JP2556915Y2 - Wire drawing equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire extension device for extending a new line using an existing electric wire.

[0002]

2. Description of the Related Art An apparatus used for the above purpose is disclosed in Japanese Patent Publication No. 54-1979.
7352. Carriers and a plurality of upper wheels that can be transported along the existing line, hanging ropes that are suspended from each upper wheel and that have suspension rails that can support the new line at the lower end, and each hanging rope are connected at appropriate intervals. It is a device consisting of a pull rope that stops and ties the terminal to the carrier.

[0003] When using this device, it is difficult to align the hanging wheel completely on the same straight line, and the new line has a slight curvature. For this reason, the loads applied to the plurality of hanging wheels are not always equal. One suspension wheel may be unloaded and the next one may be overloaded. In this case, the suspension wheel truck subjected to an excessive load is apt to break down, and the electric wires passing therethrough are also easily damaged on the surface. Improvement in this respect has been desired.

[0004]

Means of Solving the Problem At first glance, it is similar to a mainspring, but if the inner end is free to rotate without being fixed to the mandrel,
It is known that even if the spring deflection changes, the load hardly changes. Using this principle, the suspension rope is divided into an upper rope and a lower rope, and a balancer having the following structure is interposed between the two.

[0005] A case suspended from the upper rope, a disk provided with an outer ring inner ring and rotatably supported in the case, a thread-wound top rotatable on an axis fixed to the case, and an inner end formed by a top It has a tape-shaped spring that is wound without being locked and whose outer end is locked to the inner ring, and a lower rope that is locked to the outer ring at one end and winds the outer ring and pulls the other end out of the case. If you pull the lower rope, the inner ring rotates with the disk and winds the spring. When loosened, spring force is restored.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawing will be described with reference to an example in which a pilot rope P for towing a new line is towed below an existing electric wire E1. The carrier 1 can run by itself along the electric wire E1.
A plurality of upper wheels 2 can also be transported along the electric wire E1, each of which hangs the upper rope 3 and supports the balancer B at its lower end. The lower rope 4 has an upper end connected to the balancer B and a lower end supporting the hanging wheel 5. The suspension wheel 5 can support the pilot rope P and a new electric wire following the pilot rope P, and the tip of the pilot rope P is connected to the carrier 1. The pulling rope 6 is latched at appropriate intervals to a plurality of upper ropes,
Its tip is also retained by the carrier 1.

The balancer B keeps the load of the new electric wire applied to the hanging wheel 5 constant, and comprises a case 7, a disk 8, a top 9, a spiral spring 10, and a lower rope 11, as shown in FIGS. The case 7 has a cylindrical shape, the upper end of which is locked to the upper rope 3, and has a shaft 7a at the center. The disk 8 has an outer ring 8a and an inner ring 8
b, is open on one side, and is rotatably supported on the shaft 7a through a center hole of the inner ring. The threading top 9 is rotatably supported by a shaft core 12 implanted in the case side wall, and faces a position corresponding to the inner ring 8b. The constant load spiral spring 10 is wound around the top 9, and its inner end is not locked to the top 9, and its outer end is locked to the inner ring 8 b. One end of the lower rope 11 is an outer ring 8a
After winding the outer ring, the hole 1a at the lower end of the case
Drooped through. At its lower end is a hanging wheel 5 as described above.
Is suspended.

[0008]

FIG. 1 shows a state before the carrier starts moving. Each hanging wheel is near the tower A1, and the tow ropes 6 all hang down in a U-shape, and the tips are locked to the carrier. The pilot rope P is supported by each hanging wheel, the front end is also locked by the carrier, and a new electric wire is connected to the rear end. When the carrier 1 is started to the right in the figure, the pulling rope is pulled by the pulling rope, and the hanging wheel sequentially moves to the right.

When the carrier reaches the tower A2, the front end of the tow rope is locked to the tower A2, and the carrier is moved to the existing electric wire E2 (FIG. 2). The pilot rope P is towed through the wheel 13 of the tower A2, and a new line following the tow is transferred on the suspension wheel. At this time, the new line is smoothly transported by the action of the balancer B because the load applied to each suspension wheel is equal. When the existing line is removed in exchange for a new line, the above method is applied (Japanese Patent Publication No. 53-15353). Although FIGS. 1 and 2 show a case where the number of pieces 9 of the balancer is one, a plurality of pieces may be used. FIG. 5 shows four cases.

[0010]

[Effect] An electric wire passing over a hanger wheel is supported by each hanger wheel with an even load, and a smooth wire drawing operation can be performed.

[0011]

[Brief description of the drawings]

FIG. 1 shows the front of the present invention before starting a carrier.

FIG. 2 shows the front of the present invention after the carrier reaches the next tower.

FIG. 3 is a side view of the balancer.

FIG. 4 is a front view of the balancer.

FIG. 5 is a front view of another embodiment of the balancer.

[Explanation of symbols]

 A1, A2 Steel tower B Balancer P Pilot rope 1 Carrier 2 Upper wheel 3 Upper rope 4 Lower rope 5 Hanging wheel 6 Pulling rope 7 Case 8 Disk 8a Outer ring 8b Inner ring 9 frames 10 Spiral spring 11 Lower rope 12 Shaft core 13 Roller

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) creator Masaru Aoki 6-5-19 Minamishinagawa, Shinagawa-ku, Tokyo Sanwa Tekki Co., Ltd. (72) creator Mitsuo Hamada Tsubakicho, Nakamura-ku, Nagoya-shi, Aichi Prefecture 5-17 Sanwa Tekki Co., Ltd. Nagoya Office (56) References JP-A-61-266002 (JP, A) JP-A-2-241303 (JP, A) JP-A-61-214711 (JP, A) Kaisho 62-93532 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] 1. A carrier capable of self-propelling along an existing electric wire,
A plurality of upper wheels that can roll along the same existing electric wire, a balancer that is suspended from each upper wheel via an upper rope and has a constant load spring, and a new electric wire suspension that is suspended from the same balancer via a lower rope. A suspension wheel, comprising: a plurality of upper ropes, the plurality of upper ropes being latched one after another at appropriate intervals to a tow rope, and a terminal of the tow rope being latched to the carrier. Line equipment.