EP0331690A1

EP0331690A1 - Ceiling facing

Info

Publication number: EP0331690A1
Application number: EP88907303A
Authority: EP
Inventors: Karl-Heinz Hartleif
Original assignee: Hartleif Metalldecken GmbH
Current assignee: Hartleif Metalldecken GmbH
Priority date: 1987-08-18
Filing date: 1988-08-17
Publication date: 1989-09-13
Anticipated expiration: 2008-08-17
Also published as: WO1989001552A1; EP0331690B1; EP0332672B1; DE3870441D1; EP0332672A1; JPH02500608A; DE3866348D1; DE8711244U1; WO1989001551A1; JPH02500531A; US5410853A; KR890701854A; KR890701855A; US4944129A

Abstract

Die Deckenverkleidung aus Metall besteht aus einem Trägerraster (2, 3) und Kassetten (6), wobei das Trägerraster Längsstreben (2) und Querstreben (3) umfasst, welche mit Vorsprüngen (26) versehen sind, auf welchen die Kassetten (6) dichtend aufliegen. Um eine sowohl den optischen Anforderungen als auch den Anforderungen an die Dichtigkeit entsprechende Zuordnung der Kassetten (6) zu ermöglichen, ist erfindungsgemäss vorgesehen, dass die Vorsprünge (26) in vertikaler Richtung erstreckende Stege (34) aufweisen, auf welchen die Kassetten (6) mit deren Stufenfalz (88) aufliegen. Weiterhin sind Dichtungen (44) vorgesehen, welche an den Vorsprüngen (26) angebracht sind und im montierten Zustand gegen die Kassetten (6) anliegen. Erfindungsgemäss wird somit eine sichere mechanische Zuordnung zu den Kassetten (6) gewährleistet, weiterhin ist sichergestellt, dass die Dichtungen (44) eine ausreichende Dichtfunktion ausüben. Abstract A metallic ceiling facing is composed of a bearing grid (2, 3) and cassettes (6). The bearing grid has longitudinal struts (2) and cross struts (3) provided with projections (26) upon which sealingly lie the cassettes (6). On order to obtain a cassette (6) arrangement that satisfies esthetic requirements and ensures the tightness required, the projections (26) have vertically projecting bars (34) upon which rests the stepped seam (88) of the cassettes (6). Seals (44) are further mounted on the projections (26) and bear against the cassettes (6) in mounting position. A safe mechanical arrangement in relation to the cassettes (6) is thus ensured, as well as a sufficient tightness of the seals (44).The metal ceiling covering consists of a support grid (2, 3) and cassettes (6), the support grid comprising longitudinal struts (2) and cross struts (3) which are provided with projections (26) on which the cassettes (6) seal lie on. In order to enable the cassettes (6) to be assigned in accordance with both the optical requirements and the requirements for tightness, the invention provides that the projections (26) have webs (34) extending in the vertical direction, on which the cassettes (6) rest with their step fold (88). Seals (44) are also provided, which are attached to the projections (26) and bear against the cassettes (6) in the assembled state. According to the invention, a reliable mechanical association with the cassettes (6) is thus ensured, and it is also ensured that the seals (44) perform an adequate sealing function. Abstract A metallic ceiling facing is composed of a bearing grid (2, 3) and cassettes (6). The bearing grid has longitudinal struts (2) and cross struts (3) provided with projections (26) upon which sealingly lie the cassettes (6). On order to obtain a cassette (6) arrangement that satisfies esthetic requirements and ensures the tightness required, the projections (26) have vertically projecting bars (34) upon which rests the stepped seam (88) of the cassettes (6). Seals (44) are further mounted on the projections (26) and bear against the cassettes (6) in mounting position. A safe mechanical arrangement in relation to the cassettes (6) is thus ensured, as well as a sufficient tightness of the seals (44).

Description

Ceiling cladding

description

The invention relates to a ceiling cladding made of metal, consisting of a support grid and of cassettes arranged in the grid fields of the support grid, the support grid being made up of longitudinal struts and transverse struts connected to them, and each longitudinal strut and each cross strut each extending in the longitudinal direction and on both sides at its lower ends arranged, extending substantially horizontally extending projections, on the top of which seals are arranged, on which the cassettes lie sealingly.

In the case of gas-tight ceiling claddings, such as are used in particular in clinical areas, in the laboratory area or in production rooms designed as clean rooms, it is necessary for the support grid to be designed in such a way that the cassettes are in a completely sealing arrangement on the support grid, but at the same time are easy to To be assembled or disassembled. Furthermore, such ceiling cladding must meet high visual requirements, ie an exact arrangement of the cassettes must be possible, particularly in the case of very large ceiling cladding. From DE-PS 26 24 956 a false ceiling is known, in which the seals are applied to the projections of the struts so that the cassettes lie directly on the seals. This has the disadvantage that the seals are fully loaded by the weight of the cassettes and are therefore pressed together strongly. Due to the elasticity of the seals, the uniformity of the support of the cassettes cannot be guaranteed to the extent that the ceiling cladding fully meets the visual requirements. Furthermore, due to the direct support, the all-round sealing of the cassettes is not guaranteed.

The invention has for its object to provide a ceiling cladding of the type mentioned which, with a simple construction and simple assembly and disassembly possibility of the cassettes, enables stable, optically appealing and gas-tight cladding even with variable grid dimensions.

According to the invention, the object is achieved in that a web is formed on the top of the projection and extends along the projection and upwards, on which the cassette rests.

The ceiling covering according to the invention is distinguished by a number of considerable advantages. Thus, according to the invention, it is possible to store the respective cassettes directly on webs of the carrier grid, so that on the one hand a uniform and secure storage of the cassettes is ensured and on the other hand always an exact assignment that also meets the optical requirements can be achieved between the cassettes and the support grid. Another essential advantage of the invention is that the weight of the cassettes is not, as is known from the prior art, rests directly on the seals, but is carried by the webs, while the seals are only in contact with corresponding surfaces of the cassettes in order to ensure a gas-tight seal. Damage to the seals is thus avoided. Furthermore, since the cassettes always lie completely on the respective webs, it is also ensured that the seals engage in the entire circumference of the cassettes, so that a gas-tight seal is ensured.

In a preferred embodiment of the invention, the seal is arranged between the web and the side wall of the longitudinal strut or the cross strut. The seal is thus protected against damage even when the cassette is removed and is not visible, particularly when the cassette is inserted, so that the overall visual impression is not impaired.

In order to achieve a good and uniform sealing effect, it can prove to be advantageous to design the seal in a hose-like manner and to provide it with a height in the unloaded state which is greater than the height of the web. The seal is thus deformed to a predetermined extent by the cassette, the elasticity of the seal resulting in sufficient abutment against the surface of the cassette to ensure the sealing effect.

According to the invention, the seal can also have a rectangular cross section and be designed as a full profile, it proving to be advantageous if the seal material as a whole has sufficient elasticity.

In order to securely connect the seal to the projection, it preferably has a flat support. surface which can be glued to the projection, for example. This flat contact surface can be provided both in the case of a tubular seal and in the case of a rectangular seal.

In order to ensure a gas-tight seal, the seal is preferably made from an elastic material with a closed surface, for example from a closed-cell foam or the like.

In a further development of the invention, a further web can be arranged parallel to the web between the web and the wall of the longitudinal strut or the cross strut. This further web serves to form a U-shaped channel cross section, in which the seal is inserted.

This design measure prevents spring elements which are arranged on the longitudinal web and on the cross web from damaging the seal.

Furthermore, it can prove to be favorable that the cassette has a circumferential step fold on its outer lower edge region, the cassette resting with the horizontal surface of the step fold on the projections or the webs. The formation of the step fold makes it possible to arrange the lower surface of the cassette flush with the lower surfaces of the longitudinal struts and transverse struts.

In order to ensure a uniform support of the cassettes and a uniform sealing effect, it can be provided that the lateral projections of the longitudinal struts and the lateral projections of the transverse struts are each designed identically. In order to keep the cassettes in their inserted position, it proves to be advantageous that the cassettes are held in their position on the longitudinal struts and / or on the transverse struts. In a preferred embodiment, the springs are designed as leaf springs, the ends of these leaf springs being held in opposing grooves formed on the side walls of the longitudinal or transverse struts. With this spring configuration, the cassettes can be inserted or removed in a particularly simple manner, and jamming preventing the cassette from being dismantled can be excluded in a safe manner.

Furthermore, it can prove to be advantageous that the grooves on the one hand from the respective side wall and a strip running parallel to it and running downwards from the upper end of the side wall and on the other hand a strip formed on the upper side of the projection and running upwards parallel to the side wall are formed. With this configuration, a secure mounting and fixing of the spring elements is guaranteed. The spring elements thus bring about a firm support of the cassettes on the webs of the projections, so that the cassettes lie precisely on the optical aspect and are pressed into contact with the seals with regard to the required sealing effect.

In order to further improve the mounting and clamping of the cassettes on the webs, it can be provided according to the invention that the springs have an angled section between the two ends, one leg of which essentially runs vertically, on the side surface of the case ¬ set resiliently supported and runs up to about the height of the upper edge of the cassette, and whose other leg runs above the upper edge of the cassette and angled outwardly with respect to the side wall of the strut is. It can furthermore prove to be advantageous if one leg is adjoined by a leg which preferably extends in a straight line towards the lower groove and on the other leg a leg which preferably extends in a straight line to the upper groove. Furthermore, a spring end section, which runs parallel to the side wall of the strut, can be connected to the legs of the tongue that extend toward the grooves. All of these embodiments improve the pressing of the cassettes against the webs and ensure adequate sealing. Since the size of the grid fields or the dimensioning of the support grid can often not be adapted exactly to the size of the ceiling to be covered, it is provided according to the invention that the grid fields at the transition area to a wall are delimited by a wall connecting strut. This configuration gives the possibility of also bringing irregular wall shapes into a sealing connection to the ceiling cladding. It may also be advantageous for the wall connection strip to have a horizontal projection extending in its longitudinal direction, on the upper side of which a seal which can be brought into contact with the cassette is arranged. This configuration ensures that a gas-tight seal is also present in the transition area to the wall.

In a further embodiment of the wall end strut it can be provided that a second projection parallel to this is arranged above the first projection, below which a horizontal region of the cassette can be inserted. The cassette is thus guided and held in a U-shaped groove, so that the cassette cannot be moved or unintentionally released.

For secure sealing in the transition area to the wall it can further be provided that the seal is U-shaped Has cross section and is mounted on the second projection and comprises at least one sealing lip pointing in the direction of the first projection. When installed, the sealing lip is in contact with the horizontal area of the cassette and enables a gas-tight seal. Since the sealing lip extends into the U-shaped area between the first and the second projection, a sufficient pretensioning force of the seal is ensured at the same time.

In a further particularly advantageous embodiment of the invention, it is provided that the cassette is provided with internally mounted internals, which can be designed, for example, in the form of a lamp or an air supply / air discharge device. This proves to be advantageous because no additional leak points are possible due to additional internals or attachments. In the following the invention is described with reference to exemplary embodiments in connection with the drawing. It shows:

1 is a bottom view of part of the support grid according to the invention,

2 is a partial sectional view through a cross strut of the support grid along the line II / I of FIG. 1, with inserted cassettes,

3 shows a sectional view along the line III / III according to FIG. 1 through a longitudinal strut of the support grid with an inserted cassette,

4 shows a side view of a cross strut according to FIG. 1, partly in section, 5 is a side view of a longitudinal strut according to FIG. 1,

6 shows a sectional view of a further exemplary embodiment of a longitudinal strut, similar to FIG. 3,

7 shows a sectional view through a further exemplary embodiment of a cross strut, similar to FIG. 2 _f

8 is a side sectional view of a first exemplary embodiment of a wall end strut,

9 is a view similar to FIG. 8 of a further exemplary embodiment of a wall end strut,

10 is a sectional view through a cassette with an installation in the form of a tube,

11 is a sectional view through a cassette with an installation in the form of a lamp,

Fig. 12 is a sectional view through a cassette with an installation in the form of an air box and

13 shows a perspective bottom view of a ceiling cladding according to the invention provided with built-in units and cassettes.

The ceiling covering according to the invention essentially consists of horizontally arranged, parallel parallel longitudinal struts 2, cross struts 4, which are arranged between the longitudinal struts 2 and are each fastened with their ends to the longitudinal struts, and cassettes 6 _t which in the from the longitudinal struts 2 and the cross struts 4 are carried. As can be seen from FIG. 3, the longitudinal struts 2 are above themselves from the top 12 of the longitudinal struts 2 supporting straps 14 extending at the top are fastened to supports 8, which in turn are height-adjustable, for example by means of threaded rods 16, relative to the ceiling, not shown. The support straps 14 of the longitudinal struts 2 are angled at their upper end, so that the longitudinal struts can be suspended from the supports 8 via the horizontally extending angle leg 18 of the support strap 14. In addition, the support tabs 14 are secured to the supports 8 by means of screws 20.

The longitudinal struts 2 and the cross struts 4 are designed as aluminum profiles. The cassettes 6 carried by the longitudinal struts 2 and the cross struts 4 are made from electrolytically galvanized sheet steel, the visible sides of both the cassettes 6 and the longitudinal struts 2 and the cross struts 4 being coated with thermally hardened paint, for example in the color RAL 9010 are.

The shape of the longitudinal struts 2 can be seen in particular from FIG. 3. The longitudinal struts 2 are essentially designed as a rectangular box section, the upper side 12 of the box section being largely open so that the interior of the box section is accessible. Continuous, laterally projecting supports 26 are formed on the two longitudinal sides 22, 24 of the box section in the longitudinal direction of the longitudinal struts. These supports 26 are also designed in the manner of a box profile, with the underside 28 of the supports 26 lying in one plane with the underside 30 of the box-profile-like longitudinal strut 2.

On the upward-facing upper side 32 of each support 26, three vertical webs 34, 36, 38 extending in the longitudinal direction of the longitudinal strut 2 are formed, the outer web 34 being an extension of the side wall 40 of the box-shaped support 26 dar- represents, the web 38 is arranged near the long side 22 of the longitudinal strut 2 and defines a groove 42 therewith and the web 36 is arranged between the web 34 and the web 38.

A sealing strip 44 is inserted between the web 34 and the web 36, which can be made of rubber, for example, extends over the entire length of the longitudinal strut and, in the non-compressed state, projects slightly beyond the upper edges of the webs 34, 36.

On the upper area of the two long sides 22, 24, a web 46 is formed, which runs parallel to the long sides and over the entire length of the long sides and defines a groove 48 between them and the adjacent side wall 22 and 24, respectively . The mutually opposite grooves 42, 48 serve to receive springs 50 to be described in more detail below.

In the longitudinal sides 22, 24 of the longitudinal struts 2, as can be seen from FIG. 5, through bores 52 for receiving screws 54 are provided approximately halfway up under a predetermined grid spacing of, for example, 60 cm, which are used for the non-positive fastening of the cross struts 4 serve the longitudinal struts 2. The total width of the longitudinal struts 2, including their supports 26, can be approximately 10 cm, with a height of approximately 7.2 cm.

For the transverse stiffening of the longitudinal struts, galvanized grate angles with additional diagonal struts are provided as thrust beams at a distance of, for example, 100 cm.

The structure of the cross struts 4 can be seen in particular from FIG. 2. The cross struts 4 are also designed as an aluminum profile and comprise an upright ledge 80, along the lower end of which on both sides in the longitudinal direction. device of the bar 80 extending supports 56 are formed, which extend to both sides of the line 80 and whose undersides 58 form the underside of the cross struts. The supports 56 have the same cross-section as the supports 26 of the longitudinal struts 2 and are therefore box-shaped with side walls 70 and tops 62, from which longitudinal webs 64, 66, 68 extend upwards, between the webs 64 , 66 sealing strips 74 are arranged and 80 grooves 72 are formed between the webs 68 and the adjacent side surface of the strip.

Along the upper end of the strip 80, in the same way as in the case of the longitudinal struts 2, downwardly extending webs 76 are formed which define grooves 78 between themselves and the adjacent side surfaces of the strip 80. The opposing grooves 72, 78 serve, as in the case of the longitudinal struts 2, to receive the ends of springs 50. Along the upper edge of the cross struts 4 a stiffening bar 60 is formed which extends at right angles to the level of the bar 80.

The strip 80 has a thickening 82 extending approximately in the center in the longitudinal direction, in which a threaded bore 84 extending in the longitudinal direction of the cross strut 4 is formed in the center. 3, the cross struts 4 are provided at their lower end edges with a step-shaped, rectangular recess 86 which is dimensioned such that the cross struts 4, when attached to the longitudinal struts 2, have the upper, horizontal surface of the recess 86 rest on the supports 26 and at the same time rest with their end face 87 on the outer sides of the webs 46 of the longitudinal struts 2. In the case of the exemplary embodiment described here, the width of the cross struts 4 can be approximately 4 cm and the height of the cross struts 4 corresponds the height of the longitudinal struts 2 and is thus 7.2 cm.

To fasten the cross struts 4 to the longitudinal struts 2, the screws 54 are passed from the inside of the longitudinal struts 2 through the through bores 52 of the long sides 22, 24 of the longitudinal struts 2 and screwed into the threaded bores 84 of the cross struts 4 opposite the through bores 52.

The dimensions of the cassettes 6 are somewhat smaller than the grid dimensions defined by the long sides 22, 24 of the longitudinal struts and the outer sides of the strip 80 of the cross struts, but larger than the grid dimensions defined by the side walls 40, 70 of the supports 26, 56 . Along their outer sides are provided with the cartridge 6 _r INEM circumferential rabbet 88 below. When the cassettes 6 are inserted into the grid fields 10 defined by the longitudinal struts 2 and the cross struts 4, they lie with the horizontal surfaces 90 of the step fold 88 in a sealing manner on the sealing strips 44, 74 carried by the supports 26, 56 . The height of the step fold 88 is designed so that the undersides 92 are flush with the undersides of the longitudinal struts 2 and the cross struts 4.

The springs 50 carried on the longitudinal struts 2 and the cross struts 4 are provided to fix the position of the cassettes 6. The springs 50 each have a leg running parallel to the longitudinal sides 22, 24 or the strip 80 at their two ends, the lower leg of the spring 50 in the groove 42 or 72 and the upper leg the spring 50 is guided in the upper groove 48 or 78. In its central region, a vertical leg 94 is formed on the springs 50, which bears against the side wall of the cassette 6 in the region of its upper edge, and extends up to the region of the upper edge 96 of the cassette. stretches and lies under tension on the cassette. This vertical leg of the spring 50 is followed by a short leg 98, which extends obliquely upwards outwards. A straight leg 100 leads from the outer end of this leg 98 to the upper end region of the tongue 50, which is guided in the groove 48 and 78, respectively. A straight leg, further leg 102 of the tongue 50 leads from the lower end of the vertical leg 94 to the lower end section of the spring 50 guided in the groove 42 or 72.

In the case of the exemplary embodiment described here, six springs 50 are distributed on the longitudinal struts 2 and the cross struts 4 for each cassette 6. The springs 50 can be inserted into the guide grooves in a simple manner by compressing the legs 100, 102 at the desired location. If required, the springs 50 can also be displaced within the guide grooves. When the cassettes 6 are inserted into the grid fields 10, the lower edges of the cassettes 6 run onto the legs 100 of the springs 50 and push them to the side. As soon as the cassettes 6 have reached their desired position shown in the figures, the springs snap with their legs 98, 100 to the outside over the upper edge of the cassettes 6 while the vertical legs 94 abut against the side surfaces of the cassette 6. In this way the cassettes 6 are held securely in their desired position.

FIG. 6 shows a sectional view, similar to FIG. 3, through a longitudinal strut of the support grid according to the invention, which essentially corresponds in structure to the longitudinal strut shown in FIG. 3. The same parts have been given the same reference numbers. The longitudinal strut shown in FIG. 6 has, on the projections 26, webs 34 which extend upwards and on which, as shown, the cassettes 6 with a horizontal surface of the Step fold 88 rest. It is thus ensured that the cassettes are always in contact with the webs 34, so that an exact assignment and alignment of the arrangement of the undersides 30 of the longitudinal struts and the undersides of the cassettes 6 is ensured. In the intermediate space formed between the longitudinal side 24 of the longitudinal strut and the web 34, a seal 44 is arranged, which has a flat lower contact surface 104 which can be connected to a horizontal region of the projection 26. For example by means of an adhesive connection. The seal 34 is essentially tubular and has a height in the unloaded state which is greater than the corresponding height of the web 34. In this way it is ensured that the seal 44 when the cassettes 6 are placed on is always compressed to a predetermined extent.

The longitudinal strut shown in FIG. 6 is designed in the form of a hollow profile and has an essentially rectangular, closed conduit channel 124, which is formed by the underside 30, the longitudinal sides 24 and a horizontally extending separating web 126. The conduit 124 is thus self-contained and sealed against a tubular cross-sectional area 128 arranged above it. The tubular cross-sectional area essentially has a U-shaped configuration, so that the carrying tab 14 can be inserted into it, as shown in FIG. 6.

The conduit 124 can be used for the passage of electrical cables or pipes, for example for a sprinkler system. Due to its sealing by means of the separating web 126, it is also possible to attach 2 attachments to the underside 30 of the longitudinal strut, for example dividing walls, additional lights or the like, without this affecting the tightness of the ceiling cladding. would be done.

»

In the exemplary embodiment shown in FIG. 6, the carrying strap 14 is connected to a hanger 130, it being possible for the connection to be made by means of bolts or screws 132, which are only indicated schematically.

On the longitudinal strut, as in the exemplary embodiment shown in FIG. 3, upper and lower grooves 48, 42 are formed which serve to hold a spring 50 or a spring element. An embodiment of such a spring element 50 is shown on the right half of FIG. 6.

In order to ensure secure attachment to the support bracket 14, it has a lower transverse region, from the outer upper edge view of which retaining tabs 136 extend upwards, which can be introduced into U-shaped grooves which are formed by edges 138 of the top sides 12 . Thus, loosening of the support bracket 14 is reliably prevented even when vibrations occur.

A connection between the longitudinal strut 2 and a transverse strut 4 can take place by means of an angle 140, which is formed in a longitudinal groove 142 on the longitudinal side 24 of the longitudinal strut 2. The angle 140 can be screwed to the longitudinal strut 2, for example.

FIG. 7 shows an embodiment, similar to FIG. 2, of a cross strut according to the invention, which corresponds with regard to its lateral structure to the longitudinal strut shown in FIG. 6. In this cross strut, too, the webs 64 are designed in such a way that the cassettes with their step fold 88 rest directly on the webs 64, but not on the seals 44. The seal 44 is the same Formed in the same way as in the exemplary embodiment shown in FIG. 6. Likewise, the upper and lower grooves 78, 72 for receiving the spring elements 50 are formed in the same way. ^"

The cross member shown in Fig. 7 is lax means of a Trag¬ 14 'can be suspended, which at its lower end a support member 144 having a substantially u ^"shaped cross-section, by means of which a Umgrei¬ the upper portion fen of the transverse strut possible 7, the free ends of the holding element 144 are bent inwards in order to engage behind the webs 76. Since both the spring 50 and the support straps 14 'each extend only over a limited length extend the cross strut, there is no undesirable interaction between them.

8 and 9 show exemplary embodiments of a wall end strut according to the invention, by means of which a wall connection of a cassette 6 can be designed to suit the local conditions. The cassette 6 is provided with a horizontal region 116, which can be designed, for example, in the form of part of the underside of the cassette 6.

The wall connection strut 106 has a first horizontal projection 110, on which the horizontal region 116 of the cassette 6 can be placed. This configuration ensures secure storage of the cassette 6. Essentially parallel to the first projection 110, a second projection 114 is formed in one piece with the wall connection strut 106, the free end of which is arranged a seal 112 which engages around the second projection 114 and has at least one sealing lip 118 on its underside , which is biased against the first projection 110 is. When the horizontal region 116 is inserted, a seal is thus made in a reliable manner.

As shown in FIG. 9, the wall connection strut 106 can be designed in the form of an angle profile which can be screwed to a wall 108. However, it is also possible to design the wall connection strut 106 in the form of a double-angle profile, as shown in FIG. 8, in order to form a shadow groove 146 in this way.

10 shows an embodiment of an installation for a cassette 6. The installation is in the form of a schematically shown pipe 148, which can be used, for example, for a sprinkler system. In a recess of the cassette 6, an annular seal 149 is inserted, which comprises an annular sealing lip 150 which is in contact with the outer surface of the tube 148 and thus represents a reliable seal. The tube 148 can either be attached to the cassette 6 or to a ceiling arranged above it.

FIG. 11 shows a further exemplary embodiment of an installation of a cassette 6, which is designed in the form of a lamp 120 which is only shown schematically. The lamp 120 is firmly connected to the cassette 6 and has a housing which is closed toward the top. A gas-tight seal is provided between the lamp 120 and the cassette 6 via a seal 152. The lamp 120 is installed or removed together with the cassette 6.

FIG. 12 shows a further exemplary embodiment of an installation of a cassette, the installation being designed in the form of an air supply or air discharge device 122. A box 158 of the air installation 122 is via seals 156, which are tightly connected to the cassette 6, for Sealed top of the cassette, the seal 156 also serve to hold air nozzles 154. With this embodiment it is also possible to firmly connect the air installation 122 to the cassette.

13 shows a perspective view from below of a ceiling covering according to the invention, cassettes 6 being inserted between the longitudinal struts 2 and the cross struts 4, some of which are provided with light fixtures 120 or air fixtures 122.

The invention is not limited to the exemplary embodiments shown, but there are many possible modifications within the scope of the invention.

Claims

Ceiling covering patent claims

1. metal ceiling covering, consisting of a support grid and cassettes (6) arranged in the grid fields (10) of the support grid, the support grid being constructed from longitudinal struts (2) and transverse struts (4) connected to them and wherein each longitudinal strut (2) and each transverse strut (4) has projections (26, 56) which extend in their longitudinal direction and which are arranged on both sides at their lower ends and extend essentially horizontally, with seals (44, 74) are arranged, on which the cassettes (6) lie in a sealing manner, characterized in that a web (34, 64) extending upwards along the projection (26, 56) on the top of the projection (26, 56) is formed on which the cassette (6) rests.

2. Ceiling cladding according to claim 1, characterized in that the seal (44, 74) is arranged between the web (34, 64) and the side wall of the longitudinal strut (2) or the cross strut (4).

3. Ceiling covering according to one of claims 1 or 2, characterized in that the seal (44) is tubular and in the unloaded State has a height that is greater than the height of the web (34, 64).

4. Ceiling cladding according to claim 3, characterized in that the seal (44) has a flat support surface (104) which can be connected to the projection (26, 56).

5. Ceiling cladding according to claim 1 or 2, characterized in that the seal (44) has a rectangular cross section and is designed as a full profile.

6. Ceiling covering according to one of claims 1 to 5, da¬ by g e k e n n z e i c h n e t that the seal (44) is made of an elastic material with a closed surface.

7. ceiling covering according to one of claims 1 to 6, da¬ by g, .e indicates that parallel to the web (34, 64) between this and the wall (24) of the longitudinal strut (2) or the cross strut (4) further web (36, 66) is arranged.

8. ceiling covering according to one of claims 1 to 7, da¬ characterized in that the cassette (6) has at its outer lower edge region a circumferential step fold (88) and with a horizontal surface of the step fold on the projections (26, 56) so rests that the undersides of the cassette (6), the longitudinal struts (2) and the cross struts (4) are arranged in one plane.

9. ceiling covering according to one of claims 1 to 8, da¬ characterized in that the lateral projections (20) of the longitudinal struts (2) and the lateral projections of the cross struts (4) are each equally forms are.

10. Ceiling covering according to one of claims 1 to 9, characterized in that on the longitudinal struts (2) and / or on the cross struts (4) the cassettes (6) held in their position fixing spring elements (50) are.

11. Ceiling covering according to claim 10, characterized gekenn¬ characterized in that the spring elements (50) are designed as Blatt¬ springs, the ends of these Blatt¬ springs formed in on the side walls of the longitudinal or transverse struts (2, 4) , opposite grooves (42, 48 ', 72, 78) are held.

12. Ceiling cladding according to claim 11, characterized gekenn¬ characterized in that the grooves (42, 48 ', -72, 78) from the respective side wall and a parallel to this, extending from the upper end of the side wall down strip ( 46, 76), on the one hand, and a strip (38, 68), which is formed on the top (32, 62) of the projection (26, 56) and runs upwards parallel to the side wall, are formed on the other.

13. Ceiling covering according to claim 11 or 12, characterized in that the spring elements (50) have an angled section between the two ends, one leg (94) of which runs essentially vertically, on the side surface of the cassette ( 6) is resiliently supported and extends approximately to the height of the upper edge (96) of the cassette (6), and its other leg (98) extends above the upper edge (96) of the cassette (6) and is inclined with respect to the side wall of the strut is angled upwards outside.

14. Ceiling covering according to claim 13, characterized gekenn¬ characterized in that on one leg (94) a preferably straight to the lower groove (42, 72) extending leg (102) and on the other leg (98) a preferably Legs (100) extending straight to the upper groove (48, 78) adjoins.

15. ceiling covering according to claim 14, characterized gekenn¬ characterized in that each extending to the grooves extending legs (100, 102) of the spring element (50) connects a spring end portion, which is parallel to the side wall of the strut (2, 4th ) runs.

16. Ceiling covering according to one of claims 1 to 15, thereby g e k e n n z e i c h n e t that the Rasterfeider

(10) are delimited at the transition area to a wall (108) by a wall connection strut (106).

17. Ceiling covering according to claim 16, characterized gekenn¬ characterized in that the wall connection strut (106) has a longitudinally extending, horizontal projection (110), on the top of which a cassette (6) can be brought into contact seal (112) is arranged.

18. Ceiling cladding according to claim 17, characterized in that a second projection (114) parallel to this is arranged above the first projection (110), under which a horizontal region (116) of the cassette (6) can be inserted.

19. Ceiling covering according to claim 18, characterized gekenn¬ characterized in that the seal (112) has a U-shaped cross section and is mounted on the second projection (114) and at least one in the direction of the first projection (110) pointing sealing lip (118).

20. Ceiling cladding according to one of claims 1 to 19, by means of the fact that the cassette (6) is provided with internally mounted internals.

21. Ceiling covering according to claim 20, characterized in that the internals are designed in the form of a luminaire (120) or an air supply / air discharge device (122).