PURPOSE: To enhance the operability and load-handling property of moveable racks by using a stopping position setting circuit to set stopping of a designated moveable rack at its predetermined stopping position, using a motor to rotate a number of moveable racks aligned and connected together and stopping the motor in response to detection of the number of the designated moveable rack.

CONSTITUTION: When the number of each of multiple moveable racks 1 aligned and connected together via a rotary plate 4 is preset by a stopping position setting circuit 13 so that each of the racks stops at a predetermined stopping position SP, then the direction of movement of each of the racks is determined by a direction selecting circuit X1 or X2 using the output of an encoder E4 which is produced by the setting of the number, and those of direction selecting encoders E1, E2 selected according to that moveable rack 1 to be detected at its stopping position SP by a number detecting circuit 12, while a motor 2 is driven by the output of a timing adjusting circuit 14. When the number detecting circuit 12 detects arrival of the moveable rack with the designated number at its stopping position SP, the motor is stopped via an encoder E3 for stopping, a coincidence circuit X3 and a monostable circuit 17. It is thus enabled to enhance the operability and load-handling property of the moveable racks.