JPS6154693B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a sheet feeding device. Conventionally, it is known to select one of a plurality of sheet storage sections and feed the sheets from there to form an image. Furthermore, in this case, the present applicant has proposed a system that automatically feeds sheets of the same size from the other storage section when the sheets in one sheet storage section become empty (Japanese Patent Application Laid-Open No. 1983-1999).
No. 10142 = Special Publication No. 59-5489). However, even if the seat storage compartments are the same size, the types of seats in the storage compartments may be different.
Therefore, switching the feeding based only on size conditions may result in forming an image on a sheet different from the original. In order to prevent this, it is conceivable to issue a desired selection instruction for automatic switching. However, there is a risk that a feeding switching signal will be output during the feeding operation of the last sheet, resulting in a malfunction. The present invention also eliminates this inconvenience, and provides first seat storage sections 2 each capable of storing a plurality of sheets.
1 and the second sheet storage section 22, a command means (UPPER-CASSETTE key, LOWER-) for inputting a command signal for selecting and feeding one of the storage sections
CASSETTE key), storage section detection means 23 that outputs a signal indicating the presence or absence of sheets in each storage section.
a, 23b, size detection means (MS13, 19, 21, MS12, 20,
22), means for outputting a selection signal for the storage section based on a command signal from the command means and a sheet presence signal from the storage section detection means in the first storage section when there is a sheet in the first storage section (fifth); 1
(Fig. 6-2), an input means (AUTO key) to arbitrarily select automatic switching of storage sections, and when the first storage section runs out of sheets, the storage section detection means in the first storage section detects no sheets. The second storage section is selected based on the conditions of the signal (STOP), the storage section switching selection signal (AUTO) by the selection input means, and the size match determination in the first and second storage sections by the size detection means (step 88). control means (Fig. 5-2) for outputting a selection signal for the sheet storage section, and the control means determines whether or not there is the automatic storage section selection signal (step 87). This feeding control device is characterized in that it is executed between the first sheet feeding timing (steps 24-26) and the next second sheet feeding timing (steps 107-26). DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to an example in which a one-chip microcomputer (hereinafter referred to as CPU) is used to control various functions of a copying machine. The operation of a copying machine which is an embodiment of the present invention will be explained with reference to FIG. A document is placed on a document table that constitutes a document placement surface, and is pressed down by a document pressure plate 10.
It is composed of a moving reflecting mirror 6, a lens 17, and fixed reflecting mirrors 18 and 19. Therefore, the original is moved by the movable reflecting mirror 8 which moves in the direction shown by the arrow A in the figure together with the illumination lamp 9, and by the movable reflecting mirror which moves in the same direction at a moving speed of 1/2 of the movable reflecting mirror 8. 6, while the optical path length is kept equal, the light is exposed to a slit through a lens 17 and fixed reflection mirrors 18, 19, and is imaged onto a drum 30 having a photoreceptor on its surface. That is, the document is exposed to slit light while being scanned by an optical system (illumination section). The surface of the drum 30 has a photoreceptor whose photoreceptor layer is covered with a transparent insulating layer. Becomes electrically charged. Subsequently, when reaching the exposure section 16, the original on the original platen glass is illuminated by the illumination lamp 9, and an image is formed on the drum 30 by a moving reflection mirror, a lens, and a fixed reflection mirror, so that the photoreceptor is exposed to the original image. At the same time, AC static electricity is removed by the AC discharger 13 to which AC high voltage current is supplied from the high voltage power supply. Next, an electrostatic latent image is formed on the surface of the drum (photoreceptor) by full exposure by the full surface exposure lamp 33 and enters the developing device 31 . Development is performed by powder development using a sleeve method, and the electrostatic latent image is visualized. Next, the transfer material is fed from the cassette 21 or 22 by the paper feed roller 24 and transferred to the first roller 25 and the second roller.
It is conveyed by the roller 28 and the timing roller 29
The roller 2 is temporarily stopped by the registration signal.
9 is rotated and the paper is conveyed again. The resist signal is a switch RG that detects a specific passing position in the optical system.
obtained from. The switch OHP generates a signal indicating the optical system home position (stop position). The transferred transfer material comes into close contact with the drum,
The image on the drum is transferred to the copying material by a positive high voltage current from a high voltage power source in a transfer charging 27. After the copying material has been transferred, it is separated from the drum by a separation roller 26, guided to a heat fixing roller 4, and after being fixed, excess charge is removed by a static eliminator 3, and the material is ejected onto a tray 20 by an ejection roller. Ru.
Copying is now complete, and the remaining toner on the drum is cleaned by the blade 11 pressed against the drum surface (photoreceptor), allowing the next cycle to be repeated. To avoid complexity, a detailed explanation of the drive system and the sequence and timing of each process will be provided later. A cam installed on the drum operates switch PF to generate a feed signal. The switch DHP generates a drum home position signal and stops the drum at the position where the photoreceptor joint contacts the cleaner 11. Reference numerals 23a and 23b denote a lamp for detecting the presence or absence of paper in the cassette, and a light receiving element that receives the light. Reference numeral 2 denotes a paper detection lamp and a light receiving element for detecting paper delay and retention therein. Reference numeral 16 is a blank exposure lamp which exposes the photoreceptor to light to eliminate surface potential unevenness when imagewise exposure is not performed. 7 is a fixing motor, 15 is an optical motor, and 14 is a pre-exposure lamp that fatigues the photoreceptor in advance to make it uniform before the process. Also 36
is a pulse generator consisting of a plate that rotates in conjunction with the drum and an optical detector that detects the holes in the plate. The operation panel of this device is shown in Figure 2. The operator can interact with the CPU via this control section. That is, key groups 21, 22, 23
The CPU indicates a response to the input on the displays 24 to 28. The operator enters the desired number of copies on the display 25 by pressing the numeric keys 0 to 9, up to 99.
You can set up to The "CLEAR" key is used to clear the set contents of the display 25 to zero.
The “MULTI” key is used when you want to copy only the desired value shown on this display 25. Once this key is pressed, the machine enters the copying operation and when the optical system reaches the inversion position, the display 26 The value of is increased from 0 to +1. When the set value on the display 25 matches the value on the display 26 indicating the number of sheets copied, the copy operation mode is entered, and when the copy operation is finished and the photosensitive drum has stopped, the display 26 indicates the number of sheets copied.
Return 6 to “0”. Therefore, the value initially set using the numeric keypad still remains on the display 25, so if you want to make the same number of copies for another document, you can press the "MULTi" key again. however,
This “MULTi” key has a value of “0” on the display 25.
, or when any of the indicators 24 is lit, it is ignored. “MULTi” copy count is set during copy operation
When the "STOP" key is pressed or any of the display groups 24 lights up before the count number is reached, the copy operation at that point is terminated.
Finish the copy cycle. So for example, set
If the above state occurs when the copy count is “3” for the count “6”, the display 25 will be “6”,
The display 26 is at "3" and is stationary. At this time, all keys in the key group 22 are accepted. Further, after the copy operation is completed, all of the key groups 21 and 22 are accepted. The "SINGLE" key performs a single copy operation regardless of the SET count and copy count numbers. Therefore,
Using this key, interrupt copying is possible only for single-sheet copying. For example, the first operator sets 6 sheets on the display 25 and copies the copy count
When the number of copies reaches 3, the second operator requests to interrupt the copying of one copy, the first operator presses the “STOP” key to end the copying as soon as the third copy is completed, and the first Operator 2 sets his own original and presses the "SiNGLE" key, then the display 25 shows "6" and the display 26
remains stationary at "3", and one page copying for the second operator is completed. Therefore, by pressing the “MULTi” key again, the first operator
You can make copies of the remaining three. If the desired number of copies is not one but a plurality of copies, this can be done using the "INTERUPT" and "RECALL" keys. As mentioned above, when the first operator stops the second operator's interrupt with set count "6" and copy count "3", when the second operator wants to interrupt 2 copies, the second operator The operator presses the “INTERUPT” key, temporarily saves the set count number “6” and the copy count number “3” to another memory, and
After lighting the interupt lamp 28, enter “2” as the set count number using the ten key,
Press the “MULTi” key to complete the two-copy process. After this, press the “RECALL” key and the numbers for the first operator, “6” and “3” will appear on the display 2.
5, 26, the first operator can press the "MULTi" key again to make the remaining three copies. The display lamp 27 "ORIGINAL" indicates that the original can be set or replaced, and goes out during copying. Therefore, since the light turns on when optical scanning of the last paper copy is completed, copying can be started again by immediately replacing the original and pressing the "MULTI" or "SINGLE" key. The indicator lamp 28 “INTERUPT” lights up when you press the “INTERUPT” key.
It disappears when you press the “RECALL” key. "JAM" lights up immediately when a copy paper jam occurs, and puts the copy in end mode. At this time, the display unit 26 causes the CPU to increment -1 or -2 depending on the location where the paper jam occurred and the paper size, thereby ending the copying. Also, when a jam occurs, the operator opens the door of the machine and removes the jammed paper, so the total counter that calculates the copying fee only counts after the paper tray is stored, and jammed paper is not counted. . In other words, both the copy count display and the total counter are guaranteed to count in the event of a jam. The "TONER SUPPLY" display lights up when the toner in the developer unit runs out, and does not affect the start or continuation of copying. "PAPER SUPPLY" lights up when there is no paper in the selected cassette, and prohibits the start of copying or terminates continued copying. “WAIT”
is turned on for a period of time until the temperature of the fixing device reaches a desired value, and prohibits the start of copying, but once that temperature is reached, the start of copying is enabled and the enabled state is maintained. Switch button “UPPER-CaSSETTE”,
"LOWER-CASSETTE" selects the upper or lower cassette, and the lamp group 25 displays the paper size stored in the selected cassette. If you press the push button switch “AUTO”,
Only when there is no paper left in the selected cassette, or when there is paper of the same size in another cassette.
You can automatically pull out the paper from that cassette and continue copying. (Control Circuit) Figure 6-1 shows the control circuit for inputting and outputting to the computer, and Figure 6-2 shows the peripheral circuit for inputting and outputting. In the figure, the CPU is a memory that stores the control program shown in Figure 5 (described later), a memory for saving the operation timing numerical data necessary for program execution, a count value save for copying interrupts, input data, and a logic for decoding the above program. It is a computer chip device whose circuit is included in one semiconductor substrate. The details are shown in FIG. Output a~b
is connected to the display device via a segment decoder 608 in order to display the number of sheets on the display devices 25 and 26.
The output CT is used for column scanning of the input matrix circuit and digit scanning of the displays 25 and 26. The gate circuit G has a so-called decoder function, which is used to combine signals from the chip outputs to obtain more output signals. With this gate circuit
The output of the CPU is given to the input matrix circuit and output interface circuit. 603 and 604 are AND gates, 601, 602, and 606 are inverters, 605 is a NAND gate, 607 is an OR gate, and 609 is a paper detection circuit using a transistor. Each digit of the display is displayed using 7 segments, and the digit is selected by the output CT signal from the chip.
This is a dynamic display in which the required digit segment is selected by the 10,000 outputs that are output alternately in the order of each numerical CT and the 4-bit outputs that are output simultaneously from a to d, and the display units are alternately displayed in order. . Inputs from the input switches crossing the outputs CT _1-1 , CT _1-2 , CT _2-1 , and CT _2-2 are similarly dynamically input. The present invention has the feature that the information described below can be displayed even during the execution of a process, and input can be made even before the process is completed. The scanning output signal for inputting key entries etc. is output sequentially by the clock for computer program processing, while the output for operating the control load is an output of the length required for the load to be turned off. There is also a driver circuit (not shown) which serves as an interface circuit and powers up a signal from a gate circuit to drive a solenoid, lamp, etc. An AC load or the like is driven by ANDing with the output from the oscillator and outputting it as a trigger signal for a triack or the like. In the matrix circuit section, a matrix is constructed in such a way that the scanning line and the input line of the microprocessor intersect, and the point at which this intersection becomes a switch corresponds to the input command section. If there are x scanning lines and y input lines to the processor, a maximum of x·y switches is possible. In the ROM included in the computer chip element, the master program for executing the sequence of the copying machine is ordered in advance and is embedded in each address, and its contents can be retrieved each time a specific address is set. A read-only memory that stores programs (key entry programs, equipment operation programs, machine termination programs, etc.) in binary code in order from address 0 to the required final address, which is preset in a well-known matrix circuit with a code. . RAM is a read/write memory that stores the number of copies and temporary control signals during process control, and is a well-known memory that stores one set of binary codes. It is possible to write or read data into or from a plurality of flip-flops within the memory. [About control timing and control load] Figure 3 is for half sizes such as A4, B5, U2, etc. Figure 4 is for full sizes such as A3, B4, U1, etc. Shows control timing chart and control load. U ₁ and U ₂ are universal cassettes, and U ₁ stores paper of any size corresponding to the full size of U ₂ . The SW is a switch that turns on the power to the device and lights up the power-on indicator lamp at the same time. M1 is the motor to rotate the fixing roller, L ₁ is the wait lamp ₁ that indicates copying is possible, H ₁ is the fixing heater built into the fixing roller, cooling blower M ₂ is the motor that cools the above heater, and the main motor. is the one that rotates the photosensitive drum, and the paper feed roller PIL is the paper feed roller 24 that rotates constantly.
The first register PL is a plunger for driving the first roller 25, the second register PL is a plunger for driving the timing roller 29, and the developing device PL is a plunger for driving the screw that stirs the developer powder. , ATR detection is an optical detector and hopper to detect a decrease in toner density.
HOP is a toner replenisher operated by the detector, pre-exposure tape _L2 is a lamp that uniformly irradiates the photoreceptor in advance, optical motor _M4 -F is a forward motor that moves the optical system for exposing the document, and optical Motor _M4 -B is a motor for reciprocating the optical system, exposure lamp _L3 is a lamp that illuminates the photoreceptor with the original image, and Planck exposure lamp _L4 is used to illuminate the photoreceptor when the original is not exposed. _L5 is a lamp for uniform exposure, L5 is a lamp for uniformly exposing the photoreceptor during the entire surface exposure process, primary transformer _Tr1 is a primary charging transformer, and bias transformer _Tr2 is a transfer charging transformer. Details of these operation timings will be described later. These control loads include operation control signals for the main motor, cooling motor, AC charger transformer Tr ₃ for static elimination, operation control signals for the paper feed roller plunger PL in the upper stage of the cassette, and optical system advance motor M ₄ .
-F, exposure lamp _L3 , developer plunger PL control signal, optical system reverse motor _M4 -B control signal, front exposure lamp _L2 control signal, jam indicator lamp, reset plunger control signal, AC
Control signal for transformer voltage switching, primary transformer
Control signals for Tr ₁ , bias transformer Tr ₂ , and blank exposure lamp L ₄ are output directly from the CPU. Further, the control signal for the first register plunger, the control signal for the second register plunger, and the control signal for the entire surface exposure lamp are formed by logically combining the above-mentioned signals. That is, C=A・,D=
( RG・E )・A, H=E+L. Other output signals from the CPU include the upper cassette instruction signal.
There are UL and total counter control signals TC.
(RG is a signal indicating the second registration position generated by a micro switch installed in the optical system running path) On the other hand, the signal input to the 1-chip microphone computer is the home position signal of the photosensitive drum.
DHP (generated by drum cam and micro switch) optical home position signal
OHP (generated by the micro switch at the end of the optical system scanning path), paper feed signal PF (drum
There is a pulse signal CP by a generator 36 (generated by a cam and micro-switch) and operatively coupled to the drum rotation made to generate one pulse per rotation of the drum. The generator could be an oscillator that generates a series of clock signals synchronously with the drum. Time-sharing display selection signals CT _1-1 , CT _1-2 , CT _2-1 , CT _2-2 for operating the display 25 (number of sets) and display 26 (number of counts) in FIG. is output. A corresponding 4-bit binary number is output from output terminals a, b, c, and d to operate the seven segments of the selected display. Also, numerical values,
Signals from key groups 21, 22, 23 for various commands,
Coincidence signal output when the upper and lower cassette sizes match, and indicates whether the selected cassette size is FULLSIZE or HALF
The SIZE signal is the time-sharing display selection signal mentioned above.
CT _1-1 , CT _1-2 , CT _2-1 , CT ₂ - ₂ , and 4 bits are time-divisionally input in parallel from PI1 to PI4 to the CPU. Furthermore, this message is output when no cassette is inserted for the upper or lower selection, when there is no paper in the selected cassette, or when the "STOP" key on the operation panel is pressed during copying. STOP
The signal and the copied paper are sent to detector 2 (first
The CPOS signal that is output when ejection is detected (when the copy tray is reached) is input to a 1-chip microcomputer. [Description of a 1-chip microcomputer and its peripheral circuits] Figure 7 shows a 1-chip microcomputer PPS4/- manufactured by Rockwell Corporation used in the present invention.
Please refer to the PPS4/1 manual for details regarding the circuit diagram of 1. FIG. 6 shows a circuit diagram of the present invention. In FIG. 6, the relationship between the signal names of the one-chip microcomputer PPS4/1 and the control signals of the present invention is shown. DI/oO is CT1-1, DI/o1 is CT1-2, DI/
o2 is CT2-1, DI/o3 is CT2-2, DI/o4 is B, DI/o5 is E, DI/o6 is F, DI/o7 is G,
DI/o8 is I, DI/o9 is TC, SERIALOUT is
UL, RI/o5 is A, RI/o6 is J, RI/o7 is K,
RI/o8 is L, RI/o is a, RI/o is b, RI/o
is c, RI/o is d, INTO is CPoS, INTI is
STOP, PI1 is key “0”, “4”, “8”,
“MULTI” and “cassette up/down selector switch” are connected in common, PI2 is key “1”,
One end of the switches “5”, “9”, “SINGLE”, “AUTO” are connected in common, PI3 has keys “2”, “6”, “INTERUPT”, “CLEAR”,
One end of each collector of the “COINCIDENCE” transistor is connected in common, and PI4 is the transistor of the keys “3”, “7”, “RECALL”, “JAM RESET SWITCH”, “JACK KILL SWITCH”, and “SIZE”. One end of each collector connected, PI5
connects to PF, PI6 to OHP, PI7 to DHP, PI8 to CP, etc. The “ORIGINAL” LAMP of the operation section in Figure 2 is
Input J to INVERTER1, create an OR signal,
It will be lit. C is INVERTER602, AND
Input B and A to GATE603 and make a logical combination of C=A-. D is AND GATE604, NAND
Input the resist signal, E and A to GATE605 and INVERTER606, and create by logical combination D=(RG・E)・A. H is created by inputting L and E to OR GATE 607 and logically combining H=L+E. The four display devices used in the displays 5 and 6 are divided into seven segments, each segment has four wires connected in common, and the seven signals connected in pairs are sent to the decoder and driver 8. , decodes and outputs 4-bit signals a, b, c, and d of a 1-chip microcomputer. On the other hand, the selection of these four display devices is CT _1-1 , CT _1-2 , CT _2-1 ,
CT _2-2 is repeatedly set and reset in the order of time division, and the lights are turned on. PI1~4 and _CT1-1 ~
The 16 input signals connected to the contacts of the matrix of CT _2-2 are input in a time-sharing manner. key “0”,
“1”, “2”, “3” are when only CT _1-1 is set, and keys “4”, “5”, “6”, “7” are
When only CT _1-2 is set, key “8”,
“9”, “INTERUPT” and “RECALL” are set when only CT _2-1 is set.
“SINGLE”, “CLEAR”, the “jam reset switch” which turns on when a jam occurs, and the “cassette up/down changeover switch”, “AUTO”, “COINCIDENCE”, when only CT _2-2 is set,
"SIZE" is read when only the ON signal of the exposure lamp etc. is set. A diode 19 is provided to prevent backflow. The peripheral circuits are shown in Figures 6-2 to 6-4. MS13, 19, and 21 are for determining the cassette size of the upper cassette, and MS15 is for checking its insertion. They output 0,1 signals, respectively 1,
They are given weights of 2, 4, and 8. MS12, 20,
22 is for determining the size of the lower cassette, and MS16 is for checking its insertion. They are 1, 2, 4, 8
It is given the weight of and these are
The input is input to the MULTIPLEXER609, and switching between the upper stage and the lower stage is performed externally by the switching signal UL from the 1-chip microcomputer.
Outputs codes 4 and 8. and decoder 11
decodes these 1, 2, 4, and 8. For A3, only MS15 is turned on, and the decoded result is 0.
The A3 lamp is turned on via the driver 612. Similarly, A4 is 1, U1 is 2, U2 is 3, B4
4 for B5, 5 for B5, and 8 if no cassette is inserted.
become. Also, if the cassette is not inserted deep enough, MS15 or 16 will not turn on, so the weight 8 will always be 1, so the decoded result will be a value between 9 and 15, and neither lamp will light up. . (Refer to Figure 6-5) “SIZE” signal is
OR GATE weights 0, 2, 4 of decoder611
This signal, which is input to 613 and outputs "1" when one of them is selected, that is, when it is full size, is an input signal that changes the sequence timing depending on the size. Also, the two sets of MS13, 19, 21 and MS12, 20, 22 are
Input to MAGNITDE COMPARATOR610,
“COINCIDENCE” when both weights match
The signal is set to 1 and it is determined whether the sizes of the upper and lower cassettes match. When the upper cassette is commanded (the upper/lower switch is turned on), the cassette selection signal UL output from the 1-chip microcomputer becomes 0. Therefore, transistor 621 is turned off, the upper cassette paper detection circuit is selected, and transistor 621 is turned off.
22 is turned ON via INVERTER 23, so the lower cassette paper detection circuit is not selected. However, in the selected upper cassette paper detection circuit, when the paper runs out, the resistance of CdS615 decreases and the NEGATIVE input terminal 6 of operational amplifier 13 becomes lower than terminal 5, so the output of OPAMP613 becomes "1".
It becomes a STOP signal. Similarly, when UL=1, the lower cassette paper detection circuit is selected and functions in the same way. Further, when the "STOP" key on the operation unit is pressed while the main motor is driving, FLIP-FLOP 617 is set since A=1, and KSTOP=1.
Therefore, when the main motor is not driving, A=0.
Therefore, it is not set, and FLIP-FLOP 617, which is set while the main motor is running, becomes A=0 and is reset when the main motor stops. This FLIP―
The output KSTOP of the FLOP 617, the upper cassette paper detection signal, the lower cassette storage detection signal, and the no cassette signal are input to an OR gate 618, and when any of these signals is "1", it outputs "1" as "STOP". [Explanation of the flowchart of the sequence program stored in the ROM] When controlling the sequence with a 1-chip microcomputer, each bit in the RAM is set and reset in order to temporarily store various operating modes. However, these are called Flags, and there are about 20 types. Flag 1: Set when the SINGLE key is pressed,
Reset when MULTI key is pressed. Flag 2: As a result of determining the paper size, FULL
Set when SIZE, reset when HALF SIZE. Flag 3: Set when SET COUNT and COPY COUNT match. Flag 4: Set when a delay jam occurs. Flag 5: Set at the rising edge of the second paper feed signal when entering the second copy cycle from the first copy cycle during MULTI-COPY. Flag 6: Set at the start of the optical system for the second cycle during MULTI-COPY. Flag 7: MULTI or
Set when the SINGLE key is pressed. Flag 8: Set when a retention jam occurs. (When the paper is stopped on the detector, etc.) Flag 9: Set when the drum is not at HP (stop position) when the power is turned on, and reset when it reaches HP and enters the post-rotation cycle. It is also set when the "SINGLE" key is pressed during the post-rotation cycle, and reset when the "MULTI" key is pressed. Flag 10: Set when the number of input pulses does not reach the set value, and reset when it does. Flag 11: When starting the rear rotation in the HALF SIZE copy cycle, the optical system is rotated from the inverted position.
Set when the optical system reaches HP while the drum rotates 150°, and proceed from the above.
Reset when it reaches the 150° position. Flag 13: Set when CT _1-1 is set, reset when CT 1-1 is reset. Flag 14: Set when CT _1-2 is set, reset when CT 1-2 is reset. Flag 15: Set when CT _2-1 is set, reset when CT 2-1 is reset. Flag 16: Set when CT _2-2 is set, reset when CT 2-2 is reset. Flag 17: Reset when it is in the upper row, set when it is in the lower row. For example, if you specify "upper cassette" with "AUTO" and you run out of paper, if the lower cassette is the same size and there is paper, then
Set Flag17 and feed the paper from the bottom. Flag 18: Set when the “INTERRUPT” key is pressed and reset when the “RECALL” key is pressed. Flag 19: Set when the “Jam Kill Switch” is pressed. This allows the jam program to be ignored even if no paper is sent during COPY. The operation mode is determined by determining whether each of the above flags is set or not, and program execution, sequence operation, jam processing, etc. are proceeded. This is done by changing a part of the program by shorting or opening the part related to the terminal for inputting signals to the computer, thereby eliminating unnecessary processing operations during the test. . A 1-chip micro-chip that satisfies the timing charts in Figures 3 and 4 and the specifications of the operating section.
Figure 5-1 shows the system flowchart of the sequence program stored in the computer's ROM.
It is shown in Figure 5-7. This system flowchart will be explained according to each step. In steps 1, 2, and 3, set or reset the UL according to the instructions of the upper and lower selection buttons in order to select the transfer paper size lamp on the operation unit and detect the presence or absence of cassette paper. SUBP 4 is a display digit signal switching subroutine whose details are described in steps 261 to 284.
This SUBP is always passed through the flow while counting pulses CP for sequence control or when the program has a change in another input signal. As a result, the display can be dynamically switched and used at approximately 1/4 duty (usage rate), and therefore the display can appear to display continuously without flickering. If the optical system is not at the home position HP when the power is turned on, repeat steps 4-5-6 to move the optical system backwards.
When OHP is reached, press 7 to stop reversing. Next, if the drum is not at the home position, repeat 8-9-10 to search for DHP, and if DHP is detected, 11-12-
Perform steps 52-53 to 62. This allows image exposure and image formation to always be performed from a precise position, increasing the reliability of image quality. This is provided to prevent chattering of the detection signal caused by the micro switch which rotates one more time after detecting the DHP at 55-56 and detects the next DHP at 58-59. The relationship between this timing and the flowchart is explained in Section 8.
It is shown in the figure. When the optical system or drum is not in HP, the display only shows "00" and "00". When the optical system reaches HP and the drum rotates more than once, HP
It is not until this point is reached that input using the numeric keypad (Fig. 2) becomes possible. If both OHP and DHP are detected when the power is turned on, the process passes through 4-5-7-8-9-11 and immediately enters the key reading routine of 13-14-15-16. Figure 3 shows the timing chart for two half-size copies, so now use the numeric keypad to enter 2 in display 25 (number of copies set) in Figure 2, and press the "MULTi" key. The flow when you press this button will be explained. It passes through Tenquirtine 13-14-15-18 and enters the sequence routine 19 and below. 19 indicates the point ○A in FIG. 20 and 21 indicate the section marked with ○A in Figure 3,
Indicates that input clock pulses are counted up to 60. Also, in this section, the digit signals of the display are switched sequentially through SUBP, which apparently indicates that the display is lit in parallel with the sequence control. 22 indicates that J (transformer switching) is turned on when CP is counted 60 times. Thereby
Increase AC corona discharge voltage. Reference numerals 23 and 24 refer to the section ○D in FIG. 3, which is a routine in which PF is input as the paper feed signal. The PF determination at 24 and the sheet feeding output at 26 are the first sheet feeding timing. When reaching the point ○O in Figure 3-2, before this
When the STOP mode is entered, the timing diagram shown in Figure 3-2 will appear. Therefore, in FIG. 5-1, step 25 determines this and 51 of J and K off.
Jump to the following. Furthermore, 51 is ○o, 52-56
57 to 59 indicate the interval of ○, 60 indicates the time of ○, 61 indicates the interval of ○, and 62 indicates the time of ○. Therefore, an emergency stop immediately after the start is possible without wasting paper, and the delayed turning off of the lamp prevents uneven charge removal on the drum.
If the STOP mode is not reached until the point ○O, the process proceeds to paper feed B 26 and thereafter. 26 indicates ○o, and the section from 27 to 30○sa, and waits for detection of DHP omission due to drum rotation. 13 to 36 indicate the section of ○, and wait for the PF to pass. Also, the clock signal CP
The PF is read in synchronization with the PF, and the CP is counted to 34 at the same time as determining when the PF is coming out. 37 refers to the time of ○ce. Reliability can be increased because the next step is executed only after determining whether the DHP or PF is missing. Also, at this time, a check is performed for the remaining jam after the second COPY cycle, which is indicated by numbers 38 to 45, but this time it is the first copy, so it is 38.
It determines that Flag6 is not set and jumps to 46 onwards. 46 to 49 indicate the interval ○so, which is the interval in which the counting is started from the time ○o (the number of pulses is set to 67 at 31) and waits for the CP to reach the set value of 67. The time point reached is 50, that is, the time point ○ta in FIG. At this point, the developer plunger
The optical system advance motor and exposure lamp are turned on, as well as the pre-exposure lamp G. However, in the case of half size, G is only turned on during the first copy cycle, and not for the second and subsequent copies, so this At this point, it is necessary to determine whether the cycle is half or full (65) and whether it is the first copy cycle (63), and these are shown in 63 to 66. Now it's the first card of the half, so jump to 63-66 and G is also on.
let CP counting starts again at 87 counts from point ○. During this process, the routine waiting for OHP to become CFF is 67 to 70, which refers to the circled section in Figure 3. The time point when the OHP turned OFF is 71, which is indicated by ○C in Figure 3. Therefore, the accuracy of the sequence is increased because the next step is only proceeded to after determining whether the OHP is missing. Also, at this point, a delay jam check is performed in the case of a half "MULTi" copy. After entering the second and subsequent copy cycles, a jam check is performed on the paper from the previous copy cycle.
It is ignored by Flag6 and jumps from 72-73 to 81. This half delay jam check is 72~
It is indicated by 80. Furthermore, since the blank lamp is kept on until the point ○C, it is possible to eliminate potential unevenness in the unexposed area when the exposure lamp rises. 87 in 81-82
The section marked with ○hi in Figure 3 is the section in which the count is waited for. Furthermore, counting 105 from here is 84 to 85, indicating the section to ○. The time point when the count reached 105 indicates 86 to 101 and 112,
This is the point in time at the half size inversion position in FIG. At this point, as shown at 86-91, it is determined whether the designated cassette has run out of paper. (86) AUTO determines whether to switch to another cassette when paper runs out.
(87), and whether the cassette sizes are the same (88). If the above conditions are satisfied, the process passes through steps 85 to 89, switches the UL at 90 or 91, and proceeds to steps 92 and subsequent steps. In addition, the STOP judgment in 86 includes cases in which the STOP key is pressed and the cassette is removed, in addition to the case where the paper runs out, so in these cases, the UL is switched once, but the UL is switched again in 101. Since STOP is determined, 11
Proceed to the post-rotation after 2 and proceed to 1 of the key reading routine
There is no problem because it will be restored when you return to 3. For this UL switching, the paper out determination at 86, the AUTO determination at 87, and the size match determination at 88 are performed at predetermined times between the first paper feed timings 24 to 26 and the second paper feed timings 107 and 26. Since it is executed, it is not judged during paper feeding operation,
Therefore, there is no risk of malfunction caused by switching during paper feeding operation. Furthermore, since the half-size optical system is inverted at the point of ○, it is determined whether it is half or full at step 92, and if it is full, it passes through step 93 and returns to step 190 in Figure 5-4.
Proceed to the subsequent steps, but since this is a half case, proceed to 94 and subsequent steps. Then, in steps 96 to 102, the copy count (CT ₂ + 1) is completed and compared with the set number CT _1. If the two match, and the STOP mode is activated, the copy count (CT 2 + 1) is completed and the copy count (CT 2 + 1) is compared. If a jam has occurred previously, the process proceeds to the post-rotation routine after step 112. If the above is not the case, go to the routines 103-111. 107 PF judgment and 2 of this routine
The paper feed output of No. 6 is the second paper feed timing. In this routine, if the STOP mode is entered within the time when the paper feed PF signal is input from the reverse position of ○E (as shown by timing 3 in Figure 3), the transformer switch J is turned OFF at the moment the STOP mode is entered. (106), 150count
It waits until it reaches , and jumps to the post-rotation routine from 134 onwards. The flow of time 103-104-105-
106-107-109-103-104-13
It becomes 4. If the STOP mode does not occur, until the PF is turned on (section marked with ○ in Figure 3),
103-104-105-107-109-10
Repeat 3..., and when PF turns on, 103-
104-105-108-Cut Flag5,
(Indicating that the second or subsequent copy cycle has started) Returns to the point in time when the paper feed roller control signal B of 26 is turned ON again. In FIG. 3, this refers to the time of ○chi, but from this point on, the same control contents as those of ○o to ○ta in FIG. 3 are basically repeated. However, if the optical system reverses (F) stops, the delay jam
Since the check is included in the copy cycle after the second copy, I will provide additional explanation only about this. 2
In the 32nd to 36th time, the PF was turned off after the DHP was turned off.
It shows the time until it turns OFF (section marked with ○ in Figure 3), but if the optical system reaches OHP within this time, 3
Pass through 5-36 and turn F off. Since the backward movement of the optical system and the rotation of the drum motor are asynchronous, there are variations in the time the optical system reaches OHP. Therefore, the sections 27-30 of ○sa and the sections 46-4 of ○2 in Figure 3
9) are provided with routines 29 to 30 and 48 to 49, respectively, which detect OHP and turn off F. The delay check on the first sheet is on the second sheet.
During the copy cycle, the optical system moves forward (E on)
Since this is done by detecting the arrival of paper to the detector 2 when the OHP is turned off, this refers to the time point marked with a circle in Fig. 3. This is checked in the routines 72 to 80 in Figure 5-2. If there is a delay and paper is not detected,
72-73-74-75-76-77-78-7
Pass through 9-80, set Flag4 and delay jam.
Remember what you did and copy count number CT ₂
Subtract one sheet and turn on jam solenoid I. If the jam killer switch is turned on and its instructions are read in Key entry routine 13, steps 77 to 80 will be ignored. The activated I is turned OFF at point 83 (at point ○ in Figure 3-2).Therefore, the machine can be test run without paper feeding. or,
Figure 3 only shows the timing diagram for the case of two-sheet copying, but if this is three or more sheets of copying, the first sheet of paper retention jam check (detector's paper stop check) is This is done when the PF turns OFF in the third copy cycle.
This is stated in 38-45. If the first copy is jammed, 38-39-4
It passes through 0-42-43-45 and enters the post-rotation routine after 135. At this time, Flag8 is set to remember that a retention jam has occurred, and in addition, since the third copy cycle has already started when the copy is half, _-2 is subtracted from the copy count CT2. However, if it does not stay, the process advances to 38-39-41, outputs the addition signal TC of the total counter (not shown), and increments the counter by 1. This TC is turned off at 50. Next, in Figure 3-2, there is a delay jam at ○.
Let us assume that the check has been completed and the second copy cycle has reached the optical system reversal position. At this point, the number of sheets set in 99 and the number of sheets counted match, so Flag3 is set in step 102, the fact that the mode ends due to the match is memorized, and the post-rotation routine from step 112 is entered. 113 to 133 indicate the section marked with ○mo in Figure 3, where CP is counted 150 times, and in parallel with this, wait for the optical system to reach OHP within that time, and when it reaches OHP, turn OFF F (115 -11
6) At the same time, check the retention jam of the first sheet of paper (SUBI from 117 to 126), and
Set Flag11. Once this is set, from now on, even if the optical system is in OHP, the retention jam check routine 118-125 will be executed at 117.
is ignored. This point refers to the point marked ○ in FIG. 3. Therefore, the retention jam check during post-rotation is performed only when the optical system reaches OHP. if,
If no delay jams have occurred before this point,
If the first sheet of paper causes jamming without instructions to kill jamming, 117-1
18-119-120-121-123-124
-125-126, set Flag8, remember that a retention jam has occurred, subtract -2 from the number of copies since it is half size, and set the jam solenoid I.
Turn it on. (Figure 3), then Flag11 is set
Therefore, jump to 117-127. However, if there is no retention when the optical system reaches OHP, 117-118-119-120-
The total counter signal progresses from 122 to 126.
Turn on TC. On the other hand, the start key input routine SUBH from 127 to 133 must be passed within the time it takes to count this CP to 150, but when the set number and the number of copies match, the machine goes to the post-rotation routine or enters the SINGLE mode. Only when entering the post-rotation routine, this third -
Since the MULTI or SINGLE keys are accepted from the point marked with ○ in Figure 2, this routine reads them. For example, if the MULTI key is pressed, it will pass through 127-128-129-133,
127-128- if the SINGLE key is pressed
Pass through 129-131-132-133. Therefore, when using the MULTI key, set Flag9 to 0 and Flag7 to 1.
When pressing the SINGLE key, set Flag9 to 1 and Flag7 to 1.
Make it. Flag9 is for determining whether MULTI is SINGLE,
Flag 7 is used to remember that a restart command was received during backward rotation. When the CP count reaches 150, it is 134, indicating the point in Figure 3. 135,1
36 and 137 are provided for safety because the point at which the optical system reaches OHP varies. 138-1
40 indicates the section ○yo in Figure 3-3, and is the section in which the CP counts 38 counts from the point ○Y. The point at which the count reaches 38 is the point ○a in Figure 3-3. Here, I or TC, which was turned ON at the time of ○ya, is turned off (141), and the final
This is also the time to perform a delay jam check on the copy paper. The flow at this point is shown at 142 to 149, and a jam check is performed if no retention or delay jam has occurred before this point and there is no command to kill the jam. If jammed, turn on I, set Flag4 and copy count
Subtract -1 from . However, in SINGLE mode, this subtraction is ignored. (147). 150-15
2 indicates the section circled in Figure 3-3, and 60 counts of CP are counted. The point at which this value is reached is 1
At step 53, turn off the I that was turned on in the jam check above.
do. Figure 3-3 indicates the point of ○. 154～
156 is the waiting time for reaching the OHP, which corresponds to the circled section in Figure 3. In FIG. 3-3, SUBHs are provided at 140, 152, and 156 in order to receive the MULTI and SINGLE keys in the section from ○Me to ○Ro. Then, when OHP is reached (circle in Figure 3), motor on signal A is activated at 157.
Turn off. 158 indicates the section of ○wa, and 159 indicates the time point. If a delay or a jam has occurred before this, the jam release routine from 160-161 to 182 onwards is entered. If this is not the case and there is no jam killing command (162), the last copy paper is checked for remaining jams. If the retention check is OK, 164,1
Turn TC ON and OFF at 65 and 166, and if the set number and copy number match and the end mode is entered, 1
The number of copies is cleared in steps 67-168, and if the MULTI or SINGLE key is not pressed during post-rotation, the process passes through steps 169-175 and returns to the key reading routine in step 13. If pressed,
In the case of the MULTI key, it passes through 169-170-171, determines whether the set number is 0 at 173, and then
At this time, the key reading routine of 13 is entered through 175, and the MULTI key being rotated afterward is ignored.
If it is not 0, it passes through 173-174 and jumps to 19 to start copy cycie again. On the other hand, if the SINGLE key is pressed, 171-170-172-17
Pass through 4 and jump to 19 and copy in SINGLE mode again
Enter the cycle. In the above-mentioned retention check, if the data is retained, I is turned ON and OFF, and the number of copies - 1 is subtracted. 163-176-177-178-179-
180-181). However, if it comes in SiNGLE mode, -1 is not subtracted. 182 to 189 are the jam release routines of I.
Jam mechanism latched with ON and OFF (No. 9-2)
The routines 182 to 184 wait for the jam switch that is turned on to be released (reset button turned on) by the button shown in the figure. been canceled
When it becomes OFF, proceed to 185 and after, and here the MULTI or
For SiNGLE, MULTI for MULTI,
SiNGLE is waiting for SiNGLE to be pressed. Therefore, if MULTI was previously pressed,
Go through 185-186-187-188 and jump to 19 to copy the remaining number of copies. For SiNGLE, go through 185-186-187-189 and get to 19. Therefore, other combinations are not accepted. Next, with reference to the full-size timing chart in FIG. 4, the flows in FIGS. 5-4 and 5-5 will be explained. ○A to ○H in FIG. 4-2 follow the same flow as the flow up to that point in FIG. 3, so the explanation will be omitted. Therefore, the point marked by ○ is the half-size optical system inversion position, but this time it is full-size, so the point from here on is different from the half-size. Therefore, this circle points to flows 86 to 92, but in the size determination at 92, it passes through 93 and jumps to 190 and beyond. 190 to 191 is a routine that waits for the optical system to advance further from the half-size optical system inversion position and count 150 CP, and refers to the section in Figure 4-2. And FULL when it reaches 150 counts
The SIZE optical system is inverted (at the point in Figure 4). In the flow, it refers to 192 to 198. In this way, since the reversal position of the optical system is selected based on the count number for each size from a subsequent predetermined position or timing rather than the start point of the copy cycle, a highly accurate reversal position can be obtained. 1 because it is a reversed position
At 92, turn off E and G and turn on F and L. Furthermore
In MULTI mode 193, if no jam has occurred before this point (194, 195), add 1 to the copy count at 196, and it is set
If it matches the COUNT number, 197 is 199-23
Proceed to 232 via 1. STOP when there is no match
When it is not in the mode, it flies through 231 and then 232 as well. Therefore, proceed to 200 and beyond only if you do not do so and are not in STOP mode. Therefore, at this point in time, there are two routes: one goes to 200 and beyond, and the other goes to 231 and beyond. First, the flow after 231 will be explained. Cases that enter this flow include when in SINGLE mode (193), when a jam has previously occurred (194, 195), and when set
When count and copy count match (197, 1
99), or when the mode is in STOP mode due to mismatch (197, 198), and it can be considered that the time point in FIG. 4 has apparently moved to the time point in FIG. Therefore, it is currently the first copy count, so only when the STOP mode is entered →
It can be assumed that the sequence is executed. Since this is the routine for the first of two copies, we will explain the case where the copy count is incremented by 1 and the process advances to 200 or later. 200-201 refers to the section in Figure 4-2, and the time point when 38 cp counts is indicated by in Figure 4. At this point, a copy paper delay jam check is performed, and the check flow is shown at 202-208. This jam check is effective when there is no jam kill command (203), and if the copy paper is delayed, flag 4 is activated.
set, turn on jam solenoid I, copy count
Subtract -1 from and turn J OFF. This timing diagram is shown at 2 in FIG. Also, this copy
Subtraction of count is in Sin GLE mode (206)
is ignored. Next shown as 209,210
The time to count 112 cp is shown in the section of Fig. 4. The point in time when 112 counts are reached is shown in FIG. At this point, the above is ON
At the same time as the I is turned off, it is determined whether a delay jam has occurred (212). If a jam occurs, as a result of the determination in 212, the process proceeds to 213 and subsequent steps to satisfy the timing 2 in FIG. 4. At the first point, turn off K (21
4) Wait for the optical system to reach OHP at steps 214 and 215. This section refers to the section circled in Figure 4.
The point at which OHP is reached is indicated by the circle in Figure 4, and F is reached.
OFF (216), next comes to 217, 218
Search for DHP (circled section in Figure 4), and when it reaches DHP, wait for DHP to turn off at 220, 221 (circled section in Figure 4). 15 when DHP is OFF
Jump to 4 or later, wait for DHP to come again (circle section in Figure 4), and finish the copy operation. Determination of jam at the time of if (212)
So, if it's OK, watch the OHP come to 223, 22
Wait at 226 and 227 for the PF signal to arrive (section 4 in Figure 4), then CFF F at 225 (section 2 in Figure 4) for the PF signal to arrive.
The time when PF is reached is the point ○ in Figure 4, and if the STOP mode is entered at this point, the flow is set to 228 to satisfy the timing of 3 in Figure 4.
Determine STOP with , and proceed to 222 and subsequent steps. 229 J.
Turn K off, wait for PF to turn off at 257-260, look for DHP that will come after the next rotation, and stop the copy cycle. If STOP
If it is not the mode, set Flag5 and 6 at 230, and set 2
Jump to 26 to enter the copy cycle for the second copy.
Therefore, ○chi to ○mi in FIG. 4-3 flow in the same flow as ○chi to ○mi in FIG. However, since the retention jam check for the first sheet of copy paper is performed at the time of the copy cycle for the second and subsequent sheets, the check flow is shown in 38-45. If it stays 38-39-40-42-43-
44, jumps to 217 and satisfies the timing 4 in Figure 4. First of all, as soon as you stay, JK
Turn OFF, set Flag8, and subtract -1 from the number of copies. After that, the program jumps to 217 and rotates the drum until DHP is detected, and then the copying ends. In the copy cycle for the second full-size copy, the same flow as half-size is executed for ○chi to ○me, and the time point at which both branches branch is at the time of ○me. flow 92
is the half reversal position. Therefore, the section of FIG. 4 is the time 190 to 192 explained above,
The point is the full size inversion position, and the number of copies matches the number of sets at 196, so 192-19
3-194-195-196-197-199-
Turn J off (primary charging off) via 231
Then, the process proceeds to the post-rotation routine starting at 232. 232 to 234 indicate the time for counting 38 cp, which corresponds to the section in FIG. 38 counts (in Figure 4, the delay jam check is performed for the last copy paper, and in the flow it is 2)
35-241. Here, even if a jam has not occurred before (235) and there is no command to kill a jam (236), if a jam check is performed and a jam occurs, the jam solenoid I is turned on and the copy count is started. -1 subtraction.
However, in the SiNGLE mode, the copy count is not subtracted (240). 242-244 are the fourth
This refers to the section in the figure, which is the time when 60 counts of cp are being counted. When this count is reached, the above 24
Turn off I that was turned on in step 1 (Figure 4). Furthermore, count cp by 52 at 246 to 248 (see FIG. 4), and turn off bias K at 249 (see FIG. 4). Wait for the optical system to reach OHP at 250-252 (section 2 in Figure 4), and turn F off at 253 (section 2 in Figure 4). After that, 254-256
Wait for the paper feed cam pF to turn ON at (Figure 4), and then wait for it to turn OFF at 258-26.
Wait at 0. And when it goes OFF, the drum will move to the next one.
Wait until it rotates and reaches DHP (154-15
6. ○A in Figure 4) Finish the copy cycle. In addition, 234, 244, 248, 252, 25
6,260, the subroutine SUBH is placed in the rube within the time after the point in time.
It is provided so that the MULTI or SiNGLE key can be read. Also, the "INTERUPT" key has the same function as the "STOP" key, and it similarly shifts to the post-rotation mode. Moreover, at this time, the indicators 25 and 26
The set number and count number are transferred to a set of registers in the memory RAN, and new values can be entered on the display. After this, execute the flow from the key entry above. When copying is complete and you enter post-rotation mode, press the “RECALL” key and the original value stored in the above register in RAM will be displayed on display 2.
5, 26 and press the "MULTI" key again to copy the remaining number of sheets. Figure 9 shows devices related to jamming safety. Figure 9-1 shows a door switch for safety when handling jammed paper. The microswitch DS that turns the power on and off is illustrated. Figure 9-2 shows the fixing device and the jam solenoid.
The mechanism for turning off the DC high voltage power supply is illustrated. When a jam occurs, the solenoid SL is activated and pulls up the lever 92 with the dowel 91 attached, causing the release lever 93 fixed by the dowel to lose its fixed point and rotate by the spring 96, releasing the micro switch 94.
Turn off. Therefore, the above processing mechanism stops.
This can be canceled by pressing the reset switch 95. However, the main motor rotates the drum to the drum home position where the paper will be ejected. Table 1 shows an example of a program code list of command words and the like for executing the programs shown in FIGS. 5-1 to 5-7 in accordance with the manual for PPS-4/I.

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【table】 [Brief explanation of the drawing]

FIG. 1 is a sectional view of a copying apparatus to which the present invention can be applied, FIG. 2 is a plan view of the operating section of the apparatus shown in FIG. 1, and FIGS. 3-1 to 3-3 are half views of the apparatus shown in FIG. Operation time chart by size No. 4
Figures 1 to 4-3 are full-size operation time charts, Figures 5-1 to 5-7 are control flowcharts of the device in Figure 1, and Figures 6-1 to 5-7 are control flow charts for the device in Figure 1.
Fig. 6-5 is an example of a control circuit according to the present invention, Fig. 7 is an internal circuit of the computer used in Fig. 6, Fig. 8 is a control time chart at power-on, and Fig. 9-
Figure 1 and Figure 9-2 are cross-sectional views of the safety device and jam release device in the device shown in Figure 1.
In Figure 1, CPU is a computer chip element, G is an output gate circuit, M is an input matrix circuit,
25, 26 are indicators, P11-4 are input terminals, G
is a scanning output terminal, and D1 is a load output terminal.

Claims (1)

[Claims] 1. A first sheet storage section 21 and a second sheet storage section 22 each capable of storing a plurality of sheets; a command signal for selecting and feeding one of the plurality of storage sections; Command means to input (UPPER)
CASSETTE key, LOWER-CASSETTE key), storage section detection means 23a, 23b that outputs a signal indicating the presence or absence of sheets in each storage section, size detection means (MS13, 19, 21, MS12, 20, 22), means for outputting a selection signal for the storage section based on a command signal from the command means and a sheet presence signal from the storage section detection means in the first storage section when there is a sheet in the first storage section; (Fig. 5-1, Fig. 6-2), an input means (AUTO key) to arbitrarily select the automatic switching of storage compartments, and when there are no more sheets in the first storage compartment, the first
A no-sheet signal (STOP) from the storage section detection means in the storage section, a storage section switching selection signal (AUTO) from the selection input means, and a size match determination in the first and second storage sections by the size detection means (step 88)
and control means (Fig. 5-2) for outputting a selection signal for the storage section, and the control means determines whether or not there is the automatic storage section switching selection signal (step 87). The first sheet feeding timing (steps 24-26) and the next second sheet feeding timing (steps 107-26)
A feeding control device characterized in that the device is operated at a time between.