JP7155928B2 - 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. 15 is an enlarged right side view of the main part of FIG. 14. FIG.

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. 11 or 12, 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, arm A supports three lightning arresters Ar. A lightning arrester Ar is arranged adjacent to the pin insulator Pi. Two lightning arresters Ar and Ar are arranged on one end side of the arm A. One lightning arrester Ar is arranged on one end side of the cross arm A. As shown in FIG. The other lightning arrester Ar is arranged near the utility pole P on the one end side of the arm A. At the other end of cross arm A, one lightning arrester Ar is arranged at the end.

Referring to FIG. 15, lightning arrester Ar is supported by cross arm A via support band Bs and arrester mounting bracket Br. A branch line (not shown) moored to the pin insulator Pi is connected to the line-side terminal T1 of the lightning arrester Ar. A ground line (not shown) is connected to the ground terminal T2 of the lightning arrester Ar. The terminal end of the ground wire (not shown) is grounded to the ground. With the above configuration, the lightning arrester Ar can protect power distribution equipment from transient abnormal high voltage caused by lightning or the like.

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 one end side of the cross arm A, the preventer main body 91 interferes with the two arrester mounting metal fittings Br and Br, making it difficult to mount the bird damage preventer 9. There is Moreover, at the other end of the cross arm A, there is a problem that the preventive device main body 91 interferes with the arrester mounting metal fitting Br at the end, making it difficult to mount the bird damage preventive device 9 .

Referring to FIG. 14, the end of the protector body 91 is cut on the ground so that the protector body 91 does not interfere with the arrester mounting bracket Br of the lightning arrester Ar adjacent to the pin insulator Pi. Therefore, there is a problem that work efficiency is lowered.

There is a need for a needle mountain-shaped cross arm bird damage prevention device that can be easily attached to a cross arm that supports a plurality of pin insulators and lightning arresters adjacent to the pin insulators using an insulated operating rod for indirect live line construction. And the above can be said to be the subject of the present invention.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems. To provide a pincushion-shaped cross-arm bird damage prevention tool that can be used.

The present inventor fixed a support metal fitting to a cross arm supporting a plurality of lightning arresters, and arranged a pair of needle mountain-shaped anti-movement tool main bodies against the needle mountain-shaped anti-fixation tool main body fixed to the support metal fitting so that the longitudinal direction of the cross arm was fixed. We think that the above problem can be solved by connecting both sides of the fixing device body slidably along the direction. I ended up inventing a tool.

(1) A bird damage prevention device for a cross arm according to the present invention is a needle mountain-shaped bird damage prevention device for a cross arm that can be installed on a cross arm that supports a plurality of pin insulators and a lightning arrester adjacent to the pin insulators. , a band plate-shaped first substrate, a fixation prevention tool main body composed of a plurality of needle bodies with sharp tips standing in the longitudinal direction from the first substrate, and substantially the same length and width as the first substrate and a plurality of needle bodies with pointed tips standing in a forest in the longitudinal direction from the second board, and along the longitudinal direction of the cross arm, the first A pair of anti-movement tool bodies slidably connected to a substrate, a pair of gripping pieces facing each other so that the cross arm can be introduced from the side surface of the gripping pieces, and a connection connecting the base ends of these gripping pieces. C-shaped support metal fittings having pieces, wherein the support metal fittings are erected from one of the gripping pieces to support the first substrate from its bottom side, and protrude from the other gripping piece. , and a gripping portion that can be gripped by an insulated operating rod for indirect hot-line construction.

(2) Preferably, the first board has dovetail groove rails protruding from both side surfaces thereof, and the second board has dovetail grooves on one side surface that are fitted to the dovetail groove rails. .

(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.

In the cross arm bird damage prevention device according to the present invention, a support metal fitting is fixed to a cross arm supporting a plurality of lightning arresters, and a pair of needle mountain-shaped anti-movement devices are attached to a needle mountain-shaped anti-locking device main body fixed to the support metal fitting. Since the device body is slidably connected to both sides of the fixing prevention device body along the longitudinal direction of the cross arm, the bird damage prevention device for the cross arm is installed on the cross arm without interfering with a plurality of lightning arresters. can.

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. 15 is an enlarged right side view of the main part of FIG. 14; FIG.

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. Components assigned the same reference numerals as those used in the prior art have the same function, and therefore the description may be omitted below.

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. Arm A also supports three pin insulators Pi and a lightning arrestor Ar adjacent to pin insulators Pi.

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.

1 to 6, the bird damage prevention device 10 includes a fixed prevention device main body 1, a pair of movement prevention device main bodies 2, 2, and a C-shaped support fitting 3. As shown in FIG. The fixation prevention tool main body 1 is composed of a strip-shaped first 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 first substrate 1b. It is preferable that the first substrate 1b and the plurality of needles 1p are integrally made of insulating synthetic resin.

Referring to FIGS. 1 to 6, the movement prevention tool main body 2 is composed of a second strip-shaped substrate 2b and a plurality of cone-shaped needles 2p with pointed ends. A plurality of needles 2p are bristling in the longitudinal direction from the second substrate 2b. It is preferable that the second substrate 2b and the plurality of needles 2p are integrally made of insulating synthetic resin.

1 to 6, the second substrate 2b forms substantially the same length and width as the first substrate 1b. In the embodiment, the number and shape of the needles 2p are the same as the number and shape of the needles 1p. The number and shape of the needles 2p may be different from the number and shape of the needles 1p.

1 to 5, the support fitting 3 has a pair of gripping pieces 3a and 3b and a connecting piece 3c. A pair of gripping pieces 3a and 3b 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 3a and 3b. The connecting piece 3c connects the base ends of the pair of gripping pieces 3a and 3b.

Referring to FIG. 2 or FIG. 3A, the first substrate 1b has dovetail groove rails 1r, 1r projecting from both side surfaces thereof. The second substrate 2b has a dovetail groove 2d on one side surface. The dovetail rail 1r can be fitted into the dovetail groove 2d. By fitting the dovetail groove rail 1r into the dovetail groove 2d, the pair of movement preventive tool main bodies 2, 2 can be supported with respect to the fixing preventive tool main body 1. As shown in FIG. Also, by fitting the dovetail groove rail 1r into the dovetail groove 2d, the pair of movement preventive tool bodies 2, 2 can be guided along the longitudinal direction of the cross arm A with respect to the fixation preventive tool body 1. As shown in FIG.

For example, referring to FIG. 2, the dovetail groove 2d can be composed of a V groove 21v and an arcuate groove 21s. The V-groove 21v is formed on one inner wall along the longitudinal direction of the dovetail groove 2d. Also, the arcuate groove 21s is formed in the other inner wall along the longitudinal direction of the dovetail groove 2d.

2 to 5, the support fitting 3 has a support portion 31 erected from one gripping piece 3a. As an entity, the support portion 31 is configured by a cylindrical member. The support portion 31 supports the first substrate 1b from its bottom side.

On the other hand, referring to FIGS. 2 to 5, the support fitting 3 has a gripping portion 32 protruding from the other gripping piece 3b. As an entity, the grip portion 32 is configured by a rectangular plate welded to the outer surface of the connecting piece 3c (see FIG. 3(D)). The gripping portion 32 can be gripped by the insulated operating rod 5 for indirect hot wire construction (see FIG. 7 or 8).

Referring to FIGS. 1 to 6, a bird damage prevention device 10 according to the embodiment includes a first substrate 1b in the form of a strip plate, and a fixing prevention device main body 1 composed of a plurality of needles 1p standing on the first substrate 1b. , a second plate-shaped substrate 2b, a pair of anti-movement device bodies 2, 2, which are composed of a plurality of needles 2p standing on the second substrate 2b, and a C-shaped support fitting that can be fixed to the cross arm A. 3, a support metal fitting 3 is fixed to a cross arm A supporting a plurality of lightning arresters Ar, and a pair of needle mountain-shaped anti-movement devices are attached to a needle mountain-shaped anti-locking device main body 1 fixed to the support metal fitting 3. Since the main bodies 2, 2 are slidably connected to both side surfaces of the fixing prevention tool main body 1 along the longitudinal direction of the arm A, the bird damage prevention tool 10 can be attached to the arm without interfering with the plurality of lightning arresters Ar. Can be placed on Gold A.

(Structure of support bracket)
Next, the configuration of the support bracket 3 according to the embodiment will be described. 1 to 5, the support fitting 3 further includes a pivot shaft 33s, a bolt member 33, and one or more nut members N. As shown in FIG. 33 s of rotating shafts are rotatably connected with the bending piece formed in one holding piece 3a at the both ends. The bolt member 33 has its head joined to the rotation shaft 33s in a T shape. The nut member N can be screwed onto the threaded portion of the bolt member 33 .

Referring to FIG. 2 or FIG. 3(E), the other gripping piece 3b has a notch portion 33d cut from the tip edge. The bolt member 33 can be introduced from the outer peripheral direction into the notch portion 33d.

3 or 5, the support fitting 3 can be fixed to the arm A by fastening the nut member N to the other gripping piece 3b in a state where the bolt member 33 is introduced into the notch 33d.

[Action of bird damage prevention device 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 32 is gripped by the pair of gripping arms 5a and 5b while the bolt member 33 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 3a and 3b.

Next, referring to FIG. 5, the bolt member 33 is rotated clockwise to introduce the tip portion side of the bolt member 33 into the notch portion 33d (see FIG. 2). Next, referring to FIG. 5, by fastening the nut member N to the bolt member 33, the cross arm A can be held between the pair of gripping pieces 3a and 3b. The support metal fitting 3 according to the embodiment has the advantage that the operation is easier than the conventional support metal fitting 92 because the bolt member 33 is rotatably connected to the grip piece 3a.

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, cross arm A supports three surge arresters Ar. A lightning arrester Ar is arranged adjacent to the pin insulator Pi. Two lightning arresters Ar and Ar are arranged on one end side of the arm A. One lightning arrester Ar is arranged on one end side of the cross arm A. As shown in FIG. The other lightning arrester Ar is arranged near the utility pole P on the one end side of the arm A. At the other end of cross arm A, one lightning arrester Ar is arranged at the end.

Referring to FIG. 1 or FIG. 6, one bird damage prevention device 10 can be reduced in overall length by sliding a pair of movement prevention device main bodies 2, 2 toward a fixed prevention device main body 1. Interference with lightning arresters Ar.Ar can be avoided. The other bird damage prevention device 10 can avoid interference with the lightning arrester Ar arranged at the end portion by sliding the movement prevention device main body 2 toward the fixed prevention device main body 1 .

The bird damage prevention device 10 according to the embodiment can fix the support fitting 3 to the arm A so as not to interfere with the lightning arrester Ar. By sliding the movement preventive device main body 2 with respect to the fixed preventive device main body 1, the bird damage preventive device 10 can be installed on the cross arm without interfering with the lightning arrester Ar.

Further, in the bird damage prevention tool 10 according to the embodiment, even when the lightning arrester Ar is not arranged, the support fitting 3 can be fixed to the cross arm A so as not to interfere with the pin insulator Pi. By sliding the movement preventive device main body 2 with respect to the fixing preventive device main body 1, the bird damage preventive device 10 can be installed on the cross arm 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 main body of the device can be slid to the optimum position to adjust the overall length.
(3) It can be easily attached to the arm supporting the lightning arrester.

1 fixation prevention device main body 1b first substrate 1p needle body 2 movement prevention device main body 2b second substrate 2p needle body 3 support metal fittings 3a and 3b a set of gripping pieces 3c connecting piece 5 insulation operation rod 10 bird damage prevention device (bracket bird damage prevention tool)
31 support part 32 grip part A cross arm Ar pin insulator Pi lightning arrester

Claims (3)

A pin-shaped cross arm bird damage prevention device that can be installed on a cross arm that supports a plurality of pin insulators and a lightning arrester adjacent to the pin insulators,
a first substrate in the form of a strip plate, and a main body of a fixation preventive device composed of a plurality of needle bodies with sharp tips extending from the first substrate in the longitudinal direction;
a second substrate in the form of a band having substantially the same length and width as the first substrate; a pair of movement prevention tool bodies slidably connected to the first substrate along the longitudinal direction of the
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 support bracket is
a support part erected from one of the gripping pieces and supporting the first substrate from its bottom side;
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 first substrate has dovetail rails protruding from both sides thereof,
2. The bird damage prevention device for cross arm according to claim 1, wherein said second substrate has a dovetail groove on one side surface thereof to be fitted with said dovetail groove rail. 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 that is cut out from the tip edge and allows 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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