The present invention, in the tension exchanger (11) leading to the coil (C) wound on the traverse (10) inducing roll 12 for feeding by the by winding a coil (C) to the core device: a frame (F) of and intermittently forwarding the forward and backward to transfer force by the feed screw 26 connected to the rotary motor 24 to the inside in accordance with the weight and volume chwiryang of the coil (C) provided with a control means 25 for adjusting the interval and a first jig (20) having a core (21) for rotating the take-up coil of the a layer (C); A second jig (30) mounted in the axial direction opposite to the first jig 20, a guide portion 31 for rotating the take-up the B layer of the coil (C); A second jig (the second jig (30) one end to a fixing an end portion of the winding 41 and the coil (C) for receiving to form the B layer fixed finger (42) of the coil (C) of, and preliminary jig to the driven rotation by the rotational pressure of 30) for adjusting the tension of the B layer of the coil (C) (40); And are connected by a belt to a second jig (30) and the first jig 20, the drive means for transmitting rotational force of the same (50); and characterized in that comprises a.
Accordingly, the present invention provides an effective and at the same time forming the both ends of the coil portion toward the outside in the same manner to adjust the tension of each end portion to reduce significantly the error rate and improve productivity by winding.