JPH035123B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an overhead wire tensioning method and an improvement of a hanging wheel used in the method.

(Prior art) A method called the so-called hanging metal method, which uses a hanging wheel, has traditionally been frequently used when installing or replacing overhead lines, that is, ground wires and power lines that are stretched between steel towers. .

This hanging method, which will be explained in detail later, involves suspending a large number of hanging wheels from a rope at appropriate intervals, and sending out a new power line through the hanging wheels. In the construction method, when the overhead wire to be constructed is thick, the rope may be used in two sections. The invention particularly relates to a hanging method using two ropes as described above.

As a conventional hanging method using two ropes, the method described in Japanese Patent Publication No. 58-31811 is generally widely used. In the conventional method including the technique described in the publication, both ends of each of the two ropes are fixed to the steel tower. However, when fixing each of the two ropes to the steel tower, each rope has a separate fixing support point, which not only makes it difficult to obtain the desired parallelism, but also makes it difficult for the tension of each rope to become uniform. The work was extremely complicated due to the metal wheels tipping and falling over. The invention described in the above-mentioned Japanese Patent Publication No. 51-31811 was an attempt to solve these problems by using the structure of a metal wheel. By providing a wire insertion opening, the overhead wire is always kept level with one of the pulley surfaces even when the hanging wheel is tilted.

(Problem to be solved by the invention) This invention was proposed not only to improve the simple metal wheel structure as described above, but also to fundamentally improve the problems in this type of multi-rope hanging method. It is something.

In other words, this invention discovered that the drawback of the conventional method was that it was not possible to maintain the tension of the two ropes uniformly, and stretched the old line onto the new line while maintaining the tension of the two ropes uniformly. This paper proposes a simple method that can be used to convert The present invention provides a novel method that facilitates rope tension management, prevents the metal wheel from tipping or falling over, and contributes to improved work efficiency and safety.

(Means for Solving the Problems) The first invention disclosed herein is such that two ropes are erected along the old line using a hanging wheel, and then the old line is pulled out and replaced with a new line. In the method, one end of the two ropes is formed into a loop part, the loop part is held by a pulley, and the hanging wheel is fixedly held to one of the ropes. The present invention relates to a method for stretching an overhead wire, characterized in that the other rope is held so as to be able to pass through the other rope.

Further, a second invention relates to the structure of the hanging wheel used in the first invention, and includes a running pulley for an overhead line and a holding part for two ropes connected to the frame of the running pulley. The rope holding part is configured as a rope fixing part that fixes and holds one rope to the metal wheel body, and as a rope insertion part that holds the other rope so as to be penetrable. Pertains to overhead wire hanging cars.

(Examples) The present invention will be specifically described below according to examples shown in the attached drawings.

Figures 1 to 4 of the accompanying drawings are schematic side views showing a multi-rope hanging method according to an embodiment of the present invention in the order shown in the figures, and Figure 1 shows a state in which the rope is stretched along the old line. , Figure 2 shows a state in which one end of two ropes is formed into a loop part and the loop part is held by a pulley, and Figure 3 shows a state in which the old wire is loosened and the metal wheel is reversed. Figure 4 shows the state in which the old line is pulled out and the new line is stretched, Figure 5 is a schematic diagram showing the tensioned state of the rope, and Figure 6 is a schematic diagram of the main parts showing the holding structure at both ends of the rope. 7 is a side view showing one embodiment of the hanging wheel of the present invention, FIG. 8 is a front view thereof, and FIG. 9 is a perspective view showing a rope held by a rope stopper.

First, a method for installing overhead wires according to the present invention will be explained with reference to the drawings.

FIG. 1 and subsequent figures show the work of replacing the old ground line W1 and the new line W2 by the method of the present invention.

First, the old line W1 and the new line W2 between towers 10 and 10.
At the beginning of the exchange process, as shown in Figure 1,
Hanging wheels 30, 30... are placed at regular intervals (15 m in the example).
Two ropes 11 and 12 arranged at intervals) are pulled out by a self-propelled vehicle 19 running along the existing old line W1, and are erected in a substantially parallel state below the old line W1.

As shown in FIG. 2, the steel tower 10,
One end of the two ropes 11 and 12 stretched between the ropes 10 is formed by a loop portion 13, and the loop portion 13 is held by a pulley 20.

Note that, at this time, it is desirable for the loop portion 13 to be formed of a member having high strength, such as the chain 14, from the viewpoint of operation and strength.

By holding the two ropes 11 and 12 in this manner, the tensions applied to both ropes are equalized through the loop portion. Also, when tensioning or loosening the rope, the loop portion 13
This can be done on the loop support section 15 on the opposite side.

Two ropes 11 and 12 are connected to the steel tower 1 with constant tension.
After fixing and constructing between 0 and 0, the old wire W1 is loosened as shown in FIG. When the old line W1 is loosened, the hanging wheel 30 is reversed due to its gravity, and the top and bottom are reversed.
The ropes 12 and 11 are arranged on the upper side, and the old line W1 is arranged on the lower side.

Then, in this state, as shown in Figure 4,
Connect the new line W2 to the rear end W0 of the old line W1, and
If you pull out in the direction of the arrow, the old line W1 will be replaced by the new line W2.

After the re-trailing to the new line W2 is completed, the new line W2 is tightened in the opposite direction, the rope is loosened, and the top and bottom of the hanging wheel 10 are turned upside down again, and then the rope is pulled back and the hanging wheel 10 is turned upside down. Both the car and the vehicle will be recovered.

FIG. 5 is a schematic explanatory diagram showing the case where the ropes 11 and 12 are tensioned in the above example. As shown in the figure, in the present invention, one end of the two ropes is connected to the loop part 13. is formed and this is the pulley 2
0, by tensioning either one of the two ropes 11, 12, the two ropes can be tensioned at a uniform tension. Of course, two ropes 1
Both 1 and 12 may be tensioned.

FIG. 6 shows the structure of both ends of the ropes 11 and 12. A pulley 20 holding a loop portion 13 consisting of a chain 14 is rotatably attached to a steel tower via a swivel 21. Further, the loop support section 15 on the opposite side is connected to each rope 1 through a plate-shaped support member 22 which is rotatably attached to the steel tower by a rotating grip 23.
1 and 12 are connected to a wire tensioning machine 24.

It is of course possible to use a conventional gold wheel in the method described above. In other words, the present invention has the great advantage of making it easy to manage the tension of two ropes even if the conventional metal wheel is used.

However, it is even more desirable to implement this method using a metal wheel having a certain configuration.

That is, one end of the two ropes 11 and 12 is formed into a loop part 13 by the method described above, and the loop part 13 is held by the pulley 20, and the hanging wheel 30 is One of the ropes holds it fixedly, and the other rope holds it so that it can pass through it.

By adopting such a configuration, for example, as is clear from FIGS. 5 and 6, even when only one side 11 of the rope is tensioned or relaxed,
The metal wheel 30 can be smoothly moved along the two ropes without tilting or falling over, making it much easier to maintain a stable posture of the metal wheel and manage the tension of the rope.

A specific example of the hanging wheel 30 having such a configuration is illustrated in FIGS. 7 and 8. This hanging wheel 3
0 is composed of a running pulley 40 for the overhead line and a holding part 50 for two ropes connected to the frame 45 of the running pulley.

A constriction 41 or a groove is formed in the center of the body of the traveling pulley 40 so that the traveling pulley 40 does not come off the overhead wire W while traveling. Reference numeral 42 denotes a rotation axis of the traveling pulley, which can be formed integrally with a frame 45 as shown in the figure.

The side frame 46 of the frame 45 of the traveling pulley is configured to be openable and closable about one end as a fulcrum, as shown by the chain line in FIG. 1, in order to insert the overhead wire W therein. Reference numeral 47 indicates a hook portion provided at the tip of the side frame 46;
Reference numeral 8 designates a stopper member attached to the rotating shaft 42 of the traveling pulley, and a spring is elastically loaded inside. Reference numeral 49 designates a retaining screw provided on the rear side of the spring.

The rope holding part 50 is composed of a rope fixing part 51 that fixes and holds one rope to the metal wheel body, and a rope insertion part 60 that holds the other rope so as to be penetrable therethrough.

The rope fixing part 51 of the embodiment has a coil shape as shown in FIG. 1 so that the rope bent and fixed in the bending groove 71 of the rope stopper 70 as shown in FIG. 9 can be inserted and fixed from the horizontal groove. 52
is formed. In the figure, reference numeral 55 is a stopper holding space. In FIG. 9, reference numeral 75 indicates a clip pin for preventing the rope from coming off.

As in the embodiment, by using the rotatable rope stopper 70 in the rope fixing part 51, the metal wheels 30 can be arranged at regular intervals on the rope, and when the rope is twisted, Since the rope stopper rotates together with the rope at the rope fixing part, the twist of the rope can be naturally released. Therefore, there is a great advantage that shaking of the metal wheel 30 or unnatural reversal caused by the twisting of the rope can be prevented.

As shown in the figure, the rope insertion section 60 is provided with two rollers 62 and 63 at the top and bottom within a substantially box-shaped frame 61. Reference numerals 64 and 65 are rotation axes of each roller. In addition, in this rope insertion part 60, in the same way as described in the above-mentioned traveling pulley 40, in order to insert the rope into the inside thereof, the side frame 66 of the frame 61 has one end as shown by the chain line in FIG. It is constructed so that it can be opened and closed using the fulcrum as a fulcrum. Reference numeral 67 is a hook portion at the tip of the side frame 66, reference numeral 68 is a stopper member elastically loaded with a spring, and reference numeral 69 is a retaining screw.

In the figure, reference numeral 80 indicates a hinge part, and in the metal wheel 30 of the embodiment, the rope holding part 50 is connected to the traveling pulley 40.
The rope holding part 50 is connected to the frame 45 so as to be freely bent, and the rope holding part 50 is configured to be able to be bent left and right with respect to the length direction of the rope as shown by the chain line in FIG. 8 by means of the hinge part 80. has been done. By configuring the rope holding part 50 so that it can be bent left and right with respect to the length of the rope, it is possible to prevent the metal wheel from inclining significantly or even when the metal wheel is exposed to strong cross winds in the air. It has the advantage of being able to prevent falls and effectively reversing the gold wheel by tensioning and relaxing the rope.

Reference numeral 85 is a connecting rope hook for connecting a plurality of hanging wheels, and when the three upper, middle, and lower power lines are rewired, this hook 85 is used to connect other hanging wheels (groups).
are concatenated.

(Effects) As illustrated and explained above, according to the first invention, the method involves erecting two ropes along the old line using a hanging wheel, then pulling out the old line and replacing it with a new line. Various drawbacks of the conventional method of fixing the two ropes separately by forming one end of the two ropes with a loop and holding the loop with a pulley, In other words, it has become possible to fundamentally eliminate disadvantages such as irregularities in the posture of the metal wheel caused by the difficulty of uniform tension management, and decreased work efficiency due to the complexity of tension management.

In addition to the above advantages, the hanging wheel is fixedly held to one of the ropes and held to the other rope so as to be able to pass through the rope. The tension and relaxation of the metal wheel can now be easily and efficiently carried out, and the metal wheel can now be moved smoothly.

Furthermore, the hanging wheel according to the second invention comprises a running pulley for an overhead line and a holding part for two ropes connected to the frame of the running pulley,
The rope holding section is characterized in that it is configured as a rope fixing section that holds one rope fixedly to the metal wheel body and a rope insertion section that holds the other rope so that it can pass through it. We were able to provide something extremely useful for use in the multi-rope hanging method.

[Brief explanation of the drawing]

Figures 1 to 4 are schematic side views showing the multi-rope hanging method according to an embodiment of the present invention in the order shown in the figures.
The figure shows a state in which one end of two ropes is formed by a loop part, and the loop part is held by a pulley.
Figure 3 shows the state where the old line has been loosened and the gold wheel has been reversed, and the 4th
The figures each show the state in which the old line is pulled out and the new line is stretched, Figure 5 is a schematic diagram showing the tensioned state of the rope, Figure 6 is a schematic diagram of the main parts showing the holding structure at both ends of the rope, FIG. 7 is a side view showing an embodiment of the hanging wheel of the present invention, FIG. 8 is a front view thereof, and FIG. 9 is a perspective view showing a rope held by a rope stopper. 11, 12... Rope, 13... Loop part, 1
4...Chain, 15...Rope holding section, 20...
...Pulley, 30... Hanging wheel, 40... Traveling pulley, 5
0... Rope holding part, 51... Rope fixing part, 6
0... Rope insertion portion, W, W1, W2... Overhead wire (ground wire).

Claims (1)

[Scope of Claims] 1. In a method in which two ropes are erected along an old line using a hanging wheel, the old line is pulled out and replaced with a new line, one end of the two ropes is The rope is formed by a loop portion, and the loop portion is held by a pulley, and the hanging wheel is fixedly held to one of the ropes, and held to the other rope so as to be able to pass through it. An overhead wire installation method characterized by the following. 2. Consists of a running pulley for the overhead line and a holding part for two ropes connected to the frame of the running pulley, and the rope holding part fixes and holds one of the ropes to the metal wheel body. A hanging wheel for an overhead line, characterized in that it is configured as a rope fixing part and as a rope insertion part that holds the other rope so as to be penetrable.