DOCUMENT READING DEVICE AND IMAGE FORMING APPARATUS PROVIDED WITH SAME

摘要

A document reading device (20) includes: a document conveyance section (6) and a document reading device (5). A conveyed document reading region (161b) has: a document discharge guide (51) arranged downstream of an image reading position (163a) in a document conveyance direction; and a transparent reading sheet (52) provided along a surface of the contact glass (161) and a surface of the document discharge guide (51), the document conveyance section (6) has a reading guide (62) forming a document conveyance path oppositely to the conveyed document reading region (161b), and the reading guide (62) has, on part of a surface opposing the conveyed document reading region (161b), a black reference member (620) optically read by an image reading section (163) for the purpose of correcting black reference data of an image of the document conveyed by the document conveyance section (6) and read by the document reading device (5).

主权项

1. A document reading device comprising:
a document conveyance section individually conveying loaded documents; an image reading section moving in a predefined direction at below a fixed document reading region so as to read an image of the document loaded in a fixed document reading region, the fixed document reading region being one portion of a contact glass, and stopping at a reading position lower than a conveyed document reading region so as to read an image of the document conveyed by the document conveyance section to the conveyed document reading region, the conveyed document reading region being another portion of the contact glass; a document installation guide guiding the document conveyed by the document conveyance section to an area between the conveyed document reading region and a platen member provided above the conveyed document reading region; a document discharge guide being arranged downstream, in a document conveyance direction, of the reading position where the document guided by the document installation guide is read by the image reading section in the conveyed document reading region, the document discharge guide guiding the document in a direction separating the document from a portion of the contact glass as the conveyed document reading region; a transparent reading sheet being provided in a manner such as to link between a surface of the portion of the contact glass as the conveyed document reading region and a surface of the document discharge guide; a black reference member of a black color extending in a main-scanning direction of the image reading section at part of a surface of the platen member opposing the conveyed document reading region; and a black reference correction section, by using correcting black data obtained through reading of the black reference member plate by the image reading section via the transparent reading sheet, correcting black reference data used for shading of the document image acquired through the reading by the image reading section in the conveyed document reading region.