JPH09120182A - Automatic document feeder - Google Patents

Abstract

(57) [Summary] [Purpose] Each manuscript can be easily marked even in the 2 in 1 mode. [Structure] In the 2 in 1 mode in which two originals are arranged side by side and fed to the platen glass 15 and read, when the read original is ejected, first the position of the first original is confirmed by the ejection sensor 25, and then the stamp is printed. Solenoid 2
8 is driven to mark, and the entire surface belt 18 is driven by the length of the first original detected by the registration sensor 22 to move the original and the second solenoid is marked with the stamp solenoid 28. Attach.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the technical field of an automatic document feeder for feeding a document to a reading section of a document reading device which reads a document image and outputs an image signal.

[0002]

2. Description of the Related Art A copying machine, a facsimile machine or the like, which is a conventional image forming apparatus, has a document reading section for reading a document image and outputting an electric image signal, and the document is automatically fed to the document reading section. The automatic document feeder for paper is installed.

A conventional automatic document feeder is a stacking tray for stacking a plurality of documents, a document separating device for separating and extracting the plurality of documents stacked on the stacking tray one by one, and a document separating device for separating the document. It has a document feeding unit that feeds the read document to the document reading unit of the image forming apparatus and conveys it to the document discharging unit. Some automatic document feeders have a 2-in-1 mode in which two originals are arranged and the originals are fed so that the two originals are read as one original. As another technique, there is a stamp mechanism that marks a document that has been read.

[0004]

However, even if the stamp mechanism is provided in the automatic document feeder capable of the 2 in 1 mode, two documents are treated as one document in the 2 in 1 mode, and therefore two documents are treated as one document. There is a problem that only one of the documents can be marked.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide an automatic document feeder which can easily mark each document even in the 2in1 mode. It is what

[0006]

Therefore, the automatic document feeder according to the present invention has a feeding means for feeding / conveying a document, a stamp means for marking a read document, and a document length. And a document length detection unit for detecting the document discharge position, and a control unit for controlling each of the above units. The reading unit of the document reading device reads the document image and outputs an image signal. An automatic document feeder for feeding originals, wherein two originals are continuously fed to the reading unit and two originals are read as one original. When the first original is ejected to a predetermined position at the time of ejection, a mark is attached to the first original by the stamp means, and the length of the first original detected by the original length detecting means is moved to 2 Before the first manuscript The configuration, characterized in that the said control means so as to apply a mark is controlled by stamping unit, it is intended to achieve the above object.

[0007]

With the above construction, it is possible to easily mark each original even in the 2 in 1 mode, and at the same position as in the mode in which both originals are read by feeding one original. Can be attached.

[0008]

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

FIG. 1 shows an automatic document feeder (hereinafter, RDF).
2) is a cross-sectional view showing the configuration of FIG. First, the document lower separation / conveyance operation will be described.

Reference numeral 1 denotes a document stacking tray for stacking and setting documents. The tray 1 is used for stacking documents, and is arranged so as to be lower on the document delivery side, and is inclined downward in the document delivery direction. As a result, the documents to be fed are stacked in the feeding direction.

Further, the tray 1 is provided with a document regulating plate (not shown), and by contacting the document with the regulating plate, skewing of the document during conveyance of the document is prevented. Further, an interlocking volume (not shown) is connected to the document regulating plate, and the document width size can be detected by detecting the voltage value according to the position of the document regulating plate. Further, the tray 1 is provided with a size sensor 27 for detecting the size of the document in the conveyance direction, and it is possible to detect whether the placed document can be juxtaposed on the platen glass 15.

Reference numeral 3 denotes a half-moon roller, which is rotated in the direction of the arrow and sends out the original document to the downstream separating section. When there is no original document in the tray 1, the cutout section is directed upward to stop. Controlled by.

Reference numeral 19 denotes a recycle lever, which is driven by a recycle motor 20a at the start of document feeding and is placed on the uppermost surface of the document to distinguish the last fed document from the copied document.

A feeding roller 6 is rotated in the direction of the arrow to feed the original sent from the tray 1. At this time, the pickup solenoid is operated to press the pickup roller 4 against the original stack without rotating it,
Improves document transportation. 7 and 8 are separation rollers,
By rotating the separation belt 9 in the direction of the arrow, the lowermost original among the originals stacked on the tray 1 is separated from the feeding roller 6. The feeding roller 6 and the separation belt 9 form a separation feeding unit.

The original sent from the separating / feeding section is sandwiched between the feed rollers 11 and 12 which are driven by the feeding motor 10a and pressed against each other, and the rollers rotate in the direction of the arrow so that the originals are placed on the platen glass 15. Sent to.

At this time, by measuring the pulse amount of the paper feed motor clock sensor 10c while the original is passing the registration sensor 22 while the original is being conveyed by the feed rollers 11 and 12, the direction of the original is conveyed. The length can be detected. Further, the paper feed motor 10a also serves to drive the first discharge roller 13a and the second discharge roller 13b.

The entire belt 18 on the platen glass 15
Is an endless belt having a width large enough to cover the entire surface of the sheet document, and the surface has a sufficient friction coefficient such that the document can be slid on the platen glass 15 by a frictional force and can be conveyed in both directions. Thus, the entire surface belt 18 and the drive roller 16 are slid on the drive roller 16 and the turn roller 17 so as not to slip.

The first discharge roller 13a is the feed roller 12
And the original discharged from the platen glass 15 by the movement of the entire surface belt 18 in the A direction.
It rotates in the direction of the arrow and is pinched and conveyed. The manuscript is
The sheet is sandwiched by the discharge second roller 13b and discharged to the document tray 1. This operation is repeated until the final document or the document transport operation is stopped.

Next, the operation of separating and conveying the original will be described.

The tray 1 is provided with a size sensor 27 for detecting the size of the document in the conveying direction, and it is possible to detect whether the placed document can be juxtaposed on the platen glass 15.

First, the pickup solenoid is operated, and while the pickup roller 4 is rotated, the pickup roller 4 is pressed against the bundle of originals, so that the originals are conveyed from the topmost original tray 1 to the separating / feeding section. Recycle lever 1
In this conveyance operation, the document 9 is not driven because the document does not return to the document stacking tray 1 and it is not necessary to distinguish between the last fed document and the copied document. In the separating / feeding unit, the separating motor 5 is rotated in the reverse direction to that at the time of the lower separating / conveying, so that the separating roller 6 and the separating belt 9 are rotated in the opposite direction of the original lower separating / conveying operation to separate the uppermost originals one by one. To do. The document transportation from the separation / feed unit to the platen glass 15 is as described above.

If the originals can be juxtaposed on the platen glass 15 after the image reading by the copying apparatus is completed,
The original is moved as it is in the direction B by the entire belt, the next original is fed and conveyed, and the original is juxtaposed with the original. If the originals cannot be arranged side by side, the originals are further moved in the B direction, ejected to the original ejection tray 33, the next original is fed and conveyed, and placed on the platen glass 15. At this time, the stamped solenoid 28 is driven to push the read stamp on the document processing position as a mark indicating that the document has been read on the discharged document. This operation is repeated until the final document or the document transport operation is stopped.

Further, an operation of reversing the original placed on the platen glass 15 will be described.

By driving the reverse path release solenoid 34, the discharge path on the side of the discharge sensor 21 is switched to the document reverse path on the side of the registration sensor 22, and the entire surface belt 18 is moved.
Is moved in the A direction and the feed roller 12 is rotated to convey the document to the registration sensor 22, the drive of the feed roller 12 and the entire surface belt 18 is stopped, and then the entire surface belt 18 is moved in the B direction and the feed roller 12 is moved. The driving is started, and the original is inverted and placed on the platen glass 15.

Next, a 2 in 1 operation for arranging two originals side by side with no gap in the upper separated original conveyance will be described. As described above, the first original is placed on the platen. The entire belt 18 is moved in the direction A by a predetermined amount and waits until the separation of the two originals is completed. After the leading edge of the second original is detected by the registration sensor 22, the second original is fed by the predetermined amount by the feed roller 12, and the driving is stopped. Next, the electromagnetic clutch 32 is driven to drive the belt motor 14a and the paper feeding motor 1.
By connecting the drive system of 0a, the first original and the second original are simultaneously juxtaposed on the platen glass 15 without a gap.

FIG. 2 shows a circuit block diagram of the RDF.

The RDF in this embodiment is mainly composed of a one-chip microcomputer (hereinafter referred to as a microcomputer), and further, various controls are performed while exchanging signals with the controller of the copying machine via a communication line. It is carried out.

At the input ports I4 to I13 of the microcomputer,
The registration sensor 22 and the document detection sensor 2 provided on the document transport path in the downstream direction of the document stacking tray 1 described above.
3, paper discharge sensor 121, reversal sensor 24, paper discharge sensor 2
25, an RDF opening / closing sensor (not shown), a recycle lever reference position detection sensor 20b, a document conveyance direction size detection sensor 27, a discharged document partition lever reference position sensor 26,
The signals of the separation sensor 31 are input respectively.

Further, the interrupt terminals INT1 and IN of the microcomputer
Signals from encoder pulse signals of the shaft of the belt motor 14a and the shaft of the paper feeding motor 10a are input to T2, respectively. These serve as reference clocks for the paper feed movement amount, and the microcomputer internal counter performs counting operation.

On the other hand, the output ports O4 to O13 of the microcomputer
Includes the separation motor 5, the belt motor 14a, the electromagnetic brake 14b, the paper feed motor 10a, the recycle motor 20a, the electromagnetic clutch 32, the stamp solenoid 28,
The operation signals of the discharged document partitioning lever drive motor 29, the pickup roller drive solenoid, and the reverse path release solenoid 34 are output, and each output load is controlled via a driver.

Further, signals are exchanged with the controller of the copying machine through communication, and a document feed signal, a document discharge signal and a mode signal are inputted to the inputs I1 to I3 of the microcomputer, respectively, and the output port O1. ˜O3 outputs a COPY request signal, a document detection signal, and a document size signal.

Further, in the microcomputer, a ROM storing a control program, an R as a work area for arithmetic operations, etc.
AM, an EEPROM as a nonvolatile memory, an A / D converter for reading a voltage value, and a D as an output voltage varying means.
/ A converter is connected. The A / D converter is connected with a volume that moves in conjunction with a document regulating plate provided on the document tray 1, and the width of the placed document can be detected by detecting the voltage value thereof. .

FIG. 3 is a flow chart of the transfer mode switching of this embodiment.

First, the RDF receives a document feed signal and an operation mode signal from the copying machine, and then determines whether or not a document is placed on the document tray (S11, S1).
2). When the original is placed, the operation mode is judged (S13), and if the upper separation reversal mode is designated, the upper separation reversal operation is performed (S14). If the upper separation 2in1 mode is designated, the upper separation reversal operation is performed. The separation 2-in-1 operation (S15) is performed, and the document feeding signal is checked again after each operation (S11).

FIG. 4 is a flowchart of the upper separation inversion operation.

First, the original document on the tray is conveyed to the platen (S21). Then, in step S22, when the main body finishes reading the document, it is determined whether the stamp mode is designated (S23), and the stamp mode 1 is driven when the stamp mode is designated (S24).

Next, the original is reversely conveyed (S25), and after the original is read by the main body (S26), it is determined whether or not the stamp mode is designated (S27), and the stamp mode 1 is driven when the stamp mode is designated (S26). S28). The originals are inverted again to match the order of the discharged originals (S29), and the originals are discharged to the discharge tray 33 (S30).

FIG. 5 is a flowchart of the stamp mode 1 which is the stamp mode at the time of upper separation inversion operation.

The entire belt 18 is driven in the direction B in FIG.
Wait until the paper discharge sensor 2 of 25 is turned on (S31, S3
2) After the sensor is turned on, the predetermined amount up to the position where the stamp should be pushed is conveyed to turn off the drive of the entire belt 18 (S
33), the stamp solenoid is driven (S34), and the read stamp is imprinted on the document.

FIG. 6 is a flowchart of the upper separation 2-in-1 operation.

The two originals on the tray are successively conveyed and placed side by side on the platen (S41). After the document reading by the document reading device is completed (S42), it is determined whether or not the stamp mode is designated (S43). If the stamp mode is designated, the stamp mode 2 is driven to stamp each of the two documents. The marking is performed (S44), and the document is discharged to the discharge tray 33 (S45).

FIG. 7 is a flowchart of the stamp mode 2 when the upper separation 2 in 1 operation is performed.

The entire belt is started to be driven in the direction B of FIG. 1 (S51), and the sheet discharge sensor 2 at 25 is turned on (S52). After the sensor is turned on, a predetermined amount is conveyed to a position where the stamp should be pushed (S53), the stamp solenoid is driven, and the read stamp is imprinted on the first original (S5).
4). Further, the entire surface belt is conveyed by the size length of the first original (S55), the stamp solenoid is driven, and the original 2
The read stamp is stamped on the first sheet (S56). Here, since the stamp position is conveyed and positioned by a predetermined amount at the time of imprinting the first sheet, when imprinting on the second original, by conveying only the original length of the first sheet, The stamp position of and the stamp position of the second sheet become equal. After imprinting a stamp on the second document, the document is ejected to tray 3
The sheet is discharged to the third sheet (S57).

[0044]

As described above, according to the present invention,
Even in a mode in which two originals are juxtaposed and read as one original, a mark can be attached to each original,
The read manuscript can be easily confirmed and organized.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of an automatic document feeder according to an embodiment.

FIG. 2 is a block diagram of an RDF circuit according to an embodiment.

FIG. 3 is a flow chart for switching a transport mode according to an embodiment.

FIG. 4 is a flowchart of an upper separation inversion operation according to an embodiment.

FIG. 5 is a flowchart of a stamp mode 1 according to an embodiment.

FIG. 6 is a flowchart of an upper separation 2in1 operation according to an embodiment.

FIG. 7 is a flowchart of a stamp mode 2 according to an embodiment.

[Explanation of symbols]

 1 Document Loading Tray 2 Document Stopper 3 Half Moon Roller 4 Pickup Roller 5 Separation Motor 6 Feeding Roller 7 Separation Roller 8 Separation Roller 9 Separation Belt 10a Paper Feed Motor 10b Paper Feed Clock Disc 10c Paper Feed Clock Sensor 11 Registration Roller 12 Feed Roller 13a 1st discharge roller 13b 2nd discharge roller 14a Belt motor 14b Electromagnetic brake 14c Belt clock disk 14d Belt clock sensor 15 Platen glass 16 Belt drive roller 17 Turn roller 18 Full belt 19 Recycle lever 20a Recycle motor 20b Recycle lever Reference position detection Sensor 21 Paper ejection sensor 1 22 Registration sensor 23 Original detection sensor 24 Reversing sensor 25 Paper ejection sensor 2 26 Paper ejection original partition lever position detection sensor 27 Original conveyance Direction size detection sensor 28 Stamp solenoid 29 Discharge document partition lever drive motor 30 Discharge document partition lever 31 Separation sensor 32 Electromagnetic clutch 33 Document discharge tray 34 Reverse path release solenoid

Claims (1)

[Claims] 1. A document feeding / conveying unit, a stamping unit for marking a read document, a document length detecting unit for detecting the length of the document, and a document detecting a position for ejecting the document. An automatic document feeder for feeding a document to a reading unit of a document reading device for reading a document image and outputting an image signal, the document detecting device including a discharge detecting unit and a control unit for controlling each unit, In the mode in which the two originals are continuously fed and the two originals are read as one original, the first original is ejected to the predetermined position when the original is ejected to the predetermined position. The control means controls such that the original document is marked by the stamping means, the length of the first original document detected by the original document length detecting means is moved, and the second original document is marked by the stamping means. You Automatic document feeder, characterized in that.