ES1044079U - Convertible sofa bed. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Convertible sofa bed, which is constituted from a metal structure with several parts linked together to allow folding or unfolding, in order to indifferently get the positions for sofa and bed, is characterized by comprising three frames articulated correlatively between yes and a fourth independent frame in support functions for the assembly formed by them; having provided that the three articulated frames are in rectangular shapes and the articulation between them is located in correspondence with the adjacent stringers thereof, the first frame constituting the seat which incorporates tension springs, which is equipped with a couple of supports in its previous corners, a pair of wheels in its rear corners and a pair of arms with lower support wheels in correspondence with intermediate points of its rear spar; while the intermediate and third frames constitute the backrest in the sofa position, with the particularity that the support frame is constituted by two pairs of lateral crosspieces, both joined together by a rear spar and provided with supports on the floor, the crosspieces being in the same horizontal plane and counting each pair with two crossbars to the crossbars themselves, in proximity to their front end and rear end, said stop plates forming retention stops for the wheels of the first frame, in the position of rest of the assembly, and possible to be exceeded by said rollers when the traction or thrust of said first frame is performed for the corresponding folding/unfolding. (Machine-translation by Google Translate, not legally binding)