JP2020089192A - Temporary support pole, telephone pole rebuilding support device, and telephone pole rebuilding method - Google Patents

Abstract

To provide a temporary support pole that can be easily installed regardless of the state of a structure and can hold and move the structure, a telephone pole rebuilding support device, and a telephone pole rebuilding method.SOLUTION: A temporary support pole 10 includes an outer pipe 11 extending in the radial direction so as to face each other, and provided with a pair of projections 11a that can be held by a holding tool provided at the tip of a crane, a middle tube 12 that is arranged inside the outer pipe 11 and that can be pulled out in the longitudinal direction from the tip of the outer pipe 11, and a base 14 that is connected to the base end of the outer pipe 11 and supports the outer pipe 11 so that the outer pipe 11 can swing.SELECTED DRAWING: Figure 2

Description

The present invention relates to a temporary support pole, a telephone pole rebuilding support device, and a telephone pole rebuilding method.

When rebuilding a utility pole, a new utility pole may be rebuilt at the position of an existing utility pole in consideration of the situation of roads and surrounding buildings. In this case, a temporary pole is built adjacent to the existing utility pole, the overhead wire is temporarily moved to the temporary pole, the existing utility pole is removed, a new utility pole is built, and the overhead wire temporarily moved to the temporary pole is replaced with the new utility pole. It is common to use the construction method of relocating to.

To install a temporary pole, it is necessary to dig a hole in the ground adjacent to the existing utility pole, but dig a hole in the ground depending on the situation of underground buried objects such as water and sewers and gas pipes, and the opposition of neighboring residents. Can be difficult. Therefore, development of a construction method for installing a temporary pole adjacent to an existing utility pole without digging a hole in the ground is underway. For example, Non-Patent Document 1 discloses a method of installing a temporary column at a predetermined position by supporting the weight of a vehicle body such as a truck without digging a hole in the ground.

"Old position rebuilding column car, TEPCO PG to be rolled out company-wide/temporary column installation made easy", [online], November 8, 2018, Nippon Electric Association Newspaper Department, [2018 November March 19th search], Internet <URL: https://www.denkishimbun.com/archives/34448>

In the construction method of Non-Patent Document 1, the temporary column cannot be expanded and contracted in a built state, and it is necessary to relocate the overhead wire object by the temporary arm of the aerial work vehicle at a place through which the high-voltage line passes. For this reason, the applicable area of the construction method is limited, and it cannot be applied to, for example, a distribution area of high-voltage lines, a passage area of two high-voltage lines, a triangular wiring, or the like. In addition, since the upper part of the temporary pole is gripped by the tip of the crane boom, the crane boom becomes a hindrance when working with aerial work vehicles, and various types of work such as moving overhead wires, attaching and removing arms, cutting existing utility poles, etc. Work may be difficult. Furthermore, it is difficult to reduce the cost of the device because a special vehicle dedicated to the temporary column is required.

The present invention has been made based on such a background, and can be easily installed regardless of the state of the erected structure, and can temporarily hold or move the erected object, a utility pole rebuilding support device, and a utility pole builder. The purpose is to provide a replacement method.

In order to achieve the above object, the temporary support pillar according to the first aspect of the present invention is
A first pipe provided with a pair of protrusions that extend in the radial direction so as to face each other and that can be gripped by a gripping tool provided at the tip of the crane;
A second tube that is disposed inside the first tube and that can be pulled out in a longitudinal direction from a tip portion of the first tube;
A base connected to the base end of the first pipe and supporting the first pipe so as to be swingable;
Equipped with.

The first tube comprises a slit extending in the longitudinal direction,
The second pipe extends in a radial direction from a base end portion thereof, has a locking hole capable of locking a hook of a crane, and protrudes from the slit to the outside of the first pipe and moves in the slit. A possible hook may be provided.

The first tube includes a central hole formed so as to extend in a longitudinal direction from a base end surface,
The base includes a base body that is installed on the ground, and an insertion portion that is swingably supported with respect to the base body and that can be inserted into the center hole.
The insertion portion may be fixed to the first tube by a lock pin when the insertion portion is inserted into the center hole.

A third tube having a tip formed of an insulating material, disposed inside the second tube, and capable of being pulled out in the longitudinal direction from the tip of the second tube;
Both the first pipe and the second pipe may be made of steel.

In order to achieve the above object, a utility pole rebuilding assistance device according to a second aspect of the present invention is
A temporary support column that is expandable and contractable in the longitudinal direction and includes a pair of protrusions that extend in the radial direction so as to face each other
A crane in which a temporary support column gripping tool capable of gripping the pair of protrusions is attached to a tip end portion of a boom that can be expanded and contracted in the longitudinal direction,
An overhead wire object gripping tool that is provided at the tip of the temporary support column and that can hold an overhead wire object,
Equipped with.

The temporary support pillar gripper is
A crane mounting portion mounted on the tip of the boom,
A temporary support column gripping portion that is rotatably supported around a rotation axis that extends in a direction intersecting the longitudinal direction of the boom with respect to the crane mounting portion, and that sandwiches each of the pair of protrusions from both sides in the radial direction,
May be provided.

The temporary support column gripping portion may include a pair of hooks provided on both side surface portions thereof, extending from the both side surface portions so as to face each other, and capable of locking a sling for lifting the temporary support column.

The temporary support column includes a first tube including the pair of protrusions, and a second tube that is disposed inside the first tube and that can be pulled out in a longitudinal direction from a tip end portion of the first tube. And
The crane includes a winch capable of paying out and winding the wire,
An end of the wire may be locked to the second tube, and the second tube may be moved in the longitudinal direction with respect to the first tube in response to movement of the winch.

In order to achieve the above object, a utility pole rebuilding method according to a third aspect of the present invention is
With the base end of the temporary support pillar in contact with the ground, a step of lifting the temporary support pillar with a crane,
By holding a pair of projections provided at the tip of the temporary support pillar and extending in the radial direction so as to face each other with an overhead wire object gripping tool attached to the tip of the crane, the temporary support pillar is grounded. The step of installing so as to extend in a substantially vertical direction,
A step of transferring the overhead wire object erected on the existing utility pole to the temporary support pole installed on the ground;
Removing the existing utility pole from the ground,
A step of building a new utility pole at the position where the removed existing utility pole was installed on the ground;
A step of relocating the overhead wire object that has been relocated to the temporary support pole to the new utility pole built in the ground;
Removing the temporary support columns installed on the ground,
including.

According to the present invention, it is possible to provide a temporary support pole, a utility pole rebuilding support device, and a utility pole rebuilding method that can be easily installed regardless of the state of a building and can hold and move an overhead wire.

It is a figure which shows the structure of the telephone pole rebuilding assistance apparatus which concerns on embodiment of this invention. (A) is a front view which shows the structure of the temporary support pillar which concerns on embodiment of this invention, (b) is a side view which shows the structure of the temporary support pillar which concerns on embodiment of this invention. (A) is a figure showing a state where a middle pipe and an inner pipe concerning an embodiment of the present invention can expand and contract, and (b) shows a middle pipe and an inner pipe concerning an embodiment of the present invention. It is a figure showing a locked state, and (c) is a figure showing a part of composition of an inner pipe concerning an embodiment of the invention. It is sectional drawing which cut|disconnected the outer tube by which a part of base based on embodiment of this invention was inserted in the longitudinal direction. (A) is a figure which shows the structure of the base which concerns on embodiment of this invention, (b) is a figure which shows a mode that the base and outer tube which concern on embodiment of this invention were connected. .. It is a figure showing composition of a high voltage wire grasper concerning an embodiment of the invention. It is a figure which shows the structure of the crane which concerns on embodiment of this invention. (A) is a top view which shows the structure of the temporary support pillar gripper which concerns on embodiment of this invention, (b) is a side surface which shows the structure of the temporary support pillar gripper which concerns on embodiment of this invention. It is a figure. (A)-(h) is a figure which shows each process of the telephone pole rebuilding work which concerns on embodiment of this invention. It is a figure which shows a mode that the telephone pole rebuilding assistance apparatus which concerns on embodiment of this invention is applied to the through location of two high voltage lines. It is a figure which shows a mode that the telephone pole rebuilding assistance apparatus which concerns on embodiment of this invention is applied to high voltage vertical wiring.

Embodiments of a temporary support pole, a telephone pole rebuilding support device, and a telephone pole rebuilding method according to the present invention will be described below in detail with reference to the drawings. In the drawings, the same or equivalent parts are designated by the same reference numerals.

The “ground” in the embodiments includes all surfaces on which temporary pillars can be installed, such as a surface paved with concrete or asphalt, or a surface composed of buildings or structures.

With reference to FIG. 1, an overall configuration of a telephone pole rebuilding assistance device 1 according to an embodiment will be described. FIG. 1 is a front view showing the configuration of a telephone pole rebuilding support device 1.

The utility pole rebuilding support device 1 installs the overhead line objects such as the high voltage line, the low voltage line and the communication line supported and installed on the existing utility pole at the position where the existing utility pole was installed before removing the existing utility pole. Until this is done, it is a device that will be temporarily relocated to a position that does not interfere with the removal of existing electric wires or the installation of new electric poles.

The utility pole rebuilding support device 1 includes a temporary support column 10 that is expandable/contractible in the length direction, and a high-voltage wire gripping tool 20 that is attached to the tip end of the temporary support pillar 10 and that grips a high-voltage wire that is an overhead wire (an overhead wire gripping object). And a crane 30 for supporting the tip of the temporary support column 10 so that the temporary support column 10 extends in a substantially vertical direction with respect to the ground, and for expanding and contracting the temporary support column 10. At the tip of the crane 30, a temporary support pillar gripper 40 for gripping the tip of the temporary support pillar 10 is provided.

The utility pole rebuilding support device 1 holds the temporary support pillar 10 with the temporary support pillar gripping tool 40, grips the high voltage wire laid on the existing utility pole with the high voltage wire gripping tool 20, and then temporarily uses the crane 30 to hold the high voltage wire. By extending the support pillar 10 in the longitudinal direction, the high-voltage wire gripped by the high-voltage wire gripper 20 can be retracted to a position that does not hinder the replacement work of the electric pole. The existing utility pole can be removed and a new utility pole can be installed while the overhead line including the high voltage line is being evacuated.

Next, the configuration of the temporary support column 10 will be described with reference to FIG. FIG. 2A is a front view showing the configuration of the temporary support column 10, and FIG. 2B is a side view showing the configuration of the temporary support column 10. In FIG. 2, the hooks 11f and 11g of the outer tube 11 are not shown.

The temporary support column 10 includes an outer pipe 11 (first pipe), an inner pipe 12 (second pipe) arranged inside the outer pipe 11 and movable in the longitudinal direction with respect to the outer pipe 11. An inner pipe 13 (third pipe) that is disposed inside the pipe 12 and is movable in the longitudinal direction with respect to the middle pipe 12, and is detachably connected to the base end portion of the outer pipe 11 to connect the outer pipe 11 to the neck. And a base 14 that supports swingably.

The outer pipe 11, the middle pipe 12, and the inner pipe 13 are all cylindrical pipes. The inner diameter of the outer pipe 11 is slightly larger than the outer diameter of the middle pipe 12, and the inner diameter of the middle pipe 12 is slightly larger than the outer diameter of the inner pipe 13. The tip of the middle tube 12 can be pulled out from the tip of the outer tube 11, and the tip of the inner tube 13 can be pulled out from the tip of the middle tube 12. Since the outer pipe 11, the middle pipe 12, and the inner pipe 13 are arranged in a nested manner with respect to each other, the temporary support column 10 is configured to be expandable and contractable in the longitudinal direction.

The outer pipe 11 and the middle pipe 12 need to be rigid enough not to buckle, and are therefore made of steel. On the other hand, the inner tube 13 is formed of an insulating material such as Fiber Reinforced Plastics (FRP), for example, at least the tip end portion of the inner tube 13 in order to block the current from the high voltage line. Since at least the tip of the inner pipe 13 is made of an insulating material, the inner pipe 13 can be brought close to a narrow high-voltage line or a triangular wiring.

The outer tube 11 includes a pair of protrusions 11a extending in the radial direction from the tip end portion so as to face each other, and a slit 11b penetrating the wall surface and extending in the longitudinal direction.

Each of the pair of protrusions 11 a is formed in a columnar shape so that the temporary support column grasping tool 40 can grasp the pair of protrusions 11 a.

The slit 11b is formed so as to be able to receive the hook 12a of the middle tube 12, and the hook 12a is movable in the longitudinal direction (vertical direction), but is regulated so as not to rotate about the axis.

Returning to FIG. 1, a pair of hooks 11f capable of locking the hooks of the sling 45 suspended from the hooks 44 of the temporary support column gripping tool 40 are located near the middle portion of the outer pipe 11 at positions radially opposite to each other. It is provided. The hook 11f is locked to the hook of the sling 45 when the temporary support column 10 is suspended by a crane. The sling 45 is a string formed in a ring shape, and a hook is provided at the tip thereof.

The outer pipe 11 is provided below the hooks 11f and at a position facing each other in the radial direction, and further includes a pair of hooks 11g capable of locking the hooks of the sling 45. The hook 11g locks the hook of the sling 45 after pressing the pair of protrusions 11a with the temporary support pillar gripping tool 40, so that even if the boom of the crane 30 is extended or raised, the temporary support pillar gripping tool 40 can be used. The pair of protrusions 11a is regulated so as not to come off.

Returning to FIG. 2, the middle pipe 12 has a hook 12a provided at its base end portion and protruding in a radial direction, a plurality of female screw holes provided at its tip portion and radially passing through a wall surface, and a plurality of female screws. A plurality of bolts 12b respectively screwed into the holes.

The hook 12a is formed with a thickness corresponding to the width of the slit 11b, and is provided with a locking hole capable of locking the hook of the crane 30 and the like. The hook 12a is formed with a thickness smaller than the width of the slit 11b (for example, a thickness of 12 mm) so as to be movable in the slit 11b.

The hook 12a is arranged so as to project to the outside from the slit 11b of the outer tube 11. Therefore, by locking the hook of the crane 30 or the like in the locking hole of the hook 12a and operating the crane 30 to move the hook 12a along the slit 11b, the middle pipe 12 can be moved in the longitudinal direction. it can.

The bolt 12b is a bolt having such a length that it can contact the wall surface of the inner pipe 13 when it is screwed into the female screw hole of the middle pipe 12. The inner pipe 13 can be fixed to the middle pipe 12 by tightening the bolts 12b toward the wall surface of the inner pipe 13 arranged inside the middle pipe 12.

The inner pipe 13 is provided with a hoisting hook 13a extending in the radial direction from the tip of the inner tube 13 and a tip end side of the hoisting hook 13a that is higher than the hoisting hook 13a. And

The hoisting hook 13a is configured to be able to be engaged with a winch or the like of an aerial work vehicle in order to pull up the inner pipe 13 from the middle pipe 12.

The high-voltage wire gripping tool attachment portion 13b has, for example, a rectangular cross section and is formed so that a temporary arm provided at the base end of the high-voltage wire gripping tool 20 that grips the high-voltage wire can be mounted.

Next, the relationship between the middle pipe 12 and the inner pipe 13 will be described with reference to FIG. FIG. 3A is a diagram showing a state in which the inner pipe 13 is movable with respect to the middle pipe 12, and FIG. 3B is a state in which the inner pipe 13 is locked with respect to the middle pipe 12. FIG. 3( c) is a diagram showing a partial configuration of the inner pipe 13. In FIGS. 3A and 3B, the main body of the inner tube 13 is not shown for easy understanding.

The middle pipe 12 includes a plurality of support plates 15 fixed to the inner wall surface thereof by welding or the like. The support plate 15 is, for example, a steel plate having a shape of a right triangle, and is fixed so that the plane of the right triangle contacts the inner wall surface. Each support plate 15 is fixed at regular intervals in the longitudinal direction of the middle tube 12 so as to form two rows at positions that are opposed to each other in the radial direction.

As shown in FIG. 3C, the inner pipe 13 includes a plurality of lowering prevention plates 16 fixed to the outer wall surface thereof by welding or the like. The fall prevention plate 16 is, for example, a steel plate having a shape of an isosceles triangle, and is fixed so that a flat surface of the isosceles triangle contacts an outer wall surface. The respective fall prevention plates 16 are fixed at regular intervals in the longitudinal direction of the inner pipe 13 so as to form two rows at positions opposed to each other in the radial direction.

The support plate 15 and the descent prevention plate 16 are arranged such that when the temporary support columns 10 are installed so as to extend in a substantially vertical direction with respect to the ground, the sides facing each other extend on a horizontal plane, and the weight of the inner pipe. It is formed so that it can support. Therefore, the support plate 15 can support the inner pipe 13 with respect to the middle pipe 12 so as not to move downward when the lowering prevention plate 16 is brought into contact with the support plate 15 from above.

Therefore, when the inner tube 12 and the inner tube 13 are relatively rotated, the position where the support plate 15 of the inner tube 12 is provided and the position where the lowering prevention plate 16 of the inner tube 13 is provided match. The support plate 15 is supported by the descent prevention plate 16. On the other hand, when the support plate 15 does not come into contact with the lowering prevention plate 16 when it is rotated 90° clockwise when viewed from above from this state, the inner pipe 13 can be moved with respect to the middle pipe 12.

The support plate 15 and the fall prevention plate 16 are preferably fixed to the middle pipe 12 and the inner pipe 13 at the same intervals. If the support plate 15 and the lowering prevention plate 16 are provided at the same intervals with respect to the middle pipe 12 and the inner pipe 13, for example, at intervals of 0.5 m, the inner pipe 13 with respect to the middle pipe 12 in a predetermined unit. For example, it can be expanded and contracted in units of 0.5 m.

Next, with reference to FIG. 4, the configuration of the base end portion of the outer tube 11 will be further described. FIG. 4 is a cross-sectional view in which the outer tube 11 having a part of the base 14 inserted therein is cut in the longitudinal direction.

The outer tube 11 is formed so as to extend in the longitudinal direction from the base end face, and has a central hole 11c into which a part of the base 14 is inserted, and a base end portion. The outer pipe 11 is provided in the radial direction from the wall surface toward the central hole 11c. Further, a pair of through holes 11d penetrating to the outer tube 11 and a lock pin 11e that can be inserted into the pair of through holes 11d and that fixes the base 14 inserted into the center hole 11c to the outer tube 11 are further provided.

The center hole 11c is formed so that the outer tube insertion portion 14f of the base 14 can be inserted. The center hole 11c has a cross-sectional shape corresponding to the cross section of the outer tube insertion portion 14f.

The lock pin 11e is a fixture that fixes the outer tube insertion portion 14f inserted in the center hole 11c to the outer tube 11. The lock pin 11e is, for example, a pin that is an elongated member, an operating portion that is provided at the base end portion of the pin, a pole or a ball that is provided at the tip end portion of the pin and that can be projected and retracted in the radial direction with respect to the pin, And a button provided on the operation unit for operating the pole or the ball. The lock pin 11e is formed to have a length such that the pole or the pin is located outside the outer tube 11 when inserted into the pair of through holes 11d.

Next, the configuration of the base 14 according to the embodiment will be described with reference to FIG. 5A is a diagram showing the configuration of the base 14, and FIG. 5B is a diagram showing a state in which the outer pipe 11 is connected to the base 14. In FIG. 5, for easy understanding, a part of the configuration of the base 14 is illustrated as extending straight upward without being collapsed due to its own weight or the weight of the outer tube 11.

The base 14 includes a wooden bottom plate 14a that comes into contact with the ground, a weight 14b fixed to the upper surface of the wooden bottom plate 14a with bolts, and an eyebolt 14d fixed to the upper surface of the weight 14b and extending vertically from the weight 14b. A U-bolt 14e that engages with the eyebolt 14d and an outer pipe insertion portion 14f that is formed such that the base end of the U-bolt 14e is fixed and that can be inserted into the center hole 11c of the outer pipe 11 are provided.

The wooden bottom plate 14a and the weight 14b form a base body of the base 14. The wooden bottom plate 14a is formed by stacking a plurality of wooden plates, for example. The wooden bottom plate 14a is provided on the base 14 so as not to damage the pavement even if it is installed on the pavement such as asphalt.

The weight 14b is configured by stacking a plurality of steel plates in the thickness direction. The weight 14b is integrated by, for example, holding both ends of the steel plate by the fixtures 14c and welding them.

The eyebolt 14d and the U-bolt 14e are means for connecting the base body and the outer tube insertion portion 14f so that they can swing. The eyebolt 14d is a bolt having a ring or a ring-shaped locking portion on its head.

The U bolt 14e is a U-shaped bolt having male threads formed at both ends. Both ends of the U-bolt 14e are fixed to the lower surface of the outer tube insertion portion 14f.

The outer pipe insertion portion 14f is a member configured to be inserted into the center hole 11c of the outer pipe 11. The outer pipe insertion portion 14f extends in a direction parallel to the lower surface portion, and includes a through hole through which the lock pin 11e inserted into the through hole 11d of the outer pipe 11 can be inserted, as shown in FIG.

Next, the configuration of the high-voltage wire gripper 20 will be described with reference to FIG. FIG. 6 is a diagram showing how the high-voltage wire gripper 20 grips the high-voltage wire 2.

The high-voltage wire gripping tool 20 includes a temporary arm 21 attached to the high-voltage wire gripping tool attachment portion 13b of the inner tube 13, a four-sided roller 22 that extends upward from the temporary arm 21 and restricts the position of the high-voltage wire 2, and a temporary arm. 21 and a pair of insulators 23 extending in opposite directions from each other and rotatably supported in the vertical direction with respect to the temporary arm 21, and a pair of insulators 23 rotatably supported by the tip of the insulator 23 and gripping the high voltage wire 2. And a high voltage wire gripping section 24.

The temporary arm 21 is mounted on the high-voltage wire gripping tool attachment portion 13b from above and is supported so as to be rotatable about the axis with respect to the inner tube 13. Therefore, the orientation of the high-voltage wire gripper 20 can be adjusted according to the condition of the structure. The temporary arm 21 is provided with a rotation support portion 21a that is provided so as to project on both sides thereof and that rotatably supports the base end portion of the insulator 23.

The four-sided roller 22 is made of an insulating material and is formed by combining four rollers rotatably supported by the frame in a cross beam shape. Since the high voltage wire 2 is surrounded by four rollers, the high voltage wire 2 can be held in the four-sided roller 22 even when the high voltage wire 2 is curved.

The insulator 23 is a member that insulates the high voltage wire 2 from the temporary arm 21. Since the insulator 23 needs tensile strength, it is preferably, for example, a tension-resistant polymer insulator. The base end portion of the insulator 23 is rotatably supported by the rotation support portion 21a of the temporary arm 21 via a pin or the like.

The high-voltage wire grip portion 24 is made of, for example, a relatively lightweight metal material such as an aluminum alloy, and grips the high-voltage wire 2 by sandwiching the high-voltage wire 2 from the radial direction. The high-voltage wire gripping portion 24 has a U-shaped cross section, and is rotatably supported on the main body 24a that houses the high-voltage wire 2 in an internal space extending in the longitudinal direction, and on the opening side of the main body 24a. A stopper 24b capable of confining the high-voltage line 2 in the internal space of the main body 24a.

The high-voltage wire gripping portion 24 is rotatably supported at the center of the high-voltage wire gripping portion 24, and is configured to rotate on a plane parallel to the plane in which the insulator 23 extends.

Next, the configuration of the crane 30 that supports the temporary support column 10 to which the high-voltage wire gripper 20 is attached will be described with reference to FIG. 7. FIG. 7 is a front view showing the configuration of the crane 30.

The crane 30 is, for example, a mini crawler crane (crab crane), a truck with a crane, or the like. If it is a mini crawler crane, for example, it can be carried by a small truck and can work in mountainous areas, rough terrain, and narrow land where the truck crane cannot work.

The crane 30 includes a base 31, a plurality of crawlers 32 rotatably supported by the base 31, a plurality of outriggers 33 extending from the base 31 and capable of lifting the crawler 32 from the ground, and the base 31. The boom 34 extending upward from the base 34 and extending in the longitudinal direction, the winch 35 provided inside the base 31, the wire 36 windably connected to the winch 35, and the tip of the wire 36. And a hook 37.

A temporary support column gripper 40 that holds the temporary support column 10 is detachably provided at the tip of the boom 34. In the crane 30, for example, when a worker operates a remote controller, the boom 34 can be expanded and contracted, raised and lowered, and the wire 36 can be wound up.

Returning to FIG. 1, when the telephone pole rebuilding assistance device 1 is assembled on site, the wire 36 is connected to the hook 12 a of the middle pipe 12 via the hook 37. Therefore, by operating the winch 35 to wind up the wire 36, the middle pipe 12 can be easily pulled up with respect to the outer pipe 11.

Next, with reference to FIG. 8, the configuration of the temporary support column gripper 40 will be described. FIG. 8A is a plan view showing the configuration of the temporary support column gripper 40, and FIG. 8B is a side view showing the configuration of the temporary support column gripper 40.

The temporary support pillar gripper 40 includes a crane mounting portion 41 mounted on the tip of the boom 34, a temporary support pillar gripping portion 42 for gripping the distal end of the temporary support pillar 10, a crane mounting portion 41 and a temporary support pillar gripping portion. And a hook 44 provided on the temporary support column grip 42 and to which a sling 45 (not shown) for suspending the temporary support column 10 is attached.

The crane mounting portion 41 is formed in a U shape in a plan view, and is fixed to the tip end portion of the boom 34 with a bolt or the like. The crane attachment portion 41 is provided on the base end portion that comes into contact with the rotary connection portion 43, the pair of extension portions that extend vertically from both ends of the base end portion, and the pair of extension portions that are provided on the tip end side of the pair of extension portions. A reinforcing plate for connecting and reinforcing the parts.

The temporary support column grip portion 42 is configured to grip the pair of protrusions 11 a of the temporary support column 10 from above. The temporary support column grip portion 42 is bent at both ends of the base end portion 42a that contacts the rotary connection portion 43 and the base end portion 42a, and the tip end portion extends vertically to the base end portion 42a. And a portion 42b. The tip portions of the pair of extending portions 42b are arranged parallel to each other.

The extending portion 42b is formed with a protrusion holding portion 42c that moves downward from above the protrusion 11a of the outer tube 11 to sandwich the protrusion 11a in the radial direction. The projection holding portion 42c holds the projection 11a at a position opposed to each other in the radial direction, and supports the outer tube 11 installed in a substantially vertical direction with respect to the ground so that the outer tube 11 does not fall with the base end as a fulcrum.

The rotary connecting portion 43 has a bolt 43a, a nut 43b that can be screwed into the bolt 43a, and a through hole that allows the bolt 43a to be inserted, and has a ring shape that is sandwiched between the crane attachment portion 41 and the temporary support column grip portion 42. And a bearing 43c. The bearing 43c is, for example, a resin bearing. The bolt 43a penetrates the through hole of the base end portion of the crane mounting portion 41, the through hole of the bearing 43c, and the through hole of the base end portion 42a of the temporary support column grip portion 42.

The rotation connecting portion 43 connects the crane mounting portion 41 and the temporary support column gripping portion 42 so as to be rotatable around a rotation axis (a central axis of the bolt 43a) extending in a direction intersecting the longitudinal direction of the boom 34 of the crane 30. Is configured to.

The pair of hooks 44 project from both side surfaces of the pair of extending portions 42b so as to face each other. The hook 44 is formed in a U shape, and both ends of the hook 44 are fixed to the side surfaces of the extending portion 42b. In addition, when the outer tube 11 is lifted in a substantially vertical direction in a state in which the sling 45 locked to the hook 44 is locked to the hook 11 f of the outer tube 11, the projection 11 a is slightly smaller than the temporary support column grip 40. The length is preferably such that it is located on the lower side.

Next, with reference to FIGS. 9A to 9H, a flow of a utility pole replacement work performed by an operator using the utility pole rebuilding assistance device 1 will be described.

First, as shown in FIG. 9A, the temporary support column 10 is lifted by the crane 30. Specifically, the sling 45 is locked to the hook 11f provided in the vicinity of the intermediate portion of the temporary support column 10 shown in FIG. 1 and the hook 44 of the temporary support column gripping tool 40 attached to the crane 30 to make the crane 30 By raising the boom 34, the temporary support pillar 10 is lifted while the base end portion of the temporary support pillar 10 is in contact with the ground.

Next, as shown in FIG. 9B, the base 14 is attached to the base end portion of the temporary support column 10. More specifically, first, the crane 30 is operated to stand the temporary support column 10 in a direction perpendicular to the ground. Then, as shown in the enlarged view on the upper side of FIG. 9B, the temporary support column 10 enters between the extending portions 42b of the temporary support column gripper 40 shown in FIG. Next, the boom 34 of the crane 30 is slowly contracted to move the outer pipe 11 so that the outer pipe insertion portion 14f of the base 14 shown in FIG. 4 is inserted into the center hole 11c of the outer pipe 11. Next, the lock pin 11e is inserted into the pair of through holes 11d of the outer pipe 11 and the through hole of the outer pipe insertion portion 14f of the base 14 to fix the outer pipe 11 and the base 14.

Next, as shown in FIG. 9C, the temporary support column gripping tool 40 is caused to grip the tip portion of the temporary support column 10. More specifically, first, the boom 34 of the crane 30 is further raised and the length thereof is shortened, so that the pair of protrusions 11a provided on the outer pipe 11 are temporarily provided as shown in the enlarged view of FIG. 9C. The support column gripper 40 is gripped. At this time, since the base end portion of the outer pipe 11 is supported by the base 14, the tensile load applied to the sling 45 is relaxed and the sling 45 is loosened. After the pair of protrusions 11a is gripped by the temporary support pillar gripper 40, the hook provided at the tip of the sling 45 is removed from the hook 11f of the outer tube 11 shown in FIG. 1 and locked to the hook 11g located immediately below. As a result, the pair of protrusions 11a continue to be gripped even when the boom 34 is extended.

Next, as shown in FIG. 9D, the inner pipe 13 is pulled out from the middle pipe 12 by a desired length and fixed. More specifically, first, the winch of the aerial work vehicle is attached to the lifting hook 13a of the inner pipe 13, and the winch is wound to pull out the inner pipe 13 from the middle pipe 12. Next, when the inner pipe 13 is pulled out by a predetermined length, the inner pipe 13 is rotated by about 90° with respect to the middle pipe 12 to position the inner pipe 13 with respect to the middle pipe 12. Next, the inner pipe 13 is fixed to the inner pipe 12 by screwing four bolts 12 b provided on the head of the inner pipe 12 shown in FIG. 2 toward the inner pipe 13.

Next, as shown in FIG. 9E, the high-voltage wire gripping tool 20 is attached to the temporary support column 10 and the high-voltage wire 2 is gripped by the high-voltage wire gripping tool 20. More specifically, first, the temporary arm 21 of the high-voltage wire gripping tool 20 shown in FIG. 6 is mounted on the high-voltage wire gripping tool mounting portion 13b of the inner pipe 13. Next, by operating the crane 30 to wind up the wire 36, the middle pipe 12 is pulled out from the outer pipe 11, and the temporary arm 21 is brought close to the high voltage line 2. Next, the position of the high-voltage wire gripper 24 with respect to the high-voltage wire 2 is adjusted, and the wire 36 is further wound to move the high-voltage wire 2 into the four-sided roller 22. Next, the position and orientation of the high-voltage wire gripper 24 are manipulated using a hot stick (indirect live-wire tool) to cause the high-voltage wire gripper 24 to grip the high-voltage wire 2.

Next, as shown in FIG. 9( f ), the high voltage wire 2 to which the high voltage wire gripping tool 20 is attached is removed from the existing utility pole 3 together with the distribution arm 5. Explaining in more detail, first, the arm tieless band of the distribution arm 5 in which the high voltage line 2 is installed on the existing electric pole 3 is loosened. Next, the boom 34 of the crane 30 is expanded/contracted and raised/lowered to remove the load of the existing utility pole applied to the distribution arm 5, and then the wire 36 of the crane 30 is gradually rolled up to extend the temporary support pillar 10 to extend the high-voltage line. The high voltage line 2 is removed from the upper end portion of the existing utility pole 3 by lifting 2.

The low-voltage wires may be removed from the existing utility pole 3, bundled together, and fixed to the temporary support pillar 10 with a band or the like. The communication line may be removed from the existing utility pole 3 and fixed to the temporary support pole 10 using a J hook or the like.

Next, as shown in FIG. 9(g), the existing utility pole 3 is removed, and a new utility pole is installed at the position where the existing utility pole 3 was installed. Since the high voltage line 2 is lifted upward by extending the temporary support column 10, it is possible to remove the existing utility pole 3 and build a new utility pole without being hindered by the high voltage line 2.

Next, as shown in FIG. 9H, the distribution arm 5 to which the high voltage wire 2 is attached is transferred from the temporary support pole 10 to the new electric pole 4. More specifically, first, the crane 30 (not shown) is operated to relocate the distribution arm 5 to which the high voltage line 2 is attached to the upper end of the new electric pole 4. Next, the high-voltage wire gripping tool 20 is removed from the high-voltage wire 2, and then the crane 30 (not shown) is operated to remove the temporary support column 10. The above is the flow of the replacement work of the electric pole.

In the temporary support column 10 according to the embodiment, the base end portion of the outer tube 11 is swingably supported with respect to the base 14 installed on the ground, and the pair of protrusions 11 a provided on the tip portion of the outer tube 11 is provided. Is gripped by the temporary support column gripper 40. For this reason, it is not necessary to strictly level the base 14 when it is installed, and the temporary support pillar 10 can be installed in a stable state even if a slight horizontal load is applied to the temporary support pillar 10. Further, by operating the crane 30, the position of the temporary support column 10 can be adjusted while holding the high voltage line 2 and the like.

Moreover, the temporary support column 10 according to the embodiment is configured to expand and contract in the longitudinal direction. Therefore, the time required for assembling the temporary support pole 10 can be reduced, and the length of the temporary support pole 10 can be adjusted on the spot according to the installation situation of the overhead wire, so that the electric pole can be rebuilt smoothly.

Furthermore, the telephone pole rebuilding assistance device 1 according to the embodiment is configured such that the inclination and length of the temporary support pole 10 can be operated by the remote control of the crane 30. Therefore, even if there is only one worker, it is possible to easily install the temporary support columns 10 and temporarily move the overhead line objects to the temporary support columns 10. Further, since the existing crane 30 can be used as in the case of a truck with a crane, it can be introduced at a low cost. Furthermore, since a small number of workers can quickly install the system, the operation rate can be improved.

The present invention is not limited to the above-mentioned embodiment, and the modifications described below are possible.

(Modification)
In the above embodiment, the temporary support column 10 includes the outer pipe 11, the middle pipe 12, and the inner pipe 13, but the present invention is not limited to this. The temporary support column 10 may be composed of, for example, the outer tube 11 and the middle tube 12, or may be composed of the middle tube 12 and the inner tube 13. The middle tube 12 is not limited to a single tube, and may be composed of a plurality of tubes arranged in a nest.

In the above embodiment, the outer pipe 11, the middle pipe 12, and the inner pipe 13 are formed in a cylindrical shape, but the present invention is not limited to this. The outer tube 11, the middle tube 12, and the inner tube 13 may be formed in a nested shape with respect to each other as long as they are relatively movable in the longitudinal direction. For example, a cross section of a triangle, a quadrangle, another polygon, an ellipse, or the like. May have.

In the above embodiment, the pair of protrusions 11a are formed in a cylindrical shape, but the present invention is not limited to this. The pair of protrusions 11a may have any shape as long as they can be gripped by the temporary support column gripper 40, and may have, for example, a cross section of a triangle, a quadrangle, another polygon, an ellipse or the like. Further, the surfaces of the pair of protrusions 11a may be provided with irregularities for preventing slippage, or may be roughened.

In the above embodiment, the middle pipe 12 and the inner pipe 13 are fixed to each other by the bolt 12b screwed into the female screw hole of the middle pipe 12, but the present invention is not limited to this. I can't. The means for fixing the middle pipe 12 and the inner pipe 13 may be any means, and for example, the lock pin may be configured to be insertable into the through holes formed in each of the middle pipe 12 and the inner pipe 13. .

In the above embodiment, the base body and the outer tube insertion portion 14f were connected by the eyebolt 14d and the U bolt 14e, but the present invention is not limited to this. Any connecting means may be used as long as it can be connected to the base body and the outer tube inserting portion 14f so as to be swingable, and for example, a ball joint or the like may be used.

In the above embodiment, the wooden bottom plate 14a of the base 14 was in contact with the ground, but the present invention is not limited to this. For example, when a hole or the like is dug near the position where the temporary support pillar 10 is installed, the wooden bottom plate 14a is removed from the base 14 and the weights 14b are attached to each other in order to prevent the temporary support pillar 10 from falling into the hole or the like. You may fix to a pair of H steel arranged in parallel. The weight 14b is fixed to the H steel by using a clamp or the like.

In addition, the wooden bottom plate 14a may be replaced with a rubber plate member in order to suppress the swing of the temporary support column 10.

In the above-described embodiment, one high-voltage wire 2 is gripped by one high-voltage wire gripping tool 20, but the present invention is not limited to this. Even when it is applied to a place where two high-voltage lines are passed, by holding each high-voltage line 2 with the high-voltage line gripping tool 20, it is possible to perform a utility pole rebuilding work. More specifically, as shown in FIG. 10, the temporary arm 21 for gripping the upper high-voltage line 2 is rotated around the central axis of the temporary support column 10 to change the angle of the high-voltage wire gripping tool 20, and the base 14 By adjusting the inclination of the temporary support column 10 with respect to and extending upward, the temporary support column 10 can be installed in a state in which the upper high-voltage line 2 can be supported while the lower high-voltage line 2 is avoided.

In the above-mentioned embodiment, the construction method of the present invention was applied to the passage portion of the high voltage line, but the present invention is not limited to this. For example, the construction method of the present invention can also be applied in the field such as distribution vertical distribution of high voltage lines, high voltage two lines of high voltage vertical wiring and triangular wiring. For example, as shown in FIG. 11, even in the case of high-voltage vertical wiring, each temporary high-voltage wire 2 is gripped by arranging the temporary arms 21 vertically on the temporary support column 10 and providing a plurality of steps (for example, two steps or three steps). can do.

In the above embodiment, the high-voltage wire gripping tool 20 grips the high-voltage wire, but the present invention is not limited to this. For example, the high-voltage wire gripper 20 may be configured to grip other overhead wire objects such as low-voltage wires and communication wires.

The above embodiments are mere examples, and the present invention is not limited to these, and various embodiments are possible without departing from the spirit of the invention described in the claims. The constituent elements described in the respective embodiments and modifications can be freely combined. Moreover, the invention equivalent to the invention described in the claims is also included in the present invention.

1 Utility pole rebuilding support device 2 High voltage line 3 Existing utility pole 4 New utility pole 5 Distribution arm 10 Temporary support pole 11 Outer tube 11a Projection 11b Slit 11c Center hole 11d Through hole 11e Lock pin 11f, 11g Hook 12 Middle tube 12a Hook 12b Bolt 13 Inner tube 13a Lifting hook 13b High-voltage wire gripping tool attachment part 14 Base 14a Wooden bottom plate 14b Weight 14c Fixing tool 14d Eye bolt 14e U bolt 14f Outer tube insertion part 15 Support plate 16 Lowering prevention plate 20 High-voltage wire gripping tool 21 Temporary arm 21a Rotational support Part 22 Four-sided roller 23 Insulator 24 High-voltage wire gripping part 24a Main body 24b Stopper 30 Crane 31 Base 32 Crawler 33 Outrigger 34 Boom 35 Winch 36 Wire 37 Hook 40 Temporary support pillar gripper 41 Crane mounting part 42 Temporary support pillar gripper 42a Base end part 42b Extension part 42c Protrusion clamping part 43 Rotating connection part 43a Bolt 43b Nut 43c Bearing 44 Hook 45 Sling

Claims (9)

A first pipe provided with a pair of protrusions that extend in the radial direction so as to face each other and that can be gripped by a gripping tool provided at the tip of the crane;
A second tube that is disposed inside the first tube and that can be pulled out in a longitudinal direction from a tip portion of the first tube;
A base connected to the base end of the first pipe and supporting the first pipe so as to be swingable;
Temporary support pillar with. The first tube comprises a slit extending in the longitudinal direction,
The second pipe extends in a radial direction from a base end portion thereof, has a locking hole capable of locking a hook of a crane, and protrudes from the slit to the outside of the first pipe and moves in the slit. With possible hooks,
The temporary support column according to claim 1. The first tube includes a central hole formed so as to extend in a longitudinal direction from a base end surface,
The base includes a base body that is installed on the ground, and an insertion portion that is swingably supported with respect to the base body and that can be inserted into the center hole.
The insertion portion is fixed to the first pipe by a lock pin when inserted into the center hole,
The temporary support column according to claim 1. A third tube having a tip formed of an insulating material, disposed inside the second tube, and capable of being pulled out in the longitudinal direction from the tip of the second tube;
The first pipe and the second pipe are both made of steel,
The temporary support column according to any one of claims 1 to 3. A temporary support column that is expandable and contractable in the longitudinal direction and includes a pair of protrusions that extend in the radial direction so as to face each other
A crane in which a temporary support column gripping tool capable of gripping the pair of protrusions is attached to a tip end portion of a boom that can be expanded and contracted in the longitudinal direction,
An overhead wire object gripping tool that is provided at the tip of the temporary support column and that can hold an overhead wire object,
Utility pole rebuilding support device. The temporary support pillar gripper is
A crane mounting portion mounted on the tip of the boom,
A temporary support column gripping portion that is rotatably supported around a rotation axis that extends in a direction intersecting the longitudinal direction of the boom with respect to the crane mounting portion, and that sandwiches each of the pair of protrusions from both sides in the radial direction,
With
The telephone pole rebuilding support device according to claim 5. The temporary support column gripping portion includes a pair of hooks provided on both side surfaces thereof, extending from the both side surface portions so as to face each other, and capable of locking a sling for lifting the temporary support column.
The utility pole rebuilding support device according to claim 6. The temporary support column includes a first tube including the pair of protrusions, and a second tube that is disposed inside the first tube and that can be pulled out in a longitudinal direction from a tip end portion of the first tube. And
The crane includes a winch capable of paying out and winding the wire,
An end of the wire is locked to the second tube, and the second tube is moved in the longitudinal direction with respect to the first tube in response to the operation of the winch.
The utility pole rebuilding assistance device according to any one of claims 5 to 7. With the base end of the temporary support pillar in contact with the ground, a step of lifting the temporary support pillar with a crane,
By holding a pair of projections provided at the tip of the temporary support pillar and extending in the radial direction so as to face each other with an overhead wire object gripping tool attached to the tip of the crane, the temporary support pillar is grounded. The step of installing so as to extend in a substantially vertical direction,
A step of transferring the overhead wire object erected on the existing utility pole to the temporary support pole installed on the ground;
Removing the existing utility pole from the ground,
A step of building a new utility pole at the position where the removed existing utility pole was installed on the ground;
A step of relocating the overhead wire object that has been relocated to the temporary support pole to the new utility pole built in the ground;
Removing the temporary support columns installed on the ground,
Power pole rebuilding method including.

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