JPS5958712A - Method of producing screen cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a spring cable, and particularly to a method of manufacturing a spring cable using a metal spring.

Spring cables or cords are widely used for power and signal supply of moving or rotating parts. Especially recently, there has been a lot of demand for cables for rosettes, and there has been a strong demand for smaller cables and for single-person use at high temperatures.

Generally, the spring force of a spring cable utilizes restoring force due to compositional deformation of vinyl resin, urethane resin, or the like. Unfortunately, the thickness of the vinyl resin or urethane resin sheath cannot be made thinner due to the spring force, which is a major obstacle to miniaturizing the spring cable.

In addition, the restoring force of these materials due to compositional deformation is extremely small at high temperatures, and sufficient care must be taken when using them at high temperatures of 40° or higher.

In particular, when used for vertical expansion and contraction, the upper part stretches out and loses its restoring force, causing it to lose its function as a spring cable.

Therefore, when using spring cables in high-temperature conditions or downsizing them, it is possible to use the spring force of metals and minerals, but conventional methods have been to attach the cables to metals and springs and wrap them with tape to integrate them. Because of this, a large amount of man-hours are spent on manufacturing it.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide a method for efficiently manufacturing a spring cable using metal springs at low cost.

That is, the present invention provides a spring cable characterized by forming a cable having a side groove into which a metal spring is inserted, and heat-sealing the side groove after or while inserting a metal ζ spring into the (1111 groove). This is the manufacturing method.

The present invention will be specifically described below with reference to the drawings.

FIG. 1 is a cross-sectional view of two embodiments of a cable having a preformed metal S-ring insertion groove according to the present invention. After the required number of cores 3 are twisted together, the cores 3 are extruded and covered with a plastic sheath 2 to form a cable. In this case, the ff9t into which the metal spring is inserted is provided integrally with the plastic sheath of the cable and equally spaced in the longitudinal direction of the cable (this is referred to as a gutter in the present invention).
. The structure of the side gutter may be as shown in Figure 1A, where the plastic sheath protrudes from the cable body, or as shown in Figure 1B, where a part of the sheath of the cable body is thickened. Tonashi, to that part? 111i (jl, structure may also be used.Also, although FIG. 1 shows a structure in which a side gutter is provided in one place, the present invention is not limited to this.
A plurality of side gutters may be provided as necessary. Thick groove LL
Decide as appropriate depending on the thickness of the metal spring to be inserted.

Next, a metal ξ wire is inserted into the thus formed cable with side grooves 1 as shown in FIG.

FIG. 3 shows the structure of the spring cable after the metal wire 4 has been inserted into the side groove.

Next, the groove portions are heat-fused to complete the spring cable. There are various methods for heat-sealing the groove portion depending on the structure of the spring cable, the quality of the sheath, etc., and the most suitable method may be used depending on each case.

For example, the embodiment shown in Fig. 3 shows a state in which a metal screw is inserted into a side groove provided inside a coiled spring cable. Insert a heater shaped like a vertically halved Izo into the inside of the spring cable, expand the diameter of the heater, and heat and fuse the open part of the Tsukuda rt'i with a slight pressure applied.

Note that in this case, current may be passed through the metal spring and electrical heating may also be used.

In addition, the position of the side groove part may be configured so that it is located between the cable bodies as shown in FIG. It may be configured so that it is located on the sides f, l, lI on the outside of the.

Still, in the above embodiment, an example was shown in which the side groove part is heated and fused after the metal spring is inserted into the groove, but in the present invention, the side groove part is heated and fused while the metal spring is inserted into the side groove. You may wear it.

The present invention has the following effects.

(1) Spring cables using metal wires can be manufactured efficiently at low cost. 1 (2) Even if metal/S/S is used, there is no need to wrap it around the cable with tape as in the past, it is simple, can be used over a wide range of temperatures, and can be used as a sheath or insulator. It is possible to manufacture a spring cable that can be used at a rated temperature of 11.

[Brief explanation of the drawing]

1A and 1B are cross-sectional views showing two embodiments of a cable having a pre-formed metal spring insertion groove according to the present invention;
Fig. 2 is an explanatory diagram showing how the metal wire is inserted into Tsukuda 7iff, Fig. 3 is a partial perspective view showing one aspect of the spring cable after inserting the metal/S. FIG. 5 is a partial perspective view showing another embodiment of the spring cable obtained according to the present invention. 1...Metal screw insertion groove, 2...Plastic sheath, 3...Core, 4...Gold Jb4 spring.斥 1 San Z closed soup 40 No. 312] We 50

Claims (1)

[Claims] (1) A method for manufacturing a spring cable, which comprises forming a cable having a side groove into which a metal spring is inserted, and heat-sealing the side groove after or while inserting a metal spring into the side groove.