The invention relates to a closure or concealment device (2) for a construction, this device (2) comprises a plurality of portions (3; 3 '), which are articulated in pairs, including a final portion (3). which is intended to be positioned at least near a threshold of an opening of a construction equipped with such a device (2). This device (2) is characterized in that, on the one hand, it comprises motorized drive means (4) for driving this device (2) in movement between an open position and a closed or closed position. occultation and, on the other hand, the final portion (3) comprises at least one cavity (31) which comprises, internally, at least part of the motorized drive means (4). This device (2) can also include a detection system for detecting an obstacle in the path of this device (2). The invention also relates to a closure or concealment installation (1) for a construction, this installation (1) comprises such a closure or concealment device (2).
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