JPH04363472A - Crushing device for building - Google Patents

Abstract

PURPOSE:To enhance the safety, workability and profitability by clamping an object to be crushed between a stationary crushing arm and a movable crushing arm, and by cutting horizontal reinforcement with horizontal reinforcement cutting blades while cutting vertical reinforcement with vertical reinforcement cutting blades. CONSTITUTION:Horizontal and vertical reinforcement cutting blades 31 through 34 are provided to stationary and movable crushing arms 22. 26 which are pivotally attached together in a scissors-like manner by means of a shaft 25, so that the blades are cooperated together in a scissors-like manner. A reinforced concrete object to be crushed is clamped between the arms 22, 26 and is then sequentially crushed from the top to the bottom thereof so as to expose the reinforcement thereof. Then, the horizontal and vertical reinforcements are cut by the horizontal and vertical cutting blades 33, 34, respectively, in association with the clamping operation of the arms 22, 26. Thereby, it is possible to eliminate work by a worker at a high place and to eliminate the necessity of a scaffold.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a structure crushing device suitable for dismantling structures, particularly tower-like structures such as chimneys made of reinforced concrete. This invention relates to a structure crushing device that can easily cut vertical reinforcing bars.

0002

[Prior Art] Conventionally, this type of crushing device has a fixed crushing arm and a movable crushing arm which are pivotally connected in the shape of scissors and are attached to a frame, and blades for cutting horizontal reinforcing bars are attached to each other between the two crushing arms. One is known that is provided on opposite sides. This crushing device crushes concrete in tower-like structures by suspending the pedestal with a crane, sandwiching the wall at the top of the chimney between a fixed crushing arm and a movable crushing arm, and reciprocating the movable crushing arm. ing. On the other hand, reinforcing bars are cut as follows. In other words, among the reinforcing bars that are exposed after the upper concrete is crushed, the horizontal reinforcing bars are cut with a cutting blade for horizontal reinforcing bars, and the vertical reinforcing bars are bent by the weight of the crushing equipment, and the length of the bent vertical reinforcing bars is increased to a certain extent. If this happens, the gas will cause it to melt.

0003

[Problems to be Solved by the Invention] However, in the method for dismantling reinforcing bars, especially for cutting vertical reinforcing bars, using the conventional crushing equipment described above, when workers go up to a high place such as a chimney to carry out fusing work, it is dangerous and dangerous. The problem is that it is difficult. Furthermore, it requires construction costs as scaffolding is required. Furthermore, in order to improve work efficiency and save construction costs by reducing the number of fusing operations, the length of the cut pieces of vertical reinforcing bars inevitably becomes long, and the cut vertical reinforcing bars are dropped into the chimney being demolished. There is also the problem that the level of danger increases as the smoke must be dropped outside the chimney.

SUMMARY OF THE INVENTION An object of the present invention is to provide a structure crushing device that can easily and safely cut reinforcing bars when demolishing a structure made of reinforced concrete.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the structure crushing apparatus of the present invention has a fixed crushing arm and a movable crushing arm that are pivoted to each other by a scissor-like shaft. In the apparatus, a fixed blade for cutting horizontal reinforcing bars is provided near the axis of the fixed crushing arm and extends along the fixed crushing arm, while a fixed blade for cutting horizontal reinforcing bars is provided in the movable crushing arm to engage with the fixed blade for cutting horizontal reinforcing bars. In addition to providing a movable blade for
A fixed blade for cutting vertical reinforcing bars extending in a direction intersecting the fixed crushing arm is provided near the axis of the fixed crushing arm;
It is characterized in that the movable crushing arm is provided with a movable blade for cutting vertical reinforcing bars that meshes with the fixed blade for cutting vertical reinforcing bars.

[0006]

[Operation] When the object to be crushed made of reinforced concrete is clamped by the fixed crushing arm and the movable crushing arm, and the concrete is crushed sequentially from the top to expose the reinforcing bars, the clamping action of the fixed crushing arm and the movable crushing arm , the reinforcing bar cutting blades for cutting the vertical and horizontal reinforcing bars near the axis of each crushing arm mesh like scissors, and the horizontal reinforcing bars are cut by the cutting blades for cutting the horizontal reinforcing bars,
Further, the vertical reinforcing bars are cut by a vertical reinforcing bar cutting blade. Therefore, there is no need to perform gas cutting as in the past, and the dismantling work can be carried out continuously and efficiently. especially,
Vertical reinforcing bars can be cut short, thus making it possible to drop the reinforcing bars into the chimney.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below with reference to illustrated embodiments. In FIG. 1, 1 is a chimney, 2 is a traveling crane equipped with a boom 3 having a height higher than the chimney 1, 4 is a crushing device suspended from the boom 3 with a wire 70,
7 is a television camera (hereinafter referred to as a television camera) installed in the crushing device 4; 11 is a television receiver (hereinafter referred to as a television receiver) installed in the cab of the crane 2; 12 is a television camera installed in the crushing device 4; This is a television receiver installed in the control room 13 on the ground. As shown in FIG. 2, the crushing device 4 has a rotary table 17 fixed to a rotating shaft 16 hanging from a pedestal 5 whose both ends are suspended by wires 70a and 70b, and a drive motor 18 fixed on the pedestal 5. As a result, the rotary shaft 16 is rotated via the gear transmission mechanism 21, so that the rotary table 17 can be rotated. A rotary joint 60 is provided at the upper end of the rotating shaft 16, and a hydraulic hose 61 and an electric wire 62 from the crane 2 are connected to the rotary joint 60.
are connected to prevent them from twisting. From the rotary joint 60, hydraulic hoses and electric wires are passed through a through hole 63 provided in the rotating shaft 16, and further via a coupling 65 provided at the lower end of the rotating shaft 16, to hydraulic cylinders 23, 27, and a television camera 7, which will be described later. is leading to

A substantially L-shaped fixed crushing arm 22 is suspended from the rotating table 17 by a hydraulic cylinder 23 and a link 24 for tilting the posture. The above hydraulic cylinder 23 and link 2
4 are substantially parallel, and the fixed crushing arm 22, the rotary table 17, and the pedestal 5 can be tilted as shown in FIG. The fixed crushing arm 22
One end of a movable crushing arm 26 is pivotally connected to a shaft 25 provided at the center of the horizontal portion of the crusher. The upper end portion of the fixed crushing arm 22 and the center portion of the movable crushing arm 26 are connected by a hydraulic cylinder 27 for crushing motion, and the extension and contraction of the hydraulic cylinder 27 causes the distal end portion 22a of the fixed crushing arm 22 to connect with the movable crushing arm. The distal end portion 26a of 26 moves toward and away from the crushing portion 28 to crush the portion 28 to be crushed. FIG. 3 of the tip portion 22a of the fixed crushing arm 22
2 of the protrusion 55 and the tip end 26a of the movable crushing arm 26 shown in FIG.
The protrusions 56 shown in FIG. 1 apply concentrated force to the portion to be crushed 28 during crushing, thereby promoting destruction. There may be a plurality of hydraulic cylinders 23 and links 24 for suspending the fixed crushing arm 22, respectively. In short, any structure is sufficient as long as at least one location can be moved up and down.

Further, as shown in FIGS. 2, 3 and 5, the fixed crushing arm 22 has a U-shaped cross section at the distal end thereof, and protrudes toward the movable crushing arm 22, covering the distal end, both sides and the back surface. A fall prevention member 35 is provided. The above fall prevention member 3
5 and the back of the fixed crushing arm 22.
6, 36, 36, .
It is fixed at 7, 37... Therefore, as shown in FIG. 5(B), when the fixed crushing arm 22 is brought into contact with the crushed part 28 of the chimney 1, the coil spring 36 is compressed, the fall prevention member 35 retreats, and the crushed part 28 is compressed. will be pressed. Then, when the portion to be crushed 28 is crushed, the crushed pieces 28a
, 28a, . . . are pressed against the inside of the chimney 1 by the fall prevention member 35 which is urged inward by the coil spring 36, as shown in FIG. 5(C). therefore,
The crushed pieces 28a, 28a... are prevented from falling to the outside of the chimney 1. Note that the falling portion stopping member 35 may be a rigid body or may be made of hard resin.

On the other hand, near the axis 25 of the fixed crushing arm 22, that is, in the deep part, a fixed blade 31 for cutting horizontal reinforcing bars extending vertically along the fixed crushing arm 22 is provided, while the axis of the movable crushing arm 26 is provided. Near the movable crushing arm 25, that is, in the deep part, there is a movable blade 3 for cutting horizontal reinforcing bars that extends vertically along the movable crushing arm 26.
2 are provided. Furthermore, the fixed crushing arm 22 has a fixed blade 33 for cutting vertical reinforcing bars projecting horizontally, while the movable crushing arm 26 has a movable blade 34 for cutting vertical reinforcing bars projecting horizontally. The fixed blade 31 and the fixed blade 33 provided on the fixed crushing arm 22 and the movable blade 32 and the movable blade 34 provided on the movable crushing arm 26 each constitute an inverted T-shaped reinforcing bar cutting blade. The fixed blade 33 and the movable blade 34
is equipped with cutting blades 33a and 34a as shown in FIG.
The cutting blades 3a and 34a are at different levels and are designed to mesh with each other. The fixed blade 33 and the movable blade 34 have a certain curvature so that they mesh smoothly.

Further, a skirt 72 made of a steel plate is provided inside the upper part of the fixed crushing arm 22 and extends to both sides and curves downward. With this skirt 72, the load of the crushing device 4 is applied to the upper end of the vertical reinforcing bars exposed from the concrete of the part to be crushed 28, so that the vertical reinforcing bars are bent inside the chimney 1. The reinforcing bars bent to a predetermined length are cut by fixed blades 33 and movable blades 34 for cutting vertical reinforcing bars, and by fixed blades 31 and movable blades 32 for cutting horizontal reinforcing bars. In this way, by cutting the reinforcing bars after bending them to a predetermined length using the skirt 72, the reinforcing bars can be cut long, reducing the number of cuts, and improving efficiency. The cutting length of the reinforcing bars can be adjusted according to the shape of the object to be crushed.
It can also be cut short, so in this case chimney 1
You can drop rebar into it.

On the other hand, as shown in FIG. 2, the rotary table 17 is provided with a horizontal arm 41 swingable in the horizontal direction, and a vertical arm 42 is provided at the tip of the arm 41 so as to be tiltable in the vertical direction. A television camera 7 is provided at the tip of the arm 42. The horizontal arm 41 can be freely pivoted horizontally by a hydraulic cylinder 43, and the vertical arm 42 can be freely swung vertically by a hydraulic cylinder 44. Therefore, the television camera is positioned on the side surface of the crushed portion 28 of the chimney 1 (
It is now possible to image a radial cross section). Further, the television camera 7 can be rotated in the direction of arrow X by a built-in rotating means, and the lens 49 of the television camera can be moved in the optical axis direction. Further, the television camera 7 is housed in a case having a tempered glass on the side surface on the lens side, and is configured to take pictures through the tempered glass. Furthermore, a lighting device is provided on the case to illuminate the direction of the television camera. Note that the television camera may be an infrared television camera. On the other hand, the driver 51 in the cab of the crane 2 shown in FIG. A sand mat 45 is provided around the chimney 1 to prevent falling objects such as concrete pieces from scattering from the upper part of the chimney 1. Furthermore, the fixed crushing arm 22 of the crushing device 4
A plurality of chains 40 are suspended in a curtain-like manner to prevent the fragments from scattering. Note that instead of this, a net-like object may be hung.

The chimney 1 is dismantled as follows using the crushing device 4 having the above configuration. First, the crushing device 4 is lifted higher than the top of the chimney 1 by the crane 2, and then the crushing device 4 is lifted up higher than the top of the chimney 1.
The operator 52 pulls in and operates the crushing hydraulic cylinder 27 while watching the television receiver 12, and moves the movable crushing arm 2.
6 is opened. Thereafter, the driver in the cab of the crane 2 lowers the crushing device 4 while watching the television receiver 11, and places the crushed part between the fixed crushing arm 22 and the movable crushing arm 26.
Insert 8. And a hydraulic cylinder 43 for horizontal movement.
Then, the hydraulic cylinder 44 for vertical movement is operated to adjust the position and attitude of the television camera 7 so that the television camera 7 can image the side surface of the part to be crushed 28 without being obstructed by the crushing device 4.

Next, while looking at the television receiver 12, the operator 52 of the crushing device 4 moves the hydraulic cylinder 23 so that the tip 22a of the fixed crushing arm 22 contacts the outer circumferential surface 28b of the portion 28 to be crushed in parallel. Operate by slightly expanding and contracting. Further, the rotary table 17 is rotated by the motor 18 so that the protrusion 55 at the tip of the fixed crushing arm 22 and the protrusion 56 at the tip of the movable crushing arm 26 contact the outer circumferential surface 28b of the portion to be crushed 28 at right angles. In this way, the position and attitude of the crushing device 4 are adjusted by the driver 51 and the operator 52 while communicating with each other through the voice communication device 53. After that, as shown in FIG. 4(A),
The hydraulic cylinder 27 for crushing motion is extended, and the portion to be crushed 28 is sandwiched between the fixed crushing arm 22 and the movable crushing arm 26.

Next, when the hydraulic cylinder 23 is extended, one side of the rotary table 17 and the pedestal 5 are lifted up and tilted as shown in FIG. 4(B), and the wire 70a on the lifted one side is loosened. After that, the hydraulic cylinder 2 for crushing motion
7 to extend and retract, the fixed crushing arm 22 and the movable crushing arm 26
When the part to be crushed 28 is crushed by the above, the rotary table 17 and the pedestal 5 tend to become horizontal due to the moment M due to gravity, and the fixed crushing arm 22 is pushed into the chimney 1. Therefore, the crushed pieces 28a such as concrete pieces are pushed inside the chimney 1, preventing the crushed pieces 28a from falling outside the chimney, and safety is ensured. When the crushed portion 28 that should support the fixed crushing arm 22 is removed, as shown in FIG. 4(C),
The fixed crushing arm 22 also enters the inside of the chimney 1, and the rotating table 17 and the pedestal 5 become horizontal.

Furthermore, during the crushing operation as described above, as shown in FIG.
The crushed piece 28a is pressed into the inside of the chimney 1 in a state where the tip 22a of the crushed piece 28a is covered and sealed tightly against the wall surface 28b of the crushed part 28 by the spring force of the coil spring 36. Therefore, the crushed pieces 28a are reliably guided inside the chimney 1, and safety is ensured. Furthermore, if small pieces of concrete are scattered outward, the fixed crushing arm 22
This is prevented by a curtain-like chain 40 suspended from the ceiling. Further, the horizontal reinforcing bars and vertical reinforcing bars in the part to be crushed 28 are bent by the skirt 72 by lowering the crushing device 4, and the fixed blade 31 for cutting the horizontal reinforcing bars at the back, the movable blade 32 for cutting the vertical reinforcing bars, and the It is efficiently cut by the fixed blade 33 and the movable blade 34, and guided into the chimney 1 by the fall prevention member 35. The crushing of the portion to be crushed 28 as described above is carried out by the driver 51.
The operator 52 communicates with each other through the voice communication device 53 and operates the crane 2 and the crushing device 4 to sequentially move the chimney 1 downward in a spiral manner.

In this way, this crushing device brings the fixed crushing arm 22 into contact with the outer periphery of the chimney 1, and presses the movable crushing arm 26 toward the fixed crushing arm 22 with the hydraulic cylinder 27 for crushing movement, thereby crushing the crushed object. The section 28 is clamped, and then the hydraulic cylinder 23 is extended, and the rotary table 17 and the pedestal 5 are
is tilted, and then the part to be crushed 28 is crushed, and
The rotary table 17 and the pedestal 5 are returned horizontally by the action of gravity, the fixed crushing arm 22 is automatically positioned inside the chimney 1, and the fall prevention member 35 guides concrete crushed pieces etc. to the inside of the chimney 1. , the chimney 1 can be safely disassembled, and the trouble of collecting the fragments can be saved. In addition, the crane driver 51 took a picture of the side surface of the part to be crushed 28 that was imaged by the television camera 7.
The operator 52 of the crushing device 4 watches from the ground through the television receivers 11 and 12, communicates with each other through the voice communication device 53, and checks the position and attitude of the crushing device 4 by controlling the drive motor of the crane 2 and the rotary table 17. 18 and the hydraulic cylinder 23 for tilting are operated and controlled, and the hydraulic cylinder 27 for crushing motion is operated to crush the portion to be crushed 28. Therefore, there is no need to provide scaffolding around the chimney 1, and there is no need for workers to climb up the chimney, reducing construction costs, shortening the construction period, and eliminating the dangers of working at heights. Note that by extending the tilting hydraulic cylinder 23 as shown in FIG. 7, the opening of the crushing device 4 can be made horizontal, and even horizontal structures can be crushed.

In the above embodiment, the fixed blade 31 for cutting horizontal reinforcing bars is
, a movable blade 32, a fixed blade 33 for cutting vertical reinforcing bars, a movable blade 34
Since the skirt 72 is provided, even a tower-like structure such as a chimney having reinforcing bars can be bent by the skirt 72 and efficiently cut and dismantled with a small number of cuts. On the other hand, if the number of cuts is increased, the cut short vertical reinforcing bars can be dropped inside the chimney 1. Even if the number of times the vertical reinforcing bars are cut is increased in this way, since the vertical reinforcing bars have a cutting blade, the cutting can be done easily without requiring much time.

In the above embodiment, the rotary joint 60 is provided on the rotating shaft 16 to prevent the hydraulic hose 61 and the electric wire 62 from twisting. You can also pass it through. Further, in the above embodiment, the reinforcing bar cutting blade is provided in an inverted T-shape, but the invention is not limited to this. In short, the blade for cutting the horizontal reinforcing bars may be provided so as to extend in the vertical direction, and the blade for cutting the longitudinal reinforcing bars may be provided so as to extend in the horizontal direction. Although the above embodiment describes the dismantling of a chimney, it goes without saying that the structure to be dismantled is not limited to a chimney.

[0020]

As is clear from the above, the structure crushing device of the present invention has blades for cutting horizontal reinforcing bars as well as blades for cutting vertical reinforcing bars on opposite sides of the fixed crushing arm and movable crushing arm and near the shafts. A cutting blade is provided to cut all the reinforcing bars of the object to be crushed, so unlike the conventional method of cutting vertical reinforcing bars with gas, workers can easily cut the reinforcing bars even in high places like chimneys. There is no need to climb up to perform the work, and there is no need to erect scaffolding for that purpose, improving safety, workability, and economy. In addition, in the past, the cutting length of vertical reinforcing bars had to be made long in consideration of workability and economic efficiency, but according to the present invention, even if the cutting length of vertical reinforcing bars is shortened, workability and economic efficiency are considered.
Vertical reinforcing bars can be cut short because it does not affect economic efficiency too much. In this case, if the structure is cylindrical, such as a chimney, the reinforcing bars can be dropped inside the structure, just like crushed concrete, further improving safety.

[Brief explanation of the drawing]

[Fig. 1] A diagram showing a state in which a crushing device according to an embodiment of the present invention is suspended by a crane.

[Figure 2] Front view of the crushing device in Figure 1

[Fig. 3] Diagrams showing fall prevention members, (A) and (B)
are the front and side views of the fall prevention member, respectively.

[Figure 4]
Diagram explaining the operation of the crushing device

[Figure 5] Diagram explaining the operation of the fall prevention member

[Figure 6] Diagram showing fixed blade and movable blade for cutting vertical reinforcing bars

[Figure 7
】A diagram showing the crushing device of the above embodiment when crushing a horizontal structure

[Explanation of symbols]

5... Frame, 16... Rotating shaft, 17... Rotating table, 22... Fixed crushing arm, 23, 27... Hydraulic cylinder, 26... Movable crushing arm,
31... Fixed blade (for cutting horizontal reinforcing bars), 32... Movable blade (for cutting horizontal reinforcing bars), 33... Fixed blade (for cutting vertical reinforcing bars), 34... Movable blade (for cutting vertical reinforcing bars), 35... Fall prevention member.

Claims (1)

[Claims] 1. A structure crushing device having a fixed crushing arm and a movable crushing arm pivotally connected to each other by a shaft in the shape of scissors, wherein a crushing device extending along the fixed crushing arm near the axis of the fixed crushing arm; A fixed blade for cutting horizontal reinforcing bars is provided, and a movable blade for cutting horizontal reinforcing bars that engages with the fixed blade for cutting horizontal reinforcing bars is provided on the movable crushing arm, and a fixed crushing blade is provided near the axis of the fixed crushing arm. A structure characterized in that a fixed blade for cutting vertical reinforcing bars is provided that extends in a direction intersecting the arm, and a movable blade for cutting vertical reinforcing bars that meshes with the fixed blade for cutting vertical reinforcing bars is provided on the movable crushing arm. Equipment for crushing things.