CADRE DE DOSSIER POUR SIEGES, NOTAMMENT POUR SIEGES DE VEHICULES AUTOMOBILES

L'INVENTION CONCERNE UN CADRE DE DOSSIER POUR SIEGES, NOTAMMENT POUR SIEGES DE VEHICULES AUTOMOBILES, DONT LES LONGERONS LATERAUX DE DOSSIER SONT RELIES L'UN A L'AUTRE DANS LEUR PARTIE SUPERIEURE PAR UNE ENTRETOISE TRANSVERSALE, CEPENDANT QU'AU MOINS UN DESDITS LONGERONS LATERAUX PRESENTE, A SON EXTREMITE SUPERIEURE, UN EMPLACEMENT DE CONNEXION D'UNE CEINTURE DE SECURITE.LE LONGERON LATERAL 13 PRESENTANT L'EMPLACEMENT DE CONNEXION 16, DE LA CEINTURE DE SECURITE 17 EST DISPOSE DE FACON TELLE QUE SON AXE DE PLUS GRAND MOMENT RESISTANT SOIT ORIENTE SENSIBLEMENT SELON LA DIRECTION D'ATTAQUE DE LADITE CEINTURE DE SECURITE 17.APPLICATION A LA CONSTRUCTION DE SIEGES POUR VEHICULES AUTOMOBILES OU ANALOGUES. The frame of the seat in a motor vehicle has a base for the cushion which carries the weight of the occupant and a back rest which carries the cushion for the back of the occupant. The back rest has two upwardly extending parallel frame members and a connector between the upper ends of the frame members. The upper end of one frame member carries a takeup reel for the safety belt whose latch plate can be inserted into a buckle adjacent the lower end of the other frame member. When the belt is applied and is tensioned, such as in the event of an accident, it applies to the one frame member a force acting diagonally of the back rest and tending to bend the one frame member forwardly and toward the other side of the seat. The cross-sectional outline of the one frame member and the orientation of such cross-sectional outline are selected in such a way that the one frame member offers maximum resistance to deformation by the belt in the direction in which the belt acts thereon in the event of an accident. This renders it possible to reduce the wall thickness of the one frame member and to make such frame member of simple C-shaped, U-shaped or Z-shaped profiled stock.