定着装置、画像形成装置

Fixing device and image formation apparatus

Abstract

【課題】磁界発生部に対向して配置される対向ローラを含む複数のローラと、複数のローラ間に掛け渡され、複数のローラ間を循環駆動され電磁誘導により加熱されるベルトとを有する電磁誘導加熱方式の定着装置において、対向ローラの素材を熱硬化性樹脂に限定することなく、定着ベルトから複数のローラに加えられる押圧力が変化したときの定着ベルトの発熱量の変化を抑制する。 【解決手段】ベルトを掛け渡す複数のローラのうち、対向ローラ以外のローラの少なくとも1つのローラの硬さを、対向ローラの硬さより低くする。 【選択図】図2
PROBLEM TO BE SOLVED: To provide an electromagnetic induction-heating fixing device having a plurality of rollers including a counter roller arranged opposite to a magnetic field generation part, and a belt that is extended between the plurality of rollers, circularly driven between the plurality of rollers, and heated by electromagnetic induction, the fixing device which can suppress variations in heat generation in the fixing belt when a pressing force applied to the plurality of rollers from the fixing belt is changed, without limiting material of the counter roller to a thermosetting resin.SOLUTION: At least one roller other than a counter roller among a plurality of rollers, to which a belt is extended, has a hardness lower than that of the counter roller.

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