a reel for fastening reinforcing bars the method comprises pressurizing an outer circumferential surface of the wire inwardly in the radius directions of the reel so that elastic forces in the directions which the outer diameter of the wire is increased are deprived therefrom and the condition of wound wire is maintained after the pressure is released application_number US 45726699 A description hereinafter embodiments of the present invention will be described in detail with reference to the attached drawings in fig1 the numeral 1 designates a reel and the reel 1 is intergrally formed with a hub 2 and a flange 3 into a center hole 2 a of the hub 2 a real support shaft of a reinforcing bar fastening machine not shown is inserted and the reel 1 is rotatably supported in order to wind a wire w around the reel 1 the reel 1 is installed to a wire winding machine and the wire w is wound at a predetermined winding torque as shown in fig1 b the wire w is spirally wound with making multi layer spiral winding if a tip portion of the wire w is not fixed with a tape or the like the wire w is swelled because elastic restitutive force loosens the winding now as shown in fig2 the outer circumference of the wire w is pressurized inwardly in the radius direction with a chuck 4 of chuck tape presseurizing.