JPS6370868A - Copying machine - Google Patents

Abstract

PURPOSE:To execute copying at an arbitrary time point and by an arbitrary magnification, and also, to execute a calculation of the copying magnification by a copying machine, by setting the copying magnification by a simple operation. CONSTITUTION:First magnification setting key groups 95-98 set arbitrarily the magnification, and in a state that a switching key 99 has been operated, and a control mode of a copying machine has been switched to a first magnification setting mode, when one key is operated, a numerical value which has been inputted by ten keys and displayed on a display device is stored as the copying magnification in a memory area corresponding to its key. As for second magnification setting key groups 100-103, a prescribed copying magnification is set in advance to its corresponding memory area, and without setting the numerical value as in case of the first key group, a copying operation can be executed, based on the numerical value which has been preset. Accordingly, as for the copying magnification which is preset, the magnification which is always considered to be used frequently is selected.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a copying machine with variable copying magnification.

The copying machine of the present invention corrects and displays the calculated copying magnification.

[Prior Art] Conventionally, copying machines capable of adjusting copying magnification t'F have been proposed or provided.

In addition to the preset magnification, when you want to use the zoom mechanism to set a magnification that corresponds to the size of the original and copy paper, the above calculation is performed using the CPU of the copying machine for the convenience of the user. It is designed so that it can be executed.

[Problems to be Solved by the Invention] The copying magnification is set, for example, by moving a lens or the like of an optical system (an optical system for exposing the raw stone and forming an image on a photoreceptor or the like). Therefore, the copying magnification that can be set is subject to mechanical constraints such as the movable distance of the lens.

However, the calculation of the copying magnification in the above-mentioned copying machine is performed based on the given divisor and dividend data, and the result is displayed, similar to a normal calculator. That is, even if the calculation result is outside the range that can be set as the copying magnification, the numerical value of the calculation result is displayed as is.

Therefore, even when a numerical value outside the settable range is displayed, the user is likely to misunderstand that copying will be performed at the magnification of the numerical value.

The present invention is intended to solve these problems.

[Means and effects for solving the problem] The present invention provides: a numerical input means capable of inputting a divisor and a dividend; a storage means for storing the input divisor and dividend; and a division method using the divisor and dividend. an instruction input means for instructing; an arithmetic means for executing v1 arithmetic in response to the division instruction;
a correction means for correcting the numerical value of the resultant p result to the upper limit numerical value when it is larger than the upper limit numerical value, and to the lower limit numerical value when it is smaller than the lower limit numerical value; and a display means for displaying the corrected numerical value as a copying magnification. This is a copying machine equipped with the following.

As a numerical input means, for example, a numeric keypad, which is conventionally provided for inputting the number of copies, copy magnification, etc.
It can be used as is. Note that by specifying the original size and copy paper size, a configuration may be adopted in which the divisor and dividend data are automatically input.

The storage means, calculation means, and correction means can also be configured in software using, for example, the control CPtJ of the copying machine, RAM, and the like.

The command input means may be a dedicated key for specifying the execution of an operation, or may be a zoom specifying key after inputting the divisor and dividend data. Alternatively, the process may be executed on the condition that the divisor and dividend data are input.

As the display means, a display unit conventionally used to display the number of copies, copy magnification, etc. can be used.

In the copying machine of the present invention, the copying magnification is calculated from the divisor and dividend data, and if the calculated magnification is within a settable predetermined magnification range, it is left unchanged, and if it is not within the range, it is corrected. , are displayed respectively.

Therefore, the user can know the copy magnification that is actually set.

[Example] The present invention will be described below with reference to illustrative embodiments.

(Configuration explanation) First, the configuration of the device will be explained.

FIG. 1 is an explanatory diagram of the configuration of a copying machine according to this embodiment.

A photoreceptor drum 1 that can be rotated counterclockwise is arranged approximately in the center of the copying machine body, and around it are a main eraser lamp 2, a sub-charging charge 1-3, a sub-eraser lamp 4, and a main charger. A charger 5, a developing device 6, a transfer charge 177, a copy paper separation charger 8, and a blade type cleaning device 9 are provided. Here, the photoreceptor drum 1 has a photoreceptor layer provided on its surface, and the photoreceptor is sensitized and charged by passing through the eraser lamps 2 and 4 and the charger 3.5, and the optical system 1
The image Im is exposed from 0.

The optical system 1o is installed below the original glass 16 so that the original image can be scanned, and includes a light source (not shown) and a movable mirror 11.
, 12, 13, a lens 14, and a mirror 15. The light source/movable mirror 11 moves to the left at a speed of (v/m) (where m: copying magnification) with respect to the peripheral speed (V) of the photosensitive drum 7 (constant regardless of the same magnification or variable magnification). The movable mirror 12.13 is driven by the Dc momo-M3 so as to move to the left at a speed of (v/2 m). Note that when changing the copying magnification, the lens 14 moves on the optical axis and the mirror 15 moves and swings.

On the other hand, there are paper feed slots 21 and 21 on the left side of the copying machine body.
, 23 is installed, and the copy paper conveyance path is provided with roller pairs 24, 25 . Timing roller pair 26
, a conveyor belt 27, a fixing device 28, and a pair of discharge rollers 29.

In the copying machine body, 120 to 123 are paper code (size) detection switches for the A paper feed section, and 124 to 1 are paper code (size) detection switches for the A paper feed section.
27 is a vapor code detection switch for the B paper feed section.

Further, in the paper feed tray 250, 251 to 254 are paper code detection switches for the C paper feed section, and 255 to 25 are paper code detection switches for the C paper feed section.
8 is a vapor code detection switch for the D paper feed section.

In FIG. 1, 300 is an automatic paper selection switch and display in an auto document feeder (hereinafter referred to as ADF) 302, and 301 is the same <
This is an automatic magnification select switch and display in the ADF 302. The ADF 302 is installed on the document table 16 of the copying machine, inserts the document face down from the tray portion 304, conveys the document to a predetermined position on the document table 16, and stops.

After the copying operation is completed, the original is turned over and discharged onto the tray 303. Therefore, the copying machine and the ADF are associated with each other so that the copying machine does not start up while the original is being conveyed, or at least so that the original is not being conveyed while the copying machine is scanning.

The paper feed tray 250 also serves as a stand for the copying machine, and has paper feed mechanisms 260 and 261 therein. The paper feed roller 26
0a and 261a are selectively driven. In this case, the paper feed start signal must be output at a faster timing than to the paper feed roller on the copying machine main body side.

FIG. 2 is an explanatory diagram of the operation panel section of the copying machine.

The operation panel 70 includes a print key 71 for starting the copying operation, and a numerical display device 72 capable of displaying 4-digit numerical values, 1, 2, . ..., 80 to 8 numeric keys corresponding to the numerical values 9°0, interrupt key 90 for specifying υ1-included copying, clear/stop key 91, paper for specifying the copy paper installed in multiple stages by size. A selection key 92, up and down keys 93 and 94 for changing and specifying the copy image density in steps, and a group of keys 95 to 103 related to a magnification setting device are arranged.

The first magnification setting key group 95, 96, 97, 98 is arranged for the purpose of arbitrarily setting the magnification.
When the key 99 for switching the magnification setting mode (arbitrary magnification setting mode) is operated and the control mode of the copying machine is switched to the first magnification setting mode, press any key (
When any one of the keys 95 to 98 is operated, the numerical value inputted by the numeric keypad and displayed on the display device 72 is stored as a copy magnification in the memory area corresponding to the operated key. Note that 99a is an indicator light that indicates that the arbitrary magnification setting mode is set.

Second magnification setting key group 100, 101, 102° 103
, a predetermined copying magnification is set in advance in its corresponding memory area, and you do not have to set the numerical value as in the case of the first group of keys (but the copying operation is executed based on the preset numerical value). Therefore, the preset copying magnification is, for example, a magnification that is considered to be commonly used for each destination at the time of shipment from the factory.This will be explained in detail later.

In this way, the first group of keys allows the user to arbitrarily set the required copying magnification, and the second group of keys includes A4→B5. B4→
A4. A3→A4. Alternatively, commonly used magnifications such as A4-4A3 are preset.

However, since the preset value for the second key group is a calculated copy magnification, the actual copy obtained may differ slightly from the copy magnification due to mechanical or design errors. There is. For example, even if you select the same size (x1), the actual copy will be (Xl, 004)
, or (Xo, 996> times).

The key 104 is provided to deal with this.

That is, by operating the second magnification setting mode switching key 104 (located inside the main body of the copying machine) shown in FIG. 1, the control mode of the copying machine is switched to the second magnification setting mode. By performing operations similar to those in the first magnification setting mode described above, it is possible to set arbitrary numerical values in the memory areas corresponding to the keys 100 to 103 to obtain a desired copy magnification. Specifically, for example, it is possible to correct the error by setting a numerical value of 1.002 or 0.998 for the same size key.

110 is a calculation mode key. The calculation mode key 11
By pressing 0, the calculation mode for calculating the copy magnification is set. After setting the mode, the size of copy paper, which is the dividend, is input using the numeric keypad. In addition, 1
10a is an indicator light indicating that calculation mode is in progress;
By pressing the calculation mode key 110, it lights up.

111 is a division key. As mentioned above, numeric keypad 80
When the division key 11 is pressed after inputting the size of the copy paper using keys 89 to 89, the input numerical value is stored in a predetermined memory area as dividend data. The division key 1
After pressing 11, enter the size of the divisor S using the numeric keys.

112 is an equal key. By pressing the equal key 112, division is executed to divide the dividend by the divisor.
The result is displayed on the numerical display M72. In addition, if the calculation result is not within the predetermined range (0,647 to 1.414>), 0°647 (if calculation result < 0.647) or 1.414 (calculation result > 1.414) ), the upper and lower limits are corrected and displayed.

Then, any one of the magnification setting keys 95 to 98 is pressed to 11.
11, the calculation result (the calculation result subjected to the upper and lower limit correction as necessary) is stored in the memory area corresponding to the pressed key.

FIG. 3 is a circuit diagram of the handle of the copying machine according to this embodiment.

202 is a second CPU that controls the optical system, and is connected to the first CPU 201 that controls the main operations of the copying machine via an interrupt terminal INT and data input/output terminals Sin and 5out. Further, 203 is a battery-backed RAM, 204 is a switch matrix, 205 is a drive circuit for a DC motor M3 for document scanning, 206 is a drive circuit for a stepping motor M4 for setting magnification, and 207 is a decoder. Note that output terminals △1 to A7 are transistors (inactive) for driving and switching the main motor M1, developing motor M2, timing roller clutch CL1, upper paper feed clutch CL2, lower paper feed clutch CL3, electrostatic charger 5, and transfer charger 7, respectively. (as shown).

The RAM 203 stores various data for copying operation control, or is shifted from the ROM in the CPU, and memory areas 01 to Q4 are set corresponding to selection keys 100 to 103. As will be described in detail later, for example, when the selection key 100 is turned on, the numerical value displayed on the display @72 is written to or read out from the memory area Q1 as the copy magnification, and when the selection key 101 is turned on, the value displayed on the display @72 is written or read out. It is written into or read out from the memory area Q2.

In addition, for selection keys 95 to 98, memory area Q
5 to Q8 are set in the same manner as described above. For example, when the selection key 95 is turned on, the magnification is set in the memory area Q.
5 is written or read from.

(Illustrated explanation) The operation of the above embodiment device will be explained below.

FIGS. 4 to 12 are flowcharts showing processing procedures for magnification setting and copying operation control executed by the first CPU 201. FIG.

FIG. 4 is a flowchart schematically and comprehensively showing the processing procedure in the first CPU 201.

The first CPIJ 201 and the second CPtJ 202 communicate with each other using interrupts. That is, information such as a scan command for the optical system, scan size, copy magnification, timing signal, return signal, and fixed position signal is communicated.

Step S1. In S2, upper memory areas Q1 to Q4 are stored when assembling the copier or shipping from the factory.
The copy magnification presetting process is executed. Details of this process are shown in FIG.

In step S4, on the condition that the copying machine is not in a copying operation, keys 95 to 98 or 1°O to 103 are pressed.
Processing is executed to associate the memory areas 05 to Q8 or 01 to Q4 with each other and set the copy magnification. Details of this process are shown in FIGS. 6 to 8.

In step S5, the magnification data set in S4 is read and transferred to the second CPU 202 on the condition that the copying machine is not in a copying operation as in S4. When transferring this data, the 20th P1. In J202, this is processed by an interrupt. Details of step S5 are shown in FIGS. 9 and 10.

At step $6, similarly to S4 and S5 above, the process of calculating the copying magnification in the calculation mode is executed on the condition that the copying machine is not in a copying operation. Details of this process are shown in FIG.

In step S7, processing for controlling the copying operation is executed. Details of this process are shown in FIG. In addition, the first
Figure 3 is a time chart showing the operation.

FIG. 5 shows memory areas 01 to 103 set in the RAM 203 corresponding to the second magnification setting key group 100 to 103.
12 is a flowchart showing details of initial setting processing for presetting predetermined magnification data in Q4.

Here, the initial switch in step S1 in FIG. 4 is a switch that is placed in a position in the copying machine that cannot normally be operated, and can only be operated, for example, during assembly in a factory or by a service person. When the switch is operated, the process shown in FIG. 5 is executed.

The numerical values preset in memory areas 01 to Q4 are determined by a combination of operations on keys (disposed inside the copying machine body) shown at 105 and 106 in FIG. Specifically, at the time of machine assembly or factory shipping, a worker operates switches 105 and 106 according to a predetermined combination determined by the destination, etc., and closes the initial switch, thereby opening the memory area. 01～
Magnification data is written to Q4.

FIGS. 6 to 8 show selection keys 100 to 103 and 95.
98 is a flowchart illustrating a process of correcting and setting numerical values as copy magnifications as necessary in memory areas Q1 to Q4 and Q5 to Q8 corresponding to 98, respectively, and transferring the values to the 20th PU 202.

In FIG. 6, when the copy magnification setting mode is first entered by key 99 or key 104, magnification setting is requested for either the first group of keys 100 to 103 or the second group of keys 95 to 98. It is determined whether the
101.5101a). That is, when nine keys are operated, it is the first copy magnification setting mode, and flag A is set to 1''.
is set (S102>.On the other hand, if keygo 04 is operated, flag B indicating the second copy magnification setting mode is set.
II 1 II is set in (S102a).

Next, after setting the 1000th flag (described later) to 1°' (3103), turn on the indicator light 99a indicating the copy magnification setting mode (common to the first and second modes) (5104), and the calculation flag (described later). If the calculation flag is "1°", that is, if it is in calculation mode, jump to 5220 (Fig. 7). 5105), 82
20 or less processes are executed, and the calculation results (calculation results after upper and lower limit correction) are stored in the memory area corresponding to the operated key.

Next, on the condition that it is the magnification setting mode (810
6,5106a), the process of setting the display of the first place to 0°' is executed (8107). That is, when υI'jll of the copying machine is switched to the copy magnification setting mode, the numerical display device 7
2 will be displayed as 'bbbo' (b is blank) and 100
It enters a standby state in which numerical input is accepted sequentially starting from the 0th digit.

In addition, each flag shown in 5108.5115.5119.5123 is the 1000th digit, the 100th digit, and the 10th digit, respectively.
This is a flag that determines the input standby state for the digit and first digit.

When any of the numeric keys 80 to 89 is operated while waiting for input to the 1000th digit, the type of key is first determined in step 5109.

When the operated key is the "1" key 80, the process advances to 5110 and "1" is displayed in the thousandth digit.

Thereafter, the 1000th place flag is lowered, the 100th place flag is raised (8111), and an input standby state for the 100th place digit is set. That is, when the "1" key 80 is operated for the first time, it is assumed that "1" has been input as the numerical value to the 1000th digit. In addition, here is a numerical display device! 72, expressions such as 1000th place, 100th place, 10th place, and 1st place are used for convenience, but the numerical value as a magnification is treated as a decimal number with 3 digits after the decimal point and 4 digits as significant figures.

Before&! In 5109, if the input numerical value is rOJ or "2 to 9", the process advances to 5112 and displays 0" in the 1000th digit. In other words, "0" is displayed in the 1000th digit.
0" is assumed to have been input. As mentioned above, the copy magnification that can be set is 0.647 to 1.
414, the 1000th digit is always “O”.
This is because it will be either II or "1".

In S113, the input numerical value is "0" or "2".
-9", and if it is "0", set it as 5.
Proceed to 111.

On the other hand, if 5113 determines "2 to 9", 10
After lowering the 00th place flag (S114), the process advances to 5117 and the input numerical value is displayed in the 100th place digit. That is, if any one of "2 to 9" is input first, that numerical value is treated as input to the 100th digit. This results in 1
The key operation for inputting 110 N into the 000th digit can be omitted.

8115 to $126 are steps that indicate the process of sequentially displaying the input numerical value in the digits corresponding to the flag (100th to 1st digits), and are basically the same as inputting to the 1000th digit. , the explanation is omitted.

FIG. 7 is a flowchart showing the process of storing the input and displayed numerical value in the memory area corresponding to the next operated selection key.

First, it is determined whether the mode is the first magnification setting mode or the second magnification setting mode (8201).

5201, either flag A or flag B is “1”
Since this is a step that is executed only when
It is sufficient to judge only.

When flag A is 1'', first selection key group 95-9
The process advances to steps 522o and subsequent steps to determine the operation of step 8.

On the other hand, when flag 8 is not 1", that is, flag B is 1"
In this case, the process advances to step 3202 and subsequent steps in which the operation of the second selection key group 100 to 103 is determined.

First, the processes 5202 to 5205 will be explained. This is the process when the key 100 is operated. That is, first, necessary upper and lower limit corrections are performed by the subroutine 5203 (details will be described later), and then the display is performed! ! Write 1m to memory area Q1 as magnification data (S204
>, lower flag B to cancel magnification setting mode52
05), the display 99a is turned off (S207).

S211~S213, S214~S216, S217~
S219.8220~$222.8227~5229.
5230-5232 and 8233-$235 are $-
101, 102, 103, 95, 96, 97, and 98
, memory areas Q2, Q3, Q4, Q5, Q6, Q7
．． This is a step of performing the same processing as above by associating Q8 and Q8 with each other. Note that the first selection key group 9
After processing steps 5 to 98, lower the calculation flag.
224), and the display is turned off-1 (S226).

This is because steps 8220 and subsequent steps are executed even under the calculation mode described later.

In this way, after storing the corrected and displayed numerical data as magnification data in the memory area corresponding to the operated key, the data is transferred to the second CPU 202 (S206.5223), 20th PtJ202
This causes the magnification setting mechanism to be driven and controlled.

In addition, if the clear/stop key 91 is operated (
8208>, display "1" indicating the number of copies in the first digit 5209), cancel the magnification setting mode (S210)
.

FIG. 8 is a flowchart showing details of 8203 in FIG.

That is, in the process shown in Figure 7, the displayed value is 0.
．． If smaller than 647 (8240), display 0.64
7. ! = (S241>) On the other hand, if the displayed numerical value is larger than 1.414 (S242), the display is changed to 1.
414 (S243). Upper and lower limit correction is performed in this way.

9 and 10 show the second selection key group 100 to 10.
3 and the processes executed when the first selection key group 95 to 98 are operated, respectively.

In FIG. 9, keys 100, 101, 102 and 10
3 is operated, the light emitting diodes 100a, 101 provided corresponding to each key are activated.
A, 102a, and 103a (see Figure 2) that correspond to the operated key are lit, and then the numerical data stored in the corresponding memory area is transferred to the second
This is data to be transferred to the CPU 202. This allows the second
The CPU 202 drives and controls the magnification setting mechanism.

Similarly, in FIG. 10, when any of the selection keys 95 to 98 is operated, the corresponding light emitting diode is turned on, and since the magnification is set to an arbitrary value, it is set in the corresponding memory area 05 to Q8. The numerical value that is the magnification data is displayed on the display device 721C (S402
．． 3408.5415.8420). This display is set, for example, only when each key is pressed, and when the key is released, the number of copies set in another storage device is called up and displayed on the display bag W172. There is. Further, the numerical values stored in the memory areas 05 to Q8 are set as data to be transferred to the second CPU 202 (8
405, S411.5418.3423), 20th Pt.
J202 drives the magnification setting mechanism based on the transferred data.

Figure 11 shows the calculation of copy magnification! l! l! It is a flowchart showing the process.

First, by pressing the key 110 (8501), the calculation mode is set or canceled.

That is, if the calculation flag before that is '0',
Set the calculation mode and turn on the indicator light 110a (85
03) and set the dividend flag to ``1'' (S50
4) Set the copy paper size input standby state.

On the other hand, if the calculation flag before that is °1'',
The indicator light 110a is turned off (5505), the magnification setting mode display 99a is turned off (8506), and the calculation flag is lowered (S507) to cancel the calculation mode. The processing in steps 8505 to 5507 is a process for canceling the calculation mode when the calculation has been executed but the calculation result is not stored in the magnification key and the user wants to finish the calculation alone.

Next, by turning the division key 111 on edge (8508), the dividend flag is set to O°' (S509), and the divisor flag is set to 1'' (8510), setting the divisor, that is, the size of the original, to an input standby state. do.

Next, by pressing the equal key 112 (S511), the divisor flag is lowered (8512), the magnification setting mode display 99a is turned on (3513), and the division is executed (5513).
514), executes the subroutine process shown in FIG. 8 on the calculation result (S515), performs the upper and lower limit correction, and then sets the calculation flag to 1 (8516). As a result, the process advances from S105 (FIG. 6) to step 8220 (FIG. 7), and the magnification can be set in the same manner as in the arbitrary magnification setting mode.

Next, on the condition that the dividend flag is "1'°" (S517), input information using the numeric keys 80 to 89 is
Store in the memory area of the dividend (8518.5519
).

Also, on the condition that the divisor flag is 1'° (S
520), the input information from the numeric keys 80 to 89 is stored in the divisor memory area (S521.5522).

Also, on edge of clear stop key 91, (
S523), if the dividend flag is II 111, clear the memory information of the dividend memory area 5525)
Also, if the divisor flag is 1'', the storage information in the divisor memory area is cleared (S527).

In the manner described above, the calculation and setting of the copy magnification, the display of the calculation results, and the transfer to the second CPU are performed. Note that the second CPU executes drive control of the magnification setting mechanism based on the transferred data.

As is clear from the above, according to the apparatus of this embodiment, any copying magnification can be easily set using the first magnification setting mode. Furthermore, according to the second magnification setting mode, it is possible to modify the preset copy magnification.

Further, when the copy magnification is calculated from the copy paper size and the original size, the calculation result is displayed without requiring any special operation. Moreover, the calculation result is
If the copy magnification is not within the predetermined settable range, the necessary upper and lower limit corrections are performed and the above-mentioned display is performed.

FIG. 12 is a flowchart showing an example of controlling the copying operation of the copying machine. This will be briefly explained with reference to the time chart of FIG.

In block 10, by turning on the print switch, the main motor M1, the developing motor M2, the electrostatic charger 12, and the transfer charger 14 are activated (), and the copy flag indicating that the copying operation is in progress is set to "1". '', start timers TA and TB for 1till all, and turn on the clutch of the paper feed roller on the selected side.

In block 11, the end of timer TA is determined and the paper feed clutch is turned off.In block 12, the end of timer TB is determined,
The scan motor M3 is turned on to start the scan operation.

In block 13, when the timing signal is output during the scan operation, the timing roller clutch CL
3 is turned on, and a process of setting timer TC is executed. The copy sheet is conveyed by the timing roller 35 in synchronization with the image on the photoreceptor drum 10.

In block 14, it is determined that the timer TC has ended, and the charging, scan motor, and timing roller clutch are turned off. Note that the timer TC may be set variably depending on the size of the copy sheet used.

In block 15, when the optical system returns to the home position due to the return operation and the home position switch is turned on, the developing motor M2. Each transfer charger 14 is turned off, the copy flag is set to "°0", and the timer T-
Processing to set D is executed.

In block 16, it is determined that the timer TD has ended, and the main motor M1 is turned off. Block 17 performs processing for each invasion force.

Note that the timers T-A to T-D explained in the above flowcharts and time charts are programmed so that they are counted up to "1" for each routine of processing executed within the time specified by the internal timer. It is a digital timer with time-up time stored as numerical data.

In this embodiment, the calculation mode key 1101, the division key 111, and the equal key 112 used when calculating the copy magnification are provided on the operation panel as dedicated keys. You can also share existing keys by doing this.

[Effects] As explained above, in the present invention, the copy magnification can be set by a simple operation, so it is possible to copy at any time and at any magnification, and the copy magnification is calculated on the copying machine. Moreover, the calculated magnification is displayed with necessary upper and lower limit corrections without requiring any special key operations, so the user can know the copying magnification that will actually be executed.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a copying machine according to an embodiment of the present invention, and FIG.
The figure is a plan view showing the operation panel of the copying machine, and FIG. 3 is an electric circuit diagram of the copying machine. , Figures 4 to 12 are the first
These are flowcharts showing processing procedures executed in the CPU, with FIG. 4 showing a schematic flowchart, FIG. 5 showing the fourth cause S2, FIGS. 6 to 8 showing the fourth cause S4, and FIGS. Figure 10 shows the fourth factor S5, Figure 11 shows Figure 4 86,
FIG. 12 is a flowchart showing the process 87 in FIG. 4, respectively. FIG. 13 is a timing chart of the process shown in FIG. 12. 72...Numeric display device 80-89...Numeric keypad 95-98.100-103...Magnification setting key 110
...Calculation mode key 111...Division key 112...Equal key-201...1st CPU Q1-Q8...Memory area

Claims (1)

[Claims] (1) Numerical input means capable of inputting a divisor and dividend; storage means for storing the input divisor and dividend; command input means for commanding division by the divisor and dividend; a calculation means for executing division according to the calculation result, and comparing the calculation result with a predetermined upper and lower limit numerical value;
a correction means for correcting the numerical value of the calculation result to the upper limit numerical value when it is larger than the upper limit numerical value, and to the lower limit numerical value when it is smaller than the lower limit numerical value, and a display means for displaying the corrected numerical value as a copy magnification; A copying machine equipped with