JP2010130078A - Image reading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image reading apparatus capable of realizing miniaturization of the apparatus.
A stationary document reading unit that reads an image of a still document and a transported document reading unit that reads an image of a transported document, a reading unit for reading the image of the document, and a transport device for transporting the document In the image reading apparatus comprising transport means, a size index sheet for the stationary document, and a transparent film member for guiding the transported document to the pressure plate side that opens and closes in the transported document reading unit, the transported document reading unit and the stationary document The document reading unit is partitioned by a size indicator sheet.
[Selection] Figure 2

Description

  The present invention relates to an image reading apparatus capable of reading an image of a stationary document and an image of a transported document, and an image forming apparatus using the image reading apparatus.

In a conventional image forming apparatus such as a copying machine, a facsimile, or an image reading apparatus such as a scanner, as shown in FIG. It was done at 25. (For example, refer to Patent Document 1.)
Japanese Patent Laid-Open No. 2003-46722

  However, in the case of the configuration as described above, since the guide member 25 is thick, the guide member 25 cannot be brought close to the reading line L2 of the conveyed document reading unit, resulting in a problem that the apparatus width becomes large.

  Therefore, the present invention has been made in view of such a current situation, and an object thereof is to provide an image reading apparatus capable of realizing downsizing of the apparatus.

  An image reading apparatus according to the present invention includes a stationary document reading unit that reads an image of a stationary document, a transported document reading unit that reads an image of a transported document, a reading unit that reads the image of the document, and a mechanism for transporting the document In the image reading apparatus comprising: a conveying means; a size index sheet for the stationary document; and a transparent film member that guides the conveyed document to a pressure plate side that opens and closes in the conveyed document reading unit. The reading unit is partitioned by a size indicator sheet.

  According to the first aspect of the present invention, it is possible to reduce the size of the apparatus.

  Next, details of the present invention will be described in accordance with the description of the embodiments.

  Embodiments of an image reading apparatus to which the present invention is applied will be specifically described below with reference to the drawings. 1 is an upper perspective view of the image reading apparatus, FIG. 2 is an upper perspective view of the image reading apparatus in a state where the pressure plate unit is opened, FIG. 3 is a main cross-sectional view showing the automatic feeding reading apparatus, and FIG. 4 is an automatic feeding reading apparatus. FIG.

  As shown in FIGS. 1 and 2, a white background plate 2 is attached to the still image reading unit on the lower surface of the pressure plate unit 1 so that the document D 2 is brought into close contact with the platen glass 6 when the still image document is read. The pressure plate unit 1 can be opened and closed as the center of rotation.

  As shown in FIGS. 1 and 3, the transport document reading unit 5 has a substantially U-shaped document transport path (hereinafter referred to as a U-turn path) 7, and the U-turn path 7 includes separation rollers 8 and Separation pad 9, preliminary conveyance member 10 in contact with separation roller 8, document presence / absence sensor 11 for detecting presence / absence of document D1, transport roller 13 and paper discharge roller pair 14 for transporting document D1, and leading edge of document D1 The document edge sensor 15 and the like for detecting the front and rear end portions are attached.

  The contact image sensor 16 irradiates the image information surface of the document D1 with light from an LED array as a light source, and forms an image of reflected light reflected by the image information surface on a sensor element with a SELFOC (registered trademark) lens. Is read.

  In the transported document reading unit 5, when the operator places the document D1 on the document tray 4, the document is set from the front side of the apparatus with the read image surface of the document D1 facing upward. At this time, the presence / absence of the document D1 is detected by the document presence / absence sensor 11.

  Then, when the operator instructs the start of reading from the operation unit 12, a driving unit (not shown) rotates, and the document D1 is conveyed to the separation unit of the separation roller 8 and the separation pad 9 by the preliminary conveyance member 10, and the document D1 is conveyed. The uppermost document D1 is separated and conveyed one by one. Further, the separated document D1 is conveyed along the U-turn path 7 by the conveying roller 13 and further conveyed to the reading unit of the contact image sensor 16.

  When the leading edge of the document D1 is detected by the document edge sensor 15 in the document transport unit, reading of image information by the contact image sensor 16 is started when a predetermined amount is transported from that position.

  Here, FIG. 4 is an enlarged view of a portion X of the conveyed document reading unit 5 of FIG. A pressing means 20 for pressing the document against the platen glass 6 is provided above the contact image sensor 16. Further, a transparent sheet member 18 is provided between the pressing means 20 and the platen glass 6 for delivering the document from the platen glass 6 to the downstream guide member 19. Therefore, the image of the document is read through the platen glass 6 and the transparent sheet member 18.

  After the reading is started, the document goes to the paper discharge roller pair 14.

  When the trailing edge of the document D1 is detected by the document edge sensor 15, reading of the image information by the contact image sensor 16 is finished when a predetermined amount is conveyed from the position. Then, the document D1 is discharged out of the apparatus by the paper discharge roller pair 14.

  In this manner, the transported document reading unit 5 repeats the above-described reading operation until the document presence / absence sensor 11 detects that there is no document.

  Next, the position of the size index of the stationary document, which is a feature of the present invention, will be described with reference to FIGS.

  2 are composed of a single platen glass. The A part is a transported original reading part and the B part is a stationary original reading part. Here, the transported document reading unit A and the stationary document reading unit B are partitioned by a size indicator sheet 19. The stationary document D2 is set against the side surface of the size index sheet 19 and the image is read. Here, the size index 21 of the stationary document is provided on the 19a surface of the downstream guide member 19. Further, the size index 21 is covered with a transparent sheet member 18 to protect it from contamination due to the conveyed document.

  As described above, by separating the conveyed document reading unit A and the stationary document reading unit B by the size index sheet 19 of the stationary document, the size index sheet 19 can be brought close to the reading line L, and the width of the apparatus is reduced. Is possible.

1 is an upper perspective view of an image reading apparatus according to the present invention. FIG. 3 is an upper perspective view of the image reading apparatus of the present invention with the pressure plate unit opened. It is principal sectional drawing which shows the automatic feeding reading apparatus of this invention. FIG. 4 is a partially enlarged view of FIG. 3. This is a conventional example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pressure plate unit 2 White base plate 5 Conveyance original reading part 6 Platen glass 16 Contact-type image sensor 18 Transparent sheet member 19 Size indicator sheet 20 Pressing means

Claims (1)

A stationary document reading unit that reads an image of a stationary document, a transported document reading unit that reads an image of a transported document, a reading unit that reads an image of the document, a transporting unit that transports the document, and the stationary document An image reading apparatus comprising: a size indicator sheet; and a transparent film member that guides the transported document to a pressure plate side that opens and closes in the transported document reading unit.
An image reading apparatus, wherein the transported document reading unit and the stationary document reading unit are partitioned by a size index sheet.

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