Patent ID: 8351148

Claim:
A magnetic tape library device comprising: a plurality of cartridge housing bodies for housing a plurality of magnetic tape cartridges inside thereof; a device main body for housing the cartridge housing bodies within a same plane in a freely movable manner and in series in an inserting/extracting direction from an inserting/extracting slot; a connecting mechanism for enabling the plurality of cartridge housing bodies to be connected with each other so as to cause the connected cartridge housing bodies to move together in unison in the inserting/extracting direction or to be released by a releasing operation from outside the magnetic tape library device; and a locking mechanism for enabling at least the cartridge housing body on a back side of the inserting/extracting direction of the device main body, among the plurality of cartridge housing bodies, to be locked so as to prevent the cartridge housing body on the back side from being released from the device main body or to be released from a locked state at the inserting/extracting slot side, wherein the lock mechanism includes an operation mechanism unit that operates to release the locked state of the cartridge housing body, wherein the operation mechanism unit includes a rotating lever part provided at one side face in a width direction of the cartridge housing body, and wherein the rotating lever part releases the locked state of the device main body and the cartridge housing body with a force applied from outside the magnetic tape library device.