CN102811845A - Guard means for a saw and method of use thereof - Google Patents

Guard means for a saw and method of use thereof Download PDF

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Publication number
CN102811845A
CN102811845A CN2011800156940A CN201180015694A CN102811845A CN 102811845 A CN102811845 A CN 102811845A CN 2011800156940 A CN2011800156940 A CN 2011800156940A CN 201180015694 A CN201180015694 A CN 201180015694A CN 102811845 A CN102811845 A CN 102811845A
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CN
China
Prior art keywords
saw
protector
guard section
base plate
respect
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Granted
Application number
CN2011800156940A
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Chinese (zh)
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CN102811845B (en
Inventor
M·尼科尔森
R·费思
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Research & design development Plus Ltd
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7RDD Ltd
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Publication of CN102811845A publication Critical patent/CN102811845A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27GACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
    • B27G19/04Safety 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27FDOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
    • B27F5/00Slotted or mortised work
    • B27F5/02Slotting or mortising machines tools therefor
    • B27F5/023Portable 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

Protector that is used to saw and method for using thereof
Technical field
The present invention relates to the protector that is used to saw, the saw that comprises protector and method for using thereof.
Background technology
Though the explanation of hereinafter relates generally to electric circular saw; Wherein in use use electro-motor to make saw blade, but those skilled in the art will appreciate that characteristic of the present invention also can be used in the saw such as the other types of chain saw, manual saw etc. with respect to the rotation of saw housing.
For saw blade is provided with protection department, and be known for the hand electric annular saw is provided with protection department especially.Conventional protection department is arranged so that usually in use at least a portion of protection department can move between the primary importance and the second place.On primary importance, protection department covers or barrier is provided around the part of the cut edge of saw blade usually, prevents that thus the user from all of a sudden contacting saw blade.Protection department is brought to contact by the workpiece of saw blade cutting before, protection department usually remains on the primary importance of at least a portion of covering saw blade.When protection department contacted with workpiece, at least a portion of protection department moved towards the rear portion of saw blade, promoted, regained, or otherwise withdrawal, and the major part with saw blade exposes thus, to allow in workpiece, carrying out dark and/or long cutting.The movable part of protection department is usually towards the primary importance elastic biasing, make saw blade and/or protection department from the contacting of workpiece when removing saw blade cover by protection department automatically.
The example of the conventional annular saw with removable protection department is disclosed among the US2008/0244910.This saw comprises main body and cutting head.Saw blade is attached to main body and is arranged as in use and driven with rotation mode by motor.This cutting head comprises the last protection department and the bottom base plate of the upper surface that covers saw blade.Cutting head and last protection department are bonded to base plate pivotly.Following guard section is fixed to the bottom base plate.In use, along with the user on downward direction towards workpiece Move tool main body, cutting head and last guard section pivot towards base plate.Following guard section upwards moves in last guard section, is cooperated by following guard section up to the depth of cut breech lock.When instrument did not use, the combination of last guard section and following guard section with the saw blade encapsulation, all of a sudden contacted with saw blade to prevent the user fully.This protection department also plays and in use controls the dust of being discharged from workpiece by saw blade and the effect of fragment.Vacuum or pump unit can be associated with protection department with the extraction of auxiliary dust.
Simultaneously; When the saw on the horizontal plane when workpiece contacts with workpiece; The arrangement of preceding text is good basically; When saw substantially on the direction outside the horizontal plane when workpiece advances, and/or between saw and the workpiece at first during the position of position contacting beyond the front of saw, in this arrangement, can find a plurality of problems.When the user hope to carry out " cut-in type sawing (plunge cut) " and/or use saw blade with respect to the lower part cutting of the longitudinal axis of saw the time, this situation regular meeting takes place.For carrying out such cutting, must at first manually protection department be withdrawn by the user, so that the lower part of saw blade exposes, then saw blade belt is extremely contacted with workpiece.This is potential risky operation because before use with use in, the big relatively part of saw blade is exposed to the user, increased the unexpected possibility that contacts of saw blade and user thus.In addition, dust that cutting process produced thus and fragment can be discharged from saw blade with controlled way not.
Summary of the invention
Therefore, the object of the present invention is to provide the protector that solves problem mentioned above.
Another object of the present invention is to provide a kind of saw with protector that solves problem mentioned above.
Another purpose of the present invention is to provide a kind of method that solves the use protector of problem mentioned above.
The method that workpiece is cut in the sawing that another purpose of the present invention is to provide a kind of use that solves problem mentioned above to have protector.
In first aspect of the present invention; The protector that is used to saw is provided, and in use, the first of this protector is in primary importance and removable with respect to saw body and/or saw blade between the second place at least; In this primary importance; At least a portion of saw blade is substantially by guard covers, and at least in the second place, at least a portion of saw blade is exposed at this; It is characterized in that this protector comprises in use with respect to said saw body and/or saw blade second portion at least movably.
Through the protector with at least the second moveable part is provided; This allows on the direction downward substantially with respect to workpiece, to use before the saw or in the process; The more vast scale of guard covers saw blade allows more safely carrying out cutting on vertical axis substantially and/or cut-in type sawing on the workpiece thus.The protection department of disclosed prior art is opposite among this and the US2008/0244910; It has with respect to saw body and the fixing last guard section of saw blade; And following guard section; This time guard section is removable with respect to last guard section, and thus with respect to saw body and/or saw blade removable (just the instrument of prior art only has in use with respect to saw body and/or saw blade guard section movably).
Preferably, this at least the second moveable part is removable with respect to first moveable part.
Preferably, on primary importance, the pith of saw blade is by guard covers, and the part that is capped of saw blade is exposed on the second place at least.
Preferably; On primary importance; The first of protector and at least second portion form continuous substantially housing or covering part; Such as the round casing that for example ought look from the side or covering part, saw blade being held or cover wherein,, guard section in housing or covering part, forms the gap when moving to the said second place at least.
On the second place; First guard section and at least the second guard section are removable with respect to one or more standing parts, saw blade and/or the saw base plate of saw body; And/or removable with respect to one or more parts of protector, one or more parts of this protector are fixed with respect to saw body, saw blade and/or saw base plate.This allows the in use exposure or the more big exposure of saw blade.
In a preferred embodiment, protector comprises at least four parts.Preferably, two parts are fixed with respect to saw body, saw base plate and/or saw blade, and preferably, and two parts are with respect to saw body, saw base plate, fixing guard section and/or removable each other.
In one embodiment, when on primary importance, one or more parts of protector and/or protector surround substantially, around and/or surround the cut edge at least of saw blade.This cut edge is usually along the periphery or the circumferential edges setting of saw blade, and preferably along the circumferential edges setting of saw blade.
When using saw with cut workpiece and/or when protector in primary importance with when moving between the second place at least, usually the whole cut edge of saw blade or at least the cut edge the part on workpiece substantially by one or more parts of protector and/or protector cover, surround, around and/or encirclement.
In one embodiment, saw and be such type, promptly saw blade is rotatably installed with respect to saw body.Usually saw is power saw, and is preferably the power Hand saw, such as annular saw, small-sized annular saw, rise-and-fall-saw (plunge saw) etc.The small-sized annular saw of mentioning among this paper is light relatively, makes the user use the saw of single hand portability and operable type thus.
Usually the primary importance of protector is corresponding to memory location, not use location, home etc.On this primary importance, prevented the part at least of the cut edge of saw blade, preferably whole cut edge contact object, workpiece or user.
Usually one or more moveable parts of protector are when moving to the said second place at least from primary importance, with respect to the base plate of saw body, saw blade, saw body and/or such as one or more other parts of the protector of the standing part of protector movably, rotatably, pivotly and/or telescopically move.
In one embodiment, protector comprises that at least one fixes or immovable part.Preferably, protector comprises that at least two are fixed or immovable part with respect to saw body, base plate and/or saw blade.The moveable part of protector is removable with respect to the standing part of protector usually.
In one embodiment, along with protector moves towards the said second place at least from primary importance, opening clearance or space between at least two adjacent parts of protector.Preferably, open between the standing part of the second portion of protector and protector in this gap or space.In use, this gap or space allow the part of the cut edge of saw blade to contact with workpiece.
In one embodiment, when primary importance moves to the second place, the second portion of protector moves on the direction away from the standing part of protector.Preferably, on primary importance, the edge of moveable part or end are against the edge or the end of standing part; Overlapping with it or adjacent; On the second place, the edge of moveable part or end away from the said edge of said fixing point or end move, or move to and be spaced from certain distance.
In one embodiment, the first of protector moves within the standing part of protector or the standing part at protector, and/or in the fixing part with respect to saw body, saw blade and/or saw base plate of protector, moves.
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 to more with another moveable part or the standing part of protector.
In one embodiment, second moveable part is mounted to the base plate of saw slidably, and in use, when protector moved between the primary importance and the second place, second moveable part was removable with respect to first moveable part.Preferably, second guard section is engaged to first guard section pivotly.
Preferably, one in the base plate or second guard section is provided with protuberance or pin, and this protuberance or pin are slidably mounted in the groove that is arranged in the base plate or second guard section another.
Preferably; Second moveable part is moving with respect to saw blade substantially in the radial direction; And/or move along the axis of the longitudinal axis of the support portion that is parallel to saw substantially, base plate or base plate, this support portion, substrate plate or base plate in use can be positioned on the surface of workpiece.
In one embodiment, in use, through with saw body and/or the saw blade that is associated with saw body towards the base plate of workpiece, saw body and/or against movement of objects, protector moves towards the said second place at least from primary importance.In use, saw body and/or saw blade can move with respect to workpiece slidably, point-blank, rotatably and/or pivotly.
In one embodiment, in use, through at least partly bringing to workpiece of protector contacted or supporting object, protector moves towards the said second place at least from primary importance.
In one embodiment, protector and/or its one or more parts are flexibly setovered 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 was on any position, saw blade can both move in this groove or conduit.In this arrangement, can start saw, wherein saw blade begins to move with respect to saw body, and on primary importance, guard covers is the cut edge of saw blade at least simultaneously.
In one embodiment, saw comprises saw body and base plate device, bracing or strutting arrangement or base plate.In use, the base plate device is seated in or is positioned on the surface of workpiece usually.Further, in use, the part at least of base plate device is substantially between at least one part and workpiece of protector usually.
Preferably, saw comprise the last guard section fixing with respect to saw body, with respect to saw body movably go up guard section, the following guard section fixed with respect to base plate and movably descend guard section with respect to base plate.
When the second portion at least of protector moves between the primary importance and the second place, move with respect to bracing or strutting arrangement, base supports device or base plate usually.
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 with respect to saw body of protector can be installed on bracing or strutting arrangement, base supports device or the base plate movably.
In one embodiment, the part fixing with respect 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 said fixing part of protector is mounted to the rear end of bracing or strutting arrangement pivotly.The part of protector can be fixed but removable with respect to bracing or strutting arrangement, base supports device or base plate with respect to saw body thus.
In one embodiment, bracing or strutting arrangement, base supports device or base plate comprise groove, groove, recess etc., and this groove, groove, recess etc. limit window, and in use, at least a portion of saw blade can be passed this window with cut workpiece.
In one embodiment, in use, saw body is around some pivots and/or rotation, so that saw blade belt is extremely contacted with workpiece.Usually the point that sawing pivots is centered on is 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, the point that saw body pivots and/or rotation is centered on usually is positioned at substantially to be located towards the back of bracing or strutting arrangement, base supports device or base plate.
In one embodiment, at least a portion of bracing or strutting arrangement, base supports device or base plate forms the part of protector, and preferably, forms the lower part of protector.
In one embodiment, in use, at least one in the moveable part of protector is slidably mounted on the part of bracing or strutting arrangement, base supports device or base plate.
In a preferred embodiment, along with saw body moves towards the use location with respect to workpiece, at least two adjacent parts of protector slide separately substantially.Usually, in use, at least one in two parts 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 the 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 limit at least one the moving with respect to the adjacent part of saw blade, saw body, fixed protection part and/or protector in the moveable part of protector usually.
Usually, the one or more moveable parts of depth of cut indicating device through limiting protector are regulated and/or the depth of cut of definite saw blade in workpiece towards moving of the second place at least.
Usually, a part of depth of cut device preventing or restriction protector is with respect to the slip of adjacent part.
In one embodiment, saw body comprises handle portion, grip device etc., to allow user's grasping or to hold saw.
In one embodiment, saw and/or protector comprise locking system.Usually, this locking system prevents that substantially protector from moving to the second place from primary importance.
Preferably, be provided with elastic biasing means so that protector and/or saw body are biased to primary importance from the second place.
In one embodiment, protector comprises the dust draw-out device.Usually, this dust draw-out device comprises the hole in the one or more parts that are limited to protector.On the primary importance and/or the second place at least, this hole preferably is positioned at forward position, front portion or the cut edge adjacent with saw body and/or protector substantially.Further, use hose arrangement, vacuum unit etc. to extract dust and/or fragment usually through this hole.
Preferably, this dust draw-out device is associated with the second removable guard section.
The leading edge of saw blade is the point that the edge of saw blade in use contacts with workpiece, and is to produce the dust of maximum and the position of fragment when on workpiece, using saw blade.Because this position is in the front of saw blade and/or the position tangent with saw blade usually, conventional annular saw protection department does not cover this position, particularly when when the second place moves at least.Thus, the arrangement like the part of protector disclosed herein allows more effective dust and/or fragment to extract.
Preferably, guard section towards interior edge at bending or camber substantially in shape, when protector is in primary importance, to form the cardinal principle circular edge of housing or covering part.Further preferably; Removable go up guard section towards outer edge and fixing following guard section in shape substantially with fixing on guard section complementary;, move in the guard section on fixing with fixing following guard section at bending or camber in shape such as for example to allow the in use removable guard section of going up.
In another aspect of the present invention, the power saw with protector is provided.This power saw has the power set that are used to drive unit supply power.This drive unit in use drives the rotation of saw blade.For example, power set can comprise civil power power supply, battery power, rechargeable battery power, solar power etc.Drive unit can comprise motor etc.Between power set, drive unit and saw blade, suitable transmission device, mechanical linkages etc. can be set.
In second aspect of the present invention; The protector that is used to saw is provided; Wherein this protector comprises at least three parts, and on primary importance, these at least three parts cover at least a portion of saw blade; At least one part of said protector is in primary importance and removable with respect to saw body and/or saw blade between the second place at least, exposes the more most of of saw blade thus than on primary importance the time.
In the third aspect of the invention, a kind of saw that comprises protector is provided.
In another aspect of the present invention, the method for the protector that a kind of use is used to saw is provided, said method comprises in use protector is positioned at the step on the primary importance adjacent with workpiece; And protector moved to the second place from primary importance, cause in use first moveable part of protector and the step that at least the second moveable part moves with respect to workpiece, the saw body that is associated with protector and/or saw blade thus.
According to independent aspect of the present invention; A kind of saw is provided; It comprises main part, be arranged as permission in use by the handle portion of user's grasping and can be positioned on the base plate that is used in use supporting saw on the surface of the work; Said main part is mounted to said base plate movably, does not move with respect to base plate between cutting position and second cutting position first to allow main part, and wherein said base plate, main part and handle portion are arranged so that first not on the cutting position; The longitudinal axis of handle portion is parallel to the longitudinal axis of base plate substantially; And on second cutting position, the longitudinal axis of handle is raised up to and makes progress substantially or horizontal position, perhaps with respect to the uneven substantially axis of the longitudinal axis of base plate.
When from enable position or when cutting position does not move to cutting position; Handle portion above position below base plate or parallel moves to or substantially the handle that moves substantially with the instrument of prior art of angled position move on the contrary and the centre position of user's wrist when allowing to maintain the grasping member part.Thus, the arrangement with respect to base plate and tool body of handle portion of the present invention provides improved ergonomic efficiency, and by user's single hand tool.The position that on handle portion, is used for the trigger switch of instrument also allows the finger manipulation instrument by user's single hand (same hand of grasping member part just).
Preferably, tool body is mounted to the rear end (just near the end of the handle portion of instrument) of base plate pivotly.This has reduced the possibility of instrument " rollback " in use.
Description of drawings
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 second cutting position;
Fig. 4 a-4d show protector respectively from Fig. 4 a first not cutting position move to the side view of saw and protector in the process of second cutting position among Fig. 4 d;
Fig. 5 shows the three-dimensional view of the left-hand side of saw and protector respectively; And
Fig. 6 shows the three-dimensional view of the left-hand side of protector.
The specific embodiment
The embodiment illustration of hereinafter according to the power saw that is used for of the present invention, hand electric annular saw especially, the example of protection department.This protection department is arranged as on memory location or primary importance the cut edge that covers the saw blade that is engaged to saw at least, and protection department is provided with at least two moveable parts, in the cutting position or the second place, is exposed to user's zone with the restriction saw blade.
Two removable guard sections are partly mobile with respect to the fixed protection of protection department, and the cut edge of saw blade contacts with workpiece on the second place to allow.When on the direction downward substantially with respect to workpiece, using saw, this arrangement advantageous particularly because it allows in workpiece, to cut tightening substantially on the straight axis, and/or allows more safely on workpiece, to carry out the cut-in type sawing.
At first, show the three-dimensional view of hand-held circle power saw 2 referring to Fig. 1.This saw comprises main body or housing 4, and it surrounds the drive unit (not shown) of electro-motor form.Saw 2 among this embodiment is usually through mains-supplied, but those skilled in the art can understand, and this saw can also be battery-powered comparably or by any other suitable electric installation power supply.In use, this motor drives the rotation of saw blade 6.
Saw shown in Fig. 1 is in first " safety " position, and wherein the cut edge of saw blade 6 is centered on by protection department 8, to prevent from the side the cut edge near saw blade.This arrangement guarantees that the cut edge of saw blade 6 can not all of a sudden contact with object or user's part.
In shown arrangement, on primary importance, saw blade 6 can activated (just saw can switch to " unlatching " state, to allow saw blade with respect to housing 4 rotations) and still keep being centered on fully by protector 8 in the cut edge of saw blade simultaneously.
Usually push/spur on/off switch or trigger 12 by the handle portion 10 and common the using of user's one grasped housing 4, and will saw actuating with forefinger on the other hand.In this embodiment, trigger 12 is positioned on the lower surface of handle portion.
Saw 2 in this example also is equipped with base plate or base plate 22.Base plate 22 in use is positioned on the surface of the workpiece that will cut, and in sawing process, provides support for saw.Base plate can be equipped with one or more tables, chi, scale etc. alternatively, with angle, the degree of depth and/or the length of auxiliary more accurate cutting and/or measurement cutting.Base plate 22 can also cooperate with the track (not shown), and saw can movably or be fixedly mounted on this track, to increase the accuracy of sawing.As hereinafter will be in greater detail such, the housing 4 of saw moves with respect to base plate 22 usually pivotly, with allow housing 4 and saw blade 6 from first not cutting position move to second cutting position.
Protection department 8 among this embodiment is divided into four sections or part 14,16,18,20.In explanation, two in the guard section are called main guard section or go up guard section 14,16, because in use they cover the major part of saw blade 6, and are generally the top of saw blade; Two in the guard section are called auxiliary guard section or following guard section 18,20, because in use, with respect to major part or top 14,16, their cover the smaller portions of saw blade 6, and are set to cover the lower part of saw blade usually.
In use, last guard section 14 is bonded to housing 4 and handle 12, and with respect to housing 4 and handle 12 fixing (just keeping static with respect to housing 4 and handle 12).The base end 9 of last guard section 14 is mounted to the rear end 11 (just near the end of handle 12) of base plate 22 pivotly via pivotal pin 24; With permission in use, housing 4, last guard section 14 and handle 12 move towards base plate 22 (and thus towards 22 workpiece on it of base plate) pivotly.Last guard section 14 is called the fixed protection part, because it is fixed with respect to instrument/saw body.
Following guard section 20 combines and is fixed to base plate 22 (just keeping static with respect to base plate), and the rear end 11 of common and base plate is adjacent to fix.Following protection department 20 projects upwards towards housing 4 from base plate 22.In this embodiment, the longitudinal axis of guard section 20 is parallel to the longitudinal axis of base plate 22 substantially.Following guard section 20 is called the fixed protection part, because it is fixed with respect to base plate.Along with last guard section 14 moves towards base plate 22, following guard section 20 guard section 14 inner slide move up.
Adjacent with the front end of last guard section 16 13 and with front end 15 adjacents of following guard section 18, via pivotal pin 17, last guard section 16 is mounted to down guard section 18 (front end is generally the end of shrinking away from theshell body 4 farthest) pivotly.Thus, last guard section 16 is removable with housing 4, following guard section 18 and base plate 22 with respect to last guard section 14.In this embodiment, like what hereinafter discuss in more detail, last guard section 16 is arranged as in use along with housing 4 and guard section 14 move towards base plate 22, and slip in last guard section 14.Last guard section 16 is called removable guard section, because it is removable with respect to instrument/saw body, following guard section 18 and base plate 22.
Following guard section 18 is mounted to base plate 22 slidably, and removable on the direction of the longitudinal axis that is parallel to base plate 22 substantially.More particularly, guard section 18 when cutting position does not move to second cutting position from first instantly, following guard section 18 be away from the rear end 11 of base plate 22, moves towards the front end 19 of base plate 22.Base plate 22 has the surperficial from it flange portion 21 that projects upwards towards housing 4.Elongated slot 36 is limited in the flange portion 21, makes the longitudinal axis of groove 36 be parallel to the longitudinal axis of base plate 22 substantially.A part or the other protruding member of pivotal pin 17 are slidably mounted in the groove 36, move to guide down the slip of guard section 18 between the primary importance and the second place.Following guard section 18 is called removable guard section, because it is removable with respect to instrument/saw body, following guard section 16 and base plate 22.
In use, when the user will saw from first shown in Fig. 1 safety or cutting position does not move to second cutting or the sawing position shown in Fig. 3 and 4d, saw housing 4 with last guard section 14 around pin 24 towards base plate 22 pivots.Lift with respect to workpiece and base plate 22 and realize that this moves by user's grasping member 10 and with it.This causes guard section 16 upwards to slide in that last guard section 14 is inboard, and causes down guard section 18 away from guard section 20 down and slide (just descending guard section 18 to move towards the front end 19 of base plate 22).First not on the cutting position, the rear end 23 of following guard section 18 encapsulates saw blade against the front end 25 of guard section 20 down thus substantially.Along with following guard section 18 moves to second cutting position, form the gap between the end 23 and 25 of following guard section 18,20, allow cast-cutting saw slice to be cut in the workpiece thus.When guard section 18,20 separated, the user had the good sight line that can watch saw blade, and the cut edge of having protected saw blade substantially simultaneously is not by approaching from the side on base plate 22.In addition; When moving to the second place; Mobile in last guard section 14 of following guard section 20 and last guard section 16 provides compact safeguard structure, and this safeguard structure has the little visual outer surface region of user of the outer surface region more visual than the user of the safeguard structure on the primary importance.
The further details how protection department 8 moves towards second cutting position or use location has been shown among Fig. 2.In Fig. 2, show protection department 8 and be in a partly opened position, wherein the cutting part of saw blade 26 or cut edge extend through the hole in the base plate 22, and extend to the workpiece (not shown).Partially open and mean such fact, promptly descend guard section 18 on away from the direction A of following guard section 20 to front slide, this allow to go up guard section 16 substantially on direction B in last guard section 14 inner slide.These move is owing to rising when handle 10 (not shown among Fig. 2) and guard section 14 causes in the rotatory force that when base plate 22 pivots, is applied by the user on the direction C around pivotal pin 24 substantially.The base end 25 of following guard section 20 remains fixed on the base plate, but along with last guard section 14 moves down towards base plate 22, the upper end (not shown) of guard section 20 is in last guard section 14 medial movement.In this arrangement; From primary importance all positions towards move second use location; The cut edge on base plate 22 26 of saw blade 8 all keeps being covered by protection department, and wherein in this example, saw blade 8 exposes maximum amount in the use location.
Illustrated among Fig. 3 and sawed 2 second use location or cutting position.Here can see handle 10 is raised up at utmost away from base plate 22, wherein go up guard section 14 and pivot around pivotal pin 24, and its lower limb 31 be against the upper surface of base plate 22.Last guard section 16 and two following guard sections 18,20 are positioned at the inside of guard section 14 in fact, and saw blade 8 passes base plate 22 and projects at utmost and project in the workpiece (not shown).
With handle 10 from first not cutting position move to second cutting position; Will the position of handle be moved to for operation saw 2 favourable orientations than ergonomic; So that the user can apply more power as requested, and more control thus to saw, particularly when on the direction in level substantially when workpiece promotes to saw; And/or when selecting depth of cut; Wherein, first not in the cutting position, the longitudinal axis of handle is positioned on the minimum substantially position longitudinal axis that (handle be in the position near base plate 22 on) is parallel to base plate 22 substantially; In second cutting position, the longitudinal axis of handle is positioned on the position that makes progress or go up most (handle is on base plate 22 position farthest).This is favourable with respect to traditional annular saw, and in traditional annular saw, the pivotal point of saw is towards the location, front portion of base plate, and the user must be with the position of handle below top position is pulled to downwards, with the operation saw thus.
Depth of cut (just saw blade projects to the degree of depth under the base plate 22) can be selected through using degree of depth device 28.Degree of depth device 28 can be provided with and limit the bar (not shown), and it limits goes up guard section 16 and can limit the mobile of protection department 8 thus in the amount of last guard section 14 medial movement, and limits saw blade 6 thus and can project to the degree of depth under the base plate 22.This degree of depth device stopper can also be placed on down on the slide mechanism of guard section 18 with respect to base plate 22, to have identical effect.Moving of protection department, and saw mobile can control as a whole thus by interlock switch 30.This interlock switch 30 in this example is towards the location, top of housing 4, between housing and last guard section 14.Interlock switch is usually at first by user's thumb-activated, and allows moving of protection department.If the offhand cutting of user and do not depress interlock switch, even activated saw blade 6 by trigger 12, saw 2 also still remains on first home with saw protection department 8.
Fig. 4 a-4d shows all places that protection department 8 moves between the full cutting position to second shown in Fig. 4 d at first home shown in the 4a.Can see that in Fig. 4 a even saw blade activated, saw blade 6 also receives protection fully, can move up to pushing interlock switch 30 (not shown) and removable guard section here.Fig. 4 a-4d shows along with around pivotal pin 24 housing 4 and guard section 14 being rotated by the user towards base plate 22, and how guard section 14-20 relative to each other moves.Fig. 4 b-4c shows down guard section 18,20 and how to slide separately, and how goes up guard section 16 in last guard section 14 medial movement, exposes the part of saw blade thus, the workpiece below cutting base plate 22.Fig. 4 a and 4d show the cutting movement scope that runs through up to the complete degree of depth, and how the section that is positioned on the base plate 22 with saw blade covers.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 movably guard section springs back to first home, in this first home saw blade fully by by protection department 8 around.
Fig. 5 shows the right-hand side of the saw 2 on first home, and wherein handle 10 is orientated and is basically parallel to base plate 22.Can see dust extraction aperture 32 in this view.This hole 32 is positioned at front end 13 adjacents with last guard section 16, and optimally be placed as in this example all the time with saw blade at first contact a part of adjacent of (in cutting process, producing maximum dusts thus) with workpiece.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, put tangent substantially place continuous drawing dust and fragment.The wall in hole 32 and/or the inner surface of going up guard section 16 can have and be limited to one or more groove and/or conduit, with control upwards the air of guard section 16 flow, and thus will be to the extraction optimization of the dust and the fragment of its vicinity.Usually, the vacuum unit that will be equipped with flexible pipe is engaged to hole 32, so that suction to be provided, so that dust and/or fragment are removed to the position away from saw blade.
Fig. 6 illustrates in greater detail the left-hand side or the rear portion of protection department 8.Can see that dust extraction aperture 32 is diamond shape substantially.With the position and the shape optimization in hole 32, with dirt collection maximization, and need not consider various saw blade types and the size that to use with saw interchangeably.Last protection department 16 also has the prominent features portion 34 in pivotal point 17 fronts of last protection department 16 and following guard section 18.This prominent features portion guarantee to go up guard section 16 in its moving process with base plate 22 keeping parallelisms, and prevent that it from blocking.In this example, a torsion spring (not shown) is arranged, it biases to first closed position with protection department 8.This figure also shows additional maintenance segment or plate 38; It is added on the rear end adjacent with protection department 8, runs through to move with the scope of cutting operation and run through saw and all has stability and accuracy from moving of second cutting position to the first home to guarantee cutting head (housing 4, saw blade 6 and guard section 14,20).
Pivot or the rotation that should be noted that a guard section or go up guard section 14 move drive another guard section or down the linearity of guard section 18 move.This is in the front of last guard section 14 with respect to the rotation moving direction of pivotal pin 24 because of following guard section 18.

Claims (26)

1. protector that is used to saw, in use, the first of said protector is in primary importance and removable with respect to saw body and/or saw blade between the second place at least; In said primary importance; At least a portion of said saw blade is substantially by said guard covers, and in the said second place at least, at least a portion of saw blade is exposed; It is characterized in that said protector comprises in use with respect to said saw body and/or saw blade second portion at least movably.
2. protector according to claim 1 is characterized in that, in use, said at least the second guard section is removable with respect to said first guard section.
3. protector according to claim 1; It is characterized in that; On said primary importance; Said first guard section and said at least the second guard section form continuous substantially housing or covering part, when guard section being moved to the said second place at least, in housing or covering part, produce the gap.
4. protector according to claim 1; It is characterized in that; In use; Said first guard section and said at least the second guard section are removable with respect to one or more standing parts, saw blade and/or the saw base plate of the saw body of saw, and/or removable with respect to one or more parts of said protector, and one or more parts of said protector are fixed with respect to saw body, saw blade and/or saw base plate.
5. protector according to claim 1 is characterized in that said protector comprises at least four parts; Two said parts are fixed with respect to saw body, saw blade and/or saw base plate, and two said parts are with respect to saw body, saw blade, saw base plate, fixing guard section and/or removable each other.
6. protector according to claim 1; It is characterized in that, on said primary importance, the end or the removable guard section of edge of fixed protection part; Adjacent with it or in an overlapping the relation; On the said second place at least, the said end of fixed protection part or edge and removable guard section are moved apart, to form the gap betwixt.
7. protector according to claim 1; It is characterized in that; The said first removable guard section and/or the said at least the second removable guard section when moving to the said second place at least from said primary importance, with respect to one or more other parts of the base plate of saw body, saw blade, saw body and/or protection department slidably, rotatably, pivotly and/or telescopically move.
8. protector according to claim 1; It is characterized in that; In use; When moving to the said second place at least from said primary importance; The first removable guard section and/or at least the second removable guard section are in the standing part of said protector, standing part at said protector; Or moving with respect to the overlapping relation of the increase of the standing part of said protector, and/or in the part fixing of said protector, fixing part with respect to saw body, saw blade and/or saw base plate at said protector with respect to saw body, saw blade and/or saw base plate, or to move with respect to the overlapping relation of the increase of the part fixing with respect to saw body, saw blade and/or saw base plate of said protector.
9. protector according to claim 1 is characterized in that, in use, when said primary importance moves to the said second place, the rotation of said first guard section is moved and driven the linear substantially of said at least the second guard section and move.
10. protector according to claim 9 is characterized in that, in use, second guard section is mounted to the base plate of saw slidably, and in use, said second guard section is engaged to said first guard section pivotly.
11. protector according to claim 10; It is characterized in that; One in the base plate or second guard section is provided with protuberance or pin, and said protuberance or pin are slidably mounted in the groove that is arranged in said base plate or said second guard section another.
12. protector according to claim 1 is characterized in that, said protector is arranged on the saw, and said saw comprises saw body and is used in use said saw being supported on the base plate on the workpiece.
13. protector according to claim 12; It is characterized in that, said saw comprise the last guard section fixing with respect to said saw body, with respect to said saw body movably go up guard section, the following guard section fixed with respect to said base plate and movably descend guard section with respect to said base plate.
14. protector according to claim 12 is characterized in that, via with said guard section in a pivoting device that is associated, said saw body moves with respect to said base plate pivotly.
15. protector according to claim 14 is characterized in that, said saw body is mounted to the rear end of said base plate pivotly.
16. protector according to claim 12; It is characterized in that; In use; Part through the saw blade that makes said saw body and/or be associated with said saw body moves towards base plate and/or workpiece pivotly, and said protector moves to the said second place at least from said primary importance.
17. protector according to claim 16; It is characterized in that; Said saw body comprises handle portion, and said handle portion be arranged as with said saw when said primary importance moves to the said second place, on the direction that makes progress, move away from said base plate.
18. protector according to claim 17; It is characterized in that; Said base plate, main part and said handle portion are arranged so that on said primary importance, the longitudinal axis of said handle portion is parallel to the longitudinal axis of said base plate substantially, and on the said second place; The longitudinal axis of said handle portion is raised up to and makes progress substantially or horizontal position, perhaps with respect to the uneven position of the longitudinal axis of said base plate.
19. protector according to claim 1 is characterized in that, said protector comprises the depth of cut indicating device.
20. protector according to claim 19; It is characterized in that; One in the standing part of said protector comprises said depth of cut indicating device; And in use, said depth of cut indicating device prevents, limits and/or limit at least one the moving with respect to the adjacent part of saw blade, saw body, fixed protection part and/or said protector in the moveable part of said protector.
21. protector according to claim 1 is characterized in that, saw and/or said protector comprise locking system, are used in use preventing that said protector from moving to the said second place from said primary importance.
22. protector according to claim 1 is characterized in that, is provided with elastic biasing means, in use said protector is biased to primary importance from the second place.
23. protector according to claim 1 is characterized in that, said protector comprises the dust draw-out device.
24. protector according to claim 23 is characterized in that, said dust draw-out device comprises the hole in use adjacent with forward position, front portion or the cut edge of saw blade and/or the protector guard section of qualification.
25. protector according to claim 24 is characterized in that, said dust draw-out device is arranged on movably going up on the guard section of said protector.
26. the method for the protector that a use is used to saw, said method comprise in use protector is positioned at the step on the primary importance adjacent with workpiece; And said protector moved to the second place from said primary importance, the step that first moveable part and at least the second moveable part that causes said protector in use thus moves with respect to workpiece, saw body and/or the saw blade that is associated with said protector.
CN201180015694.0A 2010-02-26 2011-02-23 Guard means for a saw and method of use thereof Active CN102811845B (en)

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

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CN102811845B CN102811845B (en) 2015-04-15

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CN104029181A (en) * 2013-03-04 2014-09-10 罗伯特·博世有限公司 Mobile phone machine tool
CN104827375A (en) * 2015-05-10 2015-08-12 重庆市炙热科技发展有限公司 Mechanical device capable of processing stone panel dustlessly and using method of mechanical device
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
CN109664382A (en) * 2018-12-13 2019-04-23 尧章铭 A kind of waddy notcher
CN110382164A (en) * 2016-11-16 2019-10-25 易维佳知识产权控股有限公司 Suction unit

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GB201102368D0 (en) * 2011-02-10 2011-03-30 7Rdd Ltd Powered circular saw and method of use thereof

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CN104029181A (en) * 2013-03-04 2014-09-10 罗伯特·博世有限公司 Mobile phone machine tool
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CN110382164A (en) * 2016-11-16 2019-10-25 易维佳知识产权控股有限公司 Suction unit
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
CN109664382A (en) * 2018-12-13 2019-04-23 尧章铭 A kind of waddy notcher
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

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WO2011104538A1 (en) 2011-09-01
GB201003262D0 (en) 2010-04-14

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