Stator winding apparatus

A coil winding apparatus comprising:

• a main shaft;
• a shaft drive mechanism for actuating said main shaft so that it may repeatedly carry out motion of which one cycle comprises a first axial movement, forward rotation, opposite axial movement and backward rotation with four turning points of motion in said cycle;
• an oscillating arm pivotally mounted on said main shaft;
• wire delivery means mounted on one end of said oscillating arm to be revolved around a coil form on which a wire is to be wound in the form of a coil while feeding said wire therefrom from a winding start position to a winding finish position with said motion of said main shaft to accomplish the coil winding operation;
• and
• a traverse mechanism for traversing said oscillating arm and wire delivery means substantially radially with respect to said main shaft in a predetermined motion;
• said traverse mechanism comprising a traverse drive mechanism with a cam actuated in synchronism with said motion of said main shaft and determining the amount of traverse of said oscillating arm and a traverse transmission mechanism interposed between said oscillating arm and said traverse drive mechanism;
• said traverse transmission mechanism including a cam follower provided on another portion of said oscillating arm, said cam and cam follower being engaged together to transmit the movement and amount of traverse of said traverse drive mechanism therethrough to said oscillating arm;
• a detector for electrically detecting said motion of said main shaft to actuate said traverse mechanism according to the detected motion of said main shaft;
• and
• said detector comprising a first detection means for detecting the turning points of said motion of said main shaft and a second detection means for detecting the winding start position and the winding finish position along a direction substantially radially of said main shaft.