Post-processing apparatus and image forming system incorporating the post-processing apparatus

An image forming system comprising:

• an image forming apparatus to form an image on a medium;
• and
• a post-processing apparatus to execute post-processing on the medium on which the image is formed by the image forming apparatus, the post-processing apparatus comprising:
• a post-processor to execute post-processing on the medium including the image formed by the image forming apparatus;
• an ejector to eject the medium on which the post-processing is executed by the post-processor;
• and
• an ejection tray to hold the medium ejected by the ejector, the ejection tray including:
• a main tray having an upper face inclined downward in an ejection direction;
• and
• a movable tray being rotatably supported by the main tray between a stacking position at which the medium ejected by the ejector remains stacked on the upper face of the main tray and an ejection position at which the medium ejected by the ejector slides along the upper face of the main tray,
• wherein the movable tray includes a support shaft,
• wherein the main tray includes a guide groove supporting the support shaft rotatably, the guide groove supporting the support shaft slidably in an inclination direction of the main tray, and
• wherein the movable tray at the ejection position is to:
• slide toward a root of the main tray to rotate to the stacking position;
• and
• slide toward a distal end of the main tray so that the upper face of the main tray and an upper face of the movable tray continuously extend as a single face.

A post-processing apparatus comprising:

• means for post-processing to execute post-processing on a medium on which an image is formed by an image forming apparatus;
• means for ejecting the medium on which the post-processing is executed by the means for post-processing;
• and
• an ejection tray to hold the medium ejected by the means for ejecting, the ejection tray including:
• a main tray having an upper face inclined downward in an ejection direction;
• and
• a movable tray being rotatably supported by the main tray between a stacking position at which the medium ejected by the means for ejecting remains stacked on the upper face of the main tray and an ejection position at which the medium ejected by the means for ejecting slides along the upper face of the main tray,
• wherein the movable tray includes a support shaft,
• wherein the main tray includes a guide groove supporting the support shaft rotatably, the guide groove supporting the support shaft slidably in an inclination direction of the main tray, and
• wherein the movable tray at the ejection position is to:
• slide toward a root of the main tray to rotate to the stacking position;
• and
• slide toward a distal end of the main tray so that the upper face of the main tray and an upper face of the movable tray continuously extend as a single face.