US 12,434,936 B2
Sheet post-processing device and image forming system including same
Terumitsu Noso, Osaka (JP); Keisuke Egawa, Osaka (JP); Yasunori Ueno, Osaka (JP); Seiichi Shirasaki, Osaka (JP); Takehiko Okada, Osaka (JP); Yusuke Takano, Osaka (JP); and Takuya Nishimura, Osaka (JP)
Assigned to KYOCERA Document Solutions Inc., Osaka (JP)
Filed by KYOCERA Document Solutions Inc., Osaka (JP)
Filed on Jan. 3, 2024, as Appl. No. 18/403,107.
Claims priority of application No. 2023-002393 (JP), filed on Jan. 11, 2023.
Prior Publication US 2024/0228216 A1, Jul. 11, 2024
Int. Cl. B65H 31/34 (2006.01); B65H 9/10 (2006.01); B65H 31/02 (2006.01); B65H 31/10 (2006.01); B65H 31/36 (2006.01); B65H 31/38 (2006.01)
CPC B65H 31/34 (2013.01) [B65H 9/106 (2013.01); B65H 31/02 (2013.01); B65H 31/10 (2013.01); B65H 31/36 (2013.01); B65H 31/38 (2013.01); B65H 2404/651 (2013.01); B65H 2404/661 (2013.01); B65H 2801/24 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A sheet post-processing device comprising:
a conveying member configured to convey a sheet;
a processing tray configured to stack a plurality of the sheets carried in by the conveying member in a predetermined carry-in direction;
a processing section configured to perform predetermined post-processing on the sheets placed on the processing tray;
a reference plate configured to abut an end edge of the sheet carried in onto the processing tray, on a downstream side in an alignment direction opposite to the carry-in direction, so as to align the sheet in the carry-in direction;
an alignment member including a paddle holder disposed above the processing tray so as to be supported in a swingable manner in the carry-in direction, and an alignment paddle having a paddle main body supported in a rotatable manner at a swinging end of the paddle holder and at least one paddle part protruding from the paddle main body in a radial direction, so as to move the sheet carried in onto the processing tray in the alignment direction for aiding alignment of the sheets;
a holder drive unit configured to swing the paddle holder, so as to move the alignment paddle in a reciprocating manner between a reference position to separate the paddle part above a top sheet placed on the processing tray and an acting position to allow the paddle part to contact with the top surface of the sheet; and
a control unit configured to control the holder drive unit, wherein
the alignment paddle rotates so that the paddle part contacts with the sheet n1times, n1 being an integer of two or more, during a period after one sheet is carried in onto the processing tray until the alignment in the carry-in direction is completed by the reference plate, and
the control unit sets a second acting position, which is the acting position when the paddle part contacts with the sheet at n1-th time, to be higher than a first acting position, which is the acting position when the paddle part contacts with the sheet at m1-th time, where 1≤m1<n1 holds.