JP2774633B2 - Overhead track laying car - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle for laying an overhead line such as a communication cable.

<Conventional technology> Fig. 7 (A)
As shown in (1), a general method is to construct utility poles 20 at predetermined intervals, and to fix cables 22 to the upper side surfaces thereof via fixing fittings 21.

For this reason, conventionally, as shown in FIG. 7 (B), the tip of the cable 22 or a rope (towing line) 23 connected thereto is connected.
And the like are inserted through a pulley 24 temporarily fixed to the utility pole 20 from the ground using a crotch tool 25 and extended over a plurality of utility poles 20, and finally shown in FIG. 7 (A). It was fixed with the fixing bracket 21.

<Problems to be Solved by the Invention> However, in the above-described laying method, all operations such as the installation of the fixing bracket 21 and the fixing of the cable 22 to the fixing bracket 21 are manually performed, and the work is essentially performed at a high place. Since it was an operation, there was always a danger of falling.

When the cable 22 having a non-circular symmetrical cross section as shown in FIGS. 8A and 8B is laid aerial, it is necessary to twist the cable 22 in order to prevent dancing by wind. . Therefore, as the cable 22 becomes larger, a larger force must be applied to the cable 22 in order to twist it, which also makes working at heights more dangerous.

Accordingly, an object of the present invention is to provide an overhead line laying vehicle capable of laying an overhead line more safely and efficiently than on the ground.

<Means for Solving the Problems> In order to achieve the above object, the present invention relates to an overhead line composed of a cable having a non-circular symmetrical cross section, while turning the drum while unwinding the drum from a state wound around the drum, and twisting the overhead line. In addition to moving the vehicle while giving a
Tension detecting means for detecting the tension of the overhead line, feeding amount detecting means for detecting the feeding amount of the overhead line from the drum, vehicle speed detecting means for detecting the speed of the vehicle, these tension detecting means and vehicle speed Control means for controlling the amount of rotation of the drum for feeding, based on a signal from the detecting means, so that the tension applied to the overhead line being fed is always within a certain range; Control means for controlling the amount of rotation of the drum so that a predetermined amount of twisting corresponding to the amount of overhead line extension is obtained based on a signal from the means.

<Operation> According to the above configuration, a constant tension is always applied to the overhead line being extended by automatically adjusting the extension amount.

In addition, twisting is given to the overhead line being fed out for a fixed length.

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

As shown in FIG. 1, a vehicle body 2 of an overhead track laid vehicle 1
A drum 4 around which a communication cable 3 as an overhead line is wound is rotatably mounted, and the cable 3 can be fixed to an upper part of a utility pole 5 as a support member, and can be expanded, contracted, and turned. The dispensing arm 6 is installed.

In the illustrated example, in addition to the extending arm 6, the electric pole 5
The vehicle main body 2 is provided with a mounting arm 8 that can be extended and contracted and turned for mounting the cable fixing bracket 7, and both of the arms 6 and 8 are arm control seats 9 on the vehicle main body 2.
Is remotely controlled from In addition, in FIG.
Reference numeral 10 denotes a vehicle cab.

Then, as shown in FIG.
Has an arm tip stress detecting unit 11 as a tension detecting means,
Further, a vehicle moving amount detecting unit 12 as a vehicle speed detecting unit is provided around the wheels of the vehicle body 2, and a cable feeding amount detecting unit 13 as a feeding amount detecting unit is provided on the drum 4.

The drum 4 is rotated by a first motor 14 while being rotated by a second motor 15. A drum rotation amount detection unit 16 for detecting the amount of twist of the cable 3 is provided around the output shaft of the second motor 15.

The arm tip stress detection unit 11, the vehicle movement amount detection unit 12,
The detection signals from the cable feeding amount detecting unit 13 and the drum turning amount detecting unit 16 are input to a calculating unit 17 as a control means, and an operation input unit 18 is connected to the calculating unit 17 by a circuit.

The calculating unit 17 calculates the tension of the cable 3 and the speed of the overhead line laying vehicle 1 based on the detection signals from the arm tip stress detecting unit 11 and the vehicle moving amount detecting unit 12 while detecting the cable 3 being fed out. So that the tension applied to the drum 4 is always within a certain range.
The rotation speed of the motor 14 is controlled, and based on detection signals from the vehicle movement amount detector 12, the cable extension amount detector 13, and the drum turning amount detector 16, a predetermined twist corresponding to the cable extension amount is controlled. In order to obtain the amount, the drum 4
(I.e., the rotation angle of the second motor 15) is controlled in consideration of the speed of the overhead track trolley 1.

The calculating unit 17 detects 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 detecting unit 11 as shown in FIG. , T = (F ² + N ² ) / 2F (1) The expression (1) can be easily obtained from the expressions (2) and (3) described later.

T = Tcos θ + F (2) N = Tsin θ (3) Next, a method of laying the cable 3 using the overhead line laying vehicle (hereinafter simply referred to as a vehicle) 1 will be described.

As shown in FIGS. 3 (A) to 3 (D), first, the mounting arm 8 is operated to mount the cable fixing bracket 7 on the telephone pole 5 (see the state of FIG. 3 (A)).

Next, one end of the cable 3 is pulled out from the drum 4, and the feeding arm 6 is operated to be fixed to the utility pole 5 (see the state of FIG. 3B).

Next, the vehicle 1 is moved while paying out the cable 3 and heads for the adjacent utility pole 5.

At this time, the vehicle 1 travels while detecting the cable tension so that no excessive tension is applied to the cable 3 and automatically adjusting the cable feeding amount so as to maintain the set tension. That is, as shown in the timing chart of the tension control shown in FIG. 5, when the vehicle 1 is moving, the feeding rotation amount of the drum 4 is changed according to the detected tension to maintain the constant tension, The rotation of the drum 4 is also stopped by the stop of 1, and when the tension increases, the drum 4 is rotated at a high speed to increase the cable feeding amount and reduce the tension. In the present embodiment, the detection of the cable tension is directly obtained from the cable 3 in the above-described arm tip stress detection unit 11, so that the measurement accuracy is good. That is, ignoring the frictional resistance at the roller portion supporting the cable 3 in the middle, the tension T of the cable 3 can be obtained by detecting the torque at the rotating portion for feeding the drum.・ It is not practical because inertial force cannot be ignored.

At the same time, twisting according to the running amount (once every 10m)
Is applied to the cable 3. That is, as shown in the timing chart of the twisting control shown in FIG. 6, the cable 3 is twisted once each time the cable 3 is fed out for a predetermined length based on the signal from the cable feeding amount detecting unit 13. In the example of FIG. 6, a twist instruction pulse for the second motor 15 is inserted once every six pulses.

Subsequently, when the electric pole 5 reaches the target, the cable fixing metal fitting 7 is attached to the electric pole 5 again by the attaching arm 8, and then the cable 3 may be fixed to the electric pole 5 using the extending arm 6. (See the state of FIG. 3 (C), (D)).

In the above embodiment, the delivery arm 6 is attached to one vehicle 1.
And two mounting arms 8 are installed, but the present invention is not limited to this, and they may be installed in different vehicles. In addition, the twisting of the cable 3 is performed during the running of the vehicle, but may be performed after the vehicle stops.

<Effects of the Invention> As described above, according to the present invention, human overhead work is avoided, and overhead lines, such as communication cables, are installed on the ground of support members such as telephone poles by ground work, and partially automated. The effect that the installation can be efficiently performed without complicated operation is obtained.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention, FIG. 2 is a block diagram showing its control function, FIG. 3 is a process diagram showing the same laying method, and FIG. 4 shows a cable tension detecting method. FIG. 5 is a timing chart of tension control, FIG.
The figure shows the timing chart of the twist control, FIG. 7 (A),
(B) is an explanatory view showing a laying state diagram and a laying method of a conventional example,
FIGS. 8A and 8B are cross-sectional views showing cables having different non-circularly symmetric cross-sections. In the drawings, reference numeral 1 denotes an overhead line laid vehicle (vehicle), 3 denotes a communication cable, 4 denotes a drum, 5 denotes a telephone pole, 6 denotes a payout arm,
11 is an arm tip stress detecting section, 12 is a vehicle moving distance detecting section, 13
Is a cable feeding amount detecting unit, 16 is a drum turning amount detecting unit,
Reference numeral 17 denotes a calculation unit.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuo Asano 1 Tayacho, Sakae-ku, Yokohama-shi, Kanagawa Prefecture Sumitomo Electric Industries, Ltd. Yokohama Works (72) Inventor Tokio Kawanabe 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Minoru Shiragata 1-6-1 Uchisaiwai-cho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-2-74110 (JP, A) Akira Kaikai 57-63410 (JP, U) Actually open 63-113407 (JP, U) Actually open 51-211795 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02G 1/00 -1/06

Claims (1)

(57) [Claims] An aerial line formed of a cable having a non-circular symmetrical cross section is turned while being unwound from a state wound around the drum, and is moved while imparting a twist to the aerial line. In a vehicle provided with a payout arm that can be fixed to the vehicle, a tension detecting means for detecting a tension of the overhead line, a payout amount detecting means for detecting a payout amount of the overhead line from the drum, and a vehicle speed for detecting a speed of the vehicle Detection means, and control means for controlling the amount of rotation of the drum to be fed out, based on signals from the tension detection means and the vehicle speed detection means, so that the tension applied to the overhead line being fed is always within a certain range. A predetermined twist amount corresponding to the overhead line extension amount is obtained based on signals from the extension amount detection unit and the vehicle speed detection unit. So that the fictitious line laying vehicle, characterized in that a control means for controlling the pivoting of the drum.