JPS6033576A - Copying machine - Google Patents

Abstract

PURPOSE:To prevent set magnification from being erased or varied carelessly by inhibiting the set magnification data from being varied when necessary. CONSTITUTION:When the protection key 107 of a console panel 70 is operated, a protection flag is inverted to a high level to turn on a protection display 109, and an incroporated CPU performs process control corresponding to the protection flag. Even if a magnification slection key 98 and keys 80-89 on a ten-key pad are operated in said state, the set magnification which is already selected and stored in a memory is protected. This protection is released with a protection release key 108. This constitution prevent the set magnification from being erased or varied carelessly.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a copying machine capable of performing a copying operation by inputting a predetermined numerical value and using that numerical value as a copying magnification.

2. Description of the Related Art Copying machines have been proposed or provided that allow a predetermined number of digits to be input using a numerical input device such as a numeric keypad, and copies can be made at a copying magnification based on the input value. This type of copying machine allows the user to make copies by inputting the desired copying magnification, and what is more, the user only has to store that magnification data and then specify the memorized magnification data next time. Since it is possible to make copies at that magnification, it is extremely useful in practice.

However, since the copy magnification can be set freely, the stored copy magnification may be erased or changed regardless of the intention of the person who set it, which has been a problem.

Purpose The present invention has been made in view of this point, and in addition to the above-mentioned arbitrary magnification setting frame 1, it is possible to perform an operation to prohibit changing the set magnification data as necessary, and to make it possible to prohibit changes to the set magnification data. The object of the present invention is to provide a copying machine in which setting data is prevented from being deleted or changed.

Example An embodiment of the present invention will be described below with reference to the drawings.

[Copying mechanism]

FIG. 1 shows an example of an electrophotographic copying machine equipped with a magnification setting device. A photoreceptor drum (1) that can be rotated counterclockwise is installed approximately in the center of the copying machine, and around it are a main eraser lamp (2) and a sub charger (2).
3), sub eraser lamp (4), main charger (5), developing device (6), transfer charger (7), copy paper separation charger (8), blade type cleaning 1; It is arranged. Photoreceptor drum (
1) is provided with a photoreceptor layer on its surface, and this photoreceptor is sensitized and charged by passing through the eraser lamps (2), (41) and the charger (31, (5), and is connected to the optical system (10). ) receives image exposure.

The optical system (10) is installed below the original glass (16) so that the original image can be scanned, and includes a light source (not shown), movable mirrors (11), (12), (13), and a lens (1
4) and a mirror (15). The light source.

The movable mirror (11) adjusts the circumferential velocity (V) of the photoreceptor drum (1).
) (constant regardless of magnification or variable magnification), (■/n) (
The movable mirror (+2) is driven by a DC motor (MS) so that the IJ moves to the left at a speed of (V/2n). be done.

Note that when changing the copy magnification, the lens (14)
The mirror (15) moves and swings along with the movement on the optical axis, and such a magnification changing device will be described in detail later.

On the other hand, there are paper feed rollers (2
Paper feed section (20), (22) equipped with 1), (23)
is installed, and the conveyance path of the copy paper is a pair of rollers (24), (
25), timing roller pair (26), conveyor bell l-(
27), a fixing device (28), and a pair of discharge rollers (29).

Next, a mechanism for moving lenses, mirrors, etc. for magnification change 1 will be explained with reference to FIGS. 3 and 4. This magnification change mechanism allows virtually stepless magnification to be selected from enlargement to reduction.Specifically, the magnification (Xl, 414)
It is possible to appropriately select a magnification from 1 to 1 to reduced (Xo, 647).

The magnification changing mechanism basically consists of a lens moving mechanism (35), a mirror moving mechanism (40), a mirror swinging mechanism (55), and a stepping motor (M4) that drives these.
1 has been done.

7 move m 4'll'+(:+5) +;, t,
1) The i+ mark L/7 (14) is movably mounted on the guide rail (36) installed parallel to the optical axis, and 1) 1st eye 1. Skipping motor (M
Fixed to the output shaft (31) of 4)! l;ll moving pulley (
The drive wire (37) wound around the lens (32) is stretched around a rotatable boo IJ (38), and the middle part of the drive wire (37) is attached to the side of the lens (14). be. Therefore, by rotating the stepping motor (lil) forward and backward at a predetermined number of rotations, the driving pulley (32
), the drive wire (37) rotates forward and backward, and the lens (
14) moves in the left-right direction in FIG. 3 on the optical axis along the 5-guide rail (36) and is stopped at a position corresponding to the magnification.

The mirror moving mechanism (40) fixes the mirror (15) on the back side to a shaft (43) rotatably supported on the moving body (41), and the side piece (42) of this moving body (old) is slidably attached to a guide shaft (45) installed parallel to the optical axis, and a rotatable narrow roller (44) provided at the end of the shaft (43).
This is an auxiliary guide rail (46). In addition, the peripheral surface of the movable drive cam (53) comes into contact with the pin (5o) provided on the movable body (old) via the bracket (49), and the movable body (old) stops one end on the pin (47). It is biased toward the cam (53) by the attached coil spring (48). The output shaft (31) of the stepping motor (M4)
) is engaged with the gear (52) fixed to the cam (53).
is fixed to the other end of the support shaft (51).

Therefore, the rotation of the stepping motor (M4) is transmitted from the gear (33) to the cam (53) via the gear (52) and the support shaft (51).
) moves back and forth on the optical axis according to the circumferential shape of the cam (53) to correct the optical path length as the magnification changes.

That is, the lens (+-1) and mirror (15) are driven in conjunction with each other by a stepping motor (M4) as the magnification is changed, and their positional relationship is as shown in FIG. In addition, in the embodiment of the present invention, the rotation amount of the stepping motor (M4) is continuously adjusted in order to perform stepless magnification, but if this is done in stages, several types of magnification can be selected. It can be a mechanism to

On the other hand, mirror Gl? The moving mechanism (55) is configured to move the moving body (4
The peripheral surface of the swing drive cam (57) fixed to the rotatable support shaft (56) provided in 1) is brought into contact with the back surface of the mirror (15), and the mirror (15) is wound around the shaft (43). The turned coil spring (58) urges the cam (57), while the pinion gear (59) fixed to the spindle (56) meshes with the rack (60) attached to the main body of the copying machine. rack(
60) extends parallel to the guide shaft (45) F)if. This mirror swinging mechanism (55) cannot be used simply by moving the mirror (15) to 111 when changing the magnification. The mirror (15
). In other words, the moving object (41
) moves back and forth, rolling on the pinion gear (59) or rack (60), the cam (57) rotates together with the support shaft (56), and the mirror (15) follows the shape of the circumferential surface of the cam (57). Accordingly, the exposure point is corrected by swinging about the shaft (43) as a fulcrum.

In this case, the rocking angle of the mirror (15) is determined so that the optical axis of the light beam reflected by the mirror (15) is directed toward the center of the photoreceptor drum (1) at maximum magnification (in this example, during magnification). For smaller magnifications, light also appears prominently at the same exposure point as the maximum magnification. By making the optical axis at maximum magnification incident perpendicularly to the photoreceptor drum ( Distortion in the exposed image due to deviations in the angle of incidence is made less noticeable.

〔Control device〕

FIG. 5 shows the arrangement of operation keys on the operation panel of the copying machine. The operation panel (70) includes a print key (7) for starting the copying operation, and a numerical display device (72) capable of displaying four digit numbers.

1 and 2 respectively. ..., Numeric keys (80) to (89) corresponding to the numerical value of 9.0, Interrupt key (90) for specifying and canceling interrupt exposure, Clear Su!・Tsubuki (9
1), Paper selection key (92) for specifying the copy paper loaded in multiple stages by size, Up and Down keys (93), (94,) for changing and specifying the copy image density step by step. , a group of keys (95) to (103) related to the alj magnification setting device, a protect key (+(17) for prohibiting changes to the set netI magnification
), a release key (108) to release the protection function.
and a light emitting diode (+09) that displays the protection status.
) etc. are placed.

First magnification setting key IY, (!15), (96),
(97) and (98) are 1-1 where the magnification is set arbitrarily.
When the first magnification setting mode switching key (99) is operated and the control mode of the copying machine is switched to the first magnification setting mode,
When any 9 - key 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 corresponding to the operated key.

Second magnification setting key group (100), (101), (1
02) and (103) have predetermined copy magnifications set in their corresponding memories, and
You don't have to set numerical values like in the case of memory 1 key group.
It is considered that copying operations can be performed based on preset values. Therefore, the preset copying magnification is, for example, a magnification that is considered to be commonly used for the first lees at the factory shipping stage. This will be explained in detail later.

In this way, the first set of keys allows the user to arbitrarily set the required copying magnification, and the second set of keys is generally used. For example, if it is a domestic specification, A4 → B5. B4→A4. A
3→A4. Alternatively, it is given a role with a functional upper limit such that the magnification corresponding to A4→A3, etc. is preset. However, the preset value for the second key group is 11] 〇- Since it is a general or dl calculation copying magnification, the actual copy obtained due to mechanical error or design error. or the copy magnification may be slightly different. For example, even if you select the same size (×1), it is actually (×1004).
Alternatively, it may be (Xo, 996) times. In such a case, the control mode of the copying machine is switched to the second magnification setting mode by operating the second magnification setting mode switching key (104) shown in FIG.
It is possible to obtain a desired copying magnification by setting arbitrary numerical values in the memory corresponding to each key (100) to (103) using the same operation as in the magnification setting mode of memory 1. Specifically, the numerical value 1002 or 0998 may be set for the same size key.

FIG. 6 shows a control circuit used in the magnification setting device of the present invention, where (20+) is the 1st CPU, (202) is the 2nd CPU, and (2 (13) is the electric lIi! backed up RA M, (204) is a switch matrix, (205) is a drive circuit for a DC motor (M3) for document scanning, (206) is a stepping motor (M4) for zooming.
) drive circuit.

(207) is a decoder. Note that the output terminals σ) and σ) are connected to the main motor (Ml, ) and the developing motor (
M3), timing roller clutch (CLl), top paper feed clutch (CL2), paper non-feed clutch (CL3), charger (5), and transfer charger (7) each connected to the drive switching transistor (Fig. 7). be done.

RAM (203) has various data for copying operation control written therein, or is shifted from the ROM in CI)-U and stored therein.
00) to 103), a storage unit (Ql).

It has (Q2), (Q3), (Q, 4),
As will be described in detail later, for example, when the selection key (100) is turned on, the magnification displayed on the display device (72) is written to or read out from the storage section (Ql), and when the selection key (101) is turned on, the magnification displayed on the display device (72) is written to or read out. Then, the magnification is written into or read out from the storage section (Q2).

Also, for the selection key (95) or 98), the storage section (
Qs), (Q6), (Q, 7), (Qs) are provided in the same way as a double series, and for example, when the selection key (95) is turned on, the magnification is written in the storage section (Qs) or (Qs).

8 to 15 show the first c p u (201)
3 is a flowchart showing a processing procedure for setting magnification and controlling a copying operation, which is executed in FIG. The present invention will be specifically explained below based on this.

FIG. 8 is a flowchart schematically and comprehensively showing the processing procedure in the first CI) U (201).

In step (Sl), (82), presetting processing of magnifications for the two storage units (Ql) to (Q,i) is executed, which is mainly done during machine assembly or at the stage of shipping the machine. (Details of the second process are shown in FIG. 9.

In steps (S3) and (S4), select keys (95) to (98) or (
Processing is executed to associate and set magnifications A to (1) to (100) to (103). For details on this process, see Chapter 10.
It is shown in Figure 12. Interrupt copying will be described later.

In step (S5), data for controlling the lens position and motor driving speed is sent to the second CPU (202) in accordance with the magnification set in step (S4).
). When transferring this data, the second CPU (202) processes this by interrupting the program routine. Step (S5)
The details are shown in FIG.

In step (S6), processing for controlling the copying operation is executed. Details of this process are shown in FIG. In addition,
FIG. 16 is a time chart showing the operation.

FIG. 9 is a flowchart showing details of the initial setting process for presetting predetermined numerical values in the memos IJ(Ql) to (Q4). The initial switch in step (Sl) in FIG.
This is a switch set in a position in the copying machine that cannot normally be operated, and the process shown in FIG. 9 is executed only when this switch is operated.

The numerical values preset in memory (Ql) to (Q4) are:
It is determined by the on/off state of the switch associated with the switch operation 14- shown as (105) and (106) in FIG. At the stage of cargo loading, etc., the worker switches the destination according to the combination determined in advance by the destination, etc. (105);
By turning on and off the switch (106) and closing the initial switch 4, the numerical values of 31 are preset in the memories (Ql) to (Q4).

In this process, the magnification values for the combination of on and off of the switches (+05) and (106) stored in the first CPU (201) are stored in each memo 'J (Q, I) ~
(Q4), switch (+05),
Table 1 shows specific examples of preset values for combinations of on and off (106).

Table 1 Selection keys (95) to (98), (100) to (+03
), the processes shown in FIGS. 10 to 14 are executed to set a numerical value as a copy magnification in the notes IJ(Ql) to (Q8) corresponding to the notes IJ(Ql) to (Q8).

In FIG. 10, step (S101), (Sxo
In 2), when the key (99) or (104) is operated to switch to the copy magnification setting mode, the first. It is determined for which second key group magnification setting is requested. When the key (99) is operated, the mode is the first copy magnification setting mode, and flag A is set to II II+. When the key (104) is operated, flag B indicating the second copy magnification setting mode is set to 1''.

When the key (99) or (104) is operated, the 100 inverted flag is set to "1" in steps (Sl, 03) and (5105) in either case, and the display of the first place is changed to 10.
” processing is executed. That is, when the control of the copying machine is switched to the magnification setting mode, the numerical display device (72) displays "'bbb□" (+ is blank), and 100
It enters a standby state that accepts input from the 0th digit.

In this state, when the numeric keypad is made 4, Y, step (
5107), the key type is determined, and the "1" key (8
Only in case (1), proceed to step (SI08) and proceed to step 10.
Display “1” in the 00th position. Here, for convenience in relation to the numerical display device (72), we will explain the numerical values input in terms of 1000th place, 100th place, 10th place, and 1st place, but the numerical value as a magnification has a decimal point and -d: It is treated as a decimal number with 3 digits and 4 significant digits.

If the 1000th place flag is °'l' and the input numerical value is "0" or "2" ~ [-1) -1, proceed to step (Solo) and display "Oj" at the 100th place. Next, if the input is 10, go to step (S109) and set the 1000th flag to 0 as in the case of 1-1.

Set the digit flag to '1'' (7 and wait for input to the 100th digit,
If the input is "2" to "9", the 1000th flag is set to "'(1") in step (S112), and then step (
Sl, 15) and change the input number (ji'i to 10
Display in the 0th digit.

The processing described above when the 1000th flag is '1' is based on the premise that values in the range of 0647 to 1414 are treated as valid copy magnifications.
- Therefore, only "1" or "0" can be displayed in the thousands digit. Also, by doing this, 100
Key operations for inputting "0" into the zero digit are simplified. Incidentally, even if such processing is executed, there may be a case where the numerical value inputted below the 100th place becomes a numerical value outside the range of the above-mentioned effective copying magnification. The processing at this time will be explained in the subroutine section of FIGS. 11 and 12.

When a value is entered in the 1000th place digit, the 100th place flag becomes 1°'', and when the numeric keypad is operated in this state, it becomes 1°.
The numerical value corresponding to the key operated in the 00th digit is input,
In step (Sl 15), the numerical value is displayed, and in step (S116), the 100th place flag is set to '0'.
'' and the 10th place flag is set to ``1''. Hereinafter, the input of the 10th place and the 1st place are also performed by operating the numeric keypad.

Figure 11 (al, (b), (CI flowchart) shows the process of storing the numerical values input and displayed in the process of Figure 10 in the memory corresponding to the next operated selection key. It is.

In step 18 (5201), it is first determined whether the mode is the first magnification setting mode or the second magnification setting mode. Step (S201) is executed only when either flag A or B is 1'', so here, for example, only the determination of whether flag A is 1'' is executed; If it is 1'', it is the first magnification setting mode, so the step of determining the operation of the first selection key group (95) to (98) (S235) (FIG. 11 F+)
l) If the flag A is not "1", that is, if the flag B is "'1", the second magnification setting mode is entered, so the second selection key group (100) to (103) )
The process proceeds to the step (8202) and subsequent steps for determining the operation of the .

In the process shown in FIG. 11 (al, fl)l, in any magnification setting mode, the displayed numerical value is basically stored in the memory corresponding to the operated selection key. . However, as mentioned above, it may be inconvenient if the copy magnification that has been set and memorized is easily changed.
0) to (103) and (95) to (98) are turned on, each step (S20
6) to (5209) and steps (S2:39) to (S
242), and when the protect flag is “1” (prohibited 11-mode), the diode (109) is turned on to indicate that, and each key is cleared only when the protect flag is “0”. When the key is activated, a process is executed to set the numerical value displayed in the memory corresponding to the key in accordance with the flowchart shown in FIG. 10. The protect flag is set to 1111+ by operating the protect key (107) while operating each magnification selection key and storing the numerical value in the memory.

In steps (S206) to (S2i)9) or steps (S239) to (S242), the protect flag is set to “
0′”, the operated keys (100) to (103)
Alternatively, numerical values are set in the memories corresponding to the keys (95) to (98), but at this stage, numerical values that are outside the range allowed for the copy magnification may be displayed. Therefore, the 11th
In the process shown in Figures (al, (1)l), after determining the operation of each key, the subroutine shown in step (5214) is executed to prevent numerical values outside the permissible range from being stored in the memory. The process of step (5214) is shown in FIG.

In Fig. 12, if the display is not 10, then in step (5290) the displayed value is 06.
It is determined whether the value is smaller than 47, and if it is smaller, the display is set to 0.647 in step (5291). Also, in step (S292), the displayed number is 1414.
Determine whether it is greater than or not, and if it is greater than step (
In S293), the display is set to 1414.

Therefore, to explain in relation to FIG. 11, when a predetermined selection key is operated in the magnification setting mode, if the displayed value is outside the allowable range, the display is changed to the allowable limit value and then the display is changed to the allowable limit value. Stores the numeric value in the memory corresponding to that key. When the process of storing numerical values in the memory is executed, flag A is set to "0" in the first magnification setting mode, flag B is set to "0" in the second magnification setting mode, and the protect key (107) is pressed. After processing when the magnification selection 21- key is pressed, the process proceeds to step (8268,) in FIG. 11 fcl.

Steps (S268) to (5270) show the processing when the clear stop key (91) (see FIG. 5) is operated. When the clear/stop key (91) is pressed, "'bb+)l" is displayed on the display device (72) in steps (S269) and (S270), and flag A is displayed.

B is set to "0"'. In other words, the clear stop key (
91) is operated, the displayed numerical value is cleared and the magnification setting mode is canceled.

Therefore, the numerical value "1" thus displayed is "11" as the standard setting value for the number of copies.

The processing in steps (5271) to (5287) is performed by holding down the protection release key (108) and pressing the magnification selection key (1).
00) to (103) or (95) to (98) indicates that the protection of the magnification value for that key is canceled.

To summarize the processing related to magnification value protection,
When the magnification selection key is operated while the magnification value is displayed in the process shown in FIG. 10, the magnification value has already been set in the memory corresponding to that key, and the protect flag is set to 1''. If the prohibition mode is specified, the protect display (109) is turned on without setting the numerical value to the memory corresponding to the selected key.
()°', if you wish to prohibit changes to the numerical values set in the memory, press the protect key (107) while holding down the selection key. Further, if the selection key and the release key (108) are pressed simultaneously in the magnification set mode, the protected state (inhibited mode) is released.

13 and 14 respectively show the second selection key group (10
0) to (103) and the first selection key group (95) to (9
8) shows the process executed when operating.

In FIG. 13, keys (100), (101),
When any one of (1,02) and (103) is operated, the light emitting diodes (100a) (1o1a), (xo2a) and (1
03a) (see Figure 5) that corresponds to the operated key is lit, and then the 2nd CI' LJ (20
2) Transfer to step (5406) in FIG. 14.

In FIG. 14, when any of the selection keys (95) to (98) is operated, in this case, the corresponding light emitting diode is turned on as described above, and since the arbitrary magnification is set, step (5402) ).

In (5408), (8415) and (5420), the numerical values set in the corresponding memories (Q5) to (Q8) are displayed on the display device (72). 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 device (72). has been done.

As is clear from this explanation, according to this magnification setting device, for any copy magnification required by each user, a plurality of magnifications can be set using the first magnification setting mode using the selection keys (95) to (98). The magnification can be easily set, and when necessary, the magnification can be recalled by operating the selection key at any time, and the set magnification can be confirmed on the display, and the numerical value can be used as control data for the copying machine. Further, according to the second magnification setting mode, the numerical value -1-
The effect is achieved that the work of reading the error with the copying magnification and correcting the magnification can be performed extremely easily. In addition, in the copying machine of the present invention, changes to the magnification data in the magnification setting mode can be prohibited as necessary to protect the magnification data.

For the numerical value set in this way, the lens (14)
is controlled by the control device (206) based on the output of the second CPU (202) in accordance with the copying magnification, and the stepping motor (M4) is moved, for example, for the numerical value 00 (month or 0002). The drive is controlled in both forward and reverse directions so that the optical system rotates by one pitch.Accordingly, practically stepless variable magnification is achieved.The moving speed of the optical system also corresponds to the set value. It is controlled by a control device (205) based on the output of the second CPU (202) so as to be variable, but many methods have been proposed or proposed in the past regarding the speed control of the DC motor which is the drive source. 25-, and will not be described in detail here.

In FIG. 5, the panel portion (70a) adjacent to the selection keys (95) to (98) is a whiteboard that can be written on and erased using a designated writing instrument, a removable adhesive sticker, or a panel that can be attached and detached by magnetic force. It is convenient for use if the magnification of the numerical value set arbitrarily by the user is used, for example, to write characters such as "Paper → A44".The panel part (70a) can be used for other purposes as necessary. A concave or convex step may be provided with respect to the panel portion.In this case, the memories (Q5) to (Q8) may be distinguished and displayed using lamps.

[Copying operation]

FIG. 15 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. 16.

In block 10, when the print switch is turned on, the main motor (Ml) and the developing motor (M2) are activated.
, charging charger (12), transfer charger (]4
), set the copy flag indicating that the copy operation is in progress to "1", start the control timers (TA) and (T-B), and Turn on the clutch of the paper feed roller on the side.

In block 11, the end of this timer (TA) is determined and the paper feed clutch is turned off.

In block 12, it is determined that the timer (T-B) has expired, and 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 (C
A process of turning on L3) and setting a timer (TC) is executed. The copy sheet is conveyed by the timing roller (35) in synchronization with the image on the photoreceptor drum (10) l-.

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

-27-' 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,
Turn off the developing motor (M2) and transfer charger (14), set the copy flag to "OII", and
The process of setting and sorting the timer (T-r) is executed.

In block 16, it is determined that the timer (T-D) has expired, and the main motor (Ml) is turned off.

Block 17 performs processing for each extrusion force.

Note that the timers (T-A, ) to (T-D), etc. explained in the above flowcharts and time charts are MCs that are executed within the time specified by the internal timer.
This digital timer is programmed to count up to "1" in one routine of the process (50'), and the time-up time is stored as numerical data.

As explained above, the present invention has the advantage of being able to easily set the copy magnification, and also prohibits numerical value setting operations such as setting and changing the magnification ratio in the magnification setting mode as necessary. By doing this, the set magnification data can be protected.
Coupled with the effect of arbitrarily setting the copying magnification, this is extremely useful in a copying machine having the function of setting an arbitrary copying magnification.

[Brief Description of the Drawings] Fig. 1 is a diagram showing an example of a copying machine to which the present invention is applied;
Figure 2 is a diagram showing the positional relationship of lenses in the copying machine shown in Figure 1, Figure 3 is a perspective view of the mirror moving machine 11^ in the copying machine shown in Figure 1, and Figure 4 is a diagram showing the positional relationship of lenses in the copying machine shown in Figure 1. FIG. 5 is a plan view showing the operation panel of the copying machine shown in FIG. 1, FIG. 6 is a block diagram showing an embodiment of the present invention, and FIG. The output circuit diagram used in the embodiment, FIG. 8 is a flowchart showing the general operation of the main part of this invention, FIG. 9 is a flowchart showing a specific magnification setting program, and FIG. 10 is a numerical input and display method for the setting magnification. A flowchart showing an example of FIG. 11 (al,
("it icl" is a flowchart showing the details of the magnification setting program 29-, FIG. 12 is a flowchart showing the details of the program of FIG. 11, and FIGS. , 1st
Figure 5 is a flowchart showing the copying operation, and Figure 16 is the flowchart showing the copying operation.
6 is a time chart showing a main part of the copying operation shown in FIG. 5. FIG. 72...Display device, 71...Print switch, 80
~89...Numeric keypad, 98, 100~103...Magnification selection key, 107...
・Protect key, 108...protection release key,
109...Protect display. Patent applicant Minolta Camera Co., Ltd. 30- JP-A Sho GG-33576 (14) Figure 15 JP-A Sho GO-33576 (16) Range/C figure

Claims (1)

[Claims] 1. A plurality of magnification selection keys, externally operable numerical input means, storage means corresponding to each of the magnification selection keys, and the ''
fly (i1i the numerical value manually calculated by human means,
The operation mode of the copying machine is set so that the value stored when the magnification selection key is operated becomes the copy magnification. a mode specifying means for specifying a mode for prohibiting the storage of numerical values associated with the operation of the magnification selection key; and a canceling means for canceling the mode; 1. A copying machine comprising display means for displaying that a prohibition mode is in effect when a selection key is operated to store numerical values.