CN102811845B - Guard means for a saw and method of use thereof - Google Patents
Guard means for a saw and method of use thereof Download PDFInfo
- Publication number
- CN102811845B CN102811845B CN201180015694.0A CN201180015694A CN102811845B CN 102811845 B CN102811845 B CN 102811845B CN 201180015694 A CN201180015694 A CN 201180015694A CN 102811845 B CN102811845 B CN 102811845B
- Authority
- CN
- China
- Prior art keywords
- saw
- protector
- guard section
- base plate
- relative
- 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.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
- B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
- B27G19/04—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws for manually-operated power-driven circular saws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
- B27F5/00—Slotted or mortised work
- B27F5/02—Slotting or mortising machines tools therefor
- B27F5/023—Portable plate joiners
Abstract
Guard means are provided for a saw. A first part (16) of the guard means is movable relative to a body of the saw (4) and/or a saw blade (6) in use between a first position (figure 1), wherein at least a portion of the saw blade is substantially covered by the guard means, and at least a second position (figure 2), wherein at least a portion of the saw blade becomes exposed. The guard means further includes at least a second part (18) that is movable relative to said saw body and/or saw blade in use.
Description
Technical field
The present invention relates to the protector for sawing, comprising the saw of protector and using method thereof.
Background technology
Although explanation hereafter relates generally to electric circular saw, wherein in use use electro-motor that saw blade is rotated relative to saw housing, but those skilled in the art will appreciate that feature of the present invention also can be used in the saw of the other types of such as chain saw, manual saw etc.
For saw blade arranges protection department, and be known for hand electric annular saw arranges protection department especially.Conventional protection department is arranged so that can moving between the first position and the second position at least partially of in use protection department usually.In primary importance, protection department usually covers around the part of the cut edge of saw blade or provides barrier, prevents user from unexpectedly contacting saw blade thus.Protection department is brought to the absorption surface that will be cut by saw blade before, protection department usually remain in cover saw blade primary importance at least partially on.When protection department and absorption surface, being moved by the rear portion towards saw blade, promote, regain or otherwise retract at least partially of protection department, exposes the major part of saw blade thus, to allow to carry out darker and/or longer cutting within the workpiece.The movable part of protection department usually towards primary importance elastic biasing, make saw blade and/or protection department from the contact of workpiece remove time saw blade automatically covered by protection department.
The example of the conventional annular saw with removable protection department is disclosed in US2008/0244910.This saw comprises main body and cutting head.Saw blade is attached to main body and is arranged as and in use driven in a rotative pattern by motor.This cutting head comprises upper protection department and the bottom base plate of the upper surface covering saw blade.Cutting head and upper protection department are bonded to base plate pivotly.Lower guard section is fixed to bottom base plate.In use, along with user is in a downward direction towards workpiece movable tool body, cutting head and upper guard section are towards base plate pivotable.Lower guard section moves up in upper guard section, until depth of cut breech lock is coordinated by by lower guard section.When instrument does not use, saw blade encapsulates by the combination of upper guard section and lower guard section completely, unexpectedly contacts with saw blade to prevent user.This protection department also plays the effect in use controlling dust and the fragment of being discharged from workpiece by saw blade.Vacuum or pump unit can be associated with protection department with the extraction of secondary dust.
Simultaneously, when sawing in the horizontal plane towards workpiece and absorption surface, arrangement is above substantially good, when saw advance towards workpiece in direction substantially outside horizontal plane time, and/or saw with position beyond the position first contacted between workpiece is before sawing time, multiple problem can be found in this arrangement.When user wishes the lower part cutting of the longitudinal axis relative to saw carrying out " cut-in type sawing (plunge cut) " and/or use saw blade, this situation often can occur.For carrying out such cutting, must first manually protection department be retracted by user, to make the lower part of saw blade expose, then by saw blade belt extremely and absorption surface.This is potential risky operation, because before use with in use procedure, the relatively large part of saw blade is exposed to user, thereby increases the possibility that saw blade surprisingly contacts with user.In addition, the dust that produces of cutting process and fragment can be discharged from saw blade in not controlled mode thus.
Summary of the invention
Therefore, the object of the present invention is to provide the protector solving problem mentioned above.
Another object of the present invention is to provide a kind of saw with protector solving problem mentioned above.
Another object of the present invention is to provide a kind of method solving the use protector of problem mentioned above.
Another object of the present invention is to provide a kind of use solving problem mentioned above to have the method for the saw cut workpiece of protector.
In a first aspect of the present invention, provide the protector for sawing, in use, the Part I of this protector primary importance and at least between the second place relative to saw body and/or saw blade removable, in this primary importance, saw blade at least partially substantially by guard covers, in this at least second place, being exposed at least partially of saw blade, it is characterized in that, this protector comprises in use relative to described saw body and/or the moveable at least Part II of saw blade.
By providing the protector with at least the second moveable part, before this allows to use saw on the direction downward substantially relative to workpiece or in process, the more vast scale of guard covers saw blade, allows on workpiece, more safely carry out the cutting substantially on vertical axis and/or cut-in type sawing thus.This is contrary with the protection department of prior art disclosed in US2008/0244910, it has the upper guard section fixed relative to saw body and saw blade, and lower guard section, this lower guard section is removable relative to upper guard section, and thus relative to saw body and/or saw blade removable (namely the instrument of prior art only has in use relative to saw body and/or the moveable guard section of saw blade).
Preferably, this at least the second moveable part is removable relative to the first moveable part.
Preferably, in primary importance, the pith of saw blade is by guard covers, and the capped part of saw blade is exposed at least second place.
Preferably, in primary importance, the Part I of protector and at least Part II form continuous print housing or covering part substantially, such as such as when the round casing of looking from the side or covering part, with by saw blade hold or cover wherein, when described in guard section moves at least the second place time in housing or covering part, form gap.
In the second place, first guard section and at least the second guard section are removable relative to one or more standing parts of saw body, saw blade and/or saw base plate, and/or removable relative to one or more parts of protector, one or more parts of this protector are fixed relative to saw body, saw blade and/or saw base plate.This allows exposure or the more big exposure of in use saw blade.
In a preferred embodiment, protector comprises at least four parts.Preferably, two parts are fixed relative to saw body, saw base plate and/or saw blade, and preferably, and two parts are relative to saw body, saw base plate, fixing guard section and/or removable each other.
In one embodiment, when in primary importance, one or more parts of protector and/or protector surround substantially, around and/or surround at least cut edge of saw blade.This cut edge is arranged along the periphery of saw blade or circumferential edges usually, and preferably arranges along the circumferential edges of saw blade.
When use saw is with during cut workpiece and/or when protector is in primary importance with when at least moving between the second place, the part on workpiece of the whole cut edge of usual saw blade or at least cut edge is covered by one or more parts of protector and/or protector substantially, surround, around and/or encirclement.
In one embodiment, saw as such type, namely saw blade is rotatably installed relative to saw body.Usual saw is power saw, and is preferably power Hand saw, such as annular saw, small-sized annular saw, rise-and-fall-saw (plunge saw) etc.Small-sized annular saw mentioned in this article is relatively light, makes user use single hand to carry thus and the saw of exercisable type.
The primary importance of usual protector corresponds to memory location, non-use position, home etc.In this primary importance, prevent at least part of of the cut edge of saw blade, preferably whole cut edge contact object, workpiece or user.
One or more moveable parts of usual protector described in moving to from primary importance at least the second place time, relative to the protector of the base plate of saw body, saw blade, saw body and/or the standing part of such as protector other parts one or more movably, rotatably, pivotly and/or telescopically move.
In one embodiment, protector comprises at least one and fixes or immovable part.Preferably, protector comprises at least two and fixes or immovable part relative to saw body, base plate and/or saw blade.The moveable part of protector is usually removable relative to the standing part of protector.
In one embodiment, along with protector moves from primary importance towards the described at least second place, opening clearance or space between at least two adjacent parts of protector.Preferably, this gap or space are opened between the Part II and the standing part of protector of protector.In use, this gap or space allow part and the absorption surface of the cut edge of saw blade.
In one embodiment, when moving to the second place from primary importance, the Part II of protector moves up in the side of the standing part away from protector.Preferably, in primary importance, the edge of moveable part or end are against the edge of standing part or end, overlapping or adjacent with it, in the second place, the edge of moveable part or end are mobile away from the described edge of described fixing point or end, or move to and be spaced from certain distance.
In one embodiment, move within the standing part of Part I towards protector of protector or the standing part at protector, and/or move in the part fixing relative to saw body, saw blade and/or saw base plate of protector.
In one embodiment, along with protector moves to the second place from primary importance, at least one moveable part of protector moves with overlapping or overlapping with another moveable part or standing part of protector to more.
In one embodiment, the second moveable part is mounted to the base plate of saw slidably, and in use, when protector moves between the first position and the second position, the second moveable part is removable relative to the first moveable part.Preferably, the second guard section is engaged to the first guard section pivotly.
Preferably, one in base plate or the second guard section is provided with protuberance or pin, this protuberance or pin are slidably mounted in the groove being arranged in base plate or the second guard section on another.
Preferably, second moveable part is moving in the radial direction substantially relative to saw blade, and/or along being substantially parallel to the support portion of saw, the axis of longitudinal axis of base plate or base plate moves, this support portion, substrate plate or base plate in use can be positioned on the surface of workpiece.
In one embodiment, in use, by by saw body and/or the saw blade that is associated with saw body towards the base plate of workpiece, saw body and/or move against object, protector moves from primary importance towards the described at least second place.In use, saw body and/or saw blade can move slidably, point-blank, rotatably and/or pivotly relative to workpiece.
In one embodiment, in use, by bringing to absorption surface or against object at least partly by protector, protector moves from primary importance towards the described at least second place.
In one embodiment, protector and/or one or more part are flexibly biased towards primary importance.
In one embodiment, one or more parts of protector produce groove or conduit, and in use, saw blade can move in this groove or conduit.Usually this groove or conduit are U-shapeds substantially.Preferably, when protector is on any position, saw blade can both move in this groove or conduit.In this arrangement, can start saw, wherein saw blade starts to move relative to saw body, simultaneously in primary importance, and the cut edge of guard covers at least saw blade.
In one embodiment, saw comprises saw body and base plate device, bracing or strutting arrangement or base plate.In use, usual base plate device is seated in or is positioned on the surface of workpiece.Further, in use, usual base plate device at least partly substantially at protector between at least one part and workpiece.
Preferably, saw comprise fix relative to saw body upper guard section, movably go up guard section relative to saw body, the lower guard section fixed relative to base plate and movably descend guard section relative to base plate.
Protector at least Part II moves between the first position and the second position time, usually move relative to bracing or strutting arrangement, base supports device or base plate.
In one embodiment, bracing or strutting arrangement, base supports device or base plate provide the position that saw body can engage movably and/or be mounted to.Saw body can slidably, pivotly and/or rotatably be engaged to bracing or strutting arrangement, base supports device or base plate.Thus, in one embodiment, the part fixing relative to saw body of protector can be arranged on bracing or strutting arrangement, base supports device or base plate movably.
In one embodiment, the part of fixing relative to saw body of protector is mounted to the rear end of bracing or strutting arrangement, base supports device or base plate movably.Preferably, the described fixing part of protector is mounted to the rear end of bracing or strutting arrangement pivotly.The part of protector can be fixed relative to saw body but removable relative to bracing or strutting arrangement, base supports device or base plate thus.
In one embodiment, bracing or strutting arrangement, base supports device or base plate comprise groove, groove, recess etc., this groove, groove, recess etc. limit window, in use, saw blade at least partially can through this window with cut workpiece.
In one embodiment, in use, saw body around some pivotables and/or rotation, with by saw blade belt to and absorption surface.Usual saw pivotable around point be the point that at least one part of saw body and/or protector is engaged to bracing or strutting arrangement, base supports device or base plate.
Further, usual saw body pivotable and/or rotate institute around point be positioned at locating below substantially towards bracing or strutting arrangement, base supports device or base plate.
In one embodiment, the part forming protector at least partially of bracing or strutting arrangement, base supports device or base plate, and preferably, form the lower part of protector.
In one embodiment, in use, at least one in the moveable part of protector is slidably mounted in a part for bracing or strutting arrangement, base supports device or base plate.
In a preferred embodiment, along with saw body moves towards use location relative to workpiece, at least two adjacent parts of protector slide separately substantially.Usually, in use, at least one in two parts is slided away from another part on workpiece, and/or is mounted to bracing or strutting arrangement, base supports device or base plate slidably.
In one embodiment, protector comprises depth of cut indicating device.Usually, at least one in the fixing or stationary part of protector comprises this depth of cut indicating device.Further, this depth of cut indicating device prevents, limits and/or limits at least one movement relative to the adjacent part of saw blade, saw body, fixed protection part and/or protector in the moveable part of protector usually.
Usually, depth of cut indicating device is regulated by one or more moveable parts of limiting protector towards the movement of at least second place and/or determines saw blade depth of cut within the workpiece.
Usually, depth of cut device prevents or limits the slip of a part relative to adjacent part of protector.
In one embodiment, saw body comprises handle portion, grip device etc., grasps or hold saw to allow user.
In one embodiment, saw and/or protector comprise locking system.Usually, this locking system prevents protector from moving to the second place from primary importance substantially.
Preferably, elastic biasing means is provided with so that protector and/or saw body are biased to primary importance from the second place.
In one embodiment, protector comprises dust extraction device.Usually, this dust extraction device comprises the hole be limited in one or more parts of protector.In at least primary importance and/or the second place, this hole is preferably positioned at and the forward position of saw body and/or protector, front portion or cut edge adjacent substantially.Further, hose arrangement, vacuum unit etc. is usually used to extract dust and/or fragment by this hole.
Preferably, this dust extraction device is associated with the second removable guard section.
The leading edge of saw blade is the edge of in use saw blade and the point of absorption surface, and is produce the dust of maximum and the position of fragment when using saw blade on workpiece.Because position is for this reason in position saw blade before and/or tangent with saw blade usually, the annular saw protection department of routine does not cover this position, particularly when towards when at least the second place moves.Thus, the arrangement of the part of protector as disclosed herein allows more effective dust and/or fragment to extract.
Preferably, bending substantially in shape or camber towards interior edge of guard section, to form the substantial circular edge of housing or covering part when protector is in primary importance.Further preferably, removable upper guard section towards outer edge and the upper guard section of fixing lower guard section in shape substantially with fixing complementary, such as such as bend in shape or camber, move in fixing upper guard section to allow in use removable upper guard section and fixing lower guard section.
In another aspect of the present invention, the power saw with protector is provided.This power saw has for the power set for drive unit supply power.This drive unit in use drives the rotation of saw blade.Such as, power set can comprise civil power power supply, battery power, rechargeable battery power, solar power etc.Drive unit can comprise motor etc.At power set, between drive unit and saw blade, suitable transmission device, mechanical linkages etc. can be set.
In a second aspect of the present invention, provide the protector for sawing, wherein this protector comprises at least three parts, in primary importance, these at least three parts cover saw blade at least partially, at least one part of described protector primary importance and at least between the second place relative to saw body and/or saw blade removable, thus than in primary importance time expose the greater part of saw blade.
In a third aspect of the present invention, provide a kind of saw comprising protector.
In another aspect of the present invention, provide the method for protector of a kind of use for sawing, described method comprises the step be in use positioned at by protector in the primary importance adjacent with workpiece; And protector is moved to the second place from primary importance, cause the first moveable part of in use protector and at least the second moveable part relative to the step of workpiece, the saw body be associated with protector and/or saw blade movement thus.
According to independent aspects of the present invention, provide a kind of saw, it comprises main part, be arranged as the handle portion that permission is in use grasped by user, and can be positioned on surface of the work in use supporting the base plate of saw, described main part is mounted to described base plate movably, move relative to base plate between the first non-cutting position and the second cutting position to allow main part, wherein said base plate, main part and handle portion are arranged so that on the first non-cutting position, the longitudinal axis of handle portion is substantially parallel to the longitudinal axis of base plate, and on the second cutting position, the longitudinal axis of handle is raised up to substantially upwards or the position of transverse direction, or relative to the longitudinal axis uneven axis substantially of base plate.
When moving to cutting position from enable position or non-cutting position, handle portion from relative to below base plate or parallel position move to above or the movement of angled position substantially move contrary with the handle of the instrument of prior art substantially, and the centre position of the wrist of user when allowing to maintain grasping member part.Thus, the ergonomic efficiency providing improvement relative to the arrangement of base plate and tool body of handle portion of the present invention, and by the single hand tool of user.Position on the handle portions for the trigger switch of instrument also allows by the finger manipulation instrument of the single hand of user (namely the same hand of grasping member part).
Preferably, tool body is mounted to the rear end (namely near the end of the handle portion of instrument) of base plate pivotly.This reduce the possibility of in use instrument " rollback ".
Accompanying drawing explanation
Existing accompanying drawings specific embodiment of the present invention, in the accompanying drawings:
Fig. 1 shows the three-dimensional view of the right-hand side of saw according to an aspect of the present invention;
Fig. 2 shows the side view of protector according to an embodiment of the invention and saw blade;
Fig. 3 shows the side view of saw and protector, and wherein protector is in the second cutting position;
Fig. 4 a-4d shows the side view moving to saw and protector in the process of the second cutting position in Fig. 4 d at protector respectively from the non-cutting position of first Fig. 4 a;
Fig. 5 respectively illustrates the three-dimensional view of the left-hand side of saw and protector; And
Fig. 6 shows the three-dimensional view of the left-hand side of protector.
Detailed description of the invention
Embodiment hereafter exemplified with according to of the present invention for power saw, especially hand electric annular saw, the example of protection department.This protection department is arranged as the cut edge at least covering on memory location or primary importance and be engaged to the saw blade of saw, and protection department is provided with at least two moveable parts, to limit the region that saw blade is exposed to user in cutting position or the second place.
Two removable guard sections move relative to the fixed protection part of protection department, to allow cut edge and the absorption surface of saw blade in the second place.When using saw on the direction downward substantially relative to workpiece, this arrangement is advantageous particularly, because it allows to cut within the workpiece substantially tightening on straight axis, and/or allows more safely on workpiece, to carry out cut-in type sawing.
First referring to Fig. 1, the three-dimensional view of hand-held round power saw 2 is shown.This saw comprises main body or housing 4, and it surrounds the drive unit (not shown) of electro-motor form.Saw 2 in this embodiment is usually by mains-supplied, but those skilled in the art can understand, and this saw can also be battery-powered or powered by any other suitable electric installation comparably.In use, this motor drives the rotation of saw blade 6.
Saw shown in Fig. 1 is in first " safety " position, wherein saw blade 6 cut edge by protection department 8 around, to prevent from the side close to the cut edge of saw blade.This arrangement guarantee saw blade 6 cut edge can not unexpectedly with the part contact of object or user.
In shown arrangement, in primary importance, the cut edge of saw blade 6 can activated (namely saw can switch to " unlatchings " state, rotate to allow saw blade relative to housing 4) saw blade simultaneously still keep by protector 8 complete around.
Usually also usually press/pull on/off switch or trigger 12 with forefinger on the other hand by the handle portion 10 of user one grasped housing 4, and saw is activated.In this embodiment, trigger 12 is positioned on the lower surface of handle portion.
Saw 2 in this example is also equipped with base plate or base plate 22.Base plate 22 is in use positioned on the surface of the workpiece that will cut, and for saw provides support in sawing process.Base plate can be equipped with one or more table, chi, scale etc. alternatively, to assist angle, the degree of depth and/or the length of cutting and/or measure cutting more accurately.Base plate 22 can also coordinate with track (not shown), and saw can movably or be fixedly mounted on this track, to increase the accuracy of sawing.As will be hereinafter described in more detail like that, the housing 4 of saw moves pivotly relative to base plate 22 usually, moves to the second cutting position to allow housing 4 and saw blade 6 from the first non-cutting position.
Protection department 8 in this embodiment is divided into four sections or part 14,16,18,20.In explanation, two in guard section are called primary protection part or upper guard section 14,16, because in use they cover the major part of saw blade 6, and are generally the upper part of saw blade; Two in guard section are called supplemental protective part or lower guard section 18,20, because in use, relative to major part or upper part 14,16, they cover the smaller portions of saw blade 6, and are usually set to the lower part covering saw blade.
In use, upper guard section 14 is bonded to housing 4 and handle 12, and relative to housing 4 and handle 12 fixing (namely keeping static relative to housing 4 and handle 12).The base end 9 of upper guard section 14 is mounted to the rear end 11(of base plate 22 namely near the end of handle 12 pivotly via pivotal pin 24), to allow in use, housing 4, upper guard section 14 and handle 12 are towards base plate 22(and thus towards the workpiece that base plate 22 is located thereon) move pivotly.Upper guard section 14 is called fixed protection part, because it is fixed relative to instrument/saw body.
Lower guard section 20 combines and is fixed to base plate 22(and namely keeps static relative to base plate), and rear end 11 that is usual and base plate is adjacent to fix.Lower protection department 20 projects upwards from base plate 22 towards housing 4.In this embodiment, the longitudinal axis of guard section 20 is substantially parallel to the longitudinal axis of base plate 22.Lower guard section 20 is called fixed protection part, because it is fixed relative to base plate.Along with upper guard section 14 moves towards base plate 22, lower guard section 20 moves up in guard section 14 inner slide.
Adjacent with the front end 13 of upper guard section 16 and with front end 15 adjacent of lower guard section 18, via pivotal pin 17, upper guard section 16 is mounted to lower guard section 18(front end pivotly and is generally end farthest away from housing 4).Thus, upper guard section 16 relative to upper guard section 14 and housing 4, lower guard section 18 and base plate 22 removable.In this embodiment, as hereinafter discussed in more detail, upper guard section 16 is arranged as in use along with housing 4 and guard section 14 move towards base plate 22, and slides in upper guard section 14.Upper guard section 16 is called removable guard section, because it is removable relative to instrument/saw body, lower guard section 18 and base plate 22.
Lower guard section 18 is mounted to base plate 22 slidably, and removable on the direction of longitudinal axis being substantially parallel to base plate 22.More particularly, when guard section 18 moves to the second cutting position from the first non-cutting position instantly, lower guard section 18 is away from the rear end 11 of base plate 22, and the front end 19 towards base plate 22 is moved.Base plate 22 has the flange portion 21 that surface from it projects upwards towards housing 4.Elongated slot 36 is limited in flange portion 21, makes the longitudinal axis of groove 36 be substantially parallel to the longitudinal axis of base plate 22.A part for pivotal pin 17 or other protruding member are slidably mounted in groove 36, move to guide the slip between the first position and the second position of lower guard section 18.Lower guard section 18 is called removable guard section, because it is removable relative to instrument/saw body, lower guard section 16 and base plate 22.
In use, when user by saw from shown in Fig. 1 first safety or non-cutting position move to as shown in Fig. 3 and 4d second cutting or sawing position time, saw housing 4 and upper guard section 14 around pin 24 towards base plate 22 pivotable.It is lifted relative to workpiece and base plate 22 and realizes this moved by user's grasping member 10.This causes guard section 16 upward sliding inside upper guard section 14, and causes lower guard section 18 away from lower guard section 20 slide (namely descending guard section 18 to move towards the front end 19 of base plate 22).On the first non-cutting position, saw blade, against the front end 25 of lower guard section 20, encapsulates by the rear end 23 of lower guard section 18 thus substantially.Along with lower guard section 18 moves to the second cutting position, between the end 23 and 25 of lower guard section 18,20, form gap, allow cast-cutting saw slice to be cut in workpiece thus.When guard section 18,20 is separated, user has the good sight line watching saw blade, protects the cut edge of saw blade substantially not by close from the side on base plate 22 simultaneously.In addition, when moving to the second place, lower guard section 20 and the movement of upper guard section 16 in upper guard section 14 provide compact safeguard structure, and this safeguard structure has the visual exterior surface area of the little user of the exterior surface area more visual than the user of the safeguard structure in primary importance.
Protection department 8 is shown how towards the further details of the second cutting position or use location movement in Fig. 2.In fig. 2, show protection department 8 in a partly opened position on, wherein the cutting part of saw blade 26 or cut edge extend through the hole in base plate 22, and extend to workpiece (not shown).Partially open and mean such fact, namely descend guard section 18 forward slip on the direction A away from lower guard section 20, this allows upper guard section 16 substantially in directionb in upper guard section 14 inner slide.These move is due to when not shown in handle 10(Fig. 2) to rise and guard section 14 causes towards the rotatory force applied by user during base plate 22 pivotable substantially in direction c around pivotal pin 24.The base end 25 of lower guard section 20 remains fixed on base plate, but moves down towards base plate 22 along with upper guard section 14, and the upper end (not shown) of guard section 20 is in upper guard section 14 medial movement.In this arrangement, all positions in moving from primary importance towards the second use location, the cut edge 26 on base plate 22 of saw blade 8 all keeps being covered by protection department, and wherein in this example, saw blade 8 exposes maximum amount in the position of use.
Second use location or the cutting position of saw 2 have been shown in Fig. 3.Here can see and handle 10 has been raised up at utmost away from base plate 22, wherein go up guard section 14 around pivotal pin 24 pivotable, and its lower limb 31 be against the upper surface of base plate 22.Upper guard section 16 and two lower guard sections 18,20 are positioned in fact the inside of guard section 14, and saw blade 8 projects at utmost through base plate 22 and projects in workpiece (not shown).
Handle 10 is moved to the second cutting position from the first non-cutting position, the position of handle will be moved to favourable orientation operation saw 2 comparatively being met to ergonomics, so that user can apply more power as requested, and thus to saw more multi-control, particularly when promoting saw along workpiece on less horizontal direction, and/or during selection depth of cut, wherein, in the first non-cutting position, the longitudinal axis of handle is positioned in (handle is on the position near base plate 22) on position minimum substantially and is substantially parallel to the longitudinal axis of base plate 22, in the second cutting position, on the position that the longitudinal axis of handle is positioned at upwards or goes up most (handle is in from base plate 22 position farthest).This is favourable relative to traditional annular saw, and in traditional annular saw, the pivotal point of saw is located towards the front portion of base plate, and user must by handle from the position below position is above pulled to downwards thus, to operate saw.
Depth of cut (namely saw blade projects to the degree of depth under base plate 22) can be selected by using depth mechanism 28.Depth mechanism 28 can arrange and limit bar (not shown), and it limits upper guard section 16 in the amount of upper guard section 14 medial movement, can limit the movement of protection department 8 thus, and restriction saw blade 6 can project to the degree of depth under base plate 22 thus.This depth mechanism stopper can also be placed on the slide mechanism of lower guard section 18 relative to base plate 22, to have identical effect.The movement of protection department, and the movement of sawing thus as a whole can be controlled by interlock switch 30.This interlock switch 30 in this example is located, between housing and upper guard section 14 towards the top of housing 4.Interlock switch usually first by the thumb-activated of user, and allows the movement of protection department.If the offhand cutting of user and do not depress interlock switch, even if activated saw blade 6 by trigger 12, saw 2 and saw protection department 8 have also still remained on the first home.
Fig. 4 a-4d shows the various positions of protection department 8 movement between the full cutting position of second shown in the first home shown in 4a to Fig. 4 d.Can see in fig .4, even if saw blade activated, saw blade 6 is also protected completely, until pressing interlock switch 30(is not shown here) and removable guard section can move.Fig. 4 a-4d shows and around pivotal pin 24, housing 4 and guard section 14 is rotated towards base plate 22 along with by user, and how guard section 14-20 relative to each other moves.Fig. 4 b-4c shows lower guard section 18,20 and how to slide separately, and how upper guard section 16 is in upper guard section 14 medial movement, exposes a part for saw blade thus, to cut the workpiece below base plate 22.Fig. 4 a and 4d shows and runs through until the cutting movement scope of the complete degree of depth, how to be covered by the section be positioned on base plate 22 of saw blade.In this example, protection department 8 is resiliently biased into primary importance by spring from the second place, if make user's release lever, then moveable guard section springs back to the first home, in this first home saw blade completely by by protection department 8 around.
Fig. 5 shows the right-hand side of the saw 2 on the first home, and wherein handle 10 is orientated and is basically parallel to base plate 22.Dust extraction hole 32 can be seen in this view.This hole 32 is positioned at front end 13 adjacent with upper guard section 16, and it is first adjacent with a part for absorption surface (producing maximum dust thus in cutting process) to be optimally placed as all the time with saw blade in this example.No matter guard section 16 is in which position, all can near the point of the generation dust of saw blade and fragment or with this point tangent place continuous drawing dust and fragment substantially.The wall in hole 32 and/or the inner surface of upper guard section 16 can have and be limited to one or more groove and/or conduit, to control the air flowing of upwards guard section 16, and thus by the dust of its vicinity and the extraction optimization of fragment.Usually, the vacuum unit being equipped with flexible pipe is engaged to hole 32, to provide suction, to remove dust and/or fragment to the position away from saw blade.
Fig. 6 illustrates in greater detail left-hand side or the rear portion of protection department 8.Can see, dust extraction hole 32 is diamond shape substantially.By the position in hole 32 and shape optimization, maximize so that dust is collected, and need not consider can the various saw blade type that use and size together with saw interchangeably.Upper protection department 16 also has the prominent features portion 34 before the pivotal point 17 of upper protection department 16 and lower guard section 18.This prominent features portion guarantee upper guard section 16 in its moving process with base plate 22 keeping parallelism, and prevent it from blocking.In this example, have a torsion spring (not shown), protection department 8 is biased to the first closed position by it.This figure also show additional maintenance segment or plate 38, it is added on the rear end adjacent with protection department 8, to guarantee that cutting head (housing 4, saw blade 6 and guard section 14,20) runs through mobile and the scope of cutting operation and run through to saw and all have stability and accuracy from the movement of the second cutting position to the first home.
It should be noted that the pivotable of a guard section or upper guard section 14 or the Linear-moving of another guard section of driving in rotary moving or lower guard section 18.This is because lower guard section 18 at upper guard section 14 relative to before the direction in rotary moving of pivotal pin 24.
Claims (24)
1. the protector for sawing, comprising:
First guard section of described protector, its in use primary importance and at least between the second place relative to saw body and/or saw blade removable, in described primary importance, described saw blade at least partially substantially by described guard covers, in the described at least second place, being exposed at least partially of saw blade; With
In use relative at least the second guard section of described saw body and/or the moveable described protector of saw blade; And
It is characterized in that, in use, when moving to the described second place from described primary importance, at least the second guard section Linear-moving substantially described in the driving in rotary moving of described first guard section.
2. protector according to claim 1, is characterized in that, in use, described at least the second guard section is removable relative to described first guard section.
3. protector according to claim 1, it is characterized in that, in described primary importance, described first guard section and described at least the second guard section form continuous print housing or covering part substantially, described in guard section is moved at least the second place time in housing or covering part, produce gap.
4. protector according to claim 1, it is characterized in that, in use, described first guard section and described at least the second guard section are removable relative to one or more standing parts of the saw body of saw, saw blade and/or saw base plate, and/or removable relative to one or more parts of described protector, one or more parts of described protector are fixed relative to saw body, saw blade and/or saw base plate.
5. protector according to claim 1, is characterized in that, described protector comprises at least four parts; Wherein two described parts are fixed relative to saw body, saw blade and/or saw base plate, and part described in two other is relative to saw body, saw blade, saw base plate, fixing guard section and/or relative to each other removable.
6. protector according to claim 1, it is characterized in that, in described primary importance, the end of fixed protection part or edge are against removable guard section, adjacent or relation in an overlapping with it, in the described at least second place, the described end of fixed protection part or edge and removable guard section are moved apart, to form gap betwixt.
7. protector according to claim 1, it is characterized in that, in use, described in moving to from described primary importance at least the second place time, first guard section is towards the standing part of described protector, in the standing part of described protector, or move with the overlapping relation of the increase of the standing part relative to described protector, and/or towards described protector relative to saw body, the part that saw blade and/or saw base plate are fixed, at described protector relative to saw body, in the part that saw blade and/or saw base plate are fixed, or with relative to described protector relative to saw body, the overlapping relation of the increase of part that saw blade and/or saw base plate are fixed and moving.
8. protector according to claim 1, is characterized in that, in use, the second guard section is mounted to the base plate of saw slidably, and in use, described second guard section is engaged to described first guard section pivotly.
9. protector according to claim 8, it is characterized in that, one in base plate or the second guard section is provided with protuberance or pin, and described protuberance or pin are slidably mounted in the groove being arranged in described base plate or described second guard section on another.
10. protector according to claim 1, is characterized in that, described protector is arranged on saw, and described saw comprises saw body and in use described saw being supported on the base plate on workpiece.
11. protectors according to claim 10, it is characterized in that, described saw comprise fix relative to described saw body upper guard section, movably to go up guard section, the lower guard section fixing relative to described base plate relative to described saw body and movably descend guard section relative to described base plate.
12. protectors according to claim 10, is characterized in that, via the pivoting device be associated with in described guard section, described saw body moves pivotly relative to described base plate.
13. protectors according to claim 12, is characterized in that, described saw body is mounted to the rear end of described base plate pivotly.
14. protectors according to claim 10, it is characterized in that, in use, moved pivotly towards base plate and/or workpiece by a part for the saw blade making described saw body and/or be associated with described saw body, at least second place described in described protector moves to from described primary importance.
15. protectors according to claim 14, it is characterized in that, described saw body comprises handle portion, and described handle portion is arranged as when described saw is moved to the described second place from described primary importance, moves in an upward direction away from described base plate.
16. protectors according to claim 15, it is characterized in that, described base plate, main part and described handle portion are arranged so that in described primary importance, the longitudinal axis of described handle portion is substantially parallel to the longitudinal axis of described base plate, and in the described second place, the longitudinal axis of described handle portion is raised up to substantially upwards or the position of transverse direction, or relative to the uneven position of the longitudinal axis of described base plate.
17. protectors according to claim 1, is characterized in that, described protector comprises depth of cut indicating device.
18. protectors according to claim 17, it is characterized in that, one in the standing part of described protector comprises described depth of cut indicating device, and in use, described depth of cut indicating device prevents, limits and/or limits at least one movement relative to the adjacent part of saw blade, saw body, fixed protection part and/or described protector in the moveable part of described protector.
19. protectors according to claim 1, is characterized in that, saw and/or described protector comprise locking system, move to the described second place in use preventing described protector from described primary importance.
20. protectors according to claim 1, is characterized in that, be provided with elastic biasing means, in use described protector is biased to primary importance from the second place.
21. protectors according to claim 1, is characterized in that, described protector comprises dust extraction device.
22. protectors according to claim 21, is characterized in that, described dust extraction device comprises the hole in use adjacent with the forward position of saw blade and/or protector, front portion or the cut edge guard section of restriction.
23. protectors according to claim 22, is characterized in that, described dust extraction device is arranged on the moveable upper guard section of described protector.
24. 1 kinds of usings method of protector for sawing, described method comprises the step be in use positioned at by protector in the primary importance adjacent with workpiece; And described protector is moved to the second place from described primary importance, cause the first guard section of in use described protector and at least the second guard section relative to workpiece, saw body and/or the step of saw blade movement that is associated with described protector thus
And it is characterized in that, in use, when moving to the described second place from described primary importance, at least the second guard section Linear-moving substantially described in the driving in rotary moving of described first guard section.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB1003262.1A GB201003262D0 (en) | 2010-02-26 | 2010-02-26 | Saw guard means and method of use thereof |
| GB1003262.1 | 2010-02-26 | ||
| PCT/GB2011/050347 WO2011104538A1 (en) | 2010-02-26 | 2011-02-23 | Guard means for a saw and method of use thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102811845A CN102811845A (en) | 2012-12-05 |
| CN102811845B true CN102811845B (en) | 2015-04-15 |
Family
ID=42125681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180015694.0A Active CN102811845B (en) | 2010-02-26 | 2011-02-23 | Guard means for a saw and method of use thereof |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN102811845B (en) |
| GB (1) | GB201003262D0 (en) |
| WO (1) | WO2011104538A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201102368D0 (en) * | 2011-02-10 | 2011-03-30 | 7Rdd Ltd | Powered circular saw and method of use thereof |
| DE102013203621B4 (en) * | 2013-03-04 | 2023-12-14 | Robert Bosch Gmbh | Hand tool |
| CN104827375B (en) * | 2015-05-10 | 2017-07-14 | 重庆工业职业技术学院 | The mechanical device and its application method of dustless processing can be carried out to stone plate |
| US20200061795A1 (en) * | 2016-11-16 | 2020-02-27 | Envirochasing Ip Holdings Pty Ltd | Extraction Apparatus |
| CN108748408A (en) * | 2018-08-03 | 2018-11-06 | 广东知识城运营服务有限公司 | A kind of hand-held saw blade being equipped with fine tuning accessory plate |
| CN109664382B (en) * | 2018-12-13 | 2021-06-15 | 山东闼闼永强腾达木业有限公司 | Wood stick fluting ware |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1792204A (en) * | 1930-02-17 | 1931-02-10 | J D Wallace & Company | Electric handsaw |
| US1858459A (en) * | 1930-01-03 | 1932-05-17 | Black & Decker Mfg Co | Portable cutting tool |
| US2669264A (en) * | 1946-12-03 | 1954-02-16 | Skil Corp | Guard for the periphery of rotary disk cutters on machine tools |
| DE934723C (en) * | 1954-04-01 | 1955-11-03 | Kurt Sahm | Guide device for directly or indirectly driven circular saws |
| US4022182A (en) * | 1976-01-12 | 1977-05-10 | Lenkevich Steve T | Dust and water confinement unit for portable circular saw |
| US5239756A (en) * | 1991-07-22 | 1993-08-31 | Robert Bosch Gmbh | Hand circular saw, particularly plunge saw |
| US5537748A (en) * | 1991-07-09 | 1996-07-23 | Ryobi Limited | Cover structure for electric circular saw |
| US5893311A (en) * | 1997-04-28 | 1999-04-13 | Huang; Peter | Protective covers of power saw |
| CN1718340A (en) * | 2004-07-07 | 2006-01-11 | 布莱克和戴克公司 | Blade guard assembly for saws |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0533220Y2 (en) * | 1987-11-13 | 1993-08-24 | ||
| US6722046B2 (en) * | 2001-09-04 | 2004-04-20 | Ben L Evenson | Portable forward cutting power saw |
| US20080244910A1 (en) | 2004-05-28 | 2008-10-09 | Scientific Molding Corporation Ltd. | Hand-Held Circular Saw, In Particular Plunge-Cut Saw |
-
2010
- 2010-02-26 GB GBGB1003262.1A patent/GB201003262D0/en not_active Ceased
-
2011
- 2011-02-23 CN CN201180015694.0A patent/CN102811845B/en active Active
- 2011-02-23 WO PCT/GB2011/050347 patent/WO2011104538A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1858459A (en) * | 1930-01-03 | 1932-05-17 | Black & Decker Mfg Co | Portable cutting tool |
| US1792204A (en) * | 1930-02-17 | 1931-02-10 | J D Wallace & Company | Electric handsaw |
| US2669264A (en) * | 1946-12-03 | 1954-02-16 | Skil Corp | Guard for the periphery of rotary disk cutters on machine tools |
| DE934723C (en) * | 1954-04-01 | 1955-11-03 | Kurt Sahm | Guide device for directly or indirectly driven circular saws |
| US4022182A (en) * | 1976-01-12 | 1977-05-10 | Lenkevich Steve T | Dust and water confinement unit for portable circular saw |
| US5537748A (en) * | 1991-07-09 | 1996-07-23 | Ryobi Limited | Cover structure for electric circular saw |
| US5239756A (en) * | 1991-07-22 | 1993-08-31 | Robert Bosch Gmbh | Hand circular saw, particularly plunge saw |
| US5893311A (en) * | 1997-04-28 | 1999-04-13 | Huang; Peter | Protective covers of power saw |
| CN1718340A (en) * | 2004-07-07 | 2006-01-11 | 布莱克和戴克公司 | Blade guard assembly for saws |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011104538A1 (en) | 2011-09-01 |
| CN102811845A (en) | 2012-12-05 |
| GB201003262D0 (en) | 2010-04-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102811845B (en) | Guard means for a saw and method of use thereof | |
| CN102114555B (en) | Electric tool | |
| US9101993B2 (en) | Portable cutter | |
| EP2969423B1 (en) | Blade drop power tool with dust management | |
| US20070101845A1 (en) | Saw | |
| EP2673123B1 (en) | Powered circular saw and method of use thereof | |
| EP1772222B1 (en) | Sliding compound miter saw with locking mechanism | |
| EP2689878B1 (en) | Saw | |
| CN103108731B (en) | For the copying system of electric saw | |
| CN102848016B (en) | Portable cutter | |
| US6758122B2 (en) | Guard and control assembly for a compound miter saw | |
| EP1681134A1 (en) | Device for generating guidance lines | |
| CA2211914A1 (en) | Remote lower guard lift lever mechanism for circular saws | |
| CN111790942A (en) | Multi-dimensional positioning cutting machine head and double-head saw cutting machine | |
| CN201493555U (en) | Hand-held circular saw guard shield mechanism | |
| CN201493556U (en) | Hand-held circular saw guard shield safe locking mechanism | |
| EP2591898B1 (en) | Chop saw with top table | |
| EP2259889B1 (en) | Chop sawing machine provided with improved guard means | |
| EP3168017B1 (en) | Saw | |
| CN102658398B (en) | Electric tool | |
| CN112602483A (en) | Branch sawing machine | |
| US20180207734A1 (en) | Cutting tool | |
| EP2355963B1 (en) | A combined cutting machine with safety device | |
| EP2403695B1 (en) | Improved compound chop sawing machine | |
| CN218837986U (en) | Vertical cutting machine with rotary workbench |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160918 Address after: The British Virgin Islands of Tortola Patentee after: Research & design development Plus Ltd Address before: Yorkshire Patentee before: 7RDD Limited |