JPH0899777A - Automatic document feeding device and image forming device having automatic document feeding device - Google Patents

Abstract

PURPOSE: To carry out the conformity of documents on the document loading of an automatic document feeding device adequately. CONSTITUTION: A jog member 117 to conform the width direction of the document bundle on a document loading board 5, and shutters 6 to bundle convey the document bundle, are controlled not to operate to the document bundle simultanously. After the document bundle is bundle conveyed or jogged by the shutter 6, the width direction sides of the document bundle are jogged by the jog member 117. Consequently, the jogging in the width direction of the document bundle can be carried out immediately before the feeding, and a disordered loading of the document bundle can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic document feeder which can be applied to an image forming apparatus such as a copying machine and a laser beam printer. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic document feeder which operates a moving unit capable of conveying and aligning a bundle in a supply unit and a side guide which aligns a bundle of documents in the width direction at appropriate timing, and an image forming apparatus including the same.

[0002]

2. Description of the Related Art Conventionally, in an automatic document feeder for automatically feeding a document to a reading portion of an image forming apparatus such as a copying machine, a document fed from a document table is conveyed in a forward and reverse direction. The image is read by the reciprocating movement of the light source (reading means) while being conveyed and fixed to the reading position by the belt, and then discharged onto the document placing table by the conveying belt. In this case, the discharged original is switched back from the same side as the side where the original is carried to the reading position and is conveyed to the original placing table.

In the above-described document fixing system (switchback system), it takes time to replace the documents after reading, and if the document conveying speed is increased in order to shorten the reading time, noise and impact will occur. Etc. causes problems.

In contrast to the document reading by the above-mentioned document fixing system, a flow-reading system has been proposed in which the reading means is fixed and the document is flow-read. In this non-scanning method, the original to be non-scanned is, for example, B in view of the configuration of the original placing table.
This is applied when reading small sizes such as 5, A4 and the like, and the original on the original placing table is fed to the original reading position from the side opposite to the switchback feeding.

The fed document is discharged onto the document placing table through a closed path (CP route) forming a closed loop, and the document is flow-read by the reading means in a fixed state during the conveyance. To be done.

During the above-described closed path paper feeding (CP paper feeding), the original placed on the original placing table is moved by the shutter (moving means) to the other end (CP feeding section) of the original placing table.
Is pushed to a bundle. Further, on the CP side of the document placing table, there is provided a document trailing edge sensor that detects when a large-sized document is placed, and when the sensor is operating, the document is on the switchback side. It is designed to be fed from.

The size of the original on the original placing table is a pair of width regulating plates (side guides) for regulating the width of the placed original.
By contacting both sides of the document, the size sensor interlocked with the width regulating plate detects.

On the other side of the document table (CP paper feed side), C
A partitioning member is provided that abuts on the bundle of documents conveyed to the P-feeding side. The partitioning member is a sheet that has not been fed on the document mounting table and has not been fed again after being fed to the reading position. It separates the discharged original discharged onto the original.

The originals placed on the original table and aligned in the width direction and the bundle conveying direction are bundle-conveyed to the CP paper feed side, and then conveyed on the closed path via the reading position. After that, the document is ejected onto the unfed original. It is necessary to align (jog) the side portion in the bundle conveying direction (X direction) and the side portion in the width direction (Y direction) of the discharged discharged original. The X-direction and Y-direction alignments are preferably performed so that the alignment operations do not overlap.

Further, in order to align the document bundle on the document mounting table, conventionally, a jog in the width direction (Y direction) is performed by the width regulating plate, and then a bundle is conveyed and X jog is performed by the moving means.

[0011]

However, in the above-mentioned conventional example, there are cases where the jog operation of the document stack overlaps in the X direction and the Y direction.
For example, when the jog operation in the Y direction is repeated during the jog operation in the X direction, the other side portion (width direction) is pressed while the side portion in the bundle conveying direction of the document stack is pressed. In this case, there is a problem that the proper jog operation of the document bundle cannot be performed.

Further, if the document bundle is conveyed in a bundle after the Y jog in the width direction of the document bundle is carried out, there is a problem that the document bundle varies during the bundle conveyance of the document bundle and the stacking is disturbed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic document feeder for properly jogging a bundle of documents discharged onto a document table, and an image forming apparatus having the same. is there.

[0014]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and an original placing table on which an original can be placed and the originals are separately supplied one by one, and the originals are further fed. An original document conveying means for conveying the original document table to the reading position and discharging it onto the original document table, and an elevating means for elevating and lowering the original document table to a raised position and a lowered position for supplying the original document to the original document conveying means are provided. In the automatic document feeder, the side jogging means provided on the side guides supported by the document placing table to align the width direction of the document and the document on the document placing table are supplied to the document feeding means. A moving means for moving the side jogging means and the moving means so that the side jogging means and the moving means do not act on the original at the same time;
It is characterized by comprising.

Further, the control means drives and controls so that the moving means moves the original and the side jogging means operates after the original placing table is lowered by the elevating means.

Further, it is placed on an original on the original placing table which has been moved by the moving means and has not been conveyed by the original conveying means so as to come in contact with and separate from the original, and from the original conveying means to the original placing table. There is provided partitioning means for partitioning the discharged original from the original not conveyed by the original conveying means, and the side jogging means also acts on the original discharged from the original conveying means onto the original placing table. At the same time, the moving means acts so that the discharged document comes into contact with the partition means.

Further, at least the moving means is driven so as to be thinned so as to operate every predetermined number of originals discharged to the original placing table.

[0018]

According to the above construction, for the document stack placed on the document mounting table, either one of the side jog means for aligning in the width direction and the moving means for carrying or aligning the bundle of document stacks operates. After that, the other means are controlled by the control means to operate. Thus, the side jog means and the moving means do not act on the document bundle at the same time, and the document bundle can be properly aligned.

Further, the document stack stacked (discharged) on the document mounting table is first aligned in the width direction (Y direction) after being transported in the bundle transport direction by the moving means. As a result, the Y jog in the width direction can be performed immediately before the feeding, so that the stacking of the document bundle before the feeding can be prevented.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows an example of an image forming apparatus main body to which the automatic document feeder according to the present invention can be applied.

The copying machine main body 900 includes a platen glass 3 as a document reading portion and a light source (reading means) 90.
7, lens system 908, paper feeding unit 909, image forming unit 902
And so on. Documents P are fed to the platen glass 3 one by one by the automatic document feeder 2.

The paper feeding unit 909 has cassettes 910 and 911 for accommodating the sheet material and being detachable from the apparatus main body 900, and a deck 913 arranged in the pedestal 912. The image forming unit 902 includes a cylindrical photosensitive drum 914.
A developing device 915, a transfer charging device 916, a separation charging device 917, a cleaner 918, a primary charging device 919, and the like, each having a built-in printer, are provided. A transport device 920, a fixing device 904, and a discharge roller 90 are provided on the downstream side of the image forming unit 902.
5 and the like are provided.

The discharged sheet material S is classified as needed by a sheet classification device 922 connected to the copying machine main body 900. Reference numeral 930 is a copying machine main body 90.
0 controller (CPU) is shown.

The operation of this image forming apparatus will be described.

When a paper feed signal is output from the control device 930 provided on the apparatus main body side 900, the cassette 91
The sheet material S is fed from 0, 911 or the deck 913. On the other hand, the light which is applied from the light source 907 to the original P placed on the platen glass 3 and reflected by the optical system 90.
The light is irradiated onto the photosensitive drum 914 via the beam line 8. The photosensitive drum 914 is charged in advance by the primary charger 919, an electrostatic latent image is formed by irradiating light, and then a toner image is formed by the developing device 915.

The sheet material S fed from the paper feeding unit 909
The skew is corrected by the registration roller 910, and the timing is adjusted to be sent to the image forming unit 902. In the image forming unit 902, the toner image on the photosensitive drum 914 is transferred to the sheet material S sent by the transfer charger 916, and the transferred sheet material S has a polarity opposite to that of the transfer charger 916 by the separation charger 917. And is separated from the photosensitive drum 914.

Then, the separated sheet material S is conveyed to the fixing device 904 by the conveying device 920, and the unfixed transfer image is permanently fixed to the sheet material S by the fixing device 904. The sheet material S on which the image is fixed is the discharge roller 90.
5 is discharged from the apparatus main body 900.

In this way, the sheet material S fed from the paper feeding section 909 is formed with an image and discharged.

Next, the automatic document feeder according to the present invention will be described.

FIG. 1 is a vertical sectional front view of the automatic document feeder 2. In the figure, on the platen glass 3 of the main body 900 of the copying machine, a forward / reverse transport belt (endless belt) 20 wound around a driving roller 17 and a driven roller 19 is arranged.

A plurality of originals P are placed on the original placing table 5 and are aligned in a width direction regulated by a pair of width regulating plates 7. The recycle lever 10 placed on the document P indicates a member that distinguishes the unfed document P from the fed document P discharged onto the document mounting table 5 after being fed. Reference numeral 6 denotes a shutter (moving means) that receives and aligns the leading edge of the document P, and retracts below the document table 5 at the time of sheet feeding. Reference numeral 9 denotes a half-moon-shaped feed roller, which rotates at the time of paper feeding and feeds the document P from the lowermost side of the document P.

On the downstream side of the delivery roller 9, there is disposed a separation section composed of a conveyance roller 11 rotating in the document feeding direction and a separation belt 12 rotating in the document returning direction. The delivered document P is separated and conveyed one by one. Further on the downstream side, a pair of registration rollers 13 and 15 composed of a reversing roller (driving roller) 13 and a driven roller 15 in contact with the reversing roller 13 are arranged, and the original P is placed on the platen glass 3 at a predetermined timing. Feed the paper. The original P conveyed on the platen glass 3 by the rotation of the conveyor belt 20 and stopped at a predetermined position is detected by the light source 9
By manipulating 07 in the direction of the arrow, the original image is fixedly read.

The first conveying path 1 is formed by the conveying path including the separating portions 11 and 12 and the pair of registration rollers 13 and 15.
6 are configured. The first transport path 16, the transport belt 20, the discharge path 26, and the like constitute a switchback path TS that transports the document P to the reading position by switchback and discharges it.

After the fixed reading is completed, the original P is conveyed by the conveyor belt 2.
By the reverse rotation of 0, it is conveyed to the flapper 25 via the conveyance path outside the reversing roller 13. The flapper 25 reverses the original P and guides it to the platen glass 3 when reading both sides of the original P, and ejects the original P through the discharge path 2 when reading on one side.
It guides to the discharge roller pair 29 via 6. Reference numeral 27 denotes a sensor that detects the document P passing through the discharge path 26. The document P discharged by the pair of discharge rollers 29 is placed on the document P that has not been fed on the document mounting table 5 and is partitioned by the recycle lever 10 to be distinguished.

The document table 5 is rotatable about the support shaft 4 between the tilted position shown in FIG. 1 and the horizontal position shown in FIG. 3 by the operation described later. In the tilted position shown in FIG. ,
The original P is conveyed to the platen glass 3 through the first conveying path 16 as described above, and at the position of FIG. 3, the rear end of the original P is conveyed to the platen glass 3 through the second conveying path 45. It is designed to be transported.

The second transport path 45 and the transport belt 20
The discharge path 26 and the like constitute a closed path TC for conveying the document P in a closed loop to the reading position and discharging it. Further, a document transport means T for transporting the document P to a reading position and discharging it by the switchback route TS, the transport belt 20 and the closed path route TC.
S, TC, and 20 are configured. Reference numeral 77 denotes a document transport means T for transporting the document P delivered by the delivery roller 36.
The supply part which supplies S, TC, and 20 is shown.

On the rear end side of the document placing table 5, members similar to the above-mentioned members are arranged, 37 is a guide plate, 36 is a half-moon-shaped feed roller, and 39 is a document P feed roller. Numeral 40 denotes a weight pressed against 36, numeral 40 denotes a conveying roller rotating in the document feeding direction, and numeral 41 denotes a separation belt rotating in the document P returning direction.

On the downstream side of the CP (closed path side) separating portion consisting of the conveying roller 40 and the separating belt 41, the separated platen glass 3 is used as a reading position.
A second transport path 45 for transporting to is provided. In the second transport path 45, the transport roller pair 43, the registration sensor 48, the registration roller pair 46, the feeding roller pair 4
7 are provided respectively.

Between the upper roller of the feeding roller pair 47 and the second roller 19 of the conveyor belt 20, a moving guide for guiding the original P to the platen glass 3 or guiding the original P on the platen glass 3 is provided. A member 50 is provided.

Reference numeral 51 is a manual feed tray for manually feeding the original P into the automatic document feeder 2, 52 is a manual feed roller, and 53 and 49 are guide plates for the manual feed.

Next, the operations of the shutter 6 and the document table 5 when the document P is fed will be described.

4 to 6, a frame 31 and a supporting member 32 integral with the frame 31 are provided on both sides of the document table 5.
Are fixed to each other, and the support member 32 is rotatable around the support shaft 4. The bending piece 31a provided on the frame 31 is pressed down by the drive pin 35a provided at the free end of the drive member (elevating means) 35 to descend. The drive member 35 is fixed to both ends of the connecting shaft 33, and is rotated by a drive source such as a motor. The driving member 35 and the driving source constitute an elevating / lowering device that moves the document table 5 up and down. Reference numeral 32b shown in FIG.
3 shows a hole for the delivery roller 9 to extend upward during rotation.

When the document P is fed from the rear end side (when the document P is read in order to perform high-speed reading), the driving member 35 rotates to drive the driving pin 35a.
Presses the bent piece 31a of the frame 31. As a result, the original placing table 5 is moved from the tilted state of FIG.
It is rotated to the horizontal state of (c).

In FIG. 4, the support shaft 5 integrated with the shutter 6 is provided.
5 is a support portion 63a integrated with the block 63 (see FIG. 6).
It is rotatably attached to. Reference numeral 60 denotes a solenoid which drives the shutter 6, and its operating member 60a.
One end of the connecting member 61 pivotally supported by
9 is fixed. The pin 59 is engaged with a long hole provided at the free end of the arm 57, and the arm 57 is
It is rotatable around the support shaft 57a.

The lower end of a driven member 56 having a free end fixed to the support shaft 55 faces the pin 59.
The shutter 6 is urged in the clockwise direction in FIG. 4, that is, in the direction in which the shutter 6 extends from the document placing table 5, by the tension springs 62 whose both ends are locked by the shutter 6 and the connecting member 61.

When the original P on the original table 5 is conveyed through the first conveying path 16 (in order to make a plurality of copies,
The shutter 6 functions as an ordinary shutter (for reading with the document fixing method), and as shown in FIG. 4A, the amount of protrusion from the document table 5 is small. When a feeding start signal from the control device 930 (FIG. 2) is given to the solenoid 60 and actuated, the arm 57 moves to the position shown in FIG.
Is rotated clockwise at. As a result, the driven member 56 is pressed by the pin 59 and rotates counterclockwise as shown in FIG. At the same time, the shutter 6 integrated with the arm 57 rotates in the same direction, so that the shutter 6 is retracted from the upper surface of the document table 5 (FIG. 4B). In this state, the feeding roller 9 is rotated, so that several sheets of the document P are conveyed to the separating units 11 and 12.

In FIGS. 5 and 6, the block 63 supporting the shutter 6 is movably supported by a guide shaft 65. Reference numeral 32a denotes a guide piece that engages with and guides the protrusions 6a at both ends of the shutter 6 when the shutter 6 returns to the original position shown in the figure. In the state of FIG. Thus, the protrusion 6a is in pressure contact with the guide piece 32a.

Reference numeral 66 denotes a pulse motor (bundle conveying motor 6) for moving the shutter 6 along the upper surface of the document placing table 5.
6) showing the output gear 6 fixed to its output shaft
6a is in mesh with the pulley gear 67. Pulley gear 6
7 pulley 67a and a plurality of pulleys 69a, 69b, 6
A belt 70 is wound around 9c, and a part of the belt 70 is joined to the block 63. As a result, the shutter 66 is rotated by the rotation of the motor 66 according to the length of the document P.
Is movable in the longitudinal direction (front-back direction) of the document table 5.

The original P is fed from the rear end to the second conveyance path 45.
When the sheet is conveyed to the side, the document table 5 is lowered horizontally as described above with the shutter 6 held at the position shown in FIG. 4A (FIG. 4C). When the guide piece 32a of the supporting member 32 integrated with the document placing table 5 is rotated in the descending direction, the protrusion 6a of the shutter 6 which is pressed against the guide piece 32a follows the same direction (clockwise in FIG. 4). ) Rotate to.

As a result, the shutter 6 is moved to the original placing table 5
By rotating the shutter 6 in the clockwise direction relative to the above, the projection amount of the shutter 6 is increased as shown in FIG. In this state, the shutter 6 is driven by the motor 66 and moved to the second delivery roller 36 side, so that the documents P are conveyed in a bundle, and the second delivery roller 36 and the second separating unit are conveyed. 40, 41 for the second transport path 4
5 can be fed (see FIG. 5).

As described above, when the shutter 6 is made to function as the bundle conveying means, the projection amount of the shutter 6 is increased so that the end portion (the leading end portion) of the document P placed on the document placing table (5). Even if there is curl, the end portion is engaged with the shutter 6 and the bundle of documents P can be stably conveyed.

Documents P fed by the second feeding roller 36 and separated one by one by the separating units 40 and 41.
Is conveyed onto the platen glass 3 which is the reading section via the second conveyance path 45. Further, the document P is fed by the light source 907A stopped at a predetermined position while being transported by the transport belt 20, and is discharged onto the document table 5 via the discharge path 26.

In FIG. 1, the light source 907A, which is the reading means, is moved to a predetermined position when the original P is read in a flow mode. At the position above the light source 907A, the pair of pressing members 110 are provided on both side ends of the conveyor belt 20.
Is pressed against the platen glass 3. As a result, even if the side edge of the conveyor belt 20 has a wavy shape due to a change over time due to the use of the conveyor belt 20, the side edge of the document P is lifted and reading failure due to this is prevented.

FIG. 7 shows the shutter 6 and the weight 39 for pressing and partitioning the documents P that are bundle-pressed by the shutter 6. In FIG. 7A, the document P placed on the document table 5 is regulated by manually moving the pair of width regulating plates 7. The document P is aligned in the width direction (Y direction) by the reciprocating motion of the jog member 117 provided on the one width regulating plate 7 in the width direction.

The weight 39 has a base portion rotatably mounted on a support shaft, and is vertically movable so as to press the unfed original P ₀ on the original table 5 against the delivery roller 36. When, it has been fixed to the base support shaft 39a, to regulate as shown in (b) FIG tip end of the original P ₁ of the first round to be discharged is fed onto the document P ₀ from the document table 5 It is composed of a partition member 39B.

FIG. 8 shows the operation panel 120 of the copying machine main body 900 and the automatic document feeder 2. 1
Reference numeral 25 is a start button 125, 121 is a stop key 121, 122 for stopping the feeding of the original P, and 122 is a flow reading adjustment key 122.

FIG. 9 shows a drive system of the automatic document feeder.

Reference numeral 95 is a recycle motor that drives the recycle lever 10 that partitions the sheet material P that has already been fed and the sheet material P that has made a round, 101 is a weight SL that raises and lowers the pressing member 39A, 92 is a separation motor, and 92b is a separation motor. The encoder 103 includes the separation unit 4 for rotating the separation motor 92.
A clutch for transmitting 0, 41, a belt motor 91 for driving the conveyor belt 20, a separating motor encoder 91b, a reversing motor 93 for driving the reversing roller 13, 93
Reference numeral b denotes a reversing motor encoder, 98a denotes a driven roller encoder of the registration roller pairs 13 and 15, 99 denotes a paper discharge motor, 99b denotes a paper discharge motor encoder for driving the discharge roller pair 29, 66 denotes a bundle conveying motor for moving the shutter 6. 102 is a tray elevating motor for moving the document table 5 up and down, 105 is a partition member SL for vertically moving the partition member 39B, 106 is a weight SL for vertically moving the pressing member 39A, and 107b is a conveyance roller pair encoder 107.
Reference numerals b and 109 denote CP registration motors 109 and 109b for driving the registration roller pair 46, respectively.

FIG. 10 shows a block diagram relating to the control of the automatic document feeder 2. To the control device (CPU) 100 of the automatic document feeder 2 are connected the respective sensors arranged in the main part of the automatic document feeder 2 shown in FIG. In FIG. 1, 71 is an empty sensor for detecting the presence or absence of the document P on the document table 5, 72 is a separation sensor, 73 is a pre-registration sensor for detecting the registered document P, and 74 is a sensor.
Is a post-registration sensor, 75 is a reversing sensor for detecting the document P passing through the reversing roller 13, 42 is a CP-side separation sensor, 48 is a registration sensor, and 79 is a paper feed sensor.

The flow-through reading mode for flow-reading the original P will be described with reference to FIG.

A tray down process is performed to move the document tray 2 to the lower limit position (draftseql), and a document bundle transport process is performed to move the document stack P to the right (dr).
aftseq2), after that, the document is conveyed in the bundle conveying direction (X jog), and then the width direction jog (Y jog) is sequentially performed (draftseq3). After that, the lowermost document is rotated clockwise to separate only one sheet. Perform separation processing (d
raftSeq4).

After that, a clockwise sheet feeding process (draftseq) is performed in order to arrange the original by 1 by one upstream from the image reading destination.
5) is performed, and when the document exchange (flow start start) trigger is received from the main body 900, the image is read by the main body 100.
In order to perform the operation while keeping the optical system 133 fixed at a predetermined position, a document flow reading process is performed (draftseq6), and the document is moved to a fixed image destination position at a predetermined speed. afterwards,
A document is discharged onto the document tray 2 by performing a clockwise paper discharge process (draftseq7).

Also, during the clockwise separation processing (dra
If the final document determination of ftSeq4) is negative, the right document separating process for the next document is activated during the right paper feeding process (draftSeq5) of the next step, thereby enabling continuous document feeding.

Further, a clockwise paper discharge process (draftse)
After q7), if it is the final document, the tray-up process (draftseq8) is performed to return the document tray 2 to the initial position.

Also, the original flow reading process (draftSe)
q6) After finishing, if you want to form multiple images,
00, it is possible to return the light source 907 to the home position on the fixed image side, and then perform fixed reading by moving the light source 907 a desired number of times.

The drive mechanism for the width regulating plate 7 will be described with reference to FIG.

A pair of width regulating plates 7 are mounted on both sides of the document table 5 so as to be movable in the width direction (arrows 86, 87). A document size detection sensor (document size recognition means) 80 including a rotary volume is provided at the center of the document placing table 5, and the rotary volume 8 is provided.
A pinion 81 is fixed to the output shaft 80a of 0.

At a position opposite to the pinion 81,
A pair of racks 82 mesh with each other, and their bases are fixed to the width regulating plates 7, respectively. As a result, when the width regulating plate 7 is manually moved so that the width regulating plate 7 is brought into contact with both sides of the placed document P, the rotary volume 80 is rotated according to the width size of the document P. By doing so, the size of the document P is automatically detected.

FIG. 13 shows the relationship between the original size of the original P placed on the original placing table 5 and the rotation angle of the rotary volume 80. The original placing table 5 depends on the rotation amount of the rotary volume 80. The size of the original document P placed on the sheet is checked.

One side jog (Y
The jog) SL is internally provided, and one end of a pair of links 115 is pivotally attached to the connecting lever 113 connected thereto. The other end of the link 115 is the jog member 1
17 are each pivoted. As a result, when the side jog SL112 is turned on / off, the jog member 117 is
Reciprocates in the width direction of the document table 5 to align the placed document P in the width direction.

Next, the alignment (jogging process) of the document discharged onto the document table 5 will be described with reference to the flowcharts of FIGS. 14 and 15.

The original bundle placed on the original placing table 5 is conveyed in a bundle by moving the shutter 6 to the CP paper feeding side.

FIG. 14 shows the bundle conveying direction of the document bundle (X direction).
Shows the jogging process to. First, the JOG-TM which determines the number of times the shutter 6 is jogged is initialized (jog1), the bundle conveying motor 66 for rotating the shutter 6 forward and backward is turned on, and at the same time, a timer JOG-TM that can be arbitrarily set is started. Let (jog2),
When the timer JOG-TM finishes the set time (jog
3), the bundle conveying motor 66 is turned off to return the shutter 6 to the initial state, the timer JOG-TM is started in the same manner as described above (jog4), and when the set time of the timer ends (jog5), the number of times jogging is performed. Is increased (jog6), and the process is repeated by returning to (jog2) until the round trip of the shutter 6 is completed three times (jog7).
As a result, the original bundle P is aligned in the bundle conveying direction (X direction).

After the jogging process in the bundle conveying direction is completed, the document bundle is subjected to the jogging process in the width direction.

In the jogging process, the JOG-CN for determining the number of times of jogging is first initialized (jog-CN).
l), the side jog SL112 for pushing out the jog member 117 of the width regulating plate 7 is turned on, and at the same time, a timer JOG-TM that can be arbitrarily set is started (jog.
2) When the timer JOG-TM has finished the set time (jog3), the side jog SL112 is turned off to return the jog member 117 to the initial state, and the timer JOG-TM is started (jog4) in the same manner as above, and the timer is started. When the set time of (jog5) is finished, the number of times of jogging is increased (jog6) until the reciprocating path of the jog member 117 is finished three times (jog7), (jog2).
Return to and repeat the process. As a result, the document stack P is aligned in the width direction, and skewing, lateral registration, etc. can be prevented.

By carrying a bundle of originals on the original placing table 5 and performing X jog, and then performing Y jog in the width direction, it is possible to perform jog in the width direction immediately before feeding.
CP feeding can be performed without causing stacking disturbance of the document stack.

When the bundle of conveyed documents is fed by CP and is discharged onto the unfed originals via the reading position, the shutter 6 is retracted to a position that does not interfere with the discharging action of the discharged originals. Every time one discharged document is discharged, the shutter 6 jogs in the bundle conveying direction to bring the discharged document into contact with the partition member 39B for alignment.

The operation of bringing the discharged document into contact with the partition member 39B is not limited to the operation for each one of the discharged documents, but is performed for every two or three discharged documents, and the shutter is released. The operation of 6 may be thinned out.

[0080]

As described above, according to the present invention,
Since the side jogging means for aligning the width direction of the originals placed on the original placing table and the moving means for carrying the bundles of the originals and the jogging processing do not act on the originals at the same time, the originals are properly aligned. Can be done.

Further, since the document is conveyed in the bundle and the jogging in the bundle conveying direction is performed, the jogging in the width direction is performed. Therefore, the alignment in the width direction can be performed immediately before the sheet feeding, and the stacking disturbance of the document bundle can be prevented. be able to.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an automatic document feeder according to the present invention.

FIG. 2 is a vertical cross-sectional front view showing an example of an image forming apparatus to which an automatic document feeder is applicable as well.

FIG. 3 is an operation diagram of the automatic document feeder of FIG.

4A is a side view of the shutter section and the document placing section when a document is fed from the switchback path, FIG. 4B is an operation diagram of FIG. 4A, and FIG. Is a side view of the shutter section and the document tray section when feeding documents from the closed path.

FIG. 5A is a side view of a shutter portion and a document mounting table portion when a document is conveyed from a switchback path, and FIGS. 5B and 5C are operation diagrams of FIG. 5A.

FIG. 6 is a plan view of the shutter section and its drive section.

FIG. 7A is a plan view of a document placing table and a weight portion, and FIG. 7B is a side view of FIG. 7A.

FIG. 8 is a plan view of the operation panel.

FIG. 9 is a vertical sectional front view showing the configuration of a drive system of the automatic document feeder in the same manner.

FIG. 10 is a block diagram of control of the automatic document feeder according to the first embodiment.

FIG. 11 is a flow chart of the same flow mode.

FIG. 12 is a plan view of the width regulating plate and its driving portion.

FIG. 13 is a correlation diagram between the original size and the rotary volume.

FIG. 14 is a flowchart showing a jogging process in the bundle conveying direction of the shutters.

FIG. 15 is a flowchart showing a jogging process of the jog member in the width direction.

[Explanation of symbols]

P Document S Sheet material TS Switchback path TC Closed path TS, TC, 20 Document transport means 2 Automatic document feeder 3 Platen glass (reading section) 5 Document placement table 6 Shutter (moving means) 7 Width regulation plate 9 Switchback Side feeding roller 10 Recycle lever 11 Conveyor roller 12 Separation belt 11, 12 Separation section 13 Reversing roller (driving roller of registration roller pair) 15 Followed roller of registration roller pair 16 First conveying path 20 Conveying belt (endless belt) 35 Driving member (elevating means) 36 CP-side feed roller 39 Weight 39A Pressing member 39B Partitioning member 40 Conveying roller 41 Separation belt 40, 41 CP-side separating portion 45 Second conveying path 47 Feed roller pair 48 Registration sensor 60 Solenoid (Shutter rise 66) Bundle transport motor 76 Document rear end sensor (detection unit) 77 Supply unit 80 Rotary volume (Document size recognition unit) 100 Automatic document feeder control device (CP)
U) 112 side jog solenoid (side jog means) 900 image forming apparatus main body 902 image forming unit 930 image forming apparatus controller

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Claims (6)

[Claims] 1. An original placing table on which an original can be placed, and original feeding means for feeding the original separately, feeding the original to a reading position, and discharging the original onto the original placing base. An automatic document feeder comprising: an elevating means for elevating the document placing table to a raised position and a descending position for feeding the document to the document conveying means, wherein a side guide supported by the document placing table is provided. Is provided,
Side jogging means for aligning the width direction of the original, moving means for moving the original on the original placing table to the supply portion of the original conveying means, and the side jogging means and the moving means do not act on the original at the same time. As described above, the automatic document feeder according to claim 1, further comprising: control means for driving and controlling the side jogging means and the moving means. 2. The control means is driven and controlled so that the moving means moves the document and then the side jogging means operates while the document placing table is lowered by the elevating means. The automatic document feeder according to claim 1. 3. A document which is moved by the moving means and is not conveyed by the document conveying means is placed on a document on the document placing table so that the document can be freely moved into and out of the document placing means and is placed on the document placing table by the document conveying means. There is provided partitioning means for partitioning the discharged original from the original not conveyed by the original conveying means, and the side jogging means also acts on the original discharged from the original conveying means on the original placing table. At the same time, the automatic document feeder according to claim 1 or 2, wherein the moving means acts so that the discharged original comes into contact with the partition means. 4. The automatic document feeder according to claim 3, wherein at least the moving unit is thinned and driven so as to operate every predetermined number of documents discharged to the document table. 5. The document conveying means conveys a document to the reading position on the platen, and a document on the document table to the endless belt so that the endless belt moves to the reading position. After the conveyance, the belt is reversed to discharge the document on the document placing table, and the document on the document placing table is conveyed to the endless belt, and the endless belt is passed through the reading position. A closed path that rotates in one direction and discharges the document onto the document table. When the document table is in the raised position, the document is supplied from one end thereof to the supply unit of the switchback path. Get
The automatic document feeder according to any one of claims 1 to 4, wherein when the document placing table is in the lowered position, the document is supplied from the other end to the supply unit of the closed path. 6. An automatic document feeder according to any one of claims 1 to 5, and an image forming unit for reading the original at the reading position and forming an image based on the read image information. An image forming apparatus comprising: a sheet material feeding unit that feeds sheet materials one by one, and transfers an image formed on the image forming unit onto the sheet material and discharges the sheet material.