| 摘要 |
PROBLEM TO BE SOLVED: To provide a ceiling inspection hole which is safe because an inner frame body is not put in a rapid opening/closing motion when opened/closed, which prevents a load from being imposed on a rotating part, and which hardly causes a hindrance etc. over a long period of time. SOLUTION: This ceiling inspection hole comprises an outer frame body which is mounted on an opening opened in a ceiling board, and the inner frame body which is assembled to the opening of the outer frame body in such a manner as to be capable of being opened/closed by an opening/closing member. The opening/closing member comprises a slender plate-like opening/closing arm, one end of which has a relatively short bent part, and a bent spring member. In the opening/closing arm, rotation stoppers are formed at both ends, respectively; the vicinity of one end is rotatably journaled on an outer frame member; and the other end is rotatably journaled on the inner frame body. The spring member is latched to a latching member which is provided on the outer frame body, and also latched to a latching member which is provided in the inner frame body. Thus, the inner frame body is urged in a closed direction. COPYRIGHT: (C)2007,JPO&INPIT
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