READING DEVICE, IMAGE FORMING APPARATUS INCLUDING THE SAME, AND CONTROL METHOD FOR READING DEVICE

摘要

The reading device includes an image reading unit, a document feeder unit, a table document detection unit for detecting presence or absence of a document on the place-reading contact glass, a document set sensor for detecting setting of the document, a size detection unit for detecting a size of the document on the document tray, and an open/close detection unit for detecting open and close of the document feeder unit. In a determination necessary state in which setting of the document is not detected while an object on the document tray is detected, it is determined to execute feed reading, or to execute place reading, or to be disabled to confirm to execute the place reading or the feed reading, based on whether or not there is a document on the place-reading contact glass and based on history information.

主权项

1. A reading device comprising:
an image reading unit including a place-reading contact glass on which a document to be read is placed and a feed-reading contact glass on which a transported document sheet passes, so as to perform document reading by one of place reading for reading the document placed on the place-reading contact glass and feed reading for reading the transported document sheet; a document feeder unit being capable of opening and closing with respect to the image reading unit, and configured to feed a document sheet set on a document tray and to transport the document sheet to the feed-reading contact glass; a table document detection unit for detecting whether or not there is a document on the place-reading contact glass; a document set sensor for detecting whether or not a document sheet is set on the document tray in such a manner that the document feeder unit can feed the document sheet; a size detection unit for detecting a size of the document sheet set on the document tray; an open/close detection unit for detecting open and close of the document feeder unit; an input unit for accepting an instruction to start the document reading; a notifying unit configured to perform notification; a history storing unit for storing history information about whether or not the document feeder unit is opened and closed in a period after a last document reading job is finished until the instruction to start the document reading is issued based on an output of the open/close detection unit; and a determining unit for detecting whether or not there is a document on the place-reading contact glass based on an output of the table document detection unit, whether or not a document sheet is set on the document tray based on an output of the document set sensor, and a size of an object placed on the document tray based on an output of the size detection unit, and for determining whether to execute the feed reading, or to execute the place reading, or to be disabled to determine to execute the place reading or the feed reading, based on whether or not there is a document on the place-reading contact glass and based on the history information, in a determination necessary state in which the document set sensor does not detect that a document sheet is set on the document tray while the size detection unit detects an object on the document tray.