| 摘要 |
PROBLEM TO BE SOLVED: To provide an entrance sash securing sufficient airtightness between a frame body and a sash. SOLUTION: The entrance sash is formed by enclosing inner and outer sashes 2, 3 in a double sliding manner in a frame body 1. An upper face of a lower frame 11 is provided with rails 15a, 15b inside and outside to guide the inner and outer sashes respectively, and airtight rails 15d, 15e are respectively provided near the respective rails 15a, 15b. Both ends of the lower frame have approximately flat sweep-out parts 16 across the indoor side and the outdoor side. Sweep-out part cover bodies 30 are mounted to the sweep-out parts to cover the upper faces, and a mounting part 33 is formed in at least an inner or outer rail position of the sweep-out part cover body. A rail extension member 35 is attachable to and detachable from the mounting part. The rail extension member comprises a rail extension part 36 and an airtight rail extension part 37 continuous with a rail in the position of the mounting part and with an airtight rail in the vicinity respectively and extending to a lower frame end. COPYRIGHT: (C)2008,JPO&INPIT
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