JP7265812B1 - stranded conductor - Google Patents

Abstract

A stranded conductor that can be manufactured to have a cross-sectional shape close to a perfect circle without being compressed or with a low compressibility. A plurality of large-diameter wires 2 are spaced apart in the circumferential direction, and two first large-diameter wires thinner than the large-diameter wires 2 are placed between the adjacent large-diameter wires 2, 2 in the circumferential direction. The small diameter wires 3, 3 are spaced apart, and two second small diameter wires 4, 4 thinner than the large diameter wire 2 are arranged between the first small diameter wires 3, 3. An inner large-diameter wire 5 is arranged inside a valley portion 15 of two second outer small-diameter wires 4, 4 adjacent in the direction, and a plurality of the inner large-diameter wires 5 are arranged at intervals in the circumferential direction. Two inner thin wires 6, 6 thinner than the inner thick wire 5 are arranged in the circumferential direction between the inner thick wires 5, 5 adjacent to each other in the circumferential direction. An inner layer 14 was provided radially inside the stranded conductor 1 in the radial wire 6 . [Selection drawing] Fig. 1

Description

The present invention relates to stranded conductors.

Conventionally, each element wire constituting a stranded conductor used for an electric wire or the like is generally a round wire with a circular cross section and the same diameter. A copper wire is mainly used as the element wire, and the copper wire is plated with various alloys such as tin, nickel, silver, or aluminum.

For example, a stranded conductor that is concentrically stranded and composed of 19 strands generally has a single strand 102 at the center of the stranded conductor 101 as a nucleus, as shown in FIG. , 6 strands 103 surround it to form an inner layer, and further, 12 strands 104 surround its periphery to form an outer layer, which are then twisted in the same direction. ing. In addition, the stranded conductor 101 has a concentrically twisted stranded conductor composed of 37 strands surrounded by 18 strands, and further, the outer periphery is covered and surrounded by 24 strands. A concentric stranded conductor consisting of only 61 strands has also been used.

Since the strands 102, 103, and 104 all have a circular cross section and the same diameter, when the strands 102, 103, and 104 are arranged in the standard core arrangement to form the stranded conductor 101, the outer peripheral shape As shown in FIG. 6, the shape approximates a hexagon, and does not approximate a circular shape. Hereinafter, this is referred to as prior art 1.

In general, as shown in FIG. 6, the stranded conductor 101 is used as an electric wire (coated wire) or the like 107 with an insulating material 106 covering the outer periphery thereof. Reducing the weight of the insulating material 106 is important from the viewpoint of effective utilization of resources, and for this reason, it is desired that the cross-sectional shape of the stranded conductor be a perfect circle.

However, if the stranded conductor is configured by 19 concentrically twisted wires of the same diameter, the stranded conductor 101 has a hexagonal cross-sectional profile as shown in FIG. The thickness of the material 106 is thin in the vicinity of the apex and increases from the apex to the side, so that the thickness of the insulating material 106 is non-uniform. In addition, in order to prevent the breakdown voltage failure, the thickness of the insulating material 106 at the vertex becomes a standard, and the thickness of the insulating material 106 at the side becomes redundant and useless. A circle is desired.

Moreover, since the cross-sectional shape of the stranded conductor 101 is hexagonal, there is a problem that the stranded conductor 101 may be damaged when the insulating material 106 is stripped in the end processing of the coated wire or the like.

It is also desired that the cross-sectional shape of the stranded conductor be a perfect circle in a bundled stranded wire other than the concentric twist arrangement. It is also important from the standpoint of electrical characteristics such as withstand voltage to uniformly coat the stranded conductor with the insulating material.

As a method of making the cross-sectional shape of the stranded conductor a perfect circle, for example, as described in Patent Document 1, strands 202 having a circular cross-section and all having the same diameter are twisted in one direction and passed through a compression die. , as shown in FIG. 7, a method has been proposed in which the cross-sectional shape of the stranded conductor 201 is made substantially circular. Hereinafter, this is referred to as prior art 2.

JP-A-11-25758

In the stranded conductor 201 of prior art 2, when the strands 202 are passed through the compression die, the outer layer strands are compressed and deformed, resulting in loss of physical properties such as stretchability, flexibility, and flexibility. There is a problem.

In addition, since the stranded conductor 201 of the prior art 2 needs to be passed through a compression die while being twisted in one direction, an extra compression die is required compared to the stranded conductor 101 of the prior art 1. Since the dies are worn and damaged during manufacture of the stranded conductor 201, they need to be replaced periodically, resulting in a problem of high cost.

In addition, in order to make the twisted wire after compression into a substantially perfect circle, it is necessary to set the number of rotations of the manufacturing machine (twisting machine) to a certain value or less and to stabilize the number of rotations. There is also the problem that the production efficiency is worse than that of the stranded conductor 101 .

Therefore, the cross-sectional shape of the stranded conductor can be made closer to a perfect circle by compressing the strands without compression or by compressing the strands at a compression rate lower than that of the conventional technique 2. It is intended to provide

In order to solve the above problems, the present invention is
A plurality of outer thick wires are arranged with a space in the circumferential direction, and two first outer thin wires that are thinner than the outer thick wire are spaced apart between the outer thick wires adjacent to each other in the circumferential direction. , a stranded conductor in which an outermost layer is formed by arranging two second small-diameter wires thinner than the large-diameter wire between the first small-diameter wires,
An inner large-diameter wire is arranged inside a valley portion of two second outer small-diameter wires adjacent in the circumferential direction, and a plurality of the inner large-diameter wires are arranged in the circumferential direction so as to be spaced apart from each other in the circumferential direction. Two inner thin wires thinner than the inner thick wire are arranged in the circumferential direction between adjacent inner thick wires,
An inner layer is provided radially inside the stranded conductor in the inner thick wire and the inner thin wire,
The outer thick wire is composed of four or more,
The distance from the center of the stranded conductor to the outer edge of the outer thick wire is the same as the distance from the center of the stranded conductor to the outer edge of the second outer thin wire. It is something to do.

Further, the second outer thin wire may be formed thicker than the first outer thin wire.

Further, the second outer thin wire may be thinner than the first outer thin wire.

Further, the inner layer is composed of four or more first inner layer wires arranged in a circumferential direction,
The number of wires forming the outermost layer may be five times the number of the first inner layer wires.

The inner layer is composed of four or more first inner layer wires arranged in the circumferential direction and one center line arranged radially inside the stranded conductor in the first inner layer wire,
The number of wires forming the outermost layer may be five times the number of the first inner layer wires.

Further, the number of the outer thick-diameter wires, the number of the inner thick-diameter wires, and the number of the first inner layer wires are the same,
Further, the number of the first outer thin wires, the number of the second outer thin wires, and the number of the inner thin wires may each be twice the number of the first inner layer wires.

Further, the wires forming the outermost layer may be compressed and deformed from the outside.

According to the present invention, a plurality of outer large-diameter wires are spaced apart in the circumferential direction, and two first outer thin-diameter wires thinner than the outer thick-diameter wires are arranged between the outer large-diameter wires adjacent to each other in the circumferential direction. are spaced apart from each other, and two second small-diameter wires thinner than the large-diameter wire are arranged between the first small-diameter wires to form the outermost layer, and in the circumferential direction An inner thick wire is arranged inside the valley of two second thin outer wires adjacent to each other. Two inner thin wires thinner than the inner thick wire are arranged in the circumferential direction between the inner thick wires, and an inner layer is provided radially inside the stranded conductor of the inner thick wire and the inner thin wire. As a result, the cross-sectional shape of the stranded conductor can be made substantially circular, and the diameter and weight of the stranded conductor can be reduced, and the flexibility of the stranded conductor can be improved.

In addition, unlike the stranded conductor 201 of prior art 2, the stranded conductor of the present invention can be made to have a substantially perfect circular outer shape without passing the strands through a compression die. It is possible to maintain the physical properties of the wire without impairing the physical properties such as elongation, flexibility, flexibility, etc., and obtain highly reliable quality. It can be effectively used in various fields.

1 is a cross-sectional view of a stranded conductor according to Example 1 of the present invention; FIG. FIG. 4 is a cross-sectional view showing an example of a stranded conductor according to Example 3 of the present invention; FIG. 11 is a cross-sectional view showing another example of the stranded conductor according to Example 3 of the present invention; FIG. 5 is a cross-sectional view showing an example of a stranded conductor according to Example 4 of the present invention; FIG. 11 is a cross-sectional view showing an example of a stranded conductor according to Example 5 of the present invention; FIG. 2 is a cross-sectional view of a stranded conductor according to prior art 1; FIG. 10 is a cross-sectional view of a stranded conductor according to prior art 2;

A mode for carrying out the present invention will be described with reference to the drawings.

[Example 1]
FIG. 1 is a cross-sectional view of a stranded wire conductor 1 according to Example 1 of the present invention cut in a direction perpendicular to the axial direction. bottom.

The stranded conductor 1 consists of six types of elements: an outer thick wire 2, a first outer thin wire 3, a second outer thin wire 4, an inner thick wire 5, an inner thin wire 6, and a first inner layer wire 7. made up of lines. Each of the outer thick wire 2, the inner thick wire 5, and the first inner layer wire 7 is composed of four wires, and the first outer thin wire 3, the second outer thin wire 4, and the inner thin wire 6 are each composed of four wires. , which is twice the number of the first inner layer wires 7 .

Wire materials for the wires 2, 3, 4, 5, 6, 7 include bare copper wires, oxygen-free copper wires, linear crystal oxygen-free copper wires, single-crystal high-purity oxygen-free copper wires, and the like. A wire, a copper wire plated with tin, nickel, silver, etc., an aluminum wire, various alloy wires, and an insulated wire such as an enamel wire, a litz wire, a formal wire, etc. can be used. The materials of the wires 2, 3, 4, 5, 6 and 7 may be the same or different.

As shown in FIG. 1, the four outer large-diameter wires 2 are arranged so as to be spaced apart from each other in the circumferential direction around the center A of the stranded conductor 1 .

Two first small-diameter wires 3, 3 are arranged between adjacent large-diameter wires 2, 2 so as to be spaced apart from each other in the circumferential direction around the center A of the stranded conductor 1. ing. Two second outer thin wires 4 are arranged between two first outer thin wires 3, 3 that are closest to each other in the circumferential direction.

An outermost layer 11 is composed of four outer thick wires 2 , eight first outer thin wires 3 , and eight second outer thin wires 4 .

A single inner large diameter wire 5 is arranged inside a valley portion 15 formed between the second outer small diameter wires 4, 4 adjacent in the circumferential direction. Four of them are arranged so as to be spaced apart from each other. Between the inner large-diameter wires 5, 5 adjacent in the circumferential direction around the center A of the stranded conductor 1, two inner thin-diameter wires 6, 6 are arranged so as to contact each other in the circumferential direction. It is

The inner thin wire 6 constitutes the outermost layer 11 and is located inside the valley portion 16 formed between the outer thick wire 2 and the first outer thin wire 3 adjacent in the circumferential direction. They are arranged so as to contact the diameter wire 2 , the first outer small diameter wire 3 and the inner large diameter wire 5 .

A first outer layer 12 is formed by four inner large-diameter wires 5 and eight inner thin-diameter wires 6 , and the first outer layer 12 is formed inside the outermost layer 11 . An outer layer 13 is composed of the outermost layer 11 and the first outer layer 12 .

Four first inner layer wires 7 are arranged in the circumferential direction inside the stranded conductor 1 of the inner thick wire 5 and the inner thin wire 6 in the radial direction. constitutes The inner layer 14 is formed inside the first outer layer 12 . The first inner layer wire 7 is arranged so as to be in contact with the inner large-diameter wire 5 and the inner small-diameter wire 6 adjacent to each other.

The diameter d6 of the first inner layer wire 7 is set larger than the diameter d4 of the inner thick wire 5, and the diameter d4 of the inner thick wire 5 is set thicker than the diameter d1 of the outer thick wire 2. 2 is set larger than the diameter d5 of the inner thin wire 6, the diameter d5 of the inner thin wire 6 is set thicker than the diameter d3 of the second outer thin wire 4, and the second The diameter d3 of the outer thin wire 4 is set larger than the diameter d2 of the first outer thin wire 3 .

In the first embodiment, the relationships d1=0.74×d6, d2=0.62×d6, d3=0.66×d6, d4=0.98×d6, and d5=0.67×d6 are established. Each strand 2, 3, 4, 5, 6, 7 was used.

In addition, the cross-sectional shape of the stranded conductor 1 is a substantially perfect circle, that is, the distance L1 from the center A of the stranded conductor 1 to the outermost edge B of the outer large-diameter wire 2 and the distance L1 from the center A of the stranded conductor 1 The distance L2 to the outermost edge C of the second outer thin wire 4 is formed to be the same.

Since the stranded conductor 1 of the present invention has the structure described above, it has the following functions and effects.

The outer shape of the stranded conductor 1 is made substantially circular without being compressed, and the wires 2, 3, 4, 5, 6, 7 are aligned with substantially all of the adjacent wires 2, 3, 4, 5. , 6, 7 can be contacted.

Since the outer shape of the stranded conductor 1 is substantially circular and, as described above, the diameter can be made smaller than that of the stranded conductor 101 of the prior art 1, the thickness of the insulating material coating can be reduced and the thickness can be substantially uniform. Since the insulating material can be reduced, the cost can be reduced.

In addition, unlike the stranded conductor 201 of the prior art 2, the stranded conductor 1 can be made to have a substantially perfect circular outer shape without passing the strands through a compression die. It is possible to maintain the physical properties of the wire without impairing the physical properties such as flexibility and flexibility, so that highly reliable quality can be obtained. etc. can be effectively utilized.

[Example 2]
The strands constituting the stranded conductor 1 of Example 1 are arranged such that the diameter d4 of the inner thick wire 5 is larger than the diameter d1 of the outer thick wire 2, and the diameter d1 of the outer thick wire 2 is smaller than the inner small diameter. The diameter d5 of the inner thin wire 6 is thicker than the diameter d5 of the wire 6, the diameter d5 of the inner thin wire 6 is thicker than the diameter d3 of the second outer thin wire 4, and the diameter d3 of the second outer thin wire 4 is the first outer diameter. If each element wire 2, 3, 4, 5, 6, 7 and the stranded conductor 1 are constructed using a wire larger than the diameter d2 of the thin wire 3, the element having the diameter described in the first embodiment can be obtained. The stranded conductor 1 can be configured using arbitrary strands other than wires. Alternatively, the outermost layer 11, which is the outermost layer in the stranded conductor 1, may be compressed from the outside with a compression die or the like.

Due to this compression, the outer peripheral portions of the outer large-diameter wire 2, the first outer thin-diameter wire 3, and the second outer thin-diameter wire 4, which constitute the outermost layer 11, are compressed and deformed, and the outer shape of the stranded conductor becomes more circular. shape can be approximated. Compression using a compression die or the like may be performed when the stranded conductor 1 is manufactured, or may be performed after the stranded conductor 1 is manufactured. Note that the compression rate is set arbitrarily.

Since the rest of the structure is the same as that of the first embodiment, description thereof will be omitted.

Also in this second embodiment, the same effects as those of the above-described first embodiment can be exhibited.

[Example 3]
In Embodiments 1 and 2, the outer thick wire 2, the inner thick wire 5, and the first inner layer wire 7 are each composed of four wires, and the first outer thin wire 3 and the second outer thin wire 4 are used. and the inner thin wire 6 are composed of eight wires, which is twice the number of the first inner layer wire 7, but the number of the outer thick wire 2, the inner thick wire 5, and the first inner layer wire 7 is the same. , the numbers of the first outer thin wire 3, the second outer thin wire 4, and the inner thin wire 6 may each be twice the number of the first inner layer wires 7, and the number of the first inner layer wires 7 is four or more, each can be set to any number.

In addition, one center line 20 is provided radially inside the stranded conductor 1 in the plurality of first inner layer wires 7 arranged in the circumferential direction, and the inner layer 24 is formed by the first inner layer wire 7 and the center line 20. may be configured.

The outer thick wire 2, the first outer thin wire 3, the second outer thin wire 4, the inner thick wire 5, the inner thin wire 6, and the first inner layer wire 7 are the same as those in the first and second embodiments. Arranged with regularity.

For example, as shown in FIG. 2, the outer thick wire 2, the inner thick wire 5, and the first inner layer wire 7 are each five, and the first outer thin wire 3, the second outer thin wire 4, and the inner thin wire are arranged. Each of the radial wires 6 is ten, which is twice the number of the first inner layer wires 7, and one center line 20 is provided radially inside the stranded conductor 1 in the five first inner layer wires 7. In the case of the stranded conductor 21, the diameter of the center line 20 is d7, d1 = 0.575 x d6, d2 = 0.51 x d6, d3 = 0.515 x d6, d4 = 0.83 x d6 , d5 = 0.545 x d6, d7 = 0.70 x d6. With a low compressibility, the cross-sectional shape of the stranded conductor 21 can be made substantially circular.

For example, as shown in FIG. The number of radial wires 6 is 12, which is twice the number of the first inner layer wires 7, and one center line 20 is provided radially inside the stranded conductor 1 in the six first inner layer wires 7. In the case of the stranded conductor 22, the diameter of the center line 20 is d7, and d1 = 0.50 x d6, d2 = 0.425 x d6, d3 = 0.45 x d6, d4 = 0.765 x d6. , d5 = 0.50 × d6, d7 = d6 by using the wire material that is the base of each of the wires 2, 3, 4, 5, 6, 7, 20, with no or low compression rate , the cross-sectional shape of the stranded conductor 22 can be made substantially circular.

Since other structures are the same as those of the first and second embodiments, description thereof is omitted.

Also in the third embodiment, it is possible to exhibit the same effects as in the first and second embodiments.

[Example 4]
In Examples 1 to 3, the diameter d3 of the second small-diameter wire 4 is made larger than the diameter d2 of the first small-diameter wire 3. The diameter may be formed larger than the diameter d3 of the second thin outer wire 4 .

For example, as shown in FIG. 4, the outer thick wire 2, the inner thick wire 5, and the first inner layer wire 7 are each four, and the first outer thin wire 3, the second outer thin wire 4, and the inner thin wire are provided. In the case of the stranded conductor 26 with eight radial wires 6, which is twice the number of the first inner layer wires 7, d1=0.74×d6, d2=0.69×d6, d3= By using a wire rod that is the base of each wire 2, 3, 4, 5, 6, 7 that satisfies the relationship of 0.595 x d6, d4 = 1.01 x d6, d5 = 0.63 x d6, The cross-sectional shape of the stranded wire conductor 26 can be made into a substantially perfect circular shape without compression or with a low compression ratio.

Since other structures are the same as those of the first to third embodiments, description thereof is omitted.

Also in the present embodiment 4, it is possible to exhibit the same effects as those of the above-described embodiments 1 to 3.

[Example 5]
In Examples 1 to 4, the inner layers 14 and 24 are composed of the first inner layer wire 7 or the first inner layer wire 7 and the center line 20, but instead of the center line 20, multiple It is also possible to arrange strands of wire, carbon fibers, or the like.

For example, as shown in FIG. 5, six first inner layer wires 7 are arranged in the circumferential direction to form a first inner layer 31, and inside the first inner layer 31, six second inner layer wires 32 are arranged. The stranded conductor 41 may be arranged in the circumferential direction to form the second inner layer 33 , and the center line 34 may be arranged inside the second inner layer 33 to form the inner layer 40 .

Since other structures are the same as those of the first to fourth embodiments, description thereof is omitted.

Also in the present Example 5, it is possible to exhibit the same effects as those of Examples 1 to 4 described above.

1, 21, 22, 26, 41 stranded conductor 2 outer thick wire
3 First outer thin wire
4 Second outer thin wire
5 Inner diameter wire
6 inner thin wire
7 first inner layer line 11 outermost layer 14, 24 inner layer 20 center line

Claims (7)

A plurality of outer thick wires are arranged with a space in the circumferential direction, and two first outer thin wires that are thinner than the outer thick wire are spaced apart between the outer thick wires adjacent to each other in the circumferential direction. , a stranded conductor in which an outermost layer is formed by arranging two second small-diameter wires thinner than the large-diameter wire between the first small-diameter wires,
An inner large-diameter wire is arranged inside a valley portion of two second outer small-diameter wires adjacent in the circumferential direction, and a plurality of the inner large-diameter wires are arranged in the circumferential direction so as to be spaced apart from each other in the circumferential direction. Two inner thin wires thinner than the inner thick wire are arranged in the circumferential direction between adjacent inner thick wires,
An inner layer is provided radially inside the stranded conductor in the inner thick wire and the inner thin wire,
The outer thick wire is composed of four or more,
The distance from the center of the stranded conductor to the outer edge of the outer thick wire is the same as the distance from the center of the stranded conductor to the outer edge of the second outer thin wire. stranded conductor. 2. The stranded conductor according to claim 1, wherein said second thin outer wire is formed thicker than said first thin outer wire. 2. The stranded conductor according to claim 1, wherein said second thin outer wire is thinner than said first thin outer wire. The inner layer is composed of four or more first inner layer wires arranged in the circumferential direction,
2. The stranded conductor according to claim 1, wherein the number of strands constituting said outermost layer is five times the number of said first inner layer wires. The inner layer is composed of four or more first inner layer wires arranged in the circumferential direction and one center line arranged radially inside the stranded conductor in the first inner layer wire,
2. The stranded conductor according to claim 1, wherein the number of strands constituting said outermost layer is five times the number of said first inner layer wires. The number of the outer thick-diameter wires, the number of the inner thick-diameter wires, and the number of the first inner layer wires are the same,
The number of the first outer thin wires, the number of the second outer thin wires, and the number of the inner thin wires are each double the number of the first inner layer wires. The stranded conductor according to claim 4 or 5. The stranded conductor according to any one of claims 1 to 5, wherein the strands forming the outermost layer are compressed and deformed from the outside.

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