JPH06115715A - Copying device - Google Patents

Abstract

PURPOSE:To realize double-side and multiplex operation using an intermediate tray from a manual insertion paper feeding part to enhance usability by detecting a minimum size and a maximum size of paper sheets allowable for setting in the manual insertion paper feeding part to be stored in a memory part, and inputting a size for manual insertion. CONSTITUTION:A cassette 1 as a manual insertion paper feeding part is provided with side regulation plates 3a, 3b. Movement of a main operation detection guide 4 connected to the side regulating plate 3a for regulating one side edge of a paper sheet 2 is detected by a main scanning length detection part 5 including a volume control to detect main scanning length of the paper sheet 2. At this time, paper sheets of a minimum size and a maximum size of paper sheets allowable for setting are successively placed in the cassette 1, the side regulating plates 3a, 3b are adjusted to the paper sheets 2 and output of the main scanning length detection part 5 is stored in a RAM. In the case where manual insertion information is not available, sizes of applicable paper sheets are listed based on calculated paper sheet width and after designation of a size, modes of automatic paper sheet selection, double-side, multiplex and the like are conducted in the cassette 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine having a manual paper feed section.

[0002]

2. Description of the Related Art In recent years, with the widespread use of office automation equipment, copying machines that perform high-performance processing have been commercialized.

In such an apparatus, a center moving function for automatically moving a copied image to the center of a sheet, an automatic scaling function for automatically scaling a copied image according to the size of the sheet, or an original When the size is detected and the automatic paper selection function of automatically selecting and copying the paper having the size is executed, the size of the image and the size of the paper to be copied must be determined in advance. Then, in such a processing mode, the operation from the manual feed unit is prohibited.

[0004]

That is, in the above-mentioned prior art, at the time of automatic paper selection, since the paper size is not determined in the manual paper feed unit, it is not possible to select the paper feed from the manual paper feed unit. Also, when performing double-sided and multiple copying,
For the same reason, the manual paper feed unit is not allowed to be selected, and the manual paper feed unit cannot be used. Therefore, in such a case, it is necessary to always prepare a paper cassette corresponding to a desired paper size, which results in an increase in cost.

Further, when the paper is fed from the manual paper feeding section, the operator can specify the paper size.
Although it is possible to perform automatic paper selection and the like according to the designated size, there is a disadvantage that if the processing is simply performed based on the size designated by the operator, it is not possible to effectively deal with an erroneous input by the operator. Further, in this type of manual paper feeding unit, in general, an irregular size is often fed. Therefore, in order to specify the size described above, the vertical and horizontal dimensions of the irregular size paper are actually measured, and It is necessary to enter a numerical value, which is very annoying.

On the other hand, in the manual paper feeding unit, the paper width can be detected by the regulation plates which guide both sides of the paper, but in this case, only the paper width is known, and therefore the paper size is kept as it is. It is difficult to obtain the sheet size based on the position of the regulation plate because the regulation plate is not always moved in close contact with the sheet.

Therefore, according to the present invention, at the time of double-sided copying, multiplex copying, and automatic paper selection, paper can be fed from the manual paper feeding section, and the paper size can be specified and automatic paper selection can be performed easily. It is an object of the present invention to provide a copying apparatus that can perform various copying.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a sheet width regulating means for regulating the width of a sheet, a sheet width detecting means for detecting a movement of the sheet width regulating means as a voltage value, and a first predetermined size. First storage means for storing the paper width of the paper, second storage means for storing the paper width of the second predetermined size different from the first predetermined size, and the paper stored in each storage means Calculation means for calculating the paper size width based on the size and the value detected by the detection means, and a selectable paper size that can be specified from the calculation result by the calculation means, and a paper size selection for allowing the operator to select the paper size And means.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view of a manual paper feed section showing a paper size detecting device in a first embodiment of the present invention.

The cassette 1 serving as a manual paper feeding unit provided with this paper size detecting device is provided with side regulating plates 3a and 3a.
b, a main scanning detection guide 4, and a main scanning length detecting section 5 are provided.

Paper 2 set in this cassette 1
Are regulated by the side regulation plates 3a and 3b.

FIG. 2 is a block diagram showing the control circuit in this embodiment.

In this figure, the volume 22 is provided in the main scanning length detecting section 5 of the cassette shown in FIG. 1, and the main of the paper 2 set in the cassette 1 is determined by the positions of the side regulating plates 3a and 3b. The scanning length is detected. A voltage 23 of 5.5v is applied to the volume 22.

The A / D converter 26 converts the analog voltage from the volume 22 into a digital value, and in the present embodiment, the 8-bit A / D converter 26 is used.

The CPU 27 controls not only the paper size detecting device but also the entire system of the copying machine, and is connected to the A / D converter 26, the ROM 28, the RAM 29, and the operation display section 31.

The RAM 29 is provided with a power supply for storing data even after the power is turned off, and is also used for backing up data. In addition, the operation display unit 31 performs adjustment of the device, input instructions such as control of the main body, and display of setting status.

FIG. 3 is a front view showing the structure of the main scanning length detecting section 5.

As shown in the figure, the volume 22 for detecting the width of the paper is such that a rack 32 provided with movable contacts slides in the direction of the arrow. In particular, the volume used in this embodiment has a good linearity relationship between the generated voltage and the slide distance. Further, this operating range is adjusted by the reduction gears 33 and 34 so that the operating range of the main scanning length detection guide 4 by the operation of the side regulating plates 3a and 3b is about 90% of the operable range on the volume 22. I am doing it.

Next, a method for detecting the paper size will be described. In order to detect the paper size, it is necessary to make an adjustment in advance. FIG. 4 is a flowchart showing an operation of adjusting the main scanning length (paper width) of the paper size detecting device.

First, in step S401, a sheet having a minimum settable sheet size (A5 width 148.5 mm in this embodiment) is placed in the cassette 1, and the side regulating plates 3a and 3b are aligned with the sheet. The input value of the D converter 26 is R
Store in AM29.

Next, in step S402, a sheet having the maximum settable sheet size (A4 width 297 mm in this embodiment) is placed in the cassette 1, the side regulating plates 3a and 3b are aligned with the sheet, and A / RA the input value of the D converter 26
Store in M29.

In S403, as shown in FIG.
1, the equation of a straight line passing through the two points obtained in S402 is obtained. The equation of the straight line is paper length = a × A / D value + b (1), and from the two points obtained in S401 and S402, a and b
Is stored in the RAM 29. Note that a and b can be calculated by the following equations.

A = (A4-A5) / (ad1-ad0) (2) b = (A4 * ad0-A5 * ad1) / (ad1-ad0) (3) Note that ad0 and ad1 are points. Is the A / D input value of.

Next, a procedure for detecting the paper width (that is, the main scanning length) will be described.

For the above equations (2) and (3), the RAM
The values of a and b stored in 29 and the values of A / D input when the side regulating plates 3a and 3b are set on the paper after setting the paper in the cassette 1 are substituted into the formula (1) to calculate. By doing so, the desired paper width can be detected.

FIG. 6 is a diagram showing a correspondence table for detecting the paper size from the paper width, and FIG. 7 is a flowchart showing the operation for setting the paper size.

In step S701, a paper detection sensor (not shown)
The presence / absence of a paper set is detected by, and if no paper is detected, the presence / absence of manual feed paper size information is checked in S702. If there is no information, the process ends as is. If there is manual feed size information, in S703. , The manual feed size information is reset (initial state), and the process ends.

If there is a sheet in S701,
In S705, the presence or absence of manual feed information is checked. Then, if there is manual feed information, the process ends.

If there is no manual feed information in S705, candidate paper sizes are listed in S706 based on the paper width calculated by the above-mentioned method. Use size as a candidate. In other words, the operator may simply put the paper on the manual paper feed unit and not align the guide plate. Therefore, the paper with a width smaller than the width of the guide plate is listed as a candidate. After this, the process proceeds to S707.

For example, if the paper has a width of A4R, the size of the paper will be A5, A4R, B5R, A5R, and five types without designation.

In step S707, the user is prompted to select which paper is manually fed. Then, in S708, the designated size is displayed.

With this setting, modes such as automatic paper selection, double-sided and multiplex using an intermediate tray can be operated from the manual paper feed section except for the designation.

Next, a second embodiment of the present invention will be described. The configuration of the paper size detecting device and the configuration of the control circuit in this embodiment are similar to those in the first embodiment.

In the first embodiment, when one of a plurality of candidates is selected, the information such as the paper size is stored, but in the second embodiment, when the paper is selected, The width of the selected paper size is compared with the information obtained from the guide regulation plate. If they match, the information is stored as it is, and if they do not match, the selected information is not stored. Memorize as not specified.

Next, a third embodiment of the present invention will be described. The configuration of the paper size detecting device and the configuration of the control circuit in this embodiment are similar to those in the first embodiment.

In the first embodiment, when one is selected from a plurality of candidates, the information such as the paper size is stored, but in the third embodiment, when the paper is selected, Compare the width of the selected paper size with the information obtained from the guide regulation plate.If they match, store the information as they are, and if they do not match, instruct the guide plate to fit on the paper. , After adjusting the guide regulation plate, list the candidates again and select the paper size from them.

FIG. 8 is a flow chart showing the operation. Here, only the differences from FIG. 7 will be described. That is, S801 to S807 are the same as S701 to S707. Further, S810 is the same as S708.

In step S808, the sheet size selected in step S807 is compared with the information from the guide regulation plate, and if they are different, the process proceeds to step S809.

In step S809, an instruction is issued to adjust the guide regulation plate to the width of the sheet. In step S806, the sheet size and the information from the guide regulation plate are compared.
Go to 0.

Next, a fourth embodiment of the present invention will be described.

FIG. 9 is a block diagram showing the outline of the fourth embodiment.

The control device 800 controls the entire copying machine main body 100, and the operation panel 600 sets the copying mode and displays the status. In addition, the state detection unit 900 detects the state of the manual paper feeding unit, and detects the presence or absence of the transfer paper and the paper width of the placed transfer paper.

Next, FIG. 10 is a sectional view showing the structure of the main body of the copying machine.

The system shown in FIG. 10 includes a copying machine main body 100, a circulating automatic document feeder (hereinafter referred to as RDF) 200 for automatically feeding documents, a sorting device or sorter 300, and an automatic computer form feed. The device (hereinafter, referred to as CFF) 400 and these RDF
The 200, the sorter 300, and the CFF 400 can be freely combined with the main body 100 for use.

The original table glass 101 constitutes an original table, and the optical system 102 is composed of an original illumination lamp (exposure lamp) 103, a scanning mirror, a lens, a motor 104, etc. as an image reading means. Then, the original is illuminated by the exposure lamp 103 while being scanned by the motor 104, and the reflected light from the original is applied to the photosensitive drum 105 by the scanning mirror and the lens.

Around the photosensitive drum 105, a high voltage unit 106, a blank exposure unit 107, a potential sensor 108, a developing device 109, and a transfer charger 110.
And a separation charger 111 and a cleaning device 112, and the photosensitive drum 105 and the like constitute an image recording unit.

The photosensitive drum 105 is composed of the main motor 11
3 rotates in the direction of the arrow shown in FIG.
It is corona-charged by the high-voltage unit 106, and an electrostatic latent image is formed when the reflected light of the document is emitted from the optical system 102. This electrostatic latent image is developed by the developing device 109 and visualized as a toner image.

On the other hand, the transfer paper sent from the upper cassette 114 or the lower cassette 115 through the pickup rollers 116 and 117 into the main body 100 by the paper feed rollers 118 and 119 is transferred to the front end of the toner image and the transfer paper by the registration roller 120. After being timed so that the front end of the toner image coincides with that of the toner image, the toner image is fed to the photosensitive drum 105, and the toner image is transferred by the transfer charger 110.

After this transfer, the transfer paper is separated from the photosensitive drum 105 by the separation charger 111, and the transfer belt 12
It is guided to the fixing device 122 by 1 and fixed by pressure and heating, and then discharged to the outside of the main body 100 by the discharge roller 123. The surface of the photosensitive drum 105 is cleaned by the cleaning device 112.

The main body 100 is equipped with a deck 124 capable of accommodating, for example, 4000 sheets of transfer paper. The lifter 125 of the deck 124 ascends according to the amount of transfer paper so that the transfer paper always contacts the paper feed roller 126. In addition, a multi-purpose manual insertion portion 15 that can store 100 sheets of transfer paper
0 is equipped.

Further, the paper discharge flapper 127 switches the path between the double-sided recording side or the multiple recording side and the discharge side (sorter 300), and the transfer paper sent from the discharge roller 123 is discharged by the discharge flapper 127. It can be switched to the double-sided recording side or the multiple recording side. In addition, the lower conveyance path 128 guides the transfer paper sent from the discharge roller 123 to the re-feed tray 130 by reversing the transfer paper via the reversing path 129.

The multiple flapper 131 switches between double-sided recording and multiplex recording paths. By tilting this to the left, the transfer paper is not passed through the reverse path 129,
Directly to the lower transport path 128. The roller 132 has a path 1
A discharge roller that feeds the transfer paper to the photosensitive drum 105 side through 33. The roller 134 is used for the paper ejection flapper 12.
7 is a discharge roller that is disposed in the vicinity of 7 and discharges the transfer sheet switched to the discharge side by the discharge flapper 127 to the outside of the machine.

At the time of double-sided recording (double-sided copying) or multiplex recording (multiplex copying), the discharge flapper 127 is raised and the copied transfer sheet is turned upside down via the transport paths 129 and 128, and the re-feed tray is provided. Store in 130. At this time, the multiple flapper 131 is tilted to the right during double-sided recording, and the multiple flapper 131 is tilted to the left during multiple recording. At the time of next-side recording or multiplex recording to be performed next, the transfer sheets stored in the re-feed tray 130 are guided to the registration rollers 120 of the main body via the path 133 by the sheet feeding roller 132 one by one from the bottom.

When the transfer paper is reversed and discharged from the main body, the paper discharge flapper 127 is raised and the flapper 131
To the right, the copied transfer paper is conveyed to the conveyance path 129 side, and after the rear end of the transfer paper has passed the first feed roller 140, it is conveyed to the second feed roller side by the reversing roller 142. The transfer roller is turned over by the discharge roller 134 and discharged to the outside of the machine.

FIG. 11 is a block diagram showing the configuration of the control device 800 of this embodiment.

The CPU 801 controls the entire copying machine, the ROM 802 is a read-only memory that stores the control procedure (control program) of the copying machine main body 100, and the CPU 801 controls the control stored in the ROM 802. According to the procedure, each constituent device connected via the bus is controlled. The RAM 803 is a random access memory that is a main storage device used as a storage area for input data, a storage area for work, and the like.

The I / O 804 is the main motor 11
It outputs a control signal of the CPU 801 for loads such as 3 or inputs a signal of the sensor 122 or the like and sends the signal to the CPU 801.

FIG. 12 is a plan view showing an example of the arrangement of keys on the operation panel 600 described above.

In the figure, an asterisk (*) key 60
1 is for the operator (user) to set the binding margin amount,
It is used in the setting mode such as size setting for erasing the original frame. The cursor key 627 is used when selecting a setting item in the setting mode. The OK key 628 is used to confirm the setting contents in the setting mode.

The all reset key 606 is pressed to return to the standard mode. The key 602 is also pressed when returning from the auto shutoff state to the standard mode.

Copy start key 605
Is pressed to start copying. The clear / stop key 604 functions as a clear key during standby (standby) and as a stop key during copy recording. This clear key is also used to cancel the set number of copies. The stop key is pressed to interrupt continuous copying. After the copying at the time of pushing is completed, the copying operation is stopped.

The numeric keypad 603 is pressed when setting the number of copies. It is also used when setting the asterisk (*) mode. The memory key 619 is used when the mode frequently used by the user is registered. Here, M1
You can register four modes of M4.

The copy density keys 611 and 612 are pressed to manually adjust the copy density. The AE key 613 is
Press to adjust the copy density automatically according to the density of the original, or to cancel the AE (automatic density adjustment) and switch the density adjustment to manual.

The copy paper selection key 607 is pressed to select the upper paper lifter 119, the lower paper lifter 115, the paper deck 124, and the multi-manual feed section 150.
When a document is placed on the RDF 300, APS (automatic paper cassette selection) can be selected with this key 607. When APS is selected, a cassette having the same size as the original is automatically selected.

The same size key 610 is pressed to make a copy of the same size (actual size). The automatic scaling key 616 is pressed to automatically reduce or enlarge the image of the original according to the designated transfer paper size.

The double-sided key 626 is pressed to make a double-sided copy from a single-sided original, a double-sided copy from a double-sided original, or a single-sided copy from a double-sided original. The binding margin key 625 can create a binding margin of a designated length on the left side of the transfer paper.
The photo key 624 is pressed when copying a photo original. The multiplex key 623 is pressed when creating (combining) images from the two originals on the same surface of the transfer paper.

The document frame erase key 620 is pressed when the user erases the frame of a standard size document, and the size of the document is set by the asterisk key 601 at that time. The sheet frame erasing key 621 is pressed to erase the frame of the original according to the copy paper size.

The front cover mode setting key 629 is used to create a front cover, a back cover, and insert a slip sheet. The page continuous copy key 630 is used to continuously copy the left and right pages of a two-page spread book.

A paper discharge method selection key 614 is a key for selecting a staple sort, sort, and group discharge method. When the stapled sorter is connected to the recorded paper, a staple sort mode, a sort mode, You can select the group mode or cancel the selection mode.

The reservation key 631 is used when starting the setting of the copy mode for the reserved document placed on the reservation tray 210 and when canceling the reservation setting. The reservation setting key 632 is used as a confirmation key when setting the reservation mode.

The guide key 633 is used when displaying the explanation of the function corresponding to various keys on the message display 701.

The message display 701 is an LCD type display for displaying information relating to copying, and displays characters and figures with 96 × 192 dots. For example, the number of copies set with the ten-key pad 603, the standard variable magnification keys 608 and 609, the equal magnification key 610, the zoom key 617,
The copy magnification set in 618, the paper size selected by the paper selection key 607, a message indicating the state of the copying machine main body 100, a guide message indicating the operating procedure, and other setting contents of various modes are displayed.

The AE display 704 is an LE that lights up when AE (automatic density adjustment) is selected with the AE key 613.
D and the like, and the preheat indicator 709 is an LED or the like that lights up in the preheat state.

When the RDF 300 is used in the standard mode, the number of copies is one, the density AE mode, automatic paper selection, normal magnification, single-sided copy to single-sided copy are set. In the standard mode when the RDF300 is not used,
The settings are 1 copy, 1 density manual mode, 1-sided copy, 1-sided copy from 1-sided original. The difference between when the RDF 300 is used and when it is not used is determined by whether or not a document is set in the RDF 300.

Next, details of this embodiment will be described.
First, the state detecting means 900 of the manual paper feeding unit will be described.

FIG. 13 is a plan view showing the structure of the multi-manual feed unit 150. The sheet regulation guide 151 has a slidable structure and regulates the lateral width of the transfer sheet placed on the manual feed tray 152. A width detection volume 153 is connected to the paper regulation guide 151, and linearly detects from the minimum mountable paper size to the maximum mountable paper size. The paper size width detected by the width detection volume 153 is
Analog voltage from 0v to 5v, control CPU8
01 performs A / D conversion and calculates a paper size group based on the conversion table shown in FIG.

The sensor 154 is for detecting the presence or absence of paper, and is turned on when a transfer paper is placed on the manual feed tray 152, and turned off when there is no transfer paper. This detection signal is input to the CPU 801.

Next, a paper size designation method for designating the paper size of the copy paper placed on the manual paper feed section will be described.

When the multi-manual feed section 150 is selected by the copy paper selection key 607, a paper size designation request message is displayed on the display 701 as shown in FIG. Further, the paper size display portion 702 displays the paper size to be selected.

By pressing the cursor key 627,
A paper size is sequentially selected from a predetermined paper size group and displayed. This paper size group is calculated from the paper size width detected by the width detection volume 153.

When the desired paper size is selected, the OK key 628 is pressed to fix the paper size.

FIG. 16 is an LCD screen when a cassette is selected, and the size (A4) registered in the manual feed size is displayed on the display (M-A4) of the display unit 704.

Next, FIG. 17 is a flow chart for explaining the control operation of this embodiment.

First, it is determined whether or not manual feed is selected with the copy paper selection key 607 (S2001). When manual feed is selected, the manual feed size designation mode is entered (S2).
002), the RAM 80 at the position of the display unit 704 in FIG.
The size stored in the manual feed size buffer 3 is displayed (S2003).

Next, the size group associated with the manual feed width detection volume 153 is sequentially displayed on the LCD display 701 by operating the cursor key 627, and the completion of the manual feed designation by the OK key 628 is awaited (S2004). Then, after this end, the designated size is stored in the manual feed size buffer and is displayed at the position of the display unit 703 of the LCD 701 (S2005), and the process ends.

Next, FIG. 18 is a flow chart for explaining the control operation in the fifth embodiment of the present invention.

First, it is determined whether or not the copy paper selection key 607 is pressed (S2011), the cassette selection screen shown in FIG. 16 is displayed (S2022), and at this time, the manual feed size buffer 704 is displayed at the manual feed display position 704. The size is displayed (S2023), and the process ends.

[0088]

As described above, according to the present invention,
When the operator inputs the manual feed size, the manual feed unit can perform double-sided and multiplex operations using the intermediate tray, and automatic paper selection allows paper to be fed from the manual feed unit.

Further, according to the present invention, by providing the display means for displaying the paper size stored in the storage means for storing the paper size designated by the paper size designating means, every time the manual paper feeding means is used. It is not necessary to set the paper size for the first time, and it is possible to prevent miscopying and paper jam due to the difference between the set paper size and the placed paper size.

[Brief description of drawings]

FIG. 1 is a plan view of a manual paper feeding unit showing a paper size detecting device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a control circuit in the first embodiment.

FIG. 3 is a front view showing a configuration of a main scanning length detection unit in the first embodiment.

FIG. 4 is a flowchart showing a main scanning length adjusting operation of the paper size detecting apparatus in the first embodiment.

FIG. 5 is a schematic diagram illustrating a principle of obtaining a straight line formula for calculating an arbitrary sheet width from the minimum value and the maximum value of the sheet width in the first embodiment.

FIG. 6 is a schematic diagram showing a correspondence table for detecting the paper size from the paper width in the first embodiment.

FIG. 7 is a flowchart showing an operation of setting a paper size in the first embodiment.

FIG. 8 is a flowchart showing an operation in the third embodiment of the present invention.

FIG. 9 is a block diagram showing an outline of a fourth embodiment of the present invention.

FIG. 10 is a sectional view showing the structure of a copying machine main body in the fourth embodiment.

FIG. 11 is a block diagram showing a configuration of a control device of the fourth embodiment.

FIG. 12 is a plan view showing an example of a key arrangement configuration on the operation panel of the fourth embodiment.

FIG. 13 is a plan view showing the configuration of the multi-manual insertion portion of the fourth embodiment.

FIG. 14 is a schematic diagram showing a conversion table for calculating a paper size group in the fourth embodiment.

FIG. 15 is a schematic diagram showing a display screen in the fourth embodiment.

FIG. 16 is a schematic diagram showing another display screen in the fourth embodiment.

FIG. 17 is a flowchart showing an operation in the fourth embodiment.

FIG. 18 is a flowchart showing an operation in the fifth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cassette, 2 ... Paper, 3a, 3b ... Side regulation plate, 4 ... Main scanning detection guide, 5 ... Main scanning length detection part, 22 ... Volume, 26 ... A / D converter, 27 ... CPU, 28 ... ROM , 29 ... RAM, 31 ... Operation display section.

Claims (9)

[Claims] 1. A paper width regulating means for regulating the width of the paper;
A paper width detecting means for detecting the movement of the paper width regulating means as a voltage value; a first storing means for storing the paper width of a paper of a first predetermined size; and a second storage different from the first predetermined size. Second storage means for storing the paper width of the paper of a predetermined size; calculation means for calculating the paper size width based on the paper size stored in each storage means and the detection value by the detection means; and the calculation means And a paper size selecting means for displaying to the operator a selectable paper size that can be specified from the calculation result in (1) and selecting the paper size. 2. The paper size selection means according to claim 1, wherein the paper size equal to or smaller than the paper width size calculated by the calculation means is set as a selection candidate, and this is displayed and the operator is allowed to select it. Copying device. 3. The paper size selection means according to claim 2, further comprising warning means for issuing a predetermined warning when the paper size selected by the operator does not correspond to the calculated paper width size. Characteristic copying machine. 4. The paper size selection means according to claim 2, wherein when the paper size selected by the operator does not correspond to the calculated paper width size, the paper size is treated as a paper size that is not a standard size. A copying machine characterized by: 5. A copying apparatus having a manual paper feeding means, an image forming control means for controlling an image forming operation; a paper size designating means for designating a paper size of a copy paper placed on the manual paper feeding means. A copying apparatus comprising: a storage unit that stores the paper size designated by the paper size designation unit; and a display unit that displays the paper size stored in the storage unit. 6. The copying apparatus according to claim 5, wherein the manual sheet feeding unit has a configuration capable of loading a plurality of sheets. 7. The copying apparatus according to claim 5, wherein the display means is a liquid crystal display device. 8. The display unit according to claim 5, further comprising a plurality of sheet feeding units and a selection unit for selecting one sheet feeding unit from a plurality of sheet feeding units including the manual sheet feeding unit. Is displayed only when the manual feeding means is selected by the selecting means. 9. The display device according to claim 5, further comprising a plurality of paper feeding means and a selection means for selecting one paper feeding means from a plurality of paper feeding means including the manual paper feeding means. Is displayed regardless of the paper feeding means selected by the selecting means.