JPH0424921B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a safe used when extending power transmission lines.

(Prior technology) Conventionally, in the work of replacing old electric wires with new electric wires, the upper roller of a safe with two wire insertion openings is suspended from the old electric wire at regular intervals with a connecting rope between one steel tower, and the lower roller The new wire is placed on top of the new wire and pulled from one side using a self-propelled machine or a pull rope. After reaching the other side, the new wire is temporarily secured on the lower roller in the new wire insertion opening, and the new wire is tensioned. At the same time, the old and new wires are loosened, the positions of the old and new wires are reversed, the old wires are pulled out, and the old and new wires are replaced.

Also, when installing new electric wires, the same work procedure was followed, and the old wires from the above process were used as the main ropes.

(Problem to be solved by the invention) However, the use of this construction method is different from the previously developed drawing construction method, in which the new wire is connected to the end of the old wire or main rope and the wire is extended through a pulley. Although problems such as sagging and sagging of the new line that were observed can be solved, it is best to construct the construction section between one steel tower, and the same procedure must be followed for each span, which is inefficient. In addition, since there are many opportunities for new lines to pass through the pulleys, there are many opportunities for new lines to pass through the pulleys, which often causes problems such as knitting on new lines. The work left many problems.

Therefore, in the present invention, in order to make it possible to reline the line over multiple spans at once without causing any obstruction to the new line, the tower support points of the old line or main rope are held in the transit safe of the present invention. However, once the carrier for holding the new line that has slid on the old line or the main cable passes through the transit vault, it will be possible to extend the line to the next span. By installing this passing safe at the line or main rope support point and moving the new line while holding it on the carrier, the line can be extended all at once without causing any obstruction to the new line over the entire length of the specified span. This makes it possible.

(Operations and Examples) The passage safe A of the present application supports the old line or the main cable GS in the safe, and the third and fourth lines sliding on it
As shown in the figure, it has a rotary plate 21 that receives and sends out both frames 10 of a carrier B for holding a new line. A predetermined number of insertion grooves 1 open to the rotary plate 21 are provided, and the rotary plate 2
A rotary body 2 is constructed by holding two sheets of the rotor 1 at a predetermined interval and fixing the center of each rotatably to a shaft 4. Further, when fixing the shaft 4, a mounting member 91 is provided at the upper part, and a frame 9 bridging the roller 92 at the lower end is simultaneously fixed to the shaft 4. A bearing 61 is fixed as a sliding holding part 6 on each side 11 sandwiched between the fitting grooves 1 on the opposing concentric edges of each rotary plate 21, and the bearing 61 facing between both rotary plates 21 The guide body 5 is freely movably held in a slidably sandwiched manner. The guide body 5 has arc-shaped bearing holding grooves 51 on both sides for holding a bearing 61 disposed on the circumference of the rotary plate 21, a carrier passing track 52 with a convex cross section on the upper surface, and a lower surface. A groove is disposed in the vertical direction, and a predetermined number of wire gripping rollers 53 are removably fitted into the grooves with shaft locks 54, thereby forming a wire holding portion 55. Further, the length of each bearing holding groove 51 is set to be such that three adjacent bearings 61 on the rotary plate 21 can be held at the same time.

On the line holding roller 53 of the line holding part 55 in the guide body 5 of the passing wheel having the above configuration, the old line or main rope GS of the extended line span is suspended from the arms of the steel tower T, etc.
The frame 10 of the carrier B that has slid on the old line or the main rope GS enters the insertion groove 1 of the rotary plate 21, the roller 12 rides on the carrier passage track 52 on the guide body 5, and the carrier By being pulled, the rotating body 2 pushed by the frame 10 rotates, and the carrier B is pushed out from the rotating body 2.

At this time, the guide body 5 is inserted into its bearing holding groove 51.
It holds the bearing 61 of the rotating body 2 inside, so it does not come off, does not move with the rotation of the rotating body 2, and maintains the gravity position. Subsequent carriers B also pass by holding the new line OP in this manner, and when the first carrier B reaches the end of the extended track span, the new line OP passes.
After temporarily fixing both ends of the old line or main rope GS to the steel towers T at both ends of the construction span, both lines are reversed by tensioning the new line OP and loosening the tension on the old line or main rope GS. After that, the new line OP whose vertical position is reversed is held again in the guide body 5, and the carriage B whose vertical position is reversed is slid on the new line OP, and the old line or the main line is moved. The line extension ends when the cable GS is pulled out.

(Effects of the Invention) By using the transit safe of the present application as described above, it is possible to improve the many inefficiencies found in conventional construction methods, and to prevent damage to the electric wires, to extend new lines, or to extend old and new lines. This makes it possible to rewire lines across multiple spans all at once. When using the transit safe of the present invention which has the above-mentioned effects to construct new optical fiber lines or re-cover optical fiber lines, which will likely be seen frequently in the near future, it is extremely important to avoid twisting due to excessive contact with metal wheels, etc. Due to the nature of optical fibers, it can be expected to be particularly effective.

[Brief explanation of drawings]

Figure 1 is a partially cutaway left side view of the passing metal wheel, Figure 2 is its front view, Figure 3 is a left side view of the carrier passing through, Figure 4 is its front view, and Figure 5 is in use. State explanatory diagram Codes in the figure: 1 is a fitting groove, 2 is a rotating body, 21 is a rotating plate, 4 is a shaft stop, 5 is a guide body, 51 is a bearing holding groove, 52 is a carrier passage track, 53 is a line grip roller, 54 is a shaft stop, 55 is a wire holding part, 6 is a sliding holding part, 61 is a bearing, 9 is a frame, 91 is a mounting member,
92 is a roller A is a passing wheel, B is a carrier, 10 is a frame, GS is a main cable, OP is a new line, and T is a steel tower.

Claims (1)

[Claims] 1 A predetermined number of fitting grooves 1 are provided in a frame having a mounting member on the upper part and are opened radially toward the circumference from near the center of a circular plate material to form a rotating plate 21,
It has a rotary body 2 in which two of the rotary plates 21 are held at a predetermined interval and each is rotatably fixed at its center with a shaft 4,
A bearing 61 is provided as a sliding holding part 6 on the side 11 sandwiched between the fitting grooves on the concentric edges of the facing surfaces of each rotary plate 21, and between the bearings 61, an arc-shaped A guide having a bearing holding groove 51, a carrier passing track 52 on the upper surface through which the rollers 12 of the carrier B pass, and a groove on the lower surface serving as a line holding part 55 closed with a line holding roller 53 that can be freely fitted and removed. A passing gold wheel characterized by holding a body 5 freely.