JPH10277413A - Material body crushing method, crushing attachment and material body crushing mechanism using the attachment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material body crushing method by which large crushing force is obtained with relatively small force by viewing the point that the material body to be crushed such as rock and a concrete block is crushed with force smaller than compressive force to the stretching-shearing direction. SOLUTION: In a method for crushing a material body with a movable clamp piece 2a turned in the opposite directions through a pivotaly supported fulcrum, the material body is compressed with a pair of the clamp pieces and then at least one or both of the clamp pieces or the crushing blade 5 of the clamp piece are displaced relatively with respect to the clamp piece of an opposite side to impart stretching-shearing force to the material body. Consequently, a gripping-mechanism attachment is miniaturized and the capacity is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of crushing an object used for demolition of a concrete building, crushing of a rock, etc. by a crushing device attached to a heavy equipment, a crushing attachment used in the method, and a crushing attachment using the crushing attachment. And a crushing mechanism for the object.

[0002]

A conventional crushing device for dismantling a building or the like by engaging a pair of clamp pieces having meshing teeth only applies a compressive force to an object with the meshing teeth of the pair of clamps. Therefore, a large compressive force is required to destroy an object having a high compressive stress, such as concrete, and it is necessary to increase the size and standardization of the device.

Accordingly, the present invention is focused on the point that an object to be crushed, such as a rock or a concrete block, can be pulled and crushed by a force smaller than a compressive force in a shear direction.
A first object is to provide a method for crushing an object which can obtain a large crushing force with a relatively small force.

A second object of the present invention is to provide a crushing attachment used in the above method.

[0005] A third object of the present invention is to provide a crushing mechanism for performing a crushing operation using the crushing attachment.

[0006]

According to the present invention, as a means for achieving the above object, a first invention crushes an object by a movable clamp piece which rotates in opposite directions via a shaft fulcrum. In the method, while compressing the object with the pair of clamp pieces, at least one or both of the clamp pieces or a crushing tooth of the clamp piece is displaced relative to the counterpart clamp piece to pull and shear the object. This is a method of crushing an object to which a force is applied.

According to a second aspect of the present invention, in a crushing attachment for crushing an object with a movable clamp piece that rotates in opposite directions via a shaft attachment point, crushing teeth are formed on one or both of the pair of clamp pieces. A push / pull member is slidably mounted in a direction orthogonal to the axis of the shaft, so that the push / pull member can reciprocate in push / pull by a slide drive source.

According to a third aspect of the present invention, there is provided a crushing attachment for crushing an object with a movable clamp piece that rotates in opposite directions via a shaft fulcrum.
A push-pull member formed with crushed teeth is slidably mounted in a direction perpendicular to the axis of the shaft, and a driving device for gripping operation using a first hydraulic cylinder is provided between the movable clamp piece and the heavy equipment arm. And a sliding drive device using a second hydraulic cylinder is provided between the main body of the movable clamp and the push-pull member.

A fourth invention is directed to an extension stroke side hydraulic circuit and a telescopic stroke side hydraulic circuit shared by a first hydraulic cylinder for gripping operation of a movable clamp piece and a second hydraulic cylinder of a sliding drive device of a push / pull member. A hydraulic circuit is connected to the first hydraulic cylinder for the gripping operation and to the extension stroke side hydraulic circuit of the second hydraulic cylinder of the sliding drive device. The second hydraulic cylinder is provided with a sequence valve that operates.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A gripping mechanism attachment to be attached to the tip of a heavy equipment arm is formed by integrally mounting a pair of clamp pieces having engaging teeth on opposing surfaces with a shaft. The arm can be fixed to the tip of the arm, and the other rear end can be connected to a piston rod that moves in and out of a hydraulic cylinder mounted on the heavy equipment arm.

The attachment of the gripping mechanism as described above is attached to the tip of the heavy equipment arm based on the structure of the attachment, and when the attachment is operated, the fixed clamp piece attached to the heavy equipment arm maintains immovability, while The clamp piece to be acted on is a movable clamp that is rotatable by a pivoting action with the fixed clamp piece, and has an opening and closing action, and has a gripping action when the object to be clamped is lightly held. Strong compression has a crushing effect.

In this way, the work to be held or the work to be compressed and crushed can be performed on the body to be held in contact with the cylinder depending on the degree of supply of the pressure oil to the cylinder.

[0013] Meshing teeth which can be engaged with each other are provided on opposing surfaces of the clamp pieces so that once the object to be gripped or the crushed object is engaged with the clamp, it cannot deviate from the clamp until the engaging teeth are released. Have been.

The above is the outline of the general-purpose gripping mechanism in the current working heavy machinery.

According to the present invention, one or both of a pair of clamp pieces pivotally mounted as described above are provided with a push / pull member which reciprocates in the diameter direction of the shaft, and the gripping object pressed and held by the clamp is provided on the gripping body. On the other hand, a crushing operation is performed by applying a shearing force.

In these working modes, in the working clamp, one or both of the push-pull members of the pair of shaft-mounted clamp pieces slide as a sliding base in a direction perpendicular to the axis of the shaft. So as to be able to reciprocate.

The operating surface of the push-pull member, that is,
On the working surface and the opposing surface of the other clamp piece, a meshing tooth is used for both crushing of a desired operation, and a wedge-shaped cutting blade is used in place of the meshing tooth when cutting is intended. Are engaged.

The operating source of these push-pull members mainly uses hydraulic pressure. In some cases, the opening and closing operations of the clamps operated by hydraulic pressure are interlocked by interposing mechanical transmission means such as links and camshafts. In some cases.

In the case where hydraulic pressure is used as an operating source of the push / pull member, the tip of a sliding drive device such as a piston rod which goes in and out of a cylinder having one end pivotally connected to a clamp piece is connected to the push / pull member. Then, a pushing / pulling operation is given to the pushing / pulling member in a direction orthogonal to the axis of the shaft of the clamp by the operation of inserting / extracting the pressure oil.

The push / pull member and the opening / closing action of the clamp are temporally related. That is, since the object is grasped by closing the clamp and the shearing operation is started at a fixed stage, from these relations, when hydraulic pressure is used as both actuation sources, one hydraulic circuit is used to open and close the clamp. In some cases, a first hydraulic cylinder for gripping operation and a second hydraulic cylinder for a driving device for sliding the push-pull member are used.

The circuit in this case uses a sequence circuit. That is, for both hydraulic cylinders, a sequence valve is interposed on the high pressure side of the circuit to the hydraulic cylinder for opening and closing the clamp and the branch to the pushing hydraulic cylinder that branches off. The sequence valve is opened to form a sequence circuit, and pressurized oil is sent to the second cylinder to apply a pushing or pulling operation to the sliding device in the pushing / pulling member, and to the actuated body fixed by closing the clamp. A shear force that causes a crushing or cutting phenomenon is applied, and a sequence valve automatically opens and closes a time lag between a clamp closing operation and a pushing / pulling operation.

Therefore, the desired pressurized oil can be pressurized and depressurized by operating the open / close valve (four-way valve) of one circuit without performing an operation having a time lag in both cylinders. .

[0023]

Next, an attachment A of a gripping mechanism attached to the tip of a heavy machine arm 1 in the working machine of the present invention is a single clamp 2, and a pair of clamp pieces are pivotally mounted on a single shaft 3. It is configured as one individual.

The two clamp pieces are movable clamp pieces 2a,
The front ends of the fixed clamp pieces 2b are arranged so as to exhibit an opening / closing action by a rotation about the shaft 3, and a gripping body (not shown) is provided on the surfaces facing each other when closed. A meshing tooth 4 is provided for clamping and fixing.

In the fixed clamp piece 2b, the rear end of the place where the shaft 3 is attached by the shaft 3 can be mounted and fixed to the heavy equipment arm 1, and the other movable clamp piece 2b can be fixed.
a, the end of a motion transmitting member 13 such as a link connected to a piston rod which goes in and out of a first hydraulic cylinder 7 for gripping operation, one end of which is pivotally connected to the heavy machine arm 1 as a part of the movable clamp piece 2a. It can be pivotally attached to the provided bracket 2c.

The movable clamp piece 2a is provided with a push-pull member 6 capable of reciprocating forward and backward in a direction perpendicular to the axis of the shaft 3 supported on the movable clamp piece 2a. It is.

The structure in which the push-pull member 6 is capable of reciprocating with respect to the movable clamp piece 2a will be described in more detail. The movable clamp piece 2a to be engaged is formed into a frame, and the push-pull member 6 is pressed against the frame. The pull member 6 is engaged so as to be slidable.

The push / pull member 6 has a crushing tooth 5 or a cutting blade on a surface opposite to the fixed clamp piece 2b in order to contact the object to be clamped by the other fixed clamp piece 2b. It is provided.

A meshing tooth 4 for establishing the immovability of the object to be clamped is provided on the opposing surface of the crushing tooth 5 or the fixed clamp piece 2b on which the push-pull member 6 facing the cutting blade is not mounted. .

The driving source of the push / pull member 6 mounted on the movable clamp piece 2 is based on the fact that hydraulic pressure is used as the driving source of the working operation in the working heavy machine installed as the gripping mechanism attachment A provided with the clamp 2. It is easiest to use hydraulic pressure as in

Since the driving source of the gripping mechanism, which is the main body operation of the gripping mechanism attachment A serving as the main body, is also generally hydraulic, the basic concept is that the push-pull member 6 is also driven hydraulically.

Push / pull member 6 mounted on movable clamp piece 2a
Since the operation requirement is to make the movable clamp piece 2a differential with the movable clamp piece 2a, the second hydraulic cylinder 8 of the push / pull member sliding drive device 9 that operates with hydraulic pressure between the movable clamp piece 2a and the push / pull member 6 is used. The basic configuration of the hydraulic type is to allow any operation by interposing.

When hydraulic pressure is used for opening and closing the movable clamp piece 2a and the fixed clamp 2b, the operation timing of the push / pull member 6 and the movable clamp piece 2a and the fixed clamp 2b is related. The first hydraulic cylinder 7 and the second hydraulic cylinder 8, which are driving sources of the movable clamp piece 2a, are incorporated into one hydraulic circuit.

That is, as shown in FIG.
To the high pressure side and the low pressure side of the main path on which the first hydraulic cylinder 7 is interposed, and a branch path is provided from the high pressure path between the four-way valve 12 and the first hydraulic cylinder 7. The second hydraulic cylinder 8 is connected to the high pressure side, and a sequence valve 10 is interposed therebetween.

The low-pressure passage starting from the low-pressure side of the second hydraulic cylinder 8 is connected to the first hydraulic cylinders 7 and 4.
Circuit 1 joined to the low pressure path between the two-way valve 12
1.

Further, when the above-mentioned hydraulic drive is not used for the differential action of the push / pull member 6 with respect to the movable clamp piece 2a, the shaft 3, which integrates the movable clamp piece 2a and the fixed clamp piece 2b, Alternatively, the movable clamp piece 2a on the other side
The push / pull member 6 is provided with the push / pull member 6 equipped with a mechanical interlocking means (not shown) such as a link, a rod, and a cam, using a differential between the push / pull member 6 and the fixed clamp piece 2b as a drive source. It may be a driving source for the push-pull operation with the clamp piece 2a.

Although the embodiment in which the push / pull member 6 is provided only on the movable clamp piece 2a side is described in the drawings, the present invention is not limited to this structure, and the push / pull member 6 is provided on the fixed clamp piece 2b side. Alternatively, the push-pull member 6 may be provided on both the movable clamp piece 2a and the fixed clamp piece 2b. Of course, as in the latter case, the crushing mechanism in the case of using the gripping mechanism attachment A in which the pushing and pulling members 6 are provided on both of the clamp pieces, requires the sliding drive so that the pushing and pulling members 6 reciprocate in opposite directions. The device 9 is constituted. In this case, the sliding stroke and the shearing force of the sliding drive device 9 for each push / pull member 6 are reduced by half compared to the case where only one push / pull member 6 is used.

Further, in the embodiment shown in the drawings, a case where one clamp piece is fixed to the heavy equipment arm 1 and only the other clamp piece is rotated with the pivot point as a fulcrum, however, in the present invention, both clamp pieces are turned. It also includes those movably connected.

[0039]

In the gripping mechanism of the working heavy equipment, a strong compressive force is required when trying to crush the clamped object. By moving, the object can be achieved with less force than the compression pressure required for crushing by compression.

As a result, it is possible to reduce the size of the gripping mechanism attachment and to increase the capacity.

Further, by using the cutting blade as the push / pull member, the use of the blade can be expanded for use in cutting steel bars, steel frames, and the like due to the wedge effect of pinching.

When hydraulic pressure is used for the gripping action and the pushing / pulling action, by using a single-circuit circuit for both drive sources, an appropriate time lag occurs between the pinching action and the shearing action, and the desired operation is performed. Is effective.

[Brief description of the drawings]

FIG. 1 is a front view of a gripping mechanism attachment.

FIG. 2 is a side view of a gripping mechanism attachment.

Fig. 3 Hydraulic circuit diagram

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heavy machine arm 2 Clamp 2a Movable clamp piece 2b Fixed clamp piece 2c Bracket 3 Shaft 4 Mesh teeth 5 Crushing teeth 6 Pushing and pulling member 7 First hydraulic cylinder 8 Second hydraulic cylinder 9 Sliding drive device 10 Sequence valve 11 Sequence circuit 12 Four-way valve 13 Motion transmitting member A Grasp mechanism attachment

Claims (4)

[Claims] 1. A method of crushing an object with a movable clamp piece that rotates in opposite directions via a pivot point, wherein the object is compressed by the pair of clamp pieces while at least one or both of the clamp pieces, or both. A method for crushing an object, wherein a crushing tooth of a clamp piece is displaced relatively to a counterpart clamp piece to apply a pulling / shearing force to the object. 2. A crushing attachment for crushing an object with a movable clamp piece rotating in opposite directions via a shaft fulcrum, wherein one or both of the pair of clamp pieces include:
A push / pull member formed with crushed teeth is slidably mounted in a direction orthogonal to the axis of the shaft, and the push / pull member is capable of reciprocating push / pull by a sliding drive source. Attachment for heavy equipment crushing. 3. A crushing attachment for crushing an object with a movable clamp piece rotating in opposite directions via a shaft fulcrum, wherein a push-pull member having crushing teeth formed on one or both of the pair is provided on the shaft. Slidably mounted in a direction orthogonal to the axis of the movable clamp, a driving device for gripping operation using a first hydraulic cylinder is provided between the movable clamp piece and the heavy equipment arm, and the main body of the movable clamp is An object crushing mechanism for heavy equipment, wherein a sliding drive device using a second hydraulic cylinder is provided between the pulling members. 4. A common hydraulic circuit on an extension stroke side and a hydraulic circuit on a telescopic stroke side are connected to a first hydraulic cylinder for gripping operation of a movable clamp piece and a second hydraulic cylinder of a driving device for sliding a push-pull member. After the first hydraulic cylinder extends to a stop position in the extension stroke side hydraulic circuit of the first hydraulic cylinder for the gripping operation and the second hydraulic cylinder of the sliding drive device, the second hydraulic cylinder The mechanism for crushing an object of a heavy machine according to claim 3, further comprising a sequence valve that operates.