JP2008214937A - Pile press driving/drawing unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a pile press driving/drawing unit capable of making a small sharp turn and adjusting the rotation of a pile around an axis by hydraulic pressure. <P>SOLUTION: A leading end of a boom 3 of a construction vehicle 1 is provided with a hydraulic motor 4 rotated on the vertical axis. An attachment 2 is disconnectably connected to the hydraulic motor 4 via an auger rod 5. The attachment 2 comprises: a gantry type leader 9 which makes upper ends of vertically-elongated guide supports 7 and 7 connected together by means of a connecting member 8; a chuck 11 for holding and releasing the pile; and a hydraulic cylinder 13 for hoisting and lowering the chuck 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a pile press-in punching device used for press-fitting into a ground of a pile constructed as a mountain retaining work and a punch-out of the pile, and more particularly to a pile press-in punching device driven by hydraulic pressure. .

  When building a building with an underground floor, underground excavation is performed, but at that time, a pile is driven into the ground as a mountain retaining work so that the stepped portion between the ground and the underground does not collapse. As the pile, H-shaped steel is often used.

As a device for driving such a pile made of H-shaped steel into the ground, a device in which the pile is pressed into the ground using hydraulic pressure is known (for example, see Patent Document 1).
The pile press-fitting device of Patent Document 1 attaches a leader to the tip of a boom via a turning mechanism, repeatedly holds the portion of the leader near the ground near the ground, and presses the pile into the ground by a hydraulic cylinder. A repetitive pushing mechanism is provided. According to such a pile press-fitting device, the pile can be punched out by changing the timing of gripping and releasing the pile.

JP-A-8-13487

However, the pile press-fitting and punching device as in Patent Document 1 requires a long leader corresponding to the length of the pile, and there is a problem that a construction vehicle that handles it becomes large and does not work well.
Further, when the pile rotates around the vertical axis, a worker who is near the pile manually rotates the leader to manually return the pile.

This invention is made | formed in view of such a problem, The objective is to obtain a pile press-fitting punching device with a small turn.
Another object of the present invention is to enable the pile to be rotated around the axis only by operating the hydraulic control device.

  In order to achieve these objects, in the present invention, a construction vehicle provided with a hydraulic motor that rotates around an axis in the vertical direction at the tip of a boom is detachably connected to the hydraulic motor via an auger rod. The pile press-fitting and punching device is configured by the attachment. The attachment is provided between a pair of guide struts extending in the vertical direction and a gate-shaped reader composed of a connecting member that interconnects the upper ends of the guide struts, and is movable between the guide struts along the guide struts. And a chuck that can grip and release the pile by hydraulic pressure, and a hydraulic cylinder that is provided between the connecting member and the chuck and moves the chuck up and down.

By comprising in this way, since an auger rod and an attachment can be made short compared with a pile, respectively, the construction vehicle which handles them may be small. Therefore, it can be set as a pile press-fitting punching device with a small diameter.
Further, since the pile can be rotated around its axis by rotating the hydraulic motor, the orientation of the pile can also be adjusted by operating the hydraulic control device.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows an embodiment of a pile press-fitting and punching device according to the present invention, FIG. 1 is an overall side view thereof, and FIG. 2 is a front view of an attachment. 3 is a sectional view taken along line III-III in FIG. 2, and FIG. 4 is a sectional view taken along line IV-IV in FIG.

  As apparent from FIG. 1, the pile press-fitting and punching device includes a construction vehicle 1 and an attachment 2. The construction vehicle 1 uses a digging pillar car and includes a boom 3 that can be raised and lowered. At the tip of the boom 3, a hydraulic motor 4 with a speed reducer that rotates around an axis in the vertical direction is provided. An auger rod 5 is connected to the hydraulic motor 4. The attachment 2 is detachably connected to the lower end of the auger rod 5 via a joint 6.

  As shown in FIG. 2, the attachment 2 is a portal reader 9 comprising a pair of guide columns 7, 7 extending in the vertical direction and a connecting member 8 that connects the upper ends of the guide columns 7, 7 to each other. It has. A reaction force plate 10 that contacts the ground is provided at the lower end of the portal reader 9.

  As apparent from FIGS. 2 and 3, a chuck 11 is provided between the pair of guide columns 7 and 7. Four guide rollers 12, 12,... Are provided on the left and right side surfaces of the chuck 11 respectively in the front and rear, and the guide columns 7, 7 are sandwiched from the front and rear by the guide rollers 12, 12,. It has become. In this way, the chuck 11 is guided and moved by the guide columns 7 and 7.

  On the upper surface of the chuck 11, a lower flange 14 of a lifting hydraulic cylinder 13 is fixed by bolts 15, 15,. The upper end of the piston rod 16 of the hydraulic cylinder 13 is connected to the connecting member 8 at the upper end of the portal reader 9 via a hinge pin 17. Thus, the chuck 11 moves up and down along the guide columns 7 and 7 by expanding and contracting the lifting hydraulic cylinder 13.

The chuck 11 grips a flange f of a pile P made of H-shaped steel, and has a T-shaped opening 18 penetrating vertically. The flange f of the pile P is inserted through the opening 18.
As shown in FIG. 4, a horizontal chuck hydraulic cylinder 19 is built in the chuck 11. The hydraulic cylinder 19 has a piston 20 fixed thereto. By supplying pressure oil to the oil chamber 21 on the tip side from the piston 20, the cylinder front wall 22 advances, and pressure oil is supplied to the oil chamber 23 on the opposite side. As a result, the cylinder front wall 22 is retracted. The cylinder front wall 22 is provided with a non-slip 24 that contacts the flange f of the pile P. Thus, by supplying pressure oil to the oil chamber 21, the flange f of the pile P is sandwiched and held between the front wall 22 of the chuck hydraulic cylinder 19 and the chuck 11, and pressure oil is supplied to the oil chamber 23. As a result, the grip is released.

  The pressure oil is supplied to the hydraulic motor 4 and the hydraulic cylinders 13 and 19 from the construction vehicle 1 side. That is, the construction vehicle 1 is provided with a control lever (not shown) as a hydraulic control device that controls the pressure oil supplied to the hydraulic motor 4 and the hydraulic cylinders 13 and 19.

Next, the operation of the pile press-fitting and punching device configured as described above will be described.
Usually, the attachment 2 is loaded on the construction vehicle 1 in a removed state.
At the construction site, when the ground is hard, an auger (not shown) is attached to the joint 6 at the tip of the auger rod 5, the auger is rotated by rotating the hydraulic motor 4, and the soil where the pile is driven is removed. Unravel. Next, the auger is removed, and the attachment 2 is attached instead. When the ground at the construction site is soft, the attachment 2 is attached to the tip of the auger rod 5 from the beginning.

  In this state, the lifting hydraulic cylinder 13 is extended, and the chuck 11 is positioned at the lowest position. Then, the lower end of the pile P is inserted into the opening 18 of the chuck 11. Next, the lifting hydraulic cylinder 13 is contracted to raise the chuck 11. Then, the chuck hydraulic cylinder 19 is operated and the pile P is gripped by the chuck 11. In this state, the lifting hydraulic cylinder 13 is extended and the chuck 11 is pushed down. Thereby, the pile P is press-fitted into the ground. When the chuck 11 reaches the lowest position, the chuck hydraulic cylinder 19 is operated to release the pile P from the chuck 11. Then, the lifting hydraulic cylinder 13 is contracted to raise the chuck 11.

By repeating the expansion and contraction of the lifting hydraulic cylinder 13 and the gripping and releasing of the pile P by the operation of the chuck hydraulic cylinder 19, the pile P is deeply pressed into the ground. The reaction force at that time is transmitted to the boom 3 via the portal reader 9 and the auger rod 5.
During this time, the direction around the axis of the pile P is adjusted by rotating the hydraulic motor 4 by a small angle.

  When punching the pile P that has been driven in, contrary to the above, the lifting hydraulic cylinder 13 may be contracted while the pile P is gripped by the chuck 11. The reaction force at that time is transmitted to the ground via the reaction force plate 10 of the portal guide rail 9.

  Thus, in this pile press-fitting and punching device, all operations for press-fitting and punching the pile P are performed by hydraulic pressure. Therefore, there is no need for manual operation.

The length of the pile P handled by this pile press-fitting punching device is up to the sum of the length of the portal reader 9 and the length of the auger rod 5. That is, each of the attachment 2 and the auger rod 5 may be much shorter than the pile P. Therefore, the construction vehicle 1 on which they are mounted may be small. In this way, it is possible to provide a pile press-fitting and punching device that is small in size.
When the pile P is longer, the auger rod 5 may be added using the joint 6.

The preferred embodiment of the present invention has been described above, but the present invention is not limited to the embodiment, and various design changes can be made within the scope of the present invention. For example, the hydraulic cylinder 19 for chuck can be configured such that the cylinder is fixed and the piston moves. In that case, a non-slip 24 may be attached to the tip of the piston rod.
Moreover, as the pile P, not only H-shaped steel but a rail, a trench pile, and a sheet pile can also be used.

It is a whole side view which shows one Example of the pile press-fitting punch apparatus by this invention. It is a front view which shows the attachment of the pile press-fit punching apparatus. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which follows the IV-IV line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Construction vehicle 2 Attachment 3 Boom 4 Hydraulic motor 5 Auger rod 6 Joint 7 Guide support | pillar 8 Connecting member 9 Portal reader 10 Reaction force board 11 Chuck 12 Guide roller 13 Lifting hydraulic cylinder 14 Lower flange 15 Bolt 16 Piston rod 17 Hinge pin 18 Opening 19 Chuck hydraulic cylinder 20 Piston 21 Oil chamber 22 Cylinder front wall 23 Oil chamber 24 Non-slip P Pile f Flange

Claims (1)

A construction vehicle provided with a hydraulic motor that rotates about the vertical axis at the tip of the boom;
An attachment that is detachably connected to the hydraulic motor via an auger rod;
The attachment is
A pair of guide struts extending in the vertical direction, and a portal reader composed of a connecting member that interconnects the upper ends of the guide struts;
A chuck provided between the guide struts so as to be movable up and down along the guide struts, and capable of gripping and releasing the pile by hydraulic pressure,
A hydraulic cylinder that is provided between the connecting member and the chuck and moves the chuck up and down;
A pile press-fitting and punching device characterized by comprising:

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