JP7265814B1 - 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 first large-diameter wires (2) are spaced apart in the circumferential direction, and a first small-diameter wire (4) is spaced between the first large-diameter wires (2, 2) adjacent to each other in the circumferential direction. Between the first small diameter wires 4, 4, two second large diameter wires 3 are provided spaced apart, and between the second large diameter wires 3, 3, a second small diameter wire One wire 5 or two wires 5 are provided in the circumferential direction, the inner thick wire 6 is disposed radially inside the second outer thin wire 5, and the inner thick wire 6, 6 adjacent in the circumferential direction , two inner small-diameter wires 7, 7 are arranged in the circumferential direction, and the inner small-diameter wire 7 is disposed in the valley between the first outer large-diameter wire 2 and the first outer small-diameter wire 4 adjacent in the circumferential direction. 16 inside. [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 core, 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. 11 , has a shape similar to a hexagon, and does not have a shape similar to a round shape. Hereinafter, this is referred to as prior art 1.

In general, as shown in FIG. 11, 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, when a stranded conductor is formed 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. 12, a method has been proposed in which the cross-sectional shape of the stranded conductor 201 is made substantially circular. Hereinafter, this technique will be 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-mentioned problems, the present invention provides a plurality of first large diameter wires spaced apart in the circumferential direction, and between the first large diameter wires adjacent to each other in the circumferential direction, the first large diameter wire Two first thin outer wires thinner than the diameter wire are spaced apart, and two second thick outer wires thicker than the first thin outer wires are spaced between the first thin outer wires. and between the second large-diameter wires, one or two second small-diameter wires thinner than the second large-diameter wires are provided in the circumferential direction to constitute the outermost layer, ,
An inner thick wire is disposed inside the stranded conductor in the radial direction of the second thin outer wire, and a plurality of inner thick wires are disposed circumferentially spaced apart from each other, and adjacent inner wires are arranged in the circumferential direction. Two inner thin wires thinner than the inner thick wire are arranged in the circumferential direction between the thick wires,
The inner thin wire is provided inside a valley portion between the first outer thick wire and the first outer thin wire that are circumferentially adjacent to each other,
An inner layer is provided radially inside the stranded conductor in the inner thick wire and the inner thin wire,
The distance from the center of the stranded conductor to the outer edge of the first outer large diameter 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 characterized.

Further, the inner layer may be composed of three or more first inner layer wires arranged in the circumferential direction.

Further, the inner layer may be composed of three or more first inner layer wires arranged in the circumferential direction and one center line radially inside the stranded conductor in the first inner layer wire.

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

Further, the number of the first outer thick wires, the number of the inner thick wires, and the number of the first inner layer wires are the same, and the number of the first outer thin wires and the second outer thick wire are the same. The number of 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 first outer large-diameter wires are spaced apart in the circumferential direction, and two first outer thin-diameter wires are spaced apart between adjacent first outer large-diameter wires in the circumferential direction. between the first thin outer wires, two second thick outer wires are spaced apart, and one second thin outer wire is provided between the second thick outer wires The outermost layer is formed by providing two wires in the direction, and the inner thick wire is disposed radially inside the stranded conductor in the second outer thin wire, and a plurality of the inner thick wires are spaced apart in the circumferential direction. and two inner thin wires are disposed in the circumferential direction between the inner thick wires adjacent in the circumferential direction, and the inner thin wires are divided into the first outer thick wire and the second circumferentially adjacent inner thick wire. 1. Arranged inside the valley between the outer thin wires, and provided an inner layer radially inside the stranded conductor of the inner thick wire and the inner thin wire, the cross-sectional shape of the stranded conductor is almost a perfect circle. It is possible to reduce the diameter, reduce the weight, and improve the flexibility of the stranded conductor.

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. 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; The cross-sectional view which shows the other example of the stranded conductor which concerns on Example 4 of this invention. The cross-sectional view which shows the other example of the stranded conductor which concerns on Example 4 of this invention. The cross-sectional view which shows the other example of the stranded conductor which concerns on Example 4 of this invention. FIG. 11 is a cross-sectional view showing an example of a stranded conductor according to Example 5 of the present invention; The cross-sectional view which shows an example of the stranded wire conductor which concerns on Example 6 of this 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 of 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 includes a first outer thick wire 2, a second outer thick wire 3, a first outer thin wire 4, a second outer thin wire 5, an inner thick wire 6, an inner thin wire 7, The first inner layer wire 8 is composed of seven types of wires. The first outer thick wire 2, the second outer thin wire 5, the inner thick wire 6, and the first inner layer wire 8 are each composed of three wires, and the second outer thick wire 3 and the first outer thin wire 4 and the inner fine-diameter wire 7 are each composed of six wires, which is twice the number of the first inner layer wires 8 .

Wire materials that are the basis of the wires 2, 3, 4, 5, 6, 7, 8 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. copper wire, this copper wire plated with tin, nickel, silver, etc., aluminum wire, various alloy wires, enameled wire, litz wire, formal wire, etc. can. The materials of the wires 2, 3, 4, 5, 6, 7 and 8 may be the same or different.

As shown in FIG. 1, the three first 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 .

In the circumferential direction around the center A of the stranded conductor 1, two first small-diameter wires 4, 4 are arranged between adjacent first large-diameter wires 2, 2 so as to be spaced apart from each other. is set. Two second large-diameter wires 3, 3 are arranged so as to be spaced apart from each other between the two first small-diameter wires 4, 4 that are closest to each other in the circumferential direction. One second outer thin wire 5 is arranged between two second outer thick wires 3, 3 that are most adjacent in the circumferential direction.

A total of 18 wires including three first large diameter wires 2, six second large diameter wires 3, six first small diameter wires 4, and three second small diameter wires 5. constitutes the outermost layer 11.

A single inner large-diameter wire 6 is arranged radially inward of the second outer small-diameter wire 5 centering on the center A of the stranded conductor 1, and the inner large-diameter wires 6 are arranged circumferentially with each other. Three are arranged so as to be separated from each other. Between the inner large diameter wires 6, 6 adjacent in the circumferential direction around the center A of the stranded conductor 1, two inner thin wires 7, 7 are arranged so as to contact each other in the circumferential direction. It is

The inner small-diameter wire 7 constitutes the outermost layer 11 and is located inside the valley portion 16 formed between the first outer large-diameter wire 2 and the first outer small-diameter wire 4 that are adjacent in the circumferential direction. They are arranged so as to contact the adjacent first outer large diameter wire 2 , first outer small diameter wire 4 and inner large diameter wire 6 .

Three inner large diameter wires 6 and six inner thin wires 7 constitute a first outer layer 12 , 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 .

Three first inner layer wires 8 are arranged in the circumferential direction radially inside the stranded conductor 1 of the inner thick wire 6 and the inner thin wire 7 . constitutes The inner layer 14 is formed inside the first outer layer 12 . The first inner layer wire 8 is arranged so as to be in contact with the inner large-diameter wire 6 and the inner small-diameter wire 7 adjacent to each other.

The diameter d5 of the inner thick-diameter wire 6 is set larger than the diameter d7 of the first inner layer wire 8, and the diameter d7 of the first inner layer wire 8 is set thicker than the diameter d1 of the first outer thick-diameter wire 2. The diameter d1 of the outer thick wire 2 is set larger than the diameter d6 of the inner thin wire 7, and the diameter d6 of the inner thin wire 7 is set thicker than the diameter d2 of the second outer thick wire 3. The diameter d3 of the diameter d2 of the second outer large-diameter wire 3 is set larger than the diameter d3 of the first outer thin-diameter wire 4, and the diameter d3 of the first outer thin-diameter wire 4 is set to the second It is set thicker than the diameter d4 of the outer thin wire 5 .

In the first embodiment, d1=0.84*d7, d2=0.82*d7, d3=0.69*d7, d4=0.67*d7, d5=1.195*d7, d6=0. Wires 2, 3, 4, 5, 6, 7, and 8 satisfying the relationship of 825×d7 were used.

In addition, the cross-sectional shape of the stranded conductor 1 is substantially a perfect circle. to the outermost edge C of the second outer thin wire 5 is substantially 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 strands 2, 3, 4, 5, 6, 7, 8 are aligned with substantially all adjacent strands 2, 3, 4. , 5, 6, 7, 8.

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 diameter d1 of the first outer thick wire 2 is smaller than the diameter d3 of the first outer thin wire 4 and the diameter d4 of the second outer thin wire 5. The diameter d2 of the second outer thick wire 3 is thicker than the diameter d3 of the first outer thin wire 4 and the diameter d4 of the second outer thin wire 5, and the diameter d5 of the inner thick wire 6 is thicker than the inner If each element wire 2, 3, 4, 5, 6, 7, 8 and the stranded conductor 1 are configured using a wire larger than the diameter d6 of the small diameter wire 7, the diameter described in the first embodiment can be obtained. The stranded conductor 1 can be configured by using arbitrary strands other than the strands that have. 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.

By this compression, the outer peripheral portions of the first outer large-diameter wire 2, the second outer large-diameter wire 3, the first outer thin-diameter wire 4, and the second outer thin-diameter wire 5 that constitute the outermost layer 11 are compressed and deformed. The outer shape of the stranded conductor can be brought closer to a perfect circle. 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 first outer large diameter wire 2, the second outer small diameter wire 5, the inner large diameter wire 6, and the first inner layer wire 8 are each composed of three wires, and the second outer large diameter wire The wire 3, the first outer thin wire 4, and the inner thin wire 7 are each composed of six wires, which is twice the number of the first inner layer wires 8, but the first outer thick wire 2 and the second outer wire The numbers of the thin wire 5, the inner thick wire 6 and the first inner layer wire 8 are the same, and the numbers of the second outer thick wire 3, the first outer thin wire 4 and the inner thin wire 7 are set to If the number of the first inner layer wires 8 is twice the number of the first inner layer wires 8, the number of the first inner layer wires 8 can be set to an arbitrary number as long as the number of the first inner layer wires 8 is three or more.

In addition, one center line 20 is provided radially inside the stranded conductor of the plurality of first inner layer wires 8 arranged in the circumferential direction, and the first inner layer wire 8 and the center line 20 form an inner layer 24. You may

The first outer thick wire 2, the second outer thick wire 3, the first outer thin wire 4, the second outer thin wire 5, the inner thick wire 6, the inner thin wire 7, and the first inner layer wire 8 are , are arranged with the same regularity as in the first and second embodiments.

For example, as shown in FIG. In the case of the stranded conductor 21 in which each of the first outer thin wire 4 and the inner thin wire 7 is eight, which is twice the number of the first inner layer wires 8, d1=0.605×d7, d2=0.59×d7, d3=0.485×d7, d4=0.47×d7, d5=0.98×d7, d6=0.67×d7. , 4, 5, 6, 7, and 8, the cross-sectional shape of the stranded conductor 21 can be made substantially circular without compression or with a low compressibility.

For example, as shown in FIG. Ten first outer thin wires 4 and ten inner thin wires 7, which is twice the number of first inner layer wires 8, are arranged radially inside the stranded conductors of the five first inner layer wires 8. , in the case of the stranded conductor 22 provided with one centerline 20, the diameter of the centerline 20 is d8, d1=0.48*d7, d2=0.48*d7, d3=0.39* Wires 2, 3, 4, 5, 6 satisfying the relationship d7, d4=0.37×d7, d5=0.83×d7, d6=0.545×d7, d8=0.70×d7 , 7, 8, and 20, the cross-sectional shape of the stranded conductor 22 can be made substantially circular without compression or with a low compressibility.

For example, as shown in FIG. Twelve first outer thin wires 4 and inner thin wires 7, which is twice the number of first inner layer wires 8, are arranged radially inside the stranded conductors of the six first inner layer wires 8. , in the case of the stranded conductor 23 provided with one central line 20, the diameter of the central line 20 is d8, d1=0.42×d7, d2=0.42×d7, d3=0.335× d7, d4=0.33×d7, d5=0.765×d7, d6=0.50×d7, d8=d7 Each strand 2, 3, 4, 5, 6, 7, 8 , 20, the cross-sectional shape of the stranded conductor 23 can be made substantially circular without compression or with a low compressibility.

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 above, one second thin outer wire 5 constitutes the outermost layer 11 and is interposed between two second thick outer wires 3, 3 that are most adjacent in the circumferential direction. However, two second thin outer wires 5, 5 may be disposed between the two second thick outer wires 3, 3 in the circumferential direction.

As shown in FIGS. 5 to 8, the inner side of the valley portion 17 that constitutes the outermost layer 11 and is formed between the two second outer thin wires 5, 5 that are closest to each other in the circumferential direction. , one inner thick wire 6 is arranged. That is, one inner large-diameter wire 6 is arranged inside the second outer small-diameter wire 5 in the radial direction centering on the center A of the stranded conductor.

In addition, the inner thin wire 7 is provided inside the valley portion 16 formed between the first outer thick wire 2 and the first outer thin wire 4 which constitute the outermost layer 11 and which are adjacent in the circumferential direction. is arranged.

The diameter d1 of the first outer large-diameter wire 2 is larger than the diameter d3 of the first outer thin-diameter wire 4 and the diameter d4 of the second outer thin-diameter wire 5, and the diameter d2 of the second outer thick-diameter wire 3 is larger than the first diameter d3 of the outer thin wire 4 and diameter d4 of the second thin outer wire 5, the diameter d4 of the second thin outer wire 5 is thicker than the diameter d3 of the first thin outer wire 4, and the inner diameter Each element wire 2, 3, 4, 5, 6, 7, 8, 20 can be configured by using a diameter wire 6 whose diameter d5 is larger than the diameter d6 of the inner thin wire 7. FIG.

For example, as shown in FIG. 5, three each of the first outer thick wire 2, the inner thick wire 6 and the first inner layer wire 8, the second outer thick wire 3 and the first outer thin wire 4 are provided. In the case of the stranded conductor 31 in which each of the second thin outer wire 5 and the thin inner wire 7 is six, which is twice the number of the first inner layer wires 8, d1=0.72×d7, d2=0.72×d7, d3=0.55×d7, d4=0.57×d7, d5=1.195×d7, d6=0.825×d7. , 4, 5, 6, 7, and 8, the cross-sectional shape of the stranded conductor 31 can be made substantially circular without compression or with a low compressibility.

For example, as shown in FIG. 6, there are four first outer thick wires 2, four inner thick wires 6, and first inner layer wires 8, and four second outer thick wires 3 and first outer thin wires 4. In the case of the stranded conductor 32 in which each of the second thin outer wires 5 and the inner thin wires 7 is eight, which is twice the number of the first inner layer wires 8, d1=0.535×d7, d2=0.535×d7, d3=0.38×d7, d4=0.42×d7, d5=0.98×d7, d6=0.67×d7. , 4, 5, 6, 7, and 8, the cross-sectional shape of the stranded conductor 32 can be made substantially circular without compression or with a low compressibility.

For example, as shown in FIG. 7, five first outer large diameter wires 2, five inner large diameter wires 6, and first inner layer wires 8, and a second outer large diameter wire 3 and a first outer thin wire 4 are provided. Ten second outer thin wires 5 and ten inner thin wires 7, which is twice the number of the first inner layer wires 8, are arranged radially inside the stranded conductors of the five first inner layer wires 8. , in the case of the stranded conductor 33 provided with one center line 20, the diameter of the center line 20 is d8, d1=0.42*d7, d2=0.425*d7, d3=0.30* d7, d4=0.33×d7, d5=0.83×d7, d6=0.545×d7, and d8=0.70×d7 for each wire 2, 3, 4, 5, 6 , 7, 8, and 20, the cross-sectional shape of the stranded conductor 33 can be made substantially circular without compression or with a low compressibility.

For example, as shown in FIG. Twelve second outer thin wires 5 and inner thin wires 7, which are twice the number of the first inner layer wires 8, are arranged radially inside the stranded conductors of the six first inner layer wires 8. , in the case of a stranded conductor 34 having one central line 20, the diameter of the central line 20 is d8, d1=0.36*d7, d2=0.34*d7, d3=0.27* d7, d4 = 0.275 x d7, d5 = 0.765 x d7, d6 = 0.50 x d7, d8 = each strand 2, 3, 4, 5, 6, 7, 8 satisfying the relationship , 20, the cross-sectional shape of the stranded conductor 34 can be made substantially circular without compression or with a low compressibility.

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 the fourth embodiment, the diameter d4 of the second thin outer wire 5 is larger than the diameter d3 of the first thin outer wire 4, but the diameter d3 of the first thin outer wire 4 is It may be formed thicker than the diameter d4 of the thin wire 5 .

For example, as shown in FIG. 9, there are four first outer thick wires 2, four inner thick wires 6, and four first inner layer wires 8, and four second outer thick wires 3 and first outer thin wires 4. In the case of the stranded conductor 36 in which the number of the second thin outer wire 5 and the thin inner wire 7 is eight, which is twice the number of the first inner layer wires 8, d1=0.545×d7, d2=0.55×d7, d3=0.395×d7, d4=0.37×d7, d5=1.01×d7, d6=0.63×d7. , 4, 5, 6, 7, and 8, the cross-sectional shape of the stranded conductor 36 can be made substantially circular without compression or with a low compressibility.

Since the rest of the structure is the same as that of the fourth embodiment, description thereof is omitted.

Also in the present Example 5, the effect similar to the said Example 4 can be exhibited.

[Example 6]
In Examples 1 to 5, the inner layers 14 and 24 are composed of the first inner layer wire 8, or the first inner layer wire 8 and the center line 20, but instead of the center line 20, a plurality of It is also possible to arrange strands of wire, carbon fibers, or the like.

For example, as shown in FIG. 10, six first outer large-diameter wires 2, second outer small-diameter wires 5, inner large-diameter wires 6, and first inner layer wires 8 are provided, and the second outer large-diameter wires 3 and Twelve first outer thin wires 4 and inner thin wires 7, which are twice the number of first inner layer wires 8, are used, and two second outer thick wires 3, 3, one second outer small-diameter wire 5 is arranged to form an outer layer 13 similar to the outer layer 13 of the stranded conductor 23 shown in FIG. Circumferentially arranged to form a first inner layer 41, inside the first inner layer 41, six second inner layer wires 42 are arranged in a circumferential direction to form a second inner layer 43, and The stranded conductor 51 may be formed by arranging the center line 44 inside the 43 and forming the inner layer 50 .

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

Also in this sixth embodiment, the same effect as in the first to fifth embodiments can be exhibited.

1, 21, 22, 23, 31, 32, 33, 34, 36, 51 Twisted wire conductor 2 First outer thick wire
3 Second outer diameter wire
4 First outer thin wire
5 Second outer thin wire
6 Inner diameter wire
7 inner thin wire
8 first inner layer line 11 outermost layer 14, 24, 50 inner layer 20, 44 center line

Claims (6)

A plurality of first outer thick wires are provided circumferentially spaced apart, and two first outer thin wires thinner than the first outer thick wires are provided between the first outer thick wires adjacent to each other in the circumferential direction. are spaced apart from each other, and two second large diameter wires thicker than the first small diameter wire are provided separately between the first small diameter wires, and between the second large diameter wires, A stranded conductor in which an outermost layer is configured by providing one or two second outer thin wires thinner than the second outer thick wire in a circumferential direction,
An inner thick wire is disposed inside the stranded conductor in the radial direction of the second thin outer wire, and a plurality of inner thick wires are disposed circumferentially spaced apart from each other, and adjacent inner wires are arranged in the circumferential direction. Two inner thin wires thinner than the inner thick wire are arranged in the circumferential direction between the thick wires,
The inner thin wire is provided inside a valley portion between the first outer thick wire and the first outer thin wire that are circumferentially adjacent to each other,
An inner layer is provided radially inside the stranded conductor in the inner thick wire and the inner thin wire,
The distance from the center of the stranded conductor to the outer edge of the first outer large diameter wire is the same as the distance from the center of the stranded conductor to the outer edge of the second outer thin wire. A stranded conductor characterized by: 2. The stranded conductor according to claim 1, wherein the inner layer is composed of three or more first inner layer wires arranged in the circumferential direction. 2. The inner layer is composed of three or more first inner layer wires arranged in the circumferential direction and one center line radially inside the stranded conductor in the first inner layer wire. Stranded conductor as described. The number of the first outer thick-diameter wires, the number of the second outer thin-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 thick 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 2 or 3. The number of the first 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 thick wires, the number of the second outer thin wires, and the number of the inner thin wires are each equal to the number of the first inner layer wires. 4. The stranded conductor according to claim 2, wherein the number of wires is doubled. The stranded conductor according to any one of claims 1 to 3, wherein the strands forming the outermost layer are compressed and deformed from the outside.

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