JP6206356B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus including a sheet feeding cassette (hereinafter referred to as “silent sheet feeding cassette”) in which countermeasures against noise are taken.

  An image forming apparatus, which is a printer, a multifunction printer, a multifunction peripheral device, or a multifunction peripheral (MFP), develops an electrostatic latent image of a document formed on a photoreceptor with toner supplied from a developing device. Then, the toner image is transferred to a sheet taken out from the paper feed cassette and fixed, and the sheet on which the toner image is transferred is discharged from the image forming apparatus. In the process of printing the document on the paper as described above, the roller rotates when the paper is taken out from the paper feed cassette and when the paper is discharged from the image forming apparatus. In recent years, it has become possible to improve the printing speed by increasing the rotation of the roller. However, if the rotation of the roller is made faster, there is a problem that the noise caused by the motor that rotates the roller increases. For this reason, according to recent technology, when it is desired to suppress the noise of the motor, the user performs a quiet setting that can slow down the rotation of the motor. In addition to the motor noise, the image forming apparatus emits noise, and various noise countermeasures are taken. For example, in the image forming apparatus disclosed in Patent Document 1, when the paper is fed from the paper cassette, the rear edge tapping sound generated in the paper cassette and the vicinity thereof is transmitted downstream of the paper cassette in the paper conveyance direction. It is reduced by absorbing by the sound absorbing member loaded in the space.

JP 2007-320676 A

  However, since the image forming apparatus disclosed in Patent Document 1 is loaded with a sound-absorbing member in a space on the downstream side of the sheet feeding direction of the sheet feeding cassette, it takes time to manufacture compared to a normal sheet feeding cassette. For this reason, when all normal sheet feeding cassettes (hereinafter referred to as “normal sheet feeding cassettes”) are replaced with sheet feeding cassettes (hereinafter referred to as “silent sheet feeding cassettes”) as disclosed in Japanese Patent Application Laid-Open No. 2003-260628. There has been a problem that the manufacturing cost of the image forming apparatus becomes high.

  The present invention has been made in view of such a situation, and an object thereof is to provide an image forming apparatus capable of solving the above-described problems.

Images forming apparatus of the present invention, the silent mode and the normal mode is configured to be selected as an operation mode, a silent sheet feed cassette, a silent sheet feed cassette roller for feeding paper from the silent sheet feed cassette, In an image forming apparatus including a normal paper feed cassette and a normal paper feed cassette roller for feeding from the normal paper feed cassette, the normal paper feed cassette roller can be set to a speed slower than the normal paper feed speed. The image forming apparatus includes a control unit having a print job interrupt processing unit, and the print job interrupt processing unit interrupts a print job being executed when executing the interrupt print job, (1) wherein the said case of silent mode is selected as the operation mode, the normal paper feed cassette roller speed is the normal feed rate normal High performance mode to feed paper from the paper cassette, and the speed is set to one of the quiet high performance mode for feeding paper from the silent sheet feed cassette by said silent sheet feed cassette roller a normal feed speed, the interrupt running the print job, (2) when the normal mode is selected as the operation mode, set the high performance mode, and executes the print job of the interrupt, the print job (3) said interrupt When the silent mode is selected as the operation mode, the low noise performance mode for feeding from the normal paper cassette by the normal paper cassette roller whose speed is slower than the normal paper feed speed when the operation mode is selected. And the silent high performance mode is set and the printing is suspended It is characterized in that to perform the job.
Further, when the silent mode is selected as the operation mode, the print job interrupt processing unit sets the silent high performance mode in preference to the high performance mode , and executes the interrupt print job. It is characterized by.
Further, when the silent mode is selected as the operation mode, the print job interrupt processing unit determines whether or not the silent paper feed cassette stores a sheet of the print sheet size of the interrupted print job. When the paper of the printing paper size is stored, the silent high performance mode is set. When the paper of the printing paper size is not stored , the paper stored in the normal paper feeding cassette is If it is a print paper size, the high performance mode is set and the interrupt print job is executed .
Further, the image forming apparatus of the present invention is configured so that a silent mode and a normal mode can be selected as an operation mode, a silent sheet feeding cassette, a silent sheet feeding cassette roller for feeding from the silent sheet feeding cassette, In the image forming apparatus including a normal paper feed cassette and a normal paper feed cassette roller for feeding from the normal paper feed cassette, the normal paper feed cassette roller and the silent paper feed cassette roller have a normal paper feed speed. The image forming apparatus includes a control unit having a print job interrupt processing unit, and the print job interrupt processing unit is executing when executing an interrupt print job. (1) When the silent mode is selected as the operation mode, the speed is the normal paper feed speed. A high performance mode for feeding from the normal paper feed cassette by a normal paper feed cassette roller, and a silent high performance mode for feeding from the silent paper feed cassette by the silent paper feed cassette roller whose speed is the normal paper feed speed. (2) if the normal mode is selected as the operation mode, set the high performance mode, execute the interrupt print job, 3) When the interrupt print job is completed, when the silent mode is selected as the operation mode, the silent high performance mode, and the silent sheet feeding cassette roller whose speed is slower than the normal sheet feeding speed. High silent mode for feeding from the silent paper feeding cassette, and the speed is the normal By the normal feed cassette roller is slower than the paper speed rate set one silent low performance mode-feed from the normal feed cassette is characterized by executing the print job is suspended.
Further, when the silent mode is selected as the operation mode, the print job interrupt processing unit sets the silent high performance mode in preference to the high performance mode, and executes the interrupt print job. It is characterized by.
Further, when the silent mode is selected as the operation mode, the print job interrupt processing unit determines whether or not the silent paper feed cassette stores a sheet of the print sheet size of the interrupted print job. When the paper of the printing paper size is stored, the silent high performance mode is set. When the paper of the printing paper size is not stored, the paper stored in the normal paper feeding cassette is If it is a print paper size, the high performance mode is set and the interrupt print job is executed.

  The present invention reduces the cost by using the silent paper feeding cassette and the normal paper feeding cassette in combination, performs control to automatically use the silent paper feeding cassette and the normal paper feeding cassette, improves the convenience of the user, Provided is an image forming apparatus capable of achieving both improvement in the processing speed of a print job (hereinafter referred to as “performance”).

1 is an external perspective view of an image forming apparatus according to an embodiment of the present invention. 1 is a schematic cross-sectional view showing an internal configuration of an image forming apparatus according to an embodiment of the present invention. FIG. 2 is a control block diagram illustrating a functional configuration of the image forming apparatus according to the embodiment of the present invention. 6 is a flowchart illustrating a flow of a print job interrupt process according to the embodiment of the present invention.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described with reference to the drawings. An image forming apparatus 1 according to the embodiment is an image forming apparatus that forms an image such as a printer, a multifunction printer, a multifunction peripheral device, or a multifunction peripheral. Referring to FIG. A unit 3, a main body unit 4, and an operation unit 5 are provided. The document reading unit 2 is disposed on the top of the main body unit 4, and the document feeding unit 3 is disposed on the top of the document reading unit 2.

  On the front side of the image forming apparatus 1, an operation unit 5 for setting and operating instructions of the image forming apparatus 1 is disposed. The operation unit 5 is provided with a liquid crystal display unit 51 and operation buttons 52. The user operates the operation unit 5 to input an instruction, thereby performing various settings of the image forming apparatus 1 and executing various functions such as image formation. The liquid crystal display unit 51 displays the state of the image forming apparatus 1, displays the image forming status and the number of copies, and can be used as a touch panel to perform various settings such as functions such as double-sided printing and black / white reversal, magnification setting, and density setting. It has become. The operation buttons 52 include a start button for instructing start of image formation, a stop / clear button for instructing to stop image formation, an interrupt button for instructing interruption of image formation, and various settings of the image forming apparatus 1 to a default state. A reset button, a numeric keypad, and the like are provided for use in the process.

  Referring to FIG. 2, the document reading unit 2 includes a scanner 21, a platen glass 22, and a document reading slit 23. The scanner 21 includes a light source 24 using an LED (Light Emitting Diode) and a light receiving unit 25 including a CCD (Charge Coupled Device) line sensor, a CMOS (Complementary Metal Oxide Semiconductor) line sensor, and the like. The unit 3 is configured to be movable in the conveyance direction of the document MS (manuscript). The document reading slit 23 is a slit formed in a direction orthogonal to the transport direction of the document MS by the document feeding unit 3.

  The document feeding unit 3 includes a document placement unit 31, a document discharge unit 32, and a document transport mechanism 33. The document MS set on the document placement unit 31 is sequentially fed out one by one by the document transport mechanism 33, transported to a position facing the document reading slit 23, and then discharged to the document discharge unit 32. The document feeding unit 3 and the document reading unit 2 are connected to each other by a hinge mechanism on the back side of the image forming apparatus 1, and the document feeding unit 3 functions as a platen cover that opens and closes the upper surface of the platen glass 22. . By opening the document feeder 3 upward, the upper surface of the platen glass 22 is opened, and the document MS can be set on the platen glass 22.

  When reading of the document MS is instructed by the operation button 52 of the operation unit 5 in a state where the document MS is not set on the document placement unit 31 or in an opened state where the document feeding unit 3 (platen cover) is opened. A document MS set on the platen glass 22 is read. When reading the document MS placed on the platen glass 22, the scanner 21 is moved to a position facing the platen glass 22, and the document MS set on the platen glass 22 is moved in the sub-scanning direction orthogonal to the main scanning direction. The image data is obtained by scanning while scanning from the sub-scanning direction reference line B, and the obtained image data is output to the control unit 7 (FIG. 3) in the main body unit 4.

  When reading of the document MS is instructed by the operation button 52 of the operation unit 5 in a state where the document MS is set on the document placement unit 31, the document MS conveyed by the document feeding unit 3 is read. The document MS is set on the document placement unit 31 with the front surface (surface from which a document image is read) facing up. Then, the document MS set on the document placement unit 31 is conveyed from the left side by the document feeding unit 3, and the surface of the document MS is guided to a position facing the document reading slit 23. Further, when reading the document MS conveyed by the document feeding unit 3, the scanner 21 is moved to a position facing the document reading slit 23 and is synchronized with the conveying operation by the document feeding unit 3 via the document reading slit 23. Then, the original MS is read to acquire image data, and the acquired image data is output to the control unit 7 (FIG. 3) in the main body unit 4.

  The main body 4 includes a recording unit 6, and includes normal sheet feeding cassettes 41 a and 41 b, a silent sheet feeding cassette 41 c, normal sheet feeding cassette rollers 42 a and 42 b, a silent sheet feeding cassette roller 42 c, and a sheet conveyance path 43. And a transport roller 44 and a discharge roller 45. The normal paper feed cassettes 41a and 41b are paper feed cassettes that store a plurality of sheets of paper P that are not subjected to noise reduction measures. The normal paper feed cassette roller 42 a feeds the paper P from the normal paper feed cassette 41 a one by one to the paper transport path 43. The normal paper feed cassette roller 42b feeds the paper P from the normal paper feed cassette 41b one by one to the paper transport path 43. The silent paper feeding cassette 41c is a paper feeding cassette that stores a plurality of sheets P for which silent countermeasures have been taken, and the silent paper feeding cassette roller 42c conveys the paper P one by one from the silent paper feeding cassette 41c. It goes out to the road 43. The paper P fed to the paper transport path 43 by the normal paper feed cassette rollers 42 a and 42 b or the silent paper feed cassette roller 42 c is transported to the recording unit 6 by the transport roller 44. The transport roller 44 transports the paper P so that the leading edge of the paper P supplied from the normal paper feeding cassette rollers 42a and 42b or the silent paper feeding cassette roller 42c is aligned with the leading edge of the image read from the document. The paper P on which recording has been performed by the recording unit 6 is discharged by a discharge roller 45 into a discharge space 46 formed between the document reading unit 2 and the main body unit 4. As described above, the normal paper feed cassette rollers 42 a and 42 b, the silent paper feed cassette roller 42 c, the transport roller 44, and the discharge roller 45 function as a paper P transport unit. In addition, the normal sheet cassette rollers 42a and 42b are provided with “silent setting” which is half the normal sheet feeding speed (hereinafter referred to as “half speed”). When the “silent setting” is canceled, the speeds of the normal paper feed cassette rollers 42a and 42b return to full (hereinafter referred to as normal paper feed speed = “full speed”).

  The recording unit 6 includes a photosensitive drum 61, a charging unit 62, an exposure unit 63, an image forming unit 64, a transfer unit 65, a fixing unit 66, and a cleaning unit 67. The exposure unit 63 is an optical unit including a laser device, a mirror, and the like. The exposure unit 63 outputs a laser beam based on image data to the photosensitive drum 61 uniformly charged by the charging unit 62 and exposes the photosensitive drum 61. An electrostatic latent image is formed on the surface of the drum 61. The image forming unit 64 is a developing unit that develops the electrostatic latent image formed on the photosensitive drum 61 using toner, and forms a toner image based on the electrostatic latent image on the photosensitive drum 61. The transfer unit 65 transfers the toner image formed on the photosensitive drum 61 by the image forming unit 64 to the paper P. The fixing unit 66 heats the paper P on which the toner image is transferred by the transfer unit 65 to fix the toner image on the paper P. The toner remaining on the photosensitive drum 61 is removed by the cleaning unit 67.

  FIG. 3 is a control block diagram illustrating a schematic control configuration of the image forming apparatus 1. Document reading unit 2, document feeding unit 3, conveyance unit (normal sheet feeding cassette rollers 42a and 42b, silent sheet feeding cassette roller 42c, conveyance roller 44, discharge roller 45), operation unit 5, recording unit 6, storage The unit 8 and the communication unit 9 are connected to the control unit 7 and controlled in operation by the control unit 7. The control unit 7 includes a print job interrupt processing unit 71.

The control unit 7 is an information processing unit such as a microcomputer including a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The ROM stores a control program for controlling the operation of the image forming apparatus 1. The control unit 7 reads out a control program stored in the ROM and develops the control program in the RAM, thereby controlling the entire apparatus according to predetermined instruction information input from the operation unit 5. Further, the control unit 7 can automatically detect paper sizes stored in the normal paper feed cassette 41a, the normal paper feed cassette 41b, and the silent paper feed cassette 41c.
The print job interrupt processing unit 71 is a mode in which a manager performs a print job while suppressing noise from the operation unit 5 (hereinafter referred to as “silent mode”) or a mode in which performance is prioritized over noise (hereinafter, referred to as “silent mode”). When one of the “normal mode” is selected, control is performed to execute the print job in a hurry. Details of the processing of the print job interrupt processing unit 71 will be described later.

  The storage unit 8 is a storage unit such as a semiconductor memory or an HDD (Hard Disk Drive), and stores image data of the document MS read by the scanner 21 as well as various management information and setting information. .

  The communication unit 9 has a function of transmitting / receiving various data to / from a peripheral device 11 such as a personal computer and another image forming apparatus 1a via a network 10 such as a LAN. The communication unit 9 is configured to be connectable to the Internet 13 via the network 10 and the router 12. The communication unit 9 has a function of transmitting / receiving various data to / from various communication devices connected to the Internet 13.

Next, the procedure for setting the operation mode of the image forming apparatus 1 will be described. The operation mode is not set by the user for each print job, but is set by the administrator according to the environment or time zone in which the image forming apparatus 1 is installed.
First, when the administrator selects “operation mode” from the setting items displayed on the touch panel of the liquid crystal display unit 51, “silent mode” or “normal mode” is displayed, and the administrator selects “silent mode” or “ Select "Normal mode". When the operation unit 5 inputs the “silent mode” or “normal mode” selected by the administrator and outputs it to the control unit 7, the control unit 7 stores the “silent mode” or “normal mode” in the storage unit 8. .

  Next, print job interruption processing of the image forming apparatus 1 according to the embodiment of the present disclosure will be described with reference to FIG. When the user sets the number of copies, duplex printing setting, printing paper size, magnification, density, etc. from the touch panel of the liquid crystal display unit 51 and interrupts the print job with the operation button 52, the operation unit 5 sets these settings and prints. A job interrupt is input and output to the control unit 7. When these settings and print job interrupt are input, the control unit 7 activates the print job interrupt processing unit 71, and the print job interrupt processing unit 71 starts print job interrupt processing.

(Step S101)
First, the print job interrupt processing unit 71 interrupts the print job being executed.

(Step S102)
Next, the print job interrupt processing unit 71 extracts the operation mode stored in the storage unit 8.

(Step S103)
Next, the print job interrupt processing unit 71 determines whether or not the operation mode extracted in step S102 is the “silent mode”. When the operation mode is the “silent mode” (Yes in step S103), the process proceeds to step S104. When the operation mode is not “silent mode” (No in step S103), the process proceeds to step S112.

(Step S104)
In step S <b> 103 Yes, the print job interrupt processing unit 71 cancels the “silent setting” of the normal sheet cassette rollers 42 a and 42 b in the “silent mode”. When the “silent setting” is canceled, the normal paper feed cassette rollers 42a and 42b are set to “full speed”.

(Step S105)
Subsequent to step S104 or in step S110, the print job interrupt processing unit 71 extracts the print paper size from the control unit 7.

(Step S106)
Next, the print job interrupt processing unit 71 determines whether or not the paper P of the print paper size is stored in the silent paper feed cassette 41c. When the paper P of the print paper size is stored in the silent paper feed cassette 41c (Yes in step S106), the process proceeds to step S107. When the paper P of the print paper size is not stored in the silent paper feed cassette 41c (No in step S106), the process proceeds to step S108.

(Step S107)
In step S106, the print job interrupt processing unit 71 sets the sheet P to be taken out from the silent sheet feeding cassette 41c. For example, if the printing paper size is “A4 size” and the paper P stored in the silent paper feeding cassette 41c is “A4 size”, the paper P is taken out from the silent paper feeding cassette 41c.

(Step S108)
In step S106, the print job interrupt processing unit 71 sets the paper P to be taken out from the normal paper feed cassette 41a or the normal paper feed cassette 41b in which the paper P of the print paper size is stored. For example, if the printing paper size is “A3 size” and the paper P stored in the normal paper feeding cassette 41b is “A3 size”, the paper P is taken out from the normal paper feeding cassette 41b.

(Step S109)
Next, the print job interrupt processing unit 71 executes an interrupt print job.

(Step S110)
Next, the print job interrupt processing unit 71 determines whether there is an interrupt of another print job. When there is an interruption of another print job (Yes in step S110), the process returns to step S105. When there is no interruption of another print job (No in step S110), the process proceeds to step S111.

(Step S111)
In step S <b> 110 No, the print job interrupt processing unit 71 performs “silent setting” for the normal sheet cassette rollers 42 a and 42 b in which the “silent mode” is cancelled. When “silent setting” is performed, the normal sheet cassette rollers 42a and 42b are set to “half speed”.

(Step S112)
In step S103 No, the print job interrupt processing unit 71 executes the interrupt print job in the “normal mode”.

(Step S113)
Next, the print job interrupt processing unit 71 determines whether there is an interrupt of another print job. When there is an interruption of another print job (Yes in step S113), the process returns to step S112. When there is no interruption of another print job (No in step S113), the process proceeds to step S114.

(Step S114)
Subsequent to step S111 or in step S113, the print job interrupt processing unit 71 resumes the print job interrupted in step S101, and ends the print job interrupt processing.

As described above, the normal paper feed cassette rollers 42a and 42b are configured to be set at a speed slower than the normal paper feed speed, and can execute a print job. When the silent mode is selected, the silent high performance mode in which the sheet is fed from the silent sheet feeding cassette 41c by the silent sheet feeding cassette roller 42c whose speed is the normal sheet feeding speed, or the speeds of the normal sheet feeding cassette rollers 42a and 42b are set. One of the quiet low performance modes in which paper is fed from the normal paper feed cassette 41a or 41b with a setting slower than the normal paper feed speed is executed. When the normal mode is selected, the normal paper feed cassette roller 42a of the normal paper feed cassette 41a or the normal paper feed cassette roller 42b of the normal paper feed cassette 41b is set to the normal paper feed speed and fed from the normal paper feed cassette. Run high performance mode to paper.
Further, when the silent mode is selected when executing the interrupt job, either the silent high performance mode or the high performance mode is executed. If the normal mode is selected when executing the interrupt job, the high performance mode is executed. If the silent mode is selected when executing an interrupt job, the quiet high performance mode is given priority over the high performance mode, but the silent paper cassette stores paper for the interrupt job's print paper size. If not, run high performance mode. When the interruption job is finished, if the silent mode is selected, either the silent high performance mode or the silent low performance mode is executed.
As described above, in the image forming apparatus 1 of the present invention, the cost can be reduced by using the silent sheet feeding cassette 41c and the normal sheet feeding cassette 41a or 41b together, and the silent sheet feeding cassette 41c and the normal sheet feeding cassette 41a. Or control which uses 41b automatically is performed. Further, when an interrupt job occurs when the silent mode is selected as the operation mode, except when the print paper size paper P is not stored in the silent paper feed cassette 41c, You can balance performance. Further, when the operation mode is the normal mode, the silent sheet feeding cassette 41c is not used, so that the expensive silent sheet feeding cassette 41c can be prevented from being consumed.

In the above embodiment, the normal paper feed cassette rollers 42a and 42b are configured to be set to a speed slower than the normal paper feed speed, and the image forming apparatus 1 selects the silent mode when executing a print job. In this case, the silent high performance mode of feeding from the silent sheet feeding cassette 41c by the silent sheet feeding cassette roller 42c whose speed is the normal feeding speed, or the speed of the normal sheet feeding cassette rollers 42a and 42b is the normal feeding speed. It was controlled to execute one of the silent low performance mode in which the paper was fed from the normal paper feeding cassette with a later setting.
However, the present invention is not limited to this, and the silent sheet feeding cassette roller 42c is also configured to be set to a speed slower than the normal sheet feeding speed, and the image forming apparatus 1 selects the silent mode when executing a print job. In this case, the silent high performance mode of feeding from the silent sheet feeding cassette 41c by the silent sheet feeding cassette roller 42c whose speed is the normal feeding speed, and the speed of the silent sheet feeding cassette roller 42c is slower than the normal feeding speed. High quiet mode for setting and feeding from the silent sheet feeding cassette 41c, or low speed for feeding from the normal sheet feeding cassette by setting the speed of the normal sheet feeding cassette rollers 42a and 42b slower than the normal sheet feeding speed. It may be controlled to execute any of the performance modes. Note that the control when executing an interrupt job is the same as in the above embodiment, and when the silent mode is selected, control is performed so as to execute either the silent high performance mode or the high performance mode. The

  Although the embodiment in which the image forming apparatus 1 includes the normal sheet cassette 41a, the normal sheet cassette 41b, and the silent sheet cassette 41c has been described, the present invention is not limited to this, and includes a plurality of silent sheet cassettes. It is also possible.

  The speeds of the normal paper feed cassette rollers 42a and 42b are two stages, full speed and half speed. However, this is an example, and the normal paper feed speed is 2/3, 1/3 full speed, or Multiple stages such as full speed, 3/4, 2/4, 1/4, etc. can be provided.

  Further, the procedure for interrupting a print job from the touch panel of the liquid crystal display unit 51 of the image forming apparatus 1 has been described. However, the peripheral device 11 connected to the network 10 is connected to the image forming apparatus 1 or another image forming apparatus 1a. Even when a print job is interrupted, print job interrupt processing can be executed.

  Such an image forming apparatus according to the present invention reduces the cost by using both the silent sheet feeding cassette and the normal sheet feeding cassette, and cancels the silent setting and executes the urgent job when executing an interrupt print job in the silent setting. By executing the print job and automatically returning the silent setting or restarting the interrupted print job after the rush print job, the convenience of the user and the performance of the print job can be improved.

  As mentioned above, although this invention was demonstrated by specific embodiment, it cannot be overemphasized that the said embodiment is an illustration of this invention and is not limited to this embodiment.

  The present invention is suitable for an image forming apparatus. However, the present invention is not limited to an image forming apparatus, and can be applied to a general apparatus including equipment and processing capable of realizing silence.

DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus 1a ... Image forming apparatus 2 ... Document reading part 3 ... Document feeding part 4 ... Body part 5 ... Operation unit 6 ... Recording unit 7 ... Control unit 8 ... Storage unit 9 ... Communication unit 10 ... Network 11 ... Peripheral device 12 ...... Router 13 ... Internet 21 ... Scanner 22 ... Platen glass 23 ... Original reading slit 24 ... Light source 25 ... Light receiving unit 31... Document placing unit 32... Document ejecting unit 33... Document transport mechanism 41 a... Normal feeding cassette 41 b. ... Silent paper cassette 42a ... Normal paper cassette roller 42b ... Normal paper cassette Roller 42c ··· Silent paper feed cassette roller 43 ··· Paper transport path 44 ··· Registration roller 45 ··· Discharge roller 46 ··· Discharge space 51 ··· Liquid crystal display unit 52... Operation button 61... Photosensitive drum 62... Charging unit 63... Exposure unit 64.・ Transfer unit 66... Fixing unit 67... Cleaning unit 71... Print job interrupt processing unit

Claims (6)

A silent mode and a normal mode can be selected as the operation mode, and a silent paper feed cassette , a silent paper feed cassette roller for feeding from the silent paper feed cassette, a normal paper feed cassette, and the normal paper feed cassette are configured. In an image forming apparatus provided with a normal paper feed cassette roller for feeding paper from a paper cassette,
The normal paper feed cassette roller is configured to be set at a speed slower than the normal paper feed speed,
The image forming apparatus includes a control unit having a print job interrupt processing unit,
The print job interrupt processing section when performing a print job interrupts, interrupts the print job in execution, (1) when the silent mode as the operation mode is selected, the speed is the normal feed speed A high performance mode for feeding from the normal paper feed cassette by the normal paper feed cassette roller, and a silent high speed for feeding from the silent paper feed cassette by the silent paper feed cassette roller whose speed is the normal paper feed speed set one of the performance mode, and executes the print job of the interrupt, the case where the normal mode is selected, to set the high performance mode, the print job of the interrupt as (2) the operation mode (3) When the interrupt print job is completed, the silent mode is set as the operation mode. When selected, the low-speed performance mode in which the paper is fed from the normal paper-feed cassette by the normal paper-feed cassette roller whose speed is slower than the normal paper-feed speed, and the silent high-performance mode are set. And executing the interrupted print job . When the silent mode is selected as the operation mode, the print job interrupt processing unit sets the silent high performance mode in preference to the high performance mode and executes the interrupt print job. The image forming apparatus according to claim 1 . When the silent mode is selected as the operation mode, the print job interrupt processing unit determines whether or not the silent paper feed cassette stores a sheet of the print paper size of the interrupted print job, When the paper of the printing paper size is stored, the silent high performance mode is set, and when the paper of the printing paper size is not stored , the paper stored in the normal paper feeding cassette is the printing paper. The image forming apparatus according to claim 2 , wherein the high performance mode is set for the size and the interrupt print job is executed. A silent mode and a normal mode can be selected as the operation mode, and a silent paper feed cassette , a silent paper feed cassette roller for feeding from the silent paper feed cassette, a normal paper feed cassette, and the normal paper feed cassette are configured. In an image forming apparatus provided with a normal paper feed cassette roller for feeding paper from a paper cassette,
The normal paper feed cassette roller and the silent paper feed cassette roller are configured to be set at a speed slower than the normal paper feed speed,
The image forming apparatus includes a control unit having a print job interrupt processing unit,
The print job interrupt processing section when performing a print job interrupts, interrupts the print job in execution, (1) when the silent mode as the operation mode is selected, the speed is the normal feed speed A high performance mode for feeding from the normal paper feed cassette by the normal paper feed cassette roller, and a silent high speed for feeding from the silent paper feed cassette by the silent paper feed cassette roller whose speed is the normal paper feed speed set one of the performance mode, and executes the print job of the interrupt, the case where the normal mode is selected, to set the high performance mode, the print job of the interrupt as (2) the operation mode (3) When the interrupt print job is completed, the silent mode is set as the operation mode. When selected, the silent high performance mode, the high silent mode for feeding from the silent paper feeding cassette by the silent paper feeding cassette roller whose speed is slower than the normal paper feeding speed, and the speed are the normal feeding speed. One of the silent low performance modes for feeding from the normal paper feed cassette by the normal paper feed cassette roller, which is slower than the paper speed, is set, and the suspended print job is executed. Forming equipment. When the silent mode is selected as the operation mode, the print job interrupt processing unit sets the silent high performance mode in preference to the high performance mode and executes the interrupt print job. The image forming apparatus according to claim 4 . When the silent mode is selected as the operation mode, the print job interrupt processing unit determines whether or not the silent paper feed cassette stores a sheet of the print paper size of the interrupted print job, When the paper of the printing paper size is stored, the silent high performance mode is set, and when the paper of the printing paper size is not stored , the paper stored in the normal paper feeding cassette is the printing paper. 6. The image forming apparatus according to claim 5 , wherein the high performance mode is set for the size and the interrupt print job is executed.

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