JPH0544445Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for crushing structures such as reinforced concrete.

Reinforced concrete structures are crushed by using a crusher to destroy the concrete portions and cut the reinforcing steel portions. This type of crusher is equipped with a pair of arms that have opposing crushing blades, and a piston-cylinder mechanism that drives the arms to open and close. however,
A conventional piston-cylinder mechanism is arranged along the opening/closing direction of the arm, and opens/closes the arm by retracting and extending in the opening/closing direction of the arm.

By the way, in order to utilize the driving force of the piston-cylinder mechanism in a boosting manner, the driving stroke (distance) of the piston-cylinder mechanism must be made long, and therefore, the width dimension of the arm in the opening and closing direction must be increased. was getting bigger. On the other hand, in reinforced concrete structures, the reinforcing bars are cut after the concrete portion is destroyed to expose the reinforcing bars, and the cutting operation is performed by inserting an arm between the reinforcing bars. Therefore, when the width of the arm in the opening/closing direction increases as in the past, there is a problem in that it is difficult to work in narrow spaces.

In order to solve these problems, it is conceivable to open and close the arm using a piston-cylinder mechanism that retracts and extends along the longitudinal axis of the side plate.
However, with a piston-cylinder mechanism arranged in the vertical axis direction, if the object to be crushed is not caught in the center between the arms, an unbalanced load will act on each arm, twisting the piston-cylinder mechanism and causing the piston and There is a risk of damaging the cylinder, etc. For example, if the unbalanced load of the arm is concentrated on the piston as described in Japanese Patent Publication No. 58-785, the piston, which has weak rigidity against external forces (twisting force) from the side, will be damaged.

This idea was created in view of the above-mentioned circumstances.
In a crushing device that opens and closes an arm using a piston-cylinder mechanism that retracts and extends along the vertical axis direction of the side plate, the bottom of the cylinder can sufficiently exert the twisting force acting on the piston-cylinder mechanism. Damage to the piston, etc. can be reliably prevented by supporting it on the side plate through the section.

Hereinafter, the present invention will be explained based on an embodiment shown in the drawings. In the drawing, 1 is a side plate frame, and this side plate frame 1 is composed of side plates 1a, 1 which are spaced apart and facing each other.
a, and a connecting plate 1b that connects the base ends of these side plates 1a, 1a. 2,2' is
The side plates 1a, 1 have opposing crushing blades 3, 3'.
Each arm 2, 2' is located between the side plates 1a, 1a, and its base end portions 2a, 2a' are connected to the side plates 1a, 1a via pivots 4, 4'.
1a, so that they can be opened and closed symmetrically. Further, the crushing blades 3, 3' are arranged so as to face a required number of crushing protrusions 3a, 3a' arranged oppositely at different positions on the distal ends of both arms 2, 2', and on the proximal ends of both arms 2, 2'. It is composed of a pair of shearing blades 3b and 3b' arranged. Crushing protrusion 3a,
As shown in FIG. 5, the shearing blade 3b is integrally provided on the bases 6 and 6' which are removably attached and fixed to the respective arms 2 and 2' with bolts 5 and 5'. , 3b' are removably fixed to each arm 2, 2' by bolts 7, 7', as shown in FIG. In addition, both arms 2, 2'
Hooking pieces 2b and 2b' are provided at the tips of the crushing pieces 2b and 2b' to project inward, and these hooking pieces 2b and 2b' are used to hook onto objects to be crushed and lift or move them. 8
is arranged along the longitudinal axis between the side plates 1a, 1a, and the arms 2, 2'
It is a piston-cylinder mechanism that opens and closes symmetrically. That is, the piston 8a of the piston-cylinder mechanism 8 is connected via the connecting shaft 10 between the upright plates 9 on the base end connecting plates 1b of the side plates 1a and 1a, and the cylinder 8b is connected to the bases of the arms 2 and 2'. End protrusion 2
c, 2c' via links 11, 11'.

That is, each link 11, 11' has one end connected to pin 1.
It is pivotally connected to a pair of brackets 8c and 8c' that protrude from the bottom part 8b' of the cylinder 8b to both sides along the side plates 1a and 1a at points 2 and 12', and the other end is connected to an arm using pins 13 and 13'. 2, 2' proximal protrusion 2
It is pivoted to c and 2c'. In addition, side plates 1a, 1
A circular plate 14 is fixed to one end of a, and this circular plate 14 has a nut 16 screwed onto a center bolt 15 fixed to the circular plate 14, for example.
7, it is attached to the circular plate 17 so as to be rotatable in the circumferential direction, and one end hole 17b of the bracket 17a of this circular plate 17 is connected to the pin 1.
For example, it is pivotally connected to a boom 19 of a movable crushing machine via a bolt 8. Further, the other end hole 17c of the bracket 17a of the circular plate 17 is pivotally connected to a piston 21a of a hydraulic cylinder 21 for adjusting the working angle via a pin 20, and the circular plate relative to the boom 19 is controlled by the telescopic position of the piston 21a. Seventeen working angles are set. In addition, 22 in the figure is a circular plate 14
These bolts can also be fixed to the circular plate 17, and 23a and 23b are hydraulic supply/discharge ports connected to hydraulic hoses (not shown) to supply and discharge hydraulic pressure to and from the cylinder 8b. 24a,2
Reference numeral 4a denotes a guide groove formed by guide bodies 24, 24 in the vertical axis direction of the opposing inner surfaces of each side plate 1a, 1a, respectively. Side plates 1a, 1a
A pair of engaging bodies 25, 25 protruding at right angles toward
is engaged.

The operation of the device configured as described above will be explained. To explain the operation of crushing a target object A such as a reinforced concrete structure, as shown in FIG. Arm 2, via end protrusions 2c, 2c'
2' is opened, and the opened arms 2, 2' are moved and operated by the boom 19 of the crushing work machine and the hydraulic cylinder 21 for adjusting the working angle, so that the object A to be crushed is crushed by the crushing protrusion 3a of the arms 2, 2'. , 3a'. Next, the piston-cylinder mechanism 8 is extended to lower the cylinder 8b as shown in FIG. 1, and the links 11, 11' and arms 2,
The arm 2,
2' is closed, and the reinforced concrete structure A is crushed by the crushing protrusions 3a, 3a' to crush the concrete portion A'. In addition, arm 2,
Concrete part by one crushing action of 2'
If A' is not sufficiently destroyed, repeat the crushing operation several times.

When the concrete part A' is destroyed in this way, the internal reinforcement A'' is exposed.
The shear blades 3b, 3b' are opened by the retraction operation of the cylinder mechanism 8, and are sandwiched between the shear blades 3b, 3b', and the piston-cylinder mechanism 8 is extended.
3b' is cut and the reinforced concrete structure A is crushed.

Therefore, since the device of the present invention opens and closes the arms 2, 2' by means of the piston-cylinder mechanism 8 that retracts and extends along the longitudinal axis direction of the side plates 1a, 1a, the arms 2, 2' There is no need for a width dimension that accommodates the entire length of the piston-cylinder mechanism in the opening/closing direction of the arms 2, 2', and therefore the width dimension of the arms 2, 2' in the opening/closing direction can be made as small as possible.
As described above, by reducing the width of the arms 2, 2' in the opening and closing direction, crushing work in narrow spaces becomes easier.

In addition, in the present invention, the crushing blades 3, 3' are arranged opposite to each other at different positions on the distal end sides of both arms 2, 2', and a required number of crushing protrusions 3a, 3a' and both arms 2, 2' A pair of shearing blades 3 facing each other on the proximal end side
b and 3b', the concrete part can be efficiently destroyed in the first stage of crushing work of reinforced concrete structures, etc. by pushing and crushing with the bending action of the crushing protrusions 3a and 3a' located at different positions. At the same time, the reinforcing bars etc. exposed by the destruction of this concrete part are cut using shear blades 3b and 3b provided on the same arms 2 and 2'.
3b' allows the crushing to be carried out continuously and efficiently, improving the workability of the crushing work.

Further, in the present invention, the piston 8a of the piston-cylinder mechanism 8 is connected to the proximal connecting plate 1b of the side plates 1a, 1a, and the bottom part 8 of the cylinder 8b is
A pair of brackets 8c, 8c' projecting from b' to both sides along side plates 1a, 1a are connected to links 11, 11.
Guide grooves 24a, 24a are connected to the proximal protrusions 2c, 2c' of the arms 2, 2' through the guide grooves 24a, 24a formed in the longitudinal axis direction of the opposing inner surfaces of the side plates 1a, 1a, respectively.
Each side plate 1 from the bottom part 8b' of the cylinder 8b
A pair of engaging bodies 2 protruding at right angles toward a and 1a
5 and 25 are engaged, the guide grooves 24a and 2
4a guides the cylinder 8b in the longitudinal axis direction of the side plates 1a, 1a, and the arms 2, 2', links 11,
11' The twisting force acting on the piston-cylinder mechanism 8 on the brackets 8c, 8c' and the bottom part 8b' of the cylinder 8b is supported by the side plates 1a, 1a via the bottom part 8b' of the cylinder 8b and the engaging bodies 25, 25. Therefore, even if an unbalanced load acts on the arms 2, 2', the piston 8a and the connecting shaft 10 will not be damaged. Moreover, since the bottom part 8b' of the cylinder 8b has a large diameter and is a part that can sufficiently exhibit rigidity, the engaging bodies 25, 25 protruding from the bottom part 8b' are Side plates 1a, perpendicular to brackets 8c, 8c'
By supporting at right angles to 1a, the rigidity against twisting force can be effectively increased.
Damage to the piston 8a etc. can be reliably prevented.

Further, brackets 8c and 8c' that connect the bottom part 8b' of the cylinder 8b to the proximal protrusions 2c and 2c' of the arms 2 and 2' protrude to both sides to connect the proximal protrusions 2 and 2c.
c, 2c', and arms 2, 2'
are connected to the brackets 8c, 8c' at two points, so that the brackets 8c, 8 of the cylinder 8b are connected to the brackets 8c, 8c' at two points.
The connection structure between c' and the proximal protrusions 2c, 2c' of the arms 2, 2' can be made firm, and damage to the pivot pins etc. can be prevented. Furthermore, the piston 8a is connected to the side plates 1a, 1
The arms 2 and 2' are connected to the proximal connecting plate 1b of the cylinder 8b by moving the cylinder 8b itself.
The cylinder 8b is disposed closer to the concrete crushing part, and the piston rod is placed far from the crushing part.
The cylinder 8b prevents concrete lumps, sand, and stones from entering into the piston rod part, and the concrete lumps, sand, and stones caught between the side plates are removed by the movement of the cylinder, so that the piston rod is free from concrete lumps and stones. Less likely to be damaged by sand or stones. Thereby, oil leakage can be prevented and the life of the piston-cylinder mechanism 8 can be extended.

In addition to installing the device of the present invention on a movable crushing machine, it may also be installed in a fixed manner and objects to be crushed may be carried into the machine. In this case, the working angle of the arms 2 and 2' may be It can also be set constant.
Further, in the illustrated example, the rows of crushing projections 3a and the rows of crushing projections 3a' are arranged alternately, but in the present invention, the crushing projections 3a and 3a' are not arranged in a row, and the crushing projections 3a The crushing protrusion 3a' may be arranged so as to be always adjacent to the crushing protrusion 3a'. Furthermore, the structure for attaching the side plate frame 1 to the boom 19 is not limited to the above embodiment, and for example, the circular plate 14,
The present invention can be carried out by directly connecting the side plates 1a, 1a to the boom 19, or by connecting the connecting plate 1b to the boom 19, without using the connecting plate 17. In addition to the above-mentioned reinforced concrete structures, the device of the present invention can be used as a crushing device for various structures reinforced with core materials such as reinforcing bars and steel frames, and various structural materials.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a front view, Fig. 2 is a left side view, Fig. 3 is a right side view,
FIG. 4 is a front view showing the operating state, and FIG. 5 is a sectional view taken along the - line in FIG. 1. 1a, 1a...Side plate, 2, 2'...Arm, 2
c, 2c'... Proximal protrusion of arm, 3, 3'... Crushing blade, 3a, 3a'... Crushing protrusion, 3b, 3b'...
...Shearing blade, 8...Piston-cylinder mechanism, 8
b'...bottom part of cylinder, 24a...guide groove, 25...engaging body.

Claims (1)

[Claims for Utility Model Registration] (1) The intermediate portions of a pair of arms having opposing crushing blades at their distal ends are pivotally connected between side plates whose base ends are fixed to a base end connecting plate and are arranged opposite each other. At the same time, in the crushing device in which the tip end of the arm is opened and closed by a piston-cylinder mechanism disposed along the longitudinal axis between the side plates, the piston of the piston-cylinder mechanism is A pair of brackets connected to the proximal end connecting plates of the side plates and protruding from the bottom of the cylinder to both sides along the side plates are respectively connected to the proximal end protrusions of the arms via links, and the opposite inner surfaces of the respective side plates A crushing device in which a pair of engaging bodies protruding from the bottom of the cylinder at right angles toward each side plate are engaged with guide grooves formed in the vertical axis direction of the cylinder. (2) A utility model registration request consisting of a required number of crushing protrusions with crushing blades arranged oppositely at different positions on the distal ends of both arms, and a pair of shearing blades arranged oppositely on the proximal ends of both arms. A crushing device according to scope 1.