Patent ID: 8091211

Claim:
A coil forming method for forming said coil constructed by edgewise and rectangular winding of one piece of rectangular wire rod in a manner in which the wound rectangular wire rod is stacked rectangularly and cylindrically and, at least, a first coil element and a second coil element are aligned in parallel to each other in a continuous state and winding directions of said rectangular wire rod are reversed to each other, and for forming first and second coil elements from one piece of rectangular wire rod using a first winding head and a second winding head mounted apart by a predetermined interval from said first winding head, said method comprising: a first feeding process comprising providing a rectangular wire rod having a length required for winding to form said first coil element and second coil element and feeding said rectangular wire rod from said second winding head side to said first winding head side to set said rectangular wire rod to said first winding head and to set an end portion of said rectangular wire rod to a state of protruding from said first winding head by a predetermined length; a first winding process comprising winding said rectangular wire rod by using said first winding head until the number of windings of said first coil element reaches a specified value to form said first coil element; a second feeding process comprising feeding said rectangular wire rod at an end of which the first coil element is formed again from said second winding head side to said first winding head side; a first forming process comprising setting said first coil element to a state of having a specified posture by bending said rectangular wire rod to rotate the entire first coil element approximately 90 degrees; a third feeding process comprising feeding said rectangular wire rod from said second winding head side further to said first winding head to ensure a winding portion for said second coil element; and a second winding process comprising winding said rectangular wire rod by using said second winding head until the number of windings of said second coil element reaches a specified value to form said second coil element.