JPH0621962Y2 - Clamping device for pile press-in / pull-out machine - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a clamp device for a pile press-in / pull-out machine.
In particular, the present invention relates to a clamp device in which each clamp is independently movable.

(Prior Art) Conventionally, a pile press-fitting / extracting machine has been used to press-fit a steel pile such as a steel sheet pile. This pile press-in / pull-out machine constitutes a chuck for sandwiching a pile in front of a mast erected on a slide base on a base, and a plurality of clamps for sandwiching an existing pile are provided at the bottom of the base. I am configuring.

This clamp is fixed to the lower end of the base, clamps the existing piles, fixes the pile press-in / pull-out machine main body on the pile row, and obtains a reaction force from the existing piles when press-fitting or pulling out the piles. When the pile press-in / pull-out machine self-propelled on the pile row, it was moving forward or backward as the base moved.

(Problems to be solved by the invention) In such a conventional clamp device, since the pitch of each clamp is fixed to the base at a predetermined interval,
It was not possible for each clamp to move independently in the front-back direction.

Therefore, when the steel sheet piles are continuously press-fitted, if the pile widths of the piles are different and the clamping pitches of the clamps are different, the piles cannot be clamped, and therefore the pile press-fitting / extracting machine itself must be replaced.

Since the pile press-in / pull-out machine is a heavy object, it must be replaced using a crane, etc., and this replacement work is complicated and time-consuming, and the use of a crane etc. increases the construction cost. was there.

On the other hand, in the press-fitting / pulling-out machine for steel pipe piles as shown in FIG. 4, the clamp 1 also uses a cylindrical shape in order to adapt to the cylindrical steel pipe pile P.
Since it is a cylindrical shape, these centers must be aligned when gripping the pile, and the interval between the clamps 1 and 1 needs to be accurately determined according to the press-fitting pitch of the steel pipe pile P.

The present invention has been devised in view of such a current situation, and provides a clamp device for a pile press-fitting / extracting machine that can immediately cope with a different pitch of the press-fitting piles and enable a quick press-fitting operation. With the goal.

(Means for Solving Problems) In order to achieve the above-mentioned object, the present invention is a clamp device in which a plurality of clamps are provided in the lower part of the base of a pile press-in / pull-out machine, and is slidably fitted to the lower part of the base. Upper slide mechanism, a cylinder mechanism fixed to the lower end of the base to move the slide mechanism back and forth, a lower slide mechanism slidably fitted to the lower portion of the upper slide mechanism, and the lower slide mechanism to the left and right. A cylinder mechanism fixed to the lower end of the upper slide mechanism for movement is provided, and each clamp is independently movable in the front-rear direction by the upper slide mechanism, and each clamp is independently moved in the left-right direction by the lower slide mechanism. It is characterized in that it is movable.

(Operation) When clamping or gripping the existing piles with the clamps of the pile press-in / pull-out machine, if the pitches of the existing piles are different, each clamp is moved forward and backward by the clamp moving mechanism interposed between the base and the clamps. The clamp is moved, the pitch of the clamp is changed, and the lower slide mechanism at the lower end of the upper slide mechanism is moved in the left-right direction to secure a proper clamped or grasped state of the clamp.

(Example) Next, the Example of this invention is described based on drawing. FIG. 1 is a front sectional view of the clamp device of the present invention, FIG. 2 is a side sectional view of the same, FIG. 3 is a front view of a steel pipe pile press-in / pull-out machine equipped with the clamp device of the present invention, and FIG. It is a figure.

The clamp moving mechanism 2 of this embodiment includes an upper slide mechanism 31 attached to the base 14, a lower slide mechanism 21 fixed to the upper end of the clamp 1, and the slide mechanisms 21 and 31.
And cylinders 24 and 34 for moving.

The upper slide mechanism 31 is attached to the lower end of the base 14.
In order to make the upper slide mechanism 31 movable in the front-rear direction (arrow direction in FIG. 4) with respect to the pile press-fitting / pulling machine 10,
Sliding grooves 32, 32 parallel to the front-rear direction inside the lower end of the base 14.
Is formed, and ridges 42, 42 are formed in the lower part thereof.

On the other hand, on the upper end surface of the upper slide mechanism 31, rails R2, R2 that fit and slide in the sliding grooves 32, 32 are formed, and sliding for fitting the protrusions 42, 42 is performed. Grooves 35, 35 are cut.

Further, in parallel with the sliding groove 32, the upper slide mechanism 31
A recessed groove 33 is formed in the central portion of the above, and a cylinder 34 attached to the lower end of the base 14 is housed in the recessed groove 33.
The cylinder 34 has one end fixed to the base 14 and the other end fixed to the upper slide mechanism 31.

On the lower end surface of the upper slide mechanism 31, rails R1 and R1 slidably fitted in sliding grooves 22, 22 of a lower slide mechanism 21, which will be described later, are formed.

The lower slide mechanism 21 is provided with sliding grooves 22, 22 parallel to the left-right direction inside so that the lower slide mechanism 21 can move in the left-right direction (arrow direction in FIG. 1) with respect to the pile press-fitting and extracting machine 10. Further, a concave groove 23 is cut in the central portion in parallel with the sliding groove 22, and the upper slide mechanism 3 on the base 14 side is formed in the concave groove 23.
A cylinder 24 attached to the lower end of 1 is housed. The cylinder 24 has one end fixed to the upper slide mechanism 31 and the other end fixed to the lower slide mechanism 21.

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

As shown in FIG. 4, by clamping the clamps 1 and 1 at the upper ends of the existing steel pipe piles P, P, the pile press-fitting / extracting machine 10 is fixed on the existing piles to perform the steel pipe pile press-fitting work. The clamp 1 for steel pipe piles used in this embodiment will be briefly described with reference to FIG.

In the clamp 1, a cylindrical pressing portion is divided into two to form a movable grip portion 41 and a fixed grip portion 51 having a substantially crescent-shaped cross section.

The pressing portion includes two fluid pressure cylinders 61, 61 vertically.
Is built in. Recessed portion 41 formed in the movable grip portion 41
a, 41a, cylinders 61, 61 pistons 61b, 6
The end portions of 1b are fitted and fixed, while the pistons 61b, 61 are formed in the concave portions 51a, 51a formed in the fixed grip portion 51.
b is slidably fitted and one end of the rods 61a, 61a of the cylinders 61, 61 is fixed to the inner part of the recesses 51a, 51a.

In use, the cylinders 61, 61 are operated and the rods 61a, 61a are extended to press the movable grip portion 41 against the inner wall surface of the pile P. Further rod 61
a and 61a are extended, the movable gripping part 41 is slightly moved outward (right side in FIG. 6) by the reaction force obtained from the inner wall surface of the pile P, and the clamp 1 is fixed to the steel pipe pile P. (See FIG. 6 (b)). In this state, the steel pipe pile P is securely gripped by the clamp 1.

When removing the clamp 1 from the steel pipe pile P, the gripped state is released by retracting the rods 61a and 61a of the cylinder 61.

In this pile press-fitting work, a new press-fitting steel pipe pile P is chucked 12
It is carried out by holding it and lowering the chuck 12,
Along with this press-fitting work, the pile press-fitting / pulling-out machine 10 also moves on the existing pile row.

Thus, each time the press-fitting / pulling-out machine 10 moves forward or backward, the clamps 1 and 1 under the base 14 must grip a new existing pile. Since these piles P, P are normally press-fitted at equal intervals, the clamps 1, 1 for gripping them may be set in advance at a constant interval, but when the piles P, P have different pile diameters. , Or if the piles have different press-fit pitches, the intervals between the clamps 1 and 1 must be changed.

In that case, the cylinder 34 attached to the lower end of the base 14 is operated, and the rails R2 and R2 are connected to the sliding groove 3 of the base 14.
The clamps 1 and 1 are moved by moving them along 2 and 32 and moving the upper slide mechanism 31 forward or backward.

Therefore, the clamp 1 can be slightly moved back and forth according to the change of the pile pitch, and its center can be always aligned with the center of the steel pipe pile P. Therefore, the clamp 1 is always in close contact with the inner peripheral surface of the steel pipe pile, and a reliable gripping state can be secured.

In particular, as shown in FIG. 5, in the press-fitting operation of the steel pipe pile P, the press-fitting interval of the pile P also changes due to the structural difference between the section portions S, S.

Further, in the case of curve driving as shown in FIG. 5 (a), the interval between the piles P, P changes little by little, so the clamp 1
However, in order to cope with this, it is inevitable to make a fine adjustment of the pitch. However, even in these cases, the clamp moving mechanism 2 of the present embodiment can respond quickly and accurately.

In this embodiment, rails R1 and R1 are provided at the lower end of the upper slide mechanism 31, and the lower slide mechanism 21 can be slid horizontally, that is, the clamp P can be moved horizontally. . Therefore, it can be moved not only forward and backward but also left and right.

Although the above-mentioned embodiment explained the clamp for steel pipe piles, as shown in FIG.
It goes without saying that it can be applied to. In this case as well, the same operational effects as those of the above-described embodiment are produced.

(Effect of the Invention) As described above, according to the present invention, even if the pitch of the press-fitting pile is different, this can be immediately coped with, and the lower slide mechanism is provided at the lower end of the upper slide mechanism to move the lower slide mechanism in the left-right direction. Since it is slidable, it can be moved not only forward and backward, but also left and right, which enables rapid press-fitting work of the piles and improves the efficiency of press-fitting work of steel piles such as steel pipe piles or steel sheet piles.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a front sectional view of a clamping device of the present invention, Fig. 2 is a side sectional view of the same, and Fig. 3 is a steel pipe pile press-fitted with the clamping device of the present invention. Fig. 4 is a front view of the drawing machine, Fig. 4 is a side view of the same, Fig. 5 is a plan view showing a press-fitted state of a steel pipe pile, Fig. 6 is a sectional explanatory view of a clamp for a steel pipe pile, and Fig. 7 is a clamp of the present invention. It is a front view of the pile press-fitting / pulling machine for steel sheet piles equipped with the device. 1 ... Clamp, 2 ... Clamp moving mechanism 14 ... Base, 21 ... Lower cylinder mechanism 31 ... Upper cylinder mechanism, P ... Pile

Claims (3)

[Scope of utility model registration request] 1. A clamp device in which a plurality of clamps are provided in the lower part of the base of a pile press-in / pull-out machine, and an upper slide mechanism slidably fitted to the lower part of the base and a base for moving the slide mechanism back and forth. A cylinder mechanism fixed to the lower end of the table, a lower slide mechanism slidably fitted to the lower part of the upper slide mechanism, and a cylinder mechanism fixed to the lower end of the upper slide mechanism to move the lower slide mechanism to the left and right are provided. A clamp device, wherein each clamp is independently movable in the front-rear direction by the upper slide mechanism, and each clamp is independently movable in the left-right direction by the lower slide mechanism. 2. A clamp device according to claim 1, wherein the clamp is constructed for a steel pipe pile. 3. The clamp device according to claim 1, wherein the clamp is constructed for a steel sheet pile.