Coil mounting device and coil mounting method

A coil mounting device for mounting a belt-shaped coil to a stator core along a circumferential direction of the stator core by inserting straight portions of the belt-shaped coil into slots from an inside of a stator core, the coil mounting device comprising:

• the stator core;
• a coil winding jig that has inter-comb-teeth grooves radially arranged on an outer periphery thereof, has an outer diameter smaller than an inner diameter of the stator core, and is configured to wind therearound the belt-shaped coil in an annular shape while the straight portions of the belt-shaped coil are inserted into the inter-comb-teeth grooves from outside;
• a stator core fixing jig that fixes the stator core at a predetermined position and in a predetermined posture;
• and
• a coil expansion mechanism that expands the belt-shaped coil wound around the coil winding jig from inside toward outside with respect to the belt-shaped coil,
• wherein the coil expansion mechanism comprises
• a holder that holds the coil winding jig having the belt-shaped coil wound therearound inside the stator core fixed to the stator core fixing jig in a state where the inter-comb-teeth grooves are matched in phase with the slots, and
• a coil expander that presses, from inside toward outside with respect to the belt-shaped coil, a portion of the belt-shaped coil wound around the coil winding jig held by the holder, the portion being nearer to a side end of the belt-shaped coil than the straight portions, thereby inserting the straight portions into the slots.