Image reading device

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

Technical Field

[0001] The present invention relates to an image reading apparatus that sequentially reads a plurality of originals of different sizes.

Background Art

[0002] Conventionally, an image reading apparatus having an automatic document feeder (ADF) is known. Originals placed on a document tray are conveyed one by one by the ADF. A reading unit provided in the image reading apparatus reads an image of the conveyed original. In the document tray, two tray guides are provided at different positions in the width direction orthogonal to the document feeding direction (the document conveying direction). The two tray guides are configured to be movable in the width direction and regulate the position of the original in the width direction placed on the document tray. In such an image reading apparatus, an inclination may occur in the read image read by the reading unit due to skewing of the original, an assembly error of the reading unit, or the like.

[0003] For this reason, Patent Document 1 discloses a configuration that detects the inclination amount of the original in the read image based on the read image and corrects the inclination of the original in the read image by image processing. In Patent Document 1, an edge on the leading end side of the original in the conveying direction is detected from the read image, and the inclination amount of the original is detected based on the detected edge.

[0004] The sizes of originals include standard sizes such as A3 and A4 defined by ISO216, JIS P 0138, etc., and non-standard free sizes such as receipts and checks. Patent Document 2 discloses an image reading apparatus that determines the size of an original.

[0005] Multiple manuscripts of different sizes may be placed on the ADF document tray simultaneously. In the following description, the reading mode in which multiple manuscripts of different sizes are mixed on the ADF document tray and images of these multiple manuscripts are read is referred to as the "mixed loading mode". In contrast, the reading mode in which one or more manuscripts of the same size are placed on the ADF document tray and images of these manuscripts are read is referred to as the "normal mode". The mixed loading mode can be further classified into a "standard size mixed loading mode" and a "free size mixed loading mode". The "standard size mixed loading mode" is a reading mode used when each of the multiple manuscripts of different sizes to be read is a standard size that meets a predetermined condition. On the other hand, the "free size mixed loading mode" is a reading mode used when at least one free size manuscript is included in the multiple manuscripts of different sizes to be read, or when only standard sizes but do not meet the above-mentioned predetermined condition.

[0006] In the standard size mixed loading mode, the manuscript sizes that can be mixed are defined as the above-mentioned predetermined condition based on the manuscript width. The manuscript sizes that can be mixed are standard sizes where the difference in manuscript width is smaller than a predetermined value, for example, A3 and A4R, A4 and B5, etc. FIGS. 1(A) to 1(C) are views seen from a direction perpendicular to the plane including the conveyance direction and the width direction in the vicinity of the document tray. As shown in FIGS. 1(A) to 1(C), the feed rollers for feeding the manuscript to the conveyance path are provided in the central region in the width direction with respect to the tray guides #1 and #2. FIG. 1(A) shows a state in which two standard size manuscripts D#1 and D#2 that can be mixed are mixed on the document tray. Note that the manuscript width of manuscript D#1 is smaller than the manuscript width of manuscript D#2. In the case of the standard size mixed loading mode, as shown in FIG. 1(A), the user regulates the position in the width direction of manuscript D#2 by the tray guides #1 and #2, and then places the multiple manuscripts so that manuscript D#1 abuts against one of the tray guides. The above-mentioned predetermined condition is determined so that the feed roller can feed manuscript D#1 even when the manuscripts are placed on the document tray in this way.

Prior Art Documents

Patent Documents

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-92562 [Patent Document 2] Japanese Patent Application Laid-Open No. 2001-350225 [Summary of the Invention] [Problems to be Solved by the Invention]

[0008] On the other hand, in the case of the free-size mixed loading mode, the difference in the manuscript widths of the manuscripts to be mixed can be large. FIG. 1(B) shows a state in which a manuscript D#3 with a small manuscript width and a manuscript D#4 with a large manuscript width are mixed and loaded in the tray. Since the difference between the two manuscript widths is large, if the manuscript is placed on the manuscript tray in the same manner as in the fixed-size mixed loading mode, as shown in FIG. 1(B), the feeding roller cannot feed the manuscript D#3, and jamming may occur. Further, as shown in FIG. 1(C), when only one end portion in the width direction of the manuscript D#3 is in contact with the feeding roller, skewing of the manuscript D#3 may occur, and in some cases, the inclination of the read image of the manuscript D#3 may exceed a size that can be corrected. Thus, in the case of the free-size mixed loading mode, there is a possibility that the image of the manuscript cannot be properly read.

[0009] In view of the above problems, an object of the present invention is to suppress the improper reading of a plurality of manuscripts of different sizes. [Means for Solving the Problems]

[0010] According to one aspect of the present invention, an image reading apparatus includes a conveying unit that conveys a manuscript along a conveyance path, a feeding unit that sequentially feeds one or more manuscripts placed on a manuscript tray to the conveyance path, a reading unit that reads a manuscript conveyed in a conveyance direction along the conveyance path, and a control unit that, when a first mode of sequentially reading a plurality of manuscripts of different sizes placed on the manuscript tray is set as a reading mode, displays information indicating the placement positions of the plurality of manuscripts of different sizes on the manuscript tray when jamming of the manuscript or an inclination larger than a predetermined amount of the manuscript is detected. , the information indicating the placement positions of the plurality of original documents of different sizes on the original document tray indicates that the plurality of original documents are placed on the original document tray such that the central position of each of the plurality of original documents in the width direction orthogonal to the conveyance direction is included in the central region in the width direction of the original document tray. It is characterized by the above. [Effect of the Invention]

[0011] According to the present invention, it is possible to provide an image reading apparatus that suppresses inappropriate reading of a plurality of originals having different sizes. [Brief Description of the Drawings]

[0012]

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[0013] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the invention according to the claims. Although a plurality of features are described in the embodiments, not all of these plurality of features are essential for the invention, and the plurality of features may be arbitrarily combined. Further, in the accompanying drawings, the same or similar configurations are denoted by the same reference numerals, and redundant descriptions are omitted.

[0014] FIG. 2 is a configuration diagram of an image reading apparatus according to the present embodiment. The image reading apparatus includes a document reading apparatus 100 and an ADF 200. The ADF 200 is connected to the document reading apparatus 100 by an opening / closing hinge and is rotatable with respect to the document reading apparatus 100 about the opening / closing hinge as a rotation axis.

[0015] FIG. 3 is a cross-sectional view of the image reading apparatus. A document is placed on a document tray 201. When feeding the document, a feeding roller 205 is moved downward in the figure so as to contact the document on the document tray 201, and feeds the uppermost document among one or more documents placed on the document tray 201 to a conveyance path 210. A separation roller 206 is provided to prevent double feeding of the document. The document fed to the conveyance path 210 is conveyed to a position facing the glass 105 by rollers provided along the conveyance path. The front surface reading unit 103 includes a line sensor including a plurality of light receiving elements provided along a width direction orthogonal to the conveyance direction of the document. The front surface reading unit 103 irradiates light on the document through the glass 105 and receives the reflected light by the line sensor, thereby reading an image for one line in the width direction. The front surface reading unit 103 repeatedly reads an image for one line in the width direction of the document while the document is passing over the glass 105, thereby reading a front surface image including the entire document.

[0016] After reading the front surface image, the document passes through the glass 217 and is discharged to a discharge tray 220. When reading the back surface of the document as well, while the document is passing under the glass 217, the back surface reading unit 216 reads the back surface image.

[0017] On the original document tray 201, a tray guide plate 203 for restricting the position of the original document placed thereon in the width direction is provided. Two tray guide plates 203 are provided at different positions in the width direction and are configured to be movable in the width direction. Note that the two tray guide plates 203 are configured such that even if the distance in the width direction thereof is changed, the central position in the width direction between the two tray guide plates 203 does not change. The length detection sensor 202 detects whether the length of the original document placed on the original document tray 201 in the conveyance direction is equal to or greater than a predetermined value. The original document presence / absence detection sensor 204 detects whether an original document is placed on the original document tray 201. The skew detection sensor 208 detects the skew of the original document. The separation sensor 209 and the lead sensor 212 detect the leading edge and the trailing edge of the original document in the conveyance path 210. The timing when the lead sensor 212 detects the leading edge of the original document and the timing when the lead sensor 212 detects the trailing edge of the original document are used to determine the reading start timing and the reading end timing of the original document by the front surface reading unit 103 and the back surface reading unit 216.

[0018] Note that the front surface reading unit 103 is configured to be movable along the movement guide 102. For example, when reading an image of an original document placed on the document table glass 101 instead of an original document fed from the ADF 200, the front surface reading unit 103 reads the image of the original document placed on the document table glass 101 while moving along the movement guide 102.

[0019] Next, the control configuration of the image reading apparatus will be described with reference to FIG. 4. The image reading apparatus includes a reader controller 300 and a system controller 320. The CPU 301 of the reader controller 300 controls each component shown in FIG. 3 by executing a program stored in the ROM 302. At this time, the CPU 301 stores data used for control and temporary data in the RAM 303. In FIG. 4, the sensor 2000 is a general term for the length detection sensor 202, the document presence / absence detection sensor 204, the skew detection sensor 208, the separation sensor 209, and the read sensor 212 described in FIG. 3. The width detection unit 313 detects the length in the width direction of a document placed on the document tray 201 based on the positions of the two tray guide plates 203. The motor 2001 is a general term for one or more motors and is a drive source for driving each component shown in FIG. 3. The image processing unit 305 performs various correction processes including inclination correction on the image data of the front surface 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, and stores the corrected image data in the image memory 304. The CPU 301 transmits the image data stored in the image memory 304 to the system controller 320 via the communication line 328. Each functional block of the reader controller 300 can communicate with each other via a bus.

[0020] The CPU 321 of the system controller 320 executes the programs stored in the ROM 322 to control the reader controller 300, perform communication control with external devices, etc. At this time, the CPU 321 stores the data used for control and temporary data in the RAM 323. The image processing unit 324 performs electronic document processing such as image / file conversion and 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 can be further connected to the Internet. The 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 state of the image reading device to the user. Each functional block of the system controller 320 can communicate with each other via a bus.

[0021] Subsequently, the process of detecting and correcting the inclination of the document from the surface image read by the surface reading unit 103 will be described. FIG. 5(A) shows the document used for the description. The CPU 301 determines the reading start timing and the reading end timing so that the document is included in the surface image in consideration of the occurrence of skew of the document. FIG. 5(B) shows the surface image when the document shown in FIG. 5(A) is read. The image processing unit 305 detects the leading edge of the document from the surface image, and determines the angle θ (amount of inclination) between the detected leading edge and the width direction as shown in FIG. 5(C). Further, the image processing unit 305 determines the position of the document in the surface image at the reference position. In FIG. 5(C), taking the left end of the leading edge as the reference position, 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 conveyance direction are the x-axis direction and the y-axis direction respectively, and the upper left corner of the surface image is taken as the origin.

[0022] The image processing unit 305 rotates the surface image so that the leading edge of the document is parallel to the width direction around the reference position, and further performs correction processing on the surface image so that the reference position becomes the origin of the surface image. FIG. 6 shows the corrected surface image. The image processing unit 305 stores the corrected image data in the image memory 304.

[0023] Next, the processing executed by the CPU 301 when reading the document placed on the ADF 200 will be described with reference to FIG. 7. The reading of the document placed on the ADF 200 is started when the CPU 301 receives a reading instruction from the CPU 321. Note that FIG. 7 shows the reading process of a single document, and the CPU 301 repeats the process of FIG. 7 until the document placed on the ADF 200 runs out (until the document presence / absence detection sensor 204 no longer detects the document). 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 no longer detects the document), the CPU 301 notifies the CPU 321 of the completion of reading.

[0024] In the present embodiment, it is assumed that the user can set either the "standard size mixed loading mode" or the "free size mixed loading mode" as the reading mode when placing documents of different sizes on the ADF 200 via the operation unit 326. Both the "standard size mixed loading mode" and the "free size mixed loading mode" are reading modes used when placing a plurality of documents of different sizes on the document tray 201 and reading them in order. However, in the case of the "standard size mixed loading mode", each of the plurality of documents placed on the document tray 201 is of 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 at least one free size (non-standard size) document is included in the plurality of documents placed on the document tray 201. Further, the "free size mixed loading mode" is a reading mode used when each of the plurality of documents placed on the document tray 201 is of a standard size but includes a combination different from the above-mentioned predetermined combination. Note that the standard size is a standard dimension (standard size) defined by a standardization organization such as ISO, JIS, or ANSI.

[0025] FIG. 8 shows an example of a screen which is the information that the CPU 321 displays on the operation unit 326 to allow the user to select a reading mode. As shown in FIG. 8, regarding the "standard size mixed loading mode", information about the standard sizes that can be combined is notified to the user. Also, regarding the "standard size mixed loading mode", information indicating that the manuscripts should be placed on the manuscript tray 201 with one side parallel to the conveyance direction of each manuscript aligned is notified to the user. Note that regarding the said one side, information indicating that it should be placed on the manuscript tray 201 by butting against one side of the tray guide plate 203 is also notified to the user. On the other hand, as shown in FIG. 8, regarding the "free size mixed loading mode", in the width direction, the user is notified that each manuscript should be placed on the manuscript tray 201 such that the central position of each manuscript coincides with the central position of the two tray guide plates 203 or is located in the vicinity of the central position of the two tray guide plates 203. Specifically, reference numeral 50 in FIG. 8 is a mark indicating the region in the width direction where the feed roller 205 (see FIGS. 1 and 2) is provided, that is, the central region in the width direction of the manuscript tray 201. In the case of the "free size mixed loading mode", the user is notified that the manuscript should be placed such that the central position in the width direction of the manuscript is located within the width direction section of the mark 50. That is, the user is notified that the manuscript should be placed such that the central position in the width direction of the manuscript is located within the width direction section of the mark 50, that is, the region in the width direction where the feed roller 205 (see FIGS. 1 and 2) is provided. Note that in the present embodiment, the feed roller 205 is provided such that the center in the width direction of the feed roller 205 coincides with the centers of the two tray guide plates 203. The image reading apparatus is configured such 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.

[0026] Returning to FIG. 7, the CPU 301 starts conveying the topmost document on the document tray 201 at S10. At S11, the CPU 301 determines 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 at S15 whether a predetermined period has elapsed since the start of document conveyance. If the predetermined period has not elapsed since the start of document conveyance, the CPU 301 repeats the process from S11. On the other hand, if the predetermined period has elapsed since the start of document conveyance, the CPU 301 determines that a document jam has occurred and advances the process to S18.

[0027] When the read sensor 212 detects the leading edge of the document at S11, the CPU 301 determines the reading start timing of the surface reading unit 103 based on this detection timing, and causes the surface reading unit 103 to start reading the document at S12 when the determined reading start timing is reached. After that, the CPU 301 determines at S13 whether the read sensor 212 has detected the trailing edge of the document. If the read sensor 212 has not detected the trailing edge of the document, the CPU 301 determines at S16 whether a predetermined period has elapsed since the start of document reading. Note that the predetermined period in S16 and the predetermined period in S15 are set independently. If the predetermined period has not elapsed since the start of document reading, the CPU 301 repeats the process from S13. On the other hand, if the predetermined period has elapsed since the start of document reading, the CPU 301 determines that a document jam has occurred, causes the surface reading unit 103 to stop reading the document at S17, and then advances the process to S18.

[0028] When the read sensor 212 detects the trailing edge of the document at S13, the CPU 301 determines the reading end timing of the surface reading unit 103 based on this detection timing, and causes the surface reading unit 103 to finish reading the document at S14 when the determined reading end timing is reached. The image data of the surface image read by the surface reading unit 103 is output to the image processing unit 305, and skew correction and the like are performed.

[0029] On the other hand, when the CPU 301 determines that a paper jam has occurred in the document (when S15 or S16 is Yes), in S18, it notifies the CPU 321 of a reading failure. Subsequently, in S19, the CPU 301 determines whether the reading mode is the free-size mixed loading mode. If the reading mode is the free-size mixed loading mode, in S20, the CPU 301 notifies the CPU 321 to perform guidance display regarding the document placement method. Thereby, the CPU 321 displays guidance as shown in, for example, FIG. 9 on the operation unit 326. The screen shown in FIG. 9 indicates to the user the placement position of the document on the document tray in the case of the free-size mixed loading mode.

[0030] Note that, for example, when a reading failure occurs because the read sensor 212 does not turn off even after a predetermined period has elapsed since the start of document reading in S16, it is also possible to adopt a configuration in which it is determined whether the document placement position is appropriate based on the reading result of the surface image read so far. In this case, it is also possible to adopt a configuration in which the process of S20 is skipped if the document placement position is appropriate. FIG. 10 is an explanatory diagram of the process for determining whether the document placement position is appropriate, and shows a partial area on the leading edge side of the read surface image. xc in FIG. 10 is the central position in the width direction of the surface image and corresponds to the central position in the width direction between the document trays 201. x0 in FIG. 10 is the reference position in the width direction of the document, that is, in this example, the position of the left end of the leading edge of the document. The CPU 301 determines the width Wp and the position x0 of the document from the leading edge. Then, the CPU 301 obtains xp = x0 + Wp / 2 as the position xp in the surface image at the central position in the width direction of the document. The CPU 301 obtains the difference between xp and xc. If this difference is greater than a predetermined value, it is assumed that the document placement position is not appropriate. For example, the fact that this difference is greater than the predetermined value is assumed to mean that, similar to when the user is in the "regular-size mixed loading mode", all the documents are pushed against one side of the tray guide plate 203 and placed on the document tray 201. Therefore, when the difference is greater than the predetermined value, the correct placement method is displayed to the user in S20. On the other hand, when the difference is not greater than the predetermined value, it is determined that the user has placed the document appropriately, and in this case, the process of S20 is skipped to suppress unnecessary notifications.

[0031] Figure 11 shows the processing executed by the CPU 321 when reading the document placed on the ADF 200. At S30, the CPU 321 instructs the CPU 301 to read the document. At S31, it determines whether a read completion notification has been received from the CPU 301. When receiving a read completion notification from the CPU 301, the CPU 321 ends the processing of Figure 11. On the other hand, if no read completion notification has been received from the CPU 301, the CPU 321 determines at S32 whether a read failure notification has been received from the CPU 301. If no read failure notification has been received, the CPU 321 repeats the processing from S31. On the other hand, when a read failure notification is received from the CPU 301, the CPU 321 notifies the user at S33 that a jam has occurred, and displays on the operation unit 326 a screen prompting the user to remove the jammed document. Figure 12 shows an example of such a screen. Subsequently, the CPU 321 determines at S34 whether a guidance display notification has been received from the CPU 301. If no guidance display notification has been received, the CPU 321 ends the processing of Figure 11. On the other hand, if a guidance display notification has been received, the CPU 321 displays, for example, the screen of Figure 9 on the operation unit 326 to guide the user on the placement position of the document in the case of the free-size mixed loading mode.

[0032] As described above, in this embodiment, when the user selects any mixed loading mode, 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. 8. Also, for the regular size mixed loading mode, information indicating the combinations of regular sizes that can be loaded is also notified. Then, when the image reading apparatus fails to read an image in the free size mixed loading mode, it notifies the user of the placement position of the document on the document tray 201. With this configuration, it is possible to suppress operation errors by the user and suppress the occurrence of a reading failure again. That is, it is possible to provide an image reading apparatus that suppresses the improper reading of a plurality of documents of different sizes. Also, when a reading failure occurs after the start of reading by the surface reading unit 103, the image reading apparatus can determine whether the placement position of the document is appropriate based on the surface image that has already been read. Even when the image reading apparatus fails to read an image in the free size mixed loading mode, if it is determined that the placement position of the document is appropriate, it can skip displaying the placement position on the document tray 201 to the user. By not notifying the user of the placement position on the document tray 201 when it is determined that the placement position of the document is appropriate, it is possible to suppress performing unnecessary displays to the user.

[0033] In addition, in this embodiment, the reading modes of the image reading apparatus include a normal mode and a mixed loading mode, and the mixed loading mode further includes a fixed-size mixed loading mode and a free-size mixed loading mode. In the fixed-size mixed loading mode and the free-size mixed loading mode, the placement position and placement method of the document on the document tray 201 were different. However, the present invention is not limited to being applied to an image reading apparatus having such reading modes. For example, when reading documents of a plurality of different sizes without classifying them into the fixed-size mixed loading mode and the free-size mixed loading mode, the present invention can be applied to an image reading apparatus that uses only one mixed loading mode. The method of placing the document on the document tray 201 in this mixed loading mode is the same as that in the free-size mixed loading mode of this embodiment. In this case, the process of S19 in FIG. 7 becomes a process of determining whether it is the mixed loading mode or the normal mode. In the case of the mixed loading mode, the process proceeds to S20, and in the case of the normal mode, S20 is skipped.

[0034] In addition, in this embodiment, it was determined whether reading failed based on the detection result of the read sensor 212, but this is not the only case. For example, a configuration may be adopted in which it is determined that reading has failed when the inclination amount or skew amount of the document is larger than a predetermined amount. When the inclination amount of the document is larger than a predetermined amount, the conveyance of the document may be stopped, or it may be discharged outside the image reading apparatus as it is. When stopping the conveyance of the document, after notifying the user of the placement position on the document tray 201 after notifying the user to take out the document (FIG. 12). Note that the inclination amount of the document may be the detection result of the skew detection sensor 208, or may be the inclination amount θ used when the image of the document is rotationally corrected.

[0035] Also, in this embodiment, in any case of the standard size mixed loading mode and the free size mixed loading mode, when a reading fails, the placement position on the document tray 201 is notified to the user, but this is not the limit. For example, when a reading fails in the standard size mixed loading mode, the placement position on the document tray 201 may not be notified to the user, and when a reading fails in the free size mixed loading mode, the placement position on the document tray 201 may be notified to the user.

[0036] [Other Embodiments] The present invention can also be realized by supplying a program that realizes one or more functions of the above-described embodiment to a system or device via a network or a storage medium, and having one or more processors in a computer of the system or device read and execute the program. Further, it can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

[0037] The invention is not limited to the above-described embodiment, and various changes and modifications are possible without departing from the spirit and scope of the invention. Therefore, claims are attached to disclose the scope of the invention.

Explanation of Reference Numerals

[0038] 210: Conveyor path, 200: ADF, 103: Surface reading unit, 300: Reader controller, 320: System controller

Claims

1. Conveying means for conveying the document along the conveyance path, Feeding means for sequentially feeding one or more documents placed on the document tray to the conveyance path, Reading means for reading the document conveyed in the conveyance direction along the conveyance path, When a first mode in which a plurality of documents of different sizes placed on the document tray are sequentially read is set as the reading mode, control means for displaying information indicating the placement positions of the plurality of documents of different sizes on the document tray when a jam of the document or an inclination greater than a predetermined amount of the document is detected, Comprising, The information indicating the placement positions of the plurality of documents of different sizes on the document tray indicates that the plurality of documents are placed on the document tray such that the central positions of the plurality of documents in the width direction orthogonal to the conveyance direction are included in the central region of the document tray in the width direction. An image reading apparatus characterized by this.

2. When the first mode is set, the control means determines whether it is possible to determine the position of the document in the width direction based on the reading result of the reading means when a jam of the document or an inclination greater than a predetermined amount of the document is detected after the reading means starts reading the document. When it is possible to determine the position of the document, it is determined whether to display information indicating the placement positions of the plurality of documents on the document tray based on the position of the document. The image reading apparatus according to claim 1, characterized by this.

3. The control means determines that information indicating the placement positions of the plurality of documents on the document tray is to be displayed when the distance between the position of the document in the width direction and a reference position is greater than a predetermined value. The image reading apparatus according to claim 2, characterized by this.

4. The reference position is the central position of the document tray in the width direction, and the position of the document is the central position of the document in the width direction. The image reading apparatus according to claim 3, characterized by this.

5. The first mode is the reading mode used when at least one of the plurality of documents placed on the document tray is a free size and when the plurality of documents placed on the document tray include a combination different from a predetermined combination of different standard sizes. The image reading apparatus according to any one of claims 1 to 4, characterized by this.

6. The reading mode includes a second mode that is used when the plurality of originals placed on the original tray are in a predetermined combination of different standard sizes. When the second mode is set as the reading mode, the control means does not display information indicating the placement position of the plurality of originals in the original tray even if a jam of the original or an inclination greater than a predetermined amount of the original is detected. The image reading apparatus according to claim 5, characterized in that.

7. The control means displays information indicating the predetermined combination when setting the reading mode. The image reading apparatus according to claim 6, characterized in that.

8. When setting the reading mode, the control means displays information indicating that in the second mode, the plurality of originals are placed on the original tray with one side parallel to the conveyance direction aligned. The image reading apparatus according to claim 6 or 7, characterized in that.

9. When setting the reading mode, the control means displays information indicating that in the first mode, the plurality of originals are placed on the original tray such that the central position of each of the plurality of originals in the width direction orthogonal to the conveyance direction is included in the central region in the width direction of the original tray. The image reading apparatus according to any one of claims 6 to 8, characterized in that.

10. When the control means detects a jam of the original, it displays information indicating the occurrence of the jam, and when displaying information indicating the placement position on the original tray, it displays the information indicating the placement position on the original tray after displaying the jam. The image reading apparatus according to any one of claims 1 to 9, characterized in that.

Images