| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent from clogging of a toner filter, with a simple constitution by arranging a filter main body of a dust guard filter in a flowing path of air in a duct so as to slantly intersect with respect to the flowing path, and setting the flowing direction of the air form the oblique lower side of the filter main body to the up side. SOLUTION: The dust guard filter 60 is, fitted to the filter pack 56 from an opening 57 provided on a top surface the filter pack 56. The dust guard filter 60 is provided with a stopper blade 61 located outside, a frame body 62 integrally extended from the stopper blade 61, the filter main body 63 supported by the frame body 62, and a seal 64. At this time, the filter main body 63 is fitted in a state of inclined by a specific angle with respect to the stopper 61. In such a manner, since the filter main body 63 is set in the inclined direction instead of vertical direction with respect to the flowing direction of the toner moving inside the duct, the toner in the air entering from the slopewise left side is caught. The toner being caught there, falls below when a fan stops, therefore the clogging is prevented. |
