JP2019089268A - Image forming apparatus - Google Patents

Abstract

To provide an image forming apparatus capable of easily recognizing a slip sheet for a spoilage sheet among slip sheets for chapter division and slip sheets for a spoilage sheet being the same sheets as the sheets for chapter division mixed in a discharged sheet bundle.SOLUTION: An image forming apparatus includes: an image formation part 15; a spoiled image determination part 33 for detecting whether an image-formed sheet is a spoilage sheet; a slip sheet output part 36 for outputting a supplied sheet as a slip sheet to a stacker; a first instruction part 34 for instructing a slip sheet output part 36 to output a slip sheet when a spoilage sheet is detected; a first storage part 35 for storing a load order in the stacker of the slip sheet outputted by an instruction of the first instruction part; a second instruction part 38 for instructing the slip sheet output part 36 to output a slip sheet for chapter division; a second storage part 39 for storing a load order in the stacker of the outputted slip sheet for chapter division; and a spoilage sheet information display control part 41 for differentially displaying the slip sheet for spoilage sheet extraction and the slip sheet for chapter division loaded on the stacker on the basis of information of a slip sheet for spoilage sheet extraction existing in the first storage part 35 and information of a slip sheet for chapter division existing in the second storage part 39.SELECTED DRAWING: Figure 2

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an image forming apparatus capable of outputting an interleaf sheet at a position of waste paper in sheets discharged to a stacker.

  In an image forming apparatus used in a printing factory or the like, a scanner is provided on a conveyance path downstream of an image forming unit, and an image on a sheet is read by the scanner to detect a waste sheet. However, normally, since the detected waste paper is also discharged to the same delivery tray and stacker as a normal product, it is necessary to identify and remove the waste paper from the loaded sheets.

  One method of indicating the position of the waste paper in the sheet bundle stacked on the paper discharge tray or the like is a method of outputting the interleaf at a position where the waste paper is present. As shown in FIG. 11, the slip sheet is slightly offset from the normal paper and discharged to the paper discharge tray, so that the user relies on the position of the slip sheet after the output is completed to remove the waste paper from the sheet bundle. be able to.

  In addition, the information (when in the whole of the entire sheet etc.) information on the occurrence of scraping at the time of output is held in the storage unit, and an image is displayed on the operation panel to display information on defective points in the output. There is also a forming apparatus (see Patent Document 1 below).

JP, 2005-2057227, A

  In order to output a booklet with chapter division, three types of paper, a cover, a body, and an interleaf for chapter division, are used, and three paper feed trays are required. Here, when there are only three paper feed trays of the printing apparatus, all three paper feed trays are required, and therefore it is not possible to separately prepare an interleaf paper feed tray for waste paper extraction. Therefore, there is a case where the same sheet as the chaptering interleaf is used as the interleaf for extracting the waste paper.

  In this case, as shown in FIG. 12, it is not possible to distinguish between the chaptering interleaf sheet and the slippage paper extraction interleaf sheet, and it becomes difficult to remove the slippage paper by relying on the interleaf paper extraction paper.

  The technique disclosed in Patent Document 1 is a technique for indicating the position of the waste paper without using a slip sheet for extracting waste, and the above-mentioned problem is not solved.

  The present invention is intended to solve the above-mentioned problems, and it is possible to remove a scraping sheet from a sheet for separating chapters mixed in a bundle of discharged sheets and a sheet for extracting waste paper from the same sheet. An object of the present invention is to provide an image forming apparatus capable of easily recognizing an interleaf sheet for paper extraction.

  The subject matter of the present invention for achieving such an object resides in the inventions of the following items.

[1] An image forming unit for forming an image on a fed sheet and discharging it
A waste detection unit that detects whether the sheet discharged from the image forming unit is a waste paper;
An interleaf output unit configured to output, as interleaf, a sheet fed from one paper feed tray to a stacker of sheets discharged from the image forming unit;
A first instruction unit that instructs the interleaving paper output unit to output the interleaving paper for the incising paper extraction when the ineffective paper detection is detected by the inelasticity detection unit;
A first storage unit that stores the stacking order of the slip sheet for waste paper extraction, which is output according to the instruction of the first instruction unit, in the stacker;
A second instruction unit that instructs the interleaving paper output unit to output a normal interleaving paper that is an interleaving paper other than for waste paper extraction;
A second storage unit that stores the stacking order of the normal interleaf in the stacker output by the instruction of the second instruction unit;
The stacker is stacked on the stacker based on the information on the stacking order of the slip sheet for waste paper extraction stored in the first storage unit and the information on the stacking order of the normal slip stored in the second storage unit. A display control unit for displaying on a display unit the position of the insertion paper for waste paper extraction in the insertion paper for both the insertion paper for waste paper extraction and the normal insertion paper;
An image forming apparatus comprising:

  In the above invention, the paper fed from the one paper feed tray is output to the stacker as a slip sheet for waste paper extraction, and a slip sheet other than for slip sheet extraction such as a chapter separation paper (usually a slip sheet ) Is also output to the stacker. The first storage unit records the stacking order of sheets output to the stacker as a slip sheet for waste paper extraction, and the second storage unit records the stacking order of sheets output to the stacker as a regular interleaf sheet . The display control unit is mounted on the stacker on the basis of the information on the stacking order of the slip sheet for removing the removal paper in the first storage unit and the information on the stacking order of the normal slip in the second storage unit. The position of the insertion paper for waste paper extraction in the insertion paper for both the paper extraction and the normal insertion paper is displayed on the display unit.

[2] The display control unit is configured to display the position of each interleaving paper stacked on the stacker as a method of displaying the position of the interleaving paper for the waste paper extraction in the both interleaving papers. The image forming apparatus according to [1], wherein the interleaving paper and the ordinary interleaving paper are displayed separately.

  In the above-described invention, the separating sheets for waste paper extraction stacked on the stacker and the normal inserting sheets are distinguished to display the positions of these sheets.

[3] The image forming apparatus according to [2], wherein the display control unit displays the number of stacked sheets from one slip sheet to a next slip sheet.

  In the above invention, the relative position between the interleaving paper and the next interleaving paper is indicated by the number of sheets in between.

[4] As a method of displaying the position of the slip sheet for removing the scrap paper among the both slip sheets, the display control unit is a slip sheet for the scrap paper extraction and the slip sheet stacked on the stacker. The image forming apparatus according to [1], wherein the order of the insertion sheets for waste paper extraction is displayed in the both sheets.

  In the above invention, the position of the insertion sheet for waste paper extraction is displayed in the order of the top from the top in the entire insertion sheet.

[5] The display control method of the position of the slip sheet for sagging paper extraction by the display control unit, a first display method for displaying the position of the slip sheet for sagging paper extraction among the both sheets, and the first display method 1) A switching unit is provided that switches to a second display method that displays only the position of the insertion sheet for waste paper extraction based on the information on the stacking order of the insertion paper for waste paper extraction stored in the storage unit. The image forming apparatus according to any one of [1] to [4].

  In the above invention, it is possible to switch to the second display method of displaying only the stacking order of the slip sheet for waste paper extraction.

  According to the image forming apparatus of the present invention, even in the case where the stack of discharged sheets includes a sheet for dividing into chapters and a sheet for extracting the same waste paper as the mixed sheet, these sheets are also included in these sheets. Therefore, it is possible to easily recognize a slip sheet for waste paper extraction.

FIG. 1 is a diagram showing a configuration of an image forming apparatus according to an embodiment of the present invention. FIG. 6 is a block diagram showing functional parts and the like related to display of waste paper identification information of the image forming apparatus. It is a figure which shows the example of the レ mark insertion paper information list memorize | stored in the 履 歴 history information buffer. It is a figure which shows an example of the chapter division paper sheet information list memorize | stored in a chapter division information buffer. It is a flowchart which shows the process which records information on a paper-sheet in a chapter division information buffer and a slip history information buffer during job execution. It is a figure which shows the 1st example of a display of waste paper identification information. It is a figure which shows the 2nd example of a display of waste paper identification information. It is a figure which shows the example of a display by a 2nd display method. FIG. 7 is a diagram showing a display example of waste paper identification information when a large number of output sheets of a job are generated and a large amount of slip sheets are generated. It is a flowchart which shows the process regarding the display of waste paper identification information. FIG. 7 is a view showing an example of a state in which a sheet bundle including a waste mark interleaf is stacked on a stacker. FIG. 7 is a view showing an example of a state in which a sheet bundle including a waste mark interleaf and a chapter interleaf on the same sheet is stacked on a stacker;

  Hereinafter, embodiments of the present invention will be described based on the drawings.

  FIG. 1 shows the configuration of an image forming apparatus 10 according to an embodiment of the present invention. The image forming apparatus 10 includes a main unit 11 including an image forming unit 15 that forms an image on a fed sheet and discharges the sheet, and a plurality of supplies for storing sheets fed to the image forming unit 15 of the main unit 11. A scanner provided on the downstream side of the paper tray 12 and the image forming unit 15 of the main body 11 and reading an image on the paper for detecting whether the paper discharged from the image forming unit 15 is a waste paper The scanner unit 13 includes a stacker 14 provided downstream of the scanner unit 13 and sequentially stacking the sheets that have passed through the scanner unit 13. In the image forming apparatus 10, the sheet fed from the sheet feeding tray 12 is conveyed so as to be discharged to the stacker 14 via the image forming unit 15 and the scanner unit 13, and the scanner unit 13 Read optically.

  The paper feed tray 12 has three paper feed trays, ie, a paper feed tray 1, a paper feed tray 2, and a paper feed tray 3. Here, the sheet for the cover of the booklet is stored in the sheet feed tray 1, the sheet for the body is stored in the sheet feed tray 2, and the sheet to be used as the interleaf for chapter division is stored in the sheet feed tray 3. The paper of the paper feed tray 3 is also used as a slip sheet for waste sheet extraction (hereinafter, this will be referred to as a slip mark slip sheet). As shown in FIG. 11 and FIG. 12, the sheets discharged to the stacker 14 as interleaf are offset from other sheets in a predetermined direction and discharged.

  The image forming apparatus 10 sequentially reads the sheet on which the image is formed by the image forming unit 15 by the scanner unit 13 and discharges the sheet to the stacker 14. When it is determined that the read sheet is a slippery sheet, an output instruction of the slippage mark insertion sheet is output. In response to this instruction, the image forming apparatus 10 feeds a sheet from the sheet feeding tray 3, offsets the sheet as a slip mark sheet, and discharges the sheet to the stacker 14.

  In the image forming apparatus 10 according to the present embodiment, the stacker 14 includes both the waste mark interleaf and the interleaf other than the waste interleave sheet such as the interleaf for separating the chapter (hereinafter referred to as a normal interleaf). It has a function of displaying on the display unit of the operation panel 16 information (peelless sheet identification information) capable of easily discriminating and recognizing the ruby mark interleaf sheet from among all the interleaf sheets loaded on the sheet. In the following examples, a case will be described by way of example in which the interleaving paper is a chaptering interleaving paper.

  FIG. 2 is a block diagram showing a schematic configuration of the image forming apparatus 10 and a functional part related to the display of the waste paper identification information. The image output from the image forming unit 15 of the main unit 11 is read by the image reading sensor 21 of the scanner unit 13 by the image reading sensor 21, and the image of the back surface of the sheet is read by the reverse image reading sensor 22. Is read. Data of the read image output from the front image reading sensor 21 and the reverse image reading sensor 22 is transmitted by the image transmitting unit 23 to the image receiving unit 31 of the main body unit 11.

  Data of the read image received by the image reception unit 31 from the image transmission unit 23 is written and stored in the read image buffer 32. The smear image judgment unit 33 reads out the data of the read image from the read image buffer 32 and analyzes it, and judges in real time whether or not the sheet read by the scanner unit 13 is a scrap paper.

  The first instructing unit 34 instructs the interleaving paper output unit 36 to output a waste mark interleaving paper when the judgment result of the infiltrating image judgment unit 33 is “perforated paper”. Further, in accordance with this instruction, the sheet number (corresponding to the stacking order in the stacker 14) and the like of the waste mark interleaf output by the interleaf output part 36 is stored in the loss history information buffer 35 (first storage part). The slip sheet output unit 36 outputs the slippage mark slip sheet when the above instruction is received. Specifically, a sheet is fed from the sheet feeding tray 3, and the sheet is passed through the image forming unit 15 and the scanner unit 13, and is offset to the stacker 14 and discharged to the stacker 14.

  The job control unit 37 manages the execution of a job, and controls printing and output of a cover, a body, chapter division paper, and the like. The second instruction unit 38 of the job control unit 37 outputs an instruction to output the chapter division paper to the insertion paper output unit 36 when it is time to insert the chapter paper in the job. Further, in accordance with this instruction, the sheet number (corresponding to the stacking order in the stacker 14) of the chapter division interleaf output by the interleaf output portion 36 is stored in the chapter division information buffer 39 (second storage portion). When receiving the above-described instruction, the paper-insertion unit 36 outputs the chapter-inserted paper to the stacker 14 in the same manner as in the case of the waste-mark paper.

  When the waste paper information display control unit 41 receives a request for displaying waste history information from the user on the operation panel 16, the waste paper information display control unit 41 is stacked on the stacker 14 based on the information read from the waste history information buffer 35 and the chapter division information buffer 39. A control is performed to create waste paper identification information indicating the position of the waste mark interleaf in the interleaves of both the left side mark paper and the normal interleaf sheet, and control to display this on the display unit of the operation panel 16.

  The switching unit 42 of the waste paper information display control unit 41 has a first display method for displaying the waste paper identification information, and a second display method for displaying only the information of the waste mark paper without including the information of the normal paper. Switch the display method of the information about the waste paper. Switching by the switching unit 42 is performed according to a switching operation from the user received on the operation panel 16.

  FIG. 3 shows an example of information stored in the file history record buffer 35. A sheet number indicating which sheet the insertion position of the waste mark interleaf is from the head of the job, and the number of removed sheets indicating how many sheets should be removed from the position where the waste mark interleaf is present Then, it is registered in the dust mark interleaf information list 50. When waste paper is detected a plurality of times, the sheet number and the number of removed sheets are sequentially recorded in the waste mark interleaf information list 50 for each detection. In the case of continuous printing, even if a sheet serving as a waste mark interleaf is sent out from the paper feed tray 3 immediately after the scanner unit 13 detects a waste paper, transport between the waste paper and the sheet serving as a waste mark interleaf There are several sheets of paper on the street. Therefore, the number of sheets for removing all the sheets between the waste sheet and the waste mark interleaf is indicated by the number of removed sheets.

  FIG. 4 shows an example of information recorded in the chapter division information buffer 39. As shown in FIG. The sheet numbers indicating in which sheet the insertion position of the chapter paper is from the beginning of the job are sequentially recorded in the chapter paper information list 52.

  FIG. 5 is a flow chart showing a process of recording the information of the interleaf in the chapter division information buffer 39 and the deletion history information buffer 35 during job execution. When the job is started, first, a variable n indicating a sheet number is initialized to 1. Next, it is determined whether or not the nth sheet is a chapter dividing sheet, and if it is not a chapter dividing sheet (step S102; No), the nth sheet is a main body (or a cover) and normal printing processing is performed Then (step S103), the process proceeds to step S106.

  If the n-th sheet is a chapter dividing sheet (step S102; Yes), the n-th sheet is output as a chapter dividing sheet (step S104). That is, the second instruction unit 38 outputs an instruction to output the interleaving paper to the interleaving paper output unit 36, and the interleaving paper output unit 36 that receives the instruction outputs the sheet fed from the paper feed tray 3 as the chapter dividing paper. Paper is discharged. Further, the second instructing unit 38 additionally registers information indicating that the n-th sheet is the chapter division interleaf in the chapter division interleaf information list 52 (step S105), and proceeds to step S106.

  In step S106, based on the image of the n-th sheet read by the scanner unit 13, it is determined whether the n-th sheet is a waste sheet. If it is not a waste paper (step S106; No), the process proceeds to step S109. In the case of waste paper (step S1106; Yes), n is incremented by 1 and a waste mark insertion sheet is output (step S107). That is, the first instruction unit 34 outputs an instruction to output the interleaving paper to the interleaving paper output unit 36, and the interleaving paper output unit 36 that receives the instruction outputs the sheet fed from the paper feed tray 3 as the waste marking interleaving sheet. Paper is discharged. Further, the first instruction unit 34 additionally registers information indicating that the nth sheet is the waste mark interleaf in the waste mark interleaf information list 50 (step S108), and the process proceeds to step S109.

  In step S109, it is determined whether there is a next sheet in this job, and if there is a next sheet (step S109; Yes), n is incremented by 1 (step S110), and the process returns to step S102 and continues processing. Do. If there is no next sheet in this job (step S109; No), this processing ends.

  FIG. 6 shows a first display example of the waste paper identification information. In the operation panel 16, a slip sheet is created by integrating in order of sheet number the rubbed mark interleaf information list 50 read from the dust history information buffer 35 and the chapter divided interleaf information list 52 read from the chapter division information buffer 39. A list 61 is displayed. Since the first sheet of the job is at the bottom of the stacker 14 and the sheets are sequentially stacked thereon, the information on the interleaf is displayed in descending order from the uppermost column in the interleave sheet list 61 following this .

  In the example of FIG. 6, the 20th, 40th, 60th, 80th, 85th, and 100th sheets from the bottom are the interleaf sheets, and of these, the 85th sheet is the filthy mark alignment It is displayed that it is paper. In the interleaf sheet list 61, for each interleaf, the date and time when the interleaf was output, the file name of the job, the sheet number (number of sheets), the number of removed sheets, and the type (chapter division interleaf, waste mark interleaf etc. Is displayed. As described above, both the chapter-dividing interleaf paper and the waste-remark interleaf paper are displayed separately on the interleaf paper list 61.

  In the area next to the left of the interleaf sheet list 61 on the operation panel 16, the stacking condition of the sheets stacked on the stacker 14 is schematically displayed. Also in the sheet type display 63, the chapter division slip sheet and the slippage mark slip sheet are displayed at positions corresponding to the sheet numbers and in a distinguishable manner of the type of slip sheet. In FIG. 6, the chapter division interleaf is displayed in gray, and the dust mark interleaf is hatched. Further, on the right side of each interleaf, the type of the sheet is displayed in characters.

  In this manner, in the interleaving paper list 61 and the sheet type display 63, the information of the interleaving paper of both the chapter dividing interleaving paper and the waste mark interleaving paper is in the stacking order and whether it is the chapter dividing intagi In the actual stacker 14, even if the chaptering interleaf and the waste-mark interleave are the same sheet, the interworking sheet list 61 and the sheet loading type indication 63 are viewed. Thus, it is possible to easily confirm the position of the waste mark interleaf and easily and quickly take out the waste paper from the stacked sheet bundle.

  FIG. 7 shows a second display example of the waste paper identification information. In the column of the number of sheets of the interleaf sheet list 61, the difference between the sheet number of the interleaf sheet and the sheet number of the interleaf sheet immediately below is displayed. The lowermost interleaf sheet indicates the difference from the beginning of the job. The other displays are the same as in FIG. Also in the difference display of FIG. 7, the information of the interleaf of both the chaptering interleave and the dust mark interleaf is displayed in distinguishable manner in the stacking order and whether it is a chapter intercalated paper or a dust mark interleaf Therefore, even in the actual stacker 14, even if the chaptering interposition paper and the waste mark interposition paper are the same sheet, the position of the waste interposition mark paper is easy by looking at the interleaf sheet list 61 and the schematic display 63 of sheet stacking. As a result, it is possible to easily and quickly remove the waste paper from the stack of stacked paper sheets.

  FIG. 8 shows a display example according to the second display method. Only the information on the waste mark paper is displayed on the paper sheet list 61. Similarly, also in the sheet type display 63, only the slip mark paper is displayed as the paper, and the normal paper such as the chapter paper is not displayed. The user can arbitrarily switch between the first display method shown in FIG. 6, FIG. 7, etc. (normally, the display method for displaying the information of the interleaf of both the interleaf and the slip mark interleaf) and the second display. Can.

  FIG. 9 is a view showing a display example of the waste paper identification information in the case where a large number of output sheets of the job are generated and a large amount of slip sheets are generated. In the figure, since the chaptering slip is inserted every 20 sheets in a job of 1000 sheets, the number of chaptering slips alone is 50. In the interleaving paper list 61 of FIG. 9, only the information on the eight interleaving papers from the top in the stacking order is displayed. Page transition buttons 65 and 66 are provided at the lower left of the screen in order to move the portion displayed in the interleaf sheet list 61 in the whole.

  When the downward page transition button 66 is operated, the portion displayed in the interleaf list 61 moves downward by one page in the stacking order, and when the upward page transition button 65 is operated, the portion displayed in the interleaf list 61 is displayed. Move one page upwards in the loading order. In the display page display field 67, the total number of pages and the currently displayed page number are displayed. The display content of the sheet stacking type display 63 also changes corresponding to the portion displayed in the interleaf sheet list 61. The movement of the display position is not limited to the page unit, and may be, for example, one line unit of the list.

  A column of order is provided in the interleaving paper list 61 of FIG. 9, and with regard to the rubbed mark interleaf, the rubbed mark intercalated paper is counted from the top of the stacking order in the entire interleaf, and what number Information (order) is displayed indicating whether it is paper and the number of the interleaf, counting from the bottom. In the example of FIG. 9, it is displayed that the rubbish slippage at the position of the 985th sheet is the second slippage counted from the top, and the 50th slippage counted from the bottom. As a result, even if information of only a part of the interleaving paper in the entire interleaving paper is displayed on the interleaving paper list 61 or the schematic display 63 of the sheet loading, the position of the slip mark in the entire interleaving paper can be easily set. It can be recognized.

  In addition to displaying both the display from the bottom and display from the top, either one or the other may be displayed. The user may select whether to display from the top or from the bottom, or automatically select the closer one (closer in sheet number or closer in rank) according to the position of the slip mark interleaf You may do so.

  FIG. 10 is a flow chart showing processing relating to the display of the waste paper identification information. First, it is determined whether the instructed display method is the first display method or the second display method (step S201). If it is the first display method (step S201; Yes), the chapter division interleaf information list 52 is read out from the chapter division information buffer 39 (step S202), and further, the backout mark interleaf information list 50 is read out from the backout history information buffer 35 (Step S203) The process proceeds to step S204. If the second display method is instructed (step S201; No), the file is inserted from the file history record buffer 35 (step S204), and the process proceeds to step S205. In this case, the chapter divided slip sheet information list 52 may not be read.

  In step S205, after the type information of the interleaving paper is added to the read out information of each interleaving paper, the information is arranged and integrated in order of sheet number. In addition, when it transfers to step S205 from step S204, there is no need of integration.

  Next, it is determined whether the display method instructed by the user is differential display (step S206). In the case of difference display (step S206; Yes), each sheet number in the integrated data is converted to a difference from the sheet number of the immediately preceding slip sheet (step S207). Thereafter, the process proceeds to step S208. If not differential display (step S206; No), the process proceeds to step S208 without performing differential conversion.

  In step S208, display data of the interleaving paper list 61 and the sheet stacking type display 63 is created based on the integrated data, transferred to the display unit of the operation panel 16, and displayed. This processing ends.

  The embodiment of the present invention has been described above with reference to the drawings, but the specific configuration is not limited to that shown in the embodiment, and changes and additions may be made without departing from the scope of the present invention. Also included in the present invention.

  In the embodiment, the example in which only the paper feed trays 1 to 3 are used as the paper feed tray 12 is shown, but even if there are more paper feed trays, there are not enough paper feed trays available for the job. The present invention is suitable in the case where the normal interleaf such as the chapter division interleaf and the filth mark interleaf are used in common on the same sheet.

  The delivery destination is not limited to the stacker 14 and may be a delivery tray. The image forming apparatus of the present invention may be configured not to include a stacker, and may be used by connecting a separate stacker.

DESCRIPTION OF SYMBOLS 10 ... Image forming apparatus 11 ... Body part 12 ... Paper feed tray 13 ... Scanner part 14 ... Stacker 15 ... Image formation part 16 ... Operation panel 21 ... Front image reading sensor 22 ... Back image reading sensor 23 ... Image transmission part 31 ... image reception unit 32 ... read image buffer 33 ... poor image judgment unit 34 ... first instruction unit 35 ... omission history information buffer 36 ... interleaf sheet output unit 37 ... job control unit 38 ... second instruction unit 39 ... chapter divided information buffer 41 ... waste paper information display control part 42 ... switching part 50 ... waste mark interleaf information list 52 ... chapter division interleaf paper information list 61 ... interleaf sheet list 63 ... schematic display of sheet stacking 65 ... page transition button (upper)
66 ... Page transition button (bottom)
67 ... display page display field

Claims (5)

An image forming unit that forms and discharges an image on a fed sheet;
A waste detection unit that detects whether the sheet discharged from the image forming unit is a waste paper;
An interleaf output unit configured to output, as interleaf, a sheet fed from one paper feed tray to a stacker of sheets discharged from the image forming unit;
A first instruction unit that instructs the interleaving paper output unit to output the interleaving paper for the incising paper extraction when the ineffective paper detection is detected by the inelasticity detection unit;
A first storage unit that stores the stacking order of the slip sheet for waste paper extraction, which is output according to the instruction of the first instruction unit, in the stacker;
A second instruction unit that instructs the interleaving paper output unit to output a normal interleaving paper that is an interleaving paper other than for waste paper extraction;
A second storage unit that stores the stacking order of the normal interleaf in the stacker output by the instruction of the second instruction unit;
The stacker is stacked on the stacker based on the information on the stacking order of the slip sheet for waste paper extraction stored in the first storage unit and the information on the stacking order of the normal slip stored in the second storage unit. A display control unit for displaying on a display unit the position of the insertion paper for waste paper extraction in the insertion paper for both the insertion paper for waste paper extraction and the normal insertion paper;
An image forming apparatus comprising: The display control unit displays the position of each interleaving paper stacked on the stacker as a method of displaying the position of the interleaving paper for the waste paper extraction in the both interleaving papers. The image forming apparatus according to claim 1, wherein the image forming apparatus is configured to distinguish and normally display an interleaf. The image forming apparatus according to claim 2, wherein the display control unit displays the number of stacked sheets from one slip sheet to a next slip sheet. The display control unit displays, as a method of displaying the position of the slip sheet for removing the scrap paper among the both slip sheets, both the slip sheet for scraping paper being stacked on the stacker and the normal slip sheet. The image forming apparatus according to claim 1, wherein the order of insertion sheets for waste paper extraction in the insertion sheets is displayed. The display control method of the position of the interleaf sheet for waste paper extraction by the display control unit, a first display method for displaying the position of the interleaf sheet for waste paper extraction among the both interleaf sheets, and the first storage unit A switching unit for switching to a second display method of displaying only the position of the insertion sheet for waste paper extraction based on the information on the stacking order of the insertion paper for waste paper extraction stored in the An image forming apparatus according to any one of Items 1 to 4.