To improve space efficiency, to eliminate the need for labor at the time of housing and to reduce the cost of equipment.

Pallets 10 lifted and lowered along a plurality of columns 4, 4c arranged at regular intervals and used for lifting and lowering and a drive mechanism 20 elevated and brought down along a guide installed to one of the columns 4, 4c for lifting and lowering are connected detachably by chains 8 or wires, the pallets 10 are hung down, and the pallets 10 are brought down or elevated by the lifting/lowering of the drive mechanism 20.