Coil winding method and winding apparatus

A winding method of a coil in which a plurality of unit wound portions having different inner circumferential lengths from each other is continuously formed in the winding axis direction, each of the unit wound portions is wound along a loop shape winding route having a plurality of arc shape corner parts, and unit coil portions including the pluralities of unit wound portions are continuously formed in the winding axis direction, the method comprising:

• a first step of transferring a conductive wire by a predetermined distance along a straight transition path crossing a shaft body, and fitting the conductive wire along an outer circumferential surface of the shaft body;
• and
• a second step of winding the conductive wire on the outer circumferential surface of the shaft body by rotating a pressing member to be pressed onto the conductive wire along a circumferential route about the shaft body, so as to form arc shape corner parts, wherein
• one unit wound portion is formed by repeating the first step and the second step by the number of times of the corner parts, and by changing an outer diameter of the shaft body at the time of formation of the corner parts in a process of forming one unit wound portion, the pluralities of corner parts formed at the same phase angle with respect to the winding axis in the plurality of unit wound portions forming the unit coil portion are formed in an arc shape having curvature center at the same position.