Search

EP-4735370-A1 - METHOD AND CONTROL SYSTEM FOR OPENING AND/OR CLOSING A CAR DOOR OF AN ELEVATOR CAR AND A HOISTWAY DOOR OF THE ELEVATOR SYSTEM

EP4735370A1EP 4735370 A1EP4735370 A1EP 4735370A1EP-4735370-A1

Abstract

An elevator system (1) is described. The elevator system comprises: an elevator car (5) which is disposed for vertical movement in an elevator hoistway (3) of a building and which has a car door opening (6) for entering or exiting the elevator car (5) and a car door (7) for opening or closing the car door opening (6); a car door drive (8) which is mechanically coupled to the car door (7); a car door control unit (14) which is communicatively coupled to the car door drive (8); a hoistway door (11) which is disposed at a hoistway door opening (9) of the elevator hoistway (3) on a floor (10) of the building and which is designed to open or close the hoistway door opening (9); a hoistway door drive (13) which is mechanically coupled to the hoistway door (11); a hoistway door control unit (19) which is communicatively coupled to the hoistway door drive (13), the car door (7) or the hoistway door (11) being a leader door, the corresponding control unit being a leader control unit and the corresponding door drive being a leader door drive; and the other of the two doors being a follower door, the other of the two control units being a follower control unit and the other of the two door drives being a follower door drive; a transmitter (15) for generating a position signal, which transmitter is disposed on the leader door and faces the follower door; a receiver (17) for receiving the position signal, which receiver is disposed on the follower door, is communicatively coupled to the follower control unit and faces the leader door; the leader control unit being designed to generate, according to a predefined leader door travel curve, a leader control signal for the leader door drive for opening or closing the leader door, after the elevator car (5) has arrived at the floor (10), and the follower control unit being designed to generate, according to the received position signal, a follower control signal for the follower door drive for opening or closing the follower door, such that the follower door follows the leader door as the leader door moves.

Inventors

  • Bonomi, Pietro

Assignees

  • INVENTIO AG

Dates

Publication Date
20260506
Application Date
20240620

Claims (15)

  1. 1. Method for opening and/or closing a car door (7) of an elevator car (5) and a shaft door (11) of an elevator system (1), wherein the elevator car (5) is arranged vertically displaceably in an elevator shaft (3) of a building and has a car door opening (6) for entering or leaving the elevator car (5) and a car door (7) for opening or closing the car door opening (6), wherein the shaft door (11) is arranged on a floor (10) of the building at a shaft door opening (9) of the elevator shaft (3) and is designed to open or close the shaft door opening (9), and wherein the car door (7) or the shaft door (11) is designed as a guide door and the other of the two doors is designed as a follower door, the method comprising: Generating a guide control signal for opening or closing the guide door depending on a predetermined guide door travel curve after the elevator car (5) has arrived at the floor (10); Generating a position signal by means of a transmitter (15) arranged on the guide door; Receiving the position signal by means of a receiver (17) arranged on the follower door; and Generating a follower control signal to open or close the follower door depending on the received position signal, so that when the leading door moves, the follower door follows the leading door.
  2. 2. Method according to claim 1, wherein the follower control signal is generated such that a displacement of the follower door relative to the guide door in the direction of movement (25) of the two doors is minimized.
  3. 3. A method according to any one of claims 1 or 2, wherein the follower control signal is generated so as to maximize the signal strength of the received position signal.
  4. 4. Method according to one of claims 1 to 3, wherein the follower control signal is generated depending on a predetermined follower door travel curve.
  5. 5. The method according to claim 4, wherein the predetermined follower door travel curve is adapted depending on the received position signal.
  6. 6. Control system for opening and/or closing a car door (7) of an elevator car (5) and a shaft door (11) of an elevator installation (1), wherein the elevator car (5) is arranged vertically displaceably in an elevator shaft (3) of a building, and has a car door opening (6) for entering or leaving the elevator car (5) and a car door (7) for opening or closing the car door opening (6), and wherein the shaft door (11) is arranged on a floor (10) of the building at a shaft door opening (9) of the elevator shaft (3) and is designed to open or close the shaft door opening (9), the control system comprising: - a cabin door control unit (14) for controlling a cabin door drive (8) for opening or closing the cabin door (7), wherein the cabin door drive (8) is mechanically coupled to the cabin door (7); and - a shaft door control unit (19) for controlling a shaft door drive (13) for opening or closing the shaft door (11), wherein the shaft door drive (13) is mechanically coupled to the shaft door (11), wherein the car door (7) or the shaft door (11) is designed as a guide door and the other of the two doors is designed as a follower door and accordingly the car door control unit (14) or the shaft door control unit (19) is designed as a guide control unit and the other of the two control units is designed as a follower control unit, the guide control unit is designed to generate a guide control signal for opening depending on a predetermined guide door travel curve or closing the guide door after the elevator car (5) has arrived at the floor (10), and the follower control unit is designed to generate a follower control signal for the follower door drive for opening or closing the follower door depending on a position signal which is generated by a transmitter (15) to be arranged on the guide door and is received by a receiver (17) which is communicatively coupled to the follower control unit and which is to be arranged on the follower door, such that when the guide door moves, the follower door follows the guide door.
  7. 7. Control system according to claim 6, wherein the follower control signal is generated such that a displacement of the follower door relative to the guide door in the direction of movement (25) of the two doors is minimized.
  8. 8. A control system according to any one of claims 6 or 7, wherein the follower control signal is generated so as to maximize the signal strength of the received position signal.
  9. 9. Control system according to one of claims 6 to 8, wherein the follower control unit is designed to generate the follower control signal depending on a predetermined follower door travel curve and/or to adapt the predetermined follower door travel curve depending on the received position signal.
  10. 10. Elevator installation (1), comprising: - a control system according to one of claims 6 to 9, - the elevator car (5) which is arranged to be vertically displaceable in the elevator shaft (3) of the building, which has the car door opening (6) for entering or leaving the elevator car (5) and which has the car door (7) for opening or closing the car door opening (6); - the cabin door drive (8), which is mechanically coupled to the cabin door (7); - TI - - the shaft door (11) which is arranged on a floor (10) of the building at a shaft door opening (9) of the elevator shaft (3) and which is designed to open or close the shaft door opening (9); - a shaft door drive (13) which is mechanically coupled to the shaft door (11); wherein the car door control unit (14) is communicatively coupled to the car door drive (8); and the shaft door control unit (19) is communicatively coupled to the shaft door drive (13), and wherein the car door (7) or the shaft door (11) is designed as a guide door, the corresponding control unit as a guide control unit and the corresponding door drive as a guide door drive and wherein the other of the two doors is designed as a follower door, the other of the two control units as a follower control unit and the other of the two door drives as a follower door drive; - the transmitter (15) for generating a position signal, which is arranged on the leading door and faces the following door; - the receiver (17) for receiving the position signal, which is arranged on the follower door, which faces the guide door and which is communicatively coupled to the follower control unit.
  11. 11. Elevator installation (1) according to claim 10, wherein the transmitter (15) is arranged on the leading door and the receiver (17) is arranged on the following door such that a signal strength of the received position signal is maximum when a displacement of the following door relative to the leading door in the direction of movement (25) of the following door is minimal.
  12. 12. Elevator installation (1) according to claim 10, wherein the follower control unit is designed to generate the follower control signal such that a displacement of the follower door relative to the guide door in the direction of movement (25) of the two doors is minimized.
  13. 13. Elevator installation (1) according to claims 11 and 12, wherein the follower control unit is designed to generate the follower control signal such that the signal strength of the received position signal is maximized.
  14. 14. Elevator installation (1) according to claims 10 and 13, wherein the follower control unit is designed to generate the follower control signal depending on a predetermined follower door travel curve.
  15. 15. Elevator installation (1) according to claim 14, wherein the follower control unit is designed to determine the predetermined To adjust the following door travel curve depending on the received position signal.

Description

METHOD AND CONTROL SYSTEM FOR OPENING AND/OR CLOSING A CABIN DOOR OF AN ELEVATOR CABIN AND A SHAFT DOOR OF THE ELEVATOR SYSTEM Description The present invention relates to an elevator system. Furthermore, the invention relates to a method and a control system for opening and/or closing a car door of an elevator car and a shaft door of the elevator system. In elevator systems, at least one elevator car can typically be moved in an elevator shaft between height levels of different floors in a building. In a frequently used elevator type, the elevator car is held by a rope-like support element. By moving the rope-like support element, the elevator car can be moved vertically within the elevator shaft. For this purpose, the support elements generally run over a traction sheave, which can be driven in rotation by a drive machine. Such an elevator car has a car door opening through which the elevator car can be entered and/or exited, and at least one car door for closing or opening the car door opening. The car doors of elevator cars are usually designed as sliding doors, for example as telescopic sliding doors. Optionally, the elevator car can have two car doors that move towards each other during the closing process and away from each other during the opening process. The elevator car also has a car door drive that is provided for moving the car door. Depending on the number of floors to be reached by the elevator car, the elevator shaft has two or more shaft door openings arranged one above the other, each of which has at least one shaft door. If the elevator car has two car doors, two shaft doors can be arranged at each of the shaft door openings. If the elevator car stops at the corresponding shaft door on one of the floors, the Car door mechanically coupled to the shaft door. After coupling, both the car door and the shaft door can be opened and closed again by the car door drive. Alternatively, it is possible to open or close both the car door and the shaft door using a specially designed active door drive. With this variant, a mechanical coupling that transfers the car door movement caused by the car door drive to the shaft door is no longer necessary. Nevertheless, in normal operation it must be ensured that both the car door and the shaft door can only perform an opening movement if the car door is at the same height as the shaft door in order to ensure the safety of the elevator system. Furthermore, it is advantageous to ensure that the car door and the shaft door can be opened and closed in a coordinated manner, i.e. in particular synchronously. WO 2022/228959 A1 describes an elevator system with an elevator car that can be moved in an elevator shaft, a car door arranged on the elevator car, a car door drive for closing and/or opening the car door, at least one shaft door arranged on a door opening of the elevator shaft, a shaft door drive for closing and/or opening the shaft door, a car door control unit by means of which the car door drive can be directly controlled, and a shaft door control unit by means of which the shaft door drive can be directly controlled. The car door control unit and the shaft door control unit are connected to one another via a communications connection, preferably wirelessly, so that synchronous opening and/or closing of the shaft door and the car door is possible. Exact positions of the shaft door or the car door can be determined by means of an encoder that is coupled to the respective door drive. The encoder generates a position signal that is representative of the state of the respective door drive and that can be used to determine the position of the respective door. This can already produce very good results. However, in some situations and/or elevator systems, even more precise coordination of the door opening and closing movement is desired. Therefore, there may be a need for an elevator system in which a car door and corresponding shaft doors can be opened and closed as synchronously and/or uniformly as possible. There may also be a need for a method and a Control systems for opening and/or closing the car door and the shaft door must exist to ensure that the car door and a corresponding shaft door can be opened and closed as synchronously and/or uniformly as possible. Such a need can be met by the subject matter according to one of the independent claims. Advantageous embodiments are defined in the dependent claims and the following description. According to a first aspect of the invention, a method for opening and/or closing a car door of an elevator car and a shaft door of an elevator system is described. The elevator car is arranged in a vertically displaceable manner in an elevator shaft of a building and has a car door opening for entering or leaving the elevator car and a car door for opening or closing the car door opening. The shaft door is arranged on a floor of the building at a shaft door opening of the elevator shaft and is designed to open or close