Sofa-bed

A foldable sofa-bed of the type having serially connected deck, cavity, and intermediate sections movable between a folded seat position and a flat unfolded bed position, said deck and intermediate sections being pivotally joined to opposite ends of said cavity section at transverse pivot axes, said deck section being located at a foot end of said sofa-bed and said intermediate section being located at the head end of said sofa-bed and said cavity section having a rigid transverse anchor extending between opposite sides thereof,

• a second rigid transverse anchor fixed to said intermediate section adjacent the end of said intermediate section remote from said cavity section, an intermediate section fabric member having a first end adjacent said cavity section and a second end remote from said first end, first connector means securing said first fabric end to said cavity section rigid transverse anchor, second connector means securing said second fabric end to said second rigid transverse anchor, and the point of attachment of said first connector means to said cavity section rigid transverse anchor being offset relative to the pivot axis between said cavity section and said intermediate section, whereby in seat position of said sofa-bed said first and second connector means and said intermediate section fabric member tend to generally assume the position of the hypotenuse of a right triangle and in bed position assume the position of two sides of the same right triangle developed in a straight line, said intermediate section fabric member being thereby drawn taut in bed position and relaxed in seat position independently of the tautness of any fabric members attached to any other bed sections.

A foldable sofa-bed of the type having serially connected deck, cavity, and intermediate sections movable between a folded seat position and a flat unfolded bed position, said deck and intermediate sections being pivotally joined to opposite ends of said cavity section at transverse pivot axes, said deck section being located at a foot end of said sofa-bed and said intermediate section being located at the head end of said sofa-bed and said cavity section having a rigid transverse anchor extending between opposite sides thereof,

• a second rigid transverse anchor extending between opposite sides of said intermediate section at the head end of said intermediate section, and an intermediate section fabric extending between and secured at one end to said second transverse anchor and at the opposite end to said cavity section anchor,
• the point of attachment of said intermediate section fabric to said cavity section anchor being offset relative to the pivot axis between said intermediate section and said cavity section such that in seat position of said sofa-bed said intermediate section fabric tends to generally assume the position of a hypotenuse of a right triangle and in bed position assume the position of two sides of the right triangle containing said hypotenuse developed in a straight line such that said intermediate section fabric is drawn taut in bed position and relaxed in seat position independently of the tautness of any fabric attached to any other section of said sofa-bed.