| 摘要 |
PROBLEM TO BE SOLVED: To prevent a door from being easily opened from the outside by arranging the screw of a rotary metal fitting and the screw of a fixed metal fitting in positions covered with the rotary metal fitting. SOLUTION: A door mounting frame 2 comprises a rotatable rotary metal fitting 21. The mounting screw 22 of the rotary metal fitting 21 and the mounting screw 13 of a fixed metal fitting 10 are arranged on the inside so as to be covered with the rotary metal fitting 21 in the locked state. A hole 23 for inserting a locking ring 12 is formed at the tip of the rotary metal fitting 21, and an opening 24 for inserting the tip of a sliding shaft 11 is formed at the root thereof. A door is closed, the rotary metal fitting 21 is rotated to insert the tip of the locking ring 12 through the hole 23 of the rotary metal fitting 21, and a lock such as padlock is inserted to the locking ring 12 to lock the door. According to this, since the screw 22 of the rotary metal fitting 21 and the screw 13 of the fixed metal fitting 10 are covered with the metal fitting 21, the screws can not be loosened from the outside.
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