EP3029212B1 - Suspended ceiling with fire-resistant housing - Google Patents

Description

The invention relates to a hollow ceiling with a panel forming the underside of the hollow ceiling and with a fire protection housing positioned behind the panel for electrotechnical installations, the panel having an opening in the area of the arrangement of the fire protection housing.

In the prior art, it is known to arrange a housing on the rear of a hollow ceiling, which housing accommodates electrical components. This case is arranged on the back of the paneling of the hollow ceiling in the area of an opening in the paneling. This opening is suitable and intended for the use of a lamp, for example. The lamp can be inserted into this opening and fixed to it.

The installation of the housing through this opening is not possible, since the housing is considerably larger than this opening, which is intended for the use of the lamp. As a result, the installation is complex and only possible if the space of the hollow ceiling behind the planking is accessible for assembly.

This prior art is in WO 2004 / 018934A1 as well as in the EP 1 564 339 A2 , the US 2008/010907 A1 and the US 2008/170404 A1 explained.

It is also known to provide hood-like cover housings for built-in lights which, starting from a base plate, have legs which can be moved elastically. A corresponding opening is provided in the hollow ceiling for installation in a hollow ceiling. The cover housing can be pushed in through this opening with the legs pressed together. Spread your legs then behind the installation opening or in this and enable a firm fit in the installation opening, whereby a built-in lamp can also be arranged in this element. Examples of such configurations are DE 19937617 C2 , the DE 20217028 U1 and the DE 202007012107 U1 refer to.

A similar embodiment is from EP 0427498 B1 known. Such configurations are not suitable for fire protection purposes, however, since they form large free spaces in the rear area starting from the opening in the hollow ceiling, which allow air or even fire gases to pass through.

From the DE 4338841 A1 a luminaire with a lamp housing is known in which the lamp housing is a molded part made of a rubber-elastic material that can be inserted into a perforation in a ceiling or wall. Such a configuration makes it possible to insert and hold this lamp from the front in the corresponding opening of a hollow ceiling. The installation space made available by this configuration is very limited such an arrangement is not suitable for fire protection purposes.

A suitable design of a fire protection housing for the specified fire protection purposes is from DE 10245397 A1 known. The housing is larger than the installation opening and is made of dimensionally stable material. So that this fire protection housing can be installed through the opening in the ceiling, it is divided into several components, namely two L-shaped side parts and two partial covers, which form the overall cover. These items can be assembled through the opening and assembled behind the opening.

Based on this prior art, the invention is based on the object of providing a hollow ceiling with a fire protection housing, in which a dimensionally stable and heat-resistant fire protection housing can be mounted from the front of the hollow ceiling through the opening in the hollow ceiling and so positioned behind the hollow ceiling is that the opening is covered as a whole by the fire protection housing.

To solve this problem, it is proposed that the opening is rectangular with a length L and a width B, that the fire protection housing is dimensionally stable, consists of a one-piece sheet metal housing and forms a cuboid shape with a length LB, a width BB and a height HB a base in the installation position rests against the rear side of the planking and has an installation opening, and that the width BB of the fire protection housing is shorter than the length L of the opening and the height HB of the fire protection housing shorter than the width B of the opening, and that the length LB of the fire protection housing is dimensioned greater than the length L of the opening and the width BB of the fire protection housing is dimensioned greater than the width B of the opening, that the formation of the opening in the planking Rectangular cladding cut out of the cladding is inserted into the opening and in this position either attached to the cladding or to the fire protection housing, the cladding cutout forming a closed surface element or a partial area having at least one installation opening for the installation of electrical components.

According to this arrangement and configuration, it is possible to mount the cuboid fire protection housing through the rectangular opening by inserting the fire protection housing with a narrow end face first into the opening from below and pushing it behind the paneling. The housing can then be aligned parallel to the rear of the paneling and rotated by 90 degrees, an installation situation then being created in which the opening is completely separated from the Fire protection housing is covered, so there are no gaps between the soffit of the opening and the fire protection housing, but the fire protection housing completely covers the opening and its marginal edges.

The fire protection housing is preferably made of sheet steel so that it is not only dimensionally stable and can withstand corresponding loads, but is also sufficiently temperature-stable, so that it can withstand a fire-related temperature effect for a sufficient time even in the event of a fire.

The hollow ceiling can be constructed in the usual way, with the planking being formed, for example, by plasterboard or the like, preferably in multiple layers, and preferably complying with fire protection regulations.

For assembly, the fitter can receive a template attached to the fire protection housing that shows the dimensions of the installation opening so that the fitter can cut the installation opening into the paneling of the hollow ceiling accordingly. Then the fire protection housing can be inserted and positioned. All marginal edges of the installation opening are then covered in such a way that they lie within the space surrounded by the fire protection housing.

The fire protection housing can be made very large. For example, dimensions of 250 mm Length, 200 mm width and 100 mm height possible. A large installation space is thus made available within the fire protection housing, so that a whole series of electrical components can be installed in the housing. The supply of supply cables can take place through corresponding wall openings, preferably in the area of the end walls of the fire protection housing.

According to this embodiment, the rectangular cladding cutout from the cladding, which is cut out of the hollow ceiling to form the opening, is reinserted into the opening after the fire protection housing has been installed and fastened to the cladding or preferably to the fire protection housing. This cladding cutout can initially be a closed surface element so that the installation opening for the installation of electrotechnical components in the fire protection housing is not yet accessible. A blind arrangement is practically achieved. If this element is then to be used for the installation of electrotechnical components, at least one installation opening can be made from the cladding cutout in a partial area be cut out. Installations can be fed through this installation opening, for example electrical lights or loudspeakers can be built into these installation openings.

It is also possible to arrange electrotechnical components and assign the electrotechnical wiring before the cladding cutout is inserted into the opening, so that the cladding cutout is then inserted into the opening and subsequently only the wiring of the light or the loudspeaker or the like which can be inserted into the installation opening of the cladding cut-out.

After being inserted into the opening, the cladding cutout can, for example, be connected to the edge of the opening, for example plastered in. It is also possible to attach the cladding cutout to the cladding in a different way. It is preferably provided that the cladding cutout is attached to components of the fire protection housing, so that a permanent and durable arrangement is achieved.

A further development that is particularly preferred for fire protection purposes is that the fire protection housing has a coating or an insert made of intumescent material on the inside, which leaves the installation opening free.

This means that in the event of a fire, the volume of the intumescent material is increased considerably, which means that the fire protection housing and the installation opening are filled with intumescent material, so that the penetration of fire gases and smoke gases and the direct penetration of fire is prevented. A particularly preferred development is seen in the fact that in the area of the fire protection housing, which is opposite the base surface adjacent to the planking and forms the floor of the fire protection housing, a plate is attached to the inner, intumescent coating or the area of the insert made of intumescent material there made of temperature-resistant material is attached by means of at least one anchor which has an area dimension that is larger than the installation opening in the cladding cutout.

According to this refinement, there is quasi on the bottom of the fire protection housing, which is opposite of the base surface forming the installation openings, namely on the one located there internal intumescent coating or the area of the insert made of intumescent material located there, a plate made of temperature-resistant material is attached by means of at least one anchor. Several anchors can also be used for fastening. This plate has such a surface dimension that is at least larger than the installation opening in the cladding cutout. This plate could have a maximum dimension that corresponds to the clear width of the fire protection housing between the components made of intumescent material. The purpose of this configuration is that, for example, in the event of a fire, if a temperature arises in the fire protection housing due to external influences that causes the intumescent material to increase in volume, the connection to the anchors is released due to this softening and foaming of the material, so that the plate after can fall down towards the installation opening. In the event of a fire load from below, through which the built-in device, for example the lamp or the loudspeaker, may burn or fall out of the housing, the resulting opening can be opened by means of the plate are closed at least so far that the foaming intumescent material is not or hardly discharged from the housing. The foaming intumescent material can condense within the housing, so that a temperature insulating path is formed.

For example, screws can be used as anchors for fastening by means of which the plate is held on the intumescent material.

Another preferred embodiment is that the insert made of intumescent material and arranged in the fire protection housing is designed similar to the shape of the fire protection housing, an air gap being formed between the side walls and the bottom wall of these parts.

According to this embodiment, an air gap is formed between the wall of the fire protection housing and the insert made of intumescent material, which has an insulating effect and is therefore conducive to the fire protection purpose.

Furthermore, it is preferably provided that on the mouth edge of the fire protection housing, which forms the base surface adjacent to the rear side of the cladding or is part of the same, flange parts are formed or molded, which protrude into the opening of the cladding, the cladding cutout inserted into the opening with Fastening means that reach through this, is detachably or non-detachably fastened to the flange parts, and / or that on the mouth edge of the fire protection housing transversely outwardly or inwardly protruding flange parts are formed or formed, which rest on the rear side of the cladding next to the opening and which by means of the cladding penetrating fasteners are attached to the planking.

This configuration ensures that the fastening means for fastening the fire protection housing to the cladding and the means for fastening the cladding cutout in the opening of the cladding are achieved by components that are formed on the fire protection housing itself. For example, on the fire protection housing, which is preferably made of sheet metal, flanges or Flange parts are formed and angled at right angles, which protrude transversely into the opening of the planking, so that the planking cutout subsequently reinserted into the opening can be placed against these flange parts in order to achieve the desired positioning and then with fastening means that reach through the planking cutout and into the Flange parts are screwed in or fastened to them in some other way, a detachable or non-detachable fastening takes place. For this purpose, the flange parts can have several perforations into which fastening means can be screwed at different points. The same is provided with regard to the flange parts protruding transversely outward or also inwardly protruding flange parts at the mouth edge of the fire protection housing. These flange parts can be angled outwards and then rest on the back of the cladding or they can also be angled inwards so that they are positioned in the edge area between the edge of the side walls of the fire protection box and the opening in the cladding. These are in turn by screws or the like, which can be screwed through the cladding from the front of the cladding and can be screwed into the flange parts, can be fixed. Embodiments of the invention are shown in the drawing and described in more detail below.

• Fig.1 eine Hohldecke mit Brandschutzgehäuse in einer Montagesolllage, teilweise aufgebrochen;
• Fig.2 eine Ansicht einer Hohldecke mit hinter der Hohldecke angeordnetem Brandschutzgehäuse von unten gesehen;
• Fig.3 ein Brandschutzgehäuse in Ansicht;
• Fig.4 eine alternative eines Brandschutzgehäuses ebenfalls in Ansicht;
• Fig.5 desgleichen von schräg oben gesehen.

It shows:

• Fig.1 a hollow ceiling with fire protection housing in a target assembly position, partially broken open;
• Fig. 2 a view of a hollow ceiling with a fire protection housing arranged behind the hollow ceiling, seen from below;
• Fig. 3 a fire protection housing in view;
• Fig. 4 an alternative of a fire protection housing also in view;
• Fig. 5 also seen obliquely from above.

The drawing shows a planking 1 which forms the underside of a hollow ceiling and consists of two layers of plasterboard. Furthermore, a fire protection housing 2 positioned in the installation position behind the paneling 1 is shown, which is used for electrotechnical installations. The cladding 1 is provided with an opening 3 in the area of the arrangement of the fire protection housing 2, which in particular is shown in FIG Figure 2 is clearly visible. This opening 3 is rectangular with a length L and a width B. The fire protection housing 2 is dimensionally stable and consists for example of a one-piece sheet metal housing, which is easy to manufacture and can be formed from a one-piece sheet metal blank. This fire protection housing 2 forms a cuboid shape with a length LB, a width BB and a height HB.

As in particular in Figure 1 As can be seen, its base 4 rests against the rear of the cladding 1. Furthermore, the fire protection housing 2 has a Installation opening 5. The width BB of the fire protection housing 2 is at most equal to the length L of the opening 3 or shorter than this length L. The height HB of the fire protection housing 2 is equal to the width B of the opening 3 or shorter than this width B. The length LB of the fire protection housing 2 is greater than the length L of the opening 3. Finally, the width BB of the fire protection housing 2 is larger than the width B of the opening 3.

According to this dimension and configuration, the assembly of the fire protection housing 2 can take place from the underside of the cladding 1 by pushing the fire protection housing 2 through the opening 3 of the cladding 1, in such an orientation that the fire protection housing 2 with its narrow end face through the Installation opening 3 of the cladding 1 is inserted from below and moved upwards. The fire protection housing 2 can then be rotated about its longitudinal axis, so that the installation target position is achieved, which is shown in FIG Figure 1 and 2 is shown. In this desired position, the installation opening 3 is complete covered by the fire protection housing 2 so that all four boundary edges of the installation opening 3 lie within the housing components surrounded by the fire protection housing 2. In the exemplary embodiment, the fire protection housing 2 is equipped on the inside with an insert 6 made of intumescent material which leaves the installation opening 5 free. Otherwise, this insert is essentially adapted to the shape and dimensions of the fire protection housing 2.

The rectangular cladding cutout 7 of the cladding 1 cut out of the cladding 1 to form the opening 3 in the cladding 1 forms a closed surface element, wherein in the exemplary embodiment a portion of this cladding cutout 7 is an installation opening 8 for the installation of electrical components, for example a light or a loudspeaker, having. Furthermore, a plate 10 made of temperature-resistant material by means of anchors is located in the interior of the fire protection housing 2, namely on its bottom 9 at the area of the intumescent coating located there or the area of the insert 6 made of intumescent material there 11 is held. This plate 10 has a surface extension that is larger than the installation opening 8 in the cladding cutout 7. The plate 10 is preferably somewhat smaller than the bottom surface of the insert 6.

This configuration serves to ensure that in the event of a fire, i.e. when a high temperature is present in the fire protection housing 2, which causes the intumescent material to foam, the connection between the anchors 11 and the intumescent material, for example of the insert 6, is broken. In this case, the plate 10 falls under the action of gravity downward in the direction of the installation opening 8. If a fire load is present from below and possibly the device built into the installation opening 8 z. B. a lamp or a loudspeaker, burns or falls out of the housing, the opening released by the plate 10 can be closed again at least so far that the foaming material is not or hardly discharged from the housing. The intumescent material can instead be in the Compress fire protection housing 2 and form a temperature insulating section.

Furthermore, the insert 6 made of intumescent material and arranged in the fire protection housing 2 has a shape similar to the shape of the fire protection housing 2, for example in FIG Figure 1 can be seen. An air gap 12 is formed between the side walls of the insert 6 and the fire protection housing 2 and between its bottom wall and the bottom wall of the insert 6, so that an air insulation path is formed here.

Such as from Figure 3 and Figure 4 As can be seen, the formation of transversely protruding flange parts 13 which protrude into the opening 3 of the cladding 1 is provided on the mouth edge of the fire protection housing 2, which forms the base area 4 resting on the rear of the cladding 1. The cladding cutout 7 inserted into the opening 3 is fastened detachably or non-detachably to the flange parts 13 with fastening means, for example screws, which pass through it. The flange parts 13 have several Perforations or the like, which can be used for the use of fasteners, in particular screws.

In the embodiment according to Figure 3 the arrangement of flange parts 14 is also provided on the edge of the mouth, protruding transversely outward, which rest against the rear side of the cladding 1 next to the opening 3. The panel 1 can thus provide the arrangement of fastening means, in particular screws, which pass through the panel 1 and engage in perforations in the flange parts 14, so that the fire protection housing 2 is fastened to the panel 1. Instead of the formation of the flange parts 14, it can also be provided that additional fastening holes are arranged in the area of the base 4 between the flanges 13, which are used for the use of screw fastening means or the like that are guided through the paneling 1 and by means of which the fire protection housing 2 is attached to the Planking can be fastened.

The invention is not restricted to the exemplary embodiments, but is variable in many ways within the scope of the disclosure.

List of reference symbols

1. 1 planking
2. 2 fire protection housing
3. 3 opening in 1
4. 4 floor area of 2
5. 5 opening of 2
6. 6 use in 2
7. 7 cladding cut-out
8. 8 installation opening
9. 9 bottom of 2
10. 10 plate
11. 11 anchors
12. 12 air gap
13. 13 flange parts
14. 14 flange parts

Claims (5)

1. A cavity ceiling with a covering (1) forming the bottom side of the cavity ceiling and with a fire-protection housing (2) for electrical installations positioned behind the covering (1), wherein the covering (1) comprises, in the area of the arrangement of the fire-protection housing (2), an opening (3), wherein the opening (3) is rectangular with a length L and a width B, wherein the fire-protection housing (2) is dimensionally stable, consists of a one-piece sheet metal housing and forms a cuboid shape with a length LB, a width BB and a height HB, the one base face (4) of which, in the intended mounting position, abuts the rear side of the covering (1) and comprises an installation opening (5), and wherein the width BB of the fire-protection housing (2) is smaller than the length L of the opening (3), and the height HB of the fire-protection housing (2) is smaller than the width B of the opening (3), and wherein the length LB of the fire-protection housing (2) is larger than the length L of the opening (3), and the width BB of the fire-protection housing (2) is larger than the width B of the opening (3), and wherein the rectangular covering section (7) cut-out from the covering (1) for forming the opening (3) in the covering (1) is inserted into the opening (3) and in this position is attached either at the covering (1) or at the fire-protection housing (2), wherein the covering section (7) forms a closed surface element, or a portion comprises at least one installation opening (8) for the installation of electrical components.
2. The cavity ceiling with fire-protection housing according to claim 1, characterized by that the fire-protection housing (2) comprises, in its interior, a coating or an insert (6) of intumescent material that leaves the installation opening (5) open.
3. The cavity ceiling with fire-protection housing according to claim 1, characterized by that in the area of the fire-protection housing (2) that is arranged opposite to the base face (4) abutting the covering (1) and forms the bottom (9) of the fire-protection housing (2), there is attached, at the interior intumescent coating located there or in the area of the insert (6) of intumescent material located there, a plate (10) of a temperature-resistant material by means of at least one anchor (11) that has a surface area larger than the installation opening (8) in the covering section (7).
4. The cavity ceiling with fire-protection housing according to claim 2 or 3, characterized by that the insert (6) of intumescent material arranged in the fire-protection housing (2) has a similar shape as the fire-protection housing (2), wherein there is formed, between the sidewalls and the bottom wall of these parts, an air gap (12).
5. The cavity ceiling with fire-protection housing according to claim 1 to 4, characterized by that at the mouth edge of the fire-protection housing (2) that forms the base face (4) abutting the rear side of the covering (1) or is part thereof, flange portions (13) are fitted or are formed integrally therewith that protrude into the opening (3) of the covering (1), wherein the covering section (7) inserted into the opening (3) is releasably or non-releasably attached with attachment means passing through said covering section (7), to the flange portions (13), and/or that at the mouth edge of the fire-protection housing (2), transversely outwardly or inwardly projecting flange portions (14) are fitted or integrally formed that abut the rear side of the covering (1) beside the opening (3) and are attached to the covering (1) by means of attachment means passing through the covering (1).

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