JPH0549590B2 - - Google Patents

Description

Detailed Description of the Invention Technical Field The present invention relates to a document circulation system in which originals are separated and fed one by one from an original placing table to an exposure position, and after exposure is completed, the originals are ejected from the exposure position and returned to the original placing table. Regarding equipment.

BACKGROUND ART Conventionally, a stack of originals to be fed is placed on a document stacking table, and a friction separation means provided at the feeding end side of the stack of originals sequentially separates the originals one by one from the top or bottom sheet of the stack. Further, there is known a document circulating device configured such that a document is fed to a predetermined position on a platen glass and discharged after exposure is completed, and is returned to a document table and stacked on top of a stack of documents.

In such devices, there are various sizes of originals to be placed, such as B5 and A4, and it is necessary for the operator to move the original guide attached to the mounting table according to the size of the original being used. Ta. Normal document feeding was maintained only when the guide was placed in an appropriate position. However, in the market, operators often set documents without setting the guides at appropriate positions, which causes problems such as skew feeding and poor separation. Further, if a new means for detecting the above-mentioned problem is provided before the document feeding operation is provided, the structure becomes complicated.

Purpose The present invention has been made in view of the above points, and an object of the present invention is to provide a document circulation device that can prevent document separation and feeding defects without complicating the configuration.

Embodiments A detailed description will be given below based on the drawings. FIG. 1 is a longitudinal cross-sectional view showing a schematic configuration of an example of a double-sided original circulation device of the present invention.

1 is a document placement table, 2 is a paper feed belt drive shaft, 2a
is a paper feed belt driven shaft, between which the paper feed belt 3 is placed, rotating in the direction of arrow C in the figure. 4 is a separation belt drive shaft, 4a is a separation belt driven shaft, and a separation belt 5 is placed between them and rotates in the direction of arrow D in the figure. 2 more
b is a half-moon-shaped roller rotating in the direction of arrow E in the figure. A plurality of sheet-shaped originals placed on the original placing table 1 are separated one by one from the bottom by the paper feed belt 3, separation belt 5, and half-moon roller 2b. 6 is a conveyance roller, and 6a and 6b are rollers that are in pressure contact with the conveyance roller 6, respectively. Also, 9,
10 and 11 are also conveyor rollers, 9a, 10a, 11a
are rollers that are in pressure contact with the conveyance rollers 9, 10, and 11, respectively. Further, 7 is a conveyor belt driving roller located near the left side of the platen glass 12 disposed on the top plate of the main body of the copying machine, and 7a is a conveyor belt driven roller located near the right side of the platen glass 12. A belt 8 is attached to the belt.

The lower surface of this suspension belt 8 is a platen glass 12
facing or touching the upper surface of the Further, reference numerals 13 to 17 are reflective optical sensors that detect the leading edge or trailing edge of a document, which are disposed at required locations on the document circulation path (paper path). Further, 20 is a reflective optical sensor ES for detecting the original placed on the original platen 1, and 19 is a reflective sensor (recycle sensor) RS for detecting one circulation of the original bundle.
The partition arm 22 is stopped from rotating above the document bundle by the recycling motor 21, and at that point, the recycling sensor RS, 19 is turned on, and the documents are then separated and fed from the bottom document, and the rear end of the final document is placed on the partition arm 22. When the partition arm 22 passes through the recycle sensor RS, 19, the partition arm 22 is turned off by its own weight.

FIG. 2 is a schematic cross-sectional rear view showing the drive section. In the figure, 80 is a motor M2, and 81 is a motor gear that transmits driving force to the paper feed belt drive shaft 2, separation belt drive shaft 4, and half-moon roller 2b through a gear 96. 82 is a motor M1, 83 is a motor pulley, and 86 is a two-stage pulley, which transmits the drive from the belt 87 to the belt 88. Further, 89 is also a two-stage pulley, which is integrated and transmits the driving force from the belt 88 to the belt 90, thereby constantly transmitting the driving force to the drive roller 7 of the conveyor belt 8 through the pulley 91. Further, 93 is a disc having a notched groove 94 which is rotated integrally with the two-stage pulley 89, and the amount of movement of the belt 8 can be detected by a photoelectric sensor 95. Reference numeral 92 denotes an electromagnetic brake BK, which, when turned on, makes it possible to stop the belt 8 instantly.

Further, 97 is a motor M3, 98 is a gear, 99 is a pulley, and 100, 101, and 102 are belts, which transmit driving force to the conveyance rollers 6, 9, 10, and 11. Further, 103 is a disc having a notched groove 104 that rotates integrally with the pulley 99, and a photoelectric sensor 105 detects the amount of rotation of the transport rollers 6, 9, 10, and 11, that is, detects the amount of transport movement of the document. I can do it. Reference numeral 23 denotes a switching pawl, which uses a tension spring 24 and a solenoid to switch between transporting the document on the platen glass 12 in the direction of the transport roller 6 using the fulcrum 106, or transporting it from the transport roller 9 in the direction above the platen glass. This is done by SL, 107.

Next, the operation of the double-sided document circulating device will be explained.

(i) Single-sided original copying In FIG. 1, a plurality of sheets of single-sided originals with the same page order are placed on the original placing table 1 with the first page facing upward. The placed originals are separated and fed one by one from the bottom by the paper feed belt 3 and the separation belt 5, and the fed originals pass through the paper path a and are transferred to the platen glass 12 by the conveyor belt 8. It is sent out with the side facing down. When the trailing edge of the document is detected by sensors S2 and S14,
From that point on, counting of the number of notched grooves 94 in the disc 93 (Fig. 2) is started, and after counting a predetermined count, the motors M1 and 82 are turned off, and the electromagnetic brakes BK and
92 is turned on, and the rotational drive of the conveyor belt 8 is instantly stopped. This allows the original to be placed on the platen glass 1.
It is automatically positioned and set to a predetermined position on the second surface.

When the original is thus positioned on the platen glass 12, the copying operation is started, one exposure scan is performed, and the copied copy paper is stored in a paper ejection tray (not shown). After the exposure of the original is completed, the solenoid SL107 is turned on and the switching claw 23 is in the state shown by the broken line, and the exposed original is moved to the paper path a, a.
is discharged through the At the same time, the next original is fed in parallel and positioned on the platen glass 12 by the above-described operation.

This parallel operation is simply an operation of circulating the originals, and the reversal of the originals is not performed on the previous or next original during the process, so it is called a normal discharging and normal feeding operation. The recycle sensor RS, 19 detects one circulation of the originals that have been sequentially fed, discharged, and fed, and the end of the circulation is sent to the main body of the copying machine to count the number of copies.
The above operation is repeated until the set number of copies is reached, and the required number of copies is stored in the output tray (not shown) of the copying machine.

(ii) Double-sided original copying If there are three originals on the original platen 1, the pages of the originals placed on the original platen 1 will be in the page order as shown in Figure 3, and the document placement state after copying is complete. will be the same as the initial setting as shown in FIG. Explain their operation.

First, the 5th and 6th page originals are conveyed to the top of the platen glass 12, and then the motors M1 and 82 are reversely rotated.
M3, 97 (Fig. 2) rotates forward and at the same time, solenoid SL, 107 is turned on, so that the switching claw 23 is in the state shown by the broken line, and the original is placed in the paper path a,
a, conveyance rollers 6, 6a, 10, 10a, 1
1, 11a and transported. sensor S
When motors M3 and 15 detect the trailing edge of the document, motors M3 and 97 are stopped. Thereafter, after a certain period of time has elapsed, the motors M3 and 97 are reversed, and the original passes through paper paths a and a and is transported by transport rollers 9 and 9a. When the sensor S4, 16 detects the rear edge of the document, the motor M3, 97 is stopped.
After the time has elapsed, the motors M3, 97 are rotated in the normal direction again, the motors M1, 82 are also rotated in the normal direction, the solenoid SL, 107 is turned off, and the document passes through the paper path a.
It is held on the belt 8 and conveyed. When the trailing edge of the document is detected by the sensors S5, 17, the number of notched grooves 94 in the disk 93 (FIG. 2) starts counting from that point on, and after counting a predetermined number, the motors M1, 82 start. Then, the electromagnetic brake BK, 92 is turned on, the rotational drive of the conveyor belt 8 is stopped instantly, and the original is set. As described above, the paper feeding operation in which the original on the original platen 1 is set on the platen glass 12 while being inverted, that is, the reversing paper feeding operation (hereinafter referred to as the reverse feeding operation) is first performed.

Then, the copying machine main body starts copying the sixth page of the original, starts one exposure operation, and stores the copied copy paper in a paper discharge tray (not shown). After the exposure of the original, the 6th page of the exposed original is passed through the paper path a, a, a, a, a, in order to position and set the 5th page of the original downward on the platen glass 12. (This operation is hereinafter referred to as a repeat operation).

Thereafter, the copying machine main body starts copying the fifth page of the original, and stores the copy paper in a paper discharge tray (not shown).

After the exposure of the 5th page of the original is completed, the platen glass 1
The original on 2 passes through paper paths a and a and is ejected onto the original placed on the original platen 1 by conveyance rollers 11 and 11a with the fifth page facing upward (this operation is hereinafter referred to as normal ejection operation). ). From a certain time during this normal ejecting operation, the above-mentioned counter-feeding operation of the subsequent document holding pages 4 and 3 is performed in parallel with the normal ejecting operation, and the fourth page is placed face down on the platen glass 12. (The operation in which the normal ejecting operation and the counter-feeding operation are performed in parallel is hereinafter referred to as the normal ejecting/reverse-feeding operation). After that, the above-mentioned copying operation is repeated as many times as necessary, and finally the pages of the copy paper are arranged in the same order.
The document is stored in a paper discharge tray (not shown), and the document is also discharged onto the document table 1 without changing its initial set state as shown in FIG. 3, and copying from the double-sided document is completed.

FIG. 4 is a schematic control circuit diagram for performing the above-described sequence operation.

In FIG. 4, it is mainly composed of a well-known one-chip microcomputer (hereinafter referred to as microcomputer) 120 that has built-in ROM, RAM, etc.
Each sensor signal is input to the input ports _I1 to _I7 of the microcomputer 120, and the conveyance clock output from the sensor 105 and the belt clock signal output from the sensors BC and 95 are input to the interrupt terminals iNT1 and iNT2. .

On the other hand, drivers _D1 to _D8 are connected to output ports _O1 to _O8 of the microcomputer 120, and each load can be driven via the drivers _D1 to _D8 . From output ports O ₄ and O ₅ , transfer motor M3,
M3FWD and M3REV are output so that 97 can be rotated forward and reverse, and are indicated by arrows → and 〓 in Fig. 1, respectively.
It is configured so that it can be rotated in the direction of →. In addition, the output ports O ₂ and O ₃ have a belt drive motor M1,
M1FWD and M1REV are output so that the 82 can be reversed forward and reverse, and the arrows → and 〓 are respectively shown in Figure 1.
It is configured to rotate in the direction of →.

In particular, the configuration is such that the recycle motor RM is driven from the output port _O1 via the driver _D1 .

In addition, the I/O terminal of the microcomputer 120 is connected to the copying machine main body, and sends and receives the above-mentioned copying operation start signal, original exposure end signal, original circulation end signal, etc., and operates the double-sided original circulating device and the copying machine main body. Execute matching. Reading these input signals or turning on/off the load is done in the microcontroller 120.
Controlled according to a program stored in ROM.

Next, the operation of the double-sided document circulation device (hereinafter referred to as RDF) of the present invention will be explained using the general flowcharts shown in FIGS. 5 and 6 and the detail flowcharts shown in FIGS. 7 to 9.

FIG. 5 is a general flowchart of a single-sided original copying operation, and FIG. 6 is a general flowchart of a double-sided original copying operation. In FIG. 5, the single-sided document copying operation first executes the partition arm check SUB (stepφ), which will be described later, and then the partition arm 2
2 is rotated at the top of the document stack, and then the normal feed SUB
(step 100) is executed to separate and feed one document from the document stack placed on the document placement table 1, and
Through a (Figure 1) platen glass 1 of the copying machine
2 is stopped at a predetermined position, and then a copying operation start signal is sent to the copying machine main body, and the copying machine starts copying and starts exposure. on the other hand
In order to detect one circulation of the document bundle, RDF executes cycle end SUB (step 500) and waits until the exposure of the copying machine body is completed (step 200). At the end of the exposure, the forward discharge SUB (step 300) described later is executed, and the original on the platen glass 12 is transferred to the transport path a~a~.
a, and is again placed on top of the partition arm 22 on the stack of originals placed on the original placing table 1. After that, repeat this operation and cycle end SUB
(Step 500) When the partition arm 22 falls from the original due to its own weight, it notifies the copying machine that one cycle of the original has been completed, and the operation ends, and as a result, a copy set is completed on the output tray of the copying machine. do.

On the other hand, in Fig. 6, the duplex original copying operation begins with the partition arm check SUB (stepφ) and the normal feed SUB.
(step 100) and repeat SUB (step 400) to move the original from the original table 1 to the transport path a~a~a.
~a~a~a~a~a and is stopped at a predetermined position on the platen glass 12. At this time, the original is placed so that the back side of the side placed on the original placing table 1 is on the platen glass 12 side, and in step 200, the copying machine main body is instructed to perform a back side copying operation of the original. Next, when the exposure of the copying operation is completed, SUB (step 400) is executed again and the original is transferred to the transport path a.
~a~a~a~a~a~a,
The document is stopped at a predetermined position on the platen glass 12 again, and this time it is placed so that the front surface of the document is on the platen glass 12 side.In step 200, the copying machine main body is commanded to perform the front side copying operation of the document, and the document stack is Execute cycle end SUB to detect one cycle (step 500) At the end of exposure of this copying operation, execute forward discharge SUB (step 300) to circulate the original on both sides to the upper side of the partition arm 22 of the original placing table 1 It will be returned to the same set state as before. Thereafter, this operation is repeated, and one copy set is completed at the end of the above-mentioned cycle.

Next, we will provide a detailed explanation of the operations performed by each SUB. In FIG. 7, the normal feeding SUB is executed by first turning on the separation motors M2 and 80 in order to separate one document from the lower side from the document stack placed on the document placement table 1, and then turning on the conveyance rollers 6 and 6a. Wait until the leading edge of the document reaches the paper feed sensor S1, 13 located upstream (step 101).The transport motor M3, 97FWD is activated to send the separated document to the transport path a by the transport rollers 6, 6a. is turned on to rotate the conveyance rollers 6, 6a in the direction of the solid arrow, and wait until the leading edge of the document reaches the paper feed sensors S2, 14 located between the conveyance rollers 6, 6a and the belt roller 7 (step 102). ). Assuming that the document is normally fed into the conveyance path upon arrival at the leading edge, the separation motors M2 and 80 are turned off so as not to separate the second document in succession, and the belt drive motor M is turned off in order to send the second document to the conveyance path a.
1 Turn on FWD and 82 and rotate the belt roller 7 in the direction of the arrow → until the leading edge of the original is fed into the belt 8 until the trailing edge of the original is detected by the paper feed sensors S2 and 14 mentioned above. Wait (step103). Feeding sensor S2, 14 feeds the rear edge of the document.
When detected, the registration counter [RGCN1], which is operated by the clock of the photoelectric sensor BC, 95, is started in order to stop the original at a predetermined position on the platen glass 12, and the photoelectric sensor
Each time BC, 95 is input one clock at a time, [RGCN1] is counted, and the process waits until [RGCN1] is completed (step 104). At the end of [RGCN1], the document has arrived near the predetermined position on the platen glass 12, and the electromagnetic brake BK, 92 is turned on, and at the same time, the belt drive motor M1FWD, 82 is turned off, and the belt drive is instantly stopped and accurate You can position the original. Also, conveyance motor M3,97
The drive of M3 and 97FWD is also stopped when the FWD is turned off, and the switching solenoid SL107 is turned on to switch to the conveyance path to the sheet discharge path a.

This operation ensures that one document is stopped at a predetermined position on the platen glass 12.

On the other hand, in FIG. 8, the execution of the flip-back SUB begins with switching the switching solenoid SL, in order to send the original on the platen glass 12 to the conveying paths a to a.
107, lowers the switching claw 23 to switch the conveyance path, then turns on the belt drive motor M1REV, 82 to rotate the belt roller 7 in the direction of the dotted arrow, and further rotates the conveyance rollers 6, 6a in the direction of the arrow. Then, turn on the conveyance motor M3, 97, that is, turn on M3FWD. The document enters the conveyance path a and continues to be conveyed until the paper discharge sensors S3 and 15 detect the trailing edge of the document (step 401). M1REV, 82 off, M3FWD, 97 off to turn off the belt drive motors M1, 82 and transport motors M3, 97 by counting the paper discharge timer from the time when the trailing edge of the document is detected until the trailing edge of the document comes out of the conveyance path a. The original is transported by transport rollers 10, 10a and 11, 1.
1a, and its rear end is supported by transport rollers 10, 10.
It is in a state near point a and is stopped while the standby interval timer is counting time (step 402).
Next, reverse the conveyance direction of the document and pass along the conveyance path a~a.
Conveying rollers 9, 9a and 10,1
In order to rotate 0a, 11, 11a in the direction of the dotted line arrow, turn on the conveyance motor M3, 97, that is, turn on M3.
REV, 97 is turned on, and with the document entered from conveyance path a, the document continues to be conveyed until the reversal sensor S4, 16 detects the trailing edge of the document (step 403). A reversal timer measures the time from the time when the trailing edge of the document is detected until the trailing edge of the document comes out of the transportation path a, and the transportation motor M3,
M3REV, 97 is turned off to turn off 97, and the document is supported by the transport rollers 10, 10a, 11, 11a, and the rear end is located between the reversal sensor S5, 17 and the transport rollers 10, 10a. The timer is stopped while counting time (step 404).

Next, reverse the conveyance direction of the document again and transfer it to the conveyance path a.
Conveying rollers 9, 9 to send the material to ~a~a
In order to rotate a in the direction of the arrow →, the transport motor M3,
97 is turned on, that is, M3FWD is turned on, and furthermore, the belt drive motor M1FWD, 82 is turned on to rotate the belt roller in the direction of the arrow →, and the switching solenoid SL107 is turned off, and the switching pawl 23 is lifted to switch the conveyance path. The leading edge of the document is on belt 8
The paper waits until the rear end is detected by the reversal sensors S5, 17 located in the transport path a (step 405).

When the trailing edge is detected, the original is placed on the platen glass 12.
In order to stop at a predetermined position above, the resist counter [RGCN2] is started, and the clock pulse of the photoelectric sensor 95 measures the time until [RGCN2] is completed (step 406). At the end of [RGCN2], the document has arrived near the predetermined position on the platen glass 12, and the electromagnetic brake BK, 92 is turned on, and at the same time, the belt drive motor M1FWD, 82 mentioned above is turned off, and the drive of the belt 8 is stopped instantly, resulting in accurate It is possible to position the original. Also, the transport motor M3,
The drive of 97 is also stopped when M3REV and 97 are turned off, and the switching solenoid SL and 107 are also turned off.
This operation reliably turns the document upside down and stops it at a predetermined position on the platen glass 12.

In FIG. 9, the normal discharge SUB is executed by the belt drive motor M1REV, 82 in order to rotate the belt roller 7 in the direction of the arrow → in order to send the document on the platen glass 12 to the conveyance path a to a.
, and then turn on the conveyor rollers 6, 6b, 10, 1.
In order to rotate 0a, 11, 11a in the direction of arrow →, turn on conveyance motor M3, 97, that is, M3
Turn on FWD and turn on solenoid SL, 107. With the document entering the conveyance path a, the process waits until the paper discharge sensors S3, 15 detect the trailing edge of the document (step 301). Paper ejection counter with trailing edge detection [EJCN]
is started, and the clock output of the photoelectric sensor 105 is counted until the end of [EJCN] (step 302).
At the end of [EJCN], the original is transferred to the transport rollers 11, 11
a, and is returned to the upper side of the stack of originals on the original platen 1, and the M3, 97FWD off M1
REV, 82 off switching solenoid SL107 is turned off to stop driving and paper ejection is completed (step 303).

10-1 to 10-4 are front views showing the recycling counting device. 11 and 12 are detailed flowcharts of the partition arm check SUB and cycle end SUB for operating the recycle counting device. The recycle count will be explained using these.

In Fig. 10-1, 21 is the original platen 1
This is a recycling motor with a shaft 25 fixed to the side wall 1a of the
It's a motor. Boss 2 fixed to motor shaft 25
A lever pin 27 is fixed to 6. The partition arm 22 is slidably fitted onto the motor shaft 25 and is adapted to be engaged by a lever pin 27. A notch 28 is provided in part of the original table 1 and its side wall 1a to allow the partition arm 22 to rotate. Further, in conjunction with the partition arm 22, a partially cut out disc 29 is provided, and the recycle sensor RS19 is turned on/off by the cut out portion.

As shown in Figure 10-2, when there is no original on the original platen 1, the partition arm is at position 2 indicated by the two-dot chain line in the figure.
2', and the recycle sensor 19 is turned on.
As mentioned above, when RDF starts operating, it first executes the partition arm check SUB. 1st
In Fig. 1, the partition arm check SUB first checks whether the recycle sensor 19 is on to see if the partition arm is at the aforementioned position 22', drives the recycle motor 21, and starts rotating in the direction of the arrow in Fig. 10-1. Shaft 2 of recycling motor 21
The lever pin 27 fixed on the document 5 also begins to rotate in the direction of the arrow and engages with the partition arm 22, so that the partition arm 22 also rotates in the direction of the arrow and is placed on the top of the document.

The drive time [motor on timer] of the recycle motor 21 starts at the same time as the drive of the recycle motor 21, and after a certain period of time, the timer ends and the drive of the recycle motor 21 is turned off (step 001). Here, the [motor on timer] is set so that the partition arm 22 is driven for a certain period of time longer than the rotation (one rotation) time required for the partition arm 22 to be placed on the document. Even if the partition arm 22 collides with the document and bounces, the partition arm 22 is driven for the time necessary to press against the top of the document and keep it stationary, so the partition arm 22 is always in close contact with the document.

At this time, as shown in Figure 10-1, the partition arm 2
2 is stopped from rotating on a stack of documents having a thickness l, the notch part of the notch disk 29 is at the position of the recycle sensor RS19, and the recycle sensor RS19
is detected to be off, and it is determined that the partition arm 22 has been set normally.
Clear and proceed to the next step (step002). However, as shown in FIG. 10-3, when the operator places a stack of originals of a predetermined number or more on the document mounting table 1, the thickness L of the stack of originals becomes L>l, and the partition arm 22 also stops at a high position. . Accordingly, the notch part of the notch disk 29 is not located at the position of the recycle sensor RS19, and the recycle sensor RS19 is detected to remain in the on state.At this time, it is determined that the number of originals is greater than the specified number, and the process proceeds to JAMSUB, which will be described later. Stop RDF operation (step003).

This step 003 can also detect when the partition arm 22 does not rotate due to a defect in the recycling motor or when it does not turn on/off due to a defect in the recycling sensor, and can immediately stop the operation of the RDF.

Further, as shown in FIG. 10-4, when the operator places a stack of documents on the document table 1, if the document is not placed in a position in contact with the side wall 1a, the document is set in an incorrect position. At this time, in step 001 described above, the [motor on timer] is driven for a certain period of time longer than the rotation time required for the partition arm 22 to be placed on the document, so the state shown in Fig. 10-4 occurs. In this case, the phenomenon of so-called idle rotation occurs, and the recycle sensor RS
19 can detect on/off two or more times during motor rotation, and in that case, the RDF operation is stopped as the document is set in a defective position (step 004).

Next, after the document has stopped at a predetermined position on the platen glass 12, a cycle end SUB is executed. This is executed before the originals are stopped one by one on the platen glass, and in FIG. If it is determined that the number is more than the number of JAM SUB
Proceed to step 501 to stop RDF operation. As described later, for example, even if the partition arm 22 is in a state where it should be hanging down due to its own weight, and there is a defect in which it does not hang down for some reason, the RDF will remain permanently.
can be prevented from continuing to operate up to a specified number. As the copying operation progresses, the originals after copying are sequentially stacked on top of the originals, that is, on the upper side of the partition arm 22. When the original at the top is fed onto the platen glass 12, one cycle of the original is completed.
Since there is no document under the partition arm 22, the partition arm 22 passes through the notch 28, rotates in the direction of the arrow in Figure 10-2 due to its own weight, and comes to rest at position 22' in the figure, at which time it is recycled. sensor
When the RS, 19 detects the partition arm 22, it outputs a cycle end signal to the copying machine (step 502). This ensures the operation of the recycle counting device. In order to stop the above-mentioned RDF operation, JAM SUB will be explained in FIG. 13.

First, the recycle motor RM, belt drive motor M1, separation motor M2, conveyance motor M3, brake BK, and switching solenoid SL are all turned off to stop their operation (step 601). Next, the operator checks whether the sensors S1, S2, S3, S4, and S5 on the paper path are all off, and then checks whether the operator has removed all the documents on the paper path. Check to see if you have removed the document stack from the document tray.
It is possible to release from the JAM state (step 602).

Effects As described above, according to the present invention, the partition means that detects one circulation of the original is used to detect a failure in the original set and control the transport of the original. It is possible to prevent transportation defects and the like.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a document circulation device according to the present invention, FIG. 2 is a cross-sectional rear view showing the drive unit of the document circulation device, FIG. 3 is a view showing a state in which a document is placed, and FIG. Block diagram showing the control section of the circulation device, No. 5
Figure 6 is a general flowchart showing the flow of control of the document circulation device, Figures 7 to 9, and Figure 1.
Figures 1 to 13 are detail flowcharts showing details of Figures 5 and 6, and Figures 10-1 to 10.
Figure-4 is a diagram showing the recycling counting device. In the figure, 1 is a document placement table, 3 is a paper feed belt, 5 is a separation belt, 8 is a suspension belt, 13 to 17, 20
19 is a sensor, 19 is a recycling sensor, 21 is a recycling motor, 22 is a partition arm, and 120 is a microcomputer.

Claims (1)

[Scope of Claims] 1. An original placing means for placing a bundle of originals, which separates and feeds the originals one by one from the original placing means to an exposure position, and after exposure, ejects the originals from the exposure position and returns the originals to the exposure position. a means for transporting the original to return it to the original stack; a partition means for detecting that the original set on the stack of originals placed on the original stack has gone through one cycle; and a partition means for setting the partitioning means on the stack of originals. a driving means that is driven for a certain period of time, a detection means that detects the partitioning means, and a control that controls the document transporting means by causing the detection means to detect the partitioning means a plurality of times while the partitioning means is being driven by the driving means. A document circulation device comprising: means. 2. The original circulation device according to claim 1, wherein the control means inhibits the operation of the original conveyance means when the detection means detects the partitioning means a plurality of times.