JPH08180743A - Multi-core adhered parallel cable - Google Patents

Abstract

PURPOSE: To enlarge the restoring force from deformation such as bending or twisting and heighten the mechanical strength by arranging wire material having a tensile strength over a specified value in at least part of an insulated element wire. CONSTITUTION: A plurality of insulated element wires 10 and insulated metal wires 20 are parallel laid in alignment and adhered together by an adhesive layer 23. On the metal wires 20, an insulative covering 22 consisting of the same insulative coating as the insulating layer 12 is formed on metal wire material 21 having a large tensile strength, and the tensile strength of the wire 21 is made over 500 MPa. The wires 20 function as a tension member by consolidating the wires 20 consisting of the wires 21 having a higher tensile strength with the element wires 10 so that the restoring force from deformation of multi- core parallel adhered wires themselves such as bending or twisting is enhanced. Thus the mechanical strength is increased. compared with conventional multi- core adhered parallel wires consisting solely of element wires 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-core parallel adhesive wire used for coils and wiring of various telecommunications equipment, and has improved resilience against deformation such as bending and twisting.

[0002]

2. Description of the Related Art FIG. 3 shows a cross section of a conventional multi-core parallel adhesive wire, in which reference numeral 11 is a conductor, reference numeral 12 is an insulating layer, and reference numeral 13 is an adhesive layer. Generally, annealed copper is used as the metal material forming the conductor 11. The insulating layer 12 is made of an insulating paint such as polyvinyl formal, polyester, polyurethane, polyester imide, polyamide imide, epoxy, polyimide and modified types thereof, and the adhesive layer 13 is made of nylon 6, nylon 6-6, nylon. 6-10, nylon 1
Adhesive resins such as polyamides such as 1 and nylon 12, ethylene-vinyl acetate copolymer, aromatic polyamide, saturated polyester (PET), phenoxy (epoxy resin) and polysulfone resin are used. In such a multi-core parallel adhesive wire, an insulating coating is applied on the conductor 11 and baked to form the insulating layer 12 to form the insulating element wire 10. After the insulating element wires 10 are aligned in parallel, This is coated with an adhesive resin to form an adhesive layer 13, and these insulating wires 10 are adhesively integrated.

[0003]

Such a multi-core parallel adhesive wire is required to have a smaller diameter as the equipment in which it is used is made smaller and mounted at a higher density. However, when the diameter of the conductor 11 is reduced, the restoring force for mechanical deformation such as bending and twisting of the multi-core parallel bonding wire is reduced. Therefore, there is a limit to use the multi-core parallel bonding wire by connecting it to the movable part, and the conductor 11 may be broken by the tension during winding.

The present invention has been made in view of these circumstances, and an object thereof is to provide a multi-core parallel adhesive wire having improved mechanical strength and improved restoring force against deformation such as bending and twisting. I am trying.

[0005]

In order to solve the above-mentioned problems, the multi-core parallel adhesive wire of the present invention has a structure in which a plurality of insulating element wires having an insulating layer formed on a conductor are bundled in parallel and in a row and integrated. In the multi-core parallel bonded wire described above, a wire having a tensile strength of 500 MPa or more is arranged on at least a part of the insulating wire.

The present invention will be described in detail below with reference to the drawings. FIG. 1 shows a cross section of a multi-core parallel bonding wire according to the present invention. FIG. 1A shows a first example of a multi-core parallel adhesive wire of the present invention, in which a plurality of insulating element wires 10 and insulating metal wire materials 20 are aligned in parallel and bonded and integrated by an adhesive layer 23. It was done. The insulated wire 10 has the same structure as that used in the conventional multi-core parallel bonded wire shown in FIG. 3, and the conductor 11 made of annealed copper is polyvinyl formal, polyester, polyurethane, polyester imide, polyamide imide, It is covered with an insulating layer 12 made of an insulating coating material such as epoxy, polyimide and modified types thereof.

The insulating metal wire 20 is formed by forming an insulating coating 22 made of the same insulating paint as the insulating layer 12 on a metal wire 21 having a large tensile strength. The tensile strength of the metal wire 21 is set to 500 MPa or more, and if this value is 500 MPa or less, the demand for improvement in mechanical strength in the present invention cannot be satisfied. As a material forming the metal wire 21, a hard copper, a copper alloy, or an iron alloy such as stainless steel is suitable. Examples of the copper alloy include Cu- (0.08 to 0.25)% Ag alloy and Cu- (2 to 4)% S.
Mention may be made of phosphor bronze obtained by adding (0.03 to 0.05)% P to an n alloy, and Cu- (0.5 to 2.5)% Be alloy.

When this metal wire rod 21 is used as a conductor, in addition to having a tensile strength of 500 MPa or more,
It is preferable that the conductivity is 60% IACS (relative to standard copper) or more. The wire diameter of the metal wire rod 21 is 30 to 3
It is preferably used in the range of 00 μm, but is not particularly limited to this range. The insulating coating 22 is formed by coating and baking the insulating coating material for forming the insulating layer 12 by a conventional method, and the coating thickness is usually 5 to 50 μm, but may be outside this range.

The same adhesive resin as the adhesive layer 13 of the conventional multi-core parallel adhesive wire can be used for the adhesive layer 23 that adheres and integrates the insulating element wire 10 and the insulating metal wire material 20. The multi-core parallel adhesive wire shown in FIG.
And the insulating wires 10 are alternately aligned and bonded and integrated, but these arrangements can be arbitrarily selected. Moreover, the number of each of the insulating metal wire 20 and the insulating element wire 10 to be incorporated into one multi-core parallel bonding wire can be arbitrarily determined according to the required mechanical strength.

In such a multi-core parallel bonded wire, the insulating metal wire 20 composed of the metal wire 21 having high tensile strength and the insulating element wire 10 are bonded and integrated to obtain insulation. The metal wire 20 functions as a tension member, and the restoring force for bending and twisting of the multi-core parallel bonding wire itself can be improved. Therefore, the insulated wire 1
Mechanical strength can be increased as compared with a multi-core parallel adhesive line consisting of only 0. Further, if the metal wire rod 21 of the insulating metal wire rod 20 is also excellent in conductivity, the insulating metal wire rod 2
0 can be used in the same manner as the insulating wire 10, and a multi-core parallel bonded wire having excellent mechanical strength and a small diameter can be obtained.

FIG. 1 (b) shows a second example of the multi-core parallel bonding wire, which includes the metal wire 21 and the insulating wire 10.
And are alternately aligned and integrated with an adhesive resin. This metal wire 21 is for improving the mechanical strength of the multi-core parallel bonding wire, and does not function as a conductor. Therefore, unlike the example shown in FIG. 1 (a), such a multi-core parallel bonding line
Since it is not necessary to form an insulating coating on the metal wire 21,
The manufacturing process can be simplified and the manufacturing cost can be reduced.

FIG. 1 (c) shows a third example of a multi-core parallel bonding wire, in which a high elastic modulus fiber 30 having a tensile strength of 500 MPa or more is bonded together with the insulating wire 10 with a bonding resin. It is an integrated one. Specific examples of the material of the high elastic modulus fiber 30 include aramid fiber, polyester fiber, carbon fiber, polyethylene fiber, polypropylene fiber, nylon fiber, aromatic polyamide (Kevlar) fiber, steel fiber and the like. The diameter of the high elastic modulus fiber 30 is 30
˜300 μm is preferred, but it may be outside this range.

FIG. 1 (d) shows a fourth example of a multi-core parallel adhesive wire, in which only a plurality of insulating metal wires 20 made of a metal wire 21 functioning as a conductor are aligned in parallel and bonded together. It has been transformed. In such a multi-core parallel bonded wire, when compared by the number of concentricity, a multi-core parallel bonded wire having a mechanical strength superior to that of the embodiment shown in FIG. 1A can be obtained.

(Experimental Example) An example and a comparative example relating to the multi-core parallel adhesive wire of the present invention were prepared and the restoring force against bending was compared. The multi-core parallel adhesive wire of the comparative example has a diameter of 0.10 m.
Insulating element wires are formed by forming an insulating layer using urethane on a conductor made of soft copper of m, and 25 insulating element wires are aligned in parallel and bonded and integrated using alcohol-soluble nylon.

The multi-core parallel bonded wire of Example 1 is obtained by bonding 24 insulating wires used in the comparative example and one piano wire together using alcohol-soluble nylon as in the comparative example. Is. The piano wire used in this example had a tensile strength of 1050 MPa. In addition, the multi-core parallel adhesive wire of Example 2 is obtained by adhesively integrating 20 insulating wires and 5 piano wires in the same manner as in Comparative Example and Example 1.

For these multi-core parallel adhesive lines, the restoring force against bending was measured. 2 (a) and 2 (b)
Shows an outline of this measuring method, in which the prepared multi-core parallel bonding wire 40 is horizontally arranged on the base 41 so that one end thereof protrudes from the side wall surface 41a of the base 41, and the fixing member 4
It was fixed so as to be sandwiched from above with 2. Side wall surface 41a of the base 41
The tip of the multi-core parallel bonding wire 40 protruding from the end has a bent portion 40a bent at a right angle upward.
It is easy to hang the weight 43 on 0a. The distance from the bent portion 40a to the side wall surface 41a of the platform 41 was 40 mm in all cases.

The measurement was performed according to the following procedure. Figure 2
As shown in (a), a 2 g weight 43 was hung on the bent portion 40a of the multicore parallel adhesive wire 40 arranged as described above to bend the multicore parallel adhesive wire 40 downward. After 60 seconds, the weight 43 is removed from the bent portion 40a, and as shown in FIG.
As shown in, the restoring force of the multi-core parallel bonding wire 40 itself restored the bent state to the original state. After a certain time, the height difference of the bent portion 40a before and after suspending the weight 43,
That is, the flexure length L was measured. This measurement was repeated 5 times for each multicore parallel adhesive line 40, and the average was obtained. Table 1 shows the measurement results.

[0018]

[Table 1]

As shown in the above table, in the multi-core parallel bonded wire incorporating the piano wire, the bending length was reduced as compared with the comparative example consisting of only the insulating wire. In addition, Example 1 and Example 2
Comparing with, the bending length decreases as the number of built-in piano wires increases, and especially in Example 2 in which the number of cores of the piano wire is 20% of the whole, It has been reduced to less than half the deflection length. Therefore,
It was shown that the incorporation of a wire material having a high tensile strength in the multi-core parallel bonded wire improves the mechanical strength and has a strong restoring force against bending.

[0020]

EFFECTS OF THE INVENTION The multi-core parallel bonded wire of the present invention has a structure in which a part or all of the insulating element wire is replaced with a wire material having a tensile strength of 500 MPa or more. It is possible to provide a multi-core parallel bonding wire having improved mechanical strength and excellent mechanical strength.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a multi-core parallel adhesive wire of the present invention.

FIG. 2 is a schematic view showing a measuring method for measuring a flexure length of a multi-core parallel adhesive line, which is performed in an experimental example.

FIG. 3 is a cross-sectional view showing a conventional multi-core parallel adhesive line.

[Explanation of symbols]

10 ... Insulating element wire, 20 ... Insulating metal wire material, 21 ... Metal wire material, 22 ... Insulating coating, 23 ... Adhesive layer, 30 ... High elastic modulus fiber.

Claims (1)

[Claims] 1. A multi-core parallel bonding wire in which a plurality of insulating wires having an insulating layer formed on a conductor are bundled in parallel and aligned in a row, and at least a part of the insulating wires has a tensile strength of 500 MPa.
A multi-core parallel bonded wire comprising the above wires.