Patent ID: 6976378

Claim:
A bending machine for bending a workpiece having an elongated form, comprising: a first fixture member for holding one end portion of the workpiece thereon; a second fixture member for holding the other end portion of the workpiece thereon; a first rack mounted on the first fixture member so as to extend in a longitudinal direction of the first fixture member; a bending die having a form of a roll, secured on the second fixture member, means for bending the workpiece around an outer peripheral surface of the bending die; a pinion gear, attached fixedly and coaxially with the bending die, adapted for meshing with the first rack; and a connecting means for connecting the first fixture member to the second fixture member to allow the first and second fixture members to rotate relatively so that the pinion gear is movable along the first rack while engaging therewith, wherein said bending die is movable together with the pinion gear to bend the workpiece, when one of said fixture members rotates relative to the other fixture member, wherein said connecting means comprises: a second rack meshing with the pinion gear, said first and second racks being provided with equal pitch, said second rack being arranged parallel to the first rack; and a linear driving mechanism for linearly reciprocating the second rack to cause the bending die to rotate with the pinion gear while engaging with the first rack.