JP2017123716A - Removal device for lead-in line and removal method for lead-in line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a removal device for lead-in line which removes a lead-in line safely.SOLUTION: A removal device 10 includes a grasping tool 1 having a parallel crank mechanism 1m and an anchoring tool 2. The parallel crank mechanism 1m can grasp a lead-in line We by means of a pair of link members 1a, 1b. The anchoring tool 2 has a hook 2h that can be anchored freely to the supporting point of a house, and an operation lever 2r that can be coupled freely with the grasping tool 1. The grasping tool 1 has an extension rod 11 extending from the link member 1a, and can be arranged freely along the lead-in line We on the underside thereof, a coupling ring 11r formed at the tip of the extension rod 11, and an operation handle member 12 having a U-shaped ring 12d, that can be introduced freely from the upper side of the lead-in line We, at the tip thereof. In a state where the U-shaped ring 12d is locked to the lead-in line We, the link members 1a, 1b are brought close to each other to grasp the lead-in line We, and when the lead-in line We is cut between the U-shaped ring 12d and supporting point, the grasping tool 1 and anchoring tool 2 can be stretched substantially on a straight line by the tension of the lead-in line We.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lead-in wire removal device and a lead-in wire removal method. In particular, the present invention relates to a structure of a lead-in wire removal device for safely removing a lead-in wire drawn from a utility pole to a support point such as a house and a method for removing the lead-in wire.

  In general, the low-voltage distribution line is installed on a power pole erected on the ground. And in order to draw electricity into a home etc., the low voltage | strand lead-in line is fastened to the wall surface etc. on the house side from the appropriate position of a utility pole.

  FIG. 7 is a column diagram showing an example in which a support point for a lead-in wire is directly attached to a wall surface of a house using a lead-in wire arm according to the prior art. FIG. 8 is a perspective view showing an example in which a support point for a lead-in wire is attached to a purlin exposed under the roof using a lead-in wire arm according to the prior art. FIG. 9 is a perspective view showing a configuration of a lead wire arm according to the prior art, and is an enlarged view of a main part of FIG.

  Referring to FIG. 7, for example, the lead-in line We is drawn into the house H via a brace A fixed to a utility pole P standing on the ground. In the example shown in FIG. 7, the support point of the lead-in wire We is attached to the lead-in wire arm 9 fixed to the wall surface W of the house H. The lead-in line We is distributed to the house H side.

  Referring to FIG. 8, the lead wire arm 9 has one end fixed to the purlin Pu exposed under the roof Rf. A lead-in wire We is supported at the tip of the other end of the lead-in wire arm 9 via a bindless insulator Gi. Further, a reinforcing branch line Wb such as a hard copper wire is attached to the tip of the other end of the lead wire arm 9 so as to antagonize the tension of the lead wire We.

  Referring to FIG. 9, for example, the lead wire arm 9 according to the prior art is constituted by a long equilateral angle member bent at a right angle. The lead wire arm 9 has a plurality of screw holes 91 h on one end portion side of the piece 91. Similarly, the lead wire arm 9 has a plurality of screw holes 91 h on one end side of the other piece 92. The lead wire arm 9 can be fixed to the wall surface W of the house H by inserting the screw member 92s into the plurality of screw holes 91h opened in the other piece 92 of the lead wire arm 9 (see FIG. 7). Further, the lead wire arm 9 can be fixed to the purlin Pu exposed under the roof Rf by inserting the screw member 92s into the plurality of screw holes 91h (see FIG. 8).

  Referring to FIG. 8 or FIG. 9, the lead-in wire arm 9 has a single mooring hole 93 h at the tip of the one end 91 on the other end side. Similarly, the lead wire arm 9 has a single mooring hole 93h at the tip of the other piece 92 on the other end side. The bindless insulator Gi can be moored using the mooring hole 93h opened in the piece 91 of the lead wire arm 9. The lead-in wire We is supported by the bindless insulator Gi.

  Referring to FIGS. 7 to 9, when removing the lead-in line We from the house H, the support point of the lead-in line We is located at a high place that is not reachable from the ground, so that the worker climbs up to the ladder. The lead-in line We was removed. Generally, there are many restrictions on installing an aerial work vehicle in a site, and a ladder is used for the removal work of the lead-in line We.

  FIG. 10: is a front view which shows the mode of the removal work of the lead wire by a prior art. FIG. 11 is an enlarged view of a main part of FIG.

  With reference to FIG. 10 or FIG. 11, when the lead-in line We is removed from the house H, the following procedure is performed.

  First, the ladder L is leaned on the wall surface W of the house H, and the removal worker ascends to the ladder L in a state where the work assistant supports the ladder L on the ground. Next, the removal operator ties one end of the rope R to the lead-in line We. Next, the lead-in wire We is cut with a cutter or the like between the knot of the rope R and the support point. Next, the removal operator grasps the ladder L with one hand and pulls out the other end side of the rope R with the other hand, whereby the lead-in wire We can be lowered to the ground. And a series of removal work is complete | finished.

  By the way, referring to FIG. 10 or FIG. 11, when the lead-in wire Wet is cut carelessly, the removal operator is suddenly dragged by the tension of the lead-in wire We, and there is a concern that the ladder L falls down without reestablishing the posture. . Generally, since the removal operator moored the safety belt to the ladder L, it was difficult to release the safety belt rapidly.

  In order to solve such a problem, a lead-in wire removal device that can safely remove a lead-in wire without an operator being suddenly dragged by the lead-in wire on a ladder is disclosed (for example, see Patent Document 1).

JP 2013-212019 A

  FIG. 12: is a front view which shows the structure of the lead wire removal apparatus by a prior art. FIG. 13: is a perspective view which shows the structure of the lead wire removal apparatus by a prior art. FIG. 14: is a perspective view which shows the structure of the drawing wire removal apparatus by a prior art, and is a state figure which opened the rocking | fluctuation board.

  FIG. 15: is a principal part enlarged front view which shows the structure of the removal apparatus for lead wires by a prior art. FIG. 16: is a principal part expanded longitudinal cross-sectional view which shows the structure of the lead wire removal apparatus by a prior art. Note that FIGS. 12 to 16 of the present application correspond to FIGS. 3 to 7 of Patent Document 1. FIG.

  Referring to FIGS. 12 to 16, the lead-in wire removal device (hereinafter abbreviated as the removal device) 8 according to the prior art includes a main body 80 and a hook 81h. The main body 80 includes a pair of support plates 81p and 82p and a swing plate 82. The main body 80 includes a ratchet pawl 83 and a pulley 84.

  12 to 14, one support plate 81p and the other support plate 82p are arranged to face each other with a predetermined interval. A hook 81h is rotatably connected to one end of these support plates 81p and 82p. The hook 81h can be engaged with and disengaged from a support point provided on the wall surface W of the house (see FIG. 12).

  Referring to FIGS. 12 to 14, the intermediate portion of one support plate 81 p and the other end portion of the other support plate 82 p connect the first rotating shaft 811. A ratchet claw 83 is rotatably connected to the first rotating shaft 811. Further, one end of the swing plate 82 is rotatably connected to the other end of the first rotating shaft 811.

  Referring to FIGS. 12 to 14, one support plate 81 p cantilever-supports the second rotating shaft 812. A pulley 84 is rotatably connected to the second rotating shaft 812. The pulley 84 can wind the rope R around its outer periphery. In addition, a restriction pin 813 is cantilevered at the other end of the one support plate 81p. The restriction pin 813 is disposed at a predetermined interval from the outer periphery of the pulley 84. The restriction pin 813 restricts the rope R from deviating from the pulley 84.

  Referring to FIGS. 12 to 14, the swing plate 82 includes a handle 82h at the other end. Further, the swing plate 82 has a first notch groove 821 and a second notch groove 822 formed on the other end side (see FIG. 14).

  Referring to FIG. 14, when the handle 82 h is gripped and the swinging plate 82 is rotated clockwise, the second rotating shaft 812 can be introduced into the first notch groove 821 from the outer peripheral direction, and the regulation pin 813. Can be introduced into the second notch groove 822 from the outer peripheral direction. The second rotating shaft 812 can be supported at both ends and the regulation pin 813 can be supported at both ends (see FIG. 13).

  Referring to FIG. 13 or FIG. 14, the second rotating shaft 812 is provided with a head portion 81 a that prevents the swing plate 82 from coming off, and the restriction pin 813 has a head portion that prevents the swing plate 82 from coming off. 81b is provided.

  Referring to FIG. 13, when the handle 82h is gripped and the swing plate 82 is rotated counterclockwise, the periphery of the pulley 84 can be released (see FIG. 14). In the state shown in FIG. 14, it is easy to remove the rope R from the pulley 84. Further, in the state shown in FIG. 14, it is easy to wind the rope R around the pulley 84.

  On the other hand, in the state shown in FIG. 13, the pulley 84 is surrounded by the one support plate 81 p and the swing plate 82, so that the rope R can be prevented from coming off from the main body 80.

  Referring to FIGS. 13 to 16, the ratchet pawl 83 has a plurality of ratchet teeth 83t formed on a part of the outer periphery thereof. The virtual rotation center of these ratchet teeth 83t is eccentric from the rotation center of the ratchet pawl 83 (see FIG. 16).

  Referring to FIGS. 13 to 16, as described above, the ratchet claw 83 has a plurality of ratchet teeth 83 t that are eccentric from the rotation center of the ratchet claw 83. When 83 is rotated in the clockwise direction, the ratchet teeth 83t can be bitten into the rope R wound around the pulley 84 (see FIG. 12).

  In the state shown in FIG. 12, it is easy to grip one end R1 side of the rope R and feed the other end R2 side of the rope R to the ground. When the R2 side tries to move in the direction opposite to the ground side, the return of the rope R can be prevented by the cooperation of the pulley 84 and the ratchet pawl 83. That is, the ratchet claw 83 is a so-called check claw.

  On the other hand, referring to FIG. 15, in a state where the plurality of ratchet teeth 83 t are separated from the rope R, the rope R can be moved in one direction or the other direction.

  Referring to FIGS. 12 to 15, removal device 8 includes an urging member such as a torsion coil spring (not shown) inside ratchet pawl 83. This urging member urges the force that the ratchet pawl 83 rotates toward the pulley 84. And the removal apparatus 8 is provided with the lock apparatus 85 which maintains the state which the ratchet nail | claw 83 separated from the pulley 84 against this biasing member (refer FIG. 16).

  Referring to FIG. 16, the locking device 85 includes a moving claw 85n and a compression coil spring 85s. The moving claw 85n is movably disposed inside a frame body 810 surrounded by a pair of support plates 81p and 82p. The moving claw 85n is provided with a lever bar 851 that can be operated from the outside. The compression coil spring 85s biases the force of the moving claw 85n toward the ratchet claw 83.

  Referring to FIG. 16, the leading edge of the moving claw 85 n is in contact with the outer periphery of the ratchet claw 83. On the other hand, the ratchet pawl 83 has a locking groove 83d cut out at a part of the outer periphery.

  When the ratchet claw 83 is rotated counterclockwise from the state shown in FIG. 16, the leading edge of the moving claw 85n slides on the outer periphery of the ratchet claw 83 and eventually fits into the locking groove 83d. In a state where the leading edge of the moving claw 85n is fitted in the locking groove 83d, the ratchet claw 83 can be kept away from the pulley 84 (see FIG. 15).

  Referring to FIG. 16, by operating lever bar 851 to move moving claw 85n in the direction in which moving claw 85n is separated from ratchet claw 83, the locked state of moving claw 85n and ratchet claw 83 is released. The Then, the ratchet pawl 83 can return to the initial state in which a force is applied to the pulley 84.

  Next, the removal method of the lead-in wire using the removal apparatus 8 is demonstrated. Referring to FIG. 12, a retaining insulator 86 g is rotatably supported on the wall surface W of the house via a support fitting 86. Then, one end of the lead-in wire We is moored to the retaining insulator 86g.

  Referring to FIG. 12, in a state where one end portion of the lead-in wire We is fastened to the retaining lever 86g, the hook 81h is first moored to the retaining lever 86g via the looped string St. Next, the other end R2 side of the rope R is tied to the lead-in line We.

  Next, referring to FIG. 15, the pulley 84 is rotated counterclockwise so that the ratchet pawl 83 is separated from the pulley 84 to lock the pulley 84. Next, referring to FIG. 14, the swing plate 82 is rotated counterclockwise, the rope R is wound around the pulley 84, and the swing plate 82 is returned to the original state (see FIG. 13). .

  In the state shown in FIG. 13, the other end R2 side of the rope R is tied to the lead-in wire We (see FIG. 12), so that the tension of the lead-in wire We depends on the one end R1 side of the rope R. Become. Next, in a state where the worker on the ground side holds the one end R1 side of the rope R, with reference to FIG. 10, another worker who has risen to the ladder L cuts the one end side of the lead-in wire We (see FIG. 10). 12).

  In the state shown in FIG. 12, the ratchet pawl 83 is engaged with the rope R. However, when removing the lead-in wire We, the ratchet pawl 83 is separated from the pulley 84 as shown in FIG.

  Next, when the worker on the ground side sends out the rope R, the lead-in wire We can be lowered to the ground. Thereafter, the rope R is removed from the lead-in line We, the rope R is removed from the removal device 8, and the removal device 8 is further removed from the retaining insulator 86g (see FIG. 12), thereby completing a series of removal operations.

  Referring to FIGS. 12 to 16, the removal device 8 according to the prior art can safely remove the lead-in wire We without the operator being dragged by the lead-in wire We on the ladder L.

  However, the removal device 8 according to the prior art requires a worker who grips the rope R on the ground side and another worker who cuts the lead-in wire We in a state of rising to the ladder L, so that work efficiency is not good. There was a problem. There has been a demand for a removal device for a lead-in wire that is excellent in work efficiency without a worker being dragged to the lead-in wire We on the ladder.

  Moreover, the removal method of the lead-in wire by the prior art using the removal apparatus 8 has the problem that an operation procedure is complicated. There was a need for a method of removing the lead-in wire with a simple operation procedure. The above can be said to be the subject of the present invention.

  This invention is made | formed in view of such a subject, and it is excellent in working efficiency and it aims at providing the removal method for lead-ins and the lead-in removal method which removes a lead-in safely.

  The present inventor has found that the lead-in wire can be removed safely and easily by detachably configuring the gripping tool for gripping the lead-in wire and the retainer that can be fastened to the support point of the house. The inventors have invented a new lead wire removal device and a lead wire removal method as described below.

  (1) The lead-in wire removal device according to the present invention is a lead-in wire removal device for cutting a lead-in wire drawn into a house from the house side and removing the lead-in wire, and can freely hold the lead-in wire from its outer peripheral direction. A set of block-shaped link members arranged in parallel to each other, and a pair of band-like crank members arranged in parallel, with both ends rotatably connected to the set of link members. A holding device having a parallel crank mechanism, a long holding device having a hook that can be fastened to a support point of a house at one end, and an operation lever that can be connected to the holding device at the other end, The gripping tool extends from one of the link members, and is formed at a long extension bar that can be disposed below the lead-in line along the lead-in line, and at the tip of the extension bar. The connection ring and one of the rotation centers of one of the crank members An operation handle member having a semicircular arc-shaped U-shaped ring that extends toward the extension bar and opens the lead-in wire so as to be freely introduced from the upper side thereof, and the retractor includes the operation lever The operation lever is inclined to the hook side with the shaft pin as a center, and has a retaining portion on one end side that can hold the connecting ring. In a state where the U-shaped ring is locked to the lead-in line, a set of the link members are brought close to each other, the lead-in line is gripped, and the lead-in line is cut between the U-shaped ring and the support point. The gripping tool and the retaining tool can be stretched substantially in a straight line by the tension of the lead-in wire.

  (2) The retractor further includes a tension coil spring that urges a force for maintaining the tilted state of the operation lever, and the operation lever raises the operation lever against the tension coil spring. The holding portion to be changed is provided on the other end side, and the retaining portion is adjacent to the first locking groove and the first locking groove in which the operation lever is inclined and the connection ring is locked with difficulty. In addition, it is preferable to include a second locking groove in which the connection ring is easily locked when the operation lever is in a standing state.

  (3) It is preferable to further include a rope for pulling the gripping tool toward the house, and the gripping tool preferably has a mooring ring to which one end of the rope is tied at the bottom of one of the link members.

  (4) The method for removing the lead-in wire according to the present invention comprises a set of block-like link members arranged in parallel so as to be able to grip the lead-in wire from the outer peripheral direction, and both ends are rotatable with the set of link members. A gripping tool having a parallel crank mechanism composed of a pair of band plate-like crank members arranged in parallel with each other, and a hook that can be fastened to a support point of a house at one end, An elongated lever having an operation lever that can be connected to the tool at the other end, and the gripping tool extends from one of the link members and is arranged below the lead-in line along the lead-in line. A freely extending elongated rod, a connecting ring formed at the tip of the extending rod, and extending from one rotation center of one of the crank members toward the extending rod, and extending the lead-in wire above Has a semicircular arc-shaped ring that is open for free introduction from the tip. An operating handle member, the retractor has a shaft pin that rotatably supports an intermediate portion of the operating lever, the operating lever is inclined toward the hook side, and the connecting ring is A retracting method for removing the lead-in wire for removing the lead-in wire by cutting the lead-in wire drawn into the house from the house side using a retractor for the lead-in wire having a retractable retaining part on one end side, A first step of locking the U-ring to the lead-in line, bringing the set of link members close to each other, and gripping the lead-in line; cutting the lead-in line between the U-ring and the support point; And a second step of tensioning the gripping tool and the retaining tool in a substantially straight line with the tension of the lead-in wire.

  The retractor for the lead-in wire according to the present invention holds the hook at the support point of the house, connects the gripping tool and the retainer, and a pair of link members grips the lead-in wire so that the U-ring and the support point are connected. When the lead-in wire is cut in between, the gripping tool and the retaining tool can be stretched in a substantially straight line by the tension of the lead-in wire. And by removing the gripping tool from the retainer, the lead-in wire can be safely removed without being dragged abruptly by the lead-in wire.

  A method for removing a lead-in wire according to the present invention includes a first step of locking a U-shaped ring to a lead-in wire, bringing a pair of link members close to each other, and gripping the lead-in wire, and a lead-in wire between the U-shaped ring and a support point. And at least a second step of stretching the gripping tool and the retaining tool in a substantially straight line with the tension of the lead-in wire. Because it is installed, there is no worry that the removal worker is dragged suddenly by the tension of the lead-in wire.

It is a front view showing the whole lead wire removal device composition by one embodiment of the present invention. It is a figure which shows the structure of the retainer with which the removal apparatus for lead-in lines by the said embodiment is equipped, FIG. 2 (A) is a front view of a retainer, FIG.2 (B) is a top view of a retainer. It is a front view which shows the structure of the retainer with which the removal apparatus for lead wires by the said embodiment is equipped, and is the state figure which changed the operation lever from the inclination state to the standing state. It is a figure which shows the structure of the holding tool with which the removal apparatus for lead wires by the said embodiment is equipped, FIG. 4 (A) is a front view of a holding tool, FIG.4 (B) is a top view of a holding tool, FIG. 4 (C) is a right side view of the gripping tool. It is a figure which shows the structure of the holding tool with which the removal apparatus for lead wires by the said embodiment is equipped, FIG. 5 (A) is a rear view of a holding tool, FIG.5 (B) is a right side surface of FIG. 5 (A). FIG. FIG. 6A is a state change diagram of the gripping tool provided in the lead-in wire removal device according to the embodiment, FIG. 6A is a front view of the gripping tool, and FIG. 6B is a plan view of the gripping tool. (C) is a right side view of the gripping tool. It is a columnar figure which shows the example which attached the support point of the lead-in wire directly to the wall surface of a house using the lead-in wire arm by a prior art. It is a perspective view which shows the example which attached the support point of the lead-in line to the purlin exposed under the roof using the arm for lead-in lines by a prior art. It is a perspective view which shows the structure of the lead wire armature by a prior art, and is the principal part enlarged view of FIG. It is a front view which shows the mode of the removal work of the lead wire by a prior art. It is a principal part enlarged view of FIG. It is a front view which shows the structure of the removal apparatus for lead wires by a prior art. It is a perspective view which shows the structure of the removal apparatus for lead wires by a prior art. It is a perspective view which shows the structure of the removal apparatus for lead wires by a prior art, and is a state figure which opened the rocking | fluctuation plate. It is a principal part enlarged front view which shows the structure of the removal apparatus for lead wires by a prior art. It is a principal part enlarged vertical sectional view which shows the structure of the removal apparatus for lead wires by a prior art.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Configuration of lead-in wire removal device]
First, the configuration of the lead-in wire removal device according to an embodiment of the present invention will be described.

  FIG. 1 is a front view showing an overall configuration of a lead-in wire removal apparatus according to an embodiment of the present invention. FIG. 2 is a diagram showing a configuration of a retaining tool provided in the lead-in wire removal device according to the embodiment, FIG. 2 (A) is a front view of the retaining tool, and FIG. 2 (B) is a plan view of the retaining tool. is there.

  FIG. 3 is a front view showing the configuration of the retainer provided in the lead-in wire removal device according to the embodiment, and is a state diagram in which the operation lever is changed from the inclined state to the standing state.

  4A and 4B are diagrams showing a configuration of a gripping tool provided in the lead-in wire removal device according to the embodiment, FIG. 4A is a front view of the gripping tool, and FIG. 4B is a diagram of the gripping tool. FIG. 4 (C) is a right side view of the gripping tool.

  5A and 5B are diagrams showing the configuration of the gripping tool provided in the lead-in wire removal device according to the embodiment. FIG. 5A is a rear view of the gripping tool, and FIG. ) Is a right side view.

  FIG. 6 is a state change diagram of the gripping tool provided in the lead-in wire removal device according to the embodiment, FIG. 6A is a front view of the gripping tool, and FIG. 6B is a plan view of the gripping tool. FIG. 6 (C) is a right side view of the gripping tool.

  In addition, since the effect | action of the component which has the code | symbol same as the code | symbol used by the prior art is the same, description may be abbreviate | omitted below.

(overall structure)
Next, the whole structure of the lead wire removal apparatus by one Embodiment of this invention is demonstrated. Referring to FIGS. 1 to 6, a lead wire removal device (hereinafter abbreviated as “removal device”) 10 according to an embodiment of the present invention includes a gripping tool 1 having a parallel crank mechanism 1 m and a long staying tool 2. I have.

  Referring to FIG. 1 or FIGS. 4 to 6, the parallel crank mechanism 1m is composed of a set of block-shaped link members 1a and 1b and a set of band-plate-shaped crank members 1c and 1d. The pair of link members 1a and 1b are arranged in parallel. Similarly, the pair of crank members 1c and 1d are arranged in parallel.

  With reference to FIG. 1 or FIG. 4 to FIG. 6, the pair of crank members 1c and 1d are rotatably connected to the pair of link members 1a and 1b at both ends thereof. That is, the set of link members 1a and 1b and the set of band plate-like crank members 1c and 1d constitute a link device of a four-bar rotation chain.

  In the state shown in FIG. 6, the set of link members 1 a and 1 b are most distant from each other, and the lead-in wire We can be introduced between the set of link members 1 a and 1 b from the outer peripheral direction. From the state shown in FIG. 6, when one set of the crank members 1c and 1d is rotated clockwise as shown in FIG. 4 with the one link member 1a side as the rotation center, the set of link members 1a. • 1b can be close to each other. Then, the lead-in wire We can be gripped from the outer peripheral direction by a pair of link members 1a and 1b (see FIG. 4C).

  Referring to FIGS. 1 to 3, the retainer 2 has a hook 2 h at one end. The hook 2h can be retained at the support point of the house H. The retainer 2 has an operation lever 2r at the other end. The operation lever 2 r can be connected to the gripping tool 1.

  Referring to FIG. 1 or FIGS. 4 to 6, the gripping tool 1 includes a long extending rod 11 and an operation handle member 12. The extension rod 11 extends from one link member 1a. The extension rod 11 can be disposed below the lead-in line We along the lead-in line We. The extension rod 11 has a connecting ring 11r formed at the tip.

  1 or 4 to 6, the operation handle member 12 extends from one rotation center of one crank member 1 c toward the extension rod 11. A semicircular arc-shaped U-ring 12d is provided at the tip (see FIG. 6C). Referring to FIG. 6, the U-shaped ring 12d opens the lead-in wire We from the upper side so as to be freely introduced.

  Referring to FIG. 4 or FIG. 6, the one crank member 1c and the operation handle member 12 constitute a bell crank whose rotation center is the connection point of the one link member 1a. When the U-shaped ring 12d is locked to the lead-in line We from the state shown in FIG. 6 (see FIG. 4), the pair of link members 1a and 1b can be brought close to each other to grip the lead-in line We.

  Referring to FIG. 4 or FIG. 6, the parallel crank mechanism 1m further includes a torsion coil spring 1s. One end of the torsion coil spring 1s is locked to the intermediate portion of one crank member 1c. Further, the other end of the torsion coil spring 1s is locked to the intermediate portion of the one link member 1a. An intermediate portion of the torsion coil spring 1 s is wound around the proximal end portion of the operation handle member 12.

  Referring to FIG. 4 or FIG. 6, the torsion coil spring 1 s urges the force of the pair of link members 1 a and 1 b approaching each other. That is, the torsion coil spring 1s urges a force to grip the lead-in wire We by bringing the pair of link members 1a and 1b close to each other. When the U-shaped ring 12d is locked to the lead-in line We from the state shown in FIG. 6 (see FIG. 4), the lead-in line We can be gripped more strongly.

  Referring to FIGS. 1 to 3, the retractor 2 includes a shaft pin 2 p at the other end. The shaft pin 2p rotatably supports an intermediate portion of the operation lever 2r. On the other hand, the operating lever 2r has a retaining portion 21a on one end side. The retaining portion 21a is usually inclined to the hook 2h side with the shaft pin 2p as the center. The retaining portion 21a can retain the connecting ring 11r (see FIG. 2).

  With reference to FIG. 1, the hook 2 h is fastened to the support point of the house H, the gripping tool 1 and the retaining tool 2 are connected, and the pair of link members 1 a and 1 b grips the lead-in wire We, When the lead-in wire We is cut between the ring 12d and the support point, the gripping tool 1 and the retaining tool 2 can be stretched substantially in a straight line by the tension of the lead-in line We. And by removing the gripping tool 1 from the retainer 2, the lead-in wire We can be safely removed without being dragged abruptly by the lead-in wire We.

  With reference to FIG. 1, it is preferable that the removal apparatus 10 further includes a rope R for pulling the gripping tool 1 toward the house H side. Moreover, it is preferable that one link member 1a equips the bottom part with the mooring ring 13 to which the one end part side of the rope R is tied (refer FIG. 1 or FIGS. 4-6).

(Configuration of the retainer)
Next, the configuration of the retainer 2 according to the embodiment will be described. With reference to FIGS. 1 to 3, the retainer 2 further includes a tension coil spring 2 s. One end of the tension coil spring 2s is locked to the locking pin 24p. The locking pin 24p is attached to the other end side of the retainer 2. Further, the other end of the tension coil spring 2s is locked to a gripping portion 21b described later. The tension coil spring 2s biases the force that maintains the tilted state of the operation lever 2r.

  Referring to FIG. 2 or FIG. 3, the operation lever 2r has a grip portion 21b on the other end side. When the gripping portion 21b is rotated clockwise against the tension coil spring 2s from the state shown in FIG. 2, the operation lever 2r can be changed to the standing state as shown in FIG. Referring to FIG. 2 or FIG. 3, the retainer 2 includes a regulation pin 25p with which one plate thickness surface of the grip portion 21b abuts, and the clockwise rotation of the grip portion 21b is restricted.

  On the other hand, referring to FIG. 2 or FIG. 3, the retaining portion 21 a includes a first locking groove 211 and a second locking groove 212. The second locking groove 212 is adjacent to the first locking groove 211.

  Referring to FIG. 2, when the connecting ring 11r is locked in the first locking groove 211 when the operation lever 2r is in an inclined state, the connecting ring 11r is difficult to be detached from the retaining portion 21a.

  When the operation lever 2r is changed from the state shown in FIG. 2 to an upright state (see FIG. 3), the connecting ring 11r is moved from the first locking groove 211 to the second engagement along the uneven contour of the retaining portion 21a. It can move to the stop groove 212 (see FIG. 3).

  In the state shown in FIG. 3, the connecting ring 11r is locked to the second locking groove 212. However, since the second locking groove 212 is adjacent to the distal end portion of the retaining portion 21a, the connecting ring 11r. Can be easily detached from the retaining portion 21a.

  Referring to FIG. 2 or FIG. 3, the retainer 2 includes a pair of first support plates 21p and 21p, a pair of second support plates 22p and 22p, and a strip-shaped connecting plate 23p. The pair of first support plates 21p and 21p are arranged to face each other with a predetermined interval. A hook 2h is fixed to one end of the first support plates 21p and 21p using a bolt member 26b. One end of the connecting plate 23p is fixed to the other end of the first support plates 21p and 21p using a bolt member 26b.

  Referring to FIG. 2 or FIG. 3, the pair of second support plates 22p and 22p are arranged to face each other with a predetermined interval. The other end of the connecting plate 23p is fixed to one end of the second support plates 22p and 22p using a pair of bolt members 26b and 26b. Further, a part of the operation lever 2r is built in the other end of the second support plates 22p and 22p.

  Referring to FIG. 2 or FIG. 3, the connecting plate 23p has a plurality of mounting holes 23h through which the shaft portion of the bolt member 26b can be inserted. The bolt member 26b is inserted into the mounting hole 23h shown in FIG. 2 or FIG. 3, and the connecting plate 23p is connected by the pair of first support plates 21p and 21p and the pair of second support plates 22p and 22p. The total length of the tool 2 can be changed.

[Operation of lead wire removal device]
Next, the operation and effect of the removal device 10 will be described while explaining a method for removing the lead-in wire using the removal device 10 according to the embodiment.

  Referring to FIG. 1, the lead-in wire We is moored to the lead-in wire arm 9 through the bindless insulator Gi. The bindless insulator Gi is moored using the mooring hole 93h opened at the end of the lead wire arm 9. The lead-in wire We is supported by the bindless insulator Gi.

  With reference to FIG. 1, first, the hook 2h is moored to the lead wire arm 9 through the looped string St. Next, with reference to FIG. 1 or FIG. 2, the connecting ring 11r is fastened to the retaining portion 21a of the operation lever 2r. In this case, as shown in FIG. 2, the connecting ring 11 r is preferably locked in the first locking groove 211.

  Next, referring to FIG. 6, in a state where one link member 1a and the other link member 1b are separated from each other, that is, in a state where the distal end portion of the operation handle member 12 is lowered, a set of link members 1a and 1b. The lead-in wire We is introduced from the outer peripheral direction during the interval.

  Next, referring to FIG. 4, the pair of link members 1 a and 1 b are brought close to each other by lifting the distal end portion of the operation handle member 12 and introducing the lead-in wire We into the U-shaped ring 12 d from above. The lead-in wire We can be held. In this case, the parallel crank mechanism 1m includes the torsion coil spring 1s that urges the force of the pair of link members 1a and 1b approaching each other, and thus cooperates with the action of the “lever crank” of the operation handle member 12. Thus, the lead-in wire We can be gripped strongly.

  Next, referring to FIG. 1, the lead-in wire We is cut with a cutter or the like between the U-shaped ring 12d and the bindless insulator Gi. In a state where the lead-in wire We is cut between the U-shaped ring 12d and the bindless insulator Gi, the gripping tool 1 is gripping the lead-in wire We (see FIG. 4). 1 and the retainer 2 can be stretched on a substantially straight line (see FIG. 1).

  Next, referring to FIG. 3, the operation lever 2 r is operated to move the connecting ring 11 r to the second locking groove 212.

  Next, referring to FIG. 1, the other end portion of the rope R is gripped, and the connecting ring 11r is removed from the retaining portion 21a (see FIG. 3). Note that one end of the rope R is preferably tied to the mooring ring 13 in advance.

  Next, by drawing out the rope R, the lead-in line We can be lowered to the ground. And the lead-in line We can be removed.

  As described above, the method of removing the lead-in wire using the lead-in wire removal device 10 holds the lead-in wire We by locking the U-shaped ring 12d to the lead-in wire We and bringing the pair of link members 1a and 1b close to each other. At least a first step and a second step of cutting the lead wire We between the U-shaped ring 12d and the support point, and tensioning the gripping tool 1 and the retaining tool 2 in a substantially straight line by the tension of the lead wire We. It is out.

  In the removal device 10 according to the embodiment, even if the lead-in wire We is cut, the gripping tool 1 grips the lead-in wire We and stretches the lead-in wire We, so that the removal operator suddenly drags by the tension of the lead-in wire We. No worries

  The removal device 10 according to the embodiment can lower the lead-in wire We to the ground by releasing the connection between the gripping tool 1 and the retaining tool 2 and feeding the rope R. With the removal device 10 according to the embodiment, one worker can perform these operations on the ladder L, and work efficiency can be improved compared to the conventional removal device 8.

The following effects are expected from the lead-in wire removal device according to the present invention.
(1) Using a parallel crank mechanism, the lead-in wire can be gripped safely and with one touch.
(2) Even if tension acts on the cut lead-in wire, the lead-in wire can be drawn without applying an extra force.
(3) When the service line is lowered to the ground, an operator on the ground side becomes unnecessary.

  Although the present invention has disclosed a service line removal apparatus and a service line removal method that can safely and easily remove the service line, the service line can be safely and easily installed on the house side using the service line removal apparatus according to the present invention.

DESCRIPTION OF SYMBOLS 1 Grasping tool 1a * 1b One set of link member 1c * 1d One set of crank member 1m Parallel crank mechanism 2 Tightening tool 2h Hook 2p Shaft pin 2r Operation lever 10 Removal device (retraction device for lead-in wire)
11 Extending bar 11r Connecting ring 12 Operation handle member 12d U-shaped ring 21a Drainage part H House We Lead-in wire

Claims (4)

A lead-in wire removal device for cutting the lead-in wire drawn into the house from the house side and removing the lead-in wire,
A set of block-like link members arranged in parallel so as to be able to grip the lead-in wire from the outer peripheral direction, and one end arranged in parallel, with both ends pivotably connected to the set of link members. A gripping tool having a parallel crank mechanism composed of a set of band plate-like crank members;
It has a hook that can be fastened to a support point of a house at one end, and a long retaining tool that has an operation lever that can be connected to the gripping tool at the other end.
The gripping tool is
A long extending rod that extends from one of the link members and can be disposed below the lead line along the lead line,
A connecting ring formed at the tip of the extension rod;
An operation handle member having a semicircular arc U-shaped ring extending from one rotation center of one of the crank members toward the extending rod and opening the lead-in wire from the upper side thereof so as to be freely introduced from the top thereof; Have
The retractor has a shaft pin that rotatably supports an intermediate portion of the operation lever,
The operation lever is inclined toward the hook side with the shaft pin as a center, and has an anchoring portion on one end side capable of retaining the connection ring.
In a state in which the U-shaped ring is locked to the lead-in line, a set of the link members are brought close to each other to grip the lead-in line,
When the lead-in wire is cut between the U-shaped ring and the support point, the lead-in wire removal device can stretch the gripping tool and the retaining tool in a substantially straight line by the tension of the lead-in wire. The retractor further includes a tension coil spring that biases a force for maintaining the tilted state of the operation lever.
The operation lever has a grip portion on the other end side that changes the operation lever to an upright state against the tension coil spring,
The retaining part is
A first locking groove for locking the connecting ring in a state where the operating lever is inclined;
2. The retractor for a lead-in wire according to claim 1, further comprising a second locking groove adjacent to the first locking groove and in which the connecting ring is easily locked when the operation lever is in an upright state. A rope for pulling the gripping tool toward the house;
The pulling wire removal device according to claim 1 or 2, wherein the gripping tool has a mooring ring to which one end of the rope is tied at the bottom of one of the link members. A set of block-shaped link members arranged in parallel so as to be able to grip the lead-in wire from its outer peripheral direction, and a pair of arranged in parallel, with both ends rotatably connected to the set of link members. A gripping tool having a parallel crank mechanism composed of a band plate-like crank member, a hook that can be fastened to a support point of a house at one end, and an operation lever that can be connected to the gripping tool at the other end An elongated extending rod that extends from one of the link members and that can be disposed below the retracting line along the retracting line; and A connecting ring formed at the tip of the exit bar, and a semicircular arc-shaped U-shape extending from one rotation center of one of the crank members toward the extension bar and opening the lead-in wire from the upper side thereof An operation handle member having a ring at the tip, The tool has a shaft pin that rotatably supports an intermediate portion of the operation lever, and the operation lever is inclined to the hook side and has a retaining portion that can freely hold the connection ring on one end side. Using the removal device for the lead-in line, cutting the lead-in line drawn into the house from the house side, and a method for removing the lead-in line for removing the lead-in line,
A first step of locking the U-shaped ring to the lead-in line, bringing the set of link members close to each other, and gripping the lead-in line;
Cutting the lead-in line between the U-shaped ring and the support point, and including a second step of stretching the gripping tool and the retaining tool in a substantially straight line by the tension of the lead-in line. Removal method.

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