JPS60159859A - Original supply device - Google Patents

Abstract

PURPOSE:To obtain an original supply device which copies an original group in order from the first page and attains easily single or double face copies from single face originals, single or double face copies from both face copies, and these recycle copies, by providing a passage through which originals are sent from a tary to an exposure part and are inverted even times and are returned to the tray, a passage through which originals sent from the tray to the exposure part are inverted odd times and are returned to the tray, and a passage through which originals are inverted once for the purpose or exposing rear faces of exposed originals. CONSTITUTION:An original D carried by pinch rollers 5A and 5B is sent onto a contact glass 7 and is transferred to feeding rolls 9-11; and when a sensor 16 detects the front end of the original D, rotation of feeding rolls is stopped, and the original D is stopped in a prescribed position on the glass 7. The original D is exposed to light in this position and is carried in the direction of a guide 12 again by feeding rolls 9-11. When the rear end of the original D is detected by the sensor 16, a branching plate 15 is switched, and the carried original D is stopped in the prescribed position on the glas 7 by reversing feeding rolls 9-11. In this state, the rear face of the original D whose front face is exposed beforehand is exposed to light. The original D after exposure is inverted along both branching plates 15 and 20 and is introduced into a guide 17 and is ejected onto an original tray 1 by feeding rolls 22A and 22B and is placed on originals D exposed to light before.

Description

Detailed Description of the Invention [Technical Field] The present invention automatically feeds originals one by one to an exposure unit starting from the bottom of a group of originals placed in an original tray, and exposes exposed originals to the original. The present invention relates to a document feeding device for an electrophotographic copying machine including a facsimile machine, which is returned onto a group of documents in a tray.

[Prior art]

When copying a large number of sheet originals using an electrophotographic copying machine, it is not possible to place the originals one by one on a contact glass, set them on a pressure plate, remove them after exposure, and replace them with the next original. This is extremely complicated, and in order to save this labor, an automatic document feed system that automatically feeds the originals placed in the document tray one by one to the exposure section and automatically ejects the exposed originals. devices are starting to be adopted.

When making multiple copies from a sheet original consisting of many pages, generally one sheet is set once on the contact glass and then the number of sheets corresponding to the number of copies made W15 are successively copied. Then, repeat this for the number of originals.
Normally, copies ejected from a copying machine are collated manually or by a sorter or other sorting machine to make the required number of copies with the pages in the same order. The time required to feed the document from the original position to the exposure section is short and can be almost the same as ib5 when the scanner returns.
One copy is made each time the original is sent to the exposure unit, and once a series of originals has been copied, the same operation is repeated the same number of times as the number of copies to be made, so that the number of copies with the same page order can be obtained. , collation work is not required.

In this case, if you use the automatic document feeder to feed the documents placed in the document tray one by one from the bottom to the exposure section, then return the document in the exposure section to the top of the group of documents in the document tray. It becomes possible to make the required number of copies by continuously encircling the manuscript a number of times equal to the required number of copies.

As a conventional manuscript handling #device like this,
The one described in Japanese Patent No. 5-16600 is known. In this method, the original is sent out from the bottom of a group of originals placed in the original tray, turned over once, and exposed until it reaches the contact glass of the lower exposure section.
*eThe document is inverted once more and returned to the document tray. In other words, in order to invert the original in the original tray and convey it onto the contact glass, for single-sided originals, place the original in the original tray with the original side facing upwards.
Copies will be sent out one by one starting from the first page, and copying will begin from the V end of the manuscript. Therefore, there is a drawback that when a subsequent page is added during copying, it cannot be copied in order.

In addition, this conventional technology is provided with a curved guide adjacent to the contact glass that inverts the original, but since there is only one path for returning the original to the original tray, recycling copying of double-sided originals becomes complicated. There are drawbacks.

〔the purpose〕

The present invention eliminates the drawbacks of the conventional ones mentioned above,
To provide a manuscript supply area lf that can be copied in order from the first page of a manuscript group, and that can easily perform single-sided or lpHfr copying from a single-sided manuscript, single-sided or double-sided copying from a double-sided manuscript, and recycling copies of these. The purpose is to

〔composition〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 schematically shows a document feeding device according to the present invention, in which a document tray 1 is opened at the top and on which a group of documents is placed.
The document tray 1 is arranged at a slight inclination so that the downstream side in the conveyance direction of the document tray is downward. A side guide (not shown) is installed on this document tray 1 in the width direction of the document tray 1. The originals of each size are positioned at D rectangular positions. Said! J) A sensor 2 is provided below the tray 1 to detect the presence or absence of a document in the document tray 1 and also detect information on a job sheet in which control data is written. Further, a supply row 23 is disposed below the document tray 1. The lowest document among the group of documents in the yA document tray 1 is made to protrude somewhat to the right side of the document tray 1. Further, on the right side of the document tray 1, a pair of upper and lower separation rollers 4A and 4B are arranged so as to press against each other, and the lower separation roller 24B rotates clockwise in the figure. On the other hand, the upper separating row 24A is either stopped or rotates clockwise at low speed due to some kind of vibration, and the two document stacks are separated by the female roller 4A.

When 4BIIJ51C is supplied, it is designed to prevent the upper Jjlt plucking from progressing. The reason why the upper separating roller 4A is rotated clockwise at a low speed is because if the document is always stopped at the same position, wear will progress only in that part.

A pair of pinch rollers 5A, 5B are disposed on the right side of the separation rollers 4A, 4B so as to press against each other,
Document Df protruded from document tray l by supply roller 3
It is designed to be held and transported. Note that the lower separation a-24B is provided with a one-way clutch, which is driven by the original document conveyed by the pinch roller 5A15B. Further, a sensor 6 is provided on the right side of the separation rollers 4A and 4B to control the rotation of the supply roller 3 and separation roller 4B.

It can be seen that a contact glass 7 of an exposure section is provided on the right side of the sensor 6, and the originals conveyed from the original tray 1 in a substantially horizontal direction are exposed on this contact glass 7. .

Also, there is a small space between the contact glass 7 and the contact glass 7. A pressure plate 8 is provided so that an original document passes between the contact glass 7 and the pressure plate 8. Further, openings (not shown) are formed in the pressure plate 8 at intervals in the direction of conveyance of the document document, and the feed rollers g, i (1, 11 for conveying the document Dt) are arranged so as to be in pressure contact with the contact glass 7. It is set up.

These rollers 911 (1111) are controlled by a single roller (not shown) to move in both forward and reverse directions.

In front of the contact glass 7, there is a curved guide P12 for inverting the document Di and returning it onto the contact glass 7.
is installed. This guide 12 includes two pairs of edge rollers 13A, 13B and 14A rotating in the direction of the arrow.
, 14B, the document is conveyed in the direction of the arrow Df. Near the upstream end of this guide 12, there is a branch plate 15 that can swing between a negative solid line position and a broken line position by a solenoid τ (not shown). It is arranged. This branch plate L5
acts as a guide to feed the star pattern on the contact glass 7 into the guide 12 when it is in the real 1' position, and acts as a guide to feed the star pattern on the contact glass 7 into the guide 12 when it is in the dotted line position. It is designed so that it does not get in the way when the original document is returned to the contact glass 7. The branch plate 15 is connected to the guide 12
The swing is controlled by a sensor 16 facing between the end of the contact glass 7 and the contact glass 7.

Above the contact lath 7, a guide 17 is disposed for conveying the document from the contact glass 7 in the horizontal direction of the tray tray 1, and two pairs of feeders rotating in the direction of the arrow are provided. Rollers 18A, 18B
, and 19A and 19B, the document is conveyed from right to left toward the original plate. The upstream end of this guide 17 is curved downward, and in the vicinity of this end, another branching plate that can swing between a solid line position and a broken line position is provided by a solenoid (not shown). This branch board is
When it is in the position shown by the broken line, it acts as a guide to prevent the document from entering the guide 12 from the contact glass γ and to feed it into the guide 17; The original document is fed into the guide 12 and is guided so as not to interfere with the printing. Another horizontal guide 21 is connected to the F end of the self-guide 17 in a separate groove.
The downstream end of this guide 21 is connected to the roller 4A,
It is located almost directly above 4B.

Furthermore, a pair of feed rollers 22A and 22B are provided at the downstream end of the guide 21.

Another guide n is disposed directly above the document tray 1 at a distance from the guide 21, and the lower four parts of this guide invert the document Di and return it to the original 44 tray 1. In order to do this, it is bent approximately 1801tm toward F. This guide n has three pairs of feed rollers 24A, 2
4B; 25A, 25B and 26A.

26B is arranged to transport the original aD in the direction of the arrow and return it into the document tray 1 from the end of the guide. A branch plate n that can swing between a solid line position and a broken line position by a solenoid (not shown) is disposed between this guide and the guide 21, and this branch plate 27
When it is at the solid line position, the original Dt from the guide 21 is evacuated so as not to get in the way of returning it as it is to the original tray 1, and when it is at the dashed line position, the original 4D from the guide 21 is sent to the guide O. Acts as a guide for busy people. Furthermore, both guides 2
Jam detection stations 28 and 29 are provided at the ends of questions 1 and 23 and the guide, respectively, for detecting the end of the document tray.

Note that the guides 21, 23, branch plate 27, feed rollers 22, 24, 25, 26, sensors A, 29, etc. are attached to the lid (
(to) can be opened and closed in one piece.

Next, the operation of the above-mentioned embodiment will be explained first from the general operation of the entire structure.

Lift the lid 3ot above the document tray 1, set the document to be copied onto the document tray 1 with the image facing downward, and determine the position of the side guides (not shown). Then, close the body 30t and press the start button (not shown)
Press. Then, the supply roller 3 rotates clockwise and sends out the documents in the document tray 1 toward the separation rollers 4A and 4B. The document sent out from the original tray 1 is reliably separated one by one by rollers 4A and 4B, and one document is sent to pinch rollers 5A and 5B. When the leading edge of the original document is detected by the nearby sensor 6, the rotational drive of the supply roller 3 and the separation roller 4B on the left side is stopped, and both of these rollers 3.
4B rotates as a result of the document conveyed by pinch rollers 5A and 5B.

The document conveyed by the pinch rollers 5A, 5B is sent onto the contact glass 7, and is transferred to the feed rollers 9, to, 11 on the contact glass 7, and the sensor 16 detects the leading edge of the document 4'4D. And feed roller 9, to? The rotation 14A of 11 is stopped, and the original <JiD is stopped at a predetermined position on the contact glass 7. Then, at this position, the document tray is exposed to light, and the document tray after exposure is transferred again to the feed rollers 9 and 10.
, 11 in the direction of the guide 12. At this time, the branch plate 15 is at the solid line position, and when the branch plate is also at the solid line position, the document is introduced into the guide 12, and the feed roller 13A is rotated in the direction of the arrow. , 13B in the direction of the arrow in the guide 12, and the feed rollers 14A and 14BK are passed. When the sensor 16 detects the rear end of this document, the branch plate 15 switches to the position shown by the broken line, and the feed roller 1
Document D being transported by 4A and 14B? The contact feeds onto the lath 7 and the feed rollers 9, 10 are in reverse rotation.
．． The original is carried in from the IHc with the entire contact glass 7- placed on top of the contact glass 7-, and is stopped at the original position 44 of the I5r foot. In this state, the back side of the previously exposed surface of the document on the contact glass 7 is in contact with the contact glass 7, and this side is exposed next. Therefore, 1
This means that both sides of the front side of the original sheet have been exposed.

The exposed document is conveyed to the right side of the contact glass 7 by the feed rows 29, 10, and 11, but at this time the branching plate 15 is again at the solid line position. On the other hand, the branch plate is at the position shown by the broken line, and the document is reversed along both branch plates 15 and 20 and introduced into the guide 17, and the feed rollers 18A and 1
8B, 19A, and 19B in the direction of the arrow, and delivered to the feed rollers 22A, 22B of the guy P21.

When the branch plate υ is at the solid line position, the document is discharged into the document tray 1 by the feed rollers 22A and 22B.
It is stacked on top of the previously exposed originals. In this case, a partition plate (not shown) is provided in the document tray 1 to partition the document tray before exposure and the document tray that has been exposed. This partition plate is designed to be able to move forward and backward, so that it does not become an obstacle for recycling copying. On the other hand, branch plate 2
When 7 is at the broken line position, the original is fed by the feed roller 24.
A.

24B into the guide n, and the feed roller 25A
, 25B, 26A, and 26B, the document is inverted within the guide and discharged into the document tray 1.

Next, the circulation state of the document will be explained by dividing it into various modes.

When making a one-sided copy from a one-sided original a) When making a partial copy Place the original set in the original tray 1 in the first
After feeding out one sheet at a time from page 2 to page 3 and stopping on the contact glass 7 for exposure, the document is guided along the branching plate 15 at the solid line position and the branching plate plate at the broken line position. 17, and is discharged into the document tray 1 from the guide 21 via the branch plate 27 located at the dashed line 1-. The image information of the original document ejected into the original tray 1 is directed downward, just as when it is taken out from the original tray 1. It is divided by a partition plate (not shown) that can move forward and backward. Note that the process ends when there are no more Fvc originals on the partition plate.

b) When making a copy of the number of copies, the path of the original is the same as that described in a above, but the original is placed on the contact glass 7 on the way, exposed to light the required number of times, and then returned to the original tray 1.

C) In the case of recycled copying, the path of the originals is the same as in a above, but each original is exposed only once on the contact glass 7 and returned to the original tray 1. Then, the end or restart of the document group is detected by the partition plate in the document tray L, and
The manuscript group first circulates for a fixed number of copies and then stops.

d) When making one copy (2 methods) The original path is the same as when making a single-sided copy 1- from a one-sided original as described above, and in this case, two methods
The originals in the tray are fed out one by one from the first page at the bottom to the second and third pages, and after the first page is exposed on the contact glass 7, it is returned to the original tray 1. And the first
When the page is evacuated from above the contact glass 7, the second page is conveyed from the document tray 1 onto the contact glass 7 and stands by. During this time, the recording sheet (not shown) on which the image information of the first page has been transferred passes through the fixing section of the copying machine, and is sent out again to the image forming section. The second page on the contact glass 7 is exposed at the same timing as this recording sheet, and the image information of the second page is transferred to the back side of the recording sheet that is reversed and fed again, and then fixed. The two-sided copy is completed.

-2 This is a method in which the group of documents in document tray L is circulated twice and removed with a double-sided saw. All documents are sent out from document tray L, but during the first circulation, , only the odd-numbered pages are exposed on the contact glass 7 to transfer the image information on only one side of the recording sheet, and during the second circulation, only the even-numbered pages are fully exposed and the image (image 1N) is already printed on one side. The image information of even-numbered pages is transferred to the back side of the recording sheet on which the information has been transferred to complete a double-sided copy.

e) When copying multiple copies Using the method d-1 described above, exposure is performed multiple times while the document is stopped on the contact glass 7 to complete double-sided copies of multiple copies.

f) In the case of recycled copying, the original Di is repeatedly circulated using the method d-1 or d-2 described above.

When making a single-sided copy from a double-sided original g) When making one copy There are two methods, i-2 method and this method, which will be described later.

The originals are fed out one by one from the bottom of the original tray 1, the first page of the original is first exposed on the contact glass 7, and then the exposed original is fed 9 to the right side of the contact glass 7. However, at this time, the branch plate 15 is at the solid line position, and the branch plate beauty is also at the solid line position 1tVc. Therefore, the document from the contact glass 7 is transferred to the sub-branch plate 1.
5.20 and is introduced into the curved guide 12. When the sensor 16 detects the rear end of the document passing through the guide 12 while being reversed, the branch plate 15 is switched to the position shown by the broken line, and the path of the document being conveyed from the guide 12 onto the contact glass 7 is changed. The document is moved away so as not to interfere with the contact glass 7, and the document advances to that point and stops on the contact glass 7. At this time, since the second page on the back side of the original document faces the contact glass 7, this second page is exposed. Thereafter, the document tray is sent out to the right side of the contact glass 7 again, but at this time, the branch plate 15 returns to the solid line position, and on the other hand, the temporary branch position has been switched to the dashed line position, so that the document tray is sent out to the right side of the contact glass 7. .20 into the guide 17.

At this time, since the branch plate n of both guides 211z3+dl is at the solid line position, the document material is ejected into the document tray 1 from between the guides P21 and P21.23. It should be noted that since this document is inverted when it is introduced from the contact glass 7 into the guide 17, it is discharged into the document tray 1 with the original first page facing downward.

Note that the ejected original g4D is neatly aligned with the document tray below in the document tray 1 by side guides and end plates (not shown).

h) When making multiple copies Use method g described above to continuously expose both sides of each original document multiple times on the contact glass 7. 1) When making recycled copies (method 2) i-1 Method g described above. Repeat to obtain the required number of copies. --2 This is a method in which the originals in the original tray 1 are circulated twice to create one copy. That is, during the first circulation, only the odd-numbered pages are fully exposed, and during the second circulation, only the even-numbered pages on the back side of each document sheet are exposed.

During the first circulation of original documents, image information is transferred to recording sheets corresponding to odd-numbered pages, recording sheets corresponding to even-numbered pages are fed blankly, and all recording sheets are transferred to the intermediate tray of the copying machine (Fig. (not shown).

Therefore, the recording sheets in the intermediate tray are alternately stacked with those to which image information has been transferred and those with blank sheets. Then, during the second circulation of the manuscript, the image information of even-numbered pages is transferred to only the blank recording sheets sent out from the intermediate tray, and the image information of the first circulation A and floor plan J is transferred. The recorded recording sheet is fed blankly.

J) When making one copy (method 2) This is almost the same as method g described above, but the difference from method g is that the even-numbered pages of the document returned from the guide 12 onto the contact glass 7 are exposed. The only point is that the image information is transferred to the back side of the recording sheet to which the image information of odd-numbered pages has been transferred.

-2 This is a method in which odd-numbered pages are exposed during the first circulation of the manuscript, and even-numbered pages are exposed during the second circulation.

That is, the originals Dt in the original tray 1 are fed out one by one starting from the lowest one, stopped on the contact glass 7 and exposed, and then transferred to the branching plate 15 located at the solid line position and the branching plate added at the broken line position. The guy who follows and writes the manuscript 1
71c, and is discharged from the guide 21 into the document tray 1 via the branch plate 27 located at the solid line position. Since this document tray is turned over once when it passes through the branch plate 15, 21, when it is returned to the document tray 1, it is stored with the front and back sides and front and back reversed. In this way, the original sheets are fed one after another, and the odd-numbered pages are exposed first, and the even-numbered pages are exposed when the original sheet is circulated at the 2nd tm.

Therefore, if the image information of the second even-numbered page is transferred to the back side of the recording sheet on which the image information of the odd-numbered page has been previously transferred on one side, a double-sided copy is completed.

k) When making multiple copies The odd and even pages are transferred onto one recording sheet using the method g described above, and each image information is exposed multiple times in succession on the contact glass 7.

l) For recycled copying (2 methods) Transfer odd and even pages to one recording sheet using method g described above,
Circulate the original as many times as necessary.

-2 The necessary number of copies is obtained by repeating the j-2 method described above.

As described above, according to this embodiment, in addition to being able to easily perform various types of copying, since copying always starts from the first page of the document group, the document D-i of the subsequent page can be copied easily. It is possible to add it to the document tray 1.

FIG. 2 shows a second embodiment of the present invention, in which a curved guide 32 is provided in place of the guide 121c in the first embodiment. The end of the guide 32 in this embodiment is in contact with the contact glass 7, and the direction in which the document is conveyed within the guide 32 is opposite to that of the guide 12 in the first embodiment. Further, in the first embodiment, the guide t2.
Two branch plates 15 and 20 were provided near the guides 117, but in this embodiment, one branch plate 33 may be provided between the guides 17 and 32.

The second embodiment can also achieve the same effects as the first embodiment described above.

FIG. 3 shows a third embodiment of the present invention, in which a curved guide 42 is provided at the original tray 1 and the contact glass 71 in place of the guide 12 in the first embodiment. In this embodiment as well, it is sufficient to provide one branch plate 34e between the guide 42 and the contact glass 7, and the guide 17 is in contact with the contact glass 7. In addition,
35A, 35B'; 36A, 36B; 37 A
, 37B are feed rollers.

The third embodiment can also achieve the same effects as the first embodiment described above.

〔effect〕

As described above, the document feeding device according to the present invention has a first path for linearly feeding the document from the document tray to the exposure section, inverting it an even number of times, and returning it to the document tray, and a first path for feeding the document straight from the document tray to the exposure section. a second passage for inverting the original that has been sent out odd times and returning it to the original tray, and a third passage for inverting the original once to expose the back side of the exposed original.
Since it has a passageway, various types of copying can be easily carried out, and it has an excellent effect that the order of copying will not be disrupted even if all originals are added.

[Brief explanation of the drawing]

FIGS. 1, 2, and 3 are schematic front views showing embodiments of the document feeding device according to the present invention. D... Original, 1... Original tray, 7... Contact glass, 12.17, 21.23... Guide, 15
e 20 , 27 , 33 . Ah... the branch board. Applicant's agent Kiyoshi Inomata

Claims (1)

[Claims] A document tray for placing a group of documents, an exposure section for exposing the documents, a means for transporting the documents in the document tray one by one from the lowest one to the exposure section, and returning the exposed documents to the document tray. a first path for linearly feeding a document from the document tray to an exposure section, inverting it an even number of times, and returning it to the document tray; A second path for inverting the document sent out in 1 an odd number of times and returning it to the document tray, and a third path for inverting the document t-1 times to expose the back side of the exposed document. Document feeding device.