Patent ID: 7048127

Claim:
A lid unit for closing an opening of a container body for transport of thin plates housed therein, said lid unit having a four-sided shape and comprising: a pair of attaching/detaching mechanisms respectively located at the center of each of opposing sides of the lid unit, each of said attaching/detaching mechanisms comprising: a locking plate mounted for sliding and pivoting movements relative to a body portion of the lid unit; a drive-out member, mounted for rotation relative to said body portion about a central axis, for driving said locking plate, with sliding and pivoting movement, to an extended position for locking the lid unit to the container body and for retracting said locking plate, with sliding and pivoting movement, to a retracted position at which the lid unit is unlocked from the container body; and a locking arm integral with and extending from said drive out member in the direction of rotation in one direction, said locking arm, having an indentation for receiving therein one stationary element extending from said body portion, thereby fixing the drive member against rotation.