CN101096115B - Platform type disk sawing machine - Google Patents
Platform type disk sawing machine Download PDFInfo
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- CN101096115B CN101096115B CN2007101028822A CN200710102882A CN101096115B CN 101096115 B CN101096115 B CN 101096115B CN 2007101028822 A CN2007101028822 A CN 2007101028822A CN 200710102882 A CN200710102882 A CN 200710102882A CN 101096115 B CN101096115 B CN 101096115B
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Abstract
The present invention relates to a kind of bench circular sawing machines, wherein in block mechanism, previous block component is pressed into the side of safety guard, to which it becomes moving resistance, in the presence of prevent the case where safety guard is from smooth rotation, wherein the block mechanism is used to rotate relative to tool guard and lock the safety guard that cutter is opened and closed in the upper dead center position of tool units for cutting devices and cannot open. And in the present invention, safety guard smooth rotation can be made block component and side abut against. Block component (41) is separated into block support portion (42) and block main part (43), second loading device (43b) is installed therebetween, the loading force being loaded into the limiting unit (43a) of block main part (43) is made to be less than the first loading force of top dead-centre locking mechanism.
Description
Technical field
The present invention relates to a kind of bench circular sawing machine that tool units for cutting devices is moved up and down and the blank that is fixed on the workbench is cut off operation.
Background technology
This bench circular sawing machine has the workbench that is used for fixing blank and is supported on tool units for cutting devices on this workbench in mode moving up and down, and tool units for cutting devices has the saw blade of the circle that is rotated by motor.
The approximately half scope of saw blade upside is covered by tool guard, and the periphery that is similar to half scope downwards from the outstanding saw blade downside of tool guard is covered by safety guard.The knee-action interlock of this safety guard and this tool units for cutting devices and opening and closing.That is, when tool units for cutting devices moved down, this safety guard was slowly opened and is exposed saw blade, thereby the exposed portions serve of saw blade can be cut off operation by being pressed on the blank.When tool units for cutting devices was moved up, the safety guard of opening slowly cut out, and the periphery of saw blade is covered by this safety guard.Therefore, if when tool units for cutting devices arrives the mobile end position in top (upper dead center position), be in following state: almost all cover by safety guard from the periphery of approximate half scope of downside of the outstanding saw blade of safety guard.
In this bench circular sawing machine, based on the requirement of European standard and be provided with the block member, this block member is used for the closed condition of locked secure cover when tool units for cutting devices is in upper dead center position.
In the past, as the technology relevant with the block mechanism of this safety guard, known for example had flat 5-No. 104504 disclosed technology of communique of TOHKEMY.Figure 11 illustrates tool units for cutting devices 70 with existing like this block mechanism 60.This tool units for cutting devices 70 has electro-motor 71 as drive source in the rear side of tool guard 72.Electro-motor 71 is installed on the gear head (gear head) 73 of the rear side setting of tool guard 72.On gear head 73, be provided with the handle portion 74 that the operator grips.
Gear head 73 is provided with working beam 75, and this working beam 75 is rotatable around its central shaft.On this working beam 75, unlocking lever 76 is installed.The front of unlocking lever 76 extends to the side of handle portion 74.When the inclination that unlocks shown in the hollow arrow of this unlocking lever 76 of operation in figure is tiltedly moved, then working beam 75 is in the drawings towards rotation counterclockwise, thus, the top dead-centre locking mechanism of tool units for cutting devices 70 unlocks, thereby this tool units for cutting devices 70 is moved down.
The block mechanism 60 that is used for safety guard 65 is locked on the closed position is the mechanism that has adopted above-mentioned top dead-centre locking mechanism, working beam 75 is provided with the block member 61 that constitutes block mechanism 60, this block member 61 be in to the side-prominent state of unlocking lever 76 opposite.The front of this block member 61 is bent into the L font and forms the 61a into restriction portion.Enter into safety guard 65 to the path of opening side shifting by the 61a of this restriction portion, open, thus safety guard 65 is locked on the closed position thereby limit this safety guard 65.When unlocking lever 76 direction of arrow in figure being unlocked operation, as mentioned above, the top dead-centre locking mechanism is disengaged locking, and, the 61a of restriction portion of block member 61 withdraws from from the path that safety guard 65 moves, thereby this safety guard 65 becomes openable state, thus, and the action interlock that this safety guard 65 and tool units for cutting devices 70 move down and slowly opening.
Patent documentation 1:JP spy opens flat 5-No. 104504 communiques
The existing block mechanism 60 that constitutes like this has following problem.That is, the locking component of top dead-centre locking mechanism utilizes spring and loads to locking direction, and operational lock relieving rod 76 is to unlocking the direction tilting action by overcoming this loading force, thus, this top dead-centre locking mechanism unlocks, and the block mechanism 60 of safety guard 65 is disengaged locking.Thus, owing to block parts 61 also are subjected to indirectly with the effect of the locking component in the top dead-centre locking mechanism to the spring of locking direction loading, so this block member 61 loads to the locking side by the spring loading force of above-mentioned top dead-centre locking mechanism.
On the other hand, the block mechanism 60 of safety guard 65 is such structure, promptly, under the state that makes tool units for cutting devices 70 in the upper dead center position standby (safety guard 65 closed conditions), make the 61a of restriction portion of block member 61 enter into the mobile route that this opens direction, limit this safety guard 20 and move to opening direction with respect to the opening side end 65a of safety guard 65.Therefore, before safety guard 65 complete closing state, if the operator stops the operation that unlocks of unlocking lever 76, then can produce such situation, that is: as shown in the figure, the 61a of restriction portion of block member 61 is pressed against on the sidepiece of safety guard 65 by the spring loading force of top dead-centre locking mechanism.As mentioned above, on block member 61, acting on the spring loading force of the top dead-centre locking mechanism of tool units for cutting devices 70, setting this spring loading force stronger in order to ensure the action reliably of above-mentioned top dead-centre locking mechanism.Thus, owing to effect, and safety guard 65 distortion occur or damage such problem by the pressing force that is pressed in the block member 61 on the sidepiece (the spring loading force of top dead-centre locking mechanism).
Summary of the invention
The present invention proposes in view of the above problems, its purpose is to provide the block mechanism of the safety guard on a kind of bench circular sawing machine, in the block mechanism that the top dead-centre locking mechanism interlock with tool units for cutting devices moves, the former of operation opportunity of unlocking lever thereby when making the block member be pressed against the sidepiece of safety guard, also can prevent the distortion of this safety guard, prevent that the surface from producing scar.
Thus, the present invention is the described bench circular sawing machine of following each technical scheme.
The present invention's first technical scheme relates to a kind of bench circular sawing machine, comprising: workbench, and it is used for fixing blank; Tool units for cutting devices, it is supported on this workbench, and can move up and down with respect to this workbench, this tool units for cutting devices includes safety guard, the knee-action interlock of this safety guard and this tool units for cutting devices and carry out on-off action with respect to cutting knife, it is characterized in that, this bench circular sawing machine comprises: the top dead-centre locking mechanism, when it arrives upper dead center position at above-mentioned tool units for cutting devices, locking component moves to the locking side by the loading force of first charger, thereby this tool units for cutting devices is locked on the upper dead center position; Block mechanism, when it arrives upper dead center position at above-mentioned tool units for cutting devices, above-mentioned safety guard is locked on the closed position, this block mechanism includes the block member, this block member enters into the side end of opening of above-mentioned safety guard and opens in the path that direction moves towards above-mentioned safety guard, limit this safety guard and move to opening direction, this block member comprises: the block support portion, and its first charger by above-mentioned top dead-centre locking mechanism is biased to constrained side; The block main part, it is can be supported on this block support portion to the mode of constrained side opposition side displacement, and be biased to constrained side by second charger, the side end of opening of this block main part and above-mentioned safety guard is connected, limit this safety guard and move to opening direction.
The present invention's second technical scheme is on the basis of first technical scheme, it is characterized in that, upper support has the elastic rubbery body with elastic force in the block support portion, and this elastic rubbery body can be to the displacement of constrained side opposition side, this elastic rubbery body is used as above-mentioned block main part, and is also used as second charger.
The present invention's the 3rd technical scheme is on the basis of first technical scheme, it is characterized in that, on the block support portion, be supported with the block main part via fulcrum, this block main part can rotate, and the mobile route with respect to above-mentioned safety guard can be advanced and retreat, and the compression spring is installed as second charger between this block main part and above-mentioned block support portion.
According to the described bench circular sawing machine of first technical scheme, be positioned at tool units for cutting devices under the state of upper dead center position, this tool units for cutting devices is locked in upper dead center position by the top dead-centre locking mechanism.The locking component of top dead-centre locking mechanism is biased to the locking side by first charger.
Also have, be positioned at tool units for cutting devices under the state of upper dead center position, the block member of block mechanism enters into to opening the path that direction moves with respect to the opening side end of safety guard, thus, the restriction safety guard moves to opening direction, and this safety guard is locked in the closed position.
The block member has block support portion and block main part, the block support portion is biased to constrained side (entering into the direction of safety guard to the path of opening side shifting) by first charger of above-mentioned top dead-centre locking mechanism, and the block main part can be biased to constrained side to the displacement of constrained side opposition side and by second charger with respect to the block support portion.This block main part is moving under the state of constrained side, and open end and block main part butt by safety guard are limited in this safety guard to opening side shifting, therefore become the state that this safety guard is locked in the closed position.
Like this, the block main part is supported on by first charger and is biased on the block support portion of constrained side, and can be to the displacement of constrained side opposition side, and be biased to constrained side equally by second charger, first charger and second charger act on this block main part simultaneously thus, as a result the block main part to the loading force of restriction portion less than first charger.The loading force (first charger) to the locking side is not to the loading force of block main part to constrained side in the top dead-centre locking mechanism of tool units for cutting devices like this, but becomes this block main part is biased to constrained side with littler loading force state.
Thus, even first charger is set at the reliable lock function of guaranteeing the top dead-centre locking mechanism greatly, when the sidepiece of block main part and safety guard does not interfere simultaneously, to this block main part to the loading force of constrained side loading force less than first charger, so can make the block main part to the pressing force (to the moving resistance of safety guard) of safety guard side less than in the past, thus, can not cause safety guard distortion or damage etc.
According to the described bench circular sawing machine of second technical scheme, by in the end of opening as the elastic rubbery body butt safety guard of block main part, thereby this safety guard is locked in the closed position.
Before safety guard cuts out fully, even move to constrained side by first charger in block mechanism, when the block main part is pushed the sidepiece of safety guard, elastic rubbery body as the block main part is also pushed with the loading force (the total loading force between the loading force of the loading force of first charger and second charger) that is weaker than first charger, so can prevent the safety guard damage.
According to the described bench circular sawing machine of the 3rd technical scheme, by on the block support portion, rotatably supporting the block main part via fulcrum, the block main part that is biased to constrained side by the compression spring as second charger is connected to the side end of opening of safety guard, thereby this safety guard is locked into the closed position.
Before safety guard cuts out fully, the block member moves to constrained side by first charger, when the block main part is pressed into the sidepiece of safety guard, the block main part is also pushed with the loading force (the total loading force between the loading force of the loading force of first charger and second charger) that is weaker than first charger, therefore can prevent the safety guard damage.
Description of drawings
Fig. 1 is the side view of bench circular sawing machine with block mechanism of first embodiment of the invention.The figure shows the state that tool units for cutting devices is positioned at upper dead center position.
Fig. 2 is the side view of tool units for cutting devices of bench circular sawing machine with block mechanism of first embodiment of the invention, the figure shows to make tool units for cutting devices be moved down into the roughly state of lower dead point position.
Fig. 3 is the figure of the observed tool units for cutting devices of arrow (3) direction from Fig. 1.
Fig. 4 is the cutaway view of locking component periphery along the cutaway view of (4) among Fig. 1-(4) line.The figure shows the state that locking component moves to the locking side.
The cutaway view of this locking component periphery of Fig. 5 the figure shows the state that locking component moves to the side that unlocks.
Fig. 6 is the enlarged drawing of (6) portion among Fig. 3, is the longitudinal sectional view of block member.
Fig. 7 is the side view of tool units for cutting devices with block mechanism of first embodiment, the state that the restriction portion of expression block main part and the side of safety guard connect.
Fig. 8 is the figure of the observed tool units for cutting devices of (8) direction of arrow from Fig. 7.In the figure, the side of the restriction portion of expression block main part and safety guard connects and is displaced to the state of constrained side opposition side with respect to the block support portion.
Fig. 9 is the figure from the tool units for cutting devices of the observed block mechanism with second embodiment of the invention of operator's side (arrow Fig. 1 (3) direction).
Figure 10 is the figure of the block member of observed second embodiment of arrow from Fig. 9 (10) direction.
Figure 11 is from the observed figure with tool units for cutting devices of existing block mechanism of operator's side.In the figure, the state that connects of the side of expression block member and safety guard.
The specific embodiment
Below, based on Fig. 1～Figure 10 embodiments of the present invention are described.Fig. 1 represents the bench circular sawing machine 1 of present embodiment.This bench circular sawing machine 1 has: workbench 2, and it is blank W fixedly; Tool units for cutting devices 10, it is supported on this workbench 2 and with respect to this workbench 2 and can moves up and down.Workbench 2 is supported on the upper surface of base 3 in the mode that can horizontally rotate.Upper surface side at this workbench 2 disposes location guardrail (fence) 4, and this location guardrail is used for blank W is positioned.This location guardrail 4 is installed in base 3 sides, and has small gap between the upper surface of workbench 2, and the gap is little to get final product to interfering only otherwise with the upper surface of workbench 2.
Upward be provided with support arm 6 at the rear portion of workbench 2 (in Fig. 1, being the right part) across the action support portion 5 that tilts.Be supported with the tilting action base portion 10a of tool units for cutting devices 10 on the leading section of this support arm 6 by knee-action fulcrum 7, the tilting action base portion 10a of this tool units for cutting devices 10 can carry out tilting action up and down.The action support portion 5 that tilts has such structure, that is: the 5b of tilting action portion combines with fixed part 5a on being fixed on workbench 2 rear portions by tilting action fulcrum 5c, and the 5b of tilting action portion can rotate.The 5b of tilting action portion is provided with above-mentioned support arm 6, and support arm 6 is in the state that extends upward.By this action support portion 5 that tilts, tool units for cutting devices 10 can be to the left or right side (in Fig. 1, being the direction vertical) with paper carry out tilting action, thus, can carry out so-called inclined cut.Compression spring 8 is installed between the tilting action base portion 10a side of tool units for cutting devices 10 and support arm 6.By this compression spring 8, tool units for cutting devices 10 is biased to the upper dead center position side.
In Fig. 2 and Fig. 3, represent tool units for cutting devices 10 separately.Tool units for cutting devices 10 has CD-ROM drive motor 11 and the cutting knife 12 of the circle that is rotated by this CD-ROM drive motor.Half scope of cutting knife 12 upsides is covered by tool guard 13.One of this tool guard 13 is provided with above-mentioned tilting action base portion 10a on distolateral integratedly.Rear side (being right flank among Fig. 3) at this tool guard 13 is provided with gear head 14 integratedly.Above-mentioned CD-ROM drive motor 11 is installed on this gear head 14.In addition, gear head 14 is provided with the handle portion 15 of ring-type.The front of this handle portion 15 (being the left part in Fig. 1 and Fig. 2) becomes the handle part 15a that the user grips.
The periphery of approximate half scope of cutting knife 12 downsides is covered by the safety guard 20 of open and close type.The section of this safety guard 20 is the U font, covers the surface and the back side of cutting knife 12 along the approximate half cycle of the periphery of cutting knife 12, and with supported around the spire 16 rotatable modes on tool guard 13 fronts of being arranged on.The spire 16 of this tool guard 13 is approximate coaxial with the main shaft that cutting knife 12 is installed (omitting diagram).Rotate to opening direction (in Fig. 1, being clockwise direction) around spire 16 by safety guard 20, thereby the periphery that slowly exposes cutting knife 12, otherwise, center on spire 16 to closing direction (being counterclockwise) rotation by safety guard 20 in Fig. 1, thereby slowly cover the periphery of cutting knife.
This safety guard 20 loads to closing direction by the elastic force of the extension spring between the spire 16 that is installed in safety guard 20 and tool guard 13 (omitting diagram).Safety guard 20 overcomes this elastic force and is opened, and on the other hand, utilizes this elastic force and the whole downside periphery of the cutting knife 12 that exposes from tool guard 13 is fully closed.
The leading section 21c of working beam 21 extend to spire 16 near.At the inboard of safety guard 20 and near spire 16, be provided with engaging board 20a.The leading section 21c of working beam 21 engages board 20a and connects with this.When tool units for cutting devices 10 carries out tilting action up and down, to follow in this, working beam 21 carries out tilting action around fulcrum 21a up and down with certain path.Being accompanied by tool units for cutting devices 10 moves down from upper dead center position, working beam 21 is tilting action downwards, thereby its leading section 21c is subjected to displacement around spire 16, thus, engaging board 20a is pushed towards opening direction, thereby safety guard 20 is slowly opened.Fig. 2 represents the state that tool units for cutting devices 10 arrives lower dead point position and safety guard 20 is opened fully.
When tool units for cutting devices 10 from the shift position, below when upper dead center position moves up, by working beam 21 tilting action upward, thereby its leading section 21c returning around spire 16.Thus, the become safety guard that can rotate to closing direction 20 returns to closing direction by elastic force.
The upper dead center position of tool units for cutting devices 10 is by 30 lockings of top dead-centre locking mechanism.On the gear head 14 that is arranged at tool guard 13 rear side, working beam 31 is with can be around the mode of its central shaft rotation supported.This working beam 31 is along configuration between the back side of tool guard 13 and the handle portion 15.Stretch out from the front and the back of gear head 14 at the both ends of this working beam 31.The leading section side of working beam 31 extends to the side of handle portion 15.Unlocking lever 32 is installed on the leading section of this working beam 31.This unlocking lever 32 is fixed on the leading section of working beam 31 by hold-down screw 33,33.As shown in Figure 3, unlocking lever 32 stretches out from tool guard 13 sides all side direction opposition sides in it of handle portion 15, and this front of stretching out extends near the handle part 15a of this handle portion 15.Therefore, the state of handle part 15a that the operator can keep controlling with one hand handle portion 15 is constant, and with this unlocking lever 32 of finger-tip operated.
On the leading section of working beam 31, except above-mentioned unlocking lever 32, block member 41 is installed also.Narrate in the back about this block member 41.On the rearward end of the working beam that stretches out later 31 of gear head 14, working plate 34 is installed by hold-down screw 35,35.This working plate 34 is the state that stretches out to the side from the rearward end of working beam 31, and its outstanding front extends near the tilting action base portion 10a of tool guard 13.
Locking component (stop pin) 36 is installed on the leading section of working plate 34.The one distolateral minor diameter part 36a that is provided with of this locking component 36, this minor diameter part 36a are inserted into angling among the 34a of access slot portion of being provided with on working plate 34, maintain locking component 36 on the leading section of this working plate 34.Therefore, locking component 36 can be along angling the 34a of access slot portion to move, and, can not be on the leading section of working plate 34 to the state lower support of its axial displacement.Locking component 36 is being across being arranged between the 14a of wall portion, the 14b of gear head 14, and supporting to the mode of its axial displacement.
In addition, as Fig. 4 and shown in Figure 5, between the 14c of wall portion of gear head 14 and working plate 34, torsion spring 37 is installed.Make working plate 34 be biased to the locking side by this torsion spring 37.By making working plate 34 be biased to the locking side by torsion spring 37, thus working beam 31 biasing along clockwise direction in Fig. 4 and Fig. 5, and thus, unlocking lever 32 latched position lateral deviation shown in the solid line in Fig. 3 is put.Therefore, this unlocking lever 32 latched position shown in the solid line from Fig. 3 realizes by resisting this torsion spring 37 to the operation that unlocks of the latch-release position side shown in the double dot dash line.
By making working plate 34 be biased to the locking side,, locking component 36 locks side (in Fig. 4 and Fig. 5, being left) thereby being biased to by torsion spring 37.
The leading section 36b of locking component 36 extend to above-mentioned working beam 21 near.Here, the tilting action base portion 10a of tool guard 13 is provided with lock hole 10b, and this lock hole 10b has the diameter that can insert locking component 36 leading section 36b.Be positioned at tool units for cutting devices 10 under the state of upper dead center position, this lock hole 10b is positioned on the guiding groove section 21b consistent location with working beam 21.Be not positioned at tool units for cutting devices 10 under the state (state that it is moved down) of upper dead center position, lock hole 10b is suitably to be set on the position among this tilting action base portion 10a with the inconsistent mode of guiding groove section 21b.When tool units for cutting devices 10 is positioned at upper dead center position and lock hole 10b when consistent with guiding groove section 21b, the leading section 36b of locking component 36 is inserted in lock hole 10b and the guiding groove section 21b by the loading force of above-mentioned torsion spring 37.This state as shown in Figure 4.
Under the leading section 36b of locking component 36 is inserted into state among guiding groove section 21b and the lock hole 10b, because the relative displacement of the tilting action base portion 10a of 21 pairs of tool guards 13 of restraint of labour bar, so restriction tool units for cutting devices 10 moves down, this result is that this tool units for cutting devices 10 is locked on the upper dead center position.Locking component 36 is biased to the locking side by the loading force of torsion spring 37, and the leading section 36b that remains locking component 36 thus is inserted into the state that guides among slot part 21b and the lock hole 10b, thereby keeps this top dead-centre lock-out state.Therefore, torsion spring 37 is equivalent to a mode of first charger described in the present invention.
By in the operational lock relieving rod 32 to Fig. 3 with the latch-release position side shown in the double dot dash line, thereby remove the top dead-centre lock-out state of tool units for cutting devices 10, thus, tool units for cutting devices 10 is moved down.If the opposing torsion spring 37 and with in the operational lock relieving rod 32 to Fig. 3 with the latch-release side shown in the double dot dash line, then working beam 31 rotation in the counterclockwise direction in Fig. 3 and Fig. 4, thus, working plate 34 in Fig. 4 in the counterclockwise direction (direction unlocks) carry out tilting action.If working plate 34 opposing torsion springs 37 and to unlocking the direction tilting action, then move on Lock Part 36 right side in Fig. 4, thus, its leading section 36b extracts from the guiding groove section 21b of the lock hole 10b of tilting action base portion 10a and working beam 21.This state (top dead-centre latch-release state) as shown in Figure 5.In this top dead-centre latch-release state, because working beam 21 can carry out relative displacement up and down with respect to the tilting action base portion 10a of tool guard 13, so tool units for cutting devices 10 is moved up and down.
From the process that upper dead center position moves down, as mentioned above, lock hole 10b and guiding groove section 21b are inconsistent, and guiding groove section 21b is positioned at the position of leaving from the leading section 36b of locking component 36 at tool units for cutting devices 10.Thus, in case when the latch-release operation that tool units for cutting devices 10 is stopped unlocking lever 32 from the process that upper dead center position moves down, though can make working plate 34 turn back to latched position from latch-release position shown in Figure 5 by torsion spring (first charger) 37, but as mentioned above, because the guiding groove section 21b of working beam 21 is positioned at the position of leaving from the leading section 36b of locking component 36, so the leading section 36b of locking component 36 is not inserted among the guiding groove section 21b, because of loading force and these working beam 21 butts of torsion spring 37.When keeping this butt state constant and when making tool units for cutting devices 10 turn back to upper dead center position, the leading section 36b of locking component 36, finally is inserted in the guiding groove section 21b with the sliding mode relative displacement as shown in Figure 4 with respect to working beam 21.
Then, the block member 41 that is arranged on working beam 31 leading sections is described.This block member 41 constitutes block mechanism 40, this block mechanism is used for the closed condition of locked secure cover 20, this block member 41 is worked with top dead-centre locking mechanism 30 interlocks, and this top dead-centre locking mechanism 30 is used for above-mentioned tool units for cutting devices 10 is locked onto upper dead center position.In the present embodiment, particularly has the obvious characteristic that did not in the past have aspect this block mechanism 40 about block member 41.The details of the block member 41 of present embodiment as shown in Figure 6.
Installation base portion side at unlocking lever 32 is equipped with block support portion 42, and wherein this unlocking lever 32 constitutes the top dead-centre locking mechanism 30 of tool units for cutting devices 10.In the present embodiment, the copper coin of band plate-like is fixed on the working beam 31 with above-mentioned hold-down screw 33,33 near the heart therein, the part that to stretch out to a side from working beam 31 is as above-mentioned unlocking lever 32, and the part that will stretch out to opposite side is as this block support portion 42.Thereby block support portion 42 is that center and unlocking lever 32 are integratedly to mutual rightabout tilting action with working beam 31.
Block main part 43 is installed on block support portion 42.In the present embodiment, use elastic rubbery body as this block main part 43.Be positioned at tool units for cutting devices 10 under the state of upper dead center position and closed safe cover 20, this block main part 43 is positioned at and opens direction the place ahead or its side with respect to the side end 20b that opens of safety guard 20.In this position, by operation that above-mentioned unlocking lever 32 is unlocked, thereby this block main part 43 withdraws from from safety guard 20 is opened the mobile route of direction, otherwise, by making unlocking lever 32 turn back to the locking side, thereby block main part 43 enters into this mobile route.
This block main part 43 has: the 43a of restriction portion, and its mobile route with respect to safety guard 20 is advanced and retreat; Elastic portion 43b, it is used for this restriction portion 43 is applied the elastic force of advance and retreat direction.In this embodiment, with the top of above-mentioned hold-down screw 33,33 common fastening this elastic portion 43b, thereby this block main part 43 is supported along the back side of block support portion 42.This block support portion 42 and block main part 43 constitute block member 41.
As Fig. 3 and shown in Figure 6 under the state that does not apply any external force, block main part 43 remains the state that is positioned at 42 back sides, block support portion by the loading force of elastic portion 43b.With respect to this, as shown in Figure 6, external force (reaction force) P as if the 43a of restriction portion being applied the hollow arrow direction then should overcome the loading force of elastic portion 43b and be displaced to right side (direction of leaving from block support portion 42) by the 43a of restriction portion.The state of displacement as among Fig. 3 with shown in the double dot dash line and shown in Figure 8.If remove external force P, then the loading force by elastic portion 43b turns back on the position that connects with 42 back sides, block support portion this elastomer 43b and the 43a of restriction portion.Therefore, elastic portion 43b is equivalent to an embodiment of second charger that the present invention puts down in writing.
Bench circular sawing machine 1 according to the present embodiment that as above constitutes, as shown in Figure 1, be positioned at tool units for cutting devices 10 under the state of upper dead center position, the leading section 36b of the locking component 36 in the top dead-centre locking mechanism 30 remains the state that is inserted among guiding groove section 21b and the lock hole 10b by the loading force of torsion spring 37 (first charger), thus, this tool units for cutting devices 10 is locked on the upper dead center position.
In addition, be positioned at tool units for cutting devices 10 under the state of upper dead center position, then turn back to the state that safety guard 20 cuts out the periphery of cutting knife 12 fully.The closed condition of this safety guard 20 is by 40 lockings of block mechanism.Promptly, with respect to safety guard 20 open side end 20b, the 43a of restriction portion of the block main part 43 in the block mechanism 40 enters into the mobile route that it opens direction, thus, limit this and open side end 20b to opening moving of direction, thereby safety guard 20 is locked on the closed position.
When operational lock relieving rod 32 and tilting action unlocking during the position shown in the double dot dash line in Fig. 3, working beam 31 is resisted torsion springs 37 and is rotated to the side that unlocks (being counter clockwise direction in Fig. 3～Fig. 6), thus, the leading section 36b of locking component 36 extracts from gathering sill 21b and lock hole 10b, thereby remove the top dead-centre lock-out state of tool units for cutting devices 10, therefore, this tool units for cutting devices 10 can move down.
On the other hand, when resistant function in the torsion spring 37 (first charger) of working beam 31 and with unlocking lever 41 when unlocking the position side operation, shown in double dot dash line among Fig. 3, block member 41 moves to the position side that unlocks, thus, the 43a of restriction portion of block main part 43 withdraws to the path of opening side shifting from safety guard 20, and this safety guard 20 can move to opening direction.
Like this, when resistant function in the torsion spring 37 (first charger) of working beam 31 and with unlocking lever 41 when unlocking the side operation, top dead-centre locking mechanism 30 is disengaged locking, and block mechanism 40 is disengaged locking, thereby tool units for cutting devices 10 is moved down.When tool units for cutting devices 10 is moved down, interlock therewith, safety guard 20 is slowly opened and is exposed cutting knife 12.
As mentioned above, the loading force that is applied to the torsion spring 37 (first charger) on the working beam 31 affacts on the block main part 43 of block mechanism 40 indirectly.Therefore, the loading force of the 43a of restriction portion of block main part 43 by first charger enters into safety guard 20 to opening the path that direction moves, otherwise, overcome the loading force of first charger and from this mobile route, withdraw from.
Therefore, be not positioned at tool units for cutting devices 10 under the state of upper dead center position, safety guard 20 is opened, and the 43a of restriction portion of block main part 43 is positioned at the side of safety guard 20 relatively.Therefore, if unlocking lever 32 is not operated to the side that unlocks in this stage, then the side (back side) of the 43a of restriction portion of block main part 43 and safety guard 20 connects.If in the past, directly act as the pressing force of block member owing to act on the loading force of first charger of working beam 31 to safety guard 20 sides, so it becomes the bigger moving resistance of safety guard, cause this safety guard to deform or sustain damage, for example produce scar etc. at its back side.
But, block mechanism 40 according to present embodiment, the 43a of restriction portion that connects with safety guard 20 sides is supported on the block support portion 42 in movable mode via elastic portion 43b (second charger), and this block support portion 42 directly is subjected to acting on the effect of the loading force of the torsion spring 37 (first charger) on the working beam 31.
Therefore, act on the loading force of the 43a of restriction portion, because the result that the loading force of the loading force of torsion spring 37 and elastic portion 43b acts on simultaneously becomes the loading force littler than the loading force of torsion spring 37.Thus, shown in Fig. 7 and 8, when the side of 43a of restriction portion and safety guard 20 connects, receive its reaction force P, with respect to block support portion 42 to the direction relative displacement of leaving from its side, consequently to the 43a of this restriction portion loading force of former state effect torsion spring 37 (first charger) not, ear is connecting less than this loading force and the side of safety guard 20, so safety guard 20 was subjected in the past like that, and the moving resistance of size can not damage and open and close.
Like this, block mechanism 40 according to present embodiment, the 43a of restriction portion of block main part 43 is to connect than the little loading force of first charger of top dead-centre locking mechanism 30 and the side of safety guard 20, so unlocking lever 32 is not being operated under the state of the side that unlocks, even tool units for cutting devices 10 turns back to upper dead center position, safety guard 20 also can move to closing direction and turn back to the closed position.
Embodiment at above explanation can be implemented various changes.For example, illustration such structure (first embodiment), that is: the block member 41 of block mechanism 40 is equipped with block main part 43 (elastic rubbery body) with respect to block support portion 42, with the part of this elastic rubbery body as the elastic portion 43b that is equivalent to second charger, with rest parts as the 43a of restriction portion, but, also can replace such structure, and the structure of the block member 51 that constitutes with different component as Fig. 9 and employing shown in Figure 10.Do not need the structure and the member that change for relative first embodiment, utilize identical Reference numeral, and omit its explanation.
The block member 51 of the block mechanism 50 of this second embodiment has: block support portion 54, and itself and unlocking lever 32 are wholely set, and the torsion spring 37 (first charger) by top dead-centre locking mechanism 30 is biased to constrained side; Block main part 52, it is supported on the working beam 31 in rotating mode.Compression spring 53 is installed as second charger between block support portion 54 and block main part 52.
The rotation front of block main part 52 is bent into the L font and forms the 52a into restriction portion.As shown in Figure 9, the 52a of this restriction portion enters into the mobile route of safety guard 20, open side end 20b with respect to it and be positioned on its restriction site of opening direction the place ahead, thereby this safety guard 20 is locked in the closed position.The holding section 52b and the unlocking lever 32 that are provided with by the top at block main part 52 connect, and the restriction site (entering into the distance of the mobile route of safety guard 20) of the 52a of restriction portion is limited.
By unlocking lever 32 is operated the side that unlocks, thereby the 52a of restriction portion of block main part 52 withdraws from from the mobile route of safety guard 20, thus, allows to open safety guard 20.
In addition, move down and open under the state of safety guard 20 from upper dead center position at tool units for cutting devices 10, unlocking lever 32 is not being operated under the state of the side that unlocks, shown in double dot dash line among Fig. 9, the 52a of restriction portion of block main part 52 withdraws from from the mobile route of safety guard 20 and is positioned at the constrained side opposition side, and connects with the side of this safety guard 20.
The block mechanism 50 of second embodiment by such formation is equipped with compression spring 53 as second charger between block support portion 54 and block main part 52, make the 52a of restriction portion be biased to constrained side by this compression spring 53.In addition, block support portion 54 is fixed on the working beam 31, and directly be applied with loading force as the torsion spring 37 of first charger, so it is same with first embodiment, act on simultaneously by first charger and second charger, and to the loading force of the 52a of restriction portion effect less than first charger.Therefore, move down from upper dead center position and open the unlocking during operation of the relieving rod 32 that unlocks under the state of safety guard 20 at tool units for cutting devices 10, to connect less than in the past loading force (pressing force) side with safety guard 20, this safety guard 20 can not be subjected to bigger moving resistance and be closed the 52a of restriction portion of block main part 52 yet.
In the embodiment described above, illustration torsion spring 37 as first charger in the top dead-centre locking mechanism 30, still, can utilize various forms of mechanisms to first charger that locking direction loads as being used for Lock Part 36.For example, also can become this structure, that is: the compression spring is installed between the 14b of wall portion of gear head 14 and Lock Part 36, locking component 36 be loaded to locking direction by this compression spring as first charger.According to this structure, make working beam 31 to locking sideway swivel biasing by the compression spring, at this moment, by using above-mentioned illustrative block mechanism 40 (50), and can access identical action effect.
Claims (3)
1. bench circular sawing machine comprises: workbench, and it is used for fixing blank; Tool units for cutting devices, it is supported on this workbench, and can move up and down with respect to this workbench, this tool units for cutting devices includes safety guard, the knee-action interlock of this safety guard and this tool units for cutting devices and carry out on-off action with respect to cutting knife is characterized in that this bench circular sawing machine comprises:
The top dead-centre locking mechanism, when it arrived upper dead center position at above-mentioned tool units for cutting devices, locking component moved to the locking side by the loading force of first charger, thereby this tool units for cutting devices is locked on the upper dead center position; Block mechanism when it arrives upper dead center position at above-mentioned tool units for cutting devices, is locked in above-mentioned safety guard on the closed position,
This block mechanism includes the block member, and this block member enters into the side end of opening of above-mentioned safety guard and opens in the path that direction moves towards above-mentioned safety guard, and limit this safety guard and move to opening direction,
This block member comprises: the block support portion, and its first charger by above-mentioned top dead-centre locking mechanism is biased to constrained side; The block main part, it to be can being supported on to the mode of constrained side opposition side displacement on this block support portion, and is biased to constrained side by second charger,
The side end of opening of this block main part and above-mentioned safety guard is connected, limit this safety guard and move to opening direction.
2. bench circular sawing machine as claimed in claim 1 is characterized in that,
Upper support has the elastic rubbery body with elastic force in the block support portion, and this elastic rubbery body can be to the displacement of constrained side opposition side, and this elastic rubbery body is used as above-mentioned block main part, and is also used as second charger.
3. bench circular sawing machine as claimed in claim 1 is characterized in that,
On the block support portion, be supported with the block main part via fulcrum, this block main part can rotate, and the mobile route with respect to above-mentioned safety guard can be advanced and retreat, and the compression spring is installed as second charger between this block main part and above-mentioned block support portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-179488 | 2006-06-29 | ||
| JP2006179488A JP4795139B2 (en) | 2006-06-29 | 2006-06-29 | Tabletop circular saw |
| JP2006179488 | 2006-06-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101096115A CN101096115A (en) | 2008-01-02 |
| CN101096115B true CN101096115B (en) | 2010-10-20 |
Family
ID=39010292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101028822A Expired - Fee Related CN101096115B (en) | 2006-06-29 | 2007-05-11 | Platform type disk sawing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4795139B2 (en) |
| CN (1) | CN101096115B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009171194A (en) | 2008-01-16 | 2009-07-30 | Oki Electric Ind Co Ltd | Packet sampling method, packet sampling device, network monitoring device |
| JP5465405B2 (en) * | 2008-09-04 | 2014-04-09 | 株式会社マキタ | Tabletop cutting machine |
| CN102615344B (en) * | 2011-01-30 | 2014-04-16 | 苏州宝时得电动工具有限公司 | Cutting machine |
| JP6847651B2 (en) * | 2016-09-01 | 2021-03-24 | 株式会社マキタ | Portable cutting machine |
| JP6938179B2 (en) * | 2017-03-21 | 2021-09-22 | 株式会社マキタ | Desktop cutting machine |
| JP7299111B2 (en) * | 2019-09-03 | 2023-06-27 | 株式会社マキタ | portable cutting machine |
| CN111906376B (en) * | 2020-07-14 | 2025-06-10 | 张家港市创基机械设备制造有限公司 | Machine head locking device capable of enabling saw blade on electric saw to be replaced conveniently |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2036893U (en) * | 1988-10-26 | 1989-05-03 | 山东省博兴县机械厂 | Multiblade bidirection stone-sawing machine with diamond saw disk |
| CN2075129U (en) * | 1990-10-20 | 1991-04-17 | 平江县三阳大理石厂 | Saw machine with circular disc for diamond |
| CN2312117Y (en) * | 1997-08-04 | 1999-03-31 | 许俊崴 | Electric circular saw |
| CN1259892A (en) * | 1997-06-09 | 2000-07-12 | 伊利克特拉贝库姆股份公司 | Transportable bench circular saw |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3253655B2 (en) * | 1991-10-18 | 2002-02-04 | 株式会社マキタ | Tabletop circular saw machine |
| JP3553267B2 (en) * | 1996-05-08 | 2004-08-11 | 株式会社マキタ | Tabletop circular saw machine |
| JP2001315075A (en) * | 2000-05-10 | 2001-11-13 | Makita Corp | Power tool |
-
2006
- 2006-06-29 JP JP2006179488A patent/JP4795139B2/en not_active Expired - Fee Related
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2007
- 2007-05-11 CN CN2007101028822A patent/CN101096115B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2036893U (en) * | 1988-10-26 | 1989-05-03 | 山东省博兴县机械厂 | Multiblade bidirection stone-sawing machine with diamond saw disk |
| CN2075129U (en) * | 1990-10-20 | 1991-04-17 | 平江县三阳大理石厂 | Saw machine with circular disc for diamond |
| CN1259892A (en) * | 1997-06-09 | 2000-07-12 | 伊利克特拉贝库姆股份公司 | Transportable bench circular saw |
| CN2312117Y (en) * | 1997-08-04 | 1999-03-31 | 许俊崴 | Electric circular saw |
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| Title |
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| JP特开平5-104504A 1993.04.27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4795139B2 (en) | 2011-10-19 |
| CN101096115A (en) | 2008-01-02 |
| JP2008006703A (en) | 2008-01-17 |
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