JP2018006929A - Image reading apparatus and image formation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform when a paper jam occurs during reading a manuscript image by an automatic feed and read mode, the reading of a residual manuscript correctly and promptly, including the manuscript which causes the paper jam.SOLUTION: On the occurrence of a paper jam inside an ADF 6 while an image reading unit 5 is reading the manuscript in an automatic feed and read mode, the ADF 6 suspends to feed the manuscript, and a paper jam page storage unit 312 stores a page number counted by a page number count 311. When the paper jam is removed, the image reading unit 5 reads the residual manuscript in a manuscript tray, by the automatic feed and read mode. Thereafter, the image reading unit 5 reads the manuscript causing the paper jam by a placed-document read mode. In an image storage unit 32, an image read by the placed-document read mode is stored in association with the page number stored in the paper jam page storage unit 312.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an image reading apparatus and an image forming apparatus having a function of conveying a document to an image reading position and reading the document.

  In an image forming apparatus such as a scanner, a copier, a printer, or a multifunction device having these functions, an automatic document feed that automatically conveys a document placed on a document tray to a document reading position as a document reading mode. Many devices include an apparatus (Auto Document Feeder, hereinafter referred to as “ADF”). An image forming apparatus provided with such an ADF has, as a document reading mode, an automatic feed reading mode using an ADF and a placement reading mode in which a user places a document on a contact glass and reads an image. Have.

  However, when an original is fed to the reading position using the ADF, a paper jam (jam) may occur in the transport path in the ADF. Patent Documents 1 to 4 describe a method of reading the remaining document when a paper jam occurs during reading of the document in the automatic feed reading mode.

JP 2001-136339 A Japanese Patent Laid-Open No. 06-205167 Japanese Patent Laid-Open No. 10-271287 JP 2000-089617 A

  However, in the case of the method disclosed in Patent Document 1, since there is no operation for re-reading an image of a document that has caused a paper jam, if the image of the document is not read correctly, a page defect occurs in the printed matter. . Patent Document 2 describes a method of reading a remaining document after a paper jam has occurred in the placement reading mode. However, when there are a large number of remaining documents, all of them are placed in the placement reading mode. Reading it takes a lot of time and effort.

  In the case of Patent Document 3 and Patent Document 4, reading of an image after a paper jam has occurred can be selected from the automatic feed reading mode or the placement reading mode. For this reason, if the automatic feed reading mode is selected, automatic reading can be resumed from a document in which a paper jam has occurred. However, since a document that has once jammed is often wrinkled, folded, or damaged, reading in the automatic feed reading mode may cause a jam again.

  The present invention has been made to solve the above-described problem. When a paper jam occurs during reading of a document image in the automatic feed reading mode, the document that causes the paper jam is removed. In addition, the object is to accurately and promptly read the remaining originals.

  The image reading apparatus according to the present invention sequentially conveys a document placed on a document tray to a predetermined reading position, and then discharges the document to a discharge tray at a position different from the reading position. A contact glass on which the original is placed, an original passing through the reading position, an image reading unit for reading an image of the original placed on the contact glass, and an image read by the image reading unit in order The image reading unit in any one of an image storage unit for storing and an automatic feed reading mode for reading an image of a document passing through the reading position, or a placement reading mode for reading a document placed on the contact glass A control unit that causes the document to be read, a jam detection unit that detects occurrence and release of a paper jam in the document transport unit, and each of the images read by the image reading unit A page number assigning unit for assigning a page number to the image of the manuscript, and the page number assigning unit for the image of the original read by the image reading unit when the jam detecting unit detects a paper jam. A paper jam page storage unit for storing page numbers, and the control unit detects a paper jam when the image reading unit reads an image in the automatic feed reading mode. The document transport unit stops transporting the document, and after the jam detection unit detects the release of the paper jam, the document transport unit resumes transport of the remaining documents on the document tray. A document read in the placement reading mode by causing the image reading unit to read an image of the document in the automatic feed reading mode and to cause the image reading unit to read an image of the document in the placement reading mode. The image, in association with the page number stored in the paper jam page storage section, is intended to be stored in the image storage unit.

  An image forming apparatus according to the present invention includes the image reading device and an image forming unit that forms an image read by the image reading device on a recording medium, and the control unit includes the image reading unit. When the jam detection unit detects a paper jam while the image forming unit sequentially forms an image on the recording medium by reading the image in the automatic feed reading mode and storing the image in the image storage unit. The image formation by the forming unit is interrupted, and then the image of the document remaining on the document tray by the image reading unit to be performed after the reading in the automatic feed reading mode and the reading in the above-described reading mode is completed. The image forming unit restarts image formation for the image obtained by the both readings and stored in the image storage unit.

  According to the present invention, when a paper jam occurs in the document conveying unit while reading an image in the automatic feed reading mode, the image reading unit automatically feeds the remaining document placed on the document tray. On the other hand, an image of a document that causes a paper jam is read in the placement reading mode. For this reason, if the original is wrinkled or folded or damaged due to a paper jam, the wrinkle or crease is extended, and if it is damaged, the original is newly printed with another printer. The original can be read. As a result, when a paper jam occurs during reading of the original image in the automatic feed reading mode, the remaining originals including the original that caused the paper jam are read accurately and promptly. be able to.

It is a front sectional view showing the structure of the image forming apparatus. 2 is a functional block diagram illustrating a main internal configuration of the image forming apparatus. FIG. 6 is a flowchart illustrating a flow of processing of image reading and image formation. 6 is a flowchart illustrating a flow of processing of image reading and image formation. It is an example of the screen which a display part displays. It is an example of the screen which a display part displays. It is an example of the screen which a display part displays. It is an example of the screen which a display part displays. It is an example of the screen which a display part displays.

  Hereinafter, an image reading apparatus and an image forming apparatus according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, the image forming apparatus 1 using the electrophotographic method will be described as an example. However, an image forming apparatus using another printing method such as an ink jet method may be used. FIG. 1 is a front sectional view showing a structure of an image forming apparatus 1 in the present embodiment.

  The image forming apparatus 1 may be, for example, a copier, a printer, a scanner, a facsimile, or the like, or may be a multifunction machine having these functions. The image forming apparatus 1 includes an apparatus main body 11 including an operation unit 47, an image forming unit 12, a fixing unit 13, a paper feeding unit 14, an automatic document feeder (ADF) 6, an image reading unit 5, and the like. .

  The image reading unit 5 includes a contact glass 161 for placing a document provided on the upper surface, a light source 26 for irradiating the document placed on the contact glass 161, and reflected light from the document to the second mirror 22. The first mirror 21 that reflects, the third mirror 23 that guides the reflected light to the image sensor 25 constituted by an image sensor such as a CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor), the lens system 24, and the document reading slit 53. (Reading position).

  The control unit 310 described later causes the image reading unit 5 to perform document reading in two modes, an automatic feed reading mode and a placement reading mode.

  In the automatic feed reading mode, under the control of the control unit 310, the ADF 6 feeds the document bundle S placed on the document tray 61 one by one by driving the paper feed roller 613 and the transport roller 615, and the document reading slit. The paper is transported to a position facing the paper 53 and can be read by the image reading unit 5 through the document reading slit 53, and then the discharge roller 618 is driven and discharged to the discharge tray 66. The ADF 6 is openable and closable with respect to the contact glass 161 on the upper surface of the image reading unit 5, and has a document pressing plate 162 on a surface facing the upper surface of the contact glass 161 when the ADF 6 is in a closed state.

  The jam detection sensors 631 and 632 are sensors that detect a paper jam in the document conveyance path in the ADF 6. For example, the sensor is an optical sensor that detects the presence or absence of a document on the conveyance path. The control unit 310 to be described later determines that a paper jam has occurred at the position where the jam detection sensor 631 or 632 is provided when a signal indicating the presence of an original from the jam detection sensor 631 or 632 continues for a certain period or longer. .

  The jam detection sensor 631 is disposed upstream of the document reading slit 53 in the document conveyance direction, and the jam detection sensor 632 is disposed downstream of the document reading slit 53 in the document conveyance direction. The jam detection sensor 631 can detect a paper jam upstream of the document reading slit 53 in the document conveyance direction, and the jam detection sensor 632 can detect a paper jam downstream of the document reading slit 53 in the document conveyance direction.

  In the placement reading mode, under the control of the control unit 310, when the user places an original on the contact glass 161, closes the ADF 6 and presses a start button (not shown), the control unit 31 (to be described later) The light source 26 emits light according to the control, and the light from the light source 26 passes through the contact glass 161 and is irradiated onto the document. As a result, the reflected light of the document enters the first mirror 21 through the contact glass 161. The incident light passes through the second mirror 22, the third mirror 23, and the lens system 24 and then enters the image sensor 25.

  The image sensor 25 operates according to the control of the control unit 31 and converts incident light into an electrical signal. The image sensors 25 are arranged in the main scanning direction and obtain an output value for one line in the main scanning direction.

  Further, the light source 26, the first mirror 21, the second mirror 22, and the third mirror 23 are moved at a constant speed in the sub-scanning direction orthogonal to the main scanning direction by a driving unit (not shown) such as a motor. In this way, the image reading unit 5 can continuously acquire an output value for one line in the main scanning direction of the document in the sub-scanning direction, and as a result, can read the image of the entire document.

  The operation unit 47 receives an instruction such as an image forming operation execution instruction or a document reading operation execution instruction from the user. The operation unit 47 includes a display unit 473 that displays operation guidance for the user.

  When the image forming apparatus 1 performs an image forming operation, the image forming unit 12 controls the sheet P fed from the sheet feeding unit 14 based on the image read by the image reading unit 5 under the control of the control unit 310. A toner image is formed on the surface. When performing color printing, the magenta image forming unit 12M, the cyan image forming unit 12C, the yellow image forming unit 12Y, and the black image forming unit 12Bk of the image forming unit 12 are charged, exposed, and developed. A toner image is formed on the photosensitive drum 121 by the process, and the toner image is transferred onto the intermediate transfer belt 125 by the primary transfer roller 126.

  The toner images of the respective colors transferred onto the intermediate transfer belt 125 are superimposed on the intermediate transfer belt 125 with the transfer timing adjusted to form a color toner image. The secondary transfer roller 210 conveys the color toner image formed on the surface of the intermediate transfer belt 125 from the sheet feeding unit 14 through the conveyance path 190 at the nip N between the intermediate transfer belt 125 and the driving roller 125a. It is transferred to the paper P that has been transferred. Thereafter, the fixing unit 13 fixes the toner image on the paper P to the paper P by thermocompression bonding. The sheet P on which the color image has been formed after the fixing process is completed is discharged to the discharge tray 151.

  The paper feed unit 14 includes a plurality of paper feed cassettes. Then, the control unit 31 to be described later drives the pickup roller 145 of the paper feed cassette containing the paper of the size designated by the user's instruction to rotate the paper P contained in each paper feed cassette to the nip portion N. Transport toward

  FIG. 2 is a functional block diagram showing the main internal configuration of the image reading apparatus 1. The image forming apparatus 1 includes a control unit 31, an operation unit 47, an ADF 6, an image storage unit 32, an image reading unit 5, and an image forming unit 12. The same components as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

  The image storage unit 32 temporarily stores data read by the image reading unit 5.

  The control unit 31 includes a processor, a RAM, a ROM, a dedicated hardware circuit, and the like. The processor is, for example, a CPU (Central Processing Unit), MPU, ASIC, or the like. The control unit 31 includes a control unit 310, a page number assigning unit 311, a paper jam page storage unit 312, and a reading determination unit 313.

  The control unit 310 governs overall operation control of the image forming apparatus 1. In particular, in the present embodiment, the control unit 310 performs control for causing the image reading unit 5 to perform document reading in two modes of an automatic feed reading mode and a placement reading mode.

  The page number assigning unit 311 counts the number of sheets placed by the ADF 6 toward the document reading slit 53 among the documents placed on the document tray 61. For example, each time a document detection sensor provided in the ADF 6 detects a document when the document is conveyed by the ADF 6, the page number adding unit 311 gives a continuous page number to each document and reads the image of each document read. Is stored in association with. In the case of duplex scanning, the page number assigning unit 311 assigns a page number to each side of one document. The page number assigning unit 311 may assign a page number to each document every time the jam detection sensor 631 detects passage of the document.

  The paper jam page storage unit 312 stores the page number assigned by the page number assigning unit 311 to the document to be read by the image reading unit 5 when a paper jam occurs.

  The reading determination unit 313 determines whether or not the image reading unit 5 has normally read the entire document that has passed through the document reading slit 53. As an example of a determination method by the reading determination unit 313, if the reading determination unit 313 acquires an image read by the image reading unit 5, and the size of the read image can correspond to one page, the image reading is correct. Judge that it was done.

  If a paper jam occurs in the ADF 6 during document reading in the automatic feed reading mode, the paper jam page storage unit 312 stores the number of pages at that time. After the transport of all the documents placed on the document tray 61 is completed, the control unit 310 causes the image reading unit 5 to store the document that causes the paper jam placed on the contact glass 161 by the user. Read in placement reading mode. Then, the control unit 310 associates the page number stored in the paper jam page storage unit 312 with the image of the document read in the placement reading mode, and stores it in the image storage unit 32. By doing so, it is possible to read and form an image in the correct page order with respect to the document in which the paper jam has occurred.

  In addition, when a jammed document is wrinkled, folded, or damaged, the document placed on the document tray is repaired (wrinkled) while it is being read in automatic reading mode. Or printing a new document with another printer).

  Further, when a paper jam occurs at a position close to the discharge tray 66 (near the discharge port) after the image reading by the image reading unit 5 is completed, the reading of the original has been completed, so that the placement reading mode is again performed. There is no need to read with.

  Accordingly, when a paper jam occurs downstream of the document reading slit 53 in the conveyance direction, and the reading determination unit 313 determines that the document has been read normally, the paper jam page storage unit 312 stores the page number giving unit at that time. The control unit 310 does not store the number of pages counted by 311 and does not allow the image reading unit 5 to read the document in the placement reading mode. Thereby, it is possible to prevent the original from being read unnecessarily in the placement reading mode.

  The flow of image reading and image forming processing in this embodiment will be described with reference to FIGS. 3 and 4 are flowcharts showing the flow of processing. 5 to 9 show examples of screens displayed by the display unit 473. Hereinafter, the case of single-sided document reading will be described.

  First, the page number assigning unit 311 substitutes 0 for a variable N stored in a memory built in the control unit 31, for example (step S11). The variable N is an integer greater than or equal to zero. Subsequently, the control unit 310 conveys one document on the document tray 61 of the ADF 6 toward the document reading slit 53. Each time the document is conveyed, the page number assigning unit 311 increments the variable N by 1, and the control unit 310 causes the image reading unit 5 to read the image of the document passing through the document reading slit 53 (step S12). The control unit 310 associates each of the above-mentioned variables counted by the page number assigning unit 311 at the time of reading with the page number as the page number for each read image of the document, and then converts the image of each document to the image storage unit 32. Remember me.

  When the control unit 310 determines that a paper jam has occurred in the ADF 6 based on the outputs from the jam detection sensors 631 and 632 (step S13; YES), the control unit 310 has a paper jam in the display unit 473. The screen (FIG. 5) which notifies that is displayed (step S14). Based on the outputs from the jam detection sensors 631 and 632, the control unit 310 determines whether the paper jam occurrence position is upstream or downstream in the transport direction from the document reading slit 53 (step S15). . For example, when the jam detection sensor 631 detects a paper jam, the control unit 310 determines that the paper is upstream, and when the jam detection sensor 632 detects a paper jam, the control unit 310 determines that the paper is downstream.

  When the control unit 310 determines that a paper jam has occurred downstream from the document reading slit 53 (step S15; YES), the reading determination unit 313 determines whether the entire document has been read correctly (step S16). . If the reading determination unit 313 determines that the entire document has been read correctly (step S16; YES), the process proceeds to step S18.

  For example, when a paper jam occurs when the downstream end in the conveyance direction of the document to be read in the document conveyance path of the ADF 6 has already passed the reading position in the automatic feed reading mode, or the document reading slit 53 If a paper jam occurs at a position (for example, a discharge port) closer to the discharge tray 66 on the downstream side, there is a possibility that the image reading unit 5 has already correctly read the image of the document that caused the paper jam. . In this case, after the reading of the document placed on the document tray 61 is finished, it is not necessary for the image reading unit 5 to read again in the placement reading mode as a document having a paper jam.

  Therefore, as shown in step S15 and step S16, the control unit 310 determines that a paper jam has occurred downstream from the document reading slit 53, and the reading determination unit 313 determines that the image of the document has been read correctly. In this case, the paper jam page storage unit 312 does not store the count number (variable N) of the page number assigning unit 311.

  When the control unit 310 determines that the paper jam occurrence position is on the upstream side in the conveyance direction from the document reading slit 53 (step S15; NO), or the paper jam occurrence position is on the downstream side in the conveyance direction. If the unit 313 determines that the entire original has not been read correctly (step S16; NO), the paper jam page storage unit 312 stores the count number (variable N) of the page number assigning unit as a paper jam page. (Step S17).

  If YES in step S16, or after step S17, control unit 310 determines that the paper jam in ADF 6 detected in step S13 has been cleared based on the output from jam detection sensors 631 and 632 (step S18; YES), the process returns to step S12.

  Then, the control unit 310 repeats the processing from step S12 to step S19 until it determines that all the documents on the document tray 61 have been conveyed (step S19; NO). The paper jam page storage unit 312, when a paper jam occurs for a plurality of documents, records the count number (variable N) counted by the page number assigning unit 311 for each document in which a paper jam has occurred. Remember it as a page.

  When the controller 310 determines that all the documents on the document tray 61 have been conveyed (step S19; YES), the controller 310 determines whether the jammed page storage unit 312 stores a jammed page (step S19). S20).

  Here, when the control unit 310 determines that the paper jam page storage unit 312 does not store the paper jam page (step S20; NO), that is, when no paper jam occurs during the document conveyance by the ADF 6, the control is performed. The unit 310 causes the image forming unit 12 to form an image of the page of each document stored in the image storage unit 32 on a sheet (step S24), and ends the process.

  On the other hand, when the control unit 310 determines that the paper jam page storage unit 312 stores the paper jam page (step S20; YES), the control unit 310 displays a document with the paper jam on the display unit 473. A screen (FIG. 6) for notifying that it is placed on the contact glass 161 is displayed (step S21). Further, as shown in FIG. 6, the control unit 310 causes the display unit 473 to display the paper jam page stored in the paper jam page storage unit 312 as a “read error page” as shown in the message 81. In the present embodiment, it is assumed that a paper jam has occurred when the third and tenth pages of the document are read.

  The user presses the OK button 91 when reading the original having the paper jam again, and presses the cancel button 92 when reading is not performed. An instruction to display the next guidance is input to the control unit 310 when the OK button 91 is pressed, and an instruction to cancel document reading is input to the control unit 310 when the cancel button 92 is pressed.

  When the OK button 91 is pressed, the control unit 310 causes the display unit 473 to display a screen (FIG. 7) for notifying that the third-page document with paper jam is placed on the contact glass 161. When the user places a document on the contact glass 161 and presses the OK button 93 or the start button on the operation unit 47, a document reading start instruction is input to the control unit 310, and the control unit 310 displays the image reading unit 5. Then, the original image is read in the placement reading mode (step S22). The control unit 310 associates the page number stored in the paper jam page storage unit 312 with the image of the document read in the placement reading mode, and stores it in the image storage unit 32 (step S23).

  For example, when there are two documents (in this case, the third page and the tenth page) in which a paper jam has occurred, the image reading unit 5 first performs one document (here, the third page) as described above. When the reading is finished, the control unit 310 associates the page number (third page) stored in the paper jam page storage unit 312 with the read document image and stores it in the image storage unit 32. . The control unit 310 deletes “3” indicating the third page stored in the paper jam page storage unit 312. Thereafter, the process returns to S20.

  The control unit 310 determines whether or not a further page number is stored in the paper jam page storage unit 312 (step S20), and the further page number (10th page) is stored in the paper jam page storage unit 312. If it is determined that there is another document to be read (YES in step S20), the process proceeds to S21.

  Then, the control unit 310 causes the display unit 473 to display a screen (FIG. 8) for notifying that the tenth page document, which is the second document in which the paper jam has occurred, is placed on the contact glass 161 ( Step S21). When the user places the document on the contact glass 161 and presses the OK button 93 shown in FIG. 8 or the start button on the operation unit 47, a document reading start instruction is input to the control unit 310, and the control unit 310 Then, the image reading unit 5 is caused to read a document image in the placement reading mode (step S22). The control unit 310 associates the page number (tenth page) stored in the paper jam page storage unit 312 with the image of the document read in the placement reading mode, and stores it in the image storage unit 32. (Step S23). The control unit 310 deletes “10” indicating the tenth page stored in the paper jam page storage unit 312. Thereafter, the process returns to S20.

  If the control unit 310 determines that no further page number is stored in the paper jam page storage unit 312 (NO in step S20), it is determined that there is no further document to be read (NO in step S20). That is, all the reading of the document in which the paper jam has occurred is completed), and the process proceeds to S24.

  Thereafter, the control unit 310 causes the image forming unit 12 to form an image stored in the image storage unit 32 on a sheet (step S24). After this image formation, the process ends. The control unit 310 causes the display unit 473 to display a display screen indicating that an image is being formed (printing) as illustrated in FIG.

  As described above, in this embodiment, when a paper jam occurs during the automatic feed reading mode, after the document causing the paper jam is taken out from the ADF 6, the document is continuously placed on the document tray 61 in the automatic feed reading mode. The other placed original is read, and then the original image causing the paper jam is read in the placement reading mode. As a result, when a document with a paper jam is creased or folded during reading in the automatic feed scanning mode, the wrinkle is stretched, or when it is damaged, the document is renewed with another printer. Thus, it is possible to carry out document restoration work such as printing on the paper or removing the staple when it is fastened with staples, and the interruption time of the original reading can be eliminated as much as possible.

  Further, although a paper jam has occurred in the document transport path of the ADF 6 at a position near the discharge tray 66 on the downstream side of the document reading slit 53, the image of the document causing the paper jam is correctly read by the reading determination unit 313. In the case where the document is read, the document reading causing the paper jam by the image reading unit 5 is not performed in the above-described reading mode. As a result, it is possible to eliminate wasteful time for reading a document.

  In the present embodiment, it has been described that the image forming unit 12 forms an image on the sheet of the image stored in the image storage unit 32 after all the originals have been read. However, when the image reading unit 5 finishes reading one original, the image read by the image forming unit 12 may be immediately formed on a sheet.

  In this case, under the control of the control unit 310, when the image reading unit 5 reads one original until the paper jam occurs during reading in the automatic feed reading mode, the image forming unit 12 immediately An image is formed using the image of the document stored in the image storage unit 32. When a paper jam occurs, the image forming unit 12 interrupts image formation, and after the image reading unit 5 reads the remaining document in the automatic feed reading mode, the document that causes the paper jam is placed after this. Read in position reading mode. Thereafter, the image forming unit 12 executes image formation of each document read after the interruption stored in the image storage unit 32.

  That is, the control unit 310 detects a paper jam while the image reading unit 5 reads images in the automatic feed reading mode and images stored in the image storage unit 32 are sequentially formed on the paper by the image forming unit 12. Then, the image formation by the image forming unit 12 is interrupted, and the image of the document remaining on the document tray 61 by the image reading unit 5 to be performed thereafter is read in the automatic feed reading mode and the reading in the placement reading mode. After the image forming unit 12 completes the image forming unit 12, the image forming unit 12 resumes image formation for the image obtained by the both readings and stored in the image storage unit 32.

  As a result, when a paper jam occurs and the original with the paper jam is read again as described above, the time required for image formation for all the read images can be shortened.

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 12 Image forming part 161 Contact glass 31 Control unit 310 Control part 311 Page number giving part 312 Paper jam page storage part 313 Reading judgment part 32 Image storage part 47 Operation part 473 Display part 5 Image reading part 53 Original reading slit 6 ADF
61 Document tray 631, 632 Jam detection sensor

Claims (4)

A document transport unit that sequentially transports the document placed on the document tray to a predetermined reading position, and then discharges the document to the discharge tray;
A contact glass disposed at a position different from the reading position and on which a document is placed;
An image reading unit that reads an image of a document passing through the reading position and a document placed on the contact glass;
An image storage unit for sequentially storing images read by the image reading unit;
A control unit that causes the image reading unit to read an original in either an automatic feed reading mode for reading an image of the original passing through the reading position or a placement reading mode for reading an original placed on the contact glass. When,
A jam detecting unit for detecting occurrence and release of a paper jam in the document conveying unit;
A page number giving unit for assigning page numbers to the images of the respective originals read by the image reading unit;
A paper jam page storage unit that stores the page number assigned by the page number assigning unit to the image of the document read by the image reading unit when the jam detection unit detects a paper jam,
The control unit causes the document conveyance unit to stop conveying the document when the jam detection unit detects a paper jam while the image reading unit is reading an image in the automatic feed reading mode. After the jam detection unit detects the release of the paper jam, the document conveyance unit resumes conveyance of the remaining document on the document tray, and the image reading unit reads the image of the document in the automatic feed reading mode. The image reading unit reads the image of the document in the above-described reading mode, and the image of the document read in the placement reading mode is stored in the paper jam page storage unit. An image reading apparatus that associates page numbers and stores them in the image storage unit.   When the jam detecting unit detects the release of the paper jam, the control unit detects the remaining image on the original tray by the original conveying unit rather than reading the original image in the placement reading mode by the image reading unit. The image reading apparatus according to claim 1, wherein an image of a document is read first and an image of the document is read in the automatic feed reading mode by the image reading unit. A reading determination unit that determines whether the image reading unit has read the image of the document normally;
When the jam detection unit detects a paper jam downstream of the reading position in the document conveyance direction, and the reading determination unit determines that the image of the document causing the paper jam has been read normally, 3. The image reading apparatus according to claim 1, wherein the control unit does not read the image of the document that causes the paper jam by the image reading unit in the above-described reading mode. 4. An image reading apparatus according to any one of claims 1 to 3,
An image forming unit for forming an image read by the image reading device on a recording medium,
The control unit is configured to detect the jam while the image reading unit reads images in the automatic feed reading mode and stores the images stored in the image storage unit on the recording medium sequentially by the image forming unit. Detects a paper jam, interrupts the image formation by the image forming unit, and then reads the image of the document remaining on the document tray by the image reading unit to be performed in the automatic feed reading mode and before An image forming apparatus for causing the image forming unit to restart image formation for an image obtained in both reading modes and stored in the image storage unit after completion of reading in the description reading mode.