JP2020115750A - Bird damage prevention tool - Google Patents

Abstract

To provide a bird damage prevention tool capable of easily passing a space between one set of edge lines.SOLUTION: A bird damage prevention tool 10 comprises: a tubular member 11 extending in a straight manner; a plurality of branched members 12, 13, 14 which are provided in a multi-step in an axial direction of the tubular member 11, and protrude radially from a periphery of the tubular member 11; a main shaft member 15 which is arranged inside of the tubular member 11 so as to be inserted thereinto; and a plurality of branch rods 16 whose base end parts are fixed to a periphery of the main shaft member 15, and whose tip end parts can protrude so as to freely advance and retreat in a state of being inclined downward in a peripheral direction from tip end edges of the branched members 12, 13, 14. In a state in which the main shaft member 15 with the plurality of branch rods 16 is moved toward the base end part side of the tubular member 11, a virtual circle connecting tip end edges of the plurality of branch rods 16 are increased in a diameter, and in a state in which the main shaft member 15 with the plurality of branch rods 16 is moved toward the tip end part side of the tubular member 11, the virtual circle connecting tip end edges of the plurality of branch rods 16 can be reduced in a diameter.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 tool for preventing birds such as crows and pigeons from nesting on utility poles.

If a bird such as a crow nests in a facility installed on a power pole, there is a concern that this nest may cause a power failure. For example, when a bird carries a wire or the like to a utility pole facility for nesting, 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 for preventing birds from flying and nesting by attaching an umbrella-shaped nest protection device to a armrest installed on an electric pole.

An umbrella-shaped bird damage prevention device according to the related art has a main shaft member arranged in a vertical state and a plurality of branches having a base end portion fixed to the outer periphery of the main shaft member and radially extending around the main shaft member in a downwardly inclined state. Composed of sticks and. On the other hand, the space on the telephone pole where birds can nest differs depending on the attachment status of arms and the presence of switches or transformers. For this reason, the bird damage prevention device according to the related art has a concern that it may not be possible to effectively prevent bird damage due to a space in which nesting is possible depending on the state of the utility pole.

Since the bird damage prevention device according to the conventional technology has such a problem, it is possible to freely install branch rods in a necessary space in order to cope with the situation of the pole of the electric pole, and to ensure the arrival and nesting of birds. A bird damage prevention device capable of preventing the damage has been disclosed (for example, refer to Patent Document 1).

JP, 2005-110571, A

FIG. 8: is a perspective view which shows the column state of the bird damage prevention tool by a prior art. Note that FIG. 8 of the present application corresponds to FIG. 9 of Patent Document 1.

Referring to FIG. 8, the utility pole P has a set of arms A and A fixed horizontally on the upper portion thereof. The strap St is fixed to the armrest A via the pin insulator Pi. A pair of tension insulators Si and Si are arranged on both sides of the pair of arms A and A. The pair of tension insulators Si and Si are swingably connected to each other. One of the tensile insulators Si is connected to the armrest A via the strap St. The other tension-resistant insulator Si is connected to the tension clamp Ci in a swingable manner.

Referring to FIG. 8, the detention clamp Ci is covered with an insulating cover. The detention clamp Ci holds an overhead distribution line (hereinafter referred to as an electric wire) W therein. In the retaining column shown in FIG. 8, the tension insulator Si connected to the retention clamp Ci that holds the electric wire W is attached to the armature A supported on the electric pole P to support the electric wire W on the electric pole P. An electric wire W is installed between the pair of detention clamps Ci, Ci without requiring tension. The portion of the electric wire W that bypasses the utility pole P is called, for example, an edge line We. Note that although the edge line We is not shown in Patent Document 1, in most cases, the edge line We is provided.

Referring to FIG. 8, the bird damage prevention device 9 has a main shaft member 91 arranged in a vertical state, a plurality of branch members 92 connected in the axial direction of the main shaft member 91, and a state in which the branch member 92 is inclined downward. The base end portion is provided with the branch rod 93 fixed to the branch member 92.

Referring to FIG. 8, the bird damage preventive tool 9 is fixed to the arm member A via a arm member mounting bracket Br. By inserting the lower end portion of the main shaft member 91 into the tubular portion provided on the tip end side of the arm attachment fitting Br, the main shaft member 91 can be arranged vertically. Further, by arranging the plurality of branch rods 93 radially, it is possible to prevent birds from flying and nesting. Since the branch bar 93 is supported in a downwardly inclined state, even if a wire or the like for nest formation is carried in, the branch bar 93 falls along the inclination, which makes nesting difficult.

With reference to FIG. 8, the bird damage prevention device 9 according to Patent Document 1 can easily cut the branch rod 93 into an appropriate length by using a cutter, so that it does not come into contact with a switch or a transformer. Moreover, a plurality of branch rods 93 can be freely extended in the space on the electric pole P where nesting may occur.

The bird damage prevention tool 9 according to Patent Document 1 is fixed to the armrest mounting bracket Br by lowering the bird damage prevention tool 9 from above the armband A. Is better to lift. This is also the case with the existing nest protection that is framed like an umbrella.

However, if the bird damage prevention tool is lifted from below the arm, it is necessary to pass between the pair of edge lines We, We, and a plurality of branch rods that are radially spread out as an obstacle, and a pair of edge lines There is a problem that it is difficult to pass between We and We.

If you try to force the bird damage prevention tool to pass through between the pair of edge lines We and We, it is necessary to cover the edge line We with an insulating sheet or other protective device in advance, which increases the number of work steps. is there. There is a need for a bird damage control device that can easily pass between a pair of edge lines. The above is the subject of the present invention.

The present invention has been made in view of such a problem, and can easily pass between a pair of edge lines, and after passing between a pair of edge lines, birds nest on a utility pole. It aims at providing the bird damage prevention tool which prevents that.

The present inventor has a straightly extending tubular member, a plurality of branch members arranged in multiple stages in the axial direction of the tubular member, radially projecting from the outer periphery of the tubular member, a main shaft member arranged so as to be insertable inside the tubular member, and , A plurality of branch rods that are fixed to the outer circumference of the main shaft member and that can be moved forward and backward with the tip end side inclined downward from the tip edge of the branch member in the outer circumferential direction constitute a bird damage prevention device. When passing the bird damage prevention equipment between the edge lines of the set, reduce the diameter of the virtual circumference connecting the tip edges of the plurality of branch rods. It is considered that the above problems can be solved by enlarging the imaginary circumference that connects the tip edges of the branch rods, and based on this, the inventors have invented the following new bird damage prevention tool.

(1) The bird damage preventing device according to the present invention has a tubular member that is open at both ends and extends straight, and a constant axial direction of the tubular member from the distal end side to the proximal end side of the tubular member. A plurality of branch members that are arranged in multiple stages at intervals, and that radially project from the outer periphery of the tubular member, and that open out a lead-out hole whose axial center intersects with the axial center of the tubular member in an inclined state; A main shaft member that is arranged to be insertable inside the tubular member and a base end portion are fixed to the outer circumference of the main shaft member, and the tip end side is guided to the lead-out hole and inclined downward from the tip end edge of the branch member in the outer peripheral direction. In the state where the main shaft member is moved toward the base end side of the tubular member, the plurality of branch rods of the plurality of the branch rods are provided, the branch rods having the same number as the flexible branch member capable of projecting forward and backward in the state. The diameter of an imaginary circle connecting the tip edges is expanded, and when the main shaft member is moved toward the tip end side of the tubular member, the diameter of the imaginary circumference connecting the tip edges of the plurality of branch bars is reduced. ..

(2) The bird damage prevention device according to the present invention has a support portion on one end side that supports the other end of the tubular member in a state where the tubular member is erected, and has a holding portion that is detachable from the armor. It is preferable to further include a metal fitting for mounting the arm on the other end side.

(3) With respect to the tubular member, a lock mechanism that can stop the main shaft member at a predetermined position in the axial direction is further provided, and the lock mechanism is continuous in the axial direction of the main shaft member and has a plurality of wavy folds. A bellows shaft portion that is continuously provided on the outer periphery and is disposed inside the tubular member, and can be rotatably abutted on a fold of the bellows shaft portion, and the bellows shaft portion is provided in a recess portion between the folds and the folds. It is preferable to include a sphere that applies a force from the outer peripheral direction toward the center.

(4) It is preferable that the main shaft member has a grip at a base end portion that can be operated by an insulating operation rod having a pair of gripping arms that open and close at the tip end portion.

The bird damage prevention device according to the present invention is a tubular member extending straight, arranged in multiple stages in the axial direction of the tubular member, a plurality of branch members radially protruding from the outer periphery of the tubular member, and arranged so as to be insertable inside the tubular member. The main shaft member and a plurality of branch rods that fix the base end portion to the outer periphery of the main shaft member and can project forward and backward with the tip end side inclined downward from the tip end edge of the branch member toward the outer peripheral direction. By configuring and moving the main shaft member toward the distal end side of the tubular member, the virtual circumference connecting the distal ends of the plurality of branch rods can be reduced in diameter, and the bird damage prevention device can be provided between the pair of edge lines. By passing the main shaft member toward the base end side of the tubular member, it is possible to increase the diameter of an imaginary circle connecting the tip edges of the plurality of branch rods, which makes nesting of birds difficult.

It is a perspective view showing composition of a bird damage prevention implement by one embodiment of the present invention. It is a front view of the bird damage prevention tool by the embodiment, and is an open umbrella state view of the bird damage prevention tool. It is a front view of the bird damage prevention tool by the embodiment, and is a closed umbrella state view of the bird damage prevention tool. It is a perspective exploded assembly view which expanded the principal part by the side of the base end part of the bird damage prevention implement by the said embodiment. It is a figure which shows the structure of the arm-attachment metal fittings with which the bird damage prevention tool by the said embodiment is equipped, FIG. 5(A) is a front view of arm-attachment metal fittings, FIG. FIG. 5(C) is a right side view of the arm mount fitting, FIG. 5(D) is a left side view of the arm mount, and FIG. 5(E) is a bottom view of the arm mount. .. It is a front view which shows the structure by an example of the insulated operating rod which concerns on this invention. It is the front view which expanded the principal part of FIG. It is a perspective view which shows the mounting state of the bird damage prevention tool by a prior art.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Structure of bird damage prevention equipment]
First, the structure of a bird damage prevention tool according to an embodiment of the present invention will be described. It should be noted that components having the same reference numerals as those used in the prior art have the same operation, and thus the description thereof may be omitted below.

(overall structure)
Next, the overall structure of the bird damage prevention device according to the embodiment of the present invention will be described. Referring to FIGS. 1 to 4, a bird damage prevention device 10 according to an embodiment of the present invention includes a straight tubular member 11 and a plurality of axially arranged tubular members 11 arranged radially from the outer periphery of the tubular member 11. A plurality of projecting branch members 12, 13, 14 are provided. Further, the bird damage prevention tool 10 includes a main shaft member 15 and a plurality of bendable branch bars 16.

Referring to FIGS. 1 to 4, the tubular member 11 is open at both ends. The branch members 12, 13, and 14 are arranged in multiple stages from the distal end side of the tubular member 11 toward the proximal end side thereof at a constant interval in the axial direction of the tubular member 11. These branch members 12, 13, 14 project radially from the outer periphery of the tubular member 11. These branch members 12, 13, 14 open the lead-out holes Hi. The center of the outlet hole Hi intersects the center of the tubular member 11 in an inclined state.

Referring to FIGS. 1 to 4, the main shaft member 15 is disposed inside the tubular member 11 so as to be inserted therein. The plurality of branch rods 16 fix their base end portions to the outer periphery of the main shaft member 15. Further, the tip end side of the branch rod 16 is guided to the lead-out hole Hi, and can be forwardly and backwardly projected in a state of being inclined downward from the tip edges of the branch members 12, 13, 14 in the outer peripheral direction.

With reference to FIG. 1 or FIG. 2, in a state in which the main shaft member 15 moves toward the base end side of the tubular member 11, a virtual circumference Cv connecting the tip edges of the plurality of branch bars 16 is expanded. There is. On the other hand, referring to FIG. 3, when the main shaft member 15 moves toward the tip end side of the tubular member 11, the imaginary circumference Cv connecting the tip edges of the plurality of branch rods 16 is reduced.

Referring to FIG. 1 to FIG. 3, a bird damage prevention device 10 according to an embodiment includes a straightly extending tubular member 11, a plurality of tubular members 11 arranged in multiple stages in the axial direction of the tubular member 11, and a plurality of radial members protruding radially from the outer periphery of the tubular member 11. The branch members 12, 13, 14 and the main shaft member 15 that is freely inserted into the tubular member 11, and the base end portion are fixed to the outer circumference of the main shaft member 15, and the tip end side is the tip end of the branch member 12, 13, 14. It is composed of a plurality of branch rods 16 that can project forward and backward while being inclined downward from the edge toward the outer peripheral direction.

Referring to FIG. 8, when the bird damage preventive tool 10 is passed between the pair of edge lines We, We, the main shaft member 15 is moved toward the distal end side of the tubular member 11 so that the plurality of edge lines We. An imaginary circumference Cv connecting the tip edges of the branch rods 16 can be reduced in diameter (see FIG. 3). Thereby, the bird damage prevention device 10 can be easily passed between the pair of edge lines We, We.

With reference to FIG. 8, after passing the bird damage preventive tool 10 between the pair of edge lines We, We, the main shaft member 15 is moved toward the proximal end side of the tubular member 11 so that a plurality of An imaginary circumference Cv connecting the tip edges of the branch rods 16 can be expanded (see FIG. 1 or FIG. 2). In the state shown in FIG. 1 or 2, since the plurality of branch rods 16 are inclined downward, nesting of birds can be made difficult.

(Structure of tubular member)
Next, the configuration of the tubular member 11 according to the embodiment will be described. Referring to FIGS. 1 to 4, the tubular member 11 includes a disc-shaped collar portion 11f and a tubular extension portion 11t.

(Structure of collar part)
With reference to FIGS. 1 to 4, the collar portion 11 f is joined to the base end edge of the tubular member 11. The tubular member 11 and the collar portion 11f may be integrally formed. The flange portion 11f has an outer diameter larger than that of the tubular member 11. The collar portion 11f internally holds a spherical body 11b that constitutes a lock mechanism 1R described later (see FIG. 2 or FIG. 4). Further, the flange portion 11f holds a bellows shaft portion 15b, which constitutes a lock mechanism 1R, which will be described later, in a central portion so as to be able to move back and forth.

(Structure of extension part)
Referring to FIGS. 1 to 4, the extending portion 11t projects coaxially with the tubular member 11 from the bottom surface of the flange portion 11f. It is preferable that the extending portion 11t has an outer diameter smaller than that of the tubular member 11. The bellows shaft portion 15b is inserted into the extending portion 11t (see FIG. 2 or 4). Further, the extending portion 11t has a male screw portion 111 formed on the outer periphery (see FIG. 2 or 3). A nut 11n can be screwed into the male screw portion 111 (see FIG. 1).

(Structure of branch member)
Next, the configuration of the branch members 12, 13, 14 according to the embodiment will be described. Referring to FIGS. 1 to 4, a bird damage prevention tool 10 includes a plurality of branch members 12 arranged in an upper stage, a plurality of branch members 13 arranged in a middle stage, and a plurality of branch members 14 arranged in a lower stage. ing. Although the branch members 12, 13, 14 are the same, they are distinguished by different reference numerals for convenience of explanation.

With reference to FIGS. 1 to 4, a plurality of branch members 12 have their tips extending in a cross shape. The tip ends of the plurality of branch members 13 extend in a cross shape. However, the plurality of branch members 13 are displaced from the plurality of branch members 12 by approximately 45 degrees in a plan view. The tip ends of the plurality of branch members 14 extend in a cross shape, but are arranged in the same manner as the branch member 12 in a plan view. That is, the plurality of branch members 12, 13, 14 are arranged in an evenly divided state in a plan view.

With reference to FIGS. 1 to 4, since the branch members 12, 13, and 14 have the same shape, the branch member 14 will be described below as a representative. Referring to FIG. 2 or 4, the branch member 14 has a base end portion formed into a truncated cone shape having a cavity inside. Further, the branch member 14 is formed in a cylindrical shape at its tip end side. The outlet hole Hi communicates with the inside of the tubular member 11. The lead-out hole Hi can guide the branch bar 16 so that it can move back and forth.

With reference to FIGS. 1 to 4, the tubular member 11 and the branch member 14 may be configured separately, and the proximal end portion of the branch member 14 may be joined to the outer periphery of the tubular member 11. The tubular member 11 and the branch member 14 can also be integrally molded.

(Structure of main shaft member)
Next, the configuration of the spindle member 15 according to the embodiment will be described. Referring to FIG. 1 to FIG. 3, the main shaft member 15 has a disk-shaped flange portion 15f on its head. The outer diameter of the flange portion 15f is formed to be substantially the same as the outer diameter of the tubular member 11.

With reference to FIG. 2, when the main shaft member 15 is moved toward the proximal end side of the tubular member 11, the flange portion 15 f comes into contact with the distal end edge of the tubular member 11, so that the main shaft member 15 with respect to the tubular member 11. The stop position of can be specified.

Referring to FIG. 4, the main shaft member 15 has eight grooves 15d formed in an arc shape from the outer circumference. These grooves 15d are drilled from the tip end edge of the main shaft member 15 to the base end edge. The base ends of the branch rods 16 are fixed to the grooves 15d by using a joining means such as adhesion. Further, the tip end side of the branch rod 16 can be introduced into these grooves 15d.

Referring to FIG. 2 to FIG. 4, the main shaft member 15 has a bellows shaft portion 15b coaxially protruding from the base end portion. The bellows shaft portion 15b has a plurality of corrugated folds 151 arranged continuously on the outer circumference (see FIG. 4). The bellows shaft portion 15b has a male screw portion 15s protruding from the base end portion (see FIG. 4). A grip 15g is fastened to the male screw portion 15s.

The grip 15g can be gripped by using a pair of gripping arms 5a and 5b provided on the insulating operation rod 5 described later (see FIG. 6 or 7). The main shaft member 15 can be moved toward the base end side of the tubular member 11 by operating an insulation operating rod 5 described later (see FIG. 2), and the main shaft member 15 can be moved toward the front end side of the tubular member 11. Can be moved (see Figure 3).

(Structure of lock mechanism)
Next, the configuration of the lock mechanism 1R included in the bird damage prevention device 10 according to the embodiment will be described. 2 or 4, the lock mechanism 1R can stop the main shaft member 15 with respect to the tubular member 11 at a predetermined position in the axial direction.

2 or 4, the lock mechanism 1R includes a bellows shaft portion 15b and a sphere 11b. The bellows shaft portion 15b is continuous in the axial direction of the main shaft member 15. Further, the bellows shaft portion 15b has a plurality of corrugated folds 151 arranged continuously on the outer periphery thereof.

With reference to FIG. 4, the spherical body 11 b is arranged inside the flange portion 11 f of the tubular member 11. The spherical body 11b is biased by a compression coil spring 11s. The storage chamber that stores the sphere 11b and the compression coil spring 11s is closed by a stopper 11p. Then, the spherical body 11b can be rotatably abutted on the folds 151 of the bellows shaft portion 15b.

Referring to FIG. 4, the spherical body 11b applies a force to the recess 152 between the folds 151 and 151 from the outer peripheral direction of the bellows shaft portion 15b toward the central portion. Accordingly, when the bellows shaft portion 15b is moved in the axial direction with respect to the tubular member 11, the main shaft member 15 can be stopped at an arbitrary position with respect to the tubular member 11. That is, the plurality of branch rods 16 can be moved back and forth all at once from the tip end portions of the branch members 12, 13 and 14 with an arbitrary length.

(Structure of tubular member)
Next, the configuration of the branch rod 16 according to the embodiment will be described. 1 to 4, the branch rod 16 is preferably made of an insulating synthetic resin. A cylindrical branch bar 16 can be obtained by molding a synthetic resin having an insulating property.

Further, referring to FIGS. 1 to 4, the branch bar 16 is preferably made of a synthetic resin having elasticity. The tip end side of the branch bar 16 is guided by the lead-out hole Hi and bent, and can be forwardly and backwardly projected from the tip edges of the branch members 12, 13, 14. The base end portion of the branch rod 16 can be fixed to the outer periphery of the main shaft member 15 by using a joining means such as adhesion or welding. In this case, the base end portion of the branch rod 16 is preferably fitted in the groove 15d (see FIG. 4).

(Structure of metal fittings)
Next, the configuration of the bird damage prevention tool 10 will be described. With reference to FIG. 1 or FIG. 5, the bird damage prevention tool 10 further includes a arm mount attachment 2. The arm-fitting metal fitting 2 has a support portion 2s on one end side and a holding portion 2k on the other end side.

Referring to FIG. 1, the supporting portion 2s can support the other end of the tubular member 11 in a state where the tubular member 11 is upright. The holding portion 2k can be attached to and detached from the armrest A.

With reference to FIG. 1 or FIG. 5, the arm-fitting metal fitting 2 includes a C-channel first gripping metal fitting 21 and a crank-shaped second gripping metal fitting 22. Further, the armor fitting 2 includes a bolt member 23 and a grip piece 24.

With reference to FIG. 1 or FIG. 5, the middle portion of the second grip fitting 22 is joined to the bottom surface of the first grip fitting 21 by welding. One end side of the first grip fitting 21 and one end side of the second grip fitting 22 are arranged so as to face each other.

Referring to FIG. 5B, a mounting hole 21h is opened at one end of the first grip 21. Referring to FIG. 5(E), a mounting hole 22h is opened at one end of the second grip fitting 22. The mounting hole 21h and the mounting hole 22h are arranged concentrically. Further, the extending portion 11t of the tubular member 11 can be inserted into the mounting hole 21h (see FIG. 1). The bellows shaft portion 15b can be projected from the mounting hole 22h (see FIG. 1).

Referring to FIG. 2 or 3, a male screw portion 111 is formed on the other end side of the extending portion 11t. By inserting the other end of the extending portion 11t into the mounting hole 21h and fastening a pair of nuts 11n and 11n to the male screw portion 111, the support portion 2s is tubular with the tubular member 11 standing upright. The other end of the member 11 can be supported.

Further, referring to FIG. 1 or 5, the other end side of the first grip fitting 21 and the other end side of the second grip fitting 22 are arranged to face each other. Between the other end side of the first grip fitting 21 and the other end side of the second grip fitting 22, the arm A can be introduced from the outer peripheral direction.

Referring to FIG. 1 or 5, the bolt member 23 has a rotary shaft 23s joined to the head in a T-shape. Both ends of the rotating shaft 23s are rotatably connected to the bent pieces of the first grip 21. As shown by an imaginary line in FIG. 5A, when the bolt member 23 is rotated counterclockwise, the arm A can be introduced into the holding portion 2k of the arm mount fitting 2.

On the other hand, referring to FIG. 1 or 5, after the arm A is introduced into the holding portion 2k of the arm mount fitting 2, the bolt member 23 is rotated clockwise to fasten the nut member to the bolt member 23. Thus, the arm A can be held between the other end side of the first grip fitting 21 and the other end side of the second grip fitting 22.

Referring to FIG. 1 or 5, the gripping piece 24 is joined to the middle portion of the second grip fitting 22 by welding. The gripping piece 24 can be gripped by using the insulating operation rod 5 described later. Then, the bird damage prevention tool 10 can be moved in a state in which the arm attachment fitting 2 is attached to the bird damage prevention tool 10.

(Structure of insulated operating rod)
Next, the structure of the insulating operation rod for operating the bird damage prevention tool 10 with the armor fitting 2 will be described.

With reference to FIG. 6 or 7, the insulating operation rod 5 includes a long operation rod 51 and a gripping tool 52. Further, the insulating operating rod 5 includes an operating rod 53. The gripping tool 52 is attached to the tip of the operating rod 51.

Referring to FIG. 6 or 7, the gripping tool 52 is composed of a pair of curved gripping arms 5a and 5b that open and close. The one gripping arm 5a is a fixed arm whose base end is fixed, and the other gripping arm 5b rotates about a rotation shaft 5c provided at the base end of the one gripping arm 5a. It has movable arms.

Referring to FIG. 6, the operating rod 53 is held along the operating rod 51. The tip of the actuation rod 53 is rotatably connected to the other gripping arm 5b. Then, by operating the operation lever 54 provided at the proximal end portion of the actuation rod 53, one gripping arm 5a can be opened and closed with respect to the other gripping arm 5a. The insulating operation rod 5 has a middle portion between the operation rod 51 and the actuation rod 53 made of an insulating plastic pipe or the like, and has insulation properties suitable for the indirect live-wire construction method.

With reference to FIG. 6, when the operating lever 54 is gripped and the operating lever 54 is brought close to the operating rod 51, one gripping arm 5a can be closed with respect to the other gripping arm 5b. When the operation lever 54 is released, the force of a spring (not shown) connected to the operation lever 54 can open the other gripping arm 5b with respect to the one gripping arm 5a. FIG. 6 or FIG. 7 shows a state in which the other gripping arm 5b is opened to the maximum with respect to the one gripping arm 5a.

With reference to FIG. 6 or FIG. 7, the one gripping arm 5a projects a tapered gripping claw 51a. The grip claw 51a forms a grip surface 50a. The gripping surface 50a is formed substantially parallel to the centrifugal direction from the center of rotation of the rotating shaft 5c. Similarly, the other gripping arm 5b projects a tapered gripping claw 51b. The grip claw 51b forms a grip surface 50b. The gripping surface 50b is arranged with a predetermined opening angle with respect to the gripping surface 50a. 6 or 7, when the operating lever 54 is gripped, the grip surface 50b can be brought closer to the grip surface 50a.

The insulation operating rod 5 shown in FIG. 6 or FIG. 7 is a so-called “insulating cot” in which a pair of gripping claws 51a and 51b can grip a high-voltage distribution line or the like arranged at a high place.

Next, the description of the bird damage prevention tool 10 will be continued. Referring to FIG. 3, by moving the main shaft member 15 toward the base end side of the tubular member 11 from the state where the virtual circumference Cv of the bird damage prevention device 10 is reduced, the bird damage prevention device 10 The imaginary circumference Cv can be expanded (see FIG. 1 or FIG. 2).

With reference to FIGS. 2 to 4, the grip 15g can be gripped by using the pair of gripping arms 5a and 5b provided on the insulating operation rod 5 (see FIG. 6 or FIG. 7). The main shaft member 15 can be operated using the insulating operation rod 5. By using the insulating operation rod 5, the virtual circumference Cv of the bird damage prevention tool 10 can be expanded or contracted.

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

Referring to FIG. 1 or FIG. 3, the bird damage prevention tool 10 has a virtual circumference Cv connecting the tip edges of a plurality of branch bars 16 in a state in which the arm fittings 2 are fixed to the other end of the tubular member 11. Is preferably reduced in diameter (see FIG. 3).

By using the insulating operating rod 5 (see FIG. 6 or FIG. 7) to grip the gripping piece 24 provided on the arm mount attachment 2, and raising the bird damage prevention tool 10 with the arm mount attachment 2, one set is obtained. The bird damage preventive tool 10 can be easily passed between the edge lines We and We (see FIG. 8).

With reference to FIG. 1, after fixing the arm fitting 2 to the arm A, a grip 15g is gripped using the insulating operation rod 5 (see FIG. 6 or 7), and a plurality of main shafts with branch rods 16 are attached. By moving the member 15 toward the base end side of the tubular member 11, the virtual circumference Cv of the bird damage prevention device 10 can be expanded (see FIG. 1 or FIG. 2).

With reference to FIG. 2 or 4, the bird damage prevention tool 10 is provided with a lock mechanism 1R that can stop the main shaft member 15 with the branch rods 16 at a predetermined position in the axial direction with respect to the tubular member 11. Therefore, it is possible to maintain a state in which the imaginary circumference Cv connecting the tip edges of the plurality of branch rods 16 is expanded (see FIG. 1 or FIG. 2). By moving the plurality of main shaft members 15 with the branch rods 16 toward the tip end side of the tubular member 11, the virtual circumference Cv of the bird damage prevention tool 10 can be reduced (see FIG. 3 ).

The bird damage prevention device 10 according to the embodiment has a tubular member 11 extending straight, a plurality of branch members 12, 13, 14, which are arranged in multiple stages in the axial direction of the tubular member 11 and radially protrude from the outer periphery of the tubular member 11. A main shaft member 15 that is arranged to be insertable inside the member 11, and a state in which the base end portion is fixed to the outer circumference of the main shaft member 15, and the tip end side is inclined downward from the tip end edge of the branch members 12, 13, 14 in the outer peripheral direction. It is composed of a plurality of branch rods 16 that can project forward and backward.

The bird damage prevention device 10 according to the embodiment facilitates the bird damage prevention device 10 between a pair of edge lines We, We by reducing the diameter of a virtual circumference Cv that connects the tip edges of the plurality of branch rods 16. The bird's nesting can be made difficult by expanding the virtual circumference Cv that connects the tip ends of the plurality of branch rods 16.

The bird damage prevention device 10 according to the embodiment includes the lock mechanism 1R that can stop the main shaft member 15 with the branch rods 16 at a predetermined position in the axial direction with respect to the tubular member 11. The protrusion length of can be set arbitrarily.

The bird damage prevention device according to the present invention can be expected to have the following effects.
(1) The protrusion length of the flying prevention rod can be set in an optimum state.
(2) The protrusion length of the flying prevention rod can be adjusted while observing the state of the edge line.
(3) The protrusion length of the flying prevention rod can be adjusted after attaching the bird damage prevention device to the arm.
(4) There is no need to remove and cut the flying prevention rod in advance.

Although the bird damage prevention device according to the present invention discloses an embodiment in which eight flying prevention rods are radially arranged on the outer periphery of the tubular member, the number of these flying prevention rods may be increased or decreased.

10 Bird Damage Prevention Tool 11 Tubular Member 12・13・14 Branching Member 15 Main Shaft Member 16 Branch Rod Cv Virtual Circumferential Hi Derivation Hole

Claims (4)

A tubular member that opens at both ends and extends straight,
From the distal end side to the proximal end side of the tubular member, the tubular member is arranged in multiple stages at a constant interval in the axial direction of the tubular member, and radially projects from the outer periphery of the tubular member, and the axial center is A plurality of branching members that open a lead-out hole that intersects the axial center of the tubular member in an inclined state,
A main shaft member that is insertably disposed inside the tubular member;
The bendable branching member having a base end fixed to the outer periphery of the main shaft member, and the tip end side being guided to the lead-out hole and being capable of projecting forward and backward while being inclined downward from the tip end edge of the branching member in the outer peripheral direction. With the same number of branch rods,
In a state in which the main shaft member is moved toward the base end side of the tubular member, the diameter of a virtual circle connecting the tip edges of the plurality of branch rods is expanded,
A bird damage prevention tool for reducing the diameter of an imaginary circle connecting the tip edges of a plurality of the branch rods in a state where the main shaft member moves toward the tip end side of the tubular member. In a state where the tubular member is upright, there is further provided a metal-arm mounting bracket having a support portion for supporting the other end portion of the tubular member at one end portion side, and a holding portion detachable to the arm member at the other end portion side. The bird damage prevention device according to claim 1, which is provided. With respect to the tubular member, further comprises a lock mechanism capable of stopping the main shaft member at a predetermined position in the axial direction,
The locking mechanism is
A bellows shaft portion that is continuous in the axial direction of the main shaft member and has a plurality of wavy folds continuously provided on the outer periphery,
It is arranged inside the tubular member and can rollably abut against the folds of the bellows shaft portion, and a force is exerted from the outer peripheral direction of the bellows shaft portion toward the center portion in the recessed portion between the folds and the folds. The bird damage prevention tool according to claim 1 or 2, further comprising: The bird damage prevention device according to any one of claims 1 to 3, wherein the main shaft member has a grip at a base end portion that can be operated by an insulating operation rod having a pair of opening and closing gripping arms at a tip end portion.

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