Patent ID: 9736324
Date: 2017-08-15
CPC Classifications: H04N

Claim:
1. A sheet post-processing device mounted in an image forming apparatus that includes an image reading unit and an image forming unit, the image forming unit being located under the image reading unit with a space therebetween, the image forming apparatus having an opening that is located at a front side thereof and in communication with the space, the sheet post-processing device comprising: a first tray that is located in the space and receives a sheet ejected from the image forming unit; a post-processing unit that is located in the space and performs post-processing to a sheet on the first tray; a transfer member that, after the post-processing is performed to the sheet on the first tray, transfers the sheet toward the front side of the image forming apparatus in a direction perpendicular to a sheet ejection direction in which a sheet is ejected to the first tray from the image forming unit; a second tray that is located on the front side of the image forming apparatus and receives the sheet transferred from the first tray through the opening by the transfer member; wherein the second tray has a sheet placement surface that is inclined downward from the front side of the image forming apparatus to a back side thereof, and on which a sheet transferred by the transfer member is placed, and a regulation member that, when a sheet on the sheet placement surface slips down along the inclination of the sheet placement surface, makes contact with a leading edge of the sheet in a slip direction and thereby regulates the slip of the sheet; a tray moving unit that moves at least one of the first tray and the second tray in an up-and-down direction and changes positions of the first tray and the second tray relative to each other; and a control unit that controls the tray moving unit such that when a sheet ejected from the image forming unit is transported to the first tray, at least a part of a given side edge of a sheet placement surface of the first tray is positioned lower than an upper edge of the regulation member of the second tray, the given side edge being at the front side of the image forming apparatus, and when the sheet is received in the first tray, an entirety of the given side edge of the sheet placement surface of the first tray is positioned higher than or at the same level as the upper edge of the regulation member of the second tray.