JPH0619636Y2 - Chuck device for press-in / pull-out machine for steel pipe pile - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a chuck device for a steel pipe pile press-in / pull-out machine for press-fitting or withdrawing a cylindrical steel pipe sheet pile or steel pipe pile into the ground. .

(Prior Art) Steel pipes, steel pipe sheet piles, steel pipe piles (hereinafter,
Because of its strong bearing capacity and economy, steel pipe piles can be used not only as permanent structures such as revetment bridge construction, but also as temporary structures or support piles such as mountain retaining and deadline construction that cannot be covered with steel sheet piles. Widely used.

A pile press-fitting and drawing machine for steel pipe piles that press fits these steel pipe piles,
As shown in FIG. 7, a mast 3 is erected on the upper surface of a slide base 2 that slides in a horizontal direction with respect to a base 1 formed at the lower part of the device, and a chuck device 4 for sandwiching a steel pipe pile is used as the mast 3. It is attached so that it can slide in the vertical direction. Then, the chuck device 4 clamps an appropriate position of the pile P and descends to press the pile P into the ground.

On the other hand, the chuck device 4 of the steel pipe pile press-fitting / pulling machine uses the steel pipe pile P.
An appropriate number of chucks, which move forward and backward in the radial direction by a hydraulic cylinder or the like, are fixedly provided on the inner surface of the chuck device on the inner surface of a substantially cylindrical chuck body through which the chuck can be inserted.

Therefore, the steel pipe pile P to be press-fitted is inserted into the chuck body, the chuck device 4 is lowered while being sandwiched by the chuck, and the steel pipe pile P is press-fitted into the ground.

(Problems to be solved by the invention) The steel pipe pile P may be linearly continuously press-fitted, but as shown in FIG. 8, it may be appropriately curved according to the working conditions such as topography and water depth. Often pressed in. Further, since this steel pipe pile P is normally press-fitted continuously with no gap between the adjacent steel pipe piles P, the side surface of the steel pipe pile P is securely connected to the adjacent steel pipe piles P to ensure strength. Section 5 is provided in order to maintain the water resistance and to obtain a water blocking effect.

This section 5 is a male section 5 for one steel pipe pile P.
a and a female section 5b are provided, and the male section 5a and the female section 5b of the steel pipe piles P adjacent to each other are detachably combined. When the steel pipe pile P is continuously driven in as described above,
The attachment positions of the male section 5a and the female section 5b must be positions suitable for connection with the adjacent steel pipe piles P.

That is, as shown in FIG. 8, since the steel pipe piles P1 and P2 and P10 and P11 are connected substantially linearly,
Male section 5a and female section 5b are approximately 180 °
It is provided at the position.

However, since the steel pipe piles P3 and P4 are not linear, the male section 5a and the female section 5b of the steel pipe pile P3 are almost one.
It is provided at a position of 20 °. Further, in the steel pipe pile P9, the male section 5a and the female section 5b are provided at positions of approximately 90 °.

When the steel pipe pile P is clamped by the chuck device 4 of the steel pipe pile press-in / extracter, it must be clamped while avoiding the chuck from contacting the section 5 of the steel pipe pile P. As described above, since the male section 5a and the female section 5b of the section 5 are at various positions, the steel pipe pile P having the section 5 at the same position in the conventional chuck device in which the chuck is fixed in the chuck device is provided. I can only pinch it.

Therefore, when press-fitting the steel pipe piles P in which the sections 5 are arranged at different positions, only the chuck device 4 cannot be replaced due to the structure of the chuck device 4, so the steel pipe pile press-fitting / extracting machine itself should be press-fitted. Section 5 of steel pipe pile P
Had to be replaced with one corresponding to the position.

Since the pile press-in / pull-out machine cannot be carried manually, it must be replaced with a crane, etc., and this replacement work is complicated and time-consuming, and the cost of construction is increased due to the use of a crane or the like. There was a problem that it would end up.

Therefore, an object of the present invention is to provide a chuck device for a steel pipe pile press-in / pull-out machine, which makes it possible to clamp a steel pipe pile having sections at various positions without replacing the steel pipe pile press-in / pull-out machine itself. .

(Means for Solving the Problems) In order to achieve the above object, the chuck device of the steel pipe pile press-fitting / extracting machine of the present invention has a plurality of chucks for sandwiching steel pipe piles on the inner surface of the chuck portion through which the steel pipe piles are inserted. The chuck is provided at a position where it does not abut the section of the steel pipe pile to be clamped,
It is characterized in that it is configured to be movable in the circumferential direction along the inner surface of the chuck portion.

(Operation) Corresponding to the position where the section of the steel pipe pile is provided, the chuck is moved in the circumferential direction with respect to the chuck portion, and the chuck is arranged at a position where it does not contact the section. In this state, a fluid pressure cylinder or the like is operated to clamp the steel pipe pile by the chuck.

(Embodiment) Hereinafter, a chuck device of a steel pipe pile press-fitting / extracting machine of the present invention will be described based on an illustrated embodiment.

FIG. 1 is a plan view of a chuck device 10 of the present invention.
In the chuck device 10, a semicircular first chuck portion 12 is formed at a front end portion of a chuck arm 11, and a cylinder 13 is attached to a tip side portion of the first chuck portion 12.
The piston 14 of the cylinder 13 is the chuck arm 11
Is directed backwards along.

In front of the first chuck portion 12, the first chuck portion 1
2 constitutes a second chuck portion 15 that forms a substantially cylindrical shape, and the side portion of the second chuck portion 15 extends rearward along the chuck arm 11 and is fixed to the tip of the piston 14. There is.

On the inner surfaces of the first chuck portion 12 and the second chuck portion 15,
As shown in FIG. 1, four chucks 16 are provided. As shown in FIG. 3, the chuck 16 has a trapezoidal cross-section groove 17 formed on the inner surface of each of the first chuck portion 12 and the second chuck portion 15, and a trapezoidal cross-section formed at the end portion of the chuck 16. The projections 18 are fitted and provided, and the chuck 16 is slidable in the circumferential direction along the inner surface of each of the first chuck portion 12 and the second chuck portion 15. In addition, the surface of the chuck 16 is formed with appropriate teeth so as to increase the friction with the steel pipe pile P.

In the figure, P is a steel pipe pile, and a round section 19 is formed over the entire length of the surface of the steel pipe pile P.

Next, the operation of the present embodiment configured as described above will be described.

When the steel pipe pile P is inserted between the first chuck portion 12 and the second chuck portion 15 and the piston 14 of the cylinder 13 is retracted by fluid pressure such as hydraulic pressure, the chuck portion 12,
The tip of the chuck 16 formed on the inner peripheral surface of 15 abuts against the steel pipe pile P and clamps it. In this state, this steel pipe pile P
Press into the ground.

In this case, the chuck 16 is moved if the chuck 16 may come into contact with the section 19. That is, in the steel pipe pile P shown in FIG. 1, the section 19 is attached at a position of 180 °, and the chuck 16 is arranged corresponding to this section position.
As shown in the figure, when the section 19 is at a position other than 180 °, the chuck 16 is moved to the first position as shown in the figure.
The chuck part 12 and the second chuck part 15 are appropriately moved so as to be displaced from the position where the chuck 16 contacts the section 19 of the steel pipe pile P, and then the cylinder 1
Activate 3.

Further, FIG. 5 shows an embodiment composed of two chucks 26, and each chuck 26 is formed with a notch 20 for accommodating the section 19. When sandwiching the steel pipe pile P, the chuck 26 is slid so that the cutout portion 20 matches the position of the section 19.

In this embodiment, the round section 19 has been described, but the same chuck device 10 can be used even if the male section 5a and the female section 5b are combined as shown in FIG.

(Effect of the Invention) As described above, according to the chuck device of the steel pipe pile press-fitting / extracting machine of the present invention, when the steel pipe pile is press-fitted, the chuck can be moved according to the position of the section. Can be used for steel pipe piles with sections at various positions. Since the work of moving the chuck can be performed more easily than the work of exchanging the steel pipe pile press-fitting / pulling machine itself, the working time can be shortened and the construction cost can be reduced. Therefore, when press-fitting steel pipe piles, it is possible to easily press-fit in a curved shape, so that it is possible to connect the steel pipe piles to suit the conditions such as the flow path of a river, the hardness of the ground or other work sites, and work efficiency. Improve.

[Brief description of drawings]

1 is a partial sectional plan view of a chuck device, FIG. 2 is a front view of the same, and FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a cross-sectional view of the chuck device, showing a case where a steel pipe pile having a section other than 180 ° is clamped, and FIG. 5 is a cross-sectional view showing another embodiment of the chuck, wherein the section is other than 180 °. 6 shows a case where the steel pipe pile at the position is clamped, FIG. 6 is a perspective view of the chuck device, FIG. It is a top view shown. 10 ... Chuck device, 12 ... First chuck part 13 ... Cylinder, 14 ... Piston 15 ... Second chuck part, 16 ... Chuck 17 ... Groove, 18 ... Projection 19 ... Section

Claims (1)

[Scope of utility model registration request] 1. A chuck for sandwiching a plurality of steel pipe piles is provided on the inner surface of a chuck portion through which a steel pipe pile is inserted, and the chucks are provided along the inner surface of the chuck portion at a position where they do not contact the sections of the steel pipe pile to be sandwiched. A chuck device for a steel pipe pile press-fitting / extracting machine, which is configured to be movable in the circumferential direction.