JPS6041056A - Double-side copying machine - Google Patents

Abstract

PURPOSE:To obtain a double-side copying machine which is made easier to operate by constituting the same in such a way that the transfer paper fed in overlap is automatically discharged into a non-sort bin, etc. even if the paper is fed in overlap in the stage of copying on the ''front'' side. CONSTITUTION:When transfer paper is fed in overlap in the stage of copying on the ''front'' side and more than the set number of sheets is stored in an intermediate tray 59, a signal ''presence of transfer paper in intermediate tray'' is detected in the stage of copying on the ''rear'' side and the copying operation on the ''rear'' side is continued until there is no more transfer paper in the tray 59. The transfer paper copied on the ''front'' side existing in an intermediate tray 58 can be discharged into a non-sort pin 62 by depressing a stop key 71. A non- sort signal is transmitted from the body side even if a sort mode is assigned on the sorter side in this stage, the transfer paper is always discharged into the bin 62.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an automatic double-sided copying machine.
Even if a double feed occurs when feeding paper for front side copying and more than the set number of transfer sheets are stored in the intermediate tray, the back side copy will be completed and subsequent copies will be made. This invention relates to a double-sided copying machine that can operate without any trouble.

(Prior art) In conventional double-sided copying machines, if double feeding of transfer paper occurs during "front" self-reproduction and extra copies are made, more than the set number of transfer paper will be transferred to the intermediate copy. It has been stored in the tray. Furthermore, since the paper feeding sequence for the set number of sheets was executed at the time of copying the "back" side, the transfer paper for the double feeding would remain in the intermediate tray.

Therefore, for example, when you try to change the size of the transfer paper next time, there will be some paper remaining in the intermediate tray.
The drawback was that the copy size could not be changed. Further, even when the copy size is not changed, there is an inconvenience that the page order becomes out of order.

(Objective) In view of the above-mentioned points, the object of the present invention is to provide a double-sided copying machine which is configured so that the subsequent copying operation can be continued without any trouble even if double feeding of transfer paper occurs during automatic copying. The purpose is to provide copying machines.

In order to achieve such an object, the present invention provides a double-sided copying machine equipped with an intermediate tray that temporarily stores the transfer paper after copying of the first side. If this occurs, the second side copying is continued until the number of sheets stored in the intermediate tray reaches zero.

(ν bottom, margin) (Example) Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1(1) is a cross-sectional view showing the overall configuration of an embodiment of a double-sided copying machine to which the present invention is applied, and FIG.
An enlarged view of the transfer paper conveyance path in Figure 1 (3) is 281
FIG. 2 is an enlarged view showing the transfer paper switch pack section in FIG.

In each of these configuration diagrams, the surface of the drum 1 is made of a three-layer seamless photoconductor using a CdS photoconductor, is rotatably supported, and is driven by a main motor ( (not shown) starts rotation in the direction of the arrow. Then, when the drum l has completed a predetermined rotation and the potential control process (preprocessing) described later is completed, the document placed on the document table crow 34 is illuminated by an illumination lamp 40 that is integrated with the first scanning mirror 38. , the reflected light is transmitted to the first scanning mirror 3a and the second scanning mirror 36.
scanned by

The first scanning mirror 38 and the second scanning mirror 38 are 1:
By moving at a speed ratio of 1/2, the document is scanned while keeping the optical path length in front of the lens 35 constant. Thus, the reflected light image described above passes through the lens 35, the third mirror 38, and the fourth mirror 37, and forms an image on the drum 1.

The drum 1 is charged at the same time by the front light lamp 8 and the front charger 2, and then charged with a corona charger 3 by the negative charger 3.
Ton (for example, ten charges) is applied. That's it, lighting lamp 40
The irradiated image is exposed to slit light. At the same time, a corona charge remover (AC or polarity opposite to the primary charge, for example -) is applied to the secondary strip remover 4, and then the entire surface is uniformly exposed using an exposure lamp 8, thereby causing a high density on the drum l. Forms a contrast electrostatic latent image.

Next, the electrostatic latent image on the photosensitive drum 1'' is developed by a developing roller of a developing device 7, visualized as a toner image, and the toner image is transferred by a transfer charger 5.

-1 The transfer paper in the first-stage cassette 13 or the lower cassette 14 is fed into this copying machine by the paper feed roller 11 or 12, and is sent in the direction of the photosensitive drum 1 by the registration roller 15 with accurate timing, so that the leading edge of the latent image and The leading edge of the transfer paper is aligned. Thereafter, as the transfer paper passes between the transfer charger 5 and the drums 1 and 1, the drum 1
The image of I.Na above is rolled.

After the transfer is completed, the transfer paper is separated from the drum, passed through the paper detection sensor 16, guided to the pickling roller 32 by the conveyor belt +7, held at a constant A by pressure and heating, and then transferred to the discharge rollers 19-1 and 19. -2 detects sensor 1
After 8, 1 no 1 was ejected from the aircraft.

After finishing the fixing, the fixing roller 32 is cleaned by the web 30. After the transfer, tram 1 rotates #;;'.

Then, the surface is cleaned by a cleaning device 6 composed of a cleaning roller and an elastic plate.

The bed disk 200 includes a deck 54 that can be cut out from the main body 100 and can accommodate 2000 sheets of transfer paper, and an intermediate tray 59 for double-sided copying. Also, 2
The lifter 54L of the deck 54, which can accommodate 1,000 sheets, is raised according to the amount of transfer paper so that the transfer paper always comes into contact with the paper feed roller 50.

For double-sided copying, first press the flapper 33-1 of the main body 100.
is raised to guide the copied transfer paper to the pedestal 200 side, and pass it through the conveyance path 57 of the pedestal 200 to the intermediate j
- Store in ray 58. Then, the paper size control plate 5G is moved according to the paper size to be stored. This intermediate tray 59 can store up to 98 sheets of transfer paper.

During the next back side copying, the transfer paper stored in the intermediate tray 59 is guided to the registration roller 15 of the main body 100 via the path 58 by the action of the paper feed rollers 51 and 52 and the separation roller 53.

Further, 300 shown in FIG. 1 (1) is an automatic document feeder 1.
(ADF), 67-1 is a paper feed tray for loading a document, and 67-2 is a paper discharge tray. When a copy start button (not shown) provided on the main body 100 is pressed, the original is transferred to the paper feed roller 13B-1 and the transport roller H-1.
2. It is guided to a conveyor belt (H-4) via a separating roller 88-3 for preventing double feeding. Then, the original is placed in a predetermined position on the original glass 34'2 of the main body 1oo, and the copying operation begins. When the first copying operation for the original is completed, the transport bell hEi8-4 is operated to eject the original to the paper tray 67-2 via the paper ejection section 68-5. Furthermore, while the document is in the paper feed tray 67-1, the next document is fed simultaneously with the paper ejection operation.

Furthermore, 400 is a collating device (sorter) that collates the copies ejected from the main body. 66 is a sort bin,
The number of bins is 20. 62 is a non-sorting bin, and in the case of 21 or more copies from one original, the 21st and subsequent transfer sheets after copying are completed, or the main body 100
When interrupt copying occurs in , the transfer paper υ1 after the end of interrupt copying is ejected. 64 is a sorter 400
This flapper is used to flow transfer paper to the next stage sorter when multiple units are used in conjunction with each other.

FIG. 2 is a plan view showing an operation panel provided on the copying machine main body 100 shown in FIG. 1(1). In the figure, 7
5 is the upper cassette 13. This key is used to select the lower cassette 14 and the 2000-sheet storage deck 54. 81 is a slide lever for setting copy density;
Position 5 indicates the standard concentration.

73 is a numeric key for setting the number of copies, 74 is a clear key for canceling the numeric value, and 72 is a key that temporarily interrupts the copying operation and executes another copy before the copying of set a is completed by key 73. 70 is a copy key for instructing the start of copying;
Reference numeral 71 is a stop key for stopping a copy operation during continuous copying, and keys 78, 77, and 78 are keys for selecting a same size copy, an enlarged copy, and a reduced copy, respectively.

84 to 96 are indicators for displaying the selected reduction ratio, 96 displays the selected reduction copy mode, 95 displays the enlargement copy mode, and 94 displays the same-size copy mode. .

Further, 83 is a display for displaying the cassette 1-13, 14 or deck 54 selected by the cassette selection key 75, and 92 is a display for displaying the size of the transfer paper loaded in the selected cassette. It is an indicator. The display 82 also blinks if the selected cassette is inappropriate when the reduction key 78 is turned on. At the same time, the size of the previously selected cassette is also illuminated.

Further, 82 to 88 are warning indicators regarding the main unit, all of which are displayed with pictograms. That is, 82 is a paper feed check indicator, which lights up when copy paper is jammed inside the machine. Reference numeral 83 lights up when there is no cassette in the cassette I/stand indicated by the transfer paper/cassette indicator, or when there is no transfer paper in the cassette set in the cassette/stand. Reference numeral 84 denotes a discharged toner full indicator, which lights up when a container (not shown) is full of toner that has been used once and collected within the copying board. 8
Reference numeral 5 denotes a developer replenishment indicator, which lights up when the developer in the developing device reaches a specified amount. 86 is a key counter confirmation indicator, which lights up when the key counter is not inserted into the socket of the main body.

Reference numeral 88 denotes a wait (wait a) indicator, which lights up when the temperature of the fixing heater is lower than a specified value when the power switch is turned on, and turns off when the temperature reaches the specified value or higher and the wait process is completed.

Reference numeral 87 denotes a number-of-copies display, and when the number of copies is set using the numeric keypad 73, the set number is displayed in seven segments, and it is possible to set from 1 to 88 copies at a time. Further, when approximately 60 seconds have elapsed after the completion of copying, or when the clear key 74 or interrupt key 72 is pressed, the display automatically returns to "01" from the display of the number of cents and the number of copies.

Reference numeral 88 denotes an interrupt indicator, which lights up when the interrupt key is pressed and goes out after the interrupt key processing is completed.

78 is a selection key for automatic exposure control mode (page AE);
By pressing this key, the density is adjusted and /<-81 is disabled, and a clear image without fogging can always be obtained on the original.

80 is an automatic duplex selection key, and an intermediate tray 59 for duplexing
(See FIGS. 1 (1) and (2)) This selection can be made only when the main body device 100 is combined with the pedicle 200 having the above configuration.

80 and 81 are LEDs (light emitting diodes) that indicate the temporary operation of double-sided copying, and ``90 is small during front J 1i'+i copying, and 81 is small during back side copying.'']
do.

Reference numeral 88 is a display device that displays the position of a paper jam (JAN) when it occurs, and uses nine LEDs to call the operator's attention.

A green LED 89 indicates that there is transfer paper in the intermediate tray 58 (see FIG. 1 CI and (2)), and is always lit as long as there is transfer paper in the intermediate tray 59.

FIG. 3(1) is a control circuit of the copying apparatus shown in FIGS. 1(1) to (3). In the figure, Q101 is a microcomputer (hereinafter referred to as a mask) that controls the drive of the main motor controller f)D+ product transformer, etc. for executing the copying process, and also controls communication with other microprocessors. be. That is, the mask Q101 is obtained by a ROM memory that stores the control programs shown in FIG. 4 (1) to (79), which will be described in detail later, as a command word P-routine, process timing data for sequence control, and a cassette sensor. This is an l-chimp microcomputer in which a RAM memory for storing size data, etc., and a CPU having an I port, a 0 port, and an I10 port for controlling human output are configured in one semiconductor chip.

Q102 is a 1-chip microcomputer equivalent to QIOI, and has built-in ROM memory (not shown).
stores control programs shown in FIGS. 5(1) to (6) and (+1) (detailed later). Hereinafter, this Q102 will be referred to as a slave.

In addition, a dynamic display unit 800 for driving each display of the operation unit (see FIG. 2) is connected to ports 1-03, 8, and 04 of the slave Q102, and a key matrix 800 corresponding to the input circuit of each key is connected. is connected to port 12 of slave Q102.

The Q103 is a 1-chip microcomputer equivalent to the QIOI, and is similar to the Bedistal 200 shown in Figure 1 (1).
control. Hereinafter, this Q103 will be referred to as a pedestal controller. Then, by performing serial communication with the master QIOI set to +jQ l+'1 on the main body side, the timing of deck sheet feeding and the sequence control in the double-sided copying mode are performed. Note that the memory (not shown) in the RO built in the 0103 has the information in Figure 6 (1) to
A control program shown in (11) is stored.

Q104 is sent to the A/D controller 8, and controls the temperature of the fuser heater by performing serial communication 4j with the mask QIOI. This A/D Konhak Q104 has four analog input power lines ADIN, and in addition to being connected to the W, I17 thermistor 850, the temperature detection part of the tram heater, the used toner check (waste), and the potential of Nahox. Check) llCd5, ノ, Q board”-
It is connected to a dummy volume (these are not shown) that was taken into account.

This A/D controller 8-Q104 and master QIOI are:
Similar to the serial communication between the slave Q102 and the master Q101 described above, serial communication is performed by a serial request from the mask Q101.

In other words, the master QIOI is controlled by an internal timer (not shown) (interrupt every 16th time by the internal timer).
Capture one of the analog inputs as 8-bit data,
At the same time, the analog input channel of A/El converter Q104 is designated.

0105 to Q107 are microcomputer Q101
and expansion I to expand the input/output ports of Q102.
It is 10.

'' The two microcomputers are connected by five serial transfer control lines, and the master QIOI controls communication. For example, the master QIQI port 1]8 serves as a request signal output terminal for communication with other microcomputers Q102.

Then, when the other party's microcomputer Q102 completes communication preparation, the ENABLE signal is sent to the master QIOI.
Return to boat 12. After that, when eight serial clocks SCK are sent from the master QIOI, the contents of the 8-bit shift register included in the other party's microprocessor Q102 and the 8-bit shift register included in the master QIOI are swapped at the same time. (See Figure 11).

More specifically, as shown in FIG. 11, SO indicates serial output data, and Si indicates serial input data. Serial output data SO is output in synchronization with the rising edge of the serial clock SCK, and serial input data is output at the falling edge of the serial clock SCK. Data Si is latched. The timing chart is the first
Shown in Figure 2.

The communication timing between these microcomputers is
When not being copied, it is managed by an inter/pulling timer. That is, as shown in FIG. 1O, slave Q10
2 is 1.248m5ec Serial communication is performed only once in 4Tr, serial communication is performed with pedicle controller Q103 once in 4 times, and serial communication is performed with A/D converter 1104 once in 16 times. Perform serial communication.

On the other hand, during the copy sequence, communication is performed with the bed controller controller 03 in synchronization with the drum clock, and communication timing with the slave Q102 and A/D controller Q104 is obtained based on the above-mentioned interval timer. .

Next, we will explain the operation during double-sided copying in Figures 1 (1) to (3).
) and FIG. 2.

First, when the automatic duplex selection key 80 shown in FIG. 2 is pressed, the LED IIO first displays that it is a "fall" side copy. Then, when the user inputs the set number of copies using the copy number set key 73 and presses the copy start key 70, the "front" side copy is executed for the set number of copies. The timing chart at this time is shown in the first half of FIG. 13 (4).

The copied transfer paper is transferred to the flapper 3 of the switch pack section.
Due to the operation 3-1, the paper is not ejected from the main body, but is stored in the intermediate tray 59 through the transport path 57 on the pedicle side.

The paper size control board 56 of the intermediate tray starts moving when the copy start key 70 is pressed in accordance with the paper size information transmitted from the master QIOI installed on the main body 100 side. At this time, the pedicle controller Q10
Serial communication data sent from 3 (Figure 8 (2)
) PMSTSO bit b3 “Intermediate tray Re”
After receiving (^ ady J signal), the main body 100 side starts the paper feeding operation.

When storing the "front" copy completed transfer paper in the intermediate tray 59, the intermediate tray paper feed roller 51 is pulled to one side by a solenoid (not shown).

When the transfer paper enters the intermediate tray 58, the master QIOI receives the serial communication data from the slave Q102 (Fig. 9 (2).
) bits b, +) of PMSTSO shown in ) are received. Then, the master Q101 sends “Φ” to the slave Q102.
The slave Q102 transmits the data of "intermediate tray transfer paper strength" (see status 1 in FIG. 7), and turns on the "intermediate tray transfer paper cloth LED J 99 (see FIG. 2)."

When the set number of sheets is stored in the intermediate tray 59, the main body +00
Both the drive systems of the pedicle 200 are stopped, and the "front" side copy display LED 9Q of the operation display section is turned off. Then, the "back" side copy display LED 91 lights up.

At this time, upper/lower cassette, deck selection display river LED9
3 goes out, and the transfer paper size display 82 92 displays the size of the transfer paper stored in the intermediate tray 59. Therefore, subsequent presses of the upper/lower cassette and deck selection keys 75 are ignored.

The automatic exposure (AE) IF selection key 78 and magnification setting keys 76, 77, and 78 can be pressed, and copies can be made at different magnifications on the "down" side and the "back" side, respectively.

However, there is no point in pressing the copy number set key 73, and the number of copies stored in the intermediate tray 58 is displayed on the copy number display 87.

When the copy start key 70 is pressed, the intermediate tray paper feed roller 5
1 is lowered by the action of a solenoid (not shown) and comes into contact with the transfer paper. And, one part is sunk in the main body 100 side. Serial communication data sent from the master QIOI (MPSTSO bit b shown in No. 81Δ(1))
- Intermediate tray 5 in response to "46 paper request" signal)
Paper feeding starts from 8. The second half of the timing chart shown in FIG. 13(4) represents this sequence.

``When the back side is copied, the fixing roller 3]-1, 3
Paper is ejected through 1-2. However, sorter 400
If the mJ is attached, turn the "down" mJ side and the "back" side and eject it. This is safe for performing page alignment for single-sided copying, and the reversing mechanism is called a switch hack mechanism.

FIG. 1(3) is an enlarged sectional view showing the switch hack mechanism as described above. As is clear from this diagram; the fixing rollers 31-1 and 31 at the time of copying the "back" side.
The transfer paper passing through -2 is transported downward by the flapper 33-1, and when the trailing edge of the transfer paper is detected by the first switch sensor 2o, the reversing roller 19-8 is rotated by the solenoid 19-12. Let flapper 33-2
to the ejection side and transfer the transfer paper to rollers 18-4 and 18-
Let υ [output through 2. After that, when the second switch sensor 21 detects the trailing edge of the transfer paper, the solenoid l
1l-12 is returned to the normal rotation side to prepare for the next switch pack operation.

Note that the conveyance path of the transfer paper becomes longer when feeding paper from the back side (feeding paper from the intermediate tray 58) and deck paper feeding (feeding paper from the deck 54) in double-sided copying mode. After the transfer paper reaches the position, the optical system starts scanning. As this timing %3, the [intermediate tray Ready] used when copying the "fall" side in single-sided copy mode
J signal (PMSTSO focus b3 shown in Figure 8 (2)
). That is, the time from when the transfer paper reaches a sensor (not shown) provided on the transfer paper conveyance path 58 of the pedestal 200 to when it reaches the registration roller 15 is measured in advance, and from the pedestal 200 side, the "intermediate tray ready" A J signal is sent, and the main body 100 starts scanning the optical system based on the signal.

The sensor provided in the transfer paper conveyance path 58 performs detection while the paper feed request is being output from the main body +00. And an intermediate tray 59 or a 2000-sheet storage deck 54
If no transfer paper is detected even after a certain period of time has elapsed since the paper feed roller rotated, it is determined that a jam has occurred in the paper feed section. However, in consideration of the case where conveyance of the transfer paper is delayed due to slippage during paper feeding, etc., the time is set twice as long as the time the transfer paper should originally reach. By doing this, even if there is a certain delay in transferring the melon, it is possible to prevent the transfer image from shifting and reduce the occurrence of jams.

In addition, if the "Front" side is being copied at the same time, the V paper is fed small, and more than the set number of sheets are stored in the intermediate tray 59.
At the same time when copying the “back” side, the “intermediate tray transfer paper cloth” signal (9th
The PMSTSO pitch I/b4 shown in FIG. It counts down from the set number of sheets, and stops counting when the count reaches zero.

Furthermore, if +(r, feed occurs when refeeding paper from the intermediate tray 59 and the intermediate tray 58 runs out of transfer paper before completing the set number of "back" side copies, the optical To terminate a copy operation without scanning the system.

In double-sided copy mode, when copying is completed on the "fall" side, the "back" copy indicator is displayed! II 1 lights up. At this time, if it is desired to cancel the "back" side copying, the stop key 71 can be pressed to eject the "down" side copy transfer paper on the intermediate tray 58.

When the stop key 7I is pressed during "back" side copy standby, the slave QI02, which controls the operation unit (see Figure 2), sends an rsT to the master Q101.
OP input” signal and “Double-sided mode back 5TAND-B”
Send the YJ signal (see Figure 8). As a result, the master Q101 energizes the main motor control section 820 and turns on the registration roller 15. In addition, the pedicle controller Q103 receives a "double-sided back mode standby" signal (see bit b4 in FIG. 8 (1)), a "paper feed request" signal, and an "image tip" signal (see FIG. 8 (1) MPST).
SO bits b, , b4) are transmitted unconditionally to cause the copy transfer sheets stored in the intermediate tray 58 to be sent out one after another to the main body side. On the main body side, the scanning of the optical system is stopped, the developing bias is set so that toner does not adhere to the photosensitive drum, and only the blank exposure lamp is turned on, so that sheets are continuously ejected from the main body.

At this time, if the sorter 400 is installed, even if the sorter side has selected the -I mode, the master QIQI
to Q108.

Next, interrupt processing during double-sided copying will be explained.

If you press the interrupt key 72 while the duplex copy mode is in progress, the currently running operation mode will be temporarily stopped! 1- Do. Then, the data that has already been set, such as the set number of sheets, the selection of the front panel, the copy magnification, the AE/MANUAL selection 1 duplex "Front J/R back" mode, etc., is saved, and the interrupt display 88 is displayed.
lights up. It then waits for a new key to be pressed.

However, the double-sided copy mode can only be specified when the selected center size matches the size of the transfer paper currently in the intermediate tray.

At this time, since the copy transfer paper before the interruption is stored in the intermediate tray 59, the number of double-sided copies that can be set in the interruption mode varies from the maximum number of sheets stored in the intermediate tray to the current number stored in the intermediate tray 59. The number of sheets is calculated by subtracting the number of sheets.

For example, if the maximum number of sheets stored in the intermediate tray 58 is 89, and 30 sheets of "front" side completed copy transfer paper are already stored in the intermediate tray 59, one
It is possible to set the number of double-sided copies up to 89 sheets.

Note that the transfer paper already stored in the intermediate tray 59 before the interruption is not affected by the interruption process. The reason for this is that the transfer paper that has been copied on the "fall" side by the 1st interrupt processing is simply placed 1tt on the top of the intermediate tray 59.
l': Because it is forced.

Thus;! #When double-sided 1m copy mode is specified in interrupt mode, the previous copy mode is automatically returned after the interrupt double-sided copy is completed.

1: When double-sided copying is performed in the double-sided copying mode, the copy paper is discharged to the non-sort bin 62 (see FIG. 1 (1)) after copying is completed. At this time, even if the sort mode is specified on the sorter side, a non-sort signal is sent from the main body side, so the items are always sent to the non-sort bin 62 for the first time.

Next, temperature adjustment of the fixing device will be explained.

As shown in FIG. 3(1), the analog signal from the fixing thermistor 850 is introduced into the A/D converter Q 104 for A/D conversion. Then, the digitized temperature information is sent to the master QIOI via serial communication, and the temperature of the fixing device is read.

After the power is turned on, when the temperature of the fixing device reaches 150'C, the fixing rollers 31-1 and 312 start to rotate at low speed, and when it reaches 170°C, they start to rotate at high speed and enter the standby state.
:to go into. The sequence is Mi13M(1) no 1\
That's right.

During stun/hay, the temperature is controlled to maintain +80°C, and if the temperature of the fixing device falls below 150°C, copying is disabled.

Generally, when copying operations are performed continuously using large holes, the heat from the fixing device is absorbed by the transfer paper, and the paper print quality gradually decreases. Therefore, when the temperature of the fixing device drops to 160° C. or less, control is performed to increase the copy interval. In other words, the interval at which the optical system is driven is increased to reduce the amount of transfer paper passing through the fixing device. The timer used to set this interval is selected to be optimal so that the temperature of the fixing device increases. Then, when the temperature rises to 170° C., the original sequence is resumed.

Here, the operation sequence when paper is fed from the deck 54 (see FIG. 1 ([)) will be described.

A pedicle controller Q103 controls turning on/off of the upper/lower deck portion and the paper feed roller. R1
In this embodiment shown in FIG. 1, the transfer paper placed on the lifter 54L is controlled so that it always contacts the paper feed roller 50 with a constant pressure.

When it becomes necessary to raise the lifter 54L during a copy operation, a "Deck LiFT UP request" signal (see bit b5 of PMSTSO shown in FIG. 9) is serially transferred from the pedicle controller Q1'03 to the master QIOI. Then, the master Q101 stops the power supply to the fuser heater and also displays the message "Deep FT UPiNH".
iBiT J (see MPSTSO focus b5 shown in Figure 9 (1)) is lowered to low level, and the petistal 20
Allow the lift amplifier of the deck 54 to be set to 0 II).

When the deck lift-up is completed, the pedestal 200 turns off the "Deck LiFT UP Request I" signal. Based on this, the master Q101 resumes temperature control of the heater.

When performing deck feeding, it is necessary to lift up every 30 sheets. Further, the time required to lift up the deck is approximately 0.8 seconds. Therefore, even if the fuser heater is turned off for about 0.8 seconds during continuous copying, there will be little trouble in controlling the temperature.

In the embodiments described above, temperature control is performed by serial communication between multiple microcomputers, but control by a single microcomputer or by hard logic as shown in FIG. 3 (2) is also possible. It is possible.

FIG. 3(2) shows heart logic for turning off the fixing heater when the deck 54 (see FIG. 1(1)) is lifted up. Here, the deck lift signal 140-1
is sent from the deck up/down control circuit 881 connected to the pedicle controller Q103. and,
This deck lift signal 140-1 is applied to the inverter +40-
2, together with the fixing heater on signal 140-3,
Antogame) will be introduced at +40-4.

Therefore, when the deck lift signal 140-1 is at a high level, the deck lift motor is driven, but at the same time the fixing heater is turned off, so an increase in power consumption of the entire copying machine is suppressed. It turns out.

In this way, it is possible to control the on/off of the fixing heater using the bar sync without using any other processor.

FIG. 3(3) shows the circuit configuration of the AC controller.

AC drive control of this copying machine will be explained below using this figure.

The outlet Pl is connected to the main switch SWI via a line filter LFI. Further, microswitches MSI and MS2 are provided on the front door and rear door sides. Therefore, at the 74th time when the front door is opened, the AC
Human power will be turned off.

The H-th drum heater is shown and the temperature of the drum is adjusted.

Further, R2 and R3 respectively represent a 1° heater and a lower heater of the fixing device. F old, FM2, and FM3 indicate a transport fan, an optical system fan, and a heat exhaust fan, respectively.

The old main motor was used to rotate the transport drum.

LAI stands for halogen lamp.

The output side of the transformer Tl is connected to the D CTlj source circuit.

In addition, the main motor Ml of this copying machine is 9.times.j'
At times, it rotates at high speed, and at time of reduction copying, it rotates at low speed. Therefore, the control ijm signal [lR1ID,)l from the mask Ho+ (see Fig. 3 (1) *) and DRMD,
The main motor is equipped with a drive unit that receives the signal L and supplies power to the main motor.

FIGS. 4(1) to (78) are flowcharts showing the control procedure of the master QIOI.

First, the explanation will be given sequentially starting from FIG. 4 (1).

In step S4, the RAM boat is initialized. That is, the data RAM and I10 port are initialized at power-on.

Step S6 is a processing program for inputting to the input boat, and step S8 is a monitoring program executed when the optical system returns to the home position.

The program after step SIO is called a status program, and sequence control is managed using status numbers. That is, in step SlO,
"Status load" means that the corresponding status number will be called. Thus, as shown in steps S12 to S30, the processing contents are divided.

Step S12 is a processing program for determining whether or not the main unit is powered on; step 814 is a standby processing program for turning on the heater until it reaches a certain temperature; and steps Si6 to S2') are for controlling potential-controlled rotation. It is a processing program.

Step S22 indicates a standby loop. That is,
The potential controlled rotation ends when the predetermined temperature is reached, and the copy J$
This is a processing program that waits in a state where the start button is accepted.

Step S24 shows a processing program and its potential control processing performed when the copy button is pressed down. Step 32B is an AE control processing program that is executed thereafter.

Step 828 is a processing program for actually executing the copy, and step S30 is a processing program for performing post-rotation.

Next, the time interval (TiN
T) will be explained.

The master QIOI is interlaced with an internal timer every 1.248 milliseconds. Step 93
8, output processing of serial communication is performed every 1.248 milliseconds.

In step 840, this subroutine is processed at fixed time intervals. That is, if you want to do something after a certain period of time has elapsed from a certain process, you can set a timer in the main routine to count this certain period of time and perform the process.

5iNT shown in FIG. 4(3) indicates a serial reception interrupt.

Is each step S38 to S340 a serial communication from slave Q102? , serial communication from pedestal controller Q103? , A/
Is it serial communication from D converter 104? Judge that.

In this way, the storage location is determined according to each received content (steps S, 42, S44.54B). That is, processing is performed to set the received data in each area based on the status or address number.

In Figure 4 (4), the optical system registration interrupt (iNTl)
Perform processing.

A pulse sent from an encoder (not shown) attached to the drive motor of the moving optical system is received to determine whether the moving optical system is moving forward or backward (steps S52, S54).

If the moving optical system is now advanced, step 5
At fi8, the value of the counter is increased by 1. Therefore, by monitoring the value of this counter, the reversal position of the moving optical system can be known.

In step S70, registration timing is determined. That is, in this step, the timing to actually feed the paper is determined. Then, when the leading edge of the original reaches the stop position, the registration clutch is turned on for the first time to align the transfer paper and the leading edge of the original (step 572).

If the moving optical system is moving backward (step 554), it is determined in step 35B whether AE scanning should be performed. If NO, the AE measurement is stopped (Step 358), and if YES, the counter is incremented by 1 (step 358).
step 560).

When the count value of this counter reaches 6, step s
At step 64, an optical system stop request is set and the process ends.

In 1NT2 shown in FIG. 4 (5), the drum clock is included. That is, this is a processing program that detects the l-ram clock generated by rotating the main motor and counts it one clock at a time.

In step 978, an area called drum counter is set to 1.
It increases by 1 for each interrupt.

Then, in step S80, clock timer processing is performed.

From Figure 4 (6) onwards, we will explain more detailed processing steps.
<I'm going.

In step S86, data to be sent to the slave Q102 is set (intermediate tray presence/absence set).

In step 988, it is determined whether the 24-port power supply is on (main switch on). Note that when the main switch on the main unit is turned off, the microcomputer itself remains in operation, but the 24-port system is turned off.

In step S90, jam detection is performed. '+i, If the transfer paper still remains in the sensor part when the power is turned on,
This means that the jam is not completely processed.

If the error occurs, a serviceman call error will be issued.
Control is transferred to 5VERR (SV error) and the operation of the main unit is stopped. Then, a serviceman call is displayed on the display.

For example, if the thermistor that detects the temperature of the fixing device is disconnected, the fixing device itself will burn out, so when the disconnection is detected, all outputs are turned off and an abnormality occurrence indication rEOo J is displayed.

In step 886 (control force counter check), it is checked whether a key counter (also called a control counter) provided in the main body of the copying machine is inserted. Therefore, this counter is deleted during copying.
When it is removed, the copy operation is stopped.

Step 598 is the pedestal controller QI03
Indicates the sending program to.

In step 5100, input to the data bus DB (ie, input to the port) is performed.

Stella 7'5102 performs transmission to the pedicle controller Q103. This is step 398.
This is the case of 5I02. The reason is step 5
100 (DB large input requires some time, so it is necessary to use such a processing procedure.

In step 5104, input to the I10 expander (ie, expanded Ilo Q105, 010e, etc.) is performed. In this case as well, it will take some time, so in step 8106 the data is sent to the pedicle controller QI03 t1.

In steps 5108 and 5IIO, step 510
Extension similar to 4 I10 Performs manual processing. Then, in step 5112, the petistal controller Q
103.

In step 5114, a home check of the optical system is performed. That is, this is a program that changes whether or not the optical system moves backward and reaches the Baum position during the copy sequence.

In step 16, the size of the paper cassette is checked.

Switch pack processing (Fig. 1 (
3)). Here, what is switchpunk processing?
This refers to the process of reversing the copy paper when it is discharged to the sorter after copying the "back" side.

Thereafter, in step 5120 shown in FIG. 4(7), the process moves to each status process.

Status (STS) Equipped with 10 gussets (7). "Status" 3rd place 4 pi) Road" in Step 5120 is
I am trying to load the top 4 bits of the TS area (8 bits, t). In this way, the L-order 4 bits are loaded before jumping. And the top 4)
・Jumps to one of STS 0 to 8 depending on the content.

In step 5122 (see FIG. 4 (8)), the lower four pintos of the status STS are loaded. And the bottom 4
Jumps according to the contents of the bit. Note that when the power is turned on, this area called STS is cleared, so the process starts from status OO.

In step 5124 (see FIG. 4 (8)), it is determined whether the 24-volt system is turned on. The microcomputer itself does not stop operating even when the main switch is turned off, and it only operates when the copier's power plug is plugged into an outlet.

When the 24 volt system is turned on, the step 512
Move on to 8 (Jam killing). Here, it is determined whether or not the jam detection operation is performed at a position where jam detection is not performed.

Therefore, in the case of YES, the operation of the JAN detection sensor is stopped. On the other hand, in the case of NO (that is, when the sensor is activated), it is determined whether the transfer paper is caught on the sensor. Here, if the transfer paper is stuck, the position of the jam is set and displayed.

Status 5TSO1 step 5144 (Fig. 4)
10)), it is detected whether the power is turned on.

``If the power is on, a ``power-on status transmission 1) request (step 514B) J'' is sent to each microcomputer.

That is, "1" is given to the lowest bit of status 0 sent from the master QIOI to the slave Q102 (see FIG. 7 (1)) (step 514).
8).

In step 5I48, "00J" is added to the area called STS.
Put in.

The 5TSOI mentioned here is a processing program that is executed when a jam occurs once.

Next, status 5TSIO (Figure 4 (12) Reference 1j ((
).

In step S152, the jam position data is cleared,
In step 5154, the jam flag is reset.

In step 5156, the above-mentioned transmission data (Fig. 7 (
1) The bit b, ) with the status O shown in 1) is sent.

In step 5158, the presence or absence of a jam is notified to the pedicle controller Q103.

Step 5160 is a processing program that performs potential control (measuring the surface potential of the drum and controlling the charger, exposure lamp, developer, etc. in order to obtain the best image). Here, DV bias means "developing bias".

In step 9182, the lower heater of the fixing device is turned on.

Further, in step 3184, the upper heater of the fixing device is turned on.

Thereafter, in step 8166, a four minute timer is set. This determines whether or not the thermistor for temperature detection is abnormal.

Thereafter, control is transferred to status 5TSII (step 5IE18).

In the status 5TSII shown in FIG. 4 (13), it is first detected whether the temperature of the constant thermometer has reached 150 degrees (
step 5170).

However, if the temperature does not reach 150°C even after 4 minutes (
Step SL? In step 2), it is determined that the thermistor is disconnected, and a serviceman call error (EO) is displayed in full (step 5174). Then, all functions at each port are stopped.

When the temperature of the fuser reaches 150°C, step 917
Other killings are carried out in B. This is similar to the jam killing described above, and also controls the state of the other jam killing setting switches. Here, other types of killing include, for example, killing without paper, killing without developer, etc. “NO” in normal cases
Therefore, in step 5178, it is determined whether the "rear door" is opened. After this, the door cannot be opened by a general user, but may be opened by a service person. However, the main motor automatically starts rotating when the fuser temperature reaches a predetermined value, so if the rear door is open, it is necessary to finish the process without rotating the main motor to prevent danger. There is.

Therefore, in step 8180, a flag indicating that the wait has been completed is set, and control is transferred to status 5T94B (step 5182).

If the rear door is closed, potential controlled rotation is performed in step 5184.

After the developing bias is set to a predetermined bias value, the main motor is rotated at a low speed (step 3188), and the resist clutch is turned on (step 5188).

Then turn on the -1 front lamp (step 51130)
, Turn on the heat exhaust fan Step Sl! 112), blank exposure is performed (step 5194).

Step 6196 sets a flag indicating that the drum is rotating, and step 8198 resets the flip-flop to interrupt the drum crotter.

Step 5200 turns on the secondary high pressure; step 520
2 clears the drum clock count value, and step 5204 sets the next status code (STS←1
2) It is a processing program that performs.

Next, the status 5TSI2 shown in FIG. 4 (14) will be explained.

Check the drum clock in steps 5208 and 5208, and after counting the IH clock, Stella:
Control is transferred to y'5210. In other words, it counts the drum clock obtained by the rotation of the main motor (
(See 1NT2 shown in FIG. 4(5)).

In step 5210, the secondary high pressure is turned off, and in step 5212, a 3 minute timer is set. Using this 3-minute timer, it is determined whether the temperature of the fixing heater reaches 170'0 (see Status 5TS13).

In status 5TS13 shown in FIG. 4 (15), first, in step 5214, the temperature of the fixing heater is adjusted.
- Next, in step 5216, the temperature of the fuser is set to 170
Detect whether the temperature has reached ℃.

However, if the temperature does not reach 170''C even after 3 minutes (step 5218), a serviceman call error is displayed.

If the fuser heater reaches 170° C., in step 5222, the low speed rotation of the main motor is turned off.

In step 5224, the lower fixing heater is turned off. After that, control is transferred to status 5TS20 (step 5
226).

In status 5TS2 shown in FIG. 4 (16), the temperature of the fixing device is first adjusted (step 5228), and the process branches to statuses 5TS20, 5TS21, and 5TS22, respectively, depending on the lower bit of the status.

In the status 5TS20 shown in FIG. 4 (17), first, a lens same-magnification request is sent to the slave Q102 (see FIG. 7 (2)). Next, step 5234
, set a 30 millisecond timer.

Due to this time difference (30 milliseconds), it waits for the communication to slave Q102 to be completed.

Then, after 30 milliseconds have elapsed, 21 is stored in the next area called status STS (step 5238).

In the status 5TS2+ shown in FIG. 4 (18), step 5238 detects completion of type time measurement.

This is a step in which it is determined whether the 30 millisecond timer set by the status 5TS20 has completed timing.

When the 30 millisecond time measurement is completed, the process proceeds to step S240 and subsequent steps, and potential-controlled rotation is performed. here.

``D +vi counter 4 times cent j means lI'' Detection of bright area potential v2, and its output is
It is a good idea to increase the number of times of potential control to four times.

In step 5242, a developing bias is set, and in step 5244, the main motor is rotated at high speed.

Step 5246 turns on the primary and secondary high pressures, step 5248 turns on the separation high pressure, and step 525
At 0, the drum heater is turned off, and at step 5252, the color 1 white of the drum cloak is cleared.

In step 5254, it is determined whether the moving optical system is at the home position. If the moving optical system is not at the home position, the optical system reverse clutch is turned on in step 5256, thereby returning the moving optical system to the home position. Thereafter, control is transferred to status 5TS22 (step 5258).

In status 5TS22 shown in FIG. 4 (19), first, the time point when 169 drum clocks are generated is detected (steps 5280 and 9282). and,
If the 168 clock is detected, the count value of the drum clock is cleared (step 8284), and the process moves to status 5T330.

In steps 5272 and 5274 of status 5TS30 (see FIG. 4 (21)), it is determined whether 150 drum clocks have been generated. If 150 clocks are detected, the lamp/heater switching relay is turned on in step 5276. Here, the lamp means a halogen lamp, and the heater means a fixing heater. Turning on this switching relay means setting the relay contact to the halogen lamp side.

However, at this stage, the halogen lamp is not yet lit.

Step 8278 (vlL set) is a processing program that lights up the blank exposure lamp intensely and measures the surface potential corresponding to the bright area of the photoreceptor.

At step 5280, the count E of the drum clock is cleared and the process moves to the next status 5TS31 (step 5282).

In status 5TS31 shown in FIG. 4 (22), it is first determined whether seven drum clocks have been detected (steps 5284, 52813). Dora. Muklok is 7
If detected, the blank exposure lamp is turned off in step 8288, and the count value of the drum clock is cleared in step 5290. After that, control is transferred to status 5TS32 (step 52
92).

In the status 5TS32 shown in FIG. 4 (23), the drum clock is 15 (if one is detected (step 52
94.52118), the dark potential v is measured (steps 5298, 5300), A"ht+, v,
Similar to setting (see step 8278), a command for the processing program for measuring the surface potential (potential of the dark area) is set.

In step 5302, 1 is subtracted from the vonvlL counter ceratoi 1 (see step 5240). Therefore, since these counters are previously set to "-4" in status 5TS21, status 5TS33 (step 8308) is actually repeated four times. After completing the four loops, control is transferred to status 5TS40 in step 330B.

In the status 5TS33 shown in FIG. 4 (24).

Step 5310゜9 to detect 7 drum clocks
312), turn on the blank exposure lamp Step 5
314), clear the count value of the drum clock (step 531B), then control the status 5T
Move to S30. Then, the potential control by VO and V is performed by 4
Repeat status 5T530-33 until the end of the cycle.
Then, when the VD +vtL potential control is completed, the process advances to status 5TS40.

In the status 5TS40 shown in FIG. 4 (26), the step 5324 first determines whether the moving optical system is at the home position.

If the moving optical system has not returned to the home position, a step 5332 determines whether the moving optical system is moving backward or not. When the vehicle is not moving backward, the optical system reverse is clutched on in step 5334, and the optical system is returned to the home position.

If the moving optical system is in the home position, step 83
At step 26, the exposure lamp is turned on and the standard white plate 70 is irradiated with the standard amount of light, and at step 6328, the VLt counter is set to 3. As a result, the standard bright area potential VL
+ surface potential measurement will be performed three times. And 5T
Control is transferred to S41 (step S33.).

In the status 5TS41 shown in FIG. 4 (27).

Step 333B to detect IH drum clocks;
53Z8), and then in step 5340 it is determined whether the lens movement is completed. That is, it is determined whether the zoom lens is at the same magnification level. If it is at the same magnification position, VL+ is set in step 8346. That is, the surface potential of a standard bright area is measured.

In step 2 5348, the count value of the drum clock is cleared, 42 is stored in area STS, and control is transferred to status 5TS42.

In status 5TS42, 157 drum clocks are detected (Steps 5352, 5354), Step 5
At 356, 1 is deleted from the VL+ counter. Already, V
Since "3" is set in the L□ counter, this loop will be repeated three times.

Thereafter, in step 5360, VL2 is set and the surface potential of the standard bright area on the surface of the photoreceptor is measured. Then, control is transferred to status 5TS43 (step 3
384).

In the status 5TS4'3 shown in FIG. 4 (28), seven drum clocks are first detected (step 5388).
, in subsequent step 5370, it is determined whether a copy operation is in progress. If copying is not in progress, the process moves to step 5372 and the fog light lamp is turned off.

Next, set the “wait complete” signal in Step 53.
74) Turn off the primary high pressure step 5378)
, turn off the transfer high pressure step 5378), clear the drum clock count value step 5380)
, transfers control to status 5TS44.

In the status 5TS44 shown in Figure 54 (29), after counting 14 drum clocks (step 53)
8ft, 8388), and switches the heater relay to the heater side (step 5390).

Step 5382 turns off the minute crystal pressure, step 5394 clears the drum clock, and step 5
At 386, 45 is stored in area STS.

In the status STS 45 shown in FIG. 4 (30).

First, step 539 detects 14 drum clocks.
8.5400), and in step 5402, the heater of the insulator is turned on.

In step 5404, the rotation of the main motor is stopped. After that, in step S4Qθ, “18U1.ON
"Medium flag" is turned off, and in step 5408 Kanayama 1
Turn off the lamp.

In step 5410, the 1/syst clutch is turned off, in step 5412, the developing bias is set to zero, and in step 5414, the secondary high voltage is turned off.

Thereafter, in step 5416, 46
is stored and control is transferred to status 5TS48.

In status 5TS4B shown in FIG. 4 (31), first, in step 8418, the one minute flag is turned off. In other words, time management is required when measuring the surface potential, and this is because the number of times the potential is controlled varies depending on the time the device is left unused. Therefore, in step 5422, the one-minute timer is set to Seriton, and then control is transferred to status 5TS50 (step 5424).

Status 5TS5 shown in FIG. 4 (32) is a standby routine. First, in step 8426, toner volume and waste toner volume are checked.

In step 5428, a jam check is performed. If the paper is detected by the separation sensor or the paper discharge sensor, a jam flag is set as a vapor jam (steps 5430 and 9432).

In step 5434, the temperature of the fixing device is adjusted. In this embodiment, since the temperature is controlled at 180 degrees, the heater is turned on and off so that the temperature of the fixing device becomes 180 degrees.

Also, in step 5440 (ready check),
Check various conditions. For example, by checking the presence or absence of a key counter, it is checked whether fJlj is in a state where copying can be started.

In Stella 7'5442, pedicle controller Q
A speed control signal for the intermediate tray conveyance motor is sent to 103. This makes it possible to synchronize the rotation of the main motor.

The speed control of such a motor is performed using the MPS shown in FIG. 9 (1).
TS2 lowest pitch l-b, (motor LOνi/)I
This is done by IGI().

In step 5444, it is determined whether automatic power shunt-off should be performed. In other words, it is equipped with an auto-shutoff function that automatically turns off the main switch if no operation is performed within about 2 hours after the end of the copying operation. It is determined in this step whether or not it should be executed.

If it is determined that the main switch should not be turned off, then in step 5446 it is determined whether the main switch is in a ready state or the machine is in a ready state.

When in the ready state, it is checked in step 8448 whether the copy start key has been pressed. If the copy start key is pressed, the pedicle controller Q1
Inform 03 of the set number of sheets.

- If the copy start key is not pressed, return to the main routine.

Next, in step 5452, communication data to the petistal controller Q103 is initialized, and in step 5454
Now set the "copying border".

In step 8456, it is determined whether the mode is double-sided copy mode. When in double-sided copy mode, the intermediate tray is used, so the pedicle controller Q103
abnormality/normality is checked (step 5458). If there is no abnormality, the process goes to step 5460 to determine whether the self-reproduction mode is set or not. enqueue (step 3462). That is, if the transfer paper is already stored in the intermediate tray, the control plate cannot be moved, so the presence or absence of the transfer paper is checked in this control step.

If there is no transfer paper in the intermediate tray, step 5464
Next up, Hetiscle Controller. 103 (see FIG. 9 (1) MPSTSI).

When feeding paper from the 2,000-sheet storage deck, in step 5468, the pedicle controller I/roller Q1
Set the deck drive refinish i for 03 (
(See Figure 8 (1)).

In step 5470, it is checked whether the size of the transfer paper is A3 size. In other words, since the sorter of the copying machine related to the wood flow side cannot sort up to B4 size, when A3 size is specified,
Unconditionally send U to the non-sort bin. Therefore, if it is determined in step 5470 that the size is A3, a non-so I request is set in step 5472 (see Q108 in FIG. 3(1)).

In step 5474, a pin cam return signal BCR is set for the sorter. As a result, the elevator for discharging sheets to the appropriate bin provided on the sorter side is returned to its home position.

In step 5476, Q108 (see FIG. 3 (1))
In line with this, a "sorter on" signal is sent to turn on the transport system motor. That is, this is a command to turn on the conveyance system motor in order to discharge the paper.

Thereafter, 60 is stored in area STS and control is transferred to status 5TS80 (step 9478).

In the status 5TS60 shown in FIG. 4 (35), first in step 5486, a separation fan (a fan for peeling off the transfer paper from the translucent material) is rotated at high speed. Note that the separation fan usually rotates at low speed.

In step 5488, whether the main motor is rotating at high speed or rotating at low speed is changed. The rotation speed of the main motor is determined by the copying magnification -11, and when the magnification is 80% or more, the rotation speed is -71, and when the magnification is less than 80%, the rotation speed is low.

Depending on the rotation speed of the main motor, the process branches to step 5494 or 5490, and the developing bias value is changed.

In step 5488, a drum-on flag J (internal flag indicating that the drum is rotating) is set.

Thereafter, in step 8506, it is determined whether the moving optical system is at the home position. If it is not at the home position, the lens movement is completed (step 55 (18)) and the optical system is moved backward (step 5510).
.

Again in step 5512, the 1111 fans are turned on.

In step 5514, the lower heater of the fixing point is turned on, in step 5518, the register I crank is turned on, and in step 5518 (blank fist all on), all the lamps for erasing the surface of the photoreceptor are turned on. let

Next, in step 5520 shown in FIG. 4 (36), the primary high voltage (1 (VT)) and the secondary high voltage are turned on.

In step 5522, PO8T, high voltage for separation and transfer are turned on. Then, in step 5524, the drum clock is cleared, and in step 5528, it is checked whether the copy magnification is the same as the previous copy. This is to control the surface potential according to the high-speed or low-speed rotation of the motor, that is, according to the magnification.

If the magnification is not the same as last time, status 5TS8+
Transfer control to

If the magnification is the same as the previous time, the time elapsed is
Check at 28. This is because the amount of charge on the photoreceptor surface changes with the passage of time.
The surface potential is 1 depending on the number of minutes! This is because the method for determining ll+ is different.

In step 5530, it is determined whether automatic exposure (AE) is being used. This is because the sequence operation changes depending on whether it is AE or not.

In the case of AE, 70 is stored in area STS and control is transferred to status 5TS70 (step 5534).
.

In the status 5TSfil shown in FIG. 4 (37),
First, the 168 drum clocks are checked (step 55313, 5538), and then it is checked whether the moving optical system is at the home position (step 5540).

When the moving optical system is at the home position, the area STS
Stores 62 in and transfers control to status 5TS82 (
Step 3548).

If the moving optical system is not in the home position, step 55
At 46, the optical system is moved backward.

In status 5TS62 shown in Fig. 4 (3rd day), first, the status 5TS62 is set to detect that the moving optical system has reached the home position.
Step 5552), and then it is determined whether or not the "back" side copy mode is in effect (Step 5554).

When not in "Back" self-reply mode, use Steab 5558.
At this step, it is determined whether or not the paper is being fed from the deck (feeding from the 2000-sheet storage deck 54).

When performing deck paper feeding, in step 8558, a "paper feeding request" is set to the bed controller Q103 (MPSTSO shown in FIG. 9 (1)).
reference).

In step 5560, all blank exposure lamps are turned off.

Step 5562 is a control step to determine whether the mode (magnification) is the same as the previous time. If the mode is the same as last time, step S5? Perform the processing after O.

Also, if the mode is different from 1111 times, step 5
Clear the tram clock at 564 and step 8
V in 566. ,■1 counter to n+1
(here, the maximum value of n is 4), step 556
8, 63 is stored in area STS.

In the status 5TS83 shown in FIG. 4 (39), first check the 150 drum clocks in step 55.
78', 5580), next item, bright area potential v of the photoreceptor,
Start measurement (STAB 5582).

After that, the drum clock is cleared in the steerer 5584, and the 64 in the area STS is cleared in step 8586.
Store.

The status 5TS64 shown in FIG. 4 (40) indicates that the 7 drum clocks should be checked.
5590), turn off the blank exposure lamp Step 5
592), Steerab 55 to clear the drum clock
94), stores 65 in area STS and transfers control to status 5TS85 (steer block 5588).

In the status 5TSI35 shown in FIG. 4 (41), first check the count of 150 drum clocks in step 3598. S80θ), after counting the drum clock (clearing 16 (step 5802), start measuring the dark potential VD (step 5f10).
4). That is, in step 5604, a mode is set in which the potential in the dark area of the photoreceptor surface is fixed at At1.

In the steerer 5606, 1 is subtracted from the previously set Vo and V□ counters. Therefore, this station can only be used up to 4 times.
pass through the pump.

When it is finished (step 5f108), the lamp/
The heater switching relay is switched to the lamp side (that is, the halogen lamp side) to turn on the halogen lamp (steps se+o, 5et2). After that, 4 to area STS
0 is stored and control is transferred to status 5T340 (step 5814).

In step 381B, 88 is stored in area STS and control is transferred to status 5TSE18.

In the status 5TS8B shown in FIG. 4 (42), first check the seven drum clocks in step 3618.
．． 5820), and turn on the blank exposure lamp (step 5622).

Thereafter, the count value of the drum clock is cleared (step 5624), 63 is stored in area STS, and control is transferred to status 5TS63 (step 3828). Then, the statuses 5TSll13 to 66 are repeated until the values of the Vo, V, and L counters become 0.

Status 5TS6 shown in FIG. 4 (43)? First, let's check the 190 drum clocks in step 3.
828.9830), start VLt measurement 1. (Step 5832)' Clear the drum clock count value Step 5834) Store 68 in area STS and transfer control to status srs6g (Step 5
I33B).

The status 5TS88 shown in FIG. 4 (44) is also branched from step 8384 shown in FIG. 4 (28).

First, count the 7 drum clocks (check +R in steps 9838 and 5640), then clear the count value of the drum clocks (step 564).
2).

Thereafter, in step 5644, it is determined whether or not the AE mode is set. If the AE mode is not set, control is transferred to step 8648 (status 80), and if it is AE mode, control is transferred to step 5846 (status 71).

Status 5TS7 shown in FIG. 4 (45) is a sequence for performing an AE (automatic exposure adjustment) scan.

Here, the automatic exposure adjustment is Sequence 7 in which the density of a document is once measured in order to always obtain a clear image for any document. Then, a halogen lamp 4 for exposing the original is provided according to the measured density of the original.
The light amount of o is determined.

4. In the status 5TS70 shown in FIG. 4 (4e), first step S$ is performed to detect 30 drum clocks.
52.5654), and then checks whether the moving optical system is at the home position (step 385B).

If the moving optical system is at the home position, the halogen lamp/heater switching relay is set to the halogen lamp side (step 585B). Thereafter, when paper is to be fed from the deck (step S6θ0), a "paper feed request" is sent to the pedicle controller Q103 (step 3882).

If the moving optical system is not at the home position (Step 58)
5B) After the lens has completed moving to the predetermined position (step 5668), it is checked whether the moving optical system is moving backward (step 5670)6.
If the moving optical system is not moving backward, the optical system reverse clutch is turned on (step 5672).

In the status 5TS71 shown in FIG. 4 (47), after the lens has completed moving to the predetermined position (step 5874
), check the 7 drum clocks (St.
mpS [17e, 5878). If 7 drum clocks are detected, turn on the optical system forward clutch and step! 3880), sets the internal flag "2 lag during rAE scan" (Step 5882).

In step 8684, the lamp/heater switching relay is set to the lamp side. Then, in step 6686, the halogen lamp is turned on. This halogen lamp
The lighting voltage is changed by a microcomputer.

In step 5688, a reference lighting voltage is output in order to provide constant light 1≠ for AE measurement.

In step 589Q, all blank exposure lamps are turned on, 72 is stored in area STS, and control is switched to status 5.
Transfer to TS72 (step SS!112).

In status 5TS72 shown in FIG. 4 (48), it is checked whether the moving optical system has reached the A4 size position. This is determined by monitoring the counter in step 988 shown in FIG. 4(4).

When the moving optical system moves to the A4 size position (
Step 9684) and step 5700 start the AE measurement.

In step 5702, the forward clutch of the moving optical system is turned off. Then, in step 5704, the "optical system advancing flag" is reset. This means that the forward movement of the optical system is complete.

Thereafter, the drum clock karantoy 16 is cleared (step 5706), 73 is stored in area STS, and control is transferred to status 5TS73.

In addition, if the moving optical system has not reached the A4 size position, check whether the optical system timer (set when moving forward) has finished timing (step S81] 8).
If the moving optical system does not reach the A4 size position within the predetermined time, a serviceman call error is displayed as an abnormality (step 5698).

In status ST, S73 shown in FIG. 4 (49), control is transferred to status 5TS74 without executing anything.

The 2.5TS74 te shown in FIG. 4 (50) first detects seven drum clocks in step 57.
12.5714), then turn on the optical system backward flanch and step S? IEl), the drum clock count Ia is cleared (step 3718).

In step 5720, the AE todrum counter is cleared. This AE drum count is used to check the length of the AE measurement performed while the optical system is moving backward. Thereafter, 75 is stored in area STS and control is transferred to status 5TS75.

In the status 5TS75 shown in FIG. 4 (51), it is first checked whether the moving optical system is again at the A4 size position (step 5724). This is to check whether the optical system has returned to the A4 size position again by the backward flanch activated to cancel T#t due to the inertia of the moving optical system that has passed through the A4 position.

When the moving optical system returns to the A4 size position,
Clear the todrum counter for E (step 672B)
, transfers control to status 5TS78.

Further, if the moving optical system does not return to the A4 size position, it is assumed that an abnormality has occurred, and the 189 drum clocks are first detected in step 5730. S, 732), and then "Serviceman call error 82" is displayed. Here, 82 is a code indicating an optical system abnormality.

411th (52) Indication tSR-TAS5TS7B TE(*, Check whether the moving optical system has reached the A4 size position. Therefore, in this case, the answer is YES, and the process moves to step 5740.

Stella 7'5740 checks the AEE drum counter and determines whether the content is greater than 28 or not. If it is larger than 28, the AE measurement is started (step 5742), then the count value of the drum clock is cleared (step 5744), and control is transferred to status 5TS77.

The step 574 shown in FIG. 4 (53) is to detect 32 drum clocks.
8.5750), then the AE measurement stops. Therefore, during the execution of the AE measurement, the surface turbidity of the original is averaged, and the halogen lamp lighting voltage for the next copy to be performed is determined based on this value. Then, in step 5TS754, 78 is stored in area STS and control is transferred to status 5TS78.

In status 5TS78 shown in FIG. 4 (54), it is detected that the moving optical system has returned to the home position (step 5756). In other words, when the moving optical system returns to the home position after completing the AE II +
"Lag during scanning" is turned off (step 9758).
, transfers control to status 5TS8o.

Status 5TS8 shown in FIG. 4 (55) is a sequence program that actually performs copying. First, in step 5762, the temperature of the fixing device is maintained at a predetermined temperature.

In step 5764, a request signal for turning on the halogen lamp is detected. Here, a request signal is detected to turn on the halogen lamp, which was turned off while the moving optical system was moving backward, from the middle again.

In step 8766, it is checked whether the moving optical system has reached the halfway position (ie, the A4 size position). When the moving optical system moves backward to the A4 size position, the halogen lamp is turned on in step 8768.

In step 5770, the previously described "halogen on" request signal is resent. After that, the process branches to detailed status processing.

14 In status 5TS80 shown in Figure (5B), turn off the halogen lamp (step 5774), BC
Turn off the R (pin cam return) signal (step 57)
76), the bin shift operation of such a sorter is Ql,
08 (see FIG. 3 (1)) performs control.

In step 5778, it is determined whether the "back" self-reproduction mode should be executed. If the "back" side is not to be copied, it is determined in step 8780 whether or not the "front" side should be copied.

When copying the "front" side, the flapper 33-1 of the switch pack section is turned on (see FIG. 1 (3)). That is, when copying the "front" side in double-sided copying mode, it is necessary to introduce the transfer paper into the intermediate tray, so the flapper 33 of the switch pack section
-1 must be turned on.

In step 5784, the intermediate tray control plate 56 (first
(see Figure (1))) is completed.

This control plate limits the size of the intermediate I-lay 58 depending on the paper size.

In step 5786, the pedicle controller Q1
03 abnormality detected. In that case, serviceman call error 8B is set (step 5788).

Further, in step 5790, the mode to be executed from now on is placed in an internal area. So(7)? G. Select the source of transfer paper in steps 5792 and 5794. That is, it is determined whether to use the upper cassette or the lower cassette, or whether to feed the transfer paper manually. When feeding transfer paper manually] Turn on the two-stage pink amplifier solenoid in step 979 [1), clear the drum clock count value in step 3798), and then turn on the status 5TS8.
Transfer control to 1. If not, status 5T
Control is transferred to S83 (steps 5794, 5800,
5802).

In the status 5TS81 shown in FIG. 4 (57), first check the 17 drum clocks in step 580.
4.380B), the current to the pick-up solenoid (paper feed solenoid) is turned off (step 8808). Then, the count value of the drum clock is cleared (step 5810), and control is transferred to status 5TS82 (step 5812).

In the status 5TS82 shown in FIG. 4 (58), 40
Step 5814゜58 to detect the drum clock.
1El), and then transfers control to status 5TS83 (step 5818).

In the status 5TS83 shown in FIG. 4 (58), it is first checked whether the "back" self-reproduction mode is set (step 5820). If not, then it is checked whether the "front" self-reproduction mode is selected (step 5822). Further, if not, it is checked whether the sorter is enabled (step 58).
24).

When in the "front" self-recovery mode, this step 58
Pass 24. The reason is that there is no need to eject the paper from the main body side.

After that, turn off the heat exhaust fan in step S82'6).
, turn on the paper feed roller according to the upper or lower cassette selected by the user (step 5828), either the small counter (counter for A4 size or smaller) or the large counter (counter for B4.A3 size). (step 5830). this is,
This is useful when usage charges vary depending on the paper size. Therefore, it has no bearing on normal use in Japan.

Thereafter, the drum clock run L4+ti is cleared (step 5832), and control is transferred to status 5TS84 (step 5834).

In the status 5TS84 shown in FIG. 4 (60), first, 164 drum clocks are detected in steps 5836 and 5838, the developing eighth DC (100 volts) is turned on in step 5840, and step 58
At step 42, the developing bias AC is turned on, and at step 58
At step 44, the operation of the paper feed roller is turned off.17. Step 1. In step 5846, the small Φ counter or large counter is turned off, in step 8868, the nozzle lamp is turned on, in step 5850, the count value of the drum clock is cleared, and in step 5852, control is transferred to status 5TS 852.

In the status 5TS85 shown in FIG. 4 (61), the step 585 first detects 100 drum clocks.
4.585G), and then increases the paper feed counter by +1 (step 885B).

After executing steps 5860 and 5862, the optical system resist clutch is turned off. Here, the resist franc refers to a ``crunch'' for aligning the leading edge of the document in the optical system and the leading edge of the transfer paper (see Figure 1 (1).
).

In step 5866, the optical system forward clutch is turned on;
Step 5868 turns on the web motor.

In step 5870, whether it is the final copy or 1f1
I judge and hate. If it is determined that it is the final copy, step 5872 reads “iii!b11!
Turn off the "Copying Fraction" and set the S fat + to the pedestal controller Q103 in step 5874.
Reset Tsukuni Toy Shogo. - If it is determined that continuous copying is in progress, the output is sent to step 5876.
and turn on the [Continuous copying flag].

Thereafter, control is transferred to status 5T98B (step 5878).

In status 5TS8fl shown in FIG. 4 (62), the image tip signal is detected in step 5880. The image tip signal here is a signal indicating the leading edge of the document. Then, after detecting the image tip signal, 18 drum clocks are counted, steps 5882 and 5884), and the connection to the pin amplifier solenoid of the upper or lower cassette is turned off (step 388 ft).

Next, it is determined whether or not the "back" self-reproduction mode is set (step 5888). If so, control passes through step 5884 to status 5T.
Move to S87.

If the “back” side is not to be copied, step 589
0, it is determined whether or not paper should be fed from the deck, and if YES, the pedestal controller) and the "picture tip flag" for the roller Q103 are set (step 58i9).
2). After that, status 5TS8? transfer control to

Next, the status 5TS87 shown in FIG. 4 (63) will be explained.

In step 5896, if the moving optical system does not reach the predetermined position even after a predetermined period of time has elapsed, it is assumed that the moving optical system has stopped somewhere or a motor failure has occurred. Serviceman call error
'82'' (step 5898).

If it is not abnormal, it is determined in step 5800 whether or not paper should be fed from the deck. If paper is not fed from the deck, in step 5902, the paper size of the cassette or lower cassette is stored in the accumulator.

When paper is fed from the deck, in step 5912, the paper size on the deck is stored in the 7 storage unit.

If step 5802 is executed, it is determined in 5804 whether the transfer paper should be fed manually or not.

Steps 8806 to 5olo are a processing program for changing the copy magnification. Here RI, RIB
(Step 9908) is the reduction l (reduction rate 71
%), meaning reduction 2 (reduction rate 82%). Also, E.I.
(Ste Tsubu 51110) means expansion + (114%).

In steps 58113 to 5928, the paper size is checked. That is, since the scanning width of the moving optical system differs depending on the copying magnification and paper size, the paper size is detected in steps 5816 to 5928.

Note that EII shown in step 5834 is an enlargement magnification of 14
It means 2%.

Once the reversal position is determined (step S!a30,584
0), the blank exposure lamp is turned on in step 5842. In other words, the scanning of the moving optical system is completed here.

Next, in step 5944, the count value of the drum clock is cleared. Step 5948 clears an area in the RAM called "pixel destination" for the bed disk controller Q103.

In step 5948, 1 is added to area STS and control is transferred to status 5TS88.

If the stop key is pressed during a copy operation, there is a need to stop the operation, so in step 5950 it is checked whether the stop key has been pressed.

If the stop key is not pressed and the final copy operation is not in progress (step 5954), turn on the paper feed roller (step 5958), turn on the small counter or large counter (step 3958), and turn on the continuous copy flag. Turn on (step 8860).

Mata, if the stop key is pressed, the status 7”
SI] 524, the continuous copy flag is turned off.

In status 5T588 shown in FIG. 4 (64), first, after detecting three drum clocks (step 5962
,99+! 4) Turn off the optical system forward clutch (step 986B), then turn off the optical system forward flag (step 3968), store 88 in area STS, and transfer control to status 5TS89.

In the status 89 shown in FIG. 4 (65), step 5
At 972, it is checked whether the reduction modes PI, RII are selected. In the case of reduction mode I, the main motor speed is set to low rotation speed, so step 5
Check the 10 tram clocks at 874 and 5976. On the other hand, if the reduction motor lζ is not selected, the main motor is rotated at high speed, so five drum clocks are checked in steps 5980 and 5982. and then step 5
At 984, the optical system reverse flanch is turned on and control is transferred to status 5TS8A.

In status 8A shown in FIG. 4 (86), 13 drum clocks are first detected in step 5984.5se.
6), then turn off the halogen lamp step 58
88) Turn off the paper feed clutch and step 5III
IO), turns off the small counter or large counter (step 8992).

In step 5994, a check is made to see if there is a final copy. When it is the final copy, control branches to step 8898 and the control is transferred to status 8B. On the other hand, when it is not the final copy, the process goes to step 6996 and sends the halogen lamp on request signal (as shown in FIG. 4 (55)). (See step 8764).That is, the halogen lamp is turned on when the optical system moves backward during continuous copying, so the flag is set here.

In the status 5TS8B shown in Fig. 4 (67), first 3
Step 5 IOQO to detect 0 drum clocks.

51002), and then it is determined whether or not to perform a same size copy (step 51004). Whether or not to perform the same-size copy is a judgment as to whether or not the main motor should be rotated at high speed, so a developing bias is set in accordance with the rotation speed (steps 51008 and 5100B).

In step 5101.0, the developing bias AC system is turned off. After that, control is transferred to a different status depending on whether it is the final copy or not (steps 51016 and 5101).
4). That is, control is transferred to status 90 if it is the final copy, and to status 8c if it is not the final copy.

The status 5T88c shown in Figure 84 (138) is 4.
After detecting 7 drum clocks (step 510
17.51018), set the current tfly<477000 minutes to the predetermined 1fi step 51020.5
1022), turns on the paper feed solenoid (step 51)
0243° Then, 8D is stored in area STS, and control is transferred to status 5TS8D.

In status 5TS8D shown in FIG. 4 (68), it is determined whether the moving optical system has returned to the home position (step 5102'8). If the moving optical system has returned to the home position, the control is performed. The status is moved to 5TS85- (step 51030).

In the status 5TS8F shown in FIG. 4 (70), 56
After detecting drum clocks (step 5103
2,5I034), transfers control to status 5TS87.

Status 5TS90 shown in FIG. 4 (72) is a processing program executed when final copying is performed (fourth
(See steps 51012 and 51014 shown in IΔ(67)).

In status 90, first check whether the moving optical system has returned to the home baking stone (step 51042), and if it has returned to the home, set the developing bias to 400 volts to prevent toner from getting on it. (Step 51
044). After that, clear the count value of the drum cross (step 51048), and change the control to status 5TS.
91 (step 51048).

The status 5TS91 shown in FIG. 4 (73) is 30
After detecting the drum clocks (step 510
50, 51052), turn off the transfer high pressure step 51
054), turn off the primary high pressure step 3105fl)
, Step 5 to clear the drum clove count value
I058), stores 92 in area STS and transfers control to status 5TS92.

In the status 5TS92 shown in FIG. 4 (74), after detecting 14 drum clocks (step 51062)
゜51064), move the Zino exchange relay to the dohita side (
Step 51088).

Then, execute steps 51068 and 51070.
and transfers control to status 5TS93 (step 51
071).

In the status 5TS93 shown in FIG. 4 (75), 14
After detecting drum clocks (step 5107
2,51074), turn off the secondary high pressure step 510
76), Drum Clock Karantoy! ^ is cleared (step 31078), 94 is stored in area STS and control is transferred to status S'TS94. In status 5TS94 shown in FIG. Check to see if there is one. Since jam killing has not been selected for the passage, it is checked in step 51084 whether the stop key has been pressed. That is, since the subsequent processing differs depending on the depression of the stop key, the process branches to step 51098 or 510813.

If the stop key has been pressed (YES), it is checked in step 5101313 whether or not to copy the "back" side. When performing "back" self-copying, proceed to the next step after counting 18!9x5 drum clocks @If "back" blood copying is not performed (step 5108
6), ] f19 After counting 3 drum clocks, proceed to the next step.

The reason why the number of drum crotters to be checked differs depending on whether the "back" self-reproduction mode is set or not is because the switch pack operation performed when copying the back side requires extra time. That is, when performing 4-on-1 printing, it is necessary to turn over the transfer paper at the switch/henk l"'11".

If the stop key is not pressed (step 810)
In step 84), the process branches to step 5I09[1, and it is checked whether the number of fed sheets and the number of discharged sheets match. That is, if the number of fed sheets and the number of discharged sheets do not match, it means that there are still transfer sheets left in the machine, so the process returns to the main routine and cycles through the status 5TS84. If they match, the program from step 91098 onwards is executed and control is transferred to status 5TS95.

The Suftas 5TS95 shown in Figure 4 (77) is
After detecting 30 drum clocks (step 51
11JS1118), :ii2 Turn on the lower heater of the R unit step 51120), turn off the DC voltage of the developer/heias Stella 7' 51122), turn off the main motor step 51124), turn off the web motor step 51128) , return the separation fan to low speed step 5II28), turn off all blank frost light lamps [step 5l130), turn off the full exposure lamps step 81132), pedicle controller Q
Clear the serial data for 103, return the switchback flapper (see Figure 1 (3)) to its original state (step 5113B), and turn off the sorter on signal sent to 0108 to rotate the transport system motor. Stella 7'51138), turn off the non-sort flapper on the sorter side step 9114.0), clear all flags used by the internal microcomputer step 51
142), starts a 1-minute timer to determine the number of potential control (step 51144), and
Stores 50 in and transfers control to status 5TS50 (
Step 51141().

This ends the series of copies and returns to standby loose again.

FIG. 4 (78) and (79) show the control program on the serial data transmitting side. First, step 9
At 114B, it is determined whether transmission is in progress. Here, "transmitting" means the internal area flag (41421st
Judgment is made by looking at the highest (3rd place) 'b7) of the send counter 5NOCT shown in (79). That is, when rlJ is present in the most significant bit b7 of 5NOCT, it is determined that the transmission (g) is in progress.

If transmission is not in progress, 1 is added to the contents of the send counter (ie, 5NDCD) in step 51150. Then, bit b4 of send counter SND[ET
When becomes rlJ, transmission processing to A/D converter Q104 is performed (step 51152.5II134゜5
11813). Further, when the bit ba is not set in the send counter 5NOCT, steps 51154~
At S11[10, send counter 5NncT=t
, 5, 6. .

Determine whether or not. Then, according to this timing, a transmission process to the pedicle controller 0103 is performed (steps 51168 and 51170).

However, when the drum is rotating (that is, when copying), it is transmitted in synchronization with the drum clock, so
No transmission is performed to the pedicle controller Q103.

In addition, callan h (1/4
is 1°5! 3. In cases other than D, slave Q102
A transmission process is performed to (step 511e2).

If the transmission is in progress (step 31148), step S
At +172, the “transmitting flag” of ADC:CT
(The highest pitch F b of ADCCT shown in Fig. 4 (79)
7) Check /. This determines whether or not the data is being transmitted to the A/D converter Q104.

If the data is not being transmitted to the A/D converter QIO,4, it is determined in step S11?4 whether or not it is being transmitted to the slave Q102.

Then, if the A/D controller is communicating with Q104, add 1 to the ADO counter (step 51180), and if communicating with the slave, add 1 to the SLV counter (step S11'78). .

If the transmission is still in progress after a certain period of time has elapsed (step 91182), it is determined that an abnormality has occurred and a serviceman call error is sent (step 51184).

FIGS. 5(1) to 11) show the processing program of the slave Q102.

In FIG. 5(1), in step 31188, R'A
Initialize the M port.

In step 311813, it is checked whether the 24 port system is turned on.

When the main switch is turned on (step 9118
8 (7) YES), Step 5119, 2 Initialize the nuisance display. After that, step S! ,
At step 194, the "display flag" is turned on. This is an internal flag used by display routines.

In step 9118B, it is checked whether the power is off (24 volt system is off), and if the power is off, the process returns to step 51188.

In step 51198, it is checked whether a key has been pressed. If no key has been pressed, a display flag is set in step 51200. Then, a loop of steps 51198 to 51200 is repeated.

In step 51202 shown in FIG. 5(2), the key code [KYCOD] of the pressed key is set to the set key [KYCOD].
5KEY] area.

In step 51204, the "key present flag" is reset.
)do. This "key presence flag" is an internal flag, and is set in response to a key press. In addition,
The type of key pressed is the key code [KYCOD] mentioned above.
] Specified by.

In steps 5120B to 1230, it is determined which key was pressed and corresponding key processing is performed. That is, when the numeric keypad (number keys) is pressed, numeric key processing is performed (steps 51206, 5I).
208). If the copy start key is pressed, copy start processing is performed (steps s+21o, 5t2-
f2). Actually for the master QIOI.

It is notified through serial communication that the copy start key has been pressed.

If the stop key has been pressed, the mask Q101 is notified by serial communication that the stop key has been pressed (step S12+4°51216).

If the interrupt key is pressed during copying, the master Q
Notify the IOl that the interrupt key has been pressed (steps 51218, 51220).

When the cassette selection key (key for selecting either upper cassette, lower cassette, or deck) is pressed, the selection process is repeated 1J (steps 51222 and 5).
I224).

When the copy magnification specification key is pressed, (;'X4
'Perform key processing (step 512213, 5+228
).

When a copy mode designation key (for example, a copy mode designation key 14, copy'q, and mote designation key) is pressed, the corresponding mode processing is performed (steps 5I230 and 51232).

The above shows the main routine on the slave side.

Figure 5 (3) shows the timer interlaced (T 1NT)
The processing will be explained. Here, an interrupt is generated by the interval timer every 1.248 milliseconds.

In step 51234, display processing is performed, and in step 51
In step 236, key manual processing is performed, and in step 51238, timer processing is performed. In this timer processing, a specified operation is performed after a set time.

Next, the serial interrupt (SiNT) shown in Figure 5 (4)
Explain.

Of the serial signals sent from master QIOI to slave Q102, the upper 4 bits are called status information, and the lower 4 bits are called data information (Fig. 7 (1) and (2).
) #Sho). In step 51240, this status information is loaded and the steps 51240 and 51240 are
After performing the processes shown in I242 to I51288, in step 51270, data to be transmitted next is set in the master QIOI. In other words, since serial communication is executed by exchanging data at the same time as described above, the slave side can determine the next transmission in advance.
Save the data you need to know. Thus, the master QI
When serial data is sent from OI, at the same time,
Data is exchanged.

FIGS. 5(5) to 7) show the display routine.

An outline of the display routine is shown below.

LABEL: DiSP Called at regular intervals based on input conditions/internal timer Output condition: [nccNT] +1.

Processing details: Displays the text, text, and text for each called item. The following is displayed inside the DGCNT.

The content of the display area is changed to [1GDA2~7] for each scan.
When the plink flag is set, it flashes every 800 m, sec.

In step 51274 shown in FIG. 5(5), the digit line by dynamic lighting is turned off. Also, in step 51276, the OP flag of 8 pins I (Fig. 5 (
(See DPFLG shown in 7). and,
If the "displayable flag" is set in bit b of DPFLG (step 5L278), step 8128
0 Performs the display processing shown below.

On the other hand, if the "displayable flag" is not set, all display is erased (step 51290).

When the display flag is on, step 3128
At 0, the digit counter DGCNT is loaded and the processes of steps 51292 to S12]8 are performed.

In step 91300, necessary digits are lit by matching the digit signal with the 7 segment signal.

In step 51302, the digit I counter is incremented by 1 for the next display, and when the digit counter reaches 8, it is cleared (step 513Q4).
, 7.7, ump513Q6).

After that, in step 51308, the subruchi 0P
CNV (see FIG. 5 (6)) is executed.

FIGS. 5(8) and 5(9) show output data for displaying 7-segment LEDs and their display form. Here, "data" refers to 16 internal data 0
．． - means F. Further, the display rPJ is a display form when a paper jam occurs. In other words, when there are three sheets of paper left in the aircraft, "P3" is displayed.

Furthermore, if a serviceman call error occurs,
"E" is displayed.

Figures 5 (10) and (11) show key manual routines. An overview of the key manual routines is shown below.

Key manual routine LABEL: KEYiN Input conditions: DGCNT=O~7 Indicates the digit line being output.

When KYFLG b7 = 1, only the stop key and interrupt key are valid; when = 1, the key cannot be received. Output condition: Set key code KYFLG b, ←" l " to KYCOD (key right flag) Processing details: Chattering for 15 to 20 milliseconds.

If 2 or more keys are pressed, ignore it, and set all keys to O.
After becoming FF, I will manually create a new key.

In step 51324 shown in FIG. 5 (11), it is determined whether bit bl of the key flag is on or off. That is, if the key processing at step 111 in this processing program has not yet been completed, the next key cannot be set, so the program skips to 5 and returns to 5 when the focus is on.

Also, if no key has been entered previously, step 5132
Input the key at B.

In step 51328, it is checked whether the key read in step 51328 exists or not. If there is, bit b7 of the key flag is checked (step 51330'). That is, only when the flag (bit b of KYFLG) indicating that only the stop key and interrupt key operations are valid during copying is set, the key presence flag is sent.

Below-1- is the processing program to be executed by the slave Q102.

FIGS. 6(1) to (11) show processing programs to be executed by the pedicle controller QI03. This petistal controller Q103 (see Fig. 3 (1) ((Q
) is for controlling during both 1n1 copying and deck paper feeding.

In step 51338 shown in FIG. 6(1), the CPU
The serial data is checked in step 51338. That is, the contents of the serial communication take sent from the master QIOI are checked.

At Step 7'51340, a manual routine for the sensors included in the Heticle Control I/Roller Q103 is executed, and at Step 5I342, the status of the deck paper feed is sent.

In step 5I344, the paper feeding status of the intermediate tray is set, and in step 5I348, a main body door open check is performed. That is, the Betistar controller Q103 checks that the door of the main body has been opened due to the 24V drop.

Steerer 7" 31348 performs a pom check on the intermediate tray. In other words, it is unclear where the paper size control plate 56 (see Fig. 1 (1)) of the intermediate tray 59 is located when the power is turned on, so - After returning to the pomme sensor position, move according to the paper size.

In the tincture A lowering routine shown in step 51350, the teraki lifter 54L (see (+) in FIG. 1) is moved up and down.

In steps 51352 to 51362, the statuses 5TSO to 5 used for sequence control are entered, and the process branches to steps 51384 to 51374.

In the stand/wait loop shown in block 51384, the machine waits for the copy button to be pressed from the main body.

Step 513f! 8, in the double-sided copy mode, ``Perform copy processing of the main side.''

In step SI'368, "back" copying processing is performed in the double-sided copying mode.

In step 51370, deck paper feeding is performed.

In step 51372, the duplex copy mode "falls"
Depth paper feeding is performed during double-sided copying.

In step 5I374, when performing back three-sided copying in the double-sided copying mode and discharging the paper from the discharge port of the main body, the transfer paper is reversed.

N\6 Figure (2) i: The EXTiNT (external = -y't) shown issues a request when communicating with the master QI01. Is that a request?Q1
03, and this processing program is executed.

Bedicle controller QI03 is a mask Qll)I
Since communication is performed in synchronization with the serial clock from the controller, first, in step 51376, the mode is switched to the external clock mode. Next, in step 51378, data to be sent from the pedicle controller QIQ3 to the master QIOI is set.

In step 51380, open Torikage).
In step 51382, Pedi 7 Tarcontre o - La Q
As soon as the preparation for sending I'03 is completed, the master QIOI
Send Hayenable.

In the event old 1j inclusion process shown in FIG. 6 (3), the clock of the intermediate tray 5G is set to the pedicle controller Q1.
03 to the included terminal of the event timer.

In Step 5I384, the tray counter is decremented by 1 every time there is one Cronk. And Stenbu 5I38
At 8, set the event:-counter to rlJ. As a result, an inclination occurs every other time and counting is started. That is, this means that an interrupt is generated for each clock pulse sent from the encoder attached to the motor shaft of the intermediate tray.

FIG. 6=<a In 5, the serial data is checked.

In step 51388, it is checked whether serial communication from the mask QIOI to the petistal controller Q103 has been completed. If communication is complete, in step 51380, the enable to the master QIOI is reset.

In steps 91392 to 3139B, master QIO1
4 sent from to pedestal controller Q103
It is determined whether or not any of the various communication data (see (1) in FIG. 9) has been sent from the master Q101. Then, each data is set depending on the contents (steps 51402 to 9140B).

81398).

In step 5I400, the sequence timing clock is increased by one. That is, in order to control the desired serial timing using the timing of the drum clock, the clock to be used is counted and amplified in the Stella 7'51400.

Figure 86 (5) shows the deck lifting and lowering routine.

In step 91408, it is determined whether the deck door is opened or closed. If the deck door is open, a deck lift door amp/down request is set in step 51420 to replenish transfer paper. As a result, data indicating that the deck lifter 54L is to be lowered is set in the mask Q101.

The deck lifter 54 responds to the signal from the master QIOI.
L is lowered (step 51422.+424), and in step 3142B, lifter 541. Check to see if it has fallen to the lowest position. - Lifter 5.
When 4L is lowered, the motor of lifter 54L is stopped at step 51428.

Also, when the deck door is closed (step 81408), a request is made to run the deck leaf door "'tsubu/)" in step 51410. Then, when the deck is allowed to be raised, Raise the deck (steps 51412, 51
414).

In step 91416, it is checked whether the lifter 54 has been completely raised. And step S+41
8 stops the lifter 54L from rising.

FIG. 8 (8) shows a standby loop. Here, branches to each status that should be executed after the copy start button is pressed are shown.

FIG. 8 (7) shows the processing procedure during "front" self-reproduction in double-sided copy mode.

First, in step 51450, the intermediate tray 5f
The control board 5B (see FIG. 1 (1)) is moved according to the paper size.

In step 51452, it is checked whether the movement is complete. Once the movement is complete, step 51454
Set the intermediate tray ready signal at As a result, as shown in FIG. 8(2), the "intermediate tray ready" signal □ of Syriano 1 data to be transmitted from the pedestal controller Q103 to the master QIOI is set. Then, the main unit starts copying and proceeds to step 514.
At step 58, check the completion of "front" self-recovery.
0 When the transfer paper is sent from the main body side to the intermediate tray 59, control is transferred to status 5TSO in step S14-8, and the process returns to standby loose.

FIG. 6(8) shows the processing procedure during "back" self-reproduction in double-sided copying mode. Here, processing for feeding transfer paper from the intermediate tray 58 is performed.

First, in step 8148B, it waits for a "paper feed request" (see FIG. 8(1)) to be sent from the master Q101.

In response to the paper feeding request, a paper feeding operation is initiated (step 31488). When the feeding of the set number of sheets is completed (step S14?Q), the process returns to standby loose again (step 51472).

FIG. 8(9) shows switchback processing. This switchback process has already been described in detail in FIG. 1(3), so its explanation will be omitted. Then, after the switch blowout ends, it returns to standby loose again (step 61484).
.

FIG. 6(10)r shows the deck paper feeding loop.

First, step 51474. Figure 9 (1) Reference 1
jl(,) ,,Start paper feeding operation (step 5I4
76). Thereafter, when the set number of sheets have been fed (step 51478), control is returned to the standby loop (step 51480).

Figure 6 (J]) is De Nki 54 (see Figure 1 (1)).
The processing procedure for feeding paper from the front side and simultaneously copying the "front" side in double-sided copying mode is shown below.

First, in step 51480, the control plate 56 of the intermediate tray 58 is moved, and in step 51482, the completion of the movement is checked.

In step 5I484, the "intermediate tray receipt" signal is
(see FIG. 9(2)) is sent to the mask QIOI (step Sl 484). Next, in response to the snoring request from the master QIOI, paper feeding from the deck 54 is started (step 51488).

Then, when the copying of the “front” side is completed (step 5
1490), and returns the control to standby loose again (step 51482).

The processing procedures to be performed by the pedicle controller QI03 have been explained above.

FIGS. 7(1) and (2) show serial data sent from master QIOI to slave Q102.

Here, of the 8-bit serial data, bits 1-4 are used as status structure, and the lower 4 pins are used as data.
It is sending various types of communication data. For example, bit b0 of status O (state status) indicates whether the power is on/off, bit bl indicates whether the wait is completed or waiting, and pin l-b indicates whether the master side is ready or NOT.
Lady or bit b.

indicates whether the master side is abnormal or normal, corresponding to each focus.

Also, status 9. ^, D, and E are slave Q1
This is control data for the output port of No. 02, and by locating the output port near the load, the number and length of control lines can be reduced.

Figure h'C8 shows 8-pin serial data sent from slave Q102 to master Q101. here,
The 1st and 3rd bits are used as a status structure, and the 5th hint is used as data. For example, looking at the data at the top of this figure, the top three points indicate the focus or status 0, the bits bo and bl indicate the J interleaf cassette, and the bits l-b indicate the auto shunt off (i.e., the status of 0). A function that automatically turns off the power if no operation is performed within a certain period of time), Byl'b, presses the keypad key, and B4 presses the old key. .

FIG. 9(1) shows the serial transmission data sent from the master QIOI to the petistal controller Q104.
FIG. 1 (2) conversely shows serial transmission data sent from the pedicle controller Q104 to the master Q101. These serial transmission data are transmitted in synchronization with the tram clock during copying.

Incidentally, the A/D converter Q104 counts pulses at this timing in the single-sided copying mode or when the deck paper is fed, and performs 71 pulses in the sequence system 1Jll.

ulOn shows a timing chart of serial transfer. As mentioned above, during the Copy Turino work, Master Q
From IOI to pedicle controller g+03,
Serial transfer starts at the same time as the drum clock.

The -1 side of the figure shows the timing of the counter, internal timer, and l/ram clock.

When copying is not in progress, the pedicle control controller Q103 synchronizes with the internal fop and timer pulses.
communicate with. Also, master QIOI and slave Q10
In between communication with 2, pedicle controller Q
103. ! : AI] + 7/< -Evening Q104. ! l
: ノ1lliii, 1 is 11 times. The communication interval is 4.992 milliseconds and 19.96 milliseconds, as shown in the figure.
It is 8 seconds.

During cohering, the pedicle controller Q103 communicates in synchronization with the drum clock (see bottom of the diagram)
.

As already explained, FIG. 11 shows the master QIOI and the slave 0102. He-F” Istal Controller Q10
3.

A communication line with AD converter Q104 is shown.

Each of these QIOI NQs 104 is provided with an 8-bit shift register, and only the shift register is shown here. These shift registers are connected to the serial clock SCK from the master QIOI.
operates in sync with. Also, the data output from the SO terminal of master Q10'1 is input to each Sl terminal, and at the same time, one bit is sent to master Q from each SO terminal.
It is introduced into the Sl terminal of 101. In this way, data is exchanged simultaneously.

Figure 12 shows the serial clock SCK and serial out S.
The timing between O and serial in SI is shown. Here, data is output at the rising edge of the serial clock SCK, and data is input at the falling edge of the serial clock SCK.

FIGS. 13(1) to (4) show sequence control diagrams of this embodiment.

FIG. 13(1) shows the control timing from when the power is turned on until the standby state is reached. That is, when the power switch is turned on and the fixing heater reaches 150° C., the main motor rotates at a low speed. Thereafter, when the fixing heater reaches 170° C., the main motor rotates at high speed (main motor high), and rated potential control is performed.

In addition, Figure 13 (2) is a copy of an A4 chair (1 A4 size copy, AE, within 1 minute), Figure 13 (3
) is a reduced 1-sheet copy (AE) after A4 size copying,
FIG. 13(4) shows the sequence timing when double-sided one-sheet copying (manual exposure) is performed when paper is fed from a deck. Since the control in each of these operation modes is clear from the drawings, a description thereof will be omitted.

(Effects) As explained in Section 2, according to the present invention, even if double feeding occurs during self-reproduction in the "down" mode, the transfer paper corresponding to the double feeding is automatically ejected to the non-sort bin, etc. , it is possible to obtain a double-sided copying machine with improved operability.

[Brief explanation of the drawing]

1 (1) to (3) are block diagrams showing one embodiment of a double-sided copying machine to which the present invention is applied; FIG. 2 is a plan view showing the entire operation section of the double-sided copying machine in FIG. 1; Figures (1) to (3)
is the control circuit diagram of the double-sided copying machine in Figure 1, and Figure 4 (1) is the control circuit diagram of the double-sided copying machine in Figure 1.
) to (78) are diagrams showing the control procedure of the master QIOI shown in FIG. 3 (1), and FIG.
) Figure 6 (1) to (11) are diagrams showing the control procedure of the pedicle controller Q103 shown in Figure 3 (1), Figure 7 (1)
and (2) are diagrams showing serial communication data from master QIOI to slave Q102, and FIG.
9 (1) is a diagram showing serial communication data from master fJ101 to pedicle controller Q103, and FIG. 8 (2) is a diagram showing serial communication data from pedestal controller Q103 to master QIOI. Figure 1θ is a timing chart of serial transfer, Figure 11 is a diagram explaining communication control performed by the master QIOI, Figure 12 is a diagram showing serial communication data to
This figure shows the synchronization of the serial clock SCK, serial out SO, and serial in Sl in FIG. 11, and FIGS. 13 (1) to (4) are sequence control diagrams of an unimplemented example. DESCRIPTION OF SYMBOLS 1... Photosensitive drum, 2... l1ij static electricity removal charger, 3... - formation charger, 4... Secondary charger, 5... Transfer charger, 6... Cleaning device, 7 ...Developer, 8...Aii exposure lamp, 9...Full-surface fog light lamp, 1°1, 12...Paper feed roller, 13..." single-stage cassette, 14...double-stage cassette , 16... Paper detection sensor, 17... Conveyance belt, 18... Paper detection sensor, +9-12... Solenoid, 20.21... Switch l<-ink sensor, 33-i
, 33-2... Flapper, 34... Original table crow, 40... Illumination lamp, 53... Separation roller, 54... Tincture, 5G... Paper size control board, 57.58. ...Conveyance path, 59...Intermediate tray, 62...Non-so] bin, 66...Sort bin, 70...Copy start key, 71...Stop key, 72...Interrupt key 73... ...One copy cent key, 75...Cassette/Tekk selection key, 76...Nature size copy key, 77...Enlargement copy key, 78...Reduction copy key, 79...Automatic exposure (AE) ) selection key, 80... automatic duplex selection key, 82-86... warning indicator, 87... one copy indicator, 8th... interrupt indicator, 89... standby indicator, 90...[Fall J copy display LED, 91...
"Back" copy display LED, 88...Paper jam position indicator, 88...Indicator to indicate that there is paper in the intermediate tray 58. QIOI...Mask, QI02...Slave, Q103...Pedicle controller, QI04...
...A/D converter for temperature control of fuser heater, 0105~l;l l Q7...Extension I10, Q1
08. Q109...Other Prosensors, 100.
・・Body, 140-1 ・・Tinki No. 92844, 140-2・
...Inverter, 140-3...Heater on signal, 140-4...And-ka-1, 200...Pedicle, 300...Automatic document feeder (ADF), 400...
- Sorter, 800... Guinamink display section, 802... Warning lamp display section, 805... Potential control section, 806... High voltage control section, 807... A E Al11 constant control section, 808...・
Exposure lamp control section, 820...Main motor 1 ( ) 21st section, 823...
・Blank haze light control jha1δ11.829...Jam detection paper sensor, 831...Tincture, i+Iii side right edge sensor. 836...Fuser heater, 838...Drum clock, 850...Fuser thermistor, 860...Deck paper feed control section, 861...Tincture up/down control section, 862...Deck paper size manual section , 863... Intermediate tray conveyance system control section, 864... Intermediate tray paper size control section, 865... Intermediate tray paper feeding control section, 880... Non-sort control section. S4-51492...Control step. Special Applicant: Canon Co., Ltd. (2) Figure 4 (3) Figure 4 (16) (17) Figure 4 (21) Figure 4 (27) 41st General (28) Figure 4 (29) Figure 4 (37) 4 Figure (41) Figure 4 (42) (431 (44) Figure (46) Figure 4 (49) (501 Figure 4 (511f52) Figure 4 63) (54) Figure 4 (58) Figure 4 (59) (60) Fig. 4 (65) (66) (67) Fig. 4 (68) (70) Fig. 4 (71) (72) Fig. 4 (73) (74) , 1) 5th Figure (2) Figure 5 (8) Figure 5 (9) Figure 6 (4) Figure 6 (5) Figure 6 (9) (10)

Claims (1)

[Claims] In a double-sided copying machine equipped with an intermediate tray that temporarily stores the transfer paper that has been copied on the first side, if double feeding of the transfer paper occurs when copying the first side, the intermediate tray is stored. A double-sided copying machine characterized in that copying of the second side is continued until the number of copies reaches zero.