WO2018192812A1

WO2018192812A1 - Warning device for an elevator

Info

Publication number: WO2018192812A1
Application number: PCT/EP2018/059239
Authority: WO
Inventors: Youlian DAVIDOV
Original assignee: Inventio Ag
Priority date: 2017-04-19
Filing date: 2018-04-11
Publication date: 2018-10-25

Abstract

A warning device (25) for an elevator is proposed. The warning device (25) is configured to, in a first configuration, generating a warning signal upon an elevator shaft door (15) being opened beyond a predefined degree. Furthermore, the warning device (25) is configured to, in a second configuration, suppress generating the warning signal upon the elevator shaft door (15) being opened in case an elevator cabin (5) is arranged adjacent to the elevator shaft door (15). For example, an actuator lever (35) of an actuation mechanism (29) may be retracted upon interaction with a door clutch actuator (23) in order to prevent a tip (57) of the actuator lever (35) from actuating a clapper (37) of a bell (41). Accordingly, a warning signal generation is suppressed during normal operation of the shaft door (15) in order to e.g. not to annoy passengers, but a warning signal is generated for example when a technician opens the shaft door (15) with a C-key and the elevator cabin (5) is not adjacent to the shaft door (15).

Description

Warning device for an elevator

The present invention relates to a warning device to be applied in an elevator.

Elevators typically comprise one or more cabins, sometimes also referred to as cars, which may be accessed by passengers or goods and which may be displaced between various levels or floors within a building such as to transport the passengers or goods to destination locations. The elevator cabin may travel along a travel path. For example, the cabin may be displaced within an elevator shaft, sometimes also referred to as hoistway.

In order to prevent people from accessing the travel path of the elevator as long as no cabin is present at their current location, i.e. in order to prevent that a person may access for example the elevator shaft while no elevator cabin is waiting at his current floor, this travel path or elevator shaft is typically blocked by shaft doors, sometimes also referred to as landing doors. These shaft doors are normally closed and, in normal elevator operation, should be opened only when the elevator cabin is waiting at a respective floor, i.e. the cabin is positioned adjacent to the shaft door. In all other cases, the shaft doors may be locked using for example a door lock.

However, in specific situations such as for example for maintenance reasons or in emergency situations, it may be necessary that a shaft door can be opened by an authorized person, such as maintenance staff, although no elevator cabin is waiting adjacent to the shaft door. For such purpose, the authorized person may have a special key or tool, such as a C-key, with which the door lock may be unlocked and the shaft door may be opened, thereby enabling access to the elevator travel path.

Generally, authorized persons are aware of the fact that, when opening the shaft door with their key or tool, there are no further safety measures which prevent them from accessing the elevator travel path. Particularly, there is a lethal risk of falling for example into the elevator shaft or being seriously injured by a moving elevator cabin. Accordingly, the authorized persons will generally open the shaft door with increased attention. Various approaches have been developed in order to further increase the safety of the elevator. For example, specific door locks have been developed in order to avoid that any unauthorized person may open a shaft door or in order to avoid that an authorized person unintentionally opens a shaft door. Such approaches are described for example in CN 104418218 A, CN 201864426 U and CN 203545418 U.

However, cases have been observed where, despite any shaft door locks or other safety measures for avoiding unintended opening of shaft doors, for example an authorized person accessed an elevator travel path without sufficient care and got seriously injured or even died.

Accordingly, there may be a need for further increasing an elevator safety. Particularly, there may be a need for avoiding that any elevator shaft doors are opened unintendedly and/or without sufficient care being taken.

Such needs may be met by the subject-matter of the independent claims. Beneficial embodiments are defined in the dependent claims as well as in the following

specification.

According to a first aspect, a warning device for an elevator is proposed. This warning device is configured to, in a first configuration, generating a warning signal upon an elevator shaft door being opened beyond a predefined degree, and the warning device is configured to, in a second configuration, suppress generating the warning signal upon the elevator shaft door being opened in case an elevator cabin is arranged adjacent to the elevator shaft door.

According to a second aspect, an elevator comprising such warning device according to an embodiment of the first aspect of the invention is proposed.

Ideas underlying embodiments of the present invention may be interpreted as being based, inter alia and without restricting the scope of the invention, on the following observations and recognitions. As indicated further above, despite sophisticated shaft door lock mechanisms preventing unauthorized or unintended opening of a shaft door, accidents have been observed in which a person had opened an elevator shaft door and then for example fell into the elevator shaft or was hit by a moving elevator cabin.

Particularly with specially trained authorized persons, it is assumed that such accidents mainly occur when the person's attention is temporarily distracted for whatever reason and the authorized person intentionally opens the shaft door with his key or tool in a customary manner but, due to a distraction, does not check whether or not the elevator cabin is present or approaching when entering the elevator travel path.

It is therefore proposed to provide a specific warning device for an elevator which may warn a person upon opening an elevator shaft door. Such warning device shall be configured for generating a warning signal upon the elevator shaft door being opened beyond a predefined degree.

The warning signal may be any signal which may be recognized by a person. Preferably, the warning signal may be an audible signal such that a person may hear the warning signal even in cases of temporary distraction. For example, the warning signal may be an audible signal such as a ring, a beep, a whistling, etc. In principle, the warning signal may also be any other type of human-recognizable signal such as a visual signal, a combined audible-visual signal, etc.

The warning device is adapted to issue the warning signal as soon as the elevator shaft door is opened beyond the predefined degree, i.e. beyond for example a predefined opening status in which an opening gap is larger than for example 5 inches.

Generally, while only for example unlocking a shaft door and/or only slightly opening a shaft door by for example a few inches does not necessarily immediately result in any increased danger, opening the shaft door beyond a specific degree such that a person may for example grab or walk through the generated gap may potentially be very dangerous. For example, it has been found that any gap being larger than 5 or 6 inches may result in increased danger. Therein, depending on the type of the elevator shaft door, the opening gap may occur in different manners. For example, in a shaft door having two wings to be moved in opposite directions, such shaft door type being sometimes referred to as C2, C4 or, more generally, Cx door type, the opening gap may be generated between these door wings. In a shaft door having only one wing to be opened by moving it in directions relative to a door frame, such door type being sometimes referred to as T2 or, more generally, Tx doors, the opening gap may occur between the door wing and the door frame.

However, it is assumed that generating a warning signal each and every time the elevator shaft door is opened beyond the predefined degree may result in a certain customization or habitude, particularly with professional personnel which works with elevators every day. Furthermore, when a warning signal is issued every time the shaft door is opened, this may be annoying e.g. for passengers of the elevator.

It is therefore proposed to specifically adapt the warning device such that there are two configurations and the warning signal is only generated when the warning device is in its first configuration whereas the warning device is specifically configured to suppress generating the warning signal, which would otherwise be generated upon the elevator shaft door being opened beyond the predefined degree, in the warning device's second configuration. Such second configuration shall be established only in case an elevator cabin is arranged adjacent to the elevator shaft door being currently opened.

In other words, while the warning device should generally be activated, i.e. be in its first configuration, and should therefore generate the warning signal as soon as the elevator shaft door is significantly opened, such activation of the warning signal should be temporarily suppressed as long as an elevator cabin is arranged next to the associated elevator shaft door. Accordingly, no warning signal is generated by the warning device in cases of lacking actual danger, i.e., when the elevator cabin is waiting right next to the opened elevator shaft door.

Thereby, any customization or habitude to repeatedly occurring warning signals in non- dangerous situations may be avoided. Furthermore, it may be avoided that the warning device also issues warning signals during normal operation, for example each time the shaft door is opened for enabling access of a passenger for entering or leaving the elevator cabin correctly waiting next to the shaft door, as such useless warning signals could irritate or annoy passengers.

According to an embodiment, the warning device comprises a sound generator for generating a sound upon mechanical actuation thereof. Therein, the warning device comprises an actuator mechanism for mechanically actuating the sound generator upon the elevator shaft door being opened.

In other words, the warning signal may be an audible signal to be generated by the sound generator. Therein, it may be beneficial to apply a sound generator which may be actuated mechanically.

For example, the sound generator may be a bell, similar to a bike bell, or a chime. Such bell or chime may be mechanically actuated for example by hitting it with an actuator such as a clapper or lever. Alternatively, the sound generator may be any other type of sound emitting means to be actuated mechanically, such as for example a whistle, pipe, gong, etc.

The feature that the sound generator is to be actuated mechanically may result in a very high reliability of the sound generation. Particularly, no external energy source such as a battery may be necessary and/or no electrical or electronical means for sound generation are required. Thereby, possible sources of failures or malfunctions may be minimized, thereby increasing the reliability of the warning signal generation by the warning device.

Furthermore, a sound generator to be actuated mechanically using an actuator mechanism may be simple to install and/or maintain within an elevator, as for example no additional wiring or energy sources are required.

According to a specific embodiment, the actuator mechanism of the sound generator may be configured for mechanically preventing actuating the sound generator upon the elevator shaft door being opened in case an elevator cabin is arranged adjacent to the elevator shaft door. In other words, not only the sound generation is mechanically actuated but also the fact that such sound generation is prevented or suppressed in specific non-dangerous situations, i.e. when the elevator cabin is waiting next to the shaft door, may be established by mechanical means. Thereby, reliability of the suppression of sound generation in needless situations may be reliable and/or easy to implement.

According to an embodiment, the actuator mechanism comprises an actuator lever which, in the first configuration, is configured for actuating the sound generator upon the elevator shaft door being opened beyond the predefined degree, and wherein, in the second configuration, the actuator mechanism is configured for mechanically displacing the actuator lever such that actuating the sound generator upon the elevator shaft door being opened is prevented in case the elevator cabin is arranged adjacent to the elevator shaft door.

In other words, the actuator mechanism of the sound generator may comprise an actuator lever with which the sound generator is actuated when the elevator shaft door is being opened beyond the predefined degree and the warning device is in its first configuration. For example, such actuator lever may be a lever which hits a bell or chime for actuating the sound generation. The actuator mechanism is then specifically configured to displace this actuator lever, i.e. to move the actuator lever to another location or into another orientation, when the warning device is brought into its second configuration. That means that, in the second configuration, the actuator lever is displaced such that it may no more actuate the sound generator and therefore sound generation is prevented in case the elevator cabin is waiting at a position adjacent to the elevator shaft door.

In a specific embodiment, in the first configuration, the actuator lever is extended closer to the sound generator than in the second configuration.

In other words, the actuator mechanism of the sound generator may be configured such that its actuator lever is normally, i.e. in the first configuration, arranged sufficiently close to the sound generator such that the lever activates sound generation upon the shaft door being significantly opened. However, when brought to the second configuration due to the elevator cabin being adjacent to the shaft door, the actuator mechanism displaces the actuator lever further away from the sound generator such that it may no more mechanically actuate any sound generation.

Particularly, according to an embodiment, the elevator shaft door may be movable relative to a shaft door frame, and the sound generator may be fixed either to the elevator shaft door or to the shaft door frame whereas the actuator mechanism is fixed to the respective other component, i.e. to the shaft door frame or the elevator shaft door.

Thus, with the sound generator being fixed to one component and the actuator mechanism being fixed to the other component, upon both components moving relative to each other, i.e. upon the elevator shaft door being moved relative to the shaft door frame, actuation of the sound generator by the actuator mechanism moving relative thereto may be established easily. For example, a bell serving as sound generator may be fixed to the shaft door frame whereas a lever is fixed to the elevator shaft door. In the first configuration, the lever is arranged at such position and close enough to the bell that, upon the shaft door being opened, the lever mechanically actuates the bell, thereby generating the warning signal. In the second configuration, the lever is displaced to a position where it is further away from the bell such that, when the lever being moved together with the shaft door, it no more hits the bell and therefore warning signal generation is prevented. In other words, in the first configuration, a travel path of the lever overlaps with the position of the bell whereas in the second configuration, no such overlap exists. According to an embodiment, the warning device is configured to be normally in the first configuration and to be brought to the second configuration only when the elevator cabin is arranged adjacent to the elevator shaft door and interacts with the elevator shaft door. In other words, the warning device may be configured such that, under normal conditions and as long as for example no external influences such as external forces onto components of the warning device are effected, the warning device is and remains in its first configuration. Furthermore, the warning device may be configured such that a transition to the second configuration is only effected upon the elevator cabin being arranged next to the elevator shaft door and interacts with the shaft door.

Therein, an interaction between the elevator cabin and the elevator shaft door may be understood as any effect the presence of the elevator cabin adjacent to the elevator shaft door induces to the elevator shaft door. Particularly, such interaction may result in changes in the structural and/or functional configuration of the elevator shaft door.

As an example, the elevator cabin, when being arranged adjacent to an elevator shaft door, may interact with the elevator shaft door such that for example a door lock of the elevator shaft door is temporarily unlocked. Alternatively or additionally, the elevator cabin may interact with the elevator shaft door such that a cabin door cooperates with the shaft door.

According to an embodiment, the warning device may be configured to be brought to the second configuration when the elevator cabin is arranged adjacent to the elevator shaft door and a door clutch actuator provided at the elevator cabin interacts with a door clutch counterpart provided at the shaft door.

In other words, a door clutch may be provided. Such door clutch may couple the cabin door with a shaft door during the elevator cabin waiting adjacent to the elevator shaft door. Due to such mechanical coupling, the cabin door may be displaced together with the shaft door. Typically, the cabin door is actively driven for example by a motor whereas the shaft doors are passive and may be opened and closed only upon being coupled to an active cabin door. Therein, the door clutch comprises a door clutch actuator typically provided at the elevator cabin and a door clutch counterpart typically provided at the shaft door. When the elevator cabin is stopped in front of a shaft door, the door clutch actuator interacts with the door clutch counterpart such as to for example unlock the door lock of the shaft door and mechanically couple both doors for common motions to be driven by the cabin door. The warning device may then be configured to be brought to its second configuration only when the door clutch actuator interacts with the door clutch counterpart. Particularly, according to an embodiment, the warning device may be configured to, upon the door clutch actuator interacting with the door clutch counterpart, being simultaneously brought to the second configuration via interaction with the door clutch actuator.

In other words, the door clutch actuator of the cabin door may not only interact with the door clutch counterpart of the shaft door but may also simultaneously interact with the warning device such as to bring it into its second configuration. Particularly, the door clutch actuator may interact with the actuator mechanism such as to bring it into a state in which it may no more actuate the sound generator. As a result, as long as the door clutch couples the cabin door with the shaft door, any warning signal generation by the warning device is temporarily suppressed.

According to a specific embodiment, the warning device comprises an actuator mechanism for mechanically actuating the sound generator upon the elevator shaft door being opened, wherein the actuator mechanism comprises an actuator lever which, upon the door clutch actuator interacting with the door clutch counterpart, is simultaneously pivoted via interaction with the door clutch actuator, thereby obtaining the second configuration.

In other words, the door clutch and the actuator mechanism of the warning device may be configured such that, when the door clutch couples the cabin door with the shaft door, it simultaneously interacts with the actuator mechanism in such a way that the actuator lever is pivoted. Due to such pivoting displacement of the actuator lever, this actuator lever may be brought into an orientation such that it may no more actuate the sound generator of the warning device. Accordingly, any warning signal generation is temporarily suppressed. It shall be noted that possible features and advantages of embodiments of the invention are described herein partly with respect to a warning device and its function and partly with respect to an elevator comprising such warning device. One skilled in the art will recognize that the features may be suitably transferred from one embodiment to another and features may be modified, adapted, combined and/or replaced, etc. in order to come to further embodiments of the invention.

In the following, advantageous embodiments of the invention will be described with reference to the enclosed drawings. However, neither the drawings nor the description shall be interpreted as limiting the invention.

Fig. 1 shows an elevator according to an embodiment of the present invention.

Fig. 2 shows a warning device according to an embodiment of the present invention in a first configuration.

Fig. 3 shows the warning device of Fig. 2 upon interaction with a door clutch in the first configuration.

Fig. 4 shows the warning device of Fig. 2 upon interaction with a door clutch in the second configuration.

The figures are only schematic and not to scale. Same reference signs refer to same or similar features.

Fig. 1 shows an elevator 1 according to an embodiment of the present invention. The elevator 1 comprises an elevator cabin 5 and a counterweight 7 which are both suspended by a suspension traction member (STM) 9. The STM 9 may be displaced using a drive unit 11 in order to thereby effectuate displacing the elevator cabin 5 and counterweight 7 within an elevator shaft 3 in a vertical direction. An operation of the drive unit 11 is controlled by an elevator controller 13. The elevator 1 furthermore comprises shaft doors 15 at each of multiple floors 17 of a building, such shaft doors 15 opening and closing an access from a floor 17 to the elevator shaft 3. Each of the shaft doors 15 is provided with a door clutch counterpart 19 cooperating with a door lock. Furthermore, the elevator cabin 5 comprises a cabin door 21 opening and closing an access to the elevator cabin 5. The cabin door 21 is provided with a door clutch actuator 23.

Furthermore, the elevator 1 comprises a plurality of warning devices 25. Therein, one warning device 25 is associated to each of the shaft doors 15.

Each of the warning devices 25 is configured to, in a first configuration, generate a warning signal upon the associated shaft door 15 being opened beyond a predetermined degree and to, in a second configuration, suppress the generation of the warning signal upon the associated shaft door 15 being opened in case the elevator cabin 5 is arranged adjacent to the respective shaft door 15.

Figs. 2 to 4 show an example of the warning device 25 in the first and second configurations, respectively. Therein, the warning device 15 comprises a sound generator 27 and an actuator mechanism 29. The sound generator 27 is located at a stationary door frame 31 of the shaft door 15, whereas the actuator mechanism 29 is located at the shaft door 15 itself, or more precisely at a door wing 33 which is displaceable with respect to the door frame 31.

In the example shown, the actuator mechanism 29 comprises an actuator lever 35 extending towards the sound generator 27. Therein, a longer arm 36 of the actuator lever 35 protrudes beyond a surface of the door wing 33. Upon moving the door wing 33 in an opening direction 39 relative to the door frame 31, the actuator lever 35 may interact with a clapper 37 of the sound generator 27, thereby actuating the sound generator 27 for generating the warning signal.

Described in more detail, the warning device 25 includes a mechanical ringing bell 41 with the clapper 37, together forming a specific example of a sound generator 27. Such ringing bell 41 may be similar to a bicycle bell and may produce a ringing sound upon displacing and suddenly releasing the clapper 37. The actuator mechanism 29 comprises a base plate 43 attached to the wing 33 of the shaft door 15. The base plate 43 features a pin where the actuator lever 35 is connected to it in a way such that this actuator lever 35 may pivot freely. The actuator lever 35 further comprises a shorter arm 45. The shorter arm 45 and the longer arm 36 are preferably acute-angled. A lever roller 47 is attached to this shorter arm 45 and may rotate freely. A compression spring 49 extends between a base plate tap 51 and a tap 53 provided on the longer arm 36 of the actuator lever 35. This spring 49 keeps the actuator lever 35 normally in an upright position. Particularly, the spring 49 pushes the longer arm 36 of the actuator lever 35 against a counterpiece 55 on the base plate 43.

The bell 41 with its clapper 37 is installed in a way such that in door closed position, a lateral distance between a tip 57 of the longer arm 36 of the actuator lever 35, when in upright position, and the clapper 37 is for example 5.5 inches for a T2 elevator shaft door or 2.75 inches for a C2 elevator shaft door. An outer surface of the roller 47 attached to the shorter arm 45 of the actuator lever 35 may be aligned to an outer surface of a landing door opening roller 59.

A function and operation of the warning device 25 may be as follows:

When the elevator car 5 is out of a door unlocking zone, i.e. substantially far away from a direct neighbourhood to one of the shaft doors 15, a door clutch comprising the door clutch actuator 23 and the door clutch counterpart 19 is in a released configuration. In such released configuration, the door clutch actuator 23 does not engage with the landing door opening roller 59.

In such situation, the warning device 25 is in its first configuration, as shown in Fig. 2. Therein, the longer arm 36 of the actuator lever 35 is in its upright position, pressed by the spring 49 to the counterpiece 55. In this first configuration, the tip 57 of the longer arm 36 of the actuator lever 35 overlaps with the clapper 37 in a side view projection. Accordingly, when starting opening the door wing 33 and thereby moving the door wing 33 in the opening direction 39 relative to the bell 41 and its clapper 37, after 5.5 inches (for a T2 elevator door) or 2.75 inches (for a C2 elevator door), the tip 57 will touch the clapper 37 and, upon going further, will initiate a bell ringing. However, such bell ringing representing a warning signal is only initiated as long as the warning device 25 is in its first configuration as shown in Fig. 2. In other words, the actuator lever 35 rings the bell 41 only as long as it is in its upright position.

Figs. 3 and 4 show a first state and a second state in which a door clutch actuator 23 interacts with the actuator mechanism 29, thereby bringing the warning device 25 from its first configuration, as shown in Fig. 3, into its second configuration to its second configuration, as shown in Fig. 4,. In such second configuration, the tip 57 of the longer arm 36 of the actuator lever 35 may no more reach the clapper 37 of the ringing bell 41, such that no warning signal is generated upon opening the elevator door wing 33.

With respect to Figs. 3 and 4, this shall be explained for the example of an elevator with moving landing door rollers 59.

In normal operation of such elevator, two portions of the door clutch actuator 23, i.e. two clutch plates 24, are arranged closely to each other as long as the elevator car 5 is out of the door unlocking zone. Upon reaching a floor 17 and opening the elevator cabin door 21, these two clutch plates 24 of the door clutch actuator 23 are spread, i.e. a distance between both clutch plates 24 is increased, in order to thereby move the landing door opening roller 59 into a configuration in which the door clutch counterpart 19 interacts with the door clutch actuator 23 such as to mechanically couple the cabin door 21 with the shaft door 15.

Since both, the landing door opening roller 59 as well as the lever roller 47 attached to the shorter arm 45 of the actuator lever 35 are aligned with each other, the door clutch actuator 23 also moves the lever roller 47 of the actuator lever 35. Thereby, the actuator lever 35 is pivoted around its pivoting axis 61. Due to such pivoting action, the tip 57 of the longer arm 36 of the actuator lever 35 is moved closer towards the wing 33 of the shaft door 15, i.e. in a direction away from the clapper 37 of the bell 41. Accordingly, in a projection direction corresponding to the opening direction 39, the motion path of the tip 57 of the actuator lever 35 does no more overlap with the extension of the clapper 37 or the bell 41. Accordingly, upon moving the door wing 33 in the opening direction 39, the tip 57 is not going to engage with the clapper 37 of the bell 41, but will pass under it without moving the clapper 37. Accordingly, no bell ringing will be initiated in such second configuration of the warning device 25.

Since the clutch mechanism is generally relaxed also during a door closing stage, the tip 57 of the longer arm 36 of the actuator lever 35 is still in such retracted configuration and will not produce any bell ringing while the door wing 33 is closing.

Another possible option (not explicitly shown in the figures) is to connect the shorter arm 45 of the actuator lever 35 directly to the landing door opening roller 59.

In a further example (not explicitly shown in the figures) of an elevator with firmly attached, i.e. not moving, landing door opening rollers 59, the lever roller 47 of the actuator lever 35 may be horizontally offset towards door clutch actuator 23 at a certain distance of for example 5 mm, compared to the landing door opening roller 59. In this way, the door clutch actuator 23 will touch first the device roller 47 and will rotate the actuator lever 35 until reaching the firmly attached landing door opening roller 59. Except for this feature, the warning device 25 may operate as described above with respect to the figures 2 to 4.

As described herein, the warning device 25 may generate the warning signal when being in its first configuration, but will suppress generation of such warning signal when brought to its second configuration. Accordingly, as long as the elevator cabin 5 is arranged adjacent to the shaft door 15 and the door clutch actuator 23 interacts with the door clutch counterpart 19, no potentially annoying sound generation is induced upon opening the elevator cabin door 21. However, if the elevator cabin 5 is not arranged adjacent to the elevator shaft door 15 but the elevator shaft door 15 is nevertheless opened for example by an authorized person using for example a C-key, the warning device 25 will be in its first configuration and will generate the warning signal as soon as the elevator shaft door 21 is opened beyond the predefined degree. Finally, it should be noted that the term "comprising" does not exclude other elements or steps and the "a" or "an" does not exclude a plurality. Also elements described in association with different embodiments may be combined. It should also be noted that reference signs in the claims should not be construed as limiting the scope of the claims.

Claims

Claims:

1. Warning device (25) for an elevator (1), wherein the warning device (25) is configured to, in a first configuration, generating a warning signal upon an elevator shaft door (15) being opened beyond a predefined degree and wherein the warning device (25) is configured to, in a second configuration, suppress generating the warning signal upon the elevator shaft door (15) being opened in case an elevator cabin (5) is arranged adjacent to the elevator shaft door (15), wherein the warning device (25) is configured to be brought to the second configuration when the elevator cabin (5) is arranged adjacent to the elevator shaft door (15) and a door clutch actuator (23) provided at the elevator cabin (5) interacts with a door clutch counterpart (19) provided at the shaft door (15).

2. Warning device of claim 1, wherein the warning device (25) comprises a sound generator (27) for generating a sound upon mechanical actuation thereof and wherein the warning device (25) comprises an actuator mechanism (29) for mechanically actuating the sound generator (27) upon the elevator shaft door (15) being opened.

3. Warning device of claim 2, wherein the actuator mechanism (29) is configured for mechanically preventing actuating the sound generator (27) upon the elevator shaft door (15) being opened in case an elevator cabin (5) is arranged adjacent to the elevator shaft door (15).

4. Warning device of one of claims 2 and 3, wherein the actuator mechanism (29) comprises an actuator lever (35) which, in the first configuration, is configured for actuating the sound generator (27) upon the elevator shaft door (15) being opened beyond the predefined degree, and wherein, in the second configuration, the actuator mechanism (29) is configured for mechanically displacing the actuator lever (35) such that actuating the sound generator (27) upon the elevator shaft door (15) being opened is prevented in case the elevator cabin (5) is arranged adjacent to the elevator shaft door (15).

5. Warning device of claim 4, wherein, in the first configuration, the actuator lever (35) is extended closer to the sound generator (27) than in the second configuration.

6. Warning device of one of claims 2 to 5, wherein the elevator shaft door (15) is movable relative to a shaft door frame (31), and wherein the sound generator (27) is fixed to one of the elevator shaft door (15) and the shaft door frame (31) and the actuator mechanism (29) is fixed to the other one of the elevator shaft door (15) and the shaft door frame (31).

7. Warning device of one of the preceding claims, wherein the warning device (25) is configured to be normally in the first configuration and to be brought to the second configuration only when the elevator cabin (5) is arranged adjacent to the elevator shaft door (15) and interacts with the elevator shaft door (15).

8. Warning device of one of the preceding claims, wherein the warning device (25) is configured to, upon the door clutch actuator (23) interacting with the door clutch counterpart (19), being simultaneously brought to the second configuration via interaction with the door clutch actuator (23).

9. Warning device of claim 8, wherein the warning device (25) comprises an actuator mechanism (29) for mechanically actuating the sound generator (27) upon the elevator shaft door (15) being opened, wherein the actuator mechanism (29) comprises an actuator lever (35) which, upon the door clutch actuator (23) interacting with the door clutch counterpart (19), is simultaneously pivoted via interaction with the door clutch actuator (23), thereby obtaining the second configuration.

10. Warning device of one of the preceding claims, wherein the warning device (25) is configured to, in the first configuration, generating the warning signal upon an elevator shaft door (15) being opened beyond a degree in which an opening gap is larger than 5 inches.

11. Elevator (1) comprising a warning device (25) according to one of the preceding claims.