Patent ID: 7198187

Claim:
A spring manufacturing machine, comprising: a machine casing having a front wall, the front wall having a through hole, a wire rod processing space being defined in front of the through hole for accommodating at least two tool mounting slides; a wire rod feeding unit provided in the machine casing and at a rear side of the front wall, said wire rod feeding unit having a casing, a final wire rod guide provided in the casing in alignment with the through hole and having a wire rod passage for guiding a wire rod discharged to a front from a rear and toward the wire rod processing space, and at least a pair of wire rod feeding rollers which are rotatably provided in the casing and which discharges the wire rod toward the final wire rod guide while pinching the wire rod, said wire rod feeding unit being freely movable forward and backward and freely rotatable around a center line of the wire rod passage of the final wire rod guide; and an actuating apparatus for moving said wire rod feeding unit forward and backward, and having a motor having a reversible rotatable shaft; an oscillating arm having a fixed end attached to the rotatable shaft of the motor, and a free end that oscillates forward and backward when the rotatable shaft is moved, a projection provided at the free end of the oscillating arm and disposed along the center line of the wire rod passage of the final wire rod guide, and an annular body connected to said wire rod feeding unit and having an annular groove that receives the projection, the annular groove being concentric to the center line of the wire rod passage of the final wire rod guide.