Patent ID: 7748249
Filing Date: 2010-07-06
Classification: B21D

Abstract:
1. A workpiece conveyance device for a press machine, the workpiece conveyance device comprising: a first transfer bar extending in a feed direction; a second transfer bar arranged in parallel to the first transfer bar; a first support member supporting the first transfer bar such that the first transfer bar is movable in the feed direction, wherein the first support member is movable in a lift direction; a second support member supporting the second transfer bar such that the second transfer bar is movable in the feed direction, wherein the second support member is movable in the lift direction; a first linear motor interposed between the first support member and the first transfer bar for driving the first transfer bar in the feed direction relative to the first support member; a second linear motor interposed between the second support member and the second transfer bar for driving the second transfer bar in the feed direction relative to the second support member; lift devices for driving the first support member and the second support member in the lift direction; and workpiece holding jigs detachably mounted to the first transfer bar and the second transfer bar for holding a workpiece such that the workpiece is fed in the feed direction.