Coil forming apparatus and coil forming method

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 having a plurality of comb-shaped grooves, and configured to be capable of winding the band-shaped coil by inserting the plurality of straight portions of the band-shaped coil into a respective on the plurality of comb-shaped grooves;
• a coiling conveying mechanism unit configured to be capable of pivotal conveying the band-shaped coil;
• 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 while being in contact with the side end of the band-shaped coil, and insert the plurality of straight portions in a respective one of the plurality of comb-shaped grooves in a second half portion of pivotal conveying of the band-shaped coil,
• wherein the coil conveying mechanism unit includes a conveying rail that provides a conveying path pivotally conveying the band-shaped coil along the coil winding jig, and a conveyor that moves along the conveying rail in a state gripping each of the plurality of straight portions of the band-shaped coil,
• wherein the conveyor has a plurality of gripping grooves which grip a respective one of the plurality of straight portions of the band-shaped coil, and
• wherein the plurality of gripping grooves have a coil abutting bottom surface of a depth according to an overlapping number of the plurality of straight portions which differs according to position in a conveying direction of the band-shaped coil.