JPH0640673Y2 - Connector for rotary press-fitting of steel pipe piles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a rotary press-fitting connector for a steel pipe pile, in which a projecting piece is provided on the inner peripheral surface of the upper end and a spiral projection is provided at the tip.

<Prior art> In recent years, when driving a steel pipe pile into the ground, a so-called noiseless construction method has been adopted in which a screw-type steel pipe pile with a spiral protrusion at the tip is rotationally press-fitted for noise control. There is. At that time, as a suspending connection tool (also called a chucking cap) attached to a rotary drive device such as an auger machine, conventionally, an axial guide for guiding a projecting piece projecting on an upper outer peripheral surface of a steel pipe pile is conventionally used. It is known that the groove and the engagement groove in the circumferential direction are connected to the side wall of the cap.

<Problems to be solved by the invention> However, when connecting the connecting tool having the above structure to the steel pipe pile, it is not possible to confirm the position of the projecting piece of the steel pipe pile, and thus there is a problem that the connection takes time. there were.

As a means for solving such a problem, for example, Jikho Sho 61
-Suspension connectors as disclosed in the publication No. 3956 have been proposed. That is, as shown in detail in FIG. 6, a plurality of guide pieces 55 are arranged so that the inner side is concentrically located on the inner periphery downward from the lower peripheral portion of the board 57 so that the steel pipe pile 51 can be guided.
Are projected at equal intervals, and at the tip of the guide piece 55, projecting pieces 56 projecting horizontally and radially on the outer peripheral wall of the upper end of the steel pipe pile 51.
L-shaped hooks 54 for engaging and locking with are opened in the same direction, through holes 57a are provided in the central portion of the board 57, and are arranged on the upper surface of the board 57 at equal intervals with a predetermined length. The connecting shaft mounting plate 60 is connected via the supporting column 59, and the connecting shaft 58 for connecting to the rotating shaft 61 of the rotary drive device is projectingly provided at the center of the upper surface of the connecting shaft mounting plate 60. It was done.

However, with such a hanging connection,
It is necessary to replace the connector every time the outer diameter of the steel pipe pile is different, and it is necessary to pull out the steel pipe pile when it hits an obstacle in the ground during casting, for example. There was a problem such as being able to rotate the pile in reverse.

An object of the present invention is to provide a rotary press-fitting connector for a steel pipe pile, which is made to solve the above problems.

<Means for Solving the Problems> The present invention is a connector used when press-fitting into the ground while rotating a steel pipe pile having a projecting piece projecting from the inner peripheral surface of the upper end and a spiral projection at the tip. And a first cylindrical member having an outer diameter that is substantially the same as or slightly smaller than the inner diameter of the steel pipe pile, and the outer diameter of the first cylindrical member that is provided on the concentric axis of the first cylindrical member. A second cylindrical member having a smaller outer diameter and a protruding piece horizontally and radially projected on the inner peripheral surface of the upper end of the steel pipe pile can be fitted to the outer peripheral surface of the second cylindrical member. A guide piece in which an L-shaped convex portion and an inverted L-shaped convex portion are formed so as to face each other, and is connected to a rotary shaft of a rotary drive device that is provided so as to project from the upper surface of the first cylindrical member. A connector for rotary press-fitting a steel pipe pile, which comprises a connecting shaft.

A third columnar member having an outer diameter that is substantially the same as or slightly smaller than the inner diameter of the steel pipe pile having a diameter smaller than the diameter of the steel pipe pile provided on the lower surface of the second cylindrical member on the concentric axis; A fourth cylindrical member having an outer diameter smaller than the outer diameter of the third cylindrical member provided on the concentric axis of the third cylindrical member, and an outer peripheral surface of the fourth cylindrical member, The steel pipe pile includes an L-shaped convex portion and a guide piece formed with an inverted L-shaped convex portion that can be fitted with a protruding piece that is horizontally and radially projected on the inner peripheral surface of the upper end. It can be used as a rotary press-fitting connector for steel pipe piles.

<Operation> According to the present invention, since the guide piece having a pair of the L-shaped convex portion and the inverted L-shaped convex portion is provided on the outer peripheral surface of the cylindrical member, the steel pipe is provided between the guide pieces. Since the connector for rotary press-fitting is configured so that the protruding pieces provided on the inner peripheral surface of the pile are fitted together, the steel pipe pile can be press-fitted rotationally, and it can also be reversely rotated and pulled out. it can.

Further, since the rotary press-fitting connector is configured by joining a plurality of columnar members having different outer diameters in a plurality of stages, one rotary press-fitting connector rotationally press-fits a plurality of steel pipe piles having different diameters. be able to.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

[Embodiment 1] FIG. 1 is a side view showing a first embodiment of the present invention.
FIG. 2 is a sectional view taken along line AA.

In the figure, 1 is a steel pipe pile and 2 is a cylindrical member.

The cylindrical member 2 includes a first cylindrical member 2a having an outer diameter D that is substantially the same as or slightly smaller than the inner diameter of the steel pipe pile 1, and an outer peripheral surface having a step h from the outer peripheral surface of the first cylindrical member 2a. And a second cylindrical member 2b on the concentric axis. This step h is determined in accordance with the height of the horizontally and radially protruding projecting pieces 6, 6 symmetrically provided on the inner peripheral surface of the steel pipe pile 1, and accordingly the second cylindrical shape is formed. Outer diameter d of member 2b
Can be decided.

Then, on the outer peripheral surface of the second columnar member 2b, an L-shaped convex portion 3 having a height of which one is h, that is, the same as the outer peripheral surface of the first columnar member 2a, is formed. , The other one is also provided with the inverted L-shaped convex portions 4 having the same height and facing each other at a position separated by a distance of l, and the guide pieces 5, 5 of the projecting pieces 6, 6 are formed on the inner circumference. It is formed symmetrically in the direction. The size of the interval 1 may be determined according to the width dimension of the protruding piece 6.

The L-shaped convex portion 3 and the inverted L-shaped convex portion 4 described above are provided.
The extension lines of the horizontal lines 3a and 4a converge to the central line 0 (see FIG. 2) of the lower half member 2b so as to coincide with the horizontal line of the protruding piece 6. It is a so-called radial line segment.

The L-shaped convex portion 3 and the inverted L-shaped convex portion 4 of these guide pieces 5, 5
May be formed by cutting the cylindrical member 2 in which the first cylindrical member 2a and the second cylindrical member 2b are integrated with a lathe or the like, or a circle having an outer diameter D. A columnar member having an outer diameter d is joined to the columnar member, and an L-shaped member having a height h and an inverted L-shaped member opposed to the columnar member are attached to the outer peripheral surface one by one by, for example, welding. Good.

By coupling the columnar member 2 thus processed to the board body 7 to which the coupling shaft 8 is attached, the rotary press-fitting coupling tool 10 of the present invention is constructed.

This rotary press-fitting connector 10 is joined to the rotary shaft of a rotary drive device (not shown) and inserted into the inner surface of the steel pipe pile, and the guide pieces 5 and 5 are fitted to the protruding pieces 6 and 6 attached to the inner surface. By rotating, it can be press-fitted in rotation. Moreover, the steel pipe pile 1 can be pulled out by rotating in reverse.

In the above embodiment, the guide pieces 5 are described as a pair, but depending on the diameter of the steel pipe pile 1, three or four pieces (two pairs) are symmetrical in the circumferential direction corresponding to the protruding pieces 6. It goes without saying that it can be provided in.

Further, if a tapered cross-shaped guide member is provided on the lower surface of the rotary press-fitting connector 10, the rotary press-fitting connector 10 can be attached to the head of the steel pipe pile 1 very easily. be able to.

[Second Embodiment] FIG. 3 is a side view showing a second embodiment of the present invention.
4 is a sectional view taken along the line BB, and FIG. 5 is a sectional view taken along the line CC.

The second embodiment is a rotary press-fitting connector 10 'configured to accommodate two sizes of steel pipe piles. This rotary press fit for coupling 10 ', as shown in FIG., The first cylindrical member 2a having an outer diameter are D _1, a second cylindrical member 2b whose outer diameter is set to d ₁ And a third cylindrical member 2a ′ having an outer diameter D ₂ (D ₂ <D ₁ ) and a fourth outer member having an outer diameter d ₂ .
The second cylindrical member 2b and the fourth cylindrical member 2b 'are joined together on a concentric shaft.
The guide pieces 5 and 5'provided on b'are illustrated as two pairs. Since these guide pieces 5, 5'are integrally formed with the L-shaped convex portions 3, 3'and the inverted L-shaped convex portions 4, 4 ', sufficient strength can be ensured.

Here, the outer diameter size of the outer diameter D ₂ of D ₁ and the third cylindrical member 2 'of the first cylindrical member 2a is the steel pipe pile 1, symmetrically in the same manner as in Example 1 the inner diameter of Depending on size, for example 49
It may be determined as 0 mmφ and 300 mmφ, and the intervals l ₁ , l ₂ between these guide pieces 5, 5 ′ may be determined in the same manner as in the first embodiment.

By thus constructing the rotary press-fitting connector 10 'in two stages, the steel pipe piles 1 of two sizes can be rotary press-fitted, and of course, can be pulled out.

In this embodiment, the size of the target steel pipe pile 1 is described as two types, but the present invention is not limited to this, and three or more types of cylindrical members 2 having different outer diameters may be combined. It is needless to say that the steel pipe pile 1 of three sizes or more can be accommodated by configuring the above.

<Effect of the Invention> According to the first aspect of the present invention, not only the steel pipe pile can be rotationally press-fitted, but also the steel pipe pile once cast can be reversely rotated and pulled out.

Further, according to the second aspect, it is possible to perform the rotational press-fitting and withdrawing of the steel pipe piles having a plurality of diameters with one rotational press-fitting connector.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 shows a second embodiment of the present invention. FIG. 4 is a side view, FIG. 4 is a sectional view taken along the line BB of FIG. 3, FIG. 5 is a sectional view taken along the line CC of FIG. 3, and FIG. 1,51 …… Steel pipe pile, 2a …… First cylindrical member, 2b …… Second cylindrical member, 2a ′ …… Third cylindrical member, 2b ′ …… Fourth circular member Columnar member, 3 ... L-shaped convex portion, 4 ... Inverted L-shaped convex portion, 5,55 ... Guide piece, 6,56 ... Projecting piece, 7,57 ... Plate body, 8,58 ...... Connecting shaft, 10 ...... Rotating press-fitting connector. 54 …… L-shaped hook 59 …… Supporting pillar 60 …… Connecting shaft mounting plate 61 …… Rotating shaft

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiji Sato 2-3-2 Uchisaiwaicho, Chiyoda-ku, Tokyo (Hibiya Kokusai Building) Kawasaki Steel Co., Ltd. Tokyo Head Office (56) Bibliography Sho 58-29636 ( JP, U) Actual opening 48-77911 (JP, U) Actual opening 57-96236 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. A connecting tool used for press-fitting into the ground while rotating a steel pipe pile (1) having a projecting piece projecting from the inner peripheral surface of the upper end and a spiral projection at the tip of the steel pipe pile. A first cylindrical member (2a) having an outer diameter that is substantially the same as or slightly smaller than the inner diameter of the pile, and smaller than the outer diameter of the first cylindrical member provided on the concentric axis of the first cylindrical member. A second columnar member (2b) having an outer diameter and a protruding piece (6) protruding horizontally and radially on the inner peripheral surface of the upper end of the steel pipe pile on the outer peripheral surface of the second cylindrical member. Possible L-shaped convex part (3)
And a guide piece (5) having an inverted L-shaped convex portion (4) formed to face each other, and a guide shaft (5) connected to a rotary shaft of a rotary drive device protrudingly provided on the upper surface of the first cylindrical member. A connector for rotary press-fitting a steel pipe pile, which comprises a connecting shaft (8). 2. A third pipe having a diameter smaller than that of the steel pipe pile concentrically provided on the lower surface of the second cylindrical member (2b) and having an outer diameter substantially the same as or slightly smaller than the inner diameter of the steel pipe pile.
Cylindrical member (2a ') and a fourth cylindrical member (2b') having an outer diameter smaller than the outer diameter of the third cylindrical member provided on the concentric axis of the third cylindrical member. And this 4th
L which can be fitted to the outer peripheral surface of the columnar member of the present invention with a protruding piece (6) horizontally and radially projected on the inner peripheral surface of the upper end of the steel pipe pile.
The steel pipe pile according to claim 1, wherein the convex portion (3 ') and the inverted L-shaped convex portion (4') are formed so as to face each other and a guide piece (5 '). Rotating press fitting.