FIXING DEVICE AND IMAGE FORMING APPARATUS

• Main Authors: SOMEYA YUKIMICHI, ADACHI TOMOYA, SHIMADA HIROYUKI, FURUICHI YUSUKE
• Format: Patent
• Language: English; Japanese
• Published: 04.10.2023
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

To provide a fixing device that suppresses variations in the clearance between a separation member disposed over a longitudinal direction and a fixing belt, and thereby can prevent the occurrence of separation failure and damage to the fixing belt.SOLUTION: A fixing device 9 comprises: a fixing belt 20; a heating body 22; a pressure roller 21 that forms a nip part N with the fixing belt 20; and a holding member 66 that has a holding part 66a disposed inside the fixing belt 20, and rotatably holds the fixing belt 20, wherein a recording medium P is conveyed through the nip part N. The fixing device has a separation member 40 that separates the recording medium P from the fixing belt 20. The separation member 40 has an urging member 42 that urges the separation member in a direction to approach the fixing belt 20, and a contact part 41 that is in contact with the fixing belt 20. A contact position of the contact part 41 with the fixing belt 20 is outside a passage area R of the recording medium P and is a position facing the holding part 66a of the belt holding member 66 with the fixing belt 20 therebetween.SELECTED DRAWING: Figure 3 【課題】長手方向にわたって配設される分離部材と定着ベルトとの離間距離の変動が抑制され、分離不良の発生と定着ベルトの損傷を防止することができる定着装置を提供する。【解決手段】定着ベルト２０と、加熱体２２と、定着ベルト２０との間にニップ部Ｎを形成する加圧ローラ２１と、定着ベルト２０の内側に配設される保持部６６ａを有し、定着ベルト２０を回転可能に保持する保持部材６６と、を備え、記録媒体Ｐがニップ部Ｎを通過して搬送される定着装置９であって、定着ベルト２０から記録媒体Ｐを分離させる分離部材４０を有し、分離部材４０は、定着ベルト２０に近接させる方向に付勢する付勢部材４２と、定着ベルト２０に当接する当接部４１と、を有し、当接部４１の定着ベルト２０に対する当接位置が、記録媒体Ｐの通過領域Ｒの外側であって、かつ定着ベルト２０を介してベルト保持部材６６の保持部６６ａと対向する位置である。【選択図】図３