Patent ID: 7255336

Claim:
A workpiece clamp device for clamping a workpiece, comprising: a workpiece cradle for placing the workpiece in a horizontal position, the workpiece cradle having ends; first free rotating rollers rotatably supported by supporting members at positions separated from the ends of the workpiece cradle; levers supported by the supporting members vertically swingably about rotational centers of the first free rotating rollers, the levers having distal ends; actuators provided to the supporting members in order to swing the levers from raised positions thereof to positions where the levers hang over the workpiece cradle; second free rotating rollers rotatably supported at the distal ends of the levers; endless belts wound around the first free rotating rollers and the second free rotating rollers, the endless belts having lowermost ends; and third free rotating rollers disposed inside loops of the endless belts in order to pull down the lowermost ends of the endless belts wound around the first free rotating rollers and the second free rotating rollers.