WO2024170053A1 - Elevator system and method for optimizing advanced door opening - Google Patents

Elevator system and method for optimizing advanced door opening Download PDF

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Publication number
WO2024170053A1
WO2024170053A1 PCT/EP2023/053492 EP2023053492W WO2024170053A1 WO 2024170053 A1 WO2024170053 A1 WO 2024170053A1 EP 2023053492 W EP2023053492 W EP 2023053492W WO 2024170053 A1 WO2024170053 A1 WO 2024170053A1
Authority
WO
WIPO (PCT)
Prior art keywords
door
car
landing
elevator
opening
Prior art date
Application number
PCT/EP2023/053492
Other languages
French (fr)
Inventor
Juha-Matti Aitamurto
Lars BRÖGELMANN
Original Assignee
Kone Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kone Corporation filed Critical Kone Corporation
Priority to PCT/EP2023/053492 priority Critical patent/WO2024170053A1/en
Publication of WO2024170053A1 publication Critical patent/WO2024170053A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
    • B66B13/02—Door or gate operation
    • B66B13/14—Control systems or devices
    • B66B13/143—Control systems or devices electrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
    • B66B13/02—Door or gate operation
    • B66B13/14—Control systems or devices
    • B66B13/143—Control systems or devices electrical
    • B66B13/146—Control systems or devices electrical method or algorithm for controlling doors

Definitions

  • the invention relates to advance door opening of an elevator.
  • the elevator is preferably an elevator for transporting passengers and/or goods.
  • An elevator may comprise an elevator car and a hoisting machine operable to drive the car in an elevator shaft, to transfer passengers and/or cargo between landing floors.
  • the elevator car may be provided with a door operator, i.e. an electrically controllable actuator, that drives an elevator car leave or car leaves to open and close the car door.
  • the car door may be operably connected to an adjacent landing door by means of a door coupler, such that as the door operator drives the car door leaves, the landing door opens or closes also, to enable entering the car or exiting the car to the landing floor.
  • elevators may be provided with an advance door opening function, the ADO function.
  • This ADO function allows the car door/landing door to start opening by means of the door operator before the car is fully stopped on the landing. Doors start opening when the car is at a predetermined distance from the landing, also referred to as the ADO starting point.
  • the objective of the invention is to solve one or more of the aforementioned problems by introducing a new elevator system.
  • the invention provides solutions relating to problems associated with accuracy in door opening of an elevator.
  • the invention provides solutions relating to preventing formation of a dangerous vertical step between car floor and landing floor, when the advance door opening function, the ADO function is enabled.
  • the elevator system according to the invention is defined in claim 1 .
  • the elevator system comprises an elevator shaft; one or more landings provided with landing floors; an elevator car comprising a car door and a car floor and adapted to transfer passengers and/or cargo in the elevator shaft; and a hoisting machine operable to drive the elevator car.
  • the elevator system comprises a positioning system, which can measure position of the car in the shaft.
  • the positioning system comprises at least one door zone sensor, providing absolute position of the car within a door zone or in the vicinity of each landing floor.
  • the at least one door zone sensor preferably also indicates elevator car position in a situation when the car floor is exactly at the same level with the landing floor, such that there is no vertical step therebetween.
  • the positioning system may also comprise an encoder, such as a hoisting machine motor encoder or a car encoder, that measures position of the car elsewhere in the shaft, between the landing floors.
  • Other position measurement devices are applicable also, such as optically or magnetically readable tapes extending in the shaft along the trajectory of the elevator car.
  • the elevator system comprises one or more controllers for controlling elevator operation.
  • controllers may include an elevator control unit, a door operator control unit, and a frequency converter, for example.
  • the frequency converter supplies electrical power to the hoisting machine based on control commands from the elevator control unit. Consequently, the hoisting machine drives the car smoothly between the landing floors and according to a predetermined speed profile, to implement the service requests received from elevator passengers.
  • the elevator system comprises a door operator that opens or closes an elevator car door in combination with an adjacent landing door.
  • the elevator system comprises an advance door opening, ADO function.
  • ADO advance door opening
  • the door operator starts early opening the car door/landing door combination, when the car approaching a destination landing has arrived at an ADO starting point at the proximity of the adjacent landing floor.
  • the door operator starts to drive the car door leaves according to a predefined motion profile, such that the car door/landing door combination starts to open.
  • door operators may be located in the landings, such that each landing door has a door operator of its own.
  • the door operator comprises a belt drive, which comprises a drive motor, that drives a belt operably coupled to the door leaves.
  • the elevator car comprises a door sensor, that indicates a closed/open status of the car door/adjacent landing door combination.
  • the door sensor may be a limit switch or a contact changing its state, when opening of the car door/adjacent landing combination has advanced to a predefined point.
  • a gap e.g. 500 mm enabling entering/exiting the car.
  • door sensor may be e.g. an encoder, which measures movement of the door leaves or rotation of the door drive motor.
  • a door operator control unit receives a door opening request from the elevator control unit, when the elevator car has arrived at the ADO starting point in elevator shaft. At that moment of time door operator starts opening the doors, as disclosed above.
  • the door operator control unit sends an indication of this door status change to the elevator control unit.
  • Elevator control unit records elevator car position at the moment of said status change. Elevator control unit compares the recorded position to a predetermined value range, that is representative of an allowable momentary step, i.e. position difference between the landing floor and the car floor.
  • elevator control unit adjusts the ADO starting point such, that door opening starts a bit later for that particular landing (i.e. a bit closer to the particular landing floor).
  • elevator control unit may request the door operator control unit to adjust motion profile of car door leaves, such that doors open a bit slower.
  • the ADO starting point may be adjusted further away from the landing floor, such that door opening starts a bit earlier for that landing. This way door opening may be started a bit earlier and passengers may enter/exit the car earlier to reduce elevator waiting times for that floor.
  • elevator control unit may request the door operator control unit to adjust motion profile of car door leaves, such that doors open a bit faster.
  • the method for optimizing elevator advanced door opening in the elevator system comprises: obtaining information from the positioning system and from the door sensor by the controller; generating a door opening request for the door operator by the controller, when the elevator car has arrived at an ADO starting point; and adjusting the ADO starting point for the particular landing, if the elevator car position deviates from a predetermined value range at the time when the opening of the car door/adjacent landing door combination has advanced to the predefined point.
  • the inventors have found that the door opening distance during advanced door opening can be optimized to prevent tripping hazard. Too high door sill gap may present the tripping hazard for the passengers. Increasing the door opening distance may have positive effect on overall system performance and especially door to door time.
  • the elevator system and the method may remove or at least reduces the need for ADO adjustments since the arrangement comprises a built-in automatic optimal door opening position learning procedure for each landing.
  • Figure 1 shows an elevator system provided with doors
  • FIG. 2 shows a block diagram of some elements of the elevator system.
  • FIG. 1 schematically illustrates some aspects of an elevator system 100 provided with doors 11 , 31 .
  • An elevator car 10 may be moved in the vertical direction within an elevator shaft 1.
  • the car 10 is provided with a car door 11 and a car floor 12.
  • the car door 11 comprises a door that may be moved between a closed position and an open position.
  • the car door 11 may be kept locked while the car 10 is moving, unlocked upon the car 10 entering a landing zone located at and close to a landing 30 provided with a landing floor 32 and opened upon the car 10 stopping at the landing 30.
  • the car door 11 may be closed before the car 10 leaves the landing 30 and locked upon the car 10 exiting the landing zone.
  • the car 10 is provided with a door operator 13 connected to the car door 11 for temporarily coupling the car door 11 to a landing door 31 provided at each landing 30 when the car 10 resides within the landing zone of the landing 30 such that the landing door 31 moves between a closed position and an open position together with the car door 11 , thereby allowing passengers to move between the landing floor 32 and the car 10 when the car 10 is at the landing 30 while preventing the passengers from entering the shaft 1 when the elevator car 10 is not at the landing 30.
  • the elevator system comprises the shaft 1 ; one or more landings 30 provided with landing floors 32; the elevator car 10 provided with the car door 11 and the car floor 12, adapted to transfer passengers and/or cargo in the shaft; a hoisting machine 5 operable to drive the elevator car; a positioning system 20 configured to provide an indication of an elevator car position in the shaft; and the door operator 13 configured to open or close the car door 11 in combination with the adjacent landing door 31 provided at each landing 30.
  • FIG. 2 shows a block diagram of some elements of the elevator system.
  • the elevator system further comprises an advance door opening ADO function 40; a door sensor 14 indicating that an opening of the car door/adjacent landing door combination 11/31 has advanced to a predefined point; a controller 50 configured: to obtain information from the positioning system 20; to obtain information from the door sensor 14; to generate a door opening request for the door operator 13, when the elevator car 10 approaching a destination landing 30 has arrived at an ADO starting point; and to adjust the ADO starting point for the particular landing 30, if the elevator car position deviates from a predetermined value range at the time when the opening of the car door/adjacent landing door combination 11/31 has advanced to the predefined point.
  • a method for optimizing elevator advanced door opening in the elevator system 100 comprises obtaining information from the positioning system 20 and from the door sensor 14 by the controller 50; generating a door opening request for the door operator 13 by the controller 50, when the elevator car 10 has arrived at an ADO starting point; and adjusting the ADO starting point for the particular landing 30, if the elevator car position deviates from a predetermined value range at the time when the opening of the car door/adjacent landing door combination 11/31 has advanced to the predefined point.
  • the elevator system may comprise one or more controllers for controlling elevator operation. These controllers may include an elevator control unit, a door operator control unit, and a frequency converter, for example.
  • the frequency converter supplies electrical power to the hoisting machine 5 based on control commands from the elevator control unit. Consequently, the hoisting machine drives the car 10 smoothly between the landing floors 32 and according to a predetermined speed profile, to implement the service requests received from elevator passengers.
  • the ADO starting point is a parameter.
  • the door operator 13 when the door reaches e.g. 500 mm open position, the door operator 13 sends a signal for the controller 50.
  • the controller 50 receives the car position at landing 30 and compares the car position at landing to a pre-determined “optimized sill gap” parameter value. According to an embodiment no adjustment is made if no discrepancy is detected.
  • the controller 50 sets door opening to start a bit later for that particular landing.
  • the controller 50 sets door opening to start a bit earlier for that particular landing.
  • the positioning system 20 comprises door zone sensors 21 , providing absolute position of the elevator car 10 within a door zone of each landing 30 or landing floor 32, such that there is no vertical step therebetween.
  • the door zone sensor 21 is configured to indicate the elevator car position in a situation when the car floor 12 is exactly at the same level with the landing floor.
  • the positioning system comprises an encoder, such as a hoisting machine encoder or a car encoder, that measures position of the car 10 in the shaft 1 between the landings 30.
  • an encoder such as a hoisting machine encoder or a car encoder
  • the positioning system 20 comprises an optically or magnetically readable tape extending in the shaft 1 along the trajectory of the elevator car.
  • the door operator 13 is located in the elevator car.
  • door operators 13 are located in the landings 30, such that each landing door 31 has a door operator of its own.
  • the door operator 13 comprises a belt drive that drives a belt operably coupled to the door leaves.
  • the door sensor 14 comprises a limit switch or a contact changing its state, when opening of the car door/adjacent landing door combination 11/31 has advanced to the predefined point.
  • the door sensor comprises a contact changing its state, when opening of the car door/adjacent landing door combination has advanced to the predefined point.
  • the door sensor 14 is located in the elevator car 10.
  • the door operator 13 starts early opening the car door/landing door combination 11/31 , when the car 10 has arrived at the ADO starting point.
  • the ADO starting point is located at the proximity of the adjacent landing floor 31 to the car floor 12.
  • the door operator 13 starts to drive the car door leaves such that the car door/landing door combination 11/31 starts to open.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Elevator Control (AREA)

Abstract

An elevator system comprising an elevator shaft (1); one or more landings (30) provided with landing floors (32); an elevator car (10) comprising a car door (11) and a car floor (12) and adapted to transfer passengers and/or cargo in the shaft; a hoisting machine (5) operable to drive the car; a positioning system (20) configured to provide an indication of a car position in the shaft; a door operator (13) configured to open or close the car door (11) in combination with an adjacent landing door (31); at least one door sensor (14) indicating that an opening of the car door/adjacent landing door combination (11/31) has advanced to a predefined point; a controller (50) configured to obtain information from the positioning system (20) and from the door sensor (14), and to generate a door opening request for the door operator (13), when the car (10) approaching a destination landing (30) has arrived at an ADO starting point; and to adjust the ADO starting point for the particular landing (30), if the car position deviates from a predetermined value range at the time when the opening of the car door/adjacent landing door combination (11/31) has advanced to the predefined point. A method for optimizing elevator advanced door opening.

Description

ELEVATOR SYSTEM AND METHOD FOR OPTIMIZING ADVANCED DOOR OPENING
FIELD OF THE INVENTION
The invention relates to advance door opening of an elevator. The elevator is preferably an elevator for transporting passengers and/or goods.
BACKGROUND OF THE INVENTION
An elevator may comprise an elevator car and a hoisting machine operable to drive the car in an elevator shaft, to transfer passengers and/or cargo between landing floors. The elevator car may be provided with a door operator, i.e. an electrically controllable actuator, that drives an elevator car leave or car leaves to open and close the car door. The car door may be operably connected to an adjacent landing door by means of a door coupler, such that as the door operator drives the car door leaves, the landing door opens or closes also, to enable entering the car or exiting the car to the landing floor.
To reduce elevator waiting times, elevators may be provided with an advance door opening function, the ADO function. This ADO function allows the car door/landing door to start opening by means of the door operator before the car is fully stopped on the landing. Doors start opening when the car is at a predetermined distance from the landing, also referred to as the ADO starting point.
Typically, it is considered that people can start to exit or enter the car when door status changes from closed to open. This happens when opening of the car door/landing door combination has advanced to a specified amount, such as when the door combination is at least 500 mm open. If the door opens early, there is at the time of the opening still a substantial difference between car floor and landing floor positions. This position difference causes a vertical step between the floors, which step may be dangerous for the passengers entering or exiting the car.
There is a need for accurate door opening of an elevator.
SUMMARY OF THE INVENTION
The objective of the invention is to solve one or more of the aforementioned problems by introducing a new elevator system. The invention provides solutions relating to problems associated with accuracy in door opening of an elevator. The invention provides solutions relating to preventing formation of a dangerous vertical step between car floor and landing floor, when the advance door opening function, the ADO function is enabled.
The elevator system according to the invention is defined in claim 1 .
The method for optimizing elevator advanced door opening is defined in claim 15.
Preferable further embodiments of the invention are introduced in the following and in the appended dependent claims, which further embodiments can be combined individually or in any combination.
The elevator system comprises an elevator shaft; one or more landings provided with landing floors; an elevator car comprising a car door and a car floor and adapted to transfer passengers and/or cargo in the elevator shaft; and a hoisting machine operable to drive the elevator car.
The elevator system comprises a positioning system, which can measure position of the car in the shaft. The positioning system comprises at least one door zone sensor, providing absolute position of the car within a door zone or in the vicinity of each landing floor. The at least one door zone sensor preferably also indicates elevator car position in a situation when the car floor is exactly at the same level with the landing floor, such that there is no vertical step therebetween. The positioning system may also comprise an encoder, such as a hoisting machine motor encoder or a car encoder, that measures position of the car elsewhere in the shaft, between the landing floors. Other position measurement devices are applicable also, such as optically or magnetically readable tapes extending in the shaft along the trajectory of the elevator car.
The elevator system comprises one or more controllers for controlling elevator operation. These controllers may include an elevator control unit, a door operator control unit, and a frequency converter, for example. The frequency converter supplies electrical power to the hoisting machine based on control commands from the elevator control unit. Consequently, the hoisting machine drives the car smoothly between the landing floors and according to a predetermined speed profile, to implement the service requests received from elevator passengers.
The elevator system comprises a door operator that opens or closes an elevator car door in combination with an adjacent landing door.
The elevator system comprises an advance door opening, ADO function. In the advance door opening the door operator starts early opening the car door/landing door combination, when the car approaching a destination landing has arrived at an ADO starting point at the proximity of the adjacent landing floor. At the moment of arrival of the elevator car at the ADO starting point the door operator starts to drive the car door leaves according to a predefined motion profile, such that the car door/landing door combination starts to open.
Alternatively to a location of the door operator in the elevator car, door operators may be located in the landings, such that each landing door has a door operator of its own.
According to an embodiment, the door operator comprises a belt drive, which comprises a drive motor, that drives a belt operably coupled to the door leaves.
The elevator car comprises a door sensor, that indicates a closed/open status of the car door/adjacent landing door combination. The door sensor may be a limit switch or a contact changing its state, when opening of the car door/adjacent landing combination has advanced to a predefined point. Preferably, at the time of change there is a gap of e.g. 500 mm enabling entering/exiting the car. Alternatively, door sensor may be e.g. an encoder, which measures movement of the door leaves or rotation of the door drive motor.
According to an embodiment a door operator control unit receives a door opening request from the elevator control unit, when the elevator car has arrived at the ADO starting point in elevator shaft. At that moment of time door operator starts opening the doors, as disclosed above. When opening of the car door/adjacent landing combination has advanced to a predefined point, the door operator control unit sends an indication of this door status change to the elevator control unit. Elevator control unit records elevator car position at the moment of said status change. Elevator control unit compares the recorded position to a predetermined value range, that is representative of an allowable momentary step, i.e. position difference between the landing floor and the car floor.
If the recorded car position is too far from the landing floor (i.e. too far from position of the car in a situation when the car floor is exactly at the same level with the landing floor), this means that said position difference may cause a dangerous vertical step between the car floor and the adjacent landing floor. In that case elevator control unit adjusts the ADO starting point such, that door opening starts a bit later for that particular landing (i.e. a bit closer to the particular landing floor). Alternatively or additionally, elevator control unit may request the door operator control unit to adjust motion profile of car door leaves, such that doors open a bit slower.
According to an embodiment, if said recorded car position is very close to the landing floor, this means that the car floor/landing floor position difference is very small, and the ADO starting point may be adjusted further away from the landing floor, such that door opening starts a bit earlier for that landing. This way door opening may be started a bit earlier and passengers may enter/exit the car earlier to reduce elevator waiting times for that floor.
According to an embodiment, alternatively or additionally, elevator control unit may request the door operator control unit to adjust motion profile of car door leaves, such that doors open a bit faster.
The method for optimizing elevator advanced door opening in the elevator system according to any of the embodiments described in this description comprises: obtaining information from the positioning system and from the door sensor by the controller; generating a door opening request for the door operator by the controller, when the elevator car has arrived at an ADO starting point; and adjusting the ADO starting point for the particular landing, if the elevator car position deviates from a predetermined value range at the time when the opening of the car door/adjacent landing door combination has advanced to the predefined point.
The inventors have found that the door opening distance during advanced door opening can be optimized to prevent tripping hazard. Too high door sill gap may present the tripping hazard for the passengers. Increasing the door opening distance may have positive effect on overall system performance and especially door to door time. The elevator system and the method may remove or at least reduces the need for ADO adjustments since the arrangement comprises a built-in automatic optimal door opening position learning procedure for each landing.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will in the following be described in greater detail by means of preferred embodiments with reference to the attached drawings, in which:
Figure 1 shows an elevator system provided with doors, and
Figure 2 shows a block diagram of some elements of the elevator system.
DETAILED DESCRIPTION
Figure 1 schematically illustrates some aspects of an elevator system 100 provided with doors 11 , 31 . An elevator car 10 may be moved in the vertical direction within an elevator shaft 1. The car 10 is provided with a car door 11 and a car floor 12. The car door 11 comprises a door that may be moved between a closed position and an open position. The car door 11 may be kept locked while the car 10 is moving, unlocked upon the car 10 entering a landing zone located at and close to a landing 30 provided with a landing floor 32 and opened upon the car 10 stopping at the landing 30. The car door 11 may be closed before the car 10 leaves the landing 30 and locked upon the car 10 exiting the landing zone. The car 10 is provided with a door operator 13 connected to the car door 11 for temporarily coupling the car door 11 to a landing door 31 provided at each landing 30 when the car 10 resides within the landing zone of the landing 30 such that the landing door 31 moves between a closed position and an open position together with the car door 11 , thereby allowing passengers to move between the landing floor 32 and the car 10 when the car 10 is at the landing 30 while preventing the passengers from entering the shaft 1 when the elevator car 10 is not at the landing 30.
The elevator system comprises the shaft 1 ; one or more landings 30 provided with landing floors 32; the elevator car 10 provided with the car door 11 and the car floor 12, adapted to transfer passengers and/or cargo in the shaft; a hoisting machine 5 operable to drive the elevator car; a positioning system 20 configured to provide an indication of an elevator car position in the shaft; and the door operator 13 configured to open or close the car door 11 in combination with the adjacent landing door 31 provided at each landing 30.
Figure 2 shows a block diagram of some elements of the elevator system.
The elevator system further comprises an advance door opening ADO function 40; a door sensor 14 indicating that an opening of the car door/adjacent landing door combination 11/31 has advanced to a predefined point; a controller 50 configured: to obtain information from the positioning system 20; to obtain information from the door sensor 14; to generate a door opening request for the door operator 13, when the elevator car 10 approaching a destination landing 30 has arrived at an ADO starting point; and to adjust the ADO starting point for the particular landing 30, if the elevator car position deviates from a predetermined value range at the time when the opening of the car door/adjacent landing door combination 11/31 has advanced to the predefined point.
A method for optimizing elevator advanced door opening in the elevator system 100 comprises obtaining information from the positioning system 20 and from the door sensor 14 by the controller 50; generating a door opening request for the door operator 13 by the controller 50, when the elevator car 10 has arrived at an ADO starting point; and adjusting the ADO starting point for the particular landing 30, if the elevator car position deviates from a predetermined value range at the time when the opening of the car door/adjacent landing door combination 11/31 has advanced to the predefined point.
The elevator system may comprise one or more controllers for controlling elevator operation. These controllers may include an elevator control unit, a door operator control unit, and a frequency converter, for example. The frequency converter supplies electrical power to the hoisting machine 5 based on control commands from the elevator control unit. Consequently, the hoisting machine drives the car 10 smoothly between the landing floors 32 and according to a predetermined speed profile, to implement the service requests received from elevator passengers.
According to an embodiment the ADO starting point is a parameter.
According to an embodiment, when the door reaches e.g. 500 mm open position, the door operator 13 sends a signal for the controller 50. According to an embodiment the controller 50 receives the car position at landing 30 and compares the car position at landing to a pre-determined “optimized sill gap” parameter value. According to an embodiment no adjustment is made if no discrepancy is detected.
According to an embodiment, in case the car floor position to landing floor is longer than defined in parameter “optimized sill gap” then the controller 50 sets door opening to start a bit later for that particular landing.
According to an embodiment, in case the car floor position to landing floor is shorter than defined in parameter “optimized sill gap” then the controller 50 sets door opening to start a bit earlier for that particular landing.
Eventually this will result for optimized ADO setting for each landing. According to an embodiment the positioning system 20 comprises door zone sensors 21 , providing absolute position of the elevator car 10 within a door zone of each landing 30 or landing floor 32, such that there is no vertical step therebetween.
According to an embodiment the door zone sensor 21 is configured to indicate the elevator car position in a situation when the car floor 12 is exactly at the same level with the landing floor.
According to an embodiment the positioning system comprises an encoder, such as a hoisting machine encoder or a car encoder, that measures position of the car 10 in the shaft 1 between the landings 30.
According to an embodiment the positioning system 20 comprises an optically or magnetically readable tape extending in the shaft 1 along the trajectory of the elevator car.
According to an embodiment the door operator 13 is located in the elevator car.
According to an embodiment door operators 13 are located in the landings 30, such that each landing door 31 has a door operator of its own.
According to an embodiment the door operator 13 comprises a belt drive that drives a belt operably coupled to the door leaves.
According to an embodiment the door sensor 14 comprises a limit switch or a contact changing its state, when opening of the car door/adjacent landing door combination 11/31 has advanced to the predefined point.
According to an embodiment the door sensor comprises a contact changing its state, when opening of the car door/adjacent landing door combination has advanced to the predefined point.
According to an embodiment the door sensor 14 is located in the elevator car 10.
According to an embodiment in the advance door opening ADO function 40 the door operator 13 starts early opening the car door/landing door combination 11/31 , when the car 10 has arrived at the ADO starting point.
According to an embodiment the ADO starting point is located at the proximity of the adjacent landing floor 31 to the car floor 12.
According to an embodiment at the moment of arrival of the car 10 at the ADO starting point the door operator 13 starts to drive the car door leaves such that the car door/landing door combination 11/31 starts to open.
The use of the invention is not limited to the embodiments disclosed in the figures. It will be obvious to a person skilled in the art that, as the technology advances, the inventive concept can be implemented in various ways. The invention and its embodiments are not limited to the examples described above but may vary within the scope of the claims.

Claims

1 . An elevator system comprising an elevator shaft (1 ); one or more landings (30) provided with landing floors (32); an elevator car (10) comprising a car door (11 ) and a car floor (12) and adapted to transfer passengers and/or cargo in the shaft; a hoisting machine (5) operable to drive the car; a positioning system (20) configured to provide an indication of a car position in the shaft; a door operator (13) configured to open or close the car door (11 ) in combination with an adjacent landing door (31 ); at least one door sensor (14) indicating that an opening of the car door/adjacent landing door combination (11/31 ) has advanced to a predefined point; a controller (50) configured to:
- obtain information from the positioning system (20);
- obtain information from the door sensor (14);
- generate a door opening request for the door operator (13), when the car (10) approaching a destination landing (30) has arrived at an ADO starting point; and
- adjust the ADO starting point for the particular landing (30), if the car (10) position deviates from a predetermined value range at the time when the opening of the car door/adjacent landing door combination (11/31 ) has advanced to the predefined point.
2. The elevator system according to claim 1 , wherein the positioning system (20) comprises door zone sensors (21), providing absolute position of the elevator car (10) within a door zone of each landing floor (32).
3. The elevator system according to claim 2, wherein the door zone sensor (21 ) is configured to indicate the elevator car (10) position in a situation when the car floor (12) is exactly at the same level with the landing floor (32).
4. The elevator system according any of preceding claims, wherein the positioning system comprises an encoder, such as a hoisting machine encoder or a car encoder, that measures position of the car (10) in the shaft (1 ) between the landings (30).
5. The elevator system according to any of preceding claims, wherein the positioning system (20) comprises an optically or magnetically readable tape extending in the shaft (1 ) along the trajectory of the elevator car (10).
6. The elevator system according to any of preceding claims, wherein the door operator (13) is located in the elevator car.
7. The elevator system according to any of preceding claims, wherein door operators (13) are located in the landings (30), such that each landing door (31 ) has a door operator of its own.
8. The elevator system according to any of preceding claims, wherein the door operator (13) comprises a belt drive that drives a belt operably coupled to the door leaves.
9. The elevator system according to any of preceding claims, wherein the door sensor (14) comprises a limit switch or a contact changing its state, when opening of the car door/adjacent landing door combination (11/31 ) has advanced to the predefined point.
10. The elevator system according to any of preceding claims, wherein the door sensor comprises a contact changing its state, when opening of the car door/adjacent landing door combination has advanced to the predefined point.
11. The elevator system according to any of preceding claims, wherein the door sensor (14) is located in the elevator car (10).
12. The elevator system according to any of preceding claims, wherein in the advance door opening ADO function (40) the door operator (13) starts early opening the car door/landing door combination (11/31 ), when the car (10) has arrived at the ADO starting point.
13. The elevator system according to any of preceding claims, wherein the ADO starting point is located at the proximity of the adjacent landing floor (31 ) to the car floor (12).
14. The elevator system according to any of preceding claims, wherein at the moment of arrival of the car (10) at the ADO starting point the door operator (13) starts to drive the car door leaves such that the car door/landing door combination (11/31 ) starts to open.
15. A method for optimizing elevator advanced door opening in an elevator system according to any of claims 1 to 14, the method comprising: obtaining information from the positioning system (20) and from the door sensor (14) by the controller (50); generating a door opening request for the door operator (13) by the controller (50), when the car (10) has arrived at an ADO starting point; and adjusting the ADO starting point for the particular landing (30), if the car position deviates from a predetermined value range at the time when the opening of the car door/adjacent landing door combination (11/31 ) has advanced to the predefined point.
PCT/EP2023/053492 2023-02-13 2023-02-13 Elevator system and method for optimizing advanced door opening WO2024170053A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308936A (en) * 1980-02-19 1982-01-05 Westinghouse Electric Corp. Elevator system
WO1984002697A1 (en) * 1983-01-11 1984-07-19 Maschf Augsburg Nuernberg Ag Control system for elevator devices
CN112357713A (en) * 2020-11-27 2021-02-12 杭州电子科技大学 Multifunctional elevator safety protection system and method
US20220112051A1 (en) * 2020-10-14 2022-04-14 Otis Elevator Company Monitoring system for conveyance system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308936A (en) * 1980-02-19 1982-01-05 Westinghouse Electric Corp. Elevator system
WO1984002697A1 (en) * 1983-01-11 1984-07-19 Maschf Augsburg Nuernberg Ag Control system for elevator devices
US20220112051A1 (en) * 2020-10-14 2022-04-14 Otis Elevator Company Monitoring system for conveyance system
CN112357713A (en) * 2020-11-27 2021-02-12 杭州电子科技大学 Multifunctional elevator safety protection system and method

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