JP7172737B2 - Bird damage prevention tool - Google Patents

Description

The present invention relates to a bird damage prevention tool. In particular, the present invention 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 build nests on facilities installed on utility poles, there is concern that power outages will occur due to the nests. For example, when birds bring wires and the like to utility poles to build their nests, there is a concern that the wires may come into contact with the wires and cause a short circuit.

In order to prevent such bird damage, there is known a bird damage preventive device that prevents birds from flying and nesting by attaching a nest preventive device with an umbrella-like framework to a cross arm installed on a utility pole.

An umbrella-shaped bird damage prevention device according to the prior art includes a main shaft member arranged vertically, and a plurality of branches whose base ends are fixed to the outer circumference of the main shaft member and extend radially around the main shaft member in a downwardly inclined state. It consists of sticks. On the other hand, the space on the utility pole in which birds can nest differs depending on the mounting condition of cross arms and the presence or absence of switches or transformers. For this reason, there is a concern that bird damage preventive devices according to the prior art cannot effectively prevent bird damage because nesting spaces remain depending on the state of the utility pole arrangement.

In view of the above problems, conventional bird damage preventive tools have been designed to respond to the installation conditions of utility poles so that branch rods can be freely extended in the required space to ensure that birds do not fly in and nest. A device for preventing bird damage has been disclosed (see Patent Document 1, for example).

Japanese Patent Application Laid-Open No. 2005-110571

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

Referring to FIG. 9, a utility pole P has a pair of arms A and A fixed horizontally on its top. The strap St is fixed to the cross arm A via the pin insulator Pi. A pair of tension insulators Si and Si are arranged on both sides of a pair of arms A and A. A pair of tension insulators Si and Si are oscillatably connected to each other. One tension insulator Si is connected to a cross arm A via a strap St. The other tension insulator Si pivotably connects the anchor clamp Ci.

Referring to FIG. 9, the anchor clamp Ci is covered with an insulating cover. The anchor clamp Ci clamps an overhead distribution line (hereinafter referred to as "wire") W inside thereof. In the anchoring pole shown in FIG. 9, the electric wire W is supported on the electric pole P by attaching the tension insulator Si connected to the anchoring clamp Ci that clamps the electric wire W to the cross arm A supported on the electric pole P. A wire W is laid between a pair of anchor clamps Ci and Ci without tension. A portion of the electric wire W that bypasses the utility pole P is called an edge line We, for example. Although the edge line We is not illustrated in Patent Document 1, the edge line We is provided in most cases.

Referring to FIG. 9, the bird damage prevention device 9 includes a main shaft member 91 arranged vertically, a plurality of branch members 92 connected in the axial direction of the main shaft member 91, and a state inclined downward from the branch members 92. and has a branch rod 93 fixed to a branch member 92 at its proximal end.

Referring to FIG. 9, a bird damage prevention device 9 is fixed to the cross arm A via a cross arm fitting Br. The main shaft member 91 can be arranged vertically by inserting the lower end of the main shaft member 91 into the cylindrical portion provided on the tip end side of the arm fitting Br. Also, by arranging the plurality of branch rods 93 radially, it is possible to prevent birds from flying and nesting. Since the branch rod 93 is supported in a downwardly inclined state, even if a wire or the like for building a nest is brought in, the wire falls along the inclination, making it difficult to build the nest.

Referring to FIG. 9, the bird damage prevention device 9 according to Patent Document 1 can easily cut the branch rod 93 to an appropriate length using a cutter. In addition, the 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 preventive device 9 according to Patent Document 1 is fixed to the cross arm fitting Br by lowering the bird damage preventive device 9 from above the cross arm A. It is easier to work by lifting the This is the same for existing nest guards with an umbrella-shaped framework.

However, when the bird damage prevention device is lifted from below the cross arm, it must pass between a pair of edge lines We, We, and a plurality of radially spreading branch rods interfere with the pair of edge lines. There is a problem that it is difficult to pass between We and We.

If an attempt is made to forcibly pass the bird damage prevention device between a pair of edge lines We, it is necessary to cover the edge lines We with protective equipment such as an insulating sheet in advance, which increases the number of work processes. be. There is a need for a bird deterrent that can be easily passed between a pair of edge lines. And the above can be said to be the subject of the present invention.

The present invention has been made in view of such problems, and it is possible to easily pass between a pair of edge lines, and after passing between a pair of edge lines, birds build a nest on the utility pole. To provide a bird damage preventive tool for preventing

The present inventor has developed a tubular member that extends straight, a plurality of branch members that are arranged in multiple stages in the axial direction of the tubular member and protrude radially from the outer periphery of the tubular member, a main shaft member that is freely inserted into the tubular member, and a base. A plurality of branch rods whose end portions are fixed to the outer periphery of the main shaft member and whose tip end portions are inclined downward in the outer peripheral direction from the tip edge of the branch member, and which can protrude freely forward and backward; When constructing a bird damage prevention device with needle leaf members branched into two branches and passing the bird damage prevention device between a pair of edge lines, the imaginary circumference connecting the tip edges of a plurality of branch rods When reducing the diameter and installing the bird damage prevention device on the cross arm, we believe that the above problem can be solved by expanding the diameter of the imaginary circumference connecting the tip edges of the multiple branch rods. , led to the invention of a new bird damage prevention device as follows.

(1) A bird damage prevention device according to the present invention comprises a straight tubular member having both ends opened, and a constant axial direction of the tubular member extending from the distal end side to the proximal end side of the tubular member. a plurality of branch members arranged in multiple stages at intervals, protruding radially from the outer periphery of the tubular member, and having lead-out holes whose axial centers intersect the axial centers of the tubular members in an inclined state; A main shaft member that is freely inserted into the tubular member, a base end portion of which is fixed to the outer periphery of the main shaft member, and a tip portion side of which is guided by the lead-out hole and inclined downward from the tip end edge of the branch member in the outer peripheral direction. branch rods, which can protrude back and forth freely in a state of being bendable, and needle leaf members bifurcated from intermediate portions toward tip portions of the branch rods; In the state of moving toward the proximal end of the tubular member, the virtual circumference connecting the distal edges of the plurality of branch rods is expanded in diameter, and the main shaft member moves toward the distal end of the tubular member. In this state, the virtual circumference connecting the tip edges of the plurality of branch rods is reduced in diameter.

(2) It is preferable that the plurality of branch members are arranged in two stages in the axial direction of the tubular member.

(3) The bird damage preventive device according to the present invention has a supporting portion on one end side for supporting the other end portion of the tubular member in an upright state, and a holding portion detachable from the cross arm. It is preferable to further include a cross arm mounting metal fitting provided on the other end side.

(4) Further provided is a lock mechanism capable of axially stopping the main shaft member at a predetermined position relative to the tubular member, wherein 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 continuously provided on the outer periphery; a bellows shaft portion disposed inside the tubular member; and a sphere biasing the force from the outer peripheral direction toward the center.

(5) It is preferable that the main shaft member has a grip at its proximal end which can be operated by an insulating operating rod having a pair of opening and closing gripping arms at its distal end.

A bird damage preventive device according to the present invention comprises a straight tubular member, a plurality of branch members arranged in multiple stages in the axial direction of the tubular member, and a plurality of branch members protruding radially from the outer circumference of the tubular member, and arranged so as to be freely insertable inside the tubular member. a main shaft member, a base end fixed to the outer circumference of the main shaft member, a plurality of branch rods protruding freely forward and backward in a state in which the tip end side is inclined downward from the tip end edge of the branch member in the outer peripheral direction, and from the intermediate part of the branch rods A needle leaf member bifurcated toward the distal end constitutes a bird damage prevention device, and by moving the main shaft member toward the distal end side of the tubular member, it is possible to connect the distal edges of a plurality of branch rods. The diameter of the circumference can be reduced, the bird damage prevention device can be easily passed between the pair of edge lines, and the main shaft member can be moved toward the base end side of the tubular member to reduce the tip edges of the plurality of branch rods. The diameter of the imaginary circle that connects the

1 is a perspective view showing the configuration of a bird damage prevention tool according to an embodiment of the present invention; FIG. It is a front view of the bird damage prevention tool by the said embodiment, and is an open state figure of a bird damage prevention tool. It is a front view of the bird damage prevention tool by the said embodiment, and is a closed state figure of a bird damage prevention tool. It is the perspective exploded view which expanded the principal part by the side of the base end part of the bird damage prevention tool by the said embodiment. FIG. 5A is a plan view of the bird damage prevention device according to the embodiment, FIG. It is a state figure which diameter-reduced the imaginary circumference which connects the front edge of a branch stick. Fig. 6(A) is a front view of the cross arm fitting, and Fig. 6(B) is a plan view of the cross arm fitting. Fig. 6(C) is a right side view of the arm fitting, Fig. 6(D) is a left side view of the arm fitting, and Fig. 6(E) is a bottom view of the arm fitting. . 1 is a front view showing a configuration of an example of an insulated operating rod according to the present invention; FIG. FIG. 8 is an enlarged front view of the main part of FIG. 7; FIG. 10 is a perspective view showing a mounting state of a bird damage prevention device according to the prior art;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Configuration of bird damage prevention tool]
First, the configuration of a bird damage prevention device according to an embodiment of the present invention will be described. Components having the same reference numerals as those used in the prior art have the same functions, and therefore the explanations thereof may be omitted.

(overall structure)
Next, the overall configuration of the bird damage prevention tool according to one 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 comprises a tubular member 11 extending straight and arranged in two stages in the axial direction of the tubular member 11, and radially extending from the outer circumference of the tubular member 11. It has a pair of branch members 12 and 13 that protrude outwards. The bird damage prevention device 10 also includes a main shaft member 15 and a plurality of bendable branch rods 16 . Further, the bird damage prevention tool 10 is provided with needle leaf members 17 bifurcated from the middle part of the branch rod 16 toward the tip part thereof.

1-4, tubular member 11 is open at both ends. The pair of branch members 12 and 13 are arranged in two stages from the distal end side to the proximal end side of the tubular member 11 with a certain interval in the axial direction of the tubular member 11 . These branch members 12 and 13 radially protrude from the outer circumference of the tubular member 11 . These branch members 12, 13, and 14 have lead-out holes Hi. The center of the axis of the lead-out hole Hi crosses the center of the axis of the tubular member 11 in an inclined state.

1 to 4, the main shaft member 15 is arranged so as to be freely insertable inside the tubular member 11 . A plurality of branch rods 16 have their base end portions fixed to the outer circumference of the main shaft member 15 . Further, the branch rod 16 has its tip end side guided to the lead-out hole Hi, and can protrude from the tip edges of the branch members 12, 13, 14 in a downwardly inclined state in the outer peripheral direction so as to advance and retreat freely.

1 or 2 and FIG. 5(A), the pair of needle leaf members 17, 17 extend outward from the branch rod 16 when the distal end side of the branch rod 16 protrudes from the lead-out hole Hi. curved towards. On the other hand, referring to FIG. 1 or FIG. 3 and FIG. 5(B), in a state in which the tip portion side of the branch rod 16 is drawn into the outlet hole Hi, the pair of needle leaf members 17 and 17 are inserted into the outlet hole Hi. Guided and converged. The branch rod 16 is preferably provided with grooves for accommodating the pair of needle members 17,17.

1 or 2, when the main shaft member 15 moves toward the base end of the tubular member 11, the virtual circumference Cv connecting the tip edges of the plurality of branch rods 16 is expanded. there is On the other hand, referring to FIG. 3, when the main shaft member 15 moves toward the distal end of the tubular member 11, the virtual circumference Cv connecting the distal edges of the plurality of branch rods 16 is reduced in diameter.

Referring to FIGS. 1 to 3, a bird damage prevention device 10 according to the embodiment includes a straight tubular member 11, a plurality of tiers arranged in the axial direction of the tubular member 11, and radially protruding from the outer periphery of the tubular member 11. Branching members 12 and 13, a main shaft member 15 inserted freely inside the tubular member 11, a base end portion fixed to the outer periphery of the main shaft member 15, and a tip portion side descending from the tip edge of the branching members 12 and 13 in the outer peripheral direction. It is composed of a plurality of branch rods 16 which can protrude freely forward and backward in an inclined state, and a needle leaf member 17 bifurcated from the middle part of the branch rod toward the tip part.

Referring to FIG. 9, when the bird damage prevention tool 10 is passed between a pair of edge lines We and We, the main shaft member 15 is moved toward the distal end side of the tubular member 11, so that a plurality of A virtual circumference Cv connecting the tip edges of the branch rods 16 can be reduced in diameter (see FIG. 3). As a result, the bird damage prevention device 10 can be easily passed between the pair of edge lines We and We.

Referring to FIG. 9, after the bird damage prevention device 10 is passed between a pair of edge lines We and We, the main shaft member 15 is moved toward the proximal end side of the tubular member 11, whereby a plurality of 1 or 2). In the state shown in FIG. 1 or 2, the plurality of branch rods 16 and the pair of needle leaf members 17, 17 are inclined downward, making it difficult for birds to nest.

(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 disk-shaped collar portion 11f and a tubular extension portion 11t.

(Composition of the flange)
Referring to FIGS. 1-4, collar 11 f is joined to the proximal edge of tubular member 11 . The tubular member 11 and the collar portion 11f may be molded integrally. The collar portion 11f has an outer diameter larger than that of the tubular member 11. As shown in FIG. The brim portion 11f internally holds a spherical body 11b that constitutes a lock mechanism 1R, which will be described later (see FIG. 2 or FIG. 4). Further, the collar 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 movable back and forth.

(Construction of extension part)
1 to 4, the extension 11t protrudes coaxially with the tubular member 11 from the bottom surface of the flange 11f. It is preferable that the extension 11 t has an outer diameter smaller than that of the tubular member 11 . The bellows shaft portion 15b is inserted through the extension portion 11t (see FIG. 2 or FIG. 4). Moreover, the extension part 11t has a male threaded part 111 formed on its outer circumference (see FIG. 2 or FIG. 3). A nut 11n can be screwed onto the male threaded portion 111 (see FIG. 1).

(Structure of branch member)
Next, the configuration of the branch members 12 and 13 according to the embodiment will be described. Referring to FIGS. 1 to 4, the bird damage prevention device 10 has a plurality of branch members 12 arranged on its upper stage and a plurality of branch members 13 arranged on its lower stage. Although the branching members 12 and 13 are the same, they are distinguished by different reference numerals for convenience of explanation.

Referring to FIG. 5, the plurality of branch members 12 extend crosswise at their distal ends. The plurality of branch members 13 extend crosswise at their distal end portions. However, the plurality of branching members 13 are displaced from the plurality of branching members 12 by approximately 45 degrees in plan view. In other words, the plurality of branching members 12 and 13 are arranged in a state of being divided into eight equal parts in plan view.

Referring to FIGS. 1 to 4, the pair of branch members 12 and 13 have the same shape, so the branch member 13 will be representatively described below. Referring to FIG. 2 or 3, the branch member 13 has a truncated cone shape having a hollow inside at its proximal end. Further, the branch member 13 has a cylindrical tip portion side. The lead-out hole Hi communicates with the inside of the tubular member 11 . The lead-out hole Hi can guide the branch rod 16 and the pair of needle leaf members 17, 17 so as to advance and retreat.

1 to 4, the tubular member 11 and the branch member 13 may be constructed separately, and the proximal end of the branch member 13 may be joined to the outer circumference of the tubular member 11. As shown in FIG. The tubular member 11 and the branch member 13 can also be integrally molded.

(Structure of main shaft member)
Next, the configuration of the main shaft member 15 according to the embodiment will be described. 1 to 3, the main shaft member 15 has a disk-shaped flange portion 15f on its head. The flange portion 15f has an outer diameter substantially equal to that of the tubular member 11. As shown in FIG.

Referring to FIG. 2 , when main shaft member 15 is moved toward the base end portion of tubular member 11 , flange portion 15 f comes into contact with the distal end edge of tubular member 11 , thereby causing main shaft member 15 to move relative to tubular member 11 . can specify the stop position of

Referring to FIG. 4, the main shaft member 15 is formed with eight grooves 15d formed in an arcuate shape from the outer periphery. These grooves 15d are bored from the tip edge to the base edge of the main shaft member 15. As shown in FIG. The proximal ends of the branch rods 16 are fixed to these grooves 15d using joining means such as adhesion. Further, the distal end side of the branch rod 16 can be introduced into these grooves 15d.

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

A grip 15g can be gripped by using a pair of gripping arms 5a and 5b (see FIG. 7 or 8) provided on an insulating operation rod 5, which will be described later. By operating an insulating operation rod 5, which will be described later, the main shaft member 15 can be moved toward the proximal end side of the tubular member 11 (see FIG. 2), and the main shaft member 15 can be moved toward the distal end side of the tubular member 11. It can move (see Figure 3).

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

2 or 4, the locking mechanism 1R includes a bellows shaft portion 15b and a spherical body 11b. The bellows shaft portion 15b is continuous with the main shaft member 15 in the axial direction. Further, the bellows shaft portion 15b has a plurality of wave-like folds 151 continuously provided on the outer periphery.

Referring to FIG. 4, the spherical body 11b is arranged inside the collar portion 11f of the tubular member 11. As shown in FIG. The ball 11b is biased by a compression coil spring 11s. A housing chamber containing the ball 11b and the compression coil spring 11s is closed by a stopper 11p. The ball 11b can rollably abut on the folds 151 of the bellows shaft portion 15b.

Referring to FIG. 4, the ball 11b applies a force to the depression 152 between the folds 151 from the outer peripheral direction of the bellows shaft 15b toward the center. As a result, when the bellows shaft portion 15 b is axially moved 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 . In other words, the plurality of branch rods 16 can be advanced and retracted all at once from the distal ends of the branch members 12, 13, and 14 with arbitrary lengths.

(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 insulating synthetic resin. A cylindrical branch rod 16 can be obtained by molding an insulating synthetic resin.

1 to 4, the branch rod 16 is preferably made of elastic synthetic resin. The tip portion side of the branch rod 16 is guided to the lead-out hole Hi and bent, and can protrude from the tip edges of the branch members 12, 13, and 14 so as to advance and retreat. The proximal end portion of the branch rod 16 can be fixed to the outer periphery of the main shaft member 15 by using joining means such as adhesion or welding. In this case, it is preferable that the proximal end portion of the branch rod 16 is fitted in the groove 15d (see FIG. 4).

(Structure of Needle Member)
Next, the configuration of the needle leaf member 17 according to the embodiment will be described. Referring to FIGS. 1 to 3 and 5, the needle member 17 is preferably made of insulating synthetic resin. A cylindrical needle leaf member 17 can be obtained by molding an insulating synthetic resin.

1 to 3 and 5, the needle member 17 is preferably made of elastic synthetic resin. The needle leaf member 17 is led to the lead-out hole Hi and converges, and can protrude from the tip edges of the branch members 12 and 13 so as to advance and retreat. The proximal end portion of the needle leaf member 17 can be fixed to the outer periphery of the branch rod 16 using joining means such as adhesion or welding. In this case, it is preferable to provide a groove for accommodating the needle leaf member 17 on the tip side of the branch rod 16 .

(Composition of cross arm mounting bracket)
Next, the configuration of the bird damage prevention device 10 will be described. Referring to FIG. 1 or FIG. 6 , the bird protection device 10 further includes a cross arm fitting 2 . The cross arm 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 support part 2s can support the other end of the tubular member 11 while the tubular member 11 is standing. The holding portion 2k can be attached to and detached from the arm A.

Referring to FIG. 1 or FIG. 6, the cross arm fitting 2 includes a C-channel-shaped first gripping fitting 21 and a crank-shaped second gripping fitting 22 . Also, the cross arm fitting 2 has a bolt member 23 and a gripping piece 24 .

Referring to FIG. 1 or FIG. 6, the intermediate portion of the second gripping metal fitting 22 is joined to the bottom surface of the first gripping metal fitting 21 by welding. One end side of the first gripping metal fitting 21 and one end side of the second gripping metal fitting 22 are arranged to face each other.

Referring to FIG. 6B, a mounting hole 21h is opened at one end of the first gripping metal fitting 21. As shown in FIG. Referring to FIG. 6(E), a mounting hole 22h is opened on one end side of the second gripping metal fitting 22. As shown in FIG. 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 protrude from the mounting hole 22h (see FIG. 1).

Referring to FIG. 2 or 3, a male threaded portion 111 is formed on the other end side of the extension portion 11t. By inserting the other end side 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 can be formed into a tubular shape with the tubular member 11 standing upright. The other end of member 11 can be supported.

1 or 6, the other end side of the first gripping metal fitting 21 and the other end side of the second gripping metal fitting 22 are arranged to face each other. Between the other end side of the first gripping metal fitting 21 and the other end side of the second gripping metal fitting 22, the cross arm A can be introduced from the outer peripheral direction.

Referring to FIG. 1 or FIG. 6, the bolt member 23 joins the rotating shaft 23s to the head in a T shape. Both ends of the rotating shaft 23s are rotatably connected to the bent pieces of the first gripping metal fitting 21 . As shown by the 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 fitting 2.

On the other hand, referring to FIG. 1 or FIG. 6, after the arm A is introduced into the holding portion 2k of the arm fitting 2, the bolt member 23 is rotated clockwise to fasten the nut member to the bolt member 23. , the cross arm A can be held between the other end side of the first gripping metal fitting 21 and the other end side of the second gripping metal fitting 22 .

1 or 6, the grip piece 24 is welded to the intermediate portion of the second grip fitting 22. As shown in FIG. The grip piece 24 can be gripped by using the insulating operation rod 5, which will be described later. Then, the bird damage preventive tool 10 can be moved in a state where the cross arm fitting 2 is attached to the bird damage preventive tool 10.例文帳に追加

(Configuration of insulated operating rod)
Next, the configuration of the insulated operating rod for operating the bird damage prevention device 10 with the cross arm fitting 2 will be described.

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

7 or 8, the gripping tool 52 consists of 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. 6 or 7, gripping the operating lever 54 allows the gripping surface 50b to approach 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.

Next, the description of the bird damage prevention device 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 in diameter, the bird damage prevention device 10 can be expanded (see FIG. 1 or FIG. 2).

2 to 4, a grip 15g can be gripped using a pair of gripping arms 5a and 5b provided on the insulated operating rod 5 (see FIG. 6 or 7). The insulated operating rod 5 can be used to operate the main shaft member 15 . Using the insulating operating rod 5, the diameter of the virtual circumference Cv of the bird damage prevention device 10 can be expanded or reduced.

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

Referring to FIG. 1 or FIG. 3 , the bird damage prevention device 10 has a cross arm mounting bracket 2 fixed to the other end of a tubular member 11 , and a virtual circumference Cv connecting tip edges of a plurality of branch rods 16 . is preferably reduced in diameter (see FIG. 3).

Using the insulated operating rod 5 (see FIG. 7 or 8), grasp the gripping piece 24 provided on the metal arm mounting bracket 2 and raise the bird damage prevention device 10 with the metal arm mounting bracket 2. The bird damage prevention device 10 can be easily passed between the edge lines We and We (see FIG. 9).

Referring to FIG. 1, after fixing the cross arm fitting 2 to the cross arm A, the insulated operation rod 5 is used (see FIG. 7 or 8) to grip the grip 15g and to 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 2).

2 or 4, the bird damage prevention device 10 has a lock mechanism 1R capable of axially stopping the main shaft member 15 with a plurality of branch rods 16 at a predetermined position with respect to the tubular member 11. As shown in FIG. Therefore, the virtual circumference Cv connecting the tip edges of the plurality of branch rods 16 can be maintained in an expanded state (see FIG. 1 or FIG. 2). By moving the main shaft member 15 with the plurality of branch rods 16 toward the distal end side of the tubular member 11, the virtual circumference Cv of the bird damage prevention device 10 can be reduced in diameter (see FIG. 3).

The bird damage prevention device 10 according to the embodiment comprises a tubular member 11 extending straight, a plurality of branch members 12 and 13 arranged in two stages in the axial direction of the tubular member 11 and protruding radially from the outer periphery of the tubular member 11, and a tubular member. 11, the base end portion is fixed to the outer periphery of the main shaft member 15, and the tip portion side is inclined downward from the tip edge of the branch members 12, 13, 14 in the outer peripheral direction so as to advance and retreat freely. It is composed of a plurality of branch rods 16 that can protrude outward, and needle leaf members 17 bifurcated from the middle part of the branch rod 16 toward the tip part.

In the bird damage prevention device 10 according to the embodiment, the virtual circumference Cv connecting the tip edges of the plurality of branch rods 16 is reduced in diameter, so that the bird damage prevention device 10 can be easily positioned between the pair of edge lines We and We. By enlarging the imaginary circumference Cv connecting the tip edges of the plurality of branch rods 16, it is possible to make it difficult for birds to nest.

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

Referring to FIG. 5, the bird damage prevention tool 10 according to the embodiment includes needle leaf members 17 bifurcated from the intermediate portion toward the tip portion of the branch rod 16. Unlike a bird damage prevention device, a large number of branch rods are not arranged from the main shaft member, and the number of branch rods can be reduced to secure a space where birds have difficulty nesting.

The bird damage prevention tool according to the present invention can be expected to have the following effects.
(1) The protruding length of the flying prevention bar can be set in an optimum state.
(2) It is possible to adjust the protruding length of the anti-flying bar while observing the state of the edge line.
(3) The projection length of the flying prevention bar can be adjusted after the bird damage prevention tool is attached to the cross arm.
(4) There is no need to previously remove or cut the fly-inhibiting bar that is an obstacle.
(5) By reducing the number of branch rods, it is possible to secure a space in which it is difficult for birds to nest.

Although the bird damage prevention tool according to the present invention has disclosed an embodiment in which eight flying prevention rods are radially arranged on the outer circumference of the tubular member, it is also conceivable to increase or decrease the number of these flying prevention rods.

REFERENCE SIGNS LIST 10 bird damage prevention tool 11 tubular member 12, 13 branching member 15 main shaft member 16 branch rod 17 pair of needle members Cv virtual circumference Hi lead-out hole

Claims (5)

a straight tubular member having both ends open;
From the distal end side to the proximal end side of the tubular member, they are arranged in multiple stages at regular intervals in the axial direction of the tubular member, protrude radially from the outer periphery of the tubular member, and have the axis centered as the above. a plurality of branching members having lead-out holes that intersect the axial center of the tubular member in an inclined state;
a main shaft member disposed so as to be freely insertable inside the tubular member;
The bendable branch member has a base end portion fixed to the outer periphery of the main shaft member, and a tip portion side thereof is guided to the lead-out hole so as to protrude from the tip end edge of the branch member in a downwardly inclined state toward the outer peripheral direction. with the same number of branches as
a needle leaf member bifurcated from the middle part of the branch rod toward the tip part,
in a state in which the main shaft member moves toward the base end portion of the tubular member, the virtual circumference connecting the tip edges of the plurality of branch rods is expanded in diameter;
A bird damage prevention tool, wherein, when the main shaft member moves toward the tip end side of the tubular member, a virtual circumference connecting the tip edges of the plurality of branch rods is reduced in diameter. 2. A bird damage prevention device according to claim 1, wherein said plurality of branch members are arranged in two stages in the axial direction of said tubular member. Further, a cross arm fitting having a supporting part on one end side for supporting the other end part of the tubular member in an upright state, and a cross arm attaching part on the other end side having a holding part detachable from the cross arm. 3. The bird damage prevention device according to claim 1 or 2, comprising: further comprising a lock mechanism capable of stopping the main shaft member at a predetermined position in the axial direction with respect to the tubular member;
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 pleats that are connected to the outer periphery;
It is disposed inside the tubular member and is capable of rollingly contacting the folds of the bellows shaft, and a force is applied to the recess between the folds from the outer peripheral direction of the bellows shaft toward the center. 4. A bird protection device according to any one of claims 1 to 3, comprising a sphere biased to 5. A bird damage prevention tool according to claim 1, wherein said main shaft member has a grip at its base end which can be operated by an insulating operating rod having a pair of gripping arms at its tip end for opening and closing.

Images