Patent ID: 6014846
Filing Date: 2000-01-18
Classification: E06B,Y10S

Abstract:
A multi-window sash comprising a plurality of sash units, to each of which a panel is mounted and which are connected with each other in a panel width direction, and mullion means connecting adjacent two sash units and including at least a mullion having an expandable structure, said expandable mullion means comprising:a first mullion section having one side surface in a panel width direction provided with a recessed portion and having water-tight member attachments and guide pieces which are attached to respective opposing inner surfaces of the recessed portion; anda second mullion section fitted to the recessed portion of said first mullion section in the panel width direction,wherein water-tight members are mounted to the respective water-tight member attachments so as to be pressed against both side end surfaces in a panel thickness direction of the second mullion section and the guide pieces are disposed so as to oppose to both the side end surfaces in the panel thickness direction of the second mullion section with small gaps, respectively, to thereby impart an expandable function to the first and second mullion sections.