JP2003071803A - Circular saw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a circular saw used both for the same cutting operation as that of an ordinary circular saw and for an operation of cutting a floor board without leaving the floor board partly is uncut from the wall. SOLUTION: A circular saw body (M) comprising a motor: an edge tool (15) rotatively driven wit the motor: a motor case (16) for storing the motor: and a fixing cover (17) for covering almost an upper half of the edged tool (15) fitted to the motor case (16), is provided. In the circular saw wherein the fixing cover (17) or the motor case (16) of the circular saw body (M) is in a tiltable manner connected to a base (19) via a tilting fulcrum, the circular saw body (M) can be tilted in both directions to the base (19) by providing at least two kinds of the tilting fulcrums (22 and 23) so that they can be changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circular saw having a circular saw body which can be tilted bidirectionally with respect to a base and whose cutting angle can be changed.

[0002]

2. Description of the Related Art As shown in FIG. 9, a conventional general circular saw has a blade 1 which is rotationally driven by a motor (not shown).
A motor case (not shown) for accommodating a motor arranged behind the blade 1, a fixed cover 2 attached to the motor case with a screw (not shown) for covering substantially the upper half of the blade 1, and a blade 1 A circular saw body M including a moving cover 3 covering the lower half is provided, and the fixed cover 2 of the circular saw body M is tiltably connected to the base 5.

The base 5 is a substantially rectangular plate extending in the front-rear direction of a circular saw, and a front standing member 6 and a rear standing member 7 stand upright from their front and rear ends, respectively, and front and rear standing members 6, 7 are provided. The tilt bracket 8 and the notch adjusting member 9 are respectively attached to the fulcrum pins 10 and 1.
Connected through 1. The two fulcrum pins 10 and 11 are arranged on the same axis extending in the front-rear direction of the circular saw. As a result, the circular saw body M with respect to the base 5 has both fulcrum pins 10, 1
It can be relatively tilted with 1 as a fulcrum.

The inclined bracket 8 is connected to the front end of the fixed cover 2 via a pivot 12 extending in a direction perpendicular to the fulcrum pin 10. The fulcrum pin 10 is attached to the front standing member 6.
A circular arc groove (not shown) that curves around is formed, and the male screw of the screw rod 13a of the inclined fixing screw 13 that penetrates the circular groove is screwed into the female screw (not shown) of the inclined bracket 8. On the other hand, the plate member serving as the cut adjustment member 9 is curvedly inserted into the gap between the inner peripheral surface of the fixed cover 2 and the outer peripheral surface of the movable cover 3. A long groove (not shown) is formed in the cut adjusting member 9 in the length direction thereof. A screw rod (not shown) of a cut fixing screw extending from the inside of the fixed cover 2 toward the fixed cover 2 penetrates the long groove and the circular hole of the fixed cover 2 and is arranged on the outer surface of the fixed cover 2. 14 is screwed into a female screw (not shown).

Thus, if the tilt fixing screw 13 is loosened, the circular saw body M can tilt with respect to the base 5 about the fulcrum pin 10 due to the sliding contact between the front standing member 6 and the tilt bracket 8. By tightening the tilt fixing screw 13, the circular saw body M can be fixed to the base 5 at a desired angle. However, since the motor case exists on one side (paper spine side in FIG. 9) around the fulcrum pins 10 and 11, the circular saw body M can tilt only in the direction in which the motor case separates from the base 5. Therefore, when the base 5 under the circular saw body M is slid on the work material while the blade 1 is rotated by the motor, the work material is cut vertically or at a cut surface having a desired inclination angle. In addition, since the threaded rod of the cut fixing screw can relatively move along the long groove by loosening the cut fixing knob 14, the circular saw body M can be tilted up and down with the pivot 12 of the tilt bracket 8 as a fulcrum. By tightening the notch fixing knob 14, the circular saw body M can be fixed to the base 5 at a desired height. Therefore, the amount of protrusion of the blade 1 below the base 5, that is, the cutting depth can be set to a desired size according to the thickness of the work material.

Further, Japanese Patent No. 2933196, Japanese Utility Model Publication No. 4
No. 30902 discloses a circular saw that can be tilted only in the direction in which the motor case of the circular saw body approaches the base, unlike the normal circular saw described above. In other words, by tilting the circular saw body so that the motor case approaches the base, the blade is made to project obliquely downward from the side edge of the base, which allows, for example, the floor plate to be left uncut from the wall. It is about cutting.

[0007]

The normal circular saw shown in FIG. 9 can tilt the circular saw body M only in the direction in which the motor case of the circular saw moves away from the base 5. Therefore, for example, when cutting a floorboard, There will be left uncut.

Further, in the ordinary circular saw shown in FIG. 9, the relative depth between the cutting adjusting member 9 and the fixed cover 2 is adjusted so that the cutting depth of the work can be adjusted. It is possible to adjust from the maximum to the minimum of the ability to have, but the maximum ~
It is difficult to always accurately set a certain depth of cut between the minimum.

The circular saw of Japanese Patent No. 2933196 can be cut from the wall side when cutting the floor plate, but since the circular saw body can be tilted only in the direction in which the motor case approaches the base, The saw body M cannot be used as a normal circular saw, for example, when the motor case is tilted by 45 degrees in the direction away from the base. Also, since the tilting fulcrum of the blade is above the bottom surface of the base (sliding surface of the base and the work material), the blade on the bottom surface of the base depends on whether the blade is perpendicular to the bottom surface or when the blade is tilted. The positions in the left-right direction greatly differ from each other, which causes a feeling of strangeness when cutting a desired position of the work material.
In addition, since the amount of blade insertion into the work material, that is, the depth of cut is constant, when an object is present below the work material, it is also cut or scratched. Furthermore, in consideration of the inclination of the base toward the motor case, the motor and blade are held above the base to some extent, so the cutting ability (cutting depth) that matches the outer diameter of the blade is secured. I can't.

The circular saw of Japanese Utility Model Laid-Open No. 4-30902 is similar to the circular saw of Japanese Patent No. 2933196, in that the body of the circular saw tilts only in the direction in which its motor case approaches the base. The case cannot be used as a normal circular saw, for example, as it is tilted 45 degrees away from the base.

Therefore, an object of the present invention is to provide a circular saw which can solve the above problems.

[0012]

In order to solve the above-mentioned problems, the invention according to claim 1 provides a motor, a blade (15) rotatably driven by the motor, and a motor case (16) for housing the motor. , A circular saw body (M) consisting of a fixed cover (17) covering substantially the upper half of the blade (15) attached to the motor case (16), and a fixed cover (M) for the circular saw body (M). 17) or motor case (1
In a circular saw in which 6) is tiltably connected to a base (19) via a tilting fulcrum, at least two types of tilting fulcrums (22, 23) are switchably provided, whereby the circular saw body (M) is A circular saw that can tilt in both directions with respect to the base (19) is used.

According to a second aspect of the present invention, the base (19) is provided with a standing member (24), and the standing member (2) is provided.
4) is the fulcrum hole (26, 2) of each tilt fulcrum (22, 23).
7) and a fulcrum hole (2 connected to each fulcrum hole (26 or 27) and curved around another fulcrum hole (27 or 26)
6 and 27) and arc-shaped elongated holes (28, 29) narrower than the fulcrum shaft (30, 3) of each tilt fulcrum (22, 23).
1) has a large-diameter shaft portion (30b, 31b) fitted in each fulcrum hole (26, 27) and a small-diameter shaft portion (30c, 31c) fitted in an arc-shaped elongated hole (28, 29). Claim 1
Use the circular saw described in.

Further, in the invention according to claim 3, the male screw screwed to the fixed cover (17) side or the motor case (16) side has a small diameter shaft portion (30c, 3) of the fulcrum shaft (30, 31).
The circular saw according to claim 1 or 2 formed in 1c) is adopted.

According to a fourth aspect of the invention, there is provided a motor,
A blade (15) rotationally driven by a motor, a motor case (16) for housing the motor, and a fixed cover (17) attached to the motor case (16) and covering substantially the upper half of the blade (15). A circular saw body having a circular saw body (M) made of, and a fixed cover (17) or a motor case (16) of the circular saw body (M) being tiltably connected to a base (19) via a tilting fulcrum. At the fixed cover (1
A stopper for setting a cutting depth by providing a cut adjusting member (38) between the base (19) and the fixed cover (17) with respect to the cut adjusting member (38). A circular saw (41, etc.) is provided on the cutting adjustment member (38) so that its position can be changed.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 3, this circular saw is
A circular saw body M and a base 19 are provided.

The circular saw body M includes a blade 15 which is rotationally driven by a motor (not shown), a motor case 16 which houses the motor, and a blade 1 attached to the motor case 16.
The fixed cover 17 covers substantially the upper half of the blade 5, and the movable cover 18 covers the substantially lower half of the blade 15.

The circular saw body M can be tilted with respect to the base 19 by connecting the fixed cover 17 to the base 19 via a tilt bracket 32, a front standing member 24, etc. described later.

The shaft 15a of the blade 15 extends parallel to a motor shaft (not shown), and the movable cover 18 is rotatably supported by the motor shaft and is shown when cutting a work material.
It is adapted to enter the inside of the fixed cover 17 from a position covering the lower half. A handle 20 is provided at the boundary between the motor case 16 and the fixed cover 17.

The base 19 is a substantially rectangular plate extending in the front-rear direction of the circular saw, and the lower surface thereof is formed as a smooth sliding surface 19a that contacts the work material. On the left side of the base 19, for example, a guide surface 19b that contacts a wall surface is formed, and on this left side, a notch 21 into which the blade 15 and the movable cover 18 can be inserted is formed in a concave shape.

As shown in FIGS. 4 and 5, the base 19 is connected to the front and rear ends of the fixed cover 17 of the circular saw body M via two types of tilt fulcrums 22, 23. Of course, the base 19 may be connected to the motor case 16.
The axes of the tilt fulcrums 22, 23 extend in the front-back direction of the circular saw, and the circular saw body M is bidirectional with respect to the base 19 by selectively using the two types of tilt fulcrums 22, 23 (from the position shown in FIG. 1). It is possible to tilt in a tilting direction like 4 and a tilting direction like in FIG.

The two types of tilt fulcrums 22, 23 are specifically formed as follows.

As shown in FIGS. 1 and 2, a front standing member 24 and a rear standing member 25 are provided at the front and rear ends of the upper surface of the base 19, respectively, and the front standing member 24 and the rear standing member are provided. 25
Stands upright from the front and rear edges of the base 19 and is firmly fixed on the base 19 by rivets, welding or the like.

The front standing member 24, as shown in FIG.
Fulcrum holes 26 and 27 of two types of tilt fulcrums 22 and 23,
Each fulcrum hole 26 or 27 is connected to another fulcrum hole 27 or 2
It has arcuate elongated holes 28 and 29 which are narrower than the fulcrum holes 26 and 27 which are curved around the center 6. The fulcrum holes 26 and 27 are formed as round holes, and the arcuate elongated holes 28 and 29 are the base 1
It is formed to have a length corresponding to the maximum inclination angle of 9. Each fulcrum hole 26, 27 is preferably formed at a location near the base 19. As a result, the blade 15 is held below the base 19 so as to be able to project sufficiently, so that the blade 1 is cut at the cutting depth.
The ability corresponding to the outer diameter of 5 is effectively utilized.

As shown in FIGS. 6 and 7, each fulcrum hole 2
6 and 27 and the arc-shaped elongated holes 28 and 29, each tilt fulcrum 2
The fulcrum shafts 30 and 31 of 2 and 23 are inserted. The fulcrum shaft 30 has a knob 30a, a large-diameter shaft portion 30b fitted in the fulcrum hole 26, and a small-diameter shaft portion 30c fitted in the arcuate elongated hole 28. The other fulcrum shaft 31 is also a knob 31a
And a large-diameter shaft portion 31b fitted in the fulcrum hole 27 and a small-diameter shaft portion 31c fitted in the arcuate elongated hole 29. Fulcrum shaft 3
The large diameter shaft portions 30b and 31b of 0 and 31 are the front standing members 24.
Is formed to have a length substantially equal to the thickness of the large-diameter shaft portions 30b, 3
1b is fitted into the fulcrum holes 26 and 27, so that the fulcrum shaft 3
0 and 31 are supported by the front standing member 24 without rattling. The tip ends of the fulcrum shafts 30 and 31 are engaged with the fixed cover 17 side by desired engaging means, but the fulcrum shaft 3 is desirable.
Male screws are formed on the small-diameter shaft portions 30c and 31c of 0 and 31, and the male screws are attached to the tilt bracket 3 on the fixed cover 17 side.
It is adapted to be screwed into the female screw formed in 2. A nut 33 (a nut of the small-diameter shaft portion 31c is not shown) is screwed onto the tips of the small-diameter shaft portions 30c and 31c. It functions as a stopper for preventing the portion 24 from falling off.

By alternately engaging the large-diameter shaft portions 30b and 31b of the two types of tilt fulcrums 22 and 23 with the fulcrum holes 26 and 27, the circular saw body M is tilted with respect to the base 19 together with the tilt bracket 32. However, as shown in FIGS. 4 and 5, an adjusting screw 34, which is a stopper for restricting the tilt angle when tilting to one side, is provided on the base 19, and a projection 35 that hits the stopper is provided on the tilt bracket 32. It is provided in. The adjusting screw 34, which is a stopper, is screwed onto the upper surface of the base 19, and the tilt angle can be finely adjusted by moving the adjusting screw 34 forward and backward. The adjusting screw 34 and the protrusion 35 may be interchanged between the base 19 and the tilt bracket 32.

As shown in FIG. 3, the rear standing member 25 is
Both arc-shaped elongated holes 28, 2 formed in the front standing member 24
It has a substantially V-shaped groove 36 corresponding to 9. As shown in FIG. 2, a tilt fixing screw 37 is inserted into the groove 36. The tilt fixing screw 37 includes a knob 37a and a screw shaft 37b.
Have and. The male screw formed on the screw shaft 37b is screwed with a female screw (not shown) formed on the cut adjusting member 38 of the cut adjusting means described later. The cut adjusting member 38 is connected to the fixed cover 17 by a cut fixing knob 40 and a cut fixing screw (not shown) as described later.

By using these two types of tilting fulcrums 22, 23 as follows, the blade 15 of the circular saw body M can be used as a base 1.
It can be set at a right angle to 9 and the blade 15
Can be tilted in both directions with respect to the base 19 and set to a desired tilt angle.

That is, as shown in FIG. 1, a circular saw body M
When the blade 15 is set at a right angle to the base 19, the large diameter shaft portions 30b and 31b of the two fulcrum shafts 30 and 31 are used.
Is inserted into the two fulcrum holes 26, 27, and the small diameter shaft portion 30c,
The male screw of 31c is screwed into the female screw of the tilt bracket 32 and tightened. As a result, the blade 15 of the circular saw body M is fixed at a right angle to the base 19.

Further, as shown in FIG. 4, when the blade 15 of the circular saw body M is set to be tilted to one side with respect to the base 19, the other fulcrum shaft 30 of the front standing member 24 is set.
Is rotated in the direction of loosening the screw to detach the large-diameter shaft portion 30b from the fulcrum hole 26 (see FIG. 7). Further, the screw of the screw shaft 37b of the tilt fixing screw 37 of the rear standing member 25 is loosened. After that, the large-diameter shaft portion 31 of the one fulcrum shaft 31
The circular saw body M is tilted in such a direction that the motor case 16 approaches the base 19 with b as a fulcrum. At this time, the male screw of the small diameter shaft portion 31c of the one fulcrum shaft 31 is attached to the tilt bracket 3
The large-diameter shaft portion 31b is fastened to the female screw of No. 2 and the large-diameter shaft portion 31b is fixed to the inclined bracket 32, and the circular saw body M rotates around the large-diameter shaft portion 31b. Along with this, the other fulcrum shaft 3
The small-diameter shaft portion 30c of 0 moves from the fulcrum hole 26 to the arc-shaped elongated hole 28. When the blade 15 of the circular saw body M is tilted by a desired angle with respect to the base 19, the knob 30a on the front standing member 24 side and the knob 37a on the rear standing member 25 side are turned to tighten the screws. M is fixed in the inclined position. The tilt position of the circular saw body M is determined by the other fulcrum shaft 30.
The small-diameter shaft portion 30c comes into contact with one end of the arcuate elongated hole 28, and the projection 35 of the inclined bracket 24 comes into contact with the upper end of the adjusting screw 34 which is a stopper, so that the same is always maintained constant. At this constant tilt position, for example, the blade 15 is the base 1
It is an inclined position so as to match the lower edge of the guide surface 19b of No. 9.

Further, as shown in FIG. 5, when the blade 15 of the circular saw body M is set to be tilted to the other side with respect to the base 19, one fulcrum shaft 31 is provided on the front standing member 24 side. The large-diameter shaft portion 31b is disengaged from the fulcrum hole 27 by rotating the screw in the loosening direction. Further, the screw of the screw shaft 37b of the tilt fixing screw 37 on the rear standing member 25 side is loosened. Thereafter, the circular saw body M is tilted in a direction in which the motor case 16 thereof is separated from the base 19 with the large-diameter shaft portion 30b of the other fulcrum shaft 30 as a fulcrum. Along with this, the small-diameter shaft portion 31c of the one fulcrum shaft 31 moves from the fulcrum hole 27 to the arc-shaped elongated hole 29. At this time, the male screw of the small-diameter shaft portion 30c of the other fulcrum shaft 30 is fastened to the female screw of the tilt bracket 32, and the large-diameter shaft portion 30b is fixed to the tilt bracket 32. Rotate around the portion 30b. When the blade 15 of the circular saw body M is tilted at a desired angle with respect to the base 19, the knob 31a on the front standing member 24 side and the knob 37a on the rear standing member 25 side are turned to tighten the screws. M is fixed in the inclined position. As shown in FIGS. 1 and 7, the front standing member 24 and the inclined bracket 32 include a blade 15 of the circular saw body M.
A scale 45a and a pointer 45b indicating the inclination angle of are displayed.

As shown in FIGS. 2 and 3, the circular saw is provided with a cutting adjustment means so that the cutting depth of the blade 15 can be adjusted. That is, the tilt bracket 32 is connected to the front end of the fixed cover 17 of the circular saw body M via the pivot 39 extending in a direction perpendicular to the fulcrum shafts 30 and 31 of the tilt fulcrums 22 and 23. Further, the cut adjusting member 38 connected to the rear standing member 25 constituting the cut adjusting means is curvedly inserted into the gap between the inner peripheral surface of the fixed cover 17 and the outer peripheral surface of the movable cover 18. The cut adjustment member 38 is an elongated plate member, and a slit-shaped long groove 38a is formed in the length direction thereof. A bolt-shaped notch fixing screw (not shown) extending from the inside of the fixing cover 17 toward the fixing cover 17 penetrates the long groove 38a and a circular hole (not shown) of the fixing cover 17, and the heads of the notch fixing screws are on both sides of the long groove 38a. The male screw part is engaged with the female screw (not shown) of the cut fixing knob 40 arranged on the outer surface of the fixed cover 17.

As a result, if the notch fixing knob 40 is loosened, the notch fixing screw can move relatively along the long groove 38a, so that the circular saw body M can be tilted up and down with the pivot 39 of the tilt bracket 32 as a fulcrum. By tightening the cut fixing knob 40, the circular saw body M can be fixed to the base 19 at a desired height. Therefore, the amount of protrusion of the blade 15 below the base 19, that is, the cutting depth is set to a desired size according to the thickness of the work material.

Further, as shown in FIGS. 2, 3 and 8,
In this circular saw, a stopper that restricts the position of the fixed cover 17 of the circular saw body M with respect to the cutting adjustment member 38 is provided on the cutting adjustment member 38 so that the position can be changed.

The stopper has a slide piece 41 having a substantially U-shaped horizontal cross section, and a cut adjusting member 38 for cutting the slide piece 41.
And a fixing lever 42 for fixing to. One end of the slide piece 41 has a long groove 38 a of the cut adjustment member 38.
The other leg is slidably engaged with the cut adjusting member 38 by contacting the side edge of the cut adjusting member 38. A rotary shaft 43 is passed between both legs of the slide piece 41, and a fixed lever 42 is supported by the rotary shaft 43.
The fixed lever 42 has a cam surface 42a around the rotary shaft 43, and is rotated to the position shown by the solid line in FIG.
The cut adjusting member 38 is sandwiched between the slide piece 41a and the slide piece 41 by the wedge effect, and the cam surface 42a is moved away from the cut adjusting member 38 by being rotated to the position indicated by the chain double-dashed line in FIG. Release 38. By rotating the fixing lever 42 to the position indicated by the chain double-dashed line, sliding the slide piece 41 on the cut adjustment member 38, and then again restraining the cut adjustment member 38 with the cam surface 42a, the slide piece 41 is moved. The cutting adjustment member 38 can be fixed at a desired position. As shown in FIG. 8, a stopper abutting portion 44 is formed on the lower rear portion of the fixed cover 17 corresponding to the slide piece 41 which is the stopper. By tightening the notch fixing knob 40 in a state where the stopper contact portion 44 is in contact with the slide piece 41 of the stopper whose position has been adjusted, the amount of protrusion of the cutting tool 15 below the base 19 is regulated, and the work piece is cut off. The cutting depth is set to a constant value. Therefore, even if the depth of cut is changed according to the size of the work material by loosening the depth of cut fixing knob 40,
If the stopper abutment portion 44 is brought into contact with the slide piece 41 and the cut fixing knob 40 is tightened, the previous cutting depth set by this stopper can be immediately reproduced.

Next, the operation of the circular saw having the above construction will be described.

As shown in FIG. 1, the blade 15 of the circular saw body M
When arranging at right angles to the base 19, the two fulcrum shafts 3 are provided in the two fulcrum holes 26 and 27 of the front standing member 24.
The large-diameter shaft portions 30b and 31b of 0 and 31 are inserted, and the male screws of the small-diameter shaft portions 30c and 31c are screwed into the female screws of the tilt bracket 32 and tightened. Similarly, the screw of the screw shaft 37b of the tilt fixing screw 37 in the rear standing member 25 is tightened. As a result, the blade 15 of the circular saw body M is fixed at a right angle to the base 19. Further, after loosening the cut fixing knob 40, the cut fixing screw is relatively moved along the long groove 38a of the cut adjusting member 38 to move the circular saw body M up and down with the pivot 39 of the tilt bracket 32 as a fulcrum. Tilt and re-tighten the notch locking knob 40. As a result, the circular saw body M is fixed to the base 19 at a desired height, and the blade 15
The amount of protrusion of the underside of the base 19, that is, the cut depth is set to a desired size. After that, the motor cuts the blade 15
Is rotated and the base 19 is slid on the work material, the work material is cut at a cutting plane perpendicular to the surface.

Further, as shown in FIG. 4, when the blade 15 of the circular saw body M is set to be inclined with respect to the base 19 in one direction, one of the fulcrum shafts 31 on the front standing member 24 side is set. The large-diameter shaft portion 31b is left inserted in the corresponding fulcrum hole 27, and the other fulcrum shaft 30 is turned in the direction of loosening the screw to disengage the large-diameter shaft portion 30b from the fulcrum hole 26 and the small-diameter shaft portion 30c. To the arc-shaped elongated hole 28. Further, the screw of the screw shaft 37b of the tilt fixing screw 37 on the rear standing member 25 side is loosened. Then, one fulcrum shaft 31
With the large-diameter shaft portion 31b as the fulcrum, the circular saw body M is tilted in the direction in which the motor case 16 approaches the base 19.
Along with this, the small-diameter shaft portion 30c of the other fulcrum shaft 30 moves from the fulcrum hole 26 to the arc-shaped elongated hole 28. When the blade 15 of the circular saw body M is inclined at a desired angle with respect to the base 19, the knob 30a on the front standing member 24 side and the knob 37a on the rear standing member 25 side are turned to tighten the screws, Fix M to the tilted position. The inclination angle of the blade 15 of the circular saw body M is such that the small-diameter shaft portion 30c of the other fulcrum shaft 30 is brought into contact with one end of the arc-shaped elongated hole 28, and the projection 35 of the inclined bracket 32 is brought into contact with the upper end of the adjustment screw 34. By contacting them, they can always be kept constant. Further, the position of the cutting adjusting member 38 is adjusted in the same manner as described above to adjust the cutting depth. After that, when the blade 15 is rotated by a motor and the sliding surface 19a and the guide surface 19b of the base 19 are applied to the work material, such as a floor plate and a wall plate, to slide,
The floor plate can be cut from the wall without leaving any uncut residue.

Further, as shown in FIG. 5, when the blade 15 of the circular saw body M is set to be inclined with respect to the base 19 in the other direction, the other fulcrum shaft 30 on the front standing member 24 side is set. The large-diameter shaft portion 30b is left inserted in the corresponding fulcrum hole 26. Then, one of the fulcrum shafts 31 is turned in the direction of loosening the screw to disengage the large-diameter shaft portion 31b from the fulcrum hole 27, and the small-diameter shaft portion 31c is exposed to the arc-shaped elongated hole 29. In addition, the tilt fixing screw 3 on the rear standing member 25 side
Loosen the screw of the screw shaft 37b of No. 7. Thereafter, the circular saw body M is tilted in the direction in which the motor case 16 thereof is separated from the base 19 with the large-diameter shaft portion 30b of the other fulcrum shaft 30 as a fulcrum. Along with this, the small-diameter shaft portion 31 of the one fulcrum shaft 31
c moves from the fulcrum hole 27 to the arcuate slot 29, and slides in the arcuate slot 29. When the blade 15 of the circular saw body M is tilted at a desired angle with respect to the base 19, the knob 31a on the front standing member 24 side and the knob 37a on the rear standing member 25 side are turned to tighten the screws. M is fixed in the inclined position. Further, the position of the cutting adjusting member 38 is adjusted in the same manner as described above to adjust the cutting depth. After that, the blade 15 is rotated by the motor and the base 19
When the tool is slid on the work material, the work material can be cut with a cutting surface inclined by, for example, 45 degrees with respect to the surface, as in a normal circular saw.

[0041]

According to the first aspect of the present invention, the motor, the blade driven by the motor, the motor case housing the motor, and the substantially upper half of the blade mounted on the motor case are covered. In a circular saw having a circular saw body composed of a fixed cover and a fixed cover of the circular saw body or a motor case that is tiltably connected to the base via a tilting fulcrum, at least two types of tilting fulcrums can be switched. Since the circular saw body is a circular saw that can be tilted bidirectionally with respect to the base by being provided, it is possible to set the inclinations of the blades with respect to the base in opposite directions by properly using the tilting fulcrum. It is possible, therefore, to cut the work piece at a desired angle of cut surface with a single circular saw, and for example, to cut the floor plate by the wall so that no uncut residue occurs. It is possible and.

According to the invention of claim 2, in the circular saw according to claim 1, the base is provided with a standing member, and the standing member is connected to the fulcrum hole of each tilt fulcrum and each fulcrum hole. It has an arc-shaped elongated hole that is narrower than the fulcrum hole that curves around other fulcrum holes, and the fulcrum shaft of each tilt fulcrum has a large diameter shaft part that fits into each fulcrum hole and an arc-shaped elongated hole. Since it has a small-diameter shaft portion to be fitted, the large-diameter shaft portion of the fulcrum shaft is fitted into the fulcrum hole with the large-diameter shaft portion of the fulcrum shaft removed from the fulcrum hole at one tilt fulcrum By tilting the circular saw body using the tilting fulcrum as a fulcrum, the blade can be tilted to one side with respect to the base, and at the other tilting fulcrum with the large diameter shaft part of the fulcrum shaft removed from its fulcrum hole. , Circular saw body with one tilt fulcrum where the large-diameter shaft part of the fulcrum shaft fits into the fulcrum hole By tilting, the blade can be tilted to the other side with respect to the base, so it is possible to easily tilt the circular saw body in either direction with respect to the base without pulling out the fulcrum shaft from the fulcrum hole or arc-shaped elongated hole. You can

According to the invention of claim 3, in the circular saw according to claim 1 or 2, a male screw screwed to the fixed cover side or the motor case side is formed on the small diameter shaft portion of the fulcrum shaft. Since the fulcrum shaft for tilting the circular saw body with respect to the base and the fixing screw for fixing the tilt are integrated, cost reduction is realized by reducing the number of parts, and the product size is further reduced. It is made compact.

According to the invention of claim 4, a motor,
A circular saw body having a blade driven to rotate by a motor, a motor case accommodating the motor, and a fixing cover for covering substantially the upper half of the blade attached to the motor case is provided. In a circular saw in which a cover or a motor case is tiltably connected to a base via a tilt fulcrum, a cut adjusting member is provided between the fixed cover and the base, and the position of the fixed cover with respect to the cut adjusting member is restricted. Since the stopper for setting the cutting depth is a circular saw provided on the cutting adjustment member so that the position can be changed, the desired cutting depth can be stored by fixing the stopper to the cutting adjustment member. Therefore, even if the cutting depth is changed according to the size of the work material, it is possible to immediately reproduce the cutting depth set by the stopper without checking it with a scale. That.

[Brief description of drawings]

FIG. 1 is a front view of a circular saw according to the present invention.

FIG. 2 is a left side view of the circular saw shown in FIG.

FIG. 3 is a rear view of the circular saw shown in FIG.

FIG. 4 is a front view of the circular saw body in which the circular saw body is tilted from the state shown in FIG. 1 in a direction in which the motor case approaches the base.

5 is a front view of the circular saw in which the circular saw body is tilted from the state shown in FIG. 1 in a direction in which its motor case is separated from the base.

FIG. 6 is a front view of a front standing member.

FIG. 7 is an elevation view showing the front standing member together with the tilt bracket from the left side in FIG.

8 is a cross-sectional view taken along the line VIII-VIII in FIG.

FIG. 9 is a side view of a conventional circular saw.

[Explanation of symbols]

M ... Circular saw body 15 ... cutlery 15a ... Shaft of blade 16 ... Motor case 17 ... Fixed cover 19 ... Base 22, 23 ... Tilt fulcrum 24 ... Standing member 26, 27 ... fulcrum hole 28, 29 ... Arc-shaped oblong holes 30, 31 ... fulcrum shaft 30b, 31b ... Large diameter shaft 30c, 31c ... Small diameter shaft 38 ... Cut adjustment member 41 ... slide piece

Claims (4)

[Claims] 1. A circular saw body having a motor, a blade rotationally driven by the motor, a motor case for housing the motor, and a fixed cover for covering substantially the upper half of the blade attached to the motor case. In the circular saw in which the fixed cover of the circular saw body or the motor case is tiltably connected to the base via the tilt fulcrum, at least two kinds of tilt fulcrums are switchably provided so that the circular saw body is A circular saw characterized by being able to tilt in both directions relative to the base. 2. The base is provided with an upright member, and the upright member is a fulcrum hole of each tilt fulcrum and a circle narrower than a fulcrum hole connected to each fulcrum hole and curved around another fulcrum hole. An arc-shaped elongated hole is provided, and a fulcrum shaft of each tilting fulcrum has a large-diameter shaft portion fitted into each fulcrum hole and a small-diameter shaft portion fitted into the arc-shaped elongated hole. Circular saw described in. 3. The circular saw according to claim 1, wherein a male screw that is screwed to the fixed cover side or the motor case side is formed on the small diameter shaft portion of the fulcrum shaft. 4. A circular saw body having a motor, a blade rotationally driven by the motor, a motor case for housing the motor, and a fixed cover for covering substantially the upper half of the blade attached to the motor case. In the circular saw in which the fixed cover of the circular saw body or the motor case is tiltably connected to the base via a tilting fulcrum, a cut adjustment member is provided between the fixed cover and the base. A circular saw, wherein a stopper for setting a cutting depth by regulating the position of the fixed cover with respect to the cutting saw is provided on the cutting adjustment member so that the position can be changed.