JPH0619611B2 - Copying device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a copying apparatus including an automatic document feeder.

2. Description of the Related Art Generally, in a copying machine of a type in which an original is placed on a transparent original placing table and the image is projected / exposed on a photoconductor to form an image, a sheet-like original is used for simplification of copying work. An automatic document feeder (hereinafter abbreviated as ADF) that automatically conveys a document to a predetermined position on the transparent document table can be mounted, and a document is conveyed to this predetermined position and is copied by a signal stopped. What is controlled to have a predetermined relationship with the ADF is provided to initiate the operation.

When using ADF in this type of copier,
The ADF document feeding operation is started by operating the start key provided on the DF side, and the operation of the copying machine is automatically started after the document is stopped at a predetermined position. However, there are some users who are accustomed to making copies without using the ADF. There is an inconvenience that the print key is operated and the copy operation is started without the document set in the fixed position.

Aim The present invention was made by paying attention to such a point.
An object of the present invention is to provide a copying apparatus capable of starting a copying operation using F and a copying operation not using ADF with a common print key.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the copying machine of the present invention is roughly composed of a copying machine main body (100) and an automatic document feeder (200).

A photoconductor drum (1) is rotatably supported in the counterclockwise direction in the figure in the center of the body of the copying machine (100), and an eraser lamp (2) and a charger (3) are provided around the photoconductor drum (1). , Image edge and inter-image eraser (4), developing device (6), transfer charger
(7), a separation charger (8), a cleaning device (9), etc. are sequentially arranged. The photoconductor drum (1) is provided with a photoconductor layer on the surface, and the photoconductor is the eraser lamp.
It is uniformly charged by passing through (2) and the charger (3), and is subjected to image exposure from the scanning optical system (10) through the slit portion (5) to form an electrostatic latent image on its surface.

The optical system (10) is installed below the original glass (16) so that the original image can be scanned, and includes a light source (17) and movable mirrors (11), (12),
It is composed of (13), a lens (14) and a mirror (15). The light source (17) and the movable mirror (11) are photosensitive drums.
The movable mirror moves integrally to the left at a speed of (v / m) (however, m: copy magnification) with respect to the peripheral speed (v) of (1) (constant regardless of equal magnification or variable magnification). (12) and (13) are driven to move integrally to the left at a speed of (v / 2m).

The copy paper is stored in the copying machine (100) by an automatic paper feeding mechanism (20) having two upper and lower cassette mounting portions provided on the left side of the figure or a manual paper feeding mechanism (30) provided above the cassette. Is fed to the transfer section in synchronism with the image formed on the photosensitive drum (1) after being temporarily stopped by the timing roller (21), and the toner image is transferred by the transfer charger (7). It is separated from the surface of the photoconductor drum (1) by the receiving and separating charger (8), sent to the fixing device (23) by the conveying belt (22), and the image is fixed and discharged to the tray (24).

After the transfer, the photoconductor drum (1) is cleaned of the toner and charges remaining on its surface by the cleaning device (9), the eraser (2) and the like, and is prepared for the next copying process.

In the case of automatic paper feeding, the image forming system including the photoconductor drum (1) is started by operating the print key (PSW) (see FIG. 4) for starting the copying operation of the copier (100), and the photoconductor drum ( When the pre-driving process for 1) is completed,
The scanning optical system is driven by the scanning start signal output when the sheet feeding roller (25) or (26) is driven and the copy sheet is conveyed.
The driving of (10) is started, and the copy paper is fed in synchronization with the image forming operation. Two or three copy sheets are used as paper feed rollers (2
It is pushed out by the rotation of 5) and (26), and it is the next-stage handling mechanism.
By (27), (27 '), only the uppermost one is the intermediate roller (28),
It is sent to (28 '). Intermediate rollers (28), (28 ')
Is associated with the next-stage timing roller (21) and its drive is controlled.

The copying machine (100) is further provided with an automatic document feeder (hereinafter referred to as AD
Write F. ) (The 200 can be mounted and the copying operations can be performed in conjunction with each other. The switch (SW ₁ ) indicates that the ADF (200) is electrically connected to the main body of the copying machine (100) and is installed at a predetermined position. ), The control of the ADF (200) and the control of the copying machine (100) are associated with each other, and the operation mode of the copying machine (100) is switched to the ADF mode, that is, the original is placed on the tray (203). When the copy start key (SSW) provided on the ADF (200) is operated while the sensor (SE3) detects that the copy is set, the copy machine (100) keeps the ADF ( 200) starts operating, and the original placed on the original tray (203) is fed along the upper surface of the original placing glass of the copying machine (100) and stopped at a predetermined position, and the copying machine is started from the ADF (200). (100)
When the final scanning movement for the original is completed, an operation signal is output from the copying machine (100) to the ADF (200) to start the copying operation.
The DF (200) discharges the document onto the discharge tray (204). At this time, if the next original is on the original tray (203), the next original is conveyed to a predetermined position as well as discharged.

The ADF (200) is generally inserted between the document feed section (A unit) (201) that stocks and feeds one document and the top of the document platen glass, and conveys the document. The DF unit (20) consists of a document feeder (DF unit) (202) that stops the document on the glass surface at a predetermined position and sends the documents on the glass surface to the discharge tray (204).
2) can also be used as a document feeder by manual feeding. Further, the DF unit (202) can be opened and closed with respect to the main body of the copying machine (100) so as to expose the original placing glass while being mounted on the upper surface of the copying machine (100), and similar to a normal original cover. You can also use it. This opening / closing is detected by the detection switch (SW ₁ ).

The ADF (200) further has an operation unit and a sensor as shown in FIG. FIG. 2 is a plan view of the ADF (200). The operation section (250) is provided on the upper surface of the DF unit (202), and the mode setting key (251) and the mode display lamps (252), (2
53) and (254). Mode display lamp (252), (253), (25
4) is sequentially turned on each time the mode setting key (251) is operated, and the control mode is changed to "automatic paper selection",
It can be switched between "automatic magnification selection" and "manual".

Near the document insertion opening of the DF unit (202), the document length sensor (SE ₁ ) is positioned so that the document can be detected regardless of the size or orientation of the document to be inserted. Document width sensor that takes two states, non-detection
(SE ₂ ) are provided, and the size and orientation of the document are identified by signals from these two sensors.

In the copying mechanism described above, the copying machine (100) includes an operation and control device as described below, and performs control according to the states of various sensors and input switches.

FIG. 3 shows the layout of the operation keys on the operation panel of the copying machine. The operation panel (50) has a print key (PSW) for starting the copying operation, a numerical display device (52) capable of displaying four-digit numerical values, "1", "2" ... "9", respectively.
・ Numeric keys (61) to (70) corresponding to the numerical value for “0”, interrupt key (80) for specifying interrupt copying, clear stop key (8
1), a paper selection key (82) for designating copy papers mounted in multiple stages according to size, and up and down keys (8) for changing / designating copy image density stepwise.
3), (84), and key groups (85) to (93) related to the copy magnification setting device
Etc. are arranged. In addition, a normally open type open / close switch corresponds to each key in terms of a circuit, and the switch is indicated by a number or a symbol attached to each key in a circuit diagram described later.

Switches corresponding to each of these input keys and a copying machine (100)
Various sensors provided on the ADF (200) and the ADF (200) are associated with a control mechanism (400) including a microcomputer system, as shown in FIGS.

4 and 5 show the relationship between the microprocessors (hereinafter simply referred to as CPU) (401) to (403) in the control mechanism (400) and their input / output relationships. (401) is a main body CPU that plays a central role in control, and its serial out terminal (Sout) is connected to the serial in terminal (Sin) of each slave CPU (402), (403) and the main body CPU (Sout). The serial-in terminal (Sin) of 401) is the serial-out terminal (Sout) of slave CPUs (402) and (403), and the interrupt request terminal (INTreq) is the interrupt terminal (INT) and clock output terminal (INT) of each slave CPU. C
LKout) is the clock input terminal (CLKin) of each slave CPU
And are connected respectively. Main unit CPU (401) terminal (I
NTreq) becomes “H” at a predetermined cycle, and each slave C is synchronized with that cycle from its serial out terminal (Sout).
Data blocks containing transfer data for PUs (402), (403) are sent out sequentially to the bus line by a clock signal, and each slave CPU (402), (403) serially outputs at the "H" timing assigned to itself. IN terminal
The data is taken in from (Sin) and the data is output from the serial out terminal by the clock signal. Body C
When the terminal (INTreq) of PU (401) is "L", each slave CPU (402), (403) takes in the read data and calculates, and if necessary, writes new data to the register etc. It is configured to wait until the terminal (INTreq) of the CPU (401) becomes "H".

The main body CPU (401) is provided in the main body of the copying machine (100), and mainly through the copying machine (100), the keys on the operation panel (50), the display device (52), etc. and the decoder (451). It is connected and determines the key input and controls the display output of the numerical value and the light emitting diode and outputs the signal related to the control of the copying operation. Reference numeral (452) is a RAM backed up by a battery (453), which stores variable data such as set magnification data which should be retained even after the power is turned off.

The CPU (402) is a CPU for controlling the optical system (10), receives magnification data from the main body CPU (401), and accordingly, a speed control circuit (456) for the scan driving DC motor (M ₃ ). And the exposure start switch (SW ₅₀ ) and timing switch that output a control signal to the drive control circuit (457) of the step motor (M ₄ ) for controlling the position of the lens and mirror, and are activated as the scanning system moves. Determine the output of (SW ₅₁ ).

FIG. 5 shows the relationship between the ADF control CPU (403) and its input / output. The ADF control CPU (403) is provided in the ADF (200), and the mode setting key (251) start key (SSW),
DF unit close detection switch (SW1), a document set detection sensor (SE ₃₎ and the document sensor (SE _1), and sends the input information to the (SE ₂₎ or the like and connected to the body CPU (401), a display lamp It outputs the signals for controlling the lighting of (252), (253), and (254) and the feeding and discharging of originals.

FIG. 6 is a flowchart generally showing the control contents and the processing procedure in the main body CPU (401).

In FIG. 6, step (# 1) shows an initialization process executed when the power is turned on. The initial setting means that the number of copies = 1, the copy magnification = 1x, the exposure level = standard,
The standard data of the variable items for setting the operation mode is read from the ROM and set in a predetermined area of the RAM.
It means a process of resetting other RAMs, registers, flags, etc. in U (401).

In step (# 2), switch input processing relating to various operations and detection is executed.

Step (# 3) is a subroutine showing the processing for starting the operation of the copying machine (100), and its details are shown in FIG.

Step (# 4) is a subroutine showing the process of controlling the operation of the copying machine (100), the details of which are shown in FIGS. 8 (a) and 8 (b).

Step (# 5) is a determination step showing the end control of this main routine, and the processing is returned to step (# 2) at the end of every predetermined time, whereby a series of processing is repeatedly executed.

FIG. 7 shows the details of the step (# 3) in FIG. 6, in which the conditions for starting the operation of the copying machine (100) are set. That is, in step (# 301), the document is transferred to the document tray according to the signal from the ADF control CPU (403).
It is determined whether or not it is set to (203), and in step (# 302), the open / close detection switch (S) of the DF unit (202) is
Whether the W1) has been switched or not is also determined by the signal from the CPU (403). If NO in step (# 301) or YES in step (# 302), the process proceeds to step (# 304) to print. When the key (PSW) is operated, the copy start flag is set to "1", and if YES at step (# 301) and NO at step (# 302), the process proceeds to step (# 303) to set the print key (PSW). When operated, the process of setting the ADF start signal to "1" is executed. By this, AD
With the F (200) attached, the print key (PS
W) is operated, the DF unit (202) before that
When it is determined whether the document is opened or closed, it is considered that the user manually placed the original on the original placing table (16), and immediately the copy start flag is set to "1", as shown in FIG. 8 (a). To start the operation of the copier (100), but the document is set on the tray (203) and the DF unit (202) is not opened / closed, the print key (PS
When W) is operated, it is considered that the user intended to operate the start switch (SSW) of the ADF (200) and operated the print key (PSW) by mistake, and AD
Set the F start signal to "1". The processing when the ADF start signal is "1" is shown in FIGS. 10 (a) and 10 (b).

Steps (# 306) and (# 307) are A at step (# 304)
After setting the DF start signal to "1", the ADF CPU (4
The process of setting the copy start flag to "1" after waiting for the copy permission signal from 03) to become "1" is shown. The copy permission signal is output from the CPU (403) when the document is completely conveyed to the fixed position in the ADF (200).

FIGS. 8A and 8B correspond to step (# 4) in FIG. 6 and show the details of the control routine for the copy operation. This will be briefly described with reference to the time chart of FIG.

In [Block 10], the main motor (M ₁ ), the developing motor (M ₂ ), the charging charger (3), and the transfer charger (7) are activated by setting the copy start flag to “1”. Peek start flag is "0"
Then, the copy flag "1", which means that the copying operation is in progress, is set, and the control timers (TA) and (TA-
B) is started and the clutch of the selected paper feed roller is turned on. The process for the manual paper feed mechanism (30) is omitted.

In [Block 11], it is determined that the timer (TA) has ended, and the paper feed clutch is turned off.

At [block 12], to determine the expiration of the timer (T-B), and outputs the scanning motor (M ₃₎ and on to signal to start the scanning operation in CPU (402).

In [Block 13], when the timing signal is output during the scanning operation, the timing roller clutch (CL ₁ ) is turned on in response to the signal from the CPU (402) and the timer (TC) is set. Processing is performed. The timing roller (21) conveys the copy sheet in synchronization with the image on the photosensitive drum (1).

In [Block 14], it is determined that the timer (TC) has ended, and the charging, scan motor, and timing roller clutch are turned off. In addition, a timer (T-
C) may be variably set according to the size of the copy sheet used.

In [Block 15], it is judged whether or not the set number of copies has been made at the timing of the end of scanning during the execution of continuous copying. If not completed, a timer (TD)
Set.

In [Block 16], it is judged that the timer (TD) has ended, the charging charger is turned on again, the timers (TA) and (TB) are set, and the paper feed on the selected side is performed. Turn on the department.

In [Block 17], when the optical system is returned to the fixed position and the switch is turned on to the fixed position along with the final return operation, the developing motor and the transfer charger (7) are turned off and the copy flag is set to "0". ", And a process of setting a timer (TE) is executed.

In [Block 18], it is determined that the timer (TE) has ended, and the main motor (M) is turned off.

In addition, (TA) to (TE), etc. described in the above flow chart and time chart are "1" in one routine of the processing of the CPU (401) executed within the time specified by the internal timer. It is a digital timer programmed to count up, and the time-up time is stored as numerical data.

FIGS. 10 (a) and 10 (b) show a CPU (40) for controlling the ADF (200).
It is a flow chart which shows an example of processing performed in 3). In the figure, step (S1) is initial setting,
Step (S2) shows the process of switch input.

In step (S3), it is determined whether or not a document is set on the document tray (203) by the state of the sensor (SE3). If there is a document, the document signal is set to "1" in step (S4). If there is not, "0" in step (S5) and transfer to the main body CPU (401).

In step (S6), the state of the open / close detection switch (SW1) of the DF unit (202) is determined, and in steps (S7) and (S8), a signal is sent to the main body CPU (401) according to each state. By switching this signal, the main body CPU (401) determines the open / closed state of the DF unit (202).

In step (S9), start switch of ADF (200)
Determine if (SSW) was pressed. When it is determined that the start switch (SSW) is on, the step
Use (S10) to detect the presence of documents on the document tray (203) (SE3)
Discriminates based on the output of the
In 2) and (S13), the document feed roller (205) is started to rotate to start the document conveyance and the timer (A ') is set. If the start switch (SSW) is not pressed, proceed to step (S11) and the main CPU (401) described above.
The ADF start signal from is determined, and if it is "1", the process immediately proceeds to steps (S12) and (S13).

When the end of the timer (A ') is determined in step (S14), the process proceeds to steps (S15) and (S16) to stop the document conveyance and transfer the copy permission signal to the main body CPU (401). .

Step (S17) is other processing in the CPU (403),
For example, the processing associated with the operation of the mode switching key (251) described above is generally shown, and step (S18) is the end judgment of one routine described above. When one routine is completed, the process returns to step (S2) and Repeat the process.

Effect As described above, the copying apparatus of the present invention, when the copy start command is input by the input means (print key),
When the open / close switching of the automatic document feeder is detected, even if the original is detected in the document placing part of the document feeder of the automatic document feeder, the copying machine body executes the copying independently. Is. Therefore, when the automatic document feeder is opened and closed and a document is manually set on the document glass, the automatic document feeder operates despite the intention to execute copying without operating the automatic document feeder. It is possible to prevent malfunctions such as.

[Brief description of drawings]

1 is a sectional view showing the relationship of the copying apparatus of the present invention, FIG. 2 is a plan view of an automatic document feeder, FIG. 3 is a plan view of an operation panel section of a copying machine, and FIG. 4 is a CPU of a control unit. And a circuit diagram showing its input / output relationship, FIG. 5 is a circuit diagram showing a CPU for ADF control and its input / output relationship, and FIG. 6 is a flow chart showing a processing procedure of control executed in the main body CPU as a whole. FIG. 7 is a flow chart showing the details of the copy operation start routine, FIGS. 8 (a) and 8 (b) are flow charts showing the details of the copy operation routine, and FIG. 9 is for explaining the operation of the copying machine. 10 (a) and 10 (b) is a flowchart showing an example of a processing procedure of control executed by the ADF control CPU. 100 ... Copier, 200 ... Automatic document feeder, 201 ... A unit, 202 ... DF unit, 203 ... Document tray, 400 ... Control device, 401 ... Main CPU, 403 ... ADF control CPU, SSW …… ADF start switch, PSW …… Print key SW1 …… DF unit open / close detection switch SE1 …… Document presence / absence detection sensor

Claims (1)

[Claims] 1. A first mode in which an automatic document feeder which can be opened and closed on a document glass is provided, and a first mode in which a document set on the document glass is copied by opening and closing the automatic document feeder and an automatic document feeder is operated. In a copying apparatus having a second mode in which the original placed on the original placing portion is set on the original glass and copying is performed, first detecting means for detecting opening / closing of the automatic original conveying apparatus, Second detecting means for detecting the original document on the original document placing portion, input means provided in the copying apparatus main body for inputting a copy start command, and a non-execution state in which the copying apparatus is not executing a copying operation. If the first detecting means detects the opening / closing switching of the automatic document feeder even if the second detecting means detects the original, when a copy start command is input by the input means. First mode In the non-execution state, the first detecting means detects the original and the first detecting means detects the opening / closing switching of the automatic document feeder. If not, a second control means for starting copying in the second mode when a copy start command is input from the input means, and a copying apparatus.