FIXING DEVICE AND IMAGE FORMING APPARATUS

• Main Authors: SAWADA KAZUNARI, ISHII KENJI, SEKI TAKAYUKI, FUJIMOTO IPPEI, KAWABATA KEISUKE, SETO TAKASHI, SHIMIZU MISAKI
• Format: Patent
• Language: English; Japanese
• Published: 14.12.2017
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a fixing device that is designed for a plurality of sizes of recording media and suppresses unevenness in temperature in the longitudinal direction of a fixing member.SOLUTION: A fixing device comprises: end-part heat sources 26a and 26b and center-part heat sources 23A and 23B that respectively have heating areas partially overlap with each other in the longitudinal direction of a fixing member 21; a plurality of fixing member temperature detection means 51 that are arranged in parts other than the overlapping parts to detect the temperature of a fixing member; first pressure member temperature detection means 61A that is arranged in a part other than the overlapping parts to detect the temperature of a pressure member; and second pressure member temperature detection means 61a and 61b that are arranged in the overlapping areas to detect the temperature of the pressure member. The fixing device controls the center-part heat sources and/or end-part heat sources on the basis of detection information from the fixing member temperature detection means, first pressure member temperature detection means, and second pressure member temperature detection means.SELECTED DRAWING: Figure 7 【課題】 複数のサイズの記録媒体に対応すると共に、定着部材の長手方向の温度ムラを抑制する定着装置を提供する。【解決手段】 端部熱源２６ａ，２６ｂの発熱領域と、中央部熱源２３Ａ，２３Ｂの発熱領域とは、定着部材２１の長手方向において、一部で重複し、重複部以外に配置され、定着部材の温度を検知する複数の定着部材温度検知手段５１と、重複部以外に配置され、加圧部材の温度を検知する第１の加圧部材温度検知手段６１Ａと、重複部に配置され、加圧部材の温度を検知する第２の加圧部材温度検知手段６１ａ，６１ｂと、を有し、定着部材温度検知手段と、第１の加圧部材温度検知手段と、第２の加圧部材温度検知手段との検知情報に基づいて、中央部熱源及び／又は端部熱源を制御する。【選択図】図７