JPH09301559A - Paper sheet separating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of overlap feed of letters different in size, thickness and material by providing a protruding means protruded more onto the stacking means side than a contact face with which a delivery means and delivered paper sheets come in contact, and fitted in such a way as to recede from the contact face when force of certain value or more acts thereon. SOLUTION: A thin letter out of letters fed close to a delivery belt has light weight so as to be easily sucked to the delivery belt by suction force from a chamber 3, but a protruding lever 7 cannot be pushed in completely by this thin letter sucked to the delivery belt, against a spring connected to the protruding lever 7, so that the sucked thin letter near the protruding lever 7 is formed into a three-dimensional deformed state not in contact with the delivery belt. On the other hand, suction force from the chamber 3 does not act upon a letter following the letter sucked to the delivery belt, so that force by the protruding lever 7 acts almost uniformly upon the following letters so as to be put in a two-dimensional deformed state. Pressure air is blown into a clearance generated between both letters.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for separating and feeding out a bundle of paper sheets one by one, and particularly to a size,
The present invention relates to a letter separation device that separates and feeds out letters having different thicknesses and materials.

[0002]

2. Description of the Related Art As an example of a device for separating and feeding out a bundle of paper sheets one by one, for example, there is a device for individually taking out a shipment as disclosed in Japanese Patent Laid-Open No. 6-321372. In this device, in order to prevent so-called double feeding in which paper sheets (shipments) are pulled out in a stacked manner, the space between the paper sheets is set within the support surface on which the paper sheets are stacked and the guide wall for guiding the paper sheets. A nozzle for blowing pressurized air is arranged on the nozzle, and another nozzle is arranged between the guide wall and the passage gap. And
The pressure air is blown from these nozzles in a direction opposite to the conveying direction of the paper sheets at a predetermined inclination, whereby the paper sheets are disaggregated and the double feeding is reduced.

[0003]

In the above-mentioned conventional example, in order to reduce the double feeding when separating and feeding out the paper sheets one by one, the compressed air is used between the bundled paper sheets. It tries to create a space. However, especially in the case of thin paper sheets such as vinyl and cellophane, due to the influence of static electricity, moisture, etc., it is not possible to create a space between the sheets simply by blowing pressurized air, There was a problem that double feeding could not be reduced.

It is an object of the present invention to realize a letter separating device capable of separating and feeding out letters having different sizes, thicknesses and materials, one by one, without causing double feeding.

[0005]

In order to solve the above problems, in the paper sheet separating apparatus of the present invention, a stacking means for stacking a bundle of paper sheets, and a paper sheet on the stacking means. Feeding means for feeding the paper, feeding means for feeding the bundle of paper sheets on the stacking means toward the feed means, and sucking the paper sheets on the stacking means toward the feed means In addition, when the paper sheets are adsorbed to the delivery means and delivered, a chamber having a negative pressure inside, and the frontmost sheet on the stacking means is adsorbed to the delivery means and delivered, The sheet feeding device has a resistance means for preventing adjacent sheets from being fed out at the same time as a sheet to be fed out, and a detection means for detecting that the frontmost sheet is adsorbed by the feeding means, The means and the paper sheets fed out come into contact Protruding means is provided that protrudes from the contact surface toward the stacking means and retracts from the contact surface when a force of a certain value or more is applied, and the letter near the front of the bundle of paper sheets A blowing nozzle means for blowing pressurized air from the side frame is provided. With the above configuration, when a thin letter is sent, the letter contacting the feeding means is deformed by the force from the protrusion means on the upper side which is not adsorbed by the chamber, and is not in contact with the feeding means. The letter of is not attracted by the suction force of the chamber.
No deformation occurs because the force from the protrusion means is received evenly,
It is easy to separate the two.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, as one embodiment of the present invention,
An example of a letter separating device that separates and sends out postal letters such as postcards and sealed letters will be described with reference to FIGS.

FIG. 1 is a schematic view of the letter separating apparatus of the present invention. The separating apparatus shown in FIG. 1 includes a loading platform 1 for loading a bundle of letters to be separated, a plurality of delivery belts 2 for delivering the frontmost letter of the bundle of letters on the loading platform 1, and a loading platform 1. The uppermost letter in the bundle shape is sucked in the direction of the feeding belt 2, and the chamber 3 having a negative pressure inside it so that the letter is drawn by the feeding belt 2 and drawn out. When the frontmost letter is adsorbed to the feeding belt 2 and fed out, a separating pad 4 as a resistance means for preventing the letters adjacent to the letter to be fed out at the same time, near the frontmost part of the letter on the loading platform Nozzle 5 for blowing pressurized air to the letter, a detection lever 6 for detecting that the frontmost letter is adsorbed on the feeding belt 2, and is attached so as to project from the adsorption surface A of the feeding belt 2 to the stacking table side. A projection lever 7, a feed belt 8 and a fork 9 for feeding a bundle of letters on the stacking table 1 toward the feeding belt 2, an upper guide 10 for supporting forward tilting above the letter, and a detection lever 6. The detection lever sensor 11 is composed of a light emitting element and a light receiving element for detecting the position, a letter position detecting sensor 12 for detecting the position of a letter to be fed out and a succeeding letter, and a frame 13.

The feeding belt 2 has a surface coated with a material having a high coefficient of friction for feeding a letter, and
A plurality of holes 1 for applying the negative pressure of the chamber 3 to the letter
4 are provided. As shown in FIG. 2, the feeding belt 2 is tensioned by a pulley 15 for driving the feeding belt 2 and a roller 16 which is rotated by the feeding belt. The drive pulley 15 is driven by a servo motor (not shown).

Further, as the feeding belt 2 in this embodiment, a hard belt which is hard to wear is used so that the amount of the nesting state with the separation pad 4 as described later does not change.

On the surface B of the chamber 3 on the side of the loading table, holes 17 are provided similarly to the holes 14 of the feeding belt 2.
The inside of the chamber 3 is in a negative pressure state lower than the atmospheric pressure by a blower (not shown). Due to this negative pressure, the letters on the loading table 1 are attracted toward the delivery belt 2 and attracted to the delivery belt 2. To do. The conveyance force that acts on the drawn letter increases as the attraction force and the coefficient of friction of the feeding belt 2 increase.

The width dimension and the height dimension of the chamber 3 are determined in accordance with the minimum dimension of the letters handled by the separating device. Regarding the width dimension, the letter position detection sensor 12 provided adjacent to the chamber 3 must be provided within the minimum width dimension of the letter in order to detect the letter position. Therefore, the width dimension of the chamber 3 is smaller than this.

As will be described later, the height of the chamber 3 is such that when the letter position detecting sensor 12 detects that the letter is nipped in the conveying path 27 downstream of the separating device, the drive of the feeding belt is stopped. If the distance between the transport path 27 and the uppermost portion of the feeding belt is smaller than the shortest dimension of the letter, double feeding of letters does not occur. Therefore, the height dimension of the chamber 3 is
It is set to satisfy this condition.

By the way, in the separation apparatus of this embodiment, the chamber 3 is divided into three chambers by partition plates 3A and 3B as shown in FIG. The three chambers are connected by the orifices 3C and 3D provided on the partition plate. A hole 3E is provided in the upper chamber 3R and is connected to a blower (not shown) and a pipe 3F. The partition plate 3A
The position of is approximately the same height as the position of the loading platform.
The reason why the chamber is divided into a plurality of rooms in this way is as follows.

When holes are provided on the surface of the chamber 3 below the loading platform 1 and the entire surface of the feeding belt 2 as in this embodiment, the letter on the loading platform 1 is fed to the feeding belt 2. Even if it is adsorbed, since the hole below the loading platform 1 is open, the negative pressure in the chamber is reduced without the partition plate. Therefore, the chamber 3 is partitioned by partition plates 3A and 3B provided with orifices as shown in FIG. 3, and the hole below the loading table 1 of the chamber 3 is made smaller, so that the uppermost part important for sucking a letter can be obtained. It is possible to suppress a decrease in negative pressure in the room. Even if the hole of the chamber 3 below the loading table 1 is small, the size of the hole of the feeding belt 2 does not change, so that the suction force important for conveying a letter does not decrease.

The separating pad 4 comprises a plurality of feeding belts 2.
It is arranged so as to come between. Further, the separation pad 4 and the feeding belt 2 are arranged in a nest as shown in FIG. When the separation pad and the feeding belt are arranged in this way, the leading end of the first letter is deformed along the nesting portion, but the letters after the second letter are less likely to be deformed, so that letters other than the letter to be fed are not changed. It is difficult to enter the nesting part, and it is possible to prevent double feeding of letters.

The separation pad 4 is mounted so as to be able to move according to the thickness of the letter to be drawn out, so as to be pressed against the chamber 3 by the spring means 4A, 4B from the back side as shown in FIG. The separation pad 4 and the chamber 3 may be in contact with each other as shown in FIG. 4, but the position of the separation pad 4 is determined by using another stopper 4C as shown in FIG. A gap may be provided between them.

The frame 13 is provided with a blowing nozzle 5 for blowing pressurized air to the letter near the front of the bundle of letters. A chamber (not shown) is provided on the back side of the frame 13, and pressurized air is supplied to the chamber from a blower (not shown) and blown out from a nozzle. The height position of the blowing nozzle 5 is between the uppermost hole 17A of the chamber 3 and the projection lever 7 as shown in FIG.

The detection lever 6 has a dogleg shape and is attached to the shaft 18 so as to be rotatable. A spring 19 is attached to a part of the detection lever,
The spring 19 is hung on a spring mounting shaft 20. Also,
A stopper 21 is provided near the end of the detection lever 6 on the side opposite to the letter contact portion 6A to prevent the detection lever 6 from rotating due to a spring force. When the letter is not on the suction surface A, the position of the stopper 21 is adjusted so that the letter contact portion 6A of the detection lever 6 is positioned so as to project from the suction surface A of the feeding belt 2 toward the stacking table. There is. When the letter is on the suction surface A, the letter contact portion 6A is configured to be pushed and retracted by the letter.

The projection lever 7 is also rotatably mounted on the shaft 18. A spring 22 is also attached to a part of the protrusion lever, and the spring 22 is hung on the spring attachment shaft 20. Further, a stopper 21 is provided near the end of the projection lever 7 on the side opposite to the letter contact portion 7A to prevent the projection lever 7 from rotating due to a spring force. The position of the letter contact portion 7A of the protrusion lever 7 when the letter is not on the suction surface A is such that the position of the letter lever 7 is further projected from the position of the letter contact portion 6A of the detection lever 6 toward the loading platform. The shape of 7 and the position of the stopper 21 are adjusted. Further, the mounting position of the protrusion lever 7 in the width direction is a position displaced from the center of the letter in the width direction.

On the loading table 1, the letter-conveying surface 8A of the feed belt 8 is provided so as to be slightly higher than the loading table. The feed belt 8 is a drive pulley 2 as shown in FIG.
3 driven. A driving force is transmitted to the driving pulley 23 from a servo motor (not shown). The letter conveying surface 8A of the feed belt is covered with a material having a high friction coefficient so that the letter can be conveyed.

The fork 9 is provided so as to project from a long hole portion 24 provided in the frame 13. The fork 9 is attached to a chain (not shown) behind the frame 13 and is driven by a servo motor (not shown).

The feed belt 8 and the forks 9 are driven in synchronization. Turning the drive on and off is determined by the operation of the detection lever 6. When there is no letter on the suction surface A of the feeding belt 2 and the letter contact portion 6A of the detection lever 6 is out of the suction surface A, the detection lever 6 comes out from the light emitting element of the detection lever sensor 11. Do not block the light that is present. In this case, the feed belt 8 and the forks 9 are driven so as to feed a letter. When the letter is sucked and sucked by the feeding belt 2, the detection lever 6 is pushed by the suction force. At this time, the detection lever 6 shields the detection lever sensor 11 from light, and the drive of the feed belt 8 and the fork 9 is stopped by this signal.

A guide 25 is provided on the side of the feeding belt of the stacking table 1, and a tip of the guide 25 has a flexible shape for preventing a letter from falling between the separation pad 4 and the feeding belt 2. An auxiliary guide 26 made of an elastic material is provided.

Letters to be separated are stacked in a bundle on the stacking table 1. The stacked letters are sent in the direction of the payout belt 2 by the feed belt 8 and the forks 9. The surfaces of the loading table 1 and the guide 25 are covered with a material having an extremely low coefficient of friction such as a plastic sheet so that the letters can be fed smoothly. Therefore, even after the feed belt is cut off, the letter sent from the rear or the front of the bundle of letters due to the suction force from the chamber is sent to the delivery belt side.

Next, the letter separating operation will be described. A problem when a letter is delivered is double feeding in the case of a thin letter, and insufficient feeding force in the case of a thick letter.
In this embodiment, these problems are solved as follows.

Among the letters sent to the vicinity of the feeding belt 2, a thin letter has a small weight and is easily adsorbed to the feeding belt 2 by the suction force from the chamber. At this time, the letters adsorbed on the feeding belt 2 are detected by the detection lever.
Since 6 is pushed in, driving of the feed belt 8 and the fork 9 is stopped. Since the speed at which the thin letters are adsorbed by the feeding belt 2 is faster than the driving speed of the feed belt 8 and the forks 9, the density of the letter bundle near the feeding belt 2 is small, and in this portion, the space between the letters is small. A gap is easily created.

As shown in FIG. 6, the thin letter S1 attracted to the feeding belt 2 also tries to push in the projection lever 7. However, the spring 22 connected to the protrusion lever 7
Is attached with a spring having a larger spring constant than the spring 19 connected to the detection lever 6. Therefore,
The protrusion lever 7 is not completely pushed in only by adsorbing a thin letter, and the vicinity of the adsorbed thin letter protrusion lever 7 does not come into contact with the feeding belt 2 and is separated, and as shown in FIG. It will be in a deformed state.

On the other hand, the suction or suction force from the chamber 3 does not act on the letter S2 following the letter S1 sucked by the feeding belt 2. Therefore, since the force by the protrusion lever 7 acts substantially uniformly on the letters thereafter, three-dimensional deformation does not occur, and only a two-dimensional deformed state such as simple bending deformation as shown in FIG. At this time, between the thin letter S1 attracted to the feeding belt 2 and the succeeding letter S2,
A gap occurs on the frame side due to the difference in the deformation state. A large amount of peeling force acts between these letters S1 and S2 because pressurized air is blown out from the blowout nozzle 5 provided in the frame into this gap. Therefore, the portion of the bundle of letters near the feeding belt 2 is in a separated state due to a gap between the letters, and even when these letters are stuck to each other due to the influence of static electricity, a gap is generated between the letters. It becomes easy to prevent the succeeding letter S2 from being fed at the same time when feeding.

Another advantage of keeping the letters in a separated state is that space is generated between the letters even when the letters S4 are not aligned in the end face position as shown in FIG. Is dropped on the loading platform 1 and the bottom surfaces are aligned as in the case of the letter S3. As shown in FIG. 7, when the bottoms of the letters are not aligned, the suction force acts on both the frontmost letter and the subsequent letters, so that double feeding is likely to occur. By separating the letters, it is possible to prevent double feeding due to uneven letters.

In the letter separating apparatus of this embodiment, the frame 13 is attached at a certain angle with respect to the vertical plane as shown in FIG. 7, so that the loading platform 1 also becomes higher on the front side. Leaning on. Therefore, it is also possible to align the side end faces on the back side of a letter with irregular end faces by separating the letters as described above to create a gap.

When handling letters of different sizes, the side edges may not be aligned due to the difference in the widthwise dimension. If the degree of this irregularity is large, double feeding is likely to occur. In order to prevent this, the hole of the feeding belt 2 on the frame side may be eliminated, and the corresponding hole of the chamber may be eliminated.

If the pressure air blown from the blowing nozzle 5 has an excessively high strength, the letters on the loading table are blown off. Therefore, the strength of the pressurized air from the blowing nozzle 5 is adjusted so that the letter is not blown off.

Among the letters sent to the vicinity of the feeding belt 2, the thick letters have a large weight, and therefore, unlike the thin letters, the suction force from the chamber 3 does not suck them into the feeding belt 2. Therefore, for a thick letter, it is necessary to press the feeding belt 2 against the feeding belt 2 in order to attract the letter to the feeding belt 2. If the pressing action is insufficient, the feeding force acting on the letter is insufficient, and problems such as feeding failure and reduction in processing capacity occur.

When a thick letter is pressed against the feeding belt by a fork, the projection lever 7 is pushed in like the detection lever 6 as shown in FIG. If the force of the spring 22 connected to the protrusion lever 7 is excessively large, the resistance force acting on the letter also becomes large, so that the protrusion lever 7 is not pushed completely. In this case, the letter is not attracted to the feeding belt 2 and is still defective. Therefore, the spring 22 of the protrusion lever 7 is attached to such an extent that a thick letter can be pressed against the feeding belt 2.

The upper guide 10 attached to the upper portion of the chamber 3 prevents the letter sent to the feeding belt 2 from excessively falling and being pressed against the feeding belt 2 excessively. Further, the shape of the upper guide 10 is a shape that fulfills such a function.

The tip of the letter near the feeding belt 2 is
It is guided by the guide 25 and has a wedge shape as shown in FIG. Of these, only the letter S1 attracted to the feeding belt 2 is fed by the feeding belt 2, and the following remaining letters are prevented from being fed by the separation pad 4 and the auxiliary guide 26. Even when the succeeding letter enters between the feeding belt 2 and the separating pad 4, the separating pad 4 exerts a frictional resistance force on the succeeding letter, which resistance force is larger than the feeding force acting from the fed letter. Therefore, these letters will not be sent in layers. In this way, the bundled letters are separated and fed out one by one.

In the letter separating apparatus of this embodiment, the distance between the letters to be fed out is a constant value regardless of the length of the letters. Next, this operation will be described.

When the letter is fed, the letter position detecting sensor 12 detects the leading end and the trailing end of the letter S1 that has been fed, and the leading end of the succeeding letter S2. When the leading end portion of the drawn out letter S1 is clamped in the transport path 27 downstream of the separation device, the detection sensor 12 in this portion as shown in FIG.
A detects this. Based on this detection signal, the drive of the feeding belt 2 is stopped by the control device.

When the delivered letter S1 is further conveyed, a gap is generated between the rear end of the delivered letter S1 and the leading end of the succeeding letter S2, as shown in FIG. Of the letter position detecting sensor 12, the detecting sensor 12B in the portion where the interval first occurs detects this. Since the position of the detection sensor 12 is predetermined, the control device calculates the interval between the letter sent out based on the position information of the detection sensors 12A and 12B. Then, the driving of the feeding belt 2 is stopped for a certain time until the predetermined letter interval is reached, and then the feeding belt 2 is driven. The letter-to-letter spacing thus dispensed can be a substantially constant value.

This embodiment is a separating device for feeding a letter downward, and the frontmost letter S1 is sucked and adsorbed by the feeding belt 2 at a position almost at the height of the loading table. However, FIG.
As shown in FIG. 2, the letters after the letter to be fed fall between the separation pad 4 and the feeding belt 2 due to the influence of gravity. For this reason, the suction force may be applied to the leading edge of a dropped letter, resulting in double feeding. Auxiliary guide 2
6 is to prevent the letter from falling. Since it is an elastic material, it deforms when a thick letter is drawn out, and no drawing error occurs.

Further, in the separation apparatus of the present invention, as described above, the width dimension of the chamber 3 is determined in correspondence with the letter of the minimum width dimension, so that the position of the separation pad 4 is also free.
Lean toward the side. For this reason, when a wide letter is separated, it is inclined toward the front side of the letter due to the influence of gravity and separated while skewed. To prevent this,
The auxiliary guide 26 may be extended in the width direction as shown in FIG. 13, or rollers 28, 29 for newly preventing the inclination in the width direction may be provided as shown in FIG.

In FIG. 14, the contact position between the rollers 28 and 29 is the same as the position of the suction surface A of the feeding belt 2. Further, the roller 29 on the separation pad side is attached to the shaft 30 by the arm 31, retracts when a thick letter is drawn out, and is pushed against the roller 28 by the restoring force of the rotary spring 32 after being drawn out. The roller 28 is rotatably attached to the fixed shaft 33.

By the way, as shown in FIGS. 3 and 4 of this embodiment, when the feeding belt 2 and the separating pad 4 are nested to each other to a large extent, the leading end of the letter to be fed is turned up and damaged. There is. The damage due to the flipping is caused by the resistance of the separation pad 4. The greatest resistance is exerted on the tip when the letter enters the part of the feeding belt and the nest of the separation pad, and at this time, the curling is most likely to occur.

In order to prevent this, a guide cover 34 made of a material having a low coefficient of friction such as a plastic sheet shown in FIG. 15 is provided at the portion of the separation pad 4 where the letter enters the nested portion. . The guide cover may cover the entire upper surface of the separation pad 4 as shown in FIG. 16, but may be only the edge portion of the separation pad 4.

Further, the curling of the letter may occur not only when entering the nest portion but also after entering. In order to prevent this, as shown in FIGS. 17 and 18, the separation pad shown in FIG. 16 has a straight edge shape in which the edge of the pad exerts a resistance force on the same portion of the letter, and the edge has a curved shape as shown in FIGS. Alternatively, it can be prevented by forming the pad shape which is a straight line having an inclination so that the resistance force does not act on the same portion of the letter end.

In this embodiment, the lever-shaped projection lever is used as the projection means, but this may be another means such as a push-type rod-shaped means.

Further, in the present embodiment, an example in which the feed belt and the fork are used as the means for feeding the letters on the loading table is shown, but these are screw-shaped feed means or plate-shaped feed means. It may be a means. Further, although the separation pad is used as a means for exerting a resistance force on the letter following the fed letter, this may be another means such as a rubber roller, as a matter of course.

Further, although the present invention has been described by taking the separating device in which the letters are drawn out in the gravity direction as an example, it goes without saying that this may be a separating device in which the letters are drawn out in the horizontal direction.

[0049]

EFFECTS OF THE INVENTION According to the present invention, a gap can be easily generated between the sheets on the stacking table, and double feeding at the time of separation can be reduced.

[Brief description of drawings]

FIG. 1 is a view schematically showing a letter separation apparatus as one embodiment of a paper sheet separation apparatus.

FIG. 2 is another explanatory view of the apparatus shown in FIG.

FIG. 3 is an internal configuration diagram of a chamber in the present embodiment.

FIG. 4 is a diagram showing the positions of a feeding belt and a separation pad in this embodiment.

FIG. 5 is a diagram showing the positions of a feeding belt and a separation pad in this embodiment.

FIG. 6 is an explanatory view showing a deformed state of a letter at the time of separation.

FIG. 7 is a diagram showing a state in which letters are not aligned on the stacking table.

FIG. 8 is an explanatory diagram when a thick letter is separated.

FIG. 9 is a diagram showing a state of a leading end portion of a letter at the time of separation.

FIG. 10 is a diagram for explaining how the paper sheet separating apparatus of the present embodiment is fed out.

FIG. 11 is a diagram for explaining the feeding state of the paper sheet separating apparatus according to the present embodiment.

FIG. 12 is a view showing a state of a leading end portion of a letter when there is no auxiliary guide.

FIG. 13 is a view showing another embodiment of the auxiliary guide.

FIG. 14 is a view showing another embodiment of the auxiliary guide.

FIG. 15 is a view showing another example of the separation pad.

FIG. 16 is a view showing another example of the separation pad.

FIG. 17 is a view showing another example of the separation pad.

FIG. 18 is a view showing another example of the separation pad.

[Explanation of symbols]

1. Loading table, 2. Feeding belt, 3. Chamber, 4.
Separation pad, 5 ... Blow-off nozzle, 6 ... Detection lever, 7
... projecting lever, 8 ... feed belt, 9 ... fork, 10 ...
Upper guide, 11 ... Detection lever sensor, 12 ... Letter position detection sensor, 13 ... Frame, 25 ... Guide, 26 ... Auxiliary guide

Claims (4)

[Claims] 1. A stacking means for stacking a bundle of paper sheets, a feeding means for sequentially feeding a paper sheet on the stacking means, and a bundle of paper sheets on the stacking means. A feeding means for feeding in the direction of the feeding means, and a negative pressure inside the suction means for sucking the paper sheets on the stacking means in the direction of the feeding means and adsorbing the paper sheets to the feeding means. And a resistance means for preventing a paper sheet adjacent to the paper sheet to be drawn out at the same time when the paper sheet is adsorbed by the drawing means and drawn out, and a paper sheet on the stacking means. In a paper sheet separating apparatus having a detecting means for detecting that the paper has been adsorbed to the feeding means, and a blowing means for blowing pressurized air to a letter near the frontmost portion of the paper sheets on the stacking means, Means and paid out A paper sheet separating apparatus, characterized in that it has projecting means that protrudes from the contact surface with which the paper sheet to be contacted contacts the stacking means, and that is retracted from the contact surface when a force above a certain value is applied. . 2. A stacking means for stacking a bundle of paper sheets, a feeding means for sequentially feeding the paper sheets on the stacking means, and a bundle of paper sheets on the stacking means. A feeding means for feeding in the direction of the feeding means, and a negative pressure inside the suction means for sucking the paper sheets on the stacking means in the direction of the feeding means and adsorbing the paper sheets to the feeding means. And a resistance means for preventing a paper sheet adjacent to the paper sheet to be drawn out at the same time when the paper sheet is adsorbed by the paper feeding means and drawn out, and a paper sheet on the stacking means. A sheet separating device having a detection means for detecting that the sheet is adsorbed to the feeding means, the sheet separating device is projected from the contact surface where the feeding means and the fed sheets are in contact with each other, and the force is applied. Then the contact surface Further, it has a projection means attached so as to retract further, and a blowing nozzle means for blowing pressurized air from the back side to a letter near the frontmost part of the paper sheets on the stacking table is provided with the height of the uppermost hole of the chamber. A paper sheet separating apparatus provided between the heights of the protrusion means. 3. The paper sheet separating apparatus according to claim 1 or 2, wherein the projection means is arranged at a position displaced from the center of the paper sheet in the width direction. apparatus. 4. The paper sheet separating apparatus according to claim 1 or 2, wherein the resistance means has an inlet portion of the resistance means covered with a low friction material.