| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter device which can reduce production costs by minimizing the number of parts and the assembling man-hour and has an simply handlable adjustor panel. SOLUTION: Four frame plates 23 and 24 as aluminum extrusion molded products are assembled in a rectangular form by overlapping end parts and the overlapped end parts of the frame plates 23 and 24 are connected together by upset caulking to form a rectangular holding frame 22. In a state where a filter 25 is pressed by a wire frame 26 on the rear of the holding frame 22, the wire frame 26 is elastically deformed and protruding bent parts 26d at both ends thereof 26 are retained on a wire retaining part 23c which is integrally formed on the rear of the frame plate 23 over the entire length of the frame plate 23 to mount the filter 25 and the wire frame 26 on the holding frame 22. |
