| 摘要 |
PROBLEM TO BE SOLVED: To provide a ceiling inspection hole that facilitates an assembling operation and is reducible in cost by shortening an operation time.SOLUTION: An outer frame member 11 which constitutes an outer frame 10 is provided with a locking projection piece 16, and an inner frame 20 which can be opened into the outer frame and closed is provided with an upper groove part 23 at an upper end of an inner frame main part 22 and a lower groove part 24 at a flange part 25 extending to a lower end of the inner frame main part. A locking lock member 30 includes, in one body, a main body part 31 which is brought into slide contact with the inner frame main part of the inner frame member on an opening/closing end side of the inner frame; a locking projection part 32 which can be locked to and unlocked from the locking projection piece; an upper edge part 33 which can be locked to an upper groove part; a lower edge part 34 which can be locked to a lower groove part; a connection part 35 which is inserted movably into a cut part 26 provided at an outside flange part; and a knob part 36 for operation provided at a lower edge part of the connection part 35, the lower edge part being formed to elastically deform to and from the main body part. The locking lock member is mounted movably on the inner frame by engaging the upper edge part of the locking lock member to the upper groove part and elastically deforming the lower edge part to engage the lower edge part with the lower groove part. |
