Recording tape cartridge storage case and storage case containing recording tape cartridges

A recording tape cartridge storage case comprising:

• a case body made of resin having a bottom plate that is rectangular in a bottom view and a peripheral wall erected from a peripheral edge of the bottom plate, a plurality of recording tape cartridges being stored in at least two rows with label areas thereof directed upward, respectively, and a bottom rib interposed between mutually adjacent side surfaces of the recording tape cartridges that form the rows on the bottom plate;
• and
• a lid member made of resin that is attached to an upper end of the peripheral wall, seals the case body, and has a top rib interposed between the side surfaces, transmission parts that are transparent flat surfaces being formed in portions that face the label areas on both sides of the top rib;
• wherein protruding ribs, which protrude toward the side surfaces of the recording tape cartridges that form the rows, are formed on mutually facing portions of the peripheral wall;
• the lid member comprises restricting parts that restrict a position of another case body stacked thereon;
• the case body comprises an engaging part of which a position is restricted by the restricting parts in another said lid member;
• a lower surface of the engaging part is configured so as not to protrude downward from a lower surface of the bottom plate;
• a respective protruding strip part extending along each peripheral edge of the lid member,
• each respective protruding strip part being formed at the peripheral edge of the lid member excluding a corner part of the peripheral edge, and
• each restricting part is an end surface of one respective protruding strip part that faces a longitudinal direction of the protruding strip part;
• and
• each protruding strip part has a substantially right-angled triangle shape in side view.