JP7258574B2 - Sliding plate and portable electric processing machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sliding plate and a portable electric machine, and more particularly to a sliding plate that can be attached to and detached from the bottom surface of a base of a portable electric machine and a portable electric machine to which the sliding plate is attached.

Conventionally, a portable electric processing machine (for example, a portable circular saw) consists of a base and a processing machine body (for example, a circular saw body) equipped with a rotatable rotary cutting tool (for example, a circular saw blade) protruding from the lower surface of the base. etc.) are already known. In this portable electric processing machine, the lower surface of the base is pressed against the upper surface of the material to be cut such as wood, and while the rotating blade is rotated in this pressed state, the processing machine main body slides against the upper surface of the material to be cut. It is configured such that the material to be cut can be cut by (sliding). Patent Document 1 below discloses a portable electric processing machine 401 in which a sliding plate 470 having a sliding contact sheet 475 attached to a lower surface 471a is attached to a lower surface 402b of a base 402 (FIG. 38). reference). As a result, the slidability between the upper surface of the material to be cut and the lower surface 471a of the sliding plate 470 (corresponding to the lower surface 402b of the base 402) can be enhanced by the sliding contact sheet 475. FIG. Therefore, the sliding operation of sliding the processing machine main body 403 against the upper surface of the material to be cut can be performed smoothly. Therefore, workability of cutting the material to be cut can be improved.

JP 2017-205891 A

However, in the technique of Patent Document 1 described above, the sliding plate 470 is attached to the lower surface 402b of the base 402 by inserting a screw (not shown) into the sliding plate 470 from the lower surface 471a side and screwing the inserted screw into the base. 402 by tightening it on the lower surface 402b side (see FIG. 39). Therefore, it is also necessary to prevent the head of the screw from protruding from the lower surface 471 a of the sliding plate 470 and to sufficiently engage the inside of the sliding plate 470 . Therefore, it was necessary to ensure the thickness of the sliding plate 470 . As a result, the height position of the processing machine main body 403 (the height position of the rotary blade tool) with respect to the upper surface of the material to be cut is raised, so that the depth of cut of the rotary blade tool 405 may be insufficient.

SUMMARY OF THE INVENTION It is an object of the present invention to solve such problems and to provide a sliding plate and a sliding plate which can secure a sufficient cutting depth of a rotary cutting tool even when attached to the lower surface of a base of a portable electric machine. Another object of the present invention is to provide a portable electric machine with a sliding plate.

According to one feature of the present disclosure, the sliding plate is detachable from the lower surface of the base of the portable electric machine. The sliding plate is provided with a wall extending upward at a position facing the outer shell of the base. A fastening member for fastening the outer shell of the base and the wall is provided between the outer shell of the base and the wall.

Therefore, the outer shell of the base and the wall of the sliding plate are fastened via the fastening member. That is, a sliding plate is attached to the base. When the sliding plate is attached in this way, it is not necessary to ensure the thickness of the sliding plate in this attachment unlike the prior art. Therefore, since the height position of the processing machine main body (the height position of the rotary blade) with respect to the upper surface of the material to be cut is not raised, the cutting depth of the rotary blade can be sufficiently secured.

According to another feature of the present disclosure, the wall portion is fastened to the outer shell of the base within the thickness region of the base by tightening a small screw as a fastening member into a threaded hole provided in the outer shell of the base.

Therefore, since the small screw is screwed into the screw hole of the outer shell of the base, the screw head of the small screw can be compactly fastened so that it does not protrude upward or downward from the thickness region of the base.

According to another feature of the present disclosure, the sliding plate is provided with an upwardly extending wall opposite the outer shell of the base. The sliding plate is fixed to the base by the fastening member pressing the wall portion outward from the inside.

Therefore, the base and the wall portion of the sliding plate are stretched through the fastening member. Therefore, relative movement between the base and the sliding plate in the direction from the inside to the outside is restricted, and as a result, the sliding plate is attached to the base. When the sliding plate is attached in this way, it is not necessary to ensure the thickness of the sliding plate in this attachment unlike the prior art. Therefore, since the height position of the processing machine main body (the height position of the rotary blade) with respect to the upper surface of the material to be cut is not raised, the cutting depth of the rotary blade can be sufficiently secured.

According to another feature of the present disclosure, the sliding plate is fixed to the base by adjusting the amount of push of the fastening member by tightening or loosening the screw.

Therefore, it is possible to finely adjust the pressing force of the fastening member. Therefore, it is possible to reliably attach the sliding plate.

According to another feature of the present disclosure, the screw tightening or loosening direction is in the plane direction of the base surface of the base.

Therefore, the operation of loosening or tightening the fastening members necessary for attaching the sliding plate to the base is performed from the side or the upper side. Therefore, it is possible to improve the workability of attaching the sliding plate.

According to another feature of the present disclosure, the wall is formed with an insertion hole for inserting a screw tightening or loosening tool.

Therefore, the operation of loosening or tightening the fastening member necessary for attaching the sliding plate to the base is the operation through the insertion hole. Therefore, it is possible to further improve the workability of attaching the sliding plate.

According to another feature of the present disclosure, when the screw is loosened, the tip of the fastening member presses against the rim of the insertion hole, thereby fixing the sliding plate to the base.

Therefore, the tip of the fastening member evenly presses the edge of the insertion hole of the wall portion in the circumferential direction. Therefore, it is possible to simplify the configuration for pressing the tip of the fastening member against the wall portion while ensuring workability of the insertion hole. That is, it is possible to eliminate the need for a separate member or the like for pressing.

According to another feature of the present disclosure, tightening or loosening of the screw causes the wedging action of the advancing and retracting wedge member to press the fastening member against the wall.

Therefore, the sliding plate can be stably attached to the base with a simple structure such as tightening of a single screw.

According to another feature of the present disclosure, the spring bias forces the fastening member against the wall.

Therefore, the sliding plate can be attached to the base without the need for operations such as tightening and loosening screws.

According to another aspect of the present disclosure, a portable electric machine with a slide plate attached.

Therefore, it is possible to provide a portable electric machine having the effects of the sliding plate.

1 is a perspective view of a portable circular saw according to a first embodiment; FIG. FIG. 2 is a plan view of the portable circular saw of FIG. 1; Fig. 2 is a front view of the portable circular saw of Fig. 1; FIG. 2 is a right side view of the portable circular saw of FIG. 1; Fig. 2 is a rear view of the portable circular saw of Fig. 1; Fig. 2 is a left side view of the portable circular saw of Fig. 1; FIG. 5 is a cross-sectional view taken along line VII-VII of FIG. 4; 2 is an exploded view of FIG. 1; FIG. Fig. 2 is a front perspective view of the portable circular saw of Fig. 1, showing a state before the sliding plate is attached; Fig. 10 is a perspective view from the right side of the portable circular saw of Fig. 9, showing a state in which it has been turned upside down and placed on the ground; FIG. 11 is a rear perspective view of the portable circular saw of FIG. 10; Figure 10 is an exploded perspective view of the base of Figure 9; 3 is a cross-sectional view taken along the line XIII-XIII of FIG. 2; FIG. 3 is a cross-sectional view along line XIV-XIV of FIG. 2; FIG. It is a plane schematic diagram explaining attachment of the sliding plate in 1st Embodiment. FIG. 16 is a schematic plan view for explaining a step subsequent to FIG. 15; FIG. 17 is a schematic vertical cross-sectional view of FIG. 16; FIG. 18 is a schematic plan view for explaining a step subsequent to FIG. 17; FIG. 19 is a schematic vertical cross-sectional view of FIG. 18; It is a plane schematic diagram explaining attachment of the sliding plate in 2nd Embodiment. FIG. 21 is a schematic plan view for explaining a step subsequent to FIG. 20; FIG. 22 is a schematic plan view for explaining a step subsequent to FIG. 21; FIG. 23 is a schematic vertical cross-sectional view of FIG. 22; FIG. 23 is a schematic vertical cross-sectional view for explaining the next step of FIG. 22; FIG. 25 is a schematic vertical cross-sectional view of FIG. 24; It is a plane schematic diagram explaining attachment of the slide plate in 3rd Embodiment. FIG. 27 is a schematic vertical cross-sectional view of FIG. 26; FIG. 27 is a schematic plan view for explaining the next step of FIG. 26; FIG. 29 is a schematic vertical cross-sectional view of FIG. 28; FIG. 30 is a schematic vertical cross-sectional view for explaining the next step of FIG. 29; FIG. 31 is a schematic plan view for explaining a step subsequent to FIG. 30; FIG. 32 is a schematic vertical cross-sectional view of FIG. 31; It is a plane schematic diagram explaining attachment of the sliding plate in 4th Embodiment. FIG. 34 is a schematic plan view for explaining a step subsequent to FIG. 33; FIG. 35 is a schematic vertical cross-sectional view of FIG. 34; FIG. 35 is a schematic plan view for explaining a step subsequent to FIG. 34; FIG. 37 is a schematic vertical cross-sectional view of FIG. 36; FIG. 2 is a right side view of a portable circular saw according to the prior art, showing a state where a slide plate is attached to the base; 39 is a perspective view of the sliding plate of FIG. 38; FIG.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated using drawing.
(First embodiment)
First, a first embodiment of the present invention will be described with reference to FIGS. 1-19. In the following description, "portable circular saw 1" will be described as an example of "portable electric processing machine". Further, in the following description, up, down, front, back, left, and right indicate directions up, down, front, back, left, and right shown in the above-described figures. That is, the forward direction indicates the cutting direction (advancing direction) of the portable circular saw 1 .

First, the portable circular saw 1 and the sliding plate 70 attached to the lower surface 2b of the base 2 of the portable circular saw 1 will be individually described.

First, the portable circular saw 1 will be described with reference to FIGS. 1 to 15. FIG. This portable circular saw 1 includes a substantially rectangular plate-shaped base 2 that is pressed against the upper surface of a material to be cut (for example, wood) to be cut when performing a cutting operation, and an electric motor ( It is composed of a circular saw body 3 having a disk-shaped saw blade 5 that is rotationally driven by a brushless motor 4 (see FIGS. 1 to 8).

Stoppers 60 are formed at the front edge 2c and the rear edge 2d of the base surface 2a (upper surface) of the base 2 (see FIG. 15). A pair of left and right screw holes 61 are formed in the rear wall surface 2g of the base 2 (see FIGS. 8 and 15). Fastening members 62 are respectively screwed into the pair of right and left screw holes 61 . A screw member having a head 63 with a hexagonal hole 63a is used as the fastening member 62 .

On the other hand, the circular saw body 3 is composed of a motor housing 6 containing an electric motor 4 , a handle housing 7 fastened to the motor housing 6 , and a gear housing 8 fastened to the handle housing 7 . Both ends of the drive shaft 9 of the electric motor 4 housed in the motor housing 6 are supported by bearings 10 and 11 (see FIG. 7). A bearing 10 on the right side of the drive shaft 9 is assembled with a gear housing 8, which will be described later.

A bearing 11 on the left side of the drive shaft 9 is attached to the inner surface of the motor housing 6 . These allow the drive shaft 9 of the electric motor 4 to rotate smoothly. A cooling fan 12 is attached to the driving shaft 9 of the electric motor 4 . Accordingly, when the electric motor 4 is driven, the cooling fan 12 is also rotated by the rotation of the drive shaft 9, so that the electric motor 4 can be cooled.

The handle housing 7 is formed in a substantially loop shape such that its upper side forms a gripping portion 7a that can be gripped with one hand of the operator (see FIG. 1). A trigger 41 that can be pulled by an operator to turn on a switch (not shown) housed in the handle housing 7 is assembled inside the loop of the grip portion 7a.

A lock-off button 26 for validating the pull-in operation of the trigger 41 is provided on the front side of the grip portion 7a. The lock-off button 26 is provided with operating portions 26 a and 26 b projecting left and right from the handle housing 7 . The lock-off button 26 is configured such that when one operating portion 26a is pushed in, the other operating portion 26b is pushed out. For example, the imaginary lines in FIGS. 3 and 5 show a state in which the right operating section 26b of the left and right operating sections 26a and 26b is pushed and the left operating section 26a is pushed out.

Further, the left and right operation portions 26a and 26b are formed by cutting a cylindrical shape with an inclined plane, and are united by an intermediate portion therebetween. More specifically, the operating portions 26a and 26b are formed to form an inclined surface 26c in which the upper side is notched with respect to the lower side in the vertical direction. As a result, the surface of the tip of the fingertip can be easily brought into contact with the operating portion 26a or the operating portion 26b. By doing so, even when the lock-off button 26, which needs to be moved horizontally in the left-right direction, is not strictly operated in the left-right direction, but is operated in the left-right direction while applying a little downward force. , can be operated without discomfort.

A controller 27 is accommodated in the lower side of the handle housing 7 . The controller 27 is connected via lead wires (not shown) to the electric motor 4 and switches described above, and to a power supply section 30 (battery pack 31) described later. Thus, when the operator pulls in the trigger 41, the electric motor 4 can be driven. The controller 27 includes a control circuit for transmitting a control signal based on the rotational position information of the rotor 4b detected by the sensor substrate 4c, and a current for the electric motor 4 based on the control signal received from this control circuit. A switching drive circuit and an auto-stop circuit that cuts off the power supply to the electric motor 4 according to the detection result of the state of the battery pack 31 so as not to over-discharge or over-current are mounted.

A power supply unit 30 is provided on the rear side of the motor housing 6, and a battery pack 31 can be attached to and detached from the power supply unit 30 by sliding (see FIG. 1). The direction in which the battery pack 31 is attached by sliding is from left to right, and the direction in which the battery pack 31 is removed by sliding is from right to left. This makes it possible to easily attach and detach the battery pack 31 .

The gear housing 8 is integrally provided on the left side of a fixed cover 8a covering substantially the upper half of the saw blade 5. As shown in FIG. Both ends of the intermediate shaft 14 housed in the gear housing 8 are supported by bearings 15 and 16 (see FIG. 7). These bearings 15 and 16 are assembled to the inner surface of the gear housing 8 . Thereby, the intermediate shaft 14 accommodated in the gear housing 8 can be smoothly rotated. Further, the intermediate shaft 14 is provided with a second gear 17 that can mesh with the first gear 13 formed on the drive shaft 9 .

Both ends of the final shaft (output shaft) 19 accommodated in the gear housing 8 are supported by bearings 20 and 21 . A bearing 20 on the tip end side of the final shaft 19 is accommodated in the gear housing 8 via a bearing box 22 having a cylindrical shaft portion 23 . A bearing 21 on the base end side of the final shaft 19 is assembled to the inner surface of the gear housing 8 . As a result, the final shaft 19 accommodated in the gear housing 8 can be smoothly rotated.

A fourth gear 24 is key-coupled to the final shaft 19 so as to mesh with a third gear 18 formed on the outer peripheral surface of the intermediate shaft 14 . The saw blade 5 described above is fastened via a bolt 25 so as to be perpendicular to the tip of the final shaft 19 . As a result, when the electric motor 4 is driven, the saw blade 5 can be rotated via the drive shaft 9 , the intermediate shaft 14 and the final shaft 19 .

The front end of the fixed cover 8a is pivotally attached to a U-shaped bracket 32 by a support shaft 33 so as to be vertically swingable (see FIGS. 2 and 4). The bracket 32 is connected via a support shaft 35a to an angular plate 35 which is erected on the base 2 and has an arc-shaped guide groove (not shown) so as to be fixed at any position along the guide groove. (See Figure 3). This arbitrary position can be fixed by tightening the lever 36 .

On the other hand, an angular plate 38 is erected on the base 2 also on the rear side of the fixed cover 8a. The angular plate 38 is provided with a depth guide 39 curved forward in an arc shape on the side of the fixed cover 8a. By tightening the lever, the fixed cover 8a can be fixed at an arbitrary position along the guide groove 39a of the depth guide 39 (see FIG. 5). Therefore, by changing the connecting position (clamping position) of the fixed cover 8a along the depth guide 39, the circular saw body 3 is pivoted about the support shaft 33, and the saw blade 5 protrudes downward from the base 2. The amount (the cutting depth of the saw blade 5) can be adjusted.

Further, by loosening the lever 36 and changing the fixing position of the bracket 32 to the angular plate 35, the circular saw body 3 can be tilted to the right from the perpendicular position where the saw blade 5 intersects the base 2 around the support shaft 35a. The saw blade 5 can be fixed to the base 2 at an arbitrary tilt angle up to the maximum tilt position, which is tilted at an angle of about 45°, for example. The front end of the base 2 is formed with a guide portion 40 whose side edges are located on the extension of the saw blade 5 at the right angle (0°) position and the approximately 45° position of the saw blade 5, respectively. By aligning the side edge of the guide part 40 with the black line written on the upper surface of the , cutting along the black line is easily possible.

A movable cover 50 is attached to the lower side of the fixed cover 8a (see FIG. 7). The movable cover 50 is attached to the bearing box 22 of the gear housing 8 so that the insertion hole 71 is inserted into the shaft portion 23 of the bearing box 22 . As a result, the inner peripheral surface 52 of the insertion hole 51 of the movable cover 50 slides against the outer peripheral surface 23a of the shaft portion 23 of the bearing box 22, so that the movable cover 50 slides against the bearing box 22 (gear housing 8). can be rotated. A tension spring 53 is hooked between a hooking hole (not shown) of the fixed cover 8 a of the gear housing 8 and a hooking hole (not shown) of the movable cover 50 . The tension spring 53 acts to close the movable cover 50 .

A rectangular body 45 protruding upward is integrally formed on the left front side of the motor housing 6 (see FIG. 9). The rectangular body 45 is formed to have a substantially trapezoidal shape when viewed from the side (see FIG. 6). The upper surface 46 of this square body 45 is substantially rectangular (see FIG. 2), and of the four corners of this rectangle, the left front corner is referred to as a first corner 46a for convenience of explanation.

When the square body 45 is formed in this way, for example, the front inclined portion 7b of the handle housing 7, the tip 36a of the lever 36 of the angular plate 35, and the first corner 46a of the square body 45 of the motor housing 6 are separated. The portable circular saw 1 can be placed upside down on the ground E with three supporting points (see FIG. 10). That is, the portable circular saw 1 can be placed on the ground E while being turned upside down. Therefore, the portable circular saw 1 can be placed upside down on the ground E without increasing the amount of protrusion (projection amount) to the left side of the motor housing 6 . Therefore, it is possible to prevent the portable circular saw 1 from becoming large.

When placed upside down in this manner, the longitudinal direction of the grip portion 7a of the handle housing 7 is substantially perpendicular to the ground E (for example, about 80°) (see FIG. 11). Therefore, when the operator resumes the interrupted cutting work after interrupting the cutting work and placing the portable circular saw 1 upside down on the ground E behind himself, the portable circular saw 1 placed upside down behind himself is It is possible to obtain the effect that the grip portion 7a of the handle housing 7 can be easily gripped. Further, when the square body 45 is formed in this manner, the square body 45 can be used as a part for fingers of the hand opposite to the hand gripping the grip portion 7a of the handle housing 7 when the operator is cutting. Available. Therefore, the cutting work by the portable circular saw 1 can be stabilized.

The base 2 described above is composed of a main base 2x to which the circular saw body 3 is attached, and a sub-base 2y that can be attached to and detached from the right side of the main base 2x (see FIG. 12). 12 to 14 are diagrams specialized for explaining the main bass 2x and the sub-bass 2y. A pair of bosses 2x1 are provided on the right front side and the right rear side of the main base 2x. A substantially circular concave portion 2x2 is formed on the front side (right side) of the boss 2x1.

Further, a threaded hole 2x3 into which a thumbscrew 2z described later can be screwed is formed concentrically with the recess 2x2 on the far side (left side) of the recess 2x2 of the boss 2x1. The main base 2x is integrally formed by aluminum die casting. Therefore, the shape of the main base 2x can be finished with high accuracy. The surface of the main base 2x is surface-treated by nickel plating. These are the same for the sub-base 2y, which will be described later.

On the other hand, a pair of bosses 2y1 are provided on the left front side and the left rear side of the sub-base 2y so as to face the pair of bosses 2x1 of the main base 2x. An insertion hole 2y2 into which the thumbscrew 2z can be inserted is formed in the boss 2y1 so as to be concentric with the recess 2x2 of the main base 2x. A cylindrical protrusion 2y3 protruding from the outlet side (left side) is fitted to the insertion hole 2y2 in a recess 2x2 of the main base 2x.

Next, a procedure for attaching the sub-base 2y to the main base 2x will be described. First, the work of fitting the convex portions 2y3 of the pair of bosses 2y1 of the sub-base 2y into the concave portions 2x2 of the pair of bosses 2x1 of the main base 2x is performed. Next, the thumbscrews 2z are inserted through the insertion holes 2y2 of the pair of bosses 2y1 of the sub-base 2y, and the inserted thumbscrews 2z are screwed into the screw holes 2x3 of the pair of bosses 2x1 of the main base 2x. I do. In this way, the sub-base 2y can be attached to the main base 2x (see FIGS. 13 and 14). Also, the attached sub-base 2y can be removed from the main base 2x by performing the reverse operation of the above-described operation.

When this sub-base 2y is attached, a pressing surface (sliding surface) against the material to be cut can be ensured not only on the left side of the saw blade 5 but also on the right side during the cutting operation. Therefore, it is possible to secure the stability of the portable circular saw 1 in the horizontal direction during the cutting work. On the other hand, when the sub-base 2y is removed, it is possible to cut the edge of the material to be cut (for example, the floor surface near the wall surface) in the cutting operation. Therefore, convenience of so-called boundary cutting can be achieved. As described above, since the shapes of the main base 2x and the sub-base 2y can be finished with high accuracy, the lower surface of the sub-base 2y (the material to be cut) pressing surface against) can be made flush. The portable circular saw 1 is configured as described above.

Next, referring to FIG. 8, the sliding plate 70 will be described. The sliding plate 70 includes a plate body 71 formed to have substantially the same size as the base 2 (slightly larger in the longitudinal direction of the base 2 and slightly smaller in the lateral direction of the base 2); The guide body 72 is formed by bending the left side of the front edge 71b and the left side of the rear edge 71c to form a pair of front and rear guide bodies 72. As shown in FIG. A resin sheet 75 having high slidability is attached to the lower surface 71 a of the plate body 71 .

On the other hand, both of the guide bodies 72 are each formed in a substantially inverted L shape by a vertical wall 73 and a horizontal wall 74 . When formed in this way, each vertical wall 73 of both guide bodies 72 has a shape extending upward to a position facing the front edge 2c and the rear edge 2d of the base 2. As shown in FIG. This trailing edge 2d corresponds to the "outer shell" described in the claims. Further, each lateral wall 74 of both guide bodies 72 has a shape extending in a direction in which they approach each other. Since the front edge 2 c and the rear edge 2 d of the base 2 can be sandwiched between the two guide bodies 72 , the slide plate 70 can be inserted into the base 2 . A pair of insertion holes 73a are formed in the vertical wall 73 of the rear guide body 72 at positions corresponding to the hexagonal holes 63a of the fastening members 62 when the sliding plate 70 is inserted into the base 2. ing. The sliding plate 70 is configured in this manner.

Next, with reference to FIGS. 15 to 19, the operation of attaching the sliding plate 70 to the lower surface 2b of the base 2 of the portable circular saw 1 will be described. First, from the state shown in FIG. 15 (the state before the sliding plate 70 is attached to the lower surface 2b of the base 2), the front edge 2c and the rear edge 2d of the base 2 are sandwiched between the guide members 72 of the sliding plate 70. Then, the operation of inserting the sliding plate 70 into the base 2 is performed. Then, the right edges 74a of both guide bodies 72 of the sliding plate 70 interfere with both stoppers 60 of the base 2 (see FIGS. 16 and 17).

This completes the alignment work of the slide plate 70 with respect to the base 2 . That is, the operation of inserting the sliding plate 70 into the base 2 is completed. Next, the tip 65a of the hexagonal wrench 65 is inserted into the hexagonal hole 63a of the fastening member 62 of the base 2 through the insertion hole 73a of the slide plate 70. As shown in FIG. Next, the inserted hex wrench 65 is used to loosen the fastening member 62 (see FIGS. 18 and 19).

Then, the loosened head portion 63 of the fastening member 62 presses the inner wall surface 73c of the vertical wall 73 of the guide body 72 behind the sliding plate 70 . That is, when the fastening member 62 is loosened, the head portion 63 of the loosened fastening member 62 presses the edge of the insertion hole 73 a of the vertical wall 73 . At the same time, the front edge 2c of the base 2 presses the inner wall surface 73c of the vertical wall 73 of the guide body 72 in front of the sliding plate 70. As shown in FIG. These pressing amounts can be adjusted by loosening or tightening the fastening member 62 . The loosening or tightening direction of the fastening member 62 is the front-rear direction (planar direction) of the base surface 2 a of the base 2 .

Therefore, the base 2 and the guide body 72 behind the sliding plate 70 are stretched through the fastening member 62 . Therefore, relative movement between the base 2 and the slide plate 70 in the front-rear direction is restricted, and as a result, the slide plate 70 is attached to the lower surface 2 b of the base 2 . In this manner, the slide plate 70 can be attached to the lower surface 2b of the base 2 of the portable circular saw 1. As shown in FIG. The slide plate 70 can be removed from the lower surface 2b of the base 2 of the portable circular saw 1 by performing the reverse operation of the series of operations described above.

Finally, the operation of the portable circular saw 1 to which the slide plate 70 is attached will be described. When the trigger 41 is pulled in while the lower surface 71a (resin sheet 75) of the sliding plate 70 is pressed against the upper surface of the material to be cut, the switch is operated (ON) and power is supplied from the battery pack 31 to the electric motor 4. is supplied. As a result, the electric motor 4 is driven, and the saw blade 5 is rotated via the drive shaft 9 , the intermediate shaft 14 and the final shaft 19 .

While rotating the saw blade 5 while pressing the lower surface 71a of the sliding plate 70, the portable circular saw 1 slides (slides) on the upper surface of the material to be cut, thereby cutting the material to be cut. can be cut. At this time, the slidability between the upper surface of the material to be cut and the lower surface 71a of the slide plate 70 can be enhanced by the resin sheet 75 attached to the lower surface 71a of the slide plate 70, as in the conventional technique. Therefore, the sliding operation of sliding the circular saw body 3 against the upper surface of the material to be cut can be performed smoothly. Therefore, workability of cutting the material to be cut can be improved.

As the material is cut in this manner, the material to be cut presses against the movable cover 50 , and the movable cover 50 thus pressed rotates against the biasing force of the tension spring 53 . Eventually, when the cutting of the material to be cut is completed and the pressing of the material to be cut against the movable cover 50 is released, the restoring force of the tension spring 53 returns the movable cover 50 to the closed state.

Further, as already explained, when the electric motor 4 is driven, the rotation of the drive shaft 9 also causes the cooling fan 12 to rotate. Then, outside air is taken in from the intake port 6a of the motor housing 6 (see FIG. 2). As shown in FIG. 2, the taken outside air cools the stator 4a and the rotor 4b by flowing from left to right. Also, the motor cooling air is blown from the inner peripheral side of the baffle plate 28 through the inside of the gear housing 8 into the fixed cover 8a. Part of the motor cooling air is blown into the duct 29 through the inner peripheral side of the baffle plate 28 .

As is clear from FIG. 2, the tip side of the duct 29 faces the direction of the guide portion 40 . Therefore, the motor cooling air blown into this duct 29 is blown out toward the guide portion 40 of the base 2 . Therefore, the motor cooling air blown out from the duct 29 can blow away the cutting powder accumulated on the guide portion 40 . In addition, the cutting powder deposited on the cut portion C can be blown away by the motor cooling air blown into the fixed cover 8a. By blowing off the cutting dust, the operator can clearly see the guide portion 40 and the smear line in addition to the cut portion C, thereby performing accurate cutting work quickly.

The first embodiment of the present invention is constructed as described above. According to this configuration, each vertical wall 73 of both guide bodies 72 of the sliding plate 70 has a shape extending upward to a position facing the front edge 2c and the rear edge 2d of the base 2 . Further, each lateral wall 74 of both guide bodies 72 has a shape extending in a direction in which they approach each other. Then, the front edge 2c and the rear edge 2d of the base 2 are sandwiched between the guide bodies 72 of the sliding plate 70, and the fastening member 62 is loosened while the sliding plate 70 is inserted into the base 2. conduct. Then, the loosened head portion 63 of the fastening member 62 presses the inner wall surface 73c of the vertical wall 73 of the guide body 72 behind the sliding plate 70 . At the same time, the front edge 2c of the base 2 presses the inner wall surface 73c of the vertical wall 73 of the guide body 72 in front of the sliding plate 70. As shown in FIG. Therefore, the base 2 and the guide body 72 behind the sliding plate 70 are stretched through the fastening member 62 . Therefore, relative movement between the base 2 and the sliding plate 70 in the front-rear direction is restricted, and as a result, the sliding plate 70 is attached to the base 2 . The sliding plate 70 can be attached to the base 2 of the portable circular saw 1 in this way. Therefore, in attaching the sliding plate 70 to the lower surface 2b of the base 2, unlike the prior art, it is not necessary to ensure the thickness of the sliding plate 70 for screwing. Therefore, since the height position of the circular saw body 3 (the height position of the saw blade 5) with respect to the upper surface of the material to be cut is not raised, the cutting depth of the saw blade 5 can be sufficiently secured.

Further, according to this configuration, the amount of pressing of the head portion 63 of the fastening member 62 against the inner wall surface 73c of the vertical wall 73 of the guide body 72 behind the sliding plate 70 can be adjusted by loosening or tightening the fastening member 62. It has become. Therefore, this pressing force can be finely adjusted. Therefore, the sliding plate 70 can be securely mounted.

Further, according to this configuration, the loosening or tightening direction of the fastening member 62 is the front-rear direction of the base surface 2 a of the base 2 . Therefore, the operation of loosening or tightening the fastening member 62 necessary for attaching the slide plate 70 to the base 2 is performed from the lateral side or the upper side. Therefore, workability of attaching the sliding plate 70 can be improved.

Further, according to this configuration, the vertical wall 73 of the guide body 72 behind the sliding plate 70 corresponds to each hexagonal hole 63a of both fastening members 62 when the sliding plate 70 is inserted into the base 2. A pair of insertion holes 73a are formed at positions where they are aligned. Therefore, the operation of loosening or tightening the fastening member 62 necessary for attaching the sliding plate 70 to the base 2 is performed from the rear through the pair of insertion holes 73a. Therefore, workability of attaching the sliding plate 70 can be further improved.

Further, according to this configuration, when the fastening member 62 is loosened, the head portion 63 of the loosened fastening member 62 presses the edge of the insertion hole 73 a of the vertical wall 73 . Therefore, it is possible to simplify the configuration for pressing the head portion 63 of the fastening member 62 against the vertical wall 73 while ensuring the workability of the insertion hole 73a. That is, it is possible to eliminate the need for a separate member or the like for pressing. Also, the head portion 63 of the fastening member 62 presses the edge of the insertion hole 73a of the vertical wall 73 evenly in the circumferential direction. Therefore, the distortion of the vertical wall 73 due to this pressing can be suppressed.

(Second embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. 20-25. This second embodiment is a form in which the sliding plate 70 is attached to the base 2 by a different method compared to the already described first embodiment. In the following description, members having the same or equivalent configuration as the members described in the first embodiment are denoted by the same reference numerals in the drawings, thereby omitting redundant description. This also applies to third and fourth embodiments, which will be described later.

First, the base 102 of the portable circular saw 1 of the second embodiment will be described (see FIG. 20). A substantially trapezoidal notch 160 is formed at the left rear corner of the base 102 . Therefore, the front wall surface 160a of the notch 160 is formed in a slanted shape that is slanted rearward from the left side to the right side. A screw hole 161 is formed in the right wall surface 160b of the notch 160. As shown in FIG. A screw 166 to be described later can be screwed into this screw hole 161 .

A substantially trapezoidal spacer 165 can be inserted into the notch 160 . The spacer 165 is formed with an insertion hole 165a into which a screw 166, which will be described later, can be inserted. The insertion hole 165a is formed in an elongated hole shape when viewed from the left side (see FIG. 23). A front wall surface 165b of the spacer 165 is formed in an inclined shape substantially parallel to the front wall surface 160a of the notch 160. As shown in FIG. The base 102 is configured in this manner.

Next, with reference to FIGS. 20 to 25, the operation of attaching the slide plate 70 to the lower surface 2b of the base 102 of the portable circular saw 1 will be described. First, from the state shown in FIG. 20 (the state before the sliding plate 70 is attached to the lower surface 2b of the base 102), the front edge 2c and the rear edge 2d of the base 102 are sandwiched between the guide members 72 of the sliding plate 70. Then, the operation of inserting the sliding plate 70 into the base 102 is performed. Then, the right edges 74a of both guide bodies 72 of the sliding plate 70 interfere with both stoppers 60 of the base 102 (see FIG. 21).

This completes the alignment work of the sliding plate 70 with respect to the base 102 . That is, the operation of inserting the slide plate 70 into the base 102 is completed. Next, the work of inserting the spacer 165 into the notch 160 of the base 102 is performed (see FIGS. 22 and 23). Next, a screw 166 is inserted into the insertion hole 165a of the spacer 165, and the inserted screw 166 is screwed into the screw hole 161 of the base 2 (see FIGS. 24 and 25).

Then, the spacer 165 is pushed rightward by this tightening. At this time, since the front wall surface 165b of the spacer 165 is pressed against the front wall surface 160a of the notch 160, the spacer 165 is also pushed rearward (wedge effect). That is, when the screw 166 is tightened, the rear wall surface 165c of the spacer 165 presses the inner wall surface 73c of the vertical wall 73 of the guide body 72 behind. This pressing amount can be adjusted by tightening or loosening the screw 166 . The screw 166 is tightened or loosened in the horizontal direction (planar direction) of the base surface 2a of the base 2. As shown in FIG. In this second embodiment, the spacer 165 functions as an integrated wedge member and fastening member.

Therefore, the base 102 and the guide body 72 behind the slide plate 70 are stretched through the spacer 165 . Therefore, relative movement between the base 102 and the slide plate 70 in the front-rear direction is restricted, and as a result, the slide plate 70 is attached to the lower surface 2 b of the base 102 . In this manner, the sliding plate 70 can be attached to the lower surface 2b of the base 102 of the portable circular saw 1. As shown in FIG. The sliding plate 70 can be removed from the lower surface 2b of the base 102 of the portable circular saw 1 by performing the reverse operation of the series of operations described above.

The second embodiment of the invention is configured as described above. According to this configuration, when attaching the slide plate 70 to the lower surface 2b of the base 102, it is not necessary to ensure the thickness of the slide plate 70 for screwing, unlike the prior art, as in the first embodiment. do not have. Therefore, since the height position of the circular saw body 3 (the height position of the saw blade 5) with respect to the upper surface of the material to be cut is not raised, the cutting depth of the saw blade 5 can be sufficiently secured.

Further, according to this configuration, when the screw 166 is tightened, the rear wall surface 165c of the spacer 165 presses the inner wall surface 73c of the vertical wall 73 of the rear guide body 72. As shown in FIG. Therefore, the sliding plate 70 can be attached to the lower surface 2b of the base 102 with a sense of stability with a simple structure such as tightening of one screw 166. As shown in FIG.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS. 26-32. The third embodiment is a form in which the sliding plate 70 is attached to the base 2, 102 by a further different method compared to the already described first and second embodiments.

First, the base 202 of the portable circular saw 1 of the third embodiment will be described (see FIGS. 26 and 27). A pair of insertion holes 261 are formed in the rear wall surface 2g of the base 202. As shown in FIG. The insertion hole 261 has a large-diameter portion 261a on the entrance side, and a small-diameter portion 261c on the opposite side of the entrance via a stepped portion 261b. A female screw 261d corresponding to a male screw 265b formed on a retainer 265, which will be described later, is formed on the inlet side of the inner peripheral surface of the large diameter portion 261a. Thereby, the retainer 265 can be tightened into the insertion hole 261 . Also, the tightened retainer 265 can be loosened.

A stepped pin 263 is inserted into this insertion hole 261 via a compression spring 262 .
The compression spring 262 is interposed between the stepped portion 261 b and the flange portion 263 a of the stepped pin 263 . A retainer 265 is inserted into the insertion hole 261 with the tip 263b of the stepped pin 263 passing through the through hole 265a so that the stepped pin 263 with the compression spring 262 interposed therein does not fall out of the insertion hole 261. is tightened. The base 202 is configured in this manner.

Next, with reference to FIGS. 26 to 32, the operation of attaching the slide plate 70 to the lower surface 2b of the base 202 of the portable circular saw 1 will be described. First, from the state shown in FIGS. 26 and 27 (the state before the slide plate 70 is attached to the lower surface 2b of the base 202), the work of tilting the base 202 toward the rear side so as to assume a downward tilting posture is performed. Next, the trailing edge 2d of the base 202 is pressed against the guide body 72 behind the slide plate 70 so that the trailing edge 2d of the base 202 is sandwiched between the guide bodies 72 behind the slide plate 70 . In this third embodiment, the stepped pin 263 corresponds to the fastening member.

Then, the tip 263b of the stepped pin 263 is pressed against the inner wall surface 73c of the vertical wall 73 of the guide body 72, so that the stepped pin 263 retreats into the insertion hole 261 against the biasing force of the compression spring 262. . As a result, in plan view, the front edge 2c of the base 202 and the rear edge 74b of the lateral wall 74 of the guide body 72 on the front side of the slide plate 70 do not interfere with each other (see FIGS. 28 and 29). Next, an operation is performed to return the base 202 in the downward tilting posture to the state before tilting (see FIG. 30).

Next, an operation for canceling the pressing of the trailing edge 2d of the base 202 against the guide body 72 is performed. Then, since the stepped pin 263 advances from the insertion hole 261 by the restoring force of the compression spring 262, the tip 263b of the advanced stepped pin 263 presses the inner wall surface 73c of the vertical wall 73 of the guide body 72 behind. The front edge 2c of the base 2 presses the inner wall surface 73c of the vertical wall 73 of the guide body 72 in front of the sliding plate 70 (see FIGS. 31 and 32).

Therefore, the base 202 and the guide body 72 behind the sliding plate 70 are stretched through the stepped pin 263 . Therefore, relative movement between the base 202 and the slide plate 70 in the front-rear direction is restricted, and as a result, the slide plate 70 is attached to the lower surface 2 b of the base 202 . In this manner, the sliding plate 70 can be attached to the lower surface 2b of the base 202 of the portable circular saw 1. As shown in FIG. The sliding plate 70 can be removed from the lower surface 2b of the base 202 of the portable circular saw 1 by performing the reverse operation of the series of operations described above.

The third embodiment of the present invention is constructed as described above. According to this configuration, in attaching the sliding plate 70 to the lower surface 2b of the base 202, similarly to the first embodiment and the second embodiment, unlike the prior art, the thickness of the sliding plate 70 for screwing is different from that of the prior art. need not be ensured. Therefore, since the height position of the circular saw body 3 (the height position of the saw blade 5) with respect to the upper surface of the material to be cut is not raised, the cutting depth of the saw blade 5 can be sufficiently secured.

Further, according to this configuration, since the stepped pin 263 advances from the insertion hole 261 by the restoring force of the compression spring 262, the tip 263b of the stepped pin 263 that has advanced is the inner wall surface of the vertical wall 73 of the guide body 72 behind. While pressing 73c, the front edge 2c of the base 2 presses the inner wall surface 73c of the vertical wall 73 of the guide body 72 in front of the sliding plate . Therefore, the slide plate 70 can be attached to or removed from the lower surface 2b of the base 202 of the portable circular saw 1 without the need for screw tightening or loosening.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIGS. 33-37. Compared with the first, second, and third embodiments already described, this fourth embodiment is a form in which the mounting of the slide plate 70 to the bases 2, 102, 202 is further different. be.

First, the base 302 of the portable circular saw 1 of the fourth embodiment will be described (see FIG. 33). A pair of screw holes 361 are formed in the rear wall surface 2g of the base 302. As shown in FIG. A machine screw 366 described later can be screwed into this screw hole 361 . This machine screw 366 is a pan head screw having a head 366a. A pan head machine screw is a type of screw with a relatively small shaft diameter defined by JIS No. 2402 with a head. The pair of screw holes 361 are formed at positions corresponding to the pair of insertion holes 73 a when the slide plate 70 is inserted into the base 2 . The base 302 is configured in this manner.

Next, with reference to FIGS. 33 to 37, the operation of attaching the slide plate 70 to the lower surface 2b of the base 302 of the portable circular saw 1 will be described. First, from the state shown in FIG. 33 (the state before the sliding plate 70 is attached to the lower surface 2b of the base 302), the front edge 2c and the rear edge 2d of the base 302 are sandwiched between the guide members 72 of the sliding plate 70. Then, the operation of inserting the sliding plate 70 into the base 302 is performed. Then, the right edges 74a of both guide bodies 72 of the sliding plate 70 interfere with both stoppers 60 of the base 302 (see FIGS. 34 and 35).

This completes the alignment work of the sliding plate 70 with respect to the base 302 . That is, the operation of inserting the sliding plate 70 into the base 302 is completed. Next, a small screw 366 is inserted into the screw hole 361 of the base 302 through the insertion hole 73a of the sliding plate 70, and the inserted small screw 366 is screwed into the screw hole 361 of the base 302. As shown in FIG. Then, the sliding plate 70 is pushed forward by this tightening. Eventually, the inner wall surface 73c of the vertical wall 73 on the rear side of the slide plate 70 is pressed against the projecting portion 2g1 of the rear wall surface 2g of the base 302 (see FIG. 36).

Therefore, relative movement between the base 302 and the sliding plate 70 in the front-rear direction is restricted, so that the sliding plate 70 is attached to the lower surface 2b of the base 302 as a result. In this manner, the sliding plate 70 can be attached to the lower surface 2b of the base 302 of the portable circular saw 1. As shown in FIG. The sliding plate 70 can be removed from the lower surface 2b of the base 302 of the portable circular saw 1 by performing the reverse operation of the series of operations described above. 37, when the machine screw 366 is screwed into the screw hole 361, the head 366a of the machine screw 366 does not protrude from the lower surface 2b side of the base 302. As shown in FIG.

The fourth embodiment of the present invention is constructed as described above. According to this configuration, in attaching the sliding plate 70 to the lower surface 2b of the base 302, similarly to the first, second, and third embodiments, unlike the prior art, the sliding plate 70 is screwed. It is possible to make the base 302 thinner because it is not necessary to secure a thickness for fixing. By making the base 302 thinner, the height position of the circular saw body 3 (the height position of the saw blade 5) relative to the upper surface of the material to be cut can be reduced. enough to secure.

Also, according to this configuration, the sliding plate 70 is attached by a machine screw 366 having a head portion 366a with a small shaft diameter. Therefore, even if the machine screw 366 is laterally screwed into the screw hole 361 provided in the rear wall surface 2g of the base 302, the head 366a is also small, so the head 366a of the machine screw 366 that is tightened does not reach the lower surface 2b of the base 302. It does not protrude from the side of the base surface (upper surface) 2a or protrudes significantly from the side of the base surface (upper surface) 2a. Therefore, this fastening structure (the head 366a of the machine screw 366) can be accommodated within the thickness region of the base 302. FIG. Further, since the position of the threaded portion can be kept low, there is no need to provide a large screw boss or the like on the base surface 2a of the base 302. FIG. Therefore, mounting of the base 302 can be implemented compactly.

The contents described above are merely related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.

In each embodiment, the portable circular saw 1 has been described as an example of the portable electric machine. However, it is not limited to this, and a cutter, jigsaw, router, or the like may be used.

Further, in the first embodiment, the slide plate 70 is attached to the lower surface 2b of the base 2 in such a manner that the base 2 and the vertical wall 73 of the guide body 72 behind the slide plate 70 are braced via the fastening member 62. explained. That is, the form in which the relative movement in the front-rear direction between the base 2 and the sliding plate 70 is restricted has been described. However, the mounting of the sliding plate 70 is not limited to this, and a form in which the base 2 and the lateral wall 74 of the guide body 72 behind the sliding plate 70 are braced through the fastening member 62 may be used. In other words, a form in which the relative movement in the vertical direction between the base 2 and the sliding plate 70 is restricted may be employed.

Also, in the second embodiment, the spacer 165 functions as a wedge member and a fastening member integrated together. However, the configuration is not limited to this, and the wedge member and the fastening member may be separated from each other.

Further, in the fourth embodiment, the pan head machine screw has been described as an example of the machine screw 366 . However, it is not limited to this, and may be a countersunk head screw.

1 Portable circular saw (portable electric processing machine)
2 base (first embodiment)
2a base surface 2b lower surface 2c leading edge 2d trailing edge (outer shell)
2g Rear wall surface 2g1 Protruding part 3 Circular saw body 4 Electric motor 4a Stator 4b Rotor 4c Sensor board 5 Saw blade 6 Motor housing 6a Intake port 7 Handle housing 7a Grip part 8 Gear housing 8a Fixed cover 9 Drive shaft 10 Bearing 11 Bearing 12 Cooling fan 13 First gear 14 Intermediate shaft 15 Bearing 16 Bearing 17 Second gear 18 Third gear 19 Last shaft 20 Bearing 21 Bearing 22 Bearing box 23 Shaft 23a Outer peripheral surface 24 Fourth gear 25 Bolt 26 Lock-off button 26a Left Operation portion 26b Right operation portion 26c Inclined surface 27 Controller 28 Baffle plate 29 Duct 30 Power supply unit 31 Battery pack 32 Bracket 33 Support shaft 35 Angular plate 35a Support shaft 36 Lever 38 Angular plate 39 Depth guide 39a Guide groove 40 Guide portion 41 Trigger 45 Square body 46 Upper surface 46a First corner 50 Movable cover 51 Insertion hole 52 Inner peripheral surface 53 Extension spring 60 Stopper 61 Screw hole 62 Fastening member 63 Head 63a Hexagonal hole 65 Hexagonal wrench 65a Tip 70 Sliding plate 71 Plate main body 71a Lower surface 71b Front edge 71c Rear edge 72 Guide body 73 Vertical wall (wall portion)
73a insertion hole 73c inner wall surface 74 lateral wall 74a right edge 74b rear edge 75 resin sheet 102 base (second embodiment)
160 Notch 160a Front wall surface 160b Right wall surface 161 Screw hole 165 Spacer (fastening member)
165a Insertion hole 165b Front wall surface 165c Rear wall surface 166 Screw 202 Base (third embodiment)
261 insertion hole 261a large diameter portion 261b stepped portion 261c small diameter portion 261d female screw 262 compression spring 263 stepped pin (fastening member)
263a flange 263b tip 265 retainer 265a through hole 265b male screw 302 base (fourth embodiment)
361 screw hole 366 machine screw (fastening member)
366a head C cut site E ground

Claims (10)

A sliding plate that can be attached to and detached from the lower surface of a base of a portable electric processing machine that processes a workpiece by moving forward ,
A wall portion extending upward is provided at a position facing the outer shell of the base, and a fastening member is provided between the outer shell of the base and the wall portion for fastening the outer shell of the base and the wall portion,
A guide body formed in a substantially inverted L shape by the wall portion and a lateral wall formed inward from the tip of the wall portion,
The guide bodies are provided at positions facing each other on a front portion and a rear portion of the base,
The fastening member presses the front portion of the base and the wall portion in the front-rear direction below the lateral wall of the guide body to fasten the fastening member, or fastens the rear portion of the base and the wall portion to the lateral wall of the guide body. A sliding plate that is configured to be fastened by being pressed in the front-rear direction below the . A sliding plate according to claim 1,
The wall portion is fastened to the outer shell of the base within the thickness region of the base by tightening a small screw as the fastening member into a screw hole provided in the outer shell of the base,
The head of the machine screw is located in a region below the lateral wall and above the lower surface of the plate body. A sliding plate according to claim 1,
A sliding plate is fixed to the base by providing a wall portion extending upward at a position facing the outer shell of the base, and pressing the wall portion outwardly from the inside by the fastening member. A sliding plate according to claim 3,
A sliding plate fixed to the base by adjusting the pressing amount of the fastening member by tightening or loosening a screw. A sliding plate according to claim 4,
The sliding plate, wherein the tightening or loosening direction of the screw is the planar direction of the base surface of the base. The sliding plate according to any one of claims 4 and 5,
A sliding plate in which an insertion hole for inserting a screw tightening or loosening tool is formed in the wall. A sliding plate according to claim 6,
A sliding plate fixed to the base by pressing the tip of the fastening member against the edge of the insertion hole when the screw is loosened. The sliding plate according to any one of claims 4 and 5,
A sliding plate in which the fastening member is pressed against the wall portion by the wedge action of the wedge member that advances and retreats when the screw is tightened or loosened. A sliding plate according to claim 3,
A sliding plate in which the fastening member presses the wall portion by the biasing force of a spring. A portable electric processing machine equipped with the sliding plate according to any one of claims 1 to 9.

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