JPH0634124B2 - Copying device - Google Patents

Description

Description: TECHNICAL FIELD The present invention sends a copy paper sheet having a copy image formed on its first surface to an intermediate paper feeding device, and re-feeds the copy paper sheet from the intermediate paper feeding device. The present invention relates to a copying apparatus that forms a copied image on a surface.

2. Description of the Related Art According to the copying apparatus of the above-mentioned type, it is possible to form a copy image on both sides of a copy sheet, and it is also possible to obtain a plurality of copy sheets in which the page order of the copy image is uniform.

In this way, when a series of copying operations are performed in order to obtain a plurality of copy papers arranged in page order, a copy re-fed from the intermediate paper feeding device for forming a copy image on the second side. Paper
When a transport trouble occurs in the transport path, the copy paper is removed from the transport path, and the copy image already formed on the first surface of the removed copy paper is newly replenished. It is necessary to form it on the first side of the copy sheet and send it to the intermediate sheet feeding device.

At this time, if the copy paper on which the copy image is not formed remains on the second surface in the intermediate paper feeding device, the supplementary copy paper is fed from above the remaining copy paper to the intermediate paper feeding device. that time,
In order to arrange the page order of the completed copy paper stack, the supplementary copy paper stacked in the intermediate paper feeding device is re-fed with priority over the remaining copy paper, and the second copy of the removed copy paper is placed on the second surface. It is necessary to form a duplicate image that was or should have been formed on two sides.

However, when one intermediate paper feeding device is used, the supplementary copy paper stacked on the remaining copy paper cannot be re-fed with priority over the remaining copy paper. Therefore, in this case, discard all the remaining copy paper and restart the copying operation from the beginning, or do not replenish the copy paper and handle all the remaining copy paper, and then deal with the copy paper that has been lost due to transport trouble again. There is no other way than forming a copy image on both sides of the supplementary copy paper, and interrupting this on the copy paper bundle already discharged outside the main body of the copying machine.

In order to prevent such a problem, two intermediate paper feeding devices are provided, and the first intermediate paper feeding device is used during a normal double-sided copying operation, and the first intermediate paper feeding device is used during the operation.
If the copy paper that was re-fed from the intermediate paper feeding device causes a transport problem, remove it from the transport circuit and then
A copy image is formed on the first side of the newly replenished copy paper, the copy image is sent to the second intermediate paper feeding device, and then this replenishment copy paper is given priority over the copy paper remaining in the first intermediate paper feeding device. Then, the sheet may be re-fed from the second intermediate sheet feeding device, and a copied image may be formed on the second surface. By doing so, it is possible to eliminate all of the above-mentioned problems when one intermediate paper feeding device is used, and it is possible to efficiently obtain copy paper in which the page order is uniform.

However, in such a copying apparatus, since it is necessary to use two intermediate sheet feeding apparatuses, not only the cost is increased but also the size of the entire copying apparatus is increased and the structure is complicated. Absent. Further, since a transport path for guiding the copy sheet to the second intermediate sheet feeder is also required, this also leads to an increase in cost, a complicated structure, and an increase in size.

OBJECT The object of the present invention is to provide a copying apparatus in which the above-mentioned conventional drawbacks are eliminated.

In order to achieve the above object, the present invention sends a copy sheet having a copy image formed on a first side to an intermediate sheet feeding device, re-feeds the copy sheet from the intermediate sheet feeding device, and a second side thereof. In the copying apparatus for forming a copied image on the first sheet, the intermediate sheet feeding device is movably supported so as to occupy the lowered position and the raised position, and the copied image formed on the first surface of the intermediate sheet feeding device is displayed. On the intermediate tray on which the copy sheets fed upward are placed, and when the copy sheets stacked on the intermediate tray are re-fed from the lowest copy sheet, the intermediate tray on the intermediate tray occupying the lowered position The first feeding unit that comes into contact with the lower surface of the lowest copy sheet to feed the copy sheet, and the copy sheet that has been re-fed from the intermediate sheet feeding device is removed from the conveyance path due to a conveyance trouble. , Is newly replenished and a copy image is formed on the first side. Second re-feeding means for feeding the supplementary copy paper, which comes into contact with the upper surface of the supplementary copy paper on the intermediate tray in the raised position when the supplementary copy paper is re-fed and sent to the intermediate paper feeding device. We propose a copying machine equipped with.

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

The copying machine shown in FIG. 1 includes a copying machine main body 1 and a document circulation type automatic document feeder (Recircuratin) mounted thereon.
g Automatic Document Feeder (hereinafter referred to as RADF) 2 and a copy paper final processing device 4 including a stapler 3 connected to the copying machine main body 1. First, the general configuration of this copying apparatus and its basic operation mode will be briefly described.

The RADF 2 is arranged on the upper portion of the copying machine main body 1, and the document D is set on the paper feed tray 5 and the right paper feed belt 6. The lowermost original is fed rightward in the drawing by the operation of the belt 6, and is conveyed around the clockwise rotating roller 7 as indicated by an arrow A, and is fixed to the copying machine main body 1. It is fed onto the contact glass 8 by a conveyor belt 9 placed opposite thereto, and is left stationary at a predetermined position (original illumination section). At this time, the original has its image surface facing the contact glass 8.

On the other hand, the copying machine main body 1 supports a photosensitive drum 10 which is driven to rotate in a counterclockwise direction, and an image forming means including a charging charger 11, a developing device 12 and the like is arranged around the photosensitive drum 10, and above the drum 10. The image forming optical system 14 including the light source 13 is arranged, and the original document stopped on the contact glass 8 is illuminated by the light source 13 which scans and moves in the direction of the arrow, and the reflected light passes through the optical system and the charger 11
To reach the surface of the photoconductor drum 10 which is charged by, thereby forming a latent image corresponding to the original image on the drum 10. This latent image is visualized by toner as it passes through the developing device 12. This visible image is transferred onto one surface (first surface) of the copy paper C that is selectively supplied from the first or second paper supply device 15 or 16 to the photosensitive drum 10, and the transferred copy is obtained. The image is fixed by the fixing device 17.
The residual toner on the drum 10 is cleaned by the cleaning device 18.

After the illumination processing by the light source 13 is completed, the document is conveyed by the conveyor belt 9
Is re-actuated to the left, conveyed around the turn roller 19 and returned to the paper feed tray 5 (arrow B),
The originals are stacked with the image surface facing upward from the other originals stacked here. Therefore, the copy operation can be continued while sequentially circulating the set original document for the number of repeats.

The other side of the copy paper on which the copy image is formed on the first side (second side)
When a copy image is also formed on the surface), the copy sheet is fed into the reversing guide 21 of the reversing device 20, and its traveling direction is switched from the direction of arrow E to the direction of arrow F, and this is fed to the intermediate paper feeding device 22. It is sent to the intermediate tray 23. At this time, the copy sheets are stacked on the intermediate tray 23 with the first surface on which the copy image is formed facing up. This tray 23 is usually 5
It is usually constructed so that 0 to 100 copy sheets can be stacked.

If this copy paper is re-fed from the intermediate paper feed device 22 toward the photoconductor drum 10 as indicated by an arrow G, a copy image can be formed on the second surface thereof. The copy paper passes through the fixing device 17 again, and after the image on the second surface is fixed, the copy paper is discharged from the copying machine main body 1 as shown by an arrow H without being reversed by the reversing device 20.

As described above, according to the illustrated copying apparatus, the copying paper on which the copied image is formed on the first surface is sent to the intermediate paper feeding device 22, the copying paper is re-fed from the intermediate paper feeding device 22, and Copy images can be formed on two sides.

In addition to the above-mentioned double-sided copying, single-sided copying and composite copying are possible. However, since these operation modes are well known per se and are not directly related to the present invention, the description thereof will be omitted. Further, other detailed processes of the copying operation are well known, so that further description will be omitted. The flow state of the original when copying a double-sided original having images formed on both sides will be described later.

The copy paper discharged from the copying machine main body 1 is carried into the copy paper final processing device 4, and when the switching guide plate 24 occupies the position of the chain line, it is discharged as it is to the paper discharge tray 25 to be the final copy paper. It Further, when the guide plate 24 is switched to the position indicated by the solid line, the copy sheets are placed on the stapler tray 26, and when the number of the copy sheets reaches a predetermined number, the stapler 3 automatically binds the copy sheets to the surface of FIG. On the other hand, the bundle of copy papers discharged and ejected to the doggytail 27 capable of swinging to the back side and the front side are separated one by one.

Next, with reference to FIGS. 2 to 5, an example of an operation for aligning the page order of copy images formed on a plurality of copy sheets and the details of the copy operation at that time will be clarified.

Now, as shown in FIG. 3 (a), the originals D1 to D10 from page 1 to page 10 have their image surfaces facing up on the paper feed tray 5 of the RADF 2 as indicated by numbers 1 to 10. It is supposed to be set for. These originals are fed one by one to the contact glass 8 as described above (arrow A), but the fed originals are copied every other sheet. That is, when the lowermost 10th page of the document D10 is fed onto the contact glass 8, the document image is fed from the first or second sheet feeding device 15 or 16.
1 is copied onto the first side of the copy paper, and the copy paper is stacked on the intermediate tray 23 with the first surface on which the copy image is formed facing up according to the above-described mode. The stacking state of the first copy papers at this time is shown in FIG.
Is the first copy paper). The copy paper C1 is not immediately re-fed, and remains in the stacked state until the predetermined operation is completed.

The document D10 on the tenth page is returned to the side of the paper feed tray 5 again, and following this document, the document D9 on the ninth page is fed to the contact glass 8. However, the original D9 passes through the contact glass 8 as it is without being copied, and is returned onto the tenth page original D10 on the paper feed tray 5.
Next, the document D8 on the 8th page is sent to the contact glass 8. This document is copied on the first surface of the second copy paper C2 (FIG. 3 (b)) fed from the paper feeding device. ,
This copy paper C2 is also first stacked on the intermediate tray 23.
The copy paper C1 is placed from above.

Similarly, the fourth document 7 of page 7 fed to the contact glass 8 is returned to the paper feed tray 5 as it is without being copied, and the next document D6 of page 6 is the third copy paper C3 (third copy paper C3). A copy is made on the first side of FIG. 3B, and this copy paper C3 is also stacked on the intermediate tray 23.

This operation is performed for all the originals, and as a result, as shown in FIG.
Five copy sheets C1 and C on which page-by-page original images are copied
2, C3, C4 and C5 are stacked from the bottom in the order in which they are copied. At this time, the documents D are stacked on the paper feed tray 5 in the same page order as at the beginning.

After the above-mentioned operation is completed, the manuscript is again the lowest one.
The pages are sequentially fed one by one from the 0th page to the contact glass 8, but this time, the original that was not copied, that is, 9 pages,
The original image of the odd-numbered pages such as page 7 is copied. At this time, the original image of the original D9 on the ninth page is the image of the original D7 on the seventh page on the second surface of the first copy paper C1 re-fed from the intermediate paper feeding device 22 to the photosensitive drum 10. Is the second copy of the second copy paper C2.
It is sequentially copied to the surface.

When these copy sheets are ejected from the main body 1 and stacked on the stapler tray 26, the page order becomes the same as the page order of the original as shown in FIG. Is completed. Therefore, by binding the copy sheets as they are with the stapler 3, it is possible to obtain a copy sheet bundle having uniform pages. By repeating such an operation for the number of repeats, a predetermined number of copy sheet bundles can be obtained without collating the copy sheets. be able to. The same applies when the copy paper is discharged to the discharge tray 25.

By the way, the copy sheets stacked on the intermediate tray 23 as shown in FIG. 3 (b) must be re-fed in order from the lowest copy sheet C1. The page order of the copy sheet bundle is also out of order. For this purpose, the intermediate sheet feeder 22 in this example is configured as shown in FIG. 2 and described below.

In FIG. 2, the intermediate paper feeding device 22 has the above-mentioned intermediate tray 23, a first feeding means 37 and a second feeding means 41 which will be described later, and the intermediate tray 23 has the pivot pin 28 at the right end thereof.
Is rotatably supported in the direction of the arrow, and is movably supported so as to occupy the lowered position shown by the chain line and the raised position shown by the broken line. As described above, the intermediate tray 23
When the copy paper is loaded into the intermediate tray 23,
It is located as shown by the solid line in the figure. The copy paper sent from the reversing device 20 in the direction of arrow F is discharged onto the intermediate tray 23 by the discharge rollers 29 or 30. A branch guide plate 31 for switching between a solid line position and a chain line position is located on the left side of the discharge roller 29, and when the copy paper is long, the branch guide plate 31 occupies the solid line position. The paper is directly discharged to the intermediate tray 23 by the discharge roller 29 (arrow 1), and when the length is short, the guide plate 31 is switched to the position of the chain line, and the copy paper passing through the discharge roller 29 is as indicated by arrow J. It is guided by this guide plate 31 and is discharged to the intermediate tray 23 by the other discharging roller 30. The discharged copy paper is sent in an oblique direction, for example, an oblique feed roller 3 made of sponge.
2, one side plate of the intermediate tray 23 (not shown)
Along with, correctly positioned and stopped.

In this way, the intermediate tray 23 is connected to the intermediate paper feeding device 22.
The copy paper fed with the copy image formed on its first side facing upward is placed on the paper. FIG. 3 (b) shows the state of the copy paper (C1 to C5) at this time. It is shown schematically.

When re-feeding these copy sheets, the intermediate tray 23 is rotated counterclockwise around the pivot pin 28 and brought to the lowered position shown by the chain line. At this time, the two rollers 3
The lowest paper of the stacked copy papers is applied to the upper surface of the feeding belt 36 of the first feeding means 37 having the feeding belts 36 and 35 wound around the feeding belts 36 and the suction device (not shown). Contact. In this case, a notch 33 is formed in the left end portion area of the intermediate tray 23, that is, the intermediate tray portion corresponding to the leading edge area of the stacked copy papers, and the contact between the lowest copy paper and the feeding belt 36 is guaranteed. To be done.

The oblique feed roller 31 retracts upward as shown by the chain line, the feeding belt 36 is driven in the direction shown by the arrow, and the suction device sucks the lowermost copy sheet downward as shown by the arrow K. As a result, the lowest copy paper is sent out from the intermediate tray 23 as indicated by arrow G1 and is fed to the photoconductor drum 10 as described above (arrow G).

In this way, when the copy sheets stacked on the intermediate tray 23 are re-fed from the lowest copy sheet, the first feeding unit 37 causes the lowest copy on the intermediate tray 23 which has occupied the lowered position. The copy paper is sent out by contacting the lower surface of the paper. As a result, the page order of the finally obtained copy paper bundle is not disturbed.

When the copy sheet is re-fed by the rotation of the feeding belt 36, air is blown to the tip of the copy sheet as indicated by an arrow L.
It is advantageous to apply a separating action to each copy sheet so that double feeding can be prevented more reliably.

It is, of course, possible to employ a sheet feeding roller, or a sheet feeding means using a sheet feeding roller and a friction pad, as known per se, instead of the belt 36 and the air feeding device.

When two-sided originals having images formed on both sides are set in the RADF paper feed tray 5, for example, when five double-sided originals D11 to D15 with reference numerals 1 to 10 are set as shown in FIG. First, the lowermost original D11 is fed in the A1 direction by the rotating roller 7 which rotates clockwise, the rotation direction of the rotating roller 7 is switched to the counterclockwise direction in the middle thereof, and the original D11 is fed back in the direction of the arrow A2 while making contact. Send on the glass 8. By doing so, the document surface of the final page, that is, page 10 can be set toward the contact glass 8. After finishing the copy illumination process on this side, if it is returned to the side of the paper feed tray 5 as indicated by arrow B, the document D11 is stacked with the side of page 10 facing up. Next, the next original D12 is sent to the contact glass 8 in exactly the same manner, the surface of the 8th page is subjected to copying processing, and this is returned to the paper feed tray 5. In this manner, if all the images on one side of each original are copied, the original images of every other page can be copied.

Next, the originals are successively fed again to the contact glass 8, inverted as shown by the arrows A1 and A2, and fed into the contact glass 8, so that pages 9, 7, 5 ... Can be copied.

If the same result can be obtained, an appropriate original document conveyance processing method known per se other than the above-mentioned method, for example, a method of inverting the original document after the illumination processing may be adopted. The other copying operation modes are the same as those for the one-sided original.

As described above, whether the original is a single-sided original or a double-sided original, by copying the original image every other page, a copy sheet bundle in which the page order is uniform can be obtained. ,
After being fed from the intermediate paper feeding device 22 for copying on the second side, when this causes a transport trouble such as a jam (paper jam) in the transport path in the main body 1, the copy paper is as follows. Is processed.

When a copy sheet that has been re-fed from the intermediate sheet feeding device 22 and has not been discharged to the outside of the main body 1 causes a jam, the copy operation is stopped by the detection signal, and the jam position display section 40 is displayed.
The jam location and the position of the copy paper to be removed are displayed in (FIG. 1). The operator accordingly removes the jammed copy paper from its transport path and either pushes a reset switch (not shown) after removal or closes the door (not shown) of the copier body 1. As a result, the reset signal is output, and the copying operation can be restarted.

Here, it is necessary to replenish the copy paper corresponding to the removed copy paper. Therefore, the RADF 2 is operated as known per se, and while circulating the original, an original corresponding to the copy image formed on the first surface of the jam copy paper is called and set on the contact glass 8, and the original image is The sheet is fed from the first or second sheet feeding device 15 or 16 (FIG. 1) to make a copy on the first side of a new supplementary copy sheet.

Here, in order to make the operation related thereto easy to understand, the third copy paper C3 shown in FIG.
Considering, as an example, a case where a jam occurs after being re-fed from No. 3, the jam copy paper C3 is removed by the operator as described above, and thereafter, the defective copy paper C3 is removed.
Document D6 of the 6th page corresponding to the image of the 6th page formed in 3
Is called from the paper feed tray 5 onto the contact glass 8, and the original image of page 6 is copied onto the first side of the new supplementary copy paper.

This replenished copy paper is reversed by the reversing device 20 like other copy papers, and is fed to the intermediate paper feeding device 22 with its first surface facing up. At this time, as shown in FIG. 5 (a), the two copy sheets C4 and C5 having the copy image formed on the first surface thereof remain on the intermediate tray 23 of the intermediate sheet feeding device 22.
The replenished copy paper (this is referred to as NC) is discharged onto the remaining copy paper C5 by the discharge rollers 29 or 30 (FIG. 2) (FIG. 5 (b)).

Next, the original corresponding to the copy image formed on the second surface of the defective copy paper C3 or to be formed, that is, the original D5 of the fifth page is called on the contact glass 8 and the image is newly reproduced. The copy is made on the second side of the copy paper NC. For this purpose, a new copy paper NC is added to the intermediate paper feeding device 22.
Therefore, it is necessary to re-feed the residual copy papers C4 and C5 with priority.

In order to obtain such an operation, the intermediate sheet feeding device 22 is provided with the above-mentioned second feeding means 41 above the first feeding means 37 as shown in FIG. The illustrated second feeding means 4
As is known per se, 1 has a paper feed roller 42 which is rotationally driven in the clockwise direction, and a friction pad 43 which is opposed to the paper feed roller 42. When the new copy paper NC is re-fed, the intermediate tray 23 is rotated to the raised position shown by the broken line in FIG. 2, and the leading end of the copy paper NC on the intermediate tray 23 is pressed against the paper feed roller 42. When the roller 42 starts to rotate in the clockwise direction, the copy paper NC is sent out by the frictional force with the roller 42, and when it passes between the roller 42 and the friction pad 43, the double feed is blocked, and the replenishment copy paper NC is supplied. Is re-fed as indicated by an arrow G2 (FIG. 5 (b)), and is sent to the photosensitive drum 10 as indicated by an arrow G. It is desirable that the pressure contact position between the paper feed roller 42 and the copy paper NC is a position avoiding the notch 33 of the tray 23 so that a predetermined pressure contact force can be obtained.

In this way, after the copy sheet re-fed from the intermediate sheet feeding device 22 is removed from the conveyance path due to a conveyance trouble, the copy sheet is newly replenished, a copy image is formed on the first side, and the intermediate sheet is fed. When the supplementary copy paper fed to the paper device 22 is re-fed, the second feeding unit 41 abuts the upper surface of the supplementary copy paper on the intermediate tray 23 in the raised position and delivers the supplementary copy paper. .

As described above, the supplementary copy paper NC is re-fed in preference to the remaining copy papers C4 and C5, and the original image of the fifth page is copied on the second surface of the copy paper NC. It is ejected and stacked on the already ejected copy sheets C1 and C2.

After re-feeding the copy paper NC, the intermediate tray 23 is returned to the position of the chain line, and the remaining copy papers C4 and C5 are re-feeded from below by the first feeding means 37, and the second surface thereof is contacted. The original images of the third and first pages called on the glass 8 are copied, discharged to the outside of the main body, and stacked on the copy paper NC. Therefore, the page order of the copy paper bundle outside the main body is arranged in a predetermined order, and the defective copy paper can be automatically replenished without any trouble. When the number of remaining copy sheets is one, it is possible to re-feed the copy sheets by the second feeding unit 41.

Although the preferred embodiment of the present invention has been described above, the present invention can be modified in various ways, and the present invention can be applied when an automatic document feeder other than RADF is used, for example.

Effect According to the present invention, the intermediate tray occupying the lowered position and the raised position, the first feeding means for feeding the lowest copy paper on the intermediate tray at the time of normal paper re-feeding, and the supplementary copy paper are fed. Since the intermediate paper feeding device having the second feeding means for feeding the supplementary copy paper when paper is used, the intermediate paper feeding device is used even when the copy paper re-fed from the intermediate paper feeding device causes a conveyance trouble. It is possible to reliably re-feed the new supplementary copy paper sent to the paper device from the intermediate paper feeding device. Moreover, since it is sufficient to use only one intermediate paper feeding device, it is possible to reduce the cost of the copying machine, simplify the structure, and reduce the size.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing a copying machine according to an embodiment of the present invention,
FIG. 2 is a sectional view showing the details of the intermediate paper feeding device, and FIGS. 3 (a), (b), and (c) are the movements of the documents, the stacking state of the copy papers in the intermediate tray, and the final copy paper bundle. 4A and 4B are explanatory views showing a stacking state of the sheet, FIG. 4 is an explanatory view showing a method of processing a double-sided original, and FIGS. 22 ... Intermediate paper feeding device, 23 ... Intermediate tray 37 ... First feeding means, 41 ... Second feeding means C, C1, C2, C3, C4, C5, NC ... Copy paper D, D1 , D2, D3, D4, D5, D6, D7, D
8, D9, D10, D11, D12, D13, D14,
D15 ... manuscript

Claims (1)

[Claims] 1. A copy in which a copy sheet on which a copy image is formed is fed to an intermediate sheet feeding device, the copy sheet is re-fed from the intermediate sheet feeding device, and a copy image is formed on the second side. In the apparatus, the intermediate sheet feeding device is movably supported so as to occupy a descending position and an ascending position, and the copy image formed on the first surface of the intermediate sheet feeding device is fed upward. When an intermediate tray on which copy sheets are placed and the copy sheets stacked on the intermediate tray are re-fed from the lowest copy sheet, the lower surface of the lowest copy sheet on the intermediate tray occupies the lowered position. The first feeding means for feeding the copy paper by abutting against the sheet, and the copy paper being removed from the conveyance path due to a conveyance trouble of the copy paper re-fed from the intermediate paper feeding device, and then newly replenished. A copy image is formed on one side and sent to the intermediate paper feeder. And a second feeding means for feeding the supplementary copy paper by abutting the upper surface of the supplementary copy paper on the intermediate tray in the raised position when the supplementary copy paper is re-fed. apparatus.