JP2002064028A - Coil and device and method for forming lead - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately form a lead having a complicated shape. SOLUTION: A device 120 for forming a lead comprises first and second fixing patterns 124 and 126 for fixing the winding end 312 of a coil 110 fitted and fixed to a fixing part 122, a first bending pattern 128 for bending a part at the end of the coil 110 of a winding end 112 in cooperation with the first and second fixing patterns 124 and 126, and a second bending pattern 130 for bending a part of the winding end 112 in cooperation with the second fixing pattern 126 along a surface different from a surface including a contact line of the coil 110. A different part of the winding end 112 is bent along different two planes to form a lead. Since a plurality of patterns are used, a lead having a complicated shape can be formed accurately, and when a pattern is restored, no damage is given to its surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil, a lead forming apparatus and a lead forming method, and more particularly, to a coil formed by winding a rectangular wire, a lead forming apparatus for forming a coil lead, and a coil lead forming apparatus. And a lead forming method.

[0002]

2. Description of the Related Art Conventionally, as this type of lead forming apparatus, there has been proposed an apparatus which forms a lead by forming a winding end of a coil in a predetermined shape and winds the coil (for example, Japanese Patent Application Laid-Open No. 2000-2000). No. 23429). This device is a coil forming device proposed by the applicant. The device winds the coil by sandwiching the winding start end of the wire and bending and fixing the end of the wire parallel to the winding axis of the coil. Thus, the winding start end fixed in the bent state has a predetermined lead shape.

[0003]

However, with the recent miniaturization and high performance of the motor, a complicated lead shape is required in order to facilitate the connection of the coil used in the motor and to reduce the space. It is becoming. In addition, it is desired to secure high precision and quality in forming the leads.

An object of the lead forming apparatus and lead forming method of the present invention is to form leads of complicated shape with high accuracy. It is another object of the lead forming apparatus and the lead forming method of the present invention to prevent a decrease in quality due to formation of a lead having a complicated shape. An object of the present invention is to facilitate connection and reduce space.

[0005]

Means for Solving the Problems and Their Functions and Effects The coil, lead forming apparatus and lead forming method of the present invention employ the following means in order to at least partially achieve the above object.

A first lead forming apparatus of the present invention is a lead forming apparatus for forming a lead by forming a bend along at least two different planes at a winding end of a coil, and at least one lead for fixing the coil. A fixing means comprising a fixed type, and a first surface including a tangent of the coil at the winding end at a position corresponding to the end of the coil at a winding end of the fixed coil in cooperation with the fixing type of the fixing means. A first bending means having a first bending type that can be bent along the axis, and a winding end of the bent coil in cooperation with the fixed type of the fixing means and / or the first bending type of the first bending means. A second bendable at least partially along a second surface different from the first surface;
And a second bending means having a bending type.

In the first lead forming apparatus of the present invention,
A portion corresponding to the end of the coil at the winding end of the coil fixed by the first bending means using the fixed type of the fixing means and the first bending type is formed along the first surface including the tangent of the coil at the winding end. A part of the winding end of the coil bent by the second bending means using the fixed type of the fixing means or the first bending type and the second bending type of the first bending means. Bending along different second surfaces. As a result, leads having bends along two different planes can be formed. In addition, since it is formed using a mold, it is possible to increase the accuracy of the formation and maintain the quality high.

In the first lead forming apparatus of the present invention, the first bending type of the first bending means is a type capable of bending a portion corresponding to the end of the coil at the winding end by approximately 90 degrees. It can also be.

Further, in the first lead forming apparatus of the present invention, the first bending type of the first bending means has at least one position closer to the end than the part corresponding to the end of the coil at the winding end. It is also possible to use a mold capable of forming a bend along the first surface. In this case, the leads can be formed in a more complicated shape.

Further, in the first lead forming apparatus of the present invention, the second bending type of the second bending means is a type in which a surface substantially orthogonal to the first surface is the second surface. It can also be.

A first lead forming method according to the present invention is a lead forming method for forming a lead by forming a bend along at least two different planes at a winding end of a coil, the lead forming method comprising: A first bending step of bending a portion corresponding to an end of the coil along a first surface including a tangent of the coil at the winding end, and forming at least a part of the winding end of the bent coil into the first winding. And a second bending step of bending along a second surface different from the second surface.

According to the first lead forming method of the present invention, leads having bends along two different planes can be formed.

[0013] In the first lead forming method of the present invention, the first bending step may be a step of bending a portion corresponding to the end of the coil at the winding end by approximately 90 degrees.

Further, in the first lead forming method of the present invention, the first bending step includes the step of forming the first surface on at least one end of the winding end closer to an end of the coil than the end of the coil. May be a step of forming a bend along. In this case, a lead having a more complicated shape can be formed.

Further, in the first lead forming method of the present invention, the second bending step may be a step of bending a surface substantially perpendicular to the first surface as the second surface. it can.

A second lead forming apparatus of the present invention is a lead forming apparatus for forming a lead by forming a predetermined concave portion by embossing using a concave shape and a convex shape at a winding end of a coil,
The gist is characterized in that a preliminary forming means for forming a small recess smaller than the predetermined recess is provided at a position where the predetermined recess is formed at the winding end of the coil in cooperation with the recess. .

In the second lead forming apparatus of the present invention,
When embossing with a convex mold and a concave mold, first, by a preliminary forming means provided in the convex mold, a small concave part smaller than the predetermined concave part is preliminarily formed at a position where a predetermined concave part at the winding end of the coil is formed, After that, a predetermined concave portion is formed in the site. By forming a small concave portion in advance and then forming a predetermined concave portion, it is possible to prevent the covering of the wire surface from being damaged when the predetermined concave portion is formed.

[0018] In the second lead forming apparatus of the present invention, the preliminary forming means may include a housing protrusion that can be housed in the protrusion and that can form a part of a tip of the protrusion; There may be provided an urging means which is arranged in the housing portion of the housing convex portion and urges the housing convex portion outward with a predetermined urging force.

A second lead forming method according to the present invention is a lead forming method for forming a lead by forming a predetermined concave portion at a winding end of a coil. The second lead forming method is capable of forming a small concave portion smaller than the predetermined concave portion. A step of forming the small concave portion at a position where the predetermined concave portion is formed at the winding end of the coil using the first concave shape and the first convex shape; and a second process capable of forming the predetermined concave portion. And a concave forming step of forming the predetermined concave portion in a portion where the small concave portion is formed by using the concave mold and the second convex mold.

According to the second lead forming method of the present invention, a small concave portion is formed in a portion where a predetermined concave portion is formed, and then a predetermined concave portion is formed in a portion where the small concave portion is formed. When the predetermined concave portion is formed, it is possible to prevent the covering of the wire surface from being damaged.

In the second lead forming method of the present invention, the first concave mold is the same as the second concave mold, and the second convex mold has a first convex mold at a convex portion. And a biasing means which is disposed in a storage portion for storing the first convex portion and biases the convex portion outward with a predetermined biasing force. The small recess forming step and the recess forming step may be performed continuously using the second concave mold and the second convex mold. In this case, the formation of the small recess and the formation of the predetermined recess can be continuously performed using the same mold.

The coil according to the present invention is a coil formed by winding a rectangular wire, and has a lead having a bent torsion portion having a first angle from the winding direction of the coil and having a second angle. The point is to prepare.

In the coil of the present invention, since the leads are bent at a first angle from the winding direction of the coil and have a bent torsion having a second angle of twist, the surfaces of the flat rectangular wires can be aligned. it can. Moreover, because of the bending and torsion, the space required for aligning the surfaces can be reduced. As a result, the connection can be facilitated and the space required for the connection can be reduced.

In such a coil of the present invention, both the first angle and the second angle may be substantially 90 degrees.

Further, in the coil according to the present invention, the bent torsion part of the lead may include a bent part bent at the first angle from a winding end of the coil, and a bent part continuous with the bent part and having the second angle. And a torsion part having a torsion.

A third lead forming apparatus according to the present invention is a lead forming apparatus which forms a lead by forming a torsion and a bend at a winding end of a coil formed by winding a rectangular wire. A bent portion forming means for forming a bent portion having a first angle from a tangential direction of the coil toward the normal direction of the coil at an end, and the bent portion and / or the winding end where the bent portion is formed. Alternatively, the gist of the present invention is to provide a torsion forming means for forming a torsion at a second angle at a position closer to the coil than the bent portion.

In the lead forming apparatus of the present invention, the bent portion forming means forms a bent portion at the winding end of the coil at a first angle from the tangential direction of the coil toward the normal direction of the coil, thereby forming a torsion. Means forms a twist at a second angle at the bent portion of the winding end where the bent portion is formed or at a position closer to the coil than the bent portion. As a result, it is possible to form a lead which is bent at a first angle from the winding direction of the coil and has a torsion at a second angle, that is, a lead having a flat rectangular wire. Moreover, because of the bending and torsion, the space required for aligning the surfaces can be reduced.

In the lead forming apparatus of the present invention, the torsion forming means includes a first acting means for applying a force along a coil axis to a predetermined portion on the end side of the winding end from the bent portion; A pressing force opposing a force acting on the bent portion of the winding end and / or a portion of the winding end closer to the coil than the bent portion is applied at least with the lapse of time of the action of the force by the first action portion. A second acting means for acting so as to be reduced over two steps, and the torsion forming means is provided at a predetermined position on the end side of the winding end with respect to the coil shaft. A first acting means for applying a force along the axis, and a pressing force opposing the force applied by the first acting means is applied from the bent portion to the bent portion with the lapse of time of the action of the force by the first action portion. More to the coil side It may be made and a second working means to act to move over at least two places Te.

A third lead forming method according to the present invention is a lead forming method for forming a lead having a predetermined shape at a winding end of a coil formed by winding a rectangular wire, wherein the coil has a winding end at the winding end of the coil. A bent portion forming step of forming a bent portion having a first angle from a tangential direction of the coil toward a normal direction;
The present invention further comprises a torsion forming step of forming a torsion at a second angle at the bent portion of the winding end where the bent portion is formed and / or at a position on the coil side of the bent portion.

According to the third lead forming method of the present invention, the lead is bent at the first angle from the winding direction of the coil and has a torsion at the second angle, that is, a lead having a flat rectangular wire. Can be formed. Moreover,
Because of the bending and twisting, the space required for aligning the surfaces can be reduced.

In the third lead forming method of the present invention, the twist forming step applies a predetermined force along a coil axis to a predetermined portion on the end side of the winding end from the bent portion. The pressing force against the predetermined force on the bent portion of the winding end and / or a portion on the coil side of the bent portion is reduced over at least two stages with the lapse of time of the action of the predetermined force. It can be understood that this is a step of forming a torsion by acting, and in the torsion forming step, a predetermined force along the axis of the coil is applied to a predetermined portion on the end side from the bent portion of the winding end. Along with the action, the pressing force opposing the predetermined force is moved from the bent portion toward the coil side from the bent portion toward at least two places with the passage of time of the action of the predetermined force, and is applied. Work to form torsion It can also be assumed to be in.

[0032]

Next, embodiments of the present invention will be described with reference to examples. FIG. 1 is a configuration diagram schematically showing the configuration of a lead forming apparatus 120 according to a first embodiment of the present invention, and FIG.
It is a block diagram which shows the structure when seen from the surface. As shown, the lead forming apparatus 120 of the first embodiment
0, and a fixing portion 122 for attaching and fixing
A first fixed type 124 for fixing the lower end in FIG. 1 of the coil 110 attached and fixed to the second from the right side, and a second fixed type for fixing the lower end in FIG. 1 of the coil 110 from below in cooperation with the first fixed type 124. 126, and a portion of the winding end 112 located at the lower end of the coil 110 located at the end of the coil 110 in cooperation with the first fixed die 124 and the second fixed die 126 is bent along a plane including a tangent line of the coil 110. First bending mold 12
8 and a second bent mold 13 that bends a part of the winding end 112 bent by the first bent mold 128 along a plane different from the plane including the tangent of the coil 110 in cooperation with the second fixed mold 126.
0 and an electronic control unit 15 for driving and controlling these molds.
0.

The electronic control unit 150 has a CPU
The electronic control unit 150 includes a ROM 154 storing a processing program, a RAM 156 temporarily storing data, and an input / output port (not shown). From the port, the first fixed type 124 and the second fixed type 12
6, drive signals are output to actuators 134 to 140 that move the first bending mold 128 and the second bending mold 130 along the support shaft of each mold.

Next, the operation of the lead forming apparatus 120 of the first embodiment thus configured will be described together with the structure of each type. The formation of the lead starts with attaching the coil 110 to the fixing part 122 of the lead forming apparatus 120 of the first embodiment. FIG. 3 shows a state viewed from the same line of sight as FIG. 1 when the coil 110 is attached to the fixing portion 122, and FIG. 4 shows a state viewed from the same line of sight as FIG. In the embodiment, the wound coil 110 is attached to the fixing portion 122 of the lead forming device 120. However, the coil forming device for winding the coil 110 and the lead forming device 1
20 and the fixing portion 122 is a winding shaft used for winding the coil 110,
There is no work of attaching the coil 10 to the fixing portion 122, and it can be considered that the coil 110 has been attached to the fixing portion 122 when the winding is completed.

Subsequently, the first fixed mold 124 is used to fix the fixed portion 12.
The second fixed mold 126 is fixed so that the lower part of the coil 110 in FIG.
Thus, the coil 110 is fixed so as to be pressed from below in FIG. FIGS. 5 and 6 show the state in which the coil 110 is pressed by the first fixed mold 124 as viewed from the same line of sight as FIGS. 1 and 2, and show the state in which the coil 110 is pressed by the second fixed mold 126. FIGS. 7 and 8 show the same as seen from the same line of sight as FIGS. 1 and 2. In addition,
6 and 8 viewed from the same line of sight as FIG. 2, the first fixed mold 124 and the second fixed mold 126 overlap each other, and thus are illustrated as perspective views. Hereinafter, a diagram viewed from the same line of sight as FIG. 2 will be similarly described as a perspective view. As shown in FIGS. 1 and 7, a concave portion 124 a is formed at a lower portion of the first fixed mold 124, and a convex portion 126 a is formed at an upper portion of the second fixed mold 126. When pressing the lower end, the protrusion 126a of the second fixed mold 126 is
The recesses 24a are aligned with the recesses 24a. By matching the projection 126a with the recess 124a, a portion corresponding to the end of the coil 110 at the winding end 112 of the coil 110 is fixed.

Then, the first bending mold 128 is operated to bend the portion 112a of the winding end 112 of the coil 110 corresponding to the end of the coil 110 by about 90 degrees along the plane including the tangent of the coil 110. FIGS. 9 and 10 show this state as viewed from the same line of sight as FIGS. 1 and 2. As shown in FIGS. 2, 8, and 10, the winding end 11 of the first bending mold 128 is provided.
The coil 110 that bends the winding end 112 on the surface that holds
A double bend forming portion 128b composed of two bends along a plane including the tangent of the first fixed mold 124 and the second bend
The fixed mold 126 is formed with multiple bend receiving portions 124b and 126b that match the multiple bend forming portion 128b with the width of the element wire. Therefore, the portion 112a of the winding end 112
When bending the double bending portion 12 of the first bending mold 128,
8b and the double bend receiving portions 124b and 126b of the first fixed die 124 and the second fixed die 126 form a double bent portion 112b having two bends at the winding end 112.

Next, by operating the second bending mold 130, a portion 112c of the winding end 112 of the coil 110 closer to the end than the double bending portion 112b forms a surface forming an angle of about 90 degrees with the surface including the tangent of the coil 110. Bend along. FIG. 11 and FIG. 12 show this state viewed from the same line of sight as FIG. 1 and FIG.
Shown in As shown in FIG. 1 and FIG.
30 is formed in a wedge shape, a first fixed mold 124 is formed with a wedge support portion 124 c that supports one side of the second bent mold 130, and a second fixed mold 126 is formed with a second bent mold 13.
Bending angle θ1 of the portion 112c of the winding end 112 together with the hypotenuse of 0
Is set. Therefore, the winding end 112 and the first fixed mold 124 in FIG.
By pressing the second bending mold 130 into the gap between the second fixed mold 126 and the second fixed mold 126, the part 112 c of the winding end 112 bends. The angle θ2 of the hypotenuse of the second bending mold 130 and the angle θ of the angle setting unit 126c
2 is adjusted so that a desired angle (ie, a bending angle θ1) is obtained when the portion 112c of the winding end 112 returns by so-called springback when the mold is removed.

The formation of the winding end 112 of the coil 110 as a lead is thus completed, but the removal of each mold is performed in the reverse order of the formation of the lead. That is, first, the second bending mold 130 is returned, the first bending mold 128 is returned, and the second fixed mold 126 and the first fixed mold 124 are returned, and the coil 110 is fixed to the fixing portion 12.
Remove from 2. Lead forming apparatus 12 of first embodiment
At 0, the return operation of each mold does not act on the lead formed at the winding end 112, so that the lead shape is not deformed. FIG. 13 shows a winding end 112 of the coil 110.
1 and 2 are shown as viewed from the same line of sight as FIGS.

According to the lead forming apparatus 120 of the first embodiment described above, the portion 112a corresponding to the end of the coil 110 is bent at the winding end 112 of the coil 110 along the plane including the tangent of the coil 110. At the same time, it is possible to form a lead in which the portion 112c closer to the end than the portion 112a is bent along a plane that forms an angle of about 90 degrees with the plane including the tangent of the coil 110. Moreover, by forming the multiple bending forming portion 128b on the first bending die 128 and forming the multiple bending receiving portions 124b and 126b on the first fixed die 124 and the second fixed die 126, the position of the winding end 112 of the coil 110 is improved. 11
A double-bend portion 1 composed of two bends formed on the same bent surface as the bent surface of the portion 112a between the portion 2a and the portion 112c
12b can be formed. Furthermore, according to the lead forming apparatus 120 of the first embodiment, since the returning operation of each mold is performed so that no force acts on the lead formed at the winding end 112, the lead shape is not deformed. That is,
Damage to the lead due to the mold return operation can be prevented, and a high-quality lead can be formed.

In the lead forming apparatus 120 of the first embodiment,
Although the multiple bend forming portion 128b is formed on the first bending mold 128 and the multiple bend receiving portions 124b and 126b are formed on the first fixed mold 124 and the second fixed mold 126, the double bending forming portion 128b is formed on the first bending mold 128. And the first fixed mold 1
24 and the second fixed mold 126 have the multiple bending receiving portions 124b and 126.
b may not be formed.

In the lead forming apparatus 120 of the first embodiment,
Although the portion 112a of the winding end 112 of the coil 110 is bent at about 90 degrees, it may be bent at any angle as long as it is bent along a plane including the tangent of the coil 110. Also, in the lead forming apparatus 120 of the first embodiment, the portion 112c of the winding end 112 is bent along a plane that forms an angle of 90 degrees with the plane including the tangent of the coil 110,
As long as the coil 110 is bent along a plane different from the plane including the tangent of the coil 110, the angle formed by the plane including the tangent of the coil 110 may be any angle. Further, the bending angle of the portion 112c may be any angle.

Next, a description will be given of a lead forming apparatus 220 according to a second embodiment of the present invention. FIG. 14 is a configuration diagram schematically showing the configuration of the lead forming apparatus 220 of the second embodiment. As shown, the lead forming apparatus 220 of the second embodiment includes a convex 222 moved up and down by an actuator 238 and a concave 240 mounted on a fixed base.

The convex part 224 of the convex part 222 is formed with a housing part 226 for accommodating the small convex part 228 from the front end part toward the inside. The small convex part 228 is attached to this storing part 226 outside. A biasing coil spring 230 is mounted. When the small convex portion 228 is stored in the storage portion 226, the distal end (lower side in FIG. 14) forms a part of the convex portion 224. The convex portion 224 in the state where the small convex portion 228 is housed is formed so as to match the concave portion 242 of the concave mold 240 with the width of the coil wire, and the tip of the small convex portion 228 is larger than the outer shape of the convex portion 224. It is formed small.

Next, the operation of the lead forming apparatus 220 according to the second embodiment thus configured will be described. In forming a lead by the lead forming apparatus 220 of the second embodiment, first, the winding end 212 of the coil is disposed on the concave mold 240. This state is shown in FIG. Then, the actuator 238 is operated to move the convex 222 to the concave 240 side. At this time, the small protrusion 22 urged by the coil spring 230
8 abuts against the winding end 212 of the coil, causing the winding end 212 to deform. FIG. 16 shows this state. In the embodiment, the urging force of the coil spring 230 is adjusted to a value that can cause the winding end 212 to deform.

Further, when the convex mold 222 is moved to the concave mold 240 side, the winding end 212 is formed by the small convex part 228 with the compression deformation of the coil spring 230, that is, while accommodating the small convex part 228 in the storage part 226. Is further transformed. FIGS. 17 and 18 show how the winding end 212 is deformed.
Shown in As shown in FIG.
Of the concave portion 24 compared to the gap A between the side surface of the convex portion 224 and the side surface of the concave portion 24.
2 is larger than the side surface of the small convex portion 228, the concave portion formed at the winding end 212 as the convex portion 222 moves toward the concave portion 240 side has an outer shape of the concave portion 240 of the concave type 240.
It becomes a small recess smaller than the recess corresponding to 42. In the formation of the small concave portion, there is a sufficient gap B between the side surface of the concave portion 242 of the concave mold 240 and the side surface of the small convex portion 228.
2 has a degree of freedom when forming a small concave portion, and almost no stress other than the stress accompanying the formation of the concave portion is generated.

Then, the convex 222 is wound around the concave 240 by the winding end 2.
12 until it is brought into contact, the small projection 228
Is completely accommodated in the accommodating portion 226, and the leading end of the small convex portion 228 is integrated with the leading end of the convex portion 224 to deform the winding end 212. This state is shown in FIG. As described above, since the outer shape of the convex portion 224 is formed so as to match the concave portion 242 of the concave mold 240 with the width of the winding end 212, the outer shape of the convex portion 224 matches the concave portion 242 of the concave mold 240 ( A lead having a desired concave shape is formed.
At this time, since a small recess slightly smaller than the desired recess is formed in advance at the winding end 212 of the coil, stress other than the stress accompanying the formation of the recess at the winding end 212 when forming the desired recess is small. Becomes As a result, damage to the winding end 212 such as peeling of the insulating film near the portion corresponding to the corner of the concave die 240 of the winding end 212 caused by the formation of the concave portion is less likely to occur.

According to the lead forming apparatus 220 of the second embodiment described above, a small concave portion is formed at the winding end 212 of the coil by the small convex portion 228 and the concave die 240, and then a desired concave portion is formed by the convex portion 224 and the concave die 240. Since the lead is formed as a concave portion, when the desired concave portion is formed by direct embossing, a stress other than the stress associated with the formation of the concave portion is generated at the coil end 212 of the coil, and damage to the winding end 212 such as peeling of the insulating film. Can be prevented. In addition, by providing the small protrusion 228 that is received in the housing 226 by receiving the urging force of the coil spring 230 on the protrusion 224, the formation of the small recess and the formation of the desired recess can be performed continuously using the same mold. Can be performed.

In the lead forming apparatus 220 of the second embodiment,
By providing the small convex portion 228 received in the housing portion 226 by receiving the urging force of the coil spring 230 on the convex portion 224, the formation of the small concave portion and the formation of the desired concave portion are continuously performed using the same mold. However, a convex mold for forming a small concave portion and a convex mold for forming a desired concave portion may be provided, and a desired concave portion may be formed by pressing twice. In this case, the concave mold used for forming the small concave part and the concave mold used for forming the desired concave part may be the same or different.

Next, a lead forming apparatus 320 according to a third embodiment of the present invention and a coil 310 formed by the lead forming apparatus 320 will be described. First, the third
A coil 310 as an embodiment will be described. FIG.
FIG. 10 is a perspective view illustrating an appearance of a coil 310 according to a third embodiment. As shown, the coil 310 of the third embodiment is wound in a rectangular shape using a rectangular wire, and the inner winding end 312 has a bent portion 314 of about 90 degrees and the bent portion 314 of the bent portion 314. A lead is formed by a bent torsion part 318 including a torsion part 316 of about 90 degrees near the coil side.

Here, the bent torsion part 318 is connected to the bent part 31.
4 and the torsion portion 316, the direction of the end face of the lead without causing two bends in the same portion,
That is, it is for aligning the directions of the long side and the short side with the direction of the end face of the lead outside the coil 310 and for reducing the space required for the lead to rise. That is, in order to align the direction of the end surface of the lead formed on the winding end 312 only by bending with the direction of the end surface of the lead outside the coil 310, the bending portion 314 may be bent twice in two directions,
It is necessary to bend the bent portion 314 and two places in the vicinity thereof. However, two bends in the same direction in two directions remarkably reduce the strength of the bend portion and also cause the insulating film on the surface to be bent with the two bends. Peeling is likely to occur, which is not preferable,
This is because providing the bent portions at two places even in the vicinity increases the space required for the lead to rise. The space required for rising the lead in the coil 310 of the third embodiment is the sum of the space required for twisting the flat wire in the torsion part 316 and the space required for bending in the bending part 314, of which the torsion is required. The space required for bending is smaller than the space required for bending,
The space is smaller than that in the case where leads are formed by providing two bent portions.

According to the coil 310 of the third embodiment described above, by forming the bent torsion portion 318 including the bending portion 314 and the torsion portion 316, the direction of the end face of the lead formed at the winding end 312 can be changed. The orientation of the end faces of the leads outside the coil 310 can be aligned, the strength of the leads can be ensured, and the space required for starting the leads can be reduced.

Next, the coil 310 of the third embodiment will be described.
Forming device 320 for forming a lead at the winding end 312
Will be described. FIG. 21 is a configuration diagram schematically showing the configuration of the lead forming apparatus 320 of the third embodiment. FIG. 22 is a diagram showing the configuration of the lead forming apparatus 320 of the third embodiment when viewed from the BB plane in FIG. FIG. As shown, the lead forming apparatus 320 of the third embodiment includes a first pressing die 322 for pressing the winding end 312 of the coil 310 from above in FIG.
And the bent portion 31 of the winding end 312 in cooperation with the first pressing die 322.
4 and the torsion part 3 of the winding end 312
21, a torsion action type 328 that cooperates with the second pressing die 326 to twist the torsion portion 316 of the winding end 312, and an electronic control unit 350 that drives and controls these types. And

The electronic control unit 350 has a CPU
The electronic control unit 350 includes a ROM 354 that stores a processing program, a RAM 356 that temporarily stores data, and an input / output port (not shown). From the port, a two-way actuator 3 for moving the support shaft of the first pressing mold 322 along the two arrows in FIG.
Drive signals to the actuators 334 to 338 for moving the bending mold 324, the second pressing mold 326, and the torsion action mold 328 along the support shaft of each mold are output.

Next, the operation of the lead forming apparatus 320 according to the third embodiment thus configured will be described together with the structure of each type. To form the lead, the first pressing die 322 is connected to the winding end 312.
The coil 310 is moved so that its corners come into contact with the center thereof, and the bent mold 324 is moved to form a bent portion 314 at the winding end 312 together with the first pressing mold 322.
The pressing mold 322 and the bending mold 324 are returned. The manner in which the bent portion 314 is formed at the winding end 312 is shown in FIGS. FIG.
As shown in FIG. 2 and FIG. 24, the bending mold 324 is
It is formed in an L shape so that a bent portion 314 can be formed at the winding end 312 in cooperation with the winding end 22.

Next, the actuator 338 is driven by the second pressing die 326 such that the bent portion 314 of the winding end 312 is pressed from the right side in FIG. 21 by a predetermined force. This state is shown in FIGS. 26 and 27. And the torsion action type 328
The torsion action type 328 is operated until the tip of the coil 310 has a distance ΔL1 from the end of the coil 310. This state is shown in FIG. At this time, the force F1 acting on the bent portion 314 of the winding end 312 from the second pressing die 326 becomes larger than the force F2 acting on the second pressing die 326 from the bent portion 314 due to the deformation of the winding end 312, that is, F1> F2. The pressing force F1 of the second pressing die 326 by the actuator 336 is adjusted so that This force relationship is illustrated in FIG.

Next, the torsion action type 328 is operated until the tip of the torsion action type 328 becomes a distance ΔL2 from the end of the coil 310, and the second pressing die 32
6, the force F1 acting on the bent portion 314 of the winding end 312 is changed from the bent portion 314 to the second pressing die 32 with the deformation of the winding end 312.
6, so that F1 <F
The second pressing die 32 by the actuator 336 so as to be 2
The pressing force F1 of No. 6 is adjusted. This state is shown in FIG. 30 and the force relationship is shown in FIG. In the relationship of F1 <F2, the second pressing die 326 is moved to the right side in FIG. 30 by the force F2, so that a torsion occurs on the coil side of the bent portion 314 of the winding end 312, and a torsion portion 316 is formed.

Then, the torsion action type 328 is returned, and the first
The pressing die 322 is moved to the center side of the coil 310 and the first pressing die 322 is moved to the second pressing die 326 side so that the winding end 312 is held between the first pressing die 322 and the second pressing die 326. This state is shown in FIG. With this operation, the winding end 312 stands substantially perpendicular to the coil 310, and the formation of the lead ends.

According to the lead forming apparatus 320 of the third embodiment described above, the winding portion 312 of the coil 310 has the bent portion 3
A lead having a bent torsion portion 318 including the torsion portion 14 and the torsion portion 316 can be formed.

In the lead forming apparatus 320 of the third embodiment,
When the torsion action type 328 is operated until the distal end thereof becomes a distance ΔL2 from the end of the coil 310, the second pressing die 326 is operated.
The force F1 acting on the bent portion 314 of the winding end 312 from the bending portion 314 is changed by the deformation of the winding end 312 from the second pressing die 326.
At the winding end 312 so as to be smaller than the force F2 acting on
Twisted on the coil side from the bent portion 314 of
As shown in the modification of FIG. 33, when the torsion action type 328 is operated until the distal end thereof becomes a distance ΔL2 from the end of the coil 310, the second pressing die 326B is moved from the bent portion 314 of the winding end 312 to the coil side. End 3 by sliding
The torsion may be generated on the coil side from the 12 bent portions 314. This is because the second pressing die 326B is wound around the winding end 31.
2 by sliding from the bent portion 314 to the coil side, the winding end 312 based on the force of the torsion action type 328.
Is based on the sliding of the point of application of the stress. In this case, the force F1 acting on the bent portion 314 of the winding end 312 from the second pressing mold 326B is changed by the deformation of the winding end 312.
It is only necessary to hold the state from 4 to a state larger than the force F2 acting on the second pressing mold 326B.

In the lead forming apparatus 320 of the third embodiment,
Although the bent portion 314 is bent at approximately 90 degrees, this angle may be any angle. In addition, the torsion part 3
The torsion angle of 16 may be any number.

The embodiments of the present invention have been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various embodiments may be made without departing from the gist of the present invention. Of course, it can be carried out.

[Brief description of the drawings]

FIG. 1 is a configuration diagram schematically showing the configuration of a lead forming apparatus 120 as a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a configuration when the lead forming apparatus 120 of the first embodiment of FIG. 1 is viewed from the AA plane.

FIG. 3 is an explanatory diagram showing a state where the coil 110 is attached to a fixing portion 122 and viewed from the same line of sight as FIG.

FIG. 4 is an explanatory diagram showing a state when the coil 110 is attached to a fixing portion 122, viewed from the same line of sight as FIG.

FIG. 5 is an explanatory diagram showing a state viewed from the same line of sight as FIG. 1 when the first fixed mold 124 is operated.

FIG. 6 is an explanatory diagram showing a state viewed from the same line of sight as FIG. 2 when the first fixed mold 124 is operated.

FIG. 7 is an explanatory view showing a state viewed from the same line of sight as FIG. 1 when the second fixed mold 126 is operated.

FIG. 8 is an explanatory view showing a state viewed from the same line of sight as FIG. 2 when the second fixed mold 126 is operated.

FIG. 9 is an explanatory diagram showing a state viewed from the same line of sight as FIG. 1 when the first bending mold 128 is operated.

FIG. 10 is an explanatory diagram showing a state viewed from the same line of sight as FIG. 2 when the first bending mold 128 is operated.

FIG. 11 is an explanatory diagram showing a state viewed from the same line of sight as FIG. 1 when the second bending mold 130 is operated.

FIG. 12 is an explanatory diagram showing a state viewed from the same line of sight as FIG. 2 when the second bending mold 130 is operated.

FIG. 13 is an explanatory diagram showing a state in which a lead shape is formed at a winding end 112 of a coil 110 as viewed from the same line of sight as FIGS. 1 and 2;

FIG. 14 is a configuration diagram schematically illustrating a configuration of a lead forming apparatus 220 according to a second embodiment.

FIG. 15 is an explanatory diagram illustrating a state where the winding end 212 of the coil is arranged in the concave mold 240.

FIG. 16 is an explanatory view exemplifying a state of deformation of a winding end 212;

FIG. 17 is an explanatory view illustrating a state in which a small concave portion is formed at the winding end 212;

FIG. 18 is an explanatory view exemplifying a state in which a small concave portion is formed at the winding end 212;

FIG. 19 is an explanatory view exemplifying a state where a desired concave portion is formed in the winding end 212;

FIG. 20 is a perspective view illustrating the appearance of a coil 310 according to a third embodiment.

FIG. 21 is a configuration diagram schematically illustrating a configuration of a lead forming apparatus 320 according to a third embodiment.

FIG. 22 is a lead forming apparatus 32 of the third embodiment shown in FIG. 21;
FIG. 2 is a configuration diagram showing a configuration when 0 is viewed from a BB plane.

FIG. 23 is an explanatory view exemplifying a state in which a bent portion 314 is formed at a winding end 312.

FIG. 24 is an explanatory view exemplifying a state in which a bent portion 314 is formed at a winding end 312.

FIG. 25 is an explanatory view exemplifying a state in which a bent portion 314 is formed at a winding end 312.

FIG. 26 shows a bent portion 314 of a winding end 312 being fixed to a second pressing die 32.
It is explanatory drawing which illustrates the state pressed by 6.

FIG. 27 shows a bent part 314 of the winding end 312
It is explanatory drawing which illustrates the state pressed by 6.

FIG. 28 is an explanatory diagram illustrating a state in which the torsion action type 328 has its tip moved from the end of the coil 310 to a distance ΔL1.

FIG. 29 is an explanatory diagram showing a force relationship in the state of FIG. 28.

FIG. 30 is an explanatory view illustrating a state where the torsion action type 328 is moved from the end of the coil 310 to a distance ΔL2.

FIG. 31 is an explanatory diagram illustrating a force relationship in the state of FIG. 30;

FIG. 32 is an explanatory diagram illustrating a state in which a winding end 312 is sandwiched between a first pressing die 322 and a second pressing die 326;

FIG. 33 is an explanatory diagram illustrating an operation of a second pressing die 326B of a modified example when the torsion portion 316 is formed.

[Explanation of symbols]

110 coil, 112 winding end, 112a site, 11
2b Double bending portion, 112c site, 120 lead forming device, 122 fixing portion, 124 first fixing type, 124b
Double bend receiving part, 124c Wedge support part, 126 second fixed type, 126b Double bend receiving part, 126c Angle setting part, 12
8 1st bending type, 128b Double bending forming part, 130 2nd bending type, 134-140 Actuator, 150
Electronic control unit, 152 CPU, 154 ROM,
156 RAM, 212 winding end, 220 lead forming device, 222 convex, 224 convex, 226 storage, 2
28 small convex part, 230 coil spring, 240 concave type, 242 concave part, 310 coil, 312 winding end, 3
14 bent part, 316 twisted part, 318 bent torsion part, 320 lead forming device, 322 first pressing die, 32
4 Bending type, 326, 326B Second pressing type, 328 torsion action type, 332 Bidirectional actuator, 334 ~
338 Actuator.

Claims (21)

[Claims] 1. A lead forming apparatus for forming a lead by forming a bend along at least two different planes at a winding end of a coil, comprising: at least one fixing means for fixing the coil; A first bend capable of bending a portion corresponding to an end of the coil at a winding end of the fixed coil along a first surface including a tangent of the coil at the winding end in cooperation with a fixed type of fixing means; A first bending means having a mold, and at least a part of a winding end of the bent coil cooperating with a fixed mold of the fixing means and / or a first bending mold of the one bending means is formed on the first surface. And a second bending means having a second bending type that can be bent along different second surfaces. 2. The first bending type of the first bending means,
The lead forming apparatus according to claim 1, wherein a portion corresponding to an end of the coil at the winding end is a type that can be bent by approximately 90 degrees. 3. The first bending type of the first bending means,
The lead forming apparatus according to claim 1, wherein the winding end is a mold capable of forming a bend along the first surface at at least one position on an end side of a portion corresponding to an end of the coil. 4. The second bending type of the second bending means,
4. The lead forming apparatus according to claim 1, wherein the second surface is a surface substantially perpendicular to the first surface. 5. A lead forming method for forming a lead by forming a bend along at least two different planes at a winding end of a coil, wherein a portion corresponding to an end of the coil at a winding end of a fixed coil. Bending along a first surface including a tangent of the coil at the winding end, and at least a part of the winding end of the bent coil
A second bending step of bending along a second surface different from the first surface. 6. The coil lead forming method according to claim 5, wherein the first bending step is a step of bending a portion corresponding to an end of the coil at the winding end by approximately 90 degrees. 7. The first bending step is a step of forming a bend along the first surface at at least one position on the end side of a portion corresponding to the end of the coil at the winding end. Item 7. The lead forming method according to Item 5 or 6. 8. The lead forming method according to claim 15, wherein the second bending step is a step of bending a surface substantially orthogonal to the first surface as the second surface. 9. A lead forming apparatus for forming a lead by forming a predetermined concave portion by embossing using a concave shape and a convex shape at a winding end of a coil, wherein the convex shape cooperates with the concave shape. A lead forming apparatus comprising: a preforming means for preliminarily forming a small recess smaller than the predetermined recess at a portion of the winding end of the coil where the predetermined recess is formed. 10. The storage device according to claim 1, wherein the preliminary forming unit includes a storage protrusion that can be stored in the protrusion, and can form a part of a tip of the protrusion, and a storage part of the storage protrusion of the protrusion. 10. The lead forming apparatus according to claim 9, further comprising: an urging means disposed on the housing and urging the housing convex portion outward with a predetermined urging force. 11. A lead forming method for forming a lead by forming a predetermined concave portion at a winding end of a coil, comprising: a first concave shape and a first convex shape capable of forming a small concave portion smaller than the predetermined concave portion. A small concave portion forming step of forming the small concave portion at a portion of the winding end of the coil where the predetermined concave portion is formed, and a second concave shape and a second convex shape capable of forming the predetermined concave portion. Forming a predetermined concave portion at a portion where the small concave portion is formed by using the method. 12. The lead forming method according to claim 11, wherein the first concave mold is the same mold as the second concave mold, and wherein the second convex mold has a first convex part on the convex part. And a biasing means disposed so as to be capable of storing the convex portion of the first shape and disposed in a storage portion for storing the first convex portion, and biasing the convex portion outward with a predetermined biasing force. A lead forming method, wherein the small recess forming step and the recess forming step are steps performed continuously using the second concave mold and the second convex mold. 13. A coil formed by winding a rectangular wire, comprising: a lead bent at a first angle from a winding direction of the coil and having a bent torsion having a torsion at a second angle. 14. The coil according to claim 13, wherein said first angle and said second angle are both substantially 90 degrees. 15. The bent torsion part of the lead includes a bending part bent at the first angle from a winding end of the coil, and a torsion part continuous with the bending part and having a torsion at the second angle. The coil according to claim 13, wherein the coil comprises: 16. A lead forming apparatus for forming a lead by forming a lead by winding and winding at a winding end of a coil formed by winding a rectangular wire, wherein a winding is formed at a winding end of the coil in a normal direction of the coil. Bent portion forming means for forming a bent portion having a first angle from the tangential direction of the coil toward the coil, and a portion of the winding end where the bent portion is formed and / or a portion closer to the coil than the bent portion And a torsion forming means for forming a torsion at a second angle. 17. The first torsion forming means for applying a force along a coil axis to a predetermined portion of the winding end closer to the end than the bent portion, and the bent portion of the winding end. And / or the first part is located on the coil side of the bent portion.
The pressing force opposing the force acting by the action means is increased by at least 2 with the lapse of time of the action of the force by the first action means.
17. The lead forming apparatus according to claim 16, further comprising a second acting means for acting so as to be reduced over the steps. 18. The first torsion forming means for applying a force along a coil axis to a predetermined portion of the winding end closer to the end than the bent portion, and the first torsion means A second action in which the pressing force opposing the force to be applied is moved from the bent portion toward the coil side at least at two locations from the bent portion with the lapse of time of the action of the force by the first action means. 17. The lead forming apparatus according to claim 16, comprising means. 19. A lead forming method for forming a lead having a predetermined shape on a winding end of a coil formed by winding a rectangular wire, comprising: forming a lead on a winding end of the coil in a normal direction of the coil; Forming a bent portion having a first angle from the tangential direction; and forming a second angle at the bent portion of the winding end where the bent portion is formed and / or at a position closer to the coil than the bent portion. And a torsion forming step of forming a torsion. 20. The torsion forming step, wherein a predetermined force along an axis of a coil is applied to a predetermined portion of the winding end closer to the end than the bending portion, and the bending portion and / or the winding end of the winding end is applied. Forming a torsion by applying a pressing force opposing the predetermined force to a portion on the coil side of the bent portion so as to decrease over at least two stages with the lapse of time of the operation of the predetermined force. The lead forming method according to claim 20. 21. The torsion forming step includes applying a predetermined force along an axis of a coil to a predetermined portion on the end side of the winding end from the bent portion, and reducing a pressing force opposing the predetermined force. 20. The lead according to claim 19, wherein the lead is formed by moving the bent portion from the bent portion toward the coil side at least at two points and applying the twisted portion with the lapse of time of the action of the predetermined force. Forming method.