| 摘要 |
PROBLEM TO BE SOLVED: To provide a window, in which the Construction Standard is determined so that the effective width of a vestibule entrance reaches 750mm or more when the window for sweepings is opened fully in a building corresponding to long-life society and the building is constructed gradually by joining mass-produced concrete panels or the like according to a process, but the Construction Standard is satisfied without changing the size of a skeleton element such as the concrete panel. SOLUTION: The handle 10 for the windows, 4L, 4R is constituted rotatably, and formed in a structure in which the handle can be housed in the stiles 4b, 4b of the windows. Storage switches 14, 14 are installed near the base section of the handle 10, the handle 10 can be rotated by depressing the storage switches 14, 14, a safety device 50 is mounted on the shank 13 of the handle, and the rotation of the handle 10 is controlled by working the safety device 50.
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