JPS6247042A - Original inverting type automatic original feeding device - Google Patents

Abstract

PURPOSE:To make the work of arranging originals in order of page unnecessary by ejecting the original as it is if the front face of the original is copied when the copying operation is stopped but inverting and ejecting the original if the rear face is copied then. CONSTITUTION:When the front face of the original is copied, a stopper operation signal outputted from a CPU 45 is stopped simultaneously with turn-on of a copy stop button 41 and a motor forward rotation signal CW is outputted. As the result, a stopper 9 raised till then is removed from a path and an original feeding motor 47 is rotated forward to eject the original as it is. When the rear face of the original is copied, the stopper 9 is removed from the path by the instruction from the CPU 45 simultaneously with turn-on of the copy top button 41 and the original feeding motor 47 is reversed, and then, a carrying belt 6 is moved in the direction opposite to that for original feeding to lead the original to an inverting part, and the original is inverted there. The original feeding motor 47 is switched to forward rotation after a prescribed time, and the inverted original is ejected by the carrying belt.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic document reversing type automatic document feeder that always discharges documents in the order of pages when copying a plurality of double-sided documents.

(Prior art) In many conventional copying machines, when copying multiple originals, the user places the originals one by one on the original table and replaces them, but when the number of originals to be copied increases, the originals are scanned. The replacement work is quite difficult. Recently, an automatic document feeder has been developed and put into practical use that allows multiple documents to be stacked in a predetermined position and then automatically fed one by one onto the document table and copied. There is.

By the way, there are many so-called double-sided originals that have content that you want to copy on both sides, so automatic document feeding devices that can be used for such double-sided originals are also being considered. The device □ first copies the front side of the original, then reverses the original, copies the back side, and outputs it, then copies the front side, □ back side in the same way, and so on.
The originals are ejected one after another, but with this type of automatic document feeder, the copy paper gets jammed while copying multiple double-sided originals (so-called □Yuru-jam), or you want to interrupt copying for some reason. Sometimes. In such cases, the original is ejected once, but if the back side of the original is being copied, there is no problem in ejecting it as is, but if the front side is being copied, if the original is ejected as is, the original and pages ejected so far will be lost. The problem is that they are not in the correct order and then have to be rearranged.

(Objective and Structure of the Invention) The present invention has been made in view of the above-mentioned points, and is an automatic document feeder with a document reversing type that ensures that the documents are always ejected in the order of the pages when copying multiple double-sided documents. To achieve this purpose, when the copying operation is stopped, the front side of the original is ejected as it is, and when the back side is being copied, the original is reversed. When the front side is being copied, the original is reversed and the original is ejected, and when the back side is being copied, the original is ejected as is.

(Example) The present invention will be explained below based on the drawings.

FIG. 1 shows the document reversing type automatic document feeding device according to the present invention in combination with the main body of a copying machine, where A surrounded by a broken line is the automatic document feeding device and B is the main body of the copying machine. The example shown is a type in which the front and back sides of a double-sided original are each copied onto two sheets of copy paper.

The automatic document feeder is used to stack documents and place documents.
&, a placing plate l, a feed roller 2 that feeds out only the uppermost document, a feed belt 4 that feeds the fed document in cooperation with a double feed prevention roller 3, and A roller 5 for feeding the original and a conveyor belt 6 for transporting the fed original to a fixed position on the glass original table.
, a document reversing guide 7 , and three sets of reversing rollers 8 a , 8 b , and 8 c arranged along the document reversing guide 7 , and a guide roller 6 a disposed along the conveying belt 6 .

6b and 6c are arranged. This conveyor belt 6 is driven by a drive roller 6d, and is switched between a forward rotation direction indicated by a solid line arrow and a reverse rotation direction indicated by a broken line arrow between it and a driven roller 6e. A stopper 9 is provided near one end of the conveyor belt 6 to stop the conveyed document at a fixed position on the glass document table. Electromagnetically driven. 10 is a document discharge tray for storing discharged documents;
Reference numeral 11 denotes a document discharge sensor that detects that a document has been discharged.

In such a document reversing type automatic document feeder, a feed roller 2, a double feed prevention roller 3, a feed belt 4, a document feed roller 5. Drive roller 6d of conveyor belt 6, reversing rollers 8a and 8b arranged along document reversing guide 7
, 8c are configured to be driven by one document feeding motor via a clutch, a crank, and a gear, respectively.

On the other hand, the copying machine main body B utilizes a conventionally known electrophotographic process, and is provided below the document reversing type automatic document feeding device A described above.

The structure of the copying machine body is well known and is not the gist of the present invention, so it will be briefly explained. 20 is a paper feed cassette that stores copy sheets P in a stack, and 21 is a topmost copy sheet P.
22 is a paper feeding guide plate, 23
1 is a rotating drum having a photoreceptor 23a on its surface, around which a charger 24, a developing device 25, a transfer device 26, a separator 27, and a cleaning device 28 are sequentially arranged.

On the other hand, a glass document table 29 is provided on the top surface of the copying machine body, and the document to be copied is placed in a fixed position in order to be exposed to light.
A movable mirror 31, 32, a fixed mirror 33, and a lens 34 are arranged to guide reflected light from the original onto the photoreceptor 23a.

35 is a conveyor belt that conveys the copy paper separated from the rotating drum 23 after transfer to a fixing position; 36 is a fixing device; 37
is a paper ejection sensor provided in a path for ejecting the copy paper after fixing to the paper ejection tray 38.

Note that the copy paper feed roller 21 inside the copying machine main body, the rotating drum 23, and the developing sleeve 25a inside the developing device 25
, the conveyor belt 35, the heating roller 36a of the fixing device 36,
The optical scanning system and the like are configured to be driven by a motor separate from the original feeding motor provided in the automatic original feeding apparatus A.

52 is a block diagram of a control circuit relating to document ejection control in the document reversing type automatic document feeder shown in FIG. 1.

In the figure, 40 is a copy start button that is turned on when copying starts, 41 is a copying 1F button that is turned on when canceling the copying operation or clearing the set number of copies, and 42
is the double-sided copy button that is turned on when copying a double-sided original, 4
3 is a copy number setting button consisting of a numeric keypad for setting the number of copies you want to make, 37 is a paper discharge sensor that also appeared in FIG. 1, 44 is a copy start button 40, and a copy stop button 41.
A memory 45 temporarily stores information such as the operation state of the double-sided copy button 42, the number of copies set by the number of copies setting button 43, and the output state of the paper ejection sensor 37; A CPU 46 determines whether the front side or the back side is being copied according to a predetermined program and outputs a command to reverse the document or eject the document. Reference numeral 46 is a drive circuit that drives the document feed motor 47. is configured to drive at least the drive roller 6d of the conveyor belt 6 via the clutch and gears as described above. In addition, a copy start button 40, a copy stop button 41, a double-sided copy button 42, a copy number setting button 43, a paper ejection sensor 37, a memory 44, a CPU 45,
The drive circuits 46 are both provided in the main body of the copying machine, and the CPU 45 controls both the automatic document feeding sequence of the automatic document feeding device and the sequence of the electrophotographic process within the main body of the copying machine.

Next, the operation will be explained using FIG.

First, to explain the normal copying operation with reference to Fig. 3 (a), place the double-sided originals of the copy plate that you want to copy on the original plate A, stacking them in page order from the top with the odd-numbered pages facing up. After setting the number of copies using the number of copies setting button 43 (no need to set if the desired number of copies is one), press the copy start button 40
When you turn on (i3[gi). 6. ) Hey 55. -month 4
,7,. □The series of rollers of the automatic document feeder rotates (see (b) in the same figure). As a result, the uppermost document on the document storage plate l is sent out by the feed roller 2, and the feed belt 4 and the feeding roller 5 and sent to the conveyor belt 6. The document is then conveyed by the conveyor belt 6 toward a fixed position on the glass document table 29. Also, at this time, the stopper 9 is activated and protrudes forward of the document conveyance path (see (C) in FIG. 3(A)).

On the other hand, on the copying machine side, in preparation 7 of the electrophotographic process,
(shown by the broken line as (d) in Figure 3 (a)),
The rotating drum 23a, the developing sleeve 25a, and the heating roller 36a of the fixing device 36 rotate, and as the conveyor belt 35 begins to move, the heater of the heating roller 36a is energized.

When the original comes into contact with the stopper 9 and comes to rest at a fixed position on the glass original platen 29 (the front side of the original (odd page side) is facing downward), a series of steps begins with the exposure of the original by the optical scanning system. The electrophotographic process begins (Figure 3 (a)
(see (d)).

The visible image thus formed on the photoreceptor 23a is transferred to the copy paper P fed from the paper cassette 20, fixed by the fixing device 36, and ejected to the paper ejection tray 38; The paper ejection sensor 37 is turned on by the copy paper being printed.

The desired number of copies set using the number of copies setting button 42 is stored in the memory 44.

The CPU 45 counts the output from the paper ejection sensor 37, and repeats the above-described electrophotographic process until the counted value matches the desired copy number data stored in the memory 44.

When the CPU 45 determines based on the output from the paper ejection sensor 37 that copying for the set desired number of copies has been completed, the drive circuit 46
Outputs the motor reverse rotation signal CCW. As a result, the document feed motor 47 rotates in reverse.

The document, which had been in a fixed position until then, is conveyed by the conveyor belt 6 (moving in the direction of the broken line arrow) in the opposite direction to the direction in which it was fed and guided to the first reversing section. That is, the original is passed through the original reversing guide 7 by the reversing rollers 8a and 8b.

It is transported in the direction of the arrow by 8C. During this time, the rotation direction of the document feed motor 47 is switched, and the conveyor belt 6 is again moving in the direction of the solid arrow.

The original that has been reversed is then conveyed to a fixed position by this conveyor belt 6, stopped by a stopper 9, and stopped at a fixed position on the glass original table 29 (Fig. 3 (A)).
(see (b)). At this time.

The back of the original is facing down. Original feed motor 47
CP after a predetermined time after entering the document reversing operation described above.
Stopped due to stop signal from tJ45.

Thereafter, a series of electrophotographic processes are performed on the back side of this document, and the document is ejected. At this time, the paper discharge sensor 33 detects the paper discharge. The same operation is repeated for the desired number of copies, and when the last copy sheet is ejected, the stopper 9 leaves the document transport path, and the CPU 45 outputs a motor reversal signal CCW, and the document is fed via the drive circuit 46. The motor 47 rotates in reverse, and the copied original is guided to the reversing section where it is reversed, and then the original feeding motor 47 is switched to normal rotation to be ejected and the next original is fed. The document discharged to the document discharge device IO in this manner has its back side facing up and its front side facing down.

The above is a normal copying operation.Next, the document ejecting operation when the copy stop button 41 is pressed during the copying operation will be explained with reference to FIGS. 3(B) and 3(C) and the flowchart of FIG. 4.

FIG. 3(b) shows the case where the copying stop operation is performed while the front side of the document is being copied, and FIG. 3(c) shows the case where the copying stop operation is performed while the back side of the document is being copied.

As shown in FIG. 4, the CPU 45 presses the copy center button 4.
It constantly determines whether or not 1 is turned on (F-1),
When it is turned on, it is then determined whether or not a double-sided original is being copied at that time by checking whether the double-sided copy button 42 is on or off (F
-2). If you are not copying a double-sided original, then you are copying a single-sided original, so you can just eject the original as is, but if you are copying a double-sided original, the first step is to determine whether you are copying the front side or the back side of the original ( F-3), this determination is performed as follows. In other words, before copying, press the number of copies setting button 4.
3, the desired number of copies is set, and the desired number of copies data is stored in the memory 44, so if the CPU 45 counts the signal output from the paper ejection sensor 37 for each document, the count value, It can be determined whether the front side or the back side of the document is being copied from the desired copy number data.

As a result of the determination, if the front side of the original is being copied, the screen shown in Figure 3 (b)
As shown in FIG. 3, when the copy stop button 41 is turned on (see (a) in FIG. 3(b)), the stopper operation signal output from the CPU 45 is stopped, and the motor normal rotation signal CW is output. As a result, the stopper 9 that had been up until then comes off the path (see (c) in the same figure), and the document feed motor 47
rotates in the normal direction (see figure (b)). In this way, the original is ejected as it is (F-4), and the original feeding motor 47 is stopped at the timing of the falling edge of the output signal from the original ejection sensor 11 (see (d) in the figure).

On the other hand, as a result of the determination in step (F-3), if the back side of the original is being copied, as shown in FIG. 3 (c),
When the copy stop button 41 is turned on (see figure (a)), the stopper 9 is removed from the passage by a command from the CPU 45 (see figure (c)), and the document feed motor 47 is reversed (see figure (c)).
(See figure (b)). As a result, the conveyor belt 6 moves in the opposite direction to the direction in which the original is fed, guides the original to the reversing section, and reverses the original there (F-, 9). The document feed motor 47 switches to normal rotation after a predetermined period of time, and the reversed document is ejected by the conveyor belt 6. The motor 47 stops at the timing of the falling edge of the output signal from the document ejection sensor 11 (see (d) in the figure).
reference).

In this way, when the front side of the original is being copied, the original is ejected as is, and when the front side of the original is being copied, the original is reversed and ejected, so that the front side of the original is facing down and the back side is facing up. All of the documents are aligned with the originals that have been ejected to the ejector 10.

In the above embodiment, the case where the copying stop operation is performed during copying is exemplified, but the case where the copying paper becomes jammed in the main body of the copying machine can also be handled in the same way.

This is because in order to increase the copying speed with high-speed machines, the original is already ejected and the next original is fed or set before the copy paper that has undergone electrophotographic processing is ejected from the main body of the copying machine. In such a case, if copy paper that has already undergone electrophotographic processing becomes jammed, the original set at that time must be ejected. Further, in the above embodiments, a copying machine that copies a double-sided original onto one side of copy paper was exemplified, but the present invention is not limited to this, and can be similarly applied to a copying machine that copies a double-sided original on both sides of copy paper. Furthermore, it goes without saying that the originals may be placed on the original storage board of the automatic original feeder so that the even-numbered pages are facing upward. The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims.For example, in the embodiments, when copying is stopped, when the front side document is being copied The original is ejected as is, and when the back side is being copied, the original is reversed and ejected; In some cases, the original may be ejected as is.

(Effects of the Invention) As explained above, the present invention provides an automatic document feeder with a document reversal type, in which when the copying operation is stopped, when the front side of the document is being copied, the document is ejected as it is.
□□ If the back side is being copied, turn the original over and eject it.
Since all originals are always ejected in the same direction, the pages are arranged in the same order, which is convenient for handling the originals □ later. Therefore, there is no need to subsequently arrange the page order of the manuscript.

[Brief explanation of drawings]

Figure 1 shows the automatic document feeding system with document reversal according to the present invention □
Figure 2 is a schematic diagram showing the device in combination with the main body of a copying machine, and Figure 3 is a block diagram of the document ejection control circuit of the automatic document reversing type automatic document feeder according to the present invention. Original reversing type automatic document feeding device according to the present invention:
Time chart of copying operation using near distance, (b)
□ and (c) are the document ejection operation timings using the same device.
Figure 4 is a flowchart of the original ejecting operation according to the present invention. ■...Document placement plate, 6...Transport belt, 7...Document reverse: rotation guide, 9...Stopper, 37...
- Paper discharge sensor, 40... Copy start button, 41...
Copy stop button, 42...Double-sided copy button, 43...
・Copy number setting button, 46...Document feed motor patent applicant Roku Konishi Photo Industry Co., Ltd. Agent Patent attorney Hiroshi Suzuki Man'#! 1vlJ Figure 2 Mum Figure 3 (B) On (C) - (a) #5qht: y>t, 1. (d) for Pell) Bu11. Figure 4

Claims (1)

[Claims] a document reversing device; a copy side determining device for determining which side of a double-sided document is being copied; Original ejector that operates to reverse and eject the original when the back side is being copied, or to reverse and eject the original when the front side is being copied, and to eject the original as is when the back side is being copied. 1. A document reversing type automatic document feeding device comprising: means for reversing documents.