JP2020091993A - Manufacturing method of twisted-wire conductor - Google Patents

Abstract

To provide a manufacturing method of a twisted-wire conductor, using a single twist buncher-type twisting machine or a double twist buncher-type twisting machine, and preventing a pitch of strands positioned in a central part from thinning too much.SOLUTION: A manufacturing method of a twisted-wire conductor 1 for manufacturing the twisted-wire conductor by using a single twist buncher-type twisting machine or a double twist buncher-type twisting machine includes: arranging a strand 4 comprising a single wire to be a center line 11 in the center; constituting an inner layer 2 by arranging six strands 4 having the same diameter as that of the strand 4 around the center line 11; arranging around the inner layer 2, an outer layer 3 constituted of twisted wires 7, 8, 9 constituted of a plurality of strands 7a, 8a, 9a, and comprising a plurality of layers 14, 15; and manufacturing the strands 4 constituting the inner layer 2, and the twisted wires 7, 8, 9 constituting the outer layer 3 by twisting in the same direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for manufacturing a stranded conductor.

BACKGROUND ART Conventionally, a twisted wire conductor is known in which three types of child twisted conductors having different outer diameters are used and a total of 19 child twisted conductors are used so that the outer diameter is substantially circular (Patent Document 1). 1).

This stranded wire conductor is generally manufactured by using a tubular type stranded wire machine or a planetary type stranded wire machine.

JP, 2009-140661, A

A high-quality stranded wire conductor can be obtained by producing a stranded wire conductor by using a tubular type stranded wire machine or a planetary type stranded wire machine, but the productivity per unit time is low. In addition, the mechanical equipment is expensive and the manufacturing cost is high.

In addition, when using a single twist buncher type twisting machine and a double twist buncher type twisting machine, which have high productivity per hour and the cost of their mechanical equipment is low, place the child twisted conductor in the center. If the child twisted conductors are arranged and subjected to parent twist, the pitch of the child twisted conductors at the center becomes fine, and the physical properties and the like of the manufactured twisted wire conductor may be deteriorated.

Therefore, an object of the present invention is to provide a method for producing a twisted wire conductor which solves the above problems, while using a single twist buncher type twisting machine or a double twist buncher type twisting machine. ..

In order to solve the above-mentioned problems, the invention according to claim 1 is a method for manufacturing a twisted wire conductor for manufacturing a twisted wire conductor using a single twist buncher type twisting machine or a double twist buncher type twisting machine. Then, an element wire consisting of a single wire to be the center line is arranged in the center, and six element wires having the same diameter as the element wire are arranged around the center line to form an inner layer,
Around the inner layer, which is composed of a twisted wire composed of a plurality of strands, and the outer layer is formed of a plurality of layers,
It is characterized in that the element wire forming the inner layer and the stranded wire forming the outer layer are twisted in the same direction to be manufactured.

According to a second aspect of the present invention, in the first aspect of the invention, the twisted wire forming the innermost layer of the outer layer is a wire other than the center line in the inner layer and is adjacent to each other in the circumferential direction. It is characterized in that it is located in a valley portion formed by a strand.

The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, three types of thin-diameter twisted wires, medium-diameter twisted wires, and large-diameter twisted wires having different diameters are used as the twisted wires. It is what

According to a fourth aspect of the invention, in the third aspect of the invention, the total number of twisted wires forming the outer layer is 18 or 36.

The present invention is a method for producing a stranded conductor using a single-twist buncher type twisting machine or a double-twist buncher type twisting machine, which comprises a single wire serving as a center line in the center. A wire is arranged, six wires having the same diameter as this wire are arranged around the center line to form an inner layer, and a twisted wire composed of a plurality of wires is formed around the inner layer. In addition, by disposing an outer layer composed of a plurality of layers and twisting the strands constituting the inner layer and the strands constituting the outer layer in the same direction, the strands located in the central portion are manufactured. The twisting pitch of the wire does not become too fine, and the manufacturing cost can be suppressed at low cost.

1 is a cross-sectional view of a stranded wire conductor according to a first embodiment of the present invention. FIG. 2 is a schematic diagram for explaining the arrangement of inner layer wires, small-diameter stranded wires, medium-diameter stranded wires, and large-diameter stranded wires in the stranded wire conductor of FIG. 1. The figure which shows the eye plate used for Example 1 of this invention. FIG. 3 is a diagram for explaining a method for manufacturing a stranded conductor according to the first embodiment of the present invention. FIG. 6 is a cross-sectional view of an example of a stranded wire conductor according to a second embodiment of the present invention.

A mode for carrying out the present invention will be described based on an embodiment shown in the drawings.

[Example 1]
FIG. 1 is a schematic cross-sectional view taken along a direction orthogonal to an axial direction of a twisted wire conductor (hereinafter, simply referred to as a twisted wire conductor) 1 of a composite twisted wire according to a first embodiment of the present invention, which is a basis of each strand. It is a schematic diagram at the time of making the cross-sectional shape of a wire material and the cross-sectional shape of a strand the same. The diagonal lines showing the cross section of each strand are omitted to avoid complication of the drawing.

The stranded conductor 1 is composed of an inner layer 2 and an outer layer 3, as shown in FIGS. The inner layer 2 is composed of 7 inner layer wires 4, and the outer layer 3 is 6 small-diameter twisted wires (twisted wires) 7 and 6 medium-diameter twisted wires (twisted wires) 8 and 6 large-diameter twisted wires. The wire (twisted wire) 9 is composed of three kinds of twisted wires, and a total of 18 twisted wires. These three types of twisted wires 7, 8 and 9 are respectively formed of child twisted conductors formed by twisting seven elemental wires 7a, 8a and 9a (child twisting) as shown in FIG. Has been done.

As shown in FIGS. 1 and 2, the twisted wire conductor 1 is formed by further twisting (parent twisting) seven inner layer wires 4 and eighteen twisted wires 7, 8, 9 .. The twisting directions of the child twist and the parent twist are the same. The parent twist pitch and the child twist pitch are arbitrarily set, but in the present embodiment, the parent twist pitch is made larger than the child twist pitch.

The inner layer 2 is composed of a center line 11 composed of one inner layer line 4 located at the center, and a first inner layer 12 formed by surrounding the center line 11 with six inner layer lines 4. Thus, the inner layer 2 is composed of seven inner layer wires 4 having the same diameter. Each inner layer wire 4 is configured to come into contact with all other adjacent inner layer wires 4 at any portion in the axial direction.

The outer layer 3 surrounds the inner layer 2 with six twisted wires 8 to form a first outer layer 14, and the outer circumference of the first outer layer 14 is surrounded by 12 twisted wires 7 and 9 to form an outermost layer 15. Is formed of 18 concentric twisted arrays that form a. Further, each twisted wire 7, 8, 9 is configured to come into contact with all other adjacent twisted wires 7, 8, 9 or the inner layer wire 4 at any portion in the axial direction.

The first outer layer 14 is composed of six medium-diameter stranded wires 8, and each medium-diameter stranded wire 8 constitutes the first inner layer 12, and the inner valley portions of the inner layer wires 4 and 4 which are adjacent to each other in the circumferential direction. It is arranged so as to be located at 16. The medium-diameter stranded wire 8 is formed by surrounding the center line with the medium-diameter strand 8a and six medium-diameter strands 8a. It is composed of the wire 8a. Each medium-diameter wire 8a is configured to come into contact with all other adjacent medium-diameter wires 8a.

As shown in FIGS. 1 and 2, the outermost layer 15 is composed of six small-diameter twisted wires 7 and six large-diameter twisted wires 9. Each large-diameter twisted wire 9 constitutes a first outer layer 14 and Are arranged so as to be located in the valley portions 17 on the outside of the medium-diameter stranded wires 8 and 8 that are adjacent to each other in the circumferential direction. A small-diameter twisted wire 7 is arranged between the large-diameter stranded wire 9 and the large-diameter stranded wire 9 that are closest to each other in the circumferential direction. That is, the small-diameter twisted wires 7 and the large-diameter twisted wires 9 are alternately arranged in the circumferential direction of the outermost layer 15.

The small-diameter stranded wire 7 is formed by surrounding the center line of the small-diameter strand 7a with six small-diameter strands 7a, and a total of seven small-diameter strands of the same diameter. It is composed of the wire 7a. Each small-diameter wire 7a is configured to come into contact with all other adjacent small-diameter wires 7a.

The large-diameter twisted wire 9 is formed by surrounding the center line of the large-diameter strand 9a with six large-diameter strands 9a, and has a total of seven large-diameter strands of the same diameter. It is composed of a wire 9a. Each large-diameter strand 9a is configured to come into contact with all the other large-diameter strands 9a adjacent to each other.

As shown in FIG. 2, the maximum outer diameter d ₁ of the thin stranded wire 7 is smaller than the maximum outer diameter d ₂ of the middle径撚line 8, the maximum outer diameter d ₂ of the middle径撚line 8, thick径撚It is formed smaller than the maximum outer diameter d ₃ of the wire 9. The diameter _{d 11} of the small-diameter wire 7a is smaller than the diameter _{d 21} of the middle径素line 8a, the diameter _{d 21} of the middle径素line 8a is formed smaller than the diameter _{d 31} of thick径素line 9a There is. The diameter d ₄₁ of the inner layer wire 4 is formed larger than the diameter d _{31 of the} large-diameter wire 9a.

The inner layer wire 4, the small-diameter wire 7a, the medium-diameter wire 8a, and the large-diameter wire 9 are formed on the basis of wires having circular cross sections (round shapes) having different diameters. As these wires, a copper wire, a copper wire plated with tin, nickel, or silver, an aluminum wire, various alloy wires, or the like can be used as in the conventional case.

The outer circumference of the stranded wire conductor 1 formed as described above can be coated with an insulating material and used as an electric wire or the like.

With the above configuration, the outer shape of the stranded wire conductor 1 can be a shape close to a substantially perfect circle. That is, as shown in FIG. 2, the distance L1 from the center A of the center wire 11 to the outermost edge B of the small-diameter twisted wire 7 and the center A of the center wire 11 to the outermost edge C of the large-diameter twisted wire 9 Are formed so that the distances L2 thereof are substantially the same. The outermost edges B and C of all the small-diameter twisted wires 7 and the large-diameter twisted wires 9 forming the outermost layer 15 are from the center A of the center line 11 to the outermost edges of the small-diameter twisted wires 2 as shown in FIG. It is formed so as to be located on a substantially perfect circle having a radius L1 to the end B as a radius.

For example,
_{d 21 = 1.21d 11 ··· (1} )
d ₃₁ =1.33d ₁₁ (2)
d ₄₁ =1.41d ₁₁ (3)
By setting so as to satisfy the relational expression of, even if the stranded wire conductor 1 is formed without compression, the distance L1 from the center A of the stranded wire conductor 1 to the outermost edge B of the thin stranded wire 7, The distance L2 from the center A to the outermost edge C of the large-diameter stranded wire 8 is substantially the same, and the stranded wires 7, 8, 9 and the inner layer wire 4 are in contact with almost all adjacent element wires. be able to.

A method of manufacturing the stranded wire conductor 1 of the present invention will be described.

The small-diameter strands 7a, which are wire rods having a circular (circular) cross-section, the medium-diameter strands 8a, and the large-diameter strands 9a are used in advance, respectively, and the thin-diameter strands 7 serving as child twist conductors and the medium-diameter strands are used. The stranded wire 8 and the large-diameter stranded wire 9 are manufactured.

The stranded wire conductor 1 is manufactured by using a mesh plate 20 as shown in FIG. 3, and each mesh plate 20 has a central wire rod passage hole 21 at the center thereof, and a central wire rod passage hole 21 with 6 The first wire rod passage holes 22 are formed at equal intervals in the circumferential direction, and the six second wire rod passage holes 23 are formed at equal intervals in the outer circumferential portion of the six first wire rod passage holes 22. Twelve third wire rod passage holes 24 are formed in the outer peripheral portion of the six second wire rod passage holes 23 at equal intervals in the circumferential direction.

As shown in FIG. 4, a first eye plate 20A, a second eye plate 20B, and a third eye plate 20C having passage holes 21 to 24 formed at positions similar to those of the eye plate 20 are arranged in parallel.

First, a wire rod 4a having a circular cross section (round shape), which is a base of the inner layer wire 4, is supplied from a wire rod supply unit (not shown) to the central wire rod passage hole 21 and the first wire rod passage hole 22 of the first eye plate 20A. It

After that, the wire rods 4a that have passed through the central wire rod passage holes 21 and the first wire rod passage holes 22 of the first eye plate 20A are gathered evenly in the central portion as shown in FIG. Through the central wire rod passage hole 21. Further, the medium diameter stranded wire 8 is supplied from the stranded wire supply portion (not shown) to the second wire rod passage holes 23 of the first eye plate 20A and the second eye plate 20B.

After that, the medium-diameter stranded wires 8 that have passed through the second wire rod passage holes 23 of the second eye plate 20B are gathered evenly on the outer peripheral portion of the wire rod 4a, as shown in FIG. 4, and together with the wire rod 4a, the third eye plate. It passes through the central wire passage hole 21 of 20C. Further, in the third wire rod passage holes 24 of the first eye plate 20A, the second eye plate 20B, and the third eye plate 20C, the small-diameter stranded wire 7 and the large-diameter stranded wire 9 are provided from the stranded wire supply portion (not shown). It is supplied alternately in the circumferential direction.

After that, the small-diameter twisted wires 7 and the large-diameter twisted wires 9 that have passed through the third wire rod passage holes 24 of the third eye plate 20C are gathered evenly on the outer peripheral portion of the medium-diameter twisted wire 8, and then the collecting die 30 Then, the inner layer wire 4, the small-diameter stranded wire 7, the medium-diameter stranded wire 8, and the large-diameter stranded wire 9 are fed in the same direction by a single twist buncher type twisting machine or a double twist buncher type twisting machine 31. Is twisted to form a stranded wire conductor 1. The direction of parent twist is set in the same direction as the twist direction of the small-diameter twisted wire 7, the medium-diameter twisted wire 8, and the large-diameter twisted wire 9, and the pitch thereof is set arbitrarily.

Since the stranded wire conductor 1 of the present invention has the above-mentioned structure, it has the following actions and effects.

Each of the seven inner layer wires 4 constituting the inner layer is composed of one wire material and is manufactured by twisting only once in the parent twist. Since the wire is twisted twice, a child twist and a parent twist, there is no problem that the pitch becomes finer, and the twisted wire conductor 1 in which the inner layer 2 is formed at an arbitrarily set parent twist pitch is manufactured. be able to.

As described above, the single-twist buncher type twisting machine or the double twist buncher type twisting machine 31 with high production efficiency can be used to stably manufacture the stranded conductor 1 with high quality.

Since the outer shape of the stranded wire conductor 1 of the composite stranded wire can be formed into a substantially perfect circle, the thickness of the insulating material coating can be reduced and can be made substantially uniform, so that the amount of the insulating material can be reduced and the cost can be reduced. it can. In addition, the risk of damaging the stranded wire conductor 1 when the covering material is stripped is reduced when the covered wire is end-processed, and the yield can be improved.

Since the twisted wires 7, 8, 9 and the inner layer wire 4 are in contact with all the adjacent twisted wires 7, 8, 9 and the inner layer wire 4 at any portion in the axial direction, the twisted wires 7, 8 of the covering material , It is possible to suppress the fall into the inside of 9.

The stranded wire conductor 1 may be formed by compressing the outermost portion of the outermost layer 15 with a compression die or the like. By this compression, the outer peripheral portions of the twisted wires 7 and 9 forming the outermost layer 15 are compressed and deformed, and the outer shape of the twisted wire conductor 1 can be made closer to a perfect circle. The 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 set arbitrarily.

[Example 2]
In the first embodiment, the inner layer 2 is composed of seven inner layer wires 4 and the outer layer 3 is composed of three kinds of twisted wires 7, 8 and 9, but the inner layer 2 is composed of seven inner layer wires 4. In addition, if there are a plurality of types of twisted wires forming the outer layer, the number of twisted wires forming the outer layer can be set to an arbitrary number. Further, the number of layers forming the outer layer can be arbitrarily set as long as it is two or more, and the arrangement of the strands thereof can be arbitrarily set. In addition, in each stranded wire that constitutes the outer layer, it is preferable to use all the strands that form the stranded wire that have the same diameter.

For example, as shown in FIG. 5, the outer layer 31 is formed by surrounding the inner layer 2 with six medium diameter stranded wires 38 and forming a first outer layer 32 and the outer periphery of the first outer layer 32 with six thin layers. The second outer layer 33, which is formed by surrounding the diameter stranded wire 37 and the six large diameter stranded wires 39, and the outer circumference of the second outer layer 33, includes nine thin stranded wires 37 and nine medium sized stranded wires 38. Alternatively, the stranded wire conductor 41 may be formed of the outermost layer 34 that is formed so as to cover and surround. The inner layer 2 of the stranded wire conductor 41 is configured similarly to the inner layer 2 of the stranded wire conductor 1 in the first embodiment.

As shown in FIG. 2, the second outer layer 33 is composed of six small-diameter twisted wires 37 and six large-diameter twisted wires 39, and the small-diameter twisted wires 37 and the large-diameter twisted wires 37 are arranged in the circumferential direction. 39 are arranged alternately.

As shown in FIG. 5, the outermost layer 34 is composed of nine small-diameter twisted wires 37 and 18 medium-diameter twisted wires 38, and between the small-diameter twisted wires 37 and 37 adjacent in the circumferential direction. Two medium diameter stranded wires 38, 38 are arranged.

With the above configuration, the outer shape of the stranded wire conductor 41 can be a shape close to a substantially perfect circle, as in the first embodiment.

The other members and the structure are formed in the same manner as in the first embodiment, and the description thereof will be omitted.

Also, in the second embodiment, the same operation and effect as those of the first embodiment can be obtained.

1,41 Stranded conductor 2 Inner layer 3,31 Outer layer 4 Inner layer wire (strand)
7,37 Small diameter stranded wire (stranded wire)
8,38 Medium-diameter stranded wire (stranded wire)
9,39 Large diameter stranded wire (stranded wire)
11 Center stranded wire 16 Valley

For example, as shown in FIG. 5, the outer layer 31 is formed by surrounding the inner layer 2 with six medium diameter stranded wires 38 and forming a first outer layer 32 and the outer periphery of the first outer layer 32 with six thin layers. The second outer layer 33, which is formed by surrounding the diameter stranded wire 37 and the six large diameter stranded wires 39, and the outer circumference of the second outer layer 33, includes six thin stranded wires 37 and twelve medium diameter stranded wires 38. Alternatively, the stranded wire conductor 41 may be formed of the outermost layer 34 that is formed so as to cover and surround. The inner layer 2 of the stranded wire conductor 41 is configured similarly to the inner layer 2 of the stranded wire conductor 1 in the first embodiment.

As shown in FIG. 5 , the second outer layer 33 is composed of six small-diameter twisted wires 37 and six large-diameter twisted wires 39, and the small-diameter twisted wires 37 and the large-diameter twisted wires 39 are arranged in the circumferential direction. 39 are arranged alternately.

As shown in FIG. 5, the outermost layer 34 is composed of 6 small-diameter twisted wires 37 and 12 medium-diameter twisted wires 38, and between the small-diameter twisted wires 37 and 37 that are adjacent to each other in the circumferential direction. Two medium diameter stranded wires 38, 38 are arranged.

Claims (4)

A method for producing a stranded conductor using a single-twist buncher type twisting machine or a double-twist buncher type twisting machine, in which a single wire serving as a center line is arranged at the center. Then, six strands of the same diameter as this strand are arranged around the center line to form the inner layer,
Around the inner layer, which is composed of a twisted wire composed of a plurality of strands, and the outer layer is formed of a plurality of layers,
A method for producing a stranded wire conductor, comprising: twisting a wire constituting the inner layer and a stranded wire constituting the outer layer in the same direction. The twisted wire forming the innermost layer of the outer layer is a strand other than the center line in the inner layer, and is located in a valley portion formed by strands and strands adjacent in the circumferential direction. The method for producing a stranded wire conductor according to claim 1. 3. The method for producing a stranded wire conductor according to claim 1, wherein three kinds of thin-diameter stranded wire, medium-diameter stranded wire, and large-diameter stranded wire having different diameters are used as the stranded wire. The method for producing a stranded wire conductor according to claim 3, wherein the total number of stranded wires constituting the outer layer is 18 or 36.

Images