JPS6048667A - image copying machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Conventional Example] Conventionally, various devices have been put into practical use as devices for recording images on paper. For example, copying machines that record the original image on paper via a photoreceptor, or copying machines that convert image information into electrical signals using impact type (type type, wire dot type, etc.) or non-impact type (thermal type, inkjet type, etc.) ,
There are printers that reproduce images on paper using recording means (laser beam type, etc.).

In recent years, there has been a demand for these image recording devices to be equipped with various functions due to demands for streamlining office work and the like. In particular, there is a strong desire to improve the output speed, which is the number of sheets processed per unit time, and the speed of these devices has been increased.

However, each method has its own speed, although there are differences, and if you want to achieve higher speeds,
Numerous problems occur, and to overcome them all requires a great deal of effort such as the development of new technology, and the equipment itself becomes complicated and large, making it economically unprofitable. Taking a copying machine as an example, the original image is directly focused on a photoreceptor to create a latent image, which is visualized and transferred onto paper, so it scans the original document 7 times to produce one sheet of paper. You can only get a copy.

Therefore, in order to increase the speed, the machine speed must be increased, which may cause problems such as insufficient sensitivity of the photoreceptor, vibration and noise of the machine, and durability problems. However, if you take measures such as increasing the amount of light from the lamp that illuminates the original, a myriad of problems will occur, such as the heat emitted by the lamp causing the machine to heat up. It will be difficult to solve this problem. Furthermore, since the occurrence of such problems increases exponentially as the correlation increases, the upper limit of speed is naturally limited when considering the balance with the merits of speeding up. On the other hand, from the perspective of saving resources and space, there is a demand for recording on both sides of paper, which was conventionally recorded on one side of paper, in the same way as in general printing, and reducing the number of sheets used. There is. Regarding this problem as well, collect the papers recorded on the first page once,
A method has been proposed and put into practical use in which after the first side has been recorded, the stacked sheets are fed again and recorded on the second side. However, although this method is efficient when producing multiple copies of the same content, it is extremely inefficient when producing multiple copies of different double-sided records. That is, 1, 2. 3, 4. When creating a page, first write 1, 3, 5, etc. on the first side of each sheet.・・・・・・
... and record the odd numbered pages, and after finishing that, refeed them all and write 2.4.6 on the back side. ...and the page will be recorded. However, if a double feed or a paper jam occurs during refeeding, the combination of front and back pages will be different from the predetermined combination, and the recording will have to be made again from the beginning. In order to avoid this, it is possible to record the front, back, front, and back of each sheet of paper one by one, but it takes time and effort to refeed the paper, etc., and efficiency is extremely reduced.

Furthermore, with regard to higher functionality, there is a demand for recording two pieces of information in an overlapping manner on one side of a sheet of paper. % Recently, records in various fields have become colored, and there is a demand for documents to be easier to read by mixing red records, for example with red titles, instead of the traditional black color. .

On the other hand, with conventional equipment, it was possible to do this using methods such as using inocli ribbons, but with copiers, laser beam printers, etc. that use electrophotography, the equipment would be very large-scale VC equipment. It has not yet been put into practical use for general office work. However, a simple method is to record in black once, then after FC, replace the developing device in the device from black to red, and then record on the same side again, which is very time-consuming. I failed.

[Purpose of the invention]

This invention was made in view of the drawbacks of the above-mentioned conventional example,
It has a completely different configuration from conventional image copying devices, with an image recording device consisting of a first image recording section, a second image recording section, and a paper handling section, and a document reading device having a document condition recognition function. The present invention aims to achieve high-speed, multiplex, double-sided copying, and higher functionality of each of the above-mentioned copies.

〔Example〕

The present invention differs from conventional copying devices in that a plurality of image recording sections are provided in the device, and a paper handling section interposed between them is more organically connected to achieve the above-mentioned high speed, double-sided printing, and Its purpose is to realize multiplexing.

An embodiment of the present invention will be fully explained below with reference to the drawings.

FIG. 1 depicts the basic configuration of this embodiment, centering on the paper conveyance path, where 1 is a main body, 2-digit first image recording section, 3 is a second image recording section, 4 is a paper handling section, Reference numeral 5 indicates a first paper picking section, 6 a second paper picking section, a 7-digit single stacker section, and 8 a second stacker section.

The first and second image recording sections 2.3 are laser beam printers and have almost the same configuration. In the first image recording section, reference numeral 200 denotes a rotationally driven photoreceptor, around which a known electrophotographic process unit is arranged (not shown). A laser beam modulated according to an image signal is scanned and exposed onto the photoreceptor 200 by a laser scanner 202 via a mirror 201, and is visualized by a predetermined electrophotographic process. On the other hand, the sheets 501 stacked on the second sheet feeding section 5 are fed into the sheet feeding path 203 of the first image recording section 2 one by one by a sheet feeding means 500 such as a known roller.

The fed paper reaches the transfer section 204 in synchronization with the image developed on the photoreceptor 200, and the image is transferred by known transfer means.

The paper then reaches the fixing section 205, where the image on the paper is fixed by known means such as heating or pressure, and the image is fixed onto the paper through the ejection path 20.
6 and is discharged to the outside of the first image recording section 2. Note that conveyance means such as rollers and belts are appropriately arranged on the passage path of the paper.

The second image recording section 3 is different in that, in addition to the paper supply passage 303 that receives the paper 601 loaded on the second paper pick-up section 6, it also has a second paper supply that receives paper from the paper handling section 4. A passage 312 is provided. The sheets received from both paper supply paths are also guided to the transfer section 304.

Next, paper handling s4 will be explained.

The paper handling unit 4 receives the paper from the carry-in passage 400 connected to the discharge passage 206 and transfers the paper from the paper output passage 401 to the paper supply passage 312 without inverting or inverting the paper, or passes through the paper reversing unit 402 to the paper output passage 403. The stacker is then delivered to the first stacker section 7.

FIG. 2 is a drawing showing the paper handling section 4 in more detail. Rollers 407 and 408 of paper entry path 400
t-t, rotate in the direction of the arrow, and at the end there is a passage switching claw 409
is located. The path switching pawl 409 is swingable around a shaft 410 and is constantly urged counterclockwise in the drawing by a spring 411, so that the path switching pawl 409 is rotated so that the sheet path is directed toward the sheet reversing section 402.
C. I am doing it.

If the solenoid 1412 operates now, the passage switching pawl 4
09 rotates clockwise against the spring 411 to switch the passage to the carry-out passage 401 side. A claw 413 that hangs down due to its own weight is provided at the entrance of the paper reversing section 402, and
The paper sent from 00 to the left in the figure can push aside the lower surface of the claw 413 and pass through, and the paper returned from the paper reversing section 402 in the direction shown in the figure is guided by the upper surface of the claw 413 and is sent to the carry-out passage 401. It's on its way. Claw 41
A paper detector including a lamp 414 and a light receiving element 415 is provided next to the paper sheet 3 . 416.417 is a reversing roller and a driven roller. The reversing roller 416 is connected to the shaft 420
It is attached to the tip of an arm 418 that can be swung around , and constantly rotates in the counterclockwise direction shown in the figure. Arm 418I
lT3 is lowered by l-j spring 419 and 5 reverse low 24
16 has a distance from the 5 normal driven roller 417,
When the solenoid 2421 is activated, the arm 418 swings clockwise, and the reversing roller 416 moves to the driven roller 417.
be forced to. The driven roller 417 is rotatably supported, and rotates clockwise when the reversing roller 416 is pressed. Next to it is a belt 422 that rotates in the direction of the arrow, and a 77-inch belt 423 below it attracts the paper to the belt 422 and conveys it to the output path 40.
It is designed to lead to 3.

Next, the functions of the paper handling section 4 will be explained.

First, when leading directly from the carry-in passage 400 to the carry-out passage 401, actuate the solenoid 1412 to switch the passage switching pawl 409, and move the passage from the carry-in passage 400 to the carry-out passage 401.
form a passageway to. Also.

When guiding the paper to the unloading path 401 after reversing the paper,
The paper reversing unit 4 rotates the paper without operating the solenoid 1412e.
Lead to 02. The leading edge of the paper is connected to the reversing roller 416 and the driven a-
When the paper passes between the rollers 417 and onto the belt 422, it is sent to the left by the suction force of the fan. When the trailing edge of the paper is detected by the buoy 14 and the light receiving element 415, the solenoid 2421 is activated, and the reversing roller 416 is pressed against the driven roller 417 to sandwich the paper. At this time, since the reversing roller is rotating counterclockwise, the paper overcomes the friction with the belt 422 caused by the F/423 and is sent in the direction shown. In other words, what had hitherto been the trailing edge of the paper now becomes the leading edge. When the leading edge of the new sheet reaches the pawl 413, the pawl 413 serves as a guide as described above, and the sheet is guided to the carry-out path 401. At this time, the front and back sides of the paper are reversed compared to when the paper is led directly to the aforementioned carry-out path 401.

On the other hand, when guiding the paper to the unloading path 403, the solenoid 2421 is left inoperative after guiding the paper to the paper reversing unit 402 without activating the tolenoid 1412. It is sent to the left for joint operation, and is guided directly to the carry-out passage 403.

The first and second stacker sections 7.8 are an ejection path 403 of the paper handling section 4 and an ejection path 3 of the second image recording section, respectively.
The sheets discharged from 06 are stacked one after another.

Next, the functions of high-speed recording, single-sided recording, and multiplex recording using this apparatus will be explained with reference to illustrations.

(1) High-speed recording When performing high-speed recording, as shown in FIG.
, 3, and both image recording units are operated in parallel.

That is, the first image recording section 2 receives paper from the second paper feeding section 5, records an image on one side of the paper according to the signal S, and transfers it to the paper handling section 4.1. In the paper handling section 4, the solenoid 1412 and the solenoid 2421 are not activated.
The receiver transports the loaded paper from the carry-out passage 403 to the first stacker section 7.
Extract to. On the other hand, the second image recording section 3 has a second paper feeding section 6.
The paper is supplied from the paper, and after recording an image on one side of the paper according to the same signal S1 as that of the paper, the paper is discharged from the discharge passage 306 to the second stacker section 8. If you do this, the -
If the throughput per unit time of the second image recording section 2.3 is respectively N, then the throughput of this apparatus as a whole is 2N sheets per unit time, realizing twice the high speed recording.

([1-Double-sided Recording When performing double-sided recording, as shown in FIG. 4, the first image recording section 2 records the first image signal S2 on the first side of the paper, and the second image recording section 3 Then, the apparatus is operated to perform recording on the second side using the second image signal S3.

That is, first, the first image recording section 2 receives a sheet of paper from the second sheet feeding section 5, records an image according to the signal S1 on its first side (upper side in the figure), and transfers it to the sheet handling section 4. In the paper handling section 4, the paper is reversed as described above. That is, the paper is sent to the paper reversing unit 402 without activating the solenoid 1412, and then the paper detectors 414 and 415
When it detects that the trailing edge of the paper is passing, the solenoid 2421 is actuated, and the paper is led to the carry-out passage 401 with the trailing edge leading up to that point, and delivered to the second image recording section 3.

The paper passed to the receiver is transferred with the image by the signal S in the transfer unit 304, but the paper that receives the transfer (top side in the figure) is reversed, so the image is transferred in the first image recording unit 2. This is the second page behind the first page.

The paper on which the image is also recorded on the second side is transported to the discharge path 30.
6 to the second stacker section 8, and the double-sided recording is completed. During this time, the second paper picking section 6 is left inoperative.

(■) Multiplex recording When performing multiplex recording, as shown in FIG. Recording is performed using the signal S.

That is, first, the first image recording section 2 receives a sheet of paper from the second sheet feeding section 5, records a first image based on the image signal S1 on one side (the upper side in the drawing), and transfers it to the sheet handling section 4. In the paper handling section 4, the solenoid 1412 is operated, and the received paper is transferred as it is from the carry-out passage 401 to the second image recording section 3. The paper handed over to the receiver is transferred to the transfer section 3.
At step 04, an image of a different color from the first image is transferred by the image signal S. The surface that receives the transfer here (top surface shown)
is the same as the surface transferred by the first image recording section 2.

The paper on which the second image has been recorded is discharged from the discharge path 306 to the second stacker section 8, and the multiplex recording is completed.

In addition to the high functionality described above, the recording apparatus of this embodiment can perform functions equivalent to those of two apparatuses with one apparatus. A signal S, of unrelated content and timing, as shown in FIG.

S allows the double-sided image recording units 2 and 3 to operate independently.

That is, the first image recording section 2 receives paper from the second paper feeding section 5, records an image on one side of the paper according to the signal Sl, and transfers it to the paper handling section 4. In the paper handling section 4, the solenoid 1412 and the solenoid 421 are not operated, and the receiving paper is discharged from the carry-out passage 403 to the first stacker section 7. On the other hand, the second image recording section receives paper from the three-piece second paper feeding section 6, records an image on one side of the paper according to the signal S2, and then discharges the paper from the discharge path 306 to the second stacker section 8. In this type of usage, this recording device alone can
The processing capacity per unit time can be equivalent to that of two machines.

FIG. 9 is a system block diagram of the control circuit of the image recording apparatus 1. This control circuit consists of three elements (first image recording section,
It consists of independent controllers for the paper handling section and second image recording section, respectively, and a master controller that controls these controllers. Therefore, the host controller that controls the image reading device that outputs the image signal is the master controller.

It has an interface with a second image recording unit controller and a paper handling unit controller.

FIG. 8 is a block diagram of the master controller. In the figure, the host controller 7-, J: (7) At the interface, the IO boat! 4) The mode designation by the signal given to the terminal l (hereinafter referred to as l0f4)-1) is a DOUBL mode that operates two image recording sections in this recording device simultaneously to improve the recording speed of the same image.
E SIMPLEX MODE, the paper recorded in the first image recording section is reversed in the paper handling section, and the second image recording section records the back side of the paper.
MU DJ 5UPF3RPO8E MOIJE's 5UPF3RPO8E MOIJE which moves the paper recorded in the first image recording section to the second image recording section using the paper transport section and records a new image in addition to the recorded image in the second image recording section. % of total 4)
It is to specify the The signal given to I(04)-4 is a request signal for knowing the status of the image reading device.
The output from which this controller notifies the host side of status information in response to this request is a status signal issued from 10(4). 4!7 When the controller receives this request signal, l0fl)-3, 4, l0t2)
-4, 5, IO+31 Interimize status information to the controllers for each of the three elements via 3.4, compile and organize the results, and notify the host side via lo(4)-5. It looks like this. Here, the status information means whether or not a jab occurs within each of the three elements, where in each element it occurs,
How many sheets of information have been recorded? Is copy paper stored in the first and second recording sections? What is the size of the paper?
This information includes whether there is a developer, whether the laser is lit sufficiently, whether the scanner has reached the desired rotation speed, whether the photoreceptor is rotating at the desired speed, etc. Upon receiving this status information, the host side issues a start command to l014)-2 if the status information satisfies the recording conditions. Accordingly, this controller selects all or part of I0(1)-1, I0+2)-2, and lo(3)-1 in accordance with the mode specification, and gives a start command to the corresponding controller. According to this startup command,
first.

In the case of the second image recording section, when the drum, charger, phenomenon device, etc. are energized and the image can be recorded, I0i1
) -2, I 0f3) Returns a ready signal to -2.

Further, in the case of the paper conveying section, if there is no jam condition, a ready signal is immediately sent to 101213. After confirming this ready signal, this controller sends the ready signal from l0j4)-3 to the host side. After confirming this signal, the host side gives a print command to IO+4)-5.

Accordingly, this controller assigns I 0 to the corresponding element.
(1)-5, IO+3) Gives a print command via -5. In each recording unit that receives this, the registration roller (207 or 308 in FIG. 1) is stopped rotating at the same time as paper is fed, and when the paper reaches the registration roller, l0fl)-6, I0( 3) Return the vertical synchronization request signal to -6. In other words, the registration rollers are arranged so that the distance from the registration roller to the transfer section (204 or 304 in FIG. 1) is equal to the distance from the image recording position (208 or 308 in FIG. 1) to the transfer section. Therefore, the paper is stopped at this registration roller until the next vertical synchronization signal arrives. Upon receiving the vertical synchronization request signal from the corresponding recording unit, the controller sends it back to the host side from lo(41-8).

After receiving all of these signals, the host side generates a vertical synchronization signal at a convenient timing and at the same time transmits the video in synchronization with the horizontal synchronization signal given from this controller. In accordance with this vertical synchronization signal, the registration roller of the corresponding recording section starts rotating again and transports the recording paper that had been stopped. Since recording is also started at the same time, the paper and the transferred image in the transfer section are aligned.

- 10,000, while the host side is transmitting video, all video enable signals are given to the controller's lo(4)-9 as signals corresponding to that period, and when this signal becomes inactive, this controller ends recording. can be known. The recording switching signal output from IO+4)-7 is DOUPLgX MODE and suPw几PO8B M
At the time of OIJg, this is a signal requesting the host for information to be recorded on the back side or information to be superimposed. Since this signal causes the paper to be supplied from the paper transport unit to the second image recording unit, the host does not need to provide the print signal to f 0 (4)-6. Therefore, the host uses vertical synchronization (the word is ■101
All you have to do is wait for it to come back from 0-8-8.

FIG. 9 is a drawing specifically showing the switching circuit 8-1 in FIG. 8. The circuit shown in FIG. 99-1 consists of the first,
and a switching circuit for a horizontal synchronization signal generated in the second image recording section.

As mentioned above, there is only one system for the video signal to the image recording section even though there are two recording sections, so even though the same signal may be recorded on two recording sections at the same time, Two different image signals are never recorded on two recording sections with their timings overlapping. Therefore, it is only necessary to select the horizontal synchronizing signal from the recording section to be recorded at that time and supply it to the host. This switching is performed according to FIG. 10(5)-1. Figure 99
=2 is a switching circuit for supplying a vertical synchronizing signal and a video signal from the host to both or one of the first and second image recording sections. When the IO+51-2.3 signal is active, both l015)-2 is active and lo(
5) When -3 is inactive, to the first image recording section, I
When O+51-2 is inactive and l0f5)-3 is active, the video signal is supplied to the second image recording section. The control described above is performed by the CPU (for example, 8085, etc.) shown in FIG. 8-8-2, and the control program is shown in FIG.
, OMg=3. Figure 8 Le AM8-4
, temporary information related to control such as status information is stored.

FIG. 11 is a system block diagram of the first image recording unit controller. In the figure, I(]2)-1 sends a signal to drive the paper feed roller (500 in FIG. 1), and lo(
2) The signal of paper sensor-1 given to IO+21 is a signal corresponding to the paper sensor 1209 in FIG.
The signal of the paper sensor 2 given to the paper sensor 2210 of FIG. lo(2)-4
, 5 and 6 form a latent image on the photoreceptor (200 in FIG. 1),
Sends control signals for development. The signal from the toner presence sensor applied to l0f2)-7 is a signal indicating the presence or absence of developer and is generated by a detection device provided within the developer. The remaining paper amount check signal given to lo(2)-8 is a signal for detecting the remaining paper amount in the paper storage section (FIG. 1, 5), and the drum clock given to lo(2)-9 is: This shows the drum rotation encode signal from the drum rotation periodic disk provided on the drum shaft, and is the basic signal for sequence control. 10C2)-10 inputs a print signal generated by a clip 70 tube 11-4 (hereinafter referred to as DO/F11-4). I 0(2)-
The signal given to 13 is an appropriate potential signal indicating whether the surface potential of the drum is at a sufficient potential for recording;
The signal given to l0t21-11 is a laser ready signal indicating whether the laser light intensity and perfect wavelength are at appropriate values, and the signal given to I0t21-12 is a laser ready signal indicating whether the scanner rotation speed has reached the desired value. This is the scanner ready signal. Normally, CPU1'1-1 monitors the 1 paper remaining sensor, scanner ready, and laser ready signals, and receives I O+1 from the master controller.
)-3, the status is sent back via lo(1)-4. When the status is normal, upon receiving a start command from I0(11-1), it activates the signals output from l0t2>-4, 5, and 6, and then monitors the appropriate potential signal given to I0(21-13). Then, when it detects that the appropriate potential has been reached,
(2) Send a ready signal from 0(1)-2. Next, wait for the print signal to be sent from the master controller to I0(1)-5, and when it arrives, lo(2)-1
Activate the paper feed signal output from the

After that, the paper is conveyed toward the registration rollers (207 in FIG. 1), but the registration rollers are
It is designed to stop when a print signal is supplied to 4. This paper is paper cloth sensor 1 in front of the registration roller.
(Fig. 1 209) Since e is activated, CP Ul
When all of these are detected through i'I (]2)-2, a timer corresponding to the time + α time taken for the paper to reach the paper cloth sensor 1 to the registration roller is started, and when the time is up, the timer is started from 1Ofl)-6. Sends a vertical synchronization request signal to the master controller to start sending out the vertical synchronization signal and video. After this, a vertical synchronization signal is sent and F/F'1
Outputs 1-4 become active, the registration rollers are driven to rotate, and the sheet is restarted to be conveyed toward the transfer section. Also, since the output of this F/F 11-4 is manually input to IO+2)-10, after sending the vertical synchronization request signal from I(Jm-6), monitor the resist drive signal at 10(2)-10. , after confirming that it is active, move the paper cloth sensor 2 (Fig. 1 210) from the registration roller.
) and starts preparations for detecting a delay jam. After that, the status signal is checked again, and the activation command and status request from the master controller are monitored. If the activation command is received, the above sequence is repeated, and if there is a status request, the contents checked so far are sent to the master controller. It is supposed to be done. If the tine times up during the above processing, I (]21-3'
(Monitor the status of the paper/fabric feeder 2 through
Get ready for the check. The delayed JAM and accumulated JAM
The timer circuit consists of an internal timer circuit of the CPU 11-1, and operates independently from the main program.When the timer expires, an interrupt is generated to the CPU 131 no matter what process the main program is in progress, and at that point, the paper cloth The status of server 2 is checked.

FIG. 14 shows a flowchart for the above control, which is stored in the 9OM of program box 11-2. Temporary information such as status information is also stored in AMl 1-3.

FIG. 15 is a system block diagram of the second image recording unit controller. The structure is basically the same as that shown in FIG. 13, but as is clear from FIG. Third paper cloth sensor 331
1 exists. The former detection signal is i 0t2
)-15K, the latter detection signal is input to I0 (21-14).The first registration roller 30 is connected to F/F1
3-1, the second registration roller 310 is controlled by F/
It's controlled by F13-2! The output of '/F13-1 becomes non-active with the print signal of the master controller and becomes active with the vertical do I period signal.

The output signal of the F/F 13-2 becomes non-active when the signal from the paper cloth sensor 3311 is active, and becomes active when the vertical synchronization signal is active. Therefore, in sequence control, the difference from the first image processing unit controller/controller is lo(1
)-2, the CPU monitors both the print command from the master controller given to IO+1>-51C and the active signal of the filter paper cloth sensor 3 given to lo(2)-14, Control is performed according to the one detected first. Therefore, first l
When a print command given to o(13-5 is detected, the control is similar to that by the program of the first image recording unit controller in FIG. 12, but the print command given to lo(2)-14 is
given to. When the signal from the paper fabric sensor 3 is detected, a timer corresponding to the time 10α from the paper fabric sensor 3 to the second registration roller is detected,
After time-up, a vertical synchronizing signal is sent to i(]I)-6, and then the second registration roller drive signal of IO+2)-15 is mortared to confirm that it is active. The subsequent steps are the same as the control by the first image recording unit controller in FIG. 12, and will therefore be omitted. Here, lo(1)
Regarding whether or not the master controller is outputting the print signal given to -5, the master controller manages each element according to MODhi and sends the image signal to either the first image recording section or the second image recording section. As a result of this judgment, 1 in Figure 10
Since the recording switching signal is sent to the host side from 0(4)-7, the host side ultimately controls the print signal.

Returning again to the switching circuit 9-1 in FIG. SLMPL, K
In the X MODK, ViIO(5)-1 is active and the horizontal synchronization signal of the first image recording section is selected. I'm sorry for the inconvenience, but the scanners of the first and second image recording sections, and the driver = r
Q: Both the first and second image recording sections are rotating at the same speed. The same video signal will be supplied to the scanner in DO1JBLE81NPLEX MOL)E from this company, but first.

Even if the second scanner rotates at the same speed, it is asynchronous depending on its rotational position. Therefore, the video signal is sent by the horizontal synchronization signal of the first image recording section, but for recording in the second image recording section, this video signal is synchronized with the horizontal synchronization signal of the first image recording section. Therefore, a buffer memory for video signals for several lines is provided in 13-6, data is written into the memory in synchronization with the horizontal synchronization signal of the first image recording section, and the horizontal synchronization signal of the second image recording section is written into the memory. The synchronization is re-established by reading it with . FIG. 14 shows a program flowchart for the above control, and this program is stored in )t, 0M13-4.

RAM13- as temporary memory for status information
5 is provided.

FIG. 15 is a system block diagram of the paper reversing section controller. In the figure, for the three types of mode designations in the image recording section given to I0H)-1 from the master controller, the mode designations of this controller are as follows.

Tsumari, B, 'rH for SIMPIX MODHVC
ROUGH MOL)H is DUj:'LEX MODl
5WITCH-BACK MODE for fl,
Also, for 5UPKl-LP08B MUDW, BI
PASS MOI)H is supported.

The signal of the paper cloth sensor 1 given to I0(2)-1 is given to 404 in FIG. 1, and the signal of the filter paper cloth sensor 2 is given to 404 in FIG. (21-3v
r-The signal of the filter paper cloth sensor 3 given is 40 in FIG.
It corresponds to 6. , and the solenoid 1 signal outputted from l0t21-4 corresponds to 412 in FIG. 2, and the solenoid 2 signal outputted from l0t2)-5 corresponds to 421 in FIG. IVIODi('L”)4RO(JGH and 5WI
In TCHBACK, the solenoid is deenergized according to the MODE designation, and in BIPASS, it is energized.

8WITCHBACK MODhiK&'s paper reversing function will be explained next.

The signal from the paper fabric sensor 1 becomes active, and then the movement until it becomes active is monitored, and at the same time it becomes non-active, solenoid 2 is driven, and the signal from the paper fabric sensor 1 becomes active again, and it becomes non-active. This process is monitored, and solenoid 2 is stopped when it becomes inactive.

For delay jam and retention jam functions, please refer to THROUG
In HMODg, paper cloth sensors 1404 and 2405 detect delay jams, accumulated shamla, and SW in the carry-out passage 403.
I T Ci (BA CK M
In MODg, the paper cloth sensor 3406 detects the unloading path 4.
01 (Fig. 2) is calculated. As for the status.

A VC is provided from l0m-5 so that it can output to the master controller according to its request.

FIG. 18 is a program flowchart of the above control.
show. This program is stored in the UM15-2. Additionally, temporary information such as "AMl 5-31CUx status" is stored.

FIG. 17 shows how the main image recording device (hereinafter referred to as printer) and the document reading device (hereinafter referred to as reader) 9 are connected by cable 1.
This cable 10 is connected to the input/output signals of the IO port l0(4) in FIG.

FIG. 18 is a structural sectional view of the printer shown in FIG. 17. The original is placed face down on the original glass 18-3,
Its placement reference is on the back left side when viewed from the front. The original is pressed onto the original glass by the original cover 18-4.

The document is illuminated by a fluorescent lamp 18-2, and the reflected light passes through mirrors 18-5 and 18-7 and a lens 18-6, forming an optical path so that it illuminates onto the surface of CCl)l8-i. has been done. The mirror 18-7 and the mirror 18-5 are arranged to move at a relative speed of 2:1. This optical unit is powered by a DC servo motor.
Move from left to right at a constant speed while using LL. This moving speed 11i is 180 mt on the outward journey when the entire original is irradiated.
r/w, and the return path is 468mm/9Bc. Solution of this sub-scanning direction 1 & degree 161 ines/ir
It is i+. The sizes of originals that can be processed range from A5 to A3, and the orientation of originals is A5, B5, and A4 are placed vertically, and B4. A3 is required when placed horizontally.

Then, adjust the return position of the optical unit according to the document size.
There are three locations. 1st voice/toke A5. B5. A4
Commonly, the second point is 22011 meters from the document reference position, the second point is B4 at the same <364 m, and the third point is A3 at the same <431.8 m.

Next, in the main scanning direction, the main scanning width is at most 297 widths of A4 paper depending on the document placement direction. And in order to resolve this with all 16 pel/wyg,
The number of pits in COD is 4752 (=297x16)
This device requires 2628 bits of C.
Two CD arrays were used and driven in parallel. Therefore, from the conditions of the IR formula, the main scanning period (= Figure 19 is a system block diagram of the reader unit. This is done by connecting to the side IO+41 in FIG.

The CCD reading sections 19-1 and 19-2 include a COD clock driver, a signal amplifier from the CCD, and an Al1
) has a built-in A/D converter. This C
The control signal to C1) is generated by the CCDCD control signal generating section 19 and supplied to the clock driver of the CCD reading section 19-1, 19-2. Note that this control @ signal is generated in rotation with the horizontal synchronization signal BD from the printer. CCD
The image data converted into a 6-bit digital signal is sent from the reading section 19-1 and 19-2 and sent to the image processing section 19-2.
3. Entered in 19-4. This image processing section 19-3.
19-4 includes a sampling circuit for sampling the Ail (CCL) output and controlling the light intensity of the light source by the CPLI, a peak hold circuit for detecting the peak value of the light intensity in each main scan to perform the AE function, The 6-bit image data after the shading correction is completed by the shading amount detection circuit for the light source, the lens, etc. and its correction circuit, and the previous two steps.
Alternatively, it has a quantization circuit for determining the slice level based on the peak hold 1 straight or dither pattern of the previous line and performing binarization or ternarization. Image processing section 19-3
The image signal quantized in , 19-4 is sent to the image editing section 19
-6.Input on 19-7.

The image editing sections 19-6 and 19-7 have buffer memories for two lines. The capacity for 1247 pixels is tC, which is more than twice that of 14752 pixels per line. This is because when enlarging by 200%, each pixel data is written into the memory at twice the sampling rate, so the amount of data is doubled. Also, the reason for the 2 line/minute buffer memory is that the memory cannot perform writing and reading at the same time, so when the Nth line image data is stored in the first memory, the N-1 line data is stored in the second memory. This is because the image of the eye line is made to show the bladder. This part also includes a write address counter for writing image data into the buffer memory, a read address counter for reading data, and an address selector circuit for switching address signals from these two counters. The counter uses a parallel I reload type in which the initial value can be preset, and the initial value is C.
PU is 1. It is designed to be loaded into the U port.

The CPU follows the coordinate information V instructed by the operation unit, and every time the sub-scanning reaches the line corresponding to the trimming coordinates, the CPU presets the address value corresponding to the main-scanning coordinates in the counter and edits the document information. b] Notoshiru. Coordinate area 1fI11 fg for white masking, black masking, white frame trimming, and black frame trimming to m3 function
A gate circuit and a gate circuit therefor are also provided. Furthermore, a shift register for linking CCD movements is provided.

Based on the above configuration, the machine II1. Explain.

Since the image data from the image editing section is first output from 19-6 and then output from 19-7, it is the composition section 19- that smoothly switches all of them to form a single piece of serial image data. It is 8. The recognition unit 19-9 presses the copy button/
This is to detect the coordinates where the document is placed by pre-scanning the document during the idle rotation period of the printer after turning on the printer.

This part is provided with a shift register for detecting 8 bits of continuous white image data, an I10 port, and counters for king and sub-scanning.

The operation unit 19-10 includes a key matrix, an LED liquid crystal, and a liquid crystal driver. 19-11 is DC for optical system scanning
It is a motor, and 19i2 is its drive circuit. 19-
13 is a fluorescent lamp for illuminating the original, and 19-14 is its lighting circuit. 19-15Fi optical system unit is in the home position.
Reference numeral 9-16 is a photo sensor for detecting that the optical system unit is in a position to irradiate the leading edge of the document. CPU section 19-
17 is composed of a CPU, a 1-LOIVI-LE AM, a pull-up circuit, a timer circuit, and 10 ports.The CPU section 19-17 has an interface with the operation section 19-10, and It controls the sequence of the reader in accordance with the operation command, and at the same time controls the blurring/printing with the command.Furthermore, in accordance with the command related to image processing, the image processing units 19-3, 19 are operated before or during scanning of the original.
-4. Data is set for various colors/colors in the image editing section 19-6 and 19-7. Note that, prior to scanning the original, the CPU performs one
It performs optical control on the fluorescent lamp lighting device 9-14, presets speed data for the DC motor drive circuit 19-12 according to the magnification command, and performs optical control on the fluorescent lamp lighting device 9-14.
, 19-7, and calculates the amount of connection.

Next, the automatic document recognition circuit in the recognition section 19-9 in FIG. 19 will be explained.

Figure 20 shows a state in which an original is placed on the original table glass 18-3. Basically, the mounting position is fixed, but it can also be placed diagonally as shown in this figure. In this case, the document table 18-
From the reference coordinate 81' on 3, the coordinates of the four points are (x+ +YI), (X
,,y, ),(Xll.

Y3), (X4, Y4) During the pre-rotation operation period of all printers, the optical system is pre-scanned and detected. This allows the size and position of the document to be determined. This makes it possible to determine the scanner scan stroke during multi-copying and to select a desired cassette.

The document cover 18-4 is mirror-finished so that image data outside the area where the document is placed is always black data. In order to perform full scanning over the entire glass surface, main scanning and sub-scanning are performed, followed by scanning for printing. Note that the sub-scanning speed at this time is higher than that during printing.

FIG. 21 is a block diagram of a circuit for detecting the coordinates. In the figure, image data VIDEO that has been binarized by pre-scanning is input to a shift register 21-1 in units of 8 bits. When the 8-bit input is completed, the gate circuit 21-2 checks whether all of the 8-bit data is a white image, and if so, the signal line 21-3 is
Outputs 1 to . After starting scanning the original, F/F 21-4 is set when the first 8-bit white appears. This F/F2
1-4 is VSYNC (image 1i [issue)] K! It has been reset in advance. After that, it is left set until the next VSYNC comes. When F/F 21-4 is set, the current main scanning counter 21-20 is stored in latch X+215.
The value of is loaded. This becomes the X coordinate value. Also, the value of the sub-scanning counter 21-21 at that time is loaded into the latch Y121-6. This becomes the Y coordinate value. Therefore,
From this, the coordinate P+ (Xs - Ys) is calculated.

Also, each time 1 is output to the signal line 21-3, the value from the main scanning is loaded into the gold latch X221-7. This value is immediately loaded into latch X321-8 (until the next 8 bits enter shift register 21-1). When the value from the main scan when the first 8-bit white appears is loaded into latch
The comparator 21-9 compares the data with the data of "o" at point cR. If the data of latch -10
loaded into. Also, at this time, the 1st shift of the by-product 1 counter is loaded into the latch Y221-11. This operation is processed until the next 8 bits enter the shift register 21-1. In this way, latch Xa21-8 and latch X, 21-1
If 0 data is applied to the entire image area, latch X42
The maximum value of the document area in the X direction remains in 1-10, and the coordinate in the Y direction at this time remains in latch Y221-11. This is the P2 (X2, Y2) coordinate.

F/F21-12 is set when 8-bit white first appears for each main scanning line, and the horizontal synchronizing signal H8YNC is set.
is reset, the first 8 bits are set to white, and the next H8
Hold with YNCe. At the time when this f''/F21-12 is set, the value of the main scanning counter is latched xs21 13
77+Xe 21 until the next H8YNc
141CC"-code. And latch X?21-15
The size is compared by the controller 21-16. Latch X.

rTla in the X direction at the time of V8YNC occurrence on 21-15
The X value is preset. If latch X721-1
If the data in 5 is larger than the data in latch X and 21-14, signal 21-17 becomes active and latch
, 21-14 or latch X.

21-13 is loaded into latch X721-17. This operation is performed between )18YNc-)(SYNC.If the above comparison operation is performed for the entire image area, the minimum value of the document coordinates in the X direction will remain in the latch X?21-15. Also, the signal line 21-
When 17 outputs, the value from sub-scanning is latch Y321-
18. This is Ps (Xs, Ya)
It is.

Latches X42119 and Y42120 are loaded with the main scanning counter value and sub-scanning color value each time 8-bit white appears in the entire image area. Therefore, after the document scanning starts, the counter value at the time when the last 1c8-bit white appears remains the same color/color. This is P4 (X4, Ya).

Next, a double-sided copying function using a reader and printer will be explained.

Figure 22 shows a double-sided copy state 22-3 or 22-4 obtained from two single-sided originals 22-1 and 22-2 with a binding margin on the left side placed side by side on the document table of this reader. It shows. In the figure, the characters copied on the back side are indicated by dotted lines.

In Figure 23, 23-1 is the bee 1 placed on the left side.
The manuscript 23-2 shows the manuscript of page 2 placed on the right side. Further, 23-3 indicates the document reference, the arrow 23-4 indicates the main scanning direction, the arrow 23-5 indicates the sub-scanning direction, and the dotted line represents the return path for the next reading scan. . 23-6 and 23-7 indicate the copy up state, and 21-8 and 23-9 indicate the main scanning direction of the printer.

Then, send a copy of 23-6 to the trekker in Figure 19, 8.
To obtain ACB DOWN, the reader first performs @scan to detect the document area, and the CPU in the reader calculates a total area of 1] and 7 widths in the sub-scanning direction. Next, for actual document scanning IC, CPUId7':ytarKD[J
After instructing PL and EX MODE, a print command is sent to the first image recording section to form an image. Next, when the vertical synchronization request signal is returned from the first image recording section, C1)U in the reader sends a signal indicating that the scanning direction is from left to right to the CCDCD control signal generating section 1°9. , start scanning the document. Immediately after the start, a vertical synchronizing signal generated by the image leading edge signal is sent to the first image recording section, and at the same time, video signal transmission is completely started.

This video signal is generated in synchronization with the start of transmission of the vertical synchronization signal. The document sub-scanning stops at i in the document sub-scanning area, and the optical system is reversed to return to the pomme position.

During this time, at the time of ejection of the first image recording section, the 23-6
An image like this will be obtained.

This copy paper is reversed by the 5WITCHBACK operation in the paper handling section and then supplied to the second image recording section. During this time, on the reader side, after confirming that the recording switching signal from the paper handling section controller in the image recording section becomes active, it starts monitoring the vertical synchronization request signal from the second image recording section.

When this signal is confirmed, the reader starts scanning the document again, and when it reaches the pre-recognized coordinate point 1 in the sub-scanning area, it sends a vertical synchronization signal to the second image recording section and also outputs a video signal. Resume sending. Then, when this scanning reaches a pre-recognized sub-scanning area of the document, the optical system is reversed toward the Baum position.

By the above copying operation, a double-sided copy like 23-7 is obtained in the second trekker of FIG. 19.

In contrast to FIG. 23, FIG. 24 shows a case where page 1 is placed on the right side and page 2 is placed on the left side. In this case, the timing of image output in the sub-scanning may be changed back and forth as shown in FIG. 23.

FIG. 25 shows that a double-sided copy state 25-3 or Fi 25-4 is obtained from two single-sided originals 1.2 with a binding margin on the upper side placed on the document table of this reader. be.

In FIG. 26, 26-IF! 26-2 shows the original page 1 placed on the left side, and the original page 2 placed on the right side. In order to obtain a copy output of 26-6 from this state, the reader first performs pre-scanning to detect the document area,
The CPU calculates the i value and the total value of the sub-scanning area. Next, when actually scanning the document, DUPL is sent to the CPU printer.
After instructing EX M(Jl)E, a print command is sent to the first image recording section to form an image. Next, when the vertical synchronization request signal is returned from the first image recording section, the CPU in the reader sends a signal indicating that the main scanning direction is from the back side to the front side to the COD control control signal generation section 19. Start document scanning. Immediately after the start, the vertical synchronizing signal generated by the image leading edge signal is sent to all the first image recording sections, and at the same time, the video signal transmission starts. The document is then scanned, and when the value reaches 1 in the pre-recognized document sub-scanning area, the transmission of the vertical synchronizing signal and video is completely stopped.

The sub-scanning of the document continues and is stopped when it reaches a pack home position (not shown) located exactly opposite to the document reference. During this time, an image such as 26-6 is obtained at the time of discharge of the first image recording. This copy paper is reversed by the 8WIT CHB ACK operation in the paper handling section and then supplied to the second image recording section. On the other hand, on the reader side, after confirming that the recording switching signal from the image recording section becomes active, it starts monitoring the vertical synchronization request signal.

When this signal is confirmed, the CPU in the reader sends an instruction from the front to the back in the main scanning direction to the CCU control signal generation section 19, and also recognizes in advance 1 and 7 of a certain document sub-scanning area. The values and all values are converted to coordinate values from the back home position, and when this is completed, scanning starts from the pack home position to the home position, and when the coordinate point corresponding to the converted value of 100 is reached, the video is displayed. stop sending.

The sub-scanning of the document continues and stops when the home position is reached.

Through the above series of operations, a double-sided copy as shown in 26-7 is obtained on the stacker 8 in FIG. 19. $27
In the figure, the document is placed in a reverse left-right position as in the case of FIG. 26, and in this case, it is sufficient to change the timing of image output from the previous case.

[Effects] 1 As explained above, according to this invention, the image recording device is composed of a first image recording section, a second image recording section, and a paper handling section having a paper reversing function, and image editing is possible. Since the document reading device, which has a copy section and an operation section, is equipped with a document coordinate detection function, it is possible to perform high-speed, multiplex, double-sided copying and editing of normal images according to the layout of the document and the position of the binding margin.
The effect is that high-performance copying is achieved.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an embodiment of an image recording apparatus according to the present invention, FIG. 2 is a schematic diagram of the basic configuration of a paper handling section in the image recording apparatus, and FIGS. 3.4.5 are high-speed, high-speed, A system block diagram for multiplexing and double-sided copying; FIG. 6 is a system block diagram for copying different images independently; and FIG. 7 is a system block diagram of the control circuit of the image recording apparatus according to the present invention. 8 is a block diagram of the master controller/controller in the control circuit, FIG. 9 is a specific circuit diagram of the switching circuit 8-1, and FIG. 10 is a control program for the master controller. , FIG. 11 is a block diagram of the first image recording section controller system, FIG. 12 is a control program for the first image controller, FIG. 13 is a system block diagram of the second image recording section controller, and FIG. The cause is the control program of the second image recording unit controller, the first
FIG. 5 is a system block diagram of the paper handling section controller, and FIG. 16 is a control program for the paper handling section controller. Fig. 17 shows the original reading device connected to the image recording device, Fig. 18 is a cross-sectional view of the structure of the original reading device, and Fig. 19 shows the host controller/troller in the original reading device. FIG. 2 is a system block configuration diagram. Note that in the figure, the host controller corresponds to the part within the frame surrounded by solid lines. FIG. 20 is a diagram showing the original placed on the original table using coordinates. FIG. 21 is a block diagram of the circuit of the document coordinate recognition unit in FIG.
．． FIG. 27 is a diagram showing the direction of document reading scanning with respect to the state in which the document is placed on the document table, and the copying state resulting from the scanning. 1... Image recording device body 2...
...First image recording section 3...Second image recording section 4...Paper handling section 5...Second paper feed Section 6...Second paper feed section γ...First pusher 8...Second pusher 200...Photoreceptor 201. ...Mirror 202...Laser scanner 203...Paper supply passage 204...Transfer section 205...Fixing section 206...Paper delivery passage 207...First resistor 208...Image Recording position 209...Second paper fabric sensor 210...Second paper fabric sensor 402...Paper reversing section 409...Path switching claw 412...First solenoid 414...Lamp 415... Light receiving element 416... Reversing roller 417... Driven o-roller 421...
...Second solenoid 19-5...CCU
Control control signal generation section 19... Image data synthesis section 19-9... Document coordinate recognition section 19-11... DC motor 19-12... Drive circuit 19-13 ...Fluorescent lamp 19-14...Lighting circuit 1915...Hotset/su 21-5...Latch 21-9...Comparator Fig. 10-2 Fig. 20 ( )X2. Y+) ]3(X3.Y3) (X2.Y4) 24th factor Y Figure 27

Claims (1)

[Claims] An image recording device configured with a first image recording section, a second image recording section, and a paper handling section having a paper reversing function, and an original document that scans in the main scanning direction and the sub scanning direction to read the required number of documents. An image editing section and an operation section provided in the document reading device determine the main scanning direction in the document reading scan according to the position and arrangement of the binding margin of the document. , sub-scanning direction,
and an image copying machine that copies and edits normal images by switching the image output timing applied to the paper handling section in the image recording device.