Crushing equipment for concrete column

Abstract

To provide crushing equipment that can be decomposed into relatively lightweight components, is therefore easy to handle, and is applicable to various concrete columns having different diameters.SOLUTION: Crushing equipment 1 includes: four hydraulic crushers 2; and four connection metal fitting assemblies 3 that connect adjacent hydraulic crushers 2. The hydraulic crusher 2 comprises: a hydraulic cylinder 4; a through-hole 6 fixed to a distal end of a piston rod 5; and a frame assembly 7 supported by a rod cover part 41. A frame body 8 of the frame assembly 7 includes a pair of pin reception holes 81a, 82a at laterally symmetrical positions on a distal end side. A pair of ball lock pins 9 penetrate through the pin reception holes in a freely removable manner. The connection metal fitting assembly 3 includes, on both end sides, a pair of pin insertion holes 31a, 32a to which the ball lock pins 9 can be inserted. The connection metal fitting assembly 3 is connected to one hydraulic crusher 2 by one ball lock pin 9 on one end side, and to the other adjacent hydraulic crusher 2 by the other ball lock pin 9 on the other end side.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an apparatus for crushing hollow cylindrical reinforced concrete pillars, such as concrete pillars installed to hold down railway overhead wires or cast concrete piles. [Background technology]

[0002] A pole crusher described in Patent Document 1 is known as a device for crushing hollow cylindrical reinforced concrete poles. This device consists of a hydraulic cylinder fixed to a fixed ring that surrounds the concrete pole, and a chisel fixed to its piston rod. The fixed ring has a pair of semicircular rings pivotally attached at one end so that they can be opened and closed, and connected at the other end so that they can be connected and separated. Patent Document 2 also describes a concrete pile crushing device. This device has a structure in which four hydraulic cylinders are fixed facing each other to a support frame that surrounds the concrete pile, and a roughly rectangular, horizontal plate-shaped crushing blade is attached to the tip of the ram of each cylinder. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 06-031841 [Patent Document 2] Japanese Utility Model Application Publication No. 54-090925 Summary of the Invention [Problem to be solved by the invention]

[0004] All of the above conventional crushing devices have hydraulic cylinders fixed to an annular support frame or fixed ring, which makes them heavy and requires two or more workers to set up and use the tool. Also, because the inner diameter of the support frame or fixed ring is fixed, they cannot be used for various types of concrete pillars with different diameters. Therefore, an object of the present invention is to provide a concrete pillar crushing device that can be disassembled into relatively light components, is easy to handle, and can be applied to various types of concrete pillars with different diameters. [Means for solving the problem]

[0005] In the following description, reference will be made to the reference numerals in the accompanying drawings, but the present invention is not limited thereto. To solve the above-mentioned problems, the concrete pillar crushing device 1 of the present invention includes multiple hydraulic crushers 2 of identical configuration arranged around the periphery of an upright concrete pillar P to be crushed, and multiple connecting metal fitting assemblies 3 connecting adjacent hydraulic crushers 2 to surround the concrete pillar P. The device simultaneously crushes the concrete pillar P from the periphery using the multiple hydraulic crushers 2. The hydraulic crusher 2 includes a hydraulic cylinder 4 arranged with its axis oriented horizontally to the center of the concrete pillar P, a crushing blade 6 fixed to the tip of a piston rod 5 inside the hydraulic cylinder 4, and a frame assembly 7 supported by the rod cover 41 of the hydraulic cylinder 4. The frame assembly 7 includes a frame main body 8 and a pair of ball lock pins 9. The frame main body 8 is fixed to the rod cover 41 at its base end and expands horizontally symmetrically toward the tip end with respect to the axis of the hydraulic cylinder 4. Similarly, the frame main body 8 includes a pair of pin receiving holes 81a, 82a spaced apart from each other at symmetrical positions. The pair of ball lock pins 9 pass vertically through the pin receiving holes 81a, 82a so as to be freely inserted and removed. The connecting fitting assembly 3 has a pair of pin insertion holes 31a, 32a at both ends, through which the ball lock pins 9 can be inserted, and is connected to one hydraulic crusher 2 at one end by one ball lock pin 9, and to another adjacent hydraulic crusher 2 at the other end by the other ball lock pin 9. [Effects of the Invention]

[0006] The crushing device of the present invention can basically be divided into multiple components, transported, and assembled around the concrete pillar to be crushed, so it is lightweight and easy to handle. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view of a concrete pillar crushing device according to the present invention in use; FIG. [Figure 2] FIG. 2 is a plan view of the crushing device of FIG. 1 in use. [Figure 3] FIG. 2 is a side view of the crushing device of FIG. 1 in use. [Figure 4] FIG. 2 is a perspective view of a hydraulic crusher and a connecting fitting assembly that constitute the crushing device of FIG. 1. [Figure 5] FIG. 5 is a plan view of the hydraulic crusher and the connector assembly of FIG. 4. [Figure 6] 6 is a cross-sectional view taken along the line VI-VI in FIG. 5. [Figure 7] FIG. 5 is a partially cutaway plan view of the hydraulic crusher of FIG. 4 in use. [Figure 8] FIG. 2 is an exploded perspective view of the hydraulic crusher and the connecting fitting. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the present invention will be described with reference to the drawings. As shown in Figures 1 to 3, the concrete pillar P crushing device 1 is equipped with four identical hydraulic crushers 2 arranged on all four sides, at 90° intervals around the outer periphery of the upright concrete pillar P to be crushed, and four connecting metal fitting assemblies 3 that connect adjacent hydraulic crushers 2 to surround the concrete pillar P, and is a device that crushes the concrete pillar P from all four sides simultaneously using the four hydraulic crushers 2.

[0009] As clearly shown in Figures 4 to 8, the hydraulic crusher 2 comprises a hydraulic cylinder 4 arranged with its axis oriented horizontally at the center of the concrete column P, a crushing blade 6 fixed to the tip of a piston rod 5 inside the hydraulic cylinder 4, and a frame assembly 7 supported by a rod cover part 41 of the hydraulic cylinder 4. The four hydraulic crushers 2 that make up the crushing device 1 are connected to the same hydraulic pump and are set up to operate simultaneously.

[0010] As shown clearly in Figure 8, the cutting edge of the crushing blade 6 is flat with a horizontal width greater than its vertical thickness, and is formed in an inverted arc shape so as to contact the outer periphery of the concrete column P at a point. Because the cutting edge is wide and flat, it can destroy a relatively large area of ​​concrete, but because it is arc-shaped, the bending moment acting on the piston due to the reaction force of the driving of the blade 6 is reduced.

[0011] The frame assembly 7 comprises a frame body 8 fixed to the rod cover portion 41, and a pair of ball lock pins 9 for attaching and detaching the connecting metal fitting assembly 3 to and from the frame body 8.

[0012] The frame body 8 comprises a pair of identical upper and lower support plates 81, 82 that are connected in parallel and spaced apart vertically so that the piston rod 5 can move back and forth between them, and is fixed at the base end by a pair of fixing pins 83 that penetrate vertically through the rod cover part 41.

[0013] Both support plates 81, 82 expand horizontally symmetrically from the base end toward the tip end with respect to the axis of the hydraulic cylinder 4, and are provided with a pair of pin receiving holes 81a, 82a spaced apart at symmetrical positions on the tip end. The edges of both support plates 81, 82 on the tip end side are curved inward in an arc shape so as to generally follow the outer periphery of the concrete column P. Both support plates 81, 82 are connected at both left and right edges by connecting plates 84.

[0014] A pair of ball lock pins 9 are inserted and removed vertically through the pin receiving holes 81a and 82a.

[0015] The connecting fitting assembly 3 is composed of identical upper and lower connecting plates 31, 32 connected in parallel to each other by a plurality of vertical connecting pins 33, and can be connected at both ends between the upper and lower connecting plates 81, 82 of the frame body 8 by ball lock pins 9. The upper and lower support plates 31, 32 are elongated metal plates curved in an arc to fit the outer periphery of the concrete pole P to be crushed, and have a pair of pin insertion holes 31a, 32a at both ends corresponding to the pin receiving holes 81a, 82a so that the ball lock pins 9 can be inserted therethrough. As shown in FIGS. 1 to 3, the connecting fitting assembly 3 is connected to one hydraulic crusher 2 at one end by one ball lock pin 9, and to another adjacent hydraulic crusher 2 at the other end by the other ball lock pin 9.

[0016] The distance between the pair of pin insertion holes 31a, 32a of the connecting metal fitting assembly 3 is set to match the distance between the pair of pin receiving holes 81a, 82a of the frame assembly 7. As a result, when not connecting to an adjacent hydraulic crusher 2, both ends of the connecting metal fitting assembly 3 can be folded and fixed to one hydraulic crusher 2 with the ball lock pins 9, as shown in Figure 5. In this state, the cutting edge of the crushing blade 6 is positioned retracted toward the hydraulic cylinder 4 from the connecting metal fitting assembly 3, so when moving together with the hydraulic crusher 2, the cutting edge is prevented from coming into contact with surrounding components and being damaged, and the cutting edge itself is also prevented from being damaged.

[0017] The crushing device 1 can be moved in a relatively lightweight state by folding and holding the connecting fitting assembly 3 on an individual hydraulic crusher 2, or assembled around a concrete pillar P, and is individually relatively small, lightweight, and easy to handle. When assembling the crushing device 1 around a concrete pillar P, the ball lock pin 9 on one of the individual crushers 2 is removed, the holding connecting fitting assembly 3 is unfolded, and the crusher 2 is connected to another adjacent crusher 2.

[0018] In the illustrated embodiment, the connecting fitting assembly 3 has another pair of pin insertion holes 31b, 32b formed at a distance from the pin insertion holes 31a, 32a in the circumferential direction of the concrete column P. By inserting the ball lock pin 9 into one of the pin insertion holes 31a, 32a, 31b, 32b selected depending on the diameter of the concrete column P to be crushed, the connecting fitting assembly 3 can be applied to concrete columns P of different diameters.

[0019] The above describes an example of using four hydraulic crushers 2 and four connecting fitting assemblies 3 connecting them together, but the crushing device 1 of the present invention is not limited to this, and as long as there are multiple hydraulic crushers 2 and multiple connecting fitting assemblies 3, the number is not limited to four. [Explanation of symbols]

[0020] 1 Crushing equipment 2. Hydraulic crusher 3. Connecting metal fitting assembly 31 Upper connection plate 31a Pin insertion hole 31b Pin insertion hole 32 Lower connecting plate 32a Pin insertion hole 32b Pin insertion hole 33 Connecting pin 4 hydraulic cylinders 41 Rod cover 5 Piston rod 6 Crushing blade 7 Frame assembly 8 Frame body 81 Upper support plate 81a Pin receiving hole 82 Lower support plate 82a Pin receiving hole 83 Fixing pin 84 Connecting plate 9 Ball Lock Pin P Concrete pillar

Claims

1. A concrete pillar crushing device comprising: a plurality of hydraulic crushers of the same configuration that are arranged around the outer periphery of an upright concrete pillar to be crushed; and a plurality of connecting metal fitting assemblies that connect adjacent hydraulic crushers together and surround the concrete pillar; and the concrete pillar is crushed simultaneously from the outer periphery by the plurality of hydraulic crushers, The hydraulic crusher comprises a hydraulic cylinder arranged with its axis oriented horizontally at the center of the concrete pillar, a crushing blade fixed to the tip of a piston rod in the hydraulic cylinder, and a frame assembly supported by a rod cover portion of the hydraulic cylinder, the frame assembly includes a frame body fixed to the rod cover portion at the base end side, expanding horizontally symmetrically with respect to the axis of the hydraulic cylinder toward the tip end side, and including a pair of pin receiving holes spaced apart at symmetrical positions, and a pair of ball lock pins passing vertically through the pin receiving holes so as to be freely insertable and removable; The connecting fitting assembly has a pair of pin insertion holes on both ends, through which the ball lock pins can be inserted, corresponding to the pair of pin receiving holes, and is connected to one of the hydraulic crushers at one end by one of the ball lock pins, and to another adjacent hydraulic crusher at the other end by the other ball lock pin.

2. 2. The concrete pillar crushing device according to claim 1, wherein the hydraulic crushers are arranged on all four sides of the outer periphery of the upright concrete pillar to be crushed, at 90° intervals.

3. the frame body includes a pair of identical upper and lower support plates fixed horizontally to the rod cover portion at a base end side with a gap between them, The concrete pillar crushing device described in claim 1 or 2, characterized in that the upper support plate and the lower support plate each have the pin receiving hole at their tip ends, and the piston rod is arranged to be able to move back and forth between the upper support plate and the lower support plate.

4. A concrete column crushing device as described in claim 1 or 2, characterized in that a pair of pin insertion holes of the connecting fitting assembly are arranged to match the pair of pin receiving holes of one of the hydraulic crushers, so that when not connected to another hydraulic crusher, the connecting fitting assembly can be stored and fixed in the one of the hydraulic crushers by the pair of ball lock pins.

5. The concrete pillar crushing device described in claim 3, characterized in that the connecting fitting assembly further has another pair of pin insertion holes formed at intervals around the circumference of the concrete pillar relative to the pair of pin insertion holes, and by selecting one of the other pair of pin insertion holes and inserting the ball lock pin through it, the connecting fitting assembly can be made applicable to concrete pillars of different diameters to be crushed.

6. 4. The concrete pillar crushing device according to claim 3, wherein the connecting fitting assembly comprises an upper connecting plate and a lower connecting plate of the same shape connected in parallel to each other by a vertical connecting pin, and is provided at both ends between the upper support plate and the lower support plate so as to be connectable by the ball lock pin.

7. 7. The concrete pillar crushing device according to claim 6, wherein the upper and lower connecting plates are formed in an arc shape along the outer periphery of the concrete pillar to be crushed.

8. The concrete pillar crushing device according to claim 1 or 2, characterized in that the cutting edge of the crushing blade is flat with a horizontal width greater than its vertical thickness, and is formed in an arc shape facing in the opposite direction so as to contact the outer periphery of the concrete pillar at a point.

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