JP2003155747A - Pile pulling work machine - Google Patents

Abstract

(57) [Problem] To provide a working machine for pulling out a pile, which can be constructed in a short time and at a low cost by using a relatively small working machine, and in which the problem of noise generation accompanying the construction is reduced. A work machine equipped with a work front including an articulated arm is used. An auger driving device 6 is attached to the tip of the working front 4, and a casing 8 having an inner diameter larger than the diameter of the pile 9 and having a drilling claw at the lower end is attached thereto. The auger driving device 6 is driven to bury the casing 8 concentrically with the pile 9. A vibration generating device is mounted on the chucked portion 8c provided on the head of the casing 8, and the casing is pulled out to the ground by a crane or a working machine while applying vibration to the casing 8 by the vibration generating device. Thereafter, a wire is connected to the head of the pile 9 and the pile is pulled out by a crane.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine for extracting piles such as concrete piles and pine piles.

[0002]

2. Description of the Related Art As a conventional method for pulling out a pile that has been buried in the ground of a building in order to construct a new building, a sheet pile is hammered around the pile by a hammer or a vibrating device. There is a method of cutting the pile to reduce the frictional force between the pile and the ground and pulling out the pile with a crane.

Further, as described in Japanese Patent Laid-Open No. 57-158432, there is a method in which the casing is driven concentrically with the pile by a hammer or a vibrating device to perform ground cutting, and the pile and the casing are pulled out simultaneously or separately. is there.

Further, a pile driver having a hammer or the like which can be moved up and down along a leader is diverted to a pulling machine, a casing is embedded around the pile to cut the ground, and the pile driver winds the winch. There is a method to pull out the casing.

Further, there is a method of using a ground-installed casing driver used for a pile construction device, rotating the casing around the pile and pushing it in to perform ground cutting in the same manner, and then pulling out the pile with a crane. .

[0006]

In the conventional method using the sheet pile, it is necessary to bury several sheet piles around the piles, which requires man-hours, construction period and construction cost, and a hammer or a vibration device for driving the sheet pile. Therefore, there is a problem that noise and vibration are easily generated in the neighborhood in a densely populated area.

Further, the method of driving the casing with a hammer or a vibrating device also has a problem that noise and vibration are likely to occur in the neighborhood in a densely populated area.

Further, the pile driver and the casing driver have a problem that the device is large and expensive, and the construction cost and the construction period are long. Therefore, the pile driver and the casing driver are not suitable for pulling out concrete piles or pine piles having a relatively small diameter. There is.

In view of the above problems of the prior art, the present invention provides a pile which can be constructed in a short period of time and at a low cost by using a relatively small working machine, and in which the problem of noise generation due to the construction is reduced. An object is to provide a work machine for pulling out.

[0010]

According to a first aspect of the present invention, there is provided a pile pulling work machine, wherein a revolving structure is installed on a traveling structure through a revolving device, and a multi-joint arm composed of four arms and the respective arms are respectively provided. A work front having a plurality of hydraulic cylinders to be driven is attached, and the hydraulic cylinders are moved so that the tip of the multi-joint arm moves vertically up and down based on the angle information of the joints of the respective arms and the length information of the arms. An auger drive device is attached to the tip of the work front so that it can be tilted approximately in the front-rear direction, and a casing having an inner diameter larger than the diameter of the pile is attached to the auger drive device. It is characterized in that claws are provided, and a chucked portion for mounting a vibrating device is provided on the head portion of the casing and / or the head portion of the casing to be added.

As described above, by constructing the machine for burying the casing in which the auger driving device is attached to the tip of the multi-joint arm around the pile, the pullout according to claim 1 can be performed,
Prevention of noise generation, reduction of construction period and construction cost can be achieved.

According to a second aspect of the present invention, there is provided a work implement for pulling out piles according to the first aspect, wherein the casing is provided with an inclined or spiral excavation blade around a lower portion thereof.

As described above, when the inclined or spiral blades are provided around the lower portion of the casing, the digging force can be obtained by the rotation of the casing, and the casing can be efficiently embedded even in the relatively hard ground.

According to a third aspect of the present invention, there is provided a pile extracting work machine according to the first or second aspect, wherein the casing has a plurality of viewing windows arranged vertically.

If the casing is provided with a peephole in this way, when the casing is being rotated and buried, it is possible to visually check through the window whether the pile is grounded and is rotating together with the casing. Therefore, the end time of the casing burying work can be easily known, which contributes to the efficiency of the work.

According to a fourth aspect of the present invention, there is provided a working machine for pulling out a pile.
3 to 3, the casing is tiltably connected to the auger drive device.

Thus, if the casing is tiltably connected to the auger drive device, when the casing is pulled out by the crane using the exciter device, the auger drive device should be located at a position where it does not interfere with the exciter device. It can be set aside and can be quickly transferred to the operation of burying the casing of the pile at another place.

According to a fifth aspect of the present invention, there is provided a pile extracting work machine according to any one of the first to fourth aspects, wherein the casing is provided with a pipe for sending water to be jetted from a lower end thereof.

As described above, if the casing is provided with the jetting pipe, water can be jetted from the lower part of the casing to loosen the ground and efficiently bury the casing.

[0020]

1 is a side view showing an embodiment of a working machine for pulling out a pile according to the present invention. In FIG. 1, 1 is a crawler type traveling body, and 2 is the traveling body 1
It is a revolving superstructure installed above via the revolving device 3. Reference numeral 4 denotes a multi-joint arm that is attached to the revolving structure 2 as a work front, and is a vertically controllable arm in which hydraulic cylinders 5a to 5d are attached to the joints of the four arms 4a to 4d, respectively. That is, in the case of performing vertical control, the angle of the joint is constantly detected, and the position of the tip of the multi-joint arm 4 is always vertically moved based on the information such as the lengths of the individual arms 4a to 4d. Hydraulic cylinder 5 using arithmetic unit
It controls a to 5d.

Reference numeral 6 denotes an auger drive device which is attached to the tip of the multi-joint arm 4 by a pin 7. Generally, the auger drive device 6 is a device for excavating a vertical hole in the ground by attaching a screw auger to its rotation shaft and rotating the screw auger. In the present invention, the casing 8 is attached to the auger drive device 6 to pull out the pile 9.

That is, as shown in FIG. 2 (A), the rectangular connecting portion 8a provided on the head of the casing 8 is fitted into the rectangular hole 10a of the rotary shaft 10 of the auger drive device 6, and the hole 10a is formed.
By inserting the pin 11 into the groove provided in the facing portion of the connecting portion 8a and the connecting portion 8a, the casing 8 is attached by connecting them. The casing 8 has an excavation claw 8b at its lower end, and a head portion provided with a chucked portion 8c for chucking an oscillating device 16 described later. In the present embodiment, an inclined or spiral excavation blade 8d is further provided around the lower portion of the casing 8 in order to obtain the excavation force by the rotation of the casing 8. In addition, in the present embodiment, a plurality of windows 8e are arranged in the vertical direction in order to confirm that the pile is ground and co-rotated.

As shown in FIG. 1, in order to pull out the pile 9 using such a casing 8, the periphery of the head of the pile is excavated to expose the head of the pile 9. Then, the casing 8 is installed so as to be fitted to the head of the pile 9 in a state where the casing 8 is vertically attached to the auger drive device 6. Then, as shown in FIG. 3A, the auger drive device 6 is driven to bury the casing 8 concentrically with the pile 9. At this time, the worker 14 on the ground monitors the pile 9 in the window 8e to check whether or not the co-rotation has started and proceed with the work.

When the piles 9 start to rotate together, it is judged that the ground cutting of the piles 9 has been completed, and the pin 11 connecting the auger driving device 6 and the casing 8 is pulled out to remove the auger driving device 6
Is removed from the casing 8.

Then, as shown in FIG. 3B, the chucking portion of the vibration oscillating device 16 supported by the wire 15 of the crane is chucked and attached to the chucked portion 8c provided on the head of the casing 8. The casing 8 is pulled out to the ground by the crane while the casing 8 is vibrated by the vibration generator 16. Then, as shown in FIG. 3C, the wire 17 is connected to the head of the pile 9 and the pile is pulled out by a crane.

When the casing 8 is buried by using the auger driving device 6 and ground cutting is performed, noise is not generated when hammering the sheet pile or the casing in the conventional method or driving by the vibration generating device, so that the dense land is not generated. The problem of noise generation in is solved. In addition, the construction period and cost are not as high as when using sheet piles, and expensive and large-sized devices are not used as when using a special-purpose casing driver or pile driver. It is possible to reduce the construction cost.

When the length of the casing 8 with respect to the pile 9 is short, as shown in FIG. 2 (B), the connecting portion 8a is detachably attached to the casing 8 with the bolts 19, and the bolts 19 and the like are provided between the casings 8. With the structure in which the casing 8 is removably coupled, the casing 8 is replenished while the connecting portion 8a is attached to and detached from the head of the casing 8.

FIG. 4A is a side view showing another embodiment of the coupling structure of the auger drive unit 6 and the casing 8 according to the present invention. In this embodiment, the auger drive device 6 is attached to the tip of the multi-joint arm 4 by a pin 7 so as to be tiltable in the substantially front-back direction as indicated by an arrow a, and the casing 8 is attached to the rotary shaft 10 of the auger drive device. Connection part 8
f is connected by a pin 20 so as to be tiltable as shown by an arrow b.

As described above, the auger drive device 6 is rotatable in the front-rear direction with respect to the multi-joint arm 4, and the connecting portion 8 of the casing 8 is connected to the rotary shaft 10 of the auger drive device 6.
If f can be tilted, as shown in FIG. 4 (B), when the casing 8 is pulled out by the crane using the vibration oscillating device 16, the auger drive device 6 can be positioned at a position where it does not interfere with the vibration oscillating device 16. Therefore, it is possible to quickly move to the operation of burying the casing 8 in the pile 9 at another place, and the construction period can be shortened.

FIG. 5 is a side view showing another embodiment of the pile extracting work machine of the present invention. Instead of pulling out the casing 8 by the crane shown in FIG. It is to be pulled out by using a working machine having.

That is, the exciter 16 is attached to the chucked portion 8c provided on the head of the casing 8 by a chucking device, and the casing 8 is vibrated by the exciter 16 while the casing 8 is operated by the working machine. Was raised to the ground.

As described above, when the vibrating device 16 is attached to a working machine having a general articulated arm and is used for pulling out the casing 8, the noise generated is not so high that a problem due to the noise also occurs. do not do. Moreover, there is an advantage that the casing 8 can be buried and pulled out by one working machine having an articulated arm without using a crane.

FIG. 6 is a side view showing another embodiment of the pile extracting work machine according to the present invention, in which a nozzle 21 for jetting water is provided in the lower portion of the casing 8 and a pipe 22 for sending water to the casing 8. In addition, the auger drive device 6 is provided with a swivel joint 25 for sending water sent from the water source 23 through the hose 24 to the pipe 22 of the rotating part.

If the nozzles 21 and the pipes 22 for jetting water are attached to the casing 8 in this manner, the casing can be buried efficiently while jetting water from the lower portion of the casing to loosen the ground.

[0035]

According to the present invention, a revolving structure is installed on a traveling structure via a revolving device, and a multi-joint arm composed of four arms and a plurality of hydraulic cylinders respectively driving the respective arms are provided. The work front is provided, and the arithmetic unit is provided to control the hydraulic cylinder so that the tip of the multi-joint arm moves up and down vertically based on the angle information of the joint of each arm, the length information of the arm, and the like. An auger driving device is attached to the front end of the work front so as to be tiltable in a substantially front-rear direction, a casing having an inner diameter larger than the diameter of the pile is attached to the auger driving device, and the casing has an excavating claw at a lower portion thereof. Since the head portion of the casing and / or the head portion of the casing to be replenished has a chucked portion for mounting the vibration generator, the casing is rotated by the auger drive device. The casing can be embedded concentrically in the pile, and the auger drive device does not generate noise when hammering the sheet pile or casing in the conventional method or driving by a vibration generator, eliminating the problem of noise generation in dense areas. To be done. In addition, the construction period and cost are not as high as when using sheet piles, and expensive and large-sized devices are not used as when using a special-purpose casing driver or pile driver. It is possible to reduce the construction cost.

According to a second aspect of the present invention, the casing in which the excavation claw is arranged has an inclined or spiral excavation blade around the lower portion thereof, so that the excavation force can be obtained by rotating the casing. The casing can be efficiently embedded even in the relatively hard ground.

According to a third aspect of the present invention, in the first or second aspect, since the casing has a plurality of viewing windows arranged vertically, when the casing is rotated and buried, the pile is grounded. Whether or not the casing is rotating together with the casing can be visually observed through the window, and the end time of the casing burying work can be easily known, which contributes to the efficiency of the work.

According to the fourth aspect, in any one of the first to third aspects, since the casing is connected to the auger drive device so as to be tiltable, when the casing is pulled out by the crane using the vibration oscillating device, The auger drive device can be set at a position where it does not interfere with the vibration generating device, and it is possible to quickly shift to the operation of burying the casing of the pile at another place.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, since the casing is provided with a pipe for sending water jetted from the lower portion, water is jetted from the lower portion of the casing to loosen the ground. The casing can be embedded efficiently.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a working machine for pulling out a pile according to the present invention.

2A and 2B are partial cross-sectional side views showing examples of casings for pulling out piles by the pile pulling work machine of the present invention.

3 (A) to 3 (C) are process drawings showing an example of a working mode of the pile pulling work machine according to the present invention.

FIG. 4A is a side view showing another embodiment of the structure for coupling the auger drive device and the casing according to the present invention, and FIG.
[Fig. 3] is a side view showing a state where work is being performed using the device of (A).

FIG. 5 is a side view showing another embodiment of the pile extracting work machine according to the present invention.

FIG. 6 is a side view showing another embodiment of the pile extracting work machine according to the present invention.

[Explanation of symbols]

1: traveling body, 2: revolving body, 3: revolving device, 4: multi-joint arm, 6: auger drive device, 7: pin, 8: casing, 8a: connecting portion, 8b: excavating claw, 8c; chucked portion , 8d: excavation blade, 8e: window, 9: pile, 10: rotary shaft, 11: pin, 15: crane wire, 16: vibration device, 17: wire, 19: bolt, 20: pin, 2
1: nozzle, 22: piping, 23: water source, 24: hose,
25: Swivel joint

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toru Uchino             2-6-2 Otemachi, Chiyoda-ku, Tokyo             Standing Machinery Co., Ltd. (72) Inventor Makoto Takano             2-6-2 Otemachi, Chiyoda-ku, Tokyo             Standing Machinery Co., Ltd. (72) Inventor Koji Sanao             2-6-2 Otemachi, Chiyoda-ku, Tokyo             Standing Machinery Co., Ltd. F term (reference) 2D050 AA03 BB07 CB02 CB05 CB32                       CB42 DA03 DA05 DB05

Claims (5)

[Claims] 1. A work front having a multi-joint arm composed of four arms and a plurality of hydraulic cylinders for driving each of the arms, and the work front is mounted on the travel body via a swing device. , An arithmetic unit for controlling the hydraulic cylinder so that the tip of the multi-joint arm vertically moves up and down based on the angle information of the joint portion of each arm, the length information of the arm, etc. An auger drive device is attached so as to be tiltable in the front-rear direction, a casing having an inner diameter larger than the diameter of the pile is attached to the auger drive device, the casing has an excavation claw at a lower portion thereof, and a head or / and a joint of the casing. A work machine for pulling out a pile, characterized in that a chucked portion for mounting an oscillating device is provided on a head portion of a casing to be extracted. 2. The pile pulling work machine according to claim 1, wherein the casing is provided with an inclined or spiral excavation blade around a lower portion thereof. 3. The pile pulling work machine according to claim 1, wherein the casing has a plurality of viewing windows arranged vertically. 4. The work implement for pulling out a pile according to claim 1, wherein the casing is connected to the auger drive device so as to be tiltable. 5. The pile pulling work machine according to claim 1, wherein the casing is provided with a pipe for sending water to be jetted from a lower end thereof.