Patent ID: 6959573

Claim:
A bending apparatus that reciprocates at least one of an upper table to which a punch is mounted and a lower table to which a corresponding plurality of adjacent divided dies are mounted, the bending apparatus comprising: at least one bending angle detector, provided between the dies, that detects a bending angle of the workpiece; a main body that inserts the bending angle detector into a gap between the dies and that withdraws the bending angle detector from the gap between the dies; a lift that is biased upward by a first elastic body and that is configured to be pressed downward by the workpiece at approximately a center of a groove portion of the dies, the lift including a first engagement member; a rotor support that is biased upward by two second elastic bodies having smaller biasing forces than the first elastic body, the rotor support including second engagement members; two rotors on opposite sides of the groove portion at an upper portion of the rotor support, the two rotors including workpiece contacts that contact the workpiece; links that rotatably engage the first engagement member to stop an upper end of the lift in a position lower than an upper surface of the dies, and that rotatably engage the second engagement members to position the workpiece contacts below the upper surface of the dies; and a bending angle calculator that converts rotating amounts of the two rotors into bending angles of the workpiece.