FIXING DEVICE AND IMAGE FORMING APPARATUS

• Main Authors: GOTO SO, YOSHINAGA HIROSHI, UCHITANI TAKESHI, HASE TAKAMASA, ISHII KENJI, TAKAGI HIROTADA, SATO MASAHIKO, YOSHIURA ARINOBU, SUZUKI AKIRA, YOSHIKAWA MASAAKI, OGAWA SADAFUMI, KAWADA TEPPEI, SESHIMO TAKUYA, IMADA TAKAHIRO, YUASA SHUTARO, YAMAJI KENSUKE, IWATANI NAOKI, SHIMOKAWA TOSHIHIKO, SAITO KAZUYA
• Format: Patent
• Language: English; Japanese
• Published: 16.07.2015
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a fixing device capable of preventing a belt from being damaged or ruptured by reducing a load on the belt.SOLUTION: A fixing device comprises: a rotatable and endless fixing belt 21; a nip forming member 24 arranged inside the fixing belt 21; a supporting member 25 for supporting the nip forming member 24; an opposite rotor 22 for forming a nip part N between the fixing belt and itself by abutting itself on the nip forming member 24 via the fixing belt 21; a heat source 23 for heating the fixing belt 21; and a belt holding member for rotatably holding an end of the fixing belt 21. In the nip forming member 24, an upstream side from the center of the nip part N is formed to be longer than a downstream side from that. 【課題】ベルトへの負荷を軽減し、ベルトの破損又は破断を防止することができる定着装置を提供する。【解決手段】回転可能な無端状の定着ベルト２１と、定着ベルト２１の内側に配設されたニップ形成部材２４と、ニップ形成部材２４を支持する支持部材２５と、定着ベルト２１を介してニップ形成部材２４と当接して定着ベルト２１との間にニップ部Ｎを形成する対向回転体２２と、定着ベルト２１を加熱する加熱源２３と、定着ベルト２１の端部を回転可能に保持するベルト保持部材とを備えた定着装置におけるものである。ニップ形成部材２４は、ニップ部Ｎ中心から上流が、下流側よりも長く形成されている。【選択図】図２