| 摘要 |
PROBLEM TO BE SOLVED: To maintain an entrance guide and to make steadily performable satisfactory image formation for a long time, by forming, in the vicinity of a solenoid, an air duct for cooling it. SOLUTION: An electromagnetic solenoid 18 is provided near an entrance guide 17, on a base 23 outside the rear side plate 22 of the device. Also, a spring is provided below the entrance guide 17, and the entrance guide 17 is always deviated toward a fixing roller situated above. In the case where stiff transfer materials of a small size are consecutively carried to a fixing device, the electromagnetic solenoid 18 is kept energized for a long time, a gradual temperature increase occurs, the resistance value of the coils of the electromagnetic solenoid 18 changes and attractive force decreases. Consequently, the entrance guide 17 cannot be kept in a high position and a jam or the like is caused. Therefore, air is forcibly exhausted by providing a duct 30 for covering the electromagnetic solenoid 18 and providing a fan 21 at its outer end. This prevents temperature increase of the electromagnetic solenoid 18 and makes it possible to carry out steady fixing at all times. |
