Abstract: An accessor device for a tape library has two accessor bases movably mounted on two parallel guide rails extending along a plurality of cells housing tapes. The accessor bases have, on respective confronting portions thereof, overlapping edges which overlap each other in a direction normal to the longitudinal direction of the guide rails when the accessor bases move toward each other. The accessor device mounted on the two parallel guide rails is prevented from falling, and the accessor devices with the overlapping edges has a wide accessible area for accessing endmost regions in the tape library.

Abstract: There is provided a medium library apparatus including a plurality of cells each of which has an opening and into which a medium is loaded through the opening, each one of the cells having oppositely located first and second walls each having an outward inclination that a spacing between the first and second walls increases towards the opening, a handling device for loading the medium into and taking the medium out of the cell, the handling device including a projection for pushing the medium having been loaded in one of the cells towards a rear surface of the cell located oppositely to the opening to thereby rotate the medium in the cell so as to release the medium from latch means, a leaf spring for pushing the medium from one of the first and second walls towards the other when the medium has been loaded into one of the cells, a latch for latching the medium to the other of the first and second walls when the leaf spring causes the medium to make contact with the other of the first and second walls, and an