Abstract
A first robot ( 104 ) is arranged in association with a belt conveyor ( 101 ), and performs a first transfer operation of picking up a product such as a blank material conveyed by the belt conveyor ( 101 ) and stacking it on a relay table ( 102 ). A second robot ( 108 ) performs a second transfer operation of transferring a loaded body of a plurality of blank materials stacked on the relay table ( 102 ) to a pallet table ( 103 ).