Sheet transport device and image forming apparatus

摘要

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.

主权项

1. A sheet transport device comprising:
a transport path configured to transport a sheet in one direction; a sheet butting portion configured to butt against a side edge of the sheet on the transport path,
wherein the sheet butting portion is provided at one side of the transport path; a butting section configured to move 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 an upstream side of the butting section in a sheet transport direction, wherein the sheet rotating section comprises two sheet transport parts provided so as to be shifted from each other in a direction intersecting the one direction, wherein at least one of the sheet transport parts is configured to have a variable sheet transport speed, wherein the sheet rotating section is configured to rotate the sheet by utilizing a difference in transport speed between the two sheet transport parts, and wherein the sheet rotating section is configured to, in response to a basis weight of the sheet being larger than a predetermined basis weight, set an amount of rotation of the sheet to zero or to a value smaller than an amount of rotation of the sheet when the basis weight of the sheet is smaller than the predetermined basis weight.