Abstract: A drive transmission apparatus includes a sun gear driven by a drive source, a planetary gear, a supporting member that supports the planetary gear capable of revolving around the sun gear in a rotatably engaged state with the sun gear, a driven gear that is engaged with the planetary gear when the planetary gear revolves and moves to an engagement position by the rotation of the sun gear in a first direction, and a rotational force providing unit that provides a rotational force to the driven gear to rotate the sun gear in a second direction opposite to the first direction via the planetary gear when the planetary gear is engaged with the driven gear. When the sun gear is rotated in the second direction by the drive source, the rotational force providing unit blocks the revolution of the planetary gear by rotating the planetary gear via the driven gear.

Abstract: The invention provides an image processing apparatus capable of stopping the transport of a sheet when an access cover is opened to prevent the damage of the sheet, without additionally providing a sensor. An image processing apparatus includes: a transport member for transporting a sheet through an image processing unit; a driving mechanism for transmitting a driving force to the transport member; an access cover for opening a portion of a sheet transport path; and a driving switching unit for transmitting the driving force of the driving mechanism or cuts off the transmission of the driving force in operative association with the opening or closing of the access cover. The driving switching unit cuts off the transmission of the driving force to the transport member when the access cover is opened.

Abstract: An image reading apparatus includes a sheet feeding unit configured to sequentially feed a plurality of documents loaded on a document positioning plate, a reading sensor arranged in a conveyance path configured to read a document of the plurality of documents fed by the sheet feeding unit, an acquisition unit configured to acquire an interval of the document between a trailing edge of a preceding document and a leading edge of a next document conveyed through the conveyance path, and a reading unit configured to execute a first reading mode using the reading sensor to read the document conveyed at a first conveyance speed, and a second reading mode using the reading sensor to read the document conveyed at a second conveyance speed that is lower than the first conveyance speed, wherein the reading unit executes the second reading mode after the first reading mode when the interval of the document is less than a predetermined interval.

Abstract: An image reading apparatus includes a document reading and conveying unit, a pressing plate capable of moving to a position to press a document against a reading surface and to a position withdrawn from the reading surface, and a fixed reader configured to read a document fixed on the reading surface by moving a close-coupled image sensor relative to the document. The document reading and conveying unit includes a controller configured to perform pickup initialization of returning a pickup roller to an initial position after the completion of conveying one or more documents and is supported by the pressure plate. The controller includes a first timer configured to measure an elapsed time from the completion of reading performed by the fixed reader. The controller performs the pickup initialization after a measurement value measured by the first timer exceeds a first time.