JP2002189261A - Image reader and image forming device equipped therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image reader and an image forming device equipped therewith where an original is read in a state where it is surely pressed and the position of the original is corrected to a specified read position. SOLUTION: In the case of reading the image of the original 3 placed on an original platen, the original 3 placed on the original platen is pressed by an original cover member 2 provided to open/close with respect to a device main body. An opening part for contact 21 is provided on the member 2 so as to appear, and a user directly touch the pressed original 3 through the opening part 21 in the case of reading the image of the original 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus and an image forming apparatus using the same, and more particularly, to a structure of a pressing member for pressing a document placed on a document table.

[0002]

2. Description of the Related Art Conventionally, an image forming apparatus such as a facsimile apparatus and a copying apparatus has an image reading apparatus for reading an image of a document placed on a document placing table. FIG. 9 is a side view of an image forming apparatus provided with such a conventional image reading apparatus. In FIG. 9, reference numeral 30 denotes an image forming apparatus main body.

In FIG. 1, reference numeral 31 denotes an image reading device provided on an upper portion of an image forming apparatus main body 30, and the image reading device 31 is provided on a document table glass serving as a document table (not shown) provided on the upper surface. The original G is placed on the platen and the image is read. When reading the image, if the original G is lifted from the platen glass, the reading focus is shifted and the original cannot be read. is there.

For this reason, conventionally, a pressing member 32 is rotatably mounted on the upper portion of the image reading device 31, and the document G placed on the platen glass is pressed and fixed by the pressing member 32 against the platen glass. I am trying to do it.

[0005]

However, in such a conventional image reading apparatus, when the original G is pressed by the pressing member 32, when the original G is a book-shaped original, the central portion of the original cannot be pressed firmly. . Note that if the pressing member 32 is pressed strongly to firmly press the center of the book-shaped document, both ends of the document will float. For this reason, it was difficult to read the book-shaped original clearly.

Also, when reading a curled original document,
When the original document is to be pressed by the pressing member 32, the pressing member 32 first comes into contact with the curled portion, so that when the pressing member 32 is closed, the original may be shifted from a predetermined reading position.

Therefore, the present invention has been made in view of such a situation, and an image reading apparatus capable of reliably pressing and reading an original and correcting the position of the original to a predetermined reading position. And an image forming apparatus provided with the same.

[0008]

According to the present invention, there is provided an image reading apparatus for reading an image of a document placed on a document placing table, the image reading apparatus being provided so as to be openable and closable with respect to the apparatus body, and mounted on the document placing table. A holding member for holding the placed document, and a contact opening provided to be able to appear on the holding member and capable of directly contacting the document pressed by the holding member. is there.

The present invention also provides an opening formed at a position of the holding member facing a document placed on the document placing table, and one or more slidable cover members covering the opening. Wherein the contact opening is formed by sliding the cover member.

Further, the present invention is characterized in that the appearance position and size of the contact opening are set according to the sliding direction and the sliding amount of the cover member.

The present invention further comprises an opening formed in the holding member at a position facing the document placed on the document placing table, and a lid covering the opening. Is characterized by appearing by removing the lid.

Further, the present invention is characterized in that there is provided image correction means for removing image information other than the image information of the original from the image information read when reading the image of the original.

Further, the invention is characterized in that the image information other than the image information of the original is image information of a boundary portion between the opening and a pressing member.

According to the present invention, there is provided an image forming apparatus provided with an image reading device, wherein the image reading device is one of the above.

Further, as in the present invention, when reading an image of a document placed on the document placing table, the document is placed on the document placing table by a pressing member which can be opened and closed with respect to the apparatus main body. Hold the original. In addition, a contact opening is provided so as to be able to appear in the pressing member, so that when reading an image of the document, the contact can directly contact the pressed document.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic configuration diagram of an image reading apparatus according to a first embodiment of the present invention and a facsimile apparatus which is an example of an image forming apparatus having the same.

In FIG. 1, reference numeral 100 denotes a facsimile apparatus, 20 denotes a facsimile apparatus main body (hereinafter, referred to as an apparatus main body), and an image reading apparatus 10
1 is provided.

The image reading apparatus 101 reads an image of an original 3 such as an original placed on a platen glass 1a serving as an original placing table and a thick book-shaped original such as a book. The bed scanner 1 presses the original 3 placed on the original platen glass 1a,
The pressure plate 2 is a pressing member provided to be able to open and close (rotate) in the vertical direction.

Note that this flatbed scanner 1 is
Illumination means (not shown) for illuminating the reading surface of the original 3, a selfoc lens (not shown) through which the reflected light from the reading surface of the original 3 passes, and A contact type image sensor 4 including the illustrated image sensor is provided.

The contact image sensor 4 is driven in a sub-scanning direction of the original 3 by a drive mechanism (not shown) in the original stationary reading mode. In addition,
The contact type image sensor 4 is urged to the lower surface of the original table glass 1a, and the distance from the original table glass 1a is always kept constant when moving in the sub-scanning direction by the above-described driving mechanism. Close contact image sensor 4 on glass 1a
The height of the focal position is constant, and a good image without a deviation of the focal position can be obtained.

On the other hand, in FIG. 1, reference numeral 103 denotes an ink jet recording apparatus.
Numeral 3 records information read by the contact type image sensor 4 or information transmitted from another facsimile apparatus on a recording sheet S.

Here, the ink jet recording apparatus 10
Reference numeral 3 denotes a carriage 7 which is slidably driven by a pair of guide shafts 8a and 8b so as to be driven in the lateral direction of the recording paper S by a drive mechanism (not shown), and is exchangeable with respect to the carriage 7. And an attached ink cartridge 9. In the figure, reference numeral 10 denotes an apparatus main body 20.
The platen is fixed to the side and serves as a fixed base for the recording paper S during recording.

In FIG. 1, reference numeral 102 denotes a document feeder for feeding the recording paper S to the ink jet recording apparatus 103, and a storage section for storing the recording paper S in an oblique direction with respect to the apparatus main body 20. 5, a separation feed roller 16 as a separation mechanism, and a feed roller 17 provided with a pressure roller 17a.

Reference numeral 104 denotes a paper discharge unit, which is a main body 2 of the apparatus.
0, a rubber roller 11 driven by a drive unit (not shown), and a pressure contact piece 1 pressed against the rubber roller 11.
2, a document guide 13, a roller 14 configured so as not to affect the recording surface that has not dried sufficiently after ink jet recording, and a paper discharge roller 15.

In the facsimile apparatus 100 configured as described above, when forming an image, the recording paper S stored in the storage section 5 is first separated one by one by the separation feed roller 16 in the direction of arrow B1. After being sent out
Feed roller 17 provided with pressure roller 17a, pressure piece 12
The paper is conveyed to the ink jet recording apparatus 103 by passing between the ink jet recording apparatus 103 and the rubber roller 11.

Next, the ink jet recording apparatus 103
Then, the image is recorded, and thereafter, the image is discharged in the B2 direction from the paper discharge port 6 provided on the front surface of the apparatus main body 20 by the roller 14 and the paper discharge roller 15.

On the other hand, in the drawing, reference numeral 2a denotes a holding plate fixed to the pressing plate 2, and when the pressing plate 2 is closed,
a presses and presses the document 3 on the document table glass 1a. 1b is a flatbed scanner 1
The document table glass 1a is supported by the frame 1b.

Here, as shown in FIG. 2, the pressure plate 2
Two hinges 19a attached to the rotation center shaft 2d,
A document 19 is provided on the apparatus main body 20 (frame 1b) so that it can be opened and closed (rotated) by a predetermined angle with respect to the apparatus main body 20. When reading a document, the user opens the pressure plate 2 to read the document. An original is placed on the surface of the base glass 1a.

The hinges 19a and 19b have a built-in damper mechanism composed of a spring and a cam (not shown). The damper mechanism prevents the pressure plate 2 from dropping under its own weight and closing. In FIG. 1, reference numeral 18 denotes an operation unit including a display unit, an input unit, and the like.

In the present embodiment, the pressure plate 2
Is provided with a contact opening 21 shown in FIG. 3 so that the original can be brought into direct contact with the document 3 placed on the platen glass 1a. For example, even when a book-shaped original is placed on the original platen glass 1a and the pressure plate 2 is closed for reading the original, the contact opening 21 appears so that the center of the original can be pressed. ing.

In this embodiment, an opening 21A is formed in the pressure plate 2 (pressing plate 2a) as shown in the figure, and cover members 22a, 22a are formed in the opening 21A.
b is slidably attached, for example, when reading a book-shaped document, the cover members 22a and 22b are respectively slid in the X direction along the opening 21A so that the contact opening 21 appears. I have.

Further, by adjusting the sliding direction and the sliding amount of the cover members 22a and 22b, the appearance position and size of the contact opening 21 can be set.

Here, each of the cover members 22a, 22
2b are provided with grip portions 23a and 23b, and the cover members 22a and 22b are provided by the grip portions 23a and 23b.
By sliding the b with respect to the pressure plate 2, for example, the position of the contact opening 21 can be adjusted to the center of the book-shaped document.

In this embodiment, the cover members 22a and 22b are slid with respect to the pressure plate 2 as shown in FIG.
There are provided holding portions 24a, 24b for holding the edges 25a, 25b of the opening 21A from above and below, and the cover members 22a, 22b slide while holding the edges 25a, 25b of the opening 21A. It has become.

When the contact opening 21 is maximized, the innermost portions of the holding portions 24a and 24b are in contact with the edges 25a and 25b of the opening 21A. As shown in the figure, the cover members 22a and 22b move above the lower surface of the holding plate 2a, so that the cover members 22a and 22b can slide without contacting the original. Is available.

On the upper surface of the pressure plate 2, notches 26a and 26b are provided as shown in FIGS. 5 and 5, and the cover members 22a and 22b are provided with the notches 26a and 22b.
a, 26b are slid while engaging both ends.

When reading a book-shaped document, for example, the cover plate 22a, 22b is slid by closing the pressure plate 2 thus configured and pressing the book-shaped document, as shown in FIG. A contact opening 21 of an arbitrary size can appear at a position facing the center of the book-shaped original 3 on the pressure plate 2.

The contact opening 21 is thus formed.
Appears, the central part of the book-shaped original 3 can be pushed by hand from above. Further, when the central portion of the book-shaped document 3 is pressed from above, both ends of the document tend to float due to the reaction force, but are pressed by the pressing plate 2a. As a result, the entire document is placed on the platen glass 1a.
The image can be clearly read over the entire document.

On the other hand, when reading a curled original document, if the curled original document is placed on the platen glass and then the pressing plate 2 is closed, as described above, the original document may deviate due to the curl of the pressing plate 2. is there. However, even in this case, the cover members 22a and 22b are slid so that the contact opening 21 appears, and the contact opening 21 corrects the position of the displaced document original to an accurate reading position. Images can be read clearly throughout.

Next, a second embodiment of the present invention will be described.

FIG. 7 is a top view showing the structure of a pressure plate provided in the image reading apparatus according to the present embodiment. In the same figure, reference numeral 28 denotes a lid detachable from the opening 21. The cover 28 is usually attached to the pressure plate 2 so as to cover the opening 21 from above as shown in FIG.

On the other hand, when the book 28 is pressed, for example, or when a curled document is corrected to a predetermined reading position, the cover 28 is used as shown in FIG.
Is to be removed from.

By removing the lid 28 in this manner, the contact opening 21 is opened (appears), and the center of the book-shaped original 3 can be pushed by hand from above, and the shifted original Can be corrected to an accurate reading position. As a result, the entire document can be clearly read.

When the contact plate 21 is normally used without the contact opening 21 appearing on the pressure plate 2, for example, after correcting the original document to an accurate reading position, the cover 28 is attached to close the contact opening 21. In this case, when a document image is read, a portion corresponding to a boundary portion between the contact opening 21 and the pressure plate 2 (pressing plate 2a) is read as image information, and image streaks such as white stripes may occur when recording. is there.

Therefore, in the present embodiment, when that portion is determined and the original is read, the image information other than the image information of the original, that is, the image information relating to the contact opening 21 is read from the read image information. An image correction unit (not shown) for removing by processing is provided to remove image disturbance. This is the same in the first embodiment described above.

In the above description, an ink jet recording type facsimile apparatus has been exemplified as an image forming apparatus using an image reading apparatus. However, the image forming apparatus is not limited to this. It is also possible to use an apparatus using another recording method such as a thermal transfer recording method, and it is naturally possible to use not only a facsimile apparatus but also a copying machine.

[0048]

As described above, according to the present invention, a contact opening is provided so as to be able to appear on a holding member for holding a document placed on a document placing table. The opening allows direct contact with the document being pressed by the pressing member, whereby the document can be reliably pressed and read, and the position of the document can be corrected to a predetermined reading position.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an image reading apparatus according to a first embodiment of the present invention and a facsimile apparatus as an example of an image forming apparatus including the same.

FIG. 2 is a perspective view of the facsimile machine.

FIG. 3 is a top view of a pressure plate of the image reading apparatus.

FIG. 4 is a sectional view taken along line AA of FIG. 4;

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is a diagram illustrating a state in which the image reading apparatus reads a book-shaped original.

FIG. 7 is a top view illustrating a configuration of a pressure plate provided in an image reading apparatus according to a second embodiment of the present invention.

FIG. 8 is a sectional view taken along the line CC in FIG. 7;

FIG. 9 is a side view of an image forming apparatus provided with a conventional image reading device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 flatbed scanner 1a platen glass 2 pressure plate 2a holding plate 3 document 4 image sensor 20 device body 21 contact opening 21A (pressing plate) openings 22a, 22b cover member 28 lid 100 facsimile device 101 image reading device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasuyuki Nakamura 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Yasunori Hashimoto 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon (72) Inventor Masaaki Inde 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Shinichiro Gun 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Ryoji Kanoya 3-3-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Tatsuo Kimura 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Hideaki Nagahara 3-30-2 Shimomaruko, Ota-ku, Tokyo F-term in Canon Inc. (Reference) 2H012 CA01 CA02 CA09 CA10 CB01 CB05 CB12 2H076 BA07 5C072 AA01 BA13 LA04 LA07 UA20 5C076 AA03 BA06

Claims (7)

[Claims] 1. An image reading apparatus for reading an image of a document placed on a document table, comprising: a holding member provided to be openable and closable with respect to an apparatus body, and for pressing a document placed on the document table. And an opening for contact, which is provided so as to be able to appear on the holding member and is capable of directly contacting a document held by the holding member. 2. An image forming apparatus comprising: an opening formed at a position of the pressing member facing a document placed on the document placing table; and one or more slidable cover members covering the opening. 2. The image reading apparatus according to claim 1, wherein the contact opening is formed by sliding the cover member. 3. The image reading apparatus according to claim 1, wherein an appearance position and a size of the contact opening are set in accordance with a sliding direction and a sliding amount of the cover member. 4. An opening formed at a position of the holding member facing a document placed on the document placing table, and a lid covering the opening, wherein the contact opening is provided with the lid. 2. Appearing by removing the body.
The image reading device according to claim 1. 5. The image reading apparatus according to claim 2, further comprising an image correction unit that removes image information other than the image information of the document from the image information read when reading the image of the document. apparatus. 6. The image information other than the image information of the original,
The image reading apparatus according to claim 5, wherein the image information is image information of a boundary portion between the opening and a pressing member. 7. An image forming apparatus provided with an image reading device, wherein the image reading device is the one according to any one of claims 1 to 6.