| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress increase of a motor size and to realize a quick pressing operation of a pressure roller by a contact/separation mechanism, while sharing, with one motor, a power source of a fixation roller and a power source of the contact/separation mechanism for pressing the pressure roller toward the fixation roller by resilience of a spring or alienating the pressure roller from the fixation roller against the resilience. <P>SOLUTION: A power transmission mechanism from a motor 106 to a cam shaft 102 being a part of a contact/separation mechanism is branching to a first power transmission path 1220 and a second power transmission path 1300. A reduction ratio by the first power transmission path 1220 is set larger than a ratio by the second power transmission path 1300. When a plate cam 100 is rotated and a pressure roller is alienated from a fixation roller, the power of the motor is transmitted to the cam shaft 102 by the first power transmission path 1220, and when the pressure roller is pressed toward the fixation roller, the power of the motor is transmitted to the cam shaft 102 by the second power transmission path 1300. <P>COPYRIGHT: (C)2013,JPO&INPIT |
