JP2592437B2 - Static load type pile puller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static load type pile pulling machine which is used as an attachment for a moving vehicle such as a backhoe and chucks and pulls an existing pile such as a steel sheet pile or an H-shaped steel by hydraulic pressure. is there.

[0002]

2. Description of the Related Art Conventionally, existing piles in civil engineering work have been pulled out by vibrating the existing piles with a vibrator or the like suspended from a crane or the like, or by using pulleys for crane hook upper and lower wires. The majority of the methods involve connecting to a support column and amplifying the hoisting force of the crane to pull out, or removing the existing pile as a reaction force by raising and lowering the hydraulic cylinder of the static load press-in / draw-out machine.

On the other hand, a method of pulling out a pile using a hydraulic source by setting a pulling machine on an arm or the like of a moving vehicle has been considered in part, but there is a problem that it is not practically used. The major reason is that the position control of the extractor is performed using the hydraulic cylinder of the mobile vehicle, so if the mobile vehicle is tilted or the existing pile is tilted due to the situation at the work site, especially When the above two conditions are overlapped, it is necessary to clear the constraint of maintaining the horizontal position or the inclined position of the moving vehicle as position control of the pulling machine, and there are many technical problems. It is determined to be.

[0004]

However, in such a conventional method, the method using the vibro is high in work efficiency, but violently vibrates and noises. In the method using multiple pulleys, the length of the pile to be pulled out is determined by the height of the column with the multiple pulleys. There is a problem that the work becomes unstable as the work becomes narrower, and is usually applied to piles of 10 meters or less.

[0005] Further, in the above construction method, two cranes are required for pulling out and moving a pile, so that an extra working space for one crane is required. Passing through the vehicle tends to cause the vehicle to be overweight, so the pulley must be installed and removed at the work site. This work usually requires 4 to 5 hours by two workers, and 4 to 5 times as long as other construction methods. On the site, there is a problem that the actual work time is reduced to half or less.

On the other hand, a construction method using a static load press-in / draw-out machine is as follows:
Because existing piles are used as a reaction force, it is difficult to respond to operations other than pulling out continuous piles, especially in the final stage of the operation, it is difficult to respond to 3 to 4 piles used as reaction forces. There's a problem. Further, there is a drawback that only steel sheet piles can be used due to the structure of the device, and the size and shape of the pile are limited.

[0007] Particularly, it is set on an arm or the like of a moving vehicle,
In the static load type drawing machine using the hydraulic source,
Since the attitude control of the drawing machine body must be dealt with simply by changing the attitude of the mobile vehicle, there is a problem that it is not always possible to cope with a work site where conditions change.
Further, as described above, when the moving vehicle is tilted or the existing piles are tilted, it is technically difficult to keep the moving vehicle horizontal, and the responsiveness at the site is poor. Problems arise.

Accordingly, the present invention solves the above-mentioned problems of the conventional pile puller, and eliminates noise by using a static load press-puller which can be used as an attachment for a moving vehicle. It is an object of the present invention to provide a static load type pile puller that can perform work without using a crane or the like, can cope with a work site where conditions change, and can release restrictions on work conditions. It is the purpose.

[0009]

According to the present invention, in order to achieve the above object, one end of a working arm is pivotally mounted on an airframe provided on a self-propelled vehicle with a turning mechanism interposed therebetween. At the tip of the work arm, it can be tilted in the front-rear direction by the driving force of the cylinder for tilting in the front-rear direction, swingable in the left-right direction by the left-right swing mechanism, and freely swingable in the horizontal direction by the built-in swing mechanism. This is a configuration of a static load type pile puller based on a simple pile puller body detachably mounted.

[0010] A support member protrudes from an upper end portion of a main cylinder for pile pulling disposed in the pile puller main body, and a plurality of pin fitting holes are formed in a bracket fixed to the pile puller main body. The working height of the main cylinder can be adjusted by a pin, and the fixed body supported on one side of the pile puller body and the other side of the pile puller body The movable body supported by and the end near the center of this movable body
And a spring for holding the posture of the movable body so as to raise the surface upward. The spring is formed on the end face of the fixed body.
Of the pile due to the hooked claw and the claw formed on the end face of the movable body
It has no effect on the pulling-out direction.
Against the falling direction of the spring against the biasing force of the spring
A pull-out pile drop-out prevention mechanism that acts to chuck the pile is installed.

Further, a fixed body having a claw portion which moves up and down in conjunction with the driving of the main cylinder, and a movable member having a claw portion disposed opposite to the fixed body is provided on a lower portion of the pile pulling machine body. and body, is composed of a chucking cylinder for imparting a rotational force to the movable body, to strengthen the existing pile to pull out chat
When the main cylinder is driven downward by releasing the chucked state of the anti-slip mechanism on one surface of the movable body constituting the anti-slip mechanism, a tip is formed of a pile. A mud-dropping claw is provided to approach or contact the surface to scrape off mud adhering to the pile. Further, a bolt hole for attaching a reaction force plate is cut out on the bottom of the lower part of the pile puller body, and a reaction force plate replacement mechanism that detachably attaches a reaction force plate of any shape according to the situation at the work site Has been deployed.

[0012]

According to this static load type pile pulling machine, the vehicle is driven to the pile pulling work site, and then the pile pulling machine body is tilted in the front-rear direction by the driving force of the cylinder for tilting back and forth. The pile pulling machine body is set on top of a pile that pulls out according to the situation at the work site by swinging in the left and right direction and turning horizontally by the built-in turning mechanism, and the reaction plate is set as the reaction plate Attach to the mounting part to determine the position of the pile puller body.

[0013] and further adjusting the working height of the pile withdrawal for main cylinder by the main cylinder working height adjustment mechanism in accordance with the initial height of the existing pile, the existing pile by the claw portion of the fixed body and the movable body of the slip prevention mechanism By starting the drive of the main cylinder after firmly chucking, the existing pile is gradually pulled out.

After the one-stroke withdrawal operation is completed, when the chucking state of the anti-slip mechanism is released, the pile is prevented from falling automatically by the pull-out pile drop-out prevention mechanism. The tip of the nail for dropping provided on one surface of the movable body constituting the slip prevention mechanism approaches or contacts the surface of the pile, and the mud from the tip to the end of the pile to be pulled is scraped off by the nail for dropping. The surface of the pile is cleaned.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a static load type pile pulling machine according to the present invention will be described below with reference to the drawings. Reference numeral 1 in FIG. 2 denotes a crawler-type backhoe as a self-propelled vehicle, and a body 3 is rotatably disposed on a crawler traveling device 2 via a turning mechanism. A substantially arm-shaped bent working arm 5 pivotally supported at a fulcrum 4 of the machine body 3 is pivotally mounted on a vertically rotatable by a driving force of a tilting cylinder 6.

Reference numeral 7 denotes a static load type pile puller main body to which the present embodiment is applied. The pile puller main body 7 is mounted on the distal end of the working arm 5 via a left and right swing mechanism 8 which will be described in detail later. It is mounted so that it can swing in the direction. Further, a forward / backward tilting cylinder 9 is provided between a bracket 5a provided on the upper surface of the work arm 5 and a bracket 7a provided on the pile puller main body 7 side. ,
A hydraulic motor 10 and a turning gear 11 that constitute a turning mechanism 16 for turning the pile extractor body 7 in a horizontal direction by 360 ° are incorporated.

The details of the above components will be described below. 1 (A), 1 (B) and 3, a pile insertion port 1 in which both a normal steel sheet pile and an H-shaped steel can be used is provided in a pile puller body 7.
5 is open. The tip of the working arm 5 is pivotally supported on one end of a pile puller body 7 by a pin 12 so as to be tiltable, and a rod 9 extending from a forward and backward tilting cylinder 9.
Due to the reciprocating motion of a, the pile puller body 7 rotates in the front-rear direction. Reference numeral 13 denotes a hydraulic motor for swinging left and right, and reference numeral 14 denotes a gear interlocked with the hydraulic motor. The hydraulic motor 13 and the gear 14 constitute a left-right swinging mechanism 8.

Reference numeral 17 denotes a main cylinder for pulling out a pile, and a support member 17a projecting from the upper end of the main cylinder 17 is fitted between brackets 18 fixed to the main body 7 of the pile puller. It is fixedly supported by a pin 19. The brackets 18 are provided with a plurality of pin insertion holes, and the working height of the main cylinder 17 can be adjusted by changing the insertion position of the pins 19.
Therefore, the main cylinder working height adjusting mechanism 40 is constituted by the support member 17a, the bracket 18 and the pin 19.

A pull-out pile drop-out prevention mechanism 23 is provided at a substantially intermediate portion of the pile pulling machine main body 7. The pull-out pile drop-out prevention mechanism 23 includes a fixed body 20 supported on one side of the pile puller main body 7, a movable body 21 supported on the other side of the pile puller main body 7, and a central portion of the movable body 21. Pull the end face upward
And a spring 22 for holding the posture of the movable body 21 so as to raise it . A claw portion 20a is formed on the end face near the center of the fixed body 20 with which the drawing pile comes into contact,
Similarly, a claw portion 21a is formed on the end face near the center of the movable body 21 where the pulling pile contacts. The vicinity of the end near the side of the movable body 21 is rotatably supported at the fulcrum 24 on the pile extractor main body 7, and the spring 22 is provided between the vicinity of the claw 21 a and the pile extractor main body 7. It is arranged.

The claw portion 21a of the movable body 21 has no effect on the pile in the pull-out direction.
There the other hand, the reverse direction, that fall beside the pile and drawing direction of the pile
In the direction opposite to the biasing force of the spring 22
The that has become a force acts shape to chuck. Therefore, when the pile located between the two claws 20a and 21a tries to fall, the pile is automatically chucked by the two claws 20a and 21a to prevent the pile from falling.

On the lower side of the pile extractor body 7, the pile
The existing pile to be pulled out by the drawing machine body 7 is firmly chucked.
Anti-slip mechanism 28 is deployed that. The anti-slip mechanism 28 moves up and down in conjunction with the driving of the main cylinder 17, and is disposed opposite to the fixing body 25, and similarly moves up and down in conjunction with the driving of the main cylinder 17. It comprises a movable body 26 and a chucking cylinder 27 for applying a rotational force to the movable body 26. As described later, the chucking cylinder 27 also serves as a mud dropping cylinder attached to the pile.

A claw portion 25a is formed on the end face of the fixed body 25 near the center where the drawn pile contacts, and a claw portion 26b is formed on the end face of the movable body 26 near the center where the drawn pile contacts. . The movable body 26 is rotatably supported by a fulcrum 29 in the vicinity of an end near the side.

Numeral 30 denotes a nail for removing mud of a pull-out pile provided on one surface of the movable body 26. The mud-dropping claw 30 extends from the tip to the end of the pile to be pulled out using the rotation of the movable body 26. It has a function to remove mud. The mud dropping claw 30 is replaceable when worn, and is made of a material corresponding to the hardness, quantity and quality of the attached mud.

Further, a reaction force plate replacing mechanism 31 is provided on the lower side of the pile puller body 7. This reaction plate replacement mechanism 31
As shown in FIGS. 6 (A) and 6 (B), bolt holes 32 for mounting a reaction plate are formed in the bottom surface as shown in FIGS. It is detachably mounted.

The basic operation of this embodiment will be described below. First, the backhoe 1 on which the fuselage 3 is freely rotatable.
Self-propelled to the pile pulling work site by driving the crawler traveling device 2, and fix the reaction force plate 33 corresponding to the situation of the work site to the bottom of the pile pulling machine main body 7 using the bolt holes 32, 32. After that, the work arm 5 is turned up and down by the driving force of the tilting cylinder 6, and the pile to be pulled out is inserted into the insertion opening 15, and the pile pulling machine body 7 is set.

At the time of setting, by driving the forward / backward tilting cylinder 9, the pile puller body 7 can be tilted in the front / rear direction as shown in FIG. , The pile pulling machine body 7 can swing right and left around the fulcrum 36 as shown in FIG. 5 with the rotation of the gear 14 interlocked with the hydraulic motor 13.

Further, the hydraulic motor 1 constituting the turning mechanism 16
By driving 0, the pile puller body 7 turns 360 ° in the horizontal direction by the action of the turning gear 11. Accordingly, the pile pulling machine body 7 can be adjusted to an optimum posture by the above-described front-rear tilting cylinder 9, the left-right swinging mechanism 8 and the turning mechanism 16 in accordance with various directions of the pile to be pulled out.

Further, according to the initial height of the existing pile to be pulled out, the insertion position of the pin 19 into the plurality of pin insertion holes drilled in the brackets 18 constituting the main cylinder working height adjustment mechanism 40. Is changed, the working height of the main cylinder 17 is adjusted to an optimum height.

After the preparation for pile removal is completed in this way, the chucking cylinder 27 constituting the anti-slip mechanism 28 is extended, so that the movable body 26 is centered on the fulcrum 29 near the end near the side. By turning clockwise, the pile 35 to be pulled out is firmly chucked by the claw 25a of the fixed body 25 and the claw 26b of the movable body 26 as shown in FIG. At this time, the mud-dropping claw 30 provided on one surface of the movable body 26 is separated from the pile 35.

The driving of the main cylinder 17 is started after the pile 35 is chucked by the claws 25a and 26b, whereby the pile 35 is gradually pulled out. At the time of pulling out, the pulling-out pile drop-out prevention mechanism 23 provided at a substantially middle portion of the pile pulling-out machine body 7 has no effect on the pile 35.

After the stake 35 is pulled out by a certain length,
The driving of the main cylinder 17 is temporarily stopped, and the slip prevention mechanism 28 is stopped.
, The movable body 26 rotates counterclockwise about the fulcrum 29, and the pile 35 to be pulled out as shown in FIGS. 8, 9, and 10. , The claw portion 26b of the movable body 26 separates.
At this time, the pull-out pile drop-out prevention mechanism 23 disposed at a substantially intermediate portion of the pile pulling machine body 7 works to prevent the pile 35 whose chuck state has been released from falling.

As described above, the pull-out pile drop-out prevention mechanism 23
Is, Do not have a any of the action against the drawing direction of the pile 35
On the other hand, the spring 22 is urged against the falling direction of the pile .
Since the force to chuck the pile works against the force,
When the chucking state of the pile 35 by the holder 17 is released, the claw portion 21 of the movable body 21 supported by the spring 22 is released.
a between the a and the claw portion 20a of the fixed body 20 automatically.
It is chucked and the pile 35 is prevented from falling.

As the movable body 26 rotates counterclockwise about the fulcrum 29, the tip of the mud dropping claw 30 provided on one surface of the movable body 26 as shown in FIG. It approaches or comes into contact with the pile 35. By starting the downward drive of the main cylinder 17 in this state, the claw 30
As a result, mud adhering to the surface of the pile to be pulled is scraped off, and the pile 35 is cleaned.

By moving the main cylinder 17 downward by a predetermined length and then extending the chucking cylinder 27 again, the movable body 26 rotates clockwise about the fulcrum 29, as shown in FIG. Then, the pile 35 is chucked again by the claw 25a of the fixed body 25 and the claw 26b of the movable body 26, and the pile 3
5 is pulled out by a certain length. An existing pile can be pulled out step by step by repeating the same operation.

Then, the one-stroke drawing operation is completed,
Each time the chuck state of the pile 35 is released for the next pulling, the pulling-out mechanism 23 prevents the drop of the pile 35, and the main cylinder 17 is driven downward for the next pulling operation. Each time, the mud adhering to the surface of the pile 35 is scraped off by the mud dropping claw 30, so that the mud from the tip to the end of the pile 35 can be removed at the end of the drawing operation.

As described above in detail, the static load type pile puller according to the present invention can freely change the tilting posture of the pile puller body 7 in the vertical direction, the front-rear direction and the left-right direction, and the horizontal turning angle. It is possible to cope with any inclination of the existing pile, and even when the anti-slip mechanism 28 releases the chuck of the pile 35,
It is a major feature of the operation that the falling of the pile is automatically prevented and the mud dropping work is performed simultaneously with the pile pulling out work.

[0037]

As described in detail above, the static load type pile puller according to the present invention is a method of pulling out a pile using a hydraulic cylinder using a hydraulic source of a moving vehicle such as a backhoe. Vibration and noise, which are likely to occur in the conventional method, are eliminated, and there is no restriction on the inclination, length and working radius of the pile to be pulled out. The size and shape are not limited, and the work can be stabilized even when a long pile is pulled out.

Further, since a crane for pulling out and moving the pile is not required, no extra working space is required, and the body of the pile pulling machine can be used as an attachment for a moving vehicle. By doing so, there is an advantage that the weight of the vehicle when traveling on the road is not exceeded.

By using the fixed body and the movable body of the anti-slip mechanism, the chucking of the pile can be performed with less hydraulic pressure than the cylinder direct-acting system without slipping. Furthermore, the provision of the pull-out pile drop-out prevention device at the substantially middle portion of the pile pulling machine main body prevents the pile from falling even when the chucking of the pile is released, thereby improving the work stability and the efficiency. In addition, the reaction plate for the reaction plate mounting portion can be freely replaced, and it is easy to match the pile pull-out operation condition.

Further, the mud adhering to the pulled-out pile can be scraped down from the tip to the end of the pile by the mud-dropping claw simultaneously with the lowering drive of the main cylinder. The heavy labor of dropping work can be eliminated.

As described above, the present invention can be used as an attachment for a moving vehicle, can prevent noise, can work without using a crane, and is a static load type that can cope with a work site where conditions change. A pile pulling machine can be provided.

[Brief description of the drawings]

FIG. 1 (A) is a plan view of a pile puller body according to the present invention, and FIG. 1 (B) is a front view thereof.

FIG. 2 is a side view showing an entire embodiment of a static load type pile puller to which the present invention is applied.

FIG. 3 is a side view of a pile pulling machine main body.

FIG. 4 is a schematic diagram showing a state in which the pile puller body is tilted in the front-rear direction.

FIG. 5 is a schematic diagram showing a state in which the pile puller body is tilted left and right.

FIG. 6A is a bottom view of a reaction plate replacement mechanism, and FIG.
(B) is a plan view of the reaction plate.

FIG. 7 is a schematic diagram showing an operation mode of performing mud removal by a claw for mud removal.

FIG. 8 is a schematic diagram showing an operation mode of performing mud removal by a claw for mud removal.

FIG. 9 is a schematic diagram showing an operation mode of performing mud removal by a claw for mud removal.

FIG. 10 is a schematic diagram showing an operation mode of performing mud removal by a claw for mud removal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Backhoe 2 ... Crawler traveling device 3 ... Body 5 ... Work arm 6 ... Tilting cylinder 7 ... Pile puller main body 8 ... Left / right swing mechanism 9 ... Front-back tilting cylinder 10 ... (For turning) Hydraulic motor 11 ... (For turning) ) Gear 13 (for left-right swing) hydraulic motor 14 ... (for left-right swing) gear 15 ... Pile insertion port 16 ... Swivel mechanism 17 ... Main cylinder 17a ... Support member 20, 25 ... Fixed body 21, 26 ... Movable body 20a, 21a, 25a, 26b: Claw 22: Spring 23: Pull-out pile drop-out prevention mechanism 27: Chucking cylinder 28: Slip prevention mechanism 30: Mud dropping claw 31: Reaction plate replacement mechanism 33: Reaction plate 35: Pile 40 ... Main cylinder working height adjustment mechanism

Claims (6)

(57) [Claims] An end of a working arm is pivotally mounted on an airframe disposed on a self-propelled vehicle with a turning mechanism interposed therebetween, and a front end of the working arm is moved back and forth by a driving force of a front and rear tilting cylinder. The pile puller body, which can be tilted in the direction and swingable in the left and right direction by the left and right swing mechanism, and can be turned in the horizontal direction by the built-in swing mechanism, is detachably mounted. Static load type pile pulling machine. 2. A support member is protruded from an upper end of a main cylinder for pile pulling disposed in a pile puller main body, and a plurality of pin fitting holes are formed in a bracket fixed to the pile puller main body. The static load type pile pulling machine according to claim 1, wherein the working height of the main cylinder is adjustable by a pin. 3. A fixed body supported on one side of the pile extractor main body, a movable body supported on the other side of the pile extractor main body, and a movable body substantially at an intermediate portion of the pile extractor main body. In the middle
And a spring for holding the posture of the movable body so as to pull up the end face upward, and a claw formed on the end face of the fixed body and a claw formed on the end face of the movable body,
Does not have any effect on the pulling direction of the pile
In the falling direction of the pile, the spring
The static load type pile pulling machine according to claim 1 or 2, further comprising a pulling pile dropout prevention mechanism having a function of exerting a force to chuck the pile. 4. A fixed body with a claw that moves up and down in conjunction with driving of the main cylinder, and a claw with a claw disposed opposite to the fixed body, on a lower portion of the pile puller body. It consists of a movable body and a chucking cylinder that applies rotational force to the movable body, and firmly chucks the existing pile to be pulled out.
The static load type pile puller according to claim 1, 2, or 3 , further comprising an anti-slip mechanism. 5. The tip of the movable body constituting the slip prevention mechanism is brought into contact with or in contact with the surface of the pile when the chuck state of the slip prevention mechanism is released and the main cylinder is driven downward. The static load type pile pulling machine according to claim 1, 2, 3, or 4, further comprising a mud removing claw for scraping off mud adhering to the pile. 6. A bolt hole for attaching a reaction force plate is formed on a bottom surface of a lower portion of the pile pulling machine main body, and a reaction force plate having an arbitrary shape according to a situation at a work site is detachably attached. reaction force plate replacing mechanism deployment claims 1, 2, 3, 4 or 5 static load type pile drawing machine according.