| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fixing device capable of preventing occurrence of a large quantity of defective images such as fixing failure, by immediately detecting abnormal pressure-contact of the pressing member even when the abnormal pressure-contact with a heating member occurs during an image forming operation, and to provide an image forming apparatus using the fixing device. <P>SOLUTION: The fixing device includes: a pair of rotary bodies 43 and 44 disposed in pressure-contact with each other and forms a nip part N between them; a contact separation means 60 by which at least one of the pair of rotation bodies 43 and 44 is brought into pressure-contact with the other and separated therefrom; and a pressure-contact state monitoring means for monitoring the pressure-contact state of the pair of rotary bodies. The fixing device passes a paper with an unfixed toner image carried thereon through the nip between the pair of rotation bodies kept in pressure-contact with each other and, thereby, fixes the toner images. In the fixing device, the pressure-contact monitoring means 77 monitors the pressure-contact state of the pair of rotation bodies when at least a part of the paper 21 passes through the nip N. <P>COPYRIGHT: (C)2007,JPO&INPIT |
