JPH0632991Y2 - Static load type press-in / pull-out machine - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of the Invention [0001] The present invention relates to a static load type press-fitting / pulling machine, and in particular, by improving an existing pile clamping device for obtaining a reaction force,
The present invention relates to a structure capable of correcting the attitude of a press-fitting / extracting machine main body even when an existing pile is inclined.

2. Description of the Related Art Recently, static load type pile press-in / pull-out machines have been used instead of vibro hammers for earth retaining work in the foundation work of various buildings. It is equipped with a reaction force clamp below the fixed base, and a pile press-in / pull-out cylinder is installed on a support arm standing upright on the base, and a pile gripping device is used for an elevator vertically driven by the pile press-in / pull-out cylinder. Is attached and the pile gripping device is moved up and down. The pile gripping device has a built-in chuck cylinder, and the chuck cylinder firmly grips a steel sheet pile as a built-in pile and press-fits it into and pulls it out from the soil.

As the reaction force clamp, a fixed claw that normally abuts on one surface of the existing pile and a movable claw that abuts the other surface of the existing pile, and the existing pile is provided between the fixed claw and the movable claw. After the clamp is clamped, the movable claw is pressed against the fixed claw side by the action of the clamp cylinder to firmly clamp the movable claw. In this way, the steel sheet pile is gripped by the chuck cylinder built in the pile gripping device while taking the reaction force by the reaction force clamp, and the pile press-in / pull-out cylinder performs the press-in / pull-out work of the pile.

In addition to the steel sheet pile, H-shaped steel may be used as the type of pile. Ordinary steel sheet pile has section portions formed at both left and right ends, and when press-fitting into the soil, the section portion can be connected continuously with the section portions of other steel sheet piles. Is done.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a conventional pile press-fitting / pulling-out machine, the reaction force clamp for clamping the existing pile cannot be tilted with respect to the gripping direction of the existing pile. , The pile press-in / extractor main body may be tilted to the left or right from the vertical direction due to the inclination of the existing pile, and therefore, auxiliary means for correcting the posture of the pile press-in / extractor main body is required, and the work is also required. There was a problem that was complicated.

That is, when the pile is press-fitted into the soil, the pile does not always enter vertically, and the pile may be tilted in either the left or right direction depending on the working conditions and soil quality. Therefore, when the existing pile is clamped by the reaction force clamp when a new pile is press-fitted, the pile press-fitting / pulling machine main body itself tends to be inclined to the left or right due to the inclination of the existing pile.

If the inclination of the pile press-in / pull-out machine main body is small, there is no problem in continuing the work.However, if the inclination is high, the pile press-in / pull-out can be performed using auxiliary means such as an outrigger or a crane lifting support. The attitude of the machine body must be corrected. The use of such an auxiliary means has a drawback that it cannot be used in a small city area or a place adjacent to a building, in addition to increasing the work process,
Furthermore, since the existing pile is forcibly bent at the time of the above-mentioned correction, there is a problem that the pile is damaged.

Therefore, the present invention solves various problems of the conventional static load type pile press-in / pull-out machine, and described above even when the existing pile is inclined in either the left or right direction. It is an object of the present invention to provide a device capable of correcting a pile press-fitting / pulling-out machine main body in a direction perpendicular to the ground by a simple means without requiring auxiliary means.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention comprises a reaction force clamp device which is located below a base set on an existing pile and clamps the existing pile during work. A press-fitting / pulling machine body and a guide frame are erected above the base, and a swingable pile gripping device that firmly chucks the steel sheet pile to be press-fitted / pulled out is attached to the bottom of the lifting body that moves up and down along the guide frame. In the static load type pile press-fitting / extracting machine configured as described above, first, according to claim 1, a pair of upper and lower clamp cylinders having movable pawls are provided on one surface of a space portion formed in the reaction force clamp device. Then, on the surface of the other side of the space portion, and at a portion facing the clamp cylinder,
3. A fixed claw that is rotatably attached to a reaction force clamp device by a support pin and that presses the movable claw is arranged. According to claim 2, between the base and the reaction force clamp device. , The cylinder body side is fixed to the base,
A static load type pile press-fitting / extracting machine is provided in which a clamp left / right replacement cylinder is provided in which a tip portion of a rod protruding from the cylinder body is connected to a reaction force clamp device.

Further, according to claim 3, the clamp cylinders are hydraulically piped so that they can be operated independently.

According to the structure of claim 1, when the normal pile press-in / pull-out is performed, after the existing pile is clamped by using the reaction force clamp device, the steel sheet pile is installed in the pile gripping device and provided in the press-in / pull-out machine main body. Pressing and pulling work of the steel sheet pile is carried out by the action of the pile gripping device which is pivotally mounted on the lower part of the lifting body by vertically moving the lifting body by the pair of press-fitting and drawing cylinders.

In the above action, by inserting the existing pile into the space formed in the reaction force clamp device and supplying hydraulic pressure to the pair of upper and lower clamp cylinders arranged on the one surface of the space, The movable claw built in the clamp cylinder abuts on the existing pile, and the existing pile can be clamped between the movable claw and the fixed claw arranged on the other surface of the space.

Since the fixing claw is rotatably attached to the reaction force clamp device, the base can be tilted after the existing pile is clamped. Also, since the clamp cylinders are hydraulically piped so that they can be operated independently, the strength of the clamping force on the existing pile is adjusted as appropriate to change the pressure contact force of the movable claw when the base is tilted. be able to.

Therefore, even if the existing pile is tilted to the left or right in the traveling direction, the posture of the base and the press-fitting / extracting machine body placed on the base is tilted by tilting the base around the fixed claw. Can be corrected in a direction perpendicular to.

When the press-fitting or pulling-out work of one steel sheet pile is completed and the main body is moved, the reaction force is changed by driving the clamp left / right replacement cylinder provided between the base and the reaction force clamp device. The clamp device can be moved in a direction perpendicular to the traveling direction of the press-fitting / extracting machine main body.

Embodiment An embodiment of a static load type pile press-fitting / extracting machine according to the present invention will be described below with reference to the drawings.

In the configuration shown in FIGS. 1 and 2, reference numerals 1 and 1 denote reaction force clamp devices, and the reaction force clamp devices 1 and 1 are located below a base plate 2 that is set on an existing pile and are used during work. It has a function of clamping the existing pile.

A press-fitting / pulling machine main body 3 and a guide frame 4 are erected above the base plate 2, and an elevating / lowering body 6 is provided for moving up and down along the guide frame 4. The lifting body 6
A pile gripping device 7 for firmly chucking a steel sheet pile to be driven is attached to the lower part of the so as to be rotatable.

Further, a pair of press-fitting / extracting cylinders 5, 5 are provided on the left and right of the press-fitting / extracting machine main body 3, and the lifting / lowering body 6 is driven up and down by the press-fitting / extracting cylinders 5, 5. Reference numeral 8 is a cylinder for freely undulating the guide frame 4.

Next, referring to FIG. 3, a detailed description will be given of the reaction force clamp devices 1, 1.

A clamp left / right replacement cylinder 11 is provided between the base 2 and the reaction force clamp device 1.

The clamp left / right replacement cylinder 11 is fixed to the base 2 on the cylinder body side, and the tip of a rod 11 a protruding from the cylinder 11 is connected to the reaction force clamp device 1 via a mounting pin 12. Therefore, by driving the clamp left / right replacement cylinder 11, the reaction force clamp device 1 can be moved in the direction perpendicular to the traveling direction of the press-fitting / extracting machine main body 3.

In the reaction force clamp device 1, a space portion 20 through which a steel sheet pile (not shown) can be inserted is formed, and the space portion 2 is formed.
A pair of upper and lower clamp cylinders 13,
14 are provided, and the clamp cylinders 13, 1
The movable claws 13a and 14a are incorporated in the unit 4. The clamp cylinders 13 and 14 are hydraulically connected so that they can be operated independently.

Furthermore, on the other surface of the space portion 20, the movable claw 13 is provided at a portion facing the clamp cylinders 13 and 14.
A fixed claw 15 is provided which presses a and 14a.
The fixed claw 15 is rotatably attached to the reaction force clamp device 1 by a support pin 16. The support pin 16 is set so as to be located at an intermediate portion between the clamp cylinders 13 and 14 located in the vertical direction.

The operation of the static load type pile press-fitting / pulling machine of the present invention having the above construction will be described below.

At the time of normal press-fitting / pulling-out of the pile, the reaction force clamp device 1, 1
The existing pile is clamped by using, and the guide frame 4 is undulated by the cylinder 8 to build a steel sheet pile in the pile gripping device 7, and the steel sheet pile to be driven is firmly fixed by the chuck cylinder built in the pile gripping device 7. Chuck. Next, the lifting body 6 is driven up and down by the pair of press-fitting and drawing cylinders 5 and 5 provided on the left and right of the press-fitting and drawing machine body 3.
Then, the pile gripping device 7 rotatably attached to the lower portion of the lifting body 6 moves up and down in conjunction with the lifting body 6, so that the press-pulling work of the steel sheet pile is performed.

In the above operation, the existing pile is inserted into the space portion 20 formed in the reaction force clamp device 1, and a pair of upper and lower clamp cylinders 13 disposed on one surface of the space portion 20,
When hydraulic pressure is supplied to the inside of the clamp cylinder 1,
The movable claws 13a and 14a built in 3, 14 contact the existing pile, and clamp the existing pile between the movable claws 13a and 14a and the fixed claw 15 arranged on the other surface of the space 20.

Since the fixed claw 15 is rotatably attached to the reaction force clamp device 1 by the support pin 16 as described above, the base 2 can be tilted about the support pin 16. At this time, the clamp cylinders 13, 1
Since 4 are hydraulically piped so that they can be operated independently, the movable claws 13 and 14 when the base 2 is tilted are adjusted by appropriately adjusting the strength of the clamping force on the existing pile.
The pressure contact force of can be changed.

Therefore, even if the existing pile is inclined to the left or right of the traveling direction, the base 2 and the press-fitting / extracting machine main body 3 arranged on the base 2 are tilted by tilting the base 2 around the support pins 16. The posture of can be corrected in the direction perpendicular to the ground.

Further, when the press-fitting or pulling-out work of one steel sheet pile is completed and the main body is moved, the clamp left / right replacement cylinder 11 arranged between the base 2 and the reaction force clamp device 1 is used.
By driving, the reaction force clamp device 1 can be moved in the direction perpendicular to the traveling direction of the press-fitting / extracting machine main body 3. That is, the clamp surface of the steel sheet pile that is normally press-fitted into the ground is shifted in zigzag in the left and right of the traveling direction in plan view. Therefore, by driving the clamp left / right replacement cylinder 11, the steel sheet pile is displaced as described above. Can be dealt with.

Effects of the Invention As described in detail above, according to the static load type press-fitting / pulling-out machine according to the present invention, the reaction force clamp that is located below the base fixed on the existing pile and clamps the existing pile at the time of work. It is equipped with a device, and a press-fitting / extracting machine main body and a guide frame are erected above the above-mentioned base, and the steel sheet pile to be press-fitted and withdrawn is firmly chucked at the lower part of the elevating body that moves up and down along the guide frame. In a static load type pile press-fitting / extracting machine equipped with a different pile gripping device, first, according to claim 1, a pair of upper and lower sides having movable pawls built in on one surface of a space formed in the reaction force clamping device. Of the movable claw, which is rotatably attached to the reaction force clamp device by a support pin on the other surface of the space and at a portion facing the clamp cylinder. Has a fixed claw for pressing
According to claim 2, between the base and the reaction force clamp device, there is provided a clamp left / right replacement cylinder in which a cylinder body side is fixed to the base body and a tip of a rod protruding from the cylinder body is connected to the reaction force clamp device. The static load type press-fitting / pulling-out machine is configured as described above, and further, according to claim 3, the clamp cylinders are hydraulically piped so that they can be operated independently of each other. To be

That is, even when the pile press-in / pull-out machine main body tilts from the vertical direction to either the left or right due to the inclination of the existing pile, the fixed claws attached to the portion facing the movable claws built in the clamp cylinder. Is rotatably attached to the reaction force clamp device, it is possible to tilt the base after clamping the existing pile. Therefore, even if the existing pile is inclined to the left or right of the traveling direction,
By tilting the base around the fixed claw, the posture of the base and the press-fitting / extracting machine body arranged on the base can be corrected in a direction perpendicular to the ground. Therefore, the auxiliary means for correcting the posture of the pile press-in / pull-out machine such as the outrigger or crane is not required, and the work is simplified, and the pile press-in / pull-out machine main body can be used even in a small city or a place adjacent to a building. The effect is that it can be used. Moreover, since the existing pile is not bent at the time of the above-mentioned modification, the pile is not damaged. In addition, since the clamp cylinders are hydraulically piped so that they can be operated independently, the strength of the clamping force on the existing pile can be adjusted as appropriate to change the pressure contact force of the movable pawl when the base is tilted. You can

On the other hand, when the press-fitting or pulling-out work of one steel sheet pile is completed and the main body is moved, the reaction force is changed by driving the clamp left / right replacement cylinder provided between the base and the reaction force clamp device. The clamp device can be moved in a direction perpendicular to the traveling direction of the press-fitting / extracting machine main body.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a static load type pile press-fitting / pulling machine according to the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is an enlarged sectional view of an essential part showing the structure of a reaction force clamping device. 1 ... Reaction force clamp device, 2 ... base plate 3 ... press-fitting / extracting machine body, 4 ... guide frame 5 ... press-fitting / extracting cylinder, 6 ... elevating body 7 ... pile gripping device 11 ... clamp left / right replacement cylinder 12 ... Mounting pin 13,14 ... Clamp cylinder 13a, 14a ... Movable pawl 15 ... Fixed pawl, 16 ... Support pin 20 ... Space

Claims (3)

[Scope of utility model registration request] 1. A reaction force clamp device, which is located below a base set on an existing pile and clamps the existing pile at the time of work, above the base, a press-fitting / extracting machine main body and a guide frame stand. A static load type pile press-fitting / pulling machine in which a pivotable pile gripping device for firmly chucking a steel sheet pile to be press-fitted / pulled is attached to a lower part of an elevating body which is installed and is elevated along the guide frame. A pair of upper and lower clamp cylinders, each having a movable claw, is arranged on one surface of the space formed in the force clamp device, and the pair of upper and lower clamp cylinders are arranged on the other surface of the space and face the clamp cylinder. A static load type pile press-fitting / extracting machine, in which a fixed pawl, which is rotatably attached to a reaction force clamp device by a support pin and presses the movable pawl, is arranged at a portion of the pile. 2. A clamp left / right replacement cylinder is provided between the base and the reaction force clamp device, the cylinder body side being fixed to the base body, and the tip of the rod protruding from the cylinder body being connected to the reaction force clamp device. The static load type pile press-fitting / pulling machine according to claim 1. 3. The clamp cylinders are hydraulically piped so that they can be operated independently.
Static load type press-fitting / pulling machine described.