WO2013153044A1

WO2013153044A1 - Monitoring device of an elevator system

Info

Publication number: WO2013153044A1
Application number: PCT/EP2013/057330
Authority: WO
Inventors: Philippe Henneau
Original assignee: Inventio Ag
Priority date: 2012-04-12
Filing date: 2013-04-08
Publication date: 2013-10-17
Also published as: EP2836453A1; ES2576118T3; EP2836453B1

Abstract

The invention relates to an elevator system (22) comprising a monitoring device (2) for monitoring shaft doors ((4a, 4b, 4c), the elevator system (22) having an elevator car (26) that can be displaced inside a hoistway (24). The elevator system comprises a shaft door contact switch (6a) arranged on one of the shaft doors (4a), and a safety-relevant circuit (8), preferably a safety circuit (8'), which monitors a position of the shaft doors (4a, 4b, 4c) by means of the shaft door contact switch (6a), characterized in that the elevator system (22) additionally comprises a monitoring circuit (10) for monitoring the hoistway (24), which is independent of the safety-relevant circuit (8). The elevator system (22) can be put in a safety mode by means of the monitoring circuit (10) when the shaft door contact switch (6a) is open and the elevator car (26) is not at the height level of the shaft door (4a). The invention also relates to a method for operating said elevator system (22).

Description

Monitoring device of an elevator installation

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.

The object of the invention is therefore to equip an elevator installation with an improved monitoring device.

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.

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.

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.

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-related circuit in this case causes a continuation of 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.

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. This safety mode preferably remains beyond the time when the hoistway door contact switch is closed. In this way, despite reclosing or re-locking the shaft door, the person who has entered the elevator shaft is protected from injury. A continuation of normal operation is only possible 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.

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 safety be formed such that a traversing speed, which is applied in the safety mode, compared to the normal operation of the elevator car is reduced.

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.

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.

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.

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 quickly be made aware of the emergency stop button.

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. In a further 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 landing door if the elevator car is arranged so that it can be entered through this landing door.

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.

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.

In the following the invention will be explained in more detail with reference to figures. Show it:

FIG. 1 shows an elevator installation with a safety-related circuit;

2 shows a circuit diagram of an elevator installation with a monitoring device, FIG. 3 shows a lower part of an elevator shaft of the elevator, and FIG

FIG. 4 shows a further circuit diagram of an elevator installation with a monitoring device.

FIG. 1 shows an elevator installation 22 with a safety-relevant circuit 8. The elevator installation 22 has an elevator shaft 24 with shaft doors 4a, 4b, 4c and an elevator cage 26 which can be moved in the elevator shaft 24. 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 an elevator 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.

Figures 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 arranged by way of example in the elevator installation 22 according to FIG. 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. When the first shaft door contact switch 6a is opened, the circuit of the monitoring switch 14.2 causes the elevator installation 22 to be placed in a safety mode if the elevator car described in FIG. 1 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 carries out the switching operations of the first shaft door contact switch 6a as equally as if the first shaft door were open. contact switch 6a arranged within the safety-related circuit 8.

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.

Figure 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 can be arranged in the immediate vicinity of the emergency stop button 18 or on the emergency stop button 18 within the elevator shaft, the emergency stop button 18 can be reached by a boarded by the first shaft door 4a in the elevator shaft person. 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 variant 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.

When the first shaft door contact switch 6a is opened and the bridging contact 44 is not bridged by the bridging element 45 at the same time, 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 shaft 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, whereby the shaft pit 28 passes through it directly on it arranged shaft door 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 the first shaft door 4a relevant elements of the monitoring device 2 Üb can be arranged in a monitoring box 48.

Alternatively to the integration of the manhole located directly at the shaft pit 28 door 4a may also be involved several shaft doors of the elevator system in a control circuit of a erfmdungsgemässen monitoring device to protect, for example, a person located on the cabin roof of the elevator car person. 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

claims

1. Elevator installation (22) with a monitoring device (2) for monitoring shaft doors (4a, 4b, 4c), wherein the elevator installation (22) has an elevator shaft (24) movable elevator car (26), with

a shaft door contact switch (6a) which is arranged on one of the shaft doors (4a), and

a safety-related circuit (8), preferably a safety circuit (8 ') which monitors a position of the shaft doors (4a, 4b, 4c) by means of the shaft door contact switch (6a), characterized in that the elevator installation (22) additionally one of the safety-relevant circuit (8) independent monitoring circuit (10) for monitoring the elevator shaft (24), wherein the elevator installation (22) is set by the monitoring circuit (10) in a safety mode, when the shaft door contact switch (6a) is open and the elevator car (26) not is arranged at the height of the shaft door (4a).

2. Elevator installation according to claim 1, wherein the safety mode is designed such that a travel path of the elevator car (26) of the safety system located in the elevator installation (22) relative to a travel path of the elevator car of the normally operating elevator installation (26) is limited or the safety mode causes a stop of the elevator car (26).

3. elevator installation according to one of the preceding claims, wherein the safety mode is designed such that it is resistant to a closure of the shaft door contact switch (6a).

4. elevator installation (22) according to any one of the preceding claims, wherein the shaft door contact switch (6a) is exclusively opened when the shaft door (4a) is in the unlocked or open position.

5. elevator installation (22) according to one of the preceding claims, with a shaft door contact switch (6a) having control circuit (12), wherein the control circuit (12) through the shaft door contact switch (6a) switchable switching element (14), preferably a contactor or relay, wherein a switching operation of Shaft door contact switch (6a) by means of this switching element (14) causes a switching operation in the safety-related circuit (8) and a switching operation in the monitoring circuit (10).

6. elevator installation (22) according to one of the preceding claims, wherein the elevator installation (22) in the monitoring circuit (10) arranged signal generator (16) and arranged in the elevator shaft emergency stop button (18), wherein the signal generator (16) the emergency stop button (18) is arranged and the signal generator (16) in the safety mode triggered by the monitoring circuit (10) generates a signal which is preferably acoustic or visual.

7. elevator installation (22) according to claim 4, wherein the emergency stop button (18) in a shaft pit (28) is arranged.

8. elevator installation (22) according to any one of the preceding claims, wherein the shaft door (4a) at a / the pit (28) is arranged.

9. elevator installation (22) according to claim 4, wherein the emergency stop button (18) on a car roof (31) of the elevator car (26) is arranged.

10. elevator installation (22) according to one of the preceding claims, wherein the monitoring circuit (10) comprises a monitoring switch (14.2), wherein the monitoring switch (14.2) in a switching operation of the shaft door contact switch (6a) is actuated and by means of a bridging contact (44) at a Arrangement of the elevator car (26) at the height of the shaft door (4a) is bridged.

11. A method for operating an elevator installation (22) with a monitoring device (2), wherein the elevator installation (22) has an elevator car (24) movable elevator car (26) and shaft doors (4a, 4b, 4c), wherein:

a shaft door contact switch (6a) which is arranged on one of the shaft doors (4a) of the elevator installation (22) is opened, and

a safety relevant circuit (8, 8 ') based on the detected opening of the

Shaft door contact switch (6a) is affected, and in addition

one of the safety-related circuit (8) independent monitoring circuit (10) is influenced based on the detected opening of the shaft door contact switch (6a),

wherein the elevator installation (22) is put into a safety mode by the monitoring circuit (10) when the landing door contact switch (6a) is open and the elevator car (26) is not located at the height of the landing door (4a).

12. The method of claim 9, wherein the by means of the monitoring circuit (10) activated safety mode at a closure of the shaft door contact switch (6a) remains.

13. The method according to any one of claims 11 or 12, wherein the security mode is automatically triggered.

14. Method according to claim 11, wherein a preferably acoustic or visual signal is generated by the monitoring circuit, wherein the signal is suitable for a person to call an emergency stop button (18) of the monitoring device (FIG. 2) to draw attention.

15. The method according to any one of claims 11 to 14, wherein the shaft door contact switch (6a) of a shaft pit (28) arranged shaft door (4a) is monitored.