JP2011155724A - Peeling apparatus for insulation film, peeling method for the insulation film, and manufacturing method for coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide peeling apparatus for insulation film which removes the insulation film from a flat insulation lead wire having a square cross-section. <P>SOLUTION: The peeling apparatus for the insulating film 10 mainly is provided with a base 12; two sidewall supports 18A, 18B fixed to the base 12; a support plate 20 fixed across the sidewall supports 18A, 18B; a movable support 22 movably supported in a vertical direction (Z-direction) relative to the support plate 20; a second edge 16 fixed to the tip of the movable support 22, and first edges 14A, 14B provided movably in an X-direction on a paper face relative to the base 12. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an insulating film peeling apparatus for peeling an insulating film from an insulating wire in which a flat conductor is covered with an insulating film. Furthermore, the present invention relates to an insulating film peeling method and a coil manufacturing method using such an insulating film peeling apparatus.

  In general, an insulated wire called an enameled wire is provided with an insulating film made of an insulating paint around a conducting wire. When an electrical device such as a motor or a transformer is manufactured using this enameled wire, the enameled wire is generally continuously wound in a coil shape.

  In recent years, for example, coils of electrical equipment used in automobile generators and the like have been required to have a small and high-density magnetic flux. Therefore, instead of the conventional circular enameled wire having a circular cross section, the coil has a square cross section. A rectangular enameled wire (flat conductor) is used.

  When the rectangular conducting wire is formed into a coil shape, it is wound without any gap in the axial direction, so that the effective area occupied by the cross-sectional area of the coil in the axial cross-sectional area of the coil is increased. Therefore, the coil can be made smaller by generating a strong magnetic force by configuring the coil with a flat enameled wire.

  The manufacturing method of the coil described above is schematically as follows. First, a flat enameled wire is prepared in which the surface of a rectangular conductive wire having a quadrangular cross section is covered with an insulating film whose main material is an epoxy resin or the like. Next, the flat enamel wire is bent so as to be wound in the axial direction. As a result, an intermediate portion of the flat enamel wire wound in a coil shape becomes a coil portion, and a remaining portion continuous from both ends of the coil portion becomes a terminal portion used as a connection terminal used for connection to the outside.

  Since this terminal portion is connected to another electronic component (for example, a motor) using a conductive bonding material such as solder, it is necessary to remove the resin film covering the terminal portion.

  One method for removing the enameled wire insulation film is described in Patent Document 1 below. Referring to paragraph [0026] of the publication, first, an induction coil is wound around an enamel wire, and a high-frequency current is passed through the induction coil, whereby the enamel wire is heated to soften the insulating film. The softened portion of the insulating film is mechanically removed in a later step.

  Further, another method for removing the insulating film from the enameled wire is described in Patent Document 2 below. Paragraph numbers [0005] and [0015] of the document disclose a method for removing an insulating film of enameled wire by solvent peeling, soldering peeling, laser peeling, light beam peeling, mechanical peeling with a grindstone roller or a brush roll. Has been. Further, referring to [0023] of the document, a method for removing an insulating film from an enameled wire by drawing is also disclosed.

JP-A-5-56609 Japanese Patent Laid-Open No. 7-21892

  The method of removing the insulating film from the enameled wire disclosed in each of the above-mentioned documents is roughly classified into a method using heating using a dielectric coil, a chemical method using solution peeling, and a mechanical method using a grindstone roller or the like. However, each of these methods includes the following problems.

  The method of peeling the insulating film by heating with a dielectric coil is complicated in the process of inserting the enameled wire to be peeled into the coil, and is further supplied to the dielectric coil so that the temperature of the insulating film is moderately softened. There is a problem that it is not easy to adjust the power.

  In the method of stripping the insulating film by a chemical method, the solution used for stripping is a strong alkali or a strong acid. Therefore, it is dangerous to use such a solution, and there is a problem that waste liquid treatment after use is not easy.

  Further, according to the mechanical method, it is possible to peel the insulating film more safely and reliably than the above two methods. However, the inventions described in the above-mentioned documents are intended for round enameled wires with a circular cross section, and it is difficult to apply these peeling methods as they are to flat enameled wires with a square cross section. It is.

  Furthermore, in order to remove the insulating film covering the terminal portion of the coil in which the enameled wire is wound in a cylindrical shape, a means for holding the coil having a complicated shape is required. However, the above document discloses this matter. Absent.

  Another method is to evaporate and remove the insulating film by irradiating the enamelled wire with a laser. However, this method may cause the conductor portion of the enamel wire to be oxidized by the heat during laser irradiation, and the cost of the laser irradiator is very high, resulting in high costs.

  The present invention has been made in view of such problems, and an object of the present invention is to provide an insulating film peeling apparatus and an insulating film peeling method for reliably removing an insulating film from a rectangular insulated conductor having a square cross section. And it is providing the manufacturing method of a coil.

  The present invention is an insulating film peeling apparatus for partially peeling the insulating film from an insulating conductor whose surface is covered with an insulating film. The first is to fix the insulating conductor by biting into the insulating conductor. An edge portion, and a second edge portion that bites into the insulated conducting wire at a position different from the first edge portion less than the first edge portion, and whichever of the first edge portion and the second edge portion One of them is moved so that they are separated from each other in the length direction of the insulated conductor, whereby the insulating film is peeled off at the second edge portion.

  The present invention is an insulating film peeling method for partially peeling the insulating film from an insulating conductor whose surface is covered with an insulating film, and the first edge portion is bitten into the insulating conductor. A first step of fixing the position of the insulated conductor; a second step of causing the second edge portion to bite into the insulated conductor at a position different from the first edge portion and less than the first edge portion; The second edge portion is moved by moving the first edge portion or the second edge portion away from each other in the length direction of the insulated conductor wire while the insulated conductor wire is fixed at the first edge portion. And a third step of peeling off the insulating film.

  In the coil manufacturing method of the present invention, a flat conductive wire whose surface is covered with an insulating film, and an insulating conductive wire that forms a cylindrically bent coil portion and a terminal portion continuous with the coil portion are prepared. The first step, the second step of fixing the position of the terminal portion by biting the first edge portion into the terminal portion, and the terminal at a position different from the first edge portion of the second edge portion A third step of causing the portion to bite less than the first edge portion, and the terminal portion being fixed by the first edge portion, the first edge portion or the second edge portion being the length of the terminal portion And a fourth step of peeling the insulating film at the second edge portion by moving the two so as to be separated in the vertical direction.

  According to the present invention, when the insulating film covering the insulated conductor, which is a flat conductor, is peeled off, first, the insulated conductor is fixed by the first edge part that penetrates deeply, and the second edge part bites into the insulated conductor relatively shallowly. It is In this state, by moving the first edge portion and the second edge portion relative to each other in the direction in which they are separated from each other, the insulated conductor moves together with the first edge portion. As a result, the insulating film is formed by the second edge portion. Is peeled off from the insulated conductor. Therefore, the insulation film can be reliably peeled off by the second edge portion for each main surface of the insulated conducting wire that is a flat conducting wire.

It is a perspective view which shows the insulating film peeling apparatus of this invention. It is a perspective view which shows the insulated lead wire before an insulation film peels by this invention. It is a figure which shows the peeling method of the insulating film of this invention, (A) is a side view, (B) is a top view. It is a figure which shows the peeling method of the insulating film of this invention, (A) is the top view seen from upper direction, (B) is a figure which expands and shows (A) partially, (C) is It is the figure seen from the side, (D) is a figure which expands and shows (C) partially. It is a figure which shows the peeling method of the insulating film of this invention, (A) is the top view seen from upper direction, (B) is the figure seen from the side, (C) is (B) partially FIG. It is a perspective view which shows the insulated lead wire after the insulating film was peeled by this invention. (A) is a perspective view which shows the coil manufactured by this invention, (B) is sectional drawing in the B-B 'line | wire of (A). It is a top view which shows the process of peeling an insulating film from a terminal part in the manufacturing method of the coil of this invention. It is a figure which shows the insulating film peeling apparatus of the other form of this invention, (A) is a perspective view, (B) is expanded sectional drawing.

  With reference to the perspective view of FIG. 1, the structure of the insulating film peeling apparatus 10 which concerns on this form is demonstrated.

  First, in this embodiment, the following description will be given using the X axis, the Y axis, and the Z axis that are orthogonal to each other. Here, the XZ plane including the X axis and the Z axis is a plane parallel to the cross section of the insulated conductor 24. On the other hand, the Y axis is an axis parallel to the longitudinal direction of the insulated conductor 24.

  The insulating film peeling apparatus 10 includes a pedestal 12, two side wall support portions 18 </ b> A and 18 </ b> B fixed to the pedestal 12, a support plate 20 that is bridged and fixed above the side wall support portions 18 </ b> A and 18 </ b> B, and a support plate 20. On the other hand, a movable support portion 22 supported so as to be movable in the vertical direction (Z direction), a second edge portion 16 fixed to the tip of the movable support portion 22, and a pedestal 12 are provided so as to be movable in the X direction. The first edge portions 14A and 14B are mainly provided.

  The function of the insulating film peeling apparatus 10 is to partially peel the insulating film covering each surface of the flat wire 26. Further, each member of the insulating film peeling apparatus 10 is made of a metal such as stainless steel, and in particular, the first edge portions 14A and 14B and the second edge portion 16 are materials whose hardness is higher than that of copper which is a material of the insulating conducting wire 24. (For example, brass). In this way, by using a material having high hardness as the material of each edge portion, the insulating film covering the insulated conductor 24 can be more reliably peeled off. Furthermore, wear of each edge part accompanying the peeling operation is suppressed, and the edge part can be used for a long period of time, so that the running cost is reduced.

  Although not shown, the movable parts (movable support part 22, pedestal 12, first edge parts 14A, 14B) at each of the above parts are driven by the pressure of a gas supplied from a compressor or a motor. . Furthermore, a control unit (not shown) that controls the operation of these movable units is also arranged on the back surface of the base 12. This control unit is configured by arranging predetermined circuit elements such as LSIs on a mounting substrate and connecting them to each other. Furthermore, a switch such as a foot switch for controlling the operation of the insulating film peeling apparatus 10 is provided.

  As described above, the first edge portions 14A and 14B are provided on the side surface of the end portion of the base 12 in the + Y direction so as to be movable in the X direction. These have a function of fixing the position of the insulated conductor 24 sandwiched from the left and right sides. When the insulated edge 24 is held, the first edge portion 14 </ b> A moves in the −X direction and bites into the + X side surface of the insulated conductor 24. On the other hand, the other first edge portion 14B simultaneously moves to the + X side and bites into the −X side surface of the insulated conductor 24. The first edge portions 14 </ b> A and 14 </ b> B continuously support the insulated conductor 24 until the insulation film peeling of the insulated conductor 24 is completed. After the separation is completed, the first edge portions 14A and 14B move in a direction away from the insulated conductor 24, and the insulated conductor 24 is released. Further, the first edge portions 14A and 14B move in the + Y direction together with the base 12 when the peeling operation is performed. This matter will be described later with reference to FIG.

  The second edge portion 16 is fixed to the end portion in the + Y direction of the movable support portion 22 and is supported by the support plate 20 via the movable support portion 22. The second edge portion 16 has a function of peeling off the insulating film covering the upper surface of the insulated conductor 24. The second edge portion 16 is supported by the support plate 20 together with the movable support portion 22 so as to be movable in the Z direction. Furthermore, the movable support portion 22 is supported by the support plate 20 via movable fastening means such as screws.

  Therefore, by rotating this screw to adjust the relative positional relationship between the support plate 20 and the movable support portion 22 in the Z direction, the depth at which the second edge portion 16 bites into the insulated conductor 24 is determined. it can. Specifically, by setting the position of the movable support portion 22 upward by adjusting the screw, the depth at which the second edge portion 16 fixed to the movable support portion 22 bites into the insulated conductor 24 becomes shallow. On the other hand, by performing the reverse setting and adjusting the position of the movable support portion 22 downward, the depth at which the second edge portion 16 fixed to the movable support portion 22 bites into the insulated conductor 24 is increased.

  In order to peel the insulating film from the insulated conductor 24, the first edge portions 14A and 14B and the second edge portion 16 need to be separated along the Y-axis direction. In this embodiment, with respect to the Y-axis direction, the first edge portions 14A and 14B are moved together with the base 12 while the position of the second edge portion 16 is fixed, thereby separating them. This matter will be described later as a peeling method.

  In this embodiment, only the first edge portions 14A and 14B are moved in the Y-axis direction at the time of peeling, but the second edge portion 16 is moved to the Y position with the positions of the first edge portions 14A and 14B fixed. It is also possible to move in the axial direction, or to move them away from each other.

  With reference to the perspective view of FIG. 2, the structure of the insulation conducting wire 24 from which the insulating film is peeled off by the insulating film peeling apparatus 10 of this embodiment will be described.

  The insulated conducting wire 24 is a flat conducting wire 26 made of copper and covered with an insulating film 28 and is generally called a rectangular enameled wire. The cross-sectional shape of the insulated conducting wire 24 is a rectangular shape, specifically, a so-called “rounded rectangle” with rounded corners. An example of a specific cross-sectional size of the insulated conductor 24 is that the horizontal length L11 is about 5 mm and the vertical length L12 is about 2 mm. Furthermore, the surface of the insulated conducting wire 24 includes a first main surface 24A, a second main surface 24B, a first side surface 24C, and a second side surface 24D.

  The surface of the flat conducting wire 26 is covered with an insulating film 28. In this way, the surface of the insulating film 28 is entirely covered with the insulating film 28, so that the insulating property of the surface of the insulated conductor 24 is ensured. The insulating film 28 is made of an insulating material whose main material is a resin material having a thickness of about 30 μm to 50 μm. As an example of a specific material of the insulating film 28, the insulating film 28 is composed of a two-layer resin film of a polyesterimide that covers the surface of the flat wire 26 and a polyamideimide that covers the surface of the polyesterimide. In order to increase the pressure resistance, the insulating film 28 is firmly adhered to the surface of the flat wire 26, so that it is not easy to peel the insulating film 28 from the flat wire 26. In this embodiment, the insulating film 28 is reliably peeled off by removing the outermost layer of the flat conducting wire 26 together with the insulating film 28 at the second edge portion 16 described above.

  Next, with reference to FIGS. 3 to 5, a method for peeling the insulating film from the insulating conductive wire 24 using the insulating film peeling apparatus 10 having the above-described configuration will be described.

  With reference to FIG. 3, first, the insulated conductor 24 is set on the base 12. 3A is a side view of the insulating film peeling apparatus 10 shown in FIG. 1 viewed from the lateral direction, and FIG. 3B is a plan view of the insulating film peeling apparatus 10 viewed from above.

  By inserting the insulated conductor 24 between the first edge portions 14 </ b> A and 14 </ b> B, the end of the insulated conductor 24 is placed on the upper surface of the base 12. The length of the region where the insulating film is peeled is determined by the position of the insulated conductor 24 to be placed. That is, referring to FIG. 3A, in this embodiment, the insulating film covering the upper surface of the insulated conductor 24 is peeled, but the region where the peeling is performed is the end of the second edge portion 16 in the + Y direction. It is a portion on the −Y direction side from (the cutting edge).

  In this step, the second main surface 24B, which is the largest surface (main surface) among the surfaces of the insulated conductor 24 shown in FIG. 3A, is brought into contact with the upper surface of the pedestal 12 to cover the first main surface 24A. The insulating film to be peeled is partially peeled off by the second edge portion 16. Referring to FIG. 3B, the first side surface 24C and the second side surface 24D of the insulated conductor 24 are arranged so as to face the first edge portion 14A and the first edge portion 14B.

  The positional relationship of the surface of the insulated conductor 24 can be changed as appropriate. For example, the insulated conductor 24 is arranged so that the side surface of the insulated conductor abuts the upper surface of the base 12 and the main surfaces face the first edge portions 14A and 14B. May be.

  Here, the arrangement of the insulated conductors 24 described above may be performed by a dedicated device that transports and arranges the insulated conductors 24, or may be performed manually by an operator.

  Referring to FIG. 4, next, the first edge portions 14 </ b> A and 14 </ b> B are bitten into the insulated conductor 24 to fix the position thereof, and the second edge portion 16 to be peeled is bitten into the upper surface of the insulated conductor 24. .

  4A is a plan view of the insulating film peeling apparatus in this process as viewed from above, and FIG. 4B is a partially enlarged view of FIG. 4A. ) Is a view of the insulating film peeling apparatus in this process as viewed from the side, and FIG. 4 (D) is a partially enlarged view of FIG. 4 (C).

  Referring to FIG. 4A, the first edge portion 14A is moved in the −X direction, and the first edge portion 14B is moved in the + X direction. The displacement amounts of the first edge portion 14A and the second edge portion 16 are the same. As described above, the first edge portions 14A and 14B are provided on the side surface of the end portion of the pedestal 12 in the + Y direction so as to be movable in the X direction.

  Referring to FIG. 4B, the cutting edge 32 of the first edge portion 14 </ b> A bites into the first side surface 24 </ b> C of the insulated conductor 24. Further, the cutting edge 34 of the first edge portion 14 </ b> B bites into the second side surface 24 </ b> D of the insulated conductor 24. The cutting edges 32 and 34 at both edge portions penetrate the insulating film 28 and reach the flat conductive wire 26. The depth L2 that the first edge portion 14A bites into the first side surface 24C is, for example, 0.3 mm or more and 0.5 mm or less, and the depth L3 that the first edge portion 14 bites from the second side surface 24D is the same as L2. As the first edge portions 14 </ b> A and 14 </ b> B bite in this way, the insulated conductor 24 is fixed to the base 12.

  4B, the cutting edge 32 of the first edge portion 14A has a so-called single-edged shape, the side surface in the + Y direction of the cutting edge 32 is flat, and the side surface in the −Y direction of the cutting edge 32 is inclined. It consists of the side to be. This shape is the same for the other first edge portion 14B. By forming the cutting edges 32 and 34 of the first edge portions 14A and 14B in such a shape, the first edge portions 14A and 14B firmly hold the insulated conductor 24 in the + Y direction. Therefore, the action of the first edge portions 14A and 14B holding the insulated conducting wire 24 is larger than the action of the second edge portion 16 holding the insulated conducting wire 24, and as a result, the peeling of this embodiment is performed more accurately. It will be.

  Referring to FIG. 4C, after the fixing by the first edge portions 14A and 14B is completed, the second edge portion 16 is moved downward (in the −Z direction), and the cutting edge of the first edge portion is insulated. The upper surface of 24 is bitten. With reference to FIG. 1, this movement is performed by moving the movable support portion 22 to which the second edge portion 16 is fixed downward by a driving force such as a compressor. Since the insulated conductor 24 is stably supported by the pedestal 12, the amount of the second edge portion 16 biting into the insulated conductor 24 can be precisely controlled.

  With reference to FIG. 4D, the cutting edge 30 of the second edge portion 16 penetrates through the insulating film 28 covering the upper surface of the insulating conducting wire 24 and reaches the uppermost portion of the flat conducting wire 26. The depth L1 that the second edge portion 16 bites into the insulated conductor 24 is, for example, not less than 0.1 mm and not more than 0.2 mm. The depth L1 at which the second edge portion 16 bites into the insulated conducting wire 24 is set to be shallower than the depth at which the first edge portions 14A, 14B bite into the side surfaces of the insulated conducting wire 24. Preferably, the depth L1 (see FIG. 4D) that the second edge portion 16 bites into the upper surface of the insulated conductor 24 is the depth L2 that the first edge portion 14A bites and the depth that the first edge portion 14B bites. It is set shorter than the length obtained by adding L3 (see FIG. 4B). In this way, the position of the insulating conductor 24 can be fixed by the first edge portions 14 </ b> A and 14 </ b> B and the second edge portion 16, and the insulating film 28 can be peeled by the second edge portion 16. Details of this matter will be described later with reference to FIG.

  Further, referring to FIG. 4D, the shape of the blade edge 30 of the second edge portion 16 is a single-edged shape, the side surface in the + Y direction is flat, and the side surface in the −Y direction is an inclined surface. By doing so, the action of the second edge portion 16 holding the insulated conductor 24 in the −Y direction is reduced, and as a result, the insulating film 28 is smoothly peeled off at the cutting edge 30 of the second edge portion 16. It will be.

  Here, the above biting of each edge is controlled by the pressure by the compressor. That is, when the first edge portions 14A and 14B are bitten into the insulated conductor 24, they are moved with a strong pressure by the compressor. Further, when the second edge portion 16 bites into the insulated conductor 24, a relatively low pressure is used as compared with the first edge portions 14A and 14B.

  Next, referring to FIG. 5, the insulating film 28 that covers the upper surface of the insulated conductor 24 at the second edge portion 16 is peeled off and removed. FIG. 5A is a view of the insulating film peeling apparatus in this process as viewed from above, and FIG. 5B is a view of the insulating film peeling apparatus in this process as viewed from the side. FIG. FIG. 6 is a partially enlarged view of FIG.

  In this step, referring to FIG. 5A, the first edge portions 14A and 14B are moved in the + Y direction together with the pedestal 12 while the position of the second edge portion 16 is fixed. Referring to this figure, when pedestal 12 is moved in the + Y direction, first edge portions 14A and 14B provided on pedestal 12 are also moved in the + Y direction. As described above, since the second edge portion 16 does not move in the Y direction, the first edge portions 14A and 14B and the second edge portion 16 are moved in the Y axis direction by moving the base 12 in this way. Separate.

  In this step, the above movement is performed while the first edge portions 14A and 14B and the second edge portion 16 are biting into the insulated conductor 24. Further, the depth at which the second edge portion 16 bites into the insulated conductor 24 is shallower than the depth at which the first edge portions 14A, 14B bite. In other words, the force with which the second edge portion 16 fixes the insulated conductor 24 is smaller than the force with which the first edge portions 14 </ b> A and 14 </ b> B fix the insulated conductor 24. Accordingly, when both edge portions are individually fixed to the insulated conductor 24 and moved in the direction in which they are separated from each other, the insulated conductor 24 is moved in the + Y direction together with the first edge portions 14A and 14B. The insulated conductor 24 moves in the + Y direction with respect to the edge portion 16.

  Referring to FIG. 5C, at this time, the insulating conductor 24 moves with respect to the second edge portion 16 in a state where the second edge portion 16 bites into the upper surface of the insulating conductor 24. The insulating film 28 covering the insulated conductor 24 is peeled off and removed. Further, in this step, the uppermost portion (about 0.2 mm) of the flat conductor 26 is peeled and removed together with the insulating film 28 covering the upper surface of the flat conductor 26. Separation by this movement is performed until the end of the insulated conductor 24 is reached.

  After the above process is completed, referring to FIG. 5A and FIG. 5B, the first edge portions 14A and 14B are moved in a direction away from the insulated conductor 24, and the second edge portion 16 is moved further. Pull up in the + Z direction. By doing in this way, fixation of the insulated conducting wire 24 by both edge parts is cancelled | released.

  After the above process is completed, referring to FIG. 3, the insulating conductor 24 is set again in the insulating film peeling apparatus so that the first main surface 24A becomes the lower surface, and the description is made with reference to FIGS. The peeling method is applied to the second main surface 24B which is the upper surface. At this time, the insulating film 28 covering the second main surface 24 </ b> B of the insulated conductor 24 is peeled off by the second edge portion 16.

  Similarly, the insulating film 28 covering the first side surface 24C and the second side surface 24D of the insulated conductor 24 is peeled off and removed. At this time, the first edge portions 14A and 14B shown in FIG. 3B bite into the first main surface 24A and the second main surface 24B of the insulated conducting wire 24 to fix the position of the insulated conducting wire 24. Further, the insulating film 28 covering the first side surface 24C and the second side surface 24D is peeled off by the second edge portion 16 shown in FIG.

  Here, with reference to FIG. 5C, when the insulating film 28 cannot be completely peeled off by a single peeling operation by the second edge portion 16, the peeling of the insulating film 28 is performed by performing this peeling work a plurality of times. May be performed.

  FIG. 6 shows an insulated wire from which the insulating film 28 at the end has been removed by the above-described process. Here, the insulating film 28 covering the first main surface 24A, the second main surface 24B, the first side surface 24C, and the second side surface 24D is removed in the vicinity of the end portion of the insulated conductor 24 in the + Y direction. By such removal, the end portion in the + Y direction of the insulated conducting wire 24 becomes the terminal portion 36 where the metal material of the flat conducting wire 26 is exposed. The terminal portion 36 is electrically connected to the conductive pattern of the mounting board via a conductive bonding material such as solder.

  In addition, as described above, since the resurfacing layer of the flat conductor 26 is removed together with the insulating film 28 by the second edge portion 16, the surface of the exposed flat conductor 26 is a roughened surface. . As a result, it is expected that a conductive bonding material such as solder fits into the fine irregularities provided on the surface of the flat conducting wire 26 and the adhesion strength between them is improved.

  With reference to FIG. 7, there is a coil manufacturing method as an application example of the above-described peeling apparatus and peeling method. 7A is a perspective view showing the coil 40, and FIG. 7B is a cross-sectional view taken along line B-B 'of FIG. 7A.

  Referring to FIG. 7A, the coil 40 includes a coil portion 42 in which an insulated conductor is wound in a coil shape. In addition, a first terminal portion 46 protruding upward from the upper end of the coil portion 42 is provided, and a second terminal portion 48 leading out from the lower end of the coil portion 42 to the side is provided.

  In the coil 40, since the above-described flat rectangular conductive wire is curved in a coil shape, the effective area occupied by the coil portion with respect to the entire cross-sectional area shown in FIG. A strong magnetic field.

  With reference to FIG. 7 (B), in the 1st terminal part 46 and the 2nd terminal part 48, conduction | electrical_connection with the exterior is ensured by removing the insulating film which coat | covers the surface. When the coil 40 is mounted on a mounting substrate or the like, the first terminal portion 46 and the second terminal portion 48 are inserted into holes provided in the mounting substrate. Then, by soldering both terminal portions, the coil 40 is electrically connected to the conductive pattern on the mounting substrate.

  With reference to FIG. 8, the method of peeling an insulating film in the terminal part of the coil 40 is demonstrated. The method for peeling off the insulating film is basically the same as the method described with reference to FIGS.

  As a method for manufacturing a coil, first, an insulated conductor having a coil portion 42, a first terminal portion 46, and a second terminal portion 48 as shown in FIG. 7A is prepared. And the side surface of the front-end | tip part of the 1st terminal part 46 of the coil 40 is fixed by 1st edge part 14A, 14B, and the 2nd edge part 16 bites further from the upper surface. Furthermore, in this state, the first terminal portion 46 is moved in the + Y direction together with the base 12 by moving the first terminal portion 46 fixed to the first edge portions 14A and 14B while the position of the second edge portion 16 is fixed. The insulating film covering 46 is peeled off. This peeling operation is performed on the four main surfaces and side surfaces of the first terminal portion 46. Furthermore, after the peeling of the insulating film at the first terminal portion 46 is completed, the peeling operation is similarly performed on the second terminal portion 48. As a result, the insulating film covering both terminal portions is peeled off, and the conductive material is exposed to the outside and can be connected. By performing such an operation, the coil 40 is manufactured.

  In this step, since the first terminal portion 46 is fixed from the side by the first edge portions 14A and 14B, it is possible to perform the peeling operation at the boundary portion between the coil 40 and the first terminal portion 46. Become.

  The present embodiment described above can be modified as follows.

  Referring to FIG. 1, in the above description, the first edge portions 14 </ b> A and 14 </ b> B that fix the position of the insulated conducting wire 24 are arranged on the side of the insulated conducting wire 24, and the second edge portion 16 that peels the insulating film from the insulated conducting wire 24. However, it is also possible to arrange these edge portions at different locations.

  For example, both the first edge portion 14 </ b> A and the second edge portion 16 may be disposed above the insulated conductor 24. In this case, the first edge portion 14A bites into the insulated conductor 24 deeply from the upper surface, and the second edge portion 16 gets relatively shallow and bites into the insulated conductor wire 24 from the upper surface. Further, by moving the first edge portion 14A away from the second edge portion 16, the insulated conducting wire 24 moves together with the first edge portion 14A, and along with this movement, the second edge portion 16 causes the upper surface of the insulated conducting wire to move. The insulating film covering the film is peeled off.

  Further, in the present embodiment, referring to each drawing of FIG. 4, by adjusting the depth at which each edge portion bites into the insulated conducting wire 24, the force at which the first edge portion 14 holds the insulated conducting wire 24 is changed to the second edge. The portion 16 can be made larger than the force for holding the insulated conductor 24. Specifically, the depth at which both edge portions bite in is the same, and the cross-sectional area (the cross-sectional area seen from the Y direction) of the portion where the first edge portions 14A and 14B bite into the insulated conductor 24 is expressed as the second edge portion 16. Is larger than the cross-sectional area (cross-sectional area viewed from the Y direction) that bites into the insulated conductor 24. In this way, the holding force of the first edge portions 14A and 14B is larger than the holding force of the second edge portion 16, and as a result, the insulating film 28 is easily peeled off by the second edge portion 16. . Furthermore, even if the depth at which the first edge portion 14A and the like bites into the insulated conductor 24 becomes shallower than that of the second edge portion 16, if the magnitude relation of the cross-sectional area is maintained, the second edge portion 16 The insulating film 28 can be peeled off.

  With reference to FIG. 9, the other form of 1st edge part 14A, 14B with which a peeling apparatus is equipped is demonstrated. FIG. 9A is a perspective view showing a first edge portion according to another embodiment, and FIG. 9B is a cross-sectional view showing a state in which the first edge portion bites into the insulated conductor 24.

  The first edge portions 14 </ b> A and 14 </ b> B described here are for peeling the insulating film from the flat insulating conductor 24 having a thickness of about 0.2 mm to 0.8 mm. That is, when such a thin insulated conductor 24 is bitten and fixed from the side using the first edge portions 14A and 14B shown in FIG. 1, the thin insulated conductor 24 is pressed by the pressing force applied by the first edge portions 14A and 14B. 24 may be deformed. In order to eliminate such a problem, here, the insulated conductor 24 is pressed and fixed from above and below at the first edge portions 14A and 14B. Further, although the fixing method and shape are different, the first edge portions 14A and 14B shown in this figure can be used in the same manner as described above with the pedestal 12 shown in FIG.

  Specifically, referring to FIG. 9A, a cutting edge 32 is provided at the upper right end of the first edge portion 14A. Further, a blade edge 34 is provided at the lower left end of the first edge portion 14B. The cutting edge 32 of the first edge portion 14A is disposed below the cutting edge 34 of the first edge portion 14B. Further, the double-edged edges 32 and 34 have a single-edged shape, and this matter is the same as that described with reference to FIG.

  The first edge portions 14A and 14B are fixed to the base 12 shown in FIG. By adjusting the position where the first edge portions 14A, 14B are attached to the pedestal with the attachment screw 52, the depth at which the blade edges 32, 34 bite into the insulated conductor 24 is determined. Also here, the first edge portions 14A and 14B have a function of deeply biting into and fixing the insulated conductor 24, and the second edge portion 16 has a function of relatively shallowly biting into the insulated conductor 24 and peeling off the insulating film 28. Further, the depth of biting may be changed, and the insulating conductive wire 24 may be fixed at the second edge portion 16 and the insulating film 28 may be peeled off at the first edge portions 14A and 14B.

  When the insulating film is peeled off from the insulated conductor 24, first, the insulated conductor 24 is placed on the upper surface of a base (not shown). Next, the first edge portion 14A is moved in the −X direction, and at the same time, the first edge portion 14B is moved in the + X direction.

  9B, the cutting edge 32 of the first edge portion 14A bites into the lower surface of the insulated conducting wire 24, and the cutting edge 34 of the first edge portion 14B bites into the upper surface of the insulating conducting wire 24. The depth L6 at which the blade edge 32 of the first edge portion 14A bites into the insulated conductor 24 from the upper surface and the depth L5 at which the blade edge 34 of the first edge portion 14B bites into the insulated conductor wire 24 from the lower surface are the same. L5 and L6 are 0.02 mm or more and 0.04 mm or less if the thickness of the insulated conductor 24 is 0.2 mm, and 0.05 mm or more and 0.08 mm or less if the thickness of the insulated conductor 24 is 0.8 mm. .

  Next, referring to FIG. 9A, the cutting edge of the second edge portion 16 is caused to bite into the insulated conductor 24 from the upper surface. The depth at which the cutting edge of the second edge portion 16 bites into the insulated conductor 24 is smaller than that of the first edge portion 14A. Here, the biting is small means that the biting depth is shallow, the cross-sectional area of the biting blade tip portion is small, or both. As a result, the holding force at which the first edge portions 14 </ b> A and 14 </ b> B hold the insulated conducting wire 24 is greater than the holding force at which the second edge portion 16 holds the insulated conducting wire 24.

  Next, as shown in FIG. 1, by moving the pedestal to which the first edge portions 14A and 14B are attached in the + Y direction, the insulated conductor 24 moves in the + Y direction together with the first edge portions 14A and 14B. As a result, the insulating film 28 covering the upper surface of the insulated conductor 24 is peeled off by the cutting edge of the second edge portion 16.

  Other matters are the same as in the above case, and by doing so, the insulating film 28 can be peeled without breaking the shape even if the insulated conductor 24 is extremely thin.

  Further, in this embodiment, referring to FIG. 9B, the support portion 54 is brought into contact with the −Y side main surface of the first edge portion 14B, and the support portion 56 is contacted with the −Y side main surface of the first edge portion 14A. Are in contact. The support portions 54 and 56 are formed by processing a metal such as aluminum into a predetermined shape, and are formed thicker in the Y direction than both edge portions.

  In this way, the first edge portion 14B is mechanically supported by the support portion 54, and the first edge portion 14B is mechanically supported by the support portion 56. Therefore, by performing the above-described peeling processing, even if a stress that causes the first edge portions 14A and 14B to bend toward the -Y side acts, these edge portions are mechanically supported by both support portions 54 and 56. Thus, the bending and destruction of both edge portions accompanying the peeling process are prevented.

DESCRIPTION OF SYMBOLS 10 Insulation film peeling apparatus 12 Base 14, 14A, 14B 1st edge part 16 2nd edge part 18, 18A, 18B Side wall support part 20 Support plate 22 Movable support part 24 Insulation conducting wire 24A 1st main surface 24B 2nd main surface 24C First side surface 24D Second side surface 26 Flat conductor 28 Insulating film 30 Cutting edge 32 Cutting edge 34 Cutting edge 36 Terminal section 40 Coil 42 Coil section 46 First terminal section 48 Second terminal section 52 Mounting screw 54 Support section 56 Support section

Claims (9)

An insulating film peeling apparatus that partially peels the insulating film from an insulating wire whose surface is covered with an insulating film.
A first edge portion for fixing the insulated conductor by biting into the insulated conductor;
A second edge portion that bites less into the insulated conductor at a position different from the first edge portion than the first edge portion;
The insulating film is peeled off at the second edge portion by moving either the first edge portion or the second edge portion so that they are separated from each other in the length direction of the insulated conductor. Insulating film peeling device. The second edge portion bites into the insulated conductor on the end side of the first edge portion,
2. The insulating film peeling apparatus according to claim 1, wherein when the insulating film is peeled off, the second edge portion moves relatively toward an end portion side of the insulating conducting wire. The insulated lead wire comprising a first main surface, a second main surface, a first side surface and a second side surface is disposed such that the first main surface contacts the upper surface of the pedestal,
The first edge portion bites into the insulated conducting wire from the first side surface and the second side surface, thereby fixing the position of the insulated conducting wire,
3. The insulating film peeling apparatus according to claim 2, wherein the second edge portion cuts into the second main surface and peels off the insulating film covering the second main surface. 4. The first edge portion is provided on the pedestal in a movable state with respect to the biting direction,
When the second edge portion peels off the insulating film, the second edge portion is fixed in the length direction of the insulated conductor together with the base while the position of the second edge portion is fixed with respect to the length direction of the insulated conductor. The insulating film peeling apparatus according to claim 3, wherein the insulating conducting wire is moved at the first edge portion that moves relative to the first edge portion.   5. The insulating film peeling apparatus according to claim 4, wherein the second edge portion cuts in a cross-sectional area narrower than the first edge portion or bites shallower than the first edge portion. The insulated conductor is disposed such that the first main surface is in contact with an upper surface of a flat base,
The first edge portion bites into the second main surface to fix the position of the insulated conductor,
The said 2nd edge part bites into the said 2nd main surface of the edge part side rather than the said 1st edge part, and peels off the said insulating film which coat | covers the said 2nd main surface. The insulating film peeling apparatus as described. The insulated lead wire comprising a first main surface, a second main surface, a first side surface and a second side surface is disposed such that the first main surface contacts the upper surface of the pedestal,
The first edge portion bites into the first main surface and the second main surface to fix the position of the insulated conductor,
The said 2nd edge part bites into the said 2nd main surface of a different part from the said 1st edge part, and peels off the said insulating film which coat | covers the said 2nd main surface. Insulating film peeling device. It is a method for peeling an insulating film, in which the insulating film is partially peeled off from an insulated conductor whose surface is covered with an insulating film,
A first step of fixing the position of the insulated conductor by causing a first edge portion to bite into the insulated conductor;
A second step of causing the second edge portion to bite into the insulated conductor at a position different from the first edge portion and less than the first edge portion;
The second edge is moved by moving the first edge portion or the second edge portion in the length direction of the insulated conductor while the insulated conductor is fixed at the first edge portion. A third step of peeling the insulating film at the part;
An insulating film peeling method comprising: A first step of preparing a flat conductive wire whose surface is covered with an insulating film, and comprising a coil portion curved in a cylindrical shape and a terminal portion continuous with the coil portion;
A second step of fixing the position of the terminal portion by biting the first edge portion into the terminal portion;
A third step of causing the second edge portion to bite into the terminal portion at a position different from the first edge portion less than the first edge portion;
The second edge is moved by moving the first edge portion or the second edge portion in the length direction of the terminal portion while the terminal portion is fixed at the first edge portion. A fourth step of peeling the insulating film at the part;
A method for producing a coil, comprising:

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