JP2002331517A - Cutter for joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutter for a joint which can peel a calking seal efficiently, easily, and cleanly. SOLUTION: When a rotary shaft 21 is rotated by a motor 5 installed in a main body case 3, an eccentric shaft 23 fitted to the rotary shaft 21 is rotated. A blade support shaft 43 fitted to a transmission plate 49 is rotated/vibrated by the vibration of the transmission plate 49 by the rotation of the eccentric shaft 23 so that the tips of two blades 65A and 65B fitted to the blade fitting part 43C of the blade support shaft 43 are vibrated. The distance between blades 65A and 65B fitted to the blade support shaft 43 is adjusted by combining spacers 63 having various thicknesses and fitting them to the blade support shaft 43, and the blades 65A and 65B are bonded together by a bonding means 71.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint cutter used for cutting and peeling various sealings and tile joints.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 11, when a caulking seal 203 such as a wall 201 is peeled off, for example, a cutter 205 as disclosed in Japanese Utility Model Publication No. 1-21662 is used. Is used to cut sequentially on both side surfaces 203A and 203B of the caulking seal 203, and an operator pulls it by hand to peel it off.

Referring to FIG. 12, when repairing a crack 209 generated on a wall 207,
The surface of the crack 209A is cut using, for example, a completely separate rotating tool 211 as shown in FIG. 13, and putty is applied to the cut portion to finish it into a flat surface.

[0004]

When the caulking seal 203 is peeled off, a cut is made on both sides of the caulking seal 203, but the inner surface 203
C may be attached to the wall 201, and the work of peeling off the caulking seal 203 is troublesome. Therefore, a cutter has been developed in which the cutter is formed in a U-shape and also cuts the back surface 203C.
Is limited to a fixed interval, and further improvement has been desired. Further, when the caulking seal 203 is peeled off from the wall 201, as shown in FIG.
Since the residue 213 remains on the inner surface 203C and the corner portion and cannot be removed cleanly, it is necessary to clean the residue 213 and finish the side surfaces 203A and 203B.
This finishing work is done using a separate rotating tool,
There is a problem that it is very troublesome.

When repairing the crack 209 on the wall 207, the power tool having the rotary tool 211 as described above is used separately from the power tool having the cutter for peeling the caulking seal. Groove processing is performed to a deep place of the crack 209 of the wall 207, and repair is performed with an appropriate sealing agent such as putty, and thus there is a problem that separate power tools are required.

SUMMARY OF THE INVENTION An object of the present invention is to pay attention to the above-mentioned problems of the conventional technology, and it is possible to efficiently and easily peel off a caulking seal, and to crack a wall or the like. An object of the present invention is to provide a joint cutter capable of performing groove processing.

[0007]

In order to achieve the above object, a joint cutter according to the first aspect of the present invention includes an eccentric shaft provided on a rotary shaft of a motor provided inside a main body case, and a joint provided with the joint. A blade support shaft for mounting a blade to be cut, and a transmission plate for transmitting a displacement in one direction of the eccentric shaft and rotating and vibrating the blade support shaft, and adjusting an interval between two blades mounted on the blade support shaft And a spacer for use in such a case.

Therefore, when the motor provided inside the main body case rotates the rotary shaft, the eccentric shaft attached to the rotary shaft rotates, and the rotational vibration of the transmission plate due to the one-way reciprocal displacement of the eccentric shaft causes the blade to vibrate. The blades are transmitted to the support shaft and vibrate so that the tips of the two blades mounted on the blade mounting portion of the blade support shaft reciprocate.

[0009] Further, 2 attached to the blade support shaft.
The spacing between the blades can be adjusted by adjusting the combination of spacers of various thicknesses.

The joint cutter according to the second aspect of the present invention
The joint cutter according to claim 1, wherein a balancer for canceling vibration of the rotation shaft due to rotation of the eccentric shaft is provided on the rotation shaft.

Therefore, the eccentric shaft and the balancer are attached to the rotating shaft. When the rotating shaft is rotated, the vibration caused by the eccentric shaft and the vibration caused by the balancer are canceled each other, and the vibration of the rotating shaft is prevented. Is done.

The joint cutter according to the third aspect of the present invention comprises:
3. A joint cutter according to claim 2, further comprising a rotary tool mounting means for mounting a rotary tool for rotary processing at a tip of said rotary shaft.

Therefore, a rotary tool for rotary processing is attached to the tip of the rotary shaft on which the balancer is mounted, and the rotary tool can be rotated by rotating the rotary shaft to perform rotary cutting or the like.

The joint cutter of the invention according to claim 4 is
2. The joint cutter according to claim 1, further comprising: an annular belt member wound around the main body case so as to be position-adjustable in a circumferential direction and longer than an outer peripheral length of the main body case, and a handle attached to the belt member. It is a feature.

Therefore, the handle provided on the outside of the main body case can be fixed at a desired position around the main body case.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 show the overall configuration of a joint cutter 1 according to the present invention.
The joint cutter 1 has a motor housing 3 which is a cylindrical main body case, and a motor 5 is provided inside the motor housing 3. Further, an inner flange 9 is provided on the front side (the right side in FIG. 1) which is one end side of the motor housing 3, and a round hole 7 is provided at the center of the inner flange 9; 7
, The rotation bearing 11 of the motor 5 projects forward.

A cylindrical head housing 13 is integrally attached to the front surface of the inner flange 9 by a plurality of screws 15. A cutout opening 19 is provided in a part (lower part in FIG. 1).

The rotating shaft 21 of the motor 5 rotatably supported by the rotating bearing 11 projects forward (to the right in FIG. 1) from the cover surface 17 of the head housing 13.
A cylindrical eccentric shaft 23 is integrally attached to the rotating shaft 21 inside the head housing 13, and a bearing bearing 25 is rotatably attached to the outside of the eccentric shaft 23. Therefore, with the rotation of the eccentric shaft 23, the bearing 25 also rotates eccentrically.

The eccentric shaft 23 and the rotating shaft 21 are integrally fixed by a needle roller 27 penetrating both. Also, the rear surface of the eccentric shaft 23 (the left side surface in FIG. 1).
A sliding washer 29 is attached between the eccentric shaft 23 and the rotary bearing 11 to reduce friction when the eccentric shaft 23 rotates.

Referring also to FIG. 5, an upper side, which is one end of a vertically long support plate 31, is integrally fixed to the front surface of the inner flange 9 of the motor housing 3 by screws 33. I have. The upper portion of the support plate 31 is provided with a round hole 35 into which the rotary bearing 11 is fitted.
5 between the rotating bearing 11 and the support plate 31
A ring 37 is provided.

A through hole 39 is provided at the lower end, which is the other end of the support plate 31, and this portion is provided in the head housing 1.
3 protrudes downward from the opening 19. The through hole 3
A bearing bearing 41 is attached to 9, and the blade supporting shaft 43 is rotatably supported by the bearing bearing 41.

The blade supporting shaft 43 has a cylindrical small diameter portion 4 rotatably supported by a bearing bearing 41.
3A, a columnar middle diameter portion 43B having a larger outer diameter than the small diameter portion 43A by one step, and a polygonal columnar large diameter portion 43C which is a blade mounting portion having a larger one step outer diameter. A screw portion 43D is provided on the front surface. A retaining ring 47 is attached to the rear end (left end in FIG. 1) of the small-diameter portion 43A to prevent it from falling off.

Referring also to FIG. 5, the bearing 25 mounted on the eccentric shaft 23 fits into a support hole 51 provided on an upper side, which is one end of a vertically long transmission plate 49. Have been combined. This support hole 51
The bearing bearing 25 has a vertically long hole so that the bearing 25 can move relatively up and down, and has a gap 53 in the up and down direction. A sliding washer 55 is provided around the support hole 51 on the front surface of the transmission plate 49, and the sliding washer 55 is provided.
A bearing stopper 57 for holding the bearing stopper 25 to prevent the bearing bearing 25 from dropping off and a retaining ring 59 for fixing the bearing stopper 57 are attached.

The round hole 61 provided at the lower part of the transmission plate 49 has a medium diameter portion 43 of the blade support shaft 43.
B is integrally fitted. The lower portion of the transmission plate 49 and the blade support shaft 43 are exposed outside from the opening 19 of the head housing 13.

In the large diameter portion 43C of the blade support shaft 43, a plurality of spacers 63 (here, hexagons are shown as an example) having the same polygonal shape as the large diameter portion 43C (here, hexagons are shown) are provided. For example, two thick spacers 63
A and one small spacer 63B) having one thickness, and a pair of blades 65A and 65B are mounted with the spacer 63 interposed therebetween.

Each of the blades 65A and 65B has a blade portion 67 whose tip portion is bent at a right angle. As shown in FIG. 10, the blade 65A is changed by adjusting the spacer 63 having a different thickness as described above. , 65B interval to the joint 69
And the groove-shaped joint 69 can be removed at one time, so that the work efficiency can be improved.

That is, a plurality of spacers 6 having different thicknesses
In the combination of Nos. 3, the interval between the blades 65A and 65B to be used can be adjusted according to the width of the joint 69.
Also, the pair of blades 65A and 65B are provided with the same polygonal hole as the large diameter portion 43C, and a holding nut 71 as a cup-shaped fastening means screwed into the screw portion 43D of the blade support shaft 43. Thereby, a pair of blades 65
A, 65B are attached. By tightening the holding nut 71, the two blades 65A, 65B
Not only is fixed, but also the blade 65 is pressed against the transmission plate 49 so that the blade support shaft 43 rotates integrally with the transmission plate 49.

With the above configuration, when the motor 5 rotates,
The eccentric shaft 23 integrally attached to the rotating shaft 21 rotates integrally. For this reason, the bearing 25 mounted on the eccentric shaft 23 is also eccentric in the vertical and horizontal directions and rotates about the rotary shaft 21 to move one end of the transmission plate 49 up and down and left and right. However, only one end of the transmission plate 49 is allowed to rotate only by the blade support shaft 43, and the long hole where the eccentric shaft 23 is attached at the upper part of the transmission plate 49 is vertically long, so that the eccentric shaft 23 is vertically Does not move up and down. Therefore, the rotation of the eccentric shaft 23 causes the transmission plate 49 to move the blade support shaft 43.
Reciprocally oscillates left and right (for example, 2 to 5 degrees) around (in the direction of arrow in FIG. 2).

On the other hand, at the tip of the rotating shaft 21 of the motor 5, there is provided a fitting hole 75 as a rotating tool mounting means for mounting a rotating tool 73 of an appropriate shape for performing, for example, rotary cutting or grinding. The rotary tool 7 is
Attach 3 and perform rotary processing. As described above, the eccentric shaft 23 is attached to the rotating shaft 21. The eccentric shaft 23 vibrates with the weight of the eccentric shaft 23 and the center of rotation, that is, the rotating tool 7 is rotated.
Because there is a possibility that the processing position by 3 may shift,
A balancer 77 for canceling vibration around the rotation axis 21 caused by the eccentric shaft 23 is provided at the tip of the set screw 79.
It is attached by.

As a result, since the rotary tool 73 rotates stably, it is possible to prevent the displacement of the processing position and perform accurate rotary processing. That is, the blade 65
After the joint 69 is removed by A and 65B, the joint remaining slightly adhered in the groove can be removed by the rotary tool 73, and the finished surface can be improved.
When a crack or the like is formed on a wall or the like, an appropriately shaped groove can be formed along the crack by using an appropriately shaped rotating tool.

Referring again to FIGS. 1, 2 and 4, on the outer peripheral surface of the front end (right end in FIG. 1) of the motor housing 3, a pair of positioning projections 8 are provided at regular intervals.
1 is provided over the entire circumference. A body protection plate 83 is wound between the pair of positioning projections 81,
The motor housing 3 is protected and reinforced.

A handle holder 85, which is an endless metal belt member, is mounted on the outer side of the main body protection plate 83 so as to be able to adjust the rotational position. The entire length of the handle holder 85 is longer than the outer peripheral length of the main body protection plate 83, and is fixed in a state of being left above (upper side in FIG. 1). Also,
A handle mounting hole 87 is provided at the top of the handle holder 85, and a mounting bolt 91 of the handle 89 passes through the handle mounting hole 87 inward.

Accordingly, the handle 89 is fixed to the handle holder 85 by tightening the mounting bolt 91 with respect to the mounting nut 93 screwed to the mounting bolt 91. At this time, the work is performed by rotating the mounting bolt 91 with respect to the adjusting mounting nut 93 screwed to the mounting bolt 91 of the handle 89 and pressing the tip of the mounting bolt 91 against the outer peripheral surface of the main body protection plate 83. The handle 89 can be securely fixed and attached so that the handle 89 does not shake. When the mounting bolt 91 is loosened with respect to the mounting nut 93, the handle holder 85 is rotatable around the main body protection plate 83. Therefore, the handle 89 is moved to a desired position in the vertical and horizontal directions with respect to the motor housing 3. Can be attached to That is, when the groove 69 is processed along a crack of a wall or the like in the work of removing the joint 69, the processing direction may be variously changed in a vertical direction, a horizontal direction, an oblique vertical direction, or the like. However, the position of the handle 89 can be adjusted to a position with good operability, and the workability is improved.

On the other hand, referring to FIG. 7 and FIG. 8, at the other end of the motor housing 3 (leftward in FIG. 1), a two-part power supply for supplying electric power to the motor 5 is provided. Housings 95L and 95R are attached by screws 97, and a power cord 99 extends rearward.
A volume knob 103 for adjusting the rotation speed of the motor 5 to adjust the frequency of the blade 65 is attached to the rear surface 101 of the power supply unit housing 95L. Although a detailed description of the inside of the power supply housings 95L and 95R is omitted, a substrate 105 is attached to the center of the power supply housings 95L and 95R, and an FET (field effect transistor) is mounted on the substrate 105. 107,
A rectifying bridge 109, a resistor 111, and the like are attached.

With the above configuration, the joint 69 can be removed at a time by using the two blades 65A and 65B that are adjusted to the width of the joint 69 while vibrating, so that the work efficiency is greatly improved. Be improved. At this time, the blade 6 having the blade portion 67 whose tip is bent at a right angle
When 5A and 65B are used, not only the left and right sides but also the back surface of the joint 69 can be cut, and the finishing process or the like can be performed using the rotary tool 73. Can be. Also, the blade 65
By adjusting the interval between A and 65B, joints 69 having various widths can be accommodated.

Further, since the direction of the handle holder 85 for attaching the handle 89 to the motor housing 3 is adjustable, the position of the handle 89 can be changed so that the processing posture is appropriate in accordance with the processing position and the processing direction. And workability can be improved.

Also, since the balancer 77 is attached to the rotating shaft 21 to prevent the rotating shaft 21 from vibrating due to the rotation of the eccentric shaft 23, the rotating tool 73 is attached to the rotating shaft 21 to perform processing such as rotary cutting. Even if it is performed, processing can be performed without any problem.

It should be noted that the present invention is not limited to the above-described embodiment of the present invention, but by making appropriate changes,
It can be implemented in other aspects. That is, in the embodiment of the invention described above, the case where the blades 65A and 65B each having the blade portion 67 whose tip is bent at a right angle is used, but various blades can be used. For example, various blades such as a straight blade for sealing with a backing material, a long blade for deep sealing, and an offset blade for sealing in close contact with glass can be used.

[0039]

As described above, in the joint cutter according to the first aspect of the present invention, when the motor provided inside the main body case rotates the rotating shaft, the eccentric shaft attached to the rotating shaft rotates, and the eccentric shaft is rotated. The vibration of the reciprocating rotation of the transmission plate due to the displacement of the shaft in one direction vibrates the tips of the two blades attached to the blade mounting portion of the blade support shaft, so that both sides of the joint or both sides of the joint are vibrated. And the inner surface can be cut by one operation, and the operation efficiency can be improved.

Further, 2 attached to the blade support shaft
Since the spacing between the blades is adjusted by combining spacers of various thicknesses and the two blades are fixed by the fastening means, the spacing between the blades can be adjusted according to the width of the joint.

In the joint cutter according to the second aspect of the present invention, the eccentric shaft and the balancer are attached to the rotating shaft, and the vibrations that tend to occur are mutually offset, so that the vibration is generated on the rotating shaft. The machining can be performed by attaching a rotary tool to the rotating shaft.

In the joint cutter according to the third aspect of the present invention, since a rotary tool for rotary processing can be attached to the tip of the rotary shaft for processing, finishing after removing the joint, finishing of a wall or the like, or the like can be performed. Groove processing along cracks can be performed.

In the joint cutter according to the fourth aspect of the present invention, an annular belt member provided with a handle is wound around the outside of the main body case and provided at a desired position so that the position can be adjusted. It can be adjusted to a desired position according to the above.

[Brief description of the drawings]

FIG. 1 is an overall view of a joint cutter according to the present invention.

FIG. 2 is a side view as viewed from a direction II in FIG.

FIG. 3 is a side view as viewed from a direction III in FIG. 1;

FIG. 4 is an enlarged view of a portion IV in FIG.

FIG. 5 is a sectional view taken along a line VV in FIG. 4;

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 4;

FIG. 7 is a plan view seen from the VII direction in FIG. 1;

FIG. 8 is a bottom view as seen from the direction VIII in FIG.

9 is a sectional view taken along the line IX-IX in FIG.

FIG. 10 is an explanatory view showing a state where both side surfaces of the joint are cut at a time.

FIG. 11 is an explanatory diagram showing a conventional state of cutting joints.

FIG. 12 is an explanatory view showing a conventional crack.

FIG. 13 is an example of a rotary tool.

FIG. 14 is an explanatory diagram showing a conventional problem.

[Explanation of symbols]

 Reference Signs List 1 joint cutter 3 motor housing (body case) 5 motor 21 rotation shaft 23 eccentric shaft 43 blade support shaft 43C large diameter portion (blade attachment portion) 49 transmission plate 63 spacer 65 blade 71 holding nut (fastening means) 73 rotating tool 77 Balancer 75 Fitting hole (rotary tool mounting means) 85 Handle holder (belt member) 89 Handle 91 Mounting bolt 93 Mounting nut

Claims (4)

[Claims] 1. An eccentric shaft provided on a rotating shaft of a motor provided inside a main body case, a blade supporting shaft for mounting a blade for cutting joints, and a blade for transmitting a displacement in one direction of the eccentric shaft. A joint cutter comprising: a transmission plate for rotating and vibrating a support shaft; and a spacer for adjusting a distance between two blades attached to the blade support shaft. 2. The joint cutter according to claim 1, wherein a balancer for canceling vibration of the rotating shaft due to rotation of the eccentric shaft is provided on the rotating shaft. 3. A joint cutter according to claim 2, further comprising a rotary tool mounting means for mounting a rotary tool for rotary processing at a tip of said rotary shaft. 4. An annular belt member wound around the main body case so as to be position-adjustable in a circumferential direction and longer than an outer peripheral length of the main body case, and a handle attached to the belt member. The joint cutter according to 1, 2, or 3.