Patent ID: 8282094

Claim:
A tray which holds documents to be fed, comprising: a document holding portion which holds documents in a stacked state thereon; guide members which are arranged on said document holding portion and separately in a cross direction crossing to a feeding direction of the documents, and movable on said document holding portion in said cross direction; an extending portion which extends from said document holding portion, wherein an extending amount of the extending portion changes with respect to said document holding portion by expanding or contracting in said feeding direction; an adjusting mechanism which decreases the extending amount of said extending portion as a distance between said guide members becomes narrower, and increases the extending amount of said extending portion as the distance between said guide members becomes wider; wherein said adjusting mechanism further comprises: protruding portions which respectively protrude from said movable guide members, and respectively move in said cross direction with movement of said movable guide members; and long linear holes which are respectively formed on said extending portion in said feeding direction diagonally from an outer side toward an inner side in said cross direction, and respectively engage with said protruding portions, wherein the entire shape of each long linear hole is linear; wherein the extending amount of said extending portion changes by moving said protruding portions along said long linear holes in connection with movement of said movable guide members, wherein said extending portion holds a bottom surface of the documents in the stacked state together with said document holding portion, wherein said extending portion is disposed between the guide members and a top surface of the document holding portion where documents are stacked, and wherein the total size of the tray is changed in accordance with the extending amount of the extending portion.