JP6778420B2 - Image forming device - Google Patents

Description

The present invention relates to an image forming apparatus such as a facsimile, a printer, and a copying machine.

Conventionally, an image forming apparatus including a paper feed tray or a manual feed tray as a paper tray on which paper is placed and the placed paper can be fed to an image forming unit has been known. The image forming apparatus is configured so that the image forming conditions can be set according to the conditions such as the paper type and the paper size. Specifically, it corresponds to the paper to be fed based on the detection result by the paper size detecting means provided in the paper feed tray or the manual feed tray, the paper type information set by the user by operating the operation panel, and the like. It is set in the image condition.

Patent Document 1 describes the following image forming apparatus. That is, it has a set detection means for detecting that paper has been loaded in the bypass tray. When the set detection means detects that paper is loaded in the bypass tray, it is an image forming device that automatically switches the display on the operation panel from the default screen to the bypass setting screen that sets the paper size and paper type of the bypass tray. ..

Generally, a special paper type such as irregular size paper, thick paper, or OHP paper is set in the bypass tray. When irregular size paper or a special paper type is set in the bypass tray, the user operates the operation panel to input the paper size information and the paper type information. The image forming apparatus stores the input paper size information and paper type information. When a manual feed image formation job that specifies the paper set in the manual feed tray as the paper for forming an image is received, it is set in the manual feed tray under the image formation conditions corresponding to the paper size information and paper type information stored in the storage means. An image is formed on the paper. However, some users may forget to enter the paper size information and paper type information set in the bypass tray. In this case, the paper size information and paper type information stored in the storage means may differ from the paper size and paper type of the paper set in the bypass tray, and a good image is not formed in the manual feed image forming job. There is.

On the other hand, in the image forming apparatus described in Patent Document 1, when the set detecting means detects that the paper is loaded in the bypass tray, the operation panel is displayed, and the paper size and paper type of the bypass tray are displayed from the default screen. Automatically switches to the manual feed setting screen to be set. As a result, the user can be guided to input the paper size and the paper type, and it is possible to prevent forgetting to input the paper size information and the paper type information of the paper set in the bypass tray. As a result, in the manual feed image forming job, an image can be reliably formed under the image forming conditions according to the paper set in the manual feed tray, and a good image can be formed on the paper in the manual feed tray.

However, in the image forming apparatus described in Patent Document 1, each time the paper is set in the manual feed tray as the paper tray, the paper size and paper type information are input, and the paper size of the manual feed tray displayed on the operation panel is used. It is necessary to return the setting screen for setting the paper type to the default screen. Therefore, for a user who sets paper of the same size and paper type in the bypass tray each time, it is necessary to enter the same contents or return the setting screen to the default screen each time the paper is loaded in the bypass tray, which is troublesome. There was a problem that it was troublesome.

The present invention has been made in view of the above problems, its object is to reduce input forgetting the paper size set in the paper tray, and loading paper of the same size as the previous in the paper tray It is an object of the present invention to provide an image forming apparatus capable of preventing annoyance of a user at the time.

To achieve the above object, the invention of claim 1, a paper tray sheet is set, image forming means for forming an image on the paper, an operation unit for accepting an operation, paper size information of the constant type size storage means for storing, and a display unit, after switching to oN from the power OFF, before Symbol of the paper set in the paper tray, the paper length is detected by the sheet length detecting means and the paper width detecting means and a sheet size determined from the paper width, the case where the paper size information stored in the storage means does not correspond, to display the copy possible after corresponding to the display prompting corresponding to the display unit, pairs When responding, it is characterized in that a copy-capable display is performed without displaying a display prompting the response.

According to the present invention, it is possible to suppress forgetting to correspond to the size of the paper loaded in the paper tray, and to prevent the user from being bothered when the paper of the same size as the previous time is loaded in the paper tray.

The schematic block diagram which shows the copying machine which concerns on embodiment. A partial block diagram showing an enlarged part of an image forming portion in the copying machine. A partially enlarged view showing a part of a tandem part composed of four process units in the image forming part. The perspective explanatory view of the image reading unit of the copier. A perspective view of the manual feed tray of the copier. The figure which shows the arrangement position of a plurality of detection sensors provided in a bypass tray. The control block diagram which shows the main control system in this embodiment. The explanatory view which shows the state when the paper (A3 vertical size) detected by the manual feed paper length sensor is set in the manual feed tray. Perspective view when the extension tray is pulled out from the bypass tray and the extension tray is in use. The plan view which shows an example of the display operation part of the image formation system. The figure which shows an example of the default screen. A control flow diagram for pop-up control of the bypass paper setting screen. The figure which shows an example of the manual feed paper setting screen. The figure which shows another example of the manual feed setting screen. The figure which shows the other example of the pop-up of the manual feed setting screen. A control flow diagram for pop-up control of the bypass paper setting screen when the power is turned on or when returning from sleep mode. A cross-sectional view of a manual feed tray provided with a paper type detection sensor. Flow chart of pop-up control of the manual feed paper setting screen with paper type detection by the paper type detection sensor.

Hereinafter, an embodiment in which the present invention is applied to the electrophotographic copying machine 500 as an image forming apparatus will be described.
First, the basic configuration of the copying machine 500 according to the present embodiment will be described.
FIG. 1 is a schematic configuration diagram showing a copying machine 500.
The copying machine 500 includes an image forming unit 1 as an image forming means, a paper feeding device 40, an image reading unit 50, and a manual feed tray 60 as a sheet material placing unit. The image reading unit 50 as an image reading device includes a scanner 150 fixed on the image forming unit 1 and an automatic document transporting device (hereinafter referred to as “ADF”) 51 supported by the scanner 150.

The paper feed device 40 is a pickup that is a sheet delivery rotating body that feeds out the paper P as the sheet material from the two paper feed cassettes 42 as the sheet material loading parts arranged in multiple stages in the paper bank 41 and the paper feed cassette 42. It has a roller 43. Further, it has a separate feeding means 45 or the like that separates the fed paper P and feeds it to the paper feed path 44. Further, it also has a plurality of transport roller pairs 46 and the like for transporting the paper P to the main body side paper feed path 37 as the transport path of the image forming unit 1. Then, the paper P in the paper feed cassette 42 is fed into the main body side paper feed path 37 in the image forming unit 1 and sent to the resist roller pair 33.

Further, the paper P as the sheet material set in the manual feed tray 60 is sent out to the downstream side in the sheet transport direction by the pickup roller 61, and only one sheet P is separated by the separate feeding means 62. Then, the paper is fed into the main body side paper feed path 37 in the image forming unit 1 and sent to the resist roller pair 33. The configuration and operation of the pickup roller 61 and the separate feeding means 62 are the same as those of the pickup roller 43 and the separate feeding means 45 of the paper feeding device 40.

The image forming unit 1 includes an optical writing device 2 as a latent image forming means, and four process units 3K, Y, M for forming toner images of black, yellow, magenta, and cyan (K, Y, M, C). , C, a transfer unit 24 and a paper transfer unit 28 are provided. Further, the resist roller pair 33, the fixing device 34, the switchback device 36, the main body side paper feed path 37, and the like are provided. Then, a light source such as a laser diode or an LED (not shown) arranged in the optical writing device 2 is driven to irradiate the laser light L toward the four drum-shaped photoconductors 4K, Y, M, and C. .. By this irradiation, an electrostatic latent image is formed on the surface of the photoconductors 4K, Y, M, and C, and this latent image is developed into a toner image via a predetermined development process.

FIG. 2 is a partial configuration diagram showing a part of the internal configuration of the image forming unit 1 in an enlarged manner. Further, FIG. 3 is a partially enlarged view showing a part of a tandem portion composed of four process units 3K, Y, M, and C. The four process units 3K, Y, M, and C have almost the same configuration except that the colors of the toners used are different. Therefore, in FIG. 3, the subscripts K, Y, M, and C attached to each code are added. Is omitted.

The process units 3K, Y, M, and C each support the photoconductor 4 and various devices arranged around the photoconductor 4 as one unit on a common support, and form an image of the main body of the copying machine 500. It is removable to the part 1. One process unit 3 has a charging device 5, a developing device 6, a drum cleaning device 15, a static elimination lamp 22, and the like around the photoconductor 4. The copying machine 500 has a so-called tandem type configuration in which four process units 3K, Y, M, and C are arranged to face the intermediate transfer belt 25, which will be described later, so as to be arranged along the endless movement direction. There is.

As the photoconductor 4, a drum-shaped one in which a photosensitive layer is formed by applying a photosensitive organic photosensitive material to a raw tube such as aluminum is used. However, an endless belt-shaped one may be used.

The developing apparatus 6 develops a latent image using a two-component developer containing a magnetic carrier and a non-magnetic toner (not shown). To transfer the toner in the two-component developer carried on the developing sleeve 12 and the stirring unit 7 that conveys the two-component developer housed inside while stirring and supplies the developing sleeve 12 to the photoconductor 4. It has a developing unit 11 of the above.

The stirring unit 7 is provided at a position lower than the developing unit 11, and includes two transport screws 8 arranged in parallel with each other, a partition plate provided between the two transport screws 8, and a developing case 9. It has a toner concentration sensor 10 provided on the bottom surface and the like.

The developing unit 11 includes a developing sleeve 12 facing the photoconductor 4 through the opening of the developing case 9, a magnet roller 13 provided inside the developing sleeve 13 so as not to rotate, and a doctor blade 14 whose tip approaches the developing sleeve 12. ing. The developing sleeve 12 has a non-magnetic, rotatable tubular shape. The magnet roller 13 has a plurality of magnetic poles that are sequentially arranged in the direction of rotation of the developing sleeve 12 from a position facing the doctor blade 14. Each of these magnetic poles exerts a magnetic force on the two-component developer on the developing sleeve 12 at a predetermined position in the rotational direction. As a result, the two-component developer sent from the stirring unit 7 is attracted to and supported on the surface of the developing sleeve 12, and a magnetic brush along the lines of magnetic force is formed on the surface of the developing sleeve 12.

The magnetic brush is regulated to an appropriate layer thickness when passing through the position facing the doctor blade 14 as the developing sleeve 12 rotates, and then is conveyed to the developing region facing the photoconductor 4. Then, the toner is transferred onto the electrostatic latent image by the potential difference between the development bias applied to the developing sleeve 12 and the electrostatic latent image of the photoconductor 4, and contributes to the development. Further, the two-component developer that has formed the magnetic brush, is supported on the developing sleeve 12, and has passed through the developing region returns to the inside of the developing unit 11 as the developing sleeve 12 rotates. After that, it is separated from the sleeve surface by the influence of the repulsive magnetic field formed between the magnetic poles of the magnet roller 13, and then returned to the stirring unit 7. An appropriate amount of toner is supplied to the two-component developer in the stirring unit 7 based on the detection result by the toner concentration sensor 10. As the developing apparatus 6, instead of using a two-component developing agent, one using a one-component developing agent containing no magnetic carrier may be adopted.

As the drum cleaning device 15, a cleaning blade 16 made of an elastic body is pressed against the photoconductor 4, but another method may be used. For the purpose of improving the cleanability, in this example, a contact conductive fur brush 17 that brings the outer peripheral surface into contact with the photoconductor 4 is rotatably provided in the direction of the arrow in the drawing. The fur brush 17 also serves to apply the lubricant to the surface of the photoconductor 4 while scraping the lubricant from a solid lubricant (not shown) to form a fine powder. A metal electric field roller 18 for applying a bias to the fur brush 17 is rotatably provided in the direction indicated by the arrow in the drawing, and the tip of the scraper 19 is pressed against the electric field roller 18. The toner adhering to the fur brush 17 is transferred to the electric field roller 18 to which the bias is applied while rotating in contact with the fur brush 17 in the counter direction. Then, after being scraped from the electric field roller 18 by the scraper 19, it falls on the recovery screw 20. The recovery screw 20 transports the recovered toner toward the end of the drum cleaning device 15 in the direction orthogonal to the drawing surface, and delivers it to the external recycling transport device 21. The recycling transfer device 21 sends the delivered recovered toner to the developing device 6 for recycling.

The static elimination lamp 22 eliminates static electricity on the surface of the photoconductor 4 by irradiation with light. The surface of the statically eliminated photoconductor 4 is uniformly charged by the charging device 5, and then subjected to an optical writing process by the optical writing device 2. In the copying machine 500, as the charging device 5, a charging roller to which a charging bias is applied is rotated while being in contact with the photoconductor 4, but a scorotron that performs a non-contact charging process on the photoconductor 4. A charger or the like may be used.

In FIG. 2 shown above, K, Y, M, C toner images are formed on the photoconductors 4K, Y, M, and C of the four process units 3K, Y, M, and C by the process described so far. Will be done.

A transfer unit 24 is arranged below the four process units 3K, Y, M, and C. The transfer unit 24 moves the intermediate transfer belt 25 stretched by a plurality of rollers endlessly in the clockwise direction in the drawing while abutting on the photoconductors 4K, Y, M, and C. As a result, the primary transfer nips for K, Y, M, and C in which the photoconductors 4K, Y, M, and C come into contact with the intermediate transfer belt 25 are formed. In the vicinity of the primary transfer nips for K, Y, M, and C, the intermediate transfer belt 25 is attached to the photoconductors 4K, Y, M, and C by the primary transfer rollers 26K, Y, M, and C arranged inside the belt loop. It is pressing toward. A primary transfer bias is applied to these primary transfer rollers 26K, Y, M, and C by a power source (not shown). As a result, a primary transfer electric field is formed in the primary transfer nips for K, Y, M, and C to electrostatically move the toner image on the photoconductors 4K, Y, M, and C toward the intermediate transfer belt 25. There is. On the front surface of the intermediate transfer belt 25, which sequentially passes through the primary transfer nip for K, Y, M, and C as it moves in the clockwise direction in the figure, toner images are sequentially formed by each primary transfer nip. It is overlaid and primary transferred. By this superposition primary transfer, a four-color superposition toner image (hereinafter referred to as "four-color toner image") is formed on the front surface of the intermediate transfer belt 25.

A paper transport unit 28 is provided at the lower part of the transfer unit 24 in the drawing, in which an endless paper transport belt 29 is hung between the drive roller 30 and the secondary transfer roller 31 to move the transfer unit 24 endlessly. Then, the intermediate transfer belt 25 and the paper transport belt 29 are sandwiched between the secondary transfer roller 31 and the lower tension roller 27 of the transfer unit 24. As a result, a secondary transfer nip is formed in which the front surface of the intermediate transfer belt 25 and the front surface of the paper transport belt 29 come into contact with each other. A secondary transfer bias is applied to the secondary transfer roller 31 by a power source (not shown). On the other hand, the lower tension roller 27 of the transfer unit 24 is grounded. As a result, a secondary transfer electric field is formed in the secondary transfer nip.

A resist roller pair 33 is arranged on the right side of the drawing of the secondary transfer nip. Further, a resist roller sensor (not shown) is arranged near the inlet of the resist nip of the resist roller pair 33. The paper P conveyed from the paper feed device 40 or the bypass tray 60 toward the resist roller pair 33 is temporarily stopped from being conveyed after a predetermined time when the tip thereof is detected by the resist roller sensor (not shown), and the resist is resisted. The tip is abutted against the resist nip of the roller pair 33. As a result, the posture of the paper P is corrected, and the paper P is ready to be synchronized with the image formation.

When the tip of the paper P abuts on the resist nip, the resist roller pair 33 restarts the roller rotation drive at a timing capable of synchronizing the paper P with the four-color toner image on the intermediate transfer belt 25, and the paper P is secondarily transferred. Send to the nip. In the secondary transfer nip, the four-color toner image on the intermediate transfer belt 25 is collectively secondary transferred to the paper P due to the influence of the secondary transfer electric field and the nip pressure, and combined with the white color of the paper P, a full-color image is obtained. The paper P that has passed through the secondary transfer nip is separated from the intermediate transfer belt 25, held on the front surface of the paper transport belt 29, and transported to the fixing device 34 along with its endless movement.

The transfer residual toner that was not transferred to the paper P by the secondary transfer nip adheres to the front surface of the intermediate transfer belt 25 that has passed through the secondary transfer nip. The transfer residual toner is scraped off by the belt cleaning device 32 in which the cleaning member comes into contact with the intermediate transfer belt 25.

The paper P conveyed to the fixing device 34 is sent from the fixing device 34 to the paper ejection roller pair 35 after the full-color image is fixed by pressurization or heating in the fixing device 34, and then discharged outside the machine. It is discharged to the paper tray 501.

In FIG. 1 shown above, a switchback device 36, which is a paper reversing device, is arranged under the paper transport unit 28 and the fixing device 34. As a result, when double-sided printing is performed, the transport path of the paper P that has been image-fixed on one side is switched to the switchback device 36 side by the switching claw, where the paper P is inverted and the secondary transfer nip is again. Enter into. Then, the other side of the paper P is also subjected to the secondary transfer treatment and the fixing treatment of the image, and then the paper is discharged onto the paper discharge tray 501.

The image reading unit 50 including the scanner 150 fixed on the image forming unit 1 and the ADF 51 fixed on the scanner 150 has two fixed reading units and a moving reading unit 152 described later. The mobile reading unit 152 is arranged directly below the second contact glass 155 fixed to the upper wall of the casing of the scanner 150 so as to come into contact with the document MS, and an optical system including a light source, a reflection mirror, and the like is shown in the drawing. It can be moved in the left-right direction. Then, in the process of moving the optical system from the left side to the right side in the drawing, the light emitted from the light source is reflected by the lower surface of the document MS placed on the second contact glass 155, and then a plurality of reflection mirrors are formed. The light is received by the image reading sensor 153 fixed to the scanner 150.

On the other hand, the image reading unit 50 has a first fixed reading unit 151 arranged inside the scanner 150 and a second fixed reading unit 95 arranged inside the ADF 51 as a fixed reading unit. .. The first fixed reading unit 151 having a light source, a reflection mirror, an image reading sensor such as a CCD, etc. is arranged directly under the first contact glass 154 fixed to the upper wall of the casing of the scanner 150 so as to come into contact with the document MS. ing. Then, when the original MS conveyed by the ADF 51 passes over the first contact glass 154, the light emitted from the light source is sequentially reflected by the first surface of the original MS, and the image is read through a plurality of reflection mirrors. The light is received by the sensor 153. As a result, the first surface of the document MS is scanned without moving the optical system including the light source and the reflection mirror. Further, the second fixed reading unit 95 scans the second surface of the document MS after passing through the first fixed reading unit 151.

The ADF 51 arranged on the scanner 150 includes a document mounting table 53 for mounting the document MS before scanning on the main body cover 52, a document transport section 54 for transporting the document MS as a sheet material, and scanning. It holds a document stack base 55 or the like for stacking later document MSs.

FIG. 4 is a perspective explanatory view of the image reading unit 50.
As shown in FIG. 4, it is supported so as to be swingable in the vertical direction by a hinge 159 fixed to the scanner 150. Then, the swing causes the movement like an opening / closing door to expose the first contact glass 154 and the second contact glass 155 on the upper surface of the scanner 150 in the opened state. In the case of a single-bound original such as a book in which one corner of a bundle of originals is bound, the originals cannot be separated one by one, so that the ADF 51 cannot convey the originals. Therefore, in the case of a single-bound original, the ADF 51 is opened as shown in FIG. 4, and then the single-bound original with the page to be read opened is placed face down on the second contact glass 155, and then the ADF 51 is opened. close. Then, the image of the page is read by the moving reading unit 152 shown in FIG. 1 of the scanner 150.

On the other hand, in the case of a bundle of originals in which a plurality of original MSs, which are independent sheet materials, are simply stacked, the original MSs are automatically conveyed one by one by the ADF 51, and the first fixed reading unit 151 and the ADF 51 in the scanner 150 are automatically conveyed. The second fixed reading unit 95 can be made to read sequentially. In this case, after setting the document bundle on the document placing table 53 as the sheet placing portion, the copy start button 158 of the operation panel 108 is pressed. Then, the ADF 51 sends the document MS of the document bundle placed on the document loading table 53 into the document transport unit 54 in order from the top, and conveys the document MS toward the document stack table 55 while inverting it. In the process of this transfer, immediately after the original MS is inverted, the original MS is passed directly above the first fixed reading unit 151 of the scanner 150. At this time, the image on the first surface of the document MS is read by the first fixed reading unit 151 of the scanner 150.

Next, the configuration of the manual feed tray 60 in this embodiment will be described.
FIG. 5 is a perspective view of the manual feed tray 60 according to the present embodiment.
The manual feed tray 60 as a paper tray in the present embodiment can be stored in the copier 500 by rotating in the direction of the arrow A in FIG. 5 around the rotation axis indicated by the reference numeral B in FIG. When the bypass tray 60 is in the stored state, the bypass tray 60 does not protrude significantly from the outer wall surface of the copying machine 500, so that it does not interfere with users around the copying machine 500. On the other hand, when the user sets the paper P in the manual feed tray 60 and prints, the manual feed tray 60 in the stored state is centered on the rotation axis indicated by the reference numeral B in FIG. 5 in the direction opposite to the arrow A in FIG. By rotating it, it is in the state of use as shown in FIG. Then, the paper P to be used is placed on the mounting surface 60a of the manual feed tray 60 in the used state, and the paper P is set on the mounting surface 60a so that the tip of the paper P is positioned at a predetermined position. ..

The manual feed tray 60 of the present embodiment has two sides as paper width direction regulating members that regulate the positions of both ends in the width direction orthogonal to the conveying direction of the paper P placed on the mounting surface 60a. Fences 63A and 63B are provided. The two side fences 63A and 63B are configured to be slidably movable in conjunction with each other along the slide groove 66 extending in the paper width direction. Specifically, the two side fences 63A and 63B move in opposite directions by the same distance in synchronization with each other with respect to a predetermined paper width direction reference position set substantially in the center of the mounting surface 60a in the paper width direction. It is configured as follows. Therefore, after the paper P to be used is placed on the mounting surface 60a, the side fences 63A and 63B are moved so that the two side fences 63A and 63B come into contact with both ends in the width direction of the paper P, so that any width can be obtained. Even with the paper P having a directional size, the center position in the width direction can be positioned at a predetermined paper width direction reference position.

Further, in the manual feed tray 60 of the present embodiment, the paper length as a sheet length detecting means for detecting the length of the paper P placed on the mounting surface 60a in the transport direction (hereinafter referred to as “paper length”). A sensor 64 is provided. The paper length sensor 64 is composed of a mechanical switch that can be pushed down only by placing about one sheet of paper. Specifically, a projecting portion that projects forward and backward on the mounting surface 60a near the upstream end in the sheet transport direction on the mounting surface 60a of the manual feed tray 60, and the projecting portion pushes down toward the bottom of the mounting surface. It is composed of a press detection unit that detects whether or not it has been performed. As a result, the paper length sensor 64 can detect whether or not the lower surface of the paper P is in contact with or close to the vicinity of the upstream end in the sheet transport direction on the mounting surface 60a of the manual feed tray 60. Therefore, the following can be determined from the detection result of the paper length sensor 64. That is, it is determined whether the paper length of the paper P set in the manual feed tray 60 is shorter or longer than the position of the protruding portion of the paper length sensor 64.

FIG. 6 is a diagram showing arrangement positions of a plurality of detection sensors provided on the manual feed tray 60.
As shown in FIG. 6, the manual feed tray 60 includes a paper set sensor 67 and a paper width sensor 69 in addition to the paper length sensor 64 described above. The paper set sensor 67 is provided near the joint portion between the manual feed tray 60 and the main body of the copying machine 500, and when the paper P is loaded in the manual feed tray 60, the detection signal is output to the control unit 70 (see FIG. 7). To do. Further, the paper width sensor 69 is provided integrally with the side fences 63A and 63B, and outputs the set positions of the side fences 63A and 63B to the control unit 70 as the width of the paper P. As the paper width sensor 69, the paper set sensor 67, and the paper length sensor 64, widely known ones can be used.

FIG. 7 is a control block diagram showing a main control system in the present embodiment.
The detection result of the paper width sensor 69 that detects the position of the two side fences 63A and 63B in the paper width direction and the detection result of the paper length sensor 64 are sent to the control unit 70. Then, from these detection results, the control unit 70 determines which of the plurality of predetermined standard sizes the size (paper length, paper width) of the paper P set in the bypass tray 60 is. It functions as an estimation means for estimating. That is, the control unit 70 detects the paper width of the paper P from the detection result of the paper width sensor 69. Further, from the detection result of the paper length sensor 64, it is determined whether the paper length of the paper P is shorter or longer than the protruding portion position of the paper length sensor 64. From these, the size of the paper P is estimated.

For example, when the protruding portion position of the paper length sensor 64 is set to a position where the rear edge of the paper does not reach when A4 horizontal size paper is loaded in the bypass tray 60, A4 as shown in FIG. When the horizontal size paper P1 is set, the paper length sensor 64 does not detect this. When the manual feed paper length sensor 64 does not detect, the loaded paper can be narrowed down to either the A4 landscape size or the B5 landscape size. Then, from the paper width detected by the paper width sensor 69, it is possible to estimate whether the loaded paper is A4 landscape size or B5 landscape size. Therefore, in the example shown in FIG. 8, it can be appropriately estimated that this is A4 landscape size paper.

On the other hand, when A3 vertical size paper P2 is set as shown in FIG. 9, the protruding portion of the paper length sensor 64 is pushed down by the paper P, and the paper length sensor 64 detects this. When the paper length sensor 64 detects the paper, the loaded paper can be narrowed down to any one of A3 portrait size, A4 portrait size, and B5 portrait size. Then, from the paper width detected by the paper width sensor 69, it is possible to estimate whether the loaded paper is A3 vertical size, A4 vertical size, or B5 vertical size. Therefore, in the example shown in FIG. 9, it can be appropriately estimated that this is A3 vertical size paper.

The storage means 71 shown in FIG. 7 stores paper size information and paper type information set in the manual feed tray 60. For example, in the case of a manual feed job in which the paper set in the manual feed tray 60 is fed to form an image, the control unit 70 inputs the paper size information and the paper type information of the paper set in the manual feed tray 60 from the storage means 71. read out. The control unit 70 performs jam detection, adjustment of the writing start position, and the like based on the read paper size information. Further, for example, the secondary transfer bias and the fixing temperature are controlled based on the read paper type information.

FIG. 10 is a plan view showing an example of the display operation unit of the copying machine 500.
The copying machine 500 is provided with an operation panel 108 on the upper surface as a display operating means that can be operated by the user. As shown in FIG. 10, the operation panel 108 includes a display unit 109 including a liquid crystal display (LCD) as a display means, and a key operation unit (for example, a numeric keypad) 110 as an operation means. The display unit 109 of this example has a touch panel function, and can detect the contact position of the user together with various displays. That is, the display unit 109 of this example also has a function as an operating means.

The bypass tray 60 is often loaded with irregular-sized paper other than standard-sized paper such as A-series paper and B-series paper. Further, the manual feed tray 60 is often set with a special paper type such as thick paper, OHP paper, and glossy paper.

When irregular size paper or a special paper type is set in the bypass tray 60, the user operates the operation panel 108 to input the paper size information and the paper type information set in the bypass tray 60. The control unit 70 stores the input paper size information and paper type information in the storage means 71.

When irregular size paper or a special paper type is set in the bypass tray 60, the user may forget to enter the paper size information or the paper type information. For example, when the manual feed tray 60 is loaded with irregular size paper having a length (paper transport direction) longer than the A3 vertical size shown in FIG. 9, if the user forgets to enter the paper size information, the paper Based on the length sensor 64 and the paper width sensor 69, the apparatus determines that A3 vertical size paper is set in the bypass tray 60. Therefore, in the manual feed job, jam detection is performed based on the A3 vertical size information. As a result, even when the rear end of the A3 vertical size paper is pulled out, the paper detection sensor (not shown) provided in the paper transport path continues to detect the paper, and in fact, no jam has occurred. Nevertheless, it falsely detects that a jam has occurred.

Further, for example, when thick paper is set in the manual feed tray 60 and the user forgets to input the paper type information, the manual feed job performs image formation under the image formation conditions of plain paper. As a result, secondary transfer defects and fixing defects occur.

Therefore, when the paper set sensor 67 detects that the paper has been loaded in the bypass tray 60, the bypass paper setting screen pops up on the display unit 109 of the operation panel 108 from the default screen as shown in FIG. 11, for example. To do. As a result, it is possible to induce the user to input the size information and the paper type information of the paper set in the bypass tray 60, and it is possible to prevent the user from forgetting to input the information.

The pop-up is displayed in the foreground of the display unit 109 (the lower layer screen cannot be operated), and the screen is in an active state (user can be operated). In addition, the manual feed paper setting screen is prevented from transitioning to the next display or moving from the front without the user's operation. In addition, it may be closed after a certain period of time by the user's operation.

However, there are some users who set the same size paper or paper type in the bypass tray 60 every time. In such a user, every time the paper is set in the bypass tray 60, it is necessary to operate the bypass paper setting screen displayed on the display unit 109 to shift to the default screen as shown in FIG. 11 above. There is a problem that it is troublesome and troublesome.

Therefore, in the present embodiment, when it is estimated that the paper having the same paper size as the previous time is set in the bypass tray 60, the bypass paper setting screen is not displayed. A specific description will be given below.

FIG. 12 is a control flow diagram for pop-up control of the bypass paper setting screen of the present embodiment.
As shown in FIG. 12, when the paper set sensor 67 is switched from the OFF state indicating that the paper is not loaded in the bypass tray 60 to the ON state indicating that the paper is loaded in the bypass tray 60 (S1). YES), the size of the paper loaded in the bypass tray 60 is estimated (S2). The control unit 70 estimates the paper size based on the detection results of the paper width sensor 69 and the paper length sensor 64. Next, the control unit 70 compares the estimation result with the paper size information stored in the storage means 71 (S3). As a result of comparison, when the paper sizes are different (YES in S4), the paper size set in the bypass tray 60 has been changed, so that the bypass paper setting screen as shown in FIG. 13 is displayed on the display unit 109. Pops up (S4). When it is detected that the paper size has been changed in this way, the manual feed paper setting screen is displayed to guide the user to enter the paper size and paper type set in the manual feed tray 60. can do. Further, at this time, a notification sound or the like may be used to guide the user to input the paper size and the paper type on the manual feed paper setting screen. As a result, it is possible to prevent forgetting to input the paper size and paper type set in the bypass tray 60.

The manual feed paper setting screen shown in FIG. 13 includes a paper size input screen G1 and a paper type input screen G2. On the paper size input screen, standard size paper estimated from the paper width sensor 69 and the paper length sensor 64 can be selected. When the paper loaded in the bypass tray 60 is a standard size paper, one of the selectable standard size papers is selected. On the other hand, when the paper loaded in the bypass tray 60 has an irregular size, the irregular size is input in the irregular size setting display unit on the right side of the standard size setting display unit. Specifically, when setting the paper length, select the part displayed as horizontal and then enter the size with the numeric keypad. On the other hand, when setting the paper width, select the part displayed as vertical and then enter the size with the numeric keypad.
The paper type input can be set by selecting one of the plurality of paper types displayed on the paper type input screen G2.
The paper size information and paper type information input by the user are overwritten by the storage means 71.

When the paper size information stored in the storage means 71 and the estimation result are the same (No in S4), there is a high possibility that the paper loaded in the bypass tray 60 has the same paper size and the same paper type as the previous time. Therefore, in this case, the process ends without popping up the bypass paper setting screen. As a result, the user who has set the same paper as the previous one can enter the paper size and paper type on the manual feed paper setting screen shown in FIG. 13 above, or select "Cancel" to eliminate the pop-up and the previous figure. The operation of returning to the default screen shown in 11 becomes unnecessary. Therefore, it is possible to provide an easy-to-use image forming apparatus for a user who has set the same paper size and the same paper type as the previous time in the bypass tray 60.

Also, when the user selects the bypass tray from the default screen shown in FIG. 11 (No in S1 and Yes in S5) when the paper set sensor 67 does not detect the set of paper, the bypass paper setting screen is also displayed. Pops up (S5). As a result, after that, the user can be guided to input the size information and the paper type information of the paper set in the bypass tray 60, and it is possible to suppress forgetting to input the paper size information and the paper type information.

The bypass paper setting screen that pops up when the bypass tray 60 is selected when the bypass tray 60 is not set is shown in FIG. 14, and is different from the screen that pops up when the paper size set in the bypass tray 60 is different. You may. As shown in FIG. 14, the bypass paper setting screen that pops up when the bypass tray 60 is selected also displays instructions for setting paper and adjusting the side fence to the paper size. When the user selects "size setting", a screen similar to the paper size input screen G1 shown in FIG. 13 above pops up and the size is input. On the other hand, when "paper type setting" is selected, a screen similar to the paper type input screen G2 shown in FIG. 13 above pops up, and the paper type is input.

When the "Release" button shown in FIG. 14 is pressed, the designation of the bypass tray 60 is canceled, the bypass paper setting screen shown in FIG. 14 disappears, and the screen returns to the default screen shown in FIG. Further, when the paper set sensor 67 detects the paper set and the paper size / paper type information is input, the manual feed paper setting screen disappears and the default screen is restored.

Further, when the input paper size information is a standard size, the control may be performed as follows. That is, if the paper size estimated from the detection results of the paper width sensor 69 and the paper length sensor 64 is different from the input paper size, the display unit 109 indicates that the input paper size information is incorrect. It controls to display that the paper size information is to be input again, such as by displaying it.

Further, in the above description, the bypass paper setting screen pops up on the entire display unit 109, but as shown in FIG. 15, the bypass paper setting screen may pop up on a part of the display unit 109. ..

FIG. 16 is a control flow diagram for pop-up control of the bypass paper setting screen when the power is turned on or when returning from the sleep mode.
The paper loaded in the bypass tray 60 may be replaced while the power of the device is turned off. When the power of the device is OFF, the paper set sensor is not energized, so it cannot be detected that the paper has been replaced.

Further, the image forming apparatus of this embodiment has three modes, an image forming operation mode, a standby mode, and a sleep mode. Here, the image forming operation mode indicates a state in which the image forming apparatus is executing the image forming process. The standby mode indicates a state in which the image forming apparatus is waiting for an execution instruction of the image forming process (image forming operation waiting). The sleep mode indicates a state of low power consumption (standby for image formation operation), which consumes less power than the standby mode. In the sleep mode, if the image forming operation is not performed for a certain period of time, the mode shifts from the standby mode to the sleep mode. When the mode is shifted to the sleep mode, for example, energization of each device such as the fixing device 34 is stopped, and only the control unit 70 is energized. Therefore, even in the sleep mode, since the paper set sensor is not energized, it cannot be detected that the paper has been replaced.

In this way, the paper set in the bypass tray 60 is replaced when the power is turned off or in the sleep mode, and the paper size and the paper type may be changed. Therefore, when the power is turned on or when the sleep mode is restored, it is determined whether or not the bypass paper setting screen is pop-up controlled.

As shown in FIG. 16, the control unit 70 checks whether or not the paper set sensor 67 is ON when the power is turned on or when returning from the sleep mode (S11). If the paper set sensor 67 is ON (Yes in S11) and paper is loaded in the bypass tray 60, the control unit 70 is set in the bypass tray 60 based on the detection results of the paper width sensor 69 and the paper length sensor 64. Estimate the paper size of the paper (S12). Next, the control unit 70 compares the estimation result with the paper size information stored in the storage means 71 (S13). As a result of comparison, when the paper sizes are different (YES in S14), the paper is replaced when the power is turned off or in the sleep mode. Therefore, the manual feed paper setting screen as shown in FIG. 13 is popped up on the display unit 109 (S15).

Further, as shown in FIG. 17, a paper type detection sensor 72 for detecting the paper type of the paper set in the bypass tray 60 is provided, and a manual paper type setting screen is provided based on the detection result of the paper type detection sensor 72. May be determined whether or not to pop up.

The paper type detection sensor 72 shown in FIG. 17 is a reflective photo sensor. For example, transparencies and plain paper have different reflectances. In addition, the whiteness differs between the copy paper and the high-quality paper, and the reflectance differs. Therefore, the paper type can be estimated from the amount of light received by the paper type detection sensor 72.

FIG. 18 is a flow chart of pop-up control of the manual feed paper setting screen to which the paper type detection by the paper type detection sensor is added.
As shown in FIG. 18, when the paper size is the same as the paper size stored in the storage means (No in S24), the paper type detection sensor 72 estimates the paper type (S25). Specifically, the output voltage (light receiving amount) when the paper is detected by the paper type detection sensor 72 is stored in the storage means, and the output voltage of the paper type detection sensor 72 this time and the storage means are stored. Compare with the output voltage. If the output voltage is different than the error range, the type of paper loaded in the bypass tray is different. In this way, when the paper types are different (YES in S26), there is a possibility that a paper size or paper type different from the previous one is set in the bypass tray 60. Therefore, at this time, the manual feed paper setting screen shown in FIG. 13 is popped up to prompt the user to input the paper size information and the paper type information.

Further, a paper thickness detection sensor as a second paper type detection sensor is provided in the vicinity of the separate feeding means 62 on the downstream side in the paper transport direction to detect the thickness of the paper set in the bypass tray and detect the paper thickness. The detection result of the sensor is compared with the paper thickness information stored in the storage means. Then, if the detection result of the paper thickness detection sensor is different from the paper thickness information stored in the storage means, the manual feed paper setting screen is popped up so that the user can input the paper size information or the paper type information. You may induce it. In this case, if the paper size information and the paper type detection sensor 72 are not changed, the highest-ranked paper among the papers set in the bypass tray 60 is conveyed to a position where the tip faces the paper thickness detection sensor. Then, the paper thickness detection sensor detects the thickness of the paper. As the paper thickness detection sensor, a transmissive photo sensor can be used, and the thickness of the paper can be detected by the transmittance.

As described above, by detecting not only the paper size information but also the paper type information (reflectance and thickness) and checking whether the loaded paper is different from the previous one, the paper different from the previous one can be obtained. When it is set, the bypass paper setting screen can be reliably popped up. As a result, it is possible to further suppress the user from forgetting to input the paper size information and the paper type information. Further, when the same paper is set, the manual feed paper setting screen is not popped up, so that the user who sets the same paper every time can be reduced, and a highly convenient image forming apparatus can be provided.

Further, although the embodiment in which the present invention is applied to the manual feed tray 60 has been described above, the present invention may be applied to the paper feed cassette 42 as a paper tray.

The above description is an example, and the present invention exerts a unique effect in each of the following aspects.
(Aspect 1)
A paper tray such as a manual feed tray 60 on which paper is set, an image forming means such as an image forming unit 1 that forms an image on paper, a display unit that displays the contents operated by the user, and an operation unit that accepts operations from the user. Image formation conditions of the image forming means based on the display operating means such as the operation panel 108 having the above and the paper type information and / or size information of the paper loaded in the paper tray input by the user by operating the display operating means. Paper for detecting that the size and / or paper type of the paper loaded in the paper tray has been changed in an image forming apparatus such as a copying machine 500 provided with an image forming condition setting means such as a control unit 70 for setting. When the change detecting means (in this embodiment, the paper length sensor 64, the paper width sensor 69, the control unit 70, etc.) and the paper change detecting means detect a change in the paper, the paper of the paper loaded in the paper tray It is provided with a guiding means (composed of an operation panel 108, a control unit 70, etc.) for guiding the user to input species information and / or size information.
According to (Aspect 1), when paper of the same size and paper type as the previous time is set in a paper tray such as the manual feed tray 60, the paper change detecting means does not detect the paper change. Therefore, at this time, for example, the paper type information of the paper loaded in the paper tray and / or the display for inputting the size information is displayed on the display unit, and the paper type information of the paper loaded in the paper tray and / Or there is no action to guide the user to enter size information. Therefore, in (Aspect 1), unlike the image forming apparatus described in Patent Document 1, the display of the operation content is switched to the default screen in order to input the paper type information and / or the size information of the paper set in the paper tray. There is no need to restore it, such as when it is restored. As a result, it is possible to prevent the user from being bothered when the paper of the same size and paper type as the previous time is loaded in the paper tray.
If paper with a different paper type and size from the previous time is loaded in the paper tray, the paper change detecting means detects the paper change. Therefore, at this time, the paper type information and / or size of the paper loaded in the paper tray is displayed on the display unit for inputting the paper type information and / or size information of the paper loaded in the paper tray. An action occurs that induces information to be input. Therefore, in this case, it is possible to induce the user to input the paper size / paper type information set in the paper tray, and forget to enter the paper size information and paper type information of the paper set in the user's paper tray. It can be suppressed. As a result, an image can be formed on the paper in the paper tray under the image forming conditions corresponding to the paper in the paper tray, and a good image can be formed on the paper in the paper tray.

(Aspect 2)
In (Aspect 1), when the paper change detecting means detects a change in the paper, the guiding means sets the paper in the paper tray such as the manual feed tray 60 on the display unit 109 of the display operating means such as the operation panel 108. The display operation means is controlled so that the operation contents for inputting the species information and / or the size information are displayed.
According to (Aspect 2), when the paper change detecting means detects a change in the paper, the operation content for inputting the paper type information and / or the size information of the paper loaded in the paper tray is displayed on the display unit of the operating means. By being displayed on the 109, the user can be guided to input the paper type information and / or the size information of the paper loaded in the paper tray.

(Aspect 3)
In (Aspect 1) or (Aspect 2), the storage means 71 for storing the paper type and / or size information of the paper input by the user by operating the display operation means such as the operation panel 108 and the paper tray are set. An estimation means for estimating the paper type and / or paper size of the paper (in this embodiment, the paper length sensor 64, the paper width sensor 69, the control unit 70, etc.) is provided, and the paper change detecting means is the estimation means. If the estimation result and the paper size and / or paper type stored in the storage means are different, it is detected that the size and / or paper type of the paper loaded in the paper tray has been changed.
According to (Aspect 3), the paper type and / or paper size of the paper stored in the storage means 71 is set in the paper tray by comparing the paper type and / or paper size of the paper estimated by the estimation means. It is possible to satisfactorily detect that the size and / or paper type of the paper has been changed.

(Aspect 4)
In any one of (Aspect 1) to (Aspect 3), a set detecting means such as a paper set sensor 67 for detecting that paper is set in a paper tray such as a manual feed tray 60 is provided, and the guiding means is a set detecting means. When it is detected that the paper is loaded in the paper tray, the paper change detecting means detects whether the size and / or the paper type of the paper loaded in the paper tray has been changed, and the paper change detecting means of the paper. When a change is detected, the user is prompted to enter the paper type information and / or size information of the paper loaded in the paper tray.
If paper is loaded in the bypass tray 60, the paper may have been changed. Therefore, when it is detected that the paper is loaded in the paper tray by the set detection means such as the paper set sensor 67, the change in the paper can be detected satisfactorily by checking whether or not the paper has been changed by the paper change means. .. As a result, when the paper is changed, the user can be surely guided to input the paper type information and / or the size information of the paper loaded in the paper tray.

(Aspect 5)
In any one of (Aspect 1) to (Aspect 4), a set detection means such as a paper set sensor 67 for detecting that paper is set in a paper tray such as a manual feed tray 60 is provided, and the guiding means determines image data. When returning from sleep mode, which stops the power supply to some configurations when the paper is not received for a long time, if the set detection means detects that paper is loaded in the paper tray, paper change detection is detected. When the size and / or the paper type of the paper loaded in the paper tray is detected by the means and the paper change detecting means detects the change of the paper, the paper type information of the paper loaded in the paper tray and / Or guide the user to enter size information.
According to (Aspect 5), as described using the control flow shown in FIG. 16, in the sleep mode, the energization of the set detection means such as the paper set sensor 67 is also stopped, so that the sleep mode is restored. Occasionally, it cannot be determined whether or not the paper loaded in the paper tray such as the bypass tray 60 has been changed. Therefore, if the set detecting means detects that the paper is loaded in the paper tray when returning from the sleep mode, the size and / or the paper type of the paper loaded in the paper tray by the paper changing means is determined. Check if it has been changed. Then, when a change is detected, the user is guided to input the paper type information and / or the size information of the paper loaded in the paper tray. As a result, even if paper with a different paper type or paper size is loaded in the paper tray in sleep mode, the paper type information and / or size information of the paper loaded in the paper tray is input. You can guide the user to do so. As a result, it is possible to prevent the user from inputting the paper size information or forgetting to input the paper type size. If there is no change in the paper size or paper type, the operation of inducing input of the paper type information and / or size information of the paper loaded in the paper tray does not occur. As a result, it is possible to reduce the time and effort of the user such as returning the display for guiding the user displayed on the operation panel or the like to the default screen, and it is possible to provide a highly convenient image forming apparatus.

(Aspect 6)
In any one of (Aspect 1) to (Aspect 5), a set detection means such as a paper set sensor 67 for detecting that paper is set in a paper tray such as a manual feed tray 60 is provided, and the guiding means is the image forming apparatus. If the set detection means detects that paper is loaded in the paper tray when the power is switched from OFF to ON, the size and / or paper type of the paper loaded in the paper tray by the paper change detection means. When the paper change detecting means detects the change of the paper, the user is guided to input the paper type information and / or the size information of the paper loaded in the paper tray.
According to (Aspect 6), as described in (Aspect 5), when the power is turned off, the paper loaded in the paper tray such as the manual feed tray 60 is changed as described using the control flow shown in FIG. It cannot be determined whether or not it is. Therefore, when the power is switched to ON, if the set detecting means detects that the paper is loaded in the paper tray, the paper changing means checks whether the paper on the paper tray has been changed. Then, when it is detected that the change has been made, the user is guided to input the paper type information and / or the size information of the paper loaded in the paper tray. As a result, when the power is turned off, the paper type information and / or size information of the paper loaded in the paper tray is input even if the paper type and paper size are different from those before the power is turned off. Can be directed to the user to do. As a result, it is possible to prevent the user from inputting the paper size information or forgetting to input the paper type size. If there is no change in the paper size or paper type, the operation of inducing input of the paper type information and / or size information of the paper loaded in the paper tray does not occur. As a result, it is possible to reduce the user's labor such as returning the display for guiding the user displayed on the operation panel or the like to the default screen, and it is possible to provide a highly convenient image forming apparatus.

(Aspect 7)
In any one of (Aspect 1) to (Aspect 6), a set detection means such as a paper set sensor 67 for detecting that paper is set in a paper tray such as a manual feed tray 60 is provided, and the set detection means is provided in the paper tray. If the user operates a display operation means such as the operation panel 108 and selects a paper tray as the paper tray for feeding paper without detecting that the paper has been loaded, the display unit 109 displays the paper. Display for entering the paper type information and / or size information of the paper loaded in the tray.
According to (Aspect 7), when a paper tray such as a manual feed tray 60 is set as a tray for feeding paper before the paper is set, the paper type information of the paper set in the paper tray and / / on the display operation means such as the operation panel 108. Alternatively, since the display for inputting the size information is performed, it is possible to prevent the user from forgetting to input the size information.

(Aspect 8)
Further, in any one of (Aspect 1) to (Aspect 7), the paper tray is a manual feed tray 60 in which paper is manually set.
As described in the embodiment, the bypass tray is likely to be loaded with irregular size paper or paper of a special paper type. In addition, the paper to be loaded is likely to change frequently. Therefore, by adopting the configuration described in (Aspect 1) to (Aspect 5) described above for the manual feed tray 60, it is possible to effectively prevent the user from forgetting to input the paper type information and the paper size information. preferable. In addition, a specific paper is often set in the bypass tray each time. For the user who uses the bypass tray in this way, it is not necessary to input the user's paper type information and paper size information each time, and it is possible to provide a highly convenient image forming apparatus.

1: Image forming unit 60: Manual feed tray 61: Pickup roller 62: Separate feeding means 63A, 63B: Side fence 64: Paper length sensor 67: Paper set sensor 69: Paper width sensor 70: Control unit 71: Storage means 72: Paper type detection sensor 108: Operation panel 109: Display unit

JP 2001-235976

Claims (12)

The paper tray where the paper is loaded and
An image forming means for forming an image on the paper and
And an operation unit that receives an operation,
Storage means for storing paper size information of the constant type size,
Equipped with a display
After switching to ON from the power OFF, the said paper set in the paper tray, and paper size specified from the detected sheet length and sheet width by the paper length detecting unit and the paper width detecting means, stored in said storage means If the paper size information that is does not correspond, after corresponding to the display prompting corresponding to the display unit to display the copy possible, if the corresponding has a display prompting a corresponding to the display unit An image forming apparatus characterized in that a copy-capable display is performed without the need for copying. In the image forming apparatus according to claim 1,
A set detecting means for detecting that paper is loaded in the paper tray is provided.
After switching to ON from the power OFF of the image forming apparatus, said setting detection means, the image forming apparatus characterized that you detected that paper in the paper tray is set. The paper tray where the paper is loaded and
An image forming means for forming an image on the paper and
And an operation unit that receives an operation,
Storage means for storing paper size information of the constant type size,
Equipped with a display
It has a sleep mode that transitions when no image formation is performed for a predetermined time.
After returning from the sleep mode before Symbol of the paper set in the paper tray, and paper size specified from the detected sheet length and sheet width by the paper length detecting unit and the paper width detecting means, stored in said storage means If the paper size information that is does not correspond, after corresponding to the display prompting corresponding to the display unit to display the copy possible, if the corresponding has a display prompting a corresponding to the display unit An image forming apparatus characterized in that a copy-capable display is performed without the need for copying. In the image forming apparatus according to claim 3,
A set detecting means for detecting that paper is loaded in the paper tray is provided.
After returning from the sleep mode, the setting detection means, the image forming apparatus, characterized in that paper in the paper tray is detected that it is set. In the image forming apparatus according to any one of claims 1 to 4.
An image forming apparatus including an operation panel having the operation unit and the display unit . The image forming apparatus according to any請Motomeko 1 to 5 have displacement,
A set detecting means for detecting that paper is loaded in the paper tray is provided.
When the paper tray is selected in a state where the set detecting means has not detected that paper is loaded in the paper tray, the display unit is characterized in that a display prompting the correspondence is displayed. Image forming device. The image forming apparatus according to one of claims 1 to 6 have shifted,
An image forming apparatus, wherein the paper tray is a manual feed tray in which paper is manually set. The image forming apparatus according to one of claims 1 to 7 have shifted,
An image forming apparatus comprising: an image forming condition setting means for setting an image forming condition of the image forming means based on the paper size of the paper set in a paper tray. The image forming apparatus according to one of claims 1 to 8 have shifted,
The display prompting the correspondence is an image forming apparatus, characterized in that a transition is not performed without the operation of the operation unit. The image forming apparatus according to claims 1 to 9 have shifted,
An image forming apparatus characterized in that the display prompting the correspondence is displayed on the display unit in a pop-up manner. The image forming apparatus according to one of claims 1 to 10 have shifted,
The image forming apparatus, characterized in that the paper size information is standard size paper size information received from the operation unit. In the image forming apparatus according to any one of claims 1 to 10.
An image forming apparatus, characterized in that the paper size information is standard size paper size information set in the paper tray.