| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter which is easy to disassemble after use and can prevent air leak completely while keeping JIS standard.SOLUTION: A filter 1 has a molding object where one of end surface parts 6 of a filter pack 3 that holds gaps of a folding space of a filter material folded zigzag and is made into a pack and the other end surface part 7 are sealed by a seal material 5 and a wooden polygonal outer frame 2 that fixes the molding object and is attached to an object to be attached. On an end surface part 10 of the outer frame 2 facing the object to be attached a gasket 11 is placed. Across from an outer edge part 30 on a gasket placement AI side of the air of the molding object to an inner surface 31 of the outer frame 2, a seal material 20 for air leak prevention, which fixes the molding object with respect to the outer frame 2, is placed. At least from angular parts P1 to P4 of the outer frame 2, the seal material 20 for air leak prevention is placed extendedly from the outer edge part 30 on the gasket placement side of the air of the filter pack 3 across the inner surface 31 of the outer frame 2 to the gasket 11. |
