Abstract: Furniture frames, such as futon frames, are movable between bed configurations and sofa configurations. Furniture frame embodiments according to the invention provide a more level, continuous and secure sleep surface than currently available. The central gap present in many futon frames, for example, is eliminated, as is a fourth cross rail. Manufacturing costs are reduced, and reliability is improved. Additionally, furniture frame embodiments include at least one topple member that engages the top of a depending backrest side or side and does not put pressure on a hole accommodating a pivot pin connecting the backrest panel and seat panel. Mechanical advantage is improved. Further, a working end of the depending backrest side can be produced with a single cut, eliminating the need for multiple cuts and/or attachment of separate pieces, thereby lowering manufacturing costs. Corresponding methods provide similar advantages.

Abstract: Furniture frames, such as futon frames, are movable between bed configurations and sofa configurations. Furniture frame embodiments according to the invention provide a more level, continuous and secure sleep surface than currently available. The central gap present in many futon frames, for example, is eliminated, as is a fourth cross rail. Manufacturing costs are reduced, and reliability is improved. Additionally, furniture frame embodiments include at least one topple member that engages the top of a depending backrest side or side and does not put pressure on a hole accommodating a pivot pin connecting the backrest panel and seat panel. Mechanical advantage is improved. Further, a working end of the depending backrest side can be produced with a single cut, eliminating the need for multiple cuts and/or attachment of separate pieces, thereby lowering manufacturing costs. Corresponding methods provide similar advantages.