JP5819918B2 - Pile press-fitting and drawing machine - Google Patents

Description

  The present invention relates to a pile press-fitting and drawing machine.

2. Description of the Related Art Conventionally, as a device for driving a pile into the ground, a pile press-in machine that takes a reaction force from an existing pile and press-fits the pile into the ground is known.
The pile press-in machine is provided at the lower part of the saddle, and is provided with a clamp device for gripping an existing pile, a mast disposed on a slide base that can move back and forth with respect to the saddle, and a mast at the front end of the mast. And a chuck device that holds the pile pressed into a position adjacent to the existing pile. This pile press-in machine grabs the upper end side of the existing pile with the clamp device, and presses the pile into the ground by lowering the chuck device that grips the pile while taking the reaction force from the existing pile, The pile is pulled out by raising the chuck device that holds the pile (see, for example, Patent Document 1).

The pile presser mast also serves as a guide for the chuck device that moves up and down, and has a height corresponding to the vertical stroke of the chuck device. The overall height of the pile presser also increases.
In addition to the stroke for efficiently press-fitting piles, for example, when exchanging the excavation head of the auger device during the auger combined construction method, the chuck device is lifted up and down to the ground. A substroke for creating a work space is also included.

Japanese Examined Patent Publication No. 63-47848

  In the case of the above-described conventional technology, the total height of the mast is increased and the pile presser is increased in size because the substroke is added to the stroke required for press-fitting construction of the pile. If the pile presser becomes large, it may interfere with carrying the pile presser into the construction site or working at a narrow construction site.

  An object of this invention is to attain size reduction of a pile press-fit drawing machine.

In order to solve the above problems, the invention described in claim 1
A pile press-fitting and pulling machine equipped with a leader mast in which a chuck device for gripping the pile is provided so that it can be raised and lowered,
On the front surface of the leader mast, a mast guide is provided over the top and bottom, and the chuck device is provided with a chuck rail that is guided along the mast guide,
The vertical length of the mast guide is substantially the same length as the stroke length of the chuck device required for the pile press-fitting work for press- fitting and extracting the pile, plus the length of the chuck rail.
In order to further raise the chuck device than during pile press-in work, the chuck rail is configured to be raised to a position where it jumps out above the mast guide ,
The chuck device is limited to move up and down in a range corresponding to the stroke length required for the pile press-fitting work during the pile press-fitting work,
A chuck raising control means for further raising the chuck device to a position where the chuck rail protrudes above the mast guide by performing an operation for raising the chuck device than during the pile press-fitting operation. It is characterized by.

The invention according to claim 2 is the pile press-fitting and extracting machine according to claim 1,
Load control means for switching the load for raising and lowering the chuck device to be lower than the load for raising and lowering the chuck device during the pile press-fitting operation when the chuck rail protrudes above the mast guide. It is characterized by that.

The invention according to claim 3 is the pile press-fitting and extracting machine according to claim 2 ,
The load control means is configured such that when the chuck rail is protruding above the mast guide, the speed of raising and lowering the chuck device is less than the speed of raising and lowering the chuck device during the pile press-fitting operation. It is characterized by switching .

  According to the present invention, it is possible to reduce the size of the pile press-fitting and drawing machine.

It is explanatory drawing which shows operation | movement of the pile press-fit drawing machine which concerns on this invention, and is a state which has a chuck | zipper apparatus in the lowest point at the time of pile press-fit work. It is explanatory drawing which shows operation | movement of the pile press-fit drawing machine which concerns on this invention, and is a state which has a chuck | zipper apparatus in the highest point at the time of pile press-fit work. It is explanatory drawing which shows operation | movement of the pile press-fit drawing machine which concerns on this invention, and is the state which raised the chuck apparatus further than the time of pile press-fit work. It is explanatory drawing at the time of replacing | exchanging the excavation head of the auger apparatus attached to the chuck apparatus of a pile press-fit drawing machine.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a pile press-fitting / drawing machine according to the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the pile press-fitting / pulling machine 10 is a machine that grips a predetermined pile P (for example, a steel sheet pile) with a chuck device 15 and press-fits it into the ground, and is already buried in the ground. Further, a saddle 12 having a plurality of clamping devices 11 that are supported by sandwiching the upper end side of the existing pile P, a slide base 13 that can move back and forth with respect to the saddle 12, and a leader that can turn left and right on the slide base 13 A mast 14, a chuck device 15 attached to the front surface of the leader mast 14 so as to be movable up and down, a main hydraulic cylinder 16 that drives the chuck device 15 up and down with respect to the leader mast 14, and the like.
Moreover, in this embodiment, the auger apparatus 20 is penetrated by the chuck apparatus 15 so that the pile press-fitting and drawing machine 10 can perform the pile press-in construction by the auger combined use method.

The clamp device 11 is provided on the lower surface of the saddle 12. For example, the clamp device 11 can hold and grip the upper end portion of the steel sheet pile by driving a hydraulic cylinder (not shown) in a state where the upper end side of the steel sheet pile which is the existing pile P previously press-fitted is sandwiched. it can. That is, the clamp device 11 functions as a fixing means for fixing the pile press-fitting / pulling machine 10 to the upper end portion of the existing pile P by grasping the existing pile P.
In particular, the clamping device 11 can take a reaction force from the existing pile P that is held and supported so that the pile press-fitting and pulling machine 10 can press-fit the pile P or pull out the buried pile P. In addition, the pile press-fitting and drawing machine 10 is fixed to the upper end portion of the existing pile P and installed.
In addition, since the structure of the clamp nail | claw which consists of a fixed clamp nail and a movable clamp nail with which the clamp apparatus 11 is equipped, the hydraulic cylinder which drives a movable clamp nail, and the operation | movement in which a clamp nail grasps the pile P are known, it is detailed here. Do not mention.

  The slide base 13 moves forward with respect to the saddle 12 and moves the chuck device 15 horizontally to the front side, so that the tip of the existing pile P supported by the leading clamp device 11 is moved without moving the saddle 12. In addition, it is possible to press-fit new piles sequentially.

The leader mast 14 can bend to the right or to bend the direction of the row of piles that are sequentially press-fitted by turning the chuck device 15 by turning left and right with respect to the slide base 13. It is possible.
On the front surface of the leader mast 14, a mast guide 14a is provided over the top and bottom. The vertical length of the mast guide 14a from the upper end to the lower end of the front surface of the leader mast 14 is substantially the same as the stroke length of the chuck device 15 required for the pile press-fitting operation plus the rail length of the chuck rail 15a described later. Designed.
In other words, the vertical length (total height) of the leader mast 14 is designed so that the chuck device 15 moves up and down within the range corresponding to the stroke length of the chuck device 15 required for the pile press-fitting work by the pile press-fitting and drawing machine 10. Has been.

The chuck device 15 is in a state in which the back side thereof is fitted to the front side of the leader mast 14 so as to be movable up and down, and is driven up and down by a main hydraulic cylinder 16 connected to the leader mast 14 and the chuck device 15. ing.
Specifically, the chuck device 15 is provided with a chuck rail 15a guided along the mast guide 14a of the leader mast 14, and the chuck rail 15a is fitted to the mast guide 14a so as to be movable up and down. 15 is moved up and down along the mast guide 14a.
Further, the chuck device 15 can hold and hold the pile P inserted through the chuck device 15 with a pile holding portion that is operated by driving a hydraulic cylinder (not shown). In addition, since the structure and operation | movement of the pile holding part with which the chuck | zipper apparatus 15 is equipped, and the hydraulic cylinder which drives a pile holding part are known, it is not explained in full detail here.

And, when the pile P gripped by the chuck device 15 is press-fitted into the ground, the lifting range of the chuck device 15 is limited to a predetermined stroke length, so that the chuck device 15 is lowered by gripping the pile P; , The pile P is released and the chuck device 15 is raised repeatedly. Thus, the press-in of the pile P is repeated for each stroke in which the chuck device 15 moves up and down, and the pile P can be pressed into the ground deeper than the lift range of the chuck device 15.
Similarly, it is possible to pull out the pile P from the ground by repeatedly holding the pile P and raising the chuck device 15 and releasing the pile P and lowering the chuck device 15.

  In addition, when the pile press-fitting and pulling machine 10 presses and pulls the pile P, the chuck device 15 is restricted to move up and down within a range corresponding to the stroke length required for the pile press-fitting work. The drawing machine 10 is configured to be able to rise to a position where the chuck rail 15a protrudes above the mast guide 14a in order to further raise the chuck device 15 than during the pile press-in operation.

Further, at a position where the chuck rail 15a of the chuck device 15 is fitted to the mast guide 14a of the leader mast 14 so as to be movable up and down, there is a stroke position of the chuck device 15 that moves up and down, and the chuck device for the leader mast 14 Stroke sensors 45a and 45b for detecting 15 height positions are provided.
The stroke sensor 45 a is a magnetic sensor as a sensor master unit attached to the leader mast 14, and the stroke sensor 45 b is a magnet as a sensor slave unit attached to the chuck device 15.

The above-described pile press-fitting / pulling machine 10 performs an operation of press-fitting a new pile P ahead of the existing pile P with the chuck device 15, an operation of clamping and releasing the upper end portion of the existing pile P by the clamp device 11, and the saddle 12. By combining the movement of the slide base 13 in the longitudinal direction, the slide base 13 can be self-propelled and moved on the pile row composed of the existing piles P.
In addition, since the operation | movement in which the pile press-fit extraction machine 10 self-propels on a pile row | line | column is known, it does not elaborate on here.

Moreover, the pile press-fitting / pulling machine 10 includes a controller 1 in which a control unit for controlling the above-described units is incorporated. The control unit includes, for example, a CPU that performs various arithmetic processes and the like, and a ROM that stores various control programs executed by the CPU, data, and the like.
The controller 1 is connected to a stroke sensor 45 a provided in the leader mast 14.
The controller 1 is connected to an operation unit (not shown) that can communicate via wire or wirelessly.

  And the controller 1 performs the process which restrict | limits the chuck apparatus 15 to raise / lower in the range according to the stroke length required for the pile press-fitting work at the time of the pile press-fitting work in which the pile press-fitting / pulling machine 10 presses and pulls the pile P. Run.

Further, the controller 1 operates the operation unit (not shown) to raise the chuck device 15 more than in the pile press-fitting operation, so that the chuck device 15 reaches a position where the chuck rail 15a protrudes above the mast guide 14a. Functions as a chuck raising control means for raising the chuck device 15 further, and executes a process of raising the chuck device 15 higher than a predetermined stroke length range.
In addition, the height which raises the chuck apparatus 15 rather than the time of pile press-fit work is a work space for replacing | excluding the excavation head 21 of the auger apparatus 20 attached to the chuck apparatus 15 at the time of an auger combined use method so that it may mention later. This corresponds to the height that can be secured between the chuck device 15 and the ground.

Further, the controller 1 functions as a load control means for switching so as to reduce the load for raising and lowering the chuck device 15 when the chuck rail 15a protrudes above the mast guide 14a, and the chuck rail 15a functions as the mast guide 14a. A process of reducing the load for raising and lowering the chuck device 15 in a state where the chuck device 15 protrudes upward is performed more than the load for raising and lowering the chuck device 15 during the pile press-fitting operation.
For example, the chuck device 15 can load up to a load of 100% of the maximum output of the apparatus during the pile press-fitting operation in which the pile press-fitting and pulling machine 10 presses and pulls the pile P by load control processing by the controller 1 as load control means. When the chuck rail 15a is in a position protruding above the mast guide 14a, the pile press-fitting / retracting machine 10 is configured to raise and lower the chuck device 15 by limiting the load to 30% of the maximum output of the device. Yes.

  Specifically, as shown in FIG. 1 and FIG. 2, the chuck device 15 of the pile press-fitting / pulling machine 10 starts from the lowest point (see FIG. 1) of the lifting range corresponding to the stroke length. When the stroke sensors 45a and 45b detect that the range is up to the highest point (see FIG. 2) and the controller 1 determines that it is during pile press-fitting work, the pile press-fitting and pulling machine 10 has the maximum output of the device. The chuck device 15 is moved up and down so that a load of 100% can be applied, and the press-fitting construction of the pile is performed.

Further, as shown in FIG. 3, the stroke sensor 45a, the chuck device 15 of the pile press-fitting / pulling machine 10 is further lifted than the pile press-fitting operation, and the chuck rail 15a is in a position protruding above the mast guide 14a. When 45b is detected, the pile press-fitting and drawing machine 10 is configured to raise and lower the chuck device 15 by limiting the load to 30% of the maximum output of the device. In addition, the lifting speed is reduced at the same time as limiting the load.
Then, as shown in FIG. 4, the pile press-fitting / pulling machine 10 raises the chuck device 15 further than the pile press-fitting operation to create a work space between the chuck device 15 and the ground, thereby providing a plurality of excavation heads. It is possible to attach the head support table 30 on which the head 21 is placed to the pile press-fitting / pulling machine 10 so as to be arranged below the chuck device 15, and to suitably perform the exchanging work of the excavation head 21 of the auger device 20. it can.

Here, the reason why the pile press-fitting / pulling machine 10 raises the chuck device 15 further than that during the pile press-in operation is to create a work space between the chuck device 15 and the ground. A load for raising and lowering the device 15 is not required.
Further, in a state where the chuck rail 15a protrudes above the mast guide 14a, the contact range in which the chuck rail 15a and the mast guide 14a are fitted is shortened, and the support force that the leader mast 14 supports the chuck device 15 is reduced. Since it is lowered, the load for raising and lowering the chuck device 15 is reduced so as to reduce the burden on the device when the chuck device 15 moves up and down.

As described above, the total height (vertical length) of the leader mast 14 of the pile press-fitting / extracting machine 10 according to the present invention is equal to the stroke length of the chuck device 15 required for the pile press-fitting work by the pile press-fitting / extracting machine 10. It is designed to have a size that can move 15 up and down. That is, the overall height of the leader mast 14 of the pile press-fitting / drawing machine 10 is designed to be lower than that of a leader mast having a size including a substroke as in the prior art.
By providing the leader mast 14 designed to have a low overall height as described above, the pile press-fitting / drawing machine 10 can be downsized.

  When exchanging the excavation head 21 of the auger apparatus 20 during the auger combined construction method, the pile press-fitting / pulling machine 10 moves up to a position where the chuck rail 15a protrudes above the mast guide 14a. Can be raised further than during the pile press-fitting operation to create a work space between the chuck device 15 and the ground.

As described above, the pile press-fitting / pulling machine 10 can be downsized by reducing the overall height of the leader mast 14.
Further, even in the pile press-fitting and drawing machine 10 that is downsized, the chuck rail 15a can be raised to a position where it jumps out above the mast guide 14a, and a work space can be created between the chuck device 15 and the ground. Therefore, exchanging work of the excavation head 21 of the auger apparatus 20 can be performed during the auger combined construction method.
Further, in a state where the chuck rail 15a protrudes above the mast guide 14a, the load applied to the device can be reduced by reducing the load for moving the chuck device 15 up and down.
Such a pile press-fit pulling machine 10 is an excellent device capable of performing suitable construction.

  In the above embodiment, when the chuck rail 15a is at a position protruding above the mast guide 14a, the pile press-fitting / pulling machine 10 lifts and lowers the chuck device 15 with a load of 30% of the maximum output of the device. Although described, it is not limited to this numerical value. For example, it may be set to a load capable of supporting the weight of the chuck device 15 and the weight of the auger device 20.

  The application of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.

1 Controller (chuck raising control means, load control means)
DESCRIPTION OF SYMBOLS 10 Pile press-fit extraction machine 11 Clamping device 12 Saddle 13 Slide base 14 Leader mast 14a Mast guide 15 Chuck device 15a Chuck rail 45a Stroke sensor 45b Stroke sensor 20 Auger device 21 Excavation head 30 Head support P Pile

Claims (3)

A pile press-fitting and pulling machine equipped with a leader mast in which a chuck device for gripping the pile is provided so that it can be raised and lowered,
On the front surface of the leader mast, a mast guide is provided over the top and bottom, and the chuck device is provided with a chuck rail that is guided along the mast guide,
The vertical length of the mast guide is substantially the same length as the stroke length of the chuck device required for the pile press-fitting work for press- fitting and extracting the pile, plus the length of the chuck rail.
In order to further raise the chuck device than during pile press-in work, the chuck rail is configured to be raised to a position where it jumps out above the mast guide ,
The chuck device is limited to move up and down in a range corresponding to the stroke length required for the pile press-fitting work during the pile press-fitting work,
A chuck raising control means for further raising the chuck device to a position where the chuck rail protrudes above the mast guide by performing an operation for raising the chuck device than during the pile press-fitting operation. Pile press-fitting and drawing machine characterized by Load control means for switching the load for raising and lowering the chuck device to be lower than the load for raising and lowering the chuck device during the pile press-fitting operation when the chuck rail protrudes above the mast guide. The pile press-fitting and extracting machine according to claim 1 , wherein   The load control means is configured such that when the chuck rail is protruding above the mast guide, the speed of raising and lowering the chuck device is less than the speed of raising and lowering the chuck device during the pile press-fitting operation. The pile press-fitting and drawing machine according to claim 2, wherein the pile press-fitting and drawing machine is switched.

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