公开(公告)号：US09229387B2

公开(公告)日：2016-01-05

申请号：US14658751

申请日：2015-03-16

Applicant: Konica Minolta, Inc.

Inventor： Kosuke Sasaki ,  Kenji Tamaki ,  Masayuki Watanabe ,  Kiyoto Kojima ,  Kenji Izumiya ,  Hiroshi Oyama

IPC: G03G15/20

CPC classification number: G03G15/2039

Abstract: A fixing apparatus included in an image forming apparatus includes a fixing heater that performs heat fixing, a control unit that controls the fixing heater based on control patterns, a temperature sensor that detects temperature of the fixing heater, and a voltage detection unit that detects a voltage that is applied to the fixing heater. In each control pattern, turn-on period of the fixing heater and turn-off period of the fixing heater are set according to a control cycle of a half cycle duty control. The control unit controls the switching unit to turn on or off the fixing heater using a combination of the control patterns each satisfying a standard for preventing a flicker during each control period of time that is integral multiplication of the control cycle according to the temperature of the fixing heater and the voltage value allied to the fixing heater.

Abstract translation: 包括在图像形成装置中的定影装置包括执行热定影的定影加热器，基于控制图案控制定影加热器的控制单元，检测定影加热器的温度的温度传感器，以及检测定影加热器的电压检测单元 施加到定影加热器的电压。 在每个控制模式中，根据半循环占空比控制的控制周期来设定定影加热器的开启周期和定影加热器的关闭周期。 控制单元控制开关单元使用各自满足用于防止在根据控制周期的温度的控制周期的积分乘法的每个控制时段期间的闪烁的控制模式的组合来打开或关闭定影加热器 固定加热器和与定影加热器相关的电压值。

公开(公告)号：US20150160595A1

公开(公告)日：2015-06-11

申请号：US14560327

申请日：2014-12-04

Applicant: Konica Minolta, Inc.

Inventor： Takeshi TAMADA ,  Satoshi Ogata ,  Kenji Izumiya ,  Masatoshi Hitaka

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/55

Abstract: An image forming apparatus performs a serviceman call detection mode during its idling time. In this time, a control portion controls upper and lower pressuring rollers to be clamped, controls a driving motor, and controls a change-over mechanism to switch a braking motor off. A torque detection portion detects a torque value Y of the driving motor at this time. The control portion then controls the upper and lower pressuring rollers to be clamped, controls the driving motor, and controls the change-over mechanism to switch the braking motor on. The torque detection portion detects a torque value Z of the driving motor at this time. The control portion subtracts the torque value Y from the torque value Z to calculate a difference value. The control portion determines that the breaking motor is broken down when the difference value does not exceed the threshold value.

Abstract translation: 图像形成装置在其空转时间期间执行维修人员呼叫检测模式。 此时，控制部控制要被夹紧的上压力辊和下压辊，控制驱动电动机，并控制切换机构以切断制动电动机。 此时，转矩检测部检测驱动电动机的转矩值Y. 然后，控制部控制上下加压辊被夹紧，控制驱动电动机，并控制转换机构，使制动电动机接通。 转矩检测部此时检测驱动电动机的转矩值Z。 控制部从转矩值Z中减去转矩值Y来计算差值。 当差值不超过阈值时，控制部分确定断开电动机被分解。

公开(公告)号：US10054894B2

公开(公告)日：2018-08-21

申请号：US15718932

申请日：2017-09-28

Applicant: Konica Minolta, Inc.

Inventor： Hidenori Mine ,  Kenji Izumiya ,  Satoshi Ogata ,  Kenji Tamaki ,  Hirokatsu Kodama

IPC: B65H9/00 ,  B65H9/14 ,  B65H5/06 ,  G03G15/00 ,  B65H7/20 ,  B65H9/16

CPC classification number: G03G15/6561 ,  B65H5/062 ,  B65H7/02 ,  B65H7/20 ,  B65H9/004 ,  B65H9/006 ,  B65H9/166 ,  B65H85/00 ,  B65H2403/92 ,  B65H2511/13 ,  B65H2513/512 ,  B65H2515/704 ,  G03G15/6529 ,  B65H2220/02 ,  B65H2220/01

Abstract: An image forming apparatus that controls to cut off exciting currents supplied to a plurality of motors to drive conveyance roller pairs after a leading end of a paper sheet is brought in contact with a registration roller pair, and, when cutting off the exciting currents, cut off the exciting current for at least one of the motors at a different timing from the other motors.

公开(公告)号：US09335677B2

公开(公告)日：2016-05-10

申请号：US14477745

申请日：2014-09-04

Applicant: KONICA MINOLTA, INC.

Inventor： Satoshi Ogata ,  Takeshi Tamada ,  Kenji Izumiya ,  Hiroshi Oyama ,  Masayuki Watanabe

IPC: G03G21/00 ,  G03G15/20

CPC classification number: G03G15/2017 ,  G03G2215/2045

Abstract: A fixing apparatus comprises a fixing nip width adjustment unit configured to adjust the fixing nip width of a fixing nip portion; a braking force generation motor configured to generate an effective braking force in the direction to hinder rotation of an upper pressure roller; and a control unit configured to perform restore control for rotating the upper pressure roller and a lower pressure roller by driving a drive motor and speed keeping control for keeping the rotational speed of the braking force generation motor no higher than a predetermined speed during the restore control in a non-fixing period in which the fixing nip width adjustment unit is controlled to decrease the fixing nip width smaller than in a fixing period and a braking force is applied to the fixing side member by the braking force generation motor.

Abstract translation: 定影装置包括定影夹持宽度调节单元，其被配置为调整定影夹持部的定影夹持宽度; 制动力产生电动机，其构造成在阻止上压辊的旋转的方向上产生有效的制动力; 以及控制单元，其被配置为执行恢复控制，以通过驱动驱动电机来旋转上压力辊和下压力辊，并且在恢复控制期间保持用于将制动力发电电动机的转速保持在预定速度以上的速度保持控制 在定影夹持宽度调节单元被控制以使定影夹持宽度小于定影周期的非固定时段中，并且制动力产生马达对固定侧构件施加制动力。