| 摘要 |
PROBLEM TO BE SOLVED: To provide a cover body which improves airtightness between a wall material and the cover body.SOLUTION: A protruding part 47 including a hollow part 44 which can be filled with a filler J having fluidity is formed at a flange part 43. When an airtight cover 41 is inserted from a wall hole of a wall surface to be installed on a rear surface of a wall, the flange part 43 is deformed so that the hollow part 44 is crushed by a wall material W1 to cause the filler J to flow and contact with an inner peripheral surface of a wall hole W2 fitting the shape of the wall hole W2. Further, the flange part 43 contacts with the wall surface to close the wall hole W2. In other words, the flange part 43 has portions which contact with a surface of the wall hole W2 and the inner peripheral surface of the wall hole W2 and thus airtightness is improved. |
