JPS6227253A - Cut sheet recording device - Google Patents

Abstract

PURPOSE:To make it possible to facilitate the preparation of a paper feed cassette, by providing such an arrangement that the size of cut sheets read out from a RAM in accordance with an instruction of a certain copying condition is displayed, and if no cut sheet storage means containing copying sheets whose size is coincident with the read-out size is loaded, such a condition is displayed. CONSTITUTION:When a numbered copying condition is inputted from keys 72, 91, 92, the size of cut sheets read out from a nonvolatile RAM in accordance with the number of the copying condition, is displayed on a designated sheet size display unit 76. Further, the read-out size is compared with the size of cut sheets in a paper feed cassette which is detected by a detecting means. If both sizes are coincident with each other, the cassette is selected while a confirmation display lamp 77 is turned on. Further, when a printing key 88 is operated, a feed-out means corresponding to the selected cassette is energized. Thus, it is possible to prevent the size of cut sheets from being erroneously selected, and further, if no paper feed cassette containing cut sheets whose size is coincident with the read-out size is loaded, it is possible to prepare an appropriate paper feed cassette.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a recording device such as a printer or a copying machine that records an image on a cut sheet, and particularly relates to a recording device that records an image on a cut sheet, one of which is stored in advance. The present invention relates to a recording device that can be called up by a simple key operation.

2. Prior Art For example, in recent years, copying machines have been enriched with functions, and various copy modes (copy conditions) can be set to meet the various demands of operators.

In addition, it is equipped with a multi-stage paper feed tray and has a removable paper feed force cellar 1.
Always using to.

It is possible to load several types of recording paper of different sizes.

Although these functions have become more multifunctional, the operator's operations have also become more complicated, resulting in the inconvenience of having to operate many operation key switches to set the required operation mode each time a copy is to be made.

Therefore, memorize several copy modes in advance,
A copying apparatus has been proposed in which this information can be called up by a simple key switch operation.

According to this, a desired copy mode can be easily set by performing a predetermined key switch operation when making a copy.

However, in a conventional copying apparatus of this type, when there is a plurality of paper feed trays, the type of paper feed tray is stored instead of the size of the recording paper.

For example, if a copying machine is equipped with two paper feed trays (upper and lower) and a paper cassette is attached to them, it is possible to specify whether the paper feed tray is the upper paper feed tray or the lower paper feed tray based on the copy mode called up.
It is not possible to specify a recording paper of a predetermined size. Therefore, if the upper and lower paper cassettes are swapped, the operator may perform an operation without noticing this, and the
There was a problem where copies were made onto recording paper of a different size.

(1) Purpose of the Invention It is an object of the present invention to prevent errors in cut sheet size when recalling and setting a stored operation mode in a cut sheet recording device.

■Structure of the Invention In order to achieve the above-mentioned object, the present invention includes a plurality of cut sheet storage means, a plurality of feeding means for feeding cut sheets from each of the sheet storage means, and a sheet fed out from the feeding means. In a cut sheet recording apparatus having a conveyance means for conveying a sheet to a recording section and a recording means for recording an image on a sheet conveyed by the conveyance means: a size detection means for detecting the size of the cut sheet accommodated in the cut sheet accommodation means; at least one Size storage means for storing the cut sheet size for recording; instruction means for instructing to read the cut sheet size from the size storage means; readout control for reading out the cut sheet size stored in the size storage means in response to instructions from the instruction means; means; display means; display energizing means for energizing the display means; display control means for instructing the display energizing means to display the cut sheet size read out by the readout control means; cut sheet size read out by the readout control means and size detection A selection control means that compares the cut sheet size detected by the means and selects a cut sheet storage means that stores a cut sheet of a size that matches the read cut sheet size; A feed-out urging means for sending out and urging the feed-out means corresponding to the cut sheet storage means selected by the selection control means;

According to this, the cut sheet size read from the size storage means in response to an instruction from the instruction means is compared with the cut sheet size detected by the size detection means, and a cut sheet of a size matching the read cut sheet size is cut. Since the cut sheet accommodating means for accommodating the sheet is selected, errors in the cut sheet size can be prevented.

In addition, since the read cut sheet size is displayed, 1. For example, if there is no cut sheet storage means that stores cut sheets of a size that matches this size, the operator can see this display and use the readout to specify the cut sheet size. Since the size can be known, an appropriate cut sheet storage means can be prepared.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

FIG. 1 shows an outline of the mechanism of a copying apparatus according to an embodiment of the present invention. This will be explained with reference to FIG.

] is the contact 1~glass where the original is set.

2 is an automatic document feeder/discharge device that also serves as a pressure plate (hereinafter referred to as ADF device)
It is.

Even if you open the pressure plate 2 and set the original directly on the contact glass 1, you can use the ADF device i! 2 document mounting table (first
It may also be set on the right side of the ADF device 2 in the figure. In the latter case, when the ADF device 2 detects that there is a document on the document table, the copy start instruction input becomes an ADF start instruction, and after feeding the document and placing it in a predetermined position on the contact glass 1, the ADF device 2 Device 2 issues a copystar 1-instruction. There are two operation modes of this ADF device 2. The first is manual copy start instruction → document edge on the document placement table → copy → document ejection and folding of the next document → . . . ADF mode that continues until all the originals on the loading table are used up!・The second is manual input of copy start instruction → loading of original on document table → copying → ejection of original → waiting for input of copy start instruction,
This is the S A DF mote.

In both cases, when the original is set directly on the contact glass 1 and when the ADF device is used, the original is pressed down by a white belt stretched across the contact surface between the contact 1 and the glass 1 of the ADF device 2. and is brought into close contact with the contact glass 1.

An optical scanning system comprising an exposure lamp 3, a first mirror 4, a second mirror 5, a third mirror 6, a condenser lens 7, a fourth mirror 8, etc. is provided below the contact glass 1. Light reflected from the original by exposure lamp 3 is guided to photoreceptor drum 9 by this optical system. The copying apparatus of this embodiment is of a document fixed type, and includes a first carriage (not shown) equipped with an exposure lamp 3, a first mirror 4, etc.;
A second carriage (not shown) carrying a second mirror 5, a third mirror 6, etc. is driven at a speed ratio of 2:1, and the original is scanned while keeping the optical path length constant. This document scanning is performed by a photosensitive drum 9 rotating at a constant speed.
(clockwise in FIG. 1), and in the case of full-size copying, the moving speed of the surface of the photosensitive drum 9 rω [cm/
5ecl (r: radius of photoreceptor drum 9 [cml, ω: rotational angular velocity of photoreceptor (helam 9 [rad/seC]),
The document scanning speed v [cm/sec] is set to be equal. In the case of an enlarged copy, if the enlargement rate is M,
Since the condensing lens 7 moves to the left on the optical axis in FIG. is set to 1/M of the moving speed rω [cm/sec]. In the case of reduction copying, if the reduction ratio is 1/m, the condenser lens 7 moves to the right on the optical axis in FIG. Since it is reduced, the document scanning speed V
[cm/5ecl is the moving speed r of the surface of the photosensitive drum 9
It is set to m times ω[cm/see].

Around the photoreceptor drum 9 are a charger 10° and a developing unit 11. Transfer charger 121 Separation charger 13
．． A cleaning unit 14 and the like are arranged.

There are a total of 5 paper feed trays, from the top: the 1st paper feed tray, the 2nd paper feed tray.
They are called a tiered paper feeding tray, a 3rd tier paper feeding tray, a 4th tier paper feeding tray, and a 5th tier paper feeding tray. Each paper feed table has a removable paper feed force cell l-15, ], 8.21. .

24.27 is installed.

This copying apparatus can feed up to A3 size recording paper in the longitudinal direction (hereinafter referred to as "horizontal feeding"; on the other hand, paper feeding in the transverse direction is referred to as "vertical feeding"). Therefore, for A3 horizontal feeding, for A4 vertical feeding, for A4 horizontal feeding, for A5 vertical feeding, for A5 horizontal feeding, for B4 horizontal feeding, for B5 vertical feeding, for B5 horizontal feeding, Eleven types of paper feed cassettes are available: B6 vertical paper feed, B6 horizontal paper feed, and universal paper feed (free size). These paper feed cassettes are equipped with a detection mark that indicates the type (paper size accommodated), and is read by a paper size detection sensor (57) provided on each paper feed table when the cassette is installed. Specifically, the size detection sensor (57) is a photo-interrupter, and when a cassette is attached, a light-shielding filler with a detection mark enters and reads the type of paper feed cassette that is attached by transmitting/blocking light (the detection mark is attached to a magnet 1). - may be read by turning on/off a magnetically sensitive reed switch). The coating of the detection mark is shown in Table 1 below.

However, in Table 1, "0" indicates light transmission (no light blocking filler), and "1" indicates light blocking (with light blocking filler).

Table 1 When the first stage paper feed tray is selected, the recording paper stored in the paper feed cassette 15 is fed out by the paper feed roller 16 and the feed roller 17 toward the registration roller 3o,
When the second stage paper feed tray is selected, the recording paper stored in the paper feed cassette 18 is fed out toward the registration rollers 30 by the paper feed rollers 19 and the feed rollers 2o.
When the third paper tray is selected, the recording paper stored in the paper feed cassette 21 is fed out by the paper feed roller 22 and feed rollers 23.48 toward the registration roller 3o, and the recording paper is fed to the fourth paper tray. When is selected, the recording paper stored in the paper feed cassette 24 is fed out toward the registration roller 3o by the paper feed roller 25 and the feed rollers 26, 47° 48, and the fifth stage, the paper feed tray, is selected. Then, the paper feed roller 28 and feed rollers 29, 45, 46, 4
At step 7.48, the recording paper stored in the paper feed cassette 27 is fed out toward the register 1-roller 30.

The registration rollers 30 feed the recording paper fed out at a predetermined timing to the photoreceptor tram 9 (sheet feeding).

On the downstream side of the photosensitive drum 9, a conveyor belt 31. Equipped with a fixing unit such as Uniso H32.

The conveyance path of the recording paper after leaving the fixing unit is divided into two ways. One is a paper discharge conveyance path that discharges paper to a paper discharge tray 35 via a paper discharge roller 34 when the switching claw 33 is lowered (the state shown in FIG. 1), and the other is a This is a paper refeed conveyance path that leads to the intermediate tray 36 via feed rollers 39 and 40 when the switching claw 33 is raised (rotated in the direction of the arrow in FIG. 1).

In the double-sided copy mode, when copying the front side, a switching solenoid (not shown) is energized, the switching pawl is rotated, the paper re-feeding path is selected, and the copy side is recorded on the intermediate tray 36 with the copy side facing up. Study the paper. From the paper refeed transport path to intermediate tray 3
The recording paper stored in 6 (with a copy on the front side) is
The right-shifting roller 37, which rotates in the direction of the arrow, shifts the intermediate tray 36 to the right side in FIG.
2, 43, 4, 4, and 48 toward the registration rollers 30. Thereafter, the registration roller 30 sends this recording paper to the photosensitive tram 9 at a predetermined timing, but at this time, the side with the copy is facing down and the back side is the transfer surface.

The intermediate tray 36 has an opening/closing lid on the left side in FIG. 1, and when double-sided copying is to be canceled, the recording paper on which the front side has been copied can be taken out from there.

An overview of the copy process will be explained. The copy process can be divided into a start cycle, a copy cycle and an end cycle.

After operating the operation board and inputting predetermined copy conditions, the operator sets the document and inputs a copy start instruction.

When using the ADF device 2, this instruction becomes an ADF start instruction, and the ADF device 2 retracts the document on the document table a, sets it at a predetermined position on the contact glass 1, and then issues a copy start instruction.

In response to a copy start instruction, a start cycle is first executed. The start cycle is performed for the purpose of stabilizing the mechanical drive system and unifying the initial exposure conditions. A drive source such as a main motor is energized, and then the photoconductor drum 9 is rotated and the photoconductor surface is rotated. Cleaning is carried out. At step 29, the grounded conductive brush and cleaning blade provided in the cleaning unit 14 wipe away toner, carrier, etc. that have adhered while the apparatus is stopped, and the static electricity is further removed by a static elimination lamp (not shown).

Upon completion of cleaning and neutralization of the photosensitive surface (end of start cycle), a copy cycle is executed.

In this case, 5 charging of photosensitive surface → electrostatic latent image formation → development →
Transfer is performed in the order of fixing. First, charger 1
0, the photosensitive surface of the photosensitive drum 3 is uniformly charged to a high positive potential, and an eraser (not shown) erases unnecessary areas according to the paper size.

The optical system is energized at a predetermined timing and the exposure lamp 3 is activated so that the exposure of the leading edge of the document matches the leading edge erase end position.
The original is irradiated by the scanner, and the original is scanned by the first and second carriages.

The reflected light of the original is transmitted to the first mirror 4. 2nd mirror 5 and 3rd mirror
When reflected by the mirror 6 and condensed by the lens 7, it is reflected by the fourth mirror 8 and formed into an image on the photosensitive surface of the photosensitive drum 9.

When the photosensitive surface of the photosensitive drum 9, which is uniformly charged to a high positive potential, is irradiated with the reflected light from the original, the surface charge is removed depending on the intensity of the reflected light from the original due to a photoconductive phenomenon, and the electrostatic charge is removed. A latent image is formed.

Since this electrostatic latent image is formed negatively, the developing device 1
While passing through 1, negatively charged 1-ner adheres and is visualized (developed: positive image).

Before starting exposure, each paper feed cassette 15, 18, 21°24
．． 27 or intermediate tray 36 from lens 1 to roller 30
The recording paper fed out is stopped once in contact with the registration rollers 30, and is sent out toward the photoconductor tram 9 at a predetermined timing according to the rotation of the photoconductor drum 9.

When the recording paper passes directly above the transfer charger 12 to which a predetermined voltage is applied, it comes into contact with the toner image formed on the photosensitive surface of the photosensitive drum 9, and the toner image is transferred.

That is, the registration roller 30 maintains a delivery speed Vp [cm/s] equal to the moving speed rω[cm/sec] of the surface of the photosensitive drum 9 so that the toner image and the recording paper are exactly aligned.
ee] to feed the recording paper.

After the toner image has been transferred, the photosensitive surface passes through the cleaning unit 14 and is cleaned and neutralized to remove residual toner and carrier in the same manner as described above.

The recording paper onto which the toner image has been transferred is separated from the photosensitive surface of the photoreceptor tram 9 by a dividing charger 13 and a dividing claw (not shown), and then transferred to a fixing unit 32 by a conveyor belt 31.
sent to. The fixing unit 32 is a pair of rollers with a built-in heater, and the toner image on the recording paper is fixed here.

1. For copying in single-sided copy mode (outside duplex copy mode) or back-side copying in double-sided copy mode, the switching drive solenoid (not shown) of the switching pawl 33 is used.
Since the switching claw 33 is not energized, the switching claw 33 is lowered, and the recording paper that has left the fixing unit 32 is transferred to the paper ejection roller 34.
The paper is ejected to the paper ejection tray 35 via. When copying the front side in double-sided copy mode, the switching drive solenoid of the switching pawl 33 is energized, so the switching pawl 33 rotates in the direction of the arrow and moves upward, causing the fixing unit 1 to 32
The recording paper that has come out is guided to the intermediate tray 36 via feed rollers 39 and 40.

After repeating the above copy cycle for the set number of sheets, in the end cycle, the photosensitive drum 9 is further
Rotates to clean and neutralize the photosensitive surface. This end cycle is performed to maintain stability and protect the photosensitive surface of the photosensitive drum 9, so the processing content is the same as the star 1-cycle, and if a copy start instruction is issued while the end cycle is being executed, the start cycle is executed. Omit this and execute from the copy cycle.

FIG. 2 is a block diagram schematically showing the control system of the copying apparatus shown in FIG. 1. This will be explained with reference to FIG.

In FIG. 2, each overline indicates that the terminal is L active, and Vcc indicates a constant voltage or a terminal to which a constant voltage Vcc is applied.

This control system consists of a main microcomputer (hereinafter referred to as MCPU) 50 and three sub-microcomputers (hereinafter referred to as 5 ICPU, 52 CPU, 53 CPU).
It is mainly composed of.

The MCPU 50 centrally controls this control system, and its pass line includes a read-only memory (ROM).
52, read/write memory (RAM) 53.1/○ device 56, S I CPU 62, etc. are connected. Decoder 51 and latch circuit 61 are bus drivers.

The ROM 52 mainly stores control programs necessary for controlling the copying apparatus.

In the RAM 53, each processing parameter (copy condition) necessary for each copy process is sequentially written and read out as necessary.In addition, this RAM 53 has a non-volatile memory area backed up by a battery, Several sets of copy conditions are stored in association with the numbers.

54 is a battery backup circuit for backing up the R and AM 53, and 55 is an electric/tXS pressure monitoring circuit. The power supply monitoring circuit 55 outputs a reset signal (L level) for a predetermined time when the power is turned on, and a constant voltage Vcc (for example, +
5v) becomes below a predetermined voltage (for example, 4.5v), a reset signal (L level) is generated. This reset signal is for MCPU50゜5ICPU62S2CPU63,53
CPU.

I10 device 56 and battery backup circuit 5
It is applied to the reset terminal of No. 4.

When a reset signal is applied to the battery bank amplifier circuit 54, the transistors T r 1 and T r 2 enter the cut-off state. As a result, the constant voltage input terminal (Vcc) of the RAM 53 and the chip select input terminal CE
The voltage of battery BT will be applied to. Since the voltage of the battery BT is set lower than the constant voltage Vcc (for example, 3), writing to the RAM 53 and reading from the RAM 2S are impossible.

When the power supply voltage is unstable, the power supply voltage monitoring circuit 55 may malfunction, so the battery bank up circuit 54
A Zener diode ZDL is inserted between the reset 1 and input terminals. This Zener diode ZDI prevents the battery backup circuit 54 from malfunctioning due to a reset signal that fluctuates below the Zener potential (for example, 4V).

After the power is turned on or after the constant voltage Vcc is restored, when the reset signal becomes 1-level after a predetermined period of time has passed, the 1-transistor T r 1 is turned on via the Zener diode ZDI.
Since the base current flows through , T r 1 turns on,
As a result, transistor T r 2 is also turned on. Therefore, at the constant voltage input terminal (Vcc) of the RAM 53,
A constant voltage Vcc is applied to the chip select input terminal CE.
Since the L level is applied to , writing to and reading from the RAM 53 becomes possible.

That is, this reset signal prevents the memory contents from being destroyed due to the influence of noise when the power is turned on, which tends to occur in battery-backed memories and the like.

When the L level is applied to the chip select input terminal CE of the RAM 53, the RD and W of the MCPU 50
Based on the R times signal, writing ti and reading from the nonvolatile memory area of the RAM 53 are executed.

Note that the MCPU 50 monitors the voltage of the battery BT of the battery back amplifier circuit 54 through the analog port ANO, and displays a warning (Fig. 3 Bat) when the voltage falls below a predetermined voltage (for example, 2.8 V).

The ■/○ device 56 is connected to a size detection sensor 57, its decoder driver 58, a motor and solenoid driver 59, a sensor unit 60, and the like.

In response to a reading instruction from the MCPU 50, the decoder 1 heliver 58 sets the reading of the detection mark on the paper feed cassette from the first dead paper feed tray to the fifth stage paper feed tray depending on luck.

The size detection sensor 57 includes 54 sets of 5 photointerrupters for reading the same pitch I on each paper feed tray connected in parallel, and 5 sets of 5 photointerrupters for detecting the presence or absence of recording paper on each paper feed tray connected in parallel. It consists of one set of reflective photosensors.

In other words, when the decoder driver 58 is set to read the first stage paper feed tray 7, the paper feed power center mounted on the first stage paper feed tray is determined by the four photo interrupters for each bin j to reading. The decoder driver 58 reads the detection mark (see Table 1 °) and the presence or absence of recording paper in the paper feed cassette using a reflective photo sensor;
If reading of the paper feed tray is set, use the four photo interrupters for reading each bit to set the detection mark of the paper feed cassette attached to the second paper feed tray to 5 and 5.
The reflective photo sensor reads the presence or absence of recording paper in the paper feed cassette; similarly, the detection mark of the paper feed cassette mounted on the third stage paper feed table and the presence or absence of recording paper.

The detection mark of the paper feed power center installed on the 4th stage paper feed tray and the presence or absence of recording paper, the detection mark of the paper feed power sensor 1- installed on the 5th stage paper feed tray and the presence of recording paper. Read None. With this reading, the MCPU 50
For each paper feed tray, the LSB to 3rd bit indicates the size of the recording paper (see Figure 1), the 4th to 6th bits indicate the number of the paper feed tray, and the MSB indicates the presence or absence of recording paper. Create 8-bit size data and write it to the size table of RAM 53 (normal read/write area).

FIG. 4a shows an example of the size data of the second stage feeding table of the size table. FIG. 4a shows that a paper feed power center for A4 horizontal paper feeding is attached to the second stage paper feeding tray, and there is recording paper.

The motor and solenoid driver 59 includes a main motor, a paper feed motor, and each paper feed roller 16, 19, 22°25.28.
38 paper feed clutch solenoid 1~, registration roller 30
The register 1 to the clutch solenoid and the switching drive solenoid of the switching pawl 33 are connected to the MCPU 50.
These energization/deenergization controls are performed in response to instructions from the controller. Connected to the sensor unit 60 are a separation jam sensor, a toner (132 image unit 11) sensor, a drum (photosensitive drum 9) temperature sensor, a P sensor, and the like.

Input port P10 of S I CPU62. pH and output port P20. P2+ is connected to the control input/output terminal of the ΔDF device 2 and the sorter (not shown) via a connector, and data is exchanged serially from here.
A, DF2 and sorter control are being executed. Input port P14. A dip switch DIPsν connected to P15°P1.6 and PI3 is for specifying the type of ADF2 and sorter.

In addition, the input port RXD and output port TXD of the MCPU 50 have S2CPUs 63 and 53C, respectively.
An output port TXD and an input port RXD of a PU (not shown) are connected, and data is sent and received serially from there.

32 CPU 63 is provided on the operation board of the copying machine, and reads key operations and controls display.

When reading key operations, output ports PDO to P
Transfer the scan signal from D7 to driver 1 (64),
Signals corresponding to key operations transferred from buffer 1 (65) are read at input ports ANO to AN7. Specifically, in Fig. 2, a key switch consisting of a switch contact and a diode is indicated by O, which is connected to the output line of driver 1 (64) and the buffer ](6
5) is inserted at the intersection of the input lines of driver 1.
(64) sequentially outputs the I-level to the output line in response to the scan signal, so key operations are read by correlating the reading of the level of the input line of buffer 1 (65) with the scan signal.

When the key operation is read, it is written to the key operation data store area of the internal RAM, and the MCPU 50 writes it to the key operation data store area of the internal RAM.
When 63 is selected (select 1), serial read data is transferred from serial output terminal TXD of 52 CPU 63 to serial input terminal RXD of MCPU 50 by interrupt processing.

In the display, when 52CPU63 is selected by MCPU50 (select 1), MC
Serial display data output from the serial output terminal TXD of the PU 50 is read from the serial input terminal RXD of the 52 CPU 63, and written to the display data store area of the internal RAM.

In response to the scan signal output to the driver 1 (64), the S2 CPU 63 uses this display data to output signals from the output ports PAO to PA7 to the driver 2 (66) and from the output ports PAO to PA7 to the driver 3 (67). ) outputs a display signal to each.

Specifically, in FIG. 2, the indicator lamp made of a light emitting diode is indicated by a ◎ mark, which is the driver 1 (6
Driver 1 (64) is inserted at the intersection of the output line of 4) and the output lines of driver 2 (66) and driver 3 (67), and one end of a light emitting diode instructed to display by 1 display data is connected. ) becomes H level due to the scan signal, driver 2 (66) or driver 3 (67) to which the other end is connected
) is energized by setting the output line of the light emitting diode to L level.

The 53 CPU (not shown) includes a first carriage (not shown) on which the exposure lamp 3 and the first mirror 4 are mounted, and
It controls the speed of a second carriage (not shown) on which the second mirror 5 and third mirror 6 are mounted, and controls the position of the condenser lens 7 during zooming. That is, MCPU
When the 53 CPU is selected (select 2) by the 50, the serial scaling data and size data (recording paper size) etc. output from the serial output terminal TXD of the MCPU 50 are read from the serial input terminal of the 53 CPU, and are stored in the internal RAM. Write to the scaling data store area and size data store area respectively.

The CPU 53 controls the position of the condenser lens 7 according to the variable magnification data. Further, the document scanning speed and the document scanning range are set using the scaling data and the size data, and when a copy start instruction is received, document scanning control is executed at a predetermined timing.

Although not shown, the first carriage carrying the exposure lamp 3 and the first mirror 4 is equipped with a light receiver for detecting the background density of the original, which is led to the background density detection circuit via an optical fiber. (For details, see patent application No. 60-0060.
97). This background density detection circuit output terminal is 33C
Connected to the analog input port of the PU, 53CP
U reads this and stores it in the internal RAM as the original background data.
Stored at. In automatic density adjustment mode, MC
When the CPU 33 is selected (select 2) at a predetermined timing by the PU 50, the original background data is outputted from its serial output terminal to the serial input terminal RXD of the MCPU 50. The MCPU 50 sets a developing bias voltage based on this original background data, and performs optimum density adjustment according to the original.

FIG. 3 shows the external appearance of the operating board 1 operated by the operator.It will be explained with reference to FIG.

70 is a write key. This key is an alternate switch, and each key operation repeatedly sets and cancels write mode. In the write mode, the write indicator lamp 71
lights up.

72 is a call key. This key is an alternate function, and each key operation repeatedly sets and cancels the call mode. In the call mode, the call indicator lamp 73
lights up.

74 is a protect key. This key is an alternate switch, and the protect mode is repeatedly set and canceled every time the key is operated. In protected mode,
The protect indicator lamp 75 lights up.

76 is a designated paper size indicator that displays the recording paper size (designated paper size) specified by the copy conditions read from the nonvolatile memory area of the RAM 53 in the recall mode, and 77 is a designated paper size display that matches the designated paper size. This is a confirmation display lamp that notifies confirmation of paper feeding power when no paper feeding cassette containing recording paper is mounted on any of the first to fifth paper feeding trays.

78 and 79, when number 3 is specified in write mode, call mode and/or protect mode (hereinafter referred to as program mode), data (copy condition) is stored in the non-volatile memory area of RAM 53 associated with this number. 80 and 81 correspond to number 2, respectively. 82 and 83 respectively indicate whether or not the data associated with number 3 is written. 84 and 85 are number 4, respectively.
86 and 87 are data write indicator lamps that indicate whether or not the data associated with number 5 is written, and data protection indicator lamps that indicate whether or not the data is protected; A data write indicator lamp indicates whether the data is protected, and a protect indicator lamp indicates whether the data is protected.

Reference numeral 88 denotes a printer 1 key for inputting a copy start instruction (or an A, DF star 1 instruction).

This key 88 is a transparent display key switch, has a green lamp and a red lamp behind it, and is ready.
(Ready) Cent (copy possible) green lamp lights up (red lamp V1'1 lights), Ready reset (copy not possible) red lamp lights up (green lamp goes off).

8 is an interrupt key. This key is an alternate switch, and interrupt mode is repeatedly set and canceled each time the key is pressed. Interrupt display lamp 9 while setting interrupt mode
0 lights up. 91 is the numeric keypad. In program mode 1, a number specifying the nonvolatile memory area of the RAM 53 is designated by this key operation (only 1 to 5).

Further, copy cellar 1 to number of sheets are specified outside the program mode. The number of copies to copy sender 1 is 1 copy of the same original.
The number of sheets can be set between ~99 sheets, and the set number is displayed on the sheet number display 94.

Reference numeral 95 is a copy number display, which displays the number of copies.

93 is the C key. With this key operation, Copy Sera 1~
The number of sheets is set to the initial state (1 sheet).

96 is a double-sided key. This key is an alternate switch, and each key operation repeatedly sets and cancels duplex mode. When duplex mode is set, duplex display lamp 9
7 lights up.

There are two duplex modes; the first is a front copy mode and the second is a back copy mode. In the front copy mode, the double-sided display lamp 97 and the front display lamp 98 are lit, and front copy of the set number of recording sheets is executed.

When this is completed, the back copy mode is set, in which the duplex display lamp 97 and the back display lamp 99 are lit, and the intermediate tray 36 is automatically selected.
Executes a copy of the back side of a recording sheet that already has a copy.

101 is a dark key, and 102 is a light key 6. These are key switches used for manual density adjustment. There are 7 levels of manual concentration adjustment for this device.
Darker stages (lower numerical values) are sequentially set by operating the dark key Lot, and lighter stages (higher numerical values) are sequentially set by operating the light key=102.

Reference numeral 105 denotes a manual density display, and its mouth lights up to display the stage of the manual density being set. This display 105 shows a dark stage toward the left and a light stage toward the right.

103 is an auto key. This key is an alternate switch, and the automatic degree adjustment mode is repeatedly set and canceled every time the key is operated.

When automatic concentration adjustment mode is set, manual concentration display 1
The display 05 goes out and the auto display lamp 104 lights up.

100 is an error indicator, from the left: sorter error indicator,
Paper jam indicator, toner supply indicator.

1-ner collection indicator and call serviceman indicator. These indicators light up when a corresponding abnormality occurs.

10i3 is a paper end indicator, which indicates when no paper cassette is attached to the paper feed tray being set, or when no recording paper is stored in the paper feed cassette attached to the paper feed tray being set. At this time, this display z:9 lights up.

Bat is a warning indicator lamp that indicates an abnormality in battery voltage. This indicator lamp indicates that the battery BT of the battery backup circuit 54 is at a predetermined voltage (for example, 2.8V).
Lights up when below.

1071 is a copy permission indicator lamp, and 108 is a copy indicator lamp. When set to Ready (copy possible), the copy ready indicator lamp 107 lights up and the copy impossible indicator lamp 108 turns off), Ready reset (copy not possible)
Then, the copy not allowed indicator lamp 108 lights up (the copy allowed indicator lamp 107 goes out).

109 is a paper key. Each time this key switch is operated, the paper feed tray changes from the 1st paper feed tray → the 2nd paper feed tray → the 3rd paper feed tray → the 4th paper feed tray → the 5th paper feed tray → the 1st paper feed tray. : Update settings as paper feed tray →...

Reference numeral 110 is a paper size indicator, which displays the size of the recording paper in the paper feed cassettes installed on the paper feed table of each stage (A
3. A4. A5. ' B4. BS or B6 display, vertical or horizontal display, or universal (*) display] lights up. All the displays in the column corresponding to the paper feed tray to which the paper feed cassette 1- is not installed are closed.

The Ki paper tray being set is displayed by lighting up the outer frame of the corresponding column on the paper size display 110. When no paper feed cassette is installed on the paper feed tray of this stage, or when no recording paper is stored in the installed paper feed cassette, the paper end indicator 106 lights up.

111 is a reduction key, and 112 is an enlargement key. This copying device has a linear ratio Q of 5 to 2.0 (50% in percentage).
You can set any magnification ratio between 200% and 200%. When the reduction key 1 +-1 is operated, the scaling factor is updated to successively smaller values within this range, and when the enlargement key 112 is operated, the scaling ratio is updated to successively larger values within this range.

Reference numeral 113 is an equal magnification key, and when this key switch is operated, the magnification ratio is set to equal magnification (100% in percentage).

115 is the Xl, 15 key, and when this key switch is operated, the magnification is 1.15 times (115% in percentage).
), and the Xi, 15 display lamp 116 lights up.

117 is an Xo, 82 key, and when this key switch is operated, the magnification ratio is set to 0.82 times (82% in percentage) and the Xo, 82 display lamp 118 lights up.

+19 is the Xo, 71 key, and when this key switch is operated, the magnification is set to 0.71 times (71% in percentage) and the Xo, 71 display lamp 120 lights up.

114 is a magnification variable 1 τ that displays the magnification rate being set as a percentage.
It is an indicator.

121 is an ADF/5ADF key. This key is an alternator 1 switch, and the ADF mode and SADF mode are alternately set each time the key is operated. So,
ADF display lamp 12 corresponding to the mode currently being set
2 or 5 ADF display lamp 123 lights up.

124 is a saw 1-/stack key. This key is an alternate switch, and sort mode and stack mode are alternately set each time the key is operated.

In the sort mode, the sort indicator lamp 125 lights up,
Copies are automatically collated by a sorter (not shown).

In addition, in stack mode, stack display lamp 12G
lights up, and copies are automatically sorted by a sorter (not shown).

The outline of the control operations performed by the control system shown in FIG. 2 through the operation of each key switch provided on the operation board described above is shown in FIGS. 5a and 5b, mainly for setting copy conditions.
Figure 5c, Figure 5d, Figure 5e, Figure 5f, Figure 5g,
This will be explained with reference to the flowcharts shown in FIG. 5h, FIG. 51, and FIG. 5j.

First, the main terms used in these flowcharts are defined below.

Program register: Stores the number specified in program mode.

Set register: Stores the set number.

Store the density register 2'a degree adjustment stage.

Size register: Stores the specified recording paper size (code in Table 1).

Magnification register: Stores the magnification ratio.

Interrupt register: A save register that saves the copy conditions being set.

Numerical register: Stores the value corresponding to the operated numeric keypad.

Paper feed tray counter: Indicates the number of the paper feed tray.

rKEYJ flag: Detects the rise of key switch operation.

“Write” flag: Indicates write mode setting.

“Call” flag: Indicates the call mode setting.

"Protect" flag: Indicates protect mode setting.

"Interrupt" flag: Indicates interrupt mode setting.

``Shift'' flag indicates whether there is a carry in the 2-set register.

rxl, 1.5J flag: Magnification ratio 1.15x (115%
) Indicates that there is a specification.

rXo, 82J flag: variable magnification 0.82x (82%)
Indicates that it is specified.

rXo, 711 flag: Indicates that a magnification ratio of 0.71 times (71%) is specified.

"Double-sided" flag indicates two-sided mode setting.

“Back” flag: Indicates the back side copy mode setting.

rADFJ flag: Yes indicates ADF mode setting,
None to indicate 5ADF mode setting.

"Sort" flag: If present indicates sort mode setting, if not indicates stack mode setting.

“Dark” flag: Indicates that the dark key 101 is continuously pressed down.

"Write" flag: Indicates that the light key 102 is continuously pressed down.

"Auto" flag: Indicates automatic density adjustment mode setting.

"Reduction" flag: Indicates that the reduction key 111 is continuously pressed down.

“Enlarge” flag: Indicates that the enlarge key 112 is continuously pressed down.

"Confirmation" flag 2 Indicates that the specified paper is not set on the paper feed tray.

See Figure 5a.

When the power is turned on, SL (1st step: same below)
output port of each microcomputer, RA
Outside the non-volatile memory area of M53, each internal R
Initialize AM etc.

If the protection circuits of each component of the device are scanned in S2 and an abnormality is found (S3), abnormality processing such as setting the corresponding display on the abnormality indicator 1.00 is performed (S4). 33-54-52-...I can't get out of the loop.

In the process of reading the status of each part, in addition to scanning the protection circuit, the size detection sensor 57 and its decoder driver 58 read the detection marks on the paper feed cassettes mounted on the paper feed trays of each stage, and detect whether recording paper is present or not. and create the size table mentioned above,
Then, the display of the paper size display 110 is set.

In S5, the standard mode of the copying device is set.

In this case, set the number of sheets to 1 (set counter ← 1
); Automatic density adjustment mode setting ("Auto" flag set); Density center (density register ← 4); 1st paper feed tray setting (paper feed tray counter ← 1); Variable magnification equal to magnification (variable magnification register ←
100); ADF mode setting (rADFJ flag set); Sort mode setting ("Sort" flag set);
Reset other flags;

In S6, a power relay (not shown) is turned on to supply power to each part, and the presence or absence of an abnormality is checked again in the same manner as in S2. If there is no abnormality (S7, S8), a standby mode is set.

In the standby mode, a loop waits for key operation input on the operation board, returns to 87 every time the loop goes through, and performs processing for reading the status of each part (scanning the protection circuit and reading the paper feed cassettes installed on each paper feed table). (detection mark reading and recording paper presence/absence reading).

In S 1.6, the aforementioned Driver 1 (64) and Buffer! (65) reads the key operation input on the operation board.

See Figure 5c.

When the operation of the write key 7o is read in the input reading in S16, it is detected at 5IOI.

If the rKEYJ flag is present in 5102, another key or write key 7o has already been operated.

Since this indicates that it is continuing, the process returns to S7.

If this flag does not exist, it means that the rising edge of the key operation of the write key 7o is read, and rKEYJ is read in 5103.
Set flag. Therefore, from now on, the write key 70
Even if 8102 is continuously pressed, the next time the process passes through 8102, there is a ``KEYJ'' flag, so the process returns to S7 without performing the following process (key operation reading is canceled).

5104: Check the presence or absence of the write j flag. If this flag is not present, it is an instruction to set the write mode, so 51
In step 05, the presence or absence of the "call" flag is checked, and if the J call mode is being set, it is canceled (step 5106), and in step 5107, the "write" flag is set, and the write indicator lamp 71 is turned on.

In other words, write mode and call mode are not set at the same time.

In step 5104, check whether there is a "write" flag, and if this flag is present, it is an instruction to cancel the write mode, so in step 510
8 to reset the "write" flag and turn on the write indicator lamp 71.
Turn off the light.

At 5109, the program register (which stores the designated number of the program mode) is cleared and the process returns to S7.

When the operation of the call key 72 is read in the input reading at S16, it is detected at S110.

Check the presence or absence of the rKE'ti'J flag with 5111,
If reading the rise of the key operation of the call key 72,
At 5112, the rKEYJ flag is set.

In step S1-13, the presence or absence of the "call" flag is checked, and if this flag is not present, it is an instruction to set the call mode, so
Check the presence or absence of the "write" flag in 5114, and if the write mode is being set, cancel it.5115)-311
At step 6, the "call" flag is set and the call indicator lamp 73 is turned on.

In other words, call mode and write mode are not set at the same time.

Sl 13 checks whether there is a "call" flag, and if this flag is present, it is an instruction to cancel the call mode, so
At step 17, the "call" flag is reset and the call indicator lamp 73 is turned off.

At 5109, the program register is cleared and the process returns to S7.

When the operation of the protect key 74 is read in the input reading in S16, it is detected in 5118.

At step 5119, the presence or absence of the rKEYJ flag is checked, and if the key operation of the prochik l-key 74 has been read, then at step 5120 the rKEYJ flag is set to zero.

At step 5121, the presence or absence of the "protect" flag is checked, and if this flag is not present, the instruction is to set the protect mode, so at step 5122, the "protect" flag is set and the protect display lamp 75 is turned on.

At step 5121, the presence or absence of the "protect" flag is checked, and if this flag is present, it is an instruction to cancel the protection 1 to mode, so at step 5123, the "protect" flag is reset and the protect display lamp 75 is turned off.

At 5109, the program register is cleared and the process returns to S7.

See Figure 5d.

When the operation of the interrupt key 89 is read in the input reading of 81 and 6, it is detected in 5124.

5125 checks whether the rKEYJ flag is present, and if the rising edge of the key operation of interrupt key 89 is read, 5126
to set the rKEY flag.

The presence or absence of the "interrupt" flag is checked in 5127, and if this flag is not present, it is an instruction to set the interrupt mode, so 51
28, set the "interrupt" flag and turn on the interrupt indicator lamp 90.
lights up and saves the copy conditions being set to the interrupt register.

5127 checks whether there is an "interrupt" flag. If this flag is present, it is an instruction to cancel the interrupt mode, so 512
9 to reset the "interrupt" flag and turn on the interrupt display lamp 90.
turns off and calls the copy condition saved in the interrupt register.

After this, the process returns to S7 and enters an input waiting loop.

When the input reading at 816 reads the operation of the numeric keypad 91, it is detected at 5130.

5131 checks whether the rKEYJ flag is present or not, and if it reads the rising edge of a key operation on the numeric keypad 91, 513
2 sets the rKEYJ flag.

At step 5133, the numerical value corresponding to the operated key is stored in the numerical value register.

The presence or absence of the "write" flag, "call" flag, and "protect" flag is checked in 5134, 5135, and 5136. If all of these flags are absent, it is not a program mode but an instruction to set the number of sheets, so 5137 Check to see if the "shift" flag is present.

If there is no "shift" flag, this is the first input for setting the number of sheets to be set.

Check the value of the numerical register at 8138. The number of pieces in the set is 1
Since the value is set between 99 sheets and 99 sheets, it is meaningless even if the value O is inputted first, so it is canceled.

If the value of the numerical register is 1 to 9, a "shift" flag is set in step 5139, and the numerical value of the numerical register is set in the 1 digit of the set register in step 5141, and displayed on the set number display 94.

Next, when the numeric keypad 91 is operated to set the number of sheets to be set, there is a "shift" flag, which changes from 5137 to 5140.
, shift the set register by one high-order digit, and set it to 514.
1 sets the numerical value of the numerical register in the 1's digit of the set register and displays it on the set number display 94.

5134. In 5135 and 5136, check the presence or absence of the write J flag, "call" flag, and "protect" flag, and if any one of these flags exists, it is a number specification in program mode, and 51.42
Check the value of the numeric register at . Since the number designation in the program mode is made with a numerical value from 1 to 5, if the value in the numerical register is not within this range, it is canceled.

If the value of the numerical register is between 1 and 5, the value of the numerical register is set in the program register at step 5143.

At 5144, address data corresponding to the value of the program register (ie, designated number) is read from the address table stored in the nonvolatile memory area of the RAM 53. Here, the address table will be explained.

FIG. 4b shows an example of address data corresponding to number 1 in the address table. The address table consists of five pieces of address data corresponding to numbers 1 to 5, respectively, configured in the same way.

The address data specifies the start address of the area (in the non-volatile memory area of the RAM 53) in which the copy condition is stored in association with number 1 using the LSB to the second bit; the third to fifth bits indicate the number; The 6th bit indicates whether the copy condition associated with that number has been written (1: written, O: not written); MSB indicates the protection of the copy condition written in association with that number. Specified or not specified [
1: Protected (update not possible), O: Updatable (without protection)). ``In the example of Figure 4b.

The copy condition associated with number 1 is the first address E1.
It is written in an area starting with 00 (hexadecimal), indicating that the copy condition is not specified as protect.

Referring again to Figure 5d.

At step 5144, address data corresponding to the value of the program register is read from the address table, and at step 5145, the MSB of the read address data is checked. This is 1
If so, the specified number, that is, the data written in association with the value of the program register (the copy condition is protected (cannot be updated), so
For 8146, the data protection indicator lamp 7 of that number
Turn on 9°81.83.85 or 87 and turn off the other data protection indicator lamps.

If the MSB of the address data read with 5145 is 0, it can be updated without specifying protection), so 5
147, data protection display lamps 79, 81, 8
3. Turn off all lights of 85 and 87.

At 8148, the sixth bit of the read address data is checked. If this is 1, the data (copy condition) has been written in association with the specified number, that is, the value of the program register, so in the 5149, the data write indicator lamp 78, 80, 82 of that number .84 or 86 is lit, and the other data writing indicator lamps are turned off.

The 6th bit of the address data read by 8148 is 0.
If so, 5 data is not written, so 5150
Now, all data write indicator lamps 78, 80, 82, 84 and 86 are turned off.

After this, the process returns to S7.

See FIG. 58.

When the # key 92 is operated during input reading in S16,
5151 to detect.

5152 checks whether the rKEYJ flag is present, and if the rising edge of the # key 92 key operation is read, 5153
Set the rKEYJ flag with .

The value of the program register is checked in step 5154, and if no value is stored there (20), this key operation is canceled because the number has not been specified yet.

When a number is specified and the number is stored in the program register, the address data corresponding to the number is read out from the address data in the RAM 53 in step 5155.

At 8156, the presence or absence of a "write" flag is checked, and if this flag is present, write mode processing is performed.

The following is the write mode processing.

5157 resets the "write" flag and S158a
Then, check the MSB of the read address data.

If the MSB is 1, the data written in association with that number (copy condition) is protected, so the data cannot be updated in write mode. In this case, the program mode is canceled in S158b. Here, if there is a protect mode log, reset it and turn on the indicator lamp (write indicator lamp 71.
Protect indicator lamp 75. Data writing indicator lamp 78
, 80°82.84 or 86. Alternatively, the data protection display lamps 79, 81, 83, 85, or 87 (hereinafter, program mode display lamps) are turned off.

If the MSB is not 1, data (copy conditions) will be written in association with the specified number in the following process, so in step 5159, the sixth bit of the read address data is set to 1.

8160 checks whether the "protect" flag is present or not,
If this flag exists, reset it in 8161 L, s1
．． At step 62, the MSB of the read address data is set to 1. ``If there is no prochiku l-j flag, 51
61 and 5162 are not performed. That is, in the combined mode of write mode and protect mode, data (copy conditions) is written in association with a designated number, and data protection is designated.

In step 8163, each indicator lamp in the program mode is turned off.

In the 8164, the value of the size register; the value of the scaling register; , rXo, 82J flag.

rXo, 71J flag, “double-sided” flag, [ADFJ
Writes the flag and the presence or absence of the "sort" flag.

At 8165, since the content of the address data corresponding to the specified number has been changed, the changed address data is written to the address table. This completes the write mode processing, so the process returns to 87.

The presence or absence of the "write" flag is checked at 815G, and if this flag is not present, the presence or absence of the "call" flag is checked at 5166. If this flag is present, call mode processing is performed. The following is the process in call mode.

At 8167, the "call" flag is reset, and at 8168,
Check the 6th bit of the read address data. If 29 is not 1, no data (copy conditions) has been written in association with that number, so the call mode is meaningless, and the program mode is canceled in S158b.

If the sixth bit of the address data is 1, it means that the data (copy condition) has been written in association with the specified number, so in step 8169, the presence or absence of the "protect" flag is checked. If this flag exists, it is reset in 8170, and in 5171, the 7th flag of the read address data is reset.
Reset the bit to 0 and write the changed address data to the address table.

5170 and 51 without the "protect" flag
71 will not be performed. In other words, in the combined mode of call mode and protect mode, the protection designation of the data (copy condition) written in association with the specified number is canceled.

In step 5172, each indicator lamp in the program mode is turned off.

In 5173, the value of the size register; the value of the scaling register; rxl, 15J flag from the data storage M area (in the non-volatile memory area) of the RAM 53 at the address specified by the read address data.

"x0.82" flag, rXo, 71J flag.

Reads the presence or absence of the "double-sided" flag, rADFJ flag, and "sort" flag, and sets the registers and flags, respectively.

In step 5174, it is checked whether or not the "back" flag is present in the copy condition being set. That is, for example, this corresponds to a case where the call mode is set by interrupt processing while copying the back side in duplex mode.

The “Ura” flag will be present. In that case, this flag is reset at 5175.

In the flow shown in FIG. 5f, copy conditions are set based on the data read in step 5173.

At 5176, the variable magnification is displayed on the variable magnification display 114 based on the value of the variable magnification register.

5177, the display may be different from the one before reading, so double-sided display lamp 97. Front display lamp 98. Back indicator lamp 99. xl, 1.5 indicator lamp 116. X0
．． 82 display lamp 1] 8°Xo, 71 display lamp 120
．． ADF display lamp 122.5 ADF display lamp 123
．． Sort indicator lamp 125 and stack indicator lamp 1
26 and lights out.

At step 8178, the presence or absence of the "double-sided" flag is checked, and if this flag is present, at step 5179, the double-sided display lamp 97 and the front display lamp 98 are turned on.

At S 1.80, check the presence or absence of the rXl, 15J flag. If this flag is present, the Xl, ], 5 display lamp 116 is turned on at 5181.

In 5182, set rxo, 82J flag presence/absence,
If this flag is present, the Xo, 82 display lamp 118 is turned on at S], 83.

At 5184, check whether the rxo, 714 flag is present or not, and if this flag is present, at 5185, the Xo, 71 display lamp 120 is turned on.

At 5186, the presence or absence of the "ADF" flag is checked. If this flag is present, the ADF display lamp 122 is lit at 5188, and if this flag is not present, the 5ADF display lamp 123 is lit at 5187.

At 8189, the presence or absence of the "sort" flag is checked, and if this flag is present, the sort display lamp 125 is lit at 5191, and if this flag is not present, the stack display lamp 126 is lit at 5190.

At 5192, the value of the paper feed table counter is cleared, and at 5193, the paper feed table counter is incremented by one.

The size table in the RAM 53 stores the paper size data based on the detection marks of the paper cassettes attached to each paper feed tray and the reading of whether recording paper is read or not. The corresponding paper size data is read and a value indicating the recording paper size is loaded into the register SIZ.

5195 compares the value of the size register, that is, the recording paper size specified in the call mode, with the value of the register SIZ, and if they are not equal, the paper feed table counter is incremented by one count and the comparison is repeated. . While repeating this comparison, if the value of the size register and the value of register STZ become equal, the recording paper specified in the call mode is loaded into the paper feed tray of the uppermost stage, as indicated by the value of the paper feed tray counter at that time. Since the paper feed cassette to accommodate the paper feed tray is installed, in step 5202, the frame in the column corresponding to the paper feed tray of this stage on the paper size display 110 is lit to display the set paper feed tray ("Confirmation"). ” flag).

Since there are a total of five paper feed trays, if the value of the paper feed tray counter reaches 5 in 5196, this means that the paper feed cassette that accommodates the recording paper specified in the call mode is not installed in this device. At 5197, the paper feed table counter is set to 1.

At step 5198, the "confirmation" flag is set and the confirmation display lamp 77 is turned on.

5199, the display [A3. A4. A5゜B4. B5
or B6 display, and vertical or horizontal display, or
Universal (*) display] lights up.

In step 5202, the frame in the column corresponding to the first stage paper feed tray is lit to indicate that the first stage paper feed tray is set.

In other words, in this case, since this device is not equipped with a paper feed center that accommodates the recording paper specified in the call mode, the recording paper is fed from the paper feed tray 1- attached to the first stage paper feed tray. This may result in copy errors. Therefore, the confirmation indicator lamp 77 lights up, prompting the operator to ``Confirm cassette!'' ! > and displays the designated recording paper size on the designated paper size display 76.

As a result, when the operator attaches a paper feed cassette containing recording paper of the size displayed on the specified paper size display 76 to any paper feed tray and operates the # key 92 again, the 5151 was detected,
This time there is no "call" flag and "protect" flag (already reset), so 5152-3153-3154
-8155-8156-S166-3203-8192
Then, in the same way as above, search the size table to find a paper feed tray to which a paper feed cassette whose size data matches the specified paper size is installed.

When this is detected in 5195, the process advances to 5200, and since there is a "confirmation" flag, this flag is reset in 5201, the confirmation indicator lamp is turned off, and the specified paper size indicator 7
Turn off the display 6.

The above is the call mode processing.

5156-3166-8203-8204--, that is, when there is no "write" flag or "call" flag and there is a "protect" flag, if the # key 92 is operated, the "protect" flag is pressed at 5204. '' flag is reset, and in step 5205, the sixth bin 1- and MSB of the address data read in step 5155 are reset to 0, and this value is stored in the original area of the address table again.

5206, RAM 5 specified by this address data
In step 5207, the data stored in the data storage area (in the non-volatile memory area) of step 3 is cleared, and in step 5207, each display lamp in the program mode is turned off.

In other words, only in the pro-chikme mode, data (copy conditions) stored in association with a designated number are cleared.

Refer to Figure 5e again.

When the C key 93 is operated during input reading in S16,
Detected at 5208.

5209 checks whether the rKEYJ flag is present, and if it reads the rise of the key operation of C key 93, 5210
Set the rKEYJ flag to 1-.

At step 5211, the value of the set register is set to 1 from Sera 1, the "shift" flag indicating the carry of the register to Sera 1 is reset, and the number of sheets set (1 [
]).

See Figure 5g.

If the 5-sided key 96 is operated during input reading in S16, it is detected in step 5212.

5213 checks whether the rKEYJ flag is present, and if it reads the rise of the key operation of the double-sided key 96, 521
4 sets the rKEYJ flag.

5215 to check whether there is a "duplex" flag, and if this flag is not present, it is an instruction to set the duplex mode, so 52
Set the "double-sided" flag in step 16, and turn on the double-sided display lamp 97.
Then, the front display lamp 98 is turned on.

5215 checks whether there is a "duplex" flag, and if this flag is present, it is an instruction to cancel the duplex mode, so 521
7 to reset the "double-sided" flag and double-sided display lamp 97
Then, the front display lamp 98 is turned off.

If you have already finished copying the front side in duplex mode, the back side copy mode is set, so
If there is a "back" flag in 218a, 5218b
After resetting this and turning off the rear display lamp 99, the process returns to S7.

If the dark key 101 is operated during input reading in S16, it is detected in step 5219.

5220 checks whether the rKEYj flag is present or not, and if it reads the rise of the key operation of the dark key 101, 5 is detected.
At step 221, the rKEYJ flag and the "dark" flag for detecting continuous operation (pressing) of the dark key 101 are set. Since this operation of the dark key 101 indicates the operator's intention to perform manual density adjustment, the "auto" flag is reset in step 5222, and the auto display lamp 104 is turned off.

As mentioned above, the manual density adjustment of this copying apparatus has seven stages, and these stages correspond to the values of the density register. That is, the smaller the value of the density register, the darker the stage, and the value 1 represents the darkest first stage density. Therefore, if the value of the density register is 1 in 5224,
Since a darker level cannot be set, the operation of the dark key 101 is canceled.

If the value of the concentration register is not 1, the concentration register is decremented by 1 in 5225, and the display of the manual concentration display 105 corresponding to the value of this concentration register is displayed in 8226, that is, the opening of the manual concentration display 105 is increased by 1. Shift to the left and the light will turn on.

Thereafter, a time delay of dtl (for example, 0.3 seconds) is performed at 5227, and the process returns to 87.

Therefore, if the dark key 101 is continuously operated, it will be detected again at 5219, and this time it will be detected at 5220.
There is a "rKEY" flag, but since the "dark" flag is set, proceed from 5223 to 5224, and if the value of the density register is not 1, set the density one step darker at dt1 time intervals, and set the manual density. Display 105
The mouth opening is shifted one by one to the left and turned on (S225°5226, 5227).

As will be described later, the "dark" flag is set to dark key 10.
It is reset when the operation (pressing down) of step 1 is stopped.

In the input reading of S1.6, if the light key 102 is operated, it is detected at 3228.

Check whether the rKEYj flag is present or not with 5229, and set
~If reading the rising edge of key operation of key 102,
5230 rKEYJ flag and lie 1 hekey 10
2. “Light” to detect continuous operation (press)
Clear the flag. Since this operation of the Rye 1 key 102 indicates the operator's intention to perform manual density adjustment, the "auto" flag is reset in step 5231 and the auto display lamp 104 is turned off.

The values in the density register correspond to the density levels, with the value 7 indicating the seventh level density, which is the lightest. If the value of the density register is 7 in 5233, it is not possible to set a lighter level than that, so the operation of the key 102 to Rye 1 is canceled.

If the value of the concentration register is not 7, the concentration register is incremented by 1 at 5234, and the manual concentration display 105 displays the value corresponding to the value of this concentration register at 8226.
That is, the 0 mark on the manual concentration display 105 is shifted one place to the right and turned on.

Thereafter, a time delay of dtl (for example, 0.3 seconds) is performed at 5227, and the process returns to 37.

Therefore, if the key 102 to RIE 1 is continuously operated, it is detected again at 5228, and this time it is detected at 5222.
9 rKEYJ flag is present, but since the "write" flag is set, proceed from 5232 to 5233, and if the value of the density register is not 7, set the density one step lighter at dt1 time intervals, and manually Concentration display 1
Shift the 0 mark of 05 to the right by t;] and turn it on (S
225.

5226.5227).

As will be described later, the "write" flag is set to the light key 10.
It is reset when the operation (pressing down) of step 2 is stopped.

When the input is read in S16, if the auto key 103 is operated, it is detected in step 5235.

5236 checks whether the rKEYJ flag is present or not, and if it reads the rise of the key operation of the auto key 103, it is 5.
237 sets the rKEYJ flag.

Since the auto key 103 is an alternate switch,
5238 checks whether the "auto" flag is present, and if this flag is not present, it is an instruction to set the automatic density adjustment mode, so the "auto" flag is set in 5239, and the auto 1 flag is set.
Turn on the indicator lamp 104 and display the manual concentration display 1.
Turn off the 05 display.

The presence or absence of the "auto" flag is checked at 5238, and if this flag is present, it is an instruction to cancel the automatic density adjustment mode, so at 5240 the "auto" flag is reset, the auto display lamp 104 is turned off, and the manual Concentration display 1
Turn on the 05 display.

Please refer to Figure 5 t+.

If the paper key 109 is operated during input reading in S1.6, it is detected in step 5241.

5242 checks whether the rKEYJ flag is present or not, and if it reads the rise of the paper key 109 key operation, 5242 is used.
At step 43, the rKEYj flag is set.

There are a total of 5 paper feed trays, and the value of the paper feed tray counter corresponds to this. Therefore, in 5244, check the value of the paper feed tray counter, and if this value is 5, then in 5245, check the value. Clear.

At 8246, the value of the paper feed tray counter is incremented by one, and the outer frame of the column corresponding to the value of the paper feed tray counter on the paper size display 110 is lit to display the set paper feed tray.

In other words, each time the paper key 109 is operated, the value of the paper feed tray counter is incremented by one count, the paper feed tray of the lower level is updated, and the paper feed tray is indicated on the paper size display 110. The outer frame of the column is shifted down by one to 1 and the light is turned on, but the value of the paper feed tray counter is 5, that is, the lowest 5th stage paper feed tray is set, and the outer frame of this column of the display 110 is set. When the frame is lit, the next operation of the paper key 109 returns to the uppermost first stage paper feed tray and sets it, and the outer frame of this column on the 1 display 110 is lit.

Since the copy conditions change by operating the paper key 109,
In step 5247, the size table specified by the value of the paper feed counter is referred to, and a value indicating the recording paper size for which paper feed is to be set is stored in the size register.

At 5248, the presence or absence of the "confirmation" flag is checked. This flag is set in 8198 in the above-mentioned call mode when a paper feed cassette containing recording paper of the size specified by the copy condition called by specifying a number is not installed on any of the paper feed trays. However, paper key 1
How to operate 09.

This means that the operator has finished checking the paper feed power, so in step 5249, this "confirmation" flag is reset, the confirmation display lamp 77 (cassette confirmation!) is turned off, and the specified paper size display 76 is turned off. Turn off the light.

In the input reading in S16, if the reduction key 111 is operated, it is detected in step 5250.

5251 checks whether the rKEYJ flag is present, and if the rising edge of the key operation of the reduction key 111 is read, 52
52 sets the rKEYJ flag.

As mentioned above, this copying device has a linear ratio of 0.5 times (50%
) to 2.0 times (200%), and this scaling ratio corresponds to the value of the scaling register. In other words,
The value in the scaling register is equal to the scaling factor as a percentage. Therefore, if the value of the scaling register is 50, a smaller scaling ratio cannot be set, and in that case, the operation of the reduction key 111 is canceled in step 5254.

If the value of the scaling register is not 50, the scaling register is decremented by 1 in step 5255, and the scaling ratio corresponding to the value of this scaling register is displayed on the scaling ratio display 114.

If there is no "reduction" flag for detecting continuous operation (pressing) of the reduction key 111 in 8256, the reduction key 1
Since this is the first processing for 11 operations, d at 5257
Perform a time delay of tl (e.g. O, 3 seconds) and
Set the "shrink" flag.

5258's standard scaling flag (rXl, 15J).

rXo, 82J, rXo, 71J flag)
The set flag and the corresponding display lamp (Xl, 1)
5 display lamp 116. Turn off the X0.82 indicator lamp 118 or the Xo,71 indicator lamp 120).

If the reduction key 111 is continuously operated, it is detected again at 5250, and this time, r K E at 5251 is detected.
Yes, there is a "Y" flag, but since the "reduction" flag is set, the process proceeds from 5253 to 5254, and if the value of the scaling register is not 50, the scaling register is set to 1 at 5255.
It is decremented, and the scaling factor corresponding to the value of this scaling register is displayed on the scaling factor display 114.

In the next step 3256, since the "reduction" flag is set, the process proceeds to 8259 and a time delay of dt2 (for example, 0.1 seconds) is performed.

That is, when the value of the scaling register exceeds 50 and the reduction key 111 is continuously operated (pressed), the scaling ratio is first updated to a value smaller by 1% at dt1 time intervals, and from then on, The scaling factor is updated to a value smaller by 1% at dt2 time intervals.

When the input is read at 316, if the enlargement key 112 is operated, it is detected at 8260.

5261 checks whether the rKEYJ flag is present, and if it reads the rise of the key operation of the enlarged key 112, 52
At step 62, the rKEYJ flag is set to zero.

The value of the scaling register is equal to the value of the scaling ratio expressed as a percentage, so if the value of the scaling register is 200, it is not possible to set a larger scaling ratio, so in that case, it is enlarged by 3264. Cancels the operation of key 112.

If the value of the scaling register is not 200, the scaling register is incremented by 1 in step 8265, and the scaling ratio corresponding to the value of this scaling register is displayed on the scaling ratio display 114.

If there is no "enlargement" flag for detecting continuous operation (pressing) of the enlargement key 112 in 8266, the enlargement key 1
Since this is the first processing for 12 operations, d at 8267
Perform a time delay of tl (eg 0.3 seconds) and set the "enlarge" flag.

At 8268, the above-mentioned standard magnification change reset is performed, and the process returns to S7.

If the enlargement key 112 is being operated continuously, it is detected again at 8260, and this time, the "KEY" flag of 826] is detected, but since the "enlargement" flag is set, it is changed from 5263 to 5264. If the value of the scaling register is not 200, the scaling register is incremented by 1 at step 8265, and the scaling ratio corresponding to the value of this scaling register is displayed on the scaling ratio display 114.

In the next step 8266, since the "enlargement" flag is set, the process proceeds to 8269, and a time delay of dt2 (for example, 0.1 seconds) is performed.

That is, when the value of the scaling register is less than 200 and the enlargement key 112 is continuously operated (pressed), the scaling ratio is first updated to a 1% larger value at dt1 time intervals, and from then on, The magnification ratio is sequentially updated to a value 1% larger at dt2 time intervals.

Therefore, for example, dtl is 0.3 seconds and dtl is 0.3 seconds.
When the setting is 1 second, when the scaling factor is quickly brought close to the target value, the scaling factor can be set at high speed by continuously operating (pressing) the scaling down key 111 or the expanding key 112. In addition, when making fine adjustments as the target value approaches, the "reduction" flag or "enlargement" flag will be reset when you stop operating the reduction key 111 or enlargement key 112, as will be described later. By repeating the operation within 0.3 seconds, the set value can be changed in 1% increments.

See FIG. 51.

If the same size key 113 is operated during input reading in S16, it is detected in step 5270.

In S271, check whether the rKEYJ flag is present or not, and if the rise of the key operation of the same size key 113 is read, 52
At 72, the rKEYJ flag is set to zero.

At step 5273, the value of the variable magnification register is checked, and if it is 100, the variable magnification has already been set to equal magnification, so this key operation is canceled.

5273, if the value of the scaling register is not 100, 52
At 74, perform the standard magnification reset and set the value 1 to the magnification register.
Store 00.

Thereafter, in step 5294, the value of the scaling register, that is, 100, is displayed on the scaling ratio display 114.

When the input is read in S16, if the Xi, 15 key 115 is operated, it is detected in step 8276.

Check whether the rKEYJ flag is present or not on 5277, xi,
If the rising edge of the key operation of the 15 key 115 is read, the rKEYJ flag is set in 5278.

5279 to rxl, 15J flag presence/absence key,
If this flag is set, the new operation of the Xl, 15 key 115 is canceled since the standard magnification of 1.15x has already been set.

If this flag does not exist, the standard scaling is reset at 8280, the value 115 is stored in the scaling register at 5281, and r
The xl, 15J flag is set and the xi, 15 display lamp 116 is turned on.

Thereafter, in step 5294, the value of the scaling register, that is, 115, is displayed on the scaling ratio display 114.

Upon reading the input at 316, if the Xo and 82 keys 117 are operated, it is detected at 5282.

Check whether rKEYJ flag is present or not on 5283, Xo,
If the rising edge of the key operation of the 82 key 117 is read, the "KEY" flag is set at 5284.

At 5285, the presence or absence of the rXo, 82j flag is checked, and if this flag is present, the new operation of the XO, '82 key 117 is canceled because the standard magnification of 0.82x has already been set.

If this flag does not exist, the standard scaling is reset at 8286, the value 82 is stored in the scaling register at 5287, and rX
o, 82J Set the flag and turn on the x0.82 display lamp 118.

Thereafter, in step 5294, the value of the scaling register, that is, 82, is displayed on the scaling ratio display 114.

When the input is read in S16, if the Xo or 71 keys 119 are operated, it is detected at 8288.

Check whether the rKEYJ flag is present or not using S289.

If the rising edge of the key operation of the Xo, 71 key 119 is read, the rKEYJ flag is set in 5290.

5291 checks whether the rXo, 71J flag is present, and if this flag is present, the new Xo, 71 key 119 operation is canceled because the standard magnification of 0.71x has already been set.

If this flag does not exist, the standard scaling is reset at 5292, the value 71 is stored in the scaling register at 5293, and rX
o, set the 71J flag, Xo, 71 display lamp 1
Turn on 20.

Thereafter, in step 5294, the value of the scaling register, that is, 71, is displayed on the scaling ratio display 114.

In this way, the magnification ratio is set corresponding to the value of the magnification register, so if you press the reduction key 111 to change the magnification ratio set in the standard magnification
Alternatively, fine adjustment can be made using the enlargement key 112.

See Figure 5j.

By reading the input of S16, ADF/5ADF key 121
If there is an operation, it is detected in 5295.

Check whether the rKEYJ flag is present on the 5296, and use ADF/
5If the rising edge of the key operation of the ADF key 121 is read, the rKEYJ flag is set in 5297.

Check the presence or absence of the rADFJ flag with 5298.

If this flag is not present, it is an instruction to set the ADF mode, so set the rADFJ flag in 5299, and set the ADF mode.
Turn on the display lamp 122 and turn on the 5ADF display lamp 12.
Turn off 3.

5298 to check the presence or absence of the rADFJ flag.

If this flag is present, it is an instruction to set the 5ADF mode, so reset the rADFJ flag with 5300, and
Turn off the F display lamp 122 and turn off the 5ADF display lamp 1.
23 is lit.

When reading input at S16, sort/stack key 124
If there is an operation, it is detected in 5301.

Check whether the "KEY" flag is present in 5302 and sort/
If the rising edge of the key operation of the stack key 124 is read, the rKEYJ flag is set in step 5303.

In step 5304, check whether there is a "sort" flag, and if this flag is not present, it is an instruction to set the sort mode, so
At 5305, the "sort" flag is set, the sort display lamp 125 is turned on, and the stack display lamp 126 is turned off.

Check whether the "sort" flag is present in 5304, and if this flag is present, it is an instruction to set the stack mode, so
At 8306, the "sort" flag is reset, the sort display lamp 125 is turned off, and the stack display lamp 126 is turned on.

When all keys on the operation board are not operated, 530
At 7, rKEYJ flag, "dark" plug.

Reset the ``write'' flag, ``enlarge'' flag, and ``shrink'' flag.

5307 and 5308 constitute a loop for controlling the position of the condenser lens 7. In other words, when the target position of the condenser lens 7 corresponding to the value of the variable magnification register does not match the current position of the condenser lens 7, control is required and the condenser lens 7 is driven along the optical axis. The variable power motor (not shown) is energized in forward and reverse directions. If they match, the loop is exited and the variable magnification motor is deenergized at 5310.

Referring again to Figure 5a.

In the above loop for setting copy conditions, the readiness of the copying device is monitored in step 813 for each loop. Here, whether or not the copying apparatus is ready for operation is determined based on the temperature rise of the fixing unit 32 and the presence/absence of recording paper in the paper feed system being set.

If the operation preparation is not completed, proceed to S15.

The "red" lamp provided behind the print key 88 is turned on, and the copy-prohibited indicator lamp 108 is turned on to display ``Please wait.''. At this time, the "green" lamp and the copy permission indicator lamp 107 provided behind the print key 88 are turned on.

When the operation preparation is completed, in S14, press the print key 88.
At the same time, the "green" lamp provided behind the screen is turned on, and the copy-ready display lamp 107 is turned on to display "Ready to copy". At this time, the "red" lamp provided behind the print key 88 and the copy prohibition indicator lamp 108 are turned off.

See Figure 5b.

When the print key 88 is operated during input reading in S16, it is detected in 317. At this time, the copying machine
If it is not ready, this key operation is canceled at 818.

If the copying machine is Ready, the Ready state is reset in S19 in the same manner as above.

At the same time, reset the ``shift'' flag for carry in the set register.

Although not shown in the figure, if the document sensor of the ADF device 2 detects the presence of a document, the operation of the print key 88 becomes an ADF start instruction, and an interrupt process causes the ADF to start.
The document in the F device 2 is loaded and control is executed. When the ADF device 2 completes setting the original at the predetermined position, it returns to this step and starts the copying process described above.

If the end cycle is in progress in S20, the start cycle in S21 is omitted, but otherwise it is executed.

In one copy cycle of S22, copy processing is performed under set copy conditions based on the state of each flag, the value of a register, etc. Each time one copy is completed and one copy cycle of S22 is completed, the number of copies is incremented by one and displayed on the copy number display 95 (S23).

In S24, the same parts status reading process as described above (scanning the copying device's protection circuit, reading and displaying the detection mark of the paper feed cassette attached to each stage paper feed tray and the presence/absence of recording paper) is performed, and the abnormality is detected. If not, S2
6 to driver 1 (64) and buffer 1 (65
) to read keystroke input. here,
When the C key 93 is operated, the value of the set register is set to 828.

(S28) -329-524-... The loop is repeated until the repeat timing.

When the repeat timing comes, the number of copies and the number of set copies (set register) are compared in S30.

When the set number of sheets exceeds the number of copies, the process returns to S22 and one copy cycle is executed again (repeat process).
.

If the number of sheets set becomes one copy or less in S30.

An end cycle is set in S31. Although not shown here, the presence or absence of the "double-sided" flag is checked, and if it is present, the presence or absence of the "back" flag is further checked.

If there is no "back" flag, the "back" flag is set, the number of copies is stored in the set register, and the back side copy mode is set. In back side copy mode, S2
Automatically removes the intermediate tray 36 in one copy cycle of two.
Select.

If the "back" flag is present, it means the end of the back copy mode, that is, the end of the one-sided copy mode, so both the "back" flag and the "double-sided" flag are reset.

When the end cycle is set, the process returns to S7 again to end the paper ejection (5IO), and when the end timing is reached (Sll
), ends the end cycle and de-energizes the main motor, solenoid, etc.

Note that this period completes the aforementioned input reading and corresponding processing loop, so if the print key 88 is operated during this period, the process advances from S20 to 822 and the start cycle is omitted.

By the way, in this embodiment, when a paper feed cassette containing recording paper of the paper size specified in the call mode is not installed in any of the paper feed trays, the first
In this case, it is the paper feed tray that is equipped with the paper feed cassette that accommodates the largest paper size of the currently installed paper feed cassettes.

Alternatively, a paper feed tray equipped with a paper feed cassette that accommodates recording paper of a size larger than the designated paper size and closest to it may be selected.

Although this embodiment has been described with reference to a so-called electrophotographic copying apparatus, the present invention is not limited thereto. For example, in a so-called laser printer that modulates a laser beam with image information, exposes a photoreceptor, and transfers a visible image onto a cut sheet, or in a printer that records directly on a cut sheet. It can be implemented in the same way.

■Effects of the Invention As described above, according to the present invention, the cut sheet size read out from the size storage means in response to an instruction from the instruction means is compared with the cut sheet size detected by the size detection means, A cut sheet storage means that stores cut sheets of a size matching the read cut sheet size is selected.

Mistakes in cut sheet size are prevented.

In addition, since the read cut sheet size is displayed, for example, if there is no cut sheet storage means that can accommodate cut sheets of a size that matches this size, the operator can check the size of the cut sheet specified by the readout. Since the size can be known, an appropriate cut sheet storage means can be prepared.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a schematic configuration of a copying apparatus according to an embodiment of the present invention. FIG. 2 is a block diagram showing a schematic configuration of a control system for the copying apparatus shown in FIG. 1. FIG. 3 is a plan view showing the appearance of the operation board of the copying machine shown in FIG. 1. FIG. 4a is a plan view showing size data, and FIG. 4b is a plan view showing address data. Figure 5a, Figure 5b, Figure 5C, Figure 5d, Figure 58,
Figures 5f, 5g, 5h, 51 and 5j
The figure is a flowchart showing an outline of the control operation of the control system shown in FIG. 1: Contact glass 2: Automatic document feeder/discharge device that also serves as a pressure plate 3: Exposure lamp 7: Condensing lens 4.5, 6, 8: Mirror 9: Photosensitive drum 10: Charger 11: Developing unit 12: Transfer charger 13 : Separation charger 14: Cleaning unit 15. 18, 21, 24, 27: Paper feed cassette (cut sheet storage means) 16. 19, 22, 25, 28, 38: Paper feed roller 17.
20, 23, 26, 29, 39, 40° 41.42, 4
3, 44, 45, 46, 47° 48: Feed roller 30 Ni registration roller 31: M feed belt 32: Fixing unit 33: Switching claw 34: Paper ejection roller 35: Paper ejection tray 36:
Intermediate tray 37: Right alignment roller 50, 62, 63: Microcomputer (readout control means 2 display control means 2 selection control means) 51: Decoder
52: Read-only memory 53: Read/write memory (size storage means) 54: Battery backup circuit 55: Power supply monitoring circuit 56: I/O device 57: Size detection sensor (size detection means) 58: Decoder driver 59: Motor & solenoid driver (Feeding energizing means) 60: Sensor unit 61: Latch circuit 64, 66, 67: Driver (display energizing means) 65: Buffer 70: Write key 71: Write display lamp 72: Call key 73: Call display lamp 74: Protect key 75: Protect indicator lamp 76 2 Specified paper size indicator (display means) 77: Confirmation indicator lamp 78. 80, 82, 84, 86: Data write indicator lamp 79. 81, 83, 85. 87: Data protection display lamp 88 Niblint key 89: Interrupt key 90: Interrupt display lamp 91: Numeric keypad 92: # key 72, 91, 92: (instruction means) 93: C key 94: Set number of sheets display 95: Copy number display Device 96: Double-sided key 97: Double-sided display lamp 98: Front display lamp 99: Back display lamp 100: Abnormality indicator 101: Dark key 102 Light key 103: Auto key 104: Auto display lamp 105: Manual display lamp 106: Paper end Display 107: Copy allowed indicator 108: Copy not allowed indicator 109: Paper key 110: Paper size indicator 1
11: Reduction key 112: Enlargement key 113: Same size key 114: Magnification ratio display 115: Xl, 1
5 key 116: Xl, 15 indicator lamp 117:
Xo, 82 key 11g: Xo, 82 display lamp 119: Xo, 71 key 120: Xo
, 71 display lamp 121: ADF/5 ADF key 122: ADF display lamp 123: 5 ADF display lamp 124: Sort/Stack key 125: Sort display lamp 126: Stack display lamp

Claims (4)

[Claims] (1) A plurality of cut sheet accommodating means, a plurality of feeding means each feeding out a cut sheet from each of the cut sheet accommodating means, a conveying means for conveying the sheet fed out from the feeding means to the recording section, and a sheet sent by the conveying means. In a cut sheet recording device having a recording means for recording an image: size detection means for detecting the cut sheet size accommodated in the cut sheet storage means; size storage means for storing at least one recording cut sheet size; size storage means instruction means for instructing to read out the cut sheet size from the instruction means; readout control means for reading out the cut sheet size stored in the size storage means in response to instructions from the instruction means; display means; display energizing means for energizing the display means. ; display control means for instructing the display energizing means to display the cut sheet size read by the readout control means; comparing the cut sheet size read by the readout control means with the cut sheet size detected by the size detection means; Selection control means for selecting a cut sheet accommodating means that accommodates a cut sheet of a size matching the cut sheet size; and a feeding means corresponding to the cut sheet accommodating means selected by the selection control means in response to a recording instruction signal. A cut sheet recording device comprising: a feed-out biasing means for urging the feed-out. (2) The selection control means compares the cut sheet size read by the readout control means and the cut sheet size detected by the size detection means, and stores cut sheets that match the read cut sheet size. The cut sheet recording apparatus according to claim 1, which selects a predetermined cut sheet storage means when no means is available. (3) The size storage means stores a plurality of cut sheet sizes in association with a number; the designation means is a key switch for designating the number, as described in claim (1) above. cut sheet recording device. (4) The cut sheet recording apparatus according to claim (1), (2), or (3), wherein the size storage means is a readable/writable nonvolatile memory.