JP2010224305A - Image forming system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming system which can reduce wasted paper or sheets. <P>SOLUTION: A paper transporting control section supplies the paper from an interposer 240 which is the paper that is positioned in a standby position to a first transporting path R1 and, at the same time, transports the paper along the first transporting path R1 and then ejects the paper to a second paper loading section 222 (outside of paper processing unit 200) which is a paper loading section which is different from the first paper loading section 235 when the paper in the tail end among the preceding paper is positioned in an image forming unit 100 and not all the preceding paper can be ejected. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an image forming system for forming an image on a sheet.

There has been proposed an image forming unit that can effectively use the recording paper remaining in the conveyance path when a jam occurs and can adjust the discharge order (see, for example, Patent Document 1).
In this image forming unit, after the jammed paper is removed, the recording paper remaining in the conveyance path is retracted to the intermediate tray. The printed recording paper preceding the jam-causing paper is output to the discharge tray. At the time of restarting, the recording paper for the jammed paper that has been removed is pulled out from the paper feed tray. Then, along with the recording sheet retracted to the intermediate tray, it is guided to the transfer device. In the transfer device, printing is performed only on unprinted recording paper, and other recording paper is allowed to pass.

  In addition, a recording apparatus that can determine a sheet that can be reused for the next image recording among the sheets remaining in the apparatus due to the interruption of the conveyance due to a jam or the like, and reduce wasteful consumption of the sheet is proposed. (See Patent Document 2). In this recording apparatus, the conveyance information of each sheet being conveyed is checked by a sensor or the like and is sequentially stored in a memory. When the conveyance is interrupted, it is determined whether or not the sheet is reusable based on the conveyance information. If the sheet is reusable, it is used for the next recording.

Japanese Patent Laid-Open No. 9-258516 JP-A-10-129889

By the way, when a sheet is inserted between sheets of paper that are sequentially conveyed, if a conveyance failure such as a jam occurs in the sheet, a situation in which the sheet cannot be inserted between the sheets occurs.
In this case, the paper and the sheet can be reused once the paper and the sheet are discharged out of the apparatus after removing the paper causing the conveyance failure. Here, the discharged paper often includes not only paper on which an image is formed but also paper on which an image is formed. In this case, it is possible to reuse the paper by sorting the paper on which no image is formed. However, since this sorting takes time, the paper and the sheet are eventually discarded without being reused. Often.
If the sheet cannot be inserted between the sheets as described above, the sheet can be inserted between the sheets by waiting for the sheet until the cause of the conveyance failure is resolved and the sheet is conveyed again. . However, if the sheet waits in a curved state or the like, the sheet warps. As a result, also in this case, the possibility that the sheet is discarded increases.
It is an object of the present invention to provide an image forming system that can reduce wasted paper and sheets.

The invention according to claim 1 includes an image forming unit that forms an image on a sheet to be transported, and a transport path connected to the image forming unit, and sequentially transports the paper along the transport path. A supply unit that sequentially supplies the image forming unit to the image forming unit, a transport unit that sequentially transports the paper transported from the image forming unit along a transport path, and a sheet fed from the sheet stacking unit. Supply means for supplying the paper to the transport path so as to follow the paper that is transported through the transport path and on which a predetermined image is formed, and paper transport failure has occurred in the image forming unit. A stop means for stopping conveyance of the paper in the image forming unit and the supply unit, and after the paper is removed from the image forming unit Resuming means for resuming the conveyance of the paper in the image forming unit and the supply unit; and when the stop is stopped by the stopping means, the repositioning unit is located on the conveyance path of the supply unit and the resuming means resumes the image A first processing unit that forms an image on the sheet conveyed to the forming unit by the image forming unit; and the sheet on which the predetermined image is formed is conveyed to the conveying unit by the restart by the resuming unit. In this case, the image forming system includes: a second processing unit that operates the supply unit and supplies the sheet sent from the sheet stacking unit to the conveyance path.
According to a second aspect of the present invention, when the paper on which the predetermined image is formed is positioned downstream of the image forming unit in the paper transport direction when the stop is stopped by the stop unit. The image forming system according to claim 1, further comprising a third processing unit that operates the supply unit to supply the sheet fed from the sheet stacking unit to the conveyance path.
According to a third aspect of the present invention, the first processing unit is formed on the sheet removed from the image forming unit with respect to the sheet sequentially conveyed to the image forming unit by the restart. 3. The image forming system according to claim 1, wherein an image is formed and an image that is to be formed on the removed paper is formed.

According to a fourth aspect of the present invention, an image forming unit that forms an image on a sheet to be transported and a transport path connected to the image forming unit, the sheets are sequentially transported along the transport path. A supply unit that sequentially supplies the image forming unit to the image forming unit, and a sheet transported from the image forming unit is transported sequentially along the transport path and stacked on the paper stacking unit, and a branch transport path branched from the transport path is provided. A transport unit capable of stacking sheets in the transport path on a sheet stacking unit different from the sheet stacking unit, and a sheet fed from the sheet stacking unit as a sheet transported through the transport path of the transport unit. Supply means for supplying the sheet to the conveyance path so as to follow the sheet on which the predetermined image is formed, and sheet conveyance failure in the image forming unit. A stop means for stopping the conveyance of the paper in the image forming unit and the supply unit, and the conveyance of the paper in the image forming unit and the supply unit is resumed after the paper is removed from the image forming unit. An image forming system including: a sheet conveying unit configured to convey a sheet located on the conveying path of the supply unit to the different sheet stacking unit in the conveying unit when the stop is performed by the stopping unit. is there.
According to a fifth aspect of the present invention, the supply unit includes a paper storage unit that stores paper, and sequentially transports the paper fed from the paper storage unit along the transport path, and the paper transport unit. 5. The image forming system according to claim 4, further comprising notification means for notifying a user of re-accommodation of the sheets conveyed by the above and loaded on the different sheet stacking sections into the sheet storage section.
According to a sixth aspect of the present invention, when the sheet on which the predetermined image is formed by the stop by the stop unit is not transported to the transport unit, the supply unit is operated to be sent out from the sheet stacking unit. The image forming system according to claim 4, further comprising a discharge unit that supplies the sheet to the transport path of the transport unit and discharges the supplied sheet to the outside of the transport unit. It is.

The invention according to claim 7 includes an image forming unit that forms an image on a sheet to be transported, and a transport path connected to the image forming unit, and sequentially transports the paper along the transport path. A supply unit that sequentially supplies the image forming unit to the image forming unit, and a sheet that has been transported from the image forming unit is sequentially transported along the transport path and stacked on the first paper stacking unit, and the branch branched from the transport path A transport unit having a transport path and capable of stacking sheets in the transport path on the second sheet stacking unit; and a sheet transported from the sheet stacking unit on the transport path of the transport unit. When a paper conveyance failure occurs in the image forming unit and a supply unit that supplies the conveyance path so as to follow a paper on which a predetermined image is formed Stop means for stopping the conveyance of the paper in the image forming unit and the supply unit, and the supply when the paper on which the predetermined image is formed by the stop by the stop means is not conveyed to the conveyance unit. An image forming system including: a sheet conveying unit configured to operate the unit and supply the sheet fed from the sheet stacking unit to the transport path and transport the supplied sheet to the second sheet stacking unit.
According to an eighth aspect of the present invention, when the sheet is removed from the image forming unit, a restarting unit that restarts conveyance of the sheet in the image forming unit and the supply unit, and when the stop is performed by the stopping unit. The image forming unit further includes an image forming unit that forms an image by the image forming unit on the sheet that is positioned on the transport path of the supply unit and that has been transported to the image forming unit by the restart by the restarting unit. The image forming system according to claim 7.
According to a ninth aspect of the present invention, when the sheet is removed from the image forming unit, a restarting unit that restarts conveyance of the sheet in the image forming unit and the supply unit, and when the stop is performed by the stopping unit. Paper transporting means for transporting paper that is located on the transport path of the supply unit and transported by the restarting means by the restarting means to a third paper stacking section provided in the transporting unit. The image forming system according to claim 7, wherein the system is an image forming system.
According to a tenth aspect of the present invention, when the sheet conveying unit does not convey the sheet on which the predetermined image is formed by the stopping by the stopping unit to the conveying unit and receives an instruction from a user. The image forming system according to claim 7, wherein the sheet fed from the sheet stacking unit is transported to the second sheet stacking unit.
According to an eleventh aspect of the present invention, the sheet sent out from the sheet stacking unit temporarily stands by at a predetermined position, and the sheet conveying means is predetermined after the standby of the sheet is started. 10. The image forming system according to claim 7, wherein the waiting sheet is conveyed to the second sheet stacking unit after a lapse of time.
The invention according to a twelfth aspect of the present invention further comprises notification means for notifying a user to reload the sheets conveyed to the second sheet stacking unit onto the sheet stacking unit. The image forming system according to any one of Items 11 to 11.
The invention according to claim 13 further comprises grasping means for grasping the type of the sheet, and the sheet conveying means removes the sheet from the second sheet stacking unit when the sheet is one kind of sheet. 13. The image forming system according to claim 7, wherein when the sheet is another type of sheet, the sheet is not conveyed to the second sheet stacking unit. is there.

According to claim 1 of the present invention, it is possible to reduce waste of paper and sheets as compared with the case where the present invention is not adopted.
According to the second aspect of the present invention, for example, it is possible to suppress the warp or the like generated in the sheet as compared with the case where the sheet is supplied after the conveyance of the sheet in the image forming unit and the supply unit is resumed.
According to the third aspect of the present invention, for example, it is possible to prevent page missing in a bundle of sheets stacked in the order of pages.

According to the fourth aspect of the present invention, it is possible to reduce paper waste as compared with the case where the present invention is not adopted.
According to the fifth aspect of the present invention, compared with the case where the present invention is not adopted, the possibility that the sheets stacked on the different sheet stacking sections are re-accommodated in the sheet accommodating section increases.
According to the sixth aspect of the present invention, it is possible to suppress the warp or the like generated on the sheet as compared with the case where the sheet is kept waiting until the sheet on which the predetermined image is formed is conveyed.

According to the seventh aspect of the present invention, it is possible to reduce the waste of sheets as compared with the case where the present invention is not adopted.
According to the eighth aspect of the present invention, it is possible to reduce paper waste as compared with the case where the present invention is not adopted.
According to the ninth aspect of the present invention, it is possible to reduce paper waste as compared with the case where the present invention is not adopted.
According to the tenth aspect of the present invention, it is easier for the user to recognize that the sheet is conveyed to the second paper stacking unit than when the present invention is not adopted.
According to the eleventh aspect of the present invention, the convenience for the user can be improved as compared with the case where the sheets are uniformly conveyed to the second sheet stacking unit.
According to the twelfth aspect of the present invention, the possibility that the sheets stacked on the second sheet stacking unit will be stacked again on the sheet stacking unit increases.
According to the thirteenth aspect of the present invention, for example, a sheet that is less likely to warp can be kept on standby.

1 is a diagram illustrating a configuration of an image forming system to which the exemplary embodiment is applied. It is a figure for demonstrating the process performed in an image forming system. It is a block diagram which shows each structure of a whole control part. It is the flowchart which showed the process which a whole control part performs. It is a figure for demonstrating the process which a whole control part performs. It is a figure for demonstrating the process which a whole control part performs. It is a figure for demonstrating the process when a jam generate | occur | produces in the preceding paper side. It is the flowchart which showed the process which a whole control part performs. It is a figure for demonstrating the process which a whole control part performs. It is the flowchart which showed the process which a whole control part performs. It is the flowchart which showed the process which a whole control part performs.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 1 is a diagram illustrating a configuration of an image forming system to which the exemplary embodiment is applied.
The image forming system 1 according to the present embodiment sequentially conveys an image forming unit 100 that forms an image on a sheet, a sheet on which an image is formed by the image forming unit 100, and performs a predetermined process on the sheet. A sheet processing unit 200 and a sheet supply unit (supply unit) 300 that supplies sheets to the image forming unit 100 are provided. Note that the paper processing unit 200 in the present embodiment can also be regarded as a transport unit that sequentially transports the paper transported from the image forming unit 100.

  The image forming system 1 includes a display panel, and includes a UI (User Interface) 400 that receives information from the user and displays the information to the user. The UI 400 is provided in the image forming unit 100. In the image forming system 1, a first transport path R <b> 1 is provided from the paper supply unit 300 to the paper processing unit 200. In addition, a plurality of transport rolls 500 are provided along the first transport path R1, the second transport path R2, which will be described later, and the like, which transport sheets, a cover, which will be described later, and the like. Further, a plurality of sheet detection sensors S2 are provided along the first transport path R1 and a second transport path R2 to be described later, and detect paper transported through the first transport path R1 and the second transport path R2. Yes.

  The image forming unit 100 includes an image forming unit 110 that forms an image on a sheet. Further, the image forming unit 100 includes an overall control unit 120. The overall control unit 120 controls each unit and each device of the image forming unit 100. The overall control unit 120 is connected to the paper supply unit 300 and the paper processing unit 200 via the paper supply control unit 360 provided in the paper supply unit 300 and the paper processing control device 250 provided in the paper processing unit 200. To control.

  Here, the overall control unit 120 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The CPU executes processing while exchanging data with the RAM in accordance with a program stored in the ROM or the like, thereby realizing a function described later. Further, the image forming unit 100 includes an image processing unit 130 that is connected to the image reading device 2 and the personal computer (PC) 3 and performs image processing on image data received therefrom. Here, the image processing unit 130 has a buffer constituted by a magnetic disk device or the like, and can store image data. The image data that has been subjected to image processing by the image processing unit 130 is output to the image forming unit 110.

  Here, the image forming unit 110 can form an image on a sheet based on, for example, an electrophotographic method. In this electrophotographic system, a toner image is formed on an image carrier such as a photosensitive drum or an intermediate transfer member through charging, exposure, and development processes. The toner image is transferred to the paper by the transfer device and fixed to the paper by the fixing device.

  The paper processing unit 200 is formed by a plurality of units. Specifically, the sheet processing unit 200 includes a transport unit 210 that conveys the sheet conveyed from the image forming unit 100 further downstream. The paper processing unit 200 includes a folding unit 220 that performs an inner trifold (C fold) and an outer trifold (Z fold) on the paper conveyed from the transport unit 210. Further, a finisher (finisher unit) 230 that performs final processing on the paper that has passed through the folding unit 220 is provided.

  In addition, the paper processing unit 200 includes an interposer 240 that supplies paper (sheets) such as a front cover, a back cover, and an insertion sheet used when forming a booklet. The paper processing unit 200 includes a paper processing control device 250 that controls each unit and each unit provided in the paper processing unit 200. In this embodiment, the sheet processing control device 250 is provided in the finisher 230, but may be provided in another unit.

  Here, the finisher 230 is provided with a stapling function unit 231 for performing stapling processing on a sheet. Further, although not shown, a saddle stitching function unit that performs saddle stitching and binding a bundle of sheets and a punch function unit that punches (punches) 2 holes or 4 holes are provided. The finisher 230 includes a first sheet stacking unit 235 on which sheets conveyed via the first conveyance path R1 and sheets (sheet bundle) subjected to stapling processing by the staple function unit 231 are stacked. Is provided.

  The folding unit 220 includes a folding function unit 221 that performs an inner three-fold (C-fold) and an outer three-fold (Z-fold) on the paper. Further, the folding unit 220 is provided with a first branch conveyance path B1 that is branched from the first conveyance path R1. Further, the folding unit 220 is provided with a second paper stacking section 222 for stacking the paper transported via the first branch transport path B1. Further, the folding unit 220 is provided with a gate 223 for switching the paper transport destination to the first transport path R1 or the first branch transport path B1, and a drive source (not shown) such as a solenoid for driving the gate 223. ing.

  The finisher 230 is also provided with a second branch transport path B2 that is branched from the first transport path R1. Further, a third paper stacking unit 232 for stacking paper transported via the second branch transport path B2 is provided. Furthermore, a drive source (not shown) such as a solenoid for driving the gate 233 and the gate 233 for switching the paper transport destination to the first transport path R1 or the second branch transport path B2 is provided.

  Here, the stapling function unit 231 in the finisher 230 will be described in detail. The stapling function unit 231 accumulates sheets conveyed via the first conveying path R1 and forms a single sheet bundle 231A. It has. The staple function unit 231 includes a staple head 231B that performs a staple process on a sheet bundle in the compilation tray 231A. Although not shown in the drawings, a discharge roll for discharging the paper subjected to the staple processing by the staple head 231B to the first paper stacking unit 235 is provided.

  The interposer 240 includes a plurality of stacking units on which sheets (sheets) such as a front cover, a back cover, and an insertion sheet are stacked. More specifically, the interposer 240 according to the present embodiment includes three stacking units (sheet stacking units) including a first stacking unit 241, a second stacking unit 242, and a third stacking unit 243.

Further, the interposer 240 is provided corresponding to each of the first stacking unit 241 to the third stacking unit 243, and a first feed roll 244 and a second send-out for feeding a stacked cover sheet or the like to a second transport path R2 described later. A roll 245 and a third delivery roll 246 are provided. Note that the transport path from the first stacking unit 241 to the third stacking unit 243 toward the second transport path R2 intersects the second transport path R2. In other words, the transport path from the first stacking unit 241 to the third stacking unit 243 toward the first transport path R1 is bent.
The interposer 240 is provided corresponding to each of the first stacking unit 241 to the third stacking unit 243, and detects the size of a cover sheet or the like stacked on the first stacking unit 241 to the third stacking unit 243. A detection sensor Y is provided.

  Here, the cover and the like delivered by the first delivery roll 244 to the third delivery roll 246 pass through the interposer 240 and the second transport route R2 provided in the transport unit 210 to the first transport route R1. Sent out. In other words, a merging position (merging portion) where a cover sheet from the interposer 240 merges with the first transport path R1 is provided in the transport unit 210. Here, the front cover or the like from the interposer 240 functions as one of the supply means so as to follow the paper that is transported through the first transport path R1 and on which a predetermined image is formed. The paper is supplied to the first transport path R1 by the transport roll 500 (details will be described later).

  Although not described above, the transport unit 210 is provided with a sensor that detects the overlap when a plurality of front covers and the like are conveyed from the interposer 240 in an overlapping state. In other words, the transport unit 210 is provided with a double feed detection sensor S1 for detecting double feed of a front cover or the like.

On the other hand, the paper supply unit 300 includes a first paper supply unit 310 arranged on the upstream side in the paper conveyance direction and a second paper supply unit 320 arranged on the downstream side in the paper conveyance direction.
Here, the first paper supply unit 310 and the second paper supply unit 320 are configured similarly, and each of the first paper supply unit 310 and the second paper supply unit 320 includes a paper storage unit 340 that stores paper, A delivery roll 350 for delivering the paper stored in the paper storage unit 340 to the first transport path R1 is provided. Each of the first paper supply unit 310 and the second paper supply unit 320 includes a paper supply control unit 360.

  Although not described above, a drive motor (not shown) that drives the transport roll 500 includes a first paper supply unit 310, a second paper supply unit 320, an image forming unit 100, a transport unit 210, and a folding unit. 220 and the finisher 230 are individually provided. In other words, in the image forming system 1 according to the present embodiment, the transport roll 500 can be driven and stopped for each unit.

Here, an example of processing executed in the image forming system 1 will be described with reference to FIG.
FIG. 2 is a diagram for explaining processing executed in the image forming system 1. In this process, a case where a sheet from the interposer 240 is inserted between sheets of images on which an image is formed will be described as an example.

  In the image forming system 1 according to the present exemplary embodiment, first, conveyance of a sheet is started from the sheet supply unit 300. At this time, a gap corresponding to the size of the sheet from the interposer 240 is provided between the sheets to be conveyed so that the sheet from the interposer 240 can be inserted. Hereinafter, in this specification, this gap is referred to as an “insertion gap”, and a sheet located downstream in the transport direction from the insertion gap is referred to as “preceding paper”, and upstream in the transport direction from the insertion gap. The paper located in the position may be referred to as “following paper”.

  Further, in the image forming unit 100, image formation is performed on sequentially conveyed sheets. More specifically, a toner image is first formed on an image carrier such as a photosensitive drum or an intermediate transfer member through charging, exposure, and development processes. Then, this toner image is transferred onto a sheet by a transfer device. Thereafter, the toner image is fixed on the paper by a fixing device.

Next, the sheet on which the image has been formed is stacked on the first sheet stacking unit 235 via the transport unit 210, the folding unit 220, and the finisher 230, for example. Further, when the insertion gap reaches the joining position, the sheet from the interposer 240 is supplied to the first transport path R1. As a result, a plurality of sheets on which sheets from the interposer 240 are inserted and images are formed are stacked on the first sheet stacking unit 235.
In the present embodiment, the paper is supplied from the interposer 240 before the timing when the insertion gap reaches the joining position. The sheet is waiting at a predetermined standby position that is a position before the merge position. When the insertion gap reaches the joining position, the insertion gap is inserted into the insertion gap.

Here, FIG. 3 is a block diagram showing each configuration of the overall control unit 120.
As shown in the figure, the overall control unit 120 includes a paper management unit 120A, a paper transport control unit 120B, a UI control unit 120C, and an image formation control unit 120D.

The sheet management unit 120A grasps the position of each sheet conveyed by the image forming system 1 based on the control signal transmitted from the sheet conveyance control unit 120B and the output from the sheet detection sensor S2. Further, the sheet management unit 120A determines whether or not a jam (conveyance failure) has occurred in the conveyed sheet based on the output from the sheet detection sensor S2.
The sheet conveyance control unit 120B controls a drive motor (not shown) that drives the conveyance roll 500 and the like, and controls conveyance of the sheet in the image forming system 1. In other words, the drive motor provided in each unit is individually controlled, and the conveyance of the paper is controlled for each unit.
The image formation control unit 120D controls the output of image data from the image processing unit 130 to the image forming unit 110. Further, the image forming unit 110 is controlled to control image formation on the paper.
The UI control unit 120C performs display control in the UI 400. In addition, information from the user input on the UI 400 is received.

Next, processing when a jam (paper jam, conveyance failure) occurs in the image forming system 1 according to the present embodiment will be described.
FIG. 4 is a flowchart illustrating processing executed by the overall control unit 120.
After the paper transport control unit 120B starts transporting paper based on pressing of a start button (not shown), the paper management unit 120A determines whether or not a jam has occurred based on the output from the paper detection sensor S2 ( Step 101). Here, the paper management unit 120A can determine that a jam has occurred when a predetermined output is not output from the paper detection sensor S2 at a predetermined timing. If it is determined that no jam has occurred, the process of step 101 is repeated.

  When the paper management unit 120A determines that a jam has occurred, the paper management unit 120A grasps a unit in which a jam has occurred (hereinafter, may be referred to as a “jamming unit”) based on the output from the paper detection sensor S2. Then, the sheet management unit 120A determines whether or not the jam generation unit is a unit located on the downstream side of the image forming unit 100 (step 102). When the paper management unit 120A determines that the jam generation unit is a unit located on the downstream side of the image forming unit 100 (for example, when a jam occurs in the folding unit 220), the paper conveyance control unit 120B. However, the driving of the transport roll 500 (see FIG. 1) is stopped, and the transport of the paper is stopped (step 108).

  Thereafter, the UI control unit 120C controls the UI 400 to notify the user that the sheet needs to be removed from the jam generation unit (step 109). When the paper management unit 120A detects that the paper is removed and the start button (not shown) is pressed, the paper transport control unit 120B executes a purge process (paper transport process), and the interposer The paper including the paper from 240 (paper at the standby position) is discharged out of the apparatus (step 110). Thereafter, the paper conveyance control unit 120B and the image formation control unit 120D resume paper conveyance and image formation (step 111). It should be noted that the paper can be reused by selecting the paper on which no image is formed from the paper discharged by the purge process. By the way, since this sorting operation requires labor, paper is often not reused.

  On the other hand, if it is determined in step 102 that the jam generation unit is not a unit located downstream of the image forming unit, the sheet conveyance control unit 120B functioning as one of the stopping means The conveyance of the paper in the unit located upstream from the jam generation unit is stopped (step 103). For example, when a jam occurs in the image forming unit 100, the driving of the conveyance roll 500 in the image forming unit 100, the first paper supply unit 310, and the second paper supply unit 320 is stopped, and the conveyance of the paper in these units is stopped. Stop.

  Note that the sheet conveyance control unit 120B continues to convey the sheet in the unit located downstream of the jam generation unit, and conveys these sheets to, for example, the first sheet stacking unit 235. Accordingly, for example, when a jam occurs in the image forming unit 100, the transport of the paper in the transport unit 210, the folding unit 220, and the finisher 230 is continued, and the paper in these units is stacked on the first paper stacking unit 235. Is done.

  Thereafter, the sheet conveyance control unit 120B determines whether or not all the preceding sheets can be discharged (step 104). Here, the processing in step 104 will be described in detail. First, the sheet conveyance control unit 120B grasps the position of the last sheet (the most upstream side in the sheet conveyance direction) of the preceding sheet. Then, it is determined whether or not the last sheet is located in a unit downstream of the jam generating unit (downstream in the sheet conveyance direction). If the last sheet is located in the downstream unit, it is determined that all the preceding sheets can be discharged. On the other hand, if the last sheet is not located in the downstream unit, that is, if it is located in the jam generation unit or a unit upstream from the jam generation unit, all the preceding sheets cannot be discharged. to decide.

  When the sheet conveyance control unit 120B functioning as the third processing unit determines that all the preceding sheets can be discharged in step 104, the sheet is the sheet from the interposer 240 and is waiting at the standby position. Is supplied to the first transport path R1 (step 105), and the paper is transported to the first paper stacking unit 235. In other words, after the last paper in the preceding paper passes through the merge position, the paper from the interposer 240 is supplied to the first transport path R1, and this paper is further transported to the first paper stacking unit 235. As a result, all the preceding sheets and sheets from the interposer 240 are stacked on the first sheet stacking unit 235.

  Thereafter, the UI control unit 120C notifies the user that it is necessary to remove the paper in the jam generation unit via the UI 400 (step 106). In this step 106, it is notified that not only jammed paper but also paper other than jammed paper needs to be removed (the same applies to step 112 described later). Thereafter, the sheet conveyance control unit 120B and the image formation control unit 120D functioning as a restarting unit perform sheet conveyance and image formation when all sheets are removed from the jam generation unit and a start button (not shown) is pressed. Is resumed (step 107).

  Note that the reason for notifying that it is necessary to remove paper other than jammed paper in step 106 is as follows. When the jam paper is removed, the cover (not shown) of the jam generating unit is generally opened and the internal mechanism is operated by the user. At this time, if the user is only the jam paper, In some cases, paper other than jammed paper may be touched. In this case, the paper other than the jammed paper may be damaged or bent. In this embodiment, the paper is reused by carrying it again (details will be described later), but if the paper is carried again with only the jammed paper removed, the first paper stacking unit The sheet loaded on the 235 or the like includes a sheet having a scratch or a bend. For this reason, in this embodiment, as described above, all the sheets in the jam generation unit are removed. Note that the units other than the jam generating unit are configured by separate housings (units), and there is little possibility that the internal paper is touched by the user.

  Here, in step 107, the driving of the transport roll 500 is restarted, and the transport of the paper stopped on the first transport path R1 in the first paper supply unit 310 and the second paper supply unit 320 is restarted. A new sheet is supplied from the sheet storage unit 340. The image forming control unit 120D functioning as the first processing unit and the image forming unit controls the image forming unit 110 and the image processing unit 130, and is formed on the removed sheet with respect to the conveyed sheet. The image that has been formed and the image that was to be formed on the removed paper are sequentially formed.

  On the other hand, if it is not determined in step 104 that all of the preceding sheets can be discharged, the UI control unit 120C notifies via the UI 400 that it is necessary to remove the sheet in the jam generation unit, as described above. (Step 112).

  Here, if it is not determined in step 104 that all of the preceding sheets can be discharged, the insertion gap for inserting the sheet from the interposer 240 will not reach the junction. That is, the sheet from the interposer 240 cannot be supplied to the first transport path R1. More specifically, although the paper from the interposer 240 can be supplied to the first transport path R1, it is inserted at a position different from the original position. For this reason, if it is determined in step 104 that all of the preceding papers can be discharged, the paper is not supplied from the interposer 240 as in step 105, and the paper is first removed in the jam generating unit. Notification that it is necessary.

  After that, the sheet conveyance control unit 120B and the image formation control unit 120D resume the sheet conveyance and the image formation when the sheet is removed from the jam generation unit and a start button (not shown) is pressed, as in step 107. (Step 113). As a result, a sheet corresponding to the last sheet (a sheet on which a predetermined image is formed) is conveyed, and the insertion gap also reaches the merging position.

  Next, the sheet conveyance control unit 120B functioning as the second processing unit supplies the sheet from the interposer 240 that has been waiting at the standby position to the first conveyance path R1 (step 114). In other words, the sheet from the interposer 240 is supplied to the first transport path R1 when the insertion gap reaches the joining position. Thereby, for example, all of the preceding paper, the paper from the interposer 240, and the subsequent paper are stacked on the first paper stacking unit 235.

  Heretofore, conventionally, for example, when a jam has occurred in the image forming unit 100, the processing shown in the above steps 108 to 111 has been generally performed. That is, when a jam occurs in the image forming unit 100, first, the conveyance of the paper in the image forming system 1 is stopped. Next, after allowing the user to remove the sheet, a purge process is performed, and the sheet located inside the apparatus including the sheet from the interposer 240 is discharged out of the apparatus. Thereafter, paper conveyance and image formation are resumed. Here, in this case, the paper can be reused by selecting the paper on which no image is formed. By the way, since this sorting operation requires labor, these sheets are often not reused. That is, it is often discarded without being reused.

  On the other hand, in the processing according to the present embodiment, when a jam occurs in the image forming unit 100 or a unit upstream of the image forming unit 100, first, for example, the first sheet is positioned on the downstream side of the jam generating unit. The paper is discharged to the paper stacking unit 235. Here, an image is formed on all of the discharged sheets. Thereafter, after the paper in the jam generating unit is removed, the paper is re-conveyed. However, all the re-conveyed paper passes through the image forming unit 100, and image formation is performed in the image forming unit 100. The Then, after the image is formed, the image is discharged to, for example, the first paper stacking unit 235.

  Further, in this process, the paper from the interposer 240 is inserted into the insertion gap, and then the paper is discharged out of the apparatus. As a result, all the sheets stacked on the first sheet stacking unit 235 have an image formed thereon. Further, the sheet from the interposer 240 is inserted into the sheet stacked on the first sheet stacking unit 235. For this reason, in the processing according to the present embodiment, the above-described sorting is not necessary, and the disposal of paper is suppressed.

Next, a specific example of the above process will be described with reference to FIGS.
5 and 6 are diagrams for explaining the process executed by the overall control unit 120. FIG. In more detail, it is a figure for demonstrating the process after the said step 102. FIG.

  For example, as shown in FIG. 5A, when a jam occurs in the image forming unit 100, whether or not the jam generating unit is a unit located on the downstream side of the image forming unit 100 in step 102. Will be judged. In the example shown in FIG. 5A, since a jam has occurred in the image forming unit 100, it is determined that the jam generating unit is not a unit located on the downstream side of the image forming unit 100.

  For this reason, the processing in step 103 is executed, and the paper in the image forming unit 100 that is a jam generation unit and the first paper supply unit 310 and the second paper supply unit 320 that are units upstream of the jam generation unit 100 is performed. Is stopped. As described above, the conveyance of the paper in the transport unit 210, the folding unit 220, and the finisher 230, which are units located on the downstream side of the jam generation unit, is continued, and the paper in these units is shown in FIG. For example, the sheet is discharged to the first sheet stacking unit 235 as shown in FIG.

  Next, the process of step 104 is executed, and it is determined whether or not all the preceding sheets can be discharged. In the example shown in FIG. 5A, since the last sheet of the preceding sheets is located on the downstream side of the image forming unit 100, it is determined that all the preceding sheets can be discharged. Thereafter, the process of step 105 is executed. That is, the sheet from the interposer 240 is supplied to the first transport path R1. As a result, as shown in FIG. 5B, the sheets from the interposer 240 are stacked on the first sheet stacking unit 235.

  Thereafter, the process of step 106 is executed. That is, a notification that the sheet needs to be removed in the image forming apparatus 100 is given. When the sheet is removed and a start button (not shown) is pressed, the process of step 107 is executed. That is, paper conveyance and image formation are resumed. As a result, the conveyance of the sheet (see FIG. 5B) in the first sheet supply unit 310 and the second sheet supply unit 320 is started first, and a new sheet is supplied from the sheet storage unit 340. Further, the image forming unit 100 forms an image on the conveyed paper. As a result, the first paper stacking unit 235 loads the preceding paper on which the image is formed, the paper from the interposer 240, and the subsequent paper on which the image is formed.

  On the other hand, as shown in FIG. 6, when the last sheet of the preceding sheets is located in the image forming unit 100 that is a jam generating unit, it is determined in step 104 that all the preceding sheets cannot be discharged. The In this case, the paper supply from the interposer 240 is postponed, and first, the process of step 112 is executed. That is, a notification that the sheet needs to be removed in the image forming apparatus 100 is given. When the sheet is removed and a start button (not shown) is pressed, the process of step 113 is executed. That is, paper conveyance and image formation are resumed.

  Specifically, the transport of the stopped paper into the first paper supply unit 310 and the second paper supply unit 320 is started, and a new paper from the first paper supply unit 310 and the second paper supply unit 320 is started. Is started. Further, the image forming unit 100 forms an image on the conveyed paper. Further, the image forming unit 100 adjusts the sheet conveyance pitch (conveyance interval), and the insertion gap is formed between the sheets. When the insertion gap reaches the merging position, the sheet from the interposer 240 is supplied to the insertion gap (step 114). As a result, similarly to the above, the first paper stacking unit 235 stacks the preceding paper on which the image is formed, the paper from the interposer 240, and the subsequent paper on which the image is formed.

  In FIG. 6, the processing when the jam occurs on the succeeding paper side has been described. However, as shown in FIG. 7 (the diagram for explaining the processing when the jam occurs on the preceding paper side) Even when a jam occurs on the paper side, the same processing as described above is executed.

  As shown in FIG. 7, in the image forming unit 100, when a jam occurs in the preceding paper, the paper from the interposer 240 cannot be inserted into the insertion gap as described above. In such a case, as described above, it is determined in step 104 that all the preceding sheets cannot be discharged. In this case, the paper supply from the interposer 240 is postponed, and first, the process of step 112 is executed. That is, a notification that the sheet needs to be removed in the image forming unit 100 is given. Then, when the sheet is removed and a start button (not shown) is pressed, the process of step 113 is executed. That is, paper conveyance and image formation are resumed.

  Specifically, the transport of the stopped paper into the first paper supply unit 310 and the second paper supply unit 320 is started, and a new paper from the first paper supply unit 310 and the second paper supply unit 320 is started. Is started. Further, the image forming unit 100 forms an image on the conveyed paper. Further, the image forming unit 100 adjusts the sheet conveyance pitch (conveyance interval), and the insertion gap is formed between the sheets. When the insertion gap reaches the merging position, the sheet from the interposer 240 is supplied to the insertion gap (step 114). As a result, similarly to the above, the first paper stacking unit 235 stacks the preceding paper on which the image is formed, the paper from the interposer 240, and the subsequent paper on which the image is formed.

  In the above description, the paper is stopped in the first paper supply unit 310 and the second paper supply unit 320, and after the paper is removed from the image forming unit 100, an image is formed on the paper. By the way, without forming an image on the paper that has been stopped in the first paper supply unit 310 and the second paper supply unit 320, this paper can be used as, for example, the third paper stacking unit 232 (the first paper stacking unit 235 and the first paper stacking unit 235. Can be discharged (conveyed) to different paper stacking units. In this case, if the paper discharged to the third paper stacking unit 232 is reset (re-contained) in the paper storage unit 340 (see FIG. 1) of the paper supply unit 300, it can be used again. In other words, since the sheets are stacked on a sheet stacking unit different from the first sheet stacking unit 235, the above sorting is not necessary.

It should be noted that the first paper supply unit 310 and the second paper supply unit 320 are discharged after forming an image on the paper that has been stopped in the first paper supply unit 310 and the second paper supply unit 320. It is also possible to select a process for discharging the paper that has been stopped without performing image formation. That is, a configuration that allows selection by the user can also be adopted.
Further, when the paper that has been stopped in the first paper supply unit 310 and the second paper supply unit 320 is discharged to, for example, the third paper stacking unit 232 without performing image formation, It is preferable to notify the UI 400 of prompting the user to reset the loaded paper in the paper storage unit 340.

Further, the overall control unit 120 can execute the following processing.
FIG. 8 is a flowchart showing processing executed by the overall control unit 120. FIG. 9 is a diagram for explaining processing executed by the overall control unit 120. Note that the processing in steps 201 to 211 in FIG. 8 is the same as that in steps 101 to 111 described above. For this reason, the process after step 212 is demonstrated here.

  In this process, if it is not determined in step 204 that all of the preceding sheets can be discharged, first, the sheet conveyance control unit 120B functioning as a discharge unit and a sheet conveyance unit performs a sheet (sheet) from the interposer 240. In this case, the second sheet which is a sheet stacking unit different from the first sheet stacking unit 235 is supplied to the first transport path R1 and transported along the first transport path R1. The paper is discharged to the paper stacking unit 222 (outside the paper processing unit 200) (step 212). Referring to FIG. 9, when the last paper among the preceding papers is located in the image forming unit 100 and all the preceding papers cannot be discharged, the paper transport control unit 120B removes the paper from the interposer 240. The paper is discharged to the second paper stacking unit 222 via the first transport path R1. As a result, as shown in the figure, the second sheet stacking unit 222 is loaded with sheets from the interposer 240.

  Here, for example, when the length of the sheet from the interposer 240 is long (when the size is large), the sheet from the interposer 240 waits in a curved (bent) state as indicated by reference numeral P1 in FIG. There is. As a result, the paper is likely to be warped. For this reason, in this process, if it is not determined in step 204 that all the preceding sheets can be discharged, first, the sheet from the interposer 240 is discharged. As a result, warpage of the paper from the interposer 240 is suppressed.

  Note that the discharge of the sheet from the interposer 240 may be performed according to the size of the sheet. For example, in the case of a sheet having a size smaller than a predetermined size, the sheet is kept waiting at the standby position, and in the case of a sheet having a size larger than a predetermined size, it can be discharged as described above. . Here, the size of the paper can be grasped based on, for example, an output from the size detection sensor Y (see FIG. 1).

  Further, even when the paper size is large, the warp is less likely to occur when the paper is thin. For this reason, whether or not to perform the discharge may be determined in consideration of not only the paper size but also the paper thickness and basis weight. In other words, the paper can be discharged when it is one type of paper that is likely to warp, and not discharged when it is another type of paper that is unlikely to warp. Note that the paper type can be grasped based on the output from the size detection sensor Y or information input by the user via the UI 400.

  Thereafter, in this process, the UI control unit 120C notifies the fact that it is necessary to remove the paper in the jam generation unit via the UI 400, similarly to step 112 (step 213). Thereafter, the UI control unit 120C, which functions as one of the notification units, notifies the user that the sheet discharged from the second sheet stacking unit 222 (the sheet from the interposer 240) is to be reset (reloaded) on the interposer 240. To the user via the UI 400 (step 214). As a result, as shown in FIG. 9, the sheets in the second sheet stacking section 222 are reset in the interposer 240. Next, the sheet conveyance control unit 120B and the image formation control unit 120D restart the sheet conveyance and the image formation as described above (step 215).

When a jam occurs in the image forming system 1, the overall control unit 120 can perform the following processing.
FIG. 10 is a flowchart illustrating processing executed by the overall control unit 120. In addition, the process in step 301-step 311 in this figure is the same as the process in said step 101-step 111. Therefore, the processing after step 312 will be described.

  In this process, if it is not determined in step 304 that all the preceding sheets can be discharged, the UI control unit 120C needs to remove the paper in the jam generation unit via the UI 400 as in step 112. (Step 312). Next, the paper management unit 120A determines whether the paper in the jam generation unit has been removed based on the output from the paper detection sensor S2 (step 313).

  If it is determined in step 313 that the paper in the jam generating unit has been removed, the UI control unit 120C indicates that the paper from the interposer 240 can be discharged out of the apparatus when the UI 400 presses the push button. Display (notification) is performed (step 314). More specifically, a button (area) for receiving a user operation is displayed on the UI 400. When this button is pressed, a message that the sheet from the interposer 240 can be discharged, and a sheet discharge destination (for example, the second sheet stacking unit 222) from the interposer 240 are displayed.

  When the user presses the press button on the UI 400 (when an instruction from the user is received), the paper transport control unit 120B discharges the paper from the interposer 240 to the second paper stacking unit 222, for example. As in the process shown in FIG. 8, there is a method of uniformly discharging the paper from the interposer 240. In this case, however, the user may not recognize that the paper from the interposer 240 has been discharged. Therefore, in this process, the paper from the interposer 240 is discharged based on the user's instruction so that the user can recognize that the paper from the interposer 240 is discharged.

  After step 314 is completed, the sheet conveyance control unit 120B and the image formation control unit 120D resume the sheet conveyance and the image formation as described above (step 315). When the paper discharged from the discharge process (paper from the interposer 240) is reset in the interposer 240 at the time of the restart, the reset paper is supplied. When the discharge process is not executed (when the sheet from the interposer 240 is stopped in the apparatus), the sheet located in the apparatus is supplied.

When a jam occurs in the image forming system 1, the overall control unit 120 can perform the following processing.
FIG. 11 is a flowchart illustrating processing executed by the overall control unit 120. In addition, the process in step 401-step 411 in this figure is the same as the process in said step 101-step 111. Therefore, the processing after step 412 will be described.

  In this process, if it is determined in step 404 that all the preceding sheets can be discharged, first, the UI control unit 120C needs to remove the paper in the jam generation unit via the UI 400, as described above. A notification is made (step 412). As a result, the paper is removed from the jam generating unit by the user, and the user presses the start button after the paper is removed.

  Next, the UI control unit 120C determines whether or not the start button has been pressed within a predetermined time after the standby of the sheet from the interposer 240 is started (step 413). If the start button is pressed within a predetermined time, the paper conveyance control unit 120B and the image formation control unit 120D resume paper conveyance and image formation as described above (step 415). Note that when restarting, the paper from the interposer 240 waiting in the apparatus is supplied.

  On the other hand, if the start button is not pressed within the predetermined time, the paper transport control unit 120B discharges the paper from the interposer 240 to the second paper stacking unit 222 (step 414). Thereafter, on condition that the start button is pressed, the sheet conveyance control unit 120B and the image formation control unit 120D resume the conveyance of the sheet and the image formation (step 415). When the paper discharged from the discharge process (paper from the interposer 240) is reset in the interposer 240 at the time of the restart, the reset paper is supplied.

  In this processing, in a situation where the time until the paper conveyance and image formation is restarted is short and the paper from the interposer 240 is not easily warped, the paper is not discharged, and the time until the restart is long, the paper from the interposer 240 is warped. In such a situation where paper is likely to occur, the paper is discharged.

  In the image forming system 1 according to the present embodiment, the processes shown in FIGS. 4, 8, 10, and 11 can be selected. That is, the user can select each process (each mode) shown in FIGS. 4, 8, 10, and 11 via the UI 400. Then, the processing content (mode) selected by the user is notified to the UI control unit 120C, the paper conveyance control unit 120B, and the image formation control unit 120D, and the UI control unit 120C, the paper conveyance control unit 120B, and the image formation control. The unit 120D performs an operation according to the selected process. Also, the processes shown in FIGS. 4, 8, 10, and 11 can be combined with each other.

DESCRIPTION OF SYMBOLS 1 ... Image forming system, 100 ... Image forming unit, 120B ... Paper conveyance control part, 120C ... UI control part, 120D ... Image formation control part, 200 ... Paper processing unit, 300 ... Paper supply unit, 340 ... Paper storage part, 500 ... transport roll, R1 ... first transport path

Claims (13)

An image forming unit for forming an image on the conveyed paper;
A supply unit having a transport path connected to the image forming unit, sequentially transporting paper along the transport path, and sequentially supplying the paper to the image forming unit;
A transport unit that sequentially transports the paper transported from the image forming unit along a transport path;
A supply unit configured to supply the sheet sent from the sheet stacking unit to the transport path so as to follow a sheet that is transported through the transport path of the transport unit and on which a predetermined image is formed;
Stop means for stopping the conveyance of paper in the image forming unit and the supply unit when a paper conveyance failure occurs in the image forming unit;
Resuming means for resuming conveyance of paper in the image forming unit and the supply unit after the paper is removed from the image forming unit;
An image is formed by the image forming unit on the paper that is positioned on the transport path of the supply unit and transported to the image forming unit by the restart by the restarting unit when the stop is stopped. First processing means;
When the sheet on which the predetermined image is formed is conveyed to the conveyance unit by the resumption by the resumption means, the sheet fed from the sheet stacking unit by operating the supply means is moved to the conveyance path. Second processing means for supplying to
Including an image forming system.   When the sheet on which the predetermined image is formed is positioned downstream of the image forming unit in the sheet conveyance direction when the stop is stopped by the stop unit, the sheet supply unit is operated to operate the sheet. The image forming system according to claim 1, further comprising a third processing unit that supplies the sheet fed from the stacking unit to the conveyance path.   The first processing unit forms an image formed on the paper removed from the image forming unit on the paper sequentially conveyed to the image forming unit by the restart, and the removed The image forming system according to claim 1, wherein an image that is scheduled to be formed on a sheet is formed. An image forming unit for forming an image on the conveyed paper;
A supply unit having a transport path connected to the image forming unit, sequentially transporting paper along the transport path, and sequentially supplying the paper to the image forming unit;
The paper transported from the image forming unit is transported sequentially along the transport path and stacked on the paper stacking unit, and has a branch transport path branched from the transport path, and the paper in the transport path is referred to as the paper stacking unit. Is a transport unit that can be loaded on different paper stacking units,
A supply unit configured to supply the sheet sent from the sheet stacking unit to the transport path so as to follow a sheet that is transported through the transport path of the transport unit and on which a predetermined image is formed;
Stop means for stopping the conveyance of paper in the image forming unit and the supply unit when a paper conveyance failure occurs in the image forming unit;
After the sheet is removed from the image forming unit, the conveyance of the sheet in the image forming unit and the supply unit is resumed, and when the stop is performed by the stop unit, the sheet is positioned on the conveyance path of the supply unit. Paper transport means for transporting the collected paper to the different paper stacking unit in the transport unit;
Including an image forming system. The supply unit includes a paper storage unit that stores paper, and sequentially transports the paper fed from the paper storage unit along the transport path,
5. The image forming apparatus according to claim 4, further comprising notification means for notifying a user of re-accommodation of the paper conveyed by the paper conveyance means and loaded on the different paper stacking unit into the paper storage unit. system.   When the sheet on which the predetermined image is formed by the stop by the stop unit is not conveyed to the conveyance unit, the sheet fed from the sheet stacking unit by operating the supply unit is moved to the sheet of the conveyance unit. 6. The image forming system according to claim 4, further comprising discharge means for supplying the sheet supplied to the conveyance path and discharging the supplied sheet to the outside of the conveyance unit. An image forming unit for forming an image on the conveyed paper;
A supply unit having a transport path connected to the image forming unit, sequentially transporting paper along the transport path, and sequentially supplying the paper to the image forming unit;
The paper transported from the image forming unit is transported sequentially along the transport path and stacked on the first paper stacking unit, and has a branch transport path branched from the transport path, and the second paper is transported on the transport path. A transport unit that can be loaded on the paper stacking unit of
A supply unit configured to supply the sheet sent from the sheet stacking unit to the transport path so as to follow a sheet that is transported through the transport path of the transport unit and on which a predetermined image is formed;
Stop means for stopping the conveyance of paper in the image forming unit and the supply unit when a paper conveyance failure occurs in the image forming unit;
When the sheet on which the predetermined image is formed is not conveyed to the conveyance unit due to the stop by the stop unit, the supply unit is operated to supply the sheet sent from the sheet stacking unit to the conveyance path. Sheet conveying means for conveying the supplied sheet to the second sheet stacking unit;
Including an image forming system. Resuming means for resuming conveyance of paper in the image forming unit and the supply unit after the paper is removed from the image forming unit;
An image is formed by the image forming unit on the paper that is positioned on the transport path of the supply unit and transported to the image forming unit by the restart by the restarting unit when the stop is stopped. 8. The image forming system according to claim 7, further comprising image forming means. Resuming means for resuming conveyance of paper in the image forming unit and the supply unit after the paper is removed from the image forming unit;
When the stop is made by the stop unit, the sheet that is located on the transport path of the supply unit and is transported by the restart by the restart unit is transported to a third sheet stacking unit provided in the transport unit. Paper transporting means,
The image forming system according to claim 7, further comprising:   The sheet conveying unit is sent out from the sheet stacking unit when the sheet on which the predetermined image is formed by the stopping by the stopping unit is not conveyed to the conveying unit and when an instruction from a user is received. The image forming system according to claim 7, wherein the sheet is conveyed to the second paper stacking unit. The sheet sent out from the sheet stacking unit temporarily waits at a predetermined position,
The sheet conveying means conveys the waiting sheet to the second sheet stacking unit after a predetermined time has elapsed since the waiting of the sheet was started. The image forming system according to claim 9.   12. The image according to claim 7, further comprising notification means for notifying a user to reload the sheet conveyed to the second sheet stacking unit on the sheet stacking unit. Forming system. It further comprises grasping means for grasping the type of the sheet,
The sheet conveying unit conveys the sheet to the second sheet stacking unit when the sheet is one type of sheet, and transfers the sheet to the second sheet stacking unit when the sheet is another type of sheet. The image forming system according to claim 7, wherein the image forming system is not transported to the second paper stacking unit.

Images