IMAGE FORMING APPARATUS AND ADJUSTMENT METHOD

To provide a technology to ensure paper conveyability and reduce wear of a fixing belt.SOLUTION: On the basis of the value of a current applied to a first motor for rotating a pressure roller that is opposite to a member for fixing arranged on an inner peripheral side of an endless fixing belt and a...

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Bibliographische Detailangaben
Hauptverfasser: YAMAMOTO MINEO, TSUJIHARA KIYOTO, SEKI HIROMASA, TANAKA TOSHIAKI
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a technology to ensure paper conveyability and reduce wear of a fixing belt.SOLUTION: On the basis of the value of a current applied to a first motor for rotating a pressure roller that is opposite to a member for fixing arranged on an inner peripheral side of an endless fixing belt and arranged on an outer peripheral side of the fixing belt, a control unit of an image forming apparatus derives torque for driving the pressure roller. When the torque is larger than predefined reference torque, the control unit controls an adjustment mechanism that adjusts the magnitude of a force of the pressure roller pressing the member for fixing so as to reduce a load based on the torque.SELECTED DRAWING: Figure 4 【課題】用紙の搬送性を確保すると共に、定着ベルトの摩耗を少なくす技術を提供する。【解決手段】画像形成装置の制御装置は、端状の定着ベルトの内周側に配置された定着用部材に対向し、定着ベルトの外周側に配置された加圧ローラーを回転させる第1モーターに印加される電流値に基づいて、加圧ローラーを駆動するトルクを導出する。そして、制御装置は、トルクが予め定められた基準トルクよりも大きい場合に、トルクに基づく荷重が小さくなるように加圧ローラーが定着用部材を押圧する力の大きさを調整する調整機構を制御する。【選択図】図4