JPH0321134Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a twist preventer used to prevent a cable from twisting when the cable is strung or removed by a hanging wire.

[Prior art]

Conventionally, cables supported by hanging wires have been laid using the following procedure.

(1) Attach a metal wheel to the cable spanning position of the utility pole.

(2) Pass the tow rope through the gold wheel.

(3) Tie a suspension line to one end of the rope, pull the other end, and pass the suspension line through the metal wheel.

(4) After the suspension line has been routed through the entire span section,
One end of the suspension line is fixed to the utility pole with a maki-guri, and the other end is stretched to a predetermined degree of slack using a simmerer, etc., and then fixed with a maki-guri.

(5) Fix the hanging wire to the middle pillar using the hanging bracket.

(6) Attach metal wheels to the suspension wire at regular intervals and pass the towline through the metal wheels.

(7) Tie a cable to one end of the towline, pull the towline, and pull the cable through the metal wheel.

(8) Remove the metal wheel while fixing the cable to the hanging wire with a cable ring.

(9) Attach a box such as a connection end box.

(10) Connect the new cables to each other.

(11) Make connections between the new cable and the existing cable.

All of the above work procedures are performed on the pillar, especially
Works (7) and (8) are often performed using aerial devices, which are dangerous and inefficient.

Therefore, ladder trucks, latching machines, etc. have been developed to eliminate these drawbacks, but ladder trucks have the disadvantage that the work range is limited, and latching machines cannot handle latching wires or hanging wires. It has the disadvantage that it can cut.

On the other hand, moving the work place from the poles to the ground increases safety and improves work efficiency.
It is also possible to perform the operations (1) to (10) above at a height of about 1.2 m, and then pull it up to a predetermined position and fix it.

However, when the cable was pulled up using this method, there was a drawback that the cable would be twisted. In other words, when a suspension line and a cable are strung together at a height of 1.2m above the ground, the suspension line is untwisted in order to be pulled with the same tension as when the suspension line was strung at a predetermined position, and when the suspension line is pulled up, the tension on the suspension line is loosened. In order to do this, a force acts to untwist the hanging wire. At this time, if the untwisting force is greater than the moment due to the weight of the hanging wire and cable, the cable will be twisted, and even if the cable is held in a predetermined position and strung,
It won't go back. As a result, it was necessary to reinstall the cable ring on the aerial vehicle.
It requires a lot of operation.

Further, when removing the hanging wires and cables, if the hanging wires and cables are removed from the utility pole together, the removal work becomes difficult due to twisting. For this reason, conventional methods of working on the ground have not been adopted.

[Purpose of invention]

The purpose of this invention is to prevent cables from twisting when lifting the suspension wires and cables that are strung around 1.2 m above the ground to a predetermined position, or when pulling them down from a predetermined position to around 1.2 m above the ground and removing them. An object of the present invention is to provide an anti-twist device.

[Structure of the idea]

The present invention is a torsion preventer for preventing twisting of a hanging wire that spans a cable, and includes a gripping part that grips the hanging wire in an unrotatable manner, a rod attached to the gripping part, and the gripping part of the rod. It consists of a wire part and a weight attached to the opposite side.

〔Example〕

Examples of the present invention will be described below. 1st
The figure shows a first embodiment of the twist preventer. Reference numeral 1 denotes a wire gripping portion for gripping a hanging wire, and it is composed of a frame-shaped upper wire gripping portion 11 and a lower wire gripping portion 12 that loosely fits into the upper wire gripping portion 11, and the lower wire gripping portion 12 is wedge-shaped. By moving it in the direction of arrow a in FIG. 1, the distance between the groove 12a formed on the upper surface and the groove 11a formed on the upper line portion 11 becomes narrower.

Therefore, by fitting the suspension wire between the grooves 11a and 12a and then moving the lower gripping portion 12 in the direction of the arrow a, the suspension wire can be gripped in a non-rotatable manner. Note that the grooves 11a and 12a have a semicircular cross section, and a linear depression is carved in the groove in the direction along the groove, so that the hanging wire held in the groove can be held inside. Prevents it from rotating.

A side groove 12b is formed in the lower gripping portion 12, and the tip of a bolt 13 screwed into the side surface of the lower frame portion 11b of the upper gripping portion 11 comes into pressure contact with the groove 12b. It is designed to prevent the wire from slipping out and maintain the state in which the wire is gripped.

2 is a rod fixed to the lower surface of the upper gripping line part 11;
3 is a weight attached to the lower end of the rod 2.

The following describes the procedure for wiring cables using this twist preventer.

(a) First, temporarily span the suspension line at a height of approximately 1.2m above the ground.

(b) Install the above-mentioned torsion preventer on the suspension line near the pillar in a position that does not interfere with the installation of the terminal box.

(c) Attach metal wheels to the hanging wire at regular intervals.

(d) Run the cable through the metal wheel.

(e) Remove the metal wheel while attaching the cable to the hanging wire with a cable ring.

(f) Attach boxes such as connection terminal boxes.

(g) Connect new cables to each other.

(h) Remove the temporary fixing of the suspension line, hoist the suspension line using a pulley, etc., and secure it by applying the specified tension.

(i) Remove the twist preventer mentioned above.

(j) Connect new cables and existing cables.

When cables are straddled using twist preventers as described above, the hanging wires and cables are prevented from twisting, so there is no need to correct the final strung condition, and the work in (a) to (g) Even if this is done on the ground, there will be no problem, improving work efficiency and safety.

Experiments showed that compared to the conventional method, the work time was reduced by half, and the finished product was the same as the conventional method.

In addition, by using the above-mentioned anti-twist device during the work of removing the hanging wires and cables and performing the work in the reverse order to that during the construction, efficiency and safety can be improved in the same way as in the construction work.

Furthermore, this twist preventer can be used when installing self-supporting cables, making it possible to work on the ground and improving work efficiency.

FIG. 2 shows a second embodiment of the twist preventer. In this embodiment, an internal thread is formed in the lower piece 41b of the upper gripping part 41 of the gripping part 4, a bolt 43 having a grip 42 is screwed therein, and the tip of the bolt 43 is inserted into the lower gripping part 44. It is pivoted into a hole provided. 41a and 44a are grooves similar to the grooves 11a and 12a described above, and 45 is a bolt for fixing the bolt 43.

In this embodiment, when the grip 42 is rotated, the lower wire gripping portion 44 moves in the direction of arrow b, so that the hanging wire inserted between the grooves 41a and 44a can be gripped without rotation.

FIG. 3 shows a third embodiment of the twist preventer. In this embodiment, the gripping part 5 is composed of an upper gripping part 51 and a lower gripping part 52, and grooves 51a and 52a are formed in both of them.
It is similar to the previous embodiment in that the hanging wire is gripped unrotatably between the upper wire gripping portions 51 and 2a.
A female thread is formed in the lower piece 51b, into which a bolt 21 integrated with the tip of the rod 2 is screwed, and the tip of the bolt 21 is pivotally connected to the lower gripping wire part 52.
53 is a bolt for fixing the bolt 21.

Therefore, in this embodiment, when the weight 3 is used as a grip and rotated, the lower gripping wire portion 52 moves in the direction of arrow c, and grips the hanging wires running along the grooves 51a and 52a in an unrotatable manner. can hold.

FIG. 4 shows a twist preventer according to a fourth embodiment. In this embodiment, the gripping part 6 is composed of an upper gripping part 61 and a wedge-shaped lower gripping part 62 that fits into the guide part 61b of the upper gripping part 61, and a groove is formed so as to face both of them. 61a, 62a are formed,
A long hole 61 formed in the lower piece 61c of the upper gripping line part 61
d, a bolt 22 provided perpendicularly to the rod 2 is inserted, and the bent portion 23 at the tip of the rod 2 is fitted into the hole 62b of the lower gripping wire portion 62. bolt 22
A nut (not shown) is screwed onto the tip of the holder to enable tightening.

In this embodiment, when the weight 3 is used as a grip and is rotated in the direction of the arrow d, the lower gripping portion 62 is moved as shown by the arrow e.
It is possible to move in the direction and grip the hanging wire unrotatably between the grooves 61a and 62a.

FIG. 5 shows a twist preventer according to a fifth embodiment. In this embodiment, the gripping part 7 is composed of an L-shaped upper gripping part 71 and a lower gripping part 72, and the lower gripping part 72 is attached to a shaft 73 protruding from the upper gripping part 71. It is provided by a bolt 74 on the upper part of the pivoted handle bar 8. The tip of this mandrel 73 has a diameter that is large enough to prevent the handle bar 8 from coming off. 71a and 72a are opposing grooves. Further, a ratchet tooth 71b is formed on the lower surface of the upper gripping line portion 71, and a pawl of a pawl body 9 pivotally attached to the handle bar 8 engages therein.

In this embodiment, when the handle bar 8 is moved in the direction of the arrow f, the handle bar 8 rotates around the shaft 73, so the lower gripping portion 72 moves in the direction of the arrow g, and the groove 71a, It is possible to grip and hold the hanging wire inserted between 72a in a non-rotatable manner.

The claw body 9 has ratchet teeth 71b by a spring.
This restricts the return of rotation of the handle bar 8 in the direction opposite to the arrow f, but this restriction can be released by disengaging the claw body 9 and the ratchet teeth 72b. I can do it.

[Effect of idea]

As described above, in the torsion preventer of the present invention, the gripping part is pulled in the hanging direction by the weight, and the hanging wire, etc. gripped by the gripping part is held in an unrotatable state, so that it can be used near the ground. The work can be carried out in a state where twisting of the suspension wire is prevented, and therefore the work time can be significantly shortened, and the safety of the work can also be greatly improved.

[Brief explanation of drawings]

1 to 5 are perspective views of first to fifth embodiments of the twist preventer of the present invention. 1, 4, 5, 6, 7...grip line part, 2...rod, 3
...Weight, 8...Handle bar.

Claims (1)

[Claims for Utility Model Registration] A torsion preventer for preventing twisting of a hanging wire that spans a cable, comprising: a gripping part that grips the hanging wire in an unrotatable manner; a rod attached to the gripping part; A torsion preventer comprising a weight attached to the opposite side of the rod to the gripping portion.