JPH089865B2 - Clamping mechanism for steel pipe piles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe pile clamping device for a steel pipe pile or the like for performing work while traveling by itself on a pile of steel pipe piles and steel pipe sheet piles that are continuously cast.

[0002]

2. Description of the Related Art A conventional clamp mechanism for a steel pipe pile or the like comprises a pair of opposed clamps and an open / close cylinder for opening and closing the clamps. When sandwiching a steel pipe pile or a steel pipe sheet pile by this conventional clamp mechanism for steel pipe piles, it is common to move each clamp in a direction perpendicular to the pile row and press and grasp both upper ends of the steel pipe pile. Further, the steel pipe pile and the like are designed to have sufficient strength, but since the wall thickness is thin, the outer shape may be deformed when the force is concentrated on a specific place.

[0003]

In the conventional clamp mechanism for steel pipe piles and the like, since the steel pipe piles and the like are pressed and gripped from two places on the left and right sides with a strong force, the upper portions of the steel pipe piles and the like may be deformed. If the steel pipe pile is deformed, it may fall outside the allowable dimension range of construction accuracy, which may cause a construction problem. On the other hand, if the force of pushing and gripping the steel pipe pile or the like is weak, a reliable supporting force cannot be obtained, and the work on the pile cannot be safely performed. The present invention has been devised to solve such problems,
It is an object of the present invention to provide a steel pipe anti-clamping mechanism that can securely clamp a steel pipe pile or the like without deforming it.

[0004]

In order to achieve the above-mentioned object, the clamp mechanism for steel pipe piles and the like of the present invention is provided with a deformation preventing plate that comes into contact with the inner side surface of a steel pipe pile or the like to be clamped, and prevents the deformation. It is characterized in that an elevating means for moving the plate into and out of the steel pipe pile or the like is provided in the frame.

[0005]

The clamp mechanism for steel pipe piles and the like configured as described above clamps the steel pipe piles and the like as follows. The clamp mechanism is placed on the steel pipe pile or the steel pipe sheet pile and the elevating means is operated. The deformation prevention plate descends from the frame into the steel pipe pile or the like to be clamped, and abuts against the inner surface of the steel pipe pile or the like to reinforce. In this reinforced state, the clamp can securely clamp the steel pipe pile or the like from the outside.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional front view of a clamp mechanism for steel pipe piles, etc., which is an embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 4 is a side view of a hydraulic unit equipped with this embodiment. This steel pipe sheet pile clamp mechanism 1 is provided with a pair of clamps 4, 4 opposed to a clamping shaft 3, 3 fixed to both sides of a lower portion of a frame 2, and a deformation prevention plate 5 of a steel pipe sheet pile P is provided inside the frame 2. An elevating means 6 is provided and configured. In the present embodiment, a steel pipe sheet pile clamp mechanism will be described, and a case where steel pipe sheet piles are continuously driven by the clamp mechanism will be described.

That is, the clamps 4 and 4 are made of steel pipe sheet pile P.
The claws 4a, 4a having a semicircular cross section are formed in the lower part of the claws 4a, 4a for sandwiching both sides of the outer peripheral surface thereof. Sliding holes 4b and 4b are formed in the upper portions of the clamps 4 and 4. The above-described clamping shafts 3 and 3 are penetrated through the sliding holes 4b and 4b to clamp along the sliding holes 4b and 4b. 4 and 4 are configured to be slidable in the left-right direction. In addition, each clamp 4, 4
The left and right moving cylinders 7, 7 are stretched between them, and the rod 7
It is possible to move the clamps 4 and 4 in the left and right directions in FIGS. 1 and 2 by extending or retracting a and 7a.

As shown in FIGS. 1 and 3, the deformation preventing plate 5 is formed in a substantially disc shape having the same diameter as the inner diameter of the steel pipe sheet pile P.
The curved surface portion 5a contacts the inner side surface of the steel pipe sheet pile P. In addition, the curved surface portion 5a of the deformation preventing plate 5 is clamped by the clamps 4, 4
The claws 4a and 4a are arranged so as to come to positions corresponding to the claws 4a and 4a.
In this embodiment, the lifting cylinder 6 is used as the lifting means. The deformation preventing plate 5 is fixed to the lower end of the rod 6a, and the upper end of the lifting cylinder 6 is fixed in the frame 2.

In the present embodiment, when various devices such as the hydraulic unit 9 are installed on the piles of the steel pipe sheet piles P, they operate as follows. As shown in FIG. 4, the hydraulic unit 9 has a mechanism 10 for suspending the steel pipe sheet pile P on the upper portion of the frame 2.
And the steel pipe sheet pile clamp mechanisms 1 and 1 at the front and rear ends of the lower portion of the frame 2. First, the left and right moving cylinders 7, 7 are actuated to open the clamps 4, 4 larger than the pile diameter, and the steel pipe sheet pile P is inserted therein. At the same time, the lifting cylinder 6 is operated to lower the deformation preventing plate 5 inside the steel pipe sheet pile P to be held by the clamps 4 and 4 (in the direction of the arrow in FIG. 1). The deformation prevention plate 5 is used for the claws 4 of the clamps 4, 4.
The cylinders 7 and 7 for left and right movement are actuated in a state where the steel pipe sheet pile P is pinched by the claws 4a and 4a by operating the left and right moving cylinders 7 and 7 in a state in which the steel pipe sheet pile P is lowered to the position of approximately the center of the a. At that time, the claws 4a and 4a of the clamps 4 and 4 apply a large load to the steel pipe sheet pile P, but the curved surface portion 5a of the deformation preventing plate 5 contacts the inner surface of the steel pipe sheet pile P held by the claws 4a and 4a. It touches and reinforces. Therefore, the steel pipe sheet pile P is clamped 4
The steel pipe sheet pile P is prevented from being distorted by being sandwiched between the claw 4a and the curved surface portion 5a of the deformation preventing plate 5.

When the hydraulic unit 9 is allowed to travel by itself, the left and right moving cylinders 7, 7 are operated and the clamp 4,
4 is opened again, the rod 6a of the lifting cylinder 6 is retracted, the deformation preventing plate 5 is housed above the frame 2, and the frame 2 is moved forward.

As described above, according to the present embodiment, since the inside of the steel pipe sheet pile P is reinforced by the deformation preventing plate 5, even when the steel pipe sheet pile P is sandwiched from two places on the left and right sides with a strong force, the steel pipe sheet pile P is formed. Is less likely to be deformed. for that reason,
It is well within the allowable deformation range.

The case where the present embodiment is used as the moving clamp mechanism of the hydraulic unit 9 has been described above.
The present invention is not limited to this, and can also be used as a moving clamp mechanism for other overhead working devices.

[0013]

As described above, since the steel pipe sheet pile clamping mechanism of the present invention reinforces the steel pipe sheet pile or the steel pipe pile from the inside corresponding to the outer clamp, there is a possibility that the upper portion of the steel pipe pile or the like may be deformed. Few. Therefore, the steel pipe pile or the like can be firmly clamped from the outside without adjusting the force, and various working devices can be reliably installed on the pile row of the steel pipe pile or the like. Further, after the construction, there is an effect that the construction accuracy of the steel pipe pile or the like is good.

[Brief description of drawings]

FIG. 1 is a sectional front view showing an embodiment of the present invention.

2 is a side view showing an embodiment of the present invention.

FIG. 3 is a plan view of a deformation prevention plate used in the above embodiment.

FIG. 4 is a side view of a hydraulic unit equipped with the present embodiment.

[Explanation of symbols]

 1 Clamping mechanism for steel pipe piles 2 Frame 3 Clamping shaft 4 Clamp 5 Deformation prevention plate 6 Lifting device 7 Left-right movement cylinder P Steel pipe sheet pile

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-94523 (JP, A) Actually opened 50-45005 (JP, U) Actually opened 56- 130037 (JP, U)

Claims (1)

[Claims] 1. A clamp for a steel pipe pile or the like provided with a deformation prevention plate that abuts an inner surface of a steel pipe resistance to be clamped, and elevating means for moving the deformation prevention plate into and out of the steel pipe pile or the like in a frame. mechanism.