FIXING DEVICE AND IMAGE FORMING APPARATUS

• Main Authors: SAKURAI YUSUKE, SAWAMURA ATSUSHI, SATO HIDEKI, IWAI KIYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 02.07.2020
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

To prevent a movement of a belt along a longitudinal direction, compared with a case where a tensile force of the belt along the longitudinal direction is made the same.SOLUTION: A fixing device comprises: a rotating endless belt 42; fixing means 41 that is in contact with the belt 42 to form a fixing nip part N; pressing means that is arranged inside the belt 42 and presses the belt 42 against the fixing means 41; support means 45 that is arranged inside the belt 42 and supports a center part of the belt along a longitudinal direction on the outside of both ends, along a direction intersecting the longitudinal direction of the belt 42; and guide means 48, 49 that guide both ends of the belt 42 along the longitudinal direction on the outside of the position supported by the support means 45, along the direction intersecting the longitudinal direction of the belt 42.SELECTED DRAWING: Figure 3 【課題】ベルトの長手方向に沿った張力を同一とした場合に比べ、ベルトの長手方向に沿った移動を抑制する。【解決手段】回転する無端状のベルト４２と、前記ベルト４２と接触して定着ニップ部Ｎを形成する定着手段４１と、前記ベルト４２の内部に配置され前記ベルト４２を前記定着手段４１に加圧する加圧手段と、前記ベルト４２の内部に配置され、前記ベルトの長手方向に沿った中央部を両端部より前記ベルト４２の長手方向と交差する方向に沿った外側で支持する支持手段４５と、前記ベルト４２の長手方向に沿った両端部を前記支持手段４５が支持する位置より前記ベルト４２の長手方向と交差する方向に沿った外側で案内する案内手段４８、４９と、を備える。【選択図】図３