System for automatic and remote closure and opening of a door designed for access to an aircraft fuselage, automatic closure method and automatic opening method

A system for automatic and remote closure and opening of a door designed for an access opening of an aircraft (AC) fuselage, the door comprising a leaf, a frame delimiting the access opening and an articulation arm, the frame being secured integrally on the fuselage and having two uprights, the leaf configured to be alternately in a closed position, when the leaf closes the access opening, and an open position, when the leaf leaves the access opening open, with the articulation arm comprising a first end articulated on the leaf, and a second end articulated on the frame, such that the leaf remains parallel to itself when the leaf changes from the open position to the closed position and from the closed position to the open position, the door also comprising a locking mechanism which is configured alternately to lock and unlock the leaf when the leaf is in the closed position, the locking mechanism comprising a locking lever, an end of which is fitted such as to rotate on the leaf around an axis of rotation perpendicular to the leaf, the locking lever being configured to be alternately in a locking position, in which the locking mechanism locks the leaf, and an unlocking position, in which the locking mechanism does not lock the leaf, the system comprising:

• a support designed to be secured integrally on the fuselage;
• an elongate structure having a longitudinal axis, the elongate structure connected with a slide connector on the support, such that the elongate structure is configured to be displaced relative to the support along a longitudinal axis perpendicularly to the two uprights of the frame, the slide connection being configured such that the elongate structure is configured to alternately be in an extended position in which the elongate structure is facing the access opening, and in a retracted position of the elongate structure, in which the elongate structure is not opposite the access opening;
• a locking and unlocking device fitted on the elongate structure, the locking and unlocking device configured to bring the locking lever alternately into the unlocking position, for unlocking of the leaf when the elongate structure is in the extended position, and into the locking position for locking of the leaf when the elongate structure is in the extended position;
• a closure and opening device fitted on the elongate structure, the closure and opening device configured alternately to thrust the articulation arm in order to bring the leaf towards the open position, when the elongate structure is in the extended position, and to catch on the articulation arm, then to draw the articulation arm in order to bring the leaf towards the closed position, when the elongate structure is in the extended position;
• and,
• a control device configured to transmit orders to command closure or opening of the leaf to the closure and opening device, and orders to command locking or unlocking to the locking and unlocking device, according to command orders transmitted remotely to the control device by a user.