Lift

Description

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

[0002] In an elevator, a cabin typically travels vertically in a shaft between different floors or levels within a building. On each floor, passengers can enter and exit the cabin, and other goods can be loaded into or unloaded. To provide access to the cabin, shaft doors are located on each floor, and the cabin itself has a cabin door. The cabin door and the shaft door together form a closable passageway between the cabin and the floor, or vice versa. To ensure the cabin door remains securely closed during travel, it is equipped with a cabin door lock that engages one or more of the cabin door panels. Similarly, the shaft door has a shaft door lock that keeps one or more of the shaft door panels locked, at least when the cabin is not present.

[0003] The cabin door also features a drive mechanism designed to open and close the cabin door panels. Typically, this movement of the cabin door panels is transferred to the corresponding shaft door on the next floor via a door coupling. For this purpose, a cabin door coupling engages with a shaft door coupling, together forming the door coupling. Often, the shaft door coupling has at least one roller that rolls along at least one coupling guide. Alternatively, the reverse can also occur.

[0004] Typically, the door coupling can also unlock the shaft door. US 8820485 B2, for example, discloses a known door coupling that unlocks a shaft door leaf by spreading the coupling, and also transmits movement from a cabin door to the shaft door leaves. For this purpose, the door coupling has a mechanism that uses movement from the cabin door drive to unlock the cabin door. However, such mechanisms are complex, expensive, and prone to failure.

[0005] EP3328769A1 shows an electric actuator for unlocking a cabin door. Such an electric drive requires electrical energy to unlock. Therefore, this type of actuator will not function during a power outage. In the event of a power outage, the cabin can be moved to a higher floor using known methods. However, the cabin door cannot be unlocked, and the passengers inside remain trapped.

[0006] From US 2020 / 115192 A1, an elevator system with a door coupling is also known, which has a common electric drive for cabin and shaft doors and discloses the features of the introductory part of claim 1.

[0007] Therefore, one task can be seen as providing an emergency release that allows a cabin door locked with an electric lock to be unlocked directly from the floor, even in the event of a power failure.

[0008] According to a first aspect of the invention, an elevator with the features of claim 1 solves the problem. The elevator has a cabin that travels in a shaft and accesses at least one floor. The cabin has a cabin door with at least one first cabin door leaf, and the elevator has a shaft door with at least one first shaft door leaf. The cabin door has an electrically activated cabin door lock, and the shaft door has an electrically activated shaft door lock. The cabin door lock has a first bolt for locking the first cabin door leaf. The shaft door has a lock accessible from the floor, through which the

[0009] The shaft door can be unlocked from the floor. The lock is manually operated. The cabin door lock has an emergency release mechanism, and this mechanism is operatively connected to at least the first bolt of the cabin door lock. An actuator is mounted on the shaft door, which can be moved from a first position to a second position by turning a key in the lock. This activates the emergency release mechanism, which then moves the first bolt into the unlocked position, thus unlocking the cabin door and unlocking the first cabin door panel.

[0010] According to a second aspect of the invention, a method for the emergency unlocking of a cabin door of an elevator with the features of claim 11 solves the problem. The elevator has a cabin that travels in a shaft and accesses at least one floor. The cabin has a cabin door with at least one first cabin door leaf, and the elevator has a shaft door with at least one first shaft door leaf. The cabin door has an electrically actuated cabin door lock, and the shaft door has an electrically actuated shaft door lock. The cabin door lock has a first bolt for locking the first cabin door leaf and an emergency release mechanism. The shaft door has a lock accessible from the floor. An actuator is mounted on the shaft door.

[0011] The procedure includes the steps that The shaft door is unlocked from the floor by manually operating the lock, the actuator is moved from a first position to a second position by operating the lock, the emergency release mechanism is activated by the actuator when the second position is reached, and the cabin door lock is unlocked by operating the emergency release mechanism in order to unlock the first cabin door leaf.

[0012] Possible features and advantages of embodiments of the invention can be considered, among other things and without limiting the invention, as being based on the ideas and findings described below.

[0013] The travel path of an elevator encompasses the space the cabin traverses as it travels to the different floors. It can be located inside a building or on the exterior of a building. Shaft doors separate the travel path from the space on the floor, preventing people from falling.

[0014] Thanks to this invention, a service technician, or anyone else familiar with operating the elevator, can free passengers trapped inside. The technician inserts a suitable key into the lock of the shaft door to unlock it. The key and lock can be designed so that simply inserting the key into the lock moves the actuator to the second position.

[0015] According to a preferred embodiment, the emergency unlocking method further comprises the following steps: that a key is inserted into the lock, that the key is preferably turned by at least 20°, and that the cabin door is unlocked by the operator turning the key to activate the emergency release mechanism on the cabin door lock.

[0016] The key is preferably a triangular key. However, it can also be a construction key. This can be seen as an advantage, since these types of keys are widespread, meaning many people possess one. In an emergency, this allows many people to free the passengers from the cabin. Alternatively, the lock can be designed as a cylinder lock, requiring a special, matching key to open it. This can be advantageous because it ensures that only authorized personnel can enter the shaft.

[0017] The shaft door is preferably unlocked via a mechanical linkage between the lock and the shaft door lock, so that the movement of the key in the lock unlocks the shaft door. Unlike the emergency release on the cabin, these links are permanently installed, as the shaft door lock is permanently attached to the shaft door. Such a direct linkage can be implemented, for example, using a pull rod, a push rod, a Bowden cable, or a lever.

[0018] The movement of the key in the lock causes the actuator attached to the shaft door to move from its first position to a second position. This movement can be, for example, a linear displacement, as when a cylinder extends. Alternatively, the movement can be arc-shaped, as could be achieved, for example, by guiding it through a parallelogram. The actuator is moved into the second position either directly by the movement of the key in the lock or by transmitting this movement, for example, via a push rod. In the second position, the actuator is preferably in contact with the emergency release mechanism and thereby actuates it. The emergency release mechanism can include a push button onto which the actuator can apply a pressure force.Furthermore, the emergency release mechanism can include a cam that can be actuated by the actuator. The movement of the actuator or the cam can be transmitted to the cabin door lock, for example, by a lever, a push rod, or a Bowden cable. The emergency release mechanism is thus operatively connected to the first bolt of the cabin door lock.

[0019] The door leaves can be designed, for example, as roller doors or folding doors. Preferably, the door leaves are part of a sliding door, i.e., designed as fixed, panel-like bodies that are moved horizontally and perpendicularly to a doorway.

[0020] According to a preferred embodiment, the emergency release mechanism is designed as an emergency release lever. The emergency release lever can be designed as a rod or tube that is directly connected to the car door lock. A pressure force exerted on the emergency release lever by the actuator causes the emergency release lever to move, which in turn moves the car door lock and, in particular, the first bolt. The emergency release lever is thus operatively connected to the first bolt of the car door lock. This is a cost-effective embodiment, as such an elevator has only a few additional components.

[0021] The first cabin door bolt engages a hook on the first cabin door leaf, which is locked by this engagement of the bolt.

[0022] The movement of the actuator can therefore lead to a movement of the cabin door lock in several ways, and this movement unlocks the cabin door leaf. Both the first shaft door leaf and the first cabin door leaf can thus be unlocked by turning the key in the lock. This has the advantage that the shaft door and the cabin door can now be opened together. The first cabin door leaf and the first shaft door leaf are connected by the door coupling; only when both are unlocked can the shaft door and the cabin door be opened together. The passengers can now leave the cabin.

[0023] In its first position, the actuator is spaced away from the cabin's clearance profile.

[0024] The clearance profile of the cabin describes the space the cabin traverses during its travel. The fact that the actuator, in its first position, maintains a distance from the cabin's clearance profile ensures that it does not touch the cabin as it passes. Preferably, the actuator is located in a cavity or pocket in the door jamb above the first shaft door leaf. In its first position, the actuator can be positioned exactly vertically above the first door leaf or have a horizontal offset. This protects the actuator from dirt falling into the shaft.

[0025] According to a preferred embodiment, in its second position, the actuator bridges a gap between the shaft door and the cabin door. This allows the actuator to engage with the emergency release mechanism. The bridging is preferably achieved by means of the actuator, which is designed as a mechanical element.

[0026] According to a preferred embodiment, the cabin door has a second cabin door leaf which can be locked by a second bolt, and the emergency release mechanism also brings the second bolt into an unlocked position.

[0027] According to a preferred embodiment, the shaft door also has a second shaft door leaf.

[0028] According to a preferred embodiment, the method for emergency unlocking of a cabin door further comprises the following step: that a second cabin door leaf is unlocked by activating the emergency release mechanism.

[0029] The elevator can therefore have a second cabin door and, optionally, a second shaft door. Preferably, there are the same number of cabin doors as shaft doors per floor. With several smaller doors, the open door requires less space than with one large door, and a larger area can be used as the doorway opening for a given elevator car.

[0030] The door leaves, i.e., the cabin door leaves and / or the shaft door leaves, can move telescopically. This means that the first and second cabin door leaves move in the same direction, with the first cabin door leaf moving faster, preferably twice as fast, as the second cabin door leaf. Alternatively, the first and second cabin door leaves can also open centrally, meaning that when opening, the first and second cabin door leaves move away from each other in opposite directions from a centrally located gap in the cabin door.

[0031] According to a preferred embodiment, the actuator is designed as a lever that is rotated in a horizontal plane by the rotation of the key. In a simple embodiment, the actuator can therefore be designed as a lever, preferably attached directly to the shaft door lock. The lever can be designed as a metal strip, rod, or tube. The actuator then rotates in a horizontal plane, with the axis of rotation being vertically oriented.

[0032] According to a preferred embodiment, the method for emergency unlocking of a cabin door further comprises the following step: that turning the key directly causes the actuator to rotate.

[0033] The rotation of the actuator is a special case of linear motion. During rotation, the actuator turns around a fixed axis of rotation in space.

[0034] For this purpose, the actuator and the key in the lock preferably share a common axis of rotation. This has the advantage that the actuator is directly and rigidly connected to the lock. As a result, no additional bearings or mechanisms are needed to transfer the movement of the key to a movement of the actuator.

[0035] According to a preferred embodiment, the actuation involves applying a pressure force to the emergency release lever. Preferably, the actuator presses on the emergency release mechanism by essentially applying a pressing force. Alternatively, the actuation can also be effected, for example, by a magnetic force. For this purpose, either the actuator or the emergency release mechanism has a magnet. The other part of the actuator or emergency release mechanism is made of a ferromagnetic material or has at least a portion made of ferromagnetic material. The magnet then serves to attract the ferromagnetic part when the key is turned in the lock, and the increasing attractive force unlocks the cabin door lock.

[0036] Alternatively, both the emergency release mechanism and the actuator can contain a magnet. These magnets can be polarized in such a way that they repel each other when approached by turning the key in the lock. This repulsive force can also activate the emergency release mechanism.

[0037] According to a preferred embodiment, the cabin door lock has a rotor which is rotatably mounted about an axis.

[0038] This axis is preferably horizontally oriented. A horizontally oriented axis can be easily aligned perpendicularly to the vertical cabin wall. Furthermore, the movement takes place within a narrow area, preferably parallel to the first cabin door leaf. Because this area is narrow, the cabin door jamb can be designed to be slim, thus leaving more space for the cabin interior.

[0039] According to a preferred embodiment, the first bolt and the emergency release mechanism are rigidly connected to the rotor. Thus, the cabin door lock essentially consists of a single, movably mounted body. This has the advantage that further joints or mechanisms are unnecessary.

[0040] The emergency release lever and the first bolt can optionally be combined into a single component. For example, the first bolt and the emergency release lever can be machined from a single workpiece, preferably a piece of sheet metal. Optionally, this same component can also include a part that acts as a clamping weight or to which the clamping weight can be attached. Optionally or alternatively, the second bolt can be machined onto the same component.

[0041] According to a preferred embodiment, the rotor has a pretensioner such that the first bolt is pretensioned by the pretensioner in the direction of a locked position.

[0042] This ensures that the first bolt is securely engaged with the first cabin door leaf. The first cabin door leaf can therefore only be unlocked intentionally, either by the cabin door lock drive or the emergency release mechanism. A pre-tensioning device can be designed, for example, as a tension spring, a compression spring, a torsion spring, or a tension weight.

[0043] Further advantages, features, and details of the invention will become apparent from the following description of exemplary embodiments and from the drawings, in which identical or functionally equivalent elements are provided with identical reference numerals. The drawings are schematic only and not to scale.

[0044] This shows: Fig. 1 an upper part of a cabin door 200 in a frontal view Fig. 2 the same embodiment as Fig. 1 with unlocked cabin door lock 203 Fig. 3 the same embodiment as Fig. 1 in a side view Fig. 4 the same embodiment as Fig. 1 in combination with a shaft door 100 in a side view when the shaft door lock 103 is operated Fig. 5a bis 5c further variants of the design of the emergency release mechanism 209, and Fig. 6 an elevator with cabin door 200 and several shaft doors 100.

[0045] Fig. 1 Figure 200 shows the cabin door 200 with a first door leaf 202, 202a and a second door leaf 202, 202b, both slidably attached to it, in the closed position. The rollers 230 serve to mount the door leaves 202 on the door jamb 221 with low friction. The first door leaf 202a has a first door hook 211, against which a first bolt 205 can engage to lock the first door leaf in the closed position. Similarly, the second door leaf 202b has a second door hook 212, against which a second bolt 207 can engage to lock the second door leaf in the closed position.

[0046] To unlock the two door leaves 202, the first bolt 205 and the second bolt 207 can be rotated together as a single unit clockwise, so that the first bolt 205 releases the first cabin door hook 211 of the first cabin door leaf 202a and the second bolt 207 releases the second cabin door hook 212 of the second cabin door leaf 202b. This frees both door leaves 202 to be moved and thus opened by a door drive or manually by a service technician. The movement of the cabin door leaves 202 is transmitted via the cabin door couplings 20, 220 to the shaft door couplings 120 (see Fig. 4 ) transferred. Normally, unlocking is carried out via an electric cabin door lock drive 201 (see Fig. 3 or 4 ).

[0047] In the event of a power failure, the door drive will not function. In this case, the cabin door lock 203 can be unlocked by an emergency release mechanism 209 of the cabin door 200. The emergency release mechanism 209 is designed as an emergency release lever 210. By applying a pressure force, i.e., the actuating force 500, (see Fig. 5 ) from left to right, the emergency release lever 210 is turned. This rotates the bolts of the door lock 203, as shown in Fig. 2 shown and the cabin door leaves 202 are unlocked, or rather released for movement.

[0048] Fig. 3 This shows a side view of a situation in which cabin 600 is stopped at floor 601, and therefore shaft door 100 and cabin door 200 are opposite each other at the same height. The rollers are in Fig. 3 Not shown. The shaft door 100 and the cabin door 200 are essentially spaced 17 apart. This space of 17 is reduced only in the area of ​​the door coupling 20, where a shaft door coupling 120 engages with a cabin door coupling 220. The shaft door coupling 120 and the cabin door coupling 220 engage with each other, so that the first cabin door leaf 202a and the first shaft door leaf 102a move together. Furthermore, the shape of the shaft door coupling 120 and the cabin door coupling 220 allows for vertical movement of the cabin 600. The door coupling 20 causes the first shaft door leaf 102a on floor 601 to move together with the first cabin door leaf 202a. The cabin door leaf 202a is, as shown in Fig. 1 The first shaft door leaf 102a is also locked via a hook 111 of the first shaft door leaf 102a and a first shaft door bolt 105. The cabin door lock 203 is driven by the electric cabin door lock drive 201 and can thus unlock the first cabin door leaf 202a. The shaft door lock 103 is driven by the electric shaft door lock drive 101 and can thus unlock the first shaft door leaf 102a. The cabin door lock 203 is mounted on the cabin door jamb 221. The shaft door lock 103 is mounted on the shaft door jamb 121. A lock 11 and the actuator 15 are arranged in the shaft door jamb 121, so that the actuator 15 has a distance from the clearance profile of the cabin in the first position. The actuator 15 is also protected from dirt or falling objects in the shaft door guard 121.

[0049] Fig. 4 shows the same embodiment as the Fig. 1 and Fig. 3 However, this occurs in a situation where the actuator 15 is just touching the emergency release lever 210, i.e., immediately before the lock opens. The first cabin door lock bolt 205 is still locked. Fig. 4 Figure 19 shows the situation in which a service technician opens the shaft door 100 and a cabin door 200 behind it to free passengers from the cabin. To do this, the service 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 actuator, which, due to a long lever arm, can now bridge the gap 17 to the cabin door frame 221. In the cabin door frame 221, the actuator 15 presses on the emergency release lever 210. The actuator 15 and the key 13 in the lock 11 share a common axis of rotation. Therefore, no transmission of the movement to a gear or linkage is necessary. Fig. 2 The movement of the cabin door lock 203 caused by the actuator 15 is represented by the rotation arrow.

[0050] The shaft door lock 103 is also unlocked when the key 13 is turned. This can be achieved conventionally (not shown) via a permanent mechanical connection between the lock 11 and the shaft door lock 101. This connection can, for example, be a push rod that directly or indirectly connects the lock 11 to the shaft door lock 103. Alternatively, the shaft door lock 103 can also have a separate emergency release mechanism, such as a separate emergency release lever. This allows the cabin door 200 and the shaft door 100 to be unlocked simultaneously in an emergency.

[0051] Fig. 5 Figure 1 shows further alternative variants for the design of the emergency release mechanism 209 and, independently thereof, various design variants of a pre-tensioner 540. The cabin door lock 203, the first cabin door bolt 205, the second cabin door bolt 207, the first cabin door hook 211, and the second cabin door hook 212 are all designed identically. An actuating force 500 is always applied. This is the pressure force exerted by the actuator 15 (see Figure 1). Fig. 4 .) applies to the emergency release mechanism 209.

[0052] The Fig. 5a Figure 501 shows the use of a Bowden cable. The actuating force 500 presses on a Bowden cable lever 512. On the side opposite the bearing 513 of the Bowden cable lever 512, the Bowden cable lever 512 pulls on a pull cable 511 when actuated. The pull cable is guided in a tube 510 to the cabin door lock 203. The pull cable 511 is connected to the cabin door lock 203 in such a way that a pulling movement on the pull cable 511 unlocks the cabin door lock 203. The tensioner 540 tensions the pull cable 511 so that the emergency release mechanism 209 is returned to its original position when the actuating force 500 is released.

[0053] The pre-lead 540 is in the Fig. 5a shown as a tension spring 541. Alternatively, a compression spring could also be installed. This would then have to be installed on the other side so that its force has the same effect.

[0054] The Fig. 5b Figure 502 shows an emergency release linkage. The actuating force 500 presses on a push button 520, which in turn presses on a first linkage lever 521. The movement is transmitted via the linkage push rod 522, a linkage angle 523 and a pull wire 524 to the cabin door lock 203.

[0055] The use of the push button 520 is optional. It is also possible to apply the actuating force 500 directly to the first linkage lever 521, thus omitting the push button 520.

[0056] The pre-lead 540 is in the Fig. 5b designed as a torsion spring 542.

[0057] The Fig. 5c Figure 1 shows an emergency release cam system 503. The actuating force 500 of the actuator 15 acts on a cam surface 530. This causes a cam lever 531 to rotate about a cam pivot point 532. This rotation moves the cabin door lock 203 via a pull wire 533 and unlocks the cabin door leaves 202.

[0058] The pre-lead 540 is in the Fig. 5c designed as a tension weight 543.

[0059] The Fig. 6 Figure 1 shows a cabin 600 with a cabin door 200. This cabin is movable in a shaft 603 along a travel direction 602. The travel direction 602 is vertically oriented. The cabin 600 travels to several floors 601. The floors are separated from the shaft 603 by shaft doors 100.

[0060] Finally, it should be noted that terms such as "comprising," "encompassing," etc., do not exclude other elements or steps, and terms such as "a" or "an" do not exclude a plurality. Furthermore, it should be noted that features or steps described with reference to one of the above embodiments may also be used in combination with other features or steps from other embodiments described above. Reference numerals in the claims are not to be considered as limitations.

Claims

1. An elevator comprising a car (600) that can move in a shaft (603) and moves to at least one floor (601), the car (600) having a car door (200) with at least a first car door leaf (202a), the elevator having a shaft door (100) with at least a first shaft door leaf (102a), the car door (200) having an electrically activatable car door lock (203) and the shaft door having an electrically activatable shaft door lock (103), the car door lock (203) having a first latch (205) for locking the first car door leaf (202a), the shaft door (100) having a lock (11) that is accessible from the floor (601) and by means of which the shaft door (100) can be unlocked from the floor (601), and the lock (11) being manually actuatable, the car door lock (203) has an emergency release mechanism (209), and the emergency release mechanism (209) is operatively connected to at least the first bolt (205) of the car door lock (203), and an actuator (15) is attached to the shaft door (100) which can be moved from a first position to a second position by moving a key (13) in the lock (11), thereby actuating the emergency release mechanism (209), by actuating the emergency release mechanism (209), the first bolt (205) can be brought into an unlocked position and the car door lock (203) can thereby be unlocked in order to unlock the first car door leaf (202a), characterized in that the shaft door (100) and the car door (200) are at a substantial distance (17) from one another, and the distance (17) is only not maintained in a region of a door coupling (20), in which a shaft door coupling (120) engages with a car door coupling (220), and the shaft door coupling (120) and the car door coupling (220) engage with one another such that the first car door leaf (202a) and the first shaft door leaf (102a) move collectively, a vertical movement of the car (600) is made possible by the shape of a shaft door coupling (120) and a car door coupling (220), the door coupling (20) causes the first shaft door leaf (102a) on the floor (601) to be moved together with the first car door leaf (202a), the car door leaf (202a) is locked, the first shaft door leaf (102a) is locked via a hook (111) of the first shaft door leaf (102a) and a first shaft door latch (105), the car door lock (203) is driven by an electric car door lock drive (201), and the car door lock (203) can thus unlock the first car door leaf (202a), and the shaft door lock (103) is driven by an electric shaft door lock drive (101), and the shaft door lock (103) can thus unlock the first shaft door leaf (102a), and the car door lock (203) is attached to the car door transom (221), and the shaft door lock (103) is attached to a shaft door lintel (121), and the lock (11) and the actuator (15) are arranged in the shaft door lintel (121) such that the actuator (15) is at a distance from the clearance profile of the car in the first position.

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

3. The elevator according to claim 1 or claim 2, characterized in that the actuator (15) can bridge a distance (17) between the shaft door (100) and the car door (200) in the second position.

4. The elevator according to any one of claims 1 to 3, characterized in that the car door (200) has a second car door leaf (202b) which can be locked by a second latch (207), and in that the emergency release mechanism (209) also brings the second latch (207) into an unlocked position.

5. The elevator according to claim 4, characterized in that the shaft door (100) has a second shaft door leaf (102b).

6. The elevator according to any one of claims 1 to 5, characterized in that the actuator (15) is designed as a lever, which is rotated in a horizontal plane by turning the key (13).

7. The elevator according to any one of claims 1 to 5, characterized in that the actuation involves applying a pressure force to the emergency release lever.

8. The elevator according to any one of claims 1 to 7, characterized in that the car door lock (203) has a rotor, which is mounted so as to rotate about an axis.

9. The elevator according to claim 8, characterized in that the first latch (205) and the emergency release mechanism (209) are rigidly connected to the rotor.

10. The elevator according to either claim 8 or claim 9, characterized in that the rotor has a pretensioner (540, 541, 542, 543), such that the first latch (205) is pretensioned by the pretensioner (540, 541, 542, 543) toward a locked position.

11. A method for emergency unlocking a car door (200) of an elevator, the elevator having a car (600) which can move within a shaft and which moves to at least one floor (601), the car (600) having a car door (200) with at least a first car door leaf (202a) and the elevator having a shaft door (100) with at least a first shaft door leaf (102a), the car door (200) having an electrically activated car door lock (203) and the shaft door (100) having an electrically activated shaft door lock (103), the car door lock (203) having a first latch (205) for locking the first car door leaf (202a) and an emergency release mechanism (209), and the shaft door (100) having a lock (11) that is accessible from the floor (601), and an actuator (15) being attached to the shaft door (100), and the shaft door (100) and the car door (200) having a substantial distance (17) from one another, and the distance (17) only not being maintained in a region of a door coupling (20) in which a shaft door coupling (120) engages with a car door coupling (220), and the shaft door coupling (120) and the car door coupling (220) engaging with one another such that the first car door leaf (202a) and the first shaft door leaf (102a) collectively move, a vertical movement of the car (600) is made possible by the shape of a shaft door coupling (120) and a car door coupling (220), the door coupling (20) causes the first shaft door leaf (102a) on the floor (601) to be moved together with the first car door leaf (202a), the car door leaf (202a) is locked, the first shaft door leaf (102a) is locked via a hook (111) of the first shaft door leaf (102a) and a first shaft door latch (105), the car door lock (203) is driven by an electric car door lock drive (201), and the car door lock (203) can thus unlock the first car door leaf (202a), and the shaft door lock (103) is driven by an electric shaft door lock drive (101), and the shaft door lock (103)can thus unlock the first shaft door leaf (102a), and the car door lock (203) is attached to the car door transom (221), and the shaft door lock (103) is attached to a shaft door lintel (121), and the lock (11) and the actuator (15) are arranged in the shaft door lintel (121), such that the actuator (15) is at a distance from the clearance profile of the car in the first position, characterized in that the method comprises the following steps: - the shaft door (100) is unlocked from the floor (601) by the lock (11) being manually actuated, - the actuation of the lock (11) moves the actuator (15) from a first position to a second position, - when the second position is reached, the actuator (15) actuates the emergency unlocking mechanism (209), and - the actuation of the emergency release mechanism (209) unlocks the car door lock (203) is unlocked in order to unlock the first car door leaf (202a).

12. The method for emergency unlocking a car door (200) according to claim 11, further comprising the steps of: - a key (13) is inserted into the lock (11), - the key (13) is turned, preferably by at least 20°, and - the car door (200) is unlocked by the actuator (15) actuating the emergency release mechanism (209) on the car door lock (203) by turning the key (13).

13. The method for emergency unlocking a car door according to claim 12, further comprising the step of: - the turning of the key (13) directly causes a rotation of the actuator (15).

14. The method for emergency unlocking a car door according to claim 13, further comprising the step of: - a second car door leaf (202b) is unlocked by actuating the emergency release mechanism (209).