JP2008044719A - Pole puller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the labor related to carrying-in work and efficiently perform pole pulling work for a short time without using a manual draw gear. <P>SOLUTION: In this pole puller, a string-shaped body 2 is wound around a lower part of a pole 1 erected on the ground along the peripheral face, and a hydraulic cylinder 3 is arranged on the ground around the pole 1. The string-shaped body 2 in the wound state is tightened, and the hydraulic cylinder 3 is driven by a hydraulic unit 11 mounted on a working vehicle 10 carried in a work site. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a post-pillar device used when a pillar having a base end portion embedded in the ground and a telephone line, a power cable, or the like installed on the distal end side is pulled out.

  This type of conventional pillar device is, for example, a rectangular parallelepiped hollow body installed on the ground, a pillar provided on the hollow body so as to be movable up and down, and a pillar that is fixed to the lower end of the pillar and advances. Is prevented from coming out of the hollow body, a pulley provided on the lower end surface of the column, a column support member fixed to the upper end of the column, and provided on the column support member, An arm to which an abutting portion that abuts a part of the circumferential surface of the column (arc surface) is attached; a support (chain) that is hooked on both ends of the arm and wound around the circumferential surface of the column; A traction machine externally attached to the upper part of the hollow body, and one end thereof is opposite to the traction machine and is fixed to the upper part inside the hollow body, and the middle part is stretched over the pulley of the column. The other end is provided with a transmission medium (chain or wire rope) wound around the winding drum of the traction machine. There has been known (see Patent Document 1).

In the standby state, the transmission medium is V-shaped. When the traction machine is driven from this state and the other end portion of the transmission medium is wound up, the transmission medium is pulled and becomes linear. To do. As a result, the column is pushed up and raised, and the column support member and the support are also raised, and the column is pulled upward as they rise.
Japanese Patent Laid-Open No. 10-219689

  However, the above-described conventional column pulling apparatus has a problem that it requires a lot of labor and time because a transmission medium for raising and lowering the column is wound up by a manual traction machine.

  In order to solve this problem, it may be possible to carry out the pillar work by bringing the hydraulic cylinder into the work site. However, when the hydraulic cylinder is carried in, the hydraulic unit for driving the hydraulic cylinder must also be carried in separately. There is a problem that the carrying-in work becomes large.

  Therefore, in view of the above problems, the present invention can reduce the labor involved in the carry-in work without using a manual traction machine, and can perform the pull-out work efficiently and in a short time. An object of the present invention is to provide a pillar device.

  By the way, when pulling out a pole (telephone pole) on which a telephone line or power cable is installed, the telephone line or power cable is also removed. Work vehicle etc. are carried in. These work vehicles are equipped with an outrigger for improving stability during work and a hydraulic unit for driving the outrigger. In order to solve the above-mentioned problems, the present invention is intended to improve the efficiency of the pillar work by effectively using the hydraulic unit mounted on the work vehicle.

  That is, the pulling column apparatus according to the present invention includes a string-like body 2 wound around a peripheral surface of a column 1 standing on the ground, and a hydraulic cylinder 3 disposed on the ground around the column 1. The string-like body 2 has both ends engaged with the cylinder body 4 or the piston rod 5 of the hydraulic cylinder 3 to be moved up and down, and can clamp the column 1. The hydraulic cylinder 3 It is characterized by being driven by a hydraulic unit 11 mounted on a work vehicle 10 carried into the site.

  In this case, since the hydraulic unit 11 of the work vehicle 10 carried into the work site is used as the drive source of the hydraulic cylinder 3, it is only necessary to carry the hydraulic cylinder 3 to the ground around the pillar 1 and The labor of a person is reduced. In addition, since a manual traction machine is not used in the post-pillar work as in the prior art, the labor and work time of the operator is greatly reduced.

  And the string-like body 2 wound along the peripheral surface is fastened to the lower part of the pillar 1, so that the upward force at the time of pulling out the string-like body 2 at the winding position of the string-like body 2. The base 1 of the column 1 is pulled out from the ground and separated by the rising of the cylinder body 4 or the piston rod 5, and the column 1 is released from the cylinder body 4 or the piston rod. In accordance with the further rise of 5, it moves upward, and the base end of the pillar 1 is pulled out from the ground, that is, pulled out.

  Here, the pillar 1 is not limited to a power pole on which a telephone line or a power cable is installed, but may also be a pillar of a building structure or a temporary pole for construction. In this case as well, it goes without saying that a hydraulic unit mounted on a crane vehicle or an aerial work vehicle carried into the work site can be used as described above.

  Further, according to the present invention, the cylinder body 4 or the piston rod 5 to be moved up and down is such that the wound portion of the string-like body 2 wound along the peripheral surface of the column 1 is forced in the radial direction of the column 1. In order to generate the above, it is possible to employ a configuration including a fastening means 20 capable of pulling at least one end of the string-like body 2 toward the hydraulic cylinder 3 side.

  For example, one end of the string-like body 2 may be fixed to the cylinder body 4 or the piston rod 5 and the other end may be wound around the cylinder body 4 or the piston rod 5. You may make it take. In any case, the string-like body 2 drawn into the hydraulic cylinder 3 side is not loosened in the string-like body 2 wound around the peripheral surface of the column 1 and is pulled out at the wound position. You will be able to concentrate the power of the occasion.

  In addition, as a thing which winds up the edge part of the string-like body 2, it is good to use a sprocket and a winding drum. Moreover, the string-like body 2 here includes a chain, a belt, a rope, a wire, and the like.

  Moreover, according to this invention, it is between the lower part of the column 1 in the state by which the string-like body 2 was wound, and the cylinder main body 4 or the piston rod 5 which is going to raise / lower, The winding of the string-like body 2 Upright position for preventing rattling of the column 1 with respect to the cylinder body 4 or the piston rod 5 to be moved up and down to a position straddling the position vertically or above and below the winding position of the string-like body 2 A configuration in which the holding member 30 is arranged may be employed.

  In this case, although the shape and material of the upright holding member 30 are not limited, rattling of the column 1 with respect to the cylinder body 4 or the piston rod 5 can be prevented from the start to the end of the column extraction, and the column 1 does not tilt. That is, it is an essential requirement that the column 1 and the cylinder body 4 have a shape and strength that can maintain an interval in which the column 1 and the cylinder body 4 are in an upright state. Therefore, for example, the cross-sectional shape may be a rectangle, a trapezoid, or a concave arcuate surface that follows the peripheral surface of the column 1, and the material may be any of rubber, wood, metal, and hard resin. .

  Further, the number of the upright holding members 30 is not limited, and for example, a single upright holding member 30 may be arranged so as to straddle the winding position of the string-like body 2 up and down. The holding member 30 may be disposed above and below the winding position of the string-like body 2.

  That is, the upright holding member 30 does not rattle the column 1 with respect to the cylinder main body 4 or the piston rod 5 from the start to the end of the extraction, and the distance between the upright column 1 and the cylinder main body 4 is maintained. The column 1 is pulled out in a state where the column 1 is maintained in a substantially vertical direction (upright state). However, as the base end portion of the pillar 1 fixed to the ground is pulled out from the ground, the balance of the center of gravity of the pillar 1 tends to collapse. Therefore, it is preferable that the upper end portion of the column 1 is suspended by a crane, and the column 1 is pulled out while the upper end portion of the column 1 is lifted upward in response to the upward movement of the piston rod 5 or the cylinder body 4. Then, the pillar 1 can be pulled out smoothly and reliably from the start to the end of the extraction.

  Further, according to the present invention, the hydraulic cylinder 3 may be configured to be detachable from the outrigger extension frame 12 provided in the work vehicle 10 so that it can also be used as the outrigger of the work vehicle 10.

  In this case, when performing a predetermined work at the work site, it can be used as an outrigger for stably supporting the work vehicle 10, and when the predetermined work is completed, it can be removed and used as the hydraulic cylinder 3 of the pillar device. . In addition, since the work vehicle 10 on which the hydraulic unit 11 is mounted and the hydraulic cylinder 3 for the stable support and pull-out column can be integrally carried into the site, it is simpler.

  As described above, according to the present invention, since the hydraulic cylinder is used, it is not necessary to use a manual traction machine as in the conventional case. In addition, since the hydraulic cylinder is driven by a hydraulic unit mounted on a work vehicle that is carried into the work site, there is no need to separately carry the hydraulic unit into the work site. Therefore, since the column can be pulled out without taking time, work efficiency can be greatly improved.

Hereinafter, the configuration of a pillar device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
As a pillar to be extracted by the extraction apparatus of the present embodiment, a pillar (electric pole) on which a telephone line, a power cable and the like are installed will be described as an example. As shown in FIG. 1 and FIG. 2, the extraction pole device includes a chain 2 as a string-like body wound around a peripheral surface of a pole (electric pole) 1 whose base end is embedded in the ground, and a pillar 1. A hydraulic cylinder 3 disposed on the ground around the vehicle, a work vehicle 10 to be carried into a work site where a telephone line, a power cable and the like are removed and a pillar work, and a chain 2 provided in the hydraulic cylinder 3 It comprises a fastening means 20 for fastening and an upright holding member 30 provided between the column 1 and the hydraulic cylinder 3 for preventing rattling.

  One end of the chain 2 is provided with a hook 2a that is hooked to a locking ring 6 of a cylinder body 4 described later, and the other end is wound around a cylindrical sprocket 21 of a tightening means 20 described later. Yes. The length of the chain 2 has a length that can be wound about 3 to 5 times below the pillar 1.

  As shown in FIG. 3, the hydraulic cylinder 3 includes a cylinder body 4 having a substantially rectangular tube shape, and a columnar piston rod 5 provided on the cylinder body 4 so as to be movable forward and backward. A case 24 of the fastening means 20 described later is attached to one side of the upper portion of the cylinder body 4, and a locking ring 6 to which the hook 2a of the chain 2 is hooked is fixed to the other side. On the other hand, a support base 5a for stably supporting the cylinder body 4 with respect to the ground is fixed to the tip of the piston rod 5. That is, the hydraulic cylinder 3 is arranged in an upright state on the ground around the pillar 1 via the support base 5a, and the piston rod 5 moves forward and backward by pressure oil supply from a hydraulic unit 11 described later, so that the cylinder body 4 Will go up and down.

  The work vehicle 10 includes an arm configured to be extendable and retractable, a hydraulic cylinder for extending and retracting the arm, a crane and a boarding bucket provided at the tip of the arm, an outrigger for stably supporting the vehicle body, and the like. A hydraulic unit 11 for driving a hydraulic cylinder for arm expansion and contraction and an outrigger is mounted. Then, after the telephone lines and power cables installed on the pillar 1 are removed by the plurality of work vehicles 10, the work vehicle 10 that suspends and supports the upper end portion of the pillar 1 and the hydraulic cylinder 3 are pressurized with oil. Pillar work is performed by the work vehicle 10 for supply.

  As shown in FIG. 3, the fastening means 20 includes a sprocket 21 meshing with the ring of the chain 2, a rotating shaft 23 a meshed with a support shaft 22 of the sprocket 21 via a reduction mechanism (not shown), and the rotating A motor 23 that rotates the shaft 23a forward and backward and a case 24 attached to the other side of the piston rod 5 are provided. The case 24 accommodates the sprocket 21 and the motor 23 and accommodates the other side of the wound chain 2.

  Then, when the hook 2a of the chain 2 wound around the lower portion of the column 1 is hooked on the locking ring 6 of the cylinder body 4, the sprocket 21 is rotated and the other end side of the chain 3 is wound up. The both ends of the chain 2 are drawn in the tangential direction with respect to the peripheral surface of the column 1 and toward the hydraulic cylinder 3, so that the chain 2 is in a tension state and a tightening force is applied in the radially inward direction of the column 1. Become standby.

  The upright holding member 30 is made of rubber and has a vertically long rectangular parallelepiped shape having a size that straddles the winding position of the chain 2. The upper end of the upright holding member 30 is higher than the upper end of the cylinder body 4. The lower end portion is located at the lower portion of the cylinder body 4.

  Since the upright holding member 30 is made of rubber, the chain 2 is tightened so that it is pressed against the peripheral surface of the column 1 and the cylinder body 4 and is slightly deformed (see FIG. 2). The cylinder body 4 has a hardness that can be maintained in an upright state. Therefore, the column 1 does not rattle with respect to the cylinder body 4 from the start to the end of the extraction, and the upright state of the column 1 and the cylinder body 4 is maintained.

  On the other hand, as the pillar 1 is pulled upward, the balance of the center of gravity becomes unstable, so that the upper end of the pillar 1 is suspended by a crane. That is, the pillar 1 is supported at two points by the hydraulic cylinder 3 and the crane. As a result, the column 1 can be pulled out smoothly in the vertical direction.

  Next, the usage mode will be described. First, the hydraulic cylinder 3 is installed around the pillar 1 and the upper end of the pillar 1 is supported by a crane truck so that the pillar 1 does not fall. And the upright holding member 30 is arrange | positioned supposing the position so that the upright holding member 30 may straddle the winding position of the chain 2 up and down between the pillar 1 and the hydraulic cylinder 3. In other words, the upright holding member 30 is provided so that the upper end portion is located above the upper end portion of the cylinder body 4 and the lower end portion is located below the cylinder body 4.

  Subsequently, one end portion of the chain 2 led out from the tightening means 20 is pulled and pulled out to a predetermined length, that is, to the extent that the peripheral surface of the column 1 can be wound, and the chain 2 is placed about 3 to 5 times below the column 1. To hook the hook 2 a of the chain 2 on the locking ring 6 of the hydraulic cylinder 3.

  Next, the motor 23 of the tightening means 20 is driven to rotate the sprocket 21 to wind up the other end side of the chain 2 and tighten the chain 2 to be in a tension state. At this time, as shown in FIG. 2, the upright holding member 30 has an abutment surface that abuts on the peripheral surface of the column 1 and is pressed into contact with the chain 2 to be deformed into a concave shape. The member 30 can prevent rattling with respect to the cylinder body 4 and can maintain an interval at which the pillar 1 and the cylinder body 4 can be maintained in an upright state.

  Thereafter, hydraulic oil is supplied from the hydraulic unit 11 of the work vehicle 10 to the hydraulic cylinder 3 to raise the cylinder body 4, and correspondingly, the upper end of the column 1 is lifted to a higher position by a crane. Is pulled out so that it is always perpendicular to the ground.

  As described above, according to the pull-out column device according to the present embodiment, the hydraulic cylinder 3 is used, so that there is no need to use a manual traction machine as in the prior art, and the work vehicle 10 carried into the work site. Since the hydraulic cylinder 3 is driven by the hydraulic unit 11 mounted on the vehicle, there is no need to separately carry a hydraulic unit for the hydraulic cylinder 3 to the work site. Therefore, since the column can be pulled out without taking time, work efficiency can be greatly improved.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  For example, the column pulling operation is performed by one hydraulic cylinder 3, but as shown by the chain line in FIG. 1 and FIG. 2, the two hydraulic cylinders 3 and 3 are provided at opposing positions to perform the column pulling operation. It may be. At this time, it is preferable to provide a pair of upright holding members 30 at the opposing positions between the hydraulic cylinders 3 and 3 and the peripheral surface of the column 1. By doing so, it becomes easy to maintain the pillar 1 in an upright state, and it becomes easier to pull out the pillar. Of course, the number is not limited to two, and a plurality of hydraulic cylinders 3, etc., such as three, may be employed.

  Further, as shown in FIG. 4 (a), a through hole 7 into which the outrigger extension frame 12 of the work vehicle 10 can be inserted is formed in the cylinder body 4, and a retaining pin 8 is provided through the extension frame 12. Or a mounting hole in which the base portion of the cylinder body 4 can be inserted and removed is formed in the lower surface of the outrigger extension frame 12 of the work vehicle 10 and penetrated through the side wall of the mounting hole. By attaching a plurality of bolts so as to be screwed into screw holes formed in the cylinder body 4, the hydraulic cylinder 3 can be used as an outrigger of the work vehicle 10.

  Further, in the case of the above embodiment, the upright holding member 30 having a substantially rectangular parallelepiped shape is provided. However, the upright holding member 30 having an inclined surface in the direction opposite to the taper of the column 1 along the peripheral surface of the column 1. May be provided.

  In addition, in the case of the above embodiment, the single upright holding member 30 is provided so as to straddle the winding position of the chain 2, but as shown in FIG. You may do it. Further, the chain 2 may be engaged with the piston rod 5 instead of being engaged with the cylinder body 4.

  In addition, since the column 1 has a slight taper, the chain 2 should not slide above the column 1 due to the tightening force. If there is such a concern, the chain 2 is folded back as shown in FIG. An intervening member 31 may be disposed between the portion (winding portion of the string-like body 2) and the pillar 1. That is, like the upright holding member 30, the interposition member 31 has at least an outer surface that is a vertical surface (a surface that is orthogonal to the tightening direction of the string-like body 2) when brought into contact with the column 1 having a slight taper. Therefore, the chain 2 is prevented from slipping above the column 1 due to the tightening force.

It is a figure of the apparatus which shows the pillar extraction apparatus which concerns on one Embodiment of this invention, and raises / lowers a cylinder main body and performs pillar extraction operation | work. FIG. 2 is a plan sectional view of a main part of FIG. 1. It is a side view which shows the hydraulic cylinder with which the case of the clamping means was attached. (A) and (B) are views showing a state in which a hydraulic cylinder is detachably attached to an outrigger extension frame of a work vehicle. It is a figure of the extraction pillar apparatus which raises / lowers a piston rod. (A), (b) is a figure which shows the state which arrange | positions an interposed member on the opposite side to the drawing-in direction of a chain.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Column, 2 ... Chain (string-like body), 2a ... Hook, 3 ... Hydraulic cylinder, 4 ... Cylinder main body, 5 ... Piston rod, 5a ... Support stand, 6 ... Locking ring, 7 ... Through-hole, 8 ... Retaining pin, 10 ... Work vehicle, 11 ... Hydraulic unit, 12 ... Overhang frame, 20 ... Tightening means, 21 ... Sprocket, 22 ... Support shaft, 23 ... Motor, 23a ... Rotating shaft, 24 ... Case, 30 ... Upright Holding member, 31 ... intervention member

Claims (4)

  A string-like body (2) wound around a peripheral surface at a lower portion of a pillar (1) standing on the ground, and a hydraulic cylinder (3) arranged on the ground around the pillar (1) The string-like body (2) has both ends engaged with the cylinder body (4) or the piston rod (5) of the hydraulic cylinder (3) to be moved up and down and can tighten the column (1). The above-described hydraulic cylinder (3) is driven by a hydraulic unit (11) mounted on a work vehicle (10) carried into a work site.   The cylinder body (4) or piston rod (5) to be moved up and down is such that the wound portion of the string-like body (2) wound along the peripheral surface of the column (1) is within the diameter of the column (1). 2. A pole post device according to claim 1, further comprising a fastening means (20) capable of pulling at least one end of the string-like body (2) toward the hydraulic cylinder (3) in order to generate a force in the direction. .   Between the lower part of the column (1) in a state where the string-like body (2) is wound and the cylinder body (4) or the piston rod (5) to be moved up and down, the string-like body (2) The column (1) with respect to the cylinder body (4) or the piston rod (5) to be moved up and down to a position straddling the winding position of the upper and lower sides or a position above and below the winding position of the string-like body (2) 3. The pole post device according to claim 1, wherein an upright holding member (30) for preventing rattling is disposed.   The hydraulic cylinder (3) is attachable to and detachable from an outrigger extension frame (12) provided on the work vehicle (10) so that the hydraulic cylinder (3) can also be used as an outrigger of the work vehicle (10). The pole post device according to any one of the above.

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