JP2018159844A - Image forming apparatus and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming apparatus and a program that can stop conveyance of a sheet at a desired position on a sheet conveyance path, and enable a user to check an image formation state or a sheet conveyance state at the position.SOLUTION: In an image forming apparatus comprising an image forming part 40 that forms images on a sheet, a conveying part 70 that conveys the sheet, and a control part 81 that controls the conveyance of the sheet, the control part executes check and stop control of stopping the conveyance of the sheet under a predetermined stop condition for checking the sheet, and upon execution of the check and stop control, determines whether to execute residual sheet conveyance control of conveying a sheet remaining inside the image forming apparatus to a predetermined position according to the stop condition.SELECTED DRAWING: Figure 3

Description

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

  Conventionally, an electrostatic latent image formed on a photoreceptor is developed with toner to form a toner image, the formed toner image is transferred onto a sheet by a transfer roller, and the transferred toner image is sandwiched and conveyed by a fixing roller. An electrophotographic image forming apparatus that forms an image on a sheet by heat and fixing is known.

In such an image forming apparatus, when an image formation problem such as an image scratch, a roller mark, or a scratch scratch occurs, the operation of the image forming apparatus is performed at a predetermined timing in order to identify the problem occurrence point. Control to stop (hereinafter referred to as confirmation stop control) is performed (see, for example, Patent Document 1).
According to the confirmation stop control, after the image forming apparatus is stopped, by taking out the paper whose conveyance has been stopped from the image forming apparatus and checking the image forming state, it is possible to know whether or not a problem has occurred at the stop position of the paper. be able to. Then, by executing this for a plurality of locations in the image forming apparatus, it is possible to identify the location where the problem occurred.

  On the other hand, control (hereinafter referred to as JAM stop control) for stopping the operation of the image forming apparatus when a JAM such as a paper jam occurs is generally performed separately from the confirmation stop control. In JAM stop control, as disclosed in Patent Document 2, there is a technique of transporting to a predetermined position so that JAM paper remaining in the image forming apparatus can be easily removed.

JP2013-213981A JP 9-48539 A

  Here, in the confirmation stop control, if the same sheet conveyance as in the JAM stop control as described above is performed uniformly, the sheet stop position is conveyed to a position shifted from the position to be originally confirmed, which causes a problem. The location of the occurrence will be hindered.

  The present invention has been made in view of the above-described problem, and stops image conveyance at a desired position on a sheet conveyance path and can confirm an image forming state or a sheet conveyance state at the position. And to provide a program.

In order to achieve the above object, an image forming apparatus according to claim 1 is provided.
An image forming unit that forms a toner image on paper;
A transport unit for transporting paper;
An image forming apparatus comprising: a control unit that controls paper conveyance;
The controller is
Check stop control to stop paper transport under the specified stop conditions for paper check,
When the confirmation stop control is performed, it is determined whether or not to perform residual paper transport control for transporting the paper remaining in the image forming apparatus to a predetermined position according to the stop condition.

According to a second aspect of the present invention, in the image forming apparatus according to the first aspect,
A detection unit for detecting occurrence of JAM;
The controller is
When JAM is detected by the detection unit, JAM stop control is performed to stop paper conveyance,
The controller is
In the JAM stop control, when the detection unit detects JAM, the residual paper conveyance control is performed, and when the detection unit does not detect JAM, the confirmation stop control is performed. And

According to a third aspect of the present invention, in the image forming apparatus according to the first or second aspect,
The stop condition includes a first stop condition for confirming an image forming state and a second stop condition for confirming a sheet conveyance state,
The controller is
When the first stop condition is satisfied, it is determined that the residual paper transport control is performed, and when the second stop condition is satisfied, it is determined that the residual paper transport control is not performed. To do.

According to a fourth aspect of the present invention, in the image forming apparatus according to any one of the first to third aspects,
The controller is
When the residual paper conveyance control is performed, only a specific sheet in the image forming apparatus is conveyed to the predetermined position.

According to a fifth aspect of the present invention, in the image forming apparatus according to any one of the first to fourth aspects,
A determination unit that determines whether an instruction to perform the residual paper conveyance control from a user is input;
The controller is
If the determination unit determines that an instruction to perform the residual paper conveyance control is input, the residual paper conveyance control is performed even if the stop condition is a condition that the residual paper conveyance control is not performed. It is characterized by.

The program according to claim 6 is:
An image forming apparatus comprising: an image forming unit that forms a toner image on a sheet; and a conveyance unit that conveys the sheet.
Confirmation stop control is performed to stop the conveyance of the sheet under a predetermined stop condition for confirming the sheet. When the confirmation stop control is performed, the sheet remaining in the image forming apparatus is determined according to the stop condition. It is made to function as a control unit that determines whether or not to carry out the residual paper conveyance control for conveying to a predetermined position.

  According to the present invention, it is possible to provide an image forming apparatus and a program capable of stopping the conveyance of a sheet at a desired position on the sheet conveyance path and confirming the image forming state or the sheet conveying state at the position.

1 is a diagram illustrating a schematic configuration of an image forming apparatus according to the present invention. 2 is a block diagram illustrating a functional configuration of the image forming apparatus. FIG. It is a conceptual diagram of the stop position of a sheet. It is a figure which shows an example of the stop condition setting screen in confirmation stop control. It is a figure which shows an example of a stop condition parameter. It is a figure explaining the detail of a stop condition parameter. It is a flowchart which shows the paper conveyance operation | movement in embodiment to which this invention is applied. It is a flowchart which shows the operation | movement at the time of confirmation stop control implementation in embodiment to which this invention is applied.

[Embodiment]
An embodiment of an image forming apparatus 100 according to the present invention will be described. In the embodiment of the present invention, the color image forming apparatus 100 will be described as an example. However, the present invention is not limited to this, and can be applied to, for example, a monochrome image forming apparatus.

FIG. 1 is a schematic configuration diagram of the image forming apparatus 100.
The image forming apparatus 100 is an image forming apparatus that forms a color image by an electrophotographic method based on image data obtained by reading an image from a document or image data received from an external device.
The image forming apparatus 100 includes an operation unit 15, a display unit 20, a document reading unit 30, an image forming unit 40, a paper feeding unit 50, a post-processing unit 60, a conveyance unit 70, and the like.

  The operation unit 15 includes a touch panel formed so as to cover the display screen of the display unit 20 and various operation buttons such as numeric buttons and a start button, and an operation signal based on a user operation is transmitted to the control unit 81 (see FIG. 2). ).

  The display unit 20 is configured by an LCD (Liquid Crystal Display), and displays various screens according to instructions of display signals input from the control unit 81.

  The document reading unit 30 includes an ADF (automatic document feeder), a scanner, and the like, and outputs image data obtained by reading an image of the document to the control unit 81.

The image forming unit 40 forms an image on the paper supplied from the paper supply unit 50.
The image forming unit 40 includes photosensitive drums 41Y, 41M, 41C, and 41K corresponding to colors of yellow (Y), magenta (M), cyan (C), and black (K), an intermediate transfer belt 42, and a secondary transfer roller. 43, a fixing unit 44, an ADU reversing mechanism 45, a registration roller 46, and the like.

After the photoreceptor drum 41Y is uniformly charged, it is scanned and exposed with a laser beam based on yellow image data to form an electrostatic latent image. Then, yellow toner is attached to the electrostatic latent image on the photosensitive drum 41Y, and development is performed.
Since the photosensitive drums 41M, 41C, and 41K are the same as the photosensitive drum 41Y except that the handled colors are different, the description thereof is omitted.

The toner images of the respective colors formed on the photosensitive drums 41Y, 41M, 41C, and 41K are sequentially transferred onto the rotating intermediate transfer belt 42 (primary transfer). That is, on the intermediate transfer belt 42, a color toner image is formed by superimposing four color toner images.
The color toner images on the intermediate transfer belt 42 are collectively transferred onto the paper by the secondary transfer roller 43 (secondary transfer).

  The fixing unit 44 includes a fixing roller 441 that heats and pressurizes the sheet on which the color toner image is transferred, and fixes the color toner image on the sheet by heating and pressing.

  The image forming unit 40 includes an ADU reversing mechanism 45 that reverses the front and back of the sheet on which the fixing process has been performed by the fixing unit 44 and conveys the sheet to the secondary transfer roller 43. In the image forming apparatus 100, when images are formed on both sides of a sheet, the ADU reversing mechanism 45 reverses the front and back of the sheet to form images on both sides, and then the sheet is conveyed to the post-processing unit 60. When an image is formed only on one side of the paper, the paper on which the image is formed on one side is conveyed to the post-processing unit 60 without the paper being reversed by the ADU reverse mechanism 45.

  The secondary transfer roller 43, the fixing unit 44, the ADU reversing mechanism 45, and the registration roller 46 constitute an ADU transport unit 47, and the ADU transport unit 47 can be pulled out toward the front side of the sheet.

The paper feed unit 50 includes paper feed trays T <b> 1 to T <b> 3 and supplies paper to the image forming unit 40. In each of the paper feed trays T1 to T3, paper of a paper type and size predetermined for each paper feed tray is stored. The sheets stored in the sheet feeding trays T1 to T3 are sent to the image forming unit 40 by driving the sheet feeding motor.
Each of the paper feed trays T1 to T3 is provided so as to be able to be pulled out toward the front side of the paper, and the paper is replenished in a state where the paper feed trays T1 to T3 are pulled out.
Further, a vertical conveyance door 51 is provided on the side surface of the main body of the image forming apparatus 100 close to the vertical conveyance unit 71 so that the vertical conveyance door 51 can be opened and closed, and is stopped on the vertical conveyance unit 71 with the vertical conveyance door 51 opened. The removed paper can be taken out.

  The post-processing unit 60 discharges the paper on which the image has been formed by the image forming unit 40 to the paper discharge trays T <b> 11 and T <b> 12 or accumulates it in the large-capacity stacker 61. Other post-processing devices that perform post-processing such as sorting, stapling, punching, folding, and bookbinding may be connected as necessary.

The transport unit 70 includes transport rollers for transporting the paper on the paper transport path, and the paper stored in the paper feed trays T1 to T3 of the paper feed unit 50 is picked up by the paper feed trays T1 to T3. When the sheets are picked up one by one by a roller or the like, they are supplied to the image forming unit 40 by the vertical conveying unit 71 and the paper after the image formation is in the image forming apparatus 100 until the paper is conveyed to the paper discharge trays T11 and T12 or the large-capacity stacker 61. The paper is transported at.
As a transport roller, a main body discharge roller 72 is disposed on the paper transport path on the downstream side of the image forming unit 40, and a post-processing section carry-in roller 73 is disposed on the uppermost stream on the paper transport path of the post-processing section 60. . These rollers discharge the paper from the image forming unit 40 and carry the paper into the post-processing unit 60.

Further, the transport unit 70 includes a fixing paper discharge sensor SE1 and a main body paper discharge sensor SE2 on the paper transport path.
The fixing paper discharge sensor SE1 is a sensor disposed downstream of the fixing roller 441 and capable of detecting passage of paper. The fixing paper discharge sensor SE1 detects the presence or absence of paper in the fixing paper discharge sensor SE1, and outputs it to the control unit 81. As a result, the control unit 81 can detect the timing at which the leading edge of the paper passes through the fixing paper discharge sensor SE1.
The main body paper discharge sensor SE2 is a sensor that is disposed downstream of the image forming unit 40 and in the vicinity of the main body paper discharge roller 72 and can detect passage of paper. The main body paper discharge sensor SE2 detects the presence or absence of paper in the main body paper discharge sensor SE2, and outputs it to the control unit 81. As a result, the control unit 81 can detect the timing at which the leading edge of the sheet has passed through the main body discharge sensor SE2.
The fixing paper discharge sensor SE1 and the main body paper discharge sensor SE2 may use existing sensors in the image forming apparatus 100 such as a JAM detection sensor that can measure the passage time of the paper, and detect reflected light of the paper. It is good also as what is comprised with the reflection type optical sensor which does. In the present embodiment, JAM detection sensors are used as the fixing paper discharge sensor SE1 and the main body paper discharge sensor SE2.

FIG. 2 is a block diagram illustrating a functional configuration of the image forming apparatus 100.
As illustrated in FIG. 2, the image forming apparatus 100 includes an operation unit 15, a display unit 20, a document reading unit 30, an image forming unit 40, a paper feeding unit 50, a post-processing unit 60, a conveyance unit 70, a control unit 81, a storage unit. Unit 82, communication unit 83, and the like. Note that description of the functional units already described is omitted.

  The control unit 81 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The CPU reads various processing programs stored in the ROM in accordance with an operation signal input from the operation unit 15 or an instruction signal received by the communication unit 83, expands the program in the RAM, and displays an image according to the expanded program. The operation of each part of the forming apparatus 100 is centrally controlled.

  The storage unit 82 includes a storage unit such as a DRAM (Dynamic Random Access Memory) or a HDD (Hard Disk Drive) which is a semiconductor memory. The storage unit 82 receives image data acquired by the document reading unit 30 or externally via the communication unit 83. The image data input from is stored.

  The communication unit 83 transmits / receives data to / from an external device connected to a communication network such as a LAN (Local Area Network).

Next, residual paper conveyance control in this embodiment will be described.
FIG. 3 shows a conceptual diagram of the paper stop position.
When a JAM such as a paper jam occurs due to some factor during normal image formation, and the operation of the image forming apparatus 100 is stopped, when the paper stops at the position A shown in FIG. Therefore, the remaining paper cannot be taken out even if the vertical conveyance door 51 is opened. However, by pulling out the paper feed tray T1 to remove the residual paper, the residual paper is divided between the main body side transport path of the image forming apparatus 100 and the transport path on the paper feed tray T1 side. If the cut piece of paper remains in the main body of the image forming apparatus 100, it may cause the next JAM, or may cause mechanical damage if the paper is highly rigid.
Therefore, when the paper stops at the position as described above, the paper is completely sent out from the paper feed tray T1, or the paper is transported from the vertical transport door 51 to a position where the residual paper can be easily taken out, and then the image is displayed. The forming apparatus 100 is stopped.

Similarly, if the residual paper exists at the position B, the ADU transport unit 47 is pulled out to remove the residual paper, so that the residual paper is transferred to the transport path on the image forming apparatus 100 main body side and the transport path on the post-processing unit 60 side. Divided between.
Accordingly, when the sheet stops at the position B, similarly, the image forming apparatus 100 is stopped after the remaining sheet is conveyed by a certain distance so that the remaining sheet can be easily taken out from the post-processing unit 60 side.

  That is, in the present embodiment, when the JAM is detected and the image forming apparatus 100 is forcibly stopped, residual paper conveyance control is performed to convey the residual paper to a position where it can be easily taken out.

Next, the confirmation stop control in this embodiment will be described.
FIG. 4 shows an example of a stop condition setting screen in the confirmation stop control, and FIG. 5 shows an example of a stop condition parameter.
Confirmation stop control is performed to identify image formation problems such as image scratches, roller marks, scratch scratches, and paper transport problems such as JAM. Image formation is performed under stop conditions set by the user. By stopping the apparatus 100 and confirming the image state of the paper whose conveyance has been stopped, the user can identify the location where the problem has occurred.

  Parameter 1 indicates a stop type, and the image forming apparatus 100 is stopped at the timing shown in FIG. Specifically, the timing is as shown in FIG. For example, when “1” is selected as the parameter 1, the toner image drawn on the photosensitive drum 41 of the image forming unit 40 is transferred to the intermediate transfer belt 42, and the toner image is transferred to the secondary transfer roller 43. The image forming apparatus 100 is stopped immediately before the arrival. Although not shown, it is possible to set parameter 1 to “0”. When the parameter 1 is set to “0”, the stop timing is not set.

  Parameter 2 is the time set value [ms] from the starting point. That is, when parameter 2 is 0, the image forming apparatus 100 is stopped at the start point (timing when parameter 1 is reached), and when parameter 2 is other than 0, the image is set at the time set value [ms] from the start point. The forming apparatus 100 is stopped.

Here, when the set stop condition is detected and the image forming apparatus 100 is forcibly stopped, if the same sheet conveyance as the residual sheet conveyance control is performed, the sheet is conveyed to a position shifted from the position to be confirmed. It will end up.
Therefore, the present embodiment is characterized in that whether or not to perform the residual paper conveyance control is switched when the confirmation stop control is performed.
That is, when the stop condition is detected and the image forming apparatus 100 is stopped, residual paper conveyance control is performed, and when the JAM is detected before the stop condition is detected, the same as when a normal JAM occurs. Residual paper transport control is implemented.

Further, in the present embodiment, the image forming apparatus 100 performs the residual paper transport control when the stop condition in the confirmation stop control is for image formation confirmation, and performs the residual paper transport control for the paper transport confirmation. Not implemented.
The stop conditions in which parameter 1 shown in FIG. 6 is “1” and “2” are stop conditions (first stop conditions) for confirmation stop control for image formation confirmation, and other stop conditions are paper conveyance This is a stop condition (second stop condition) for confirmation stop control for confirmation.
Here, when the stop processing similar to the residual paper conveyance control is performed when the confirmation stop control for paper conveyance confirmation is performed, the stopped paper is conveyed to a position shifted from a desired position.
For example, when the parameter 1 is “140”, the image forming apparatus 100 is stopped when the leading edge of the sheet turns on the main body sheet discharge sensor SE2. This is to check the conveyance state of the paper stopped at the position B (specific position) in FIG. 3. At this time, if the same stop process as the residual paper conveyance control is performed, the paper is directed to the post-processing unit 60. The sheet is conveyed to a position advanced by a predetermined amount, and the sheet conveyance confirmation at the desired position cannot be performed.
Similarly, when the parameter 1 is “300”, the image forming apparatus 100 is stopped at the timing when the feeding of the sheet from the sheet feeding tray is started, and the conveyance state of the sheet stopped at the position A (specific position) is checked. It is necessary to perform control so that the paper is not conveyed to the vertical conveyance unit 71 as in the residual paper conveyance control.

  Therefore, in this embodiment, when the confirmation stop control for paper conveyance confirmation is performed, control is performed so that the residual paper conveyance control is not performed regardless of whether or not JAM is detected.

  On the other hand, when the confirmation stop control for image formation confirmation is performed, there is no major problem even if the residual paper transport control is transported to a position slightly deviated from the desired position. Priority is given to residual paper conveyance control.

In the present exemplary embodiment, after the image forming apparatus 100 is forcibly stopped by the confirmation stop control or the residual paper transport process by the residual paper transport control, after the residual paper is completely removed from the image forming apparatus 100, the image forming apparatus The stop state of 100 is released, and the print is ready again.
In addition, when a user inputs an instruction to remove residual paper, residual paper conveyance control can be performed if necessary according to the stop position of the paper. An instruction from the user is accepted by an input from an external device such as a personal computer via the communication unit 83 or an input from the operation unit 15.

  Next, the operation of the image forming apparatus 100 according to the first embodiment when performing the confirmation stop control will be described using the flowcharts of FIGS. 7 and 8.

First, when the image forming apparatus 100 receives a print instruction (step S701), the control unit 81 controls the paper feeding unit 50 to start feeding from the designated paper feed tray T1 (step S702).
Subsequently, the control unit 81 determines whether a stop condition is set (step S703). As described above, the stop condition is the stop timing represented by the parameter 1 shown in FIG. When the control unit 81 determines that the stop condition is set (step S703: Yes), the control unit 81 proceeds to step S801 in FIG. 8 and performs confirmation stop control.

In the confirmation stop control, the control unit 81 determines whether a stop condition has been detected (step S801). When it is determined that the stop condition is detected (step S801: Yes), the control unit 81 determines whether there is a time setting until the stop (step S802). As described above, the time setting until the stop refers to the parameter 2 shown in FIG.
When it is determined that there is no time until stop (step S802: No), the control unit 81 proceeds to step S804, but when it is determined that there is time until stop (step S802: Yes), the setting is made. The printing process is continued for the set time (step S803), and the process proceeds to step S804.

In step S804, the control unit 81 forcibly stops the image forming apparatus 100. This is the confirmation stop control.
Next, in step S805, it is determined whether or not the stop condition is for image formation confirmation. If it is determined in step S805 that the stop condition is not for image formation confirmation (step S805: No), that is, if it is determined that the stop condition is for paper conveyance confirmation (second stop condition), the confirmation stop control is terminated. The process proceeds to step S711 in FIG. If it is determined in step S805 that the image formation confirmation stop condition (first stop condition) is satisfied (step S805: Yes), residual paper conveyance control is executed (step S806), and the confirmation stop control is terminated. The process proceeds to step S711.

  If the control unit 81 determines in step S801 that no stop condition has been detected (step S801: No), the control unit 81 determines whether JAM has been detected (step S807). The JAM detection is performed using an existing JAM detection sensor disposed in the image forming apparatus 100. If the control unit 81 determines that no JAM has been detected (step S807: No), the control unit 81 returns to step S801, but if it determines that a JAM has been detected (step S807: Yes), the image forming apparatus 100 stops the JAM. (Step S808). Here, the JAM stop means that the control unit 81 displays that an error has occurred on the display unit 20 and prevents a subsequent sheet from hitting the JAM. Is a process for stopping the operation of the image forming apparatus 100.

  Next, the control unit 81 determines whether the JAM stopped sheet is stopped at a specific position (step S809). Here, the specific position is a position where the sheet is divided by pulling out the unit as shown by the positions A and B in FIG. When determining that the position is not the specific position (step S809: No), the control unit 81 ends the confirmation stop control and proceeds to step S711 in FIG. When the control unit 81 determines that the position is the specific position (step S809: Yes), the control unit 81 performs residual paper conveyance control (step S810). By performing the residual paper conveyance control, as described above, the residual paper can be moved to a position where it can be easily taken out. When the residual paper conveyance control is completed, the process proceeds to step S711 in FIG.

  On the other hand, in step S703, when the control unit 81 determines that the stop condition is not set (step S703: No), the control unit 81 performs normal image formation instead of the confirmation stop control, and proceeds to step S704.

  In step S704, the control unit 81 determines whether JAM has been detected. The JAM detection is performed using an existing JAM detection sensor disposed in the image forming apparatus 100.

When determining that the JAM is not detected (step S704: No), the control unit 81 determines whether it is the print timing (step S705). The print timing means that the image forming unit 40 and the conveyance unit 70 can start printing. If the control unit 81 determines that it is not the print timing (step S705: No), it returns to step S703, but if it is determined that it is the print timing (step S705: Yes), it executes print processing (step S706).
When the execution of the print process is completed, the control unit 81 determines whether or not there is a next print instruction (step S707). If it is determined that there is no next print instruction (step S707: No), the control ends. If it is determined that there is a next print instruction (step S707: Yes), the process returns to step S702 and the subsequent processing is repeated.

  In step S704, when the control unit 81 determines that JAM has been detected (step S704: Yes), the image forming apparatus 100 stops the JAM (step S708).

  Next, the control unit 81 determines whether the JAM stopped sheet is stopped at a specific position (step S709). If the control unit 81 determines that the position is not the specific position (step S709: No), the process proceeds to step S711. If the control unit 81 determines that the position is the specific position (step S709: Yes), the control unit 81 performs the residual paper conveyance control. Implement (step S710). By performing the residual paper conveyance control, as described above, the residual paper can be moved to a position where it can be easily taken out.

In step S <b> 711, the control unit 81 determines whether all remaining paper in the image forming apparatus 100 has been removed. If it is determined that all the images have been removed (step S711: Yes), the stopped state of the image forming apparatus 100 is released (step S712), and the control is terminated as a printable state.
If the control unit 81 determines in step S711 that all the remaining sheets have not been removed (step S711: No), it determines whether an instruction for conveying the remaining sheets has been input by the user (step S713). If it is determined that the instruction for conveying the residual paper has not been input (step S713: No), the process returns to step S711, but if it is determined that the instruction has been input (step S713: Yes), residual paper conveyance control is performed (step S711). S714), the process returns to step S711.

As described above, the image forming apparatus 100 according to the present embodiment has the confirmation stop control for stopping the conveyance of the paper under the preset stop condition and the paper stopped in the image forming apparatus 100 up to a predetermined position. When the confirmation stop control is performed, if the image forming apparatus 100 is stopped according to the stop condition, the residual paper transport control is performed according to the stop condition. And the remaining paper conveyance control is performed according to the determination.
Therefore, according to the image forming apparatus 100 according to the present embodiment, the sheet can be stopped at a desired position when the confirmation stop control is performed.

  In the present embodiment, the stop of the image forming apparatus 100 by JAM detection and the forced stop of the image forming apparatus 100 by the confirmation stop control are performed as the same processing. That is, as described above, when the JAM is stopped, the control unit 81 displays on the display unit 20 that an error has occurred, stops the load such as the motor upstream from the JAM occurrence point, and operates the image forming apparatus 100. Although the process is to be stopped, the same process can be used in the forced stop by the confirmation stop control, thereby simplifying the program and clearly indicating the position where the residual paper exists, so that the residual paper can be easily removed. Become.

  In addition, even when the confirmation stop control is performed, the image forming apparatus 100 according to the present embodiment performs JAM processing in the same manner as during normal image formation when JAM is detected before detecting the stop condition. Therefore, when JAM occurs, the residual paper can be easily removed by performing the residual paper conveyance control, so that the work efficiency of the residual paper removal by the user can be improved.

  Further, the image forming apparatus 100 according to the present embodiment performs the residual paper conveyance control in response to an instruction from the user after executing the residual paper conveyance control and after forcibly stopping the image forming apparatus 100 by the confirmation stop control. . Therefore, even when the conveyance of the paper is stopped at a position where it is difficult to remove the residual paper by the confirmation stop control, the residual paper conveyance control can be performed thereafter to improve the work efficiency of the residual paper removal by the user. it can.

Further, the image forming apparatus 100 according to the present embodiment performs the residual paper conveyance control when the stop condition for image formation confirmation (first stop condition) is set at the time of the confirmation stop control. When the stop condition for transport confirmation (second stop condition) is set, the residual paper transport control is not performed.
Therefore, according to the image forming apparatus 100 according to the present embodiment, the conveyance state at a desired position can be confirmed under the stop condition for paper conveyance, and the remaining paper can be confirmed under the stop condition for image confirmation. Since the sheet is transported to a position where it can be easily removed, the confirmation stop control can be performed without affecting the work efficiency of the user.

[Other Embodiments]
As mentioned above, although concretely demonstrated based on embodiment which concerns on this invention, said embodiment is a suitable example of this invention, and is not limited to this.

  For example, in the above-described embodiment, the stop of the image forming apparatus 100 by JAM detection and the forced stop of the image forming apparatus 100 by the confirmation stop control have been described as the same process. It is also possible to do.

  In the above embodiment, when the residual paper conveyance control is performed, the conveyance process is performed on all the sheets in the image forming apparatus 100. However, the present invention is not limited to this, and the process is performed only on specific sheets. It is also possible to do. For example, when the parameter 1 in FIG. 6 is “140”, the leading edge of the first sheet turns on the main body sheet discharge sensor SE2, and the remaining sheet conveyance control is not performed only on the sheet, and the remaining sheet is transferred to another sheet. On the other hand, the residual paper conveyance control is executed as necessary. As a result, it is possible to ensure the ease of removing other residual sheets without affecting the sheet conveyance confirmation.

  In addition, the detailed configuration of each apparatus constituting the image forming apparatus and the detailed operation of each apparatus can be appropriately changed without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 20 Display part 40 Image formation part 43 Secondary transfer roller 44 Fixing part 441 Fixing roller 45 ADU reversing mechanism 46 Registration roller 47 ADU conveyance unit 50 Paper feed part 51 Vertical conveyance door 60 Post-processing part 70 Conveyance part 71 Vertical conveyance part 72 Main body Paper discharge roller 73 Post-processing section carry-in roller 81 Control section (control section, determination section)
100 Image forming apparatus SE1 Fixing paper discharge sensor (detection unit)
SE2 Main unit paper ejection sensor (detector)

Claims (6)

An image forming unit that forms a toner image on paper;
A transport unit for transporting paper;
An image forming apparatus comprising: a control unit that controls paper conveyance;
The controller is
Check stop control to stop paper transport under the specified stop conditions for paper check,
When performing the confirmation stop control, it is determined whether or not to perform residual paper transport control for transporting paper remaining in the image forming apparatus to a predetermined position according to the stop condition. Forming equipment. A detection unit for detecting occurrence of JAM;
The controller is
When JAM is detected by the detection unit, JAM stop control is performed to stop paper conveyance,
The controller is
In the JAM stop control, when the detection unit detects JAM, the residual paper conveyance control is performed, and when the detection unit does not detect JAM, the confirmation stop control is performed. The image forming apparatus according to claim 1. The stop condition includes a first stop condition for confirming an image forming state and a second stop condition for confirming a sheet conveyance state,
The controller is
When the first stop condition is satisfied, it is determined that the residual paper transport control is performed, and when the second stop condition is satisfied, it is determined that the residual paper transport control is not performed. The image forming apparatus according to claim 1. The controller is
4. The image forming apparatus according to claim 1, wherein when performing the residual sheet conveyance control, only a specific sheet in the image forming apparatus is conveyed to the predetermined position. 5. A determination unit that determines whether an instruction to perform the residual paper conveyance control from a user is input;
The controller is
If the determination unit determines that an instruction to perform the residual paper conveyance control is input, the residual paper conveyance control is performed even if the stop condition is a condition that the residual paper conveyance control is not performed. The image forming apparatus according to claim 1, wherein the image forming apparatus is an image forming apparatus. An image forming apparatus comprising: an image forming unit that forms a toner image on a sheet; and a conveyance unit that conveys the sheet.
Confirmation stop control is performed to stop the conveyance of the sheet under a predetermined stop condition for confirming the sheet. When the confirmation stop control is performed, the sheet remaining in the image forming apparatus is determined according to the stop condition. A program for functioning as a control unit that determines whether or not to carry out residual paper conveyance control to convey to a predetermined position.

Images