JPH07248546A - Original reader - Google Patents

Abstract

PURPOSE:To facilitate the confirmation of the placing position of an original platen and the alignment thereof, to improve workability and to realize image processing corresponding to the kind, the size and the direction of the original. CONSTITUTION:This reader is provided with the transparent original platen 1 for placing the original on it a light source 2 for irradiating the image of the original placed on the original platen 1 with light, a read part for reading reflected light from the image irradiated by the light source 2, a scanning optical part A including a reflection mirror 4, etc., and a sheet member 10 installed on the lower surface of the original platen 1 so as to be adjacent and opposed to all the area of the lower surface, to which enlarging operation and taking-up operation are performed interlocking with the reading operation of the scanning optical part A, and where the size of an index original concerning the original and an index showing the original placing position on the original platen are displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document reading device in an image processing device such as a copying machine.

[0002]

2. Description of the Related Art Conventionally, in a document reading device of an image processing apparatus such as a copying machine, it is necessary to deal with a document of plural kinds of sizes. The standard position, the central part of the standard position, and the standard positions are different.In order to accurately read the entire area of the original, even if it is a standard size, it must be set accurately on the glass as the original placing table. I have to.

Particularly, in an analog type copying machine or the like, when the original is not accurately placed at the reference position, the copied and output image may be misaligned on the output paper and may be partially missing. Usually, a member for the purpose of indicating the size and position of the original is provided around the original placing glass to serve as a guide when placing the original.

[0004]

However, according to the above-described conventional document reading device, various sizes and position information in the vertical and horizontal directions of each size must be written in a limited area around the document mounting glass. However, there is a drawback that it becomes very difficult to see and understand.

Further, even if the size or position information of the manuscript is used,
Especially for small-sized documents, a large distance is created between the position where the document is actually placed and the periphery of the glass where the position information of the document is written. It was necessary to execute copying to perform delicate alignment, and workability was poor.

Therefore, a first object of the present invention is to provide an index (an index of size, placement position, etc.) relating to a document that can be wound in conjunction with the scanning optical unit under a transparent document table, or a grid-like pattern. By providing a sheet member on which lattice lines are displayed, it is possible to easily confirm and position the placement position of the document table and improve workability.

A second object of the present invention is to display an index (an index such as a size and a mounting position) on a document that can be wound up in association with the scanning optical unit under a transparent document table. By providing a sheet member and a document detection unit below the sheet member for detecting the type, size, and orientation of the document placed on the document table, it is possible to perform image processing corresponding to the type, size, and orientation of the document. It is to be.

[0008]

In order to solve the above-mentioned problems, a document reading apparatus according to the present invention includes a transparent document table on which a document is placed, and a document placed on the document table. A light source that irradiates an image with light, a reading unit that reads reflected light from the image emitted from the light source, a scanning optical unit that includes a reflection mirror, and a lower surface of the platen, adjacent to the entire area and facing each other. And a stretching operation and a winding operation are performed in association with the reading operation of the scanning optical unit.
And a sheet member on which an index regarding a document is displayed.

The document reading apparatus according to the present invention is
A transparent manuscript table on which a manuscript is placed, a light source that irradiates an image of the manuscript placed on the manuscript table with light, a reading unit that reads reflected light from the image irradiated from the light source, and a reflection mirror And a scanning optical unit including a scanning optical unit, and the like. The original is provided on the lower surface of the original table so as to be adjacent to the entire area and is adjacent to the original unit. The stretching operation and the winding operation are performed in conjunction with the reading operation of the scanning optical unit. A transparent sheet member on which an index is displayed, an original detection unit that is disposed under the sheet member and detects the type, size, and orientation of the original placed on the original table, and an original detection unit that detects the original It is characterized by having an image processing unit for processing a document image in response to the type, size and orientation of the document.

Further, the document reading apparatus according to the present invention is
A transparent manuscript table on which a manuscript is placed, a light source that irradiates an image of the manuscript placed on the manuscript table with light, a reading unit that reads reflected light from the image irradiated from the light source, and a reflection mirror A scanning optical section including the scanning optical section and the like, and is provided on the lower surface of the original table so as to be adjacent to the entire area of the original table, and the stretching operation and the winding operation are performed in association with the reading operation of the scanning optical section. A transparent sheet member on which a size, an index of a mounting position with respect to the platen and grid lines in a grid shape are displayed, and a type and size of a document placed below the sheet member and placed on the platen. It is characterized by having a document detecting section for detecting a direction and an image processing section for processing a document image in response to the type, size, and direction of the document detected by the document detecting section.

[0011]

According to the above structure, a sheet member is provided on the lower surface of the document table so as to be opposed to and adjacent to the entire area of the document table. By extending and winding the scanning optical unit in conjunction with the reading operation of the scanning optical unit, it becomes easy to confirm the placement position and position when placing the document on the document table, and improve workability.

[0012]

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

(First Embodiment) FIG. 1 is a diagram showing a first embodiment of the present invention and is a diagram schematically showing a configuration in which the present invention is applied to a document reading portion of an analog type copying machine.

In FIG. 1, 1 is a platen glass, 2 is a halogen lamp as a light source, 3 is a reflection shade, 4 is a reflection mirror, 5a to 5c are mirrors, 6 is an optical path, 10 is a roll-up type sheet member, A is a moving scanning optical unit including the halogen lamp 2 and the reflection mirror 4, and B is an image forming unit for performing a well-known electrophotographic process.

One end of the sheet member 10 is fixed to the scanning optical unit A, and the other end is fixed to a shaft biased by a spiral spring in the winding direction (arrow M) shown in the drawing, and the winding is performed. Tension is constantly applied by force, and the tension is applied to the platen glass 1 substantially in parallel.

In a normal copying operation, first, a document is placed on the platen glass 1 with the document surface facing down, and the halogen lamp 2 of the scanning optical unit A emits light in response to an instruction from the copy start key. The entire scanning optical unit moves in the direction of arrow M, the reflected light is guided to the original image by the mirror units 5a to 5c, and the image is irradiated to the image forming unit B.

At this time, the sheet member 10 has one end fixed to the scanning optical unit A and is pulled in the winding direction, so that the sheet member 10 is always wound in parallel with the original glass 1.

FIG. 2 shows a seat member 10 according to the first embodiment.
FIG. 3 is a diagram viewed from directly above a document table.

As shown in FIG. 2, the surface of the sheet member 10 is printed with a pattern serving as a guide when a document is placed. This printed pattern is an ideal document size position for the scanning optical unit A, and is usually a standard pattern such as A system, B system or USLTR system. FIG. 2 shows an example of the A system and the USLTR system. It should be noted that this print pattern can actually be made easy to see by multicolor printing or the like.

(Second Embodiment) Some copying machines using plain paper have a function of automatically detecting the size of a document placed on the platen glass and automatically selecting the copy paper. Some have.

There are roughly two types of methods for automatically detecting an original. One method is a method for performing a prescan for detecting an original, which is mainly used in a digital copying machine. Another method is to arrange a plurality of optical sensors each including a light emitting portion and a light receiving portion under the original platen glass, and detect the type, size, and orientation of the original by the position of the optical sensor that detects the original. It is mainly used for analog type copiers.

FIG. 3 shows a second embodiment of the present invention and is a diagram schematically showing a configuration in which the present invention is applied to a document reading section of an analog type copying machine.

In FIG. 3, the sheet member 10 is made of a material that allows the light of the LED, which is the light emitting portion of the optical sensor for detecting the original, to pass therethrough.

FIG. 4 shows a seat member 10 according to the second embodiment.
FIG. 3 is a diagram viewed from directly above a document table.

A method of detecting an original according to the second embodiment will be described. Reference numerals 11a to 11d each include a light emitting diode 12 (hereinafter, LED) and a photo interrupter 13, and LED1
The light radiated to the document surface from 2 is transmitted through the sheet member 10 and the platen glass 1 and the reflected light returns when there is a document, but the reflected light does not return when there is no document. Then, the size and orientation of the document are specified depending on the presence or absence of the input light of the photo interrupter 13. In the main body of the copying machine, the optimum paper is selected based on the specified information and the image is formed.

In the second embodiment, the document size,
The LED 12 is attached to the sheet member 10 on which the position pattern is printed.
By using a material that transmits the light, it is possible to use the sheet member 10 together with the automatic detection of the document.

As a modification of the second embodiment described above, a method of providing a notch in the sheet member only in a portion corresponding to the irradiation position of the LED of the optical sensor for detecting the original in FIG. 4 can be considered. According to this method, the material of the sheet member does not need to transmit the light of the LED, and there is an advantage that the range of selection of the material for the sheet member is widened.

In addition, when a pattern is printed on a transparent sheet member, the optical sensor and the structural member of the document reading portion can be seen at the same time, which may deteriorate the visibility of the printed pattern itself. In order to prevent this, the sheet member may be made of an opaque member.

When the sheet member is constructed as described above, there is an effect that the visibility of the printed pattern can be secured and the original document can be surely detected.

(Third Embodiment) In the above first and second embodiments, the present invention is applied to an analog type copying machine, but it is naturally possible to apply it to a digital type copying machine. Yes, an example will be described below.

FIG. 5 shows a third embodiment of the present invention and is a diagram schematically showing a configuration in which the present invention is applied to a document reading section of a digital copying machine.

In a digital copying machine, the image information of a document is read by a CCD sensor, subjected to digital processing after A / D conversion, and an image is formed by scanning the image information on a photosensitive drum with a normal laser beam. ing. Therefore, there is an advantage that various image processing functions can be performed in the process of digitally processing the image information. For example, the image centering function, vertical / horizontal scaling function, mosaic processing function, masking processing function, trimming processing function, character recognition function, etc. There is.

Since it has many functions as described above, in the digital copying machine, it is necessary for the user to accurately specify the size and position of the original and place it on the original table.

For example, it is necessary to accurately specify the size and position of an original document and place it on the original platen when a standard photograph is attached to a document image by using the vertical / horizontal scaling function and the image composition function. When opening a position to attach a standard photo to a document image registered in memory in advance and pasting a standard photo that has been scaled vertically and horizontally on it, make sure that it is accurately placed on the platen according to the vertical and horizontal scaling factors and the position of the document image. If you do not put a photo, the document and the photo may overlap.

Therefore, in the digital copying machine,
In addition to the standard sizes of the A system and the B system, it is more preferable to add grid lines in a grid shape on the sheet member.

Further, some digital copying machines have a function of detecting the document size and position by performing prescan before actually reading the data. A sheet member may be used, and the position of the document can be displayed on the operation unit as coordinate information. Therefore, if this coordinate information is used as a guide and set on the grid line of the sheet member, the document alignment can be performed. Can be done easily and reliably.

[0037]

As described above, according to the document reading apparatus of the present invention, the document glass is usually provided by providing the sheet member as the index for setting the document on the lower surface of the document glass of the document table. Since the size of the document, which can be displayed only around the area, can be displayed right below the place where the document is actually placed, even when the user places the document,
It is possible to accurately place the document at a position corresponding to the document size.

As a result, the operability when the original is placed on the original table is improved, and it is possible to prevent erroneous copying or the like due to a mistake in placing the original.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a configuration in which the present invention is applied to a document reading unit of an analog type copying machine according to a first embodiment.

FIG. 2 is a diagram of the sheet member 10 according to the first embodiment viewed from directly above a document table.

FIG. 3 is a diagram schematically showing a configuration in which the present invention is applied to a document reading unit of an analog type copying machine according to a second embodiment.

FIG. 4 is a diagram of a sheet member 10 according to a second embodiment as viewed from directly above a document table.

FIG. 5 is a diagram schematically showing a configuration in which the present invention is applied to a document reading unit of a digital copying machine.

[Explanation of symbols]

 1 original table glass 2 light source (halogen lamp) 3 reflection shade 4 reflection mirror 5a-5c mirror 6 optical path 11a-11d original detection device 12 light emitting element 13 light receiving element 15 CCD line sensor 16 laser light source 17 polygon scanner A scanning optical section B image Forming part

Claims (12)

[Claims] 1. A transparent manuscript table on which a manuscript is placed, a light source for irradiating an image of the manuscript placed on the manuscript table with light, and reading light reflected from the image irradiated by the light source. A scanning optical unit including a reading unit and a reflection mirror, and the lower surface of the document table are provided adjacent to each other so as to face the entire area, and the stretching operation and the winding operation are interlocked with the scanning operation of the scanning optical unit. And a sheet member on which an index regarding a document is displayed. 2. A winding mechanism for performing a stretching operation and a winding operation of the sheet member is provided on the upstream side of the scanning direction when the original image is read by the scanning optical unit. The document reading device according to item 1. 3. The document reading device according to claim 1, wherein the sheet member is made of a transparent material. 4. The document reading device according to claim 1, wherein the sheet member is made of an opaque material. 5. The document reading apparatus according to claim 1, wherein the index displayed on the sheet member is multi-color printed. 6. The document reading device according to claim 1, wherein the index displayed on the sheet member is a size of the document and a position of the document placed on the document table. 7. A transparent manuscript table on which a manuscript is placed, a light source that irradiates an image of the manuscript placed on the manuscript table with light, and a reflected light from the image irradiated by the light source is read. A scanning optical unit including a reading unit and a reflection mirror, and the lower surface of the document table are provided adjacent to each other so as to face the entire area, and the stretching operation and the winding operation are interlocked with the scanning operation of the scanning optical unit. A transparent sheet member on which an index relating to a document is displayed; a document detection unit disposed under the sheet member for detecting the type, size, and orientation of the document placed on the document table; An original reading apparatus having an image processing unit that processes an original image in response to the type, size, and orientation of the original detected by the original detection unit. 8. A winding mechanism for performing a stretching operation and a winding operation of the sheet member is provided on an upstream side of a scanning direction when a document image is read by the scanning optical unit. Item 7. The document reading device according to item 7. 9. The document reading apparatus according to claim 7, wherein the index displayed on the sheet member is a size of the document and a position of the document placed on the document table. 10. The document reading apparatus according to claim 7, wherein the document detecting unit includes a light emitting unit and a light receiving unit of a light emitting diode. 11. The document reading apparatus according to claim 7, wherein a cutout is formed in a portion of the sheet member where the light emitting diode emits light. 12. A transparent manuscript table on which a manuscript is placed, a light source which irradiates an image of the manuscript placed on the manuscript table with light, and a reflected light from the image which is irradiated from the light source is read. A scanning optical unit including a reading unit and a reflection mirror, and the lower surface of the document table are provided adjacent to each other so as to face the entire area, and the stretching operation and the winding operation are interlocked with the scanning operation of the scanning optical unit. The size of the manuscript,
A transparent sheet member on which an index of the placement position of the document with respect to the document table and grid lines in a grid shape are displayed, and the type and size of the document placed below the sheet member and placed on the document table. An original reading device comprising: an original detecting unit that detects the orientation; and an image processing unit that processes an original image in response to the type, size, and orientation of the original detected by the original detecting unit.