JP2515414Y2 - Pile press-in / pull-out machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pile press-fitting / pulling machine that presses a pile by raising and lowering an elevating body along a mast while being placed on an existing pile.

(Prior Art) In a conventional pile press-in / pull-out machine, an elevating body is slidably attached to a guide part in front of a mast via a main cylinder, and a chuck for holding a press-fitting pile is rotatably attached to the elevating body. ing.

The press-fitting of the pile is performed by holding the press-fitting pile with a chuck and operating the main cylinder to vertically move the chuck together with the lifting body.

(Problems to be Solved by the Invention) The chuck of this conventional pile press-in / pull-out machine only rotates with respect to the lifting body and cannot be raised or lowered without operating the main cylinder.

However, when press-fitting a pile such as steel sheet pile with a press-fitting and extracting machine,
The frictional resistance generated on the peripheral surface of the press-fit pile may increase. In such a case, the press-fitting speed is significantly reduced only by the press-fitting by the main cylinder. In hard ground, etc., the tip resistance of the pile was so great that it could not be press-fitted.

The present invention has been made in view of the above circumstances, and a pile press-fitting / extracting machine that reduces frictional resistance on the peripheral surface of the press-fitting pile and facilitates press-fitting into hard ground by providing vertical chucking means for the chuck as a sub-cylinder. The purpose is to provide.

(Means for Solving the Problems) In order to achieve the above object, the present invention attaches a clamp for sandwiching an existing pile to the lower surface of a saddle, and vertically installs a mast on a slide base that is slidable back and forth with respect to the saddle. Then, a ring is rotatably attached to an elevating body provided at the front end of the mast, the chuck is fitted in the ring so as to be vertically vibrating, and the rotation of the ring can be transmitted to the chuck by a key and a key groove. A vertical vibration means is provided in the chuck,
A chuck is attached to the ring through the vertical vibration means.

(Operation) An existing pile is clamped by a clamp and a pile press-in / pull-out machine is installed on the pile row. After that, hold the press-fitting pile with a chuck, connect it to the existing pile at the tip, and press-fit it into the ground.

During press-fitting or when press-fitting is stopped, the vertical vibrating means of the chuck is activated to move the chuck up and down at high speed to impact the ground from the tip of the press-fitting pile. Further, by appropriately moving the chuck up and down, the frictional resistance of the peripheral surface of the press-fitting pile is reduced to promote press-fitting.

(Embodiment) FIG. 1 is a front view of this embodiment, and FIG. 2 is a side view of the same. The pile press-in / pull-out machine 1 is a clamp 2 that holds an existing pile P1.
Is attached to the bottom of the saddle 3 and the saddle 3 is attached to the slide base 4
It is provided so that it can slide back and forth. A mast 5 is erected on the slide base 4, and an elevating body 7 is slidably mounted in front of and behind the mast 5 via a fluid pressure cylinder (main cylinder) 6. A ring 8 is rotatably attached to the lifting / lowering body 7, and a chuck 10 is provided on the ring 8 via vertical vibration means (sub-cylinder) 9 of the chuck.

The clamp 2 has a built-in fluid pressure cylinder 2a and the existing pile P1.
It is possible to move in a direction perpendicular to the pile row direction corresponding to the web position of. A guide 5a is formed in front of the mast 5,
The lifting body 7 is vertically moved by the fluid pressure cylinder 6 along the guide 5a.

FIG. 3 is a partial sectional front view of the lifting body and the chuck, and FIG.
The figure is a side view of the same section.

The elevating body 7 is a cylindrical body having an engagement step portion 7a formed therein.
The engagement protrusion 8a of the ring 8 engages with the engagement step portion 7a.

The ring 8 has a cylindrical shape with its upper part closed, and has an engaging projection 8a formed on the outer periphery thereof and an oscillating cylinder 9 serving as a vertical oscillating means of the chuck 10 fixed therein. In this embodiment, a fluid pressure cylinder is used as the vertical vibration means 9. A gear (not shown) is threaded on the engaging projection 8a so that it can be driven by a rotating means.

The chuck 10 is formed with a housing portion 11 for the vibration cylinder 9, and the lower end of the rod 9a of the vibration cylinder 9 is fixed to the chuck 10. Further, an insert portion 12 for inserting the press-fitting pile P2 is formed in the longitudinal direction inside the chuck 10, and fluid pressure cylinders 13, 13 for holding the press-fitting pile P2 toward the insert portion 12 are internally provided. A fixed claw 15 is formed at a position corresponding to the movable claw 14 at the rod end of the fluid pressure cylinder 13.

In the longitudinal direction of the inner peripheral surface of the ring 8 and in the longitudinal direction of the outer peripheral surface of the chuck 10, as shown in FIG.
8b and a key 10b that engages with the key groove 8b. Alternatively, as shown in FIG. 7, the key groove 10c may be formed in the chuck 10, and the key 8c engaging with the key groove 10c may be formed in the ring 8. Next, the operation of this embodiment will be described.

As shown in Fig. 1, the existing piles P1, P1 ... Are clamped by the clamps 2, 2 ..., and the pile press-in / pull-out machine 1 is installed on the existing pile row. The press-fitting pile P2 is inserted into the insertion portion 12 of the chuck 10 and the fluid pressure cylinder 13 is operated to be held by the movable pawl 14 and the fixed pawl 15. The press-fitting pile P2 is connected to the existing pile P1, and the fluid pressure cylinder 6 is operated to press-fit into the ground.

Then, the oscillating cylinder 9 is appropriately operated to move the press-fitting pile P2 up and down at a high speed to collide the tip of the press-fitting pile with the ground. The impact force at the time of collision destroys the hard ground and presses the piles deeper into the ground. The vibration cylinder 9 may be operated while the fluid pressure cylinder 6 is stopped.

Further, when the vibration cylinder 9 is operated when the peripheral frictional resistance of the press-fitting pile P2 becomes large, the soil adhered to the press-fitting pile P2 is separated and the frictional resistance is reduced.

As described above, in this embodiment, in addition to the fluid pressure cylinder 6, the vibration cylinder 9 is configured. Therefore, the chuck 10 can be operated by the vibration cylinder 9 without operating the fluid pressure cylinder 6.
Only can be moved up and down independently. for that reason,
The press-fitting pile P2 can be moved up and down as appropriate to give a shock to the ground, and the frictional resistance of the press-fitting pile peripheral surface can be reduced.

Further, since the vibrating cylinder 9 is incorporated between the ring 8 and the chuck 10, the chuck 10 can also be made compact.

(Effects of the Invention) Since the present invention has the above-described configuration, the chuck can be made compact, and the chuck can be independently moved up and down by the vertical vibrating means without using the main cylinder. It is possible to reduce the frictional resistance on the circumferential surface and to accelerate the press-fitting into the ground by the impact force.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a front view, Fig. 2 is a side view of the same, Fig. 3 is a partial sectional front view of a lifting body and a chuck, and Fig. 4 is a sectional side view of the same. FIG. 5 is a bottom view of the same cross section, and FIGS. 6 and 7 are explanatory views of the engagement state between the chuck and the ring. 1 …… Pile press-in / pull-out machine, 2 …… Clamp 3 …… Saddle, 5 …… Mast 6,13 …… Fluid pressure cylinder, 7 …… Elevator 8b, 10c …… Keyway, 8c, 10b …… Key 9 …… Vertical vibration means, 10 …… Chuck P1 …… Existing pile, P2 …… Press-fit pile

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-2-70823 (JP, A) Actual application No. 59-147023 (No. Sho 61-62942) Attached to the application and the contents of the drawings Microfilm (JP, U) Practical Application Sho 54-76096 (Actual Development Sho 55-178047) The description and drawings attached to the application attached to the microfilm (JP, U) Practical Application Sho Micro film (JP, U) of the contents of the specification and drawings attached to the application for No. 56-54972 (Shokai No. 57-187836)

Claims (1)

(57) [Scope of utility model registration request] 1. A clamp for holding an existing pile is attached to a lower surface of a saddle, a mast is erected on a slide base provided so as to be slidable back and forth with respect to the saddle, and a ring is rotated on an elevating body provided at a front end of the mast. It is freely attached, the chuck is fitted in the ring so that it can be vertically vibrated, and the rotation of the ring can be transmitted to the chuck by a key and a key groove, and a vertical vibrating means is provided in the chuck. A pile press-in / pull-out machine in which a chuck is attached to the ring via the pile.