JP2009192580A - Paper-conveying device, paper-conveying method and paper-conveying program for image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily take out jammed paper, by conveying the paper again by opening/closing operation of an opening/closing door, even if paper conveyance is stopped with the occurrence of jamming. <P>SOLUTION: A plurality of roller parts 33 are dispersedly arranged for conveyance of paper on a conveyance path 41, through which fed paper for image formation is conveyed. A first detection part 37 detects paper jamming on the conveyance path 41. A second detection part 27 detects the opening/closing operation of the opening/closing door 53, which is opened/closed from the outside in order to operate the inside of the image forming apparatus. When the second detection part 27 detects the opening/closing operation of the opening/closing door 53, in a state such that the first detection part 37 detects paper jamming, a driving control part 47 drives and controls the roller part 33 located at the position of the jammed paper only for a predetermined period. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sheet conveying apparatus, a sheet conveying method, and a sheet conveying program of an image forming apparatus. For example, a sheet conveying apparatus and a sheet conveying method used in a copying machine, a facsimile machine, or a multi-function peripheral (MFP) thereof. And improvement of the paper transport program.

  In recent years, in an image forming apparatus such as a copying machine, a facsimile machine, and a multifunction machine, an image is generally transferred and fixed in a process of transporting a fed sheet, and the sheet is discharged for some reason in the transport process. When a phenomenon called jam (JAM) that stops without being conveyed occurs, the jammed paper is quickly taken out and returned.

  That is, in this type of image forming apparatus, as shown in FIG. 6, generally, image transfer toner is stored in an image forming apparatus main body case (hereinafter abbreviated as a main body case) 3 having an opening / closing door 1. A toner container 5 is arranged, and a document placed under the document presser 7 is optically read by an optical system (not shown) to be converted into electronic data. This electronic data is printed on the printing paper 9 by the printing unit 9 using toner from the toner container 5. It is well known that when the paper is jammed, the door 1 is opened and the jammed paper is taken out when the paper is jammed.

  Reference numeral 11 in FIG. 6 is an operation unit for instructing the number of printed sheets, printing density, and the like, reference numeral 13 is a display unit for displaying operation contents and instruction contents, and reference numeral SW is a state in which the open / close door 1 is turned on. This switch detects the opening / closing operation, and the image forming apparatus operates under the ON state of the switch SW.

  However, in the image forming apparatus described above, there is a case where the jammed paper is hidden and cannot be seen even when the opening / closing door 1 is opened, and it is difficult to take out the jammed paper. .

  For example, the paper feeding device of the image forming apparatus disclosed in Japanese Patent Laid-Open No. 6-206646 (Patent Document 1) is of this type.

  In this patent document 1, when it is determined that a JAM has occurred at the position of the paper feed roller, the paper feed roller continues to rotate to the home position that avoids contact with the paper by one rotation. However, when the paper is jammed, it is easy to take out the unfed paper in the paper cassette.

  Also, a printer device disclosed in Japanese Patent Laid-Open No. 5-31979 (Patent Document 2) has been proposed.

This patent document 2 is configured such that when a paper jam occurs, the rotation of the paper conveying roller is continued, and after the jammed paper is discharged to the outside, the transfer drum is rotated to continue the printing process. This eliminates the need for manual jam release.
JP-A-6-206646 JP-A-5-31979

  However, in Patent Documents 1 and 2 described above, when a jam is detected, the paper feed roller is not pressed against the paper in the paper cassette, or the jammed paper is discharged without stopping near the fixing. Although it is easy to remove jammed paper, there are the following problems.

  That is, after the jammed paper is moved and stopped, the opening / closing door of the apparatus main body is opened to take out the paper, but it is assumed that the operator's hand is difficult to enter and the jammed paper cannot be removed. When the jammed paper is taken out, the paper is torn and a piece of paper remains, and it is expected that the jammed paper cannot be completely removed.

  Therefore, as a result of examining various configurations of the image forming apparatus, the present inventor transports the paper again and removes it when it is difficult to take out the paper or when the paper is torn and a piece of paper remains and the jam cannot be removed. The present invention has been completed by paying attention to many points that can be easily removed if it is brought to an easy position.

  SUMMARY An advantage of some aspects of the invention is that a sheet conveying apparatus, a sheet conveying method, and a sheet of an image forming apparatus that can easily remove a sheet that has been jammed and stopped by being conveyed again. The purpose is to provide a transportation program.

  In order to solve such a problem, the sheet conveying apparatus according to the present invention includes a plurality of image forming sheets distributed from a sheet feeding stage that are dispersedly arranged for conveying the sheet in a conveying path that conveys the sheet. A roller unit, a first detection unit that detects a jam of the paper on the conveyance path, a second detection unit that detects an opening / closing operation of an opening / closing door that is opened / closed from the outside in order to operate the inside of the apparatus, When the detection unit 1 detects a paper jam and the second detection unit detects an opening / closing operation of the door, a drive control unit that drives and controls a roller unit positioned on the jammed paper for a predetermined period of time. It has.

  The paper transport device of the present invention may be configured such that the drive control unit is configured to perform return control of the device from the jam state when the jammed paper is removed and the jam is no longer detected.

  In the paper conveying apparatus of the present invention, the drive control unit may be configured to drive the roller unit when the second detection unit detects the opening / closing operation a plurality of times.

  In the paper conveying apparatus of the present invention, after the roller unit is driven for a predetermined period, the drive control unit is formed so that when the second detection unit detects the opening / closing operation again, the roller unit is driven again. Configuration is also possible.

  The paper conveying apparatus of the present invention has a display unit that displays guidance information indicating a procedure for returning the apparatus from the jammed state of the paper, and performs an opening / closing operation of the open / close door in the guidance information displayed on the display unit. A configuration is also possible in which the drive control unit is formed so as to drive-control the roller unit when the second detection unit detects it.

  The paper transport method according to the present invention includes a transport process for transporting paper by a plurality of roller units distributed in a transport path for transporting image forming paper fed from a paper feed stage, and the transport thereof. A first detection process for detecting a jam of the paper on the road, a second detection process for detecting an opening / closing operation of an open / close door that is opened / closed from the outside in order to operate the inside of the apparatus, and the first detection process. In the state in which the jam of the paper is detected, a drive control process for driving and controlling the roller portion positioned on the jammed paper for a predetermined period when the second detection process detects the opening / closing operation of the door. Yes.

  In the paper conveying method of the present invention, it is also possible to perform a return control of the apparatus from the jammed state when the jammed paper is removed and the jam is no longer detected in the drive control process.

  In the paper conveying method of the present invention, it is also possible to drive the roller section when the second detection process detects the opening / closing operation a plurality of times in the drive control process.

  In the sheet conveying method of the present invention, the roller unit is driven for a predetermined period in the drive control process, and then the roller unit is driven again when the second detection process detects an opening / closing operation. Is also possible.

  The paper transport method of the present invention has a display process for displaying guidance information indicating a procedure for returning the apparatus from the jam state of the paper, and the guidance information displayed by the display process is displayed in the drive control process. A configuration in which the roller portion is driven and controlled when the second detection process detects an opening / closing operation of a certain door is also possible.

  Furthermore, the paper transport program of the present invention provides a control computer for controlling transport of paper by a plurality of roller units distributed in a transport path for transporting image forming paper fed from a paper feed stage. A first detection process for detecting a paper jam on the conveyance path, a second detection process for detecting an opening / closing operation of an open / close door that is opened / closed from the outside in order to operate the inside of the apparatus, and the first detection process; When the second detection process detects the opening / closing operation of the open / close door in a state where the paper jam is detected, the drive control process is performed to control the driving of the roller portion positioned on the jammed paper for a predetermined period. It is something to be made.

  In such a sheet conveying apparatus and a sheet conveying method according to the present invention, when the opening / closing door of the apparatus is opened / closed in a state where the sheet jam is detected on the conveying path, the roller portion positioned on the jammed sheet is moved for a predetermined period. Since the sheet is moved only under the drive control, it is possible to move again to a position where it is easy to take out the jammed and stopped sheet, and it is easy to remove the sheet.

  In the present invention, when the jammed paper is removed and the jam is no longer detected, the configuration in which the device is restored from the jammed state simplifies the return operation and improves the operability.

  In the present invention, when the opening / closing operation of the opening / closing door is detected a plurality of times, the roller portion is driven. Is less likely to occur and the operability is improved.

  In the present invention, after the roller portion is driven for a predetermined period, when the opening / closing operation of the opening / closing door is detected again, the roller portion is re-driven, even when the roller portion is activated and the sheet cannot be taken out, Since the sheet can be moved by re-driving the roller unit, the operability is improved in the same manner.

  In the present invention, the guidance information indicating the procedure for returning the apparatus from the jammed state of the paper is displayed, and when the opening / closing operation of the opening / closing door in the displayed guidance information is detected, the roller portion is driven and controlled. In this case, the opening / closing operation of the open / close door can be performed based on the display, and an operation error is unlikely to occur. Similarly, the operability is improved.

  Embodiments of a sheet conveying apparatus, a sheet conveying method, and a sheet conveying program of an image forming apparatus according to the present invention will be described below with reference to the drawings.

  The sheet conveying apparatus according to the present invention will be described in the form of being mounted on the image forming apparatus, and the sheet conveying method and the sheet conveying program according to the present invention will be described in the process of describing the sheet conveying apparatus.

  FIG. 1 and FIG. 2 are a schematic block diagram and a schematic internal configuration diagram showing an embodiment of an image forming apparatus A equipped with a paper conveying apparatus according to the present invention.

  1 and 2, the image forming apparatus A includes an image reading unit 17, a communication unit 19, a storage unit 21, an operation panel unit 23, a printing unit 25, and a second detection unit 27 with the main control unit 15 as a center. For example, it constitutes a multifunction machine. Although the image forming apparatus A has various configurations other than this, since it is not a main part of the present invention, the description and illustration thereof will be omitted, and the first detection unit 37 in the printing unit 25 will be described later.

  The main control unit 15 controls the image reading unit 17, the communication unit 19, the storage unit 21, the operation panel unit 23, the printing unit 25, and the second detection unit 27. Details will be described later.

  For example, in the image forming apparatus A of FIG. 2, the image reading unit 17 is disposed above the main body case 29, and optically reads an image from a printed document, for example, under the control of the main control unit 15, and performs a filter process or the like The generated print data is sequentially stored in the storage unit 21 for each page of the document. The internal configuration of the image forming apparatus A in FIG. 2 will be described later.

  Returning to FIG. 1, under the control of the main control unit 15, the communication unit 19 sends print data including images and documents to, for example, other multifunction devices (none shown) via the network. This is an interface unit that transmits / receives data according to a predetermined protocol and sequentially stores received print data in the storage unit 21 for each page.

  The storage unit 21 stores print data from the image reading unit 17 and the communication unit 19, an operation program of the main control unit 15, and guidance information 31 (see FIG. 4) described later, an operation screen, and the like. A hard disk (HDD).

  The guidance information 31 is information for instructing an opening / closing operation for opening and closing the opening / closing doors 53 and 1 described later in FIG. 6 or the like, for example, a procedure for removing the jammed paper when the paper is jammed in the middle of conveyance. .

  The operation panel unit 23 is disposed, for example, on the upper part of the main body case 29 of the image forming apparatus A in FIG. 2, and a liquid crystal display unit that displays the operation state of the image forming apparatus A and a liquid crystal operation panel that also serves as a touch switch input unit. It is made up of. Details of the display forms on the operation panel unit 23 will also be described later.

  Although not shown in detail, the operation panel unit 23 has a function as an instruction input unit for selecting a paper as a printing medium to be printed and executing or canceling printing under the control of the main control unit 15.

  1 includes a roller unit 33, an image forming unit 35, a first detection unit 37, a CPU, a memory unit storing an operation program of the CPU, and a control unit including an input / output interface (all illustrated. 2), and has a function of discharging print data by monochrome printing or color printing on a sheet to be fed and conveyed.

  That is, as shown in FIG. 2, a paper feed stage 39 disposed below the main body case 29 of the image forming apparatus A, a paper feed roller 33a that primarily feeds paper from the paper feed stage 39, and a paper feed The registration roller 33b that secondary feeds the paper that has been primarily fed by the roller 33a, the transfer roller 33c that transfers the toner image onto the paper that has been secondary fed by the registration roller 33b, and the pressure roller 33d. A fixing roller 33e and a pressure roller 33f for fixing the toner image on the transferred paper are dispersedly arranged for paper conveyance to form the printing unit 25.

  The paper feed roller 33a, registration roller 33b, transfer roller 33c, pressure rollers 33d and 33f, and fixing roller 33e form the above-described roller portion 33, and a paper transport path 41 is formed by the roller portion 33 and others. . The roller portions 33 (33a to 33f) are step-driven by a stepping drive motor or the like (not shown).

  A plurality of detection sensors 37a, 37b, 37c, and 39d for detecting jamming of a sheet conveyed on the conveyance path 41, that is, a conveyance stop of the sheet, are disposed in the conveyance path 41 in a distributed manner. A detection unit 37 is formed, and individual detection information from the detection sensors 37 a to 39 d is output to the main control unit 15.

  The first detection unit 37 including the detection sensors 37a to 39d arranged in a distributed manner allows the sensors 37a to 39d on the conveyance path 41 to detect (ie, remain on) after the start of paper feeding (printing). If it is detected or not detected (ON) even after a certain time, it is detected as a jam, and individual detection information is output to the main control unit 15.

  Reference numeral 43 in FIG. 2 is a reversing conveyance unit that reverses the front and back sides of the sheet with the image transferred and fixed on one side to the registration roller 33b for double-sided printing, and similarly forms the printing unit 25. .

  One or a plurality of paper discharge trays 45 on which the paper printed by the printing unit 25 is discharged are arranged on the upper side surface of the main body case 29.

  Above the main body case 29, the image reading unit 17 and the operation panel unit 23 described above are arranged, and the main control unit 15, the communication unit 19, and the storage unit 21 place electronic circuits at appropriate positions inside the main body case 29. Formed and arranged.

  The feed roller 33a, the registration roller 33b, the transfer roller 33c, the pressure rollers 33d and 33f, the fixing roller 33e, and other roller portions 33 and the first detection portion 37 positioned on the conveyance path 41 are illustrated in an easy-to-understand manner. Then, a simplified diagram as shown in FIG. 3 is obtained. In FIG. 3, the roller unit 33 and the like are extracted from the printing unit 25 and illustrated.

  An image forming unit 21 in the drawing develops and converts print data into image data and forms a toner image on the transfer roller 33c, and the toner image is transferred onto a sheet.

  Returning to FIG. 1, the second detection unit 27 is a mechanical or electronic switch that detects an opening / closing operation (on / off) of the opening / closing door 53 of FIG. 4 to be described later in order to operate the inside of the main body case 29. This corresponds to the switch SW of FIG. 6 described above. The second detection unit 27 detects the closed state of the door 53, detects the open state of the door 53 by detecting the open state of the door 53, and the image forming apparatus operates when the door 53 is on. It is supposed to be.

  The main control unit 15 includes a CPU, a memory unit that stores a startup program for the CPU, and an input / output interface (none of which are shown). The image reading unit 17, the communication unit 19, the storage unit 21, and the operation described above. In addition to controlling the panel unit 23 and the printing unit 25, it has the following functions.

  That is, when the first detection unit 37 detects a paper jam on the conveyance path 41, the main control unit 15 controls the apparatus to stop and displays guidance information 31 indicating a procedure for removing the jammed paper on the display panel. When the second detection unit 23 detects the opening / closing operation of the door 53, the roller unit 33 (33a to 33f) located near the jammed paper is driven for a predetermined period. It functions as a display drive control unit (drive control unit) 47 to be controlled.

  As an example of a display screen on the operation panel unit 23, in addition to an operation display (not shown), for example, as shown in FIG. 4, “1. Open the left door”, “2. Remove paper” and As shown in “3. Close the left door”, when the paper is jammed, the procedure for operating the door 53 corresponding to the door 1 shown in FIG. 6 is shown as a procedure for removing the jammed paper. There are the guidance information 31 and the display of the outer shape 51 of the apparatus.

  When the conveyance paper is jammed, the guidance information 31 and the outer shape 51 of the apparatus are shown, and the stop position J of the jammed paper is displayed in the outer shape 51 of the apparatus, for example, in a dot shape. ing.

  Further, the display drive control unit 47 performs an opening / closing operation in which the second detection unit 27 includes an opening operation of the opening / closing door 53 and a subsequent closing operation in a state where the first detection unit 37 detects a paper jam. When detected, the drive motors of the registration roller 33b, transfer roller 33c or fixing roller 33e located on the jammed paper are individually controlled to rotate in the paper transport direction for a preset short period (for example, about several seconds). It has a function.

  That is, the display drive control unit 47 counts the opening or closing operation of the open / close door 53 and compares the count value with a predetermined set number of times value, for example, the number of times “2”, and the count value becomes equal to or larger than the set value. When there is an instruction to move the jammed paper, the registration roller 33b, the transfer roller 33c, or the fixing roller 33e is restarted.

  The display drive control unit 47 also has a function of returning the entire apparatus to the ready state by performing return control of the apparatus from the jam state when the jammed paper is removed and the jam is no longer detected.

  Next, the operation of the sheet conveying apparatus according to the present invention will be briefly described with reference to the flowchart of FIG. Since the operation on the main control unit 15 side and the operation on the printing unit 25 side are executed in parallel, the main control unit 15 side and the printing unit 25 side will be described separately.

First, for the sake of convenience, the printing unit 25 side will be described.
When the program is started, the first detection unit 37 monitors whether or not a jam occurs on the sheet being conveyed in step S1, and when the jam is detected and step S1 becomes YES, the process proceeds to step S2, and in step S2, the first is detected. 1 detection unit 37 notifies the main control unit 15 of the occurrence of a jam (jam information), and proceeds to step S3.

  In step S3, the display drive unit 47 determines whether or not the open / close door 53 is in an open state, and waits until the open state is reached and step S3 becomes YES.

  When the opening / closing door 53 is opened and step S3 is YES, the process proceeds to step S4. In step S4, the display drive unit 47 determines whether the opening / closing door 53 is closed. Wait until YES.

  When the opening / closing door 53 is closed and an opening / closing operation of the opening / closing door 53 is detected, step S4 becomes YES, and the process proceeds to step S5, where the display driving unit 47 determines whether or not the jammed state is released.

  If the jammed state is not released and step S5 is NO, the process proceeds to step S6, and if a drive request for the roller A (for example, the transfer roller 33c and the pressure roller 33d) is issued from the main control unit 15 side, the step is performed. In S6, the roller A is rotationally driven, and the process proceeds to Step S7.

  In step S7, the display drive control unit 47 counts the opening / closing of the open / close door 53 and determines whether the count value is 2 or more. If it is less than 2 and step S7 is NO, the process returns to step S3, and step S7. Repeat until becomes YES.

  When the open / close count value of the open / close door 53 becomes 2 or more and step S7 becomes YES, the display drive control unit 47 slightly drives the roller A (for example, the transfer roller 33c and the pressure roller 33d) for a predetermined period in step S8. Return to step S3.

  On the other hand, if the jam state is canceled and step S5 becomes YES, the count of the door 53 is cleared in step S9, the process proceeds to step S10, the jam information is updated in step S10, and the jam is transferred to the main control unit 15 side. Output release information and exit.

Next, the operation on the main control unit 15 side will be described.
The main control unit 15 waits for jam information from the printing unit 25 in step S20. When the jam information is notified, the display drive control unit 47 operates guidance information based on the jam information in step S20. If it is displayed on the panel unit 23 (see FIG. 4) and the jam clearing information is obtained from the printing unit 25 side, the ready screen is displayed in step S21 and the process ends.

  As described above, in the present invention, the paper is transported by the plurality of roller portions 33 (33a to 33f) arranged in the transport path 41 for transporting the image forming paper fed from the paper feed stage 39. The first detection process is performed for the jam of the paper on the conveyance path 41, the second detection process is performed for the opening / closing operation of the open / close door 53 that is opened / closed from the outside in order to operate the inside of the apparatus, and the first detection process. When the second detection process detects the opening / closing operation of the open / close door 53 in the state where the jam of the paper is detected, the roller unit 33 (33a to 33f) located on the jammed paper is driven to jam. The paper is moved.

  These processes are executed by the paper conveyance program according to the present invention.

  As described above, in the sheet conveying device of the image forming apparatus according to the present invention, a plurality of image forming sheets fed from the sheet feeding stage 39 are distributed in the conveying path 41 for conveying the sheets. The roller unit 33, a first detection unit 37 that detects a jam of the paper on the conveyance path 41, and a second detection that detects the opening / closing operation of the open / close door 53 that is opened / closed from the outside in order to operate the inside of the apparatus. When the second detection unit 27 detects the opening / closing operation of the open / close door 53 in a state where the unit 27 and the first detection unit 37 detect the jam of the sheet, the roller unit 33 positioned on the jammed sheet is displayed. And a drive control unit 47 that controls the drive only for a predetermined period.

  Therefore, as a result of jamming and stopping of the paper on the conveyance path, the opening / closing door 53 is opened twice in succession, for example, by closing the opening / closing door 53 as a jam release operation, even if the opening / closing door 53 is opened and the important point cannot be taken out. If the opening / closing operation is performed, the jammed paper can be moved again by the roller section 33 (33a to 33f) and moved to a position where it can be easily removed. improves.

  When the jammed paper is removed and the jam is no longer detected, the device is returned from the jammed state, so that the return operation is simplified and the operability is improved.

  In addition, when the guidance information 31 indicating the procedure for returning the apparatus from the jammed state of the paper is displayed and the opening / closing operation of the open / close door 53 in the displayed guidance information 31 is detected, the roller unit 33 (33a to 33a ~). 33f) is controlled so that the opening / closing operation of the opening / closing door 53 can be performed based on the display, and an operation error is unlikely to occur. Similarly, the operability is improved.

  By the way, in the paper conveying apparatus of the present invention, the drive control is performed by the roller unit 33 (33a to 33f) by the two consecutive operations of opening and closing the opening / closing door 53 as the jam release operation. It is not limited to.

  For example, if the roller unit 33 (33a to 33f) is driven when a combination of opening and closing operations of the opening and closing door 53 is detected a plurality of times, the opening and closing door 53 can be opened and closed for purposes other than the jam release operation. It is difficult to re-drive the roller unit 33 (33a to 33f), and it is difficult for an operation error to occur, thereby improving operability.

  Further, after the roller portion 33 (33a to 33f) is driven for a predetermined period, when the opening / closing operation of the opening / closing door 53 is detected again, the roller portion 33 (33a to 33f) is again driven and controlled. If the sheet cannot be removed even after starting 33 (33a to 33f), it is possible to re-drive the roller 33 (33a to 33f) by moving the opening / closing door 53 to move the sheet. Similarly, operability is improved.

  In the present invention, the roller portion 33 (33a to 33f) positioned on the jammed paper is in the roller portion 33 (33a to 33f) that is in contact with the jammed paper and the jammed paper is conveyed (downstream). Thus, the roller portion 33 (33a to 33f) close to the paper is included.

  Note that the image forming apparatus A of the present invention can be implemented in an image forming apparatus such as a copying machine, a facsimile machine, or a multifunction machine.

1 is a schematic block diagram illustrating an example of an image forming apparatus equipped with a paper conveying device of the present invention. It is a schematic block diagram which shows the image forming apparatus of FIG. It is the schematic explaining the paper conveying apparatus which concerns on this invention. It is a figure explaining the example of a display of the operation panel part in this invention. 6 is a flowchart for explaining the operation of the sheet conveying apparatus of the present invention. 1 is a schematic perspective view illustrating a general appearance of an image forming apparatus.

Explanation of symbols

1 Opening / closing door 3 Body case (image forming device body case)
5 Toner container 7 Document holding 9 Printing unit 11 Operation unit 13 Display unit 15 Main control unit 17 Image reading unit 19 Communication unit 21 Storage unit 23 Operation panel unit (display unit, input unit)
25 Printing unit 27 Second detection unit 29 Main body case 31 Guidance information 33 Roller unit 33a Paper feed roller (roller unit)
33b Registration roller (roller part)
33c Transfer roller (roller)
33d, 33f Pressure roller (roller part)
33e Fixing roller (roller)
35 Image forming unit 37 First detection unit 37a, 37b, 37c, 37d Sensor 39 Paper feed stage 41 Transport path 43 Reverse transport unit 45 Paper discharge tray 47 Display drive control unit (drive control unit)
51 Outline Shape of Device 53 Opening / Closing Door A Image Forming Device (Multifunction Device)
J Stop position P Paper equivalent image SW switch (second detection unit)

Claims (11)

A plurality of roller units dispersedly arranged for transporting the paper in a transport path for transporting the paper for image formation fed from the paper feed stage;
A first detection unit for detecting a jam of the paper on the conveyance path;
A second detection unit for detecting an opening / closing operation of an opening / closing door that is opened / closed from the outside in order to operate the inside of the device;
When the first detection unit detects a jam of the paper and the second detection unit detects an opening / closing operation of the open / close door, the roller unit positioned on the jammed paper is driven and controlled for a predetermined period. A drive control unit,
A sheet conveying device for an image forming apparatus. The sheet conveying device of the image forming apparatus according to claim 1, wherein when the jammed sheet is removed and the jam is no longer detected, the drive control unit controls the apparatus to return from the jam state. 3. The sheet conveying device of the image forming apparatus according to claim 1, wherein the drive control unit drives the roller unit when the second detection unit detects the opening / closing operation a plurality of times. The drive control unit drives and controls the roller unit again when the second detection unit detects the opening / closing operation again after driving the roller unit for the predetermined period. A sheet conveying device of the image forming apparatus. A display unit that displays guidance information indicating a procedure for returning the apparatus from the jammed state of the paper; and the drive control unit performs an opening / closing operation of the opening / closing door in the guidance information displayed on the display unit. The sheet conveying device of the image forming apparatus according to claim 1, wherein when the second detection unit detects, the roller unit is driven and controlled. A transport process for transporting the paper by a plurality of roller units distributed in a transport path for transporting the image forming paper fed from the paper feed stage;
A first detection process for detecting a jam of the paper on the conveyance path;
A second detection process for detecting an opening / closing operation of an opening / closing door that is opened / closed from the outside in order to operate the inside of the apparatus;
When the second detection process detects an opening / closing operation of the opening / closing door in a state in which the jam of the sheet is detected in the first detection process, the roller unit positioned on the jammed sheet is driven for a predetermined period. Drive control processing to control,
A sheet conveying method for an image forming apparatus. 7. The sheet conveying method for an image forming apparatus according to claim 6, wherein the drive control process performs return control of the apparatus from the jam state when the jammed sheet is removed and the jam is no longer detected. 8. The sheet conveying method for an image forming apparatus according to claim 6, wherein the drive control process drives the roller unit when the second detection process detects the opening / closing operation a plurality of times. 9. The drive control process according to claim 6, wherein, after the roller unit is driven for the predetermined period, the roller unit is driven again when the second detection process detects the opening / closing operation. A sheet conveying method of the image forming apparatus. A display process for displaying guidance information indicating a procedure for returning the apparatus from the jammed state of the paper, and the drive control process includes an opening / closing operation of the open / close door in the guidance information displayed by the display process. The sheet conveying method for an image forming apparatus according to claim 6, wherein when the second detection process is detected, the roller unit is driven and controlled. For a control computer that controls conveyance of the paper by a plurality of roller units distributed in a conveyance path that conveys the paper for image formation that is fed from the paper feed stage,
A first detection process for detecting a jam of the paper on the conveyance path;
A second detection process for detecting an opening / closing operation of an opening / closing door that is opened / closed from the outside in order to operate the inside of the apparatus;
When the second detection process detects an opening / closing operation of the opening / closing door in a state in which the jam of the sheet is detected in the first detection process, the roller unit positioned on the jammed sheet is driven for a predetermined period. Drive control processing to control,
A sheet conveying program for an image forming apparatus.

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