FIXING DEVICE

• Main Authors: TAKEUCHI KENJI, HANDA HIROSHI, FUJII YASUMASA, KAJITA MASAHITO, KURIKI HIROFUMI, TANAKA NORIFUMI
• Format: Patent
• Language: English; Japanese
• Published: 25.10.2018
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a fixing device comprising a pressure roller and a pressing member arranged inside an endless belt, and to suppress meandering of the endless belt.SOLUTION: A fixing device 100 comprises: a pressing member (pressing pad 220) that forms a first nip area N1; a pressure roller 230 that forms a second nip area N2; and a side guide 250 that is in contact with an end face of an endless belt 210. A part of the pressure roller 230 is located at a downstream side of the second nip area N2 in a first direction directed from the center N11 of the first nip area N1 to the center of rotation A1 of a rotating member (heating roller 110). The side guide 250 includes a first guide surface F11 that is located at an opposite side to the pressure roller 230 with respect to a virtual surface including the center N11 of the first nip area N1 and the center of rotation A1 of the rotating member, and a second guide surface F12 that is located at a downstream side of the center of rotation A1 of the pressure roller 230 in the first direction toward the pressure roller 230 with respect to the virtual surface and is arranged on the same plane as the first guide surface F11.SELECTED DRAWING: Figure 2 【課題】無端ベルト内に加圧ローラと加圧部材とが配置される構成において、無端ベルトの蛇行を抑えることを目的とする。【解決手段】定着装置１００は、第１ニップ領域Ｎ１を形成する加圧部材（加圧パッド２２０）と、第２ニップ領域Ｎ２を形成する加圧ローラ２３０と、無端ベルト２１０の端面と接触するサイドガイド２５０を備える。第１ニップ領域Ｎ１の中心Ｎ１１から回転部材（加熱ローラ１１０）の回転中心Ａ１に向かう第１方向で、加圧ローラ２３０の一部は、第２ニップ領域Ｎ２よりも下流に位置する。サイドガイド２５０は、第１ニップ領域Ｎ１の中心Ｎ１１と回転部材の回転中心Ａ１とを含む仮想面に対して加圧ローラ２３０とは反対側に位置する第１ガイド面Ｆ１１と、仮想面に対して加圧ローラ２３０側で、第１方向において加圧ローラ２３０の回転軸Ａ２よりも下流に位置し、第１ガイド面Ｆ１１と同一平面上に配置される第２ガイド面Ｆ１２を含む。【選択図】図２