JPS6340888B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for press-fitting or extracting piles without vibration or noise.

BACKGROUND ART Conventionally, in order to solve pollution problems such as vibration or noise, devices have been provided in which piles are press-fitted or pulled out using hydraulic pressure. In conventional devices of this type, the entire device is moved using a crane truck each time the piles are successively press-fitted or pulled out. In this case, since the mobile crane is in a fixed position, the press-in/extraction device is moved along the arcuate line of motion of the boom of the mobile crane. For this reason, although it is relatively easy to position the press-in and pull-out device, that is, the pile chucking device in the front-back direction, it is difficult to position the chucking device in the left-right direction.

Recently, in order to solve this problem, a movable platform equipped with a chucking device for press-fitting and pulling out piles has been moved in the left-right direction relative to the base, and the chucking device can be easily positioned in the left-right direction. A pile press-in and pull-out device has been proposed that enables pile press-in and pull-out.

However, in this pile press-in and pull-out device, a chucking device for pile press-in and pull-out is fixedly supported in a vertical direction with respect to a movable base. Therefore, for the pile normal,
It is not possible to correct a pile that is being press-fitted with an inclination to the left or right. Also, depending on the geology of the construction site, the pile press-in and settlement may stop due to the hardness of the ground before the pile is press-in and settle to the specified depth. It is necessary to take measures such as hitting the top of the pile.

The purpose of the present invention is to be able to press-fit or pull out piles without vibration or noise, and to easily position the chucking device in the left and right direction when moving the entire device. In addition, it is possible to correct piles that are being press-fitted in an inclined state to the left or right with respect to the pile normal, and even if the pile press-in or sinking stops due to the hardness of the ground, etc. To provide a pile press-in and pull-out device that can reduce the consolidation state and smoothly press-in and sink a pile.

In order to achieve such an object, the present invention includes a base;
A movable base supported so as to be movable in the left and right directions with respect to the base, a device for moving this movable base, a hydraulic cylinder supported on the movable base so as to be movable in the left and right directions with respect to the normal line of the pile, and A chucking device that is connected to the non-pressure cylinder so that it can be raised and lowered together with the hydraulic cylinder, and is supported so that it can move along the direction of expansion and contraction as the hydraulic cylinder expands and contracts, and that holds the pile, and a base or movable base. It is characterized by being equipped with a reaction force chucking device that clamps the supported pile that has already been press-fitted.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings.

As shown in FIGS. 1 to 3, a base 1 has a through hole 2 vertically formed in the center of the front side, and a plurality of outriggers 3 are attached to the front and rear of the base 1. A movable table 4 is supported on the front side of the base 1 so as to be movable in the left-right direction. That is, the movable table 4 has horizontal portions 6 integrally provided on both left and right sides of the vertical portion 5, and a protruding portion 7 provided on the upper part of the vertical portion 5 slides into a groove 8 formed on the underside of the base 1. It is inserted so that it can only be moved. A hydraulic cylinder 10 is installed in the vertical part 5 of the movable table 4.
The tubes are fixed by the arm member 11, and the piston rods 10a, 10 on both sides of the hydraulic cylinder 10
a is fixed to the base 1. Therefore, by moving the tube of the hydraulic cylinder 10, the movable base 4 is moved to the base 1.
It can be moved from side to side. (See Figure 4 B and C). Hydraulic cylinders 12 for press-fitting and pulling out piles are supported in the vertical direction on the horizontal portions 6 on both the left and right sides of the movable base 4, respectively. Each hydraulic cylinder 1
2 is supported at its base by a pin 13 so that it can be raised and lowered in the left and right directions with respect to the normal line of the pile to be driven. A connecting member 14 is connected to the tip of the piston rod 12a of each hydraulic cylinder 12 by a pin 14a orthogonal to the pin 13, so that the piston rod 12a and pin 13 can slide relative to each other. That is, a connecting member 14 is connected to the tip of the piston rod 12a so as to allow the hydraulic cylinder 12 to rise and fall. A chucking device 16 is connected between the lower ends of the hanging portions 15 of each connecting member 14 and located below the horizontal portion 6 of the movable base 4. That is, the upper ring body 17 is fixed between the lower ends of the hanging portions 15 of each connecting member 14, and the lower ring body 18 is rotatably connected to the upper ring body 17 by the holding ring body 20. Auxiliary plates 21 are arranged facing each other on the lower side of the lower ring body 18, a base of a hydraulic cylinder 22 is fixed to each auxiliary plate 21, and a chuck member 23 is fixed to a piston rod 22a of each hydraulic cylinder. Each chuck member 23 is provided with a number of engagement protrusions on opposing surfaces. Thus, each chuck member 23 can be opened and closed by expanding and contracting each hydraulic cylinder 22. A fixed guide 24 is attached to the tube of each hydraulic cylinder 12 in parallel to its axial direction. In the illustrated example, a pair of fixed guides 24 are attached to the front and rear of the tube with a phase shift of approximately 180 degrees, and a movable guide 25 fixed to the hanging portion 15 of the connecting member 14 is engaged with these fixed guides 24. It is supported so that it can only slide. Therefore, the chucking device 16 is connected to the hydraulic cylinder 12 so that it can be raised and lowered, and is also movable along the direction of expansion and contraction of the hydraulic cylinder 12 as the hydraulic cylinder 12 expands and contracts.

A chucking device 26 is provided on the front side of the base 1 to take the reaction force from the piles that have already been press-fitted. This chucking device 26 is suspended from a support plate 27 supported on the base 1 through the through hole 2 of the base 1, and is rotatably supported by the support plate 27.

Next, the operation of the above embodiment will be explained. First, the device is placed at a predetermined position, the height of the outrigger 3 is adjusted to hold the device at a predetermined height, and the chucking device 16 is brought to face the site where the pile is to be press-fitted.
Next, a weight (not shown) is placed on the base 1 to take up the reaction force when the pile is press-fitted. Next, the pile P1 is suspended by a crane and the chucking device 16 is opened.
It is inserted between the chuck members 23 of and brought into contact with the ground. At this time, since the chucking device 16 is located at the lower part of the movable base 4, the pile P1 can be passed between the connecting members 14 and 15 and inserted between the chuck members 23 without lifting it high. The piston rod 12a of the hydraulic cylinder 22 is extended to raise the chucking device 16, and the piston rod 22a of the hydraulic cylinder 22 is extended to clamp the pile P1 by the chuck member 23. After that, the piston rod 12a of the hydraulic cylinder 12
By contracting the chucking device 16, the pile P1 can be pressed into the ground by the stroke of the piston rod 12a. After press fitting, the piston rod 22a of the hydraulic cylinder 22
is retracted, the chuck member 23 is retracted, and the stake P1 is released. Subsequently, the piston rod 12a of the hydraulic cylinder 12 is extended, and by repeating the above-mentioned operations in sequence, the first pile P1 can be press-fitted into the ground to a predetermined depth as shown in FIG. 4A.

After the first pile P1 is press-fitted, the entire device is moved forward by a crane truck and positioned in the front-rear direction to the press-fit position of the second pile P2. After that, as shown in FIG. 4B or FIG. 4C, the tube of the hydraulic cylinder 10 is moved to the left or right, the movable base 4 is moved to the left or right, and the second pile P2 is moved to the left or right. The chucking device 16 is positioned at the press-fitting position. After positioning, the second pile P2 is turned in the opposite direction to the first pile P1, and the second pile P2 is connected to the first pile P1 and press-fitted into the ground in the same manner as the first pile P1. do. Press-fit the third and subsequent piles in the same way,
When press-fitting the third pile P3, as shown in FIG. 4D, the reaction force can be taken from the pile P1 that has already been press-fitted by the reaction force chucking device 26, and no weight is required.

During this press-fitting work, as described above, the left and right hydraulic cylinders 12 are supported by pins 13 so as to be able to rise and fall in the left and right directions with respect to the normal line of the pile to be press-fitted, and the connecting member 14 is connected to the piston rod 12a of each hydraulic cylinder 12. By selectively changing the strokes of the piston rods 12a of the left and right hydraulic cylinders 12, the hydraulic cylinders 12, connecting members 14, 15, and chucking device 16 can be moved up and down as one unit. Therefore, by synchronously expanding and contracting the piston rod 12a of the hydraulic cylinder 12 in this tilted state, the pile P that is being press-fitted in the tilted state can be corrected. Also, base 1
By adjusting the outriggers 3, even if the pile P is being press-fitted with an inclination in either the front or rear direction, this can be corrected. Also, depending on the geology of the construction site, if the piston rods 12a, 12a of the hydraulic cylinders 12, 12 are expanded and contracted synchronously, the press-in settlement of the pile P may be caused by the hardening of the ground before the pile P is press-fitted to a predetermined depth. In such a case, the piston rods 12a of the hydraulic cylinders 12 on both sides, 12, 12,
By alternately contracting or extending 12a, the hydraulic cylinder 12, the connecting members 14, 15, and the chucking device 16 can be tilted together alternately left and right, thereby intentionally imparting left-right movement to the pile P. This allows the consolidation state of the ground relative to the pile P to be reduced, and the pile P can be press-fitted and settled smoothly.

Furthermore, by repeatedly performing the reverse operation while moving the device backward, the piles can be successively pulled out.

Note that the outrigger 3 at the rear center of the base 1 may be provided with a reaction force chucking device on its lower side that can clamp the pile that has already been press-fitted. A movable base that can move in the front-rear direction and a movable base that can move in the left-right direction are sequentially supported on the side, and a hydraulic cylinder is attached to the movable base that can move in the left-right direction so that it can expand and contract in the front-rear direction.
A chucking device can be connected to this piston rod, and while the number of piles to be press-fitted is small, the chucking device can be used as an outrigger supported on the ground, and as the number of piles to be press-fitted is increased, the chucking device can be used to press-fit the piles. The rear stake can be held in place. In this case as well, outriggers may be separately attached to the left and right rear sides of the base 1. In addition, until the pile can be held by this chucking device, an outrigger may be provided at the same position as the chucking device 16 for press-fitting and pulling out, or in front of it. It would be convenient if the bases of the two were removably connected and the outriggers were attached to these bases. Further, a plurality of reaction force chucking devices may be provided in a row, and they may be supported not only on the base 1 but also on a movable table. Further, in each of the embodiments described above, the piston rod 12a of the hydraulic cylinder 12 faces upward, but it may be provided so as to face downward. Furthermore, the number of hydraulic cylinders 12 may be one. In addition to this, the present invention can be modified in various ways without departing from its basic technical idea.

As is clear from the above, according to the present invention, since the pile is press-fitted or pulled out by the expansion and contraction of the hydraulic cylinder, it is possible to prevent the generation of vibration and noise. In addition, the movable platform is supported so as to be movable in the left and right directions relative to the base, and a chucking device for press-fitting and pulling out piles is connected to a hydraulic cylinder installed on this movable platform. Positioning in the left and right directions can be easily performed. In addition, since the hydraulic cylinder and chucking device are raised and lowered together in the left and right directions relative to the normal line of the pile, it is possible to correct piles that are being press-fitted in an inclined state, and also to prevent piles from being press-fitted and sinking into the ground. Even if the system stops due to hardness, etc., it has the advantage of reducing the consolidation state of the ground and allowing the pile to be smoothly pressed in and settled.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the device of the present invention, in which FIG. 1 is a plan view, FIG. 2 is a side view, FIG. 3 is a front view, and FIGS. 4A to D are schematic diagrams for explaining the operation. FIG. 1...Base, 3...Outrigger, 4...Movable base, 1
0...Hydraulic cylinder, 12...Hydraulic cylinder, 14...
Connection member, 16...Chucking device, 22...Hydraulic cylinder, 23...Chuck member, 24...Fixed guide, 25...Movable guide, 26...Chucking device for reaction force.

Claims (1)

[Claims] 1. A base, a movable base supported to be movable in the left and right directions with respect to the base, a device for moving this movable base, and a movable base supported on the movable base so as to be movable in the left and right directions with respect to the normal line of the pile. A hydraulic cylinder, a chucking device connected to the hydraulic cylinder so that it can be raised and lowered together with the hydraulic cylinder, and supported so as to be movable along the direction of expansion and contraction as the hydraulic cylinder expands and contracts, and that clamps a pile, and a base. Alternatively, a pile press-in and pull-out device is supported by a movable base and includes a reaction force chucking device that clamps a pile that has already been press-fitted.