JP2010022173A - Device for supporting overhead wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for supporting an overhead wire, which supports an overhead wire with high working efficiency at positions where the overhead wires such as wires arranged paralleled in a horizontal direction and a perpendicular direction are branched, and at positions where the directions of the overhead wires are changed. <P>SOLUTION: The device for supporting the overhead wire is provided with an insulator 20 in which a through-hole 21 is formed in the center axis, and hanger parts 42, 51a, 52a, 53a of anchoring tools 40, 51, 52, 53, and an annular groove 22 retaining the overhead wire 3, are formed on a circumferential surface, and a center shaft 10 inserted into the through-hole 21 of the insulator 20. The center shaft 10 has a length to cross a plurality of overhead wires 2, 3 arranged in parallel. The insulator 20 is arranged so as to align with a position of each overhead wire 2, 3. Both end surfaces of the insulator 20 are held between fixing members 30 externally fitted to the center shaft 10. A screw 11 is formed across the whole length, or only at the part where each insulator 20 is arranged, on the external periphery of the center shaft 10. The fixing member 30 is an intermediate portion insertion nut, which is composed of openable half split members. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an overhead wire support used for branching an overhead wire such as an electric wire spanned between utility poles or changing the direction of the overhead wire. Specifically, a plurality of overhead wires arranged in parallel are fixed. It is related with the support tool of the overhead wire provided with the some insulator for maintaining and maintaining the space | interval of.

  At the intersection of roads, as shown in FIG. 15, the electric wires 2, 2, 2 installed between the utility poles 1, 1 branch into a T shape, or the direction of the overhead line is changed into an L shape (not shown). There are places. In such a place, the electric wires 2, 2, and 2 are supported by the overhead wire support. For example, Patent Document 1 discloses an aerial branch structure of a distribution line, an aerial branch method, and a branch insulator using an inter-post messenger wire 3 stretched below the electric wires 2, 2 and 2 between the utility poles 1 and 1. Is disclosed.

  The aerial branch structure of a distribution line disclosed in Patent Document 1 is for branching three branch lines 2a, 2a, 2a branched from three main lines (electric wires) 2, 2, 2 arranged in parallel in the horizontal direction. It is supported by the insulator 100. As shown in FIG. 16, the branching insulator 100 is made of a tubular FRP core material 101 in which an insertion hole of the messenger wire 3 is formed in the axial direction, and a rubber material coated on the outer periphery of the core material 101. The outer cover material 102 and a plurality of resin ring members 103 that are externally fitted to the outer cover material 102 at a predetermined interval are configured.

  An annular recess for supporting the winding grip 111 of the support member 110 is formed on the outer peripheral surface of the ring member 103. The support member 110 includes a main body portion that incorporates a connector (not shown) that connects the branch line 2 a and the connection line 2 b, and a loop-shaped winding grip 111 that is hung on the ring member 103. In such an aerial branch structure of a distribution line, the messenger wire 3 is inserted into the insertion hole of the branching insulator 100, whereby the number of parts can be reduced and the weight can be reduced.

  Patent Document 2 discloses a spacer for electric wires (corresponding to the branching insulator 100 in Patent Document 1) provided with connecting portions for attaching messenger wires at both ends of a core material made of FRP.

JP 2004-266916 A JP 2003-32863 A

  As described in the background art, the electric wires installed between the utility poles are arranged in parallel in the horizontal direction as described in the background art, but in the case of low pressure, the electric wires are arranged in the vertical (vertical) direction. A conventional overhead wire support for supporting an electric wire in a vertical direction includes a plurality of insulators formed with a through hole as a central axis and an annular groove on the outer peripheral surface for hooking the electric wire, and through holes of each insulator And a bolt that penetrates through. The bolt is about 70 cm long and can support only four wires at most. However, the overhead wire supporter supporting the four electric wires has a weight, so that it is bent and may contact an inter-post messenger wire or a communication cable stretched below the electric wires.

  Further, the overhead wire support disclosed in the cited documents 1 and 2 (branch insulator 100, electric wire spacer) is made of FRP and lighter in weight, but from the electric wires arranged in parallel in the horizontal direction. It supports the branched branch line 2a and does not have a structure for branching an electric wire installed in a vertical direction or changing the direction of the electric wire 2 between the utility poles 1 and 1.

  Furthermore, since the aerial branching structure of the distribution line disclosed in Patent Document 1 is such that the inter-post messenger wire 3 is inserted into the insertion hole formed in the core member 101, the inter-post messenger wire 3 is already in the power pole 1. , 1, the inter-post messenger wire 3 must be once lowered to the ground, and the workability cannot be said to be good.

  Therefore, the present invention is not limited to the horizontal direction, it is an overhead wire that can support the overhead wire with good workability at the location where the wires paralleled in the vertical direction, other locations where the overhead wire branches, or where the overhead wire direction is changed. It is an object of the present invention to provide a support tool.

  The overhead wire support according to the present invention includes a plurality of insulators formed on the peripheral surface with a hanger portion of the retainer and an annular groove for hooking the overhead wire, and a through hole of the plurality of insulators. An overhead wire support provided with a middle shaft inserted therein, wherein the middle shaft is formed to have a length extending between a plurality of parallel overhead wires, and the lever matches the position of each overhead wire The both end surfaces of each insulator are sandwiched between fixing members that externally fit the center shaft.

  According to this overhead wire support, the overhead wire is formed by arranging, for example, four electric wires and one inter-pillar messenger wire in parallel because the central shaft is formed in a length extending between a plurality of overhead wires. Even if there is a case, the middle shaft is formed to have a length extending over five overhead wires, each insulator is arranged to coincide with the position of each overhead wire, and both end surfaces of each insulator are sandwiched between fixing members that fit the middle shaft. Therefore, the hanger part and the overhead wire of the retainer can be hooked in the annular groove of each insulator.

  Further, in the overhead wire support according to the present invention, a screw is formed on the outer peripheral surface of the central shaft over the entire length or only in a portion where each insulator is disposed, and the half-cracked part that opens and closes the fixing member is provided. It is preferable to be a combined intermediate part insertion nut.

  According to the support for the overhead wire, the intermediate portion insertion nut can be screwed onto the screw formed on the outer peripheral surface of the central shaft, so that each insulator can be easily and reliably fixed at a predetermined position. In addition, when a screw is formed over the entire length of the central shaft, for example, when fixing five insulators to one central shaft or when fixing four insulators, the respective insulators can be arranged at equal intervals. it can. On the other hand, if a screw is formed on the central shaft only at a portion where each insulator is disposed, each insulator can be easily disposed at a predetermined position.

  In the overhead wire support according to the present invention, the insulator is preferably a multi-groove insulator in which a plurality of annular grooves are formed in the length direction.

  According to this overhead wire support, by using a multi-groove insulator as an insulator, the hanger part of the retainer and the overhead wire can be respectively hooked in the respective annular grooves, or are installed in different directions. The hanger part of the fastener holding the overhead wire can be hooked in each annular groove.

  In addition, the overhead wire includes a plurality of electric wires arranged in parallel in the vertical direction between the power poles, and an inter-post messenger wire stretched between the power poles below the lowermost electric wire, and the electric wires are branched between the power poles. An overhead wire support device according to the present invention, wherein the middle shaft is disposed at a position where the middle shaft is branched in the vertical posture, and a messenger between columns is held in an annular groove of the lowermost insulator. It is preferable that the hanger part and the overhead wire of the retainer which hold | maintained the electric wire in the annular groove of insulators other than the lowest are hooked.

  According to this supporter for the overhead wire, the lowermost insulator hooks the hanger part of the retainer holding the inter-post messenger wire, and each retainer other than the lowermost insulator holds each wire. The gap between the lowermost electric wire and the messenger wire is kept constant, and the lowermost electric wire bends to contact the messenger wire, or each electric wire vibrates and contacts each other. Can be avoided. In addition, the hanger part of each electric wire and each retainer is hooked on the insulator, this insulator is fixed to the center shaft, and the bottom insulator fixed to the center shaft holds the inter-post messenger wire. As a result, the electric wires are supported by the inter-post messenger wires via the overhead wire support.

  Further, the overhead line is composed of an electric wire that changes the direction of the overhead line in the middle of the span from one utility pole to the other utility pole, and a one-side messenger wire that is stretched to the other utility pole from the location where the overhead line direction is changed. An overhead wire support device according to the present invention for supporting an overhead wire at a direction change location, wherein the central shaft is arranged in the overhead wire direction change location in a vertical posture, and faces each direction in an annular groove of each insulator The grip portion of each of the holding devices that respectively hold the electric wires is hooked, and the grip of the holding device that holds one end portion of the one-side messenger wire is hooked in the annular groove of any two insulators. Is preferred.

  According to this overhead wire support, the central axis is arranged in a vertical position at the change point in the overhead wire direction, the retainer holds the electric wires facing each direction, and the hanger part of each retainer is an insulator ring. Locked in the groove, another two fasteners hold one end of one side messenger wire, and the hanger part of the two fasteners is hooked on any two insulators, The overhead wire direction of the electric wire can be changed in the middle of the span.

  According to the present invention, there is provided an overhead wire support in which a lever is arranged on a support column having a length over a plurality of overhead wires so as to coincide with each overhead wire, and the insulator is fixed at a predetermined position by a fixing member. Therefore, it is possible to improve the workability of hooking a support for the overhead wire on a plurality of overhead wires arranged in parallel.

  An embodiment of an overhead wire support according to the present invention will be described with reference to FIGS. As shown in FIG. 1, the overhead wire support includes a central shaft 10 having a length extending between a plurality of parallel overhead wires 2, 3, and 4, and a plurality of levers 20 that hook the overhead wires 2, 3, and 4. , 20,... And a fixing member 30 as shown in FIG. 2 for fixing the insulator 20 to the center shaft 10, and separately, two general types of pulls for holding overhead wires as shown in FIGS. Fasteners 40 and 50 are used.

  As shown in FIG. 5, the overhead wires 2, 3, 4 are four electric wires 2, 2,... As shown in FIG. 6, the concept includes an intermediate messenger wire 3 and a one-side messenger wire 4 stretched between a portion where the overhead line direction is changed and the utility pole 1. It may not be included. In any case, the electric wires 2, 2,... Are branched between the utility poles 1, 1 as shown in FIG. 5 (vertical halfway branch) and between the utility poles 1, 1 as shown in FIG. There is a case where the direction of the overhead line is changed (support in the middle of span).

  The intermediate shaft 10 constituting the overhead wire support for supporting the overhead wires 2, 3, and 4 is made of a pipe-shaped aluminum alloy as shown in FIG. Formed. However, the middle shaft 10 may be formed of FRP or the like as long as it can achieve rust prevention and weight reduction. Further, the intermediate shaft 10 formed in the pipe can be inserted through the inter-post messenger wire 3. In addition, when not inserting the messenger wire 3 between pillars, the center axis | shaft 10 formed with the material which can achieve weight reduction is good also as a solid.

  In any case, a screw 11 is formed on the center shaft 10. As shown in FIG. 1, the screw 11 may be formed only at a predetermined place where the insulator 20 is disposed, or may be formed over the entire length although not shown. When the screw 11 is formed only at the place where the insulator 20 is disposed, the position where the insulator 20 is disposed is clarified, but the insulator 20 is manufactured separately for the case where the insulator 20 is disposed at five places and the case where the insulator 20 is disposed at four places. There must be. On the other hand, when the screw 11 is formed in the full length, although it can be used regardless of the number of the insulators 20 to be arranged, it is preferable to attach a mark for arranging the insulators 20 at equal intervals.

  The insulator 20 is formed with a through hole 21 through which the central shaft 10 penetrates as a central axis, and an annular groove 22 that locks the hanger portions 42, 51a, 52a of the fasteners 40, 50 on the peripheral surface. As shown in FIG. 1 (b), a multi-groove insulator (hereinafter also referred to as “two-line insulator”) 20A in which two annular grooves 22 and 22 are formed in the length direction, and FIG. 1 (c). As shown, a multi-groove insulator (hereinafter also referred to as “three-line insulator”) 20B in which three annular grooves 22, 22, 22 are formed in the length direction is used. The three-wire insulator 20B is formed with three annular grooves 22, 22, 22 so that the messenger wires 3, 4 can be accommodated even if they are stretched in a T shape, an L shape, or a cross shape. ing.

  Each width | variety of the annular groove 22 of 20 A of insulators for 2 wires is formed in the magnitude | size which the hanger part 42 of the securing tool 40 holding the electric wire 2 and the electric wire 2 enters at least. Moreover, the annular groove 22 of the insulator 20B for 3 wires is formed in the size which the hanger parts 51a and 52a of the clasp 51 and 52 holding the messenger wires 3 and 4 enter.

  And as the fixing member 30, as shown to Fig.2 (a) (b), the intermediate part insertion nut 30 which consists of the parts 31 and 32 of the half crack which opens and closes is used.

  2A includes two parts 31 and 31 that are divided in the longitudinal direction and whose both end portions are overlapped, and a pin 31a that pivotally supports one end of the parts 31 and 31. Concave and convex portions 31b and 31b are provided at the other end of the part 31, and the female screw 31c is provided at the center when the parts 31 and 31 are closed. The intermediate portion insertion nut 30 holds the screw 11 of the middle shaft 10 in a state where the parts 31 and 31 are open, and maintains the closed state by engaging the concave and convex portions 31b and 31b by closing, and the female screw 31c is maintained in the middle shaft. 10 screws 11 are screwed together.

  The intermediate portion insertion nut 30 shown in FIG. 2 (b) is composed of two parts 32, 32 that are halved in the lateral direction, and a part of each part 32, 32 has a notch having the same width as the diameter of the central shaft 10. When the parts 32a and 32a are provided, an annular dovetail groove 32b is formed on one surface where the parts 32 and 32 are overlapped, and an annular protrusion 32c fitted into the dovetail groove is formed on the other surface. The parts 32 and 32 are overlapped and rotated, and a female screw 32d is provided at the center in a state where the notches 32a and 32a do not overlap. This intermediate part insertion nut 30 is formed by sandwiching the screw 11 of the middle shaft 10 with the notches 32a and 32a being continuous and rotating one part 32 so that the notches 32a and 32a do not overlap each other. The female screw 32d is screwed with the screw 11 of the middle shaft 10.

  And as for the securing tools 40 and 50, two types, what hold | maintains the electric wire 2 and what hold | maintains the messenger wires 3 and 4, are used. The retainer 40 for holding the electric wire 2 is generally used as shown in FIG. 3, and includes a main body portion 41 that holds the electric wire 2 in a sandwiched state, and a hanger portion attached to the main body portion 41 in a loop shape. 42.

  In addition, three types 51, 52, and 53 are used as the retainer 50 that holds the messenger wires 3 and 4. As shown in FIG. 4 (a), the first type of clasp 51 is provided with a hanger portion 51a hooked on the annular groove 22 of the three-wire insulator 20B at the center, and both end portions 51b and 51b. It is formed in a spiral shape, and both ends 51b and 51b are entangled with the ends of the messenger wires 3 and 4 in a loop shape.

  Further, as shown in FIG. 4 (b), the second type of clasp 52 has a U-shaped hanger portion 52a that is hooked halfway around the annular groove 22 of the 3-wire insulator 20B. 52 b and 52 b are linearly extended and formed in a spiral shape, and both end portions 52 b and 52 b are entangled with the inter-post messenger wire 3. And as shown in FIG.4 (c), the 3rd type fastener 53 has a pair of hanger parts 53a hooked on each edge part of the insulator 20, and the edge part of the one side messenger wire 4 hooked. And a thimble 53b to be stopped. These retainers 51, 52, 53 are selected according to the use situation.

  Here, an example of using such an overhead wire support will be described. Here, the central shaft 10 in which the screw 11 is partially formed is used.

  First, as shown in FIG. 5, the case where the overhead wires are the electric wires 2, 2,... And the inter-pillar messenger wire 3 are arranged in parallel in the vertical direction and branched vertically.

  As shown in FIG. 7, the support for the overhead wire when the four electric wires 2, 2,... Are stretched uses the central shaft 10 in which screws 11 are formed at five locations. Further, as shown in FIG. 8, as the overhead wire support when three electric wires 2, 2, 3 are stretched, a central shaft 10 in which screws 11 are formed at four locations is used.

  In either case, the three-wire insulator 20B is disposed on the portion of the screw 11 formed at the lowermost portion of the middle shaft 10, and the two-wire insulator 20A is disposed on the portion of the screw 11 formed on the middle portion and the upper portion of the middle shaft 10. The both end surfaces of each insulator 20B, 20A are sandwiched between the fixing members 30, 30, and each insulator 20A, 20B is fixed at a predetermined position.

  Then, the hanger portions 51a and 51a of the two fasteners 51 and 51 shown in FIG. 4A are hooked in the opposite directions in the two annular grooves 22 and 22 of the bottom three-wire insulator 20B. By doing so, the inter-post messenger wire 3 is stretched. Further, the hanger portion 42 of the fastener 40 shown in FIG. 3 is hooked on one annular groove 22 of the other two-wire insulator 20A, and the electric wire 2 is hooked on the other annular groove 22. .

  In addition, when the inter-post messenger wire 3 is not stretched, in order to branch the four electric wires 2, 2,... Halfway, as shown in FIG. The two-wire insulator 20A is fixed to each. Then, when the inter-post messenger wire 3 is not stretched, in order to branch the three electric wires 2, 2, and 2 in the middle, as shown in FIG. 10, a middle shaft 10 having screws 11 formed at five locations is used. The two-wire insulator 20A is fixed to the screws 11 at the three ends at both ends and the center.

  When the inter-post messenger wire 3 is not stretched, the hanger portion 42 of the retainer 40 shown in FIG. The electric wire 2 is hooked on.

  Next, as shown in FIG. 6, electric wires 2, 2,... And an inter-post messenger wire 3 are juxtaposed in the vertical direction between the electric poles 1, 1, and the electric wires 1, 2,. , 1 is supported in the middle of the span and the direction of the overhead wire is changed.

  As shown in FIG. 11, the overhead wire support in the case where four electric wires 2, 2,... Are stretched uses a central shaft 10 in which screws 11 are formed at five locations. Further, as shown in FIG. 12, the support for the overhead wire when the three electric wires 2, 2,... Are stretched uses the central shaft 10 in which screws 11 are formed at four locations.

  In either case, the three-wire insulator 20B is disposed on the portion of the screw 11 formed at the lowermost portion of the middle shaft 10, and the two-wire insulator 20A is disposed on the portion of the screw 11 formed on the middle portion and the upper portion of the middle shaft 10. The both end surfaces of each insulator 20B, 20A are sandwiched between the fixing members 30, 30, and each insulator 20B, 20A is fixed at a predetermined position.

  And the hanger part 51a of the clasp 51 shown to Fig.4 (a) is latched by the cyclic | annular groove | channel 22 of the insulator 20B for the lowest 3 wires. Further, the hanger portion 42 of the fastener 40 shown in FIG. 3 is hooked on one annular groove 22 of the other two-wire insulator 20A, and the electric wire 2 is hooked on the other annular groove 22. . Furthermore, the hanger part 53a of the fastener 53 shown in FIG. 4C is hooked to the lowermost and uppermost two-wire insulator 20A, and the end of the one-side messenger wire 4 is the thimble of the fastener 53. The one side messenger wire 4 is stretched by being hooked on 53b.

  And in the case where the inter-pillar messenger wire 3 is not stretched, in order to support the four wires 2, 2,... In the middle of the span, as shown in FIG. The two-wire insulator 20A is fixed to each. Further, when the inter-post messenger wire 3 is not stretched, in order to support the three electric wires 2, 2,... In the middle of the span, as shown in FIG. The two-wire insulator 20A is fixed to the screws 11 at both ends and at the center. In both cases, the hanger portion 53a of the clasp 53 shown in FIG. 4C is hooked in the annular groove 22 of the two-wire insulator 20A at the lower end and the upper end, and the one-side messenger wire 4 is stretched.

  As described above, in the support for the overhead wire, the insulator 20 is fixed to the center shaft 10 at a predetermined interval, and the electric wires 2, 2,... And the messenger wires 3, 4 (when stretched) Hanger portions 43, 51a, 52a of the retainers 40, 50 that hold only the wire), and the electric wires 2, 2, ... and the inter-post messenger wire 3 maintain a predetermined distance and do not contact each other. Can be.

  In addition, this invention can be variously changed without being limited to the said embodiment. For example, when the inter-post messenger wire 3 is supported by the retaining member 52 as shown in FIG. 4B, a two-wire insulator 20A may be used.

  Further, the overhead wire support can be used even when the electric wires 2, 2,... Parallel in the horizontal direction as described in the background art are branched. In this case, when using the middle shaft 10 formed in a pipe shape, the inter-pillar messenger wire 3 is inserted into the middle shaft 10 and both ends of the middle shaft 10 are fixed to the inter-pillar messenger wire 3 by connectors (not shown). Alternatively, when the solid middle shaft 10 is used, connectors (not shown) are provided at both ends of the middle shaft 10, and both ends of the inter-column messenger wire 3 from which the connector is divided are fixed.

  In addition, it is preferable to use the insulator 20 in which the annular groove 22 is formed so that the hanger portion 42 of the retaining device 40 to be supported does not interfere. The insulator 20 formed only with the annular groove 22 may be used.

  Further, the fixing member 30 may be replaced with an intermediate portion insertion nut, and a small hole may be formed at a predetermined position of the middle shaft 10, and the insulator 20 may be fixed by a pin inserted into the small hole.

It is one Embodiment of the support tool of the overhead wire which concerns on this invention, Comprising: (a) is a front view of the center shaft which is a component, (b) is a front view of the insulator which is a component, (c) is a component. It is a front view of another insulator. It is a fixing member which constitutes the support tool of an overhead wire concerning the present invention, and (a) is a perspective view showing a 1st embodiment, and (b) is a perspective view showing a 2nd embodiment. It is an example of the securing tool used in the support tool of the overhead wire which concerns on this invention, Comprising: (a) is a front view, (b) is a top view. It is a different example of the securing tool used in the support tool of the overhead wire which concerns on this invention, Comprising: (a) is a top view, (b) is a top view, (c) It is a front view. It is the schematic which shows the state which branched the electric wire which uses the support tool of the overhead wire which concerns on this invention to what is called a vertical middle. It is the schematic which shows the state which supported the electric wire which uses the support tool of the overhead wire which concerns on this invention on the way of what is called span. It is a front view which shows the usage example of the support tool of the overhead wire which concerns on this invention. It is a front view which shows the usage example different from the above of the support tool of the overhead wire which concerns on this invention. It is a front view which shows the usage example different from the above of the support tool of the overhead wire which concerns on this invention. It is a front view which shows the usage example different from the above of the support tool of the overhead wire which concerns on this invention. It is a front view which shows the usage example different from the above of the support tool of the overhead wire which concerns on this invention. It is a front view which shows the usage example different from the above of the support tool of the overhead wire which concerns on this invention. It is a front view which shows the usage example different from the above of the support tool of the overhead wire which concerns on this invention. It is a front view which shows the usage example different from the above of the support tool of the overhead wire which concerns on this invention. It is the schematic which shows the state which branched the electric wire so-called horizontal halfway. It is a front view which shows an example of the insulator for branching of the conventional distribution line (supporting tool of an overhead wire).

Explanation of symbols

2 ... Overhead wire (electric wire)
3 ... Overhead (messenger wire between pillars)
4 ..... overhead wire (one side messenger wire)
10 …… Middle shaft 11 …… Screw 20 …… Insulator 21 …… Through hole 22 …… Annular groove 30 …… Fixing member (intermediate part insertion nut)
31 …… Part 32 …… Part 40 …… Retaining tool 42 …… Hanger part 50 …… Holding tool 51 …… Holding tool 51a… Hanger part 52 …… Holding tool 52a… Hanger part 53 …… Retaining Tool 53a ... Hanger part

Claims (5)

A plurality of insulators formed on the peripheral surface with a through hole formed in the central axis and an annular groove for hooking the hanger part of the retainer and the overhead wire, and a central shaft inserted into the through holes of the plurality of insulators are provided. An overhead wire support,
The intermediate shaft is formed in a length extending between a plurality of parallel overhead wires, the insulators are arranged so as to coincide with the positions of the overhead wires, and both end surfaces of the respective insulators are fitted around the intermediate shaft. An overhead wire support characterized by being sandwiched between two.   A screw is formed on the outer peripheral surface of the central shaft over the entire length or only in a portion where each insulator is disposed, and is an intermediate portion insertion nut that combines a half-cracked part that opens and closes the fixing member. The overhead wire support according to claim 1.   The overhead wire support according to claim 1 or 2, wherein the insulator is a multi-groove insulator in which a plurality of annular grooves are formed in a length direction. The overhead line is composed of a plurality of electric wires arranged in parallel in the vertical direction between the utility poles, and an inter-post messenger wire stretched between the utility poles below the lowermost electrical wire, and for branching the electric wires halfway between the utility poles The overhead wire support according to any one of claims 1 to 3,
The middle shaft is placed at a position where the middle shaft is branched in the vertical posture, and the hanger part of the retainer holding the inter-pillar messenger is hooked on the annular groove of the bottom insulator, and the annular groove of the insulator other than the bottom 4. The overhead wire support according to claim 1, wherein a hanger portion and an overhead wire of a retaining device that holds an electric wire are hooked on the wire. The overhead line is composed of an electric wire that changes the direction of the overhead line in the middle of the span from one utility pole to the other utility pole, and a one-side messenger wire that is stretched on the other utility pole from the location where the overhead line direction is changed. The overhead wire support tool according to any one of claims 1 to 3, for supporting the overhead wire at a changed place,
The middle shaft is arranged in a vertical position at a change point in the overhead line direction, and a grip portion of each holding tool holding an electric wire facing each direction is hooked in an annular groove of each lever, and any two levers An overhead wire support, wherein a grip of a retainer holding one end of the one-side messenger wire is hooked on the annular groove.

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