Elevator

Abstract

The invention relates to an elevator and a method for emergency unlocking of a car door of an elevator. The elevator has a car which can be moved in a shaft and which travels to at least one floor. The car has a car door and a shaft door. The car door has an electrically activatable car door lock and the shaft door has an electrically activatable shaft door lock. The car door lock has a first latch for locking the first car door leaf and an emergency unlocking mechanism. The shaft door has a lock accessible from a floor. And an operator is arranged on the vertical shaft door. The method comprises the following steps: unlocking the vertical shaft door from the floor by manually operating the lock; by operating the lock, the operator moves from a first position to a second position; upon reaching the second position, the emergency unlocking mechanism is operated by the operator, and the car door lock is unlocked by operating the emergency unlocking mechanism in order to thereby unlock the first car door leaf.

Description

Technical Field

[0001] The invention relates to an elevator and a method for emergency unlocking of a car door of an elevator. Background Art

[0002] In an elevator, a car usually moves vertically in a shaft between different floors in a building. It is provided on the floors that passengers can enter and exit the car, or other loads to be transported are loaded into or unloaded from the car. In order to be able to enter the car, a shaft door is arranged on the floor, and the car has a car door for this purpose. The car door and the shaft door together form an openable and closable passage from the car to the floor or from the floor to the car. In order to keep the car door reliably closed during travel, the car door has a car door lock, which locks one or more car door leaves during travel. Similarly, the shaft door includes a shaft door lock, which keeps one or more shaft door leaves locked at least when there is no car.

[0003] Furthermore, the car door has a drive which is designed to open and close the car door leaf. Typically, this movement of the car door leaf is transmitted to the shaft door to be opened respectively on the arrived floor by means of a door coupler. For this purpose, the car door coupler is embedded in the shaft door coupler, and the car door coupler and the shaft door coupler together form the door coupler. Usually, the shaft door coupler has at least one roller which rolls along at least one coupler guide. Alternatively, the reverse is also possible.

[0004] Typically, the door coupler can also unlock the shaft door. For example, US Pat. No. 8,820,485 B2 shows a known door coupler which unlocks the shaft door leaf by opening the door coupler and which also transmits the movement of the car door to the shaft door leaf. To this end, the door coupler includes a mechanism which uses the movement of the door drive of the car to unlock the car door. However, such a mechanism is complex, expensive and prone to errors.

[0005] EP3328769A1 shows an electric actuator for unlocking the car door. This electric drive requires electrical energy to unlock. Therefore, this actuator does not work when the power is off. In the event of a power outage, the car can be moved to the floor by known methods. However, the car door cannot be unlocked and the passengers are still trapped in the car. Summary of the invention

[0006] It is therefore an object of the present invention to provide an emergency unlocking device which allows a car door locked by an electric lock to be unlocked directly from a floor even in the event of a power failure.

[0007] According to a first aspect of the present invention, an elevator achieves this object. The elevator has a car that can be moved in a shaft, and the car travels to at least one floor. The car has a car door, which has at least one first car door leaf, and the elevator has a shaft door, which has at least one first shaft door leaf. The car door has an electrically activatable car door lock, and the shaft door has an electrically activatable shaft door lock. The car door lock has a first latch for locking the first car door leaf. The shaft door has a lock that can be reached from the floor, and the shaft door can be unlocked from the floor by the lock. The lock can be manually operated. The car door lock has an emergency unlocking mechanism, and the emergency unlocking mechanism is effectively connected to at least the first latch of the car door lock. An operator is installed on the shaft door, and the operator can be moved from a first position to a second position by the movement of a key in the lock. The emergency unlocking mechanism can be operated thereby, and the first latch can be brought to the unlocking position by operating the emergency unlocking mechanism and the car door lock can be unlocked thereby, thereby unlocking the first car door leaf.

[0008] According to a second aspect of the invention, a method for emergency unlocking of a car door of an elevator achieves this object. The elevator has a car that can be moved in a shaft and travels to at least one floor. The car has a car door with at least one first car door leaf, and the elevator has a shaft door with at least one first shaft door leaf. The car door has an electrically activatable car door lock, and the shaft door has an electrically activatable shaft door lock. The car door lock has a first latch for locking the first car door leaf and an emergency unlocking mechanism. The shaft door has a lock that can be reached from the floor. An operator is mounted on the shaft door.

[0009] The method comprises the following steps:

[0010] By manually operating the lock, the shaft door is unlocked from the floor,

[0011] By operating the lock, the operator moves from a first position to a second position,

[0012] When the second position is reached, the emergency unlocking mechanism is operated by the operator, and

[0013] The car door lock is unlocked by actuating the emergency unlocking mechanism, so that the first car door leaf is thereby unlocked.

[0014] The possible features and advantages of embodiments of the present invention may be considered to be based on the concepts and discoveries described below, including but not limited to the present invention.

[0015] The travel path of the elevator includes the space in which the car travels during its travel to the floor. The travel path can extend inside the building or outside the building. The shaft door separates the travel path from the space on the floor. This prevents people from falling.

[0016] By means of the invention, a maintenance technician or other person familiar with elevator operation can free a passenger trapped in the elevator. To this end, the maintenance technician inserts a matching key into the lock of the shaft door in order to unlock the shaft door. The key and the lock can be configured so that the operator is already pushed to the second position by merely inserting the key into the lock.

[0017] According to a preferred embodiment, the method for emergency unlocking further comprises the following steps:

[0018] Insert the key into the lock,

[0019] Rotate the key preferably by at least 20°, and

[0020] The car door is unlocked by the operator operating the emergency unlocking mechanism at the car door lock by turning the key.

[0021] The key is preferably designed as a three-edged key. However, the key can also be a structural key. This can be considered advantageous because these key types are widely used, so that many people therefore have the key. Therefore, in an emergency, many people are at the location to rescue passengers from the car. However, it is also possible to design the lock in such a way that it has a cylinder lock, in order to open the cylinder lock a special key matching this is required. This can be considered an advantage because it can be ensured that only authorized persons can enter the shaft.

[0022] Preferably, the shaft door is unlocked by a mechanical operative connection between the lock and the shaft door lock, so that the movement of the key in the lock unlocks the shaft door. However, in contrast to the emergency opening at the car, such a connection is designed as a permanent connection, since the shaft door lock is permanently mounted on the shaft door. The connection that is directly present can therefore be formed, for example, by means of a tie rod, a pressure rod, a Bowden cable or a rod.

[0023] The movement of the key in the lock causes the operator installed on the shaft door to also move from the first position to the second position. The displacement movement can be designed as a linear movement, such as when the cylinder is moved out. The displacement movement can alternatively be designed as an arc, such as it can be realized by the guidance of a parallelogram. The operator is directly moved to the second position by the movement of the key in the lock or by the transmission of the movement (such as by a push rod). In the second position, the operator preferably contacts the emergency unlocking mechanism and operates the emergency unlocking mechanism here. Here, the emergency unlocking mechanism can have a pusher, and the operator can apply a pushing force to the pusher. In addition, the emergency unlocking mechanism can have a connecting plate, which can be operated by the operator. The movement of the pusher or the connecting plate can be transmitted to the car door lock by a rod, a push rod or a Bowden cable, for example. The emergency unlocking mechanism is thus effectively connected to the first latch of the car door lock.

[0024] The door leaf can be configured as a rolling door or a folding door, for example. Preferably, the door leaf is a part of a sliding door, that is, it is configured as a fixed plate-like body that is moved horizontally and vertically to the door passage.

[0025] According to a preferred embodiment, the emergency unlocking mechanism is designed as an emergency unlocking lever. The emergency unlocking lever can be designed as a rod or a tube directly connected to the car door lock. The pushing force applied by the operator to the emergency unlocking lever causes the emergency unlocking lever to move, which causes the car door lock to move and in particular the first latch to move. The emergency unlocking lever is thus effectively connected to the first latch of the car door lock. This is a cost-effective embodiment, because such an elevator has only a few additional components.

[0026] The first car door latch engages with the hook of the first car door leaf, and the hook of the first car door leaf is locked by this engagement of the latch.

[0027] Thus, movement of the operator can cause the car door lock to move in a variety of ways, and this movement causes the car door leaf to unlock.

[0028] Both the first shaft door leaf and the first car door leaf can thus be unlocked by operating the key in the lock. This has the advantage that the shaft door and the car door can now be opened together. And only when both are unlocked is the first car door leaf connected to the first shaft door leaf by the door coupler, so that the car door can be opened together with the shaft door. Thus, the passengers can now leave the car.

[0029] According to a preferred embodiment, the actuator is at a distance from a clearance profile or a clearance profile of the car in the first position.

[0030] The clear space profile of the car describes the space that the car passes through during its travel. In the first position, the operator is at a distance from the clear space profile of the car, which ensures that the operator does not touch the car when the car passes by. Preferably, the operator is arranged in a cavity or pocket in the door arch above the first shaft door leaf. The operator can be located just vertically above the first door leaf in the first position or with a horizontal offset. As a result, the operator is protected from dirt that falls in the shaft.

[0031] According to a preferred embodiment, in the second position, the operator bridges the distance between the shaft door and the car door. Thus, the operator can be effectively connected to the emergency unlocking mechanism. Here, the bridging is preferably carried out by means of an operator designed as a mechanical element.

[0032] According to a preferred embodiment, the car door has a second car door leaf which can be locked by a second locking bar and the emergency unlocking mechanism also brings the second locking bar into the unlocking position.

[0033] According to a preferred embodiment, the shaft door further comprises a second shaft door leaf.

[0034] According to a preferred embodiment, the method for emergency unlocking of a car door further comprises the following steps:

[0035] The second car door leaf is unlocked by operating the emergency unlocking mechanism.

[0036] Thus, the elevator can have a second car door leaf and optionally also a second car door leaf. Preferably, there are as many car door leaves as shaft door leaves per floor. With a plurality of smaller door leaves, the space required for the open door is less than with a large door leaf, and for a given elevator car a larger area can be used as a door passage opening.

[0037] The door leaves, i.e. the car door leaves and / or the shaft door leaves, can be moved telescopically. This means that the first and second car door leaves are moved in the same direction, wherein the first car door leaf moves faster than the second car door leaf, preferably twice as fast. Alternatively, the first and second car door leaves can also be moved to be opened from the center, that is, the first car door leaf and the second car door leaf move away from each other in opposite directions when opening from a door gap in the center of the car door.

[0038] According to a preferred embodiment, the operator is designed as a lever that is rotated in a horizontal plane by turning the key. In a simple embodiment, the operator can thus be designed as a lever that is preferably directly attached to the shaft door lock. The lever can be designed as a metal strip, a rod or a tube. The operator is then rotated in the horizontal plane, the axis of rotation being oriented vertically.

[0039] According to a preferred embodiment, the method for emergency unlocking of a car door further comprises the following steps:

[0040] Turning the key directly causes the operator to turn.

[0041] The rotation of the manipulator is a special case of displacement motion. During rotation, the manipulator rotates around a rotation axis fixed in space.

[0042] For this reason, the operator and the key in the lock preferably have a common axis of rotation. This has the advantage that the operator is directly and fixedly connected to the lock. Thus, no other bearing device or mechanism is needed to transmit the movement of the key to the movement of the operating member.

[0043] According to a preferred embodiment, the operation includes applying a pushing force to the emergency unlocking lever. Therefore, preferably, the pushing force is basically applied by the operator, which presses the operator onto the emergency unlocking mechanism. Alternatively, the operation can also be achieved, for example, by magnetic force. For this purpose, the operating member or the emergency unlocking mechanism has a magnet. The other of the operator or the emergency unlocking mechanism is made of ferromagnetic material or includes at least one component made of ferromagnetic material. The magnet is then used to attract the ferromagnetic component as long as the distance is reduced by operating the key in the lock and unlock the car door lock by the increased attraction force.

[0044] Alternatively, both the emergency unlocking mechanism and the operator can have magnets. These magnets can be polarized so that they repel each other when approached by operating the key in the lock. This repulsive force can also operate the emergency unlocking mechanism.

[0045] According to a preferred embodiment, the car door lock has a rotor which is mounted rotatably about an axis.

[0046] The axis is preferably oriented horizontally. A horizontally oriented axis can be oriented vertically to a vertical cage wall in a simple manner. Furthermore, the movement takes place in a narrow region, which is preferably oriented parallel to the first cage door leaf. Due to the narrow region, the cage door arch can be designed to be more slender and more space is left for the cage interior.

[0047] According to a preferred embodiment, the first locking bolt and the emergency unlocking mechanism are fixedly connected to the rotor. Therefore, the car door lock is basically composed of a single, movably supported main body. This has the advantage that additional joints or mechanisms are eliminated.

[0048] The emergency release lever and the first locking bar can optionally be combined into a common component. Thus, for example, the first locking bar and the emergency release lever can be manufactured from a single workpiece, preferably a metal sheet. Optionally, the same component can also additionally have a part that acts as a counterweight or a counterweight can be fastened to the part. Optionally or alternatively, the second locking bar can be manufactured on the same component.

[0049] According to a preferred embodiment, the rotor has a pre-biasing element, so that the first locking bolt is pre-biased in the direction of the locking position by the pre-biasing element.

[0050] As a result, the first latch is reliably held in engagement with the first car door leaf. The first car door leaf can therefore only be intentionally unlocked by opening the locking device by means of a car door lock drive or an emergency unlocking mechanism. The pre-biasing element can be configured, for example, as a tension spring, a compression spring, a torsion spring or a counterweight. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Further advantages, features and details of the invention are apparent from the following description of exemplary embodiments and from the drawings, in which identical or functionally identical elements are provided with the same reference numerals. The drawings are merely schematic and not drawn to scale.

[0052] Here:

[0053] Figure 1 The upper portion of the car door 200 is shown in front view;

[0054] Figure 2 Shown with unlocked car door lock 203 Figure 1 Same implementation method;

[0055] Figure 3 Shown in side view with Figure 1 Same implementation method;

[0056] Figure 4 The side view shows the shaft door 100 in combination with the shaft door 102 when the shaft door lock 103 is operated. Figure 1 Same implementation method;

[0057] Figure 5 a to Figure 5 c shows other variants of the design of the emergency unlocking mechanism 209, and

[0058] Figure 6 An elevator having a car door 200 and a plurality of car doors 100 is shown. DETAILED DESCRIPTION

[0059] Figure 1 A car door 200 is shown in a closed state, which has a first door leaf 202, 202a movably fixed thereto and a second door leaf 202, 202b movably fixed thereto. Rollers 230 are used to enable the door leaf 202 to be supported on the door arch 221 with low friction. Here, the first door leaf 202a has a first door hook 211, on which a first latch 205 can be engaged to lock the first door leaf in the closed position. The second door leaf 202b similarly has a second door hook 212, on which a second latch 207 can be engaged to lock the second door leaf in the closed position.

[0060] In order to unlock the two door leaves 202, the first latch 205 and the second latch 207 can be twisted together in the clockwise direction as a whole, so that the first latch 205 releases the first car door hook 211 of the first car door leaf 202a and the second latch 207 releases the second car door hook 212 of the second car door leaf 202b. As a result, both door leaves 202 can be freely moved by the door drive or manually by a maintenance technician and thus opened. In this case, the movement of the car door leaf 202 is transmitted to the shaft door coupler 120 via the car door coupler 20, 220 (see Figure 4 ). Usually, unlocking is performed by the electric car door lock driver 201 (see Figure 3 or Figure 4 ).

[0061] In the event of a power outage, the door drive does not work. In this case, the car door lock 203 can be unlocked by the emergency unlocking mechanism 209 of the car door 200. The emergency unlocking mechanism 209 is designed as an emergency unlocking lever 210. By applying a pushing force, i.e., an operating force 500 (see FIG. 5 ) to the emergency unlocking lever 210 from left to right, the emergency unlocking lever 210 is unlocked. Figure 5 ), so that the emergency unlocking rod rotates. Thus, the latch of the door lock 203 is as follows Figure 2 The car door leaf 202 is twisted as shown and unlocked or released for movement.

[0062] Figure 3 The side view shows the situation where the car 600 is parked on the floor 601 so that the shaft door 200 and the car door 100 are facing each other at the same height. Figure 3 Not shown in the figure. The shaft door 100 and the car door 200 basically have a spacing 17 between each other. This spacing 17 is only retracted (unterschreiten) in the area of ​​the door coupler 20 where the shaft door coupler 120 and the car door coupler 220 are connected. The shaft door coupler 120 and the car door coupler 220 are nested in each other so that the first car door leaf 202a and the first shaft door leaf 102a move together. In addition, the vertical movement of the car 600 can be achieved by the shape of the shaft door coupler 120 and the shaft door coupler 220. The door coupler 20 realizes that the first shaft door leaf 102a moves together with the first car door leaf 202a on the floor 601. As Figure 1As shown, the car door leaf 202a is locked. The first shaft door leaf 102a is also locked by the hook 111 of the first shaft door leaf 102a and the first shaft door latch 105. The car door lock 203 is driven by the electric car door drive 201 and can therefore unlock the first car door leaf 202a. The shaft door lock 103 is driven by the electric shaft door lock drive 101 and can therefore unlock the first car door leaf 102a. The car door lock 203 is mounted on the car door arch 221. The shaft lock 103 is mounted on the shaft door arch 121. The lock 11 and the operator 15 are arranged in the shaft door arch 121 so that the operator 15 has a spacing with the clear space contour of the car in the first position. The operator 15 is also protected in the shaft door arch 121 from dirt or falling objects.

[0063] Figure 4 Shown with Figure 1 and Figure 3 The same embodiment, but the situation is: the operator 15 just contacts the emergency unlocking lever 210, that is to say just before opening. The first car door latch 205 is still locked. Figure 4 The following situation is shown, in which a maintenance technician 19 opens the shaft door 100 and the car door 200 located behind the shaft door in order to release the passengers from the car. To this end, the maintenance technician 19 inserts the key 13 into the lock 11. The key can be turned in the lock 11. The rotation of the key is transmitted to the operator, which can now bridge the distance 17 to the car door arch 221 due to the longer lever arm. In the car door arch 221, the operator 15 presses on the emergency unlocking lever 210. The operator 15 and the key 13 in the lock 11 have a common axis of rotation. Therefore, there is no need to convert the movement into a transmission mechanism or a guide rod. Figure 2 , the movement of the car door lock 203 caused by the operator 15 is represented by a rotation arrow.

[0064] The shaft door lock 103 is also unlocked when the key 13 is turned. This can be achieved conventionally (not shown) by a mechanical connection between the lock 11 and the shaft door lock 101. The connection can be realized, for example, as a push rod, which directly or indirectly connects the lock 11 to the shaft door lock 103. Alternatively, however, the shaft door lock 103 can also have a separate emergency unlocking mechanism, for example a separate emergency unlocking lever. As a result, in an emergency, the car door 200 and the shaft door 100 are unlocked in the same way.

[0065] Figure 5Other alternative variants for designing the emergency unlocking mechanism 209 and, independently of this, different design variants of the pre-biasing element 540 are shown. Here, the car door lock 203, the first car door latch 205, the second car door latch 207, the first car door hook 211 and the second car door hook 212 are each designed in the same way. Likewise, an actuating force 500 always acts. This is the actuator 15 (see Figure 4 ) applies pushing force to the emergency unlocking mechanism 209.

[0066] Figure 5 A shows the use of a Bowden cable 501. The operating force 500 presses on the Bowden cable rod 512. On the side opposite to the support 513 of the Bowden cable rod 512, the Bowden cable rod 512 is pulled when the traction rope 511 is operated. The traction rope is guided in a hose 510 to the car door lock 203. The traction rope 511 is connected to the car door lock 203 so that the traction movement on the traction rope 511 unlocks the car door lock 203. Here, the pre-biasing element 540 tensions the traction rope 511 so that when the operating force 500 is released, the emergency unlocking mechanism 209 moves back to the original position again.

[0067] The pre-biasing element 540 is Figure 5 a is shown as a tension spring 541. Alternatively, a compression spring can also be installed. The compression spring must then be installed on the other side so that its force has the same effect.

[0068] Figure 5 b shows an emergency unlocking guide rod 502. Here, the operating force 500 of the operator 15 presses on the pusher 520, which in turn presses on the first guide rod rod 521. This movement is transmitted to the car door lock 203 via the guide rod push rod 522, the guide rod angle piece 523 and the traction line 524.

[0069] The use of the pusher 520 is optional. It is also possible to directly apply the operating force 500 to the first guide rod member 521, thereby omitting the pusher 520.

[0070] The pre-biasing element 540 is Figure 5 b is designed as a rotation spring 542.

[0071] Figure 5 c shows an emergency unlocking connecting plate system 503. Here, the operating force 500 of the operator 15 acts on the connecting plate surface 530. Here, the connecting plate rod 531 rotates around the connecting plate fulcrum 532. This rotation moves the car door lock 203 through the traction line 533 and unlocks the car door leaf 202.

[0072] The pre-biasing element 540 is Figure 5 The design in c is counterweight 543.

[0073] Figure 6 A car 600 is shown with a car door 200. The car is movable in a shaft 603 along a movement direction 602. The movement direction 602 is oriented vertically. The car 600 reaches a plurality of floors 601. The floors are separated from the shaft 603 by shaft doors 100.

[0074] Finally, it should be noted that terms such as "having", "comprising" etc. do not exclude other elements or steps, and terms such as "a" or "an" etc. do not exclude a plurality. Furthermore, it should be noted that features or steps that have been described with reference to one of the above embodiments may also be used in combination with other features or steps of other embodiments described above. Reference signs in the claims should not be considered as limiting.

Claims

1. An elevator, comprising a car (600) capable of moving in a shaft (603), the car traveling to at least one floor (601), in, The car (600) has a car door (200), wherein the car door has at least one first car door leaf (202a), The elevator comprises a shaft door (100) having at least one first shaft door leaf (102a), The car door (200) has an electrically activatable car door lock (203) and the shaft door has an electrically activatable shaft door lock (103), The car door lock (203) has a first latch (205) for locking the first car door leaf (202a). The shaft door (100) has a lock (11) that can be reached from the floor (601), by which the shaft door (100) can be unlocked from the floor (601), and the lock (11) can be manually operated, characterized in that The car door lock (203) has an emergency unlocking mechanism (209), and the emergency unlocking mechanism (209) is operatively connected to at least a first latch (205) of the car door lock (203), and An operator (15) is mounted on the shaft door (100), and the operator can be moved from a first position to a second position by movement of a key (13) in the lock (11), thereby operating an emergency unlocking mechanism (209), and by operating the emergency unlocking mechanism (209), the first latch (205) can be moved into an unlocked position and the car door lock (203) can be unlocked, thereby unlocking the first car door leaf (202a).

2. The elevator according to claim 1, characterized in that The emergency unlocking mechanism (209) is configured as an emergency unlocking lever (210).

3. The elevator according to claim 1 or 2, characterized in that: In the first position, the operator (15) is at a distance (17) from a clearance contour of the car (600).

4. The elevator according to claim 3, characterized in that: In the second position, the operator (15) can bridge a distance (17) between the shaft door (100) and the car door (200).

5. The elevator according to any one of claims 1 to 4, characterized in that: The car door (200) has a second car door leaf (202b), which can be locked by a second latch (207), and the emergency unlocking mechanism (209) also brings the second latch (207) to an unlocking position.

6. The elevator according to claim 5, characterized in that: The shaft door (100) has a second shaft door leaf (102b).

7. The elevator according to any one of claims 1 to 6, characterized in that: The operator (15) is configured as a lever which is rotated in a horizontal plane by the rotation of the key (13).

8. The elevator according to any one of claims 1 to 6, characterized in that: The operation includes applying a pushing force to the emergency release lever.

9. The elevator according to any one of claims 1 to 7, characterized in that: The car door lock (203) has a rotor which is supported so as to be rotatable about an axis.

10. The elevator according to claim 9, characterized in that The first locking bolt (205) and the emergency unlocking mechanism (209) are fixedly connected to the rotor.

11. The elevator according to claim 9 or 10, characterized in that: The rotor has a pre-biasing member (540, 541, 542, 543), so that the first latch (205) is pre-biased toward a locking position by the pre-biasing member (540, 541, 542, 543).

12. A method for emergency unlocking of a car door (200) of an elevator, wherein: The elevator comprises a car (600) which can move in a shaft and travels to at least one floor (601). The elevator car has a car door (200) having at least one first car door leaf (202a), and the elevator has a shaft door (100) having at least one first shaft door leaf (102a), The car door (200) has an electrically activatable car door lock (203) and the shaft door (100) has an electrically activatable shaft door lock (103), The car door lock (203) comprises a first latch (205) for locking the first car door leaf (202a) and an emergency unlocking mechanism (209), and The shaft door (100) has a lock (11) accessible from the floor (601), and An operator (15) is mounted on the shaft door (100). Characterized in that the method comprises the following steps: By manually operating the lock (11), the shaft door (100) is unlocked from the floor (601), By operating the lock (11), the operator (15) moves from the first position to the second position, When the second position is reached, the emergency unlocking mechanism (209) is operated by the operator (15); and The car door lock (203) is unlocked by operating the emergency unlocking mechanism (209), thereby unlocking the first car door leaf (202a).

13. The method for emergency unlocking of a car door (200) according to claim 12, further comprising the following steps: Insert the key (13) into the lock (11), The key (13) is preferably turned at least 20°, and The car door (200) is unlocked in such a manner that the operator (15) operates the emergency unlocking mechanism (209) at the car door lock (203) by turning the key (13).

14. The method for emergency unlocking of a car door according to claim 13, further comprising the following steps: Turning the key (13) directly causes the operating device (15) to turn.

15. The method for emergency unlocking of a car door according to claim 14, further comprising the following steps: The second car door leaf (202b) is unlocked by operating the emergency unlocking mechanism (209).

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