Problem: avoid the occurrence of steps on the floor surface.The folding door 1 is a folded door in which a new frame 3 for refurbishing is attached to the inside of the existing frame 2 while the existing frame 2 installed in the opening opening op of the building is left, so that the new window 5 for remolding can be folded.The new frame 3 is composed of three frame members, i.e., a new upper frame 31 mounted on the existing upper frame 21 constituting the existing frame 2, and a pair of new vertical frames 32, 33 attached to a pair of existing vertical frames 23 and 24 constituting the existing frame 2.The new window 5 can be folded by moving along the existing lower frame rail provided on the existing lower frame 22 constituting the existing frame 2.A new restriction member for refurbishing is provided at a position opposed to the existing lower frame 22 so that the suspending side of the new window 5 is not movable toward the door side along the existing lower frame rail.Diagram
展开▼
