JP2022180842A - Twisted wire conductor - Google Patents

Abstract

To provide a twisted wire conductor capable of producing a sectional shape of the twisted wire conductor into a shape near to a complete round shape without pressurizing or with a low pressure.SOLUTION: A twisted wire conductor 1 has an inner layer 2 constituted by disposing three or more and five or less of first inner layer wires 11 in a circumferential direction at a center part. There is disposed a first outer layer 3 constituted by first thin diameter wires 12 having same number of the first inner layer wires 11, and first thick diameter wires 13 having same number of the first inner layer wires 11 and having a diameter thicker than the diameter of the first thin diameter wires 12 outside of the inner layer 2. There is disposed the first thick diameter wires 13 outside of valley parts 15 formed between the first inner layer wires 11, 11 abutting in a circumferential direction. There is disposed one first thin diameter wire 12 between the first thick diameter wires 13, 13 abutting in a circumferential direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to stranded conductors.

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

For example, a stranded conductor that is concentrically stranded and composed of 19 strands generally has a single strand 102 at the center of the stranded conductor 101 as a nucleus, as shown in FIG. , 6 strands 103 surround it to form an inner layer, and further, 12 strands 104 surround its periphery to form an outer layer, which are then twisted in the same direction. ing.

Since the strands 102, 103, and 104 all have a circular cross section and the same diameter, when the strands 102, 103, and 104 are arranged in the standard core arrangement to form the stranded conductor 101, the outer peripheral shape , as shown in FIG. 10, has a shape approximating a hexagon, and does not have a shape approximating a round shape. Hereinafter, this is referred to as prior art 1.

In general, as shown in FIG. 10, the stranded conductor 101 is used as an electric wire (coated wire) or the like 107 with an insulating material 106 covering the outer periphery thereof. Reducing the weight of the insulating material 106 is important from the viewpoint of effective utilization of resources, and for this reason, it is desired that the cross-sectional shape of the stranded conductor be a perfect circle.

However, if the stranded conductor is configured with strands of the same diameter in a concentric twist arrangement, for example, as shown in FIG. The thickness of the insulating material 106 is thin in the vicinity of the apex and becomes thicker from the apex to the side, making the thickness of the insulating material 106 non-uniform. Moreover, in order to prevent a breakdown voltage defect, it is preferable that the outer peripheral portion of the stranded conductor 101 is coated substantially uniformly. From this point of view as well, it is desirable that the cross-sectional shape of the stranded conductor be a perfect circle.

In addition, when 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 in terminal processing of the coated wire or the like.

Also, in collective twisted wires other than the concentric twist arrangement, it is desired that the cross-sectional shape of the stranded conductor is a perfect circle as well.

As a method of making the cross-sectional shape of the stranded conductor a perfect circle, for example, as described in Patent Document 1, strands 202 having a circular cross-section and all having the same diameter are twisted in one direction and passed through a compression die. , as shown in FIG. 11, a method has been proposed in which the cross-sectional shape of the stranded conductor 201 is made substantially circular. Hereinafter, this is referred to as prior art 2.

JP-A-11-25758

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

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

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

Therefore, according to the present invention, the cross-sectional shape of the stranded conductor can be made closer to a perfect circle by compressing the strands without compression or by compressing the strands at a compression rate lower than that of the prior art 2. It is an object of the present invention to provide a stranded conductor that can be

In order to solve the above-mentioned problems, the invention according to claim 1 is a stranded conductor having an inner layer in which three or more and five or less first inner layer wires are arranged in a central portion in a circumferential direction. ,
Outside the inner layer, the same number of first thin wires as the number of the first inner layer wires and a first thick wire having the same number as the first inner layer wires and a diameter larger than the diameter of the first thin wires Disposing a first outer layer composed of radial wires,
The first large-diameter wire is disposed outside the valley formed between the first inner layer wires adjacent in the circumferential direction, and one first thin wire is provided between the first large-diameter wires adjacent in the circumferential direction. is provided.

According to a second aspect of the present invention, there is provided a stranded conductor having an inner layer in which 3 or more and 5 or less first inner layer wires are arranged in a central portion in a circumferential direction,
Outside the inner layer, the same number of first thin wires as the number of the first inner layer wires and a first thick wire having the same number as the first inner layer wires and a diameter larger than the diameter of the first thin wires Disposing a first outer layer composed of radial wires,
The first large-diameter wire is disposed outside the valley formed between the first inner layer wires adjacent in the circumferential direction, and one first thin wire is provided between the first large-diameter wires adjacent in the circumferential direction. and
Outside the first outer layer, the same number of second thin wires as the number of the first inner layer wires and the number of second thin wires twice the number of the first inner layer wires and having a diameter larger than the diameter of the second thin wire Disposing a second outer layer composed of a second thick wire,
The center of the second thin wire is positioned on the line connecting the center of the stranded conductor and the first thick wire, and two wires are arranged between the second thin wires adjacent in the circumferential direction. A second thick wire is arranged in the circumferential direction,
It is characterized in that a second large-diameter wire is arranged outside a valley portion formed between the first small-diameter wire and the first large-diameter wire.

According to a third aspect of the invention, there is provided a stranded conductor having an inner layer in which three or more and five or less first inner layer wires are arranged in a central portion in a circumferential direction,
Outside the inner layer, the same number of first thin wires as the number of the first inner layer wires and a first thick wire having the same number as the first inner layer wires and a diameter larger than the diameter of the first thin wires Disposing a first outer layer composed of radial wires,
The first large-diameter wire is disposed outside the valley formed between the first inner layer wires adjacent in the circumferential direction, and one first thin wire is provided between the first large-diameter wires adjacent in the circumferential direction. and
Outside the first outer layer, the same number of second thin wires as the number of the first inner layer wires and the number of second thin wires twice the number of the first inner layer wires and having a diameter larger than the diameter of the second thin wire Disposing a second outer layer composed of a second thick wire,
The center of the second thin wire is positioned on the line connecting the center of the stranded conductor and the first thick wire, and two wires are arranged between the second thin wires adjacent in the circumferential direction. A second thick wire is arranged in the circumferential direction,
disposing a second large-diameter wire outside a valley formed between the first small-diameter wire and the first large-diameter wire,
Outside the second outer layer, the same number of third thin wires as the number of the first inner layer wires and a number of the third thin wires twice the number of the first inner layer wires and thicker than the diameter of the third thin wires disposing a third outer layer composed of a third medium-diameter wire and a third thick-diameter wire in the same number as the first inner-layer wire and having a diameter larger than that of the third medium-diameter wire;
The third large-diameter wire is disposed outside the valley formed between the second large-diameter wires adjacent in the circumferential direction, and two third intermediate wires are provided between the third large-diameter wires adjacent in the circumferential direction. It is characterized in that the diameter wires are spaced apart, and one third small diameter wire is arranged between the third medium diameter wires that are adjacent in the circumferential direction.

The invention according to claim 4 is based on the invention according to any one of claims 1 to 3, and the thickest of the strands constituting the outermost layer in the radial direction from the center of the stranded conductor the distance to the outer edge of the wire, and
It is characterized in that the distance from the center of the stranded conductor to the outer edge of the thinnest strand among the strands forming the outermost layer in the radial direction is the same.

The invention according to claim 5 is the invention according to any one of claims 1 to 4, characterized in that the wires forming the outermost layer in the radial direction are compressed and deformed from the outside. and

According to the present invention, the inner layer is configured by arranging three to five first inner layer wires in the central portion in the circumferential direction, and the valleys are formed between the first inner layer wires that are adjacent in the circumferential direction. By arranging the first large-diameter wires on the outer side of the part and arranging one first small-diameter wire between the first large-diameter wires adjacent in the circumferential direction to constitute the first outer layer, the twisted The cross-sectional shape of the wire conductor is substantially a perfect circle, and it is possible to reduce the diameter, reduce the weight, and improve the flexibility of the stranded wire conductor.

Also, the center of the second thin wire is positioned on the line connecting the center of the stranded conductor and the first thick wire, and two wires are arranged between the second thin wires adjacent in the circumferential direction. A second large-diameter wire is arranged in the circumferential direction, and the second large-diameter wire is arranged outside a valley portion formed between the first small-diameter wire and the first large-diameter wire. By configuring the second outer layer outside the first outer layer, the cross-sectional shape of the stranded conductor can be made substantially circular.

Further, a third thick wire is disposed outside a valley portion formed between the second thick wires adjacent in the circumferential direction, and two third thick wires are disposed between the third thick wires adjacent in the circumferential direction. A third outer layer is formed by disposing medium-diameter wires at intervals and disposing one third fine-diameter wire between the third medium-diameter wires that are adjacent in the circumferential direction, on the outside of the second outer layer. Also by configuring, the cross-sectional shape of the stranded conductor can be made substantially circular.

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

1 is a cross-sectional view of a stranded conductor according to Example 1 of the present invention; FIG. FIG. 4 is a cross-sectional view showing an example of a stranded conductor according to Example 3 of the present invention; FIG. 11 is a cross-sectional view showing another example of the stranded conductor according to Example 3 of the present invention; FIG. 4 is a cross-sectional view of a stranded conductor according to Example 4 of the present invention; FIG. 11 is a cross-sectional view showing an example of a stranded conductor according to Example 5 of the present invention; FIG. 11 is a cross-sectional view showing another example of the stranded conductor according to Example 5 of the present invention; FIG. 10 is a cross-sectional view of a stranded conductor according to Example 6 of the present invention; The cross-sectional view which shows an example of the twisted wire conductor which concerns on Example 7 of this invention. FIG. 12 is a cross-sectional view showing another example of the stranded conductor according to Example 7 of the present invention; FIG. 2 is a cross-sectional view of a stranded conductor according to prior art 1; FIG. 10 is a cross-sectional view of a stranded conductor according to prior art 2;

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

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

The stranded conductor 1 has an inner layer 2 and a first outer layer 3 provided outside the inner layer 2 . The first outer layer 3 constitutes an outer layer 6 . The inner layer 2 is configured by arranging three first inner layer wires (element wires) 11 in the circumferential direction.

As shown in FIG. 1, the first outer layer 3 includes three first thin wires (strands) 12 and three first thick wires (strands) 13, a total of six strands 12, At 13 , it is configured to cover and surround the inner layer 2 . The first inner layer wire 11, the first thin wire 12, and the first thick wire 13 are each composed of the same number of three wires.

The first large-diameter wire 13 constitutes the inner layer 2 and abuts against the first inner layer wire 11 outside a valley portion 15 formed between the first inner layer wires 11, 11 adjacent in the circumferential direction. The first thick wires 13 and 13 that are adjacent in the circumferential direction are spaced apart from each other.

One first small-diameter wire 12 is provided between first large-diameter wires 13 adjacent in the circumferential direction, and the first small-diameter wires 12 adjacent in the circumferential direction are spaced apart from each other. are arranged.

In this embodiment, no wires are arranged inside the inner layer 2, but one or more wires may be arranged inside the inner layer 2. Configuration and the like can be set arbitrarily.

The wires 11, 12, and 13 are based on copper wires such as bare copper wires, oxygen-free copper wires, linear crystal oxygen-free copper wires, and single-crystal high-purity oxygen-free copper wires. , tin, nickel, silver or the like plated, aluminum wire, various alloy wires, enameled wire, litz wire, formal wire or the like coated with insulation. The materials of the wires 11, 12 and 13 may be the same or different.

The diameter d1 of the first inner layer wire 11 is smaller than the diameter d2 of the first thin wire 12, and the diameter d2 of the first thin wire 12 is smaller than the diameter d3 of the first thick wire 13.

In Example 1, the wires 11, 12, and 13 that satisfy the relationships d2=1.595×d1 and d3=1.97×d1 are used.

In addition, the cross-sectional shape of the stranded conductor 1 is substantially a perfect circle, that is, from the center A of the stranded conductor 1, the most out of the strands constituting the first outer layer 3, which is the outermost layer in the radial direction. The distance L1 from the first large-diameter wire 13, which is a thick wire, to the outermost edge B, and the thinnest wire constituting the first outer layer 3, which is the outermost layer in the radial direction from the center A. The distance L2 to the outermost edge C of the first small-diameter wire 12, which is a wire, is formed to be the same.

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

The cross-sectional shape of the stranded conductor 1 is substantially circular, and each strand 11, 12, 13 can abut against all the adjacent strands 11, 12, 13, so that the twisted form is stabilized. At the same time, the conductor density of the stranded conductor 1 can be increased, and the diameter and weight of the stranded conductor 1 can be reduced, and the flexibility can be improved.

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

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

[Example 2]
In Example 1 above, if the stranded conductor 1 is configured using the strands 11, 12, and 13 in which the diameter d2 of the first small-diameter wire 12 is smaller than the diameter d3 of the first large-diameter wire 13, the above-described implementation can be achieved. The stranded conductor 1 can be constructed using arbitrary strands other than the strands having the diameter described in Example 1. Alternatively, the outer peripheral portion of the first outer layer 3 may be compressed using a compression die or the like.

By this compression, the outer peripheral portions of the strands 12 and 13 forming the first outer layer 3 located on the outermost side in the radial direction are compressed and deformed, and the outer shape of the stranded conductor can be brought closer to a perfect circle. Compression using a compression die or the like may be performed when the stranded conductor 1 is manufactured, or may be performed after the stranded conductor 1 is manufactured. Note that the compression rate is set arbitrarily.

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

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

[Example 3]
In Examples 1 and 2, the numbers of the first inner layer wires 11, the first thin wires 12, and the first thick wires 13 are three, respectively. The number of each of the thin wires 12 and the first thick wires 13 is the same as the number of the first inner layer wires 11 forming the inner layer 2, and the number of the first inner layer wires 11 is 3 or more and 5 or less. If there is, each can be set to an arbitrary number.

In the third embodiment, similarly to the first embodiment, the first large-diameter wire 13 constitutes the inner layer 2 and is formed between the first inner layer wires 11, 11 adjacent in the circumferential direction. Arranged outside the valley portion 15, one first thin wire 12 is disposed between first thick wires 13 adjacent in the circumferential direction.

For example, as shown in FIG. 2, a stranded conductor having four first inner layer wires 11 in the inner layer 2A and four first small diameter wires 12 and four first large diameter wires 13 constituting the first outer layer 3A. In the case of 17, non-compressible or low-compressible wire rods are used for the wires 11, 12, and 13 that satisfy the relationships of d2=1.155×d1 and d3=1.47×d1. At this rate, the cross-sectional shape of the stranded conductor 17 can be made substantially circular, and each strand 11, 12, 13 can be in contact with all the strands 11, 12, 13 adjacent to each other.

For example, as shown in FIG. 3, a stranded conductor having five first inner layer wires 11 in the inner layer 2B and five first small diameter wires 12 and five first large diameter wires 13 constituting the first outer layer 3B. In the case of 18, by using the wire material that is the base of each of the wires 11, 12, and 13, where the relationships of d2 = 0.95 x d1 and d3 = 1.23 x d1 are established, no compression or low compression At this rate, the cross-sectional shape of the stranded conductor 17 can be made substantially circular, and each strand 11, 12, 13 can be in contact with all the strands 11, 12, 13 adjacent to each other.

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

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

[Example 4]
As shown in FIG. 4, the stranded conductor 21 of the fourth embodiment has the second outer layer 4 provided outside the first outer layer 3, and the two layers of the first outer layer 3 and the second outer layer 4 constitute the outer layer 22. . The inner layer 2 and the first outer layer 3 of the fourth embodiment are constructed in the same manner as the inner layer 2 and the first outer layer 3 of the first and second embodiments.

As shown in FIG. 4, the second outer layer 4 includes three second small-diameter wires (strands) 23 and six second thick-diameter wires (strands) 24, a total of nine strands 23, At 24 it is configured to surround the first outer layer 3 . The number of second thin wires 23 is the same as the number of first inner layer wires 11 , and the number of second thick wires 24 is twice the number of first inner layer wires 11 .

The center of the second small-diameter wire 23 is positioned on the line connecting the center of the stranded conductor 21 and the first large-diameter wire 13, preferably the center of the stranded conductor 21 and the first large-diameter wire 13. The second thin wires 23 which are arranged on a line connecting the centers of the wires 13 and which are adjacent in the circumferential direction are spaced apart from each other.

Two second large-diameter wires 24 are arranged in the circumferential direction between two second small-diameter wires 23 adjacent in the circumferential direction, constitute the first outer layer 3, and extend in the circumferential direction. It is disposed outside a valley portion 25 formed between adjacent first small-diameter wire 12 and first large-diameter wire 13 so as to abut on first small-diameter wire 12 and first large-diameter wire 13 . ing.

The diameter d4 of the second thin wire 23 is set smaller than the diameter d5 of the second thick wire 24. As shown in FIG.

In the present embodiment 4, each of the strands 11, 12, 13 where the relationships of d2 = 1.45 x d1, d3 = 2.16 x d1, d4 = 2.21 x d1, and d5 = 2.80 x d1 are established. , 23, 24, the cross-sectional shape of the stranded conductor 21 is made substantially circular, and all the wires 11, 12, 13, 13, 24 adjacent to each of the wires 11, 12, 13, 23, 24 23, 24 can be abutted.

In addition, the cross-sectional shape of the stranded conductor 21 is substantially a perfect circle, that is, from the center A1 of the stranded conductor 21, the strands constituting the second outer layer 4, which is the outermost layer in the radial direction, are the most A distance L11 from the second thick wire 24, which is a thick wire, to the outermost edge B1, and the thinnest wire constituting the second outer layer 4, which is the outermost layer in the radial direction from the center A1. The distance L21 to the outermost edge C1 of the second small-diameter wire 23, which is a wire, is formed to be the same.

The diameter d2 of the first small-diameter wire 12 is smaller than the diameter d3 of the first large-diameter wire 13, and the diameter d4 of the second small-diameter wire 23 is smaller than the diameter d5 of the second large-diameter wire 24. If the stranded conductor 21 is constructed using 11, 12, 13, 23, and 24, any strand other than the strands having the diameters described in Examples 1, 2, and 4 can be used to form the stranded conductor. 21 can be configured.

In this embodiment, no strands of wire are arranged inside the inner layer 2, but one or a plurality of strands of wire may be arranged inside the inner layer 2. Configuration and the like can be set arbitrarily.

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

Also in the fourth embodiment, the same effect as the first and second embodiments can be exhibited.

[Example 5]
In the fourth embodiment, as shown in FIG. 4, the numbers of the first inner layer wire 11, the first thin wire 12, the first thick wire 13, and the second thin wire 23 are each three. , the number of the second large-diameter wires 24 is six, but the number of the first small-diameter wires 12 and the first large-diameter wires 13 constituting the first outer layer 3 and the number of the first large-diameter wires 13 constituting the second outer layer 4 The number of the second thin wires 23 is the same as the number of the first inner layer wires 11 forming the inner layer 2, and the number of the second thick wires 24 forming the second outer layer 4 is equal to the number of the second thick wires 24 forming the inner layer 2. If the number of first inner layer wires 11 is twice the number of one inner layer wire 11 and the number of first inner layer wires 11 is 3 or more and 5 or less, each number can be set arbitrarily.

In the fifth embodiment, similarly to the fourth embodiment, the first large-diameter wire 13 constitutes the inner layer 2 and is formed between the first inner layer wires 11, 11 adjacent in the circumferential direction. Arranged outside the valley portion 15, one first thin wire 12 is disposed between first thick wires 13 adjacent in the circumferential direction.

Also in the fifth embodiment, as in the fourth embodiment, the center of the second small-diameter wire 23 is positioned on the line connecting the center of the stranded conductor 21 and the first large-diameter wire 13. Preferably, they are arranged on a line connecting the center of the stranded conductor 21 and the center of the first large-diameter wire 13 . Two second large-diameter wires 24 are arranged in the circumferential direction between the second small-diameter wires 23 adjacent in the circumferential direction, constitute the first outer layer 3, and It is disposed outside the valley portion 25 formed between the first thin wire 12 and the first thick wire 13 that are adjacent to each other in the direction.

For example, as shown in FIG. 5, a second outer layer 4A is provided outside the first outer layer 3A, four first inner layer wires 11 are provided in the inner layer 2A, and a first thin wire 12 and a second In the case of a stranded conductor 27 having four large-diameter wires 13, four second small-diameter wires 23 constituting the second outer layer 4A, and eight second large-diameter wires 24 constituting the second outer layer 4A, d2 = 1.02 x d1, d3 = 1.56 x d1, d4 = 1.29 x d1, and d5 = 1.69 x d1. By using the wire material that is the basis of, the cross-sectional shape of the stranded wire conductor 27 is made into a substantially perfect circular shape without compression or with a low compression ratio, and all the wires 11, 12, 13, 23, and 24 are adjacent to each other. can be in contact with the wires 11, 12, 13, 23, 24.

For example, as shown in FIG. 6, a second outer layer 4B is provided outside the first outer layer 3B, five first inner layer wires 11 are provided in the inner layer 2B, and the first thin wire 12 and the first thin wire 12 constituting the first outer layer 3B In the case of a stranded conductor 28 having five large-diameter wires 13, five second small-diameter wires 23 constituting the second outer layer 4B, and ten second large-diameter wires 24 constituting the second outer layer 4B, d2 = 0.855 x d1, d3 = 1.33 x d1, d4 = 0.94 x d1, and d5 = 1.275 x d1. By using the wire material that is the basis of, the cross-sectional shape of the stranded wire conductor 28 is made into a substantially perfect circular shape without compression or with a low compression rate, and all the adjacent wires 11, 12, 13, 23, and 24 can be in contact with the wires 11, 12, 13, 23, 24.

Other structures are the same as those of Examples 1 to 4, so description thereof is omitted.

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

[Example 6]
As shown in FIG. 7, the stranded conductor 31 of Example 6 has a third outer layer 5 outside the second outer layer 4, and is composed of three layers, the first outer layer 3, the second outer layer 4, and the third outer layer 5. It constitutes the outer layer 32 . The inner layer 2, the first outer layer 3 and the second outer layer 4 of the sixth embodiment are constructed in the same manner as the inner layer 2, the first outer layer 3 and the second outer layer 4 of the first, second and fourth embodiments.

As shown in FIG. 7, the third outer layer 5 includes three third small-diameter wires (strands) 33, six third medium-diameter wires (strands) 34, and three third large-diameter wires (strands). A total of 12 strands 33 , 34 , 35 of wires (strands) 35 are configured to surround the second outer layer 4 . The number of the third small-diameter wires 33 is the same as the number of the first inner layer wires 11, and the number of the third medium-diameter wires 34 is twice the number of the first inner layer wires 11, and the number of the third thick-diameter wires 35 is The number of wires is the same as the number of first inner layer wires 11 .

The diameter d6 of the third small-diameter wire 33 is smaller than the diameter d7 of the third medium-diameter wire 34, and the diameter d7 of the third medium-diameter wire 34 is set smaller than the diameter d8 of the third large-diameter wire 35.

The third large-diameter wire 35 constitutes the second outer layer 4 and is formed outside the valley portion 36 formed between the second large-diameter wires 24 and the second large-diameter wires 24 adjacent in the circumferential direction. Third large-diameter wires 35 that are arranged to abut on the second large-diameter wire 24 and that are adjacent in the circumferential direction are spaced apart from each other.

The third medium-diameter wires 34 are arranged between the third thick-diameter wires 35 that constitute the third outer layer 5 and are circumferentially adjacent to each other so as to be spaced apart from each other in the circumferential direction. Book is arranged.

The third small-diameter wire 33 constitutes the third outer layer 5 and is disposed between the third medium-diameter wires 34 adjacent in the circumferential direction. The matching third thin wires 33 are spaced apart from each other.

In the sixth embodiment, d2=1.45×d1, d3=2.16×d1, d4=2.21×d1, d5=2.80×d1, d6=3.21×d1, d7=3. By using the wires 11, 12, 13, 23, 24, 33, 34, and 35 satisfying the relationship of 30×d1 and d8=3.80×d1, the cross-sectional shape of the stranded conductor 31 can be made substantially circular. In addition to the shape, each strand 11, 12, 13, 23, 24, 33, 34, 35 can contact with all adjacent strands 11, 12, 13, 23, 24, 33, 34, 35. can.

In addition, the cross-sectional shape of the stranded conductor 31 is substantially a perfect circle, that is, from the center A2 of the stranded conductor 31, the outermost strand of the strands constituting the third outer layer 5, which is the outermost layer in the radial direction. A distance L21 from the third thick wire 35, which is a thick wire, to the outermost edge B2, and the thinnest wire constituting the third outer layer 5, which is the outermost layer in the radial direction from the center A2. The distance L22 to the outermost edge C2 of the third small-diameter wire 33, which is a wire, is formed to be the same.

The diameter d2 of the first thin wire 12 is smaller than the diameter d3 of the first thick wire 13, the diameter d4 of the second thin wire 23 is smaller than the diameter d5 of the second thick wire 24, and the diameter d4 of the second thick wire 24 is smaller than the diameter d5 of the second thick wire 24. The diameter d6 of the small wire 33 is smaller than the diameter d7 of the third medium wire 34, and the diameter d7 of the third medium wire 34 is smaller than the diameter d8 of the third large wire 35. 13, 23, 24, 33, 34, and 35, any strands other than the strands having the diameters described in Examples 1, 2, 4, and 6 can be used. The stranded conductor 31 can be configured by

In this embodiment, no strands of wire are arranged inside the inner layer 2, but one or a plurality of strands of wire may be arranged inside the inner layer 2. Configuration and the like can be set arbitrarily.

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

Also in this sixth embodiment, the same effects as in the first, second, and fourth embodiments can be exhibited.

[Example 7]
In the sixth embodiment, the first inner layer wire 11, the first small diameter wire 12, the first large diameter wire 13, the second small diameter wire 23, the third small diameter wire 33, and the third large diameter wire The number of the wires 35 is three, and the number of the second large-diameter wire 24 and the third medium-diameter wire 34 is six. The number of each of the wires 13 and the number of the second thin wires 23 forming the second outer layer 4 are calculated, and the number of the third thin wires 33 and the number of the third thick wires 35 forming the third outer layer 5 are calculated. , the number of the first inner layer wires 11 forming the inner layer 2, the number of the second thick wires 24 forming the second outer layer 4, and the number of the third medium-diameter wires 34 forming the third outer layer 5. If the number of the first inner layer wires 11 is twice the number of the first inner layer wires 11 constituting the inner layer 2 and the number of the first inner layer wires 11 is 3 or more and 5 or less, the number of the first inner layer wires 11 can be set to an arbitrary number. .

In the seventh embodiment, similarly to the sixth embodiment, the first large-diameter wire 13 constitutes the inner layer 2 and is formed between the first inner layer wires 11, 11 adjacent in the circumferential direction. Arranged outside the valley portion 15, one first thin wire 12 is disposed between first thick wires 13 adjacent in the circumferential direction.

Also in the seventh embodiment, as in the sixth embodiment, the center of the second thin wire 23 is arranged on the line connecting the center of the stranded conductor 21 and the first thick wire 13. Preferably, they are arranged on a line connecting the center of the stranded conductor 21 and the center of the first large-diameter wire 13 . Two second large-diameter wires 24 are arranged in the circumferential direction between the second small-diameter wires 23 adjacent in the circumferential direction, constitute the first outer layer 3, and It is disposed outside the valley portion 25 formed between the first thin wire 12 and the first thick wire 13 that are adjacent to each other in the direction.

Also in the seventh embodiment, similarly to the sixth embodiment, the third thick wire 35 constitutes the second outer layer 4 and is adjacent to the second thick wire 24 in the circumferential direction. It is arranged outside the valley portion 36 formed between the radial line 24 . The third medium-diameter wires 34 are arranged between the third thick-diameter wires 35 that constitute the third outer layer 5 and are circumferentially adjacent to each other so as to be spaced apart from each other in the circumferential direction. Book is arranged. One third small-diameter wire 33 constitutes the third outer layer 5 and is disposed between the third medium-diameter wires 34 adjacent to each other in the circumferential direction.

For example, as shown in FIG. 8, a third outer layer 5A is provided outside the second outer layer 4A, four first inner layer wires 11 are provided in the inner layer 2A, and the first thin wire 12 and the first thin wire 12 which constitute the first outer layer 3A The first thick wire 13, the second thin wire 23 forming the second outer layer 4A, and the third thin wire 33 and the third thick wire 35 forming the third outer layer 5A are each four in number. In the case of the stranded conductor 37 in which the number of the second large-diameter wires 24 constituting the second outer layer 4A and the number of the third medium-diameter wires 34 constituting the third outer layer 5A are eight each, d2=1.02× d1, d3 = 1.56 x d1, d4 = 1.29 x d1, d5 = 1.69 x d1, d6 = 1.66 x d1, d7 = 1.69 x d1, d8 = 1.99 x d1 By using the wire material that is the basis of each of the wires 11, 12, 13, 23, 24, 33, 34, and 35 in which the relationship is established, the cross-sectional shape of the stranded conductor 37 can be substantially true without compression or with a low compression rate. While being circular, all the strands 11, 12, 13, 23, 24, 33, 34, 35 are in contact with all adjacent strands 11, 12, 13, 23, 24, 33, 34, 35 be able to.

For example, as shown in FIG. 9, a third outer layer 5B is provided outside the second outer layer 4B, five first inner layer wires 11 are provided in the inner layer 2B, and the first small diameter wire 12 and the first thin wire 12 constituting the first outer layer 3B The first thick wire 13, the second thin wire 23 forming the second outer layer 4B, and the third thin wire 33 and the third thick wire 35 forming the third outer layer 5B are each five in number. In the case of the stranded conductor 38 in which the number of the second large-diameter wires 24 constituting the second outer layer 4B and the number of the third medium-diameter wires 34 constituting the third outer layer 5B are ten each, d2=0.855× d1, d3 = 1.33 x d1, d4 = 0.94 x d1, d5 = 1.275 x d1, d6 = 1.13 x d1, d7 = 1.18 x d1, d8 = 1.37 x d1 By using the wire material that is the basis of each of the wires 11, 12, 13, 23, 24, 33, 34, and 35 in which the relationship is established, the cross-sectional shape of the stranded conductor 37 can be substantially true without compression or with a low compression rate. While being circular, all the strands 11, 12, 13, 23, 24, 33, 34, 35 are in contact with all adjacent strands 11, 12, 13, 23, 24, 33, 34, 35 be able to.

Other structures are the same as those of Examples 1 to 6, and thus description thereof is omitted.

Also in the present embodiment 7, it is possible to exhibit the same effects as those of the above embodiments 1-6.

1, 17, 18, 21, 27, 28, 31, 37, 38 stranded conductor 2, 2A, 2B inner layer 3, 3A, 3B first outer layer 4, 4A, 4B second outer layer 5, 5A, 5B third outer layer 11 first inner layer wire 12 first small diameter wire 13 first large diameter wire 23 second small diameter wire 24 second large diameter wire 33 third small diameter wire 34 third medium diameter wire 35 third large diameter wire

Claims (5)

A stranded conductor having an inner layer configured by arranging 3 or more and 5 or less first inner layer wires in a central portion in a circumferential direction,
Outside the inner layer, the same number of first thin wires as the number of the first inner layer wires and a first thick wire having the same number as the first inner layer wires and a diameter larger than the diameter of the first thin wires Disposing a first outer layer composed of radial wires,
The first large-diameter wire is disposed outside the valley formed between the first inner layer wires adjacent in the circumferential direction, and one first thin wire is provided between the first large-diameter wires adjacent in the circumferential direction. A stranded conductor characterized in that a A stranded conductor having an inner layer configured by arranging 3 or more and 5 or less first inner layer wires in a central portion in a circumferential direction,
Outside the inner layer, the same number of first thin wires as the number of the first inner layer wires and a first thick wire having the same number as the first inner layer wires and a diameter larger than the diameter of the first thin wires Disposing a first outer layer composed of radial wires,
The first large-diameter wire is disposed outside the valley formed between the first inner layer wires adjacent in the circumferential direction, and one first thin wire is provided between the first large-diameter wires adjacent in the circumferential direction. and
Outside the first outer layer, the same number of second thin wires as the number of the first inner layer wires and the number of second thin wires twice the number of the first inner layer wires and having a diameter larger than the diameter of the second thin wire Disposing a second outer layer composed of a second thick wire,
The center of the second thin wire is positioned on the line connecting the center of the stranded conductor and the first thick wire, and two wires are arranged between the second thin wires adjacent in the circumferential direction. A second thick wire is arranged in the circumferential direction,
A stranded conductor, wherein a second large-diameter wire is arranged outside a valley formed between the first small-diameter wire and the first large-diameter wire. A stranded conductor having an inner layer configured by arranging 3 or more and 5 or less first inner layer wires in a central portion in a circumferential direction,
Outside the inner layer, the same number of first thin wires as the number of the first inner layer wires and a first thick wire having the same number as the first inner layer wires and a diameter larger than the diameter of the first thin wires Disposing a first outer layer composed of radial wires,
The first large-diameter wire is disposed outside the valley formed between the first inner layer wires adjacent in the circumferential direction, and one first thin wire is provided between the first large-diameter wires adjacent in the circumferential direction. and
Outside the first outer layer, the same number of second thin wires as the number of the first inner layer wires and the number of second thin wires twice the number of the first inner layer wires and having a diameter larger than the diameter of the second thin wire Disposing a second outer layer composed of a second thick wire,
The center of the second thin wire is positioned on the line connecting the center of the stranded conductor and the first thick wire, and two wires are arranged between the second thin wires adjacent in the circumferential direction. A second thick wire is arranged in the circumferential direction,
disposing a second large-diameter wire outside a valley formed between the first small-diameter wire and the first large-diameter wire,
Outside the second outer layer, the same number of third thin wires as the number of the first inner layer wires and the number of the third thin wires twice the number of the first inner layer wires and thicker than the diameter of the third thin wires disposing a third outer layer composed of third medium-diameter wires and third thick-diameter wires in the same number as the first inner-layer wires and having a diameter larger than that of the third medium-diameter wires;
The third large-diameter wire is disposed outside the valley formed between the second large-diameter wires adjacent in the circumferential direction, and two third intermediate wires are provided between the third large-diameter wires adjacent in the circumferential direction. A stranded conductor, wherein diameter wires are arranged at intervals, and one third small diameter wire is arranged between third medium diameter wires adjacent to each other in the circumferential direction. a distance from the center of the stranded conductor to the outer edge of the thickest wire among the wires forming the outermost layer in the radial direction;
4. The distance from the center of the stranded conductor to the outer edge of the thinnest strand of the strands forming the outermost layer in the radial direction is the same. or the stranded conductor according to item 1. 5. The stranded conductor according to any one of claims 1 to 4, wherein the strands forming the radially outermost layer are compressed and deformed from the outside.

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