Lift cages are provided which include a crosspiece which houses drive mechanisms, an access aperture and two cage doors which are operatively connected to a first motor element which moves the cage doors from an open position to a closed position. Such cage doors may include a second motor element mechanically and operatively separate from the first motor element, wherein said second motor element is connected to a blocking/releasing carriage of the cage doors. The blocking/releasing carriage may be connected to at least one chute connected to at least one of said cage doors, so as to permit the blocking/releasing of the chutes independently of the actuation of the first motor element and of the cage doors.

The invention relates to a door drive device for opening and closing corresponding elevator door leaves of elevator doors. The door drive device may have a first driver actins upon a first coupling element arranged on a first elevator door leaf to open a first elevator door leaf of a first elevator door, and a second driver acting upon a second coupling element arranged on a first elevator door leaf to close the first elevator door leaf. The first and second drivers can be displaced by a drive unit in an opening direction and a closing direction of the first elevator door. The drive unit may have a first drive for displacing the first driver and a second drive for displacing the second driver, and the first and second drivers can be displaced independently of one another in the opening direction and in the closing direction by the drive unit.

An elevator door system has a shaft door, a car door, a car door drive and a door coupling that couples the car door to the shaft door. An electrically activated car door lock, locks and unlocks the car door in a closed position. The door coupling includes a contact body with a length dimension greater than a spacing between a pair of guide webs and a width dimension smaller than the guide web spacing. The contact body is arranged rotatably on the car door between the guide webs and a lever is connected to a drive means and rotationally to the contact body, the contact body being rotated by a movement of the drive means from a decoupled position, in which the contact body is arranged with play between the guide webs due to the width dimension, into a coupling position, in which the contact body touches the guide webs.