JPH0438864B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for crushing concrete structures and cutting reinforcing bars and steel frames.

BACKGROUND ART Conventionally, a crushing device is known in which a pair of crushing blades for crushing a concrete portion of a concrete structure and a pair of shearing blades for cutting reinforcing steel etc. are provided on a pair of arms that open and close. In addition, a cutting device has been developed that includes a pair of crushing blades for crushing objects to be cut such as steel frames and pipes, and a pair of shearing blades for cutting the crushed portion of the object, which are attached to a pair of arms that operate to open and close. (For example, patent application No. 58-163082
issue).

Problems to be Solved by the Invention The purpose of the present invention is to crush the concrete part of a concrete structure with one device, crush the object to be cut such as a steel frame inside the concrete structure that is exposed after the crushing, and then create a concrete structure that can be cut. The purpose of the present invention is to provide a crushing/cutting device for structures, etc.

Means for solving the problems Crushing and
The cutting device is a crushing/cutting device for concrete structures, etc., which consists of a pair of arms whose intermediate shafts are pivotally connected to side plates, and an opening/closing drive mechanism that opens and closes the arms, which are pivotally connected to the rear end of the arms. A pair of crushing blades for concrete destruction consisting of a plurality of chevron-shaped teeth are provided at the tip of the arm, and a cutting blade having a trapezoidal cross section is provided adjacent to the crushing blade at the tip side of the arm. A pair of crushing blades for crushing the object are provided, and a pair of shearing blades for shearing the object to be cut are provided adjacent to the crushing blades on the rear end side of the arm.

Function A pair of crushing blades for concrete destruction provided at the tip of the arm crushes the concrete part of the concrete structure by the closing operation of the arm, and the object to be cut, such as the steel frame exposed after crushing, is crushed to the tip side of the arm. A crushing blade provided adjacent to the crushing blade is used to crush the object by the closing action of the arm, and the crushing portion of the object to be cut, such as reinforcing bars or steel frames, is crushed by the crushing blade to the rear end side of the arm. A shearing blade provided adjacent to the blade is capable of cutting by the closing action of the arm, so that crushing and cutting of the concrete structure can be performed by one device.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In FIG. 1, reference numerals 1 and 1 are a pair of arms arranged opposite each other, and support shafts 1a, 1a provided at the intermediate portions of the arms 1, 1 are connected to side plates via shafts 2, 2. The side plates 3, 3 are connected to each other with a constant distance maintained between them,
The end portion thereof is fixed to a rotating plate 4, and the rotating plate 4 is attached to a support plate 5 so as to be rotatable around an axis, and the supporting plate 5 is provided with mounting holes 6 and 7. A bracket member 8 is fixedly provided. The mounting hole 6 of the bracket member 8 is pivotally connected to the tip of an arm 9 of a boom of a movable working machine such as a power shovel (not shown) via a pin 10, for example.
The mounting hole 7 is provided with a pin 12 at the tip of the piston rod 11a of the hydraulic cylinder 11 installed on the arm 9 of the boom.
The working angle of the side plates 3, 3, that is, the arms 1, 1 can be set by changing the protruding length of the piston rod 11a through expansion and contraction.

13 is a hydraulic cylinder serving as an opening/closing drive mechanism for opening and closing the arms 1, 1;
The rear end of one arm 1 is pivotally connected to the hydraulic cylinder 13 via a pin 16, and the rear end of the other arm is connected to the piston rod 13a of the hydraulic cylinder 13. Pin 1 at the tip
The hydraulic cylinder 13 is selectively supplied with pressure oil from a hydraulic supply source on the work machine (not shown) via a hydraulic hose, and is moved forward and backward to open and close the arms 1, 1. . The hydraulic cylinder 13 is provided between the side plates 3, 3 so as to be slidable in the vertical direction.

As shown in FIGS. 1 to 3, a concrete portion A' is attached to the tips of the arms 1, 1 in such a way that the concrete structure A, which is the object to be crushed, is crushed by the closing action of the arms 1, 1. Crushing blades 18, 18 for destruction are fixedly provided so as to face each other. The crushing blades 18, 18 are made of a sticky and abrasion-resistant material, and are composed of a plurality of chevron-shaped teeth 18a, and are used not only to crush the concrete structure A, but also to pinch the reinforcing bars and steel frames exposed after crushing. You can also pull it out. The crushing blades 18, 1 are provided on the distal end sides of the arms 1, 1.
A pair of crushing blades 19, 19 are fixedly installed adjacent to the arms 1, 19, and the crushing blades 19, 19 are made of a strong material and have a trapezoidal cross section. The object to be cut B is squeezed and crushed. Further, on the rear end side of the arms 1, 1, a pair of shearing blades 2 are provided adjacent to the crushing blades 19, 19.
0, 20 are attached, and the shearing blades 20, 20 shear the crushed portion B' of the object B crushed by the crushing blades 19, 19 by the closing action of the arms 1, 1. In this embodiment, the shearing blades 20, 20 are fixed to the arms 1, 1 with bolts 21, but the other crushing blades 18, 18 and crushing blades 19, 19 are also fixed to the arms 1, 1 with bolts. It may also be possible to make the exchange possible. Further, the crushing blades 19, 19 may have blade portions formed in an arc shape to prevent the object to be cut from escaping and securely hold the object.

Using the apparatus of the present invention configured as described above, the reinforced concrete structure A, which is the object to be crushed, is
As shown in Figure 3, which explains the operation of crushing
First, the piston rod 1 is moved by the hydraulic cylinder 13.
3a is retracted to open the arms 1, 1 as shown by the first solid line, operate the boom arm 9 and hydraulic cylinder 11 of the work equipment to crush the reinforced concrete structure A by crushing blade 18 of the arms 1, 1. , 18. Next, the piston rod 13a of the hydraulic cylinder 13 is extended to close the arms 1, 1 as shown by the chain lines in FIG.
The concrete part of reinforced concrete structure A is crushed by crushing blades 18, 18.
Destroy A′. Then, the steel frame, which is the object to be cut B, which is exposed inside the concrete part A' is clamped by the crushing blades 18, 18, is pulled out by operating the boom arm 9 and the hydraulic cylinder 11 of the working machine, and is pulled out again. With the piston rod 13a retracted and the arms 1, 1 open, operate the boom arm 9 of the working machine and the hydraulic cylinder 11 to position the object B, such as a steel frame, to be cut at the center between the crushing blades 19, 19. Then, the piston rod 13a of the hydraulic cylinder 13 is extended to close the arms 1, 1, and the portion of the object B to be cut is crushed between the tips of the crushing blades. Next, the piston rod 13a of the hydraulic cylinder 13 is retracted to open the arms 1, 1, and the arm 9 of the boom of the working machine and the hydraulic cylinder 11 are operated again to remove the crushed portion B' of the object B to be cut. Shear blade 2
Position it at the center of 0.20. Next, the piston rod 13a of the hydraulic cylinder 13 is extended again to close the arms 1, 1, and the crushed portion of the object B to be cut is sheared by the shear blades 20, 20, thereby removing the concrete structure such as reinforcing steel. Crush A.

Note that if the object to be cut B is different from H-type steel, I-type or channel, and is made of ordinary reinforcing bars or lightweight aggregates, it will not be crushed by the crushing blades 19, 19, but will be cut suddenly by the shearing blades 20, 20. The object to be cut B can also be sheared.

In addition, in this example, the shape of the crushing blade was configured with a chevron-shaped tooth-shaped body parallel to the thickness direction of the arm, but unlike the conventional case, a chevron-shaped blade parallel to the thickness direction of the arm is provided at the tip end of the arm. A blade may be provided, followed by a blade perpendicular to this blade. That is, it may be a T-shaped crushing blade.

Effects of the Invention As described above, according to the crushing/cutting device for concrete structures of the present invention, a pair of crushing blades for concrete destruction are provided at the tip of the arm that performs the opening/closing operation, and a pair of crushing blades for destroying concrete are provided adjacent to the crushing blades. By providing a pair of crushing blades for crushing objects to be cut and further providing a pair of shearing blades for shearing objects to be cut adjacent to the crushing blades, it is possible to crush concrete structures and crush steel frames etc. with one device. - Can easily cut or cut reinforcing bars, lightweight aggregates, etc.

In addition, since the crushing is carried out using a crushing blade that has a trapezoidal cross-section, the crushing marks caused by this crushing blade are identified as the sheared areas by the shearing blades, thereby preventing the crushing of the next stage of the crushed steel frame. Shearing work can be easily performed. Furthermore, since this crushing blade is provided on the inside of the arm, not at the tip of the arm, that is, between the crushing blade and the shearing blade, a large force is applied to this crushing blade when the arm opens and closes. It can easily crush steel frames, etc. Moreover, the steel frame, etc. that is being compressed by this crushing blade has a considerable distance from it to the tip of the arm, and there are multiple chevron-shaped teeth of the crushing blade between it and the tip of the arm. According to
It is almost impossible for the steel frame etc. to fall out during crushing.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is an enlarged view of the main parts of the same arm, and FIG. 3 is a
It is a side view showing an operating state same as the above. 1, 1...Arm, 1a, 1a...Spindle part,
2, 2... shaft, 3, 3... side plate, 4... rotating plate,
5... Support plate, 6, 7... Mounting hole, 8... Bracket member, 9... Arm, 10, 12... Pin, 1
1, 13...Hydraulic cylinder, 11a, 13a...
Piston rod, 14, 15... protrusion, 16, 1
7... Pin, 18, 18... Crushing blade, 18a...
Teeth, 19, 19... Crushing blade, 20, 20...
Shearing blade, 21...Bolt, A...Reinforced concrete structure, A'...Concrete part, B...Object to be cut, B'...Crushed part.

Claims (1)

[Claims] 1. A crushing/cutting device for concrete structures, etc., comprising a pair of arms whose intermediate support shafts are pivotally connected to side plates, and an opening/closing drive mechanism that opens and closes the arms, which is pivotally connected to the rear end of the arms. In order from the tip of the arm, a crushing blade for destroying concrete consisting of a plurality of chevron-shaped teeth, a crushing blade for crushing objects to be cut with a trapezoidal cross section, and a shearing blade for shearing objects to be cut are provided. A crushing/cutting device for concrete structures, etc., characterized by: