Single coil of coil unit for linear motor, method and device for winding and forming the same, and method for forming and fabricating coil unit

A device for winding a single coil of a coil unit for a linear motor, the single coil having a shape of a nearly rectangular ring as a whole, the device comprising:

• a conductive wire feeding out mechanism for feeding out a conductive wire serving as material for the single coil in a direction of a Z-axis, where a direction for the conductive wire to be fed out is defined as the Z-axis, and axes crossing at right angles within a plane perpendicular to the Z-axis are defined as X- and Y-axes, respectively;
• a winding former positioned with its center at a point of origin on the X- and Y-axes, the winding former having locks for the conductive wire at positions corresponding to vertices of said rectangle and functioning as a base in winding said conductive wire into the nearly rectangular shape;
• and
• a first rotating mechanism and a second rotating mechanism for allowing the winding former to rotate about the X and Y, axes respectively, and wherein
• the first and second rotating mechanisms repeat rotating the winding former by 180 degrees about the X-axis and by 180 degrees about the Y-axis alternately so that the single conductive wire fed from the conductive wire feeding out mechanism in the direction of the Z-axis is wound around the winding former while being locked to the locks in succession.