JPS59197059A - Automatic carrying device of original - Google Patents

Abstract

PURPOSE:To centralize a driving system in one place to confirm easily original faces arranged in page order by separating and feeding out originals, which are placed on a tray, one by one in order from the lowest original and ejecting the read original from the same side as coming of the original. CONSTITUTION:An originals O which have original surface turned up and arranged in page order in placed on a tray 1 and separated and fed out successively in order from the lowest original by belts 3 and 5 which are rotated in directions opposite to each other. Since rollers 13 and 14 have a speed twice as high as the speed of a roller 2, a length is kept between the preceding original and the next original. The original O is exposed to light on a platen glass 9 and is ejected to a path 10 by a reversing roller 17 and is put on a partitioning plate on the tray 1. Consequently, an original feed driving part is centralized in one place because the original O is ejected from the same side as coming onto the glass 9, and the original surface is confirmed easily because original surfaces arranged in page order are turned up.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic document transport device that transports stacked documents to a reading position, reads the documents, and then discharges the documents from the reading position.

The following describes an example of an automatic document feeder used in a copying machine or the like.

First, as an example of a conventional Ryosoji DfJJ'ifi feeding device, there is one shown in the specification of U8P 3.556.512. A schematic diagram of this device is shown in (1st round).

In this apparatus, originals are stacked on a stacking tray with the original surface to be read facing downward (this state is shown in (■)). Then, the stacked originals are separated one by one and conveyed to a platen, the surface of the originals to be read is exposed, and then fed back and returned to the stacking tray (this state is shown in (2)).

However, with this device, the originals stacked in page order on the stacking tray are read from the bottom, starting from the first page.
In order to send the copies onto Ten, the copies are stacked in reverse page order (this state is shown in ■). Further, since the originals are stacked on the stacking tray with the reading side facing downward, there is an inconvenience in that it is difficult for the operator to check the original side.

In the figure, A is an automatic document feeder, B is a copying machine, C is a cassette, and D is a copy receiver. Also, numbers indicate pages.

Furthermore, as a conventional automatic document feeder, USP4, 16
There is one shown in the specification of No. 9.674. A schematic diagram of this device is shown in FIG. 1(B). In this device, originals are stacked on a stacking tray with the original surface to be read facing upward (this state is shown in (■)). Then, this f* original is separated one by one and transported by plateθni, and after the surface of the original to be read is exposed, it is returned onto the stacking tray from the side opposite to the side that enters the platen (in this state (shown in ■). That is, this device is configured so that a document sent out from the stacking tray passes through the platen and returns to the stacking tray again, forming a substantially closed loop.

However, in this apparatus, in order to form a closed loop for circulating the original, the drive system for transporting the original must be distributed throughout the apparatus.

In contrast, according to the present invention, originals can be stacked on the stacking tray with the original side facing upward, and copies can be obtained with the pages arranged in order.
The object of the present invention is to provide an automatic document conveying device whose drive system can also be integrated into a single-contact structure. A schematic diagram of an apparatus to which the present invention is applied is shown in FIG. 1(C).

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic document conveying device that can produce copies of pages that are aligned by stacking documents with the read document surface facing upward.

Another object of the present invention is to provide an automatic document feeder whose drive system can be made compact.

Still another object of the present invention is to provide an automatic document conveyance device that can be installed compactly in a copying machine, printer, or recording machine such as a facsimile machine.

That is, the present invention provides an automatic document feeder that transports a stack of documents to a reading position, reads nine sides of the document, and then discharges the documents from the reading and position. A supply means that separates and sends out the lowest document sheet by sheet among the documents; a first guide means that inverts the document sent out by the supply means and guides it to a position for reading; a document discharging means for discharging the document guided to the reading position and having its surface to be read read from the same side as when it entered the reading position; Since the document tray is inverted and has a second guide means that guides the document to the copy section, the document can be stacked with the document surface facing upward, and copies can also be obtained with the pages aligned. In addition, the drive system can be made compact.
The present invention provides an automatic rice feeding bowl for ljL drafts.

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

2, 3, 4(A), 4(B), 5, and 6 are examples of the present invention.

FIG. 2 is an external perspective view of an automatic document feeder according to an embodiment of the present invention, and FIG. 6 is a sectional view thereof. Note that FIG. 2 shows a state in which this apparatus A is installed on a main body B of a copying machine. Now, in Figures 2 and 6,
Reference numeral 1 denotes a stacking tray on which documents are stacked and set. This tray 1 supports originals O in pages with the last page at the bottom, and with the reading surface of each original facing upward. Further, the tray 1 is arranged so as to be tilted downward toward the document feeding direction so that the output side of the document feeder 9 is lowered. In this way, the fed documents are stacked together in the sending direction. Also 2゜2a
A feeding roller rotates the feeding belt 6 in the direction of arrow A to feed the document on the tray 1.

Furthermore, 4 and 4a are separation rollers, and the separation belt 5 is moved by the arrow B
By rotating it in the direction, the lowest original among the originals stacked on the tray 1 is separated from the feeding belt 6 one by one. The feed belt 5 and the separation belt 5 constitute a separation supply section S. The separating and supplying section S is provided at a height near the bottom of the documents stacked on the tray 1, which is tilted downward, and at a height where the contact portion between the belts 3 and 5 comes. Further, this supply section S is provided approximately at the center of the document 0.

Further, the first sheet nozzle 6 is formed between the guides 7 and 8, and moves the original separated sheet by sheet between the feeding belt 6 and the separation belt 5 onto the original platen glass 9 as a reading position. It is a passage that is not allowed. The sheet path 6 is provided in an arch shape between the separation supply section 8 and the end 9a of the platen glass 9, and the sheet path 6 is arranged in an arch shape between the separation supply section 8 and the end 9a of the platen glass 9. lead upwards. 1 fc? The 1X 2-sheet bus 10 is formed between arch-shaped guides 11 and 12, and is used to invert the document after image exposure by the illumination lamp L through the platen glass 9 and guide it to the stacking tray 1. It is a passageway. Here this second sheet lotus 1o
is provided facing the first sheet path 6, and extends from the end 9a of the platen glass 9 to the upper side of the separation belt 5 through the outside of the sheet path 6 (i.e., a path away from the belt 18). . The upper end 10a of the separation belt 5 of this sheet bath 10 is provided at approximately the same position as the circumferential surface of the roller 4a, and there is a discharge roller 2, which will be described later.
2, 22a are attached. The originals discharged from above the platen glass 9 are guided by the sheet path 10, and are fed from the feeding belt 6 and separation belt 5 in the direction in which the stacked originals are sent out (input direction>III (downstream side in the A direction)). The document will be discharged onto the tray 1 in the opposite direction (direction B in the figure).In other words, the direction in which the document is sent out from the tray 1 and the direction in which the document is discharged to the tray 1 are opposite to each other.Furthermore, 13 , 14 and 15 are sheet feed rollers, which transport the document passing through the sheet path 6 between the rollers 13 and 14 toward the platen glass 9.

A sheet path 10 feeds the document passing between rollers 14 and 15 toward a feeding tray 1. Further, reference numeral 16 denotes a flexible deflection plate, which is attached onto the guide 12 so that its tip is in contact with the guide 7.

The leading edge of the document that has passed through the sheet path 6 can be pushed aside and passed through. In addition, the original heading toward the sheet bus 10 from the platen glass 9 is
Since the tip is pressed by the guide 7, it is reliably guided to the bus 1°. Incidentally, this deflection plate 16 is made of a flexible sheet-like material such as mylar or thin plate stainless steel. Reference numeral 17.17a denotes a document conveyance roller, which rotates the document conveyance belt 18 provided along almost the entire width of the glass 9 to guide the document onto the platen glass 9, or move the document onto the platen glass 9. The original is transported to remove the upper original therefrom. The same roller 17 rotates in the direction of yawning C when conveying and setting the original onto the platen glass 9, and receives a signal from the sensor 25 when removing the original from the platen glass 9 after image exposure. The rotation direction is configured to change in the direction of the arrow.

When the conveyance roller 17.degree. 17a uses the roller 17 as a driving roller and the roller 17a as a driven roller rotated by the belt 18, there is a structural advantage that the drive systems cannot be integrated, and the document is conveyed on the walnut side of the belt 1B. In this way, the functional advantage of improved conveyance due to increased frictional force can be achieved at the same time. In addition, 19.20.21
l/) This is a presser roller that presses the belt 18 against the upper surface of the glass 9 to ensure that the belt 18 conveys the document and to obtain a clear image. Further, 22 and 22a are ejection rollers that kick out the original that has passed through the sheet path 10 onto the feeding tray 1. 25 more
, 25a, 24, and 25 are optical sensors, 26.degree. 23a detects the presence or absence of a document on the feed tray 1, and 24 detects the passage of the document in the sheet bus 6. Further, the sensor 25 detects passage of a document within the sheet bath 10.

Next, a document separating section to which an embodiment of the present invention is applied will be explained using FIGS. 3 and 4.

FIG. 4(A) is a top view showing the document separating section.

FIG. 4 (B+ is an enlarged main view of the partition plate).

FIG. 5 is a side view showing the document separating section.

In FIGS. 4A and 4B and FIG. 5, a partition plate 26 separates the original before exposure from the original after exposure. Note that one set of the partition plates 26 are provided at both ends of the separation supply section S so as to face each other. This partition plate 26 is supported by a fulcrum 28 on a partition plate arm 27.

Further, 29 is a friction plate, and an arm gear 62 engaged with a gear 31 fixed to a separation roller shaft 60 and a partition plate arm 270.
When the separation rollers 4 and 4a rotate, a load is applied to the partition plate arm 27 in the direction of arrow G. Here, the gear 62, the arm 27, and the friction plate 2.9
is attached to the shaft 32a. This facilitates document feeding from the supply tray 1. That is, the partition plate 26
The leading end of the document P is brought into contact with the belt 5, and the document P stacked from the belt 3 to the tray 1 is pressed against the belt 3, so that the lowest document in the stack can be reliably separated and conveyed. Furthermore, a roller 33 is attached via the feeding belt 3 to receive the load of the partition plate 26.

This further increases the force with which the partition plate 26 suppresses the document against the belt 3. 36 is a spring hung between the shaft 34 on the partition plate 26 and the shaft 35 on the partition plate arm 27;
As a result, the line connecting the axes 54 and 55 crosses the fulcrum 28, thereby moving the partition plate 26 in the directions of arrows E and F, respectively. Further, the outer periphery 57 of the partition plate 26 has a cam shape, and when the partition plate 26 and the partition plate arm 27 rotate in the direction of arrow C, a shaft 38 attached to a position that engages with the cam 37 moves the partition plate 26 to F. The device is configured to return to the same direction.

Reference numeral 39 denotes an optical sensor that detects the rotation of the partition plate arm 27 in the C direction, thereby making it possible to determine that one cycle of document copying has been completed.

Next, the drive section of the automatic manuscript conveyance device A will be explained using FIG. 5.

FIG. 5 is a sectional rear view showing the drive section.

In the figure, 41 is a motor and 42 is a motor pulley. In addition, the feed rollers 13, 14, 15 and the discharge roller 22
, 22a, a belt \45.44 is passed around pulleys 45, 46.47.

Furthermore, reference numeral 48 is a clutch that transmits drive from the motor 41 to the conveyance roller 7, and is capable of switching between forward and reverse rotation. 49 is a clutch that transmits drive from the pulley 47 to the feed roller 2 and separation roller 4. Note that among the rollers 5, 14, and 15, roller 4 is driven to rotate,
The roller 3.15 rotates accordingly. However, the invention is not limited to this, and for example, the roller 3 may be driven and other rollers may be driven.

As described above, in this embodiment, the drive units can be concentrated at one location without being dispersed.

Next, the operation will be explained.

A copy start button (not shown) on the main body, which is positioned with its tip in contact with the belt 5, and is stacked and set from the belt 3 to the tray 1.
In response to the ON signal, the feeding rollers 2, 2a and separation rollers 4, 4a rotate in opposite directions, thereby separating the sheets and feeding them into the sheet path 6 one by one.

At this time, since the feed speed of the feed rollers 13 and 14 is configured to be twice the feed speed of the feed rollers 2 and 2a, the trailing edge of the document fed after separation and the next document There will always be a gap between the tip of the At the same time, when the sensor 40 provided along the sheet path 6 detects this gap, the feeding rollers 2, 2a and the separating rollers 3, 5a
rotation stops. The leading edge of the document fed here is already at feed roller 1! ! 1.14, the document is conveyed by the feed rollers 13 and 14. The timer circuit starts working from the moment the rear end of the original pile is detected by the sensor 24 provided on the downstream side of the sheet path 6, until the document is conveyed to the document reference position on the platen 9 after a predetermined period of time has elapsed. After the elapse of time, the rotating roller 1
7 stops, the document is set at a predetermined position on the platen glass 9, and then stopped. Then, the exposure operation by the sink L1 on the copying machine main body side is started. That is, nine sides of the original are read. Next, when the ffn light completion signal E is received from the main body, the conveying roller 17 starts to rotate in the D direction in the reverse direction, and the original is discharged from the platen glass 9 onto the sheet path 10 by the belt 18.

That is, the original is ejected from the platen glass 9 from the same side as the original entered into the platen glass 9. and seat pass 10
The leading edge of the document passing through the roller 14 of the sheet path 10,
At the same time, the feeding roller 2 and separation roller 4 start rotating in response to a signal from the sensor 25, and the next coolant 8b is fed. At the same time, the conveying roller 17 changes its rotation direction in the C direction, but since the clamping conveying force of the rollers 14 and 15 is greater than the conveying force of the belt 18, the document is reliably ejected. The original that has passed through is sent to the row 222 from the same direction as the original feeding direction from the separation supply section S.
．． 22 and the partition plate 2 on the feeding tray 1.
It is piled on top of 6. At this time, since the feeding tray 1 is sloped so that the originals fall in the direction of the separating section, the leading edge of the originals hits the separating roller 3a after being pushed out by the rollers 22 and 22a. It will be in good condition.

Incidentally, reference numeral 50 is a static eliminator needle, which functions to eliminate static electricity from the originals that have passed through the sheet path 10 so that the originals can be loaded onto the feeding tray 1 smoothly. Hereafter, this operation is repeated, and as described above, the document to be discharged is discharged by the conveying force of the rows 214 and 15.

Further, the next document is conveyed onto the platen glass 9 by the conveying force of the rollers [, 14 and the conveying belt 18. At this time, the leading edge of the discharged document is detected by the sensor 25, and the edge of the document is detected by the sensor 25.
-) Even if the ninth original reaches the platen glass 9 by 3.5 rotations, the trailing edge of the ejected original may still remain on the platen glass 9 if the original is large in size. However, in this embodiment, since the belt 18 is made of urethane rubber or the like having a high coefficient of friction, the frictional force between this belt and the document reaching the platen glass 9 is
The friction force between the originals is greater than the frictional force between the originals 9, the ejected originals from above the platen glass 9 and the conveyance onto the platen glass 9, Ij
The X documents are conveyed in predetermined directions while sliding past each other. As a result, the interval at which documents are sent out from the processing supply section S can be shortened.

Next, a description will be given of the case where the last page of a plurality of original documents is to be fed. A partition plate 26 is present immediately above the last page. When the last page is fed, the partition plate 26 comes into contact with the feeding belt 3, so the friction between them causes the partition plate 26 to rotate in the direction of arrow E, and the force of the spring 36 causes it to be in the state shown by the two-dot chain line in the figure. Become. Here, since a load is applied to the partition plate arm 27 in the direction of arrow G by the friction plate 29, when the partition plate 26 is folded fC, it starts rotating in the G direction. Then, the feeding roller 2 and the separating roller 4
stops when the trailing edge of each document is detected by the sensor 40 installed on the downstream side of sheet bus B, so when the last page is fed, the partition plate arm 27 rotates and stops at the position indicated by the broken line in the figure. I will do it. When the sensor 39 detects the feeding of the final page and the partition plate arm 27, the final page returns to the feeding tray 1 after exposure and is completely
Feed roller 2 and separation roller 3 until the cycle ends
If the partition plate 26 is stopped and starts rotating at the first page of the second cycle, the partition plate 26 will be placed on top of the last page.

Further, FIG. 7 shows a block diagram of an electric circuit for controlling the operation of the automatic document feeder fA of this embodiment.

This is the control section of the main body of the copying machine that includes a QI BKJ CD microcomputer. C2 is a control unit consisting of a microcomputer for controlling the automatic document feeder, and is a well-known LEI device including ROM, RAM, ALU, 10 latches, etc. RI'T is an interrupt terminal of the microcomputer Q2. Revised. .

AI4. AI,,Ax,,,B Engineering. , B Engineering 1. B engineering 2.
B Engineering, CI. , CI1. C.I.

is the input boat. Also AOo, AOl, AO2
,'AO,,BOo.

Bol v BO2t BO,,Coo, col,
C02t C051DOO# ”'11 ”oy ”1
+EO2 and BO3 are output boats.

The control unit Q2 outputs a control signal to the output port in accordance with the input signal to the input port, and controls the operation of each part.

GK is a clock pulse detection sensor that detects a slit in a clock plate that rotates in synchronization with the above-mentioned conveyance roller 17, and uses, for example, a photo ink lageater consisting of a WD and a phototransistor.

Here, 50 is a platen sensor that detects the original on the platen glass 9, and 51 is a second ejection sensor that detects that the original is ejected from the platen glass 9 in the right direction in the figure. -Also, 52 is a partition sensor that detects the position of the partition plate 26 placed on top of a set of documents, and is composed of a Hall IC that detects a magnet attached to the partition plate 26. Further DS
W is an open/close switch that detects the open/close state of the upper cover of the separation supply section S.

Q3A, Q3B...Qi is a transistor array made up of transistors and the like. , 41 is a DC motor for driving the rollers of this device. This is an electric clutch for transmitting the rotational force of the motor 3 to drive the CL1 roller 2 in the direction of the arrow 1 in the figure.

CL2 is an electric clutch of the clutch 48 that transmits the rotational force of the motor 41 to drive the roller 17, and when the clutch CL2 is energized, the roller 17 rotates in the direction C in the figure.

CL3 is an electric clutch of the clutch 48 for rotating the roller 17 in the opposite direction to that described above, and the roller 17 rotates in the D direction when the illustrated clutch CL5 is energized. Note that the roller 13 rotates in the direction of the arrow shown when the clutches CL2 and CL3 are energized.

BK is an electric brake for stopping the row 217 with precision.

swl is a mode switch (not shown) operated by the user when using this device. sw2 is ADF or R
This is a select switch (not shown) that selects between DF and DF.

Note that RDF mode is a mode in which the copying operation is sequentially performed once for each document that is fed one after another, and the feeding operation is repeated for the specified number of copies. The feeding operation is stacked such that the copying operation for the specified number of sheets is performed continuously on one original document, and when the continuous copying is completed, the next original is fed and the continuous copying operation is performed again. In this mode, the process is repeated as many times as the number of originals created.

Furthermore, PLi is a lighting indicator that lights up when in ADF mode.

Ph3 is a lighting indicator that lights up in RDF mode. PL3
C01, C02, C05, Doo, DO,, Eoo, K
O4, EO2, EO3id control unit Q control unit side 1 signal is output.

In the embodiments described above, the original after copying is returned to the stacking tray, but the present invention is not limited to this. For example, the original after being read for the first time may be placed on a separate tray from the stacking tray. Even if it is ejected, it does not burn. That is, the stacking tray and the document receiver may be integrated or separate. Alternatively, for example, the two may be separated by a partition plate. Additionally, if each sheet path is made openable, jam handling becomes easier.

Furthermore, the feeding means for separating and sending out the documents on the stacking tray one by one is not limited to belts that rotate in opposite directions, but also known means such as rollers and rollers, or separation pieces that press against the rollers 2 and 2, etc. can be used. It is possible.

Further, the document ejecting means is not limited to a full-width belt, and other known means such as a divided belt, a roller, or a combination of a roller and a belt can be used. Further, the stacking tray does not necessarily have to be inclined toward the document feeding side, but may be in a parallel state, for example.

Furthermore, the present invention can be widely used in applications other than copying machines; for example, when applied to a facsimile machine, the reading position is not on the platen glass but on the recording/reading section. That is, the multi-position reading or reading operation is not limited to the platen glass or exposure operation, and may be changed as appropriate.

Next, another embodiment of the present invention will be described.

Figure 8 shows the automatic document circulation conveyance device (R-ADF) shown in Figure 1.
FIG. 3 is a cross-sectional view of a double-sided document automatic circulation conveyance device (]3R-AD) in which a double-sided document copying function is added to the double-sided document copying function.

The newly added members with numbers 101 onward are different from those shown in the previous embodiment, and the other forming members and their functions are energized as described above. Here, the paper path switching member 116 is connected to the shaft 113.
When a double-sided copy button (not shown) is turned on and a double-sided copy signal is received, it is switched from the position shown by the solid line to the position shown by the broken line by another power source (for example, an lenoid). . A sheet material 112 is fixed to the switching member 116 on the document path side, and is designed to press against the surface of the platen 9 or the belt 18 through its bending elasticity to reliably guide the document. The switching member 116 is switched to the state shown by the broken line before the roller 17 starts rotating, that is, immediately after copying of the first TfiJ is completed.

As a result, the seat path 10 is blocked and the evacuation path 1
14 opens. Note that the state of the switching member 116 indicated by the solid line is a state diagram in which the switching member 116 functions only as the above-mentioned ADF, DF, and R-ADF.

The document 0 on the platen 9, whose first side has already been copied, is conveyed to the left in the figure by the frictional force with the belt 18 as the roller 17 rotates in the direction of arrow C. Then, the original O passes under the member 116, pushes aside the flexible guide 110, and enters the space 114 on the extension of the platen glass 9. Here, in front of the seat bath 114, rollers 105, 104, 105,
There are switchback means S, B consisting of 106. Forward transfer multi-2104. The reverse rotation rows 2103 are each rotating in the direction of the arrow shown in the figure. The driven pressers 105 and 106 are supported by a swing plate 107 and are swingable about a shaft 108. Then, by using other power (for example, a solenoid), the forward transfer roller 104 and the roller 105 shown in the figure are swung in the direction of the arrow a to the side where the reverse rotation roller 2103 and the roller 10t5 are in pressure contact. It can be switched in any direction. Swing in the opposite direction and lower 2104, 10
The original 0 is evacuated from above the glass 9 along the bus 114 by the clamping and conveying force of 5.

Now, the leading edge of the document O passes through the normal transfer υ roller 104 and the roller 105 and reaches the sensor 117.
continues to rotate in the direction of arrow C. Furthermore, sensor 11
When tray 7 detects the leading edge of the document, the rotation of roller 117 changes in the direction of the arrow in response to the signal, and the tray 117 is ready to receive the next double-sided document, and the next document is fed from the bottom of the stacked documents on tray 1. It's coming. Then, the trailing edge of the document O enters the path 114, and when the trailing edge is detected by the sensor 118 on the upstream side of the switchback means S, B and the downstream side of the guide 110, the signal ) The rocking plate 107 swings to the right (in the direction of the arrow), and the reversing roller 106
and the rollers 106 come into pressure contact with each other, and at the same time, the conveyance force of the forward feed rollers 104 is released, the document O starts to move backward, and the guide 1
10, the document 0 is guided in the direction of the path 10, passes through the bus 10, and is discharged onto the tray 1, where the document 0 is stacked with its second side facing upward. Following this, the copying of the other originals stacked at the bottom is completed, and when this original 0 is fed next, the second side is exposed to light as described in connection with the above-mentioned embodiment. It becomes.

Therefore, according to this embodiment, both sides of a double-sided original can be automatically copied.

Note that the reversing path cover 115 is provided with a lip portion 115a as a guide suitable for a paper guide. Further, an opening 115b for a long original is provided, and the leading end of the long original hangs down from the opening 115b until the rear end of the long original is detected by the sensor 118. Further, the top surface of the cover 115 is nearly horizontal and can be used for other purposes such as a document placement table.

Further, the aforementioned switchback means 104, 103゜10
5. The 10+5 configuration works well as shown, but
For paper conveyance, the top and bottom are reversed, that is, forward and reverse rollers 104.10
It has been confirmed through experiments that it is better to place 5 on top and the swinging roller on the bottom.

Further, in this embodiment, the tray 1 can be rotated around the roller 2 and stored in the state shown by the broken line 1' in the figure. At this time, the row 22a rotating via the belt 3 also rotates 2 a
/ becomes a state. In this storage state, the B-R-ADF (automatic double-sided original circulation device), which handles multiple originals, and R+A
Although it does not function as DII□ (automatic document feeder) or AD day (automatic document feeder e), it can function only as a manual feeder for a single sheet of document, that is, as a DF.

Furthermore, the pressing roller 19 is connected to the central shaft 120 via the arm 119.
Normally, the belt 18 surface is pressed by a spring 122, but when the document is replaced, it is released from the belt 18 side by the action of the solenoid 121. This is BRAD
When exchanging originals in F', R-ADF mode, the original fed onto the platen 9 and the platen 9
Since the documents discharged from the top to the left may temporarily come into contact with each other and pass each other, this device is designed to avoid interfering with the conveyance performance. Furthermore, as described above, this embodiment provides a multifunctional double-sided document automatic circulation conveyance device that is small, lightweight, inexpensive, and highly reliable. Not only can it be applied to all copying devices, but it is even more effective when used in combination with a double-sided copying device. Moreover, if copying is performed using the R + ADF according to this embodiment,
Since it is possible to obtain copies with the pages of the original set in order each time, a large sorter etc. for collation is not necessary when used in conjunction with a copying machine with a swinging output tray of known technology.
From this point of view, it can be seen that it is particularly suitable for general-purpose and small-sized copying machines.

Since the present invention has the above-described configuration, it is possible to use originals of mixed sizes, and since the central functional parts are concentrated in one place, miniaturization is possible.

Also, based on the configuration of ADF, R-ADF, B-R
- It is a device that enables expansion and development into ADF and can easily meet extremely wide range of requirements.

[Brief explanation of the drawing]

Figures 1(A) and 1fB) are schematic diagrams of conventional equipment;
Figure (C) is a schematic diagram of an embodiment of the present invention, Figure 2 is a perspective view of a copying machine with an automatic document feeder device using an embodiment of the present invention, and Figure 6 is an embodiment of the present invention. 4(A) is a front view showing the document separating section, FIG. 4(B) is a front view of the partition plate, and FIG. 5 is a side view of the document separating section. 6 is a schematic diagram of the drive unit, FIG. 7 is a block diagram of an electric circuit for controlling the operation of the automatic document conveying device, and FIG. 8 is a cross-sectional view of another embodiment. In the figure, 1...Tray 2.2a...Feed roller 4.4a...Separation roller 5...Separation belt? S10... Seat bus 26... Partition plate Applicant: Canon Co., Ltd.

Claims (10)

[Claims] (1) In an automatic document feeder that transports stacked originals to a reading position, reads the reading surface, and then ejects them from the reading position, there is a stacking tray that supports the originals, and a stacking tray that supports the originals, and a A supply means that separates and sends the lower original document sheet by sheet; a first guide means that inverts the document sent out by the supply means and guides it to a reading position; and a first guide means that guides the document sent to the reading position by the first guide means. a document ejecting means for ejecting the original whose entire scanning surface has been read from the same side as when it enters the reading position; and a document ejecting means for reversing and guiding the original ejected from the reading position to the document receiving section. An automatic document conveying device comprising a second guide means. (2) In an automatic document feeder that transports the loaded originals to the reading position, reads the reading surface, and then ejects the originals from the reading position, there is a stacking tray that supports the originals, and a stacking tray that transports the stacked originals one by one on the stacking tray. a supply means for separating and sending out the document; a first guiding stage for guiding the document sent out by the supplying means to a reading whitening position; a document discharging means for discharging the document from the reading position; and a second guiding means for guiding the document discharged from the reading position by the document discharging means to the stacking tray with its second side facing upward. An automatic document feeder comprising: (3) The stacked originals are conveyed to the reading position, and after reading, the originals are taken out from the reading position.In the automatic document feeder, the originals are separated from the stacking tray and transported one by one from the stacking tray. means for conveying the document sent out from the stacking tray by the separation conveyance means to a predetermined position, and then ejecting the document from the predetermined position and returning it to the tray; a rotary body that is driven to rotate; and a downward direction from the rotary body. An arm that receives rotational force in the same direction. An automatic document conveying device characterized by having a partition plate provided on the arm and separating the document on the tray from the document returned from a predetermined position. (4) The automatic document conveying device according to any of claims (1), (2), and (3), wherein the stacking tray is inclined toward the document feeding side. (5) The automatic document conveying device according to claims (1) and (2), wherein the supply means includes an endless belt suspended on rollers. (6) The automatic document conveying apparatus according to claims (1) and (2), wherein the supply means includes an endless belt that rotates in opposite directions. (7) The automatic document conveying device according to claim (1), wherein the first guide means has an arch-shaped passage. (8) The automatic document conveying device according to claim (1), wherein the document ejecting means includes an endless belt that rotates in forward and reverse directions. (9) The automatic document conveying device according to claim (1), wherein the second guide means has an arch-shaped passage. (10) The automatic document feeder according to claim (1), wherein the reading position is on a platen glass.