JP2009054410A - Twisted conductor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a twisted conductor having thirty seven wires of which the contour shape can be made almost circular by compression-processing the wires at a low compression rate, or not compression-processing the wires. <P>SOLUTION: In the twisted conductor 1 having thirty seven wires, a wire of a single strand is used as a center wire 11 and the center wire 11 of a single strand is surrounded by six wires to form a first layer 12. The outer periphery of the first layer 12 is surrounded by twelve wires to form a second layer 13. The outer periphery of the second layer 13 is surrounded by eighteen wires to form an outermost layer 14. Diameters of wire materials of the twelve wires among the eighteen wires constituting the outermost layer 14 and the six wires among the twelve wires constituting the second layer 13 are identical with those of the center wire 11 and the wires constituting the first layer 12. Diameters of wire materials of the six wires other than those constituting the outer most layer 14 and the six wires other than the those constituting the second layer 13 are set to be smaller than those of the center wire 11 and the wires constituting the first layer 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stranded wire conductor, and more particularly, to a stranded wire conductor constituted by a 37-core concentric stranded arrangement used for electric wires and the like.

  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, an aluminum wire, and various alloy wires are used.

  In addition, as shown in FIG. 7, a stranded conductor composed of 37 cores generally has a center line 102 in which one core 101 is arranged at the center and 6 cores around the center line 102. A first layer 103 formed by surrounding the first strand 101, a second layer 104 formed by surrounding the outer periphery of the first layer 103, and an outer periphery of the second layer 104. The stranded wire conductor 100 is constituted by a third layer (outermost layer) 105 formed by covering 18 strands 101. Moreover, the twisted wire conductor 100 is manufactured by twisting the wire which forms the strand 101 in the same direction with a twisting machine.

  Since each of the strands 101 has a circular cross section and is formed from a wire having the same diameter, the outer shape of the cross section of the 37-core concentric strand arrangement stranded conductor 100 constituted by the strands 101 is used. As shown in FIG. 7, the shape approximates a hexagonal shape and does not approximate a round shape. Hereinafter, the above-described stranded wire conductor 100 is referred to as Conventional Technology 1.

  Moreover, the said stranded wire conductor 100 is generally used for an electric wire etc. as a covered wire which coat | covered the insulating material 110 on the outer peripheral part, as shown in FIG. The outer shape of the covered wire is desired to be a substantially perfect circle. On the other hand, it is desirable that the insulating material 110 is coated on the outer peripheral portion of the stranded wire conductor 101 with a substantially uniform thickness in terms of pressure resistance characteristics. Therefore, it is desired that the outer shape of the stranded wire conductor is a perfect circle.

  Further, the reduction in the amount of the insulating material 110 mainly composed of petroleum is very important from the viewpoint of effective use of resources, and the stranded wire conductor is required to be reduced in diameter and rounded.

  However, if the outer shape of the stranded wire conductor 100 is a hexagon and the outer shape of the coated wire is a perfect circle as described above, the outer shape of the stranded wire conductor 100 is the apex of the hexagon as shown in FIG. The thickness of the insulating material 110 located in the vicinity of the portion is thin, and becomes thicker as it reaches the center of the hexagonal side portion, resulting in a problem that the thickness of the insulating material 110 becomes non-uniform. Further, in order to prevent a breakdown voltage failure, it is necessary to secure a certain thickness or more for the insulating material 110 located at the apex of the hexagon. Therefore, the coated wire cannot be made thinner than the diameter from the center of the stranded wire conductor 100 to its apex, and there is a problem that there is a limit to reducing the diameter and weight of the coated wire.

  In addition, the thickness of the insulating material 110 located on the side of the hexagon is excessive from the viewpoint of performance, but is necessary to make the cross section a perfect circle. There is a problem that a limit arises.

  In addition, when the outer shape of the stranded wire conductor 100 is a hexagon, there is a problem that the stranded wire conductor 101 may be damaged when the covering material 110 is stripped when the coated wire is subjected to terminal processing.

The above problem can be solved by making the outer shape of the stranded conductor into a substantially perfect circle.
As a means for solving this problem, as described in Patent Document 1, all wires having the same cross-section and the same diameter are passed through a compression die while being twisted in one direction. There has been proposed a method in which the outer surface 203 of the outer layer wire 202 is deformed under pressure so that the outer shape of the stranded conductor 201 becomes a substantially perfect circle. Hereinafter, the stranded wire conductor 201 is referred to as Conventional Technology 2.
JP 2000-057852 A

  In the above-described stranded wire conductor 201 of the prior art 2, in order to make the outer shape substantially circular, a compression ratio of 4% or more ((1−inner diameter of compression die / outer diameter when wire rods are gathered) × 100) is required. As described above, when the outer layer wire 202 is deformed at a high compression rate, there is a problem that physical properties such as stretch characteristics, flexibility, and flexibility of the stranded conductor 201 are impaired.

  Accordingly, the present invention provides a stranded wire composed of 37 strands, the strand being compressed at a lower compressibility than the stranded wire conductor of the prior art 2, or without being compressed. An object of the present invention is to provide a stranded wire conductor capable of making the outer shape of the conductor into a substantially perfect circle.

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a single core wire is a center line, and a six-core wire surrounds the center line to form a first layer, A 37-core stranded conductor in which the outer periphery of the first layer is surrounded by 12 cores to form a second layer, and the outer periphery of the second layer is surrounded by 18 cores to form the outermost layer. There,
The diameter of the wire used as the basis of 12 strands of the 18 cores constituting the outermost layer, and the diameter of the wire used as the basis of 6 strands of the 12 cores constituting the second layer , Set to be the same as the diameter of the wire that is the basis of the wire constituting the center line and the first layer,
The diameter of the wire used as the basis of the other 6 cores of the 18 cores constituting the outermost layer and the base of the other 6 cores of the 12 cores constituting the second layer The diameter of the wire is set to be smaller than the diameter of the wire that is the basis of the wire forming the center line and the first layer.

According to a second aspect of the present invention, in the first aspect of the present invention, the second layer is formed of a wire formed of a wire having a diameter smaller than the diameter of the wire that is the basis of the center line, and the center line. The strands formed from the wire having the same diameter as the diameter of the base wire are arranged alternately in the circumferential direction.
The outermost layer is formed at the apex of the strands formed from the wire having a diameter smaller than the diameter of the wire that is the basis of the center line, and the second layer is formed. It is characterized by arranging the strands formed from the wire having a diameter smaller than the diameter of the base wire.

The invention according to claim 3 is the invention according to claim 2, wherein the outermost layer is formed from the center point of the center line, and the diameter of the wire is smaller than the diameter of the wire that is the basis of the center line. The distance to the edge of the formed strand,
The distance from the center point of the center line to the outermost edge of the element wire formed from the wire having the same diameter as the diameter of the wire that is the basis of the center line, constituting the outermost layer,
It is characterized by being identical.

The invention according to claim 4 is the wire according to any one of claims 1 to 3, wherein the wire is used as a base of the element wire constituting the outermost layer and is used as a base of the center line. The diameter of the wire having a diameter smaller than the diameter;
The wire that is the basis of the strands constituting the second layer, and the diameter of the wire that has a smaller diameter than the diameter of the wire that is the basis of the center line,
It is characterized by being identical.

The invention according to claim 5 is the wire according to any one of claims 1 to 3, wherein the wire is used as a base of the strands constituting the outermost layer and is used as a base of the center line. The diameter of the wire having a diameter smaller than the diameter,
It is characterized in that it is made smaller than the diameter of a wire that is a base of the element wire constituting the second layer and has a diameter smaller than the diameter of the wire that becomes the base of the center line.

  A sixth aspect of the invention is characterized in that, in the invention according to any one of the first to fifth aspects, the outermost layer is formed by compression deformation.

  According to the present invention, the outer shape of the stranded wire conductor can be made into a substantially perfect circle shape without being compressed and deformed or at a compression rate lower than that of the prior art 2.

Moreover, the maximum outer diameter can be made thinner than the stranded wire conductors 100 and 201 of the prior arts 1 and 2.
As described above, the outer shape of the stranded wire conductor is a substantially circular shape and, as described above, can be made thinner than the stranded wire conductors 100 and 201 of the prior arts 1 and 2, thereby reducing the coating thickness of the insulating material. The entire circumference can be made thin and can be made substantially uniform, the amount of insulating material can be reduced, and the cost can be reduced.

  According to the third aspect of the present invention, the outer shape of the stranded wire conductor can be made closer to a perfect circle than the stranded wire conductor 100 of the prior art 1 without compressing the wire.

  Further, even in the case of compressive deformation, the outer shape can be made into a substantially perfect circle shape with a lower compression rate than the stranded wire conductor 201 of the prior art 2, so that the wire has a stretch characteristic, flexibility, flexibility, etc. Therefore, the physical properties of the strands can be kept high, and a highly reliable quality can be obtained.

  In addition, according to the invention described in claim 4, since it can be manufactured with fewer types of wire than the invention described in claim 5, the manufacturing cost can be kept low.

  According to the fifth aspect of the present invention, the wire rod is not passed through the compression die as in the stranded wire conductor 201 of the prior art 2, that is, the outer layer strand is not compressed and deformed. Since the outer shape can be made into a substantially circular shape, the physical properties of the wire can be maintained without damaging the physical properties such as the expansion characteristics, flexibility, and flexibility of the wire, and the reliability High quality can be obtained.

  In addition, since a compression die is not required, the production machine (twisting machine) does not need to have a rotation speed lower than a certain value and does not need to be stabilized, compared to those that require a compression die. Efficiency can be increased.

  The best mode for carrying out the present invention will be described with reference to FIGS.

1 to 4 show a first embodiment of the present invention.
FIG. 1 is a schematic cross-sectional view cut in a direction orthogonal to the axial direction of the stranded wire conductor 1, and is a schematic view when the cross-sectional shape of the wire that is the basis of each strand is the same as the cross-sectional shape of the strand. . In addition, the oblique line which shows the cross section of each strand was abbreviate | omitted in order to avoid the complexity of a figure.

  As shown in FIG. 1, the stranded wire conductor 1 shown in Example 1 is composed of a total of 37 strands, and the strands are composed of a large diameter wire (element wire) 2 and a large diameter wire 2. It is composed of two types of thin wires (element wires) 3 having a small diameter.

  The stranded wire conductor 1 includes a center line 11 formed by a single large-diameter wire 2 located at the center, and a six-core large-diameter wire 2 disposed so as to surround the outer periphery of the center line 11. And a total of 12 cores formed of 6 cores of the large diameter wire 2 and 6 cores of the thin wire 3 disposed so as to surround the outer periphery of the first layer 12. A third layer (outermost layer) formed by two layers 13 and a total of 18 cores composed of 12 cores of large diameter wires 2 and 6 cores of thin wire 3 arranged so as to surround the outer periphery of the second layer 13. 14).

  In addition, the said strands 2 and 3 are formed based on the cross-section circular (round shape) wire 2a, 3a (refer FIG. 3). As these wires 2a and 3a, copper wires, copper wires plated with tin, nickel, silver, aluminum wires, and various alloy wires can be used as in the prior art.

  As shown in FIG. 1, each large diameter line 2 forming the first layer 12 is located at the same distance from the center A of the center line 11 and the large diameter line 2 forming the adjacent first layer 12. Are arranged so as to make point contact with each other and the center line 11. This contact is a point contact in the cross section of FIG. 1 and a line contact in the axial direction.

  Each of the six cores of the large diameter wire 2 forming the second layer 13 enters each valley 16 formed between the outer peripheral surfaces of the adjacent large diameter wires 2 and 2 in the first layer 12. And it arrange | positions so that the at least single core large diameter line 2 which forms the 1st layer 12 may be point-contacted. A single thin wire 3 is disposed between the thick wire 2 and the thick wire 2 adjacent to each other in the circumferential direction of the second layer 13 as shown in FIG. That is, the thick wire 2 and the thin wire 3 are alternately arranged in the circumferential direction of the second layer 13.

  The six thin wires 3 forming the outermost layer 14 are respectively apexes of the thin wires 3 forming the second layer, that is, the center A of the center line 11 and the thin wires forming the second layer. 3 is arranged such that the center of the thin wire 3 that forms the outermost layer 14 is located on the extension line of the line connecting the centers of the three or in the vicinity thereof. Then, between the thin wire 3 and the thin wire 3 adjacent to each other in the circumferential direction of the outermost layer 14, as shown in FIG. That is, in the circumferential direction of the outermost layer 14, two large-diameter wires 2 and 2 are arranged between the thin-diameter wires 3 and 3.

  With the above-described configuration, the outer shape of the stranded wire conductor 1 is closer to a substantially circular shape than the stranded wire conductor 100 of the prior art 1. That is, the distance L1 from the center A of the center line 11 to the outermost edge B of the thin wire 3 forming the outermost layer 14, and the outermost edge of the thick wire 2 forming the outermost layer from the center A of the center line 11 The distance L2 to C is formed to be substantially the same. That is, the outermost edge ends B and C of all the large diameter wires 2 and the thin diameter wires 3 that form the outermost layer 14 are the outermost edge ends of the thin diameter wire 3 from the center A of the center line 11 as shown in FIG. It is formed so as to be located at a position close to a perfect circle having a radius L1 to B.

  Next, in the stranded wire conductor 1, the distance L1 from the center A of the center line 11 to the outermost edge B of the thin wire 3 forming the outermost layer 14 and the outermost layer 14 from the center A of the center line 11 are formed. The relationship that the distance L2 to the outermost edge C of the large diameter wire 2 is substantially the same will be described.

Thick diameter line 2, a thin line 3, each of the group to become the wire 2a, a 3a is a cross-sectional shape is a true circle of each same shape, the diameter of the thick diameter line 2 (wires 2a) and d _1, fine diameter line 3 the diameter of the (wire 3a) and _{d 2.}

The distance L1 from the center A of the center line 11 to the outermost edge B of the thin wire 3 forming the outermost layer 14 is:
_{L1 = d 1/2 + d} 1 + d 2 + d 2 ··· (1)
It becomes.

The stranded conductor 1 of the first embodiment includes a six-core wire 106 that forms a hexagonal apex portion of the outermost layer 105 in the stranded conductor 100 of the prior art 1 (FIG. 7), and the six-core element. the second layer 6 hearts strands 108 forming a located on a line connecting the center a ₁ line 106 and center line 102 is replaced with a different strand of the other strand and diameter.

Therefore, the distance L3 from the center _{A 1} of the center line 102 in the stranded conductor 100 of the prior art 1 to the most outer edge C1 of the wire 107 of the side portion adjacent to the apex portion of the wire 106 forming the outermost layer 105 The distance L2 from the center A of the center line 11 to the outermost edge C of the thick wire 2 forming the outermost layer 14 in the stranded conductor 1 of the first embodiment is the strand of the stranded conductor 100 of the prior art 1 And the diameter d _{1 of the} large-diameter wire 2 of the first embodiment are the same.

In FIG. 7, the contact point between the adjacent strands 107 and 107 is D, the distance from the center A ₁ of the center line 102 to the point D is x, the center of the strand 107 is E, and the line A ₁ If the angle formed by D and the line A ₁ E is θ,
_{L3 = L2 = A 1 E +} d 1/2
= X × secθ + d _1/2 (2)
It becomes.

Further, if the center of the wire 106 at the apex is F,
cos30 ° = A ₁ D / A ₁ F
= X / (3 × d ₁ )
From the above, x = 3d ₁ · cos 30 ° (3)
Also, tan θ = DE / A ₁ D
_{= (D 1/2) /} x ··· (4)
From equations (3) and (4), θ = 10.893339 ° (5)
From equations (2), (3), and (5), L2 = 3.14575d ₁ (6)
It becomes.

Therefore, L1 = L2 is
From equations (1) and (6),
d ₂ = 0.822875d ₁ (7)
The following relational expression is obtained, and the stranded wire conductor 1 of Example 1 is configured using the large diameter wire 2 and the small diameter wire 3 in which such a relationship is established, whereby the outermost layer 14 from the center A of the center line 11 is obtained. And the distance L2 from the center A of the center line 11 to the outermost edge C of the thick wire 2 forming the outermost layer may be substantially the same. it can.

The outer diameter D1 of the stranded conductor 1 of the first embodiment, since it is D1 = 2 × L1, the equation _{(1) D1 = 2 × (} d 1/2 + d 1 + d 2 + d 2) ··· ( 8)
When formula (7) is introduced into formula (8), D1 = 6.2915 × d ₁ (9)
It becomes.

On the other hand, in the prior art 1, the maximum outer diameter D2 of the stranded conductor 100 when the diameter of the wires was assumed d _1, as is apparent from FIG. 7,
D2 = 7 × d ₁ (10)
It is.

The outer diameter D3 of the stranded conductor 201 of the prior art 2, the diameter of the wires (wire) at d _1, and the best compression ratio in 3% (stranded conductor 201 in diameter ratio of compression ratio )
D3 = 7 × d ₁ × (1-3 / 100) = 6.79 × d ₁ (11)
It is.

  Therefore, D1 <D3 <D2, and it can be seen that the maximum outer diameter of the stranded wire conductor 1 of Example 1 can be made smaller than that of the stranded wire conductors 100 and 201 of the prior arts 1 and 2.

However, assuming that the strands of the prior arts 1 and ₂ are d ₂ as described above, the stranded wire conductor 1 of the first embodiment and the stranded wire conductors 101 and 201 of the prior art 1 and 2 have different conductor cross-sectional areas. .

  Therefore, next, the outer diameter D1 ′ of the stranded wire conductors 1, 100, 201 when the conductor cross-sectional areas of the stranded wire conductor 1 of the first embodiment and the stranded wire conductors 100, 201 of the prior art 1 and 2 are the same. , D2 ′ and D3 ′ are compared.

The cross-sectional area S1 of the stranded conductor 1 of Example 1 is
S1 = (π / 4 × d ₁ ² × 25) + (π / 4 × d ₂ ² × 12) (12)
When formula (7) is introduced into formula (12),
S1 = 26.001675 × d ₁ ² (13)
It becomes.

On the other hand, when the wire of stranded conductor 100 of the prior art 1 the diameter (wire) and _{d 3,} the cross-sectional area S2 of the stranded conductor 100,
S2 = π / 4 × d ₃ ² × 37
= 29.0598 × d ₃ ² (14)
It becomes.

The conductor cross-sectional area of the stranded wire conductor 1 and the conductor cross-sectional area of the stranded wire conductor 101 of the prior art 1 are the same as S1 = S2, from formulas (13) and (14),
d ₁ = 1.05686 × d ₃ (15)
It becomes.

Therefore, the outer diameter D1 ′ of the stranded wire conductor 1 is expressed by the equations (9) and (15).
D1 ′ = 6.2915 × d ₁ = 6.64922 × d ₃ (16)
Moreover, the outer diameters D2 ′ and D3 ′ of the stranded wire conductors 100 and 201 of the conventional techniques 1 and 2 are expressed by the equations (10) and (11), respectively.
D2 ′ = 7 × d ₃ (17)
D3 ′ = 6.79 × d ₃ (18)
It becomes.

  Accordingly, even when the conductor cross-sectional areas of the stranded wire conductor 1 of the first embodiment and the prior arts 100 and 201 are the same, the relationship of D1 ′ <D3 ′ <D2 ′ is established, and the stranded wire conductor of the first embodiment is satisfied. 1 shows that the outer diameter can be reduced by about 5% compared to the stranded wire conductor 100 of the prior art 1 and about 2% than the stranded wire conductor 201 of the prior art 2.

  As described above, when a stranded wire conductor is produced without compression using a wire having the same diameter as the large diameter wire 2 and the small diameter wire 3 having the calculated relationship, as shown in FIG. The outer surface of the small-diameter wire 3 forming the wire interferes with the outer surface of the adjacent large-diameter wires 2 and 2, and a stranded wire conductor is formed slightly outside the theoretical position. Therefore, the distance L1 from the center A of the center line 11 to the outermost edge B of the thin wire 3 forming the outermost layer 14, and the outermost edge of the thick wire 2 forming the outermost layer from the center A of the center line 11 Although the distance L2 to C is not completely the same, the stranded wire conductor 1 that is closer to a perfect circle shape than the stranded wire conductor 100 of the prior art 1 can be obtained.

  In order to make the stranded wire conductor 1 shown in FIG. 2 closer to a perfect circle shape, it can be realized by manufacturing the stranded wire conductor 1 while passing a wire through a compression die. Even when the compression die is used to approximate a perfect circle shape, the compression rate may be about 2% or less, and it can be approximated to a perfect circle shape with a lower compression rate than the conventional technique 2 in which the compression rate is 4% or more. Compared with the prior art 2, it is possible to suppress a decrease in physical properties such as the stretch properties, flexibility, and flexibility of the stranded conductor 1.

Next, a manufacturing method of the stranded wire conductor 1 using a compression die will be described.
The stranded wire conductor 1 of the first embodiment is manufactured using a stranded wire machine 16 having a wire collecting port 15 as shown in FIG. A compression die 17 is provided in the concentrating port 15, and the eye plate 18 is provided behind the concentrating port 15. As shown in FIG. 4, the wire 18 has 37 wire passage holes 18 a, 18 b, and 18 c at predetermined intervals on a circle centered on the central axis of the compression die 17. It is formed through.

  In addition, wire rod supply portions 19 and 20 are disposed behind the eye plate 18, and the wire rod 2 a having a circular cross section (round shape) from which the wire diameter supply portions 19 and 20 are based on the thick wire 2 and the thin wire 3. 3a is supplied.

  First, as shown in FIG. 3A, the wire rods 2a and 3a are supplied from the wire rod supply portions 19 and 20 to the wire rod passage holes 18a and 18b of the eye plate 18, respectively. At this time, the wire rods 2a and 3a are supplied to the 18 wire rod passage holes 18a and 18b in the outermost peripheral direction and the twelve wire rod passage holes 18a and 18b provided inside thereof. As shown in FIG. 4, the wire 2a is supplied to the wire passing hole 18a corresponding to the position of the large diameter wire 2 in FIG. 1, and the wire 3a is connected to the thin wire 3 in FIG. Is supplied to the wire passing hole 18b corresponding to the position.

  The wires 2a and 3a that have passed through the wire passing holes 18a and 18b are gathered evenly in the center direction of the eyeplate 18, that is, the center direction of the compression die 17.

  The wire rods 2 a and 3 a gathered together are supplied to the twisting machine 16. When the wire rods 2a and 3a are supplied to the stranded wire machine 16, as shown in FIG. 3A, the lead wire 40 is simultaneously supplied so as to be positioned at the center of the circle formed by the wire rods 2a and 3a. .

  The diameter of the lead wire 40 is the same as the outer diameter of the first layer 12 that is the inner diameter of the second layer 13, that is, the diameter that is three times the diameter of the thick wire 2. Moreover, the length of the lead wire 40 should just be shorter than the length of the strands 2 and 3, and the thing of 150 mm was used in the present Example. The material of the lead wire 40 is not limited, but it is desirable to use the same material as that of the wires 2a and 3a.

  The wires 2 a and 3 a are arranged in a predetermined arrangement and pass between the lead wire 40 and the compression die 17 and are twisted in one direction by the twisting machine 16. In addition, the compression rate by the compression die 17 is arbitrarily set, and the twist pitch is also arbitrarily set.

  The wire rods 2 a and 3 a are compressed and deformed by the compression die 17 and the lead wire 40 to become the thick wire 2 and the thin wire 3, thereby forming the second layer 13 and the outermost layer 14.

  Next, as shown in FIG. 3B, the wire 2 a is supplied from the wire supply part 19 to the wire passing hole 18 c of the eye plate 18. At this time, the wire 2a is supplied to one wire passing hole 18c in the center and six wire passing holes 18c provided on the outside thereof. Note that the wire rods 2a and 3a continue to be supplied from the wire rod supply sections 19 and 20 to the wire rod passage holes 18a and 18b of the eyeplate 18 as described above.

  As shown in FIG. 4, the wire 2 a is supplied to the wire passage hole 18 c, and the wire 2 a that has passed through the wire passage hole 18 c is evenly moved toward the center direction of the eye plate 18, that is, the center direction of the compression die 17. Collected.

  The leading edge of the collected wire 2a is adhesively connected to the rear end portion of the lead wire 40, and the collected wire 2a is supplied to the place where the lead wire 40 is located.

  The supplied wire 2 a is twisted in one direction by the twisting machine 16 to become the thick wire 2, and the center line 12 and the first layer 13 are formed.

As described above, the stranded wire conductor 1 using the compression die is continuously formed. Note that when the stranded wire conductor 1 is manufactured without using the compression die and without being compressed and deformed, the compression die 17 and the lead wire 40 are used. The same manufacturing method as above is used.

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

The outer shape of the stranded wire conductor 1 can be a substantially perfect circle.
The outer shape of the stranded wire conductor 1 is a substantially circular shape and, as described above, can be made thinner than the stranded wire conductors 100 and 201 of the prior art 1 and 2, so that the insulation coating can be applied over the entire outer periphery. Can be made thin and substantially uniform, the amount of insulating material can be reduced, and the cost can be reduced.

  Further, in the stranded wire conductor 1 of the first embodiment, the strands 2 and 3 forming the outermost layer 14 are not subjected to compression deformation or have a lower compression rate than the stranded wire conductor 201 of the conventional technique 2. Because it is formed by compressive deformation, without damaging the physical properties such as stretch properties, flexibility, flexibility, or the rate of decrease in physical properties can be kept low, the physical properties of the wire can be kept high, A highly reliable stranded conductor 1 can be obtained.

Next, a specific application example of the first embodiment will be described.
In order to satisfy the relationship of the above formula (7), the diameter d ₁ that is the basis of the thick wire 2 is 0.260 mm, and the diameter d ₂ that is the basis of the thin wire 3 is d ₂ = 0.822875. Using the wire 3a of xd ₁ = 0.214 mm, a stranded wire conductor 1 was obtained as a collective stranded wire with a twist pitch of 15.6 mm and a compression rate of 1.9%, and this was designated as an implementation product 1. In addition, the material of wire 2a, 3a is a tin plating annealed copper wire.

  When the embodiment product 1 was observed with a microscope, each strand had an adjacent strand and a plurality of contact points.

  Moreover, the stranded wire conductor 201 of the prior art 2 was created with the twist pitch of 14.4 mm and the compression ratio of 4.6% using a tin-plated annealed copper wire of 0.260 mm as a comparative product 1.

  The average value of the elongation percentage of the strands constituting the outer layer of the product 1 was 13.3%. On the other hand, the average value of the elongation percentage of the strands constituting the outer layer of the comparative product 1 was 6.1%.

  Since the elongation rate of the stranded wire conductor 1 of the present invention is lower than that of the comparative product 1, the physical properties are higher than those of the prior art 2, and it has been found that a high quality product can be obtained. .

5 and 6 show the second embodiment.
FIG. 5 is a schematic cross-sectional view cut in a direction orthogonal to the axial direction of the stranded conductor 21. In addition, the oblique line which shows the cross section of each strand was abbreviate | omitted in order to avoid the complexity of a figure.

  As shown in FIG. 5, the stranded wire conductor 21 shown in Example 2 is composed of a total of 37 strands, and the strands are composed of a large diameter wire (element wire) 22 and the large diameter wire 22. The medium diameter wire (element wire) 23 having a small diameter and the thin wire (element wire) 24 having a diameter smaller than that of the medium diameter wire 23 are constituted by three types.

  The stranded wire conductor 21 includes a center line 31 formed by a single large-diameter wire 22 located at the center, and a six-core large-diameter wire 22 disposed so as to surround the outer periphery of the center line 31. The first layer 32 formed by the first layer 32, and the 12 cores formed by the total 12 cores including the six large diameter wires 22 and the six medium diameter wires 23 arranged so as to surround the outer periphery of the first layer 32. A third layer (outermost layer) formed by two layers 33 and a total of 18 cores composed of 12 cores of large diameter wires 22 and 6 cores of thin wires 24 arranged so as to surround the outer periphery of the second layer 33. 34).

  The strands 22, 23, and 24 are formed on the basis of a wire having a circular cross section (round shape). As this wire, a copper wire, a copper wire plated with tin, nickel, silver, an aluminum wire, or various alloy wires can be used as in the conventional case.

The first layer 32 KakuFutoshi radial line 22 to form an, as shown in FIG. 5, equidistant from the center A ₂ of the center line 31, and the thickness to form a first layer adjacent diameter line 22 They are arranged so as to be in point contact with each other and the center line 31. This contact is a point contact in the cross section of FIG. 5 and a line contact in the axial direction.

  Each of the six-core large-diameter wires 22 forming the second layer 33 partially enters each valley portion 36 formed between the outer peripheral surfaces of the adjacent large-diameter wires 22 and 22 in the first layer 32. And it arrange | positions so that the at least one core large diameter line 22 which forms the 1st layer 32 may be point-contacted. And between the large diameter line 22 and the large diameter line 22 which adjoin the circumferential direction of the 2nd layer 33, as shown in FIG. That is, the thick wire 22 and the medium wire 23 are alternately arranged in the circumferential direction of the second layer 13.

The six-core thin diameter wires 24 forming the outermost layer 34 are respectively apexes of the medium diameter wire 23 forming the second layer, that is, the center A ₂ of the center line 31 and the medium diameter forming the second layer. It is arranged so that the center of the thin wire 24 forming the outermost layer 34 is located on the extension line connecting the centers of the lines 23 or in the vicinity thereof. And between the thin diameter line 24 adjacent to the circumferential direction of the outermost layer 34 and the thin diameter line 24, as shown in FIG. 5, the two large diameter lines 22 and 22 are arrange | positioned. That is, in the circumferential direction of the outermost layer 34, two large-diameter lines 22 and 22 are arranged between the small-diameter lines 24 and 24.

Further, the outer shape of the stranded conductor 21 by the above-described configuration, a substantially circular shape, i.e., the distance from the center A ₂ of the center line 31 to the outermost outer edge B ₂ of the small-diameter wire 24 to form the outermost layer 34 L5 When the distance L6 to the outermost outer edge C ₂ thick diameter line 22 which forms the outermost layer is formed to be substantially the same from the center a ₂ of the center line 31. That is, the outermost edge ends B ₂ and C ₂ of all the large diameter wires 22 and the small diameter wires 24 that form the outermost layer 34 are, as shown in FIG. 5, from the center A ₂ of the center line 31 to the small diameter wires 24. substantially to the distance L5 to the outermost edge B ₂ and the radius is formed to be located above the true circle line.

Then, the stranded conductor 21, the outermost layer and the distance L5 from the center _{A 2} of the center line 31 to the outermost outer edge _{B 2} of the small-diameter wire 24 to form the outermost layer 34, from the center _{A 2} centerline 31 34 the distance L6 to the most outer edge C ₂ thick diameter line 22 forming will be described relationship as to be substantially identical.

Thick diameter line 22, medium diameter line 23, a thin line 24, the sectional shape of the wire as the respective groups are as true circle respectively the same shape, the diameter of the thick diameter line 22 and d _11, medium diameter line 23 diameter of the _{d 12,} the diameter of the small-diameter wire 24 and _{d 13.}

Distance L5 from the center _{A 2} of the center line 31 to the outermost outer edge _{B 2} of the small-diameter wire 24 forming the outermost layer 34,
_{L5 = d 11/2 + d} 11 + d 12 + d 13 ··· (21)
It becomes.

  The stranded conductor 21 of the second embodiment includes a six-core wire 106 that forms the hexagonal apex of the outermost layer in the stranded conductor 100 of the prior art 1 (FIG. 7), and the six cores and the center line. The six-core strands 108 forming the second layer located on the line connecting the two are replaced with strands having a diameter different from that of the other strands.

Therefore, the distance from the center _{A 1} of the center line 102 in the stranded conductor 100 of the prior art 1 to the most outer edge _{C 1} next to the wire 107 of the apex portion of the wire 106 forming the outermost layer 105 of FIG. 7 L3 When the distance L6 from the center _{a 2} of the center line 31 in the stranded conductor 21 of the second embodiment to the most outer edge _{C 2} thick diameter line 22 which forms the outermost layer 34, the prior art 1 stranded conductor 100 assume the diameter of the wire of the d ₁₁ diameter of the thick diameter line 22 and are the same when the same.

In FIG. 7, the contact point between the adjacent strands 107 and 107 is D, the distance from the center A ₁ of the center line 102 to the point D is x, the center of the strand 107 is E, and the line A ₁ If the angle formed by D and the line A ₁ E is θ,
_{L6 = L2 = A 1 E +} d 11/2
_{= X × secθ + d 11/} 2 ··· (22)
When the center of the strand 106 is F,
cos30 ° = A ₁ D / A ₁ F
= X / (3 × d ₁₁ )
From the above, x = 3d ₁₁ · cos 30 ° (23)
It becomes.

Also, tan θ = DE / A ₁ D
_{= (D 11/2) /} x ··· (24)
From Equations (23) and (24), θ = 10.89339 ° (25)
From equations (22), (23), and (25), L6 = 3.14575d ₁₁ (26)
It becomes.

From the above, L5 = L6
From equations (21) and (26),
d ₁₂ + d ₁₃ = 1.64575d ₁₁ (27)
It becomes.

If the center point of the strand 106 at the apex of the stranded conductor 100 of the prior art 1 is G (see FIG. 6) and the distance B ₂ G is y, as shown in FIG.
L6 = L5 = distance A ₂ G + y
_{= D 11/2 + d 11} + d 11 + d 11/2 + y ··· (28)
From equations (26) and (28), y = 0.14575d ₁₁ (29)
It becomes.

When the center point of the large-diameter wire 22 forming the outermost layer 34 of the stranded wire conductor 21 is H,
Distance _{GH = d 11/2 + d} 11/2
The center point of the thin wire 24 forming the outermost layer 34 of the stranded conductor 21 is defined as I, and the contact point between the strand 107 of the stranded conductor 100 of the prior art 1 and the strand 108 positioned inside thereof is defined as J. And assuming that distance IJ = distance IG,
IB ₂ = _{d 13/2}
= Y + distance IG = y + distance JG / 2 (30)
When the angle formed by the line HJ and the line HG is approximated to 30 degrees,
Distance JG = distance _{HG × sin30 ° = d 11/} 2 ··· (31)
It becomes.

Therefore, from the equations (29) to (31),
d ₁₃ = 0.79150 d ₁₁ (32)
From equations (27) and (32), d ₁₂ = 0.85425d ₁₁ (33)
By forming the stranded conductor 21 using the large diameter wire 22, the medium diameter wire 23, and the small diameter wire 24 that satisfy such a relationship, the outermost layer is formed from the center A ₂ of the center line 31. 34 a distance L5 to the most outer edge B ₂ of the small-diameter wire 24 to form the distance L6 to the outermost outer edge C ₂ is substantially the same diameter radial line 22 to form the outermost layer from the center a ₂ of the center line 31 It can be.

The outer diameter D4 of the stranded conductor 21 of the second embodiment, since it is D4 = 2 × L5, from D4 = 2 × formula _{(21) (d 11/2} + d 11 + d 12 + d 13) ··· ( 34)
When the equations (32) and (33) are introduced into the equation (34), D4 = 6.2915 × d ₁₁ (35)
It becomes.

On the other hand, in the prior art 1, the maximum outside diameter D5 of the stranded conductor 100 when the diameter of the wires (wire) was assumed to d _11, as is apparent from FIG. 4,
D5 = 7 × d ₁₁ (36)
It is.

The outer diameter D6 of the stranded conductor 201 of the prior art 2, the diameter of the wires (wire) at d _2, and the best compression ratio in 3% (stranded conductor 201 in diameter ratio of compression ratio )
_{D6 = 7 × d 11 × (} 1-3 / 100) = 6.79 × d 11 ··· (37)
It is.

  Therefore, it becomes D4 <D6 <D5 and it turns out that the stranded wire conductor 21 of the present Example 2 can make the maximum outer diameter smaller than the stranded wire conductors 101 and 201 of the prior arts 1 and 2.

However, assuming that the strands of the prior arts 1 and 2 are d ₁₁ as described above, the conductor cross-sectional areas of the stranded conductor 21 of the second embodiment and the stranded conductors 101 and 201 of the prior art are different.

  Therefore, next, the outer diameter D4 ′ of the stranded wire conductors 1, 101, 201 when the conductor cross-sectional areas of the stranded wire conductor 21 of the second embodiment and the stranded wire conductors 101, 201 of the prior art 1 and 2 are the same. , D4 ′ and D6 ′ are compared.

The cross-sectional area S4 of the stranded conductor 1 of Example 2 is
S4 = (π / 4 × d ₁₁ ² × 25) + (π / 4 × d ₁₂ ² × 6) + (π / 4 × d ₁₃ ² × 6) (38)
When formulas (32) and (33) are introduced into formula (38),
S4 = 26.0260 × d ₁₁ ² (39)
It becomes.

On the other hand, when the diameter of the wire of stranded conductor 101 of the prior art 1 and _{d 4,} the cross-sectional area S2 of the stranded conductor 100,
S5 = π / 4 × d ₄ ² × 37
= 29.0598 × d ₄ ² (40)
It becomes.

The conductor cross-sectional area S4 of the stranded wire conductor 21 and the conductor cross-sectional area S5 of the stranded wire conductor 101 of the prior art 1 are the same as S4 = S5, from Equations (39) and (40),
d ₁₁ = 1.05667 × d ₄ (41)
It becomes.

Therefore, the outer diameter D4 ′ of the stranded wire conductor 1 is expressed by the equations (35) and (41).
D4 ′ = 6.2915 × d ₁ = 6.664803 × d ₄ (42)
In addition, the outer diameters D2 ′ and D3 ′ of the stranded wire conductors 100 and 201 of the prior arts 1 and 2 are expressed by equations (36) and (37),
D5 ′ = 7 × d ₄ (43)
D6 ′ = 6.79 × d ₄ (44)
It becomes.

  Therefore, even when the conductor cross-sectional areas of the stranded wire conductor 21 and the prior arts 100 and 201 are the same, the relationship of D4 ′ <D6 ′ <D5 ′ is established, and the stranded wire conductor 21 of the second embodiment is related to the prior art. It can be seen that the outer diameter can be made thinner by about 5% than the stranded wire conductor 100 of 1 and about 2% of the stranded wire conductor 201 of the prior art 2.

As described above, when a stranded wire conductor is manufactured without compression using wires having the same diameter as the large diameter wire 22, the medium diameter wire 23, and the small diameter wire 24 having the calculated relationship, as shown in FIG. , the small-diameter wire 24 to form the outermost layer 34 from the center _{a 2} of the center line 31 a distance L5 to the outermost edge end _{B 2,} from the center _{a 2} of the center line 31 of the thick diameter line 22 which forms the outermost layer it can distance L6 to outermost end C ₂ to obtain a stranded wire conductor becomes substantially the same.

The manufacturing method of the stranded conductor 21 of the second embodiment is the same as that of the first embodiment.
The stranded wire conductor 21 of the second embodiment has the same operations and effects as the first embodiment.

  Moreover, the twisted wire conductor 21 of the present Example 2 can obtain the twisted wire conductor 21 nearer perfect circle shape than the said Example 1 in the state which is not compressed.

Next, a specific application example of the second embodiment will be described.
The diameter d ₁₁ of the large-diameter wire 22 is 0.260 mm, and the diameter d ₁₂ of the medium-diameter wire 23 is d ₁₂ = 0.85425 × d ₁₁ = 0. 222mm, the diameter _{d 13} of the small-diameter wire 24 using three strands 22, 23, 24 to _{d 13 = 0.79150 × d 11 =} 0.206mm, as collectively twisted in twisting pitch 18.7mm The stranded wire conductor 21 was obtained, and this was designated as an implementation product 2. In addition, the material of the strands 22, 23 and 24 is a tinned annealed copper wire.

  When this embodiment product 2 was observed with a microscope, each strand had an adjacent strand and a plurality of contact points.

  Moreover, the average value of the elongation percentage of the strands constituting the outer layer of the product 2 was 19.2%. Since this embodiment product 2 is not compressed, the elongation rate is higher than that of the embodiment product 1 (average value of the elongation rate of 13.3%) in the embodiment 1 with a low compression rate, which is higher than that of the embodiment 1. It was found that a product with high physical properties and high quality was obtained.

The cross-sectional schematic diagram cut | disconnected in the direction orthogonal to the axial direction of the strand wire conductor of Example 1 in this invention. The elements on larger scale for demonstrating Example 1 in this invention. Schematic which shows the manufacturing method of the strand wire conductor of Example 1 in this invention. The front view of the eyeplate used at the time of manufacture of the stranded wire conductor of Example 1 in this invention. The cross-sectional schematic diagram cut | disconnected in the direction orthogonal to the axial direction of the strand wire conductor of Example 2 in this invention. The elements on larger scale for demonstrating Example 2 in this invention. Sectional drawing cut | disconnected in the direction orthogonal to the axial direction of the strand wire conductor of the prior art 1. FIG. Sectional drawing cut | disconnected in the direction orthogonal to the axial direction of the strand wire conductor of the prior art 2. FIG.

Explanation of symbols

1, 21 Twisted wire conductor 2, 22 Large diameter wire (elementary wire)
23 Medium diameter wire (elementary wire)
3, 24 Thin wire (elementary wire)
2a, 3a wire
11, 31 Center line 12, 32 First layer 13, 33 Second layer 14, 34 Outermost layer

Claims (6)

A single-core element wire is used as a center line, and a six-core element wire surrounds the center line to form a first layer, and a twelve-core element wire surrounds the outer periphery of the first layer. A 37-core stranded conductor forming an outermost layer by forming an outermost layer by forming a layer and surrounding an outer periphery of the second layer with 18 core wires;
The diameter of the wire used as the basis of 12 strands of the 18 cores constituting the outermost layer, and the diameter of the wire used as the basis of 6 strands of the 12 cores constituting the second layer , Set to be the same as the diameter of the wire that is the basis of the wire constituting the center line and the first layer,
The diameter of the wire used as the basis of the other 6 cores of the 18 cores constituting the outermost layer and the base of the other 6 cores of the 12 cores constituting the second layer A stranded wire conductor, characterized in that the diameter of the wire is set smaller than the diameter of the wire that is the basis of the wire constituting the center line and the first layer. The second layer is formed of a wire formed from a wire having a diameter smaller than the diameter of the wire serving as the base of the center line, and a wire having the same diameter as the diameter of the wire serving as the base of the center line. The strands are arranged alternately in the circumferential direction,
The outermost layer is formed at the apex portion of the strand formed from the wire having a diameter smaller than the diameter of the wire serving as the basis of the center line, and the second layer is formed. 2. The stranded wire conductor according to claim 1, wherein the strands formed from a wire having a diameter smaller than the diameter of the base wire are arranged. The distance from the center point of the center line to the outermost edge of the strands that constitute the outermost layer and that is formed from a wire having a diameter smaller than the diameter of the wire that is the basis of the center line;
The distance from the center point of the center line to the outermost edge of the element wire formed from the wire having the same diameter as the diameter of the wire that is the basis of the center line, constituting the outermost layer,
The stranded wire conductor according to claim 2, which is the same. The wire that is the basis of the element wire that constitutes the outermost layer, and the diameter of the wire that has a diameter smaller than the diameter of the wire that becomes the basis of the center line,
The wire that is the basis of the strands constituting the second layer, and the diameter of the wire that has a smaller diameter than the diameter of the wire that is the basis of the center line,
The stranded wire conductor according to any one of claims 1 to 3, wherein the stranded wire conductors are the same. The wire that is the basis of the element wire that constitutes the outermost layer, and the diameter of the wire that has a diameter smaller than the diameter of the wire that is the basis of the center line,
The diameter of a wire that is a base of the strand constituting the second layer and that has a diameter smaller than the diameter of the wire that is the base of the center line is smaller than the diameter of the wire. The twisted wire conductor according to any one of 3.   The stranded wire conductor according to any one of claims 1 to 5, wherein the outermost layer is formed by compressive deformation.

Images