JP2002162793A - Manuscript reading and recording method and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manuscript reading and recording device which can improve the processing time (Fcot) from the time when the manuscript has been taken in and read to the time when it is recorded on a recording paper. SOLUTION: An image memory 84 is contained in the control part of the manuscript reading and recording device, and the manuscript set in a paper feeding tray 9 with its face up is fed to a reading part 1 after reversing its front and back. At first, the back side of the manuscript is read, the image of the back side is temporarily recorded in the image memory 84, simultaneously a recording paper is fed to a recording part 2, the image is recorded on one side of the recording paper after reading out the image from the image memory 84, the face of the recording paper is reversed together with reversing the face of the manuscript. Next, the front side of the manuscript is read, the image of the front side is recorded in the image memory 84, simultaneously the recording paper is fed again to the recording part 2, the image is recorded on the other side of the recording paper after reading out the image from the image memory 84 and the recording paper is discharged to a paper ejection tray 5 with the other side down.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing technique of a document reading and recording apparatus for automatically feeding a document, reading both sides of the document, and recording the image on a recording sheet.

[0002]

2. Description of the Related Art In a conventional document reading and recording apparatus, when reading both sides of a document and recording the image on a recording sheet, a document set in a paper feed port with its front side up is fed to a reading section. First, the front side of the original is read from the leading end side, and the data is stored in the image memory.
Then, the original is switched back inversion, and is again fed to the reading unit while inverting its front and back surfaces through the return path. This time, the back surface is read from the terminal side before the switchback inversion. Further, after storing the data in the image memory, the printer is started up, and the recording paper first contains the data.
The image on the back side of the document was copied, and the image on the front side of the document was copied after the recording paper was turned upside down through the return path.

[0003]

However, in the conventional document reading and recording apparatus, since the image memory stores the image data of the front and back sides of the document, the capacity of the image memory becomes large, which is disadvantageous in cost. On the other hand, since the image on the back side of the document is recorded on the recording paper, the recording process cannot be performed until both the front and back surfaces of the document have been read, so that the processing time becomes long. Further, since the document read by the document reading / recording device is discharged to the paper discharge tray with the front side facing upward, if a plurality of documents are sequentially read as it is, for example, the first page which is the first page The discharged document is not in page order such that the back side of the second document, which is the fourth page, is placed on the front surface of the document, and the user must re-align the discharged document.

[Means for Solving the Problems]

[0004] In order to solve the problems described above, the present invention
The following means are used. That is, a reading unit capable of reading both sides of a document,
In a document reading and recording apparatus provided with a recording unit for recording the read image, the document set in the sheet feeding unit with the front side upside down is fed to the reading unit after turning over, and first, the back of the document is turned over. In parallel with this, the image on the back side is recorded on one side of the recording sheet, and the front and back sides of the document are reversed, and the front and back sides of the recording sheet are reversed, and then the front side of the document is read. In parallel with this, an image on the front side is recorded on the other side of the recording paper.

According to a second aspect of the present invention, in a document reading and recording apparatus provided with a reading section capable of reading both sides of a document and a recording section for recording the read image, a control section of the document reading and recording apparatus is provided. After reversing the original set in the paper feed section with the image memory built in and the front side up,
The document is fed to the reading unit, first, the back side of the document is read, the image on the back side is temporarily read into the image memory, and in parallel with this, the image is read out from the image memory and recorded on one side of the recording paper. Then, the front and back sides of the document are reversed, and the front and back sides of the recording paper are reversed. Then, the front side of the document is read, and the image on the front side is read into the image memory. The data is read from the image memory and recorded on the other surface of the recording paper.

According to a third aspect of the present invention, in the document reading and recording apparatus, the recording sheet set in the supply section is fed to the recording section, and an image of the back side of the document is recorded on one surface thereof. Feed the paper again to the recording unit while turning over the paper,
An image of the surface of the document is recorded on the other side, and the document is discharged to the sheet discharge section with the other side down.

BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a copy / reader employing a document reading / recording device.
FIG. 2 is a side sectional view of the same facsimile machine, FIG. 3 is a side sectional view of a reading unit, FIG. 4 is a block diagram showing a control configuration of a document reading and recording apparatus according to the present invention, and FIG. FIG. 6 is a side cross-sectional view of the reading unit showing the state of conveyance.
FIG. 7 is a side sectional view of a recording unit showing a state of conveyance of a recording sheet, FIG. 7 is a flowchart showing an outline of a control configuration of the original reading and recording apparatus according to the present invention, and FIG. 8 is a control configuration of the original reading and recording apparatus according to the present invention. 9 is a flowchart showing a second stage, FIG. 10 is a flowchart showing a third stage, and FIG.
11 is a flowchart showing the fourth stage, FIG. 12 is a flowchart showing the fifth stage, and FIG. 13 is a flowchart showing the final stage.

A document reading and recording apparatus according to the present invention
An embodiment of the present invention will be described using a facsimile multifunction peripheral as an example. As shown in FIGS. 1 and 2, the copy / facsimile multifunction peripheral includes a reading unit 1, a recording unit 2, an operation unit 3, a display unit 4, and the like. The reading unit 1 is arranged above the recording unit 2. A key panel 13 is extended from one side of the reading unit 1, and an operation unit 3 such as a function key 16, a start button 17, a stop button 18 and a display unit 4 including a liquid crystal panel are provided thereon. Are located.

First, the reading section 1 of the copy / facsimile multifunction peripheral will be described. In the reading unit 1, the reading device 6 is housed in a reading case 10, and the reading case 10
A transparent stationary document placing bed 11 is disposed on the upper surface of the document. The reading device 6 scans the original placed on the stationary original placing bed 11 by moving from the solid line position to the virtual line position in FIG.

A document holding cover 7 is provided above the reading case 10 so as to be openable and closable with one side thereof as a center. The document holding cover 7 can hold a document placed on a stationary document loading bed 11. Press from above. An ADF 8 is attached to one end of the document holding cover 7.
So that it is connected to the paper feed port 8a of the ADF 8,
A document supply tray 9 is provided above the document pressing cover 7, and an A
A document discharge tray 7c is formed integrally with the DF 8 so as to be connected to a paper discharge port 8b disposed immediately below the paper feed port 8a.

Sheet documents stacked on the document supply tray 9 are picked up one by one and taken in from a paper feed port 8a. The document fed by the ADF 8 and passing over the platen glass 12 is read by the reading device 6 at the home position indicated by a solid line in FIG.

At this time, the reading device 6 illuminates the reading surface of the sheet document with an exposure lamp, and reflects the reflected light from the document via a scanning mirror and a lens to an image pickup device (hereinafter referred to as “CC”).
D "). The brightness of the reading surface is classified based on the amount of the reflected light, the brightness is converted into an electric signal by the CCD, and the data is stored in the image memory 84 shown in FIG. When a plurality of document images are recorded, the data is encoded and stored in the image memory 83. Then, the read document is discharged from the paper discharge port 8b onto the document discharge tray 7c.

Here, the internal structure of the ADF 8 will be described. In this description, in the side view shown in FIG. 3, the document transport direction is the front-rear direction (the paper feed path 8a / discharge port 8b side is forward in the document transport path, and the curved portion (transport direction turning back portion) side is rearward. ), And the orthogonal direction in the horizontal direction is defined as the left-right direction.

First, the configuration of the document transport path in the ADF 8 will be described. As shown in FIG. 3, a main document transport path R <b> 1 is formed from the paper feed port 8 a to the paper discharge port 8 b in a shape in which the letter “” is turned left and right as viewed from the side. At the time of single-sided reading, the sheet document passes through the main document transport path R1, and the reading process is performed.

A temporary discharge port 8c is provided directly above the paper discharge port 8b, and the main document conveyance path R1 is connected to the paper discharge port 8b.
a, and from the branch point P, the temporary outlet 8c
, A "C" -shaped inversion path R2 is formed in a side view. Immediately after the temporary discharge port 8c, the reversing path R2 is branched, a document return path R3 is extended backward from the branch point Q, and communicated with the curved portion of the main document transport path R1. I have. Further, the main document transport path R1 is branched behind the paper discharge port 8b, and a bypass path R4 is formed upward and backward from the branch point T. The bypass path R4 is communicated with the document return path R3 at a front and rear intermediate position. I have. Here, the point of communication between the main document transport path R1 and the document return path R3 is a junction point S, and the point of communication between the document return path R3 and the bypass path R4 is a junction point R.

At the time of double-sided reading, the sheet original is turned upside down by this inversion path R2, and then the original return path R
3. The document is fed to the main document transport path R1 and the bypass path R4 in a predetermined flow, and the reading process of both sides is performed.

Next, as for the arrangement of rollers for feeding the sheet document, an extra roller 26 which can be rotated forward and reverse is disposed between the temporary discharge port 8c and the discharge port 8b, and slides up and down. A first press roller 27 and a second press roller 28 are provided so as to be in contact with each other. Here, these sliding contact portions are referred to as a nip portion C and a nip portion G in order.

The second press roller 29 is configured to be vertically movable by an actuator (not shown) constituted by a solenoid or the like, and separates the second press roller 29 from the extra roller 26 at a predetermined timing. Control.

A nip portion A between the separate roller 22 and the retard roller 23 is provided near the paper feed port 8a, and the arms 20 and 20 swing forward from both ends of the separate roller 22. The arm 20 is movably disposed, and a pickup roller 21 is supported at the front end of the arms 20.

A nip portion B of the take-in rollers 24 and 25 is provided at an intermediate position between the nip portion A and the branch point P.

Further, on the platen glass 12,
A feed roller 28 having a diameter larger than that of the other rollers is provided, and is surrounded by the curved portion of the main document transport path R1 and the document return path R3. Along the feed roller 28, the first slave roller 31 slides above, the second slave roller 32 slides behind it, and the third slave roller 33 slides obliquely forward. . Here, the respective sliding contact points are sequentially arranged in the nip portion D,
A nip portion E and a nip portion F are used.

Of the rollers described above, rollers 22 and 23
25, 26, and 28 are drive rollers, and rollers 24, 27, 29, 31, 32, 33 that come into contact with each other
Are driven rollers that follow each drive roller.
It is necessary to switch the rotation direction of the extra roller 26 at a predetermined timing in order to appropriately switch the conveyance direction of the sheet original. A forward / reverse rotation switching mechanism is provided between the driving source and the extra roller 26. Is provided, and receives a control signal (switching signal) from the main control unit 80 (see FIG. 4) to perform switching.

An outline of an example of the mechanism is as follows: a drive shaft to which power from the drive source is transmitted;
6 and an output shaft for outputting to the roller shaft 26a, one is provided with a same-direction transmission mechanism for transmitting rotation in the same direction as the drive shaft, and the other is provided with a reverse rotation transmission mechanism for transmitting the rotation in the reverse direction. Then, an electromagnetic clutch or the like spline-fitted to the drive shaft or the output shaft is slid and displaced, the connection with one transmission mechanism is released, and the other transmission mechanism is connected. Only one rotation is taken out to the output shaft.

Further, as for the driving source, a pulse is sequentially applied to the multi-phase winding of the stator, and a step motor or the like in which the rotor rotates by a fixed angle for each pulse is used. The number of rotation steps is measured, and the main control unit 80 performs step control.

Next, a description will be given of switching of the sheet document conveyance direction. The first guide member 3 is located near the branch point P.
An actuator such as a solenoid is attached to the rotation fulcrum shaft 37a, thereby electrically switching the first guide member 37 to transfer the sheet document to the main document transport path R1 or the reversing path R2. Guide to one of them.

Normally, the first guide member 37 is connected to the reverse path R2.
When the control signal (switching signal) from the main control unit 80 is received, a current flows through the solenoid, the actuator operates, and the first guide member is closed. 37 rotates slightly upward to close the main document transport path R1 and open the reversing path R2.

A second guide member 38 is attached to the roller shaft 27a of the first press roller 27. Like the first guide member 37, a solenoid or the like is attached to the roller shaft 27a, which is a rotation fulcrum shaft. The second guide member 38 is electrically switched to open or shut off the reversing path R2.

Normally, the second guide member 38 is connected to the reverse path R2.
When a control signal (switching signal) from the main control unit 80 is received, a current flows through the solenoid, and the actuator operates to operate the second guide member 38.
The sheet document that has been rotated slightly downward to shut off the reversing path R2 and switchback reversed while nipping the end of the sheet document at the nip portion C is moved along the lower surface of the second guide member 38 to the document returning path. You will be guided to R3.

Further, a third guide member 39 is disposed near the branch point T. Here, the third guide member 39 is provided.
Use a flexible member such as a film to open the path according to the direction of conveyance of the sheet document, and after passing the sheet document, return to its original position due to its own weight and its elasticity, and close the path. Make up.

More specifically, the third guide member 39 is normally provided with a bypass path R from the nip portion G to the junction R.
4 is closed to block the path of the main document transport path R1 from the nip portion G to the nip portion F. However, nip F
When the sheet is conveyed in the reverse direction from the nip portion G to the nip portion G, the leading end of the sheet document pushes up the third guide member 39 and the path
1 is opened, and is conveyed as it is to the paper discharge port 8b. Then, when the end of the sheet document passes through the position of the branch point T, the third guide member 39 returns to its original position by its own weight and its elasticity. The sheet document whose back is reversed is guided to the bypass path R4 along the upper surface of the third guide member 39.

Next, each sensor related to the conveyance of the sheet document will be described. First, a document set sensor (hereinafter referred to as "DS") is provided near the paper feed port 8a of the main document transport path R1.
Sensors ") 34 are provided. When a sheet document is set in the paper feed port 8a, the sheet is detected by the DS sensor 34, whereby the circuit between the start button 19 and the driving source is connected, and the driving source can be driven. Conversely, if no original is set,
Even if the start button 19 is pressed while the circuit is shut off, the drive source does not start, thus preventing the document from being fed idly.

Are arranged side by side in the left-right direction along the main document transport path R1, thereby detecting the document width of the sheet document set in the paper feed port 8a. Further, at the time of taking in the sheet document, the DS sensor 34 detects the start of passage at the leading end and the end of passage at the end thereof, and counts the number of rotation steps of the drive source during the passage. The document length is calculated. Thereby, the size of the taken sheet document is determined, and the size of the recording paper is determined.

A first position detection sensor 35 is disposed near the temporary discharge port 8c of the reversing path R2, and a second position detection sensor 36 is disposed near the junction S of the main document conveyance path R3. Have been.

Each of the sensors 34, 35, and 36 is constituted by an optical sensor having a light emitting element arranged on one side of the transport path and a light receiving element arranged on the other side, or a limit switch. When the passage of a sheet document passing the position is started or completed, the control signal (detection signal) is output to the main control unit 80.

Further, the main control unit 80 is also connected to control members such as the pickup roller 21 and the separate roller 22, and the main control unit 80 controls the conveyance of the original in the reading unit 1.

Next, the recording section 2 of the copy / facsimile MFP will be described. As shown in FIG. 2, in the recording unit 2, the recording device 70 and the sheet cassette 50.
Each of the paper cassettes 50 accommodates a different size of recording paper.

The recording device 70 and each of the sheet cassettes 50 and 5
0 are communicated with each other by a paper take-in path r1 extending in the vertical direction, and are stacked on the upper end portions of the paper feed tables 51 that are inclined obliquely upward in each paper feed cassette 50. Paper feed rollers 52 and 53 for feeding the recording paper one by one toward the recording device 70 are provided. The paper feed tables 51, 51 are urged by springs or the like from below, and the recording sheets stacked on the paper feed tables 51, 51 are always in contact with the paper feed rollers 52, 53.

The recording device 70 includes a photosensitive drum 71 on which selenium or the like as a photoconductor is deposited, a charger 72 for uniformly charging the surface of the photosensitive drum 71 to a predetermined potential, and an image forming device on the photosensitive drum 71. Exposure device 73 that forms an electrostatic latent image of
And a developing device 74 that supplies toner to the electrostatic latent image on the photosensitive drum 71 to visualize the latent image, and the photosensitive drum 71, the charging device 72, the exposing device 73, and the developing device 74 An annular transport path r2 is formed so as to surround it. The paper take-in path r1 communicates at a junction V below the annular transport path r2, and branches off a sheet discharge path r3 at a branch point W above the annular transport path r2. It communicates with the space.

Along the annular transport path r2, a junction V
A nip portion H of the first feed rollers 54 and 55 is provided immediately above the transfer roller 75. A transfer device 75 for transferring the toner image from the photosensitive drum 71 to the recording paper is provided above the nip portion H. Above this, nip portions I of fixing rollers 56 and 57 for heating and fixing the toner image on the recording paper are provided.

A distributing member 67 is disposed near the branch point W, and further along the annular transport path r2, a nip portion J of the second feed rollers 58 and 59 and a nip portion of the third feed rollers 60 and 61. A paper discharge port 5 to the discharge tray 5 is provided along the paper discharge path r3.
A nip portion L of the discharge rollers 62 and 63 is disposed near “a”.

A flexible member such as a film is used for the distributing member 67, and a path is opened in the transport direction of the recording sheet. After the recording sheet passes, the path returns to its original position due to its elasticity. It is configured to close. More specifically, the distribution member 67 normally opens the path from the nip L to the nip J, and blocks the path from the nip L to the nip I. However, in the conveyance from the nip portion I to the nip portion L, the leading end of the recording sheet pushes down the distribution member 67 to open the path, and is conveyed to the sheet discharge port 5a as it is. When the end of the recording sheet passes through the branch point W, the distribution member 67 returns to its original position due to its elasticity, and the nip portion L
The recording paper that has been switched back in the step
Along the lower surface of the nip portion J.

Of the rollers described above, rollers 52 and 53
Reference numerals 54, 56, 58, 60, and 62 denote drive rollers, and rollers 55, 57, 59.6, and 6
Reference numerals 1 and 63 denote driven rollers that rotate with each drive roller. In addition, regarding the discharge roller 62, in order to appropriately switch the conveyance direction of the recording paper, at a predetermined timing,
It is necessary to switch the rotation direction. Like the extra roller 26 of the reading unit 1, a forward / reverse rotation switching mechanism is provided between the drive source and the discharge roller 62, and a control signal from the main control unit 80 is provided. (Switching signal) is received and the switching is performed.

Further, between the convergence point V of the annular transport path r2 and the nip portion H of the first feed rollers 54 and 55,
A first passage detection sensor 76 is provided, and a branch point W of the sheet discharge path r3 and a nip portion L of the discharge rollers 62 and 63 are provided.
, A second passage detection sensor 77 is provided.

Each of the sensors 76 and 77 is constituted by an optical sensor having a light emitting element arranged on one side of the transport path and a light receiving element arranged on the other side, or a limit switch. When the passage of the recording paper passing therethrough is started or completed, a control signal (detection signal) is output to the main control unit 80. Further, the main control unit 80 includes paper feed rollers 52.5.
The main control unit 80 controls the mark conveyance of the recording unit 2.

Next, the control section of the copy / facsimile MFP will be described. In the block diagram shown in FIG.
80 is a main control unit, 1 is a reading unit, 2 is a recording unit, 3 is an operation unit, 4 is a display unit, 81 is an NCU, 82 is a modem, 83 is an image memory, 84 is an image memory, 85 is a RAM, 8
6 is a ROM and 87 is a bus.

The main control unit 80 controls the entire apparatus, and operates each unit in a series of flow to realize a document transmission / reception function, a copy function, and the like. In particular, when reading an image from the ADF 8 of the reading unit 1 in a transmission function, a copy function, or the like,
The document size is determined by the DS sensor 34 described above. Then, based on the determined document size, the transmission size and the size of the recording paper used in the recording device 70 are determined,
Transmission or recording is performed using the determined transmission size or recording paper.

The reading unit 1 reads an image to be transmitted or copied from a document, and the recording unit 2 forms a received image or an image read by the reading unit 1 on recording paper. The operation unit 3 is used when the user performs various settings and instructions. For example, the function key 16 can be used to select a transmission function, a copy function such as switching between single-sided / double-sided copy, and an instruction to execute the selected function. The transmission of the sheet document or the copying process is started by operating the start button 17, and the process is stopped halfway by operating the stop button 18. The display unit 4 can display various information such as a message to the user, a message indicating the state of the apparatus, and operation guidance.

The NCU 81 controls a line to communicate with an external device. When transmitting an image, for example, the DS sensor 3
4 can be performed based on the transmission size determined by the main control unit 80 in accordance with the detection result by the control unit 4 The modem 82 modulates and demodulates image data to be transmitted and received. The image memory 83
It stores image data to be transmitted and received, image data read by the reading unit 1, image data to be recorded by the recording device 70, and other image data being processed. The image memory 84 has a smaller capacity than the image memory 83 and is mainly used for temporarily storing image data. In particular, in the present invention, the image memory 84 reads and stores image data of one side of a sheet original and the other side. Before reading the other side, the image data is read out and recorded on a recording sheet.

The RAM 85 is used when it is necessary to save data in the processing of the main control unit 80 and other units.
The ROM 86 stores a program that defines the operation of the main control unit 80, fixed data, and the like. The data or the like used when the main control unit 80 determines the document size by the DS sensor 34 is stored in the RAM 85 or the ROM 86.
Can be stored. The bus 87 is connected to the main control unit 8
0, reading unit 1, recording unit 2, operation unit 3, display unit 4, NCU
81, modem 82, image memory 83, image memory 8
4, RAM85, ROM86, etc. are interconnected,
Data transfer between them is enabled.

Next, a reading process and a recording process of the copy / facsimile multifunction peripheral will be described. First, the flow of a sheet document during the reading process will be described with reference to FIG.

As shown in FIG. 5A, a sheet document set on the document feed tray 9 with its surface facing up is
First, before the reading process, the paper feed port 8a → the nip portion A →
The sheet is conveyed to the nip portion B → the branch point P → the branch point Q → the nip portion C → the temporary discharge port 8c to reverse the front and back sides of the sheet document. At the temporary discharge port 8c, the back side of the document is turned upward, and here, the sheet document is switched back. next,
As shown by (b) in the figure, in the first stage of the reading process, the temporary discharge port 8c → the nip C → the junction Q → the junction R → the nip D → the junction S → the nip E → the platen glass. 12 →
The document is conveyed to the nip portion F → the branch point T → the nip portion G → the paper discharge port 8b, and first, the back side of the document is read. In this first stage, the front and back surfaces of the sheet document are also reversed, and the front surface of the document is turned up at the discharge port 8b. Here, the sheet document is again switched back. Then, as shown at (c) in the figure, in the second stage, the paper discharge port 8b → the nip portion G
→ Junction point T → Junction R → Nip D → Junction S → Nip E → Platen glass 12 → Nip F → Junction T → Nip G → Discharge port 8b Reading is performed. Also in this second stage, the front and back surfaces of the sheet document are reversed, and the front surface of the sheet document discharged to the discharge tray 7c is downward.

According to the present invention, the back side of the document is read, the image is recorded on one side of the recording sheet, and then the front side is read, and the image is recorded on the other side of the recording sheet. Hereinafter, the flow of the recording paper during the recording process will be described with reference to FIG. Here, one side of the recording paper on which the image on the back side of the document is recorded is defined as the back side, and the other side of the recording paper is defined as the front side, with respect to the plain recording paper on both sides.

As shown in FIG. 6A, the recording paper taken out of the paper feed table 51 is firstly subjected to a confluence point V → nip portion H → transfer device 75 → nip portion in the first stage of the recording process. I →
The sheet is conveyed to the branch point W → the nip L → the sheet discharge port 5a, and the image data of the back side of the sheet document is recorded. After the completion of the first stage, the recording paper is switch-back reversed. At this time, the front and back surfaces of the recording paper are reversed, that is, the surface opposite to the previous one faces the photosensitive drum 71. Then, as shown at (b) in the figure, in the second stage, the recording paper is discharged from the discharge port 5a → nip portion L → branch point W → nip portion J → nip portion K → junction point V → nip Section H → Transfer unit 75
→ Nip portion I → Branch point W → Nip portion L → Conveyed to discharge port 5a, where image data on the front side of the sheet document is recorded,
The paper is discharged to the discharge tray 5 with its surface facing down.

Here, the recording process will be briefly described. The image data read by the reading section 1 is temporarily stored in the image memory 84, and the image data is read out from the image memory 84 and read out by the exposure device 73. Output to The exposing device 73 converts the image data into laser light and exposes the surface of the rotating photosensitive drum 71 to light.

When the photoconductor of the photosensitive drum 71, which is positively charged by the charger 72, is irradiated with the laser beam, the positive charge escapes only at the irradiated portion.
On the other hand, a portion not irradiated with the laser light remains positively charged. Here, the black portion of the sheet document such as a character or a picture corresponds to the portion where the electric charge remains, and the white portion such as the background corresponds to the portion where the electric charge has been removed.

Then, the photosensitive drum 71 is
When the toner is sprinkled on the surface, the toner is negatively charged, so that the toner adheres only to the portion where the positive charge remains, and the positively charged recording paper is conveyed there. Then, the toner is pressed by the transfer device 75, and a copy of the toner is formed on a recording sheet. Finally, the recording paper is fed while being heated by the fixing rollers 56 and 57, whereby the toner is melted and the copied picture is fixed on the recording paper, and then fed to the discharge tray 5 by the discharge rollers 62 and 63.

Next, the control configuration of the copy / facsimile multifunction peripheral will be described with reference to FIG. 7 showing the overall flow, and the details thereof will be described with reference to the flowcharts shown in FIGS. As shown in FIG. 8, first, the user sets a sheet document on the document feed tray 9 with the front side facing upward, and inserts it deep into the paper feed port 8a while aligning it with the document guide. The document is detected by the DS sensor 34, whereby the document can be taken in, and the standby state is established.
4, the width of the sheet document is detected (step S1).

Next, the user operates the function keys 18 on the key panel 13 to select the original reading surface in the double-sided reading mode (step S2). Then, as shown in FIG. The members 37 and 38 are both set at the upper position (step S3), that is, the first guide member 37 cuts off the main document conveying path R1 to open the reversing path R2, and the second guide member 38 opens the reversing path R2. I do.

When the user presses the start button 19 (step S4), the pickup roller 2
1, only the uppermost sheet document is separated by the separate roller 22, the retard roller 23, etc.
Is fed by the take-up rollers 24 and 25 and guided to the second document transport path R2 (step S2).
5).

At this time, the DS sensor 34
The start of the passage of the leading end of the sheet document and the end of the passage of the trailing end thereof are detected, whereby the number of rotation steps of the drive source therebetween is counted, and the length of the document is calculated. The size of the conveyed sheet document is specified by the width of the sheet document.

Then, the sheet document is temporarily sent from the temporary discharge port 8c to the space on the discharge tray 7c by the extra roller 26 and the first press roller 27.
When the passage of the end of the sheet document is detected by the first position detection sensor 35 (step S6), the end of the sheet document is moved from the position of the first position detection sensor 35 to an intermediate point between the branch point Q and the nip portion C by the counter. The number of rotation steps (first number of rotation steps) corresponding to the distance conveyed to the position is measured. After reaching the first number of rotation steps (step S7), most of the sheet document is discharged from the temporary discharge port 8c, and only the end portion thereof is nipped by the extra roller 26 and the first press roller 27. In this state, at this moment, the second guide member 38 is switched to the lower position (step S8) to block the reversing path R2 and to rotate the extra roller 26 in the reverse direction (in the side view in FIG. Clockwise) (step S
9), the sheet document is switchback inverted and guided to the document return path R3.

Next, the sheet original is fed to the feed roller 2.
8 and the first slave roller 31,
As shown in (2), when the leading end (the end before the switchback reversal) is detected by the second position detecting sensor 36 (step S10), the leading end of the sheet document is moved from the position of the second position detecting sensor 36 by the counter. The number of rotation steps (second number of rotation steps) corresponding to the distance conveyed to the rear end position of the platen glass 12 is measured, and after reaching the second number of rotation steps (step S11), first, Reading of the back surface is started (step S12).

In parallel with this, the image on the back side of the document read by the CCD is such that black pixels such as characters and pictures and white pixels such as the background have electric signals (ON / OF).
F signal) and sequentially output to the image memory 84, where it is temporarily stored (step S1).
3).

When the end of the conveyed sheet original passes through the position of the second position detecting sensor 36 (step S14), the end of the sheet original is moved from the position of the second position detecting sensor 36 to the platen glass 12 by a counter. The number of rotation steps (the third number of rotation steps) corresponding to the distance conveyed to the front end position, and the end of the sheet document is set at the branch point T and the nip portion G from the position of the second position detection sensor 36.
The number of rotation steps (fourth rotation step number) corresponding to the distance to be conveyed to the intermediate position is measured, and after reaching the third rotation step number (step S15), reading of the back side of the sheet document is performed. The process ends (step S16).

At this time, all the image data of the back side of the sheet document has been read into the image memory 84, and as shown in FIG.
Recording paper is taken in from the paper supply cassette 50 (step S17). After the size of the sheet document is specified, the optimum size of the recording paper is automatically determined, and the paper cassette 50 is selected accordingly.

The recording paper taken in by the paper feed roller 52 (or 53) is fed to the first feed roller 54.
The conveyance is inherited by 56 and is fed upward as it is. When the passage of the leading end is detected by the first passage detection sensor 76 (step S18), the image data on the back side of the sheet document is stored in the image memory 84. (Step S19), and is copied onto the recording sheet by the recording device 70 (Step S20).

When the leading edge of the recording paper is pushed down by the sorting member 67 and conveyed in the direction of the paper discharge port 5a, and the passage at the end is detected by the second passage detecting sensor 77 (step S21), Most of the recording paper is the paper exit 5a
From the discharge rollers 62 and 63
The discharge roller 62 is rotated in the reverse direction (clockwise in the side view of FIG. 6B) in a state where the nip is nipped (step S22). As a result, the recording paper is switched back, and is guided in the nip J direction by the distribution member 67 that has returned to the original position.

At this time, the leading end of the recording paper (the end before the switchback reversal) is set in the second position by the counter.
The number of rotation steps (fifth rotation step number) corresponding to the distance conveyed from the position of the passage detection sensor 77 to the intermediate position between the nip portion B and the branch point V was measured, and reached the fifth rotation step number. Thereafter (step S23), the conveyance of the recording paper is temporarily stopped, and the apparatus stands by until reading the front side of the sheet document (step S24).

On the other hand, during this time, the sheet document is further conveyed further downstream in the reading section 1 while pushing up the third guide member 39, and as shown in FIG. Is detected (step S25), most of the sheet document is discharged from the paper discharge port 8b, and only the end portion thereof is nipped by the extra roller 26 and the second press roller 29. Is stopped (step S26), and the second guide member 38 is switched to the upper position (step S2).
7).

Here, if the DS sensor 34 is turned on and a sheet document to be taken next into the paper feed port 8a is detected (step S28), the pickup roller 2
1, only the next uppermost sheet document (hereinafter, "next sheet document") is separated by the separate roller 22, the retard roller 23, and the like, and is taken into the document transport path from the paper feed port 8a (step S29). Then, the extra roller 26 starts rotating in the normal rotation direction (clockwise in the side view of FIG. 5C) (step S30). On the other hand, when the DS sensor 34 is turned off and there is no next sheet document in the paper feed port 8a (step S28), the pickup roller 21 and the separate roller 22 are not driven, and only the extra roller 26 rotates in the normal rotation direction. (Step S
30).

With the start of the normal rotation of the extra roller 26 in the step S30, the previously taken sheet document (hereinafter referred to as "the previous sheet document") is also switched back and conveyed in the reverse direction to return to the original position. After being returned to the fourth document transport path R4 by the returned third guide member 39, the transport is passed on to the feed roller 28 and the first slave roller 31. Then, the leading end of the preceding sheet document (the end before the second switchback reversal, that is,
When the second position detection sensor 36 detects that the leading end when the paper is set in the paper feed port 8a is again in the traveling direction (step S31), the second press roller 29 descends and the extra roller 26 The second press roller 29 is separated from the second press roller 29 (step S32). At this time, when the step control of the drive source is started and the second rotational step number is reached as shown in FIG. Step S3
3), reading of the front side of the preceding sheet document is started (step S34).

At the same time, the image on the front side of the document read by the CCD is converted into an electric signal and sequentially output to the image memory 84, where it is temporarily stored (step S35).

The further original sheet conveyed is
When the end of the sheet passes through the position of the second position detection sensor 36 (step S36), the third rotation step number is counted by a counter, and the end of the preceding sheet document is shifted from the position of the second position detection sensor 36 to the discharge port 8b. The number of rotation steps (sixth rotation step number) corresponding to the distance conveyed to the position is measured, and after reaching the third rotation step number (step S37), reading of the front side of the preceding sheet document is performed. The process ends (step S38).

At this time, the image memory 84 stores all the image data of the front surface of the original sheet. Here, the image data of the nip portion K and the branch point V of the annular conveyance path r2 of the recording section 2 is stored. The conveyance of the recording paper which has been stopped in between is restarted (step S39). Then, the recording paper is fed into the first feed rollers 54 and 56, and as shown in FIG. 13, when the first passage detection sensor 76 detects the passage of the leading end (step S40), the first passage is detected. The image data on the surface of the sheet document is stored in the image memory 84.
From the storage device 70 (step S41).
Is copied on the surface of the recording paper (step S4).
2).

On the other hand, during this time, in the reading section 1, the preceding sheet document is pushed up the third guide member 39, and is discharged from the paper discharge port 8b while rubbing between the extra roller 26 and the second press roller 29 which are separated. (Step S4
3). The surface of the sheet document discharged to the discharge tray 7c is downward.

After the sixth rotation step number is measured by the counter (step S44), the second rotation step number is set.
The press roller 29 is raised and brought into contact with the extra roller 26 again (step S45).

In the recording section 2, the recording sheet is guided to the sheet discharge path r3 by pushing down the distribution member 67.
The paper is fed to the discharge rollers 62 and 63 and is discharged from the paper discharge port 5a (step S46). In addition, this discharge tray 5
The recording paper discharged to the printer has a surface on which the front side of the sheet document is copied, that is, the front side is down.

Here, if the next sheet document has been taken in (step S47), the next sheet document is
According to the flow from step S6, the reading / recording process is performed similarly to the previous sheet document. On the other hand, if there is no next sheet document in step S28 and it is not loaded (step S47), the flow is terminated here.

The reading and recording process is performed according to the above flow, thereby improving the processing speed of the document reading and recording apparatus. In particular, the first document is read and recorded on a recording sheet. Fcot (F
The first copy output time is improved.

In the present invention, first, after reading from the back side of the sheet document, the image is stored in the image memory 8.
4 and read the image from the image memory 84 and record it on the back side of the recording paper before reading the front side, then read the front side of the sheet document and read the image into the image memory 84; Before reading the back side of the sheet original, the image is read from the image memory 84 and recorded on the front side of the recording paper.
The capacity of the image memory 84 is sufficient for one page of the document.
It is possible to use a memory that is less expensive than in the past, and to reduce costs.

Further, in this configuration, when reading and recording a plurality of sheet documents, the sheet documents discharged to the discharge tray 7c are stacked in the page order of the documents set on the paper feed tray 9. At the same time, after the recording process is completed, the recording paper discharged to the discharge tray 5 is also stacked in the page order, so that the user has trouble re-arranging the sheet document and the recording paper after the reading and recording processing. However, work efficiency can be improved.

[0082]

As described above, the present invention has the following advantages. That is, claim 1
In a document reading / recording apparatus having a reading unit capable of reading both sides of a document and a recording unit for recording the read image, a document set in a paper feeding unit with the front side facing up,
After reversing the front and back, the document is fed to the reading unit. First, the back side of the document is read, and in parallel with this, the image of the back side is recorded on one side of the recording paper, and the front and back sides of the document are reversed. To improve the processing speed by reversing the front and back surfaces of the recording paper, then reading the front surface of the document, and recording an image of the front surface on the other surface of the recording paper in parallel with the reading. In particular, F is the processing time from when the first original is read and read until it is recorded on recording paper.
cot (First copy output tim
e) can be improved.

According to a second aspect of the present invention, in a document reading / recording apparatus provided with a reading section capable of reading both sides of a document and a recording section for recording the read image, a control section of the document reading / recording apparatus is provided. After reversing the original set in the paper feed section with the image memory built in and the front side up,
The document is fed to the reading unit, first, the back side of the document is read, the image on the back side is temporarily read into the image memory, and in parallel with this, the image is read out from the image memory and recorded on one side of the recording paper. Then, the front and back sides of the original are reversed, and the front and back sides of the recording paper are also reversed. Then, the front side of the original is read, and the image on the front side is read into the image memory. Since the image data is read out from the image memory and recorded on the other side of the recording paper, the capacity of the image memory may be one page of the document, and the memory can be configured with a cheaper memory than the conventional one, and the cost can be reduced. .

According to a third aspect of the present invention, in the original reading and recording apparatus according to the first aspect, the recording paper set in the supply section is fed to the recording section, and an image of the back surface of the original is recorded on one surface thereof. Then, the recording sheet is fed back to the recording section while being reversed, an image of the document surface is recorded on the other side, and the other side is discharged to the discharge section, whereby a plurality of sheets are discharged. When the document is processed and discharged, the originals set in the paper feeder are stacked in the page order,
The scanned original is also ejected with its front side down, and the sequentially ejected originals are also stacked in the page order,
Therefore, the user does not need to re-arrange the paper and the original, and can improve the work efficiency.

[Brief description of the drawings]

FIG. 1 is a perspective view of a copy / facsimile multifunction peripheral employing a document reading and recording apparatus.

FIG. 2 is a side sectional view of the same.

FIG. 3 is a side sectional view of a reading unit.

FIG. 4 is a block diagram showing a control configuration of a document reading and recording apparatus according to the present invention.

FIG. 5 is a side cross-sectional view of a reading unit showing a state of conveying a sheet document.

FIG. 6 is a side cross-sectional view of a recording unit illustrating a state of conveyance of a recording sheet.

FIG. 7 is a flowchart schematically showing a control configuration of the document reading and recording apparatus according to the present invention.

FIG. 8 is a flowchart showing a first stage of the control configuration of the document reading and recording apparatus according to the present invention.

FIG. 9 is a flowchart showing a second stage.

FIG. 10 is a flowchart showing a third stage.

FIG. 11 is a flowchart showing a fourth stage.

FIG. 12 is a flowchart showing a fifth stage.

FIG. 13 is a flowchart showing the same final stage.

[Explanation of symbols]

 Reference Signs List 1 reading unit 2 recording unit 5 discharge tray 7c discharge tray 8 ADF 9 paper feed tray 80 main control unit 84 image memory R1 main document transport route R2 inversion route R3 document return route R4 bypass route r1 paper take-in route r2 annular transport route r3 Paper discharge path

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 1/00 108 H04N 1/00 108Q 5C062 G03G 21/00 372 F term (Reference) 2H027 ED06 ED11 ED13 ED16 ED19 EE02 FA12 FA13 FA22 FB05 FD08 2H028 BA03 BA09 BB04 2H076 AA04 AA07 AA58 BA24 BA36 BA42 BA47 BA58 BA63 BA83 3F053 BA03 BA12 BA14 EA03 EB01 EB04 EC02 ED15 LA01 LB02 3F100 AA03 BA05 CA11 AC06 AC11 DA11

Claims (3)

[Claims] A reading unit capable of reading both sides of a document;
In a document reading and recording apparatus provided with a recording unit for recording the read image, the document set in the sheet feeding unit with the front side upside down is fed to the reading unit after turning over, and first, the back of the document is turned over. In parallel with this, the image on the back side is recorded on one side of the recording sheet, and the front and back sides of the document are reversed, and the front and back sides of the recording sheet are reversed, and then the front side of the document is read. A reading and recording method for a document reading and recording apparatus, wherein an image on the front side is recorded on the other side of the recording paper in parallel with the recording. 2. A reading unit capable of reading both sides of a document,
A document reading / recording apparatus having a recording unit for recording the read image, wherein the control unit of the document reading / recording apparatus has an image memory built-in, and the document set in the sheet feeding unit with the front side up is turned upside down. After that, the document is fed to the reading unit, first, the back side of the document is read, the image on the back side is temporarily read into the image memory, and in parallel with this, the image is read out from the image memory to read one side of the recording paper. Surface, the front and back sides of the document are reversed, and the front and back sides of the recording paper are reversed. Then, the front side of the document is read, and the image of the front side is read into the image memory. A document reading and recording apparatus for reading the image from the image memory and recording the image on the other surface of the recording paper. 3. The document reading and recording apparatus, wherein a recording sheet set in a supply section is fed to a recording section, an image of the back side of the document is recorded on one side of the recording sheet, and recording is performed again while the recording sheet is reversed. 2. The document reading and recording apparatus according to claim 1, wherein the document is fed to a document reading unit, the image of the document surface is recorded on the other side, and the other side is discharged to a sheet discharging unit. Recording method.