JPH0785613B2 - Transmission line transfer method and transfer guide roller used in the method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a construction method for transferring a transmission line stretched between arms of existing steel towers to new steel towers which are higher than the existing steel towers. The present invention relates to a transfer guide roller used in the method.

(Prior Art) Generally, in this type of transfer method, as shown in FIG. 4, the ground wire GW, the upper wire W1, and the middle wire W, which are respectively stretched over the arms 2A, 3A, and 4A of the existing steel towers 1A, respectively. Line W2, underline W3 (hereinafter,
Collectively referred to as power lines. ) Is sequentially transferred to each of the arms 2B, 3B, 4B on the side of the new steel tower 1B higher than the existing steel tower 1A, but in the conventional transfer method, as shown in FIG. One worker to remove the power transmission line to be transferred on the steel tower 1A, 3 people to install the transferred power line on the new steel tower 1B, and 4 people on the ground. First, the 8 workers cast the gold car 6A with the lifting wire 5A attached to the power transmission line to be transferred, then, after removing the power transmission line to be transferred on the existing steel tower 1A, The lifting wire 5A is guided to the upper part on the side of the new steel tower 1B, further connected to the winding device 7 on the ground to wind the lifting wire 5A by the winding device 7, and the power transmission line to be transferred is also lifted. Work was in progress to transfer the wires to the steel tower 1B.

(Problems to be solved by the invention) Then, the above-mentioned hoisting work is performed by, for example, the ground line GW.
When transferring the wire, the attachment point of the ground wire GW is the upper arm
The ground line GW to be transferred should be hung on the middle arm 3A and the upper arm 2A, and further on the tips of the arms 3A, 2A because it is inside the steel tower 1A rather than 2A and the middle arm 3A is long due to the offset structure. It will come into contact with the lowered insulator string (see the dotted line), and in order to prevent this, arrange one worker each on the middle arm 3B and upper arm 2B of the new steel tower, and then transfer the wire. The tiger rope 8 on the ground line GW which should be
While pulling the tiger rope 8 by connecting two workers on the ground, the ground line GW is kicked out by the worker on each of the arms 3B and 2B, and the ground line GW is connected to each of the arms 3B and 2B. I tried to avoid it from the tip.

Therefore, the above-mentioned transfer work requires at least eight workers, and the work requires considerable time and labor. Moreover, one worker is placed on each of the middle arm 3B and the upper arm 2B of the new steel tower, and the ground wire is provided.
The work of kicking out the GW had to be done, and that work was always dangerous.

Therefore, in view of the above-mentioned conventional problems, the present invention requires a minimum number of workers to significantly reduce the transfer work time and, at the same time, to transfer a transmission line that can perform the transfer work extremely completely. An object of the present invention is to provide a wire construction method and a transfer guide roller used in the construction method.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the present invention provides a power transmission line stretched between the arms of each existing steel tower to a new steel tower side higher than each existing steel tower. This is a method of transferring wires, in which a transfer guide roller is arranged at the end of the arm of a new steel tower, and after connecting a pulling rope to a part of the power transmission line to be transferred via a gold wheel, While pulling up this pulling rope sequentially on the side of the new steel tower, when pulling up the transmission line to be transferred from the side of the existing steel tower to the side of the new steel tower, the pulling rope guides the pulling operation of the pulling rope by means of the transfer guide rollers. In addition, the gist is to guide the dodging operation of the power transmission line to be transferred that passes through the end of the arm.

Further, the wire transfer guide roller used in the above-mentioned construction method comprises a bracket attachable to the end of the arm and a roller body rotatably supported by the bracket. A guide groove for guiding a pulling rope connected to a part of a power transmission line to be transferred via a gold wheel and a guide surface for guiding the power transmission line to be transferred in a stretched posture; The gist of the present invention is that a space through which the gold wheel passes is formed between the groove and the guide surface.

(Operation) According to the configuration described above, when pulling up the transmission line to be transferred from the existing steel tower side to the new steel tower side, a transfer guide roller is arranged at the arm end of the new steel tower to pull it up. It guides the pulling-up operation of the rope and guides the dodging operation of the power transmission line passing through the end of the arm to be transferred.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

First, the guide roller for wire transfer used in the construction method of the present invention will be described.

As shown in FIG. 2 and FIG. 3, the transfer guide roller 10
Is a fixed bracket 11 fixed to the lower surface of the tip of each arm 2B, 3B, 4B of the new steel tower 1B, and the fixed bracket 11
Shaft 1 installed between arms 12A and 12B protruding at the tip of
3, two first guide rollers 14, 14 rotatably supported by bearings on both ends of the support shaft 13, and bearings arranged between the first guide rollers 14, 14. Axis 13
And a second guide roller 15 having a smaller diameter than the first guide rollers 14 and 14 and rotatably supported by a bearing.

The outer peripheral guide surfaces of the first guide rollers 14 and 14 are configured to guide the power transmission line WA described later in a stretched posture, and the second guide roller 15 has a pulling rope 5A described later on substantially the center of the outer periphery thereof. A guide groove portion 16 having a substantially U-shape is formed to guide the guide wire between the outer peripheral guide surfaces of the first guide rollers 14 and the outer periphery of the second guide roller 15 and a gold wheel 6A of a pulling rope 5A described later. The void 17 is formed so that

Next, the transfer method will be described.

As shown in FIG. 1, the above-mentioned transfer guide roller 10 is attached and fixed to the lower surface of the tip end portion of each arm 2B, 3B, 4B of the new steel tower 1B via the fixing bracket 11 by bolts or the like.

And, the ground line GW, the upper line W1, the middle line W2, and the underline that are respectively stretched over the arms 2A, 3A, 4A of the existing steel towers 1A and the arms 2A, 3A, 4A of the existing steel towers 1A that are stretched between them. Transmission line WA to be transferred in W3 (collectively, transmission line WA)
The gold wheel 6A with the pulling rope 5A attached to it is flowed to guide the pulling rope 5A to the upper part of the new tower 1B side, and at the same time, the pulling rope 5A is attached to the tips of the arms 2B, 3B, 4B. Second guide roller 15 in the wire guide roller 10
Is inserted into the guide groove portion 16.

Next, after removing the transmission line WA to be transferred on the existing steel tower 1A, the pulling rope 5A is attached to the winding device 7 on the ground.
The hoisting rope 5A is successively hoisted (hoisted) by the winding device 7 in a continuous manner.

The power transmission line WA to be transferred along with the hoisting rope 5A being wound is sequentially lifted upward and transferred to the new steel tower 1B, and is placed at a predetermined site on the new steel tower 1B.

In this case, the hoisting rope 5A has a second hoisting motion.
The power transmission line WA to be transferred, which is guided by the guide groove portion 16 of the guide roller 15 and passes through the tips of the arms 2B, 3B, 4B, is the two first guide rollers 14 in the transfer guide roller 10. It is lifted and lifted while being guided by the outer peripheral guide surface 14 to perform a dodging operation of the tips of the respective arms 2B, 3B, 4B. The gold wheel 6A of the lifting rope 5A is also the first guide roller in the transfer guide roller 10.
Since it passes through the space 17 between 14, 14 and the second guide roller 15, the passage of the lifting rope 5A and the guide groove portion 16 of the second guide roller 15 is obstructed during the passage. Not a thing.

After that, as described above, each transmission line WA (ground line GW,
The upper line W1, the middle line W2, and the lower line W3) are sequentially transferred from the existing steel tower 1A side to the new steel tower 1B side.

(Effects) As described above, the present invention is a construction method of transferring lines to newly installed steel towers higher than the existing steel towers such as transmission lines stretched between the arms of the existing steel towers. Then, a guide roller for wire transfer is installed at the end of the arm of the new steel tower, and the wire pulling rope is connected to a part of the power transmission line to be wire-transferred via a gold wheel. While sequentially pulling up on the new steel tower side, when pulling up the transmission line to be transferred from the existing steel tower side to the new steel tower side, while guiding the pulling operation of the pulling rope by the transfer guide roller, the arm end By guiding the dodging action of the power transmission line that should be transferred through the section,
One worker is placed on each of the middle arm and upper arm of the new steel tower, which was conventionally done, and it does not require the work of kicking out the ground line GW and the pulling operation of the tiger rope. It is possible to carry out the work very safely by reducing the number of working workers and further shortening the working time.

Further, the wire transfer guide roller used in the above-mentioned construction method comprises a bracket attachable to the end of the arm and a roller body rotatably supported by the bracket. A guide groove for guiding a pulling rope connected to a part of a power transmission line to be transferred via a gold wheel; and a guide surface for guiding the power transmission line to be transferred in a stretched posture, and the guide Since the empty space through which the gold wheel passes is formed between the groove and the guide surface, the guide for pulling up the pulling rope and the guide for dodging movement of the power transmission line passing through the end of the arm to be transferred. And can be done effectively.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the construction method of the present invention, FIG. 2 is a plan view showing a guide roller for wire transfer including a partial break, FIG. 3 is a side view of the same, and FIG. 4 is wire transfer And FIG. 5 is an explanatory view showing the outline of the conventional construction method. 1A; existing steel tower 1B; new steel tower 2B; upper arm 3B; middle arm 4B; lower arm 5A; pulling rope 10; guide roller for transfer 14; first guide roller 15; second guide roller 16; guide groove WA ;power line

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Kenichi Tanabe 1-103, Hikiyama, Meito-ku, Nagoya, Aichi Prefecture (72) Inventor Shinji Mizukami 3-177, Hongo, Meito-ku, Nagoya, Aichi Prefecture Doris Hongo 106 (72) ) Inventor Tomio Sugimoto 3-3 Honshinmachi, Toyota City, Aichi Prefecture (72) Inventor Makoto Yamashita 1-1113 Makinosato, Meito-ku, Nagoya City, Aichi Prefecture 101 No. 101 Yamada, Sakurai Yasuku Sakurai Mitsubuchi, Komaki City, Aichi Prefecture 2350-24

Claims (2)

[Claims] 1. A method of transferring a transmission line stretched between the arms of existing steel towers to the side of each new steel tower that is higher than the existing steel towers, and transferring it to the end of the arm of the new steel tower. A guide roller for the wire is provided, and a pulling rope is connected to a part of the power transmission line to be transferred via a gold wheel. Then, the pulling rope is sequentially pulled up on the side of the new steel tower to transfer the wire. When pulling up the power transmission line from the existing steel tower side to the new steel tower side, while guiding the pulling operation of the pulling rope by the transfer guide roller, the power transmission line to be transferred that passes through the arm end part A transmission line transfer method characterized by being designed to guide dodge movements. 2. A transfer guide roller attached to an arm end portion of a new steel tower, comprising a bracket attachable to the arm end portion and a roller body rotatably supported by the bracket. The roller body has a guide groove portion that guides a pulling rope that is connected to a part of the power transmission line that is to be transferred via a gold wheel, and a guide surface that guides the power transmission line that is to be transferred in a stretched posture. A guide roller for wire transfer, characterized in that a space through which the gold wheel passes is formed between the guide groove and the guide surface.