JPH0488362A - Circulation type automatic document feeder - Google Patents

Abstract

PURPOSE:To correctly separate a preprocessed sheet document from a processed sheet document and to achieve improvement in processed-sheet-document reloading by pressing a partition member against the preprocessed sheet document from above so that the document is firmly pressed. CONSTITUTION:When a sheet document P is placed on a document tray 1, the partition member 7 rotates and moves on the surface of the sheet document P by the driving of a motor 39. The motor 39 drives so that the sheet document P is firmly pressed; the partition member 7 is pressed against the sheet document P. Consequently, the sheet document P is firmly pressed and the partition member 7 is adhered to the sheet document P. When a first sheet document is ejected onto the sheet document in an uppermost part, the first document sheet is prevented from being interposed between the partition member 7 and the subsequent sheet document P, therefore copies can be outputted in correct page-order.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic document feeder for an image forming apparatus.

[Conventional technology]

Conventionally, as a sheet material conveying device, sheets are stacked one by one from the bottom of a sheet material loading table on which sheet originals to be image processed are loaded.
There is a system in which the sheet originals are conveyed and placed one by one at a predetermined position in an image processing section, and the sheet originals after image processing are reloaded from the predetermined position onto the top of the sheet originals on a sheet material stacking table. It is a so-called circulation type automatic document feeder, and was developed in Japanese Patent Application Laid-Open No. 1986-197.
This is shown in Publication No. 059 and the like. In this type of apparatus, a method for sorting sheet originals before image processing and sheet originals after image processing on the sheet material loading table is to insert a sorting member between the unprocessed and processed sheet originals. , FIG. 10 shows an example thereof.

In the figure, a sheet material P is provided on one side of the document tray 1.
A document reference guide 33 is integrally formed, and the other side of the sheet document P is touched by a width direction regulating plate 33a (not shown) that moves toward and away from the width direction. The position of the sheet document P is set in cooperation with the document reference guide 33. In the hollow part of the document reference guide 33, an output shaft 117 of a partition member motor (not shown) is provided.
is arranged, and the base of a partition member 136 is fixed to this output shaft 117. When the partition member motor rotates, the partition member 136 rotates in the direction of the arrow through a slit formed in the document reference guide 33 via the link 120, comes into contact with the top of the sheet document P, and stops. The other image-processed sheet originals P, which are to be reloaded, are separated from the sheet originals P that have not yet been image-processed below them. The conventional partition member 136 is a sheet document P before processing.
The partition member was in contact with it only by its own weight.

[Problem that the invention is trying to solve]

Therefore, as shown in Figure 10(b), when the sheet original P is curled or bent, the partition member cannot hold down the sheet original with its own weight alone, so the processed sheet cannot be held down. When originals are reloaded, the document may crawl under the partition member, making it impossible to separate the processed sheets before processing, or contact the partition member 136 when reloading processed sheet originals. This could damage the original or cause reloading failure, resulting in a jam.

[Means for Solving the Problems (and Effects)] According to the present invention, since the partition member holds down the sheet original before processing, it improves the adhesion between the sheet original and the partition member, and also reduces the thickness of the original. Before processing, it can be configured to reduce
This makes it possible to accurately partition processed manuscripts, and also enables highly reliable scales for reloading.

〔Example〕

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

In FIG. 1, an RDF (circulating document feeder of the present invention) B, which is a sheet material conveyance device, has a document tray l above it, and a drive roller 31 and other turn rollers 32 wound around it below. A wide belt 2 is arranged. This wide belt 2 is in contact with the platen 3 of the copying machine main body A, and conveys the sheet original P placed on the original tray 1 and places it on a predetermined position on the platen 3. The sheet original P on 3 is carried out onto the original tray l.

Further, a pair of width direction regulating plates 33a are arranged in the document tray l so as to be slidable in the width direction of the sheet document P, and regulate the width direction of the sheet document P placed on the document tray l. , stability when feeding the sheet original P and consistency when carrying it out onto the original tray 1 are ensured. The width direction regulating plate 33a has built-in jogging mechanisms 122 to 133, which push sheet documents P carried onto the document tray L one by one against the document reference guide 33 to further improve consistency. There is. 132 is a solenoid, 133
122 is a spring, and 122 is a jogging board. Furthermore, document tray lifting mechanisms 96 and 97, which will be described later. 99, it is possible to swing between the solid line position and the chain line position in the figure about the swing center 35.

Adjacent to the document tray 1, a stopper 3 is moved up and down by a half-moon-shaped paper feed roller 5 and a stopper solenoid 92.
7 is disposed, and the sheet original P when set on the original tray l is regulated by the protruding stopper 37 and cannot advance downstream.

When the copying conditions are input on the operation panel of the copying machine and the start key is pressed, the stopper 37 sinks to open the path for the sheet original P, and the sheet original P is fed by the paper feed roller 5. and advance downstream. At this time, the partition member 7 connected to the partition member motor built in the document standard guide 33 on the document tray 1 rotates and rides on the uppermost sheet document P, separating the unprocessed document and the processed document. make a distinction.

A conveyance roller 41 and a separation belt 42, which constitute a separation section, are disposed downstream of the stopper 37, and each rotates in the direction of the arrow to separate the sheet documents P advanced from the document tray L one by one. and transported further downstream.

Further, a weight 43 is provided above the stopper 37, and the sheet document P on the document tray 1 is too small to advance into the separating section 41, 42 with only the feeding force of the paper feed roller 5. If this is not possible, the solenoid 93 moves the sheet document P downward to sandwich the sheet document P between it and the paper feed roller 5 to improve the feeding force of the paper feed roller 5. A document regulating plate 46 is provided near the separating belt 42, and the sheet document P is placed in the separating section 41. 4
It is designed to prevent multiple pieces from entering at once every 2.

A document feeding path (■) is formed from the separation section 41, 42 to the platen 3. This document feeding path (■) is bent and connected to the conveying path on the platen 3, and the sheet document P is transferred onto the platen 3. Induce. Further, in the vicinity of the paper feed roller 5, an entry sensor 47a, which is a transmission type optical sensor for detecting the presence or absence of a sheet document P placed on the document tray 1;
47b is arranged.

A large roller 49 is disposed on the left side of the main body of the RDF B, and a first document discharge path (1) extends from the platen 3, around the outer circumference of the large roller 49, and above the document tray 1.
is configured. Further, a document reversing path (2) is configured, which branches from above the dog roller 49 of the first document ejection path (2) and for reversing the front and back sides of the double-sided document, and the downstream portion of this document reversing path (2) is configured as described above. It merges with the document feeding path I.

A first paper ejection roller 5 is provided on the downstream side of the first document ejection path ■.
0 is provided, and the sheet document P conveyed through the first document discharge path 2 is conveyed to the top of the document bundle P on the document tray l.

The wide belt 2 disposed above the platen 3 transports and places the sheet document P at a predetermined position on the platen 3.
After reading the image, it is carried out from the platen 3.

A feeding roller 51 is disposed at the confluence of the document feeding path (■) and the document reversing path (■), and this feeding roller 51 forms a loop around the sheet document P that has reached it. Prevents skewing. Near the upstream side of the feed roller 51, there is a paper feed sensor 52a which is a transmission type optical sensor that detects the front and rear edges of the sheet document P.

52b is provided, and the sheet document P that has passed through either of the document feeding path I and the document reversing path (2) can be detected.

Reversal sensors 53a and 53b, which are transmissive optical sensors, are arranged below the dog roller 49 in the first document discharge path 49 to detect the sheet document P carried out from the platen 3, and a large roller 49 and the first paper feed roller 50, a sheet document P that passes through the first document discharge path ■ and is carried out onto the document tray 1 passes through the first document discharge path ■. A first paper ejection sensor 5 which is a transmission type optical sensor that detects
5a and 55b are provided.

A reversing flapper 56 for switching paths is disposed at a portion where the first document ejection path (■) branches into the original reversing path (2).
By swinging between the solid line position and the chain line position in the figure, the path is switched.

Further, on the right side of the main body of RDF B, a second document discharge path ■ is configured to carry out the sheet document P after the image reading on the platen 3 is carried out in the opposite direction to the direction in which it is carried into the platen 3. There is.

In the second document discharge path (■), a first conveyance roller 59 for conveying the sheet document P in the second document discharge path (■), a second
Conveyance rollers 60 are respectively disposed, and a second paper feed roller 61 is disposed downstream of the second document discharge path (■), and a second document feed roller 61 is disposed downstream of the second document discharge path (■). The sheet original P is carried out to the top of the original bundle P on the original tray l.

A document discharge tray 62 is disposed above the second document discharge path (■), and the second document discharge path (■) branches from near the downstream of the first conveyance roller 59, and the document discharge tray 62 is arranged above the second document discharge path (■). A third document discharge path (3) extending to the tray 62 is configured. A paper ejection flapper 63 for switching the conveyance path is disposed at the branching portion of the second document ejection path (■) and the third document ejection path (■), and the paper ejection flapper solenoid 99 is turned on and off. When turned off, the path is switched by swinging between the solid line position and the chain line position in the figure.

A third paper ejection roller 6 is provided on the downstream side of the third document ejection path V.
6 is provided, and the sheet document P conveyed through the third document discharge path (3) is conveyed onto the document discharge tray 62 . Inside the second document ejection path, there is a sheet document P in the second document ejection path.
A second paper ejection sensor 67a is a transmission type optical sensor for detecting the front end and rear end of the sheet.

67b between the platen 3 and the first conveyance roller 59, and
A third paper ejection sensor 69a is located between the second conveyance roller 60 and the branching portion of the second and third document ejection paths (■) and (2).

69b is provided.

On the right side of this RDF B body, the RDFB is connected from the outside of the body.
A document carry-in lower 0 for receiving a sheet document P in the main body is open, and a document carry-in path that merges from the document carry-in lower 0 into the second document discharge path ■ near the upstream side of the first conveyance roller 59 ■ is configured.

An auxiliary tray 72 is disposed inside the document ejection tray 62 and is pivotable around a rotational center axis 71 at the leading end. It is designed to swing between the position and the chain line position.

In other words, when document tray L is at the solid line position in the figure, the auxiliary tray 72 is raised to the solid line position in the figure in order to improve the loading of large-sized sheet documents P, and the document tray 1 is at the chain line position in the figure. When the document output tray 62
2 is stored at the position indicated by the chain line in the figure.

Next, the partition member of the document tray 1 will be explained using FIG. 4. FIG. 4 is a diagram showing details of the structure of the partition member.

In FIG. 4, the output shaft 117 of the partition member motor 39
A partition flag 119 is fixed on the top.

Part of the circumference of the partition flag 119 is cut 119a as shown, and the partition member 7 is fixed on the circumference, and the output shaft 1 is integrally connected to the partition flag 119.
17 and rotate. The cross-sectional shape of the partition member 7 is shown in Figure 4 (C
) and (d), it has an upwardly convex semicircular diameter. Reference numeral 121 indicates a partition sensor, which determines the position of the partition member 7 by detecting the partition flag 119.

In FIG. 4(a), a sheet original P is placed on the original tray 1.
When the sheet document P is placed, the partition member 7 is rotated to the upper surface of the sheet document P by the drive of the motor 39. As shown in FIG. 4(b), the motor 39 is driven to further press down the sheet original P from the state shown in FIG. 4(a), and the partition member 7 presses the sheet original P.

Due to this action, the sheet original P is pressed down as shown in FIG. 4(b), and the partition member 7 and the sheet original P are brought into close contact.

As a result, as shown in FIGS. 4(C) and (d), when the th sheet original is discharged onto the uppermost sheet original, the first sheet original is placed between the partition member 7 and the sheet original P. There is no need to dig in, and it becomes possible to output copy paper with all the pages. If the ejected original gets into the partition member and the uppermost original, the final end of one original job will be messed up, and it will not be possible to output a copy sheet with all the pages.

Also, regarding the timing at which the partition member 7 presses the sheet original P, the flow is basically shown in FIG. It is sufficient to press the original P.

Referring to FIG. 6, after the original is placed on the tray, the copy mode is input and copying begins. First, the motor 39 rotates and the flag 119 detects the presence or absence of a document. The partition member 7 is placed on the sheet document P at the time when the presence of the document is detected. At this point, stop starting the motor 39,
The document is held down by its own weight (. Processing starts from the bottom document, and when the processing in the image reading section is completed, the bottom document is conveyed to be discharged onto the tray.

In the present invention, the following timing is described as an example.

When the sensors 69a and 69b detect the leading edge of the lowermost original, the motor 39 is started again and the partition member 7 applies pressure to the original sheet P to be processed. At this time, if the motor is driven at full power, it will cause problems such as an increase in the temperature of the motor, so the motor is controlled to rotate at a low speed and is advantageous for increasing the temperature.

Next, after the sensors 69a and 69b detect the trailing edge of the bottom original, the time required for the leading edge of the bottom original to cross over the partition member 7 is theoretically calculated, and the time is calculated. Let T be a timer value.

Therefore, the activation of the motor 39 is stopped T seconds after the rear end is detected. This timing is shown in this embodiment, in which the lowest sheet of original is ejected to the tray by this sequence, but basically, it is sufficient to hold down the original while the original is being ejected over the partition member. Any time is a good time to start pressing (for example, Figure 7). Next, the cross-sectional shape of the partition member 7 will be explained.

In this example, the cross-sectional shape is an upwardly convex semicircular shape as shown in FIGS. 4(c) and 4(d). This is shown in Figure 4 (C) during switch back ejection (in the direction of the arrow) and Figure 4 ((1)
During closed-loop ejection (in the direction of the arrow), no matter which direction the original is ejected from, the uppermost original surface and the partition member 7
This eliminates gaps and the tendency for documents to get in so that documents ejected during the gap will not sneak in.

Furthermore, even if the ejected document, such as a folded paper under the leading edge, collides with the partition member 7, it can be reloaded while sliding on the partition member.

In addition, FIG. 4(C) shows a switch-back method, in which the original that enters from the left side of the platen 3 is read and then passed through the path 2 from the left side of the platen 3 by clockwise rotation of the belt 2 and transferred to the tray 1. Return to top.

In addition, FIG. 4(d) shows a closed loop type, and the platen 3
After reading the document that has entered from the left side of the platen 3, the belt 2 rotates to the left and returns to the tray 1 from the right side of the platen 3 through a path (3).

Next, the drive system of the RDF B of the present invention will be explained using FIG. 2.

FIG. 2 shows a drive system diagram showing motors and solenoids for driving each conveyance roller and flapper.

In FIG. 2, reference numeral 81 indicates a separation motor,
This separation motor 81 drives the conveyance roller 41 and the separation belt 42, which are separation sections, in the direction of the arrow in the figure.

The belt motor 82 drives the feed roller 51 and the drive roller 31 that drives the wide belt 2 via a feed roller clutch 83. Furthermore, the rotation of the drive roller 31 is transferred to the turn roller 32 by the wide belt 2. At the same time, the first conveyance roller 59 is also driven.

Further, a brake 8 is provided on the motor shaft of the belt motor 82.
5 is provided to ensure the position of the wide belt 2 when it stops.

The separation motor 81 drives the feeding roller 51 via a separation clutch 86. The reversing motor 87 drives the large roller 49 and the first paper discharge roller 50. Reference numeral 89 indicates a paper ejection motor, and this paper ejection motor 89 is connected to the second conveyance roller 60 and the third paper ejection roller 66.
The two drive the two.

On the shaft of each motor are clock discs 81a, 82a, 87a, 8 with a plurality of slits formed therein.
Clock sensors 81b, 82b, 87b, 89b, etc., which generate pulses by recognizing each slit with a transmission type optical sensor, are provided. By clock-counting the rotation of each motor using clock sensors 81b, 82b, 87b, and 89b, the amount of rotation of each transport roller can be measured, and the amount of movement of the sheet document P can be detected.

Reference numeral 90 indicates a reversing flapper solenoid 57 for swinging the reversing flapper 56. When the reversing flapper 56 is OFF, the reversing flapper 56 is at the solid line position in the figure, and the sheet document P that has passed through the first document discharge path is carried out onto the document tray 1, and when turned on, the sheet document P passing through the first document discharge path (2) is guided to the document reversing path (2).

Reference numeral 99 indicates a paper ejection flapper solenoid for swinging the paper ejection flapper 63, and when it is OFF, it is at the solid line position in the figure, and the sheet original P that has passed through the second original paper ejection path is transferred to the original tray. 1, and when ON, the sheet document P that passes through the second document discharge path ■ is transferred to the third document discharge path ■
The document is guided to the document output tray 62 and transported to the document discharge tray 62.

The stopper solenoid 92 drives the stopper 37 to move up and down, and is in the position shown in the figure when it is OFF to prevent the document bundle P on the document tray 1 from advancing toward the downstream side, and when it is ON.
At times, the stopper 37 sinks to open the path for the sheet document P.

Reference numeral 93 indicates a weight solenoid, which swings the weight 43 up and down. When it is OFF, it is in the position shown in the figure, and when it is ON, the weight 43 is lowered and the sheet original is placed on the paper feed roller 5. By pressing P, the conveyance force by the paper feed roller 5 is increased.

In FIG. 8, another sheet material conveying device F is provided and connected to the outside of the sheet material conveying device B, and a sheet document P conveyed from the sheet material conveying device F is passed through the document carrying path ■. The document can be carried into the second document discharge path (3) and transported to the document tray 1.

Therefore, after the image-processed sheet original P is transferred to the second original output tray 62, the sheet original P from the external sheet material conveying device F is transferred onto the first original tray l, and the image processing operation is performed. By repeating the restart operation, image processing of a large-volume sheet document P becomes possible.

Furthermore, if the next user sets the sheet document P to be image-processed in advance on the external sheet material conveyance device F as shown in FIG. 5 while the previous user is processing the image, the next user can There is no need to wait on the spot until the user's processing is completed, and the image processing device can also operate continuously, so that efficient work can be done and the sheet material conveying device can be operated effectively. I can do it.

Next, the jogging mechanism will be explained using FIG. 3. FIG. 3 is a top view of the document tray 1.

Reference numeral 122 in the figure is a jogging guide forming a part of the widthwise regulating plate 33a, and is supported by the widthwise regulating plate 33a so as to be freely retractable. There are two jogging rings 1 on the side opposite to the document side of the jogging guide 122.
23. Link pin 126 . that engages one side of 125 .
127 is provided.

Jogging link 123. The other end of 125 has a jockey lever 129 and a lever pin 130. It is engaged at 131.

Further, the jogging lever 129 is engaged with a jogging solenoid 132. Therefore, when the jogging solenoid 132 is turned on, the jogging guide 12
2 operates to press the sheet original P against the original reference guide 33, and the jogging solenoid 132 is turned off.
Then, the return spring 133 causes the shooting guide 12 to
2 moves away from the edge of the document.

That is, each time the sheet documents P are reloaded one by one on the document tray 1, the jogging solenoid 132 is turned 0N.
By repeating -OFF, the sheet original P is reliably pressed against the original reference guide 33, and the alignment of the sheet original P on the original tray 1 is improved.

Next, the operation of this embodiment will be explained using the flowchart shown in FIG.

At step 1 (represented by S in the figure), perform the tray UP process to raise the document tray 1 to the position indicated by the solid line in Figure 1. In the initial state where no documents are set, the tray is always raised, and the operation is performed. This makes it easy for people to set up.

Then, in step 52, the entrance sensor 47 detects whether or not a document has been set, and the operation is started by turning on a copy key on the operation section of the copying machine main body (not shown).

Next, in 5tep4, separation processing, which will be described later, is performed to feed the lowest sheet of the document bundle.

Next, the document separated in step 5 is conveyed onto the platen 3 after being subjected to paper feeding processing, which will be described later. When the paper feeding process is completed, the copying machine will start the copying operation. 5tep6), 5t
Proceeding to ep7, it is determined whether or not the partition lever has fallen, and if the determination is affirmative, the document is a single document, so
After waiting for the copying machine main body to finish copying (step 9), switchback paper ejection processing is started (step), and document conveyance control is ended. The original is returned to tray 1 through passes n and n.

If a negative judgment is made regarding the partition lever at step 7 (if there are multiple documents), the results of the document size detection process performed during the paper feeding process at step 5 and the mixed document specification on the operation panel of the copier main body are determined. The flow of conveyance control is determined according to the result of the determination as to whether or not the transfer has occurred (step 8).

In the case of this embodiment, the original size is A4 and mixed originals are not specified, so at 5 tepH, tray DOWN processing is performed to lower the original tray 1 to the position indicated by the broken line in Fig. 1, and the closed loop paper ejection processing described later is executed. Prepare to ensure the integrity of the output document.

Then, separate the next document (step 4')
, and after performing the pre-feeding process described later (step 13)
, wait for the copying machine to finish copying (step 9')
, 5tep14, it is determined whether the switchback circulation flag is set. In the case of this example,
In step 5, the switchback circulation flag is not set because the determination is negative, and the process proceeds to step 15 to start the closed-loop ejection process (the scanned original is ejected to tray 1 through path ■), which will be described later. Te (ste)
p15), perform paper feeding processing for the next document (step 5')
.

When the paper feeding process is completed, the copying machine main body starts the copying operation (step 6'), and it is determined whether the partition lever has fallen during the copying (step 8'), and if the determination is negative, the process is continued.

If the result in step 7' is affirmative, this is the final document, so wait for the copying machine to finish copying (step 9'), and then determine whether the switchback discharge flag is set. (ste
p14'), in this embodiment, as described above, the determination is negative, so the process proceeds to step 15', starts closed-loop paper ejection processing, and then waits for the ejection processing of all documents to be completed (step 16).

Next, it is determined whether the circulation is the final circulation (s
step 17), if it is the final circulation, move document tray 1 to the first
In order to raise the tray to the position indicated by the solid line in the figure, tray UP processing is performed to return the tray to its initial state (step 1'), and document conveyance control is ended. In step 17, if the determination is negative, it is determined whether the number of original sheets is 4 or less (step
p18), if the determination is affirmative, a switchback circulation flag is set (step 19), and the process returns to the separation process in step 5. If the determination is negative, the process directly returns to step 4. This is to perform optimal control depending on the number of originals.

In order to raise the document tray 1 to the position shown by the solid line in Fig. 1 at 5 tepl, perform the tray UP process, and make sure that the tray is raised in the initial state where no documents are set.
It is designed to be easy for the operator to set up.

Then, in step 52, the entrance sensor 47 detects whether a document has been set, and the operation is started by turning on a copy key in the operation section of the copying machine main body A (not shown).

Next, at step 54, separation processing, which will be described later, is performed to feed the lowest one sheet of the document bundle.

Next, the document separated in step 5 is conveyed onto the platen 3 after being subjected to paper feeding processing, which will be described later. When the paper feeding process is completed, the copying machine main body A starts the copying operation.5tep6), 5t
Proceeding to ep7, it is determined whether the partition lever 120 has fallen or not. If the determination is affirmative, since the original is a single original, the process waits for the copying machine A to finish copying (step 9).
, starts switchback paper ejection processing, which will be described later, and ends document conveyance control. The original is returned to tray 1 through the path ■'→■.

If the determination is negative in step 5, transport control is performed according to the result of the document size detection process performed during the paper feeding process in step 5 and the determination result of whether or not mixed document specification has been performed on the operation section of the copying machine main body A. determine the flow of (ste
p8). In the case of this embodiment, since the original size is A3 and mixed originals are not specified, the process advances to step 512 and a switchback circulation flag is set.

Then, separate the next document (step 4')
, and after performing the pre-feeding process described later (step 13)
, wait for copying machine A to finish copying (step 9').
), in step 14 it is determined whether the switchback circulation flag is set. In the case of this embodiment, since the affirmative determination was made in step 5, the switchback circulation flag is set, and the switchback paper ejection process (described later) is started (step 15), and the next document is fed ( step 5'). When the paper feeding process is completed, the copying machine will start the copying operation.5tep6'
), determine whether the partition lever has fallen during the copying (step 7'), and if the determination is negative, proceed to 5 steps.
Return to step 4' and continue processing.

If the result in step 7' is affirmative, this is the final document, so wait for the copying machine to finish copying (step 9'), and then determine whether the switchback discharge flag is set. (ste
p14'), in this embodiment, as described above, the determination is affirmative, so the process proceeds to step 5, starts the switchback paper ejection process, and then waits until the paper ejection process for all documents is completed (step 16).

Next, it is determined whether the circulation is the final circulation (s
step 17), if it is the final circulation, set document tray L to the first
In order to raise the tray to the position indicated by the solid line in the figure, tray UP processing is performed to return the tray to its initial state (step 1'), and document conveyance control is ended. In 5tep17, if the determination is negative, it is determined whether the number of original sheets is 4 or less, and (s
step 18), if the determination is affirmative, a switchback circulation flag is set (step 19), and the process returns to the separation process in step 4. If the judgment is negative, leave it as is, 5 step 4
Return to This is to perform optimal control depending on the number of originals.

At 5 tepl, perform the tray UP process to raise the original tray l to the position shown by the solid line in Figure 1, and make sure that the tray is raised in the initial state when no originals are set.
It is designed to be easy for the operator to set up.

Then, in step 52, the entrance sensor 47 detects whether a document has been set, and the operation is started by turning on a copy key on the operation section of the copying machine main body (not shown).

The following is the same as the case of document A3.

〔Effect of the invention〕

As explained above, by pressurizing the partition member from above the unprocessed sheet document and holding down the original, it is possible to prevent the processed document from slipping under the partition member and to prevent the document from colliding with the partition member. This makes it possible to accurately separate unprocessed and processed sheet originals and to improve reloadability of processed sheet originals.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a system diagram showing a drive system showing an embodiment of the invention, Fig. 3 is a plan view of the tray, Fig. 4(a), (b) is a detailed view of the partition member section, Figures 4 (c) and (d) are other examples of the document feeder, and Figure 5 is the RD.
A block diagram of the circuit configuration of the F control device, FIG. 6 is a flowchart of the present invention, FIG. 7 is a flowchart of another embodiment, FIG. 8 is an example of a document feeder having a reservation function, and FIG. 9 is a flowchart of the present invention. The overall flowchart in FIG. 10 is a conventional example. 1... Original tray 2... Wide belt 3... Platen glass 7... Partition member 39... Partition member motor 41, 42... Separation section P... Sheet original Figure 4 ( α) Yo3 //ri(b) //7th sh! /7 <b) /17 1st theta figure CC)

Claims (2)

[Claims] (1) In a circulating automatic document feeder having a tray on which a document is placed and a document partitioning means for detecting the end of a cycle of the document on the tray, the document partitioning means is placed on the tray. What is claimed is: 1. A circulation type automatic document feeder comprising a pressure means for pressing a document after the document is moved onto the document being held, and a pressure control means. (2) Before processing, the document partition means is placed on the tray before the first processed document passes over the document partition means on the unprocessed document placed on the tray. 2. The automatic circulating document feeder according to claim 1, further comprising a control means for pressurizing the document.