| 摘要 |
Various types of recording cartridges, each of which has a case which rotatably accommodates a reel on which a recording tape is wound, are provided with grasped portions with concave portions at side walls of the case and which a grasping device of a same, external library with accommodating chambers can grasp from both sides. A height from a floor surface of the accommodating chamber to the grasped portions when the cartridge is accommodated in the accommodating chamber of the library is made to be the same regardless of a type of the recording tape cartridge, and an interval between a pair of corner portions of the grasped portions, which corner portions are near a removal opening of the library, are made to be the same regardless of the cartridge type. A pair of corner portions of the grasped portions, which corner portions are deeper in the library, are chamfered.
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