JP2828693B2 - Hydraulic concrete hole crusher - Google Patents

Description

The present invention relates to a device for crushing a concrete wall buried in the soil, and more specifically, to a device for crushing a concrete wall buried in the soil. The present invention relates to a hydraulic concrete hole crusher which is inserted and extended by hydraulic pressure to crush both sides of the hole into cracks.

(Prior Art) Conventionally, a plurality of holes have been made in a concrete wall, and a thin portion between the hole and the outer wall has been cracked by an operator from the outside by using cracks or the like.

(Problems to be Solved by the Invention) Conventionally, it is necessary to remove the earth and sand around the concrete wall in the soil with a width of about 1 m so that a worker can put in the soil, and the number of processes is inefficient. Was. In addition, there is a problem that the crushing operation using a rag or the like consumes physical strength of an operator and takes time.

The present invention has been made in view of the above-mentioned problems of the related art, and crushes a concrete wall by oil pressure, and the work can be easily performed from the ground and the work time can be reduced. It is an object of the present invention to provide a hydraulic concrete hole crusher that can be made and has excellent durability.

(Means for Solving the Problems) In order to achieve the above object, a hydraulic concrete hole crusher according to the present invention comprises a base member formed in a notched column, and an arc-shaped column substantially corresponding to the notch. In the hydraulic concrete hole crusher, the base member has a cylinder cavity, and is slidably fitted in the cylinder cavity to press the mover member. A hydraulic plunger is provided, and the mover member is supported by a plurality of guide pins projecting from the base member slidably engaged with a plurality of guide holes, and
It is always urged in the direction of the base member by a tension coil spring.

Further, a plurality of guide holes of the mover member are formed as elongated holes in the up-down direction, and one of the guide holes has a compression coil between the guide pin engaged with the mover member and the mover member vertically upward from the guide pin. A compression coil spring can be interposed in the other guide hole between the guide pin engaged with the spring and the mover member in a vertically downward direction.

The base member may be provided with a guide hole instead of the guide pin, and the mover member may be provided with a guide pin instead of the guide hole.

Further, a rubber cover for an upper surface that covers above a gap between the base member and the mover member caused by extension of the mover member, and a rubber cover for a side surface that covers sides of the gap may be attached to the base member. .

Then, a direction correcting shaft may be integrally provided on the upper surface of the base member.

(Operation) In the hydraulic concrete hole crusher having such a configuration, the mover member is pressed by the hydraulic pressure applied to the hydraulic plunger in the hole formed in the concrete wall, and the base member and the mover member are relatively enlarged. Accordingly, the mover member presses the thin portion with the blade portion provided at the tip thereof, and the rear portion of the base member receives the reaction force thereof, thereby generating a crack in the thin portion and crushing the concrete wall.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 4, the hydraulic concrete hole crusher 1 is composed of two main members, a base member 2 and a mover member 3, and has a hole 4 formed in a concrete wall.
Is formed in a substantially columnar shape as a whole.

The base member 2 is formed to have a substantially semicircular cross section, and the cutout is formed in a flat vertical surface 5. A cylinder cavity 6 is provided at the center of the vertical surface 5, and a hydraulic passage 10 communicates with the quick coupler 11 at the rear from the cylinder cavity 6. The hydraulic plunger 7 is slidably fitted in the cylinder cavity 6 and is sealed by an O-ring 8.
The front surface of the hydraulic plunger 7 is formed in a spherical shape and comes into contact with the pressing portion 36 of the mover member 3 at a point. Here, the concave portion 35 formed in the circumferential direction is provided so that the hydraulic plunger 7 can be easily pulled out with a finger during maintenance. Further, the wiper ring 9 prevents intrusion of foreign matter and the like from outside, and prevents the cylinder cavity 6 and the hydraulic plunger 7 from being damaged. In the figure, reference numeral 12 denotes a mounting ring with which the suspension chain is engaged.

The mover member 3 has a size substantially corresponding to a cutout portion of the base member 2, and has a blade portion 13 having a mountain-shaped cross section at the top of the circumference.

The base member 2 and the mover member 3 are connected by a tension coil spring 14, and a guide pin 15 and a guide hole 16 are provided.
The spring holder 18 and the bolt 19 are inserted into the spring hole 17 of the base member 2 from the rear, and the nut is screwed to the bolt 19. The end 20 of the tension coil spring 14 is fixed by 21, while the hook-shaped other end 22 of the tension coil spring 14 is connected to the mover member 3.
The mover member 3 is constantly urged in the direction of the base member 2 by being hooked on the bolt 24 inserted into the spring mounting hole 23 of the first embodiment.

A guide pin 15 protruding from the vertical surface 5 of the base member 2 at a relative position is loosely inserted into a guide hole 16 formed in the mover member 3 in a vertically long hole. The force of the compression coil spring 25 acts on one of the guide pins 15 from above in the vertical direction, and the force of the compression coil spring 26 acts on the other guide pin 15 from below in the vertical direction. Since the compression coil spring 25 receives the weight of the mover member 3, the compression coil spring 25 is set to balance the force of the compression coil spring 26 when the weight is subtracted. In other words, the compression coil spring 25 is set to a force obtained by adding the weight of the mover member 3 to the predetermined spring force α, and the compression coil spring 26 is set to the force α. One end of each of the compression coil springs 25 and 26 has a screw hole formed in the mover member 3.
It is received by a plug 28 screwed into 27, and the other end is a guide pin
The sliding guide 29 abutting on 15 is pressed.

In addition, assuming that the same effect as the above-described support structure can be obtained, the compression coil springs 25 and 26 are connected to one guide pin.
There is one attached to 15 from the top and bottom at the same time. Further, a guide pin protrudes from the mover member 3, a guide hole is formed in the base member 2, and a compression coil spring 25 receiving the weight of the mover member 3 is installed below the guide pin. A structure in which the coil spring 26 is installed above may be used.

As described above, the mover member 3 includes the compression coil spring 2
5 and 26, the hydraulic plunger 7
Has a structure in which any unbalanced load such as the weight of the mover member 3 is not applied. Further, the mover member 3 is supported vertically and inclinably while the rapid movement is restricted by the compression coil springs 25 and 26 within a range in which the guide pin 15 moves within the elongated hole of the guide hole 16.

The stopper 30 is inserted into the insertion hole 31 of the mover member 3 and screwed to the screw portion 32 of the base member 2, and the flange portion 34 of the stopper 30 and the stopper receiving portion 33 of the mover member 3
To prevent the hydraulic plunger 7 from extending beyond the position where it abuts.

Here, the operation and operation of the hydraulic concrete hole crusher 1 will be described.

This hydraulic concrete hole crusher 1 is suspended by a plate-like chain engaged with a mounting ring 12 and is provided with a plurality of holes 4 vertically drilled in a concrete wall buried in the soil. The part 13 is inserted while being adjusted so as to face the thin part. At this time, the periphery of the concrete wall may be excavated with a narrow width enough to allow the crushed block pieces to fall. The hydraulic pressure acting on the hydraulic plunger 7 is supplied from an external hydraulic pressure source via a hydraulic hose connected to the quick coupler 11.

The crushing operation of the concrete wall is performed sequentially from the lower part of the hole 4 to the upper part, in order to prevent the crushed block pieces from getting in the way. That is, when hydraulic pressure is applied to the hydraulic plunger 7 of the hydraulic concrete hole crusher 1 positioned at a predetermined position in the hole 4, the hydraulic plunger 7 expands and presses the pressing portion 36 of the mover member 3, and the base member 2 The blade 13 of the mover member 3 presses the thin portion of the concrete wall, receives the reaction force on the rear surface of the base member 2 and increases the oil pressure as it is, thereby increasing the oil pressure. Causes cracks in the thin-walled portion and breaks.

The positional relationship between the base member 2 and the mover member 3 during the crushing is such that the mover member 3 moves horizontally until the blade portion 13 comes into contact with the hole 4, and after the contact, the crushing progress state, that is, the crack is normally Due to the fact that it spreads greatly from the end of the concrete hole,
The guide hole 16 can be freely inclined within the moving range of the long hole of the 15 guide holes 16.
Here, the inclination of the mover member 3 causes the hydraulic plunger 7 to move.
No twisting or unbalanced load acts on the guide pin 15 or the like.

When the crushing progresses greatly, the stopper 30 prevents the mover member 3 from being detached, and then the hydraulic pressure is released, whereby the mover member 3 is pulled back toward the base member 2 by the force of the tension coil spring 14.

As another embodiment, a double-acting hydraulic plunger may be used instead of the tension coil spring 14 of the above-described embodiment to engage the distal end with the mover member 3 and hydraulically control both reciprocation.

As still another embodiment, if a blade having a mountain-shaped cross section similar to the blade 13 provided on the mover member 3 is provided at the rear portion of the base member 2, the thin portions on both sides of the concrete mold can be simultaneously crushed. .

5 to 7 show a base member 2 and a mover member 3;
This shows another embodiment in which a rubber cover 50 for the upper surface and a rubber cover 51 for the side surface are provided so as to cover the gap between the base member 2 and the shaft 52 for correcting the direction is provided above the base member 2. is there. The other parts are the same as those in the above embodiment.

The rubber cover 50 for the upper surface is fixed to the upper surface 54 of the base member 2 by tightening the mounting ring 12 via the holding plate 53. Even when the gap between the base member 2 and the mover member 3 is at the maximum, the upper surface of the rubber cover 50 is located above the gap. Is formed in a projecting shape on the mover member 3 side so as to cover sufficiently. The side rubber cover 51 is formed in an L-shape, and is attached to both sides of the vertical surface 5 of the base member 2 by fixing screws 55. Similarly, the side of the gap between the base member 2 and the mover member 3 is formed. Is covered. Therefore, in the crushing operation of the concrete wall, the crushed block pieces are sandwiched between the base member 2 and the mover member 3, and the return failure of the mover member 3 is prevented.

The direction correcting shaft 52 includes a shaft portion 56 integrally formed on the upper surface of the base member 2 and a pin 57 inserted in the shaft portion 56 in a circumferential direction, and is shown in FIG. Jig like
By engaging 58, the hydraulic concrete hole crusher 1 is rotated,
This is for adjusting the blade portion 13 of the mover member 3 to a predetermined position. The jig 58 includes an insertion pipe 59 and an extension pipe 60, and at the tip of the insertion pipe 59, an insertion joint 62 that is engaged with a direction correcting shaft 52 provided with a groove 61 into which a pin 57 is introduced is provided. A hex bolt 63 into which a T-type wrench is fitted is provided at one end of the extension pipe 60.
The screw portion 64 of the insertion pipe 59 and the nut portion 65 of the extension pipe 60 are integrated by screwing and tightening.

In the drawing, reference numeral 66 denotes an attachment which is arbitrarily attached to the back surface 67 of the base member 2 in order to match the size of the concrete hole to be crushed.

(Effects of the Invention) As described above, according to the hydraulic concrete hole crusher of the present invention, crushing of a concrete wall can be performed easily and in a short time by using hydraulic pressure.
The steps associated with the operation can also be reduced.

Furthermore, since the cracks generated during crushing are not uniform in the vertical direction, the mover member is inclined with respect to the base member, but even in this case, excessive force is not applied to the hydraulic plunger, guide pins and guide holes, and reliability and reliability are improved. The durability can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a hydraulic concrete hole crusher of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, FIG. FIG. 4 is a sectional view taken along the line BB of FIG. 1, FIG. 4 is an exploded view, FIG. 5 is a front view of a hydraulic concrete hole crusher showing another embodiment, FIG. FIG. 7 is a top view of the same, FIG. 8 is an assembly view of the jig. 2 ... Base member, 3 ... Mover member, 6 ... Cylinder cavity, 7 ... Hydraulic plunger, 13 ... Blade, 14 ... Tension coil spring, 15 ... Guide pin, 16 ... Guide hole, 25 , 26… Compression coil spring, 50… Rubber cover for top, 51… Rubber cover for side, 52… Shaft for direction correction.

Claims (5)

(57) [Claims] 1. A hydraulic concrete hole crusher comprising: a base member formed in a notched column; and a mover member having an arcuate column substantially corresponding to the notch, and having a mountain-shaped blade at the top of the arc. The base member has a cylinder cavity, and includes a hydraulic plunger slidably fitted in the cylinder cavity to press the mover member, and the mover member is slidably engaged with the plurality of guide holes. Supported by a plurality of guide pins projecting from the base member, and
A hydraulic concrete hole crusher characterized by being constantly urged toward a base member by a tension coil spring. 2. A plurality of guide holes of the mover member are formed in a vertically long hole, and one of the guide holes is vertically spaced from a guide pin engaged with the mover member. A compression coil spring is interposed between the guide pin engaged with the other guide hole and the mover member in a vertically downward direction in the other guide hole. The hydraulic concrete hole crusher according to claim 1. 3. The hydraulic concrete hole crusher according to claim 1, wherein the base member has a guide hole instead of a guide pin, and the mover member has a guide pin instead of the guide hole. That, a hydraulic concrete hole crusher. 4. A rubber cover for an upper surface covering an upper portion of a gap between the base member and the mover member caused by extension of the mover member, and a rubber cover for a side surface covering a side of the gap are attached to the base member. The hydraulic concrete hole crusher according to claim 1, 2 or 3, wherein: 5. The hydraulic concrete hole crusher according to claim 1, wherein a direction correcting shaft is integrally provided on an upper surface of said base member.