JP2011046012A - Image forming apparatus and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus and a program which can break supply of an electric power when clogging of a recording medium occurs. <P>SOLUTION: The image forming apparatus has a conveying means which conveys the recording medium, a driving means which drives the conveying means, a power supply means which supplies the power to the driving means, a counting means which counts the number of times of clogging of the recording medium that occurs in cases other than a predetermined case, and a power supply control means which breaks supply of the power from the power supply means when the number of times of clogging of the recording medium counted by the counting means reaches a preliminarily determined number. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

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

Patent Document 1 monitors an abnormality in the apparatus through various sensors, and when an abnormality occurs, address information corresponding to the content is supplied to a nonvolatile memory, and an internal abnormality content determination table is searched. Is disclosed.
This table divides the abnormal contents into those that can be recovered by the operator and those that can be recovered by the service person. For abnormal contents that require a service person, a message to that effect is displayed on the operation panel. The power of the circuit part of is cut off.
Thereby, power saving at the time of abnormality is performed.

JP 7-52503 A

  An object of the present invention is to provide an image forming apparatus and a program that can cut off the supply of power when a recording medium is jammed.

  According to a first aspect of the present invention, there is provided a conveying unit that conveys a recording medium, a driving unit that drives the conveying unit, a power supply unit that supplies power to the driving unit, and a recording medium jam that has occurred except in a predetermined case. And a power for cutting off the supply of power from the power supply means when the number of occurrences of clogging of the recording medium counted by the counting means reaches a predetermined number. An image forming apparatus having supply control means.

  According to a second aspect of the present invention, there are a plurality of the conveying means, a plurality of the driving means, the plurality of driving means drive each of the conveying means, and the counting means generates a recording medium jam. The number of occurrences of clogging of the recording medium is counted for each driving means for driving the conveying means, and the power supply control means determines that the number of occurrences of clogging of the recording medium counted for each driving means by the counting means is in advance. The image forming apparatus cuts off the supply of power from the power supply unit to the drive unit when a predetermined number is reached.

  According to a third aspect of the present invention, the power supply means includes a drive system power supply that supplies power to the drive means, and a main power supply that supplies power to the drive system power supply, and the counting means includes the main power supply. An image forming apparatus that counts the number of occurrences of clogging of a recording medium that occurs except when the recording medium is supplied to the conveying unit for the first time after power supply from a power source is resumed.

  The invention according to claim 4 further includes state control means for switching between a normal state and a power saving state in which power consumption is reduced as compared with the normal state, and the counting means is in a power saving state by the state control means. The image forming apparatus counts the number of occurrences of the recording medium clogging that occurs except when the recording medium is supplied to the conveying unit for the first time after returning to the normal state.

  The invention according to claim 5 further includes a recording medium supply means for supplying a recording medium to the conveying means, and the counting means starts from the recording medium supply apparatus after the recording medium supply means is inserted and removed. This is an image forming apparatus that counts the number of occurrences of clogging of a recording medium that occurs except when the recording medium is conveyed.

  In the invention according to claim 6, the counting means counts the number of occurrences of the recording medium clogging that occurs except when the recording medium is supplied to the conveying means for the first time after the size and type of the recording medium are changed. An image forming apparatus.

  According to a seventh aspect of the present invention, there is provided a transporting step for transporting a recording medium, a driving step for driving the transporting unit, a power supply step for supplying power to the driving unit, and a recording medium jam that has occurred except in a predetermined case. A counting step for counting the number of occurrences of the recording medium, and an electric power for cutting off the supply of power from the power supply means when the number of occurrences of the recording medium clogging counted by the counting means reaches a predetermined number A program for causing a computer to execute a supply control step.

  According to the first aspect of the present invention, when the recording medium is jammed, it is possible to suppress the consumption of the electric power supplied to the driving unit.

  According to the second aspect of the present invention, in addition to the effect obtained by the first aspect of the invention, it is possible to suppress the consumption of electric power supplied to the driving unit that drives the conveying unit that has caused the recording medium clogging.

  According to the third aspect of the present invention, in addition to the effect obtained by the first or second aspect of the invention, the recording medium is transported from the recording medium supply device for the first time after the power supply from the main power supply is resumed. In such a case, it can be controlled not to cut off the power supply.

  According to the fourth aspect of the present invention, in addition to the effect obtained by the first or second aspect of the invention, after the image forming apparatus returns from the power saving mode to the normal power mode, the recording medium supply apparatus When the recording medium is conveyed for the first time, it can be controlled not to cut off the supply of power.

  According to the fifth aspect of the present invention, in addition to the effect obtained by the first or second aspect of the invention, the recording medium is transported for the first time after the recording medium supply device is inserted and removed. In such a case, it can be controlled not to cut off the power supply.

  According to the sixth aspect of the present invention, in addition to the effect obtained by the first or second aspect of the invention, the size and type of the recording medium stored in the recording medium supply device are changed, and then the recording medium is changed. When the recording medium is transported for the first time from the supply device, it can be controlled not to cut off the supply of power.

  According to the seventh aspect of the present invention, when the recording medium is jammed, it is possible to suppress the consumption of the electric power supplied to the driving unit.

1 is a diagram illustrating a configuration of an image forming apparatus according to the present invention. FIG. 2 is a diagram illustrating a configuration of a drive unit of the image forming apparatus illustrated in FIG. 1. FIG. 2 is a diagram illustrating a configuration of a drive system power supply of the image forming apparatus illustrated in FIG. 1. It is a figure which shows the hardware constitutions of the control part shown in FIG. FIG. 2 is a diagram illustrating a configuration of a control program executed by a control unit of the image forming apparatus illustrated in FIG. 1. It is a drive part corresponding | compatible table which the table memory | storage part shown in FIG. 5 memorize | stores. It is a figure which shows the control processing (S10) of the power saving mode control part shown in FIG. It is a flowchart which shows the process (S20) which the determination part shown in FIG. 5 determines whether it is a designation | designated situation. 3 is a flowchart showing an overall operation (S30) of the image forming apparatus 1 shown in FIG.

[First Embodiment]
Hereinafter, the image forming apparatus 1 according to the present invention will be described.
FIG. 1 is a diagram illustrating the configuration of an image forming apparatus 1 according to the present invention.
As shown in FIG. 1, the image forming apparatus 1 includes a control unit 4, an image forming unit 10, a primary transfer device 12, a first paper feed device 14, a secondary transfer device 20, a fixing device 22, and a second paper feed. Apparatus 28 and the like.

The image forming unit 10 includes a laser beam scanning device 100 that scans a laser beam according to image data supplied from the control unit 4, and a laser that is disposed above the laser beam scanning device 100 and scanned by the laser beam scanning device 100. And a photosensitive drum 102 on which an electrostatic latent image is formed by light.
The laser beam scanning device 100 deflects and scans the laser beam modulated according to the image data of each color and irradiates the photosensitive drum 102.
The photosensitive drum 102 rotates in the direction of arrow a.
Further, around the photosensitive drum 102, a cleaning device 104 that cleans the surface of the photosensitive drum 102, a charger 106 that charges the surface of the photosensitive drum 102, and a static electricity formed on the surface of the photosensitive drum 102. A developing device 108 for developing the electrostatic latent image is provided in this order along the direction of the arrow a.

That is, the photosensitive drum 102 is charged by the charger 106 and irradiated with laser light from the laser beam scanning device 100, whereby an electrostatic latent image corresponding to the image data of each color is formed.
Further, when the electrostatic latent image passes through the developing unit 108, toner is supplied from the developing unit 108 to the surface of the photosensitive drum 102, and the toner remains only on the electrostatic latent image on the surface of the photosensitive drum 102. Developed.

The primary transfer device 12 receives the toner image from the photosensitive drum 102 to the transfer belt 120 and performs primary transfer.
That is, multiple color toner images are transferred onto the transfer belt 120.
More specifically, the primary transfer device 12 includes a transfer belt 120 wound around a drive roll 122 and a backup roll 124 in a tensioned state.
The transfer belt 120 is circulated and rotated in the direction of the arrow b by the drive roll 122.
A primary transfer roll 126 that rotates with the photosensitive drum 102 is rotatably provided on the inner peripheral side of the transfer belt 120.
A belt cleaner 128 that cleans the surface of the transfer belt 120 is provided at a position facing the drive roll 122 with the transfer belt 120 in between.
The belt cleaner 128 scrapes off the toner remaining on the surface of the transfer belt 120.

Therefore, in the primary transfer device 12, the toner image on the photosensitive drum 102 is primarily transferred onto the transfer belt 120 that circulates and rotates in the direction of the arrow b.
In addition, a toner image remains on the surface of the photosensitive drum 102 after the primary transfer, but the residual toner image is scraped off from the surface of the photosensitive drum 102 by the cleaning device 104.

The first paper feeder 14 is provided at the bottom of the image forming apparatus 1.
The first paper feeding device 14 includes a first paper feeding unit 140, a second paper feeding unit 141 and a third paper feeding unit 142 in which paper is accumulated, a first paper feeding unit 140, a second paper feeding unit A first extraction roll 143, a second extraction roll 144, and a third extraction roll 145 that pull out one sheet from each of the sheet feeding unit 141 and the third sheet feeding unit 142, and the sheet to the first sheet feeding unit 140, a first transport roll pair 146, a second transport roll pair 147, and a third transport roll pair 148 sent to the paper transport path 16 from the second paper feed section 141 and the third paper feed section 142, respectively. Have.
That is, the first paper feeding device 14 supplies paper to the image forming apparatus 1.

The paper transport path 16 is provided with a first transport roll 160, a second transport roll 162, and a third transport roll 164 that transport paper.
Further, the image forming apparatus 1 includes a registration roll pair 166 that feeds a sheet to the secondary transfer device 20 at a predetermined timing, a first discharge roll 168 that discharges the sheet to the first discharge unit 180, and a sheet. A second discharge roll 170 that discharges the paper to the second discharge portion 182 and a face-up roll 172 that discharges the paper to the third discharge portion 184 are provided.
In other words, the paper drawn out from the first paper feed storage unit 140, the second paper feed storage unit 141, and the third paper feed storage unit 142 and sent into the paper transport path 16 is transferred to the paper transport path 16. The paper is transported in the paper transport direction (the direction of the arrow c) and discharged to any one of the first discharge unit 180, the second discharge unit 182 and the third discharge unit 184.

The secondary transfer device 20 includes a secondary transfer roll 200 that rotates while generating a transfer pressure with the backup roll 124.
In the secondary transfer device 20, the toner image is secondarily transferred onto the surface of the paper.
More specifically, a sheet conveyed from the first sheet feeding device 14 is inserted between the secondary transfer roll 200 and the transfer belt 120 in synchronization with the toner image on the transfer belt 120, and A toner image is secondarily transferred to the surface.
The second-transferred sheet is sent to the fixing device 22.

A fixing device 22 is provided on the downstream side of the secondary transfer device 20 in the paper transport direction.
The fixing device 22 includes a heating roll 220 and a pressure roll 222.
The fixing device 22 fixes the secondary transfer image on the surface of the paper by conveying the paper while being heated between the heating roll 220 and the pressure roll 222 while being heated.

A reverse roll 24 is provided on the downstream side of the fixing device 22 in the paper transport direction.
The reverse roll 24 feeds the paper into the reverse conveyance path 26.
The reversing conveyance path 26 includes three conveyance roll pairs 260.
The transport roll pair 260 transports the paper with the paper sandwiched therebetween.
That is, the reversing conveyance path 26 reverses the front and back of the sheet and sends it again to the sheet conveying path 16.

The second paper feeding device 28 is provided on the side surface of the image forming apparatus 1.
The second paper feeding device 28 includes a fourth paper feeding unit 280 on which paper is stacked, a fourth extraction roll 282 that pulls out one paper from the fourth paper feeding unit 280, and a second paper feeding. A fourth transport roll pair 284 that feeds paper from the apparatus 28 to the paper transport path 16.
That is, the second paper feeding device 28 supplies paper to the image forming apparatus 1.

Further, the image forming apparatus 1 is provided with a plurality of paper sensors for detecting paper.
For example, the paper sensor 300 is provided on the downstream side of the first transport roll pair 146 and the second transport roll 162 and on the upstream side of the third transport roll 164 in the paper transport direction.
A paper sensor 302 is provided on the downstream side of the secondary transfer roll 200 and on the upstream side of the heating roll 220 in the paper transport direction.
The sheet sensor 300 and the sheet sensor 302 transmit a signal to the control unit 4 when detecting the sheet being conveyed.

FIG. 2 is a diagram showing a configuration of the drive unit 32 of the image forming apparatus 1 shown in FIG.
As shown in FIG. 2, the drive unit 32 of the image forming apparatus 1 includes, for example, a fixing drive unit 320, a main drive unit 322, a first paper feed drive unit 324, a second paper feed drive unit 326, and a third drive unit. A paper feed drive unit 328, a paper supply drive unit 330, a reversal drive unit 332, and a discharge drive unit 334 are included.

The fixing driving unit 320 drives the heating roll 220 and the first discharge roll 168 that are transport rolls.
The main drive unit 322 drives the secondary transfer roll 200, the third transport roll 164, the resist roll pair 166, the fourth extraction roll 282, and the fourth transport roll pair 284, which are transport rolls.
The first paper feed driving unit 324 drives the first extraction roll 143 and the first transport roll pair 146 that are transport rolls.
The second paper feed driving unit 326 drives the second extraction roll 144 and the second transport roll pair 147 which are transport rolls.

The third paper feed driving unit 328 drives the third extraction roll 145 and the third transport roll pair 148 that are transport rolls.
The paper supply driving unit 330 drives the first transport roll 160 and the second transport roll 162 which are transport rolls.
The reversing drive unit 332 drives a transport roll pair 260 that is a transport roll.
The discharge driving unit 334 drives the reverse roll 24, the second discharge roll 170, and the face-up roll 172 that are transport rolls.

FIG. 3 is a diagram showing the configuration of the drive system power supply 34 of the image forming apparatus 1 shown in FIG.
As shown in FIG. 3, the drive system power supply 34 includes, for example, a main power supply 356, a fixing power supply 340, a main drive unit power supply 342, a first paper supply power supply 344, a second paper supply power supply 346, and a third power supply. A paper power source 348, a paper supply power source 350, a reversal power source 352, and a discharge power source 354 are configured.

The main power supply 356 includes a fixing power supply 340, a main drive power supply 342, a first paper supply power supply 344, a second paper supply power supply 346, a third paper supply power supply 348, a paper supply power supply 350, and a reversing power supply 352. In addition, power is supplied to the discharge power source 354.
The fixing power source 340 supplies power to the fixing driving unit 320.
The main drive unit power supply 342 supplies power to the main drive unit 322.

The first paper feed power supply 344 supplies power to the first paper feed drive unit 324.
The second paper feed power source 346 supplies power to the second paper feed drive unit 326.
The third paper feed power source 348 supplies power to the third paper feed drive unit 328.

The paper supply power supply 350 supplies power to the paper supply drive unit 330.
The inversion power source 352 supplies power to the inversion drive unit 332.
The discharge power source 354 supplies power to the discharge drive unit 334.

FIG. 4 is a diagram illustrating a hardware configuration of the control unit 4 illustrated in FIG. 1.
As shown in FIG. 4, the control unit 4 includes a CPU (Central Processing Unit) 400, a memory 402, a storage device 404 such as a hard disk drive, a communication IF (Interface) 406 that transmits and receives data to and from an external computer, and the like. A control IF (Interface) 408 for controlling each drive system power supply 34 is provided.
These components are connected to each other via a system bus 410.
The control unit 4 controls the drive system power supply 34 of the image forming apparatus 1 with these configurations.
Further, the control unit 4 accepts image data from an image reading device (not shown) or an external computer and supplies the image data to 10.
Further, the control unit 4 receives a print instruction from a touch panel (not shown) or an external computer and executes print processing.

[Control program 42]
Hereinafter, the control program 42 executed by the control unit 4 of the image forming apparatus 1 will be described.
FIG. 5 is a diagram showing a configuration of a control program 42 executed by the control unit 4 of the image forming apparatus 1 shown in FIG.
The control program 42 includes a paper jam detection unit 420, a drive unit information search unit 422, a table storage unit 424, a drive unit information storage unit 426, a threshold storage unit 428, a drive unit information monitoring unit 430, a main power supply control unit 432, a paper feed The apparatus state monitoring unit 434, the sheet state monitoring unit 436, the sheet conveyance monitoring unit 438, the power saving mode control unit 440, the determination unit 460, the blocking unit 462, the error output unit 464, and the drive unit information erasing unit 466 are configured.
For example, the control program 42 is stored in the memory 402 and supplied to the image forming apparatus 1, and specifically uses the hardware resources of the image forming apparatus 1 on the OS (not shown) of the image forming apparatus 1. It is executed (the same applies to the following programs).

FIG. 6 is a drive unit correspondence table stored in the table storage unit 424 shown in FIG.
As illustrated in FIG. 6, the table storage unit 424 stores a drive unit correspondence table in which a paper jam pattern, the drive unit 32, the drive system power supply 34, and a transport roll are associated with each other.
For example, the paper jam pattern B corresponding to the main drive unit 322 is a paper jam related to the range from the paper sensor 300 to the paper sensor 302 in the paper transport direction (FIG. 2; arrow c), as shown in FIG. It corresponds to.
That is, the paper jam pattern B indicates a paper jam related to the transport roll driven by the main drive unit 322.

The paper jam detection unit 420 detects a paper jam in the image forming apparatus 1.
Specifically, the paper jam detection unit 420 receives signals from a plurality of paper sensors provided in the image forming apparatus 1 and detects a paper jam.
Also, the paper jam detection unit 420 refers to the table stored in the table storage unit 424 and determines which of the paper jam patterns A to H the detected paper jam is.
For example, a paper jam on the downstream side of the paper sensor 302 and on the upstream side of the paper sensor 300 is caused by the secondary transfer roll 200, the third transport roll 164, the resist roll pair 166, the fourth extraction roll 282, and the fourth. Therefore, it is determined that it corresponds to the paper jam pattern B.
In addition, the paper jam detection unit 420 outputs information on the determined paper jam pattern to the drive unit information search unit 422.
Further, the paper jam detection unit 420 outputs to the error output unit 464 that a paper jam has been detected.

The drive unit information search unit 422 uses the information on the paper jam pattern received from the paper jam detection unit 420 and the drive unit correspondence table stored in the table storage unit 424 to determine the drive unit 32 corresponding to the paper jam pattern. Search for.
However, the drive unit information search unit 422 does not perform the above search when the determination unit 460 notifies that it is in the designated state.
For example, when the drive unit information search unit 422 receives information indicating the paper jam pattern B from the paper jam detection unit 420, the main drive corresponding to the paper jam pattern B of the drive unit correspondence table stored in the table storage unit 424. The part 322 is searched.
Further, the drive unit information search unit 422 outputs the searched information of the drive unit 32 to the drive unit information storage unit 426, the drive unit information monitoring unit 430, and the error output unit 464.

The drive unit information storage unit 426 stores the drive unit information input from the drive unit information search unit 422.
The threshold storage unit 428 stores conditions for shutting off the drive system power supply 34.
More specifically, when the drive unit information search unit 422 continuously searches for the same drive unit 32 a predetermined number of times (continuous number of times), the power supply from the drive system power supply 34 is cut off. .
That is, the threshold storage unit 428 stores the number of consecutive times that is a condition for shutting off the drive system power supply 34 as a threshold.
For example, when information indicating that the number of consecutive times is “2” is stored in the threshold storage unit 428, the drive unit information search unit 422 may search for the same drive unit 32 twice in succession. This is a condition for cutting off the power supply from the drive system power supply 34.
This threshold is set by the user from the touch panel (not shown) of the image forming apparatus 1 or the like.

When the drive unit information monitoring unit 430 receives the information of the drive unit 32 from the drive unit information search unit 422, the drive unit information search unit 430 refers to the drive unit information storage unit 426 and the threshold storage unit 428, and the drive unit information search unit 422 is the same drive unit 32. Is monitored continuously for the threshold number of times.
When the drive unit information monitoring unit 430 detects that the drive unit information search unit 422 has continuously searched the same drive unit 32 by the number of times of the threshold, the drive unit information monitoring unit 430 refers to the table storage unit 424 and refers to the drive unit 32. The information of the drive system power supply 34 that drives is output to the blocking unit 462 and the error output unit 464.
For example, when information indicating that the continuous count is “2” is stored in the threshold storage unit 428, the drive unit information monitoring unit 430 includes the drive unit information search unit 422 in the drive unit information search unit 426. When information indicating that the main driving unit 322 has been searched twice in succession is stored, information on the main driving unit power source 342 that drives the main driving unit 322 is sent to the blocking unit 462 and the error output unit 464. Output.

The main power supply control unit 432 controls the supply of power from the main power supply 356 to each power supply.
Specifically, power supply from the main power supply 356 to each power supply is controlled in accordance with a control signal from a switch (not shown) operated by the user.
In addition, the main power supply control unit 432 outputs the power supply state from the main power supply 356 to the determination unit 460.

The power saving mode control unit 440 cuts off the power supply from the drive system power supply 34 when a touch panel (not shown) provided in the image forming apparatus 1 is not operated for a certain period of time, thereby saving power. Transition to mode.
For example, the power saving mode control unit 440 shifts to the power saving mode by cutting off the power supply from the fixing power source 340 and turning off the backlight of the touch panel.
Further, the power saving mode control unit 440 outputs the power mode (normal mode, power saving mode) to the determination unit 460.
Hereinafter, a specific example of the control process of the power saving mode control unit 440 will be described with reference to FIG.

FIG. 7 is a diagram showing a control process (S10) of the power saving mode control unit 440 shown in FIG.
As shown in FIG. 7, in step 100 (S100), the power saving mode control unit 440 determines whether the touch panel provided in the image forming apparatus 1 has not been operated for a certain period of time.
If the touch panel provided in the image forming apparatus 1 has not been operated for a certain period of time, the power saving mode control unit 440 proceeds to the process of S102, and otherwise returns to the process of S100.
In step 102 (S102), the power saving mode control unit 440 shifts to the power saving mode by shutting off the power supply from each power source of the drive system power source 34 and turning off the backlight of the touch panel.
In step 104 (S104), the power saving mode control unit 440 determines whether the touch panel provided in the image forming apparatus 1 has been operated.
If the touch panel or the like is operated, the process proceeds to S106. Otherwise, the process returns to S102.
In step 106 (S106), the power saving mode control unit 440 resumes the supply of power from each power source of the drive system power source 34 and returns to the normal mode by turning on the backlight of the touch panel.

The sheet feeding device state monitoring unit 434 monitors the state of the first sheet feeding device 14 and the second sheet feeding device 28 and outputs the state of the sheet feeding device to the determination unit 460.
For example, the sheet feeding device state monitoring unit 434 receives signals from the sheet sensors provided in the first sheet feeding device 14 and the second sheet feeding device 28 and receives the first sheet feeding unit 140 and the second sheet feeding unit. It is monitored whether or not the paper unit 141, the third paper supply unit 142, and the fourth paper supply unit 280 are inserted and removed.

The paper state monitoring unit 436 monitors the paper size and paper type (paper type) stored in the first paper feeding device 14 and the second paper feeding device 28, and indicates the paper size and paper type. Information is output to the determination unit 460.
For example, the sheet status monitoring unit 436 receives signals from the sheet sensors provided in the first sheet feeding unit 140, the second sheet feeding unit 141, the third sheet feeding unit 142, and the fourth sheet feeding unit 280. The paper type such as the paper size and paper type to be conveyed is monitored.

The paper conveyance monitoring unit 438 monitors that the paper has been conveyed from the first paper feeding device 14 and the second paper feeding device 28, and sends information indicating that the paper has been conveyed to the determination unit 460. Output.
For example, the paper conveyance monitoring unit 438 receives signals from paper sensors provided in the first extraction roll 143, the second extraction roll 144, the third extraction roll 145, and the fourth extraction roll 282, and the paper is Monitor the transport.

The determination unit 460 includes the state of the main power supply 356 input from the main power supply control unit 432, the power mode input from the power saving mode control unit 440, and the paper supply device input from the paper supply device state monitoring unit 434. Based on the status, information indicating the paper size and paper type input from the paper status monitoring unit 436, and information indicating that the paper received from the paper transport monitoring unit 438 has been conveyed, occurrence of a paper jam is detected. It is determined whether or not the situation is not counted (specified situation).
In addition, when the determination unit 460 determines that the specified state is set, the determination unit 460 outputs a message to that effect to the drive unit information search unit 422.

FIG. 8 is a flowchart showing a process (S20) for determining whether or not the determination unit 460 shown in FIG.
As shown in FIG. 8, in step 200 (S200), the determination unit 460 determines whether or not it is the first sheet conveyance from the sheet feeding unit after the main power source 356 starts supplying power.
After the main power supply 356 starts supplying power, if it is the first paper conveyance from the paper supply unit, the process proceeds to S208. Otherwise, the process proceeds to S202.

In step 202 (S202), the determination unit 460 determines whether or not it is the first sheet conveyance from the sheet feeding unit after returning from the power saving mode to the normal mode.
After the return from the power saving mode to the normal mode, if the paper is transported for the first time from the paper feeding unit, the process proceeds to S208. Otherwise, the process proceeds to S204.

In step 204 (S204), the determination unit 460 determines whether or not it is the first sheet conveyance from the inserted and removed sheet feeding unit after the sheet feeding unit is inserted and removed.
After the paper feeding section is inserted and removed, if it is the first paper transport from the paper feeding section that has been inserted and removed, the process proceeds to S208. Otherwise, the process proceeds to S206.

In step 206 (S206), the determination unit 460 determines whether or not it is the first sheet conveyance from the sheet feeding unit after the size and type of the sheet stored in the sheet feeding unit are changed.
After the paper size and paper type stored in the paper feed unit have been changed, if this is the first paper transport from this paper feed unit, the process proceeds to S208, and in other cases, the process is performed. finish.
In step 208 (S208), the determination unit 460 determines that the specified state is present, and outputs a message to that effect to the drive unit information search unit 422.

In other words, after the main power supply 356 starts supplying power, when the paper is transported for the first time from the paper supply unit and a paper jam occurs, it is considered that the user has stored the paper in the paper supply unit by an incorrect method. Power supply is not interrupted.
In addition, when paper is first transported from the paper feed unit after returning from the power saving mode to the normal mode and a paper jam occurs, it is assumed that the user stored the paper in the paper feed unit in an incorrect way. Power supply is not interrupted.
In addition, when paper is transported for the first time after the paper feed unit is inserted or removed, the user touched the paper stored in the paper feed unit and shifted the paper. Therefore, do not cut off the power supply.
In addition, if the paper is transported for the first time from the paper feed unit after the paper status such as the size and type of paper stored in the paper feed unit has been changed, It is considered that the paper of the size and paper type is stored in the paper feed unit, so that the power supply is not cut off.

The shut-off unit 462 (FIG. 5) receives information on the drive system power supply 34 from the drive unit information monitoring unit 430 and shuts off the supply of power from the drive system power supply 34.
For example, when information indicating the main driving unit power supply 342 is input from the blocking unit 462, the supply of power from the main driving unit power supply 342 is blocked.
The error output unit 464 displays the fact that a paper jam has occurred on the touch panel (not shown) of the image forming apparatus 1 based on the notification that the paper jam has occurred from the paper jam detection unit 420.
Further, the error output unit 464 receives information on the drive system power supply 34 from the drive unit information monitoring unit 430 and displays information on the drive system power supply 34 whose power supply has been cut off on the touch panel of the image forming apparatus 1. .
Further, when the error output unit 464 receives the information of the drive unit 32 from the drive unit information search unit 422, the error output unit 464 refers to the drive unit information storage unit 426 and calculates the number of errors of the drive unit 32.
Further, the error output unit 464 displays the calculated number of errors on a touch panel (not shown) of the image forming apparatus 1 or the like.

The drive unit information erasing unit 466 erases the drive unit information stored in the drive unit information storage unit 426.
The drive unit information erasing unit 466 receives a signal indicating that the sheet has passed the conveyance roll from the sheet sensor provided in the image forming apparatus 1, and displays the drive unit 32 associated with the conveyance roll as the table storage unit 424. Search by referring to.
Further, the drive unit information erasing unit 466 erases the information corresponding to the searched drive unit 32 from the drive unit information storage unit 426.
That is, the number of consecutive times is reset in the searched drive unit 32.

FIG. 9 is a flowchart showing the overall operation (S30) of the image forming apparatus 1 shown in FIG.
As shown in FIG. 9, in step 300 (S300), the control program 42 executed in the image forming apparatus 1 sends a signal indicating that the drive unit information erasing unit 466 has added a transport roll to the image forming apparatus. Judgment is made from the paper sensor provided in 1.
When the drive unit information erasing unit 466 receives a signal indicating that the sheet has added the transport roll from the sheet sensor provided in the image forming apparatus 1, the control program 42 proceeds to the process of S302, and otherwise In this case, the process returns to S300.

In step 302 (S302), the drive unit information erasing unit 466 erases the information of the drive unit 32 that drives the transport roll through which the sheet has passed from the drive unit information storage unit 426.
In step 304 (S304), the control program 42 determines whether the paper jam detector 420 has detected a paper jam.
If the paper jam detector 420 detects a paper jam, the control program 42 proceeds to the process of S306, and otherwise returns to the process of S300.

In step 306 (S306), the determination unit 460 determines whether or not a specified situation is present.
If it is in the designated status, the process proceeds to S316, and otherwise, the process proceeds to S308.

In step 308 (S308), the drive unit information search unit 422 searches for information on the drive unit 32 corresponding to the paper jam pattern, and the drive unit information storage unit 426 stores the drive unit information.
In step 310 (S310), the drive unit information monitoring unit 430 determines whether the drive unit information search unit 422 has searched the same drive unit 32 continuously for a predetermined number of times.
If the drive unit information search unit 422 continuously searches for the same drive unit 32 a predetermined number of times, the process proceeds to S312. Otherwise, the process proceeds to S314.

In step 312 (S312), the blocking unit 462 blocks the supply of power from the drive system power supply 34.
In step 314 (S314), the error output unit 464 refers to the drive unit information storage unit 426 and calculates the number of errors of the drive unit 32.

  In step 316 (S316), the error output unit 464 indicates that a paper jam has occurred, information on the drive system power supply 34 that has cut off the supply of power, the number of errors in the drive unit 32, and the like. (Not shown).

DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus 10 ... Image forming unit 100 ... Laser beam scanning apparatus 102 ... Photosensitive drum 104 ... Cleaning apparatus 106 ... Charger 108 ... Developing device 12 ... Primary transfer device 120: Transfer belt 122 ... Drive roll 124 ... Backup roll 126 ... Primary transfer roll 128 ... Belt cleaner 14 ... First paper feeder 140 ... First 1 sheet feeding storage unit 141... 2nd sheet feeding storage unit 142... 3rd sheet feeding storage unit 143... First extraction roll 144. 3rd extraction roll 146 ... 1st conveyance roll pair 147 ... 2nd conveyance roll pair 148 ... 3rd conveyance roll pair 16 ... Paper conveyance path 160 ... 1st conveyance Roll 162 ... -2nd conveyance roll 164 ... 3rd conveyance roll 168 ... 1st discharge roll 170 ... 2nd discharge roll 172 ... Face up roll 180 ... 1st discharge part 182 ... Second discharge unit 184 ... Third discharge unit 20 ... Secondary transfer device 200 ... Secondary transfer roll 22 ... Fixing device 220 ... Heating roll 222 ... Addition Pressure roll 24... Reverse roll 26... Reverse transport path 260... Transport roll pair 28... Second paper feeder 280. ... 4th conveyance roll pair 300 ... Paper sensor 302 ... Paper sensor 32 ... Drive part 320 ... Fixing drive part 322 ... Main drive part 324 ... First paper feed Drive unit 326... Second paper feed drive unit 328. Third feed unit 330 ... paper supply drive unit 332 ... reversing drive unit 334 ... discharge drive unit 34 ... drive system power supply 340 ... fixing power supply 342 ... main Drive unit power supply 344... First paper feed power supply 346... Second paper feed power supply 348... Third paper feed power supply 350. ... Discharge power supply 356 ... Main power supply
4 ... Control unit 400 ... CPU
402 ... Memory 404 ... Storage device 406 ... Communication IF
408 ... Control IF
410: System bus 42 ... Control program 420 ... Paper jam detection unit 422 ... Drive unit information search unit 424 ... Table storage unit 426 ... Drive unit information storage unit 428 ... Threshold value Storage unit 430 ... Drive unit information monitoring unit 432 ... Main power supply control unit 434 ... Paper feeding device state monitoring unit 436 ... Paper state monitoring unit 438 ... Paper conveyance monitoring unit 440 ... saving Electric power mode control unit 460 ... determination unit 462 ... blocking unit 464 ... error output unit

Claims (7)

Conveying means for conveying the recording medium;
Driving means for driving the conveying means;
Power supply means for supplying power to the drive means;
A counting means for counting the number of occurrences of clogging of a recording medium that has occurred in a case other than a predetermined case;
An image forming apparatus comprising: a power supply control unit configured to cut off the supply of power from the power supply unit when the number of occurrences of the recording medium jamming counted by the counting unit reaches a predetermined number. The transport means has a plurality,
The drive means has a plurality, and the plurality of drive means drive each of the transport means,
The counting means counts the number of occurrences of the recording medium clogging for each driving means for driving the conveying means that has generated the recording medium clogging,
When the number of occurrences of clogging of the recording medium counted for each driving unit by the counting unit reaches a predetermined number, the power supply control unit is configured to supply power to the driving unit from the power supply unit. The image forming apparatus according to claim 1, wherein the power supply is cut off. The power supply means
A drive system power supply for supplying power to the drive means;
A main power supply for supplying power to the drive system power supply,
The counting unit counts the number of occurrences of a recording medium jam that occurs except when the recording medium is supplied to the transport unit for the first time after the supply of power from the main power supply is resumed. Image forming apparatus. A state control means for switching between a normal state and a power saving state that reduces power consumption compared to the normal state;
The counting means counts the number of occurrences of a recording medium jam that occurs except when the recording medium is supplied to the transport means for the first time after the state control means returns from the power saving state to the normal state. The image forming apparatus according to 2. A recording medium supply means for supplying a recording medium to the conveying means;
The counting means counts the number of occurrences of a recording medium clogging that occurs except when the recording medium is transported for the first time from the recording medium supply device after the recording medium supply means is inserted and removed. The image forming apparatus described. 3. The counting unit according to claim 1, wherein the counting unit counts the number of occurrences of the recording medium clogging that occurs except when the recording medium is supplied to the conveying unit for the first time after the size and type of the recording medium are changed. Image forming apparatus. A transport step for transporting the recording medium;
A driving step for driving the conveying means;
A power supply step for supplying power to the driving means;
A counting step for counting the number of occurrences of jamming of the recording medium that has occurred in cases other than a predetermined case;
A program for causing a computer to execute a power supply control step of cutting off the supply of power from the power supply means when the number of occurrences of the recording medium clogging counted by the counting means reaches a predetermined number .

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