Patent ID: 11925970
Assignee: NITTOKU CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H  A | IPC A  B  H

Claim 4:
5. A coil winding method for winding a wire rod around a string-shaped core rod in a spiral manner, the coil winding method comprising:
inserting the core rod through a core rod nozzle while applying a predetermined tension to the core rod;
inserting the wire rod into a wire rod nozzle and clamping the wire rod toward the wire rod nozzle with a wire rod clamping tool;
moving a retracting rod of a fluid pressure cylinder in a moving direction with respect to a main body portion of the fluid pressure cylinder to move the wire rod nozzle closer to the wire rod clamping tool;
moving the wire rod clamping tool and the wire rod nozzle closer to the core rod, together with the wire rod; and
revolving the wire rod around the core rod in a vicinity of the core rod nozzle while drawing out the core rod from the core rod nozzle against the tension.