JPS62105829A - Automatic original feeder - Google Patents

Abstract

PURPOSE:To facilitate the automation of double-sided copying by mounting a plurality of originals en bloc on an original feed tray to sequentially feed them to a bed glass for copying, returning the both-side copying original to an overturning-accumulating section and then feeding it again to the original bed glass. CONSTITUTION:A plurality of originals to be copied are en bloc mounted on an original feed tray 40 and transferred 50 one by one by a take-out roller 41 to be set on an original bed glass 5 by an endless belt 52. When the copied original is a one side copying one, it is further transferred in the direction of arrow (a) and accumulated on an original discharge tray 46 through a dis charge path 60. When said original is a double side copying one, the endless belt 52 is rotated in the opposite direction to the arrow (a) so that said original is transferred by rollers 63, 65 after a gate 51 is changed over, overturned through a transfer path 66 and accumulated on an overturning-accumulating section 44. After the originals on said tray 40 is exhausted, the originals on said section 44 are sequentially transferred 45, 48 and set on the original bed glass 5. Thus, the automation of double-sided copying is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to an improvement in an automatic document feed #a position installed in a copying apparatus.

[Technical background of the invention and its problems]

2. Description of the Related Art In recent years, many types of copying apparatuses for copying original images have been put into practical use that are equipped with an automatic original feeder.

However, conventional automatic document feeders take out the documents one by one and guide them onto the document table glass, which is the feeding section.
After the copying operation is complete, the original is ejected from the original platen glass.

Therefore, when copying a double-sided original, the operator has to redo the ejected original through the printers 1 to 7, which is extremely troublesome. In addition, when the ejected original is re-operated, there is a problem that if the ejected original is not ejected in reverse, it is easy to misdirect the original, resulting in copying mistakes. be.

(Object of the Invention) The present invention has been made based on the above-mentioned circumstances, and its object is to provide an automatic document feeder which has a simple configuration and which enables double-sided copying by simply setting the document once. This is what we are trying to provide.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention allows multiple originals to be copied to be copied at once. a document supply section for placing the originals, a document take-out means for taking out the documents one by one from the document supply section, and a document take-out means for sending the documents taken out by the document take-out means to the supplied section, and also transferring the documents after the copying operation is completed to the supplied section. a document transport means for ejecting a document from the supply section; a document return means for returning a document to be double-sided copied from the supply section after one-sided copying is completed; a reversing stacking unit that temporarily stacks originals to be double-sided copied with their front and back sides reversed; a double-sided copying original take-out unit that takes out the originals in the reversing stacking unit one by one in order to transfer them to the original transporting unit; The apparatus is configured to include a discharged document stacking section that stacks the documents discharged from the supplied section by the conveyance means.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic longitudinal sectional front view of an image forming apparatus equipped with an automatic document feeding IAM according to the present invention, and its configuration is as follows.

In the figure, 1 is a copying apparatus as an image forming apparatus, and 2 also serves as a mounting table on which the copying apparatus 1 is placed.
In order to form multiple images or double-sided images on
This is a direction changing transport device that leads to In addition, 3 is the copying device 1
This is an automatic document feeder, which will be described later, which is attached to the top surface of the document feeder and automatically feeds the document A.

The copying apparatus 1 has the following configuration.

That is, 4 in the figure is a main body of the copying machine, and on the top surface of this main body 4 of the copying machine, a document table glass 5 is provided as a feeding section on which the document A sent by the automatic document feeder 3 is placed. At the same time, an operation panel (not shown) is provided at the front edge of the top surface.

In addition, a paper feed force cell l-7 is provided on the right side of the copying machine main body 4.
, 8, and 9 are installed. Further, the cassette cover 10 of the upper paper feed cassette 7 serves as a manual paper feed tray 11 for manually feeding paper P as appropriate.

A drum-shaped photoreceptor 12 is located approximately in the center of the copying apparatus main body 4.
is installed, and a charging device 1 is installed around it.
3. An exposure device 14, a two-color color developer 115, a transfer device 16, a peeling device 17, a cleaning device 18, and an afterimage erasing device 19 are arranged in this order.

In addition, there is a paper feed cassette "F-7" in the lower part of the copying machine main body 4.
. The discharge section 22 provided on the left side of the copying apparatus main body 4 passes through the image transfer section 21 between the transfer device ff16 and the transfer device ff16.
A paper conveyance path 23 is formed that leads to.

Further, a pair of aligning rollers 24 is arranged on the upstream side of the image transfer section 21 of the paper transport path 23, and a fixing device 25 and a pair of paper ejection rollers 26 are arranged on the downstream side.

The exposure optical device 14 scans the document A fed onto the document table glass 5, forms an image on a photoreceptor 12 as an exposed portion which is rotated in advance, and uniformly charges the document A with a charging device 13. An electrostatic latent image is formed on the photoreceptor 12.

The electrostatic latent image formed in this manner is developed by facing the developing device 15, and then sent to the image transfer section 21 facing the transfer device 16, and the developer image is transferred to the aligning roller pair 24. The image is then transferred onto the paper P that is sent in. Next, the paper P on which the image has been transferred is transferred to a peeling device 17.
After being peeled off from the photoreceptor 12, the sheet is guided through a conveyance path 23 to a fixing device 25, where image transfer is performed, and then discharged to a discharge section 22 via a pair of discharge rollers 26.

In the case of single-sided image formation, the sheets go straight through the gate section 27 and are carried out onto the discharge tray 28, and in the case of multiplex or double-sided image formation, they are transferred to the direction changing conveyance device 2 via the gate section 27. It is meant to be guided.

On the other hand, the surface of the photoreceptor 12 after the developer image has been transferred to the paper P faces a cleaning device 18 to clean residual developer (toner) remaining on the photoreceptor 12, and then an afterimage erasing device 19, the potential on the photoreceptor 12 is lowered below a certain level to enable the next copying operation.

Furthermore, the automatic paper feeder 20 of the copying apparatus main body 4 includes:
Take-out rollers 30 are arranged corresponding to the paper feed cassettes 7, 8, 9, respectively, and each of these take-out rollers 3
A pair of separation rollers 31 for separating two sheets of paper is provided on the paper take-out direction side of No. 0.

On the other hand, the above copy v! The automatic document feeder 3 mounted on the upper surface of the printer 11 has a configuration as shown in detail in FIG.

That is, there is a document feed tray 40 as a document supply unit that places a plurality of documents A to be copied at once, and a take-out unit that serves as document take-out means to take out the originals 1iA of the document feed tray 40 one by one. A roller 41 and a document conveying means 42 that feeds the document A taken out by the take-out roller 41 to the document table glass 51 as a supplied section and discharges the document A from the document table glass 5 after the copying operation is completed. have.

Further, a document return means 43 for returning 8% A of the originals A fed onto the document table glass 5 by the document conveying means 42 onto the document table glass 5 after single-sided copying is completed from the document table glass 5; A reversing tray 44 as a reversing stacking unit temporarily stacks the originals A to be double-sided copied returned by means 43 with their front and back sides reversed, and the originals A on this reversing tray 44 are transferred to the original transporting means 42. A take-out roller 45 serves as a document take-out means for double-sided copying that takes out one sheet at a time for delivery, and a document receiver 46 serves as a discharged document stacking unit that accumulates the documents A discharged by the document conveying means 42.
It has a configuration comprising:

The document receiver 46 is formed by a concave portion formed on the upper surface of a cover 47 provided in a vertical direction of the document conveying means 42 .

Further, the document conveying means 42 has the following configuration. That is, a pair of separation rollers 48 and four pairs of aligning rollers are sequentially arranged in the document take-out direction of a take-out roller 41 arranged opposite to the document feed tray 40, and a paper feed guide 50 and a switching guide 51 are also arranged. The situation is as follows. Further, a white endless conveyor belt 52 is stretched across the document table glass 5 . This white endless conveyor belt 52 has a driving pulley 53, a driven pulley 54, and a roller 55 for pressing the belt.
. . , is in a state where it is stretched around the belt tension pulley 56 and the guide pulley 57.

The document A taken out by the take-out roller 41 is
The second and subsequent sheets are separated by a pair of separation rollers 48, and only the uppermost document Δ is supplied, and then the tilt of the leading edge of the document A is corrected by four pairs of aligning rollers.

The document A is guided by a paper feed guide 50 and a switching guide 51, and is fed between a white endless conveyor belt 52 and a document table glass 5. Then, the conveyor belt 52 runs endlessly in the forward direction by a drive device (not shown), that is, so that the portion in contact with the document table glass 5 moves in the direction of arrow A, thereby conveying the document A onto the document table 5. Further, after the copying is completed (after the exposure is completed), the original A on the original platen glass 5 is guided to the original ejection path 60.

Also, does the document ejection path 60 have a horizontal U-shape? Manuscript A
The sheet is configured to be discharged into the document receiver 46 in an inverted state, and a pair of paper discharge rollers 61 are provided at the terminal end of the document.

Note that the original A sent onto the original platen glass 5 to be copied is positioned by abutting against an original stopper 62 disposed along the edge of the original platen glass 5. The original stopper 62 is rotatable by a stopper driving means (not shown), and its free end protrudes above the part of the original table 5 when the original is fed in, and is lowered when the original is ejected.

Further, the document return means 43 includes a white endless conveyor belt 52 that constitutes a part of the original IWI conveyance means 42 and can run in reverse by a belt drive means (not shown), and a document feeder when the conveyor belt 52 runs in reverse. direction (opposite arrow A direction), and pairs of document transport rollers 63, 64, which are sequentially arranged below the reversing tray 44. and a conveyance guide 65, and is adapted to feed the document A on the document table glass 5 to a document discharge path 66. The document output path 66 is horizontally U
It has a character shape, and is configured such that the document A is carried out 19 onto the inversion 1 to lay 44 in an inverted state.

The switching guide 51 provided at the confluence of the document feed path and the original return path is swingable by a drive means (not shown), and when the document is fed, it is in the state shown by the two-dot chain line in FIG. Moreover, when the original shipment is returned, it is positioned as a solid line.

Next, the operation of the above embodiment will be explained.

Documents A and 1 are set in batch on the document feed tray 40.
... are taken out one by one by the take-out roller 41, separated into one sheet by a pair of separating rollers 48, and then the leading inclination is corrected by a pair of aligning rollers 49, and the paper feed guide 50 and switching The document is guided by a guide 51 and sent between the document table glass 5 and a white endless conveyor belt 52 running in the direction of arrow A. Manuscript A
As the conveyor belt 52 travels, the document is fed until its leading end abuts the document stopper 54.

Next, when copying only one side of this original 11A,
After the copying operation (exposure operation) is completed, the original plate 1-flange 62 is lowered, and the white endless conveyor belt 52, which was running in the direction of arrow A, runs again in the direction of the arrow to eject the original A from the original platen glass 5. The document will be discharged onto the document tray 46.

In addition, when copying both sides of the original A, the original 8iA fed onto the original platen glass 5 as described above is returned from the original platen glass 5 after one-sided copying is completed, and then the original 8iA is transferred to the reversing toner.
44 and temporarily stack it upside down.

That is, by running the conveyor belt 52 in the opposite direction (opposite to the direction of arrow A) and setting the switching guide 51 to the solid line state shown in FIG. I-ray 44 for inverting original A
Return to top.

Then, when the document supply tray 40 runs out of documents A, the documents A temporarily accumulated in the reversing tray 44...
The documents are taken out one by one via the take-out roller 45 and sent onto the document table glass 5, after which they are discharged onto the document receiver 46.

In this way, when copying both sides, suppose that images a and b are placed on the document supply tray 40 as shown in FIG.
A document Att having images C1d on both sides, a document A2 having images C1d on both sides, and a document A3 having images e and f on both sides are images a and C, respectively.

If e is set all at once with the bottom side facing down, the originals Ar and A on the reversing tray 44 after one-sided copying are
2, the accumulation order of A3 is reversed as shown in Figure 5,
Also, images f, d, and b are positioned on the bottom surface.

The original IAx on this reversing tray 44.

When A2 and A3 are taken out and automatic double-sided copying is completed, they are stacked on the document receiver ( ) 46 in the same state as when they were set on the document supply tray 40, as shown in FIG.
There is no need to rearrange the originals AI, A2, and A3.

On the other hand, during double-sided copying, the bottom surface of the paper P that is fed into the direction changing conveyance device 2 after single-sided copying and temporarily stacked in the 6th copy 70 has an image a as shown in FIG.
, c, and e.

c' and e' are formed, and these are taken out one by one via the take-out roller 718, the pair of separation rollers 72, etc., and are fed back into the copying machine by the switchback section 74. Both sides are copied, and as shown in FIG. 8, P... has copied images b', d' corresponding to original images S, d, f.

f' will be formed.

〔Effect of the invention〕

As explained above, the present invention includes a document supply section that places a plurality of documents to be copied at once, a document take-out means that takes out the documents one by one from the document supply section, and a document take-out means that takes out the documents one by one from the document supply section. a document transporting means for feeding the original to the feeding section; a document returning means for returning the original to be double-sided copied from the feeding section after one-sided copying is completed among the originals sent to the feeding section by the document feeding means; a reversing stacking section for temporarily stacking the originals to be double-sided copied returned by the document return means with their front and back sides reversed; and a double-sided copying section for taking out the originals in the reversing stacking section one by one in order to transfer them to the original 1 conveying means. The structure includes a document ejecting means, a document ejecting means for ejecting the original from the supplied section after the copying operation is completed, and a discharge original accumulating section for accumulating the originals ejected by the document ejecting means. Therefore, although it has a simple configuration, it is possible to provide an automatic document feeder that can perform double-sided copying by simply loading the original paper once.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic longitudinal sectional front view of the automatic document feeder of the present invention installed, and FIG. 2 is a schematic longitudinal sectional view of the automatic document feeder of the present invention. The front view, FIG. 3 is a partially enlarged view of FIG. 2, FIGS. 4 to 6 are explanatory diagrams showing the state of the original, and FIGS. 7 and 8 show the state of the paper on which the original image is copied. FIG. A... Document, 3... Automatic document feeder, 5... Feeding section, 40... Original take-out means (take-out roller),
42... Original conveying means, 4... Original returning means, 44
. . . Reversing stacking section (reversing tray), 45 . . . Original take-out means for double-sided copying (take-out roller), 46 . . . Ejected original stacking section (original receiver) 4 Fig. 4 Fig. 5 Fig. 6 Figure 7 Figure 8

Claims (2)

[Claims] (1) A document supply section that places a plurality of documents to be copied at once, a document take-out means that takes out the documents one by one from the document supply section, and a document feed section that takes out the documents taken out by the document take-out means. a document conveying means for feeding the document to the supply section and ejecting the document after the copying operation has been completed from the supplied section; a reversing stacking section for temporarily stacking the originals to be double-sided copied returned by the original returning means with their front and back sides reversed; An automatic document feeder comprising: a document take-out unit for double-sided copying that takes out one sheet at a time; and a discharged document stacking section that stacks the documents discharged from the supplied section by the document transporting device. (2) The automatic document feeder according to claim 1, wherein the discharged document stacking section stacks the discharged documents in the same stacking state as when they are set in the document feeding section.