JPS60190110A - Method of tightening linear unit - 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] "Background and Objects of the Invention" The present invention is an improved method for adjusting the slack of a wire-shaped body that is wired over a long span, such as an overhead power transmission line or a steel cable for a cableway, to the required slack. Concerning line tension methods.

An example will be explained below using a power transmission line.

Overhead power transmission lines are constructed over long spans and are installed between two towers, and when this overhead power line is installed, a so-called come-along method is used, in which the wire is grasped with a come-along and pulled to the tower. Adjustment work will be carried out on the slackness of the overhead wires. In the case of normal overhead wire spans, there are no problems caused by such tensioning work, but in river crossings as shown in Figure 1, many steel towers 1-1-1 have been constructed.
Since several thousand jolls of wires between T8 are connected at once, the length of the wire C becomes particularly long, and when it is strung, a huge load is applied to this come-along grip, which causes the steel-core aluminum stranded wire to The aluminum layer of the wire may be damaged and breakage may occur. In addition, with smooth body wires and loose wires, the come-along often comes out clean even though the wire tension is large.

In order to avoid such inconveniences, methods have been proposed, such as attaching an auxiliary device such as a PG clamp to the come-along to prevent slipping, and the come-a-one grip method, which does not use the come-along at all, but each method has its drawbacks. There are also
It cannot be said that they are always being used effectively.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to easily and organically wear a plurality of commonly used come-alongs, so that the come-along can be easily and organically carried out even in tension work where a large amount of overhead wire tension is applied. This allows the load to be shared and the wires to be strained without the risk of causing damage to the wires as described in IF:4.
The purpose of this project is to provide a method for keeping lines in place.

``Summary of the Invention'' The present invention was made with a focus on the attachment of multiple come-alongs, which had never occurred to the user in the past, and its gist is as follows: 1. In order to pull the wire body to the pedestal, adjust the slack of the wire body.In the tensioning of the wire body, multiple come-alongs are attached to the wire body to be strained, and each A pulley is required for the come-along (), and the pulley is connected to a pulley separately attached to a pedestal via a single pulling lobe, and by pulling one end of the pulling lobe, the tension load can be applied to each pulley. A method of tightening the linear body that adjusts the slackness of the linear body while allowing the come-along to take part.

2. To draw the wire body to the pedestal J: To adjust the slackness of the wire body When tightening the wire body, attach multiple come-alongs to the wire body to be strained, and attach a plurality of come-alongs to each come-along. A pulley is attached and a pulley is also attached to the pedestal side, and between the come-along and the pedestal, a yoke having a separate group of pulleys is arranged at a position facing these pulleys, and the pulley of the come-along and the pulley of the yoke are disposed. In addition, the pulley on the pedestal and the pulley on the yoke are connected separately with different pulling ropes, and the slackness of the linear body is adjusted by pulling the pulling rope on the pedestal side. It's in the tension method.

"Example" The following is an explanation based on examples.

Figures 2 and 3 show how wire C is strung.
, 2 and 3 are attached to each come-along, and a general-purpose pulley S, S is also attached to each come-along. A is a pedestal serving as a support base for the tension line; FIG. 2 shows an arm of a steel tower as the pedestal, and FIG. 3 shows an example of an anchor block as the pedestal. The same pulleys s- and s' are attached to these pedestal sides, and as shown in the figure, the come-along pulleys S and S and the pulley S' on the pedestal side.

It is connected to S' by one pulling lobe W.

One end of the pulling lobe W is fixed to a pedestal A, and one end is wound up by an engine car E (not shown). If it is gripped in this way, the entire load on the wire C will be three come-alongs.

K2. 3 (Needless to say, it is limited to 3 [)C is not required, but it is okay to have more than one, it is Momo/V)), and the load applied to the come-along of 11 and 1 is 3 minutes. For example, in the case of Figure 1, the tension load is 9, which is unthinkable for ordinary overhead wires.
However, since the load is distributed as described above, accidents such as damage or breakage of the aluminum layer as described above do not occur.

Furthermore, although each rope is equipped with multiple pulleys, the actual tensioning work involves only pulling a single rope, so there is no substantial difference from conventional tensioning work.

FIG. 4 shows yet another embodiment, in which yokes Yl, Y2 are separately interposed between the electric wire and the pedestal, and the pulley S on the come-along side,
Connect the pulleys S and S on the yoke Yl side with the pulling rope W1, and connect the pulleys S and S on the yoke Yl side to the yoke Y.
The pulleys S and S on the two sides are connected by a separate pulling rope W2.

By interposing the yoke in the middle in this manner, the distribution of the overhead wire tension becomes more efficient, and the load sharing becomes smaller in each come-along. Furthermore, since the tension applied to the entire pulling rope W2 connecting the portion r in the figure between the yokes Y1 and Y2 is also reduced, a thinner rope can be used.

The above was explained using the case of tensioning electric wires as an example.
[] - If there is a lot of grease, such as a rope in Buway, etc.
It can also be applied to the construction or loosening of filaments coated on the surface of the surface of the fibers, and can exhibit excellent effects.

(Effects of the Invention) As described above, the wire tensioning method according to the present invention can be used simply by using conventional come-alongs or pulleys as they are. This makes it possible to close lines extremely safely and with high reliability in situations where lines are lined up, and its usefulness should be highly evaluated.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing how electric wires are laid across a river, and FIGS. 2 to 4 are explanatory diagrams showing three embodiments of the present invention. A: Cable, C: Electric wire, N: Come along, S: Pulley, W
: Pull rope, Y: York Akira 2nd J183 day

Claims (1)

[Claims] '1. The slackness of the linear body is adjusted by pulling the IQ-shaped body to the pedestal.In the tensioning of the linear body, a plurality of come-alongs are attached to the IQ-shaped body, and a pulley is attached to each come-along. , the pulley and the pulley separately set on a pedestal are connected via a single pulling rope, and one end of the pulling rope is taken over. A tensioning method for a linear body that adjusts the slackness of a linear body. 2. In a tensioning method for a linear body that adjusts the slackness of a linear body by pulling the linear body to a pedestal, A plurality of come-alongs are attached to the body, a pulley is attached to each come-along, and a pulley is also attached to the pedestal side, and a separate pulley 8Y is installed between the come-along and the pedestal (in addition, a separate pulley 8Y is located opposite to these pulleys). Each has a right yoke,
The come-along pulley and the yoke pulley, as well as the pedestal pulley and the yoke pulley, are connected separately with different pull ropes, and the sag of the linear body is reduced by pulling the pull lobe on the pedestal side. Adjustment method for tightening linear bodies.