JP2721144B2 - 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 the press-fitting of large-diameter steel pipe piles, concrete piles, etc. in foundation work for construction and civil engineering.
The present invention relates to a steel pipe press-in / draw-out apparatus used for drawing.

[0002]

2. Description of the Related Art Conventionally, as a device for press-fitting and pulling out large-diameter steel pipe piles, concrete piles, and the like, a steel pipe press-fitting pulling-out device shown in FIGS.
Publication). This steel pipe press-in and pull-out device is composed of a base 11,
It is composed of a frame body 12, a lifting / lowering means 13, a fastening means 14, and a rotation drive mechanism 15. The base 11 and the frame 12 have a circular opening 1 through which the steel pipe P passes through the center.
6 and 17, which are non-rotating parts. Lifting means 13
The guide posts 18 are interposed between the base 11 and the frame 12, and are erected at, for example, two places on both sides of the base 11.
4 on the base 11 so as to raise and lower the frame 12 along
It is provided in two places.

[0003] The fastening means 14 is provided with an opening 17 of the frame 12.
The frame 12 is provided so as to be rotatable about an axis parallel to the vertical direction of the frame 12 while maintaining a state parallel to the plane defined by the circle. More specifically, the fastening means 14
Is a cylindrical frame 21 rotatably supported in the opening 17.
And a C-shaped band 22 for tightening steel pipes disposed inside this.
And a tightening hydraulic cylinder 23 for expanding and contracting the distance between the free ends of the C-shaped band 22, a hydraulic pump 24 for driving the hydraulic cylinder 23, and a drive mechanism for the hydraulic pump 24. This C-shaped band 22 is plural,
In the illustrated example, three steel arc-shaped divided pieces are formed by pin connection so as to be rotatable relative to each other, and the central divided piece is fixed to the cylindrical frame 21. The free end and the hydraulic cylinder 23 are pin-connected.

In addition, the driven gear 25 as a driving mechanism is provided on the side of the cylindrical frame 21 which is a rotating part, and is driven by a frame 12 which is a non-rotating part.
A drive gear 26 and a hydraulic motor 27 are provided on the side. The driven gear 25 is mounted on the input shaft of the hydraulic pump 24, and the drive gear 26 is mounted on the output shaft of a hydraulic motor 27. The hydraulic motor 27 is slidably supported by a guide rod 28 provided in the lateral direction toward the cylindrical frame 21, and is made to move forward and backward by a hydraulic cylinder (not shown). The drive gear 26 meshes with the driven gear 25 by moving the hydraulic motor 27 forward, and the drive gear 26 can be separated from the driven gear 25 by moving the hydraulic motor 27 backward.

[0005] The rotary drive mechanism 15 is provided on the outer peripheral portion of the cylindrical frame 21 and is rotatable integrally with the tightening means 14 including the cylindrical frame 21 and about the shaft.
And a hydraulic motor 33 in which a small gear 32 which is a driving gear meshing with the large gear 31 is attached to the output shaft. Specifically, the tightening means 14 is rotated by the rotary drive mechanism 15 by the hydraulic motor 33 via the small gear 32 and the large gear 31. Then, when the fastening means 14 is in a stopped state and the driven gear 25 is at a fixed position, the driving gear 26 is meshed with the driven gear 25 as described above, and the driven gear 25 is rotated forward and reverse, as described above. The input shaft of the hydraulic pump 24 is rotated forward and reverse, and the C-shaped band 22 can be opened and closed. On the other hand, when rotating the tightening means 14, the hydraulic motor 2
Along with 7, the drive gear 26 is retracted and separated from the driven gear 25.

In this device, the opening 1
6 and 17, the steel pipe P is tightened by the C-shaped band 22, and the frame 12 is lowered or raised, and the steel pipe P
Then, the C-band 22 is opened to release the tightening of the steel pipe P, the frame 12 is raised or lowered, and the steel pipe P is tightened by the C-band 22. Is repeated to press-fit or pull out the steel pipe P one pitch at a time. Further, at the time of press-fitting the steel pipe P, the steel pipe P can be press-fitted while being rotated together with the fastening means 14.

[0007]

In the case of the above-mentioned device, the opening and closing of the C-shaped band 22 does not depend on an external hydraulic pump.
You can do it. However, in order to perform this opening and closing, it is necessary to stop the rotation of the fastening means 14 and to position the driven gear 25 so as to face the driving gear 26 each time. For this reason, not only the workability of the device is poor, but also a mechanism for positioning the driven gear 25 is required, which causes a problem that the device becomes complicated. An object of the present invention is to eliminate such a conventional problem, and an object of the present invention is to provide a steel pipe press-in / draw-out apparatus capable of improving workability and simplifying the apparatus.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a base having an opening through which steel pipes penetrate, a plurality of elevating means standing upright on the upper surface of the base around the opening, and A frame body which is a non-rotating part which is raised and lowered by the lifting means, and which is formed to be freely bendable and can be raised and lowered integrally with the frame body, and centered on an axis which is parallel to the vertical direction of the frame body passing through the opening. A fastening means comprising a steel pipe fastening C-shaped band rotatably supported, a hydraulic cylinder interposed between both free ends of the C-shaped band, and extending and contracting the distance between the free ends; and the fastening means. In a steel pipe press-fitting / pulling-out apparatus provided with a rotation drive mechanism for rotating the shaft forward and backward around the shaft, a large gear is provided around the tightening means so as to be rotatable relative thereto and about the shaft. On the other hand A drive gear attached to the output shaft of the motor arranged on the frame body and a driven gear attached to the input shaft of the hydraulic pump, which is a drive unit of the hydraulic cylinder and arranged on the tightening means, mesh with the large gear. Formed.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 3 show a steel pipe press-in / draw-out apparatus according to the present invention, and are substantially the same as those shown in FIGS. Are denoted by the same reference numerals and description thereof is omitted. The drive mechanism in the present device is configured by combining a drive gear 2 attached to an output shaft of a hydraulic motor 1 and a driven gear 4 attached to an input shaft of a hydraulic pump 3 for driving a hydraulic cylinder 23 with an outer peripheral portion of a cylindrical frame 21. In addition, it is formed so as to mesh with a large gear 5 provided rotatably about the axis parallel to the vertical direction of the frame body 12 and relative to the cylindrical frame 21. Here, the hydraulic motor 1 is arranged on the side of the frame body 12 which is a non-rotating part, and the hydraulic pump 3 is arranged on the side of the cylindrical frame 21 which is a rotating part. Regardless of whether the fastening means 14 is rotating or stopped, the input shaft of the hydraulic pump 3 is rotated forward and reverse by the hydraulic motor 1 via the driving gear 2, the large gear 5, and the driven gear 4, C-shaped band 22
Can be opened and closed.

[0010]

As is apparent from the above description, according to the present invention, a base having an opening through which steel pipes penetrate, a plurality of elevating means standing on the upper surface of the base around the opening, and A frame body which is a non-rotating part which is raised and lowered by the lifting means, and which is formed to be freely bendable and can be raised and lowered integrally with the frame body, and centered on an axis which is parallel to the vertical direction of the frame body passing through the opening. A fastening means comprising a steel pipe fastening C-shaped band rotatably supported, a hydraulic cylinder interposed between both free ends of the C-shaped band, and extending and contracting the distance between the free ends; and the fastening means. In a steel pipe press-fitting / pulling-out apparatus provided with a rotation drive mechanism for rotating the shaft forward and backward around the shaft, a large gear is provided around the tightening means so as to be rotatable relative thereto and about the shaft. On the other hand, A drive gear attached to an output shaft of a motor disposed on a body, and a driven portion of the drive unit of the hydraulic cylinder, the driven gear attached to an input shaft of a hydraulic pump disposed in the tightening means, mesh with the large gear. It is formed.

Therefore, irrespective of whether the fastening means is rotating or stopped, the input shaft of the hydraulic pump for driving the hydraulic cylinder is rotated forward and reverse by the motor.
The C-shaped band can be opened and closed, and there is no need to position and stop the tightening means. As a result, it is possible to improve the workability and simplify the device.

[Brief description of the drawings]

FIG. 1 is a partially broken plan view of a steel pipe press-in / draw-out apparatus according to the present invention.

FIG. 2 is an enlarged sectional view taken along the line II-II of FIG.

FIG. 3 is a partially broken side view of the device shown in FIG. 1;

FIG. 4 is a partially broken plan view of a conventional steel pipe press-in / draw-out apparatus.

FIG. 5 is an enlarged sectional view taken along line VV of FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Hydraulic motor 2 Drive gear 3 Hydraulic pump 4 Follower gear 5 Large gear 11 Base 12 Frame 13 Elevating means 14 Tightening means 15 Rotation drive mechanism 16 Opening 22 C-shaped band 23 Hydraulic cylinder

Claims (1)

(57) [Claims] 1. A base having an opening through which steel pipes penetrate, a plurality of elevating means provided on an upper surface of the base around the opening, and a frame which is a non-rotating part raised and lowered by the elevating means; A C-shaped band for fastening steel pipes, which is formed to be bendable and is rotatably supported on an axis parallel to an ascending and descending direction of the frame so as to be able to ascend and descend integrally with the frame and through the opening; Tightening means interposed between the two free ends of the C-shaped band and provided with a hydraulic cylinder for expanding and contracting the distance between the two free ends, and a rotary drive mechanism for rotating the tightening means forward and reverse around the axis. In the steel pipe press-in / draw-out apparatus, a large gear is provided around the tightening means and rotatable relative to the tightening means and about the shaft, and is attached to an output shaft of a motor arranged in the frame. Drive gear and A press-fitting / pulling-out device for a steel pipe, wherein the driving portion of the hydraulic cylinder is formed by meshing the driven gear mounted on an input shaft of a hydraulic pump arranged in the fastening means with the large gear.