JPS58152278A - Copying device - Google Patents

Abstract

PURPOSE:To prolong the life of a photoreceptor, by detecting the degree of contamination of the photoreceptor when the operation of a titled device is interrupted on account of jamming or the like, operating the intensity of the light necessary for destaticization in accordance with the results of the detection, and destaticizing the photoreceptor by means of the lamps selected by the same. CONSTITUTION:A means for detecting abnormal start modes, a means for recognizing contamination and a microcomputer 41 provided also with functions as means for operating the intensity of light and controlling destaticization are provided in a copying machine which destaticizes a photoreceptor by irradiation of light. When the means for detecting abnormal start modes detects the stoppage on account of jamming, etc. in the event of the interruption in the operation of the machine, the respective blocks L1-L4 of erasing lamps 12 are all lighted while the photoreceptor 8 is kept idled; at the same time, a destaticizing lamp 27 is controlled to light at about 5-10W. The light reflected from the photoreceptor 8 is detected with a photodetector 23, whereby the degree of the contamination is detected. In accordance with the results thereof, the lamp outputs necessary for cleaning the photoreceptor are operated and if necessary, the lamp for exposure is used for desaticization.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying apparatus, and more particularly to a copying apparatus designed to extend the life of a photoreceptor by improving static elimination control during a cleaning process.

In a copying machine, original information is exposed to light on a charged photoreceptor (photoconductor) to form a latent image, and in a developing section, toner is attracted and adhered to the potential-bearing latent image area using Coulomb force. After the image is visualized, the image is transferred to copy paper, and the toner on the copy paper is further melted and fixed using heat or pressure to complete the copy.

On the other hand, after the transfer is completed, the photoreceptor is cleaned of remaining toner by a fur brush or plaid in the cleaning section, and the remaining potential is brought to zero by a static eliminating corona and a static eliminating lamp, and then a new copy is made. Prepare for the cycle.

By the way, this cleaning process is a cycle that is always performed after the image forming (placing an image on the photoreceptor) and transfer steps, and is charged during the first rotation of the photoreceptor.

After each cycle of exposure, development, and transfer, cleaning is performed in the second rotation, and after copying is completed, the photoreceptor is
There is a method in which the cleaning is completed by rotating the device three times.

If this cleaning is incomplete, toner and potential remain, resulting in the image and background becoming dirty during the next copy, resulting in a dirty copy.

Therefore, in order to perform thorough cleaning, it is possible to strongly contact the surface of the photoconductor with Far Plan or Plaid, or to increase the output of the static elimination lamp and the static elimination corona. This may cause scratches on the photoconductor, and the photoconductor may become fatigued, shortening its lifespan.

Therefore, taking these points into consideration, the contact pressure of Farplan, N and Plaid and the output of the static elimination lamp and static elimination roller 6 must be kept at appropriate values.

However, in conventional copying machines, the photoconductor stops with the image being visualized due to a jam occurring during the copy cycle, for example, before the transfer process, or the power switch is turned off. Then, light with an intensity of about four times the static elimination light required for normal cleaning after transfer is constantly irradiated in each copy cycle.

Unfortunately, there was a problem in that the photoreceptor fatigued and deteriorated more quickly.

This invention has been made to solve the above-mentioned problem, and when the above-mentioned copying apparatus is turned on and the machine is stopped in the middle of the copying process due to a jam or abnormal operation, It detects the degree of dirt on the photoconductor, calculates the light intensity necessary for static elimination based on the detection result, and uses the erase lamp and static elimination lamp conventionally equipped in copying machines, or the exposure lamp, depending on the calculation result. A copying apparatus is provided in which one of the lamps is selected and the selected lamp is used as a lamp for initial static elimination, and the lighting is controlled while rotating the photoreceptor before the copying process, thereby ensuring that the photoreceptor is always properly lit. The purpose of this is to extend the life of the photoreceptor by providing a strong charge-eliminating light, and to ensure complete leaning in any case.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a copying apparatus of a static exposure type using a belt-like photoreceptor, in which the present invention is implemented.

In the garden map, a halogen lamp for exposure 1. Fiber lens for exposure using a condensing light transmitter 2. Double type scorotron charger for charging 6, high voltage power supply for charging 4. A linear light sensor 5 for detecting the pattern of the original is integrally mounted on the carriage B.

Then, by pressing a print key (not shown), the halogen lamp 1 is turned on, a high voltage of about -5.6 KVQ is applied by the scorotron charger B, and the carriage 6 is moved in the scanning direction shown by the arrow A by the scanning device 7. Upon scanning, a belt photoreceptor 8 made of an organic optical semiconductor (OPC) having two segments and capable of forming two electrostatic latent images is charged and exposed.

This exposure is a slit exposure, in which the light from the halogen lamp 1 reflected by the original 10 on the contact glass 9 is irradiated onto the charged belt photoreceptor 8 through the fiber lens 2 in the form of a thin strip, and the image of the original 10 is An electrostatic latent image corresponding to the image is formed on the belt photoreceptor 8.

At the same time, the original 10 is scanned by the linear optical sensor 5 and its pattern is detected.

When charging and exposure are completed, the application of high voltage to the scorotron charger 6 is stopped, and the 10-gen lamp 1 is turned off.
is turned off, and the carriage 6 returns to the home position at twice the speed of the forward movement by the action of the return clutch.

On the other hand, the belt photoreceptor 8 rotates in the direction of arrow B, and first, the erase lamp 12 erases charges unnecessary for copying according to the size of the original 10 or the transfer paper.

Thereby, toner is prevented from adhering to unnecessary areas of the belt photoreceptor 8, and fatigue of the belt photoreceptor 8 is maintained at a constant level.

Thereafter, toner 14 is applied by the developing roller 16, and the electrostatic latent image on the belt photoreceptor 8 is visualized.

On the other hand, the upper paper feed cassette 15 or the lower paper feed cassette 16
Transfer (copy) paper inside is fed by paper feed rollers 17 or 18, contacts belt photoreceptor 8 at precise timing by registration rollers 19, and the toner image on belt photoreceptor 8 is transferred to the transfer paper. .

At this time, a high voltage of about -6 KV is applied to the transfer charger 20 at a precise timing to attract the toner image on the belt photoreceptor 8 toward the transfer paper, and the separation charger 20
The function is to remove static electricity from the transfer paper so that the transfer paper can be easily separated from the belt photoreceptor 8 by applying a 4.5K VOAC high voltage, which will be described later, and to remove the electric charge from the belt photoreceptor 8 when there is no transfer paper. fulfill.

The transfer paper separated at the corner of the belt photoreceptor 8 (separated by curvature) has a toner image fixed thereon by a heating roller 22, which is a fixing device.

Thereafter, the transfer paper is stocked in a double-sided buffer tray 25 by a guide plate 24 when the front side copy of double-sided copying is finished, and is stocked in the paper discharge stocker 26 by the guide plate 24 when the single-sided copying or the back side copy of double-sided copying is finished.

Furthermore, the segments of the belt photoreceptor 8 that have undergone the two-transfer separation are further irradiated with light from the static elimination lamp 27 to remove residual charges.
The electric potential is erased, residual toner is removed by the cleaner fur brush 28, and the copying process is prepared for the next copying process.

Furthermore, when a predetermined number of copy cycles have been executed, the clamp lamp 12. A cycle is executed in which the static elimination lamp 27 is completely turned on and the belt photoreceptor 8 is rotated several times to remove residual charges and image memory on the belt photoreceptor 8 and clean the surface thereof.

The top of this copying apparatus is opened as shown by the phantom line to allow the user to replace the belt photoreceptor 8 which has become a magazine.

In the figure, 11 is a surface electrometer, 26 is a belt photoreceptor 8
These surface electrometers 11 are light receivers for detecting dirt.
and the light receiver 23 will be described later. To Sarah, 30
3 is a fan motor, 31 is a paper feed roller for the double-sided buffer tray 25, 32 is a drive motor, and 66 is an electrical unit.

FIGS. 2 and 3 are block circuit diagrams of the control section of this copying apparatus.

In both figures, this copying apparatus is controlled by two microcomputers (hereinafter abbreviated as "microcomputers") 41 and 42.

The microcomputer 41 is a master microcomputer, and is in charge of 7-can control of the copying process, output control of various high-voltage power supplies and developing bias power supplies, various dimming controls, time measurement, voice notification, and other controls.

The microcomputer 41 also functions as an abnormal start mode detection means, a dirt recognition means, a light intensity calculation means, and a static elimination control means, as will be described later.

The microcomputer 42 is a slave microcomputer 68) that controls display control, manual key control, voice recognition control, and drive control of the pulse motor that drives the optical scanning system.

These microcomputers 41 and 42 are each 8-bit one-chip microcomputers, including a CPU' (central processing unit), 4 bytes of program memory (including ROM and 128 bytes of data memory (RAM)), and 3 8-bit one-chip microcomputers. Bit parallel I10 ports (ports Po, Pl, P2),
Two 16-bit counters 731 (To terminal, Tl terminal) and two interrupt terminals INTo.

When using a 12 Mtlz crystal with a NT+, the execution time is 1 μse per instruction.
It is c.

The microcomputers 41 and 42 serially transfer data via open collector inverter buffers 46 to 46 by an asynchronous receiver/transformer (hereinafter referred to as rUARTJ).

Note that the microcomputers 41 and 42 do not need to be mounted on the same printed circuit board within the machine, and the microcomputer 42, which mainly controls the human operating system, may be mounted on the printed circuit board of the machine operating section. .

Here, the functions of the UART of the microcontrollers 41 and 42 will be briefly explained. The internal register of the UART is the fourth
As shown in the figure, a transmission buffer 401. Receive buffer 40
2. Hippo sofa 403. It is comprised of a control word register 404, has all the functions necessary for data communication, and interfaces with modems and terminal equipment.

The transmission buffer 401 converts the parallel data sent from the accumulator via the data bus buffer into 7 real data consisting of the required number of characters and pits, and sends it out from the TxD terminal in accordance with the control signal.

Further, the reception buffer 402 converts serial data sent from the RxD terminal via the input buffer 403 into parallel data, and converts it into parallel data.
The bits and characters are checked according to the communication format specified in the mode set by the initial setting of 04, and the assembled characters are sent to the accumulator.

Incidentally, FIG. 5 shows the transmission data format in this system. In the figure, the first stage is address data, and the second stage is information data. In this way, 256 pieces of data can be sent to 256 terminals.

In this way, the microcontrollers 41 and 42 are connected to the UART Rx
When 7 real data is input to the D terminal, an internal interrupt is generated, and the input data is read by jumping to a specific register. Data communication is performed according to the protocol between multiprocessors and information is exchanged. .

Referring to FIG. 2, a Schmitt trigger inverter 50 and a 0MO8 inverter 5 are connected to the To terminal of the microcomputer 41.
A timing pulse from an encoder 52 is inputted via 1.

The encoder 52 is constructed by disposing a light emitting diode 54 and a phototransistor 55 facing each other, sandwiching a slit disk 53 that rotates in synchronization with the rotation of the belt photoreceptor 8.

The timing pulses input to the To terminal of the microcomputer 41 are counted by an event counter, and the microcomputer 41 performs sequence control of the copying process based on the count value.

This color/reflector is capable of counting up to 64,000 pulses, and counts by hardware regardless of program execution.

By counting timing pulses with the event counter in this way, the problem that occurs when timing pulses are input to the interrupt terminal and counted by software is that an interrupt occurs every time a timing pulse is input. For example, the pulse period is 50 μs
With ec, an interrupt occurs every 50 μsec, which can solve the problem of delayed program execution time and malfunction.

A signal is sent to the Tl terminal of the microcomputer 41 via an inverter 60 and a Schmitt trigger inverter 61 by detecting the start position mark 56 on the belt photoreceptor 8 with a reflective photoelectric sensor 59 consisting of a light emitting diode 57 and a phototransistor 58. The resulting timing star radius ζ is input.

74 controller 411d starts sequence control when this timing start/ZJ reply is input.

The two-channel timer/event counter in the microcomputer 41 is configured as shown in Figure 6, with the Tl terminal representative, and is capable of counting external events and generating accurate time delays. It has a built-in counter 410. Both modes of counter operation are the same PI, only the input source of counter 410 is different.

Counter 410 is a 16-bit binary up counter and is presettable. MOVA, T (
Contents can be exchanged with the accumulator using the read timer counter) and MOVT, A (load timer counter) instructions. The contents of counter 410 are not affected by reset and are independently initialized by the MOVT, A command.

The counter 410 starts counting as a timer with a 5TRT T (start timer) command and as an event counter with a 5TRT CNT (start counter) command. Once started, counter 410 continues counting until stopped by a 5TOP TCNT (stop counter) command or by reset. Maximum curran) (FFFF) Increments by t and overflows by zero.

By incrementing the maximum count to zero (overflow), the overflow flip-flop 41
It is set to 1 and an interrupt request is generated. The overflow flag can be tested with the conditional jump instruction JTF,
Reset by JTF command or reset. The interrupt request is stored in a latch and then external interrupt input I NT .

Or it is ORed with lNTl.

Enable or disable timer interrupts separately from external interrupts.
TCNTI (timer counter interrupt enable), DISTCN
This is done by the TI (timer counter interrupt disable) instruction.

If a counter overflow occurs when timer interrupts are enabled, a subroutine call is made to a specific address where the timer/counter service routine is stored.

If a timer interrupt and an external interrupt occur at the same time, the latter will be recognized and a specific address will be called. After being latched, the timer interrupt remains undefined until the external device is serviced, and is recognized immediately upon return from the service routine. An undetermined timer interrupt is reset by calling a subroutine at a specific address or cleared by executing the DIS TCNTI instruction.

Next, the event counter operation and timer operation of this timer/event Φ counter will be explained.

(1) Event counter operation 5TRT By executing the CNT (start counter) instruction, the T1 terminal is connected to the counter input via the edge detection circuit 412, and the counter 410
It acts as a counter and starts counting. As a result, the change from high to low in the TI manual PT becomes a count signal, and the counter 410 is incremented (+1).

The maximum increment speed of counter 410 is 1 count/3 machine cycles (1 count/1 μS when using a 12 MHz crystal), and there is no minimum limit. T1 power must be high for at least 250ns (at 12MHz) after each change.

(2) Timer operation By executing the 5TRT T (start timer) command, the internal clock and counter input are connected, and the counter 410 functions as a timer and starts counting. Prescaler (divider) 416 that divides machine cycle clock ALE (crystal oscillation frequency) by 12
An internal clock is generated by passing it through. This grease scaler 416 is reset while the 5TRTT instruction is being executed.

Therefore, in the case of a 12 MHz crystal, the counter is incremented (+1) every 1 μs using the I MHz clock.
)do. Delays from 1 μs to 64 m5 (counting to 64) are obtained by presetting counter 410 and detecting overflow. A time greater than 64 m5 can be obtained by counting overflows in a register under software control.

It should be noted that this 16-pin counter 410 can perform timer operations independently for each of the 8 pins.

An external clock can also be applied to the Tl input to operate counter 410 in event counter mode for sub-1 μs time resolution. ALE divided by 3 or more is suitable as this external clock.

Fine tuning of very small or larger delays can be easily done with the software 0 delay loop.

Returning to FIG. 2, the zero-cross pulse of the AC power supply voltage is input to the microcomputer 410 interrupt terminal INTo.

That is, an AC voltage of 1Ov obtained by stepping down the AC power supply voltage by a transformer (not shown) is full-wave rectified by a full-wave rectifier 62 and applied to the light-emitting diode 63 . Then, the light-emitting diode 66 is turned off near the AC zero-crossing point, and turned on to emit light at other times, so the phototransistor 64, which together with the light-emitting diode 63 constitutes a photocoupler, is turned off every time near the AC zero-crossing point.

As a result, the input side of the inverter 65 becomes a high level 2H'' at every zero-crossing point, and the output side of the Schvitt trigger inverter 66 becomes a high level 2H'/at every zero-crossing point of the alternating current. This zero-cross pulse is input to the interrupt terminal INTo.

The edge of this interrupt from the microcomputer 41 can be detected by setting a flag in the register, using a falling pulse.

Therefore, the microcomputer 41 detects the edge of the zero-cross pulse, starts an internal counter, and controls the power phase of the halogen lamp 1, the static elimination lamp 27, etc. based on the result. In addition, the halogen lamp 1 and the static elimination lamp 27
The power phase control will be described later.

The signals input to the port P1 via the inverter group 67 are input to the interrupt terminal lNTl of the microcomputer 41 via the open collector inverter group 68, respectively.

This adds sorter 1 to the copying machine. Collator, automatic document feeder (ADF), charge counter, document reader (OC)
This is because when external devices such as R) are attached, the interface with these external devices is connected to the UART of the microcomputer 41 using a digit chain method.

That is, when the external device outputs an acknowledge signal requesting permission to use the line to the port PI of the microcomputer 41, an interrupt is generated at the interrupt terminal INT t of the microcomputer 41, and the microcomputer 41 polls the port P1 to receive information from any external device. Determine whether permission to use the line has been requested.

Then, when the microcomputer 41 permits the use of the line, the UA
An address code is sent from RT and data transfer is performed.

In this embodiment, an acknowledge signal is input from ports Pi and P2 of the microcomputer 42 to the port Pi of the microcomputer 41, and when the microcomputer 41 permits the use of the line, data is transferred between the microcomputers 41 and 42, that is, the microcomputer 4
Data of key human power information is sent from 2, and sequence status is sent from microcomputer 41.

The commands of the pulse motor and each data of display information are transferred.

A voice synthesis chip 70 controlled by a control signal from the microcomputer 41 is connected to port P2 of the microcomputer 41.

This speech synthesis chip 70 has an internal speech memory of 32 pits and is capable of 26 seconds of speech, but this alone is insufficient for guidance, so an external speech memory of 32 pits is provided.
Connect bit subee + ROM71 to 8, 100
sec speech is possible.

This voice synthesis chip 70 reads operation commands from the microcomputer 41 via a bidirectional path line, reads data from the internal speech memory or speech ROM 71, synthesizes the voice necessary for information transmission, and synthesizes the voice necessary for information transmission. The synthesized speech is output to a speaker 74 via a filter 72 and an amplifier 73.

Then, each time one phrase of audio is output, the terminal lN
(from the TR to the port of the microcomputer 41 via the inverter 75)
A completion signal is output to P2.

This voice synthesis function is provided to increase the operating efficiency of the machine by having the user perform machine maintenance as much as possible, or to notify the user of a serviceman call if maintenance cannot be done by the user. It has become.

In the case of a service encore, if the failure is such that the service engineer can repair it on the spot, when the service engineer presses the fault diagnosis guide key inside the machine, instructions on how to repair it and which parts to replace will be announced. . In this case, the service person is instructed to perform the repair while referring to specialized terminology or a service manual.

Furthermore, if the details of the failure are unknown and on-site repair is impossible, the service engineer is instructed to analyze the memory card, which will be described later.

Note that the speech synthesis chip 70. It is also possible to use a CMOS element as the speech ROM 71 and back it up with a battery to enable notification in the event of a power outage.

The microcomputer 41 receives a detection signal from a linear optical sensor 5' consisting of a fiber lens 76 and a photodiode array 77 for detecting the image density and size of the original 10, and a belt of light that is contrasted by an erase lamp 12, which will be described later. An A/D converter 78 is connected to which a detection signal from a light receiver 23 consisting of a photodiode array that receives reflected light from the photoreceptor 8 is input in parallel.

The microcomputer 41 controls the A/D converter 78 to execute A/D conversion of the parallel input, and determines the image density and size of the original 10 and the belt exposure based on the conversion result input from the A/D converter 78. The degree of contamination of the belt photoreceptor 8 (the smaller the A/D conversion value is, the more the belt photoreceptor 8 is contaminated with toner, etc.) is recognized.

Then, based on this recognition result, dimming and output control of various high-voltage power supplies and developing bias power supplies are performed, as well as calculation of the output of static elimination light and output control based on the calculation results.

In addition, in FIGS. 7 and 8, stains on the belt photoreceptor 8 and A
An example of the relationship between the A/D conversion data by the /D converter 78 and the relationship between the A/D conversion data and the lamp (static elimination light) output is shown.

In FIG. 7, a stain "1" indicates peta black, and a stain "0" indicates total reflection.

Further, the lamp output in FIG. 8 is the same as that of the halogen lamp 1. Erase lamp 12. and a static elimination lamp 27 in combination.

However, since the static elimination effect due to the lamp output varies significantly depending on the distance between the light source and the belt photoreceptor 8, it is necessary to determine the lamp output by converting it into the brightness (looks) on the belt photoreceptor 8.

The effective light receiving length of the light receiver 23 that receives reflected light from the belt photoreceptor 8 is approximately equal to the length of the erase lamp 12, which will be described later, and corresponds to the segment length of the belt photoreceptor 8. In addition to a diode array, a phototransistor array, a line CCD sensor, etc. can also be used.

The lighting control of the erase lamp 12 can be performed based on not only the size information of the document 10 described above but also the size information of the fed transfer paper.

When detecting the size of the transfer paper, for example, in FIG. 9, near the exits of the upper and lower paper feeders (7) 15 and 16, there is a reflection device consisting of a light-emitting element F and a light-receiving element G as shown in FIG. 10, respectively. A paper size detector 29 configured by arranging photo sensors PS at predetermined intervals is arranged.

For example, as shown in FIG. 11, when transfer paper of each size is fed in the illustrated direction relative to the reference surface R, each of the reflective photosensors PS of the paper size detector 29 is
Arrange them in the position shown.

In this way, if the outputs of the light receiving elements G of each sensor PS of P1 to P4 are all at a high level "H" due to the reflected light from the transfer paper, the paper size is A3 or A4, and the output of each sensor PS of P1 to P3 is If the output of the light-receiving element G is high level "H" and the deviation of Pa is lore bay L'/', then the paper size is B4 or B5, PI, P2 is high level XXH" and p3.
If P4's soreka low level "L", the paper size is A5
, Pl is 71 level ゝゝH〉, the paper size can be determined to be postcard size (A6).

And A3. A4 and B4. The determination of B5 can be made as follows.

In other words, the paper conveyance speed of the machine is 1OOftIn in linear velocity.
/see and the period of the timing pulse for time measurement is 10m5ec, the number of timing pulses generated while the A4 size transfer paper passes the paper size detector 29 is r210J, and the number of pulses of the timing pulse generated while the A4 size transfer paper passes the paper size detector 29 is r210J, and the number of pulses of the timing pulse generated while the A4 size transfer paper passes the paper size detector 29 is r210J. In the case of "180J," it is determined whether the size of the transfer paper is A3 or A4, B4 or B based on the detection result of the paper size detector 29 mentioned above and the counting result of this timing pulse.
It can be determined whether S.

By controlling the lighting of the erase lamp 12 according to the paper size detected in this manner, unnecessary charges on the belt photoreceptor 8 can be removed.

Furthermore, based on the paper size detection result, the scanning length of the optical scanning system can be appropriately controlled, thereby shortening charging and exposure times and saving energy.

Note that if the output of the paper size detector 29 does not change after a predetermined period of time, it can be determined that the transfer paper has jammed or slipped and cannot be fed.

Regarding A3 size transfer paper, by adjusting the relative distance between the paper size detector 29 described above and the registration paper sensor (not shown), the outputs of both sensors can be set to a high level "H" only when the paper is A3 size. Accordingly, it can be determined that the fed transfer paper is A3 size.

Returning to FIG. 2, the microcomputer 41 has internal ROM and R
Since the capacity of AM alone is insufficient, a halogen lamp 1.
Erase lamp 12. Static elimination corona 21° Static elimination lamp 27
．． A byte IO/ROM 80 and a memory card 81 are connected to 2, which also functions as an interface for the liquid crystal display 85.

The memory card 81 is, for example, two 2-byte CMOS RAMs 810 as shown in FIG.

811, a lower address latch circuit 812, and a constant voltage circuit 814 having a 3V battery cell 813 are configured onboard, and the microcomputer 41 etc. detects the machine usage status, cause of failure, and supply consumption status ( The number of copies per paper size, the total number of copies, etc.) are memorized one by one.

This memory card 81 is connected to the pass line and control line of the microcomputer 41 via the connector 81a, and whether or not the memory card 81 is connected is determined by the ground level card insertion signal CD.
The determination is made based on whether or not is input to the port Pl of the microcomputer 41.

Also, the voltage V of the battery cell 816 of the memory card 81
If bc falls below a certain level, the memory contents cannot be maintained, so as shown in Figure 2, the voltage Vbc is constantly monitored by a battery voltage detector 81b mounted on the circuit board of the machine to ensure that the voltage Vbc is below a certain level. Then, 10780M
Notification is made to the microcomputer 41 via 80.

When the microcomputer 41 recognizes that the voltage Vbc has become below a certain level, the microcomputer 41 controls the CMO8RAM810 of the memory card 81.
．． The stored data of 811 is saved to the buffer memory 82.

Note that when the battery cell 816 of the memory card 81 is replaced, the data saved in the buffer memory 82 is transferred to the memory card 81.

Further, the battery voltage detector 81b is constituted by, for example, a comparison IC incorporating a reference voltage generation source, external resistors RQ, Rp, Rs, and an inverter I, as shown in FIG. 13, for example.

Furthermore, the memory card 81 is used by a service person to log data collected at regular intervals to ensure machine reliability.

In addition to the above-mentioned contents, this memory card 81 also contains
Number of jams by paper size and calendar/clock I described later
Data from C, such as jams at 9 o'clock on the first day of the month, are also stored.

Returning to FIG. 2, the microcomputer 41 has a calendar/clock I backed up by a battery 86 that continuously measures time.
C84 is connected.

This calendar/clock IC 84 has a reference frequency of 32
．． 768KHz, 1.05MHz, 4.19MHz
Any one of the following can be selected arbitrarily, and the data for hour 1 minute 1 second, September 2, and day of the week are built-in, and the data format is input/output by the microcomputer 41.

The microcomputer 41 reads data from the calendar/clock IC 84 and displays a liquid crystal display in which the displayed characters can be displayed in reverse, for example, as shown in FIG. The data is displayed on the display 85, and the date and time are recorded on the copy.

In addition, when placing the liquid crystal display 85 in the corner of the contact glass 9 as shown in FIG. 15 to include the date and time on the copy, the liquid crystal display 85 can be used to display characters as shown in FIG. 16, for example. Configure the segment so that it appears normal.

It is also possible to display the date and time on the operation panel (not shown) of the copying machine, but it is preferable to enable selection by a switch whether or not to display the date and time, including in the case described above.

Furthermore, the data of the calendar/clock IC 84 is used as data on the date and time of occurrence of a jam, etc., which is stored in the memory card 81 as described above.

The microcomputer 41 receives a temperature detection signal from a temperature sensor (not shown) and an AC power supply of 1ooV (RMs) to AC5V (RMs).
S), a full-wave rectified signal that has been stepped down and full-wave rectified, a pressure plate open/close signal from a pressure plate open/close detection sensor that detects the open/closed state of the white pressure plate placed on the document 10, and a surface potential sensor 11 (
An A/D converter (conversion processing time of 50 to 100 microns) inputs the surface potential signal of the belt photoreceptor 8 from the microcomputer 41 (Fig.
sec high speed) 86 is connected.

The microcomputer 41 controls the power (heat generation) of the heater roller 22 shown in FIG. 1 based on the A/D conversion result of the fixing temperature detection signal, and controls the fluctuation value of the AC power supply based on the A/D conversion result of the full-wave rectification signal. The power supply of the halogen lamp 1 is regulated (dimming control) according to the result of the calculation.

Note that the regulation of this halogen lamp 1 will be described in detail later.

The microcomputer 41 also outputs a predetermined voltage when the pressure plate is not closed, based on the A/D conversion result of the pressure plate open/close signal from the pressure plate open/close sensor, which turns on and outputs a predetermined voltage only when the pressure plate is closed. A warning (audio or visual) is issued to prompt the operator to close the pressure plate.

This is done in the halogen lamp 1 as described below.
This is because if the pressure plate is open, the irradiated light from the halogen lamp 1 will leak outside through the contact glass 9, making it impossible to eliminate the static electricity.

In addition, in consideration of the case where the operator is far from the machine, a human body sensor such as an infrared sensor is installed on the machine, and only when this human body sensor detects that the operator is near the machine, the above-mentioned A warning may be issued to prompt the user to close the pressure plate.

Further, the microcomputer 41 outputs high-voltage power supplies for charging and transfer and development bias power supplies based on the A/D conversion result of the surface potential detection signal from the electrostatic field chopper type or surface acoustic wave type surface potential sensor 11. control.

At each processing stage of the copying process, a bright area surface potential VHA corresponding to the bright area (area where light is reflected a lot) of the original 10 on the belt photoreceptor 8 and a bright area surface potential VHA corresponding to the dark area (area where light is less reflected) of the original 10 on the belt photoreceptor 8 are determined. The dark surface potential VHB changes as shown in FIG. 17, for example.

In the same figure, the primary charge is the state charged by the Scorotron charger 3, and the static charge is removed by the erase rough 1129 minute P.
The state in which static electricity has been removed by the 11f charger 21 and the static elimination lamp 27, and the state in which the halogen lamp 1 is turned on and exposed are respectively meant.

By the way, what is needed as the final electrostatic latent image is the 15th
The bright area surface potential VHA and the dark area surface potential at point 0 in the figure are shown in FIG. 18, but as shown in FIG.
B', the desired contrast cannot be obtained.

Further, the residual potential of the belt photoreceptor 8 gradually increases without dropping to the initial potential ■, as shown in FIG. 19, when continuous copying is continued for a certain period or more. In addition, in the same figure, tc1 to tc
3 indicates one hour of continuous copying, and tst to tea indicate pause times, respectively.

Therefore, compensation control is performed so that the difference between the bright area surface potential VHA and the dark area surface potential VHB at the 0 point in FIG. 17 is constant. In addition to periodically sensing the surface potential during the copying process, the development bias value is controlled so that the difference between the surface potential and the residual potential remains constant. Control is performed to increase the output of the scorotron charger B or to increase the output of the Scorotron charger B.

Although it depends on the type of photoreceptor, the increased residual potential decreases after about a day or night and recovers to a value close to the initial value.
However, as the number of copies increases and the photoreceptor becomes fatigued, the residual potential no longer decreases,
It is no longer possible to obtain proper contrast.
Note that photoreceptor fatigue is related to the intensity and accumulation of light irradiation.
If a residual potential of 200 V or more remains with respect to a surface potential of 600 V, it can be said that the photoreceptor has reached the end of its life.

At this point, it is time to replace the photoreceptor, and at this point, the microcomputer 41 issues a display or audio notification urging the photoreceptor to be replaced.

Next, returning to FIG. 6, ports Pi and P of the microcomputer 42
2 via the display driver/controller 110.
7-segment displays 111 and 112 and switch matrix circuits 113 for various keys such as the number of copies and a print start key are connected, respectively.

The boat Po of the microcomputer 42 has a microphone 114.
A voice recognition unit 115 is connected to perform a spectrum analysis of the voice input through the voice recognition unit 115 and recognize whether it matches the already registered voice data. It also allows operations such as start and stop.

An example of the system configuration of this voice recognition unit 115 is shown in FIG. Note that in the figure, illustration of the nonvolatile RAM that stores registered audio data is omitted.

In the figure, the voice recognition chip VRC detects certain voiced and unvoiced sound parameters (Dx state sequence) in the input word or phrase, and compares this sequence with a pre-registered word storage sequence to recognize the input voice. The state sequence and recognition parameters are stored in a 1-chip ROM.

Returning to FIG. 3, a pulse motor drive circuit 117 for driving and controlling the pulse motor 116 for scan control of the carriage 6 shown in FIG. 1 is connected to the T1 terminal of the microcomputer 42.

Next, parts mainly related to the present invention will be explained.

In FIG. 2, the separate charger 21 is 10780M
80 and its I10 line 80a, and a strobe signal ST input through a buffer 94;
It is connected to a high-voltage power supply circuit 95 whose voltage value is determined by a control signal Sc directly inputted from the No. 10 line 80a, and for example, an AC 4.5 KV (RMS) force is applied thereto.

For example, as shown in FIG. 21, the static elimination lamp 27 is constructed by connecting a plurality of DC rod-shaped tungsten lamps 27a in series on a rectangular printed circuit board 27b, and has a total power of 5 to 1°W at 12V DC. This is the output.

As shown in FIG.
The lighting is controlled by the on-off switch circuit 96 (light amount control by PWM) in accordance with the pulse signal SR outputted through the I10 life 80a of the M80.

By the way, since the photoreceptors used in recent copying machines have high sensitivity, instead of using a tungsten lamp as the static elimination lamp 27 as described above, a light emitting diode (LED) is used instead.
) and electroluminescent elements (EL) are increasingly used.

Since these LEDs and ELs can select a single emission wavelength, efficient charge removal can be performed in accordance with the spectral sensitivity characteristics of the photoreceptor.

In other words, when the photoreceptor is made of selenium, its optimum sensitivity wavelength is around 500 nm, as shown in Figure 22@).
It is better to choose an LED or EL with emission characteristics of 500 nm (green).

In addition, when the photoreceptor is OPc, its optimum sensitivity wavelength is around 650 nm, as shown in 0:I) of the same figure, so 65
It is better to choose an LED or EL that has emission characteristics of 0 nm (orange color).

FIG. 26 shows an example of the configuration of the static eliminator 27 using LEDs.

In the figure, the static elimination lamp 27 is constructed by arranging a plurality of LEDs 27c having light emitting characteristics at the optimal sensitivity wavelength of the belt photoreceptor 8 in a row on a strip-shaped printed circuit board 27d having a light guide plate 27e. The belt is attached close to the photoreceptor 8.

The static elimination lamp 27 configured in this manner can also be controlled to be turned on by a switch circuit 93 as shown in FIG.

In FIG. 2, the halogen lamp 1 has an output of about 300 W, for example, and is controlled as follows when turned on for exposure.

First, every time the microcomputer 41 detects the falling edge of the zero-crossing pulse of the AC power input to its INTo, it switches the internal counter 41C (8 bits in Figure 6) connected to the T1 terminal to timer operation. Instead, count the internal clock.

In this way, as shown in FIG. 24, it is possible to measure the time from time τ0 when the zero-cross pulse is input.

Then, each time the count value, which is the time measurement value, matches the time data 81 to S10 as shown in FIG.
/D converter 86 is accessed to sample the AC5V full-wave rectified signal at each matching point.

Based on the actual measurement data during the AC half cycle sampled in this way, the microcomputer 41 calculates the AC fluctuation value.

Then, the microcomputer 41 determines that the halogen lamp 1 emits 9 lights according to the dimming value, based on the dimming value set by the dimming key switch on the operation unit and the above-mentioned alternating current fluctuation value (data half a cycle ago). For example, time data tl, t2, t3, etc. corresponding to the AC trigger point old, n2, n3, etc. shown in FIG. 25 are calculated.

Then, this time data is stored in the remaining 8 of the internal counter 410.
In addition to presetting the bit, the INT of the microcomputer 41
The zero cross pulse input to the O terminal switches the 8-bit color/reference to timer operation, and when the count value matches the preset data, the trigger point is recognized by an internal interrupt generated by the counter overflow, and the trigger point is recognized. When recognized, a solid stay drill (semiconductor relay in which a triac is energized by a photocoupler) 96 is energized.

By doing this, the phase of AC 100100V (R) applied to the halogen lamp 1 can be controlled to 100% duty as shown in FIG. The halogen lamp 1 can be dimmed by controlling the duty and phase.

When the halogen lamp 1 is turned on for static elimination, its effective output of 30 to 50 W is sufficient, so in this case, the halogen lamp 1 (300 W) is 1/10"k.
Phase is controlled by duty.

In this case, the time data preset in the internal counter 410 is calculated based on the rung output value (FIG. 8) calculated according to the degree of dirt on the belt photoreceptor 8 and the alternating current fluctuation value. .

FIG. 27 shows an example in which a fluorescent lamp is used as the exposure lamp, and the fluorescent lamp 105 whose rear side not facing the belt photoreceptor 8 is masked with a mask 105a is controlled to turn on at high frequency.

That is, an oscillation reference pulse of about 50 KHz is input from the microcomputer 97 to the inverter 101 via the inverter buffer 100, and the output of this inverter 101 (see FIG. 28(a)) is also input from the microcomputer 97 to the inverter buffer 102. A switching circuit 10 operated by a modulated pulse outputted through the! For example, as shown in FIG. 28(b), the modulated output is modulated by I, and a signal obtained by boosting the modulated output by a transformer 104 is input to a lighting circuit (not shown) of the fluorescent lamp 105 to control lighting.

In addition to the above-mentioned electronic method, the exposure lamp can be dimmed by providing a variable slit in the front of the halogen lamp 1 or fluorescent lamp 105, which lights up with a constant amount of light, and adjusting the slit width of the variable slit. There is also a mechanical method of adjustment.

For example, as shown in FIG. 29, the erase lamp 12 is constructed by arranging a plurality of LEDs 12b in rows on a rectangular printed circuit board 12a, each having a light emission characteristic of the optimal sensitivity wavelength of the belt photoreceptor 8. , the total output is about 2W.

Each of the LEDs 12b of the erase lamp 12 is divided into four blocks 1 to L4 as shown in FIG. 98 and 10/ROM 80 are selectively turned on by a lighting signal corresponding to the document size outputted from the microcomputer 41 via the I10 line 8C1b of the ROM 80, thereby removing unnecessary charges on the belt photoreceptor 8.

The array length of the LEDs 12b of each block Ll-L4 is as shown in FIG. 30, for example.
If the size is postcard size (A6), then FLOCK L2~
Each LED 12b of block L4 is lit, and if the size of the 1° document is A5, each LED 12b of blocks La and B4 is lit.

Also, if the size of the document 10 is B5 or B4, block L
If the size of the original 10 is A4 or A3, the LED 12 of each block is lit.
b is not lit either.

Furthermore, when this erase lamp 12 is used for detecting dirt on the belt photoreceptor 8 and for eliminating static electricity at the initial mark +)-, =:0f, all the LEDs 12b of each block 1 to L4 are lit. Ru.

In addition, if the total amount of light is insufficient just by arranging the LEDs 12b in one row, use the LEDs with the wiring configuration as described above.
12b may be provided in multiple rows.

Next, the outline of the control program executed by the microcomputers 41 and 42 mentioned above, including the portions related to the present invention, will be explained using a flow diagram.

First, in FIG. 31, the power switch of the 5TEPI copying machine is turned on. At this stage, power is supplied to the microcomputer 4i, A2-w, and other control units, but power is not yet supplied to each load of the machine.

5TEP2 Checking the condition inside the machine (copying device),
For example, checking whether the mechanical drive unit, cam, link, etc. are in the predetermined position (home position), checking whether copy paper remains in the conveyance system in the machine, and checking whether the heater roller 22 is powered. Check whether there is any danger or not, and check whether the supplies of toner, copy paper, etc. are out.

5TEP3 Based on the check result of 5TEP2, test whether the power relay can be turned on or not.
If you can't turn it on, use 5TEP4, if you can turn it on, use 5TE.
Proceed to P5 respectively.

5TEP 4 Diagnose the occurring fault and determine whether the fault can be repaired automatically. If automatic repair is not possible, control the speech synthesis chip 70 shown in FIG. 2 to notify the user of the fault. The corresponding maintenance method is announced by voice. However, if the failure is beyond the control of the user, a serviceman call is notified as described above, and the diagnostic data is stored in the memory card 81 shown in FIG. 2.

5TEP5 Turn on the power relay to supply power to each load of the machine, for example, the heater roller 22, etc.

5TEP6 Perform the same checks as ST'EP2 and continue monitoring the machine status.

5TEP7 Based on the 5TEP2 or 5TEP6GDf-x check result, position the mechanical drive unit that is not at the home position.

5TEP8 Static elimination control is performed according to the copy start state by each step of the initialization control routine to be described later.

5TEP9 Displays that copying is not possible, indicating that the temperature of the heater roller 22 has not reached a predetermined value.

5TEPIO Test whether the heater roller 22 has completed heating up, and if it has not heated up, 5TEP6
Return to 5TEPI in Figure 61 if you have a heat amplifier.
Proceed to I.

5TEPI I Perform checks similar to 5TEP2.6.

5TEP12 Since the heat-up has been completed and the copy is enabled (copy enabled), copy data can be entered, and the key switch matrix circuit 113 of the operation unit shown in FIG. 6 is scanned to test the data entry. Do the following.

5TEP13 Copy enable, copy entry data or basic mode data on display 1 shown in FIG.
11, 112 or other display devices (not shown).

In addition, the basic mode means the number of copies is "1".

Copy magnification "100%", upper paper feed cassette 15 selected, dimming blade "3" (for example, dimming blade "1" to "5")
”).

5TEP14 Diagnoses abnormality mode based on the check results of 5TEP11.

5TEP15 Perform a copy start test,
If the print start switch is not turned on, 5
Returning to TEPII, the processing of each step of 5TEP11 to 5TEP15 is repeated, and if the print start switch is turned on, the copying process from 5TEP16 onward is controlled.

5TEP16 Controls the scorotron charger 3 shown in FIG. 1 to perform corona discharge for charging.

Note that the output value of the scorotron charger 3 is, for example, 5
In a subroutine step (not shown) before TEP 16, a white standard pattern (not shown) provided at one corner of the contact glass 9 is projected onto the belt photoreceptor 8, and the surface potential of the projected portion is measured by the surface electrometer 11. and is determined based on the measurement results.

Further, the surface potential of the portion of the standard pattern on the belt photoreceptor 8 that is not projected is also measured by the surface potential meter 11, and the developing bias voltage is also determined based on the measurement result.

5TEP 17 Controls the lighting of the halogen lamp 1 in FIG. 1 as described above, and controls the pulse motor 116 (FIG. 6 and 9) that drives the carriage 6 to perform charging and exposure.

5TEP18 Feeds copy paper from the specified cassette and controls registration, and also controls the number of sheets fed by referring to set copy number data.

5TEP19 In accordance with the size of the original 10 recognized based on the detection signal output from the linear optical sensor 5 (FIG. 2) by scanning the carriage 6 in 5TEP17 or the size of the copy paper detected by the paper size detector 29. Charge removal from unnecessary portions on the belt photoreceptor 8 is carried out by lighting the erase lamp 12 according to the size of the original 10 or the copy paper as described above.

Next, referring to FIG. 33, 5TEP20 Developing bias voltage 2 Toner replenishment and control of the developing roller 13 are performed based on the sensor output of the toner concentration sensor (not shown).

5TEP21 Controls the output value and on/off of the transfer charger 2o shown in FIG.

5TEP22 Separate charger 2 in Figures 1 and 2
1 output control, the output is AC4.5KV
(RMS), and the static elimination lamp 22
The lighting control is performed so that the execution output becomes a value (approximately 5 to IOW) necessary for static elimination.

Note that since this step is a process during the normal cobycycle Az, the output of the static elimination lamp 22 is reduced to a required value that is smaller than the conventional one, as described above, to prevent unnecessary deterioration of the belt photoreceptor 8. .

5TEP23 Controls the fixing temperature of the heater roller 22 shown in FIG.

5TEP24 Driving and controlling the guide plate 24 shown in FIG. 1 to stock copies in the paper discharge stocker 26 when the single-sided copy mode or double-sided copying is completed, and to stock the copies on the double-sided buffer tray 25 when in the double-sided copy mode.

Furthermore, if a collating device is connected to the copying device, its sort mode, collate mode, etc. are controlled.

5TEP25 Check for jam occurrence inside the machine.

5TEP26 Performs the same check as 5TEP11, etc.

5TEP27 Perform diagnosis based on the check results of 5TEP25.26.

5TEP28 Count the number of copies and set the copy end flag only when the count value matches the set number of copies.

5TEP29 Check whether the copy end flag is set in 5TEP28. If the copy end flag is not set, return to 5TEP16 and repeat the above copy sequence again. If the copy end flag is set, return to 5TEP11, and then Each process from 5TEP11 to 5TEP15 is repeated until the print start switch is turned on.

Next, the initialization control routine shown in FIG. 31 will be explained with reference to FIGS. 64 and 65.

Note that the initialization control routine of 5TEP8 is a subroutine f7 that is always executed before entering the copy sequence 2 at the time of copy start.

5TEP80 Read the abnormality flag indicating the state from which the machine started from the memory card 81 or backup memory 82 in FIG. For example, if the machine stops due to a jam, this error flag will be set in response to the jam flag, or if the machine stops due to the power being turned off during the copy sequence (process),
For example, it is set in response to a flag indicating that the count value of timing pulses input to the TO terminal of the microcomputer 41 in FIG. 2 has not reached a predetermined value.

This abnormality flag is stored in a backed-up nonvolatile memory card 81 or buffer memory 82 so that it will not be erased even when the power is turned off.

5TEP81 Check the abnormality flag read in 5TEP80, and if the abnormality flag is not set, the normal start mode is in progress, so proceed to 5TEP82; if the abnormality flag is set, it is in the abnormal start mode, and proceed to 5TEP84.

5TEP82, 83 Since it was in the normal start mode, the belt photoconductor 8 was idle-linked for 2 to 3 rotations, and the static elimination lamp 27 was controlled to be lit at an output of about 5 to IOW to perform initial cleaning of the belt photoconductor 8. After that, the process returns to 5TEP9 in FIG. 61.

At this time, the separate charger 21 also outputs AC4,5K.
It may be operated at V (RMS) to compensate for the static elimination effect.

5TEP84-86 Since it is in the abnormal start mode, while rotating the belt photoreceptor 8, each block Ll-L4 of the erase lamp 12 is fully lit, and the static elimination lamp 27 is controlled to be lit at an output of about 5 to IOW. The static electricity removal cleaning and belt photoreceptor 8
The degree of contamination of the belt photoreceptor 8 is detected by detecting the reflected light from the photoreceptor 26 shown in FIG.

At this time, the separate charger 21 also outputs AC5.5K.
V (RMS) f operation may be used to compensate for the static elimination effect.

5TEP 87 Based on the A/D conversion result indicating the degree of dirt on the belt photoreceptor 8 detected by 5TEP 86, a data table corresponding to the diagram shown in FIG. 8 is looked up, and the belt photoreceptor 8 is cleaned. Calculate the static electricity removal light intensity (lamp output) required to do so.

Based on the calculation results of 5TEP88 5TEP87, 5
It is checked whether the static elimination light intensity in the static elimination cleaning process performed in TEP84 to TEP86 is sufficient, and if it is sufficient, the process returns to 5TEP9 in FIG. 61, and if it is insufficient, the process proceeds to 5TEP89 in FIG.

5TEP89 Since the static elimination light intensity is insufficient, use the halogen lamp 1 for exposure for static elimination.
The phase control angle (corresponding to the above-mentioned time data) is calculated based on the required static elimination light intensity calculated in 5TEP87.

5TEP 90 The carriage 6 in FIG. 1 is moved from the home position to a predetermined position and stopped so that the irradiation light from the halogen lamp 1 reaches the belt photoreceptor 8 via the white pressure plate and the fiber lens 2.

At this time, if the pressure plate is open, the irradiated light from the halogen lamp 1 will leak to the outside through the contact glass 9. Therefore, if the pressure plate is open, the open/closed state of the pressure plate is detected as described above. Then, the voice synthesis chip 70 is controlled to issue a voice notification to close the pressure plate, or a display prompting the user to do so is displayed on the display of the operation unit.

Note that the copying machine has a mechanism in which the irradiated light from the halogen lamp 1 reaches the photoconductor surface even when the carriage 6 is at the home position (copying device equipped with a drum-type photoconductor).
If so, this movement control is not necessary.

5TEP91~93 Halogen lamp 1 5TEP89
The lighting is controlled using the phase control angle calculated in , and the belt photoreceptor 8 is rotated in an idling manner to perform charge removal cleaning of the belt photoreceptor 8 while detecting the degree of dirt on the belt photoreceptor 8 similar to the 5TEP 86.

5TEP 94 Based on the dirt detection result at 5TEP 93, it is checked whether the initial cleaning is completed or not. If it is not completed, the process of 5TEP91 to 93 is repeated, and if it is completed, the process returns to 5TEP9 in FIG. 31. do.

In addition, in the above-mentioned 5TEP86.93, the dirt on the belt photoreceptor 8 is not only detected by light, but also the dirt can be detected indirectly by measuring the residual potential of the belt photoreceptor 8 with the surface electrometer 11 shown in FIG. It may also be possible to detect both detection results and use both detection results as criteria for checking.

In the initialization control routines shown in FIGS. 34 and 65, the erase lamp 12 and the static elimination lamp 27 are turned on at 5TEP84 to 86 to detect the degree of dirt on the belt photoreceptor 8 while cleaning. However, after detecting the degree of dirt on the belt photoreceptor 8, any two or one of the erase lamp 12, the static elimination lamp 27, or the halogen lamp 1 may be selected.

Incidentally, FIG. 36 shows an operation typing chart of each part of the copying apparatus in the above embodiment during two-sheet copying.

As described above, according to the present invention, unnecessary deterioration of the photoreceptor in a copying apparatus can be prevented, thereby extending the life of the photoreceptor and stabilizing copy quality.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a copying apparatus of a static exposure type using a belt photoreceptor according to the present invention. 2 and 6 are block circuit diagrams of the control section of the copying apparatus. 4 and 5 are block diagrams showing the structure of internal registers of the asynchronous receiver/transmitter of the microcomputer shown in FIGS. 2 and 3, and explanatory diagrams showing the transmission data formatter. FIG. 6 is a block diagram showing the configuration around the internal counter of the microphone computer shown in FIG. , is a partial diagram of the copying apparatus showing the arrangement row of paper size detectors 29. FIG. FIG. 10 is a schematic diagram of a reflective photocoupler used in the paper size detector 29, FIG. 11 is a diagram for explaining the detection principle of the paper size detector 29, and FIG. 12 is a diagram of the memory card shown in FIG. 16 is a circuit diagram showing an example of the battery voltage detector 81b in FIG. 2; FIG. 14 is an explanatory diagram showing the display surface of the display 85 in FIG. 2; FIGS. 15 and 16 are explanatory diagrams showing other arrangement rows of display devices 85 and display surfaces in those cases. FIG. 17 is a diagram showing an example of the change in surface potential on the photoreceptor at each processing stage of the copying process. FIG. 18 is a diagram showing an example of the relationship between the surface potential of the photoreceptor and time and temperature. , FIG. 19 is a diagram showing an example of the relationship between the aging deterioration of the photoreceptor and the residual potential. FIG. 20 is a block diagram showing an example of the system configuration of the speech recognition unit 115 shown in FIG. 3. FIG. 21 is a schematic diagram showing an example of the configuration of the static elimination lamp 27 shown in FIGS. 1 and 2. FIG. 24 is a schematic diagram showing another configuration example of the static elimination lamp 27. FIG. 24 is a diagram for explaining sampling of an alternating current full-wave rectified signal by the microcomputer of FIG. 2. Figures 25 and 26 (A) and (B) are similar to Figures 1 and 2.
FIG. 2 is a diagram for explaining lighting control of the halogen lamp 1 shown in the figure. FIGS. 27 and 28 are a block diagram showing another example of the rogen lamp 1 and a waveform diagram for explaining the same. FIGS. 29 and 60 are schematic diagrams showing a configuration example of the erase lamp 12 shown in FIGS. 1 and 2, and diagrams for explaining the control operation thereof. 61 to 66 are flowcharts showing examples of programs executed by the microcomputers in FIGS. 2 and 6. FIGS. 64 and 65 are flowcharts of the initialization control routine of 5TEP8 in FIG. 61. It is a diagram. FIG. 66 is a timing chart showing the operation timing of each part of the copying apparatus shown in FIG. 1 during two-sheet copying. 1... Halogen lamp 6... Scorotron charger 6... Carriage 8... Belt photoreceptor 11... Surface electrometer 12
... Erase lamp 21 ... Separate charger 27
... Static elimination lamp 41.42 ... One-chip microcomputer No. 6
Fig. 7 Fig. 8 A/Dt turret data - Fig. 9 Fig. 11 □Picture V Fig. 14 m 0 Fig. 15 b Fig. 16 c1 Fig. 17 Fig. 18 Fig. 21 Fig. 27 Fig. 22 (a) (B)'
I Correct Moxibustion No. 23
Figure 2481 Figure 34 Figure 35-

Claims (1)

[Claims of Claims] 1. Abnormal start mode detection for detecting whether the machine has stopped in the middle of the copying process due to a jam or abnormal operation when the machine is powered on, in a copying device that eliminates static electricity from a photoconductor by irradiating light. means, a dirt detection means for detecting the degree of dirt on the photoreceptor when the abnormal start mode detection means detects an intermediate stop of the machine, and a light intensity necessary for static elimination based on the detection result of the dirt detection means. a light intensity calculation means for calculating the light intensity, and selects either the erase lamp, the static elimination lamp, or only the exposure lamp according to the calculation result by the light intensity calculation means, and copies the selected lamp as the initial static elimination lamp. 1. A copying apparatus characterized in that, before a process, a static elimination control means is provided for controlling lighting while rotating the photoreceptor. 2. The dirt detection means includes an erase lamp that irradiates light toward the photoreceptor, a light receiving element that receives reflected light from the photoreceptor based on the irradiation light of the erase lamp, and a light receiving element based on the light reception result of the light receiving element. Claim 1 further comprising: dirt recognition means for recognizing the degree of dirt on the photoreceptor.
Copying device as described in section.