JPH086320B2 - Pile press machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile press-fitting machine for press-fitting piles such as steel pipe piles, and in particular, a plurality of pairs of fluid pressure cylinders are attached to a chuck and each pair of fluid pressure cylinders are arranged diagonally. To a pile press-fitting machine having the chuck device described above.

[0002]

2. Description of the Related Art Conventionally, a pile press-fitting machine for press-fitting a pile such as a steel pipe pile into the ground has a vertical movement on a guide rail in front of a mast placed on the upper surface of a saddle as seen in, for example, a pile press-fitting / pulling machine. A chuck is attached so as to be possible, the chuck is formed in a cylindrical shape, and the press-fitting machine is clamped by the chuck. A fluid pressure cylinder is vertically installed on the mast side of the rear portion of the chuck, and the fluid pressure cylinder is extended to lower the chuck to press the pile into the ground.

[0003]

In the conventional pile press-fitting machine, a fluid pressure cylinder for vertically moving a chuck for sandwiching the pile is attached to the rear portion of the chuck, that is, the mast side. The input was applied to one side of the chuck in a biased manner, and no press input was applied to the center of the press-fitting pile, causing a loss. Also, as the pile press-fitting progresses, the tip resistance of the pile increases, and the chuck receives a large pressure from the ground upward, so the pressure from the top and bottom causes the press-fitting pile to tilt and the peripheral surface resistance to increase. It becomes difficult to press fit smoothly.

For this reason, a water jet nozzle has been attached near the lower outer periphery of the press-fitting machine to reduce the tip resistance of the pile and the peripheral surface resistance during press-fitting. However, when such a device is used, it requires a long time for the mounting work, and the workability is not efficient for the work of collecting the water jet nozzle after the press-fitting of the pile.

An object of the present invention is to provide a pile press-fitting machine that efficiently applies pressure to a press-fitting pile without causing a loss in the pressure input of a fluid pressure cylinder.

[0006]

In order to achieve the above object, the pile press-fitting machine of the present invention is provided with a retaining clay wall clamp at the tip.
A chuck frame that has a movable frame that has left and right elasticity
At the front and back of the
A flexible frame that can be expanded and contracted in the direction orthogonal to the movable frame (front-back direction).
A jack that can move up and down at the tip of the beam
, And install multiple pairs of fluid pressure cylinders around the chuck device.
Mount it in the same direction and pinch the pair of fluid pressure cylinders.
A chuck device arranged diagonally across the center of the holding hole.
Mounted vertically on the center of the chuck frame
It is characterized by being mounted, and a clamp that holds the existing pile
It hangs down on the saddle, and a mast is erected on the upper part of the saddle.
Place the slide base on the
Below the supporting part formed in the part, multiple pairs of fluid pressure cylinders
Are installed in the circumferential direction of the chuck device, and
The body pressure cylinders are placed oppositely on a diagonal line that passes through the center of the pile holding hole.
It is characterized in that the chuck device installed is attached .

[0007]

[Operation] The pile press-fitting machine is arranged in the groove dug between the earth retaining walls constructed of steel sheet piles facing each other on the left and right, and the stand is extended downward to be grounded. After that, the jack is moved upward and lifted from the ground in the groove, the jack located in the traveling direction of the pile press-fitting machine is moved forward, and the jack located on the opposite side of the jack is lifted. Next, the cylinder of the slide support portion is operated to move the chuck frame forward, each jack is lowered, and the chuck frame is positioned at the pile press-fitting position. Then, the main frame is stretched to abut against the existing steel sheet pile to secure the reaction force.

In this state, a plurality of pairs of fluid pressure cylinders mount and clamp the press-fitting piles in the pile holding holes mounted on the diagonals passing through the centers of the pile holding holes. Then, when statically press-fitting the piles, all the fluid pressure cylinders are extended to press the piles, and when the pile press-fitting speed is increased or when the piles are press-fitted into the hard ground, a part of a plurality of pairs of fluid pressure cylinders is formed. The fluid pressure cylinder is used as a pulse fluid pressure cylinder, and is reciprocated at high speed to press fit. In any of these operations, since the pressure input is applied to the center of the pile, the pressure input is not lost, and the pile can be quickly and accurately pressed.

[0009]

Embodiments of the present invention will be described with reference to FIGS. The pile press-fitting machine 22 is provided with a pair of parallel main frames 3 extending in a direction orthogonal to the space between the steel sheet piles 1 and 2 constituting the left and right soil retaining walls, and a pair of sub-boards is provided inside both ends of the main frames 3. A frame 4 is provided slidably. Further, a fluid pressure cylinder 5 for expanding and contracting the subframe 4 is built in both frames 3, 4.

A chuck frame 7 is movably provided on the main frame 3 along the main frame 3. The chuck frame 7 is provided with a fluid pressure cylinder 8 for movement. The end of the fluid pressure cylinder 8 is fixed to the end of the chuck frame 7, and the tip of the piston rod is fixed to the upper surface of the main frame 3.
It is connected to.

The bracket 9 is the main frame 3
It is attached to two places on the upper surface which are separated from each other in the left-right direction, and the tip of the piston rod can be connected by selecting the bracket 9 according to the amount of movement of the chuck frame 7. Further, if the fluid pressure cylinders 8 are connected in two and the piston rod of one fluid pressure cylinder 8 is connected to the chuck frame 7 and the piston rod of the other fluid pressure cylinder 8 is connected to the main frame 3, the chuck frame 7 slides. The amount of movement can be doubled.

At both ends of the main frame 3, there are provided earth retaining wall clamps 10 which are slidable in a direction orthogonal to the extending direction of the main frame 3. Also,
Substantially rectangular sliders 11 are fixed to both ends of the main frame 3, and rails 11a are formed at upper and lower ends of the slider 11. The soil retaining wall clamp 10 has a substantially rectangular plate shape, and slide grooves 10a that are open inward are formed at upper and lower ends, respectively. Then, the retaining wall clamp 10 can be slid in the front-rear direction by fitting the slide groove 10a into the rail 11a.

The earth retaining wall clamp 10 is attached to the slider 11
The fluid pressure cylinder 12 that slides with respect to is disposed in a space formed on the overlapping surface between the slider 11 and the clasp wall clamp 10. The earth retaining wall clamp 10 is provided with clamp claws 13 that can extend and contract so as to face the surfaces of the steel sheet piles 1 and 2. Each clamp claw 13 is connected to a fluid pressure cylinder 14, and each fluid pressure cylinder 14 is disposed laterally at a predetermined interval on each of the upper and lower slide portions of the soil retaining wall clamp 10.

At the front and rear portions of the lower surface of each soil retaining wall clamp 10, there are mounted stands 15 which project from the lower surface of the clamp 10 and are extendable in the vertical direction.
The stand 15 is expanded and contracted by a fluid pressure cylinder (not shown). Four jacks 16 are mounted on the lower corner of the outside of the chuck frame 7 so as to be extendable in the vertical direction and slidable in the front-rear direction. The jack 16 has a fluid pressure cylinder 1 for expanding and contracting.
7 are provided, and each jack 16 is attached to the tip end portion of the piston rod of the fluid pressure cylinder 17.

Slide support portions 71 extending in the front-rear direction are provided on both left and right lower sides of the chuck frame 7, and a pair of beams 72 slidably held by the slide support portions 71 are connected to respective fluid pressure cylinders. 17 are connected. Each fluid pressure cylinder 17 is slidable in the front-rear direction. Further, a fluid pressure cylinder 18 for slidingly moving each jack 16 is provided. Each fluid pressure cylinder 18 is built in the slide support portion 71, the rear end portion of the fluid pressure cylinder 18 is connected to the slide support portion 71, and the tip end portion of the piston rod is connected to the beam 72.

[0016] A chuck body 61 is mounted at a substantially central portion of the chuck frame 7, the chuck body 6
A single chuck fixing claw 62 and two chuck movable claws 63 are attached to the inner peripheral surface of the device 1 along the circumferential direction. In the chuck body 61, slide grooves 6a are formed in the vertical direction at two opposite positions on the outer surface of the chuck body 61. On the other hand, two guide rails 73 are provided in the vertical direction on the inner surface of the chuck frame 7 so as to face each other. By fitting the guide rails 73 and the slide grooves 6a, the chuck body 61 is placed inside the chuck frame 7. It is held so that it can move up and down.

Fluid pressure cylinders 19a, 19b, 19c and 19d for moving the chuck body 61 up and down are mounted at four corners around the upper surface of the chuck body 61, and each fluid pressure cylinder has a chuck body 61. Pile holding hole 6
They are arranged so as to face each other on a diagonal line passing through the center O of b.
With this arrangement, the pressure input during the operation of the fluid pressure cylinders 19a to 19d is efficiently applied to the center of the pile, so that the loss of the pressure input can be prevented. In the embodiment, two pairs of fluid pressure cylinders 19a, 19d and 19b, 19c are provided, but a plurality of pairs of fluid pressure cylinders arranged diagonally may be provided.

The fluid pressure cylinders 19a to 19d are provided.
Is attached to the upper part of the chuck frame 7, and the tip of the piston rod 20 ...
It is attached to four points on the upper surface of No. 1 in the circumferential direction. Further, a fluid pressure cylinder 23 for opening and closing the chuck is provided on the inner circumference of the chuck body 61. The fluid pressure cylinder 23 is attached to the chuck movable claw 63, and when the fluid movable cylinder 63 expands and contracts, the chuck movable claw 63 moves back and forth to clamp or release the press fitting pile.

Next, the operation of the embodiment of the present invention will be described. As shown in FIG. 5 (A), the pile press-fitting machine 22 is arranged in the groove 21 dug between the steel sheet piles 1 and 2 facing each other on the left and right. Then, the stand 15 is extended downward and grounded so that the main frame 3 is supported on the ground in the groove 21. Next, the fluid pressure cylinder 17 in the advancing direction is operated to move the jack 16 upward to lift it from the inner surface of the groove 21.
In this case, by operating the fluid pressure cylinder 5, the sub-frame 4 is contracted to separate the earth retaining wall clamp 10 from the steel sheet piles 1 and 2, and the main frame 3 is released from the tensioned state.

Next, as shown in FIG. 5B, the jack 16 positioned in the traveling direction of the pile press-fitting machine 22 is slid in the traveling direction by the operation of the fluid pressure cylinder 18. Then, the jack 16 located in the opposite direction of travel is raised by the operation of the fluid pressure cylinder 17.

Next, as shown in FIG. 5 (C), the fluid pressure cylinder 18 for moving the jack 16 located in the traveling direction is actuated to reduce the piston rod and reduce the size of the chuck frame 7.
To move forward. Then, the piston rod of each jack 16 is extended so that each jack 16 is grounded and fixed at the moving position. In this way, the chuck frame 7 moves forward. The operation of the stand 15 and the jack 16 causes the chuck frame 7 and the main frame 3 connected to the chuck frame 7.
Etc., the pile press-fitting machine 22 self-propels in the groove 21.

When the movement to the pile press-fitting position is completed in the groove 21 of the pile press-fitting machine 22 in this way, the retaining wall clamp 10 is slid with respect to the slider 11 for positioning, and then the sub-frame 4 is moved. Extend and hold the earth retaining wall clamp 10
Is pressed against the steel sheet piles 1 and 2, and the main frame 3 is stretched. Therefore, the pile press-fitting machine 22 is installed in the pile press-fitting position by obtaining a reaction force for press-fitting the pile with the steel sheet piles 1 and 2.

The horizontal positioning of the chuck body 61 is performed by moving the jack 16 upward by the operation of the fluid pressure cylinder 17 and raising it from the ground in the groove 21 and then moving the chuck frame 7 by the operation of the fluid pressure cylinder 8. Perform by sliding. In this way, the chuck body 61 is positioned at the pile press-fitting position, and the jack 16 provided on the lower portion of the chuck frame 7 is adjusted and installed horizontally. In order to mount the press-fitting pile on the chuck body 61, first, the piston rods 20 ... Of the fluid pressure cylinders 19a to 19d are contracted to raise the chuck body 61 and raise the position from the ground surface. Then, the press-fitting pile is inserted into the pile holding hole 6b of the chuck body 61 and held by the inside pile holding mechanism.

To press-fit the pile, the four fluid pressure cylinders 19a to 19d attached to the chuck body 61 are operated to extend the piston rods 20 ... To do. At the time when the chuck body 61 is lowered to the lowest position, the clamping of the pile is released, and then the piston rods 20 of the fluid pressure cylinders 19a to 19d are ...
-Is reduced to raise the chuck body 61, and again clamp the upper part of the press-fitting pile, and then lower the chuck body 61. By repeating this operation, the press-fitting pile can be press-fitted to a predetermined depth.

At the time of press-fitting the pile, the pile pressure input by the fluid pressure cylinders 19a to 19d, which are attached to the chuck body 61 and are diagonally opposed to each other and pass through the center O of the pile holding hole 6b, press the center of the pile. Therefore, the press-fitting pile can be press-fitted accurately and quickly without loss of press-fitting force. In addition, in order to press-fit the press-fitting pile to the ground surface, a pile having the same diameter is placed on the top of the press-fitting pile, and the pile is clamped and press-fitted.

Next, a case where a part of the fluid pressure cylinder is used as a pulse fluid pressure cylinder and the pile is press-fitted by reciprocating at high speed will be described. Since the force input when press-fitting the pile acts as a reaction force to float the pile press-fitting machine from the surface,
When a pile is press-fitted into hard ground, if the pile press-in force exceeds the reaction force, the pile press-in machine will float and become unstable, making it difficult to press-in the pile.

Therefore, a part of the fluid pressure cylinders 19a to 19d is used as the pal fluid pressure cylinders 19a and 19d.
It is possible to reciprocate at high speed to crush the hard ground, reduce the tip resistance and peripheral resistance of the pile, and smoothly press fit the pile without increasing the pressure input. In the present embodiment, two of the four fluid pressure cylinders 19a to 19d are operated as pulse fluid pressure cylinders 19a and 19d, but each fluid pressure cylinder 19a to 19d is uniformly attached to the chuck frame 7. Therefore, when the pair of fluid pressure cylinders 19a, 19d arranged diagonally opposite to each other are attempted to reciprocate at high speed as the pulse fluid pressure cylinders 19a, 19d, the fluid pressure cylinders 19b, 19c also try to operate.

Therefore, as shown in FIG. 6, the solenoid valve S1 inserted in the fluid pressure circuits of the fluid pressure cylinders 19a and 19d is switched, and the solenoid valve S2 is switched.
Fluid pressure cylinders 19a, 1
Only 9d can be operated as pulse hydraulic cylinders 19a, 19d.

At the neutral position of the solenoid valve S2, the fluid pressure passages in the fluid pressure cylinders 19b and 19c are connected so that the upper and lower piston chambers are electrically connected. Therefore, even if the pressure fluid is supplied to the pulse fluid pressure cylinders 19a and 19d and reciprocates at high speed, the supply of the pressure fluid to the fluid pressure cylinders 19b and 19c is cut off. And fluid pressure cylinder 19
The pressure fluid in b and 19c reciprocates in the upper and lower piston chambers and follows the operation of the pulse fluid pressure cylinders 19a and 19d.

In the high speed reciprocating operation of the pulse fluid pressure cylinder, the high speed reciprocating operation cycle of the pulse fluid pressure cylinder and the vertical movement speed of the chuck body 61 can be adjusted steplessly by adjusting the switching timing of the solenoid valve S1. .

During pile press-fitting, which is usually executed by static press-fitting, each fluid pressure cylinder 19 mounted on the chuck body 61 is pressed.
When a and ~ 19d are extended and used, and when the pile press-fitting speed is increased or press fit into hard ground, part of the fluid pressure cylinder is used as a pulse fluid pressure cylinder to reciprocate at high speed to press fit the pile. To do. In any case, since each fluid pressure cylinder is arranged on a diagonal line passing through the center O of the pile holding hole 6b, a pressure input is not applied to the center of the pile at the time of operation, so that loss does not occur and efficient press-fitting is performed. I can work.

Another embodiment of the present invention shown in FIGS. 7 and 8 will be described. A slide base 85 on which a mast 86 is erected is placed on a saddle 84 on which a plurality of clamps 83 that hold the existing pile P1 are suspended, and a support portion 87 that supports the chuck body 61 is formed on the upper front part of the mast 86. Four (2 pairs) fluid pressure cylinders 19a, 19 are provided on the support portion 87.
Chuck body 6 moved up and down by b, 19c and 19d
Install 1. Each of the fluid pressure cylinders 19a, 19d is attached to the chuck body 61 by installing a plurality of pairs of fluid pressure cylinders in the circumferential direction of the pile holding holes 6b of the chuck body 61 and as a pair of fluid pressure cylinders 19a, 19d and 19b. 19
The reference character c is a configuration in which the chuck main body 61 is arranged so as to oppose on a diagonal line passing through the center O of the pile holding hole 6b. The guide rail 88 is a rail that guides the chuck body 61 vertically along the mast 86.

The press-fitting of the piles is normally performed. At the time of static press-fitting, the fluid pressure cylinders 19a mounted on the chuck body 61 ,.
When 19d is extended and used, and when the press-fitting speed of the pile is increased or when the pile is pressed into hard ground, a part of the fluid pressure cylinder is used as a pulse fluid pressure cylinder to reciprocate at high speed to press fit the pile. In any case, since the fluid pressure cylinders are arranged on a diagonal line passing through the center O of the pile holding hole 6b, a pressure input is applied to the center of the pile during operation, so there is no loss in the pressure input. Efficient press-fitting work can be performed, and the piles can be press-fitted quickly and accurately. Since the self-propelled operation of the pile press-fitting / extracting machine 80 of the present embodiment on the existing pile P1 row is the same as the conventional self-propelled operation, the description thereof will be omitted.

[0034]

As described above, according to the present invention, a plurality of pairs of fluid pressure cylinders are attached to the chuck, and pairs of fluid pressure cylinders are arranged so as to face each other on a diagonal line passing through the center of the pile holding hole. Since the pile press-fitting force is applied to the center of the press-fitting pile, no loss occurs, the pile can be press-fitted quickly and accurately, and workability is improved. Also, since a part of the fluid pressure cylinder is also used as the pulse fluid pressure cylinder, the structure of the device is simplified and the size is reduced.

[Brief description of drawings]

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

FIG. 2 is a front view showing an embodiment of the present invention.

FIG. 3 is a plan view showing a chuck body of the present invention.

FIG. 4 is a side view of one embodiment of the present invention.

FIG. 5 is an explanatory view showing the operation of one embodiment of the present invention.

FIG. 6 is an explanatory diagram of a fluid pressure circuit of the present invention.

FIG. 7 is a side view showing an embodiment of the present invention.

8 is a cross-sectional view taken along the line VIII-VIII in FIG.

[Explanation of symbols]

 3 Main Frame 4 Sub Frame 6a Pile Holding Hole 7 Chuck Frame 10 Clasp Clamp 15 Stand 16 Jack 22 Pile Press-in Machine 19a, 19b, 19c, 19d Fluid Cylinder 20 Piston Rod 61 Chuck Body

Claims (2)

[Claims] 1. A retaining wall clamp is provided at the tip to extend right and left.
Install freely movable frames at the front and rear of the chuck frame.
And the movable frame on the bottom of both sides of the chuck frame.
A beam that can be expanded and contracted in the direction orthogonal to the frame (front-back direction),
Attach a vertically movable jack to the tip of the beam to
Attach several pairs of fluid pressure cylinders in the circumferential direction of the chuck device
And place the pair of fluid pressure cylinders in the center of the pile holding hole.
The chuck device, which is arranged oppositely on a diagonal line passing through
A pile press-fitting machine characterized by being installed in the center of the rack frame so that it can move up and down . 2. A clamp for holding an existing pile is hung on a saddle.
A sly that is installed down and a mast is erected above the saddle.
The base is slidably mounted and is formed on the upper front part of the mast.
Chucks of multiple pairs of fluid pressure cylinders
Installed in the circumferential direction of the device and paired with fluid pressure cylinder
The chasers are placed diagonally across the center of the pile holding hole.
Tsu pile press-fitting machine, characterized in that attaching the click device.