JPS58179857A - Image forming device - Google Patents

Abstract

PURPOSE:To control image formation sequentially with simple constitution by continuing the image forming process operation corresponding to the programmed control signal from an ROM to the prescribed sequence point of a certain division at the time of inputting stop signal. CONSTITUTION:When the start switch in a keyboard part 402 is operated, primary and secondary latent images are formed respectively, and programmed control signals are read out successively from the ROM of a CPU 401 according to the coincidence outputs from the screen drum and insulation drum side provided with memories 202, 203 wherein the numerical values corresponding to the number of copying sheets is set, drum counters 201, 413 and 414, coincidence circuits 410, 415 and 416, etc. and the detection output from a detector 403 for the home position of the screen drum. A mechanism part is then controlled sequentially with an interface part 406, and if a stop operation is performed in the mid-way of the control, the sequential control is continued up to the point of the time of a certain division, whereafter the control is stopped. The need for logical calculation is eliminated by the control using the ROM and the image formation is controlled sequentially with the simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a 511 forming apparatus that forms a set number of images.

Conventionally, the procedure for copying sequence control has been constructed using logic circuits, which directly calculates inputs and outputs signals to specific equipment; therefore, as the number of various conditional signals for sequence control increases, the circuit becomes extremely multi-wired. Met.

The present invention uses a read-only memory to eliminate such inconveniences, and is also devised to eliminate the inconveniences in that case.

FIG. 1 is a sectional view of the copying apparatus of the present invention.The mechanical structure thereof will be described below. Three-layer screen photoreceptor (first
Figure 6) has ring-shaped ends that are connected by a connecting band and stretched with adhesive onto an integrated metal screen drum base.
A screen drum 1 is installed on a tubular screen drum shaft 2. In addition, screen drum flanges made of insulating material are fixed with screws or the like at both ends of the screen drum 10 in consideration of the application of bias voltage, etc., and a modulation charger 11 and a pre-modulation charger 13 are installed in front of the screen drum 7 lunges. It has an opening so that it can be installed inside the screen drum 1. The screen drum 7 langes are installed on a fixed tubular screen drum shaft 2 via ball bearings. The screen drum 1 is rotatable around a fixed screen drum shaft 2.

The screen photoreceptor of the screen drum 1 has a photoconductive member 71 and an insulating member 7 on a conductive member 70 having a large number of fine holes.
This is a book in which the conductive members 2 are stacked one on top of the other so that one side of the conductive member is exposed. The conductive member is made by weaving thin metal wires made of stainless steel, nickel, etc. into a net shape. The mesh value of the conductive member is 100 to 40 in terms of resolution for copying.
0 mesh, an aperture ratio of 50% or more, and a colored one are suitable. The photoconductive member is made by vapor deposition of S, alloy, etc., CdS,
It is created by spray coating, etching, etc. using a dispersion of an insulating resin containing particles such as PbO. The above insulating material is made of epoxy resin.

Materials such as solvent-based organic insulators such as acrylic resin and silicone resin are prepared by spray X-ray vacuum evaporation. In addition, it is possible to make the conductive member exposed on one side by coating one side of the conductive member, applying or spraying the conductive member, and then grinding the recycled member.

The following devices necessary for forming electrostatic latent scratches on the screen photoreceptor are arranged on the screen drum 10/9. A pre-irradiation unit 3 is provided to erase undesirable ghosts on the screen photoreceptor, and a primary charger 4 applies a uniform electrostatic charge to the screen photoreceptor. Since the diameter of the screen drum is relatively small, during the formation of electrostatic latent scratches on the screen photoreceptor, the front end of the image may be charged again even though electrostatic latent scratches have already been formed. Therefore, the primary charger 4 is divided into two parts, and the same voltage and current are applied to each part with a time gap. The AC static eliminator 6 is provided to remove electric charge on the photoreceptor according to the light beam 5 of the original irradiated by the original irradiation lamp 52 . Also, instead of an AC static eliminator, it is no problem to use a DC static eliminator with a primary charge and a wire with opposite polarity. Full-surface exposure lamp 7Fi is used to enhance the contrast of the primary latent of the screen photoreceptor. Also screen drum 1
Insulating drums 8, in which an insulating layer is coated in a thin film on a conductive member, are arranged adjacent to each other with a small distance therebetween. The screen drum 1 rotates in the direction of the arrow A, and the insulating drum 8 rotates in the direction of the arrow B, respectively.

Inside the screen drum 10, a modulation charger 11 is installed on a rail lO which is installed at the 9th position facing the screen drum 1 and closest to the insulating drum 8, and which is coated on the 9th insulating block 9. A pre-modulation charger 13 is attached to each of the rails 12. In addition, in order to prevent dust from adhering to the screen drum l and interfering with the formation of the primary and secondary layers, the air blower 14 and the discharger 15 in the middle move the floating dust to the bank plate 16 of the discharger. Attach it,
The static elimination nozzle 17 blows clear air onto the clean drum 1. In addition, if the screen photoreceptor is susceptible to low temperatures and high humidity, the air being blown may also be heated by the heat source 18. When obtaining a large number of secondary latent scratches, the secondary latent image on the insulating drum 8 is used to apply a voltage of opposite polarity to the modulation charger 11 so that the potential of the primary latent remains constant from beginning to end. The image is developed by the developing device 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 3J [device 2
The 0 developing toner 25 sent into the 0 is stirred by a stirring roller 27.
The electrostatic latent image on the insulating drum 8 is sufficiently agitated by the zero rotation, and the electrostatic latent image on the insulating drum 8 is created by the sleeve 29 containing the magnet 28.

The paper feed tray 30 can load a large amount of copy paper (2,000 to 4,000 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. It rises along the guide rail 32 by driving.

The copy paper is sent out from the top of the paper by a pick-up roller 33 so as to almost match the image on the insulated drum 8, and further by a timing roller 34, it is brought into alignment with the image on the insulated drum 8. The developed image on the insulating drum 8 is transferred to copy paper via a conveyance roller 35 by a transfer charger 36. Further, the separation charger 37 weakens the adhesion force between the insulating drum 8 and the copy paper, and the copy paper is separated and conveyed from the insulated drum 8 by the conveyor belt 38 built in the suction device 391c. The conveyor belt 38 is driven by a belt drive roller 40. A conveyor belt stretched between rollers 41 and 42, rotates as the rollers rotate, and conveys the copy paper while sucking it.Furthermore, a conveyor belt stretched between rollers 43 and 44 transfers the copy paper to the fixing roller 45. send to The powder image on the copy paper is then fused and fixed, and the copy paper is received by a tray 47 along a guide 46.

(Description of operation specifications of key operation panel) The operation of the copying apparatus of the present invention is performed by commands from the operation panel 61 shown in FIG. The operation panel 61 has two displays 1!6
It consists of 2.63.2 pilot lamps 65.66 and a keyboard 64. key r on keyboard 64
OJ (0RIGINAL) is screen drum I
K is used when setting the number of electrostatic charges to be formed.
Ribbon on this key.

If the user presses a numerical key from 0 to 9, the contents of the presses will be entered on the display 62.

Further, if the [~] key is pressed after the numeric key is entered, the contents of the display 62 are cleared and the pilot lamp 65 of "-" is lit.

Conversely, if you enter the numeric key after the r-J pilot lamp lights up, the pilot lamp goes out and the display 62
A numerical value is entered in . That is, numerical data and the same command are automatically switched. In addition, "t" means the action,
[5 This is to be repeated indefinitely until the TOPJ command (described later) is received. Next, the key rRJ (RETENTION) is used to set the number of copies that can be repeatedly obtained by one electrostatic latent image formed on the screen. numeric keys or “
The entry for the "-" key is the same as for the "0" key, and its contents are displayed on the display 63 or pilot lamp 66. For example, when entering <123> on the display 62 and <456> on the display 63, the key operation is "0" → "1" → "2" → "3" → rRJ → "4" →
The order is "5" → "6". Therefore, the numeric keys from "0" to r9J and the "-" key are the two function keys r.
By switching between OJ and rRJ, it is possible to enter the 27 display 62.63 or the pilot lamp 65.66 as desired.

Of course, the "0" key and the "l" key may be specified first. Next [cOJ (CLEARORIGIN
The AL) key is used to clear the display 62 or pilot lamp 65, and is used to correct numerical data, etc. of books that have been entered incorrectly. Therefore, display 62K<
Correct the entry as <123> to <456>, and if it is round, press the keys in the order of [CO] → "0" → [4] → r5J → "6". rcRJ (CLEARRET
ENTION) key has the same purpose as the display 6.
3 or clear the pilot lamp 66.

[5 The TARTJ key is used to start the copying operation, but the indicators 62, 63 and pilot lamps 65.
If the displayed contents of 66 are in an unreasonable combination,
TARTJ key does not work. The unreasonable combination is when the content of the display 62 is <000> and when both the pilot lamps 85 and 66 are lit. The reason for the former is that it is impossible to copy without forming an electrostatic charge m11 on the screen drum 1, and the reason for the latter is that every time an electrostatic charge m11 is formed on the screen drum 1, it is impossible to copy. This is because it is not possible to perform an infinite number of retention times. Furthermore, when the output TARTJ key is activated and the copying machine starts to operate, keys other than rsTOPJ are not activated due to a prohibition circuit which will be described later.

Also, <002> is displayed on the display 62, and <003> is displayed on 6B.
In the case of entry, after the primary latent flaw is formed on the screen drum, modulation, development, and transfer are repeated, and by repeating this cycle again, six copies are obtained. At this time, when the rsTARTJ key is activated, the two displays display <000>, and as the copying operation progresses, <001><002>, etc. are displayed.

(Description of operation panel circuit configuration) FIG. 2 is a block diagram of the operation panel circuit according to the present invention. Memory 202. A counter 201 corresponds to the display 62 and stores and counts the number of electrostatic latent images formed on the screen drum. Memory 203. A counter 204 corresponds to the display 63 and is used to store and count the number of copies to be made using one primary latent image.

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 11" level, but when the inhibit When the circuit 216 operates, it goes to the "0" level and does not output even if the key group is operated.
1 and 2 OR games) 222.223. Each of the above clip flops remembers that the 5TARTJ key was pressed, the 5TOPJ key was pressed, and jams such as excess paper, feeding of two sheets of paper, and poor paper separation occur. Neither of the clip/)a tabs 209 and 210 is set; when one is set, the other is reset. In other words, the 5TART and 5TOP instructions do not work at the same time. Furthermore, when the 7-rip/70-tub 211 is set, the 7-rip flops 209 and 210 are always reset and all operations are interrupted when paper jams. OR
The outputs of gates 222 and 223 are normally '1'.
Ilo” level, but 7 lips, 70 tubes 209
, 210, 211 are set, these are @0".

Invert to 11” level, i.e. r, 8TARTJ key.

When either the rsTOPJ key or JAM detection is in operation, the prohibition circuit 216 is activated and the signal line 214 is @
0'', and the signal line 215 becomes 11''.

Therefore, a group of keys 217, 218, 220°2 on the operation panel
At the same time as 21 is prohibited, 225 and 226 are closed, 224 and 227 are opened, and the memory 202. Memory 2030 contents and replacement counter 201. The contents of counter 204 are displayed. During the copying operation, keys other than the [5 TOPJ key do not work.

Therefore, at the moment when the [5TABTJ key is activated, the counter is still zero, so the display 62 shows <002>→(00
0), 63 becomes <003> −+ <000>. However, as the copying operation progresses, this value is counted up, and when the corresponding memory value and the counter value become equal, the copying operation ends. When copying is completed, each counter is cleared to zero in preparation for the next operation, and the displays 62, 63 again display the numerical values in the memory.

When the jsTOPJ key is pressed at any point during the copying operation, the operation is terminated at a convenient point in the process from that point.

Next, 7 Lips and 7a Tubs 205 and 206 companies respectively.
It remembers that the ``0'' key and the ``R'' key have been pressed, and neither of these keys is set; if one is set, the other becomes a social outcast.

Now, when the "0" key is pressed, 7 lips/70 tsugs 205
is set, gates 228 and 229 open, and then when any key in the numeric key group 217 is pressed, gate 2 opens.
If the pilot lamp 234 is lit by the signal line 207 through the signal line 28, it is reset by the signal line 232 and the lamp is turned off. Also, the number D K r- of the numerical key group 217
When the J key 221 is pressed, the gate 229 is passed through to set the shift flip/70 knob 207 and the pilot lamp 23 is set.
At the same time as 4 is turned on, if there is already a numerical value in the memo ')-202, it is cleared through the signal line 233. Therefore, the entry of a numerical value into memory and the "Zeng" command are never satisfied at the same time; if one is true, the other is always not true.

Furthermore, when the "R" key is pressed, 7 rip, 70 rip 20
5 is reset, the flip 70 knob 206 is set, and the gates 230 and 231 are opened. Hereinafter, as in the case of the "0" key described above, the numerical value of the first key group 217 is the gate 231.
Enter memory 203 through ``Gentle'' key is gate 230
Set the 7 lip/70 knob 208 and turn on the pilot lamp 235. This is also memory 203
If it is entered, the flip 70 knob 208 is reset, and if it is set conversely, the memory 203 is cleared, and therefore the numerical data is not entered into the memory.
-” command line is automatically switched. Furthermore, input can be entered into two types of memories 202 and 203 by one type of key group 217 and 221.

(Relationship between sequence and machine work) Figure 3 is a time chart showing the operation sequence of the copying machine shown in Figure 1, in which the command from the operation panel is 0RIGINAL<
002) RETENTION<002>.

First, at the same time as the power switch is turned on, a cleaning motor 320. Screen dust collector 15 (
(Fig. 1), screen dustproof 77n 14 (Fig. 1).

Two screen heaters 18 (Figure 1) and the toner floating in the current dispenser 11! Existing dust collection fan 32
5 starts driving and continues until the power switch is turned off.

However, one screen heater is turned off when the first electrostatic latent formation is completed.

Next, when the 5TARTJ key for starting one copy 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. Referring to FIG. 1, the mechanism of the optical system will be described. The document illumination lamp 52 on the document crow irradiates the document, and the first reflection mirror 53, which is installed integrally with the document illumination lamp 52 and the lamp reflection mirror, serves as a screen. They move at nine speeds V in synchronization with the circumferential speed of the drum 1. While the screen drum motor is being driven to illuminate the document illumination lamp, it rotates at its peripheral speed, and when it is turned off and the insulated drum motor is turned on at the same time, the speed of both drums instantly increases to about twice that.

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

Also, at the same time as the rsTARTJ key is activated, the powder image transfer charger 361 and the paper separation charger 37. The insulated drum static eliminator 50 and paper separation fan 319 (FIG. 3) are turned on and turned off at the end of the copying operation. However, the above-mentioned charger 3
6,37゜50 is the circumferential speed of the screen drum motor, and since the rotation speed of the insulated drum is slow, the potential is lowered to prevent excess charge from being charged on the insulated drum (Fig. 3-31).
7,318,321).

Next, after the formation of the first layer, the screen drum motor is turned off and the insulated drum motor is turned on, thereby starting copying operations such as modulation, one sheet transfer, and one separation. After modulation, the first sheet of copying is completed after three revolutions of the screen drum, and thereafter one sheet of copying is completed every time the screen drum rotates once.

To explain with reference to FIG. 3, first, the rotation of the drum is switched to the insulated drum motor 328, and at the same time, the pre-modulation charger 31
0 and a transport roller clutch 3 for transmitting the force of the cleaning motor 320 to the transport belt 38 (FIG. 1).
16 turns on. As the rotation progresses and the screen drum advances 80 degrees from its home position, the modulation charger 311 for transferring the electrostatic latent scratches formed on the screen drum to the insulating drum turns on, and at 310 degrees, the screen drum turns on. Paper feed roller/clutch 31 for feeding one sheet of paper from the paper feed tray
4 is turned on, and furthermore, at 1350°, the current motor 312 and the round reversible toner bridge prevention motor 313 that agitates the toner staying in the current device are turned on. After the screen drum starts modulation, the paper feed roller clutch 314 is turned off at the 3σ position when it enters the second rotation cycle, and the leading edge of the good paper and the current paper on the insulating drum are fed. Timing roller clutch 315 is turned on to align the leading edges of the images. If the number of copies is one, the pre-modulation charger 310. Modulation charger 3
11 is off, but in this case there are 2 cards, so it is not off.
j! Then, at 31σ, the paper feed roller 1 clutch 314
is turned on and the paper is fed for the second fall. At 36σ, turn off the first timing roller and second rotation cycle 315. Enter the 33rd rotation cycle. At 9.3σ, turn off the paper feed roller/clutch 314 and turn on the second timing roller/clutch 315. do. At 8σ, the pre-modulation charger 310 and the modulation charger 311 are turned off. If one copy is to be made, the developing motor 312 and toner bridge prevention motor 3 are
Turn off 13. Turn off the tie roller clutch at 36σ. Entering the fourth rotation cycle, the current motor 312 and the toner bridge prevention motor 313 are turned off at 8σ. At 36σ, the insulated drum motor 328 and the conveyance roller clutch 316 are turned off, and the retention cycle is completed.

Separation pawl solenoid 329 (
73) in Fig. 1, the tip of the paper is the lamp 69 and the light receiving element 70 (
1) by counting the pulses from the moment they pass between the positions shown in FIG. 3.

When the full duplication operation is completed, the electromagnetic brake 327 operates for a certain period of time to stop the drum from overrunning.

(Description of sequence control circuit configuration Wi4) FIG. 4 is a block diagram of the control section. External signals include signals from the keyboard that issue operation commands, and signals from the screen that serve as sequence standards.
A detection signal for the home position of the drum, a signal from a pulse generator synchronized with the rotation of the insulating drum, and six microswitch signals determining the timing of next latent flaw formation are input to the central control unit. Based on these input signals, the central control section makes full use of two memories and three counters to perform storage and judgment, and outputs appropriate signals to the interface section.

Screen drum home position detection pulse 330 (third
The 0 judgment pulse (1) 331 obtained each time the screen drum rotates once by the magnet 68 and magnetoelectric transducer 67 (Fig. 1) on the screen drum is an electrostatic latent image on the screen drum. After the formation is completed and the optical system returns again to its home position MSI, the home position of the screen drum is subsequently obtained. At the time of occurrence of this judgment pulse (t) 331, the aforementioned memo IJ-
(1) By determining whether 202 and screen drum counter 409 are equal or not, and whether or not a 5TOP command is issued, the insulating drum motor is started to start the process of forming secondary latent flaws, or to start the process of forming secondary latent flaws. A decision is made whether to restart flaw formation or stop the screen drum motor and end the sequence.

The above determination can be expressed in a flowchart as shown in FIG. In other words, the above decisions are sequentially ■ and ■.

Indicated by ■. Furthermore, when this flowchart is expressed as an electric circuit, it becomes as shown in FIG. If the vertical bus lines are defined as columns and the horizontal bus lines are defined as lines, control commands indicated by ◇ are connected to columns 601 to 604, respectively. This signal is also inverted in columns 605 to 608, and columns 609 to 609.
612. Lines 613-617 are connected to the power supply through resistors. It must be at a level equal to this power-off logic level 11''.

For example, there is no thirdTop command under the condition ◎ in Figure 5, pilot lamp 1 is not lit, and memory 2
contains a numerical value. ”, so if we express this in a logical formula, it becomes “@-FSTOP・FS-・IL=0.” Therefore, if we connect diodes to each of columns 609, 610, 611 and line 615 in the direction shown in the figure, AN
D circuit is formed and columns 609, 610, 611 are @
Only when the level is 1", line 615 becomes @1" level. In other words, when the condition ◎ is satisfied, line 615
becomes 11”.Similarly, the condition for ■～■ is line 613
~617 is output. Further, lines 613-617 are inverted by inverters 618-622, and lines 623-62 are inverted.
Connect the columns 628 to 630 that intersect with this 2-in 623 to 627 to the power supply E with a resistor, and again,
If we form a diode matrix here, line 6
30, the condition [■ or [F]'' is satisfied, and only 9th and 8th level become @lO'' level, and the output 644 of the inverter 633
The logical formula becomes ■+@", and the above condition is met, and the level becomes 11" only at the time of death.

Therefore, this is the control pulse (11F J 1 and the screen drum home position pulse DH which is the separation point of operation)
By passing P through the gate 638, it is possible to issue an operation command ``■'' to end the sequence and to latch the memory circuit. In the same way, it becomes possible to issue command signals of ■■. In the case of the signal (2), the outputs of the chargers 36, 37, and 50 described above are lowered as shown in FIG.

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 high speed, and the disk 59 is rotated in synchronization with the drum by the gear. Then, a circular hole made on the circumference of the disk 590 passes through a gap between a pair of light emitting elements and light receiving elements 60, and a signal generated by K is extracted as a clock pulse 332 (FIG. 3).

This clock pulse generates one pulse per revolution r of the screen drum, 360 pulses per revolution. 1 per r for a disk of the same diameter as the screen drum
It is difficult to drill individual holes, so a separate disk is provided.
The rotation of this disk is made one times that of the screen drum using a gear, so that the number of disks is 1/l. In the process after modulation in this device, this clock pulse is processed to drive the equipment. It is used as a signal. 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 sequence control standard is By making half a revolution of the insulating drum or one revolution of the screen drum, the binary conversion 36
Activate the 0-base counter and read 333 to 3450 in Figure 3.
It outputs control pulses.

An example of a circuit for generating this control pulse is shown in FIG. Inherit the slip 70 knob 101m and set the clock pulse to 0~
Form a 360 way counter that counts in 359 decimal numbers.

The first four 7-lip 70-lips represent the 1 digit, 0 to 9
Decimal counter that repeats the count up to the next four 7s
The lip 70 tube shows the digit of 10 and is a decimal counter that repeats counting from 0 to 9. The last two digits show the digit of 100 and is a 3-pass counter. However, when the count advances from 0 and changes from 359 to 36G, a set signal is output from the decoder and all 7 and 70 tabs are set to O.

In this way, it becomes a 360-way counter that repeats the count from 0 to 359 every time the screen drum rotates.

The control pulses 333 to 3450 shown in FIG. 3 are generated by decoding the output of the counter described above with the matrix circuit (decoder) shown in FIG.

If it is desired to change the timing of the sequence 310 to 316 in FIG. 3, this can be done by arbitrarily changing the position of the diode of the decoder.

For example, delicate adjustments such as paper feeding timing and registration between the leading edge of the paper and the developed image on the drum, which cannot be adjusted using a combination of a microswitch and a cam, can be easily made.

Here, in FIG. 3, for example, the pre-modulation charger 310 is
It turns on at the 1st count of the cycle, and if the number of copies is 1, it turns off at the 80th count of the second cycle, and if the number of copies is 2,
K requires selection of a control pulse to turn off at count 80 of the third cycle.

The present invention consists of two insulated drum counter ICs as shown in FIG.
, IC' is used to count the discrimination pulse (21) and compare the count value with the memory (2) to facilitate the selection of the 9th cycle. In other words, the 347 insulation pulses that count 11' from the second cycle The drum counter IC is activated, and if the memory (2) that stores the desired number of copies is equal to the above-mentioned counter value, the ON signal during that cycle is killed.Thereafter, 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 insulated drum counter IC and the memory (2), the said counter is already connected to the memory (2) in the third cycle. Therefore, the counter value of this clutch for the second sheet of paper is also compared with the insulated drum counter σ, which counts up with a delay of one count, with the memory (2) to control the on/off of the clutch. .

In the case of Figure 3, the insulated drum counter IC matches the memory (2) in the third cycle and stops counting, whereas the insulated drum counter IC' matches the memory (2) in the fourth cycle.
) matches. Therefore, the insulating drum counters (1) and (2) match in f44 cycles. The coincidence of these two counters means the final pulse of copying, which means the last pulse of the cycle, i.e. the decision pulse (2 times the wound time).
After clearing the two counters, check whether the screen drum counter and the memo y-(1) storing the desired number of latent image formations match again. If they match, issue a command to finish copying and stop rotating. If they do not match, the aforementioned insulated drum motor is turned off, the screen drum motor is rotated to start exposure, and the same sequence after forming the second latent image is repeated.

FIG. 16 is a diagram showing an example of drive control of each device.
312, 314, 315 are #! In Figure 3, there is a paper feed roller clutch, a pre-modulation charger, a developing motor, and a timing roller clutch, and 9.160 is an amplifier that operates these;
167.170 is a 7 lip 70 knob gate, 161,
164, 166° and 168 are inverters, 162 is a Nant gate, 163 is a NOR gate, and 165, 167 are AND gates. When each matching circuit determines whether the counter IC, Iσ matches the value setting memory (2), the on-pulse is stopped and the off-pulse stops the device, and the device can be controlled at a predetermined timing. It is.

Next, the case where the transfer paper jams will be explained with reference to Figure 8.
If the paper gets jammed in the conveyance path, or if the paper does not separate properly after transfer and sticks to the insulated drum and moves, the paper may
In order to detect a jam when sheets are fed, a light source 69 and a light receiving element 70, and a light source 71 and a light receiving element 72 are provided in FIG. When the leading edge of the paper crosses the light source 69 (SGI), the light receiving element 70 picks up the pulse of the clock pulse generator and starts the jam counter. A separation confirmation detection pulse SDP is generated by decoding the output of .

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 becomes jammed in the conveyance path or cannot be separated, the paper will not cut through the light source 71 even though the separation detection pulse is output. 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. Also, using this counter, separate the separation claw 73 (first
It is possible to output a pulse signal from the same decoder to create the timing for activating (Fig.).

The sequence control unique to the present invention after detecting a jam will be explained with reference to FIG.

In the event of a jam, the insulated drum motor is immediately stopped using an electromagnetic brake and all sequences are turned off, but repairs can be made without turning off the power switch. During repair, the counter display remains stationary, showing the number of counts at the time of the jam. When the repair is completed, press the rsTARTJ key again to rotate the screen drum motor, rotate the screen drum to its home position, turn off the screen drum motor at the home position, and turn on the insulating drum motor. Since the electrostatic latent image on the screen is maintained even during 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, whether it is the first sheet or the first sheet restarting after a jam, the insulated drum rotates one and a half revolutions (screen drum 3).
rotation), so if you want to restart after a jam, keep the insulated drum counters ICI and IC2 stopped.
The timing of the first sequence after modulation must be created. For that reason #! As shown in Figure 9, prohibition time 1 and prohibition time 2 are created in the first and second cycles of the sequence, and thereby the count-up of 0 and insulated drum counters 1 and 2, which control the first sequence. is performed from the beginning of the third cycle, and the subsequent sequence control is the same as normal control.

The following cases can be considered as jams. ■１
Insulated drum counter 1 (
IC) and 2 (IC') → Memory (2) jams, ■
Jam when IC=memory (2), ■IC'=memory (2)
), the following shows the counter movement for restarting after a jam. However, it is assumed that memory (2)=4.

In case (2), both IC and IC' count up from the third cycle. In case (2), only IC' is counted up in the third cycle, IC=IC', and the process ends at the end of the third cycle. In the case of ■, the count does not increase even after entering the third cycle, and IC=IC' at the end of the third cycle.
Check and finish. ■ and ■ end up with an expansion cycle, but this happens when the paper jams and the dead point is due to a jam near the paper leading edge detector due to 12-sheet feeding, etc., or when there is a failure in paper separation, even if the paper is the same. Depending on the jam time difference■
This is because there is a difference between and ■.

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 copy must be copied in any case, so in prohibition time 1, the numbers 310 to 310 in Figure 3 are copied.
The 3140 function is turned on at the appropriate timing. 3
15 is also turned on at an appropriate timing between INHI and INH2 (INHI is an inverted signal of INH). At the next KINHI/INH2 time, 310 and 311 are compared with the contents of the counter IC and memory (2), and if they are already equal, they are turned off, and 314 is also turned off.
If they are equal, it will not turn on. For cycles after INH2, the IC and IC' counters are controlled as described above, so the memory (2)
It is controlled by comparing this with these two counters.

The circuit that generates the above inhibited time signal INHI, 2 is @1
8 As shown in Figure 1, 181 and 182 in the figure are clips 7
0, 183 and 184 are gates, FR8TRT is a start signal for starting the rotation of the insulating drum, FJ2 is a judgment pulse (2), and INHI and 2 are outputted by the gates 183 and 184 at the timing shown in FIG. Do not drive the equipment or stop the counter during this prohibited time! It is controlled by a circuit as shown in s21. The on and off pulses in the figure are the same as the sequence pulses in FIG.

The control of the sequence after the above-mentioned latent damage modulation 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 a 360-decimal counter that counts clock pulses. Pulses 34 to 45 in Figure 3 occur at the appropriate number of counts in each cycle, but they are not used in their entirety, but only in cycles where conditions are met to turn on the latch slip 70 of the associated equipment. Alternatively, by turning it off, it is possible to create a flow that loops the sequence counter from 0 to 359. An outline of this flow is shown in FIG. 10, and if this flow is further represented by an electric circuit, it becomes as shown in FIG. 11. As described above, the flow in which a series of sequences based on pulse counting is programmed can be incorporated into a circuit consisting of two blocks, a diode matrix and an inverter, without using any cisinches. It becomes possible to control the sequence. In Figure 10.11, S@t F'HVT5
is the command to turn on the pre-modulation charger, R@set FCl2 is to turn off the drive of the paper feed roller, Set FCl4 is to turn on the drive to the timing roller, and FR8TR
T determines whether or not a copy start after modulation is started, and FI (to) determines whether or not multi-retention is performed. 1st
The blank space in FIG. 0 can also be used to output operating commands for the required equipment at the corresponding count in the same manner as the flow in step 30.

Further, as shown in FIG. 11, operating circuits for other equipment can also be formed.

Next, regarding the means for stably performing retention, the electrostatic latent scratches formed on the screen will naturally discharge as the number of retentions progresses, and as a result, the potential will decrease, and as a result, the electrostatic latent scratches formed on the screen will be The quality of the image is affected by the shading, contrast, etc. Therefore, in the present invention, the potential of the modulation charger is increased as the number of retentions progresses in order to correct the change in image height due to the decrease in potential. In the case of this device, as shown in Figure 12, the potential of the first sheet is higher than that of the second and subsequent sheets, and then the 10th, 30th, and so on.
The potential of the SO, 70th, and 900th sheets is increased stepwise.

The potential can be raised or lowered by varying the input voltage on the primary side of the high-voltage transformer. In other words, using Figure 13 as an example, it is possible to increase or decrease the potential by connecting six resistors in series and using a relay that operates as the number of retention increases. The potential is increased by sequentially shorting the . These resistors may be connected in series, or different resistance values may be connected in parallel and each of them may be switched.

The timing to activate the switches such as the above relays is the first
This is shown in Figure 4. This timing can be created by combining an insulated drum counter (1) and a modulated charger on-pulse. For example, in the case of this device, the second sheet, 10
Since the potential is changed at the 1st, 30th, 50th, 70th, and 90th sheets, the on-pulse of the atmosphere charger is gated by the decoded output of the insulated drum counter (1), as shown in Figure 15. This is the timing to activate the relay. Therefore, the second sheet is IC=1°, and the tenth sheet is 1jIc=9.
300th IC = 29.50th tiIC = 49.70
The 1st sheet is IC = 69.900 sheet When the clock pulse is 89, the clock pulse = 80 counts, and the operating pulses 1 to 6 are output to the relay, and the latches 1 to 6 are set, and the relay is set to 1 to 6. Activate the coil.

Next, a reasonable accounting method for copying fees in the copying apparatus of the present invention will be explained. The light source that exposes the original image is used only during the process of forming the next stage, and the deterioration of the photoreceptor is generally caused by the passage of current through the photoreceptor, so the deterioration of the light source and screen photoreceptor is the main cause. This occurs during the step of forming the electrostatic latent, and has little to do with subsequent steps. Therefore, in such a copying device, when accounting for copying fees, in addition to accounting for different fees depending on the size and quality of copy paper, as in conventional copying devices, a step of forming a latent image;
An accounting method is required that takes into consideration the differences in the subsequent process up to transfer to copy paper. An example of this will be explained based on FIG. 19. In the figure, 191 is a total counter that counts the number of electrostatic waves formed on the screen photoreceptor;
2 is the number of steps to form secondary latent scratches from the primary latent image on the screen drum on the insulating drum, to develop the electrostatic latent scratches, and to transfer the developed image to copy paper (this is corresponds to the accumulated number of copies), and the other numbers correspond to the numbers in FIG. 2 (operation panel block diagram).

Let's explain its operation. The count-up switch 2 is activated each time the original image is exposed and an electrostatic latent scratch is formed on the screen drum.
41 is repeatedly turned on and off, the values of the counter 201 and the total counter 191 increase by one. The counter 201 is cleared when the apparatus repeats a series of copying operations and the content of the memory 202 matches the preset number of nine copies. However, the total counter 191 is
Even if the copy operation continues without being cleared, the count will continue to be counted. In other words, when the original picture is replaced and a new number of copies is set, the counter 201 will be set to 1 again.
Then, the count starts as 2.3, etc., but the total counter 191 starts counting from the previous count value of 1g1t +1. In addition, a count-up switch 242 is used in the process of forming secondary latent scratches, then printing, and then transferring to copy paper.
Each time the counter 204 is turned on and off, the counter 204, )-tal counter 192 is turned on and off, respectively.
, performs an operation corresponding to the total counter 191,
The total counter 201 continues to count the total number of copied sheets without its contents being cleared.

In this way, the number of times electrostatic latent scratches are formed on the screen drum and the subsequent process up to the first visible image on the copy paper are counted separately, and each total counter is used when collecting copying fees. , to be collected 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, and an accounting system that takes advantage of the features of the present invention has been achieved. be done.

Also, if paper jams during copying, the machine will return to normal if the operator removes the jammed paper, so it will be easier if the operator is informed where in the machine the jam occurred. You can remove jammed paper. In this embodiment, a display indicating the number of copies is used, and a numerical display that displays two digits in seven segments is used as the display device. If the paper jams at the second detection point among the many jam detection points, <J2 is displayed as shown in FIG. 22 IJ1+.

Also, if a control circuit necessary for a copying machine, such as an optical system, copying device, or transfer device, breaks down, you can set a number corresponding to the control circuit in advance, so that, for example, if the optical system control circuit (compatible A8) breaks down. The trunk is Failur as shown in Figure 22 (I)).
F8 is displayed with the initial letter e. When the user sees this, he or she knows that there is a malfunction in the machine and at the same time reports the malfunction A to the manufacturer's service department, so that the service personnel can promptly take appropriate measures. Therefore, service time can be shortened.

Furthermore, the presence or absence of copy paper can be displayed using the display device. In other words, when you don't have paper, use Paper! IE
If you have many cassettes that store pre-distributed paper, the number of paper in the cassette that has run out can be displayed after PE, for example 3.
In the case of the second cassette, PE3 is displayed as shown in Figure C.

Note that it can be displayed as 4P3 with two digits.

Furthermore, when there is no developer to use for the current situation, D
E [dl, it is possible to display IE (・) when there is no power and power is exerted. The initial letters used in the above description to indicate each state are not limited to the above examples.

The entire circuit as a switching means for displaying the above will be explained with reference to FIG. 23. Figure 2 shows a display device that counts the number of copies, and displays the jam (for example, J'') and the jam location as numerical values (for example, III, 1121''), making it easy to count and display with one display device. It also serves as a jam display.

In the figure, 701 is a counting means for counting the number of copies;
2 is a gate that controls the output of the counted value; 703 is a gate that controls the output of the jam location; 704 is a gate that outputs the count signal or jam signal; and 705 is a decoder that converts the output into a power transmission signal for the segment of the display 711. .

706 is a 7-lip flop that outputs two communication signals indicating the jam location; 707 is a detector that detects the jam location; 70
8 is an encoder that converts the detection signal into a binary coded decimal output, and 709 is a flip-flop that outputs a jam signal.

One or more jam detectors 707 (abbreviated as switches) are numbered in advance. For example, 01 is the timing roller.
Nearby, 02 is near the paper separation gain, 03 is near the fuser...
), the number is converted to a binary value by an encoder 708 and its output is input to one or more flip-flops 706 corresponding to the binary weights. Also, the encoder 708 outputs the Hirojam detection signal 710, sets the flip frog 709, and sets the clip/frog 709.
The output of the frog 709 is used to switch the jam display of the counting device 1. With this switching, the contents of the counting device 1 are passed through the gate z and converted into a binary flip-flop 70.
The output of 6 passes through gate 3, is converted into binary 10 by decoder 705, and is displayed on a display device.

For example, a case will be described in which the JAM detector of A2 is activated and "JO2" is displayed on the display device consisting of three digits.

When the JAM detector M2 operates, the encoder 708, the flip-flop (F2) with a weight of 2, and the flip-flop 709 are set, the counting of the counting device 1 is stopped, the gate 2 is closed, and the gate 703 is opened. It will be done. Then, the contents of the flip-frog group 706 are passed through gates 703 and 704, and are numerically displayed in the lower two digits of the display device by a decoder 705. The output of the flip-frog 709 goes directly to the decoder 705, and the character WJll is output directly to the decoder 705.
is coded and displayed on the most significant digit of the display.

The above description has been made using a device for transferring visible light onto plain paper as an example, but the present invention is capable of directly transferring the visible light formed on a photoreceptor by exposure to light onto plain paper, and then printing it to form a copy. So-called TE
It exhibits excellent effects both in applications using the SI method and in applications in which secondary latent scratches on an insulated drum are directly transferred to plain paper and used as copies. In addition, it is also effective in general copying machines that make copies of a set number of sheets.

[Brief explanation of the drawing]

Fig. fs1 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. 3 is a schematic cross-sectional view of a copying apparatus according to the present invention.
Figures (al and 3(b)) are time charts of equipment operations in the copying machine according to the present invention, Figure 4 is a block diagram of the control section of the copying machine according to the present invention, and Figure 5 is a sequence judgment diagram. Flowchart, Figure 6 is an example of a circuit diagram that embodies it, Figure 7 is a driving circuit diagram of each device, Figure 8 is a time chart and circuit diagram of jam detection operation, and Figure 9 is equipment operation after jam detection. Fig. 10 is a more detailed flowchart of the sequence '#4j cutting, Fig. 11 is an example of a circuit diagram that specifically implements it, and Figs. 12 and 13 are for correcting changes in flesh quality due to retention copying. Graphs and circuit diagrams, Figure 14 is a time chart of the operation in Figure 13, Figure 15 is an example of the drive circuit in Figure 13, Figure 16 is an example of the drive circuit for the equipment in Figure 3, Figure 17 is is a sectional view of a 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 an accounting system, FIG. 20 is an example of a charger output control circuit, and FIG. 21 is based on FIG. 18. FIG. 22 is an example of the signal generation circuit for FIG. 16, and FIG. 22 is an example of the display of the display of the present invention.
FIG. 23 is an example of a circuit that drives the display in FIG. 22. In FIG. 2, 62.63 is a display, 202.203 is a setting memory, 201, 204 - is a counter, and 217 is a numerical value setter. , 216 is a prohibition circuit. Figure 2θ Figure 4, Figure 21 May 1989 2611 Commissioner of the Japan Patent Office Mr. Kazuo Wakasugi, Minor Case Indication 1988 Patent Application No. 208901 No. 2
Name of the invention Image forming device 3, relationship with the case of the person making the amendment Patent applicant Address Tokyo Metropolitan University I+] 3-30-2 Shimomaruko Name (+00) Canon Co., Ltd. Canon Co., Ltd. (Telephone 758-2111) 6 , Date of amendment order: April 26, 1982 (shipping date) Specification and drawing 7 subject to amendment, Interpretation of amended specification and drawing (no change in content) Commissioner of the Japan Patent Office
Kazuo Wakasugi 1 Indication of the case 1982 Patent Application No. 208901 2 Name of the invention Image forming device 3 Relationship with the person making the amendment case Patent applicant Location 3-30-2 Shimomaruko, Ota-ku, Tokyo Name (100) Canon Co., Ltd. 5, Specification subject to amendment 6, Contents of amendment (1) The following is added after "ru." in line 8 of page 2 of the specification. ``That is, the present invention includes a process means for image formation (FIG. 1), a means for setting the number of copies (217), and various input means (219) including a stop input means for stopping the copying operation before the set number of copies is completed. ), means (FIG. 4) for controlling the copying operation by the setting means and the stop input means;
It has a read-only memory (Fig. 6) for outputting a control signal shown in Fig. 6, and continues the output of the control signal from the memory while waiting for a signal input from the stop input means at a predetermined sequence point with good separation. The image forming apparatus is characterized in that the operation of the process means is stopped by a DHP (DHP), and even if the number of condition signals increases, it can be handled with a simple circuit configuration, and the apparatus can immediately respond to a specific condition signal. can be prevented from stopping. ” (2) “27 on page 13, line 2 of the same
” is corrected to number “2”. (3) On page 21, line 15, after "irradiation", add "The resulting structure is projected onto the screen drum. The two drums are". (4) Correct "all" in line 14 of page 25 to "all." (5) Correct r409J on the 5th line of page 27 to ``201'', and change the word after ``Do'' on the 10th line to ``Therefore, 5TO''.
When P is input, the device can be stopped without feeding the first sheet. ”, and add “Read-only memo IJ” before “Electricity” in the 131st text. (6) Add “(11th
Figure)” is added. (7) Add "This is inconvenient." to the song number for "Accordingly" on page 34, line 4. (8) Correct "12" in line 4 of page 41 by "2". (9) Change “34-45” from page 43, line 6 to “334-45”
Corrected to 345no. (10) Added ``read-only memory'' after ``have'' in the first line of page 44, and added ``read-only memory'' in the 13th line after ``there is'', and added ``This allows for stable storage without requiring a complicated configuration.'' Timing control is possible.'' is added. (11) rlJ on page 53, line 14 and page 54, line 6
to r701J, "To2" on page 53, line 15 and page 54, line 7 to "door 02", and "Door 02" on page 53, line 16.
3" is corrected to "r 703".

Claims (1)

[Claims] Various input means including a process means for forming an image, a means for setting the number of copies, a stop input means for stopping the copying operation before the set number of copies are completed, copying by the setting means and the stop input means; - control means; said control means has a read-only memory for outputting a control signal indicative of a procedure for sequentially operating said process means in accordance with various signals from said wife input means; An image forming apparatus characterized in that, while waiting for a signal input from a stop input means, the output of the control signal from the memory is continued and the operation of the process means is stopped at a predetermined sequence point with good delimitation.