JP6652085B2 - Image forming apparatus, image forming method, and program - Google Patents

Description

This invention relates to an image forming apparatus capable of determining a failure of the image based on the read result of the media body, an image forming method and a program.

  In the field of image forming apparatuses such as copiers, printers, and multifunction machines, image abnormality and image quality adjustment are determined using image reading data obtained by reading an image on a sheet. For example, the read image is compared with the image data for printing, and when the printed image does not match, an abnormality is determined, or the adjustment image is printed on an inserted sheet of paper or a cutting margin, and is read. 2. Description of the Related Art Devices capable of adjusting image quality are known. Also, when reading the adjustment image, it is possible to determine the abnormality of the image due to adjustment failure or the like. If it is determined that the image is abnormal, the image is determined to be scrambled. Usually, output is stopped, and the scrambled sheet is discharged to a different destination than usual. In addition, if output is stopped, there is a problem that productivity is reduced, and it is demanded that output be continued without stopping output even after a yaw is detected.

  For example, in Patent Document 1, when it is determined that a sheet on which an image has been formed is a defective page, the sheet determined to be a defective page and other sheets in the machine are discharged as waste paper. A page including information on a waste sheet such as a defect occurrence event is discharged to a discharge destination immediately before the defect determination, the discharge destination is changed to a discharge destination different from that immediately before the defect determination, and a page corresponding to the waste sheet is re-read. Continue printing and subsequent pages. In this operation, the user can remove the waste paper after printing, using a page including information on the waste paper as a mark.

  Patent Document 2 discloses that in a system for inspecting the result of image formation output, a normally output page, a page for which a defect is determined, and a page for which recovery printing is performed are respectively discharged to different discharge trays. Have been.

JP 2014-144627 A JP 2015-179122 A

  As described above, after all of the paper in the machine that has been fed has been discharged, mark paper with information on the detected sheet (eg, detection of the previous 5 sheets) is output, and the image forming operation is performed. Control (this is referred to as `` continuous output after detection of spalling '') is a control that stops the machine after all the paper in the machine has been fed and displays information on the operation unit (this is called `` Stop after detection of spalling ''). Control), the recovery output can be started immediately, which has the effect of reducing the machine idle time.

  However, when there are a plurality of discharge destination trays of the fed paper in the machine, there is a risk that the user does not notice the mark paper and fails to remove the waste paper in the continuous output control after the failure detection. In particular, when the destination of the fed paper in the machine is a large-capacity stacker tray and the large-capacity stacker tray is switched by the tray full, the control of Patent Document 1 discloses a large switcher that discharges a page in which a crack is detected. The output of the mark sheet to the capacity stacker tray is performed.

  If the marker paper is output to the large-capacity stacker tray at the switch source ignoring the tray full alarm, all the waste paper at the switch source can be removed, but the pages to be removed from the large-capacity stacker tray at the switch destination are recognized. There is no means. On the other hand, if the marker sheet is output to the large-capacity stacker tray at the switch destination in accordance with the tray full alarm, it is possible to remove the pages at the switch source and the switch destination by going back from the marker sheet. However, as a use case of the large-volume stacker tray, it is conceivable to operate the large-volume stacker tray that has become full during output and then sequentially output the output to the subsequent process. In taking out the output from the capacity stacker tray, it is difficult to notice the mark sheet output to the large capacity stacker tray at the switch destination.

The present invention has been made to the problem as background, bad been judged medium body image forming apparatus capable of facilitating the removal of, and an object thereof is to provide an image forming method, and a program.

That is, of the image forming apparatus of the present invention, the first embodiment includes an image forming unit for forming an image on a medium body based on the job,
A conveying unit that conveys the medium body,
A control unit that controls the image forming unit and the transport unit,
Wherein the control unit, the apparatus has the functions of the determination to defect determination whether to acquire an image reading result of the medium which is a picture of at least the medium body defective, it is determined that the image is defective by the defect determination In this case, after the determination of the failure, it is possible to perform a pre-purge for discharging the medium remaining in the apparatus ,
After determination of the defective, before the pre-purge completion, if there is switching of the discharge destination for discharging a medium body, relates to each of the discharge destination that is discharged after the determination of the defective, notifies the occurrence of the defective characterized in that it.

Another aspect of the invention of an image forming apparatus includes: an image forming unit that forms an image on a medium based on a job;
A transport unit that transports the medium,
A control unit that controls the image forming unit and the transport unit,
The control unit has a defect determination function of acquiring an image reading result of the medium and determining at least whether the image of the medium is defective, and when the image is determined to be defective by the defect determination. After the determination of the failure, it is possible to perform a pre-purge for discharging the medium remaining in the apparatus,
The control unit, after the determination of the failure, before the completion of the pre-purge, if there is no switching of the discharge destination for discharging the medium, after the completion of the pre-purge, executes a continuous printing at the time of failure to continue the job,
If the continuous printing at the time of failure is selected, but after the determination of the failure, before the completion of the pre-purge, if there is a change in the discharge destination for discharging the medium, the job is stopped after the completion of the pre-purge. Features.

Invention of another embodiment of the image forming apparatus, the present invention of the embodiment, the control unit after stopping the job, to print continuously image formation based on the job receiving restart instruction of the operator Features.

Invention other forms of image forming apparatus, the present invention of the embodiment, the control unit is characterized by performing after stopping the job, is et to the notification of the failure occurrence.

Invention of the image forming apparatus according to still another embodiment, the present invention of the embodiment, the control unit after the determination of the defective, before stopping the job is characterized in that it does not notify the occurrences of poor .

Another aspect of the invention of an image forming apparatus includes:
An image forming unit that forms an image on a medium based on a job;
A transport unit that transports the medium,
A control unit that controls the image forming unit and the transport unit,
The control unit has a defect determination function of acquiring an image reading result of the medium and determining at least whether the image of the medium is defective, and when the image is determined to be defective by the defect determination. It is possible to perform continuous printing at the time of failure to continuously perform image formation based on a job,
After the determination of the failure, if there is a change of the discharge destination for discharging the medium before the continuous printing at the time of the failure, the occurrence of the failure occurs for each of the switched destinations before the continuous printing at the time of the failure. Is notified.

  According to another aspect of the invention of the image forming apparatus according to the above aspect of the invention, the control unit performs the continuous printing at the time of failure after the completion of the notification.

Invention other forms of image forming apparatus, the present invention of the embodiment, wherein, when performing in medium member serves as a mark notification of failure occurrence, relative to the sheet discharge before switching discharge destination, discharge characterized by discharging the become medium body landmarks or without Kamisaki full detection.

Invention other forms of image forming apparatus, the present invention of the embodiment, the control unit is notified of the failure occurrence, and carrying out the media body as a landmark.

Invention other forms of image forming apparatus, the present invention of the embodiment, the mark to become medium body includes a media body used in the job, the paper type, size, color, the media of the paper discharge It is characterized by being different in one or more of the directions.

Invention other forms of image forming apparatus, the present invention of the embodiment, the control unit, the notification, and characterized by indicating the number removal of media bodies in the discharge destination.

Invention other forms of image forming apparatus, the present invention of the embodiment, the control unit, as the notification, to indicate the number removed relative to the last output the media body before the defective Continuation printing It is characterized by.

An image forming apparatus according to another aspect of the present invention includes a display unit according to the aspect of the invention,
The control unit displays the notification on the display unit.

  According to another aspect of the invention of the image forming apparatus, in the above aspect of the invention, the control unit performs the notification through a network connected to the image forming apparatus.

According to another aspect of the invention of the image forming apparatus according to the aspect of the invention, the control unit acquires discharge destination switching information transmitted from a discharge unit having a plurality of discharge destinations. I do.

  In another aspect of the invention of the image forming apparatus according to the present invention, the control unit switches the paper discharge destination by controlling a paper discharge unit having a plurality of paper discharge destinations.

According to another aspect of the invention of the image forming apparatus, in the above aspect of the invention, the control unit starts the failure continuous printing in response to an instruction from an operator.

In the image forming method of the present invention, the first embodiment is an image forming method for forming an image on a medium body based on the job,
A step of defect determination to determine whether the image of at least said medium acquires image reading result of the medium body is defective,
If the image is determined to be defective in the step of determining a defect, a step of performing a pre-purge for discharging the medium remaining in the apparatus after the determination of the defect ;
After determination of the defective, before the pre-purge completion, if there is switching of the discharge destination for discharging a medium body, relates to each of the discharge destination that is discharged after the determination of the defective, notifies the occurrence of the defective and having a Sources step, the.
Another aspect of the present invention is an image forming method for forming an image on a medium based on a job,
A failure determination step of acquiring an image reading result of the medium and determining whether at least the image of the medium is defective,
If the image is determined to be defective in the step of determining a defect, a step of performing a pre-purge for discharging the medium remaining in the apparatus after the determination of the defect;
After the completion of the pre-purge, if there is no change of the discharge destination for discharging the medium before the completion of the pre-purge, the failure-time continuous printing is performed after the completion of the pre-purge.
Stopping the job after the completion of the pre-purge, when the failure-time continuation printing is selected, but after the determination of the failure, before the completion of the pre-purge, when the discharge destination for discharging the medium is changed. , Is characterized by having.

Of the programs of the present invention, the first embodiment is a program executed by a computer that controls an image forming unit for forming an image on a medium body based on the job, and a transport unit for transporting the medium body,
A step of defect determination to determine whether the image of at least the medium body acquires image reading result of the medium body is defective,
If the image is determined to be defective in the step of determining a defect, a step of performing a pre-purge for discharging the medium remaining in the apparatus after the determination of the defect ;
After determination of the defective, before the pre-purge completion, if there is switching of the discharge destination for discharging a medium body, relates to each of the discharge destination that is discharged after the determination of the defective, notifies the occurrence of the defective And a program for causing the computer to execute the steps.
Another form of the invention of a program is a program that is executed by a computer that controls an image forming unit that forms an image on a medium based on a job and a transport unit that transports the medium,
A failure determination step of acquiring an image reading result of the medium and determining whether at least the image of the medium is defective,
If the image is determined to be defective in the step of determining a defect, a step of performing a pre-purge for discharging the medium remaining in the apparatus after the determination of the defect;
After the completion of the pre-purge, if there is no change of the discharge destination for discharging the medium before the completion of the pre-purge, the failure-time continuous printing is performed after the completion of the pre-purge.
Stopping the job after the completion of the pre-purge, when the failure-time continuation printing is selected, but after the determination of the failure, before the completion of the pre-purge, when the discharge destination for discharging the medium is changed. , On the computer.

  According to the present invention, it is possible to easily remove unnecessary transfer media from the discharge destination when the discharge destination of the transfer medium is switched after the defect of the image is determined. Become.

FIG. 1 is a diagram showing a mechanical outline of an image forming apparatus according to an embodiment of the present invention. FIG. 3 is a block diagram illustrating an electrical configuration of the image forming apparatus 1. 6 is a flowchart illustrating an operation procedure after a defect is detected in the image forming apparatus. FIG. 5 is a flowchart illustrating a procedure including a procedure for stopping output when there is a discharge tray switch after the detection of a defect in the image forming apparatus according to the embodiment of the present disclosure. Similarly, FIG. 11 is a flowchart illustrating a procedure including a procedure for discharging a mark sheet to each discharge destination when there is a discharge tray switch after the detection of a failure. Similarly, it is a flowchart including a procedure for stopping output and a procedure for performing continuous output when there is a discharge tray switch after the detection of a failure. FIG. 9 is a schematic diagram illustrating an operation of discharging the mark sheet after the detection of the tear after the detection of the tear. Similarly, FIG. 11 is a schematic diagram illustrating an operation of stopping output of a job and displaying information of paper removal when a paper ejection tray switch is detected after a failure is detected. FIG. 9 is a schematic diagram illustrating an operation of outputting a mark sheet of each sheet discharge destination and discharging the sheet when there is a sheet discharge tray switch after the detection of a failure.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a diagram illustrating a mechanical configuration of an image forming apparatus 1 according to an embodiment.
The image forming apparatus 1 includes, in order from the upstream side in the sheet conveying direction, a sheet feeding unit 60, an apparatus main body 10, an image reading device 20, a first sheet discharging device 30, a second sheet discharging device 40, and a post-processing device 50. It has a configuration that is mechanically and electrically connected. Paper transport and communication are possible between the devices.

  The paper supply unit 60 stores paper, and supplies the paper to the transport path 13 of the apparatus main body 10. Note that the paper corresponds to the transfer medium of the present invention. In the present invention, the transfer medium is not limited to paper, and a transfer medium made of another material may be used. For example, a transfer medium made of cloth or plastic may be used.

  The apparatus main body 10 has a transport path 13 in a housing. The transport path 13 is connected to the paper feed unit 60 on the upstream side and connected to the image reading device 20 on the downstream side. The image forming unit 11 is provided in the middle of the transport path 13. A main body paper feed unit 12 for storing paper is provided below the housing of the apparatus main body 10, and feeds the stored paper to the transport path. The paper corresponds to the transfer medium of the present invention.

The transport path 13 transports the paper supplied from the paper supply unit 60 or the main body paper supply unit 12, and prints an image on the paper in the image forming unit 11. The image forming unit 11 includes an LD, a charger, a photoreceptor for each color, a developing unit, an intermediate transfer belt, a secondary transfer unit, a fixing unit, and the like, and forms an image by an electrophotographic method.
That is, the image forming unit 11 has photoconductors for each color, for example, for each color (cyan (C), magenta (M), yellow (Y), black (K)). , A charger, an LD, and a developing unit (not shown) are provided. Further, the image forming section 11 has an intermediate transfer belt, a secondary transfer section, and a fixing device. The intermediate transfer belt transfers the image on each photoconductor, and the secondary transfer unit transfers the image on the intermediate transfer belt to a sheet. The fixing device is disposed in the transport path 13 on the downstream side of the secondary transfer unit, and applies heat or pressure to the sheet to fix an image on the sheet.
In the present embodiment, a color printing machine is assumed, but the present invention is not limited to this, and may be an image forming apparatus capable of printing only in a single color such as monochrome.

In the transport path 13, a reverse transport path 13 a is branched on the downstream side of the image forming unit 11. A reversing section 13b is provided in the middle of the reversing conveyance path 13a, and the downstream side of the reversing conveyance path 13a joins the conveyance path 13 at a position upstream of the image forming section 11.
In the transport path 13, an image can be formed in the image forming unit 11 on the upper surface of the sheet transported in the transport path 13. When an image is formed on the back side of the sheet, the sheet after the image formation is sent to the reversing conveyance path 13a, and the sheet is reversed by the reversing unit 13b, and the sheet is turned upside down to the downstream side of the reversing conveyance path 13a. Then, the image is returned to the transport path 13 on the upstream side of the image forming section 11 to form an image on the back surface of the sheet.

Further, the apparatus main body 10 has an operation unit 140 at the upper part of the housing. The operation unit 140 is capable of displaying information and inputting operations, and has a display unit and an operation unit. The display unit and the operation unit may be integrated by using an LCD provided with a touch panel.
In addition, an inflow type automatic document feeder (ADF) 14 is provided in the upper part of the housing. The in-flow type automatic document feeder (ADF) 14 automatically feeds a set document and reads it with a scanner (not shown). The reading of the document can be performed on a platen glass (not shown).
The apparatus main body 10 has a control unit 100 that controls the entire image forming apparatus 1. The control unit 100 includes a CPU, a program operating on the CPU, a storage unit, and the like. The hardware of the control unit 100 corresponds to a computer that executes the program of the present invention.

The image reading device 20 has a transport path 23. The transport path 23 is connected to the transport path 13 of the apparatus main body 10 on the upstream side and to the first paper discharge device 30 on the downstream side.
An image reading unit 24 that reads the lower surface of the paper being transported along the transport direction and an image reading unit 25 that reads an image on the upper surface of the paper are provided in this order along the transport path 23.
The image reading units 24 and 25 can be configured by a CCD sensor, a CMOS sensor, or the like, and optically read an image on a sheet. Note that the image reading units 24 and 25 may be line sensors that can read the entire surface of the paper, or may be colorimeters that read images on the paper at points.

The result of reading the paper is transmitted to the control unit 100. The control unit 100 can determine the defect of the image on the sheet based on the reading result read by the image reading units 24 and 25.
Although the present embodiment has a configuration including two image reading units, the present invention is not limited to the number of image reading units, and may include only one image reading unit. It may have three or more. The types of the plurality of image reading units may be different from each other.
Further, the image reading device 20 is provided with a reversing conveyance path, and after one side of the sheet is read by one image reading section, the sheet is reversed on the reversing conveyance path, and the back side of the sheet is re-formed by the image reading section. The configuration may be such that the image is read on the side.

  The first paper discharge device 30 has a transport path 33, and the transport path 33 is connected to the transport path 23 of the image reading device 20 on the upstream side and to the second transport apparatus 40 on the downstream side. In the middle of the transport path 33, the paper discharge transport path 33a branches, and the first large-capacity stacker tray 31 is connected to the paper discharge transport path 33a. When the paper is discharged to the first large-capacity stacker tray 31, the destination of the paper sent in the transport path 33 is set to the paper-discharge transport path 33a side, and the paper is transported in the paper-discharge transport path 33a. 31. When the sheet is not transported to the first large-volume stacker tray 31, the destination is straightened, and the sheet is transported to the second sheet discharging device 40 through the transport path 33.

  The first large-capacity stacker tray 31 can include a full load sensor (not shown) that detects whether the upper end of the paper stacked on the tray has reached the full load position. Further, the control unit 100 may detect the full load on the tray based on the maximum number of printable sheets calculated from the paper basis weight being output or the like. It should be noted that the full load detection position has some margin, and in practice, several sheets can be stacked thereafter. The detection result of the full load is transmitted to the control unit 100 or is grasped by the control unit 100. The control unit 100 controls the destination of the paper based on the paper discharge conditions of the job, the detection result of the full load, and the like. In the paper discharge of the mark paper, the output is performed even if the output to the tray is impossible (tray full). It is possible to implement.

The second paper discharge device 40 has a transport path 43, and the transport path 43 is connected to the transport path 33 of the first paper discharge apparatus 30 on the upstream side and connected to the post-processing apparatus 50 on the downstream side. I have. In the middle of the conveyance path 43, the paper discharge conveyance path 43a is branched, and the second large-capacity stacker tray 41 is connected to the paper discharge conveyance path 43a. When the paper that has passed through the first paper discharging device 30 is discharged to the second large-capacity stacker tray 41, the destination of the paper sent in the transport path 43 is set to the discharge transport path 43a side, and the paper is transported in the discharge transport path 43a. The sheet is conveyed and stacked on the second large-capacity stacker tray 41. When the sheet is not conveyed to the second large-capacity stacker tray 41, the destination is straightened and the sheet is conveyed to the post-processing device 50 through the conveyance path 43.
The second large-capacity stacker tray 41 can include a full load sensor (not shown) that detects whether the upper end of the paper stacked on the tray has reached the full load position. Further, the control unit 100 may detect the full load on the tray based on the maximum number of printable sheets calculated from the paper basis weight being output or the like. It should be noted that the full load detection position has some margin, and in practice, several sheets can be stacked thereafter. The detection result of the full load is transmitted to the control unit 100 or is grasped by the control unit 100. The control unit 100 controls the destination of the paper based on the paper discharge conditions of the job, the detection result of the full load, and the like. In the paper discharge of the mark paper, the output is performed even if the output to the tray is impossible (tray full). It is possible to implement.
The first large-capacity stacker tray 31 and the second large-capacity stacker tray 41 correspond to the discharge destination of the present invention.

The post-processing device 50 has a transport path 53, and the transport path 53 is connected to the transport path 43 of the second sheet discharging device 40 on the upstream side. The post-processing device 50 has a discharge tray 51 and a discharge tray 52 as discharge destinations.
The post-processing conveyance path 53a branches in the middle of the conveyance path 53, and the post-processing conveyance path 53a is connected to the post-processing unit 54. The downstream side of the transport path 53 is connected to the paper discharge tray 51.
The post-processing unit 54 is configured to perform predetermined processing such as stapling, punching, and saddle stitching, and may perform a plurality of post-processing. The sheet that has passed through the post-processing unit 54 is discharged to the second discharge tray 52.
When post-processing is not performed in the post-processing device 50, the sheet is conveyed straight through the conveyance path 53 and discharged to the first discharge tray 51. When the post-processing is performed, the sheet is sent from the conveyance path 53 to the post-processing conveyance path 53 a, subjected to a predetermined post-processing by the post-processing unit 54, and discharged to the second discharge tray 52.
The first discharge tray 51 and the second discharge tray 52 correspond to a discharge destination of the present invention.

  An external device 4 such as a PC is connected to the apparatus main body 10. The external device 4 can communicate with the image forming apparatus 1 by connecting to the network 3, and can transmit job data and control the image forming apparatus 1. The external device 4 has a communication unit (not shown) connected to the network 4. Note that the network between the external device 4 and the image forming apparatus 1 may be configured by wireless or WAN, and is not limited to a specific one.

  In the present embodiment, the transport path in the paper feeding unit 60, the transport path 13 of the apparatus main body 10, the transport path 23 of the image reading device 20, the transport paths 33 and 33 a of the first paper output device 30, and the second paper output device 40 The transport paths 33 and 33a of the post-processing device 50 and the transport paths 53 and 53a of the post-processing device 50 correspond to the transport unit of the present invention, and are controlled by the control unit 100.

The image forming apparatus 1 according to the present embodiment includes a sheet feeding unit 60, an apparatus main body 10, an image reading device 20, a first sheet discharging device 30, a second sheet discharging device 40, and a post-processing device 50. However, according to the present invention, the number and types of devices connected to the device main body 10 are not limited thereto. For example, the apparatus may not include a post-processing device, or may include three or more paper discharge devices.
Further, the image forming apparatus may be configured by only the apparatus main body, and the image reading apparatus and the sheet discharging apparatus may be connected to the image forming apparatus.

Next, a functional configuration of the image forming apparatus 1 will be described with reference to a block diagram of FIG.
The image forming apparatus 1 includes a control block 110, a scanner unit 130, an operation unit 140, a printer unit 150, and a print controller 160.
The print controller 160 receives and processes image data input from the external device 4 used as a terminal PC via the network 3, or transfers image data obtained by the scanner unit 130 to the external device 4 or the like via the network 3. enable.

  The control block 110 has a PCI bus 112 connected to the print controller 160, and a DRAM control IC 111 is connected to the PCI bus 112. An image memory (DRAM) 120 is connected to the DRAM control IC 111. The image memory (DRAM) 120 has a compression memory 121 for storing compressed image data and a decompression memory 122 for temporarily storing non-compressed image data to be printed before image formation.

Further, a hard disk (HDD) unit 123 is connected to the DRAM control IC 111, and the hard disk (HDD) unit 123 stores image data obtained by the scanner unit 130, image data obtained by the print controller 160, and the like. I do.
The image data obtained by the print controller 160 and the image data stored in the hard disk (HDD) unit 123 are transmitted to the DRAM control IC 111 through the PCI bus 112 in accordance with the print operation.

The control block 110 includes a control CPU 113, and a DRAM control IC 111 is connected to the control CPU 113.
Further, a program memory (ROM) 114, a system memory (RAM) 116, and a nonvolatile memory 115 are connected to the control CPU 113. The program memory (ROM) 114 is configured by a ROM, and stores a program for operating the control CPU 113 and the like. The system memory (RAM) 116 is configured by a RAM and is used as a work area or the like. It is composed of a nonvolatile memory 115 and a flash memory.

The non-volatile memory 115 stores initial setting information of the apparatus main body 10, machine setting information such as process control parameters, post-processing settings, sheet information data, tray setting information, and failure determination based on the results of reading by the image reading units 24 and 25. Setting information such as a method and a discharge destination switching condition is stored. In addition, the non-volatile memory 115 can store a discharge destination of the waste paper when a defect of the paper is detected.
The control CPU 113 can read non-volatile data in the non-volatile memory 115, and can write desired data to the non-volatile memory 115.

The control CPU 113 executes a predetermined operation by a program stored in a program memory (ROM) 114, and according to the machine setting information, the print setting information, the output setting, and the like, the sheet feeding device 60, the apparatus main body 10, the image reading device 20. The operation of each part of the first paper discharge device 30, the second paper discharge device 40, and the post-processing device 50 is controlled. The program in the control CPU 113 includes the program of the present invention. The program may be stored in a movable storage unit and distributed.
The control CPU 113 constitutes the control unit 100 of the present invention together with a program memory (ROM) 114, a system memory (RAM) 116, a non-volatile memory 115, etc., and executes a job, determines a sheet defect based on a read result, and determines a discharge destination. Switching, output control of a mark sheet, stop of a job, and the like can be controlled.
The control CPU 113 may control each unit based on the output setting or operation designation of the job input through the operation unit 140 or the external operation unit of the external device 4.

The scanner unit 130 includes a CCD 131 that performs optical reading, and a scanner control unit 132 that controls the entire scanner unit 130. The scanner control unit 132 is connected to the control CPU 113 so as to be able to perform serial communication. Further, the CCD 131 is connected to the reading processing unit 117, and the reading processing unit 117 is connected to the DRAM control IC 111 in a controllable manner.
The reading processing unit 117 processes image data read by the CCD 131. The reading processing unit 117 performs various processing such as analog signal processing, A / D (Analog to Digital) conversion processing, and shading processing on the analog image signal input from the CCD 131, generates digital image data, and generates digital image data. Output to the extension IC 125.
An ADF control unit 135 is controllably connected to the control CPU 113, and the ADF control unit 135 controls the automatic type document feeder (ADF) 14.
The scanner unit 130 reads an image of a document placed on the upper platen glass of the apparatus main body 10 or a document automatically conveyed by the automatic type document feeder (ADF) 14.

  The operation unit 140 includes an LCD 141 having a touch panel, and an operation unit control unit 142 that controls the entire operation unit, and functions as an operation unit and a display unit. The operation unit control unit 142 is connected to the control CPU 113 so as to be able to perform serial communication.

  In the operation unit 140, based on the control by the control CPU 113, through the LCD 141, input machine settings such as output condition settings and operation control conditions of the apparatus main body 10, input settings of paper information (size, paper type) of each paper feed tray, Post-processing settings, continuous output mode after spalling detection, stop mode after spoiling detection, display of detected spoiling information, and the like can be performed.

A compression / expansion IC 125 capable of compressing or expanding image data is connected to the DRAM control IC 111. The DRAM control IC 111 controls the compression / decompression of the image data by the compression / decompression IC 125 and the input / output control of the image data to / from the image memory (DRAM) 120 in accordance with an instruction from the control CPU 113. .
Further, a write processing unit 126 is connected to the DRAM IC 111. The write processing unit 126 is connected to the image forming unit 11 including the LD 151a of the printer unit 150, and generates write data used for the operation of the LD 151a based on the image data.

  The printer unit 150 includes a printer control unit 152. The printer control unit 152 is connected to the control CPU 113 so as to be able to perform serial communication. The printer control unit 152 operates in accordance with a control command from the control CPU 113 to control the entire printer unit 150 (paper feeding, image formation, paper conveyance, switching of paper discharge destination, post-processing, and the like), and perform paper conveyance and image formation. And so on. Further, the printer control unit 152 can instruct the compression / decompression IC 125 to decompress the compressed image data.

  Further, the FNS control unit 500 of the post-processing device 50 is connected to the printer control unit 152 in a controllable manner. The printer control unit 152 can issue a post-processing instruction to the FNS control unit 500 based on a command from the control CPU 113, and can acquire status information in the post-processing device 50 from the FNS control unit 500. The FNS control unit 500 can control the entire post-processing device 50, and switches the transport path in the post-processing device and controls post-processing in the post-processing unit 54. The FNS control unit 500 can be configured by a CPU, a program for operating the CPU, and the like.

  Further, a DRAM control IC 161 of the print controller 160 is connected to the PCI bus 112. When the apparatus main body 10 is used as a network printer or a network scanner, the print controller 160 receives image data or the like from the external device 4 connected to the network 3 or the like, or receives an image acquired by the scanner unit 130. The data is transmitted to an external device 4 connected to the network 3 or the like.

  In the print controller 160, an image memory 162 composed of a DRAM or the like is connected to a DRAM control IC 161. In the print controller 160, a DRAM control IC 161, a controller control CPU 163 for controlling the entire print controller 160, and a LAN interface 165 are connected to a common bus. The LAN interface 165 is connected to the network 3.

  Further, an IO 128 is connected to the control CPU 113. The IO 128 enables signals with various sensors inside and outside the image forming apparatus 1 and the like, for example, transmission of control signals to the image reading units 24 and 25, acquisition of image reading results from the image reading units 24 and 25, It is possible to acquire the results of the full load detection of the first large-volume stacker tray 31 of the first paper discharge device 30 and the full-load detection of the second large-volume stacker tray 41 of the second paper discharge device 40.

The external device 4 connected to the image forming apparatus 1 includes an external control unit 40 that controls the entire external device 4, an operation screen 410, and an external operation unit 420. The external control unit 400 has a CPU and a program operating on the CPU. The external device 4 may control the image forming apparatus 1. In this case, the external control unit 400 functions as a control unit of the present invention, and the hardware in the external control unit 400 is a program of the present invention. It corresponds to the computer to be executed.
Further, the operation screen 410 and the external operation unit 420 may be configured such that the operation unit and the display unit are integrally formed by an LCD with a touch panel or the like.

Next, a basic operation of the image forming apparatus 1 will be described.
First, a procedure for storing image data in the image forming apparatus 1 will be described.
First, a case where the image is read by the scanner unit 130 and image data is generated in the image forming apparatus 1 will be described. First, an image is optically read from a document by the CCD 131 in the scanner unit 130. At this time, the control CPU 113 issues a command to the scanner unit control unit 132, and the scanner unit control unit 132 controls the operation of the CCD 131. The reading of the document may be performed while the document is being fed by the automatic type document feeder (ADF) 14 or the document may be placed on the platen glass. The control CPU 113 is operated by a program, and issues a command to the scanner unit 130 based on an operation of the operation unit 140.

  The image read by the CCD 131 is subjected to data processing by the reading processing unit 117, and the image data subjected to the data processing is sent to the compression / expansion IC 125 via the DRAM control IC 111 and is compressed by a predetermined method. The compressed data is stored in the compression memory 121 via the DRAM control IC 111. When the data is stored in the HDD 123, the data once stored in the compression memory 121 is sent to the HDD 123 via the DRAM control IC 111.

  In addition, image data can be input to the image forming apparatus 1 via the network 3. Examples of the image data include data generated by an application program or the like of the external device 4 and data generated by another image forming apparatus. The data is received by the print controller 160 via the network 3 and the LAN interface 165, and is temporarily stored in the image memory 162 by the DRAM control IC 161. The data stored in the image memory 162 is transferred to the DRAM control IC 111 via the PCI bus 112 and is temporarily stored in the decompression memory 122. The data stored in the decompression memory 122 is sent to the compression / decompression IC 125 via the DRAM control IC 111, subjected to compression processing, and stored in the compression memory 121 via the DRAM control IC 111. When the data is stored in the HDD 123, the data once stored in the compression memory 121 is sent to the HDD 123 via the DRAM control IC 111.

  Next, when an image is output by the image forming apparatus 1, the data stored in the HDD 123 is temporarily stored in the compression memory 121 via the DRAM control IC 111. The data stored in the compression memory 121 is sent to the compression / expansion IC 125 via the DRAM control IC 111 to expand the data. The decompressed data is sent to the write processing unit 126 via the DRAM control IC 111 to generate write data, and the LD unit 151a writes the photoconductor.

  In the printer unit 150, each unit such as the main body paper supply unit 12, the paper supply device 60, and the transport path 13 is controlled by the printer control unit 152 that has received a command from the image control CPU 111. In the printer unit 150, image formation, transfer to paper, fixing, conveyance to the post-processing device 50 by a conveyance path, post-processing in the post-processing device 50, and the like are sequentially performed, and printout is performed. FIG. 1 shows that the sheets P0 to P3 are sequentially conveyed, and printing and conveyance in the image forming unit 11 are performed.

  Further, in the apparatus main body 10, the image reading result read by the image reading unit 24 and / or the image reading unit 25 of the image reading device 20 can be obtained by the control CPU 113 through the IO 128. In addition, it is possible to determine the defect of the conveyed sheet. Note that the image reading device 20 may be referred to as an Image Calibration Control Unit (ICCU), and the terms of the ICCU will be appropriately used below. Note that the image reading device is not limited to the ICCU.

Next, a process when a defect is detected during image reading will be described.
In an image forming system provided with an image reading device, usually, after detecting a defect based on a reading result read by the image reading device 20, a pre-purge of fed paper present in the apparatus is performed, and further information on the detected sheet is detected. Then, a sheet of a mark on which (e.g., five sheets before the sheet are detected) is output. Thereafter, the image forming operation based on the job output is continued. Note that it is desirable to use, as a mark sheet, a sheet having a sheet type, a size, a color, a direction of a transfer medium at the time of sheet ejection, and the like different from those used in a normal job.
The continuous output control after spalling detection is a recovery output immediately compared to the control that stops the machine after all of the fed paper in the machine has been ejected and displays information on the operation unit (this is called “stop after spoiling detection” control). , The machine idle time can be reduced.

FIG. 3 is a flowchart showing a procedure for executing the continuous output control after the detection of the spalling or the stop control after the detection of the spalling. The following procedure is executed by the control unit.
By starting the operation for printing, it is determined whether a next job exists (step s1). If there is no next job (step s1, No), the procedure ends.
If a next job exists (step s1, Yes), it is determined whether a next page exists (step s2). If the next page does not exist in step s2 (step s2, No), the process returns to step s1 and waits until the next job exists.
If the next page exists in step s2 (step s2, Yes), printing is performed (step s3), and an image is read by an ICCU (image reading device) (step s4). Thereafter, the control unit determines whether or not a yaw has been detected based on the obtained reading result (step s5).
If a scuff is detected in step s5 (step s5, Yes), the supply of new paper is stopped, the paper is continued to be conveyed, and it is determined whether the discharge of all sheets in the apparatus has been completed (step s6). . If the discharge of all sheets is not completed (step s6, No), the process returns to step s6 and waits until the discharge of all sheets is completed.

If the discharge of all sheets has been completed (step s6, Yes), it is determined whether or not stop control has been set after the detection of the crack (step s7). Note that an operator (for example, a user) may be able to select whether to execute the above-described stop control after spalling detection or the continuous output control after spoiling detection.
If the stop is set after the detection of the crack (step s7, Yes), the machine is stopped (step s8), and the number of sheets to be removed from the discharge destination (the number of sheets to be removed) is displayed on a display unit or the like (step s7). s9), it is determined whether there is an operation input of completion of removal (step s10). Here, it is assumed that, when the removal of the paper is completed, the user or the like performs an operation input using the operation unit or the like.

If there is no input of completion of removal (No in step s10), the process waits until the removal is completed. If the removal completion has been input (step s10, Yes), the process proceeds to step s12 to perform the print continuation processing of the job.
In step s7, if the stop control is not set after the failure detection (step s7, No), the marker paper is output and discharged (step s11), and the process proceeds to step s12 to perform the continuous printing output of the job. In addition. Information about the scrap is printed on the mark paper.
In step s12, a print page rewinding process is performed (step s12). In the rewinding process, the printing start page is rewound and the output of the job is restarted so as to print the defective page again. When the output of the page is completed, the process proceeds to step s2 to determine whether the next page exists.
With the continuous output after the failure detection, the output can be continued without stopping the machine, so that downtime can be reduced.

  However, when there are a plurality of paper discharge destinations of the fed paper in the machine at the time of the pre-purge, in the continuous output control after the detection of the waste, the user may fail to remove the waste paper without noticing the paper serving as the mark. In particular, when the discharge destination is changed due to a tray full (full load detection) or the like, in the above-described post-scratch detection control, the discharge destination of the mark paper and the discharge destination of the splinter paper differ.

Therefore, in the present invention, even if the continuous output is set after the detection of the failure, if the conveyed sheet is determined to be defective and the discharge destination is switched during the discharge of the sheet, the predetermined output is performed before the continuous output is performed. Operation is performed.
As one of the predetermined operations, the output operation is temporarily stopped, and a sheet serving as a mark is discharged to all the discharge destinations at which the discharge destination is switched.
Further, along with the above operation, it is possible to notify each discharge destination of the processing content. The notification is performed via the display unit, printed on paper, or transmitted through a network or the like. The notification information includes, for example, how many sheets need to be removed from each tray on which paper has been ejected, how many sheets need to be removed from the last output sheet, and the like. This notification makes it easier to find the waste paper.

(Embodiment 1)
FIG. 4 is a flowchart showing a procedure for stopping the output when there is a switch (switching) of the paper discharge destination after the detection of the tear. The following procedure is executed under the control of the control unit.
When the operation for printing is started, it is determined whether a next job exists (step s21).
If the next job exists (step s21, Yes), the process proceeds to step s22. If the next job does not exist (step s21, No), the procedure ends.
If the next job exists in step s21, it is determined whether the next page exists (step s22). If the next page exists (step s22, Yes), the process proceeds to step 23 to execute printing. If the next page does not exist (step s22, No), the process proceeds to step s21 to determine whether the next job exists. judge.
After printing is performed in step s23, paper is read by an ICCU (image reading device) (step s24). The read result is sent to the apparatus main body, and the control unit determines whether there is a defect (whether it is defective) (step s25).

If a scuff is detected in the determination (step s25, Yes), it is determined whether or not the discharge of all sheets has been completed (step s26). If no scuff is detected (step s25, No), step s22 is performed. Then, it is determined whether there is a next page.
In step s26, the supply of the new sheet is stopped, the sheet is pre-purged, and it is determined whether the discharge of all sheets in the apparatus is completed. If the discharge of all sheets is completed (Yes in step s26), the process proceeds to step s27, and it is determined whether or not the stop setting is performed after the detection of the scuffing. If the discharge of all sheets is not completed (step s26). , No), and waits until the discharge of all sheets is completed.

In step s27, it is possible to determine whether or not the stop after the error detection is set based on the machine settings applied to all jobs, the settings for the unique jobs, and the like. It should be noted that it is also possible to make it possible to explicitly select and set either the stop control after spalling detection or the continuous output control after spalling detection.
When the stop is set after the detection of the failure (step s27, Yes), the process proceeds to step s28, and the machine is stopped. If the stop setting has not been made after the detection of the spall (step s27, No), the process proceeds to step s31, and it is determined whether or not there is a tray switch after the detection of the spall.
In the machine stop in step s28, the conveyance of the paper is stopped, and the number of papers to be removed from the paper discharge destination (the number of papers to be removed) is transmitted to a display unit or a terminal and displayed (step s29). At this time, an operable display is provided on an operation unit or the like so that an operator (such as a user; hereinafter, referred to as a user) can give a restart instruction.

  It is determined whether or not there is a restart instruction from the user (step s30). If there is no restart instruction from the user (step s30, No), the process waits until there is a restart instruction. If the user has instructed to resume (step s30, Yes), the process proceeds to step s33 to perform a print page rewind process (step s33), and returns to step s22 to determine whether there is a next job. In the print page rewinding process, the output of the job is restarted by rewinding the page order so as to return to the page having the defect.

  In step s27, if the stop setting has not been made after the detection of the spalling (step s27, No), it is determined whether or not there is a switch of the discharge tray after the detection of the spalling (step s31). The switch of the paper discharge tray is performed by switching when the paper discharge tray is full, switching setting in a job, or the like. In the present invention, the reason for switching the paper discharge destination is not particularly limited.

If there is a discharge tray switch after the detection of the failure (step s31, Yes), the process proceeds to step s28, the machine is stopped, and the number of sheets to be removed from the discharge destination (the number of sheets to be removed) is displayed on a display unit or the like. (Step s29). Next, it is determined whether or not there is a restart instruction from the user (step s30), and if there is no restart instruction from the user (step s30, No), the system waits for the restart instruction. When a restart instruction is given by the user (step s30, Yes), the process proceeds to step s33 to perform a print page rewind process, and then proceeds to step s22 to determine whether a next page exists.
If there is no paper ejection tray switch after the detection of the scuff (step s31, No), the mark paper is output (step s32), the process of rewinding the print page to the scuff detection page is performed (step s33), and the process proceeds to step s22. To determine whether the next page exists.
In step s32, the display on the display unit or the transmission to the external device may be performed as a notification without outputting the mark paper, and these may be performed together with the output of the mark paper.

(Embodiment 2)
In the first embodiment, the output of the job is stopped when the discharge destination is switched after the detection of the spalling. However, the output of the job is not stopped as a predetermined operation. The mark paper may be output to the paper discharge tray of (1). As a result, even if the tray is switched and the waste paper is discharged to a plurality of paper output trays after the detection of the paper waste, the mark paper is discharged to each of the paper discharge trays including the paper waste. It is possible to prevent the waste paper from being missed.
In this case, as the mark paper, paper having different paper types and sizes can be used, but the information of the scrap in each of the paper discharge trays may be printed on the mark paper so that the user can easily find the scrap. For example, by printing how many sheets need to be removed for each tray where the paper has been ejected, the user can easily remove the scrap by referring to the mark paper, and the Contamination can be prevented.

As a predetermined operation, a procedure including a process of discharging the mark paper to the switched paper discharge tray will be described with reference to the flowchart of FIG. The following procedure is executed under the control of the control unit.
When the printing operation is started, it is determined whether a next job exists (step s41). If the next job exists (step s41, Yes), the process proceeds to step s42 to determine whether the next job exists. If the next job does not exist (step s41, No), the procedure ends.

In step s42, it is determined whether the next page exists. If it is determined that the next page exists (step s42, Yes), the process proceeds to step 43 to perform printing. If the next page does not exist (step s42, No), the process returns to step s41 to determine whether the next job exists.
If the next page exists in step s42 (step s42, Yes), printing is performed (step s43), the paper is read by an ICCU (image reading device) (step s44), and the obtained read result is determined to be defective. I do. The determination of the burn may be performed by the control unit in the image reading unit, or may be performed by the control unit of the apparatus main body 10. If a scuff is detected (step s45, Yes), the process proceeds to step s46 to determine whether all sheets have been discharged. If no scuffing is detected (step s45, No), the process returns to step s42 to determine whether the next page exists.
In step s46, the supply of new sheets is stopped, and all sheets in the apparatus are pre-purged, and it is determined whether or not the discharge is completed (step s46). If the discharge of all sheets has been completed (step s46, Yes), the process proceeds to step s47, and it is determined whether or not the stop setting has been set after the detection of the scuffing. If the discharge of all sheets has not been completed (No in step s46), the process waits until the discharge of all sheets is completed.

In step s47, it is determined whether or not the stop is set after the detection of the crack (step s47). If the stop after the detection is set (step s47, Yes), the process proceeds to step s48 to stop the machine. If the stop setting has not been made after the detection of the failure (No in step s47), the process proceeds to step s51, and the mark paper is output. It should be noted that the display on the display unit or the transmission to the external device may be performed as a notification without outputting the mark paper, and these may be performed together with the output of the mark paper.
In step s48, the machine is stopped to stop the conveyance of the sheet, and then the number of sheets to be removed from the discharge destination (the number of sheets to be removed) is displayed on a display unit or the like (step s49). Thereafter, it is determined whether or not the user has issued a restart instruction (step s50). When there is an operation input of completion of removal, it may be determined that the user has given a restart instruction.
If there is no restart instruction from the user (step s50, No), the process waits until there is a restart instruction. If there is a restart instruction from the user (step s50, Yes), the process proceeds to step s53 to perform processing to rewind the print page to the scuff detection page (step s53), and returns to step s42 to determine whether the next page exists. Make a decision.

After the mark paper is output in step s51, it is determined whether or not the mark paper has been output to all of the paper discharge trays used after the detection of the tear (step s52). At this time, if the discharge destination is switched, all the switched discharge destinations are to be determined.
Therefore, when the discharge destination has already been switched by the switching, since the mark sheet has not been output to all the discharge trays (step s52, No), the process returns to step s51 and the mark sheet is also output to the discharge destination before switching. Is output. If there is no switching of the paper discharge destination, or if the flow returns to step s51 and discharges the mark paper again and the mark paper is output to all the paper discharge trays (step s52, Yes), the process proceeds to step s53 and prints. Perform page rewind processing. After step s53, the process returns to step s42 to determine whether the next page exists.
By the above-described operation, the mark sheet is discharged to all of the discharge trays on which the sheets have been discharged after the detection of the scuffing, so that it is difficult for the user to overlook the scuffing, and it is possible to prevent the scuffing of the output material.

(Embodiment 3)
In the first and second embodiments, when the paper is discharged to a plurality of paper discharge destinations after the detection of the failure, the output of the job is stopped or the mark paper is discharged to each of the used paper discharge trays. However, the user may be able to select which of these operations to perform.
The procedure of the third embodiment will be described below with reference to the flowchart of FIG. The following procedure is executed under the control of the control unit.
When the printing operation is started, it is determined whether a next job exists (step s61). If the next job exists (step s61, Yes), the process proceeds to step s62 to determine whether the next page exists. If the next job does not exist (step s61, No), the procedure ends.
If it is determined in step s62 that the next page exists (step s62, Yes), the process proceeds to step 63 to execute printing. If the next page does not exist (step s62, No), the process returns to step s61. To determine whether the next job exists.

In step s63, printing is performed based on the job (step s63), and an image is read from the discharged sheet by an ICCU (image reading device) (step s64). Scratch determination is performed based on the acquired reading result, and it is determined whether or not a scuff has been detected (step s65). When the scuffing is detected (step s65, Yes), the process proceeds to step s66 to determine whether all sheets have been discharged. If no error is detected (step s65, No), the process returns to step s62 to determine whether the next page exists.
In step s66, the supply of new sheets is stopped, and a pre-purge for discharging all the sheets in the apparatus is performed, and it is determined whether the discharge of all the sheets is completed (step s66). If the discharge of all the sheets has been completed (step s66, Yes), the process proceeds to step s67 to determine whether or not the stop setting has been set after the detection of the failure. If the discharge of all sheets has not been completed (step s66, No), the process waits until the discharge of all sheets is completed.

In step s67, it is determined whether or not the stop after the detection of the spalling is set, and if the stop after the detection of the spalling is set (step s67, Yes), the process proceeds to step s68 to stop the machine. If the stop setting has not been made after the detection of the spalling (step s67, No), the process proceeds to step s71, and it is determined whether or not there is a discharge tray switch after the detection of the spalling.
In step s68, the machine is stopped (step s68), the number of sheets to be removed from the discharge destination (the number of sheets to be removed) is displayed on a display unit or the like (step s69), and it is determined whether or not the user has issued a restart instruction (step s68). s70). When there is an operation input of completion of removal, it may be determined that there is a restart instruction from the user. If there is no restart instruction from the user (step s70, No), the process waits until there is a restart instruction. If there is a restart instruction from the user (step s70, Yes), the process proceeds to step s76 to perform a print page rewind process, and then returns to step s62 to determine whether there is a next page.

  In step s71, if the paper discharge tray switch is performed after the detection of the scuffing (step s71, Yes), the process proceeds to step s72, and it is determined whether the setting to stop when the tray is switched is selected. The setting can be set for each machine setting or each job. Further, whether to stop or not to stop may be determined by default. If it is set to stop at the time of the tray switch (step s72, Yes), the process proceeds to step s68 to stop the machine. If it is not set to stop at the time of the tray switch (step s72, No), a mark sheet is output (step s73), and it is determined whether or not the mark sheet has already been output to all the used discharge trays (step s73). s74). Note that the display on the display unit or the transmission to the external device may be performed as a notification without outputting the mark paper, and these may be performed together with the output of the mark paper.

If the mark paper has not been output to all the paper discharge trays used after the detection of the spall (step s74, No), the flow returns to step s73 to output the mark paper to another paper discharge tray, and all the papers used after the detection of the spall. It is again determined whether or not the mark sheet has been output to the sheet discharge tray (step s74).
If the mark paper has already been output to all the paper discharge trays used after the detection of the scuff (step s74, Yes), the process proceeds to step s76, where the print page is rewound to the scuff detection page (step s76). Returning to s62, it is determined whether the next page exists.
If there is no paper ejection tray switch after the detection of the failure in step s71 (step s71, No), a mark sheet is output (step s75), and the process proceeds to step s76 to perform a print page rewinding process.
According to the above operation, the user can select an operation when the tray is switched after the detection of the defect, so that the operation according to the user's request can be performed.

  In any of the above embodiments, the case where the stacker tray (LS1) is switched from the stacker tray (LS2) to the case where the discharge to a plurality of paper discharge trays is performed after the detection of the scuffing is shown. However, the order is not particularly limited in the present invention, and the discharge destination is not limited to the stacker, and a case where a switch to another discharge tray may be performed. For example, the discharge destination of the sheet may be changed from the first discharge tray 51 of the post-processing device to the second discharge tray, and the discharge destination may be between LS1, LS2 and the discharge tray. There may be a case where it can be switched.

  In the above embodiment, the notification to the user is displayed on the display unit. However, the notification method is not particularly limited as the present invention. For example, the external device 4 connected to the image forming apparatus 1 It may be performed by sending an e-mail or the like to the display unit of, or a terminal held by the user. In any case, the information to be notified is not particularly limited, and information indicating how many sheets need to be removed for each tray or information such as how many sheets need to be removed from the last output sheet may be notified. Alternatively, the notification content may be different for each notification destination.

  Further, in the third embodiment, when the tray is switched after the image is detected, it is possible to select whether to stop the job or to discharge the mark sheet to each used tray. Can be stored in the machine so as to be reflected on the job, or can be stored in the job setting so as to be reflected on a specific job.

Next, the processing procedure of the first embodiment described with reference to FIG. 4 will be described using the outline of the image forming apparatus in FIGS.
Here, the post-processing device and the sheet feeding device are omitted, and hereinafter, the first large-capacity stacker tray is represented as LS1, and the second large-capacity stacker tray is represented as LS2. Note that one of the trays of the main body paper feeding unit of the apparatus main body 10 stores paper S used for a job, and the other tray stores paper MS different in paper type and the like from the paper S.
A case in which the machine is started up and a large number of page jobs are executed with the discharge destination set to LS automatic setting will be described. Since the paper discharge destination is set to the LS automatic setting, when it is necessary to switch the paper discharge destination because the stacker tray becomes full or the like, the paper discharge destination is switched under the control of the control unit 100. For example, when a sensor or the like detects that the stacker tray is full, a detection result is transmitted to the control unit 100, and a switch is performed under the control of the control unit 100. Alternatively, when the paper discharge device detects that the paper is full, the paper discharge device may be configured to switch the paper discharge destination, and transmit to the control unit 100 that there is a switch. The switching of the paper discharge destination may be performed according to the output conditions of the job.

  When a job is started, sheets are sequentially fed from a tray in which the sheets S are stored, an image is formed in the apparatus main body 10, and the sheets S 0, S 1,... Are transferred to the first sheet discharging device 30 via the image reading device 20. The sheets are sent and sequentially loaded in the LS1 (FIGS. 7A and 7B). At the time of job output, if it is determined that there is a defect in the sheet S2 based on the reading result of the image reading device 20 (ICCU), the subsequent sheet feeding is stopped (FIG. 7 (3)). At this time, since the next sheet S3 has already been fed and is in a transporting state, the sheets S2 and S3, which are all sheets remaining in the apparatus, are discharged to the LS1 by prepurge.

  In the operation of FIG. 7 (3), it is determined whether or not the tray has been switched after the scuff detection. In this example, since there is no switch for the tray after the detection of the scrap, the mark sheet MS1 is output from the sheet MS stored in the upper sheet feeding unit, and then the main body is set so that the page which was the scrap is re-output. Printing is performed by a rewinding process from the page of S2 as a recovery page (FIG. 8D). Note that the sheet MS is different from the job sheet S in at least one of the sheet type, size, shape, and color, and can be used as a mark sheet. At this time, the mark paper may be fed from the paper feed unit 60, and the mark paper can be searched for and fed.

It is assumed that, when the printing of the job is continued, a defect is detected from the result of reading by the ICCU on the paper SN serving as a predetermined page. Therefore, the paper feed is stopped. At this time, sheets SN + 1 and SN + 2 have already been fed as subsequent sheets, and sheets SN, SN + 1, and SN + 2 are pre-purged (FIG. 8 (5)).
However, after the detection of the failure, the tray switch is present and the sheets SN and SN + 1 are discharged to LS1, but the sheet SN + 2 is discharged to LS2 until the pre-purge is completed (FIG. 8 (6)). In this example, when the sheets SN and SN + 1 are discharged, the fullness sensor detects the fullness of the stacked sheets at LS1 and the control unit 100 performs the tray switch so that the discharge destination is LS2.

  In the state shown in FIG. 8 (6), the output of the job is temporarily stopped and a restart instruction from the user is awaited since the tray switch has been detected after the detection of the failure. At this time, information on how many sheets need to be removed from each tray is displayed on the LCD 131 of the operation unit 130 or the like, and a restart instruction from the user is waited.

  According to the operation of the first embodiment, when the paper discharge destination is switched after the detection of the waste, the job is stopped, so that the user can easily remove the waste paper, and it is possible to prevent the waste paper from being mixed into the output material. It can be effectively prevented.

In the above description, the tray switching is performed when the large-capacity stacker tray is full. However, the present invention does not limit the tray switching condition. May be switched according to the output conditions and post-processing conditions.
For example, the paper discharge destination may be different depending on the job that performs post-processing and the job that does not perform post-processing.

Next, a processing procedure according to the second embodiment described in FIG. 5 will be described with reference to the outline of the image forming apparatus in FIG.
The operations from the start of the output of the job to the detection of the failure (FIGS. 9 (1) to 9 (5)) are common to the operations of (1) to (5) in FIGS.

The machine is started up, and a large-volume page job is executed with the discharge destination set to LS automatic setting.
When the job is started, since it is determined that there is a defect in the paper, the subsequent paper feeding is stopped, and all the sheets remaining in the machine are discharged to LS1.
Since the tray has not been switched after the detection of the scuffing, the mark paper MS1 is output, and thereafter, the page that was the scuffing paper is output again.
When the printing of the job is continued, and the paper SN is detected from the reading result of the ICCU on the paper SN, the paper feeding is stopped. At this time, sheets SN + 1 and SN + 2 have already been fed as subsequent sheets, and sheets SN, SN + 1, and SN + 2 are pre-purged.

However, after the detection of the scuff, by the time the pre-purge is completed, there is a tray switch, and the sheets SN and SN + 1 have been discharged to LS1, but the sheet SN + 2 has been discharged to LS2 (FIG. 9 (6)). In this embodiment, MS2 and MS3 are discharged to LS1 and LS2, respectively, as mark sheets. For example, the sheet MS2 is discharged to LS1, and the sheet MS3 is discharged to LS2. Note that the sheet discharge order is not particularly limited, and the sheet MS2 may be discharged to LS2, and the sheet MS3 may be discharged to LS1.
The mark paper discharged to LS1 is printed to remove two sheets (paper SN and paper SN + 1), and the mark paper discharged to LS2 is printed to remove one sheet (paper SN + 2). . Further, the number of sheets to be removed by the total number of sheets may be printed on the last mark sheet MS3.
According to the above procedure, the user can easily remove the defective paper.
Although the tray full alarm is issued because LS1 is full, an alarm is set so that there is a margin, so that when the mark sheet is discharged, the tray full alarm is ignored and the sheet is discharged to LS1. Control of the paper discharge destination is performed.
After the output of the mark sheet, recovery output from the page (sheet SN) in which the defect is detected is performed, and the job is restarted.

  As described above, the present invention has been described based on the above embodiments. However, the present invention is not limited to the contents of the above embodiments, and appropriate changes can be made without departing from the scope of the present invention.

REFERENCE SIGNS LIST 1 image forming apparatus 3 network 4 external device 10 apparatus main body 11 image forming unit 12 paper feed tray 13 transport path 20 image reading device 24 image reading unit 25 image reading unit 30 first paper discharging device 31 first large capacity stacker tray 33 transport Path 40 Second paper discharge device 41 Second large-capacity stacker tray 43 Transport path 50 Post-processing device 51 First paper discharge tray 52 Second paper discharge tray 53 Transport path 54 Post-processing unit 100 Control unit 110 Control block 113 Control CPU
115 Non-volatile memory 140 Operation unit 400 External control unit

Claims (21)

An image forming unit for forming an image on a medium body based on the job,
A conveying unit that conveys the medium body,
A control unit that controls the image forming unit and the transport unit,
Wherein the control unit, the apparatus has the functions of the determination to defect determination whether to acquire an image reading result of the medium which is a picture of at least the medium body defective, it is determined that the image is defective by the defect determination In this case, after the determination of the failure, it is possible to perform a pre-purge for discharging the medium remaining in the apparatus ,
After determination of the defective, before the pre-purge completion, if there is switching of the discharge destination for discharging a medium body, relates to each of the discharge destination that is discharged after the determination of the defective, notifies the occurrence of the defective An image forming apparatus. An image forming unit that forms an image on a medium based on a job;
A transport unit that transports the medium,
A control unit that controls the image forming unit and the transport unit,
The control unit has a defect determination function of acquiring an image reading result of the medium and determining at least whether the image of the medium is defective, and when the image is determined to be defective by the defect determination. After the determination of the failure, it is possible to perform a pre-purge for discharging the medium remaining in the apparatus,
The control unit, after the determination of the failure, before the completion of the pre-purge, if there is no switching of a discharge destination for discharging the medium, after the completion of the pre-purge, executes a continuous printing at the time of failure to continue a job,
Although the defective during continued printing is selected, after the determination of the defective, before the pre-purge completion, if there is switching of the discharge destination for ejecting a medium, to stop the job after the pre-purge completion images forming device you characterized. Wherein, after stopping the job, the image forming apparatus according to claim 2, wherein the printing continues to perform the image formation based on the job receiving restart instruction of the operator. Wherein the control unit, the image forming apparatus according to claim 2 or 3, characterized in that after stopping the job, is et to the notification of the failure occurrence. Wherein, after the determination of the defective, before stopping the job is an image forming apparatus according to claim 4, wherein the does not notify the failure occurrence. An image forming unit that forms an image on a medium based on a job;
A transport unit that transports the medium,
A control unit that controls the image forming unit and the transport unit,
The control unit has a defect determination function of acquiring an image reading result of the medium and determining at least whether the image of the medium is defective, and when the image is determined to be defective by the defect determination. It is possible to perform continuous printing at the time of failure to continuously perform image formation based on a job,
After the determination of the failure, if there is a change of the discharge destination for discharging the medium before the continuous printing at the time of the failure, the occurrence of the failure occurs for each of the switched destinations before the continuous printing at the time of the failure. images forming apparatus you and performs the notification. The image forming apparatus according to claim 6 , wherein the control unit performs continuous printing at the time of failure after completion of the notification. Wherein, when performing in medium member serves as a mark notification of failure occurrence, relative to the sheet discharge before switching discharge destination, discharges the medium body serves as a mark or without discharge destination full detection The image forming apparatus according to claim 6, wherein: Wherein the control unit, the notification of the failure occurrence, the image forming apparatus according to any one of claims 1,4～8, which comprises carrying out the become medium body landmarks. The mark to become medium body includes a media body used in the job, the paper type, size, color, claim, characterized in that differ in one or more directions of the discharge time of the media body 9 The image forming apparatus as described in the above. Wherein the control unit, the notification to the image forming apparatus according to any one of claims 1,4～10, characterized in that indicating the number removal of media bodies in the discharge destination. Wherein, as the notification, according to any one of claims 4,6～8, characterized in that indicating the number remove the last output the media body before the defective Continuation printed as a reference Image forming apparatus. It has a display unit,
Wherein the control unit, the image forming apparatus according according to the notification to any one of claims 1,4～12, characterized by displaying in the display unit. 14. The image forming apparatus according to claim 1, wherein the control unit performs the notification via a network connected to the image forming apparatus. The image forming apparatus according to any one of claims 1 to 14 , wherein the control unit obtains switching information of a discharge destination transmitted from a discharge unit having a plurality of discharge destinations. Wherein the control unit, the image forming apparatus according to any one of claims 1 to 15, characterized in that for switching discharge destination by the control for the discharge unit having a plurality of discharge destinations. Wherein the control unit, the image forming apparatus according to any one of claims 2～8,12, characterized in that to start in response to an instruction of the operator of the defective Continuation printing. An image forming method for forming an image on a medium body based on the job,
A step of defect determination to determine whether the image of at least said medium acquires image reading result of the medium body is defective,
If the image is determined to be defective in the step of determining a defect, a step of performing a pre-purge for discharging the medium remaining in the apparatus after the determination of the defect ;
After determination of the defective, before the pre-purge completion, if there is switching of the discharge destination for discharging a medium body, relates to each of the discharge destination that is discharged after the determination of the defective, notifies the occurrence of the defective image forming method comprising: the Sources step, the. An image forming unit for forming an image on a medium body based on the job, a program executed by a computer for controlling the transport unit for transporting the medium body,
A step of defect determination to determine whether the image of at least the medium body acquires image reading result of the medium body is defective,
If the image is determined to be defective in the step of determining a defect, a step of performing a pre-purge for discharging the medium remaining in the apparatus after the determination of the defect ;
After determination of the defective, before the pre-purge completion, if there is switching of the discharge destination for discharging a medium body, relates to each of the discharge destination that is discharged after the determination of the defective, notifies the occurrence of the defective And a program for causing the computer to execute the steps. An image forming method for forming an image on a medium body based on the job,
A step of defect determination to determine whether the image of at least the medium body acquires image reading result of the medium body is defective,
If the image is determined to be defective in the step of determining a defect, a step of performing a pre-purge for discharging the medium remaining in the apparatus after the determination of the defect ;
After the completion of the pre-purge, if there is no change of the discharge destination for discharging the medium before the completion of the pre-purge, the failure-time continuous printing is performed after the completion of the pre-purge.
Step Although the defective during continued printing is selected, after the determination of the defective, before the pre-purge completion, be stopped when there is switching of the discharge destination for discharging a medium body, the job after the pre-purge completion And an image forming method. An image forming unit for forming an image on a medium body based on the job, a program executed by a computer for controlling the transport unit for transporting the medium body,
A step of defect determination to determine whether the image of at least the medium body acquires image reading result of the medium body is defective,
If the image is determined to be defective in the step of determining a defect, a step of performing a pre-purge for discharging the medium remaining in the apparatus after the determination of the defect ;
After the completion of the pre-purge, if there is no change of the discharge destination for discharging the medium before the completion of the pre-purge, the failure-time continuous printing is performed after the completion of the pre-purge.
Step Although the defective during continued printing is selected, after the determination of the defective, before the pre-purge completion, be stopped when there is switching of the discharge destination for discharging a medium body, the job after the pre-purge completion And a program for causing the computer to execute.

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