Patent ID: 7100173

Claim:
A library apparatus comprising: storage medium storing shelves for storing a plurality of storage media; a drive performing at least information reproduction for storage media; a moving mechanism moving storage media between the storage medium storing shelves and the drive; and a cover member inside which the storage medium storing shelves, the drive and the moving mechanism are disposed, wherein said moving mechanism comprises: a vertical rail fixed on said cover member in a vertical direction, such that said vertical rail remains stationary with respect to said cover member; a horizontal rail extending in a horizontal direction with respect to said vertical rail, said horizontal rail moving along said vertical rail in a vertical direction; a storage medium input-output machine moving along said horizontal rail in the horizontal direction to perform an operation for input-output of storage media to the storage medium storing shelves and the drive; and a mounting section for mounting an extending member for extending said horizontal rail, wherein said extending member extends in the horizontal direction and is used for increasing the horizontal length of the horizontal rail to extend into a second library apparatus.