Method and arrangement for closing doors of an elevator of a multi-car elevator shaft system

An arrangement for closing doors of an elevator that comprises:

• at least an elevator shaft;
• a plurality of cars, each of which is
• configured to run along guide rails in the elevator shaft, and
• equipped with a car door;
• a plurality of landing doors, the plurality of landing doors including a landing door at each of a plurality of landings;
• a hoisting machinery;
• a roping system;
• shaft equipment;
• and
• a control system configured to,
• control the activities of the elevator,
• monitor and analyze a door open time of a car door of a first car, from among the plurality of cars,
• the first car being a car stopped at a landing ahead of one or more other cars from among the plurality of cars, and
• if a duration of the door open time will result in a stopped state of the first car interrupting a motion of at least a next car behind the first car,
• accelerate closure of the car door of the first car, and
• generate a sound to inform passengers of the accelerated closure,
• wherein the arrangement further includes a safety element, and
• wherein the control system is further configured to,
• detect passengers inside the stopped first car, and
• when a door failure in which the car door of the first car does not close occurs, and at least one passenger is detected in the first car,
• close a car door opening of the first car with the safety element, and
• move the first car away from the landing at which the first car was stopped, after closing the car door opening of the first car with the safety element.