| CPC H02K 15/0485 (2013.01) [H02K 3/28 (2013.01)] | 4 Claims |
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1. A coil forming apparatus that forms a band-shaped coil in a wound state, the band-shaped coil including a plurality of straight portions and side ends provided on both ends of the plurality of straight portions, the coil forming apparatus comprising:
a coil winding jig that winds the band-shaped coil, the coil winding jig including a plurality of comb-shaped grooves on an outer periphery thereof, each of which can hold a respective one of the plurality of straight portions therein;
a coil conveying mechanism that pivotally conveys the band-shaped coil along at least a portion of the outer periphery of the coil winding jig; and
guide members that are provided in a vicinity of both ends of the coil winding jig in an axial direction, and guide the band-shaped coil in an arc shape to insert in a respective one of the plurality of comb-shaped grooves while being in contact with the side end,
wherein the coil conveying mechanism include a first half portion of pivot conveying that is where the band-shaped coil is introduced, and a second half portion of pivot conveying that is where the band-shaped coil is discharged,
wherein the guide members include a diameter-reducing guide part provided to gradually reduce in diameter in the second half portion of pivot conveying of the band-shaped coil along a path of the pivot conveying and thereby gradually presses the band-shaped coil toward the coil winding jig, and
an extension guide part which links to an end edge of the diameter-reducing guide part and extends a predetermined length by maintaining the diameter according to curvature of the end edge, and thereby maintains an outer diameter of the band-shaped coil that has been reduced by the diameter-reducing guide part.
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