An image forming apparatus comprises a tray, a conveyor, a detector and a movement mechanism. The tray accommodates at least one document. The conveyor conveys the document placed on the tray. The detector detects that the document is placed on the tray. The movement mechanism moves the tray from a first position to a second position closer to the conveyor than the first position based on the detection that the document is placed on the tray, and after moving the tray from the first position to the second position, moves the tray to the first position based on a setting of a mixed stacking mode in which mixing of the documents with different sizes on the tray is permitted.

A document feeding device 10 of an image forming apparatus 1 includes a housing 14 that houses a document conveyance mechanism 15, and a document set tray 16. An upper cover 12 of the housing 14 is openable and closable with respect to a fixed cover 11, and the document set tray 16 is swingably supported. A closed position of the upper cover 12 with respect to the fixed cover 11 is set to a position overlapping with a movement trajectory M of the document set tray 16 during a swinging operation, and it is possible to open the upper cover 12 in connection with the swinging operation of the document set tray 16.

A recording apparatus includes: an apparatus main body having a recording unit that performs recording onto a recording medium; and a document reading mechanism unit having a reading unit that reads a document and a document transport unit that transports a document to the reading unit, the document reading mechanism unit being provided in an upper part of the apparatus main body, wherein the apparatus main body includes: a feed roller that feeds the recording medium toward the front of the apparatus; and a frame having a frame surface intersecting the horizontal direction, the frame being located between the feed roller and the recording unit in an apparatus depth direction, and a part of the document reading mechanism unit overlaps the feed roller in the apparatus depth direction, and overlaps the frame in the vertical direction.

A drive motor drives conveyance rollers. A controller generates a control signal to control the drive motor based on information indicating a rotational speed of the drive motor. The controller generates an initial control signal to drive the conveyance rollers since before conveyance of a sheet by the conveyance rollers and acquires a characteristic value of the initial control signal as a reference value. While the conveyance rollers are conveying the sheet, the controller performs determination processing to determine whether or not to stop the drive motor driving the conveyance rollers based on the characteristic value of the control signal and the reference value.

In a scanner, a medium transport apparatus includes an apparatus main body including a medium transport path from a supply unit, which supplies a medium, to a discharge unit, which discharges the medium, a switcher that switches an attitude of the apparatus main body with respect to a mounting surface on which the apparatus main body is mounted, and a controller that, when the attitude of the apparatus main body with respect to the mounting surface is switched, performs control in accordance with the attitude after the switching.

A sheet feeding device includes a stacking tray, a feeding portion, a first restricting member which includes a first restricting surface and a first supporting portion, a second restricting member which includes a second restricting surface and a second supporting portion, and an interrelating portion. In a state in which the first restricting surface and the second restricting surface are brought closest to each other, a part of the first restricting portion is positioned on a second restricting surface side with respect to a center line of the stacking tray, and a part of the second restricting portion is positioned on a first restricting surface side with respect to the center line.

An image forming apparatus includes a scanner device and an image forming apparatus body to which the scanner device is attached. The scanner device has a document inlet and a document outlet respectively formed in mutually opposed surfaces thereof, and is configured to read an image of a document fed thereinto through the document inlet and discharge the document through the document outlet. The scanner device is detachably attached to a top surface of the image forming apparatus body. The top surface of the image forming apparatus body functions as a guide surface guiding the document when the scanner device is used.

An image processing apparatus includes: a memory configured to store a machine-learned model produced by performing machine learning using teaching data associating image data generated by reading a document by an image reading device with device abnormality information on abnormality of the image reading device; and when the image reading device reads a document, a processor configured to obtain the device abnormality information based on generated image data and the machine-learned model.

An image reading device reads two types of documents, a first document having a first size and a second document having a second size larger than the first size. A controller of the device causes the first document reader to read the first document and generate image data when the operation unit accepts a command. The first document reader reads a portion of the second document and generates image data on tilt of the second document when the operation unit accepts a command. The document tilt detector detects tilt of the second document based on the image data for detecting tilt of the second document. The document transporter stops transport of the second document when the document tilt detector detects tilt of the second document. The second document reader reads the second document and generates image data when the document tilt detector detects no tilt of the second document.

A sheet conveying apparatus includes: a casing provided with a first conveying path and a second conveying path; a first feeding tray provided in the casing and having a first supporting surface that supports a sheet; a supporting member that supports the first feeding tray from below in the casing; a first feeding section provided above the first supporting surface; a first guide member having a first guide surface to guide the sheet fed from the first feeding tray; a second feeding tray provided below the supporting member in the casing and having a second supporting surface that supports a different sheet; a second feeding section provided above the second supporting surface; a second guide member having a second guide surface to guide the different sheet fed from the second feeding tray; and a frame made of metal and being installed on a lower surface of the supporting member.