JP2013247835A - Loose clamp of loose spacer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a loose clamp of loose spacer capable of preventing drop-off of a loose clamp during inspection.SOLUTION: The loose clamp of loose spacer includes: a loose clamp main body 10 having a hinge structure including an SP lock mounting rib 15 mounted with an SP lock 30 and a hooking rib 17 with which the SP lock 30 is hooked; a loose fitting 20 attached to a crevice 40 at the loose spacer side; and a drop-off prevention part 50 attached to the crevice 40. When the loose clamp main body 10 is engaged with the loose fitting 20 while holding an overhead power transmission line and is fixed by the SP lock 30, and when the drop-off prevention part 50 is attached and fixed to the crevice 40, the SP lock mounting rib 15 and an edge portion 51 of the drop-off prevention part 50 come into contact with each other and are fixed.

Description

  The present invention relates to a loose spacer disposed on an overhead power transmission line, and more particularly, to a loose clamp of a loose spacer that can prevent the loose clamp from being detached during inspection.

  Loose spacers are attached to each power transmission line so that the plurality of overhead power transmission lines that are worried about galloping installed on a steel tower or the like do not contact each other by galloping. Thereby, between each transmission line is hold | maintained at the predetermined distance according to the transmission voltage, and the contact accident by a strong wind etc. can be prevented in advance.

  FIG. 4 is a configuration diagram of a four-conductor loose spacer showing a configuration of a conventional four-conductor spacer. In the four clamps that grip the power transmission line in FIG. 4, the right half is a clamp that holds the power transmission line, and the left half is a loose clamp that swings the power transmission line. In grasping a power transmission line (not shown) by the loose clamp main body 10, the SP lock 30 is loosened and the loose clamp main body 10 having a hinge structure is opened. The released loose clamp body 10 is fitted to the loose metal fitting 20 attached to the clevis 40 of the spacer while holding the power transmission line, and is fixed by the SP lock 30 to hold the electric wire.

  In this way, since the two power transmission lines in the right half are fixedly gripped and the two power transmission lines in the left half are swingably gripped, the torsional rigidity of the power transmission lines on each side is different. Since the natural frequency is greatly different, the rotational motion cycle of the entire overhead power transmission line is disturbed, and galloping vibration is prevented. Further, since the power transmission line held by the loose clamp body 10 swings but cannot rotate, no icing snow having a circular cross section is generated, and disconnection due to icing snow can be prevented.

  In this overhead power transmission line, when the loose clamp main body 10 is opened and the inner dimensions are checked at the time of inspection, an accident occurs in which the loose clamp main body 10 is detached from the loose metal fitting 20 and detached and dropped. FIG. 5 is a detachment view of the loose clamp showing the falling and falling of the loose clamp. In FIG. 5, when the SP lock 30 is loosened at the time of inspection and the loose clamp body 10 is opened for dimension measurement, the loose clamp body 10 slips through the loose metal fitting 20 and falls.

  Patent Document 1 discloses that a conductor gripping portion provided on one side of a symmetrical axis fixedly grips an element conductor at an even number of positions on the axis of a frame body, and a looseness provided on the other side. The conductor gripping portion is configured by gripping the element conductor with the loose clamp main body, and connecting the loose clamp main body to the frame so as to be swingable within a predetermined angle range around the axis of the gripped element conductor. There is a statement to the effect.

JP-A-8-9544

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a loose spacer loose clamp capable of preventing the loose clamp from being detached during inspection.

  The loose clamp of the loose spacer of the present invention is a loose clamp of a loose spacer disposed on an overhead power transmission line, and has a hinge structure including a rib to which an SP lock is attached and a rib to which the SP lock is hooked. It has a loose clamp body, a loose fitting part attached to the clevis on the loose spacer side, and a detachment prevention part attached to the clevis, and the loose clamp body fits into the loose fitting while gripping the overhead power transmission line, When the detachment prevention portion is fixed to the clevis by being fixed by the SP lock 30, the rib to which the SP lock is attached and the edge portion of the detachment prevention portion are fixed in contact with each other.

  The loose spacer detachment prevention portion of the loose spacer of the present invention has a detachment prevention main body, a fixing portion fixed to the clevis, and a spring hinge connecting the detachment prevention main body and the fixing portion, and one end of the detachment prevention main body. Has an edge portion that becomes a portion that comes into contact with the rib, and has a hole on the other end side for avoiding a bolt to which a clevis is attached.

  ADVANTAGE OF THE INVENTION According to this invention, the loose clamp of the loose spacer which makes it possible to prevent the loose clamp from separating at the time of inspection can be provided.

The loose clamp block diagram which shows the structure of the loose clamp by this invention. FIG. 3 is a structural diagram showing the structure of a loose clamp detachment preventing portion according to the present invention. The state figure at the time of the inspection of the loose clamp by this invention. 4 is a configuration diagram of a four-conductor loose spacer showing a configuration of a conventional four-conductor loose spacer. FIG. Loose clamp detachment diagram showing loose clamp detachment fall.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a loose clamp configuration diagram showing the configuration of a loose clamp according to the present invention. In FIG. 1 a, the loose clamp 100 includes a loose clamp body 10 having a hinge structure including an SP lock mounting rib 15 to which the SP lock 30 is mounted and a latching rib 17 to which the SP lock 30 is hooked, and a loose spacer ( A loose metal part 20 attached to the clevis (40) on the side (not shown) and a detachment preventing part 50 attached to the clevis (40) are provided.

  At the time of attachment, the loose clamp main body 10 opened by loosening the SP lock 30 is fixed by the SP lock 30 after fitting with the loose metal fitting 20 while gripping the overhead power transmission line. Further, the separation preventing portion 50 is attached and fixed to the clevis (40). When the loose clamp body 10 is fixed by the SP lock 30 and the detachment preventing portion 50 is fixed to the clevis (40), the SP lock mounting rib 15 to which the SP lock 30 is attached, the edge portion 51 of the detachment preventing portion 50, Are fixed in contact with each other at predetermined positions.

  At the time of inspection, when the SP lock 30 is loosened, the loose clamp main body 10 is opened, and the inner dimension check is performed, the loose clamp main body 10 is slipped off while being rotated along the loose metal fitting 20 and is about to be detached. To do. However, since the SP lock mounting rib 15 and the edge portion 51 (dotted circles) are in contact with each other, the movement of rotating and slipping through is stopped, and a fall off accident is prevented. FIG. 1b is a right side view of FIG. 1a.

  FIG. 2 is a structural diagram showing the structure of the loose clamp detachment preventing portion according to the present invention. In FIG. 2, the detachment prevention unit 50 includes a detachment prevention main body 52, a fixing portion 56 fixed to the clevis (40), and a spring hinge 54 that connects the detachment prevention main body 52 and the fixing portion 56. . Further, one end of the detachment prevention main body 52 has an edge portion 51 that is a part that comes into contact with the SP lock mounting rib 15, and a hole 58 is provided on the other end side. The hole 58 is a hole provided to attach the detachment prevention main body 52 while avoiding the bolt in which the clevis (40) is attached to the loose spacer side in advance, and has a diameter larger than that of the bolt.

  FIG. 3 is a state diagram during inspection of the loose clamp according to the present invention. In FIG. 3, when the SP lock 30 is loosened and the loose clamp body 10 is opened, the loose clamp body 10 tries to rotate along the loose metal fitting 20 with the weight of the SP lock 30, but the SP lock mounting rib 15 is edged. This rotation is prevented by making strong contact with the part 51, and it does not fall off. Thereby, since the loose clamp main body 10 can maintain an open state stably, an inside inspection and a dimension check can be performed safely and quickly.

  As described above, according to the present invention, it is possible to provide a loose clamp of a loose spacer that can prevent the loose clamp from being detached during inspection.

DESCRIPTION OF SYMBOLS 10 Loose clamp main body 15 SP lock attachment rib 17 Latching rib 20 Loose metal fitting 30 SP lock 40 Clevis 50 Detachment prevention part 51 Edge part 52 Detachment prevention main body 54 Spring hinge 56 Fixing part 58 Hole 100 Loose clamp of this invention

Claims (2)

A loose clamp of a loose spacer disposed on an overhead power transmission line,
A hinge structure loose clamp body comprising a rib to which an SP lock is attached and a rib to which the SP lock is hooked;
A loose metal fitting attached to the clevis on the loose spacer side;
A separation preventing part attached to the clevis;
When the loose clamp body is fitted to the loose metal fitting while grasping the overhead power transmission line and fixed by the SP lock 30, the SP lock is attached when the detachment preventing portion is fixed to the clevis. A loose clamp of a loose spacer, wherein the rib and the edge portion of the separation preventing portion are fixed in contact with each other. The loose clamp detachment prevention part of the loose spacer is
A detachment prevention main body, a fixing portion fixed to the clevis, and a spring hinge connecting the detachment prevention main body and the fixing portion;
The one end of the detachment prevention main body has an edge portion that becomes a portion that comes into contact with the rib, and the other end side has a hole for avoiding a bolt with a clevis attached thereto. Loose clamp of the described loose spacer.

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