Patent ID: 8681452

Claim:
A library device configured to comprise a magazine which can contain a plurality of cartridges each provided with a recording medium built-in therein, and to comprise also a housing which can contain said magazine in a two-tier manner, wherein: said housing is provided, in its inside, with an accessor comprising a picker unit for holding said cartridge at the time of conveying said cartridge between said magazine and a drive device for writing data into and reading data from said cartridge, and comprising also a base unit for moving said picker unit in the direction of insertion and drawing of said magazine and in the direction of tier arrangement; said magazine has a step member where a step is formed along the direction of insertion and drawing; said housing has a locking member comprising a stopper part, which is disposed between said magazine and said accessor in a rotatable manner and positioned to abut the step of said step member, and a releasing part which is positioned in a moving area of said accessor in the direction of insertion and drawing of said magazine, and said housing has also a biasing member for biasing said stopper part of said locking member in the direction of said step member; locking of said magazine is released by releasing said stopper part's abutting said step member of said magazine; and, in accordance with movement of said picker and base units in the direction of drawing said magazine and movement of said picker unit in the direction of magazine-tier arrangement, unlocking of said magazine contained in the upper tier, that of said magazine contained in the lower tier or that of both of said magazines contained respectively in the upper and lower tiers is performed.