JP6693464B2 - Image reader - Google Patents

Description

  The present invention relates to an image reading device that reads a document and generates image data.

  The image reading device reads the set original document and generates image data. Then, an automatic document feeder (ADF) may be provided in the image reading device. The automatic document feeder automatically feeds the continuously set documents one by one. The image reading device reads the conveyed document. As a result, the user does not have to set the originals one by one on the original table. An example of a technique relating to such an automatic document feeder is described in Patent Document 1.

  Specifically, in Patent Document 1, a document is read, image information of at least the first document is stored, and the stored image information is image-formed on a sheet and output, and a jam occurs during image formation. When the original is read again, the stored image information of the original before the jam is compared with the image information of the original read again after the jam, and the compared image information is not the same. An image processing device that issues a warning in some cases is described. With this configuration, mistakes in resetting by the operator are reduced and unnecessary copying is attempted (see Patent Document 1: Claim 1, paragraph [0009]).

JP 2005-341357 A

  Some image reading apparatuses (scanners) include an automatic document feeder. Then, in the automatic document feeder, document jamming (clogging) may occur. When a document is jammed, the user performs a jam process. During the jam processing, the user removes the document jammed in the conveyance path. After the original is removed, the reading of the original is resumed.

  There is an automatic document feeder that requests resetting of all originals when reading is restarted after a jam occurs. The re-set original includes the read original. The read document is a document that has been read before the occurrence of a jam and has already generated image data. In the automatic document feeder that requires the resetting of all documents, the read documents are fed in the air. The blank feed is the conveyance of a document that is not read.

  When reloading all originals, the user may reverse the orientation of the originals. In other words, the original may be set again so that it is different from the orientation of the original before the jam occurred. If the reading is restarted while the orientation of the original is different, the result may be contrary to the intention of the user. Specifically, the image data obtained by the reading after the restart may be in the opposite direction to the intended direction. As described above, there is a problem that the orientation of the image data of the document may be different when the jam occurs.

  In the image processing apparatus described in Patent Document 1, a warning is issued when a document different from the document set before the jam occurs is set. However, the orientation of the set document is not considered. That is, it is not possible to warn that the orientation of the document is different before and after the jam occurs. I cannot give you accurate information about the reset document. In the technique described in Patent Document 1, a warning may be issued when the orientation of the document is different before and after the jam occurs. However, the set document itself does not change before and after the jam occurs. The technique described in Patent Document 1 may confuse the user due to the warning.

  In view of the above-mentioned problems of the prior art, the present invention enables a user to be warned that the orientation of a set original before jamming is different from the orientation of a reset original after jamming.

In order to achieve the above object, an image reading device according to a first aspect of the present invention includes a document feeding unit, an image reading unit, a storage unit, a display unit, an operation unit, and a control unit. The document transport unit transports the documents set on the document tray one by one. The image reading unit reads the document conveyed by the document conveying unit and generates read image data. The storage unit stores the read image data. The display unit displays. The operation unit receives a user operation. The control unit recognizes the number of read sheets, which is the number of originals for which the entire page can be read by the reading before the occurrence of the jam. After the occurrence of a jam, when restarting the reading in a state where all the originals are reset in the original conveying section, the control section determines which one of the read originals from the first sheet of the reset originals. Set one original as the original to be checked. The control unit conveys the read number of originals to the original conveyance unit. The control unit does not allow the image reading unit to read documents other than the confirmation target document among the read number of documents. The control unit causes the image reading unit to read only the confirmation target document. After the conveyance of the read number of originals, the control unit causes the original conveyance unit to temporarily stop the conveyance of the remaining originals which are the originals left on the original tray. The control unit includes first image data, which is the read image data corresponding to the confirmation target document obtained by the scanning before the occurrence of the jam, and second image data obtained by scanning the confirmation target document after the reading is restarted. Compare image data. The control unit determines whether or not the orientation of the document is different based on the comparison between the first image data and the second image data. When it is determined that the orientations of the originals are different, the control unit causes the display unit to display a warning. After the warning is displayed, when the operation unit receives a sequential confirmation instruction, the control unit receives one sheet of the remaining original document every time the sequential confirmation instruction, the rotation instruction, or the non-rotation instruction is received. Only the document is transported to the document transport section. The control unit causes the image reading unit to read the one remaining original document being conveyed. Each time the remaining document is read, the control unit causes the display unit to display a first reduced image obtained by reducing the read image data obtained by reading the remaining document. After the display of the first reduced image, when the operation unit receives the rotation instruction, the control unit rotates the read image data corresponding to the first reduced image. After the display of the first reduced image, when the operation unit receives the instruction of no rotation, the control unit does not rotate the read image data corresponding to the first reduced image.

  According to the present invention, it is possible to determine whether or not the orientation of the set original before the occurrence of the jam and the orientation of the reset original (the original reset after the occurrence of the jam) match. The user can be warned when the orientation of the original is different.

FIG. 1 is a diagram showing an example of a multifunction peripheral according to an embodiment. FIG. 6 is a diagram showing an example of a portion related to document reading in the multifunction machine according to the embodiment. FIG. 6 is a diagram showing an example of a portion related to document reading in the multifunction machine according to the embodiment. 7 is a flowchart illustrating an example of a basic processing flow when feeding and reading in the multi-function peripheral according to the embodiment. 6 is a flowchart illustrating an example of a flow of jam occurrence detection in the multifunction peripheral according to the embodiment. 6 is a flowchart illustrating an example of a processing flow when a jam occurs in the multi function peripheral according to the embodiment. It is a figure which shows an example of the reset request screen which concerns on embodiment. 6 is a flowchart showing an example of the flow of a reset document orientation confirmation process in the multifunction peripheral according to the embodiment. 6 is a flowchart illustrating an example of a remaining document reading setting process according to the embodiment. It is a figure which shows an example of the warning screen which concerns on embodiment. It is a figure which shows an example of the rotation confirmation screen which concerns on embodiment.

  The image reading apparatus according to the embodiment will be described below with reference to FIGS. 1 to 11. As the image reading apparatus, the multifunction peripheral 100 will be described as an example. Each element such as the configuration and arrangement described in the description of the present embodiment does not limit the scope of the invention and is merely an example of description.

(Complex machine 100)
A multifunction machine 100 according to the embodiment will be described with reference to FIG. FIG. 1 is a diagram illustrating an example of the multifunction peripheral 100 according to the embodiment. As shown in FIG. 1, the multi-function peripheral 100 includes a control unit 1, a storage unit 2, a printing unit 3, a document conveyance unit 4, an image reading unit 5, an operation panel 6, and a communication unit 7.

  The control unit 1 controls the overall control of the multifunction peripheral 100. The control unit 1 includes a CPU 11 and an image processing unit 12. The storage unit 2 includes a non-volatile storage device such as a ROM, a flash ROM, and a storage (HDD). The storage unit 2 includes a volatile storage device such as a RAM. The control unit 1 controls each unit by using the programs and data stored in the storage unit 2. The control unit 1 controls scanning in a job such as copying or transmission. The control unit 1 also controls printing, transmission, and storage of image data. The image processing unit 12 performs image processing on the image data generated by the image reading unit 5. For example, the image processing unit 12 performs rotation processing of image data.

  The printing unit 3 includes a paper feeding unit 3a, a paper transporting unit 3b, an image forming unit 3c, and a fixing unit 3d. In the case of a print job, the control unit 1 supplies the paper to the paper feeding unit 3a. The control unit 1 causes the sheet to be conveyed to the sheet conveying unit 3b. The paper transport unit 3b discharges the printed paper to the outside of the machine. The control unit 1 causes the image forming unit 3c to form a toner image based on the image data. The control unit 1 causes the image forming unit 3c to transfer the toner image onto the conveyed paper. The control unit 1 causes the fixing unit 3d to fix the transferred toner image on the sheet. In this way, the control unit 1 controls the operation of the printing unit 3.

  The operation panel 6 includes a display panel 61 (corresponding to a display unit), a touch panel 62 (corresponding to an operation unit), and a hard key 63 (corresponding to an operation unit). The control unit 1 causes the display panel 61 to display a message and a setting screen. Further, the control unit 1 causes the display panel 61 to display the operation image. For example, the operation image is a button, a key, or a tab. Based on the output of the touch panel 62, the control unit 1 recognizes the operated one of the displayed operation images. The hard keys 63 include a start key and a numeric keypad. The touch panel 62 and the hard keys 63 receive user setting operations (operations related to jobs). The control unit 1 communicates with the operation panel 6. The control unit 1 recognizes the setting content.

  The communication unit 7 is communicatively connected to the computer 200 and the FAX machine 300. The computer 200 is, for example, a PC or a server. The computer 200 and the FAX machine 300 are set as destinations on the operation panel 6. The control unit 1 causes the communication unit 7 to transmit the image data based on the reading of the document toward the set destination (scan transmission, FAX transmission). The communication unit 7 also receives print data from the computer 200 and the FAX machine 300. The control unit 1 causes the printing unit 3 to print based on the received print data (print job, FAX reception printing).

(Document transport section 4 and image reading section 5)
Next, a portion related to document reading by the multifunction peripheral 100 according to the embodiment will be described with reference to FIGS. 2 and 3 are diagrams illustrating an example of a portion related to document reading in the multifunction peripheral 100 according to the embodiment.

  As shown in FIG. 2, the document conveying section 4 is provided above the image reading section 5. The document transport unit 4 opens and closes in the vertical direction with respect to the image reading unit 5. The document feeder 4 functions as a cover that holds the document from above. The document feeder 4 feeds the set documents one by one and conveys them to the reading contact glass 51 (reading position). The image reading unit 5 reads the document conveyed by the document conveying unit 4. Then, the image reading unit 5 generates read image data D1. The storage unit 2 stores the read image data D1. For example, the read image data D1 is stored in the storage of the storage unit 2.

  The document transport unit 4 includes a document tray 41, a supply roller 42, a document transport path 43, a plurality of transport roller pairs 44, a discharge roller pair 45, and a discharge tray 46 in order from the upstream side in the document transport direction. A document set sensor 81 is provided on the document tray 41. A document discharge sensor 82 and a document detection sensor 83 are provided in the document transport path 43.

  As shown in FIG. 3, a document feeding control unit 40 is provided in the document feeding unit 4. The document conveyance control unit 40 is a substrate including a CPU and a memory. The output of the document set sensor 81 is input to the document conveyance control unit 40. The document conveyance control unit 40 recognizes (detects) the presence or absence of the sheet on the document tray 41 based on the output of the document set sensor 81. The document conveyance control unit 40 may notify the control unit 1 of the presence / absence of paper on the document tray 41. The control unit 1 can recognize the presence / absence of paper on the document tray 41.

  The document discharge sensor 82 is a sensor for detecting completion of document discharge to the discharge tray 46. The document discharge sensor 82 is provided near the discharge roller pair 45. The document discharge sensor 82 is provided upstream of the pair of discharge rollers 45 in the transport direction. The output of the document discharge sensor 82 is input to the document conveyance control unit 40. The document detection sensor 83 is a sensor for detecting arrival and passage of a document at the sensor installation position. The document detection sensor 83 is provided on the conveyance path between the paper feed roller and the feed reading contact glass 51. The document detection sensor 83 is provided near the feed / read contact glass 51. The output of the document detection sensor 83 is also input to the document conveyance control unit 40.

  When an instruction to execute a document reading job is given to the operation panel 6 (when the start key is operated), the control unit 1 communicates with the document conveyance control unit 40. The document reading job includes, for example, a copy job, a scan transmission job, and a scan storage job. Copying is a job that causes the printing unit 3 to print based on the image data obtained by reading. The scan save job is a job for storing the image data obtained by reading in the storage unit 2 (storage) in a non-volatile manner.

  When starting a document reading job, the control unit 1 confirms whether or not there is a document set on the document tray 41. When there is a document on the document tray 41, the control unit 1 issues a document conveyance instruction. In response to this instruction, the document conveyance control unit 40 drives the document conveyance motor 47. The document feed motor 47 rotates the supply roller 42 and the feed roller pair 44. Then, the document is conveyed toward the reading position. The document passes above the feed reading contact glass 51 (one side). The feed reading contact glass 51 is provided on the upper surface of the image reading unit 5. At the time of passage, the image reading unit 5 (reading unit 53) reads the document (feed reading).

  On the right side of the upper surface of the image reading unit 5, a placement reading contact glass 52 is arranged. A document such as a book is set on the platen reading contact glass 52. When the document is not set on the document feeding unit 4, the image reading unit 5 irradiates the document set on the platen reading contact glass 52 with light. The image processing unit 12 reads the front surface of the document to generate image data (table reading).

  As shown in FIG. 3, the image reading unit 5 is provided with a reading control unit 50. The reading control unit 50 controls the operation of the image reading unit 5. The read control unit 50 is a substrate including a CPU, a memory, and other circuits. The reading control unit 50 receives an instruction and a signal from the control unit 1 and reads a document.

  As shown in FIG. 2, the image reading unit 5 includes a reading unit 53, a wire 54, and a winding drum 55. The reading unit 53 is a CIS type scan unit. The wire 54 is connected to the reading unit 53 and the winding drum 55. The winding drum 55 is rotated by a winding motor 56 (see FIG. 3) that rotates in the forward and reverse directions. When the table is read, the reading control unit 50 rotates the winding drum 55. As a result, the reading unit 53 moves in the horizontal direction (sub-scanning direction, left-right direction in FIG. 2). At the time of feeding and reading, the reading control unit 50 arranges the reading unit 53 below the feeding and reading contact glass 51.

  As shown in FIG. 3, the reading unit 53 includes a lamp 53a and an image sensor 53b. The lamp 53a irradiates the document with light. The image sensor 53b includes a plurality of light receiving elements (pixels) arranged in the main scanning direction. Each light receiving element outputs an analog electric signal according to the amount of reflected light. The image reading unit 5 includes an image data generation unit 57. The image data generation unit 57 includes an A / D conversion unit 57a, a correction unit 57b, and an image memory 57c. The A / D converter 57a corrects the analog signal of each light receiving element of the image sensor 53b. Further, the A / D converter 57a converts the corrected analog signal of each light receiving element into a digital value (for example, 8 bits or 10 bits). The correction unit 57b performs a process of correcting the distortion of the image density due to the reading. For example, the correction unit 57b performs shading correction. The image data of each line generated by the image data generation unit 57 is stored in the image memory 57c.

  In this way, the image reading unit 5 generates the read image data D1 based on the reading of the document. The image data stored in the image memory 57c is transmitted to the storage unit 2. That is, the read image data D1 of each document is transmitted to the storage unit 2.

(Basic processing flow during feed reading)
Next, with reference to FIG. 4, an example of a basic processing flow at the time of feeding and reading will be described. FIG. 4 is a flowchart showing an example of a basic processing flow at the time of feeding and reading in the multi-function peripheral 100 according to the embodiment.

  The start in FIG. 4 is the time when the document reading job is started. For example, it is the time when the start key (hard key 63) of the operation panel 6 is operated. Settings related to the document reading job have already been made. Further, since the document is fed and read, the document is set on the document tray 41. Based on the output of the document set sensor 81, the control unit 1 recognizes the document set on the document tray 41.

  The reading control unit 50 starts counting the number of originals that have been (or could have been) read over the entire page from the start of the job (step # 11). The count value is 0 at the start of the job. After that, the read control unit 50 updates the count value every time the entire page of the document is read. Specifically, the reading control unit 50 adds 1 to the count value every time the entire page of the document is read.

  The control unit 1 causes the document feeding unit 4 to start feeding the document set on the document tray 41 (set document) (step # 12). The control unit 1 issues a conveyance start instruction to the document conveyance control unit 40. Based on this instruction, the document conveyance control unit 40 rotates the conveyance rotator. The originals are conveyed one by one toward the feed / read contact glass 51. After that, the document conveyance control unit 40 automatically and continuously conveys the set document one by one while providing a certain sheet interval.

  After the start of feeding the original, the control unit 1 causes the image reading unit 5 (reading unit 53) to start reading the original (step # 13). The control unit 1 issues a reading start instruction to the reading control unit 50. Based on this instruction, the reading control unit 50 causes the reading unit 53 to read the conveyed originals one by one. As a result, the read image data D1 of each page of the document is stored in the storage unit 2.

  Here, the document detection sensor 83 is provided in the document transport path 43 (see FIG. 2). The document detection sensor 83 is, for example, an optical sensor. The document detection sensor 83 outputs the first level when detecting the presence of a document. The document detection sensor 83 outputs the second level when the presence of the document is not detected. Based on the output of the document detection sensor 83, it is possible to detect the arrival and passage of the document at the installation position of the document detection sensor 83.

  The output of the document detection sensor 83 is input to the document conveyance control unit 40 and the reading control unit 50. When the output changes from the second level to the first level, the document feeding control unit 40 and the reading control unit 50 recognize that the leading edge of the document has reached the installation position of the document detection sensor 83. When the output changes from the first level to the second level, the document conveyance control unit 40 and the reading control unit 50 recognize that the trailing edge of the document has passed the installation position of the document detection sensor 83.

  When a predetermined waiting time elapses after the arrival of the leading edge of the document is recognized, the reading control unit 50 causes the reading unit 53 to start reading one page. The waiting time can be a time obtained by dividing the distance from the installation position of the document detection sensor 83 to the reading line of the reading unit 53 by the document transportation speed according to the specifications. Further, when the waiting time elapses after recognizing the passage of the trailing edge of the document, the reading control unit 50 causes the reading unit 53 to finish reading one page.

  The document conveyance control unit 40 continues to check whether the conveyance of all set documents has been completed (No in step # 14). For example, the document conveyance control unit 40 determines that the conveyance of all set documents is completed when the document set sensor 81 detects the absence of paper and the document discharge sensor 82 detects the completion of the document discharge. When the conveyance of all the set originals is not completed (No in step # 14), the original conveyance control unit 40 continues the conveyance of the originals (step # 15). Further, the reading control unit 50 continues reading the document (step # 16). Then, the flow returns to step # 14.

  When the conveyance of all the set originals is completed (Yes in step # 14), the original conveyance control unit 40 stops the original conveyance operation (step # 17). The document conveyance control unit 40 notifies the control unit 1 of the completion of document conveyance (step # 18). Based on this notification, the control unit 1 causes the image reading unit 5 to finish reading the document (step # 19). For example, the control unit 1 instructs the reading control unit 50 to finish reading the document. Then, this flow ends.

(Detection of jam of document transportation)
Next, an example of a flow of jam occurrence detection in the multifunction peripheral 100 according to the embodiment will be described with reference to FIG. FIG. 5 is a flowchart showing an example of a flow of jam occurrence detection in the multifunction peripheral 100 according to the embodiment. The flowchart of FIG. 5 is executed during the feed reading.

  The start in FIG. 5 is the time when the document conveyance is started. The document conveyance control unit 40 determines whether or not a document jam (clogging) has occurred (step # 21). The criteria for determining that a jam has occurred are set appropriately.

  For example, when the document detection sensor 83 cannot detect the arrival of the leading edge of the document even after a predetermined first time has elapsed from the start of feeding the document (start of rotation of the supply roller 42), the document conveyance control unit 40 causes the document conveyance control unit 40 to Jam (clogging) is determined to have occurred. The first time can be a time obtained by adding the first margin time to the first required time. The first required time is the time obtained by dividing the transport distance from the feeding start position at the leading edge of the document to the installation position of the document detection sensor 83 by the document transport speed according to the specifications. The first margin time is set in advance in consideration of slippage at each roller.

  Further, when the document detection sensor 83 cannot detect the passage of the trailing edge of the document even after a predetermined second time has elapsed from the detection of the leading edge of the document detection sensor 83, the document conveyance control unit 40 causes the document conveyance control unit 40 to jam the document. ) Has occurred. The second time can be a time obtained by adding the second required time and the second margin time. The second required time is a time obtained by dividing the length of the document in the transport direction by the document transport speed according to the specifications. Based on the output of a document size sensor (not shown) provided on the document tray 41, the document conveyance control unit 40 recognizes the length of the document in the conveyance direction. Further, the size of the original can be set on the operation panel 6. The document conveyance control unit 40 may recognize the length of the document in the conveyance direction based on the size of the document set on the operation panel 6. The second margin time is also set in advance in consideration of slippage at each roller.

  When the document conveyance control unit 40 does not recognize that a jam has occurred (No in step # 21), the document conveyance control unit 40 determines whether the conveyance of all documents has been completed (step # 22). When the conveyance of all originals is completed (Yes in step # 22), this flow ends (end). When the document remains on the document tray 41 (No in step # 22), the flow returns to step # 21.

  When the document conveyance control unit 40 recognizes that a jam has occurred (Yes in step # 21), the document conveyance control unit 40 notifies the control unit 1 and the reading control unit 50 of the jam (step # 23). Then, document transportation control unit 40 stops the transportation of the document (step # 24). In this case, the document feeding control unit 40 stops the document feeding motor 47. As a result, each roller stops. Further, based on the notification, the reading control unit 50 stops reading the document (step # 25).

  The image reading unit 5 notifies the control unit 1 of the current count value (step # 26). As a result, the control unit 1 recognizes the number of originals that have been read (the number of read sheets). In other words, the control unit 1 recognizes from the first document to the number of the original document in which the read image data D1 of the entire page is generated. Based on the notification, the control unit 1 causes the display panel 61 to display a jam occurrence (step # 27). Then, the process proceeds to the process when a jam occurs (step # 28 → end).

(Processing when a jam occurs)
Next, an example of the flow of processing when a jam occurs in the multi-function peripheral 100 according to the embodiment will be described with reference to FIGS. 2, 6, and 7. FIG. 6 is a flowchart showing an example of the flow of processing when a jam occurs in the multi-function peripheral 100 according to the embodiment. FIG. 7 is a diagram showing an example of the reset request screen 91 according to the embodiment.

  The start of FIG. 6 is the time when the controller 1 displays the jam occurrence. When the document is jammed, the user performs jam processing (step # 31). When performing the jam processing, the user opens the opening / closing part 48. In FIG. 2, a portion surrounded by a broken line is the opening / closing portion 48. The opening / closing part 48 is an upper part of the document transport path 43. The opening / closing part 48 can be opened upward. A rotating shaft 49 is provided below the opening / closing portion 48 for opening and closing. By opening the opening / closing part 48, the document transport path 43 is exposed. The original can be easily removed.

  Eventually, the document conveyance control unit 40 recognizes that the jam processing is completed (step # 32). After the opening / closing unit 48 is opened / closed, when the document detection sensor 83 does not detect the presence of a document, the document conveyance control unit 40 recognizes that the jam processing is completed. An opening / closing detection sensor 84 for detecting opening / closing of the opening / closing section 48 is provided (see FIG. 3). Based on the output of the open / close detection sensor 84, the document conveyance control unit 40 recognizes that the open / close unit 48 has been opened and closed.

  When recognizing the completion of the jam processing, the document conveyance control section 40 notifies the control section 1 of the jam processing completion (step # 33). Based on this notification, the control unit 1 displays the reset request screen 91 on the display panel 61 (step # 34).

  As shown in FIG. 7, the reset request screen 91 includes a message requesting to reset the original. Further, the reset request screen 91 includes a message to reset all originals. Based on this message, the user collects the documents that have been discharged to the document discharge tray 46, the documents that have been removed from the document transport path 43, and the documents that remain on the document tray 41. Then, the user resets all the originals on the original tray 41. When the resetting of all the originals is completed, the user operates the resetting complete button B1. Based on the output of touch panel 62, control unit 1 recognizes that the reset completion button B1 has been operated (step # 35). As a result, this flow ends (end), and the process proceeds to the reset document orientation confirmation process.

(Reorientation orientation confirmation process)
Next, with reference to FIG. 8, an example of a flow of a reset document orientation confirmation process in the multifunction peripheral 100 according to the embodiment will be described. FIG. 8 is a flowchart showing an example of the flow of the orientation confirmation processing of the reset document in the multifunction peripheral 100 according to the embodiment.

  It is necessary to reset the document after the jam occurs. The original may be set in the opposite direction from before the jam occurred. The more confused the user, the more likely mistakes will occur. Here, with respect to the read original, the read image data D1 obtained by the reading before the occurrence of the jam is used for the job. Therefore, when the document set again in the reverse direction is read, the orientation of the read image data D1 generated after the jam occurs is different from the orientation of the read image data D1 generated before the jam occurs. As a result, the result desired by the user may not be obtained. In order to match the orientations of the read image data D1 before and after the occurrence of the jam, the multifunction peripheral 100 performs a process of confirming the orientation of the original set again. The flow of document orientation confirmation processing will be described below.

  The start of FIG. 8 is the time when the reset completion button B1 is operated. In other words, this is the time when the control unit 1 restarts reading after all the originals have been reset in the original conveying unit 4 after the occurrence of the jam.

  First, based on the notified count value (step # 26, FIG. 5), the control unit 1 confirms the number of read sheets (the number of original documents for which the generation of the read image data D1 is completed) (step # 41). .. Then, the control unit 1 causes the document transport unit 4 to start transporting the first set of re-set documents to the discharge tray 46 from the read number of documents (step # 42). For example, when the number of read sheets is 5, the controller 1 conveys the first to fifth sheets of the reset document to the discharge tray 46.

  The control unit 1 sets any one of the first to the read number of originals of the reset originals as the confirmation target original. Then, the control unit 1 causes the image reading unit 5 to read the confirmation target document, which is any one of the read number of documents (read document) (step # 43). Note that among the originals to be conveyed, the originals other than the original to be confirmed are not read, and the originals are idly fed. In the present description, an example will be described in which the last document among the read number of documents is the document to be confirmed. For example, when the number of read pages is 10, the control unit 1 sets the 10th page as the confirmation target document. Note that the confirmation target document does not have to be the last page of the number of read documents. For example, when the number of read pages is 10, the control unit 1 may set the 9th page as the confirmation target document.

  At step # 43, control unit 1 notifies document conveyance control unit 40 and reading control unit 50 of the number of read sheets. Further, the control unit 1 notifies the document conveyance control unit 40 and the reading control unit 50 of the page number of the confirmation target document among the number of scanned documents. Based on this notification, the document feeding control unit 40 starts feeding the number of read documents. Further, based on this notification, the reading control unit 50 causes the reading unit 53 to read only the confirmation target document among the number of documents that have been read.

  By reading the confirmation target document, the image reading unit 5 generates image data of the confirmation target document (step # 44). In the following description, the read image data D1 corresponding to the confirmation target document obtained by the scanning before the occurrence of the jam is referred to as the first image data. When the confirmation target document is the Nth of the read number of documents, the read image data D1 of the Nth document is the first image data among the read image data D1 obtained by the scanning before the jam occurs. .. Further, the image data of the confirmation target document obtained by the reading after the document reading is restarted (after the document is reset) is referred to as second image data.

  The control unit 1 causes the document conveying unit 4 to complete the conveyance of the read number of originals from the first sheet of the reset originals (step # 45). After the conveyance is completed, control unit 1 temporarily stops the conveyance of the document (remaining document) remaining on document tray 41 (step # 46). The control unit 1 notifies the document conveyance control unit 40 and the reading control unit 50 that the document conveyance of the remaining document is stopped. Based on this notification, the document conveyance control unit 40 stops the document conveyance motor 47. As a result, the conveyance of the document is stopped. Note that the control unit 1 may stop the document conveyance while the first page of the remaining document is conveyed until the document detection sensor 83 detects it.

  The control unit 1 (image processing unit 12) compares the first image data and the second image data and makes a primary determination (step # 47). The primary determination is a determination as to whether the first image data and the second image data are the same. For example, the control unit 1 performs matching between the first image data and the second image data. Then, when the similarity is equal to or higher than a predetermined threshold value, the control unit 1 determines that the first image data and the second image data are the same. When the similarity is less than the predetermined threshold value, the control unit 1 determines that the first image data and the second image data are not the same.

  In addition, the control unit 1 (image processing unit 12) may perform the primary determination based on the results of the OCR processing of the first image data and the second image data. In this case, the control unit 1 extracts the character included in the first image data by the OCR process. Further, the control unit 1 extracts the character included in the second image data by the OCR process. When the matching rate of the extracted characters is equal to or higher than a predetermined rate, the control unit 1 determines that the first image data and the second image data are the same. When the matching rate is less than the predetermined rate, the control unit 1 determines that the first image data and the second image data are not the same.

  When it is determined that they are the same as each other in the primary determination (Yes in step # 47), the reset original can be regarded as the same as the original before the jam occurs. Further, the orientation of the set original before the occurrence of the jam and the orientation of the reset original can be regarded as the same. Therefore, control unit 1 causes document transport unit 4 to start transporting the remaining document (step # 48). The control unit 1 notifies the original document conveyance control unit 40 that the conveyance of the remaining original document has started. Based on this notification, the document conveyance control unit 40 causes the document conveyance motor 47 to start rotating. As a result, the remaining originals are conveyed one by one.

  Further, control unit 1 causes image reading unit 5 to read each remaining original document (step # 49). The control unit 1 notifies the reading control unit 50 of reading each remaining document. Based on this notification, the reading control unit 50 causes the reading unit 53 to read each page of the remaining document. As a result, the read image data D1 of each remaining document is generated. The control unit 1 does not rotate the read image data D1 of each remaining document (step # 410). Through steps # 48 to # 410, the read image data D1 having the same orientation can be obtained. Then, this flow ends (end). Thereafter, the job is executed based on the read image data D1 of each document.

  When it is determined that they are not the same in the primary determination (No in step # 47), the control unit 1 generates rotated image data obtained by rotating the second image data. Specifically, the control unit 1 rotates the second image data by 180 degrees. Then, the control unit 1 compares the first image data and the rotated image data and makes a secondary determination (step # 411). The secondary determination is a determination as to whether the first image data and the rotated image data are the same.

  The determination method may be basically the same as the primary determination. For example, the control unit 1 matches the first image data and the rotated image data. Then, when the similarity is equal to or more than the threshold value, the control unit 1 determines that the first image data and the rotated image data are the same. When the degree of similarity is less than the threshold value, the control unit 1 determines that the first image data and the rotated image data are not the same.

  Further, the control unit 1 (image processing unit 12) may make the secondary determination based on the result of the OCR process. In this case, the control unit 1 extracts the character included in the first image data by the OCR process. Further, the control unit 1 extracts the characters included in the rotated image data by the OCR process. When the matching rate of the extracted characters is equal to or higher than a predetermined rate, the control unit 1 determines that the first image data and the rotated image data are the same. When the matching rate is less than the predetermined rate, the control unit 1 determines that the first image data and the rotated image data are not the same.

  When it is determined by the secondary determination that they are not the same (No in step # 411), the reset original includes an original different from the original set before the jam. Therefore, control unit 1 causes the display unit to display a message for resetting the correct document (step # 412). Then, this flow ends (end). When the original is removed from the original tray 41 and the original is reset, the control unit 1 executes the present flow again from step # 41.

  When it is determined that they are the same as each other in the secondary determination (Yes in step # 411), the control unit 1 determines that the set original before jam occurrence and the reset original have different orientations (step # 413). Then, control unit 1 causes warning screen 92 to be displayed on display panel 61 (step # 414). In step # 414, the process proceeds to the remaining original reading setting process.

(Remaining original reading setting process)
Next, based on FIG. 9 to FIG. 11, the remaining document reading setting process in the multifunction peripheral 100 according to the embodiment will be described. FIG. 9 is a flowchart illustrating an example of the remaining document reading setting process according to the embodiment. FIG. 10 is a diagram showing an example of the warning screen 92 according to the embodiment. FIG. 11 is a diagram showing an example of the rotation confirmation screen 93 according to the embodiment.

  The start in FIG. 9 is the time when the warning screen 92 is displayed on the display panel 61 (step # 414 in FIG. 8). First, an example of the warning screen 92 will be described with reference to FIG. The control unit 1 displays a warning message M1M1 on the warning screen 92. The warning message M1 informs that the orientation of the set original before the jam is different from that of the reset original. Further, the control unit 1 displays the rotation reading button B2, the rotation unnecessary button B3, and the sequential confirmation button B4 in the warning screen 92.

  When the user wants to automatically rotate the read image data D1 of the remaining document, the user operates the rotation reading button B2. The touch panel 62 receives the operation of the rotation reading button B2 as a rotation reading instruction. When the touch panel 62 receives the rotation reading instruction, the control unit 1 (image processing unit 12) rotates all the read image data D1 of the remaining document by 180 degrees.

  When the user does not want to rotate the read image data D1 of the remaining document, the user operates the rotation unnecessary button B3. The touch panel 62 receives the operation of the rotation unnecessary button B3 as a rotation unnecessary instruction. When the touch panel 62 receives the rotation unnecessary instruction, the control unit 1 (image processing unit 12) does not rotate the read image data D1 of the remaining document. The read image data D1 corresponding to the orientation of the original at the time of resetting is obtained.

  When deciding whether or not to rotate one by one, the user sequentially operates the confirmation button B4. This is effective when the orientations of the remaining originals are separated. For example, it is effective when the original stack is dropped during the jam processing. The touch panel 62 receives the operation of the sequential confirmation button B4 as a sequential confirmation instruction. When the touch panel 62 receives the sequential confirmation instruction, the control unit 1 (image processing unit 12) rotates only the read image data D1 of which the user has selected rotation among the read image data D1 of the remaining document by 180 degrees. ..

  Based on the output of touch panel 62, control unit 1 confirms whether touch panel 62 has received the rotation reading instruction (step # 51). When the rotation reading instruction has not been received (No in step # 51), based on the output of the touch panel 62, the control unit 1 confirms whether or not the touch panel 62 has received the rotation unnecessary instruction (step # 52). When the rotation unnecessary instruction has not been received (No in Step # 52), the control unit 1 confirms whether or not the touch panel 62 successively receives the confirmation instruction based on the output of the touch panel 62 (Step # 53). When the sequential confirmation instruction has not been received (No in step # 53), the flow returns to step # 51.

  When touch panel 62 receives the rotation reading instruction (Yes in step # 51), control unit 1 causes document transport unit 4 to start transporting the remaining document (step # 54). The control unit 1 notifies the original document conveyance control unit 40 that the conveyance of the remaining original document has started. Based on this notification, the document conveyance control unit 40 causes the document conveyance motor 47 to start rotating. As a result, the remaining originals are automatically conveyed one by one to the last page.

  Further, control unit 1 causes image reading unit 5 to read each of the remaining originals (step # 55). The control unit 1 notifies the reading control unit 50 of the reading of the remaining document. Based on this notification, the reading control unit 50 causes the reading unit 53 to read each page of the remaining document. As a result, the read image data D1 of each remaining document is generated.

  Further, control unit 1 (image processing unit 12) rotates all read image data D1 of the remaining document (step # 56). The rotation angle is 180 degrees. As a result, the orientations of the read image data D1 of the read document and the read image data D1 of the remaining document can be automatically matched. There is no need to remove the re-set originals and set them again to match the orientation. Then, this flow ends (end).

  When touch panel 62 receives the rotation unnecessary instruction (Yes in step # 52), control unit 1 causes document transport unit 4 to start transporting the remaining document (step # 57). The control unit 1 notifies the original document conveyance control unit 40 that the conveyance of the remaining original document has started. Based on this notification, the document conveyance control unit 40 causes the document conveyance motor 47 to start rotating. As a result, the remaining originals are automatically conveyed one by one to the last page.

  Further, control unit 1 causes image reading unit 5 to read each of the remaining originals (step # 58). The control unit 1 notifies the reading control unit 50 of the reading of the remaining document. Based on this notification, the reading control unit 50 causes the reading unit 53 to read each page of the remaining document. As a result, the read image data D1 of each remaining document is generated. The control unit 1 does not rotate all the read image data D1 of the remaining document (step # 59).

  When touch panel 62 receives the sequential confirmation instruction (Yes in step # 53), control unit 1 conveys only one remaining document to document conveyance unit 4 (step # 510). The control unit 1 notifies the original document conveyance control unit 40 that the conveyance of one remaining original document has started. Based on this notification, the document conveyance control unit 40 conveys only one document. After the conveyance of one remaining document, the document conveyance control unit 40 stops the document conveyance motor 47 and the conveyance rotator. Even when the reading of one remaining original is completed, the original conveyance control unit 40 does not immediately start feeding the next remaining original (the supply roller 42 is not rotated).

  The control unit 1 causes the image reading unit 5 to read the one remaining document to be conveyed (step # 511). The control unit 1 notifies the reading control unit 50 of reading one remaining original document. Based on this notification, the reading control unit 50 causes the reading unit 53 to read one remaining original document. As a result, the read image data D1 of the remaining document is generated for one page.

  Then, control unit 1 causes rotation confirmation screen 93 to be displayed on display panel 61 (step # 512). FIG. 11 is a diagram showing an example of the rotation confirmation screen 93. The control unit 1 causes the rotation confirmation screen 93 to display the first reduced image i1. The first reduced image i1 is an image obtained by reducing the read image data D1 of the one remaining original document read most recently. The control unit 1 (image processing unit 12) thins out the read image data D1 to generate a first reduced image i1 having a predetermined size.

  The control unit 1 also displays the second reduced image i2 in the rotation confirmation screen 93. The second reduced image i2 is displayed as a material for determining the necessity of rotation. It is possible to determine whether or not to rotate by referring to the content of the immediately preceding page. The second reduced image i2 is an image obtained by reducing the read image data D1 of the document one page before the one remaining document read most recently. The control unit 1 (image processing unit 12) thins out the read image data D1 of the document one page before, and generates the second reduced image i2 having a predetermined size.

  When displaying the first reduced image i1 corresponding to the original on the first page of the remaining original, the control unit 1 also displays the second reduced image i2. In this case, the second reduced image i2 is a reduced image of the read image data D1 of the document of the last page of the read image data D1 generated before the occurrence of the jam. This makes it possible to confirm whether or not the number of read sheets is correct.

  Further, the control unit 1 displays the button B5 with rotation and the button B6 without rotation in the rotation confirmation screen 93. As a result of checking the first reduced image i1, when the read image data D1 is desired to be rotated, the user operates the rotation button B5. The touch panel 62 receives an operation on the rotation button B5 as a rotation instruction. As a result of checking the first reduced image i1, when the read image data D1 is not desired to be rotated, the user operates the no rotation button B6. The touch panel 62 receives an operation on the no rotation button B6 as a no rotation instruction.

  The controller 1 rotates or does not rotate the read image data D1 obtained by the reading in step # 511 (step # 513). The control unit 1 determines whether to rotate based on the operation on the rotation confirmation screen 93. When the touch panel 62 receives the rotation instruction, the control unit 1 rotates the read image data D1 corresponding to the first reduced image i1. The rotation angle is 180 degrees. When the operation unit receives the no rotation instruction, the control unit 1 does not rotate the read image data D1 corresponding to the first reduced image i1.

  Then, based on the output of document set sensor 81, control unit 1 confirms whether or not all the documents have been read (step # 514). When the originals remain on the original tray 41 (No in step # 514), the flow returns to step # 510. When all the originals have been read, this flow ends (END).

  In this way, the image reading apparatus (multifunction device 100) according to the embodiment includes the document feeding unit 4, the image reading unit 5, the storage unit 2, the display unit, the operation unit, and the control unit 1. The document feeder 4 conveys the documents set on the document tray 41 one by one. The image reading unit 5 reads the document conveyed by the document conveying unit 4 and generates the read image data D1. The storage unit 2 stores the read image data D1. The display unit displays. The operation unit receives a user operation. The control unit 1 recognizes the number of read sheets, which is the number of originals that can read the entire page in the reading before the occurrence of the jam. After the occurrence of a jam, when restarting the reading in the state where all the originals are reset in the original conveying unit 4, the control unit 1 determines which one of the read originals from the first original of the reset originals. Set one original as the original to be checked. The control unit 1 conveys the read number of originals to the original conveyance unit 4. The control unit 1 does not allow the image reading unit 5 to read originals other than the confirmation target originals among the number of originals that have been read. The control unit 1 causes the image reading unit 5 to read only the confirmation target document. After feeding the read number of originals, the control unit 1 causes the original conveyance unit 4 to temporarily stop the conveyance of the remaining originals that are the originals remaining on the original tray 41. The control unit 1 reads the first image data, which is the read image data D1 corresponding to the confirmation target document obtained by the reading before the occurrence of the jam, and the second image data obtained by reading the confirmation target document after the reading is restarted. Compare. The control unit 1 determines whether or not the orientation of the document is different based on the comparison between the first image data and the second image data. When determining that the orientations of the originals are different, the control unit 1 displays a warning on the display unit.

  As a result, it is possible to detect that the orientation of the document set again after the jam has occurred is different from the orientation of the document set before the jam has occurred. Then, the user can be warned that the orientation is different. Therefore, when a jam occurs, it is possible to prevent an error in resetting the document. Further, the orientation of the read image data D1 generated before the occurrence of the jam and the orientation of the read image data D1 of the remaining document can be matched.

  After the warning is displayed, when the operation unit receives the rotation reading instruction, the control unit 1 causes the document transport unit 4 to start transporting the remaining document. The control unit 1 causes the image reading unit 5 to read the remaining document. The control unit 1 rotates the read image data D1 of the remaining document. The control unit 1 matches the orientations of the read image data D1 generated before the occurrence of the jam and the read image data D1 of the remaining document. As a result, all the read image data D1 of the remaining document can be automatically rotated. The user only has to give a rotation reading instruction. Even if the orientation is set wrong and the original is reset, the orientations of all the read image data D1 can be automatically matched. That is, even if the orientation of the reset document is different from that before the occurrence of the jam, the read image data D1 having the same orientation can be obtained. There is no need to reload the original. The work load on the user can be reduced.

  Further, after the warning is displayed, when the operation unit receives the rotation unnecessary instruction, the control unit 1 causes the document transport unit 4 to start transporting the remaining document. The control unit 1 causes the image reading unit 5 to read the remaining document. The control unit 1 does not rotate the read image data D1 of the remaining document. As a result, the read image data D1 of the remaining document can be prevented from rotating. The user only has to give an instruction not to rotate. It is possible to read according to the wishes of the user.

  When comparing the first image data and the second image data, the control unit 1 makes a primary determination to determine whether the first image data and the second image data are the same. When it is determined that they are not the same in the primary determination, the control unit 1 generates rotated image data obtained by rotating the second image data. The control unit 1 performs a secondary determination that determines whether the first image data and the rotated image data are the same. When it is determined that they are the same in the secondary determination, the control unit 1 determines that the orientation of the document is different. When it is determined in the secondary determination that they are not the same, the control unit 1 causes the display unit to display a message for resetting the correct document. As a result, it is possible to accurately determine whether the orientation of the set original before the jam occurs and the orientation of the reset original after the jam occurs are different. It is also possible to accurately determine whether or not the contents of the set original document before the jam and the contents of the reset original document match. It is also possible to inform the user that the set original before jam occurrence and the original set again do not match.

  When it is determined that they are the same in the primary determination, the control unit 1 causes the document transport unit 4 to start transporting the remaining document. The control unit 1 causes the image reading unit 5 to read the remaining document. The control unit 1 does not rotate the read image data D1 of the remaining document. As a result, when the contents of the set original before jam occurrence and the contents of the reset original match and the orientations are also the same, normal reading of the remaining original can be resumed.

  After the warning is displayed, when the operation unit receives the sequential confirmation instruction, the control unit 1 conveys only one of the remaining originals each time the sequential confirmation instruction, the rotation instruction, or the non-rotation instruction is received. It is conveyed to the section 4. The control unit 1 causes the image reading unit 5 to read one conveyed remaining original document. Every time the remaining document is read, the control unit 1 causes the display unit to display the first reduced image i1 obtained by reducing the read image data D1 obtained by reading the remaining document. After the display of the first reduced image i1, when the operation unit receives an instruction to rotate, the control unit 1 rotates the read image data D1 corresponding to the first reduced image i1. After the display of the first reduced image i1, when the operation unit receives the no rotation instruction, the control unit 1 does not rotate the read image data D1 corresponding to the first reduced image i1. As a result, it is possible to select whether to rotate the read image data D1 for each remaining document one by one. It is also possible to display a reduced image (first reduced image i1) of the read image data D1 of each remaining document. Therefore, it is possible to accurately rotate only a document whose orientation is reversed. When the user wants to rotate the read image data D1, the user only needs to give an instruction to rotate. When the user does not want to rotate the read image data D1, the user only needs to give the no rotation instruction.

  Further, when displaying the first reduced image i1 corresponding to the original of the first page of the remaining originals, the control unit 1 controls the first reduced image i1 and the read image data D1 generated before the occurrence of the jam. , The second reduced image i2 which is the reduced image of the read image data D1 of the document of the last page is displayed. This makes it easy to determine whether or not the orientation of the set original before the occurrence of the jam (first) and the orientation of the reset original are different.

  Further, the document to be confirmed is the last document among the read number of documents to be conveyed when the reading is restarted after the jam occurs. Thus, it is possible to determine whether or not the orientation of the set original before jam occurrence (first) and the orientation of the reset original are different based on the original that is closest in order to the remaining original. Further, it is possible to quickly convey a document to be conveyed when reading is restarted.

  Further, the control unit 1 rotates the read image data D1 by 180 degrees when rotating the read image data D1. As a result, even if the orientation of the set original before the jam occurrence (first) and the orientation of the reset original are different, the orientations of the read image data D1 of all the originals can be matched.

  INDUSTRIAL APPLICABILITY The present invention can be applied to an image reading device (image forming device).

100 multifunction peripheral (image reading device) 1 control unit 2 storage unit 4 document feeding unit 41 document tray 5 image reading unit 61 display panel (display unit) 62 touch panel (operation unit)
63 hard key (operation unit) 100 multi-function peripheral (image reading device)
D1 read image data i1 first reduced image i2 second reduced image

Claims (8)

A document transport unit that transports the documents set on the document tray one by one,
An image reading unit that reads a document conveyed by the document conveying unit and generates read image data;
A storage unit for storing the read image data,
A display unit for displaying,
An operation unit that accepts user operations,
Recognize the number of read pages, which is the number of originals that could read the entire page in the scan before the jam occurred,
After the occurrence of a jam, when restarting scanning with all originals reset in the original transport section,
From the first set of re-set originals to the read number of originals, one of the originals is set as the original to be confirmed,
The originals of the number of read sheets are conveyed to the original conveying section,
Of the number of read documents, the image reading unit does not read documents other than the confirmation target document, and only the confirmation target document is read by the image reading unit,
After conveying the originals of the number of read sheets, the conveyance of the remaining originals, which are the originals remaining on the original tray, is temporarily stopped by the original conveying unit,
The first image data, which is the read image data corresponding to the confirmation target document obtained by reading before the occurrence of the jam, is compared with the second image data obtained by reading the confirmation target document after resuming reading. ,
Based on the comparison between the first image data and the second image data, it is determined whether the orientation of the original is different,
When the orientation of the document is determined to differ, seen including a control unit to display a warning on the display unit,
After the warning is displayed, when the operation unit accepts the sequential confirmation instruction,
The control unit is
Whenever the sequential confirmation instruction, the rotation instruction, or the non-rotation instruction is received, only one of the remaining originals is conveyed to the original conveyance unit,
Make the image reading unit read one of the remaining originals conveyed,
Every time the remaining original is read, a first reduced image obtained by reducing the read image data obtained by reading the remaining original is displayed on the display unit,
After the display of the first reduced image, when the operation unit receives the instruction to rotate, the read image data corresponding to the first reduced image is rotated,
An image reading apparatus, which does not rotate the read image data corresponding to the first reduced image when the operation unit receives the no rotation instruction after displaying the first reduced image . When the operation unit receives a rotation reading instruction after the warning is displayed,
The control unit is
Cause the document transport unit to start transporting the remaining document,
Make the image reading section read the remaining original,
Rotating the read image data of the remaining document,
The image reading apparatus according to claim 1, wherein the read image data generated before the occurrence of the jam and the read image data of the remaining document are oriented in the same direction. After the warning is displayed, when the operation unit receives a rotation unnecessary instruction,
The control unit is
Cause the document transport unit to start transporting the remaining document,
Make the image reading section read the remaining original,
The image reading apparatus according to claim 1, wherein the read image data of the remaining document is not rotated. When comparing the first image data and the second image data,
The control unit is
A primary determination is performed to determine whether the first image data and the second image data are the same,
When it is determined that they are not the same in the primary determination, rotation image data generated by rotating the second image data is generated,
A second determination is performed to determine whether the first image data and the rotated image data are the same,
When it is determined that they are the same in the secondary determination, it is determined that the orientation of the document is different,
4. The image reading apparatus according to claim 1, wherein when the secondary judgments indicate that the originals are not the same, a message requesting the correct original to be reset is displayed on the display unit. When it is judged as the same in the primary judgment,
The control unit is
Cause the document transport unit to start transporting the remaining document,
Make the image reading section read the remaining original,
The image reading apparatus according to claim 4, wherein the read image data of the remaining document is not rotated. When displaying the first reduced image corresponding to the original of the first page of the remaining originals,
The control unit displays, together with the first reduced image, a second reduced image which is a reduced image of the read image data of the document of the last page of the read image data generated before the occurrence of the jam. the image reading apparatus according to any one of claims 1 to 5, characterized in that. The check target document after jam, out of the document of the read already number conveys when reading resumes, the image reading apparatus according to any one of claims 1 to 6, characterized in that a last document .. Wherein, when rotating the scanned image data, the image reading apparatus according to any one of claims 1 to 7, characterized in that 180 degree rotation.

Images