JPH0716752Y2 - Extraction device for underground casting - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing device for drawing steel sheet piles or the like placed in the ground.

[0002]

2. Description of the Related Art In civil engineering work, steel sheet piles driven into the ground to stabilize the ground and form retaining walls need to be pulled out when the work is completed. Have been served.

[0003]

By the way, the conventional extraction device has a problem that the structure is complicated and large in size and the equipment cost is high because of utilizing the vibration etc. Therefore, the structure is simple and the equipment is expensive. At present, there is an awaited proposal for a device that is low in cost and that can efficiently pull out a sheet pile without vibration.

In view of the above points, the present invention has an object to provide an extracting device for an underground driven article which has a simple structure and can reliably extract a sheet pile or the like without vibration.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is directed to a boom tip of a working machine and a ground surface.
Install the pillars to be placed between the large-diameter lower pipe and the lower
It fits in the pipe so that it can move in the axial direction freely, and
Position can be adjusted vertically by pin connection with the pipe
With a small diameter upper pipe,
The lower position can be changed, and the lower pipe
A wire is wound in multiple turns between an upper parallel pulley attached to a movable member abutting on the upper end surface and pivotally fixed to the movable member, and a lower parallel pulley arranged below the upper parallel pulley. Is fixed to a movable member, the other end is wound around a drum of a working machine, and the lower parallel sheave is provided with a clamp for an underground driven object.

[0006]

[Operation] In order to pull out the sheet pile that has been driven into the ground, a strut is arranged between the boom tip of the working machine and the ground, the movable member of the upper parallel pulley is fixed to the strut, and the clamp of the lower parallel sheave is fixed. When the wire is wound by the drum of the working machine while being connected to the upper end of the sheet pile, the lower parallel sheave moves upward and the sheet pile is pulled out.

Since the sheet pile is pulled out by the upper parallel pulley fixed at a fixed position with respect to the column, the movable lower parallel pulley and the multiple winding wire wound between them, the sheet pile is pulled by a small pulling force according to the principle of the heavy pulley. When the sheet pile pullout resistance is large, the movable member can be fixed to the column at the lower position of the column, and the force of the sheet pile pulling force due to the wire winding moves downward. As a result, the posture of the working machine becomes stable, and the pulling force of the sheet pile of the working machine can be improved.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, at a tip of a boom 2 of a self-propelled working machine 1 having a well-known structure, which can be raised and lowered, a support column 3 vertically arranged between the tip of the boom 2 and the ground is provided. The upper end is pivotally connected.

The column 3 is composed of a combination of a large-diameter lower pipe 4 and a small-diameter upper pipe 5 which is fitted in the pipe 4 so as to be movable in the axial direction. The lateral holes 6 are provided at predetermined intervals in the axial direction, and the lateral holes 7 are also provided at the ends of the other pipes. As shown in FIG.
By connecting the upper and lower pipes 4 and 5 with each other and selecting the connecting position at the intervals of the lateral holes 6, the vertical height can be changed.

The upper pipe 5 has its upper end pivotally fixed by a pin 10 to a head fitting 9 attached to the tip of the boom 2, and a movable member 11 can be vertically moved in the upper pipe 5. Installed.

The movable member 11 can be fixed to the upper end portion of the upper pipe 5 by a removable pin 12, and an upper parallel pulley 13 is rotatably attached to the front side of the movable member 11 so that the pin can be rotated. When 12 is taken out, it can be moved down along the upper pipe 5 and brought into contact with the upper end of the lower pipe 4 to move to the lowered position supported.

A clamp 15 for holding the sheet pile A by an operation such as hydraulic pressure is provided on a lower parallel pulley 14 arranged on the front side of the support column 3 below the upper parallel pulley 13 and the lower parallel pulley 14 and the upper portion. Wire 16 between parallel pulleys 13
Is wound in multiple turns, and one end of the wire 16 has a movable member 11
The pulley 1 fixed to the head 9 and attached at the other end to the head 9
It is pulled out from the tip of the boom 2 to the working machine 1 side via the coil 7, and is wound around a winch drum 18 provided in the working machine 1.

Therefore, the lower parallel pulley 14 is the upper parallel pulley 1
3 is suspended and held by the wire 16 wound in multiple turns, and is moved up and down by winding and unwinding the wire 16 by the drum 18.

The pulling-out device of the present invention has the above-mentioned structure, and in order to pull out the sheet pile A placed in the ground, the working machine 1 is brought close to the sheet pile A as shown in FIG. The lower end of the support column 3 set to the height is grounded at a position close to the sheet pile A, and the angle of the boom 2 is set so that the support column 3 is vertical.

At this time, the movable member 11 is fixed to the upper end portion of the upper pipe 5 by the pin 12, and the clamp 1 of the lower parallel sheave 14 lowered by the feeding of the wire 16.
5 is fixed to the upper end of the sheet pile A, and in this state, the drum 18 of the working machine 1 is activated to wind the wire 16, and the upper parallel pulley 13 serving as the fixed pulley is moved to the lower parallel serving as the moving pulley. The pulley 14 is pulled up, an upward pulling force acts on the sheet pile A via the clamp 15, and the sheet pile A is pulled out.

When pulling out the sheet pile A, since the pulling-out is performed by the upper parallel pulley 13, the lower parallel pulley 14, and the multi-winding wire 16 wound between them, the winding force of the wire 16 is increased by the principle of the heavy pulley. To generate a pulling force, and thus the sheet pile A can be pulled out statically without applying vibration.

By pulling out the sheet pile A, the lower parallel pulley 14
As it goes up, the reaction force at the time of pulling out can be stably supported by the grounded column 3 and the working machine 1.

When the pulling-out resistance of the sheet pile A is large, as shown in FIG. 3, the pin 12 is pulled out to lower the movable member 11 along the upper pipe 5 to a position where it is supported by the upper end of the lower pipe 4. You just have to pull it down.
By doing so, the fixed support point of the pulling force by the upper parallel pulley 13 is lowered, and the occurrence of the forward tilting force of the support column 3 and the working machine 1 is reduced, whereby the pulling force is improved, and even a sheet pile having a large pulling resistance is pulled. Can be pulled out.

[0020]

[Effects of the Invention] As described above, according to the present invention, it is possible to statically and efficiently pull out underground driven objects such as sheet piles, and it is possible to construct with columns, vertical parallel pulleys, clamps and wires. With such a structure, it is possible to pull out underground castings. Also, attach the support to the large-diameter lower pipe and the small-diameter upper pipe.
The movable member on the upper pipe, and change the vertical position
Can be contacted with the upper end surface of the lower pipe at the lower limit position.
It is installed so that it can be pulled out,
If the resistance is high, lower the movable member to lower the lower pipe.
Abutting on the upper end surface, the reaction force at the time of pulling out
The pipe can be used to support the column, which allows pulling force.
And the circle is stable and stable even for underground castings with high pull-out resistance.
It can be pulled out smoothly, and the movable member is attached to the upper pipe.
Since it is installed so that the vertical position can be changed,
When changing the position of the parallel pulley, it is not necessary to expand and contract the column,
It is possible to save the work of raising and lowering the boom of the work machine.
It

[Brief description of drawings]

FIG. 1 is a front view showing a use state of a pulling device according to the present invention.

FIG. 2 is an enlarged front view of the main part of the above.

FIG. 3 is a front view showing a state in which the upper parallel sheave is also set to a lowered position.

FIG. 4 is a cross-sectional plan view taken along arrow IV-IV in FIG.

[Explanation of symbols]

 1 Working Machine 2 Boom 3 Column 11 Movable Member 13 Upper Parallel Pulley 14 Lower Parallel Pulley 15 Clamp 16 Wire 18 Drum

Claims (1)

[Scope of utility model registration request] 1. An arrangement between a boom tip of a working machine and the ground
To the large diameter lower pipe and this lower pipe
It is fitted so that it can move in the axial direction freely, and can be
With a small diameter that can be vertically adjusted by connecting the pins of
It is formed with the upper pipe, and the upper and lower positions
It is possible to change it, and at the lower limit position on the upper surface of the lower pipe
A wire is wound in multiple turns between an upper parallel sheave that is attached to a movable member that abuts and is pivotally fixed to the movable member, and a lower parallel sheave that is located below the upper parallel sheave, and one end of the wire is movable. A device for pulling out an underground driven object, in which the other end is wound around a drum of a working machine, and the lower parallel pulley is provided with a clamp for the underground driven object.