JP2760523B2 - Automatic document feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is mounted on a copying machine, facsimile, or other device for transferring an image of a document to paper, and automatically supplies the document to a document scanning position of the device. The present invention relates to an automatic document feeder for feeding paper.

[Conventional technology]

Conventionally, such an automatic document feeder that automatically feeds a document to a document scanning position as described above includes a document feeding unit that feeds the document to a document scanning position of a device such as a copying machine, and a document scanning position. And a document discharge section for discharging the document scanned by the scanner. A device such as a copying machine equipped with the automatic document feeder is provided with a sheet on which an image is transferred in the main body. A paper discharge to discharge to the outside is often provided on the side of the main body.

In addition, the automatic document feeder is provided with a document discharging means for guiding the scanned document to a paper discharge tray for collecting the paper after the image transfer, so that the original and the paper after the image transfer are the same paper. There is also an automatic document feeder described in, for example, Japanese Patent Application No. 62-11846, which can be collected at once by a paper discharge tray.

[Problems to be solved by the invention]

However, as described above, the document feeder and the document discharger are provided in the automatic document feeder, and the paper on which the image is transferred to the apparatus for transferring the image, such as a copying machine, is discharged to the outside of the apparatus. When a discharge unit is provided, for example, in a copier, the paper discharge port of the paper discharge unit is generally formed on a side surface of the main body. When the device is installed, when the original is inserted from the original feeder and the paper on which the image is transferred is to be collected from the paper exit, in most cases, the user must bend down or move. Unable to do that,
In particular, when the document feed port of the document feed section and the sheet discharge port of the sheet discharge section are located separately on the left and right sides of the apparatus main body, the moving distance increases, so that efficient copying work cannot be performed. There was a problem.

Further, in the case of the automatic document feeder described in Japanese Patent Application Laid-Open No. 62-11846, the operator and the paper after image transfer can be collected at the same time from the same paper discharge tray, so However, in the case of this apparatus, since the paper (transfer paper) of the original is mixed and collected, there is a problem that it takes time to sort the paper.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and enables an operator to easily set a document without bending or moving his / her hips, and to easily form a sheet after image transfer. It is intended to be able to be collected.

It is another object of the present invention to prevent the originals to be fed and the originals to be discharged and the originals from being mixed with the papers after the image transfer.

[Means for solving the problem]

In order to achieve the above object, the present invention provides an automatic document feeder mounted on an apparatus for transferring an image of a document to a paper such as a copying machine. A document discharge unit that discharges a document scanned at the document scanning position; and a paper discharge unit that receives a sheet on which an image of the document has been transferred by the apparatus and discharges the sheet from a paper discharge port. The document feeder of the document feeder is placed close to the document discharger of the document discharger, and the paper discharger of the paper discharger is placed closer to the upper part of the document feeder. Along with
The first partition that separates the document to be fed between the document discharge port and the document feed port and the document to be discharged is defined as the document to be fed between the document feed port and the paper discharge port and the discharge. A second partition, in which the length of the first partition in the document feeding direction is arranged above the first partition so as to be substantially parallel to the first partition. It is longer.

(Operation)

According to the automatic document feeder configured as described above, the document is fed to the document scanning position of the device that transfers the image of the document to the paper by the document feeder, scanned there, and then discharged. It is discharged by the department.

The paper on which the image has been transferred by the above-described device is
Since it is received by the paper discharge unit provided in the automatic document feeder and discharged from the paper discharge port,
The operator can set the original without bending down or moving, and can easily collect the paper after the image transfer.

In addition, since a document discharge port, a document feed port, and a paper discharge port are arranged in this order from the bottom, and a first partition and a second partition are provided between them, a document to be fed and a sheet to be discharged are provided. This is convenient because the original document and the original document and the sheet after the image transfer are not mixed.

〔Example〕

Hereinafter, a specific description will be given based on an embodiment of the present invention.

FIG. 1 is a schematic configuration diagram of an automatic document feeder showing one embodiment of the present invention, and FIG. 2 is an overall configuration diagram showing an entire copying machine equipped with the automatic document feeder.

As shown in FIG. 2, the automatic document feeder 1 is mounted on an upper part of a copying machine main body 2 in which various parts for executing an image forming process are housed. Is provided with a multi-stage paper feeder 4 in which a plurality of paper feed trays 3A to 3E are arranged.

On the right side of the copying machine main body 2, a multi-manual feed table 5 which is normally closed and opened only when used is mounted so as to be openable and closable, and a transfer set on the multi-manual feed table 5 is provided on the left upper part thereof. A call roller 6 for feeding the paper P (paper) is provided, and a feed roller 7 and a separation roller 8, which are pressed vertically, and a registration roller 9, on a transport path on the downstream side of the feed, in a direction indicated by an arrow. A rotatable photosensitive drum 11 is provided.

On the other hand, a contact glass 12 on which a document D to be copied is placed is provided on the upper surface of the copying machine main body 2, and below the contact glass 12, a predetermined document scanning position (exposure position) on the contact glass 12 is set. An optical system 20 for scanning the image of the document D in the direction of arrow A is provided.

The optical system 20 includes a light source 21 for illuminating the original and a reflector 21.
22, each movable mirror 23, 24 and 25, and a zoom lens 26
And a fixed mirror 27, 28, and 29. The light source 21, the reflector 22, and the movable mirror 23 constitute a first scanner, and the movable mirrors 24 and 25 constitute a first scanner. The second scanner forms a second scanner, and the first scanner is V / m (m is a copy magnification) with respect to the peripheral speed V of the photosensitive drum 11.
2 at the same time, and at the same time, the second scanner is also moved at a speed of V / 2m in the direction of arrow A by a drive motor (not shown).

The peripheral speed V of the photosensitive drum 11 is always constant irrespective of the same magnification and the same magnification, and the copy magnification is changed by changing the position on the optical path of the zoom lens 26. when in the position in G ₁ of FIG. 2 is m = 2.0 (200
% Expansion), is m = 1.0 (magnification when in position of G _2), G ₃
M = 0.5 (50% reduction) when in the position of.

In addition, around the photosensitive drum 11, the photosensitive drum
Charger 14 for uniformly charging 11, eraser 15 for erasing the charged unnecessary portion, and optical system 20
A first developing unit 16 and a second developing unit 17 for applying an electrostatic latent image formed on the surface of the photosensitive drum 11 to the toner powder using a magnetic brush to visualize the electrostatic latent image; And a cleaning device 19 for cleaning the toner remaining on the sightseeing drum 11 without being transferred to the paper.

The belt copying device 18 lightly presses a part of the endless belt 32 stretched around the four rollers 31 to the photosensitive drum 11 and discharges a corona discharge for transfer from a back surface (inside of the belt) with a charger 33. Reference numeral 34 denotes a charger for charging the endless belt 32 to electrostatically attract the transfer paper P. Reference numeral 35 denotes a charge removing charger for removing the charge of the endless belt 32, and reference numeral 36 denotes a rubber blade for cleaning the residue of the endless belt 32.

A fixing device 37 is provided on the downstream side of the photosensitive drum 11 in the sheet feeding direction. Further, a small-size transfer sheet of A4 (or LT) size or less is printed on the downstream side of the photosensitive drum 11 by imaginary lines. A conveying roller 57 that can rotate in reverse to the gate claw 38 that switches to the position shown in the figure, a synthetic gate claw 39 that switches to a position shown by a virtual line at the time of synthetic copying at a position slightly spaced from the conveyance roller 57, and a paper feed downstream thereof A gate claw 40 for switching to a position shown by a virtual line is provided on the transport path when a large-sized transfer paper having a length of A4 or B5 or more is double-sided copied, for example.

Further, a pair of reversing rollers rotatable in both forward and reverse directions on a transport path 43 extending from the gate claw 40 to a discharge tray 41 formed at the uppermost portion of the automatic document feeder 1 via a transport path 73. A transport roller 52 that can also be rotated in both forward and reverse directions.
Are provided at intervals, and a sensor 55 is provided immediately before the gate claw 38, and a sensor 56 is provided immediately after the reversing roller 51.

Then, the transfer paper P at the time of the composite copy and the duplex copy is
After being conveyed to the re-feeding device 42 provided below the copying machine main body 2, the paper is fed again, the second image transfer is performed, and the image is fixed.

The re-feeding device 42 can carry in the transfer paper P from two places, a first carry-in path 58 and a second carry-in path 59, and the discharge path for discharging the transfer paper P is provided in the path of the first carry-in path 58. A roller 61 is provided.

Similarly, a discharge roller 62 is provided in the second carry-in path 59,
A gate claw 6 for switching the entrance gate according to the size of, for example, A3 to A4 (vertical feed) on the downstream side of the sheet supply.
3, 64, 65, and discharge rollers 66, 67 are provided between the respective gate claws.

Further, on the right side (downstream of the paper feeding) of the re-feeding device 42, there is provided an alignment roller 68 that can rotate between a position shown by a solid line and a position shown by an imaginary line for aligning the leading ends of the discharged transfer papers P. ,
To the right, a paper feed belt 69 that feeds the transfer paper P while sucking the transfer paper P by a suction force exerted by a suction fan (not shown) from a hole of the perforated belt, and a paper feed belt 69 suitable for separation. A separation roller 71 that comes in contact with a predetermined pressure,
72 are provided respectively.

On the other hand, the multi-stage paper feeder 4 includes a feed roller 45, a paper feed roller 46 that is vertically contacted so as to be able to press and rotate, and a separation roller 45.
A movable paper feed unit 48 having a 47 and the like can be moved to each of the paper feed trays 3A to 3E by an elevating device (not shown), and an operation formed on the right upper surface of the copying machine main body 2 is provided. panel
When the transfer paper size is selected by 30, the moving paper feed unit 48 moves to the position of the corresponding paper feed tray, and
It feeds the transfer sheet P ₁ to P ₅ on the paper feed tray 3A to 3E.

Therefore, as described above, this copier can feed paper in two directions using the multi-manual feed table 5 and the multi-stage paper feeder 4.

That is, when the paper is fed from the multi-manual feed table 5, it is opened as shown in FIG. 2 and the transfer paper P is set thereon and pushed in. By rotation in the direction of the arrow, it is sent out between the paper feed roller 7 and the separation roller 8.

When two or more sheets of the transfer paper P are multi-fed, they are separated into one by the paper feed roller 7 and the separation roller 8 and sent to the registration roller 9 to be stopped once. If a skew has occurred, it is corrected, fed again with synchronization at the correct timing that matches the image on the photoconductor drum 11, and the image is transferred by the charger 33, which is transferred by the fixing device 37. Be established.

When paper is fed using the multi-stage paper feeder 4,
When the transfer paper size is selected in advance on the operation panel 30 of the copier, the elevator (not shown) of the multi-stage paper feeder 4 is automatically driven, and the movable paper feed unit 48 feeds paper corresponding to the selected transfer paper size. While moving to any one of the trays 3A to 3E and stopping, the paper feed tray in the stopped stage moves to the movable paper feed unit 48 side.

Thereafter, the call roller 45 comes into pressure contact with the uppermost transfer paper, sends it out between the paper feed roller 46 and the separation roller 47, separates it into one sheet, and feeds it to the copying machine body 2. Thereafter, the transfer paper P is sent to the photosensitive drum 11 via the registration roller 9 and the image is transferred, as in the case of feeding from the multi-manual feed table 5 described above.

Then, the transfer paper P on which the image is fixed is thereafter conveyed to predetermined locations through different conveyance paths depending on the designated copy conditions.

That is, in the single-sided copy mode, after the transfer paper P has passed through the fixing device 37 regardless of the size, the gate pawls 3 at the positions indicated by solid lines in FIG.
8, the document is sent to the conveyance path 43 through the combination gate claw 39 and the gate claw 40, and is discharged by the conveyance roller 54 in the automatic document feeder 1 onto the discharge tray 41 with the image face down. You.

In the case of the duplex copy mode, if the size of the transfer paper is smaller than A4 (or LT)
When the transfer paper P on which the image is transferred on one side passes through the fixing device 37 and is detected by the sensor 55, the rear end of the transfer paper passes through the gate claw 38 at the position shown by the solid line in FIG. At the timing when the transfer roller P reaches the transfer roller 57, the gate pawl 38 rotates to the position indicated by the imaginary line, and the transfer roller 57 rotates in the reverse direction of the arrow B, and the transfer paper P is sent to the first carry-in path 58 and discharged. The sheet is discharged to the upper part of the sheet re-feeding device 42 by the roller 61.

The discharged transfer paper P is moved rightward by an alignment roller 68 descending to the position indicated by the imaginary line in FIG. 2 and its leading edge is aligned. When the stacking of all the transfer papers P is completed, the paper is fed. The paper is conveyed to the conveyance roller 72 by the paper belt 69.

Thereafter, the transfer paper P is sent to the photosensitive drum 11 via the registration roller 9 in a reversed state (the image surface is on the lower side) in the same manner as in the case of image transfer to the first surface, The image is transferred to the surface, and the image is fixed by the fixing device 37. The image is transferred again to the conveying roller 57 rotating in the direction opposite to the arrow B through the gate claw 38 at the position indicated by the solid line in FIG. Accordingly, the sheet is guided by the combined gate pawl 39 and the gate pawl 40 at the positions indicated by the solid lines, and is discharged to the paper discharge tray 41 through the transport path 43.

Also, when double-sided copy mode is selected, the transfer paper size
In the case of a large size A4 (or LT) vertical feed or more, when the transfer paper P on which one side of the image is transferred passes through the fixing device 37, the transfer paper P is moved to the position of the gate claw at the position indicated by the solid line in FIG.
After passing through 38, they pass through synthetic gate claws 39 and gate claws 40 at the positions indicated by solid lines, respectively.

When the sensor 56 detects the passage of the rear end of the transfer sheet P, the reversing roller 51 and the transport roller 52 and the transport rollers 53 and 54, which will be described
Is rotated to the position shown by the imaginary line in FIG. 2, and the transfer paper P is conveyed to the second carry-in path 59 while being switched.

Here, when the transfer paper size is A3, the gate pawl 63 rotates to the position indicated by the imaginary line, and when the transfer paper size is B4 size, the gate pawl 64 rotates to the position indicated by the imaginary line. In the case of A4 portrait and B5 portrait, the gate pawl 65 rotates to the position indicated by the imaginary line, and discharges the transfer paper P onto the tray of the re-feeding device 42. Subsequent operations are the same as those in the case of A4 transverse feed and below.

When the composite (multiple) copy mode is selected, all gate claws 38 and 40 are used regardless of the size of the transfer paper.
Is in the pivot position shown by the solid line in FIG.
Only the pivoting position moves to the position indicated by the imaginary line, and the transfer paper P is transported to the second carry-in path 59. And then, the transfer paper size is A3
In the case of A4 (B5) portrait, the gate claws 63, 64, and 65 are switched according to the transfer paper size, respectively, as in the case of the above-described two-sided copy mode. At this time, all of the gate claws 63, 64, and 65 are in the rotational position shown by the solid line in FIG. 2, and the transfer paper P is discharged onto the tray of the re-feeding device 42, and is again transferred to the photosensitive drum 11. Then, the image is transferred to the first surface again.

Next, the automatic document feeder 1 will be described with reference to FIGS.

This automatic document feeder 1 feeds a document in order from the first page to a page. As shown in FIG.
A document tray 75, which is a first partition for placing the document D on the right side of the document feed port 50a, is formed with a gentle curved surface in a horizontal direction (a flat surface may be used). A paper output tray 41, which is a second partition, on which the copied transfer paper P (paper) discharged from the paper output port 70a of the unit 70 is placed, and a document output port 60a of the document output unit 60 below. The original discharge trays 10 on which the exposed originals D 'discharged from the printer are placed are formed substantially parallel to each other.

The paper discharge section 70 is provided with a transport path 73 formed by a pair of guide plates for receiving the transfer paper P transported through the transport path 43 of the copying machine main body 2 as shown in FIG. Transport rollers 53 and 54 are provided on the transport path 73 at intervals so as to be rotatable in reverse.

Further, a pressing plate 76 is rotatably attached to the left end of the document tray 75, and a spring 77 that pushes up the left lower surface of the pressing plate 76 is engaged with the tray upper member 78,
A call roller 79 is provided on the upper left side of the pressing plate 76 so as to be able to be raised and lowered at a position shown by a solid line and a position shown by an imaginary line in FIG. I support it.

A feed roller 81 and a separation roller 82 that are pressed vertically are provided on the downstream side of the feed roller 79, and the feed roller 81 is moved in the direction of the arrow, and the separation roller 82 is moved in the direction of the arrow E and vice versa. Each is supported rotatably also in the direction.

Further, a document insertion sensor 83 for detecting a document D inserted from above the document tray 75 is provided between the calling roller 79 and the paper feeding roller 81, and an arcuate guide plate is provided downstream of the paper feeding roller 81 in the paper feeding. 86a, 86b and a pair of transport rollers 85a, 8
5b, and a pair of transport rollers 87a and 87b similar thereto are provided.

Then, a sensor 88 is provided on the upstream side of the sheet feeding of the conveying roller 87a.
A guide plate 89 for guiding the document D to the contact glass 12 is provided on the downstream side of the paper supply, and a guide member 91 formed along the upper shape of the guide plate 89 can be rotated by a shaft 92. A first gate claw 93 is rotatably supported by a shaft 94 at the entrance of the transport path for reversing the document in the document discharge section 60 above the document.

The guide member 91 and the first gate claw 93 are driven by, for example, a solenoid (not shown), and are rotated between a position indicated by a solid line and a position indicated by a virtual line in FIG.

As shown in FIG. 1, a belt transporting the document D to a predetermined document scanning position (exposure position) while sliding the document D rightward on the contact glass 12 as shown in FIG. An apparatus 90 is provided, and an endless transport belt 95 is stretched around a drive roller 96, a roller 97, and a tension roller 98 that can rotate forward and reverse.

The endless transport belt 95 is made of a material having a large coefficient of friction with paper, such as a rubber material, so that the document D can be transported on the contact glass 12 during transport.

Further, each pair of transport rollers 85a, 85b and 8 shown in FIG.
A large-diameter transport roller 99 for holding the document D between the transport rollers 85b and 87b on one side of each of 7a and 87b and transporting the original D between the tray discharge rollers 101 and 102 is provided so as to be able to rotate forward and reverse. The sensor 104 is provided between the transport rollers 85b and 87b.

The tray discharge roller 102 is a driving roller that is rotated in both the forward and reverse directions by a driving source (not shown), and the driven tray discharge roller 101 is in pressure contact with the driven roller. A second gate claw 105 driven by a solenoid (not shown) is provided on the same axis as the tray discharge roller 102 so as to be rotatable.

Further, below the tray discharge roller 102, a lower discharge roller 106 is provided rotatably with the tray discharge roller 102, and guide plates 107, 108 having different shapes are provided between the lower discharge roller 106 and the first gate claw 93, respectively. Provided.

The positional relationship between the pair of transport rollers 85a and 85b and the transport roller 99, and the pair of transport rollers 87a and 87b and the transport roller 99 on a plane are as shown in FIGS. 4 and 5, for example. .

That is, the former positional relationship on the plane is such that, as shown in FIG. 4, the drive-side transport roller 85a fixedly provided at the same interval as the rotating shaft 74 is moved to the shaft 80 provided in parallel with the rotating shaft 74. It is in pressure contact with every other roller 85b on the driven side, which is rotatably mounted at this interval. Each of the transport rollers 85b on the side not in contact with the transport roller 85a is provided in parallel with the shaft 80, and is fixed to the shaft 100 which can be rotated forward and reverse by a drive source (not shown) at regular intervals. Is pressed so that it can rotate with it.

Similarly, the latter has a positional relationship on a plane, as shown in FIG. 5, in which a transport roller 87a on the driving side fixedly mounted on the rotation shaft 74 at an interval is rotatably mounted on the shaft 80 at the interval. Every other transport roller 87b that is not in contact with the transport roller 87a is in pressure contact with the transport roller 99 so as to be able to rotate with it.

Accordingly, in the case of this embodiment, each of the transport rollers 85a and 87b on the drive side can be rotated in its own rotational direction without adjusting to the rotational direction of the large-diameter transport roller 99. The conveying rollers 85b and 87b on the driven side are alternately placed in this manner, and the conveying roller 85b is changed to the conveying rollers 85a and 99, and the conveying roller 87b is changed to the conveying roller 87 without changing the pressure contact side.
It is also possible to press both a and 99 together.

Further, as the document insertion sensor 83, the sensors 88 and 104,
For example, a reflection type photo sensor is used.

In this embodiment, a call roller 79, a paper feed roller 81 and a separation roller 82 which are pressed vertically, and an arc-shaped guide plate 86
a, 86b, and a pair of each transport roller 85a, 85b and 87a, 87b,
The belt conveyance device 90 and the like correspond to the document feeder 50 that feeds a document to a document scanning position (exposure position) of the copying machine.

In addition, a belt conveyance device 90 also serving as a part of the document feeding section 50 is provided.
, Transport rollers 85b and 87b, a large-diameter transport roller 99, tray discharge rollers 101 and 102, and a lower discharge roller 106. An arc-shaped guide plate or the like provided along the document corresponds to a document discharge unit 60 for discharging a document scanned at a document scanning position.

Further, a transport path 73 formed by a pair of guide plates
The paper discharge unit 70 in which the conveyance rollers 53 and 54 receive the paper on which the image of the document is transferred and discharge the paper from the paper discharge port 70a
Is equivalent to

Next, using a copier equipped with the automatic document feeder 1, a single-sided document having an image formed only on one side is provided.
FIGS. 6 to 8 show the case where two-sided originals having images formed on both sides are respectively subjected to one-sided copying and two-sided copying.
This will be described with reference to the drawings.

First, when performing one-sided copying, the original D (single-sided original) to be copied on the original tray 75 shown in FIG. 3 is turned upward on the image surface so that the top is the first page. Set it and insert it in the direction of arrow F.

When the document insertion sensor 83 detects this document insertion, the call roller 79 descends from the position shown by the solid line in FIG. 3 to the position shown by the imaginary line, and sends out the document D to the left by rotating in the direction of arrow C. At this time, when two or more originals D are fed, rotation of the separation roller 82 in the direction of arrow E returns from the lower original and separates the original into one sheet.
Is fed between the conveying rollers 85a and 85b by the rotation in the direction indicated by the arrow.

When the document D reaches between the transport rollers 85a and 85b, the transport rollers 85a and 85b are both stopped.
The leading edge of the document D comes into contact therewith to form a slight slack at the leading edge, and if the document D has a skew, it is corrected.

Then, immediately, the transport rollers 85a and 85b rotate in the direction of the arrow, and the document D is guided by the arc-shaped guide plates 86a and 86b,
3 is fed onto the contact glass 12 through the upper part of the guide member 91 located at the position shown by the solid line, and is continuously rotated on the contact glass 12 by the rotation of the driving roller 96 of the belt conveying device 90 (in the direction of arrow G). It is transported to the right.

When the rear end of the document D passes the sensor 88, the stop control is performed by a predetermined number of pulses, and the document D is stopped with the rear end (left side in FIG. 3) as the document scanning reference side. You.

It should be noted that the stop control of the document is performed when the sensor 88 detects that the trailing edge of the document has passed by the start of the pulse count. This is because the stop position with higher accuracy can be obtained because the distance during the movement to the scanning reference position can be short.

When the original D on the contact glass 12 is exposed by the scanning in the direction of arrow A by the optical system 20 shown in FIG. 2, the driving roller 96 of the belt conveying device 90 shown in FIG.
6, the guide member 91 rotates to the position shown in FIG. 6, but the first gate claw 93 and the second gate claw 105 remain as they are, and the rotation state shown in FIG. It is in.

Accordingly, the document D is conveyed to the left in a switching manner, and its leading end temporarily protrudes onto the document discharge tray 10, but the passage of the rear end of the document D is detected by the sensor 104.
Is detected, at the same time, the transport roller 99 and the tray discharge roller 102 rotate reversely in the directions opposite to the directions indicated by the arrows in FIG. At the same time, the first gate claw 93 and the guide member 91 are respectively switched to the positions shown in FIG.

As a result, the document D is discharged onto the document discharge tray 10 by the tray discharge roller 102 and the lower discharge roller 106 and is stacked on the document discharge tray 10 as shown in FIG.

Therefore, when the document D is discharged onto the document discharge tray 10 as it is in the state shown in FIG. 6, the document is discharged with the image surface facing upward, so that the subsequent two pages and subsequent pages are sequentially displayed. There is a disadvantage that the last page is stacked on top and the last page becomes the highest, which is opposite to the state at the time of setting. However, in this embodiment, as shown in FIG. Since it discharges upward, such a disadvantage does not occur at all.

In this manner, the same operation is sequentially repeated for the originals on the second and subsequent pages, and the originals D are successively discharged onto the original discharge tray 10 in a page order with the image surface facing downward and stacked. If the original is taken out after stacking and turned over as it is, the originals are arranged on the original tray 75 in the page order set first.

Next, a case where an image is copied on both sides of the transfer sheet P using a two-sided original will be described.

The document D is set on the document tray 75 shown in FIG. 3 so that the first surface of the document D faces upward so that the topmost page is the first page, and is inserted in the direction indicated by the arrow F.

Thereafter, the original D is sent onto the contact glass 12 through the same process as in the above-described one-sided copy, and is scanned by the predetermined optical system 20 (FIG. 2). Similarly to the case, the driving roller 96 of the belt conveying device 90 rotates in the direction opposite to the arrow G in FIG. 3, the guide member 91 rotates to the position shown in FIG. 8, and the first gate claw 93 moves upward. , But the second gate claw 105 rotates clockwise.

Accordingly, the document D is conveyed to the left in the form of a switchback, and is sent between the guide member 91 and the first gate claw 93. The document D is conveyed to the conveyance roller 99 rotating in the direction indicated by the arrow in FIG. The second gate pawl is formed by the transport rollers 87b and 85b.
In a state in which the driving roller 96 is rotated in the direction indicated by the arrow G in a state where the driving roller 96 is guided by the lower surface of the 105 and further inverted so that the second surface faces downward while being guided by the guide plates 107 and 108, respectively. Then, it is sent onto the contact glass 12.

The stop of the document D on the contact glass 12 is controlled by the number of pulses (predetermined) from the time when the trailing edge of the document D passes the sensor 104, and the one-sided copy is performed. Similarly to the case, the trailing edge of the original D (eighth
(Left side in the figure) is stopped as the document scanning reference side.

Here, when the second surface is scanned by the optical system 20 and the exposure is completed, the driving roller 96 of the belt conveying device 90 rotates again in the opposite direction to the direction indicated by the arrow G in FIG. The pawl 105 switches to the position shown in FIG.

Accordingly, the document D is conveyed to the left in the form of a switchback, and as shown in FIG.
The first surface is fed downward between the gate claws 93 while being guided by the upper surface of the second gate claws 105 by the conveying roller 99 and the conveying rollers 87b and 85b rotating in the direction of the arrow. 6 is used together with the description of single-sided copying, etc., so that the image is written on the upper side). It is discharged and stacked.

In this way, the same operation is sequentially repeated for the originals of the second and subsequent pages, and the originals D are successively discharged onto the original discharge tray 10 with the first surface facing down. If they are taken out after stacking and turned over as they are, they are arranged in the order of the pages set on the document tray 75 first.

As described above, in the automatic document feeder 1 according to this embodiment, regardless of the copy conditions such as one-sided and two-sided copy,
A document D to be fed inserted from the document feed port 50a of the document feed section 50 shown in FIG. 1 is placed at a lower portion of the document feed port 50a as shown in FIG. Document exit
From 60a, the document is discharged onto the document discharge tray 10 (document D '),
Transfer paper (paper) on which the image of the original has been transferred by the copying machine body 2
P is received into the automatic document feeder 1 through the conveyance path 73, and is discharged from a paper discharge port 70a of a paper discharge section 70 disposed above and near the document feed port 50a as shown in FIG. It is discharged to 41.

Therefore, the operator who performs copying sets the original on the original tray 75 of each tray which is arranged substantially in parallel in the vertical direction as shown in FIG. When removing the original and transfer paper discharged to 10 and the paper output tray 41, do the work only by moving the arm while standing in the same position without bending or moving. You can make efficient copies and save labor.

Also, the original D to be fed and the original D 'to be discharged are
The document tray 75 also serves as a partition between them,
Further, since the original D to be fed and the transfer paper P on which the image has been transferred are separated by the paper discharge tray 41 which also serves as a partition therebetween, they do not mix at all.

The automatic document feeder is shown in FIG.
75 and the front of the original lung paper tray 10 (on the side of the machine)
When the document is opened, the document and paper can be easily taken in and out.However, the document tray 75 has a notch with a width that can be easily reached at a position corresponding to the center in the paper width direction. If it is formed along the direction (the left-right direction in FIG. 1), the document D 'discharged onto the document discharge tray 10 can be easily taken out from the front of the apparatus (right side in FIG. 1).

Also, in order to easily set and take out the original,
The discharge tray 41 and the document tray 75 may be rotatably supported on the left side in FIG. 1 so that they can be rotated upward.

While the embodiment in which the automatic document feeder according to the present invention is mounted on a copying machine has been described, the present invention can be similarly applied to a facsimile.

[Effects of the Invention] As described above, according to the present invention, it is possible for a copying operator to easily set a document without leaning or moving, and to discharge a document and Since the paper after image transfer can also be collected,
Efficient copying is possible with less labor.

In addition, since a document discharge port, a document feed port, and a paper discharge port are arranged in this order from the bottom, and a first partition and a second partition are provided therebetween, a document to be fed and a document to be discharged are provided. Since the original, the original to be fed, and the paper onto which the image is transferred and discharged are reliably separated by the partition,
Since they do not mix at all, the labor of the sorting operation can be omitted, and more efficient copying can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an automatic document feeder showing one embodiment of the present invention, FIG. 2 is an overall configuration diagram showing an entire copier equipped with the automatic document feeder, and FIG. 4 is a schematic configuration diagram showing, in an enlarged manner, a document feeding section, a document discharge section, and the vicinity of a sheet discharge section of the automatic document feeder shown in FIGS. 4 and 5; FIG. 6 to FIG. 8 are plan views showing different pressing states of the conveying rollers for explaining the pressing state, and FIGS. 6 to 8 are schematic configurations similar to FIG. FIG. DESCRIPTION OF SYMBOLS 1 ... Automatic document feeder, 2 ... Copy machine body 10 ... Document discharge tray (partition) 12 ... Contact glass, 20 ... Optical system 41 ... Discharge tray (partition) 50 ... Document supply Paper section, 50a… Original document feed port 60 …… Original document discharge section, 60a …… Document discharge port 70 …… Paper discharge section, 70a …… Paper discharge port 75 …… Document tray (partition) 79… … Calling roller, 81… Supply roller 82… Separation roller 85a, 85b, 87a, 87b, 99… Conveyance roller 86a, 86b… Arc guide plate 91… Guide member 93… First gate claw, 90 … Belt conveyors 101, 102… tray discharge roller 105… second gate claw, 106… lower discharge roller D… original, P… transfer paper (paper)

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B65H 29/22 G03G 15/00 107 G03G 15/00 530

Claims (1)

(57) [Claims] An automatic document feeder mounted on a device such as a copying machine for transferring an image of a document onto a sheet; a document feeder for feeding a document to a document scanning position of the device; A document discharge section for discharging the document scanned at the position, and a sheet discharge section for receiving the sheet on which the image of the document has been transferred by the apparatus and discharging the sheet from a sheet discharge port; The document feed port of the document feed section is arranged close to the document discharge port, and the sheet discharge port of the sheet discharge section is arranged close to the document feed port, and A first partition that separates a document to be fed between a paper discharge port and the document feed port and a document to be discharged is referred to as a document to be fed between the document feed port and the paper discharge port. A second partition for partitioning the discharged paper is provided, and the first partition is provided.
Wherein the length of the partition in the document feeding direction is longer than that of the second partition disposed above the first partition and substantially parallel to the first partition. .