Sheet transport device and image forming apparatus

Patent metadata

Field	Value
Publication number	US-2016282783-A1
Application number	US-201514841910-A
Country	US
Kind code	A1
Filing date	Sep 1, 2015
Priority date	Mar 27, 2015
Publication date	Sep 29, 2016
Grant date	—

Abstract

A sheet transport device includes a transport path along which a sheet is transported in one direction; a sheet butting portion against which a side edge of the sheet on the transport path is butted, the sheet butting portion being provided at one side of the transport path; a butting section that moves the sheet toward the one side to butt the side edge against the sheet butting portion; and a sheet rotating section located on the upstream side of the butting section in a sheet transport direction, the sheet rotating section having two sheet transport parts provided so as to be shifted from each other in a direction intersecting the one direction, at least one of the sheet transport parts being configured to have a variable sheet transport speed, the sheet rotating section rotating the sheet by utilizing a difference in transport speed between the two sheet transport parts.

First claim

What is claimed is:

1 . A sheet transport device comprising:
a transport path along which a sheet is transported in one direction; a sheet butting portion against which a side edge of the sheet on the transport path is butted, the sheet butting portion being provided at one side of the transport path; a butting section that moves the sheet on the transport path toward the one side to butt the side edge against the sheet butting portion; and a sheet rotating section located on the upstream side of the butting section in a sheet transport direction, the sheet rotating section having two sheet transport parts provided so as to be shifted from each other in a direction intersecting the one direction, at least one of the sheet transport parts being configured to have a variable sheet transport speed, the sheet rotating section rotating the sheet by utilizing a difference in transport speed between the two sheet transport parts.

2 . The sheet transport device according to claim 1 , wherein, when a basis weight of the sheet is larger than a predetermined basis weight, the sheet rotating section sets an amount of rotation of the sheet to zero or to a value smaller than the amount of rotation of the sheet when the basis weight of the sheet is smaller than the predetermined basis weight.

3 . The sheet transport device according to claim 1 , wherein the sheet rotating section rotates the sheet such that a leading end of the sheet is directed to the other side of the transport path.

4 . The sheet transport device according to claim 2 , wherein the sheet rotating section rotates the sheet such that a leading end of the sheet is directed to the other side of the transport path.

5 . The sheet transport device according to claim 1 , wherein the sheet rotating section sets the sheet transport speed of each of the two sheet transport parts according to a sheet type.

6 . An image forming apparatus comprising:
an image forming section that forms an image on a sheet; a transport path along which a sheet directed to the image forming section passes and along which the sheet is transported in one direction; a sheet butting portion against which a side edge of the sheet on the transport path is butted, the sheet butting portion being provided at one side of the transport path; a butting section that moves the sheet on the transport path toward the one side to butt the side edge against the sheet butting portion; and a sheet rotating section located on the upstream side of the butting section in a sheet transport direction, the sheet rotating section having two sheet transport parts provided so as to be shifted from each other in a direction intersecting the one direction, at least one of the sheet transport parts being configured to have a variable sheet transport speed, the sheet rotating section rotating the sheet by utilizing a difference in transport speed between the two sheet transport parts.

Assignees

• Fuji Xerox Co Ltd

Inventors

• Yamashita Tatsuya
• Watanabe Kiyoshi
• Tanaka Toshitaka
• HAGIHARA Junji
• Chino Yuta

Classifications

• B65H9/04

  Fixed or adjustable stops or gauges (gauge pins B65H9/02) · CPC title

• B65H2301/331

  Skewing, correcting skew, i.e. changing slightly orientation of material · CPC title

• B65H2801/03

  Image reproduction devices · CPC title

• G03G15/6529 Primary

  Transporting (G03G15/6555 takes precedence) · CPC title

• B65H2511/24

  Irregularities, e.g. in orientation or skewness · CPC title