Document reading device and image forming apparatus

Patent metadata

Field	Value
Publication number	US-2023058921-A1
Application number	US-202217714110-A
Country	US
Kind code	A1
Filing date	Apr 5, 2022
Priority date	Aug 23, 2021
Publication date	Feb 23, 2023
Grant date	—

Abstract

A document reading device includes an imaging unit that images a document, a placing portion that includes a first placing portion and a second placing portion and that has a placing surface on which the document is placed, the placing surface being formed by the first placing portion and the second placing portion, and a detector that detects an edge of the document that is placed on the placing surface by using a color difference or a luminance difference between the placing surface and the document. An end portion of the first placing portion adjacent to the second placing portion extends toward the second placing portion beyond an end portion of the second placing portion adjacent to the first placing portion.

First claim

What is claimed is:

1 . A document reading device comprising:
an imaging unit that images a document; a placing portion that includes a first placing portion and a second placing portion and that has a placing surface on which the document is placed, the placing surface being formed by the first placing portion and the second placing portion; and a detector that detects an edge of the document that is placed on the placing surface by using a color difference or a luminance difference between the placing surface and the document, wherein an end portion of the first placing portion adjacent to the second placing portion extends toward the second placing portion beyond an end portion of the second placing portion adjacent to the first placing portion.

2 . The document reading device according to claim 1 ,
wherein the first placing portion or the second placing portion is disposed on an imaginary straight line that connects a lower edge of an overlapping portion at which the first placing portion and the second placing portion overlap and the imaging unit to each other.

3 . The document reading device according to claim 2 ,
wherein the overlapping portion has a gap that nonlinearly extends from the placing surface to a position below the placing portion when viewed in an intersecting direction that intersects a vertical direction and a direction in which the first placing portion and the second placing portion are arranged.

4 . The document reading device according to claim 1 ,
wherein an overlapping portion at which the first placing portion and the second placing portion overlap in a vertical direction is integrally formed with the placing portion.

5 . The document reading device according to claim 2 ,
wherein the overlapping portion at which the first placing portion and the second placing portion overlap in a vertical direction is integrally formed with the placing portion.

6 . The document reading device according to claim 3 ,
wherein the overlapping portion at which the first placing portion and the second placing portion overlap in a vertical direction is integrally formed with the placing portion.

7 . The document reading device according to claim 1 ,
wherein a color difference or a luminance difference between an overlapping portion at which the first placing portion and the second placing portion overlap in a vertical direction and the placing portion is smaller than a color difference or a luminance difference between the placing portion and the document.

8 . The document reading device according to claim 2 ,
wherein a color difference or a luminance difference between an overlapping portion at which the first placing portion and the second placing portion overlap in a vertical direction and the placing portion is smaller than a color difference or a luminance difference between the placing portion and the document.

9 . The document reading device according to claim 3 ,
wherein a color difference or a luminance difference between an overlapping portion at which the first placing portion and the second placing portion overlap in a vertical direction and the placing portion is smaller than a color difference or a luminance difference between the placing portion and the document.

10 . The document reading device according to claim 4 ,
wherein a color difference or a luminance difference between an overlapping portion at which the first placing portion and the second placing portion overlap in a vertical direction and the placing portion is smaller than a color difference or a luminance difference between the placing portion and the document.

11 . The document reading device according to claim 5 ,
wherein a color difference or a luminance difference between an overlapping portion at which the first placing portion and the second placing portion overlap in a vertical direction and the placing portion is smaller than a color difference or a luminance difference between the placing portion and the document.

12 . The document reading device according to claim 6 ,
wherein a color difference or a luminance difference between an overlapping portion at which the first placing portion and the second placing portion overlap in a vertical direction and the placing portion is smaller than a color difference or a luminance difference between the placing portion and the document.

13 . The document reading device according to claim 1 , further comprising:
a loading portion that is disposed below the placing surface and that enables a plurality of the documents to be loaded thereon; and a reading member that reads a document that is placed on the loading portion while transporting the document.

14 . The document reading device according to claim 2 , further comprising:
a loading portion that is disposed below the placing surface and that enables a plurality of the documents to be loaded thereon; and a reading member that reads a document that is placed on the loading portion while transporting the document.

15 . The document reading device according to claim 13 ,
wherein the reading member transports the document that is placed on the loading portion via an opening that is adjacent to the loading portion in a direction that intersects a vertical direction, and wherein the first placing portion is a covering that covers an upper surface of the reading member.

16 . The document reading device according to claim 15 ,
wherein the second placing portion is capable of moving in the direction with respect to the first placing portion and uncovering an upper surface of the loading portion.

17 . The document reading device according to claim 16 ,
wherein the second placing portion moves with respect to the first placing portion by sliding in the direction.

18 . The document reading device according to claim 15 ,
wherein the covering of the reading member projects from an end surface that faces in the direction and includes a projecting portion that is capable of supporting the second placing portion from below at an overlapping portion at which the first placing portion and the second placing portion overlap in a vertical direction.

19 . An image forming apparatus comprising:
The document reading device according to claim 1 ; and a formation member that forms a copy image of the document that is read by the document reading device.

20 . The image forming apparatus according to claim 19 , further comprising:
a display unit that is disposed between the imaging unit and the placing portion and that displays information about the apparatus in an intersecting direction that intersects a vertical direction and a direction in which the first placing portion and the second placing portion are arranged, wherein the first placing portion or the second placing portion is movable in the direction in which the first placing portion and the second placing portion are arranged.

Assignees

• Fujifilm Business Innovation Corp

Inventors

• Morita Miho
• Kato Naoyuki
• Yamada Kenji
• Noda Satoshi
• Ishikura Kenichi
• Iizuka Takahiro
• Tanaka Hiroyuki
• Hasegawa Shinya
• Tomioka Kota
• Yamakawa Yoichi
• Sato Tomonori
• Nakata Ryusuke
• Koda Kazuyuki
• Adachi Isamu
• Ishida Tomomi
• Kondo Shinnosuke
• Shiokawa Yuya
• Ishihara Daisuke
• Tachibana Kohei
• Ohba Shinichi
• Endo Taisuke

Classifications

• H04N2201/0422

  Media holders, covers, supports, backgrounds; Arrangements to facilitate placing of the medium (H04N2201/0406 - H04N2201/0412, H04N2201/0434 take precedence) · CPC title

• H04N1/195

  the array comprising a two-dimensional [2D] array · CPC title

• H04N1/10 Primary

  using flat picture-bearing surfaces {(H04N1/113, H04N1/195 take precedence)} · CPC title

• H04N1/0405

  Different formats, e.g. A3 and A4 · CPC title

• H04N2201/0094

  Multifunctional device, i.e. a device capable of all of reading, reproducing, copying, facsimile transception, file transception · CPC title