JPH08120672A - Pile pulling-out device - Google Patents

Abstract

PURPOSE: To promote pulling-out efficiency of a pile and to prevent the collapse of a boring. CONSTITUTION: A pile pulling-out device 1 is bisymmetrically formed as the whole form, a hole 2a is provided to the center section of an upper plate 2, a hole 3a is provided to the center section of a lower plate 3, the lower surface of both ends of the upper plate 2 is connected with cylinder rods 5a and 6a, and the upper surface of both ends of the lower plate 3 is connected with the lower ends of hydraulic cylinders 5 and 6. The upper plate 3 and lower plate 3 are arranged horizontally and parallelly inward from the hydraulic cylinders 5 and 6, two single acting hydraulic cylinders 5 and 6 are bisymmetrically arranged vertically, and two chains 7 and 8 different in length connected to the upper plate 2 inward from the hydraulic cylinders 5 and 6 are bisymmetrically arranged vertically. A left pulling-out device 10 is connected to the lower end of a shorter chain 7 and, at the same time, a hole 10a is provided to the left pulling-out device 10 to connect a pair of regulating plates 10b and 10c to both ends. A right pulling-out device 11 is narrower than an interval between both regulating plates 10b and 10c and is connected to the lower end of the longer chain 8 and, a hole 11a is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile extracting device for extracting a pile by utilizing fluid pressure.

[0002]

2. Description of the Related Art Conventionally, as a pile driving and extracting device, there is Japanese Patent Laid-Open No. 3-17388, which is an automatic propulsion type impact excavator, especially for soil drilling, which propels a cylindrical housing. It is equipped with an impact head (18) to which an impact impulse is applied by an impact piston (1) mounted on the side, the impact piston (1) pulsating by an energy carrier (7, 8, 9) which can be fed into the excavator. A spring (17), which can drive a reciprocating actuation process and which is periodically tensioned and relaxed, is used as an impact piston drive.
For example, when a hollow is created in the roadbed of a railroad, etc., when chemicals are added to the hollow to reinforce the roadbed, an automatic propulsion type impact mining machine vertically propels the vertical hole to the hollow. Then
The piles are driven in, and then they are impacted and retracted to pull out the piles from the soil, and a chemical injection pipe is inserted into the vertical hole that has been formed to reinforce the roadbed by chemical injection into the cavity.

[0003]

However, since the number of piles that can be pulled out in one day is small in the automatic propulsion type impact excavator, the work efficiency is poor, and the impact is generated even when the automatic propulsion type impact excavator is retracted. In addition, since the pile is pulled out and the drilling hole is easily collapsed, it is often the case that the chemical injection pipe cannot be inserted properly, which requires a great deal of construction time and labor for chemical injection.

Therefore, it is an object of the present invention to provide a pile pulling-out device which improves the pulling-out efficiency of the pile and prevents the punched holes from collapsing.

[0005]

SUMMARY OF THE INVENTION According to the present invention, an upper plate having a hole at its center, a lower plate having a hole at its center, and both ends of the upper plate are connected by cylinder rods to form the lower plate. Connected at both ends and the lower end, and the upper plate and the lower plate in parallel,
Two fluid pressure cylinders arranged vertically symmetrically,
Inside the fluid pressure cylinders, two connecting tools that are connected to the upper plate and hang down symmetrically and have different lengths are connected to the lower end of the shorter connecting tool, and a hole is provided. A first extraction tool having a pair of restriction plates connected to both sides, and a second extraction tool having a hole narrower than the interval between the restriction plates and connected to the lower end of the longer connection tool. A device for pulling out a pile, comprising:

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of a pile extracting device 1 according to an embodiment of the present invention will be described below with reference to FIGS.
Has a hole 2a in the center of the upper plate 2 and a hole 3a in the center of the lower plate 3, and is connected to the bottom surfaces of both ends of the upper plate 2 by cylinder rods 5a and 6a. , Lower plate 3
The upper plate 2 and the lower plate 3 are arranged horizontally and in parallel with each other at the upper and lower ends of both ends of the hydraulic cylinders 5 and 6, and the two single-acting hydraulic cylinders 5 and 6 are symmetrically arranged. Two chains 7, which are vertically arranged and which are connected to the upper plate 2 inside the hydraulic cylinders 5 and 6 and have different lengths,
8 is hung down symmetrically, the left pulling tool 10 is connected to the lower end of the shorter chain 7, and the left pulling tool 10
A hole 10a is provided in the hole and a pair of restricting plates 10b and 10c are connected on both sides. The right pulling tool 11 is connected to the lower end of the chain 8 having a width narrower than the interval between the restricting plates 10b and 10c and longer than the hole 11a. Is provided.

Next, the configuration of this embodiment will be described in detail. The upper plate 2 and the lower plate 3 are substantially rhomboidal plate members formed symmetrically with each other, and the central vertical ends thereof are formed with obtuse angles and the left and right ends thereof are rounded. The diameter of the holes 2a and 3a is larger than the outer diameter of the pile 30 (FIG. 5) so that the pile 30 can be inserted into the holes 2a and 3a.
Are aligned so that the pile 30 can be pulled out vertically. On the back side of the upper plate 2, a pair of vertical ribs 2b and 2c for reinforcement are provided in parallel in the lateral direction at a predetermined interval to prevent downward bending of the upper plate 2 due to the tension of the chains 7 and 8. ing. A pair of vertical ribs 2b, 2
The hole 2a and the chains 7 and 8 are arranged between c. Cylindrical anti-vibration rubbers 12 and 13 are connected between both ends of the upper plate 2 and the cylinder rods 5a and 6a by bolts and nuts to prevent vibration of the upper plate 2 and smooth strokes of the cylinder rods 5a and 6a. It has become. Since the height of the upper plate 2 is as high as a knee, the upper portion of the upper plate 2 is a space, and a working space is secured.

The lower ends of the hydraulic cylinders 5, 6 are connected to both ends of the lower plate 3 by bolts and nuts, and the inside of the lower ends of the hydraulic cylinders 5, 6 are connected to the pipe 1 via joints 14, 15.
6 and 17, the pipes 16 and 17 are connected to the joint 18,
The joint 18 is connected to a pneumatic drive hydraulic pump 20 via a pipe 19. The pneumatic drive hydraulic pump 20 receives supply of pneumatic pressure from a pneumatic compressor (not shown), converts the pneumatic pressure into hydraulic pressure to increase the pressure, and supplies the hydraulic pressure to the hydraulic cylinders 5, 6. Pneumatic drive hydraulic pump 20
A tread switch 21 is provided on the upper part of the switch so as to switch between three modes, a stop mode, a mode for supplying hydraulic pressure to the hydraulic cylinders 5, 6 and a mode for discharging hydraulic pressure from the hydraulic cylinders 5, 6. Has become. In the hydraulic pressure supply mode and the hydraulic pressure discharge mode, the cylinder rods 5a and 6a, the anti-vibration rubbers 12 and 13, the upper plate 2, the chains 7 and 8, the left extractor 10 and the right extractor 11 can be integrally raised and lowered. Has become.

Suspension wheels 7a and 8a are fixed to the back surface of the upper plate 2, and the upper ends of the chains 7 and 8 are connected to the suspension wheels 7a and 8a, respectively. The left puller 10 is hung by the chain 7 consisting of seven rings, and the right puller 11 is hung by the chain 8 consisting of nine rings.
Is higher than the right pulling tool 11. The upper plate of the left pulling tool 10 shown in FIG. 2 is bent, and the upper piece is provided with a hole 10d for connecting to the chain 7 and the lower piece is provided with a hole 10a, and is connected to the regulating plates 10b and 10c in an inclined state. There is. Both ends of the upper piece are inclined and have a shape of a constricted end toward the upper side. Both corners of the lower piece are cut out small. The restriction plates 10b and 10c are formed in a single trapezoidal shape, and extend downward from both ends of the lower piece in parallel with each other, and the distance between them is larger than that of the hole 10a. The diameter of the hole 10a is made larger than the outer diameter of the pile 30 and the pile 3
0 can be inserted.

In the right pulling tool 11 of FIG. 3, the restricting plates 10b and 10c are removed from the left pulling tool 10, the width of the right pulling tool 11 is made smaller than the space between the restricting plates 10b and 10c of the left pulling tool 10, and the right pulling tool is pulled out. The tool 11 can be easily inserted or pulled out between the regulation plates 10b and 10c. The right puller 11 has holes 10a, 10 of the left puller 10.
The holes 11a and 11d similar to d are provided.

Next, the operation of the pile pulling-out apparatus 1 of this embodiment applied to pulling out the pile 30 for railroad roadbed chemical injection construction will be described with reference to FIGS. 4 to 6. The pile 30 is tubular and has a long pile formed by connecting a large number of screws on the peripheral surface of the end to form a long pile, but the bottom pile is closed with a sharp tip. The pile pulling-out device 1 can pull out the pile 30 driven into the iron roadbed, rotate the upper end pile with a tool above the pile pulling-out device 1, and release the peripheral screw to separate the pile 30. The details will be described below.

First, the stake 30 is penetrated through the hole 3a, the lower plate 3 is placed on the roadbed, and the stake 30 is penetrated through the hole 11a of the right extractor 11, so that the right extractor 11 naturally descends by its own weight. When stopped, the pile 30 penetrates the hole 10a of the left pulling tool 10 and it naturally descends by its own weight and stops at an appropriate position. When the foot switch 21 is switched, the pneumatic drive hydraulic pump 20 transfers hydraulic pressure to the hydraulic cylinders 5 and 6. Is supplied to the cylinder rods 5a, 6a and the vibration-proof rubber 12, as shown by arrow A.
When the upper plate 13, the upper plate 2, the chains 7 and 8, the left extractor 10 and the right extractor 11 are integrally raised, the state shown in FIG. 4 is obtained. At this time, the left extractor 10 and the right extractor 11 are in the state shown in FIG. That is, the pulling tool 10,
Since 11 is pulled up, the left extractor 10 is inclined downward to the right in FIG.
1 is inclined downward to the left, and the inner peripheral surfaces 10e, 10f of the upper and lower end portions of the hole 10a abut strongly with the outer periphery of the pile 30 (the same applies to the hole 11a). The pile 30 does not fall out, the pile 30 can be reliably pulled out by the tension of the chains 7 and 8, and no special device is required, which is a simple structure.

In FIG. 5B, since the left and right ends 10g and 10h have the same height, there is a gap between the hole 10a and the outer peripheral surface of the pile 30 (the same applies to the hole 11a). . Further, as shown in FIG. 5B, the regulation plates 10b, 10
Since the right extractor 11 is positioned in the space between the left and right c, the longitudinal directions of the left extractor 10 and the right extractor 11 are substantially parallel to each other, and the regulation plates 10b and 10c are regulated. By the action, the right pulling tool 11 does not wobble, and the pile 30 can be reliably pulled out vertically with an even force on the left and right sides. The chains 7 and 8 are not shown in FIGS. 5 (a) and 5 (b).

Next, the foot switch 21 is switched to stop the supply of the hydraulic pressure from the air pressure driven hydraulic pump 20 to the hydraulic cylinders 5 and 6, and the foot switch 21 is further switched to switch the hydraulic cylinders 5 and 6 to the pneumatic driven hydraulic pump. The hydraulic pressure is discharged to 20 and the cylinder rods 5a and 6a and the vibration proof rubber 1
2, 13, the upper plate 2, the chains 7, 8, the left pulling tool 10 and the right pulling tool 11 are integrally lowered. At this time, the inclination angles of the left pulling tool 10 and the right pulling tool 11 are smaller than those of FIGS. 5 (a) and 5 (b), so the lever principle described above does not work, and tension is not applied to the chains 7 and 8. Instead, it relaxes, and the left extractor 10 and the right extractor 11 descend rhythmically while naturally moving up and down under their own weight as shown by arrow B.
At this time, the pile 30 does not move because it is stuck in the roadbed. The left puller 10 and the right puller 11 are chains 7, 8 and a regulation plate 1.
Because it has 0b and 10c, it can fall without wobbling to the left and right.

When the cylinder rods 5a, 6a etc. are lowered to the lower position, the step switch 21 is switched again to supply hydraulic pressure from the pneumatic drive hydraulic pump 20 to the hydraulic cylinders 5, 6 to raise the cylinder rods 5a, 6a etc. Let When the cylinder rods 5a, 6a, etc. have risen to the upper position, the cylinder rods 5a, 6a, etc. are lowered again to the lower position. When the cylinder rods 5a, 6a and the like are repeatedly raised and lowered in this manner, the pile 30 is pulled out from the roadbed, penetrates the hole 2a of the upper plate 2, and protrudes above it to be in the state of FIG. Since the pile 30 does not move in the stop mode and the discharge mode of the pneumatic drive hydraulic pump 20, the upper end pile 31 is rotated as shown by the arrow as shown by the arrow to release the screws of the upper end pile 31 and the pile 30. To separate the pile 31. All the rising piles 31 are separated one after another.

Further, since the height of the upper plate 2 is as high as a knee, a space is secured for disassembling the pile 30 using a tool. Therefore, the operation of raising and lowering the cylinder rods 5a, 6a, etc. while switching the foot switch 21 with the foot, and rotating the upper pile 31 each time the pile 30 is lifted by operating the tool by hand to rotate the pile 30 and the pile 31. The work of releasing the connecting screw and disassembling can be done by one person at the same time.

When the pulling-out of one pile 30 is completed in this way, the pile 30 is moved to the position of the next pile and the pulling-out operation is repeated. Since the pile pulling-out device 1 and the pneumatic drive hydraulic pump 20 are small and lightweight, and the pneumatic compressor is also lightweight, they are extremely easy to move. It is also possible to work on an inclined surface.

Although the present embodiment has been described above, it goes without saying that the structure of the present invention can be appropriately changed without departing from the technical idea of the present invention. Of course, the holes 10a and 11a are not limited to circles and may be elliptical. A hydraulic source may be used instead of the pneumatic compressor.

[0019]

As described above, in the pile extracting device of the present invention, when fishing the chain with the cylinder rod and the upper plate, the inner peripheries of the holes of the first extractor and the second extractor are of the pile. By contacting with the outer circumference, the lever principle works to securely hold the pile, and the regulation plate of the first pull-out tool regulates the movement of the second pull-out tool, so that the pile can be vertically moved with even force. Can be raised to. When the cylinder rod and the upper plate descend, the first pulling tool and the second pulling tool naturally fall due to their own weight, so that work can be performed without a drive source. Therefore, the work efficiency is excellent, and the extraction efficiency of the pile is extremely high.

Further, since the whole structure is simple, it is extremely easy to move and has high mobility, it can be manufactured inexpensively by using a commercially available product, and the number of workers is almost one, which contributes to the reduction of workers. You can

[Brief description of drawings]

FIG. 1 is a perspective view of the present embodiment.

FIG. 2A is a front view of the left pulling tool of this embodiment,
(B) is the same left side view, (c) is the same plan view.

FIG. 3A is a front view of the right pulling tool of this embodiment,
(B) is the same left side view, (c) is the same plan view.

FIG. 4 is a perspective view showing an operation state of the present embodiment.

5A is a partially enlarged perspective view showing a state in which a pile is pulled up by a left pulling tool and a right pulling tool, and FIG. 5B is a partially enlarged right side view of the same.

FIG. 6 is a perspective view showing an operation in which the pile is lifted and the tip pile is separated.

[Explanation of symbols]

 1 Pile Extractor 2 Upper Plate 3 Lower Plate 2a, 3a Holes 2b, 2c Vertical Ribs 5, 6 Hydraulic Cylinders 5a, 6a Cylinder Rod 7, 8 Chain 7a, 8a Suspension Wheel 10 Left Extractor 10b, 10c Restriction Plate 10d, 11d Connection holes 10e, 10f Upper and lower end inner peripheral surfaces 10g, 10h Left and right end portions 11 Right extraction tool 10a, 11a Holes 12, 13 Anti-vibration rubber 14, 15, 18 Joints 16, 17, 19 Pipe 20 Pneumatic drive hydraulic pump 21 Foot switch 30 Pile 31 Top pile

Claims (1)

[Claims] 1. An upper plate having a hole in the center, a lower plate having a hole in the center, both ends of the upper plate connected by cylinder rods, and both ends of the lower plate connected at the lower end, Moreover, the upper plate and the lower plate are parallel to each other, and two fluid pressure cylinders are arranged symmetrically and vertically, and are connected to the upper plate on the inner side of these fluid pressure cylinders and hang down symmetrically. Two connecting tools of different lengths, a first pulling tool connected to the lower end of the shorter connecting tool and having a pair of restricting plates on both sides, and a gap between the restricting plates And a second pulling tool having a hole, which is connected to a lower end of the longer connecting tool and has a second pulling tool.