[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.
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.