| 摘要 |
PURPOSE:To preclude trouble due to the heating of the toner in a waste toner tank by providing a space for ventilation between the wall of an image forming case and the wall of the waste toner tank and sticking a heat insulator on the wall contacting this space. CONSTITUTION:The ventilation space 31 is provided between the walls 20a and 21a of the image forming case 21 and then air flows in from the bottom plate of a device main body through an air vent 30 and flows upward. Then heat insulators 21b and 21b are stuck on the space side of the wall 21a and on the wall 20a on the side of the waste toner tank 15. Consequently, the heat of the fixing roller 9-1 of a fixing device 9 is cut off effectively by the air flowing in the ventilation space 31 and the heat insulators 21b and 20b and a rise in the temperature in the tank 15 is suppressed. Thus, the caking of the toner in the waste toner tank, resulting toner amount misdetection, a defect in cleaning, etc., are eliminated. |
