DOOR SYSTEM FOR A LIFT CABIN, LIFT SYSTEM AND METHOD FOR EVACUATING A LIFT CABIN

Description

[0001] The present invention relates to a door system for an elevator car. Furthermore, the invention relates to an elevator system comprising at least one elevator car equipped with such a door system, and to a method for evacuating an elevator car equipped with such a door system.

[0002] An elevator car, such as those used for transporting people or goods in buildings, can include a car opening and a sliding door mechanism that opens or closes the car opening to the respective floors of the building by horizontally sliding one or more door panels. In addition to the car opening, the elevator car can have a separate emergency exit through which the car can be evacuated in an emergency.

[0003] US 1,852,608 and CN 206278802 U each disclose elevator doors designed to open substantially the entire width of a cabin wall as a doorway. This is achieved by telescopically retracting the door to one-third or one-half the width of the doorway, and then swinging the retracted door section outward onto the landing. This allows the door to be opened to substantially the entire width of the cabin when needed. This makes it possible, for example, to load large pieces of furniture into the cabin.

[0004] US 9,284,159 B2 shows an example of a separate side emergency opening that can be closed via a swing door.

[0005] In elevators without such an emergency release, evacuation can be carried out via the cabin opening. However, it can happen that in the event of a malfunction, the elevator car becomes stuck at a point in the elevator shaft where the door leaf(s) cannot be opened, or not far enough, for example, because the path of movement is blocked by a beam located in the elevator shaft.

[0006] Therefore, there may be a need for an improved door system for an elevator car that allows evacuation via the car opening even if sliding open the door leaf or door leaves is not possible for any reason.

[0007] Furthermore, there may be a need for a suitable elevator system and a suitable procedure for evacuating an elevator car.

[0008] These needs can be met by the subject matter of the independent claims. Advantageous embodiments are set forth in the dependent claims, the following description, and the accompanying figures.

[0009] A first aspect of the invention relates to a door system for an elevator car that is movable in an elevator shaft between several floors and has at least one car opening. The door system comprises at least one door leaf for closing at least a partial area of ​​the car opening and a bearing device designed to mount the door leaf on the elevator car so as to be slidable and rotatable about a pivot axis in the direction of a displacement axis between an open position, in which the door leaf releases the partial area, and a closed position, in which the door leaf closes the partial area. This allows the door leaf, when moved into the closed position and / or an intermediate position between the open and closed positions, to be rotated into an emergency opening position in which the car opening is sufficiently cleared to allow the elevator car to be evacuated through the car opening.

[0010] Thus, with relatively little design effort, it is possible to at least partially release the cabin opening (without destructive force) even if the movement of the door leaf(s) is blocked for any reason, for example, because the elevator car has come to an unfavorable stop at the level of a beam crossing the elevator shaft. This could, for example, be a retaining clip of the guide rail.

[0011] A second aspect of the invention relates to an elevator system. The elevator system comprises an elevator shaft and at least one elevator car, which is movable in the elevator shaft between several floors and has at least one car opening. The elevator car comprises at least one door system, as described above and below, wherein the door leaf is displaceable via the bearing device on the elevator car in the direction of the axis of movement between the open and closed positions and is additionally rotatably mounted about the axis of rotation.

[0012] A third aspect of the invention relates to a method for evacuating an elevator car of an elevator system as described above and below. The method comprises at least the following step: when the elevator car is to be evacuated via the car opening and the door leaf is moved into the closed position and / or an intermediate position between the open and closed positions (and, for example, blocked therein): rotating the door leaf about its axis of rotation into an emergency opening position in which the car opening is sufficiently cleared to allow the elevator car to be evacuated via the car opening.

[0013] Features of the procedure may also be features of the door system and / or elevator system described above and below, and vice versa.

[0014] Without limiting the scope of the invention in any way, embodiments of the invention may be considered to be based on the ideas and findings described below.

[0015] The cabin opening can be the main opening of the elevator car, through which passengers can enter and / or exit the elevator car from a floor during normal operation. The cabin opening may, for example, be opposite a door opening in a side wall of the elevator shaft when the elevator car is normally stopped at a floor. The elevator car may also have multiple cabin openings, for example, opposite each other, with each cabin opening potentially combined with a door system as described above and below.

[0016] The axis of rotation can, for example, be orthogonal to the axis of translation. For instance, the axis of rotation in the operational state of the elevator car can be a vertical axis.

[0017] The pivot axis can, for example, be moved together with the door leaf in the direction of the sliding axis (see also below).

[0018] The axis of rotation can intersect the axis of movement or be offset laterally, for example horizontally, from the axis of movement. The orientation of the axis of rotation relative to the axis of movement can remain constant when the door leaf moves between the open and closed positions. However, it is also conceivable that the lateral offset of the axis of rotation relative to the axis of movement can change depending on the movement path of the door leaf.

[0019] The door leaf can only be mounted to rotate around a single axis. However, designs are also conceivable in which the door leaf can be mounted to rotate or pivot around two or more axes.

[0020] For example, the door leaf can comprise several sliding door leaf segments, each of which can also be mounted to rotate around its own axis of rotation. Such an embodiment would allow a door leaf that is not completely closed, in particular a door leaf in the middle between the open and closed positions, to be rotated around its axis of rotation into an emergency opening position.

[0021] According to one embodiment, the mounting device can comprise at least one hinged part and at least one sliding part. The sliding part can be mounted on the elevator car so as to be slidable in the direction of the axis of movement between the open and closed positions, and the hinged part can be mounted on the sliding part so as to be rotatable about the axis of rotation, so that the hinged part is slidable together with the sliding part. Furthermore, the door leaf can be attached to the hinged part so that the door leaf is rotatable together with the hinged part.

[0022] The folding and / or sliding part can be made in one or more parts, for example in the form of an elongated profile or a strip.

[0023] The sliding part can, for example, be designed as a guide shoe for guidance in a corresponding guide rail, which can be arranged above and / or below the cabin opening.

[0024] The hinged section can be attached to the door leaf as a separate part, for example by screwing and / or welding. However, the hinged section can also be integrated into the door leaf; that is, both can be different sections of one and the same single-piece manufactured component.

[0025] According to one embodiment, the hinged part can be elongated and rotatably connected to the sliding part at its first end. For example, the longitudinal axis of the (elongated) hinged part can run horizontally when the elevator car is in operation. It is possible that the longitudinal axis of the hinged part runs parallel to the sliding axis in a starting position and forms an obtuse, acute, or right angle with the sliding axis in the emergency opening position.

[0026] Similarly, the sliding element can be elongated and have a longitudinal axis that runs horizontally when the elevator car is in operation. The orientation of the sliding element's longitudinal axis relative to the sliding axis can remain constant or vary during movement between the open and closed positions. This allows the bearing mechanism to be implemented with minimal design effort. Consequently, the door system can be easily retrofitted.

[0027] According to one embodiment, the hinged section can be rotatably connected to the sliding section via a bearing bolt that engages partially in the hinged section and partially in the sliding section. For example, the longitudinal axis of the bearing bolt can lie on the pivot axis when the door system is assembled. Such a mounting is robust and allows for easy (dis)assembly of the door system. Alternatively or additionally, the hinged section can be rotatably mounted via at least one hinge.

[0028] According to one embodiment, the hinged section can be locked to the sliding section, whereby rotation of the hinged section around its axis of rotation is prevented when locked and permitted when unlocked. This prevents the hinged section, and thus the door leaf, from being unintentionally rotated into the emergency opening position.

[0029] According to one embodiment, the hinged part can be locked to the sliding part by means of at least one locking bolt, wherein, in the locked state, the locking bolt engages partially in the hinged part and partially in the sliding part, and, in the unlocked state, engages neither the hinged part nor the sliding part, or neither the hinged part nor the sliding part. The locking bolt can engage in a corresponding locking receptacle on the hinged and / or sliding part, for example, in the form of a locking opening. Accordingly, the hinged part can be unlocked by moving the locking bolt out of the locking receptacle. Locking and / or unlocking can be performed manually and / or automatically.

[0030] According to one embodiment, the locking bolt can engage a second end of the hinged section when locked. The hinged section can, for example, extend over the entire width or a large part of the width of the door leaf, where "width" can be understood as the horizontal extent of the door leaf when the elevator car is in operation. In other words, the bearing bolt and the locking bolt can be arranged at opposite ends of the door leaf, either horizontally or in the direction of the width of the door leaf.

[0031] According to one embodiment, the locking bolt can be displaceable, in particular slidable, between an unlocking position corresponding to the unlocked state and a locking position corresponding to the locked state. The locking bolt can be coupled to a spring mechanism, which may be designed to apply a restoring force acting in the direction of the locking position to the locking bolt coupled to the spring mechanism. For example, in the operational state of the elevator car, the locking bolt may have a longitudinal axis parallel or orthogonal to the longitudinal axis of the bearing bolt and / or to the axis of rotation. However, other orientations of the locking bolt are also possible. The unlocking and locking positions can be predetermined by a corresponding mechanical stop. The restoring force can be a spring force applied via at least one spring.Thus, the locking bolt can only be moved from the locked to the unlocked position by overcoming the restoring force. This prevents the folding part from being unintentionally unlocked, for example, due to mechanical vibrations. Furthermore, the restoring force causes the locking bolt to automatically return to the locked position when released, simplifying the locking process.

[0032] According to one embodiment, the locking bolt can be connected to an elongated pull rod and moved from the locked to the unlocked position by pulling on the pull rod connected to the locking bolt. The pull rod can be a flexible, sufficiently tensile-strength material such as a rope or wire. The pull rod can be accessible from inside and / or outside the elevator car when the door system is installed. For example, the pull rod can be appropriately protected against unauthorized access during normal operation of the elevator. Such a locking and operating mechanism requires very little maintenance and space.

[0033] According to one embodiment, the mounting device can further comprise a further hinged part and a further sliding part. The further sliding part can be mounted on the elevator car so as to be slidable in the direction of the axis of movement between the open and closed positions, wherein the further hinged part can be mounted rotatably about the axis of rotation on the further sliding part, so that the further hinged part is slidable together with the further sliding part. Furthermore, the door leaf can be attached at its first end to the hinged part and at its second end to the further hinged part, so that the door leaf is rotatable together with the hinged part and the further hinged part. For example, in the operational state of the elevator car – viewed in the vertical direction – the first end can be an upper end of the door leaf and the second end a lower end of the door leaf. The door leaf can, for example, rigidly connect the hinged parts to one another.For this purpose, the door leaf can be designed to be torsionally rigid. As mentioned above, the hinged sections can at least partially frame the door leaf horizontally. It is also possible for at least one of the hinged sections to additionally frame the door leaf at least partially vertically. For example, the hinged sections can also surround the door leaf like a frame. Thus, the door leaf can be mounted very stably with relatively little structural effort.

[0034] In particular, the sliding element, when closed, can close at least part of the cabin opening. Specifically, the sliding element, as an upper sliding element, can close an upper edge of the door opening in the emergency opening position, and / or the other sliding element, as a lower sliding element, can close a lower edge of the door opening in the emergency opening position. The fact that both the upper and lower sliding elements remain in the emergency opening position has the advantage that the locking bolt attached to them is easily accessible and that the sliding element can be designed to be robust. According to one embodiment, the door system can further comprise at least one additional door leaf for closing another portion of the cabin opening.Accordingly, the mounting device can further be designed to allow the additional door leaf to be slidably mounted on the elevator car in the direction of the axis of movement between an open position, in which the additional door leaf opens the additional section, and a closed position, in which the additional door leaf closes the additional section, and / or to be rotatably mounted about a further axis of rotation parallel to the axis of rotation. The door leaves can, for example, be a left and a right door leaf, whereby the car opening can be closed in the operational state of the elevator car by moving the door leaves towards each other in opposite directions, or opened by moving the door leaves away from each other in opposite directions. It is also possible that both door leaves can be slid in the same direction from the same side of the car opening and / or towards the same side of the car opening.This design allows, for example, more than one door leaf to be rotated into the emergency opening position. This reduces the risk that the cabin opening cannot be opened wide enough in the event of an evacuation.

[0035] The door leaves can, for example, rotate independently of each other around their axes of rotation.

[0036] According to one embodiment, the door leaf can first be unlocked by releasing the hinged section and then rotated into the emergency opening position. The requirement that the door leaf must first be unlocked prevents it from being accidentally opened during normal operation of the elevator system.

[0037] According to one embodiment, when the door leaf is rotated into the emergency opening position, it can be swung into the elevator car. This allows the door leaf to project largely into the elevator car in the emergency opening position. This can be advantageous in narrow elevator shafts. Additionally or alternatively, the door leaf can be rotated about a vertical axis as the axis of rotation. Accordingly, the door leaf or leaves can be mounted to slide along a horizontal axis as the axis of movement.

[0038] Preferably, each individual door leaf can be rotated into the emergency opening position. In the case of telescopic sliding doors with multiple telescopically moving door leaves, preferably only the foremost door leaf can be rotated into the emergency opening position. This is entirely sufficient to evacuate the passengers from the cabin.

[0039] Advantageous embodiments of the invention are further explained below with reference to the accompanying drawings, whereby neither the drawings nor the explanations are to be interpreted as limiting the invention in any way. Fig. 1 shows an elevator system according to an embodiment of the invention from above. Fig. 2 shows an elevator cabin of the elevator system from Fig. 1 from the beginning.

[0040] The figures are merely schematic and not to scale. The same reference symbols denote identical or equivalent features in the different drawings.

[0041] Fig. 1 Figure 1 shows a top view of an elevator system 1 with an elevator shaft 2 that connects several floors of a building. An elevator car 3, which travels between the floors, is arranged in the elevator shaft 2. The elevator car 3 has a cabin opening 4 that can be closed by means of a door system 5.

[0042] In this example, the door system 5 comprises a first door leaf 6a and a second door leaf 6b, which are slidably mounted in opposite directions along a horizontal displacement axis 8 between an opening position in which the cabin opening 4 is released by both door leaves 6a, 6b, and a closed position in which the cabin opening 4 is closed by both door leaves 6a, 6b.

[0043] In addition, the first door leaf 6a is rotatably mounted about a vertical first pivot axis 9a and the second door leaf 6b about a vertical second pivot axis 9b, such that each door leaf 6a, 6b, if it is blocked in the closed position and / or in an intermediate position between the open and closed positions, for example due to a beam running in the elevator shaft 2, can be rotated in an emergency opening position in which the cabin opening 4 is released to such an extent that persons can leave the elevator cabin 3 via the cabin opening 4.

[0044] For example, the cabin opening 4 in the emergency opening position of one or both door leaves 6a, 6b can have a width of at least 20 cm, preferably at least 35 cm or at least 50 cm. The door leaf 6a, 6b can be rotated, for example, by at least 20°, preferably at least 40°, at least 60° or at least 80°, about the axis of rotation 9a or 9b.

[0045] The rotation axes 9a and 9b can intersect the translation axis 8, as shown here. Alternatively, one or both rotation axes 9a and 9b can be offset horizontally from the translation axis 8.

[0046] Each door leaf 6a, 6b can, for example, be swung at least partially into the elevator car 3 by rotating it about its axis of rotation 9a or 9b.

[0047] Fig. 1 Figure 1 shows the two door leaves 6a, 6b in the closed position, with the opening and emergency opening positions of the door leaves 6a, 6b indicated by dashed lines.

[0048] Fig. 2 Figure 1 shows a front view of the elevator car 3 with details of a storage device 10, via which the two door leaves 6a, 6b are slidably and rotatably mounted on the elevator car 3.

[0049] In this example, the storage device 10 comprises, for each door leaf 6a, 6b, an upper hinged part 11 and a lower hinged part 12, as well as an upper sliding part 13 and a lower sliding part 14. The upper sliding parts 13 can each be mounted above the cabin opening 4 and the lower sliding parts 14 can each be mounted below the cabin opening 4 along the sliding axis 8 between the opening and closing positions on the elevator car 3.

[0050] For example, the sliding parts 13, 14 can be designed as guide shoes which can be guided by corresponding guide rails on the elevator car 3.

[0051] Each upper folding part 11 is rotatably mounted on one of the upper sliding parts 13 about the pivot axis 9a or 9b and is attached to an upper end of one of the two door leaves 6a, 6b.

[0052] Similarly, each lower folding part 12 is rotatably mounted on one of the lower sliding parts 14 about the pivot axis 9a or 9b and is attached to a lower end of one of the two door leaves 6a, 6b.

[0053] The door leaves 6a, 6b are thus rotatable together with the respective folding parts 11, 12 about the respective pivot axis 9a, 9b, whereby the upper folding parts 11 together with the respective upper sliding part 13 and the lower folding parts 12 together with the respective lower sliding part 14 are movable.

[0054] The hinged parts 11, 12 can, for example, be screwed and / or welded to the respective door leaf 6a, 6b. Alternatively, the hinged parts 11, 12 can also be designed as appropriately shaped sections of the respective door leaf 6a, 6b.

[0055] The folding parts 11, 12 and / or the sliding parts 13, 14 can, for example, be designed as elongated profiles, angles or strips.

[0056] In the Fig. 2 In the example shown, the folding parts 11, 12 each extend over the entire width of the respective door leaf 6a, 6b. However, the folding parts 11, 12 can also extend only partially in the width direction and / or at least partially in the height direction of the door leaves 6a, 6b, for example to form a frame around the respective door leaf 6a, 6b.

[0057] Each folding part 11, 12 can, for example, be rotatably mounted at its first end (here adjacent to a side edge of the cabin opening 4) via a bearing bolt 15, which extends from the folding part 11, 12 into the adjacent sliding part 13 or 14, about the axis of rotation 9a or 9b.

[0058] In addition, each folding part 11, 12 can be locked at its second end, which is opposite the first end in a horizontal direction, by means of a locking bolt 16 on the respective sliding part 13 or 14.

[0059] Fig. 2 Figure 1 shows the locking bolt 16 of each door leaf 6a, 6b in the locked state, in which the locking bolt 16 engages both in the respective hinged part 11, 12 and in the respective sliding part 13, 14 and thus prevents the respective hinged part 11, 12, i.e., the respective door leaf 6a, 6b, from rotating into the emergency opening position.

[0060] For example, each locking bolt 16 can be slidably mounted vertically between an unlocking position, in which the locking bolt 16 is completely moved out of the respective hinged part 11, 12, and a locking position, in which the locking bolt 16 partially engages in the respective hinged part 11, 12.

[0061] Additionally, the locking bolt 16 can be coupled with a spring mechanism 17 which applies a restoring force to the locking bolt 16 in the direction of the locking position.

[0062] Each locking bolt 16 can optionally be connected to an elongated pulling element 18, for example a rope or wire, wherein the locking bolt 16 can be moved into the unlocking position by pulling on the pulling element 18.

[0063] As in Fig. 2As shown by way of example, the two locking bolts 16 of the same door leaf 6a and 6b can be connected to different ends of the same pull rod 18. By pulling on the pull rod 18, both locking bolts 16 can thus be moved simultaneously into the unlocked position (when the pull rod 18 is released, the locking bolts 16 move back into the locked position on their own due to the restoring force).

[0064] Alternatively, the position of the bearing bolts 15 can be reversed with the position of the locking bolts 16.

[0065] Finally, it should be noted that terms such as "comprising," "encompassing," etc., do not exclude other parts or steps, and indefinite articles 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 foregoing embodiments may also be used in combination with features or steps described with reference to other of the foregoing embodiments. Reference numerals in the claims are not to be considered as a limitation.

Claims

1. Door system (5) for a lift car (3), wherein the lift car (3) is movable in a lift shaft (2) between several floors and has at least one car opening (4), wherein the door system (5) comprises: at least one door leaf (6a, 6b) for closing at least a partial region of the car opening (4); and a mounting device (10) which is designed to mount the door leaf (6a, 6b) on the lift car (3) slidably in the direction of a sliding axis (8) between an open position, in which the door leaf (6a, 6b) releases the partial region, and a closed position, in which the door leaf (6a, 6b) closes the partial region, and additionally rotatably about a rotation axis (9a, 9b) so that the door leaf (6a, 6b), when it is slid into the closed position and / or into an intermediate position between the open position and the closed position, can be rotated into an emergency open position in which the car opening (4) is released to such an extent that the lift car (3) can be evacuated via the car opening (4), characterized in that, the mounting device (10) comprises at least one folding part (11, 12) and at least one sliding part (13, 14); characterized in that, the sliding part (13, 14) is slidably mountable on the lift car (3) in the direction of the sliding axis (8) between the open position and the closed position, wherein the folding part (11, 12) is mountable on the sliding part (13, 14) rotatably about the rotation axis (9a, 9b) so that the folding part (11, 12) is slidable together with the sliding part (13, 14), and wherein the door leaf (6a, 6b) is fastenable to the folding part (11, 12) so that the door leaf (6a, 6b) is rotatable together with the folding part (11, 12).

2. Door system (5) according to claim 1, wherein the folding part (11, 12) is elongate and is rotatably connectable to the sliding part (13, 14) at its first end.

3. Door system (5) according to claim 1 or 2, wherein the folding part (11, 12) is rotatably connectable to the sliding part (13, 14) via a mounting bolt (15), which engages partially in the folding part (11, 12) and partially in the sliding part (13, 14).

4. Door system (5) according to any one of claims 1 to 3, wherein the folding part (11, 12) is lockable to the sliding part (13, 14), wherein rotation of the folding part (11, 12) about the rotation axis (9a, 9b) is prevented in the locked state of the folding part (11, 12) and is made possible in the unlocked state of the folding part (11, 12).

5. Door system (5) according to claim 4, wherein the folding part (11, 12) is lockable to the sliding part (13, 14) via at least one locking bolt (16), wherein the locking bolt (16) in the locked state engages partially in the folding part (11, 12) and partially in the sliding part (13, 14) and in the unlocked state does not engage in the folding part (11, 12) and / or does not engage in the sliding part (13, 14).

6. Door system (5) according to claim 5, as dependent on claim 2, wherein the locking bolt (16) engages in a second end of the folding part (11, 12) in the locked state.

7. Door system (5) according to claim 5 or 6, wherein the locking bolt (16) is displaceable between an unlocking position associated with the unlocked state and a locking position associated with the locked state; wherein the locking bolt (16) is couplable to a spring mechanism (17), which is designed to apply a restoring force, acting in the direction of the locking position, to the locking bolt (16) coupled to the spring mechanism (17).

8. Door system (5) according to claim 7, wherein the locking bolt (16) is connectable to an elongate traction means (18) and is displaceable from the locking position into the unlocking position by pulling on the traction means (18) connected to the locking bolt (16).

9. Door system (5) according to any one of claims 1 to 8, wherein the mounting device (10) furthermore comprises a further folding part (12) and a further sliding part (14); wherein the further sliding part (14) is slidably mountable on the lift car (3) in the direction of the sliding axis (8) between the open position and the closed position, wherein the further folding part (12) is mountable on the further sliding part (14) rotatably about the rotation axis (9a, 9b) so that the further folding part (12) is slidable together with the further sliding part (14), and wherein the door leaf (6a, 6b) is fastenable at its first end to the folding part (11) and at its second end to the further folding part (12) so that the door leaf (6a, 6b) is rotatable together with the folding part (11) and the further folding part (12).

10. Door system (5) according to any one of the preceding claims, furthermore comprising: at least one further door leaf (6b) for closing a further partial region of the car opening (4); wherein the mounting device (10) is furthermore designed to mount the further door leaf (6b) on the lift car (3) slidably in the direction of the sliding axis (8) between an open position, in which the further door leaf (6b) releases the further partial region, and a closed position, in which the further door leaf (6b) closes the further partial region, and / or rotatably about a further rotation axis (9b) parallel to the rotation axis (9a).

11. Lift system (1), comprising: a lift shaft (2); and at least one lift car (3), which is movable in the lift shaft (2) between several floors and has at least one car opening (4); wherein the lift car (3) comprises at least one door system (5) according to any one of the preceding claims, wherein the door leaf (6a, 6b) is mounted via the mounting device (10) on the lift car (3) slidably in the direction of the sliding axis (8) between the open position and the closed position and additionally rotatably about the rotation axis (9a, 9b).

12. Method for evacuating a lift car (3) of a lift system (1) according to claim 11, wherein the method comprises: if the lift car (3) is to be evacuated via the car opening (4) and the door leaf (6a, 6b) is slid into the closed position and / or an intermediate position between the open position and the closed position: rotating the door leaf (6a, 6b) about its rotation axis (9a, 9b) into an emergency open position in which the car opening (4) is released to such an extent that the lift car (3) can be evacuated via the car opening (4).

13. Method according to claim 12, wherein the lift car (3) comprises the door system (5) according to claim 5; wherein the door leaf (6a, 6b) is first unlocked by unlocking the folding part (11, 12) and then rotated into the emergency open position.

14. Method according to claim 12 or 13, wherein the door leaf (6a, 6b) is pivoted into the lift car (3) when rotated into the emergency open position; and / or wherein the door leaf (6a, 6b) is rotated about a vertical axis as the rotation axis (9a, 9b).