FIXING DEVICE AND IMAGE FORMING APPARATUS

PROBLEM TO BE SOLVED: To provide a fixing device that performs control on the basis of an output from a contact type temperature sensor, the fixing device preventing an increase in standby time and excessive heating of members due to incorrect detection.SOLUTION: There is provided a fixing device in...

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Main Authors ISHIGAYA YASUKO, IKEBUCHI YUTAKA, SHIMOKAWA TOSHIHIKO, YAMAGUCHI YOSHINORI, SAITO KAZUYA, HATTORI YOSHIO, MINBU RYUICHI, SHOJI KEITARO
Format Patent
LanguageEnglish
Japanese
Published 23.05.2016
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To provide a fixing device that performs control on the basis of an output from a contact type temperature sensor, the fixing device preventing an increase in standby time and excessive heating of members due to incorrect detection.SOLUTION: There is provided a fixing device including: a rotatable endless fixing member; a nip forming member that is disposed inside the fixing member; an opposing rotor that is in contact with the nip forming member with the fixing member therebetween to form a nip part with the fixing member; and a heating source that directly heats the fixing member at a portion other than the nip part; and conveying a recording medium carrying an unfixed image to the nip part to fix the unfixed image to the recording medium. The fixing device has temperature detection means in contact with the opposing rotor to measure the temperature of the rotor, and a control part that controls driving means for driving conveying means for conveying the recording medium to the nip part on the basis of a measurement by the temperature detection means, where the control part drivably controls the driving means when the amount of change per unit time of the measurement by the temperature detection means reaches a predetermined threshold.SELECTED DRAWING: Figure 7 【課題】 接触式温度センサの出力に基づいて制御をする定着装置において、誤検知による、待機時間の増加及び部材の過剰な加熱を防止す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部材と、定着部材の内側に配設されたニップ形成部材と、定着部材を介してニップ形成部材と当接することにより定着部材との間にニップ部を形成する対向回転体と、ニップ部以外の箇所で定着部材を直接加熱する加熱源と、ニップ部に、未定着画像を担持した記録媒体を搬送して、記録媒体に未定着画像を定着する定着装置において、対向回転体の温度を、接触して計測する温度検知手段と、温度検知手段の計測値に基づいて、ニップ部へ記録媒体を搬送する搬送手段を駆動する駆動手段を制御する制御部と、を有し、制御部は、温度検知手段の計測値の単位時間当たりの変化量が、所定の閾値に達した場合、駆動手段を駆動可能に制御する。【選択図】図７
Bibliography:Application Number: JP20140222641