| 摘要 |
PROBLEM TO BE SOLVED: To enhance the controllability of a lock after it is inserted in a stile. SOLUTION: At the stage where a bracing 3 and a lock 4 integrated together by locking a bracing side projection 36 and a lock side recess part 44 together are inserted in the upper end of a meeting side stile 2, the bracing 3 is fixed in place by the elastic deformation of an elastically deforming part 33 caused by the approach of the abutting parts 31R, 31L of the bracing 3 which abut against an upper rail S, and the lock side recess part 44 is separated from the bracing side projection 36 to automatically remove the lock 4 from the bracing 3.
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