JP2007163755A - Image forming apparatus, document reader and copying machine provided with reader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase user-friendliness by improving the efficiency of work for reprocessing at the occurrence of jamming, and to effectively use resources such as recording material. <P>SOLUTION: An image forming apparatus performs display allowing a user to select a print restart page only when recording material is jammed in a paper ejection part ejecting the recording paper. In such a case, two selectable print restart pages n and n+1 are displayed. The print restart page n is an image page (page number n) corresponding to the jammed piece of recording paper in the paper ejection part and the print restart page n+1 is an image page (page number n+1) corresponding to the recording paper next to the jammed piece of recording paper in the paper ejection part. By following these displays, the user can select an arbitrary restart page by operating a prescribed operating means (an operation panel, etc.). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus, an original reading apparatus, and a copying machine including these, and more specifically, a copying machine, an facsimile, an MFP (multifunction peripheral), etc. (collectively named) having an image forming function and an original reading function. The present invention relates to an image forming apparatus and a document reading apparatus applied to a copying machine, and a copying machine including the apparatus.

2. Description of the Related Art A copying machine having a copying function, such as a copying machine, a facsimile machine, or an MFP (multifunction machine), is provided with an image forming apparatus for forming an image and an original reading apparatus for reading an original image. In such an image forming apparatus or a document reading apparatus, a recording sheet for reading a document or a recording sheet for forming an image may cause a jam in a conveyance path.
When such a jam has occurred and document reading or image formation is resumed, conventionally, the apparatus automatically determines a restart page for resuming document reading or image forming processing from the jam occurrence location. For example, if a paper discharge sensor is provided near the paper discharge roller of the paper discharge tray that discharges the recording paper, and a jam occurs when the recording paper is discharged, the recording paper passes completely through the paper discharge sensor. If not, image formation or image reading is resumed from that page. In such a conventional configuration, the user usually cannot select a resume page after a jam has occurred.

  For example, Japanese Patent Application Laid-Open No. H10-228867 discloses a printing apparatus that can avoid wasteful printing at the time of reprinting and eliminate waste as much as possible. It is disclosed. In this printing apparatus, a recording paper is continuously conveyed along a conveyance path from a predetermined paper feed start position to a paper discharge completion position, and is required for the recording paper at a transfer portion and a fixing portion provided in the middle of the recording paper. The process is performed and printing is performed. A jam sensor is provided for detecting a conveyance error of the recording paper in each of a plurality of conveyance sections divided by dividing the conveyance path at a midpoint between the transfer unit and the fixing unit. The print control unit determines the conveyance page status of the recording paper in each conveyance section, and if a conveyance abnormality is detected in any one of the plurality of conveyance sections by the jam sensor, the conveyance abnormality is conveyed at that time. Printing is resumed with only the contents of the subsequent pages including the conveyance page of the recording paper existing in the section as the contents to be printed thereafter.

  Further, for example, Patent Document 2 discloses an image copying apparatus that can simplify document reset when a jam occurs due to use of a document feeder, shorten the return processing time, and improve operability after the return processing. The image copying apparatus of Patent Document 2 stores document information at the time of jam occurrence and setting information at the time of copying in a non-volatile memory, performs a blank scan to skip to a copied document at the time of resetting, and when copying after jam processing The setting is made. As a result, the copying operation can be resumed quickly and easily even when a jam occurs.

Further, Patent Document 3 discloses an image reading apparatus that can easily ensure continuity of pages during jam recovery. Here, when reading of a document is resumed after a jam occurs in the automatic document feeder, the image of one document after the resumption of reading is stored in the re-read storage area. The duplication prevention means compares the front page and the back page of the first document after resuming the reading with the image of the last page read normally before the occurrence of the jam, and if there is a page with a matching image, The image corresponding to the page is deleted from the re-read storage area to prevent page duplication.
JP 2004-203550 A JP 2004-80548 A JP 2005-57405 A

  For example, in the image forming apparatus, when a jam occurs in the middle of paper discharge in the paper discharge roller on the most downstream side of the transport path to the paper discharge tray among the paper discharge units that discharge the recording paper, the user In some cases, the recording paper in the middle of paper discharge is pulled out as it is, and is judged to be an effective recording paper and placed on the paper discharge tray. For example, if the recording image of the recording paper that stops in the middle of the paper discharge roller is normal and the recording paper is not torn or broken, the user regards the recording paper as normal and places it on the paper discharge tray. .

  In such a case, in the conventional apparatus, when image formation or image reading is resumed after a jam, processing is resumed from an image corresponding to the recording paper stopped in the middle of the paper discharge roller as described above. Therefore, an overlapping process occurs with the recording paper that has stopped in the middle of the paper discharge roller even though the image formation / image reading is normally executed, which is irrational.

In the image reading apparatus, when a jam occurs in the paper discharge unit, it is not necessary to read the original again if all the original reading processes are completed. Request to clear the read original data and set the original again.
Setting the original again in this way is unreasonable because it takes extra reading time. Also, if the original is bent due to a jam, or if the original original is in a bad condition, the original cannot be read correctly even if it is re-read. There was a need to do.

  With respect to such a problem, the above Patent Documents 1 to 3 do not describe any effective restart process when the user uses the jammed recording paper as described above as normal. . In other words, no technical idea has been disclosed in which an area where a jam has occurred can be identified and a target page can be selected when restarting according to the area.

  The present invention has been made in view of the above circumstances, and when a jam occurs, the resume page can be selected by the user according to the occurrence location, thereby reducing the work efficiency at the time of reprocessing when a jam occurs. It is an object of the present invention to provide an image forming apparatus and an image reading apparatus which are improved, are highly convenient for the user, and can effectively use resources such as a recording material, and a copying machine including the apparatus. To do.

  In order to solve the above-described problem, a first technical unit includes a control unit that controls operation of an image forming apparatus in an image forming apparatus that continuously forms and outputs a plurality of pages of image data on a recording material. A jam detecting means for detecting a jam in the conveyance path of the recording material, and an operation input means for accepting a user operation. The control means detects the jam by the jam detecting means during the image forming operation, and performs jam processing. When the image forming operation returns, the image forming operation is restarted from the page selected by the operation by the operation input unit.

  According to a second technical means, in the first technical means, the control means restarts the image forming operation only when the jam occurrence location detected by the jam detection means is a predetermined specific occurrence location. This is characterized in that pages can be selected.

  According to a third technical means, in the second technical means, the specific occurrence location is an installation position of a jam detection means provided in the vicinity of a paper discharge roller for discharging the recording material from the image forming apparatus. It is a thing.

  The fourth technical means is characterized in that, in the first technical means, the control means extracts selectable page options from image data of all pages on which an image is formed.

  According to a fifth technical means, in the first technical means, the control means can select a page for resuming the image forming operation only when the step of the image forming operation is a predetermined specific operation. It is characterized by that.

  According to a sixth technical means, in the fifth technical means, when a specific operation is performed, when a single-sided image is formed on only one side of the recording material, or when the image is sequentially formed on the front and back surfaces of the recording material. This is characterized in that it is during image formation.

  According to a seventh technical means, in the original reading apparatus that automatically conveys the recording paper on which the original image is formed and reads the image data of the original image, the original reading apparatus controls the operation of the original reading apparatus. A jam detecting means for detecting a jam in the conveyance path of the recording material and an operation input means for accepting a user operation. The control means detects the jam by the jam detecting means during the document reading operation, and performs jam processing. When the original reading operation returns, the original reading operation is restarted from the page selected by the operation by the operation input means.

  According to an eighth technical means, in the seventh technical means, the control means restarts the document reading operation only when the jam occurrence point detected by the jam detection means is a predetermined specific occurrence point. This is characterized in that pages can be selected.

  According to a ninth technical means, in the eighth technical means, the specific occurrence location is an installation position of a jam detecting means provided in the vicinity of a paper discharge roller for discharging the recording material from the original reading device. It is a feature.

  According to a tenth technical means, in the ninth technical means, the control means can select a page read last before a jam occurs as a page for restarting the document reading operation. is there.

  According to an eleventh technical means, in the seventh technical means, the control means can select a page for resuming the original reading operation only when the step of the original reading operation is a predetermined specific operation. It is characterized by that.

  According to a twelfth technical means, in the eleventh technical means, the back side image reading when the specific operation is performed is a single-sided image reading in which only one side of the recording material is read or the front and back sides of the recording material are sequentially read. It is characterized by time.

  A thirteenth technical means is a copying machine provided with the image forming apparatus according to any one of the first to sixth technical means.

  A fourteenth technical means is a copier provided with the original reading device in any one of the seventh to twelfth technical means.

  A fifteenth technical means is a copying machine including the image forming apparatus according to any one of the first to sixth technical means and the original reading device according to any one of the seventh to twelfth technical means.

  According to the present invention, in an image forming apparatus such as a copying machine, a facsimile machine, or an MFP (multifunction machine) or a document reading apparatus, when a jam occurs, a resume page can be selected by the user according to the occurrence location. An image forming apparatus and an image reading apparatus that improve work efficiency during reprocessing when a jam occurs, are highly convenient for the user, and can effectively use resources such as a recording material, and the apparatus Can be provided.

  In particular, according to the present invention, a resume page is selectably displayed before returning after jam processing, a user's selection input is accepted, and an image forming operation or an image reading operation is resumed based on the user's selection input. Upon return after occurrence, the user can easily select the resume page based on the display.

  In addition, by displaying an image that allows the user to select the resume page only when a jam is detected by the jam detection unit provided in the paper discharge unit, the user can resume from the page where the paper discharge unit has been omitted, It is easy to select whether to resume from a non-restarting page.

  Also, by displaying an image that can select the resume page only in the single-sided image formation mode or the reverse side processing in the double-sided image formation mode, or in the single-sided original reading mode or the reverse side processing in the double-sided original reading mode, the location where the jam has occurred is displayed. Even if they are the same, when the mode is different, the selection screen corresponding to the mode can be optimally displayed.

  In addition, by displaying the page read last before the jam occurs in the document reading device, the user can determine whether all the documents have been read normally or whether the reading has not been completed. Based on the determination result, it is possible to select whether to re-read the document that has not passed through the paper discharge unit or to re-read from the next page.

  Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiments, and the repetitive description thereof is omitted.

  FIG. 1 is a diagram for explaining a configuration example of an embodiment of an image forming apparatus according to the present invention. In the image forming apparatus 100, each process unit responsible for each function of the image forming process is disposed around the photosensitive drum 3, and an image forming unit is configured by these. Around the photosensitive drum 3, an optical scanning unit 1, a developing unit 2, a cleaning unit 4, a charging unit 5, a charge eliminating lamp 7 and the like are arranged.

  The optical scanning unit 1 scans the optical image on the uniformly charged photosensitive drum 3 and writes an electrostatic latent image. The charging unit 5 uniformly charges the surface of the photosensitive drum 3. Further, the developing unit 2 visualizes the electrostatic latent image written by the optical scanning unit 1 with the developer supplied from the developer supply container 13. The transfer unit 6 transfers the image visualized on the photosensitive drum 3 onto the recording paper. Further, the cleaning unit 4 can remove the developer remaining on the photosensitive drum 3 and record a new image on the photosensitive drum 3. The static elimination lamp 7 removes electric charges on the surface of the photosensitive drum 3.

  A supply tray 10 is provided in the lower part of the main body of the image forming apparatus 100. The supply tray 10 is a recording paper storage tray that stores sheet-shaped recording paper. The recording paper stored in the supply tray 10 is separated one by one by the pickup roller 16 and conveyed to the registration roller 17. Then, the timing with the image formed on the photosensitive drum 3 is measured by the registration roller 17 and sequentially supplied between the transfer unit 6 and the photosensitive drum 3. Here, the image recorded and reproduced on the photosensitive drum 3 is transferred onto the recording paper. By pulling out the supply tray 10 to the front side (operation side) of the image forming apparatus 100, the recording paper can be replenished to the supply tray 10.

  Below the image forming apparatus 100 is for receiving recording sheets sent from peripheral devices (such as a recording sheet supply apparatus described later) of the image forming apparatus 100 and sequentially supplying the recording sheets toward the image forming unit. A recording paper receiving port 14 and an extended recording paper receiving unit 15 are provided.

  A fixing device 8 is disposed on the upper part of the image forming apparatus 100. The fixing device 8 sequentially receives the recording paper onto which the image has been transferred, and fixes the developed image on the recording paper using heat and pressure by the fixing roller 8a and the pressure roller 8b. Thereby, an image is recorded on the recording paper.

  The recording sheet on which the image is recorded is further conveyed upward by the conveyance roller 18 and passes through the switching gate 9. Here, when the stacking tray 20 provided in the exterior of the image forming apparatus 100 is set as a discharge tray, the recording paper that has passed through the switching gate 9 is discharged onto the stacking tray 20 by the operation of the reverse roller 19. The

  On the other hand, when it is designated to perform double-sided image formation processing or other post-processing, the recording paper that has passed through the switching gate 9 is once discharged toward the stacking tray 20 by the reverse roller 19. In this case, the reversing roller 19 is rotated in the reverse direction while holding the recording paper without completely discharging the recording paper. Then, the recording paper is reversed and conveyed in the reverse direction, that is, in the direction of the recording paper refeeding and conveying apparatus 200 and the post-processing apparatus that are selectively mounted for double-sided image forming processing and other post-processing.

  At this time, the switching gate 9 is switched from the solid line state in FIG. 10 to the broken line state. When performing the double-sided image forming process, the recording paper that has been reversely conveyed passes through the recording paper refeeding and conveying apparatus 200 and is supplied again to the image forming apparatus 100. When post-processing is performed, the conveyance path is switched by another switching gate from the recording paper re-feeding / conveying device 200, and the post-processing device (not shown here) is connected via the relay conveying device. It is designed to be transported. An example of the configuration of the recording paper refeeding and conveying apparatus 200, the relay conveying apparatus, the post-processing apparatus, and the like will be described with reference to FIG.

  Further, in the upper and lower space portions of the optical scanning unit 1, a control unit 12 that accommodates a circuit board that controls the image forming process and an interface board that receives image data from an external device, the various interface boards, and the images. A power supply device 11 for supplying power to the forming process unit is disposed.

  The recording paper refeeding and conveying apparatus 200 is attached to the left side surface (as viewed from the operation side) of the image forming apparatus 100. The recording paper re-feeding / conveying device 200 reverses and conveys the recording paper discharged from the fixing device 8 of the image forming apparatus 100 using the reverse roller 19 on the upper side of the image forming apparatus 100 to reverse the front and back of the recording paper. This is a recording paper transport path unit for supplying again between the photosensitive drum 3 of the image forming unit of the image forming apparatus 100 and the transfer unit 6 (transfer unit).

  A portion for supplying the recording paper including the supply tray 10 is a paper feeding unit 101. Further, in the copying machine described later, when other recording paper supply devices are attached, those paper feeding mechanisms also correspond to the paper feeding unit 101. A jam detection sensor 106 is provided on the recording paper conveyance path of the paper supply unit 101 as jam detection means for detecting a jam of the recording paper.

The mechanism including the image forming unit in the image forming apparatus 100 is a printing unit 102. A jam detection sensor 107 is provided on the recording paper conveyance path in the printing unit 102 as jam detection means for detecting a jam of the recording paper.
The paper discharge mechanism including the reverse roller 19 is referred to as a paper discharge unit 103. A jam detection sensor 108 is provided as a jam detection unit for detecting a jam of the recording paper on the recording paper conveyance path in the paper discharge unit 103.

A mechanism for receiving the discharged recording paper including the stacking tray 20 is a discharge tray unit 104. Further, in a copier described later, when a post-processing device is installed, the recording paper discharge portion also corresponds to the discharge tray portion 104.
A mechanism including the recording paper refeeding / conveying device 200 is a paper reversing unit 105.

FIG. 2 is a diagram for explaining a configuration example of a copying machine using the image forming apparatus 100 shown in FIG. 2 includes an image forming apparatus 100 that is an embodiment of an image forming apparatus according to the present invention, and an image reading apparatus 500 that is an embodiment of an image reading apparatus according to the present invention.
The copying machine records and outputs data read by the image reading apparatus 500 and data transferred from an external device (for example, an image processing apparatus such as a personal computer or a facsimile machine) connected to the copying machine as an image. is there.

<First recording paper supply device>
The first recording paper supply device 300 includes first to third recording paper supply units 31, 32, and 33 and a recording paper discharge unit 34. Recording paper is stored in the first to third recording paper supply units 31, 32 and 33.
Then, according to the user's selection of the recording paper, the first recording paper supply device 300 takes out the selected recording paper from the recording paper supply units 31, 32, 33, and supplies the selected recording paper one by one toward the recording paper discharge unit 34. . The first recording paper supply device 300 is also a unit having a desk function on which the image forming apparatus 100 is placed, and is detachable from the image forming apparatus 100.

The recording paper supplied by the first recording paper supply device 300 is delivered to the recording paper receiving port 14 provided in the lower part of the image forming apparatus 100 and then sent to the image forming unit of the image forming apparatus 100.
Further, by pulling out the recording paper supply units 31, 32, 33 to the front side of the main body of the first recording paper supply device 300, the recording paper is replenished or replaced with respect to the first to third recording paper supply units 31, 32, 33. be able to.

  Here, the first recording paper supply device 300 includes three recording paper supply units 31, 32, and 33. However, the first recording paper supply device 300 includes at least one or more recording paper supply units and a recording paper discharge unit. Can be configured.

<Second recording paper supply device>
The second recording paper supply device 400 includes a recording paper supply unit 41. Recording paper is stored in the recording paper supply unit 41. The second recording paper supply device 400 takes out the recording paper stored in the recording paper supply unit 41 by the recording paper supply operation, and goes to the recording paper discharge unit 42 provided at the upper right side of the second recording paper supply device 400. Supply one by one. The second recording paper supply device 400 can store a larger amount of recording paper than the recording paper stored in the first to third recording paper supply units 31, 32, 33 of the image forming apparatus 100.

  The recording paper supplied by the second recording paper supply device 400 is delivered to the extended recording paper receiving unit 15 provided at the lower left side of the image forming apparatus 100 and then to the image forming unit of the image forming apparatus 100. Sent.

<Relay transport device>
The relay conveyance device 700 is for conveying the recording paper to the post-processing device 800. The relay conveyance device 700 is attached to the image forming apparatus 100 via the recording paper refeeding conveyance device 200. A post-processing device 800 is mounted behind the relay transfer device 700 (left side as viewed from the operation side).
The relay conveyance device 700 includes a rotation fulcrum 71 provided in the post-processing apparatus 800 or a rotation fulcrum 71 provided in a connecting member (first positioning member) for connecting the image forming apparatus 100 and the post-processing apparatus 800. The relay transfer device 700 as a whole is supported so as to be rotatable.

<Post-processing device>
The post-processing apparatus 800 is disposed on the left side (viewed from the operation side) of the image forming apparatus 100 and includes a first recording paper discharge unit 81, a second recording paper discharge unit 82, and a receiving conveyance unit 83.
A receiving and conveying unit 83 provided on the upper side surface of the post-processing apparatus 800 receives the recording paper discharged from the image forming apparatus 100. Then, the first recording paper discharge unit 81 discharges the recording paper received by the receiving conveyance unit 83 as it is. The second recording paper discharge unit 82 discharges the recording paper that has been post-processed by post-processing means such as staples and punches that are selectively loaded.

In the post-processing device 800, the recording paper on which the image has been formed is discharged from the first recording paper discharge portion 81 or the second recording paper discharge portion 82 selected by the user.
Although not shown here, the post-processing apparatus 800 includes a post-processing apparatus having a function of performing a stapling process on a predetermined number of recording sheets, or a post-processing apparatus having a function of folding recording sheets such as B4 and A3. Alternatively, a post-processing apparatus having a function of making a filing hole, or a post-processing apparatus having a recording paper discharge unit of several to several tens of bins for sorting and sorting can be applied. Yes.

<Image reading device>
The image reading device 500 exposes and scans an image of a document set on a transparent document table (not shown), forms an image on a photoelectric conversion element, converts the document image into an electrical signal, and then converts the image into an electrical signal. Output as data. The image reading apparatus 500 simultaneously scans and reads a document image from below and above the document in the process of transporting the document along the automatic document transport path. The image reading apparatus 500 can be configured to simultaneously scan and read a document image from below and above the document in the process of conveying the document along the document transport path by the automatic document transport device.

A moving scanning optical system that scans and moves the lower surface of the document table is disposed below the document surface. The moving scanning optical system is configured to guide the optical image to the CCD, which is a photoelectric conversion element, and read the document image while stopped at a predetermined position on the document transport path. When both sides of the document are read simultaneously, the light source that exposes the document to the upper surface of the document surface, the optical lens that guides the optical image to the photoelectric conversion element, and the photoelectric conversion element that converts the optical image into image data are integrated. By mounting a close contact image sensor (CIS) configured on the automatic document feeder 600, both sides of the document are simultaneously read. A specific configuration example of the automatic document feeder 600 will be described in a second embodiment related to the present invention described below.
With the above configuration, when the duplex original reading mode is set, the originals (recording paper on which the original images are formed) set on the supply unit (original tray) of the automatic original conveying apparatus 600 are sequentially conveyed, and the original double-sided Are read almost simultaneously.

  The image reading apparatus 500 has an automatic reading mode and a manual reading mode. In the automatic reading mode, a sheet document is automatically supplied by the automatic document feeder 600, and is sequentially exposed and scanned one by one to read a document image. In the manual reading mode, a book document or a sheet document that cannot be automatically supplied by an automatic document feeder is set by a manual operation and a document image is read.

<Recording paper refeeding and conveying device>
The recording paper refeeding and conveying apparatus 200 is attached to the left side surface (as viewed from the operation side) of the image forming apparatus 100. The recording paper refeeding / conveying device 200 reversely conveys the recording paper on which the image has been discharged from the fixing device 8 of the image forming apparatus 100 using the reversing roller 19 on the upper side of the image forming apparatus 100, so that the recording paper This is a recording paper conveyance path unit for reversing the front and back and supplying the sheet again between the photosensitive drum 3 of the image forming unit of the image forming apparatus 100 and the transfer unit 6 (transfer unit).

FIG. 3 is a block diagram for explaining an embodiment of a copying machine to which the image forming apparatus of the present invention is applied.
The copying machine includes a paper feeding unit 101 that feeds recording paper, a printing unit 102 that prints an image on the recording paper, a paper discharging unit 103 that discharges the printed recording paper, and a paper discharge unit that stores the discharged recording paper. A paper tray unit 104 and a paper reversing unit 105 for reversing and re-feeding the recording paper during duplex printing are provided.

The sheet feeding unit 101 to the sheet discharge unit 103 are collectively referred to as a conveyance unit. Each part of the transport unit is provided with jam detection sensors 106, 107, and 108 as jam detection means, respectively, and specifies the place where the jam occurs on the transport path. These jam detection sensors 106 to 108 have a function of notifying the control unit 109 of a jam detection signal indicating the state when recording paper remains on the conveyance path during a jam.
The jam detection sensors 106, 107, and 108 can be installed at the positions shown in FIG. 2, but are not limited to these positions. The paper feeding unit 101, the printing unit 102, and the paper discharge unit 103 can be appropriately installed at appropriate positions.

  Further, as a configuration related to control, a control unit 109 that controls everything including the conveyance unit, an image storage unit 110 that stores a print image, a current page storage unit 111 that stores a current print page, and a user to perform an operation. The operation display unit 112 is provided. The operation display unit 112 includes, for example, a liquid crystal display screen and a touch panel. The operation display unit 112 may be configured to be separated into a display unit using a display screen and an operation unit such as a key or button that can be input by the user.

  In the configuration example of the above embodiment, the recording paper corresponds to the recording material of the present invention, and the control unit 109 corresponds to the control means of the present invention. The jam detection sensors 106 to 108 correspond to the jam detection unit of the present invention, and the operation display unit 112 corresponds to the display unit and the operation input unit of the present invention.

FIG. 4 is a flowchart for explaining a processing example when a jam occurs in the copying machine, and shows a processing example from the start to the end of the single-sided printing operation.
When the printing operation starts, first, the control unit 109 stores 1 as an initial value in the current page storage unit 111 (step S1), and feeds one recording sheet by the sheet feeding unit 101 to carry (step S2). ). If a jam has occurred in the paper feed unit 101 (step S3-YES), a jam process A described later is performed (step S9), and the printing process is resumed (step S11).

When the recording paper reaches the printing unit 102 without jamming by the paper feeding unit 101 (step S3-NO), the printing unit 102 receives the nth page data from the control unit 109 (step S4). Then, printing is performed on the recording paper by the printing unit 102 (step S5), and the recording paper is conveyed to the paper discharge unit 103. If a jam occurs in the printing unit (step S6-YES), a jam process A described later is performed (step S9) in the same manner as the jam of the paper feeding unit 101 (step S9), and the printing process is resumed (step S11).
When the recording paper reaches the paper discharge unit 103 without being jammed by the printing unit 102 and then jammed by the paper discharge unit 103 (step S7-YES), a jam processing B described later is performed (step S10), and printing is performed. The process is resumed (step S11).

  When the recording paper is not jammed in the paper discharge unit 103 (step S7—NO), the control unit 109 compares the value n of the current page storage unit 111 with the number m of printed pages, and determines whether printing is completed. Judgment is made (step S8). If n = m (step S8—YES), it is determined that printing of all pages has been completed, and the printing operation is terminated. If n.noteq.m (step S8-NO), 1 is added to the value n (step S12), and the above-described paper feeding operation is started for printing the next page (step S2).

FIG. 5 is a flowchart for explaining the operation of the jam processing A.
When the jam processing A is executed in accordance with the flowchart of FIG. 4, the copying machine stops driving for safety (step S21), and then enters a standby state waiting for completion of the jam recovery operation by the user (step S22). When the door of the copying machine is opened and closed, it is determined that the jam recovery operation has been completed (step S23-YES), and it is confirmed whether or not jammed recording paper remains in the copying machine (step S24).

  When jammed recording paper remains in the copying machine (step S24-NO), the above-described standby state is entered, and the completion of jam recovery operation is awaited (step S22). If there is no jammed recording paper in the copying machine (YES in step S24), it is determined that the jam recovery operation has been completed, and printing is resumed from the process of feeding one sheet by the paper feeding unit 101 (FIG. 4). Step S11).

FIG. 6 is a flowchart for explaining the operation of the jam processing B.
When the jam processing B is executed according to the flowchart of FIG. 4, the copying machine stops driving for safety (step S31), and then waits for the user to complete the jam recovery operation in the same manner as the jam processing A described above. (Step S32).

When the door of the copying machine is opened and closed, it is determined that the jam recovery operation has been completed (step S33-YES), and it is confirmed whether or not jammed recording paper remains in the copying machine (step S34).
When jam recording paper remains in the copying machine (NO in step S34), the above-described standby state is entered, and the completion of the jam recovery operation is awaited (step S32). If there is no jammed recording paper in the copying machine (YES in step S34), it is determined that the jam recovery operation has been completed, and the control unit 109 displays the operation display unit 112 to select a print resume page and displays Wait for input (step S35).

  When the user selects the resumption of printing from the recording paper page of the paper discharge unit 103 (step S36-YES), the printing resumption page is determined as the value n of the current page storage unit, and the above-described paper feeding operation is performed ( Step S11 in FIG. If the user has not selected to resume printing from the recording paper of the paper discharge unit 103 (step S36-NO), 1 is added to the value n (step S37), and then the process proceeds to the paper feeding operation described above (step S37). Step S11 in FIG. In this case, printing is resumed from the next page of the recording paper jammed by the paper discharge unit 103.

  7 and 8 are flowcharts showing from the start to the end of the duplex printing operation in the copying machine. When the printing operation starts, first, the control unit 109 stores 1 as an initial value in the current page storage unit 111 (step S41), and feeds one sheet of recording paper by the paper supply unit 101 to be conveyed (step S42). ). If a jam has occurred in the paper feed unit 101 (step S43—YES), a jam processing A described later is performed (step S57), and the printing process is resumed (step S64).

  When the recording paper reaches the printing unit 102 without being jammed by the paper feeding unit 101 (step S43—NO), the printing unit 102 receives the nth page data from the control unit 109 (step S44). Then, printing is performed on the recording paper by the printing unit 102 (step S45), and the recording paper is conveyed to the paper discharge unit 103. If the jam occurs in the printing unit 102 (step S46-YES), the above-described jam processing A is performed in the same manner as the jam of the paper feeding unit 101 (step S57), and the printing process is resumed (step S64).

  When the recording paper reaches the paper discharge unit 103 without being jammed by the printing unit 102 (NO in step S46), the control unit 109 compares the value n of the current page storage unit 111 with the number m of printed pages, It is determined whether printing has been completed (step S47). If n = m (step S47—YES) and no jamming has occurred in the paper discharge unit 103 (step S58—NO), it is determined that printing of all pages has been completed, and the printing operation is terminated. Conversely, when n = m (step S47-YES) and the paper discharge unit 103 has jammed (step S58-YES), the above-described jam processing B is performed (step S59), and the printing process is resumed (step S64). ).

  If n ≠ m in step S47, it is further checked whether the value n is an odd number or an even number (step S48). When the value n is an even number (step S48-NO) and the paper discharge unit 103 has jammed (step S60-YES), the above-described jam processing B is performed (step S59), and the printing process is resumed (step S59). S64). On the contrary, when the value n is an even number (step S48-NO), and when the paper discharge unit 103 does not jam (step S60-NO), it is determined that the printing of the nth page is completed, and the value n is set. 1 is added (step S61), and the above-described paper feeding operation is started for printing the next page (step S42).

  When the value n is an odd number in step S48, the recording paper is switched back by using the switching gate 9 and the reverse roller 19 in order to convey the recording paper to the refeed conveyance path. Specifically, it waits for the trailing edge of the recording paper to pass through the switching gate 9 (step S49), and after the trailing edge of the recording paper has passed through the switching gate 9, the switching gate 9 is rotated clockwise to refeed. The conveyance path is switched in the conveyance path direction (step S50). Then, the rotation direction of the reverse roller 19 is reversed, and the recording paper is conveyed in the direction of the refeed conveyance path (step S51).

  Then, it is determined whether or not the paper discharge unit 103 is jammed (step S52). If the paper is not jammed, it waits for the trailing edge of the recording sheet that has been switched back to pass through the switching gate 9 (step S53). After that, the switching gate 9 is rotated counterclockwise to switch the transport path in the paper discharge direction (step S54). Then, the rotation direction of the reversing roller 19 is rotated forward to transport the recording paper in the paper discharge direction (step S55). Then, it is determined that the printing of the nth page is completed, 1 is added to the value n (step S56), and the recording paper is conveyed to the paper feeding unit 101 through the refeed conveyance path for the printing of the next page.

  In the above switchback operation, when the paper discharge unit 103 has jammed (step S52-YES), the above-described jam processing A is performed (step S62), and the printing process is resumed (step S63).

FIG. 9 is a diagram illustrating a display example when the printing resumption page is selected on the operation display unit.
As described with reference to the above-described flowchart, the copying machine according to the present embodiment displays the operation display unit 112 for selecting a print resumption page only when the recording paper is jammed in the paper discharge unit 103. Then, according to the user input for the display, the page on which printing is resumed is determined. The display for selecting the print resuming page is performed in step S35 of FIG.

As shown in FIG. 9, two selectable print restart pages n and n + 1 are displayed on the operation display unit 112. The print restart page n is an image page (nth page) corresponding to the recording paper jammed by the paper discharge unit 103, and the print restart page n + 1 corresponds to the recording paper next to the recording paper jammed by the paper discharge unit 103. This is an image page (n + 1 page). According to these displays, the user can select an arbitrary resume page by operating a predetermined operation means (operation panel or the like).
Here, the image data of the print resuming page displayed on the operation display unit 112 can be extracted from the image data of all pages to be image-formed.

Here, when the jam detection sensor 108 provided in the paper discharge unit 103 causes a jam in the paper discharge unit 103, the control unit 109 of the copier is image data of the nth page that is an option as a print resume page. And the image data of the (n + 1) th page are acquired from the image storage unit 110. When it is determined that the recording paper in the apparatus has been removed, the acquired image data of the print resumption pages n and n + 1 are displayed as thumbnails on the operation display unit 112. When the user selects number 1 attached to the thumbnail, printing is resumed from the nth page, and when number 2 is selected, printing is resumed from the (n + 1) th page.
The display for selecting the print resuming page is not limited to the above example, and any display can be used as long as the user can select the resuming page.

  As described above, in this embodiment, the resume page is displayed in a selectable manner before returning after jam processing, accepts a user's selection input, and resumes the image forming operation based on the user's selection input. Thus, the user can easily select the resume page based on the display when returning after the jam occurs. More specifically, it is possible to select whether to restart from a recording sheet that has not passed through the jam sensor 108 of the paper discharge unit or to restart from the next page of the recording sheet that has not been completely removed.

Next, an embodiment of a document reading apparatus according to the present invention will be described.
FIG. 10 is a diagram for explaining a configuration example of an embodiment of the image reading apparatus of the present invention. The image reading apparatus includes document tables 51a and 51b made of platen glass. An automatic document feeder 60 is disposed above the document tables 51a and 51b, and a scanner optical system 50 is disposed below the document table 51.
The automatic document feeder 60 has the same function as the automatic document feeder 600 shown in FIG. 2, and can be applied to the copying machine shown in FIG. The scanner optical system 50 has the same function as the image reading apparatus shown in FIG. 2, and can be applied to the copying machine shown in FIG.

  The scanner optical system 50 includes a light source 52 that irradiates light onto a recording paper (hereinafter simply referred to as an original) on which an original image is formed, a CCD 55 that is a photoelectric conversion element, and a plurality of mirrors 53 that guide reflected light from the original to the CCD 55. And a through lens 54 that forms an image of reflected light from the document on the CCD 55.

  The self-propelled document feeder 60 is configured to function as a document cover that opens or closes the document table 51, and stores a document tray 61 on which documents are stacked, and a document that is discharged after being subjected to a reading process. And a paper discharge tray 62. The document tray 61 is provided with a document placement sensor 77 for detecting the presence or absence of a document.

  A document conveyance path 63 is formed until the document sent from the document tray 61 is discharged to the discharge tray 62 via the document reading position. In the document transport path 63, a pickup roller 64, a separating roller 65, a registration roller 66, a transport roller 67, and a paper discharge roller 68 are arranged from the upstream side (document tray 61 side). Here, the document reading position is a position facing the document table 51b in the document conveyance path 63, and is a position where an image of the document is read by the scanner optical system 50 described above.

A separating plate 69 is provided at a position facing the separating roller 65 with the document conveying path 63 interposed therebetween. A paper feed sensor 124 for detecting the paper feed state is disposed between the separating roller 65 and the registration roller 66 in the document transport path 63. Further, a document pressing plate 72 that presses the document to be read in the direction of the document table 51b is provided on the opposite side of the document table 51b across the document conveyance path 63.
An intermediate tray swinging plate (switching gate) 73 for selectively guiding the discharged document to either the intermediate tray 74 or the paper discharge tray 62 is provided in the vicinity of the paper discharge roller 68. .

  Next, the conveyance state of the recording paper in the document reading apparatus will be described. The documents placed on the document tray 61 are taken out from the document tray 61 by the pickup roller 64, and double feeding is prevented by the separation roller 65 and the separation plate 69 arranged on the downstream side of the pickup roller 64 one by one. It is sent out to the document conveyance path 63.

  The leading edge and the trailing edge of the document conveyed on the document conveyance path 63 are detected by the paper feed sensor 124. Then, the conveyance of the document is temporarily stopped with the leading edge of the document being in contact with the registration roller 66. In this way, the timing for guiding the recording sheet to the document reading position is adjusted by waiting the document at the position where the registration roller 66 is installed.

  When the timing for guiding the document to the document reading position is reached, the registration roller 66 is driven, and the document is conveyed toward the document reading position while preventing oblique feeding and the like. Then, image data is read by the above-described scanner optical system 50 while a force is applied to the document by the document pressing plate 72 in the direction of the document table 51b.

  When an image on only one side of a document is read (for example, single-sided image formation processing), the switching gate 73 is set at a position indicated by a solid line. In this case, the document transport path 63 is set in the direction of the paper discharge tray 62. Then, the document whose document image has been read at the document reading position is transported by the transport roller 67 and the discharge roller 68 and discharged onto the discharge tray 62. After the paper discharge roller 68, a paper discharge sensor 125 for detecting the original of the paper discharge unit is disposed.

  On the other hand, when reading images on both sides of the document (for example, double-sided image forming processing), the switching gate 73 is switched to the position indicated by the dotted line in FIG. When a document image on one side is first read at the document reading position, the document is discharged by the transport roller 67 and the discharge roller 68. At this time, the document is guided to the intermediate tray 74 by the switching gate 73.

  Then, with the trailing edge of the document held between the discharge rollers 68, the discharge rollers 68 stop and reversely rotate, and the document is conveyed in reverse. Then, the original is guided to the re-feed conveyance path 75 side by the branching section 76 and proceeds on the original conveyance path 63 in which the paper feed sensor 124 is provided. Further, similarly to the time of feeding from the document tray 61, the sheet is conveyed again by the registration roller 66, and the document image on the back side is read at the document reading position.

  The original on which the images on both sides are read in this manner is discharged by the transport roller 67 and the paper discharge roller 68. At this time, the switching gate 73 is again switched to the solid line position in FIG. As a result, the original from which the images on both sides are read is discharged onto the discharge tray 62.

  In the configuration shown in FIG. 10, an area having a paper feeding function including the pickup roller 64, the paper roller 65, the paper board 69, and the paper feed sensor 124 from the document tray 61 is a paper feed unit 121. An area having a recording paper reversing function including the intermediate tray 74, the switching gate 73, the paper discharge roller 68, and the refeed conveyance path 75 is defined as a document reversing unit 120. Further, an area having a paper discharge function including the registration roller 66, the conveyance roller 67, the paper discharge roller 68, and the paper discharge sensor 125 is referred to as a paper discharge unit 123. An area on the conveyance path including a document reading position where an image is read by the scanner optical system 50 is defined as a reading unit 122. A region including the paper discharge tray 62 is referred to as a paper discharge tray unit 131.

  In the present embodiment, the paper feed unit 121 and the paper discharge unit 123 are provided with sensors (paper feed sensor 124 and paper discharge sensor 125) for detecting a document. According to the detection results of these sensors, when a jam occurs on the conveyance path, the user can select a page on which the document reading process is resumed according to the position where the jam has occurred.

FIG. 11 is a block diagram for explaining an embodiment of the document reading apparatus of the present invention.
The document reading device includes a paper feeding unit 121 for feeding a document, a reading unit 122 for reading an image of the document, a paper discharge unit 123 for discharging the image-read original, and a discharged document. A paper discharge tray unit 131 and a document reversing unit 120 that reverses and re-feeds the document when reading a double-sided image are provided.

  The paper feeding unit 121 to the paper discharge unit 123 are collectively referred to as a conveyance unit. Among the transport units, the paper feed unit 121 and the paper discharge unit 123 are provided with the above-described recording paper detection sensors (the paper feed sensor 124 and the paper discharge sensor 125). With these recording paper detection sensors, it is possible to detect a jam in the recording paper.

Further, as a configuration related to the control, a transport mechanism (paper feeding unit 121, paper discharge unit 123) and a paper feed sensor 124 of the transport unit, a transport control unit 126 for controlling the paper discharge sensor 125, and a reading for controlling the reading unit 122. A control unit 127, an image storage unit 128 that stores the read image, a current page storage unit 129 that stores the current read page, and an operation display unit 130 that is operated by the user are provided. The operation display unit 130 can be composed of, for example, a liquid crystal display device and a touch panel. The operation display unit 130 may be configured to be divided into a display unit using a display screen and an operation unit such as a key or button that can be input by the user.
The reading control unit 127 controls the reading operation of the image reading apparatus including the scanner optical system together with the reading unit included in the transport unit.

  The paper feed sensor 124 and the paper discharge sensor 125 are provided for the purpose of detecting the position of the original on the original transport path and identifying the location where the jam has occurred. The paper feed sensor 124 and the paper discharge sensor 125 notify the conveyance control unit 126 of a jam detection signal indicating the state when a document remains on the conveyance path during a jam.

  In the configuration example of the above embodiment, the transport control unit 126 corresponds to the control unit of the present invention, and the paper feed sensor 124 and the paper discharge sensor 125 correspond to the jam detection unit of the present invention. The operation display unit 130 corresponds to the operation input unit of the present invention.

FIG. 12 is a flowchart for explaining a processing example at the time of jam in the document reading apparatus, and shows a processing example from the start to the end of the single-sided reading operation.
When the document reading operation starts, first, the transport control unit 126 stores 1 as an initial value in the current page storage unit 129 (step S71), and feeds one document by the sheet feeding unit 121 to be transported (step S71). S72). Then, the conveyance control unit 126 sends a signal for starting the reading control to the reading control unit 127 (step S73).

  If a jam has occurred in the paper feed unit 121 (step S74-YES), a jam process C described later is performed (step S77), and the document reading process is resumed (step S79). Here, a jam occurs when the leading edge of the document does not reach the detection position of the paper feed sensor 124 within a predetermined time, or when the trailing edge of the document does not come out within the predetermined time at the detection position of the paper feed sensor 124. Can be judged.

  When the original reaches the paper discharge unit 123 without jamming at the paper supply unit 121 (step S74—NO), it is determined whether or not the original has jammed at the paper discharge unit 123 (step S75). If the paper discharge unit 123 does not jam, the conveyance control unit 126 determines whether the reading is completed (step S76). If the reading is not completed, the conveyance control unit 126 adds 1 to the value n of the current page storage unit 129 (step S80), and proceeds to the above-described paper feeding operation for reading the next page of the document (step S80). Step S72).

  If the recording paper jams at the paper discharge unit 123 after reaching the paper discharge unit 123 without jamming at the paper feed unit 121 (step S75-YES), a jam processing D described later is performed (step S78). The document reading process is resumed (step S79). Here, when the leading edge of the document does not reach the paper discharge sensor 125 of the paper discharge unit 123 within a predetermined time, or when the trailing edge of the document does not come out within the predetermined time at the detection position of the paper discharge sensor 125, the paper discharge is performed. It can be determined that a jam has occurred in the section 123.

  FIG. 13 is a flowchart for explaining the operation of the jam processing C. When the jam processing C is executed in accordance with the flowchart of FIG. 12, the document reading apparatus stops driving for safety (step S81), and then waits for the user to complete the jam recovery operation (step S82). When the cover of the document reading device is opened / closed, it is determined that the jam recovery operation has been completed (step S83-YES), and it is confirmed whether or not a jammed document remains in the document reading device (step S84).

  If a jammed document remains in the document reading device (NO in step S84), the standby state described above is entered, and the completion of the jam recovery operation is awaited (step S82). If there is no jammed document in the document reading device (YES in step S84), it is determined that the jam recovery operation is completed, the document data n is cleared, and the sheet feeding unit 121 feeds one sheet. The document reading is restarted from the processing (step S72 in FIG. 12).

FIG. 14 is a flowchart for explaining the operation of the jam processing D.
When the jam processing D is executed according to the flowchart of FIG. 12, the document reading apparatus stops driving for safety (step S91), and then waits for the user to complete the jam recovery operation in the same manner as the above-described jam processing C. (Step S92).

If the cover of the document reading device is opened and closed, it is determined that the jam recovery operation has been completed (step S93-YES), and it is confirmed whether or not a jammed document remains in the document reading device (step S94).
If a jammed document remains in the document reading device (NO in step S94), the standby state described above is entered, and the completion of the jam recovery operation is awaited (step S92). If there is no jammed document in the document reading device (YES in step S94), it is determined that the jam recovery operation has been completed, and the conveyance control unit 126 performs a display for causing the operation display unit 130 to select a document reading resume page. And waits for user input (step S95).

  When the user selects to restart the document reading process from the document page of the paper discharge unit 123 (YES in step S96), the value n of the document data in the current page storage unit 129 is cleared, and the above-described paper feeding operation is performed. (Step S72 in FIG. 12). Further, when the user does not select the resumption of image reading from the original of the paper discharge unit 123 (step S96-NO), after adding 1 to the value n (step S98), the process proceeds to the paper feeding operation described above (step S98). Step S72 in FIG. 12).

  15 and 16 are flowcharts showing the start and end of the double-sided document reading operation. When the document reading operation starts, first, the transport control unit 126 stores 1 as an initial value in the current page storage unit 129 (step S101), and feeds one sheet of document by the sheet feeding unit 121 to perform transport (step S101). S102). Then, the conveyance control unit 126 sends a signal for starting reading control to the reading control unit 127 (step S103), and performs switching control of the switching gate 73 (step S104). Here, the gate 73 is controlled to rotate in the clockwise direction, and the position of the gate 73 is controlled so as to be the position of the solid line from the position of the dotted line in FIG.

  If a jam has occurred in the paper feed unit 121 (step S105-YES), a jam process C described later is performed (step S115), and the document reading process is resumed (step S122). Here, when the leading edge of the document does not reach the paper discharge sensor 125 of the paper discharge unit 123 within a predetermined time, or when the trailing edge of the document does not come out within the predetermined time at the detection position of the paper discharge sensor 125, the paper discharge is performed. It can be determined that a jam has occurred in the section 123.

  If the original reaches the paper discharge unit 123 without jamming by the paper supply unit 121 (NO in step S105), the conveyance control unit 126 determines whether the reading of the original is completed (step S106). Here, when the document placement sensor 77 provided on the document tray 61 detects that there is no document on the document tray 61, it is determined that the document reading is completed.

  When the reading of the original is completed (step S106-YES) and the paper discharge unit 123 has not jammed (step S116-NO), it is determined that the reading of all pages has been completed, and the original reading operation is terminated. . On the contrary, when the reading of the original is completed (step S106-YES) and the paper discharge unit 123 has jammed (step S116-YES), the above-described jam processing D is performed (step S117), and the original reading process is resumed. (Step S122).

  If the reading is not completed in step S106, it is further determined whether or not the paper is fed from the paper feeding unit 121 (step S107). If the paper is not fed from the paper feed unit 121 (step S107-NO) and jammed in the paper discharge unit 123 (step S118-YES), the above-described jam processing D is performed (step S117), and the document reading process is resumed. (Step S122). The fact that the paper is not fed from the paper feed unit 121 indicates that the original is for back side reading fed from the intermediate tray 74 through the refeed conveyance path 75.

  Conversely, if the paper is not fed from the paper feeding unit 121 (step S107—NO) and the paper ejection unit 123 has not jammed (S118—NO), it is determined that reading of the nth page has been completed, and the value n 1 is added (step S119), and the above-described paper feeding operation is started for reading the next page image (step S102).

  If the paper is fed from the paper feeding unit 121 in step S107, the original is for front side reading, and the switching gate 73 and the paper discharge roller 68 are used to transport the original to the refeed conveyance path 75. Then, switch back the document. Specifically, in a state where the switching gate 73 is set to the position of the dotted line in FIG. 10, it waits for the trailing edge of the document to pass the branching portion 76 (step S108), and after the trailing edge of the document has passed the branching portion 76. The paper discharge roller 68 is reversed to guide the original in the direction of the refeed conveyance path 75 (step S109).

  Then, it waits for the trailing edge of the document sent to the refeed conveyance path 75 to pass the paper discharge roller 68 (step S110), and the switching gate 73 is rotated counterclockwise to indicate the position indicated by the solid line in FIG. (Step S111). Then, after the original passes through the re-feed conveyance path 75 and the image on the back side is read, the paper discharge roller 68 is rotated forward again to discharge the original to the paper discharge tray 62 (step S112).

  At this time, if the original is jammed in the paper discharge unit 123 (step S113: YES), the above-described jam processing C is performed (step S120), and the printing process is resumed (step S121). If the paper discharge unit 123 does not jam (step S113-NO), it is determined that the original reading of the nth page is completed, and 1 is added to the value n (step S114), and the next page is printed. Then, the document is conveyed to the sheet feeding unit 121 through the refeed conveyance path.

  FIG. 17 is a flowchart for explaining an example of the control of the reading control unit. First, it is monitored whether the paper feed sensor 124 has detected the leading edge of the document (step S131). When the paper feed sensor 124 detects the leading edge of the document, it waits until the document is conveyed to the document reading position (step S132). When the document is conveyed to the document reading position, the document reading process is performed (step S132). S133). Then, the document reading process is continued until a predetermined time elapses (steps S134 and S133), and the document reading control is ended after the predetermined time elapses.

FIG. 18 is a diagram illustrating a display example when the manuscript reading process page is selected on the operation display unit when the manuscript reading process is resumed.
As described with reference to the above-described flowchart, the document reading apparatus according to the present exemplary embodiment displays a display for causing the operation display unit 130 to select a document reading restart page only when the document is jammed in the paper discharge unit 123. Do. Then, according to the user input for the display, the page on which the document reading is resumed is determined. The display for selecting the document reading restart page is performed in step S95 in FIG.

The operation display unit 130 displays an image page (n pages) of a document read when a jam occurs. FIG. 18A shows a display example when an n-page original image can be read normally, and FIG. 18B shows that all the n-page original images cannot be read normally. A display example is shown (the lower 1/3 area of the original is not read).
The user confirms the image page displayed on the operation display unit 130, and, for example, when the document reading of the page is completed as shown in FIG. From page (n + 1).
On the other hand, for example, as shown in FIG. 18B, when the document reading of the page is not completely completed, “YES” is selected and input, and the image reading is restarted from page n again.
With such display, the user can select an arbitrary resume page by operating a predetermined operation means (operation panel or the like).

  In the above example, the image page displayed on the operation display unit 130 is a page from which the image data of the document has already been read. That is, as the image page displayed on the operation display unit 130, the image page read last can be displayed.

  By displaying such read image data, the user can determine whether all the originals have been normally read or whether the reading has not been completed. Based on the determination result, the paper discharge unit It is possible to select whether to re-read a document that has not passed through 123 or to re-read from the next page.

  Note that the user selection screen as described above is not limited to the example shown in FIG. 18 described above, and as shown in FIG. 9 described above, selectable page images are displayed side by side within one screen, and the user can arbitrarily select from the display screen. The original reading resume page may be selected, and the display format of the screen is not limited.

  As described above, in the present embodiment, a document reading restart page is displayed in a selectable manner before returning after jamming processing, accepts a user's selection input, and resumes the document reading operation based on the user's selection input. . Thus, the user can easily select the resume page based on the display when returning after the jam occurs. Specifically, it is possible to select whether to resume from a document that has not passed through the paper ejection sensor 125 of the paper ejection unit 123 or to resume from the next page of the document that has not been completely removed.

1 is a diagram for explaining a configuration example of an embodiment of an image forming apparatus of the present invention. FIG. 2 is a diagram for explaining a configuration example of a copying machine using the image forming apparatus shown in FIG. 1. 1 is a block diagram for explaining an embodiment of a copying machine to which an image forming apparatus of the present invention is applied. 6 is a flowchart for explaining a processing example when a jam occurs in the copying machine. It is a flowchart for demonstrating operation | movement of the jam process A concerning embodiment of this invention. It is a flowchart for demonstrating operation | movement of the jam process B regarding embodiment of this invention. 6 is a flowchart for explaining from the start to the end of a double-sided printing operation in a copying machine. FIG. 8 is a flowchart for explaining from the start to the end of the double-sided printing operation in the copying machine, following FIG. 7. FIG. 10 is a diagram illustrating a display example when a print resume page is selected on the operation display unit. It is a figure for demonstrating the structural example of one Embodiment of the image reading apparatus of this invention. 1 is a block diagram for explaining an embodiment of a document reading apparatus of the present invention. FIG. 6 is a flowchart for explaining a processing example when a jam occurs in the document reading apparatus. It is a flowchart for demonstrating operation | movement of the jam process C regarding embodiment of this invention. It is a flowchart for demonstrating operation | movement of the jam process D concerning embodiment of this invention. 5 is a flowchart for explaining from the start to the end of a double-sided document reading operation. FIG. 16 is a flowchart for explaining from the start to the end of the double-sided document reading operation, and is a diagram continued from FIG. 15. 6 is a flowchart for explaining an example of control of a reading control unit. FIG. 10 is a diagram illustrating a display example when a manuscript reading process page is selected on the operation display unit when the manuscript reading process is resumed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Optical scanning unit, 2 ... Development unit, 3 ... Photoconductor drum, 4 ... Cleaning unit, 5 ... Charging means, 6 ... Transfer means, 7 ... Static elimination lamp, 8 ... Fixing device, 8a ... Fixing roller, 8b ... Addition Pressure roller, 9 ... switching gate, 10 ... supply tray, 11 ... power supply, 12 ... control unit, 13 ... developer supply container, 14 ... recording paper receiving port, 15 ... extended recording paper receiving unit, 16 ... pick-up roller, DESCRIPTION OF SYMBOLS 17 ... Registration roller, 18 ... Conveyance roller, 19 ... Reverse roller, 20 ... Stacking tray, 21 ... Pick-up roller, 22 ... Rolling roller, 31, 32, 33 ... Recording paper supply part, 34 ... Recording paper discharge part, 41 ... Recording paper supply unit, 42 ... Recording paper discharge unit, 50 ... Scanner optical system, 51, 51a, 51b ... Original plate, 52 ... Light source, 53 ... Mirror, 54 ... Through lens, 55 ... CCD, 60 ... Auto Document transport device 61 ... Document tray, 62 ... Paper discharge tray, 63 ... Document transport path, 64 ... Pickup roller, 65 ... Separation roller, 66 ... Registration roller, 67 ... Conveyance roller, 68 ... Paper discharge roller, 69 ... Paper Plate 71 71 Rotation fulcrum 72 72 Document pressing plate 73 Switching gate 74 74 Intermediate tray 75 Refeed conveyance path 76 Branching unit 77 Document placement sensor 81 First recording paper Ejection unit, 82 ... second recording paper ejection unit, 83 ... receiving and conveying unit, 100 ... image forming apparatus, 101 ... paper feeding unit, 102 ... printing unit, 103 ... paper ejection unit, 104 ... paper ejection tray unit, 105 ... Paper reversing unit 106, 107, 108 Jam detection sensor 109 109 Control unit 110 Image storage unit 111 Current page storage unit 112 Operation display unit 120 Document reversing unit 121 Paper feeding unit 122 ... Reading , 123 ... paper discharge unit, 124 ... paper feed sensor, 125 ... paper discharge sensor, 126 ... transport control unit, 127 ... reading control unit, 128 ... image storage unit, 129 ... current page storage unit, 130 ... operation display unit, 131: paper discharge tray unit, 200: recording paper refeeding and conveying device, 300 ... first recording paper feeding device, 400 ... second recording paper feeding device, 500 ... image reading device, 600 ... automatic document conveying device, 700 ... relay Conveying device, 800... Post-processing device.

Claims (15)

In an image forming apparatus that continuously forms and outputs a plurality of pages of image data on a recording material, the image forming apparatus includes: a control unit that controls operation of the image forming apparatus; and a conveyance path of the recording material A jam detecting means for detecting a jam and an operation input means for accepting a user operation;
When the jam is detected by the jam detecting unit during the image forming operation and the jam processing is performed and the image forming operation is restored, the control unit performs the image forming operation from the page selected by the operation by the operation input unit. Resuming the image forming apparatus.   2. The image forming apparatus according to claim 1, wherein the control unit resumes the image forming operation only when a jam occurrence point detected by the jam detection unit is a predetermined specific occurrence point. An image forming apparatus capable of selecting a page.   3. The image forming apparatus according to claim 2, wherein the specific occurrence location is an installation position of the jam detection unit provided in the vicinity of a paper discharge roller for discharging the recording material from the image forming apparatus. An image forming apparatus.   The image forming apparatus according to claim 1, wherein the control unit extracts the selectable page options from image data of all pages on which image formation is performed.   2. The image forming apparatus according to claim 1, wherein the control unit can select a page on which the image forming operation is resumed only when the step of the image forming operation is a predetermined specific operation. An image forming apparatus.   6. The image forming apparatus according to claim 5, wherein during the specific operation, an image is formed on a back surface when an image is formed on only one surface of a recording material, or when images are sequentially formed on the front surface and the back surface of the recording material. An image forming apparatus characterized by being in formation. In a document reading device that automatically conveys recording paper on which a document image is formed and reads image data of the document image, the document reading device includes control means for controlling the operation of the document reading device, and the recording A jam detecting means for detecting a jam in the material conveyance path, and an operation input means for accepting a user operation,
When the jam detection unit detects a jam during the document reading operation and the jam processing is performed and the document reading operation is restored, the control unit reads the document from the page selected by the operation input unit. A document reading apparatus characterized by resuming.   8. The document reading apparatus according to claim 7, wherein the control unit resumes the document reading operation only when a jam occurrence point detected by the jam detection unit is a predetermined specific occurrence point. A document reading apparatus characterized in that a page can be selected.   9. The document reading apparatus according to claim 8, wherein the specific occurrence location is an installation position of the jam detection means provided in the vicinity of a paper discharge roller for discharging the recording material from the document reading device. A document reading apparatus characterized by the above.   10. The document reading apparatus according to claim 9, wherein the control unit can select a page read last before the jam occurs as a page for restarting the document reading operation. apparatus.   8. The document reading apparatus according to claim 7, wherein the control unit can select a page for resuming the document reading operation only when the document reading operation is performed in a predetermined specific operation. An original reading apparatus characterized by the above.   12. The document reading apparatus according to claim 11, wherein the specific operation is performed when reading a single-sided image in which only one side of the recording material is read, or in reading an image on the back side when sequentially reading the front and back sides of the recording material. An original reading apparatus characterized by comprising:   A copying machine comprising the image forming apparatus according to claim 1.   A copying machine comprising the document reading device according to any one of claims 7 to 12.   A copying machine comprising the image forming apparatus according to any one of claims 1 to 6 and the document reading device according to any one of claims 7 to 12.

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