JP2020187930A - Twisted wire conductor - Google Patents

Abstract

To provide a twisted wire conductor capable of manufacturing the cross sectional shape of the twisted wire conductor into a shape close to a perfect circle without compressing or at a low compression rate.SOLUTION: A twisted wire conductor includes a central layer 11 arranged and formed around three innermost layer wires 2 and an outer layer 15 consisting of a plurality of layers on the outer side of the central layer 11. Layers 12 and 13 in the outer layer 15 separately arrange three large diameter wires 3 (5) in the circumferential direction; and an even number of small diameter wires 4 (6) having an outer diameter smaller than that of the large diameter wire 3 (5) are arranged between the large diameter wires 3 and 3 (5 and 5) arranged at the nearest position in the circumferential direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a stranded conductor.

Conventionally, each of the strands constituting the stranded conductor used for electric wires and the like is generally a round wire having a circular cross section and the same diameter. Copper wire is mainly used as this wire, and tin, nickel, silver, aluminum, and various alloys are plated on the copper wire.

Generally, as shown in FIG. 4, three strands 101 are arranged in the central portion to form a central layer 102, and nine strands 103 are arranged in the circumferential direction on the outside of the central layer 102. The first inner layer 104 is provided by arranging the first inner layer 104, and 15 strands 105 are arranged in the circumferential direction on the outside of the first inner layer 104 and arranged in a concentric twisted arrangement in which the outer layer 106 is provided. A stranded conductor 110 formed by twisting in a direction is known, and the strands 101, 103, and 105 constituting the stranded conductor 110 are all made of strands having the same diameter.

Further, as shown in FIG. 5, it has the same central layer 102, the first inner layer 104, and the outer layer 106 as the stranded conductor 110, and has the same diameter as the strands 101, 103, 105 on the outside of the outer layer 106. A twisted wire conductor 201 formed by arranging 21 strands of a diameter 111 in a concentric twisted array provided with an outermost layer 112 and twisting them in the same direction is known. Hereinafter, the stranded conductors 110 and 201 will be referred to as the prior art 1.

Since all the strands 101, 103, 105, 111 constituting the stranded conductors 110, 201 have a circular cross section and have the same diameter, the strands 101, 103, 105 are formed. As shown in FIGS. 4 and 5, the outer peripheral shapes of the stranded conductors 110 and 201 made of, 111 are similar to a hexagonal shape, not a round shape.

Generally, the stranded conductors 110 and 201 are used as an electric wire or the like (covered wire) after the outer peripheral portion is coated with an insulating material. It is desired that the cross-sectional shape of the covered wire is a substantially perfect circular shape. On the other hand, it is desirable that the insulating material is substantially uniformly coated on the outer peripheral portion of the stranded conductor from the viewpoint of pressure resistance. Further, from the viewpoint of effective use of resources and weight reduction of the covered wire, it is desired that the cross-sectional shape of the stranded conductor is a perfect circle.

As described in Patent Document 1, a method has been proposed in which a wire having a circular cross section and all having the same diameter is twisted in one direction and passed through a compression die to make the cross-sectional shape of the stranded conductor substantially a perfect circle. ing. Hereinafter, this stranded conductor will be referred to as the prior art 2.

Japanese Unexamined Patent Publication No. 11-25758

In the stranded conductor of the above-mentioned prior art 2, when the wire is passed through the compression die, the outer layer wire 202 is compressed and deformed from the outside, so that the physical properties such as stretchability, flexibility, and flexibility are impaired. There is a problem.

Therefore, an object of the present invention is to provide a stranded conductor capable of producing a stranded conductor having a cross-sectional shape close to a perfect circle without compression or with a compression rate lower than that of the prior art 2. To do.

In order to solve the above-mentioned problems, the invention according to claim 1 has a central layer formed by arranging three innermost layer lines at the center, and an outer layer composed of a plurality of layers is provided outside the central layer. Provide,
In each layer in the outer layer, three large diameter wires are arranged apart from each other in the circumferential direction, and between the large diameter wires arranged at the positions closest to each other in the circumferential direction, from the outer diameter of the large diameter wire. It is characterized in that an even number of small diameter wires are arranged.

The invention according to claim 2 is the invention according to claim 1, wherein the outer layer is composed of a first outer layer provided outside the central layer and a second outer layer provided outside the first outer layer.
The first outer layer is arranged with three first thick diameter wires separated in the circumferential direction, and the first thick diameter wire is arranged between the first thick diameter wires arranged at the positions closest to each other in the circumferential direction. Two first small diameter wires smaller than the outer diameter of
The second outer layer is arranged with three second thick diameter wires separated in the circumferential direction, and the second thick diameter wire is arranged between the second thick diameter wires arranged at the closest positions in the circumferential direction. It is characterized in that it is configured by arranging four second small diameter wires smaller than the outer diameter of.

In the invention according to claim 3, in the invention according to claim 2, the outer diameter of the second thick wire is smaller than the outer diameter of the first thick wire, and the outer diameter of the second thin wire is the first. 2 Smaller than the outer diameter of the thick wire, the outer diameter of the first small diameter wire is smaller than the outer diameter of the second small diameter wire, and the outer diameter of the second thick wire and the outer diameter of the innermost layer wire are the same. It is characterized by being.

The invention according to claim 4 is the invention according to claim 1, wherein the outer layer includes a first outer layer provided outside the central layer, a second outer layer provided outside the first outer layer, and the second outer layer. It is composed of a third outer layer provided on the outside of the outer layer.
The first outer layer is arranged with three first thick diameter wires separated in the circumferential direction, and the first thick diameter wire is arranged between the first thick diameter wires arranged at the positions closest to each other in the circumferential direction. Two first small diameter wires smaller than the outer diameter of
The second outer layer is arranged with three second thick diameter wires separated in the circumferential direction, and the second thick diameter wire is arranged between the second thick diameter wires arranged at the closest positions in the circumferential direction. 4 second small diameter wires smaller than the outer diameter of
The third outer layer is arranged with three third thick diameter wires separated in the circumferential direction, and the third thick diameter wire is arranged between the third thick diameter wires arranged at the closest positions in the circumferential direction. It is characterized in that it is configured by arranging six third small diameter wires smaller than the outer diameter of.

In the invention according to claim 5, in the invention according to claim 4, the outer diameter of the second thick wire is smaller than the outer diameter of the first thick wire, and the outer diameter of the third thin wire is the second. The outer diameter of the second small diameter wire is smaller than the outer diameter of the large diameter wire, the outer diameter of the second small diameter wire is smaller than the outer diameter of the third small diameter wire, and the outer diameter of the first small diameter wire is the outer diameter of the second small diameter wire. Smaller,
The outer diameter of the second thick wire, the outer diameter of the third thick wire, and the outer diameter of the innermost layer wire are the same.

In the invention according to claim 6, in the invention according to claim 4, the outer diameter of the second thick wire is smaller than the outer diameter of the first thick wire, and the outer diameter of the third thin wire is the first. 2 Smaller than the outer diameter of the thick wire, and the outer diameter of the first small diameter wire is smaller than the outer diameter of the third small diameter wire.
The outer diameter of the second small diameter wire is the same as the outer diameter of the third small diameter wire.
The outer diameter of the second thick wire, the outer diameter of the third thick wire, and the outer diameter of the innermost layer wire are the same.

The invention according to claim 7 is characterized in that, in the invention according to any one of claims 1 to 6, the strands constituting the outermost layer in the radial direction are compressed and deformed from the outside. It is to be.

The stranded conductor of the present invention has a central layer formed by arranging three innermost layer wires at the center, and an outer layer composed of a plurality of layers is provided outside the central layer, and each layer in the outer layer is 3 respectively. The large diameter wires of the book are arranged apart in the circumferential direction, and an even number of small diameter wires smaller than the outer diameter of the large diameter wire are arranged between the large diameter wires arranged at the positions closest to each other in the circumferential direction. As a result, the cross-sectional shape of the stranded conductor can be formed into a perfect circle without compression or at a compression rate lower than that of the prior art 2.

The cross-sectional view of the stranded conductor which concerns on Example 1 of this invention. The cross-sectional view of the stranded conductor which concerns on Example 2 of this invention. A cross-sectional view of an example of a stranded conductor according to a third embodiment of the present invention. The cross-sectional view of the stranded conductor according to the prior art 1. The cross-sectional view of another stranded conductor according to the prior art 1.

A mode for carrying out the present invention will be described with reference to FIGS. 1 to 3. It should be noted that FIGS. 1 to 3 are schematic cross-sectional views cut in a direction orthogonal to the axial direction of the stranded conductor in each embodiment of the present invention, showing the cross-sectional shape of the wire rod which is the basis of each wire and the wire. It is a schematic diagram when the cross-sectional shape is the same. The diagonal lines showing the cross sections of each strand are omitted to avoid complication of the figure.

[Example 1]
FIG. 1 is a schematic cross-sectional view cut in a direction orthogonal to the axial direction of the stranded conductor 1 according to the first embodiment of the present invention.

As shown in FIG. 1, the stranded conductor 1 is formed by twisting a total of 27 strands arranged in the axial direction. These strands are the innermost layer wire (strand wire) 2, the first thick diameter wire (strand wire) 3, the first thin diameter wire (strand wire) 4, the second thick diameter wire (strand wire) 5, and the second thin wire. It is composed of five types of diameter wires (wires) 6. The innermost layer wire 2, the first thick diameter wire 3, the first small diameter wire 4, the second thick diameter wire 5, and the second small diameter wire 6 are based on wire rods having a circular cross section (round shape) having different diameters. It is formed. As these wire rods, a copper wire, a copper wire plated with tin, nickel, or silver, an aluminum wire, various alloy wires, or the like can be used as in the conventional case.

Further, as shown in FIG. 1, the stranded conductor 1 is provided on the outer side of the central layer 11 and the central layer 11, and the outer layer 15 is composed of two layers, a first outer layer 12 and a second outer layer 13. It is composed of. That is, the inner layer 13 is provided inside the outer layer 15.

The central layer 11 is configured by arranging three innermost layer wires 2 in the circumferential direction in the central portion of the stranded conductor 1.

The first outer layer 12 is composed of a total of nine wires, three first thick diameter wires 3 and six first small diameter wires 4 arranged so as to surround the outer periphery of the central layer 11.

As shown in FIG. 1, each first thick diameter line 3 is arranged in a valley portion 17 on the outer side of the adjacent innermost layer lines 2 and 2, and the three first thick diameter lines 3 are separated in the circumferential direction. Are arranged. In the circumferential direction of the first outer layer 12, two even-numbered first small diameter wires 4 are arranged in the circumferential direction between the first thick diameter wires 3 and 3 arranged at the closest positions. ing.

The second outer layer 13 is composed of three second thick diameter wires 5 arranged so as to surround the outer periphery of the first outer layer 12 and twelve second small diameter wires 6 in total of 15.

As shown in FIG. 1, each of the second thick diameter wires 5 is arranged in the valley portion 18 outside the adjacent first thin diameter wires 4 and 4, and the three second thick diameter wires 5 are arranged in the circumferential direction. They are arranged apart. In the circumferential direction of the second outer layer 13, four even-numbered second thin diameter wires 6 are arranged in the circumferential direction between the second thick diameter wires 5 and 5 arranged at the closest positions. ing.

The diameter d ₁ of the first thick wire 3 is formed to be the largest of the five types of strands, and the diameter d ₂ of the innermost layer wire ₂ is formed smaller than the diameter d ₁ of the first thick wire 3. the diameter d ₃ of the diameter d ₂ of the innermost line 2 second thick diameter line 5 is formed to the same diameter d ₄ of the second thin line 6 is smaller than the diameter d ₃ of the second thick diameter line 5 The diameter d ₅ of the first small diameter wire 4 is formed to be smaller than the diameter d ₄ of the second small diameter wire 6.

Then, the outer circumference of the stranded conductor 1 formed as described above can be coated with an insulating material and used for an electric wire or the like.

With the above configuration, the outer shape of the stranded conductor 1 can be a shape close to a substantially perfect circular shape. That is, the distance L1 from the center A to the outermost edge B of the second thick wire 5 forming the second outer layer 13 and the outermost edge C of the second thin wire 6 forming the second outer layer 13 from the center A. The distances L2 to are formed to be substantially the same. That is, as shown in FIG. 1, the outermost edge ends B and C of all the second thick diameter wires 5 and the second small diameter wires 6 forming the second outer layer 13 are from the center A to the second thick diameter wire 5. It is formed so as to be located near a perfect circle line whose radius is the distance L1 to the outermost edge end B.

For example
d ₁ = 1.195d ₂ ... (1)
d ₃ = d ₂ ... (2)
d ₄ = 0.90 d ₂ ... (3)
d ₅ = 0.815d ₂ ... (4)
By setting so as to satisfy the relational expression of, even if the stranded conductor 1 is formed without compression, the distance L1 from the center point A of the stranded conductor 1 to the outermost edge B of the second thick diameter wire 5 And, the distance L2 from the center point A to the outermost edge C of the second small diameter wire 6 to the distance L2 is substantially the same, and the respective strands 2, 3, 4, 5, and 6 are substantially all adjacent to each other. Can be brought into mutual contact with the wires 2, 3, 4, 5, 6 of.

Since the stranded conductor 1 of the first embodiment has the above structure, it has the following actions and effects.

The outer shape of the stranded conductor 1 is made into a substantially circular shape without being compressed, and the strands 2, 3, 4, 5, 6 are substantially all adjacent strands 2, 3, 4, 5, 6. Can be contacted with.

The outer shape of the stranded conductor 1 is substantially circular, and the thickness of the insulating material coating can be made thin and substantially uniform over the entire outer circumference, and the amount of the insulating material can be reduced and the cost can be reduced. ..

Incidentally, wire 2,3,4,5,6 constituting the stranded conductor 1 of the first embodiment, the diameter _{d 1} of the first thick diameter line 3, most larger in the five wire and the diameter d ₂ of the innermost layer line 2, smaller form than the diameter d ₁ of the first thick diameter line 3, the diameter d ₃ of the diameter d ₂ of the innermost line 2 second thick diameter line 5 is the same form Then, the diameter d ₄ of the second small diameter wire 6 is formed smaller than the diameter d ₃ of the second thick diameter wire ₅ , and the diameter d ₅ of the first small diameter wire 4 is the diameter d of the second small diameter wire 6. If it is formed smaller than _4, the stranded wire conductor 1 can be formed by using a wire having an arbitrary diameter other than the wire having the diameter described above.

Further, the stranded conductor 1 may be formed by compressing the outer peripheral portion of the second outer layer 13 with a compression die or the like. By this compression, the outer peripheral portion of the second outer layer 13 is compressed and deformed, and the outer shape of the stranded conductor can be made closer to a perfect circular shape. The compression with 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. The compression rate is arbitrarily set.

Since the stranded conductor 1 of the first embodiment can be formed without compression or at a compression rate lower than that of the stranded conductor of the prior art 2, it has stretch characteristics, flexibility, and flexibility. The physical properties such as the above can be improved as compared with the stranded conductor of the above-mentioned prior art 2.

[Example 2]
As shown in FIG. 2, the stranded conductor 21 of the second embodiment has a third outer layer 22 provided on the outside of the second outer layer 13 of the first embodiment, and the outer layer 23 is composed of three layers.

The third outer layer 22 is composed of three third thick diameter wires 25 arranged so as to surround the outer periphery of the second outer layer 13 and 18 third thin diameter wires 26, for a total of 21 wires. The conductor 21 is composed of a total of 48 strands.

As shown in FIG. 2, each of the third thick diameter wires 25 is the four second wires arranged between the second thick diameter wires 5 and 5 arranged at the closest positions in the second outer layer 13. Among the small diameter wires 6, the second small diameter wire 6 arranged in the central portion in the circumferential direction and the valley portion 27 outside the 6 are arranged, and the three third large diameter wires 25 are separated in the circumferential direction. Are arranged. In the circumferential direction of the third outer layer 22, six even-numbered third small diameter wires 26 are arranged in the circumferential direction between the third thick diameter wires 25 and 25 arranged at the closest positions. ing.

The diameter _{d 6} of the third thick diameter line 25 is formed and the diameter _{d 2} of the innermost layer line 2 the same as the diameter _{d 3} of the second thick diameter line 5, the diameter _{d 7} of the third small-diameter wire 26, the smaller than the diameter d ₃ of 2 thick diameter line 5, and is formed to be larger than the diameter d ₄ of the second thin line 6.

For example
d ₁ = 1.195d ₂ ... (1)
d ₃ = d ₂ ... (2)
d ₄ = 0.90 d ₂ ... (3)
d ₅ = 0.815d ₂ ... (4)
d ₆ = d ₂ ... (5)
d ₇ = 0.925d ₂ ... (6)
By setting so as to satisfy the relational expression of, even if the stranded conductor 21 is formed without compression, the distance from the center point A of the stranded conductor 1 to the third thick diameter wire 25 and the center point A The distance from the third small diameter wire 26 to the outermost edge is substantially the same, and each of the strands 2,3,4,5,6,25,26 is approximately all the adjacent strands 2,3. It can be brought into mutual contact with 4, 5, 6, 25, 26.

Since the configurations other than the above are the same as those in the first embodiment, the same reference numerals as those in the first embodiment will be added and the description thereof will be omitted.

In the second embodiment as well, the same actions and effects as those in the first embodiment are exhibited.

In the second embodiment, the diameter d ₇ of the third small diameter wire 26 is formed to be smaller than the diameter d ₃ of the second thick diameter wire 5 and larger than the diameter d ₄ of the second small diameter wire 6. However, the diameter d ₇ of the third small diameter wire 26 may be formed to be the same as the diameter d ₄ of the second small diameter wire 6.

[Example 3]
The outer layer can be formed in any number as long as it is composed of a plurality of layers, and each layer constituting the outer layer is arranged with three large diameter wires separated in the circumferential direction, and is the most in the circumferential direction. An even number of small diameter wires smaller than the outer diameter of the large diameter wire are arranged between the large diameter wires arranged at close positions.

For example, as shown in FIG. 3, the stranded conductor 31 is provided with a fourth outer layer 32 outside the third outer layer 22 of the second embodiment, the outer layer 33 is composed of four layers, and the fourth outer layer 32 is It is composed of three fourth thick diameter wires 35 arranged so as to surround the outer circumference of the third outer layer 22 and 24 fourth small diameter wires 36 in total, and the total number of stranded conductors 31 is 75. It is composed of the wire of the book.

As shown in FIG. 3, each of the fourth thick diameter wires 35 is formed by six second wires arranged between the third thick diameter wires 25 and 25 arranged at the closest positions in the third outer layer 22. Of the small diameter wires 6, the third small diameter wire 26 arranged in the central portion in the circumferential direction and the valley portion 37 outside the 26 are arranged, and the three fourth large diameter wires 35 are separated in the circumferential direction. Are arranged. In the circumferential direction of the fourth outer layer 32, eight fourth thin diameter wires 36, which are an even number, are arranged in the circumferential direction between the fourth thick diameter wires 35 and 35 arranged at the closest positions. ing.

The diameter d ₈ of the fourth thick wire 35 is formed to be smaller than the diameter d ₁ of the first thick wire 3 and larger than the diameter d ₃ of the second thick wire 5, and the diameter of the fourth thin wire 36. d ₉ is formed to be smaller than the diameter d ₇ of the third small diameter wire 26 and larger than the diameter d ₄ of the second small diameter wire 6.

Since the configurations other than the above are the same as those in the second embodiment, the same reference numerals as those in the second embodiment will be added and the description thereof will be omitted.

Also in the third embodiment, the same actions and effects as those of the first and second embodiments are exhibited.

1,2,31 Twisted wire conductor 2 Innermost layer wire 3,5,25,35 Thick diameter wire 3 First thick diameter wire (thick diameter wire)
4, 6, 26, 36 Small diameter wire 4 First small diameter wire (small diameter wire)
5 2nd thick wire (thick wire)
6 Second small diameter wire (small diameter wire)
11 Central layer 12 1st outer layer 13 2nd outer layer 15, 23, 33 outer layer,
22 Third outer layer 25 Third thick wire (thick diameter wire)
26 Third small diameter wire (small diameter wire)

Generally, as shown in FIG. 4, three strands 101 are arranged in the central portion to form a central layer 102, and nine strands 103 are arranged in the circumferential direction on the outside of the central layer 102. the first inner layer 104 provided arranged, arranged outside the first inner layer 104, in the 15 strands 105 circumferentially concentrically to the outer layer 106 provided disposed twisting sequence, identical to it A stranded conductor 110 formed by twisting in a direction is known, and the strands 101, 103, and 105 constituting the stranded conductor 110 are all made of strands having the same diameter.

Further, as shown in FIG. 5, the same central layer 102 and the stranded conductor 110 has a first inner layer 104 and outer layer 106, on the outside of the outer layer 106, the same as the diameter of the wire 101, 103, 105 A twisted wire conductor 201 formed by arranging 21 strands of a diameter 111 in a concentric twisted array provided with an outermost layer 112 and twisting them in the same direction is known. Hereinafter, the stranded conductors 110 and 201 will be referred to as the prior art 1.

The stranded conductor of the prior art 2, when passing the wire in compression die, the outer layer containing line, by being compressed and deformed from the outside, Nobi properties, flexibility, that the physical properties of flexibility, etc. may be impaired There is a problem.

In order to solve the above-mentioned problems, the invention according to claim 1 has a central layer formed by arranging three innermost layer lines at the center, and a first outer layer provided outside the central layer. , An outer layer having at least a second outer layer provided outside the first outer layer is provided.
In each layer in the outer layer, three large diameter wires are arranged apart from each other in the circumferential direction, and between the large diameter wires arranged at the positions closest to each other in the circumferential direction, from the outer diameter of the large diameter wire. Small diameter wires are arranged in the even-numbered circumference direction ,
The thick diameter wire forming the first outer layer is arranged in the outer valley portion formed by the innermost layer line adjacent to each other in the circumferential direction.
The large-diameter wires that form each layer provided on the outside of the first outer layer form an inner layer of the layer, and an even number of small-diameter wires that are arranged in the circumferential direction between the large-diameter lines. Of these, it is characterized in that it is arranged in an outer valley portion composed of two small diameter wires located in the central portion in the circumferential direction .

Claims (7)

It has a central layer formed by arranging three innermost layer lines in the center, and an outer layer composed of a plurality of layers is provided outside the central layer.
In each layer in the outer layer, three large diameter wires are arranged apart from each other in the circumferential direction, and between the large diameter wires arranged at the positions closest to each other in the circumferential direction, from the outer diameter of the large diameter wire. A stranded conductor characterized by arranging an even number of small diameter wires. The outer layer is composed of a first outer layer provided outside the central layer and a second outer layer provided outside the first outer layer.
The first outer layer is arranged with three first thick diameter wires separated in the circumferential direction, and the first thick diameter wire is arranged between the first thick diameter wires arranged at the positions closest to each other in the circumferential direction. Two first small diameter wires smaller than the outer diameter of
The second outer layer is arranged with three second thick diameter wires separated in the circumferential direction, and the second thick diameter wire is arranged between the second thick diameter wires arranged at the positions closest to each other in the circumferential direction. The stranded conductor according to claim 1, wherein four second small diameter wires smaller than the outer diameter of the above are arranged. The outer diameter of the second thick wire is smaller than the outer diameter of the first thick wire, the outer diameter of the second small diameter wire is smaller than the outer diameter of the second thick wire, and the first small diameter wire The stranded wire conductor according to claim 2, wherein the outer diameter of the second small diameter wire is smaller than the outer diameter of the second small diameter wire, and the outer diameter of the second thick diameter wire and the outer diameter of the innermost layer wire are the same. The outer layer is composed of a first outer layer provided outside the central layer, a second outer layer provided outside the first outer layer, and a third outer layer provided outside the second outer layer.
The first outer layer is arranged with three first thick diameter wires separated in the circumferential direction, and the first thick diameter wire is arranged between the first thick diameter wires arranged at the positions closest to each other in the circumferential direction. Two first small diameter wires smaller than the outer diameter of
The second outer layer is arranged with three second thick diameter wires separated in the circumferential direction, and the second thick diameter wire is arranged between the second thick diameter wires arranged at the closest positions in the circumferential direction. 4 second small diameter wires smaller than the outer diameter of
The third outer layer is arranged with three third thick diameter wires separated in the circumferential direction, and the third thick diameter wire is arranged between the third thick diameter wires arranged at the closest positions in the circumferential direction. The stranded conductor according to claim 1, wherein six third small diameter wires smaller than the outer diameter of the above are arranged. The outer diameter of the second thick wire is smaller than the outer diameter of the first thick wire, the outer diameter of the third small diameter wire is smaller than the outer diameter of the second thick wire, and the second small diameter wire The outer diameter of the first small diameter wire is smaller than the outer diameter of the third small diameter wire, and the outer diameter of the first small diameter wire is smaller than the outer diameter of the second small diameter wire.
The stranded conductor according to claim 4, wherein the outer diameter of the second thick wire, the outer diameter of the third thick wire, and the outer diameter of the innermost layer wire are the same. The outer diameter of the second thick wire is smaller than the outer diameter of the first thick wire, the outer diameter of the third small diameter wire is smaller than the outer diameter of the second thick wire, and the first small diameter wire The outer diameter of is smaller than the outer diameter of the third small diameter wire,
The outer diameter of the second small diameter wire is the same as the outer diameter of the third small diameter wire.
The stranded conductor according to claim 4, wherein the outer diameter of the second thick wire, the outer diameter of the third thick wire, and the outer diameter of the innermost layer wire are the same. The stranded conductor according to any one of claims 1 to 6, wherein the wire forming the outermost layer in the radial direction is compression-deformed from the outside.

Images