Image reading and forming apparatus with document width detection based on document press position, elapsed time, and reading instruction

Abstract

An image reading apparatus includes an image reading unit, a document pressing unit, a first position detection unit, a second position detection unit, and a controller. The image reading unit reads an image of a document. The document pressing unit presses the document against a document placement component. The first position detection unit detects a first closed position at which the document pressing unit is not in contact with the document placement component. The second position detection unit detects a second closed position that is closer to the document placement component than the first closed position is. The controller performs first width detection on the document and further performs second width detection. The first width detection is performed in accordance with detection performed by the first position detection unit on a closing operation of the document pressing unit. The second width detection is performed after elapse of a predetermined time in accordance with detection performed by the second position detection unit on the closing operation of the document pressing unit. If the controller receives an image reading instruction before the elapse of the predetermined time, the controller performs the second width detection without waiting for the elapse of the predetermined time and starts an image reading process.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2018-128814 filed Jul. 6, 2018.BACKGROUND(i) Technical Field[0002]The present disclosure relates to an image reading apparatus and an image forming apparatus.(ii) Related Art[0003]An image reading apparatus including a document pressing unit, a light source unit, an imaging unit, and a width detection unit is known (Japanese Unexamined Patent Application Publication No. 2001-066711). The document pressing unit covers a stationary document reading unit on which a document is placed. The light source unit travels under the stationary document reading unit. The light source unit is used for exposing the document placed on the stationary document reading unit to light in a scanning manner, with the stationary document reading unit placed between the document and the light source unit. The imaging unit reads an image of the document by receiv...

AI Technical Summary

Benefits of technology

[0005]It is an object of the present disclosure to provide an image reading apparatus and an image forming apparatus that enable detection accuracy in second width detection to be enhanced compared with a configuration in which a second width detection operation is performed after the elapse of a predetermined time from the detection of a closing operation by a document pressing unit.

Problems solved by technology

However, aspects of the non-limiting embodiments are not required to address the advantages described above, and aspects of the non-limiting embodiments of the present disclosure may not address advantages described above.

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