JP5405350B2 - Bird damage prevention tool - Google Patents

Description

  The present invention relates to a bird damage prevention device installed on an overhead line in order to prevent damage such as excrement caused by a bird flying on an overhead line such as an electric wire, a ground fault, and a short circuit accident.

  Conventionally, birds that stop on overhead lines cause damage (feces) due to excretion, or damage to the sheath of electric wires, causing ground faults and short circuit accidents. As a bird damage prevention tool for preventing such bird damage, there is provided a tool wound around an overhead wire in a spiral shape (for example, see Patent Document 1).

  This kind of bird harm prevention tool is comprised by the elongate base wound directly with respect to an overhead wire, and the protrusion part which protrudes outside from the surface of a base, for example. The protrusions are intermittently arranged at predetermined intervals in the longitudinal direction of the base, or are continuously provided in the longitudinal direction. Moreover, the shape of the protrusion is formed in a rod shape or is formed so as to become sharper outward from the surface of the base.

  Thereby, since the protrusion part becomes obstructive when the bird tries to stop on an overhead line, the bird damage prevention tool of the said structure can prevent that a bird stops on an overhead line.

JP 2007-151426 A

  However, the bird damage prevention device having the above configuration has a base that is directly wound around the overhead wire, so that the contact area (contact resistance) between the overhead wire and the base becomes large, and it is difficult to change the mounting position in a state of being wound around the overhead wire. there were. Therefore, the operator needs to wrap the bird damage prevention tool around the overhead wire while changing the work position, and spends a lot of time and labor on the attachment work. That is, since the installation work of the bird damage prevention device to the overhead line is performed by an operator riding on the bucket of the aerial work vehicle, when the bird damage prevention device having the above configuration is attached to the overhead line, the bird damage prevention device is attached to the installation position of the bird damage prevention device. It was necessary to perform complicated work such as attaching a bird harm prevention tool while moving the bucket.

  Then, in view of such a situation, this invention makes it a subject to provide the bird damage prevention tool which can be attached to an overhead wire, without changing a work position.

A bird damage prevention device according to the present invention includes a base formed in a spiral shape with a length in one direction, and a prevention device main body having a projecting portion projecting outward from the surface of the base. In the bird damage prevention device spirally wound around the overhead wire, the base is formed in a mountain having a vertex at the center in the short direction perpendicular to the longitudinal direction, and descends toward both ends in the short direction. A pair of inclined portions, the opposing surface of the inclined portion facing the overhead line is a concave curved surface, and the tip of the inclined portion is formed in line contact with the outer peripheral surface of the overhead wire . It is characterized in that a plurality of first overhead wire contact portions projecting partially on the facing surface facing the overhead wire and making point contact with the overhead wire are formed at intervals in the longitudinal direction.

  According to the bird damage prevention device having the above-described configuration, the first overhead wire contact portion makes point contact with the outer peripheral surface of the overhead wire in a state where the prevention device main body is attached to the overhead wire. As a result, the bird damage prevention device has a smaller contact area with the overhead wire of the prevention device main body, so that the contact resistance generated between the prevention device main body and the overhead wire is also reduced, and the prevention tool main body is wound around the overhead wire. Even in the state, the mounting position can be easily changed by sliding (moving) in the longitudinal direction of the overhead wire. Therefore, the operator can attach the prevention tool main body to the overhead line without changing the work position, and the time and labor spent on the work can be reduced.

  As one aspect of the present invention, the prevention device main body is configured by a part of the ball in which a ball is rotatably mounted on the facing surface side of the base and the first overhead wire contact portion protrudes from the facing surface. preferable. If it does in this way, the 1st overhead wire contact part comprised by a part of ball will carry out point contact with the outer peripheral surface of an overhead wire in the state which attached the prevention tool main body to the overhead wire.

  And if it is going to move the prevention tool main body attached to the overhead wire, the ball which comprises the 1st overhead wire contact part will rotate by contact with an overhead wire. Thereby, the bird damage prevention tool of the said structure can reduce the contact resistance of an overhead wire and a prevention tool main body, and can move the prevention tool main body wound around the overhead wire easily. In this case, it is preferable that a lubricant is filled between the ball and the base. In this way, since the ball rotates more smoothly, the contact resistance between the overhead wire and the prevention tool main body can be further reduced.

  As another aspect of the present invention, a plurality of the prevention device main bodies and a connection member that connects the prevention device main bodies are further provided, and the connection member is configured to be attachable to the overhead wire in a state of surrounding a part of the overhead wire. A plurality of second overhead wire contact portions partially protruding on the inner peripheral surface facing the overhead wire may be formed at intervals in the circumferential direction. If it does in this way, a 2nd overhead wire contact part will be in point contact with the outer peripheral surface of an overhead wire in the state which attached the connecting member to the overhead wire. Accordingly, the bird damage prevention device has a smaller contact area with the overhead wire of the connecting member, so that the contact resistance generated between the connecting member and the overhead wire is also reduced, and the attachment position of the connecting member attached to the overhead wire is prevented. It can be easily changed along with the tool body. Therefore, the operator can attach not only the main body of the prevention tool but also the connecting member to the overhead line without changing the work position, and the time and labor spent on the work can be reduced.

  In this case, it is preferable that the connecting member is constituted by a part of the ball on which the ball is rotatably mounted on the inner peripheral surface side and the second overhead wire contact portion protrudes from the inner peripheral surface. If it does in this way, in the state which attached the connecting member to the overhead wire, the 2nd overhead wire contact part comprised by a part of ball will carry out point contact with the outer peripheral surface of an overhead wire. And if it is going to move the connection member attached to the overhead wire, the ball which comprises a 2nd overhead wire contact part will rotate by contact with an overhead wire. Thereby, the bird damage prevention tool of the said structure can reduce the contact resistance of an overhead wire and a connection member, and can move a connection member easily.

  As described above, the bird harm prevention tool of the present invention can achieve an excellent effect that the operator can attach it to the overhead wire without moving the work position.

1 shows an overall schematic diagram of a bird harm prevention tool according to a first embodiment of the present invention. FIG. The longitudinal cross-sectional view of the prevention tool main body in the bird damage prevention tool which concerns on the embodiment is shown. The longitudinal cross-sectional view of the connection member in the bird harm prevention tool which concerns on the embodiment is shown. It is explanatory drawing for demonstrating the operation | work which attaches the bird harm prevention tool which concerns on the same embodiment to an overhead wire, Comprising: (a) shows the state which attaches a prevention tool main body to an overhead wire using an insulating Yatco, (b) is The state which attaches a prevention tool main body and a connection member to an overhead wire using an insulating Yatco is shown. The longitudinal cross-sectional view of the prevention tool main body in the bird damage prevention tool which concerns on other embodiment of this invention is shown. The longitudinal cross-sectional view of the connection member in the bird harm prevention tool which concerns on another embodiment of this invention is shown. The longitudinal cross-sectional view of the prevention tool main body in the bird damage prevention tool which concerns on another embodiment of this invention is shown. The longitudinal cross-sectional view of the prevention tool main body in the bird damage prevention tool which concerns on another embodiment of this invention is shown.

  Hereinafter, a bird harm prevention tool according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, the bird damage prevention apparatus according to the present embodiment includes a prevention body 2 attached to an overhead wire (for example, a power transmission line, an optical cable, etc.) that is installed between utility poles. Moreover, the bird damage prevention tool 1 which concerns on this embodiment is provided with the connection member 3 which connects the prevention tool main bodies 2 together while providing the said prevention tool main bodies 2 with two or more. In addition, the prevention tool main body 2 shown in FIG. 1 is illustrated in a simplified manner. That is, the prevention tool main body 2 in FIG. 1 is shown with only a base (not numbered in FIG. 1) described later, with a protrusion described later omitted.

  As shown in FIG. 2, the prevention device main body 2 includes a base 20 and a protruding portion 21 that protrudes outward from the surface of the base 20. The preventer main body 2 is attached to the overhead wire A by winding the base 20 around the overhead wire A in a spiral shape. On the premise of this, the prevention tool main body 2 is formed with a first overhead wire contact portion 22 that partially protrudes on a surface 200 (hereinafter referred to as an opposing surface) facing the outer periphery of the overhead wire A of the base 20. A plurality of the first overhead wire contact portions 22 are provided at intervals in the longitudinal direction of the base 20. As for the prevention tool main body 2 which concerns on this embodiment, the base 20, the protrusion part 21, and the 1st overhead wire contact part 22 are each comprised by the separate member.

  Here, each configuration of the preventer main body 2 according to the present embodiment will be specifically described. The base 20 is resin-molded, and is formed in a spiral shape with a length in one direction (see FIG. 1). ). The base 20 according to the present embodiment is formed such that the cross section forms a peak at the center of a direction orthogonal to the long direction (hereinafter referred to as the short direction). Specifically, the base 20 includes a pair of inclined portions 201a and 201b that are inclined downward from the center in the short direction toward both ends in the same direction. As a result, the base 20 having the above-described configuration is configured such that the opposing surface 200 or the tips of the inclined portions 201a and 201b facing the overhead line A of the inclined portions 201a and 201b are in line contact with the outer peripheral surface of the overhead wire A.

  In addition, the base 20 is provided with a plurality of through holes 202 for attaching the protruding portions 21 at predetermined intervals in the longitudinal direction. Further, the through hole 202 is provided with a counterbore 203 on the facing surface 200 side. Further, the base 20 is provided with recesses 204... At the center in the short direction of the facing surface 200. The recesses 204 are for accommodating balls 205 described later, and a plurality of the recesses 204 are formed at intervals in the longitudinal direction with respect to the base 20. The recesses 204 are formed so that a part of the accommodated ball 205 protrudes from the facing surface 200.

  And since the bird harm prevention tool 1 which concerns on this embodiment is provided with the connection member 3 as mentioned above, the prevention tool main body 2 is the both ends of the longitudinal direction of the base 20 connected (connection) to the connection member 3. A hook-shaped retaining portion (not shown) is formed in the portion.

  A plurality of the protruding portions 21 are provided at predetermined intervals in the longitudinal direction of the base 20. The protrusion 21 according to the present embodiment is formed in a rod shape. The protruding portion 21 is set to an outer diameter that can be inserted into the through hole 202 in a state where the outer periphery is in pressure contact with the inner peripheral surface of the through hole 202 of the base 20. The protruding portion 21 is for inhibiting the flying bird from stopping on the overhead line A. Therefore, the protrusion 21 is formed of a rigid material or an elastic material so as not to bend easily.

  The protruding portion 21 according to the present embodiment is attached by being inserted from the facing surface 200 side of the through hole 202 provided in the base 20 so as to protrude outward from the surface of the base 20. In order to prevent the protruding portion 21 from falling off the base 20, a flange portion 210 for preventing the protruding from the base 20 is connected to the end portion of the protruding portion 21. That is, the preventer main body 2 according to the present embodiment includes an extending member 211 composed of the protruding portion 21 and the flange portion 210, and by inserting the extending member 211 into the base 20, A protruding portion 21 protruding from the surface is formed. In the present embodiment, since the counterbore 203 is provided on the opposite surface 200 side of the through hole 202, the flange portion 210 is accommodated in the counterbore 203, and only the protruding portion 21 protrudes from the surface of the base 20. The flange portion 210 is formed in a shape such that there is no gap with the counterbore 203 of the base 20 and does not protrude from the counterbore 203. The flange portion 210 is connected so that the protruding portion 21 is concentric with one end face.

  In the preventer main body 2 according to the present embodiment, the first overhead wire contact portion 22 is configured by a part of the ball 205 that is rotatably attached to the facing surface 200 of the base 20. That is, in the preventer main body 2 according to this embodiment, the ball 205 is rotatably fitted in the recesses 204 of the base 20, and a part of the ball 205 protruding from the base 20 is a first overhead wire contact portion. 22 is constituted. The prevention tool main body 2 according to the present embodiment is filled with a lubricant 206 between the base 20 and the ball 205 so that the ball 205 rotates smoothly. Therefore, the depth of the recesses 204 formed in the base 20 is set so that a part of the ball 205 protrudes from the base 20 when the lubricant 205 is filled and the ball 205 is accommodated.

  As shown in FIG. 3, the connecting member 3 is configured to be attachable to the overhead line A in a state of surrounding a part of the overhead line A, and is partially protruded from the inner peripheral surfaces 310 a and 310 b facing the overhead line A. A plurality of overhead wire contact portions 30 are formed at intervals in the circumferential direction.

  Here, the connecting member 3 will be described in detail. The connecting member 3 includes a pair of arcuate bodies 31a and 31b arranged so that the inner peripheral surfaces 310a and 310b face each other as shown in the drawing. And as for the connection member 3 which concerns on this embodiment, as for a pair of circular arc bodies 31a and 31b, the mutual one end parts are connected rotatably via the rotating shaft 32, and the other end parts connect the connection pin 33. Can be connected using. That is, each arcuate body 31a, 31b is provided with connection portions 312a, 312b with connection holes 311a, 311b through which the connection pins 33 can be inserted at the other end portions, and the other end portions are brought close to each other. By inserting the connecting pin 33 into the connecting holes 311a and 311b of the connecting portions 312a and 312b in the state, the other ends are firmly connected.

  Thereby, a pair of circular arc bodies 31a and 31b are comprised so that both may be united and annular | circular shape by making the other end parts approach. That is, the pair of arcuate bodies 31a and 31b surround the overhead line A so as to be sandwiched from both sides. As a result, the pair of arcuate bodies 31 a and 31 b are configured such that the inner peripheral surfaces 310 a and 310 b are opposed to the outer peripheral surface of the overhead line A in a state of being attached to the overhead line A.

  The arcuate bodies 31a and 31b according to the present embodiment have recesses 313 formed on the inner peripheral surfaces 310a and 310b, respectively. The recesses 313 are for accommodating balls 315 to be described later, and a plurality of the recesses 313 are formed at intervals in the circumferential direction. The recesses 313 are formed so that a part of the accommodated ball 315 protrudes from the facing surface 200.

  And each circular arc body 31a, 31b is formed with at least one insertion hole 314... In each of both end faces in the axial direction (direction in which the curvature center line extends). The insertion holes 314 are for inserting both end portions (prevention portions) of the base 20 of the preventer main body 2, and include small-diameter holes 314a that form openings on the end surfaces of the arcuate bodies 31a and 31b, The large-diameter hole 314b is continuous with the small-diameter hole 314a. That is, the insertion holes 314 are formed in a stepped hole shape in which the hole diameter is set larger toward the back side. Thus, the insertion holes 314... Form a step inside, so that when the end portion (prevention portion) of the base 20 is inserted into the insertion holes 314. It is configured to be in a state where it is caught by a step and prevented from coming off. In addition, if a repellent material is injected into the insertion hole 314 that is not used, it becomes difficult for birds to approach the overhead wire A.

  In the connecting member 3 according to the present embodiment, the second overhead wire contact portion 30 is configured by a part of the ball 315 rotatably attached to the inner peripheral surfaces 310a and 310b of the arcuate bodies 31a and 31b. That is, in the connecting member 3 according to the present embodiment, the ball 315 is rotatably fitted in the recesses 313... Of the arcuate bodies 31a and 31b. In the connecting member 3, a part of the ball 315 protruding from the circular arc bodies 31 a and 31 b constitutes the second overhead wire contact portion 30. The connecting member 3 according to the present embodiment is filled with a lubricant 316 between the circular arc bodies 31a and 31b and the ball 315 so that the ball 315 rotates smoothly. Therefore, the recesses 313... Formed in the arcuate bodies 31a and 31b are such that when the ball 315 is accommodated by filling the lubricant 316, a part of the ball 315 is separated from the inner peripheral surfaces 310a and 310b of the arcuate bodies 31a and 31b. The depth is set so as to protrude.

  The connecting pin 33 includes a tip part 330 formed in a truncated cone shape, a shaft part 331 set concentrically to the large diameter side of the tip part 330 and concentrically connected to the large diameter side of the tip part 330; And a frustum-shaped retaining portion 332 that is connected to the shaft portion 331. As a result, the connecting pin 33 is inserted into the connecting holes 311a and 311b of the connecting portions 312a and 312b, and the distal end portion 330 is locked to the opening edges of the connecting holes 311a and 311b in the connecting portions 312a and 312b. The other end portions of the arcuate bodies 31a and 31b are firmly connected to each other.

  The bird harm prevention tool 1 of the present embodiment is as described above. Next, the operation of attaching the bird harm prevention tool 1 to the overhead line A will be described. In the present embodiment, a case where the worker attaches the bird damage prevention tool 1 to the overhead wire A using a hot stick (insulating Yako) will be described as an example.

  As shown to Fig.4 (a), an operator gets on the bucket of an aerial work vehicle and moves to the attachment position of the bird damage prevention tool 1. FIG. And the prevention tool main body 2 is hold | maintained with the insulating Yatco B, and this prevention tool main body 2 is wound around the overhead wire A helically. Then, when the entire length of the bird damage prevention device 1 (prevention device main body 2) is wound around the overhead wire A, the operator pushes the prevention device main body 2 wound around the overhead wire A with the insulating yarn B in the longitudinal direction of the overhead wire A and is attached to the position. To change. At this time, the first main wire contact portion 22 formed on the facing surface 200 of the base 20 is partially in contact with the outer peripheral surface of the overhead wire A, so that the contact resistance with the overhead wire A is small. Even if the operation is performed with the insulating Yatco B, the prevention tool main body 2 can be smoothly slid. In particular, the bird damage prevention device 1 according to the present embodiment is configured by a part of the ball 205 on which the first overhead wire contact portion 22 of the prevention device body 2 is rotatably fitted. When the tool body 2 is moved, the ball 205 is rotated, and the prevention tool body 2 can be easily moved.

  And when attaching another prevention tool main body 2 with respect to the overhead wire A, as shown in FIG.4 (b), as shown in FIG. The stop portion) is inserted into the insertion hole of the connecting member 3 and the overhead line A is surrounded by the pair of arcuate bodies 31a and 31b, or the overhead line A is surrounded by the pair of arcuate bodies 31a and 31b, The end portion (prevention portion) of the base 20 of the prevention device main body 2 is inserted into the insertion hole 314 of the connecting member 3. In addition, after surrounding the overhead line A with the pair of arcuate bodies 31a and 31b, the other end portions (the connecting parts 312a and 312b) of both arcuate bodies are connected by the connecting pin 33, and the connecting member 3 surrounds the overhead line A. Will be maintained in a state.

  And after the edge part of the prevention tool main body 2 (base 20) is connected with the connection member 3, after the edge part of the base 20 of the next prevention tool main body 2 is connected with the connection member 3, this prevention tool main body 2 is spirally wound around the overhead wire A in the same manner as the above-described main body 2 of the prevention device.

  As described above, when the plurality of prevention device main bodies 2 are connected via the connection member 3, it is necessary to change the positions of the prevention device main body 2 and the connection member 3 attached earlier. As described above, since the first overhead wire contact portion 22 formed on the facing surface 200 of the base 20 is partially in contact with the outer peripheral surface of the overhead wire A, the contact resistance with the overhead wire A is small, and the insulation YATCO B is used. Even if it is an operation, the prevention tool main body 2 can be smoothly slid, and also in the connecting member 3, the second overhead wire contact portion 30 is partially in contact with the outer peripheral surface of the overhead wire A. A contact resistance with A is small, and even if it is operation by the insulating Yako B, it can slide smoothly. In particular, since the bird harm prevention tool 1 according to the present embodiment is configured by a part of the ball 315 in which the second overhead wire contact portion 30 of the connecting member 3 is rotatably fitted, as described above, the connecting member Since the ball 315 is rotated when the 3 is moved, the connecting member 3 can be easily moved in the same manner as the prevention tool body 2.

  As described above, the bird damage prevention device 1 according to the present embodiment includes the base 20 that is formed in a spiral shape in the longitudinal direction in one direction, and the protruding portion 21 that protrudes outward from the surface of the base 20. In the bird damage prevention device 1 provided with the prevention device main body 2 having the base 20 spirally wound around the overhead wire A, the prevention device main body 2 is partially on the facing surface 200 of the base 20 facing the overhead wire A. Since a plurality of protruding first overhead wire contact portions 22 are formed at intervals in the longitudinal direction, the contact resistance generated between the base 20 and the overhead wire A is reduced, and the prevention device main body 2 is wound around the overhead wire A. Even in the state, the mounting position can be easily changed by sliding (moving) in the longitudinal direction of the overhead wire A. Therefore, the operator can attach the prevention tool main body 2 to the overhead line A without changing the work position, and can reduce the time and labor spent on the work.

  Moreover, the bird harm prevention tool 1 which concerns on this embodiment is further equipped with the connection member 3 which connects the prevention tool main bodies 2 while providing the said prevention tool main body 2 with two or more, and this connection member 3 is a part of the overhead wire A. A plurality of second overhead wire contact portions 30 that are configured to be attachable to the overhead wire A in an enclosed state and partially protrude from the inner peripheral surfaces 310a and 310b facing the overhead wire A are formed at intervals in the circumferential direction. Therefore, the second overhead wire contact portion 30 is brought into point contact with the outer peripheral surface of the overhead wire A in a state where the connecting member 3 is attached to the overhead wire A. Therefore, the bird damage prevention device 1 also reduces the contact resistance generated between the connecting member 3 and the overhead wire A, and easily changes the attachment position of the connecting member 3 attached to the overhead wire A together with the prevention device main body 2. be able to. Therefore, the operator can attach not only the prevention tool main body 2 but also the connecting member 3 to the overhead line A without changing the work position, and can reduce the time and labor required for the work.

  Further, the preventer main body 2 is constituted by a part of the ball 205 in which a rotatable ball 205 is mounted on the facing surface 200 side of the base 20 and the first overhead wire contact portion 22 protrudes from the facing surface 200. Therefore, when the preventer main body 2 attached to the overhead line A is to be moved, the ball 205 constituting the first overhead line contact portion 22 rotates in contact with the overhead line A. Thereby, the bird damage prevention tool 1 of the said structure can reduce the contact resistance of the overhead wire A and the prevention tool main body 2, and can move the prevention tool main body 2 wound around the overhead wire A easily. In particular, in this embodiment, since the lubricant 206 is filled between the ball 205 and the base 20, the ball 205 rotates more smoothly, so that the contact resistance between the overhead wire A and the prevention device main body 2 is further increased. Can be reduced.

  In addition, since the connecting member 3 is provided with a rotatable ball 315 on the inner peripheral surface side, and the second overhead wire contact portion 30 is constituted by a part of the ball 315 protruding from the inner peripheral surfaces 31a and 31b. When the connecting member 3 attached to the overhead wire A is moved, the ball 315 constituting the second overhead wire contact portion 30 is rotated by contact with the overhead wire A. Thereby, the bird damage prevention tool 1 of the said structure can reduce the contact resistance of the overhead wire A and the connection member 3, and can move the connection member 3 easily.

  Therefore, the bird damage prevention tool 1 according to the present embodiment can have an excellent effect that the bird damage prevention tool 1 can be attached to the overhead wire A without the operator moving the work position.

  In addition, the bird harm prevention tool of this invention is not limited to the said embodiment, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

  In the above embodiment, the ball 205 is rotatably fitted to the facing surface 200 side of the base 20 of the prevention tool main body 2, and the first overhead wire contact portion 22 is configured by a part of the ball 205. However, the present invention is not limited to this. For example, as shown in FIG. 5, the first overhead wire contact portion 22 may be integrally formed with the base 20 having the same form as the above embodiment. That is, the first overhead wire is formed by partially projecting (raising) the facing surface 200 of the base 20 including a pair of inclined portions 201a and 201b inclined downward from the center in the short direction toward both ends in the same direction. The contact portion 22 may be used. Even if it does in this way, the 1st overhead wire contact part 22 will be in point contact with the overhead wire A, and the contact resistance with respect to the overhead wire A becomes small. Therefore, similarly to the above-described embodiment, the preventer main body 2 can be easily moved in a state of being attached to the overhead wire A. Even in this case, it goes without saying that a plurality of the first overhead wire contact portions 22 are formed at intervals in the longitudinal direction with respect to the base 20.

  In the above embodiment, the protruding portion 21 (extending member 211) is inserted into the base 20 so that the protruding portion 21 protrudes from the base 20. However, the present invention is not limited to this. The part 21 may be molded integrally. Further, the protruding portion 21 is not limited to the one formed in the shape of a rod. For example, as shown in FIGS. 6 and 7, the protruding portion 21 is connected to the surface (surface facing outward) of the base 20 and faces the tip. You may form so that the width | variety of a transversal direction may become narrow. That is, the protrusion 21 may be formed in a shape (triangular cross-section) that is connected over the entire region of the base 20 in the short direction and sharpens from both ends of the base 20 in the short direction toward the tip. .

  Even when the protruding portion 21 is formed in this way, as shown in FIG. 6, the base 20 including a pair of inclined portions 201 a and 201 b that are inclined downward from the center in the short direction toward both ends in the same direction. A ball 205 is rotatably fitted to the opposite surface 200 side to form the first overhead wire contact portion 22 with a part of the ball 205, or both ends in the same direction from the center in the short direction as shown in FIG. The first overhead wire contact portion 22 is formed by projecting a part of the facing surface 200 of the base 20 having a pair of inclined portions 201a and 201b inclined forward and downward, so that the contact resistance with respect to the overhead wire A is reduced. Can be small.

  In the above-described embodiment, the plurality of protrusions 21 are intermittently arranged at intervals in the longitudinal direction of the base 20. However, the present invention is not limited to this. You may make it form continuously in a direction. In this case, the protrusion 21 shown in FIG. 6 or the piece-like protrusion 21 extending from the surface of the base 20 along the longitudinal direction of the base 20 may be used. Moreover, when arrange | positioning the protrusion part 21 intermittently, the protrusion part 21 is not limited to a rod-shaped thing, The cone shape and the pyramid shape which tapered toward the front-end | tip may be sufficient.

  In the above embodiment, the ball 315 is rotatably fitted to the inner peripheral surfaces 310a and 310b of the connecting member 3 (arc bodies 31a and 31b), and the second overhead wire contact portion 30 is configured by a part of the ball 315. However, the present invention is not limited to this. For example, as shown in FIG. 8, the inner peripheral surfaces 310a and 310b of the connecting member 3 (arc bodies 31a and 31b) are partially projected to contact the second overhead line. The unit 30 may be used. As described above, when the arcuate bodies 31a and 31b and the second overhead wire contact part 30 are integrally formed, the second overhead wire contact part 30 may be integrally formed at the stage of manufacturing the arcuate bodies 31a and 31b. The second overhead wire contact portion 30 which is a separate member with respect to the circular arc bodies 31a and 31b may be integrally fixed by an adhesive or welding.

  In the above-described embodiment, one end portions of the pair of arcuate bodies 31a and 31b are pivoted and the other end portions of the arcuate bodies 31a and 31b are coupled by the coupling pin 33. However, the present invention is not limited thereto. If it can attach in the state which surrounded the overhead wire A instead, the form of the connection member 3 (arc body 31a, 31b) can be changed suitably.

  Furthermore, in the said embodiment, although the 2nd overhead wire contact part 30 was provided on the assumption that the inner peripheral surfaces 310a and 310b of the connection member 3 approached the outer peripheral surface of the overhead wire A, regarding the connection member 3, a prevention tool main body. 2 is not an aspect in which the tightening action is generated with respect to the overhead wire A (not spirally wound). For example, the inner diameter when the pair of arcuate bodies 31a and 31b are formed into an annular shape is the outer diameter of the overhead wire A. You may set larger than. In this way, since the resistance between the connecting member 3 and the overhead wire A is reduced when the overhead wire A is surrounded, the attachment position of the connecting member 3 attached to the overhead wire A can be determined without providing the second overhead wire contact portion 30. It can be changed easily.

  In the said embodiment, although the thing like the protrusion part 21 of the prevention tool main body 2 was not provided in the outer periphery of the connection member 3 (arc body 31a, 31b), it is not limited to this, For example, connection You may make it provide the protrusion part which prevents the flying of a bird on the outer surface of the member 3 (it obstructs).

  In the said embodiment, although the bird damage prevention tool 1 was comprised by the connection member 3 which connects the prevention tool main bodies 2 and the prevention tool main bodies 2 mutually, it is not limited to this, For example, the prevention tool main body 2 May be formed in a long shape, and the bird damage prevention tool 1 may be constituted by the prevention tool main body 2 alone. In this way, when the prevention tool body 2 is wound around the overhead line A, it is necessary to send the prevention body 2 in the longitudinal direction of the overhead line A one after another. Since the first overhead wire contact portion 22 is provided, the protective device main body 2 can be smoothly moved in the longitudinal direction of the overhead wire A even if it is formed long.

  DESCRIPTION OF SYMBOLS 1 ... Bird damage prevention tool, 2 ... Prevention tool main body, 3 ... Connection member, 20 ... Base, 21 ... Projection part, 22 ... First overhead wire contact part, 30 ... Second overhead wire contact part, 31a, 31b ... Arc body, 32 ... Rotating shaft 33 ... Connecting pin, 200 ... Opposing surface, 201a, 201b ... Inclined part, 202 ... Through hole, 203 ... Counterbore, 204 ... Recess, 205 ... Ball, 206 ... Lubricant, 210 ... Flange part, 211 ... Extension Outlet member, 310a, 310b ... inner peripheral surface, 311a, 311b ... connecting hole, 312a, 312b ... connecting part, 313 ... recessed part, 314 ... insertion hole, 314a ... small diameter hole, 314b ... large diameter hole, 315 ... ball, 316 ... Lubricant, 330 ... Tip, 331 ... Shaft, 332 ... Retaining part, A ... Overhead wire, B ... Insulating yarn

Claims (4)

A bird having a base formed in a spiral shape with a length in one direction, and a preventer body having a protrusion protruding outward from the surface of the base, the base being spirally wound around an overhead wire In the harm prevention tool, the base includes a pair of inclined portions that are formed in a mountain having an apex at the center in the short direction perpendicular to the longitudinal direction, and are inclined downward toward both ends in the short direction, The inclined part is formed so that the opposing surface facing the overhead line is a concave curved surface, and the tip of the inclined part is in line contact with the outer peripheral surface of the overhead line. A bird injury prevention tool characterized in that a plurality of first overhead wire contact portions projecting and making point contact with the overhead wire are formed at intervals in the longitudinal direction.
  2. The bird harm prevention according to claim 1, wherein the prevention tool main body is configured such that a ball is rotatably mounted on the facing surface side of the base, and the first overhead wire contact portion is configured by a part of the ball protruding from the facing surface. Ingredients.   A plurality of the prevention device main bodies and a connection member for connecting the prevention device main bodies to each other are further provided, and the connection member is configured to be attachable to the overhead wire in a state of surrounding a part of the overhead wire, and is opposed to the overhead wire. The bird damage prevention tool according to claim 1 or 2, wherein a plurality of second overhead wire contact portions partially projecting at a distance are formed at intervals in the circumferential direction.   The bird damage prevention device according to claim 3, wherein the connecting member is configured such that a ball is rotatably mounted on an inner peripheral surface side, and a second overhead wire contact portion is configured by a part of the ball protruding from the inner peripheral surface. .

Images