Ceiling panel

Abstract

The invention relates to a metal ceiling panel having flange portions with complementary engagement areas formed such that two juxtaposed panels can be interconnected in a tight manner. The shape of the flange portions corresponds to the contour of an inclined S whereby the joint between two such panels becomes even tighter in the event of a substantial increase of the temperature in the space below the ceiling panel. The shape of the flange portions also brigs about an increased stability of an underside covering for a ceiling formed by a plurality of such panels when exposed to a fire.

1 . A ceiling panel ( 1 ) of metal intended to form an underside covering for a ceiling upon assembly with a plurality of corresponding ceiling panels, said ceiling panel comprising: 
 a web portion ( 5 ) which defines a main extent plane for the ceiling panel ( 1 ), and which is adapted to face the underlying room in the mounted state of the ceiling panel,    said web portion ( 5 ) having a first longitudinal edge side ( 9 ), a second longitudinal edge side ( 8 ) and transverse edge sides,    a first longitudinal flange portion ( 40 ) connected with the web portion ( 5 ) at the first longitudinal edge side ( 9 ),    a second longitudinal flange portion ( 20 ) connected with the web portion ( 5 ) at the second longitudinal edge side ( 8 ),    said flange portions ( 20 ,  40 ) comprising complementary engagement areas ( 21 ,  41 ) adapted to generate a releasable locking engagement between the flange portions ( 20 ,  40 ) on two juxtaposed ceiling panels ( 1 ),    characterized in    that the first longitudinal flange portion ( 40 ) exhibits: 
 a first part ( 42 ), which extends upwards and outwards away from the central area of the web portion ( 5 ) at an acute angle α relative to a normal to the main extent plane, and which merges into  
 a second part ( 44 ), which extends downwards back in a direction toward the central area of the web portion ( 5 ) at an angle θ relative to a normal to the main extent plane, and which merges into  
 a third part ( 46 ), which extends upwards and outwards away from the central area of the web portion ( 5 ) at an acute angle β relative to a normal to the main extent plane, and which merges into  
 a fourth part ( 48 ), which extends upwards and outwards away from the central area of the web portion ( 5 ) at an angle φ relative to a normal to the main extent plane, and  
   that the second flange portion ( 20 ) exhibits: 
 a first part ( 22 ), which extends upwards and inwards toward the central area of the web portion ( 5 ) at an acute angle of about α relative to a normal to the main extent plane, and which merges into  
 a second part ( 24 ), which extends downwards in a direction away from the central area of the web portion ( 5 ) at an angle of about θ relative to a normal to the main extent plane, and which merges into  
 third part ( 26 ), which extends upwards and inwards toward the central area of the web portion ( 5 ) at an acute angle of about β relative to a normal to the main extent plane.  
   
     
     
         2 . A ceiling panel according to  claim 1 , characterized in 
 that the first flange portion ( 40 ) comprises a longitudinal locking section ( 50 ), which extends from the engagement area ( 41 ) upwards and outwards away from the central area of the web portion ( 5 ) at an acute angle γ relative to a normal to the main extent plane, and which has a free edge arranged at the greatest distance from the web portion ( 5 ) relative to the rest of the flange portion ( 40 ), whereby the longitudinal locking section ( 50 ) by folding deformation provides an obstacle to the release of said locking engagement.    
     
     
         3 . A ceiling panel according to  claim 1  or  2 , characterized in 
 that it applies to the first longitudinal flange portion ( 40 ):  
 that the angle α is between 5° and 30°, preferably between 10° and 15°,  
 that the angle θ is between about 110° and 130°,  
 that the angle β is between 5° and 30°, preferably between 10° and 15°,  
 that the angle φ is between 55° and 85°, preferably between 65° and 80°.  
 
     
     
         4 . A ceiling panel according to one of the preceding claims, characterized in 
 that said third part ( 26 ) of the second flange portion ( 20 ) merges into    a fourth part ( 29 ), which, via a bend ( 28 ), extends downwards approximately in parallel with said third part ( 26 ) on the side thereof facing the web portion ( 5 ).    
     
     
         5 . A ceiling panel according to one of the preceding claims, characterized in that the releasable engagement is produced by cooperation between the fourth part ( 48 ) of the first flange portion ( 40 ) and the third part ( 26 ) of the second flange portion ( 20 ).  
     
     
         6 . A ceiling panel according to any one of the preceding claims, characterized in that the web portion ( 5 ) and the first ( 40 ) and the second ( 20 ) flange portions are formed in one piece by bending of a plate.  
     
     
         7 . A ceiling panel according to any one of the preceding claims, characterized in that the locking engagement is provided by elastic deformation of at least one of the flange portions ( 20 ,  40 ).  
     
     
         8 . A ceiling panel according to any one of the preceding claims, characterized in that it applies to the second flange portion ( 20 ) that the angles α, β and θ differ from the corresponding angles of the first flange portion ( 40 ) by ±2°.  
     
     
         9 . A ceiling panel according to the preceding claim, characterized in that the angle (x) between the first part ( 42 ) and the second part ( 44 ) of the first flange portion ( 40 ) is greater than the angle (x′) between the first part ( 22 ) and the second part ( 24 ) of the second flange portion ( 20 ), and that the angle (y) between the second part ( 44 ) and the third part ( 46 ) of the first flange portion ( 40 ) is smaller than the angle (y') between the second part ( 24 ) and the third part ( 26 ) of the second flange portion ( 20 ) to provide a clamping force in the assembly of two ceiling panels ( 1 ).  
     
     
         10 . A ceiling panel according to any one of the preceding claims  1 - 7 , characterized in that it applies to the second flange portion ( 20 ) that the angles α, β and θ are equal to the corresponding angles of the first flange portion ( 40 ).  
     
     
         11 . A ceiling panel according to any one of the preceding claims, characterized in that the angle α is equal to the angle β.  
     
     
         12 . An underside covering produced by assembling a plurality of ceiling panels according to claims  1 - 11  arranged side by side.