EP3080030B1 - Safety circuit for a lift system - Google Patents

Safety circuit for a lift system Download PDF

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Publication number
EP3080030B1
EP3080030B1 EP14800042.5A EP14800042A EP3080030B1 EP 3080030 B1 EP3080030 B1 EP 3080030B1 EP 14800042 A EP14800042 A EP 14800042A EP 3080030 B1 EP3080030 B1 EP 3080030B1
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EP
European Patent Office
Prior art keywords
circuit
switching
state
safety
voltage
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Not-in-force
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EP14800042.5A
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German (de)
French (fr)
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EP3080030A1 (en
Inventor
Ivo LUSTENBERGER
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Inventio AG
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Inventio AG
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Priority to PL14800042T priority Critical patent/PL3080030T3/en
Priority to EP14800042.5A priority patent/EP3080030B1/en
Publication of EP3080030A1 publication Critical patent/EP3080030A1/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
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • 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
    • B66B13/22—Operation of door or gate contacts
    • 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
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H2001/0005—Redundant contact pairs in one switch for safety reasons

Definitions

  • the invention relates to a safety circuit for the safe operation of an elevator system and an elevator system with such a safety circuit according to the independent claims.
  • Today's elevator systems are equipped with a safety circuit. This consists of several series-connected switching contacts of different safety elements for shaft, door and rope monitoring. Opening one of these switch contacts causes the entire safety circuit to be interrupted. This in turn causes the interruption of the supply for the main drive, the engagement of the brake and thus taking a safe state of rest of the elevator system.
  • a wiring harness of the safety circuit leading to the safety elements and a wiring harness of the safety circuit returning from the safety elements are often located close to one another.
  • a cross-circuit between the leading and returning wiring harness can not be excluded. But a cross-circuit of these line strands has the consequence that all switching contacts are bridged in the intervening wiring harness and thus their switching state can not be detected or are always seen as closed. So far, this could only be prevented by a reliable but relatively complex isolation.
  • US5107964 A discloses a safety circuit according to the preamble of claim 1.
  • the safety circuit for an elevator installation preferably comprises a first circuit with a plurality of switching contacts and a second circuit with a plurality of switching contacts.
  • the switching contacts of the first circuit are connected in series and the switching contact of the second circuit connected in parallel.
  • At least one switching contact of the first circuit is a switching contact of the assigned to the second circle.
  • all switching contact of the first circle are assigned to a switching contact of the second circle.
  • a cross-circuit is reliably detected. Because in the case of a cross-circuit, a current flow or a voltage would be measurable in the second circuit, in which all the switch contacts are open in the operating state. Accordingly, the elevator system would be brought into a safe state of rest.
  • a switching contact of the first circuit forcibly switches the associated switching contact of the second circuit.
  • the security can be additionally increased.
  • a cross-circuit of the cross-circuit can also be done only between two harnesses of the first circle and would therefore not be seen. Thanks to the forced closing of the associated switching contact of the second circuit ensures that even in the bridged region of the safety circuit, at least the switching contact of the second circuit recognizable switched, namely, is closed when the switching contact of the first circle is opened.
  • the elevator system can be brought into a safe state of rest even in this situation.
  • the safety circuit preferably has a logic circuit which monitors the switching state of the first circuit and / or the switching state of the second circuit.
  • the logic circuit is connected to the safety circuit and measures a current or voltage value that is applied to the respective circuit.
  • the logic circuit interrupts at least one voltage or power supply to the main drive and / or brake and / or control.
  • the elevator system is shut down and is in a safe state of rest.
  • a first contactor is associated with the first circle and a second contactor with the second circle.
  • the first and the second contactor is dependent on the voltage or current state of the associated circuit a voltage or power supply to the main drive and / or control and / or brake can be interrupted.
  • the voltage or current supply to the main drive and / or to the brake and / or to the control is interrupted.
  • the voltage or power supply to the main drive and / or the brake and / or the control is interrupted.
  • the invention is also related to an elevator installation with a safety circuit described above.
  • the FIG. 1 shows a safety circuit 1, which is constructed redundantly and has a first circle 2 and a second circle 3.
  • the first circuit 2 comprises a plurality of switching contacts 6.1, 6.2, 6.n, which are connected in series.
  • the second circuit 3 also includes a plurality of switching contacts 5.1, 5.2, 5.n, which are connected in parallel.
  • Each switching contact 6.1 of the first circle 2 is assigned a switching contact 5.1 of the second circle 3.
  • Such a switching contact pair 6.1, 5.1 monitors a state of a safety-relevant component of the elevator, such as a shaft door, a car door, a speed limit system, emergency stop switch or a shaft limit switch.
  • each circuit 2, 3 has 3 switching contacts. Needless to say, the number of switching contacts which comprise the circuits 2, 3 may vary depending on the number of components to be monitored.
  • the switching contacts 6.1, 6.2, 6.n of the first circle 2 are switched to the switching contacts 5.1, 5.2, 5.n of the second circle 3 opposite.
  • the first circuit 2 is in an operating state when all the switching contacts 6.1, 6.2, 6.n are closed.
  • the second circuit 3 then in an operating state, when all the switching contacts 6.1, 6.2, 6.n are open.
  • a switching contact 6.1, 6.2, 6.n of the first circle 2 is opened or a switching contact 5.1, 5.2, 5.n of the second circle 3 is closed, the first and second circuits 2, 3 are each in a safe state.
  • a switching contact 5.1, 5.2, 5.n of the second circuit 3 is preferably forcibly connected via a connection 7.1, 7.2, 7.n by a switching contact 6.1, 6.2, 6.n of the first circuit 2. This ensures that associated switching contacts 6.1, 5.1 simultaneously only in an operating state when the switching contact 6.1 of the first circle 2 is closed and the switching contact 5.1 of the second circle 3 is open, or in a safe state when the switching contact 6.1 of the first circle 2 open and the switching contact 5.1 of the second circle 3 is closed, can be located.
  • the two circles 2, 3 are powered by a 24V power source. It is at the discretion of the skilled person to select a suitable for his purpose voltage source whose voltage for example, at 12V, 36V, 110V, or any other voltage value.
  • a corresponding current flows via the switching contacts 6.1, 6.2, 6.n.
  • a first contactor 8 is connected at the end of the first circuit 2, on the one hand, with the same and, on the other hand, with a 0V conductor.
  • the first contactor 8 comprises a switching magnet 8.1 and a switch 8.2, the latter being integrated in a three-phase supply 10 of a main drive 11.
  • the supply is typically 380V, but may differ from country to country.
  • the solenoid 8.1 switches according to a switching state of the first circuit 2 the associated switch 8.2.
  • the energized solenoid 8.1 keeps the switch 8.2 closed.
  • the switch 8.2 is opened and the supply 10 to the main drive 11 is interrupted. So it is at the switch 8.2 to a Schliesserutton that is open in the normal state or de-energized state.
  • a second contactor 9 is connected at the end of the second circle 3 on the one hand with selbigem and on the other hand with a 0V conductor.
  • the second contactor 9 comprises a switching magnet 9.1 and a switch 9.2, the latter being integrated in the supply 10 of the main drive 11.
  • the solenoid 9.1 switches according to a switching state of the second circuit 3, the associated switch 9.2. In this case, the switch 9.2 is closed as long as the solenoid 9.1 is de-energized.
  • the solenoid 9.1 is powered and opened the associated switch 9.2.
  • the supply 10 to the main drive 11 is interrupted. So it is at the switch 9.2 to a normally closed contact, which is closed in the normal state or de-energized state. Thanks to the parallel connection of the switching contacts 5.1, 5.2, 5.n, the contactor 9 responds when closing each individual switching contact 5.1, 5.2, 5.n.
  • the FIG. 2 shows the safety circuit 1 FIG. 2 in a safe condition.
  • a switching contact 6.n of the first circuit 2 is open and the associated switching contact 5.n of the second circuit 3 is closed. Accordingly, both the first and second circuits 2, 3 assume a safe state.
  • the first contactor 8 and the second contactor 9 interrupt one Supply 10 of the main drive 11. Thus, the elevator system can be transferred to a safe state of rest.
  • FIG. 3 an embodiment of the safety circuit 1 is shown, in which instead of shooters 8, 9, a logic circuit 12 is provided to a first switch 13.1 or second switch 13.2 in the supply 10 of the according to a switching state of the first and / or the second circle Main drive 11 to switch.
  • the logic circuit 12 comprises a first circuit 12.1 connected to the first circuit 2 and a second circuit 12.2 connected to the second circuit 3. Both the first and the second circuit 12.1, 12.2 is connected to a 0V conductor.
  • the safety circuit 1 is in an operating state. All switching contacts 6.1, 6.2, 6.n of the first circle 2 are closed and all switching contacts 5.1, 5.2, 5.n of the second circle 3 are open. Accordingly, a current flows through the first circuit 2 and a current flow via the second circuit 3 is interrupted.
  • the logic circuits 12.1, 12.2 evaluate the incoming current or voltage values and keep the associated switches 13.1, 13.2 closed.
  • a switching contact 6.1 of the first circuit 2 is opened and / or a switching contact 5.1 of the second circuit 3 is closed, the current or voltage value changes in the corresponding circuit 2, 3.
  • the first circuit 12.1 now measures a current or voltage value of Zero and opens the associated switch 13.1 in the supply 10 of the main drive 11.
  • the elevator system be transferred to a safe state of rest.
  • Both switches 13.1, 13.2 designed as a closing contact.
  • only one of the two switches 13.1, 13.2 can be designed as a closing contact and the other switch 13.1, 13.2 as a normally closed contact.

Description

Die Erfindung betrifft einen Sicherheitskreis für das sichere Betreiben einer Aufzugsanlage sowie eine Aufzugsanlage mit einem solchen Sicherheitskreis gemäss den unabhängigen Patentansprüchen.The invention relates to a safety circuit for the safe operation of an elevator system and an elevator system with such a safety circuit according to the independent claims.

Heutige Aufzugsanlagen sind mit einem Sicherheitskreis ausgerüstet. Dieser besteht aus mehreren in Serie geschalteten Schaltkontakten von unterschiedlichen Sicherheitselementen zur Schacht-, Tür- und Seilüberwachung. Das Öffnen eines dieser Schaltkontakte führt dazu, dass der gesamte Sicherheitskreis unterbrochen wird. Dies bewirkt wiederum das Unterbrechen der Speisung für den Hauptantrieb, das Einrücken der Bremse und somit das Einnehmen eines sicheren Ruhezustands der Aufzugsanlage. Um sämtliche Sicherheitselemente im Sicherheitskreis einzugliedern, muss dieser durch den gesamten Schacht und auch über das Hängekabel zur Kabine geführt werden. Als Folge dieser Führung liegen eine zu den Sicherheitselementen hinführender Leitungsstrang des Sicherheitskreises und ein von den Sicherheitselementen rückführender Leitungsstrang des Sicherheitskreises oft nahe beieinander. Ein Querschluss zwischen dem hinführenden und rückführenden Leitungsstrang kann somit nicht ausgeschlossen werden. Ein Querschluss dieser Leitungsstränge hat aber zur Folge, dass sämtliche Schaltkontakte im dazwischenliegenden Leitungsstrang überbrückt werden und somit deren Schaltzustand nicht mehr erkannt werden kann bzw. immer als geschlossen gesehen werden. Bisher konnte dies nur durch eine zuverlässige aber auch relativ aufwändige Isolation verhindert werden.Today's elevator systems are equipped with a safety circuit. This consists of several series-connected switching contacts of different safety elements for shaft, door and rope monitoring. Opening one of these switch contacts causes the entire safety circuit to be interrupted. This in turn causes the interruption of the supply for the main drive, the engagement of the brake and thus taking a safe state of rest of the elevator system. In order to incorporate all safety elements in the safety circuit, it must be routed through the entire shaft and also via the suspension cable to the cabin. As a result of this guide, a wiring harness of the safety circuit leading to the safety elements and a wiring harness of the safety circuit returning from the safety elements are often located close to one another. A cross-circuit between the leading and returning wiring harness can not be excluded. But a cross-circuit of these line strands has the consequence that all switching contacts are bridged in the intervening wiring harness and thus their switching state can not be detected or are always seen as closed. So far, this could only be prevented by a reliable but relatively complex isolation.

US5107964 A offenbart einen Sicherheitskreis gemäß dem Oberbegriff des Anspruchs 1. US5107964 A discloses a safety circuit according to the preamble of claim 1.

Es ist daher Aufgabe der Erfindung, einen Sicherheitskreis für eine Aufzugsanlage zu schaffen, bei welchem ein Querschluss zuverlässig erkannt wird.It is therefore an object of the invention to provide a safety circuit for an elevator system, in which a cross-circuit is reliably detected.

Diese Aufgabe wird mit einem Sicherheitskreis mit den Merkmalen der unabhängigen Patentansprüche gelöst.This object is achieved with a safety circuit having the features of the independent patent claims.

Vorzugsweise umfasst der Sicherheitskreis für eine Aufzugsanlage einen ersten Kreis mit mehreren Schaltkontakten und einen zweiten Kreis mit mehreren Schaltkontakten. Dabei sind die Schaltkontakte des ersten Kreises in Serie geschalten und die Schaltkontakt des zweiten Kreises parallel geschaltet. Mindestens ein Schaltkontakt des ersten Kreises ist einem Schaltkontakt des zweiten Kreises zugeordnet. Bevorzugt sind alle Schaltkontakt des ersten Kreises einem Schaltkontakt des zweiten Kreises zugeordnet.The safety circuit for an elevator installation preferably comprises a first circuit with a plurality of switching contacts and a second circuit with a plurality of switching contacts. The switching contacts of the first circuit are connected in series and the switching contact of the second circuit connected in parallel. At least one switching contact of the first circuit is a switching contact of the assigned to the second circle. Preferably, all switching contact of the first circle are assigned to a switching contact of the second circle.

Hierbei sind zwei einander zugeordnete Schaltkontakte entgegengesetzt geschaltet. Dies bedeutet, dass bei geschlossenem Schaltzustand eines Schaltkontakts des ersten Kreises der Schaltzustand des zugeordneten Schaltkontakts des zweiten Kreises offen ist und umgekehrt. Entsprechend befindet sich der Sicherheitskreis nur dann in einem Betriebszustand, wenn der Schaltzustand aller Schaltkontakte des ersten Kreises geschlossen ist und der Schaltzustand aller Schaltkontakte des zweiten Kreises offen ist.Here, two mutually associated switching contacts are switched opposite. This means that when the switching state of a switching contact of the first circuit is closed, the switching state of the associated switching contact of the second circuit is open and vice versa. Accordingly, the safety circuit is only in an operating state when the switching state of all switching contacts of the first circle is closed and the switching state of all switching contacts of the second circle is open.

Unter Betriebszustand wird hier der Zustand verstanden, in dem ein sicherer Betrieb der Aufzugsanlage gewährleistet ist.Under operating condition is understood here the state in which safe operation of the elevator system is guaranteed.

Dabei ist von Vorteil, dass ein Querschluss zuverlässig erkannt wird. Denn bei einem Querschluss würden im zweiten Kreis, bei dem im Betriebszustand alle Schaltkontakte offen stehen, ein Stromfluss oder eine Spannung messbar sein. Entsprechend würde die Aufzugsanlage in einen sicheren Ruhezustand bringbar sein.It is advantageous that a cross-circuit is reliably detected. Because in the case of a cross-circuit, a current flow or a voltage would be measurable in the second circuit, in which all the switch contacts are open in the operating state. Accordingly, the elevator system would be brought into a safe state of rest.

Unter sicherem Ruhezustand wird hier der Zustand verstanden, in dem sich die Aufzugsanlage befindet, wenn der Sicherheitskreis einen sicheren Zustand eingenommen hat. Der Sicherheitskreis ist dann in einem sicheren Zustand, wenn mindestens ein Schalter des ersten Kreises offen steht oder wenn mindestens ein Schalter des zweiten Kreises, geschlossen ist.Under safe rest state is understood here the state in which the elevator system is when the safety circuit has taken a safe state. The safety circuit is then in a safe state if at least one switch of the first circuit is open or if at least one switch of the second circuit is closed.

Vorzugsweise zwangsschaltet ein Schaltkontakt des ersten Kreises den zugeordneten Schaltkontakt des zweiten Kreises. Dadurch kann die Sicherheit noch zusätzlich erhöht werden. Denn bei einem Querschluss kann der Querschluss auch lediglich zwischen zwei Kabelsträngen des ersten Kreises erfolgen und wäre somit nicht erkennbar. Dank der Zwangsschliessung des zugeordneten Schaltkontakts des zweiten Kreises ist gewährleistet, dass auch im überbrückten Bereich des Sicherheitskreises zumindest der Schaltkontakt des zweiten Kreises erkennbar geschaltet, nämlich geschlossen wird, wenn der Schaltkontakt des ersten Kreises geöffnet wird. Somit ist die Aufzugsanlage auch in dieser Situation in einen sicheren Ruhezustand bringbar.Preferably, a switching contact of the first circuit forcibly switches the associated switching contact of the second circuit. As a result, the security can be additionally increased. Because in a cross-circuit of the cross-circuit can also be done only between two harnesses of the first circle and would therefore not be seen. Thanks to the forced closing of the associated switching contact of the second circuit ensures that even in the bridged region of the safety circuit, at least the switching contact of the second circuit recognizable switched, namely, is closed when the switching contact of the first circle is opened. Thus, the elevator system can be brought into a safe state of rest even in this situation.

Vorzugsweise verfügt der Sicherheitskreis über eine logische Schaltung, die jeweils den Schaltzustand des ersten Kreises und/oder den Schaltzustand des zweiten Kreises überwacht. Dazu ist die logische Schaltung mit dem Sicherheitskreis verbunden und misst einen Strom- bzw. Spannungswert, der am jeweiligen Kreis anliegt.The safety circuit preferably has a logic circuit which monitors the switching state of the first circuit and / or the switching state of the second circuit. For this purpose, the logic circuit is connected to the safety circuit and measures a current or voltage value that is applied to the respective circuit.

Bei identischem Schaltzustand des ersten und des zweiten Kreises oder bei offenem Schaltzustand des ersten Kreises oder bei geschlossenem Schaltzustand des zweiten Kreises unterbricht die logische Schaltung zumindest eine Spannungs- oder Stromversorgung zum Hauptantrieb und/oder Bremse und/oder Steuerung. Somit ist die Aufzugsanlage stillgelegt und befindet sich in einem sicheren Ruhezustand.With identical switching state of the first and the second circuit or with open switching state of the first circle or closed switching state of the second circle, the logic circuit interrupts at least one voltage or power supply to the main drive and / or brake and / or control. Thus, the elevator system is shut down and is in a safe state of rest.

Alternativ dazu ist ein erster Schütz dem ersten Kreis und ein zweiter Schütz dem zweiten Kreis zugeordnet. Mittels des ersten und des zweiten Schützes ist jeweils abhängig vom Spannungs- oder Stromzustand des zugeordneten Kreises eine Spannungs- oder Stromversorgung zum Hauptantrieb und/oder Steuerung und/oder Bremse unterbrechbar. Bei einem Strom- bzw. Spannungsunterbruch im ersten Kreis wird die Spannungs- oder Stromversorgung zum Hauptantrieb und/oder zur Bremse und/oder zur Steuerung unterbrochen. Bei einem Strom- bzw. Spannungsanstieg im zweiten Kreis wird die Spannungs- oder Stromversorgung zum Hauptantrieb und/oder zur Bremse und/oder zur Steuerung unterbrochen.Alternatively, a first contactor is associated with the first circle and a second contactor with the second circle. By means of the first and the second contactor is dependent on the voltage or current state of the associated circuit a voltage or power supply to the main drive and / or control and / or brake can be interrupted. In the event of a current or voltage interruption in the first circuit, the voltage or current supply to the main drive and / or to the brake and / or to the control is interrupted. With a current or voltage increase in the second circuit, the voltage or power supply to the main drive and / or the brake and / or the control is interrupted.

Die Erfindung ist auch auf eine Aufzugsanlage mit einem oben beschriebenen Sicherheitskreis bezogen.The invention is also related to an elevator installation with a safety circuit described above.

Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen besser beschrieben. Es zeigen:

Figur 1
schematisch ein Schaltplan des erfindungsgemässen Sicherheitskreises einer ersten Ausgestaltung in einem Betriebszustand; und
Figur 2
schematisch ein Schaltplan des erfindungsgemässen Sicherheitskreises einer ersten Ausgestaltung in einem sicheren Zustand; und
Figur 3
schematisch ein Schaltplan des erfindungsgemässen Sicherheitskreises einer zweiten Ausgestaltung.
The invention will be described below with reference to exemplary embodiments. Show it:
FIG. 1
schematically a circuit diagram of the inventive safety circuit of a first embodiment in an operating condition; and
FIG. 2
schematically a circuit diagram of the inventive safety circuit of a first embodiment in a safe state; and
FIG. 3
schematically a circuit diagram of the inventive safety circuit of a second embodiment.

Die Figur 1 zeigt einen Sicherheitskreis 1, der redundant aufgebaut ist und über einen ersten Kreis 2 und einen zweiten Kreis 3 verfügt. Der erste Kreis 2 umfasst mehrere Schaltkontakte 6.1, 6.2, 6.n, die in Serie geschaltet sind. Der zweite Kreis 3 umfasst ebenfalls mehrere Schaltkontakte 5.1, 5.2, 5.n, die parallel geschaltet sind. Jedem Schaltkontakt 6.1 des ersten Kreises 2 ist ein Schaltkontakt 5.1 des zweiten Kreises 3 zugeordnet. Ein solches Schaltkontaktpaar 6.1, 5.1 überwacht einen Zustand einer sicherheitsrelevanten Komponente des Aufzugs, wie beispielsweise eine Schachttüre, eine Kabinentüre, ein Geschwindigkeitsbegrenzungssystem, Notstoppschalter oder ein Schachtendschalter. Im gezeigten Beispiel verfügt jeder Kreis 2, 3 über 3 Schaltkontakte. Selbstredend kann die Anzahl der Schaltkontakte, welche die Kreise 2, 3 umfassen, in Abhängigkeit der Anzahl der zu überwachenden Komponenten variieren.The FIG. 1 shows a safety circuit 1, which is constructed redundantly and has a first circle 2 and a second circle 3. The first circuit 2 comprises a plurality of switching contacts 6.1, 6.2, 6.n, which are connected in series. The second circuit 3 also includes a plurality of switching contacts 5.1, 5.2, 5.n, which are connected in parallel. Each switching contact 6.1 of the first circle 2 is assigned a switching contact 5.1 of the second circle 3. Such a switching contact pair 6.1, 5.1 monitors a state of a safety-relevant component of the elevator, such as a shaft door, a car door, a speed limit system, emergency stop switch or a shaft limit switch. In the example shown, each circuit 2, 3 has 3 switching contacts. Needless to say, the number of switching contacts which comprise the circuits 2, 3 may vary depending on the number of components to be monitored.

Die Schaltkontakte 6.1, 6.2, 6.n des ersten Kreises 2 sind zu den Schaltkontakten 5.1, 5.2, 5.n des zweiten Kreises 3 entgegengesetzt geschalten. Der erste Kreis 2 befindet sich in einem Betriebszustand, wenn alle Schaltkontakte 6.1, 6.2, 6.n geschlossen sind. Entsprechend befindet sich der zweite Kreis 3, dann in einem Betriebszustand, wenn alle Schaltkontakte 6.1, 6.2, 6.n geöffnet sind. Wenn ein Schaltkontakt 6.1, 6.2, 6.n des ersten Kreises 2 geöffnet ist oder ein Schaltkontakt 5.1, 5.2, 5.n des zweiten Kreises 3 geschlossen ist befinden sich der erste und der zweite Kreis 2, 3 jeweils in einem sicheren Zustand.The switching contacts 6.1, 6.2, 6.n of the first circle 2 are switched to the switching contacts 5.1, 5.2, 5.n of the second circle 3 opposite. The first circuit 2 is in an operating state when all the switching contacts 6.1, 6.2, 6.n are closed. Accordingly, the second circuit 3, then in an operating state, when all the switching contacts 6.1, 6.2, 6.n are open. When a switching contact 6.1, 6.2, 6.n of the first circle 2 is opened or a switching contact 5.1, 5.2, 5.n of the second circle 3 is closed, the first and second circuits 2, 3 are each in a safe state.

Bevorzugt wird ein Schaltkontakt 5.1, 5.2, 5.n des zweiten Kreises 3 über eine Verbindung 7.1, 7.2, 7.n durch einen Schaltkontakt 6.1, 6.2, 6.n des ersten Kreises 2 zwangsgeschaltet. Damit ist gewährleistet, dass sich zugeordnete Schaltkontakte 6.1, 5.1 gleichzeitig nur in einem Betriebszustand, wenn der Schaltkontakt 6.1 des ersten Kreises 2 geschlossen und der Schaltkontakt 5.1 des zweiten Kreises 3 geöffnet ist, oder in einem sicheren Zustand, wenn der Schaltkontakt 6.1 des ersten Kreises 2 geöffnet und der Schaltkontakt 5.1 des zweiten Kreises 3 geschlossen ist, befinden können.A switching contact 5.1, 5.2, 5.n of the second circuit 3 is preferably forcibly connected via a connection 7.1, 7.2, 7.n by a switching contact 6.1, 6.2, 6.n of the first circuit 2. This ensures that associated switching contacts 6.1, 5.1 simultaneously only in an operating state when the switching contact 6.1 of the first circle 2 is closed and the switching contact 5.1 of the second circle 3 is open, or in a safe state when the switching contact 6.1 of the first circle 2 open and the switching contact 5.1 of the second circle 3 is closed, can be located.

Die beiden Kreise 2, 3 werden von einer 24V Spanungsquelle gespeist. Es liegt im Ermessen des Fachmanns eine für seine Zwecke geeignete Spannungsquelle auszuwählen, deren Spannung abweichend von 24V beispielsweise bei 12V, 36V, 110V oder bei einem beliebigen anderen Spannungswert liegen kann. In einem Betriebszustand des ersten Kreises 2 fliesst ein entsprechender Strom über die Schaltkontakte 6.1, 6.2, 6.n. Ein erster Schütz 8 ist am Ende des ersten Kreises 2 einerseits mit selbigem und andererseits mit einem 0V-Leiter verbunden. Der erste Schütz 8 umfasst einen Schaltmagneten 8.1 und einen Schalter 8.2, wobei letzterer in einer dreiphasigen Speiseversorgung 10 eines Hauptantriebs 11 integriert ist. Die Speiseversorgung liegt typischerweise bei 380V, kann aber länderspezifisch auch davon abweichen. Der Schaltmagnet 8.1 schaltet entsprechend eines Schaltzustands des ersten Kreises 2 den zugeordneten Schalter 8.2. Dabei hält der bestromte Schaltmagnet 8.1 den Schalter 8.2 geschlossen. Sobald ein Schaltkontakt 6.1, 6.2, 6.n des ersten Kreises 2 offen steht und der Stromfluss im ersten Kreis 2 unterbrochen ist, wird die Stromzufuhr zum Schaltmagneten 8.1 unterbrochen. Als Folge wird der zugeordnete Schalter 8.2 geöffnet und die Speiseversorgung 10 zum Hauptantrieb 11 unterbrochen. Es handelt sich also beim Schalter 8.2 um einen Schliesserkontakt, der im Normalzustand bzw. stromlosen Zustand offen steht.The two circles 2, 3 are powered by a 24V power source. It is at the discretion of the skilled person to select a suitable for his purpose voltage source whose voltage for example, at 12V, 36V, 110V, or any other voltage value. In an operating state of the first circuit 2, a corresponding current flows via the switching contacts 6.1, 6.2, 6.n. A first contactor 8 is connected at the end of the first circuit 2, on the one hand, with the same and, on the other hand, with a 0V conductor. The first contactor 8 comprises a switching magnet 8.1 and a switch 8.2, the latter being integrated in a three-phase supply 10 of a main drive 11. The supply is typically 380V, but may differ from country to country. The solenoid 8.1 switches according to a switching state of the first circuit 2 the associated switch 8.2. The energized solenoid 8.1 keeps the switch 8.2 closed. As soon as a switching contact 6.1, 6.2, 6.n of the first circuit 2 is open and the current flow in the first circuit 2 is interrupted, the power supply to the switching magnet 8.1 is interrupted. As a result, the associated switch 8.2 is opened and the supply 10 to the main drive 11 is interrupted. So it is at the switch 8.2 to a Schliesserkontakt that is open in the normal state or de-energized state.

In einem Betriebszustand des zweiten Kreises 3 sind alle dessen Schaltkontakte 5.1, 5.2, 5.n geöffnet. Entsprechend ist der Stromfluss im zweiten Kreis 3 unterbrochen. Ein zweiter Schütz 9 ist am Ende des zweiten Kreises 3 einerseits mit selbigem und andererseits mit einem 0V-Leiter verbunden. Der zweite Schütz 9 umfasst einen Schaltmagneten 9.1 und einen Schalter 9.2, wobei letzterer in der Speiseversorgung 10 des Hauptantriebs 11 integriert ist. Der Schaltmagnet 9.1 schaltet entsprechend eines Schaltzustands des zweiten Kreises 3 den zugeordneten Schalter 9.2. Dabei ist der Schalter 9.2 geschlossen, solange der Schaltmagnet 9.1 unbestromt ist. Wenn ein Schaltkontakt 5.1, 5.2, 5.n des zweiten Kreises 3 geschlossen ist, wird der Schaltmagnet 9.1 mit Strom versorgt und der zugeordnete Schalter 9.2 geöffnet. Entsprechend wird die Speiseversorgung 10 zum Hauptantrieb 11 unterbrochen. Es handelt sich also beim Schalter 9.2 um einen Öffnerkontakt, der im Normalzustand bzw. stromlosen Zustand geschlossen ist. Dank der parallelen Schaltung der Schaltkontakte 5.1, 5.2, 5.n spricht der Schütz 9 beim Schliessen jedes einzelnen Schaltkontakts 5.1, 5.2, 5.n an.In an operating state of the second circuit 3, all its switching contacts 5.1, 5.2, 5.n are open. Accordingly, the current flow in the second circuit 3 is interrupted. A second contactor 9 is connected at the end of the second circle 3 on the one hand with selbigem and on the other hand with a 0V conductor. The second contactor 9 comprises a switching magnet 9.1 and a switch 9.2, the latter being integrated in the supply 10 of the main drive 11. The solenoid 9.1 switches according to a switching state of the second circuit 3, the associated switch 9.2. In this case, the switch 9.2 is closed as long as the solenoid 9.1 is de-energized. When a switching contact 5.1, 5.2, 5.n of the second circuit 3 is closed, the solenoid 9.1 is powered and opened the associated switch 9.2. Accordingly, the supply 10 to the main drive 11 is interrupted. So it is at the switch 9.2 to a normally closed contact, which is closed in the normal state or de-energized state. Thanks to the parallel connection of the switching contacts 5.1, 5.2, 5.n, the contactor 9 responds when closing each individual switching contact 5.1, 5.2, 5.n.

Die Figur 2 zeigt den Sicherheitskreis 1 aus Figur 2 in einem sicheren Zustand. Ein Schaltkontakt 6.n des ersten Kreises 2 ist geöffnet und der zugeordnete Schaltkontakt 5.n des zweiten Kreises 3 ist geschlossen. Entsprechend nehmen sowohl der erste als auch der zweite Kreis 2, 3 einen sicheren Zustand ein. Der erste Schütz 8 sowie der zweite Schütz 9 unterbrechen eine Speiseversorgung 10 des Hauptantriebs 11. Somit kann die Aufzugsanlage in einen sicheren Ruhezustand überführt werden.The FIG. 2 shows the safety circuit 1 FIG. 2 in a safe condition. A switching contact 6.n of the first circuit 2 is open and the associated switching contact 5.n of the second circuit 3 is closed. Accordingly, both the first and second circuits 2, 3 assume a safe state. The first contactor 8 and the second contactor 9 interrupt one Supply 10 of the main drive 11. Thus, the elevator system can be transferred to a safe state of rest.

In Figur 3 wird ein Ausführungsbeispiel des Sicherheitskreises 1 gezeigt, in welchem anstatt Schützen 8, 9 eine logische Schaltung 12 vorgesehen ist, um entsprechend eines Schaltzustands des ersten und/oder des zweiten Kreises 2, 3 einen ersten Schalter 13.1 oder zweiten Schalter 13.2 in der Speiseversorgung 10 des Hauptantriebs 11 zu schalten. Vorzugsweise umfasst die logische Schaltung 12 eine erste Schaltung 12.1, die mit dem ersten Kreis 2 verbunden ist, und eine zweite Schaltung 12.2, die mit dem zweiten Kreis 3 verbunden ist. Sowohl die erste als auch die zweite Schaltung 12.1, 12.2 ist mit einem 0V-Leiter verbunden.In FIG. 3 an embodiment of the safety circuit 1 is shown, in which instead of shooters 8, 9, a logic circuit 12 is provided to a first switch 13.1 or second switch 13.2 in the supply 10 of the according to a switching state of the first and / or the second circle Main drive 11 to switch. Preferably, the logic circuit 12 comprises a first circuit 12.1 connected to the first circuit 2 and a second circuit 12.2 connected to the second circuit 3. Both the first and the second circuit 12.1, 12.2 is connected to a 0V conductor.

In diesem Ausführungsbeispiel steht der Sicherheitskreis 1 in einem Betriebszustand. Alle Schaltkontakte 6.1, 6.2, 6.n des ersten Kreises 2 sind geschlossen und alle Schaltkontakte 5.1, 5.2, 5.n des zweiten Kreises 3 sind geöffnet. Entsprechend fliesst ein Strom über den ersten Kreis 2 und ist ein Stromfluss über den zweiten Kreis 3 unterbrochen. Die logischen Schaltungen 12.1, 12.2 werten die eingehenden Strom- oder Spanungswerte aus und halten die zugeordneten Schalter 13.1, 13.2 geschlossen. Wenn ein Schaltkontakt 6.1 des ersten Kreises 2 geöffnet wird und/oder ein Schaltkontakt 5.1 des zweiten Kreises 3 geschlossen wird, ändert sich der Strom- oder der Spannungswert im entsprechenden Kreis 2, 3. Die erste Schaltung 12.1 misst nun einen Strom- oder Spannungswert von Null und öffnet den zugeordneten Schalter 13.1 in der Speiseversorgung 10 des Hauptantriebs 11. Die zweite Schaltung 12.2 hingegen misst nun einen Strom- oder Spannungswert, der von Null abweicht und öffnet den zugeordneten Schalter 13.2 in der Speiseversorgung 10 des Hauptantriebs 11. Somit kann die Aufzugsanlage in einen sicheren Ruhezustand überführt werden.In this embodiment, the safety circuit 1 is in an operating state. All switching contacts 6.1, 6.2, 6.n of the first circle 2 are closed and all switching contacts 5.1, 5.2, 5.n of the second circle 3 are open. Accordingly, a current flows through the first circuit 2 and a current flow via the second circuit 3 is interrupted. The logic circuits 12.1, 12.2 evaluate the incoming current or voltage values and keep the associated switches 13.1, 13.2 closed. When a switching contact 6.1 of the first circuit 2 is opened and / or a switching contact 5.1 of the second circuit 3 is closed, the current or voltage value changes in the corresponding circuit 2, 3. The first circuit 12.1 now measures a current or voltage value of Zero and opens the associated switch 13.1 in the supply 10 of the main drive 11. The second circuit 12.2, however, now measures a current or voltage value which deviates from zero and opens the associated switch 13.2 in the supply 10 of the main drive 11. Thus, the elevator system be transferred to a safe state of rest.

Im gezeigten Beispiel nach Figur 3 sind beide Schalter 13.1, 13.2 als Schliesserkontakt ausgelegt. Optional kann auch nur einer der beiden Schalter 13.1, 13.2 als Schliesserkontakt und der andere Schalter 13.1, 13.2 als Öffnerkontakt ausgelegt sein.In the example shown FIG. 3 Both switches 13.1, 13.2 designed as a closing contact. Optionally, only one of the two switches 13.1, 13.2 can be designed as a closing contact and the other switch 13.1, 13.2 as a normally closed contact.

Claims (10)

  1. A safety circuit (1) for an elevator system, comprising a first circuit (2) having a plurality of switching contacts (6.1, 6.2, 6.n) and a second circuit (3) having a plurality of switching contacts (5.1, 5.2, 5.n), wherein
    the switching contacts (6.1, 6.2, 6.n) of the first circuit (2) are connected in series and the switching contacts (5.1, 5.2, 5.n) of the second circuit (3) are connected in parallel, characterized in that at least one switching contact (6.1, 6.2, 6.n) of the first circuit (2) is associated with a switching contact (5.1, 5.2, 5.n) of the second circuit (3), and that the switching states of two switching contacts (6.1, 5.1) associated with one another are in opposite switching states.
  2. The safety circuit (1) according to claim 1, characterized in that
    a switching contact (6.1, 6.2, 6.n) of the first circuit (2) forcibly switches the associated switching contact (5.1, 5.2, 5.n) of the second circuit (3).
  3. The safety circuit (1) according to claim 1 or 2, characterized in that
    during an open switching state of a switching contact (6.1, 6.2, 6.n) of the first circuit (2), the switching state of the associated switching contact (5.1, 5.2, 5.n) of the second circuit (3) is closed.
  4. The safety circuit (1) according to claim 1 or 2, characterized in that
    during a closed switching state of a switching contact (6.1, 6.2, 6.n) of the first circuit (2), the switching state of the associated switching contact (5.1, 5.2, 5.n) of the second circuit (3) is open.
  5. The safety circuit (1) according to any one of claims 1 or 2, characterized in that the safety circuit (1) is only in a safe state if the switching state of all switching contacts (6.1, 6.2, 6.n) of the first circuit (2) is closed and the switching state of all switching contacts (5.1, 5.2, 5.n) of the second circuit (3) is open.
  6. The safety circuit (1) according to any one of claims 1 to 5, characterized in that the safety circuit (1) has a logic circuit (12) which monitors in each case the switching state of the first circuit (2) and/or the switching state of the second circuit (3).
  7. The safety circuit (1) according to claim 6, characterized in that
    in the case of an identical switching state of the first and the second circuits (2, 3) or in the case of an open switching state of the first circuit (2) or in the case of a closed switching state of the second circuit (3), the logic circuit (12) interrupts at least one voltage or current supply (10) to the main drive (11) and/or the control and/or causes a brake to engage.
  8. The safety circuit (1) according to any one of claims 1 to 5, characterized in that a first contactor (8) is associated with the first circuit (2) and a second contactor (9) is associated with the second circuit (3), and a voltage or current supply (10) to the main drive (11) and/or the control can be interrupted in each case depending on the voltage or current state of the associated circuit (2, 3) by means of the first and the second contactors (8, 9).
  9. The safety circuit (1) according to claim 8, characterized in that
    in the case of a current or voltage interruption in the first circuit (2), the first contactor (8) interrupts the voltage or current supply (10) to the main drive (11) and/or to the control, and in the case of a current or voltage increase in the second circuit (3), the second contactor (9) interrupts the voltage or current supply (10) to the main drive (11) and/or to the control.
  10. An elevator system comprising a safety system (1) according to any one of the preceding claims.
EP14800042.5A 2013-12-09 2014-11-18 Safety circuit for a lift system Not-in-force EP3080030B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL14800042T PL3080030T3 (en) 2013-12-09 2014-11-18 Safety circuit for a lift system
EP14800042.5A EP3080030B1 (en) 2013-12-09 2014-11-18 Safety circuit for a lift system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13196227 2013-12-09
PCT/EP2014/074941 WO2015086271A1 (en) 2013-12-09 2014-11-18 Safety circuit for an elevator system
EP14800042.5A EP3080030B1 (en) 2013-12-09 2014-11-18 Safety circuit for a lift system

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EP3080030A1 EP3080030A1 (en) 2016-10-19
EP3080030B1 true EP3080030B1 (en) 2018-03-07

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US (1) US10239729B2 (en)
EP (1) EP3080030B1 (en)
CN (1) CN105813972B (en)
ES (1) ES2668868T3 (en)
PL (1) PL3080030T3 (en)
TR (1) TR201807531T4 (en)
WO (1) WO2015086271A1 (en)

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CN105813972B (en) 2017-11-24
US10239729B2 (en) 2019-03-26
PL3080030T3 (en) 2018-08-31
US20170001833A1 (en) 2017-01-05
TR201807531T4 (en) 2018-06-21
CN105813972A (en) 2016-07-27
ES2668868T3 (en) 2018-05-22
WO2015086271A1 (en) 2015-06-18
EP3080030A1 (en) 2016-10-19

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