JP6335981B2 - Stranded conductor - Google Patents

Description

  The present invention relates to a stranded conductor.

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

  For example, as shown in FIG. 8, a stranded wire conductor composed of 19 strands generally has a single strand 102 at the center of the stranded wire conductor 101 as a core and 6 strands around it. The strand 103 is covered to form an inner layer, and the outer periphery is covered with 12 strands 104 to form an outer layer, which is twisted in the same direction.

  Since the strands 102, 103, 104 are all circular in cross section and have the same diameter, when the strands 102, 103, 104 are arranged in a standard core wire arrangement to form the stranded conductor 101, the outer peripheral shape thereof As shown in FIG. 8, the shape approximates a hexagonal shape and does not approximate a round shape. Hereinafter, this is referred to as Prior Art 1.

  As shown in FIG. 8, the stranded conductor 101 is generally used as an electric wire or the like (covered wire) 107 after an outer peripheral portion is covered with an insulating material 106. The cross-sectional shape of the covered wire is desired to be a substantially perfect circle shape. On the other hand, it is desirable that the insulating material 106 is coated substantially uniformly on the outer periphery of the stranded wire conductor 101 in terms of pressure resistance. Therefore, the cross-sectional shape of the stranded wire conductor is desired to be a perfect circle.

  Further, the reduction in the amount of the insulating material 106 containing petroleum as a main component is very important from the viewpoint of effective use of resources, and a reduction in the diameter of the stranded wire conductor is required.

  However, if the cross-sectional shape of the stranded wire conductor 101 is a hexagon and the cross-sectional shape of the covered wire 107 is a perfect circle, the cross-sectional shape of the stranded wire conductor 101 is the insulating material 106 positioned near the apex of the hexagon. The thickness is small and increases from the apex to the side of the hexagon, resulting in a problem that the thickness of the insulating material 106 is not uniform. Further, in order to prevent a breakdown voltage failure, it is necessary to secure a certain thickness or more for the insulating material 106 located at the apex of the hexagon. Therefore, the covered wire 107 cannot be made thinner than the diameter from the center of the stranded wire conductor 101 to its outermost end, and there is a problem that there is a limit to reducing the diameter and weight of the covered wire.

  In addition, the insulating material 106 located on the side is excessive from the viewpoint of performance, but is necessary to make the cross section a perfect circle, so that there is a problem that the amount of the insulating material 106 is reduced. is there.

  Moreover, when the cross-sectional shape of the stranded wire conductor 101 is a hexagon, there is a problem that the stranded wire conductor 101 may be damaged when the covering material 106 is stripped when the coated wire is subjected to terminal processing.

  The above problem can be solved by setting the cross-sectional shape of the stranded wire conductor to a substantially perfect circle.

  As a means for solving this problem, as shown in FIG. 9, for example, as shown in FIG. 9, as shown in FIG. 9, a strand 202 having a circular cross section and having the same diameter is passed through a compression die while twisting in one direction. A method has been proposed in which the cross-sectional shape of the line conductor 201 is a substantially perfect circle. Hereinafter, this is referred to as Conventional Technology 2.

Japanese Patent Laid-Open No. 11-25758

  In the stranded wire conductor 201 of the above-described prior art 2, when the strand 202 is passed through a compression die, the outer layer strand is compressed and deformed, so that physical properties such as stretch characteristics, flexibility, and flexibility are impaired. There is a problem.

  Further, the twisted conductor 201 of the prior art 2 needs to pass a compression die while twisting in one direction. Therefore, an extra compression die is required as compared with the twisted conductor 101 of the prior art 1, and this compression Since the die is worn and damaged when the stranded wire conductor 201 is manufactured, there is a problem that periodic replacement is necessary and the cost becomes high.

  Moreover, in order to make the twisted wire after compression substantially circular, it is necessary to set the rotational speed of the production machine (twisting machine) to a certain value or less and to stabilize the rotational speed. There is also a problem that the production efficiency is worse than that of the stranded conductor 101.

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

In order to solve the above problems, the invention according to claim 1 is a stranded conductor having an outer layer composed of a plurality of large-diameter wires, a plurality of medium-diameter wires, and a plurality of thin-diameter wires,
Two medium-diameter wires are arranged in the circumferential direction between adjacent large-diameter wires,
Two thin wires are arranged in the circumferential direction between adjacent large wires,
In the medium diameter wire, a thin wire is disposed on the inner side in the radial direction of the stranded wire conductor,
The diameter of the thin wire is smaller than the diameter of the medium wire, and the diameter of the medium wire is smaller than the diameter of the thick wire.

The invention according to claim 2 is the invention according to claim 1, wherein an inner layer is arranged inside the outer layer,
In the inner layer, the outermost strand is located inside the valley between the adjacent large-diameter wires.

  The invention according to claim 3 is characterized in that, in the invention according to claim 1, the diameter of the thick wire is set equal to the sum of the diameter of the medium wire and the diameter of the thin wire. Is.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the distance from the center of the stranded conductor to the outermost edge of the medium diameter wire constituting the outer layer, The distance from the center to the outermost edge of the thick wire constituting the outer layer is the same.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the number of the large-diameter wires is three or more.

  According to the present invention, it has an outer layer composed of a plurality of large-diameter wires, medium-diameter wires, and thin-diameter wires, and two medium-diameter wires and two thin-diameter wires between adjacent large-diameter wires. In addition to the arrangement, the thin wire is disposed on the inner side in the radial direction of the medium wire, so that the cross-sectional shape of the stranded wire conductor is a substantially perfect circle, and the strands constituting the stranded wire conductor are adjacent to each other. All the strands can be brought into contact with each other, and the stranded wire conductor can be reduced in diameter, weight, and flexibility.

  In addition, the stranded wire conductor of the present invention, like the stranded wire conductor 201 of the prior art 2, can make the outer shape of the stranded wire conductor into a substantially perfect circle shape without passing the strand through a compression die. It can maintain the physical characteristics of the strands without damaging the physical characteristics such as stretch characteristics, flexibility, flexibility, etc., and can obtain highly reliable quality. It can be effectively used in fields.

The cross-sectional view of the stranded wire conductor which concerns on Example 1 of this invention. The cross-sectional view which shows an example of the stranded wire conductor which concerns on Example 3 of this invention. The cross-sectional view which shows the other examples of the twisted wire conductor which concerns on Example 3 of this invention. The cross-sectional view which shows an example of the stranded wire conductor which concerns on Example 4 of this invention. The cross-sectional view which shows the other examples of the stranded wire conductor which concerns on Example 4 of this invention. The cross-sectional view which shows an example of the stranded wire conductor which concerns on Example 5 of this invention. The cross-sectional view which shows the other examples of the stranded wire conductor which concerns on Example 5 of this invention. The cross-sectional view of the stranded wire conductor of the prior art 1. FIG. The cross-sectional view of the stranded wire conductor of the prior art 2. FIG.

  An embodiment for carrying out the present invention will be described with reference to the drawings.

[Example 1]
FIG. 1 is a cross-sectional view cut in a direction orthogonal to the axial direction of the stranded conductor 1 according to the first embodiment of the present invention, and the oblique lines indicating the cross-section of each strand are omitted in order to avoid complexity of the figure. did.

  The stranded wire conductor 1 has an inner layer 2 and an outer layer 3 provided outside the inner layer 2. The inner layer 2 includes one center line (element wire) 10 and six first inner layer lines 11 arranged so as to surround the center line 10, and the first inner layer line 11 is the most in the inner layer 2. Corresponds to the strand located outside.

  As shown in FIG. 1, the outer layer 3 is composed of six large-diameter wires (element wires) 12, twelve medium-diameter wires (element wires) 13, and twelve thin-diameter wires (element wires) 14. The inner layer 2 is covered with 30 strands 12, 13, and 14.

  The large-diameter wire 12 is arranged with an appropriate interval in the circumferential direction, and the two small-diameter wires 14 and 14 are arranged around the inner portion between the large-diameter wire 12 and the large-diameter wire 12 adjacent to each other in the circumferential direction. Two medium-diameter wires 13 and 13 are arranged in the circumferential direction on the outer side between the large-diameter wire 12 and the large-diameter wire 12 that are arranged in the direction and adjacent to each other in the circumferential direction. The medium diameter wire 13 is provided so that the thin wire 14 is located inside the stranded wire conductor 1 in the radial direction.

  Each first inner layer wire 11 constituting the inner layer 2 is in contact with the center line 10 located on the inner side of the inner layer 2, and two large-diameter lines 12, 12 located on the outer side of the first inner layer wire 11, and two The small diameter wires 14 and 14 are in contact with each other.

  Each large-diameter wire 12 constituting the outer layer 3 includes two first inner-layer wires 11, 11 constituting the inner layer 2 located inside thereof, and two fine wires located on both sides in the circumferential direction of the large-diameter wire 12. The diameter wires 14 and 14 are in contact with the two medium diameter wires 13 and 13.

  The medium-diameter wire 13 constituting the outer layer 3 comes into contact with the thin-diameter wire 14 located on the inner side, the large-diameter wire 12 located on both sides in the circumferential direction of the medium-diameter wire 13, and the medium-diameter wire 13. Yes.

  The thin wire 14 constituting the outer layer 3 is divided into a first inner wire 11 constituting the inner layer 2 located inside thereof, a thick wire 12 and a thin wire 14 located on both sides in the circumferential direction of the thin wire 14. While abutting, it abuts on the medium diameter wire 13 located outside the small diameter wire 14.

  As wire rods that form the basis of each of the strands 10, 11, 12, 13, 14, copper wires such as bare copper wire, oxygen-free copper wire, linear crystal oxygen-free copper wire, single crystal high-purity oxygen-free copper wire, A copper wire plated with tin, nickel, silver or the like, an aluminum wire, various alloy wires, an enameled wire, a litz wire, a formal wire, or the like can be used. The same material may be used for the material of each strand 10, 11, 12, 13, 14 and a different material may be used.

  The diameter d1 of the center line 10 is set to be the same as the diameter d2 of the first inner layer line 11. The diameter d3 of the large diameter wire 12 is set larger than the diameter d4 of the medium diameter wire 13, and the diameter d4 of the medium diameter wire 13 is set larger than the diameter d5 of the thin diameter wire 14. Further, the diameter d2 of the first inner layer wire 11 is set to be larger than the diameter d4 of the medium diameter wire 13 and smaller than the diameter d3 of the thick wire 12.

  In the first embodiment, the strands 10, 11, 12, 13, 1 that satisfy the relationship of d1 = d2 = 0.909 × d3, d4 = 0.594 × d3, and d5 = 0.318 × d3 are used. It was.

  Further, the cross-sectional shape of the stranded wire conductor 1 is substantially circular, that is, the distance L1 from the center A of the center line 10 to the outermost edge B of the large-diameter wire 12, and the center wire 10 to the medium-diameter wire The distance L2 to 13 outermost edge C is formed so that it may become the same.

  Since the stranded wire conductor 1 of the present invention has the above-described structure, the following actions and effects are exhibited.

  Since the cross-sectional shape of the stranded wire conductor 1 is a substantially perfect circle, and the strands 10, 11, 12, 13, and 14 can abut on all the strands 10, 11, 12, 13, and 14 that are adjacent to each other. In addition, the twisted form can be stabilized and the conductor density of the stranded wire conductor 1 can be increased, and the diameter, weight, and flexibility of the stranded wire conductor 1 can be improved.

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

  Further, the stranded wire conductor 1 can have a substantially perfect circular shape as the stranded wire conductor 1 does not pass through a compression die, unlike the stranded wire conductor 201 of the prior art 2. The physical properties such as flexibility and flexibility are not impaired, the physical properties of the strands can be maintained, and the reliable quality can be obtained. It can be effectively used in

[Example 2]
In the strand constituting the stranded conductor 1 of Example 1, the diameter d3 of the wire that is the basis of the thick wire 12 is larger than the diameter d4 of the wire that is the basis of the medium wire 13, and If the strands 10, 11, 12, 13, and 14 and the stranded wire conductor 1 are configured using a wire having a diameter d4 that is larger than the diameter d5 of the wire that is the base of the thin wire 14, In addition to the strands having the diameters described in the first embodiment, the stranded wire conductor 1 can be configured using any strands. Further, the outer layer 3 may be compressed from the outer peripheral portion with a compression die or the like.

  By this compression, the outer peripheral portions of the wires 12 and 13 forming the outer layer 3 are compressed and deformed, and the outer shape of the stranded conductor can be made closer to a perfect circle. Compression with a compression die or the like may be performed when the stranded wire conductor 1 is manufactured, or may be performed after the stranded wire conductor 1 is manufactured. The compression rate is arbitrarily set. Since other structures are the same as those of the first embodiment, description thereof is omitted.

  Also in the second embodiment, the same operational effects as those of the first embodiment can be exhibited.

[Example 3]
In Examples 1 and 2, the number of the large diameter wires 12 constituting the outer layer 3 and the number of the medium diameter wires 13 and the thin diameter wires 14 are set to 12, respectively. The number of lines 14 can be set to any number as long as it is twice the number of large diameter lines 12 and the number of large diameter lines 12 is three or more.

  For example, as shown in FIG. 2, the number of first inner layer wires 11 constituting the inner layer 2 and seven large diameter wires 12 constituting the outer layer 3 and the number of medium diameter wires 13 and thin diameter wires 14 constituting the outer layer 3 are set. In the case of the 14 twisted wire conductors 21, the strands 10 satisfying the relationships of d1 = 1.305 × d3, d2 = d3, d4 = 0.465 × d3, d5 = 0.320 × d3. , 11, 12, 13, and 14 so that the cross-sectional shape of the stranded wire conductor 21 is substantially circular with no compression or a low compression rate, and all the strands 10, 11, 12, 13, 14 can come into contact with all adjacent strands 10, 11, 12, 13, 14.

  For example, as shown in FIG. 3, the number of first inner layer wires 11 constituting the inner layer 2 and eight large diameter wires 12 constituting the outer layer 3, and the number of medium diameter wires 13 and small diameter wires 14 constituting the outer layer 3. In the case of 16 stranded conductors 22 each having the following relationship: d1 = 1.661 × d3, d2 = 1.007 × d3, d4 = 0.450 × d3, d5 = 0.314 × d3 By using the wire that is the basis of each of the strands 10, 11, 12, 13, and 14, the cross-sectional shape of the stranded wire conductor 22 is made into a substantially perfect circle shape with no compression or a low compression rate, and all the strands The wires 10, 11, 12, 13, 14 can abut all the adjacent wires 10, 11, 12, 13, 14.

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

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

  In the third embodiment, since the outer layer 3 can be constituted by three or more large-diameter wires 12, medium-diameter wires 13, and thin-diameter wires 14, when designing the stranded wire conductors 1, 2, 22 Therefore, the present invention can be applied to a device that requires a wide conductor area from a small-diameter stranded wire conductor to a large-diameter stranded wire conductor.

[Example 4]
In the first to third embodiments, the inner layer 2 is composed of the first inner layer wires 11 having the same number as the center line 10 and the large diameter wire 12, but the inner layer is composed of a plurality of strands. For example, the kind of the wire may be composed of one kind or a plurality of kinds having different diameters. In addition, as an element wire forming the inner layer, a copper wire, a copper wire plated with tin, nickel, silver, etc., an aluminum wire, various alloy wires, an enameled wire, a formal wire, etc. Etc., and the same material as the strands forming the outer layer may be used, or a different material may be used. For example, as shown in FIG. 4, the inner layer 32 is constituted by the three first inner layer wires 31, the number of the three large diameter wires 12, the six medium diameter wires 13, and the six small diameters. The outer layer 3 may be constituted by the wire 14 to form the stranded wire conductor 33.

  Further, as shown in FIG. 5, the outer layer 3 is composed of six large-diameter wires 12 constituting the outer layer 3 and twelve medium-diameter wires 13 and fine-diameter wires 14 respectively. The center line 41 and six first strands 42 having the same diameter as the center line 41 are disposed so as to cover the center line 41, and the valleys of the first strands 42 and 42 adjacent in the circumferential direction are arranged. The inner layer 45 may be formed by arranging one second strand 43 on the outside, for a total of six, and may be a stranded conductor 46.

  As described above, the number of strands constituting the outermost layer of the inner layer can be set to an arbitrary number as long as it is a plurality other than the same number as the thick wire 12.

  Since the other structure is the same as that of the said Examples 1-3, description is abbreviate | omitted.

  Also in the present Example 4, the same effect as the said Examples 1-3 can be exhibited.

[Example 5]
In the said Examples 1-4, although the inner layers 2, 32, and 45 were comprised with the some strand, it comprised by one strand, for example, the twisted conductor 51 as shown in FIG. 6, FIG. , 52, and the wire may be made of the same material as the wire forming the outer layer or may be made of a different material. The diameter d3 of the large diameter wire 12 is preferably set to be substantially the same as the sum of the diameter d4 of the medium diameter wire 13 and the diameter d5 of the thin diameter wire 14.

  For example, as shown in FIG. 6, a twist composed of a center line 50 having one diameter d 1, three large-diameter wires 12, six medium-diameter wires 13, and six thin-diameter wires 14. In the case of the line conductor 51, it becomes a base of the respective strands 10, 12, 13, and 14 in which the relationship of d1 = 0.952 × d3, d4 = 0.630 × d3, d5 = 0.363 × d3 is established. By using the wire rod, the cross-sectional shape of the stranded conductor 51 is made into a substantially perfect circle shape with no compression or a low compression ratio, and all the strands 10, 12, 13, 14 adjacent to each other, 12, 13, 14 can be contacted.

  Since the other structure is the same as that of the said Examples 1-4, description is abbreviate | omitted.

  Also in the present Example 5, the effect similar to the said Examples 1-4 can be exhibited.

1, 2, 22, 33, 46, 51, 52 Twisted wire conductor 2, 32, 45 Inner layer 3 Outer layer 12 Large diameter wire 13 Medium diameter wire 14 Small diameter wire

Claims (5)

A stranded wire conductor having an outer layer composed of a plurality of thick wires, a plurality of medium wires, and a plurality of thin wires,
Two medium-diameter wires are arranged in the circumferential direction between adjacent large-diameter wires,
Two thin wires are arranged in the circumferential direction between adjacent large wires,
In the medium diameter wire, a thin wire is disposed on the inner side in the radial direction of the stranded wire conductor,
The diameter of the said thin diameter wire is smaller than the diameter of the said medium diameter wire, The diameter of the said medium diameter wire is made smaller than the diameter of the said large diameter wire, The twisted wire conductor characterized by the above-mentioned. An inner layer is disposed inside the outer layer,
The strand wire conductor according to claim 1, wherein the outermost strand in the inner layer is located inside a valley portion between the adjacent large diameter wires.   The stranded wire conductor according to claim 1, wherein the diameter of the thick wire is set to be the same as the sum of the diameter of the medium wire and the diameter of the thin wire.   The distance from the center of the stranded conductor to the outermost edge of the medium diameter wire constituting the outer layer is the same as the distance from the center to the outermost edge of the thick wire constituting the outer layer. The stranded wire conductor according to any one of claims 1 to 3, wherein   The stranded wire conductor according to any one of claims 1 to 4, wherein the number of the large-diameter wires is three or more.

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