JPH0710124B2 - Old line removal method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a method for removing an aged electric wire, that is, an old wire.

<Prior Art> As a conventionally known method of removing an old line, there is a hanging wheel reversing method using a hanging wheel.

<Problems to be Solved by the Invention> However, in the case of the suspension wagon inversion method, a considerable amount of bending and tension is applied to the old wire, and therefore, in the case of the old wire, which has a large degree of deterioration over time, the phenomenon of cutting during removal Is likely to occur. And if you disconnect during the removal process, the old line will hang down from the disconnection point, which will cause a traffic accident in the lower part and eventually a traffic accident, or will adversely affect the trees and structures below, etc. Therefore, there is a problem that the removal work is delayed and it cannot be completed within the planned construction period.

Therefore, in the present invention, the old line can be removed without applying excessive bending or tension, and even if the old line is cut, it does not droop too much, which may cause a traffic obstacle below or a work on the ground or the like. It is intended to provide an old line removal method that allows the removal work to be performed as it is.

<Means for Solving the Problem> Specifically, a plurality of transporters are movably deployed on a support rope extended in the old line removal section while being connected to a connecting rope at predetermined intervals. The old line shall be transported and removed by these carriers, and the old line shall be removed by connecting an electric wire gripper to each carrier and carrying and removing the old line while gripping the old line with this wire gripper. Provide a construction method.

In addition, in this invention, regarding such old line removal method,
Connect the wire gripper to the device via a hanging rope, attach the wire gripper to the old wire in a stretched state, and then attach the wire gripper to the old wire by loosening the old wire to loosen the old wire. The weight is applied to the wire gripper, and the tension of the hanging rope generated at that time is used to operate the gripping body of the wire gripper in the gripping direction, and the tension of the hanging rope causes the gripping force on the gripping body. The wire is given to hold the wire.

<Operation> According to this old line removal method, since the old line is conveyed and removed by the carrier, the old line is hardly bent or tensioned.

Moreover, since the carrier is connected by a connecting rope and the old wire is gripped by the wire gripper connected to this carrier, the old wire will not hang down for more than the distance between the carrier even if it is cut. Then you can continue the removal work.

Further, according to the old wire removing method according to the present invention, each wire gripper automatically grips an electric wire all at once by simply removing the old wire from the utility pole and loosening it. It is possible to substantially eliminate the troublesome work for making the work, and the workability of removing the old wire by the wire gripping method can be significantly improved.

<Embodiment> An embodiment of the present invention will be described below in order with reference to the drawings.

Extending the pilot rope First, extend the pilot rope 1 in the old line removal section.
As the method, an appropriate method such as a method of running a light-weight self-propelled machine on the old line, a hand-drawing method, or a method using a helicopter can be used.

Extending the messenger rope [Fig. 1 (a)] The extended pilot rope 1 and the messenger rope 2
Connect and connect the pilot rope 1 with the winch 4e in the engine field E and extend the messenger rope 2.

Extension of connecting rope [Fig. 1 (b)] When the tip of the messenger rope 2 reaches the winch 4e, connect the connecting rope 6 to the messenger rope 2 via the yoke 5 and wind the messenger rope 2 with the winch 4e. While extending the connecting rope 6.

Support rope extension [Fig. 1 (c)] After the connection rope 6 has been extended, the support rope 7 is then connected to the rear end of the messenger rope 2 and, similarly, the messenger rope 2 is wound by the winch 4e. Extend the support rope 7.

Supporter set [Fig. 1 (d)] Supporters 9, 9, ... are attached to the towers 8, 8, ..., and the support ropes 7 and the connecting ropes 6 are attached to the supporters 9, 9 ,. set.

Specifically, as shown in FIG. 9 and FIG. 10, the support device 9 includes a suspension portion 10 for suspending the steel tower 8, a support portion 11 for supporting the support rope 7, and a connecting rope 6. It is provided with a guide wheel 12 for guiding the passage and a guide frame 13 for guiding the intrusion of a carrying device which will be described later.
The supporting rope 9 and the connecting rope 6
On the guide wheel 12.

Development of carrier [Fig. 1 (e)] While the carrier 20 is attached to the connecting ropes 6 at a predetermined interval (usually 20 to 30 meters) on the steel towers 8, 8, ... 6 is gradually wound up at the engine station E, and the carrier 20 is deployed in each steel tower section.

The carrier 20 can be unfolded at the same time as the extension of the connecting rope 6, but in this case,
Since the carrier 20 to which the electric wire gripper 30 to be described later is connected is to be deployed while being attached to the connecting rope 6 in the drum field D, the insulator G and the like of the old wire 3 will not interfere with the expansion of the electric wire gripper 30 in advance. Need to be treated.

Here, the carrier 20 includes a roller portion 22 provided with a pair of traveling rollers 21, 21 for traveling on the support rope 7,
A lock door 23 for preventing the roller portion 22 from coming off from the support rope 7, a mounting portion 24 for connecting to the connecting rope 6, and a guide of the guide frame 13 of the support device 9 are shown in FIG. The guide receiving frame 25 is for receiving as shown by an imaginary line, and the lower end of the guide receiving frame 25 has a connecting portion 26 for connecting an electric wire gripper described later.
Are formed.

Deployment of electric wire gripper [Fig. 1 (e)] This is performed at the same time as the deployment of the carrier 20 described above, and the hanging rope 27 is provided for each carrier 20 to be deployed on the tower 8.
The electric wire gripper 30 is connected via and the electric wire gripper 30 is attached to the old wire 3 to be removed. At this time, since the old wire 3 is still stretched, the distance between the carrier 20 and the old wire 3 is narrow, the hanging rope 27 is loose, and the wire gripper 30
As shown in FIG. 1 (e) to FIG. 7, they are in an inverted state due to their own weight balance.

Note that the wire gripper 30 can be deployed from the drum field D as in the case of deploying the carrier 20 described above.

Here, as shown in FIGS. 3 to 6, the wire gripper 30 includes a pair of receiving rollers 31, 31 and a pair of gripping claws 32.
A grip body 34 composed of 32 and a pair of actuating levers 33, 33 for actuating the grip claws 32, 32, a connecting rod 35 and a frame body 36, and a pair of receiving rollers 31, 31 and a pair of receiving rollers 31 and 31. The gripping claws 32 and 32 firmly grip the old wire 3 to be removed.

More specifically, the pair of gripping claws 32, 32 are connected and fixed to the lever shafts 37, 37, respectively, and the lever shafts 37, 37 are rotated by the actuating levers 33, 33 as shown by arrow X. It is adapted to rotate as indicated by an arrow Y in response to the movement.

That is, one end of each of the actuating levers 33, 33 has the lever shaft 3
It is connected and fixed to 7, 37, and the other end is pivotally supported by the shaft pin 38 at the tip of the connecting rod 35 via the elongated holes 39, 39, respectively. When the suspension rope 27 connected to the connecting rod 35 is in a loosened state as shown in FIG. 1 (e), the operating levers 33, 33 are in a state shown by an imaginary line in FIG. However, when the suspension rope 27 becomes tense as will be described later, the tension is pulled by the tension as indicated by arrow Z, as shown by the solid line in FIG. Then, along with this, the lever shafts 37, 37 rotate as indicated by the arrow X, and accordingly the grip claws 32, 32 rotate as indicated by the arrow Y, so that the old wire 3 is changed to the old wire 3.
It will hold firmly with its own weight.

Incidentally, 40 is a spring for urging the gripping claws 32, 32 to be in the state shown in FIG. 7, 41 is a door forming a part of the frame body 36, and as described above, the wire gripper 30 Is used when attaching to the old line 3.

Removal of old wire [Fig. 1 (f)] The old wire 3 to which the wire grippers 30, 30, ... are attached as described above is removed from the towers 8, 8 ,. Then, the old wire 3 is slackened so that the entire weight of the old wire 3 is applied to the wire grippers 30, 30, ..., As a result, as shown in FIGS. 1 (f) to 7, the wire grippers 30, 30, ...... is reversed and the rope is suspended
27, 26, ... get nervous.

Then, when the suspension rope 27 is tensioned, the gripping claws 32, 32 are closed as described above, and the old wire 3 is formed between the holding rollers 31, 31.
Is firmly gripped with the weight of the old wire 3 itself.

Removal of old wire [Fig. 1 (g)] While the old wire 3 is firmly gripped by the wire grippers 30, 30, ... as described above, the connecting rope 6 is connected by the wire drawing machine 4d in the drum field D. The old line 3 is removed by collecting the transporters 20, 20, ... on the drum side D side while winding up.

At this time, since the old wire 3 is conveyed and removed by the carry devices 20, 20, ... Via the electric wire grippers 30, 30 ,. Therefore, the old line, which has deteriorated considerably, can be removed with almost no cutting.

Even if the old wire 3 is cut, the wire gripper 3
Since 0, 30, ... grips the old line 3 firmly, the old line 3 does not hang down more than the distance between the carrying units, so there is no influence on the lower traffic obstacle or the work on the ground. Removal work can be continued without any delay.

Extension of new line [Fig. 2 (a) to (c)] After the removal of the old line that requires removal, the new line is extended by the following construction method as necessary. Of course, it is also possible to extend the wire by another method.

This method of extending the new line is performed by using the support rope 7 and the connecting rope 6 used when removing the old line, and the carrier 20 and the electric wire collected in the drum field D when removing the old line. Gripper
Use 30.

Specifically, the wire gripper 30 that grips the new wire 43
, And transports and extends the new wire 43 while winding the connection rope 6 in which the transporters 20, 20, ... Are connected in a string by the winch 4e of the engine field E [Fig. 2 (a)].

Then, when the wire drawing is completed, temporary lifting is performed, and in the opposite state to that described in the above-described setting of the wire gripper for removing the old wire, the carriers 20, 20, ...
.., 30, ... Are collected on the drum field D side [Fig. 2 (b)].
And (c)].

In this way, a wire extension (wireway extension) using the wire gripper 30
The advantage of is that it can better achieve the purpose of the carrier wire drawing, which is to try to wire the wire with as little effort as possible.

In other words, there are several known wire extensions (carrying wire extensions) that use a carrier, but all of these are for carrying and drawing wires simply by placing them on the carrier. , It is easy to force the wires to be unexpected. Specifically, since the electric wire is simply placed on the carry device, it frequently moves back and forth on the carry device during transportation and extension, resulting in repeated rubbing by the carry device or between the carry devices. It means that the part supported by the carrier is repeatedly bent due to the relationship with the catenary curve. However, according to this construction method, since the electric wire gripper 30 firmly grips the electric wire, such a phenomenon is not caused, and the above-described purpose of the wire extension of the carrier can be better achieved.

<Effects of the Invention> As described above, the old line removing method according to the present invention includes a plurality of ropes connected by a connecting rope at predetermined intervals on a support rope extending in the old line removing section. The carriers are movably deployed, and the old wires are transported and removed by these carriers, and an electric wire gripper is connected to each carrier, and the old wire is gripped and transported by the electric wire gripper. Therefore, the following effects are obtained.

(A) The old wire can be removed with almost no bending or tension, and there is almost no trouble of cutting the old wire.

(B) Even if the old line is cut, the old line does not hang down for more than the interval of the carrier, so it is possible to continue the removal work as it is without affecting the traffic below and the work on the ground. Therefore, there is no work delay due to cutting.

(C) As a result, the old line removal work can be performed safely and efficiently within the scheduled construction period.

[Brief description of drawings]

FIG. 1 is a side view showing an outline of an old line removing operation, FIG. 2 is a side view showing an outline of a new line extending work, and FIG. 3 is an outline of an electric wire gripper connected to a carrier. A side view, FIG. 4 is a schematic side view seen from an arrow IV direction in FIG. 3, FIG. 5 is a schematic side view showing a gripping body of an electric wire gripper, and FIG. 6 is a side view of FIG. Fig. 7 is a schematic plan view seen from the direction of the arrow VI. Fig. 7 is a schematic side view showing the state of the electric wire gripper when the hanging rope is loose. Fig. 8 is an electric wire gripper when the hanging rope is in tension. FIG. 9 is a schematic side view of the supporting device, and FIG. 9 is a schematic side view of the supporting device, and FIG. 3 …… Old line 6 …… Connection rope 7 …… Support rope 20 …… Carryer 27 …… Hanging rope 30 …… Electric wire gripper 34 …… Grip body

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mitsuhiro Yasunaga 3-22 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture 3-22 Kansai Electric Power Co., Inc. (72) Masayasu Imai 3-27-12 Horikiri, Katsushika-ku, Tokyo Stock company Yasuda Works (72) Inventor Yoshisada Ishida 3-27-12 Horikiri Katsushika-ku, Tokyo Stock company Yasuda Works (72) Inventor Toshio Kaido 3-27-12 Horikiri Katsushika-ku, Tokyo Stocks (56) References JP 49-112193 (JP, A) JP 63-202211 (JP, A)

Claims (2)

[Claims] 1. A plurality of carriers are movably deployed on a support rope extended in the old line removal section while being connected to a connecting rope at a predetermined interval, and the old line is extended by these carriers. An old line removal method for transporting / removing, characterized in that an electric wire gripper is connected to each of the above-mentioned carriers, and the old wire is gripped and transported / removed by the electric wire gripper . 2. An electric wire gripper is connected to a carrier via a hanging rope, and the electric wire gripper is attached to the old wire in a stretched state with the hanging rope loosened, and the old wire is loosened. By doing so, the weight of the old wire is applied to the wire gripper, and the tension of the hanging rope generated at that time is used to actuate the gripping body of the wire gripper in the gripping direction and grip the tension of the hanging rope. The old wire removing method according to claim 1, wherein a gripping force is applied to the body to grip the electric wire.