公开(公告)号：US20150063851A1

公开(公告)日：2015-03-05

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: 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。

公开(公告)号：US20150063850A1

公开(公告)日：2015-03-05

申请号：US14470375

申请日：2014-08-27

Applicant: KONICA MINOLTA, INC.

Inventor： Takeshi TAMADA ,  Satoshi OGATA ,  Kenji IZUMIYA ,  Hiroshi OYAMA ,  Masayuki WATANABE

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/50

Abstract: A fixing apparatus includes an upper pressure roller, a fixing belt, a lower pressure roller which cooperates with the upper pressure roller and the fixing belt for forming a fixing nip portion which holds and conveys a sheet with a toner image therebetween; a drive motor which rotates the lower pressure roller; a plurality of motors each of which is capable of generating a braking force in the direction to hinder rotation of the upper pressure roller and an assist force in the direction to assist rotation of the upper pressure roller; a torque generation unit which generate an effective braking force in the direction to hinder rotation of the fixing side member as a combination of the braking and assist forces; and a control unit which switches the motor used to generate the braking force among the plurality of motors in accordance with a predetermined condition.

Abstract translation: 定影装置包括上压辊，定影带，与上压辊和定影带配合的下压辊，用于形成定影夹持部分，该定影夹持部分保持并输送具有调色剂图像的片材; 旋转下压辊的驱动马达; 多个电动机中的每一个能够产生阻碍上压辊旋转的方向的制动力和帮助上压辊旋转的方向的辅助力; 扭矩产生单元，其在制动和辅助力的组合时沿阻止固定侧构件的旋转的方向产生有效的制动力; 以及控制单元，其根据预定条件在多个电动机之间切换用于产生制动力的电动机。

公开(公告)号：US20140363185A1

公开(公告)日：2014-12-11

申请号：US14294432

申请日：2014-06-03

Applicant: KONICA MINOLTA, INC.

Inventor： Takeshi TAMADA ,  Kenji IZUMIYA ,  Satoshi OGATA ,  Masahito TAKANO

IPC: G03G15/20

CPC classification number: G03G15/2064 ,  G03G15/2028 ,  G03G2215/2032 ,  G03G2215/2045

Abstract: An image forming apparatus comprises a drive motor configured to rotate the lower pressure roller, a torque generation unit for generating a breaking force in the direction to hinder rotation of a fixing belt in order to adjust the differential speed between the surface speed of the fixing belt and the surface speed of the lower pressure roller 64, and a control unit for adjusting the breaking force generated by the torque generation unit. The control unit adjusts the breaking force generated by the torque generation unit to decrease if the rotational torque of the drive motor is larger than a predetermined target torque, and increase if the rotational torque of the drive motor is smaller than the predetermined target torque.

Abstract translation: 图像形成装置包括：驱动电动机，其构造成使下压辊旋转;转矩产生单元，用于产生在阻碍定影带的旋转的方向上的断裂力，以便调节定影带的表面速度之间的差速 和下压辊64的表面速度，以及用于调节由转矩产生单元产生的断裂力的控制单元。 如果驱动马达的旋转扭矩大于预定目标扭矩，则控制单元调节由转矩产生单元产生的断裂力，如果驱动马达的旋转扭矩小于预定目标扭矩，则调节力降低。