JP7124636B2 - Anti-bird protection tool for cross arm - Google Patents

Description

TECHNICAL FIELD The present invention relates to a bird protection device for a cross arm. In particular, a cross arm bird damage prevention tool suitable for indirect live line work that allows electrical work to be performed in an uninterrupted state using an insulated operating rod, and is attached to a cross arm fixed to a utility pole by birds such as crows or pigeons. The present invention relates to the structure of a cross arm bird damage prevention tool for preventing bird damage caused by nesting.

For example, a utility pole is equipped with a square pipe-shaped cross arm in a substantially horizontal state. The cross arm supports the overhead power line through the pin insulator. When birds such as crows or pigeons build nests on the cross arm fixed to the electric pole, there is concern that bird damage such as adhesion of bird feces to the electric pole will occur. For this reason, it is known to prevent birds from flying by by erecting a plurality of umbrella frame-shaped bird damage prevention devices, so-called umbrella bone-shaped bird damage prevention devices ( For example, see Patent Document 1).

On the other hand, it is also known to prevent birds from flying by installing a so-called needle mountain-shaped bird damage prevention device with a forest of needles with sharp tips on the upper surface of the cross arm (for example, patent Reference 2).

JP 2014-117269 A JP-A-11-289644

FIG. 9 is a side view showing the configuration of an umbrella bone type bird damage prevention device according to the prior art. FIG. 10 is a front view showing an enlarged state of an umbrella bone type bird damage prevention device according to the prior art. 9 and 10 of the present application correspond to FIGS. 1 and 2 of Patent Document 1. FIG.

Referring to FIG. 9 or 10, the umbrella bone type bird damage prevention device 8 according to the prior art includes a cylindrical main shaft member 81 extending straight and two annular branch members 82 . The bird damage prevention device 8 also has a plurality of branch rods 83 with different lengths and two tubular sleeves 84 .

9 or 10, the branch member 82 allows the main shaft member 81 to be inserted therein. A proximal end portion of the branch rod 83 is fixed to the outer circumference of the branch member 82 . The plurality of branch rods 83 are radially arranged in the centrifugal direction of the branch member 82 and are arranged such that their tip portions are inclined downward from the branch member 82 .

9 or 10, the sleeve 84 has the main shaft member 81 inserted therein. By interposing one sleeve 84 between the base end of the main shaft member 81 and the lower branch member 82, the height from the base end of the main shaft member 81 to the lower branch member 82 can be defined. Further, by interposing the other sleeve 84 between the upper branching member 82 and the lower branching member 82, the interval between the upper branching member 82 and the lower branching member 82 can be defined. Further, by fastening a ferrule 81a to the tip of the main shaft member 81, the constituent members of the bird damage prevention device 8 can be integrated.

9 or 10, the bird damage prevention device 8 further includes a support fitting 85. As shown in FIG. The support fitting 85 has an L-shaped bent support member 85a and an L-shaped bent bolt member 85b. Further, the support fitting 85 has a nut member 85c and a triangular pressing member 85d.

Referring to FIG. 10, the support member 85a has an insertion hole, through which the base end of the main shaft member 81 can be inserted, opened on the tip side of one piece. By inserting the base end portion of the main shaft member 81 through the insertion hole and fastening the nut member 91n to the base end portion of the main shaft member 81, the bird damage prevention device 8 can be fixed to the front end portion of the support member 85a. The base end side of one piece of the support member 85a is placed on the upper surface of the arm A, and the other piece of the support member 85a is arranged to face the side surface of the arm A. As shown in FIG.

Referring to FIG. 10, one end of the bolt member 85b is engaged with one piece of the support member 85a. Also, the bolt member 85b has a male screw portion screwed to the other end side. In a state in which the other piece of the support member 85a and one end of the bolt member 85b are arranged to face both side surfaces of the cross arm A, the other end of the bolt member 85b passes through the pressing member 85d and extends through the support member 85a. It protrudes from the other piece. By fastening the nut member 85c to the male threaded portion of the bolt member 85b, the bird damage prevention device 8 can be supported on the arm A through the support fitting 85. As shown in FIG. The upper surface of the pressing member 85d is in contact with the lower surface of the cross arm A. As shown in FIG.

Referring to FIG. 10, cross arm A is cantilevered on utility pole P. As shown in FIG. Moreover, the cross arm A is arranged in a substantially horizontal state. The cross arm A has three pin insulators Pi arranged at approximately equal intervals. Referring to FIG. 9, a pair of arms A and A are arranged substantially parallel to each other with a utility pole P interposed therebetween.

Referring to FIG. 9 or FIG. 10, the bird damage prevention device 8 according to Patent Document 1 is arranged in the central portion of a pair of adjacent pin insulators Pi and Pi, and is arranged between a pair of cross arms A and A facing each other. Since they are arranged in the central part, the tips of the plurality of branch rods 83 do not contact the pin insulators Pi, and the plurality of branch rods 83 are arranged radially so as to cover the area inside the four pin insulators Pi. , it is possible to reliably prevent nesting regardless of the size of birds.

Further, referring to FIG. 9 or 10, the bird damage prevention device 8 according to Patent Document 1 can be provided with a plurality of branch rods 83 spaced apart in the vertical direction. can be made smaller to more reliably prevent nesting by flying birds.

FIG. 11 is a perspective view showing the configuration of a needle-shaped bird damage prevention device according to the prior art, and is a diagram showing the state in which the needle-shaped bird damage prevention device is attached to a cross arm. FIG. 12 is a perspective exploded view showing the configuration of a needle-shaped bird damage prevention device according to the prior art.

FIG. 13 is a right side view of the needle-shaped bird damage preventive device according to the prior art, and is a state change diagram showing a procedure for attaching the needle-shaped bird damage preventive device to a cross arm. FIG. 14 is a mounting diagram of a cross arm to which a pincushion-shaped bird damage prevention device according to the prior art is to be attached.

11 and 12 of the present application correspond to FIGS. 5 and 2 of Patent Document 2. FIG. 13 of the present application corresponds to FIG. 4 of Patent Document 2. FIG.

Referring to FIG. 11 or FIG. 12 , the pincushion-shaped bird damage prevention device 9 according to the prior art is composed of a prevention device main body 91 and a C-shaped support fitting 92 . The preventive device main body 91 can prevent birds from flying into the cross arm A and nesting. The protector main body 91 is molded from an insulating synthetic resin. The support fitting 92 can attach the preventive tool main body 91 to the arm A and support the preventive tool main body 91 .

Referring to FIG. 11 or FIG. 12, the preventive device main body 91 includes a strip plate-like lattice plate 91g and a plurality of sharp needles 91p. The lattice plate 91g is composed of a plurality of vertical beam members 911 extending in the longitudinal direction and a plurality of horizontal beam members 912 substantially perpendicular to the vertical beam members 911 . The needle body 91 p is erected from the intersection of the vertical beam member 911 and the horizontal beam member 912 or from the edge of the horizontal beam member 912 .

11 or 12, the support fitting 92 has a pair of gripping pieces 92a and 92b and a connecting piece 92c. A pair of gripping pieces 92a and 92b are arranged substantially parallel with a predetermined interval. A pair of gripping pieces 92a and 92b have bolt insertion holes 92h at their distal ends. The connecting piece 92c connects the base ends of the pair of gripping pieces 92a and 92b.

Referring to FIG. 11 or 12, the cross arm A can be introduced from the lateral direction between the pair of gripping pieces 92a and 92b. After introducing the cross arm A between the pair of gripping pieces 92a and 92b, the bolt member 93 is inserted into the bolt insertion hole 92h, and the nut member N is fastened to the tip end side of the bolt member 93. can be fixed to arm A.

Referring to FIG. 18 or 19, the support fitting 92 further includes a rectangular clamping plate 94. As shown in FIG. The clamping plate 94 is welded to the upper surface of one of the gripping pieces 92a. The clamping plate 94 has a pair of hook-shaped fitting pieces 94a, 94a erected from one side thereof. Also, the clamping plate 94 has a pair of hook-shaped locking pieces 94b, 94b erected from the other side. The fitting piece 94a and the locking piece 94b are arranged to face each other.

11 or 12, the distance between the fitting piece 94a and the locking piece 94b is such that a pair of vertical bars 911, 911 formed on the preventive device main body 91 are fitted. . After fitting one of the vertical beam members 911 to the pair of fitting pieces 94a, 94a, the other vertical beam member 911 is pushed into the pair of locking pieces 94b, 94b, so that the preventive tool main body 91 is held by the clamping plate 94. can be attached to

Next, a procedure for attaching the bird damage prevention device 9 thus constructed to the cross arm A will be described. First, referring to FIG. 11, a long lattice plate 91g is cut so as to match the length from the pin insulator Pi projecting from the cross arm A to the end of the cross arm A to prevent The tool body 91 is measured. Then, the holding plate 94 of the support fitting 92 is attached to the lower surface of the lattice plate 91g at the central position of the preventive device main body 91 measured in this way in the longitudinal direction.

As shown in FIG. 13(A), the above-described mounting procedure arranges the support bracket 92 below the preventive device main body 91 . Next, by pressing the lattice plate 91g against the clamping plate 94 of the support fitting 92, a pair of vertical bars 911 can be fitted between the pair of fitting pieces 94a (see FIG. 11). ). Then, as shown in FIG. 13(B), the support fitting 92 can support the preventive tool main body 91 .

Next, referring to FIG. 13(C), the connecting piece 92c of the support fitting 92 is clamped by the tool portion 52 provided at the tip of the insulation operating rod 5. Next, as shown in FIG. Next, by manipulating the insulating operating rod 5, as shown in FIG. 13(D), the cross arm A is introduced between the pair of gripping pieces 92a and 92b, and the support fitting 92 is latched.

Next, referring to FIG. 13(E), using the insulating operation rod 5, the bolt member 93 is inserted from above into the bolt insertion holes 92h opened in the gripping pieces 92a and 92b. A nut member N is attached to a box wrench attached to the tip of an insulation operation rod (not shown), and the insulation operation rod (not shown) is operated to remove the bolt from the lower side of the grip piece 92b as shown in FIG. 13(F). A nut member N can be fastened to the member 93 . As a result, the pincushion-shaped bird damage prevention device 9 can be fixed to the upper surface of the cross arm A, as shown in FIG.

Comparing the umbrella-bone type bird damage prevention device 8 shown in FIG. 9 or FIG. 10 with the pincushion-shaped bird damage prevention device 9 shown in FIGS. Compared to the pincushion-shaped bird damage prevention tool 9, the structure is complicated, so the unit price is generally high. Therefore, it is preferable to arrange a plurality of pincushion-shaped bird damage prevention devices 9 on the cross arm in terms of installation cost.

Further, comparing the umbrella-bone type bird damage prevention device 8 with the pincushion-shaped bird damage prevention device 9, the umbrella-bone type bird damage prevention device 8 has a plurality of bird damage prevention devices compared to the pincushion-shaped bird damage prevention device 9. The outer shape of the branch rod 83 is large, and it is often difficult to use an insulated operation rod for indirect live line work to attach it to a cross arm in which a rim line bypassing the cross arm is arranged. be.

On the other hand, referring to FIG. 14, the utility pole P supports the central portion of the cross arm A. As shown in FIG. Two pin insulators Pi and Pi are arranged on one end side of the cross arm A. As shown in FIG. One pin insulator Pi is arranged at the end of the cross arm A on the one end side. The other pin insulator Pi is arranged on the one end side of the cross arm A near the utility pole P. As shown in FIG. On the other end side of the cross arm A, one pin insulator Pi is arranged at the end.

Also, referring to FIG. 14, the utility pole P has an inclined arm tie At. The arm tie At is connected to an arm tie band Bt tightened to the utility pole P at one end thereof. The other end of the arm tie At is connected to the center of the cross arm A on the other end side. By supporting the cross arm A on the utility pole P with the arm tie At, the inclination of the cross arm A can be suppressed.

By the way, as described above, the pincushion-shaped bird damage prevention device 9 according to Patent Document 2 attaches the support metal fitting 92 to the central position of the prevention device main body 91 in the longitudinal direction (see FIG. 11), and then attaches the support metal fitting 92 to the arm. It is fixed to Gold A. Therefore, referring to FIG. 14, on the other end side of the cross arm A, the support fitting 92 interferes with the arm tie At, making it difficult to attach the bird damage prevention device 9 .

Referring to FIG. 14, the bird damage prevention device 9 is lowered to the ground so that the support metal fitting 92 does not interfere with the arm tie At, the mounting position of the support metal fitting 92 with respect to the prevention device main body 91 is corrected, and the bird damage prevention device 92 is mounted again. Since the preventive tool 9 is attached to the cross arm A, there is a problem that the work efficiency is lowered.

There is a demand for a needle mountain-shaped bird damage prevention device for a cross arm that can be easily attached to a cross arm reinforced with an arm tie using an insulated operating rod for indirect live line construction. And the above can be said to be the subject of the present invention.

The present invention has been made in view of such problems. The purpose is to provide protection.

The present inventor fixed a support metal fitting to a cross arm reinforced with an arm tie, and connected the needle mountain-shaped prevention tool main body to the support metal fitting so as to be slidable along the longitudinal direction of the cross arm. Therefore, the inventors thought that the above problems could be solved, and based on this, they came to invent the following new pincushion-shaped bird damage prevention tool for a cross arm.

(1) A bird damage prevention device for a cross arm according to the present invention is a needle-shaped bird damage prevention device for a cross arm that can be installed on a cross arm reinforced with an arm tie on at least one end side, comprising a strip-shaped substrate; , a protective device main body composed of a plurality of needles with sharp tips extending from the substrate in the longitudinal direction, and a pair of gripping pieces arranged opposite to each other such that the cross arm can be freely introduced from the side surface thereof; a C-shaped support fitting having a connecting piece connecting the base ends of the gripping pieces of the base plate, the substrate having a rectangular guide groove drilled from the bottom surface thereof, and the support fitting having one of the a rectangular guide rail erected from the grip piece, fitted in the guide groove to support the protector body, and guide the protector body slidably along the longitudinal direction of the cross arm; and a gripping portion that protrudes from the other gripping piece and can be gripped by an insulated operating rod for indirect hot wire construction.

(2) The guide groove has a V groove formed on one inner wall along the longitudinal direction and an arcuate groove formed on the other inner wall along the longitudinal direction, and the guide rail has one side surface. It is preferable to have a mountain-shaped ridge that is formed on the side surface and fits into the V-groove, and a semi-arc-shaped ridge that is formed on the other side surface and fits into the arc-shaped groove.

(3) The support fitting includes a rotating shaft having both ends rotatably connected to one of the gripping pieces, a bolt member having a T-shaped head joined to the rotating shaft, and the bolt member. one or more nut members that can be screwed together with the threaded portion; It is preferable that the support fitting can be fixed to the cross arm by fastening the nut member to the other gripping piece from the state where the bolt member is introduced into the portion.

A bird damage prevention device for a cross arm according to the present invention comprises a prevention device main body composed of a band plate-shaped substrate and a plurality of needles arranged on the substrate, and a C-shaped support fitting that can be fixed to the cross arm. The tool body has a rectangular guide groove, and the support fitting has a guide rail that fits into the guide groove and guides the protector body slidably along the longitudinal direction of the cross arm. The bird protection device for the cross arm can be installed on the cross arm without interfering with the cross arm.

1 is a perspective view showing the configuration of a cross arm bird damage prevention device according to an embodiment of the present invention; FIG. Fig. 3 is an enlarged perspective view of a main part of the cross arm bird damage prevention device according to the embodiment; 3(A) is a front view of the support metal fitting, FIG. 3(B) is a plan view of the support metal fitting, and FIG. 3(C) is a right side view of the support fitting, FIG. 3(D) is a left side view of the support fitting, and FIG. 3(E) is a bottom view of the support fitting. FIG. 4 is a front view showing a usage state of the cross arm bird damage prevention device according to the embodiment, and is a state diagram before the cross arm bird damage prevention device is attached to the cross arm. FIG. 4 is a front view showing the usage state of the cross-arm bird damage prevention device according to the embodiment, and is a state diagram showing the cross-arm bird damage prevention device attached to the cross arm. FIG. 4 is a mounting diagram of a cross arm to which the bird damage prevention tool for cross arm according to the embodiment is to be attached; FIG. 2 is a front view showing the structure of an insulating operation rod for operating the bird damage prevention device for cross arm according to the present invention; FIG. 8 is an enlarged front view of the main part of FIG. 7; FIG. 2 is a side view showing the configuration of a conventional umbrella bone-type bird damage prevention device. FIG. 2 is a front view showing an enlarged state of an umbrella-bone type bird damage prevention device according to the prior art; FIG. 10 is a perspective view showing the configuration of a pincushion-shaped bird damage prevention device according to the prior art, and is a state diagram showing the pinion-shaped bird damage prevention device attached to a cross arm. 1 is a perspective exploded view showing the configuration of a needle-shaped bird damage prevention device according to the prior art; FIG. It is a right side view of the pincushion-shaped bird damage prevention tool by a prior art, and is a state change figure which shows the procedure which attaches a pincushion-shaped bird damage prevention tool to a cross arm. FIG. 2 is a mounting diagram of a cross arm to which a pincushion-shaped bird damage prevention device according to the prior art is to be attached.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

Before describing the configuration of the cross arm for preventing bird damage according to the present invention, the configuration of an insulated operation rod for operating the cross arm for preventing bird damage according to the present invention will be described.

(Configuration of insulated operating rod)
7 or 8, the insulated operating rod 5 is composed of an elongated operating rod 51 and a tool portion 52. As shown in FIG. The insulating operating rod 5 also has an operating rod 53 . The tool portion 52 is attached to the tip portion of the operating rod 51 .

7 or 8, the tool portion 52 comprises a pair of curved gripping arms 5a and 5b that open and close. One of the gripping arms 5a is a fixed arm with a base end fixed, and the other gripping arm 5b rotates around a rotating shaft 5c provided at the base end of the one gripping arm 5a. It has a movable arm.

Referring to FIG. 7, the operating rod 53 is held along the operating rod 51. As shown in FIG. The tip of the operating rod 53 is rotatably connected to the other gripping arm 5b. By operating the operating lever 54 provided at the proximal end of the operating rod 53, the gripping arm 5b can be opened and closed with respect to the gripping arm 5a. The insulated operating rod 5 is made of a plastic pipe or the like having insulating properties in the intermediate portions of the operating rod 51 and the operating rod 53, and ensures insulation suitable for the indirect live wire construction method.

Referring to FIG. 7, gripping the operating lever 54 and bringing the operating lever 54 closer to the operating rod 51 allows the gripping arm 5b to close with respect to the gripping arm 5a. When the operating lever 54 is released, the force of a spring (not shown) connected to the operating lever 54 can open one gripping arm 5a with respect to the other gripping arm 5b. FIG. 7 or FIG. 8 shows a state in which the gripping arm 5b is opened to the maximum with respect to the gripping arm 5a.

7 or 8, one gripping arm 5a projects a tapered gripping claw 51a. The gripping claws 51a form a gripping surface 50a. The gripping surface 50a is formed substantially parallel along the centrifugal direction from the center of rotation of the rotating shaft 5c. Similarly, the other gripping arm 5b protrudes a tapered gripping claw 51b. The gripping claws 51b form a gripping surface 50b. The gripping surface 50b is arranged with a predetermined open angle from the gripping surface 50a. Referring to FIG. 7 or 8, when the operating lever 54 is gripped, the gripping surface 50b can be brought closer to the gripping surface 50a.

The insulating operating rod 5 shown in FIG. 7 or 8 is a so-called "insulating rod" that can grip a high-voltage distribution line or the like placed at a high place with a pair of gripping claws 51a and 51b.

[Configuration of cross arm bird damage prevention device]
(overall structure)
Next, the configuration of the cross arm bird damage prevention device according to one embodiment of the present invention will be described. 1 to 6, a cross arm A bird damage prevention device (hereinafter referred to as a bird damage prevention device) 10 according to an embodiment of the present invention can be installed on a cross arm A. As shown in FIG. The cross arm A is mounted on the utility pole P in a substantially horizontal state. Also, the cross arm A is reinforced with an arm tie At at one end.

1 to 6, by installing the bird damage prevention device 10 on the cross arm A, it is possible to prevent birds from flying in and nesting on the cross arm A. As shown in FIG.

Referring to FIGS. 1 to 6, a bird damage prevention device 10 includes a prevention device body 1 and a C-shaped support fitting 2. As shown in FIG. The protector main body 1 is composed of a strip-shaped substrate 1b and a plurality of cone-shaped needles 1p with pointed ends. A plurality of needles 1p are bristling in the longitudinal direction from the substrate 1b. It is preferable that the substrate 1b and the plurality of needles 1p are integrally made of insulating synthetic resin.

1 to 5, the support fitting 2 has a pair of gripping pieces 2a and 2b and a connecting piece 2c. A pair of gripping pieces 2a and 2b are arranged substantially parallel with a predetermined interval. The cross arm A can be introduced from the side surface of the pair of gripping pieces 2a and 2b. The connecting piece 2c connects the base ends of the pair of gripping pieces 2a and 2b.

Referring to FIG. 2 or FIG. 3(A), the substrate 1b has a rectangular guide groove 11. As shown in FIG. The guide groove 11 is bored from the bottom surface of the substrate 1b. On the other hand, the support bracket 2 has rectangular guide rails 21 . The guide rail 21 is erected from one gripping piece 2a via a support 2p.

2 or 3A, the guide rail 21 can be fitted into the guide groove 11. As shown in FIG. By fitting the guide rails 21 into the guide grooves 11, the protector main body 1 can be supported. Further, by fitting the guide rail 21 into the guide groove 11, the protector main body 1 can be slidably guided along the longitudinal direction of the cross arm A.

For example, referring to FIG. 2, the guide groove 11 can be composed of a V groove 11v and an arcuate groove 11s. The V-groove 11v is formed on one inner wall of the guide groove 11 along the longitudinal direction. A circular arc groove 11s is formed in the other inner wall along the longitudinal direction of the guide groove 11. As shown in FIG.

On the other hand, referring to FIG. 2, the guide rail 21 has a mountain-shaped ridge 21m that fits into the V-groove 11v on one side surface. Further, the guide rail 21 has a semi-arc-shaped ridge 21s that fits into the arc-shaped groove 11s formed on the other side surface. The guide rail 21 can be introduced into the guide groove 11 by opening the V groove 11v and the arcuate groove 11s in opposite directions at the central portion of the guide groove 11 . Preferably, the mountain-shaped ridges 21m are first introduced into the V-grooves 11v, and the semi-arc-shaped ridges 21s are introduced into the arc-shaped grooves 11s later.

2 to 5, the support metal fitting 2 has a gripping portion 22 protruding from the other gripping piece 2b. As an entity, the grip portion 22 is configured by a rectangular plate welded to the outer surface of the connecting piece 2c (see FIG. 3(D)). The gripping portion 22 can be gripped by the insulating operation rod 5 for indirect live line construction (see FIG. 7 or 8).

Referring to FIGS. 1 to 6, a bird damage prevention device 10 according to the embodiment includes a prevention device main body 1 composed of a band plate-like substrate 1b and a plurality of needles 1p standing on the substrate 1b, and fixed to a cross arm A. The protector body 1 has a rectangular guide groove 11, the support bracket 2 is fitted in the guide groove 11, and extends along the longitudinal direction of the arm A to prevent Since it has a guide rail 21 for slidably guiding the tool body 1, the bird damage prevention tool 10 can be installed on the arm A without interfering with the arm tie At (see FIG. 1 or FIG. 6).

(Structure of support bracket)
Next, the configuration of the support bracket 2 according to the embodiment will be described. 1 to 5, the support fitting 2 further includes a pivot shaft 23s, a bolt member 23, and one or more nut members N. As shown in FIG. 23 s of rotating shafts are rotatably connected with the bending piece formed in one holding piece 2a at the both ends. The bolt member 23 has its head joined to the rotary shaft 23s in a T shape. The nut member N can be screwed onto the threaded portion of the bolt member 23 .

Referring to FIG. 2 or FIG. 3(E), the other gripping piece 2b has a notch portion 23d which is cut out from the tip edge. The bolt member 23 can be introduced from the outer peripheral direction into the notch portion 23d.

3 or 5, the support metal fitting 2 can be fixed to the arm A by fastening the nut member N to the other gripping piece 2b in a state where the bolt member 23 is introduced into the notch portion 23d.

[Action of bird damage prevention tool for cross arm]
Next, the operation and effects of the bird damage prevention device 10 will be described while explaining the operation procedure of the bird damage prevention device 10 according to the embodiment.

First, referring to FIG. 4, the gripping portion 22 is gripped by the pair of gripping arms 5a and 5b while the bolt member 23 is standing. Next, by operating the insulation operating rod 5, the cross arm A is introduced from the side surface between the pair of gripping pieces 2a and 2b.

Next, referring to FIG. 5, the bolt member 23 is rotated clockwise to introduce the tip portion side of the bolt member 23 into the notch portion 23d (see FIG. 2). Next, referring to FIG. 5, by fastening the nut member N to the bolt member 23, the cross arm A can be held between the pair of gripping pieces 2a and 2b. The support metal fitting 2 according to the embodiment has the advantage that the operation is easier than the conventional support metal fitting 92 because the bolt member 23 is rotatably connected to the grip piece 2a.

Referring to FIG. 1 or FIG. 6, the utility pole P supports the cross arm A at its central portion. Two pin insulators Pi and Pi are arranged on one end side of the cross arm A. As shown in FIG. One pin insulator Pi is arranged at the end of the cross arm A on the one end side. The other pin insulator Pi is arranged on the one end side of the cross arm A near the utility pole P. As shown in FIG. On the other end side of the cross arm A, one pin insulator Pi is arranged at the end.

Also, referring to FIG. 1 or FIG. 6, the utility pole P has an inclined arm tie At. The arm tie At is connected to an arm tie band Bt tightened to the utility pole P at one end thereof. The other end of the arm tie At is connected to the center of the cross arm A on the other end side. By supporting the cross arm A on the utility pole P with the arm tie At, the inclination of the cross arm A can be suppressed.

Referring to FIG. 1 or FIG. 6, the bird damage prevention tool 10 according to the embodiment can fix the support fitting 2 to the arm A so as not to interfere with the arm tie At. By sliding the protector main body 1 with respect to the support fitting 2, the protector main body 1 can be arranged without interfering with the pin insulator Pi.

The following effects can be expected from the bird damage prevention device for cross arm according to the present invention.
(1) By using an insulated operating rod for indirect hot-line work, a pincushion-shaped bird damage prevention device can be easily attached to a cross arm.
(2) After attaching the pincushion-shaped bird damage prevention device to the cross arm, the device main body can be slid to the optimum position.
(3) It can be easily attached to a cross arm reinforced with an arm tie.

REFERENCE SIGNS LIST 1 protector body 1b substrate 1p needle body 2 support fitting 2a and 2b pair of gripping pieces 2c connecting piece 5 insulated operation rod 10 bird damage prevention device (bird damage prevention device for cross arm)
11 guide groove 21 guide rail 22 grip portion A cross arm At arm tie

Claims (3)

A pinion-shaped bird damage prevention tool for a cross arm that can be installed on a cross arm that is reinforced with an arm tie on at least one end side,
a strip-shaped substrate, and a protector main body composed of a plurality of needles with pointed tips extending from the substrate in the longitudinal direction;
A C-shaped support metal fitting having a pair of gripping pieces facing each other so that the arm can be freely introduced from the side surface thereof, and a connecting piece connecting the base ends of the gripping pieces,
The substrate has a rectangular guide groove drilled from its bottom surface,
The support bracket is
A rectangular guide rail erected from one of the gripping pieces and fitted into the guide groove to support the protector body and guide the protector body slidably along the longitudinal direction of the cross arm. When,
A bird damage prevention tool for a cross arm, comprising: a gripping portion protruding from the other gripping piece and capable of being gripped by an insulated operating rod for indirect hot wire construction. The guide groove is
a V-groove formed in one inner wall along the longitudinal direction;
and an arcuate groove formed in the other inner wall along the longitudinal direction,
The guide rail is
a mountain-shaped ridge formed on one side surface and fitted into the V-groove;
2. A bird damage prevention device for a cross arm according to claim 1, further comprising a semi-circular ridge formed on the other side surface and fitted into said circular arc groove. The support bracket is
a rotating shaft having both ends rotatably connected to one of the gripping pieces;
a bolt member having a T-shaped head portion joined to the rotating shaft;
one or more nut members that can be screwed together with the threaded portion of the bolt member;
The other gripping piece has a notch portion cut out from the tip edge to allow the bolt member to be introduced from the outer peripheral direction,
3. The cross arm according to claim 1, wherein the support fitting can be fixed to the cross arm by fastening the nut member to the other gripping piece from a state in which the bolt member is introduced into the notch. Bird damage prevention tool.

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