JPH02289867A - Image forming device - Google Patents

Abstract

PURPOSE:To allow an operator to conform the number of papers on which an image is produced and an image producing magnification without being puzzled by displaying the number of papers and a magnification through the use of a single numeric display means, and displaying a magnification when image producing magnification input is operated. CONSTITUTION:A CPU 201 controls the numeric display means 72 so that it displays the number of papers on which can image is produced, but it displays an image producing magnification when an operation means 204 is operated. The image producing magnification of the image forming device is altered according to the operation of an input operation means 204 for inputting an image producing magnification. On the other hand, when a clear stop key is operated, the displayed numeric value is cleared, a magnification setting mode is cancelled, and consequently the normal set value of the number of copying papers is dispayed. Thus, an operator can confirm the number of papers on which an image is produced and an image producing magnification without being puzzled.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an image forming apparatus whose image forming magnification is changeable and allows an operator to select a desired image forming magnification.

In a so-called variable copying magnification type copying machine that enlarges or reduces technical manuscripts, one has been proposed in which the set copying magnification is displayed on a numerical display means using an LED element or the like.

On the other hand, some copying machines are known that are equipped with a display device for displaying the number of copies.

Problems to be Solved by the Invention As mentioned above, displaying the copy magnification and the number of copies are both very useful for the operator, but it is necessary to have a copy magnification display device and the number of copies in one copying machine. Providing both display devices not only increases the cost of the device, but also makes it difficult to immediately determine which display device is displaying the zoom magnification, which may confuse the operator. .

The present invention has been made in view of the above points, and it is an object of the present invention to provide an image forming apparatus that allows an operator to check the number of images to be formed and the image magnification without being confused.

In order to achieve the above object, an image forming apparatus of the present invention is an image forming apparatus capable of changing an image forming magnification, and includes a numerical display means, an input operation means for inputting the image forming magnification, and an input operation means for inputting the image forming magnification. A magnification control means for changing the image forming magnification of the image forming apparatus in response to an operation, and controlling the numerical display means to display the number of images to be formed, while changing the image forming magnification when the operation means is operated. The present invention is characterized by comprising display control means for controlling the numerical value display means to display the numerical values.

husband service 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 according to the present invention. A photoconductor 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 charger 3, a sub eraser lamp 4, and a main charger 5.
, a developing device 6, a transfer charger 7, a copy paper separation charger 8, and a blade type cleaning device 9 are provided.

The photoreceptor drum 1 has a photoreceptor layer provided on its surface, and this photoreceptor is sensitized and charged by passing through the eraser lamps 2 and 4 and the chargers 3 and 5, and the optical system 10
receives image exposure from.

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) and a movable mirror 11.
, 12, 13, a lens 14, and a mirror 15. The light source and the movable mirror 11 move to the left at a speed of (v/n) (where n: copying magnification) with respect to the circumferential speed (V) of the photosensitive drum 1 (constant regardless of whether the magnification is the same or variable magnification). The movable mirrors 12 and 13 are driven by a DC motor M3 so as to move to the left at a speed of (v/2n). When changing the copying magnification, the lens 14 moves on the optical axis and the mirror 15 moves and swings, but such a magnification changing device will be described in detail later.

On the other hand, there are paper feed rollers 21 on the left side of the copying machine body.
.
, a conveyor belt 27, a fixing device 28, and a discharge port-ra pair 29.

Next, a mechanism for moving lenses, mirrors, etc. for changing magnification will be explained with reference to FIGS. 3 and 4. This magnification change mechanism allows virtually stepless selection of magnification from enlargement to reduction, specifically from enlargement (X1.414) to same size (x1) to reduction (X0.647). The magnification can be selected as appropriate.

The magnification changing mechanism generally includes a lens moving mechanism 35, a mirror moving mechanism 40, a mirror swinging mechanism 55, and a stepping motor M4 that drives these.

The lens moving mechanism 35 movably attaches the lens 14 on a guide rail 36 installed parallel to the optical axis, and rotates a drive wire 37 wound around a drive bobbly 32 fixed to the output shaft 3l of the stepping motor M4. The drive wire 37 is stretched between flexible pulleys 38, 38, and the middle part of the drive wire 37 is fixed to the side of the lens l4. Therefore, by rotating the stepping motor M4 forward and backward at a predetermined rotation speed, the drive wire 37 is rotated forward and backward via the drive pulley 32, and the rail 14 is moved along the guide rail 36 on the optical axis as shown in FIG. It moves left and right and stops at a position according to the magnification.

The mirror moving mechanism 40 has a guide shaft in which the mirror 15 is fixed on the back side to a shaft 43 rotatably supported by a moving body 41, and side pieces 42 of the moving body 41 are set parallel to the optical axis. 45, and a rotatable roller 44 provided at the end of the shaft 43 is placed on an auxiliary guide rail 46. Also, a bracket 49 is attached to the moving body 41.
The movable body 41 is urged toward the cam 53 by a coil spring 48 whose one end is fixed to the bin 47. A gear 33 fixed to the output shaft 31 of the stepping motor M4
is engaged with a gear 52 fixed to one end of the support shaft 51, and the cam 53 is fixed to the other end of the support shaft 51.

Therefore, the rotation of the stepping motor M4 is controlled by the gear 33.
is transmitted to the cam 53 via the gear 52 and the support shaft 5l,
The movable body 4l, that is, the mirror 15, moves back and forth on the optical axis according to the peripheral shape of the cam 53, and corrects the optical path length as the magnification changes. That is, the lens l4 and mirror 15 are driven in conjunction with each other by a stenobing 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 can be continuously adjusted in order to perform stepless magnification, but if this is done stepwise, a mechanism that selects several types of magnification is used. be able to.

On the other hand, the horizontal mirror rocker 55 brings the periphery of a rocking drive force arm 57 fixed to a rotatable support shaft 56 provided on the movable body 41 into contact with the back surface of the mirror 15, so that the mirror 15 is moved around the shaft 4.
A coil spring 58 wound around the cam 57 is biased toward the cam 57, while a pinion gear 59 fixed to the spindle 56 is engaged with a rack 60 attached to the main body of the copying machine.
extends in the W row with the guide shaft 45. This mirror swinging mechanism 55 corrects the problem in that the exposure point where the optical axis of the light beam reflected by the mirror 15 hits the photoreceptor drum l is shifted by simply moving the mirror 15 when changing the magnification. Even when changing, the mirror 15 is swung so that the optical axis is directed to the same exposure point. That is, when the movable body 41 moves back and forth in accordance with the change in magnification, the pinion gear 59 rolls on the rack 60, the cam 57 rotates together with the support shaft 56, and the mirror l5 moves around the shaft according to the circumferential shape of the cam 57. 43
The exposure point is corrected by swinging around the fulcrum.

In this case, the rocking angle of the mirror 15 is positioned such that the optical axis of the light beam reflected by the mirror 15 is directed toward the center of the photoreceptor drum l at maximum magnification (at the time of magnification in this embodiment), and at smaller magnifications. The optical axis is adjusted so that it points to the same exposure point as the exposure point at maximum magnification. Since the slit-shaped image is enlarged and projected, the distortion of the exposed image is most noticeable, and by making the light incident perpendicularly to the photosensitive drum 1 on the optical axis at maximum magnification, the overall deviation of the angle of incidence can be reduced. This makes distortion of the exposed image less noticeable.

1! FIG. 5 shows the arrangement of the operation keys on the operation panel of the copying machine. The operation panel 70 includes a print key 71 for starting the 1V copying operation, and a numerical display device 72 capable of displaying 4-digit numerical values, 1, 2, . . . , 9, respectively.
, 0 numeric keypad 80. 8 9. Interrupt key 90 for specifying interrupt copying, clear ston knob key 91, paper selection key 92 for specifying the copy paper loaded in multiple stages by size, for changing and specifying the copied image density step by step. up and down key 9
3.94 and key group 9 related to the copy magnification setting device of the present invention
5 to 103 etc. are arranged.

First magnification setting key group 9 5, 9 6, 9 7.9 8
is arranged for the purpose of arbitrarily setting the magnification, and when the first magnification setting mode switching key 99 is operated,
? When the control mode of the V-photograph machine is switched to the first magnification setting mode, when any key is operated, the numerical value inputted by the numeric keypad and displayed on the display device 72 will be changed to the value input by the numeric keypad and displayed on the display device 72. The copy magnification is stored in the memory corresponding to the key.

Second magnification setting key group 100, 10 1.102103
, the predetermined copy magnification is preset in the corresponding memory, and the copying operation is executed based on the preset numerical value without having to set the numerical value as in the case of the first key group above. consideration has been given to making it possible. Therefore, the copy magnification to be preset is selected, for example, a magnification that is considered to be commonly used for each destination at the factory shipping stage. This will be explained in detail later.

In this way, the first group of keys allows the user to arbitrarily set the required copy magnification, and the second group of keys are commonly used, for example, for domestic specifications, A4→B5, B4→A4. ,A
3→A4, or. They are given different functional roles such that the magnification corresponding to A4→A3, etc. is reset. However, since the numerical value preset for the second key group is a general or calculated copying magnification, the actual copy obtained may differ from that copying magnification due to mechanical or design errors. may vary slightly.

For example, even if you select the same size (×1), the actual size is (×1
．． 004) or (X0.996) 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. Set any numerical value in the memory corresponding to each key 100 to 103 with a simple operation,
It is possible to obtain the desired copy magnification. in particular,
For the same size key, the numerical value is 1.002 or 0. 9 9 8 can be sesotho.

110 is a magnification display key used when setting the magnification according to the present invention, 111 is a magnification increase key, and 112 is a magnification decrease key.

FIG. 6 shows a control circuit used in the magnification setting device of the present invention, in which 201 is a 2nd ICPU, 202 is a 2nd CPU, 2
03 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 variable magnification, and 207 is a decoder. Note that the output terminal AI
to A7 are the main motor Ml and the developing motor N, respectively.
13. Transistors for driving and switching the timing roller clutch CLI, upper paper feed clutch CL2, lower paper feed clutch CL3, charger 5, and transfer charger 7 (
(Fig. 7).

Various data for controlling copying operations are written in the RAM 203 or shifted from the ROM in the CPU and stored therein.
Corresponding to the memory Ql. Q2. 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 memory Q1, and when the selection key 100 is turned on, the magnification is read out. The magnification is then written to or read from the memory Q2.

Also, for selection keys 95 to 98, memories Q5 and Q6 are
, Q7, and Q8 are provided in the same manner as described above, and for example, when the selection key 95 is turned on, the magnification is written in or read out from the memory Q5.

FIGS. 8 to 17 are flowcharts showing processing procedures for magnification setting and copying operation control executed in the first CPtJ. 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 CPU.

In steps SL and S2, the memory Ql-
The magnification resetting process for Q4 is executed. Details of this process are shown in FIG.

In steps S3 and S4, when the copying machine is not in operation, each selection key 95 to 98 or 100 to 10 is pressed.
A process for associating and setting magnification A-H to 3 is executed. Details of this process are shown in FIGS. 10 to 12.

In step S5, data for controlling the lens position and motor drive speed is transferred to the second CPU 202 in accordance with the magnification determined in step S4.

When transferring this data, the 20th PU 202 processes this by interrupting.

Details of step S5 are shown in FIGS. 13, 14, and 17.

In step S6, other processes such as controlling the temperature of the heater of the copying machine and determining the size of copy paper are collectively shown.

In step S7, processing for controlling the copying operation is executed. Details of this process are shown in FIG. In addition, the first
FIG. 6 is a time chart showing the operation.

FIG. 9 is a flowchart showing details of the initial setting process for resetting predetermined numerical values in the memories Q1 to Q4 corresponding to the second magnification setting key group ioo-i03. The initial switch in the steno knob s■ in FIG. 8 is a switch set in a position in the copying machine that cannot normally be operated, so that it can only be released during assembly at the factory or for service personnel, for example.
The process shown in FIG. 9 is executed only when this switch is operated.

The numerical values preset in the memories Q1 to Q4 are determined by the on/off states of the switches associated with the operation of the keys 105 and 106 shown in FIG. Alternatively, at the factory shipping stage, etc., the operator turns on and off the switch 4 notches 105 and 106 according to combinations predetermined by the destination, etc., and sets the initial switch to the blank position to store the predetermined information in the memories Ql to Q4. The value of is reset. The next process is to set the multiplier values for the on/off combinations of the switches 105, 106 stored in the first cPU 201 in the memories Q1 to Q4. Table 1 shows specific examples of preset values for off combinations.

When setting numerical values as copy magnifications in memories Q1-Q8 corresponding to table selection keys 95-98, 100-103, the processes shown in FIGS. 10-12 are executed.

In FIG. 10, in steps sioi and sto2, when the key 99 or 104 is operated to switch to the copy magnification setting mode, it is possible to determine which key group, the first or second key group, is requested to set the magnification. It will be judged. key 99
When is operated, the mode is the first copy magnification setting mode,
Set flag A to "1". When the key 104 is operated, flag B indicating the second copy magnification setting mode is set to “1”.
to cenot.

When the key 99 or 104 is operated, in either case, in steps S103 and S105, a process is executed in which the 1000th place flag is set to "1" and the display of the 1st place is set to "0". That is, when the control of the copying machine is switched to the magnification setting mode, the numerical display device 72 displays "bbb o" (
(b is blank) is displayed, and a standby state is entered in which input is accepted from the 1000th digit.

If the numeric keypad is operated in this state, step S107
The type of key is determined, and only when "1" is 80, the process advances to step S108 and "B" is displayed at the 1000th place.

Note that here, 1 is used for convenience due to the relationship with the numerical display device 72.
Numerical values input in terms of 000th place, 100th place, 10th place, and 1st place will be explained, but the numerical value as a magnification is treated as a decimal number with three digits after the decimal point and four significant digits.

If the 1000th flag is "l" and the input value is 0 or 2 to 9, proceed to step Silo and set 10.
Display “0” in the 00th place. Next, if the input is "0", the process advances to step S109 as well as the case of rlJ, and 1 is input.
Set the 000th flag to “0” and set the 100th flag to “1”
If the input is 2 to 9, the 1000th place flag is set to "0" in step S112, and the process advances to step 8115 to change the input value to 100.
Display in digits.

The above processing when the too flag is “1” is:
It is based on the premise that numerical values in the range of 0.847 to 1.414 are treated as valid copying magnifications, and therefore only "0" can be displayed in the 1000th digit. By doing this, the 1000th digit “
This simplifies the key operation when inputting 0". Even if such processing is performed, depending on the number entered below the 100th place, the number may fall outside the range of the above effective copy magnification. The processing in this case will be explained in the subroutine section of FIGS. 11 and 12.

When a numerical value is entered in the 1000th place digit, the 100th place flag becomes “1”, and when the numeric keypad is operated in this state, 10
A numerical value corresponding to the operated key is input to the 0th place digit, and in step S115, the numerical value is displayed, and in step S116, a process is executed in which the 100th place flag is set to "0" and the 10th place flag is set to "BI". Hereinafter, the input of the 10th place and the 1st place are also performed by operating the numeric keypad.

The flowchart of FIG. 11 shows the process of storing the numerical values input and displayed in the process of FIG. 10 in the memory corresponding to the selection key operated next.

In step S201, first, it is determined whether the mode is the first magnification setting mode or the second magnification setting mode. Since step S201 is executed only when either flag A or B is "1", here, for example, only a determination as to whether flag A is 1 m is executed, and flag A is "1". ', the mode is the first magnification setting mode, so the process advances to step 8218 and subsequent steps to determine the operation of the first selection key group 95 to 98, and if flag A is not "1", that is, flag B is "l". Since this is the second magnification setting mode, the process advances to step S202 and subsequent steps in which the operation of the second selection key group 100 to 103 is determined.

In the process shown in FIG. 11, in any magnification setting mode, the displayed numerical value is basically stored in the memory corresponding to the operated selection key. However, as described above, at this stage, a value that is not within the range of permissible copying magnifications may be displayed.

Therefore, in the process shown in FIG. 11, after determining the operation of each key, the subroutine shown in step S203 is executed to prevent a value outside the permissible range from being stored in the memory. FIG. 12 shows the process of step S203.

In FIG. 12, if the display is not "O", the displayed numerical value is 0. 6 4
It is determined whether or not it is smaller than 7. If it is smaller, the display is changed to 0 in step S231. 6 4 7.

Also, in step S232, the displayed value is 1.4.
It is determined whether or not it is greater than 14, and if it is greater, the display is set to 1.414 using the steering knob S233.

Therefore, to explain the relationship with Fig. 4, when a predetermined selection key is operated in the magnification setting mode, if the displayed value is outside the allowable range, the display changes to the allowable limit value and then , stores the displayed 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 case of the first magnification setting mode, and flag B is set to "0" in the case of the second magnification setting mode, and the process advances to step 8206.

Steps 8206 to S208 show processing when the clear stop key 91 (see FIG. 5) is operated. When Clear Stop Cow-91 is pressed, Steve S20
7. In S208, "bbb 1" is displayed on the display device 72.
is displayed, and flags A and B are set to "0".

That is, when the clear stop cow-91 is operated, the displayed numerical value is cleared and the magnification setting mode is canceled. Therefore, the number displayed by this “
B is "l" as the standard setting value for the number of copies.

13 and 14 respectively show the second selection key group 100~
103 and the first selection key group 95 to 98 are operated.

In FIG. 13, keys 100, 101, 102 and l
03, the light emitting diodes 100a, 101a .
Of 102a and 103a (see FIG. 5), the one corresponding to the operated cow is lit, and then the second CPU 202 uses the numerical value stored in the memory as magnification data.
The process then proceeds to step 8406 in FIG.

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 an arbitrary magnification is set, so steps S402 and S408 .5415 and the numerical values set in the corresponding memories Q5 to Q8 in S420 are displayed on the display device 721. This display is displayed only when each key is pressed, for example.
When the key is released, the display device 72 is set so that the number of copies set in another storage device is called up and displayed. In the case of this first selection key group as well, the numerical value stored in the memory corresponding to the operated key is "0".
”, the value is used as the magnification data for the second CP.
Transferred to U202, and if “0”, step S412
Proceed to.

FIG. 17 is a flow chart showing a magnification setting method by operating the increase key 111 and decrease key 112.

In this case, the process passes through step E in the flowchart of FIG. 14 and proceeds to step S501 of FIG. 17. The rising edge at which the increase key 111 is turned on is determined, and if YES, in step S502, one of the light emitting diodes 95a to 103a corresponding to the currently selected magnification key is turned off, and in step S503 Set the auto-increment timer. Then, as will be described later, when this automatic increase timer finishes counting a predetermined period of time, for example, 0.5 seconds (steps S522, S523), a rising signal similar to that when the increase key 111 is turned on is generated.

Then, in step S504, the CPU 201 increases the magnification by one unit (for example, O.O.O.2), and the process proceeds to step S505. Step S505.3506 determines whether the magnification does not exceed 1.414 and determines whether the magnification is 1.414.
．． It is limited to 1.414 so that it does not become larger than 414.

The magnification is sent to the second CPU 202 in step S507,
As described above, the second CPU 202 controls the lens position through interrupt processing, and enables copying at the set magnification.

Also step 35 18. In S519 and S520, it is determined whether any of the increase key 111, decrease key 112, and magnification key 110 is turned on, and only when YES, the magnification is displayed on the display device 72.

The process then proceeds to the next step S522, reads the time counting state of the increment timer, and, for example, when 0.5 seconds have passed after the timer was set, it is assumed that the increment timer has finished counting in step S522, and a YES determination is made, and the increment key is pressed. 111
It emits a signal similar to the rising edge of . And again Ste-y
Return to step S501. The above operation is repeated while the increase key 111 is turned on, and the magnification increases by 002 areas every 0.5 seconds.

When the increase key 111 is turned off, a falling edge of the increase key signal is determined, the process advances to step S509, the increase timer is reset, and the change in magnification is completed.

When the decrease key 112 is turned on, step S501
, 3508 and proceeds to S510, and if it is determined that the decrease key 112 is on, the process proceeds to step 3511.
Light emitting diodes 95a to 1 corresponding to the magnification key with a
03a is turned off, and an automatic decrease timer is set in step S511. Then, every 0.5 seconds, the magnification is decreased by 0.002 in Step 7'S512.

This operation continues as long as the decrease key 112 is turned on. If the magnification is 0.646 or less, step 5
514 limits the magnification to 0.647 and prevents it from decreasing below that.

The above-mentioned magnification setting operation is performed to modify the magnification already stored in the memo IJQ1 to Q8, and the modified magnification can be used once or a series of copying operations are completed. After that, it returns to the original magnification.

Note that if the increase key 111 is turned on only once for a short period of time,
The unit amount can increase the magnification by 0.002. Turning the decrease key 112 on only once for a short period of time will decrease the magnification by a unit amount.

Furthermore, when the increase cow 111 and decrease key 112 are operated, the numerical value displayed on the display device 72 is not changed, and the numerical value read out before the operation of the cow 1 is continued to be displayed, while the number of times the magnification has changed is displayed on another display device. It may be displayed, or a display lamp may simply be blinked every time the numerical value changes.

Furthermore, if the increase key 111 and decrease key 112 are kept on, the rate of change of the numerical value may be made faster in accordance with the time of the operation.

The above is an explanation of the setting operation in the magnification setting device of the present invention. As is clear from this explanation, according to this magnification setting device, any copying magnification required by each user can be easily set using the first magnification setting mode, and the magnification can be set at any time as necessary. You can check the set magnification on the display and use the value as control data for the copying machine. In addition, according to the second magnification setting mode, the work is mainly to correct the magnification by reading the error with the numerical copy magnification from the copy actually obtained with a preset predetermined copy magnification. The effect achieved is that this can be carried out very easily.

Further, by operating the increase key 111 and the decrease key 112, the preset magnification value can be finely adjusted only during the copying process, so that the desired magnification can be obtained very easily. This type of operation is effective when using a copying magnification that is not often used.

With respect to the numerical value set in this way, the movement of the lens 14 is controlled by an interrupt process of the control device 206 based on the output of the second CPU 202 in accordance with the copying magnification. , number 0
．． The drive is controlled in both forward and reverse directions so that it rotates by 1 bit relative to 001 or 0,002. Therefore, the increase key 111. 0.00 by operating the decrease key 112
The magnification may be changed in increments of 2, and the display may be associated with the smallest adjustable unit of the copy magnification. In addition, the second CPU 2 controls the moving speed of the optical system to be variable according to the set numerical value.
The speed control of the direct current DC motor, which is the drive source, is controlled by the control device 205 based on the output of the drive source 02. Many methods have been proposed or provided in the past, and will not be described in detail here.

In FIG. 5, the panel portion 70a adjacent to the first selection key group 95 to 98 can be configured as a whiteboard that can be written on and erased with a prescribed 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 → A4J".The panel part 70a is recessed with other panel parts as necessary. Alternatively, a convex step may be provided.

Rapid 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, the developing motor M2 . The charging charger 12 and the transfer charger 14 are activated, a copy flag indicating that a copy operation is in progress is set to "1", and a control timer T-
Start A, T-B, and turn on the clutch of the paper feed roller on the selected side.

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

In block 12, the end of timer T-B is determined, and
Turn on the scan motor M3 to start the scan operation.

In block l3, 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 T1C 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 mode, and timing roller clutches 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 and the transfer charger l4 are 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 Ml is turned off. Block 17 executes processing for various outputs.

Note that the timer T-A-T-D, etc. explained in the above flowcharts and time charts are configured so that they are counted annobbed in one routine of the processing of the MC50, which is executed within the time specified by the internal timer. This is a digital timer that is programmed into the timer, and the timer and output times are stored as numerical data.

Effects As detailed above, in this invention, one numerical display means is used both to display the number of sheets and to display the magnification, and when the image forming magnification is inputted, the magnification is displayed, so that the operator is confused. The number of images to be formed and the image magnification can be checked without any trouble, and the operation is simple.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a copying machine to which the present invention is applied;
Fig. 2 is a diagram showing the positional relationship of lenses in the copying machine shown in Fig. 1, Fig. 3 is a perspective view of the mirror moving mechanism in the copying machine shown in Fig. 1, and Fig. 4 is a diagram showing the mirror movement mechanism in the copying machine shown in Fig. 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. 7 is an embodiment of the copying machine shown in FIG. 6. 8 is a flowchart showing a schematic operation of the main part of the present invention, FIG. 9 is a flowchart showing a setting program for a specific magnification, and FIG. 10 is a flowchart showing an example of a method for displaying a set magnification. , FIG. 11 is a flowchart showing details of the magnification setting program, and FIG. 12 is a flowchart showing details of the subroutine in the setting program of FIG.
, FIG. 13 is a flowchart showing a reading program for a specific magnification, FIG. 14 is a flowchart showing a reading program for an arbitrary magnification, FIG. 15 is a flowchart showing a copying operation, and FIG. 16 is a flowchart showing the main points of the copying operation shown in FIG. 15. FIG. 17 is a flowchart showing the operation for correcting the magnification using the increase key and the decrease key. 72...Display device, 71...Print switch, 80
~89...Numeric keypad, 95~98.100~103・
...Selection key, 111...Increase key, 112...Decrease key Fig. 7 Fig. 9 Fig. 12

Claims (1)

[Claims] (1) In an image forming apparatus capable of changing an image forming magnification, a numerical display means, an input operation means for inputting an image forming magnification, and an image forming apparatus of the image forming apparatus according to the operation of the input operation means. A magnification control means for changing the magnification, and a display control for controlling the numerical display means to display the number of images to be formed, and for controlling the numerical display means to display the image formation magnification when the operation means is operated. An image forming apparatus comprising: means.