JP3231187U - Engraving blade replacement blade and blade mounting device for attaching the engraving blade replacement blade to the impact tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chisel replacement blade capable of suppressing deformation due to an impact when attached to an impact tool and used. SOLUTION: A chisel replacement blade 810 is provided with an embedding 813 formed in a flat plate shape, and a side surface of the embedding 813 is formed in an inclined shape. The chisel blade 810 is provided on the front side of the female screw 309 and on the front side of the male screw portion 420 and the tightening ring 300 in which the tapered hole 308 complementary to the inclined side surface formed in the indentation 813 is formed. It is provided with a tapered portion 430 provided in a tapered shape complementary to the tapered hole 308 and a protruding portion 440 provided on the front side of the tapered portion 430, and reaches the male screw portion 420 from the front end surface. By using a blade mounter having a blade holder 400 having a slit 407 formed with a slit 407 having a width set to the same width as the thickness of the included 813, the tool 900 can be more preferably attached to the impact tool 900. [Selection diagram] Fig. 3

Description

The present invention relates to a chisel blade that can suppress deformation due to impact when attached to an impact tool and used.

When engraving by cutting wood or the like to be cut with a chisel, it is necessary to apply a force to push the cutting edge of the chisel forward. Therefore, when producing a large sculpture with a large amount of cutting, the labor of the sculpture creator is great. Therefore, as an instrument for easier engraving, various electric engraving machines for electrically reciprocating the engraving blade have been developed (see, for example, Patent Document 1) and put on the market.

Japanese Unexamined Patent Publication No. 8-156499

However, in such an electric engraving machine, the output for reciprocating the engraving blade is small, and the cutting ability is insufficient for producing a large sculpture such as a Buddhist statue or a decoration of a temple or shrine building. Also, as a tool with a large reciprocating output, an impact tool using pneumatic pressure called a breaker or hammer chisel is known, but when a chisel is attached to such an impact tool, a strong impact force is applied to the chisel. Since it is added, the chisel attached to the impact tool may be deformed.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a chisel replacement blade capable of suppressing deformation due to impact when attached to an impact tool and used.

In order to achieve at least a part of the above object, the present invention can be realized as the following form or application example.

[Application example 1]
A chisel replacement blade, which is provided with a flat plate-shaped inclusion, and the side surface of the inclusion is formed in an inclined shape. According to this application example, the impact force can be transmitted to the chisel blade through the inclusion of the chisel blade formed in an inclined shape. Therefore, when it is attached to an impact tool and used, it is possible to prevent the chisel blade from being deformed due to the impact.

[Application example 2]
A blade mounting device for mounting the chisel blade according to claim 1 to an impact tool, which is fixed to the blade mounting portion for mounting the chisel blade and the blade mounting portion. The impact tool is provided with a tool mounting portion for mounting the spare blade mounter, and the spare blade mounting portion is formed with a female screw and is formed on an inclined surface formed in the front side of the female screw. On the other hand, a tightening ring having a complementary tapered hole, a male screw portion having a male screw that meshes with the female screw, and a tapered shape provided on the front side of the male screw portion and complementary to the tapered hole. A slit having a formed tapered portion and a protruding portion provided on the front side of the tapered portion, and having a width set to be the same as the thickness of the included portion, reaching the male screw portion from the front end surface. The tool mounting portion has a through hole orthogonal to the central axis of the tool mounting portion, and a front end surface of the tool mounting portion along the central axis. A central hole reaching the through hole is formed, and the impact force applied from the impact tool to the replacement blade mounter is applied to the chisel replacement through the inner surface of the tapered hole and the inclined shape surface. A spare blade mounter that is configured to be transmitted to the blade. By using the blade mounting device of Application Example 2, the chisel blade can be more preferably attached to the impact tool.

An exploded perspective view showing the configuration of a spare blade mounter. Explanatory drawing which shows each structure of the chisel spare blade and the spare blade attachment part. Explanatory drawing which shows a state which attached a chisel blade to an impact tool using a blade mounter.

Hereinafter, modes for carrying out the present invention will be described in the following order.
A. Embodiment:
A1. Spare blade mounter configuration:
A2. Configuration of chisel blade and blade mounting part:
A3. Attaching a chisel blade to an impact tool using a blade mounter:
B. Modification example:

A1. Spare blade mounter configuration:
FIG. 1 is an exploded perspective view showing the configuration of the blade mounting device 10 according to the embodiment of the present invention. The spare blade mounter 10 is an instrument for attaching the chisel spare blade to an impact tool such as a breaker. The specific mounting mode of the chisel blade to the spare blade mounter 10 and the specific mounting mode of the chisel blade to the impact tool using the spare blade mounter 10 will be described later. ..

The chisel blade is attached from the front side, and the blade mounter 10 is attached to the impact tool on the rear side. In the present specification and the present invention, as described above, "front" or "front" means the direction from the impact tool toward the chisel blade, and "rear" or "rear" means forward. The direction opposite to that of the chisel, that is, the direction from the chisel blade to the impact tool.

As shown in FIG. 1, the blade mounting device 10 includes a tool mounting portion 100, a holder connecting portion 200, a tightening ring 300, and a blade holder 400. The spare blade mounter 10 is formed by assembling each of these parts 100, 200, 300, 400 in this order along the central axis C indicated by the alternate long and short dash line. The central axis C is the central axis of the chisel blade, the blade mounter 10, and the impact tool as a whole, and each part 100, 200, 300 constituting the blade mounter 10 or the blade mounter 10. , 400 is also the central axis.

The tool mounting portion 100 has a base end portion 110 provided on the rear side, a shaft portion 130 provided on the front side, and a flange portion 120 provided between the base end portion 110 and the shaft portion 130. doing. The base end portion 110 is a solid member, and has a columnar columnar portion 111 and a tapered portion 112 provided on the rear side of the columnar portion 111 and whose outer diameter decreases toward the rear. The collar portion 120 is a solid disk-shaped member having an outer diameter larger than that of the base end portion 110 and the shaft portion 130.

The shaft portion 130 has a shaft main portion 131 and a truncated cone-shaped (tapered shape) tapered portion 132 that is provided on the front side of the shaft main portion 131 and whose outer diameter decreases toward the front. A through hole 139 orthogonal to the central axis C is formed at the rear end of the shaft 130. Further, the shaft portion 130 is formed so that a central hole 138 along the central axis C reaches from the front end surface to the through hole 139.

Further, in the shaft main portion 131, four flat surface portions 135 parallel to the central axis C are formed in order to prevent the tool mounting portion 100 (replacement blade mounter 10) from rotating about the central axis C. There is. Therefore, the outer shape of the shaft main portion 131 is generally a shape obtained by cutting a cylinder into four planes. If the rotation of the tool mounting portion 100 (replacement blade mounter 10) about the central axis C can be suppressed due to the configuration of the impact tool or the like, the formation of the flat surface portion 135 can be omitted.

The holder connecting portion 200 is a substantially cylindrical member. A rear side taper hole (not shown) whose inner diameter increases toward the rear is formed on the rear side of the holder connection portion 200, and a front side taper hole 208 whose inner diameter increases toward the front side on the front side. Is formed. These tapered holes communicate with each other in the central axis C direction at the central portion of the holder connecting portion 200.

The taper angle and the diameter of the rear end of the taper hole 132 formed on the rear side of the holder connection portion 200 and the taper portion 132 of the tool mounting portion 100 (shaft portion 130) are set to be substantially the same. As a result, the tapered portion 132 of the tool mounting portion 100 bites into the tapered hole on the rear side of the holder connecting portion 200, and the holder connecting portion 200 and the tool mounting portion 100 are fixed. Here, the taper angle is the angle formed by the surface of the tapered portion or the tapered hole and the central axis C in a plane passing through the tapered portion or the tapered hole through the central axis C. As is clear from this, the tapered hole and the tapered portion that bites into the tapered hole have an inclined shape that is inclined with respect to the central axis C, and the tapered hole and the tapered portion are complementary to each other. It has a shape.

The tightening ring 300 is a substantially cylindrical member. A female screw 309 is formed on the rear side of the tightening ring 300. A tapered hole 308 whose inner diameter increases toward the front is formed on the front side of the female screw 309.

The spare blade holder 400 is provided with a rear taper portion 410 provided on the rear side and whose outer diameter is reduced toward the rear, a male screw portion 420 provided on the front side of the rear taper portion 410 and having a male screw formed, and a male screw. It has a front-side tapered portion 430 that is provided on the front side of the portion 420 and whose outer diameter expands toward the front, and a protruding portion 440 that extends further forward from the front-side tapered portion 430. Further, the spare blade holder 400 is formed with a slit 470 for attaching the chisel spare blade from the front side end to the rear side.

The taper angle and the diameter of the front end of the rear taper portion 410 of the spare blade holder 400 and the front taper hole 208 of the holder connection portion 200 are set to be substantially the same. As a result, the rear side taper portion 410 of the spare blade holder 400 bites into the front side taper hole 208 of the holder connection portion 200, and the spare blade holder 400 and the holder connection portion 200 are fixed.

The male screw formed on the male screw portion 420 of the spare blade holder 400 is formed so as to mesh with the female screw 309 formed on the tightening ring 300. Therefore, by rotating the tightening ring 300, the tightening ring 300 can be moved back and forth along the central axis C.

The taper angle of the front taper portion 430 of the spare blade holder 400 and the taper hole 308 formed in the tightening ring 300 are set to be substantially the same. On the other hand, the diameter of the front end is set so that the front side taper portion 430 of the spare blade holder 400 is larger than the taper hole 308 formed in the tightening ring 300. Therefore, by rotating the tightening ring 300 and moving the tightening ring 300 forward, it is possible to deform the blade holder 400 so that the slit 407 is closed.

In this way, by moving the tightening ring 300 forward, the front end of the slit 407 is closed. Therefore, as will be described later, the chisel from the spare blade mounter 10 (replacement blade holder 400). When removing the spare blade, it is possible to prevent the tightening ring from interfering with the chisel blade.

As can be seen from the above description, the tightening ring 300 and the spare blade holder 400 are members that realize a function of attaching the chisel blade 810 to the spare blade mounter 10. Therefore, the tightening ring 300 and the spare blade holder 400 can also be collectively referred to as a "replacement blade mounting portion".

A2. Configuration of chisel blade and blade mounting part:
FIG. 2 is an explanatory view showing the respective configurations of the chisel blade 810 as an embodiment of the present invention, the blade holder 400 of the blade mounter, and the tightening ring 300a. 2 (a) and 2 (b) show the chisel blade 810 as viewed from the front and the side, respectively. 2 (c) and 2 (d) are projections of FIGS. 2 (a) and 2 (b), respectively, passing through the central axis C in a state where the spare blade holder 400 and the tightening ring 300 are assembled. It shows how it was cut in a plane parallel to the surface.

As shown in FIGS. 2A and 2B, the chisel blade 810 is formed in a flat plate shape as a whole. This chisel replacement blade 810 has a spike 811 and a included 813. As shown in FIG. 2A, the built-in 813 is formed in a shape (tilted shape) whose side surface is inclined with respect to the central axis C. Further, the inclusion 813 has a protrusion 814 provided on the rear end side and formed to be narrower in width than the rear end of the inclusion 813.

In the chisel blade 810 illustrated in FIGS. 2 (a) and 2 (b), the spike 811 is flat and is formed as a flat plate as a whole. May be flat plate-shaped, and for example, the spikes may be bent in a V-shape or a U-shape.

As described above, the tightening ring 300 is a substantially cylindrical member in which a female screw 309 and a tapered hole 308 are formed. As shown in FIGS. 2 (c) and 2 (d), the tightening ring 300 is formed with female threads 309 from the rear side to substantially the entire front side, and is formed at the front end portion of the tightening ring 300. , A tapered hole 308 whose inner diameter increases toward the front is formed.

As described above, the spare blade holder 400 is provided on the rear side and is provided on the front side of the rear side taper portion 410 and the rear side taper portion 410 whose outer diameter is reduced toward the rear, and is a male screw portion on which a male screw is formed. It has a 420, a front taper portion 430 provided on the front side of the male screw portion 420 and whose outer diameter expands toward the front, and a protrusion 440 extending further forward from the front taper portion 430.

As shown in FIGS. 2 (c) and 2 (d), the spare blade holder 400 is formed with a central hole 409 along the central axis C on the rear side thereof. The inner diameter of the central hole 409 is formed to be slightly larger than the width of the protrusion 814 of the chisel blade 810 (FIG. 2A). Further, the slit 407 whose width is set to be substantially the same as the thickness of the chisel blade 810 is formed so as to reach the center hole 409 from the front end surface of the blade holder 400.

When the chisel replacement blade 810 is inserted into the slit 407, the protrusion 814 of the chisel replacement blade 810 is inserted into the center hole 409. Then, when the protrusion 814 comes into contact with the inner surface of the central hole 409, the chisel replacement blade 810 is restricted from rotating about the thickness direction.

When the tightening ring 300 is rotated and the tightening ring 300 is moved forward with the chisel replacement blade 810 inserted into the slit 407, the chisel replacement blade 810 is sandwiched by the inner surface of the slit 407. As a result, the chisel blade 810 is prevented from falling off from the blade holder 400.

Further, by moving the tightening ring 300 forward, the tapered hole 308 formed in the tightening ring 300 is pressed against the side surface of the inclusion 813 of the chisel replacement blade 810 formed in an inclined shape. As a result, the impact force applied from the impact tool to the blade mounter is transmitted to the chisel blade 810 via the inner surface of the tapered hole 308 and the side surface of the insert 813, which are mutually complementary inclined surfaces. To. Therefore, it is possible to suppress the deformation of the inclusion 813 because the impact force is suppressed from being applied to the rear end surface of the narrow inclusion 813.

Further, by providing the spare blade holder 400 with the protruding portion 440, as shown by the alternate long and short dash line in FIG. 2A, the spare blade holder 400 (protruding portion 440) is hung on the wide ear 811. It becomes possible. Therefore, it is possible to prevent the chisel replacement blade 810 from bending at the narrow inclusion 813 or the chisel replacement blade 810 from breaking on the front side of the inclusion 813.

In the example of FIG. 2, the protrusion 814 is provided in the insert 813 so as to restrict the rotation of the chisel replacement blade 810, but the chisel replacement blade is sandwiched between the inner surfaces of the slit 407. If the rotation of the blade is sufficiently suppressed, it is possible to omit the protrusion.

A3. Attaching a chisel blade to an impact tool using a blade mounter:
FIG. 3 is an explanatory view showing how the chisel blade 810 is attached to the impact tool 900 by using the blade mounter 10. In FIG. 3, the replacement blade mounting device 10 shows a cross section cut in a plane parallel to the slit 407 passing through the central axis C, and the chisel replacement blade 810 shows the appearance seen from the front. In the example of FIG. 3, after assembling each part 100, 200, 300, 400 constituting the spare blade mounter 10, the tightening ring 300 of the spare blade mounter 10 is rotated, and the chisel blade is replaced by the slit 407. It shows a state in which the 810 is sandwiched and fixed. Further, in FIG. 3, since the cross section of the blade mounting device 10 is drawn, it is formed in the rear taper hole 209 formed in the holder connecting portion 200 and the blade holder 400, which are not shown in FIG. A central hole 409 appears.

As shown in FIG. 3, the impact tool 900 includes a piston 910, a cylinder 920, a cap 930, and a spring 940. The cylinder 920 accommodates the piston 910 and the collar and proximal end provided on the rear side of the chisel. Here, the chisel is a tip tool generally used in the impact tool 900, and the outer shape of the tool mounting portion 100 of the spare blade mounter 10 has the same shape as the rear end portion of the chisel.

The front end portion of the cylinder 920 has an inner diameter expanded so as to accommodate the flange portion 120 of the tool mounting portion 100, and a male screw is formed on the outer surface thereof. A female screw that meshes with the male screw is formed on the bottomed cylindrical cap 930, and the cap 930 is fixed to the cylinder 920 by screwing the cap 930. Further, the cap 930 is formed with a through hole 939 for passing the shaft portion 130 of the tool mounting portion 100. The spring 940 comes into contact with both the collar 120 and the cap 930. As a result, the tool mounting portion 100 is urged toward the rear.

When the impact tool 900 is operated, the piston 910 reciprocates back and forth along the central axis C due to the air pressure of the compressed air that is the power source thereof. Then, when the piston 910 moves forward, the front end of the piston 910 comes into contact with the base end portion 110 of the tool mounting portion 100, and an impact force is applied to the tool mounting portion 100. By transmitting this impact force to the chisel blade 810 via the blade mounter 10, cutting is performed by the blade formed on the chisel blade 810.

B. Modification example:
The present invention is not limited to the above embodiment, and can be implemented in various aspects without departing from the gist thereof. For example, the following modifications are also possible.

B1. Modification 1:
In the above embodiment, the spare blade mounter 10 of the present invention is attached to the pneumatically driven impact tool 900 as shown in FIG. 3, but the spare blade mounter of the present invention has a different configuration of pneumatic pressure. It may be attached to a drive type impact tool or an electric drive type impact tool.

B2. Modification 2:
In each of the above embodiments, in the spare blade mounter 10, a set of two members (tool mounting portion 100 and holder connecting portion 200, and holder connecting portion 200 and spare blade) that are fixedly attached to each other and transmit impact force. The holder 400) is fixed by engaging a complementary tapered surface, but the set of these members may be fixed by using a screw or the like. However, the pair of two members that are fixedly attached to each other and transmit the impact force have a complementary taper in that damage to the blade mounter due to the impact force applied from the impact tool can be suppressed. It is preferable to fix the surface by biting it.

10 ... Spare blade mounter 100 ... Tool mounting part 110 ... Base end part 111 ... Columnar part 112 ... Tapered part 120 ... Flange part 130 ... Shaft part 131 ... Shaft main part 132 ... Tapered part 135 ... Flat part 138 ... Center hole 139 ... Through hole 200 ... Holder connection part 208 ... Front side taper hole 209 ... Rear side taper hole 300 ... Tightening ring 308 ... Tapered hole 309 ... Female screw 400 ... Spare blade holder 407 ... Slit 409 ... Center hole 410 ... Rear side taper hole 420 ... Male threaded part 430 ... Front taper part 440 ... Protruding part 810 ... Chisel blade 811 ... Ear 813 ... Included 814 ... Protruding part 900 ... Impact tool 910 ... Piston 920 ... Cylinder 930 ... Cap 939 ... Through hole 940 ... Spring C ... Central axis

Claims (2)

It ’s a chisel blade,
It has a flat plate-shaped inclusion and
The side surface of the inclusion is formed in an inclined shape.
Engraving sword replacement blade. A blade mounting device for attaching the chisel blade according to claim 1 to an impact tool.
A blade mounting part for mounting the chisel blade and
A tool mounting portion fixed to the spare blade mounting portion for mounting the spare blade mounter on the impact tool, and a tool mounting portion.
With
The spare blade mounting portion is
A tightening ring in which a female screw is formed and a tapered hole complementary to the inclined side surface formed in the front side of the female screw is formed.
A male screw portion formed with a male screw that meshes with the female screw, a tapered portion provided on the front side of the male screw portion and formed in a tapered shape complementary to the tapered hole, and a tapered portion provided on the front side of the tapered portion. A spare blade holder having a protruding portion and a slit formed with a width set to the same width as the included thickness, which reaches the male screw portion from the front end surface.
Have and
The tool mounting portion is formed with a through hole orthogonal to the central axis of the tool mounting portion and a central hole that reaches the through hole from the front end surface of the tool mounting portion along the central axis.
The impact force applied from the impact tool to the replacement blade mounter is configured to be transmitted to the chisel blade through the inner surface of the tapered hole and the inclined surface.
Spare blade mounter.

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