JPS6227252A - 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 if no cut sheet storage means containing copying sheets whose size is coincident with the size of cut sheets read-out from a RAM in response to an instruction of a copying condition, such a condition is displayed. CONSTITUTION:When a numbered copying condition is inputted from keys 72, 91, 92, the size of cut sheets is read out from a nonvolatile RAM in accordance with the number of the copying condition. 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.

Additionally, it is equipped with multiple paper feed trays and uses a removable paper feed cassette so that several types of recording paper of different sizes can be loaded at any time.

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 of copying onto recording paper of a different size. ■Purpose of the Invention Cut Sheet 1 - To prevent mistakes in the cut sheet size when recalling and setting a stored operation mode in a recording device. The purpose is to

■Structure of the Invention In order to achieve the above object, the present invention includes a plurality of cut sheet storage means, a plurality of feeding means each feeding cut sheets from the respective cut sheet storage means, and recording of sheets fed out from the feeding means. In a cut sheet recording apparatus having a conveyance means for conveying to a 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 recording device; Size storage means for storing the cut sheet size: Instruction means for instructing reading of the cut sheet size from the size storage means i In response to an instruction from the instruction means, the cut sheet size stored in the size storage means is read out, and the cut sheet size stored in the size storage means is read. Comparison and determination means 7 that compares the cut sheet size and the cut sheet size detected by the size detection means and determines whether or not they match 7 When the comparison and determination means indicates that they match, the cut sheet size is determined selection control means for selecting the cut sheet storage means that has detected; display means; display biasing means for biasing the display means; display control means for instructing the display biasing means to display according to the determination result of the comparison determination means; and 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 in response to the recording instruction signal.

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 obtained. Since the cut sheet storage means that accommodates the cut sheet size is selected, errors in cut sheet size can be prevented.

Additionally, if there is no cut sheet storage means that stores cut sheets of a size that matches the read cut sheet size, this will be displayed, allowing the operator to prepare a suitable cut sheet storage means. can.

Other objects and features of the present invention will become clear from the following description of an embodiment 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.

1 is a contact glass for setting a document, and 2 is an automatic document feed/discharge bag M (hereinafter referred to as an ADF device) which also serves as a pressure plate.

The document set may be set directly on the contact glass 1 with the pressure plate 2 open, or may be set on the document table of the ADF device 2 (on the right side of the ADF device 2 in FIG. 1). In the latter case, when the ADF device 2 detects that there is a document on the document tray, the copy start instruction input becomes an ADF start instruction, and after feeding the document and setting it at a predetermined position on the contact glass 1, the ADF device 2 Device 2 issues a copy start instruction. There are two operating modes of the ADF device 2. The first is manual copy start instruction → feeding of the original on the document placement table → copying → ejection of the original and feeding of the next original →... The second mode is ADF mode, which continues until all the originals on the original table are used up.
Input copy start instruction → Load original on document tray →
This is a 5ADF mode in which the process is copying → document ejection → waiting for input of copy start instruction.

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 of the ADF device 2 with the contact glass 1. It is brought into close contact with the contact glass 1.

An optical scanning system including 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[crn
, /sec] (r: radius of photoreceptor drum 9 [cm, ω
: The rotational angular velocity of the photosensitive drum 9 [rad/5ecl] and the original scanning speed v [cm/5ecl] are set to be equal. In the case of enlarged copying, if the magnification rate is M, the condensing lens 7 moves to the left on the optical axis in FIG. The scanning speed v [cm/sec] is set to /M of the moving speed rω [cm/see] of the surface of the photoreceptor drum 9. In the case of reduced copying, if the reduction ratio is 1/m, the condenser lens 7 moves to the right on the optical axis in FIG. 1 to reduce the projected image on the photosensitive drum 9 to 1/m. Therefore, the document scanning speed V[cm/s ecl is set to m times the moving speed rω[cm/5ecl] of the surface of the photoreceptor drum 9.

Around the photoreceptor drum 9 are a charger 10° and a developing unit 11. Transfer charger 12. Separate 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. A removable paper feed cassette 15, 18, 21°24.27 is attached to each paper feed table.

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 indicating the type (size of paper 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 installed, a light-shielding breaker with a detection mark enters and reads the type of paper feed cassette installed through light transmission/light-shielding (the detection mark is used as a magnet). ,
(Can also be read by turning on/off a magnetically sensitive reed switch). The detection mark codes are shown in Table 1 below.

However, in Table 1, rOJ indicates light transmission (without a light-shielding filler), and "1" indicates light-shielding (with a light-shielding 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 toward the registration rollers 30 by the paper feed rollers 16 and feed rollers 17.
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 feed rollers 20.
When the third stage paper feed tray is selected, the recording paper stored in the paper feed cassette 21 is fed out toward the registration rollers 30 by the paper feed rollers 22 and feed rollers 23.48, and the recording paper is fed to the fourth stage paper feed tray. When is selected, the recording paper stored in the paper feed cassette 24 is fed out toward the registration roller 30 by the paper feed roller 25 and feed rollers 26, 47° 48, and the fifth stage paper feed table is selected. , paper feed roller 28 and feed rollers 29, 45, 46, 47
, 4.8, the recording paper stored in the paper feed cassette 27 is fed out toward the registration roller 30.

The registration roller 30 feeds the recording paper fed out at a predetermined timing to the photosensitive drum 9 (sheet feeding).

A 1wi feed belt 31. is provided downstream of the photoreceptor drum 9. A fixing unit 32 and the like are provided.

The conveyance path of the recording paper after leaving the fixing unit is divided into two ways. One is a paper ejection conveyance path that ejects paper to a paper ejection tray 35 via a paper ejection roller 34 when the switching claw 33 is lowered (shape B in FIG. 1), and the other is a , is a paper re-feed conveyance path that leads to the intermediate tray 36 via feed rollers 39 and 40 in a state in which 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. Save 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, 44, and 48, it is fed out toward the registration rollers 30. Thereafter, the registration roller 30 sends this recording paper to the photosensitive drum 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.

Note that the intermediate tray 36 has a lid that can be opened and closed on the left side in FIG.

From here, you can take out the recording paper that has been copied on the front side.

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, 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 performed. In this case, the cleaning unit 14 is equipped with a conductive brush and a cleaning blade.

Toner, carrier, etc. that have adhered while the apparatus is stopped are wiped off, 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 process, charging of the 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 so that the exposure of the leading edge of the document matches the leading edge erase end position.

The document is irradiated by the exposure lamp 3 and 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
1, negatively charged toner adheres and becomes visible (
Developed: positive image).

Before starting exposure, each paper cassette 15.1.8, 21°2
4.27 or intermediate tray 36 to registration roller 30
The recording paper fed out is stopped once in contact with the registration roller 3o, and is sent out toward the photoreceptor drum 9 at a predetermined timing according to the rotation of the photoreceptor 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 moves the surface of the photoreceptor drum 9 at a moving speed rω [cm/5eal] at a delivery speed Vp [cm/
The recording paper is being sent out using s e cl.

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 photosensitive drum 9 by a separation charger 13 and a separation 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.

Here, for copying in single-sided copy mode (outside double-sided copy mode) or back-side copying in double-sided copy mode, a switching drive solenoid (not shown) for 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 discharged to the paper discharge 1-ray 35 via the paper. When copying on the down 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, and the fixing unit 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 start cycle, and if a copy start instruction is given while the end cycle is being executed, the start cycle is omitted. 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 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).
).

The MCPU 50 centrally controls this control system, and its pass line includes a read-only memory (ROM).
) 52, read/write memory (RAM) 53, ■/○ device 56, S] 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 RAM 53, and 55 is a power supply voltage monitoring circuit. The power supply monitoring circuit 55 receives a reset signal (
L level) and constant voltage Vcc (e.g. +5v)
When the voltage becomes lower than a predetermined voltage (for example, 4.5 V), a reset signal (L level) is generated. This reset signal is M
CPU50゜5ICPU62S2CPU63,53CP
U.

Engineering/○ 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 backup circuit 54, transistors T r 1 and T r 2 are put into a cut-off state. As a result, the constant voltage input terminal (Vcc) of the RAM 53 and the chip select input terminal 6
The voltage of battery BT will be applied to. The voltage of battery BT is set lower than the constant voltage vcc (for example, 3
v) Therefore, writing to and reading from the RAM 53 becomes impossible.

When the power supply voltage is unstable, the power supply voltage monitoring circuit 55 may malfunction, so the battery backup circuit 54
A Zener diode ZD] is inserted into the reset input terminal of the . 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).

When the reset signal becomes H level after a predetermined period of time has passed after the power is turned on or after the constant voltage Vcc is restored, the base current flows to the transistor T r 1 via the Zener diode ZDI, so the T r 1 is turned on. This also turns on the transistor Tr2. therefore,
A constant voltage V is input to the constant voltage input terminal (Vcc) of the RAM53.
cc is applied and an L level is applied below the chip select input terminal σ, so 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
Writing to and reading from the nonvolatile memory area of the RAM 53 is executed based on the R times signal.

Note that the MCPU 50 monitors the voltage of the battery BT of the battery backup circuit 54 using the analog boat ANO, and displays a warning (Fig. 3 Bat) when the voltage falls below a predetermined voltage (for example, +f2.13v).

A size detection sensor 57, its decoder driver 58, a motor and solenoid driver 59, a sensor unit 60, and the like are connected to the I10 device 56.

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

The size detection sensor 57 includes four sets of five photointerrupters for reading the same bits of each paper feed table connected in parallel,
5 for detecting the presence or absence of recording paper on each paper feed tray connected in parallel
It consists of one set of two reflective photosensors. That is, when the decoder driver 58 is set to read the first stage paper feed tray, four photo interrupters for reading each bit are used to detect the detection mark ( (see Table 1), and.

A reflective photo sensor reads the presence or absence of recording paper in the paper feed cassette; if the decoder driver 58 is set to read the second paper feed tray, four photo interrupters for reading each bit read the second paper feed tray. The detection mark on the paper feed cassette mounted on the tier 3 paper feed tray and the presence or absence of recording paper in that paper cassette are read using a reflective photo sensor; The detection mark on the paper cassette and the presence or absence of recording paper.

Reads the detection mark of the paper feed power cent installed on the 4th stage paper feed tray and the presence or absence of recording paper, and the detection mark of the paper feed cassette installed on the 5th stage paper feed tray and the presence or absence of recording paper. . In this reading, for each paper feed tray, the MCPU 50 indicates the size of the recording paper (see Figure 1) using the LSB to 3rd bit, indicates the paper feed tray number using the 4th to 6th bits, and uses the MSB to indicate the recording paper size (see Figure 1). Create 8-bit size data indicating the presence or absence of recording paper and write it in the size table of RA, M53 (normal read/write area). Figure 4a shows the size data of the second paper feed tray in the size table. An example is shown. FIG. 4a It shows that a paper feed cassette for A4 horizontal paper feed is attached to the second stage paper feed 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.
The paper feed clutch solenoid 38, the registration clutch solenoid of the registration roller 30, the switching drive solenoid of the switching pawl 33, etc. are connected, and energization/deenergization control of these is performed in response to instructions from the MC and PU 50.

The sensor unit 60 includes a separation jam sensor, a toner (
Developing unit 11) sensor, drum (photosensitive drum 9)
A temperature sensor, a P sensor, etc. are connected.

5 ICPU62 input port PIO, pH and output port P20. P21 connects to the ADF device 2 via the connector.
It is connected to the control input/output terminal of the sorter (not shown), from which data is communicated serially, and the AD
Executes F2 and sorter control. Input port P
14. The dip switch DIPsw connected to P15+P16 and PI3 is for specifying the type of ADF2 and sorter.

In addition, the input port RXD and output port TXD of 1MCPU50 have 52CPTJ63 and 53C, respectively.
An output port 1-TXD and an input port RXD of a PU (not shown) are connected, and data is transmitted 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 A/N7. Specifically, in Fig. 2, the key switch consisting of a switch contact and a diode is indicated by O, which is connected to the output line of Drino<1 (64) and the buffer 1.
(65) is inserted at the intersection of the input lines of buffer 1 (65), and outputs the H level to the output lines in order by the scan signal as Drino<1 (64)l, so the level of the input line of buffer 1 (65) can be read. The key operations are read by associating them with scan signals.

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
:Reads the serial display data output from the serial output terminal TXD of the PU 50 from the serial input terminal RXD of the 52 CPU 63, and writes it into the display data store area of the internal RAM.

In response to the scan signal output to driver 1 (64), the 82 CPU 63 uses this display data to send signals from output ports PBO to PB7 to driver 2 (66), from output ports PAO to PA, and from output ports PAO to driver 3 (67). A display signal is output 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 the light emitting diode whose display is instructed by the display data is connected. ) becomes H level due to the scan signal, the output line of 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
The MCPU executes the speed control of the second carriage (not shown) on which the second mirror 5 and the third mirror 6 are mounted, and the position control of the condenser lens 7 during zooming.
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 the internal R, Write to the scaling data store area and size data store area of AM.

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, and the photodetector is guided from the optical fiber to the background density detection circuit. (For details, see patent application No. 60-0060.
97). This background density detection circuit output terminal is 53S
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.

Figure 3 shows the appearance of the operation boat operated by the operator. This will be explained with reference to FIG.

70 is a write key. This key is an alternate switch, and the writing mode is repeatedly set and canceled every time the key is operated. In write mode, write indicator lamp 7]
lights up.

72 is a call key. This key is an alternate switch, and the calling mode is repeatedly set and canceled each time the key is operated. In call mode.

, the call indicator lamp 73 lights up.

74 is a protect key. This key is an alternate switch, and the protection mode is repeatedly set and canceled every time the key is operated.In the protect mode, the protect display 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 indicates confirmation of the paper feed cassette when the paper feed cassette that accommodates the recording paper is not mounted on any of the first to fifth paper feed trays.

78 and 79, when number 1 is designated 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 are respectively associated with number 2. 82 and 8; a data write indicator lamp that indicates whether data is written; and a data protect indicator lamp that indicates whether the data is protected;
3 is a data write indicator lamp that indicates whether data is written or not, and a data protect indicator lamp that indicates whether the data is protected; 84 and 85 are respectively associated with number 4. 86 and 87 are data indicating whether or not the data associated with number 5 is written. These are a write indicator lamp and a protect indicator lamp that indicates whether or not the data is protected.

88 is a print key for inputting a copy start instruction (or ADF start instruction). This key 8
8 is a transparent display key switch with a green lamp and a red lamp behind it, and f? -When set to Ready (copy possible), the green lamp lights up and the red lamp goes off), and when Ready reset (copy not possible), the red lamp lights up (green lamp goes off).

89 is an interrupt key. This key is an alternate switch, and interrupt mode is repeatedly set and canceled each time the key is operated. Interrupt display lamp 9 while setting interrupt mode
0 lights up.

91 is a numeric keypad. In the program mode, a number specifying the nonvolatile memory area of the RAM 53 is specified by operating this key (1 to 5 only).

Further, the number of copies set is specified outside the program mode. The number of copies in a set is 1 to 9 copies of the same original.
The number of sheets can be set between nine sheets, and the set number of sheets is displayed on the set 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, the number of copies in the copy set is set to the initial state (1 copy).

96 is a double-sided key. This key is an alternate switch, and each key operation repeatedly sets and cancels the screen 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 duplex display lamp 97 and the front display lamp 98 are turned on, and front copies of the set number of recording sheets are 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. These are key switches used for manual density adjustment. The manual density adjustment of this device has seven levels, and darker levels (lower numerical values) are sequentially set by operating the dark key 101, and lighter levels (higher numerical values) are sequentially set by operating the light key 102.

Reference numeral 105 denotes a manual density display, which indicates the stage of the manual density being set by lighting up low. 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 density adjustment mode is repeatedly set and canceled each time the key is operated.

When automatic density adjustment mode is set, manual density 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.

These are the toner collection indicator and the call service person indicator.

These indicators light up when a corresponding abnormality occurs.

Reference numeral 106 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. When this happens, this indicator lights up.

Bit 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.

107 is a copy permission indicator lamp, and 108 is a copy prohibition indicator lamp. In Ready set (copy possible), the copy ready indicator lamp 107 lights up and the copy not possible indicator lamp 1
08 goes off), and when Ready reset 1- (copy not possible), the copy-not possible 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 tier paper feed tray → the 2nd tier paper feed tray → the 3rd tier paper feed tray → the 4th tier paper feed tray → the 5th tier paper feed tray → the 1st tier paper feed tray. Tier paper feed stand→・
...and update settings.

Reference numeral 110 denotes a paper size indicator, which displays the size of the recording paper in the paper feed cassette installed on the paper feed tray of each stage (
A3. A4. A5. B4. BS or B6 display, vertical or horizontal display, or universal (*) display] lights up. All displays in the column corresponding to the paper feed tray with no paper feed cassette installed will be turned off.

The paper feed 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/J% key, and 112 is an enlargement key. This copying device has a linear ratio of 0.5 to 2.0 (5 in percentage).
Any magnification ratio can be set between 0% and 200%). When the reduction key 111 is operated, the variable magnification is sequentially updated to the /IX smallest value in this range, and when the enlarge key 112 is operated, the variable magnification is sequentially updated and set to a larger value 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 Xl, 15 key, and when this key switch is operated, the magnification ratio is 1.15 times (115% in percentage)
is set, 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.

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

Reference numeral 114 is a magnification ratio display that displays the magnification ratio being set as a percentage.

121 is an ADF/5ADF key. This key is an alternate switch, and the ADF mode and 5ADF mode are set alternately each time the key is operated. ADF display lamp 122 or 5 corresponding to the mode being set respectively
The ADF display lamp 123 lights up.

124 is a sort/stack key. This key is an alternate switch, and the sort mode and stack mode are set alternately with each key operation. In the sort mode, the sort indicator lamp 125 lights up,
Copies are automatically collated by a sorter (not shown).

In addition, in the stack mode, the stack display lamp 126
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 5dS, 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 number of two sets.

Density register: Stores the density 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 paper feed tray number.

rKEYJ flag: Detects the rise of key switch operation.

rWrite” 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, 15J flag: Magnification ratio 1.15x (115%)
Indicates that it is specified.

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

rXo, 71J flag: Indicates that magnification ratio 0.71x (71%) is specified.

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

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

rADFJ flag: If present indicates ADF mode setting, if absent indicates 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.

"O1~" flag: Indicates automatic density adjustment mode setting.

“Reduction J 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: Indicates that the specified paper is not set on the paper feed tray.

See Figure 5a.

When the power is turned on, SL (same as 1st step 2 and below)
and each microcomputer's output port, RA
Outside the non-volatile memory area of M53, each internal RAM
Initialize etc.

In S2, the protection circuits of the various parts of the device are scanned and if an abnormality is found (S3), abnormality processing such as setting the corresponding display on the abnormality indicator 100 is performed (S4).52-83- until the abnormality is removed. 84-32-...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 installed on the paper feed trays of each stage, and detect whether there is recording paper or not. Read 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) Image density center (density register ← 4): 1st stage paper feed tray setting (paper feed tray counter ← l);
100): ADF mode setting (rADFJ flag set); sort mode setting ("sort" flag set); other flags reset;

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 standby mode, a key operation loop on the operation board is configured, returning to 87 after each round of the loop, and reading the status of each part (scanning the protection circuit and checking the paper feed cassette installed on each paper feed table). (detection mark reading and recording paper presence/absence reading).

S], 6 reads the key operation input on the operation board by the driver 1 (64) and buffer 1 (65) described above.

See Figure 5c.

When the operation of the write key 70 is read in the input reading in S16, it is detected in 5101.

If the rKEYj flag is present in step 5102, this indicates that another key or write key 70 has already been operated and is continuing, so 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 70 has been read, and the rKEYJ flag is set in step 5103. Therefore, even if the write key 70 is continuously pressed from now on.

Since the rKEYJ flag is present when passing through 8102 next time, the process returns to S7 without performing the following processing (key operation reading is canceled).

The presence or absence of the "write" flag is checked in 5104, and if this flag is not present, it is an instruction to set the write mode, so 51
Check the presence or absence of the "call" flag in step 05, and if the call mode is set, cancel it (step 5106), set the "write" flag in step 5107, and turn on the write indicator lamp 71. Input mode and call mode cannot be set at the same time.

At step 5104, the presence or absence of the "write" flag is checked, and if this flag is present, it is an instruction to cancel the write mode, so step 810
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 in S16, it is detected in 5110.

5111 checks whether the rKEYJ flag is present, and if the rising edge of the key operation of the call key 72 is read, 5112
Set the rKEYJ flag with .

5113 checks whether there is a "call" flag, and if this flag is not present, it is an instruction to set the call mode, so 51
In step 14, the presence or absence of the "write" flag is checked, and if the write mode is being set, it is canceled (5115), and in step 5116, 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.

5113 checks whether the "call" flag is present, and if this flag is present, it is an instruction to cancel the call mode, so 511
7 to reset the "call" flag and turn on the call indicator lamp 73.
Turn off the light.

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.

5119 to check whether the rKEYJ flag is present or not, and if the rising edge of the key operation of the protect key 74 is read,
At 5120, the rKEYJ flag is set.

5L21 checks whether there is a "protect" flag, and if this flag is not present, it is an instruction to set the protect mode, so set the "protect" flag in 5122,
Prochik 1 - Turn on the display lamp 75.

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 protect 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 in S16, it is detected in 5124.

5125 checks whether the rKEYJ flag is present, and if the rising edge of the interrupt key 89 key operation is read, 512
6 sets the rKEYJ 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, and 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 operation of the numeric keypad 91 is read in the input reading in S16, it is detected in 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 5138. The number of pieces in the set is 1
Since the value is set between ~99 sheets, it is meaningless even if a value of 0 is input at the beginning, and the value 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, the value in the numerical register is displayed in the 1's digit of the set register on the set number display 94.

5L34.5135 and 5136 check the presence or absence of the "write" flag, "call" flag, and "protect" flag, and if any one of these flags is present, it means that the number is specified in program mode, and the numerical value register is specified in 5142. Find out the value of . 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, 0: not written); MSB indicates the protection of the copy condition written in association with that number. Specified or not specified [
1: Protected (cannot be updated), 0: Can be updated without protection. In the example of Figure 4b, number 1
The copy condition is set to start address E100 (
It is written in an area starting with (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.

At 5145, the MSB of the read address data is checked. If this is 1, the specified number, i.e.
Data written in association with program register values (copy conditions) is specified as protect (cannot be updated)
Therefore, in 8146, the data protection display lamp 79°81.83.85 or 87 of that number is lit, and the other data protection display lamps are turned off.

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 step 5148, 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 in 5148 is O.
If so, there is no data writing, 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 Figure 5e.

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 (=0), 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 step 8156, check whether there is a write J flag, and if this flag is present, perform write mode processing.

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" flag, it is reset and one 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, 8161 resets it and 51
At step 62, the MSB of the read address data is set to 1. If there is no "protect" flag, steps 5161 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.

5164, in the data storage area of the RAM 53 (in the non-volatile memory area), at the address specified by the read address data, the value of the size register; 15” flag, rXo, 82J flag.

rxo, 7] Write the presence or absence of the J flag, "Double-sided" flag, rADFJ flag, and "Sort" flag. In 5165, the content of the address data corresponding to the specified number has been changed, so the address data after the change is is written to the address table. This completes the write mode processing, so the process returns to 87.

At 8156, the presence or absence of the "write" flag is checked. If this flag is not present, the presence or absence of the "call" flag is checked at 8166. If this flag is present, the 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 this is not 1, data (
Since no copy conditions (copy conditions) have been written, 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. ・If there is no "protect" flag, 5170 and 51
71 will not be performed. That is, in the combined mode of call mode and protect mode, protection designation of data (copy conditions) written in association with a designated number is canceled.

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

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

rxo, 82J flag, rXo, 71J flag.

Reads the presence or absence of the "double-sided" flag, rADl 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, and the "back" flag is activated. 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 8176, 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, 15 indicator lamp 116. X0.
82 display lamp 118T x 0.71 display lamp 120.
ADF indicator lamp 122.5 ADF indicator lamp 123.
Sort indicator lamp 125 and stack indicator lamp 12
Turn off all 6 lights.

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 8180, the presence or absence of the rXl, 15J flag is checked, and if this flag is present, the xi, 15 display lamp 116 is turned on at 5181.

At step 5182, the presence or absence of the rxo, 82J flag is checked, and if this flag is present, at step 5183, the Xo, 82 display lamp 118 is turned on.

In 8184, check the presence or absence of rXo and 71J flags,
If this flag is present, the xo, 7L display lamp 120 is turned on in step 5185.

8186 checks whether the rADFJ flag is present, and if this flag is present, 5188 turns on the ADF display lamp 122.
If this flag is not present, 5ADF is set to 5187.
The display lamp 123 is turned on.

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.The paper feed tray counter is set at 5192. The value of is cleared and the paper feed table counter is incremented by 1 at 5193.

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 becomes equal to the value of register SIZ, the recording paper specified in the call mode is stored in the paper feed tray of the stage indicated by the value of the paper feed tray counter at that time. Since the paper feed cassette is installed, the paper size display 110 is displayed in step 5202.

The frame in the column corresponding to the paper feed tray of this stage is lit to display the set paper feed tray (no "confirmation" flag).

Since there are a total of five paper feed trays, if the value of the paper feed tray counter reaches 5 in 8196, 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 tray 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, the paper feed cassette that stores the recording paper specified in the call mode is not installed in this device, so the recording paper is fed from the paper cassette installed in 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 paper cassette 316 reads detected in 5151,
This time there is no "call" flag and "protect" flag (reset), so 5152-31.53-315
4-8192, the size table is searched in the same manner as above, and a paper feed table to which a paper feed cassette whose size data matches the specified paper size is to be installed is searched.

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-S166-8203-S204-... In other words, if the # key 92 is operated when there is no "write" flag or "call" flag and there is a "protect" flag, then "protect" is selected at 5204. The flag is reset, and in step 5205, the sixth bit and MSB of the address data read out in step 5155 are reset to 0 and stored again in the original area of the address table.

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 protect mode, data (copy conditions) stored in association with a designated number are cleared.

Refer to FIG. 58 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 the rise of the key operation of C key 93 is read, 5210
Set the rKEYJ flag with ◎ In 5211, set the value of the set register to 1, reset the "shift" flag indicating the carry of the set register, and display the set number of sheets (1 [sheet]) on the set number display 94. Display.

See Figure 5g.

When the input is read in S16, if the double-sided key 96 is operated, it is detected in step 5212.

Check whether the rKEYJ flag is present in 5213, and if the rising edge of the key operation of the double-sided key 96 is read, 5214
Set the rKEYJ flag with .

5215 checks whether there is a "duplex" flag, and if this flag is not present, it is an instruction to set 1 duplex mode, so 82
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 back 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, and if the rise of the key operation of dark key 101 is read, 52
At step 21, the rKEYJ flag and the "dark" flag for detecting continuous operation (pressing) of the dark key 101 are set. Since the operation of this 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. There are 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 in the concentration register is not 1, the concentration register is decremented by 1 in 5225, and in 5226, the manual concentration display 105 displays the value corresponding to this concentration register value, that is, the 0 mark on the manual concentration display 105 is changed by one. Shift to the left and 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.
The rKEYJ flag is set, but since the "dark" flag is set, proceed from 5223 to 5224,
If the value of the density register is not 1, the density is set one step higher in sequence at dt1 time intervals, and the manual density display 10 is set.
Shift the 0 mark of 5 one by one to the left and turn it 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.

When the input is read in S16, if the light key 102 is operated, it is detected in step 5228.

5229 checks whether the rKEYJ flag is present, and if the rising edge of the key operation of the light key 102 is read, 52
At 30, the rKEYJ flag and the "write" flag for detecting continuous operation (pressing) of the write key 102 are set. Since this operation of the light 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 step 5233, it is not possible to set a lighter level than that, so the operation of the light key 102 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 87.

Therefore, if the light key 102 is continuously operated, it is detected again at 5228, and this time it is detected at 5229.
The rKEYJ flag will be present.

Since the "write" flag is set, proceed from 5232 to 5233, and if the value of the density register is not 7, d
The density is successively set one step lighter at tj time intervals, and the 0 mark on the manual density display 105 is shifted to the right one by one and turned on (S225°8226.5227).

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.

Upon reading the input at 316, if the -auto key 103 is operated, it is detected at 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,
The presence or absence of the "auto" flag is checked at 5238. If this flag is not present, the instruction is to set the automatic density adjustment mode, so the "auto" flag is set at 5239, the auto display lamp 104 is lit, and the manual density display is started. vessel 10
Turn off the display of 5.

The presence or absence of the "auto" flag is checked at 8238, and if this flag is present, it is an instruction to cancel the automatic density adjustment mode, so the "auto" flag is turned off at 5240, the auto display lamp 104 is turned off, and the manual Concentration display 10
Turn on the display No. 5. Refer to Figure 5h.

If the paper key 109 is operated by reading the input at 516, it is detected at 5241.

5242 is used to check the presence or absence of the rKEYJ flag, and if the rising edge of the paper key 109 key operation is read, 524 is
3 sets the "KEY" flag.

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.

That is, each time the paper key 109 is operated, the value of the paper feed tray counter is incremented by 1, the paper feed tray of the next lower level is updated, and the column indicating the paper feed tray of the paper size display 110 is updated. The outer frame is shifted down by one position and turned on, but the value of the paper feed tray counter is 5, that is, 1, the lowest 5th stage paper feed tray is set, and the outer frame of this column on the display 110 is lit. Then, in the next operation of the paper key 109, the setting returns to the uppermost first stage paper feed tray, and the outer frame of this column on the display 110 lights up.

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
The operation in 09 means that the operator has finished checking the paper cassette, so in 5249, this "confirmation"
The flag is reset, the confirmation display lamp 77 (cassette confirmation!) is turned off, and the display on the designated paper size display 76 is turned off.

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

In S251, check whether the rKEYJ flag is present or not, and if the rising edge of the key operation of the reduction key 111 is read, it is 32.
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 this case, the operation of the reduction key 111 is canceled in step S254.

The value of the scaling register must be 50! At f, 5255, the scaling register is decremented by 1, 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
A time delay of tl (for example, 0.3 seconds) is performed and the F compression/JI J flag is set.

5258, the standard scaling flag (rxl, 15J) is reset when standard scaling (described next) is set before the reduction key 111 is operated.

rXo, 82J, rXO, 71J flags) and check the set flags and corresponding display lamps (xl, 15
Indicator lamp 1 t6. xo, 82 display lamp 118 or Xo, 71 display lamp 120) is turned off.

If the reduction key 111 is being operated continuously, it is detected again at 5250, and this time the rKEYJ flag at 5251 is found, but since the "reduction" flag is set, the process proceeds from 5253 to 5254. If the value of the scaling register is not 50, the scaling register is decremented by 1 in 5255, and the scaling ratio corresponding to the value of this scaling register is
It is displayed on the variable magnification display 114.

The next 8256 sets the "shrink" flag 6 (
7), the process advances to 8259 and a time delay of dtl (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 816, if the enlargement key 112 is operated, it is detected at 3260.

5261 checks whether the rKEYJ flag is present, and if it reads the rise of the key operation of the enlarged key 112, 52
Set the rKEYJ flag at 62.6 The value of the scaling register is equal to the value showing the scaling ratio as a percentage, so if the value of the scaling register is 200, a larger scaling ratio cannot be set. Therefore, in that case, the operation of the enlarge key 112 is canceled in step 5264.

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 expansion key 112 is continuously operated, it is detected again at 8260, and this time rKEYJ at +5261 is detected.
The flag is set, but since the "enlarge" flag is set, the process proceeds from 5263 to 5264, and if the value of the scaling register is not 200, the scaling register is incremented by 1 at 8265, and the value of this scaling register is The scaling factor corresponding to the value is displayed on the scaling factor display 114.

In the next step 8266, since the "enlargement" flag is set, the process proceeds to 8269, and a time delay of dtl (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 initially updated to a value 1% larger 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 dt2 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.

When reading the input at 316, if the same size key 113 is operated, it is detected at 5270.

Check whether the rKEYJ flag is present or not with 5271, and if the rise of the key operation of the same size key 113 is read, 527
2 sets the rKEYJ flag.

In S27'3, 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.

Upon reading the input at 816, if the Xi, 15 key 115 is operated, it is detected at 8276.

5277, check whether the rKEYJ flag is present or not, xi, 1
If you want to read the rise of key operation of 5 key 115,
5278 sets the rKEYJ flag.

Check the presence or absence of the rxl, 15J flag on 5279,
Since this flag has already set the standard magnification of 1.15 times, the new operation of the xi and is keys 115 is canceled.

If this flag does not exist, the standard scaling is reset at 5280, the value 115 is stored in the scaling register at 5281, and r
The Xl, 15J flag is set and the Xl, 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.

816 input reading method, xo, 82 If the key 117 is operated, it is detected in 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 rKEYJ flag is set in 5284.

Check the presence or absence of rxo and 82J flags on 5285,
If this flag is present, the standard magnification of 0.82x has already been set, so the new operation of the Xo and 82 keys 117 is canceled.

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
Set the o, 82J flag and turn on the Xo, 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.

If the Xo and 71 keys 119 are operated during input reading in S16, it is detected in step 5288.

Check whether rKEYJ flag is present or not on 5289, xo,
If the rising edge of the key operation of the 71 key 119 is read, the rKEYJ flag is set in 5290.

5291, the presence or absence of the "rxo, 71" flag is checked, 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, 711 flag, Xo, 71 indicator lamp 1
20 is lit.

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

The presence or absence of the rADFJ flag is checked at 5298, and if this flag is not present, this is an instruction to set the ADF mode, so the rADFJ flag is set at 5299, the ADF display lamp 122 is turned on, and the 5ADF display lamp 123 is turned off.

The presence or absence of the rADFJ flag is checked at 5298, and if this flag is present, it is an instruction to set the 5ADF mode, so the rADFJ flag is reset at 5300, the ADF display lamp 122 is turned off, and the 5ADF display lamp 123 is set.
lights up.

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

In step S302, the presence or absence of the rKEYJ flag is checked, and if the rising edge of the key operation of the sort/stack key 124 is read, the rKEYJ flag is set in step S303.

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 step 5305, the "sort" flag is set, the sort indicator lamp 125 is turned on, and the stack indicator 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
7 is rKEYJ flag, "dark" flag.

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 preparation for operation is not completed, in S15, the "red" lamp provided behind the print key 88 is turned on, the copy prohibition indicator lamp 108 is turned on, and <Please wait> is displayed. At this time, the "green" lamp and copy permission indicator lamp 107 provided behind the print key 88 are turned off.

When the operation preparation is completed, in S14, the "green" lamp provided behind the print key 88 is turned on, and the copy permission indicator lamp 107 is turned on to display <Copy possible>. 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 318.

If the copying device is Ready, then in S19 the Ready status is reset in the same way as above, and the "shift" flag for carry in the set register is also reset.

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 one 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
At step 6, key operation input is read by driver 1 (64) and buffer 1 (65). Here, when the C key 93 is operated, the value of the set register is set to 1 in S28.

529-S24-325-S26-327-(S28)
-329-524-... The loop is repeated until the repeat timing.

At the repeat timing, the number of copies is compared with the number of copies set (set register) in S30, and if the number of copies 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 in S30 is less than the number of copies, S31
Set the end cycle with . Although not shown here, the presence or absence of the "screen" flag is checked, and if it is present, the presence or absence of the "back" flag is also 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 side copy mode, that is, the end of the duplex copy mode, so reset both the "back" flag and the "duplex" flag.・Set the end cycle・S7 again Return to 5IO to finish ejecting the paper, and when the end timing comes (Sll
), ends the end cycle and de-energizes the main motor, solenoid, etc.

During this time, the above-mentioned input reading and corresponding processing loop is configured, so if the print key 88 is operated during this time, 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
The paper feed tray is selected, but in this case, the paper feed tray with the paper feed cassette that accommodates the largest paper size of the paper feed cassettes currently installed, or , a paper feed tray equipped with a paper feed cassette that accommodates recording paper of a size larger than and closest to the designated paper size 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 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, Since a cut sheet accommodating means that accommodates a cut sheet of a size that matches the cut sheet size is selected, errors in the cut sheet size are prevented.

Additionally, if there is no cut sheet storage means that stores cut sheets of a size that matches the read cut sheet size, this will be displayed, allowing the operator to prepare a suitable cut sheet storage means. can·

[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 5e,
Figures 5f, 5g, 5h, 51 and 5j
The figure is a flow chart showing an outline of the control operation of the control system shown in FIG. : Mirror 9: Photosensitive drum 10: Charging 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: Conveyance belt 32: Fixing unit 33 Two switching claws 34: Paper ejection roller 35: Paper ejection tray 36:
Intermediate tray 37: Right-aligning roller 50, 62, 63: Microcomputer (comparison/judgment means 2 selection control means 9 display control means) 51: Decoder
52: Read-only memory 53: Read/write memory (size storage means) 54: Battery backup circuit 552 Power supply monitoring circuit 56: I10 deno (chair 57: Size detection sensor (size detection means) 58: Decoder driver 59: Motor and 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 I indicator lamp 76 2 Specified paper size indicator 77: Confirmation indicator lamp (display means) 78. 80, 82, 84, 86: Data write indicator lamp 79. 81, 83, 85, 87: Data protection display lamp 88 Print key 89: Interrupt key 90: Interrupt display lamp 91: Numeric keypad 92: # key 72.91, 92: (instruction means) 93: C key 94: Set number display 95: Copy 1 Number of sheets display 96: Double-sided key 97: Double-sided display lamp 98: Front display lamp 99: Back display lamp 100: Abnormality indicator 101: Dark key 102
Nilight key 103: Auto key 104: Auto indicator lamp 105: Manual indicator lamp 106: Paper end indicator 107: Copy possible indicator lamp 108: Copy not possible indicator lamp 109: Paper key 11O: 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 118: Xo, 82 display lamp 119: Xo, 71 key 120: Xo
, 71 display lamp 121: AD F/S AD F
Key 122: ADF display lamp 123': S A D F 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 Instructing means for instructing to read out the cut sheet size from the instructing means; In response to the instruction from the instructing means, the cut sheet size stored in the size storage means is read out, and the read cut sheet size and the cut sheet size detected by the size detection means are combined. Comparison and determination means for comparing and determining whether the two match; selection control means for selecting the cut sheet storage means whose cut sheet size has been detected when the comparison and determination means indicates that they match; display means; display energizing means for energizing the display means; display control means for instructing the display energizing means to display according to the determination result of the comparison and determination means; and selection control means for activating the display in response to the recording instruction signal. A cut sheet recording device comprising: a feed-out biasing device for feeding and biasing a feed-out device corresponding to a selected cut-sheet storage device. (2) The cut sheet recording apparatus according to claim 1, wherein the selection control means selects a predetermined cut sheet storage means when the comparison determination means indicates no. (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.