JP2009020299A - Image forming apparatus and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a recording medium where normal image formation is performed and an unnecessary recording medium from being mixed in simple constitution. <P>SOLUTION: It is determined whether a detection signal from a paper delivery sensor is on, and thereby it is determined whether the paper delivery sensor detects a carried paper sheet (300). When it is determined that the carried paper is detected, the time of a timer on which a predetermined time is preset is subtracted in every unit time, and thereby it is determined whether the predetermined time elapses (S302). When it is determined that the predetermined time elapses, a paper feed roller, a carrying roll, a register roller and a paper delivery are controlled so that carrying for all of paper sheets in a carrying path is stopped (S304). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image forming apparatus and a program.

Conventionally, for example, after a transport error such as a jam occurs, a remaining sheet (scratch sheet) staying on the paper transport path when the sheet causing the paper jam is removed is selected from a plurality of paper discharge trays. 2. Description of the Related Art A printing apparatus that discharges to a paper discharge tray is known (see, for example, Patent Document 1). As a result, it is possible to prevent paper that has been printed normally and remaining paper from being mixed.
Japanese Patent Laid-Open No. 11-292389

  An object of the present invention is to provide an image forming apparatus and a program that can prevent a recording medium on which normal image formation has been performed with a simple configuration and an unnecessary recording medium from being mixed.

  In order to achieve the above object, an image forming apparatus according to a first aspect of the present invention includes an image forming unit that forms an image on a recording medium based on image data, and a recording medium on which an image is formed by the image forming unit. On the basis of a detection result of the detection means, a detection means for detecting a predetermined error of the recording medium conveyed by the conveyance means, a conveyance means for conveying the recording medium to a storage unit in which the recording medium is accumulated, And a control unit that conveys the recording medium so that a part of the recording medium is exposed to the storage unit.

  In order to achieve the above object, an image forming apparatus according to a second aspect of the present invention includes an image forming unit that forms an image on a recording medium based on image data, and an image is formed by the image forming unit. Conveying means for conveying the recording medium to an accumulating unit in which the recording medium is stored, detecting means for detecting a predetermined error of the recording medium conveyed by the conveying means, and recording during conveyance by the conveying means by the detecting means Stop means for stopping conveyance of the recording medium by the conveyance means when a medium conveyance error is detected, and whether or not a predetermined recording medium is removed after conveyance of the recording medium is stopped by the stopping means. A determination unit for determining, and when the determination unit determines that the predetermined recording medium has been removed, a portion of the recording medium stays in the conveyance path. Configured to have a control means for conveying to a state exposed to the storage portion.

  In order to achieve the above object, an image forming apparatus according to a third aspect of the present invention is the image forming apparatus according to the second aspect of the present invention, wherein the determination means records in order to eliminate the generated error. It is configured to determine that a predetermined recording medium has been removed when a process for removing the medium is performed, or when a process for removing the recording medium exposed from the discharge port provided in the conveyance path is performed. .

  In order to achieve the above object, an image forming apparatus according to a fourth aspect of the present invention is the image forming apparatus according to the third aspect, wherein the recording medium is removed to eliminate the generated error. Is reset after removing the recording medium in order to eliminate the error that has occurred, if there is a request for image formation after removing the recording medium to eliminate the error that has occurred, and In order to eliminate an error that has occurred, the recording medium is removed, and then the cover that has been opened to remove the recording medium is closed.

  In order to achieve the above object, an image forming apparatus according to a fifth aspect of the present invention is the image forming apparatus according to the first aspect, wherein the control means transports the recording medium by the detecting means. When a possible error is detected, the recording medium subject to the error is transported so that a part of the recording medium is exposed to the storage unit.

  In order to achieve the above object, according to a sixth aspect of the present invention, there is provided an image forming apparatus according to the fifth aspect, wherein the detecting means is conveyed by the conveying means. It is configured to detect an error in which the size of the medium is different from a size set for forming an image, or an error in which an image formed on the recording medium is deviated from a normal position.

  In order to achieve the above object, an image forming apparatus according to a seventh aspect of the present invention is the image forming apparatus according to any one of the first to sixth aspects, wherein the control means includes: The recording medium is conveyed so that a part of the recording medium is exposed to the storage unit, and then reversely conveyed in a direction opposite to the conveying direction of the recording medium.

  In order to achieve the above object, an image forming apparatus according to an eighth aspect of the present invention is the image forming apparatus according to any one of the first to seventh aspects, wherein the control means includes: The exposure amount exposed to the storage unit of the recording medium is changed according to the paper size of the recording medium.

  In order to achieve the above object, according to a ninth aspect of the present invention, in the image forming apparatus according to the first aspect, the control means is configured such that the detection means does not detect a predetermined error. The recording medium is transported at a lower transport speed than the transport speed of the transport means so that a part of the recording medium is exposed to the storage unit.

  In order to achieve the above object, according to a tenth aspect of the present invention, in the image forming apparatus according to the first aspect of the present invention, the image forming means is provided on the recording medium based on the image data. A toner image forming unit that forms a toner image; and a fixing unit that fixes the toner image formed on the recording medium by pressurizing and heating by the toner image forming unit. The recording medium is fixed at a pressure or heating amount lower than the pressing force or heating amount of the fixing unit when a predetermined error is not detected by the detection unit.

  In order to achieve the above object, a program according to claim 11 includes: a conveying step of conveying a recording medium on which an image based on image data is formed to a storage unit in which the recording medium is accumulated; A detection step of detecting a predetermined error of the recording medium conveyed by the conveyance step, and a state in which the recording medium is partially exposed to the storage unit based on a detection result detected by the detection step And a control step for transporting so that

  According to the image forming apparatus of the first aspect of the invention, there is an effect that it is possible to prevent a recording medium on which normal image formation has been performed with a simple configuration and an unnecessary recording medium from being mixed. .

  According to the image forming apparatus of the second aspect of the invention, it is possible to prevent a recording medium on which normal image formation has been performed with a simple configuration and a recording medium staying in the conveyance path from being mixed. Is obtained.

  According to the image forming apparatus of the third aspect of the invention, it is possible to obtain an effect that it is possible to determine that the recording medium has been removed in order to eliminate the generated error with a simple configuration.

  According to the image forming apparatus of the fourth aspect of the present invention, there is an effect that it is possible to determine the case where the processing for removing the recording medium is performed in order to eliminate the generated error with a simple configuration.

  According to the image forming apparatus of the fifth aspect of the invention, it is possible to prevent a recording medium on which normal image formation has been performed with a simple configuration and a recording medium subject to error from being mixed. Is obtained.

  According to the image forming apparatus of the sixth aspect of the invention, it is possible to detect an error capable of transporting the recording medium with a simple configuration.

  According to the image forming apparatus of the invention of claim 7, it is easier to connect the recording medium on which normal image formation has been performed and the recording medium staying in the conveyance path, compared to the case where the present configuration is not provided. The effect that it can distinguish is acquired.

  According to the image forming apparatus of the invention of claim 8, it is possible to more easily distinguish between a recording medium on which normal image formation has been performed and an unnecessary recording medium, as compared with the case where the present configuration is not provided. The effect that it can be obtained.

  According to the image forming apparatus of the ninth aspect of the present invention, it is possible to reduce the possibility of a transport error when transporting an unnecessary recording medium as compared with the case where the present configuration is not provided. Is obtained.

  According to the image forming apparatus of the tenth aspect of the present invention, there is a problem of contamination due to scattering of unfixed toner when removing an unnecessary recording medium while saving energy as compared with the case where the present configuration is not provided. Can be reduced.

  According to the program of the invention of claim 11, it is possible to prevent a recording medium on which normal image formation has been performed with a simple configuration and an unnecessary recording medium from being mixed.

  Hereinafter, an embodiment of an image forming apparatus of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
As shown in FIGS. 1 and 2, an image forming apparatus 10 according to the first embodiment of the present invention includes a main controller 12, a controller 14, an image forming unit 16 as an image forming unit, and a recording medium. A paper transport unit 18 as a transport means for transporting paper, a display panel 20, an operation panel 22, a paper discharge sensor 24, a specific image position detection sensor 26, and a paper discharge sensor 28 for detecting paper as a recording medium. A stacker discharge sensor 30, various other sensors 32, a discharge port 34 provided on the exit side of the transport path, a stacker 36, and a paper cassette 40 storing paper 38 as a recording medium on which an image is formed. And has.

  The main controller 12 is connected to a display panel 20, an operation panel 22 that receives instructions from the user, and a controller 14, and the main controller 12 controls the entire image forming apparatus 10.

  The display panel 20 has a display device composed of an LCD or the like, and displays contents based on the input information on the display device.

  The image forming unit 16 includes a fixing device 48 including a photoconductor 42, a pressure roll 44, and a heating roll 46, and a transfer roll 50.

  The paper transport unit 18 includes a paper feed roll 54, transport rolls 56 and 58, a registration roll 60, and a paper discharge roll 62. These rolls 54 to 62 are arranged on the transport path for transporting the paper 38 from the paper cassette 40 to the discharge port 34.

  The controller 14 is a ROM 14a as a storage medium storing a program for executing a control processing routine, details of which will be described below, a program for executing paper exposure processing, a program for executing exposure processing, a program for executing various processing routines, and the like. The CPU 14b reads and executes the program from the ROM 14a, the RAM 14c for temporarily storing data, the HDD (hard disk drive) 14d, and a microcomputer including an I / O (input / output) port 14e. The recording medium for storing the program executed by the CPU 14b is not limited to the ROM 14a. For example, although not shown, a portable recording medium such as a DVD disk, a magneto-optical disk, and an IC card, a management server, etc. It may be a storage device such as an HDD provided outside via a line, or may be a database connected via a line, another computer system, or a transmission medium on the line. Therefore, it is possible not only to provide a program according to an embodiment of the present invention to be described later by a communication medium but also to store and provide it on a portable recording medium such as a CD-ROM.

  The ROM 14a, CPU 14b, RAM 14c, HDD 14d, and I / O port 14e are connected to each other via a bus 14f. A paper discharge sensor 24, a specific image position detection sensor 26, a paper discharge sensor 28, a stacker discharge sensor 30, and various other sensors 32 are connected to the I / O port 14 e of the controller 14. Further, the I / O port 14e of the controller 14 is connected to a photosensitive member 42, a pressure roll 44, a heating roll 46, a transfer roll 50, a paper feed roll 54, and a driving unit (not shown) for driving each of them. The transport rolls 56 and 58, the registration roll 60, and the paper discharge roll 62 are connected.

  The paper discharge sensor 28 includes a photo sensor, is disposed between the paper feed roll 54 and the transport roll 56, and detects the presence or absence of the paper 38 fed by the paper feed roll 54. The specific image position detection sensor 26 includes a photo sensor, and detects the presence or absence of the paper 38 and a predetermined image of a predetermined size formed at a predetermined position on the paper 38. The paper discharge sensor 24 includes a photo sensor, and detects the presence or absence of the paper 38 that is conveyed from the image forming unit 16 to the paper discharge roll 62. The stacker discharge sensor 30 includes a photo sensor, and detects the presence or absence of a sheet 38 that passes through the discharge port 34.

  The controller 14 executes a recorded program and outputs information inputted from the main controller 12, the paper discharge sensor 24, the specific image position detection sensor 26, the paper discharge sensor 28, the stacker discharge sensor 30, and various other sensors 32. Based on this, the photosensitive member 42, the pressure roll 44, the heating roll 46, the transfer roll 50, the paper feed roll 54, the transport rolls 56 and 58, the registration roll 60, and the paper discharge roll 62 are controlled.

  The CPU 14 b of the controller 14 receives image data input from an image reading unit (not shown) for reading an image such as a document or an external terminal device (not shown) connected to the image forming apparatus 10 via the main controller 12. When an instruction to form an image on the paper 38 (print processing instruction) is input based on this, a program for forming an image on the paper 38 based on the input image data is read from the ROM 14a and the processing routine is executed. . At this time, the photoconductor 42, the pressure roll 44, the heating roll 46, the transfer roll 50, the paper feed roll 54, the transport rolls 56 and 58, the registration roll 60, and the paper discharge roll 62 are controlled by the controller 14, for example, Behaves like

  The paper feed roll 54 takes out the uppermost paper 38 in the paper cassette 40 and feeds the paper 38 from the paper cassette 40, and the transport roll 56 removes the paper 38 fed by the paper feed roll 54 from the registration roll 60. Transport to.

  The registration roll 60 corrects the conveyance posture of the sheet 38 based on the control of the controller 14 and conveys the sheet 38 to the image forming unit 16.

  The image forming unit 16 forms an image based on the image data on the paper 38 conveyed by the registration roll 60, and conveys the paper 38 on which the image is formed to the paper discharge roll 62. Specifically, a toner image based on the image data is formed on the photoconductor 42, the formed toner image is transferred to the paper 38 by the transfer roll 50, and the paper 38 on which the toner image is transferred is heated by the fixing device 48. While being heated by the roll 46 and pressurized by the pressure roll 44 and the heating roll 46, and the paper 38 is conveyed by the conveyance roll 58, the paper 38 on which an image is formed is conveyed to the paper discharge roll 62.

  The paper discharge roll 62 conveys the paper 36 so that the paper 38 conveyed from the image forming unit 16 is discharged from the discharge port 34.

  At this time, the printed paper 38 is stored in the stacker 36 as a storage unit for storing the paper 38.

  Next, a control processing routine performed by the CPU 14b of the controller 14 will be described with reference to FIG. In the present embodiment, this control processing routine is performed when the main controller 12 notifies that an error has occurred, or the paper discharge sensor 24, the specific image position detection sensor 26, the paper discharge sensor 28, and the stacker discharge sensor. 30 and when it is determined that an error has occurred from the detection signals of the various sensors 32.

  Regarding the error that occurs, an error in which the size of the paper 38 being conveyed to form an image is different from the size set to form an image, an error in which the image formed on the paper 38 deviates from the normal position, In addition, since a conveyance error (for example, a paper jam error) of the paper 38 in the middle of conveyance can be considered, an example in which these errors occur will be described below.

  Note that it is determined that an error has occurred in which the size of the paper 38 being conveyed for forming an image is different from the size set for forming the image. The time from the detection time to the time when the rear end portion of the paper 38 is detected is calculated as the time when the paper 38 passes the paper discharge sensor 28, and the paper feed roll 54 sends out the calculated time and the conveyance speed of the paper 38. The size of the sheet 38 is calculated, and the size of the calculated sheet 38 and the specified sheet size included in the input image forming process (printing process) instruction or the sheet previously set in the image forming apparatus 10 are calculated. This is done by comparing the size.

  In addition, it is determined that an error has occurred in which the image formed on the paper 38 is shifted from the normal position. An image of a predetermined character having a predetermined size formed at a predetermined position at the time of image formation is formed on the paper 38. The detection signal from the specific image position detection sensor 26 in advance (for example, when a character “1” having a predetermined size formed in the first row of the paper 38 is formed) and the HDD 14d in advance. This is performed by estimating whether or not the formed image is formed at a normal position based on the stored predetermined pattern.

  Further, it is determined that a conveyance error (for example, a paper jam error) has occurred in the paper 38 in the middle of conveyance within a predetermined time (for example, 300 msec) from the time when the paper discharge sensor 28 detects the rear end portion of the paper 38. If the specific image position detection sensor 26 does not detect the leading edge of the paper 38, it is determined by determining that a conveyance error has occurred.

  First, in step 102, the image forming unit is configured to stop image formation by performing control to stop exposure to the photoconductor 42, control of the transfer roll 50 so as not to transfer the toner image, and the like. 16 is controlled.

  In the next step 104, it is determined whether or not all the paper 38 existing in the transport path can be transported by the paper transport unit 18. In other words, if the error that has occurred is an error in which the size of the paper 38 being conveyed is different from the size set for forming an image, or an error in which the image formed on the paper 38 deviates from the normal position, affirmative. On the other hand, if the error detected in step 102 is a paper jam error, a negative determination is made.

  If the determination in step 104 is affirmative, in the next step 106, the content of the error that has occurred and an instruction to display the content of the error on the display panel 20 are output to the main controller 12.

  In the next step 108, paper exposure processing is executed.

  The control routine for this sheet exposure process will be described with reference to FIG. 4. In step 200, it is determined whether or not there is a sheet 38 (remaining sheet) existing in the transport path. In step 200, for example, when the presence of the paper 38 can be detected by detection signals from the paper discharge sensor 24, the specific image position detection sensor 26, the paper discharge sensor 28, the stacker discharge sensor 30, and other various sensors 32. On the other hand, if the presence of the sheet 38 cannot be detected, a negative determination is made.

  If the determination in step 200 is affirmative, in the next step 202, the paper feed roll 54, the transport rolls 56 and 58, the registration roll 60, and so on are transported in the transport direction so as to transport all the sheets 38 existing in the transport path. The paper discharge roll 62 is controlled.

  In the next step 204, the exposure process shown in detail in FIG. 5 is executed.

  The exposure process routine will be described. In step 300, it is determined whether or not the detection signal from the paper discharge sensor 24 is turned on, and whether or not the paper 38 being conveyed is detected by the paper discharge sensor 24 is determined. Make a decision. If it is determined in step 300 that the conveyed paper 38 has been detected, in the next step 302, by performing a process of subtracting the time of the timer set for a predetermined time for each unit time, etc. It is determined whether or not a predetermined time has elapsed. The predetermined time can be set to, for example, 500 msec.

  If an affirmative determination is made in step 302, in the next step 304, the paper feed roll 54, the transport rolls 56 and 58, the registration roll 60, and the paper discharge roll are set so as to stop the transport of all the paper 38 existing in the transport path. 62 is controlled.

As a result of the processing in steps 300 to 304 described above, as shown in FIG. 6, the sheet 38 existing in the conveyance path is conveyed and a part of the sheet 38 is stopped in a state exposed from the discharge port 34 provided in the conveyance path. Is done. The length L of a part of the paper 38 exposed from the discharge port 34 is set to a length L desired by the user based on the conveyance speed of the paper 38, the distance L _S from the discharge sensor 24 to the discharge port 34, and the like. The time can be set by setting the timer in advance.

  Note that the predetermined time corresponds to the size of the paper, that is, for each size, for example, 200 msec for the A4 size paper 38 and 400 msec for the A3 size paper 38, and changes according to the size. May be.

  In the next step 206, it is determined whether or not the exposure process executed in step 204 is the first execution. Note that whether or not it is the first execution can be determined by a known method such as counting the number of times exposure processing is performed with a counter.

  If a negative determination is made in step 206, the process proceeds to the next step 212, and if a positive determination is made, in the next step 208, the paper 38 whose part is exposed from the discharge port 34 is removed. A prompt message and an instruction to display this message on the display panel 20 are output to the main controller 12. By outputting such a message and instruction to the main controller 12, for example, as shown in FIG. 7A, the display panel 20 indicates that “a part of the paper is exposed at the discharge port in a stopped state. Please remove all remaining sheets one by one. ”Is displayed.

  In the next step 210, control for reducing the pressure applied when the pressure roll 44 presses and control for stopping the heating when the heating roll 46 is heated are performed. Thus, as shown in FIG. 8 (A), the paper 38 that has been pressed by the pressure roll 44 and heated by the heating roll 46 is reduced in pressure and heated as shown in FIG. 8 (B). Is stopped.

  In step 210, either the control for reducing the pressurizing force when pressurizing with the pressurizing roll 44 or the control for stopping the heating when heating with the heating roll 46 may be performed. You may make it perform control similar to the normal movable state of the apparatus 10. FIG. Here, the normal movable state means a state where no error has occurred.

  In the next step 212, it is determined whether or not the detection signal from the stacker discharge sensor 30 has changed from the on state to the off state, so that the paper 38 partially exposed from the exposure port 34 is the user 38. It is determined whether or not it has been extracted. If it is determined in step 212 that the paper 38 has been extracted by the user, the process returns to step 200 described above, and the subsequent processing is executed again.

  On the other hand, if a negative determination is made in step 200, in the next step 214, a message indicating that all the remaining paper 38 at the time of the error has been removed and an instruction to display this message on the display panel 20 are given. Output to the main controller 12.

  In the next step 110, the pressing force of the pressure roll 44 whose pressing force is reduced becomes the pressing force in the normal movable state of the image forming apparatus 10, and the heating of the heating roll 46 whose heating is stopped is the image forming apparatus 10. By controlling so that the heating in the normal movable state is performed, control is performed on each of the devices in the image forming unit 16 and the sheet conveying unit 18 so that the image forming apparatus 10 is in the normal movable state. This control processing routine is completed.

  On the other hand, if a negative determination is made in step 104, in the next step 112, control is performed to stop the conveyance of all the sheets 38 existing on the conveyance path.

  In the next step 114, the content of the error that has occurred and an instruction to display the content of this error on the display panel 20 are output to the main controller 12.

  In the next step 116, it is determined whether or not a process for removing the paper 38 has been performed in order to eliminate the generated error. In step 116, when the user presses a panel indicating reset on the operation panel 22 after the paper 38 is removed to eliminate the generated error, a reset signal is sent via the main controller 12. Then, it is determined that the process of removing the paper 38 has been performed in order to eliminate the generated error.

  In step 116, when the sensors of the various sensors 32 detect that the cover (not shown) opened to remove the paper 38 is closed after the paper 38 is removed to eliminate the generated error. Further, it may be determined that the process of removing the paper 38 has been performed in order to eliminate the generated error.

  Further, in step 116, when an image formation request is made from the operation panel 22 or the like after the paper 38 is removed in order to eliminate the error that has occurred, the paper is used to eliminate the error that has occurred. It may be determined that the process of removing 38 has been performed.

  In the next step 118, the device initialization process, which is an initialization process when an error occurs, is performed. In the initialization process, a cleaning process for the photosensitive member 42 of the image forming unit 16 and a clearing process for various counters used when the image forming apparatus 10 operates are performed.

  After the initialization process, in step 108, the paper exposure process described above is executed.

  As described above, when the user removes the first sheet 38 from the discharge port 34 by the control process, the sheet exposure process, and the exposure process, a part of the second remaining sheet 38 is discharged. It becomes a state exposed from the exit 34, and all the remaining sheets existing in the transport path can be removed.

  In the present embodiment, when the main controller 12 notifies that an error has occurred, or the paper discharge sensor 24, the specific image position detection sensor 26, the paper discharge sensor 28, the stacker discharge sensor 30, and various sensors 32. Although an example has been described in which a control processing routine is executed when it is determined that an error has occurred from this detection signal, and a part of the paper 38 is exposed from the discharge port 34, the present invention is not limited to this. For example, when an error is notified from the main controller 12, or an error is detected from detection signals of the paper discharge sensor 24, the specific image position detection sensor 26, the paper discharge sensor 28, the stacker discharge sensor 30, and various sensors 32. When it is determined that an error has occurred, each of the devices in the image forming unit 16 and the paper transport unit 18 is transported at a transport speed that is lower than the transport speed when no error has occurred. Then, control may be performed to execute a control processing routine. As a result, the paper 38 is transported at a transport speed that is lower than the transport speed when no error has occurred, and a part of the paper 38 is exposed to the stacker 36.

[Second Embodiment]
Next, an image forming apparatus according to a second embodiment of the present invention will be described. Note that the description of the same configuration and the same processing as in the first embodiment will be omitted.

  In the present embodiment, the difference from the first embodiment is that in the first embodiment, the conveyance of the paper 38 is stopped in step 304 of the routine for performing the exposure process, as shown in FIG. Although an example in which a part of the remaining paper is exposed while stopped from the discharge port 34 has been described, in the present embodiment, as shown in FIG. The difference is that the paper discharge roll 62 and the like are controlled so that the remaining paper is reversely conveyed backward in the conveyance direction after being conveyed forward from the discharge port 34 in the conveyance direction. Accordingly, a part of the paper 38 is conveyed backward from the discharge port 38 of the image forming apparatus 80. In addition, you may comprise so that it may convey in the front direction again after conveying in the back direction, and this conveyance in the front-back direction may be repeated. In this case, as shown in FIG. 7B, the processing of step 208 of the routine for performing the paper exposure process causes the display panel 20 to “expose a part of the paper to the discharge port in a state of moving back and forth. So please remove all the remaining sheets one by one. ”Can be displayed.

[Third Embodiment]
Next, an image forming apparatus according to a third embodiment of the present invention will be described. Note that the description of the same configuration and the same processing as those in the first embodiment and the second embodiment will be omitted.

  In the present embodiment, the difference from the first embodiment is that in the first embodiment, the conveyance of the paper 38 is stopped in step 304 of the routine for performing the exposure process, as shown in FIG. Although an example in which a part of the remaining paper is exposed while being stopped from the discharge port 34 has been described, in the present embodiment, as shown in FIG. Is different in that the sheet discharge roll 62 and the like are controlled so as to be lower than the normal movable state. As a result, the conveyance speed of the paper 38 exposed from the discharge port 38 of the image forming apparatus 80 decreases, and after a predetermined time has elapsed in step 302, the paper 38 stops in step 304.

[Fourth Embodiment]
Next, an image forming apparatus according to a fourth embodiment of the present invention will be described. In addition, description is abbreviate | omitted about the structure similar to 1st Embodiment, 2nd Embodiment, and 3rd Embodiment, and the same process.

  In the present embodiment, as shown in FIG. 11, the photo sensor 42 and the transfer roll 50 of the image forming apparatus are configured to include a photo sensor on the downstream side in the conveyance direction of the paper 38 to detect the presence or absence of the paper 38. A paper detection sensor 85 is provided. When the error described above occurs, in order to detect the paper 38 on which the toner image is transferred by the photoconductor 42 and the transfer roll 50 and the toner image is not fixed by the fixing device 48, the photoconductor 42 and the transfer roll The presence of the sheet 38 positioned downstream of the sheet 50 in the conveyance direction of the sheet 38 and upstream of the fixing device 48 is detected by a detection signal from the sheet detection sensor 85. The detected paper 38 is pressed by the pressure roll 44 and heated by the heating roll 46 in step 304 or 306 of the routine for performing the exposure process, as shown in FIG. The pressure roll 44, the heating roll 46, the transport rolls 56, 58, the registration roll 60, and the paper discharge roll 62 so that a part thereof passes through the pressure roll 44 and the heating roll 46 and is exposed from the discharge port 34. To control. Note that it is possible to adopt a configuration in which the pressurization by the pressurization roll 44 and the heating by the heating roll 46 are reduced as compared with the normal movable state of the image forming apparatus 10.

It is the schematic which shows 1st Embodiment. FIG. 3 is a diagram showing functional blocks in the first embodiment. FIG. 3 is a flowchart of a control processing routine that is executed by the CPU of the image forming apparatus according to the first embodiment. FIG. 4 is a flowchart of a sheet exposure process routine that is performed by the CPU of the image forming apparatus according to the first embodiment. FIG. 5 is a flowchart of an exposure processing routine that is performed by the CPU of the image forming apparatus according to the first embodiment. FIG. 10 is a diagram for explaining that the sheet is stopped and a part of the sheet is exposed from the discharge port in the first embodiment. It is a figure which shows that the message which prompts to remove the paper which is the remaining paper at the time of error occurrence is displayed on the display panel. In 1st Embodiment, it is a figure which shows the result of having performed control which reduces the applied pressure at the time of pressurizing with respect to a pressure roll, and control which stops the heating at the time of heating with respect to a heating roll. FIG. 9 is a flowchart of an exposure processing routine that is performed by a CPU of an image forming apparatus according to a second embodiment. FIG. 10 is a flowchart of an exposure processing routine that is performed by a CPU of an image forming apparatus according to a third embodiment. It is the schematic which shows 4th Embodiment. In the fourth embodiment, when an error occurs, a toner image is transferred, and the entire paper on which the toner image is not fixed by the fixing device passes through the pressure roll and the heating roll, and a part of the paper is discharged from the outlet. It is a figure which shows that it is in the state exposed from.

Explanation of symbols

10 Image forming apparatus 14 Controller 14b CPU
24 Paper Discharge Sensor 26 Image Position Detection Sensor 28 Paper Discharge Sensor 30 Stacker Discharge Sensor 32 Other Various Sensors 44 Pressing Roll 46 Heating Roll 54 Paper Feeding Roll 56, 58 Conveyance Roll 60 Registration Roll 62 Paper Discharge Roll

Claims (11)

Image forming means for forming an image on a recording medium based on the image data;
Conveying means for conveying a recording medium on which an image is formed by the image forming means to a storage unit in which the recording medium is stored;
Detecting means for detecting a predetermined error of the recording medium conveyed by the conveying means;
Control means for transporting the recording medium based on the detection result of the detection means so that a part of the recording medium is exposed to the storage unit;
An image forming apparatus comprising: Image forming means for forming an image on a recording medium based on the image data;
Conveying means for conveying a recording medium on which an image is formed by the image forming means to a storage unit in which the recording medium is stored;
Detecting means for detecting a predetermined error of the recording medium conveyed by the conveying means;
Stop means for stopping conveyance of the recording medium by the conveyance means when the detection means detects a conveyance error of the recording medium in the middle of conveyance by the conveyance means;
Determining means for determining whether or not a predetermined recording medium has been removed after conveyance of the recording medium is stopped by the stopping means;
Control means for transporting the recording medium staying in the transport path so that a part of the recording medium is exposed to the storage unit when it is determined by the determination means that the predetermined recording medium has been removed;
An image forming apparatus comprising: The determination means includes
When a process for removing a recording medium is performed to eliminate an error that has occurred, or when a process for removing a recording medium that has been exposed from a discharge port provided in the transport path is performed, a predetermined recording medium is removed. The image forming apparatus according to claim 2, wherein the image forming apparatus determines that the image has been received.   When a process for removing the recording medium is performed to eliminate the generated error, the recording medium is used to eliminate the generated error when the recording medium is reset after removing the recording medium to eliminate the generated error. And at least one of a case where an open cover is closed to remove the recording medium after removing the recording medium in order to eliminate an error that has occurred. The image forming apparatus according to 3.   When the detection unit detects an error that the recording medium can be conveyed by the detection unit, the control unit conveys the recording medium subject to the error so that a part of the recording medium is exposed to the storage unit. The image forming apparatus according to claim 1.   The detection unit detects an error in which the size of the recording medium conveyed by the conveying unit is different from a size set for forming an image, or an error in which an image formed on the recording medium deviates from a normal position. The image forming apparatus according to claim 5.   The said control means carries out reverse conveyance in the reverse direction of the conveyance direction of the said recording medium, after conveying so that a part of said recording medium may be in the state exposed to the said accumulation | storage part. The image forming apparatus according to claim 6.   The said control means changes the exposure amount exposed to the said storage part of the said recording medium according to the paper size of the said recording medium, The any one of Claims 1-7 characterized by the above-mentioned. Image forming apparatus.   The control means is such that a part of the recording medium is exposed to the storage section at a lower conveying speed than the conveying speed by the conveying means when a predetermined error is not detected by the detecting means. The image forming apparatus according to claim 1, wherein the image forming apparatus is conveyed as described above. The image forming unit includes:
Toner image forming means for forming a toner image on the recording medium based on the image data;
Fixing means for fixing the toner image formed on the recording medium by pressing and heating the toner image forming means;
2. The fixing unit according to claim 1, wherein the fixing unit fixes the recording medium with a pressing force or heating amount lower than a pressing force or heating amount of the fixing unit when a predetermined error is not detected by the detecting unit. Image forming apparatus. A transport step for transporting a recording medium on which an image based on image data is formed to a storage unit in which the recording medium is stored;
A detecting step for detecting a predetermined error of the recording medium conveyed by the conveying step;
A control step of conveying the recording medium such that a part of the recording medium is exposed to the storage unit based on the detection result detected by the detection step;
A program that causes a computer to execute.

Images