JP2880451B2 - Steel pipe press-in / draw-out device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe press-in / draw-out apparatus for press-fitting or pulling out steel pipes in the horizontal direction at the bottom of a vertical hole in construction and civil engineering work.

[0002]

2. Description of the Related Art Conventionally, as a device for press-fitting or pulling out steel pipes in the horizontal direction at the bottom of an excavated vertical hole, a frame is provided on a base so as to be advanced and retracted in a horizontal direction by a hydraulic cylinder. 2. Description of the Related Art A steel pipe press-fitting / pulling-out device in which a steel pipe fastening portion for integrally moving forward and backward with respect to a frame body is rotatably provided is known. The frame and the steel pipe fastening portion are each provided with a through-hole penetrating in the lateral direction at a central portion.

[0003] When a steel pipe is to be press-fitted laterally from the bottom, for example, the steel pipe is first positioned in each of the through holes, and bolts provided through several places of the wall portion of the steel pipe fastening portion are provided. By tightening from the periphery of the steel pipe, the steel pipe and the steel pipe fastening portion are integrally fixed. Thereafter, the steel pipe is laterally press-fitted by rotating the steel pipe fastening portion together with the steel pipe and moving the frame along the upper surface of the base while removing earth and sand, rocks and the like at the tip of the steel pipe. Since the inside diameter of the vertical hole is limited, the above-described operation is repeated, that is, the steel pipe is sequentially joined to advance the press-fit steel pipe.

[0004]

In the conventional steel pipe press-in / draw-out apparatus described above, since the steel pipe is fixed to the steel pipe tightening portion using bolts at the bottom of the vertical hole and in a narrow space, the operation is difficult. There is a problem that the environment and workability are very poor, and the time required for the fixing is long. Also,
Since the steel pipe is fixed by bolts at several points, the fixing state of the steel pipe becomes unstable, and the more the fixing state is strengthened, the more difficult it becomes to loosen the bolt. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a steel pipe press-in / draw-out apparatus which can improve a work environment and workability and can speed up work.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a frame having a base, a through-hole penetrating in the center in a lateral direction, and a frame arranged on the base so as to be able to advance and retreat in the lateral direction. Body, a driving device for moving the frame body back and forth, rotatable at a fixed position relative to the frame body about the axis parallel to the lateral direction as a center of rotation, and parallel to a plane perpendicular to the axis. Two C-shaped bands provided on both sides of the frame so as to be able to bend while maintaining a state, and a hydraulic pressure which is connected to a hydraulic circuit including a hydraulic pump by being pin-connected between both ends of each of the C-shaped bands. Formed from a cylinder.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 3 show a steel pipe press-in / draw-out device according to the present invention installed on the bottom surface of a vertical hole 1. FIG. As shown in the figure, the present apparatus includes a base 2 fixed on the bottom surface, and a frame 4 disposed on the base 2 so as to be able to advance and retreat in a lateral direction by a driving device, for example, a hydraulic cylinder 3. I have. A through hole 5 extending in the lateral direction is formed in the center of the frame 4. In the example shown here, C-shaped bands 6 and 7 are provided on both sides of the frame 4. The C-shaped bands 6 and 7 are formed to be bendable, and both ends of each of the C-shaped bands 6 and 7 are connected by a hydraulic cylinder 8 via pin members. The C-bands 6 and 7 and the hydraulic cylinders 8 provided in each of them form an opening extending in the lateral direction and continuing to the through hole 5. Further, each of the C-shaped bands 6 and 7 is rotatably attached to the frame 4 at a fixed position with respect to the frame 4 so that the axis parallel to the lateral direction is the center of rotation.
That is, the rotary drive device 9 is built in so as to surround the through hole 5 of the frame body 4, and the rotary portion 10 of the device and a part of the C-shaped bands 6 and 7 are combined, and are integrally formed with the rotary portion 10. The C-shaped bands 6 and 7 can be rotated forward and backward.
The hydraulic cylinder 8 is connected to a hydraulic circuit including a hydraulic pump (not shown) by a known method.

For example, when press-fitting a steel pipe,
With the hydraulic cylinder 8 extended, the C-shaped bands 6 and 7 opened, and the frame 4 moved to the left in FIG. After the steel pipe 11 is located, the C-shaped bands 6 and 7 are closed by contracting the hydraulic cylinder 8, whereby the steel pipe 1 is closed.
Fix 1 Subsequently, the steel pipe 11 is press-fitted while rotating the steel pipe 11 together with the C-shaped bands 6 and 7 while moving the frame 4 forward and removing earth and sand, rocks and the like at the tip of the steel pipe 11. Further, when the press fitting of the steel pipe 11 is continued,
A new steel pipe is fixed by the C-shaped bands 6 and 7 in the same manner as described above, and after joining with the steel pipe 11 press-fitted previously, the above operation is repeated. When pulling out the steel pipe, the operation reverse to the above may be performed. In this case, it is not always necessary to rotate the steel pipe 11.

In the above-described example, the hydraulic cylinder 3 is used as a driving device for moving the frame 4, but the present invention is not limited to the hydraulic cylinder.

[0009]

As is apparent from the above description, according to the present invention, a frame having a base, a through-hole penetrating in the center in the horizontal direction, and being arranged on the base so as to be able to advance and retreat in the horizontal direction is provided. Body, a driving device for moving the frame body back and forth, rotatable at a fixed position relative to the frame body about the axis parallel to the lateral direction as a center of rotation, and parallel to a plane perpendicular to the axis. Two C-shaped bands provided on both sides of the frame so as to be able to bend while maintaining a state, and a hydraulic pressure which is connected to a hydraulic circuit including a hydraulic pump by being pin-connected between both ends of each of the C-shaped bands. It is formed from a cylinder. For this reason, by operating the hydraulic cylinder, the steel pipes can be fixed to the C-shaped band, and the working environment and workability of the steel pipe press-in and pull-out can be improved, and the work can be sped up.

[Brief description of the drawings]

FIG. 1 is a side view of a steel pipe press-in / draw-out device according to the present invention installed on the bottom surface of a vertical hole.

FIG. 2 is a plan view of the steel pipe press-fitting / pulling-out apparatus of FIG. 1 installed on the bottom surface of a vertical hole.

FIG. 3 is a sectional view taken along line III-III of the steel pipe press-in / draw-out apparatus of FIG.

[Explanation of symbols]

 2 Base 3 Hydraulic cylinder 4 Frame 5 Through hole 6, 7 C-shaped band 8 Hydraulic cylinder 11 Steel pipe

Claims (1)

(57) [Claims] 1. A base, a frame provided in a central portion thereof with a through-hole penetrating in the lateral direction, and a frame disposed on the base so as to be able to advance and retreat in the lateral direction; a driving device for moving the frame forward and backward; It is provided on both sides of the frame so as to be rotatable at a fixed position relative to the frame with an axis parallel to the direction as a center of rotation, and to be bendable while maintaining a state parallel to a plane perpendicular to the axis. A steel pipe press-in / pull-out device comprising two C-shaped bands and a hydraulic cylinder which is pin-connected between both ends of each of the C-shaped bands and is provided so as to be connectable to a hydraulic circuit including a hydraulic pump. .