Plane for the seat of armchairs, divans, chairs or similar, with devices for the fixing of the belts that take advantage of the tension of themselves in order to constrain them to the support framework

Claim 1

A plane for a seat of an armchair, divan, chair or similar furniture, the plane comprising: a pair of spaced apart lateral sections, each lateral section having a downwardly protruding tongue; a pair of U shaped elements corresponding to the pair of downwardly protruding tongues, one U shaped element oriented around each protruding tongue; a plurality of belts connected between the pair of spaced apart lateral sections, each belt having a pair of ends, one end of each belt passing around outside one of the U shaped elements, folded back and interposed between the same U shaped element and corresponding protruding tongue; the other end of each belt fastened in the same manner to the other U shaped element and other protruding tongue; and means for tensioning each of the plurality of belts, wherein the tension exerted by each belt is directed against each U shaped element such that each end of each belt is blocked against the corresponding protruding tongue, thereby constraining the belt in the framework.