Stator structure for rotary electric machine and method for assembling stator

A method of assembling a stator for a rotary electric machine including a stator core having a cylindrical shape in which slots and pole pieces are formed on an inner peripheral side and alternately arranged in a circumferential direction, a conductor segment which is a conducting wire having a rectangular cross section inserted in one of the slots through an insulator being connected with a conductor segment similarly inserted in another slot to form a coil,

• wherein the method comprises:
• inserting and holding a predetermined number of the conductor segments in each insulator having a shape including a pair of opposite side surface portions connected with an intermediate portion along a wall surface defining the slot, and
• inserting the insulators holding the conductor segments into the slots,
• wherein a distance between end protrusions formed at free ends of the side surface portions of each insulator is smaller than a thickness of each conductor segment after the insertion so that the conductor segments are positioned by the end protrusions.