JPH0797257B2 - Electronic copier - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic copying machine, and more particularly to a copying process, for example, an operating voltage in a charging process is set later, and the copying process is performed based on the set operating value. The present invention relates to an electronic copying machine in which

(Prior Art) Conventionally, the operating value of each copying process, such as the operating voltage of the charging corotron, is set by adjusting or switching the adjusting volume or DIP switch provided on the printed circuit board. It was However, the setting work using such an adjusting volume and dip switch is very complicated.

Therefore, in recent years, a device capable of eliminating such complication has already been realized. An example of such an electronic copying machine is "NP-3525" manufactured by Canon Inc., for example. In this conventional electronic copying machine, the exposure voltage, the developing bias voltage, the transfer voltage, and the separation voltage need to be adjusted by software without adjusting the volume, dip switch, or the like, that is, without adjusting the hardware. Setting, that is, setting by a microcomputer program is possible.

(Problems to be Solved by the Invention) In the above-described conventional technique, the operation value can be adjusted by software, and the complexity of the adjustment work is somewhat eliminated. However, for example, with the exposure voltage and the developing bias voltage,
The standard value is different, the reference value of the exposure voltage is
100V, the reference value of the developing bias voltage is 300V, for example
Therefore, the serviceman stores the standard operation value for each process for each model,
Alternatively, the adjustment work had to be carried out with reference, and the complexity of the adjustment was not yet released.

Therefore, a main object of the present invention is to provide an electronic copying machine in which the operating value of the copying process can be easily set.

(Means for Solving Problems) The present invention provides an image forming unit, a setting mode for setting an operation value of an image forming process of the image forming unit, and an operation value set in the setting mode. Mode switching means for switching the execution mode for executing the process based on the first mode, first storage means for storing the standard operation value of the process of the image forming means, and the setting mode. In the setting mode, the first display means for displaying the standard operation value stored in the first storage means as zero, and the operation value of the process is input with the zero as a reference. For inputting the operation value input by the first input means as a set operation value based on the standard operation value, and in the setting mode. A second display means for displaying a setting item desired to be set from a plurality of processes, and a second display means for inputting a numerical value corresponding to the setting item when the setting item is selected. The setting item is confirmed by inputting the input device and the second input device a predetermined number of times, and the confirmed setting item is displayed on the second display device based on the standard operation value. The electronic copying machine is characterized in that the electronic copying machine is provided with a confirming unit for displaying the set operation values on the first display unit.

(Operation) When the mode is switched to the setting mode by the mode switching means, the first display means displays the standard operation value of each process stored in the first storage means as zero. For example, if the standard developing bias voltage of the developing device is 300V, this 300V is displayed as 0V on the first display means.

In the setting mode, the operating value of the process can be input by the input means. At the stage of switching to the setting mode, for example, the developing bias voltage is returned to the standard 300V, and if it is desired to set 330V, 30V may be input by the input means. In this way, when the standard operation value is set to zero and the operation value to be set is input, the second display means displays the value, for example, 30V.

When the operation value of the process is input by the input unit, the input operation value is stored in the second storage unit as an operation value based on the standard operation value. For example, when 30V is input as the developing bias voltage, 330V (= 300 + 30) is stored in the second storage means.

Then, when the execution mode is switched by the mode switching means, the image forming process is performed on the basis of the operation value stored in the second storage means, for example, when the developing bias voltage is 330 V, the developing process is performed.

(Effect of the Invention) According to the present invention, when selecting a setting item desired to be set from a plurality of processes, a second input means for inputting a numerical value corresponding to the setting item, and a second input means. The setting items are confirmed by inputting the input means a predetermined number of times, the confirmed setting items are displayed on the second display device, and the set operation values based on the standard operation values are displayed on the first display device. Since it has a confirmation means for displaying,
Since it is not necessary to enter the confirmation indicating the confirmation after inputting the numerical value corresponding to the setting item, the setting item can be selected quickly and surely. Therefore, according to the present invention,
Completely free from the complexity of adjustment in the setting mode.

The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the drawings.

(Embodiment) FIGS. 2 and 3 are structural views of an embodiment of the present invention. In particular, FIG. 2 shows a perspective view thereof, and FIG. 3 shows an internal structure thereof. The electronic copying machine 10 includes a main body 12. In FIG. 2, a main switch 13 of the electronic copying machine 10 is provided on the left side surface of the main body 12. A service switch 15 used for switching the electronic copying machine 10 to a service mode described later is provided on the left side of the front surface of the main body 12 with the cover opened.

A document table 14 made of a transparent glass plate is fixedly provided on the upper surface of the main body 12. An automatic document feeder 16 is attached to the upper part of the document table 14 by the hinge of its end. The automatic document feeder 16 includes the documents 18 placed on the document table 20.
Included are a plurality of rollers 24 and endless belts 26 for picking up and transporting. The copied document that has passed through the automatic document feeder 16 is sent to the document tray 22.

An exposure light source 28 as a scanning unit for exposing and scanning the document 18 is provided below the document table 14 in the main body 12. The exposure light source 28 moves from one end side of the document table 14 to the other end side,
And it is made movable in the opposite direction. This exposure light source 28
The leftward and rightward movement of the is achieved by driving by a servomotor (not shown). A reflecting mirror 30 having an elliptical cross section is provided in association with the exposure light source 28. A first movable mirror 32 is fixed to the reflecting mirror 30. When the exposure light source 28 is moved forward by the servomotor to the right in FIG.
A document 18 placed on 14 is slit-exposed. However, when the exposure light source 28 is moved back to the left in FIG. 2, no exposure is performed.

Associated with the first movable mirror 32 is a pair of second movable mirrors 34a and 34b. The pair of movable mirrors 34a and 34b are
The original image reflected by the first movable mirror 32 forms an image forming lens.
It is for reflecting again toward 36. This second
Movable mirrors 34a and 34b are half of the moving speed of the exposure light source 28.
The exposure light source 28 is moved in the same direction at a speed of. In addition,
The imaging lens 36 is composed of a zoom lens, and therefore, the copy magnification can be changed in this embodiment.

In front of the imaging lens 36, a fixed reflecting mirror 40 for reflecting the original image transmitted through the lens 36 toward the photosensitive drum 38 is provided. An infrared absorption filter 42 is inserted between the fixed reflecting mirror 40 and the photosensitive drum 38.

A partial erase lamp 46 is provided upstream of the exposure position of the photosensitive drum 28, that is, the position where the document image is formed by the reflecting mirror 40. The partial erase lamp 46 is for removing an unnecessary electrostatic latent image on the photosensitive drum 38. A charging corotron 48 for charging the photosensitive drum 38 with a uniform charge of a specific polarity is provided on the further upstream side of the partial erase lamp 46.

A developing device 54 is provided downstream of the exposure position of the photosensitive drum 38. The developing device 54 develops the electrostatic latent image formed on the photosensitive drum 38 by the charging corotron 48, the exposure light source 38, and the imaging lens 36 using toner. Development device
In relation to 54, a stirring roller 56 for stirring the toner
And a supply roller 58 for supplying the charged toner to the photosensitive drum 38.

A paper feeding unit is formed on one side of the main body 12. Two sheet feeding cassettes 66 and 74 are detachably attached to the sheet feeding section in the figure. Papers 44 of different sizes are stacked in the paper feed cassettes 66 and 74, respectively. A compression spring 68 and a support plate 70 for pressing the stacked papers 44 upward are provided at the inner bottoms of the paper feed cassettes 66 and 74. By this spring 68 and the support plate 70, the paper feed cassette
The uppermost one of the papers stored in 66 and 74 is pressed against the paper feed roller 72. The rotation of one of the two paper feed rollers 72 sequentially feeds the pressed paper 44 from the paper feed cassette 66 or 74 to the register roller 80 one by one. A manual paper feed tray 78 is provided in association with the upper paper feed roller.

A transfer corotron 62 and a separation corotron 64 are integrally provided on the downstream side of the developing device 54.

When the paper 44 is supplied from the paper feed cassette 66 or 74, the toner image formed on the photosensitive drum 38 is transferred to the transfer corotron 62.
Is transferred to the paper 44 by. At the time of transfer by the transfer corotron 62, the paper 44 is sucked by the photosensitive drum 38 and tries to move together with the photosensitive drum 38, but is separated by the separation corotron 64 and is transferred toward the vacuum conveyor 92.

A cleaning device 82 is provided downstream of the separating corotron 64 along the photosensitive drum 38. The cleaning device 82 removes the toner remaining on the photosensitive drum 38 without being transferred to the paper 44. The cleaning device 82 includes a rubber blade 84 for scraping off the residual toner on the photosensitive drum 38. The residual toner scraped off by the blade 84 is sent to the waste toner container by the screw conveyor 86.

Further downstream of the cleaning device 82 is the photosensitive drum 38.
A charge eliminating lamp 88 is provided for removing the residual charge above. The charging corotron 48 described above is disposed further downstream of the static elimination lamp 88.

The paper 44 separated from the photosensitive drum 38 by the separating corotron 64 is sent to the fixing device 90 by the vacuum conveyor 92. The fixing device 90 includes a heating roller 96 having a heater 94 built therein and a pressure roller 98 for pressing the paper against the heating roller 96. Therefore, the toner image transferred on the paper 44 is heated and pressed by the two rollers 96 and 98 to be fixed on the paper 44. The paper 44 after the fixing is discharged onto the paper discharge tray 102 by the pair of paper discharge rollers 100a and 100b.

Further, a control box is provided above the fixing device 90 in the main body 12.
106 is formed. In the control box 106, a
The circuit components 108 for the illustrated control system are housed.

An operation panel 110 is provided on the front upper surface of the main body of the electronic copying machine. Referring to FIGS. 2 and 4, the right panel 112 of the operation panel 110 is provided with a start key 112a at the right end for instructing the start of the copying process. A reset key is provided on the start key 112a. On the left side of the start key 112a, there is a clear / clear key for canceling the set number of copies and stopping the copy operation halfway.
A numeric keypad 112d including a stop key 112b and an interrupt key 112c for performing interrupt processing is provided. The number of copies set with this numeric keypad 112d is displayed on the left side
Displayed at 112e. The number display 112e is a 3-digit display composed of a 7-segment display.

When the start key 112a and the numeric keypad 112d are operated in a predetermined procedure together with the main switch 13 and the service switch 15 described above, the electronic copying machine 10 is switched to a normal copy mode, service mode or adjustment mode. Then, when switched to the adjustment mode, the copy number display 112e displays the adjustment item in the adjustment mode instead of the number of copies. Note that this point will be described in detail later.

Below the copy number display 112e, a density display 112f for displaying the density of the copied image is provided. The density of the copied image is set by the three keys 112g including the up key, the down key, and the auto key. The set density is displayed on the density display 112f in seven levels.

On the left side of the number display 112e and the density display 112f, there is provided a status display 112h for displaying the occurrence of jams, toner exhaustion, paper exhaustion and the like. On the left side of the status display 112h, that is, on the leftmost side of the right panel 112,
A paper size indicator 112i is provided for displaying the sizes of the original and the paper. Below the paper size indicator 112i,
Keys 112j to 112l for setting the size of originals and paper
Is provided.

At the lower right of the left panel 114, two magnification setting keys 114a for setting the enlargement or reduction copy magnification are provided.
The magnification set by the magnification setting key 114a is displayed on the upper magnification display 114b. The magnification setting key 114a works effectively when the original size setting key 112l and the same size key 112k are not operated. That is, when the original size setting key 112l and the paper selection key 112j are operated, the automatically set copy magnification is displayed on the magnification display 114d.
Is displayed in.

Further, in the normal copy mode, the numerical value displayed on the magnification display 114b is the set copy magnification, but in the adjustment mode, the displayed numerical value is not the copy magnification,
Display standard operating values for each process, as described below.

A 2-page continuous shooting key 114c is provided on the left side of the magnification setting key 114a. The two-page continuous shooting key 114c is used, for example, when copying a book original or the like, and dividing the left side and the right side of a book opened to the left and right into two sheets of paper. When the 2-page continuous shooting key 114c is operated, the LED 1 directly above
14d lights up.

Two keys 114e, a margin key and a shift key, are provided to the left of the two-page continuous shooting key 114c to shift the original image from the right for copying and to provide a margin such as a binding margin at the left end of the paper. To be Therefore, when the margin key of the keys 114e is operated, the LED on the margin key is turned on and the shift key is effectively operated. The size of the margin that can be set by the margin key has three levels, and the set size of the margin is indicated by the lighting of one of the three LEDs on the right side of the display 114f.

To the left of the key 114e is the frame width setting key and edging /
Two keys 114g of book selection keys are provided. When edging, that is, border-erasing mode is set by the edging / book select key, an LED indicating the border-erasing mode
Lights up and the display unit changes according to the set frame width.
One of the three LEDs on the left side of 114f lights up.

When the book mode, that is, the white-blank mode of the binding portion of the book is set, the LED indicating the white-blank mode of the binding portion is turned on, and three LEDs on the left side of the display 114f are displayed according to the set size. One of the LEDs lights up in the same way.

FIG. 5 is a block diagram of the control unit of the copying machine main body. The copier is controlled by a microcomputer system including MPU 116. This microcomputer system has a ROM 118 connected to the MPU 116 for storing a control program and the like, and a region for various flags required for the temporary storage of data during the control by the MPU 116. RAM120 and MPU116 are I / O interface 122 and
A D / A converter 124 is included.

The operation panel 11 is connected to the input port of the I / O interface 122.
Key input data from the 0 key matrix 126 and output from the sensor circuit 128 including a paper size sensor are input.

The output port of the I / O interface 122 is connected to a drive device 130 such as a motor or solenoid. The driving device 130 includes an exposure light source 28, a charging corotron 48, a developing device 50, a transfer corotron 62 and a separation corotron 64.
A registration clutch (not shown) for driving the register roller 80 is included, and the operating voltage and the sheet feeding timing of these are set by the MPU 116 via the D / A converter 124.

In addition, the MPU116 has a servo motor controller (LS
I) 132 is connected, and a DC servo motor 134 for reciprocally scanning the exposure light source 28 is connected to the input / output terminal of the controller 132.

Further, in a predetermined area of the ROM 118 in which a control program and the like are stored, the exposure light source 28 included in the driving device 130,
Corotron 48 for charging, developing device 54, corotron 62 for transfer,
Standard operating voltages and time values for the separation corotron 64 and the resist clutch (not shown) are stored. Then, when the operation value of each device of the drive device 130 is set, the standard operation value is read from the ROM 118, and the operation value is newly set based on the read operation value. The set operating values, that is, exposure voltage, charging voltage, developing bias voltage, transfer voltage, separation voltage, paper passage timing (time of registration clutch on timer), etc.
It is stored in a predetermined area of M120. In the normal copy mode, the drive unit is driven based on the data stored in the RAM 120, that is, the operating voltage and the paper feed timing.
The MPU 116 controls the exposure light source 28, the charging corotron 48, the developing device 54, the transfer corotron 62, the separating corotron 64, the resist clutch (not shown), and the like in the 130. Therefore, the RAM 120 is backed up by the backup opening circuit 136 so that the stored data is not lost even after the main switch 13 shown in FIG. 2 is turned off.

The pack-up circuit 136, as shown in detail in FIG.
When main switch 13 is turned on, + 5V is applied to RAM1
It is supplied to the voltage terminal Vcc of 20, but the main switch 13
When is turned off and the supply of + 5V is cut off, the voltage of the pack-up battery 146 is supplied to the voltage terminal Vcc.

That is, the emitter of the PNP transistor 138 and the cathode of the Zener diode 140 are commonly connected to the + 5V terminal of the backup circuit 136. The base of the transistor 138 is connected to the collector of the NPN transistor 142 whose emitter is grounded. The anode of the Zener diode 140 is connected to the base of the transistor 142 via the resistor. Transistor 138
The collector of is connected to the voltage terminal Vcc of the RAM 120. Further, the voltage terminal Vcc is connected to the positive terminal of the backup battery 146 whose negative terminal is grounded through the diode 144 for preventing backflow.

When + 5V is supplied, first, the Zener diode 140 is turned on and the base voltage is supplied, so that the transistor 142 is turned on. Then, the transistor 142 is turned on to form a base circuit, and then the transistor 142 is turned on.
138 is also turned on. Therefore, + 5V is supplied to the voltage terminal Vcc of the RAM 120 via the emitter-collector of the transistor 138.

When + 5V is cut off by turning off the main switch 13,
Since the transistor 138 turns off and the collector voltage disappears, the diode 144 turns on and the voltage of the backup battery 146 is applied to the voltage terminal Vcc of the RAM 120. In this way, the main switch 1 is connected to the voltage terminal Vcc of RAM120.
Since the voltage is supplied regardless of whether 3 is on or off, the stored data will not be lost.

Next, with reference to FIG. 5, the operation or operation of the electronic copying machine of this embodiment will be described based on the flowcharts shown in FIGS. 7A and 7B.

When using the electronic copying machine 10, the main switch 13 (second
Turn on (Fig.). Then, the voltage is supplied to each part of the electronic copying machine 10 and the backup circuit 136 is also +5.
V is supplied, and the voltage terminal Vcc of RAM120 is +
5V is supplied.

When the main switch 13 is turned on, the MPU 116 first
Initialize the O interface 122. And MP
U116 is the data stored in the RAM120, that is, the exposure light source 28, the charging corotron 48, and the charging corotron 48 included in the driving device 130.
Data regarding the operating voltage and the timer time of the developing device 54, the transfer corotron 62, the separation corotron 64, the resist clutch, etc. are output to the drive device 130 via the D / A converter 124. Then, in the driving device 130, based on the data given from the RAM 120, the operating voltage such as the on-timing of the exposure light source 28, the charging corotron 48, the developing device 54, the transferring corotron 62, the separating corotron 64 and the resist clutch, and the like. Time data is set.

After that, the operator opens the automatic document feeder 16 and
Place the document on the platen 14 made of a transparent glass plate so that the document surface faces upward and the centers of the documents in the width direction are aligned.
Place 18. Then, the automatic document feeder 16 is closed to fix the document 18 on the document table 14. Automatic document feeder
You can also use 16 to load document 18.

Next, when the start key 112a is operated, in a first step S101 in FIG. 7A, a main motor (not shown) for driving the photosensitive drum 38 and the like is turned on. When the rotation of the main motor stabilizes, that is, when 0.5 seconds elapses after the main motor is turned on, the cleaning device
The solenoid 82 is turned on, and the tip of the blade 84 is brought into contact with the photosensitive drum 38. If a predetermined time has passed since the solenoid was turned on, that is, 100 msec, for example, so that the power source is not simultaneously loaded, the next step S103
Proceed to.

In step S103, the MPU 116 causes the sensor circuit 128 (fifth
It is determined whether the exposure light source 28 is in the home position, that is, whether the exposure light source 28 is located on the left side of the main body 12 by looking at the signal from the drawing). If the exposure light source 28 is at the home position, the process proceeds to the next step S107, and if not, at step S105, the servo motor 134 (FIG. 5) is reversed to move the exposure light source 28 to the home position, and the exposure light source 28 is moved. To the home position. The turning off of the servo motor 134 is performed by an interrupt process described later.

Then, after the transfer corotron 62 is turned on in step S107, the process proceeds to the next step S109.

In step S109, the paper feed motor is first turned on, the paper feed roller 72 starts rotating, and the paper 44 is conveyed toward the register roller 80. When the leading end of the paper 44 is sent to the register roller 80 by the conveyance, the process proceeds to step S111.

In step S111, it is determined whether or not the exposure light source 28 is at the home position, and if it is at the home position, the step
Proceed to S113.

In step S113, the document 18 is irradiated with light (exposed).
The exposure light source 28 is turned on, and the rise of the exposure light source 28 is slow.
Proceed to. Then, in step S115, it is determined whether the copy is the first copy. If it is the first copy, the exposure light source 28 that was turned on in the previous step S113 rises slowly, so
Furthermore, for example, a stabilization time of 300 msec is taken, and step S11
Proceed to 7.

In step S117, the charging corotron 48 is turned on and the servo motor 134 is turned on.

In the next step S119, it is determined whether the exposure light source 28 has been fed to the image position. If it is confirmed that the image position has been reached, the process proceeds to the next step S121.

In step S121, the MPU 116 reads the standard count value of the registration clutch on timer stored in the ROM 118 together with the control program and the set value of the registration clutch on timer stored in the adjustment data table of the RAM 120 described later. Is read and both are added. For example, if the standard count value of the registration clutch on timer stored in the ROM 118 is "200" and the setting value of the registration clutch on timer stored in the RAM 120 is "-20", the addition result is " It becomes 180 ".

Next, in step S123, the registration clutch on timer provided in a predetermined area of the RAM 120 is set to the previous step.
The addition result calculated in S121, for example, the count value of "180" is set. This count value is the timing for turning on the registration clutch by the interrupt processing described later.

In the next step S125, it is determined whether the exposure light source 28 has been fed to the return position. If it is confirmed that the paper has been fed to the return position, the process proceeds to step S127.

In step S127, the servo motor 134 that has been turned on in step S117 of light and is rotating normally is once turned off, and then turned on again for reverse rotation. And the previous step S1
The exposure light source 28 turned on in 13 is also turned off.

Next, in step S129, the MPU 116 looks at the sheet number counter and determines whether or not continuous copying. If it is continuous copying, after confirming that the paper feed sensor is off in the next step S131,
Return to step S109. That is, for the second and subsequent copies, the process starts from step S109.

If it is determined in step S129 that the copy is not continuous, the process advances to step S133 to turn off the servo motor 134 that has been reversed in step S127. After that, the photosensitive drum 38
The time that the above electrostatic latent image is transferred to the paper 44, for example 200 mse
After c, the charging corotron 48 is turned off. Then, in step S135, the discharge sensor is detected to be off, and the process proceeds to the next step S137. In step S137, the main motor is turned off after the time required to eject the paper 44, for example, 200 msec. Then, the copying machine goes into a standby state.

Next, the interrupt routine of this embodiment will be described with reference to FIG. This interrupt routine is called by the internal timer of the MPU 116 at regular intervals.

In the first step S201, the MPU 116 performs a dynamic scan of the key matrix 126 via the I / O interface 122. That is, when various keys provided on the operation panel 110 are operated, the corresponding contacts of the key matrix 126 are turned on according to the operated key, and the MPU 116 reads the turned-on contacts to operate them. Determine which key you have.

In step S203, the MPU 116 determines whether the exposure light source 28 is at the home position, as in step 103 in FIG. 7A. If it is not at the home position, the process directly proceeds to step S207. If it is at the home position, the servo motor 134 is set at step S205.
After turning off, the process proceeds to step S207.

In step S207, it is determined whether the paper feed sensor is on, that is, whether the paper 44 has been conveyed to the register roller 80. When the conveyance of the paper 44 is confirmed, the paper feed clutch is turned off in the next step S209. If the preceding paper is being conveyed, the paper feed sensor is off, so the MPU 116 turns off the registration clutch in step S211, and then proceeds to step S213.

In step S213, it is determined whether or not time data is set in the registration clutch on timer provided in a predetermined area of RAM 120. In this step S213, "YES"
If it is determined that the MPU116, in the subsequent step S215,
It is determined whether the registration clutch on timer has timed out. Then, after the registration clutch on timer times out through several interrupt routines, the MPU 116 turns on the registration clutch in step S217. Then, the register roller 80 rotates, the paper 44 starts to be conveyed again, and moves toward the photosensitive drum 38. When the paper 44 reaches the surface of the photoconductor drum 38, if it is a normal copy without "moving", the leading edge of the paper 44 and the electrostatic latent image formed on the surface of the photoconductor drum 38 will be used. The tip of the image coincides.

After the registration clutch is turned on in step S217, the process returns to the main routine shown in FIGS. 7A and 7B, as in the case where “NO” is determined in previous steps S213 and S215.

Prior to the description of the operation in the adjustment mode, the outline of the adjustment mode will be described with reference to FIGS. 4 and 9.

When the electronic copying machine 10 is changed from the service mode to the adjustment mode by the key operation described later, the display of the number display 112e and the magnification display 114b of the operation panel 110 is switched as shown in FIG. 9 (B). That is, in the service mode such as when replenishing toner to the developing device 54, FIG.
As shown in, the number display 112e displays “1”,
The magnification display 114b displays "100". However, in the adjustment mode, as shown in FIG. 9 (B), the number display 112e displays only the bottom segment that displays the ones digit and the tens digit of the number in the normal copy mode. At the same time, the display on the magnification display 114b disappears. Then, by operating the ten-key pad 112d on the number display 112e, a numerical code of "01 to 13" can be entered. Numerical codes “01 to 13” indicate adjustment items in the adjustment modes shown in the table below.

Table Code Item 01 Exposure voltage 02 Charging voltage 03 Development bias voltage 04 Transfer voltage 05 Separation voltage 06 Image leading edge adjustment (paper feeding cassette 66) 07 Image leading edge adjustment (paper feeding cassette 74) 08 inch / AB 09 10 Bin sorter presence 10 A3 Paper counter 2 up / down 11 ADF presence / absence 12 Paper-less mode 13 Cassette switching at automatic recovery In the table, the numeric codes “01 to 05” are as described above.
The exposure light source 28 included in the driving device 130, the charging corotron 48, the developing device 54, and the developing device 54 by the MPU 116 via the / A converter 124.
This is an item for setting the voltage of the transfer corotron 62 and the separation corotron 64.

Numerical codes “06” and “07” are the paper cassette
This is an item for adjusting the leading edge of the image when the paper 44 is fed from 66 and 74, that is, the paper passage timing (time data of the registration clutch on timer).

The numerical code "01 to 0" displayed on the number display 112e.
The standard value of the item corresponding to 7 "is displayed as" 0 "on the magnification display 114b. That is, when the adjustment mode is entered, the display on the number display 112e and the magnification display 114b is shown in FIG. Switch to (B), but use the numeric keypad 112d to set the numeric code "01" to set the exposure voltage, for example.
Enter, the number display 112e and magnification display 114b
Is displayed as shown in FIG. 9 (D). That is, when the numerical value “0” is input from the state shown in FIG. 9 (B), “0” is displayed in one digit on the number display 112e, and the segment of ten digits is displayed in the ninth digit. It is the same as the state shown in FIG.
Then, when you enter the numerical value "1", the "0" in the first digit moves to the tenth digit, "1" is displayed in the first digit, and "0" is displayed in the magnification display 114b. To be done. At this time, MPU116
Reads the standard exposure voltage value stored in the ROM 118 together with the control program and sets the exposure voltage in the adjustment data table provided in the RAM 120.

For example, the operating value such as the exposure voltage is displayed with the two zoom keys.
It is set by the operation of 114a. For example, in normal copy mode, the zoom key on the side operated during reduction
When 114a is operated once, the magnification display 114b displays
It becomes "-1" as shown in FIG. Then ROM1
By subtracting “1” from the standard value of the exposure voltage read from 18, the new exposure voltage is set in the adjustment data table provided in the RAM 120.

When changing the adjustment item, the numeric keypad 112d is operated to change the numerical value displayed on the number display 112e.

If the clear / stop key 112b is operated in the state of FIGS. 9 (C) to 9 (E), the display contents of the number display 112e and the magnification display 114b are changed to the states of FIG. 9 (B). Return.

In the table, numerical codes “08 to 13” are items set by the dip switch or the like in the above-mentioned electronic copying machine of the prior art. For items corresponding to the numeric codes “08 to 13”, after inputting the numeric codes and designating the desired items, the display of the magnification display 114b is set to “0” or “1”. For example, to set the presence / absence of the ADF (automatic document feeder 16), set the number display 112e to display the numerical code “11”, and then select the side to be operated for enlargement in the copy mode. Operate the zoom key 114a to "1"
Is set on the magnification display 112a. Since "0" is already displayed when the mode is switched to the adjustment mode, "0" can be set by leaving it as it is.

Next, referring to FIGS. 4 and 5, FIG. 1A and FIG.
The operation or operation of the adjustment mode will be described based on the flowchart shown in FIG. 1B.

Service switch 15 (Fig. 2) when in adjustment mode
After turning on, the main switch 13 (Fig. 2) is turned on. Then, the electronic copying machine 10 is put into the service mode, and the displays of the number display 112e and the magnification display 114b are as shown in FIG. 9 (A). After that, the ten key 112d is operated to input "99", and then the start key 112a is operated. Then, the electronic copying machine 10 is switched from the service mode to the adjustment mode, and the display of the number display 112e and the magnification display 114b is switched as shown in FIG. 9 (B). The numeric keypad operated when switching from the service mode to the adjustment mode was explained as "99".
This numerical value may be another predetermined numerical value.

In the first step S301 of FIG. 1A, the MPU 116 makes the RAM 1
The digit counter provided in the predetermined area of 20 is reset to zero. This digit number counter is for storing the number of digits of the numerical code displayed on the number display 112e in the adjustment mode. After setting the digit number counter, the MPU 116 sets the zoom key prohibition flag in the flag area of the RAM 120. When the zoom key prohibition flag is set, acceptance of the zoom key 114a operated to enlarge or reduce the copy magnification is prohibited in step S201 of the interrupt routine. After that, the MPU 116 displays the number display 112e and the magnification display 114b as shown in FIG. 9 (B), and proceeds to the next step S303.

In step S303, it is determined whether or not the ten-key 112d is operated, and if the operation of the ten-key 112d is not confirmed, the process proceeds to step S305. In step S305, it is further determined whether or not the clear / stop key 112b is operated. If the operation of the clear / stop key 112b is not confirmed, the process returns to the previous step S303, and if the operation is confirmed, the next step Proceed to S307.

In step S307, it is determined whether the digit counter reset in the first step S301 is zero. If it is not zero, the process returns to the first step S301 and the digit counter is reset again. If the reset of the digit number counter is confirmed, that is, if the number display 112e is displayed as shown in FIG. 9 (B), the adjustment mode is in effect, and the process advances to the next step S309.

In step S309, the display of the number display 112e is returned to "1" after a predetermined time, the zoom key prohibition flag reset in the first step S301 is reset, and the enlargement / reduction magnification can be displayed on the magnification display 114b. To
After that, the process returns to the service mode when the main switch 13 is turned on after the service switch 15 is turned on, and the display states of the number display 112e and the magnification display 114b are as shown in FIG. 9 (A). Become.

When the operation of the ten-key pad 112d is confirmed in the previous step S303, the process proceeds to step S311 without proceeding to step S305.

In step S311, whether or not "1" is set in the digit number counter, that is, the number display 112e displays, for example, the 9th digit.
It is determined whether or not there is a display of one digit as shown in FIG. If "1" is not set in the digit counter, that is, if the number display 112e is as shown in FIG. 9 (B),
Proceed to step S313.

In step S313, it is determined whether or not the operated numeric keypad 112d is the "1" key for entering the tens digit, that is, whether it is the "1" for setting the numerical code "10 to 13". . If the input of "1" is confirmed, the process proceeds to step S315. In step S315, "1" is displayed on the number display 112e, and "1" is set in the digit number counter reset in the first step S301.

If it is determined in the previous step S313 that the operated key is not for ten digits, that is, for the one-digit numerical code "01 to 09", the process returns to the previous step S303.

If it is confirmed in the previous step S311 that "1" is set in the digit number counter, the process proceeds to step S317.
In step S317, it is determined whether or not the display of the first digit of the number display 112e is "0". And the display is "0"
If it is determined that, the process proceeds to step S319. Step S319
Then, it is determined whether or not the operated ten-key pad 112d is for inputting "0". If it is determined to be “0”, it means that the numeric keypad 112d is erroneously operated, and the process returns to step S303. If it is determined that the operated numeric keypad 112d is not for inputting "0", that is, for inputting the numerical values "1 to 9", step S3
Proceed to 23.

If it is determined in step S317 that the display on the number display 112e is not "0", that is, if it is "1", the process proceeds to step S321. In step S321, it is determined whether the operated numeric keypad 112d is for inputting a numerical value of "3" or less. That is, in this electronic copying machine 10, since there are 13 adjustable items,
Even if a value greater than "14" is entered, that value is meaningless. Therefore, if it is determined in step S321 that any of the ten-key pad "4-9" for inputting a numerical value of "14" or more has been operated, the previous step S303 is performed.
Return to.

In step S321, the operated numeric keypad 112d is "3".
It is for inputting the following numerical values, that is, one digit "0 to 0" for setting the numerical code "10 to 13".
If it is determined to be 3 ", the process proceeds to step S323.

In step S323, “0” is displayed in the first digit of the number display 112e, that is, in step S323 via step S319.
If the value reaches 0, the "0" is shifted from the state shown in FIG. 9 (C) to ten digits as shown in FIG. 9 (D). If step S323 is reached via step S321, "1" is displayed in the tens digit by shifting. Then, the digit number counter for which "1" has been set in step S315 is reset to "2". Then, based on the display contents of the number display 112e, that is, based on the numerical codes “01 to 13” as shown in the table, the RAM 120
Read the corresponding data from the adjustment data table of
The standard operation value is displayed as "0" on the magnification display 114b. Then, after resetting the zoom prohibition flag set in the first step S301, the process proceeds to step S325.

In step S325, it is determined whether the start key 112a has been operated. The operation of the start key 112a determined in step S325 is for performing a copy operation, and therefore, the operation of the start key 112a that is operated when the adjustment mode is first entered from the service mode is not viewed. Absent. When the operation of the start key 112a is confirmed in step S3225, the process proceeds to step S327, and in step S327, the copy operation is executed according to the main routine shown in FIGS. 7A and 7B.

If the operation of the start key 112a is not confirmed in step S325, the process proceeds to step S329. In step S329, it is determined whether the clear / stop key 112b has been operated. If the operation of the clear / stop key 112b is confirmed, the process returns to the first step S301. If the operation of the clear / stop key 112b is not confirmed in step S329, the process proceeds to step S331. In step S331, it is further determined whether the ten key 112d has been operated.
If the operation of the ten-key pad 112d is confirmed, the process returns to step S303, and if not, the process returns to step S325.

As described above, in the above-described embodiment, the numerical codes “01 to 13”
When setting the adjustment item corresponding to, the standard operation value of the adjustment item to be set when the desired number is displayed on the number display 112e is displayed as "0" on the magnification display 114b. Therefore, the standard operating value displayed as "0" can be set using the zoom key 114a, for example.
Since it is only necessary to input the value to be added or subtracted by, it is not necessary to remember the standard operation value for each adjustment item. Therefore, the setting of the operation value of each adjustment item becomes extremely easy.

[Brief description of drawings]

FIG. 1A and FIG. 1B are flowcharts for explaining the operation or operation of the electronic copying machine in the adjustment mode. FIG. 2 is an overall external view showing an example of an electronic copying machine as an embodiment of the present invention. FIG. 3 is a schematic sectional view for explaining the internal structure of the embodiment shown in FIG. FIG. 4 is an illustrative view showing an enlarged operation panel of the copying machine main body. FIG. 5 is a block diagram showing the structure of the electronic copying machine. FIG. 6 is a circuit diagram showing an example of the backup circuit. FIG. 7A and FIG. 7B are flow charts for explaining the operation of this embodiment. FIG. 8 is a flow chart for explaining the interrupt routine of this embodiment. FIG. 9 is an illustrative view showing one example of display on the number display and the magnification display in the adjustment mode. In the figure, 13 is a main switch, 15 is a service switch, 28 is an exposure light source, 38 is a photosensitive drum, 110 is an operation panel, 112a is a start key, 112d is a numeric keypad, 112e is a number display, 114a is a zoom key, 114b is a magnification. Indicator, 116 is M
PU, 118 is ROM, 120 is RAM, 130 is a driving device, 136 is a backup circuit, and 146 is a backup battery.

Continuation of front page (56) Reference JP 62-58274 (JP, A) JP 59-189362 (JP, A) JP 60-165872 (JP, A) JP 62-91931 (JP , A) JP-A-61-140956 (JP, A) JP-A-62-90670 (JP, A)

Claims (1)

[Claims] 1. An image forming unit, a setting mode for setting an operation value of an image forming process of the image forming unit, and an execution for executing a process based on an operation value set in the setting mode. Mode switching means for switching between modes, first storage means for storing standard operating values of the process of the image forming means, first storage means when the setting mode is switched to First display means for displaying the standard operation value stored as zero as zero, first input means for inputting a process operation value with reference to zero in the setting mode, Second storage means for storing the operation value input by the first input means as a set operation value with the standard operation value as a reference, among the plurality of processes in the setting mode Second display means for displaying a setting item desired to be set, second input means for inputting a numerical value corresponding to the setting item when the setting item is selected, and the second The setting item is confirmed by inputting a predetermined number of times by the input means, the confirmed setting item is displayed on the second display device, and the setting operation value based on the standard operation value is set to the first operation value. An electronic copying machine, characterized in that the display means is provided with a confirming means for displaying each.