EP2836453B1 - Monitoring device for a lift facility - Google Patents

Monitoring device for a lift facility Download PDF

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Publication number
EP2836453B1
EP2836453B1 EP13714925.8A EP13714925A EP2836453B1 EP 2836453 B1 EP2836453 B1 EP 2836453B1 EP 13714925 A EP13714925 A EP 13714925A EP 2836453 B1 EP2836453 B1 EP 2836453B1
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EP
European Patent Office
Prior art keywords
shaft
lift
shaft door
circuit
safety
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EP13714925.8A
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German (de)
French (fr)
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EP2836453A1 (en
Inventor
Philippe Henneau
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Inventio AG
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Inventio AG
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Publication of EP2836453A1 publication Critical patent/EP2836453A1/en
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    • 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
    • B66B5/0043—Devices enhancing safety during maintenance

Definitions

  • the invention relates to an elevator installation with a monitoring device which is suitable for monitoring shaft doors and for monitoring the elevator shaft.
  • Known elevator systems arranged in buildings comprise an elevator shaft in which an elevator cage is movably arranged. Individual floors of the building have openings to this elevator shaft, which are arranged along individual positions of the movable elevator car. These openings can be closed by shaft doors. In an arrangement of the elevator car at one of these shaft doors, the elevator car can be entered through this shaft door. With an opening of each other shaft door, the elevator shaft is freely accessible at this time. To protect persons from injuries in the elevator shaft, the shaft doors are integrated in a safety circuit. This safety circuit has the effect that, when the shaft door is unlocked or opened, the elevator car can not be moved in the elevator shaft. In subsequently locked or closed shaft doors, the elevator car can be moved in the elevator shaft according to the function of this safety circuit. Nevertheless, persons may be in the elevator shaft, in particular in its shaft pit.
  • US 7,954,606 shows an elevator safety system with a sensor for detecting a person present in the elevator shaft.
  • the sensor can be arranged on the elevator car or in the shaft pit.
  • the problem with such a solution is that for such a security system, an additional costly sensor must be placed in the elevator shaft.
  • EP 1 454 866 A2 discloses an elevator installation according to the preamble of claim 1 and a method according to the preamble of claim 10.
  • the object of the invention is therefore to equip an elevator installation with an improved monitoring device.
  • an elevator installation with a monitoring device for monitoring shaft doors
  • the elevator installation has an elevator car which can be moved in an elevator shaft, with a shaft door contact switch which is attached to one of the shaft doors is arranged, and a safety-relevant circuit, preferably a safety circuit which monitors a position of the shaft doors by means of the shaft door contact switch, characterized in that the elevator system additionally comprises a monitoring circuit independent of the safety-relevant circuit for monitoring the elevator shaft, wherein the elevator system by the Monitoring circuit is set into a safety mode when the shaft door contact switch is open and the elevator car is not located at the level of the shaft door.
  • the object is also achieved by a method for operating an elevator installation with a monitoring device, the elevator installation having an elevator car movable in a lift cage and shaft doors, wherein a shaft door contact switch, which is arranged on one of the shaft doors of the elevator system is opened, and a safety-related circuit is influenced based on the detected opening of the shaft door contact switch, and additionally influenced by the safety-relevant circuit monitoring circuit based on the detected opening of the shaft door contact switch, the elevator system is set by the monitoring circuit in a safety mode when the shaft door contact switch is open and the elevator car not is arranged at the level of the shaft door.
  • persons who are or have entered the elevator shaft are to be understood as persons who are outside the interior of the elevator cage in the elevator shaft.
  • a person can enter the elevator shaft exclusively through one of the open shaft doors.
  • this person may be a service technician or any other person who can open this landing door by means of a tool.
  • a safety-related circuit that the elevator car can not be moved. Unnoticed by the person located in the elevator shaft, however, it is possible that the shaft door closes again or locked, since such a shaft door is usually self-closing or -verriegelnd. This is the case in particular when the service technician works in the elevator shaft.
  • the safety-relevant circuit causes a continuation in this case a normal operation of the elevator car, which may pose a danger to the person located in the elevator shaft.
  • a shaft door contact switch is arranged on the monitored shaft door, by means of which the opening or unlocking of the shaft door is detected.
  • the invention is based on the finding that, in addition to being used in the safety-relevant circuit, this shaft door contact switch can be used in such a way that the person who has penetrated into the elevator shaft is protected.
  • an independent monitoring circuit is connected to the shaft door contact switch in addition to the safety-relevant circuit, by means of which the elevator system can be placed in a safety mode, if the interior of the elevator car is not arranged on the open monitored shaft door.
  • this safety mode remains beyond the time at which the shaft door contact switch is closed. In this way, despite reclosing or re-locking the shaft door, the person who has penetrated the elevator shaft is protected from injury.
  • a continuation of the normal operation is possible only by deactivating the safety mode after checking the elevator shaft.
  • a necessarily existing shaft door contact switch only need to be rewired and not be supplemented by a sensor on the shaft door, which can lead to problems such as space problems in a modernization of elevator systems, for example.
  • the safety mode can be designed in such a way that a travel path of the elevator car of the elevator installation which is in safety mode is limited relative to a travel path of the elevator cage of the elevator installation which is in normal operation.
  • the elevator car can no longer be moved in such a way that, when the safety mode is activated, it can be arranged on the uppermost and / or lowermost shaft door of the elevator installation. In this way, the person who has penetrated into the elevator shaft and who is located in the shaft pit or on the elevator car can not be endangered by the movement of the elevator cage and / or a counterweight.
  • the security mode be formed such that a traversing speed, which is used in the safety mode, compared to the normal operation of the elevator car is reduced.
  • the safety mode can be designed such that the safety mode causes a stop of the elevator car.
  • the shaft door contact switch is exclusively opened when the first shaft door is in the unlocked or open position. In this way it can be ensured that the elevator installation is not set to safety mode while the first landing door is still closed.
  • a development of the elevator system has a shaft door contact switch having control circuit, wherein the control circuit comprises a switchable by the shaft door contact switch element, preferably a contactor or relay, wherein a switching operation of the shaft door contact switch means of this switching element a switching operation in the safety-related circuit and a switching operation in the monitoring circuit causes.
  • the control circuit comprises a switchable by the shaft door contact switch element, preferably a contactor or relay, wherein a switching operation of the shaft door contact switch means of this switching element a switching operation in the safety-related circuit and a switching operation in the monitoring circuit causes.
  • a further development of the elevator installation comprises a signal transmitter arranged in the monitoring circuit and an emergency stop button arranged in the elevator shaft, the signal transmitter being arranged on the emergency stop button and the signal generator generating a signal in the safety mode triggered by the monitoring circuit, which signal is preferably audible or visual .
  • the emergency stop button, on which the signal generator is arranged can be arranged on a car roof or in the shaft pit. Thus, a person who is in the elevator shaft can be quickly made aware of the emergency stop button.
  • the shaft door is arranged on the shaft pit. In this way, the shaft pit of the elevator installation can be monitored, ie a person who is staying in the shaft pit of the elevator installation can be protected.
  • the monitoring circuit comprises a monitoring switch, wherein the monitoring switch is actuated during a switching operation of the shaft door contact switch and is bridged by means of a bridging contact in an arrangement of the elevator car at the level of the first shaft door.
  • the safety mode is triggered automatically. In this way, the person in the elevator shaft can be protected, without this must be active.
  • the shaft door contact switch of the shaft door arranged at a shaft door is monitored. In this way, a person can be protected who has entered the pit.
  • FIG. 1 shows an elevator system 22 with a safety-related circuit 8.
  • the elevator system 22 has an elevator shaft 24 with shaft doors 4a, 4b, 4c and an elevator car 24 movable in the elevator car 26.
  • the elevator car 26 has a car roof 31.
  • the elevator car 26 is arranged on a shaft door 4 c which is the uppermost in the elevator shaft 24.
  • the safety-relevant circuit 8 is preferably a safety circuit 8 'and may be part of a monitoring device.
  • the elevator shaft 24 comprises a shaft pit 28.
  • a shaft door contact switch 6a, 6b, 6c is arranged, which influence the safety-relevant circuit 8.
  • the safety-relevant circuit 8 is connected to a lift control 30 of the elevator installation 22.
  • An opening or unlocking one of Shaft doors 4a, 4b, 4c open the associated shaft door contact switch 6a, 6b, 6c and influence the elevator control 30 such that the elevator car 26 can not be moved during the opening of the shaft door contact switch 6a, 6b, 6c in a normal operation.
  • FIG. 2 and 4 show a simplified circuit diagram of a monitoring device 2 for an elevator system for monitoring shaft doors.
  • a shaft door contact switch 6a, 6b, 6c is arranged at each of the shaft doors.
  • the monitoring device 2 is exemplified in the elevator system 22 according to FIG. 1 arranged.
  • the circuit diagram is shown in a de-energized state.
  • the monitoring device 2 comprises a control circuit 12, a safety-relevant circuit 8 and a monitoring circuit 10.
  • the circuit diagram also shows an elevator control 30.
  • the safety-relevant circuit 8 is connected to the elevator control 30.
  • a first of the shaft door contact switch 6a is arranged on a first of the shaft doors 4a and forms part of the control circuit 12.
  • a switching element 14 is additionally arranged.
  • the switching element 14 is an example of a contactor or a relay. Each further shaft door contact switch 6b, 6c is arranged in the safety-relevant circuit 8.
  • the first shaft door contact switch 6a influences, in addition to the safety-relevant circuit 8, the monitoring circuit 10.
  • the safety-relevant circuit 8 comprises a safety switch 14.1.
  • the monitoring circuit 10 comprises a monitoring switch 14.2 and a bridging contact 44.
  • An opening of the first shaft door contact switch 6a in the control circuit 12 at an opening or unlocking the first shaft door leads according to the function of the switching element 14 to the fact that the monitoring switch 14.2 in the monitoring circuit 10 and the Safety switch 14.1 are connected in the safety-related circuit 8.
  • the circuit of the monitoring switch 14.2 causes at the opening of the first shaft door contact switch 6a that the elevator system 22 can be placed in a safety mode when the according FIG. 1 described elevator car is not arranged on the first shaft door.
  • An opening of the first shaft door contact switch 6a thus influences the safety-relevant circuit 8 by means of the switching element 14 such that a safety switch 14.1 arranged in the safety-relevant circuit 8 performs the switching operations of the first shaft door contact switch 6a as equally as if the first shaft door contact switch were 6a arranged within the safety-related circuit 8.
  • the monitoring switch 14.2 is bridged by means of the bridging contact 44.
  • a bridging element 45 is arranged on the elevator car, which closes the bridging contact 44 when the elevator car is arranged on the first shaft door 4a.
  • the bridging element 45 and / or the bridging contact 44 can be designed so that the monitoring switch 14.2 is also bridged when the shaft door contact switch 6a and thus the monitoring switch 14.2 is opened in the course of premature door opening of the shaft door 4a.
  • the elevator installation can be set to a safety mode.
  • FIG. 2 shows a first embodiment of the circuit diagram of the elevator installation with the monitoring device 2.
  • the monitoring device 2 includes an emergency stop circuit 60, which is connected to the elevator control 30.
  • an emergency stop button 18 is arranged in an elevator shaft of the elevator installation.
  • the monitoring circuit 10 of the monitoring device 2 includes a signal generator 16 and a switching element, for example a relay switch arrangement 50.1, 50.2.
  • the signal generator 16 may be arranged in the immediate vicinity of the emergency stop button 18 or on the emergency stop button 18 within the elevator shaft, wherein the emergency stop button 18 can be reached by a person entering the elevator shaft through the first landing door 4a.
  • the signal generator 16 When the monitoring switch 14.2 is opened and the monitoring switch 14.2 is not bridged, the signal generator 16 generates a signal, which is visual or audible by way of example.
  • the signal serves to make the person in the elevator shaft aware of the emergency stop button 18. In this way, made aware of the emergency stop button 18, the person is allowed to quickly press the emergency stop button 18 in an exemplary hazardous situation by the traveling cabin and thus to put the elevator system in the safety mode.
  • FIG. 4 shows a further embodiment of the circuit diagram of the elevator installation with the monitoring device 2.
  • the monitoring device 2 comprises an emergency stop circuit 60, which is connected to the elevator control 30.
  • the emergency stop circuit 60 has an emergency stop button 18 and an emergency stop switch 19.1.
  • the monitoring circuit 10 has a monitoring emergency switch 19.
  • the monitoring emergency switch 19 causes the emergency stop switch 19.1 to be actuated and the elevator installation to be set to safety mode. Accordingly, such actuation of the emergency stop switch 19.1 and actuation of the emergency stop button 18 by a person may affect the elevator control 30 in a similar manner. Accordingly, when the first shaft door 4a is opened or unlocked, the monitoring circuit 10 ensures that the elevator installation is automatically set to the safety mode if, at the same time, the elevator cage is not arranged on the shaft door of the elevator installation associated with the first shaft door contact switch 6a.
  • FIG. 3 shows the lower part of an elevator shaft 24 of the elevator installation, in particular a pit 28, with parts of a monitoring device 2.
  • a first shaft door 4a to be monitored which is arranged directly on the shaft pit 28, the shaft pit 28 through the shaft door arranged directly on it 4a can be entered.
  • a first shaft door contact switch 6a is arranged, which influences the safety-relevant circuit and the monitoring circuit of the monitoring device.
  • a bridging contact 44 of the monitoring device 2 is arranged so that a bridging element arranged on the elevator car (not shown) can bridge a monitoring switch, not shown, of the monitoring circuit.
  • a signal generator 16 is arranged at a arranged in the pit 28. Both the safety-related circuit and the emergency stop button 18 are connected to an elevator control. Remaining elements of the monitoring device 2 relating to the first landing door 4a can be arranged in a monitoring box 48.
  • a plurality of shaft doors of the elevator installation can also be integrated into a control circuit of a monitoring device according to the invention in order, for example, to protect a person located on the cabin roof of the elevator cage.
  • a monitoring circuit comprises a signal generator
  • an emergency stop button is to be arranged on the cabin roof or on the elevator car, so that it can be reached by the person to be protected.

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  • Elevator Door Apparatuses (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)

Description

Die Erfindung betrifft eine Aufzugsanlage mit einer Überwachungseinrichtung, welche zur Überwachung von Schachttüren und zur Überwachung des Aufzugsschachtes geeignet ist.The invention relates to an elevator installation with a monitoring device which is suitable for monitoring shaft doors and for monitoring the elevator shaft.

Bekannte in Gebäuden angeordnete Aufzugsanlagen umfassen einen Aufzugsschacht, in dem eine Aufzugskabine verfahrbar angeordnet ist. Einzelne Stockwerke des Gebäudes weisen Öffnungen zu diesem Aufzugsschacht auf, die entlang einzelner Positionen der verfahrbaren Aufzugskabine angeordnet sind. Diese Öffnungen können durch Schachttüren verschlossen werden. Bei einer Anordnung der Aufzugskabine an einer dieser Schachttüren kann die Aufzugskabine durch diese Schachttür betreten werden. Bei einer Öffnung jeder anderen Schachttür ist der Aufzugsschacht zu diesem Zeitpunkt frei zugänglich. Um Personen vor Verletzungen im Aufzugsschacht zu schützen, sind die Schachttüren in einen Sicherheitskreis eingebunden. Dieser Sicherheitskreis bewirkt, dass bei einer entriegelten bzw. geöffneten Schachttür die Aufzugskabine nicht im Aufzugsschacht verfahren werden kann. Bei anschliessend verriegelten bzw. geschlossenen Schachttüren ist gemäss der Funktion dieses Sicherheitskreises die Aufzugskabine im Aufzugsschacht verfahrbar. Dennoch können sich Personen im Aufzugsschacht, insbesondere in dessen Schachtgrube, befinden.Known elevator systems arranged in buildings comprise an elevator shaft in which an elevator cage is movably arranged. Individual floors of the building have openings to this elevator shaft, which are arranged along individual positions of the movable elevator car. These openings can be closed by shaft doors. In an arrangement of the elevator car at one of these shaft doors, the elevator car can be entered through this shaft door. With an opening of each other shaft door, the elevator shaft is freely accessible at this time. To protect persons from injuries in the elevator shaft, the shaft doors are integrated in a safety circuit. This safety circuit has the effect that, when the shaft door is unlocked or opened, the elevator car can not be moved in the elevator shaft. In subsequently locked or closed shaft doors, the elevator car can be moved in the elevator shaft according to the function of this safety circuit. Nevertheless, persons may be in the elevator shaft, in particular in its shaft pit.

US 7,954,606 zeigt ein Aufzugssicherheitssystem mit einem Sensor zum Detektieren einer im Aufzugsschacht anwesenden Person. Der Sensor kann auf der Aufzugskabine oder in der Schachtgrube angeordnet sein.
Problematisch bei einer solchen Lösung ist, dass für ein solches Sicherheitssystem ein zusätzlicher kostenintensiver Sensor im Aufzugsschacht angeordnet werden muss. US 7,954,606 shows an elevator safety system with a sensor for detecting a person present in the elevator shaft. The sensor can be arranged on the elevator car or in the shaft pit.
The problem with such a solution is that for such a security system, an additional costly sensor must be placed in the elevator shaft.

EP 1 454 866 A2 offenbart eine Aufzugsanlage gemäß dem Oberbegriff des Anspruchs 1 und ein Verfahren gemäß dem Oberbegriff des Anspruchs 10. EP 1 454 866 A2 discloses an elevator installation according to the preamble of claim 1 and a method according to the preamble of claim 10.

Aufgabe der Erfindung ist es daher, eine Aufzugsanlage mit einer verbesserten Überwachungseinrichtung auszustatten.The object of the invention is therefore to equip an elevator installation with an improved monitoring device.

Die Aufgabe wird gelöst durch eine Aufzugsanlage mit einer Überwachungseinrichtung zur Überwachung von Schachttüren, wobei die Aufzugsanlage eine in einem Aufzugsschacht verfahrbare Aufzugskabine aufweist, mit einem Schachttürkontaktschalter, der an einer der Schachttüren angeordnet ist, und einer sicherheitsrelevanten Schaltung, vorzugsweise einem Sicherheitskreis , die eine Stellung der Schachttüren mittels des Schachttürkontaktschalters überwacht, dadurch gekennzeichnet, dass die Aufzugsanlage zusätzlich eine von der sicherheitsrelevanten Schaltung unabhängige Überwachungsschaltung zur Überwachung des Aufzugsschachtes aufweist, wobei die Aufzugsanlage durch die Überwachungsschaltung in einen Sicherheitsmodus versetzbar ist, wenn der Schachttürkontaktschalter geöffnet ist und die Aufzugskabine nicht auf Höhe der Schachttür angeordnet ist.The object is achieved by an elevator installation with a monitoring device for monitoring shaft doors, wherein the elevator installation has an elevator car which can be moved in an elevator shaft, with a shaft door contact switch which is attached to one of the shaft doors is arranged, and a safety-relevant circuit, preferably a safety circuit which monitors a position of the shaft doors by means of the shaft door contact switch, characterized in that the elevator system additionally comprises a monitoring circuit independent of the safety-relevant circuit for monitoring the elevator shaft, wherein the elevator system by the Monitoring circuit is set into a safety mode when the shaft door contact switch is open and the elevator car is not located at the level of the shaft door.

Die Aufgabe wird ebenso gelöst durch ein Verfahren zum Betreiben einer Aufzugsanlage mit einer Überwachungseinrichtung, wobei die Aufzugsanlage eine in einem Aufzugsschacht verfahrbare Aufzugskabine und Schachttüren aufweist, wobei ein Schachttürkontaktschalter, welcher an einer der Schachttüren der Aufzugsanlage angeordnet ist, geöffnet wird, und eine sicherheitsrelevante Schaltung basierend auf der detektierten Öffnung des Schachttürkontaktschalters beeinflusst wird, und zusätzlich eine von der sicherheitsrelevanten Schaltung unabhängige Überwachungsschaltung basierend auf der detektierten Öffnung des Schachttürkontaktschalters beeinflusst wird, wobei die Aufzugsanlage durch die Überwachungsschaltung in einen Sicherheitsmodus versetzt wird, wenn der Schachttürkontaktschalter geöffnet ist und die Aufzugskabine nicht auf Höhe der Schachttür angeordnet ist.The object is also achieved by a method for operating an elevator installation with a monitoring device, the elevator installation having an elevator car movable in a lift cage and shaft doors, wherein a shaft door contact switch, which is arranged on one of the shaft doors of the elevator system is opened, and a safety-related circuit is influenced based on the detected opening of the shaft door contact switch, and additionally influenced by the safety-relevant circuit monitoring circuit based on the detected opening of the shaft door contact switch, the elevator system is set by the monitoring circuit in a safety mode when the shaft door contact switch is open and the elevator car not is arranged at the level of the shaft door.

Gemäss der vorliegenden Beschreibung sind Personen, die sich im Aufzugsschacht befinden oder diesen betreten haben, als Personen zu verstehen, die ausserhalb des Innenraumes der Aufzugskabine im Aufzugsschacht sind.According to the present description, persons who are or have entered the elevator shaft are to be understood as persons who are outside the interior of the elevator cage in the elevator shaft.

Eine Person kann den Aufzugsschacht ausschliesslich durch eine der geöffneten Schachttüren betreten. Beispielhaft kann diese Person ein Servicetechniker oder jede andere Person sein, die diese Schachttür mittels eines Werkzeuges öffnen kann. Während eines geöffneten oder entriegelten Zustandes der Schachttür bewirkt eine sicherheitsrelevante Schaltung, dass die Aufzugskabine nicht verfahren werden kann. Unbemerkt von der im Aufzugsschacht befindlichen Person ist es jedoch möglich, dass die Schachttür wieder verschliesst bzw. verriegelt, da eine solche Schachttür üblicherweise selbstschliessend bzw. -verriegelnd ist. Das ist insbesondere bei Arbeiten des Servicetechnikers im Aufzugsschacht der Fall. Die sicherheitsrelevante Schaltung bewirkt in diesem Fall eine Fort-setzung eines Normalbetriebes der Aufzugskabine, was eine Gefahr für die im Aufzugsschacht befindliche Person darstellen kann. Demnach muss zur Sicherheit bei Öffnung bzw. Entriegelung einer Schachttür, an der die Aufzugskabine zu diesem Zeitpunkt nicht angeordnet ist, davon ausgegangen werden, dass eine Person in den Aufzugsschacht eingestiegen sein kann. Für die Funktion der sicherheitsrelevanten Schaltung ist an der überwachten Schachttür ein Schachttürkontaktschalter angeordnet, mit dessen Hilfe die Öffnung bzw. Entriegelung der Schachttür detektiert wird.A person can enter the elevator shaft exclusively through one of the open shaft doors. By way of example, this person may be a service technician or any other person who can open this landing door by means of a tool. During an open or unlocked state of the landing door causes a safety-related circuit that the elevator car can not be moved. Unnoticed by the person located in the elevator shaft, however, it is possible that the shaft door closes again or locked, since such a shaft door is usually self-closing or -verriegelnd. This is the case in particular when the service technician works in the elevator shaft. The safety-relevant circuit causes a continuation in this case a normal operation of the elevator car, which may pose a danger to the person located in the elevator shaft. Accordingly, for safety when opening or unlocking a shaft door to which the elevator car is not arranged at this time, it must be assumed that a person may have entered the elevator shaft. For the function of the safety-relevant circuit, a shaft door contact switch is arranged on the monitored shaft door, by means of which the opening or unlocking of the shaft door is detected.

Der Erfindung liegt die Erkenntnis zugrunde, dass dieser Schachttürkontaktschalter zusätzlich zur Verwendung in der sicherheitsrelevanten Schaltung derart genutzt werden kann, dass die in den Aufzugsschacht eingedrungene Person geschützt wird. Zu diesem Zweck wird an den Schachttürkontaktschalter zusätzlich zur sicherheitsrelevanten Schaltung eine unabhängige Überwachungsschaltung angebunden, mittels dessen die Aufzugsanlage in einen Sicherheitsmodus versetzbar ist, wenn der Innenraum der Aufzugskabine nicht an der geöffneten überwachten Schachttür angeordnet ist. Dieser Sicherheitsmodus bleibt erfindungsgemäß über den Zeitpunkt hinaus, zu welchem der Schachttürkontaktschalter geschlossen wird, bestehen. Derart wird trotz einer Wiederverschliessung bzw. Wiederverriegelung der Schachttür die in den Aufzügsschacht eingedrungene Person vor Verletzungen geschützt. Eine Fortsetzung des Normalbetriebes ist nur mittels Deaktivierung des Sicherheitsmodus nach Überprüfung des Aufzugsschachtes möglich. So muss ein notwendig vorhandener Schachttürkontaktschalter lediglich neu verdrahtet werden und nicht um eine Sensorik an der Schachttür ergänzt werden, was beispielsweise bei einer Modernisierung von Aufzugsanlagen zu Problemen, beispielsweise Platzproblemen führen kann.The invention is based on the finding that, in addition to being used in the safety-relevant circuit, this shaft door contact switch can be used in such a way that the person who has penetrated into the elevator shaft is protected. For this purpose, an independent monitoring circuit is connected to the shaft door contact switch in addition to the safety-relevant circuit, by means of which the elevator system can be placed in a safety mode, if the interior of the elevator car is not arranged on the open monitored shaft door. According to the invention, this safety mode remains beyond the time at which the shaft door contact switch is closed. In this way, despite reclosing or re-locking the shaft door, the person who has penetrated the elevator shaft is protected from injury. A continuation of the normal operation is possible only by deactivating the safety mode after checking the elevator shaft. Thus, a necessarily existing shaft door contact switch only need to be rewired and not be supplemented by a sensor on the shaft door, which can lead to problems such as space problems in a modernization of elevator systems, for example.

Beispielhaft kann der Sicherheitsmodus derart ausgebildet sein, dass ein Verfahrweg der Aufzugskabine der sich im Sicherheitsmodus befindlichen Aufzugsanlage gegenüber einem Verfahrweg der Aufzugskabine der sich im Normalbetrieb befindlichen Aufzugsanlage eingeschränkt ist. Das heisst, dass die Aufzugskabine nicht mehr derart verfahren werden kann, dass sie bei aktiviertem Sicherheitsmodus an der obersten und/oder untersten Schachttür der Aufzugsanlage angeordnet werden kann. Derart kann die in den Aufzugsschacht eingedrungene Person, welche sich in der Schachtgrube oder auf der Aufzugskabine befindet, nicht durch die Bewegung der Aufzugskabine und/oder eines Gegengewichtes gefährdet werden. Darüber hinaus oder alternativ dazu kann der Sicherheitsmodus derart ausgebildet sein, dass eine Verfahrgeschwindigkeit, welche im Sicherheitsmodus angewendet wird, gegenüber dem Normalbetrieb der Aufzugskabine reduziert ist.By way of example, the safety mode can be designed in such a way that a travel path of the elevator car of the elevator installation which is in safety mode is limited relative to a travel path of the elevator cage of the elevator installation which is in normal operation. This means that the elevator car can no longer be moved in such a way that, when the safety mode is activated, it can be arranged on the uppermost and / or lowermost shaft door of the elevator installation. In this way, the person who has penetrated into the elevator shaft and who is located in the shaft pit or on the elevator car can not be endangered by the movement of the elevator cage and / or a counterweight. In addition, or alternatively, the security mode be formed such that a traversing speed, which is used in the safety mode, compared to the normal operation of the elevator car is reduced.

Alternativ zur Beeinflussung der Verfahrgeschwindigkeit bzw. des Verfahrweges kann der Sicherheitsmodus derart ausgestaltet sein, dass der Sicherheitsmodus einen Stopp der Aufzugskabine bewirkt.As an alternative to influencing the travel speed or the travel path, the safety mode can be designed such that the safety mode causes a stop of the elevator car.

Bei einer Weiterbildung der Aufzugsanlage ist der Schachttürkontaktschalter ausschliesslich geöffnet, wenn die erste Schachttür in entriegelter oder geöffneter Stellung ist. So kann sichergestellt werden, dass die Aufzugsanlage nicht fehlerhaft bei dennoch geschlossener erster Schachttür in den Sicherheitsmodus versetzt wird.In a further development of the elevator installation, the shaft door contact switch is exclusively opened when the first shaft door is in the unlocked or open position. In this way it can be ensured that the elevator installation is not set to safety mode while the first landing door is still closed.

Eine Weiterbildung der Aufzugsanlage weist eine den Schachttürkontaktschalter aufweisende Steuerschaltung auf, wobei die Steuerschaltung ein durch den Schachttürkontaktschalter schaltbares Schaltelement, vorzugsweise ein Schütz oder Relais, aufweist, wobei ein Schaltvorgang des Schachttürkontaktschalters mittels dieses Schaltelements einen Schaltvorgang in der sicherheitsrelevanten Schaltung und einen Schaltvorgang in der Überwachungsschaltung bewirkt. Derart kann sichergestellt werden, dass die Überwachungsschaltung nicht an die sicherheitsrelevante Schaltung angeschlossen wird, diese sicherheitsrelevante Schaltung also unabhängig von der Überwachungsschaltung ist.A development of the elevator system has a shaft door contact switch having control circuit, wherein the control circuit comprises a switchable by the shaft door contact switch element, preferably a contactor or relay, wherein a switching operation of the shaft door contact switch means of this switching element a switching operation in the safety-related circuit and a switching operation in the monitoring circuit causes. In this way it can be ensured that the monitoring circuit is not connected to the safety-relevant circuit, that safety-relevant circuit is therefore independent of the monitoring circuit.

Eine Weiterbildung der Aufzugsanlage umfasst einen in der Überwachungsschaltung angeordneten Signalgeber und eine im Aufzugsschacht angeordnete Notstopp-Taste, wobei der Signalgeber an der Notstopp-Taste angeordnet ist und der Signalgeber in dem durch die Überwachungsschaltung ausgelösten Sicherheitsmodus ein Signal generiert, welches vorzugsweise akustisch oder visuell ist. Die Notstopp-Taste, an der der Signalgeber angeordnet ist, kann an einem Kabinendach oder in der Schachtgrube angeordnet sein. So kann eine Person, die sich im Aufzugsschacht aufhält, schnell auf die Notstopp-Taste aufmerksam gemacht werden.A further development of the elevator installation comprises a signal transmitter arranged in the monitoring circuit and an emergency stop button arranged in the elevator shaft, the signal transmitter being arranged on the emergency stop button and the signal generator generating a signal in the safety mode triggered by the monitoring circuit, which signal is preferably audible or visual , The emergency stop button, on which the signal generator is arranged, can be arranged on a car roof or in the shaft pit. Thus, a person who is in the elevator shaft can be quickly made aware of the emergency stop button.

Bei einer Weiterbildung der Aufzugsanlage ist die Schachttür an der Schachtgrube angeordnet. Derart kann die Schachtgrube der Aufzugsanlage überwacht werden, also eine Person geschützt werden, die sich in der Schachtgrube der Aufzugsanlage aufhält.In a further development of the elevator installation, the shaft door is arranged on the shaft pit. In this way, the shaft pit of the elevator installation can be monitored, ie a person who is staying in the shaft pit of the elevator installation can be protected.

Bei einer Weiterbildung der Aufzugsanlage umfasst die Überwachungsschaltung einen Überwachungsschalter, wobei der Überwachungsschalter bei einem Schaltvorgang des Schachttürkontaktschalters betätigt wird und mittels eines Überbrückungskontaktes bei einer Anordnung der Aufzugskabine auf Höhe der ersten Schachttür überbrückt wird. Derart wird sichergestellt, dass die Aufzugsanlage nicht aufgrund einer geöffneten bzw. entriegelten Schachttür in den Sicherheitsmodus versetzt werden kann, wenn die Aufzugskabine so angeordnet ist, dass sie durch diese Schachttür betreten werden kann.In a development of the elevator installation, the monitoring circuit comprises a monitoring switch, wherein the monitoring switch is actuated during a switching operation of the shaft door contact switch and is bridged by means of a bridging contact in an arrangement of the elevator car at the level of the first shaft door. This ensures that the elevator installation can not be put into safety mode due to an open or unlocked shaft door if the elevator car is arranged so that it can be entered through this shaft door.

Bei einer Weiterbildung des Verfahrens wird der Sicherheitsmodus automatisch ausgelöst. Derart kann die Person im Aufzugsschacht geschützt werden, ohne dass diese aktiv werden muss.In a further development of the method, the safety mode is triggered automatically. In this way, the person in the elevator shaft can be protected, without this must be active.

Bei einer Weiterbildung des Verfahrens wird der Schachttürkontaktschalter der an einer Schachtgrube angeordneten Schachttür überwacht. Derart kann eine Person geschützt werden, die in die Schachtgrube eingestiegen ist.In a further development of the method, the shaft door contact switch of the shaft door arranged at a shaft door is monitored. In this way, a person can be protected who has entered the pit.

Im Folgenden wird die Erfindung anhand von Figuren näher erläutert. Es zeigen:

Figur 1:
eine Aufzugsanlage mit einer sicherheitsrelevanten Schaltung,
Figur 2:
ein Schaltschema einer Aufzugsanlage mit einer Überwachungseinrichtung,
Figur 3:
einen unteren Teil eines Aufzugsschachtes der Aufzugsanlage, und
Figur 4:
ein weiteres Schaltschema einer Aufzugsanlage mit einer Überwachungseinrichtung.
In the following the invention will be explained in more detail with reference to figures. Show it:
FIG. 1:
an elevator installation with a safety-relevant circuit,
FIG. 2:
a circuit diagram of an elevator installation with a monitoring device,
FIG. 3:
a lower part of an elevator shaft of the elevator installation, and
FIG. 4:
a further circuit diagram of an elevator system with a monitoring device.

Figur 1 zeigt eine Aufzugsanlage 22 mit einer sicherheitsrelevanten Schaltung 8. Die Aufzugsanlage 22 weist einen Aufzugsschacht 24 mit Schachttüren 4a, 4b, 4c und eine in dem Aufzugsschacht 24 verfahrbare Aufzugskabine 26 auf. Die Aufzugskabine 26 hat ein Kabinendach 31. Beispielhaft ist die Aufzugskabine 26 an einer im Aufzugsschacht 24 obersten Schachttür 4c angeordnet. Die sicherheitsrelevante Schaltung 8 ist vorzugsweise ein Sicherheitskreis 8' und kann Bestandteil einer Überwachungseinrichtung sein. Der Aufzugsschacht 24 umfasst eine Schachtgrube 28. An jeder der Schachttüren 4a, 4b, 4c ist ein Schachttürkontaktschalter 6a, 6b, 6c angeordnet, die die sicherheitsrelevanten Schaltung 8 beeinflussen. Die sicherheitsrelevante Schaltung 8 ist mit einer Aufzügssteuerung 30 der Aufzugsanlage 22 verbunden. Eine Öffnung oder Entriegelung einer der Schachttüren 4a, 4b, 4c öffnet den zugeordneten Schachttürkontaktschalter 6a, 6b, 6c und beeinflusst die Aufzugssteuerung 30 derart, dass die Aufzugskabine 26 während der Öffnung des Schachttürkontaktschalters 6a, 6b, 6c nicht in einem Normalbetrieb verfahren werden kann. FIG. 1 shows an elevator system 22 with a safety-related circuit 8. The elevator system 22 has an elevator shaft 24 with shaft doors 4a, 4b, 4c and an elevator car 24 movable in the elevator car 26. The elevator car 26 has a car roof 31. By way of example, the elevator car 26 is arranged on a shaft door 4 c which is the uppermost in the elevator shaft 24. The safety-relevant circuit 8 is preferably a safety circuit 8 'and may be part of a monitoring device. The elevator shaft 24 comprises a shaft pit 28. At each of the shaft doors 4a, 4b, 4c, a shaft door contact switch 6a, 6b, 6c is arranged, which influence the safety-relevant circuit 8. The safety-relevant circuit 8 is connected to a lift control 30 of the elevator installation 22. An opening or unlocking one of Shaft doors 4a, 4b, 4c open the associated shaft door contact switch 6a, 6b, 6c and influence the elevator control 30 such that the elevator car 26 can not be moved during the opening of the shaft door contact switch 6a, 6b, 6c in a normal operation.

Figur 2 und 4 zeigen ein vereinfachtes Schaltschema einer Überwachungseinrichtung 2 für eine Aufzugsanlage zur Überwachung von Schachttüren. An jeder der Schachttüren ist ein Schachttürkontaktschalter 6a, 6b, 6c angeordnet. Die Überwachungseinrichtung 2 wird beispielhaft in der Aufzugsanlage 22 gemäss Figur 1 angeordnet. Das Schaltschema ist in einem spannungslosen Zustand gezeigt. Die Überwachungseinrichtung 2 umfasst eine Steuerschaltung 12, eine sicherheitsrelevante Schaltung 8 und eine Überwachungsschaltung 10. Das Schaltschema zeigt ausserdem eine Aufzugssteuerung 30. Die sicherheitsrelevante Schaltung 8 ist mit der Aufzugssteuerung 30 verbunden. Ein erster der Schachttürkontaktschalter 6a ist an einer ersten der Schachttüren 4a angeordnet und Bestandteil der Steuerschaltung 12. In der Steuerschaltung 12 ist zusätzlich ein Schaltelement 14 angeordnet. Das Schaltelement 14 ist beispielhaft ein Schütz oder ein Relais. Jeder weitere Schachttürkontaktschalter 6b, 6c ist in der sicherheitsrelevanten Schaltung 8 angeordnet. Der erste Schachttürkontaktschalter 6a beeinflusst zusätzlich zur sicherheitsrelevanten Schaltung 8 auch die Überwachungsschaltung 10. Die sicherheitsrelevante Schaltung 8 umfasst einen Sicherheitsschalter 14.1. Die Überwachungsschaltung 10 umfasst einen Überwachungsschalter 14.2 und einen Überbrückungskontakt 44. Eine Öffnung des ersten Schachttürkontaktschalters 6a in der Steuerschaltung 12 bei einer Öffnung bzw. Entriegelung der ersten Schachttür führt gemäss der Funktion des Schaltelements 14 dazu, dass der Überwachungsschalter 14.2 in der Überwachungsschaltung 10 und der Sicherheitsschalter 14.1 in der sicherheitsrelevanten Schaltung 8 geschaltet werden. Die Schaltung des Überwachungsschalters 14.2 bewirkt bei der Öffnung des ersten Schachttürkontaktschalters 6a, dass die Aufzugsanlage 22 in einen Sicherheitsmodus versetzt werden kann, wenn die gemäss Figur 1 beschriebene Aufzugskabine nicht an der ersten Schachttür angeordnet ist. FIG. 2 and 4 show a simplified circuit diagram of a monitoring device 2 for an elevator system for monitoring shaft doors. At each of the shaft doors a shaft door contact switch 6a, 6b, 6c is arranged. The monitoring device 2 is exemplified in the elevator system 22 according to FIG. 1 arranged. The circuit diagram is shown in a de-energized state. The monitoring device 2 comprises a control circuit 12, a safety-relevant circuit 8 and a monitoring circuit 10. The circuit diagram also shows an elevator control 30. The safety-relevant circuit 8 is connected to the elevator control 30. A first of the shaft door contact switch 6a is arranged on a first of the shaft doors 4a and forms part of the control circuit 12. In the control circuit 12, a switching element 14 is additionally arranged. The switching element 14 is an example of a contactor or a relay. Each further shaft door contact switch 6b, 6c is arranged in the safety-relevant circuit 8. The first shaft door contact switch 6a influences, in addition to the safety-relevant circuit 8, the monitoring circuit 10. The safety-relevant circuit 8 comprises a safety switch 14.1. The monitoring circuit 10 comprises a monitoring switch 14.2 and a bridging contact 44. An opening of the first shaft door contact switch 6a in the control circuit 12 at an opening or unlocking the first shaft door leads according to the function of the switching element 14 to the fact that the monitoring switch 14.2 in the monitoring circuit 10 and the Safety switch 14.1 are connected in the safety-related circuit 8. The circuit of the monitoring switch 14.2 causes at the opening of the first shaft door contact switch 6a that the elevator system 22 can be placed in a safety mode when the according FIG. 1 described elevator car is not arranged on the first shaft door.

Eine Öffnung des ersten Schachttürkontaktschalters 6a beeinflusst damit die sicherheitsrelevante Schaltung 8 mittels des Schaltelementes 14 derart, dass ein in der sicherheitsrelevanten Schaltung 8 angeordneter Sicherheitsschalter 14.1 die Schaltvorgänge des ersten Schachttürkontaktschalters 6a derart gleichwertig ausführt, als wäre der erste Schachttürkontaktschalter 6a innerhalb der sicherheitsrelevanten Schaltung 8 angeordnet.An opening of the first shaft door contact switch 6a thus influences the safety-relevant circuit 8 by means of the switching element 14 such that a safety switch 14.1 arranged in the safety-relevant circuit 8 performs the switching operations of the first shaft door contact switch 6a as equally as if the first shaft door contact switch were 6a arranged within the safety-related circuit 8.

Bei einer Anordnung der Aufzugskabine an der ersten Schachttür, gleichbedeutend mit einer Anordnung der Aufzugskabine auf Höhe der ersten Schachttür, ist es nicht möglich, den Aufzugsschacht durch die geöffnete erste Schachttür zu betreten. Entsprechend wird bei der Anordnung der Aufzugskabine an der ersten Schachttür der Überwachungsschalter 14.2 mittels des Überbrückungskontaktes 44 überbrückt. Zu diesem Zweck ist ein Überbrückungselement 45 an der Aufzugskabine angeordnet, welches bei Anordnung der Aufzugskabine an der ersten Schachttür 4a den Überbrückungskontakt 44 schliesst. Das Überbrückungselement 45 und/oder der Überbrückungskontakt 44 können so ausgeführt sein, dass der Überwachungsschalter 14.2 auch überbrückt wird, wenn der Schachttürkontaktschalter 6a und somit der Überwachungsschalter 14.2 im Verlauf eines vorzeitigen Türöffnens der Schachttür 4a geöffnet wird. Bei einer Öffnung des Überwachungsschalters 14.2 ohne dessen Überbrückung ist die Aufzugsanlage in einen Sicherheitsmodus versetzbar.In an arrangement of the elevator car at the first shaft door, synonymous with an arrangement of the elevator car at the level of the first shaft door, it is not possible to enter the elevator shaft through the open first shaft door. Accordingly, in the arrangement of the elevator car at the first shaft door, the monitoring switch 14.2 is bridged by means of the bridging contact 44. For this purpose, a bridging element 45 is arranged on the elevator car, which closes the bridging contact 44 when the elevator car is arranged on the first shaft door 4a. The bridging element 45 and / or the bridging contact 44 can be designed so that the monitoring switch 14.2 is also bridged when the shaft door contact switch 6a and thus the monitoring switch 14.2 is opened in the course of premature door opening of the shaft door 4a. When the monitoring switch 14.2 is opened without bridging it, the elevator installation can be set to a safety mode.

Figur 2 zeigt eine erste Ausführungsvariante des Schaltschemas der Aufzugsanlage mit der Überwachungseinrichtung 2. Die Überwachungseinrichtung 2 umfasst einen Notstopp-Schaltung 60, die mit der Aufzugssteuerung 30 verbunden ist. In der Notstopp-Schaltung 60 ist eine Notstopp-Taste 18 angeordnet. Die Notstopp-Taste 18 ist in einem Aufzugsschacht der Aufzugsanlage angeordnet. Die Überwachungsschaltung 10 der Überwachungseinrichtung 2 beinhaltet einen Signalgeber 16 und ein Schaltelement, beispielhaft eine Relaisschalteranordnung 50.1, 50.2. Der Signalgeber 16 kann in unmittelbarer Umgebung der Notstopp-Taste 18 oder an der Notstopp-Taste 18 innerhalb des Aufzugsschachtes angeordnet sein, wobei die Notstopp-Taste 18 von einer durch die erste Schachttür 4a in den Aufzugsschacht eingestiegenen Person erreichbar ist. Bei der Öffnung des Überwachungsschalters 14.2 und nicht erfolgter Überbrückung des Überwachungsschalters 14.2 generiert der Signalgeber 16 ein Signal, welches beispielhaft visuell oder akustisch ist. Das Signal dient dazu, die im Aufzugsschacht befindliche Person auf die Notstopp-Taste 18 aufmerksam zu machen. Derartig auf die Notstopp-Taste 18 aufmerksam gemacht, wird es der Person ermöglicht, bei einer beispielhaften Gefahrensituation durch die verfahrende Kabine schnell die Notstopp-Taste 18 zu betätigen und somit die Aufzugsanlage in den Sicherheitsmodus zu versetzen. FIG. 2 shows a first embodiment of the circuit diagram of the elevator installation with the monitoring device 2. The monitoring device 2 includes an emergency stop circuit 60, which is connected to the elevator control 30. In the emergency stop circuit 60, an emergency stop button 18 is arranged. The emergency stop button 18 is arranged in an elevator shaft of the elevator installation. The monitoring circuit 10 of the monitoring device 2 includes a signal generator 16 and a switching element, for example a relay switch arrangement 50.1, 50.2. The signal generator 16 may be arranged in the immediate vicinity of the emergency stop button 18 or on the emergency stop button 18 within the elevator shaft, wherein the emergency stop button 18 can be reached by a person entering the elevator shaft through the first landing door 4a. When the monitoring switch 14.2 is opened and the monitoring switch 14.2 is not bridged, the signal generator 16 generates a signal, which is visual or audible by way of example. The signal serves to make the person in the elevator shaft aware of the emergency stop button 18. In this way, made aware of the emergency stop button 18, the person is allowed to quickly press the emergency stop button 18 in an exemplary hazardous situation by the traveling cabin and thus to put the elevator system in the safety mode.

Figur 4 zeigt eine weitere Ausführungsvariante des Schaltschemas der Aufzugsanlage mit der Überwachungseinrichtung 2. Die Überwachungseinrichtung 2 umfasst eine Notstopp-Schaltung 60, die mit der Aufzugssteuerung 30 verbunden ist. Die Notstopp-Schaltung 60 weist eine Notstopp-Taste 18 und einen Notstopp-Schalter 19.1 auf. Die Überwachungsschaltung 10 weist einen Überwachungsnotschalter 19 auf. FIG. 4 shows a further embodiment of the circuit diagram of the elevator installation with the monitoring device 2. The monitoring device 2 comprises an emergency stop circuit 60, which is connected to the elevator control 30. The emergency stop circuit 60 has an emergency stop button 18 and an emergency stop switch 19.1. The monitoring circuit 10 has a monitoring emergency switch 19.

Bei einer Öffnung des ersten Schachttürkontaktschalters 6a und gleichzeitiger Nichtüberbrückung des Überbrückungskontaktes 44 durch das Überbrückungselement 45 bewirkt der Überwachungsnotschalter 19, dass der Notstopp-Schalter 19.1 betätigt und die Aufzugsanlage in den Sicherheitsmodus versetzt wird. Entsprechend können eine derartige Betätigung des Notstopp-Schalters 19.1 und eine Betätigung der Notstopp-Taste 18 durch eine Person die Aufzugssteuerung 30 auf vergleichbare Art und Weise beeinflussen. Die Überwachungsschaltung 10 bewirkt demgemäss bei Öffnung bzw. Entriegelung der ersten Schachttür 4a, dass die Aufzugsanlage automatisch in den Sicherheitsmodus versetzt wird, wenn gleichzeitig die Aufzugskabine nicht an der dem ersten Schachttürkontaktschalter 6a zugeordneten Schachttür der Aufzugsanlage angeordnet ist.When the first shaft door contact switch 6a is opened and the bridging contact 44 is not bridged by the bridging element 45, the monitoring emergency switch 19 causes the emergency stop switch 19.1 to be actuated and the elevator installation to be set to safety mode. Accordingly, such actuation of the emergency stop switch 19.1 and actuation of the emergency stop button 18 by a person may affect the elevator control 30 in a similar manner. Accordingly, when the first shaft door 4a is opened or unlocked, the monitoring circuit 10 ensures that the elevator installation is automatically set to the safety mode if, at the same time, the elevator cage is not arranged on the shaft door of the elevator installation associated with the first shaft door contact switch 6a.

Figur 3 zeigt den unteren Teil eines Aufzugsschachtes 24 der Aufzugsanlage, insbesondere eine Schachtgrube 28, mit Teilen einer Überwachungseinrichtung 2. Dargestellt ist eine zu überwachende erste Schachttür 4a, die unmittelbar an der Schachtgrube 28 angeordnet ist, wobei die Schachtgrube 28 durch die unmittelbar an ihr angeordnete Schachttür 4a betreten werden kann. An der ersten Schachttür 4a ist ein erster Schachttürkontaktschalter 6a angeordnet, der die sicherheitsrelevante Schaltung und die Überwachungsschaltung der Überwachungseinrichtung beeinflusst. In der Umgebung der ersten Schachttür 4a ist ein Überbrückungskontakt 44 der Überwachungseinrichtung 2 angeordnet, so dass ein an der nicht dargestellten Aufzugskabine angeordnetes Überbrückungselement einen nicht dargestellten Überwachungsschalter der Überwachungsschaltung überbrücken kann. An einer in der Schachtgrube 28 angeordneten Notstopp-Taste 18 ist ein Signalgeber 16 angeordnet. Sowohl die sicherheitsrelevante Schaltung als auch die Notstopp-Taste 18 sind mit einer Aufzugssteuerung verbunden. Restliche die erste Schachttür 4a betreffende Elemente der Überwachungseinrichtung 2 können in einer Überwachungsbox 48 angeordnet sein. FIG. 3 shows the lower part of an elevator shaft 24 of the elevator installation, in particular a pit 28, with parts of a monitoring device 2. Shown is a first shaft door 4a to be monitored, which is arranged directly on the shaft pit 28, the shaft pit 28 through the shaft door arranged directly on it 4a can be entered. At the first shaft door 4a, a first shaft door contact switch 6a is arranged, which influences the safety-relevant circuit and the monitoring circuit of the monitoring device. In the vicinity of the first shaft door 4a, a bridging contact 44 of the monitoring device 2 is arranged so that a bridging element arranged on the elevator car (not shown) can bridge a monitoring switch, not shown, of the monitoring circuit. At a arranged in the pit 28 emergency stop button 18, a signal generator 16 is arranged. Both the safety-related circuit and the emergency stop button 18 are connected to an elevator control. Remaining elements of the monitoring device 2 relating to the first landing door 4a can be arranged in a monitoring box 48.

Alternativ zur Einbindung der unmittelbar an der Schachtgrube 28 angeordneten Schachttür 4a können auch mehrere Schachttüren der Aufzugsanlage in eine Steuerschaltung einer erfindungsgemässen Überwachungseinrichtung eingebunden werden, um beispielsweise eine auf dem Kabinendach der Aufzugskabine befindliche Person zu schützen. Derart können auch mehrere Schachttüren, die unmittelbar an der Schachtgrube 28 gangeordnet sind, überwacht werden. Bei der Ausführungsvariante, deren Überwachungsschaltung einen Signalgeber umfasst, ist eine Notstopp-Taste am Kabinendach bzw. an der Aufzugskabine anzuordnen, damit diese von der zu schützenden Person erreicht werden kann.Alternatively to the integration of the shaft door 28 arranged directly at the shaft pit 4a, a plurality of shaft doors of the elevator installation can also be integrated into a control circuit of a monitoring device according to the invention in order, for example, to protect a person located on the cabin roof of the elevator cage. In this way, several shaft doors, which are arranged directly at the shaft pit 28, can be monitored. In the embodiment variant whose monitoring circuit comprises a signal generator, an emergency stop button is to be arranged on the cabin roof or on the elevator car, so that it can be reached by the person to be protected.

Claims (13)

  1. Lift installation (22) with a monitoring device (2) for monitoring shaft doors (4a, 4b, 4c), wherein the lift installation (22) comprises a lift cage (26) movable in a lift shaft (24), with a shaft door contact switch (6a), which is arranged at one of the shaft doors (4a), and a safety-relevant circuit (8), preferably a safety circuit (8') which monitors a setting of the shaft doors (4a, 4b, 4c) by means of the shaft door contact switch (6a), characterised in that the lift installation (22) additionally comprises a monitoring circuit (10), which is independent of the safety-relevant circuit (8), for monitoring the lift shaft (24), wherein the lift installation (22) can be set by the monitoring circuit (10) into a safety mode when the shaft door contact switch (6a) is opened and the lift cage (26) is not arranged at the level of the shaft door (4a), characterised in that the safety mode is such that it is unchanging when the shaft door contact switch (6a) is closed.
  2. Lift installation according to claim 1, wherein the safety mode is such that a travel path of the lift cage (26) of the lift installation (22) in the safety mode is restricted by comparison with a travel path of the lift cage of the lift installation (26) in normal operation or the safety mode causes stopping of the lift cage (26).
  3. Lift installation (22) according to one of the preceding claims, wherein the shaft door contact switch (6a) is opened exclusively when the shaft door (4a) is an unlocked or open setting.
  4. Lift installation 922) according to any one of the preceding claims, with a control circuit (12) comprising the shaft door contact switch (6a) wherein the control circuit (12) comprises a switch element (14), preferably a circuitbreaker or relay, switchable by the shaft door contact circuit (6a), wherein a switching process of the shaft door contact switch (6a) causes by means of this switch element (14) a switching process in the safety-relevant circuit (8) and a switching process in the monitoring circuit (10).
  5. Lift installation (22) according to any one of the preceding claims, wherein the lift installation (22) comprises a signal transmitter (16), which is arranged in the monitoring circuit (10), and an emergency stop button (18), which is arranged in the lift shaft, wherein the signal transmitter (16) is arranged at the emergency stop button (18) and the signal transmitter (16) generates a signal, which is preferably acoustic or visual, in the safety mode triggered by the monitoring circuit (10).
  6. Lift installation (22) according to claim 5, wherein the emergency stop button (18) is arranged in a shaft pit (28).
  7. Lift installation (22) according to any one of the preceding claims, wherein the shaft door (4a) is arranged at a or the shaft pit (28).
  8. Lift installation (22) according to claim 5, wherein the emergency stop button (18) is arranged at a cage roof (31) of the lift cage (26).
  9. Lift installation (22) according to any one of the preceding claims, wherein the monitoring circuit (10) comprises a monitoring switch (14.2), wherein the monitoring switch (14.2) is actuated when a switching process of the shaft door contact switch (6a) takes place and is bridged over by means of a bridging-over contact (44) when the lift cage (26) is arranged at the level of the shaft door (4a).
  10. Method of operating a lift installation (22) with a monitoring device (2), wherein the lift installation (22) comprises a lift cage (26), which is movable in a lift shaft (24), and shaft doors (4a, 4b, 4c), wherein:
    a shaft door contact switch (6a), which is arranged at one of the shaft doors (4a) of the lift installation (22), is opened, and
    a safety-relevant circuit (8, 8') is influenced based on the detected opening of the shaft door contact switch (6a), and in addition
    a monitoring circuit (10) independent of the safety-relevant circuit (8) is influenced based on the detected opening of the shaft door contact switch (6a),
    wherein the lift installation (22) is set by the monitoring circuit (10) into a safety mode when the shaft door contact switch (6a) is opened and the lift cage (26) is not arranged at the level of the shaft door (4a),
    characterised in that the safety mode activated by means of the monitoring circuit (10) is maintained when the shaft door contact switch (6a) is closed.
  11. Method according to claim 10, wherein the safety mode is triggered automatically.
  12. Method according to claim 10, wherein a preferably acoustic or visual signal is generated by the monitoring circuit (10), wherein the signal is suitable for drawing the attention of a person to an emergency stop button (18) of the monitoring device (2).
  13. Method according to any one of claims 10 to 12, wherein the shaft door contact switch (6a) of the shaft door (4a) arranged at a shaft pit (28) is monitored.
EP13714925.8A 2012-04-12 2013-04-08 Monitoring device for a lift facility Active EP2836453B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13714925.8A EP2836453B1 (en) 2012-04-12 2013-04-08 Monitoring device for a lift facility

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12163960 2012-04-12
PCT/EP2013/057330 WO2013153044A1 (en) 2012-04-12 2013-04-08 Monitoring device of an elevator system
EP13714925.8A EP2836453B1 (en) 2012-04-12 2013-04-08 Monitoring device for a lift facility

Publications (2)

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EP2836453A1 EP2836453A1 (en) 2015-02-18
EP2836453B1 true EP2836453B1 (en) 2016-03-09

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DE10108772A1 (en) * 2001-02-23 2002-11-21 Otis Elevator Co Elevator safety device
DE10309655A1 (en) * 2003-03-06 2004-09-16 Aufzugswerke M. Schmitt & Sohn Gmbh & Co. elevator system
EP1618059B1 (en) * 2003-04-30 2007-01-03 ThyssenKrupp Elevator AG Elevator system and method for controlling said elevator system
US7353914B2 (en) * 2003-10-20 2008-04-08 Inventio Ag Safety system for an elevator
WO2007040538A1 (en) 2005-10-05 2007-04-12 Otis Elevator Company Elevator system control responsive to hoistway access detection

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