JPH02265106A - Wire conductor and its manufacture - Google Patents

Abstract

PURPOSE:To improve vibration resistance and bending resistance by arraying element wires in parallel to form a preset width of band structure, which is coaxially wound with an inclination angle to the axial center direction of a tube made of synthetic resin of flexibility to form element wire layers. CONSTITUTION:A preset width of band structure 21 which is formed by arraying element wires 22 in a tape-like parallel is coaxially wound with a preset inclination angle to the axial center direction of a tube 11 to coatingly form an element wire layer 23. Besides, an element wire layer 24 stranded in an opposite direction to the element wire layer 23 with a preset inclination angle to the axial center direction as well as is coated in sequence on the element wire layer 23 to form a multiple of element wire layers 23-25. It is thus possible to improve vibration resistance and bending resistance and supply gas and liquid as well as electric powder.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a conductor for electric wires and a method for manufacturing the same, and particularly to a conductor for electric wires suitable for use in mechatronic machines and the like and a method for manufacturing the same.

<Prior Art> Conventional electric wire conductors are broadly classified into solid wires made of one metal wire and stranded wires made of a plurality of metal wires twisted together.

In the following description, the metal wires constituting the twisted wires are referred to as strands. A large number of strands are bundled and twisted in the same direction, and a number of strands of the same or different configurations are coaxially twisted around one strand. Concentric twisting and further layering of a plurality of wire layers are referred to as composite twisting.

The above-described collectively twisted electric wires are used as conductors for connecting electric appliances, such as general power cords, and in other cases where flexibility is required. Concentrically twisted electric wires are mainly used for power supply wiring such as cabtire cables and welding cables.

Furthermore, composite twisted electric wires are used in places where flexibility is required, such as lead wires of electrical equipment.

In addition to the above, for example, cords for telephones, modular cords, etc., which are made by winding copper wire of about 0.1 mm around 6 threads,
Alternatively, one in which 6 threads are wound with copper foil having a thickness of about 0.023 mm has been used, but none of them could be used for electricity of 100 ν or more.

As described above, conventional conductors for electric wires are mainly used in a stationary state, and even if they do move, the movement is slight, and vibration resistance and bending/stretching resistance are hardly a problem.

However, in recent years, mechatronic machines, such as industrial robots, have components that are constantly moving, such as rotational or reciprocating motion, and as a result, electric wires that can withstand severe vibrations and bending and stretching are now required. There is.

<Problems to be Solved by the Invention> However, it is difficult to meet the above requirements with the conventional conductor structure, and as a solution, it may be possible to shorten the twist pitch L of the strands 51 as shown in FIG. However, this method had its limitations, and it was not possible to obtain a material with vibration resistance and bending/stretching resistance.

In other words, an electric wire conductor 52 in which a plurality of wires 51 are arranged in parallel.
If you twist them, you will get a twisted wire as shown in Figure 4. Furthermore, it is easy to fall into the illusion at first glance that if this stranded wire is twisted, it will turn into horizontal winding as shown in Fig. 5, but in reality, concentric twisting consists of multiple strands surrounding the central strand 53, as shown in Fig. 6. The distance between the wires 51 is set in advance to be slightly larger than the outer diameter d of the wire 51. Therefore, when the predetermined pitch is twisted,
Each strand 51 contacts each other, but if the twisting pitch L is reduced, the inclination angle θ (see Fig. 3) becomes smaller, and the distance between each strand 51 increases, as shown in Fig. 6 ( B)
Each strand 51 is separated from the center strand 53 and is in a floating state as shown in the imaginary line. If the twisting pitch L is made smaller by further tightening from this state, one of the strands 51 will deviate from the strand layer 54 (see Fig. 3), as shown by the imaginary line in Fig. 6(C). As a result, conventional conductor structures have twisting limitations.

In addition, in collective twisting, if the twist pitch I is made small, the wire becomes hard, like a tightly wrung towel, and has properties similar to that of a single wire, making it more likely to break.

As described above, the conventional conductor structure has a problem in that it is difficult to apply it to electric wires that require vibration resistance and bending/stretching resistance.

An even more important issue is that, for example, between a robot hand and its operation part, in addition to electric wires that supply power, tubes that supply compressed air and oil as power sources are connected. Like the electric wire, it vibrates violently and bends and stretches, so it requires a lot of space. Therefore, it is desired to make these compact.

However, there is no suitable electric wire conductor that meets the above requirements.

Furthermore, conventional stranded wire conductors are manufactured by rotating and twisting a plurality of strands forming a strand layer around a central strand, and therefore have a drawback of slow lamination speed.

The present invention has been devised in view of the above circumstances, and the first invention aims to provide a novel conductor for electric wires that has excellent vibration resistance and bending/stretching resistance, and is capable of supplying gas or liquid at the same time as electric power. A second object of the present invention is to provide a method for manufacturing an electric wire conductor with a high lamination speed.

<Means for Solving the Problems> The electric wire conductor according to the first invention is made of a flexible duplex made of synthetic resin or the like and a band-shaped body formed by aligning a plurality of wires in a predetermined width. The present invention is characterized in that the band-shaped body is coaxially wound around the outer periphery of the tube at a predetermined inclination angle with respect to the axial direction of the tube to form a plurality of strand layers having mutually different twist directions.

A method for manufacturing a conductor for electric wires according to the second invention includes inserting a flexible tube made of synthetic resin or the like into an insertion hole of a cylindrical member having a predetermined length, aligning a plurality of strands of wire to a predetermined width. while forming a first strand layer by coaxially winding the band-shaped body formed at a predetermined inclination angle with respect to the axial direction of the cylindrical member, pulling it together with the tube in the winding direction; Next, the second strand layer is wound with another strip in different twisting directions while being pulled, and the winding and pulling operations are sequentially repeated to form a predetermined strand layer. It is characterized by

<Function> In the first invention, since the strips of the strands forming the strand layer are concentrically twisted, the strands do not separate from the tube and float up. It is also possible to pass air or gas through the tube.

In the second invention, by winding the strip and pulling the tube, layers are formed on the outer periphery of the tube by repeating the same number of strands as the number of wire layers.

<Example> Hereinafter, an example according to the present invention will be described with reference to the drawings. FIG. 1 is an enlarged perspective view for explaining the structure of the electric wire conductor, and FIG. 2 is an enlarged cross-sectional perspective view of a main part for explaining the manufacturing method of the electric wire conductor.

11 is a flexible tube made of synthetic resin such as plastic or rubber, and 21 is a band-like body formed by arranging a plurality of wires 22 in a tape shape to have a predetermined width. This strip-shaped body 21 is wound coaxially at a predetermined inclination angle with respect to the axial direction of the tube 11 to form a covering layer 23 of strands.

Further, a strand layer 24 is placed on the strand layer 23 with the twist direction opposite to that of the strand layer 23 and at a predetermined inclination angle with respect to the axial direction as described above.
... are sequentially coated to form an electric wire conductor 10 in which a plurality of wire layers are overlapped.

This electric wire conductor 10 can supply compressed air or oil to a mating machine connected to it via a tube 11.

Next, a method for manufacturing the electric wire conductor will be explained with reference to FIG. 2.

First, the tube 11 is inserted into a cylindrical member 31 having a predetermined length through which the insertion hole 32 is inserted, and the band-shaped body 21 is wound around the outer peripheral surface of the cylindrical member 31 in the same manner as with tape, as shown by the arrow. A pulling operation is performed together with the tube 11 in the winding direction.

The band-shaped body 21 that has been wound to form the first strand layer 23 slides on the outer peripheral surface of the cylindrical member 31 and is pulled in the pulling direction.

Next, the strip 21 on which the strand layer 23 has been formed together with the tube 11 is pulled back in the opposite direction, and the operation of winding the second strand layer 24 with another strip 21 is repeated in sequence along with the pulling operation to obtain a predetermined result. The electric wire conductor 10 is manufactured by forming a wire layer.

<Effects of the Invention> As explained above, the electric wire conductor according to the first invention has the following features:
A plurality of wires are arranged in parallel to form a strip of a predetermined width, and this strip is wound coaxially at an angle of inclination to the axial direction of a tube made of flexible synthetic resin to form a plurality of wires. Since it is configured to form a wire layer, it is possible to provide a conductor for electric wires that has excellent vibration resistance and bending/stretching resistance, and can sufficiently withstand even when used in mechatronic machines that move rapidly.

Furthermore, by passing gas or liquid through the tube, it is possible to simultaneously supply electric power, which is very convenient. Further, in the manufacturing method according to the second invention, as shown in FIG. 2, it is manufactured by winding a tape-like band around a cylindrical member. Therefore, the lamination speed is high and productivity can be improved.

[Brief explanation of drawings]

Figures 1 and 2 are drawings according to the present invention, where Figure 1 is an enlarged perspective view for explaining the structure of a conductor for electric wires, and Figure 2 is a main part for explaining the method for manufacturing the conductor for electric wires. 3 to 6 are drawings related to the prior art; FIG. 3 is an enlarged perspective view illustrating a twisted state of a conductor for electric wire; FIG. 4;
FIG. 5 is an external front view illustrating concentric twisting, and FIG. 6 is a sectional view showing the state of deformation of the wire layer due to the action of tightening force. 10... Electric wire conductor 11... Tube 21... Band-shaped body 22... Element wire 23, 24... Element wire layer 31... Cylindrical member 32...・Insertion hole patent applicant Ken Nibe Parent agent Patent attorney Takaharu Ohnishi■

Claims (2)

[Claims] (1) Consisting of a flexible tube made of synthetic resin or the like and a band-like body formed by arranging multiple strands of wire to a predetermined width,
A conductor for an electric wire, characterized in that the band-shaped body is coaxially wound around the outer periphery of the tube at a predetermined inclination angle with respect to the axial direction of the tube to form a plurality of strand layers having mutually different twist directions. . (2) A flexible tube made of synthetic resin or the like is inserted into the insertion hole of a cylindrical member having a predetermined length, and a band-like body made of a plurality of wires arranged in parallel to form a predetermined width is inserted into the insertion hole of the cylindrical member. While coaxially winding at a predetermined inclination angle with respect to the axial direction to form a first strand layer, the tube is pulled together with the tube in the winding direction, and then the second strand layer is formed into another strip. A method for manufacturing a conductor for an electric wire, characterized in that a predetermined layer of strands is formed by winding and pulling the wire so that the twist directions are different from each other, and repeating the winding and pulling in sequence.