JP2013085344A - Grip unit of spacer for multiple conductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grip unit of a spacer for a multiple conductor capable of commonalizing components for a fixed type grip unit and a loose type grip unit, for reducing a cost, by switching a plurality of grip units, attached to an interval frame, to any one of the fixed type grip unit and the loose type grip unit so as to be made usable.SOLUTION: The grip unit includes a loose clamp body 13 for gripping an electric wire W, a connection member 14 which holds the loose clamp body 13 for swinging in an angular range that is set in advance around the axis of the electric wire W that is gripped, to be connected to an interval frame 11, and a loose rock bracket 30 which is detachably attached between the connection member 14 and the loose clamp body 13, and prevents the swinging relative to the connection member 14 of the loose clamp body when attached.

Description

  The present invention relates to a multi-conductor spacer gripping unit, and in particular, can be used by switching a plurality of gripping units mounted on an interval frame to either a fixed gripping unit or a loose gripping unit. The present invention relates to a multi-conductor spacer holding unit.

  Conventionally, a plurality of gripping units are mounted on an interval frame, and each of the gripping units grips separate element conductors (hereinafter referred to as `` wires ''), with a distance so that the wires do not contact each other. There are many known multiconductor spacers to hold.

  By the way, the icing snow on the electric wire of the single conductor transmission line develops into a cylindrical snow while sliding around the electric wire in the longitudinal direction more along the groove, and when the electric wire is twisted and rotated by the rotation of this cylindrical snow, It is known that the rotation of tube snow is encouraged to develop into larger tube snow.

  Therefore, as a gripping unit that is attached to each corner of the frame of one spacer, a fixed gripping unit with a structure that does not allow rotation of the gripped wire in the direction around the axis and rotation around the axis are set in advance. A two-piece holding unit of a loose-type holding unit configured to be allowed in an angular range is prepared, and when viewed from the line direction, a fixed holding unit or A multi-conductor spacer structure provided with a loose-type gripping unit is known. In this multi-conductor spacer structure, one half of the fixed-type gripping unit holds and grips one half of the power transmission line, and the other half of the half-side grip unit loosely grips the other half of the power transmission line. In order to prevent short circuit accidents due to galloping of large-amplitude vibrations caused by strong winds during icing snow, the torsional rigidity of one half transmission line and the other half transmission line are different. An overhead power transmission line is also known (for example, Patent Document 1).

JP-A-8-9544.

  However, the multiconductor spacer gripping unit used in the overhead power transmission path described in Patent Document 1 needs to be prepared by separately forming a fixed gripping unit and a loose gripping unit. For this reason, there is a problem that the molds for forming each part have to be prepared individually, so that the cost of the molds is increased, and the part management is troublesome and the cost is increased.

  Therefore, by making it possible to use a plurality of gripping units mounted on the interval frame by switching to either the fixed gripping unit or the loose gripping unit, the fixed gripping unit components and the loose gripping unit components The technical problem to be solved in order to provide a multi-conductor spacer gripping unit capable of reducing the cost and the like is generated, and the present invention aims to solve this problem. .

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 is a gripping unit for a multi-conductor spacer for gripping an element conductor on a frame, and grips the element conductor. A loose clamping body, a coupling member formed by holding the loose clamping body around the axis of the gripped element conductor so as to be swingable within an angle range and coupled to the frame, and the coupling A loose-lock fitting that is detachably attached between a member and the loose clamp body and prevents the loose clamp body from swinging relative to the connecting member when attached. Provide units.

  According to this configuration, when a loose lock fitting is attached between the connecting member and the loose clamp main body, it can be used as a fixed-type gripping unit that fixes and grips the element conductor. On the other hand, when the loose lock fitting is removed, it can be used as a loose-type gripping unit that grips the element conductor loosely. In other words, even after installing the spacer, the setting can be easily changed to either the fixed gripping unit or the loose gripping unit by attaching or detaching the loose lock bracket. In contrast, it is possible to change the arrangement of the gripping portions, which is effective for suppressing galloping. If only the loose lock fitting is prepared, the fixed gripping unit can be used with the same structure as the loose gripping unit.

  According to a second aspect of the present invention, in the configuration according to the first aspect, the gripping unit has a projecting amount projecting from the axial center of the spacing frame to both sides in the electric wire axial direction as an asymmetric ratio, and a plurality of gripping units. Provided is a multiconductor spacer gripping unit in which all units are formed with substantially the same asymmetric ratio.

  According to this configuration, the center of gravity of the gripping unit is disposed on the same side in the longitudinal direction of the element conductor and at a position approximately the same distance from the axis center. For this reason, the electromagnetic attractive force at the time of a short circuit becomes the same in all the gripping units, and the bending moment applied to the frame can be eliminated.

Since the invention according to claim 1 can be set to either the fixed gripping unit or the loose gripping unit by attaching and detaching the loose lock fitting even after the spacer is attached,
It is possible to change the arrangement of the gripping portion, which is effective for suppressing galloping, for example, tension to suspension change). Also, if only the loose lock fitting is prepared, the fixed gripping unit and the loose gripping unit can have the same structure, so that the cost of the mold and the like can be reduced, and the parts management can be simplified. As a result, the cost can be reduced.

  The invention according to claim 2 has the same electromagnetic attraction force at the time of a short circuit in all the gripping units, and can eliminate the bending moment applied to the frame. Therefore, the bending moment may not be taken into consideration. Inexpensive materials can be used. Thereby, the cost can be further reduced.

The front view of the spacer for multiconductors shown as an Example to which this invention is applied. The side view of the spacer for multiconductor same as the above seen from the AA line direction of FIG. The side view of the spacer for multiconductor same as the above seen from the BB line direction of FIG. The side view which shows the holding | grip unit in a spacer same as the above in the fixed-type holding | grip unit state. The front view of the holding unit same as the above shown in FIG. The CC sectional schematic sectional drawing of FIG. The side view of the loose lock metal fitting of a holding unit same as the above. The top view of the loose lock metal fitting of a holding unit same as the above. The front view of the loose lock metal fitting of a holding unit same as the above. The front view of the spacer for multiconductors which shows the other Example to which this invention is applied.

  According to the present invention, a plurality of gripping units mounted on a frame can be used by switching to either a fixed gripping unit or a loose gripping unit. In order to achieve the object of providing a multi-conductor spacer gripping unit that can reduce the cost by using common parts, in the multi-conductor spacer gripping unit for gripping the element conductor on the frame, A loose clamp body for gripping the element conductor; and the loose clamp body is connected to the frame body by holding the loose clamp body around the axis of the gripped element conductor so as to be swingable within an angular range. A connecting member, and is detachably attached between the connecting member and the loose clamp, and when attached, the loose clamp with respect to the connecting member And the loose lock fitting to prevent movement was achieved by having the.

  Hereinafter, a gripping unit for a multiconductor spacer according to an embodiment of the present invention will be described in detail with reference to FIGS.

  1 to 3 show an embodiment of a multiconductor spacer to which a gripping unit according to the present invention is applied. FIG. 1 is a front view thereof, FIG. 2 is a right side view thereof, and FIG. 3 is a left side view thereof. It is. In the figure, a multi-conductor spacer 10 is a four-conductor spacer provided with gripping units 12 at left and right axially symmetric positions of a rectangular interval frame 11.

In addition, as shown in FIGS. 2 and 3, all the gripping units 12, 12, 12, and 12
When the axial center line of the spacing frame 11 of the multi-conductor spacer 10 is X, it protrudes from the axial center line X in one direction in the longitudinal direction of the electric wire axis of the gripping units 12, 12, 12, 12. The ratios of the gripping units 12 are the same and asymmetric so that the amount b protruding in the other direction with respect to the amount a is larger, and the center of gravity of all the gripping units 12, 12, 12, 12 is Is set on the other side (b) and at a position away from the axial center line X by substantially the same distance.

This point will be described in more detail. In conventional spacers, symmetrical and asymmetrical gripping units are mixed, but when symmetrical and asymmetrical gripping units are mixed in this way, the electromagnetic attractive force at the time of a short circuit is reduced by the interval frame. A bending moment is applied to the body. Therefore, the conventional spacing frame must be designed with a strength that also takes this bending moment into consideration. However, as in this embodiment, all the gripping units 12, 12, 12, 12 have an asymmetric ratio in the longitudinal direction as viewed from the axial center line X of the spacing frame 11 with respect to the longitudinal direction of the electric wire axis. In the same case, the bending moment generated in the interval frame 11 due to the load at the time of short circuit is eliminated. For this reason, it is possible to reduce the weight in terms of strength, and it is possible to reduce the cost by using an inexpensive material.

  The structure of the gripping unit 12 will be further described. Each gripping unit 12 can be switched from a loose-type gripping unit to a fixed-type gripping unit by attaching a later-described loose lock fitting 30 shown in FIGS. When the loose-lock fitting 30 is removed, the fixed-type gripping unit can be switched to the loose-type gripping unit. 4 to 6 show a state in which the loose lock fitting 30 is attached and used as a fixed gripping unit.

  The gripping unit 12 shown in FIGS. 4 and 6 includes a loose clamp main body 13, a connecting member 14, the loose lock fitting 30, and the like.

The loose clamp body 13 is formed into a cylindrical shape that is divided into two, a grip half 13a and a grip half 13b, so that the wire W can be gripped from both sides, and one end side is parallel to the central axis of the wire W. The hinge pins 15a and 15b are rotated as fulcrums, and the other end side is rotatable. Further, the opposing surfaces of the gripping half 13a and the gripping half 13b are provided with wire receiving grooves 16 and 16 each having a semicircular cross section, and the gripping half 13a and the gripping half 13b are connected to each other. Both the wire receiving grooves 16 and 16 are formed so as to substantially coincide with the outer diameter of the electric wire W when they are closed to each other.

  Accordingly, when the loose clamp body 13 receives the wire W in the wire receiving grooves 16 and 16 and closes the grip half 13a and the grip half 13b, the grip half 13a and the grip half are closed. The electric wire W can be gripped with 13b. In addition, after the electric wire W is grasped by the grasping half 13a and the grasping half 13b, the other ends of the grasping half 13a and the grasping half 13b are fastened and fixed to each other by the tightening nut 17. In addition, as shown in FIG. 1, the mounting position of the tightening nut 17 in this embodiment is the same clockwise direction in each gripping unit 12, 12, 12, and 12, and each gripping unit 12,12, The tightening operation of the tightening nut 17 at 12, 12 can be performed from the same direction with respect to each gripping unit.

  The connecting member 14 has a neck portion 14a in the middle. Further, a T-shaped protrusion 14b is integrally provided on one end side of the neck portion 14a, and a clevis-shaped attachment portion 14c is integrally provided on the other end side. The clevis-type mounting portion 14c is connected to the terminal 19 on the interval frame 11 side so as to be swingable in the electric wire longitudinal direction. On the other hand, as shown in FIG. 5, the T-shaped projecting portion 14b is accommodated in the loose clamp body 13 by the neck portion 14a passing through the slit 20 formed in the loose clamp body 13, and The clamp body 13 is disposed in an annular gap 18. The T-shaped projection 14b disposed in the gap 18 can swing within the gap 18 within a predetermined angle around the axis together with the neck 14a moving in the slit. A loose operation can be obtained by this swinging.

As shown in FIGS. 4 and 6, the holding half 13 a and the holding half 13 b have engaging recesses 21 and 21 in the form of grooves extending in the vertical direction corresponding to the connecting member 14. It is formed symmetrically, and a part of the loose lock fitting 30 (lock leg portions 33a and 33b described later) can be fitted into the engagement recesses 21 and 21.

As shown in FIGS. 7 to 9, the loose lock metal fitting 30 includes a pair of left and right metal half halves 30a,
There are provided two fastening bolts 31 and 31 for connecting and fixing 30b and the metal fitting halves 30a and 30b.

The metal half 30a and the metal half 30b are integrally provided with mounting portions 32a, 32b and lock leg portions 33a, 33b suspended downward from substantially the lower center of the mounting portions 32a, 32b, respectively. It is formed in a substantially bilateral shape. Further, U-shaped concave portions 34 and 34 and mounting holes 35 and 36 are provided on the opposing surfaces of the mounting portion 32a and the mounting portion 32b, respectively. The mounting hole 35 formed in the metal half 30a is a hole through which the fastening bolt 31 passes, and the mounting hole 36 formed in the metal half 30b is the mounting hole of the metal half 30a. 35 is a screw hole into which the fastening bolt 31 inserted through 35 is screwed.

The metal fitting half 30a and the metal fitting half 30b are substantially the same as the outer shape of the neck 14a of the connecting member 14 when the attachment portion 32a and the attachment portion 32b are abutted with each other. A matching rectangular opening is formed. Further, each of the lock legs 33a,
33b substantially coincides with the positions of the engaging recess 21 of the gripping half 13a and the engaging recess 21 of the gripping half 13b, and the mounting hole 35 and the mounting hole 36 correspond to each other. Yes.

Accordingly, the neck 14a of the connecting member 14 is received in the recesses 34, 34, and the lock legs 21 are respectively provided in the engagement recess 21 of the grip half 13a and the engagement recess 21 of the grip half 13b. When the parts 33a and 33b are fitted, and the fastening bolt 31 is attached to the attachment hole 36 of the metal half 30b through the attachment hole 35 of the metal half 30a, the metal half 30a and the metal fitting A half 30b is attached to the gripping unit 12. That is, the loose lock fitting 30 is attached to the gripping unit 12. Further, when the loose lock metal fitting 30 is attached to the gripping unit 12 in this way, the loose operation in which the loose clamp main body 13 tries to rotate about the axis with respect to the connecting member 14 is performed for the loose use. The clamp body 13 and the lock legs 33a, 3
The grip unit 12 is locked by the contact of 3b, and the lock unit 12 is switched from the loose grip unit 12 to the fixed grip unit. 4 to 6 show the fixed gripping unit 12 to which the loose lock fitting 30 is attached in this manner.

  On the other hand, when it is desired to switch from the fixed gripping unit 12 to the loose gripping unit 12, the metal fitting halves 30a and 30b can be removed by removing the fastening bolts 31 and 31. Can be returned.

As described above, according to the gripping unit 12 according to the present embodiment, when the loose lock fitting 30 is attached between the connecting member 14 and the loose clamp body 13, Can be used. On the contrary, when the loose lock fitting 30 is removed, it can be used as a loose-type gripping unit that grips the wire W loosely. Therefore, even after the spacer is attached, it is possible to switch to either the fixed gripping unit or the loose gripping unit by attaching / detaching the loose lock fitting 30. However, it is possible to change the arrangement of the gripping portions that is effective for suppressing galloping.
If only the loose lock fitting 30 is prepared, the fixed gripping unit can be used with the same structure as the loose gripping unit.

In the above-described embodiment, the configuration in which the mounting position of the fastening nut 17 is provided in the same clockwise direction in each gripping unit 12, 12, 12, 12 is shown. As shown, the mounting position of the tightening nut 17 may be formed so as to face the same upward direction.

  Furthermore, the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

  The present invention is not limited to four conductors and can be applied to multiconductors such as two conductors, three conductors, and five conductors.

DESCRIPTION OF SYMBOLS 10 Multiconductor spacer 11 Space | interval frame body 12 Grasp unit 13 Loose clamp main body 13a, 13b Grasping half body 14 Connection member 14a Neck part 14b T-shaped protrusion part 14c Clevis type attachment part 15a, 15b Hinge pin 16 Electric wire receiving groove 17 Tightening nut 18 Clearance 19 Terminal 20 Slit 21 Engaging recess 30 Loose lock metal fittings 30a, 30b Half metal fitting 31 Tightening bolts 32a, 32b Mounting parts 33a, 33b Locking leg 34 Recess 35 Mounting hole 36 Mounting hole W Elementary conductor X Center line

Claims (2)

In the gripping unit for the multi-conductor spacer for gripping the elementary conductor on the frame,
A loose clamp body for holding the element conductor;
A connecting member formed by holding the loose clamp body around the axis of the gripped element conductor so as to be swingable within an angular range and connected to the frame body;
A loose lock fitting that is detachably attached between the connecting member and the loose clamp body, and prevents the swing of the loose clamp body relative to the connecting member relative to the connecting member when attached;
A gripping unit for a multiconductor spacer.   The gripping unit is characterized in that the amount of protrusion protruding from the axial center of the spacing frame to both sides in the electric wire axial direction is an asymmetric ratio, and all of the plurality of gripping units are formed at substantially the same asymmetric ratio. The multi-conductor spacer holding unit according to claim 1.

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