JP2009171698A - Device for branching wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for branching a wire which can obtain a desired wire nipping force with a comparatively small spring and can be reduced in size. <P>SOLUTION: The device 1 for branching a wire comprises a main body 2, a cover 3 and a clamping member 4 for clamping the main body and the cover. The cover 3 is pivotally mounted on the main body 2 so as to grip an overhead wire W with regard to the main body 2. The main body 2 has a grip member 5 and a branch sleeve 6. A branch wire W1 is inserted into the branch sleeve 6 to be compression-connected. The grip member 5 has a grip recessed part 5c. The cover 3 is pivotally mounted on the grip member 5 at one end side and has a grip recessed part 3c for receiving the overhead wire W opposed to the grip recessed part 5c. A tightening member 4 has a bolt 8 and spring 9. The bolt 8 penetrates through the grip member 5 and the cover 3, allowing one end side to be engaged with and disengaged from the cover 3. The spring 9 is locked with: the grip member 5 at one end thereof; and the other end of the tightening bolt 8 at the other end thereof. The cover 3 strongly grips the overhead wire W by the lever action. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric wire branching device used to connect a branch line to an overhead electric wire in a substation or the like.

  In an electrical facility such as a substation, there is a case where an electric wire serving as a branch line is branched from an overhead electric wire serving as a main line. At that time, if the branch line is fixed to the main line using a compression terminal or the like, it will be difficult to remove the branch line for maintenance or the like at a later date.

Therefore, a branch device (branch clamp) that can be easily attached to and detached from the main line has been conventionally used (see, for example, Patent Document 1). This branch clamp has a clamp body having a wire contact portion with an arc-shaped cross section that circumscribes the upper portion of the electric wire, a receiving member attached below the clamp main body, and a pressing member attached to the bottom of the receiving member. is doing. The clamp body has a pair of hanging pieces extending downward from both sides of the wire contact portion, and an engaging portion that protrudes inward in the opposing direction is provided at the lower end edge of each hanging piece. A branch sleeve (branch portion) extends downward from the outer surface of one drooping piece, and the branch line is inserted into the branch sleeve and compressed by a compression tool.
Extending portions that stand upward are provided on both side edges of the receiving member, and an engaging portion projects from an outer edge portion of the upper end thereof. The receiving member is locked to the clamp body by engaging the engaging portion with the engaging portion of the hanging piece of the clamp body.
The pressing member includes a head having an arc-shaped pressing surface circumscribing the lower portion of the electric wire, and a bolt portion extending downward from the head. The bolt part protrudes downward through the through hole in the bottom part of the receiving member, and a nut is attached to the end part.
A spring is disposed on the outer periphery of the bolt portion, and the head of the pressing member is pressed upward by this spring. Thereby, an electric wire is clamped by the lower surface of a clamp main body, and the head of a press member.
JP 2002-044817 A

In the above conventional wire branching device, the pinching force of the electric wire depends only on the spring force. Therefore, in order to obtain a desired pinching force, it is necessary to use a correspondingly large spring, which increases the size of the device. There is a problem.
An object of the present invention is to provide an electric wire branching device that can obtain a desired electric wire clamping force using a relatively small spring, and that can be downsized.

In order to solve the above-mentioned problem, in the invention according to this application, a body 2 made of a highly conductive metal and a body made of a highly conductive metal pivotally attached to the body 2 so as to be able to grip an overhead electric wire W between the body 2. An electric wire branching device 1 is configured by including a cover 3 and a fastening member 4 for fastening between the cover 2 and the main body 2 with the overhead electric wire W interposed therebetween.
The main body 2 is provided with a gripping member 5 and a branch sleeve 6, and a branch line W <b> 1 is inserted into the branch sleeve 6 to enable compression connection. The holding member 5 is provided with a holding recess 5c for receiving the overhead electric wire W in order to hold it.
The cover 3 is pivotally attached to the grip member 5 of the main body on one end side, and has a corresponding grip recess 3 c that receives the overhead wire W facing the grip recess 5 c of the grip member 5.
The fastening member 4 has a fastening bolt 8 and a spring 9. The tightening bolt 8 penetrates the grip member 5 and the cover 3, and one end side is provided on the cover 3 so as to be freely disengaged. One end of the spring 9 is locked to the holding member 5 of the main body, and the other end is locked to the other end of the tightening bolt 8.
From the distance d1 between the axis of the overhead wire W gripped between the cover 3 and the main body 2 and the pivot center of the cover, the distance d2 between the axis of the overhead wire and the axis of the fastening bolt is It is set large. Thereby, a large electric wire gripping force can be obtained with a small spring force by the lever principle, and the spring can be relatively miniaturized.

According to the apparatus of the invention of this application, for example, the distance d1 between the axial center of the overhead wire W and the pivot center of the cover 3 is X, and the distance d2 between the pivot center of the tightening bolt 8 and the pivot center of the cover 3 is. Is set to 3X, it is possible to obtain a gripping force that is approximately three times that of the case where the overhead wire holding portion is provided immediately above the same spring, and the spring can be relatively downsized.
While the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to this.

  Embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view of a wire branching device according to the present invention, FIG. 2 is a front view of the wire branching device of FIG. 1, FIG. 3 is a rear view of the wire branching device of FIG. 5 is a plan view of the wire branching device of FIG. 1, FIG. 6 is a sectional view taken along line VI-VI in FIG. 2, and FIG. 7 is a sectional view taken along line VII-VII in FIG.

  The electric wire branching device 1 includes a main body 2 made of a highly conductive metal such as an aluminum alloy, and a cover 3 made of the same highly conductive metal that is pivotally attached to the main body so that the overhead electric wire W can be gripped between the main body 2 and the main body 2. A fastening member 4 for fastening between the main body 2 and the cover 3 with the overhead electric wire W interposed therebetween is provided.

  The main body 2 includes a gripping member 5 and a branch sleeve 6. The gripping member 5 is made of a substantially rectangular plate-like member, and has an inner side surface 5a facing the cover 3 in a state where the overhead electric wire W is gripped, and an outer side surface 5b on the opposite side. At a position near the upper edge of the inner surface 5a of the grip member 5, there is a grip recess 5c that receives the overhead electric wire W along the upper edge. The branch sleeve 6 is for inserting and compressing the branch line W1, and is inclined downward from the vicinity of the center of the outer surface 5b of the gripping member 5 and extends downward.

  A pair of covers 3 are provided on the left and right in the extending direction of the overhead electric wire W, and are pivotally attached to the upper edge portion of the gripping member 5 by pivots 7. The cover 3 is made of a substantially rectangular plate-like member, and has an inner side surface 3a that faces the gripping member 5 in a state where the overhead electric wire W is gripped, and an outer side surface 3b on the opposite side. At a position near the upper edge of the inner surface 3 a of the cover 3, there is a gripping recess 3 c that faces the gripping recess 5 c of the gripping member 5.

  A pair of fastening members 4 are provided corresponding to the pair of covers 3 on the left and right in the direction of extension of the overhead electric wire W, and each has a bolt 8 and a spring 9 as shown in FIG. The bolt 8 passes through the gripping member 5 and the insertion holes 5 d and 3 d of the cover 3, and a head 8 a on one end side is provided on the cover 3 so as to be freely disengaged. That is, as shown well in FIG. 2, the head 8 a has an oval cross-sectional shape in the direction perpendicular to the axis, and the hole 3 d of the cover 3 has an oval cross-section. The engagement can be freely released. One end of the spring 9 is locked to the outer surface 5 b of the gripping member 5, and the other end is locked to the other end of the tightening bolt 8 via a washer 10 and a nut 11.

  Therefore, in the illustrated state in which the head 8a of the bolt 8 is engaged with the cover 3, the bolt 8 pulls the cover 3 toward the gripping member 5 by the restoring force of the compressed spring 9, and is inserted between the two. Tighten the electric wire W.

  As shown well in FIG. 7, a pair of holding members 12 that hold the fastening member 4 are provided on the outer surface 5 b side of the gripping member 5. The holding member 12 includes a support frame 13 that is integral with the gripping member 5 and an adjustment bolt 14 that is screwed to the support frame 13. The support frame 13 includes a pair of parallel plate-like leg portions 13a erected at right angles from both sides of the hole 5d of the gripping member 5 and a receiving plate portion 13b that connects the tip ends of the leg portions at right angles. . The adjustment bolt 14 is screwed into the receiving plate portion 13 b and the tip thereof is joined to the tip of the bolt 8. If the bolt 8 is pushed out toward the head 8a against the spring 9 by adjusting the screwing of the adjusting bolt 14, the cover 3 is loosened. If the axial force applied to the bolt 8 is eliminated and this is rotated by 90 °, the head 8a and the cover 3 can be disengaged. In this state, the cover 3 is opened, and the overhead electric wire W can be taken between the cover 3 and the gripping member 5. If the cover 3 is opened, the overhead wire W is placed in the holding recesses 3c, 5c, the bolt 8 is rotated to engage the head 8a with the cover 3, and then the adjustment bolt 14 is loosened, the spring 9 is The overhead electric wire W is elastically gripped between the cover 3 and the gripping member 5 by being restored.

  As shown in FIG. 4, from the distance d1 (for example, 25 mm) between the axis of the overhead electric wire W to be gripped and the pivot center of the cover 3, the axis of the fastening bolt 8 and the pivot center of the cover 3 are separated. The distance d2 (for example, 75 mm) is set large. That is, in the cover 3, the electric wire gripping portion serving as the action point is disposed between the pivot supporting point serving as the fulcrum and the bolt penetrating portion serving as the force point. As a result, the moment of the force that generates the gripping force of the overhead wire W can be set large, and the spring 9 can be relatively miniaturized.

  As shown in FIG. 6, the branch sleeve 6 has a gripping member 5 such that its axis intersects with the center of the gripping space constituted by the gripping recesses 3 c and 5 c, that is, substantially perpendicular to the axis of the overhead electric wire W. The outer surface 5b extends at a predetermined angle. Therefore, it is difficult to apply an excessive bending stress near the root of the sleeve during use.

  In other embodiments shown in FIGS. 8 and 9, the branch sleeve 6 extends vertically downward from the lower edge of the gripping member 5, and its axis is relative to the axis of the overhead electric wire W to be gripped. It is set to intersect almost vertically. In this case, the branch sleeve 6 is cast integrally with the gripping member 5. Other configurations are the same as those of the previous embodiment, and thus the same reference numerals are given and description thereof is omitted.

It is a perspective view of the electric wire branching apparatus which concerns on this invention. It is a front view of the electric wire branching apparatus of FIG. It is a rear view of the electric wire branching apparatus of FIG. It is a side view of the electric wire branching apparatus of FIG. It is a top view of the electric wire branch apparatus of FIG. It is VI-VI sectional drawing in FIG. It is VII-VII sectional drawing in FIG. It is a front view of the electric wire branch apparatus of other embodiment. It is a side view of the electric wire branch apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Branching device 2 Main body 3 Cover 3a Inner side surface 3b Outer side surface 3c Holding recessed part 3d Through-hole 4 Tightening member 5 Holding member 5a Inner side surface 5b Outer side surface 5c Holding recessed part 5d Through-hole 6 Sleeve 7 Pivot 8 Bolt 8a Head 9 Spring 10 Washer 11 Nut 12 Holding member 13 Support frame 13a Leg portion 13b Receiving plate portion 14 Adjustment bolt

Claims (3)

A body made of a highly conductive metal, a cover made of a highly conductive metal that is pivotally attached to the body and can hold an overhead wire, and a fastening member that tightens between the body and the cover that sandwich the overhead wire And
The main body includes a gripping member having a gripping recess for receiving the overhead electric wire, and a branch sleeve that extends from the gripping member and can be compression-connected by inserting a branch line.
The cover has a corresponding gripping recess for receiving the overhead electric wire facing the gripping recess of the gripping member, and is pivotally attached to the gripping member of the main body on one end side,
The tightening member includes a tightening bolt that passes through the gripping member and the cover and has one end detachably provided to the cover, one end locked to the gripping member of the main body, and the other end to the other end of the tightening bolt. A spring to be locked, and configured to elastically tighten the overhead electric wire gripped between the gripping member and the cover,
The distance between the axis of the overhead wire and the axis of the fastening bolt is larger than the distance between the axis of the overhead wire held between the cover and the main body and the pivot center of the cover. An electric wire branching device that is set.   2. The electric wire branching device according to claim 1, wherein the branch sleeve is set so that an axis of the branch sleeve substantially perpendicularly intersects the axis of the gripped overhead electric wire. The grip member of the main body is composed of a substantially plate-like member having an inner surface facing the cover in a state where the overhead electric wire is gripped, and an outer surface on the opposite side.
The branch sleeve extends from near the center of the outer surface of the gripping member;
The pair of covers are pivotally attached to the gripping member of the main body along the axial direction of the overhead electric wire,
The electric wire branching device according to claim 1, wherein the pair of fastening members are provided so as to fasten the gripping member and the covers.

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