JP2023013270A - Image reading device - Google Patents

Abstract

To prevent a situation where documents in a plurality of different sizes cannot be appropriately read.SOLUTION: An image reading device comprises: conveyance means that conveys documents along a conveyance path; supply means that sequentially supplies one or more documents placed on a document tray to the conveyance path; reading means that reads the documents conveyed in a conveyance direction along the conveyance path; and control means that, when a first mode for sequentially reading a plurality of documents in different sizes placed on the document tray is set as a reading mode, upon detecting jam of the documents, displays information indicating the positions of the plurality of documents in different sizes on the document tray.SELECTED DRAWING: Figure 9

Description

The present invention relates to an image reading apparatus that sequentially reads a plurality of originals of different sizes.

2. Description of the Related Art Conventionally, an image reading apparatus having an automatic document feeder (ADF) is known. Documents placed on the document tray are conveyed one by one by the ADF. A reading unit provided in the image reading device reads an image of a document that is conveyed. The document tray is provided with two tray guides at different positions in the width direction orthogonal to the document feed direction (document transport direction). The two tray guides are configured to be movable in the width direction, and regulate the position of the document placed on the document tray in the width direction. In such an image reading apparatus, the read image read by the reading section may be skewed due to skew of the document, assembly error of the reading section, or the like.

For this reason, Japanese Patent Laid-Open No. 2002-200001 discloses a configuration in which the amount of inclination of the document in the read image is detected based on the read image, and the inclination of the document in the read image is corrected by image processing. In Japanese Patent Application Laid-Open No. 2002-101002, the edge of the document on the leading edge side in the conveying direction is detected from the read image, and the amount of inclination of the document is detected based on the detected edge.

Document sizes include standard sizes such as A3 and A4 defined by ISO 216, JIS P 0138, etc., and non-standard free sizes such as receipts and checks. Japanese Patent Application Laid-Open No. 2002-200002 discloses an image reading device that determines the size of a document.

A plurality of documents of different sizes may be placed on the document tray of the ADF at the same time. In the following description, a reading mode in which a plurality of originals of different sizes are placed together on the original tray of the ADF and the images of these multiple originals are read is referred to as a "mixed loading mode". On the other hand, a reading mode in which one or more documents of the same size are placed on the document tray of the ADF and the images of these documents are read is referred to as "normal mode". The mixed loading mode can be further classified into a "fixed size mixed loading mode" and a "free size mixed loading mode". The "standard size mixed mode" is a reading mode used when each of a plurality of documents of different sizes to be read has a standard size that satisfies a predetermined condition. On the other hand, the "free size mixed mode" is used when at least one free size document is included in a plurality of documents of different sizes to be scanned, or when only standard size documents do not satisfy the above predetermined conditions. mode.

In the standard size mixed mode, the document size that can be mixed is defined as the predetermined condition based on the document width. Document sizes that can be mixed are standard sizes in which the difference in document width is smaller than a predetermined value, such as A3 and A4R, A4 and B5, and the like. FIGS. 1A to 1C are diagrams of the vicinity of the document tray viewed from a direction orthogonal to a plane including the transport direction and the width direction. As shown in FIGS. 1(A) to 1(C), the feed rollers for feeding the document to the transport path are provided in the center region between the tray guides #1 and #2 in the width direction. FIG. 1A shows a state in which two standard-size documents D#1 and D#2, which can be mixed, are placed on the document tray. Note that the document width of the document D#1 is smaller than the document width of the document D#2. In the case of the mixed standard size mode, the user regulates the position of the document D#2 in the width direction with the tray guides #1 and #2 as shown in FIG. A plurality of documents are placed so as to abut against one of the tray guides. The predetermined condition is determined so that the feed roller can feed the document D#1 even when the document is placed on the document tray.

JP 2017-92562 A Japanese Patent Application Laid-Open No. 2001-350225

On the other hand, in the case of the free size mixed mode, the difference in the document widths of the mixed documents can be large. FIG. 1B shows a state in which a document D#3 with a small document width and a document D#4 with a large document width are placed together on the tray. Since there is a large difference between the widths of the two documents, when the documents are placed on the document tray in the same manner as in the standard size mixed mode, the feed roller can feed the document D#3 as shown in FIG. 1B. jams can occur. In addition, as shown in FIG. 1C, when only one end portion of the document D#3 in the width direction is in contact with the feeding roller, the document D#3 is skewed. There is a possibility that the tilt of the read image may exceed the correctable size. As described above, in the case of the mixed size free mode, there is a possibility that the image of the document may not be properly read.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to prevent a plurality of originals of different sizes from being properly read.

According to one aspect of the present invention, an image reading apparatus includes a conveying unit that conveys a document along a conveying path, and a feeding unit that sequentially feeds one or more documents placed on a document tray to the conveying path. and a first mode for sequentially reading a plurality of documents of different sizes placed on the document tray and reading means for reading the documents transported along the transport path in the transport direction are set as the reading modes. and a control means for displaying information indicating placement positions of the plurality of documents of different sizes on the document tray when jam of the documents is detected.

According to the present invention, it is possible to provide an image reading apparatus that prevents a plurality of documents of different sizes from being properly read.

Explanatory drawing of mixed loading mode. 1 is a perspective view of an image reading device according to one embodiment; FIG. 1 is a cross-sectional view of an image reading device according to one embodiment; FIG. FIG. 2 is a functional block diagram showing the control configuration of the image reading apparatus according to one embodiment; FIG. 4 is an explanatory diagram of tilt correction processing according to one embodiment; FIG. 4 is an explanatory diagram of tilt correction processing according to one embodiment; 4 is a flowchart of processing executed by a reader controller in image reading processing according to an embodiment; 4A and 4B are diagrams showing examples of screens displayed on the operation unit; FIG. 4A and 4B are diagrams showing examples of screens displayed on the operation unit; FIG. FIG. 9 is an explanatory diagram of a determination process of a position of a document on the document tray in the width direction; 4 is a flowchart of processing executed by a system controller in image reading processing according to an embodiment; 4A and 4B are diagrams showing examples of screens displayed on the operation unit; FIG.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. In addition, the following embodiments do not limit the invention according to the scope of claims. Although multiple features are described in the embodiments, not all of these multiple features are essential to the invention, and multiple features may be combined arbitrarily. Furthermore, in the accompanying drawings, the same or similar configurations are denoted by the same reference numerals, and redundant description is omitted.

FIG. 2 is a configuration diagram of the image reading apparatus according to this embodiment. The image reading device has a document reading device 100 and an ADF 200 . ADF 200 is connected to document reading apparatus 100 by an opening/closing hinge, and is rotatable with respect to document reading apparatus 100 using the opening/closing hinge as a rotation axis.

FIG. 3 is a cross-sectional view of the image reading device. Documents are placed on the document tray 201 . Feeding roller 205 is moved downward in the drawing so as to come into contact with the document on document tray 201 when the document is fed, and feeds the uppermost document among the one or more documents placed on document tray 201 . It is fed to the transport path 210 . Separation roller 206 is provided to prevent double feeding of documents. The document fed to the transport path 210 is transported to a position facing the glass 105 by rollers provided along the transport path. The front side reading unit 103 has a line sensor having a plurality of light receiving elements provided along the width direction orthogonal to the document conveying direction. The front side reading unit 103 irradiates the document with light through the glass 105 and receives the reflected light with a line sensor, thereby reading an image for one line in the width direction. While the document is passing over the glass 105 , the front side reading unit 103 repeatedly reads the image for one line in the width direction of the document to read the front side image including the entire document.

After reading the surface image, the document passes through the glass 217 and is ejected to the ejection tray 220 . When the back side of the document is also read, the back side reading unit 216 reads the back side image while the document is passing under the glass 217 .

The document tray 201 is provided with a tray guide plate 203 for regulating the position of the placed document in the width direction. Two tray guide plates 203 are provided at different positions in the width direction and are configured to be movable in the width direction. The two tray guide plates 203 are configured so that the center position in the width direction between the two tray guide plates 203 does not change even if the distance in the width direction is changed. The length detection sensor 202 detects whether or not the length of the document placed on the document tray 201 in the transport direction is equal to or greater than a predetermined value. A document presence/absence detection sensor 204 detects whether or not a document is placed on the document tray 201 . A skew detection sensor 208 detects skew of the document. A separation sensor 209 and a read sensor 212 detect the leading edge and the trailing edge of the document on the transport path 210 . The timing at which the lead sensor 212 detects the leading edge of the document and the timing at which the lead sensor 212 detects the trailing edge of the document are used to determine the reading start timing and reading end timing of the document by the front side reading unit 103 and the back side reading unit 216. be done.

Note that the front side reading unit 103 is configured to be movable along the movement guide 102 . For example, when reading an image of a document placed on the platen glass 101 instead of the document fed from the ADF 200, the front side reading unit 103 moves along the movement guide 102 while being placed on the platen glass 101. Scan the image of the scanned document.

Next, the control configuration of the image reading apparatus will be described with reference to FIG. The image reading device has a reader controller 300 and a system controller 320 . The CPU 301 of the reader controller 300 executes programs stored in the ROM 302 to control each member shown in FIG. At that time, the CPU 301 stores data used for control and temporary data in the RAM 303 . In FIG. 4, a sensor 2000 is a general term for the length detection sensor 202, document presence/absence detection sensor 204, skew detection sensor 208, separation sensor 209, and read sensor 212 described in FIG. The width detection unit 313 detects the length in the width direction of the document placed on the document tray 201 based on the positions of the two tray guide plates 203 . A motor 2001 is a general term for one or more motors, and is a drive source for driving each member in FIG. The image processing unit 305 performs various types of correction processing, including tilt correction, on the image data of the front image read by the front surface reading unit 103 and the image data of the back surface image read by the back surface reading unit 216 . The data is stored in image memory 304 . CPU 301 transmits the image data stored in image memory 304 to system controller 320 via communication line 328 . Each functional block of the reader controller 300 can communicate with each other via a bus.

The CPU 321 of the system controller 320 executes programs stored in the ROM 322 to control the reader controller 300 and control communication with external devices. At that time, the CPU 321 stores data used for control and temporary data in the RAM 323 . The image processing unit 324 performs image/file conversion and electronic document processing such as OCR processing on the image data received from the reader controller 300 , and stores the processed image file and document file in the image memory 325 . . The network IF 327 is connected to a network such as a wired or wireless LAN. This network may also be connected to the Internet. Image files and document files stored in the image memory 325 can be transmitted to external devices on the network or the Internet via the network IF 327 . The operation unit 326 provides a user interface for the user to control the image reading device and display the status of the image reading device to the user. Each functional block of the system controller 320 can communicate with each other via a bus.

Next, processing for detecting and correcting the inclination of the document from the front side image read by the front side reading unit 103 will be described. FIG. 5A shows a document used for explanation. The CPU 301 determines the reading start timing and the reading end timing so that the document is included in the front side image in consideration of skewing of the document. FIG. 5B shows a surface image when the original shown in FIG. 5A is read. The image processing unit 305 detects the leading edge of the document from the surface image, and determines the angle θ (tilt amount) between the detected leading edge and the width direction, as shown in FIG. 5C. The image processing unit 305 also determines the position of the reference position of the document in the surface image. In FIG. 5C, the left end of the leading edge is set as a reference position, and the image processing unit 305 determines the position (x0, y0) of the reference position in the surface image. In this example, the width direction and the transport direction are the x-axis direction and the y-axis direction, respectively, and the upper left corner of the surface image is the origin.

The image processing unit 305 rotates the front side image around the reference position so that the leading edge of the document is parallel to the width direction, and further corrects the front side image so that the reference position becomes the origin of the front side image. conduct. FIG. 6 shows the surface image after correction. The image processing unit 305 stores the corrected image data in the image memory 304 .

Next, processing executed by the CPU 301 when reading a document placed on the ADF 200 will be described with reference to FIG. Reading of a document placed on ADF 200 is started when CPU 301 receives a reading instruction from CPU 321 . Note that FIG. 7 shows the reading processing of one document, and the CPU 301 continues the processing of FIG. repeat. Although not shown in FIG. 7, when all the documents placed on the document tray 201 are read (when the document presence/absence detection sensor 204 stops detecting the documents), the CPU 301 notifies the CPU 321 of completion of reading. .

In this embodiment, the user can set either the "fixed size mixed mode" or the "free size mixed mode" via the operation unit 326 as the reading mode when documents of different sizes are placed on the ADF 200. and Both the "fixed size mixed mode" and the "free size mixed mode" are reading modes used when a plurality of originals of different sizes are placed on the original tray 201 and sequentially read. However, in the case of the "standard size mixed loading mode", each of the plurality of documents placed on the document tray 201 has a standard size and is limited to a predetermined combination. On the other hand, the “free size mixed loading mode” is a reading mode used when a plurality of documents placed on the document tray 201 includes at least one free size (non-standard size) document. Furthermore, the "free size mixed loading mode" is a reading mode used when a plurality of originals placed on the original tray 201 are each of a standard size, but a combination different from the predetermined combination is included. Note that standard sizes are standard dimensions (standard sizes) defined by standardization organizations such as ISO, JIS, and ANSI.

FIG. 8 shows an example of a screen that is information displayed on the operation unit 326 by the CPU 321 to allow the user to select the reading mode. As shown in FIG. 8, regarding the "standard size mixed loading mode", the user is notified of information on standard sizes that can be combined. In addition, regarding the standard size mixed loading mode, the user is notified of information indicating that each document should be placed on the document tray 201 with one side parallel to the conveying direction aligned. The user is also notified of information indicating that the document should be placed on the document tray 201 by striking against one of the plates 203. On the other hand, as shown in FIG. should be placed on the document tray 201 so that the center position of the two tray guide plates 203 is aligned with the center position of the two tray guide plates 203, or positioned near the center position of the two tray guide plates 203. Specifically, reference numeral 50 in Fig. 8 denotes a region in the width direction where the feeding roller 205 (see Figs. 1 and 2) is provided, that is, the center of the document tray 201 in the width direction. In the case of the "free size mixed mode", the user is notified that the document should be placed so that the center position of the document in the width direction is positioned within the section of the mark 50 in the width direction. That is, the document is placed so that the central position in the width direction of the document is positioned within the width direction section of the mark 50, that is, the width direction area in which the feeding roller 205 (see FIGS. 1 and 2) is provided. In this embodiment, the feeding roller 205 is provided so that the center of the feeding roller 205 in the width direction coincides with the center of the two tray guide plates 203. The image reading apparatus is configured so that the user can visually recognize the mark 50. The CPU 321 notifies the CPU 301 of the reading mode selected by the user operating the operation unit 326. FIG.

Returning to FIG. 7, the CPU 301 starts conveying the topmost document on the document tray 201 in S10. The CPU 301 determines in S11 whether the read sensor 212 has detected the leading edge of the document. If the read sensor 212 has not detected the leading edge of the document, the CPU 301 determines in S15 whether a predetermined period has elapsed since the start of transport of the document. If the predetermined period has not elapsed since the start of document transport, the CPU 301 repeats the process from S11. On the other hand, if the predetermined period has passed since the start of document transport, the CPU 301 determines that a document jam has occurred, and advances the process to S18.

When the read sensor 212 detects the leading edge of the document in S11, the CPU 301 determines the reading start timing of the front side reading unit 103 based on this detection timing, and when the determined reading start timing comes, the front side reading unit 103 reads the document in S12. to start. After that, the CPU 301 determines whether the read sensor 212 has detected the trailing edge of the document in S13. If the read sensor 212 has not detected the trailing edge of the document, the CPU 301 determines in S16 whether a predetermined period has elapsed since the start of reading the document. The predetermined period of S16 and the predetermined period of S15 are set independently. If the predetermined period has not elapsed since the start of reading the document, the CPU 301 repeats the process from S13. On the other hand, if the predetermined period has passed since the start of reading the document, the CPU 301 determines that a document jam has occurred, causes the front side reading unit 103 to stop reading the document in S17, and then advances the process to S18. .

When the read sensor 212 detects the trailing edge of the document in S13, the CPU 301 determines the reading end timing of the front side reading unit 103 based on the detection timing. finish reading. The image data of the front side image read by the front side reading unit 103 is output to the image processing unit 305, and skew correction and the like are performed.

On the other hand, when the CPU 301 determines that a document jam has occurred (Yes in S15 and S16), the CPU 301 notifies the CPU 321 of read failure in S18. Subsequently, in S19, the CPU 301 determines whether or not the reading mode is the one size fits all mode. If the reading mode is the free size mixed loading mode, in S20 the CPU 301 notifies the CPU 321 to display guidance regarding the document placement method. As a result, the CPU 321 displays guidance as shown in FIG. 9 on the operation unit 326, for example. The screen shown in FIG. 9 shows the user the placement position of the document on the document tray in the free size mixed mode.

For example, if the read sensor 212 is not turned off even after a predetermined period of time has elapsed from the start of reading the document in S16, and the reading fails, the placement position of the document is determined based on the reading result of the front side image that has been read up to that point. is appropriate or not. In this case, if the placement position of the document is appropriate, the processing of S20 may be skipped. FIG. 10 is an explanatory diagram of the process of determining whether or not the placement position of the document is appropriate, and shows a partial area on the front end side of the read surface image. xc in FIG. 10 is the center position of the surface image in the width direction and corresponds to the center position between the document trays 201 in the width direction. x0 in FIG. 10 is the reference position in the width direction of the document, that is, the position of the left end of the leading edge of the document in this example. The CPU 301 determines the document width Wp and the position x0 from the leading edge. Then, the CPU 301 obtains the position xp in the surface image of the central position in the width direction of the document as xp=x0+Wp/2. The CPU 301 obtains the difference between xp and xc. If this difference is larger than a predetermined value, it is assumed that the placement position of the document is not appropriate. For example, if this difference is larger than a predetermined value, the user places all the documents on the document tray 201 against one side of the tray guide plate 203 as in the case of the "mixed size mode". is assumed. Therefore, if the difference is greater than the predetermined value, the correct placement method is displayed to the user in S20. On the other hand, if the difference is not greater than the predetermined value, it is determined that the user has properly placed the document, and in this case the process of S20 is skipped in order to suppress unnecessary notifications.

FIG. 11 shows processing executed by the CPU 321 when reading a document placed on the ADF 200 . In S30, the CPU 321 instructs the CPU 301 to read the document, and in S31, it is determined whether or not the CPU 301 has notified completion of reading. Upon receiving the reading completion notification from the CPU 301, the CPU 321 terminates the processing of FIG. On the other hand, if the reading completion notification has not been received from the CPU 301, the CPU 321 determines in S32 whether or not the CPU 301 has notified that reading has failed. If the reading failure is not notified, the CPU 321 repeats the process from S31. On the other hand, when the CPU 301 notifies of the reading failure, the CPU 321 displays a screen on the operation unit 326 in S33 to notify the user that a jam has occurred and prompt the user to remove the jammed document. . FIG. 12 shows an example of such a screen. Subsequently, the CPU 321 determines whether or not a guidance display notification has been received from the CPU 301 in S34. If the guidance display notification has not been received, the CPU 321 terminates the processing of FIG. On the other hand, when receiving the guidance display notification, the CPU 321 displays, for example, the screen of FIG.

As described above, in the present embodiment, when the user selects one of the mixed loading modes, the image reading apparatus notifies the user of information regarding the placement position of the document on the document tray 201 as shown in FIG. In addition, in the standard size mixed loading mode, information indicating combinations of standard sizes that can be placed is also notified. Then, the image reading apparatus notifies the user of the placement position of the document on the document tray 201 when the image reading fails in the free size mixed loading mode. With this configuration, it is possible to suppress operation errors by the user and prevent read failures from occurring again. That is, it is possible to provide an image reading apparatus that prevents a plurality of documents of different sizes from being properly read. Further, when reading fails after the front side reading unit 103 starts reading, the image reading apparatus can determine whether or not the placement position of the document is appropriate based on the already read front side image. The image reading apparatus displays the placement position of the document on the document tray 201 to the user when it is determined that the placement position of the document is appropriate even if the image reading fails in the free size mixed loading mode. can be skipped. By not notifying the user of the placement position of the document on the document tray 201 when it is determined that the placement position of the document is appropriate, unnecessary display to the user can be suppressed.

Note that in the present embodiment, the reading mode of the image reading apparatus includes the normal mode and the mixed-load mode, and the mixed-load mode further includes the standard size mixed-load mode and the free size mixed-load mode. In addition, the standard size mixed mode and the free size mixed mode differ in the placement position and placement method of the document on the document tray 201 . However, the present invention is not limited to application to image reading apparatuses having such reading modes. For example, the present invention can be applied to an image reading apparatus that uses only one mixed mode when reading a plurality of different size documents without classifying them into a standard size mixed mode and a free size mixed mode. The method of placing documents on the document tray 201 in this mixed mode is the same as in the free size mixed mode of the present embodiment. In this case, the process of S19 in FIG. 7 becomes a process of determining whether the mode is the mixed mode or the normal mode. If the mode is the mixed mode, the process proceeds to S20.

In the present embodiment, it is determined whether or not reading has failed based on the detection result of the read sensor 212, but this is not the only option. For example, it may be determined that reading has failed when the amount of inclination or skew of the document is greater than a predetermined amount. When the amount of inclination of the document is larger than the predetermined amount, the document may be stopped from being conveyed, or may be directly discharged to the outside of the image reading apparatus. When the transport of the document is to be stopped, the user is notified of the placement position on the document tray 201 after the notification of taking out the document (FIG. 12). The amount of inclination of the document may be the detection result of the skew detection sensor 208, or may be the amount of inclination θ used when the image of the document is rotationally corrected.

Also, in the present embodiment, the user is notified of the placement position on the document tray 201 when reading fails in either the standard size mixed mode or the free size mixed mode, but this is not the only option. For example, if scanning fails in the standard size mixed mode, the user is not notified of the placement position on the document tray 201, and if scanning fails in the free size mixed mode, the user is notified of the placement position on the document tray 201. You may

[Other embodiments]
The present invention supplies a program that implements one or more functions of the above-described embodiments to a system or device via a network or a storage medium, and one or more processors in the computer of the system or device reads and executes the program. It can also be realized by processing to It can also be implemented by a circuit (for example, ASIC) that implements one or more functions.

The invention is not limited to the embodiments described above, and various modifications and variations are possible without departing from the spirit and scope of the invention. Accordingly, the claims are appended to make public the scope of the invention.

210: Conveyance path, 200: ADF, 103: front surface reading unit, 300: reader controller, 320: system controller

Claims (11)

a conveying means for conveying a document along a conveying path;
feeding means for sequentially feeding one or more documents placed on a document tray to the transport path;
reading means for reading a document conveyed in the conveying direction along the conveying path;
When the first mode for sequentially reading a plurality of documents of different sizes placed on the document tray is set as the reading mode, when a jam of the document or a tilt of the document larger than a predetermined amount is detected, a control means for displaying information indicating placement positions of the plurality of documents in the document tray;
An image reading device comprising: In the case where the first mode is set, if the reading unit detects a jam of the document or a tilt of the document larger than a predetermined amount after the reading unit starts reading the document, the control unit determines whether the position of the document in the orthogonal width direction can be determined based on the reading result of the reading means, and if the position of the document can be determined, based on the position of the document, the document of the plurality of documents 2. The image reading apparatus according to claim 1, wherein it is determined whether or not to display information indicating the placement position on the tray. When the distance between the position of the document and the reference position in the width direction is greater than a predetermined value, the control means determines to display information indicating the placement positions of the plurality of documents on the document tray. 3. The image reading device according to claim 2. 4. The image reading apparatus according to claim 3, wherein the reference position is the center position of the document tray in the width direction, and the position of the document is the center position of the document in the width direction. . In the first mode, at least one of the plurality of documents placed on the document tray is free size, and a predetermined combination of standard sizes in which the plurality of documents placed on the document tray are different. 5. The image reading apparatus according to any one of claims 1 to 4, wherein said reading mode is used when a combination different from is included. The reading mode includes a second mode used when the plurality of documents placed on the document tray are the predetermined combination of different standard sizes,
When the second mode is set as the reading mode, the control means detects a jam of the document or a tilt of the document larger than a predetermined amount, but still places the plurality of documents on the document tray. 6. The image reading apparatus according to claim 5, wherein information indicating the position is not displayed. 7. The image reading apparatus according to claim 6, wherein said control means displays information indicating said predetermined combination when said reading mode is set. When the reading mode is set, the control means displays information indicating that the plurality of documents are placed on the document tray with one side parallel to the transport direction aligned in the second mode. 8. The image reading device according to claim 6, wherein: When setting the reading mode, in the first mode, the control means causes the center position of each of the plurality of documents in the width direction orthogonal to the transport direction to be the center region of the document tray in the width direction. 9. The image reading apparatus according to any one of claims 6 to 8, wherein information indicating that the plurality of documents are placed on the document tray is displayed. The information indicating the placement positions of the plurality of documents of different sizes on the document tray is such that the center position of each of the plurality of documents in the width direction orthogonal to the transport direction is the center region of the document tray in the width direction. 10. The image reading apparatus according to any one of claims 1 to 9, wherein the plurality of originals are placed on the original tray so as to be included in . When the jam of the document is detected, the control means displays the information indicating the occurrence of the jam, and when displaying the information indicating the placement position on the document tray, the document is displayed after the jam is displayed. 11. The image reading apparatus according to any one of claims 1 to 10, wherein information indicating the placement position on the tray is displayed.

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