Patent ID: 8857042

Claim:
A manufacturing method of a stator for an electric rotating machine, the manufacturing method comprising the steps of: preparing an annular stator core including a plurality of slots arranged along a circumferential direction, wherein each of the slots includes an opening that opens in an inner circumference of the stator core, and a slot pitch between adjacent ones of the slots increases toward outside in a radial direction of the stator core; preparing the plurality of coils, wherein each of the coils is formed in advance from a conductor wire and includes two coil ends, a first side, and a second side, and the first side and the second side are shaped to a form that fits within the slots of the stator core; preparing a jig that can be arranged at a radially inner side of the stator core, wherein the jig includes a plurality of holding grooves, which are respectively opposed to the openings in a state arranged at the radially inner side of the stator core, and two end surfaces, which are located on two axial ends of the jig; setting each of the coils to the jig so that at least one of the first side and the second side is inserted in the holding groove of the jig and the two coil ends protrude outward in an axial direction of the jig from the two end surfaces; arranging the jig at the radially inner side of the stator core; and inserting the first side and the second side into the slots of the stator core by applying a force with an ejecting portion to the coil that ejects at least one of the first side and the second side inserted in the holding groove out of the holding groove and into a corresponding one of the slots, while applying a pushing force with a pushing portion to the two coil ends from an axial direction of the stator core and increasing the distance between the first side and the second side of the coil.