To provide a conveyance device between presses which reduces excess or shortage of a counter balance force even when a feed carriage moves in a conveyance direction and a position of centroid of a lift moving body changes.
The conveyance device 10 between the presses carries a workpiece 1 from a press device 2A at an upstream side having counter balance tanks 3A, 3B for reducing a load when a slide is elevated/lowered to a press device 2B at a downstream side. The conveyance device 10 between the presses is provided with a lift carriage 12, the feed carriage 14, a counter balance mechanism 18 and a pressured air supply device 20. The pressured air supply device 20 has a function which supplies pressured air to a rod side of each counter balance cylinder 18A, 18B from the counter balance tanks 3A, 3B of the press devices 2A, 2B, increase the pressure of the moving side of the feed carriage 14, and reduces the pressure of the opposite side thereof.
Uchiumi, Yuji
Narimatsu, Akitada
Next Patent: HOT-BENDING METHOD OF METAL TUBE
