JPS6046212B2 - Pile chucking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a chuck that is used in a so-called pile driver that presses piles into or pulls them out of the ground, and that is particularly suitable for use in taking reaction force from piles that have already been press-fitted. The purpose of the king device is to be able to firmly and reliably clamp a pile, and therefore to be able to efficiently perform press-fitting and pulling out of the pile.

In order to achieve the above object, the present invention includes a frame, a pile chuck member supported to be movable up and down in an inclined direction so that the interval between opposing chuck parts can be increased or decreased, and A fluid pressure cylinder device for lifting and lowering the pile chuck member connected to the pile chuck member and the frame, and a fluid supported by the frame and interposed between the frame and the top surface of the pile held by the pile chuck member. The present invention is characterized by comprising a pressure cylinder device.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

1 to 3, 1 is a base, 2 is a hydraulic cylinder installed in an inverted state on a bifurcated protrusion 3 on the front side of the base 1, and each hydraulic cylinder 2 is a U-shaped pile P that is press-fitted. It is supported so that it can be raised and lowered in the left and right directions with respect to the normal line. 4 is a chucking device for pressing in and pulling out piles connected between the lower ends of the tubes of each hydraulic cylinder 2; this chucking device 4 operates a wedge-shaped pile chuck member 6 on the frame 5; It is equipped with a fluid pressure cylinder device (not shown).

Reference numeral 7 denotes a pile chucking device supported on the left and right sides of the front side of the base 1. These chucking devices 7 include a wedge-shaped pile chuck member attached to the frame 8 and a hydraulic cylinder device (both not shown) that operates the pile chuck member. ), the position of which can be adjusted along the guide screw shaft 9.

Reference numeral 10 denotes a chucking device of the present invention, which is supported by the intermediate and rear portions of the base 1 and is used to take reaction force from the press-fitted pile P.

This chucking device 10 is particularly illustrated in FIGS. 4 to 7.
As is clear from the figure, the frame 11 and the pile chuck member 1
2. Fluid pressure cylinder device 1 for operating the pile chuck member 12
3 and a hydraulic cylinder device 14 interposed between the frame 11 and the pile P held by the pile chuck member 12.

In the frame 11, a pair of upper side plates 15 are connected to a connecting plate 16, an outer plate 17 is fixed to each upper side plate 15, and a guide groove 18 is formed in the center of each outer plate 17 in the horizontal direction. A lower side plate 19 is connected to the lower inner protrusion of each upper side plate 15 so as to hang down, and a top plate 20 is fixed around the upper part of each upper side plate 15. A vertically elongated notch groove 21 is formed in the center of each lower side plate 19, and guide members 22 are fixed between the lower side plates 19, located on both sides of this notch groove 21. A guide groove 23 is formed in each guide member 22 to face each other, and each guide groove 23 is inclined so that the distance between the guide grooves 23 gradually widens from the bottom to the top. A base portion of a wedge-shaped pile chuck member 12 is fitted into each guide groove 23 so as to be movable up and down. As each of these pile chuck members 12 moves up and down, the distance between the protruding chuck parts 25 formed on the opposing inner surfaces can be expanded or contracted in parallel. The pile chuck member 12 is made of a material with higher strength than the pile P. A bearing plate 26 is fixed to the inner surface of the top plate 20, and a base portion of a fluid pressure cylinder device, such as an air cylinder device 13, is connected to this bearing plate 26 by a pin 27. An auxiliary member 27 is connected to the tip of the piston rod 13a of the air cylinder device 13,
One end of a connecting screw shaft 28 is connected to this auxiliary member 27. The connecting screw shaft 28 may be located on the same axis as the piston rod 13a as shown in the illustrated example, or may be eccentrically located. The other side of this connecting screw shaft 28 is connected to the pile chuck member 1.
It is connected to 2. Therefore, as the piston grip 13a of the air cylinder device 13 expands and contracts, the pile chuck member 12 can be lowered or raised as described above. A fluid pressure cylinder device, for example, an air cylinder device 14 is inserted into the upper center of the frame 11 in an inverted state.
The base of this air cylinder device 14. A mounting plate 29 fixed to the top plate 20 is attached to the top plate 20 by bolts 30.
The air cylinder device 14 is set so that the tip of the piston rod 14a is located above the notch groove 21 when the piston rod 14a is retracted. As is clear from FIGS. 4 and 5, in the chucking device 10 of the present invention having the above structure, the guide groove 18 of the frame 11 is connected to the guide rail 32 horizontally fixed to the auxiliary plate 31 of the base 1. A protrusion 3 is slidably fitted and connected to the outer plate 17 of the frame 11.
No. 3 screw hole is screwed into a guide screw shaft 35 installed horizontally between the auxiliary plates 34 of the base 1.

Therefore, by rotating the guide screw shaft 35, the chucking device 10 can be moved along the guide rail 32, and the position of the chucking device 10 can be adjusted. Next, the operation of press-fitting the pile P into the ground using the apparatus of the present invention will be described.

The base 1 is suspended by a crane (not shown) onto the pile P that has been press-fitted, and the notch groove 21 of the chucking device 10 is straddled over the bottom of the even-numbered pile P that has been press-fitted to the pile P that is to be press-fitted. let Next, air cylinder device 13 piston rod 13
A is extended, the pile chuck members 12 are lowered, and the bottom of the pile P is clamped by these pile chuck members 12 (see the chain line in FIG. 6). With fluid pressure applied in the direction of extending the piston rod 13a of the air cylinder device 13,
By extending the piston rod 14a of the air cylinder device 14 and pressing the top surface of the pile P with the tip of the piston rod 14a, the frame 11 and the pile chuck member 12 are moved considerably in the vertical direction, and the pile chuck member 12 is chucked. The portion 25 firmly holds the pile P. At the same time, the chucking device 7 clamps the press-fitted pile P adjacent to the pile P to be press-fitted. After that, the pile P is suspended in the chucking device 4 for press-fitting and pulling out, and the pile P is ground by combining the expansion and contraction operation of the hydraulic cylinder 2 and the clamping and releasing operations of the chucking device 4 on the pile P. It can be press-fitted inside. After press-fitting, the piston rods 13a and 14a of the air cylinder devices 13 and 14 of the chucking device 10 are compressed together to raise the pile chuck member 12 and release it from the pile P. At the same time, the chucking device 7 is also released from the pile P. Next, the base 1 is lifted up and moved diagonally forward, and after the movement, the base 1 is hung, and the same operations as described above are repeated to successively press-fit the piles P. Further, by performing the operation opposite to the above, the pile P can be pulled out, and at this time, a reaction force is applied downward to the base 1, but this reaction force is applied to the chucking device 1.
The pile P can be received not only by the pile chuck member 12 of No. 0 but also by the air cylinder device 14, and a reliable clamping state of the pile P can be guaranteed. The pile chucking device 10 of the present invention can also be used as a chucking device 7 that clamps a press-fitted pile P adjacent to a pile P to be press-fitted.

Further, the fluid pressure cylinder device 14 does not need to be fixed to the frame 11. As is clear from the above, according to the present invention,
The pile is clamped by the pile chuck member by the operation of the fluid pressure cylinder device, and the frame and the pile are moved relative to each other in the vertical direction by the operation of another fluid pressure cylinder device, so the anti-chuck member It has advantages such as being able to firmly and reliably hold piles, being particularly suitable for reaction forces, and enabling efficient pile press-in and pull-out operations.

[Brief explanation of drawings]

Figures 1 to 7 show an embodiment of the chucking device of the present invention, and Figures 1 to 3 are plan views and partially cutaway side views of the chucking device supported by a pile driver, respectively. FIG. 4 is an enlarged front view showing the chucking device of the present invention with a portion of the base cut away, and FIG. 5 is an enlarged front view showing the chucking device of the present invention with a portion of the base cut away. Side view, No. 6
The figure shows the chucking device of the present invention, and
FIG. 7 is an enlarged cross-sectional view taken along the line ■--■ of FIG. 6, with the fluid pressure cylinder device for raising and lowering the chucking member omitted. 1...Base, 2...Hydraulic cylinder, 4
...Chucking device for pile press-fitting and extraction, 7...
... Chucking device, 10 ... Chucking device of the present invention, 11 ... Frame, 12
...Pile chucking member, 13, 14...
Air cylinder device, 22... Guide member, 32...
...Guide rail, 35...Guide screw shaft.

Claims (1)

[Claims] 1 A frame, a pile chuck member supported movably up and down in an inclination direction so that the interval between opposing chuck parts can be expanded or reduced with respect to the frame, and a pile chuck member connected to the frame. and a hydraulic cylinder device supported by a frame and interposed between the frame and the top surface of the pile held by the pile chuck member. Features a pile chucking device.