JP2802581B2 - Building crushing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing device used in demolition work of a building or the like, and more particularly to a crushing device attached to a working machine such as a power shovel.

[0002]

2. Description of the Related Art In recent years, demolition works of reinforced concrete buildings have been performed at many sites. In the demolition work, structures such as reinforced concrete (for example, walls,
Slabs, beams, columns, etc.).

Conventionally, this type of construction has been crushed by a method using an air hammer type rock drill or hitting a large steel ball. However, these construction methods have various drawbacks, such as causing a pollution problem with intense noise and vibration, requiring a large work space, and involving danger.

Therefore, recently, a method of crushing a building using a working machine such as a power shovel has been widely adopted. In that method, the building is dismantled by a crusher attached to the working machine as an attachment. In that case,
As the crushing apparatus, a crushing apparatus of a type which crushes a structure by hydraulic pressure or the like and breaks the structure with low noise is generally used.

[0005] This type of crushing device (hereinafter referred to as "construction crushing device") is a pair of side plates constituting a support frame attached to a working machine as described in, for example, Japanese Utility Model Publication No. 3-31789. And a pair of arms rotatably supported by the side plates on the side plates, and a hydraulic cylinder constituting a driving device for rotating these arms with respect to the shaft portions. The pair of arms has a crushing section facing one side of the spindle section and an operation section on the opposite side of the spindle section. The hydraulic cylinder is connected between the operating parts of the pair of arms.

The expansion and contraction force of the hydraulic cylinder acts on the operation unit,
A rotational force about the spindle is applied to each arm by a component force in a direction orthogonal to a line connecting the spindle and the operation unit. The pair of arms is rotated by this rotational force, and the building is crushed by the operation of the crushing unit described below. When the hydraulic cylinder is shortened, the crushing portions of the pair of arms are separated from each other and open. When the hydraulic cylinder extends, the crushing portions of the pair of arms come close to each other and become closed. Therefore, the structure can be crushed by the movement of the crushing unit. Moreover, according to the structure crushing apparatus, when crushing the structure, noise and vibration are reduced, a large work space is not required, and danger can be reduced.

[0007]

In a structure in which a hydraulic cylinder is connected between the operating parts of a pair of arms, as in the above-described construction crushing apparatus, the hydraulic cylinder moves as a whole according to its expansion and contraction. Move closer to or away from the spindle. For this reason, the specific angle formed between the line segment between the spindle portion and the operation portion and the hydraulic cylinder changes significantly. For example, the specific angle is large when the hydraulic cylinder is shortened and the crushing part is open, but the specific angle is sharply reduced as the hydraulic cylinder expands and closes the crushing part. Since the aforementioned component force depends on this specific angle, this component force also decreases as the hydraulic cylinder extends. Since the rotational force of the arm is determined by the component force acting on the operation unit and the distance between the support shaft and the operation unit, the rotational force of the arm decreases as the crushing unit is closed, and in some cases, a sufficient There is a possibility that the crushing force cannot be obtained.

Although a large crushing force can be obtained by designing a large distance between the spindle portion and the operation portion, the design requires a large-sized building crushing device.

It is therefore an object of the present invention to provide a compact structure crushing device capable of obtaining a sufficiently large crushing force.

Another object of the present invention is to provide a building crushing apparatus in which a change in crushing force due to a change in the rotation angle of the arm is reduced.

[0011]

According to the present invention, there is provided a support frame, a support shaft rotatably supported by the support frame, a crushing portion opposing one side of the support shaft, and the support shaft. A pair of arms having an operation unit on the opposite side of the unit and a driving device for driving the operation unit to cause the pair of arms to rotate with respect to the support shaft, wherein the driving device is A pair of extendable and retractable means respectively disposed between the support frame and the operating portions of the pair of arms and having both ends rotatably coupled to the support frame,
The arm has a common support shaft fixed in position, and said pair of telescopic means
Is rotatably coupled to the common support shaft, and the pair
The telescoping means are substantially aligned on the shortest
Thus, the support shaft portion, the operation portion, and the common support shaft
A structure crushing device characterized in that the positional relationship is determined is obtained.

[0012]

Further, according to the present invention, there is provided a structure crushing apparatus characterized in that each of the pair of expansion / contraction means is a hydraulic cylinder.

According to the present invention, each of the expansion and contraction means includes a cylindrical member and a piston rod movable in a cylindrical axis direction of the cylindrical member, and the cylindrical member includes the support frame and the operating portion. And the piston rod is rotatably connected to the other of the support frame and the operation unit, thereby obtaining a building crushing device.

[0015]

1 and 2 show a construction crushing apparatus according to one embodiment of the present invention. The structure crushing apparatus includes a bracket member 11 attached to a working machine (not shown) such as a power shovel, and a pair of side plates 12 spaced apart and parallel to each other in a direction perpendicular to the paper surface. The pair of side plates 12 together form a support frame. Although not shown, the working machine used here includes a boom and a hydraulic cylinder device attached to the boom.

The bracket member 11 has a boom mounting hole 13 used for mounting the working machine to the boom, and a rod mounting hole 14 used for mounting the working machine to the piston rod of the hydraulic cylinder device. I have. Bracket member 11
A support plate 15 is fixed to a lower end of the support plate 15.

On the other hand, a turning plate 16 is fixed to the upper end of the side plate 12. The rotating plate 16 is attached to the supporting plate 15 so as to be rotatable around a vertical axis along the plane of the drawing. Therefore, the side plate 12 is rotatable about the vertical axis with respect to the bracket member 11.

The structure crushing device further comprises a pair of arms 1
8 and a pair of hydraulic cylinders 19. These arms 18 are symmetrical to each other with respect to a plane perpendicular to the plane of the paper containing the vertical axis. Each arm 18 includes a support shaft portion 22 rotatably supported at a lower portion of the side plate 12 by a support shaft 21 perpendicular to the paper surface, and a crushing portion 23 formed of a crushing blade or a crushing blade on one side of the support shaft portion 22. An operation unit 24 on the opposite side of the spindle unit 22;
And a shearing blade 25 located near the support shaft portion 22. Since the structures of these arms 18 are also described in the above-mentioned publication, detailed description will be omitted.

Each of the hydraulic cylinders 19 has a cylindrical member 26.
And a piston rod 27 movable in the direction of the cylinder axis of the cylindrical member 26, and the piston rod 27 protrudes and retracts with respect to the cylindrical member 26 by controlling hydraulic pressure supplied to the inside of the cylindrical member 26, so that the overall It expands and contracts a great length. Therefore, each hydraulic cylinder 19 constitutes a telescopic means.
Each hydraulic cylinder 19 passes a cylindrical member 26 between the pair of side plates 12 and is rotatably coupled to the side plates 12 by a common support shaft 28, and rotates a piston rod 27 to an operation unit 24 of the arm 18 by a pin 29. Movably coupled. Although not shown, the same hydraulic pressure is supplied to the inside of the tubular member 26 of these hydraulic cylinders 19 by common hydraulic pressure supply means.

FIG. 1 shows a first state in which each hydraulic cylinder 19 is shortened most. In the first state, the pair of hydraulic cylinders 19 are substantially aligned. In other words, the fulcrum shaft 21, the common support shaft 28, and the pin 29
Are determined such that when each hydraulic cylinder 19 is shortened most, the paired hydraulic cylinders 19 are substantially aligned. The line connecting the fulcrum shaft 21 and the pin 29 and the hydraulic cylinder 19 are arranged so as to form a specific angle with each other. In the first state, the crushing portion 23 of the pair of arms 18 and the shearing blade 25 both face each other with a space therebetween.

When hydraulic pressure is supplied to each oil cylinder 19,
A force for causing the piston rod 27 to protrude from the cylindrical member 26,
That is, an extension force of the hydraulic cylinder 19 is generated. This extension force acts on the operation unit 24, and gives a rotational force about the fulcrum shaft 21 to each arm 18 by a component force in a direction orthogonal to a line connecting the fulcrum shaft 21 and the pin 29. The pair of arms 18 is rotated by this rotational force, and the building is crushed by the operation of closing the crushing portion 23 and the shearing blade 25 in accordance with the extension of the hydraulic cylinder 19. Therefore, the pair of hydraulic cylinders 19 together constitute a drive device.

When closing the crushing section 23 and the shearing blade 25,
According to the rotation of the pair of arms 18, the pair of hydraulic cylinders 19
Also rotates about the common support shaft 28, the specific angle described above does not show a large change. For this reason, the above-mentioned component force does not show a large change, and therefore, the change in the rotational force of the arm 18 is small. Although the case where the hydraulic cylinder 19 is extended has been described above, the same applies when the hydraulic cylinder 19 is shortened.

FIG. 2 shows a second state in which each hydraulic cylinder 19 is extended most. In the second state, the crushing portion 23 of the pair of arms 18 and the shearing blade 25 are both approaching or in contact with each other. The pin 29 is connected to the fulcrum shaft 21.
, But below the common support shaft 28. By comparing FIG. 2 with FIG. 1, it can be seen that the angle formed by the line connecting the fulcrum shaft 21 and the pin 29 and the hydraulic cylinder 19, that is, the specific angle does not show a significant change.

Therefore, in this structure crushing device, the problem of the conventional structure crushing device is solved because the rotational force of the arm 18 is kept substantially constant regardless of the rotation angle. That is, even if the operation of closing the crushing section 23 is performed, the rotational force of the arm hardly decreases. In addition, it is not necessary to design the distance between the fulcrum shaft 21 and the pin 29 large. Therefore, a sufficiently large crushing force can be obtained in spite of the small size, and a change in the crushing force due to a change in the rotation angle of the arm 18 is small.

It should be noted that the pin 29 may be designed to be located slightly below the common support shaft 28 in advance even when each of the hydraulic cylinders 19 is shortened most. However, the state in which the pin 29 is located below the fulcrum shaft 21 reduces the above-described specific angle, and therefore it is desirable to avoid the state regardless of the state of each hydraulic cylinder 19.

[0026]

As described above, according to the present invention,
It is possible to provide a building crushing device that is small and can obtain a sufficiently large crushing force and that has less fluctuation in the crushing force due to a change in the rotation angle of the arm.

[Brief description of the drawings]

FIG. 1 is a front view showing a structure crushing apparatus according to an embodiment of the present invention with a crushing unit opened.

FIG. 2 is a front view showing the structure crushing apparatus of FIG. 1 with a crushing unit closed.

[Explanation of symbols]

 Reference Signs List 11 bracket member 12 side plate 18 arm 19 hydraulic cylinder 21 fulcrum shaft 22 support shaft portion 23 crushing portion 24 operation portion 25 shear blade 26 cylindrical member 27 piston rod 28 common support shaft 29 pin

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-207571 (JP, A) JP-A-56-150274 (JP, A) JP-A-61-92686 (JP, U) 14909 (JP, B2) Jiko 57-50449 (JP, Y2) Jiko 3-26846 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04G 23/08

Claims (3)

(57) [Claims] A support frame rotatably supported by the support frame; a crushing section facing one side of the support section; and an operation section opposite to the support section. In a building crushing device including a pair of arms, and a driving device that drives the operation unit and causes the pair of arms to rotate with respect to the support shaft, the driving device includes a pair of the support frame and the pair of arms. A pair of extendable and retractable means respectively disposed between the operation unit and the both ends and rotatably coupled to the operation unit, and the support frame has a common support shaft fixed in position.
The pair of expansion and contraction means are rotatably connected to the common support shaft.
And the pair of expansion and contraction means is substantially
The spindle portion, the operation portion,
And a positional relationship between the common support shafts . 2. The structure crushing device according to claim 1, wherein each of said pair of expansion and contraction means is a hydraulic cylinder . 3. The structure crushing device according to claim 1 , wherein each of the expansion and contraction means includes a tubular member and a tubular member of the tubular member.
An axially movable piston rod, the cylindrical member
Rotates to one of the support frame and the operation unit
And the piston rod is connected to the support frame.
Rotatably connected to the other of the
A crushing device for a building.