JPS58179865A - Image forming device - Google Patents

Abstract

PURPOSE:To make the operation for changing the number of copying sheets easy, by clearing a memory for storing the set number of sheets or changing the stored content without clearing the memory by control with flip-flops, etc. CONSTITUTION:One of FFs 205, 206 is set and the other is reset by the operation of a key group 218 of a driving circuit for a display for sequential control of image formation. Gates 228 and 229 are opened by the high level Q output of the FF 205 and the output of a key 217 for setting the number of sheets resets an FF 207 with an inverter 232 through a gate 228, then the high level Q' output of the FF 207 enables the writing in the memory 202. On the other hand, the FF 207 is set by the output of a clear key 221 through a gate 229 and the memory 202 is cleared. The clearing and the writing do not take place simultaneously. The set number of sheets is thus changed without clearing the memory and the operation for changing the number of copying sheets is made easy.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image forming apparatus capable of forming a set number of images.

An example of using a numeric keypad and memory instead of a mechanical selector to set the number of copies is being considered.

However, since a clear key is required to change the number of copies, the changing operation can be troublesome.The present invention is intended to alleviate this inconvenience as much as possible.

FIG. 1 is a sectional view of the 11Q copying machine of the present invention, and its mechanical configuration will be described below. Three-layer screen photoreceptor (
In FIG. 16), the end portions are ring-shaped, and the end portions are connected by a connecting band and stretched with an adhesive or the like to an integrated metal screen drum base, forming a screen drum 1, which is installed on a tubular screen drum shaft 2. In addition, in consideration of the application of bias voltage, screen drum 7 lunges made of insulating material are each fixed with screws at both ends of the screen drum 1, and in front of the screen drum 2y, a modulation charger 11 is used for pre-modulation charging. Vessel 1
3 has an opening so that it can be attached to one screen drum. 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 l has a photoconductive member 71 and an insulating member 7 on a conductive member 70 having a large number of fine holes.
2 are laminated so that one surface of the conductive member is exposed. The conductive member is made by weaving gold lI4#1 wires made of stainless steel, nickel, etc. into a net shape. The mesh value of the conductive member is (10
A mesh with a mesh size of ~400° and an aperture ratio of 50% or more is suitable. The photoconductive member is made of vapor-deposited materials such as Ss and gold, and C.
d8, 0 The above insulating member is made of epoxy resin, which is prepared by spray coating, etching, etc. using a dispersion of insulating resin containing particles such as PbO.

It is prepared by spraying or vacuum S-deposition using a solvent-based organic insulating material such as acrylic resin or silicone resin. In addition, it is possible to create a conductive member so that it is sprayed on one side by coating or spraying it from one side of the conductive member, and then grinding the coated member.

Around the screen drum 1, other devices are arranged to form an electrostatic image on the screen photoreceptor. The primary charger 4 is provided to completely eliminate undesirable ghosts and the like on the screen photoreceptor, and the primary charger 4 applies a uniform electrostatic charge vr to the screen photoreceptor. Since the diameter of the screen drum is relatively small, the screen/I
During the formation of an electrostatic latent image on the I & original body, the edge of the image may be subjected to re-**t even though the electrostatic charge has already been formed. Therefore, the four primary chargers are divided into two parts, and the same voltage and current are applied to each with a time gap. The AC static eliminator 6 is provided to remove electricity on the photoreceptor according to the optical image 5 of the original irradiated by the original irradiation lamp 52 . Instead of the main AC static eliminator, a DC static eliminator having a polarity opposite to that of the primary charging agent may be used. Full-surface g-element lamp is used to increase the contrast of the first-order m-image of the screen photoreceptor. Further, insulating drums 8, each having an insulating layer coated in a thin film form on a conductive member, are arranged in parallel with each other in close proximity to the screen drum 1 with a small distance between them. rotate.

Inside the screen drum 1, a modulating charger 11 is mounted on a rail 10 covered with an insulating block 9 installed at the ninth position, facing the screen drum 1 and closest to the insulating drum 8, and a modulating charger 11 is attached to the rail 10, which is covered with an insulating flock 9. Foreshock w4 on shelled rail 12! #Each electrical appliance 13 is installed. In addition, in order to prevent dust from layering on the screen drum 1 and interfering with single-person storage and secondary/L# formation, the air blower 14 and the discharger 15 in the middle are used to remove floating dust from the discharger's back plate). 16, and blow clear air onto the screen drum 1 from the dust removal nozzle 17. Furthermore, if the screen photoreceptor is adversely affected by low temperatures and high humidity, it may be difficult to heat the air being blown by the heat WA18. When obtaining a large number of secondary images using the primary m-image on the screen drum 1, the pre-modulation charger 13 applies a voltage of opposite polarity to that of the modulation charger 11 so that the potential of the primary voltage can be kept constant from beginning to end. It is there to impress.

The secondary m image on the insulating drum 8 is processed by the developing device 20 at 1A.
11. The IA* device 20 includes a toner replenishing device 22, which is separated from a toner filter section 24 by a partition plate 23, and develops 25 toner particles by rotation of a toner distribution roller 26.
II device 20. The developing toner 25 is sufficiently stirred by the rotation of the stirring row 2-27, and the electrostatic fII image on the insulating drum 8 is developed by a sleeve 29 containing a 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 kite rail 32 by driving.

The copy paper is sent out from the top of the paper by a pick-up roller 33 so that it matches the visible image on the insulated drum 8, and is further brought into alignment with the visible image on the insulated drum 8 by a timing roller 34. The image on the insulating drum 8 is transferred onto copy paper via the conveying roller 35 and by the transfer charger 36. Further, the separation charger 37 weakens the attraction force between the insulating drum 8 and the copy paper, and the insulated drum 8 also separates and conveys the copy paper by a conveyor belt 38 incorporating a suction device (1139). The conveyor belt stretched over rollers 41 and 42 rotates and conveys the copy paper while sucking it. is applied to the fixing roller 45.

And the copy paper powder is melted and fixed! lI'Jt-paper is received in tray 47 along 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 indicators 62
, 63.2 pilot lamps 65, 66 and a keyboard 64. Key (A) J (0RIGINAL) on the keyboard 64 is screen drum 1.
It is used when setting the number of times of tS salary to be formed.
If the numerical keys from "0" to "9" are pressed following this key, the contents of the presses will be entered in the display 62.

If the numeric key is entered and the ``~1'' key is pressed, the contents of the display ta62 are cleared and the pilot rung 65 of ``F-'' is lit.

On the other hand, after the r-J pilot lamp lights up, if you make a few key entries, the pilot lamp will go out and the display will be 1!6.
A numerical value is entered in 2. In other words, the numerical data and F-Kan-Jinsha are automatically switched. By the way, the same operation is to be performed indefinitely until the [5TOPJ command (described later) is received.Next, the key rRJ CRETENTION) is formed on the screen and repeated by 91 electrostatic waves. Used when setting the number of copies to be obtained, using the numeric keys or the
The entry for the "-" key is the same as for the "0" key, and its contents are displayed on the display 1a63 or the pilot lamp 66. For example, <123> on display 62, display 6
The key operation when entering <456> in 3 is rO.
J → rlJ → “2” → “3” → rRJ → “4” → “5”
→The order becomes “6”. Therefore, the numeric keys from "0" to "9" and the "-" key are operated by two function keys rOJ,
By switching rRJ, it is possible to arbitrarily enter the 27 display 62.63 or the pilot rung 65.66.

Of course, either the "0" key or the rRJ key may be designated first. Next, rcOJ (CLEARORIGI
The NAL) key is provided to clear the display 62 or pilot lamp 65, and is used to correct numerical data etc. entered incorrectly. Therefore, if you want to correct the entry <123) on the display 62 to <456>, enter rcOJ → rOJ → "4" → r5J → "6".
Just press the key on the face. “cRJ (CLEARRE
The 'rENTION) key also serves a similar purpose and clears the display 63 or pilot lamp 66.

The 5TARTJ key is used to start the copying operation, but the display 62, 63, pilot lamp 65,
If the displayed contents of 66 are in an unreasonable combination, fs
TARTJ key does not work. The unreasonable combination is when the content of the display 62 is <000> and when both pilot rungs 65 and 66 are lit. The reason for the former is that it is impossible to make a copy without forming an electrostatic groove on the screen drum 1, and it is impossible to make a copy without forming an electrostatic groove on the screen drum 1. This is because it is impossible to perform an infinite number of retentions each time the image is formed. Furthermore, once the TARTJ key is activated and the copying machine starts operating, keys other than 15TOPJ will not operate due to a prohibition circuit which will be described later.

If <002> is entered on the display 62 and <003> is entered on the display 63, then modulation, development, and transfer are repeated three times after forming an image on the screen drum, and six copies are made by repeating the cycle again. You can get things. At this time, with the operation of the rsTARTJ key, the above two displays will display <000>, and as the copying operation goes backwards, <000> will be displayed.
01><002>...f: Display.

(Description of operation panel circuit configuration) FIG. 2 is a block diagram of the operation panel circuit according to the present invention. Memory 202. Counter 201 corresponds to display 62 and stores and counts the number of electrostatic 111F drops formed on the screen drum. memory 20
3. The counter 204 corresponds to the display 63, and is used to store the number of sheets given priority by one person 1# and to input an argument. For these cuffs 201, 204, a screen drum counter and an insulated tram collar/4, which will be described later, can be used.

To explain the circuit operation, 217 to 221 refer to a group of keys on the operation panel, and these switches have an input inhibit circuit 216.
This signal line 21 is gated with the output signal 214 of
4 is normally at the 11" level, but when the inhibit circuit 216 is loosened, it goes to the "0" level and does not output even if the key group is operated.
゜211 and two OR groups) 222, 223. rsTART for each of the above 7 rigs and 70 rugs
The J key was pressed, (the STOPJ key was pressed,
It remembers jams such as too much paper, feeding two sheets of paper, and poor separation of paper. 1.Flinog @ 70 Tubes 209 and 210 are both never set, and when one is set, the other is sent. In other words, the 5TART instruction and the 8'l'OP instruction do not work at the same time. Also, Flip・)0 Tsubu 2
When 11 is set, 2 lips, 70 horns 209°210
must be reset so that all operations are interrupted when paper jams. Normally, the outputs of 222 and 223 are at the level #, "pi, @0", but when clip 7
When one of the 0 knobs 209, 210, and 211 is set, these are 10''.

Inverted to "L" level. That is, the rsTARTJ key.

[5 When either the TOPJ key or the JAM wisdom is in operation, the prohibition circuit 216 is activated and the signal #214% is activated.”
0", (*1I215!>C"l'Kl, 6° Therefore,
At the same time the keys 217, 218, 220° 221 on the operation panel are disabled, the gate 225° 226 is closed, and the 22
4,227 opens display 62 display 63 shows memory 20
2. Replacement counter 20 with the contents of memory 203
1. The contents of the counter 204 are displayed at 0, and during the copying operation, keys other than the [5 TOPJ key do not work. Therefore,
[8TARTJ At the moment when 4- is activated, the counter is still zero, so the display 62 shows <002) → (000>,
63F 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 complete, each counter is cleared to zero in preparation for the next operation and displayed! 62.63 displays the numerical value of ^hi memory.

When the rsTOPJ key is pressed at any point during the copying operation, the operation is terminated at a good point in the process, 9, from that point on.

Next, the presses of the "0" key and "R" key on the clip/70 knobs 205 and 206 are memorized, and neither of these keys are set; when one is set, the other is always reset.

Now, when the "0" key is pressed, 7 rips 1170 ts 20
5 is set, game) 228, 229 open, followed by m
When any key in the negative key group 217 is pressed, if the pilot lamp 234 is lit by the gate 228 and 207, the pilot lamp 234 is reset by the signal 9232 and the lamp is turned off. l-J instead
When the key 221 is pressed, the gate 229 sets the A trip flop 207 and the pilot lamp 234
At the same time, if there is any numerical value already in memo +7-202, it is cleared with signal #1233. Therefore, the entry of a numerical value into the memory and the ``success'' instruction are never satisfied at the same time, and if one is true, the other is always not true.

Refreshingly, when the "R" key is pressed, 7 rip-flops and 20
5 is reset, clip flop 206 is set, and games 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 the memory 203 through , and the r116J key is gate 2.
30 and sets the flip-flop 208 (the illumination lamp 235 is illuminated. This also means that if the memory 203 is entered, the flip-flop 208 is set).
If 8 is reset and reversely set, the memory 203 is cleared, and therefore the entry of numerical data into the memory and the [■] command are automatically switched to . Also, 1? l
Two types of memory 2 by WA key group 217 and 221
An input can be entered into the o2° memory 203.

(Relationship between sequence and machine operation) Figure 3 is a time chart showing the operation sequence of the copying machine in Figure #I1, and the command from the operation panel is 0RIGINAL.
<002) RETENTION <002>. First, at the same time as turning on the power switch, the cleaning motor 32ρ for collecting residual toner dropped from the insulated drum and for driving the conveyor belt, the screen dust collector 15 (Fig. 1), the screen dust-proofing 7 ann 14 (first
)*2 screen heaters 18 (11th) Ii3
) and current device j1 that sucks toner floating in the current device
The seventh engine 325 starts driving and continues with Kaya turning off the power switch. However, one screen heater is 11P1
Turn off when the electrostatic #me formation of the eye is completed.

Next, when the 5TARTJ key to start copying is pressed, the screen drum motor 301 rotates once.

At this time, the reciprocating clutch of the optical system is activated, thereby driving the optical system synchronously with the screen drum. 1st
In the figure, to explain the mechanism of the optical system, the document illumination lamp 52 on the JJA 8% glass irradiates the image, and the first reflection mirror 53, which is installed integrally with the document illumination lamp 52 and the lamp reflection mirror, It moves at a speed V that is mutually synchronized with the circumferential speed of the drum l. Use a screen to illuminate the original illumination lamp.
The drum motor rotates once at the circumferential speed during driving, and when it turns off and the insulated drum motor turns on at the same time,
Instantly, the speed of both drums increases to approximately twice that.

While the screen writing drum motor 3010 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.

Father, at the same time the l-8TARTJ key worked, the powder transfer charger 369 paper m charger 37. Insulated drum static eliminator 50
and paper separation suction fan 319 (FIG. 3) is turned on and turned off at the end of the operation. However, since the chargers 36, 37゜50 marked with # have a peripheral speed of the screen drum motor and the rotational speed of the insulating drum is slow, the extra l'[l
Increase the potential by F so that fr does not charge on the insulating drum (
ala Figures 317, 318, 321).

Next, after the first image is formed, the screen drum motor is turned off and the insulated drum motor is turned on, and copying operations such as modulation, machine transfer, one paper transfer, and the like start. 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 the conveyor belt 38 (FIG. 1) and the conveyor roller clutch 3 for transmitting the force of the cleaning motor 320.
16 turns on. As the rotation progresses and the screen drum reaches its home position 80', the screen drum
The variable TA Teiden 63ii, which transfers the electrostatic ffi formed on the drum to the insulated drum, is turned on, and at 310 degrees, the paper feed roller clutch 314, which feeds one sheet of paper on the paper feed tray, is turned on. death,! ! At 135σ, the reversible toner bridge prevention motor 312 and the reversible toner bridge prevention motor 313 for stirring the toner staying in the developing device are turned on. After the screen drum starts modulating, 2i! ! Enters the Ill IcJ rotation cycle, and at the 3σ position, the paper feed roller
The clutch 314 is turned off, and the timing roller clutch 315 is turned on in order to align the leading edge of the fed paper with the leading edge of the IJt rowed Kubo-gazu on the insulating drum. If the number of copies is one, the M modulation charger 310. The modulation charger 311 turns off, but in this case there are two sheets, so it does not turn off.Proceeding further, at 310 degrees, the paper feed roller 2 lever 314 is turned on to feed the second sheet. At 360°, turn off the first timing roller clutch 315. Entering the third rotation cycle,
At 30°, the paper feed roller/clutch 314 is turned off, and the second timing roller/clutch 315 is turned on.

At 80°, the pre-modulation charger 310. Transform P Teidenki 311t off. If one copy is to be made, then turn off the printer 312 and the toner bridge prevention motor 313. Turn off the timing roller clutch at 360°.

Entering the fourth rotation cycle, developing motor 31 at 8σ
2 and turn off the toner bridge prevention motor 313. 3
Insulated tram motor 328 and transport roller Clara at 60゛? 316t turns off and ends the retention cycle 0 Separation pawl solenoid 329 that separates the paper from the insulated drum
In Fig. 1 73), the leading edge of the paper is the luff 69 and the light receiver Takako 70.
(@Figure 1) By counting the pulse needles from the time when they pass through the gap, the plow is set at the position shown in Figure 3.

When all the copying operations are completed, the electromagnetic brake 321 is depressed for a certain period of time to stop the tram from overrunning. (Explanation of Sequence Control Circuit Configuration) FIG. 4 is a block diagram of the control section. From the outside, there are signals from the keyboard that issue operation commands, a detection signal for the home position of the screen drum that serves as the reference for the sequence, a signal from a nine-pulse generator that synchronizes with the rotation of the insulated drum, and - the timing for forming a human image. The six micro Φ switch signals to be determined 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.

The screen drum home position is determined by detection pulse 330 (third
As shown in FIG. 1, the magnet 68 on the screen drum and the magneto-electric transducer 67 (FIG. 1) provide a signal every time the screen drum rotates once. Judgment pulse (1) 331 is obtained during the home position of the screen drum after the electrostatic m-image formation on the screen drum is completed and the optical system returns again to its home position MSl3, At the generation time of this judgment pulse (1) 3310, the aforementioned memo IJ-
(By determining whether +1202 and the screen drum counter 409 are equal or not, and whether or not the 5TOP command is issued, the insulating drum motor is started and the flossing process for forming the secondary latent image is started, or -next Decide whether to restart S image formation or stop the screen drum motor to end the sequence.

If the above conclusion is expressed on a 70-chart, it will look like Figure 5. In other words, the above decisions are sequentially [stocks], Φ).

Indicated by ■. Furthermore, when this flowchart is expressed as an electric circuit, it becomes as shown in FIG. If the vertical bus line t column and the horizontal bus line are defined as twins, control commands indicated by ◇ are connected to columns 601 to 604, respectively. This signal is also inverted by inverters 605-608 and sent to columns 609-61.
Connected to 2. Lines/613 to 617 are connected to the power supply through resistors. This power supply must be at a level equal to logic level 11''.

For example, in the row O in FIG. '', so if this is expressed as a logical formula, it becomes @0-FSTOP・F8--IL=0'. Therefore, by connecting diodes to each of columns 609, 610, 611 and 2-in 615 in the direction shown in the figure, it becomes AND.
A circuit is formed and the forces 09, 610, 611 are
When the level is '1', the line 615 becomes the "1" level. In other words, the condition ``■'' is satisfied and the line 615 becomes 11'' during running.Similarly, the condition ``Q~■'' is established when the line 613~
617. Further, lines 613-617 are inverted by inverters 618-622, and lines 623-627 are inverted.
connected to. Columns 628 to 630 that intersect these lines 623 to 627 are connected to the power supply E through resistors, and again ζ
If a diode matrix is formed here, line 63
1 only when the condition of 0 and Mori [[exist] or ■] is satisfied.
The output 644 of the inverter 633 becomes 1+@'' according to the logical formula, and becomes @1 level only when the above-mentioned condition is satisfied.

Therefore, this is the control pulse (1) F J 1 and the screen drum home position bar A/ which is the separation point of the operation.
If xDHP is passed through the gate 638, an operation command ``■'' to end the sequence can be issued and the memory circuit can be latched. In the same way, it becomes possible to issue the command signals of ■■. [Corporation] signal, the aforementioned charger 36,
The output acid of 37.50 is lowered as shown in FIG.

The condition to become @ is now established and it is 01! When the signal is obtained, the screen drum motor is turned off, the insulated drum motor is rotated, the drum O speed is switched to the speed, and the disk 59 is rotated by the gear in synchronization with the citram. Then, the signal g generated when the hole made on the circumference of the disk 59 passes through the gap between the pair of light emitting element and light receiving element 60 is extracted as a clock pulse 332 (FIG. 3).

This clock pulse generates one pulse per revolution of the screen drum, and 360 pulses per revolution. 1 with rK on the same diameter disk as the screen drum
Since it is difficult to drill individual holes, a separate disk is provided.
The rotation of this disk is made n times that of the screen drum by a gear, so that the number of disks is reduced to 1/n.

In this device, in the process after modulation, this clock pulse is processed and used as a driving signal for the device. The insulating drum completes one rotation, and from the second copy onward, copies are made every half rotation, so by setting the reference for sequence completion as one half rotation of the insulating drum, that is, one rotation of the screen drum, the υ clock pulse 332 Niiya, 2 clowns 36
Work the 0 way kakunta, 333-345 on w43 diagram
This is the part that outputs the 0 control pulse.

An example of a circuit for generating this control pulse is shown in FIG. Inherit 70 flips and generate clock pulses from 0 to 3
Form a 360-decimal counter that counts 59 selections. The first four 7-ribbon 7a-tubes indicate the 1 digit and repeat the count from θ to 9. The next four 7-ribbon 7a tubes indicate the 10-digit and count from 0 to 9. A decimal counter that repeats , showing the last two digits of 1100, and is a three-way counter. However, when the count advances from 0 and changes from 359 to 360, a set signal is output from the decoder to the head, and all 7 lip-flops are set to 0. In this way, a 36040 counter is obtained that repeats the count from 0 to 359 every rotation of the screen drum.

#I3 The control pulses 333 to 3450 in the above-mentioned cuff/
The output of the tar! It is generated by decoding with the matrix path (decoder) shown in FIG.

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

For example, the combination of four microphones and a cam is 1141.
It is easy to make delicate adjustments such as impossible paper feeding timing and register storage between the leading edge of the paper and the developed image on the drum. Vessel 3
10 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 2
In the case of 80 counts of the third cycle, it is necessary to select a control pulse in order to turn it off at the 80th count of the third cycle.

Inventiveness, two insulated drum forces fy as shown in Figure 4 ;/
, J IC, IC' is used to determine the pulse (!) Kinriki ra
y) and compares the count value with memory (2) to facilitate selection. That is, the 347 insulated drum counter''' IC which counts 11' from the second cycle is activated, and if the memory (2) that stores the desired number of copies and the counter values are equal, an on signal is generated for that cycle. Therefore, this counter is stopped. However, for example, the timing book roller ri 2nd paper operates for the first time in the 2nd cycle. However, the insulated drum counter IC and memory (2) By comparison, the above counter is already equal to the memory (powder) in the third cycle, so we compare the insulated drum counter Iσ and the memory c smell, which counts up 41 cycles/t behind the counter of this clutch for the second sheet of paper. This is to control 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' stops counting in the fourth cycle (0, which matches the memory). The insulated drum counters (1) and (2) coincide at 2
Clear the two counters and check again whether the screen drum counter matches the memory <1) that stores the desired number of latent image formations. If they match, issue a copy end command and stop the drum rotation. stop. If they do not match, turn off the insulated drum motor mentioned above and replace the scree/
Rotate the drum motor to start exposure, and repeat the same sequence after forming the image.

@Figure 16 is a diagram showing an example of drive control of each device, and 310.
312, 314. 315 Service #I3 In the figure, there are paper feed roller clutch, pre-modulation charger, developing motor, timing roller clutch, 160 is an amplifier that operates these, 1
67.170 is the gate of frig 70 tube, 161,1
168 is an inverter, 162 is a Nant gate, 163 is a NOR gate, and 165, 167 is an AND gate. When the -* of the above-mentioned Kakunta IC, IcO & numerical setting memory (2) is determined by each matching circuit, the on-pulse is stopped and the device is stopped by the off-pulse, and the device can be controlled at a predetermined timing. be.

Next, the case where the transfer paper jams will be explained using diagram @S.

If the paper gets jammed in the conveyance path, or if the paper does not separate properly after transfer and is stuck to the insulated drum and moves, the paper may be damaged by 2.
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 (8GI), the light receiving element 70 picks up the pulse of the clock pulse generator and starts the jam cuff/tar, and when the leading edge of the paper intercepts the light source 71 (SGO), the light receiving element 72 detects this pulse. A separation confirmation detection pulse 8DP is generated by decoding the output of the counter.

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 is jammed in the conveyance path or cannot be separated, the paper will not clip the light source 71 even though the separation detection pulse is output. Therefore, as shown in figure b! A jam signal JP is output from the circuit.

In figure b, 81 is a gate, 82 is a 7-rib drop, and using this counter, the separating claw 73 (g
It is possible to output a pulse signal from a gold metering decoder to create the timing for operating the pulse signal (Fig. x).

The sequence control unique to the present invention after jam detection 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. The repair counter display remains at 11, which is the number counted at the time of the jam. When the repair is completed, r8TARTJ =? again. Press - to rotate the screen drum motor, rotate the screen drum to its home position, and turn on the screen drum motor at the home position. Since the electrostatic IIF 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 diagram #I9. In the sequence after modulation, whether it is the first 1 & I or the first restart after a jam, the insulated drum must make one rotation (screen drum 3 rotations). Therefore, when restarting after a jam, it is necessary to stop the insulated drum counters ICI and IC2 and leave them at 9 to create the timing for the 1&th sequence after modulation. For this purpose, as shown in Fig. 9, in the @if cycle and the second cycle of the sequence, a prohibition time l and a stop time are created, thereby controlling the first sequence. The count-up of 2 and 2 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
The 9th sheet jams and falls asleep 9 Insulated drum counter 1 (
IC) and 2 (IC) ~ memory (when jam, ■IC
=Memory (Jam when ■, ■IC'■ Jam when Memory (2) is below, 0 indicating the movement color of the counter to restart after jam. Memory (set to 2).

■ Jamster)
In the case of St cycle ■, it is the third cycle t) 1. C
, IC' both count up, in the case of 0■, only IC' is counted up in the M3 cycle, becoming IC-IC', and ends at the end of the third cycle.
Even if cycle A- is entered, the count does not increase, and the end of the third cycle is confirmed to be KIC=Iσ, and the process ends. ■ and ■ end up in the same cycle, but this is because the jam occurs near the paper leading edge detector due to a 12-fall feed, etc., or when the same paper is jammed due to poor separation of the paper, etc. This is because there is a difference between ■ and ■ depending on the time difference.

This section describes how to control sequences using analogical time 1 (INHI) and 2 (INH2). In the sequence at the beginning of the jam aNli, the first 1 & must be 4 double zeros in any case, so at the stop time l, the aio in Figure 3
~3140 machine 11 @ company and turn on the car at the right timing. 315% INHI-INH Turn on at the appropriate timing of 20 hours (inversion of INHI line INH *-
wz>. Next, at the time of INHI/INH2, it is 310,3
11 is compared with the contents of the counter IC and the memory (2), and if they are already equal, it is turned off, and 314 is also not turned on, if they are equal. Since INH2 and later recycling is controlled by the IC and IC' counter forces as described above, it is controlled by comparing the memory (2) with these two counters, similar to the 11 control in the normal case.

The circuit that generates the above inhibited time signal INHI, 2 is @1
As shown in Figure 8a, 181 and 182 in the figure are 79 Tsug 7.
a, 183 and 184 are gates, FR8TRT is a start signal related to the start of rotation of the insulating drum, FJ2 is a judgment pulse (2), and gates 183 and 184 are used to INHI, ! at the timing shown in FIG. 9. Output. Driving the 41 & device and stopping the counter during the prohibited time of Jin is the 21st
It is controlled in one line as shown in the figure. The on and off pulses in the figure are the same as the sequence pulses in figure $3. A method similar to that of the judgment circuit shown in FIG. 6 is adopted. As is clear from the foregoing discussion, each cycle of the modulation cycle occurs with a corresponding number of counts of 36 clock pulses (corresponding to one cycle of the lk counter, but rather than using all 0 of them). By turning on or off the related 116 Lattekan 7 Lips 7a only in cycles where the conditions are met, it is possible to create a flow that loops the madness counter θ~359.This 7o- The outline of 70- is shown in Fig. 1, and if this 70- is expressed as an electric circuit, it becomes 1111011.As described above, 7a-, which is a program of a series of sequences based on the pulse count, is created from two blocks. It can be incorporated into a nine-way circuit with a diode matrix and an inverter.
becomes possible to control. In Figure 10.11, Se
5 is the pre-modulation charge ridge turn on, Re et FCl
2 is a command to turn off the drive of the paper feed loop, Set FCl4 is a command to turn off the drive of timing low 2, and FR
8TRTFI Whether copy modulation starts after modulation, FI
It is also O to judge whether the poem is i-retention or not.

(The blank space in Figure 10 is also blank) Similarly to 70- in 30, an operation command for the required equipment at the count can be output.

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

Next, we will talk about the means for stably performing retention. As the number of retentions increases, the electrostatic latent image formed on the screen will naturally discharge its charge and the potential will decrease, resulting in a 3J image. #A Both images are affected by image 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 the image due to the drop in potential. In the case of this device, as shown in Figure 812, the potential of the first sheet is higher than that of the second and subsequent sheets, and then the 10&@, 30th sheet, etc.
The potential is increased stepwise at the 50th, 70th, and 90th sheets.

It is possible to raise and lower the potential by varying the input voltage on the primary side of the high-voltage transformer.For example, using Figure 13 as an example, this can be done by connecting six resistors in series and using a relay that operates as the number of retention increases. The potential is increased by short-circuiting the resistor to J11. You can connect the resistors in series, or you can connect different resistance values in parallel and switch each one.

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
Since the potential is changed at the &th, 30th, 50th, 70th, and 90th sheets, the modulation charger on-pulse was gated with the decoded output of the insulated drum counter (1), as shown in Figure 15. The timing is what activates the relay. Therefore, the 2nd sheet is IC = 1°, the 10th sheet is IC = 9.3
0th card is IC = 29. 50th card is IC = 49.70 & 2nd card is IC-69, 90th card is IC = 89, a pulse = 80 counts, and the relay receives activation pulses 1 to 6. It is output, sets 2 bits 1 to 6, and relays Kl~
6 coil is activated.

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 layer image, and 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. During the step of electrostatic latent scratch formation, the subsequent 11! Ki! j'
! It doesn't really matter. Therefore, when accounting for copying fees in a copying machine such as Ren, in addition to charging fees differently depending on the quality of the copying paper and the quality of the copying paper, as with conventional copying machines, An accounting method is required that takes into account the process of forming the primary latent image and the subsequent process up to transfer to copy paper. An example of this is shown and explained in FIG. The number of steps in which secondary latent scratches are formed on an insulating drum, the electrostatic latent image is developed, and the developed image is transferred to copy paper (this is totaled to correspond to the number of copies of 9 copies) )
The other numbers correspond to the numbers in Figure tK2 (operation panel block diagram).

Let's explain its operation. Expose lLi1i, and screen IJ-
When the count-up switch 241 is repeatedly turned on and off every time an electrostatic S is formed on the drum, the counter 201 is turned on and off.
And the value of the total counter 191 increases by one. The counter 201 is cleared when the apparatus repeats a series of copying operations and the contents of the memory 202 match the preset number of copies. However, the total counter 191 continues counting even for the next copying operation without being cleared. When the number of copies is newly set after replacing the JILiii+, the counter 201 starts counting again from 1 to 2.3, etc., but the total counter 191 counts up to the previous value + 1. Start counting from. Further, each time the count-up switch 242 in the process of forming a secondary latent image, developing it, and then transferring it to a copy paper is turned on and off, the counter 2G4,)-tal counter 192, respectively, 201, nine operations are performed corresponding to the total counter 191, and the total counter 201 continues to count the total number of copy sheets copied without its contents being 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 visible transfer to the copy paper are calculated separately, and the number of times the electrostatic latent image is formed on the screen drum is calculated separately. Collect needles at different counters at different rates. By accounting for copying charges as described above, when a large number of copies of the same 'arit are made, the cost of copying becomes cheaper as the number of copies increases.
An accounting system that takes advantage of the features of the present invention is achieved.

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 table 2 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 (-).

Also, the example of what is necessary for a copying machine is the optical system, dust mechanism, transfer system, etc.9
I411! If the l path fails, for example, the optical system control path (
When countermeasure 48) fails, as shown in Figure 22 (turn),
The first letter of ailure (#)'F8 will be displayed. If you notice a machine malfunction by looking at the Azer smoke, and at the same time report the malfunction to the manufacturer's service department, the nurse can quickly 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 there is no paper, P p rs E
If you have a large number of cassettes containing 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, KPE3 is displayed as shown in Figure C.

Note that even a two-digit display can be displayed as F3.

Furthermore, there is no developer used for development (DE
kll, the color is I E 1@) can be displayed. The initial letters used in the above description to indicate each state are not limited to the above examples.

One path as a switching means for displaying the above will be explained with reference to FIG. 23. #I2 diagram uses the display device that displays the count of 4 sheets and jams (for example, displays 1J")
And the jam location is displayed numerically (for example, 11'', 12''), and one display device can easily serve both as a counting display and a jam display.

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

706 is a flip-frog that outputs a 2-over signal indicating the jam location; 707 is a detector that detects the jam location Ii;
08 is an encoder that converts the detection signal into a binary coded decimal output, and 709 is a 7-bit 170 block that outputs a jam signal.

One or more jam detections 11707 (use the switch to number them in advance). For example, 01 is near the timing roller, 02 is near the paper separator, 03 is near the fuser...
), the number is converted to a binary value by an encoder 708 and the output is input to one or more flip-flop details 706 corresponding to the binary weights.

In addition, the encoder 708 outputs a jam detection signal 710 to set a flip-flop 709, and the output of this flip-flop 709 is used to switch the jam display of the counting device l. The content of passes through Goo 12, and the output of the flip-flop 706 converted into two passes through gate 3 and becomes binary 1 at decoder 705.
゜Evolved and displayed on a display device.

For example, a case will be described in which the JAM detector of JII&2 is activated and @JO2''' is displayed on the display device consisting of three digits.

When JAN detector A2 works, encoder 708)
The 1-2 7 lip-flop (F2) and the flip-flop 709 are set, the counting of the count value t1 is stopped, the gate 2 is closed, and the gate 703 is opened. Then, the contents of Aritub 70 and Tube #706 are passed from gate 703 to gate 704, and numerically displayed by decoder 705 in the last two digits of the display device. The output of the flip-flop 709 goes directly to the decoder 705, where it is encoded into the letter "J" and displayed on the most significant digit of the display.

The above description has been made using an example of a device for transferring a visible image onto plain paper. However, the present invention is a so-called copying device that directly transfers a visible image formed on a photoreceptor by exposure to light onto plain paper and develops it to produce a copy. T.E.
It exhibits excellent effects both in those using the 81 method, and in those that directly transfer secondary A documents on an insulated drum onto plain paper and develop them to make copies. ,
This is also effective in general copying machines that perform AN for a set number of sheets.

[Brief explanation of drawings]

1 is a schematic sectional view of a copying apparatus according to the present invention, and FIG. 2 is a drive path of a narrow indicator in a copying apparatus according to the present invention;
Figure 93 (- is a time chart of equipment operation in the copying apparatus according to the present invention, Figure 4 is a copying machine according to the present invention.
Fig. 5 is a block diagram of the control unit of c(il), Fig. 5 is a flowchart of 71 case/case judgment, Fig. 4. The figure shows a time chart and circuit diagram of jam detection operation, Fig. 9 shows a time chart of +IA device operation after jam detection, Fig. 1θ shows a detailed flowchart of j!tance judgment, and Fig. 11 shows it in detail. 1812, Fig. 13 is a graph and circuit diagram for correcting image quality changes in retention copying, @ Fig. 14 is a time chart of operation in Fig. 13, Fig. 23 is a diagram of Fig. 22 An example of a drive circuit, Fig. 16 is an example of a drive circuit for the device in Fig. 3, Fig. 17 is a cross-sectional view of a screen photoreceptor, Fig. 18 is an example of a stoppage time signal generation circuit in the event of a jam, and Fig. 19 is an example of a drive circuit for the device in Fig. 3. A schematic diagram of the accounting system, FIG. 20 is an example of a charge repellent output control circuit, FIG. 21 is an example of a signal generation circuit for FIG. 16 using FIG. 18, and FIG. 22 is an example of the display of the display of the present invention.
Figure 23 is an example of a circuit that drives the display in Figure 22. In Figure 2, 62.63d is a display, 202.203 is a setting memory, 201 and 204 are counters, 217 is a numerical value setter, and 216 is a prohibited road. Bureau? Mr. Kazuo Wakasugi, Director General of the Doguchi Agency, JJ Agency 1. Display of 1Nji1 1982 Patent Application No. 208904 2 Name of the invention Image forming device 3, relationship to the case of the person making the amendment Patent applicant address 3-30-2 Shimomaruko, Ota-ku, Tokyo Name (100
) Canon Co., Ltd. Canon Co., Ltd. (Telephone 758-2111) 1982
April 26, 2017 (shipping date) 6. The specification and drawings to be amended 7. The engraving of the specification and drawings to be amended (no change in content). Procedure Amendment (0 Vision 1, Indication of Case Patent Application No. 208904 of 1983 2, Title of Invention Image Forming Device 3, Relationship with the Person Making Amendment Case Patent Applicant Address 3- Shimomaruko, Ota-ku, Tokyo) 30-2 name (100
) Canon Co., Ltd. Representative: Ryu Kaku, Department 4, Agent address: 3-30-25 Shimomaruko, Ota-ku, Tokyo 148, Specification subject to amendment 6, Contents of amendment (1) Scope of claims of the specification shall be corrected as shown in the attached sheet. (2) Add the following after "ru." on the second line of the second page. ``In other words, the present invention provides keys for inputting data for repeated copying (217, 218 in FIG. Memory for storing data (202, 2
03, 207, 208), a control means (FIG. 4) for executing the display operation and image forming operation of the display, and a clear key for clearing the information stored in the memory (
220) and a circuit (FIG. 2) that allows other sheet number data to be set without inputting the clear key. ” (3) Correct “27” in the second line of page 13 to “2”. (4) On page 21, line 15, after "to irradiate", "The structure is projected onto the screen drum. The two drums are..."
Add. (5) Correct "all" in line 14 of page 25 to "all." (6) On page 27, line 5, r409J was corrected to ``r201'', and after ``do'' on line 10, ``therefore, 5TOP
The device can be stopped without feeding the first sheet during input. ” and “of read-only memory” is added before “electricity” on the 13th line. (7) Add "(Figure 11)" after "59" on the third line of page 30. (8) Add ``This is inconvenient.'' before ``Therefore,'' on the 4th line of page 34. (9) Correct "12" in line 4 of page 41 by "2". (10) Change “34-45” to “334” on page 43, line 6.
~345''. (11) Added ``read-only memory'' after ``had'' in the first line of page 44, and added ``in a read-only memory'' after ``have'' in the 13th line, ``This allows for stable storage without requiring a complicated configuration.'' Timing control is possible.'' is added. (12) rl on page 53, line 14 and page 54, line 6.”
to r701J, "G2" on page 53, line 15 and page 54, line 7 to r)702J, and "3" on page 53, line 16 to r703J. 2. Claims 1L Cover 1

Claims (1)

[Claims] a key for setting the number of sheets, a display for displaying a numerical value, a memory for storing the number set by the key, a control means for displaying the number set by the key and performing an image forming operation, and a setting stored in the memory. An image forming apparatus having a clear key for clearing the number of sheets and a circuit that allows setting another number of sheets without inputting the clear key.