JPS58179859A - Image forming device - Google Patents

Abstract

PURPOSE:To form a stable timing signal for image formation with simple constitution by generating pulse with a rotating member in synchronization with a rotating body formed with an image and controlling the timing of sequence control according to the counting of the pulse. CONSTITUTION:A disc provided with many apertures to be detected optically is turned at a speed higher than the speed of an insulation drum to be formed thereon with a secondary latent image in synchronization with the insulation drum by means of a motor for the insulation drum. The pulse for each one rotation of a screen drum to be formed thereon with a primary latent image is generated according to the optical detection thereof and a clock pulse CPU is thus generated. 359 pieces of such pulses CP are counted with a counter formed of 4 pieces of FFs for the digit of the 1st place, 4 pices for the 10-th place and 2 pieces for the 100-th place, total 10 pieces. The pulses are decoded with a prescribed matrix circuit using diodes, whereby the timing pulse for the rqquired control signal is obtained. The stable timing signal in the stage of the sequential control of image formation is generated with the simple constitution requiring no switch or the like.

Description

[Detailed description of the invention] The present invention relates to an image forming apparatus.

Conventionally, it is known to perform sequence control for image formation by counting pulses.

In this case, the pulse generating means for generating pulses senses the motor gear or reads marks or perforations on the photosensitive drum or belt, so it is structurally complex and large.

The present invention eliminates these disadvantages.・ Examples will be described below with reference to the drawings.

FIG. 1 is a sectional view of the copying apparatus of the present invention, and the mechanical configuration thereof will be described below. The three-layered screen photoreceptor (FIG. 16) has ring-shaped ends, which are connected by a connecting band and stretched with adhesive or the like to an integrated metal screen drum body. It is installed on the screen drum shaft 2 of the screen drum. Also, in consideration of the application of bias voltage, screen drum 7 flanges made of an insulating material are fixedly fixed to both ends of the screen drum 1 with screws, etc., and the front of the screen drum flange is provided with a modulation band II device 11. It has an opening so that the pre-charger 13 can be installed inside the screen drum l. The screen drum 7 langes are attached to a fixed tubular screen drum shaft 2 via ball bearings. The screen drum IFi is rotatable around a fixed screen drum shaft 2.

The screen photoreceptor of the screen drum 1 is constructed by laminating a photoconductive material 70 having a large number of micropores, a photoconductive member 71, and an insulating material 72 so that one surface of the conductive material is exposed. . The above-mentioned conductive member is made by laying metal xs+bond of stainless steel, nickel, etc. in a net shape. In terms of the mesh value Fi of the conductive member for copying, a book with a mesh value of 100 to 400 and an aperture ratio of 50% or more is suitable. The photoconductive member is formed by vapor deposition of S@gold, etc., spray coating with a dispersion of an insulating resin containing particles of CdS, PbO, etc., etching, etc.

The above-mentioned insulating member is prepared by spraying or vacuum deposition using a solvent-based organic material such as epoxy resin, acrylic resin, or silicone resin. Further, it is possible to create a conductive member on one side by coating or spraying one side of the conductive member with +7 or by grinding the member that has been penetrated by 161.

Around the screen drum 1, there are other devices necessary for forming electrostatic latent blue on the screen photoreceptor.

A light emitting lamp 3 is provided to eliminate undesirable ghosts on the screen photoreceptor, and a light emitting lamp 3 is provided in the primary zone 1.
gives a uniform electrostatic charge on the screen photoreceptor. Since the diameter of the screen drum is relatively small, the front end of the image is already static IN, while the electrostatic ff11m is being formed on the screen photoreceptor.
Even though a T'IF image has been formed, it may be charged again. Therefore, the primary charger is divided into four parts and the same voltage and current are applied to each part with a time interval. A.C.
The static eliminator 6 is the document irradiation lamp S! 11. on the photoreceptor according to the light source 5 of the original irradiated with. Provided to eliminate static electricity from M. Further, as a substitute for the AC static eliminator, a DC static eliminator with a primary band of 1M and reverse polarity may be used. The entire surface exposure lamp 7 is used to increase the contrast of the primary latent (e) of the screen photoreceptor.Also, it is placed close to the screen drum l, keeping a small distance rl, and deposits @casting layer on the conducting embryo material. Insulating drums 8 coated with WIi are arranged in parallel.The screen drum 1 rotates in the direction A of the arrow, and the insulating drum 8 rotates in the direction B by the same amount.

Inside the screen drum 1, a rail IOK modulation charger 11 was supported on an insulating block 9 facing the screen drum 1 and closest to the supply/distribution insulating drum 8. Pre-modulation chargers 13 are attached to the rails 12, respectively.

In addition, dust adhered to the screen drum 1, causing primary latent scratches and 2
In order to avoid any hindrance to the formation of the next submissive relationship, the blower 14 was damaged! 515, the floating dust is made to adhere to the pack plate 16 of the discharger, and clear air is blown onto the screen drum 1 from the static elimination nozzle 17. Furthermore, if the screen photoreceptor has a low temperature or a high immersion degree, the air being blown may be heated by the heat source 18. When the primary latent image on the pre-modulation charger 13t'i screen drum l carries a large number of secondary flJ flights, the potential of the first order m is kept constant from beginning to end, and the modulation charge 411 has a reverse polarity. It is used to apply a voltage of .

The secondary latent image on the insulating drum 8 is exposed by a developer 20. The developing device 20 includes a toner replenishing device 22 and is separated from a developing section 24 by a partition plate 23.
5 is the current keyaki device 2 due to the rotation of the toner distribution roller 26.
Sent within 0.

The toner 25 for current use is sufficiently stirred by the rotation of the stirring roller 27, and the sleeve 29 placed inside the magnet 28 tube
Develop the electrostatic latent image on edge drum B by $.

The paper feed tray 30 can load copy papers in large quantities (2000 to 4000 sheets), and so that the topmost copy paper 31 is always at a constant position, the top position is detected and the lift motor is activated to compensate for the amount of paper that has been reduced. is moved up along the guide rail 32 by the drive of the guide rail 32.

The copy paper is fed out from the top of the paper by the big up roller 33 so that the developing pattern and fl on the insulated drum 8 match, and then by the timing roller 34, the 11 images on the insulated drum 8 are fed out. K11 to match
The image is then transferred by the transfer roller 35 to the fI image-soaked copy paper on the insulating drum 8 by the transfer charger 36. (The separation charger 9I37 separates and conveys the copy paper from the dome 8 using the insulated drum 8 and the copy paper conveyance belt 8.The conveyance belt 38 is stretched around belt drive rollers 40, 41, and 42, and the The rotation of the copy paper further rotates, and the copy paper is conveyed while sucking it.The conveyor belt stretched around the rollers 43 and 44 sends the copy paper to the fixing roller 45.
4 IN, and the copy paper is received by a tray 47 along a guide 46.

(Explanation of operation specifications of the key operation panel) The operation of the charging IIIXF of the present invention is performed using the operation panel 6 of FIG.
This is done by command from 1. The operating board 61 includes two indicators 62, 63, two pilot lamps 65, 66, and a keyboard 64. The key "0" (0RIGINAL) on the keyboard 64 is used to set the number of electrostatic latent images to be formed on the screen drum 1. When the numerical keys are pressed, the contents of the pressed keys are entered in the display 62. Also, if the "ω" key is pressed after the numerical key is entered, the contents of the display 62 are cleared and "ω" is pressed.
The pilot lamp 65 is turned on. Conversely, if the numeric key is pressed after the "■" pilot lamp is lit, the pilot lamp is turned off and a numeric value is entered on the display 62. That is, the numerical data and the "ω" command are automatically switched. In addition, "■" indicates the operation,
This is to be performed indefinitely until the rsTOPJ command (described later) is received.

Next, the key rRJ (RETENTION) is used to set the number of copies repeatedly obtained by one electrostatic latent image formed on the screen, and the entry of the numerical key or Fi "■" key is "0". This is the same as for the key, and its contents are displayed on the display 1663 or pilot lamp 66. For example, <123> on the display 62,
To enter <456> on the display 63, the key operation is "0" → "1" → "2" → "3" → rRJ → "4"
→ “5” → “6”. Therefore, "0" to "9"
The numeric keys up to and the "ω" key can be used with two functions.
Switch between keys rOJ and rRJ and display 62 on 27.
．． 63° or pilot lamp 65.66 can be entered arbitrarily. Of course, either the "0" key or the "R" key may be specified first.

Next, the rcOJ (CLEAR0RIGINAL) key is used to clear the display 62 or pilot lamp 65, and is used to correct incorrectly entered numerical data %. Therefore, <123> appears on the display 62.
If you want to correct the entry as <456>, enter "CO" → "0" → "4" - r5J- + r6J # r
OrcRJ (CLEARRETEN)
TION) There is one key for the same purpose, and the display 63
Or Clear the Pilot Lamp 66 Or 5TART J Keylo Used when starting a copying operation, but when the contents displayed on the display 62.63 and the pilot lamp 65.66 are in an unreasonable combination. 5TART J key Fi plow does not work. The unreasonable combination is when the content of the display 62 is <000> and when both the pilot lamps 65 and 66 are lit. The reason for the former is that it is impossible to copy without forming an electrostatic P image on the screen/drum at least once, and the superior reason is that it is impossible to make a copy without forming an electrostatic P image on the screen/drum IK once. This is because it is impossible to perform an infinite number of retentions each time.

Furthermore, once the r 5TART J key is activated and the copying machine starts driving mJfA, keys other than r 5TOP J will not operate due to a later-described inhibition circuit.

Father, if <003> is entered on the display 62K<002>, 63, after the primary # image is formed on the screen drum,
By repeating the modulation, scratches, and transfer with Mitaka and repeating this cycle again, six copies are obtained. At this time, when the r5TART J key is operated, the two displays display <000>, and as the copying operation progresses, they display <001><OO2>--.

(Description of operation panel circuit configuration) FIG. 2 is a block diagram of the operation panel circuit according to the present invention. Memory 202. The counter 201 corresponds to the display 62 and stores and counts the number of electrostatic latent memories formed on the screen drum. Memory 203. The counter 204 corresponds to the display r463 and is used to store and count the number of copies to be made in one primary infiltration. These counters 201 and 204 can be a screen drum counter or an insulated drum counter, which will be described later.

To explain the circuit operation, 217 to 221 refer to a group of keys on the operation panel, and the signals of these switches are gated by the output signal 214 of the inhibit circuit 216, and this signal line 214 is normally at the @l'' level, When the inhibit circuit 216 is activated, the level becomes 10'', and no output occurs even if a group of keys is operated. ◇The drop and acid 1 path 216 is composed of flip-flops 209, 210° 211 and two OR gates 222 and 223. . Each of the above 7 rib flops is r 5TART
0 Clip flop 20 that remembers that the J key was pressed, r S1'OP J key was pressed, paper jam 9, two sheets of paper were fed, there was a jam such as #t's incorrect interval.
Both 9 and 210 are never set, and one is (-
0f D 5TART
The command and the 5TOP command do not work at the same time. Further, when the flip-flop 211 is set, the flip-flops 209 and 210 are always reset, and all operations are interrupted when a paper jam occurs. OR getter 222°223
Their outputs are normally at the @18 and @olJ levels, respectively, but when any one of the clip flops 209, 210 and 211 is set, these are inverted to the 10'' and @l'' levels. i.e. rsTARTJ key, r 5
When either the TOP J key or JAM detection is active, Kento East circuit 216 is activated and signal 11214 is @
0'', and the signal line 215 becomes @1''. Therefore, at the same time that the keys 217, 218, 220, 221 on the operation panel are disabled, the gates 225, 226 are closed, and the keys 224, 22
7 opens and displays 662. The display 63 has a memory 202. The contents of the floater 201 and the counter 204 are displayed, replacing the contents of the memory 203.

During the copying operation, Vi does not work except for the r, 5TOP, and J keys. Therefore, the instant the r 5TART J key is activated is the end.The counter is zero, so the display shows 62 digits <00.
2>→<000>, 63 becomes (003>→<000>. However, as the copying operation progresses, this value is counted up, and the corresponding memory value and the counter value become equal. When all copying operations are completed, each counter is cleared to zero in preparation for the next operation, and the displays 62 and 63 again display the numerical values in the memory.

If the 5TOP J key is pressed at any point during the copying operation, the operation will end at a convenient point in the process from that point on.Next, the flip-flops 205 and 206 will each
0" key and "R" key are pressed, and neither of them will be set, but if one of them is set,
Be sure to reset the other one.

Now, when the "0" key is pressed, 7 lip flops 205
is set, gates 228 and 229 open, and then when either number key #217 is pressed, gate 2 opens.
28 and the value is stored in memory 202. At this time, if the sipilot lamp 234 is lit by the flip-flop 207 which remembers that the "a:T" key has been pressed, it is reset by the signal 11232 and the lamp is turned off. Also, numeric key details 2170s 9K "■
” key 221 is pressed, the gate 229 is turned on, the flip 7a knob 207 is set, the pilot lamp 234 is lit, and at the same time the memory 202
If there is any numerical value in it, clear it with signal @233. Therefore, the entry of a number into memory and the
ω'' commands are never satisfied at the same time; if one is true, the other is always not true.

Furthermore, when the "R" key is pressed, the flip-flop 205 is reset, the flip-flop 206 is set, and the gates 230 and 231 are opened. Below, the above rO
As with the J key, the value for key group 217 is ter)2
31t - To the memory 203, the rct5J key sets the gate 230 to 4 reflip-flops 208, and lights the pilot lamp 235. This too,
If memory 203 is entered, 7 rip 70
By resetting the knob 208 and setting it in the opposite direction, the memory 203 is cleared, and therefore the numerical data entry into the memory and the "■" command are automatically switched.

In addition, the 2M memory 202. Input can be entered into the memory 203.

(Relationship between sequence and machine operation) t43 Figure 1 This is a time chart showing the operation sequence of the copying machine in Figure 1, when the command from the operation panel is 0RIGINA.
L<002>RETENTION<002
> is the case. First, at the same time as the power source switch is turned on, a cleaning motor 320. Screen dust collector 15 (Figure 1).

The screen dust prevention fan 14 (@Figure 1), the two screen/heaters 18 (Figure 1), and the dust collector fan 325 that sucks the toner floating in the printer start operating, and the power switch is turned on. continues until turned off. However, one screen heater is turned off when the first electrostatic latent formation is completed.

Next, when the % copy start r5TART J key is pressed, the screen drum motor 301 rotates.

At this time, the reciprocating clutch of the optical system is activated, thereby driving the optical system synchronously with the screen drum. 1st
To explain the mechanism of the optical system in the figure, the original on the original glass is illuminated by the original illumination lamp 52, and the first reflector 53, which is installed integrally with the original illumination lamp 52 and the lamp reflector, illuminates the original on the original glass.・Moves at a speed V that is mutually synchronized with the circumferential speed of the drum 1. By illuminating the original illumination lamp, the light beams obtained through the brush 1 reflection mirror 53° @ 2 reflection mirror 54, and the lens 55. Furthermore, a third reflection mirror 56 fixed to the lens house. Fourth reflection mirror 5
7. After passing through the fifth reflecting mirror 58, the screen drum l
to project. The second reflecting mirror 54 moves in the same direction as the first reflecting mirror 53 at a speed of 1/2V. In this case, the first
The cam plate attached to the first reflection mirror mount where the reflection mirror 53 is installed is sequentially activated by a micro switch (MSI).
~MS6) It moves while fully operating.

The home position of the optical system is at the MSl position, and now r 5
If the optical system is not in that position when the TART J key is pressed, the optical forward clutch 302 (see Figure 3) is turned on, and the screen/drum motor 301 is driven to the optical system, returning to its home position. Shift to injection MSl, clutch 3
Turn off 02.

At this time, if the screen drum is not at its drum home position, it will wait for that moment. When the home position of the optical system and the home position of the screen drum match, the optical double-acting clutch 303 is turned on, the force of the screen drum motor 301 is transmitted to the optical system, and movement begins.

Also, at this time, the original illumination lamp 52 (304 in FIG. 3) is turned on. The cam plate that moves together with the first reflecting mirror 53 is M
Moving from SI, the front part of the primary charger 4 is turned on at 0M83 where MB2 is activated but electrically cut off, and further the rear part of the primary charger is turned on at MB4.

At the reversal position M82 of backward movement and forward movement, the optical backward movement clutch 303 is turned off, the optical forward movement clutch 302 is turned on,
At the same time as the movement of the optical system is reversed, the AC static eliminator 6 (308 in FIG. 3) is turned on. Again, MB4. It operates in the order of M2S, but is electrically cut off. Go further, MB2
to end the charging of the primary charger (front), and the primary charger (MB2)
to finish charging the primary charger (rear). When the optical system advances further and returns to the home position Mal of the optical system, the optical forward clutch is turned off, stopping the optical system and simultaneously turning off the original illumination lamp 52.Furthermore, from this point on, the timer starts operating at a constant rate. After a certain period of time, the AC static eliminator 6 turns off.0 After that, when the screen drum comes to the home position,
The screen drum motor 301 is turned off and the insulated drum motor 328 is turned on. Therefore, as is clear from the figure, the formation of latent scratches is completed after two printings of the screen drum. @, The external EMS 7゜MB8 for this process is equipped with a safety device that will stop the machine if the machine runs into an auto run.Insulated drum motor 32
8, the screen drum and the insulating drum, which rotate at about twice the speed of the screen drum motor 1, are engaged with each other through gears, and the screen drum and the screen drum motor, and the insulating drum and the insulating drum motor are one-piece motors.
Since they are connected by a way clutch, both drums rotate at the circumferential speed while the screen drum motor is driving, and when this is turned off and the insulated drum motor is turned on at the same time, both drums instantly rotate. Approximately twice a[
Climb up around you.

During the IO1 rotation of the screen/drum motor 301, the front irradiation lamp 3. The entire surface illumination lamp 7 is turned on and the optical cooling fan 326 is driven to prevent heat from accumulating in the optical system due to the illumination of the document illumination lamp 52.

Also, at the same time as the r 5TART J key works, the powder image transfer charger 369 paper separation charger 37. The PI edge drum static eliminator 50 and paper separation suction fan 319 (FIG. 3) are turned on and turned off at the end of the copying operation. However, since the above-mentioned charging i36, 37°50 is the circumferential speed of the screen drum motor and the rotational speed of the insulating drum is slow, the potential is lowered to prevent excess charge from being charged on the insulating drum (the third
Figures 317, 318, 321).

Next, after the formation of the first latent flaw, the screen drum motor is turned off and the insulating drum motor 251 is turned on, thereby starting copying operations such as modulation, one sheet transfer, and one separation. Weird 1
At s[lK, the first sheet of copying is completed when the scree 7/drum rotates three times, but after that, one sheet of copying is completed every time the scree 7/drum rotates four times.

To explain with reference to FIG. 3, first, the drum rotation is switched to the insulated drum motor 328, and at the same time, the first modulation pre-charger 3
10 and conveyor bell) 38 (tjg1 diagram)
The transport row 2 clutch 316 for transmitting the motor 3200 force is turned on. As the rotation progresses and the screen drum advances 806 from its home position, the modulation charger 311 for transferring the electrostatic latent formed on the screen drum to the insulating drum is turned on, and the voltage is supplied at 310'. The paper feed roller clutch 314 for feeding one sheet of paper on the paper base is turned on, and furthermore, at 350', the developing motor 31 is turned on.
2, and a reversible toner bridge prevention motor 313 for stirring the toner staying in the developing device is turned on.

After the screen drum starts modulation, it enters the 2nd 01st rotation cycle, and #8 paper roller clutch 314 is turned off at position 3060, whereby the leading edge of the fed paper and the developed image on the insulating drum! Timing roller clutch 315 is turned on to align the leading edges of the S images. If the number of copies is one, the pre-modulation charger 310 is placed at the 80° position.

The modulation charger 1B 311 is turned off, but in this case there are two sheets, so it is not turned off. Proceeding further, the paper feed roller clutch 314 is turned on at 310″' to feed the second sheet of paper.

1st timing roller clutch 3 at 360°
Turn off 15. 9.30 people to the third rotation cycle
The paper feed roller clutch 314 is turned off, and the timing roller clutch 315 for the second sheet is turned on.

At 80'', turn off the pre-modulation charger 31O and the modulation charger 311. If copying one sheet, turn off the developing motor 31 at this point.
2 and the toner bridge prevention motor 313 is turned off.

At 360', the timing roller clutch is turned off to enter the 04th round rotation cycle, and at 80' the developing motor 312 and toner bridge prevention motor 313 are turned off. At 360', the insulating drum motor 328 and the conveyance drum are turned off. - Turn off the two-clutch 316 and end the retention cycle.

Separation pawl solenoid 329 (
73) in FIG. 1 works at the position shown in FIG. 3 by counting pulses from the time when the leading edge of the paper passes between the lamp and the light receiving element 70 (FIG. 1).

When all copying operations are completed, the electromagnetic brake 321 operates for a certain period of time to stop the drum from overrunning.

(Description of Sequence Control Circuit Configuration 94) FIG. 4 is a block diagram of the control section. External signals come from the keyboard that issues operation commands.

Detection signal of the home position of the screen drum, which is the start of the sequence, a signal from the pulse generator synchronized with the rotation of the insulating drum, and a signal that determines the timing of the formation of the next submersion 6
microswitch signals are input to the central control. The central control unit stores two memories based on these input signals.

Making full use of 3 counters, it makes memory 9 judgments and outputs appropriate signals to the Inter 7 chair section.

The screen drum home position is detected by the detection pulse 330 (-Fig. 3), which is detected by the magnet 68 on the screen drum and the magnetoelectric transducer 67 (Fig. 1).
Obtained every time you rotate. Judgment pulse (1) 3311d
After the electrostatic latent formation on the screen drum is completed and the optical system returns again to its home position MSIK, the home position of the screen drum is subsequently obtained. At the time when this judgment pulse (1) 3310 occurs, the spinning speed memory (1) 202 and the Suff blade counter 409
The motor for the insulated drum is started by determining whether they are equal and whether the 5TOP command is issued.
A flow chart of 0 or more decisions for determining whether to start the process of forming the next latent defect, or to restart the next latent defect formation, or to stop the screen drum motor and end the sequence. When displayed, it will look like Figure 5. The above decision was made by Kenji ■.

ol! indicated by ■, ■! If this flow chart is expressed as an electric circuit, it will look like Figure 6.

If the vertical busbar is defined as a column and the horizontal busbar is defined as a line, the control commands indicated by ◇ in FIG. 5 are connected to columns 601 to 604, respectively. Also, this signal is applied to inverters 605-6.
08 and connected to columns 609-612.

Lines 613-617 are connected with resistors to a power supply which must be at a level equal to logic level 11''.

For example, the condition O in Figure 5 is 0, where there is no r s'rop command, the high lot lamp l is not lit, and there is a numerical value in memory 2, so this can be expressed using the ring groove method. , @@-FSTOP-)'3co-IL-0
'become. So, try Ag2O.

By connecting diodes to each of 610 and 611 and line 615 in the direction shown in the figure, an AND circuit is formed and column 60
9,610.Only when 611 is @1” level, line 6
15 becomes the 11" level. In other words, the condition (2) is satisfied and the line 615 becomes 11" during running. -1 to 0~
The @ condition is output on lines 613-617. Furthermore, lines 613-617 are connected to inverters 618-622.
0 is reversed and lines 623-627KIII are inserted.
Columns 628-6 that intersect this line 623-627
30 is connected to the power supply EK with a resistor and a diode matrix is formed here again, the condition of "■ or 0" is established in the line 630, and only at 9 is @θ' level,
The output 644 of the inverter 633 becomes 1■+@'' according to the logical formula, and the above-mentioned conditions are satisfied, and the output becomes @1 level only during running.Therefore, this is the point of separation between the discrimination pulse (1) FJI and the operation. Screen drum Ho person position pulse D
If you pass it through HPt gate 638, the sequence will end.■
The memory circuit can be latched by issuing an operation command. In the same way, it is possible to issue the command signals of ■ and ■, and in the case of the signal of
The output of 0 is lowered as shown at 820. Now, when the condition ■ is satisfied and the ■ signal is obtained, the screen drum motor is turned off, the insulated drum motor rotates, the drum speed is switched to bird speed, and the disk 59 is moved in synchronization with the drum by the gear. Rotate. Then, a signal generated when a hole made on the circumference of the disk 590 passes through a gap between a pair of light emitting elements and a light receiving element 60 is extracted as a four-wave pulse 332 (FIG. 3). This clock pulse produces one pulse per ten revolutions of the screen drum, or 360 pulses per revolution. It is difficult to drill one hole per degree in a disk with the same diameter as the screen drum, so a separate disk is provided, and a gear is used to make the same rotation of this disk n times that of the screen drum.
The large number of disks is set to 1/n.

In the process after modulation in this device, this clock pulse is processed and used as a driving signal for the equipment.

In other words, in the process after modulation, as shown in Figure 3,
The first copy is completed after one and a half revolutions of the insulated drum, and from the second copy onwards, copies are made every half revolution, so the first step in sequence control is to make a half revolution of the insulated drum and one revolution of the clean drum. By doing this, the binary coded 360-decimal counter is activated depending on the clock pulse 332, and the control pulses 333 to 345 in FIG. 3 are output.

An example of a circuit that generates this control pulse is shown in Figure 7.
Inherit 10 lip-flops to generate clock pulses from 0 to
Create a 360-decimal counter that counts up to 359.

The first four 7-lip-flops represent the ones digit, and O~
A decimal counter that repeats counting up to 9, the next four flip-flops indicate the tens digit, a decimal counter that repeats counting from 0 to 9, the last two digits indicate the 100 digit, and a ternary It is a counter. However, when the count progresses from 0 and changes from 359 to 360, a reset signal is output from the color decoder, and all flops and 70 knobs become 0.
be made into Thus, every rotation of the screen drum is KO~
The control pulses 333 to 3450 in FIG. 3, which is a 360-decimal counter that repeats counting up to 359, are generated by decoding the output of the counter with the matrix circuit (decoder) in FIG. In addition, 3 in Figure 3
If it is desired to change the timing of the sequence 10 to 316, this can be done by arbitrarily changing the position of the diode of the decoder. For example, delicate adjustments such as paper feed tying, which cannot be adjusted using a combination of a micro switch and a cam, and the registration between the leading edge of the paper and the image forming material on the drum, can be easily made.

In Figure 3, for example, the pre-change charger 310 is turned on at 1 count in the first cycle, and if the number of copies is 1, it is turned off at 80 counts in the second cycle, and if the number of copies is 2, it is turned off at 80 counts in the second cycle. , it is necessary to select a control pulse to turn off at the 80th count of the third cycle.

The present invention consists of two insulated drum counters I as shown in figure Wg4.
The selection is made easy by counting the discrimination pulse palpitation using C and IC' and comparing the count value with the memory (2). 347 If the memory (2) that stores the desired number of copies is equal to the value of the counter, the on-note during that cycle is killed.Afterwards, this counter is stopped. However, for example, the timing roller clutch operates on the first sheet of paper for the first time in the second cycle.However, when comparing the top drum counter IC and memory (2), it is found that the timing roller clutch operates for the first time in the second cycle. ,
Since it is already equal to the memory 12), no operation of this clutch is performed for the second sheet of paper. Therefore, the present invention controls the on/off of the clutch by comparing the memory (2) with an insulated drum counter IC that counts up one count later than the counter.

In the case of Figure 3, the insulated drum counter IC matches the memory (2) in the 3rd cycle and stops counting, whereas the insulated drum counter IC' (ji) matches the memory (Z) in the 4th cycle. Match.

Therefore, in the wJ4 cycle, the insulating drum counter (l and (2)) coincide. The coincidence of these two counters means that it is the final cycle of copying, and the last time of the cycle, that is, the judgment pulse (2). Clear two colors/ri in time, and again screen drum counter and m (
# Check whether the memory (1) storing the desired number of formations matches, and if they match, issue a copy end command and stop the rotation of the drum. If they do not match, turn off the insulated drum motor and install the screen as described above.
Turn the drum motor, start exposure, and repeat the same sequence after forming the next layer. The 16th garden is a diagram showing an example of controlling the main body 111 of each device, 310, 312, 314, 3
15 is a paper feed roller clutch and a pre-modulation charger in FIG.

Developing motor, timing roller clutch, 160
is the amplifier that operates this, 169,170 is 79 Tsug 7
The gate of 0, 161,164°166.168 is.
In the inverter, 162 is a Nant gate, 163 is a NOR gate, and 165.167 is an AND gate. When each matching circuit determines that the counter IC, rc' matches the sheet value setting memo 9-(2), the on-pulse is stopped and the off-pulse is used to stop the equipment, and the equipment is stopped at a predetermined timing. ◇ Next, the case where the transfer paper jams will be explained (see Fig. 8).

If the paper gets jammed in the conveyance path, and the transferred paper does not separate properly and sticks to the insulated drum and moves, two sheets of paper are fed and the paper shown in Figure 1 is used to detect the jam. In , the light +169 and the light receiving element 70. A light source 71 and a light receiving element 72 are provided. When the leading edge of the paper passes the light source 69 (SGI
), the light receiving element 70 picks up the pulse before the clock pulse is generated, starts a jam counter, and when the leading edge of the paper passes the light source 71 (SGO), the light receiving element 72 decodes the output of this counter to generate a separation confirmation detection pulse. Make it output SDP. The count number of the detection pulses corresponds to the transport distance from the light source 69 to the light source 71.

Therefore, if the paper gets jammed in the conveyance path or cannot be separated, the paper will not be able to detect the light source 71 even though the separation detection signal is emitted.

Therefore, the jam signal JP is outputted by a circuit as shown in FIG. b.

In figure b, 81 is a gate and 82 is a flip-flop.O Also, using this counter, the separation claw 73 (@ figure 1)
The same decoder can output a pulse signal to create the timing for activation and activation.

Sequence control unique to the present invention after jam detection will be explained with reference to FIG. If a jam occurs, immediately stop the insulated drum motor suddenly using the electromagnetic brake and turn off all sequences, but do not turn off the power switch.
0 to enable repair and during repair 9 The counter display remains stationary while displaying the count at the time of the jam 0 When the repair is complete, press r again 8TART J key is the screen drum motor rotates, rotating the screen drum to its home position. Then, at the home position, turn off the screen drum motor and turn on the insulated drum motor. Since the electrostatic potential of the screen is maintained even during the jam repair, the sequence operation after the above-mentioned modulation is restarted.

The details of the timing are shown in Figure 9. In the sequence after modulation, the insulated drum requires one and a half revolutions (three revolutions of the screen drum) for the first sheet, so if P4 starts after a jam, , the insulated drum counters ICI and IC2 must be stopped and left at 9 to create the timing for the first sequence after modulation. For this reason (as shown in Fig. 9, prohibition time 1 and prohibition time 2 are set in the first cycle and second cycle of the sequence, thereby controlling the first sequence.Then, the insulating drum Counters 1 and 20 are counted up at the beginning of the Fi#3 cycle, and the subsequent sequence control is the same as normal control.

The following cases can be considered as jams. ■１
When the first sheet jams, Tsumasho Zetsuori Drum Counter 1
Jam when (IC) and 2 (IC') + memory Q), ■
Jam when IC=memory (2), ■IC'-memory (j
Jam when l).

The counter movement for restarting after 1 jam is shown below. However, the memory shall be 4.

In the case of (2), the count increases to IC and IC' from the s3 cycle. In the case of ■, IC' in the third cycle
is counted up, xc=xd, and the cycle ends at the end of @3 cycle. In the case of ■, even if it enters the 3rd cycle, it does not count up, @K at the end of the 3rd cycle
Confirm IC-IC' and end. For ■ and ■, the resulting trap ends in the same cycle, but the point of jam is
This is because the difference between (1) and (2) is caused by the difference in time between jams near the paper leading edge detector due to reasons such as "feeding two sheets more than once" and paper jams due to poor paper separation.

A sequence control method using inhibit times 1 (INHI) and 2 (INH2) will be described. In the sequence of restarting after a jam, the first sheet must be copied in any case, so in case of prohibition opening 1, the first sheet must be copied from 310 to 310 in Figure 3.
314 function is turned on at the appropriate timing03
15 is also turned on at the appropriate timing of INHI and INH2. In the next KINHI・INH2 time it is 3
Counter IC and memory (2) for 10,311
Compare the contents of and if they are already equal, turn off 3
14 is also not turned on if they are equal.

For cycles after INH2, the IC and IC' counters are controlled as described above.

Control is performed by comparing memory (2) with these two counters, similar to control in the normal case.

The circuit that generates the above-mentioned inhibit time signals INHI, 2 is as shown in Figure 8a, where 181° and 182 are 7-rig flops, 83 and 184 are tars), and FR8TRT is a start signal for starting the simultaneous rotation of the insulating drum. The signal, FJ, is the judgment pulse (2), and the gates 183 and 184
Output INHI, 2 by typing as shown in the figure. The driving of the equipment and the stopping of the counter during this prohibited time are controlled by a circuit as shown in FIG. On in figure.

The off pulse is the same as the sequence pulse in FIG.

The control of the sequence after the latent flaw modulation described above uses the same method as the judgment flow shown in FIG. 5 and the judgment circuit shown in FIG. As is clear from the foregoing description, each cycle after modulation corresponds to one cycle of the 360-decimal counter that counts clock pulses. The pulses 34 to 45 in Figure 3 are fluorinated at the appropriate number of counts in each cycle, but they are not used all of them, but only in cycles where conditions are high, and the latching flip-flops of the related equipment are used. By turning on or off, it is possible to create a flow that loops the 360-decimal counter from 0 to 359. An outline of this flow is shown in Fig. 1θ, and if this flow is further represented by an electric circuit, it becomes as shown in Fig. 11. As mentioned above, this pulse count is basically programmed into a series of nine 7-kens using a diode consisting of two blocks! It can be incorporated into a circuit that has a trix and an inverter, so it is possible to control the sequence without turning off and on switches.

In Figure 10.11, Set FHVT5 turns on the cocoon modulation charging 90, Re5et FCL3 turns off the drive of the paper feed roller, s Set FCL4 ti turns on the drive of the timing roller, and FR8TRT turns on the copy start after modulation. No, ii" Iao is for determining whether or not there is multi-retension. The blank space in Figure 1O is similar to 7p- at count 30, and the required # device activation command at the plate count is given. It is also possible to form an operating circuit for other equipment as shown in Figure 11.Next, we will discuss the means for stably achieving retention. As the number of retentions progresses, the charges in the image naturally discharge and the potential decreases, which affects the shading, contrast, etc. of the nine-microscope image.Therefore, the present invention aims to improve In order to compensate for changes in the voltage, the potential of the variable charger is increased as the number of cycles increases.In the case of this device, as shown in Figure 12, the potential of the first plate is the same as the potential of the second plate. After that, make it higher, then 10th, 30th, and 50th.

Raising the potential step by step at the 70th and 90th panels 0 It is possible to raise and lower the potential by varying the primary input voltage of the high voltage transformer. are connected in series, and as the number of retentions increases, the first rank is increased by sequentially shorting this resistor using a relay or the like. These resistors may be placed in a straight line, or different resistance values may be connected in parallel and each of them may be switched.

The busiest timing to activate the switches such as the relays mentioned above is the first.
4 The formation line insulation drum counter (1) with this timing shown in Figure 4 and the change wI4W! For example, in the case of this device, the second sheet,
10th photo, 30th photo.

Since the potential is changed at the 50th, 70th, and 90th sheets, as shown in Figure 15, the decoded output of the insulated drum counter (1) is used to gate the modulated WI electronics onno (rus), and the nine relays are activated. This is the timing to activate it.Therefore, 2
The 1st sheet is IC-1, the 10th sheet is ICC, and the 230th sheet is IC-1.
29.50th sheet is IC=49.70th sheet is IC-69
, the 90th sheet is IC,, the clock when =89 is outputted to the relay from 1 to 6 at the count, latches 1 to 6 are set, and relay Kl is output. −
6 coil is activated.

Next, we will explain how to sum up the copying fee reasonably in the copying apparatus of the present invention. Deterioration is also generally caused by the passage of electric current through the photoreceptor, so the light source.

Deterioration of the screen photoreceptor mainly occurs during the step of forming the first electrostatic latent image, and has little to do with subsequent steps. Therefore, in such a copying apparatus, when accounting for copying fees, charges are charged differently depending on the size and quality of copying paper, as in conventional copying apparatuses. In addition, a total method is required that takes into account the differences between the process of forming the primary latent layer on the photoreceptor and the subsequent process of transferring it to copy paper. An example will be explained with reference to Figure @19. In the figure, 191 is a total counter that counts the number of electrostatic latent images formed on the screen photoreceptor; 192
Counts the number of times a secondary latent image is formed on an insulating drum from a secondary latent image on a screen drum, the electrostatic latent image is developed, and the developed image is transferred to copy paper. do(
This is a copy and matches the number of copies of Kuju Shashi) total counter, other numbers are f42 diagram (operation panel block diagram)
corresponds to the number of Let's explain its operation.

When the original image is exposed and the count-up switch 241 is repeatedly turned on and off each time an electrostatic latent layer is formed on the screen drum, the values of the counter 201 and the total counter 191 increase by one. It is cleared when the apparatus repeats a series of copying operations and the content of the memory 202 matches the preset number of copies of nine copies. However, the total counter 191 continues to count even for the next copying operation without being cleared. In other words, when the original picture is replaced and a new number of copies is set, the counter 201 starts counting again from 1, 2, 3, etc., but the total counter 191 starts counting from the previous count basket + 1. .

See you next one! The count-up switch 242 for the steps of forming a film, developing it, and transferring it to copy paper is turned on.
Each time the off is repeated, the counter 204. )-tal counter 192Fi, respectively the aforementioned counter 201.
)--The total counter 201 performs an operation corresponding to the total counter 191, and the total counter 201 continues to count the total number of copy sheets that have been copied without having its contents cleared. In this way, the number of times an electrostatic latent image is formed on the screen drum and the subsequent steps up to the transfer of the visible image to the copy paper are counted separately, and each total counter is calculated when collecting the copying fee. Payment will be made in separate fees. As described above, by accounting for copying fees, when multiple copies of the same original painting are made, the unit price of each copy becomes cheaper as the number of copies increases), an accounting method that takes advantage of the features of the present invention. system is achieved.

The above description has been made using an example of a copying apparatus that transfers a visible image onto plain paper. In products that use the so-called TgSI method, in which nine latent scratches formed by light are directly transferred onto plain paper and developed to produce a copy, secondary scratches on an insulated drum can also be directly transferred. It is also effective for making copies by transferring to plain paper and developing it.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a copying apparatus according to the present invention, FIG. 2 is a drive circuit for a display in the copying apparatus according to the present invention, and FIG.
Figures (a) and (b) are time charts of equipment operations in the copying apparatus according to the present invention, Figure 4 is a block diagram of the control section of the copying apparatus according to the present invention, and Figure 5 is a diagram of the control section of the copying apparatus according to the present invention. 70-chart, FIG. 6 is an example of a circuit diagram embodying it, FIG. 7 is a driving circuit diagram of each 411PrF, and FIG. 8 (a
), (b) are time charts and circuit diagrams of jam detection operations, FIG. 9 is a time chart of equipment operations after jam detection, and FIG. 10 is a more detailed sequence judgment 70-
The chart, Figure 11, is an example of a circuit diagram that embodies it, @
Figures 12 and 13 are circuit diagrams of the G77 for correcting image quality changes during retention copying, Figure 14 is a time chart of the operation in Figure 13, and Figure 15 is an example of the drive circuit in Figure 13. , Fig. 16 is an example of the drive circuit of the device in Fig. 3%@
Fig. 17 is a cross-sectional view of the screen photoreceptor, Fig. 18 is an example of a prohibition time signal generation circuit in the event of a jam, Fig. 19 is a schematic diagram of the accounting system, Fig. 20 is an example of the charger output side circuit, Fig. 21 This is an example of a signal generation circuit for Figure 16 using Figure 18! 7% What is 202 in Figure 4? Memory for i<1, 20
1 is the screen drum counter, 203 is the second memory, and 413 is the first ? ! edge drum counter, 414 is the second
This is an insulated drum counter. Procedures Amendment (method) Kazuo Wakasugi, Commissioner of the Japan Patent Office1, Indication of the case, Patent Application No. 211905, filed in 19822, Name of the invention, Image forming device3, Person making the amendment, Relationship with the case, Address of the patent applicant, Tokyo 3-30-2 Shimomaruko, Ota-ku, Tokyo Name (100
)Representative of Canon Co., Ltd. Ryu Kaku 3 Department 4, Agent Address: 3-30-2 Shimomaruko, Ota-ku, Tokyo 146 April 26, 1981 (shipment date) 6. Specifications and drawings subject to amendment 7. A detailed description of the amendments and an engraving of the drawings (no changes to the contents). December 29, 1980 Director-General of the Patent Office Kazuo Wakasugi 1, Indication of the Case 1980 Patent Application No. 211905 2,
Name of the invention Image forming device 3, relationship with the case of the person making the amendment Patent applicant Address: 3-30-2 Shimomaruko, Ota-ku, Tokyo Address: m146 3-30-25 Shimomaruko, Ota-ku, Tokyo, Specification subject to amendment 6 , Contents of amendment (1) The following will be added after “ru.” on page 2, line 7 of the specification. ``That is, the present invention includes a plurality of process means (Fig. 1) for forming an image on a rotating body (8) and a transfer image on a transfer material, and a series of pulses synchronously with the rotation of the rotating body (8). said pulse generating means (59, 60 in FIG. 1); and sequence control means (FIG. 7) for controlling the operation of some of said process means by counting said pulses. is composed of a rotating member (59) having a large number of control points in the rotational direction, and a detector (60) that detects the control points and generates a pulse, and the rotating member (2) Correct r409J on page 33, line 11 to ``20IJ,'' and add ``Do.'' on page 34, line 1. . (3) After “59” on page 36, line 13, “(1st
Figure 1) is added. (4) In the second line of page 41, before "therefore," ← "This is inconvenient." is added. (5) "34-45" on page 50, line 11; (6) "read-only memory" added after "had" on page 51, line 7; page 52, line 3. After “There is” in the line, “
This allows stable timing control without requiring a complicated configuration. ” is added.

Claims (1)

[Claims] a plurality of process means for forming an image on a rotating body and a transfer image on a transfer material; a means for generating a series of pulses synchronously with the rotation of the rotating body; and sequence control means for controlling the operation of some of the means, and the pulse generation means is comprised of a rotating member having a large number of control points along the rotational direction and a detector that detects the control points and generates pulses. An image forming apparatus characterized in that the rotating member is rotated for more than one rotation per rotation of the rotating body.