| 摘要 |
PROBLEM TO BE SOLVED: To prevent the situation of forming a penetration port of a flame even when a fire is caused.SOLUTION: A fitting is constituted so as to open-close a sash 20 to an opening frame 10 by operation of an opening-closing link mechanism 40 when rotatably operating an operator shaft 32, and comprises a frame side engaging piece 50 for bending a tip part upward by projecting toward an aspect surface of a bottom rail 23 from a lower frame 12 and a rail side engaging piece 60 for bending the tip part downward by projecting toward the lower frame 12 in an opposed state to the frame side engaging piece 50 from a position of becoming upward more than the frame side engaging piece 50 in the aspect surface of the bottom rail 23, and the frame side engaging piece 50 and the rail side engaging piece 60 allow the opening movement of the sash 20 to the opening frame 10 when the operator shaft 32 is rotatably operated in a state of being arranged in an installation attitude, and regulates the opening movement of the sash 20 to the opening frame 10 by mutually engaging via a mutually bent part when the operator shaft 32 is displaced downward.SELECTED DRAWING: Figure 7 |
