JP5958052B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus, and more particularly to a technique for cutting off a power source of an image forming apparatus at an accurate timing.

  Conventionally, for example, a technique described in Patent Document 1 is known as a technique for disconnecting the power source of an image forming apparatus at an appropriate timing. In the prior art document, when a power supply soft switch is turned off, a notification of power-off permission is issued, and when a standby job (standby job) is input for printing, a standby job is printed. Discloses a technique for immediately turning off the power when printing of a standby job is not performed upon completion of printing.

JP 2009-271413 A

  However, in the technology of the above-mentioned prior art document, when an input indicating that the power-off permission is given and the standby job is not printed is received, the power is immediately turned off, and the job being executed is disadvantageous. There was inconvenience to receive. Therefore, as in the prior art document, when receiving an input to print the standby job so that the job being executed is not disadvantaged, the power cannot be turned off until all the printing of the standby job is completed. Then, there is a disadvantage that it takes a relatively long time before the power is turned off.

  The present invention provides a technique capable of reducing the disadvantage of a job being executed by turning off the power at an early stage and turning off the power.

  The image forming apparatus disclosed in the present specification is an image forming apparatus including a power source, a receiving unit that receives a disconnection instruction for disconnecting the power source, and a control unit that controls disconnection of the power source. The job determination process for determining whether there is an execution job being executed and whether there is a standby job waiting for execution when the disconnection instruction is received from the reception unit; If it is determined in the job determination process that there is the execution job, an execution determination process is performed to determine whether the execution job is to be continuously executed, and it is determined in the job determination process that the standby job is present The standby job is not executed, and the power is turned off according to the determination result of the execution determination process.

  According to this configuration, when it is determined that there is an execution job being executed in the job determination process, for example, a facsimile job using the facsimile function, the power is turned on after the facsimile job is ended according to the determination result of the execution determination process. Processing to disconnect can be executed. Even if it is determined in the job determination process that there is a standby job, the standby job is not executed. For this reason, the power can be turned off earlier than in the case where the power cannot be turned off until the job waiting in the prior art is executed. For example, when the execution job is not a facsimile job, it is considered that the disadvantage is not so great even if the power is turned off. Therefore, it is possible to reduce the disadvantages of the job being executed by turning off the power.

  In the image forming apparatus, the control unit executes, as the execution determination process, a facsimile function determination process for determining whether the execution job is a facsimile job using a facsimile function, and the facsimile function determination process includes the facsimile function determination process. When it is determined that the execution job is the facsimile job, the power supply is turned off after the execution of the facsimile job is completed, and when it is determined in the facsimile function determination process that the execution job is not the facsimile job, the execution job If a job cancellation determination process is performed to determine whether to cancel the execution of the execution job according to a progress status of the job, and the job cancellation determination process determines that the execution of the execution job is to be canceled, Stop execution job execution and turn off the power Unishi may be.

  According to this configuration, when the execution job is a facsimile job, the power can be turned off after the execution of the facsimile job is completed. If the execution job is not a facsimile job, the power can be turned off early by giving priority to the process of turning off the power according to the progress of processing of the job.

In the image forming apparatus, the control unit further executes a reception determination process for determining whether or not the data of the execution job is being received in the job cancellation determination process. If it is determined that data is being received, the execution job may be stopped and the power may be turned off.
According to this configuration, when execution job data is being received, it is possible to prioritize the process of turning off the power, and to quickly turn off the power.

  Further, in the image forming apparatus, when the control unit determines that the data is not being received in the reception determination process, the control unit performs a print start determination process for determining whether a print operation of the execution job is started. Further, when it is determined that the printing operation is started by the printing start determination process, the power supply may be turned off after the execution of the execution job is finished.

  According to this configuration, when the printing operation is started when the cutting instruction is received, the power can be turned off after the printing operation is finished.

The image forming apparatus may further include a nonvolatile memory for storing data, and when the control unit determines that the printing operation is not started by the print start determination process, the execution is performed by the nonvolatile memory. When a capacity determination process is performed to determine whether or not a memory capacity for storing job data can be secured, and when it is determined that the memory capacity can be secured by the capacity determination process, the data of the execution job is stored in the nonvolatile memory And the execution of the execution job is stopped and the power supply is turned off. If it is determined that the memory capacity cannot be secured by the capacity determination process, the execution job execution is finished and the power supply is turned off. You may make it do.
According to this configuration, priority can be given to the process of turning off the power or the end of the execution job in accordance with the memory capacity.

The image forming apparatus may further include an error detection unit that detects an error related to the execution of the execution job, and the control unit performs the execution determination process during execution of the execution job as the execution determination process. An error occurrence determination process for determining whether an error has been detected is executed, and a continuation determination process for determining whether to continue the execution of the execution job according to the error detected by the error occurrence determination process And may be further executed.
According to this configuration, for example, when an error occurs during execution of an execution job, it is possible to quickly turn off the power by giving priority to the process of turning off the power according to the content of the error.

In the image forming apparatus, the control unit performs error determination processing in the continuation determination processing to determine whether the error is an error that takes time to cancel the error. When it is determined that the error is not an error that takes time to clear the error, the power supply may be turned off after the execution of the execution job is finished.
According to this configuration, for example, in connection with the occurrence of an error detected during execution of an execution job, for example, when the error is a type of error that takes time to cancel the error, a process of turning off the power is performed. Prioritize and quickly turn off the power.

The image forming apparatus further includes a memory for storing data, and when the control unit determines that the error takes a long time to clear the error by the error determination process, the non-volatile memory performs the execution job. When the capacity determination process for determining whether or not the memory capacity for storing the data can be secured is determined, and the capacity determination process determines that the memory capacity can be secured, the execution job data is stored in the memory. And when the execution of the execution job is stopped and the power is turned off, and the memory determination process determines that the memory capacity cannot be secured, the execution of the execution job is stopped and the power is turned off. Also good.
According to this configuration, when an error occurs, priority can be given to the process of turning off the power or the end of the execution job according to the memory capacity.

  In the image forming apparatus, the control unit executes, as the execution determination process, an information determination process for determining whether there is prediction information for predicting completion of the execution job. If it is determined that there is no prediction information, the execution of the execution job may be stopped and the power may be turned off.

  According to this configuration, when there is no prediction information for predicting completion of an execution job, the power can be turned off early by prioritizing the process of turning off the power.

In the image forming apparatus, when the control unit determines that there is the prediction information in the information determination process, the control unit determines whether or not the execution job takes a predetermined time or more based on the prediction information. Execute the process, and in the time determination process, if it is determined that the execution job is completed for a predetermined time or more, the execution of the execution job is terminated and then the power is turned off to complete the execution job. If it is determined that it takes a predetermined time or more, the execution of the execution job may be stopped and the power may be turned off.
According to this configuration, when there is information for predicting completion of an execution job and it takes a predetermined time or more to complete, priority can be given to the process of turning off the power, and the power can be turned off early.

The image forming apparatus may further include a nonvolatile memory for storing data, and the control unit may secure a memory capacity for storing the data of the execution job by the nonvolatile memory as the execution determination process. When the capacity determination process determines that the memory capacity can be secured, the execution job data is stored in the nonvolatile memory, and the execution job execution is stopped. Then, the power supply may be turned off.
According to this configuration, when the memory capacity of the execution job can be secured, the power supply can be quickly turned off by giving priority to the process of turning off the power supply.

In the image forming apparatus, the control unit executes, as the execution determination process, a facsimile function determination process for determining whether the execution job is a facsimile job using a facsimile function, and the facsimile function determination process. If the execution job is determined to be the facsimile job, the power supply is turned off after the execution of the facsimile job is completed, and if the execution job is determined not to be the facsimile job, the execution job is executed. May be stopped and the power supply may be turned off.
According to this configuration, when the execution job is a facsimile job, the facsimile job can be reliably ended. On the other hand, when the execution job is not a facsimile job, priority can be given to the process of turning off the power, and the power can be turned off early.

  According to the image forming apparatus of the present invention, it is possible to reduce the disadvantage of the job being executed by turning off the power at an early stage and turning off the power.

External perspective view of a multifunction peripheral according to the present invention Block diagram schematically showing the electrical configuration of the MFP The flowchart which shows each process of the power-off control process in Embodiment 1. The flowchart which shows each process of the power-off control process in Embodiment 2. The flowchart which shows each process of the power-off control process in Embodiment 3.

<Embodiment 1>
Next, Embodiment 1 will be described with reference to FIGS.

1. Configuration of MFP A first embodiment shows an example in which the image forming apparatus according to the present invention is applied to a so-called MFP having a printer function, a direct print function, a copy function, a facsimile function, a scanner function, and the like. Note that the image forming apparatus is not limited to a multifunction peripheral, and may be, for example, a printer having only a printer function.

  The multifunction device 1 has an appearance as shown in FIG. 1, for example, and an image forming unit 2, a document reading unit 3, and the like are accommodated in the main body 1 </ b> A of the multifunction device 1. An operation panel 4 is provided at the upper front of the multifunction device 1. The operation panel 4 includes a display unit 4A, various operation buttons 4B, a soft power key 4C, and the like on an LCD or the like.

2. Next, the electrical configuration of the multifunction machine 1 will be described. As shown in FIG. 2, the multi function device 1 includes a CPU 31, a ROM 32, a RAM 33, and an NVRAM (nonvolatile memory) 34. The multifunction device 1 includes, as other memory, for example, a hard disk (not shown) that stores various data.

  The CPU 31 is connected to a network interface 35, a modem 36, an external media control unit 37, an image forming unit 2, a document reading unit 3, an operation panel 4, a power source 5, and the like. The CPU 31 (an example of a control unit) controls each component of the multifunction device 1 while storing the processing result in the RAM 33 or the NVRAM 34 according to the control program read from the ROM 32.

  The ROM 32 stores various control programs for controlling the multifunction machine 1, various settings, initial values, and the like. The RAM 33 and the NVRAM 34 are used as a work area from which various control programs are read or as a storage area for temporarily storing image data. As described later, the NVRAM 34 has a job data storage area 34R having a predetermined capacity for storing an execution job or a standby job when an instruction to turn off the power supply 5 is issued.

  A computer PC or the like is connected to the network interface 35, and mutual data is communicated with an external computer PC via the network interface 35. The modem 36 is connected to a telephone line (not shown), and mutual data is communicated with an external facsimile machine or the like via the modem 36.

  The external media control unit 37 controls the external media storing the photo data when directly printing the photo data of the digital camera. The external media is mounted on, for example, an external media mounting portion (not shown) provided on the operation panel 4.

  The image forming unit 2 includes a known exposure unit, process cartridge, transfer unit, fixing unit, and the like, and forms an image on a predetermined recording medium under the control of the CPU 31. The document reading unit 3 includes a known flat bed unit, ADF (automatic document feeder), a reading head, and the like, and reads a document to generate read data.

  The soft power key 4C on the operation panel 4 accepts a disconnection instruction for disconnecting the power source 5 by the user. The soft power key 4C is an example of a reception unit. The reception unit is not limited to the soft power key 4C. For example, in an image forming apparatus that can receive an instruction to turn off the power supply 5 from a computer PC, the network interface 35 corresponds to a reception unit.

  The power supply 5 receives an AC voltage and generates various DC voltages from the AC voltage. An adapted DC voltage is supplied to each component of the MFP 1. The CPU 31 controls the power supply 5 to be turned off according to the operation of the soft power key 4C.

3. Next, with reference to FIG. 3, the power-off control process when the power is turned off, which is a characteristic configuration of the first embodiment, will be described. The power-off control process is executed by the CPU 31 according to a predetermined program.

  When the user operates the soft power key 4C and receives a disconnection instruction to disconnect the power source 5 from the soft power key 4C (step S10: YES), the CPU 31 determines whether there is an execution job being executed at this time (step S10: YES). Step S15) and whether there is a waiting job waiting for execution (step S20). Steps S15 and S20 correspond to job determination processing.

  Here, the job includes a print job, a direct print job, a copy job, a facsimile (FAX) transmission job, a FAX reception job, a scan job, and the like. Whether or not there is an execution job is determined, for example, based on whether or not the CPU 31 receives an instruction to execute any job via the operation panel 4 or the network interface 35. The determination of whether or not there is a waiting job is made, for example, based on whether or not the printing job is registered in a printing queue that is a list of all printing jobs waiting to be printed.

  When it is determined that there is no execution job (step S15: NO), the power supply 5 is turned off, that is, disconnected (step S75). For example, when the power supply 5 is comprised of a switching power supply, the switching operation of the power supply 5 is stopped and the generation of various DC voltages is stopped.

  On the other hand, when determining that there is an execution job (step S15: YES), the CPU 31 determines whether there is a standby job (step S20). If it is determined that there is a standby job (step S20: YES), it is determined whether the data of the standby job can be stored in the nonvolatile memory (step S25).

  Here, for example, the CPU 31 compares the data amount of the standby job with the free capacity of the job data storage area 34 </ b> R secured in a predetermined area of the NVRAM 34. If it is determined that the standby job data can be stored in the nonvolatile memory (step S25: YES), the standby job data is stored in the job data storage area 34R of the NVRAM 34 (step S30). Here, the nonvolatile memory is not limited to the NVRAM 34, and for example, a hard disk may be used. On the other hand, when it is determined that the standby job data cannot be stored in the nonvolatile memory (step S25: NO), the standby job, that is, the standby job data is deleted (step S35). As described above, in this embodiment, the CPU 31 does not execute the standby job even when it is determined that there is a standby job when the power-off instruction is received.

  If it is determined in step S20 that there is no standby job (step S20: NO), it is determined whether the execution job is a FAX job (step S40: equivalent to execution determination processing and facsimile job determination processing). Here, the FAX job includes a FAX transmission job and a FAX reception job. When it is determined that the execution job is a FAX job (step S40: YES), the execution of the FAX job is continued (step S45). When the execution of the FAX job is completed (step S70: YES), the power supply 5 is turned off. (Step S75).

  On the other hand, when it is determined that the execution job is not a FAX job (step S40: NO), the execution job data that has received the execution instruction, for example, print data of the print job is being received via the network interface 35 here. (Step S50: equivalent to an execution determination process, a job cancellation determination process, and a reception determination process). When it is determined that execution job data, that is, print data is being received (step S50: YES), the reception of the print data is stopped, the received print data is deleted, and the power supply 5 is turned off (step S75). ).

  In this case, when a disconnection instruction for disconnecting the power supply 5 is received, the printing operation has not yet started. Therefore, by canceling the print job halfway, the power supply 5 can be cut off at an early stage, and the disadvantage of the print job being executed by the power supply 5 being cut off is small.

  On the other hand, when determining that the print data is not being received (step S50: NO), the CPU 31 determines whether the print data has been received and the printing operation has been started (step S55: execution determination process). , Equivalent to job cancellation determination process and print start determination process). When it is determined that the printing operation has been started (step S55: YES), the execution of the print job is continued (step S45). When the execution of the print job is completed (step S70: YES), the power supply 5 is turned off. (Step S75). On the other hand, if it is determined that the printing operation has not been started (step S55: NO), it is determined whether the print job data can be stored in the nonvolatile memory (step S60: execution determination processing, job cancellation determination processing, and capacity determination). Equivalent to processing).

  Here, for example, the CPU 31 compares the data amount of the print job with the free capacity of the job data storage area 34R of the NVRAM 34. If it is determined that the print job data can be stored in the nonvolatile memory (step S60: YES), the print job data is stored in the job data storage area 34R of the NVRAM 34. On the other hand, if it is determined that the print data cannot be stored in the nonvolatile memory (step S60: NO), the execution of the print job is continued, that is, the print operation is performed according to the print data (step S45), and the execution of the print job is completed. If it is (step S70: YES), the power source 5 is turned off (step S75).

In the present embodiment, even when the power supply 5 is cut off, as long as the power plug (not shown) of the multifunction machine 1 is connected to a commercial power outlet, the power supply 5 can be operated by operating the soft power key 4C. It is assumed that the power for turning on is secured by, for example, a rechargeable battery or a capacitor.
4). Effects of First Embodiment When the CPU 31 determines that there is a facsimile job (execution job) in the job determination process in step S15, the CPU 31 does not execute the standby job even if there is a standby job. 5 is cut. Therefore, the power supply can be turned off earlier than in the case where the power supply 5 cannot be turned off until the conventional standby job is executed. Further, even when the execution job is a print job and the print data is being transmitted, even if the power supply 5 is turned off, it is considered that the disadvantage is not so great. For this reason, it is possible to reduce the disadvantages of the job being executed when the power supply 5 is turned off.

<Embodiment 2>
Next, Embodiment 2 will be described with reference to FIG. The second embodiment is different from the first embodiment only in part of the power-off control process, and the difference will be described. Therefore, the same steps as those in the power-off control process of the first embodiment are given the same step numbers, and the description thereof is omitted.

  In the second embodiment, a disconnection instruction for disconnecting the power supply 5 is given, and a process is added when an error occurs during execution of a job.

  That is, when it is determined in step S70 of FIG. 4 that the job being executed has not ended (step S70: NO), the CPU 31 determines whether an error has occurred during execution of the job, that is, an error has occurred in the execution job. Is determined (corresponding to execution determination processing and error occurrence determination processing). The determination of the occurrence of an error is made based on a detection signal from a known error sensor such as a paper out detection sensor, a toner out detection sensor, or a jam detection sensor.

  If it is determined that an error has occurred (step S110: YES), it is determined whether the error that has occurred takes time to recover (step S120: equivalent to execution determination processing). Here, for example, if the error that has occurred is out of toner, the average time required to cancel the error is relatively long, so that the out-of-toner error is determined to be an error that takes time to recover. Further, when the error that has occurred is out of paper, the average time required to cancel the error is relatively short, so it is determined that the paper out error is an error that does not take time to recover.

  If it is determined that the generated error is an error that takes time to recover (step S120: YES), it is determined whether or not the data of the execution job can be saved in the nonvolatile memory (step S130). When it is determined that the execution job data can be stored in the nonvolatile memory (step S130: YES), the execution job is stopped and the execution job data is stored in the job data storage area 34R of the NVRAM 34 (step S140). Then, the power source 5 is turned off (step S75). On the other hand, when it is determined that the execution job data cannot be stored in the nonvolatile memory (step S130: NO), the execution job is stopped and the power source 5 is turned off (step S75).

  If it is determined that an error has occurred in the execution job (step S110: YES), the execution job may be canceled and the power supply 5 may be turned off without performing the processing of steps S120 to S140.

4). Effects of Embodiment 2 When an error occurs when an execution job is continuously executed when a disconnection instruction for disconnecting the power supply 5 is issued, for example, in response to the error content, the error can be recovered. When time is required, priority can be given to the process of turning off the power, and the power can be turned off early.

It should be noted that instead of the processing of step S40 and subsequent steps, that is, without performing the processing of steps S40 to S70, the processing of steps S110 to S140 may be performed following the processing of step S20. That is, the CPU 31 simply executes, as an execution determination process, an error occurrence determination process (step S110) for determining whether or not an error is detected during execution of the execution job by the error detection unit. In accordance with the error detected in step S110), a continuation determination process (step S120) for determining whether or not to continue execution of the execution job may be executed.
Even in this case, when an error occurs during execution of the execution job, the power can be turned off early by giving priority to the process of turning off the power according to the content of the error.

<Embodiment 3>
Next, Embodiment 3 will be described with reference to FIG. As in the second embodiment, the third embodiment differs from the first embodiment only in part of the power-off control process, and the differences will be described. Therefore, the same steps as those in the power-off control process of the first embodiment are given the same step numbers, and the description thereof is omitted.

  In the third embodiment, when there is a disconnection instruction to disconnect the power supply 5, the CPU 31 determines whether there is prediction information for predicting completion of the execution job, and whether to execute the execution job continuously according to the determination result. Judge whether or not.

  That is, when there is a disconnection instruction to disconnect the power supply 5, it is determined that there is an execution job (step S15: YES), and after the processing related to the standby job is completed, the CPU 31 has prediction information for predicting completion of the execution job. It is determined whether or not there is (step S210: equivalent to execution determination processing and information determination processing). For example, when the execution job is a print job, the prediction information includes header information (such as the number of printed sheets) included in the print data.

  If it is determined that there is no prediction information, execution of the execution job is stopped (step S230), and the power is turned off (step S75). On the other hand, if it is determined that there is prediction information, it is determined based on the prediction information whether, for example, the number of printed sheets (number of pages) is a predetermined number or more. In other words, it is determined whether or not it takes a predetermined time or more to complete the execution job (step S220: equivalent to execution determination processing and time determination processing).

  If the CPU 31 determines that the number of printed sheets is not greater than the predetermined number, that is, it does not take longer than a predetermined time to complete the execution job (step S220: NO), the execution of the execution job is continued (step S230). After the execution is completed, the power is turned off (step S75). On the other hand, if it is determined that the number of printed sheets is equal to or greater than the predetermined number, that is, it takes more than a predetermined time to complete the execution job (step S220: YES), the execution of the execution job is stopped (step S240) and the power is turned off. (Step S75).

5. Effect of Embodiment 3 When there is prediction information for predicting completion of an execution job, and it takes a predetermined time or more for completion of the execution job, priority is given to the process of turning off the power, and the power can be turned off early. it can.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the power-off control process of FIG. 3, instead of the process after step S40, that is, following the process of step S20, the CPU 31 (control unit) simply executes an execution job using a non-volatile memory as an execution determination process. When the capacity determination process (corresponding to the execution determination process) for determining whether or not the memory capacity for storing the data can be secured is executed, and the capacity determination process determines that the memory capacity can be secured (step S60: (YES), the execution job data may be stored in the nonvolatile memory, and the execution of the execution job may be stopped and the power may be turned off (steps S65 and S75). In this case, if the memory capacity of the execution job can be secured, the power supply can be quickly turned off by prioritizing the process of turning off the power supply.

  (2) In FIG. 3, instead of the processing in step S40 and subsequent steps, that is, following the processing in step S20, the CPU 31 (control unit) simply executes the execution job as a facsimile job using a facsimile function as an execution determination process. A facsimile function determination process (step S40: equivalent to an execution determination process) is executed to determine whether or not there is, and if it is determined in the facsimile function determination process that the execution job is a facsimile job (step S40: YES), the facsimile function is determined. When the execution of the job is finished, the power supply 5 is turned off (steps S45 and S75). When it is determined that the execution job is not a facsimile job (step S40: NO), the execution of the execution job is stopped and the power supply 5 is turned off. You may comprise as follows.

  In this case, if the execution job is a facsimile job, the facsimile job can be reliably terminated. On the other hand, when the execution job is not a facsimile job, priority can be given to the process of turning off the power, and the power can be turned off early.

  (3) The process of step S35 may be omitted. This is because, when the power is turned off, the data of the standby job that is not stored in the nonvolatile memory is naturally deleted.

DESCRIPTION OF SYMBOLS 1 ... Multi-function device, 4 ... Operation panel, 5 ... Power supply, 31 ... CPU, 34 ... NVRAM, 35 ... Network I / F, 36 ... Modem

Claims (6)

A reception unit that receives a power supply and a disconnection instruction to disconnect the power supply; and
A control unit for controlling the power-off ,
Bei to give a,
The controller is
When receiving the disconnection instruction from the reception unit,
Job determination processing for determining whether there is an execution job being executed and whether there is a standby job waiting to be executed;
When it is determined that the execution job is present in the job determination process, an execution determination process is performed to determine whether to continuously execute the execution job;
An image forming apparatus that , when it is determined in the job determination process that there is the standby job, does not execute the standby job and turns off the power according to a determination result of the execution determination process ,
An error detection unit for detecting an error related to execution of the execution job;
The controller is
As the execution determination process, an error occurrence determination process for determining whether an error is detected during the execution of the execution job by the error detection unit,
An image forming apparatus that further executes a continuation determination process for determining whether to continue the execution of the execution job in accordance with an error detected by the error occurrence determination process . The image forming apparatus according to claim 1 .
The controller is
In the continuation determination process, an error determination process is performed to determine whether the error is an error that takes time to cancel the error,
An image forming apparatus that, when the error determination process determines that the error is not an error that takes time to cancel the error, terminates execution of the execution job and then turns off the power. The image forming apparatus according to claim 2 .
A non-volatile memory for storing data;
The controller is
When it is determined by the error determination process that the error takes time to cancel the error, a capacity determination process is performed to determine whether or not the nonvolatile memory can secure a memory capacity for storing the data of the execution job. ,
When it is determined that the memory capacity can be secured by the capacity determination process, the execution job data is stored in the nonvolatile memory, and the execution job is stopped and the power is turned off.
An image forming apparatus that suspends execution of the execution job and turns off the power supply when it is determined that the memory capacity cannot be secured by the capacity determination process. Power and
A reception unit that receives a disconnection instruction to disconnect the power;
A control unit for controlling the power-off,
With
The controller is
When receiving the disconnection instruction from the reception unit,
Job determination processing for determining whether there is an execution job being executed and whether there is a standby job waiting to be executed;
When it is determined that the execution job is present in the job determination process, an execution determination process is performed to determine whether to continuously execute the execution job;
If it is determined in the job determination process that the standby job exists, the standby job is not executed, and
An image forming apparatus that disconnects the power according to a determination result of the execution determination process,
The controller is
As the execution determination process, an information determination process is performed to determine whether there is prediction information for predicting completion of the execution job,
An image forming apparatus that stops execution of the execution job and turns off the power when it is determined that the prediction information is not present in the information determination process. The image forming apparatus according to claim 4 .
The controller is
When it is determined that the prediction information is present in the information determination process, a time determination process is performed to determine whether or not the execution job takes a predetermined time or more based on the prediction information;
In the time determination process,
If it is determined that the execution job does not take more than a predetermined time, the execution job is terminated and the power is turned off.
An image forming apparatus that suspends execution of the execution job and turns off the power when it is determined that the execution job is completed for a predetermined time or more. Power and
A reception unit that receives a disconnection instruction to disconnect the power;
A control unit for controlling the power-off,
With
The controller is
When receiving the disconnection instruction from the reception unit,
Job determination processing for determining whether there is an execution job being executed and whether there is a standby job waiting to be executed;
When it is determined that the execution job is present in the job determination process, an execution determination process is performed to determine whether to continuously execute the execution job;
If it is determined in the job determination process that the standby job exists, the standby job is not executed, and
An image forming apparatus that disconnects the power according to a determination result of the execution determination process,
A non-volatile memory for storing data;
The controller is
As the execution determination process, a capacity determination process for determining whether or not a memory capacity for storing the data of the execution job can be secured by the nonvolatile memory,
When it is determined that the memory capacity can be secured by the capacity determination process, the execution job data is stored in the nonvolatile memory, and the execution job execution is stopped and the power supply is turned off. .

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