Patent ID: 7320462

Claim:
An automatic document transportation device, comprising: a document tray on which an original document before a scanning process is placed; a transportation roller which transports the original document through a transportation path; a document discharge tray on which the original document after the scanning process is stacked; a pickup roller which picks up the original document placed on the document tray; a pickup arm which supports the pickup roller in a manner that the pickup roller makes contact with or separates from the original document placed on the document tray; a document feed roller which feeds the picked up original document into the transportation path; a cover which is provided on an upper part of a main frame in a manner capable of being swung; a shutter which is provided upstream of the document feed roller and suspended from the cover under a freely swinging state; a stopper which is provided on the pickup arm, stops the swing of the shutter so that the shutter restricts a position of a leading edge of the original document on the document tray when the pickup arm is under a standby state, and releases the stop of the shutter when the pickup arm operates in a direction to make contact with the original document; a shutter releasing mechanism which includes a shaft having a protrusion, wherein the protrusion rushes the pickup arm under the standby state in the direction to make contact with the original document when the shaft rotates; and an operation knob for rotating the shaft.