FIXING DEVICE AND IMAGE FORMING APPARATUS

To provide a fixing device that comprises an endless fixing belt with a reduced heat capacity, and can prevent adhesion of toner dirt to a surface of the belt without providing a cleaning mechanism.SOLUTION: A fixing device comprises, in a housing 40: a rotatable endless fixing belt 21; a nip forming member 24; a support member 25 that supports the nip forming member 24; an opposing rotating body 22 that forms a nip part N with the fixing belt 21; and a heat source 23 that heats the fixing belt 21, and the fixing device has an inlet guide member 42 that guides a recording medium P to the nip part N in an inlet opening 41 through which the recording medium P is carried in, and conveys the recording medium P carrying an unfixed image T to the nip part N to fix the unfixed image T to the recording medium P. The fixing device further comprises: air current generation means that generates an air current on the inside of the housing 40; and an air guide member that guides the air current F2 toward the inlet opening 41. The fixing device generates the flow of air F3 in the inlet opening 41 in a direction different from a conveyance direction D of the recording medium P.SELECTED DRAWING: Figure 3 【課題】低熱容量化された無端状の定着ベルトを備える構成において、クリーニング機構を設けることなく、ベルト表面のトナー汚れの固着を防止することができる定着装置を提供する。【解決手段】回転可能な無端状の定着ベルト２１と、ニップ形成部材２４と、ニップ形成部材２４を支持する支持部材２５と、定着ベルト２１との間にニップ部Ｎを形成する対向回転体２２と、定着ベルト２１を加熱する加熱源２３と、を筐体４０内に備え、記録媒体Ｐが搬入される入口開口部４１に、記録媒体Ｐをニップ部Ｎへ導く入口ガイド部材４１を有し、ニップ部Ｎに未定着画像Ｔを担持した記録媒体Ｐを搬送して、当該記録媒体Ｐに未定着画像Ｔを定着する定着装置において、筐体４０の内部に気流を発生させる気流発生手段と、気流Ｆ２を入口開口部４１に向けて案内する導風部材と、をさらに備え、入口開口部４１に、記録媒体Ｐの搬送方向Ｄと異なる方向に空気の流れＦ３を生成する。【選択図】図３