JP5896869B2 - Stranded conductor - Google Patents

Description

  The present invention relates to a stranded wire conductor, and more particularly, to a stranded wire conductor constituted by a 30-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, various alloy wires, or the like is used.

  In addition, as shown in FIGS. 5 and 6, a stranded conductor composed of 30 strands generally has a central layer 102 in which a 4-core strand 101 is arranged at the center and a periphery thereof. The stranded wire conductor 100 is constituted by an inner layer 103 formed by covering the ten core wires 101 and an outer layer 104 formed by covering the outer periphery of the inner layer 103 by the sixteen core wires 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 of a wire having the same diameter, the outer shape of the cross section in the 30-core concentric strand arrangement 100 composed of the strands 101 is used. As shown in FIGS. 5 and 6, the shape approximates a hexagonal shape. Hereinafter, the above-described stranded wire conductor 100 is referred to as Conventional Technology 1.

  Further, as shown in FIGS. 5 and 6, the stranded wire conductor 100 is generally used in a state where the outer peripheral portion is covered with an insulating material 110 mainly composed of petroleum, and the outer shape is substantially true. A circular shape is desired.

  Covering the outer periphery of the stranded conductor 100 with the insulating material 110 substantially uniformly is important in terms of pressure resistance. Further, the reduction in the amount of the insulating material 110 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, when the outer shape of the stranded wire conductor 100 is a hexagon and the outer surface shape of the covered wire is a perfect circle as described above, the outer shape of the stranded wire conductor 100 is a hexagon as shown in FIGS. The thickness of the insulating material 110 located in the vicinity of the apex of the thin film is thin, and the thickness of the insulating material 110 increases toward the center of the side of the hexagon, 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 100 may be damaged when the covering material 110 is stripped when the coated wire is subjected to terminal processing.

  Further, irregular irregularities are generated in the outer peripheral shape of the stranded wire conductor 100, and when the coating material 110 is coated on the stranded wire conductor 100, the resin of the coating material 110 is likely to bite into the recess, and the coating material Concavities and convexities are formed on the outer periphery of 110, and there is a risk of damaging its value.

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, the outer surface of the outer strand of the stranded conductor is pressed by passing a compression die while twisting a wire having the same cross-section and the same diameter in one direction. A method has been proposed in which the outer shape of the stranded wire conductor is deformed into a substantially perfect circle. Hereinafter, this stranded wire conductor is referred to as Prior Art 2.

JP 2000-057852 A

  In the above-described stranded wire conductor of the conventional technique 2, in order to make the outer shape substantially circular, the compression ratio is high ((1−inner diameter of compression die / outer diameter when wires are gathered) × 100). There is a need to do. As described above, when the outer layer strand is deformed at a high compressibility, there is a problem that physical properties such as elongation property, flexibility, flexibility and the like of the stranded wire conductor are impaired.

  Accordingly, the present invention provides a stranded wire conductor composed of 30 core wires, in which the strand is compressed at a lower compressibility than the stranded wire conductor of 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 four core wires are used as a central layer, and an inner layer is formed by surrounding ten core wires around the central layer. A 30-core stranded conductor that forms an outer layer with 16 strands surrounding the outer periphery,
The inner layer or the outer layer is composed of a thin wire and a thick wire, and the other layers are composed of a medium wire,
The diameter of the wire that is the basis of the thin wire is smaller than the diameter of the wire that is the basis of the medium wire, and the diameter of the wire that is the basis of the medium wire is the wire that is the basis of the thick wire. It is characterized by being smaller than the diameter.

The invention according to claim 2 is the invention according to claim 1, wherein the center layer and the outer layer are configured by medium diameter wires,
The inner layer has four large-diameter wires, and in four intervals formed between the adjacent large-diameter wires, one opposing thin-diameter wire is provided in one opposing interval, and the other opposing The interval is provided with two thin wires having a small diameter.

The invention according to claim 3 is the invention according to claim 1, wherein the center layer and the inner layer are constituted by medium diameter wires,
The outer layer has four thick wires, and three thin wires are provided between adjacent thick wires.

Invention of claim 4, characterized in that in the invention of claim 2, wherein, from the center point of the central layer, the distance of each of to the outermost edge of the radial line in constituting the outer layer is the same It is what.

According to a fifth aspect of the present invention, in the third aspect of the invention, the distance from the center point of the central layer to the outermost edge of the large-diameter wire constituting the outer layer and the outermost of the thin-diameter wire constituting the outer layer. distance to the edge is characterized in that it is the same.

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

  Thus, in the case where compression deformation does not occur, the wire rod is not passed through the compression die in the present invention with respect to the stranded wire conductor formed by compression according to the conventional technique 2, that is, the outer layer wire is compressed. The outer shape of the stranded wire conductor can be made into a substantially perfect circle shape without deformation. Therefore, the physical properties of the strands can be maintained without damaging the physical properties such as elongation characteristics, flexibility, and flexibility of the wire, and a highly reliable stranded conductor 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, as compared to a production machine that requires a compression die. Efficiency can be increased.

Further, the maximum outer diameter can be made thinner than the stranded wire conductors of the prior art 1 and 2.
Thus, the outer shape of the stranded wire conductor is substantially perfect circle shape, and as described above, the diameter of the stranded wire conductor can be made smaller than that of the stranded wire conductors of the prior arts 1 and 2, so that the thickness of the insulation coating can be reduced over the entire circumference. It can be made thin and substantially uniform, the amount of insulating material can be reduced, and the cost can be reduced.

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. Schematic which shows the manufacturing method of the strand wire conductor in this invention. The front view of the eyeplate used at the time of manufacture of the strand wire conductor 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. 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 other prior art 1. FIG.

An embodiment for carrying out the present invention will be described with reference to the drawings.
[Example 1]
1 to 3 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 conductor 1 is composed of a total of 30 strands, and the strands include a thin wire (wire) 2, a medium wire (wire) 3, It is composed of three types of large diameter wires (element wires) 4.

  In addition, the stranded wire conductor 1 includes a center layer 11 constituted by four middle-diameter wires 3 located in the center, and a six-core thin wire 2 arranged so as to surround the outer periphery of the center layer 11. And an inner layer 12 formed by a total of 10 cores consisting of four cores 4 and an outer layer 13 formed by 16 cores 3 arranged so as to surround the outer periphery of the inner layer 12. Has been.

  The thin wire 2 is formed on the basis of the first wire 22 having a circular cross section (round shape), and the medium diameter wire 3 is formed on the basis of the second wire material 23 having a circular cross section (round shape). The thick wire 4 is formed on the basis of a third wire 24 having a circular cross section (round shape).

  The diameter of the first wire 22 is smaller than the diameter of the second wire 23, and the diameter of the second wire 23 is smaller than the diameter of the third wire 24.

  As the wires 22 to 24, as in the conventional case, copper wires, copper wires plated with tin, nickel, silver, aluminum wires, various alloy wires, or the like can be used.

  As shown in FIG. 1, the two-core medium-diameter wires 3 are arranged in the horizontal X direction in FIG. 1 so as to contact each other at the center A. The line 3 is arranged, and the central layer 11 is constituted by the medium diameter lines 3 in total of four cores. The medium-diameter lines 3 and 3 disposed in the valleys of the two-core medium-diameter lines 3 are positioned in the longitudinal Y direction in FIG. Are arranged so as to be orthogonal to each other, the adjacent middle diameter wires 3 and 3 are point-contacted in the cross section of FIG. Line contact.

  A total of four large diameter wires 4 are arranged in the valleys of the medium diameter wire 3 constituting the central layer 11 such that one core diameter wire 4 is in contact with the medium diameter wire 3 constituting the central layer 11. Has been. As shown in FIG. 1, there are intervals 16 (17) between the adjacent large-diameter lines 4, 4, and a total of four intervals 16, 17, 16, 17 are formed. One thin wire 2 is disposed in one of the four spaces 16, 16 facing each other, and this one-core thin wire 2 is different from the thick wire 4 as shown in FIG. Although in contact, it is not in contact with the medium-diameter wire 3 constituting the center layer 11. Further, in the other interval 17, 17 facing the other of the four intervals, a two-core thin wire 2 is arranged in the circumferential direction, and the two-core thin wire 2 is formed as shown in FIG. The adjacent large diameter wire 4 is in contact with the medium diameter wire 3 constituting the central layer 11. The inner layer 12 is composed of a total of 4 large diameter wires 4 and a total of 6 thin diameter wires 2.

  As shown in FIG. 1, 16 inner-diameter wires 3 are arranged in the circumferential direction on the outer periphery of the inner layer 12, and the inner-diameter wire 3 is a large-diameter wire constituting an inner layer with the adjacent inner-diameter wire 3. 4 or small diameter wire 2 is in contact.

  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.

Next, a specific application example of the first embodiment will be described.
The diameter d1 of the first wire 22 that is the base of the thin wire 2 is 0.1485 mm, the diameter d2 of the second wire 23 that is the base of the medium wire 3 is 0.1800 mm, and the third wire 3 is the base of the large wire 4. The diameter d3 of the wire rod 24 was set to 0.2385 mm, and the wire rod 24 was compressed with a twist pitch of 10.2 mm and a compression rate lower than that of the prior art 2 to obtain a prototype of the twisted wire conductor 1.

  When this prototype is observed with a microscope, each strand has an adjacent strand and a plurality of contact points. The maximum diameter is 1.1313 mm, and the minimum diameter is 1.026 mm, which is a substantially circular shape. It was. Moreover, the average elongation of the strands constituting the outer layer 13 was 17.6%. The elongation rate of the strands constituting the outer layer in the compressed twisted conductor of the prior art 2 is 4.6%, and it can be seen that the prototype according to this example is of high quality.

  Moreover, the diameter of the prototype of the present example was reduced by about 3.1% from the diameter of the stranded wire conductor 100 of the prior art 1.

  Moreover, the elongation rate of the prototype of this example is higher than that of the stranded wire conductor of the prior art 2, and the prototype has higher physical properties and higher quality than the stranded wire conductor of the prior art 2. I found that it was obtained. This is because the stranded wire conductor of the prior art 2 is compression-molded, whereas the prototype is molded without compression.

  In addition, in order to make the outer shape of the stranded wire conductor 1 closer to a perfect circle shape, compression is performed at the time of manufacturing the stranded wire conductor 1, and from the center A to the outermost edge of each medium diameter wire 3 constituting the outer layer 13. You may form so that distance may become substantially the same. In that case, the outer shape of the stranded wire conductor 1 can be made into a perfect circle shape with a lower compression ratio than that of the stranded wire conductor of the prior art 2. Therefore, even if compression is performed, the outer shape of the stranded wire conductor 1 is more The deterioration of characteristics can be kept low.

  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 made into a substantially perfect circle shape without being compressed, and the strands 2 to 4 can be in contact with all adjacent strands 2 to 4.

  Since the outer shape of the stranded wire conductor 1 is a substantially circular shape and can be made thinner than the stranded wire conductor 100 of the prior arts 1 and 2 as described above, the insulation coating is thinned over the entire outer periphery. And it can be made substantially uniform, the amount of insulating material can be reduced, and the cost can be reduced.

Further, the stranded wire conductor 1 of Example 1 can be formed without the medium diameter wire 3 forming the outer layer 13 being compressed and deformed as compared with the stranded wire conductor of the prior art 2. The physical properties of the wire can be kept high without impairing physical properties such as properties, flexibility, and flexibility, and the highly reliable stranded wire conductor 1 can be obtained.
To do.

Next, a method for manufacturing the stranded wire conductor 1 using a compression die will be described as a reference.
The stranded wire conductor 1 of the present Example 1 is manufactured using the stranded wire machine 32 which has the wire collection port 31 as shown in FIG. A compression die 33 is provided in the concentrating port 31, and an eye plate 35 is provided behind the concentrating port 31. As shown in FIG. 3, 30 wire rod passage holes 35 a, 35 b, and 35 c are formed on the face plate 35 at predetermined intervals on a circle centered on the central axis of the compression die 33. It is formed through.

  In addition, a wire rod supply unit 36 is disposed behind the eye plate 35. The wire rod supply unit 36 has a circular cross-section (round shape) from which the thin wire 2, the medium wire 3, and the large wire 4 are based. One wire 22, second wire 23, and third wire 24 are supplied.

  First, as shown in FIG. 2A, the wire material 23 is supplied from the wire material supply unit 36 to the wire material passage hole 35 b of the eye plate 35. At this time, the wire 23 is supplied to the 16 wire passing holes 35b in the outermost peripheral direction.

  As shown in FIG. 3, the second wire 23 is supplied to the wire passing hole 35b corresponding to the position of the medium diameter wire 3 in FIG.

  The wires 23 that have passed through the wire passing holes 35 b are gathered evenly in the center direction of the eye plate 35, that is, in the center direction of the compression die 33.

  The wires 23 gathered together are supplied to the twisting machine 32. When the wire 23 is supplied to the twisting machine 32, as shown in FIG. 2A, the lead wire 40 is simultaneously supplied so as to be positioned at the center of a circle formed with the wire 23.

  The lead wire 40 has the same diameter as that of the inner layer 12 which is the inner diameter of the outer layer 13. Moreover, the length of the lead wire 40 should just be shorter than the length of the strand 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 22 to 24.

  The wires 22 to 24 are arranged in a predetermined arrangement and pass between the lead wire 40 and the compression die 33 and are twisted in one direction by the twisting machine 32. In addition, the compression rate by the compression die 33 can be set arbitrarily, and the compression die 33 may not be used when compression molding is not performed. The twist pitch is arbitrarily set.

  The wire 23 is compressed and deformed by the compression die 33 and the lead wire 40 to become the medium diameter wire 3 and form the outer layer 13.

  Next, as shown in FIG. 2 (b), the first to third wires 22 to 24 are supplied from the wire supplier 36 to the wire passing holes 35 a to 35 c of the eye plate 35. At this time, the wire rods 22 to 24 are supplied to the four wire rod passage holes 35b in the central portion and the ten wire rod passage holes 35a and 35c provided outside thereof. As shown in FIG. 3, the first wire 22 is supplied to the wire passing hole 35a corresponding to the position of the thin wire 2 in FIG. 1, and the second wire 23 is shown in FIG. As shown in FIG. 3, the third wire 24 is supplied to the wire passing hole 35c corresponding to the position of the thick wire 4 in FIG. 1, as shown in FIG. Is done. In addition, the wire 23 which forms the outer layer 13 continues to be supplied from the wire supply part 36 to the wire passing hole 35b of the eye plate 35 as described above.

  As shown in FIG. 2, the wire rods 22 to 24 are supplied to the wire rod passage holes 35 a to 35 c, and the wire rod 23 that has passed through the wire rod passage holes 35 a to 35 c is the center direction of the eye plate 35, that is, the compression die 33. They are gathered evenly in the center direction.

  The leading edge of the collected wire 23 is connected to the rear end portion of the lead wire 40 by adhesion or the like, and the collected wire 23 is supplied to the place where the lead wire 40 is located.

  The supplied wires 22 to 24 are twisted in one direction by a twisting machine 32 to become a thin wire 2, a medium wire 3 and a thick wire 4 to form the center layer 11 and the inner layer 12.

As described above, the stranded wire conductor 1 using the compression die is continuously formed. When the stranded wire conductor 1 is manufactured without using the compression die and without being compressed and deformed, the compression die 33 and the lead wire 40 are used. The same manufacturing method as above is used.
[Example 2]
FIG. 4 shows a second embodiment of the present invention.

  As shown in FIG. 4, the stranded conductor 41 of the second embodiment is also composed of a total of 30 strands, similar to the stranded conductor 1 of the first embodiment. (Element wire) 2, medium diameter wire (element wire) 3, and thick wire (element wire) 4. In FIG. 4, the hatched lines indicating the cross-sections of the individual wires are omitted in order to avoid complication of the drawing.

  As shown in FIG. 1, the four core middle-diameter wires 3 are arranged so as to be substantially equidistant from the center A and constitute a center layer 42.

  On the outer periphery of the center layer 42, ten inner-diameter wires 3 are arranged in the circumferential direction to form an inner layer 43. As shown in FIG. 4, the medium diameter line 3 is in contact with the adjacent medium diameter line 3 and the medium diameter line 3 constituting the center layer 42.

  On the outer periphery of the inner layer 43, four large-diameter wires 4 are arranged at predetermined intervals, and between the adjacent large-diameter wires 4, 4, three thin-diameter wires 2 are arranged in the circumferential direction. A thick wire 4 and a 12-wire thin wire 2 constitute an outer layer 44.

The manufacturing method of the stranded wire conductor 41 of the second embodiment is the same as that of the stranded wire conductor 1 of the first embodiment.
The diameter d1 of the first wire 22 that is the base of the thin wire 2 is 0.1665 mm, the diameter d2 of the second wire 23 that is the base of the medium wire 3 is 0.1800 mm, and the third wire 3 is the base of the thick wire 4. The diameter d3 of the wire rod 24 was set to 0.2133 mm, and the wire rod 24 was compressed at a twist pitch of 10.2 mm and a compression rate lower than that of the prior art 2 to obtain a prototype of the stranded wire conductor 41.

  When this prototype is observed with a microscope, each strand has an adjacent strand and a plurality of contact points, the maximum diameter is 1.1051 mm, the minimum diameter is 1.1044 mm, and it is a substantially circular shape. It was. Further, the average elongation rate of the strands constituting the outer layer 13 is 19.3%, and the elongation rate of the strands constituting the outer layer in the compressed twisted conductor of the prior art 2 is 4.6%. It was found that the quality was higher than that.

  In addition, in order to make the outer shape of the stranded wire conductor 41 closer to a perfect circle shape, compression is performed when the stranded wire conductor 41 is manufactured, and the distance from the center A to the outermost edge of the large-diameter wire 4 constituting the outer layer 13 The distance from the center A to the outermost edge of the thin wire 2 constituting the outer layer 13 may be formed to be substantially the same.

  The stranded wire conductor 41 of the second embodiment also has the same operations and effects as the first embodiment.

DESCRIPTION OF SYMBOLS 1,41 Twisted wire conductor 2 Thin diameter wire 3 Medium diameter wire 4 Thick diameter wire 11, 42 Center layer 12, 43 Inner layer 13, 44 Outer layer

Claims (5)

30 cores having 4 cores as a central layer, 10 cores surrounding the center layer and forming an inner layer, and 16 cores surrounding the inner layer and forming an outer layer A stranded wire conductor of
The inner layer or the outer layer is composed of a thin wire and a thick wire, and the other layers are composed of a medium wire,
The diameter of the wire that is the basis of the thin wire is smaller than the diameter of the wire that is the basis of the medium wire, and the diameter of the wire that is the basis of the medium wire is the wire that is the basis of the thick wire. A stranded wire conductor characterized by being smaller than the diameter of the wire. The center layer and the outer layer are composed of medium diameter wires,
The inner layer has four large-diameter wires, and in four intervals formed between the adjacent large-diameter wires, one opposing thin-diameter wire is provided in one opposing interval, and the other opposing The stranded wire conductor according to claim 1, wherein a thin core wire having two cores is provided in the interval. The center layer and the inner layer are composed of medium diameter wires,
The stranded wire conductor according to claim 1, wherein the outer layer has four large-diameter wires, and three thin-diameter wires are provided between the adjacent large-diameter wires.   3. The stranded wire conductor according to claim 2, wherein the distance from the center point of the center layer to the outermost edge of the medium-diameter wire constituting the outer layer is the same.   The distance from the center point of the central layer to the outermost edge of the large-diameter wire constituting the outer layer is the same as the distance from the outermost edge of the thin-diameter wire constituting the outer layer. Item 3. A stranded wire conductor according to item 3.

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