) is the frame for the up/down movable shelf, 51 is a fixed shelf, 3 is the lever provided in the
frame inner wall frame 1, and 51 a is a shelf receiving portion for the fixedshelf 51. - FIG. 16 is the one in which there is no recess groove in the
inner wall 7. Theframe 1 shown by dashed lines is movable up and down. FIG. 17 is a view in which there are the recess grooves 7 a in theinner wall 7. If there are the recess grooves 7 a, the portion of theframe 1, provided with the screw shape shaft 4 (the mechanical part) can be embedded in each recess groove 7 a, so that the look of the refrigerator inside is improved. FIG. 18 is a view in which there are the recess grooves 7 a for each shelf in theinner wall 7. In FIG. 19, the recess grooves 7 a for each shelf are not provided but the recess grooves vertically passed through are provided for common use for each shelf. Thereby, the shelves can largely range vertically. FIG. 20 is a view in which the inner wall is flat and is provided with ashelf receiving portion 36 for the up/downframe 1. - FIG. 21 and FIG. 22 are perspective views of the
screw shape shaft 4 and the vicinity thereof (the mechanical part). FIG. 21 shows the case where the inner wall is flat, and FIG. 22 shows the case where the screw shaft portions are arranged in the recess grooves of the inner wall. FIG. 23 is a perspective view of the screw shaft portion. - One (1) is the frame including the up/down movable shelf, 2 is the timing belt, 3 is the lever provided on the
timing belt member 18 is arranged in the inner wall of the refrigerator, for example, in its side face. Theprotrusion portion 16 c provided in the movingleg 16 is inserted into thehole portion 18 c provided in the holdingmember 18 to be fixed. Here, although theprotrusion portion 16 c has a triangle horn shape, the shape is not limited to that as far as theprotrusion portion 16 c can be inserted into thehole portion 18 c to be fixed. - FIG. 24 to FIG. 29 are perspective views of the
screw shape shafts 4 and the vicinity thereof (the mechanical parts). - Two (2) is the timing belt, 3 is the lever provided on the
timing belt - FIG. 24(a) is a perspective view of the
screw shape shafts 4 and the vicinity thereof (the mechanical parts), FIG. 24(b) is an enlarged view of the arrow part of FIG. 24(a). With this structure shown in the figures, a skip of a belt tooth due to an unbalanced load can be prevented. That is, therib 52 restricts thebelt 2 in a direction to come off thegear 6, so that skip between thegear 6 and thebelt 2 can be prevented. - FIG. 25(a) is a perspective view of the
screw shape shafts 4 and the vicinity thereof (the mechanical parts). FIG. 25(b) is an enlarged view of the arrow part of FIG. 25(a). With this structure shown in the figures, a skip of a belt tooth due to an unbalanced load can be prevented. That is, thebelt 2 is restricted in a direction to come off thegear 6 by means that thebelt 2 is provided with teeth on both sides and the toothed belt is pinched between thegear 6 and the auxiliary gear 6 b, so that skip between thegear 6 and thebelt 2 can be prevented. - FIG. 26 is a perspective view of the part where the portions around screw shape shafts4 (the mechanical parts) are provided on the
inner wall 7 of the refrigerator. Here, an operating lever (thelever 3 in FIG. 25, etc.) is replaced with themotor 54. The four movable shafts each comprising thescrew shape shaft 4 and thegear 6 are conjointly rotated by directly rotating either one of the movable shafts by means of themotor 54, whereby theframe 1 for a shelf can be moved up and down. This has a structure in which the shelf is lifted up when an up triangle button of the up/down switch 53 is pressed as the shelf is stopped when the up triangle button is released, and the shelf is lowered down when a down triangle button of the up/down switch 53 is pressed as the shelf is stopped when the down triangle button is released. Themotor 54 moves when this switch 53 is pressed. Theflexible code 55 is connected to themotor 54. - FIG. 27 shows an example in which the operating lever is replaced with the
motor 54 having an assistor with a worm gear. - FIG. 28 shows a modified example of the present embodiment in which the movable shafts each consisting of the
screw shaft 4, etc. are fixedly embedded in the case consisting of an inner board and an outer board of the refrigerator. As the movable shafts are embedded in the case body and theopening 56 is provided in theinner wall 7, the movingboards 16 can be extended from thatopening 56 into the inside of the refrigerator, so that a shelf (not shown) put on the movingboards 16 becomes movable up and down. Since the movable shafts are embedded, a neat design and a good look are obtained. - FIG. 29 also shows a modified example in which the movable shafts are embedded in the case of the refrigerator, and the
lever 3 is provided in the front and on one side of the case. Theworm shaft 58 is operated by thelever 3 having therack gear 57. The rotation of theworm shaft 58 is transmitted to the movable shaft (the screw shape shaft), so that the shelf (not shown) is moved up and down conjointly with the up/down movement of thelever 3. - FIG. 30 is a detail plan section showing installation of the lever, FIG. 31 is a detail perspective view showing installation of the lever and the timing belt, and FIG. 32 is a sectional view showing installation of the removable tray is arranged. The same numerals in these drawings as those in the aforementioned FIG. 7 and FIG. 8 show the corresponding parts. In order to lift up the shelf by sliding the
lever 3 rightward in its operation, thescrew shape shaft 4 has a right-hand thread, and one end of thetiming belt 2 is fixed directly to the timingbelt coupling socket 15 on its right side while the other end of the timing belt is connected to aslider portion 22 which is provided in the socket on its left side and has thespring 21 to give a constant tension to thetiming belt 2. (In the case where the shelf is lifted up by sliding the lever leftward its operation, the reverse way is adopted.) With this, the clack of the timing belt can be prevented so as to eliminate rattling. Since the resiliency of the spring can be utilized for the lever operating force to lift up the shelf, the operating force can be reduced. - As shown in FIG. 30, an outer wall of a meshing
portion 16 a having a threaded hole in the movingleg 16 is provided with aprotrusion 16 d at its upper end and on the opposite side to the protrudingpiece portion 16 f so as to face the frame, and an inner wall of a housing portion to house the screw shape shaft in theframe 1 for a shelf is provided with toribs 1 g so as to form a groove 1 h between them. Theprotrusion 16 d is positioned inside the groove 1 h to prevent the moving leg from rotation, so that the movingleg 16 can be held without rotating until the frame having the incorporated timing belt and moving leg has been set in the refrigerator main body. - The
frame reinforcing plate 19 is arranged on the front inside of theframe 1, along the track of thelever 3 which moves along the front part of theframe 1. Accordingly, even when the weight of food put on the shelf is increased, the flexure of the frame can be minimized, and a rectilinear motion in the lever operation can be secured, so that the operability can be maintained excellently. - Twenty (20) shown in FIG. 32 is a shelf removably placed on the
frame 1. The shelf is provided with aU-shaped rib 20 a opening forward in its front lower part so as to catch a flange portion 1 e of theframe 1. Further, the rear part of theshelf 20 is formed into an L-shape so as to cover and wrap the rear part of theframe 1, and aclaw 20 b provided at the tip of the L-shaped rear part of theshelf 20 is engaged with a lower face if of the rear part of theframe 1. Since the shelf is engaged with the frame in the front part and the rear part, the shelf does not slip off from the frame or does not rattle, and further, the integrated construction of the frame and shelf with such engagement leads to the improved strength of the entire shelf. - FIG. 33 is a view in which the screw shape shaft and the moving leg are combined. In the drawing,4 is the screw shape shaft with which the
gear 6 is integrally formed on the same axis, and 16 is the moving leg into which the screw shape shaft is screwed. An average weight load of food placed on one shelf in a general household refrigerator is supposedly about 5 kilograms or 10 kilograms at the most. It is supposed, on the other hand, that the lever operating physical force of approximately 4 kilograms corresponds to a level by which even a female can operate. Taking these into consideration, the screw pitch (advancing distance per rotation of the screw portion) of thescrew shape shaft 4 is preferably set to 9 mm or less and the screw lead angle (spiral angle of the screw thread) is preferably set to 15° degree or less, on a calculation from the stroke of the lever in a case where the up/down movable distance of the shelf is set to approximately 40 mm. Accordingly, the physical force in manual operation to set an up/down position of the shelf is reduced, and the tension caused in the timing belt can be alleviated, so that leading the reliability is improved. - FIG. 34 is a plan section showing an air course structure inside the refrigerator. The same numerals in this drawing as those in the aforementioned FIG. 7 show the corresponding parts,12 and 13 are air outlets, 23 is a face duct for supplying cool air provided between the refrigerator
inner board 25 and the refrigeratorouter board duct 23 so that cool air is led into thehollow part 10 of theframe 1 via the connectingduct 24 provided at the outlet of the side faceduct 23. Though the cool air blowing from the side faceduct 23 blows perpendicularly to the refrigerator inner wall face it is changed to a flow along the refrigerator inner wall by the connectingduct 24 and released to thehollow part 10 as cool air directed to the forward of the refrigerator. This structure is to avoid any obstacles as air course resistance, such as the screw shape shaft provided in the frame, and the cool air led and released into thehollow part 10 blows out from theair outlets hollow part 10. Thus, such air course resistance as obstruction by the screw shape shaft necessary for lifting/lowering the shelf is not caused, so that even a small volume of cool air can flow up to the front face of the frame, whereby the cooling efficiency in the refrigerator can be improved, saving energy. - In the above second embodiment, the
frame reinforcing plate 19 is arranged on front inside of theframe 1, along the track of thelever 3 which moves along the front part of theframe 1. However, an extrusion molded member of metal (e.g., aluminum) may be used for the front part of theframe 1 to arrange thelever 3 and thetiming belt 2 inside the extrusion molded part, whereby deformation of the shelf due to the loaded weight of food is minimized, and the operability of the lever can be maintained excellently. - Third Embodiment
- One embodiment of the present invention will be explained below referring to drawings.
- FIG. 35 is an assembly perspective view of a shelf device of the present invention, FIGS. 36, 37 are detailed sections of inner parts of screw shape shaft gears, FIG. 38 is a detailed perspective view in which a lever and a timing belt are installed, FIG. 39 is a detailed plan section in which the lever is installed, FIG. 40 is a sectional view of the installation of a removable tray, FIG. 41 is a sectional view of a cooling method for a resin tray, FIG. 42 is a sectional view of a cooling method for a metallic tray, and FIG. 43 is a perspective view showing a knob shape of the lever.
- In the drawings,1 is a frame for placing a shelf on it, which forms a frame body in a hollow shape. The
frame 1 consists of an upper frame 1 a and alower frame 1 b, and ahollow part 10 is formed by assembling them. Utilizing the hollow part 10 a timing belt is mounted along the outer periphery of theframe 1. - The
lever 3 is arranged so as to move along one side of theframe 1, and aninsert piece 3 a provided in thelever 3 is inserted through a slit portion provided in a lower face of theframe 1 into the inside of theframe 1 and is fitted into asocket 15 of the coupling means connected to the timing belt, so that thelever 3 is fixedly coupled with thetiming belt 2. Therefore, thetiming belt 2 is rotationally moved by sliding thelever 3. - The
gears 6 meshing with a rack (not shown) of thetiming belt 2 and to rotate are arranged on a rotational/moving line of thetiming belt 2 and in the respective corners of theframe 1, and thescrew shape shaft 4 is integrally formed with thegear 6 on the same axis. - The
screw shape shaft 4 rotates when thegear 6 is rotated by thetiming belt 2. - Five (5) is a moving leg having a screw tapped hole screwed onto the
screw shape shaft 4 and is fed to move up and down in accordance with the rotation of thescrew shape shaft 4. - In the respective corners of the
frame 1,small shafts gear 6 and thescrew shape shaft 4 are supported on thebearings frame 1 and thescrew shape shafts 4 are housed. - In FIGS. 36 and 37, a
small shaft 27 is embedded inside thegear 6. The small shaft comprises an upper supporting shaft 27 a to be inserted into a hole of abearing 1 c of theframe 1 and a holdingportion 27 b provided with a claw 27 c engaged with a step portion inside the gear, and a plurality ofrotatable balls 28 is provided between the upper supporting shaft 27 a and the holdingportion 27 b so as to enable them to rotatably engage with each other. Thegear 6 rotates while the lower face of thebearing 1 c of theframe 1 is kept in contact with a seat portion 27 d of the upper supporting shaft 27 a or with the rotatable balls as shown in FIG. 36 or FIG. 37, respectively. - Since the
balls 28 are provided, the lever operation becomes smooth. Further, in FIG. 37, the upper faces of the balls are protruded from the upper face of the gear so as to keep the lower face of the bearing of the frame in contact with the balls during rotation of the gear, so that even if the upper face of the gear is pressed against the lower face of the bearing by the load of food or the like placed on the shelf, a brake phenomenon on the rotation of the gear is extremely small. Consequently, the operating physical force of the lever is improved. - As shown In FIGS. 38, 39, in order to lift up the shelf by sliding when the
lever 3 in the right direction in its operation, thescrew shape shaft 4 has a right-hand thread, and thetiming belt 2 is installed in such a manner that one end of the timing belt is fixed to thesocket 15 of the timing belt coupling means on its left side while the other end of the timing belt is connected to theslider portion 22 which is provided in the socket on its right side and has thespring 21 to give a constant tension to thetiming belt 2. (In the case where the shelf is lifted up by sliding the lever leftward in its operation, the reverse way is adopted.) - With the above, since the slack of the timing belt can be absorbed by the resiliency of the spring in the lifting up process where the load on lever operation becomes the most, a tooth skip of a belt (position mismatch between the teeth of the gear and the teeth of the belt) can be prevented.
- FIG. 40 is a sectional view in which the removable shelf is installed. In the drawing,1 a is an upper side frame, 1 b is a lower side frame, 3 is a lever, 9 is a resin shelf, and 31 is a metal tray. The
metal tray 31 is placed on the upper part of theresin shelf 9. - As shown in the above, the strength of the
resin shelf 9 can be reinforced with themetal tray 31. - If the shelf placed on the frame is made of a metal, the strength of the shelf is increased.
- FIG. 41 and FIG. 42 are plan sections showing air course structures.
- FIG. 41 shows an air course structure with a
resin shelf 9, wherein cool air does not directly blow against theshelf 9. On the contrary, FIG. 42 shows the air course structure with ametal tray 31, wherein cool air directly blows against thetray 31. - In FIG. 42, part of cool air blowing from the refrigerator rear face to the inside of the refrigerator is shared to a
side face duct 23 and taken into theframe 1 for placing the shelf via aprotrusion ducts 24 and anotch portion 18 provided in the frame at a rear and side portion. The cool air taken in the frame is distributed in the frame, utilizing thehollow part 10 of the frame 1 (1 a, 1 b, 1 g, and the like), that is, a part of the cool air blows against the metal tray placed onframe 1, through ahole portion 30 provided in the frame and the other part of the cool air blows out from theair outlets 12 and 13 (refer to FIG. 34) of the side face and the front side of the frame. - With the above, the entire shelf is uniformly cooled down, so that the temperature distribution is improved. Since a storing space between shelves is also cooled down uniformly, so that the temperature distribution of the entire room is improved.
- FIG. 43 is a perspective view showing a shape of the knob of a lever provided in the
frame 1 for placing a shelf on it. Theknob 3 b of thelever 3 is formed to haverecesses 3 c corresponding to abdominal portions of fingers, so that thelever 3 can be easily pinched to put thereon. - Operational errors are prevented by providing the lever with signs or the like showing the moving of the shelf (here, down/up).
- In the above, the
frame 1 is kept in its height position against the weight of food on the shelf by the frictional resistance on thescrew shape shaft 4 and thegear 6 even in case where thebelt 2 is cut. - Even when there is an unbalanced load on the
shelf 20, there is no deformation in theshelf 20 due to the rigidity of theframe 1. - The height positions of four
screw shafts 4 are preferably set at the same level. In the beginning of the assembly, the height positions of thescrew shafts 4 are set at the highest position or the lowest position, so that the height positions of thescrew shape shaft 4 can be easily set for the same height by abutting the screw shape shaft. - The moving speed of the
frame 1 may be set at a level, for example, so as not to move food placed on theshelf 1 on the frame. - The
lever 3 may be arranged in any position on the frame where thelever 3 causes inconvenience for getting become an food in and out and where the lever is easy to be used by a user. - When the shelf on the frame1 (the tray or the shelf placed on the frame 1) is at a high position, the
frame 1 may be lowered by thelever 3, so that food placed on the back part of the shelf is easily seen and taken out. When the shelf is at a low position, theframe 1 may be lifted up by thelever 3, so that food can be easily taken out by a user with an easy posture. - The
lever 3 is preferably small to such an extent that thelever 3 can be easily pinched. - A cleaning characteristic is improved by making the shelf or the
tray frame 1. If the shelf covers thewhole frame 1, the inside of the shelf refrigerator can be maintained more cleanly. - Furthermore, each constitution described in the above embodiments may be combined optionally.
Claims (27)
1. A refrigerator provided with a shelf device comprising a frame for placing a shelf or the like on it, arranged inside the refrigerator, a timing belt provided inside the frame, a lever provided on the timing belt, and a means for moving the frame in an up/down direction in operative connection with the timing belt rotationally moved by moving the lever.
2. The refrigerator according to , characterized in that a corner portion of the frame is extended to provide an extended portion, the moving means is placed inside the extended portion, and a groove portion in which the extended portion is movably received is provided inside the refrigerator.
claim 1
3. The refrigerator according to , characterized in that the shelf device is employed for a member for closing a ceiling part of a compartment provided inside the refrigerator.
claim 1
4. The refrigerator according to , characterized in that the shelf device is employed for a bottom of a door pocket provided in a door of the refrigerator.
claim 1
5. The refrigerator according to , characterized in comprising an open/close door to close a front face of the refrigerator and a partition wall to partition the inside of the refrigerator plurally, wherein the partition wall is movable.
claim 1
6. The refrigerator according to , characterized in that the frame is provided with a cool air intake for taking cool air in from a cool air supply duct provided between an inner wall and an outer wall of the refrigerator and a cool air outlet for sending out the cool air to the inside of the refrigerator.
claim 1
7. A refrigerator according to , characterized in that the shelf device further comprises a holding means and a fixing means; the frame is provided with a screw shape shaft pivotally supported in an up/down direction; the moving means is provided with a meshing portion for meshing with the screw shape shaft, and a flange portion having a locking portion at one end thereof; the holding means is provided with an engaging portion for engaging with the locking portion at the time when the moving means is placed on the holding means from the above, and an insert piece extending from a placing face where the moving means is placed; and the fixing means is provided with a pinching portion to insert and fix the insert piece and an abutting portion arranged on an open side of the pinching portion to stop the locking portion of the moving means abutting against the abutting portion; and the fixing means is fixed to an inner wall of the refrigerator so that the moving means is fixedly held on the inner wall with aid of the holding means to make the frame movable in the up/down direction.
claim 1
8. The refrigerator according to , characterized in that the locking portion of the moving means extends in an axial direction of the screw shape shaft from the flange portion, and the engaging portion of the holding means is arranged approximately perpendicularly to the placing face.
claim 7
9. The refrigerator according to , characterized in that the insert piece of the holding means is arranged approximately horizontally or in a diagonal direction to the placing face, and the pinching portion of the fixing means is embedded in an inner wall of the refrigerator.
claim 7
10. The refrigerator according to , characterized in that a protrusion or a hole portion is provided in the flange portion of the moving means and a hole portion or a protrusion is provided in the holding means to engage with the protrusion or hole portion of the moving means.
claim 7
11. The refrigerator according to one of , characterized in that a force of a sliding movement of the lever provided on the timing belt is transmitted via the timing belt to a gear which is fixedly and coaxially provided at one end of the screw shape shaft and engaged with the timing belt, so that the screw shape shaft is rotated.
claim 7
12. The refrigerator according to , characterized in that the timing belt is arranged in an inside peripheral part of the frame, and the screw shape shafts engaged with the timing belt to rotate are provided in at least two corners of the frame.
claim 11
13. The refrigerator according to , characterized in that a screw pitch of the screw shape shaft is set at 9 mm or less, and a lead angle of the screw shape shaft is set for 15° degree or less.
claim 11
14. The refrigerator according to one of , characterized in that a protrusion is provided in the moving means on an outer wall of the meshing portion of the moving means, and a groove is provided in the frame correspondingly to the protrusion, on an inner wall of a housing portion for the screw shape shaft, so that the groove guides the protrusion as a track.
claim 7
15. The refrigerator according to , characterized in comprising a connecting duct which is provided in the frame so as to be disposed near an outlet of a cool air supply duct provided between an inner wall and an outer wall of the refrigerator, the connecting duct conducting cool air forward from the outlet of the cool air supply duct to the front inside of the frame.
claim 1
16. The refrigerator according to , characterized in that the shelf device further comprises a timing belt coupling means consisting of a socket and a slider portion which is slidable to the socket and loaded with a spring toward the socket, and the lever and one end of the timing belt is connected to the socket and the other end of the timing belt is connected to the slider portion, so that the frame is moved up and down conjointly with sliding of the lever via timing belt rotationally moved.
claim 1
17. The refrigerator according to , characterized in that the lever is provided with an insert piece formed by extending a root of the lever, and the insert piece is inserted into a slit portion provided in a front part lower face of the frame and is engaged with the socket of the timing belt coupling means for connecting the timing belt so that the lever and the timing belt are fastened to each other.
claim 16
18. The refrigerator according to , characterized in that a frame reinforcing plate is arranged along a track of the lever moving along the frame.
claim 16
19. The refrigerator according to or characterized in that a front part of the frame is a metal frame, and the timing belt is arranged inside the metal frame.
claim 1
16
20. The refrigerator according to , characterized in that the shelf device comprises a removable shelf placed on the frame, and the removable shelf is provided with a lower front part having a U-shaped rib opening forward so as to be engaged with a flange portion formed at a front side inner edge of the frame, and a L-shaped rear part so as to cover a rear part of the frame.
claim 1
21. The refrigerator according to , characterized in that the gear fixedly provided in the screw shape shaft is provided with a plurality of rotatable balls which are embedded inside the gear, and an upper supporting shaft which is rotatably engaged with the gear with intervention of the rotatable balls, the frame is provided with a bearing portion having a hole, and the upper supporting shaft is set to the frame, with its upper end inserted in the hole of the bearing portion, so that the gear can rotate.
claim 11
22. The refrigerator according to , characterized in that the upper face of the rotatable balls is protruded from the upper face of the gear, and the gear rotates while the lower face of the bearing portion of the frame gets in contact with the rotatable balls.
claim 21
23. The refrigerator according to , characterized in that the timing belt is attached to the timing belt coupling means in such a manner that in the case where the lever is slid in the right direction in its operation to lift up the shelf, one end of the timing belt is fixed to the socket of the timing belt coupling means on the left side while the other end of the timing belt is connected to the slider portion of the timing belt coupling means on the right side, and in the case where the lever is slid in the left direction in its operation to lift up the shelf, one end of the timing belt is fixed to the socket of the timing belt coupling means on the right side while the other end of the timing belt is connected to the slider portion of the timing belt coupling means on the left side.
claim 16
24. The refrigerator according to , characterized in that the shelf provided on the frame is made of a resin, and a metal member is placed on the upper face of the shelf.
claim 1
25. The refrigerator according to , characterized in that the shelf provided on the frame is made of a metal.
claim 1
26. The refrigerator according to or , characterized in that part of cool air led to an inside of the frame blows against the metal member or the metal shelf provided on the frame.
claim 24
25
27. The refrigerator according to , characterized in that a knob shape of the lever is formed into a recess dented toward the inner side, corresponding to an abdominal portion of a finger.
claim 1
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000-086488 | 2000-03-27 | ||
JP2000086488 | 2000-03-27 | ||
JP2000236993A JP3648138B2 (en) | 2000-03-27 | 2000-08-04 | refrigerator |
JP2000-236993 | 2000-08-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010025508A1 true US20010025508A1 (en) | 2001-10-04 |
US6363738B2 US6363738B2 (en) | 2002-04-02 |
Family
ID=26588426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/809,000 Expired - Lifetime US6363738B2 (en) | 2000-03-27 | 2001-03-16 | Refrigerator |
Country Status (6)
Country | Link |
---|---|
US (1) | US6363738B2 (en) |
JP (1) | JP3648138B2 (en) |
KR (1) | KR100405795B1 (en) |
CN (1) | CN100476325C (en) |
SG (1) | SG134962A1 (en) |
TW (1) | TW542894B (en) |
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-
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- 2001-02-23 TW TW090104155A patent/TW542894B/en active
- 2001-03-08 KR KR10-2001-0011893A patent/KR100405795B1/en not_active IP Right Cessation
- 2001-03-14 SG SG200101542-9A patent/SG134962A1/en unknown
- 2001-03-16 US US09/809,000 patent/US6363738B2/en not_active Expired - Lifetime
- 2001-03-26 CN CNB011120215A patent/CN100476325C/en not_active Expired - Lifetime
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US20220299259A1 (en) * | 2020-03-20 | 2022-09-22 | Wuxi Haidaer Precision Slices Co., Ltd. | Vertical displacement stopping system |
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Also Published As
Publication number | Publication date |
---|---|
KR100405795B1 (en) | 2003-11-14 |
TW542894B (en) | 2003-07-21 |
JP2001343186A (en) | 2001-12-14 |
SG134962A1 (en) | 2007-09-28 |
US6363738B2 (en) | 2002-04-02 |
KR20010090724A (en) | 2001-10-19 |
CN100476325C (en) | 2009-04-08 |
CN1319754A (en) | 2001-10-31 |
JP3648138B2 (en) | 2005-05-18 |
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