JPH0565715A - Rotary press type machine for driving and drawing pile - Google Patents

Abstract

PURPOSE:To permit a pile to be driver again immediately after being connected when driving piles by connecting piles in a rotary press manner by a compact device. CONSTITUTION:Guide struts 14 are erectly set on the base frame 4 of a vehicle 1, and an upper rotary penetrator 15 and a lower rotary press drive 16 are set on the upper and lower parts of the struts 14 in a vertically movable manner. In the driver, a hollow rotary shaft 18 through which pile P can be thrust is rotatably supported, a rotary gear 19 to be turned by an oil-pressure motor is attached to the periphery of the shaft 18, and chuck metals 22 are attached to the shaft 18. A pressure ring 24 is which the rear end face is closely contacted with the inner surface and tapered contact face is formed is set rotatably through a press mechanism to the periphery of the metal 22 in a vertically slidable manner. The rotary press driver 15 and 16 are vertically moved by oil-pressure cylinders 37 and 38.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary pile press-in / pull-out device for press-fitting into a ground while rotating a pile and pulling out the driven pile.

[0002]

2. Description of the Related Art As a conventional rotary pile driving device, a rotary driving machine is attached to a leader of a three-point type pile driving machine so as to be able to move up and down, the head of the pile is fixed to the rotary driving machine, and the rotary driving machine is rotated. BACKGROUND ART There is known a device in which a pile is rotationally press-fitted by descending along a leader.

In the conventional rotary press-fitting with a three-point type pile driving machine, the pile head is fixed to a rotary drive machine which is attached to a leader so that it can be moved up and down. After penetrating to the depth, the rotary drive is separated from the pile head and raised, the lower end of the succeeding pile is joined to the preceding pile head, the head is attached to the rotary drive, and rotary press-fitting is performed again. There is a problem that the construction efficiency of the pile is poor because the work needs to be performed, and as a result, the rotary press-fitting work has to be interrupted each time the piles are joined.

[0004]

SUMMARY OF THE INVENTION The present invention solves the problem of inefficiency in the rotary press-fitting by the conventional three-point pile driving machine, in which the construction is significantly interrupted when two or more piles are connected and press-fitted. To do.

[0005]

According to the present invention, a plurality of guide columns 14 are vertically established on a base frame 4 of a crawler 1, and upper and lower portions of the guide columns 14 are vertically movable along the upper and lower portions thereof. A rotary press-fitting machine 15 and a lower rotary press-fitting machine 16 are installed. The upper rotary press-fitting machine 15 and the lower rotary press-fitting machine 16 are supported by the guide columns 14 and are provided with a pile P in a hollow portion in the center of a vertically movable casing 17. A hollow rotary shaft 18 that can be inserted is rotatably supported, and a rotary gear 19 that is rotated by a hydraulic motor is attached to the outer periphery of the hollow rotary shaft 18. A plurality of chuck metal members 22 are attached to the hollow rotary shaft 18. A hole 23 is formed which is fitted in the radial direction of the chuck so as to be able to move back and forth. The outer peripheral portion of the chuck metal member 22 has an inner peripheral surface closely contacted with its rear end surface, and mutual contact surfaces are formed as tapered surfaces. Pressure ring 24 vertically pressing mechanism 26,
The upper rotary press-fitting machine 15 and the lower rotary press-fitting machine 16 are installed between the fixed frame 13 and a part of the outer periphery thereof by being slidably and rotatably installed in the vertical direction via 27, 29, 30, 31. The present invention proposes a rotary pile press-fitting / pulling-out device configured to be lifted and lowered by hydraulic cylinders 37 and 38 connected via.

[0006]

When the pile P is rotationally pressed, the four lifting jacks 3 are adjusted up and down according to the inclination of the crawler 1 with respect to the ground surface, and the base frame 4 is adjusted to an appropriate inclination with respect to the driving direction of the pile P. In this state, each screw anchor 5 is rotated to penetrate into the ground to a predetermined depth, the base frame 4 is firmly fixed and fixed to the ground, and the reaction force at the time of press-fitting or pulling out the pile is set to the ground, Further, the vertically movable gantry 10 and the laterally movable gantry 12 are appropriately slid and adjusted so that the upper rotary press-fitting machine 15 and the lower rotary press-fitting machine 16 above them can accurately correspond to the pile driving positions.

Then, the upper rotary press-fitting machine 15 is moved to the upper end position of the guide column 14, and the lower rotary press-fitting machine 16 is moved to the lower end position, and the respective pressure rings 24 are pushed up by the vertical pressing mechanism to lift the chuck metal 22. Hollow rotating shaft 1
8, the pile P is inserted into the hollow portions of the casing 17 and the hollow rotating shaft 18 until the lower end of the pile P hits the ground surface.

In such a state, the pressing ring 24 of the upper rotary press-fitting machine 15 is pressed down by the vertical pressing mechanism, so that the chuck metal 22 contacting the pressing ring 24 at the tapered contact surface thereof is the core of the hollow rotary shaft 18. The pile P is chucked by advancing in the direction, and the chuck metal 22 of the lower rotary press-fitting machine 16 is left retracted so that the pile P can freely pass and rotate inside, and then the pile P is chucked. By driving the hydraulic motor 21 of the upper rotary press-fitting machine 15 to rotate the hollow rotary shaft 18 via the drive gear 20 and the rotary gear 19, the hydraulic cylinder 37 is extended to lower the upper rotary press-fitting machine 15. The pile P is pressed into the ground while rotating.

When the upper rotary press-fitting machine 15 descends to the bottom dead center while rotationally press-fitting the pile P, the pressing ring 24 is pushed up by the vertical pressing mechanism, the chuck metal 22 retracts to release the pile P, and The hydraulic cylinder 37 contracts to raise the upper rotary press-fitting machine 15 to the top dead center.

After or at the same time when the upper rotary press-fitting machine 15 is raised, the hydraulic cylinder 38 contracts to move the lower rotary press-fitting machine 16 up, and after reaching the top dead center, the lower rotary press-fitting machine 1 is reached.
The chuck metal 22 of 6 moves forward to chuck the pile P, and in this state, the hollow rotary shaft 18 rotates and the hydraulic cylinder 37 extends to cause the lower rotary press-fitting machine 16 to move.
Goes down and presses into the ground while continuing to rotate the pile P.

Thereafter, similarly to the above, the upper rotary press-fitting machine 15 is used.
And the lower rotary press-fitting machine 16 is alternately moved up and down to continuously rotary press-fit the piles P.

On the other hand, when the driven pile P is pulled out, the pile P is chucked by the chuck metal 22 while the upper rotary press-fitting machine 15 and the lower rotary press-fitting machine 16 are alternately lowered, and the hollow rotary shaft 18 is moved. It is pulled out continuously by alternately raising while rotating.

[0013]

EXAMPLE A base frame 4 is mounted on a lower frame 2 of a crawler 1 through four lifting jacks 3 in front, rear, left and right thereof.
Is installed so that the tilt can be adjusted to the front, back, left and right.

The base frame 4 is formed in a substantially rectangular frame shape having a space in the center, and casings 6 of the screw anchors 5 are attached to the front, rear, left and right of the periphery thereof.

The screw anchor 5 is a hydraulic cylinder 7.
It is attached to the rotary shaft of a rotary motor 8 attached to the tip of the telescopic rod, and is configured to penetrate into the ground to a predetermined depth while rotating and firmly fix and fix the base frame 4 to the ground.

On the base frame 4, there is installed a vertically movable pedestal 10 which is slidable along a guide rail 9 provided in the front-rear direction, and on the vertically movable pedestal 10, guide rails 11 provided in the left-right direction. A laterally movable pedestal 12 which is slidable along is installed, and each of the movable pedestals 11 and 12 is adapted to slide by a driving means (not shown) such as a hydraulic cylinder.

A plurality of guide struts 14 each having an upper end attached to a fixed frame 13 are vertically established on the laterally moving pedestal 12, and the upper and lower portions of the guide struts 14 are vertically rotatably press-fitted therewith. Machine 15 and lower rotary press-fitting machine 1
6 is installed.

Upper rotary press-fitting machine 15 and lower rotary press-fitting machine 1
As shown in FIG. 3, reference numeral 6 denotes a casing 1 which is supported by a guide 14 and is vertically movable and divided into three upper, middle and lower portions.
An outer shell is constituted by 7, and a hollow rotary shaft 18 into which a pile P can be inserted is rotatably supported in a hollow portion at the center thereof.

A rotary gear 19 is attached to the outer periphery of the hollow rotary shaft 18 at the portion of the intermediate casing 17a, and a drive gear 20 meshing with the rotary gear 19 is rotated by a hydraulic motor 21 installed in the upper casing 17b. Is configured to rotate.

The hollow rotary shaft 18 is formed with a window hole 23 in which a plurality of chuck metal parts 22 are fitted in a cylindrical lower casing 17c so as to be movable back and forth in the radial direction of the hollow rotary shaft 18, and the chuck metal part 22 is A pressure ring 24 having an inner peripheral surface in close contact with the rear end surface is slidably contacted with a slide plate 25 on the inner peripheral surface of the lower casing 17c so as to be slidable in the vertical direction.
And it is installed rotatably.

The chuck metal 22 and the pressure ring 24 are formed so that the mutual contact surface is a tapered surface whose diameter expands downward, and the tapered contact surface is formed by a meshing joint 25 such as a dovetail joint as shown in FIG. It is slidably connected in the taper direction.

On the upper end surface of the pressure ring 24, a roller 27 attached to the rod tip of a hydraulic cylinder 26, which is fixed to the required portion of the casing 17 and hangs down, rolls in the circumferential direction of the pressure ring 24. A plurality of receiving holes 28 are provided in the lower end surface of the pressure ring 24 at predetermined intervals in the circumferential direction, and a roller 29 is provided at the lower end thereof.
A support shaft 30 attached with is attached slidably, and a compression spring 31 is attached between the bracket of the roller 29 and the bottom surface of the receiving hole 28 or the bottom surface of the pressure ring 24.
The roller 29 is an annular bottom support plate 3 of the casing 17.
It comes into contact with 2 and travels in the circumferential direction together with the pressure ring 24.

The hollow rotary shaft 18 includes an intermediate casing 17a, an upper casing 17b, and a lower casing 17.
The bearings 35 and the collar 36 are provided on the inner peripheral surfaces of the annular intermediate support plates 33 and 34 and the bottom support plate 32 which are arranged between them and c.
It is rotatably supported via the etc.

The upper rotary press-fitting machine 15 is connected by a hydraulic cylinder 37 between a part of its outer circumference and the fixed frame 13 via a bracket, and the lower rotary press-fitting machine 16 is part of its outer circumference and the fixed frame 13. And a hydraulic cylinder 38 which is connected via a bracket between the two.

In the above-described structure, when the pile P is rotationally press-fitted, the four elevating jacks 3 are adjusted up and down according to the inclination of the crawler 1 with respect to the ground surface, and the base frame 4 is properly moved in the driving direction of the pile P. Adjusting to a proper inclination, in this state, rotating each screw anchor 5 to penetrate into the ground to a predetermined depth, firmly fixing and fixing the base frame 4 to the ground, and applying reaction force at the time of press fitting or pulling out the pile to the ground. To set.

Further, the vertically movable mount 10 and the horizontally movable mount 1
2 is appropriately slide-adjusted so that the upper rotary press-fitting machine 15 and the lower rotary press-fitting machine 16 thereabove accurately correspond to the pile driving position.

Next, the upper rotary press-fitting machine 15 is moved to the upper end position of the guide rail 9 and the lower rotary press-fitting machine 16 is moved to the lower end position, and the respective chuck metal members 22 are retracted to the outside of the hollow rotary shaft 18. Casing 17
And, the pile P is penetrated into the hollow portion of the hollow rotary shaft 18 until its lower end hits the ground surface.

In order to retract the chuck metal member 22, the hydraulic cylinder 26 is contracted to raise the roller 27, so that the compression spring 31 mounted around the support shaft 30.
The pressurizing ring 24 is pushed up by the elastic force of, and thereby the chuck metal 22 slidably coupled to the tapered contact surface at the meshing joint 25 retracts in the outer peripheral direction of the hollow rotary shaft 18.

In place of the support shaft 30 and the compression spring 31, a hydraulic cylinder having a roller 29 attached to the upper end is installed on the bottom support plate 32, and the pressure ring 24 is pushed up by the hydraulic cylinder via the roller. Maybe,
Further, the chuck metal member 22 has its rear end projecting from the outer periphery of the hollow rotary shaft 18 for a long time, and a compression spring is attached to the outer periphery between the rear end and the outer peripheral surface of the hollow rotary shaft 18 to provide a pressure ring 24.
The compression spring may be configured to retreat along with pushing up.

In such a state, the hydraulic cylinder 26 of the upper rotary press-fitting machine 15 is extended and the pressure ring 24 is pressed down through the roller 27, so that the chuck metal contacting the taper contact surface is in contact therewith. The pile 22 is pushed forward in the axial direction of the hollow rotary shaft 18 to chuck the pile P, and the chuck metal 22 of the lower rotary press-fitting machine 16 is left retracted so that the pile P can freely pass and rotate inside. To do.

In this way, the hydraulic motor 21 of the upper rotary press-fitting machine 15 chucking the pile P is driven, the hollow rotary shaft 18 is rotated through the drive gear 20 and the rotary gear 19, and the hydraulic cylinder 37 is extended. By operating and lowering the upper rotary press-fitting machine 15, the pile P is pressed into the ground while rotating.

The pressurizing ring 24 connected to the chuck metal 22 with the rotation of the hollow rotary shaft 18 is also the support shaft 3.
The roller 27 rotating with 0 and in contact with the upper end of the roller 27 rolls.

When the upper rotary press-fitting machine 15 descends to the bottom dead center while rotationally press-fitting the pile P, the hydraulic cylinder 26 contracts and pushes up the pressure ring 24 by the elastic force of the compression spring 31 as described above. The chuck metal 22 retracts to release the pile P, and the hydraulic cylinder 37 contracts to raise the upper rotary press-fitting machine 15 to the top dead center.

After or at the same time as the upper rotary press-fitting machine 15 is raised, the hydraulic cylinder 38 contracts to move the lower rotary press-fitting machine 16 up, and after reaching the top dead center thereof, the lower rotary press-fitting machine 1 is reached.
The chuck metal 22 of 6 moves forward in the same manner as described above to chuck the pile P, and the hollow rotary shaft 18 rotates in this state, and
When the hydraulic cylinder 37 is extended, the lower rotary press-fitting machine 16 descends and presses the pile P into the ground while continuing to rotate.

Thereafter, similarly to the above, the upper rotary press-fitting machine 15
And the lower rotary press-fitting machine 16 is alternately moved up and down to continuously rotary press-fit the piles P.

When the piles P are vertically joined and press-fitted, the joining work can be performed with the piles P, P being inserted into and held by the upper rotary press-fitting machine 15 and the lower rotary press-fitting machine 16. It is possible to restart the rotary press-fitting work immediately after joining.

Further, when the pile P is further press-fitted in the vicinity of the previously driven pile P, the vertically movable gantry 10 and the laterally movable gantry 12 are appropriately slid within the moving range without moving the crawler 1. Then, the pile P can be rotationally press-fitted by the same operation as described above.

On the other hand, when pulling out the driven pile P, the reverse operation of the press-fitting operation may be performed.

That is, the pile P is chucked with the chuck metal 22 while the upper rotary press-fitting machine 15 and the lower rotary press-fitting machine 15 are alternately lowered, and the hollow rotary shaft 18 is alternately raised while rotating. , It is possible to pull out continuously.

[0040]

As described above, according to the present invention, the chuck metal and the pressure ring for advancing and retracting the chuck metal provided on the hollow rotary shaft to move back and forth are used to chuck and release the pile, and the upper rotary press-fitting machine and the lower machine. When the rotary press-fitting machine is alternately moved up and down, the piles can be continuously rotary press-fitted or the piles can be pulled out, and the entire device can be configured compactly. , It is possible to carry out the joining work with the mutual piles inserted and held in the upper rotary press-fitting machine and the lower rotary press-fitting machine, and the rotary press-fitting work can be restarted immediately after the joining, and the pile construction can be carried out efficiently. It can be carried out.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional plan view showing an embodiment of the present invention.

FIG. 3 is a vertical sectional side view of the rotary press-fitting machine according to the present invention.

FIG. 4 is a cross-sectional plan view of the rotary press-fitting machine according to the present invention.

FIG. 5 is a vertical cross-sectional side view showing an aspect of rotary press-fitting construction of a pile by the device of the present invention.

FIG. 6 is a vertical cross-sectional side view showing another embodiment of the rotary press-fitting construction of the pile by the device of the present invention.

[Explanation of symbols]

 1 Crawler 2 Lower Frame 3 Lifting Jack 4 Base Frame 5 Screw Anchor 6 Casing 7 Hydraulic Cylinder 8 Rotating Motor 9 Guide Rail 10 Vertically Moving Platform 11 Guide Rail 12 Horizontally Moving Platform 13 Fixed Frame 14 Guide Column 15 Upper Rotating Press-fitting Machine 16 Lower Rotating Press-fitting machine 17 Casing 17a Intermediate casing 17b Upper casing 17c Lower casing 18 Hollow rotating shaft 19 Rotating gear 20 Drive gear 21 Hydraulic motor 22 Chuck metal 23 Window hole 24 Pressure ring 25 Sliding plate 26 Hydraulic cylinder 27 Roller 28 Receiving hole 29 Roller 30 Support shaft 31 Compression spring 32 Bottom support plate 33 Intermediate support plate 34 Intermediate support plate 35 Bearing 36 Collar 37 Hydraulic cylinder 38 Hydraulic cylinder P Pile

Claims (4)

[Claims] 1. A plurality of guide columns are vertically established on a base frame of a crawler, and an upper rotary press-fitting machine and a lower rotary press-fitting machine are installed on the upper and lower parts of the guide posts so as to be vertically movable. In these upper and lower rotary press-fitting machines, a hollow rotary shaft capable of inserting a pile is rotatably supported in a hollow portion at the center of a casing which is supported by the guide columns and can be raised and lowered. A rotary gear that is rotated by a motor is attached, and a window hole is formed in the hollow rotary shaft so that a plurality of chuck metal fittings can be fitted back and forth in the radial direction of the hollow rotary shaft. A pressure ring whose inner peripheral surface is in close contact with and the mutual contact surface is formed into a tapered surface is slidably and rotatably installed in the vertical direction through a vertical pressing mechanism, and the upper rotation The press-fitting machine and the lower rotary press-fitting machine are configured to move up and down by a hydraulic cylinder connected via a bracket between a part of the outer periphery of the press-fitting machine and the upper part of the guide column. Extraction device. 2. The rotation according to claim 1, wherein the base frame is formed in a substantially rectangular frame shape having a space in a central portion, and casings of screw anchors are attached to front, rear, left and right sides thereof. Type pile press-in and pull-out device. 3. The rotary pile press-fitting / pulling-out device according to claim 1, wherein the base frame is supported by front and rear and left and right lifting jacks on a lower frame of the traveling vehicle. .. 4. The guide strut is set up on a movable base installed slidably in the front, rear, left, and right directions on a base frame, "claim 1", "claim 2" or "claim 3". The rotary pile press-fitting and withdrawing device described in.