PURPOSE: To prevent the collapse of a sash and glass at the time of a fire by hooking and connecting an indoor side frame material and an outdoor side frame material with a support member made of multiple fitting pieces connected by a metal wire. ;CONSTITUTION: A heat insulating material 5 and an airtight material 6 are inserted between members of a metal sash constituted of an indoor side frame material 1, an outdoor side frame material 2, a frame 3, and a bead 4, and glass 7 is fitted. Multiple fitting pieces 9 made of metal or ceramic are caulked to a metal wire 11 and fitted. A pair of coupling sections 10 of a support member 8 are coupled and hooked with projections inside the frame materials 1, 2 and integrally connected. Even if the heat insulating material 5 disappears at the time of a fire, the collapse and destruction of the sash and glass due to the deformation of the frame materials 2, 3 can be prevented, the fire resistance can be maintained, the support member 8 can be easily fitted, and the reduction of the appearance and decorative design can be prevented because the support member 8 is installed inside the sash.;COPYRIGHT: (C)1994,JPO
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