EP4474330B1 - Aufzug und verfahren zur demonstration des betriebs eines aufzugssicherheitssystems - Google Patents

Aufzug und verfahren zur demonstration des betriebs eines aufzugssicherheitssystems

Info

Publication number
EP4474330B1
EP4474330B1 EP23177166.8A EP23177166A EP4474330B1 EP 4474330 B1 EP4474330 B1 EP 4474330B1 EP 23177166 A EP23177166 A EP 23177166A EP 4474330 B1 EP4474330 B1 EP 4474330B1
Authority
EP
European Patent Office
Prior art keywords
elevator
safety
stop
car
controller
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP23177166.8A
Other languages
English (en)
French (fr)
Other versions
EP4474330A1 (de
Inventor
Teppo VUORIO
Juha-Matti Aitamurto
Juhamatti Nikander
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kone Corp
Original Assignee
Kone Corp
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 Corp filed Critical Kone Corp
Priority to EP23177166.8A priority Critical patent/EP4474330B1/de
Priority to CN202410710307.4A priority patent/CN119079728A/zh
Publication of EP4474330A1 publication Critical patent/EP4474330A1/de
Application granted granted Critical
Publication of EP4474330B1 publication Critical patent/EP4474330B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0006—Monitoring devices or performance analysers
    • B66B5/0018—Devices monitoring the operating condition of the elevator system
    • B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/02—Control systems without regulation, i.e. without retroactive action
    • B66B1/06—Control systems without regulation, i.e. without retroactive action electric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/04—Driving gear ; Details thereof, e.g. seals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0087—Devices facilitating maintenance, repair or inspection tasks
    • B66B5/0093—Testing of safety devices

Definitions

  • the invention relates to an elevator and a method for demonstrating operation of an elevator safety system.
  • An elevator may have an elevator controller controlling elevator operation in a normal operation mode, to transfer passengers and/or cargo between landing floors.
  • the elevator may also have a safety system, which may comprise an electronic safety controller.
  • the safety controller may comprise a processing unit and an I/O circuitry in connection with safety contacts and/or other sensors, such as limit switches, position/speed sensors and/or cameras, to monitor elevator operation.
  • the safety controller may execute a safety stop of the elevator. In doing so the safety controller may override the operation of the elevator controller to bring the elevator to a safe state. For example, the safety controller may activate mechanical hoisting machinery brakes and/or interrupt power supply to a hoisting motor to stop movement of the elevator car, irrespective of the operation of the elevator controller.
  • the objective of the invention is to bring forward a solution for demonstrating working condition of an elevator safety system.
  • the elevator comprises an elevator car adapted to transfer passengers and/or cargo between landing floors in an elevator shaft, an elevator hoisting machinery adapted to move the elevator car, and an elevator controller configured to control elevator operation in normal operation mode.
  • the normal operation mode refers herein to an elevator service mode wherein elevator passengers and/or goods are transferred between landing floors according to service requests received from elevator passengers by the elevator controller.
  • the elevator controller controls the elevator car movement such that it follows a predefined motion profile. In this process the elevator car starts accelerating smoothly from a departure floor and later on decelerates and stops smoothly at a destination floor, such that passengers can safely enter and exit the car.
  • the motion control takes place by an elevator drive unit, which supplies power signals to an elevator hoisting motor of the elevator hoisting machinery.
  • the elevator comprises a safety system configured to receive safety information from a plurality of safety sensors, such as limit switches, position/speed sensors and/or cameras.
  • a safety system configured to receive safety information from a plurality of safety sensors, such as limit switches, position/speed sensors and/or cameras.
  • the safety system comprises a safety processing unit and an I/O circuitry connected to the processing unit and to the safety sensors.
  • the safety system comprises an electronic safety controller comprising the safety processing unit.
  • the elevator controller executes a normal stop.
  • the safety system In case the safety system detects a safety-related problem based on safety information received from the safety sensors, the safety system executes a safety stop, which overrides operation of the elevator controller to bring the elevator to a safe state.
  • the elevator controller In the normal stop the elevator controller generates one or more control signals activating hoisting machinery brakes and interrupting power supply of the elevator hoisting motor.
  • the safety controller In the safety stop the safety controller generates at least one safety stop signal.
  • a safe brake control SBC In response to said at least one safety stop signal a safe brake control SBC, and a safe torque off STO, electronic safety functions will be activated.
  • active state the SBC will cause activation of the hoisting machinery brakes and the STO will cause interrupting the power supply of the elevator hoisting motor.
  • the SBC and the STO are designed such that in active state they will override any control signals of the elevator controller.
  • the SBC function is configured to cause activation of the hoisting machinery brakes such as to interrupt a power supply that supplies current to electromagnets of the hoisting machinery brakes.
  • the STO function is configured to cause interrupting power supply of the elevator hoisting motor. According to an embodiment, the STO function is configured to disable control of (at least a subset of) power transistors of the drive unit.
  • the elevator controller receives a request for a safety stop demonstration test, it can deactivate the normal stop, such that it will not cause stopping of elevator car during the demonstration test. Operation of the safety stop can then be demonstrated by causing on purpose a safety-related problem (such as pressing a stop button during an elevator run) that triggers a safety stop by the safety system. Consequently, possible operational anomalies of the safety stop function may be detected in a reliable way.
  • a safety-related problem such as pressing a stop button during an elevator run
  • said request for the safety stop demonstration test is generated on-site via a manual operating interface or a mobile device.
  • said request may be received from a remote location, such as from an elevator service centre or from a remote server.
  • Said request may also be based e.g. on a predetermined schedule allocated for the safety stop demonstration test.
  • elevator safety may be improved, as the safety stop demonstration test provides reliable information of actual working condition of the safety stop function in the elevator safety system.
  • Figure 1 schematically illustrates some aspects of an exemplary elevator 100 comprising an elevator car 10 and a hoisting machinery 5 operable to drive the car 10 in an elevator shaft 1, to transfer passengers and/or cargo between landing floors 30.
  • the elevator 100 in Figure 1 comprises an elevator controller 110 configured to control elevator operation in normal operation mode.
  • the elevator controller 110 may comprise an elevator control unit and a drive unit, such as a frequency converter.
  • the elevator controller 110 controls the car 10 movement such that it follows a predefined, such as calculated motion profile. In this process the car starts accelerating smoothly from a departure floor and later on decelerates and stops smoothly at a destination floor, such that passengers can safely enter and exit the car.
  • the motion control takes place by the elevator drive unit, which supplies power signals to an elevator hoisting motor 51 of the elevator hoisting machinery 5.
  • the elevator controller 110 generates control commands 5.1; 5.2 needed to drive the hoisting machinery 5 and manages the movement of the car 10.
  • the hoisting machinery 5 comprises the electrical elevator hoisting motor 51 for driving the car 10, as well as hoisting machinery brakes 52 configured to apply to a traction sheave 53 or a rotating axis of the hoisting machinery, to stop movement of the car or hold the car standstill at a landing 30 in the shaft 1.
  • the elevator comprises at least one mechanical brake 52 to stop movement of the car or hold the car standstill in the shaft 1.
  • the elevator in Figure 1 has hoisting ropes 6 supporting the car 10, running via the traction sheave 53, and connected to a counterweight 7.
  • 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 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 30 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 in Figure 1 comprises safety sensors 20 configured to provide safety information associated with the elevator 100.
  • the safety sensors 20 may comprise e.g. one or more of: a limit switch, a position sensor, a speed sensor, a camera, a motor encoder; a car pulley encoder; a door zone sensor e.g. providing position information of the elevator car 10 in the vicinity of each landing; a measurement strip extending in the shaft next to elevator car trajectory such as an optically or magnetically readable tape extending in the shaft, a car door contact, a safety contact of an elevator safety gear.
  • Figure 2 shows an exemplary block diagram of some elements of the elevator 100.
  • the elevator 100 comprises a safety system 120 configured to receive safety information from a plurality of safety sensors 20.
  • the safety system in Figure 2 comprises a programmable electronic safety controller 60 with a safety processing unit 50, an I/O circuitry 70 associated with the safety processing unit, and one or more sensors 20 associated with the I/O circuitry and adapted to monitor elevator operation.
  • the safety processing unit 50 In the safety stop the safety processing unit 50 generates a safety stop signal.
  • the safety system 120 receives safety information from a plurality of safety sensors 20, and can detect a safety-related problem based on safety information received from at least one of the safety sensors.
  • the elevator controller 110 is configured to execute a normal stop to make elevator car 10 to stop or to hold the car standstill in the elevator shaft 1.
  • the normal stop control signals can be software signals or hardware signals.
  • the safety system 120 executes a safety stop to bring the elevator to a safety state, which safety stop overrides operation of the elevator controller 110.
  • the safety stop happens when the safety system 120 demands stopping, for example, when elevator landing doors 31 are opened while the car 10 is not parked at that floor 30, or when elevator speed exceeds a rated speed.
  • the safety stop may be activated by removing power from the motor 51 and brakes 52.
  • the safety stop is a separate means from normal stop. This means that it is difficult to know if stopping happened by normal stop or safety stop. It could be even so that one of the stopping means does not work at all because it has been bypassed for testing purposes or by incorrect system installation.
  • safety contactors could be powered continuously from mains instead of being supplied by elevator safety chain, or normal stop could be corrupted, malfunctioned or tampered so that stopping happens always by safety stop.
  • the elevator is provided with a safety stop demonstration test that can be performed to improve elevator safety.
  • the elevator controller 110 is configured to determine that one or more predetermined operational conditions for a safety stop demonstration test are fulfilled, and in response to the determination, deactivate said normal stop, to demonstrate operation of the safety stop.
  • the elevator controller 110 determines that one or more predetermined operational conditions for the safety stop demonstration test are fulfilled, and in response to the determination, deactivates the normal stop, to demonstrate operation of the safety stop.
  • the elevator controller 110 When the elevator controller 110 receives a request for the safety stop demonstration test, it deactivates the normal stop such that it will not cause stopping of elevator car during the safety stop demonstration test.
  • Said request for the safety stop demonstration test may be generated on-site via a manual operating interface or a mobile device.
  • Said request for the safety stop demonstration test may be received from a remote location, such as from an elevator service centre or from a remote server.
  • the elevator controller 110 In the normal stop the elevator controller 110 generates one or more control signals 5.1; 5.2 activating hoisting machinery brakes 52 and interrupting power supply of the elevator hoisting motor 51.
  • a safe brake control SBC and a safe torque off STO
  • electronic safety functions comprised by the safety system 120 will be activated.
  • the SBC will cause activation of the hoisting machinery brakes 52 and the STO will cause interrupting the power supply of the elevator hoisting motor 51.
  • the SBC and the STO are designed such that in active state they will override any control signals of the elevator controller 110.
  • the elevator controller 110 executes the normal stop in case a predefined stopping criteria of the elevator car 10 is not fulfilled during the safety stop demonstration test.
  • the elevator is switched to RDF/service mode after which the new drive commissioning test, for example called "Safety means stopping demonstration test", can be selected from a test menu of the elevator.
  • the elevator can be stopped using safety means by pressing STOP button, activating RDF mode, or activating other equivalent method to cause brake 52 stop request.
  • the drive software may monitor the elevator speed and stop the test if speed is not going to zero within a second in order to avoid hazardous situation.
  • a "Test failed" message is displayed in this case. If everything works correctly, the elevator stops immediately by the safety means and give a "Passed safety stop demonstration test" result for the operator.
  • the safety stop demonstration test is performed during elevator safety inspection. According to an embodiment, the safety stop demonstration test is mandatory when elevator safety inspection is performed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)

Claims (15)

  1. Aufzug (100), umfassend,
    eine Aufzugskabine (10), die dazu gestaltet ist, Fahrgäste und/oder Ladung zwischen Etagenabsätzen (30) in einem Aufzugsschacht (1) zu transportieren;
    ein Aufzugshubwerk (5), das dazu gestaltet ist, die Aufzugskabine zu bewegen;
    eine Aufzugssteuereinrichtung (110), die dazu ausgestaltet ist, den Aufzugsbetrieb in einem normalen Betriebsmodus zu steuern; und
    ein Sicherheitssystem (120), das ausgestaltet ist zum:
    Empfangen von Sicherheitsinformationen von einer Vielzahl von Sicherheitssensoren (20),
    Erkennen eines sicherheitsbezogenen Problems auf der Grundlage von Sicherheitsinformationen, die von mindestens einem der Sicherheitssensoren empfangen werden;
    wobei die Aufzugssteuereinrichtung (110) dazu ausgestaltet ist, einen normalen Halt auszuführen, um die Aufzugskabine (10) zum Halten zu bringen oder die Kabine im Aufzugsschacht (1) im Stillstand zu halten;
    und wobei das Sicherheitssystem (120) ausgestaltet ist zum:
    in einem Fall, in dem ein sicherheitsbezogenes Problem erkannt wurde, Ausführen eines Sicherheitshalts, um den Aufzug in einen Sicherheitszustand zu versetzen, wobei der Sicherheitshalt dazu ausgestaltet ist, den Betrieb der Aufzugssteuerung (110) außer Kraft zu setzen;
    dadurch gekennzeichnet, dass die Aufzugssteuerung (110) ausgestaltet ist zum:
    Bestimmen, dass eine oder mehrere vorbestimmte Betriebsbedingungen für einen Sicherheitshalt-Demonstrationstest erfüllt sind; und
    als Reaktion auf die Bestimmung, Deaktivieren des normalen Halts, um den Betrieb des Sicherheitshalts zu demonstrieren.
  2. Aufzug nach Anspruch 1, wobei das Sicherheitssystem (120) umfasst:
    eine Sicherheitsverarbeitungseinheit (50);
    E/A-Schaltungen (70), die der Sicherheitsverarbeitungseinheit zugehörig sind;
    einen oder mehrere Sensoren (20), die den E/A-Schaltungen zugehörig sind und dazu gestaltet sind, einen Aufzugsbetrieb zu überwachen.
  3. Aufzug nach Anspruch 2, wobei die Sicherheitsverarbeitungseinheit (50) dazu ausgestaltet ist, bei dem Sicherheitshalt mindestens ein Sicherheitshaltsignal zu erzeugen.
  4. Aufzug nach einem der vorhergehenden Ansprüche, wobei ein Sicherheitssensor (20) ausgewählt ist aus: einem Endschalter, einem Positionssensor, einem Geschwindigkeitssensor, einer Kamera, einem Motor-Codierer, einem Kabinenrollen-Codierer, einem Türzonensensor, einem Kabinentürkontakt, einem Sicherheitskontakt einer Aufzugsfangvorrichtung, einem optisch oder magnetisch lesbaren Band.
  5. Aufzug nach einem der vorhergehenden Ansprüche, wobei die Aufzugssteuereinrichtung (110) dazu ausgestaltet ist, beim normalen Halt zu erzeugen: ein Bremssteuersignal (5.2) zum Aktivieren einer mechanischen Bremse (52) eines Aufzughubmotors (51), der in dem Aufzugshubwerk (5) enthalten ist; und ein Motorsteuersignal (5.1) zum Unterbrechen der Leistungsversorgung des Aufzughubmotors.
  6. Aufzug nach einem der vorhergehenden Ansprüche, wobei das Sicherheitssystem (120) elektronische Sicherheitsfunktionen umfasst: eine Sicherheitsbremssteuerung SBC und ein sicher abgeschaltetes Drehmoment STO, die dazu ausgestaltet sind, als Reaktion auf ein Sicherheitshaltsignal aktiviert zu werden.
  7. Aufzug nach Anspruch 6, wobei die SBC im aktiven Zustand dazu ausgestaltet ist, Aktivierung von Hubwerkbremsen (52) zu veranlassen und das STO im aktiven Zustand dazu ausgestaltet ist, die Unterbrechung der Leistungsversorgung des Aufzughubmotors (51) zu veranlassen.
  8. Aufzug nach Anspruch 6 oder 7, wobei die SBC im aktiven Zustand dazu ausgestaltet ist, beliebige Steuersignale der Aufzugssteuereinrichtung (110) außer Kraft zu setzen, und das STO im aktiven Zustand dazu ausgestaltet ist, beliebige Steuersignale der Aufzugssteuereinrichtung (110) außer Kraft zu setzen.
  9. Aufzug nach einem der vorhergehenden Ansprüche, wobei die Aufzugssteuereinrichtung (110) dazu ausgestaltet ist, den normalen Halt in einem Fall auszuführen, in dem ein vordefiniertes Haltkriterium der Aufzugskabine (10) während des Sicherheitshalt-Demonstrationstests nicht erfüllt ist.
  10. Aufzug nach einem der vorhergehenden Ansprüche, wobei in einem Fall, in dem eine Anforderung eines Sicherheitshalt-Demonstrationstests durch die Aufzugssteuereinrichtung (110) empfangen wird, sie dazu ausgestaltet ist, den normalen Halt derart zu deaktivieren, dass er nicht das Halten der Aufzugskabine während des Sicherheitshalt-Demonstrationstests veranlasst.
  11. Aufzug nach Anspruch 10, wobei die Anforderung eines Sicherheitshalt-Demonstrationstests auf einem vorbestimmten Plan gründet, der dem Sicherheitshalt-Demonstrationstest zugewiesen ist.
  12. Verfahren zum Demonstrieren des Betriebs eines Aufzugssicherheitssystems (120) in einem Aufzug (100) nach einem der vorhergehenden Ansprüche, wobei das Verfahren umfasst:
    Bestimmen, durch eine Aufzugssteuereinrichtung (110), dass eine oder mehrere vorbestimmte Betriebsbedingungen für einen Sicherheitshalt-Demonstrationstest erfüllt sind, und
    als Reaktion auf die Bestimmung, Deaktivieren des normalen Halts durch die Aufzugssteuereinrichtung (110), um den Betrieb des Sicherheitshalts zu demonstrieren.
  13. Verfahren nach Anspruch 12, welches das Ausführen des normalen Halts durch die Aufzugssteuereinrichtung (110) in einem Fall umfasst, in dem ein vordefiniertes Haltkriterium der Aufzugskabine (10) während des Sicherheitshalt-Demonstrationstests nicht erfüllt wird.
  14. Verfahren nach Anspruch 12 oder 13, umfassend, in einem Fall, in dem eine Anforderung eines Sicherheitshalt-Demonstrationstests durch die Aufzugssteuereinrichtung (110) empfangen wird, Deaktivieren des normalen Halts durch die Aufzugssteuereinrichtung, derart dass sie während des Sicherheitshalt-Demonstrationstests nicht das Halten der Aufzugskabine veranlassen wird.
  15. Verfahren nach Anspruch 14, ferner umfassend das Erzeugen der Anforderung des Sicherheitshalt-Demonstrationstests vor Ort über eine manuelle Bedienungsoberfläche oder ein mobiles Gerät; und/oder Empfangen der Anforderung von einem entfernten Ort, wie von einem Aufzug-Service-Zentrum oder von einem entfernten Server.
EP23177166.8A 2023-06-05 2023-06-05 Aufzug und verfahren zur demonstration des betriebs eines aufzugssicherheitssystems Active EP4474330B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP23177166.8A EP4474330B1 (de) 2023-06-05 2023-06-05 Aufzug und verfahren zur demonstration des betriebs eines aufzugssicherheitssystems
CN202410710307.4A CN119079728A (zh) 2023-06-05 2024-06-03 升降机及用于演示升降机安全系统的操作的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23177166.8A EP4474330B1 (de) 2023-06-05 2023-06-05 Aufzug und verfahren zur demonstration des betriebs eines aufzugssicherheitssystems

Publications (2)

Publication Number Publication Date
EP4474330A1 EP4474330A1 (de) 2024-12-11
EP4474330B1 true EP4474330B1 (de) 2025-11-26

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Application Number Title Priority Date Filing Date
EP23177166.8A Active EP4474330B1 (de) 2023-06-05 2023-06-05 Aufzug und verfahren zur demonstration des betriebs eines aufzugssicherheitssystems

Country Status (2)

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EP (1) EP4474330B1 (de)
CN (1) CN119079728A (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4095079B1 (de) * 2021-05-28 2025-11-12 Otis Elevator Company Aufzugssystem und verfahren zur wiederherstellung des betriebs einer aufzugskabine
EP4177206B1 (de) * 2021-11-05 2025-06-11 Otis Elevator Company Einklemmungsvermeidung in einem aufzugssystem

Also Published As

Publication number Publication date
CN119079728A (zh) 2024-12-06
EP4474330A1 (de) 2024-12-11

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