JP2006228747A - Wire rod, manufacturing method of wire rod and manufacturing device of wire rod - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil capable of obtaining high efficiency even in the same size as conventional ones, a wire rod to obtain a coil assembly from, a manufacturing method of the wire rod, and a manufacturing device of the wire rod. <P>SOLUTION: The wire rod 12 has given unit parts consecutively formed. The unit part has a smaller cross section at one end than at the other, a cross-section area of each part consecutively decreasing as a height hc2 of a cross section of each part gets down to a height hc1 from that other end toward a direction of that one end, and the unit parts are continued as either one smaller cross-section end is connected with another or one larger cross-section end is connected with another, directly or indirectly. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wire used for a coil or the like used for electric and electronic parts, a manufacturing method thereof, and the like.

  Conventionally, a coil assembly including a coil and a magnetic core part for forming a magnetic field circuit together with the coil has been used in electrical parts and electronic parts, particularly in parts such as a transformer using a coil.

  FIGS. 22A and 22B show such a conventional coil assembly. As shown in FIG. 22B, the coil assembly 300 includes a coil 310, a central portion 320 provided at the center of the coil 310, an outer edge portion 330 provided on the outer side of the coil 310, and a central portion 320. The magnetic core part 350 which has the bridge part 340 which connects the outer edge part 330 is provided. In FIG. 22A, the upper half of the magnetic core portion 350 is omitted in order to describe the coil 310.

  Moreover, as shown to Fig.22 (a), the coil 310 is what is called an alpha coil which has a pair of upper and lower spiral parts which innermost circumferences connected. The coil 310 has an end 311a for connecting to other components from the outermost periphery of the upper spiral portion 310a, and an end 311b for connecting to other components from the outermost outer periphery of the lower spiral portion 311b. Each is growing.

  Such a coil assembly is mainly used for a communication device, a transformer of a base station of a mobile phone or a mobile communication terminal, and the like.

  However, such a coil assembly has the following problems. That is, the ability of the coil 310 used in the coil assembly 300 mainly depends on the width, thickness, length, and number of windings of the wire used for the winding.

  Therefore, it has been difficult to obtain further improvement in efficiency with coils of the same size.

  Further, when the coil assembly 300 is mounted in another device, it is necessary to bend the end portions 311a and 311b to the bottom surface or the top surface of the magnetic core portion 350 as shown in FIG. There was a problem that the coil assembly 300 was made taller by the thickness of the wound winding.

  The present invention has been made in view of the above problems, and is a coil capable of obtaining high efficiency even with the same dimensions as conventional ones, a wire rod for obtaining a coil assembly, a wire rod manufacturing method, and a wire rod manufacturing apparatus. The purpose is to provide.

In order to achieve the above object, the first aspect of the present invention is a wire in which predetermined unit portions are continuously formed,
The unit part is
The cross-sectional area at one end is smaller than the cross-sectional area at the other end, and the cross-sectional area at each portion is continuously reduced by decreasing the height or width of the cross-section at each portion from the other end toward the one end. There,
Each unit is a wire that is continuous by connecting the one end and the other end directly or indirectly.

  The second aspect of the present invention is the wire according to the first aspect of the present invention, wherein the one end and / or the other end are indirectly connected through a predetermined length portion having a constant cross-sectional area.

  Moreover, 3rd this invention is a wire of 1st this invention whose cross-sectional shape is a rectangle.

  The fourth aspect of the present invention is the wire according to the first aspect of the present invention, wherein the cross-sectional shape is either substantially circular or substantially elliptical.

  The fifth aspect of the present invention is the wire according to any one of the first to fourth aspects of the present invention, the surface of which is coated with an insulating film.

  Moreover, 6th this invention is a wire of 5th this invention in which the said insulating film is formed by electrodeposition coating.

According to a seventh aspect of the present invention, a strand having a predetermined wire diameter is inserted between a pair of molding rollers rotating at a predetermined speed, and the cross-sectional shape of the strand is set between the pair of molding rollers. A method for producing a wire according to the first aspect of the present invention, wherein the wire is pressure-molded into a cross-sectional shape of the wire,
A concave groove corresponding to a part of the cross-sectional shape of the wire is formed on the contact surface of the one molding roller with the element wire in the pair of molding rollers,
The contact surface of the other molding roller with the element wire forms the remaining part of the cross-sectional shape, and the center of the circumference of the bottom surface portion of the concave groove in the one molding roller is the one molding It is a manufacturing method of the wire which is eccentric with respect to the rotation center of a roller.

  In the eighth aspect of the present invention, the insertion speed of the wire is kept slower than the tangential speed of the pair of molding rollers, and the center of the circumference of the bottom surface portion of the concave groove in the one molding roller is The wire rod manufacturing method according to the seventh aspect of the present invention is continuously changed so as to be the slowest when it is closest to the other molding roller and the fastest when it is the farthest from the other molding roller.

  In the ninth aspect of the present invention, at least the center of the circumference of the bottom surface portion of the concave groove in the one molding roller is closest to the other molding roller and the farthest from the other molding roller. The wire manufacturing method according to the eighth aspect of the present invention applies a predetermined stress to the element wire in a direction opposite to the insertion direction.

According to a tenth aspect of the present invention, the concave groove of the one molding roller has a predetermined length portion having the same depth as viewed from the contact point between the one molding roller and the other molding roller. And
The predetermined length portion is provided at a location including a line connecting the center of the circumference of the bottom surface portion of the concave groove and the rotation center of the one molding roller,
The place is the manufacturing method of a wire rod according to a seventh aspect of the present invention, wherein the place is a position from a rotation center of the one molding roller and / or a position from a center of a circumference of a bottom surface portion of the concave groove.

In the eleventh aspect of the present invention, the one molding roller has a protrusion at a predetermined position of the groove shape,
The predetermined position is on a line connecting the center of the circumference of the bottom surface portion of the concave groove and the rotational center of the one molding roller, and the position from the rotational center of the one molding roller and / or the concave groove. The position from the center of the circumference of the bottom part of
The protrusion is the manufacturing method of the wire according to the seventh or tenth aspect of the present invention, wherein a concave portion is engraved on the wire press-molded on the wire.

In a twelfth aspect of the present invention, a strand having a predetermined wire diameter is inserted between a pair of molding rollers rotating at a predetermined speed, and the cross-sectional shape of the strand is set between the pair of molding rollers. A method for producing a wire according to the first aspect of the present invention, wherein the wire is pressure-molded into a cross-sectional shape of the wire,
A concave groove corresponding to a part of the cross-sectional shape of the wire is formed on the contact surface of the one molding roller with the element wire in the pair of molding rollers,
The other molding roller in the pair of molding rollers has a width substantially the same as the width of the concave groove, and a convex portion corresponding to the remaining part of the cross-sectional shape of the wire is formed,
A method of manufacturing a wire material, wherein a distance between a rotation center of the one molding roller and a rotation center of the other molding roller is changed by a predetermined size at a period corresponding to a synchronized rotation of the pair of molding rollers. It is.

  In the thirteenth aspect of the present invention, the change may be caused when the rotation center of the one molding roller and the rotation center of the other molding roller are closest to each other and / or the rotation center of the one molding roller and the rotation center of the one molding roller. The wire rod manufacturing method according to the twelfth aspect of the present invention is stopped for a predetermined time including the time when the rotation center of the other forming roller is farthest and continuously executed for the remaining time.

  In the fourteenth aspect of the present invention, the wire insertion speed is kept slower than the tangential speed of the pair of molding rollers, and the rotation center of the one molding roller and the rotation center of the other molding roller. 12th or 13th aspect of the present invention, in which the rotation center of the one molding roller and the rotation center of the other molding roller are changed to be the earliest when they are closest to each other. It is a manufacturing method of this wire.

  Further, the fifteenth aspect of the present invention is that at least the rotation center of the one molding roller and the rotation center of the other molding roller are closest to each other, and the rotation center of the one molding roller and the other molding roller The wire manufacturing method according to the fourteenth aspect of the present invention, wherein a predetermined stress is applied to the element wire in the direction opposite to the insertion direction when the rotation center is farthest.

In the sixteenth aspect of the present invention, the one molding roller has a protrusion at a predetermined position of the concave groove shape.
The predetermined position is on a line connecting the rotation center of the one molding roller and the rotation center of the other molding roller, and the rotation center of the one molding roller and the rotation center of the other molding roller are When the closest approach and / or when the rotation center of the one molding roller and the rotation center of the other molding roller are most distant from each other, the position facing the other roller,
The protrusion is the manufacturing method of the wire according to the twelfth or thirteenth aspect of the present invention, wherein a concave portion is engraved on the wire press-molded on the wire.

  According to a seventeenth aspect of the present invention, the pair of molding rollers rotate synchronously, and the width of the concave groove and / or convex portion is along the circumference of the one molding roller and / or the other molding roller. It is a manufacturing method of the wire of the 7th or 12th present invention which changes continuously.

According to an eighteenth aspect of the present invention, a strand having a predetermined wire diameter is inserted between a pair of molding rollers rotating at a predetermined speed, and the cross-sectional shape of the strand is set between the pair of molding rollers. The wire rod manufacturing apparatus according to the first aspect of the present invention, wherein the wire rod is pressure-molded into a cross-sectional shape of the wire rod,
A concave groove corresponding to a part of the cross-sectional shape of the wire is formed on the contact surface of the one molding roller with the element wire in the pair of molding rollers,
The contact surface of the other molding roller with the element wire forms the remaining part of the cross-sectional shape, and the center of the circumference of the bottom surface portion of the concave groove in the one molding roller is the one molding It is a manufacturing apparatus of the wire which is eccentric with respect to the rotation center of a roller.

  In the nineteenth aspect of the present invention, the insertion speed of the strand is kept slower than the tangential speed of the pair of molding rollers, and the center of the circumference of the bottom surface portion of the concave groove in the one molding roller is The wire rod manufacturing apparatus according to the eighteenth aspect of the present invention is continuously changed so as to be the slowest when it is closest to the other molding roller and the fastest when it is farthest from the other molding roller.

  In the twentieth aspect of the present invention, at least the center of the circumference of the bottom surface portion of the concave groove in the one molding roller is closest to the other molding roller, and is farthest from the other molding roller. The wire manufacturing apparatus according to the nineteenth aspect of the present invention applies a predetermined stress to the element wire in a direction opposite to the insertion direction.

According to a twenty-first aspect of the present invention, the concave groove of the one molding roller has a predetermined length portion having the same depth when viewed from the contact point between the one molding roller and the other molding roller. And
The predetermined length portion is provided at a location including a line connecting the center of the circumference of the bottom surface portion of the concave groove and the rotation center of the one molding roller,
In the eighteenth aspect of the present invention, the place is a position from the rotation center of the one molding roller and / or a position from the center of the circumference of the bottom surface portion of the concave groove.

In the twenty-second aspect of the present invention, the one molding roller has a protrusion at a predetermined position of the concave groove shape.
The predetermined position is on a line connecting the center of the circumference of the bottom surface portion of the concave groove and the rotational center of the one molding roller, and the position from the rotational center of the one molding roller and / or the concave groove. The position from the center of the circumference of the bottom part of
The protrusion is the wire manufacturing apparatus according to the eighteenth or twenty-first aspect of the present invention, in which a concave portion is engraved on a wire press-molded on the wire.

According to a twenty-third aspect of the present invention, a strand having a predetermined wire diameter is inserted between a pair of molding rollers rotating at a predetermined speed, and the cross-sectional shape of the strand is set between the pair of molding rollers. The wire rod manufacturing apparatus according to the first aspect of the present invention, wherein the wire rod is pressure-molded into a cross-sectional shape of the wire rod,
A concave groove corresponding to a part of the cross-sectional shape of the wire is formed on the contact surface of the one molding roller with the element wire in the pair of molding rollers,
The other molding roller in the pair of molding rollers has a width substantially the same as the width of the concave groove, and a convex portion corresponding to the remaining part of the cross-sectional shape of the wire is formed,
An apparatus for manufacturing a wire material, wherein a distance between a rotation center of the one molding roller and a rotation center of the other molding roller is changed by a predetermined size at a period corresponding to a synchronized rotation of the pair of molding rollers. It is.

  Further, in the twenty-fourth aspect of the present invention, the change is caused when the rotation center of the one molding roller and the rotation center of the other molding roller are closest to each other and / or the rotation center of the one molding roller and the rotation center. The wire rod manufacturing apparatus according to the twenty-third aspect of the present invention is stopped for a predetermined time including the time when the rotation center of the other forming roller is farthest and continuously executed for the remaining time.

  According to a twenty-fifth aspect of the present invention, the wire insertion speed is kept slower than the tangential speed of the pair of molding rollers, and the rotation center of the one molding roller and the rotation center of the other molding roller. The twenty-third or twenty-fourth aspect of the present invention changes the speed so that the rotation speed of the one molding roller and the rotation center of the other molding roller are the fastest when the closest to each other. It is a manufacturing apparatus of the wire.

  According to a twenty-sixth aspect of the present invention, at least the rotation center of the one molding roller and the rotation center of the other molding roller are closest to each other, and the rotation center of the one molding roller and the other molding roller A wire rod manufacturing apparatus according to a twenty-fifth aspect of the present invention, wherein a predetermined stress is applied to the element wire in a direction opposite to the insertion direction when the rotation center is farthest.

According to a twenty-seventh aspect of the present invention, the one molding roller has a protrusion at a predetermined position of the concave groove shape,
The predetermined position is on a line connecting the rotation center of the one molding roller and the rotation center of the other molding roller, and the rotation center of the one molding roller and the rotation center of the other molding roller are When the closest approach and / or when the rotation center of the one molding roller and the rotation center of the other molding roller are most distant from each other, the position facing the other roller,
The protrusion is the wire manufacturing apparatus according to the twenty-third or twenty-fourth aspect of the present invention, in which a concave portion is engraved on a wire press-molded on a wire.

  In a twenty-eighth aspect of the present invention, the pair of forming rollers rotate synchronously, and the width of the concave groove and / or convex portion is along the circumference of the one forming roller and / or the other forming roller. It is the manufacturing apparatus of the wire of the 18th or 23rd aspect of this invention which is changing continuously.

  As is apparent from the above description, according to the present invention, the wire, the wire rod used in the coil, the coil assembly, etc. operating with high efficiency by reducing the resistance value with the same dimensions as the conventional one, the wire rod manufacturing method, the manufacturing apparatus, etc. Can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIGS. 1A to 1D are diagrams showing a configuration of a coil assembly according to Embodiment 1 of the invention related to the present invention. As shown in FIG. 1A, a coil assembly 1 corresponding to the coil assembly of the invention related to the present invention includes a rectangular wire coil 10 corresponding to the coil of the invention related to the present invention, and a rectangular wire coil 10. And a magnetic core portion 20 corresponding to the magnetic core portion of the invention related to the present invention.

  1B is a plan view of the coil assembly 1, FIG. 1C is a schematic cross-sectional view taken along the line AA ′ of FIG. 1B, and FIG. It is a schematic cross section by the BB 'straight line of b). As shown in FIG. 1 (c), the magnetic core portion 20 is provided at the center portion of the rectangular wire coil 10, that is, at the inner side from the innermost circumference, and a central portion 21 corresponding to the central portion of the invention related to the present invention. And an outer edge portion 22 corresponding to the outer edge portion of the invention related to the present invention, and the central portion 21 and the outer edge portion 21, which are provided on the outer edge of the flat wire coil 10, and the invention related to the present invention. It is comprised from the bridge part 23 equivalent to a bridge part. Further, the magnetic core portion 20 is composed of a pair of magnetic core members 20a and 20b that are divided into two in a direction parallel to the winding direction of the flat wire coil 10, and the flat wire coil 10 is sandwiched between the magnetic core members 20a and 20b. Yes.

  Next, FIGS. 2A to 2C are views showing the configuration of the rectangular wire coil 10, in which FIG. 2A is a perspective view, FIG. 2B is a plan view, and FIG. FIG. 2C is a schematic cross-sectional view taken along the line AA ′ in FIG.

  While describing the coil assembly of this Embodiment which has such a structure, the coil of the invention relevant to this invention and the wire of this invention are demonstrated.

  First, the flat wire coil 10 will be described. As shown in FIGS. 2 (a) and 2 (b), the rectangular wire coil 10 is a so-called alpha-coiled coil having a pair of spiral portions 10a and 10b whose innermost circumferences are connected to each other, and the outermost circumference of the spiral portion 10a. From the outermost periphery of the spiral part 10b, the end part 11b for connecting to another part extends from the outermost periphery of the spiral part 10b. However, in FIG.2 (b), the spiral part 10b was shown with the dotted line. The spiral portions 10a and 10b correspond to a pair of spiral portions of the invention related to the present invention.

  Further, as shown in FIG. 2 (c), the windings of the rectangular wire coil 10 have a structure in which the width is uniform, but the thickness gradually increases from the inner periphery toward the outer periphery. The thicknesses of both ends 11a and 11b are the same.

  Next, FIG. 3A is a plan view of the wire 12 corresponding to the winding of one rectangular wire coil 10, and FIG. 3B is a side view thereof. As shown in the figure, the wire 12 has a configuration in which the width is the same in each part, the thickness is the thinnest at the center, and gradually increases toward both ends. In the drawing, the portions corresponding to the thickness in the coil cross-sectional view of FIG. 2C are shown as thin portions hc1 and thick portions hc2, respectively. Note that both ends of the wire 12 correspond to both end portions 11 a and 11 b of the coil 10.

  The rectangular wire coil 10 can have a larger cross-sectional area of the outer peripheral winding than the inner peripheral winding as the number of turns of the coil increases. Therefore, the number of turns and the outer shape are the same. In this case, the coil resistance can be reduced and higher efficiency can be obtained than a conventional coil having the same cross-sectional area.

  Table 1 shows a comparison between a conventional rectangular wire coil using windings of the same width and thickness and a rectangular wire coil of this embodiment using windings of the same width and different thickness. However, the shape of the rectangular wire coil is the same as the example shown in FIGS. In both the conventional example and the coil of this embodiment, the number of turns and the length of the winding are the same, but the rectangular wire coil of this embodiment has a smaller resistance value. Therefore, when a transformer is created with this coil, it is possible to reduce power consumption.

なお、表において、巻線の材質として銅を用いた。銅の物理的な電気抵抗値は１．６９４Ω・cm１０^-6であるが、コイル、電気製品に用いる銅の抵抗値は、φ２の銅線の場合、スケアは３．１４２ｍｍ^２で５．４８８（Ω／ｋｍ、２０℃下における）であって、この値を表１の基準とした。また、スケア３ｍｍ^２の場合の抵抗値は５．７５（Ω／ｋｍ、２０℃下における）である。

In the table, copper was used as the material of the winding. The physical electrical resistance value of copper is 1.694 Ω · cm10 ⁻⁶ , but the resistance value of copper used in coils and electrical products is 3.488 mm ² at 5.482 mm for a copper wire of φ2. Ω / km (under 20 ° C.), and this value was used as a reference in Table 1. In addition, the resistance value in the case of a scare of 3 mm ² is 5.75 (Ω / km at 20 ° C.).

  Thus, it can be seen that the rectangular coil coil of this embodiment can be reduced by about 34% compared to the conventional example of 3.61Ω, which is 2.36Ω.

  Second, the magnetic core will be described. As shown in FIG. 1 (c), the bridge portion 23 has a configuration in which the thickness gradually decreases from the central portion 21 toward the outer edge portion 22, and becomes the thinnest dimension immediately before the outer edge portion 21. is doing. As a result, the space surrounded by the central portion 21, the outer edge portion 22, and the bridge portion 23 has a substantially wedge-shaped cross section taken along the line AA ′ in the figure, and is similar to the cross sectional shape of the rectangular wire coil 10. The space factor of the rectangular wire coil inside the magnetic core portion 20 can be increased, and a coil assembly without waste can be obtained.

  Furthermore, in the present embodiment, as shown in FIGS. 1A and 1B, the bridge portion 23 of the magnetic core portion 20 gradually increases in width from the central portion 21 toward the two outer edge portions 21. Thus, it has a configuration with the maximum width immediately before the outer edge portion 21. This is due to the following reason. The burden of the magnetic field circuit generated by the flat wire coil 10 needs to be equal to one half of the magnetic core portion 20. On the other hand, when only the thickness of the bridge portion 23 is changed, the cross-sectional area of the bridge portion 23 decreases as the distance from the center portion 21 increases. In order to prevent this, the bridge portion 23 is configured to reduce the thickness and become wider as the distance from the center portion 21 increases.

  Here, FIGS. 4A to 4C show the relationship among the cross-sectional areas of the central portion 21, the outer edge portion 22, and the bridge portion 23 in the magnetic field portion 20. 4B is a schematic cross-sectional view taken along the line AA ′ in FIG. 4A, and FIG. 4C is a schematic cross-sectional view taken along the line BB ′ in FIG. As shown in FIG. 4A, the cross-sectional areas of the central portion 21 and the outer edge portion 22 corresponding to the magnetic field circuit formed by the rectangular wire coil 10 are S1 and S2, respectively. Further, FIG. 4B and FIG. ), The cross-sectional areas of the bridge portion 23 are respectively S3 and S4, and there is a relationship of S1 = S2 = S3 = S4 between the cross-sectional areas. Thereby, the burden of the magnetic circuit can be equalized in the magnetic core part 20.

  As described above, the coil assembly of the present embodiment can operate a coil having a high space factor and a low coil resistance with high efficiency.

  In the above-described embodiment, the coil of the invention related to the present invention is described as the rectangular wire coil 110. However, the coil of the invention related to the present invention has at least the outermost winding side winding. It is sufficient if the cross-sectional area is larger than the cross-sectional area of the innermost winding. Therefore, it is not limited to a flat wire, and may be a winding whose cross section has a shape such as a circle, an ellipse, a polygon, or a rectangle. At this time, the cross-sectional area of both end portions (corresponding to the end portion 11a and end portion 11b in FIG. 1) serving as the lead wire portion of the coil is kept the same as the cross-sectional area of the outermost winding. Is desirable. Further, a coil having another winding shape may be used instead of the so-called alpha winding coil.

  In addition, as shown in FIG. 23, the coil used in the coil assembly of the invention related to the present invention and the coil of the invention related to the present invention are generally thicker on the outer peripheral side than on the inner peripheral side, The individual windings may be such that the sides facing each other between adjacent perimeters have substantially the same thickness. However, FIG. 23 is a partial cross-sectional view corresponding to the cross-sectional view of FIG. In this case, unlike the example shown in FIG. 2C, there is no step between adjacent windings, so that the occupation ratio in the magnetic core can be further increased.

(Embodiment 2)
5 (a) to 5 (e) are diagrams showing the configuration of the coil assembly according to the second embodiment of the invention related to the present invention. As shown in FIG. 5 (a), the coil assembly 2 includes a multiple one-time winding coil 30 corresponding to a plurality of one-time winding coils arranged on concentric circles of the invention related to the present invention, and a multiple one-time winding. It has a magnetic core portion 40 corresponding to the magnetic core portion of the invention related to the present invention, which is configured to house the coil 30.

  5 (b) is a plan view of the coil assembly 1, FIG. 5 (c) is a schematic cross-sectional view taken along the line AA 'of FIG. 1 (b), and FIG. It is a schematic cross section by the BB 'straight line of b). As shown in FIG. 5 (c), the magnetic core portion 40 is provided at the central portion of the multiple one-way winding coil 30, that is, the central portion corresponding to the central portion of the invention related to the present invention provided on the inner side of the innermost circumference. In the present invention, the portion 41, the outer edge portion 42 corresponding to the outer edge portion of the invention related to the present invention, and the central portion 41 and the outer edge portion 42, which are provided on the outer edge of the multiple one-time winding coil 30, are connected. And a bridge portion 43 corresponding to the bridge portion of the related invention. Further, the magnetic core portion 40 is composed of magnetic core members 40a and 40b that are divided into two in a direction parallel to the winding direction of the multiple once-turned coil 30, and the multiple once-turned coil 30 is sandwiched between the magnetic core members 40a and 40b. It is.

  The coil assembly of this embodiment having such a configuration will be described.

  As shown in FIGS. 5A to 5D, the windings of the multiple one-time winding coil 30 have a uniform width and a plurality of thicknesses that gradually increase from the inner peripheral side toward the outer periphery. The single-turned rectangular wire coils 30a to 30d are provided. However, the heights of the single-turned rectangular coils 30a to 30d are uniform on the upper surface, and the difference in thickness appears on the lower surface.

  The single-turned flat wire coil 30a is arranged so as to go around the central portion 41 substantially once, the single-turned flat wire coil 30b is arranged so as to go around the single turn flat wire coil 30b, and so on. The outer peripheral side single-turned rectangular wire coil is arranged concentrically so as to run around the inner peripheral side rectangular wire coil. As with the rectangular coil 10 of the first embodiment, this can reduce coil resistance and obtain higher efficiency than a conventional coil having the same cross-sectional area.

  Further, in the magnetic core portion 40, as shown in FIG. 5C, the magnetic core members 40a and 40b have the same shape as the magnetic core members 21a and 21b on the side surfaces, and the bridge portion 43 is The thickness is gradually reduced from the central portion 41 toward the outer edge portion 42, and the thickness becomes the thinnest immediately before the outer edge portion 42. As a result, the space surrounded by the central portion 41, the outer edge portion 42, and the bridge portion 43 has a substantially wedge-shaped cross section taken along the line AA ′ in the drawing, and is similar to the cross sectional shape of the multiple one-time winding coil 30. become. Such a multiple one-time winding coil 30 can increase the space factor inside the magnetic core portion 40, and the same effect as in the first embodiment can be obtained.

  Further, as shown in FIG. 5B, the top surface has the same shape as the magnetic core members 21a and 21b of the first embodiment, and the bridge portion 43 is directed from the central portion 41 toward the two outer edge portions. The width is gradually increased, and the maximum width is obtained immediately before the outer edge portion 42. This is to equalize the burden on the magnetic circuit in the magnetic core portion 40 as in the first embodiment.

  As described above, the coil assembly of the present embodiment has a high space factor even in a coil obtained by multiplexing a single-turned coil, and can operate a coil with low coil resistance with high efficiency. It is.

  In the above description, the winding of the multiple single-turning coil 30 is composed of the single-turning rectangular wire coils 30a to 30d whose heights are aligned on the upper surface, but FIG. As shown in FIG. 4, the thickness may be changed on both the upper surface and the lower surface. In this case, a coil assembly combined with the magnetic core portion 20 (magnetic core members 20a and 20b) of the first embodiment is obtained as the magnetic core portion.

  Further, in the above-described embodiment, the description has been given on the assumption that the plurality of coils of the invention related to the present invention are the multiple one-stroke coils 30, but the plurality of single-stroke coils of the invention related to the present invention are It is sufficient that at least the outermost winding has a cross-sectional area larger than that of the innermost winding. Therefore, it is not limited to a flat wire, and may be a winding whose cross section has a shape such as a circle, an ellipse, a polygon, or a rectangle.

  Further, as shown in FIG. 24, the coil used in the coil assembly of the invention related to the present invention and the coil of the invention related to the present invention are generally thicker on the outer peripheral side than on the inner peripheral side, as shown in FIG. The windings 30a to 30d of each one-time winding coil may be such that the sides facing each other between adjacent circumferences have substantially the same thickness. However, FIG. 24 is a partial cross-sectional view corresponding to the cross-sectional view of FIG. In this case, unlike the example shown in FIG. 5D, there is no step between adjacent windings, so that the occupation ratio in the magnetic core can be further increased.

(Embodiment 3)
6A is a perspective view of a rectangular coil 50 according to Embodiment 3 of the invention related to the present invention, and FIG. 6B is a cross-sectional view taken along line AA ′ of FIG. FIG.6 (c) is a figure which shows the structure of the coil assembly in Embodiment 3 of the invention relevant to this invention. However, the same or corresponding parts as in FIG.

  The flat wire coil 50 will be described. As shown in FIGS. 6 (a) and 6 (b), a rectangular wire coil 50 corresponding to a coil wound in a direction parallel to the winding axis direction of the invention related to the present invention has a spiral shape, and its innermost An end 50a for connecting to other components extends from the periphery, and an end 50b for connecting to other components extends from the outermost periphery.

  Further, as shown in FIG. 6B, the windings of the flat wire coil 50 are uniform in width, but gradually increase in thickness from the inner periphery (thickness hc2 ') toward the outer periphery. It has a configuration (thickness hc1 ′) that is maximized at the outer periphery. However, the height of each turn is uniform on the upper surface, and the difference in thickness appears on the lower surface. In the drawing, only one of the cross sections of the rectangular wire coil 50 is shown, but the other is not shown because it has a substantially symmetrical shape.

  Next, FIG. 7A is a plan view of the wire 12 corresponding to the winding of one rectangular wire coil 50, and FIG. 3B is a side view thereof. As shown in the figure, the wire 51 has the same width in each part, one end is the thinnest (thickness t1), gradually increases toward the other end, and gives the maximum thickness at the other end. It has a (thickness t2) configuration. Therefore, the thickness of the end portion 50a is t1, and the thickness of the end portion 50b is t2.

  In such a rectangular coil 50, the larger the number of turns of the coil, the larger the cross-sectional area of the outer winding can be made larger than the cross-sectional area of the inner winding, and the winding number and the outer shape are the same. In this case, the coil resistance can be reduced and higher efficiency can be obtained than the conventional coil having the same cross-sectional area.

  A coil assembly having a high space factor can be obtained by combining such a rectangular coil with the magnetic core portion 40 similar to that of the second embodiment.

  In the above description, the windings of the rectangular wire coil 50 are assumed to have the same height on the upper surface, but may have a configuration in which a change in thickness appears on both the upper surface and the lower surface. In this case, as in the case of the second embodiment, a coil assembly combined with the magnetic core portion 20 (magnetic core members 20a and 20b) of the first embodiment is obtained as the magnetic core portion.

  Also, in the figure, the rectangular wire coil 50 is rotated 90 degrees, and the arrangement of the rectangular wire coil 50 and the magnetic core portion 40 is such that one of the outer edge portions 42 is sandwiched between both end portions 50a, 50b. As in the first and second embodiments, the arrangement may be such that the outer edge portion 42 is not sandwiched. Further, the arrangement of the rectangular wire coils shown in FIG. 6 may be implemented in the first and second embodiments.

  In the above-described embodiment, the coil of the invention related to the present invention has been described as the rectangular wire coil 50. However, the coil of the invention related to the present invention has at least the outermost winding side winding. It is sufficient if the cross-sectional area is larger than the cross-sectional area of the innermost winding. Therefore, it is not limited to a flat wire, and may be a winding whose cross section has a shape such as a circle, an ellipse, a polygon, or a rectangle.

  Further, as shown in FIG. 25, the coil used in the coil assembly of the invention related to the present invention and the coil of the invention related to the present invention are generally thicker on the outer peripheral side than on the inner peripheral side, as shown in FIG. The individual windings may be such that the sides facing each other between adjacent perimeters have substantially the same thickness. FIG. 25 is a partial cross-sectional view corresponding to the cross-sectional view of FIG. In this case, unlike the example shown in FIG. 6B, there is no step between adjacent windings, so that the occupation ratio in the magnetic core can be further increased.

(Embodiment 4)
FIGS. 8A to 8C are diagrams showing the configuration of the coil assembly according to the fourth embodiment of the invention related to the present invention. In the figure, the same or corresponding parts as in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in each drawing, the coil assembly 60 has a rectangular wire coil 70 and a magnetic core portion 20 that is shaped to accommodate the rectangular wire coil 60.

  8A is a plan view of the coil assembly 1, FIG. 8C is a schematic cross-sectional view taken along the line AA ′ of FIG. 1B, and FIG. It is a schematic cross section by the BB 'straight line of b).

  The flat wire coil 70 will be described. As shown in FIG. 8 (a), the rectangular wire coil 70 corresponding to the coil of the invention related to the present invention has a pair of spiral portions 70a and 70b whose innermost circumferences are connected to each other like the rectangular wire coil 10. The so-called alpha winding coil has an end 71a for connecting to other components from the outermost periphery of the spiral portion 10a, and an end 71b for connecting to other components from the outermost periphery of the spiral portion 70b. Each is growing. However, in FIG.8 (c), the spiral part 70b was shown with the dotted line. However, unlike the flat wire coil 10, the flat wire coil 70 has the same winding width and thickness as in the conventional example.

  Secondly, since the magnetic core part 20 is the same as that of the first embodiment, a detailed description thereof is omitted.

  Furthermore, in the present embodiment, as shown in FIGS. 8B and 8C, a cross-section corresponding to the spacer member of the invention related to the present invention is provided between the spiral portions 70a and 70b of the flat wire coil 70. Equilateral triangular taper washers 80a and 80b are inserted, and the spiral portions 70a and 70b are expanded from the innermost periphery of the flat wire coil 70, and the two main surfaces of the spiral portions 70a and 70b that are not opposed to each other. Is in close contact with the outer wall of the magnetic core portion 20.

  Here, FIGS. 9A to 9C show configurations of the taper washers 80a and 80b. As shown in the figure, the taper washers 80a and 80b have substantially the same shape as that of the flat wire coil 70 for the time being, and are inserted into almost the entire boundaries of the spiral portions 70a and 70b.

  In such a configuration of the present embodiment, it is not always necessary to prepare a coil having a shape corresponding to the space in the magnetic core portion, and there is an effect that the degree of freedom in design can be increased.

  Further, in the present embodiment, the distance between the spiral portions 70a and 70b is increased and reaches the same size as the outer edge portion 22. As a result, the center pole portion of the magnetic circuit including the central portion 21 extends, and there is an effect of preventing the magnetic flux from concentrating at one point in the magnetic core portion 20.

  In the above description, the taper washers 80a and 80b are inserted between the spiral portions 70a and 70b over almost the entire surface of the coil. However, as a spacer member of the invention related to the present invention, A paper spacer 99 shown in FIGS. 10A to 10C may be used. This can fold paper, resin, fiber, etc. in half and produce the same effect as the taper washer 80a by the repulsive force. The paper spacer 99 does not need to be disposed on the entire surface of the coil, and it is sufficient that the spiral portions 70a and 70b are pushed and spread so that each main surface can be brought into close contact with the outer wall of the magnetic core portion 20.

  As described above, the coil assembly according to the present embodiment increases the degree of freedom of the coil used in combination with the magnetic core part and reduces the capacitance generated between the pair of spiral parts, particularly when used for a high voltage. There is an advantage that current flows easily.

  Further, although the potential difference between both ends of the coil component increases, there is an insulating effect that prevents both ends from being short-circuited.

  In the above description, the coil having a pair of spiral portions where the innermost circumferences are connected to each other has been described as an example. However, the coil of the invention related to the present invention includes a plurality of the above-described coils connected at the outermost circumferences. A coil having a plurality of a pair of spiral portions, that is, a pair of spiral portions in which innermost circumferences are connected to each other, is not limited to a rectangular wire, and a winding having a cross-sectional shape such as a circle, an ellipse, a polygon, and a rectangle. It may be a line. Further, a coil having another winding shape may be used instead of the so-called alpha winding coil.

(Embodiment 5)
11 (a) and 11 (b) are diagrams showing the configuration of the coil core member in the fifth embodiment of the invention related to the present invention. As shown in FIG. 11A, the core member 90 corresponding to the core member of the invention related to the present invention is provided so as to correspond to the inner side of the innermost circumference when the coil is arranged. A shaft portion 91 corresponding to the shaft portion of the invention related to the invention, a side wall portion 92 corresponding to the side wall portion of the invention related to the present invention provided so as to correspond to the outside of the outermost periphery of the coil, and the shaft portion 91 and the side wall part 92 are comprised from the bridge part 93 equivalent to the bridge | bridging of the invention relevant to this invention.

  The core member of the present embodiment having such a configuration will be described, and the coil assembly of the invention related to the present invention will be described.

  As shown in FIG. 11B, the bridge portion 93 has a configuration in which the thickness gradually decreases from the shaft portion 91 toward the side wall portion 92 and becomes the thinnest dimension immediately before the side wall portion 92. is doing. As shown in FIG. 12A, the end of the flat wire coil 70 that is bent is fitted into the thinnest portion. As shown in FIG. 12B, the thickness generated by bending the terminal is the same as the length of the shaft portion 91, so that a coil assembly having a low profile can be obtained.

  At this time, like the bridge portion 23 of the magnetic core portion 20 of the first embodiment, the width of the bridge portion 93 gradually increases from the shaft portion 91 toward the two side walls 91, The bridge portion 93 is configured to have a maximum width immediately before the side wall portion 91, and the width of the bridge portion 93 decreases as the distance from the shaft portion 91 increases. Thereby, the cross-sectional area of the bridge part 93, the axial part 91, and the side wall part 92 can be made the same, and the burden of a magnetic field circuit can be equalized in the whole core member. The width of the bridge portion 93 may be constant without changing. This is because the effect of reducing the height is sufficiently obtained.

  As shown in FIG. 12 (c), a part of the bridge part 93 adjacent to the side wall part 92 is stepped by an amount corresponding to the outer shape of the coil winding, and both end portions of the coil are within this step. The same effect can be obtained by weaving. At this time, the width of the step may be larger than the width of the coil winding, but the depth of the step needs to be at least equal to or greater than the thickness d of the end lead wire of the coil.

(Embodiment 6)
The sixth embodiment of the present invention is a wire manufacturing apparatus for producing the rectangular wire coils 10 and 50 of the first and third embodiments.

  Fig.13 (a) is a side view which shows the manufacturing apparatus of the wire of this Embodiment, FIG.13 (b) is the same top view. FIG. 14 is a front view of the molding receiving roller 120, and FIG. 15A is a front view of the molding push roller 110. In each figure, the pressing roller 110 for forming and the receiving roller 120 for forming are means for forming the wire 150 having a uniform cross-sectional shape, which is the material of the wire, and the wire discharging rubber rollers 130a and 130b are formed. A means for feeding the wire, and a wire winding bobbin 140 are means for winding the wire.

  Further, the molding pressing roller 110 has a substantially cylindrical shape and has an outer peripheral portion 111 corresponding to a side surface portion, and the molding receiving roller 120 has a groove portion 122 having a certain width along the circumference formed by the side surface. Is formed. As shown in FIGS. 14A and 15, the groove 122 forms a circumference, and the center 121 c of the circumference is eccentric with respect to the rotation center 120 c of the molding receiving roller 120. Therefore, as shown in the enlarged portion surrounded by a circle in FIG. 15, the depth of the groove 122 is different in each part of the molding receiving roller 120. In the example shown in the figure, the rotation center 120c of the molding receiving roller 120 is different. And a straight line connecting the circumference 121c (which is on the diameter of the molding receiving roller 120), the maximum depth dr1 and the minimum depth dr2, respectively. Note that the maximum depth dr1 is located on the side farther from the center 121c of the circumference than the minimum depth dr2.

  Further, a protrusion 122 is provided at the position of the maximum depth dr1. In the above configuration, the drawing receiving roller, the lumber discharging rubber roller, the means for holding and driving the wire winding bobbin, and the like are assumed to use known techniques, and illustration and detailed description thereof are omitted.

  Further, the outer shape of the wire 150 may be arbitrary, but the diameter needs to be larger than the diameter of the wire 160 that is formed by molding.

  In the above configuration, the molding push roller 110 corresponds to the other molding roller of the present invention, the molding receiving roller 120 corresponds to one molding roller of the present invention, and the groove portion 121 corresponds to the concave groove of the present invention. Equivalent to. Further, the protruding portion 122 corresponds to the protruding portion of the present invention.

  The operation of the wire manufacturing apparatus according to the embodiment having the above configuration will be described, and an embodiment of the wire manufacturing method of the present invention will be described. However, the operation of the protrusion 122 will be described separately, and the description thereof will be omitted in the following description.

  First, as indicated by solid line arrows in FIG. 13, the opposing pressing roller 110 for molding and the receiving roller 120 for molding rotate in synchronization with each other toward the opposing surface side. An element wire 150 is inserted between the pressing roller 110 for molding and the receiving roller 120 for molding. The rotation direction of the two rollers is the same as the insertion direction of the element wire 150 at a tangent line at the opposite point, so that the element wire 150 enters between the pressing roller 110 for molding and the receiving roller 120 for molding and pressurizes. It will be molded.

  Here, FIG. 16 (a) is an enlarged view of the wire 150 press-molded between the molding pressing roller 110 and the molding receiving roller 120, and FIG. 16 (b) is the same as FIG. Sectional views along straight lines A, B, C, and D extending from the rotation center 120s of the molding receiving roller 120 are shown.

  The element wire 150 inserted between the rollers fits into the groove 121 of the molding receiving roller 120 and is then sent between the molding pressing roller 110 and the molding receiving roller 120. Each time they are sent out in order, the distance between the molding pressing roller 110 and the molding receiving roller 120 is shortened, and the strand 150 is pressed by both rollers and starts to deform. At the point 120 in the figure, the contact point 120r between the molding pressing roller 110 and the molding receiving roller 120 is molded into the same shape as the space formed by the groove portion 121 and the outer peripheral portion 111. It is released from between both rollers and drawn out as a wire 160 to the outside.

  By the way, since the circumferential center 121c formed by the groove 121 is eccentric with respect to the rotation center 120c of the molding receiving roller 120, the depth of the groove 121 differs in each part of the molding receiving roller 120. For example, FIG. The depth dr ′ of the groove 122 at the point 120 r ′ shown in a) is shallower than the depth dr at the point 120 r where the wire 150 is currently pressed.

  Therefore, each time the molding receiving roller 120 of the molding push roller 110 rotates, the depth of the groove 120 gradually changes. Since the width of the groove 120 is constant, the thickness of the wire 160 obtained by pressure molding gradually changes.

  Here, FIG. 16 (c) shows the processing state of the strand 150 when the point 120r ′ comes to the current position 120r in FIG. 16 (a). It is shown as a sectional view in each of d. As shown in the drawing, the thickness of the wire 160 corresponds to the depth dr ′ at the point 120r ′ of the groove 122, and thus the thickness is reduced compared to the wire 160 shown in FIG. Yes. Moreover, the thickness of the wire 160 processed between the points 120r to 120r ′ is continuously reduced.

  Since the maximum depth dr1 and the minimum depth dr2 of the groove 122 are symmetrical with respect to the rotation center 120c of the molding receiving roller 120, one rotation of the roller starts from the point where the minimum depth dr2 is given. As schematically shown in FIG. 17A, the side surface shape 200 of the wire 160 obtained around is the thinnest at both ends molded at the minimum depth dr2, and the central portion formed at the maximum depth dr1 is It will be the thickest.

  Therefore, when the manufacturing apparatus 100 is continuously operated, as shown in FIG. 17B, in the wire 160, the side surface shape 200 is formed at both ends formed at the minimum depth dr2 or at the maximum depth dr1. The molded ends are connected to each other and appear continuously.

  The wire 160 obtained in this way is sent to the wire winding bobbin 140 by the wire discharge rubber rollers 130a and 130b that rotate in the same manner as the molding push roller 110 and the molding receiving roller 120, and is shown in FIG. 13 (b). As shown, the wire is wound around a wire winding bobbin 140.

  Next, the operation for inserting the strand 150 will be described. Since the outer shape of the strand 150 is larger than that of the wire 160, it is therefore larger than the space formed by the groove 121 and the side portion 111. At this time, the surplus volume of the wire 150 that has been caught in the groove 121 overflows the side surface of the molding receiving roller 120, and the wire 160 cannot obtain an accurate cross-sectional shape.

  In the present embodiment, in order to eliminate this, as shown in FIG. 16A, while the strand 150 is sandwiched between the molding push roller 110 and the molding receiving roller 120, the strand 150 Is kept so as to be always slower than the rotational speed of both rollers, and is changed in accordance with the movement of the groove 121. Thereby, when the strand 150 is pushed into both rollers, a stress is generated in a direction opposite to the insertion direction (indicated by a dotted line in the figure), and an excess volume generated when the strand 150 is fitted in the groove 121 by this stress. Is absorbed in the line direction of the element wire 150. Thereby, the wire 160 can always obtain an accurate cross-sectional shape.

  At this time, the wire insertion speed is such that when the center 121c of the circumference of the groove 121 in the receiving roller 120 for molding becomes far from the pressing roller 110 for molding, that is, the groove 121 gives the maximum depth dr1 during wire molding. Try to be the fastest. Thereby, the precision of the thickest part of the wire 160 can be improved. Further, when the center 121c of the circumference of the groove 121 in the molding receiving roller 120 is closest to the pressing roller 110 for molding, that is, when the groove 121 comes to a point where the minimum depth dr2 is provided at the time of molding the wire, it is slowest. To. Thereby, the precision of the thinnest part of the wire 160 can be improved. At this time, in order to facilitate absorption of the excess volume, a predetermined tensile stress may be applied to the supplied wire. At this time, the tensile stress may be applied at any time during the formation of the wire, but may be applied only when forming the thickest part and the thinnest part of the wire, and the magnitude of the force is It is desirable to add such that it is the smallest when forming the thickest part and the largest when forming the thinnest part of the wire. However, for the details of the operation and mechanism for applying the tensile stress, a known technique is used, and illustration and detailed description are omitted.

  Next, the operation of the protrusion 122 will be described with reference to FIG.

  18A and 18C are views for explaining the protrusion 122. FIG. As already described, the protrusion 122 is provided on the molding receiving roller 120 so as to protrude from the bottom surface of the groove 121 at a position where the groove 121 gives the maximum depth dr1. FIG. 18C is a front view showing the vicinity of the protrusion 122 of the molding receiving roller 120.

  When the wire 150 is pressure-molded by the molding push roller 110 and the molding receiving roller 120, if the position is a position that gives the maximum depth of the groove 121, the protrusion 122 is recessed into the wire 150. The tip shape is inverted and engraved on the wire 150. Here, FIG. 18B shows a notch 161 generated by the protrusion 122.

  Next, the partial shape of the wire 160 provided with the notch 161 is shown in FIG. 19A is a side view, and FIG. 19B is a top view. The notch 161 is provided at the center of the wire diagram, that is, at the thickest location.

  Therefore, when the manufacturing apparatus 100 is continuously operated, as shown in FIG. 20A, in the wire 160, both ends molded at the minimum depth dr2 or both ends molded at the maximum depth dr1 are connected to each other. Thus, the side surface shape appears continuously, and the notched portion 161 is engraved in the thickest portion that periodically appears.

  A line segment 201 can be obtained by cutting the wire 160 for each notch 161. The outer shape of the line segment 202 is the same as that of the winding 12 used to create the flat wire coil 10 of the first embodiment shown in FIG. Windings necessary for obtaining the coil can be easily obtained.

  In the above description, the protrusion 122 provided at the position where the groove 121 gives the maximum depth dr1 has been described as an example, but the protrusion may also be provided at the position where the minimum depth dr2 is provided.

  Here, FIG. 20B is a diagram of the molding receiving roller 120 including the protrusion 122 and the protrusion 123 provided at a position that gives the minimum depth dr2. In the same manner as the protruding portion 122, the protruding portion 123 cuts a notched portion at a place where the thickness of the wire 160 is the smallest.

  When the wire 150 is processed using such a receiving roller 120 for molding, as shown in FIG. 20 (c), the wire 160 has a protruding portion 122 at a portion where the thickness appears periodically. The notched notched part 161 is provided at the smallest thickness part, and the notched part 162 engraved by the projection 123 is provided.

  A line segment 202 is obtained by cutting the wire 160 for each of the notched portions 161 and 162. The outer shape of the line segment 201 is the same as that of the winding 51 used to create the flat wire coil 50 of the third embodiment shown in FIG. Thus, the winding necessary for obtaining the three rectangular coils can be easily obtained.

  By the way, the coils used in the coil assemblies of Embodiments 1 to 3 all have the same cross-sectional area at both ends. In order to realize such a shape with the wire rod according to the present embodiment, after forming the coil, it is necessary to perform processing such as crimping so that the shapes at both ends are the same in cross section.

  In order to save the labor of the end processing, the shape of the molding receiving roller 120 may be configured as shown in FIG. As shown in the drawing, in the molding receiving roller 120, a convex portion 126 a is formed on a part of the groove 121. The formation position of the protrusion 126 includes a line connecting the center 121c of the circumference of the bottom surface portion of the groove 121 and the rotation center 120c of the one molding roller, which is indicated by a broken line in the drawing. Further, the convex portion 126a is provided at a position from the rotation center 120c of the molding receiving roller 120.

  The convex portion 126a has an arc shape, and its curvature is equal to the curvature of the molding receiving roller 120. Therefore, the distance dep1 from the receiving roller 120 for molding to the convex portion 126a is a constant value. This means that the depth of the groove portion 121 corresponding to the convex portion 126a becomes the same depth when viewed from the contact point between the molding receiving roller 120 and the molding pressing roller 110.

  When the wire rod as described above is formed using such a forming receiving roller 120, the portion corresponding to the convex portion 126a has a predetermined length corresponding to the distance dep1, as shown in FIG. The flat portion 260 is provided. The predetermined length of the flat portion 260 is substantially equal to the arc length of the convex portion 126a. If the wire is cut at the center of the flat portion 260, it is possible to obtain a wire having the same cross-sectional shape at both ends, that is, the cross-sectional area when one coil is formed.

  Further, in the groove 121, the concave portion 126b may be provided on the side of the convex portion 126a that is symmetric with respect to the circumferential center 121c. That is, the concave portion 126b includes a line connecting the circumferential center 121c of the bottom surface portion of the groove 121 and the rotation center 120c of the one molding roller, and is located at a position from the circumferential center 121c of the bottom surface portion of the groove portion 121. Make it. The recess 126b has an arcuate shape, and its curvature is equal to the curvature of the receiving roller 120 for molding. Therefore, the distance dep2 from the receiving roller 120 for molding to the recess 126b is a constant value. This means that the depth of the groove 121 corresponding to the recess 126b is the same as viewed from the contact point between the molding receiving roller 120 and the molding pressing roller 110.

  When the above-described wire rod is formed using such a receiving roller 120 for molding, as shown in FIG. 26C, the portion corresponding to the recess 126b has a flat portion 260 whose thickness corresponds to the distance dep1. In addition, a flat portion 261 having a predetermined length corresponding to the distance dep2 is provided. The predetermined length of the flat portion 261 is substantially equal to the length of the arc of the recess 126b. If the wire is cut at the center of the flat portion 260 and the flat portion 261, a wire having the same cross-sectional shape at both ends, that is, the cross-sectional area, can be obtained when one coil is formed. This is effective for producing the coil assembly and coil wire of the third embodiment shown in FIG.

  Further, as shown in FIG. 27A, protrusions 122 and 123 may be provided on the protrusion 126a and the recess 126b, respectively. Accordingly, as shown in FIGS. 27B and 27C, the cut portions 161 and 162 can be provided in the flat portions 260 and 261, respectively, and the processing of the wire becomes easy.

  In the above description, FIGS. 26 and 27 show a configuration in which the molding receiving roller 120 is provided with both the convex portion 126a and the concave portion 126b. However, either one of the convex portion 126a and the concave portion 126b is provided. Needless to say, the configuration may be provided.

  In the above description, as shown in FIG. 16B and the like, the wire 160 has been described as having a rectangular cross-sectional shape, but the winding of the present invention has a cross-sectional area at one end and the other end. A plurality of unit parts that are smaller than the cross-sectional area in the above and whose cross-sectional area of each part continuously decreases in the direction from the other end to the one end seem to be continuous by connecting the one end or the other end. As long as it has a simple shape. Therefore, the cross-sectional shape may be arbitrary, and a groove portion 123 having a U-shaped cross section is formed in the molding receiving roller 120 as shown in FIG. In addition, by providing the convex portion 112 having a U-shaped cross section on the side surface portion of the pressing roller 110 for molding, a round wire having a circular cross section can be obtained with a wire whose thickness varies depending on the length. The coil and coil wire material of each said embodiment can be obtained by producing a coil similarly to. Here, FIG. 14B shows a front view of the pressing roller 110 for molding provided with the convex portion 112.

  Further, as shown in FIG. 21B, a groove 124 having a trapezoidal cross section (the bottom surface is not parallel to the side surface 111 of the molding pressing roller 110) is formed on the molding receiving roller 120. In addition, the wire whose thickness changes in accordance with the length of the square wire with the non-parallel thickness of the edge portion is obtained, and the coil and the coil wire material of each of the above embodiments can be obtained using this. .

Further, as shown in FIG. 21 (c), the molding receiving roller 120 has a trapezoidal cross section (the bottom surface is parallel to the side surface portion 111 of the molding pressing roller 110, and both side surfaces are radially inclined. By forming the groove portion 125 of the mold, it is possible to obtain a wire whose thickness varies according to the length at the square lines having different widths on one surface and the other surface. The coil and coil wire of each of the above embodiments can be obtained by using the above embodiment, and the above embodiment has been described on the assumption that the width of the groove 121 is constant. You may make it change continuously along the circumference | surroundings of the pressing roller 110 and the receiving roller 120 for shaping | molding. As shown in FIG. 28A, the width of the groove 121 is changed so that the groove 121 has a maximum width wd1 where the maximum depth dr1 is applied and a minimum width wd1 where the minimum depth dr2 is applied. For example, the change in the cross-sectional area of the wire can be given in the width direction in addition to the thickness direction. FIG. 28B shows the configuration of the molding push roller 110 when the width is changed in the configuration for creating the circular cross section shown in FIGS. 14B and 21A. FIG. It goes without saying that the width of the groove 123 of the molding receiving roller 120 (see FIG. 21A) is also changed in accordance with the change in the width. In this configuration, it is possible to obtain a wire having a substantially circular shape in cross section that increases according to the length of the wire while maintaining a similar shape.

  Further, in the above embodiment, the description has been made assuming that the molding pressing roller 110 and the molding receiving roller 120 rotate synchronously with each other. However, when manufacturing a wire having a different thickness and a constant width, The roller does not necessarily have to rotate synchronously. Further, when manufacturing a wire having a substantially circular cross section whose cross-sectional area increases while maintaining a similar shape, or a wire having a different width and a constant or different thickness, each roller needs to rotate synchronously.

(Embodiment 7)
The seventh embodiment of the present invention is another configuration example of a wire manufacturing apparatus for creating the rectangular wire coils 10 and 50 of the first and third embodiments.

  Fig.29 (a) is a side view which shows the manufacturing apparatus of the wire of this Embodiment, FIG.29 (b) is the same top view. In the drawing, a convex portion 281 having a constant width and a constant thickness is formed along the circumference formed by the side surface of the pressing roller 280 for molding. The convex portion 281 forms a circumference, and the center of the circumference coincides with the rotation center 280 c of the pressing roller 280 for molding.

  Further, the molding receiving roller 290 is formed with a groove portion 291 having a certain width along the circumference formed by the side surface thereof. The groove portion 291 forms a circumference, and the center of the circumference coincides with the rotation center 290c of the receiving roller 290 for molding.

  Further, the groove 291 has substantially the same lateral width as the convex portion 281. The depth is equal to the height of the convex portion 281, or at least the depth at which the difference between the height of the convex portion 281 and the depth of the groove portion 291 corresponds to the minimum thickness of the wire to be manufactured.

  Further, either or either of the molding push roller 280 and the molding receiver roller 290 can be moved so that the distance between the molding push roller 280 and the molding receiver roller 290 changes. However, since the configuration for realizing the movement of the roller is a known technique, detailed description and illustration are omitted.

  In the above configuration, the molding push roller 280 corresponds to the other molding roller of the present invention, the molding receiving roller 290 corresponds to one molding roller of the present invention, and the convex portion 281 corresponds to the convex portion of the present invention. The groove portion 291 corresponds to the concave groove of the present invention. The operation of the wire rod manufacturing apparatus of the present embodiment having the above-described configuration will be described, and an embodiment of the wire rod manufacturing method of the present invention will be described.

  First, as shown by the solid line arrow in FIG. 29A, the opposing molding pressing roller 280 and molding receiving roller 290 rotate in synchronism with each other toward the opposing surface, and the convex portion 281 is formed in the groove portion 291. It is designed to fit in. A space for inserting the strand 150 is formed between the convex portion 281 and the groove portion 291. The strand 150 is inserted into this space. The rotation direction of the two rollers is the same as the insertion direction of the element wire 150 at a tangent line at the opposite point, so that the element wire 150 is connected to the convex portion 281 of the molding pressing roller 280 and the groove portion 291 of the molding receiving roller 290. It goes into the space and is pressure-molded.

  At this time, in accordance with the synchronous rotation of the molding push roller 280 and the molding receiving roller 290, the interval between the convex portion 281 and the groove 291, that is, the rotational center 280c of the molding pressing roller 280 and the rotational center of the molding receiving roller 290 is obtained. Control is performed so as to narrow the interval with 290c.

  Then, the strand 150 inserted between the rollers fits in the groove portion 291 of the molding receiving roller 290 and is sent between the molding pressing roller 280 and the molding receiving roller 290. Since the distance between the convex portion 281 and the groove portion 219 is reduced, the wire 150 is pressed by both rollers and deformed.

  Further, each time the molding pressing roller 280 and the molding receiving roller 290 rotate, the distance between the two rollers itself decreases, so the distance between the convex portion 281 and the groove portion 219 gradually changes. . Since the widths of the convex portion 281 and the groove portion 291 are constant, the thickness of the wire 160 obtained by pressure molding gradually changes. This means that the same effect as in the operation state shown in FIG. The strands released from between the two rollers are drawn out to the outside as the wire 160.

  At this time, the maximum thickness of the wire 160 is given when the distance between the convex portion 281 and the groove 219 is maximized, and the minimum thickness of the wire 160 is the minimum distance between the convex 281 and the groove 219. It is given when it becomes.

  Therefore, the wire 160 having the pattern shown in FIG. 17B is obtained by periodically changing this distance in accordance with the rotation of the roller. For example, in order to obtain the pattern shown in FIG. 17A, the change in the distance between the convex portion 281 and the groove portion 219 should be one cycle each time both rollers make one rotation. Alternatively, the change may be made one cycle every time both rollers rotate twice. In this case, the change in the cross-sectional area of the wire becomes smoother.

  The wire 160 obtained in this way is sent out from the molding push roller 280 and the molding receiving roller 290 to the take-up bobbin 140 and taken up on the wire take-up bobbin 140 as shown in FIG. .

  Next, the operation for inserting the strand 150 will be described. Since the outer shape of the strand 150 is larger than that of the wire 160, it is therefore larger than the space formed by the convex portion 281 and the groove portion 291. At this time, the surplus volume of the wire 150 that is trapped between the convex portion 281 and the groove portion 291 overflows to the side surface portion of the molding receiving roller 290, and the wire 160 cannot obtain an accurate cross-sectional shape.

  In the present embodiment, in order to eliminate this, while the strand 150 is sandwiched between the convex portion 281 and the groove 291, the insertion speed of the strand 150 is always slower than the rotational speed of both rollers. In addition, it is changed according to a change in the distance between the rotation center 110c of the molding push roller 280 and the rotation center 290c of the molding receiving roller 290. As a result, when the element wire 150 is pushed into both rollers, a stress is generated in the direction opposite to the insertion direction (indicated by the dotted arrow in the figure), and this stress causes the element wire 150 to move between the convex portion 281 and the groove portion 291. The excess volume generated when filling is absorbed in the line direction of the strands 150. Thereby, the wire 160 can always obtain an accurate cross-sectional shape.

  At this time, the wire insertion speed is such that when the distance between the rotation center 110c of the molding push roller 280 and the rotation center 290c of the molding receiving roller 290 is the smallest, that is, the portion where the molded wire becomes the thinnest. Try to be the slowest at the point of formation. Thereby, the precision of the thinnest part of the wire 160 can be improved. Further, when the distance between the rotation center 110c of the molding push roller 280 and the rotation center 290c of the molding receiving roller 290 is the largest, that is, the point where the molded wire becomes the thickest part is the earliest. To. Thereby, the precision of the thickest part of the wire 160 can be improved. At this time, in order to facilitate absorption of the excess volume, a predetermined tensile stress may be applied to the supplied wire. At this time, the tensile stress may be applied at any time during the formation of the wire, but may be applied only when forming the thickest part and the thinnest part of the wire, and the magnitude of the force is It is desirable to add such that it is the smallest when forming the thickest part and the largest when forming the thinnest part of the wire. However, for the details of the operation and mechanism for applying the tensile stress, a known technique is used, and illustration and detailed description are omitted.

  In this embodiment, when a wire having flat portions 160 and 161 as shown in FIGS. 26B and 26C is formed, the distance between the convex portion 281 and the groove portion 291, that is, a pressing roller for molding. In the change in the interval between the rotation center 280c of 280 and the rotation center 290c of the receiving roller 290 for molding, a period for keeping the interval constant may be provided. That is, it is only necessary to provide a period in which the two rollers are not changed regardless of the rotation of the rollers in the periodic change in the distance between the convex portion 281 and the groove portion 291 corresponding to one rotation. At this time, when the interval between the rotation center 280c of the molding push roller 280 and the rotation center 290c of the molding receiving roller 290 becomes the largest, if the change in the interval is stopped for a predetermined time, the predetermined time is reached. A flat portion 160 having a corresponding length is obtained. When the interval between the rotation center 280c of the molding push roller 280 and the rotation center 290c of the molding receiving roller 290 becomes the smallest, if the change in the interval is stopped for a predetermined time, the length corresponding to the predetermined time is increased. A flat portion 161 is obtained.

  Further, in the present embodiment, when trying to obtain the notched portion 161 formed in the portion where the thickness of the wire 160 shown in FIG. 20A is maximum, as shown in FIG. In the receiving roller 290, the above-described operation may be performed as a configuration in which the protruding portion 292 is provided at an arbitrary position of the groove portion 291. At this time, the rotation center 110c of the molding push roller 280 and the rotation center of the molding receiving roller 290 are at the timing when the projection 292 faces the convex portion 281 of the molding push roller 280 and performs the marking operation on the wire 150. Control is performed so that the interval with 290c is maximized.

  In addition, when trying to obtain the notched portion 162 formed at the portion where the thickness of the wire 160 shown in FIG. 20B is the minimum, the protruding portion 292 faces the protruding portion 281 of the pressing roller 280 for molding. Then, at the timing when the marking operation is performed on the strand 150, control is performed so that the interval between the rotation center 280c of the molding push roller 280 and the rotation center 290c of the molding receiving roller 290 is minimized.

  Moreover, what is necessary is just to perform combining said operation | movement, when forming the wire provided with both the notch parts 161 and 162 and the flat parts 261 and 262. FIG.

  Further, in the above-described embodiment, the width of the convex portion 281 and the groove portion 291 has been described as being constant. However, the width of the convex portion 281 and the groove portion 219 is equal to the pressing roller 280 for molding and the receiving roller 290 for molding. You may make it change continuously along the circumference of. Similarly to the example shown in FIG. 28A, the convex portion 281 and the groove portion 291 have a maximum width where the convex portion 281 and the groove portion 291 give the maximum depth and a minimum width where the minimum depth is given. If the width of the wire is changed, a change in the cross-sectional area of the wire can be given in the width direction in addition to the thickness direction.

  As described above, according to the present embodiment, it is possible to obtain a wire necessary for the coil and coil wire of each of the above embodiments.

  Further, in the above embodiment, the description has been made assuming that the molding pressing roller 280 and the molding receiving roller 290 rotate synchronously with each other. However, when manufacturing a wire having a different thickness and a constant width, The roller does not necessarily have to rotate synchronously. Further, when manufacturing a wire having a substantially circular cross section whose cross-sectional area increases while maintaining a similar shape, or a wire having a different width and a constant or different thickness, each roller needs to rotate synchronously.

  In each of the above embodiments, the obtained wire rod 160 is not coated, but the wire rod of the present invention may be coated with an insulating coating such as vinyl, rubber, enamel, or resin. At this time, it is desirable to use electrodeposition coating as the coating because the thickness of the coating can be made uniform.

  The transformer using the coil and coil assembly in each of the above embodiments is also included in the invention related to the present invention, and a transformer with reduced power consumption can be obtained by reducing the resistance value.

  A wire rod, a wire rod manufacturing method, and a wire rod manufacturing apparatus according to the present invention include a wire rod, a coil assembly manufacturing method, and a manufacturing device used for a coil, a coil assembly, and the like that operate with high efficiency by reducing the resistance value with the same dimensions as conventional ones. It is useful in the use of coils and the like used for electric and electronic parts.

(A) Perspective view of the coil assembly according to the first embodiment of the invention related to the present invention (b) Plan view of the coil assembly according to the first embodiment of the invention related to the present invention (c) Related to the present invention Sectional view of coil assembly according to embodiment 1 of the invention (d) Sectional view of the coil assembly according to embodiment 1 of the invention related to the present invention (A) Perspective view of a rectangular wire coil according to Embodiment 1 of the invention related to the present invention (b) Plan view of a rectangular wire coil according to Embodiment 1 of the invention related to the present invention (c) Related to the present invention Sectional drawing of the rectangular wire coil by Embodiment 1 of invention (A) Plan view of winding of rectangular wire coil according to Embodiment 1 of the invention related to the present invention (b) Side view of winding of rectangular wire coil according to Embodiment 1 of the invention related to the present invention (A) Partial view of the magnetic core portion according to the first embodiment of the invention related to the present invention (b) Cross-sectional view of the magnetic core portion according to the first embodiment of the invention related to the present invention (c) of the invention related to the present invention Sectional drawing of the magnetic core part by Embodiment 1 (A) Perspective view of a coil assembly according to Embodiment 2 of the invention related to the present invention (b) Plan view of a coil assembly according to Embodiment 2 of the invention related to the present invention (c) Related to the present invention Sectional view of coil assembly according to embodiment 2 of the invention (d) Sectional view of coil assembly according to embodiment 2 of the invention related to the present invention (e) Coil according to embodiment 2 of the invention related to the present invention Sectional drawing which shows the other structural example of an assembly (A) Perspective view of a rectangular wire coil according to Embodiment 3 of the invention related to the present invention (b) Cross-sectional view of a rectangular wire coil according to Embodiment 3 of the invention related to the present invention (c) Related to the present invention The perspective view of the coil assembly by Embodiment 3 of invention (A) Plan view of winding of rectangular wire coil according to embodiment 3 of the present invention (b) Side view of winding of rectangular wire coil according to embodiment 3 of the present invention (A) Plan view of a coil assembly according to Embodiment 4 of the invention related to the present invention (b) Cross-sectional view of a coil assembly according to Embodiment 4 of the invention related to the present invention (c) Related to the present invention Sectional drawing of the coil assembly by Embodiment 4 of invention (A) Top view of taper washer according to embodiment 4 of the invention related to the present invention (b) Front view of taper washer according to embodiment 4 of the invention related to the present invention (c) of the invention related to the present invention Side view of taper washer according to embodiment 4. (A) Plan view of a paper spacer according to a fourth embodiment of the invention related to the present invention (b) Front view of a paper spacer according to a fourth embodiment of the invention related to the present invention (c) Relevant to the present invention A side view of a paper spacer according to a fourth embodiment of the invention (A) Perspective view of the core member according to the fifth embodiment of the invention related to the present invention (b) Front view of the core member according to the fifth embodiment of the invention related to the present invention (A) Perspective view of the core member according to the fifth embodiment of the invention related to the present invention (b) Front view of the core member according to the fifth embodiment of the invention related to the present invention (c) Of the invention related to the present invention The front view of the other structural example of the core member by Embodiment 5 (A) Side view of wire manufacturing apparatus according to Embodiment 6 of the present invention (b) Top view of wire manufacturing apparatus according to Embodiment 6 of the present invention (A) Front view of molding push roller 280 (b) Front view of another configuration example of molding push roller 280 Front view of receiving roller 290 for molding (A) The figure for demonstrating the pressure molding of the strand in the manufacturing apparatus of the wire by Embodiment 6 of this invention (b) The press molding of the strand in the manufacturing apparatus of the wire according to Embodiment 6 of this invention The figure for demonstrating (c) The figure for demonstrating the pressure molding of the strand in the manufacturing apparatus of the wire by Embodiment 6 of this invention (A) The figure which shows the side shape of the wire shape | molded by the wire manufacturing apparatus by Embodiment 6 of this invention (b) The figure which shows the wire shape | molded by the wire manufacturing apparatus by Embodiment 6 of this invention (A) The figure for demonstrating operation | movement of the protrusion part 122 in the manufacturing apparatus of the wire material by Embodiment 6 of this invention (c) Engraved by the protrusion part 122 in the manufacturing apparatus of the wire material by Embodiment 6 of this invention The figure which shows the state of a strand (c) The figure which shows arrangement | positioning of the projection part 122 in the receiving roller 290 for shaping | molding (A) Partial plan view of the wire engraved by the protrusion 122 in the wire manufacturing apparatus according to Embodiment 6 of the present invention (b) Engraved by the protrusion 122 in the wire manufacturing apparatus according to Embodiment 6 of the present invention Partial side view of broken wire (A) Side view of the wire 160 on which the cut portions 161 are formed (b) Side view of the wire 160 on which the cut portions 161 and 162 are formed (c) Front view of another configuration example of the receiving roller 290 for molding (A) Front view of another configuration example of molding pressing roller 280 and molding receiving roller 290 (b) Front view of another configuration example of molding pressing roller 280 and molding receiving roller 290 (c) Molding pressing Front view of another configuration example of roller 280 and molding receiving roller 290 (A) Perspective view of coil assembly according to conventional technology (b) Front view of coil assembly according to conventional technology (c) Front view showing a mounting state of the coil assembly according to conventional technology Sectional drawing which shows the other structural example of the coil of the coil assembly by Embodiment 1 of the invention relevant to this invention Sectional drawing which shows the other structural example of the coil of the coil assembly by Embodiment 2 of the invention relevant to this invention Sectional drawing which shows the other structural example of the coil of the coil assembly by Embodiment 3 of the invention relevant to this invention (A) The figure which shows the other structural example of the receiving roller for shaping | molding in the manufacturing apparatus of the wire material by Embodiment 6 of this invention (b) Of the receiving roller 290 for shaping | molding of the manufacturing device of the wire material by Embodiment 6 of this invention (C) Partial plan view of a wire rod produced by another configuration example of the receiving roller 290 for molding of the wire rod manufacturing apparatus according to Embodiment 6 of the present invention. (A) The figure which shows the further another structural example of the receiving roller for shaping | molding in the manufacturing apparatus of the wire material by Embodiment 6 of this invention (b) The receiving roller 290 for shaping | molding of the manufacturing device of the wire material by Embodiment 6 of this invention. (C) Partial plan view of wire prepared by yet another configuration example of molding receiving roller 290 of wire manufacturing apparatus according to Embodiment 6 of the present invention Figure (A) The figure which shows the further another structural example of the receiving roller for shaping | molding in the manufacturing apparatus of the wire by Embodiment 6 of this invention (b) Of the pressing roller for shaping | molding in the manufacturing apparatus of the wire by Embodiment 6 of this invention The figure which shows the further another structural example (A) Side view of wire manufacturing apparatus according to embodiment 7 of the present invention (b) Top view of wire manufacturing apparatus according to embodiment 7 of the present invention The figure which shows the other structural example of the receiving roller for shaping | molding in the manufacturing apparatus of the wire material by Embodiment 7 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Flat wire coil 10a, 10b Spiral part 11a, 11b End part 12 Winding 20 Magnetic core part 21 Center part 22 Outer edge part 23 Bridge part 100 Winding manufacturing apparatus 110 Molding push roller 111 Side part 120 Molding receiving roller 121 Groove part 122, 123 Projection part 130 Wire rod discharge rubber roller 140 Wire rod winding bobbin

Claims (28)

A wire unit in which predetermined unit portions are continuously formed,
The unit part is
The cross-sectional area at one end is smaller than the cross-sectional area at the other end, and the cross-sectional area at each portion is continuously reduced by decreasing the height or width of the cross-section at each portion from the other end toward the one end. There,
Each unit part is a wire which is continuous by connecting the one end and the other end directly or indirectly.   2. The wire according to claim 1, wherein the one end and / or the other end are indirectly connected through a predetermined length portion having a constant cross-sectional area.   The wire according to claim 1, wherein the cross-sectional shape is rectangular.   The wire rod according to claim 1, wherein the cross-sectional shape is substantially circular or substantially elliptical.   The wire according to any one of claims 1 to 4, wherein the surface is coated with an insulating film.   The wire according to claim 5, wherein the insulating film is formed by electrodeposition coating. A strand having a predetermined wire diameter is inserted between a pair of molding rollers rotating at a predetermined speed, and the cross-sectional shape of the strand is pressure-molded into the cross-sectional shape of the wire between the pair of molding rollers. The method for producing a wire according to claim 1, wherein
A concave groove corresponding to a part of the cross-sectional shape of the wire is formed on the contact surface of the one molding roller with the element wire in the pair of molding rollers,
The contact surface of the other molding roller with the element wire forms the remaining part of the cross-sectional shape, and the center of the circumference of the bottom surface portion of the concave groove in the one molding roller is the one molding A method of manufacturing a wire that is eccentric with respect to the rotation center of a roller.   The speed of inserting the wire is kept slower than the tangential speed of the pair of molding rollers, and the center of the circumference of the bottom surface portion of the concave groove in the one molding roller is closest to the other molding roller. 8. The method of manufacturing a wire rod according to claim 7, wherein the wire material is continuously changed so as to be the slowest sometimes and the fastest when it is the farthest to the other molding roller.   At least when the center of the circumference of the bottom surface portion of the concave groove in the one molding roller is closest to the other molding roller and the farthest from the other molding roller, The method for manufacturing a wire according to claim 8, wherein a predetermined stress is applied in a direction opposite to the insertion direction. The concave groove of the one molding roller has a predetermined length portion having the same depth as viewed from the contact point between the one molding roller and the other molding roller,
The predetermined length portion is provided at a location including a line connecting the center of the circumference of the bottom surface portion of the concave groove and the rotation center of the one molding roller,
The method of manufacturing a wire according to claim 7, wherein the place is a position from a rotation center of the one molding roller and / or a position from a circumference center of a bottom surface portion of the concave groove. The one molding roller has a protrusion at a predetermined position of the concave groove shape,
The predetermined position is on a line connecting the center of the circumference of the bottom surface portion of the concave groove and the rotational center of the one molding roller, and the position from the rotational center of the one molding roller and / or the concave groove. The position from the center of the circumference of the bottom part of
The method of manufacturing a wire according to claim 7 or 10, wherein the protrusion is stamped with a concave portion on a wire press-molded on the wire. A strand having a predetermined wire diameter is inserted between a pair of molding rollers rotating at a predetermined speed, and the cross-sectional shape of the strand is pressure-molded into the cross-sectional shape of the wire between the pair of molding rollers. The method for producing a wire according to claim 1, wherein
A concave groove corresponding to a part of the cross-sectional shape of the wire is formed on the contact surface of the one molding roller with the element wire in the pair of molding rollers,
The other molding roller in the pair of molding rollers has a width substantially the same as the width of the concave groove, and a convex portion corresponding to the remaining part of the cross-sectional shape of the wire is formed,
A method of manufacturing a wire material, wherein a distance between a rotation center of the one molding roller and a rotation center of the other molding roller is changed by a predetermined size at a period corresponding to a synchronized rotation of the pair of molding rollers. .   The change is that the rotation center of the one molding roller and the rotation center of the other molding roller are closest to each other, and / or the rotation center of the one molding roller and the rotation center of the other molding roller are The method of manufacturing a wire rod according to claim 12, wherein the wire is stopped for a predetermined time including when it is farthest, and the remaining time is continuously executed.   The wire insertion speed is kept slower than the tangential speed of the pair of molding rollers, and the slowest when the rotation center of the one molding roller and the rotation center of the other molding roller are closest to each other. The method of manufacturing a wire according to claim 12 or 13, wherein the rotation center is changed so as to be the fastest when the rotation center of the one molding roller and the rotation center of the other molding roller are furthest away.   At least when the rotation center of the one molding roller is closest to the rotation center of the other molding roller, and the rotation center of the one molding roller is farthest from the rotation center of the other molding roller. The method of manufacturing a wire according to claim 14, wherein a predetermined stress is applied to the element wire in a direction opposite to the insertion direction. The one molding roller has a protrusion at a predetermined position of the concave groove shape,
The predetermined position is on a line connecting the rotation center of the one molding roller and the rotation center of the other molding roller, and the rotation center of the one molding roller and the rotation center of the other molding roller are When the closest approach and / or when the rotation center of the one molding roller and the rotation center of the other molding roller are most distant from each other, the position facing the other roller,
The said protrusion part is a manufacturing method of the wire of Claim 12 or 13 which engraves a recessed part in the strand pressure-molded by the wire.   The pair of forming rollers are synchronously rotated, and the width of the concave groove and / or the convex portion is continuously changed along the circumference of the one forming roller and / or the other forming roller. A method for producing a wire according to 7 or 12. A strand having a predetermined wire diameter is inserted between a pair of molding rollers rotating at a predetermined speed, and the cross-sectional shape of the strand is pressure-molded into the cross-sectional shape of the wire between the pair of molding rollers. An apparatus for manufacturing a wire according to claim 1,
A concave groove corresponding to a part of the cross-sectional shape of the wire is formed on the contact surface of the one molding roller with the element wire in the pair of molding rollers,
The contact surface of the other molding roller with the element wire forms the remaining part of the cross-sectional shape, and the center of the circumference of the bottom surface portion of the concave groove in the one molding roller is the one molding An apparatus for manufacturing a wire that is eccentric with respect to the rotation center of a roller.   The speed of inserting the wire is kept slower than the tangential speed of the pair of molding rollers, and the center of the circumference of the bottom surface portion of the concave groove in the one molding roller is closest to the other molding roller. 19. The apparatus for manufacturing a wire according to claim 18, wherein the wire rod is continuously changed so as to be the latest at the latest and the earliest when it is the farthest from the other forming roller.   At least when the center of the circumference of the bottom surface portion of the concave groove in the one molding roller is closest to the other molding roller and the farthest from the other molding roller, The wire manufacturing apparatus according to claim 19, wherein a predetermined stress is applied in a direction opposite to the insertion direction. The concave groove of the one molding roller has a predetermined length portion having the same depth as viewed from the contact point between the one molding roller and the other molding roller,
The predetermined length portion is provided at a location including a line connecting the center of the circumference of the bottom surface portion of the concave groove and the rotation center of the one molding roller,
The wire manufacturing apparatus according to claim 18, wherein the place is a position from a rotation center of the one molding roller and / or a position from a circumference center of a bottom surface portion of the concave groove. The one molding roller has a protrusion at a predetermined position of the concave groove shape,
The predetermined position is on a line connecting the center of the circumference of the bottom surface portion of the concave groove and the rotational center of the one molding roller, and the position from the rotational center of the one molding roller and / or the concave groove. The position from the center of the circumference of the bottom part of
The said protrusion part is a manufacturing apparatus of the wire rod of Claim 18 or 21 which engraves a recessed part in the strand pressure-molded by the wire rod. A strand having a predetermined wire diameter is inserted between a pair of molding rollers rotating at a predetermined speed, and the cross-sectional shape of the strand is pressure-molded into the cross-sectional shape of the wire between the pair of molding rollers. An apparatus for manufacturing a wire according to claim 1,
A concave groove corresponding to a part of the cross-sectional shape of the wire is formed on the contact surface of the one molding roller with the element wire in the pair of molding rollers,
The other molding roller in the pair of molding rollers has a width substantially the same as the width of the concave groove, and a convex portion corresponding to the remaining part of the cross-sectional shape of the wire is formed,
An apparatus for manufacturing a wire material, wherein a distance between a rotation center of the one molding roller and a rotation center of the other molding roller is changed by a predetermined size at a period corresponding to a synchronized rotation of the pair of molding rollers. .   The change is that the rotation center of the one molding roller and the rotation center of the other molding roller are closest to each other, and / or the rotation center of the one molding roller and the rotation center of the other molding roller are 24. The apparatus for manufacturing a wire rod according to claim 23, wherein the apparatus is stopped for a predetermined time including when it is farthest, and the remaining time is continuously executed.   The wire insertion speed is kept slower than the tangential speed of the pair of molding rollers, and the slowest when the rotation center of the one molding roller and the rotation center of the other molding roller are closest to each other. 25. The apparatus for manufacturing a wire according to claim 23, wherein the wire rod is changed so as to be fastest when the rotation center of the one molding roller and the rotation center of the other molding roller are furthest away.   At least when the rotation center of the one molding roller is closest to the rotation center of the other molding roller, and the rotation center of the one molding roller is farthest from the rotation center of the other molding roller. The wire manufacturing apparatus according to claim 25, wherein a predetermined stress is applied to the element wire in a direction opposite to the insertion direction. The one molding roller has a protrusion at a predetermined position of the concave groove shape,
The predetermined position is on a line connecting the rotation center of the one molding roller and the rotation center of the other molding roller, and the rotation center of the one molding roller and the rotation center of the other molding roller are When the closest approach and / or when the rotation center of the one molding roller and the rotation center of the other molding roller are most distant from each other, the position facing the other roller,
The said protrusion part is a manufacturing apparatus of the wire rod of Claim 23 or 24 which engraves a recessed part into the strand pressure-molded by the wire rod.   The pair of forming rollers are synchronously rotated, and the width of the concave groove and / or the convex portion is continuously changed along the circumference of the one forming roller and / or the other forming roller. The wire manufacturing apparatus according to 18 or 23.

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