FIXING DEVICE AND IMAGE FORMING APPARATUS

To prevent a trouble caused by thermal expansion of a heating roller and a heat insulating member without complicating a structure.SOLUTION: A fixing device 9 comprises: a heating roller 21; a pressure roller 27 that sandwiches a sheet S with the heating roller 21; a heating unit that heats the heat...

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Bibliographic Details
Main Author ONISHI SHOTA
Format Patent
LanguageEnglish
Japanese
Published 11.04.2022
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:To prevent a trouble caused by thermal expansion of a heating roller and a heat insulating member without complicating a structure.SOLUTION: A fixing device 9 comprises: a heating roller 21; a pressure roller 27 that sandwiches a sheet S with the heating roller 21; a heating unit that heats the heating roller 21; heat insulating members 31 that each are provided on an outer peripheral surface of an end in an axial direction of the heating roller 21, have heat resistance against heat transmitted from the heating roller 21, and have an inclined shape in which its outer diameter is reduced toward the inside in the axial direction of the heating roller 21; and bearings 22 that each support the heating roller 21 with the heat insulating member 31 therebetween.SELECTED DRAWING: Figure 4 【課題】構造を複雑化させずに、加熱ローラー及び断熱部材の熱膨張による不具合を抑制することを目的とする。【解決手段】定着装置９は、加熱ローラー２１と、加熱ローラー２１との間にシートＳを挟持する加圧ローラー２７と、加熱ローラー２１を加熱する加熱部と、加熱ローラー２１の軸方向の端部の外周面に設けられ、加熱ローラー２１から伝達される熱に対する耐熱性を有し、加熱ローラー２１の軸方向の内側ほど外径が小さい傾斜形状の断熱部材３１と、断熱部材３１を介して加熱ローラー２１を支持する軸受２２と、を備える。【選択図】図４
Bibliography:Application Number: JP20200165052