JP2019160668A - Stranded wire conductor, and wire - Google Patents

Abstract

To provide an inexpensive stranded wire conductor excellent in conductivity.SOLUTION: In a stranded wire conductor constituted of concentric stranded wires 10 formed by concentrically stranding a plurality of plated wires 13 each having plating 12 on the surface of a wire 11, plated wires constituting the outermost layer of the concentric stranded wires each have silver plating on the surface of each wire, and plated wires constituting a layer on the furthermore inside than the outermost layer of the concentric stranded wires each have tin plating.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a stranded wire conductor.

  In electric wires and cables, stranded conductors made by twisting strands made of copper are used. For example, Patent Document 1 discloses the use of a stranded wire conductor having silver plating on the outer periphery of each wire made of copper as a conductor used for a cable wired to a movable part. And in patent document 1, compared with the strand wire conductor which twisted each strand which has a tin plating by using the strand wire conductor which twisted each strand which has such a silver plating, it is high electroconductivity. Is supposed to be obtained.

JP 2002-352639 A

  Electric wires and cables used in electronic equipment, sound, and aircraft are desired to have high conductivity. Therefore, the conductor which comprises an electric wire and a cable may use the strand wire conductor which twisted together the several silver plating wire which has silver plating on the surface of the strand which consists of tough pitch copper or oxygen-free copper. However, although such a stranded wire conductor is a conductor having higher conductivity (lower conductor resistance) than a stranded wire conductor obtained by twisting each strand having tin plating, the cost is also increased.

  Accordingly, the present invention has been made in view of the above points, and an object thereof is to provide an inexpensive stranded wire conductor having excellent conductivity.

  In order to achieve the above object, one embodiment of the present invention provides the following stranded wire conductor.

[1] Consists of concentric stranded wires in which a plurality of plated wires having plating on the surface of the strands are concentrically twisted, and the plated wires constituting the outermost layer of the concentric stranded wires are silver on the surface of the strands. A stranded wire conductor having plating, wherein the plated wire constituting the inner layer of the outermost layer of the concentric stranded wire has tin plating on the surface of the strand.
[2] The stranded wire conductor according to [1], wherein the inner layer is formed of a stranded wire.
[3] A stranded wire conductor and a concentric stranded wire having an insulation coating around the stranded wire conductor, and the stranded wire conductor is formed by concentrically twisting a plurality of plated wires having plating on the surface of the strand. The plated wire constituting the outermost layer of the concentric stranded wire has silver plating on the surface of the strand, and the plated wire constituting the inner layer of the outermost layer of the concentric stranded wire is the An electric wire having tin plating on the surface of the element wire.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in electroconductivity and can provide an inexpensive strand wire conductor.

(A) is a schematic cross-sectional view which shows an example of the strand wire conductor which concerns on this Embodiment, (b) is a schematic cross-sectional view of the plating wire which comprises the strand wire conductor which concerns on this Embodiment. is there. It is a schematic cross-sectional view which shows an example of the electric wire which concerns on this Embodiment.

[Stranded wire conductor]
First, the stranded wire conductor according to the present embodiment will be described. Fig.1 (a) is a schematic cross-sectional view which shows an example of the strand wire conductor which concerns on this Embodiment, FIG.1 (b) is the outline of the plating wire which comprises the strand wire conductor which concerns on this Embodiment. It is a cross-sectional view.

  As shown in FIGS. 1A to 1B, the stranded wire conductor 10 according to the present embodiment is a concentric strand formed by concentrically twisting a plurality of plated wires 13 having plating 12 on the surface of the strand 11. The plated wire 13a that is composed of a wire and forms the outermost layer of the concentric stranded wire has silver plating on the surface of the strand 11, and constitutes a layer inside the outermost layer of the concentric stranded wire (hereinafter also referred to as an inner layer) The plated wire 13b to be formed has tin plating on the surface of the strand 11.

  The concentric stranded wire constituting the stranded wire conductor 10 preferably has a twist pitch of 20 times or less the layer core diameter. At this time, the twist pitch of the plated wire 13a constituting the outermost layer is 20 times or less of the layer core diameter, and the twist pitch of the plated wire 13b constituting the inner layer is equal to or less than the twist pitch of the plated wire 13a constituting the outermost layer. It is preferable that

  Further, the concentric stranded wires constituting the stranded wire conductor 10 may have the same or different twist directions in the plated wire 13b constituting the inner layer and the plated wire 13a constituting the outermost layer.

  In the stranded wire conductor 10, when the plated wire 13b constituting the inner layer and the plated wire 13a constituting the outermost layer have the same twist pitch, even if the twist directions are different, they are twisted together and concentric stranded wires. Is manufactured. On the other hand, when the plating wire 13b constituting the inner layer and the plating wire 13a constituting the outermost layer have different twist pitches in the same twist direction, the plating wire 13b constituting the inner layer and the plating wire 13a constituting the outermost layer are combined. Concentric stranded wires are manufactured in separate stranded wire steps (that is, a step of twisting the inner layer plated wire 13b and a step of twisting the plated wire 13b constituting the outermost layer in different twist directions on the inner layer). At this time, the inner layer may be formed of a stranded wire formed by concentrically twisting a plurality of plated wires 13b.

  In the stranded wire conductor 10, the strand 11 is made of a copper wire made of pure copper such as tough pitch copper or oxygen-free copper. The plated wire 13 (13a, 13b) has an outer diameter of 0.01 mm to 0.40 mm, for example. Furthermore, the outer diameter of the stranded wire conductor 10 is, for example, about 0.2 mm to 4.0 mm. In addition, as for the strand wire conductor 10, each of the plating wires 13a and 13b may be lightly compressed.

  The inner layer constituting the concentric stranded wire is composed of, for example, about 1 to 30 plated wires 13b. For example, as shown in FIG. 1, when the inner layer is composed of seven plated wires 13b, the concentric stranded wire has an outermost layer composed of twelve plated wires 13a arranged around the plated wire 13b constituting the inner layer. Is done. At this time, if the twist pitches of the inner layer plating wire 13b and the outermost layer plating wire 13a are the same, the plating wire 13b (tin plating wire) constituting the inner layer and the plating wire 13a (silver plating wire) constituting the outermost layer are formed. ) Are collectively twisted to produce a concentric stranded wire. On the other hand, if the twist pitches of the inner layer plated wire 13b and the outermost layer plated wire 13a are different, the seven plated wires 13b (tin plated wires) constituting the inner layer are twisted together at a predetermined twist pitch. After forming the wire, the stranded wire and the 12 plated wires 13b (silver plated wire) constituting the outermost layer are twisted together to produce a concentric stranded wire.

  In addition, in FIG. 1, although demonstrated by the example formed by twisting the seven plating wires 13b as a strand wire which comprises an inner layer, it is not limited to this, For example, three, four, seven A twisted wire can be formed by concentrically twisting the plated wire 13 composed of 14, 19, 26, or 30 wires. Moreover, the number of the plating wires 13a constituting the outermost layer can be appropriately selected from the number of, for example, 6 to 20 according to the number of the plating wires 13b constituting the inner layer.

〔Electrical wire〕
FIG. 2 is a schematic cross-sectional view showing an example of the electric wire according to the present embodiment.

  The electric wire 20 according to the present embodiment includes a stranded wire conductor 10 and an insulating coating 14 that is provided on the outer periphery of the stranded wire conductor 10 and covers the stranded wire conductor 10. As the stranded conductor 10, the above-described concentric stranded wire shown in FIG. 1 is applied. The insulating coating 14 is formed by extrusion coating a resin having insulating properties on the outer periphery of the stranded conductor 10.

[Effect of the embodiment]
According to the present embodiment, the plated wire 13b having silver plating is applied only to the strand 11 constituting the outermost layer, instead of applying the plated wire having silver plating to the entire outer periphery of each strand 11. As a result, it is possible to have higher conductivity (a conductor resistance can be reduced) compared to a stranded wire conductor obtained by twisting a plated wire having tin plating on the entire outer periphery of each strand 11, and each element. The stranded wire conductor 10 can be provided at a lower cost than a stranded wire conductor in which plated wires having silver plating are twisted around the entire outer periphery of the wire 11.

Example 1
In Example 1, the stranded wire conductor shown in FIG. 1 was manufactured. Specifically, the surface of a strand made of pure copper having a circular cross section is tin-plated, and seven plated wires (tin-plated wires) having an outer diameter of 0.08 mm are prepared. Twelve plating wires (silver plating wires) having a silver plating on the surface of a strand made of circular pure copper and having an outer diameter of 0.08 mm were prepared. These tin-plated wires and silver-plated wires are twisted together by concentric twisting, so that the outermost layer of 12 silver-plated wires is concentric on the outer periphery of a concentric twisted wire consisting of 7 tin-plated wires. A concentric stranded wire having an outer diameter of 0.4 mm arranged by twisting was manufactured, and this was used as a stranded wire conductor. In addition, the twist pitch when twisting together a concentric strand by a concentric twist was 20 times or less of the layer core diameter.

(Comparative Example 1)
In Comparative Example 1, a stranded wire conductor was produced by the same method as in Example 1 except that the silver-plated wire of Example 1 was changed to a tin-plated wire. Specifically, nineteen plated wires (tin-plated wires) having tin plating on the surface of the strand made of pure copper having a circular cross section and an outer diameter of 0.08 mm were prepared. By twisting these tin-plated wires together by concentric twisting, the outermost layer of 12 tin-plated wires is arranged concentrically on the outer periphery of the concentric twisted wire whose inner layer is composed of seven tin-plated wires. A concentric stranded wire having an outer diameter of 0.4 mm was manufactured and used as a stranded wire conductor. In addition, the twist pitch when twisting together a concentric strand by a concentric twist was 20 times or less of the layer core diameter.

(Evaluation of conductivity)
The conductivity was evaluated based on the conductor resistance in the stranded wire conductors of Example 1 and Comparative Example 1. The conductor resistance of Example 1 was 183.6 Ω / km, and the conductor resistance of Comparative Example 1 was 186.9 Ω / km.

  Although the embodiments and examples of the present invention have been described above, the present invention is not limited to the above-described embodiments and examples, and various modifications can be made without departing from the spirit of the invention.

  The embodiments and examples described above do not limit the invention according to the claims. It should be noted that not all combinations of features described in the embodiments and examples are necessarily essential to the means for solving the problems of the invention.

10 Stranded conductor (concentric stranded wire)
11 Wire 12 Plating 13 Plating Wire 14 Insulation Coating 20 Electric Wire

Claims (3)

  A plurality of plated wires having plating on the surface of the strand are concentrically twisted, and the plated wire constituting the outermost layer of the concentric strand has silver plating on the surface of the strand. And the stranded wire conductor in which the said plating wire which comprises the layer inside the said outermost layer of the said concentric strand wire has tin plating on the surface of the said strand.   The stranded wire conductor according to claim 1, wherein the inner layer is formed of a stranded wire. A stranded conductor and an insulation coating around the stranded conductor;
The stranded wire conductor is composed of a concentric stranded wire formed by concentrically twisting a plurality of plated wires having plating on the surface of the strand, and the plated wire constituting the outermost layer of the concentric stranded wire is the strand of the strand. The electric wire which has silver plating on the surface, and the said plating wire which comprises the inner layer from the said outermost layer of the said concentric strand wire has tin plating on the surface of the said strand.

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