JPH03218209A - Car for installation of overhead line - Google Patents

Abstract

PURPOSE:To safely and efficiently install overhead lines on the ground by incorporating a tension detector for detecting tension of the overhead line, a car speed detector and a drum drawing-out quantity controller. CONSTITUTION:A body 2 of an overhead line installation car 1 is provided with a drum of a communication cable 3 wound for the overhead line use, which is mounted as rotatable. The car body 2 mounts an extensible swivel arm 6 and a mounting arm 8 remote-controllable at an arm operation seat 9. The arm 6 is provided with an arm-tip stress detector 11 for a tension detector and a car detector for a car speed detector. A detected signal from each detector is input to a computor provided for a controller. A constant tension is always given to the overhead line being drawn out, by automatically adjusting a drawing-out quantity with the controller.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a vehicle for laying overhead lines such as communication cables.

Conventional technology> Figure 7 (5) is used to lay communication cables, etc. overhead.
As shown in FIG.
A common method is to fix the

Therefore, conventionally, as shown in FIG. 7 (8), the tip of the cable 22 or the rope (haulline) 2
3 etc. is inserted into the pulley 24 temporarily fixed to the utility pole 20 by a worker using a crotch tool 25 inserted from the ground, and after extending the wire across multiple utility poles 20, the wire is finally shown in Fig. 7 (5). It was fixed with the shown fixing fittings 21.

Problems to be Solved by the Invention> However, in the above-mentioned installation method, all the work such as installing the fixing fitting 21 and fixing the cable 22 to the fixing fitting 21 is done manually, and it is essentially necessary to install the cable in a high place. Since it will be work,
There was always the danger of falling.

Furthermore, when a cable 22 having a non-circularly symmetrical cross section as shown in FIG. 8(5), β) is laid in the air, it is necessary to twist the cable 22 in order to prevent dancing due to the wind. Therefore, as the cable 22 becomes larger, a larger force must be applied to the cable 22 to twist it, which also makes working at heights more dangerous.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an overhead line laying vehicle that can safely and efficiently lay overhead lines from the ground.

<Means for Solving the Problems> In order to achieve the above object, an overhead line laying vehicle according to the present invention moves while unrolling an overhead line from a state where it is wound around a drum, and also moves this overhead line by moving the overhead line from an upper part of a support member. In a vehicle equipped with a payout arm that can be fixed to a vehicle, tension detection means for detecting the tension of the overhead line, vehicle speed detection means for detecting the speed of the vehicle, and signals from the tension detection means and the vehicle speed detection means are provided. Based on the above, the present invention is characterized by comprising a control means for controlling the amount of rotation of the drum to be fed out so that the tension applied to the overhead line during feeding is always within a certain range.

Further, in a vehicle that moves while giving a twist to the overhead line by rotating the drum while paying out the overhead line from a state where it is wound around the drum, a payout amount detection means for detecting an amount of the overhead line payout from the drum; A vehicle speed detection means detects the speed of the vehicle, and the drum is twisted so that a predetermined amount of twist corresponding to the amount of overhead line payout is obtained based on signals from the payout amount detection means and the vehicle speed detection means. It is characterized by having a control means for controlling the amount of turning.

<Function> According to the above configuration, a constant tension is always applied to the overhead line being fed out by automatically adjusting the amount of feeding out.

Further, each time the overhead line is let out for a certain length, a twist is applied to the overhead line.

Embodiment> An embodiment of the present invention will be described below based on the accompanying drawings.

As shown in FIG. 1, a drum 4 on which a communication cable 3 as an overhead line is wound is rotatably mounted on a vehicle body 2 of an overhead line laying vehicle 1, and supports the cable 3. A telescopic and pivotable extension arm 56 which can be fixed to the upper part of the utility pole 5 as a member is installed.

In the illustrated example, in addition to the feeding arm 6, a mounting arm 58 that is extendable and pivotable for attaching the cable fixing tool 7 to the utility pole 5 is provided on the vehicle body 2, and both arms 6 and 8 are connected to the vehicle body 2. Arm pilot seat 9 on vehicle main body 2
It is now remotely controlled. In addition, 10 in FIG. 1 is a vehicle driver's cab.

As shown in FIG. 2, the feeding arm 6 is equipped with an arm tip stress detecting section 11 as a tension detecting means.
Further, a vehicle moving amount detecting section 12 as a vehicle speed detecting means is provided around the wheels of the vehicle main body 2, and a cable feeding amount detecting section 1 as a feeding amount detecting means is further provided on the drum 4.
3 are installed respectively.

Further, the drum 4 is fed out and rotated by a first motor 14 and rotated by a second motor 15. A drum rotation amount detection unit] 6 for detecting the amount of twist of the cable 3 is installed around the output shaft of the second motor 15.

Arm tip stress detection section 1], vehicle movement amount detection section 12
Detection signals from the cable feeding amount detection section 13 and the drum rotation amount detection section 16 are inputted to a calculation section 17 as a control means, and an operation input section 18 is connected to the calculation section 17 by a circuit.

The arithmetic unit 17 includes an arm tip stress detecting unit 11.
And based on the detection signal from the vehicle movement amount detection section 12,
While calculating the tension of the cable 3 and the speed of the overhead line laying vehicle 1, the payout speed of the drum 4 (i.e., the rotation of the first motor 14) is adjusted so that the tension applied to the cable 3 during payout is always within a certain range. A predetermined amount of twist corresponding to the cable payout amount is obtained based on the detection signals from the vehicle movement amount detection section 12, cable payout company detection section 13, and drum rotation amount detection section 16. In this way, the amount of rotation of the drum 4 (ie, the rotation angle of the second motor 15) is controlled while taking into account the speed of the overhead line laying car 1.

In addition, the calculation section 17 detects the tension T of the cable 3 by detecting the horizontal component F and the vertical component N of the stress applied to the tip of the feeding arm 6 from the arm tip stress detection section l1, as shown in FIG. , T= (F2-1-N”) /2 F...(
Calculate it using the formula 1). Note that the above equation (1) can be easily obtained from equations (2) and (3) described later.

T=Tc&1θ+F −(21N=T θ
...(3) Next, a method of laying the cable 3 using the present overhead line laying vehicle (hereinafter simply referred to as vehicle) 1 will be explained.

As shown in FIG. 3 (5) to (DJ), first operate the attachment arm 8 to attach the cable fixing fitting 7 to the top of the utility pole 5 (see the state in FIG. 3 (5)).

Next, pull out one end of the cable 3 from the drum 4, operate the feeding arm 6, and fasten it to the utility pole 5 (Fig. 3 (B)
(see condition).

Next, move the vehicle 1 while letting out the cable 3,
Head towards the adjacent telephone pole 5.

At this time, the cable tension is detected so that excessive tension is not applied to the cable 3, and the vehicle 1 is run while automatically adjusting the cable payout amount so as to maintain the set tension.

That is, as shown in the tension control timing chart shown in FIG. 5, when the vehicle 1 is moving, the amount of rotation of the drum 4 is changed according to the detected tension to maintain a constant tension while the vehicle 1 also stops the rotation of the drum 4, and when the tension increases, the drum 4 is rotated at a high speed to increase the cable payout amount and lower the tension. Furthermore, in this embodiment, when detecting the cable tension, the above-mentioned arm tip stress detecting section 11 directly obtains the cable tension from the cable 3, so that the measurement accuracy is good. That is, if the frictional resistance of the roller part that supports the cable 3 in the middle is ignored, the tension T of the cable 3 can be obtained by detecting the torque at the drum feeding rotation part, but if the detection method B is used, This is not practical because its own weight and inertia cannot be ignored.

At the same time, twist according to the distance traveled (once every 10m)
is given to cable 3. That is, as shown in the timing chart of twisting control shown in FIG. 6, the cable 3 is twisted once every time it is paid out a certain length based on the signal from the cable feeding amount detection section 13. In the example shown in FIG. 6, the twisting instruction pulse for the second motor 15 is such that every six pulses the twisting is forced.

Subsequently, when the target utility pole 5 is reached, the cable fixing fitting 7 is attached to the utility pole 5 again using the installation arm 8, and then the cable 3 is attached to the utility pole 5 using the feeding arm 6.
All you have to do is hold it back (see the state in Figure 3 f(E), 0)).

In addition, in the second embodiment, one vehicle 1 has a feeding arm 6.
Although the two mounting arms 8 and 8 are installed, the present invention is not limited to this, and they may be installed on different vehicles. Further, although the cable 3 is twisted while the vehicle is running, it may be twisted after the vehicle has stopped.

Effects of the Invention> As explained above, according to the present invention, it is possible to avoid manual work at high places, and to connect overhead lines such as communication cables to high places of support members such as utility poles by working on the ground, partially automatically. The effect is that it can be laid efficiently without complicated operations.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram showing an embodiment of the present invention, Fig. 2 is a block diagram showing its control function, Fig. 3 is a process diagram showing the laying method, and Fig. 4 is a cable tension detection method. Fig. 5 is a timing chart of tension control;
The figure is a timing chart of twisting control, Figure 7 (5), (
B) is an explanatory diagram showing the installation state and installation method of a conventional example, and FIGS. 8(5) and 03) are sectional views showing cables with different asymmetrical cross sections. In addition, in the drawing, 1 is an overhead line laying vehicle (vehicle), 3 is a communication cable, 4 is a drum, 5 is a telephone pole, 6 is a feeding arm,
11 is an arm tip stress detection section, 12 is a vehicle movement amount detection section, 13 is a cable payout amount detection section, 16 is a drum rotation amount detection section, and 17 is a calculation section.

Claims (2)

[Claims] (1) In a vehicle equipped with a payout arm capable of moving an overhead line while unrolling it from a state where it is wound around a drum and fixing the overhead line to an upper part of a support member, a tension detection means for detecting the tension of the overhead line; A vehicle speed detecting means for detecting the speed of the vehicle; and a vehicle speed detecting means for detecting the speed of the vehicle, and the drum is configured so that the tension applied to the overhead track being fed out is always within a certain range based on signals from the tension detecting means and the vehicle speed detecting means. 1. An overhead track laying vehicle, comprising: a control means for controlling the rotation amount of the feed-out rotation amount. (2) A pay-out amount detection means for detecting the amount of pay-out of the overhead line from the drum in a vehicle that moves while giving twist to the overhead line by rotating the drum while paying out the overhead line from a state in which it is wound around the drum; A vehicle speed detecting means for detecting the speed of the vehicle, and a predetermined twisting amount corresponding to the amount of overhead line payout based on signals from the payout amount detecting means and the vehicle speed detecting means. An overhead track laying vehicle characterized by having a control means for controlling the amount of turning of the vehicle.