FIXING DEVICE AND IMAGE FORMING APPARATUS

• Main Authors: UTSUNOMIYA KOICHI, IKEFUCHI YUTAKA, HONDA HARUYUKI
• Format: Patent
• Language: English; Japanese
• Published: 21.11.2019
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

To prevent heat deformation of and damage to a member provided inside a fixing belt in the present invention.SOLUTION: A fixing device 6 comprises: an endless fixing belt 18 that is rotatably provided; a pressure roller 19 that applies pressure to an outer peripheral surface of the fixing belt 18; a nip forming member 34 that is provided inside the fixing belt 18 and in contact with the pressure roller 19 with the fixing belt 18 therebetween to form a fixing nip N; and a support member that is provided inside the fixing belt 18 and supports the nip forming member 34. The fixing device further includes a radiation fin 38 that is formed of a member having a higher thermal conductivity than that of the support member and in contact with an end in a width direction of the support member.SELECTED DRAWING: Figure 7 【課題】本発明では、定着ベルトの内側に設けられた部材の熱変形や破損を防止することを課題としている。【解決手段】回転可能に設けられた無端状の定着ベルト１８と、定着ベルト１８の外周面を加圧する加圧ローラ１９と、定着ベルト１８の内側に設けられ、当該定着ベルト１８を介して加圧ローラ１９に当接して定着ニップＮを形成するニップ形成部材３４と、定着ベルト１８の内側に設けられ、ニップ形成部材３４を支持する支持部材とを備えた定着装置６において、支持部材よりも熱伝導率の高い部材によって構成され、当該支持部材の幅方向端部側に当接する放熱フィン３８をさらに備えたものである。【選択図】図７