JP4108500B2 - Pile remover - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pile removing device used when pulling out a pile embedded in the ground.
[0002]
[Prior art]
In ground structures such as buildings, condominiums, factories, etc., piles are embedded up to the hard ground in the ground to support the load. When dismantling these ground buildings, it is necessary to pull out piles deeply embedded in the ground. An example of a pile removing device used at this time is described in Patent Document 1.
[0003]
The pile removing device of Patent Document 1 includes an outer cylinder and an inner cylinder inserted therein. The outer cylinder and the inner cylinder are suspended so that the pile to be pulled out fits in the inner cylinder, the inner cylinder is rotated, and the pile is inserted so that the pile is inserted into the inner cylinder. After digging to the tip of the pile, the inner cylinder and the outer cylinder are moved relative to each other in the rotation axis direction, whereby the pile is gripped by a gripping mechanism provided at the tip of the inner cylinder and the outer cylinder. Thereafter, when the pile removing device is lifted, the pile can be pulled up in a state of being housed in the inner cylinder.
[0004]
According to this pile removing apparatus, the drawing operation of the pile can be performed easily and efficiently with low noise and low vibration.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-164572 [0006]
[Problems to be solved by the invention]
However, in the above-described conventional pile removing device, the upper end of the inner cylinder and the outer cylinder is provided with a rotating device for rotating the inner cylinder, a hydraulic cylinder for moving the inner cylinder relative to the outer cylinder, and the like. That is, a heavy object is attached to the upper end of the double-pipe structure. It is necessary to suspend such a pile removing device in the vertical direction using a crane or the like. Therefore, since the weight of the apparatus is extremely large, a crane having a large lifting capacity is required, and the operation cost increases. Furthermore, since the position of the center of gravity of the device is high, the stability of the device during work is poor.
[0007]
An object of the present invention is to solve the above-described problems of the conventional pile removing device, and to provide a pile removing device that can be operated using a small crane, has a low center of gravity, and has improved stability.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a pile removing apparatus according to the present invention includes a hollow rotating cylinder set up in a substantially vertical direction, a power source that generates a rotational driving force for rotating the rotating cylinder, and the rotation. A chuck mechanism that performs a gripping / opening switching operation on the outer peripheral surface of the cylinder and transmits the rotational driving force to the rotating cylinder when the rotating cylinder is gripped, and the chuck mechanism in the direction of the rotation axis of the rotating cylinder and a first actuator for moving the said chuck mechanism, the are arranged so as to surround the outer circumferential surface of the rotary cylinder, said plurality of biasing force, such as tightening the rotary cylinder is applied chuck band, said plurality of And a second actuator for separating the chuck band from the rotating cylinder against the biasing force .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In the pile removing apparatus according to the present invention, the chuck mechanism performs a gripping / opening switching operation of the rotating cylinder, and the rotating cylinder rotates when the rotating cylinder is gripped. Therefore, when the chuck mechanism grips the rotating cylinder, the first actuator is operated so that the rotating cylinder descends, so that the digging can be carried out so as to store the pile inside the rotating cylinder. Further, when the chuck mechanism opens the rotating cylinder, the gripping position of the rotating cylinder by the chuck mechanism can be moved to the upper end side of the rotating cylinder by operating the first actuator so that the chuck mechanism is raised. By repeating this operation, a pile removing device for efficiently excavating the periphery of the pile can be configured.
[0010]
In addition, since the chuck mechanism performs a gripping / opening switching operation on the outer peripheral surface of the rotating cylinder, there is no need to mount the chuck mechanism and a power source for rotating the rotating cylinder via the chuck mechanism on the rotating cylinder. Therefore, unlike the conventional pile removing device, the weight of the rotating cylinder is not increased, and the position of the center of gravity is not increased and the stability is not deteriorated. Therefore, the work can be performed using a small crane having a relatively small lifting capacity.
[0011]
In pile punching device of the present invention, the first actuator in a state in which the chuck mechanism grips the rotary cylinder is moved downward the chuck mechanism, said first actuator in a state in which the chuck mechanism is opened the rotary cylinder It is preferable to raise the chuck mechanism. According to such a preferable configuration, the excavation work can be efficiently performed by repeating this operation.
[0012]
In the pile removing apparatus of the present invention, it is preferable that the chuck mechanism performs a gripping / opening switching operation with respect to the rotating cylinder in a state where the chuck mechanism is rotated by the rotational driving force. According to such a preferable configuration, it is not necessary to stop the rotation of the chuck mechanism for the grip / release switching operation, so that the working efficiency is improved. Further, waste of energy due to repeated rotation / stop of the chuck mechanism can be eliminated.
[0013]
Further, the pile punching device of the present invention, the plurality of chuck bands, wherein arranged so as to surround the outer circumferential surface of the rotary cylinder, preferably a pair of substantially semi-circular chucks band. Thereby, a chuck mechanism can be realized with a simple configuration. In addition, a chuck mechanism that can accommodate a plurality of rotating cylinders having different outer diameters can be realized.
[0014]
In the pile removing apparatus according to the present invention, it is preferable that the pile source further includes a lifting table on which the power source and the chuck mechanism are mounted, and the first actuator moves the lifting table up and down. According to such a preferable configuration, the transmission system of the rotational driving force can be easily configured. Further, as the driving force in the excavation direction, the weight of the lifting table and the load on it can be used.
[0015]
Below, an example of preferable embodiment of the pile removal apparatus of this invention is demonstrated in detail.
[0016]
FIG. 1 is a side view of a pile removing apparatus according to an embodiment of the present invention.
[0017]
In FIG. 1, 10 is a pile embedded in the ground to be pulled out. Reference numeral 110 denotes a base of a pile removing device fixed on the ground. The base 110 is formed with an opening 112 through which the pile 10 is exposed and through which the hollow rotating cylinder 302 constituting the excavation part 300 penetrates.
[0018]
A lifting table 120 is installed on the base 110 via a first actuator 114 such as a hydraulic cylinder. Due to the expansion and contraction of the first actuator 114, the lifting table 120 can be lifted and lowered in the direction of the arrow 120a.
[0019]
A flange 200 is rotatably attached to an opening 122 provided in the lifting table 120 via a bearing 124. The bearing 124 supports loads in the radial direction and the thrust direction.
[0020]
Further, a motor (auger) 130 is mounted on the lifting table 120 via an attachment 126. A pulley 132 is coupled to the tip of the rotating shaft of the motor 130. Gears are formed on the outer peripheral surfaces of the pulley 132 and the flange 200, and a chain 134 is bridged between these gears. As a result, the rotational driving force of the motor 130 is transmitted to the flange 200 via the chain 134.
[0021]
A through hole 204 is formed at the center of the flange 200, and the rotating cylinder 302 is loosely passed through the through hole 204. A chuck mechanism for holding / releasing the outer peripheral surface of the rotary cylinder 302 is attached to the flange 200.
[0022]
The structure of the chuck mechanism will be described with reference to FIGS. 2 (A) and 2 (B). 2A is a side view of the chuck mechanism, and FIG. 2B is a cross-sectional view taken along line 2B-2B in FIG.
[0023]
As shown in FIG. 2B, the chuck mechanism includes a pair of substantially semicircular chuck bands 210 and 210 disposed so as to surround the outer peripheral surface of the rotating cylinder 302. A chuck operation piece 212 protruding outward is attached to both ends of each chuck band 210. Such a chuck band 210 can be created by cutting out a steel pipe into a predetermined shape, for example, and attaching chuck operation pieces 212 to both ends thereof by welding.
[0024]
The pair of chuck bands 210, 210 are arranged such that the circular arc part sandwiches the rotating cylinder 302 and the chuck operation piece 212 sandwiches the pair of band fixtures 206 fixed to the flange 200.
[0025]
Through-holes in the horizontal direction are formed in the chuck operation pieces 212 and 212 facing each other with the band fixture 206 interposed therebetween. The connecting rod 220 is inserted into the through hole. After the compression coil spring 222 is inserted from both ends of the connecting rod 220, stoppers 224 are attached to both ends of the connecting rod 220. As a result, an urging force in a direction approaching each other is applied to the opposing chuck operation pieces 212, 212 by the elastic force of the compression coil spring 222. With this urging force, the pair of chuck bands 210 and 210 fasten the rotating cylinder 302 with a strong force.
[0026]
The band fixture 206 provided between the opposing chuck operation pieces 212 and 212 has a substantially T-shape as shown in FIG. The band fixture 206 transmits the rotational driving force transmitted to the flange 200 to the chuck bands 210 and 210 and prevents the chuck bands 210 and 210 from floating from the flange 200. The rotating cylinder 302 rotates integrally with the flange 200 by the frictional force generated by the clamping force of the chuck bands 210 and 210 against the rotating cylinder 302.
[0027]
As shown in FIG. 2A, a link holding portion 214 is attached to the upper surface of each chuck operation piece 212. A link mechanism 230 combined in an X shape is attached to the link holding portions 214 and 214 on the chuck operation pieces 212 and 212 facing each other with the band fixture 206 interposed therebetween. More specifically, the lower ends of a pair of rod-like arms 232 and 232 constituting the link mechanism 230 are rotatably attached to the link holding portions 214 and 214. A pulley 234 is rotatably attached to the upper end of the arm 232.
[0028]
As shown in FIG. 1, a thrust plate 240 is installed on the lifting table 120 via a second actuator 244 such as a hydraulic cylinder. Due to the expansion and contraction of the second actuator 244, the thrust plate 240 can be moved up and down in the direction of the arrow 240a. An opening 242 is formed substantially at the center of the thrust plate 240, and the rotary cylinder 302 passes through the opening 242.
[0029]
When the thrust plate 240 is lowered in the arrow 240b direction in FIG. 2A by the second actuator 244, the lower surface of the thrust plate 240 pushes down the pulley 234. This push-down force acts as a force in the direction of the arrow 210 a on the link holding portions 214 and 214 connected to the lower ends of the pair of arms 232 and 232 by the action of the link mechanism 230, contrary to the urging force of the compression coil spring 222. Thus, the pair of chuck bands 210 and 210 are separated from the rotary cylinder 302. That is, when the second actuator 244 is driven to lower the thrust plate 240, the pair of chuck bands 210 and 210 open the rotating cylinder 302. Conversely, when the thrust plate 240 is raised, the pair of chuck bands 210 and 210 grip the rotating cylinder 302 by the urging force of the compression coil spring 222. When the thrust plate 240 is lowered, its lower surface comes into contact with a pulley 234 attached to the upper end of the link mechanism 230, so that even when the flange 200 and the pair of chuck bands 210, 210 are rotating, the pair of chuck bands 210. 210, the gripping / releasing operation for the rotating cylinder 302 can be performed.
[0030]
As shown in FIG. 1, the excavation unit 300 includes a steel hollow cylindrical rotary cylinder 302, a suspension part 310 attached to the upper end of the rotary cylinder 302, and a diamond attached to the lower end of the rotary cylinder 302. The excavating blade 320 is provided. The excavation unit 300 is suspended by engaging a hook 404 attached to a wire 402 of a crane (not shown) with the suspension unit 310 at the upper end thereof, and the posture thereof is maintained in a substantially vertical direction. Reference numeral 312 denotes a rotary joint provided in the suspension unit 310, which blocks transmission of the rotary motion of the rotary cylinder 302 to the hook 404.
[0031]
304 is a liquid supply hose, and various fluids 306 are supplied according to a work process. The fluid 306 is guided to the vicinity of the excavating blade 320 by a pipe 308 that passes through the rotary joint 312 and is fixed to the inner wall surface of the rotary cylinder 302. The fluid 306 is, for example, a drilling fluid (for example, water) during the excavation work, and is, for example, a cement solution or a viscous soil when the excavation work is completed and the rotary cylinder 302 is pulled out.
[0032]
Next, the pile removal work procedure using the pile removal apparatus of this embodiment comprised as mentioned above is demonstrated.
[0033]
First, the upper end portion of the pile 10 to be pulled out is exposed to the ground surface, and the pile removing device is installed so that the pile 10 is accommodated in the opening 112 of the base 110. At this time, the excavation part 300 is not yet mounted. In order to prevent the base 110 from rotating or floating with respect to the ground surface due to the reaction force when the rotary cylinder 302 is rotated while rotating in a later process, the base 110 is slightly embedded in the ground. It is preferable to place a weight on the base 110.
[0034]
Next, the second actuator 244 is driven to lower the thrust plate 240, and the pair of chuck bands 210, 210 are separated.
[0035]
Next, the excavation part 300 is lifted with a crane, and the opening 242 of the thrust plate 240, the pair of chuck bands 210 and 210, the through hole 204 of the flange 200, the opening 122 of the lifting table 120, and the opening 112 of the base 110 are formed. It passes through in order and is lowered so that the upper end of the pile 10 fits within the opening at the lower end of the rotating cylinder 302.
[0036]
Next, the second actuator 244 is driven to raise the thrust plate 240, and the rotating cylinder 302 of the excavation unit 300 is held by the pair of chuck bands 210 and 210. Then, the crane is operated to slightly loosen the wire 402. In this way, the excavation unit 300 is held in a substantially vertical direction.
[0037]
The motor 130 is rotated while supplying the digging liquid from the liquid supply hose 304. The rotational driving force is sequentially transmitted to the pulley 132, the chain 134, the flange 200, and the pair of chuck bands 210 and 210 to rotate the rotating cylinder 302. In this state, the first actuator 114 is driven to lower the lifting table 120. While the excavation blade 320 at the lower end of the rotary cylinder 302 excavates the ground, the excavation unit 300 descends together with the lifting table 120.
[0038]
When the lifting table 120 is lowered to the vicinity of the bottom dead center of the stroke of the first actuator 114, the second actuator 244 is driven to lower the thrust plate 240, and the pair of chuck bands 210, 210 are separated. As a result, the rotating cylinder 302 is opened and its rotation stops. However, the flange 200 and the pair of chuck bands 210 and 210 remain rotated. In this state, the first actuator 114 is driven to raise the elevating table 120 to the vicinity of the top dead center of the stroke of the first actuator 114.
[0039]
Thereafter, the second actuator 244 is driven to raise the thrust plate 240, and the pair of chuck bands 210 and 210 holds the rotating cylinder 302 of the excavation unit 300. Thereby, the rotational driving force is transmitted to the rotating cylinder 302, and the rotating cylinder 302 starts to rotate again. In this state, the first actuator 114 is driven to lower the elevating table 120 and resume excavation.
[0040]
Thereafter, the above operation is repeated and the excavation is advanced to a predetermined depth so that the pile 10 is inserted into the rotary cylinder 302. As a result, the earth and sand firmly attached to the periphery of the pile 10 is removed. Then, the excavation part 300 is lifted with a crane and the pile removing device is removed. And the upper end of the pile 10 is hold | gripped and the pile 10 is pulled out using a crane etc. When the excavation part 300 is lifted, if the backfill is performed by supplying cement liquid or viscous soil from the liquid supply hose 304 to the excavation hole, the surrounding ground is prevented from collapsing after the excavation part 300 or the pile 10 is pulled out. This is preferable.
[0041]
As described above, in the pile removing device of the present invention, the rotary cylinder 302 of the excavation unit 300 is gripped by the pair of chuck bands 210 and 210, and these are lowered by the first actuator 114 while rotating the rotary cylinder 302. Dig up. When reaching the vicinity of the bottom dead center of the stroke of the first actuator 114, the pair of chuck bands 210, 210 are opened. Then, after the pair of chuck bands 210 and 210 are raised relative to the rotating cylinder 302 by the first actuator 114, the rotating cylinder 302 is again gripped by the pair of chuck bands 210 and 210, and the excavation is resumed. Thus, by changing the height of the pair of chuck bands 210 and 210 for gripping / releasing the rotating cylinder 302 by the first actuator 114, the gripping position of the pair of chuck bands 210 and 210 with respect to the rotating cylinder 302 is gradually increased. To the upper end side of the rotating cylinder 302. Thus, excavation work is performed intermittently. Vibration and noise associated with excavation are relatively small.
[0042]
A rotary drive mechanism from the motor 130 that generates and transmits a rotary drive force for rotating the rotary cylinder 302 to the pair of chuck bands 210 and 210 is mounted on the lift table 120. That is, since the excavation unit 300 is not equipped with a rotary drive mechanism or an actuator that generates excavation thrust, the excavation unit 300 is similar to the conventional pile removing device disclosed in Japanese Patent Laid-Open No. 2001-164572. The weight of the robot is not increased, and the position of the center of gravity is not increased, so that the maintenance of the upright posture during work is not unstable. Therefore, it is possible to work using a small crane having a relatively small lifting capacity. Further, the weight of the lifting table 120 and the load on the lifting table 120 can be used as a driving force during excavation.
[0043]
The embodiments described above are intended to clarify the technical contents of the present invention, and the present invention should not be construed as being limited to such specific examples. Various modifications can be made within the scope of the technical idea of the invention interpreted from the description, and the present invention should be interpreted broadly.
[0044]
For example, in the pile removing device of the present invention, it is possible to use a rotating cylinder 302 having different dimensions (outer diameter, inner diameter, length) according to the dimensions of the pile 10 to be pulled out. By properly setting the radius of curvature, arc length, strength, etc. of the pair of chuck bands 210, 210, the rotating cylinder 302 having a different outer diameter using the common pair of chuck bands 210, 210 can be reliably obtained. A grip / release operation can be performed.
[0045]
Moreover, although the example which combined two substantially semicircle chuck bands 210 was shown as said chuck mechanism in said embodiment, you may use combining 3 or more chuck bands which shortened the length of the arc.
[0046]
In the above-described embodiment, the gripping / opening switching operation of the rotating cylinder 302 by the pair of chuck bands 210 and 210 can be performed while the pair of chuck bands 210 and 210 themselves rotate, but the work efficiency decreases. May be configured to stop the rotation of the pair of chuck bands 210 and 210 and perform the grip / release switching operation.
[0047]
【The invention's effect】
As described above, according to the present invention, since a heavy object is not provided at the upper end of the rotating cylinder, the weight of rotation or the like is relatively light and the center of gravity is low. Therefore, it is possible to provide a pile removing device that can work using a small crane and excavates around the pile efficiently.
[Brief description of the drawings]
FIG. 1 is a side view of a pile removing apparatus according to an embodiment of the present invention.
2A is a side view of the chuck mechanism of the pile removing apparatus according to one embodiment of the present invention, and FIG. 2B is a cross-sectional view taken along line 2B-2B in FIG. 2A. It is.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Pile 110 Base 112 Base opening 114 First actuator 120 Lifting table 122 Lifting table opening 124 Bearing 126 Attachment 130 Motor 132 Pulley 134 Chain 200 Flange 204 Through hole 206 Band fixture 210 Chuck band 212 Chuck operating piece 214 Link holding part 220 Connecting rod 222 Compression coil spring 224 Stopper 230 Link mechanism 232 Arm 234 Pulley 240 Thrust plate 242 Thrust plate opening 244 Second actuator 300 Excavation portion 302 Rotating cylinder 304 Fluid supply hose 306 Fluid 310 Suspension portion 312 Rotating joint 320 Excavation blade 402 Wire 404 hook

Claims (5)

A hollow rotating cylinder standing in a substantially vertical direction;
A power source that generates a rotational driving force for rotating the rotating cylinder;
A chuck mechanism that performs a gripping / opening switching operation on the outer peripheral surface of the rotating cylinder, and transmits the rotational driving force to the rotating cylinder when the rotating cylinder is gripped;
A first actuator that moves the chuck mechanism in the direction of the rotation axis of the rotary cylinder ;
The chuck mechanism is disposed so as to surround an outer peripheral surface of the rotating cylinder, and a plurality of chuck bands to which an urging force for tightening the rotating cylinder is applied, and the plurality of chuck bands are opposed to the urging force. A pile removing device comprising: a second actuator separated from the rotating cylinder . Wherein said first actuator in a state in which the chuck mechanism grips the rotary cylinder is moved downward the chuck mechanism, said first actuator in a state in which the chuck mechanism is opened the rotary cylinder is claim 1 for raising the chucking mechanism The pile removing device described in 1.   The pile removing device according to claim 1, wherein the chuck mechanism performs a gripping / opening switching operation with respect to the rotating cylinder in a state where the chuck mechanism is rotated by the rotational driving force. Wherein the plurality of chuck bands, wherein arranged so as to surround the outer peripheral surface of the rotating cylinder, pile punching device according to claim 1, wherein a pair of substantially semi-circular chucks band. The pile removing apparatus according to claim 1, further comprising a lifting table on which the power source and the chuck mechanism are mounted, wherein the first actuator moves the lifting table up and down.

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