Method for forming a coil and a device for forming the coil

Abstract

Method for forming a coil (10) which is formed by repeatedly winding a flat rectangular conductor wire (11), wherein the method comprises: a step for bending a coil end region (13) of the coil (10) such that an outer form (20) having a plurality of arcuate lamellae (22) arranged to form gaps (21) between them along a direction in which regions of the flat rectangular conductor wire (11) of the coil (10) are stacked, and subdivided to correspond to one side and the other side of a pair of slotted regions (12) of the coils (10), is moved relative to the coil (10) to insert the coil end region (13) of the coil (10) into the gaps (21) between the lamellae (22) of the outer form (20), the coil end region (13) being bent according to a shape of the lamellae (22); and a step to form an offset region (14) in the coil end region (13) which is bent in a stacking direction (A) of the flat rectangular conductor wire (11), with an offset in the stacking direction (A) of the flat rectangular conductor wire (11) by an amount corresponding to a width (W) of the single flat rectangular conductor wire (11) by moving the outer shape (201) on one side in the subdivided outer shape (20) relative to the outer shape (202) on the other side in the direction along the stacking direction (A).

Description

TECHNICAL AREA

[0001] The present invention relates to a method for forming or shaping a coil and a device for forming or shaping a coil. TECHNICAL BACKGROUND

[0002] To date, a coil-forming method and a coil-forming device for forming a coil end region of a coil are known. The coil-forming method and the coil-forming region are disclosed, for example, in WO 2014 / 157218A1 and JP 2004-297863A.

[0003] WO 2014 / 157 218 A1 discloses a coil-forming method for forming coil end regions of a concentric winding coil formed by multiple windings of a flat rectangular conductor wire. This coil-forming method uses lamellar dies or molds, each having a plurality of lamellae, and the lamellae are arranged such that they have gaps or spaces between them in the stacking direction of stacked regions of the flat rectangular conductor wire of the concentric winding coil. The flat rectangular conductor wire forming the coil end regions is arranged in the gaps between the lamellae of the lamellar die. The lamellar dies are moved relative to the concentric winding coil so that they approach the concentric winding coil.The coil end areas of the concentric winding coil are therefore deformed (formed) according to the shape of the lamellae.

[0004] Specifically, each lamination is formed into a circular arc shape corresponding to the arc of the annular stator core on which the concentric winding coil is mounted. The circular arc laminations are subdivided to correspond to one side and the other side of a pair of slotted sections of the concentric winding coil, which are to be accommodated in the slots. The vertical positions of the laminations on one side, in the multiple subdivided laminations, are offset from each other in the stacking direction of the flat conductor wire, as are the vertical positions of the laminations on the other side, in the stacking direction of the flat rectangular conductor wire.

[0005] By moving the lamellar dies relative to the concentric winding coil, the coil end regions of the concentric winding coil are curved into a circular arc shape according to the shape of the circular arc lamellae. The coil end regions are further pressed against the segmented lamellae, which have different height positions (pressures are applied to the coil end regions upwards and downwards in the stacking direction of the flat rectangular conductor wire), during a relative movement (sliding movement) of the lamellar dies in the directions in which the lamellar dies approach the concentric winding coil.Consequently, offset regions, each bent in the stacking direction of the flat rectangular lead wire (a direction essentially perpendicular to the direction in which the concentric winding coil moves relative to the other), are formed in the coil end regions of the concentric winding coil with an offset (displacement) in the stacking direction by an amount corresponding to a predetermined width. In this way, the bending of the coil end regions of the concentric winding coil and the formation of the offset regions are performed in a single step. Therefore, in a case where multiple sets of forming dies are used, adapted to the forming directions of the concentric winding coil (as, for example, in JP 2004-297863A), it is necessary that the concentric winding coil be positioned precisely with respect to each set of forming dies.However, in the process described in WO 2014 / 157 218 A1), the bending of the coil end regions and the formation of the offset regions can be carried out in a state where the concentric winding coil is attached to the lamellar dies. Consequently, it is possible to reduce or facilitate the process of attaching the coil to the forming dies.

[0006] JP 2013 - 183 534 A, US 2015 / 0 013 149 A1 and DE 11 2013 004 716 T5 disclose further methods and devices for forming or shaping a coil. SUMMARY OF THE INVENTION The problem to be solved by the invention

[0007] In the coil-forming process described in WO 2014 / 157 218 A1, the offset sections are bent in the stacking direction of the flat rectangular conductor wire, which is essentially perpendicular to the direction in which the concentric winding coil moves relatively, with an offset in the stacking direction, while the lamellar forms move (slide) in the directions in which they approach the concentric winding coil. Consequently, when the offset sections are formed, forces are applied to the concentric winding coil (flat rectangular conductor wire) in a direction along the stacking direction of the flat rectangular conductor wire, in addition to the relative direction of movement (slide) of the concentric winding coil. As a result, the insulating film of the concentric winding coil (flat rectangular conductor wire) may be damaged.

[0008] The present invention was developed to solve the above-mentioned problem, and it is an object of the present invention to provide a method for forming a coil and a device for forming a coil, wherein, when a coil is formed (when an offset area is formed), damage to an insulating film of the coil (the flat rectangular conductor wire) can be prevented, while a positioning process of the coil with respect to a shape can be reduced or simplified. Means to solve the problem

[0009] To solve the above problem, a method for forming a coil according to a first aspect of the present invention is a method for forming a coil by repeatedly winding a flat rectangular conductor wire. The method includes a step for bending a coil end region such that an outer die or shape, having a plurality of arcuate lamellae arranged such that gaps (spaces) exist between them along a direction in which regions of the flat rectangular conductor wire of the coil are stacked, and subdivided to correspond to one and the other side of the pair of slotted regions of the coil, is moved relative to the coil to insert the coil end region into the gaps between the lamellae of the outer shape, bending the coil end region according to a shape of the lamellae.and a step to form an offset region in the coil end region which is bent in a stacking direction of the flat rectangular conductor wire, with a displacement in the stacking direction of the flat rectangular conductor wire by an amount corresponding to the width of a single flat rectangular conductor wire by moving the outer shape on one side in the subdivided outer shape relative to the outer shape on the other side in a direction along the stacking direction.

[0010] As described above, the method for forming a coil according to the first aspect of the present invention comprises the step of forming the offset region in the coil end region. This offset region is bent in the stacking direction of the flat rectangular conductor wire by an offset in the stacking direction of the flat rectangular conductor wire by an amount corresponding to the width of the individual flat rectangular conductor wire. This is achieved by moving the outer form on one side of the subdivided outer form relative to the outer form on the other side in a direction along the stacking direction. Consequently, in the step of forming the offset region, a force is applied to the coil end region only in the direction along the stacking direction of the flat rectangular conductor wire.Damage to the insulating film of the coil (flat rectangular conductor wire) can therefore be prevented, in contrast to the case where forces are applied in the direction along the stacking direction of the flat rectangular conductor wire and additionally in the relative direction of movement (sliding direction) of the coil, i.e. in the case where the offset area is formed in the coil end area, while the outer shape is moved (slides) relatively in the direction in which the outer shape approaches the coil.

[0011] In contrast to the case where the coil is precisely positioned relative to each set of forming dies (forming dies or simply dies) adapted to the coil's forming directions, the bending of the coil end region and the formation of the offset region can be performed while the coil is attached to the outer form. Consequently, the process of precisely positioning the coil relative to the form (outer form) is simplified. As a result of the coil's formation (when the offset region is formed), the coil's insulating film (the flat rectangular conductor wire) can be protected from damage, while the process of positioning the coil relative to the form (outer form) is reduced or simplified.

[0012] A device for forming a coil according to a second aspect of the present invention is a device for forming a coil, configured for forming a coil by multiple windings of a flat rectangular conductor wire. The device comprises an outer shape having a plurality of arcuate lamellae arranged such that gaps are provided between them along a direction in which sections of the flat rectangular conductor wire of the coil are stacked, and which are subdivided to correspond to one side and the other side of a pair of slotted sections of the coil; a first movement mechanism unit configured to move the outer shape relative to the coil such that a coil end section of the coil is inserted into the gaps between the lamellae of the outer shape and curved according to a shape of the lamellae; and a second movement mechanism unit.which is configured to move the outer shape on one side in the split outer shape relative to the outer shape on the other side in a direction along a stacking direction of the flat rectangular lead wire, such that an offset area, bent in the stacking direction of the flat rectangular lead wire, is formed in the coil end area with an offset in the stacking direction by an amount equal to a width of the single flat rectangular lead wire.

[0013] As described above, the device for forming a coil according to the second aspect of the present invention comprises the second movement mechanism unit, which is configured to move the outer form on one side of the subdivided outer form relative to the outer form on the other side in the direction of the stacking direction of the flat rectangular conductor wire, such that the offset region, which is bent in the stacking direction of the flat rectangular conductor wire with an offset in the stacking direction by an amount corresponding to the width of the individual flat rectangular conductor wire, is formed in the coil end region. In the step of forming the offset region, a force is therefore applied to the coil end region only in the direction of the stacking direction of the flat rectangular conductor wire.Consequently, it is possible to create a device for forming a coil in which damage to the insulating film of the coil (the flat rectangular conductor wire) can be prevented, in contrast to the case in which forces are applied in the direction along the stacking direction of the flat rectangular conductor wire and additionally in the relative direction of movement (sliding direction) of the coil, i.e., in the case in which the offset area is formed in the coil end area, while the outer shape moves (slides) relatively in the direction in which the outer shape approaches the coil.

[0014] In contrast to the case where the coil is precisely positioned relative to each set of forming shapes adapted to the coil's forming directions, the bending of the coil end region and the formation of the offset region can be performed while the coil is attached to the outer shape. Consequently, it is possible to reduce or simplify the process of precisely positioning the coil relative to the shape (outer form). As a result, it is possible to create a device for forming a coil where, during coil formation (when the offset region is formed), damage to the coil's insulating film (the flat rectangular conductor wire) is prevented, while the process of positioning the coil relative to the shape (outer form) is reduced or simplified. Effects of the invention

[0015] According to the present invention, as described above, when the coil is formed (when the offset areas are formed), damage to the insulating film of the coil (the flat rectangular conductor wire) can be prevented, while simplifying the process of positioning the coil with respect to its shape. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 shows a perspective view of a concentric winding coil according to an embodiment of the present invention. Fig. Figure 2 shows a front view of a concentric winding coil according to the embodiment of the present invention. Fig. Figure 3 shows a top view of a first coil end region of the concentric winding coil according to the embodiment of the present invention. Fig. Figure 4 shows a bottom view of a second coil end region of the concentric winding coil according to the embodiment of the present invention. Fig. Figure 5 shows a perspective view of a device for forming the concentric winding coil according to an embodiment of the present invention. Fig. Figure 6 shows a top view of the device for forming the concentric winding coil according to the embodiment of the present invention. Fig. Figure 7 shows a front view of lamellae of the device for forming the concentric winding coil according to the embodiment of the present invention. Fig. Figure 8 shows a rear view of the first outer form of the forming device according to the embodiment of the present invention. Fig. Figure 9 shows a rear view of a second outer form of the forming device according to the embodiment of the present invention. Fig. Figure 10 shows a view illustrating a state in which the outer form on one side and an outer form on the other side of the forming device are engaged with each other according to the embodiment of the present invention. Fig. Figure 11 shows a partially enlarged view of Fig. 10. Fig. Figure 12 shows a front view of a first internal form of the formation device according to the embodiment of the present invention. Fig. Figure 13 shows a front view of a second inner form of the forming device according to the embodiment of the present invention. Fig. Figure 14 shows a front view of a concentric winding coil before forming according to the embodiment of the present invention. Fig. Figure 15 shows a top view of a coil end region of the concentric winding coil before forming according to the embodiment of the present invention. Fig. Figure 16 shows a view to describe a curvature step of the coil end region according to the embodiment of the present invention. Fig. Figure 17 shows a view illustrating the curved coil end area of ​​the concentric winding coil. Fig. Figure 18 shows a view to describe a step for forming an offset area (first outer shape) according to the embodiment of the present invention. Fig. Figure 19 shows a view to describe the step for forming the offset area (second outer shape) according to the embodiment of the present invention. Fig. Figure 20 shows a view to describe a step for arranging the inner shapes (withdrawn from the outer shapes) according to the embodiment of the present invention. Fig. Figure 21 shows a view to describe the step for arranging the inner shapes according to the embodiment of the present invention. Fig. Figure 22 shows a view to describe a step for forming protruding areas (movement of the inner shapes) according to the embodiment of the present invention. Fig. Figure 23 shows a view to describe the step for forming the protrusion areas (movement of the outer shapes) according to the embodiment of the present invention. FORMS OF THE PRESENT INVENTION

[0016] An example of the present invention is described below with reference to the drawings. Example of implementation: Construction of the concentric winding coil

[0017] The structure of a concentric winding coil 10 according to this embodiment is described with reference to the Fig. 1, Fig. 2, Fig. 3 to Fig. 4 described. Note that the concentric winding coil 10 is an example of a “coil” according to the claims.

[0018] As in Fig. 1 and Fig. As shown in Figure 2, the concentric winding coil 10 is formed from a flat rectangular conductor wire 11, which has a substantially rectangular cross-section. The flat rectangular conductor wire 11 is made of a metal with high conductivity (for example, copper or aluminum).

[0019] The concentric winding coil is a coil cassette formed by repeatedly winding the flat rectangular conductor wire 11. The concentric winding coil 10 is formed into a predetermined shape (for example, an essentially hexagonal shape) by means of a forming device 100, which will be described later, after a single straight flat rectangular conductor wire 11 has been wound several times through a winding forming device (not shown).

[0020] The concentric winding coil 10 has slotted sections 12 (slotted sections 12a and 12b) and coil end sections 13 (first coil end section 13a and second coil end section 13b). The slotted section 12 has a substantially straight shape and is received in a slot (not shown) of a stator core (not shown). The slotted sections 12a and 12b are received in separate slots spaced apart from each other at a predetermined distance along the circumference of the stator core. The first coil end section 13a and the second coil end section 13b are designed to project outwards from the ends of the stator core along the axis of rotation and to connect the slotted sections 12a and 12b.

[0021] The concentric winding coil is constructed such that sections of the flat rectangular conductor wire 11 are stacked in one direction along the short side of the flat rectangular conductor wire 11 in cross-section. The stacked sections of the flat rectangular conductor wire are spaced at a predetermined distance in the stacking direction A (see Fig. 1) arranged apart from each other. The slotted areas 12 are formed to radiate in one direction from a radially inner side (A1 direction side; see Fig. 1, Fig. 3 and Fig. 4) to a radially outer side (A2 direction side; see Fig. 1, Fig. 3 and Fig. 4) to extend such that the distance between the slotted area 12a and the slotted area 12b changes along the circumferential direction in the stacking direction A. The concentric winding coil 10 can therefore be inserted smoothly and without friction into the slots.

[0022] As in the Fig. 3 and Fig. As shown in Figure 4, the coil end regions 13 (first coil end region 13a and second coil end region 13b) are provided with offset regions 14 (first offset region 14a and second offset region 14b) which are bent in the stacking direction A of the flat rectangular conductor wire 11, with an offset in the stacking direction A by an amount corresponding to a width W of the individual flat rectangular conductor wire 11. As shown in Fig. As shown in Figure 3, the offset directions of the first offset region 14a and the second offset region 14b are opposite to each other. When viewing the concentric winding coil 10 from above, the first offset region 14a is offset from an outer peripheral side of the concentric winding coil 10 by an amount corresponding to the width W of the single flat rectangular conductor wire 11, in a direction from one circumferential side (R1 direction side) to the outer circumferential side (R2 direction side). Similarly, when viewing the concentric winding coil 10 from above, the second offset region 14b is offset from the outer peripheral side of the concentric winding coil 10 by an amount corresponding to the width W of the single flat rectangular conductor wire 11, in a direction from one circumferential side (R2 direction side) to the outer circumferential side (R1 direction side).

[0023] The offset section 14 is curved and rounded (i.e., not bent at a right angle). The offset section 14 has an inclined section 14c, which is inclined with respect to the stacking direction A of the flat rectangular conductor wire 11.

[0024] The coil end region 13 has a first curved region 15a, which is curved into a circular arc shape corresponding to a circular arc of the annular stator core, and a second curved region 15b, which is offset from the first curved region 15a in the stacking direction A by an amount corresponding to the width W of the single flat rectangular conductor wire 11. The first curved region 15a and the second curved region 15b are connected to each other by the offset region 14.

[0025] As in the Fig. 1 and Fig. As shown in Figure 2, the coil end regions 13 (first coil end region 13a and second coil end region 13b) are provided with projection regions 16 (projection region 16a and 16b) that project in the direction in which the slotted region 12 extends (B direction). The offset region 14 is located at the distal end of the projection region 16. The concentric winding coil 10 is provided with shoulder regions (17a and 17b) that connect the first curved region 15a and the slotted region 12, and that connect the second curved region 15b and the slotted region 12.

[0026] The flat rectangular conductor wire 11 is coated with an insulating film (not shown). Construction of the device for forming the concentric winding coil

[0027] Next, the construction of the training device 100 for the concentric winding coil 100 will be described with reference to the Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12 to Fig. 13 described. The forming device 10 for the concentric winding coil 10 is constructed to form the concentric winding coil 10, which is formed by winding the flat rectangular lead wire 11 several times.

[0028] As in the Fig. 5 and Fig. As shown in Figure 6, the forming device 100 for the concentric winding coil 10 has outer forms 20 (punches). The outer form 20 has a plurality of arcuate (circular arc-shaped) lamellae 22. The lamellae 22 are arranged such that gaps 21 are formed between them along direction A, in which the areas of the flat rectangular conductor wire 11 of the concentric winding coil 10 are stacked. The outer form 20 is divided in the F direction into an outer form 201 and an outer form 202 to correspond to one side and the other side of the pair of slotted areas 12 of the concentric winding coil 10. The inner side of the lamella 22 is rounded in the F direction to avoid damaging the concentric winding coil 10.

[0029] Each of the laminations 22 is formed into a circular arc shape corresponding to the circular arc of the annular stator core (not shown) on which the concentric winding coil 10 is arranged. The laminations 22 are provided on the subdivided outer form 20 (outer form 201 and outer form 202). As shown in Fig. As shown in Figure 7, in a state before the coil end regions 13 of the concentric winding coil 10 are formed, a plurality of lamellae 22a of outer shape 201 are arranged on one side of the slotted regions 12 and a plurality of lamellae 22 of outer shape 202 are arranged on the other side of the slotted regions 12 at substantially the same height positions in the stacking direction A of the flat rectangular flat conductor wire 11, when viewed from one side (side where the concentric winding coil 10 is arranged with respect to the outer shape 20) opposite to a direction in which the concentric winding coil 10 is inserted into the outer shape 20 (C1 direction or C2 direction, see Figure 7). Fig. 5) The height positions at which the lamellae 22a are attached to the outer shape 201 (height positions in the stacking direction A of the flat rectangular conductor wire 11) and the height positions at which the lamellae 22b are attached to the outer shape 202 are different from each other. The outer shape 201 and the outer shape 202 are arranged to be displaced or offset from each other along the stacking direction A of the flat rectangular conductor wire 11 (see Fig. 8 and Fig. 9) In this way, the distal ends of the lamellae 22a of the outer shape 201 on one side of the slotted area 12 and the distal ends of the lamellae 22b of the outer shape 202 on the other side of the slotted area 12 are arranged at substantially the same height positions. Furthermore, gaps 21 between the arcuate lamellae 22 have an arcuate shape corresponding to the arcuate lamellae 22.

[0030] As in the Fig. 8 and Fig. As shown in Figure 9, a plurality of arc-shaped openings 24 are provided on a surface 23 of each outer shape 20 (outer shape 201 and outer shape 202) on the rear side (side opposite the side where the concentric winding coil 10 is arranged) to communicate with the gaps 21 between the lamellae 22.

[0031] As in the Fig. 5 and Fig. As shown in Figure 6, the outer shapes 20 have a first outer shape 20a, which is provided on the side of the first coil end region 13a, and a second outer shape 20b, which is provided on the side of the second coil end region 13b. As shown in Fig. As shown in Figure 8, in the first outer form 20a, the outer form 201 is arranged such that the outer form 201 is shifted upwards from the outer form 202. As shown in Fig. As shown in Figure 9, in the second outer form 20b, the outer form 201 is arranged such that the outer form 201 is displaced downwards relative to the outer form 202. Consequently, in both the first outer form 20a and the second outer form 20b, the lamellae 22a of the outer form 201 are located on one side of the slotted areas 12, and the lamellae 22b of the outer form 202 are located on the other side of the slotted areas, essentially at the same height positions.

[0032] As in the Fig. 5 and Fig. As shown in Figure 6, the outer shape 20 is provided with a recessed area 25, which is recessed in the direction in which the slotted area 12 of the concentric winding coil 10 extends (B direction). The recessed area 25 of the outer shape 20 has a shape corresponding to the shape of the projecting area 16 of the concentric winding coil 10. Furthermore, wall areas 26 with a shape corresponding to the shape of the shoulder areas 17 of the concentric winding coil 10 are provided on both sides of the recessed area 25 of the outer shape 20.

[0033] As in Fig. As shown in Figure 7, the surfaces 201a and 202a, on which the outer shape 201 on one side of the slotted areas 12 and the outer shape 202 on the other side of the slotted areas 12 are oriented towards each other, are provided with interlocking projecting areas 201b and interlocking recessed areas 201c (engageable projecting areas 202b and engageable recessed areas 202c). As shown in the Fig. 10 and Fig. Figure 11 shows (a state in which the projections and the recesses are in engagement with each other). Surfaces 201a and 202a, on which the projection areas 201b and the recessed areas 202c (projection areas 202b and recessed areas 201c) are in engagement with each other, are provided along the inclination of the offset area 14 (inclined area 14c) in plan view. Specifically, surfaces 201a and 202a, on which the projection areas 201b and the recessed areas 202c (projection areas 202b and recessed areas 201c) are in engagement with each other, are constructed or structured along a line segment D1 in contact with an inflection point 11b on a central line 11a of the flat rectangular conductor wire 11, where the direction of curvature of the central line 11a changes. More specifically, as shown in Figure 11, the surfaces 201a and 202a, on which the projection areas 201b and the recessed areas 202c (projection areas 202b and recessed areas 201c) are in engagement with each other, are constructed or structured along a line segment D1 in contact with an inflection point 11b on a central line 11a of the flat rectangular conductor wire 11, where the direction of curvature of the central line 11a changes. Fig. As shown in Figure 11, each of the intervening surfaces 201a and 202a has a surface 203 along the line segment D1, and a surface 203b along a line segment D2 that intersects the line segment D1.

[0034] As in the Fig. 5 and Fig. As shown in Figure 6, the forming device 100 for the concentric winding coil 10 has inner forms 30 (punches). The inner form 30 has a plurality of lamellae 32. The lamellae 32 are arranged so that gaps 31, or distances between them, are formed along the direction A in which the sections of the flat rectangular conductor wire 11 of the concentric winding coil 10 are stacked. As shown in the Fig. 12 and Fig. As shown in Figure 13, each of the lamellae 32 is shaped into a circular arc shape according to the circular arc of the annular stator core (not shown) on which the concentric winding coil 10 is arranged.

[0035] The lamellae 32 are designed to correspond to one side and the other side of the pair of slotted areas 12 of the concentric winding coil 10. As shown in the Fig. 12 and Fig. As shown in Figure 13, the lamellae 32 specifically comprise lamellae 32a corresponding to the subdivided outer shape 201 and lamellae 32b corresponding to the subdivided outer shape 202. The lamellae 32a and lamellae 32b are arranged to be offset from one another along the stacking direction A of the flat rectangular conductor wire 11. Specifically, the lamellae 32a and 32b are arranged to be offset from one another in the stacking direction A of the flat rectangular conductor wire 11 according to the shape of the offset region 14 of the coil end region 13.

[0036] As in the Fig. 12 and Fig. As shown in Figure 13, the inner shapes 30 have a first inner shape 30a, which is provided on the side of the first coil end region 13a, and a second inner shape 30b, which is provided on the side of the second coil end region 13b. As shown in Fig. As shown in Figure 12, in the first inner form 30a, the lamellae 32a are arranged such that the lamellae 32a are displaced downwards by the lamellae 32b. As shown in Fig. As shown in Figure 13, in the second inner form 30b the lamellae 32a are arranged such that the lamellae 32a are shifted upwards from the lamellae 32b.

[0037] The inner form 30 is provided with a projection area 33 that extends in the B direction, in which the slotted area 12 of the concentric winding coil 10 extends. The projection area 33 of the inner form 30 has a shape corresponding to the shape of the projection area 16 of the concentric winding coil 10.

[0038] As in Fig. As shown in Figure 5, the forming device 100 for the concentric winding coil 10 has first motion mechanism units 41, each of which has drive sources (not shown), such as a motor or hydraulic pressure. The first motion mechanism unit 41 is structured to move the outer form 20 relative to the concentric winding coil 10 such that the coil end region 13 of the concentric winding coil 10 is inserted into the gaps 21 between the lamellae 22 of the outer form 20 and curved according to the shape of the lamellae 22. Specifically, the first motion mechanism unit 41 moves the outer form 20 such that the outer form 20 approaches the concentric winding coil 10 (in the C1 direction or the C2 direction).Consequently, the concentric winding coil 10 is inserted into the gaps 21 between the lamellae 22, and the coil end region 13 of the concentric winding coil 10 is curved into a circular arc shape according to the circular arc shape of the lamellae 22. The first motion mechanism units 41 have a first motion mechanism unit 41a, which is configured to move the first outer shape 20a relative to the concentric winding coil 10, and a second motion mechanism unit 41b, which is configured to move the second outer shape 20b relative to the concentric winding coil 10.

[0039] In this embodiment, the forming device 100 for the concentric winding coil 10 has second motion mechanism units 42, each having a drive source (not shown), for example, a motor or hydraulic pressure. The second motion mechanism unit 42 is structured to align the outer shape 201 on one side of the slotted areas 12 in the subdivided outer shape 20 with the outer shape 202 on the other side of the slotted areas 12 in an E direction (see Fig. 7) to move along the stacking direction A of the flat rectangular conductor wire 11 such that the offset region 14, which is bent in the stacking direction A of the flat rectangular conductor wire 11, is formed in the coil end region 13 with an offset in the stacking direction A by an amount corresponding to the width W of the individual flat rectangular conductor wire 11. Specifically, the second movement mechanism unit 42 is structured to move the outer shape 201 relative to the outer shape 202 in a direction that intersects the inclination of the offset region 14 (inclined region 14c). Specifically, as shown in the Fig. 10 and Fig. As shown in Figure 11, the second movement mechanism unit 42 is structured to move the outer shape 201 relative to the outer shape 202 in a direction along a line segment E (E direction) that intersects the line segment D1, in contact with the turning point 11b on the central line 11a of the flat rectangular guide wire 11. The line segment E corresponds to a direction along the surface 203b (line segment D2).

[0040] The second motion mechanism units 42 comprise a second motion mechanism unit 42a, configured to move the outer shape 201 of the first outer shape 20a relative to the outer shape 202, and a second motion mechanism unit 42b, configured to move the outer shape 201 of the second outer shape 20b relative to the outer shape 202. The second motion mechanism unit 42a is structured to move the outer shape 201 relative to the outer shape 202 in a direction that follows the line segment D1 (E1 direction; see Fig. 8) crosses, in contact with the turning point 11b on the central line 11a of the flat rectangular conductor wire 11. The second movement mechanism unit 42b is structured to align the outer shape 201 relative to the outer shape 202 in an E2 direction (see Fig. 9), which is opposite to the E1 direction. The outer shape 201 and the outer shape 202 are moved from a state in which the projection areas 201b (projection areas 202b) and the excluded areas 202c (excepted areas 201c) are not in engagement with each other, to a state in which projection areas 201b (projection areas 202b) and excluded areas 202c (excepted areas 201c) are in engagement with each other (see Fig. 18 and Fig. 19) Note that the E1 direction and the E2 direction are examples of a “first direction” and a “second direction” respectively in the claims.

[0041] The forming device 100 for the concentric winding coil 10 has third motion mechanism units 43, each having a drive source (not shown), such as a motor or hydraulic pressure. The third motion mechanism unit 43 is configured to move the inner form 30 relative to the outer form 20 such that the inner form 30 presses the concentric winding coil 10 against the outer form 20 to deform a corner region 19 of the coil end region 13. The third motion mechanism units 43 include a third motion mechanism unit 43a configured to move the first inner form 30a and a third motion mechanism unit 43b configured to move the second inner form 30b.Furthermore, the educational device 100 has a control unit 44 which is configured to control the first motion mechanism units 41, the second motion mechanism units 42 and the third motion mechanism units 43. Effects of the structure of the exemplary embodiment

[0042] In this embodiment, the following effects are achieved.

[0043] As described above, this embodiment provides the second motion mechanism unit 42, which is configured to move the outer shape 201 on one side of the slotted areas 12 in the subdivided outer shape 20 relative to the outer shape 202 on the other side of the slotted areas 12 in the direction (E1 direction or E2 direction) along the stacking direction A of the flat rectangular conductor wire 11, such that the offset area 14, which is bent in the stacking direction A of the flat rectangular conductor wire 11, is formed in the coil end area 13 with an offset in the stacking direction A by an amount corresponding to the width W of the individual flat rectangular conductor wire 11. In one step of forming the offset area 14, a force is therefore applied to the coil end area 13 only in the E direction along the stacking direction A of the flat rectangular conductor wire 11.Consequently, damage to the insulating film of the concentric winding coil 10 (the flat rectangular conductor wire 11) can be prevented, in contrast to a case in which forces in the E direction along the stacking direction A of the flat rectangular conductor wire 11 are applied in addition to the relative direction of movement (sliding direction) of the concentric winding coil 10, i.e., in a case in which the offset region 14 is formed in the coil end region 13 while the outer shape 20 is moved (slides) relatively in the direction in which the outer shape 20 approaches the concentric winding coil 10 (C1 direction or C2 direction).

[0044] In contrast to a case where the concentric winding coil 10 is precisely positioned with respect to each set of forming forms (punches) adapted to the forming direction of the concentric winding coil 10, the bending of the coil end region 13 and the formation of the offset region 14 can be performed in a state where the concentric winding coil 10 is attached to the outer form 20. Consequently, it is possible to reduce or simplify the process of precisely positioning the concentric winding coil 10 with respect to the form (outer form 20). As a result, when the concentric winding coil 10 is formed (when the offset area 14 is formed), damage to the insulating film of the concentric winding coil 10 (the flat rectangular conductor wire 11) can be prevented, while simplifying the process of accurately positioning the concentric winding coil 10 with respect to its shape (outer shape 20).

[0045] In this embodiment, as described above, the surfaces 201a and 202a, on which the outer shape 201 on one side of the slot-receiving areas 12 and the outer shape 202 on the other side of the slot-receiving areas 12 face each other, are each provided with the engageable projection areas 201b and the engageable recessed areas 201c (engageable projection areas 202b and engageable recessed areas 202c). The surfaces 201a and 202a, on which the projection areas 201b and the recessed areas 202c (projection areas 202b and recessed areas 201c) engage with each other, are provided along the inclination of the offset area 14 in plan view.The offset area 14 can therefore be inclined (the inclined area 14c can be formed) by moving the outer shape 201 on one side of the slotted areas 12 and the outer shape 202 on the other side of the slotted areas 12, so that the projecting areas 201b and the recessed areas 202c (projecting areas 202b and recessed areas 201c) are engaged with each other. (Method for forming the concentric winding coil)

[0046] Next, a method for forming the concentric winding coil 10 according to this embodiment is described with reference to the Fig. 5, 6 and 14 to 23 described. (Step for arranging the concentric winding coil)

[0047] As in Fig. As shown in Figure 14, a concentric winding coil 10 is prepared before forming. Before forming, the concentric winding coil 10 is formed in an essentially hexagonal shape by multiple windings of the flat rectangular conductor wire 11. As shown in Fig. As shown in Figure 15, a coil end region 13 of the concentric winding coil 10 is not curved before forming (has an essentially straight shape).

[0048] Next, as in the Fig. 5 and Fig. As shown in Figure 6, the concentric winding coil 10 is arranged before forming between the outer forms 20 (first outer form 20a and second outer form 20b), each having the lamellae 22 arranged to have gaps 21 between them along the A direction into which the areas of the flat rectangular conductor wire 11 are stacked, and which are subdivided to correspond to one side and the other side of the pair of slotted areas 12 of the concentric winding coil 10.When viewed from the side opposite to the direction in which the concentric winding coil 10 is inserted into the outer shape 20, the lamellae 22a of the outer shape 201 on one side of the slotted areas 12 and the lamellae 22b of the outer shape 202 on the other side of the slotted areas 12 are arranged at essentially the same height position in the stacking direction A of the flat rectangular conductor wire 11 (see . Fig. 7) The inner forms 30 are arranged below the concentric winding coil 10. Step towards bending the coil end areas

[0049] Next, as in Fig. As shown in Figure 16, each of the first motion mechanism units 41 moves the outer form 20 relative to the concentric winding coil 10 to insert the coil end region 13 of the concentric winding coil 10 into the gaps 21 between the lamellae 22 of the outer form 20, thereby curving the coil end region 13 of the concentric winding coil 10 according to the shape of the lamellae 22. Specifically, each of the coil end regions 13 (first coil end region 13a and second coil end region 13b) of the concentric winding coil 10 is gradually curved according to the shape of the lamellae 22 (see Figure 16). Fig. 17), by sliding relative to the lamellae 22.

[0050] In this embodiment, the coil end region 13 of the concentric winding coil 10 is curved by inserting the coil end region 13 of the concentric winding coil 10 into the gaps 21 between the lamellae 22 of the outer form 20 in a state in which the lamellae 22a of the outer form 201 on one side of the slotted areas 12 and the lamellae 22b of the outer form 202 on the other side of the slotted areas 12 are arranged at substantially the same height position, when viewed from the side opposite to the direction in which the concentric winding coil 10 is inserted into the outer form 20, as shown in Fig. 7 shown. Thus, a force is applied to the coil end region 13 essentially in a direction in which the coil end region 13 is curved, but not in the E direction along the stacking direction A of the flat rectangular conductor wire 11, in which a force is applied to the coil end region 13 when the offset region 14 is formed, as described later.

[0051] The bending of the first coil end region 13a and the bending of the second coil end region 13b is carried out in parallel by the first outer shape 20a and the second outer shape 20b. Step towards shaping the offset areas

[0052] Next, as in the Fig. 18 and Fig. As shown in Figure 19, in this embodiment each of the second motion mechanism units 42 moves the outer shape 201 on one side of the slotted areas 12 in the subdivided outer shape 20 relative to the outer shape 202 on the other side of the slotted areas 12 in the direction (E direction) along the stacking direction A of the flat rectangular conductor wire 11, thereby forming the offset area 14 in the coil end area 13, which is bent in the stacking direction A of the flat rectangular conductor wire 11, with an offset in the stacking direction A by an amount corresponding to the width W of the individual flat rectangular conductor wire 11 (see Figure 19). Fig. 3 and Fig. 4) Specifically, the second movement mechanism unit 42 moves the outer shape 202 on one side of the slotted areas 12 in the subdivided outer shape 20 relative to the outer shape 202 on the other side of the slotted areas 12 in direction E (see Fig. 10), which crosses the inclination of the offset area 14 (sloping area 14c).

[0053] As in the Fig. 3 and Fig. As shown in Figure 4, the offset area 14, which is bent in the stacking direction A of the flat rectangular conductor wire 11, is formed with an offset in the stacking direction A by an amount corresponding to the width W of the single flat rectangular conductor wire 11 by moving the first curved area 15a of the coil end area 13 to one side in the stacking direction A and the second curved area 15b to the other side in the stacking direction A.

[0054] In this embodiment, as in Fig. As shown in Figure 18, in the first outer form 20a, which is arranged on the side of the first coil end region 13a, the first offset region 14a is formed in the first coil end region 13a by moving the outer form 201 on one side of the slotted regions 12 in the subdivided first outer form 20a relative to the outer form 202 on the other side of the slotted regions 12 in the E1 direction along the stacking direction A of the flat rectangular conductor wire 11. Fig. As shown in Figure 19, in the second outer shape 20b, which is located on the side of the second coil end region 13b, the second offset region 14b, which is offset in the opposite direction to that of the first offset region 14a, is formed in the second coil end region 13b by moving the outer shape 201 on one side of the slotted regions 12 in the subdivided second outer shape 20b relative to the outer shape 202 on the other side of the slotted regions 12 in the E2 direction opposite to the E1 direction. Consequently, the first offset region 14a and the second offset region 14b, which are offset in opposite directions, are formed.

[0055] In this embodiment, the offset area 14 is formed by moving the lamellae 22a of the outer shape 201 on one side of the slotted areas 12 and the lamellae 22b of the outer shape 202 on the other side of the slotted areas 12, in order to move in the E direction along the stacking direction A of the flat rectangular conductor wire 11 (see Fig. 10) from the state in which the lamellae 22a and the lamellae 22b are substantially at the same height positions in the stacking direction A of the flat rectangular conductor wire 11 (see Fig. 7) are arranged to be displaced. Consequently, the outer shape 201 and the outer shape 202 are displaced from the state in which projecting areas 201b (projecting areas 202b) and the excluded areas 202c (excluded areas 201c) are not in engagement with each other (see Fig. 8 and Fig. 9), to the state in which projection areas 201b (projection areas 202b) and the excluded areas 202c (excepted areas 201c) are in engagement with each other (see Fig. 18 and Fig. 19). Consequently, the first offset area 14a and the second offset area 14b are formed.

[0056] In this embodiment, the step to form the first offset region 14a in the first coil end region 13a and the step to form the second offset region 14b in the second coil end region 13e are carried out in parallel by the first outer shape 20a and the second outer shape 20b, respectively. Step to arranging the inner shapes

[0057] Next, as in Fig. As shown in Figure 20, the outer shapes 20 are retracted from the concentric winding coil 10 after the offset regions 14 have been formed in the coil end regions 13. As shown in Fig. As shown in Figure 21, the inner shapes 30 are arranged on an inner peripheral side of the concentric winding coil 10. The step of arranging the inner shapes 30 on the inner peripheral side of the concentric winding coil 10 is carried out by the third motion mechanism units 43. Step towards creating the advantage areas

[0058] Next, as in Fig. As shown in Figure 22, in this embodiment each of the inner shapes 30 is moved relative to the outer shape 20. Specifically, the third movement mechanism unit 43 moves the inner shape 30 such that the inner shape 30 approaches the outer shape 20. As shown in Figure 22, in this embodiment each of the inner shapes 30 is moved relative to the outer shape 20. Fig. As shown in Figure 23, the first movement mechanism unit 41 moves the outer form 20 such that the outer form 20 approaches the inner form 30. The inner form 30 (projection region 33) consequently presses the concentric winding coil 10 against the outer form 20 (excepted region 25) to deform the corner region 19 of the coil end region 13. As a result, the projection region 16 (projection region 16a or 16b) is formed. The concentric winding coil 10 is further pressed against the wall regions 26 of the outer form 20 to form the shoulder regions 17 of the concentric winding coil 10. Furthermore, the slotted areas 12 of the concentric winding coil 10 are deformed (formed) according to the shape of the gaps between the inner shape 30 and the outer shape 20. Specifically, the wall areas 26 of the outer shape 20 and the wall areas 34 of the inner shape 30 (see Fig. 12 and Fig. 13), which face the wall regions 26 of the outer shape 20, have a tapered or conical shape. Consequently, the flat rectangular conductor wire 11, which structures the slotted regions 12 of the concentric winding coil 10, is deformed as it gradually moves towards the outer peripheral side of the concentric winding coil 10 (see Fig. 1) is pushed.

[0059] The formation of the protrusion area 16a and the formation of the protrusion area 16b occurs in parallel by the first inner form 30a and the second inner form 30b. The formation of the concentric winding coil 10 is therefore complete. Effects of the manufacturing process according to the exemplary embodiment

[0060] In this embodiment, the following effects are achieved.

[0061] As described above, this embodiment provides the step of forming the offset region 14 in the coil end region 13, which is bent in the stacking direction A of the flat rectangular conductor wire 11, with an offset in the stacking direction A of the flat rectangular conductor wire 11 by an amount corresponding to the width W of the individual flat rectangular conductor wire 11, by moving the outer shape 201 on one side of the slotted regions 12 in the subdivided outer shape 20 relative to the outer shape 20 on the outer side of the slotted regions 12 in the E direction along the stacking direction A. Consequently, in the step of forming the offset region 14, a force is applied to the coil end region 13 only in the E direction along the stacking direction A of the flat rectangular conductor wire 11.Consequently, damage to the insulating film of the concentric winding coil 10 (of the flat rectangular conductor wire 11) can be prevented, in contrast to the case where forces are applied in the E direction along the stacking direction A of the flat rectangular conductor wire 11 and additionally in the relative direction of movement (sliding direction) of the concentric winding coil 10 (C1 direction or C2 direction), i.e., in the case where the offset region 14 is formed in the coil end region 13, while the outer shape 20 is moved (slid) relatively in the direction in which the outer shape 20 approaches the concentric winding coil 10.

[0062] Similar to the structure according to this embodiment, in the manufacturing process according to this embodiment, when the concentric winding coil 10 is formed (when the offset area 14 is formed), damage to the insulating film of the concentric winding coil 10 (of the flat rectangular conductor wire 11) can be prevented, while simplifying the process of accurately positioning the concentric winding coil with respect to the shape (outer shape 20).

[0063] In this embodiment, as described above, the step to form the offset region 14 comprises the step to form the first offset region 14a in the first coil end region 13 by moving the outer shape 201 on one side of the slotted regions 12 in the subdivided outer shape 20 relative to the outer shape 202 on the other side of the slotted regions 12 in the E1 direction along the stacking direction A of the flat rectangular conductor wire 11, and the step to form the second offset region 14b, which is offset in the opposite direction to that of the first offset region 14a, in the second coil end region 13b by moving the second shape 201 on one side of the slotted regions 12 in the subdivided outer shape 20 relative to the outer shape 202 on the other side of the slotted regions 12 in the E2 direction opposite to the E1 Direction.Consequently, the first offset area 14a and the second offset area 14b, whose offset directions are opposite to each other, can be easily formed.

[0064] In this embodiment, as described above, the step to form the first offset region 14a in the first coil end region 13a and the step to form the second offset region 14b in the second coil end region 13b are performed in parallel by the first outer shape 20a and the second outer shape 20b, respectively. Consequently, the cycle time of the steps to form the first offset region 14a and the second offset region 14b can be reduced compared to a case where the first offset region 14a and the second offset region 14b are formed with a time offset.

[0065] In this embodiment, as described above, the outer form 201 on one side of the slotted areas 12 in the subdivided outer form 20 is moved relative to the outer form 202 on the other side of the slotted areas 12 in the direction E that intersects the inclination of the offset area 14. Consequently, the offset area 14 can be inclined (an inclined area 14c can be formed) so that the relative direction of movement of the outer form 20 is intersected.

[0066] In this embodiment, as described above, the step to bend the coil end region 13 comprises the step to bend the coil end region 13 of the concentric winding coil 10 by inserting the coil end region 13 of the concentric winding coil 10 into the gaps 21 between the lamellae 22 of the outer form 20 in the state in which the lamellae 22a of the outer form 201 on one side of the slotted regions 12 and the lamellae 22b of the outer form 202 on the other side of the slotted regions 12 are arranged at substantially the same height positions, when viewed from the side opposite to the direction in which the concentric winding coil 10 is inserted into the outer form.The gaps 21 between the lamellae 22 are interconnected between the outer shape 20 on one side of the slotted areas 12 and the outer shape 20 on the other side of the slotted areas 12. Consequently, the concentric winding coil 10 can be easily inserted into the interconnected gaps 21.

[0067] According to this embodiment, as described above, the step to form the offset area 14 comprises the step of forming the offset area 14 by moving the lamellae 22a of the outer shape 201 on one side of the slotted areas 12 and the lamellae 22b of the outer shape 202 on the other side of the slotted areas 12 to be displaced in the E direction along the stacking direction A of the flat rectangular conductor wire 11 from the state in which lamellae 22a and lamellae 22b are arranged at substantially the same height positions.Consequently, the offset area 14 can be easily formed without changing the arrangement position of the concentric winding coil 10 by simply moving the outer shape 201 on one side of the slotted areas 12 and the outer shape 202 on the other side of the slotted areas 12 in the E direction along the stacking direction A of the flat rectangular conductor wire 11, after the coil end area 13 has been bent into the state in which the lamellae 22a of the outer shape 201 on one side of the slotted areas 12 and the lamellae 22b of the outer shape 202 on the other side of the slotted areas 12 are arranged at substantially the same height positions in the stacking direction A of the flat rectangular conductor wire 11.

[0068] As described above, this embodiment provides the step of arranging the inner shapes 30 on the inner peripheral side of the concentric winding coil 10 after the step of forming the offset regions 14 in the coil end regions 13, and the step of deforming the corner regions 19 of the coil end regions 13 by moving the inner shapes 13 relative to the outer shapes 20 such that the inner shapes 30 press the concentric winding coil 10 against the outer shapes 20.Consequently, in contrast to a case where the step of forming the offset areas 14 in the coil end areas 13 and the step of deforming the corner areas 19 of the coil end areas 13 are carried out in parallel, damage to the insulating film of the concentric winding coil 10 (of the flat rectangular conductor wire 11) due to forces applied in the E direction along the stacking direction A of the flat rectangular conductor wire 11 and additionally in the relative direction of movement (sliding direction) of the concentric winding coil 10 (C1 direction or C2 direction) can be prevented. Modified examples

[0069] It should be understood that the embodiment disclosed herein is exemplary and is not limited in this respect. The scope of the present invention is defined by the claims rather than by the description of the above embodiment and includes meanings of equivalents to the elements in the claims and all modifications (modified examples) within the scope of the claims.

[0070] The embodiment described above illustrates an example using a concentric winding coil formed by multiple windings of the flat rectangular conductor wire. However, the present invention is not limited to this. For example, a coil other than the concentric winding coil formed by multiple windings of the flat rectangular conductor wire can be used.

[0071] In the embodiment described above, a description has been given for the example in which the formation of the first offset region and the formation of the second offset region (the bending of the first coil end region and the bending of the second coil end region, and the formation of the protruding region of the first coil end region and the formation of the protruding region of the second coil end region) are carried out in parallel. However, the present invention is not limited to this. For example, the formation of the first offset region and the formation of the second offset region (the bending of the first coil end region and the bending of the second coil end region, and the formation of the protruding region of the first coil end region and the formation of the protruding region of the second coil end region) can be carried out independently of each other with a temporal offset.

[0072] In the embodiment described above, a description has been given for an example in which the surfaces on which the outer shape faces one side of the slotted areas and the outer shape faces the other side of the slotted areas are provided with the engageable projection areas and the engageable recessed areas. However, the present invention is not limited to this. For example, the surfaces on which the outer shape faces one side of the slotted areas and the outer shape faces the other side of the slotted areas can be flat surfaces.

[0073] In the embodiment described above, a description has been given for the example in which the first and third motion mechanism units each move the outer and inner shapes relative to the concentric winding coil in the direction in which the outer and inner shapes approach each other. However, the present invention is not limited to this. For example, the concentric winding coil can be moved in a state in which the outer and inner shapes are fixed.

[0074] In the embodiment described above, a description has been given for the example in which the outer shapes (inner shapes) are arranged on both the first and second coil end regions of the concentric winding coil. However, the present invention is not limited to this. For example, the concentric winding coil can be formed while the outer shape (inner shape) is arranged on only one of the first and second coil end regions. Thus, after the first coil end region of the concentric winding coil has been formed, the second coil end region of the concentric winding coil can be formed by moving the outer shape (inner shape) that forms the first coil end region.

[0075] In the embodiment described above, a description has been given for the example in which the inner shape is not subdivided, unlike the outer shape. However, the present invention is not limited to this. For example, the inner shape can be subdivided to correspond to one side and the other side of the pair of slotted areas of the concentric winding coil, similar to the outer shape. Description of reference symbols 10 concentric winding coils (coils) 11 flat rectangular conductor wire 12, 12a, 12b slotted area 13 Coil end area 13a first coil end area 13b second coil end area 14 Offset range 14a first offset area 14b second offset area 16, 16a, 16b Corner area 20, 201, 202 outer form (stamp) 20a first outer form (stamp) 20b second outer form (stamp) 21 Gap 22, 22a, 22b lamella 30, 30a, 30b inner form (stamp) 41, 41a, 41b first movement mechanism unit 42, 42a, 42b second movement mechanism unit 100 Education apparatus 201a, 202a Area 201b, 202b Leading area 201c, 202c exempt area A Stacking direction E1 first direction E2 second direction W width

Claims

[1] Method for forming a coil (10) formed by repeatedly winding a flat rectangular conductor wire (11), the method comprising: a step for bending a coil end region (13) of the coil (10) such that an outer form (20) having a plurality of arcuate lamellae (22) arranged to form gaps (21) between them along a direction in which regions of the flat rectangular conductor wire (11) of the coil (10) are stacked, and subdivided to correspond to one side and the other side of a pair of slotted regions (12) of the coils (10), is moved relative to the coil (10) to insert the coil end region (13) of the coil (10) into the gaps (21) between the lamellae (22) of the outer form (20), the coil end region (13) being bent according to a shape of the lamellae (22); and a step to form an offset region (14) in the coil end region (13) which is bent in a stacking direction (A) of the flat rectangular conductor wire (11), with an offset in the stacking direction (A) of the flat rectangular conductor wire (11) by an amount corresponding to a width (W) of the single flat rectangular conductor wire (11) by moving the outer shape (201) on one side in the subdivided outer shape (20) relative to the outer shape (202) on the other side in the direction along the stacking direction (A). [2] Method for forming a coil (10) according to claim 1, wherein the coil end region (13) has a first coil end region (13a) which is provided on one side of the coil (10) and a second coil end region (13b) which is provided on the other side of the coil (10), the outer shape (20) has a first outer shape (20a) provided on a first coil end region side, and a second outer shape (20b) provided on a second coil end region side, and The step to form the offset region (14) comprises a step to form a first offset region (14a) in the first coil end region (13a) by moving the outer shape (201) on one side of the slotted regions (12) in the subdivided first outer shape (20a) relative to the outer shape (202) on the other side of the slotted regions (12) in a first direction along the stacking direction (A) of the flat rectangular lead wire (11), and a step to form a second offset region (14b) offset in a second direction opposite to the direction of the first offset region (14a) in the second coil end region (13b).by moving the outer shape (201) on one side of the slotted areas (12) in the subdivided second outer shape (20b) relative to the outer shape (202) on the other side of the slotted areas (12) in the second direction opposite to the first direction. [3] Method for forming a coil (10) according to claim 2, wherein the step of forming the first offset region (14a) in the first coil end region (13a) and the step of forming the second offset region (14b) in the second coil end region (13b) are carried out in parallel by the first outer shape (20a) and the second outer shape (20b), respectively. [4] Method for forming a coil (10) according to any one of claims 1 to 3, wherein the direction in which the outer shape (201) on one side of the slotted areas (12) in the subdivided outer shape (20) is moved relative to the outer shape (202) on the other side of the slotted areas (12) in a direction which intersects an inclination of the offset area (14). [5] A method for forming a coil (10) according to any one of claims 1 to 4, wherein the step for bending the coil end region (13) comprises a step for bending the coil end region (13) of the coil (10) by inserting the coil end region (13) of the coil (10) into the gaps (21) between the lamellae (22) of the outer form (20) in a state in which the lamellae (22a) of the outer form (201) for one side of the slotted regions (12) and the lamellae (22b) of the outer form (202) for the other side of the slotted regions (12) are arranged at substantially the same height positions in the stacking direction (A) of the flat rectangular conductor wire (11), when viewed from one side opposite to a direction in which the coil (10) is inserted into the outer form (20). [6] Method for forming a coil (10) according to any one of claims 1 to 5, further comprising: a step to arrange an inner shape (30) on an inner peripheral side of the coil (10) after the step of forming the offset region (14) in the coil end region (13); and a step to deform a corner region (16) of the coil end region (13) by moving the inner shape (30) relative to the outer shape (20) such that the inner shape (30) pushes the coil (10) against the outer shape (20). [7] Device (100) for forming a coil (10) according to a method according to any one of claims 1 to 6, which is configured to form a coil (10) formed by multiple windings of a flat rectangular conductor wire (11), wherein the device (100) comprises: an outer shape (20) having a plurality of arc-shaped lamellae (22) arranged such that gaps (21) are formed between them along a direction in which areas of the flat rectangular conductor wire (11) of the coil (10) are stacked, and which are subdivided to correspond to one side and the other side of a pair of slotted areas (12) of the coil (10); a first motion mechanism unit (41) configured to move the outer shape (20) relative to the coil (10) such that a coil end region (13) of the coil (10) is inserted into the gaps (21) between the lamellae (22) of the outer shape (20) and curved according to a shape of the lamellae (22); and a second movement mechanism unit (42) configured to move the outer shape (201) on one side in the subdivided outer shape (20) relative to the outer shape (202) on the other side in a direction along a stacking direction (A) of the flat rectangular conductor wire (11), such that an offset region (14) bent in the stacking direction (A) of the flat rectangular conductor wire (11) is formed in the coil end region (13) with an offset in the stacking direction (A) by an amount corresponding to a width (W) of the single flat rectangular conductor wire (11). [8] Device (100) for forming a coil (10) according to claim 7, wherein Surfaces (201a, 202a) on which the outer shape (201) on one side of the slotted areas (12) and the outer shape (202) on the other side of the slotted areas (12) are oriented towards each other, each provided with an engageable projection area (201b, 202b) and an engageable recessed area (201c, 202c), and the surfaces (201a, 202a) on which the projection area (201b, 202b) and the excluded area (201c, 202c) are interlocked are provided along a slope of the offset area (14) in plan view.

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