JP2023137850A - Twined conductor - Google Patents

Abstract

To provide a twined conductor capable of manufacturing a cross-sectional shape of a twined conductor into a shape close to a complete round without compressing, or at a low compression rate.SOLUTION: Two outer thick diameter wires 2, 2, and two outer thin diameter wires 3, 3, which are thinner than the outer thick diameter wire 2, are arranged alternately in a peripheral direction, and inside of a valley portion 11 between adjacent two outer thick diameter wires 2,2, one first inner layer wire 4 is arranged to separate and between two outer thick diameter wires 2,2 adjacent in a peripheral direction, and inside in a diameter direction of the twined conductor 1 in adjacent two outer thin diameter wires 2,2, two second inner layer wires 5,5 are arranged in a peripheral direction, inside of a valley part 12 of the adjacent two second inner layer wires 5,5, one third inner layer wire 6 is arranged, an inside end 6a in a diameter direction of the twined conductor 1 in the third inner layer wire 6 is located on a center A side of the twine conductor 1 than an inside end 4a in a diameter direction of the twined conductor 1 in the first inner layer wire 4, and a center layer 15 is arranged on a center side of the twined conductor 1 in a plurality of the third inner layer wires 3 arranged in a peripheral direction.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to stranded wire conductors.

BACKGROUND ART Conventionally, each strand of wire constituting a stranded conductor used in electric wires and the like is generally a round wire with a circular cross section and the same diameter. Copper wire is mainly used as the wire, and the copper wire is plated with tin, nickel, silver, aluminum, or various alloys.

As shown in FIG. 8, as a stranded conductor with a concentric twist structure, a single strand 102 at the center of a stranded conductor 101 is used as a core, and six strands 103 surround it to form an inner layer. Further, it is known that the outer periphery is surrounded by 12 strands 104 to form an outer layer, and the strands are twisted in the same direction to form 19 strands. In addition, the outer periphery of the stranded conductor 101 is covered and surrounded by 18 strands of strands, and the stranded conductor has a concentrically twisted configuration consisting of 37 strands of wire, and the outer periphery of the stranded conductor 101 is further covered and surrounded by 24 strands of strands. Also known is a stranded conductor with a concentrically twisted configuration consisting of 61 strands.

Since the wires 102, 103, and 104 all have a circular cross section and the same diameter, when the wires 102, 103, and 104 are arranged in a standard core wire arrangement to form the stranded wire conductor 101, its outer peripheral shape As shown in FIG. 8, the shape is approximated to a hexagonal shape, and the shape is not approximated to a round shape. Hereinafter, this will be referred to as prior art 1.

Generally, as shown in FIG. 8, the stranded conductor 101 is coated with an insulating material 106 on its outer periphery and is used as an electric wire (covered wire) or the like 107. Reducing the weight of the insulating material 106 is important from the standpoint of effective resource utilization, and for this reason, it is desirable that the cross-sectional shape of the stranded conductor be a perfect circle.

However, if a stranded conductor is constructed with strands of the same diameter and 19 concentrically twisted arrays, the cross-sectional shape of the stranded conductor 101 becomes hexagonal, as shown in FIG. The thickness of the insulating material 106 is thin near the apex and becomes thicker from the apex to the side, and the thickness of the insulating material 106 is non-uniform. In addition, in order to prevent breakdown voltage defects, the thickness of the insulating material 106 at the vertex is the standard, and the thickness of the insulating material 106 at the sides is redundant and wasteful.From this point of view, the cross-sectional shape of the stranded wire conductor is It is desired that it be a circle.

Furthermore, 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 stripping the insulating material 106 during end processing of a coated wire or the like.

Similarly, in the case of collectively assembled stranded wires other than the concentric strand arrangement, it is desired that the cross-sectional shape of the stranded wire conductor be a perfect circle. Further, it is important to uniformly cover the stranded conductor with the insulating material from the viewpoint of electrical properties such as withstand voltage.

As a method of making the cross-sectional shape of the stranded wire conductor a perfect circle, for example, as described in Patent Document 1, by passing wires 202 having a circular cross-section and the same diameter through a compression die while twisting them in one direction. As shown in FIG. 9, a method has been proposed in which the cross-sectional shape of the stranded wire conductor 201 is made substantially circular. Hereinafter, this will be referred to as prior art 2.

Japanese Patent Application Publication No. 11-25758

In the above-mentioned stranded wire conductor 201 of Prior Art 2, when the wire 202 is passed through a compression die, the outer layer wire is compressed and deformed, so that physical properties such as elongation characteristics, flexibility, flexibility, etc. are impaired. There is a problem.

Furthermore, since the stranded wire conductor 201 of Prior Art 2 needs to pass through a compression die while being twisted in one direction, an extra compression die is required compared to the stranded wire conductor 101 of Prior Art 1; Since the dies are worn and damaged during the production of the stranded wire conductor 201, regular replacement is required, resulting in an increase in cost.

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

In addition, in the conventional stranded conductors 101 and 201, the adjacent strands are arranged so that they are all in contact with each other, so the density of the strand arrangement is high, there is no gap between the adjacent strands, and there is no space between adjacent strands. There is a problem in that physical properties such as properties, flexibility, flexibility, etc. are impaired.

Therefore, by compressing the strands without compression or at a compression rate lower than that in Prior Art 2, the cross-sectional shape of the stranded wire conductor can be made closer to a perfect circular shape. The purpose is to provide the following.

In order to solve the above-mentioned problem, the invention according to claim 1 arranges two outer thick diameter wires and two outer thin diameter wires that are thinner than the outer thick diameter wires alternately in the circumferential direction. A stranded wire conductor having an outermost layer comprising:
One first inner layer wire is arranged inside the valley between two adjacent outer thick diameter wires, and a plurality of first inner layer wires are arranged spaced apart in the circumferential direction,
two second inner layers in the circumferential direction between two outer thick diameter wires that are spaced apart and adjacent in the circumferential direction, and on the inside in the radial direction of the stranded wire conductor in the two adjacent outer thin diameter wires; the second inner layer wire is formed thinner than the first inner layer wire,
One third inner layer wire is arranged inside the valley between two adjacent second inner layer wires, and a plurality of third inner layer wires are arranged spaced apart in the circumferential direction, 3. The inner layer line is formed thicker than the second inner layer line,
The radially inner end of the stranded conductor in the third inner layer wire is located closer to the center of the stranded conductor than the radially inner end of the stranded conductor in the first inner layer wire,
The present invention is characterized in that a center layer is provided on the center side of the stranded wire conductor in a plurality of third inner layer wires arranged in the circumferential direction.

The invention according to claim 2 is the invention according to claim 1, in which the center layer is formed by one center line, or one center line and a plurality of first center layer lines disposed outside the center line. It is characterized by the following structure.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the center layer is composed of one center line, and the number of the first inner layer wires is the same as the number of the third inner layer wires. The diameter of the third inner layer wire and the diameter of the center line are the same.

The invention according to claim 4 is the invention according to claim 1 or 2, wherein the center layer is composed of one center line and a plurality of first center layer lines disposed outside the center line, and The present invention is characterized in that the number of first inner layer wires, the number of third inner layer wires, and the number of first center layer wires are the same.

The invention according to claim 5 is the invention according to any one of claims 1 to 4, in which the distance from the center of the stranded conductor to the outer edge end of the outer large diameter wire and the distance of the stranded conductor are It is characterized in that the distance from the center to the outer edge end of the outer thin diameter wire is the same.

The invention according to claim 6 is the invention according to any one of claims 1 to 5, characterized in that the strands constituting the outermost layer are compressively deformed from the outside.

According to the present invention, there is provided a stranded conductor in which two outer diameter wires and two outer diameter wires that are thinner than the outer diameter wires are arranged alternately in the circumferential direction to constitute the outermost layer. , one first inner layer wire is arranged inside the valley between two adjacent outer thick diameter wires, and the first inner layer wires are arranged and spaced apart in a plurality of circumferential directions. and two second inner layers in the circumferential direction between the two circumferentially adjacent outer large-diameter wires and radially inside the center of the stranded wire conductor in the two adjacent outer thin-diameter wires. A second inner layer wire is formed to be thinner than the first inner layer wire, and one third inner layer wire is arranged inside the valley between two adjacent second inner layer wires, A plurality of third inner layer wires are arranged spaced apart in the circumferential direction, the third inner layer wire is formed thicker than the second inner layer wire, and the radially inner end of the stranded wire conductor in the third inner layer wire is connected to the first inner layer wire. The center layer is located on the center side of the stranded conductor from the radially inner end of the stranded conductor in the inner layer wire, and is configured on the center side of the stranded conductor in the plurality of third inner layer wires arranged in the circumferential direction. Accordingly, the cross-sectional shape of the stranded wire conductor can be made into a substantially perfect circular shape, and the weight of the stranded wire conductor can be reduced and flexibility can be improved.

Furthermore, unlike the stranded conductor 201 of Prior Art 2, the stranded conductor of the present invention can have an approximately 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 its physical properties such as elongation, flexibility, flexibility, etc., and it is possible to obtain highly reliable quality. It can be used effectively in various fields.

1 is a cross-sectional view of a stranded conductor according to Example 1 of the present invention. FIG. 3 is a cross-sectional view showing an example of a stranded conductor according to Example 3 of the present invention. FIG. 3 is a cross-sectional view showing another example of the stranded wire conductor according to Example 3 of the present invention. FIG. 4 is a cross-sectional view showing an example of a twisted wire conductor according to Example 4 of the present invention. FIG. 4 is a cross-sectional view showing another example of the stranded wire conductor according to Example 4 of the present invention. FIG. 5 is a cross-sectional view showing an example of a twisted wire conductor according to Example 5 of the present invention. FIG. 7 is a cross-sectional view showing another example of the stranded wire conductor according to Example 5 of the present invention. FIG. 1 is a cross-sectional view of a stranded conductor according to prior art 1; FIG. 2 is a cross-sectional view of a stranded wire conductor according to prior art 2.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A mode for carrying out the present invention will be described based on the drawings.

[Example 1]
FIG. 1 is a cross-sectional view of a stranded conductor 1 according to Embodiment 1 of the present invention, cut in a direction perpendicular to the axial direction, and diagonal lines indicating the cross sections of each strand are omitted to avoid complication of the diagram. did.

The stranded wire conductor 1 is composed of six types of wires: an outer thick wire 2, an outer thin wire 3, a first inner layer wire 4, a second inner layer wire 5, a third inner layer wire 6, and a center wire 7. . The first inner layer wire 4 and the third inner layer wire 6 are each composed of three wires, and the outer thick diameter wire 2, the outer thin diameter wire 3, and the second inner layer wire 5 are each composed of two wires equal to the number of the third inner layer wires 6. It is made up of six pieces, which is twice as many.

The wire material that is the base of each wire 2, 3, 4, 5, 6, 7 is copper such as bare copper wire, oxygen-free copper wire, linear crystal oxygen-free copper wire, single crystal high purity oxygen-free copper wire, etc. Wires such as copper wires plated with tin, nickel, silver, etc., aluminum wires, various alloy wires, and insulating coated wires such as enameled wires, litz wires, and formal wires can be used. The same material or different materials may be used for each of the wires 2, 3, 4, 5, 6, and 7.

As shown in FIG. 1, one set consists of two outer diameter wires 2, 2 disposed so as to abut each other in the circumferential direction around the center A of the stranded wire conductor 1. Three sets of outer thick diameter wires 2, 2 are arranged so as to be spaced apart from each other in the circumferential direction.

Between a set of outer thick diameter wires 2, 2 and a set of outer thick diameter wires 2, 2 adjacent in the circumferential direction centering on the center A of the stranded wire conductor 1, two outer thin diameter wires 3, 3 are arranged so as to abut each other in the circumferential direction. Two outer thin diameter wires 3, 3 are arranged in the circumferential direction as one set, and one set of outer thin diameter wires 3, 3 are arranged so as to be spaced apart from each other in three sets in the circumferential direction. has been done.

The three sets of outer diameter wires 2, 2 and the three sets of outer diameter wires 3, 3 constitute an outermost layer 10, which is the outermost layer in the stranded conductor 1. In the outermost layer, a set of outer thick diameter wires 2, 2 and a set of outer thin diameter wires 3, 3 are arranged alternately in the circumferential direction.

Inside the valley part 11 between the pair of outer thick diameter wires 2, 2, one first inner layer wire 4 is arranged so as to abut on the pair of outer thick diameter wires 2, 2. . Three first inner layer wires 4 are arranged so as to be spaced apart from each other in the circumferential direction around the center A of the stranded wire conductor 1.

Between the two outer thick diameter wires 2, 2 which are spaced apart and adjacent in the circumferential direction, and between the two adjacent outer thin diameter wires 3, 3, radially inside the center of the stranded wire conductor 1, Two second inner layer wires 5, 5 are arranged so as to abut each other in the circumferential direction. One set includes two second inner layer wires 5, 5 arranged in the circumferential direction, and three sets of one set of second inner layer wires 5, 5 are arranged so as to be spaced apart from each other in the circumferential direction. has been done. The second inner layer wire 5 is arranged so as to be in contact with the adjacent outer thick diameter wire 2, outer thin diameter wire 3, and second inner layer wire 5.

One third inner layer wire 6 is disposed inside the valley portion 12 of the pair of second inner layer wires 5,5. Three third inner layer wires 6 are arranged so as to be spaced apart from each other in the circumferential direction around the center A of the stranded wire conductor 1. The third inner layer wire 6 is arranged so as to come into contact with a pair of adjacent second inner layer wires 5, 5 and a pair of circumferentially adjacent first inner layer wires 4, 4.

The radially inner end 6a of the stranded conductor 1 of the third inner layer wire 6 is located closer to the center A of the stranded conductor 1 than the radially inner end 4a of the stranded conductor 1 in the first inner layer wire 4. It is arranged like this.

One center line 7 is disposed on the center side of the stranded conductor 1 among the three third inner layer wires 6 so as to be in contact with the three third inner layer wires 6. The center line 7 is in contact with the three third inner layer wires 6, but a gap 13 is formed between the center line 7 and the first inner layer wires 4, so that the center line 7 and the first inner layer wires 4 are not in contact with each other. It has become.

A center layer 15 is constituted by one center line 7.

The diameter d1 of the outer thick diameter wire 2 is set larger than the diameter d3 of the first inner layer wire 4, and the diameter d3 of the first inner layer wire 4 is set larger than the diameter d2 of the outer thin diameter wire 3. The diameter d2 of the third inner layer wire 6 is set larger than the diameter d5 of the third inner layer wire 6, and the diameter d5 of the third inner layer wire 6 and the diameter d6 of the center line 7 are set to be the same diameter. The diameter d5 is set larger than the diameter d4 of the second inner layer wire 5.

In the first embodiment, each strand 2 satisfies the following relationships: d1 = 1.70 x d5, d2 = 1.16 x d5, d3 = 1.28 x d5, d4 = 0.86 x d5, d6 = d5. , 3, 4, 5, 6, and 7 were used.

In addition, the cross-sectional shape of the stranded wire conductor 1 is approximately a perfect circle, that is, the distance L1 from the center A of the center line 7 to the outermost edge B of the outer thick diameter wire 2, and the distance L1 from the center A of the center line 7 to the outer thin diameter The lines 3 are formed so that the distance L2 to the outermost edge C is the same.

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

Since the outer shape of the stranded wire conductor 1 can be formed into a substantially perfect circular shape, the thickness of the insulating material coating can be made substantially uniform, so that the amount of the insulating material can be reduced and the cost can be reduced.

Furthermore, unlike the stranded conductor 201 of Prior Art 2, the stranded conductor 1 can have an approximately perfect circular outer shape without passing the strands through a compression die. , it is possible to maintain the physical properties of the strand without impairing its physical properties such as flexibility and pliability, and it is possible to obtain highly reliable quality, making it suitable for the automotive electric wire field and the acoustic electric wire field. It can be used effectively in such situations.

In addition, compared to conventional techniques 1 and 2, the stranded wire conductor 1 has physical properties such as elongation characteristics, flexibility, and flexibility by increasing the internal porosity and lowering the arrangement density of the strands. can be improved.

[Example 2]
In the strands constituting the stranded conductor 1 of Example 1, the diameter d1 of the outer thick wire 2 is larger than the diameter d3 of the first inner layer wire 4, and the diameter d3 of the first inner layer wire 4 is larger than the outer thin diameter. The diameter d2 of the outer thin wire 3 is thicker than the diameter d5 of the third inner layer wire 6, and the diameter d5 of the third inner layer wire 6 is the same as the diameter d6 of the center line 7. If the diameter d5 of the third inner layer wire 6 is larger than the diameter d4 of the second inner layer wire 5, each strand 2, 3, 4, 5, 6, 7 and the stranded conductor 1 are constructed, The stranded conductor 1 can be constructed using any other wire than the wire having the diameter described in Example 1 above. Alternatively, the stranded conductor 1 may be compressed from the outside of the outermost layer 10, which is the outermost layer, using a compression die or the like.

Due to this compression, the outer peripheral portions of the outer large diameter wire 2 and the outer thin diameter wire 3 that constitute the outermost layer 10 are compressively deformed, and the outer shape of the stranded wire conductor can be made closer to a perfect circular shape. Compression using a compression die or the like may be performed when manufacturing the stranded conductor 1, or after manufacturing the stranded conductor 1. Note that the compression rate can be set arbitrarily.

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

The second embodiment can also exhibit the same effects as the first embodiment.

[Example 3]
In the above embodiments 1 and 2, the first inner layer wire 4 and the third inner layer wire 6 are each composed of three wires, and the outer thick diameter wire 2, the outer thin diameter wire 3, and the second inner layer wire 5 are The number of the first inner layer wires 4 and the number of the third inner layer wires 6 are the same, and the number of the outer thick diameter wires 2 and the outer thin diameter wires are configured with six wires, which is twice the number of the third inner layer wires 6. The number of wires 3 and the number of second inner layer wires 5 may each be twice the number of third inner layer wires 6, and may be any number as long as the number of third inner layer wires 6 is three or more. Can be set.

The outer thick diameter wire 2, the outer thin diameter wire 3, the first inner layer wire 4, the second inner layer wire 5, the third inner layer wire 6, and the center line 7 are provided in the same manner as in the first and second embodiments.

For example, as shown in FIG. In the case of the stranded conductor 21 having eight wires, which is twice the number of wires 6, d1=1.06×d5, d2=0.61×d5, d3=0.75×d5, d4=0. By using wire rods that serve as the basis for each of the wires 2, 3, 4, 5, 6, and 7 that satisfy the relationship of 47×d5, d6=d5, the cross section of the stranded wire conductor 21 can be compressed without compression or with a low compression rate. The shape can be a substantially perfect circle.

For example, as shown in FIG. In the case of the stranded conductor 22 having 10 wires, which is twice the number of wires 6, d1=0.80×d5, d2=0.54×d5, d3=0.70×d5, d4=0. By using wire rods that serve as the basis for each of the strands 2, 3, 4, 5, 6, and 7 that satisfy the relationship of 50×d5, d6=d5, the cross section of the stranded wire conductor 22 can be compressed without compression or with a low compression rate. The shape can be a substantially perfect circle.

The other structures are the same as those in the first and second embodiments, so the explanation will be omitted.

The third embodiment can also exhibit the same effects as those of the first and second embodiments.

[Example 4]
In Examples 1 to 3 above, the diameter d5 of the third inner layer wire 6 and the diameter d6 of the center line 7 are the same diameter, but the diameter d5 of the third inner layer wire 6 and the diameter d6 of the center line 7 are different diameters. You can also use it as

The outer thick diameter wire 2, the outer thin diameter wire 3, the first inner layer wire 4, the second inner layer wire 5, the third inner layer wire 6, and the center line 7 are provided in the same manner as in Examples 1 to 3 above.

For example, as shown in FIG. In the case of the stranded conductor 31 having eight wires, which is twice the number of wires 6, d1=1.188×d5, d2=0.719×d5, d3=0.938×d5, d4=0. By using wire rods that form the basis of each strand 2, 3, 4, 5, 6, and 7, which satisfy the relationship of 563 x d5, d6 = 1.250 x d5, the stranded wire can be twisted without compression or with a low compression rate. The conductor 31 can have a substantially perfect circular cross-sectional shape.

For example, as shown in FIG. In the case of the stranded conductor 32 having 14 wires, which is twice the number of wires 6, d1=0.750×d5, d2=0.413×d5, d3=0.625×d5, d4=0. By using wire rods as the base of each strand 2, 3, 4, 5, 6, and 7 that satisfy the relationship of 375 x d5, d6 = 2.125 x d5, the stranded wire can be twisted without compression or with a low compression rate. The conductor 32 can have a substantially perfect circular cross-sectional shape.

The other structures are the same as those in Examples 1 to 3 above, and therefore their explanation will be omitted.

The fourth embodiment can also exhibit the same effects as those of the first to third embodiments.

[Example 5]
In the above Examples 1 to 4, the center layer 15 was composed of one center line 7, but the number of layers constituting the center layer and the number of strands constituting each layer can be set arbitrarily. can.

For example, as shown in FIG. The stranded conductor 41 is composed of 14 wires, which is twice the number of wires 6.

A center layer 42 provided inside the third inner layer wire 6 is connected to one center line 43 and seven first layers provided outside the center line 43 and the same number as the third inner layer wires 6. It is composed of a central layer line 44.

The diameter of the center line 43 is d6, the diameter of the first center layer line 44 is d7, d1=0.750×d5, d2=0.413×d5, d3=0.625×d5, d4=0.375× By using the wire rods that form the basis of each strand 2, 3, 4, 5, 6, 7, and 8 that satisfy the relationships of d5, d6 = 0.975 x d5, d7 = 0.750 x d5, it is possible to Alternatively, the stranded wire conductor 41 can have a substantially perfect circular cross-sectional shape with a low compression ratio.

For example, as shown in FIG. The stranded wire conductor 51 is made up of 14 wires, which is twice the number of the third inner layer wires 6, and the center layer 52 provided inside the third inner layer wire 6 is connected to one center line 53 and the center line 53. It is configured with seven first center layer wires 54 disposed on the outside and the same number as the third inner layer wires 6, and the first center layer wires 54 are spaced apart in the circumferential direction.

The diameter of the center line 53 is d6, the diameter of the first center layer line 54 is d7, d1=0.750×d5, d2=0.413×d5, d3=0.625×d5, d4=0.375× By using the wire rods that form the basis of each strand 2, 3, 4, 5, 6, 7, and 8 that satisfy the relationships of d5, d6 = 1.250 x d5, d7 = 0.625 x d5, it is possible to Alternatively, the stranded wire conductor 51 can have a substantially perfect circular cross-sectional shape with a low compression rate.

The other structures are the same as those in Examples 1 to 4 above, so the explanation will be omitted.

The fifth embodiment can also exhibit the same effects as those of the first to fourth embodiments.

1, 21, 22, 31, 32, 41, 51 Stranded wire conductor 2 Outer thick diameter wire 3 Outer thin diameter wire 4 First inner layer wire 5 Second inner layer wire 6 Third inner layer wire 7, 43, 53 Center line 10 Most Outer layer 15, 42, 52 Center layer 44, 54 First center layer line

Claims (6)

A stranded wire conductor in which two outer thick diameter wires and two outer thin diameter wires that are thinner than the outer thick diameter wires are arranged alternately in the circumferential direction to constitute the outermost layer,
One first inner layer wire is arranged inside the valley between two adjacent outer thick diameter wires, and a plurality of first inner layer wires are arranged spaced apart in the circumferential direction,
two second inner layers in the circumferential direction between two outer thick diameter wires that are spaced apart and adjacent in the circumferential direction, and on the inside in the radial direction of the stranded wire conductor in the two adjacent outer thin diameter wires; the second inner layer wire is formed thinner than the first inner layer wire,
One third inner layer wire is arranged inside the valley between two adjacent second inner layer wires, and a plurality of third inner layer wires are arranged spaced apart in the circumferential direction, 3. The inner layer line is formed thicker than the second inner layer line,
The radially inner end of the stranded conductor in the third inner layer wire is located closer to the center of the stranded conductor than the radially inner end of the stranded conductor in the first inner layer wire,
A stranded wire conductor characterized in that a center layer is provided on the center side of the stranded wire conductor in a plurality of third inner layer wires arranged in a circumferential direction. 2. The stranded wire conductor according to claim 1, wherein the center layer is composed of one center line, or one center line and a plurality of first center layer wires disposed outside the center line. The center layer is composed of one center line, the number of the first inner layer wires is the same as the number of the third inner layer wires, and the diameter of the third inner layer wire is the same as the diameter of the center line. The stranded wire conductor according to claim 1 or 2, characterized in that they are the same. The center layer is composed of one center line and a plurality of first center layer wires disposed outside the center line, and the number of the first inner layer wires, the number of the third inner layer wires, and the third inner layer wires are different from each other. The stranded wire conductor according to claim 1 or 2, characterized in that the number of wires in each center layer is the same. A claim characterized in that the distance from the center of the stranded conductor to the outer edge of the outer large diameter wire is the same as the distance from the center of the stranded conductor to the outer edge of the outer thin diameter wire. The stranded wire conductor according to any one of items 1 to 4. The stranded wire conductor according to any one of claims 1 to 5, wherein the strands constituting the outermost layer are compressively deformed from the outside.

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