JP2003039233A - Apparatus for preventing separation of cutters in wrecking machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for preventing separation of cutters in a wrecking machine so as to maintain cutting performance of the cutters for a long time. SOLUTION: A fixed pawl 7 is fixed to a wrecking machine frame 6 attached to an arm of the wrecking machine. A movable pawl 10 is attached so as to rotate about a shaft 8. Cutters 11, 12 are fixed to the fixed pawl 7 and the movable pawl 10 respectively so as to slide with each other in a contacting state. A contact member 15 is attached to the wrecking machine frame 6 via shims 19. When the gap between the cutters 11, 12 increased, the gap is reduced by changing the thickness and number of the shims 9. Thus, cutting performance of the cutters are maintained.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a dismantling machine,
The present invention relates to a device that prevents the cutters from opening and maintains sharpness.

[0002]

2. Description of the Related Art A dismantling machine is fixed to a dismantling machine frame mounted on an arm of a working machine by fixing a fixed claw, and a movable claw around a shaft is opened and closed by a hydraulic cylinder. The movable claw has a structure in which cutters that slide with each other in the closed state are attached.

[0003]

In the dismantling machine of this type, the sliding portion is worn away as the operating period elapses.
There is backlash, and the distance between the cutters in the closed state is increased, resulting in poor sharpness.

In view of the above problems, it is an object of the present invention to provide a cutter opening preventing device for a dismantling machine which can maintain the sharpness of the cutter for a long period of time.

[0005]

A device for preventing opening of a cutter of a disassembling machine according to claim 1, wherein a fixing claw is fixedly mounted on a dismantling machine frame mounted on a work arm of a working machine, and movable about a shaft. In the dismantling machine in which the cutter is attached to the fixed claw and the movable claw in a closed state, the cutter is slidably brought into contact with the side surface of the movable claw to the dismantling machine frame. Is provided with a contact member that prevents the facing surfaces of the two from opening.

As described above, by providing the contact member that comes into contact with the side surface of the movable claw, it is possible to prevent the interval between the cutters from being opened and maintain the sharpness.

According to a second aspect of the present invention, in the opening preventive device for the cutter of the dismantling machine, the contact member is attached to the movable claw substantially opposite to the cutter centering on the shaft of the dismantling machine frame. Is characterized by.

If the contact member is provided at the position of such a dismantling machine frame, there is a space in the mounting space, so that the contact member can be mounted at a position distant from the shaft. The movable claw cutter can be pressed with sufficient force in the direction of the cutter.

According to a third aspect of the present invention, there is provided a cutter opening prevention device for a dismantling machine, wherein the contact member is attached to the dismantling machine frame through a removable shim.

As described above, by providing the contact member through the shim, the thickness and the number of shims can be changed when the play between the cutters is widened due to the play of the sliding portion. As a result, the cutter interval can be reduced and the sharpness can be maintained.

According to a fourth aspect of the present invention, in the opening prevention device for the cutter of the dismantling machine, the shim is sandwiched between the contact member and a mounting metal member fixed to the frame of the dismantling machine, and the contact member is fixed by a bolt. The feature is that the shim and the mounting bracket are integrated.

With such a shim mounting structure, the sharpness of the cutter can be maintained for a long period of time by increasing the number of shims or increasing the thickness of the shim as the distance between the cutters increases. Become.

[0013]

1 is a side view showing an example of a disassembling machine to which a cutter opening prevention device according to the present invention is applied. In the dismantling machine, a revolving structure 3 is installed on a traveling structure 1 via a revolving device 2, an articulated work arm 4 is attached to the revolving structure 3, and a dismantling machine main body 5 is attached to the tip thereof. The dismantling machine main body 5 is fixedly attached to the dismantling machine frame 6 with the fixed claw 7, and the movable claw 10 is rotated around the shaft 8 on the dismantling machine frame 6 by the hydraulic cylinder 9, whereby the fixed claw 1 is moved.
1 and the movable claw 12 are configured to be opened and closed like scissors.

FIG. 2 (A) is an enlarged side view of the dismantling machine body 5 of FIG. 1, and FIG. 2 (B) is a sectional view taken along line EE. 3 (A) is a vertical cross-sectional view of the dismantling machine body 5, FIG. 3 (B) is its FF cross-sectional view, and FIG. 4 (A) is an enlarged view of a main part of FIG. 3 (A). As shown in FIGS. 2 and 3, a fixed claw 7 and a movable claw 10 are provided.
Cutters 11 and 12 which are crossed like scissors in a closed state are detachably attached by bolts 13 and 14 to the root portion side of the facing portion.

In FIGS. 3A and 4A, reference numeral 15 is a contact member that comes into contact with the side surface 10b of the boss 10a of the movable claw 10. The contact member 15 is attached to the side surface of the dismantling machine frame 6 via a shim 19 by a mounting member 17 fixed by a bolt 16. That is, the contact member 15
A bolt 20 for fixing the contact member 15 is inserted into the bolt insertion hole 17a provided in the mounting bracket 17 and the bolt insertion hole 19a of the shim 19 and screwed into the screw hole 15a of the contact member 15, so that the contact member 15 is fixed together with the shim 19. Fix it. Reference numeral 21 is a grease supply hole for supplying grease for smoothing the contact portion between the contact member 15 and the side surface 10b.
The arrangement is shown in (A).

As shown in FIG. 3 (A), the contact member 1
By contacting the side surface 10b of the boss 10a, the portion 5 presses the portion of the movable claw 10 on the opposite side of the cutter 12 in the direction of arrow a about the shaft 8 of the movable claw 10.
The tip of 0 is urged in the direction of arrow b to prevent the side of the cutter 12 from separating from the cutter 11. When the play increases and the interval between the cutters 11 and 12 increases with the lapse of the operating period, the shim 19 and the contact member 15 together with the mounting bracket 17 are removed and replaced with a new thick shim or by adding a shim. Cutter 1 with a thicker total thickness
The increase in the interval between 1 and 12 is prevented.

As described above, by providing the contact member 15 via the shim 19, it is possible to prevent the gap between the cutters 11 and 12 from increasing, and it is possible to maintain the sharpness.

FIG. 4 (B) is a sectional view showing another embodiment of the present invention, in which a shim 22 is provided between the collar 17b of the fitting 17 and the dismantling machine frame 6, and the shim 22 is provided.
By changing the number or thickness of the cutters, the protrusion of the contact member 15 with respect to the boss 10a is changed to change the cutter 1
This is to prevent the gap of 1 and 12 from opening.

In carrying out the present invention, the contact member 15
Can be provided on the cutter 12 side of the movable pawl 10 with the shaft 8 in the dismantling machine frame 6 as the center, but as shown in the present embodiment, the contact member 15
If the structure is provided on the substantially opposite side of the cutter 12, there is a sufficient mounting space, so that the distance between the center of the shaft 8 and the contact portion between the contact member 15 and the boss 10a can be sufficiently secured, and the lever According to the principle, there is an advantage that a moment for pressing the cutter 12 toward the cutter 11 side can be easily secured.

In the present invention, instead of providing the shim 19, the contact member 15 itself may be changed to reduce the opening between the cutters. However, it is more economical to replace or add shims, because only small parts need to be changed.

[0021]

According to the first aspect of the present invention, since the contact member that comes into contact with the side surface of the movable claw is provided, it is possible to prevent the interval between the cutters from being opened and maintain the sharpness.

According to the second aspect of the present invention, since the contact member is provided on the side of the movable pawl substantially opposite to the cutter with the shaft in the dismantling machine frame as a center, a space for mounting the contact member can be easily provided. The contact member can be secured, and the contact member can be attached at a position distant from the shaft, and the movable claw cutter can be pressed with sufficient force in the direction of the fixed claw cutter by the principle of leverage.

According to the third and fourth aspects, the contact member is provided through the shims, and when the intervals between the cutters are widened, the intervals between the cutters can be reduced by changing the thickness and the number of the shims. Therefore, it is possible to economically maintain sharpness by changing a small member.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a disassembly machine to which a cutter opening prevention device according to the present invention is applied.

2A is an enlarged side view of the dismantling machine body of FIG. 1,
(B) is the EE sectional view.

3A is a vertical cross-sectional view of the dismantling machine main body of the present embodiment, and FIG. 3B is a FF cross-sectional view thereof.

FIG. 4A is an enlarged view of a main part of FIG. 3A, and FIG. 4B is a sectional view showing another embodiment of the present invention.

[Explanation of symbols]

1: traveling body, 2: revolving device, 3: revolving body, 4: working arm, 5: dismantling machine body, 6: dismantling machine frame, 7: fixed claw, 8: axis, 9: hydraulic cylinder, 10: movable claw , 11,
12: Cutter, 13, 14: Bolt, 15: Contact member, 16: Bolt, 17: Mounting bracket, 19, 22: Shim, 20: Bolt, 21: Grease supply hole

Claims (4)

[Claims] 1. A fixed claw is fixedly attached to a dismantling machine frame attached to a work arm of a working machine, and a movable claw is openably and closably mounted around a shaft, and the fixed claw and the movable claw are slid on each other in a closed state. A dismantling machine having a moving cutter attached, wherein the dismantling machine frame is provided with a contact member that slidably contacts the side surface of the movable claw to prevent the facing surfaces between the cutters from opening. A device to prevent the cutter of the dismantling machine from opening. 2. The cutter opening prevention device for a disassembling machine according to claim 1, wherein the contact member is attached to a side of the dismantling machine frame substantially opposite to the cutter of the movable claw about the shaft of the disassembling machine frame. A device that prevents the cutter of the dismantling machine from opening. 3. The cutter opening prevention device for a dismantling machine according to claim 1, wherein the contact member is attached to the dismantling machine frame through a removable shim. Cutter opening prevention device. 4. The cutter opening prevention device according to claim 3, wherein the shim is sandwiched between the contact member and a mounting bracket fixed to the dismantling machine frame, and the contact member is fixed by a bolt.
A cutter opening prevention device for the dismantling machine characterized by integrating the shim and the mounting bracket.