Stranded-cable conductor

Abstract

To provide a stranded-cable conductor in which the total number of constituting strands can be reduced while a shape of a stranded-cable conductor is stabilized.SOLUTION: In an outermost layer part 20 and a first outer layer part 30, diameters of strands 21, 22, 31, 32 constituting one layer 20a, 20b, 30a, 30b thereof are made equal, and the number of strands 21 constituting the layer 20b positioned at the innermost side of the outermost layer part 20 is set to a half number of the number of strands 22 constituting the layer 20b positioned at the outermost side of the outermost layer part 20. In the outermost layer part 20 and the first outer layer part 30, the strands 21, 22, 31, 32 constituting one layer 20a, 20b, 30a, 30b thereof are disposed on the same circumference, and the strands 21, 22, 31, 32 adjacent in a circumferential direction are disposed so as to come into contact in the whole axial direction or in a part of the axial direction thereof.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a stranded conductor. [Background technology]

[0002] In recent years, in the electric wire market, there has been a demand for stranded conductors having a cross section that is closer to a circular shape in order to achieve smaller diameters, lighter weight, and higher performance for electric wires and cables.

[0003] Wire materials used for stranded conductors include bare copper wire, tin-plated wire, nickel-plated wire, silver-plated wire, aluminum wire, alloy wire, Litz wire, oxygen-free copper wire, linear crystal oxygen-free copper wire, and single crystal high-purity oxygen-free copper wire.

[0004] 18 and 19, the outer shape of the stranded conductor is formed to be nearly circular, and the outer layer 101 is formed of a plurality of layers, and the strands 102a, 103a, 104a, and 105a constituting each layer 102, 103, 104, and 105 are arranged on the same circumference and are all composed of the same number of strands. Also, stranded conductors 110 and 111 have been proposed in which the diameter of the strands 102a, 103a, and 104a constituting one layer 102, 103, and 104 is larger than the diameter of the strands 103a, 104a, and 105a constituting the layers 103, 104, and 105 located inside it (see Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4673361 Summary of the Invention [Problem to be solved by the invention]

[0006] In the above-mentioned Patent Document 1, in order to stabilize the shapes of stranded conductors 110, 111, it is desirable to increase the number of layers that make up outer layer 101, and stranded conductor 111 in FIG. 19 has a more stable shape than stranded conductor 110 in FIG. 18.

[0007] Increasing the number of layers increases the total number of strands constituting the stranded conductors 110, 111, which causes problems such as reduced production efficiency and increased manufacturing costs.

[0008] Therefore, an object of the present invention is to provide a stranded conductor that can reduce the total number of constituent wires while stabilizing the shape of the stranded conductor. [Means for solving the problem]

[0009] In order to solve the above problems, the present invention provides a stranded conductor having at least an outermost layer portion and a first outer layer portion provided radially inward of the outermost layer portion, In the outermost layer portion and the first outer layer portion, the diameters of the wires constituting one layer are all the same, The outermost layer portion and the first outer layer portion are each composed of a plurality of layers, The number of wires constituting the outermost layer of the outermost layer section is equal to the number of wires constituting the outermost layer of the first outer layer section, the number of strands constituting the innermost layer of the outermost layer portion is half the number of strands constituting the outermost layer of the outermost layer portion, In the outermost layer portion and the first outer layer portion, the wires constituting one layer are disposed on the same circumference, and adjacent wires in the circumferential direction are disposed so as to abut on each other over the entire axial direction or over a part of the axial direction, A wire constituting a layer other than the layer located on the outermost side in the radial direction and one of the outermost layer portion and the first outer layer portion constitutes a layer located one layer outside and abuts on an inner valley portion constituted by adjacent wires, The wires constituting the first outer layer portion have a smaller diameter than the wires constituting the outermost layer portion.

[0010] The sintered body further includes an outermost layer portion, a first outer layer portion provided radially inward of the outermost layer portion, and a second outer layer portion provided radially inward of the first outer layer portion, the outermost layer portion, the first outer layer portion, and the second outer layer portion have the same diameter of wires constituting one layer; The second outer layer portion is composed of a plurality of layers, the number of wires constituting the outermost layer of the outermost layer section is the same as the number of wires constituting the outermost layer of the first outer layer section, and the number of wires constituting the outermost layer of the second outer layer section; the number of wires constituting the innermost layer of the first outer layer portion is half the number of wires constituting the outermost layer of the outermost layer portion, In the outermost layer portion, the first outer layer portion, and the second outer layer portion, the wires constituting one layer are disposed on the same circumference, and adjacent wires in the circumferential direction are disposed so as to abut on each other over the entire axial direction or over a part of the axial direction, a strand constituting a layer other than the layer located on the outermost side in the radial direction and among the outermost layer portion, the first outer layer portion, and the second outer layer portion constitutes a layer located one layer outside and abuts on an inner valley portion constituted by adjacent strands; The diameter of each of the wires constituting the second outer layer portion may be smaller than the diameter of each of the wires constituting the first outer layer portion.

[0011] In addition, the number of wires constituting the innermost layer of the outermost layer portion may be the same as the number of wires constituting the innermost layer of the first outer layer portion, and may be half the number of wires constituting the outermost layer of the outermost layer portion.

[0012] Moreover, each of the outermost layer portion and the first outer layer portion may be configured with two layers.

[0013] Moreover, the outermost layer portion and the first outer layer portion are each composed of three layers, The number of wires constituting the outermost layer of the outermost layer portion is equal to that of the layer located inside thereof, The number of wires constituting the outermost layer of the first outer layer portion may be the same as that of the layer positioned inside thereof.

[0014] The outermost layer portion is made up of three layers, and the first outer layer portion is made up of two layers, The number of strands constituting the outermost layer of the outermost layer portion may be the same as that of the layer positioned inside it.

[0015] In addition, the number of strands constituting the innermost layer of the outermost layer portion, the number of strands constituting the innermost layer of the first outer layer portion, and the number of strands constituting the innermost layer of the second outer layer portion may be the same, and may be half the number of strands constituting the outermost layer of the outermost layer portion.

[0016] Moreover, each of the outermost layer portion, the first outer layer portion, and the second outer layer portion may be configured with two layers.

[0017] Moreover, the outermost layer portion, the first outer layer portion, and the second outer layer portion are each composed of three layers, The number of wires constituting the outermost layer of the outermost layer portion is equal to that of the layer located inside thereof, The number of wires constituting the outermost layer of the first outer layer portion is equal to the number of wires constituting the layer located inside thereof, The number of wires constituting the outermost layer of the second outer layer portion may be the same as that of the layer positioned inside thereof.

[0018] The outermost layer portion is made up of three layers, and the first outer layer portion and the second outer layer portion are each made up of two layers, The number of strands constituting the outermost layer of the outermost layer portion may be the same as that of the layer positioned inside it.

[0019] Moreover, the outermost layer portion and the first outer layer portion are each composed of three layers, and the second outer layer portion is composed of two layers, The number of wires constituting the outermost layer of the outermost layer portion is equal to that of the layer located inside thereof, The number of wires constituting the outermost layer of the first outer layer portion may be the same as that of the layer positioned inside thereof. Effect of the Invention

[0020] According to the present invention, the coil spring has at least an outermost layer portion and a first outer layer portion disposed radially inward of the outermost layer portion, the diameters of the strands constituting one layer in the outermost layer portion and the first outer layer portion are all the same, the outermost layer portion and the first outer layer portion are each composed of a plurality of layers, the number of strands constituting the outermost layer of the outermost layer portion is the same as the number of strands constituting the outermost layer of the first outer layer portion, the number of strands constituting the innermost layer of the outermost layer portion is half the number of strands constituting the outermost layer of the outermost layer portion, and the outermost layer portion and In the first outer layer portion, the wires constituting one layer are arranged on the same circumference, and adjacent wires in the circumferential direction are arranged so as to abut over their entire axial direction or over part of their axial direction. The wires constituting one layer of the outermost layer portion and the first outer layer portion other than the layer located on the outermost side in the radial direction constitute the layer located one position outside within that one layer, and abut against the inner valley portion formed by adjacent wires. This makes it possible to stabilize the shape while reducing the total number of wires constituting the wires compared to the conventional technology described above. [Brief description of the drawings]

[0021] [Figure 1] FIG. 2 is a cross-sectional view of a stranded conductor according to the first embodiment of the present invention. [Diagram 2] FIG. 11 is a cross-sectional view showing an example of a stranded conductor according to a third embodiment of the present invention. [Diagram 3] FIG. 11 is a cross-sectional view showing another example of a stranded conductor according to the third embodiment of the present invention. [Figure 4] FIG. 11 is a cross-sectional view showing another example of a stranded conductor according to the third embodiment of the present invention. [Diagram 5] FIG. 11 is a cross-sectional view showing another example of a stranded conductor according to the third embodiment of the present invention. [Figure 6] FIG. 11 is a cross-sectional view showing an example of a stranded conductor according to a fourth embodiment of the present invention. [Figure 7] FIG. 11 is a cross-sectional view showing another example of a stranded conductor according to the fourth embodiment of the present invention. [Figure 8] FIG. 11 is a cross-sectional view showing another example of a stranded conductor according to the fourth embodiment of the present invention. [Figure 9]FIG. 11 is a cross-sectional view showing an example of a stranded conductor according to a fifth embodiment of the present invention. [Figure 10] FIG. 13 is a cross-sectional view showing an example of a stranded conductor according to a sixth embodiment of the present invention. [Figure 11] FIG. 13 is a cross-sectional view showing an example of a stranded conductor according to a seventh embodiment of the present invention. [Figure 12] FIG. 13 is a cross-sectional view showing an example of a stranded conductor according to an eighth embodiment of the present invention. [Figure 13] FIG. 13 is a cross-sectional view showing an example of a stranded conductor according to a ninth embodiment of the present invention. [Figure 14] FIG. 16 is a cross-sectional view showing an example of a stranded conductor according to a tenth embodiment of the present invention. [Figure 15] FIG. 15 is a cross-sectional view showing an example of a stranded conductor according to an eleventh embodiment of the present invention. [Figure 16] FIG. 23 is a cross-sectional view showing an example of a stranded conductor according to a thirteenth embodiment of the present invention. [Figure 17] FIG. 23 is a cross-sectional view showing an example of a stranded conductor according to a fourteenth embodiment of the present invention. [Figure 18] FIG. 1 is a cross-sectional view of a prior art stranded conductor. [Figure 19] FIG. 1 is a cross-sectional view of a prior art stranded conductor. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

[0023] [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, and the diagonal lines indicating the cross sections of each strand are omitted to avoid complicating the drawing.

[0024] The stranded conductor 1 is composed of five types of wires: an outermost layer first wire 21 , an outermost layer second wire 22 , a first outer layer first wire 31 , a first outer layer second wire 32 , and a center wire 51 .

[0025] The outermost layer first wires 21 and the first outer layer first wires 31 each have 12 wires, and the outermost layer second wires 22 and the first outer layer second wires 32 each have 6 wires, which is half the number of the outermost layer first wires 21.

[0026] The wire material that forms the base of each of the element wires 21, 22, 31, 32, 51 may be a bare copper wire, an oxygen-free copper wire, a linear crystal oxygen-free copper wire, a single crystal high purity oxygen-free copper wire, or any of these copper wires plated with tin, nickel, silver, or the like, an aluminum wire, any of various alloy wires, or an insulating coated wire such as an enamel wire, a Litz wire, or a formal wire. The material of each of the element wires 21, 22, 31, 32, 51 may be the same or different.

[0027] 1, the stranded conductor 1 includes an outermost layer portion 20 composed of two layers, a first outermost layer 20a and a second outermost layer 20b, and a first outer layer portion 30 composed of two layers, a first outer layer 30a and a second outer layer 30b. The first outer layer portion 30 is provided on the radially inner side of the stranded conductor 1 in the outermost layer portion 20, and a single center wire 51 constituting an inner layer portion 50 is disposed on the radially inner side of the stranded conductor 1 in the first outer layer portion 30.

[0028] 1, the outermost first layer 20a is configured by arranging 12 outermost first strands 21 on the same circumference. The outermost first layer 20a is configured of outermost first strands 21 that are circular in cross section and all have the same diameter. In addition, the outermost first strands 21, 21 adjacent to each other in the circumferential direction about the center of the stranded conductor 1 are arranged so as to abut over their entire axial direction or over part of their axial direction.

[0029] The outermost second layer 20b is provided on the radially inner side of the outermost first layer 20a of the stranded conductor 1. As shown in Fig. 1, the outermost second layer 20b is configured by arranging six outermost second strands 22 on the same circumference. The outermost second layer 20b has a circular cross section and is configured of outermost second strands 22 all having the same diameter.

[0030] The outermost layer second strands 22, 22 adjacent to each other in the circumferential direction about the center of the stranded conductor 1 are arranged to abut over their entire axial direction or a portion of the axial direction. The outermost layer second strands 22 are arranged to abut over the entire axial direction or a portion of the axial direction against an inner valley portion 25 formed by the outermost layer first strands 21, 21 adjacent to each other in the circumferential direction about the center of the stranded conductor 1.

[0031] The diameter d22 of the outermost layer second strand 22 is the same as the diameter d21 of the outermost layer first strand 21.

[0032] The first outer layer first layer 30a is provided on the radially inner side of the outermost second layer 20b of the stranded conductor 1. As shown in Fig. 1, the first outer layer first layer 30a is configured by arranging twelve first outer layer first strands 31 on the same circumference. The first outer layer first layer 30a has a circular cross section and is configured of first outer layer first strands 31 all of the same diameter.

[0033] The first outer-layer first strands 31, 31 adjacent to each other in the circumferential direction about the center of the stranded conductor 1 are arranged to abut over the entire axial direction or a portion of the axial direction. Two first outer-layer first strands 31, 31 adjacent to each other in the circumferential direction are arranged to abut over the entire axial direction or a portion of the axial direction of the first outer-layer first strands 31 with an inner valley portion 26 formed by the outermost layer second strands 22, 22 adjacent to each other in the circumferential direction about the center of the stranded conductor 1.

[0034] The diameter d31 of the first outer-layer first strand 31 is smaller than the diameter d22 of the outermost layer second strand 22.

[0035] The first outer layer second layer 30b is provided on the radially inner side of the first outer layer first layer 30a of the stranded conductor 1. As shown in Fig. 1, the first outer layer second layer 30b is configured by arranging six first outer layer second strands 32 on the same circumference. The first outer layer second layer 30b has a circular cross section and is configured of first outer layer second strands 32 all of the same diameter.

[0036] The first outer-layer second strands 32, 32 adjacent to each other in the circumferential direction about the center of the stranded conductor 1 are arranged to abut over their entire axial direction or over a portion of their axial direction. The first outer-layer second strands 32 are arranged to abut over the entire axial direction or over a portion of their axial direction against an inner valley portion 35 formed by the first outer-layer first strands 31, 31 adjacent to each other in the circumferential direction about the center of the stranded conductor 1.

[0037] The diameter d32 of the first outer layer second wire 32 is formed to be the same as the diameter d31 of the first outer layer first wire 31. In other words, the diameters d31, d32 of the wires 31, 32 constituting the first outer layer portion 30 are formed to be smaller than the diameters d21, d22 of the wires 21, 22 constituting the outermost layer portion 20.

[0038] The single center wire 51 is provided radially inside the stranded conductor 1 in the first outer layer second layer 30b so as to abut against the six first outer layer second strands 32.

[0039] In the present embodiment 1, when the center line 51 has a diameter d5, the wires 21, 22, 31, 32, and 51 used satisfy the relationships d22=d21, d3=0.215×d21, d31=d21, d32=d21, and d51=d3.

[0040] In addition, the cross-sectional shape of the stranded wire conductor 1 is formed to be approximately circular, that is, the distance L1 from the center of the stranded wire conductor 1 to the outermost edge of each of the outermost first wires 21 that constitute the outermost first layer 20a is approximately the same.

[0041] The stranded conductor 1 of the present invention has the above-mentioned structure and therefore provides the following functions and effects.

[0042] The outer shape of the stranded conductor 1 can be made substantially circular without compression, and the strands 21, 22, 31, 32, and 51 can be in contact with substantially all of the adjacent strands 21, 22, 31, 32, and 51. In addition, the outer shape of the stranded conductor 1 can be made substantially circular without compression.

[0043] Furthermore, by making the number of strands 22 constituting the outermost second layer 20b half the number of strands 21 constituting the outermost first layer 20a, and by making the number of strands 32 constituting the first outer second layer 30b half the number of strands 31 constituting the first outer first layer 30a, the total number of strands constituting the stranded conductor 1 of the present invention can be made less than the total number of strands constituting the stranded conductor of the above-mentioned conventional technology, thereby improving production efficiency and reducing manufacturing costs compared to the above-mentioned conventional technology.

[0044] By forming the outer shape of the stranded conductor 1 into a substantially perfect circle without compressing it, each of the strands 21, 22, 31, 32, 51 can maintain its physical properties such as elongation, flexibility, and ductility without losing them. Therefore, the stranded conductor 1 can have highly reliable quality and can be effectively used in fields such as automotive electric wires and acoustic electric wires.

[0045] [Example 2] If the number of strands 22 constituting the outermost second layer 20b is half the number of strands 21 constituting the outermost first layer 20a, the number of strands 32 constituting the first outer second layer 30b is half the number of strands 31 constituting the first outer first layer 30a, and the diameters d31, d32 of the strands 31, 32 constituting the first outer layer portion 30 are smaller than the diameters d21, d22 of the strands 21, 22 constituting the outermost layer portion 20, the stranded conductor can be formed using any strands other than the strands having the diameters described in Example 1. The stranded conductor may also be compressed from the outside of the outermost first layer 20a, which is the layer located on the outermost side of the stranded conductor, by a compression die or the like.

[0046] This compression causes the outer periphery of the outermost first strand 21 constituting the outermost first layer 20a to be compressed and deformed, so that 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 is manufactured, or may be performed after the stranded conductor is manufactured. The compression ratio may be set arbitrarily.

[0047] The other structure is the same as that of the first embodiment, and therefore the description will be omitted.

[0048] In the second embodiment as well, the same effects as those in the first embodiment can be achieved.

[0049] [Example 3] In the above Examples 1 and 2, the outermost layer first wires 21 and the first outer layer first wires 31 were each composed of 12 wires, and the outermost layer second wires 22 and the first outer layer second wires 32 were each composed of 6 wires, which is half the number of the outermost layer first wires 21. However, if the numbers of the outermost layer first wires 21 and the first outer layer first wires 31 are the same, the number of the outermost layer second wires 22 and the first outer layer second wires 32 are each half the number of the outermost layer first wires 21, and the number of the outermost layer first wires 21 and the first outer layer first wires 31 are an even number of 10 or more, the numbers of wires 21, 22, 31, 32, 51 can each be set to any number.

[0050] The outermost layer first wires 21, the outermost layer second wires 22, the first outer layer first wires 31, the first outer layer second wires 32, and the center wire 51 are arranged with the same regularity as in the first and second embodiments above.

[0051] The diameters d31, d32 of the wires 31, 32 constituting the first outer layer portion 30 are smaller than the diameters d21, d22 of the wires 21, 22 constituting the outermost layer portion 20.

[0052] For example, in the case of a stranded conductor (not shown) consisting of 10 outermost layer first wires 21 and 10 first outer layer first wires 31, and 5 outermost layer second wires 22 and 32, respectively, which is half the number of outermost layer first wires 21, by using wire material as the base for each wire 21, 22, 31, 32, 51, in which the relationships d22 = 0.875 × d21, d31 = 0.15 × d21, d32 = 0.13 × d1, and d51 = 0.09 × d21 are satisfied, the cross-sectional shape of the stranded conductor can be made approximately circular with no compression or a low compression rate.

[0053] Furthermore, in the case of a stranded conductor 2 having 14 outermost first strands 21 and 1st outer layer first strands 31 each, and having 7 outermost second strands 22 and 1st outer layer second strands 32 each, which is half the number of outermost first strands 21, as shown in FIG. 2, by using wire material as the base for each strand 21, 22, 31, 32, 51, in which the relationships d22 = 1.1 × d21, d31 = 0.27 × d21, d32 = 0.30 × d21, d51 = 0.39 × d21 are satisfied, the cross-sectional shape of the stranded conductor 2 can be made approximately circular with no compression or a low compression rate.

[0054] Furthermore, in the case of a stranded conductor 3 having 16 each of the outermost layer first strands 21 and the first outer layer first strands 31, and having 8 each of the outermost layer second strands 22 and the first outer layer second strands 32, which is half the number of the outermost layer first strands 21, as shown in Figure 3, by using wire material as the base for each strand 21, 22, 31, 32, 51, in which the relationships d22 = 1.18 x d21, d31 = 0.32 x d21, d32 = 0.38 x d21, d51 = 0.615 x d11 hold, the cross-sectional shape of the stranded conductor 3 can be made approximately circular with no compression or a low compression rate.

[0055] Furthermore, in the case of a stranded conductor 4 having 18 outermost first strands 21 and 18 first outer layer first strands 31, and having 9 outermost second strands 22 and 32, which is half the number of outermost first strands 21, as shown in FIG. 4, by using wire material as the base for each strand 21, 22, 31, 32, 51, in which the relationships d22 = 1.25 × d21, d31 = 0.365 × d21, d32 = 0.455 × d21, d51 = 0.875 × d21 are satisfied, the cross-sectional shape of the stranded conductor 4 can be made approximately circular with no compression or a low compression rate.

[0056] Furthermore, in the case of a stranded conductor 5 having 20 each of the outermost layer first strands 21 and the first outer layer first strands 31, and 10 each of the outermost layer second strands 22 and the first outer layer second strands 32, as shown in FIG. 5, by using wire material as the base for each strand 21, 22, 31, 32, 51, in which the relationships d22 = 1.305 × d21, d31 = 0.405 × d21, d32 = 0.53 × d21, and d51 = 1.185 × d21 are satisfied, the cross-sectional shape of the stranded conductor 5 can be made approximately circular with no compression or a low compression rate.

[0057] The other structure is similar to that of the first and second embodiments, and therefore the description thereof will be omitted.

[0058] In the third embodiment as well, the same effects as those in the first and second embodiments can be achieved.

[0059] [Example 4] In the above Examples 1 to 3, the outermost layer portion 20 was composed of two layers and the first outer layer portion 30 was composed of two layers each, but the number of layers constituting the outermost layer portion 20 and the first outer layer portion 30 can be set to any number as long as it is more than one.

[0060] The number of strands in each layer constituting the outermost layer is the same. Each layer constituting the outermost layer is formed by arranging strands of the same diameter on the same circumference. In the outermost layer, the number of strands in the layer located radially innermost of the stranded conductor is half the number of strands in the layer located radially outermost of the stranded conductor. In the outermost layer, the number of strands other than the layer located radially innermost of the stranded conductor is the same as the number of strands in the layer located radially outermost of the stranded conductor.

[0061] In each layer constituting the outermost layer, adjacent outermost strands in the circumferential direction around the center of the stranded conductor are arranged so as to abut over their entire axial direction or over part of their axial direction.

[0062] The number of strands in each layer constituting the first outer layer is the same. Each layer constituting the first outer layer is formed by arranging strands of the same diameter on the same circumference. In the first outer layer, the number of strands in the layer located radially innermost of the stranded conductor is half the number of strands in the layer located radially outermost of the stranded conductor. In the first outer layer, the number of strands in the layer other than the layer located radially innermost of the stranded conductor is the same as the number of strands in the layer located radially outermost of the stranded conductor.

[0063] In addition, in each layer constituting the first outer layer portion, adjacent outermost wires in the circumferential direction around the center of the stranded conductor are arranged so as to abut over their entire axial direction or over part of their axial direction.

[0064] It is preferable that the number of layers constituting the outermost layer portion is the same as the number of layers constituting the first outer layer portion.

[0065] The strands constituting the outermost layer portion and one of the layers other than the layer located radially outward of the stranded conductor constitute the next outermost layer in that one layer and are adapted to abut against the inner valley portions formed by adjacent strands. Also, the strands constituting one of the layers in the first outer layer portion constitute the next outermost layer in that one layer and are adapted to abut against the inner valley portions formed by adjacent strands.

[0066] For example, as shown in Figures 6 to 8, the outermost layer 60 is composed of three layers: an outermost first layer 60a composed of an outermost first strand 61; an outermost second layer 60b arranged radially inward of the stranded conductors 6, 7, 8 and composed of an outermost second strand 62; and an outermost third layer 60c arranged radially inward of the stranded conductors 6, 7, 8 and composed of an outermost third strand 63.

[0067] The first outer layer portion 70 is composed of three layers: a first outer layer first layer 70a composed of a first outer layer first strand 71, a first outer layer second layer 70b arranged radially inward of the stranded conductors 6, 7, 8 and composed of a first outer layer second strand 72, and a first outer layer third layer 70c arranged radially inward of the stranded conductor 1 and composed of a first outer layer third strand 73. A single center wire 91 constituting the inner layer portion 90 is disposed radially inward of the stranded conductors 6, 7, 8 in the first outer layer third layer 70c of the first outer layer portion 70.

[0068] The outermost layer first wires 61 and the outermost layer second wires 62 are configured in the same number, and the number of the outermost layer third wires 63 is half that of the outermost layer first wires 61.

[0069] The outermost first layer 60a is configured similarly to the outermost first layer 20a of Examples 1 to 3 above, and the outermost third layer 60c is configured similarly to the outermost first layer 20b of Examples 1 to 3 above.

[0070] The outermost second layer 60b is configured by arranging the outermost second strands 62 on the same circumference. The outermost second layer 60b is configured of the outermost second strands 62 that are circular in cross section and all have the same diameter. In addition, the outermost second strands 62, 62 that are adjacent in the circumferential direction about the center of the stranded conductors 6, 7, 8 are arranged so as to abut over the entire axial direction or over part of the axial direction.

[0071] The outermost layer second strands 62, 62 adjacent to each other in the circumferential direction about the center of the stranded conductors 6, 7, 8 are arranged to abut over their entire axial direction or a portion of their axial direction. The outermost layer second strands 62 are arranged to abut over the entire axial direction or a portion of their axial direction against an inner valley portion 65 formed by the outermost layer first strands 61, 61 adjacent to each other in the circumferential direction about the center of the stranded conductors 6, 7, 8.

[0072] The outermost layer third wire 63 is arranged so as to abut the entire axial direction or part of the axial direction of the outermost layer third wire 63 against the inner valley portion 66 formed by the outermost layer second wires 62, 62 that are adjacent in the circumferential direction around the center of the stranded conductors 6, 7, 8.

[0073] The outermost layer first wires 61 , the first outer layer first wires 71 and the first outer layer second wires 72 are configured in the same number, and the number of first outer layer third wires 73 is half that of the outermost layer first wires 61 .

[0074] The first outer layer first layer 70a is configured similarly to the first outer layer first layer 30a of Examples 1 to 3 above, and the first outer layer third layer 70c is configured similarly to the first outer layer first layer 30b of Examples 1 to 3 above.

[0075] The first outer layer second layer 70b is configured by arranging the first outer layer second strands 72 on the same circumference. The first outer layer second layer 70b is configured of first outer layer second strands 72 that are circular in cross section and all have the same diameter. In addition, the first outer layer second strands 72, 72 that are adjacent in the circumferential direction about the center of the stranded conductors 6, 7, 8 are arranged so as to abut over the entire axial direction or over part of the axial direction.

[0076] Two circumferentially adjacent first outer layer second wires 71, 71 are arranged so as to abut the entire axial direction or part of the axial direction of the first outer layer second wires 71 in the inner valley portion 67 formed by circumferentially adjacent outermost layer third wires 63, 63 centered on the center of the stranded conductors 6, 7, 8.

[0077] The first outer-layer second strands 72, 72 adjacent to each other in the circumferential direction about the center of the stranded conductors 6, 7, 8 are arranged to abut over their entire axial direction or over a portion of their axial direction. The first outer-layer second strands 72 are arranged to abut over the entire axial direction or over a portion of their axial direction against an inner valley portion 75 formed by the first outer-layer first strands 71, 71 adjacent to each other in the circumferential direction about the center of the stranded conductors 6, 7, 8.

[0078] The first outer layer third wire 73 is arranged so as to abut an inner valley portion 76 formed by adjacent first outer layer second wires 72, 72 in the circumferential direction around the center of the stranded conductors 6, 7, 8, over the entire axial direction of the first outer layer third wire 73 or over part of the axial direction.

[0079] For example, as shown in FIG. 6 , a stranded conductor 6 is configured with 16 each of the outermost layer first strands 61, the outermost layer second strands 62, the first outer layer first strands 71, and the first outer layer second strands 72, and with 8 each of the outermost layer third strands 63 and the first outer layer third strands 73, which is half the number of the outermost layer first strands 61. The diameter of the outermost layer first strands 61 is d61, the diameter of the outermost layer second strands 62 is d62, the diameter of the outermost layer third strands 63 is d63, the diameter of the first outer layer first strands 71 ​​is d71, the diameter of the first outer layer second strands 72 is d72, and the diameter of the first outer layer second strands 72 is d73. If the diameter of the outer layer third wire 73 is d73 and the diameter of the center wire 91 is d91, then by using wire material as the base for each wire 61, 62, 63, 71, 72, 73, 91 such that the relationships d62 = 0.71 x d61, d63 = 0.84 x d61, d71 = 0.225 x d61, d72 = 0.16 x d61, d73 = 0.19 x d61, d91 = 0.305 x d61 are satisfied, the cross-sectional shape of the stranded conductor 6 can be made approximately circular with no compression or a low compression rate.

[0080] Furthermore, as shown in FIG. 7, in the case of a stranded conductor 7 consisting of 18 each of the outermost layer first strands 61, the outermost layer second strands 62, the first outer layer first strands 71, and the first outer layer second strands 72, and 9 each of the outermost layer third strands 63 and the first outer layer third strands 73, which is half the number of the outermost layer first strands 61, by using wire material that serves as the base for each strand 61, 62, 63, 71, 72, 73, and 91 such that the relationships d62=0.735×d61, d63=0.92×d61, d71=0.27×d61, d72=0.20×d61, d73=0.25×d61, and d91=0.48×d61 are satisfied, the cross-sectional shape of the stranded conductor 7 can be made substantially circular with no compression or a low compression rate.

[0081] Furthermore, as shown in FIG. 8, in the case of a stranded conductor 8 consisting of 20 each of the outermost layer first strands 61, the outermost layer second strands 62, the first outer layer first strands 71, and the first outer layer second strands 72, and 10 each of the outermost layer third strands 63 and the first outer layer third strands 73, which is half the number of the outermost layer first strands 61, by using wire material as the base for each strand 61, 62, 63, 71, 72, 73, 91, for which the relationships d62=0.76×d61, d63=0.995×d61, d71=0.31×d61, d72=0.235×d61, d73=0.305×d61, d91=0.68×d61 are satisfied, the cross-sectional shape of the stranded conductor 8 can be made substantially circular with no compression or a low compression rate.

[0082] The other structures are the same as those in the first to third embodiments, and therefore the description thereof will be omitted.

[0083] In the fourth embodiment as well, the same effects as those in the first to third embodiments can be achieved.

[0084] [Example 5] The first outer layer portion 70 of the stranded conductors 6, 7, and 8 in the above-mentioned Example 4 was composed of three layers, namely, the first outer layer first layer 70a, the first outer layer second layer 70b, and the first outer layer third layer 70c. However, for example, as shown in FIG. 9, the stranded conductor 9 may be composed of two layers, namely, the first outer layer first layer 70a and the first outer layer third layer 70c.

[0085] The first outer layer third wire 73 is arranged so as to abut an inner valley portion 75 formed by adjacent first outer layer first wires 71, 71 in the circumferential direction around the center of the stranded conductor 9, over the entire axial direction of the first outer layer third wire 73 or over part of the axial direction.

[0086] For example, in the case of a stranded conductor 9 as shown in FIG. 9 , in which the outermost layer first strands 61, the outermost layer second strands 62, and the first outer layer first strands 71 ​​each consist of 26 wires, and the outermost layer third strands 63 and the first outer layer third strands 73 each consist of 13 wires, which is half the number of the outermost layer first strands 61, by using wire material as the base for each strand 61, 62, 63, 71, 73, 91, in which the relationships d62 = 0.81 × d61, d63 = 1.165 × d61, d71 = 0.405 × d61, d73 = 0.58 × d61, d91 = 1.84 × d61 are satisfied, the cross-sectional shape of the stranded conductor 9 can be made approximately circular with no compression or a low compression rate.

[0087] The other structure is the same as that of the fourth embodiment, and therefore the description will be omitted.

[0088] In this fifth embodiment as well, the same effects as those in the first to fourth embodiments can be achieved.

[0089] [Example 6] The present embodiment 6 is an embodiment in which the first outer layer third layer 70c of the first outer layer portion 70 of the stranded wire conductors 6, 7, 8 of the above-mentioned embodiment 4 is not provided. The first outer layer portion 70 of the stranded wire conductors 6, 7, 8 of the above-mentioned embodiment 4 is composed of three layers, namely, the first outer layer first layer 70a, the first outer layer second layer 70b, and the first outer layer third layer 70c, but it may also be composed of two layers, namely, the first outer layer first layer 70a and the first outer layer second layer 70b.

[0090] For example, in the case of a stranded conductor 10 as shown in FIG. 10 in which the outermost layer first strands 61, the outermost layer second strands 62, the first outer layer first strands 71, and the first outer layer second strands 72 each consist of 16 wires, and the outermost layer third strands 63 each consist of 8 wires, which is half the number of the outermost layer first strands 61, by using wire material as the base for each strand 61, 62, 63, 71, 72, 91 in which the relationships d62 = 0.71 × d61, d63 = 0.84 × d61, d71 = 0.225 × d61, d73 = 0.16 × d61, and d91 = 1.66 × d61 are satisfied, the cross-sectional shape of the stranded conductor 10 can be made approximately circular with no compression or a low compression rate.

[0091] The other structure is the same as that of the fourth embodiment, and therefore the description will be omitted.

[0092] In this fifth embodiment as well, the same effects as those of the first to fifth embodiments can be achieved.

[0093] [Example 7] The seventh embodiment is an embodiment in which a second outer layer portion 40 is provided on the radially inner side of the first outer layer portion 30 of each of the stranded conductors 1, 2, 3, 4, and 5 of the first to third embodiments.

[0094] The outermost layer 20 and the first outer layer 30 of this embodiment are configured similarly to the outermost layer 20 and the first outer layer 30 of the stranded conductors 1, 2, 3, 4, and 5 of Examples 1 to 3 described above.

[0095] The second outer layer portion 40 is composed of two layers, a second outer layer first layer 40a and a second outer layer second layer 40b provided radially inward of the stranded conductor in the second outer layer first layer 40a. A single center wire 51 constituting the inner layer portion 50 is disposed radially inward of the stranded conductor in the second outer layer portion 30.

[0096] The second outer layer first layer 40a is provided on the radially inner side of the stranded conductor in the first layer second layer 30b. The second outer layer first layer 40a is formed by arranging second outer layer first strands 41 on the same circumference, for example, as shown in Fig. 11. The second outer layer first layer 40a is formed of second outer layer first strands 41 that are circular in cross section and all have the same diameter.

[0097] The second outer layer first strands 41, 41 adjacent to each other in the circumferential direction about the center of the stranded conductor are arranged to abut over the entire axial direction or a part of the axial direction. The second outer layer first strand 41 is arranged to abut over the entire axial direction or a part of the axial direction with an inner valley portion 36 formed by the first outer layer second strands 32, 32 adjacent to each other in the circumferential direction about the center of the stranded conductor.

[0098] The second outer layer second layer 40b is provided on the radially inner side of the stranded conductor in the second outer layer first layer 40a. The second outer layer second layer 40b is formed by arranging the second outer layer second strands 42 on the same circumference, for example, as shown in Fig. 11. The second outer layer second layer 40b is formed of the second outer layer second strands 42 that are circular in cross section and all have the same diameter.

[0099] The second outer layer second strands 42, 42 adjacent to each other in the circumferential direction about the center of the stranded conductor are arranged to abut over the entire axial direction or a portion of the axial direction. The second outer layer second strands 42 are arranged to abut over the entire axial direction or a portion of the axial direction with an inner valley portion 45 formed by the second outer layer first strands 41, 41 adjacent to each other in the circumferential direction about the center of the stranded conductor.

[0100] The diameters d41, d42 of the wires 41, 42 constituting the second outer layer portion 40 are smaller than the diameters d31, d32 of the wires 31, 32 constituting the first outer layer portion 30.

[0101] The single center wire 51 constituting the inner layer portion 50 is provided radially inward of the stranded conductor in the second outer layer second layer 40b so as to abut against each of the second outer layer second wires 42.

[0102] For example, as shown in FIG. 11, in the case of a stranded conductor 11 in which the outermost layer first strands 21, the first outer layer first strands 31, and the second outer layer first strands 41 each have 26 wires, and the outermost layer second strands 22, the first outer layer second strands 32, and the second outer layer second strands 42 each have 13 wires, which is half the number of the outermost layer first strands 21, d22=1.435×d21, d31=0.5 By using wire material as the basis for each strand 21, 22, 31, 32, 41, 42, 51 in which the relationships 0×d21, d32=0.72×d21, d41=0.25×d21, d42=0.36×d21, d51=1.145×d21 hold, the cross-sectional shape of the stranded conductor 11 can be made approximately circular with no compression or with a low compression rate.

[0103] The other structures are the same as those in the first to third embodiments, and therefore the description thereof will be omitted.

[0104] In the seventh embodiment as well, the same effects as those in the first to third embodiments can be achieved.

[0105] [Example 8] The eighth embodiment is an embodiment in which a second outer layer portion 80 is provided on the radially inner side of the first outer layer portion 70 of the stranded conductors 6, 7, and 8 of the fourth embodiment.

[0106] The outermost layer 60 and the first outer layer 70 of this embodiment are configured similarly to the outermost layer 60 and the first outer layer 70 of the stranded conductors 6, 7, 8 of the fourth embodiment described above.

[0107] The second outer layer portion 80 is composed of three layers: a second outer layer first layer 80a, a second outer layer second layer 80b provided radially inward of the stranded conductor in the second outer layer first layer 80a, and a second outer layer third layer 80c provided radially inward of the stranded conductor in the second outer layer second layer 80b. A single center wire 91 constituting an inner layer portion 90 is disposed radially inward of the stranded conductor in the second outer layer portion 80.

[0108] The second outer layer first layer 80a is provided on the radially inner side of the stranded conductor in the first layer / third layer 70c. The second outer layer first layer 80a is formed by arranging second outer layer first strands 81 on the same circumference, for example, as shown in Fig. 12. The second outer layer first layer 80a is formed of second outer layer first strands 81 that are circular in cross section and all have the same diameter.

[0109] The second outer layer first strands 81, 81 adjacent to each other in the circumferential direction about the center of the stranded conductor are arranged to abut over the entire axial direction or a part of the axial direction. The second outer layer first strand 81 is arranged to abut over the entire axial direction or a part of the axial direction with an inner valley portion 77 formed by the first outer layer third strands 73, 73 adjacent to each other in the circumferential direction about the center of the stranded conductor.

[0110] The second outer layer second layer 80b is provided on the radially inner side of the stranded conductor in the second outer layer first layer 80a. The second outer layer second layer 80b is formed by arranging second outer layer second strands 82 on the same circumference, for example, as shown in Fig. 12. The second outer layer second layer 80b is formed of second outer layer second strands 82 that are circular in cross section and all have the same diameter.

[0111] The second outer-layer second strands 82, 82 adjacent to each other in the circumferential direction about the center of the stranded conductor are arranged to abut over the entire axial direction or a part of the axial direction. The second outer-layer second strands 82 are arranged to abut over the entire axial direction or a part of the axial direction with an inner valley portion 85 formed by the second outer-layer first strands 81, 81 adjacent to each other in the circumferential direction about the center of the stranded conductor.

[0112] The second outer layer third layer 80c is provided on the radially inner side of the stranded conductor in the second outer layer second layer 80b. The second outer layer third layer 80c is formed by arranging second outer layer third strands 83 on the same circumference, for example, as shown in Fig. 12. The second outer layer third layer 80c is formed of second outer layer third strands 83 that are circular in cross section and all have the same diameter.

[0113] The second outer-layer third wires 83, 83 adjacent to each other in the circumferential direction about the center of the stranded conductor are arranged to abut over the entire axial direction or a part of the axial direction. The second outer-layer third wire 83 is arranged to abut over the entire axial direction or a part of the axial direction with an inner valley portion 86 formed by the second outer-layer second wires 82, 82 adjacent to each other in the circumferential direction about the center of the stranded conductor.

[0114] The diameters d81, d82, d83 of the wires 81, 82, 83 constituting the second outer layer portion 80 are smaller than the diameters d71, d72, d73 of the wires 71, 72, 73 constituting the first outer layer portion .

[0115] The single center wire 91 constituting the inner layer portion 90 is provided radially inward of the stranded conductor in the second outer layer third layer 80c so as to abut against each of the second outer layer third wires 83.

[0116] For example, as shown in FIG. 12, in the case of a stranded conductor 12 including 26 each of the outermost layer first strands 61, the outermost layer second strands 62, the first outer layer first strands 71, the first outer layer second strands 72, the second outer layer first strands 81, and the second outer layer second strands 82, and 13 each of the outermost layer third strands 63, the first outer layer third strands 73, and the second outer layer third strands 83, which is half the number of the outermost layer first strands 61, then d62=0.81×d61, d63=1.165×d61, d71= By using wire material as the basis for each strand 61, 62, 63, 71, 72, 73, 81, 82, 83, and 91, in which the relationships 0.405×d61, d72=0.325×d61, d73=0.465×d61, d81=0.16×d61, d82=0.13×d61, d83=0.185×d61, and d91=0.585×d61 are satisfied, the cross-sectional shape of the stranded conductor 12 can be made approximately circular with no compression or a low compression rate.

[0117] The other structure is the same as that of the fourth embodiment, and therefore the description will be omitted.

[0118] In the eighth embodiment as well, the same effects as those in the fourth embodiment can be achieved.

[0119] [Example 9] The second outer layer portion 80 of the stranded conductor 12 in Example 8 above is composed of three layers, namely, the second outer layer first layer 80a, the second outer layer second layer 80b, and the second outer layer third layer 80c. However, for example, as shown in FIG. 13, it may be composed of two layers, namely, the second outer layer first layer 80a and the second outer layer third layer 80c.

[0120] The second outer layer third wire 83 is arranged so as to abut over the entire axial direction or over part of the axial direction of the second outer layer third wire 83 against an inner valley portion 85 formed by adjacent second outer layer first wires 81, 81 in the circumferential direction around the center of the stranded conductor.

[0121] For example, as shown in FIG. 13, in the case of a stranded conductor 12 in which the outermost layer first strands 61, the outermost layer second strands 62, the first outer layer first strands 71, the first outer layer second strands 72, and the second outer layer first strands 81 are each 26 wires, and the outermost layer third strands 63, the first outer layer third strands 73, and the second outer layer third strands 83 are each 13 wires, which is half the number of the outermost layer first strands 61, then d62=0.81×d61, d63=1.165×d61, d By using wire material as the basis for each strand 61, 62, 63, 71, 72, 73, 81, 83, and 91, in which the relationships 71=0.405×d61, d72=0.325×d61, d73=0.465×d61, d81=0.16×d61, d83=0.23×d61, and d91=0.74×d61 are satisfied, the cross-sectional shape of the stranded conductor 13 can be made approximately circular with no compression or a low compression rate.

[0122] The other structure is the same as that of the fourth embodiment, and therefore the description will be omitted.

[0123] In this fifth embodiment as well, the same effects as those in the first to fourth embodiments can be achieved.

[0124] [Example 10] The first outer layer portion 70 of the stranded conductor 13 in the above-mentioned Example 9 was composed of three layers, namely, the first outer layer first layer 70a, the first outer layer second layer 70b, and the first outer layer third layer 70c. However, for example, as shown in FIG. 14, it may be composed of two layers, namely, the first outer layer first layer 70a and the first outer layer third layer 70c.

[0125] The first outer layer third wire 73 is arranged so as to abut the entire axial direction or part of the axial direction of the first outer layer third wire 73 against the inner valley portion 75 formed by adjacent first outer layer first wires 71, 71 in the circumferential direction around the center of the stranded conductor.

[0126] For example, as shown in FIG. 14, in the case of a stranded conductor 12 in which the outermost layer first strands 61, the outermost layer second strands 62, the first outer layer first strands 71, and the second outer layer first strands 81 are each 26 wires, and the outermost layer third strands 63, the first outer layer third strands 73, and the second outer layer third strands 83 are each 13 wires, which is half the number of the outermost layer first strands 61, then d62=0.81×d61, d63=1.165×d6 By using wire material as the basis for each strand 61, 62, 63, 71, 73, 81, 83, and 91 in which the relationships 1, d71 = 0.405 x d61, d73 = 0.58 x d61, d81 = 0.20 x d61, d83 = 0.57 x d61, and d91 = 0.181 x d61 are satisfied, the cross-sectional shape of the stranded conductor 14 can be made approximately circular with no compression or with a low compression rate.

[0127] The other structure is the same as that of the above-mentioned Example 9, so the description will be omitted.

[0128] In the tenth embodiment as well, the same effects as those in the ninth embodiment can be achieved.

[0129] [Example 11] The present embodiment 11 is an embodiment in which the innermost second outer layer third layer 80c of the second outer layer portion 80 of the stranded wire conductor 12 of the above-mentioned embodiment 8 is not provided. The second outer layer portion 80 of the stranded wire conductor 12 of the above-mentioned embodiment 8 is composed of three layers, namely, the second outer layer first layer 80a, the second outer layer second layer 80b, and the second outer layer third layer 80c, but it may also be composed of two layers, namely, the second outer layer first layer 80a and the second outer layer second layer 80b.

[0130] For example, as shown in FIG. 15, in the case of a stranded conductor 15 including 26 each of the outermost layer first strands 61, the outermost layer second strands 62, the first outer layer first strands 71, the first outer layer second strands 72, the second outer layer first strands 81, and the second outer layer second strands 82, and 13 each of the outermost layer third strands 63 and the first outer layer third strands 73, which is half the number of the outermost layer first strands 61, d62=0.81×d61, d63=1.165×d61, d By using wire material as the basis for each strand 61, 62, 63, 71, 72, 73, 81, 82, and 91, in which the relationships 71=0.405×d61, d72=0.325×d61, d73=0.465×d61, d81=0.16×d61, d82=0.13×d61, and d91=0.945×d61 are satisfied, the cross-sectional shape of the stranded conductor 15 can be made approximately circular with no compression or a low compression rate.

[0131] The other structure is the same as that of the eighth embodiment, and therefore the description will be omitted.

[0132] In this eleventh embodiment as well, the same effects as those in the eighth embodiment can be achieved.

[0133] [Example 12] In the above-mentioned Examples 1 to 11, the inner layer 50, 90 of the stranded conductor 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 is composed of a single center wire 51, 91, but it may be composed of multiple strands, or it may be an arrangement of multiple strands of any diameter or wire material composed of any material such as carbon fiber.

[0134] The other structures are the same as those in the above-mentioned embodiments 1 to 11, and therefore the description thereof will be omitted.

[0135] In this twelfth embodiment as well, the same effects as those of the first to eleventh embodiments can be achieved.

[0136] [Example 13] The stranded conductor 16 may be formed by arranging wire 95 made of any material, such as wire or carbon fiber, in a gap 94 formed by the circumferentially adjacent wires 21, 21 (61, 61) constituting the outermost layer 20a, 60a of the outermost layer 20, 60 in Examples 1 to 12 above, constituting the circumferentially adjacent wires 21, 21 (61, 61) and the layer one layer further inward, and formed by the circumferentially adjacent wires in total of four wires, as shown in FIG. 16 .

[0137] The other structures are the same as those in the above-mentioned Examples 1 to 12, and therefore the description thereof will be omitted.

[0138] In this thirteenth embodiment as well, the same effects as those in the first to twelfth embodiments can be achieved.

[0139] [Example 14] In the above embodiments 1 to 13, the inner layer portions 50, 90 are provided in the center portions of the stranded conductors 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15. However, the inner layer portions 50, 90 may not be provided, and a hollow portion 96 may be formed in the center portions of the stranded conductors 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 as shown in FIG. 17 to form the stranded conductor 17.

[0140] The other structures are the same as those in the above-mentioned embodiments 1 to 13, and therefore the description thereof will be omitted.

[0141] In this fourteenth embodiment as well, the same effects as those of the first to thirteenth embodiments can be achieved. [Explanation of symbols]

[0142] 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17 Stranded conductor 20,60 outermost layer 20a, 20b, 60a, 60b, 60c Layers constituting the outermost layer 21, 22, 61, 62, 63 Wires constituting the outermost layer 30,70 1st outer layer 30a, 30b, 70a, 70b, 70c Layers constituting the first outer layer portion 31, 32, 71, 72, 73 Wires constituting the first outer layer 40,80 2nd outer layer 40a, 40b, 80a, 80b, 80c Layers constituting the second outer layer 41, 42, 81, 82, 83 Wires constituting the second outer layer

Claims

1. A stranded conductor having at least an outermost layer portion and a first outer layer portion provided radially inside the outermost layer portion, The diameters of the wires constituting one layer in the outermost layer portion and the first outer layer portion are all the same, The outermost layer portion and the first outer layer portion are each composed of a plurality of layers, the number of wires constituting the outermost layer of the outermost layer section is the same as the number of wires constituting the outermost layer of the first outer layer section, the number of strands constituting the innermost layer of the outermost layer portion is half the number of strands constituting the outermost layer of the outermost layer portion, In the outermost layer portion and the first outer layer portion, the wires constituting one layer are disposed on the same circumference, and adjacent wires in the circumferential direction are disposed so as to abut on each other over the entire axial direction or over a part of the axial direction, a strand constituting a layer other than the layer located on the outermost side in the radial direction and one of the outermost layer portion and the first outer layer portion constitutes a layer located on the outer side of the one layer and abuts on an inner valley portion constituted by adjacent strands; A stranded conductor, characterized in that the diameter of each of the strands constituting the first outer layer portion is smaller than the diameter of each of the strands constituting the outermost layer portion.

2. an outermost layer portion, a first outer layer portion provided radially inward of the outermost layer portion, and a second outer layer portion provided radially inward of the first outer layer portion; the diameters of the wires constituting one layer in the outermost layer portion, the first outer layer portion, and the second outer layer portion are all the same; The second outer layer portion is composed of a plurality of layers, the number of wires constituting the outermost layer of the outermost layer section is the same as the number of wires constituting the outermost layer of the first outer layer section, and the number of wires constituting the outermost layer of the second outer layer section; the number of wires constituting the innermost layer of the first outer layer section is half the number of wires constituting the outermost layer of the outermost layer section, In the outermost layer portion, the first outer layer portion, and the second outer layer portion, the wires constituting one layer are disposed on the same circumference, and adjacent wires in the circumferential direction are disposed so as to abut on each other over the entire axial direction or over a part of the axial direction, a strand constituting a layer other than the layer located on the outermost side in the radial direction and among the outermost layer portion, the first outer layer portion, and the second outer layer portion constitutes a layer located one layer outside and abuts on an inner valley portion constituted by adjacent strands; 2. The stranded conductor according to claim 1, wherein a diameter of each of the strands constituting the second outer layer is smaller than a diameter of each of the strands constituting the first outer layer.

3. 2. The stranded conductor according to claim 1, characterized in that the number of strands constituting the innermost layer of the outermost layer portion is the same as the number of strands constituting the innermost layer of the first outer layer portion, and is half the number of strands constituting the outermost layer of the outermost layer portion.

4. 4. The stranded conductor according to claim 3, wherein the outermost layer and the first outer layer each include two layers.

5. The outermost layer portion and the first outer layer portion each include three layers, The number of wires constituting the outermost layer of the outermost layer portion is equal to that of the layer located inside thereof, 4. The stranded conductor according to claim 3, wherein the number of strands constituting the outermost layer of the first outer layer portion is the same as the number of strands constituting the layer located inside thereof.

6. The outermost layer portion is composed of three layers, and the first outer layer portion is composed of two layers, 4. The stranded conductor according to claim 3, wherein the number of strands constituting the outermost layer of the outermost layer is the same as that constituting the layer located inside thereof.

7. 3. The stranded conductor according to claim 2, characterized in that the number of strands constituting the innermost layer of the outermost layer portion, the number of strands constituting the innermost layer of the first outer layer portion, and the number of strands constituting the innermost layer of the second outer layer portion are the same, and are half the number of strands constituting the outermost layer of the outermost layer portion.

8. 8. The stranded conductor according to claim 7, wherein each of the outermost layer portion, the first outer layer portion, and the second outer layer portion is made up of two layers.

9. The outermost layer portion, the first outer layer portion, and the second outer layer portion each include three layers, The number of wires constituting the outermost layer of the outermost layer portion is equal to that of the layer located inside thereof, the number of wires constituting the outermost layer of the first outer layer portion is equal to the number of wires constituting the layer located inside thereof, 8. The stranded conductor according to claim 7, wherein the number of strands constituting the outermost layer of the second outer layer portion is the same as the number of strands constituting the layer located inside thereof.

10. The outermost layer portion is composed of three layers, and the first outer layer portion and the second outer layer portion are each composed of two layers, 8. The stranded conductor according to claim 7, wherein the number of strands constituting the outermost layer of the outermost layer is the same as that constituting the layer located inside thereof.

11. The outermost layer portion and the first outer layer portion are each composed of three layers, and the second outer layer portion is composed of two layers, The number of wires constituting the outermost layer of the outermost layer portion is equal to that of the layer located inside thereof, 8. The stranded conductor according to claim 7, wherein the number of strands constituting the outermost layer of the first outer layer portion is the same as the number of strands constituting the layer located inside thereof.

Images