DK150353B

DK150353B - Ceiling element

Info

Publication number: DK150353B
Application number: DK515883A
Authority: DK
Inventors: Jesper Achton Friis
Original assignee: Rockwool Int
Priority date: 1983-11-11
Filing date: 1983-11-11
Publication date: 1987-02-09
Also published as: FI844422A0; SE8405623L; NO844437L; DK150353C; JPS60115756A; SE8405623D0; DK515883D0; KR850004063A; FI844422L; DK515883A

Abstract

Ceiling element for hanging at the ends between supporting rails and including a surface (2) whose side edges (3) are bent upwards to form side flanges, between which insulation material in the form of mineral wool is positioned, and where the side flanges have a profile that is designed to hold together adjacent pieces. So that the adjacent elements in a ceiling are able to reinforce one another, without consequently making it impossible to remove any one element, and to achieve high resistance to smoke gasses travelling through the air in the event of a fire, the side flanges' free edge (4, 5) is bent to form a channel open on the bottom, in that the one edge (5) is bent inwards and the other (4) outwards, and approximately in the middle of the one flange a depression (6) running along the length of the side flange and a corresponding protrusion (7) on the other side flange.<IMAGE>

Description

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Den foreliggende opfindelse angår et loftelement til ophængning ved enderne mellem bæreskinner og omfattende en plade, hvis sidekanter er bukket opefter til dannelse af sideflanger, mellem hvilke der er anbragt isoleringsmateriale i form af mineraluld, og hvor sideflangerne har en profilering, der er indrettet til at sammenholde op til hinanden stødende elementer.The present invention relates to a ceiling element for hanging at the ends between support rails and comprising a plate whose side edges are bent upwards to form side flanges, between which insulating material is formed in the form of mineral wool, and wherein the side flanges have a profile adapted to compare adjacent elements.

Sådanne loftelementer anvendes som forsænkede lofter, der dels skal skjule en oven over beliggende, bærende konstruktion, dels skal beskytte denne mod varme, dersom der opstår brand i rummet under den bærende konstruktion. Kendte udformninger er ikke tilfredsstillende med hensyn til tæthed mod gennemtrængning .afrøg i samlingerne, hvor elementerne støder op til hinanden, og de op til hinanden stødende elementer yder ikke en sådan støtte for hinanden, at en lokal nedbøjning, hvor et mellemrum åbner sig, kan undgås.Such ceiling elements are used as recessed ceilings, which must partly obscure an overlying supporting structure and partly protect it from heat if there is a fire in the room under the supporting structure. Known configurations are not satisfactory in terms of tightness against penetration in the joints where the elements are adjacent to each other and the adjacent elements do not support each other such that a local deflection where a gap opens can avoided.

Ved en fra beskrivelsen til USA-patent nr. 4.114.338 kendt tagpanelkonstruktion er de opbukkede kanter forsynet med en profilering i form af en ombukning, i hvilken en tilsvarende ombukning på et naboelement er i indgreb. Ved denne udformning kan der mellem tilstødende elementer kun overføres kræfter vinkelret på panelerne i den ene retning, men ikke i den anden. Der kan derfor ske udbøjninger af nogle af panelerne, således at den samlede flade, som panelerne danner, ikke er plan.In a roof panel construction known from the specification of US Patent No. 4,114,338, the curved edges are provided with a profiling in the form of a folding in which a corresponding folding on a neighboring element is engaged. In this embodiment, between adjacent elements only forces perpendicular to the panels can be transferred in one direction, but not in the other. Therefore, deflections of some of the panels may occur, so that the total surface formed by the panels is not flat.

Pra beskrivelsen til britisk patent nr. 945.971 kendes der loftspaneler, hvor et fremspring *i den opbukkede sidekant griber ind i en tilsvarende fordybning i sidekanten på et naboelement. Et sådant arrangement fordrer, at elementerne presses tæt sammen, men dette forhindrer, at enkelte elementer midt i den sammenbyggede flade kan udtages uden at der er adgang til panelernes overside. Samlingen yder ikke nogen særlig tæthed over for gennemtrængning af varme røggasser.From the specification of British Patent No. 945,971, ceiling panels are known in which a projection * in the curved side edge engages in a corresponding depression in the side edge of a neighboring element. Such an arrangement requires the elements to be pressed tightly together, but this prevents individual elements in the middle of the assembled surface from being removed without access to the upper side of the panels. The assembly does not provide any special tightness against the penetration of hot flue gases.

Formålet med den foreliggende opfindelse er at undgå de nævnte ulemper uden at elementerne dog sammenføjes så uadskilleligt, at det ikke er muligt at nedtage et vilkårligt element i et færdigt opsat loft.The object of the present invention is to avoid the aforementioned disadvantages without, however, insulating the elements so inseparably that it is not possible to remove any element in a finished ceiling.

Loftelementet ifølge opfindelsen er ejendommeligt ved, at sideflangernes fri kant er ombukket til dannelse af en nedefter 2 150353 åben rende, idet den ene kant er bukket indefter og den anden udefter, samt at der tilnærmelsesvis midt på den ene sideflange er en på langs forløbende fordybning og på den anden sideflange et tilsvarende fremspring.The ceiling element according to the invention is characterized in that the free edge of the side flanges is bent to form a downwardly opening gutter, one edge being bent inwards and the other outwards, and that approximately in the middle of one side flange is a longitudinal depression. and on the other side flange a corresponding projection.

De ombukkede fri .kanter af sideflangerne kan ved opsætningen af elementerne bringes i indgreb med modsvarende ombukkede kanter på tilstødende elementer, hvorved fremspringene samtidig vil gribe ind i fordybningen i det tilstødende element. Elementerne vil derved opnå en sådan sammenlåsning, at tilstødende elementer ikke kanforskydes i højderetningen i forhold til hinanden. De ind i hinanden gribende ombukninger danner en labyrint, gennem hvilken varme røggasser under brand kun har ringe mulighed for at trænge igennem. Et loft fremstillet af stålplade vil derfor udvise en stor modstand mod brand.The folded free edges of the lateral flanges may be engaged by the set-up of the elements with corresponding folded edges of adjacent elements, whereby the projections will simultaneously engage the recess of the adjacent element. The elements will thereby achieve such interlocking that adjacent elements cannot be displaced in the vertical direction relative to each other. The interlocking bends form a maze through which hot flue gases under fire have little opportunity to penetrate. A ceiling made of steel sheet will therefore exhibit a great resistance to fire.

Fortrinsvis er ifølge opfindelsen den indefter bukkede kant af sideflangen udformet med en sådan tykkelse, at den ved indsættelse i en tilsvarende, udefter bukket kant i et tilstødende, identisk element passer stramt i denne. Denne udformning forøger tætheden over for røggasser og forøger låsevirkningen mellem tilstødende elementer uden væsentligt at vanskeliggøre samlingen eller adskillelsen.Preferably, according to the invention, the inner curved edge of the side flange is formed to such a thickness that it fits tightly therein by insertion into a corresponding, further curved edge of an adjacent identical element. This design increases the density against flue gases and increases the locking action between adjacent elements without significantly impeding the assembly or separation.

For yderligere at forøge modstanden mod gennembrænding er ifølge opfindelsen den fri kant af sideflangerne placeret under overfladen af mineraluldsisoleringen. Mineralulden vil derved diffusere de eventuelle røggasser, som måtte trænge gennem sprækkerne mellem tilstødende elementer, og som derved vil anrette mindre skade i rummet over loftelementerne.In order to further increase the resistance to burnout, according to the invention, the free edge of the side flanges is located below the surface of the mineral wool insulation. The mineral wool will thereby diffuse any flue gases which may pass through the crevices between adjacent elements, thereby causing minor damage to the space above the ceiling elements.

Endelig kan ifølge opfindelsen fremspringene være udformet som med afstand anbragte, tilnærmelsesvis runde fremspring. Denne udformning letter adskillelsen af elementerne ved udtagning af et element midt i en loftsbeklædning. Fremspringenes låsevirkning kan ophæves ved at stikke en plade af samme tykkelse som højden af fremspringene ind i sprækken mellem to elementer og i mellemrummet mellem to fremspring.Finally, according to the invention, the projections may be formed as spaced, approximately round projections. This design facilitates the separation of the elements by removing an element in the middle of a ceiling covering. The locking action of the projections can be canceled by inserting a plate of the same thickness as the height of the projections into the gap between two elements and in the space between two projections.

Opfindelsen skal i det følgende beskrives nærmere under henvisning til et på tegningen vist udførelseseksempel.The invention will now be described in more detail with reference to an exemplary embodiment shown in the drawing.

Tegningen viser et lodret snit gennem et forsænket loft fremstillet af loftelementer 1 ifølge opfindelsen. Loftelemen- 150353 3 terne er fremstillet af en plade 2, f.eks. af stål i en tykkelse på 0,7 - 1,0 mm med et oven på pladen liggende lag af mineraluld til varmeisolering og til dæmpning af lydgennemgang fra den oven over det forsænkede loft beliggende konstruktion, f.eks. trinstøj. Pladen 2 er langs siderne forsynet med opbukkede sideflanger 3, der yderligere ved deres fri kanter er forsynet med ombukninger 4 og 5. Ombukningen 4 vender udefter og danner et nedefter åbent spor, medens ombukningen 5 vender indefter og danner et lidt smallere spor, der ligeledes er åbent nedefter. Ombukningerne tjener to formål, nemlig for det første at tjene til samling af tilstødende loftelementer og for det andet at forøge inertimomentet af pladens 2 tværsnit så meget, at loftelementerne fortrinsvis kan bære sig selv fra væg til væg. Er afstanden mellem væggene så stor, at loftelementerne ikke vil kunne være fritbærende, kan ombukningerne tjene til fastgørelse af bærekroge, der hænger ned fra den oven over beliggende bærekonstruktion.The drawing shows a vertical section through a recessed ceiling made of ceiling elements 1 according to the invention. The ceiling elements are made of a plate 2, e.g. of steel in a thickness of 0.7 - 1.0 mm with a layer of mineral wool on top of the plate for heat insulation and attenuation of sound penetration from the structure located above the recessed ceiling, e.g. Step noise. The plate 2 is provided along the sides with curved side flanges 3 which are further provided at their free edges with bends 4 and 5. The bend 4 faces outward and forms a downwardly open groove, while the bend 5 faces inward and forms a slightly narrower groove which also is open downstairs. The bends serve two purposes, namely, firstly, to serve to assemble adjacent ceiling elements and, secondly, to increase the moment of inertia of the cross-section of the plate 2 so that the ceiling elements can preferably carry themselves from wall to wall. If the distance between the walls is so great that the ceiling elements will not be able to support freely, the bends can serve to secure the supporting hooks which hang down from the supporting structure above.

For yderligere at sammenholde de op til hinanden stødende loftelementer er der på den ene sideflange en langsgående fordybning 6 placeret tilnærmelsesvis midt mellem elementets underside og ombukningen 4 eller 5. På den anden sideflange er der placeret fremspring 7, der er indrettet til at gribe ind i fordybningen 6 på et tilstødende element. Når to elementer er placeret tæt op til hinanden er de forhindret i at forskyde sig i forhold til hinanden i lodret retning, hvilket dels sikrer at loftet forbliver plant, dels bevirker en indbyrdes afstivning af loftelementerne, hvorved spændvidden kan forøges. Låsevirkningen ophører, så snart to tilstødende elementer bringes til at danne en vinkel, og opsætning og nedtagning fra den ene eller den anden ende af loftet kan derfor ske uden videre. Fortrinsvis er fremspringene 7 ikke gennemløbende, men består af med afstand anbragte, tilnærmelsesvis runde fremspring. Denne udformning letter adskillelse af to plader midt i en loftsflade, idet adskillelsen kan ske ved at der i sprækken mellem loftelementerne indsættes en plade af samme tykkelse som højden af fremspringene, hvorefter elementerne kan forskydes i i forhold til hinanden.To further compare the adjoining ceiling elements, on one side flange is a longitudinal recess 6 located approximately midway between the underside of the element and the bend 4 or 5. On the other side flange are projections 7 arranged to engage the the recess 6 on an adjacent element. When two elements are placed close to each other, they are prevented from moving in relation to each other in the vertical direction, which partly ensures that the ceiling remains flat and partly causes a mutual stiffening of the ceiling elements, whereby the span can be increased. The locking action ceases as soon as two adjacent elements are formed to form an angle, and set-up and dismounting from one or the other end of the ceiling can therefore be done without delay. Preferably, the projections 7 are not continuous but consist of spaced, approximately round projections. This design facilitates separation of two sheets in the middle of a ceiling surface, the separation being effected by inserting into the gap between the ceiling elements a plate of the same thickness as the height of the projections, after which the elements can be displaced relative to each other.

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Tykkelsen af mineraluldsisoleringen er fortrinsvis så stor, at overkanten af mineraluldspladerne ligger over den fri kant af ombukningerne. Eventuelle røggasser, som under en brand måtte trænge igennem sprækkerne mellem tilstødende elementer, vil derved blive diffuseret i mineralulden, hvorved muligheden for at røggasserne anretter skade i rummet over loftelementerne reduceres. løvrigt danner sprækkerne mellem de tilstødende loftelementer en labyrint, som vanskeliggør gennemtrængning af røggasser. Tætheden over for røggasser er iøvrigt også fordelagtig i isoleringsmæssig henseende over for varme og lyd.The thickness of the mineral wool insulation is preferably so great that the upper edge of the mineral wool sheets is above the free edge of the bends. Any flue gases which, during a fire, have to penetrate the cracks between adjacent elements, will thereby be diffused in the mineral wool, thereby reducing the possibility of the flue gases causing damage in the space above the ceiling elements. leafy, the cracks between the adjoining ceiling elements form a maze which complicates the penetration of flue gases. Moreover, the density against flue gases is also advantageous in isolation from heat and sound.