JPH0958891A - Sheet material separating automatic feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute document thrust preventing mechanism easily at low cost by forming a sheet material stop means for preventing the over-insertion of a sheet sheaf at the time of placing the sheet sheaf on a sheet placing base, as a rotating member. SOLUTION: At the time of setting documents S in an initial state with a stopper 5p standing by, the documents S are so set that the tips of the documents S collide with a stopper face 3e and stand by in a fixed position. The conveyance of the documents S is then started by a start button. When a feed roller 5b is rotated, a feed roller 5d with release source is put in inertial rotation, and a protrusion 5d pushes a release hook part 3b. The stopper 5p is thereby turned to the left to retreat the stop face 3e so as to open an inlet, and the documents S enter a separating part. At this time, a separating roller 5a is also rotated to feed the documents S sheet by sheet. When the last document S passes through the stopper 5p, the stopper 5p is lowered by its own weight, and an actuator 5m is also lowered. The vertical motion of the stopper 5p and the on-off of the actuator 5m are repeated until the reading of the documents S is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material separating automatic paper feeding device, and more particularly to a document separating mechanism in a reading device such as a facsimile.

[0002]

2. Description of the Related Art An automatic sheet feeder is provided with a document thrusting prevention mechanism to prevent excessive document thrusting.

[0003]

However, the above-mentioned conventional example cannot be mounted on a low-priced machine because the structure is complicated and the cost is significantly increased.

[0004]

In order to achieve the above object, according to the present invention, a sheet placing table and a separating and feeding means for separating a sheet bundle on the sheet placing table and feeding the sheets one by one, In the sheet material separating automatic sheet feeding device including the sheet material stopping means for preventing the sheet bundle from being excessively inserted when the sheet bundle is placed on the sheet placing table, the sheet material stopping means is a rotating member. Characterized by
Further, in a sheet material separating and automatic feeding device including a sheet placing table and a separating and feeding means for separating the sheet bundle on the sheet placing table and feeding the sheets one by one, the sheet bundle is fed to the sheet placing table. A sheet material stop means for preventing excessive insertion of the sheet bundle when the sheet is placed is provided, and the sheet material stop means uses the sheet material conveying means as a drive source.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION First, the overall configuration of an automatic document reading apparatus will be described.

As shown in FIGS. 1 and 2, in the image reading section 3, when stacking a document stack on the document mounting table 2 inclined by 15 ° or more, first, the document stack S is attached to the pre-pressing arm 5f and it. It is sandwiched between the pressure-separated separation rollers 5a and hits the stop surface of the stopper 5p, which is a feature of the present invention described later,
It is designed so that it cannot be pushed further into the interior. At this time, when the document S is stopped by a stopper 5p described later when setting the document, the document S is sandwiched between the pre-pressing arm 5f and the separation roller 5a so that the pre-conveying force is obtained. The position of the stop surface 3e (described later) is determined. Further, the rotation center of gravity 3 of the stopper 5p is located at a position where the stopper 5p does not lift up due to the document s being thrust.
Place a. As a result, an accurate document stop and a sufficient preliminary feeding force can be obtained.

Next, when the document conveyance is started, the stopper 5p is opened by the rotation of the opening moped feeding roller 5d,
The pre-pressing arm 5f and the separating roller 5a pressed against the pre-pressing arm 5f feed the friction piece 5k, and the separating roller 5a pressed against the friction piece 5k separates and feeds the sheets one by one. Further, it is conveyed to a contact image sensor (contact sensor) 7 by a paper feed roller 5d or the like which is in pressure contact with a paper feed roller 5d pressed by a pressing spring 5j, and an original S is pressed against the contact image sensor 7 by an original pressing plate. After the image information of the original S is read while sequentially feeding the originals while closely adhering to each other, the original S is shared by the discharge roller 5c that is in pressure contact with the discharge roller 5e that is pressed by the pressing spring 5j. It is designed to be discharged to the tray 12. During this time, the original S
Is guided by the upper document guide 16 and the lower document guide 19.

The structure of the document thrusting prevention member of the present invention will be described with reference to FIGS.

3a is a rotary shaft, 3b is an open hook, 3
c is a positioning part, 3d is an actuator interlocking part, 3e
Is a stop surface, and 3f is a curved surface having a radius R.

The rotating shaft 3a is provided in the main body of the document sticking prevention member 5p so that the rotating shaft 3a can be rotated without adding a shaft. Further, the opening catching portion 3b is provided on the main body of the document sticking prevention member 5p, so that the feeding roller 5d can be directly opened without a member interposed therebetween.

Further, due to the arrangement of the stop surface 3e and the rotating shaft 3a, the angle θ formed by the stop surface 3e and the lower document table 19 is made acute (around 70 to 80 °). As a result, FIG.
As shown in FIG. 8, at the time of opening, the stop surface 3e opens downstream from the front end of the document s, enabling smooth opening. Furthermore, this also prevents misfeeds.

Further, the actuator interlocking portion 3d is provided with the document thrusting prevention member 5p body, so that the position above and below the stopper can be detected without adding any member.

When the feeding roller 5d is rotated in the document conveying direction, the stopper 5p is opened.

FIG. 7 is a front sectional view of the original sticking-in prevention member of the present invention in an initial standby state. 5d is a feeding roller with an open source, and 19 is a lower original table. As shown in the figure, it was put on standby within 90 ° before the contact part.

9 (a) to 9 (c) and 10 (a) and 10 (b).
The outline of the stopper initialization operation is shown by. FIG. 11 shows a flowchart of stopper initialization control.

First, the stopper 5p stands by in the initial state (FIG. 9 (a)), and when the document S is set, the document S
The tip of the butt hits the stop surface 5e and stands by at a fixed position (FIG. 9 (b)). Next, the document transport is started by the start button. Therefore, the feeding roller 5b
When the rotation of the
d ₁ is open Press the catch 3b, rotate the stopper 5p counterclockwise to retract the stop surface 3e and open the inlet,
The document s enters the separation section. At this time, the separation roller 5a also rotates. Next, the friction piece 5k and the separation roller 5a pressed against it are separated and fed one by one. When the document passes through the final document stopper 5p, the stopper 5p is lowered by its own weight, and the actuator 5m is also lowered in conjunction with this (see FIG. 10).
(A)) After that, the roller 5a,
Interlocking with the rotation of 5b, the stopper 5p moves up and down, and the actuator 5m repeats ON and OFF (Fig. 10).
(B)). After the document is read, if the actuator is turned off (DS = OFF) during a certain step, after the actuator is turned off, the first time the actuator is turned on (DS = ON), the stopper 5p is lowered. Stop the motor at the position. In this way, it is possible to prevent the document from sticking in with a very simple structure.

Here, as shown in FIG. 7, the standby position of the protrusion 5d ₁ of the feeding roller 5d is 90 ° before the contact portion 3b.
The value of the Y step was selected and the puffless motor Mo was controlled so as to stand by at the position within.

Because the original is sandwiched between the separation roller 5a and the preliminary conveyance arm 5f, the original conveyance starts immediately when the motor starts, and the original is separated by the separation roller 5a.
Transported by. At this time, if the stopper 5p is not opened immediately, only the portion (center of the document) that is caught by the separation roller 5a is conveyed, and when the paper is thin, the portion that hits the stopper 5p is dammed and causes a jam.

On the other hand, in the case of plain paper, there is no problem because the separation roller 5a slides while hitting and stopping the stopper 5p.

By controlling the standby position of the feeding roller 5d, it is possible to cope with any paper quality from thin paper to thick paper. The position of the feeding roller 5d, that is, the position of the protrusion 5d ₁ is sensed by the sensor S1.

Next, the operation of the sensor will be described in detail.

When the document stack is inserted along the guide 19, the actuator 5m rises to turn on the sensor 5w.

After the roller 5d is rotated and the stopper 5p is rotated counterclockwise, the arm portion 5m1 is connected to the interlocking portion 3 even if the original bundle is lost.
Since it is suppressed by d, the actuator 5m is still raised and the sensor 5w is not turned off.

When the reading is completed and a reading end signal (generated from the sensor DES which detects that the trailing edge of the original has passed through the image sensor) is generated, X steps are counted, and in the meantime, the stopper 5p and the actuator are activated. If the actuator 5m swings and the actuator 5m detects that there is no document (actuator 5m is off), the actuator 5m turns on the sensor 5w for a predetermined amount. The Y step is counted and the motor Mo is stopped. As a result, the roller 5d is set to the initial standby state shown in FIG.

As described above, according to the embodiment of the present invention, in the document thrust preventing mechanism which is opened by the document transporting means, by controlling the standby position of the opening source protrusion of the document transporting means, from thin paper to thick paper. Up to now, any paper quality can be supported. As a result, the automatic paper feeding device can be reliably separated, the defective rate is significantly reduced, and the quality is dramatically improved.

Further, the automatic paper feeder is characterized in that a document thrusting-in prevention member which returns by its own weight is attached.

In the above structure, since the original document thrust prevention member returns by its own weight, a complicated configuration for the return is not required, and the original document thrust prevention can be achieved with a very simple structure.

The automatic paper feeder is characterized in that a document sticking-in prevention member which is rotated and opened by the document conveying means is attached.

In the above structure, by preventing the original document sticking-in prevention member from being rotated and opened by the original document conveying means, the original document sticking-in prevention can be achieved with a very simple structure.

The automatic paper feeder is characterized in that a document-pushing-preventing member is provided which is rotated and opened by the document-transporting means and whose stop surface is located downstream of the position where the preliminary transporting force can be obtained.

In the above structure, by preventing the original document sticking-in prevention member from being rotated and opened by the document carrying means, the original document sticking-in prevention can be achieved with a very simple structure. Further, by disposing the stop surface downstream from the position where the preliminary conveying force is obtained, sufficient preliminary conveyance can be performed.

The above-mentioned document sticking-in prevention member is characterized by having a rotating shaft.

In the above construction, by providing the main body of the document thrust preventing member with a rotary shaft, the main body can be rotated without adding another shaft, and the cost can be reduced.

In the document thrusting prevention member, the rotation center of gravity is arranged at a position where the document is not lifted when the leading edge of the document strikes the document thrusting prevention member.

In the above structure, when the stopper is made to stand by only by its own weight, the stopper will not be lifted up due to the original being stuck.

In the document thrusting prevention member, the angle formed by the stop surface 3e and the lower document table is an acute angle.

In the above construction, the angle formed between the stop surface 3e and the lower document table is made acute so that the document can easily enter when entering the document.

In the document thrusting prevention member described above, an R curved surface is formed below the stop surface 3e.

In the above structure, the lower portion of the stop surface 3e is formed into the R curved surface so that the original can easily enter when the original enters.

In the document thrusting prevention member, the rotary shaft and the stop face are arranged so that the stop face is rotated and opened downstream from the front end of the document of the document set in the conveying direction.

In the above structure, by disposing the rotation shaft and the stop surface so that the stop surface is rotated and opened downstream from the leading edge of the original when the original is set, the original is not pushed back upstream from the setting, and Feeding is prevented.

In the document thrusting prevention member, there is provided a movable portion during normal document transportation, for example, a document transporting means, more specifically, a part for obtaining an opening force directly from the document transporting roller. Prevention member.

In the above structure, by having a portion that directly obtains the opening force from the movable portion during normal document transportation, the document is prevented from being stuck with a simple structure without adding a member between the document sticking prevention member and the opening source. A mechanism can be created.

The above-mentioned document sticking-in prevention member is characterized by having a stop surface, a rotating shaft, and an open hook portion.

In the above-described structure, by providing the original document insertion preventing member with a plurality of functions, the original document insertion prevention mechanism can be realized with a simple structure without increasing the number of parts.

The above-described document thrusting prevention member is characterized by having an interlocking portion for initializing (position detection) the document thrusting prevention member.

In the above structure, by having the interlocking portion for initializing (position detecting) the document thrusting prevention member, the document thrusting preventing member can be initialized without adding a member, resulting in a very low cost structure. .

The document thrust prevention member is characterized by having an interlocking portion with another detection sensor (for example, a paper presence / absence detection sensor).

In the above-mentioned structure, by having the interlocking part with other detection sensor, the initialization of the document sticking prevention member (position detection) can be performed without adding any member, so that the structure is very low in cost.

The above-mentioned document sticking-in prevention member is characterized by having a stop surface, a rotating shaft, an open hook portion, and an interlocking part for initializing (position detection) the document sticking-in prevention member.

In the above-described structure, by providing the original document insertion preventing member with a plurality of functions, the original document insertion prevention mechanism can be realized with a simple structure without increasing the number of parts.

In the automatic sheet feeding device, the means for initializing the document sticking-in prevention member is obtained from a sensor.

In the above construction, by obtaining the initialization means from the sensor, the document sticking-in prevention member can be made to wait properly at a predetermined position.

The automatic paper feeder is characterized in that it is also used as an initialization sensor for the document thrusting prevention member and other detection sensors (for example, paper presence / absence detection sensor).

In the above structure, by sharing the initialization means with other detection sensors, the document sticking-in prevention member can be made to wait properly at a predetermined position without adding any parts. Therefore, there is no cost.

(Second Embodiment) As shown in FIGS. 12 to 13, a pair of left and right stoppers 5p may be provided. As a result, the document can be suppressed at both ends, and the consistency is further improved. However, one stopper does not have the portions 3b and 3c.

(Third Embodiment) As shown in FIG. 14, the effect is the same even if there are four stop surfaces of the document thrusting prevention member. Only one is formed 3b, 3c.
On the other hand, if four stopper 5p ₁ ~5p ₄ in exactly the same configuration (3b, provided 3c), mass-production effect is large. The same applies to the case of the second embodiment.

As described above, the second embodiment of the present invention,
According to 3, by having multiple stop surfaces,
The left and right sides of the document are balanced to prevent skewing of the document.

(Fourth Embodiment) As shown in FIG. 15, the same effect can be obtained by inserting a spring clutch 5t between the feeding roller 5s and the releasing member 5u.

In the case of this construction, as shown in FIG. 16, when the feeding roller 5b rotates in the document conveying direction, the spring clutch 5t becomes the closed side and the stopper 5p is released. However, the spring clutch 5t cannot be tightened unless a certain torque or more is applied. In reality, the stopper 5p is released before the spring clutch 5t is tightened, because the weight of the stopper 5p and the friction between the leading edge of the original and the stop surface are the only factors. That is, sufficient torque to open the stopper 5p can be obtained at the time of play until the spring clutch 5t is closed.
During the rotation of the roller 5s, the protrusion 5u and the open hook portion 3b maintain the state of FIG. 16 (a).

Thereafter, until the reading of the original is completed, the same as in the first embodiment, after the original is ejected, the motor is rotated in the reverse direction to reverse 5U to release the stopper. The stopper 5p rotates rightward by its own weight, but since it does not go down below the position shown in FIG. 16 (b), when the protrusion 5u that has been reversed comes into contact with it, the spring clutch 5t moves at that position. It becomes the loose side and returns to the standby state. In this case also, the document sticking-in prevention mechanism can be formed with a simple structure. Figure 16 (b)
The state of indicates the state in which the next document bundle is inserted thereafter.

(Fifth Embodiment) As shown in FIG. 17, a torque limiter 5r is provided between the feeding roller 5s and the releasing member 5u.
The same effect can be obtained through.

In the case of this structure, as shown in FIG. 18, when the feeding roller 5b rotates in the document conveying direction, the stopper 5
When p is released and hits the upper platen, the torque limiter 5r idles beyond the limit value T. While the roller 5s is rotating,
The state of FIG. 18A is maintained. After that, the stopper 5p remains released until the original is discharged, and after the original is discharged, when the motor is rotated in the reverse direction, the stopper 5p goes down, hits the lower original table, the torque limiter 5r idles beyond the limit value T, and returns to the standby state. . In this case also, the document sticking-in prevention mechanism can be formed with a simple structure.

As described above, Embodiment 4 of the present invention
According to 5, it is possible to prevent the conveyance failure due to the plunge when setting a document, which has been a big problem up to now, with a low cost and a simple configuration, and the user does not care when setting the document and it is constant regardless of who sets it. It is possible to set the original.
As a result, the automatic paper feeding device can be reliably separated, the defective rate is significantly reduced, and the quality is dramatically improved. Furthermore, since the projection 5u can be stopped regardless of the rotation of the rollers 5b and 5s, the stopper 5p is held at the release position and the vertical swing is prevented.

(Sixth Embodiment) As shown in FIG. 19, the same effect can be obtained even if the initialization sensor of the document thrust prevention stopper is also used as the document width detection sensor. in this case,
The left initialization sensor 5m is used for width detection only when the document is set, and thereafter is used as an initialization sensor for the document thrust prevention member. As the width detection sensor, the width of the manuscript is determined by detecting the presence or absence of both end portions of the document with the right and left arm portions 5 m ₄ . The state shown in the figure shows a state in which there is no document and the arm portion 5m ₄ is rotated rightward and descended.

(Seventh Embodiment) As shown in FIG. 20, the same effect can be obtained by providing a sensor dedicated to the initialization of the document thrusting prevention stopper. In this case, turn on sensor 5w
A lever portion 3g that turns off and on is formed on the stopper 5P. Behind the sensor 5w is document sensor arm portions 5 m ₅ is formed.

(Eighth Embodiment) As shown in FIG. 21, the same effect can be obtained even with a document sticking prevention member attached to the leader frame 11. Also in this case, the rotating shaft 3
a, stop surface 3e, R curved surface 3f, open hook 3b
have.

In operation, as shown in the perspective view of FIG. 22, when the separating roller 5a rotates in the A direction, the catch 3r of the shaft-integrated mold core 3q lifts the open catch 3b of the stopper in the B direction to stop. The surface 3e is lowered in the C direction and opened. In this case, the spring member SP is needed. The ascending force after opening is suppressed by contacting the lower surface of the document.

FIG. 23 is a front sectional view of the automatic paper feeder when the eighth embodiment is attached. In this case also, although the spring member for maintaining the raised position is required, the document sticking-in prevention device can be configured with a simple configuration.

FIG. 24 is a diagram in which a facsimile apparatus is used as an image recording apparatus according to the present invention, and an outline of the entire apparatus will be described.

In FIG. 24, 1 is the apparatus main body, 2 is a document cover shared cartridge cover configured so that a plurality of originals S can be stacked on the top cover of the apparatus main body 1, and 3 is image information of the original S. An image reading unit for reading the image, a recording apparatus main body including a laser beam printer, a document conveying unit, a document pressing unit 6, a contact image sensor 7,
Reference numeral 9 is a laser scanner, 10 is an image forming unit, 12 is an original / straight recording paper common discharge tray, 15 is a U-turn recording paper discharge stand, 13 is a cassette unit, 17 is an ADF (auto document feeder) cover, and 16 is An upper document guide, 18 is a document pressing plate, 19 is a lower document guide, 20 is a reading unit frame, 21 is a control unit of a facsimile apparatus, and 23
Is a conveyance guide, 28 is a light cover, and 30 is a recording paper feeding / separating unit.

The control unit 1 of FIG. 26 controls the operation of the entire apparatus and manages various data by software control of a microcomputer, and is composed of a CPU, ROM, RAM, timer and the like. Further, various sensors such as DS and DES are detected, and a timer (counting by the timer) controls the reading operation or the initialization of the thrust prevention member. Incidentally, CS is a contact sensor.

[0073]

As described above, according to the present invention,
A sheet-pushing-in prevention member can prevent a conveyance failure due to a plunge when setting a document with a low cost and a simple structure. Is possible. As a result, even an inexpensive machine can reliably separate the automatic paper feeder.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view of a document reading automatic paper feeder of a facsimile equipped with a document thrusting prevention member.

FIG. 2 is a top view of an upper document table unit including a document thrusting prevention member.

FIG. 3 is an external perspective view of a document tampering prevention mechanism including a document tampering prevention member.

FIG. 4 is a perspective view of a document sticking-in prevention member according to an embodiment of the present invention.

FIG. 5 is a three-sided view of a document thrust prevention member.

FIG. 6 is a perspective view of a document sensor actuator.

FIG. 7 is a front view showing the relationship between a guide, a roller, and a stopper.

FIG. 8 is a front view showing a rotation opening locus of the document thrusting prevention member from a standby state.

FIG. 9 is an operation explanatory diagram of the document reading automatic paper feeder of the facsimile with the document thrusting prevention mechanism.

FIG. 10 is an operation explanatory diagram of the same.

FIG. 11 is a flowchart.

FIG. 12 is a perspective view showing a second embodiment of the stopper.

FIG. 13 is a perspective view showing a relationship between the stopper of FIG. 12 and a roller.

FIG. 14 is a perspective view showing a third embodiment of the stopper.

FIG. 15 is a perspective view showing a fourth embodiment.

FIG. 16 is an operation explanatory diagram of the fourth embodiment.

FIG. 17 is a perspective view showing a fifth embodiment.

FIG. 18 is an operation explanatory diagram of the fifth embodiment.

FIG. 19 is a perspective view showing a sixth embodiment.

FIG. 20 is a perspective view showing a seventh embodiment.

FIG. 21 is a perspective view showing an eighth embodiment.

FIG. 22 is a perspective view showing an assembled state of the eighth embodiment.

FIG. 23 is a front view of the eighth embodiment.

FIG. 24 is a front cross-sectional view of a facsimile equipped with a document sticking-in prevention member.

FIG. 25 is an external perspective view of a facsimile equipped with a document thrusting prevention mechanism according to the first embodiment of the present invention.

FIG. 26 is a block diagram.

[Explanation of reference symbols] 3a Rotating shaft 3b Open catching part 3c Positioning part 3d DS Actuator interlocking part 3e Stop surface 3f R curved surface 5a Separation roller 5b Feeding roller 5c Discharging roller 5d Opening original feeding roller 5e Discharging roller 5f Spare Transport arm 5g Tension spring 5h Friction piece holder 5i ADF spring 5j Leaf spring 5k Friction piece 5m DS 5n DES 5p Stopper 11 Leader frame 16 Upper manuscript guide 19 Lower manuscript guide

Claims (23)

[Claims] 1. An automatic sheet material separating / feeding device comprising: a sheet mounting table; and a separating / feeding means for separating and feeding the sheet bundle on the sheet mounting table one by one, to the sheet mounting table. An automatic sheet material separation sheet feeding device, comprising sheet material stop means for preventing excessive insertion of the sheet bundle when the sheet bundle is placed, and the sheet material stop means is a rotating member. 2. The sheet material separating automatic sheet feeder according to claim 1, wherein the rotating shaft of the rotating member is integrally formed. 3. The sheet material separating automatic sheet feeder according to claim 1, wherein the center of rotation of the rotating member is arranged at a position where the sheet does not lift up when the leading edge of the sheet hits. 4. The rotating shaft and the stop surface are arranged so that the stop surface is rotated and opened downstream from the front end of the sheet when the sheet is set in the conveying direction.
Sheet material separation automatic paper feeder. 5. The sheet material separating automatic sheet feeder according to claim 1, wherein an angle formed by the stop surface of the rotating member against which the end surface of the sheet material abuts and the sheet mounting table is an acute angle. 6. The sheet material separating automatic sheet feeder according to claim 1, wherein a curved surface is formed below the stop surface of the rotating member against which the end surface of the sheet material abuts. 7. The sheet material separating automatic sheet feeder according to claim 1, wherein a plurality of rotating members are provided in a direction intersecting the sheet feeding direction. 8. The sheet material separating automatic sheet feeder according to claim 4, wherein the rotating member rotates upward. 9. The sheet material separating automatic sheet feeder according to claim 1, wherein the rotation driving source of the rotating member is a conveying means of the apparatus main body. 10. The automatic sheet material separating apparatus according to claim 9, wherein the conveying means is a conveying roller, and the rotating member is rotated to the retracted position in response to the start of rotation of the conveying roller. 11. The sheet material separation automatic sheet feeder according to claim 10, wherein the transmission means is fixed to the rotary shaft of the conveying roller. 12. The sheet material separation automatic sheet feeder according to claim 10, wherein a transmission means is provided on the rotary shaft of the conveying roller via a clutch. 13. The sheet material separation automatic sheet feeder according to claim 10, wherein a transmission means is provided on the rotation shaft of the conveying roller via a torque limiter. 14. The rotating member is rotated upward by the conveying means, but the return is lowered by its own weight.
Sheet material separation automatic paper feeder. 15. The sheet material separating automatic sheet feeder according to claim 9, wherein the rotating member stop surface is arranged downstream of a position where a preliminary conveying force can be obtained. 16. The rotating member rotates upward.
Sheet material separation automatic paper feeder. 17. The rotating member rotates downward.
Sheet material separation automatic paper feeder. 18. A sheet material separating automatic sheet feeding device comprising: a sheet placing table; and a separating / feeding means for separating the sheet bundle on the sheet placing table and feeding the sheets one by one, to the sheet placing table. A sheet material stop means for preventing excessive insertion of the sheet bundle when the sheet bundle is placed, and the sheet material stop means uses a sheet material conveying means as a drive source. apparatus. 19. The sheet material separating automatic sheet feeder according to claim 18, wherein the separating and feeding means includes a pair of separating means and a pair of conveying means downstream thereof. 20. The sheet material separating automatic paper feeder according to claim 19, wherein the conveying means is a conveying roller, and the stop means is pushed up and retracted by the rotation of the roller shaft. 21. The open projection of the original feeding device with open source is controlled so as to stop within about 90 ° in front of the inoculation section with the open catch section of the original sticking prevention member. Automatic sheet feeder for sheet material separation. 22. A reading device comprising the sheet material separating automatic paper feeding device according to any one of claims 1 to 21 and reading a separated and fed original document. 23. A facsimile apparatus comprising the sheet material separating automatic paper feeding device according to claim 1, reading a separated and fed original document, and communicating the read document.