JP2024044072A - Stranded Conductor - Google Patents

Abstract

An object of the present invention is to provide a stranded wire conductor that can be manufactured into a cross-sectional shape close to a perfect circle without compression or with a low compression rate.
[Solution]
A plurality of first outer thick diameter wires 2 are provided spaced apart in the circumferential direction, and a first outer thin diameter wire 4 is provided spaced apart between the first outer thick diameter wires 2, 2 adjacent in the circumferential direction. Two second outer thick diameter wires 3 are provided spaced apart between the first outer thin diameter wires 4, 4, and one second outer thin diameter wire 5 is provided between the second outer thick diameter wires 3, 3. Two wires are provided in the main or circumferential direction, an inner thick diameter wire 6 is arranged radially inside the second outer thin diameter wire 5, and two inner thick diameter wires 6 are provided between adjacent inner thick diameter wires 6 in the circumferential direction. The inner thin diameter wires 7, 7 are arranged in the circumferential direction, and the inner thin diameter wire 7 is placed inside the valley portion 16 between the first outer thick diameter wire 2 and the first outer thin diameter wire 4 adjacent in the circumferential direction. Established.
[Selection diagram] Figure 1

Description

The present invention relates to a stranded conductor.

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.

For example, a concentrically twisted stranded conductor consisting of 19 strands is generally formed as shown in FIG. 11 by surrounding a single strand 102 at the center of the stranded conductor 101 with six strands 103 surrounding it to form an inner layer, and then surrounding the outer periphery with 12 strands 104 to form an outer layer, which are twisted in the same direction. Also used are concentrically twisted stranded conductors consisting of 37 strands, with 18 strands surrounding the outer periphery of the stranded conductor 101, and concentrically twisted stranded conductors consisting of 61 strands, with 24 strands surrounding the outer periphery.

Since the strands 102, 103, and 104 all have a circular cross section and the same diameter, when the stranded conductor 101 is formed by arranging the strands 102, 103, and 104 in a standard core arrangement, the outer periphery of the conductor 101 will be a shape that approximates a hexagon, as shown in Figure 6, and will not be a shape that approximates a circle. Hereinafter, this will be referred to as Prior Art 1.

Generally, as shown in FIG. 11, the stranded wire conductor 101 has its outer periphery covered with an insulating material 106 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 made up of wires of the same diameter and 19 wires are twisted concentrically, the cross-sectional shape of the stranded conductor 101 will be hexagonal, as shown in FIG. 6, and the thickness of the insulating material 106 will be thin near the apex and thicker from the apex to the sides, resulting in an uneven thickness of the insulating material 106. In addition, to prevent voltage resistance failure, the thickness of the insulating material 106 at the apex becomes the standard, and the thickness of the insulating material 106 at the sides becomes excess and wasted, and from this point of view, it is desirable for the cross-sectional shape of the stranded conductor to be a perfect 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. Furthermore, 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. 12, 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 twisted wire into a nearly perfect circle after compression, the rotation speed of the manufacturing machine (twisting machine) must be kept below a certain value and the rotation speed must be stabilized, which creates the problem of poorer production efficiency than the twisted wire conductor 101 of prior art 1.

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 problems, the present invention provides a plurality of first outer thick diameter wires that are spaced apart in the circumferential direction, and provides a plurality of first outer thick diameter wires between adjacent first outer thick diameter wires in the circumferential direction. Two first outer thin diameter wires that are thinner than the diameter wires are provided spaced apart, and two second outer thick diameter wires that are thicker than the first outer thin diameter wires are spaced between the first outer thin diameter wires. A stranded wire conductor in which one or two second outer thin diameter wires, which are thinner than the second outer thick diameter wires, are provided between the second outer thick diameter wires in the circumferential direction to constitute the outermost layer. ,
An inner thick diameter wire is arranged radially inside the stranded wire conductor in the second outer thin diameter wire, and a plurality of inner thick diameter wires are arranged at intervals in the circumferential direction, and inner thick wires are arranged at intervals in the circumferential direction. Two inner small diameter wires that are thinner than the inner large diameter wire are arranged in the circumferential direction between the large diameter wires,
The inner thin diameter wire is provided inside a valley between the first outer thick diameter wire and the first outer thin diameter wire adjacent in the circumferential direction,
The present invention is characterized in that an inner layer is provided on the radially inner side of the stranded wire conductor in the inner large diameter wire and the inner small diameter wire.

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

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

In addition, the number of the first outer thick wires, the number of the second outer thin wires, the number of the inner thick wires, and the number of the first inner layer wires are set to be the same,
The number of the first outer thin wires, the number of the second outer thick wires, and the number of the first outer thin wires may each be twice the number of the first inner layer wires.

Further, 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 diameter wires, the number of the second outer thick diameter wires, the number of the second outer thin diameter wires, and the number of the first outer thin diameter wires are respectively set in the first inner layer. It may be twice the number of lines.

The distance from the center of the stranded conductor to the outer edge of the first outer thick wire may be the same as the distance from the center of the stranded conductor to the outer edge of the second outer thin wire.

Further, the wire constituting the outermost layer may be compressed and deformed from the outside.

According to the present invention, a plurality of first outer thick wires are arranged at intervals in the circumferential direction, two first outer thin wires are arranged at intervals between adjacent first outer thick wires in the circumferential direction, two second outer thin wires are arranged at intervals between the first outer thin wires, and one or two second outer thin wires are arranged in the circumferential direction between the second outer thick wires to form the outermost layer, an inner thick wire is arranged on the radial inside of the stranded conductor in the second outer thin wire, and a plurality of inner thick wires are arranged at intervals in the circumferential direction, two inner thin wires are arranged in the circumferential direction between adjacent inner thick wires in the circumferential direction, the inner thin wire is arranged inside the valley between the first outer thick wire and the first outer thin wire adjacent in the circumferential direction, and an inner layer is provided on the radial inside of the stranded conductor in the inner thick wire and inner thin wire, so that the cross-sectional shape of the stranded conductor is approximately circular, and the stranded conductor can be made thinner, lighter, and more flexible.

In addition, unlike the stranded conductor 201 of prior art 2, the stranded conductor of the present invention can have an outer shape that is nearly perfectly circular without passing the strands through a compression die. This allows the physical properties of the strands to be maintained without compromising physical properties such as elongation, flexibility, and ductility, and provides highly reliable quality, making it suitable for use in fields such as automotive electric wires and acoustic electric wires.

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. 11 is a cross-sectional view showing another example of a stranded conductor according to the third embodiment of the present invention. FIG. 11 is a cross-sectional view showing another example of a stranded conductor according to the third embodiment 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. 11 is a cross-sectional view showing another example of a stranded conductor according to the fourth embodiment of the present invention. FIG. 11 is a cross-sectional view showing another example of a stranded conductor according to the fourth embodiment of the present invention. FIG. 11 is a cross-sectional view showing another example of a stranded conductor according to the fourth embodiment 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. 13 is a cross-sectional view showing an example of a stranded conductor according to a sixth embodiment of the present invention. FIG. 2 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.

The embodiment of the present invention will be explained with reference to the drawings.

[Example 1]
FIG. 1 is a cross-sectional view of a stranded conductor 1 according to a first embodiment of the present invention, cut in a direction perpendicular to the axial direction. The oblique lines indicating the cross sections of each strand are omitted to avoid complicating the drawing.

The stranded conductor 1 is composed of seven types of wires: 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, and a first inner layer wire 8. Each of the first outer thick wire 2, the second outer thin wire 5, the inner thick wire 6, and the first inner layer wire 8 consists of three wires, and each of the second outer thick wire 3, the first outer thin wire 4, and the inner thin wire 7 consists of six wires, which is twice the number of wires in the first inner layer wire 8.

The wire material that forms the base of each of the strands 2, 3, 4, 5, 6, 7, and 8 can be bare copper wire, oxygen-free copper wire, linear crystal oxygen-free copper wire, single crystal high purity oxygen-free copper wire, or other copper wire plated with tin, nickel, silver, or other such material, or aluminum wire, or various alloy wires, or wires with an insulating coating such as enameled wire, Litz wire, or formal wire. The strands 2, 3, 4, 5, 6, 7, and 8 can be made of the same material or different materials.

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

In the circumferential direction around the center A of the stranded conductor 1, two first thin outer wires 4, 4 are arranged between adjacent first thick outer wires 2, 2 so as to be spaced apart from each other. In the circumferential direction, two second thick outer wires 3, 3 are arranged between the two most adjacent first thin outer wires 4, 4 so as to be spaced apart from each other. In the circumferential direction, one second thin outer wire 5 is arranged between the two most adjacent second thick outer wires 3, 3.

The outermost layer 11 is made up of a total of 18 wires: three first outer thick wires 2, six second outer thick wires 3, six first outer thin wires 4, and three second outer thin wires 5.

One inner thick diameter wire 6 is arranged on the radially inner side of the second outer thin diameter wire 5 about the center A of the stranded wire conductor 1, and the inner thick diameter wires 6 are mutually arranged in the circumferential direction. Three of them are arranged at a distance from each other. Two inner thin diameter wires 7, 7 are arranged so that two inner thin diameter wires 7, 7 are in contact with each other in the circumferential direction between the inner thick diameter wires 6, 6 that are adjacent in the circumferential direction around the center A of the stranded wire conductor 1. has been done.

The inner thin diameter wire 7 constitutes the outermost layer 11 and is located inside a valley portion 16 formed between the first outer thick diameter wire 2 and the first outer thin diameter wire 4 that are adjacent in the circumferential direction. It is arranged so as to be in contact with the adjacent first outer thick diameter wire 2, first outer thin diameter wire 4, and inner thick diameter wire 6.

The three inner thick wires 6 and the six inner thin wires 7 form the first outer layer 12, which is formed inside the outermost layer 11. The outermost layer 11 and the first outer layer 12 form the outer layer 13.

Three first inner layer wires 8 are arranged circumferentially on the radial inside of the stranded conductor 1 in the inner large diameter wire 6 and the inner small diameter wire 7, and the three first inner layer wires 8 form the inner layer 14. The inner layer 14 is formed on the inside of the first outer layer 12. The first inner layer wires 8 are arranged so as to abut the adjacent inner large diameter wire 6 and inner small diameter wire 7.

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

In this embodiment 1, wires 2, 3, 4, 5, 6, 7, and 8 were used, which satisfy the following relationships: d1 = 0.84 x d7, d2 = 0.82 x d7, d3 = 0.69 x d7, d4 = 0.67 x d7, d5 = 1.195 x d7, and d6 = 0.825 x d7.

The cross-sectional shape of the stranded conductor 1 is substantially circular, that is, the distance L1 from the center A of the stranded conductor 1 to the outermost edge B of the first outer thick wire is substantially the same as the distance L2 from the center A of the stranded conductor 1 to the outermost edge C of the second outer thin wire 5.

The stranded conductor 1 of the present invention has the above-mentioned structure, and therefore provides the following functions and effects.

The external shape of the stranded conductor 1 can be made almost perfectly circular without compression, and the strands 2, 3, 4, 5, 6, 7, and 8 can come into contact with almost all of the adjacent strands 2, 3, 4, 5, 6, 7, and 8.

The outer shape of the stranded conductor 1 is nearly circular, and as described above, it can be made thinner than the stranded conductor 101 of prior art 1, so the thickness of the insulating coating can be made thinner and more uniform, reducing the amount of insulating material and reducing costs.

In addition, unlike the stranded conductor 201 of prior art 2, the stranded conductor 1 can have an outer shape that is almost perfectly circular without passing the strands through a compression die, so the physical properties of the stranded wire, such as elongation, flexibility, and ductility, are not lost, and the physical properties of the stranded wire can be maintained, resulting in highly reliable quality, and the conductor can be effectively used in fields such as automotive wires and acoustic wires.

[Example 2]
If the stranded conductor 1 of Example 1 is constructed by using strands 2, 3, 4, 5, 6, 7, 8 and the stranded conductor 1 such that the diameter d1 of the first outer thick wire 2 is greater than the diameters d3 of the first outer thin wire 4 and d4 of the second outer thin wire 5, the diameter d2 of the second outer thick wire 3 is greater than the diameters d3 of the first outer thin wire 4 and d4 of the second outer thin wire 5, and the diameter d5 of the inner thick wire 6 is greater than the diameter d6 of the inner thin wire 7, then the stranded conductor 1 can be constructed by using any strands other than the strands having the diameters described in Example 1. Also, the stranded conductor 1 may be compressed from the outside of the outermost layer 11, which is the layer located on the outermost side of the stranded conductor 1, using a compression die or the like.

By this compression, the outer periphery of the first outer thick wire 2, the second outer thick wire 3, the first outer thin wire 4, and the second outer thin wire 5 constituting the outermost layer 11 is compressed and deformed, and the outer shape of the stranded conductor can be made 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. The compression ratio may be set arbitrarily.

The rest of the structure is the same as in Example 1 above, so the explanation is omitted.

This second embodiment can achieve the same effects as the first embodiment.

[Example 3]
In the above embodiments 1 and 2, the first outer thick diameter wire 2, the second outer thin diameter wire 5, the inner thick diameter wire 6, and the first inner layer wire 8 are each composed of three wires, and the second outer thick diameter wire The wire 3, the first outer thin wire 4, and the inner thin wire 7 were 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 thin wire The numbers of the thin diameter wire 5, the inner thick diameter wire 6, and the first inner layer wire 8 are the same, and the numbers of the second outer thick diameter wire 3, the first outer thin diameter wire 4, and the inner thin wire 7 are set to be the same. The number of first inner layer wires 8 may be twice as long as the number of first inner layer wires 8, and the number of first inner layer wires 8 may be set to any number as long as it is three or more.

Further, one center line 20 is provided on the radially inner side of the twisted wire conductor in 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 constitute 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 arranged with the same regularity as in Examples 1 and 2 above.

For example, as shown in FIG. In the case of the stranded wire conductor 21 in which the first outer thin wire 4 and the inner thin wire 7 are each eight, which is twice the number of the first inner layer wires 8, d1=0.605×d7, Each strand 2 and 3 satisfy the following relationships: d2 = 0.59 x d7, d3 = 0.485 x d7, d4 = 0.47 x d7, d5 = 0.98 x d7, d6 = 0.67 x d7 , 4, 5, 6, 7, and 8, the cross-sectional shape of the stranded wire conductor 21 can be made into a substantially perfect circular shape without compression or with a low compression rate.

For example, as shown in FIG. The number of the first outer thin wires 4 and the inner thin wires 7 is 10, which is twice the number of the first inner layer wires 8, respectively, and the stranded wire conductors in the five first inner layer wires 8 are arranged radially inside. , in the case of a stranded conductor 22 with one centerline 20, the diameter of the centerline 20 is d8, d1=0.48×d7, d2=0.48×d7, d3=0.39× Each strand 2, 3, 4, 5, 6 that holds the following relationships: d7, d4 = 0.37 x d7, d5 = 0.83 x d7, d6 = 0.545 x d7, d8 = 0.70 x d7 , 7, 8, and 20, the cross-sectional shape of the stranded wire conductor 22 can be made into a substantially perfect circular shape without compression or with a low compression rate.

For example, as shown in FIG. 4, in the case of a stranded conductor 23 in which the first outer thick wire 2, the second outer thin wire 5, the inner thick wire 6, and the first inner layer wire 8 each have six wires, the second outer thick wire 3, the first outer thin wire 4, and the inner thin wire 7 each have 12 wires, which is twice the number of the first inner layer wires 8, and one center wire 20 is provided radially inside the stranded conductor in the six first inner layer wires 8, the diameter of the center wire 20 is d8, By using wire material that is the basis of each of the strands 2, 3, 4, 5, 6, 7, 8, and 20, in which the relationships d1 = 0.42 x d7, d2 = 0.42 x d7, d3 = 0.335 x d7, d4 = 0.33 x d7, d5 = 0.765 x d7, d6 = 0.50 x d7, and d8 = d7 are satisfied, the cross-sectional shape of the stranded conductor 23 can be made substantially circular with no compression or a low compression ratio.

The rest of the structure is the same as in Examples 1 and 2 above, so a detailed explanation will be omitted.

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

[Example 4]
In the above-mentioned Examples 1 to 3, one second outer thin wire 5 is disposed between the two second outer thick wires 3, 3 that constitute the outermost layer 11 and are closest to each other in the circumferential direction, but two second outer thin wires 5, 5 may be disposed in the circumferential direction between these two second outer thick wires 3, 3.

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 most adjacent second outer thin diameter wires 5, 5 in the circumferential direction One inner thick-diameter wire 6 is arranged. That is, one inner thick diameter wire 6 is disposed on the radially inner side of the second outer thin diameter wire 5 about the center A of the stranded wire conductor.

Further, an inner thin diameter wire 7 is provided inside the valley portion 16 that constitutes the outermost layer 11 and is formed between the first outer thick diameter wire 2 and the first outer thin diameter wire 4 that are adjacent in the circumferential direction. is installed.

The diameter d1 of the first outer thick 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 diameter d4 of the first outer thin diameter wire 4. The diameter d3 of the outer thin diameter wire 4 is thicker than the diameter d4 of the second outer thin diameter wire 5, the diameter d4 of the second outer thin diameter wire 5 is thicker than the diameter d3 of the first outer thin diameter wire 4, and the inner diameter Each of the strands 2, 3, 4, 5, 6, 7, 8, and 20 can be constructed using wires in which the diameter d5 of the diameter wire 6 is larger than the diameter d6 of the inner narrow diameter wire 7.

For example, as shown in FIG. 5, in the case of a stranded conductor 31 in which the first outer thick wire 2, inner thick wire 6, and first inner layer wire 8 are each three, and the second outer thick wire 3, first outer thin wire 4, second outer thin wire 5, and inner thin wire 7 are each six, which is twice the number of the first inner layer wires 8, by using wire material that is the base of each of the strands 2, 3, 4, 5, 6, 7, and 8 in which the relationships d1 = 0.72 x d7, d2 = 0.72 x d7, d3 = 0.55 x d7, d4 = 0.57 x d7, d5 = 1.195 x d7, and d6 = 0.825 x d7 are satisfied, the cross-sectional shape of the stranded conductor 31 can be made substantially circular with no compression or a low compression ratio.

For example, as shown in FIG. 6, in the case of a stranded conductor 32 in which the first outer thick wire 2, inner thick wire 6, and first inner layer wire 8 are each four, and the second outer thick wire 3, first outer thin wire 4, second outer thin wire 5, and inner thin wire 7 are each eight, which is twice the number of the first inner layer wires 8, by using wire material that is the base of each of the strands 2, 3, 4, 5, 6, 7, and 8, in which the relationships d1 = 0.535 x d7, d2 = 0.535 x d7, d3 = 0.38 x d7, d4 = 0.42 x d7, d5 = 0.98 x d7, and d6 = 0.67 x d7 are satisfied, the cross-sectional shape of the stranded conductor 32 can be made substantially circular with no compression or a low compression ratio.

For example, as shown in FIG. The second outer thin wires 5 and the inner thin wires 7 are each 10 pieces, which is twice the number of the first inner layer wires 8, and are arranged radially inside the stranded wire conductors in the five first inner layer wires 8. , in the case of a stranded conductor 33 with one centerline 20, the diameter of the centerline 20 is d8, d1=0.42×d7, d2=0.425×d7, d3=0.30× Each strand 2, 3, 4, 5, 6 that holds the following relationships: d7, d4 = 0.33 x d7, d5 = 0.83 x d7, d6 = 0.545 x d7, d8 = 0.70 x d7 , 7, 8, and 20, the cross-sectional shape of the stranded wire conductor 33 can be made into a substantially perfect circular shape without compression or with a low compression ratio.

For example, as illustrated in FIG. The second outer thin-diameter wire 5 and the inner thin-diameter wire 7 are each 12, which is twice the number of the first inner layer wires 8, and are arranged radially inside the stranded wire conductors in the six first inner layer wires 8. , in the case of a stranded conductor 34 with one centerline 20, the diameter of the centerline 20 is d8, d1=0.36×d7, d2=0.34×d7, d3=0.27× Each strand 2, 3, 4, 5, 6, 7, 8 that holds the following relationships: d7, d4 = 0.275 x d7, d5 = 0.765 x d7, d6 = 0.50 x d7, d8 = d7 , 20, the cross-sectional shape of the stranded wire conductor 34 can be made into a substantially perfect circular shape without compression or with a low compression rate.

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

This embodiment 4 also has the same effects as the above embodiments 1 to 3.

[Example 5]
In the fourth embodiment, the diameter d4 of the second outer thin wire 5 was made larger than the diameter d3 of the first outer thin wire 4, but the diameter d3 of the first outer thin wire 4 was It may be formed to be thicker than the diameter d4 of the thin wire 5.

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

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

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

[Example 6]
In the above embodiments 1 to 5, the inner layer 14, 24 is composed of the first inner layer wire 8, or the first inner layer wire 8 and the center wire 20. However, instead of the center wire 20, a plurality of wires or carbon fibers having any diameter may be arranged.

For example, as shown in FIG. The first outer thin diameter wire 4 and the inner thin diameter wire 7 are each 12, which is twice the number of the first inner layer wires 8, and the two second outer thick diameter wires 3 constituting the outermost layer 11, 3, one second outer thin wire 5 is disposed between them to constitute an outer layer 13 similar to the outer layer 13 of the stranded wire conductor 23 shown in FIG. Six second inner layer wires 42 are arranged in the circumferential direction to form a first inner layer 41, and six second inner layer wires 42 are arranged in the circumferential direction inside the first inner layer 41 to form a second inner layer 43. A stranded conductor 51 may be provided in which the center line 44 is disposed inside the strand 43 and the inner layer 50 is configured.

The rest of the structure is the same as in Examples 1 to 5 above, so a detailed explanation will be omitted.

This embodiment 6 can also achieve the same effects as the above embodiments 1 to 5.

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

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 . 11 , 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.

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.

In order to solve the above-mentioned problems, the present invention provides a plurality of first outer thick diameter wires that are spaced apart in the circumferential direction, and provides a plurality of first outer thick diameter wires between adjacent first outer thick diameter wires in the circumferential direction. Two first outer thin diameter wires that are thinner than the diameter wires are provided spaced apart, and two second outer thick diameter wires that are thicker than the first outer thin diameter wires are spaced between the first outer thin diameter wires. A stranded wire conductor in which one or two second outer thin diameter wires, which are thinner than the second outer thick diameter wires, are provided between the second outer thick diameter wires in the circumferential direction to constitute the outermost layer. ,
An inner thick diameter wire is arranged radially inside the stranded wire conductor in the second outer thin diameter wire, and a plurality of inner thick diameter wires are arranged at intervals in the circumferential direction, and inner thick wires are arranged at intervals in the circumferential direction. Two inner small diameter wires that are thinner than the inner large diameter wire are arranged in the circumferential direction between the large diameter wires,
The inner thin diameter wire is provided inside a valley between the first outer thick diameter wire and the first outer thin diameter wire adjacent in the circumferential direction,
An inner layer is provided on the radially inner side of the stranded wire conductor in the inner large diameter wire and the inner small diameter 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 diameter wire. This is a characteristic feature.

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

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

Three first inner layer wires 8 are disposed in the circumferential direction on the radially inner side of the stranded wire conductor 1 between the inner thick diameter wire 6 and the inner thin diameter wire 7, and the three first inner layer wires 8 form the inner layer 14. It consists of 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 adjacent inner thick diameter wire 6 and inner thin diameter wire 7.

Claims (7)

A plurality of first outer thick diameter wires are provided spaced apart in the circumferential direction, and two first outer thin diameter wires that are thinner than the first outer thick diameter wires are provided between the circumferentially adjacent first outer thick diameter wires. are provided spaced apart from each other, and between the first outer thin diameter wires are provided two second outer thick diameter wires that are thicker than the first outer thin diameter wires, and between the second outer thick diameter wires, A stranded wire conductor in which the outermost layer is formed by providing one or two second outer small diameter wires in the circumferential direction, which are thinner than the second outer large diameter wire,
An inner thick diameter wire is arranged radially inside the stranded wire conductor in the second outer thin diameter wire, and a plurality of inner thick diameter wires are arranged at intervals in the circumferential direction, and inner thick wires are arranged at intervals in the circumferential direction. Two inner small diameter wires that are thinner than the inner large diameter wire are arranged in the circumferential direction between the large diameter wires,
The inner thin diameter wire is provided inside a valley between the first outer thick diameter wire and the first outer thin diameter wire adjacent in the circumferential direction,
A stranded wire conductor characterized in that an inner layer is provided on the radially inner side of the stranded wire conductor in the inner large diameter wire and the inner small diameter wire. The stranded wire conductor according to claim 1, wherein the inner layer is composed of three or more first inner layer wires arranged in the circumferential direction. Claim 1, wherein the inner layer includes three or more first inner layer wires arranged in the circumferential direction, and one center line on the radially inner side of the stranded conductor in the first inner layer wire. The stranded conductor 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 diameter wires, the number of the second outer thick diameter wires, and the number of the first outer thin diameter wires are each twice the number of the first inner layer wires. The stranded wire 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 diameter wires, the number of the second outer thick diameter wires, the number of the second outer thin diameter wires, and the number of the first outer thin diameter wires are respectively set in the first inner layer. The stranded wire conductor according to claim 2 or 3, characterized in that the number of stranded wires is twice the number of wires. The stranded conductor according to any one of claims 1 to 3, characterized in that the distance from the center of the stranded conductor to the outer edge of the first outer thick wire is the same as the distance from the center of the stranded conductor to the outer edge of the second outer thin wire. The stranded wire conductor according to any one of claims 1 to 3, wherein the strands constituting the outermost layer are compressively deformed from the outside.

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