| 摘要 |
PROBLEM TO BE SOLVED: To facilitate the cleaning work of a dustproofing filter at a maintenance time by fitting the dustproofing filter so that it is freely attached and detached to/from a filter fitting part from the outside. SOLUTION: A ventilation fan 41 is housed in the inside of an optical cover surrounding an exposure part so as to exhaust air from an exhaust port by taking in the external air from a suction port 38 and bringing an air current into contact with the exposure part and the inside surface of the contact glass of an original platen. Then, a gap is formed between a main body left cover 36 and an optical left side plate 39 at the upper part of a discharge cover. By this gap, the filter fitting part 42 is constituted. When the dustproofing filter 44 is fitted, the discharge cover is opened so that the filter 44 is inserted in the fitting part 42 being the gap between the cover 36 and the plate 39 from the lower part. At this time, an engagement projection part 48 is made to abut on a lock projection part 43 and inserted in the fitting part 42 while being deflected inside in a thickness direction. When the filter 44 is removed, the discharge cover is opened so that the filter 44 is drawn out by holding an operation knob 49 exposed from the lower end of the cover 36. |
