JP2020137484A - Bird injury preventing tool - Google Patents

Abstract

To provide a bird injury preventing tool capable of easily passing between a pair of edge lines.SOLUTION: A bird injury preventing tool 10 comprises a preventing tool body 1 and a bracket attaching tool 2. The preventing tool body 1 has a main shaft member 11 and a plurality of bendable branch rods 12. The plurality of branch rods 12 are arranged in multiple stages in an axial direction of the main shaft member 11, and radially project in a state that the tip side is downward inclined from the outer periphery of the main shaft member 11. The bracket attaching tool 2 introduces a bracket A from the tip sides of a pair of holding pieces 2t, 2u into the inside and holds. The bracket attaching tool 2 opens a regulation hole 2h at the tip sides of the pair of holding pieces 2t, 2u. A virtual circumference Cv for connecting the tip edges of the plurality of branch rods 12 can be reduced in diameter while the plurality of branch rods 12 pass the regulation hole 2h, and the virtual circumference Cv for connecting the tip edges of the plurality of branch rods 12 can be expanded in diameter after the plurality of branch rods 12 pass the regulation hole 2h.SELECTED DRAWING: Figure 1

Description

The present invention relates to a bird damage prevention device. In particular, it relates to the structure of a bird damage prevention device that prevents birds such as crows and pigeons from nesting on utility poles.

When birds such as crows nest in equipment installed on utility poles, there is a concern that this nest will cause a power outage. For example, when birds carry a wire or the like to a utility pole facility to build a nest, there is a concern that the wire may come into contact with an electric wire and cause a short circuit.

In order to prevent such bird damage, there is known a bird damage prevention device that prevents birds from flying and nesting by attaching an umbrella-shaped framed nesting device to an arm metal installed on a utility pole.

Umbrella-shaped bird damage prevention equipment according to the prior art has a spindle member arranged vertically and a plurality of branches in which the base end is fixed to the outer circumference of the spindle member and extends radially around the spindle member. It consists of a stick. On the other hand, the space on the utility pole where birds can nest differs depending on the mounting condition of the arm and the presence / absence of a switch or a transformer. For this reason, there is a concern that the bird damage prevention device according to the prior art cannot effectively prevent bird damage because a space where nesting is possible remains depending on the pole mounting condition of the utility pole.

Since the bird damage prevention device by the conventional technology has such a defect, it is possible to freely extend the branch rod in the required space in response to the situation of the utility pole, and to ensure the arrival and nesting of birds. A bird damage prevention device that can be prevented is disclosed (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2005-110571

FIG. 10 is a perspective view showing a pillar-mounted state of the bird damage prevention device according to the prior art. Note that FIG. 10 of the present application corresponds to FIG. 9 of Patent Document 1.

Referring to FIG. 10, the utility pole P has a set of arms A and A fixed to the upper portion thereof in a horizontal state. The strap St is fixed to the arm A via the pin insulator Pi. A set of strain insulators Si and Si are arranged on both sides of a set of arms A and A. A set of strain insulators Si and Si are swingably connected to each other. On the other hand, the strain insulator Si is connected to the arm A via the strap St. The other strain insulator Si is oscillatingly connected to the retention clamp Ci.

Referring to FIG. 10, the retention clamp Ci is covered with an insulating cover. The retention clamp Ci sandwiches an overhead distribution line (hereinafter referred to as an electric wire) W inside the retaining clamp Ci. In the retaining pole shown in FIG. 10, a strain insulator Si connected to a retaining clamp Ci that sandwiches the electric wire W is attached to an arm A that supports the electric pole P, and the electric wire W is supported by the electric pole P. An electric wire W is erected between the pair of retaining clamps Ci and Ci without requiring tension. The portion of the electric wire W that bypasses the utility pole P is called, for example, the edge line We. Although the edge line We is not shown in Patent Document 1, in most cases, the edge line We is arranged.

With reference to FIG. 10, the bird damage prevention tool 9 is in a state where the main shaft member 91 is arranged in a vertical state, a plurality of branch members 92 are connected in the axial direction of the main shaft member 91, and the branch member 92 is inclined downward. A branch rod 93 whose base end is fixed to the branch member 92 is provided.

With reference to FIG. 10, the bird damage prevention tool 9 is fixed to the arm A via the arm mounting bracket Br. The spindle member 91 can be arranged in a vertical state by inserting the lower end portion of the spindle member 91 into the tubular portion provided on the tip end side of the arm metal mounting bracket Br. Further, by arranging the plurality of branch rods 93 in a radial pattern, it is possible to prevent birds from flying and nesting. Since the branch rod 93 is supported in a state of being inclined downward, even if a wire for nesting is carried in, the branch rod 93 falls along the inclination, which makes nesting difficult.

With reference to FIG. 10, the bird damage prevention tool 9 according to Patent Document 1 can easily cut the branch rod 93 to an appropriate length by using a cutter, so that the branch rod 93 does not come into contact with a switch, a transformer, or the like. In addition, a plurality of branch rods 93 can be freely extended in a space on the utility pole P where there is a risk of nesting.

The bird damage prevention device 9 according to Patent Document 1 is fixed to the arm metal mounting bracket Br by lowering the bird damage prevention device 9 from above the arm metal A, but the bird damage prevention device 9 is fixed from below the arm metal A. Workability is better to lift. This also applies to existing nest protection devices that are framed like an umbrella.

However, when the bird damage prevention device is lifted from below the arm, it is necessary to pass between a set of edge lines We and We, and multiple branch rods that spread radially get in the way, and a set of edge lines. There is a problem that it is difficult to pass between We and We.

If you try to force a bird damage prevention device to pass between a set of edge lines We and We, you need to cover the edge line We with protective equipment such as an insulating sheet in advance, which causes a problem of increasing the work process. is there. There is a need for bird damage prevention equipment that can easily pass between a set of edges. The above can be said to be the subject of the present invention.

The present invention has been made in view of such a problem, and can easily pass between a set of edge lines, and after passing between a set of edge lines, birds nest on utility poles. The purpose is to provide bird damage prevention equipment to prevent this.

The present inventor has a spindle member that extends straight, a preventive tool main body that is arranged in multiple stages in the axial direction of the spindle member, and has a plurality of flexible branch rods that protrude radially from the outer circumference of the spindle member, and a spindle member. A metal fitting that has a regulating hole that opens freely from the tip on the tip side of a pair of holding pieces to form a bird damage prevention device, and allows the bird damage prevention device to pass between a set of edge lines. When, multiple branch rods are passed through the regulation hole to reduce the diameter of the virtual circumference connecting the tip edges of the multiple branch rods, and after the multiple branch rods pass through the regulation hole, the multiple branch rods It was thought that the bird damage prevention device could be installed on the arm by expanding the diameter of the virtual circumference connecting the tip edges, and based on this, the following new bird damage prevention device was invented.

(1) The bird damage prevention tool according to the present invention is arranged in multiple stages with a spindle member extending straight and a certain interval in the axial direction of the spindle member, and the tip end side is inclined downward from the outer circumference of the spindle member. It has a preventive device main body having a plurality of flexible branch rods protruding radially in a state, a pair of holding pieces arranged substantially in parallel, and a connecting piece connecting the base ends of the pair of holding pieces. A pair of arm metal attachments for introducing and holding the arm metal from the tip end side of the holding piece, and the arm metal attachment tool includes the base end side of the plurality of branch rods. A regulation hole in which the spindle member is freely opened from the tip portion is provided on the tip end side of the pair of holding pieces, and while the plurality of branch rods pass through the regulation hole, the tip edges of the plurality of branch rods are held. The diameter of the virtual circumference to be connected is reduced, and after the plurality of branch rods have passed through the regulation hole, the diameter of the virtual circumference connecting the tip edges of the plurality of branch rods is expanded.

(2) The preventive tool main body is arranged on the base end side of the spindle member, and after passing through the regulation hole opened in the holding piece on the upper side, the diameter of the virtual circumference is expanded to increase the diameter of the spindle member. A plurality of reverse stop rods that prevent the return are detachably fixed to the base end side of the spindle member, and the arm metal is attached in an upright state in cooperation with the plurality of reverse stop rods. It is preferable to further include a fastener to be held by the tool.

(3) It is preferable that the arm fitting is arranged so as to be inclined inward from the outer surface of the holding piece, and the holding piece is provided with one or more lances for preventing the holding piece from falling off. ..

(4) The arm metal fitting further has a grip portion that can be gripped by an insulating operation rod for indirect live-line work, and the grip portion can rotate the base end edge to the bottom portion of the holding piece on the lower side. It is preferably composed of a movable grip plate connected to.

(5) The movable grip plate can introduce the base end portion of the spindle member, and opens a long hole in the center portion for preventing the nut member screwed into the base end portion of the spindle member from falling off. It is preferable to do so.

The bird damage prevention tool according to the present invention is arranged in multiple stages in the axial direction of the spindle member extending straight, and has a prevention tool main body having a plurality of flexible branch rods radially protruding from the outer circumference of the spindle member, and the spindle member at the tip. It is equipped with an arm fitting that has a regulation hole that is freely open from the part on the tip side of the pair of holding pieces, and when passing the bird damage prevention device between a set of edge lines, a plurality of branches Pass the rod through the regulation hole to reduce the diameter of the virtual circumference connecting the tip edges of multiple branch rods, and after multiple branch rods pass through the regulation hole, the virtual connection of the tip edges of multiple branch rods By expanding the circumference, the bird damage prevention device can be easily installed on the arm.

It is a perspective view which shows the structure of the bird damage prevention tool by one Embodiment of this invention. It is an enlarged perspective view of the prevention tool main body provided in the bird damage prevention tool by the said embodiment. It is a figure which shows the structure of the arm metal fitting provided with the bird damage prevention tool by the said embodiment, FIG. 3 (A) is the right side view of the arm metal attachment, and FIG. 3 (B) is FIG. 3 (A). 3 (C) is a rear view of FIG. 3 (A), and FIG. 3 (D) is a bottom view of FIG. 3 (A). It is a right side view which shows the structure of the bird damage prevention tool by the said embodiment, and is the state figure which put the bird damage prevention tool on the arm. It is a figure which shows the use state of the arm metal attachment provided with the bird damage prevention tool by the said embodiment, and is the state diagram before the arm metal attachment is attached to the arm metal. It is a figure which shows the use state of the arm metal attachment provided with the bird damage prevention tool by the said embodiment, and is the state figure which attached the arm metal attachment to the end portion of the arm metal. It is a figure which shows the use state of the bird damage prevention tool by the said embodiment, and is the state figure before inserting the prevention tool main body into the regulation hole from the lower part of the arm metal attachment. It is a front view which shows the structure of the insulation operation rod for operating the bird damage prevention tool by this invention. It is an enlarged front view of the main part of FIG. It is a perspective view which shows the pillar state of the bird damage prevention tool by the prior art.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

Before explaining the configuration of the bird damage prevention tool for the arm according to the present invention, the configuration of the insulating operation rod for operating the bird damage prevention tool according to the present invention will be described.

(Structure of insulation operating rod)
With reference to FIG. 8 or 9, the insulating operation rod 5 is composed of a long operation rod 51 and a tool portion 52. Further, the insulating operation rod 5 includes an operating rod 53. The tool portion 52 is attached to the tip end portion of the operation rod 51.

With reference to FIG. 8 or 9, the tool portion 52 is composed of a pair of curved gripping arms 5a and 5b that open and close. Then, one gripping arm 5a is a fixed arm having a fixed base end portion, and the other gripping arm 5b rotates about a rotation shaft 5c provided at the base end portion of one gripping arm 5a. It is a movable arm.

Referring to FIG. 8, the operating rod 53 is held along the operating rod 51. The tip of the operating rod 53 is rotatably connected to the other gripping arm 5b. Then, by operating the operation lever 54 provided at the base end portion of the operating rod 53, the other gripping arm 5b can be opened and closed with respect to one gripping arm 5a. The insulating operating rod 5 is made of a plastic pipe or the like in which the intermediate portion between the operating rod 51 and the operating rod 53 has an insulating property, and the insulating property is ensured so as to be suitable for the indirect live wire construction method.

With reference to FIG. 8, when the operation lever 54 is grasped and the operation lever 54 is brought close to the operation rod 51, the other gripping arm 5b can be closed with respect to one gripping arm 5a. When the operating lever 54 is released, the force of the spring (not shown) connected to the operating lever 54 can open the other gripping arm 5b with respect to one gripping arm 5a. FIG. 8 or 9 shows a state in which the other gripping arm 5b is opened to the maximum with respect to one gripping arm 5a.

With reference to FIG. 8 or 9, one gripping arm 5a projects a tapered gripping claw 51a. The gripping claw 51a forms a gripping surface 50a. The gripping surface 50a is formed substantially parallel to the rotation center of the rotation shaft 5c along the centrifugal direction. Similarly, the other gripping arm 5b projects a tapered gripping claw 51b. The gripping claw 51b forms a gripping surface 50b. The gripping surface 50b is arranged so as to have a predetermined opening angle with the gripping surface 50a. By gripping the operating lever 54 with reference to FIG. 8 or 9, the gripping surface 50b can be brought closer to the gripping surface 50a.

The insulating operation rod 5 shown in FIG. 8 or 9 is a so-called “insulated yatko” capable of gripping a high-voltage distribution line or the like arranged at a high place with a pair of gripping claws 51a and 51b.

[Structure of bird damage prevention equipment]
(overall structure)
Next, the configuration of the bird damage prevention device according to the embodiment of the present invention will be described. With reference to FIGS. 1 to 4, the bird damage prevention device 10 according to the embodiment of the present invention can be attached to the arm A. The arm A is mounted on the utility pole P in a substantially horizontal state (see FIG. 10).

Referring to FIGS. 1 to 4, the bird damage preventive device 10 includes a preventive device main body 1 and an arm bracket attachment 2. The preventive tool main body 1 includes a spindle member 11 that extends straight and a plurality of flexible branch rods 12.

With reference to FIG. 1 or FIGS. 2 and 4, the plurality of branch rods 12 are provided in multiple stages in the axial direction of the spindle member 11 from the tip end side to the base end portion side of the spindle member 11. It is placed in. These branch rods 12 project radially from the outer circumference of the spindle member 11. Further, these branch rods 12 project from the outer periphery of the spindle member 11 in a state where the tip end side is inclined downward.

With reference to FIG. 1 or FIGS. 3 and 4, the arm attachment 2 has a pair of holding pieces 2t and 2u and a connecting piece 2c. The pair of holding pieces 2t and 2u are arranged substantially in parallel. The connecting piece 2c connects the base ends of the pair of holding pieces 2t and 2u. The arm metal attachment 2 can hold the arm metal A by introducing the arm metal A from the tip side of the pair of holding pieces 2t / 2u.

Referring to FIG. 1 or FIGS. 3 and 4, the arm fitting 2 has a regulation hole 2h opened on the tip end side of the pair of holding pieces 2t and 2u (see FIG. 3). A spindle member 11 including the base end side of a plurality of branch rods 12 can be introduced into these regulation holes 2h from the tip end portion (see FIG. 7).

With reference to FIG. 7, while the plurality of branch rods 12 pass through the regulation hole 2h, the diameter of the virtual circumferential Cv connecting the tip edges of the plurality of branch rods 12 can be reduced. With reference to FIG. 1 or FIG. 4, after the plurality of branch rods 12 have passed through the regulation hole 2h (see FIG. 7), the diameter of the virtual circumferential Cv connecting the tip edges of the plurality of branch rods 12 can be expanded.

In the bird damage prevention device 10 according to the embodiment, when the bird damage prevention device 10 is passed between a set of edge lines We and We (see FIG. 10), a plurality of branch rods 12 are passed through the regulation hole 2h. , The virtual circumference Cv connecting the tip edges of the plurality of branch bars 12 is reduced in diameter, and after the plurality of branch bars 12 pass through the regulation hole 2h, the virtual circumference Cv connecting the tip edges of the plurality of branch bars 12 is connected. By increasing the diameter, the bird damage prevention tool 10 can be easily installed on the arm A.

(Structure of preventive device body)
Next, the configuration of the preventive device main body 1 according to the embodiment will be described. Referring to FIG. 1 or FIGS. 2 and 4, the preventive tool body 1 further includes a hemispherical cap member 13, a plurality of bendable check rods 14, and a nut member 15 which is a fastener.

(Structure of cap member)
With reference to FIG. 1 or FIGS. 2 and 4, the cap member 13 can be detachably fixed to the tip surface of the spindle member 11. Referring to FIG. 2, the cap member 13 has a male screw portion 13 m protruding from the bottom portion. On the other hand, referring to FIG. 2, the spindle member 11 has a female threaded portion 11f screwed with the male threaded portion 13 m screwed on the tip surface.

With reference to FIG. 1 or FIG. 4, the outer diameter of the cap member 13 is formed to be slightly larger than the outer diameter of the spindle member 11 including the base end side of the plurality of branch rods 12. By fixing the cap member 13 to the tip of the spindle member 11, the spindle member 11 can be easily introduced from the tip (see FIG. 7).

(Structure of spindle member)
With reference to FIG. 1 or FIGS. 2 and 4, the spindle member 11 is preferably made of an insulating synthetic resin. A cylindrical spindle member 11 can be obtained by molding a synthetic resin having an insulating property.

Referring to FIG. 2, the spindle member 11 forms eight grooves 11d formed in an arc shape from the outer circumference. These grooves 11d extend from the tip edge of the spindle member 11 to the proximal end side and are bored. The base end portion of the branch rod 12 is fixed to these grooves 11d by using a joining means such as adhesion.

(Structure of branch bar)
With reference to FIG. 1 or FIGS. 2 and 4, the branch bar 12 is preferably made of an insulating synthetic resin. A bent branch bar 12 can be obtained by molding a synthetic resin having an insulating property.

Referring to FIG. 1 or FIGS. 2 and 4, the plurality of branch rods 12 have their tips extending in a cross shape. In the embodiment, the plurality of branch rods 12 are arranged in three stages in the axial direction of the spindle member 11. In a plan view, the plurality of branch bars 12 are displaced by approximately 45 degrees from the plurality of branch bars 12 in the upper row and the plurality of branch bars 12 in the middle row. The plurality of branch bars 12 in the middle row and the plurality of branch bars 12 in the lower row are arranged in the same manner in a plan view. That is, the plurality of branch bars 12 are arranged in a state of being divided into eight equal parts in a plan view.

(Structure of reverse stop bar)
With reference to FIG. 1 or FIGS. 2 and 4, the plurality of reverse stop rods 14 are fixed to the spindle member 11 with their proximal end sides fitted in the groove 11d. The plurality of reverse stop rods 14 project radially from the outer circumference of the spindle member 11. Further, these reverse stop rods 14 project from the outer periphery of the spindle member 11 in a state where the tip end side is inclined downward.

With reference to FIG. 7, the spindle member 11 is introduced into the regulation hole 2h from the tip thereof, and after the plurality of reverse stop rods 14 have passed through the regulation hole 2h, the plurality of reverse stop rods 14 are elastically restored to a plurality. The diameter of the virtual circumference connecting the tip edges of the reverse stop rod 14 can be increased. Then, the plurality of reverse stop rods 14 can abut on the peripheral edge of the regulation hole 2h to prevent the spindle member 11 from returning (see FIG. 1 or FIG. 4).

(Structure of nut member)
With reference to FIG. 2 or FIG. 4, the nut member 15 can be detachably fixed to the proximal end side of the spindle member 11. The spindle member 11 has a male screw portion 11 m formed on the proximal end side. The nut member 15 is fastened to the male screw portion 11 m so that the nut member 15 can be stopped at a predetermined position of the spindle member 11.

When the spindle member 11 is introduced into the regulation hole 2h from the tip end portion thereof with reference to FIG. 7, the nut member 15 can come into contact with the holding piece 2u on the lower side from the bottom surface side. Then, the nut member 15 can be held by the arm fitting 2 in an upright state in cooperation with the plurality of reverse stopper rods 14 (see FIG. 1 or FIG. 4).

(Structure of arm attachment)
Next, the configuration of the arm fitting 2 according to the embodiment will be described. Referring to FIG. 1 or FIGS. 3 and 4, the arm attachment 2 includes a pair of lances 2r and 2r on a pair of holding pieces 2t and 2u.

(Lance composition)
Referring to FIG. 3, one of the lances 2r and 2r is arranged so as to be inclined from the outer surface of the holding piece 2t on the upper side to the inside of the arm fitting 2. The other lances 2r and 2r are arranged in an inclined state from the outer surface of the holding piece 2u on the lower side to the inside of the arm fitting 2.

With reference to FIGS. 5 to 6, when the arm A is relatively introduced into the arm fitting 2 from the opening side of the arm fitting 2, the pair of lances 2r and 2r facing each other are expanded to each other. Can be done. Then, when the arm metal A is in contact with the inner wall of the connecting piece 2c, the one-to-one pair of lances 2r and 2r elastically recovers, and the tip edge of the one-to-one pair of lances 2r and 2r can face the arm metal A. .. As a result, the one-to-one pair of lances 2r and 2r can be prevented from falling off from the arm A.

(Structure of grip part)
Referring to FIG. 1 or FIGS. 3 and 4, the arm attachment 2 has a grip portion 21 protruding from the bottom of the lower holding piece 2u. The grip portion 21 can be gripped by a pair of gripping arms 5a and 5b provided on the tool portion 52 of the insulating operation rod 5 for indirect live-line work (see FIGS. 8 or 9). The grip portion 21 is composed of a movable grip plate in which the base end edge is rotatably connected to the holding piece 2u on the lower side by a hinge 21h.

Referring to FIG. 3C, the grip portion 21 has an elongated hole 211 opened in the central portion. When the grip portion 21 is rotated clockwise with reference to FIG. 4, the male screw portion 11 m of the spindle member 11 can be introduced into the elongated hole 211 from the tip portion (see FIG. 1). The hinge 21h is tightened so that the posture of the grip portion 21 can be maintained.

With reference to FIG. 1 or FIGS. 3 and 4, the grip portion 21 has an elongated hole 211 that can be engaged with the male screw portion 11 m of the spindle member 11, and thus has an existing nut fall-off prevention cap (not shown). Can be prevented from falling off of the nut member 15 without using.

[Action of bird damage prevention equipment]
Next, the action and effect of the bird damage prevention tool 10 will be described while explaining the operation procedure of the bird damage prevention tool 10 according to the embodiment.

First, with reference to FIG. 5, the grip portion 21 is gripped by a pair of gripping arms 5a and 5b (see FIG. 8 or 9), and the opening side of the arm fitting 2 and one side surface of the arm A are held. Place them facing each other. Next, with the grip portion 21 gripped by the pair of gripping arms 5a and 5b, the arm metal attachment 2 is moved toward the arm metal A. In the state shown in FIG. 6, the arm metal A is relatively introduced on the opening side of the arm metal fitting 2.

Next, from the state shown in FIG. 6, by moving the arm metal attachment 2 to the left side with respect to the arm metal A, the arm metal A can be relatively moved to the inner part of the arm metal attachment 2 ( (See FIG. 7). In the state shown in FIG. 7, a pair of lances 2r and 2r prevent the lances 2r and 2r from falling off from the arm A.

Next, with reference to FIG. 7, the base end portion of the spindle member 11 is gripped by a pair of gripping arms 5a and 5b (see FIG. 8 or FIG. 9), and the spindle shaft including the proximal end portion side of the plurality of branch rods 12 The member 11 is introduced into the regulation hole 2h from the tip end portion. In this case, it is preferable to use a pair of gripping arms 5a and 5b (see FIG. 8 or 9) to rotate the gripping portion 21 counterclockwise and retract it (see FIG. 7).

Next, referring to FIG. 1 or FIG. 4, a plurality of check rods 14 abut on the peripheral edge of the regulation hole 2h to prevent the spindle member 11 from returning, and the nut member 15 is on the bottom surface side of the holding piece 2u. The spindle member 11 can be held by the arm fitting 2 in an upright state in cooperation with the plurality of reverse stopper rods 14 (see FIG. 1 or FIG. 4).

Next, referring to FIG. 4, the grip portion 21 is rotated clockwise by using the pair of gripping arms 5a and 5b (see FIG. 8 or 9), so that the male screw portion 11 m of the spindle member 11 is formed. By engaging the elongated hole 211 (see FIG. 1), the nut member 15 can be prevented from falling off. Then, a series of operation procedures is completed.

In the bird damage prevention device 10 according to the embodiment, when the bird damage prevention device 10 is passed between a set of edge lines We and We (see FIG. 10), a plurality of branch rods 12 are passed through the regulation hole 2h. , The virtual circumference Cv connecting the tip edges of the plurality of branch bars 12 is reduced in diameter, and after the plurality of branch bars 12 pass through the regulation hole 2h, the virtual circumference Cv connecting the tip edges of the plurality of branch bars 12 is connected. By increasing the diameter, the bird damage prevention tool 10 can be easily installed on the arm A.

The bird damage prevention device 10 according to the embodiment includes a plurality of reverse stop rods 14 that prevent the spindle member 11 from returning by expanding the diameter of the virtual circumference after passing through the regulation hole 2h opened in the holding pieces 2t and 2u. Since the nut member 15 that comes into contact with the holding piece 2u in cooperation with the plurality of check rods 14, the spindle member 11 can be easily held by the arm fitting 2 in an upright state.

The arm fitting 2 according to the embodiment is arranged so as to be inclined inward from the outer surface of the holding piece 2t / 2u, and the holding piece 2t / 2u is provided with a plurality of lances 2r for preventing the holding piece 2t / 2u from falling off. Therefore, it is possible to prevent the arm from falling out of the arm A.

Since the grip portion 21 according to the embodiment protrudes from the lower part of the arm fitting 2, there is an effect that it is easy to approach from below with the insulating operation rod 5.

Further, since the grip portion 21 has an elongated hole 211 that can be engaged with the male screw portion 11 m of the spindle member 11, the nut member 15 falls off without using an existing nut fall-off prevention cap (not shown). Can be prevented.

The bird damage prevention device according to the present invention can be expected to have the following effects.
(1) An umbrella-shaped bird damage prevention device can be easily attached to the arm by using an insulating operation rod for indirect live-line construction.
(2) The work location when installing the bird damage preventer does not go higher than the high-voltage line.
(3) The working position of the aerial work platform in the bucket can be lowered.
(4) There is no need for the operator to carelessly touch the high-voltage line and get an electric shock.

1 Preventive tool body 2 Arm metal fittings 2c Connecting piece 2h Control hole 2t / 2u Pair of holding pieces 10 Bird damage prevention device 11 Main shaft member 12 Multiple branch rods A Arm metal Cv Virtual circumference

Claims (5)

A spindle member that extends straight, and a plurality of flexible branches that are arranged in multiple stages at regular intervals in the axial direction of the spindle member and project radially from the outer circumference of the spindle member with the tip side inclined downward. The body of the preventive device with a stick and
It has a pair of holding pieces arranged substantially in parallel and a connecting piece in which the base ends of the pair of holding pieces are connected to each other, and an arm metal is introduced and held inside from the tip end side of the pair of holding pieces. Equipped with arm fittings to
The arm fitting has a regulating hole on the tip end side of the pair of holding pieces, which is open so that the spindle member including the base end end side of the plurality of branch rods can be introduced from the tip end portion.
While the plurality of branch rods are passing through the regulation hole, the diameter of the virtual circumference connecting the tip edges of the plurality of branch rods is reduced.
A bird damage prevention device that expands the diameter of a virtual circumference connecting the tip edges of the plurality of branch rods after the plurality of the branch rods have passed through the regulation holes. The preventive device body
A plurality of reverse stop rods arranged on the base end side of the spindle member and after passing through the regulation hole opened in the holding piece on the upper side, the virtual circumference is enlarged to prevent the spindle member from returning. When,
Further provided with a fastener that is detachably fixed to the base end side of the spindle member and that holds the spindle member in an upright state on the arm fitting in cooperation with the plurality of reverse stopper rods. The bird damage prevention device according to claim 1. Claim 1 or 2 in which the arm fitting is arranged so as to be inclined inward from the outer surface of the holding piece, and the holding piece is provided with one or more lances for preventing the holding piece from falling off. The listed bird damage prevention device. The arm fitting further has a grip portion that can be gripped by an insulating operation rod for indirect live-line work.
The bird damage prevention tool according to any one of claims 1 to 3, wherein the grip portion comprises a movable grip plate whose base end edge is rotatably connected to the bottom portion of the holding piece on the lower side. The movable grip plate can introduce the base end portion of the spindle member, and has an elongated hole in the central portion for preventing the nut member screwed into the base end portion of the spindle member from falling off. , The bird damage prevention device according to claim 4.

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