Sheet conveyance apparatus, tray unit and discharge tray

A tray unit comprising:

• a feed tray;
• and
• a discharge tray provided on the feed tray,
• wherein the discharge tray includes:
• a first tray which has a first rail section, a second rail section, and a third rail section arranged at different positions respectively in a widthwise direction of the discharge tray and each extending in a discharge direction perpendicular to the widthwise direction;
• and
• a second tray which is arranged on a lower side of the first tray and which is slidably supported by the first rail section, the second rail section and the third rail section between a first position at which a forward end in the discharge direction is covered with the first tray and a second position at which the forward end in the discharge direction is positioned on a downstream side of the first tray in the discharge direction,
• the first rail section and the third rail section are contrary to each other in relation to the positions in the widthwise direction with respect to the second rail section,
• the first rail section has a first rib which extends downwardly along the discharge direction and a first protruding section which protrudes from the first rib in a first direction along the widthwise direction to support the second tray,
• the second rail section has a second rib which extends downwardly along the discharge direction, a second protruding section which protrudes from the second rib in a second direction opposite to the first direction to support the second tray, and a first convex portion which protrudes downwardly from the second protruding section, and
• the second tray has a second convex portion which protrudes upwardly and is engageable with the first convex portion of the second rail section at the second position to disable movement of the second tray in the discharge direction.

A discharge tray comprising:

• a first tray which has a first rail section, a second rail section, and a third rail section arranged at different positions respectively in a widthwise direction of the discharge tray and each extending in a discharge direction perpendicular to the widthwise direction;
• and
• a second tray which is arranged on a lower side of the first tray and which is slidably supported by the first rail section, the second rail section and the third rail section between a first position at which a forward end in the discharge direction is covered with the first tray and a second position at which the forward end in the discharge direction is positioned on a downstream side of the first tray in the discharge direction,
• wherein the first rail section and the third rail section are contrary to each other in relation to the positions in the widthwise direction with respect to the second rail section,
• the first rail section has a first rib which extends downwardly along the discharge direction and a first protruding section which protrudes from the first rib in a first direction along the widthwise direction to support the second tray,
• the second rail section has a second rib which extends downwardly along the discharge direction, a second protruding section which protrudes from the second rib in a second direction opposite to the first direction to support the second tray, and a first convex portion which protrudes downwardly from the second protruding section, and
• the second tray has a second convex portion which protrudes upwardly and is engageable with the first convex portion of the second rail section at the second position to disable movement of the second tray in the discharge direction.