JP2009094131A - Coil winding method and coil winding body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily form a bobbinless coil by winding a wire rod, and to surely secure isolation of the wound coil. <P>SOLUTION: A winding start portion of a coil stack 108 is led out through a second guide groove 126 along the lower surface of a plate component 124 of a lower plate 104 made of a resin material, and a winding end portion of the coil stack 108 is led out along the upper surface 104a of the plate component 124 of the lower plate 104 to cross the winding start portion such that the winding start portion and winding end portion are not in contact with each other through the plate component 124 of the resin-made lower plate 104 interposed therebetween. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a winding method of a coil (solenoid) incorporated in an electromagnetic device such as an electromagnetic valve or an electromagnetic actuator, and a coil winding body formed by the winding method.

  2. Description of the Related Art Conventionally, for example, electromagnetic devices such as an electromagnetic valve that actuates a valve body by attracting a movable core to a fixed core side by exciting a coil winding body constituting a solenoid to generate an electromagnetic force are known. . In this electromagnetic device, in order to ensure electrical insulation (isolation), for example, the outer surface of the coil winding body is coated with a resin material by molding or the like.

  Therefore, as disclosed in Patent Document 1, the present applicant has integrated a synthetic resin coil cover (coil covering) on the outer peripheral surface excluding the inner peripheral surface of the cylindrical bobbinless coil and both end surfaces in the axial direction. A bobbin-less coil assembly manufacturing method for manufacturing a bobbin-less assembly by mechanically molding is proposed.

In this bobbinless coil assembly manufacturing method, in the bobbinless coil preparation process, a bobbinless coil is formed by winding a conducting wire having a circular cross section into a cylindrical shape. Used a conventional winding method.
Japanese Patent Laying-Open No. 2007-67090 (paragraph 0035, FIG. 3)

  The present invention has been made in connection with the above proposal, and can easily form a bobbinless coil by winding a wire, and can reliably ensure the isolation of the wound coil. An object is to provide a possible coil winding method and a coil winding body.

  In order to achieve the above object, according to the present invention, an upper jig to which an upper plate is attached and a lower jig to which a lower plate is attached are connected coaxially, and the upper jig and the lower jig are connected to each other. A coil winding method for forming a coil laminated body by winding a wire rod fed from a nozzle around a claw portion provided between the upper and lower plates while being rotatably supported integrally in a predetermined direction It is.

  According to the present invention, first, the winding start portion of the wire is wound around the first fastening portion of the lower plate, and then drawn out along the guide groove formed on the lower surface of the lower plate. Subsequently, the wire rod is exposed from the lower surface to the upper surface of the lower plate and pulled out from the outer peripheral portion to the inner peripheral portion of the lower plate, and then the wire rod is wound along the peripheral surface of the claw portion. Form. Further, after the wire is drawn from the inner periphery to the outer periphery along the upper surface of the lower plate, the winding end portion of the wire is wound around the second winding portion of the lower plate. In this case, the winding start portion of the wire wound around the first winding portion and the winding end portion of the wire wound around the second winding portion intersect at the upper and lower surfaces of the lower plate. It arrange | positions and is provided in a non-contact state by interposing the said lower plate.

  As described above, in the present invention, the upper and lower plates arranged at a predetermined interval are held by the upper jig and the lower jig, respectively, and the wire is wound around the circumferential surface of the claw portion provided between the upper and lower plates. A bobbinless coil can be formed.

  Further, in the present invention, it is possible to suitably maintain the isolation property of the coil laminate aligned between the upper and lower plates, and to isolate the winding start portion and the winding end portion of the coil laminate exposed to the outside. Can be ensured.

  That is, in the present invention, the winding start portion of the coil laminate is pulled out along the lower surface of the lower plate via the guide groove, and the winding end portion of the coil laminate is pulled out along the upper surface of the lower plate, The winding start portion of the wire wound around the first winding portion and the winding end portion of the wire wound around the second winding portion are arranged in an intersecting manner on the upper and lower surfaces of the lower plate. . As a result, in the present invention, a lower plate made of an electrically insulating material such as a resin material is interposed between the winding start portion and the winding end portion, and the upper and lower surfaces thereof intersect with each other. By disposing them in a non-contact state, it is possible to reliably maintain isolation.

  Furthermore, in the present invention, a plurality of convex portions are provided on the outer peripheral portion of the upper and lower plates so as to be non-overlapping along the vertical direction and project outward in the radial direction, and the winding end portion of the wire is A coil composed of a bobbin-less coil by winding it around the second winding part of the lower plate and then winding the convex part of the upper plate and the convex part of the lower plate alternately and along the circumferential direction by a binding line. A laminated body can be suitably hold | maintained along an up-down direction.

  Furthermore, in the present invention, the claw portion is constituted by a plurality of divided claws, and at least one divided claw is formed with a groove portion that guides the wire material along the circumferential direction. The winding accuracy of the coil laminated body can be improved by being aligned along the groove.

  Furthermore, the present invention according to the coil winding body is sandwiched between an upper plate and a lower plate respectively formed of a resin material, and the upper plate and the lower plate, and a wire rod is wound to form a plurality of stages. A coil stack having coils stacked on each other, and a binding line for holding the upper plate and the lower plate by alternately winding the convex portions of the upper plate and the lower plate arranged in a staggered pattern. It is characterized by that.

  According to the present invention relating to the coil winding body, the convex portions of the upper plate and the convex portions of the lower plate on which the binding line is entangled are non-superimposed along the vertical direction and alternately alternate along the circumferential direction. Therefore, it is possible to suitably prevent the displacement of the upper and lower plates with respect to the rotation direction.

Moreover, it is good to arrange | position the binding line entangled between upper and lower plates so that it may extend substantially in parallel with the axial direction of a coil laminated body. In this case, for example, when the outer surface of the coil winding body is molded with molten resin in the next step, the filling direction of the molten resin injected from the gate of the mold is set to be substantially parallel to the axial direction. Thus, an excessive load is not applied to the binding wire by the molten resin, and a good resin molded body can be obtained while maintaining the state where the coil laminate is held by the binding wire. .
Furthermore, by tying the tie wire so as to circulate along the side peripheral surface of the coil laminate, for example, a uniform holding force can be generated along the circumferential direction. The coil laminate composed of bobbinless can be suitably held by force.

  A bobbinless coil can be easily formed by winding a wire, and a coil winding method and a coil winding body capable of reliably ensuring the isolation of the wound coil can be obtained. .

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a schematic perspective view of a coil winding apparatus for performing a coil winding method according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the coil winding apparatus with a part omitted. 3 is an enlarged perspective view of a coil winding body in which a wire is wound by the coil winding apparatus.

  First, the coil winding body according to this embodiment, which is a finished product in which a wire is wound by the coil winding apparatus shown in FIGS. 1 and 2, will be described. In the winding stage of the wire described later, the axial direction is the row direction of the wire, and the radial direction is the step direction.

  As shown in FIG. 3, the coil winding body 100 includes an upper plate 102 (hereinafter referred to as an upper surface 102 a and a lower surface 102 b) and a lower plate 104 (hereinafter referred to as a lower plate) formed of a resin material. A coil laminated body having a coil sandwiched between the upper plate 102 and the lower plate 104 and wound with a wire (conductive wire) 106 and laminated in a plurality of stages. 108 and the arc-shaped convex portions 114a and 114b of the upper plate 102 and the lower plate 104 that are arranged in a staggered manner in a non-overlapping manner along the vertical direction are alternately entangled to form the upper plate 102 and the lower plate 104. The tie wire 116 to hold | maintain is provided. The coil inner peripheral surface 120 of the coil laminate 108 is not provided with any core material such as a coil bobbin, and is exposed to the outside.

  A first guide groove that guides the tangling wire 116 when the tangling wire 116 is entangled with the arc-shaped convex portions 114a and 114b protruding radially outward from the outer peripheral portions of the upper plate 102 and the lower plate 104. 122 is formed (see FIG. 5). As shown in FIG. 4, the bottom surface of the inner wall of the first guide groove 122 is formed by a curved surface 123 having a slightly raised central portion as viewed in a longitudinal section. 114a and 114b are easily entangled and kept at an appropriate tension.

  The arcuate convex portions 114a and 114b are provided at five places on the upper plate 102 (see FIG. 3) and at six places on the lower plate 104 (see FIG. 5). Further, the first guide groove 122 formed in the arc-shaped convex portion 114a of the upper plate 102 is provided so as to open upward, while the first guide groove 122 formed in the arc-shaped convex portion 114b of the lower plate 104 is provided. They are provided so as to open downward, and are each configured to suitably hold the binding line 116.

  The lower plate 104 protrudes outward in the radial direction and has a first winding portion 110a having a substantially L-shaped cross section around which a winding start portion of the wire 106 is fastened, and a winding end portion of the wire 106 is fastened. And a second winding portion 110b having a substantially L-shaped cross section. In the next process, a pair of terminal terminals (not shown) are crimped to the first winding portion 110a and the second winding portion 110b, respectively, and a winding start portion and a winding end portion of the wire 106 are respectively Electrically connected.

  A rectangular flat plate portion 124 is integrally formed between the outer peripheral surface of the lower plate 104 and the first and second winding portions 110a and 110b. As shown in FIG. 5, on the flat plate portion 124 of the lower surface 104b of the lower plate 104, a winding start portion of the wire 106 wound around the first winding portion 110a is lowered from the first winding portion 110a. A bent second guide groove 126 that is guided toward the outer periphery of the plate 104 is formed.

  Furthermore, a cylindrical protrusion 128 that slightly bulges in the axial direction (the upper surface 104a and the lower surface 104b of the lower plate 104) is formed on the inner peripheral portion of the lower plate 104. As shown in FIGS. 2 and 6, the upper surface 104 a of the lower plate 104 is a groove having a concave cross section extending in a tangential direction with respect to the annular protrusion 128, and a winding start portion of the wire 106 is formed on the upper surface 104 a. A guide slope 130 is formed to guide from the outer peripheral portion of the lower plate 104 toward the inner peripheral portion. As shown in FIGS. 6 and 8, the guide slope 130 is formed to have an inclined surface (groove bottom) inclined at a predetermined angle that is shallow on the inner peripheral side and gradually deeper toward the outer peripheral side.

  As shown in FIG. 6, one side wall 132 of the guide slope 130 substantially orthogonal to the inclined surface is spaced apart by a predetermined distance and bulges laterally toward the inclined surface, for example, two ribs 134. Is formed. The rib 134 comes into contact with the wire 106 to be guided in the guide slope 130, so that, for example, when molding in the next process, the molten resin moves along the wire 106 in the guide slope 130. Filling is prevented, and as a result, it is possible to suitably prevent the molten resin from entering the coil inner peripheral surface 120. Note that the number of ribs 34 is not limited to a plurality, and one or more ribs 34 may be used.

  Furthermore, as shown in FIG. 5, the arc-shaped convex portion 114 b of the lower plate 104 is formed with a notch portion 136 that locks the starting portion of the binding line 106, and other arc-shaped convex portions. 114b is formed with another notch 136 that locks the end portion of the binding line 106.

  As shown in FIG. 9, a third guide groove 138 is formed on the lower surface 102b of the upper plate 102 facing the lower plate 104. The third guide groove 138 is formed by connecting a plurality of grooves having an arcuate longitudinal section. The guide groove 138 exhibits a function of guiding and aligning the wire 106 when the wire 106 is stacked in a plurality of stages and folded.

  Next, based on FIG.1 and FIG.2, the coil winding apparatus 10 which implements the coil winding method which concerns on this embodiment is demonstrated roughly.

  This coil winding device 10 is arranged along an arrow direction on an upper jig 12 provided so as to be movable up and down along a vertical direction via a lifting mechanism (not shown) and on a base (not shown) under the rotational driving action of the motor M. And a lower jig 14 rotatably supported.

  The upper jig 12 is inserted into a plate holding portion for attaching the upper plate 102 to lock the upper plate 102, and a claw portion 16 to be described later of the lower jig 14, and the claw portion 16 (divided claw). And a tapered insertion portion 18 (see FIG. 2) for expanding the diameter.

  The lower jig 14 is supported by a jig body 20 having a substantially cylindrical shape, a pedestal 22 provided on the upper part of the jig body 20, and displaceable along the radial direction with respect to the pedestal 22. Further, the claw portion 16 having first to third divided claws 16a to 16c (see FIG. 2) that expands in the radial outward direction by inserting the insertion portion 18 of the upper jig 12, and the jig And a set of locking portions 24 that protrude in a direction orthogonal to the axis of the tool main body portion 20 and lock one end of the wire rod 106 and the winding wire 106 at the start of winding.

  As shown in FIG. 1, when the upper jig 12 and the lower jig 12 are assembled coaxially, a wire 106 is wound between the upper plate 102 and the lower plate 104 which are separated by a predetermined distance. It is provided so that the peripheral surface of the nail | claw part 16 which functions as a wound gland part to rotate is exposed. The circumferential surface of the claw portion 16 is configured by arranging the circumferential surfaces of the first to third divided claws 16a to 16c apart from each other by a predetermined angle along the circumferential direction.

  On the peripheral surfaces of the first and second divided claws 16a and 16b, a plurality of groove portions 26 are formed that extend in parallel along the horizontal direction and guide the wire 106 wound around the peripheral surface. Further, the peripheral surface of the third divided claw 16c is composed of a smooth surface 28 on which no uneven shape is formed. The smooth surface 28 smoothly performs transfer to the next row when the wire 106 is wound along the peripheral surface.

  Further, the coil winding device 10 includes a nozzle 30 that feeds the wire 106 to the peripheral surface of the claw portion 16, and a triaxial actuator 32 that displaces the nozzle 30 in three XYZ directions orthogonal to each other. And a tensioner 34 for applying an appropriate tension to the wire 106 fed from the nozzle 30.

  The coil winding apparatus 10 that performs the coil winding method according to the present embodiment is basically configured as described above, and the coil winding method will be described in detail together with the operation of the coil winding apparatus 10. To do.

  As shown in FIG. 2, in the state where the upper jig 12 with the upper plate 102 attached and the lower jig 14 with the lower plate 104 attached are coaxially separated, the upper jig is connected via an unillustrated lifting mechanism. The tool 12 is lowered toward the lower jig 14. In this case, the insertion portion 18 of the upper jig 12 is inserted into the claw portion 16 to press the first to third divided claws 16a to 16c outward in the radial direction, and the first to third divided claws 16a to 16c are By sliding outward in the radial direction, the assembly of the upper jig 12 and the lower jig 14 is completed. When the assembly of the upper and lower jigs 12 and 14 is completed, the upper and lower plates 102 and 104 are held at a predetermined interval, and preparation for winding the wire 106 around the circumferential surface (winding portion) of the claw portion 16 is completed. To do.

  Next, a method for winding the wire 106 between the upper and lower plates 102 and 104 held by the upper and lower jigs 12 and 14 will be described.

  First, in a state where the motor M is in the deenergized state and the upper and lower jigs 12 and 14 are stationary, the nozzle 30 is displaced under the driving action of the triaxial actuator 32, and the wire 106 fed from the nozzle 30 is wound. After the first end portion is locked to the locking portion 24 of the jig main body portion 20, as shown in FIG. 7A, the first winding portion 110a provided on the left side of the lower plate 104 is arranged. One turn of the outer peripheral surface is performed clockwise from the lower side (see arrows a1 and a2). In addition, since moderate tension | tensile_strength is provided to the wire 106 delivered from the nozzle 30 by the tensioner 34, it can prevent suitably that the wound wire 106 is frayed.

  Subsequently, the nozzle 30 is displaced in the lateral direction under the driving action of the triaxial actuator 32, and along the second guide groove 126 formed on the lower surface of the second winding portion 110 b on the right side toward the lower plate 104. After inserting the wire 106 (see the partial perspective view of FIG. 7A), the wire 106 is guided along the guide slope 130 formed on the upper surface 104a of the lower plate 104, as indicated by an arrow a3. The wire 106 is led out from the outer peripheral portion of the lower plate 104 toward the inner peripheral portion.

  When the wire 106 is guided along the inclined surface of the guide slope 130 and reaches the smooth surface 28 (lowermost part) of the third split claw 16c, the motor M is energized to move the upper and lower jigs 12 and 14 in the direction of the arrow. Is integrally guided along the groove 26 of the first and second divided claws 16a and 16b, and reaches the smooth surface 28 of the third divided claw 16 again (see FIG. 8). At that time, since the peripheral surface of the third divided claw 16c is formed by the smooth surface 28 and does not restrict the winding direction of the wire 106, the wire 106 can be smoothly transferred to the next row. .

  Further, the nozzle 30 is displaced upward, and the wire 106 is wound in a plurality along the row direction (axial direction) of the peripheral surfaces of the first to third divided claws 16a, 16b, and 16c as indicated by an arrow a4. While being rotated (see FIG. 7B), the nozzle 30 reciprocates along the axial direction, whereby the wire 106 is sequentially laminated along the radial direction of the peripheral surface of the claw portion 16 (FIG. 7). (See (c)).

  The upper and lower jigs 12 and 14 rotate integrally, and the wire 30 is fed while the nozzle 30 reciprocates between the lower plate 104 and the upper plate 102 a plurality of times to form a coil stack 108 having a plurality of stages. After that, in a state where the rotation of the upper and lower jigs 12 and 14 is stopped, the winding end portion of the wire 106 is set to the inner periphery of the upper surface 104a of the lower plate 104 as indicated by arrows a5 to a7 in FIG. Then, after winding the outer peripheral surface of the right second fastening portion 110b in the clockwise direction from the upper side, the winding end portion of the wire rod 106 is cut by a cutter means (not shown).

  Thus, the upper jig 12 and the lower jig 14 are assembled coaxially, and the upper plate 102 and the lower plate 104 are spaced apart from the claw portion 16 by a predetermined distance, and the upper jig 12 and the lower jig 14 are set to a predetermined width. Between the plate 102 and the lower plate 104, the coil stack 108 in which the wire 106 is wound and aligned in the axial direction can be obtained. Moreover, the winding start portion and the winding end portion of the coil laminate 108 exposed to the outside are respectively wound around the adjacent first winding portion 110a and second winding portion 110b, and the flat plate portion of the lower plate 104 By separating them on the upper and lower surfaces of 124 and arranging them in a cross shape (cross), it is possible to ensure isolation of the coil laminate 108 including the winding start portion and the winding end portion.

  Next, a method of binding the binding wire 106 that holds the coil laminate 108 made of a bobbinless coil along the vertical direction will be described with reference to FIG. The point at which one end of the binding wire 106 at the beginning of the binding is locked to the locking portion 24 is the same as the case where the coil laminate 108 is formed by winding the wire 106, and the description thereof will be given. Omitted. Further, as the binding wire 106, the following description is given using the wire material 106 (conductive wire) fed from the nozzle 30, but is not limited thereto, and other wire material other than the conductive wire is used. Also good.

  As shown by the arrows c1 to c3, after winding the binding start portion of the binding line 106 around the outer peripheral surface of the arc-shaped convex portion 114b of the lower plate 104 in the clockwise direction from below, Is engaged with the first guide groove 122 (see FIG. 4) of the arc-shaped convex portion 114a of the upper plate. At this time, the arc-shaped convex portion 114b of the lower plate 104 is formed with a notch 136 that locks the tangling start portion of the tying wire 106. Therefore, the tying wire 106 is formed by the notch 136. The entanglement starting portion is smoothly locked.

  Subsequently, in a state where the upper and lower jigs 12 and 14 are integrally rotated along the circumferential direction under the driving action of the motor M, the nozzle 30 is reciprocated in the vertical direction, as indicated by arrows c4 to c17. The first guide grooves 122 of the arc-shaped convex portions 114b of the lower plate 104 and the first guides of the arc-shaped convex portions 114a of the upper plate 102 that are non-overlapping along the vertical direction and are alternately arranged along the circumferential direction. The binding line 106 is sequentially bound along the groove 122. The motor M is controlled by a controller (not shown), and the tension of the tangled wire 106 tangled along the arc-shaped convex portions 114a and 114b of the upper and lower plates 102 and 104 is appropriately controlled by normal rotation and reverse rotation. Set moderately.

  In this case, the arc-shaped convex portions 114a of the upper plate 102 and the arc-shaped convex portions 114b of the lower plate 104, which are the engaging portions of the binding line 106, are alternately arranged in a staggered manner along the circumferential direction. Therefore, it is possible to suitably prevent displacement of the upper and lower plates 102 and 104 with respect to the rotation direction.

  Further, a binding line 106 entangled between the upper and lower plates 102 and 104 extends substantially in parallel with the axial direction of the coil laminate 108. For this reason, for example, when the outer surface of the coil winding body 100 is molded with molten resin in the next step, the filling direction of the molten resin injected from the gate of the mold (not shown) is set to be parallel to the axial direction. By doing so, an excessive load is not applied to the binding wire 106 by the molten resin, and a good resin molded body is maintained while the coil laminate 108 is held by the binding wire 106. (Not shown) can be obtained.

  Arc-shaped convex portions 114a and 114b of the upper and lower plates 102 and 104 are alternately wound along the vertical direction by the binding line 106, and the binding line 106 is drawn along the circumferential direction of the upper and lower plates 102 and 104. As shown in c18 to c20, after winding the outer peripheral surface of the other arc-shaped convex portion 114b of the lower plate 104 in the clockwise direction, the end portion of the binding line 106 is cut by a cutter means (not shown). . At this time, the other arc-shaped convex portion 114b of the lower plate 104 is formed with a notch 136 that locks the end portion of the binding line 106. The end portion of the line 106 is smoothly locked.

  In this way, after the coil winding body 100 in which the binding wire 106 is entangled on the outer peripheral surfaces of the upper and lower plates 102 and 104 is configured, the upper jig 12 is moved to the lower jig 14 via a lifting mechanism (not shown). As a result, the coil winding body 100 is taken out and conveyed to the next step.

  In the present embodiment, the upper and lower plates 102, 104 arranged at a predetermined interval are held by the upper and lower jigs 12, 14, and the wire 106 is wound around the peripheral surface of the claw portion 16 provided on the lower jig 104. A bobbinless coil can be easily formed.

  Further, in the present embodiment, the coil laminate 108 aligned between the upper and lower plates 102 and 104 can be preferably kept in isolation, and the coil laminate 108 exposed to the outside starts to be wound. When the portion and the winding end portion are wound around the first winding portion 110a and the second winding portion 110b that are separated in the left-right direction, respectively, and are separated into the upper and lower surfaces of the flat plate portion 124 and pulled out in a crossing manner. The isolation property of the coil laminate 108 can be reliably ensured.

  In other words, in this embodiment, the winding start portion of the coil laminate 108 is pulled out along the lower surface of the flat plate portion 124 of the resin lower plate 104 via the second guide groove 126, and the coil laminate 108. The winding end portion is drawn out along the upper surface of the flat plate portion 124 of the lower plate 104 so as to intersect the winding start portion, and the flat plate portion 124 formed of a resin material between the winding start portion and the winding end portion. By interposing it in a non-contact state, it is possible to reliably maintain isolation.

It is a schematic structure perspective view of the coil winding apparatus which enforces the coil winding method concerning the embodiment of the present invention. It is a partially omitted exploded perspective view of the coil winding device. It is an expansion perspective view of the coil winding body concerning the embodiment of the present invention. FIG. 4 is a longitudinal sectional view taken along line IV-IV in FIG. 3. It is a bottom view which shows the lower surface of a lower plate. It is a partial expansion perspective view which shows the guide slope provided in the upper surface of the lower plate. (A)-(c) is a partially-omission perspective view which shows the order of the winding method which winds a wire around the nail | claw part provided between the upper and lower plates, respectively. The peripheral surface of the 1st-3rd division | segmentation nail | claw which comprises the said nail | claw part is represented on a plane for convenience, and it is a partially notched side view which shows the state by which a wire is wound around the said 1st-3rd division | segmentation claw. is there. It is a fragmentary longitudinal cross-section which shows the state by which a wire is folded and laminated | stacked. It is the perspective view which showed the state where the circular-arc-shaped convex parts each formed in the outer peripheral part of an up-and-down plate were entangled with a tangling line in time series.

Explanation of symbols

12 Upper jig 14 Lower jig 16 Claw part 26 Groove part 30 Nozzle 100 Coil winding body 102 Upper plate 104 Lower plate 106 Wire rod, tie wire 110a, 110b Winding part 114a, 114b Arc-shaped convex part 126 Guide groove

Claims (4)

An upper jig on which the upper plate is mounted and a lower jig on which the lower plate is mounted are connected coaxially, and the upper jig and the lower jig are integrally supported in a predetermined direction so as to be freely rotatable. A coil winding method for forming a coil laminate by winding a wire fed from a nozzle around a claw portion provided between the upper and lower plates,
After the winding start portion of the wire rod is wound around the first winding portion of the lower plate, a step of drawing along the guide groove formed on the lower surface of the lower plate;
The wire rod is exposed from the lower surface to the upper surface of the lower plate and pulled out from the outer peripheral portion of the lower plate to the inner peripheral portion, and then the wire rod is wound along the peripheral surface of the claw portion to form a coil laminate. Process,
After drawing the wire rod from the inner periphery to the outer periphery along the upper surface of the lower plate, winding the winding end portion of the wire to the second winding portion of the lower plate;
Have
The winding start portion of the wire rod wound around the first winding portion and the winding end portion of the wire rod wound around the second winding portion are arranged in an intersecting manner on the upper and lower surfaces of the lower plate. Coil winding method characterized by the above. The coil winding method according to claim 1,
The outer periphery of the upper plate is provided with a plurality of protrusions protruding outward in the radial direction, and the outer periphery of the lower plate is provided with a plurality of protrusions protruding outward in the radius direction, The convex portions of the upper and lower plates are arranged in a non-overlapping manner along the vertical direction,
After the winding end portion of the wire is wound around the second winding portion of the lower plate, the convex portions of the upper plate and the convex portions of the lower plate are alternately tangled along the circumferential direction by a binding line. Coil winding method characterized by the above. In the coil winding method according to claim 1 or 2,
The coil winding method, wherein the claw portion includes a plurality of divided claws, and at least one divided claw is provided with a groove portion for guiding the wire along the circumferential direction. An upper plate and a lower plate respectively formed of a resin material;
A coil laminate having a coil sandwiched between the upper plate and the lower plate, wound with a wire and laminated in a plurality of stages;
A tie wire that holds the upper plate and the lower plate by alternately tangling the convex portions of the upper plate and the lower plate arranged in a staggered pattern,
A coil winding body comprising:

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