JPS61112510A - Safe for re-stretching aerial line - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improved metal wheel used for relining overhead lines such as power transmission lines.

[Conventional technology]

As shown in Figure 3, one of the well-known overhead line re-covering methods is
Two sets of parallel rollers 1.1' with their orientations changed by 90° are attached to an outer frame 2, one of which opens and closes with one roller for taking in and taking out the overhead line A, and connecting ropes are attached to both sides of the outer frame. There is a method of using a cross-shaped metal wheel 5 to which a fixing fitting 4 of No. 3 is attached. The construction method is specifically illustrated using an overhead power transmission line as an example, as shown in FIGS. 4 and 5.

The work procedure in this case is as shown in Figure 4.
A cross metal wheel 5 connected equidistantly with two connecting ropes 3 is pulled by a self-propelled machine 7 and suspended from the old line A stretched between them.

Next, as shown in Fig. 5, the connecting rope 3 is tensioned and fixed to the steel towers 6.6 at both ends, and then the old line is loosened and supported by the cross wheel 5, and in this state, the end of the old line is New line A'
Connect it and pull it out forward. Also, when the new line reaches the steel tower 6.6, tension is applied to the wire and both ends are held by the steel tower.

After this, the remaining gold wheel is pulled in the opposite direction to the one shown in Figure 4 when it was suspended using a connecting rope, and it is removed by running on the new line.

The above is the conventional method for replacing overhead wires using cross-shaped metal wheels, but this method has the following drawbacks.

[Problem that the invention seeks to solve]

The disadvantage is that the connecting rope of the gold wheel is fixed to the outer frame in close proximity to the replacement line, so when the cross gold wheel runs on the old line, and when the new line passes inside the metal car, it is not connected to the support point. The distance to the center of gravity is too close, causing the metal wheel to lose its balance and tilt, resulting in a large load being applied to the connecting rope on one side. This imbalance is caused by the poor stability of the metal wheel itself, which has its center of gravity in the center and has vertical rollers on either side of the horizontal roller, which can lead to kinks in the wires and connecting ropes. ing.

Therefore, the present invention aims to provide a metal wheel that is stable in a suspended state.

[Means for solving problems]

The metal wheel of the present invention, which eliminates the above-mentioned drawbacks, reduces the weight of the metal wheel on the left and right sides of the center of gravity by omitting the left and right vertical rollers.
Among the rollers, the weight of the lower roller is greater than that of the upper roller to lower the center of gravity, and furthermore, it can slide up and down with a guide member fixed to the outer surface of the connecting rope fixing fittings attached to the outer surface of each of the opposing side walls. By supporting the connecting rope, the direction in which the center of gravity of the connecting rope descends is directed away from the line receiving the upper roller or the line supporting the lower roller, thereby increasing stability.

〔Example〕

A more detailed structure and operation of the present invention will be explained based on the embodiments shown in FIGS. 1 and 2.

As shown in the figure, the vertically elongated outer frame 10 has an upper frame 11 and a lower frame 12 which are molded separately, and an opposing side wall 13.13.
are connected via a hinge part 14 provided on one side and a hinge part 15 provided on the other side, and the stopper 16 of the other hinge part 15 is removable. The lower frame 12 is rotated around , and the overhead wires are inserted into and removed from the inside.

An upper roller 17 is horizontally suspended between the opposing side walls of the upper frame 11, while a lower roller 18 having a larger diameter and heavier weight than the upper roller is horizontally suspended between the opposing side walls of the lower frame 12. . Furthermore, guide rods 19 and 19 are fixed to the outer surfaces of the side walls of the upper frame and the lower frame, which are thicker in height than the opposite wall and face each other in the middle, and extend vertically at the same height position. , the fixing fittings 20, 20 of the connecting rope 3 are slidably attached to both of them.

In addition, an aluminum plate 21 is installed on the inner surface of the side wall to which the guide rod is attached to protect overhead wires that may come into contact with that surface.
This aluminum plate can be installed as required.

In addition, the retaining pin 16 of the hinge portion 15 is provided with a groove 22 at its tip in order to prevent it from being pulled out and speed up the removal work, and a wire spring 23 supported by the outer frame is locked in the groove. The retaining pin may be prevented from being removed using a screwdriver pin or a nand, and the hinge portion 15 itself may also be connected using other connection structures such as screws.

The usage of the gold wheel consisting of the above is the same as the cross gold wheel. However, since the weight of the lower roller is greater than that of the upper roller, the center of gravity is lower, and when the upper roller runs on the old line A or the new line A', the connecting rope 3 is moved together with the fixing bracket 20 by its own weight to the guide rod. Located at the lower end of 19,
On the other hand, when the new and old wires are supported by the lower rollers 18 and pulled out, tension is applied to the connecting rope 3, so the rope rises together with the metal fitting 20 to the upper end of the rod 19, and in this way, when in use, the entire center of gravity is always shifted from the support point. Since it moves further downward, it is very stable and does not tilt.

〔effect〕

As described above, the metal wheel of the present invention has the weight of the lower roller larger than the upper roller to place the center of gravity below the center point, eliminates the conventional vertical roller, and improves the stability of the metal wheel itself. By supporting the fixing metal fittings of the connecting ropes so that they can slide up and down, the center of gravity is further lowered and stability is improved in practical use. There is no possibility of inconvenient situations such as twisted lines.

The metal wheel of the present invention is mainly used for re-strapping overhead wires, but it is not impossible to use it for the hanging metal construction method at the time of new construction.

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of the gold wheel of the present invention, FIG. 2 is a perspective view thereof, FIG. 3 is a perspective view showing a conventional cross gold wheel in use, and FIGS. 4 and 5 are FIG. 2 is a diagram illustrating a method for relining overhead power transmission lines using a cross-shaped metal wheel. DESCRIPTION OF SYMBOLS 10... Outer frame, 11... Upper frame, 12... Lower frame, 13... Side wall, 14... Hinge part, 15
...Removable hinge part, 16... Fixing pin, 17
... Upper roller, 18... Lower roller, 19...
Guide rod, 20...Fixing bracket Patent applicant Sumitomo Electric Industries Co., Ltd. Agent Kama 1) Text 2 Written amendment (voluntary) June 19, 1985

Claims (1)

[Claims] It has a hinge part on one side of the opposing side wall and a removable connecting part on the other side, and both of them are arranged horizontally in parallel between the vertically long outer frame between the spindles of the two rollers shown below and the opposite side wall of that frame. a suspended upper roller and a heavier lower roller;
An overhead wire re-stretching wheel comprising a connecting rope fixing fitting provided on the outer surface of each of the opposing side walls, and a guide member fixed to the side wall and slidably supporting the fixing fitting in the vertical direction. .