| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensively structured air cleaning filter whose frame can be assembled or disassembled easily. SOLUTION: This air cleaning filter comprises a filter pack 1 for catching dust in the air, a unilateral frame member 2 for surrounding the top surface of the pack 1, a trilateral frame member 3 which surrounds both side faces and the undersurface of the pack 1 and has flexibility. The member 2 is abutted on the member 3 by inserting pins 5 arranged in both edge parts of the member 3 into insertion holes 4 arranged in both edge parts of the member 2 respectively while warping the member 3 so that the undersurface of a flange part 5c arranged at each of the pins 5 is engaged with the top surface of the member 2. The outside diameter of the screw part 5a of each of the pins 5 is slightly larger than the inside diameter of a screw hole 46 of the member 3. The length of an axial part 5b of each of the pins 5 is equal to the thickness of a main body part 11 of the member 2.
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