JP2001315101A - Apparatus for adjusting cutting edge position of cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for adjusting a cutting edge position of a simple adjusting operation since in the apparatus for adjusting the cutting edge position for adjusting a clearance between the cutting edge and a wall part so that the wall part is not damaged by the cutting edge in the case of using the cutting edge of a different plate thickness for, for instance, a portable circualr saw of a brink cutting use for cutting a floor material by the wall, a conventional structure is provided wherein two pieces of guide rods protruded to a side from a base are independently slid, and the adjusting operation is troublesome. SOLUTION: A structure is provided wherein a guide plate 31 having integrally two pieces of guide arm parts 31b protruded from a side part of the base 8 to the wall part K is provided; the guide plate 31 is moved in a face direction of the base 8, a protruded size from the side part of the base 8 of the guide arm part 31b is changed to adjust a position in a cutting width direction to the wall part K of the cutting edge 3, and a fixing screw 32 at one position is fastened in to fix a position to the base 8 of the guide plate 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a portable cutting saw for adjusting a position of a cutting blade with respect to a side end of a base to be brought into contact with a wall in accordance with a thickness of the cutting blade. Related to the device.

[0002]

2. Description of the Related Art In general, a portable circular saw has a base mounted on a cutting material, a base that can be tilted up and down (a mechanism for adjusting a cutting depth), and a base that can be tilted in a plane direction of a cutting blade (an inclined cutting function, It has a circular saw body that is supported by the edge cutting function. In addition, such a portable marunoco is provided with a portable marunoco (bordered marunoco) suitable for cutting a floor material along a wall in order to replace a floor of a house, for example. For example, Japanese Patent No. 2933196
In this publication, a technique relating to the cutting circle saw is disclosed.

[0003] In general, the above-mentioned cutting edge saw cuts a floor material by inclining a cutting blade in a direction of swinging a lower end portion toward a wall portion, and moving the cutting machine along the wall in the inclined state. Conventionally, when cutting a circular saw, according to the thickness of the cutting blade to be used, by appropriately maintaining the distance between the cutting blade and the wall, the floor material can be cut along the wall without damaging the wall by the cutting blade. There is known a cutting technique, and a cutting blade position adjusting device is provided as a means for appropriately maintaining a distance between the cutting blade and a wall portion.
The conventional cutting blade position adjusting device includes two guide rods that protrude sideways from two front and rear portions of the base and abut against the wall, and appropriately adjust the protrusion dimensions of the two guide rods. It was configured to adjust and hit the wall.

[0004]

As described above, according to the conventional cutting blade position adjusting device, the two guide rods are separately slid to adjust the protruding dimensions, and are fixed separately. Adjustment work was troublesome. SUMMARY OF THE INVENTION It is an object of the present invention to provide a cutting blade position adjusting device in which the adjusting operation is easier than in the past.

[0005]

SUMMARY OF THE INVENTION To this end, the present invention provides a cutting blade position adjusting device having the structure described in the above claims.
According to the cutting blade position adjusting device of the first aspect, the two guide arms (corresponding to the conventional guide rod) integrally provided on the guide plate move integrally by the movement of the guide plate. It is not necessary to separately set the protruding dimensions from the base as in the above case, and in this point, the usability is good. In addition, since the position of the guide plate can be fixed by one fixing screw, the operation is simpler than in the conventional case where the fixing screws are separately tightened for the two guide rods to fix the position. With this, the protrusion size of the guide arm can be fixed.

According to the cutting blade position adjusting device of the second aspect, the guide plate is moved in parallel by the parallel link mechanism.
The protrusion dimension of the guide arm from the base can be set more easily and reliably.

According to the cutting blade position adjusting device of the third aspect, the guide plate moves in the direction inclined with respect to the cutting width direction (guide plate sliding direction), so that the protrusion dimension of the guide arm changes, that is, the wall changes. The change in the distance between the section and the cutting blade is smaller than the moving distance of the guide plate in the guide plate sliding direction.
For this reason, the fine adjustment of the protrusion size of the guide arm, that is, the distance between the wall and the cutting blade can be performed more easily.

According to the cutting blade position adjusting device of the fourth aspect, the fixing plate is inserted in one long slot and the guide pin is inserted in the other long slot, so that the guide plate slides in the guide plate sliding direction. It is movably supported. The guide plate is entirely fixed to the base by tightening a fixing bolt inserted into one long slot. If the fixing bolt is loosened, the guide plate can be moved in the guide plate sliding direction.
The fixing bolt and the guide pin move relative to each other along the long slot. The rattling of the guide plate with respect to the base due to the clearance in the width direction of the long groove hole with respect to the fixing bolt and the guide pin is reduced in the cutting width direction because the long groove hole is inclined with respect to the cutting width direction. Also in this respect, the protrusion dimension of the guide arm portion of the guide plate can be set more accurately.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to FIGS. In the first and second embodiments described below, a so-called edge cutting portable circular saw 1 is illustrated as an example of a cutting machine. In the present embodiment, a case where the floor surface is cut along a wall by using a portable cutting saw 1 at this time in order to replace the floor is exemplified. Therefore, in the case of the present embodiment, the floor material corresponds to the cut material described in the claims. Therefore, in the following description, the cut material is simply referred to as a floor material (or floor surface) W.

The portable circular saw 1 has a base 8 to be placed on the floor material W during the cutting operation, and a cutting blade 3 arranged on the upper surface side (front side in FIG. 1) of the base 8 and rotated by the motor 2. A cutting machine body 4 is provided. Further, the cutting blade position adjusting device 3 according to the first embodiment is provided on the upper surface of the base 8.
0 is attached. This cutting blade position adjusting device 30
In order to prevent the wall K from being damaged by the cutting blade 3 whose lower end has been shaken toward the wall K during the edge cutting operation, the distance (cut width) between the wall K and the cutting blade 3 is set. It has the function of holding properly. In the present embodiment, the cutting blade position adjusting device 3
0, the cutting blade position adjusting device 3
Configurations other than 0 do not require any particular changes as compared to the conventional configuration, but will first be briefly described below, and then the cutting blade position adjusting device 30 will be described.

As shown in FIG. 2, the cutting machine main body 4 has a blade case 6 which covers the upper part of the cutting blade 3.
Both ends of the blade case 6 are supported by the base 8 via tilt support portions 5, 5, whereby the cutting machine body 4 tilts in the direction in which the lower end side of the cutting blade 3 swings toward the wall K side. Can be done. Fixing screw 5 for tilting support parts 5
If the a and 5a are loosened, the cutting machine main body 4 can be inclined, and if the fixing screws 5a and 5a are tightened, the inclined position of the cutting machine main body 4 can be fixed. Cutting machine body 4
When the cutting blade 3 is set upright as shown in FIG. 3, the line of intersection of the plane passing through the center of the cutting blade 3 in the plate thickness direction and the plane passing through the lower surface of the base 8 is defined by the tilt axis P. Each part is set so as to tilt.

As described above, this embodiment exemplifies the so-called edge cutting portable circular saw 1 as an example of a cutting machine. At this time, the portable cutting saw 1 is cut in a state where the cutting machine main body 4 is inclined in a direction (clockwise in FIG. 2) in which the lower end side of the cutting blade 3 is swung toward the wall K side as shown in the figure. It is characterized in that the blade 3 is cut into the cutting material W, and the cutting is performed by moving the blade 3 along the wall in this cut state. Therefore, the portable marunouchi 1 of the present embodiment
In this case, the cutting machine main body 4 has a position where the cutting blade 3 is set upright (right-angled cutting position) and about 45
あ り It can be tilted between the shake position (edge position)
Further, in this cutting machine body 4, the motor 2 and the cutting blade 3
Are supported so as to be vertically movable with respect to the blade case 6. Hereinafter, tilting the cutting machine main body 4 in the direction of swinging the lower end portion side of the cutting blade 3 toward the wall K side is referred to as “tilting the cutting machine main body 4 to the edge side”. In order to incline the cutting machine main body 4 to the cutting side at a maximum of about 45 °, the motor 2 swings its rear end side upward by about 45 ° with respect to the cutting blade 3 (with respect to the rotation axis of the cutting blade 3). (In a state where the rotation axis of the motor 2 is inclined by about 45 °), thereby avoiding interference between the rear end of the motor 2 and the base 8. FIGS. 1 and 2 (similar to FIGS. 5 and 6 showing the second embodiment)
Indicates a state in which the cutting machine body 4 is inclined by about 45 ° to the edge side. Therefore, in FIG. 1 (FIG. 5),
The cutting blade 3, the blade case 6, and the handle portion 7 are seen inclined (from obliquely above).

The motor 2 is arranged so as to extend laterally from the back side (the right side in FIG. 1) of the blade case 6. As shown in FIG. 3, the motor 2 and the cutting blade 3 rotated by the motor 2 are supported movably up and down within a certain range H with respect to the blade case 6,
It is urged upward by a compression spring (not shown). A handle 7 is provided on the upper part of the motor 2 so as to be gripped by an operator during a cutting operation or the like. This handle part 7
Is held down and the motor 2 and the cutting blade 3 are pushed down, whereby the cutting blade 3 is cut into the cutting material W. FIG. 2 shows a state in which the motor 2 and the cutting blade 3 are pushed down, and FIG. 3 shows a state in which the cutting blade 3 is returned upward by the compression spring (non-use state of the portable circular saw 1) by a solid line. This is indicated by a two-dot chain line. The cutting material 3 is cut along the wall K by cutting the cutting blade 3 into the cutting material W and moving the portable saw blade 1 in the cutting direction in the cut state.

Next, the cutting blade position adjusting device 30 of the first embodiment has a guide plate 31 slidably provided along the upper surface of the base 8. As shown in FIG. 1, the guide plate 31 has a substantially U-shape in plan view, and includes a connecting plate portion 31a along the longitudinal direction of the base 8 and a connecting plate portion 31a.
Guide arms 31b, 3 provided to bend laterally from both ends of
1b. The two guide arms 31b, 31b protrude from the side of the base 8 on the wall K side (the left side in the figure) toward the wall K. The leading ends of the two guide arms 31b, 31b are bent upward to form guide edges 31c, 31c, and the two guide edges 31c, 31c abut against the wall K during the cutting operation. FIG. 1 shows a state in which the two guide edges 31c, 31c are separated from the wall K, while FIG. 2 shows a state in which both the guide edges 31c, 31c are abutted against the wall K. .

Each of the guide arms 31b, 31b has an angle θ with respect to a direction perpendicular to the wall K (the direction of the axis of rotation of the cutting blade 3, the left-right direction in the drawing, hereinafter referred to as the “cutting width direction Dw”). A long slot 31d long is formed along the direction inclined in the plane direction of the base 8. Double long slot 31
d and 31d are formed parallel to each other. In FIG. 1, a fixing screw 32 is inserted into the lower slot 31d on the lower side. The fixing screw 32 is screwed into a screw hole 8a of the base 8 as shown in FIG. On the other hand, a guide pin 33 is inserted into the upper slot 31d in FIG. The guide pins 33 protrude from the upper surface of the base 8. The clearance between the guide pin 33 and the long slot 31d is set as small as possible, and the backlash between the two is minimized.

When the fixing screw 32 is loosened, the guide plate 31 can be slid along the upper surface of the base 8 in the guide plate sliding direction Ds. Can be fixed. When the guide plate 31 is slid, the two guide arms 31b, 31b
Move integrally in the cutting width direction Dw.
Of the protruding portion from the side changes.

Further, as described above, both long slots 31d, 3d
1d is formed to be long along the direction inclined by the angle θ with respect to the cutting width direction Dw, so that the direction in which the guide plate 31 slides (hereinafter, referred to as the guide plate sliding direction Ds) is the cutting width direction Dw. With respect to the angle θ. This relationship is shown in FIG. As shown in the figure, since the guide plate slide direction Ds is inclined by the angle θ with respect to the cutting width direction Dw, the reference position of the guide plate 31 (the guide edge 31c coincides with the surface of the cutting blade 3 on the wall K side). Position, the same shall apply hereinafter) and the moving distance L1 in the guide plate sliding direction Ds from the reference position of the guide plate 31 to the cutting width direction Dw.
Is represented by the following equation: L2 = L1 · COSθ <L1. From this, the cutting width direction D of the guide edge 31c is
The moving distance L2 of w is the actual moving distance L1 of the guide plate 31.
Smaller than.

Next, a scale 31e indicating the moving distance L2 of the guide plate 31 in the cutting width direction Dw is displayed on the lower guide arm 31b of the guide plate 31 in FIG. On the other hand, a reference line 8b is displayed on the upper surface of the base 8,
By reading the scale 31e indicated by the reference line 8b, the displacement of the guide plate 31 from the reference position (movement distance L
2) can be confirmed. In the case of this embodiment, FIG.
When the cutting machine body 4 is positioned at the right angle cutting position and the guide plate 31 is positioned at the reference position as shown in FIG.
The front surfaces of 1c and 31c coincide with the surface of the cutting blade 3 on the side of the wall K, and at this time, the scale "0" is indicated by the reference line 8b. From this state, move the cutting blade 3 to the edge side by about 45 °.
The inclined state is shown in FIGS. 1 and 2. In this case, the cutting blade 3 is cut at the intersection of the wall K and the floor material W.

Further, as described above, when the tilting axis P of the cutting machine body 4 is positioned at the right angle cutting position and the cutting blade 3 is set upright, the cutting blade 3 It is set at the line of intersection of a plane passing through the center in the thickness direction and a plane passing through the lower surface of the base 8. Therefore, the cutting blade 3 is always cut into the floor material W through the tilt axis P regardless of the tilt position of the cutting machine body 4.

According to the cutting blade position adjusting device 30 of the first embodiment configured as described above, prior to the edge cutting operation,
The cutting blade position adjusting device 30 is set in accordance with the cutting width (the distance between the wall K and the cutting blade 3). The setting of the cutting blade position adjusting device 30 is performed by loosening the fixing screw 32 and moving the guide plate 31 along the guide plate slide direction Ds, thereby protruding the two guide arms 31b, 31b (the position of the guide plate 31). This is done by adjusting. When the guide plate 31 is moved by the distance L1 in the guide plate slide direction Ds, the guide plate 31 moves in the cutting width direction Dw by the distance L2 (= L1 · COS).
θ). The setting of the moving distance L2 can be accurately performed while checking the scale 31e.

After setting the cutting blade position adjusting device 30 in this way, the two guide edges 31 of the cutting blade position adjusting device 30 are set.
The c and 31c are brought into contact with the wall K, and then the handle 7 is gripped to push the motor 2 and the cutting blade 3 downward against the compression spring. The cutting blade 3 is cut into the floor material W by activating the motor 2 while pushing down the cutting blade 3. As described above, the cutting blade 3 is cut into the floor material W via the tilt axis P of the cutting machine main body 4. After the motor 2 and the cutting blade 3 are pushed down to the lower limit and the cutting into the floor material W by the cutting blade 3 is completed, the portable circular saw 1 is moved in the cutting direction while maintaining this cutting state. As a result, the cut material W is sharply cut along the wall (while maintaining a constant cutting width from the wall portion K).

As described above, according to the cutting blade position adjusting device 30 of the present embodiment, since the two guide rods whose positions have been separately adjusted in the past are integrated, the two guide arm portions 31 are formed.
The adjustment of b and 31b can be performed at once. Moreover,
Since the sliding direction Ds of the guide plate 31 is inclined by the angle θ with respect to the cutting width direction Dw, the two guide arms 31b, 31b are cut by a distance L2 shorter than the distance L1 at which the guide plate 31 is actually slid. It moves in the width direction Dw. From this, it becomes easy to finely adjust the protrusion dimension (displacement amount) of the guide arms 31b, 31b in the cutting width direction Dw. On the other hand, since the conventional guide rod is configured to slide in the cutting width direction Dw, the actual sliding distance is the displacement distance of the guide rod in the cutting width direction as it is. It was difficult. In addition, both long slots 3
Since 1d and 31d are inclined with respect to the cutting width direction Dw, the rattling in the rotation direction of the guide plate 31 around the fixing screw 32 can be reduced as compared with the case where the inclination is not inclined, for example. The guide plate 31 can be accurately positioned.

Various modifications can be made to the cutting blade position adjusting device 30 of the first embodiment described above. FIGS. 5 and 6 show a cutting blade position adjusting device 30 according to a second embodiment of the present invention. The cutting blade position adjusting device 40 according to the second embodiment is different from the cutting blade position adjusting device 30 according to the first embodiment in the mode of moving the guide plate 41. Other points that are the same as those of the cutting blade position adjusting device 30 and those that are the same as those of the first embodiment, such as the cutting machine body 4, are denoted by the same reference numerals, and description thereof is omitted.

The guide plate 41 has a substantially U-shape in plan view similarly to the guide plate 31 of the first embodiment.
Connecting plate portion 41a along the longitudinal direction of
Guide arm 41 provided to bend laterally from both ends of 1a
b, 41b. The two guide arms 41b, 41b protrude toward the wall K from the side of the base 8 on the wall K side (the left side in FIG. 5). Both guide arms 41b, 4
The tip of 1b is bent upward, and this bent portion is brought into contact with the wall K by the guide edges 41c,
41c.

One end of a link arm 42 is connected to the bases of the guide arms 41b, 41b via support shafts 42a so as to be rotatable in the surface direction of the base 8. The other ends of the link arms 42 are connected to the upper surface of the base 8 via support shafts 42b so as to be rotatable in the surface direction of the base 8. The center distance between the support shaft 42a and the support shaft 42b in each of the two link arms 42 is set to the same value. Also, between the link arms 42, 42, the distance between the support shafts 42a and the support shaft 42a and the support shaft 4
The center distance between the shaft 2b and the support shaft 42b is also set to the same value. Thus, the guide plate 41, the two link arms 42, 42, and the base 8 constitute a four-node parallel link. For this reason, the guide plate 41 moves in parallel.
The moving direction of the guide plate 41 is a direction inclined by an angle θ with respect to the cutting width direction Dw as in the first embodiment (guide plate slide direction Ds, see FIG. 4). In FIG. 5, an arc-shaped long slot 41d is formed in the lower guide arm 41b. The long slot 41d is formed along an arc centered on the lower support shaft 42b in the figure. This slot 4
As in the first embodiment, a fixing screw 43 is inserted through 1d, and the fixing screw 43 is screwed into a screw hole 8a of the base 8.

As shown in FIG. 5, a stopper 44 for regulating the moving end of the guide plate 41 is provided at the lower end of the base 8 in the figure. When the guide plate 41 is moved in a direction in which the link arms 42, 42 are rotated counterclockwise in the drawing around the support shaft 42b, the guide plate 41 moves in parallel, and the two guide arms 41b, 41b are moved. It moves in a direction approaching the wall K. When the guide arm 41b protrudes from the end of the base 8 by a predetermined size as shown by a two-dot chain line in FIG. 5, the side of the guide arm 41b is
, The movement of the guide plate 41 on the protruding side is restricted.

According to the cutting blade position adjusting device 40 of the second embodiment configured as described above, when the fixing screw 43 is loosened, the guide plate 41 can be moved. Both guide arms 41b,
41b moves integrally. Therefore, similarly to the first embodiment, it is not necessary to separately adjust the two separately provided guide rods as in the related art, and in this regard, the adjusting operation of the cutting blade position adjusting device 40 can be easily performed. It can be carried out. Further, the guide plate 41 is circularly moved by the four-bar parallel link mechanism, and the moving direction is always the direction inclined with respect to the cutting width direction Dw, as in the first embodiment. The same operation and effect as in the embodiment can be obtained. Furthermore, the cutting blade position adjusting device 40 of the second embodiment
Is a guide plate 4 via a four-bar parallel link mechanism (positive movement mechanism).
1, the guide plate can be moved without rattling in a direction other than the moving direction, and as a result, the guide plate can be further more accurately compared to the cutting blade position adjusting device 30 of the first embodiment. 41 can be performed.

In the above-described first and second embodiments, the case where the cutting blade position adjusting devices 30 and 40 are applied to the so-called edge-cut portable circular saw 1 is exemplified. For example, the cutting blade is inclined to the opposite side. In other words, the present invention may be applied to a general portable circular saw that performs so-called diagonal cutting (by tilting the lower end of the cutting blade toward the lower surface of the base).
In addition, the configuration in which the guide edges 31c, 31c (41c, 41c) are bent upward has been exemplified. However, the guide edges 31c, 31c are bent downward to abut against the edge of the cut material (corresponding to the wall described in the claims). It can also function as a cutting blade position adjusting device in the case where the cut material is cut at a constant width from its edge (in the case of diagonal cutting). Furthermore, although a saw with a rotating saw blade has been illustrated as a cutting machine, the cutting blade position adjusting device illustrated in the reciprocating cutter for reciprocating and cutting a saw blade such as a reciprocating saw or a jigsaw can also be applied.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of the present invention, and is a plan view of a portable circular saw for edge cutting. This figure shows a state where the lower end of the cutting blade is swung toward the wall.

FIG. 2 is a front view of the portable cutting tool for edge cutting according to the first embodiment. This figure shows a state where the cutting blade is inclined to the edge side.

FIG. 3 is a front view of a portable circular saw for edge cutting. This figure shows a state where the cutting blade is positioned at a right angle cutting position.

FIG. 4 illustrates a cutting blade position adjusting device according to a first embodiment.
It is a figure which shows the relationship between the slide operation of a guide plate, and the amount of displacement of the guide arm part in the cutting width direction. This figure shows the guide arm in a plan view.

FIG. 5 is a view showing a second embodiment of the present invention, and is a plan view of a portable mushroom for edge cutting. This figure shows a state where the lower end of the cutting blade is swung toward the wall.

FIG. 6 is a front view of a portable cutting mushroom for edge cutting according to the second embodiment. This figure shows a state where the cutting blade is inclined to the edge side.

[Explanation of symbols]

W: cutting material (floor material), K: wall P: tilting axis 1: portable circular saw for edge cutting (first embodiment) 2: motor, 3: cutting blade, 4: cutting machine body, 5: tilting support Part 8: Base 30: Cutting blade position adjusting device (first embodiment) 31: Guide plate, 31a: Connecting plate, 31b: Guide arm 32: Fixing screw 33: Guide pin Dw: Cutting width direction, Ds: Guide Plate sliding direction, Dc ...
Cutting direction θ: Inclination angle of guide plate sliding direction Ds with respect to cutting direction Dw 40: Cutting blade position adjusting device (second embodiment) 41: Guide plate 42: Link arm

Claims (4)

[Claims] 1. A cutting machine, comprising: a base mounted on a cutting material; and a cutting machine body having a cutting blade, wherein the cutting blade is moved along a wall to cut the cutting material. A cutting blade position adjusting device for adjusting a position in a cutting width direction with respect to the wall portion, comprising a guide plate integrally having a plurality of guide arms protruding from a side portion of the base toward the wall portion. Moving the guide plate in the plane direction of the base to change the protrusion size of the guide arm from the side of the base to adjust the position of the cutting blade in the cutting width direction with respect to the wall portion; And 1
A cutting blade position adjusting device configured to fix a position of the guide plate with respect to the base by tightening fixing screws at various locations. 2. The cutting blade position adjusting device according to claim 1, wherein a parallel link mechanism is interposed between the guide plate and the base to move the guide plate in parallel along the surface direction of the base. A cutting blade position adjusting device having a configuration. 3. The cutting blade position adjusting device according to claim 1, wherein the guide plate is moved in a direction inclined with respect to a cutting width direction to change a protrusion size of the guide arm. Blade position adjustment device. 4. The cutting blade position adjusting device according to claim 3, wherein one of the guide plate or the base is provided with two long slots in the front and rear direction in a direction inclined with respect to the cutting width direction. The guide plate is fixed to the base by tightening the fixing screw through the hole, and the guide plate or the guide pin provided on the other of the base is inserted into the other long slot, and the guide plate is inclined with respect to the cutting width direction. A cutting blade position adjusting device configured to be movably supported in the direction in which the cutting blade moves.