System for closing and opening at least one leaf of an inward swinging door

A system for closing and opening a leaf (1) of an inward swinging door for a passenger transport vehicle, the system comprising:

• a lever (2) which is rotatable on a horizontal plane about a first end (2a) on a point fixed to the vehicle, and which describes alternate angular opening and closing movements of the leaf towards and from an inside of the vehicle, respectively, a second end (2b) of the lever (2) being articulately joined to a first sector of an upper edge (6) of the leaf (1);
• a horizontal guide (3), located above the upper edge (6) of the leaf, through which a carriage (4) slides in a rectilinear and alternate back-and-forth movement for closing and opening the leaf, said guide (3) being integral to a longitudinal support (7) mounted in a lintel of the housing compartment for the door provided in a body of the vehicle;
• and
• push-pull means (10,11) comprising an articulated joint that links a second sector of the upper edge (6) to the carriage (4), arranged such that when the leaf (1) rotates between two end resting positions that correspond to opening and closing positions of the leaf, due to the effect of the lever (2), said push-pull means (10,11) forces said second sector of the upper edge (6) of the leaf (1) to move in a guided path during the opening and closing of the leaf,
• the lever (2) and push-pull means (10,11) being arranged such that when the leaf (1) is in the end opening position, a vertical plane that makes up the leaf (1) is substantially perpendicular to a vertical plane that defines the housing compartment for the door
• the system further comprising actuation means (12) simultaneously linked to the lever (2) and the carriage (4), which are adapted to distribute action on the lever (2) and the carriage (4) depending on a force required to open and close the leaf (1), such that the actuation means (12) are adapted to act on the carriage (4) during the opening and closing of the leaf (1), automatically distributing action on the lever (2) when additional power is required to move the carriage (4), during an initial opening operation of the leaf (1) from the end closing position, and during the closing and locking operation of the leaf (1) from an imminent closing position;
• and
• wherein the actuation means comprises an electric motor (12) coupled to said longitudinal support (7), a rotor (12a) and a stator (12b) of which are arranged to be able to rotate mutually with each other;
• the rotor (12a) coupled to a first transmission mechanism (13) that promotes the alternate back-and-forth movement of the carriage (4) to open and close the leaf (1) while the lever (2) is driven;
• and the stator (12b) coupled to a second transmission mechanism (18) that promotes rotation of the lever (2) while the carriage (4) is driven, such that the stator (12b) rotates when the rotor (12a) brakes and is not able to transmit to the carriage (4) the force required to lock or unlock the leaf (1) in the closing position.