The invention relates to a device for locking and unlocking the jalousie (12, 15) of a container (10) which can be introduced into a frame (11) and can be withdrawn therefrom. The jalousie (12, 15) is displaced by a stationary journal (14) engaging therewith when introducing the container (10), said jalousie being displaced when withdrawing the container (10) from the frame (11) with the same engagement of the journal (14). In the closed position, the jalousie (12, 15) can be locked in a reliable and precise manner. Two locking pins (21, 22) that can be actuated by means of cam bars (35, 36) extending in the longitudinal direction of the frame are provided on the frame (11). The first locking pin (21) is used to lock the jalousie (12, 15), the second locking pin (22) holds the jalousie (12, 15) during locking by the first locking pin (21) in the precisely defined closing position. As a result, erroneous positions of the jalousie (12, 15) are prevented when locking and unlocking.