Patent ID: 8372521

Claim:
A twisted wire production method comprising: arranging at least two wires with opposite end portions to be twisted together side by side, moving a moving member from one end portion of the wires toward the other end portion of the wires, to twist the wires together between the moving member and the one end, and to remove a twist of the wires between the moving member and the other end of the wires; wherein: when a portion of the twisted wire that extends from the one end portion to a first predetermined position is defined as a one end-side twisted portion, and a portion of the twisted wire that extends from the first predetermined position to a second predetermined position is defined as an intermediate twisted portion, and a portion of the twisted wire that extends from the second predetermined position to the other end portion is defined as another end-side twisted portion, lowering a speed of movement of the moving member at the one end-side twisted portion and the other end-side twisted portion than at the intermediate twisted portion, or raising a speed of twisting of the wires together at the one end-side twisted portion and the other end-side twisted portion than at the intermediate twisted portion, wherein a twisting diameter of the one end-side twisted portion and the other end-side twisted portion is substantially the same as a twisting diameter of the intermediate twisted portion with respect to a longitudinal axis of the twisted wire.