JP2006130817A - Image formation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image formation system of high usability enabling a single printing document to be formed by combining printed sheets concerning a plurality of files and enabling the reliability of a sheet post-processing device to be maintained. <P>SOLUTION: When transmitting two or more job data to an image formation device, a host computer performs a processing of giving a head job instruction data for instructing the head job data to be the head as well as a final job instruction data for instructing the final job data to be the final, respectively. If receiving the head job instruction data received from the host computer, the image formation device recognizes the job data, which is held by both the head and the final job instruction data, to be a plurality of job data as the single printing document and performs an image formation processing for the sheets while performing the post-processing for the sheets on which the images of the two or more job data have been formed when receiving the final job instruction data. The image formation device interrupt the post-processing between the jobs of the two or more job data. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a printer for printing digital information using electrophotographic technology, a multi-function printer having a multi-functional function by mounting an image reading device on the top of the printer body, and a sheet post-processing device. The present invention relates to an image forming system provided.

  Printers have been widely spread and developed from business use to personal and from monochrome to color due to digitization of information and IT revolution. On the other hand, the development of digitalization has become a member who promotes the integration of printer functions. The printer, which has been positioned as an output of information terminal equipment such as personal computers, can now be positioned as a product that combines multiple previously functional products such as copy, facsimile, and image input devices. I came.

  This is because the development technology base for new products with high cost performance and space-saving has been established. A typical example of the product is an MFC (multifunction copier) in which a conventional copier is digitized and a network function is added, or an MFP (multifunction printer) in which an image input function is added to a conventional printer.

  In such an image forming apparatus, the sheet is discharged from a sheet discharge port provided on the side surface of the image forming apparatus main body, and is conveyed to the inside of the sheet post-processing apparatus mounted on the side surface of the image forming apparatus main body.

  The sheet post-processing device is provided on a side surface of the image forming apparatus main body on the sheet discharge port side, aligns the end portions of the sheets sequentially supplied from the sheet discharge port of the image forming apparatus main body, and performs stapling or the like. A staple stacker of a type that performs post-processing and discharges is known.

In such an image forming apparatus and sheet post-processing apparatus, when a plurality of files (separate files such as words and Excel) created by a user on a computer are printed as one document and post-processing such as stapling is performed, As described in Patent Document 1, after a plurality of files on a computer are collected as one print data, the print data is sent to an image forming apparatus and a sheet post-processing apparatus, and print processing and post-processing processing are performed. Alternatively, a plurality of files are printed out by the image forming apparatus and then manually sorted to form a staple print.
JP-A-11-129586

  However, in such a conventional image forming apparatus, when the staple stacker performs a stapling process on a plurality of printed sheets, when the user instructs the printer driver to print each file, the host computer generates one job data. After being collected, the image is transmitted to a video controller provided in the image forming apparatus and the image forming apparatus prints on the sheet. Then, the sheet is sent to the sheet post-processing apparatus, and post-processing such as stapling is performed. However, in such an image forming system, since processing for collecting job data by the host computer is required, a large load is imposed on the host computer, and thus there is a problem that other processing cannot be performed during document summarization work. .

  In addition, after the job data is transmitted from the host computer, if the total number of sheet bundles on which the job data is formed exceeds the processing limit number of the sheet post-processing device, failure prevention of the sheet post-processing device can be performed. For this reason, since the sheet bundle is discharged outside the apparatus without being subjected to post-processing, there is a problem that the usability is deteriorated because the user has to post-process the sheet bundle manually. .

  An object of the present invention is to provide an image forming system with high usability capable of creating a single printed document by combining printed sheets of a plurality of files and maintaining the reliability of the sheet post-processing apparatus. There is.

  An application program, a printer driver, and the like are installed on the host computer. The application program is software for creating print contents, such as document creation software, diagram creation software, and spreadsheet software.

  A first configuration of a sheet post-processing apparatus and an image forming apparatus according to the present invention includes a host computer that creates job data, an image forming apparatus that performs printing based on job data received from the host computer, and a printed sheet In the image forming system composed of the sheet post-processing apparatus that performs post-processing on the head, when the host computer transmits a plurality of job data to the image forming apparatus, the head job instruction data that instructs the head of the head job data is the head , And the final job data is added to the final job data. The image forming apparatus receives the first job instruction data received from the host computer, and receives the final job instruction data. Multiple job data as a single print document Performs printing on a sheet is recognized as data, and performs post-processing on the plurality job data printed sheet when receiving the last job instruction data.

  According to the second configuration of the sheet post-processing apparatus and the image forming apparatus according to the present invention, when the user manually instructs the stapling of a plurality of jobs from the operation panel, the image forming apparatus performs printing when the stapling instruction is received. Printing is performed up to the job data immediately before the current job data, and post-processing is performed on a plurality of job data until printing.

  In the third configuration of the sheet post-processing apparatus and image forming apparatus according to the present invention, the counting means counts the total number of sheets required for the job data received from the host computer, and the total number of sheets and the sheet post-processing apparatus are arranged. When the comparison unit that compares the predetermined post-processing limit sheet number of the post-processing unit detected that the total number of the received job data has reached the predetermined post-processing limit sheet number, the image forming apparatus Printing is performed up to the job data immediately before the job data reaching the limit, and post-processing is performed on a plurality of job data until printing.

  In the fourth configuration of the sheet post-processing apparatus and the image forming apparatus according to the present invention, the total thickness detecting unit detects the total thickness of the sheet of job data received from the host computer, and the total sheet thickness and the sheet post-processing apparatus are detected. When the comparison means that compares the predetermined post-processing limit sheet number of the post-processing means disposed in the sensor detects that the total thickness of the received job data has reached the predetermined post-processing limit sheet number, The image forming apparatus is characterized in that printing is performed up to job data one before the job data reaching the limit, and post-processing is performed on a plurality of job data until printing.

  As described above, according to the present invention, when a plurality of data files are printed together in one print document, the processing load on the host computer side can be reduced. In addition, even when the printed document exceeds the limit number of post-processing means such as stapling, the document can be divided and stapled, so that the user does not have to manually post-process the sheet bundle. Can be improved.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, an example of a sheet post-processing apparatus mounted on an image forming apparatus typified by a laser printer-based multifunction printer will be described.

(Explanation regarding block diagram of image forming system)
FIG. 1 is a block diagram showing an entire image forming system according to an embodiment of the present invention.

  The image forming apparatus 1 includes a video controller 303, an engine controller 304, an option controller 305, and an operation panel 306. As shown in FIG. 3, the video controller 303 is electrically connected to the engine controller 304, the option controller 305, the operation panel 306, and the host computer 301.

  The video controller 303 has storage means for storing job data received by the image forming apparatus 1 and control means for controlling the engine controller 304, option controller 305, and operation panel 306. The video controller 303 develops the job data to create image data for printing, and transmits the image data to the engine controller 304. The engine controller 304 causes the image forming unit to perform printing on the sheet based on the image data. The video controller 303 determines whether or not post-processing is designated in the job data, and if post-processing is instructed, instructs the option controller 305 to post-process. The sheet post-processing device performs post-processing on the printed sheet. Execute. In addition, the video controller 303 transmits image forming system status information to the operation panel 306, and the operation panel 306 clearly indicates the received signal to the user. Information input from the operation panel 306 by the user is transmitted to the video controller 303, and the video controller 303 controls the image forming system based on the received information.

(Explanation about the configuration of multiple job data)
An application program, a printer driver 302, and the like are installed in the host computer 301. The application program is software for creating image formation contents, such as document creation software, diagram creation software, and spreadsheet software.

  The data file created by the application program is converted as job data by the printer driver. At this time, the user performs a procedure for instructing the printer driver to be the first job of a plurality of job data, and the job data is transmitted to the image forming apparatus. Thereafter, the user instructs the printer driver to convert other data files as job data, and the job data is transmitted to the image forming apparatus. When the user performs a procedure for converting the final data file into job data by the printer driver in a plurality of job data, the user also performs a procedure for instructing that the job is the final job, and the job data is transmitted to the image forming apparatus. The

  Next, the configuration of a plurality of job data as a single print document will be described with reference to FIG. When the video controller 303 that received the job data from the host computer recognizes that the first job instruction data is added to the job data, the video controller 303 recognizes that the subsequent job data is a plurality of job data as one document. To do. Then, the video controller 303 connects the job data received thereafter to the leading job instruction data in order as shown in FIG. When the final job data to which the final job instruction data is added is received, it is recognized that the plurality of job data so far is completed as one sentence.

(Description of image forming apparatus)
FIG. 1 is a main cross-sectional view that best shows the sheet conveying path of the present invention. 1 is an image forming apparatus having an image reading unit, 2 is a sheet feeding cassette, 3 is a sheet feeding roller, and 4 is a separation / conveying roller pair. 5, 6 and 7 are conveying paths, 8 is a registration roller, 9 is an image forming process unit (hereinafter referred to as a cartridge), and 10 is an image forming drum. Reference numeral 11 denotes a fixing device, and reference numeral 12 denotes a fixing discharge roller pair. Reference numeral 13 denotes a fixing paper discharge sensor, and reference numeral 14 denotes a writing scanner for image formation. A sheet thickness sensor 70 detects the thickness of the recording material conveyed in the apparatus. A staple stacker 200 is provided on the side of the printer body.

  A sheet-like recording material (hereinafter simply referred to as “sheet”) S stacked and stored in the paper feed cassette 6 is fed by a paper feed roller 7 that rotates counterclockwise in the drawing, and is guided to a transport path 6. To the nip portion of the registration roller pair 8. Next, the sheet S is sent between the photosensitive drum 10 and the transfer roller pair by the registration roller pair 8. At this time, the sheet thickness sensor 70 provided in the vicinity of the registration roller pair 8 detects the thickness of each conveyed sheet S.

  The photosensitive drum 10 rotates clockwise in the drawing and is uniformly charged. Then, an electrostatic latent image is sequentially formed on the outer peripheral surface by the laser light from the laser scanner 14, and then the electrostatic latent image is developed to form a toner image. The laser beam starts to be written from the front side of the figure and forms an electrostatic latent image on the photosensitive drum 10 toward the back side.

  On the sheet S sent between the photosensitive drum 10 and the transfer roller pair, toner images on the photosensitive drum 10 are sequentially transferred by the transfer roller.

  The sheet material S to which the toner image is transferred in this way is sent to the fixing device 11 where it is heated and pressed. A fixing roller pressure roller is provided in the fixing device 4 to form a nip 12. The toner image is fixed on the sheet S by passing through the nip 12.

  After the image has been fixed, the sheet S passes through one of the transport paths 30 and 18, passes through the discharge roller pair 32, and is transported to the staple stacker 200 by so-called face-up discharge and face-down discharge, respectively.

  The plurality of sheets S conveyed to the staple stacker 200 are aligned at each end, subjected to a stapling process by the stapler 204, and then discharged to the outside of the apparatus.

(Function)
Next, the operation of the present embodiment will be described based on the flowcharts of FIGS.

  First, printing is instructed from the application program to the printer driver 302 (S401). A message for inquiring whether the job data is the head job data of a plurality of jobs is displayed on the host computer screen (S402, S403). If it is the head job data, the user operates the affirmative input button and performs the print instruction button operation, and the head job instruction data is added to the head job data (S404). After that, the user operates the button for instructing the printer driver to print a file constituting a plurality of jobs according to a desired order. When a series of operations have been completed for a plurality of files and the job is the final job, the user operates an input button indicating that the final job data of the plurality of jobs is present on the printer driver and performs a button operation for a print instruction (S405). Final job instruction data is added to the final job data (S406). When a plurality of jobs are collectively input to the printer driver 302, the first job instruction data is automatically added to the first job data and the last job instruction data is automatically input to the last job instruction data according to the order. Is given (S401). The plurality of data files designated for printing are converted into job data via the printer driver 302 and transmitted to the video controller 303 of the image forming apparatus 1 (S407).

  Further, as shown in the flowchart of FIG. 5 which is the same flow as the flowchart of FIG. 4 until the flow of adding the first job instruction data, a plurality of job data is transmitted (S505), and in the case of the last job data (S506), the final The job instruction data may be transmitted (S507) or the final job data may be transmitted.

  The video controller 303 receives job data (S601). An image is developed based on the received job data to create image data for printing. The image forming apparatus 1 performs printing on the sheet based on the image data (S602). Printing of one job data is completed (S603). If this job data head job instruction data is given, the subsequent plurality of job data are recognized as a plurality of job data as a single print document (S604). Then, a series of image forming processes are performed.

  In addition, job data that is not recognized as plural job data, for example, a job received by copying or faxing or a job group transmitted from another host computer is stored in a storage means provided in the video controller 303, and plural job data is processed. After that, the process is performed.

  The video controller 303 recognizes that the last job instruction data is given to the last job of the plurality of job data (S505). When the video controller 303 recognizes the final job instruction data (S605), it instructs the option controller 305 to perform a stapling process after the final job is printed as a stapling instruction command, and the staple stacker 200 applies to the printed sheet. A stapling process is performed (S606). The stapled sheet bundle is discharged out of the apparatus by the sheet bundle discharge mechanism of the staple stacker.

  In addition, the video controller 303 receives the first job instruction data, then receives a plurality of job data, executes the print processing of the first plurality of job data, and then does not receive the final job data. When the second head job instruction data is received, the video controller 303 regards the second head job instruction data as the final job instruction data of the plurality of job data (S605), and executes a series of post-processing to the option controller. The staple stacker 200 performs a stapling process on the printed sheet (S606). The stapled sheet bundle is discharged out of the apparatus by the sheet bundle discharge mechanism of the staple stacker.

  As described above, when the host computer transmits a plurality of job data to the image forming apparatus, the head job instruction data for instructing the head is added to the head job data and the final job data is final. When the image forming apparatus receives the first job instruction data received from the host computer, the job data held between the last job instruction data and the final job instruction data is processed as a single print document. As a plurality of job data, the image forming process is performed on the sheet, and when the final job instruction data is received, the plurality of job data is post-processed on the image formed sheet. Combine printed sheets of multiple files without imposing a heavy load on It is possible to create one of the printed document.

  In this embodiment, job data that has not been recognized as a plurality of job data is stored in the storage means provided in the video controller, and the configuration is described in which the recognized job data is preferentially processed. A similar effect can be obtained even in a configuration in which job data is stored in the storage means and job data that has not been recognized is preferentially processed.

  The operation of the present embodiment will be described based on the flowcharts of FIGS.

  When the user recognizes that the total number of multiple job data exceeds the staple number limit of the stapling means provided in the staple stacker, the user issues a stapling instruction at an arbitrary time to divide the multiple job files. A case where post-processing is performed on the sheet bundle will be described. In addition, about the matter demonstrated in the said embodiment, the same code | symbol is attached | subjected and description is abbreviated.

  The job data created by the host computer 301 is transmitted to the video controller 303. While the video controller 303 is printing the sheet based on the job data to the image forming apparatus, the user can press the stapling button from the operation panel 306. Is operated (S801). The operation panel 306 transmits the stapling instruction data for the sheet bundle to the video controller 303 (S802). The video controller 303 receives the stapling instruction data (S704) and, as shown in FIG. 2- (b), the job data up to the job one before the job that is performing the printing process when the stapling instruction data is received. Divide by. Then, a staple instruction command is interrupted after the divided job data.

  When the printing of the data up to the stapling instruction command for the divided job data is completed based on the divided job data, the video controller 303 sends the sheet bundle to the option controller 305. Send stapling instructions to. The option controller 305 that has received the stapling instruction executes a stapling process on the sheet bundle S (S708). Then, the staple stacker 200 performs a bundle discharge process of the sheet bundle. If the plurality of divided job data does not require stapling, the necessity of stapling is input from the operation panel 306 (S701), and the video controller 303 instructs the staple stacker 200 to perform bundle bundle discharging processing (S702). . The staple stacker 200 performs bundle bundle discharge processing. A series of processing is then resumed for the remaining jobs in the plurality of job data (S705, S706, and S707).

  As described above, when the user manually instructs stapling of a plurality of jobs from the operation panel, the image forming apparatus receives the stapling instruction up to the job data immediately before the job data that has been subjected to printing processing. By performing the printing process and performing post-processing on the sheets on which the plurality of job data has been printed, the sheet bundle is not discharged outside the apparatus without performing the stapling process. Even when the limit of the number of post-processing means is exceeded, the document can be divided and stapled, so that it is possible to improve usability since the user does not have to manually reprocess the sheet bundle.

  Although the configuration in which the user manually instructs stapling of a plurality of jobs from the operation panel has been described, the same effect can be obtained even in the configuration in which the stapling instruction is issued from the printer on the host computer.

  In this embodiment, the stapler is described as the post-processing means exceeding the processing limit, but the same effect can be obtained even in the case of other post-processing means such as a puncher.

  In the present embodiment, the case where the processing limit of the stapler is exceeded has been described. However, the same effect can be obtained even when the processing limit of the aligning means for aligning the edge of the sheet bundle is exceeded.

  The operation of the present embodiment will be described based on the flowcharts of FIGS.

  A description will be given of a case where the sheet post-processing apparatus divides the sheet bundle based on the number of sheets and performs post-processing on the sheet bundle. In addition, about the matter demonstrated in the said embodiment, the same code | symbol is attached | subjected and description is abbreviated.

  The job data created by the host computer 301 is received by the video controller 303 (S902), and when the image data is created based on the job data, the video controller 303 requires the number of sheets S required to print the image data. Is counted (S903). Then, the number of sheets is compared with the limit of the number of staples of the stapler 204 provided in the staple stacker 200 (S904). If the total number of sheets to be stapled is less than the staple number limit of the stapling means, the video controller 303 continuously instructs the image forming engine to print and issues a stapling instruction to the staple stacker (S905). , S906, S907). When the total number of sheets to be stapled is equal to or greater than the binding number limit of the stapler 204, the video controller 303 sets the print data as a plurality of job data as shown in FIG. The file is divided up to one file before. Then, a staple instruction command is interrupted after the divided job data.

  The video controller 302 creates image data based on a plurality of divided job data, and instructs the engine controller 303 to print on a sheet. Then, when the printing of the data up to the staple instruction command of the divided plural job data is finished, the printing is temporarily stopped, and the video controller 303 transmits a staple instruction to the sheet bundle to the option controller 305. Upon receiving the staple instruction, the option controller 305 instructs the staple stacker to execute bundle bundle discharge processing (S908). Then, the staple stacker 200 performs a bundle discharge process of the sheet bundle. A series of processing is then resumed for the remaining jobs in the plurality of job data (S705, S706, and S707).

  If the number of sheets in one job is greater than or equal to the binding number limit of the stapling means, the video controller 303 stops the printing process (S908). Then, via the video controller 302 or the operation panel 306, it is displayed to the user that the number of sheets of the job is greater than or equal to the staple number limit of the stapler 204 and the printing process is stopped.

  As described above, the counting means for counting the total number of sheets required for the job data received from the host computer detects the total number of received job data, and the post-processing disposed in the sheet post-processing apparatus. When the comparing means for comparing the predetermined post-processing limit sheet number of the means detects that the total number of the received job data has reached the predetermined post-processing limit sheet number, the image forming apparatus detects the job reaching the limit. By performing the image forming process up to the job data immediately before the data, the sheet bundle is not discharged outside the apparatus without performing the stapling process. Even if it exceeds the limit, the document can be divided and stapled so that the user does not have to manually reprocess the sheet bundle. In it is possible to improve the usability.

  The operation of the present embodiment will be described based on the flowcharts of FIGS.

  A case will be described in which the print data is divided based on the thickness of the sheet bundle and post-processing is performed on the sheet bundle in the sheet post-processing apparatus. In addition, about the matter demonstrated in the said embodiment, the same code | symbol is attached | subjected and description is abbreviated.

  The image forming apparatus 1 includes a paper thickness detection sensor 70. When job data created by the host computer 301 is received by the video controller 303 (S1002), image data is created based on the job data and printing is started, the thickness of the first sheet S is detected. Sensor 70 detects. At this time, the printer controller 303 counts the number of sheets S on which image data is printed, and predicts the thickness of the sheet bundle from the counted number of sheets and the detected sheet thickness (S1003). Then, the sheet bundle thickness is compared with the staple thickness limit of the stapler 204 provided in the staple stacker 200 (S904). If the thickness of the sheet bundle to be stapled is smaller than the staple thickness limit of the stapler 204, the printer controller 203 continuously instructs the image forming apparatus 1 to print and issues a staple instruction to the staple stacker 200 (S1005). , S1006, S1007). If the thickness of the sheet bundle to be stapled is equal to or greater than the staple thickness limit of the stapling means 204, the video controller 303 divides a plurality of job data. That is, the video controller 303 divides the print data into a plurality of job data up to a file one file before the stapling thickness limit of the stapling means as shown in FIG. Then, a staple instruction command is interrupted after the divided job data.

  The video controller 303 creates image data based on a plurality of job data created by division, and instructs the engine controller 304 to print on a sheet. Then, when the printing of the data up to the staple instruction command of the divided plural job data is finished, the printing is temporarily stopped, and the video controller 303 transmits a staple instruction to the sheet bundle to the option controller 305. The option controller 305 that has received the stapling instruction (S704) instructs the staple stacker to perform bundle bundle discharge processing (S708). Then, the staple stacker 200 performs a bundle discharge process of the sheet bundle. A series of processing is resumed for the remaining jobs in the plurality of job data (S705, S706, and S707).

  If the sheet thickness is equal to or greater than the binding thickness limit of the stapling means in one job, the video controller 303 stops the printing process (S1008). Then, via the video controller 303 or the operation panel 306, it is displayed to the user that the sheet thickness of the job is equal to or greater than the binding number limit of the stapler 204 and the printing process is stopped.

  As described above, the detecting means for detecting the total thickness of the sheet of job data received from the host computer detects the total thickness of the sheet required for the received job data, and is disposed in the total sheet thickness and the sheet post-processing apparatus. When the comparison means for comparing the predetermined post-processing limit sheet number of the post-processing means detected that the total thickness of the received job data has reached the predetermined post-processing limit sheet number, the image forming apparatus Performs the image forming process up to the job data before the job data that reaches the limit, and post-processes the plurality of job data on the image-formed sheet, thereby performing the sheet processing without performing the stapling process. In order not to be discharged outside the device, even if the printed document exceeds the limit of the number of post-processing means such as stapling, the document is divided and stapled. Since it is possible it is possible to improve the usability because there is no effort by the user re-post-processing the sheet bundle by hand.

1 is a longitudinal sectional view of an image forming apparatus and a sheet post-processing apparatus according to the present invention. It is a block diagram of job data according to the present invention. 1 is a block diagram of an image forming system according to the present invention. It is a flowchart of the host computer which concerns on this invention. 3 is a flowchart of the image forming apparatus according to the first embodiment. 6 is a flowchart of the image forming apparatus according to the second embodiment. 10 is a flowchart of an operation panel according to the second embodiment. 10 is a flowchart of an image forming apparatus according to a third embodiment. 6 is a flowchart of an image forming apparatus according to a fourth embodiment. 6 is a flowchart of an image forming apparatus according to a fourth embodiment.

Explanation of symbols

1 Image forming apparatus main body 70 Sheet thickness sensor 200 Staple stacker 204 Stapler 301 Host computer 302 Printer driver 303 Video controller 304 Engine controller 305 Option controller 306 Operation panel S Sheet

Claims (12)

A host computer that creates job data, an image forming apparatus that performs image forming processing based on job data received from the host computer, and a sheet post-processing device that performs post-processing on a sheet that has undergone image forming processing In an image forming system,
When the host computer sends a plurality of job data to the image forming apparatus, the first job instruction data for instructing the first job data is added to the first job data, and the final job data is instructed to be final. Having data giving means for performing processing for giving instruction data;
When the image forming apparatus receives the first job instruction data from a host computer, the image forming system does not perform post-processing until the last job instruction data is received.   2. The image forming system according to claim 1, wherein the addition of the first job instruction data is executed before data transmission of the first page of the first job data.   The image forming system according to claim 1, wherein the final job instruction data is added after data transmission of the final page of the final job data.   2. The image forming system according to claim 1, wherein the assignment of the final job instruction data is executed before data transmission of the first page of the final job data.   2. A control unit according to claim 1, further comprising: when another head job instruction data is transmitted after the head job data is transmitted, job data transmitted before the other head job instruction data is regarded as final job instruction data. 2. The image forming system according to 1. A classifying unit for classifying whether or not the job data received from the host computer to the image forming apparatus is the job data designated by the data adding unit; and a storage unit for storing and storing the classified job data. ,
2. The image forming apparatus system according to claim 1, further comprising job data order selection means capable of selecting an order of image forming processing of job data designated by the designation means and job data not designated. The image forming system according to any one of claims 1 to 6,
A post-processing instruction means for instructing post-processing to the sheet post-processing apparatus for the image-formed sheet;
An image forming system in which a sheet post-processing apparatus performs post-processing on a sheet after completion of an image forming process for the job data when a post-processing instruction is received from a post-processing instruction unit.   8. The image forming apparatus system according to claim 7, wherein the post-processing instruction unit is an operation unit for setting the image forming system. The image forming system according to any one of claims 1 to 6,
Counting means for counting the total number of sheets of multiple job data received from the host computer;
Comparing means for comparing the predetermined number of post-processing limit sheets of the post-processing means disposed in the sheet post-processing apparatus,
An image characterized in that the comparison means performs image forming processing up to job data one job data before detecting that the total number of the received plurality of job data has reached the predetermined post-processing limit sheet number. Forming system. The image forming system according to any one of claims 1 to 6,
A sheet thickness detecting means for detecting the total thickness of the sheet bundle of job data received from the host computer;
Comparing means for comparing sheet thickness data by the sheet thickness detecting means and a predetermined post-processing limit sheet thickness of the post-processing means disposed in the sheet post-processing apparatus,
The image forming process is characterized in that the comparison means performs an image forming process up to the job data immediately before the job data in which it is detected that the total number of received job data has reached the predetermined post-processing limit sheet number. system. The image forming system according to claim 9 or 10,
A post-processing instruction means for instructing post-processing to the sheet post-processing apparatus for the image-formed sheet;
An image forming system, wherein when a post-processing instruction is received from a post-processing instruction unit, the sheet post-processing apparatus performs post-processing on the sheet after completion of the image forming process of the job data.   12. The image forming system according to claim 11, wherein the post-processing support means is an operation means for setting the image forming system.

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