FIXING DEVICE AND IMAGE FORMING APPARATUS

To prevent a reduction in the life of a fixing device as much as possible, while preventing the generation of abnormal noise due to stick slip during idling of a fixing rotating body.SOLUTION: A fixing device passes a sheet on which an unfixed toner image is formed through a nip part between a heati...

Full description

Saved in:
Bibliographic Details
Main Authors SATO TOMOYA, OTSUKA YUTAKA
Format Patent
LanguageEnglish
Japanese
Published 18.02.2022
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
Online AccessGet full text

Cover

More Information
Summary:To prevent a reduction in the life of a fixing device as much as possible, while preventing the generation of abnormal noise due to stick slip during idling of a fixing rotating body.SOLUTION: A fixing device passes a sheet on which an unfixed toner image is formed through a nip part between a heating rotating body and a pressure rotating body to execute a fixing job. At the timing to start idling, when the total number of prints is determined to be less than a threshold Mth (No in S12), the fixing device executes idling with the rotation speed of the heating rotating body as V1, and when the total number of prints is equal to or more than the threshold Mth (Yes in S12) and when a heat storage index indicating a warming up degree of nip part forming members is equal to or more than Tth (Yes in S15), the fixing device sets the rotation speed of the heating rotating body to V2 faster than V1 (S16) before executing idling.SELECTED DRAWING: Figure 10 【課題】定着回転体を空回転させるときのスティックスリップによる異音の発生を抑制しつつ、定着装置の短寿命化を可及的に防ぐ。【解決手段】加熱回転体と加圧回転体のニップ部に未定着トナー像が形成されたシートを通紙して、定着ジョブを実行する定着装置であって、空回転開始のタイミングにおいて、総印字枚数が閾値Ｍth未満と判定された場合には（Ｓ１２でＮｏ）、加熱回転体の回転速度をＶ１として空回転を実行するが、上記総印字枚数が閾値Ｍth以上の場合であり（Ｓ１２でＹｅｓ）、かつ、ニップ部形成部材の温まり具合を示す蓄熱指標値がＴth以上の場合には（Ｓ１５でＹｅｓ）、加熱回転体の回転速度をＶ１より高いＶ２に設定して（Ｓ１６）空回転を実行する。【選択図】図１０
Bibliography:Application Number: JP20200135202