US 11,835,889 B2
Image forming apparatus
Yoko Miyamoto, Ebina (JP); Takashi Hoshino, Yokohama (JP); Shinji Okuyama, Ebina (JP); Tomoaki Yoshioka, Ebina (JP); Toshiaki Baba, Ebina (JP); and Chihiro Iijima, Yokohama (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Apr. 7, 2022, as Appl. No. 17/715,242.
Application 17/715,242 is a continuation of application No. PCT/JP2020/029609, filed on Aug. 3, 2020.
Claims priority of application No. 2020-030520 (JP), filed on Feb. 26, 2020.
Prior Publication US 2022/0229384 A1, Jul. 21, 2022
Int. Cl. G03G 15/16 (2006.01); G03G 15/01 (2006.01); G03G 15/20 (2006.01); G03G 15/00 (2006.01)
CPC G03G 15/1615 (2013.01) [G03G 15/0131 (2013.01); G03G 15/2007 (2013.01); G03G 15/55 (2013.01); G03G 15/70 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An image forming apparatus, comprising:
a colorant image former;
an intermediate transfer belt configured to hold a colorant image formed by the colorant image former and to be rotationally driven;
a secondary transfer roller configured to transfer the colorant image onto a recording medium, which is transported from an upstream side, by sandwiching the recording medium between the secondary transfer roller and the intermediate transfer belt, and rotationally driving the secondary transfer roller to transport the recording medium to a downstream side;
a cam configured to relatively contact or separate the intermediate transfer belt and the secondary transfer roller by being driven by a motor;
a fixer configured to fix the colorant image on the recording medium on which the colorant image is transferred by the secondary transfer roller, and to be rotationally driven in interlocking with the secondary transfer roller to transport the recording medium to the downstream side;
a transfer cylinder that is provided at the secondary transfer roller;
a fixing cylinder that is provided at the fixer;
a chain that is wound around the transfer cylinder and the fixing cylinder, and configured to rotate in accordance with rotation of the transfer cylinder and the fixing cylinder; and
a gripper that is provided at the chain, and configured to hold a leading end portion of the recording medium, and to transport the recording medium from the transfer cylinder to the fixing cylinder, wherein,
in response to an abnormality being detected, the image forming apparatus operates in a mode in which the cam relatively separates the intermediate transfer belt and the secondary transfer roller, and then rotational driving of the secondary transfer roller is stopped after rotational driving of the intermediate transfer belt is stopped,
rotational driving of the fixer is stopped in interlocking with the secondary transfer roller,
holding of the leading end portion of the recording medium by the gripper is released after the recording medium is transported to the fixing cylinder, and
in the mode, the rotational driving of the secondary transfer roller is stopped after the holding of the recording medium by the gripper is released.