JPH06225079A - Document reader - Google Patents

Abstract

PURPOSE:To provide the document reader whose machine type can be quickly changed in accordance with the request of a user at the time of selling. CONSTITUTION:A scale 25 is arranged in a boundary area E between a document read start position A for copy and a document read position A2 for facsimile on the lower face of a contact glass 1, and a shading correction plate 26 is provided on the lower face of this scale 25, and a cover 27 for facsimile which has a slope part 27a which scoops the document carried to the document read position A2 for facsimile at the time of setting a facsimile type automatic document feeder and a cover 28 for copy which is compatible with the cover 27 for facsimile and has the end part extended to the document read start position A1 for copy on the contact glass 1 at the time of setting a copy type automatic document feeder are provided freely attachably to and detachably from one end side of the contact glass, and the cover 27 or 28 of the reader main body is only replaced with the cover 28 or 27 to change the machine type by replacement of the copy type or facsimile type automatic document feeder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document reading apparatus in which a copying type automatic document feeding apparatus and a facsimile type automatic document feeding apparatus are detachably and removably attached to a reading body having a copying function and a facsimile function. Regarding the device.

[0002]

2. Description of the Related Art Generally, ADFs (automatic document feeders) include, for example, a copy type ADF used in a copying machine and a facsimile type ADF used in a facsimile. Here, there is an image reading apparatus disclosed in Japanese Patent Laid-Open No. 63-46868 as an original reading apparatus equipped with a facsimile type ADF. This is a platen (contact glass) for placing and setting a thick original in an image reading apparatus equipped with a sheet original automatic feeding device (facsimile type ADF) and having a sheet original moving reading mode and a thick original stationary reading mode. At least the sheet document feeding roller is arranged between the sheet document placing and setting position disposed above the sheet and the predetermined sheet document image reading position on the platen, and the sheet document is not inverted during sheet document moving / reading mode and the sheet document is not inverted. The apparatus is configured to be conveyed from the document placing / setting position to the sheet document discharging stacker section via the sheet document image reading position, thereby providing a small-sized and easy-to-use apparatus.

Until now, such a facsimile type ADF and a copying type ADF could be separately mounted in a document reading device of a copying machine or a facsimile, and could be used properly for each purpose such as copying or facsimile.
In recent years, as devices have been compounded, multifunctional devices having both a copying function and a facsimile function have appeared on the market. For example, a digital PPC (Plain Paper Copier) equipped with a document reading device (scanner) using a CCD (Charge Coupled Devices) sensor has been put on the market. This is to convert the image information of a document into a digital signal and send it to the plotter section to reveal the signal in the plotter section. Since this document reading apparatus can also be used for a facsimile, it is used as a PPC. It is generally on the market as a multi-function peripheral that can be used as both a facsimile and a facsimile. However, as the type, a type equipped with a copy type ADF and a facsimile type ADF
There is also a type equipped with a document reading device equipped with a copy type ADF when giving priority to the copying function, and a document reading device equipped with a facsimile type ADF when giving priority to the facsimile function. is there.

FIG. 7 shows an example of a conventional document reading apparatus equipped with a copy type ADF. This document reading device has a contact glass 1 arranged on the upper surface and a reading optical system 5 including a traveling body 2, an imaging lens 3 and a CCD 4 arranged inside, and has a copying function and a facsimile function. The structure is such that a copy-type ADF 7 is attached to the reading main body 6 that is a combination of and. When reading the image information of the sheet-shaped original document 8, a plurality of original documents 8 are inserted and set in the direction of the arrow a on the original platen 9 arranged on the upper part of the ADF 7 with the image surface facing upward, and a start button (not shown). When the () is pressed, first, the ADF 7 separates the originals 8 by the feed roller 10 and the separation belt 11 and conveys them one by one, and further conveys them by the conveyor belt 13 wound around a plurality of rollers 12 and reverses them. Then, the rear end side of the original 8 in the conveying direction is automatically set so as to match the original reading start position A ₁ for copying on the contact glass 1. At this time, the traveling body 2 including the light source 14 and the plurality of mirrors 15 scans in the sub-scanning direction Y, so that the image information of the document is transferred to the CC through the imaging lens 3.
After being read by D4, it is converted into a digital signal. After that, the read document is conveyed by the ADF 7 in the direction of the arrow b by the conveyor belt 13 and the paper discharge roller 16 and is turned over to be discharged onto the document discharge table 17 above the conveyor belt 13. Has become. On the other hand, when reading the image information of a thick original document (not shown) such as a book, the ADF 7 is opened rearward with respect to the reading main body 6 and one end side of the thick original document starts to be read on the contact glass 1. When the carriage 2 is set to the position A ₁ and the start button is pressed, the traveling body 2 similarly scans in the sub-scanning direction Y and the image information of the thick original is read.

FIG. 8 shows an example of a conventional document reading apparatus equipped with a facsimile type ADF. The same parts as those described in FIG. 7 are designated by the same reference numerals. FIG. 8 shows a structure of a document reading device in which a facsimile type ADF 18 is mounted in place of the copy type ADF 7 with respect to the reading main body 6 shown in FIG. 7, and a sheet-shaped document (not shown) is shown. When reading image information, a plurality of originals are set on the original placing table 19 arranged above the ADF 18 with the image surface facing downward, and a start button (not shown) is set.
When is pressed, the documents are separated one by one by the feed roller 20 and the separation belt 21 by the ADF 18, and then are conveyed toward the predetermined facsimile document reading position A ₂ on the contact glass 1 by the conveyance roller 22. . A pressure plate 23 is arranged near the upper part of the original reading position A ₂ for facsimile on the contact glass 1, and the original is pressed by the pressure plate 2.
It moves at a constant speed on the facsimile original reading position A ₂ between the contact glass 3 and the contact glass 1. At this time, the traveling body 2 of the reading main body 6 stands still below the facsimile original reading position A ₂ , and the image information is read by moving the original. After that, the original reading position for facsimile A ₂
The original that has passed above is conveyed in the direction of arrow c by the paper ejection roller 24 and is ejected onto the original ejection tray (not shown). On the other hand, when the image information of a thick original document (not shown) such as a book is read, the ADF 18 is opened rearward with respect to the reading main body 6 so that one end of the thick original document is aligned with the copy original reading start position A _1. By setting and pressing the start button, the running body 2 scans in the sub-scanning direction Y and the image information of the thick original is read. Since this type of original reading device is applied to the facsimile function, a sheet-like original is read from the original placing table 19 to the facsimile original reading position A ₂
When sequentially conveying the originals through the upper portion, the distance between the originals is shortened without reversing the originals to reduce the total required time.

[0006]

However, since the above-mentioned copy type ADF and the facsimile type ADF are so different from each other, in the past, each manufacturer also selected a model according to the ADF type. To produce a multifunction machine. For this reason, the model is decided to be either a model equipped with a copy type ADF or a model equipped with a facsimile type ADF, and the model cannot be changed at the time of sale, and quick response to user requests is possible. could not.

[0007]

According to a first aspect of the present invention, the original is contacted to the reading main body having a contact glass on the upper surface and having a reading optical system inside to combine a copying function and a facsimile function. A copy-type automatic document feeder which scans the reading optical system to read image information of an original by setting the original for copying on a glass at a predetermined reading start position, or a predetermined original on the contact glass. In a document reading apparatus equipped with a facsimile type automatic document feeder for reading image information of a document by the reading optical system in a stationary state while being conveyed to a facsimile document reading position at a predetermined speed, the copying of the lower surface of the contact glass A scale is disposed in the boundary area between the original reading position for facsimile and the original reading position for facsimile, and the scale is provided on the lower surface of the scale. A contact correction plate is provided, and an inclined portion is provided to scoop up an original that has passed the facsimile original reading position when the facsimile type automatic original feeder is attached to the reading main body. A removable facsimile cover is provided, and the end portion is compatible with the facsimile cover when the facsimile type automatic document feeder is detached from the reading main body and the copying type automatic document feeder is attached. A copy cover detachably attached to one end side of the contact glass is provided along the copy original reading start position on the contact glass.

According to the second aspect of the present invention, the original is copied on the contact glass in a predetermined manner on a reading main body having a contact glass on the upper surface thereof and a reading optical system therein to combine a copying function and a facsimile function. Copy-type automatic document feeder that scans the reading optical system to read the image information of a document by setting the document at the document reading start position, or places the document at a predetermined facsimile document reading position on the contact glass. In a document reading device equipped with a facsimile-type automatic document feeding device for reading image information of a document by the reading optical system in a stationary state while being conveyed at a predetermined speed, in the copy document reading start position on the upper surface of the contact glass. A scale is disposed in the boundary area between the facsimile document reading position and the contact glass with respect to the scale. A shading correction plate is disposed in the boundary area on the lower surface, and has an inclined portion for scooping the original document that has passed the facsimile original document reading position when the facsimile type automatic document feeder is mounted on the reading main body. A facsimile cover that is detachably attached to one end of the contact glass is provided, and the facsimile-type automatic document feeder is detached from the reading main body and is compatible with the facsimile cover. A copying cover is removably mounted on one end of the contact glass so that the end of the transportation device is located along the copy original reading start position on the contact glass when the transportation device is mounted.

According to the third aspect of the present invention, the original is copied on the contact glass in a predetermined manner with respect to a reading main body having a contact glass on the upper surface and having a reading optical system therein, which combines a copying function and a facsimile function. Copy-type automatic document feeder that scans the reading optical system to read the image information of a document by setting the document at the document reading start position, or places the document at a predetermined facsimile document reading position on the contact glass. In a document reading device equipped with a facsimile-type automatic document feeding device for reading image information of a document by the reading optical system in a stationary state while being conveyed at a predetermined speed, in the copy document reading start position on the upper surface of the contact glass. A shading correction plate is arranged in a boundary area between the original reading position for facsimile and the shading correction plate is placed on the shading correction plate. It is provided with a kale and has an inclined portion for scooping the original that has passed the original reading position for the facsimile when the facsimile type automatic original conveying device is attached to the reading main body, and is attachable to and detachable from one end side of the contact glass. Is provided with a facsimile cover which is compatible with the facsimile cover. When the facsimile type automatic document feeder is detached from the reading main body and the copying type automatic document feeder is mounted, the end portion is A copy cover detachably attached to one end of the contact glass is provided along the copy original reading start position on the contact glass.

According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, the facsimile cover is provided with an original discharging tray on which an original having passed the facsimile original reading position on the contact glass is discharged. Formed integrally.

[0011]

According to the first aspect of the present invention, by simply replacing the copy cover and the facsimile cover with respect to the same reading main body, a copy-type automatic document feeder can be provided without deteriorating the setting property of the document. Since it is possible to replace the facsimile type automatic document feeder, it is possible to make an option for the copy type and facsimile type automatic document feeders. This makes it possible to quickly respond to user requests at the time of sale. It is possible to easily change the model according to the type of the automatic document feeder. In addition, it is not necessary to manufacture each model as in the past, and parts can be shared.

According to the second aspect of the present invention, the scale is arranged on the upper surface side of the contact glass, so that the automatic document feeder is used especially in a device in which the facsimile type automatic document feeder is attached to the reading main body. Otherwise, for example, the settability of a thick original such as a book is improved, so that the work efficiency can be improved.

According to the third aspect of the present invention, by disposing the shading correction plate on the upper surface side of the contact glass, the shading correction plate is on the same plane as the original, so that the white corrugation depending on the thickness of the contact glass ( It is possible to improve the shading correction performance by removing the influence on the white image).

According to the fourth aspect of the present invention, by forming the document discharge tray integrally with the facsimile cover, the number of parts of the apparatus can be reduced and the cost can be reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. The same parts as those described in FIGS. 7 and 8 are designated by the same reference numerals, and the description thereof will be omitted. Further, the document reading apparatus shown in FIGS. 7 and 8 shows an example in which an ADF (automatic document feeder) for copying 7 or an ADF 18 for facsimile is attached to the same reading main body 6, and therefore the reading is performed. It is assumed that a copy original reading start position A ₁ and a facsimile original reading position A ₂ are set on the contact glass 1 of the main body 6. FIG. 1 shows the structure of the main part of this embodiment. First, as shown in FIG.
A scale 25 is provided in a boundary area E between the copy original reading start position A ₁ and the facsimile original reading position A _{2 on} the lower surface of the scale 25. Characters such as A3, B4, A4 and B5 are printed or attached like decals. A white shading correction plate 26 is attached to the lower surface of the scale 25. Then, the white waveform is sampled with the shading correction plate 26 as a reference, the shading amount for each bit is calculated, and the image density is kept constant even if the illuminance distribution of the illumination system is somewhat poor. The whiteness of the shading correction plate 26 is an important point.

[0016] Here, as shown in FIG. (B), the reading inclined portion 27a of scooping the document that has passed through the facsimile document reading position A ₂ when mounted ADF18 of the facsimile type relative to the body 6 A facsimile cover 27 is detachably attached to one end side of the contact glass 1. Further, as shown in FIG. 2C, the contact cover 1 is compatible with the facsimile cover 27, and when the facsimile type ADF 18 is removed from the reading main body 6 and a copying type ADF 7 is attached. A copying cover 28 that is detachably attached to one end side of the contact glass 1 is provided so as to cover the boundary area E and have an end portion along the copying original reading start position A ₁ . However,
Since the copy cover 28 covers the scale 25 provided on the lower surface of the contact glass 1, a scale is printed on the copy cover 28.
The scale 25 is not used.

In such a structure, when the copy type ADF 7 is attached to the reading main body 6, the copying cover 28 is attached to one end side of the contact glass 1 and the reading main body 6 is attached as shown in FIG. On the other hand, facsimile type ADF
When 18 is attached, as shown in FIG. 3, the facsimile cover 27 is attached to one end of the contact glass 1. As described above, only by exchanging the copy cover 28 and the facsimile cover 27 for the same reading main body 6, the copy type AD can be set without deteriorating the setting property of the original.
Since the F7 and the facsimile type ADF 18 can be exchanged, the copy type and facsimile type ADFs 7, 1
It is possible to make 8 optional. This allows
At the time of sale, I want a model equipped with a copy type ADF7,
ADF7 and ADF respond quickly to user's request such as wanting a model equipped with a facsimile type ADF18.
It is possible to easily change the model simply by exchanging with 18, and a flexible sales channel is secured, and it is possible to improve the sales efficiency of the manufacturer. In addition, since it is not necessary to produce each model as in the conventional case and the parts can be shared, the production efficiency can be improved and the cost can be reduced.

Next, an embodiment of the invention described in claim 2 will be described with reference to FIG. The same parts as those described in FIGS. 1 to 3 are designated by the same reference numerals, and the description thereof will be omitted. In this embodiment, the scale 25 shown in FIG.
Is changed from the lower surface side of the contact glass 1 of the reading main body 6 to the upper surface side. That is, the scale 25 is arranged in the boundary area E between the copy original reading start position A ₁ and the facsimile original reading position A _{2 on} the upper surface of the contact glass 1. A shading correction plate 26 is attached to the boundary area E on the lower surface of the glass 1.

In this case, by disposing the scale 25 on the upper surface side of the contact glass 1, in particular, the reading main body 6
In the document reading apparatus in which the facsimile type ADF 18 is mounted, the thick sheet document such as a book is set at the copy reading start position A ₁ without using the ADF 18, and the embodiment shown in FIG. Compared to the scale 25
Since it is easy to understand, it is possible to improve the setting property of the document and improve the work efficiency.

Next, an embodiment of the invention described in claim 3 will be described with reference to FIG. The same parts as those described in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted. In this embodiment, the shading correction plate 2 shown in FIG.
The arrangement of 6 is changed from the lower surface side of the contact glass 1 of the reading main body 6 to the upper surface side. That is, the shading correction plate 26 is attached to the boundary area E between the copy original reading start position A ₁ and the facsimile original reading position A _{2 on} the upper surface of the contact glass 1, and on the shading correction plate 26. A scale 25 is provided.

In this case, by disposing the shading correction plate 26 on the upper surface side of the contact glass 1, the shading correction plate 26 becomes flush with the original,
It is possible to remove the influence of the thickness of the contact glass 1 on the white waveform (white image) and improve the performance of shading correction. This makes it possible to stabilize the image reading performance.

Next, an embodiment of the invention described in claim 4 will be described with reference to FIG. The same parts as those described in FIGS. 1 to 5 are designated by the same reference numerals, and the description thereof will be omitted. In this embodiment, it is compatible with the copying cover 28 shown in FIGS. 1 to 5, and when the facsimile type ADF 18 is attached to the reading body 6, the facsimile original reading position A ₂ on the contact glass 1 is read. The inclined portion 29a for scooping up the original that has passed through and the original discharge tray 29b for discharging the original that has passed through the facsimile original reading position A ₂ are integrally formed and attached to one end of the contact glass 1. A facsimile cover 29, which is freely attached, is provided.

In this case, since the document delivery tray 29b is integrated with the facsimile cover 29, the number of parts of the apparatus is reduced as compared with the facsimile cover 27 shown in FIGS. It is possible to reduce costs.

[0024]

EFFECTS OF THE INVENTION A document is placed on a predetermined copy document reading start position on the contact glass with respect to a reading main body having a contact glass on the upper surface and having a reading optical system therein and having a combination of a copying function and a facsimile function. A copy-type automatic document feeder that scans the reading optical system to read the image information of a document by carrying and sets it, or conveys a document to a predetermined facsimile document reading position on the contact glass at a predetermined speed. A document reading apparatus equipped with a facsimile type automatic document feeder for reading image information of a document with the reading optical system in a stationary state, according to the invention of claim 1, wherein the copy document on the lower surface of the contact glass is used. A scale is provided in the boundary area between the reading start position and the facsimile document reading position, and shading is performed on the lower surface of the scale. A flat plate is provided, and at the one end side of the contact glass, there is an inclined portion for scooping up the document passed through the facsimile document reading position when the facsimile type automatic document feeder is attached to the reading body. Provided with a detachable facsimile cover,
It is compatible with this facsimile cover, and when the facsimile type automatic document feeder is removed from the reading main body and the copying type automatic document feeder is attached, the end of the reading of the original document for copying on the contact glass is started. Since the copy cover detachably attached to one end side of the contact glass along the position is provided, the original set can be set only by exchanging the copy cover and the facsimile cover with respect to the same reading main body. Since the copy-type automatic document feeder and the facsimile-type automatic document feeder can be replaced without deteriorating the property, the copy-type and facsimile-type automatic document feeders can be made optional. This makes it possible to quickly respond to user requests at the time of sale and easily change the model for each type of automatic document feeder. In addition, it is possible to secure a flexible sales channel to improve sales efficiency, and it becomes unnecessary to manufacture by model as in the past, and parts can be shared, which improves production efficiency. The cost can be reduced.

In this case, according to the second aspect of the present invention, the scale is arranged on the upper surface of the contact glass in the boundary area between the copy original reading start position and the facsimile original reading position. Since the shading correction plate is arranged in the boundary area on the lower surface of the contact glass, especially when the automatic document feeder is not used in a device in which a facsimile type automatic document feeder is attached to the reading main body, for example, The settability of a thick original such as a book is improved, and thus work efficiency can be improved.

According to the third aspect of the present invention, a shading correction plate is provided in the boundary area between the copy original reading start position and the facsimile original reading position on the upper surface of the contact glass, and this shading correction is performed. Since the scale is provided on the plate, the shading correction plate is on the same plane as the original, so the influence of the thickness of the contact glass on the white waveform (white image) can be removed and the performance of shading correction can be improved. Therefore, the image reading performance can be stabilized.

In these inventions, according to the invention described in claim 4, the document cover is formed integrally with the facsimile cover for discharging the document which has passed the facsimile document reading position on the contact glass. Therefore, the number of parts of the device can be reduced, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a partial front view showing an embodiment of the invention described in claim 1. FIG.

FIG. 2 is a vertical cross-sectional front view showing a document reading device equipped with a copy cover.

FIG. 3 is a vertical cross-sectional front view showing a document reading device equipped with a facsimile cover.

FIG. 4 is a partial front view showing an embodiment of the invention as set forth in claim 2;

FIG. 5 is a partial front view showing an embodiment of the invention as set forth in claim 3;

FIG. 6 is a partial front view showing an embodiment of the invention as set forth in claim 4;

FIG. 7 is a vertical sectional front view of a document reading apparatus showing a conventional example.

FIG. 8 is a vertical sectional front view of a document reading apparatus showing another conventional example.

[Explanation of symbols]

1 Contact Glass 5 Reading Optical System 6 Reading Main Body 7 Copy Type Automatic Document Feeding Device 18 Facsimile Type Automatic Document Feeding Device 25 Scale 26 Shading Correction Plate 27 Facsimile Cover 27a Inclined Part 28 Copying Cover 29 Facsimile Cover 29a Inclined Part 29b Document ejection tray A ₁ Copying document reading start position A ₂ Facsimile document reading position E Border area

Claims (4)

[Claims] 1. An original document is placed at a predetermined original reading position for copying on the contact glass with respect to a reading main body having a contact glass on the upper surface and having a reading optical system therein, which combines a copying function and a facsimile function. A copy-type automatic document feeder that scans the reading optical system to read the image information of a document by carrying and sets it, or conveys a document to a predetermined facsimile document reading position on the contact glass at a predetermined speed. Meanwhile, in a document reading apparatus equipped with a facsimile type automatic document feeder for reading image information of a document with the reading optical system in a stationary state, the copying document reading start position and the facsimile document reading position on the lower surface of the contact glass. A scale is arranged in the boundary area between the scanning unit and the shading correction plate on the bottom surface of the scale, and the shading correction plate Then, when the facsimile type automatic document feeder is mounted, the facsimile cover is detachably mounted on one end side of the contact glass, having an inclined portion for scooping the document passed through the facsimile document reading position. Is provided and is compatible with this facsimile cover, and when the facsimile type automatic document feeder is detached from the reading main body and the copy type automatic document feeder is mounted, the end portion is for copying on the contact glass. An original reading device comprising a copy cover detachably attached to one end of the contact glass along the original reading start position. 2. An original document is placed at a predetermined copy original document reading start position on the contact glass with respect to a reading main body having a contact glass on the upper surface and having a reading optical system therein, which combines a copying function and a facsimile function. A copy-type automatic document feeder that scans the reading optical system to read the image information of a document by carrying and sets it, or conveys a document to a predetermined facsimile document reading position on the contact glass at a predetermined speed. Meanwhile, in a document reading apparatus equipped with a facsimile type automatic document feeder for reading image information of a document with the reading optical system in a stationary state, the copying document reading start position and the facsimile document reading position on the upper surface of the contact glass. A scale is arranged in the boundary area between the contact glass and One end of the contact glass is provided with a fading correction plate and has an inclined portion for scooping a document that has passed the facsimile document reading position when the facsimile type automatic document feeder is attached to the reading body. When a facsimile cover that is detachably mounted is provided on the side and the facsimile cover is compatible with the facsimile cover and the facsimile type automatic document feeder is removed from the reading main body, the copying type automatic document feeder is mounted. An original reading device comprising a copy cover detachably attached to one end of the contact glass so that an end portion of the contact glass is located along the reading start position on the contact glass. 3. An original document is placed at a predetermined original reading position for copying on the contact glass with respect to a reading main body having a contact glass on the upper surface and having a reading optical system therein, which combines a copying function and a facsimile function. A copy-type automatic document feeder that scans the reading optical system to read the image information of a document by carrying and sets it, or conveys a document to a predetermined facsimile document reading position on the contact glass at a predetermined speed. Meanwhile, in a document reading apparatus equipped with a facsimile type automatic document feeder for reading image information of a document with the reading optical system in a stationary state, the copying document reading start position and the facsimile document reading position on the upper surface of the contact glass. A shading correction plate is provided in the boundary area between the and, and a scale is provided on the shading correction plate, and the reading is performed. For a facsimile that is detachably attached to one end side of the contact glass with an inclined portion that scoops an original that has passed the original reading position for facsimile when the automatic document feeder of the facsimile type is attached to the main body A cover is provided and is compatible with this facsimile cover. When the facsimile type automatic document feeder is detached from the reading main body and the copying type automatic document feeder is attached, the end portion of the copy on the contact glass is copied. An original reading device comprising a copy cover detachably attached to one end side of the contact glass along the original reading start position. 4. The document cover for a facsimile is integrally formed with a document discharge tray for discharging a document that has passed through the facsimile document reading position on the contact glass. Document reader.