JP2016066554A - Flat cable and twisting reduction method of flat cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that, even when a reinforcement wire for generating rotation force in an opposite direction is provided, there are cases that twisting is generated at a delivery destination, and there is no means for solving generated twisting.SOLUTION: A flat cable comprises: plural assembly wire cores formed by stranding plural insulation coating wire cores; reinforcement wires which are a pair whose stranding directions are mutually opposite directions; and a coating layer for coating the assembly wire cores and reinforcement wires with an insulation material together, the reinforcement wires are disposed on outside of the arranged assembly wire cores respectively, and when twisting is generated, part of the coating layer is cut for forming an opening, for exposing the reinforcement wires.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flat cable used in a mobile device.

  As a means for preventing twisting of a flat cable used in a moving device such as an elevator, Japanese Patent Laid-Open No. 2010-102851 discloses an S-twisted tensile body and a Z twist symmetrically about the central axis of the flat cable. These strength members are arranged in combination, and the strength members are described in which a cross section in a direction substantially orthogonal to the longitudinal direction of the cable is formed into a substantially polygonal cross section or a substantially oval cross section.

  Japanese Patent Laid-Open No. 2005-67761 discloses that the twisting directions are opposite to each other, and the first and second reinforcing ropes supporting the weight of the control cable itself are passed through the inside of the control cable body, and these The first and second reinforcing ropes are described as extending from the resin coating of the control cable body at both ends of the control cable.

JP 2010-102851 A JP 2005-67671 A

  However, in the above-mentioned, the flat cable is provided with a tensile body that generates rotation forces in opposite directions and first and second reinforcing ropes (hereinafter referred to as reinforcing wires). Is a long product formed by covering a reinforcing wire and a plurality of assembly wire cores with an insulating material, and thus it has not been possible to completely prevent variations in products. For this reason, when a flat cable is applied to a long-stroke elevator, there are cases where twisting occurs depending on the delivery destination even if reinforcing wires that generate rotational forces in opposite directions are provided. There is no means to solve the problem, and depending on the degree of twisting, the cable can be replaced.

  In order to achieve the above object, the present invention provides a plurality of assembly wire cores formed by twisting a plurality of insulating coated wire cores, a pair of reinforcing wires whose twist directions are opposite to each other, and In a flat cable provided with an assembly wire core and a covering layer that collectively coats the reinforcement wire with an insulating material, the reinforcement wire is arranged outside the assembly wire cores arranged in parallel, and twisting occurs. In this case, a part of the covering layer is cut to form an opening, and the reinforcing wire is exposed.

  According to the present invention, when twisting occurs, a part of the covering layer is excised, the reinforcing wire is exposed, the rotational characteristics in the longitudinal direction of the flat cable are corrected, and twisting can be improved, As a result, twisting can be handled without requiring cable replacement, and costs can be reduced.

It is the perspective view which showed one Embodiment of the flat cable of this invention, and excised a part of coating layer. It is a perspective view which shows the structure of the flat cable in this Embodiment. It is explanatory drawing explaining the installation state of a flat cable. 1 is a schematic configuration diagram of an elevator to which the present invention is applied.

  Hereinafter, embodiments of a flat cable according to the present invention will be described with reference to the drawings.

  As shown in FIG. 4, the elevator includes a hoistway 2 formed in the building 1, an elevating body that moves up and down the hoistway 2, that is, a car 3 and a counterweight 4, and a machine room 5 formed in the upper part of the building 1. The hoisting machine 6 installed on the hoisting machine 6, the sheave 6 a of the hoisting machine 6, and the sled wheel 7 disposed in the vicinity of the sheave 6 a are wound around the car 3 at one end and the counterweight 4 is suspended at the other end. A main rope 8 that is installed in the machine room 5 and controls an elevator, a wiring 10 that extends from the control device 9 to the hoistway 2, and a junction box 11 that is provided at an intermediate position of the hoistway 2. And a tail cord 12 connected to the lower end of the car 3.

  The tail cord 12 is a flat cable, and, as shown in FIG. 2, a pair of assembly wire cores 13 formed by twisting a plurality of insulation coated wire cores, and a pair in which twist directions are opposite to each other. The reinforcing wires 14a and 14b, and the covering wire 15 that collectively covers the assembly wire core 13 and the reinforcing wires 14a and 14b with an insulating material.

  The collective line cores 13 are arranged in parallel in the longitudinal direction of the tail cord 12, and in the present embodiment, the collective line cores 13 are composed of six collective line cores 13. It becomes a signal transmission line.

  The reinforcing wires 14a and 14b are steel wire ropes, each consisting of a plurality of strands. The plurality of strands have twist directions opposite to each other in order to prevent twisting of the tail cord 12 in the longitudinal direction. That is, for example, the reinforcing wire 14a is twisted in the S twist direction, and the reinforcing wire 14b is twisted in the Z twist direction opposite to this. And the reinforcement wires 14a and 14b of this Embodiment are each arrange | positioned on the outer side of the assembly line core 13 which parallels.

  The covering layer 15 is also called a sheath and has a function of protecting the assembly wire core 13 and the reinforcing wires 14a and 14b. The coating layer 15 is not particularly limited in its manufacturing method, but is generally formed by extruding a synthetic resin, which is an insulating material, and covering the assembly wire core 13 and the reinforcing wires 14a and 14b.

  The tail cord 12 of the present embodiment is devised so that twisting can be improved after laying. Specifically, when twisting occurs, a part of the coating layer 15 is applied. The openings 16 are formed by cutting, and the reinforcing wires 14a and 14b arranged outside the assembly wire core 13 are exposed. A restoring force, which is a force for returning the twist due to the reinforcement wire 14 being twisted, is transmitted to the tail cord via the covering layer. The difference in restoring force between the reinforcing wires 14a and 14b as a result of variations in the restoring force between products is a cause of twisting of the tail cord 12. Therefore, the exposed portion of the reinforcing wire is reinforced by exposing the portion of the reinforcing wire 14a and 14b where the twist is generated to which the twisted portion is stronger and releasing the fixing of the reinforcing wire 14 by the covering layer 15. By twisting the wire and eliminating the restoring force, the twisting of the tail cord 12 is corrected by bringing the restoring forces of the reinforcing wires 14a and 14b closer to each other. It should be noted that the opening 16 can be easily formed by providing incisions in advance at the excisable portions of the covering layer 15.

  In the present embodiment, the tail cord 12 is connected to the lower end of the car 3 and the junction box 11 when the elevator is installed. At this time, when the functions of the reinforcing wires 14a and 14b that generate rotation forces in opposite directions function and the tail cord 12 is not twisted, as shown in FIG. It is expected that the gap L1 is maintained between the hoistway wall and the car 3 and does not become an obstacle to the elevator.

  On the other hand, due to product variations, the tail cord 12 may rotate in its longitudinal direction even if it has reinforcing wires 14a and 14b that generate rotation forces in opposite directions, and twisting may occur. In this case, as shown in FIG. 3 (b), the gap dimension L2 is provided between the tail cord 12 and the hoistway wall or the car 3, which hinders the operation of the elevator. When the tail cord 12 is twisted in this way, as shown in FIG. 1, the worker cuts a part of the coating layer 15 according to the twist direction to form the opening 16, thereby Reinforcing wires 14a and 14b arranged on the outer side of 13 are exposed. At this time, for example, if the reinforcing wire on the side close to the hoistway wall and the car 3 shown by oblique lines is 14b, the far side is 14a, 14b is S twisted, and 14a is Z twisted, the twisting of the reinforcing wire 14b is relatively strong Because it is a part, this part is exposed. In this way, a part of the covering layer 15 is removed and a part of the reinforcing wires 14a, 14b is released from the covering layer 15, so that the rotation force generated by the reinforcing wires 14a, 14b acts appropriately, and the tail The rotational characteristics of the cord 12 are corrected and the twist is improved.

  Note that the degree of twisting of the reinforcing wire 14 is not necessarily the same in the same product, and there is unevenness in the longitudinal direction. For this reason, there is a situation in which the reinforcing wire 14a is more twisted at the portion in the longitudinal direction of the tail cord, and the reinforcing 14b is twisted more at other portions. In that case, in order to correct the twist of the tail cord 12, as shown in FIG. 1, it is possible that a part of the tail cord 12 exposes 14a and a part 14b exposes 14b. Further, since the twist is uneven in the longitudinal direction, the reinforcing wire may be exposed at a portion where the twist is strong. For example, as shown in FIG. 3 (b), a portion that is below a certain value such as a gap L2 between the hoistway wall and the car 3 may be cut off.

  According to the present embodiment, when the tail cord 12 is twisted, a part of the coating layer 15 is cut off, the reinforcing wires 14a and 14b are exposed to correct the rotational characteristics of the tail cord 12, and the twist Thus, it is possible to cope with twisting without requiring replacement of the tail cord 12, and to reduce costs.

  Further, the reinforcing wires 14a and 14b are respectively arranged on the outer sides of the assembly wires 13 that are arranged in parallel, so that the reinforcing wires 14a and 14b can be easily removed by cutting off the covering layer 15 located on the side end of the tail cord 12. Can be exposed to.

  The above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to the one having all the configurations described. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

3 Car 9 Control device 10 Wiring 11 Junction box 12 Tail cord (flat cable)
13 Assembly wire core 14a, 14b Reinforcing wire 15 Coating layer

Claims (5)

A plurality of assembly wire cores formed by twisting a plurality of insulation-coated wire cores, a pair of reinforcement wires whose twist directions are opposite to each other, and the assembly wire cores and the reinforcement wires are collectively made of an insulating material In a flat cable with a covering layer to cover
The reinforcing wires are arranged outside the assembly wire cores arranged in parallel, and when twisting occurs, a part of the covering layer is cut away to form an opening to expose the reinforcing wires. Characteristic flat cable.   The flat cable according to claim 1, wherein a cut is provided in advance in a portion where the covering layer can be excised. A plurality of assembly wire cores formed by twisting a plurality of insulation-coated wire cores, a pair of reinforcement wires whose twist directions are opposite to each other, and the assembly wire cores and the reinforcement wires are collectively made of an insulating material A method of reducing twisting of a flat cable having a covering layer to be coated,
A part of the covering layer is cut off to expose the reinforcing wires respectively arranged outside the assembly wire cores arranged in parallel, and an opening is formed to be exposed;
A method for reducing twisting of a flat cable, characterized by: 4. The method for reducing twisting of a flat cable according to claim 3, wherein the opening is formed by cutting away the covering layer where the distance between the hoistway wall or the car is equal to or less than a predetermined threshold value. Among the reinforcing wires respectively disposed on the outside of the parallel assembly wires,
Either one is exposed,
The method for reducing twisting of a flat cable according to claim 3.