JPH055774Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The invention of this application relates to the extension of power transmission lines, and in particular, the invention is concerned with the extension of power transmission lines. This relates to a leading type carrier located at the front.

(Conventional technology) When stretching lines such as OPGW that require consideration of excessive tension and twisting during line stretching, the line is held at the bottom of a carrier and stretched between the steel towers in the span of the line. The carrier cableway construction method is used, in which the carrier is suspended from a support line and moved over the support line support fittings of the intermediate tower. As shown in Figure 7, the carrier used in this construction method has a radial fitting groove opened from the center toward the circumference, and a sliding holding part concentrically attached to the edge of each side sandwiched by the fitting groove. The sliding holding parts of two rotating plates facing each other,
Two guide bodies are sandwiched between them, and the center of both rotary plates is fixed to the shaft.One of the guide bodies is used for mounting the support line, and the other is used for holding the OPGW. Ta. The above-mentioned carriers were connected at predetermined intervals by connecting ropes to form a carrier group, and a counterweight was hung from the tip of the carrier group as a leading type carrier to control the attitude of the following carrier group. .

(Problem to be solved by the invention) However, when the leading type of carrier of a group of carriers mounted on a support line and pulled by a tow rope reaches the support metal fitting of the support line, the guide body at the lower position There were cases where it came into contact with the support metal fittings, causing problems in its passage.

As shown in Fig. 7, the leading type carrier of the carrier group has a counterweight for attitude control suspended from the guide body at the bottom. Conventionally, this counterweight was suspended from the center of the guide body. Ta. An included angle was formed at the position of the support fitting on the support line, and the leading type carrier always entered the support fitting at an upward slope. As a result, the counterweight hangs in the direction of gravity and cannot maintain parallelism with the upper guide body resting on the uphill support line. Contact with the connected rope receiving roller shaft, etc.
Depending on the situation, it could be difficult to pass through.

(Means for solving the problem) Therefore, in the present invention, in order to make the upper and lower guide bodies of the carrier approximately parallel on the ascending slope due to the included angle of the support line near the steel tower, and to facilitate the passage of the support fittings, the lower position The guide body is provided with a guide body control plate that protrudes only obliquely upward in the direction opposite to the traveling direction, and when the tensile load is applied by connecting the tip of the OPGW held by the following carrier group to the tip of the guide body control plate, the center of the carrier Than
A force P acts in the tangential direction of the circumference whose radius is up to the connection point of the OPGW, and a force acts to rotate the guide body fitted in the concentric sliding holding part from the center of the carrier in the direction of arrow A, and the guide When the body rotates, the upper and lower guide bodies become approximately parallel. Therefore, when it reaches the supporting metal fittings of the intermediate tower, it becomes easy to pass through it.

(Embodiment) In an embodiment of the present invention, a predetermined number of fitting grooves 1 are provided radially opening toward the circumference from the vicinity of the center of a circle, and each side 2 sandwiched by the fitting grooves 1 is The sliding holding parts 3 of two rotary plates 4 and 5, each having a sliding holding part 3 concentrically provided at the edge thereof, are opposed to each other, and a cross-sectional shape corresponding to each sliding holding part 3 is provided on both sides between them. ,
Two guide bodies 7 each having a sliding collar 6 having an arc shape and having a length that always engages with two of the sides 2 of the rotary plates 4 and 5 and sometimes engages with three of the sides 2, and the sliding collars 6 correspond to each other. The center of both rotary plates 4, 5 is fixed to the shaft 11 by fitting it into the sliding holding part 3, and as the shaft 11 slides and extends, both rotary plates 4, 5, both guide bodies 7, and shaft 11
The two spaces made up of
During one contraction, both guide bodies 7 are freely rotatable regardless of the rotation of the rotary plates 4 and 5, and rollers 8 for mounting support lines are provided at both ends of one guide body 7, and the other guide body 7 is is provided with a guide body control plate 9 that protrudes only diagonally upward in the direction opposite to the traveling direction. A connecting hole 1 for connecting OPGW is provided at the tip of the protruding part of the guide body control plate 9.
0 is set.

The leading type carrier of the present invention having the above structure is mounted on a support line, the following carriers are connected, and the traction rope is wound up at the engine station to start movement.
When reaching the vicinity of the steel tower, an included angle is formed on the support line, and the carrier group ascends the support line with an upward slope, but the guide body control plate 9 of the leading type carrier protrudes obliquely upward from the carrier and its tip The tip of the OPGW is connected to the central axis 11 of the carrier, so the load is
A force P acts in the connecting direction of a circle whose radius is up to the OPGW connection point, and a force acts to rotate the guide body 7 fitted in the sliding holding part 3 on the concentric circle in the direction of arrow A, and the guide The body 7 rotates, and the upper and lower guide bodies 7 are in a substantially parallel state. Therefore, as shown in FIG. 6, when the lower guide body enters and passes through the support fitting, it does not tilt and come into contact with the connecting rope receiving roller shaft 16, causing poor passage.

It is desirable that the obliquely upward protruding angle of the guide body control plate 9 be changed as appropriate in consideration of the angle of support line inclusion in the support metal fittings of each steel tower in the wire span.

(Effects of the idea) As described above, by providing a guide body control plate on the first carrier, the passage through the support fittings of each intermediate steel tower is improved, and workers can climb up the tower to assist when passing. This eliminates the need for such equipment, thereby reducing the occurrence of fall accidents.

In addition, a guide body control board is installed on the first carrier,
By connecting the OPGW, the OPGW itself acts as a counterweight, and the passing of subsequent carrier groups is also improved, making the above-mentioned effect even more pronounced.

[Brief explanation of drawings]

Fig. 1 is a front view of the present invention, Fig. 2 is a right side view thereof, Fig. 3 is a front view of the support fitting, Fig. 4 is a right side view thereof, Fig. 5 is an explanatory diagram of the usage state, Fig. 6 is A state diagram of the proposed carrier passing through the support fittings,
FIG. 7 is a diagram showing the conventional product passing through the support fitting. Symbols in the diagram: B...Leading type carrier, H...Support metal fittings, W...Support line, RW...Connection rope, 1...
Fitting groove, 2... side, 3... sliding holding part, 4, 5...
...Rotating plate, 6...Sliding collar, 7...Guide body, 8
...Roller, 9...Guide body control board, 10...
Connecting hole, 11... shaft, 16... connecting rope receiving roller shaft.

Claims (1)

[Scope of utility model registration request] A predetermined number of fitting grooves 1 are provided radially opening toward the circumference from near the center of the circle, and a sliding holding part 3 is provided concentrically at the edge portion on each side 2 held by the fitting grooves 1.
The sliding holding parts 3 of the two rotary plates 4, 5 provided with are opposed to each other, and between them, the sides of the rotating plates 4, 5 have cross-sectional shapes corresponding to the sliding holding parts 3 on both sides, and are arc-shaped. Two guide bodies 7 each have a sliding collar 6 long enough to always engage with two of the guide members 2, and sometimes with three guide members 7, and the sliding collars 6 are fitted into the corresponding sliding holding parts 3. In a wire drawing carrier in which the centers of both rotary plates 4 and 5 are fixed to each other, and both guide bodies 7 are freely movable irrespective of the rotation of the rotary plates 4 and 5, at both ends of one guide body 7. is provided with rollers 8 for riding on the line, and the other guide body 7
A leading type carrier is provided with a guide body control plate 9 that projects obliquely upward by a predetermined length in the direction opposite to the traveling direction of the carrier, and a connecting hole 10 is provided at the tip of the guide body control plate 9.