US Patent 7621031 Pallet exchanging device

A pallet exchanging device is provided which can secure a sufficient working space and can cope with a multi-phase pallet exchanging system without increasing the size of the device. In a pallet exchanging device, a pallet stocker is constituted so that any pallet placing pedestal can be brought to a delivery position where a pallet is delivered and received to/from an arm, and the arm can be moved between a first position where pallets are exchanged in the working machine main body and a second position where a pallet is delivered and received at the delivery position of the pallet stocker. When the arm is moved to the second position, a space for a worker is provided on a front side of a work carry-in port.