ASSEMBLY OF FRAMES FOR A SMOKE EVACUATION DAMPER WITH SHUTTER

Abstract

 The invention relates to an assembly of frames (1) for installing a smoke evacuation damper with shutter, comprising a sub-frame (2) with a covering part (2a) and an insertion part (2b), perpendicular with respect to same; a main frame (3) for assembling with a covering part (3a) and an insertion part (3b) resting respectively against the covering part (2a) and the insertion part (2b) of the sub-frame (2); a fastening piece (4a), provided on the insertion part (2b) of the sub-frame (2), raised with respect to same; a second fastening piece (5a), provided on the insertion part (3b) of the main frame (3), raised with respect to same and being positioned not as far from the covering part (2b) of the sub-frame (2) as the first fastening piece (4a); and fastening means (6) for assembling the second fastening piece (5a) on the first fastening piece (4a).

Description

[0001] The present invention relates to an assembly of frames for a smoke evacuation damper with shutter, for installing the damper in a smoke evacuation shaft, comprising

• a sub-frame for assembling the damper in the shaft

  ∘ with a covering part for coming to bear against the wall;

  ∘ and an insertion part, perpendicular with respect to the covering part, for penetrating into the shaft;

• and a main frame for assembling on the sub-frame

  ∘ with a covering part resting against the covering part of the sub-frame;

  ∘ and an insertion part resting against the insertion part of the sub-frame.

[0002] Smoke evacuation dampers with shutters are usually part of a smoke and heat evacuation system. The dampers are usually installed in a smoke evacuation shaft. These evacuation systems are intended above all for the mechanical smoke evacuation from buildings in the aim of facilitating the evacuation of people.

[0003] A smoke evacuation damper of this type is usually closed and resists fire when it is in the closed position. The damper is only open in the event of fire so as to allow a controlled evacuation of smoke. The damper then opens in the smoke evacuation shaft. In the event of fire, a control system only opens the shafts needed to ensure evacuation of the smoke. The other dampers, which cannot contribute to the desired evacuation, remain closed and must then resist the fire.

[0004] Such a damper typically has an essentially rectangular cross section and the frames of such a damper typically delimit a rectangular opening.

[0005] Such a damper can comprise a sub-frame (or back frame) for facilitating the installation of the damper in the shaft in the wall or ceiling. Such dampers are described for example in FR 3 001 756 A1, FR 2 994 990 A1 and EP 2 357 026 A1. In this type of shutter, the frame is typically screwed against the sub-frame by screwing the covering part of the main frame to the covering part of the sub-frame. Typically, a covering grid that is placed in front of the frame to hide these screws from view.

[0006] Similar dampers nevertheless exist without a covering grid, in which the frame remains visible in assembled state. The invention relates to this type of damper. In this type of damper, so as to hide the screws from view, the insertion part of the sub-frame is typically provided with rivet nuts and the frame is screwed against the sub-frame by screwing the insertion part of the main frame to these nuts. However, several disadvantages are associated with this installation. A first disadvantage is that cavities have to be provided for the application of the nuts. A second disadvantage is that it is difficult to ensure that the covering part of the main frame is duly placed against the covering part of the sub-frame. This way, there is often a gap between the covering parts and this is not desirable for aesthetic reasons and in order to be able to guarantee that the damper is sealed.

[0007] The aim of the invention therefore consists of providing an assembly in which these problems are resolved.

[0008] This aim is achieved by making an assembly of frames for a smoke evacuation damper with shutter for installing the damper in a smoke evacuation shaft, comprising

• a sub-frame for installing the damper in the shaft

  ∘ with a covering part for coming to bear against the wall;

  ∘ and an insertion part, perpendicular with respect to the covering part, for penetrating into the shaft;

• a main frame for assembling on the sub-frame

  ∘ with a covering part resting against the covering part of the sub-frame;

  ∘ and an insertion part resting against the insertion part of the sub-frame;

• a first fastening piece, provided on the insertion part of the sub-frame, raised with respect to this part so as to extend into the shaft;
• a second fastening piece, provided on the insertion part of the main frame, raised with respect to this part so as to extend into the shaft, this second fastening piece in assembled state being positioned not as far from the covering part of the sub-frame as the first fastening piece;
• and fastening means for assembling the second fastening piece on the first fastening piece.

[0009] With these fastening pieces and the fastening means, it is possible to fasten the frames of the damper together in the shaft, behind the plane of the wall, so that the fastening means can be hidden from sight by a door leaf of the damper or by several door leaves of the damper. Furthermore, they do not require any screws.

[0010] Thanks to the positioning of the fastening pieces, it is possible to fasten fastening pieces together in a direction at least partially oblique with respect to the plane of the wall. By fastening the pieces in such a direction, it is much easier to avoid gaps between the covering parts, because when screwing the fastening means, the damper is drawn against the smoke evacuation shaft.

[0011] The frames of an assembly according to the invention can be made for example in extruded aluminium profiles, in punched and folded steel or in steel or profile aluminium. The fastening pieces are preferably made in steel.

[0012] In the continuation of this general description, only one unit of a first fastening piece, of a second fastening piece and of fastening means is mentioned. Nevertheless - so as to fasten the frames with more certainty without gaps - several of these units are preferably present on the periphery of the frames of an assembly according to the invention. It is possible for example to envisage two such units at the top of the frames and two of such units at the bottom of the frames.

[0013] According to a preferred form of the invention, the second fastening piece is positioned not as far from the covering part of the main frame as the first fastening piece is positioned with respect to the covering part of the sub-frame and the fastening means are provided to draw this second fastening piece towards the first fastening piece.

[0014] By drawing these fastening pieces towards each other, gaps are avoided with greater certainty.

[0015] The first fastening piece is preferably part of a first fastening plate that is fastened to the insertion part of the sub-frame. Likewise, the second fastening piece is preferably part of a second fastening plate that is fastened to the insertion part of the main frame.

[0016] The second fastening part can for example consist of a second leg of a second fastening plate whose first leg is fastened to the insertion part of the main frame.

[0017] In an advantageous embodiment variant of the invention, the second fastening plate is flexible and is installed rotationally between a stowed position in which the second fastening piece is placed above the insertion part of the main frame and a deployed position in which the second fastening piece is disposed next to the insertion part of the main frame.

[0018] This way, the assembly can be transported in a compact way by positioning the second fastening plate in its stowed position.

[0019] In such a variant, the insertion part of the main frame is preferably equipped with a stop for limiting the rotating movement of the second fastening plate in its deployed position.

[0020] Such a stop can advantageously be part of a corner piece or of a hinge of the main frame.

[0021] In a preferred embodiment of such a variant, the first fastening plate comprises a base that is fastened to the insertion part of the sub-frame so as to fasten the fastening plate to this insertion part, the first fastening piece is raised with respect to this base and the first fastening plate is provided with a flexible stop that is raised with respect to the base and is placed between the insertion part of the sub-frame and the first fastening piece, so as to press the second fastening plate against the insertion part of the main frame. Such a flexible stop prevents the elastic movement of the second fastening plate in assembled state of the assembly.

[0022] A screw is preferably provided as fastening means.

[0023] In this case, the second fastening piece is preferably provided with an oblong hole for inserting a screw there so as to assemble the second fastening piece on the first fastening piece.

[0024] According to a preferred characteristic of the invention, the fastening means are assembled at an angle with respect to the plane of the insertion part of the sub-frame, so as to facilitate the fastening of the fastening means behind the plane of the wall.

[0025] For this purpose, each fastening piece is preferably positioned at an angle with respect to the plane of the respective insertion part.

[0026] The aim of the invention is also achieved by making a smoke evacuation damper with shutter, comprising an assembly according to the invention as described above.

[0027] The present invention will now be explained in a more detailed manner by describing an assembly of frames for a preferred smoke evacuation damper according to the invention. The sole aim of this description is to provide an illustrative example of the invention and to reveal other advantages and details of these dampers according to the invention, and it must in no event be interpreted as a limitation of the scope of utilization of the invention or of the patent rights requested in the claims.

[0028] In this detailed description, the numerical references refer to the attached drawings, in which:

Figure 1 is a front view of an assembly according to the invention;

Figure 2 is a sectional view of the assembly in Figure 1, section along the axis A in Figure 1;

Figure 3 is a more detailed view of part B of Figure 2;

Figure 4 shows a sub-frame according to the invention in perspective, provided with first fastening pieces with screws as fastening means;

Figure 5 shows a main frame according to the invention in perspective, provided with second fastening pieces;

Figure 6 is a more detailed view of a corner of the frame of Figure 4, seen from the back of it and provided with a first fastening piece with a screw;

Figure 7 is a more detailed view of part C of Figure 5.

[0029] The figures show an assembly of frames (1) for a smoke evacuation damper with shutter for installation in a smoke evacuation shaft. This damper can be installed in a smoke evacuation shaft. The damper according to the invention is particularly appropriate for being part of a smoke and heat evacuation system that is intended for the mechanical smoke evacuation of buildings, in the aim of facilitating the evacuation of people.

[0030] The assembly of frames (1) comprises a sub-frame (2) in a main frame (3). These frames (2, 3) have an essentially rectangular cross section.

[0031] The sub-frame is provided for installing the damper in the shaft, encased in this shaft. This sub-frame (2) has steel profiles. A covering part (2a) of the profiles is provided to come to bear against the wall or the ceiling. An insertion part (2b) of the profiles is perpendicular with respect to the covering part (2a) and is provided to penetrate the shaft. In Figure 4, the sub-frame is also provided with crosspieces (11) that must be unscrewed. The plates (12) to which these crosspieces (11) are screwed, must be folded back.

[0032] The main frame (3) is provided for assembling to the sub-frame (2), encased in this sub-frame (2). This main frame (3) has aluminium profiles. These profiles can be extruded. In assembled state (see Figures 1 to 3), a covering part (3a) of the profiles of the main frame (3) rests against the covering part (2a) of the sub-frame (2) and an insertion part (3b) rests against the insertion part (2b) of the sub-frame (2). The main frame (3) as illustrated further includes elements in refractory material (14), intended to ensure that the structure of the frame (3) is at least partially retained in the event of fire, and in the event of the damper remaining closed, must resist fire. In the main frame (3), a door leaf can be installed by means of hinges, so that the door leaf can pivot in the smoke evacuation shaft, between a closed position in which the shaft is closed, and an open position in which the shaft is open. A damper can comprise a single door leaf, as envisaged in the illustrated assembly, but can also comprise several door leaves. The main frame (3) as illustrated is provided with a seal (13), which, when the door leaf is in the closed position, is positioned between the aluminium profiles of the main frame (3) and the door leaf, so as to ensure sealing against cold air of the door leaf when same is in this closed position. For this purpose, the aluminium profiles of the main frame (3) include grooves in which the seal (13) is inserted. The seal (13) can be made in rubber or silicone.

[0033] So as to assemble the main frame (3) to the sub-frame (2), the assembly (1) comprises first fastening plates (4), second fastening plates (5) and screws (6) for screwing the second fastening plates (5) to the first fastening plates. Two of these first fastening plates (4) are installed at the top of the sub-frame (2) and two of these first fastening plates (4) are installed at the bottom of the sub-frame (2), each time at the insertion part (2b) of the of the sub-frame (2). At corresponding places, two of the second fastening plates (5) are installed at the top of the main frame (3) and two of the second fastening plates (5) are installed at the bottom of the main frame (3), each time at the insertion part (3b) of the main frame (3).

[0034] Each second fastening plate (5) is provided in the form of a steel plate, punched and folded. A first leg (5b) of this fastening plate (5) is fastened to the insertion part of the main frame (3) so as to fasten this fastening plate (5) to the main frame (3). A second leg (5a) of this fastening plate (5) is positioned at an angle with respect to the first leg (5b), so that this second leg (5a) is raised with respect to the first leg (5b) so as to extend into the shaft. This second leg (5a) is provided with an oblong hole (5c) for inserting a screw (6) there so as to assemble the second fastening plate (5) to the first fastening plate (4).

[0035] The second fastening plate (5) is flexible and is installed rotationally between a stowed position in which the first leg (5b) is placed above the insertion part (3a) of the main frame (3), and a deployed position, as illustrated, in which the first leg (5b) is disposed next to the insertion part (3a) of the main frame (3). Corner pieces (8) of the main frame (3) serve as retaining elements so as to limit the movement of the second fastening plate (5) in its deployed position.

[0036] Each first fastening plate (4) is also provided in the form of a steel plate, punched and folded. This first fastening plate (4) comprises a base (4b) that is fastened to the insertion part (2b) of the sub-frame (2) so as to fasten this fastening plate (4) to the sub-frame (2). A fastening piece (4a) is positioned at an angle with respect to the base (4b), so that this fastening piece (4a) is raised with respect to the base (4b) so as to extend into the shaft. This fastening piece (4a) is provided with an opening for inserting a screw (6) there so as to assemble the second fastening plate (5) to the first fastening plate (4). The second leg (5a) of the second fastening plate (5) is positioned not as far from the covering part (3a) of the main frame (3) as the fastening piece (4a) of the first fastening plate (4) is positioned with respect to the covering part (2a) of the sub-frame (2). A flexible stop (4c) is raised with respect to the base (4b) and is placed between the insertion part (2a) of the sub-frame (2) and the fastening piece (4a), so as to press the second fastening plate (5) against the insertion part (3b) of the main frame (3).

[0037] By screwing the screws (6), the second leg (5a) of the second fastening plate (5) is drawn towards the fastening piece (4a) of the first fastening plate (4). This way, the covering part (3a) of the main frame (3) is drawn against the covering part (2a) of the sub-frame (2) until the gaps between the two (3a, 2a) have disappeared.

Claims

1. Assembly of frames (1) for a smoke evacuation damper with shutter, for installing the damper in a smoke evacuation shaft, comprising

- a sub-frame (2) for installing the damper in the shaft

∘ with a covering part (2a) for coming to bear against the wall;

∘ and an insertion part (2b), perpendicular with respect to the covering part (2a), for penetrating into the shaft;

- and a main frame (3) for assembling on the sub-frame (2)

∘ with a covering part (3a) resting against the covering part (2a) of the sub-frame (2);

∘ and an insertion part (3b) resting against the insertion part (2b) of the sub-frame (2);

characterized in that the assembly (1) comprises

- a first fastening piece (4a), provided on the insertion part (2b) of the sub-frame (2), raised with respect to this part (2b) so as to extend into the shaft;

- a second fastening piece (5a), provided on the insertion part (3b) of the main frame (3), raised with respect to this part (3b) so as to extend into the shaft, this second fastening piece (5a) in assembled state being positioned not as far from the covering part (2b) of the sub-frame (2) as the first fastening piece (4a);

- fastening means (6) for assembling the second fastening piece (5a) on the first fastening piece (4a).

2. Assembly (1) according to Claim 1, characterized in that the second fastening piece (5a) is positioned not as far from the covering part (3a) of the main frame (3) as the first fastening piece (4a) is positioned with respect to the covering part (2a) of the sub-frame (2) and that the fastening means (6) are provided to draw this second fastening piece (5a) towards the first fastening piece (4a).

3. Assembly (1) according to either one of the preceding claims, characterized in that the first fastening piece (4a) is part of a first fastening plate (4) of the assembly (1), this first fastening plate (4) being fastened to the insertion part (2b) of the sub-frame (2) and/or in that the second fastening piece (5a) is part of a second fastening plate (5) of the assembly (1), this second fastening plate (5) being fastened to the insertion part (3b) of the main frame (3).

4. Assembly (1) according to Claim 3, characterized in that the second fastening plate (5) is flexible and is installed rotationally between a stowed position in which the second fastening piece (5a) is placed above the insertion part (3a) of the main frame (3), and a deployed position in which the second fastening piece (5a) is disposed next to the insertion part (3a) of the main frame (3).

5. Assembly (1) according to Claim 4, characterized in that the insertion part (3b) of the main frame (3) is equipped with a stop (4c) for limiting the rotating movement of the second fastening plate (5) in its deployed position.

6. Assembly (1) according to Claim 3 and Claim 4 or 5, characterized in that the first fastening plate (4) comprises a base (4b) that is fastened to the insertion part (2b) of the sub-frame (2) so as to fasten the fastening plate (4) to this insertion part (2b), that the first fastening piece (4a) is raised with respect to this base (4b), and that the first fastening plate (4) is provided with a flexible stop (4c) that is raised with respect to the base (4b) and is placed between the insertion part (2b) of the sub-frame (2) and the first fastening piece (4a), so as to press the second fastening plate (5) against the insertion part (3b) of the main frame (3).

7. Assembly (1) according to any one of the preceding claims, characterized in that a screw (6) is provided as fastening means.

8. Assembly (1) according to Claim 7, characterized in that the second fastening piece (5a) is provided with an oblong hole (4d) for inserting the screw (6) there so as to assemble the second fastening piece (5a) on the first fastening piece (4a).

9. Assembly (1) according to any one of the preceding claims, characterized in that the fastening means (6) are assembled at an angle with respect to the plane of the insertion part (2b) of the sub-frame (2).

10. Smoke evacuation damper, comprising an assembly (1) according to any one of the preceding claims.

Drawing