JPH0231929Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a tension-resistant and bend-resistant cabtire cable for supplying power to electrical appliances suspended from a ceiling or the like.

(Prior art) The cord used for power supply to electric appliances suspended from the ceiling cannot suspend heavy electric appliances with its own tensile strength, so it is necessary to suspend the appliance with a chain or the like. It is common practice to do so.

On the other hand, in recent years, some hanging electrical appliances have been equipped with a function to wind up the power supply cord inside the appliance and extend it so that the appliance can be raised and lowered to a desired position, and the cab tire cable for power supply is left over. When there is a shortage, the cab tire cable is wound inside the device, and when there is a shortage, the cabtire cable is wound inside the device and fed out.

(Problem to be solved by the invention) In this case, the above-mentioned method of suspending the equipment with a chain has the risk of the chain getting tangled when winding or unwinding the power supply cord, and
The feeding structure is also complicated. Therefore, it is possible to insert a tension member into the power supply cabtire cable, but simply inserting a tension member will reduce the flexibility of the cabtire cable due to the rigidity of the tension member. , there are problems such as loss of bending resistance and difficulty in winding and unwinding.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a cab tire cable that is flexible and has excellent tensile strength and bending resistance.

(Means for solving the problem) In order to achieve this purpose, the present invention
It is characterized by a structure in which a grounding wire is arranged in the center, and an outer sheath is applied to a core in which insulated conductors with the same outer diameter and tension members with an insulated coating are arranged and twisted adjacent to each other alternately. shall be.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the drawings. FIG. 1 is a cross-sectional view of a cab tire cable according to an embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of FIG. 1.

In these figures, reference numeral 1 is a ground wire placed in the center. This grounding wire 1 is composed of electrical copper strands 11 (each strand has a diameter of 0.26 mm, and the total number of strands is 30).

2 is an insulated conductor, and this insulated conductor 2 is made of electrical copper strands 21 (each strand has a diameter of 0.26 mm).
(The total number of stranded wires is 37) and an insulating coating 22 made of a vinyl chloride mixture is applied to a thickness of 0.8 mm.

3 is a tension member, and this tension member 3 is made of stainless steel composite stranded wire 31 (with a diameter of
0.26 mm, and the total number of stranded wires is 4), and an insulating coating 32 made of a vinyl chloride mixture is applied thereto.

The outer diameter of the tension member 3 is the same as the outer diameter of the insulated conductor 2.

If the outer diameters are made the same in this way, the center axis of the cab tire cable can be set as the neutral line.
Since the position of the rigid tension member 3 and the position of the non-rigid insulated conductor 2 are equalized, there is no directionality when bending, and since the tension member 3 is covered with an elastic material, it is flexible. The flexibility is good, and with such a structure, the insulated conductor 2 does not hang when bent, so the bending resistance is also good.

4 is a 1.8 mm thick outer cover made of a vinyl chloride mixture, and if necessary, a heat-resistant vinyl chloride mixture is used.

The insulated conductor 2 and the tension member 3 are twisted together on the ground wire 1 at a pitch of 15 times the layer core diameter D', that is, a pitch of 72 mm. The above is just an example, and the thickness of each part depends on the power consumption of the electrical appliance,
It is selected appropriately depending on its weight and other factors. In addition, although the twisting pitch was set to 15 times the layer core diameter, flexibility could be improved by making the pitch even smaller, but this should be determined as appropriate in consideration of economic efficiency.

It is conceivable to place the tension member in the center and twist and arrange two insulated conductors and one insulated lead wire for grounding, a total of three wires, on the tension member. If the configurations of the wires are not the same, the stiffness of each wire will be unbalanced, causing some problems in terms of flexibility and bending resistance. Furthermore, although the grounding wire is not coated with an insulating coating in the above embodiment, it is also possible to coat the grounding wire with an insulating coating.

(Effects) As described above, the present invention has excellent tension resistance, bending resistance, and flexibility, and the cab tire cable winding and unwinding device built into the electrical appliance operates smoothly. It is now possible to use electrical appliances for a long period of time without worrying about the cab tire cable breaking.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a cab tire cable according to an embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of FIG. 1. In the figure, 1 is an insulated lead wire for grounding, 2 is an insulated conductor, 3 is a tension member, 4 is an outer cover,
D′ is the layer core diameter.

Claims (1)

[Scope of utility model registration request] A grounding wire is arranged at the center, and an insulated conductor and tension members each having an insulating coating are arranged adjacent to each other alternately on the grounding wire, and an outer sheath is applied to the twisted core. A tension-resistant and bend-resistant cabtire cable, wherein the outer diameter of the insulated conductor and the outer diameter of the tension member are the same.