JP2008199742A - Bird damage preventing cover for strain insulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bird damage for preventing cover for strain insulator, so that a metallic long object will not be inserted into a gap between a clamp cover and the strain insulator, and for preventing a short-circuit accident which occurs by a bird is previously prevented. <P>SOLUTION: The cover is provided with the short cylindrical cover body 1 which is formed of a non-conductive material, such as, a synthetic resin material and synthetic rubber, which has an outer diameter over a plurality of concentric circular projections h1 and h2 formed on a face confronted with a restraining clamp T, which is one side end face of the strain insulator H, in which both end faces in a center axial direction are opened and a lower end part is separated 2 along a line parallel to a center axial line; a circular flange part 4 which is peripherally, disposed on an inner peripheral face of the cover body 1 and in which notches 5, extending to an external side from an inner end edge are formed; a pair of coupling piece parts 6a and 6b, extending downward from both sides of a separation part 2 at the lower end part of the cover body 1; and an engagement part 7 and a non-engagement part 8, which are installed in both coupling piece parts 6a and 6b and are engaged so that they are freely detachable. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a short circuit accident that occurs when a bird inserts a rod-shaped object such as a metal wire into a gap between a tension insulator disposed on the upper part of a utility pole and a clamp cover of a retaining clamp connected adjacent thereto. The present invention relates to a bird damage prevention cover for a tension insulator that is to be prevented in advance.

Conventionally, in pole work at the top of the utility pole, in order to connect the ends of the wires installed on both sides of the utility pole, tension insulators are arranged on both sides of the armature on the top of the utility pole toward the ends of each wire, The end of each electric wire is connected to the tip of a metal rod extending from the center of each tension insulator via a clamping clamp. In addition, a clamp cover for the holding clamp is attached to the holding clamp. In addition, an edge turning electric wire is connected between the left and right holding clamps sandwiching the utility pole (see, for example, Patent Document 1).
JP-A-6-351136 (page 2-3, FIG. 8)

  In the configuration of the above-mentioned Patent Document 1, the clamping clamp is covered with a synthetic resin clamp cover for safety, but the tension insulator is provided between the clamp cover and the tension insulator. A slight gap remains where the central metal rod is exposed to the outside. Therefore, for example, when a bird such as a spider flies to nest on a pillar, and a metal long object such as a hanger is carried, one end of the long object is inserted through the slight gap and the tensile strength is increased. There was a case where a short-circuit accident occurred due to contact with the metal rod at the center of the insulator.

  Accordingly, the present invention has been made in view of the above problems, and prevents a short-circuit accident caused by a bird by preventing a metal long object from being inserted into the gap between the clamp cover and the tension insulator. It is an object of the present invention to provide a bird damage prevention cover for a tension insulator that is made to do so.

  In order to achieve such an object, the bird injury prevention cover for a tension insulator according to the present invention is made of a non-conductive material such as a synthetic resin material or a synthetic rubber, and is one end face of the tension insulator and is a clamping clamp. And has an outer diameter that fits between a plurality of concentric annular projections formed on the surface opposite to each other, and both end surfaces in the direction of the central axis are opened, and the lower end is separated along a line parallel to the central axis. A short cylindrical cover main body, an annular flange portion provided on the inner peripheral surface of the cover main body and provided with a cut extending outward from the inner end edge, and downward from both sides of the separation portion at the lower end portion of the cover main body It is characterized by comprising a pair of extended connecting pieces, and an engaging portion and a non-engaging portion that are provided on both connecting pieces and engage with each other in a freely detachable manner.

  At this time, it is preferable that an elastic member surrounding the periphery of the metal rod extending from the center of the tension insulator is disposed on the inner peripheral surface of the cover main body.

  Moreover, it is preferable to provide the support piece for pinching | pinching with an indirect hot wire tool in the outer peripheral surface of the said cover main body.

  The bird damage prevention cover for a tension insulator according to the present invention is formed into a short cylindrical shape and a plurality of concentric circles formed on one side end face of the tension insulator and facing the retaining clamp. It has an outer diameter that fits between the annular projections, and an annular flange portion is provided around the inner peripheral surface, so that the bird damage prevention cover for the tension insulator is placed in the gap between the clamp cover and the tension insulator. By fitting and fitting, the metal rod extended from the center of the tension insulator can be completely covered. Therefore, there is no room for a metal long object carried by a bird for nesting to be inserted into the gap, thereby having a beneficial effect of preventing a short circuit accident caused by the bird.

  Further, by arranging an elastic member surrounding the periphery of the metal rod extending from the center of the tension insulator on the inner peripheral surface of the cover main body, the sealing performance with respect to the metal rod portion is improved, and the short-circuit accident can be prevented in advance. The effect is further enhanced.

  In addition, by providing a support piece for clamping with an indirect hot wire tool on the outer peripheral surface, the indirect hot wire tool can be used, and the work for installing the bird damage prevention cover for a tension insulator is possible even when the electric current is passed through the wire Therefore, there is no need to cut off the current for a certain period, and there is an effect that it is not necessary to disturb the surrounding houses.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a bird damage prevention cover for tension insulators according to the present invention (hereinafter simply referred to as “bird damage prevention cover”) will be described in detail with reference to the drawings. FIG. 1 is a perspective view seen from the front of a bird damage prevention cover and an elastic member according to the present invention, FIG. 2 is a perspective view seen from the rear of the bird damage prevention cover, and FIG. 3 is a front sectional view of the same. The bird damage prevention cover A is formed of a non-conductive material such as a synthetic resin material or synthetic rubber, but preferably a flame retardant material is selected. For example, in the present invention, it is molded into a short cylinder shape using flame-retardant polyethylene. Further, the bird damage prevention cover A is formed between concentric large and small diameter annular protrusions h1 and h2 formed on a side face of a tension insulator H which will be described later and which faces the retaining clamp T. The outer diameter fits into the annular groove h3.

  The bird damage prevention cover A has a cover body 1 in which both end surfaces in the central axis direction are opened and a lower end portion is separated along a line parallel to the central axis line to form a separation portion 2. An annular flange portion 4 is integrally provided at a substantially intermediate position in the central axis direction on the inner peripheral surface of the cover body 1 with the insertion hole 3 remaining in the center portion. The insertion hole 3 has an inner diameter that is slightly larger than the outer diameter of the metal rod h4 of the tension insulator H. The annular flange portion 4 is cut such that the position corresponding to the separation portion 2 is continuous with the separation portion 2, and the inner end edge communicates with the insertion hole 3 and extends radially outwardly. The notch 5 is provided. This is because the separation part 2 is opened when the bird damage prevention cover A is attached, and accordingly the cover body 1 and the annular flange part 4 are easily opened so that the opening and closing operation can be performed smoothly. It is.

  A pair of connecting piece portions 6 a and 6 b are provided that extend downward from both sides of the separation portion 2 at the lower end portion of the cover body 1. Among these, a locking projection 7 as an engaging portion is provided on the opposing surface of one of the connecting piece portions 6a as an engaging portion having a locking claw 7a whose tip is pointed like an arrow. On the other hand, the opposing surface of the other connecting piece 6b is provided with an engaging hole 8 as a non-engaging portion into which the locking claw 7a of the locking projection 7 is detachably fitted when pressed against each other. ing. Each of the connecting piece portions 6a and 6b is provided with reinforcing ribs 9a and 9b protruding from the periphery thereof. Reference numeral 10 denotes an overhanging piece that protrudes so as to cover from one edge to the other edge when the separation part 2 is closed in the separation part 2 of the cover body 1.

  When attaching the bird damage prevention cover A to the outer peripheral surface of the cover body 1 on both sides of the separation part 2 using an indirect hot wire tool (not shown), it is pinched with the indirect hot wire tool. Supporting pieces 11 and 11 are provided. Both support pieces 11 and 11 are arranged at a position where the bird damage prevention cover A is substantially in the shape of a letter C when viewed from the front so as to be sandwiched and easily attached.

  In FIG. 1, reference numeral 12 denotes an elastic member that is bonded to the inner peripheral surface of the cover body 1 and is molded from a foamed synthetic resin or synthetic rubber. In the present invention, for example, a foamed closed cell is used. The synthetic rubber is selected. This elastic member has a sponge shape, is formed in a cross-sectional square shape and a rod shape, and an adhesive layer 14 covered with a release paper 13 is provided on one side surface of the peripheral side surface. Further, the elastic member 12 is used when it is desired to further improve safety so as not to cause a short-circuit accident. Originally, the object of the present invention is sufficiently achieved without using the elastic member 12. it can.

  The bird harm prevention cover A according to the present invention has the above-described configuration. Next, the attachment method and the attached state will be described. 4 is a front view of the upper part of the utility pole showing the usage state of the bird damage prevention cover according to the present invention, FIG. 5 is an enlarged perspective view of the main part, and FIG. 6 is an enlarged front sectional view of the main part. In the figure, D is a utility pole, and a high-voltage direct attachment bracket K, which is a metal arm, is provided substantially horizontally on one side of the utility pole D, and two tension insulators H, H is connected and arranged. Further, electric wires W, W are installed on both the left and right sides of the utility pole D, and the end portions of the electric wires W, W and the tension insulators H, H on the both sides are connected by holding clamps T, T, respectively. Further, a clamp cover C made of synthetic resin is attached to the holding clamps T and T. Among these, a part of the metal rod h <b> 4 extending from the tension insulator H is also covered with the clamp cover C.

  Therefore, before attaching the bird damage prevention cover A, the elastic member 12 is attached so that the adhesive layer 14 from which the release paper 13 is peeled is pressed against the inner peripheral surface of the cover body 1 located on the clamp cover C side. Deploy. At this time, both ends of the elastic member 12 in the longitudinal direction correspond to the separating portion 2. Thereby, the periphery of the insertion hole 3 is covered with the elastic member 12.

  Next, the separation part 2 is opened, and the bird damage prevention cover A is fitted into the gap between the clamp cover C and the tension insulator H from above, and the peripheral edge of the cover body 1 is inserted into the annular groove h3 on the end surface of the tension insulator H. Is placed over the metal rod h4. At this time, the elastic member 11 is located on the clamp cover C side. And the bird damage prevention cover A is attached as shown in FIG. 5, FIG. 6 by engaging the engagement protrusion 7 with the engagement hole 8 on both sides of both connection piece part 6a, 6b.

  When the bird damage prevention cover A is attached using an indirect live wire tool, the support piece 11 provided on the outer peripheral surface of the cover body 1 is sandwiched between the tips of the indirect live wire tool, and bird damage is performed in the same manner as described above. The prevention cover A is fitted into the gap between the clamp cover C and the tension insulator H from above, and the metal rod h4 is placed so that the peripheral edge of the cover body 1 is fitted in the annular groove h3 on the end surface of the tension insulator H. Further, by sandwiching both connecting pieces 6a, 6b from both sides with an indirect hot wire tool, the engagement projection 7 is engaged with the engagement hole 8, and the bird damage prevention cover A is attached.

As described above, the bird harm prevention cover A according to the present invention completely covers the metal rod h4 extending from the center of the tension insulator H by fitting in the gap between the clamp cover C and the tension insulator H. Can do. As a result, even if a long metal object carried by a bird for nesting is inserted into the gap, its entry is blocked by the annular flange portion 4 or the elastic member 12 in the bird damage prevention cover A. There is no room to prevent a conventional short-circuit accident.
If the elastic member 12 is mounted in the bird damage prevention cover A, the effect of preventing a short circuit accident can be further enhanced.

The perspective view seen from the bird damage prevention cover and elastic member which concern on this invention from the front. The perspective view seen from the back of a bird damage prevention cover. FIG. The front view of the telephone pole upper part which shows the use condition. The expansion perspective view of the principal part. The expanded front sectional view of the principal part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cover body 2 Separation part 4 Annular flange part 5 Notch 6a Connection piece part 6b Connection piece part 7 Engagement part (locking protrusion)
8 Non-engagement part (engagement hole)
DESCRIPTION OF SYMBOLS 11 Support piece 12 Elastic member A Bird damage prevention cover H Tensile insulator h1 Large-diameter annular convex part h2 Small-diameter annular convex part h4 Metal rod T Holding clamp

Claims (3)

  It is made of a non-conductive material such as a synthetic resin material or synthetic rubber, and is an outer surface that fits between a plurality of concentric annular protrusions formed on one end surface of the tension insulator and facing the retaining clamp. A short cylindrical cover body having a diameter and having both ends in the central axis direction open and having a lower end separated along a line parallel to the central axis, and an inner end provided on the inner peripheral surface of the cover body An annular flange portion provided with a notch extending outward from the edge, a pair of connecting piece portions extending downward from both sides of the separating portion at the lower end portion of the cover body, and a pair of connecting piece portions provided on both connecting piece portions. A bird damage prevention cover for a tension insulator, comprising an engaging portion and a non-engaging portion that are detachably engaged.   The bird damage prevention cover for a tension insulator according to claim 1, wherein an elastic member surrounding the periphery of the metal rod extending from the center of the tension insulator is disposed on the inner peripheral surface of the cover body.   The bird damage prevention cover for a tension insulator according to claim 1 or 2, wherein a support piece for clamping with an indirect hot wire tool is provided on the outer peripheral surface of the cover body.

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