(19)
(11) EP 3 712 530 A1

(12) EUROPEAN PATENT APPLICATION

(43) Date of publication:
23.09.2020 Bulletin 2020/39

(21) Application number: 20163503.4

(22) Date of filing: 17.03.2020
(51) International Patent Classification (IPC): 
F24F 11/34(2018.01)
F24F 13/14(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 22.03.2019 BE 201905178

(71) Applicant: Rf-Technologies nv
9860 Oosterzele (BE)

(72) Inventors:
  • VANDENHEEDE, Pascal
    9860 OOSTERZELE (BE)
  • D'HAESE, Jonas
    9340 OORDEGEM (BE)
  • STEENLAND, Matthieu
    1703 SCHEPDAAL (BE)

(74) Representative: Hostens, Veerle et al
KOB NV Patents President Kennedypark 31 C
8500 Kortrijk
8500 Kortrijk (BE)

   


(54) SMOKE EVACUATION SHUTTER AND DISCHARGE SYSTEM COMPRISING SUCH A SMOKE EVACUATION SHUTTER


(57) The present invention relates to a smoke evacuation shutter (1), comprising:
- a frame (2) for installing the smoke evacuation shutter (1) in a smoke evacuation duct;
- at least one door leaf (3) which is arranged in the frame (2) so as to be rotatable about a hinge pin (A) between a closed position and an open position;
- a reversible motor (4) which is configured to drive a motor shaft (5);
- transmission means (7) for transmitting the driving movement of the motor shaft (5) to the rotating movement of the door leaf (3); and
- uncoupling means (9) for manually uncoupling the motor shaft (5) from the transmission means (7).
In addition, the present invention relates to a discharge system comprising such a smoke evacuation shutter (1).




Description


[0001] The present invention relates to a smoke evacuation shutter, comprising:
  • a frame for installing the smoke evacuation shutter in a smoke evacuation duct;
  • at least one door leaf which is arranged in the frame so as to be rotatable about a hinge pin between a closed position and an open position;
  • a motor which is configured to drive a motor shaft of this motor;
  • transmission means for transmitting the driving movement of the motor shaft to the rotating movement of the door leaf; and
  • uncoupling means for uncoupling the motor shaft from the transmission means.


[0002] Such smoke evacuation shutters are normally used in discharge systems for discharging flue gases and heat. Such discharge systems are mainly intended for mechanical smoke discharge from buildings in order to facilitate the evacuation of people.

[0003] A smoke evacuation shutter of this type is normally closed. When the door leaf is in the closed position, this smoke evacuation shutter is normally fire-resistant. The smoke evacuation shutter can be opened in case of fire in order to make a controlled discharge of flue gases possible. The shutter then opens into the smoke evacuation duct. In case of fire, a control system only opens those shutters which are necessary in order to provide a smoke discharge. The other smoke evacuation shutters which cannot contribute to the desired smoke discharge, remain closed and in this case have to be resistant to fire.

[0004] Following a test or maintenance, the door leaf can be returned from the open position to the closed position by hand or by means of the motor.

[0005] In order to move the door leaf from the closed position to the open position, a spring mechanism may be provided. This is the case, for example, with the smoke evacuation shutters as described in EP 2 320 153 B1 or as marketed by the Applicant under the name Avantage.

[0006] A drawback of such embodiments is the fact that the door leaf can only be brought into a stable state in the open position and the closed position. It is not possible to bring the door leaf in a position between these extreme positions in order thus, for example, to limit the discharge rate.

[0007] There are also embodiments, such as for example described in FR 2 778 854 A1, in which the door leaf can be both opened and closed and can also be brought into positions between the open position and the closed position by means of other types of motors. However, these motors take up a considerable amount of space and either form a significant obstruction in the discharge duct or are difficult to incorporate in an aesthetic manner. The door leaf itself is not easily operable by hand either.

[0008] Priorit AG markets a smoke evacuation shutter which uses a chain motor in order to open and close the door leaf. In this smoke evacuation shutter, the door leaf cannot be opened completely, so that this door leaf itself forms a significant obstruction in the discharge duct.

[0009] In addition, there is a tendency to design smoke evacuation shutters such that they are more aesthetically pleasing, i.e. without grids, in which case the visible outer surface of the smoke evacuation shutter consists of a panel which can be made to blend with the adjoining walls in a decorative manner. Such smoke evacuation shutters are, for example, commercially available from the Applicant under the name Kamouflage and are described in EP 2 450 642 B1, EP 2 537 562 B1 and EP 2 537 563 B1. However, the current motorized systems are not incorporable in such aesthetic embodiments without forming an undesired obstruction in the smoke evacuation duct.

[0010] It is the object of the present invention to provide an alternative smoke evacuation shutter in which the opposing wishes regarding the existing smoke evacuation shutters can nevertheless be accommodated in one smoke evacuation shutter.

[0011] This object is achieved by providing a smoke evacuation shutter, comprising:
  • a frame for installing the smoke evacuation shutter in a smoke evacuation duct;
  • at least one door leaf which is arranged in the frame so as to be rotatable about a hinge pin between a closed position and an open position;
  • a reversible motor which is configured to drive a motor shaft of this motor;
  • transmission means for transmitting the driving movement of the motor shaft to the rotating movement of the door leaf; and
  • uncoupling means which comprise an operating element for manually uncoupling the motor shaft from the transmission means.


[0012] Such a motor which is configured to drive a motor shaft can be incorporated more easily in a smoke evacuation shutter without this motor itself and/or connecting means between the door leaf and the frame which are driven by this motor forming a significant obstruction in the smoke evacuation duct.
Known uncoupling means which are used in existing smoke evacuation shutters with a motor which is configured to drive a motor shaft, are automatic uncoupling means which are not suitable for use in combination with a reversible motor or which are not commercially viable as a solution.
By ensuring that the uncoupling means comprise an operating element which is configured to engage therewith by hand or by means of a hand tool, this in order to uncouple the motor shaft from the transmission means by hand, such a smoke evacuation shutter with a reversible motor now becomes more easily operable by hand. This smoke evacuation shutter no longer has to be at least partly dismantled in order to be able to operate it by hand.

[0013] Said uncoupling means preferably comprise an operating element for manually operating the uncoupling means.
The uncoupling means are preferably configured as mechanical uncoupling means, in which the manual uncoupling is achieved under the effect of forces which are applied manually (directly by hand or by means of a hand tool) to the operating element and transmitted via the uncoupling means.

[0014] More specifically, the transmission means may be configured as a gearwheel transmission in which the motor shaft is couplable to and uncouplable from a gearwheel from this gearwheel transmission in order to couple the motor shaft to, or to uncouple it from, these transmission means.

[0015] More specifically, the motor shaft may comprise an axle piece which is arranged so as to be displaceable along the length direction of the motor shaft, between a coupled state, in which this axle piece is coupled to the transmission means, for coupling the motor shaft, and an uncoupled state, in which this axle piece is uncoupled from the transmission means, for uncoupling the motor shaft.
Said axle piece is in this case preferably forced to its coupled state by means of a spring.

[0016] In this case, the uncoupling means may then, more specifically, for example comprise a handle as operating element, comprise an engagement element which engages with the axle piece and comprise at least one transmission arm which is hingeably connected to the handle and is hingeably connected to the engagement element. Instead of providing one such transmission arm, it is for example also possible to provide several arm parts which are connected so as to hinge with respect to each other.

[0017] In a preferred embodiment, the smoke evacuation shutter comprises a locking mechanism for locking and unlocking the door leaf which is operable by hand, as the locking mechanism is configured to engage therewith by hand or by means of a hand tool.
This locking mechanism may be arranged separately from said uncoupling means, but may also be connected thereto.
In this case, the operating element of the uncoupling means is then preferably incorporated in the locking mechanism in such a way that the operating element is operated when manually unlocking the door leaf in order to uncouple the motor shaft from the transmission means.
Thus, when manually opening the door leaf, it is possible, with a single movement, both to unlock the door leaf and uncouple the motor shaft.

[0018] Preferably, the operating element is in this case then incorporated in the locking mechanism in such a way that the motor shaft is coupled to the transmission means in the closed position and in locked state of the door leaf.

[0019] In this way, it is possible to ensure that the motor shaft, in the closed position and the locked state, will always reliably be coupled to the transmission means, so that the door leaf can be brought from its closed position to its open position by means of the motor in case of fire. This offers additional protection.

[0020] This locking mechanism is preferably an electronically actuable locking mechanism. Such electronically controlled locking mechanisms are described, for example, in EP 2 537 562 B1 and EP 2 695 426 A1.

[0021] In a specific embodiment, the locking mechanism is configured as a lock which is operable by means of a key via a keyhole, wherein the operating element is arranged in front of this keyhole and is provided with a corresponding keyhole in order to operate the operating element with said key.

[0022] In a preferred embodiment, a smoke evacuation shutter according to the present invention with a locking mechanism also comprises a resetting mechanism for resetting the locking mechanism when the door leaf has been brought to its open position.

[0023] The motor of a smoke evacuation shutter according to the present invention is preferably arranged on the door leaf. In an aesthetic embodiment, the motor is thereby arranged between two parallel panels of the door leaf.

[0024] Said locking mechanism, said resetting mechanism and said uncoupling means are preferably also arranged on the door leaf and are still more preferably arranged between these two parallel panels of the door leaf.

[0025] In a specific embodiment, a smoke evacuation shutter according to the present invention comprises connecting means for connecting the door leaf to the frame which are drivable by the motor in order to drive the rotating movement of the door leaf, comprising first connecting means which are partly arranged between the motor and a first edge of the door leaf which extends at right angles to the hinge pin and partly between this first edge and the frame, and second connecting means which are partly arranged between the motor and a second edge of the door leaf, opposite the first edge and partly between this second edge and the frame.

[0026] A motor of a smoke evacuation shutter to which the invention relates is preferably not arranged along the edges of the door leaf which are at right angles to the hinge pin in order, as far as possible, to prevent obstacles in the smoke evacuation duct in which this door leaf is arranged. By means of said connecting means, it is possible to position the motor on the door leaf without these connecting means being an obstacle to an aesthetic configuration of the smoke evacuation shutter. The first connecting means can simply be incorporated in the door leaf, while the second connecting means can easily be arranged along the corresponding edges of the door leaf, where they obstruct the smoke evacuation duct to a minimal extent. In this way, symmetrical loading of such a door leaf is possible.

[0027] Preferably, said connecting means which are arranged between said edges of the door leaf are in this case arranged between said leaves of the door leaf.

[0028] In a robust embodiment, the motor is provided in order to drive a driving shaft which extends between the first edge and the second edge and which forms part of the connecting means which are arranged between said edges of the door leaf and the transmission means are provided in order to couple the motor shaft to the driving shaft for transmitting the driving movement of the motor shaft to the driving movement of the driving shaft for driving the rotating movement of the door leaf.

[0029] The parts of the connecting means which are arranged between the edges of the door leaf and the frame are preferably configured as a drive arm or a number of drive arms which are hingeably coupled to each other.

[0030] At a first end, such drive arms (or sets of drive arms) are preferably fixedly connected to said driving shaft and are displaceably fitted in a slot in the frame at the other end.

[0031] Instead of providing such a driving shaft and drive arms, the connecting means which are drivable by the motor can be provided between the door leaf and the frame, for example, in the form of a cable and reel which is provided on the motor shaft and onto which the cable can be rolled.

[0032] More specifically, said resetting mechanism of the locking mechanism may comprise a drive arm between the locking mechanism and the driving shaft, wherein this drive arm is hingeably attached to a disc which is fixedly installed on the driving shaft. Alternatively, but less advantageously, this drive arm may be attached, for example, to the frame instead of to a disc on the driving shaft.

[0033] The object of the present invention is furthermore also achieved by providing a discharge system comprising a smoke evacuation shutter according to the present invention, as described above.

[0034] The present invention will now be explained in more detail by means of the following detailed description of a few preferred embodiments of a smoke evacuation shutter according to the present invention. The sole aim of this description is to give illustrative examples and to indicate further advantages and features of the present invention and can therefore by no means be interpreted as a limitation of the area of application of the invention or of the patent rights defined in the claims.

[0035] In this detailed description, reference numerals are used to refer to the attached drawings, in which:
  • Fig. 1 shows a smoke evacuation shutter according to the present invention in perspective, with the door leaf in its closed position in which the front panel of the door leaf has been omitted;
  • Fig. 2 shows the bottom part of the smoke evacuation shutter from Fig. 1 in perspective, with the door leaf in its closed position in which parts of the door leaf have been omitted;
  • Fig. 3 shows the bottom part of the smoke evacuation shutter from Fig. 1 in perspective, with the door leaf in a position between its closed position and its open position, in which parts of the door leaf have been omitted;
  • Fig. 4 shows the bottom part of the smoke evacuation shutter from Fig. 1 in perspective, with the door leaf in its open position, in which parts of the door leaf have been omitted;
  • Fig. 5 shows the bottom part of the smoke evacuation shutter from Fig. 1 in a front view with the door leaf in its closed position and in a locked state, in which parts of the door leaf have been omitted;
  • Fig. 6 shows a part of Fig. 5 at the location of the locking mechanism in more detail;
  • Fig. 7 shows a part of Fig. 5 at the location of the transmission means in more detail;
  • Fig. 8 shows the bottom part of the smoke evacuation shutter from Fig. 1 in front view with the door leaf in its closed position and in a coupled state, in which parts of the door leaf have been omitted;
  • Fig. 9 shows a part of Fig. 8 at the location of the locking mechanism in more detail;
  • Fig. 10 shows a part of Fig. 8 at the location of the transmission means in more detail.


[0036] The figures illustrate a smoke evacuation shutter (1) for installation in a smoke evacuation duct which is fittable to or in a wall to this end. Alternative embodiments for fitting in a ceiling may also be elaborated.

[0037] The illustrated smoke evacuation shutter (1) has a substantially rectangular cross section. It comprises a frame (2) for installing the smoke evacuation shutter (1) in the smoke evacuation duct.

[0038] In the frame (2), a door leaf (3) is arranged so as to be rotatable about a hinge pin (A), between a closed position, as illustrated in Figs. 1-2 and 5-10, in which the smoke evacuation duct is closed, and an open position, as illustrated in Fig. 4, in which the smoke evacuation duct is open. The door leaf (3) can also be placed in any position between its closed position and its open position, such as for example the position from Fig. 3. The smoke evacuation shutter (1) is normally closed. In this closed position, the smoke evacuation shutter (1) is able to prevent fire propagation for a certain amount of time. In case of fire, the smoke evacuation shutter (1) in the smoke evacuation duct may be opened, so that this does not form any obstacle in the spaces from which people are being evacuated.

[0039] A smoke evacuation shutter (1) may comprise one said door leaf (3), as illustrated, but may also comprise a number of such door leaves.
In the figures, the hinge pin (A) extends substantially vertically, but it may also extend horizontally or obliquely. In order to arrange the door leaf (3) so as to be hingeable, it may be hung by means of pivots or by means of pivot hinges.

[0040] The illustrated door leaf (3) comprises a first panel (33) made of fire-resistant material which extends substantially across the entire surface of the door leaf (3). A second panel (34) made of fire-resistant material is arranged in the door leaf (3) at an intermediate distance from the first panel (33), parallel to this first panel (33). This second panel (34) also extends substantially across the entire surface of the door leaf (3) and, in the illustrated embodiment, is configured to extend in the plane of the wall or the ceiling in which or on which the smoke evacuation shutter (1) is fitted.

[0041] The illustrated door leaf (3) furthermore comprises profiled sections (31) which substantially extend on the edges of the door leaf (3) which are arranged parallel to the hinge pin (A). These profiled sections (31) extend substantially between the panels (33, 34), so that the panels (33, 34) and the profiled sections (31) delimit a hollow space in the door leaf (3). In the centre of the door leaf (3), a transverse beam (32) is fitted between the profiled sections (31).

[0042] In order to open and close the door leaf (3), the smoke evacuation shutter (1) comprises a reversible motor (4). In this case, this motor (4) is fitted to the transverse beam (32), between the two panels (33, 34) of the door leaf (3). The motor (4) is provided in order to drive a motor shaft (5) of this motor (4). A gearwheel transmission (7) is provided to transmit the rotating movement of this motor shaft (5) into a rotating movement of a driving shaft (6).

[0043] The driving shaft (6) extends between the opposite edges of the door leaf (3) which are at right angles to the hinge pin (A). This driving shaft (6) is rotatably attached to two corresponding attachment bodies (29) which are attached to the first panel (33) of the door leaf (3). This driving shaft (6) extends substantially parallel to the hinge pin (A) and has a substantially square cross section. A first part of this driving shaft (6) extends between the motor (4) and a first edge of the door leaf (3), here the top edge, and a second part between the motor (4) and a second edge of the door leaf (3), here the bottom edge.

[0044] At the top edge and the bottom edge of the door leaf (3), drive arms (8) are fixedly connected to the driving shaft (6) by a first end. By a second end, these drive arms (8) are displaceably fitted in corresponding slots (30) which are provided in the frame (2). Instead of a single drive arm (8), it is also possible to provide drive arms which are coupled to each other.

[0045] According to a variant (not illustrated), the driving shaft (6) and the drive arms (8) as connecting means may be replaced, for example, by a cable and a reel may be provided on the motor shaft in order to wind up this cable.

[0046] A locking mechanism (11) is furthermore arranged on the transverse beam (32) between the panels (33, 34). Here, this locking mechanism (11) is substantially configured as described in EP 2 357 563 B1. The locking mechanism (11) is provided with a retractable pin which is forced to its locked position by means of a spring in order to lock the door leaf (3) in the smoke evacuation shutter (1). Furthermore, the locking mechanism (11) comprises an electromagnet (12). In the waiting position, a counterplate (13) made of ferromagnetic material is held against the electromagnet (12). When the electromagnet (12) is operated, it loses its retaining force, this counterplate (13) is released and the retractable pin is pulled back counter to the spring force, in order to unlock the door leaf (3). The retractable pin may also be operated by hand by turning the key (10) in the keyhole (28).

[0047] In order to reset the locking mechanism (11), the counterplate (13) in the illustrated embodiment is now connected to an additional arm (14). A first end of a rod (18) is displaceably attached to this additional arm (14) of the locking mechanism (11) and a second end is rotatably attached to a disc (19). This disc (19) is fixedly fitted to the driving shaft (6). An entrainment element (20) is resiliently fitted to the first end of the rod (18) by means of a spring (21) in order to entrain the additional arm (14) of the locking mechanism (11) when the door leaf (3) is brought to its open position, so as to reset the locking mechanism (11). Alternatively, the locking mechanism (11) may also be reset manually, as is described in EP 2 537 563 B1.

[0048] According to the invention, the smoke evacuation shutter (1) is furthermore also provided with uncoupling means (9) for manually uncoupling the motor shaft (5) of the transmission means (7).
To this end, an additional handle (15) is now also provided in the illustrated locking mechanism (11) and is also operable by turning the key (10) in the keyhole (28). A transmission arm (16) is on the one hand hingeably connected to this handle (15). On the other hand, this transmission arm (16) is hingeably connected to an engagement element (17). This engagement element (17) engages between projecting flanges (25, 26) of an axle piece (25, 26) of the motor shaft (5) which is displaceably arranged along the length direction of this motor shaft (5). By means of a spring (27), this axle piece (25, 26) is forced away (viewed in the figures towards the top) in order to couple the motor shaft (5) to a gearwheel from the gearwheel transmission (7), with pins (24) which are provided on this gearwheel engaging in corresponding holes in the axle piece (25, 26).
By turning the key (10) counterclockwise and thus tilting the handle (15), the transmission arm (16) and the engagement element (17) are also tilted, in which case this engagement element (17) moves the axle piece (25, 26) counter to the spring force (viewed in the figures towards the bottom) in order to uncouple the axle piece (25, 26) from said gearwheel from the gearwheel transmission (7) (see Figs. 5-7).
When turning the key (10) clockwise, the axle piece (25, 26) is left clear and is forced back into said gearwheel of the gearwheel transmission (7) under the effect of the spring (27) (see Figs. 8-10).

[0049] Normally, the door leaf (3) is in its closed position and the locking mechanism (11) is locked, as is illustrated in Fig. 5. The counterplate (13) is held against the electromagnet (12) and the retractable pin holds the door leaf (3) in its closed position.

[0050] In case of fire or in order to operate the smoke evacuation shutter (1), the locking mechanism (11) may be unlocked by operating the electromagnet (12), as a result of which the counterplate (13) is released, as is shown in Fig. 2. The motor (4) is consequently driven to bring the door leaf (3) from its closed position to its open position, as is illustrated in Figs. 2 to 4. The drive arms (8) of the connecting means are in this case guided in the slots (30) in the frame (2). Furthermore, the disc (19) on the driving shaft (6) entrains the rod (18), in which case the entrainment element (20) entrains the additional arm (14) of the locking mechanism (11) at the end of the rotating movement and pushes the counterplate (13) back against the electromagnet (12), so that the locking mechanism (11) is reset. The door leaf (3) may be returned from its open position to its closed position by allowing the motor (4) to turn the motor shaft (5) in the reverse direction.

[0051] It is also possible to operate the door leaf (3) manually instead of by means of the electromagnet (12) and the motor (4). By turning the key (10) counterclockwise, on the one hand, the motor shaft (5) of the gearwheel transmission (7) is uncoupled as described above and, on the other hand, the locking mechanism (11) is unlocked, as described in EP 2 537 563 B1. The door leaf (3) can then be freely rotated by hand until it reaches it open position. In this open position, the locking mechanism (11) is reset by the disc (19), rod (18) and entrainment element (20). The additional handle (15) of the locking mechanism (11) is rotatable separately from the counterplate (13) and additional arm (14). Thus, this handle (15) can be rotated separately by means of the key (10), so that the motor shaft (5) is also uncoupled from the gearwheel transmission (7) in this locked state in order not to hamper the manual turning back of the door leaf (3). Only when the door leaf (3) has almost been pulled shut, the key (10) will be turned clockwise towards the extreme position in order to block the key in the keyhole (28) so as to be able to pull the door leaf (3) completely shut. During this last movement, in which the door leaf (3) is moved from almost shut to shut, the pins (24) are coupled to the axle piece (25) due to the fact that the axle piece (25) is moved upwards by the spring (27). When this happens, the motor (4) is coupled again. In order to be able to move the door leaf (3) still further when this coupling is already taking place before the door leaf (3) is pulled completely shut, the tolerance between operating arms (8) and slots (30) is configured to be sufficiently large.


Claims

1. Smoke evacuation shutter (1) comprising:

- a frame (2) for installing the smoke evacuation shutter (1) in a smoke evacuation duct;

- at least one door leaf (3) which is arranged in the frame (2) so as to be rotatable about a hinge pin (A) between a closed position and an open position;

- a motor (4) which is configured to drive a motor shaft (5) of this motor (4);

- transmission means (7) for transmitting the driving movement of the motor shaft (5) to the rotating movement of the door leaf (3);

- uncoupling means (9) for uncoupling the motor shaft (5) from the transmission means (7);

characterized in that the motor (4) is configured as a reversible motor (4) and in that the uncoupling means (9) comprise an operating element (15) for manually uncoupling the motor shaft (5) of the transmission means (7).
 
2. Smoke evacuation shutter (1) according to Claim 1, characterized in that the motor shaft (5) comprises an axle piece (25, 26) which is arranged so as to be displaceable along the length direction of the motor shaft (5), between a coupled state, in which this axle piece (25, 26) is coupled to the transmission means (7), for coupling the motor shaft (5), and an uncoupled state, in which this axle piece (25, 26) is uncoupled from the transmission means (7), for uncoupling the motor shaft (5).
 
3. Smoke evacuation shutter (1) according to Claim 2, characterized in that the uncoupling means (9) comprise a handle (15) as operating element (15), an engagement element (17) which engages with the axle piece (25, 26) and at least one transmission arm (16) which is hingeably connected to the handle (15) and is hingeably connected to the engagement element (17).
 
4. Smoke evacuation shutter (1) according to one of the preceding claims, characterized in that the smoke evacuation shutter (1) comprises a locking mechanism (11) for locking and unlocking the door leaf (3) which is operable by hand, and in that the operating element (15) of the uncoupling means (9) is incorporated in the locking mechanism (11) in such a way that the operating element (15) is operated when manually unlocking the door leaf (3) in order to uncouple the motor shaft (5) from the transmission means (7).
 
5. Smoke evacuation shutter (1) according to Claim 4, characterized in that the operating element (15) of the uncoupling means (9) is incorporated in the locking mechanism (11) in such a way that the motor shaft (5) is coupled to the transmission means (7) in the closed position of the door leaf (3) and in locked state of the door leaf (3).
 
6. Smoke evacuation shutter (1) according to Claims 4 and 5, characterized in that the locking mechanism (11) is configured as a lock which is operable by means of a key (10) via a keyhole (28) and in that the operating element (15) is arranged in front of this keyhole and is provided with a corresponding keyhole (28) in order to operate the operating element (15) with said key (10).
 
7. Smoke evacuation shutter (1) according to one of Claims 4 to 6, characterized in that the smoke evacuation shutter (1) comprises a resetting mechanism for resetting the locking mechanism (11) when the door leaf (3) has been brought to its open position.
 
8. Smoke evacuation shutter (1) according to one of the preceding claims, characterized in that the motor (4) is arranged on the door leaf (3).
 
9. Smoke evacuation shutter (1) according to Claim 8, characterized in that the motor (4) is arranged between two parallel panels (33, 34) of the door leaf (3).
 
10. Smoke evacuation shutter (1) according to Claim 8 or 9, characterized in that the smoke evacuation shutter (1) comprises connecting means (6, 8) for connecting the door leaf (3) to the frame (2) which are drivable by the motor (4) in order to drive the rotating movement of the door leaf (3), comprising first connecting means which are partly arranged between the motor (4) and a first edge of the door leaf (3) which extends at right angles to the hinge pin (A) and partly between this first edge and the frame (2), and second connecting means which are partly arranged between the motor and a second edge of the door leaf (3), opposite the first edge and partly between this second edge and the frame (2).
 
11. Smoke evacuation shutter (1) according to Claims 9 and 10, characterized in that the connecting means which are arranged between said edges of the door leaf (3) are arranged between said leaves (33, 34) of the door leaf (3).
 
12. Smoke evacuation shutter (1) according to Claim 10 or 11, characterized in that the motor (4) is provided in order to drive a driving shaft (6) which extends between the first edge and the second edge and which forms part of the connecting means (6, 8) which are arranged between said edges of the door leaf (3), and in that the transmission means (7) are provided in order to couple the motor shaft (5) to the driving shaft (6) for transmitting the driving movement of the motor shaft (5) to the driving movement of the driving shaft (6) for driving the rotating movement of the door leaf (3).
 
13. Smoke evacuation shutter (1) according to Claims 7 and 12, characterized in that the resetting mechanism of the locking mechanism (11) comprises a rod (18) between the locking mechanism (11) and the driving shaft (6), wherein the rod (18) is hingeably attached to a disc (19) which is fixedly installed on the driving shaft (6).
 
14. Discharge system comprising a smoke evacuation shutter (1), characterized in that this smoke evacuation shutter (1) is a smoke evacuation shutter (1) according to one of the preceding claims.
 




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Cited references

REFERENCES CITED IN THE DESCRIPTION



This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

Patent documents cited in the description