JP2958299B1 - Fixing device for steel pipe press-in / draw-out device - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To facilitate positioning of a steel pipe press-fitting / pulling-out device and to surely and easily rotate the above-mentioned device in a reverse direction due to a reaction when rotating a steel pipe even when a space available at a construction site is narrow. Provided is a fixing device for a steel pipe press-in / draw-out device, which can be prevented from coming off. A plate (11) having a through hole (14) at the center thereof for passing a steel pipe (S) through which the steel pipe (S) is to be placed, and a steel pipe press-fitting / pulling-out device (X) projecting above the plate (11) A plurality of guide portions 12 for guiding the base portion B of the apparatus to a fixed position on the plate 11 and a portion of the plate 1 partially buried in the ground and exposed to the ground surface.
The fixing device 1 is formed by the rotation preventing portions 13 made of the long members 13a, 13a facing each other and abutting on the two opposite sides of the plate 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for a steel pipe press-in and pull-out device used for press-in and pull-out of steel pipes such as large-diameter steel pipe piles and concrete piles in construction and civil engineering work.

[0002]

2. Description of the Related Art Conventionally, a steel pipe press-in / draw-out apparatus is well known, and is used in construction and civil engineering work, for example, for press-fitting a steel pipe into the ground. Normally, when this steel pipe is press-fitted, the steel pipe is passed through a C-shaped band that is opened and closed by a hydraulic cylinder, and the outer peripheral portion of the steel pipe is tightened by a C-shaped band at an ascending position. The C-band is opened at its lower limit, and only the C-band is raised, and the same operation is repeated.

[0003]

In the conventional steel pipe press-in / draw-out apparatus described above, first, it is necessary to position the apparatus in order to press-fit the steel pipe into a predetermined position as shown in the design drawing. However, since the device is large and has a large weight, there is a problem that it takes a lot of trouble and time for this positioning.

When rotating the steel pipe for press-fitting the steel pipe, it is necessary to take measures to prevent the apparatus from rotating in the opposite direction due to the reaction. If the construction site is large and the space around the device can be freely used, measures to prevent the device from rotating in the opposite direction can be taken relatively easily. On the other hand, for example, when performing foundation work in the center of a road with heavy traffic, there is a problem that it is difficult to secure a necessary space even if an attempt is made to install means to prevent the device from rotating in the reverse direction. is there. SUMMARY OF THE INVENTION The present invention has been made to eliminate the conventional problems, and facilitates positioning of a steel pipe press-fitting / pulling-out apparatus and, even when a space available at a construction site is narrow, rotating a steel pipe. It is an object of the present invention to provide a fixing device for a steel pipe press-in / draw-out device capable of reliably and easily preventing the rotation of the device in the reverse direction due to the reaction of the device.

[0005]

In order to solve the above-mentioned problems, a first invention has a through hole through which steel pipes are passed in a central portion,
A plate placed in a fixed position on a paved ground, and a plate protrudingly provided on the plate, and when placing a steel pipe press-in / draw-out device on the plate, a base portion of the device is placed on the plate. A plurality of guide portions for guiding to a fixed position, and a long rectangular member partially buried in the ground, a portion exposed on the ground surface abutting on two opposing sides of the plate, and disposed at an opposing position to sandwich the plate And a rotation blocking part made of

According to a second aspect of the present invention, there is provided a through hole for passing a steel pipe in a center portion, wherein the through hole is in contact with at least two opposing surfaces inside a recess formed at a predetermined position on the paved ground. A plate to be placed on the ground in the recess, and a steel pipe press-fitting / pulling-out device protruding from the plate and being placed on the plate. And a plurality of guide portions leading to the same.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show a state in which the fixing device 1 according to the first invention is applied to a steel pipe press-in / draw-out device X installed for pile driving work on a road paved with asphalt A. The steel pipe press-in / pull-out apparatus X has a base portion B having a through hole at the center for passing steel pipes, and four hydraulic cylinders C having a through hole similar to the above at the center and standing on the base portion B. Frame D which is raised and lowered by the above, and a bendable C-shaped band E which is rotatably supported on the vertical frame D so as to be rotatable about an axis perpendicular thereto.
A hydraulic cylinder F interposed between both free ends of the C-shaped band E for opening and closing the C-shaped band E, and a rotation drive unit (not shown) for rotating the C-shaped band E.

On the other hand, the fixing device 1 comprises a plate 11, a plurality of guide portions 12, and a rotation preventing portion 13. In the illustrated example, the plate 11 is rectangular, has a through hole 14 for passing steel pipes in the center, and is placed at a fixed position on the ground. The guide portions 12 are protruded at a total of six places on the plate 11 along each side of the plate 11. When the steel pipe press-in / pull-out device X is mounted on the plate 11, the guide portion 12 guides the base portion B of the steel pipe press-in / pull-out device X to a fixed position on the plate 11. The rotation preventing portion 13 is composed of two opposing elongated rectangular members 13a, 13a that are parallel to each other. Each of the long members 13a is partially buried in the ground, in the illustrated example, is buried in a layer of asphalt A, and a portion exposed on the ground surface abuts on two opposite sides of the plate 11, and the two long members 13a, 13
The plate 11 is sandwiched by a.

When the steel pipe S is pressed into the ground by the steel pipe press-in / pull-out device X, the steel pipe S is set in the steel pipe press-in / pull-out device X through each of the through holes and then moved to the ascending position. The outer periphery of the steel pipe S is tightened by the shape band E,
The C-band E is lowered to the lower limit while rotating, and then the C-band E is raised. Thereafter, the same operation as described above is repeated. When the steel pipe S is rotated by the C-shaped band E, the steel pipe press-fitting / pulling-out apparatus X receives a force for rotating the steel pipe S in the opposite direction as a reaction. However, the steel pipe press-in / pull-out device X is fixed on the plate 11 via the guide portion 12 with respect to rotation about the vertical axis, and the plate 11 is fixed to the long square material 13 fixed to the ground.
Since it is fixed while being sandwiched between a and 13a, the rotation of the steel pipe press-in / pull-out apparatus X is prevented.

As described above, the fixing device 1 is designed to prevent the steel pipe press-fitting / pulling-out device X from rotating in the opposite direction by the force received as a reaction from the steel pipes. The blocking unit 13 is used for blocking, and can be used even in a place where available space is limited. When a recess is formed in the ground for installing the rotation preventing portion 13, the plate 11 can be used as a ruler, and the position of the recess can be easily determined. Further, when the plate 11 is placed at a fixed position, the steel pipe press-fitting / pulling-out device X is guided to the fixed position by the guide portion 12 protruding thereon, so that the setting of the steel pipes press-fitting / pulling-out device X can be performed easily and quickly.

FIGS. 3 and 4 show a fixing device 3 according to the second invention.
Is applied to a steel pipe press-in / draw-out apparatus X installed for piling work on a road paved with asphalt A, as in the case of the first invention, and a part common to FIGS. Are assigned the same reference numerals and description thereof is omitted. The fixing device 3 includes a plate 31 and a guide portion 32. The plate 31 has a through hole 33 in the center thereof for passing steel pipes, and a recess 3 formed at a fixed position on the ground.
4 is placed on the ground in the recess 34 in a state of contacting at least two opposing surfaces, in the illustrated example, respective inner peripheral surfaces. Then, the plate 31 is formed by the recess 34.
Is fixed, is set at a fixed position via the guide portion 32, and is prevented from rotating.
When forming the recess 34, each side of the plate 31 is used as a ruler,
The concave portion 34 having a size corresponding to the size can be easily formed.

[0012]

As is apparent from the above description, according to the first invention, there is provided a plate having a through-hole for passing steel pipes in the center thereof and being placed at a fixed position on the ground, When a steel pipe press-fitting / pulling device is mounted on this plate, a plurality of guide portions for guiding the base portion of the device to a fixed position on the plate are partially buried in the ground,
A portion exposed to the ground surface is in contact with two opposing sides of the plate, and is formed of a rotation preventing portion made of a long rectangular bar disposed at an opposing position to sandwich the plate.

[0013] Therefore, it is possible to prevent the steel pipe press-fitting / pulling-out device from rotating in the opposite direction due to the force received as a reaction from the steel pipes, and the present invention can be applied to a place where available space is limited. Can be applied. Further, the plate can be used as a ruler when forming a recess for installing the rotation preventing portion, and the position of the recess can be easily determined. Further, there is an effect that the setting of the steel pipe press-fitting / pulling-out device can be easily and quickly performed by the guide portion projecting from the plate.

According to the second aspect of the present invention, there is provided a through-hole for passing steel pipes in the center, and at least two opposing surfaces inside a recess formed at a fixed position on the ground are provided. A plate placed on the ground in the recess, and a plate protrudingly provided on the plate, and when placing a steel pipe press-in / draw-out device on the plate, the base portion of the device is put in a fixed position on the plate. It is formed from a plurality of guide portions for guiding. For this reason, the same effect as the effect according to the first invention is obtained.

[Brief description of the drawings]

FIG. 1 is a view showing a use state of a fixing device for a steel pipe press-in / draw-out device according to a first invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a view showing a use state of a fixing device for a steel pipe press-in / draw-out device according to a second invention.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

[Explanation of symbols]

 1, 3 fixing device 11 plate 11 12 guide portion 13 rotation preventing portion 13a long rectangular member 14 through hole 31 plate 32 guide portion 33 through hole 34 recess X steel pipe press-in / draw-out device S steel pipe A asphalt B base C hydraulic cylinder D Elevating frame E C type band F Hydraulic cylinder

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) E02D 11/00 E02D 7/00 E02D 7/20 E02D 7/22 E21B 7/20

Claims (2)

(57) [Claims] 1. A plate having a through-hole for passing steel pipes at a central portion thereof, and a plate placed at a fixed position on a paved ground, and a projecting projection provided on the plate. When mounting the device, a plurality of guide portions for guiding the base portion of the device to a fixed position on the plate, and two portions, which are partially buried in the ground and exposed on the ground surface, are opposed to each other on the plate. A press-fitting / pulling-out device for steel pipes, wherein the fixing device is formed from a rotation preventing portion made of a long rectangular member disposed at an opposing position for holding the plate. 2. A recess having a through hole for passing steel pipes at a central portion thereof, and abutting at least two opposing surfaces inside a recess formed at a predetermined position on the paved ground. A plate mounted on the ground, and a plurality of guides projecting from the plate and guiding a base portion of the device to a fixed position on the plate when the steel pipe press-in / draw-out device is mounted on the plate. And a fixing device for a steel pipe press-fitting / pulling-out device.