Paper ejection device and image forming apparatus

摘要

A paper ejection device holds paper ejected out from an upstream device through a paper-ejection opening of the upstream device. The paper ejection device includes: a pair of side fences arranged parallel and perpendicularly to a paper ejection direction, the paper ejection direction being a direction in which paper is ejected through the paper-ejection opening, to restrict positions of edges of the ejected paper in a width direction; and a control unit that, when an ejection speed at which the paper is ejected through the paper-ejection opening is higher than a predetermined speed, controls spacing between the pair of side fences to be narrower than spacing between the pair of side fences for paper ejected at a speed equal to or lower than the predetermined speed.

主权项

1. A paper ejection device for holding paper ejected out from an upstream device through a paper-ejection opening of the upstream device, the paper ejection device comprising:
a pair of side fences arranged parallel to a paper ejection direction, the paper ejection direction being a direction in which paper is ejected through the paper-ejection opening, to restrict positions of edges of the ejected paper in a width direction; an environmental-temperature-and-humidity detector that detects an environmental temperature and humidity; and a control unit that, when an ejection speed, obtained by an ejection speed detector, at which the paper is ejected through the paper-ejection opening is higher than a set speed, controls spacing between the pair of side fences to be narrower than spacing between the pair of side fences for paper ejected at a speed equal to or lower than the set speed, and the control unit further changes the spacing between the pair of side fences depending on the environmental temperature and humidity detected by the environmental-temperature-and-humidity detector.