JPS63264774A - Image forming device - Google Patents

Abstract

PURPOSE:To simplify an operation to be executed when position correction is made at the time of copying, by allowing a shifting means to carry out shifting operations of a prescribed quantity when a recording medium processing means is selected. CONSTITUTION:This image forming device is provided with a means which forms an image on a recording medium, means 100-102 which input data for shifting the position of a reproduced picture recorded on the recording medium from a reference position, and means CNT for holding data from the input means. A CPU shifts the position of the reproduced picture from the reference position by controlling the timing of an image forming means in accordance with data held by the holding means and simultaneously, allows a shifting means to carry out shifting of a prescribed quantity when the use of a recording medium processing means which process the recording medium after a picture is formed on the medium by means of the image forming means is selected. Therefore, picture position shifting can be performed automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image forming apparatus that can change the position of a reproduced image formed on a sheet.

A transfer type electrophotographic copying apparatus will be explained below as an example.

Conventionally, in such copying apparatuses, the timing of starting paper feeding is fixed for sequence control, regardless of the position of the original document on the platen. In this case, the document must be placed precisely in a predetermined position. If the original is placed misaligned, a misaligned image will be formed on the transfer paper.

Therefore, in order to form an image in the center of the paper, it was necessary to open the platen cover and replace the document.

In addition, for manuscripts with writing or printing that is unevenly written or printed on the leading edge or the trailing edge, a method is used in advance to place the manuscript off the designated position on the manuscript table so that the copied image does not fall outside the area of the transfer paper. However, it is troublesome to reposition the original for slight positional correction.

Furthermore, when binding a plurality of copies of transfer paper, the characters, etc. in the bound portion may be hidden and difficult to read.

The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide an image forming apparatus that can automatically shift when a device for processing a sheet discharged from the image forming apparatus is selected to be used. That is.

That is, the present invention includes means for forming an image on a recording medium, means (100 to 102) for inputting data for shifting the position of a reproduced image recorded on the recording medium from a reference position,
Means for holding data from the input means (No. 10-1)
CNT), and means for controlling the timing of the image forming means to shift the position of the reproduced image from the reference position according to the data held in the holding means (see FIG. 8CP).
U) and a recording medium processing means for processing the recording medium which has been imaged and discharged by the image forming means, and when the use of the processing means is selected, the shifting means shifts a predetermined amount. An object of the present invention is to provide an image forming apparatus that can

With this, a margin for stapling, etc. can be automatically created without any extra operations.The present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view of a copying machine according to the present invention, and 1
moves back and forth on the platen on which the original is placed.

2 is a rotatable drum having a seamless photoreceptor on its circumferential surface; 3 is a lamp for exposing the original image on the platen 1 to the drum 2; 5 is a corona charger that charges the photoreceptor surface positively in advance; 6 is an exposed image. and a corona charger that removes negative charges from the surface of the photoconductor; 8 a developing device that develops the electrostatic latent image;
9 is a charger for transferring the developed image onto transfer paper 10; 11 is a cassette storing a large number of transfer papers 10, which can be detached from the main body; 12 is a stand for manually feeding the transfer paper 10; 13 is a cassette for transferring the transfer paper from the cassette. The roller to be fed, 14 is the manual feed tray 1
2 is a roller that feeds the transfer paper, 15 and 16 are microsinches that detect manual transfer paper, 17 is a registration roller that aligns the leading edge of the transfer paper with the leading edge of the drum image, and 18 is a roller that separates the transfer paper from the drum. 19 is a belt for conveying the transfer paper, 20 is a fixing roller, 21 is a roller for discharging the transfer paper onto a tray 22, 23 is a blade cleaner for removing residual toner from the drum, and 4 is a blade 23. A magnetic roller 7 collects the removed toner, 7 is a container that stores the toner collected by roller 4, 24 is a negative corona charger that removes the residual charge on the drum, and 25 is a device that directly exposes the drum to light from exposure lamp 3 for a certain period of time. A shutter for applying the light from the lamp 3 to the drum surface, 26, and a mirror 27 for applying the light from the lamp 3 directly to the drum surface will be explained below. When the main switch is turned on, the motor that drives the drum 2 is turned on, the lamp 3 is turned on, the shutter 25 is opened, and at the same time, the corona charger 6 is turned on and the drum 2 is rotated. Thereby, the drum surface is previously cleaned of residual toner, residual charge, and memory. When the fixing roller 20 reaches a fixable temperature by an internal heater, a copy enable signal is generated. If the copy switch is not turned on, the drum continues to rotate, and the drum stops when a predetermined number of pulses from a rotary encoder, which is provided in the drum meandering system and generates η pulses per rotation of the drum, is counted. The above rotation of the drum is referred to as a first pre-rotation.

When the copy switch is turned on while the drum is rotating or stopped, the shutter 25 is closed and the drum 2 is rotated again. After about one rotation (hereinafter referred to as the second pre-rotation), the platen 1 starts moving forward and the original on the platen 1 is exposed. be done. The photoreceptor of the drum 2 forms a high-contrast electrostatic latent image on the drum surface using light from an insulating surface roller 26 from the surface. Toner is applied to the latent image in the development area and the latent image is developed. The visible image is transferred to the transfer paper by the positive potential of the transfer charger in the transfer area. One sheet of transfer paper is separated and fed from the cassette 10 by the timing operation of the paper feed roller 13, and is passed through the transfer area by the registration roller 17 at the same speed as the circumferential speed of the drum. After the transfer, the transfer paper is separated by a roller 18, sent to a fixing roller 20 by a belt 19, where the image is fixed, and then discharged onto a tray 22 by a roller 21.

After the transfer is completed, the drum surface is subsequently cleaned by a blade 23, static electricity is removed by a charger 24, and electricity from the memory is removed by light from a lamp 3 via a mirror 28.

When making continuous copies from the same original, there are magnets 29 on platen 1 for the number set using the numeric keys on the copying operation section.
There is a reed switch 30, 31, 32, 35 on the platen movement path that is moved by the passage of the magnet.When the magnet turns on 35, the document table is stopped at the initial position in the center of the main body, and when 30 is turned on, the document table is stopped. Switch the table to forward movement to the right for exposure. 32 is a switch for feeding paper by the registration roller 17. In the case of continuous copying, when the first slit scan is completed, the document table moves backward and the switch 30 is turned on, the document table starts moving forward again and performs the second scan. In this way, the set number of copies will be made.

Lamp 3. The simultaneous charger 6 is turned on and off in synchronization with the rotation of the main motor, that is, the drum, and the primary charger 5. The front charger 24 is turned on except for the rear rotation cycle. Incidentally, the lamp 3 is controlled to have a strong luminous intensity while the document table is scanningly moved.

In the case of manual copying, when a sheet is inserted from the table 12, the detector 15 detects the sheet. Then, the feeding roller 14 is turned on to take the sheet into the machine. However, the low 214 is not turned on for a certain period of time (approximately 2 seconds) after the detector 15 detects the sheet. This prevents oblique insertion, corrects the sheet to be straight, and allows time for sheet replacement. When that time has elapsed, the roller 14 is turned on, the drum 2 is rotated, and a process sequence similar to that in the case of turning on the copy switch is started. Furthermore, the detector 15
By starting the second pre-rotation of the drum 2 at the same time as the sheet is detected, the start of copying can be brought forward.

Further, when the detector 15 detects sheet insertion, feeding of the sheet from the cassette is blocked. By simply inserting the sheet as described above, you can start copying without turning on the copy switch in the copying section. Also, the sheet is fed into the machine while maintaining the correct sheet position, and the toner image is transferred to the specified position on the sheet. It is possible to prevent sheets from jamming.

When the switch 16 detects that the trailing edge of the sheet has finished passing through, the roller 14 is turned off to prepare for the next sheet insertion.

Incidentally, a plurality of these detectors 15 are provided perpendicularly to the sheet feeding direction. This is to detect the skew of the sheet, and the opening 14 will not be turned on until both detect the sheet.

FIG. 3 is a plan view of the operation section of the copying machine shown in FIG. 1, with reference numeral 39 a power (main) switch, 40 a copy start key switch, 41 a stop key switch for interrupting continuous copying, and 42 indicating the number of continuous copies. Numeric keypad for storing the number in memory for setting, 43 is a clear key to clear the number in memory, 101 is a key to advance the paper feeding timing, 102 is a key to delay the same timing, 121,
120 is a lamp that displays the state of paper feeding timing;
0 is a key for returning to the normal timing, 44 is a copy density set lever, 145 is a 7-segment display for the number of memories, 46 is a wait lamp that lights up to display until the fixing roller reaches a fixing temperature, 47 is a cassette and A lamp 48, which is commonly used to indicate that there is no sheet in the cassette, is a lamp that indicates when the container 7 for collecting used toner by the cleaner is full. 49 is a lamp that indicates that the sheet has jammed. The clear key and numeric keypad do not work when there is a jam, but the numeric keypad and clear key can be used during a wait.

The segment display 45 displays the zero-suppressed 1 when the power switch 39 is turned on, regardless of the weight or inside, and displays the number subtracted by 1 from the set number every time one copy is completed, and when the set number is completed, the set number is displayed again. display,
After that, 1 is displayed again after 30 seconds without starting copying. As a result, you can easily start copying one copy without having to set one copy using the numeric keypad, and restart copying smoothly.

The weight indicator 46 blinks when the power switch 39 is turned on, but if the temperature of the fixing roller has not fallen below the fixing temperature, then 1) the previous operator has turned off the power switch 39 not long ago; If the temperature is lower than the fixing temperature (wait), it will blink. It also lights up when the fixing roller has risen to a temperature that allows fixing and the wait time has elapsed. When the power switch is turned off, the blinking and lighting status disappears, and the power off status is displayed. Furthermore, when the Cobby switch is turned on after the weight is up, a blinking operation with a longer blinking interval than during the wait is performed until the shift to the post-rotation mode. In other words, one wait display can display four states: power-on state, copy-incapable wait state, copy-enabled state, and copy cycle in progress, which saves on display space and contributes to reducing device costs. be.

The overflow indicator 48 detects and displays an overflow state of the container 7, and also detects a shortage of toner in the developer container 33 and statically lights up to display the indicator. In the former case, the lamp blinks, and in the latter case, the state ink can be lit. Further, the paper out indicator 47 can blink when there is no paper, and can be turned on statically when there is no cassette.

Furthermore, when a shortage of toner in the hopper 33 or an overflow in the collection container 7 is detected, if the number of consecutive copies set using the numeric keypad is being executed, copying will continue until the set number of copies are completed, and then copying will be resumed. This is to prevent

This prevents a display warning from being immediately interrupted, delaying a series of copying operations, and reducing the actual copying speed. This is because even if there is a shortage of toner or an overflow occurs, the image will not suddenly deteriorate and the device will not be contaminated. If the transfer paper jams, immediately stop the movement of the device to ensure safety. In addition, the stop key and the no paper cassette signal do not immediately interrupt the process, but complete the current process cycle and prevent the start of the next cycle.

The input data using each of the keys described above is not canceled (reset) and is retained during the time when various warning displays appear or when copying is prevented from being interrupted for various reasons. The data is canceled and changed to standard data only when the copying is completely completed or 30 seconds have elapsed without a key entry and the copying is not resumed.

FIG. 4 is an operation time chart of the copying machine shown in FIG. 1, and with reference to this, the scanning operation sequence and operation timing will be explained in detail.

Before turning on the copy switch 40, the platen 1 is
It is located in the center of the main body as shown in the figure.

Turn on the copy switch 40 to delete 'Kame Charger 2'
4. Lamp 3. -Next charger 5. Secondary charger 6, transfer charger 9. The shutter 25 is turned on, and the photoreceptor is exposed to a pre-corona, a -next corona, a nif'n-next corona, a transfer corona, a pre-static discharge exposure, a blank exposure,
Apply uniform exposure and prepare to start copying. Lamp 3 is lit at low light.

When the pulses are counted a predetermined number of times, that is, the drum is rotated a predetermined number of times, the platen 1 starts moving to the left from the state shown in FIG. Start moving to . Then, the 7th section 3 is turned on strongly, the shutter is turned off, the X-rank exposure is stopped, and the exposure is performed. Here, the shift/reverse exposure is to irradiate the image-exposed surface with light when the image is not exposed to prevent potential unevenness from occurring on the photoreceptor.

After the image is exposed for about one and a half rotations, the movement of the platen 1 is stopped and moved to the left. This movement is started by counting the previous pulse by a predetermined number, and the number sent to the memory is set in the copy counter register, and the number is subtracted by 1 from that number.
do. As a result, in the case of copying one sheet, the register becomes O, thereby preventing the subsequent restart of copying. While moving forward to the right, turn on the reed switch 31 shown in FIG.
, 14 are turned on, the reed switch 32 is turned on, and the registration rollers 17 are turned on, thereby feeding the sheet. Even if the reed switch 31.32 is turned on during platen movement other than exposure, the rollers 13, 14, 17 are not turned on.

When the switch 35 in the initial position is turned on, the platen 1 stops moving. Then, the lamp 3 is turned on weakly and wide rotation is continued, during which the photoreceptor is electrically and mechanically cleaned, and after approximately one rotation, the process load is turned off as shown in FIG. 4, and the drum rotation is stopped.

After this stop, the power-on state continues.

In the case of continuous copying, even if the switch 35 is turned on, the platen 1 does not stop and continues to move to the left. When the switch 30 is turned on, the platen starts moving to the right again, and the lamp 3
Turn on the light strongly, turn off the shutter, and restart image exposure.

The timing at which the rightward movement for exposure is stopped and the movement is changed is determined depending on the sheet size of the cassette 10 and the sheet size from the manual feed table 12.

FIG. 5 is a longitudinal sectional view of the cassette section and the manual feed section. 15-
1 is a photointerrupter that constitutes the manual sheet detector 15; 15-2 is an actuating piece that swings when a sheet is inserted; 50
．． 51 is a microswitch that is activated by a cam provided on the cassette when it is inserted into the cassette body.When both 50 and 51 are off, there is no cassette, when each is on, and when they are off, there is no cassette, which is half size, that is A4. In the case of a cassette with B5 size sheets, B4 size sheets are turned off and on respectively.
For cassettes that have a full size or A3. Generates a signal indicating the case of a cassette with Bi size sheets. Three types of signals for these sizes are used to determine the exposure stroke of the platen 1.

For manual paper sheets, 84 sizes are included in the full size, so the sheet detector 15 detects two types, half size and full size.

Therefore, when a large number of copies are to be made by continuously feeding sheets from a cassette, the copying cycle is repeated in strokes corresponding to each size, that is, in the minimum amount of time, so that the time required for copying can be reduced. However, in the case of manual feeding, it is rare to feed continuously, so
Two series of stroke control is sufficient, the control circuit can be simplified, and malfunctions related to size detection can be reduced.

Sheet detector 16 is provided at the same left end position as 15 with respect to the photoreceptor. This detector 16 has the following three functions. The first is to detect the size of the manual feed sheet.
When the detector 16 does not detect a sheet at a predetermined time...-
full size, and when it is detected, it is determined to be full size. Second
The length of the path from the tip of the manual feed sheet to the registration roller is the same as that from the cassette sheet. That is, when the detector 16 detects a sheet fed by the manual feed roller 14, the roller 14 is turned off after a certain period of time, and the sheet is prepared to be fed to the registration rollers and stands by. Then, the roller 14 is turned on again by a signal from the reed switch 31 to start feeding the paper toward the registration roller.

Thirdly, when the trailing edge of the sheet is detected, the roller 14 is stopped to prepare for the next sheet.

The sheet detector 15 detects the sheet and turns on the roller 14, and the detector 16 detects the sheet and turns off the roller 14, that is, preliminary feeding is to prevent the function of the registration rollers from being impaired. This is to keep the pile of sheet loops formed by the stopped registration rollers within an appropriate range. Therefore, there is no possibility of sheet folding or jamming.

This also applies to paper feeding from a cassette; when the copy switch is turned on, the paper feeding roller 13 is turned on for a short time to pull out the sheet from the cassette. reed switch 31
starts feeding the stretched sheet until it reaches the registration rollers.

FIG. 6 shows an example of a circuit for controlling the delay between the paper feed signal and the registration signal. In the figure, key 101. Reference numerals 100 and 102 are keys for advancing the start of paper feeding relative to the normal timing, keys for returning to the normal timing, and keys for delaying the start of paper feeding relative to the normal timing, respectively, as shown in Fig. 6. T1-T3 are key switches 100-10
A timer IC, R, 1, CI and R2°C2 are resistors and capacitors that constitute delay circuits A and B, respectively, and C4 and C5 are used to maintain the state for a predetermined period (approximately 30 seconds) after turning on the circuit. Transistors Ql, C2 and C8 for controlling the operation of this delay circuit are transistors Q4. Q
Ant gate and inverter for controlling the on/off of Q5, 121 and 120 are lamps to indicate advance and delay status of paper feeding timing, C6 and C7 are inverters for waveform shaping, Q10 is an OR gate for selecting the paper feed signal and the registration signal.

Explain the operation. The normal paper feeding timing is when the key 100 is turned on or at least the keys 101 and 102 are turned off, which is when the delay circuit A is activated and the delay circuit B is not activated. In other words, if the key 101 is not turned on, the gate Q1
is closed, and its output O is inverted by inverter Q8, turning on transistor Q4 and operating delay circuit A of R1 and C1. On the other hand, since the goo IQ2 is closed unless the key 102 is turned on, the transistor Q5 is turned off and the delay circuit B of C2 and R2 is not activated. At this time, the paper feed signal and registration signal input by turning on the timing switches 31 and 32 provided in the document table path are input to the CPU with a predetermined delay in delay circuit A, and this paper feed timing is set to the normal timing. do.

If the advance key 101 is turned on now, T1 of the timer IC
is activated to generate an output for about 30 seconds, and the inverter Q9 is turned on, and the lamp 121 that indicates the shortened paper feeding timing is lit, and the inverter Q8 is turned on.
turns off transistor Q4 through R1, CI
Delay circuit A is turned off. As a result, there is no A circuit. (Goo) Since there is no output of C2, transistor Q
5 remains off, and delay circuit B is off. If the copy start key is turned on within this 30 seconds, the reed switch 31 is turned on as described above and the paper feed signal is output.
Also, the reed switch 32 is turned on and the registration signal is sent earlier than the normal timing by the time set by C1 and R1 (the signal input to the CPU is inputted to the CPU in the order of the paper feed signal and the registration signal). The paper feed rollers 13 and 14 and the registration roller 17 are driven at earlier timing than usual.

After 30 seconds, Ql closes, so it automatically returns to normal timing, but if switch 101 is turned on,
If the return switch 100 is turned on even within 30 seconds, the gate Ql is closed, the lamp 121 is turned off, and the normal timing is restored.

If key 102 is still turned on, the Kate Q2
is opened for about 30 seconds, the lamp 120 for displaying the paper feed timing delay is turned on, and the transistor Q5 is turned on, thereby operating the delay circuit B of C2°R2. Note that since the transistor Q4 is in the on state, the timing of paper feeding and registration is delayed by the amount of time set by C2 and R2 compared to the normal state.
, 14.17 will be later than usual.

The timing delay amount is El, C1, skin z.

By making C2 variable, it can be changed arbitrarily, and the holding time of 30 seconds can also be changed according to the set times of the timers T1 to T3. In addition, if you do not use the switches 31 and 32 to operate the timing, but count the 7 pulses that are generated according to the rotation of the drum 2 to operate the timing of paper feeding and registration, you can reduce or increase the number of pulses. By counting in the mouth, the delay and advance can be set and varied. If the amount of timing shift is small, only the timing related to the registration switch 32 may be controlled as described above.

FIG. 7 shows the above operation time chart.

Note that CPB indicates the time when the start key is turned on.

Furthermore, a flipflop is used as the timers T1 to T3, and at the end of a preset number of copy repetitions, the timers are reset 30 seconds after the last stop position HP or BP of the document table. As a result, there is a timing difference of Ω between repeated copies of the preset number.

Can be copied. Also, if you turn on the copy button as soon as possible after the preset number of copies have been completed, you can resume copying with the same deviation. In this case, you can resume copying the same number of copies as before without using the numeric keypad. It is also possible to reset the flip-flop in synchronization with turning off the main motor. After 30 seconds or after the main motor is turned off, the timing difference depends on the normal mode and the preset number also returns to 1.

Key 101 again. If you want to change the timing mode set in 102 before copying starts, turn on key 100 as described above, but if you want to change directly from key 101 to 102 or from 102 to 101, for example, turn on key 100 later. If the entered key is 102, key 1
02 turns on the timer T2. corresponding to the keys 100 and 101. Reset Tl. This can be achieved by resetting the timer corresponding to the key other than the key to which the change is being made. The same applies when T1 to T3 are flip-flops as described above. This changes the standard mode of key 100 to 101. It is also possible to quickly change the timing to 102. Furthermore, the operation of the display lamps 120 and 121 is also switched in accordance with the change.

It is also possible to reset the timers or flip-flops T1 to T3 by also using the clear key 43 in FIG.

The above reset or change operations are prohibited after starting the copy cycle, that is, during the main motor operation period shown in FIG. 4. This can prevent malfunctions caused by careless key operations. If reset and changes are prohibited at least while the document table is moving forward, new timing changes can be made every cycle without waiting for the preset number of cycles to complete. Also, by canceling the prohibition of changing the manuscript table of the last cycle, when backing up,
Allows changes to be made upon completion of preset copy.

The above timing change can be made regardless of whether paper is fed from a cassette or from a manual feed tray. However, the change can only be made to one side, and the other (preferably manual)
may be limited to the standard mode, thereby making it possible to interrupt continuous copying and have an emergency interrupt copy executed in the standard mode.

By the way, in the case of interrupt priority copying, the number preset using the numeric keypad 42 is transferred to and held in memory using a dedicated key (not shown), and a new number can be reset. In this case, if the dedicated key is used to auto-reset to standard timing mode, data entry operations in interrupt priority copying become easier. Furthermore, if the system is configured to automatically return to the original timing mode after the parent's copy is restarted after the priority copy ends, the data entry operation for restart becomes easy.

The above-controlled feed signal and registration signal are input to one input port of a CPU consisting of a microcomputer. The computer CPU recognizes the first signal input after the document table starts moving forward as a feed signal, and in response to that signal, feed rollers 13 and 14 are activated.
The second signal is recognized as a registration signal, and the registration roller 17 is activated in response thereto. Therefore, the sheet can be sent to the copying section with a desired feeding deviation, and the toner image of the solid body can be transferred to the desired position.

FIG. 8 shows another example of a timing change control and display circuit according to the present invention, in which the CPU is a microcomputer that executes sequence control of the copying machine, and its operation is as described above. Further, each of the timing control keys 100.
101. 102 and the registration signal are input connected to the input port of the CPU.

In addition, TIO is an oscillator that oscillates at about IHz, and Ql is a display device for displaying an A/D converter that converts the analog voltage set by VR, 1 into 3 digital bits. It is composed of 5 LEDs.

9-1 to 9-3 are control flowcharts according to programs stored in the program memories R and OM of the CPU shown in FIG. FIG. 9-1 shows the key switch 100. 101. This routine stores the paper feeding timing instructed at 102 in the register in the CPU shown in FIG. 10 and displays it at 120.

Furthermore, FIG. 9-2 is a flowchart for changing the paper feed registration timing during a copying operation according to the data in the register.

FIG. 9-3 is a 70-chart of the copy sequence.

FIG. 11 is a time chart showing the timing operation of the registration roller in the eighth factor.

10-1 to 10-3 are diagrams of shift registers for timing change control.

The timing data setting and display operation will be explained according to FIGS. 8, 9, and 10.

The normal paper feeding timing is when the key 100 is turned on, in which case the step shown in FIG. 9-1.

At step 200, it is determined whether the key 100 has been input and step 2 old is executed. At 201 in the flowchart in Figure 9-1, data 5 in the standard mode is stored in the timing setting register CNT shown in Figure 10-1 as "0" and "1" in the figure above. The data is the data in the standard mode. be. Next step 220
The central 10 pits of the display data register are output set to the output ports 81 to 810 of the CPU connected to the LEDs, and the LEDs I to LBDIO are turned on. That is, in the case of the standard mode, 5 is stored in the CNT register, the data shown in FIG. 10-1 is stored in the display data register, and all 12O8 of the display are lit.

If the key 101 is pressed, the registration timing is desired to be advanced, and in this case, a key input is determined in step 202, and a clock input determination step 211 is executed. It waits until a low frequency clock pulse of about IHz is input from the clock generator TIO. When one clock pulse is input, the timing register CNT is determined, and if it is not O, the above CNT is input in step 213.
Subtract 1 from the NT register. If the key 101 is further pressed, one is subtracted each time a clock pulse from T10 is input. And the CNT register is O
When , the step 213 is jumped by the Stesob 212 and the subtraction is stopped.

Or indicate Makinmu's progress point.

By the way, in step 213, when the CNT register is subtracted by 1, the display data registers R and GT are shifted to the right one bit at a time. That is, while the key 101 is pressed, the six-point data register RGT is shifted one pit to the right each time a clock pulse from T10 is input. For example, if the first key 101 is pressed as shown in Figure @1o-1, the display data register FtGT is shifted twice and the register CNT is subtracted twice as shown in Figure 10-2. and becomes 3. Then, in step 220, the central 10 bits of the display data register RGT are output to the display device 120 to the ports S1 to SIO. Therefore, LED
I, 2 are turned off, and LEDs 3 to 10 are turned on.

The next time the key 102 is pressed, the registration timing is delayed, and each register operates in the opposite way to when the key 101 is pressed. That is, according to the number of clocks input while key 102 is pressed, register CN
T is added and the display data register is shifted left. For example, in the target mode, if the key 102 is pressed for a time corresponding to three clock pulses, the register CN
T is added three times and becomes 8, which is the display data register RGT.
The display becomes as shown in Figure 10-3.Next, after turning on the copy operation main switch for the above three modes and before copy start (during standby), repeat the above-mentioned registration timing set subroutine (SBDATASET). , setting and displaying each data register is repeated, and keys 100. 101. When copying is started by turning on the copy key 4o to read the input at 102, the document table starts (302) and enters a registration subroutine for detecting a registration signal.

As described above, this subroutine controls the register according to the contents of each sent data register RGT (303).

Next, the document table is reversed, and in the case of continuous copying, this series of operations is repeated (304). Once the copy is complete, it returns to standby again.

FIG. 9-3 shows the contents of the registration subroutine, which will be explained in detail.

In the 5BREGiST routine shown in FIG. 9-%, when it is determined in step 234 that the registration signal 32 shown in FIG. When in standard mode, timer S starts counting (
240). Resist solenoid S due to timer up
An L ON signal is outputted from the output heat to turn on the registration roller 17 shown in FIG.

On the other hand, if it is determined in step 237 that the mode is not the standard mode, the unit time data d is set in a separate area of the memo I71%AM (233). This data d is set by a variable resistor vR, converted into 3 bits by an A-D converter Q1, and inputted to the CPU, and this data corresponds to a unit shift time for determining the amount of advance and off-center delay in the registration timing. do. This time span can be arbitrarily selected by VR, so the same shift key 101. Even if 102 is turned on, or even if it is turned on for the same amount of time, the shift amount differs depending on the VR.

Next, in step 238, it is determined whether the contents of the register CNT are 5 or more, that is, whether it is a delayed shift or an advanced shift, and accordingly, in step 235 or in step 235, a correction is made by subtracting d from S. These steps are performed a number of times according to the number of contents of the register CNA (D) to set the timing shift time.

For example, in delay mode, if the CNT register is 8
When , the process branches to step 235, where the unit timer d is added to the standard timer S, and at the same time, the CN'll'' register is subtracted by 1. If the subtracted value is not equal to 5, the unit timer d is added again. Repeat the above operation. When repeated three times, CNT becomes 5. As a result, the time Sd is added to the standard timer S. In step 240, this timer S+3d starts counting, and at the same time as the time is up, the registration roller 17 is turned on (232).

The timer for ed waiting time is reset from Imma S.

This modified tie-2 (S-Sd) is counted (240
) Turn on the registration solenoid SL and operate the registration roller.

In this way, in the case of the standard mode, as shown in FIG. 11, the registration roller 17
is turned on, and the image and the leading edge of the transfer paper are brought into substantially alignment.

If, for example, the contents of the register as shown in Fig. 10-2 are obtained by operating the old key 1, the register CNT is 3,
As shown in FIG. 11, the registration roller 17 is turned on a unit timer (E) earlier than in the standard mode.

That is, by leading the blind resist by an amount corresponding to the Φ unit timer in the standard mode, the transfer paper can advance by that amount from the leading edge of the image area, and a non-image area can be created at the leading edge. At this time, the display 120 is displayed as shown in FIG. 10-2, and the LED 2 is turned off to indicate that there is a blank space at the tip.

Further, when the register contents are set to, for example, 10-3ρ by operating the key 102, the registration will be delayed by a 3-unit timer indicated by D compared to the standard mode. This delay is shown in Figure 18 (■). One unit of the timer can be set to Vr (1. Therefore, the amount of timing delay per unit can be adjusted arbitrarily.

In this embodiment, registration control has been described, but it is obvious that the paper feeding timing from the switch 31 can be similarly performed. Furthermore, similar to the embodiment shown in FIG. 6, it is also possible to easily return to the standard mode after a certain period of time (305 ec) has elapsed.

By the way, it is also possible to form an image at a desired position on the sheet by selecting the timing of starting the scanning movement of the document using the above-mentioned keys. In this case, the switches 31 and 32 in FIG. 2 may be left as they are, and the scan start switch 30 may be subjected to the correction control described above. Therefore, even if the document table moves left from the stop *ta normal position switch 35 and hits the #-ta switch 30, it will start moving to the right after a time corresponding to the key pit. Therefore, the transfer position is the same.

Furthermore, in this embodiment, the amount of position correction of the transferred image is set using the manual key on the operation panel, but the automatic collating device for the transfer material
(sorter, collator) or by generating the aforementioned advance signal by sorter operation start.

Furthermore, if the timing including the paper feed registration roller is controlled, the maximum correction amount can theoretically be extended to the size of the transfer material, so the margin can be used effectively, for example, for memo paper. For example, the right and left sides of an A3 book item can be
4 When copying onto two sheets of transfer paper, first copy one side in standard mode, then copy the other side using A4 paper.
By delaying the copying by the size, it is possible to copy without moving the original.

Furthermore, the control method and display method used in this example control and display the absolute amount of deviation from the standard position of the leading or trailing edge of the transferred image, but the size of the transfer material is
It will be input to PU.

As described above, the present invention can be used, for example, when correcting and reproducing a misplaced original at a desired location on the transfer material without repositioning the original, or when writing in the center of the transfer material for later filing. This enables simple operations such as when shifting and transferring original contents onto a sheet to provide a margin for a file, or when correcting the position when copying a book.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the image forming apparatus according to the present invention, FIG. 2 is a sectional view of the original table part in FIG. 1, FIG. 3 is a partial plan view of FIG. 1, and FIG. Operation time chart for the device, inches, 32 is a resist switch,
120 is an LED.

Claims (1)

[Claims] (1) means for forming an image on a recording medium; means for inputting data for shifting the position of a reproduced image recorded on the recording medium from a reference position; and means for holding data from the input means; means for controlling the timing of the image forming means according to data held in the holding means to shift the position of the reproduced image from the reference position; and processing the recording medium ejected after the image is formed by the image forming means. an image forming apparatus, comprising: a recording medium processing means, wherein when use of the processing means is selected, the shifting means is caused to shift by a predetermined amount.