JP2001302008A - Paper sheet separating and feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To feed paper sheets desirably in separated relation without generating a skew and the like of the paper sheets. SOLUTION: A paper sheet separating and feeding device comprises a first and a second delivery roller 1A and 1B interspaced perpendicularly to the delivery direction of paper sheets P, a first and a second feed roller 2A and 2B interspaced perpendicularly to the delivery direction of the paper sheets P to feed out the paper sheets P delivered by the first and second delivery rollers 1A and 1B, a first and a second separation roller 3A and 3B rotatable to follow the rotation of the first and second feed rollers 2A and 2B and for separating the paper sheets P when supplied with the application of rotational torque in the opposite direction to the feed direction, and a control means 21 for varying the rotational torque applied to the first and second separation rollers 3A and 3B to correct a skew of the paper sheets.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet separating and conveying apparatus for separating and conveying sheets one by one from stacked sheets.

[0002]

2. Description of the Related Art This type of separating and conveying apparatus includes first and second feeding rollers disposed at predetermined intervals in a direction perpendicular to a feeding direction of paper sheets. And the upper surface of the laminated sheet is brought into contact with the second feeding roller, and the first and second feeding rollers are rotated from this state to feed the sheet, and the sheet is fed to the feed roller and the separation roller. There is a separation unit composed of a plurality of sheets which is separated and sent one by one.

[0003] The laminated sheets are placed on a backup plate, and are pressed against the first and second feeding rollers by raising the backup plate.

By the way, when a large number of paper sheets, such as banknotes, each having a different thickness for each part, such as banknotes, are stacked, the thick part becomes thicker than the thin part. .

For this reason, when the above-mentioned laminated paper sheets are pressed against the first and second feeding rollers by raising the backup plate, the pressing forces applied to the first and second feeding rollers have different forces. .

For example, when a large pressing force is applied to the first feeding roller, the conveying force of the sheet by the first feeding roller becomes larger than the conveying force of the second feeding roller, and the skew of the sheet is increased. appear.

[0007]

However, in the related art, even if the skew occurs in the paper sheet as described above, the paper sheet is separated and conveyed without correction, and is sent out. And cause a transport failure.

[0008] The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a separating and conveying device for paper sheets that can be satisfactorily conveyed without causing skew or the like in the paper sheets.

[0009]

According to the present invention, in order to solve the above-mentioned problems, the invention according to claim 1 is to contact a paper sheet to be polymerized and to feed out the paper sheet. The first is disposed at a predetermined interval in a direction orthogonal to the direction.
And a second feed roller, and feeds the paper sheets fed by the first and second feed rollers, and is disposed at a predetermined interval in a direction orthogonal to the feed direction of the paper sheets. A first and a second feed roller, which are in contact with the first and the second feed rollers, are rotatable with the rotation of the first and the second feed rollers, and rotate in a direction opposite to the feed direction. First and second separating rollers to which the sheet is separated by applying a torque, and skew of the sheet by variably controlling the rotational torque applied to the first and second separating rollers. Control means for correcting.

According to a fifth aspect of the present invention, there is provided an apparatus which comes in contact with a sheet to be polymerized and feeds out the sheet. A first and a second feeding roller, and paper sheets fed by the first and second feeding rollers. The first and second feeding rollers feed the sheets at predetermined intervals in a direction orthogonal to the feeding direction of the sheets. First and second feed rollers disposed in contact with the first and second feed rollers;
First and second separation rollers capable of rotating with the rotation of the feed roller and applying a rotational torque in a direction opposite to the feed direction to separate the paper sheets; and the first and second feed rollers. A control unit that variably controls a contact pressure between a roller and the first and second separation rollers to correct a skew of the paper sheet.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

FIG. 1 is a perspective view schematically showing a paper sheet separating and conveying apparatus according to an embodiment of the present invention.

In FIG. 1, reference numerals 1A and 1B denote first and second feeding rollers which come into contact with the upper surface side of the stacked sheets and feed the sheets P by rotating. The first and second feeding rollers 1A and 1B are arranged at predetermined intervals in a direction orthogonal to the feeding direction of the paper sheet P. First and second
Are driven by a drive motor 7 for feeding. The laminated sheets are placed on a backup plate (not shown), and are pressed against the first and second feeding rollers 1A and 1B with a predetermined pressure by raising the backup plate.

In the feeding direction of the paper sheet P, first and second feed rollers 2A and 2B for conveying the paper sheet are provided. Below the first and second feed rollers 2A and 2B, first and second separation rollers 3A and 3B for separating sheets P one by one are pressed. The first and second feed rollers 2A and 2B are each provided with a drive motor 5 for feeding.
A and 5B are driven to rotate. First
The second separation rollers 3A and 3B are driven to rotate by separation drive motors 6A and 6B to separate sheets one by one as described later.

The drive motors 5A and 5B for feeding are mounted on the rotating ends of the mounting brackets 9A and 9B, and the base ends of the mounting brackets 9A and 9B are rotatably supported by support shafts 10A and 10B. . One ends of the coil springs 12A, 12B are connected to base ends of the mounting brackets 9A, 9B. The other ends of the coil springs 12A and 12B are connected to rotating gears 14A and 14A via rotating levers 13A and 13B.
14B. Drive motors 16A and 16B that rotate forward and backward are connected to the rotating gears 14A and 14B via worm gears 15A and 15B.

The first and second feed rollers 2A, 2A
First and second sensors 18A and 18B as measuring means for measuring the skew of the conveyed paper sheet P are provided in the direction in which B is carried out.

Further, the first and second sensors 18A, 18A
A pair of first and second pull-out rollers (not shown) for pulling out and transporting the paper P sent out by the first and second feed rollers 2A and 2B on the downstream side in the sheet transport direction of 8B. Are arranged.

FIG. 2 is a block diagram showing a drive control system of the separation and transport device.

The first and second sensors 18A, 18B are connected to the control means 21 via signal paths. The control means 21 is connected to the drive motor 7 for the feeding roller, the drive motors 5A and 5B for the feed roller, and the drive motors 16A and 16B for skew correction via a control circuit.

The control means 21 includes a first sensor 18 and a second sensor 18.
The rotational torques of the separation drive motors 6A and 6B are variably controlled based on the skew measurement values of the sheets sent from A and 18B.

When the control means 21 receives the detection signals from the first and second sensors 18A and 18B, the control means 21 stops the driving of the feed drive motor 7 and sets the first and second feed rollers 1A. , 1B is stopped.

FIG. 3 shows the rotation of the feed rollers 2A and 2B and the separation rollers 3A and 3B.

The feed rollers 2A and 2B are rotated in the direction of arrow A by the first torque supplied from the feed drive motors 5A and 5B. The separation rollers 3A and 3B are rotated in the direction of arrow B by a second torque smaller than the first torque by drive motors 6A and 6B for separation. However, the separation rollers 3A and 3B are
In the state of contact with 2B, the rotation is made in the direction of arrow C, which is the direction opposite to the direction shown by arrow B, due to the difference between the second torque and the first torque.

In this state, as shown in FIG. 4, one sheet P is fed by feed rollers 2A and 2B and separation rollers 3A and 3B.
Is transported by the transport force provided from the feed rollers 2A and 2B. At this time, the separation rollers 3A and 3B are rotated in the direction in which the rotation of the shaft is reversed (the direction of arrow C), as described above, by the rubbing force between the separation rollers 3A and 3B.

As shown in FIGS. 5 and 6, a plurality of paper sheets P1 and P2 are overlapped with the feed roller 2.
A, 2B and the separation rollers 3A, 3B, the frictional force between the sheets P1, P2 and the sheet P
Slippage occurs between the sheets P1 and P2 due to the difference in frictional force between the rollers P1 and P2 and each roller. As a result, the separation rollers 3A and 3B are rotated in the direction (arrow B direction) rotated by the separation drive motors 6A and 6B or in the arrow A direction that is the rotation direction of the feed rollers 2A and 2B. However, the speed is reduced, or the rotation is temporarily stopped due to speed balance (balance).

That is, as shown in FIG.
A and 2B are in contact with the paper sheets P1.
B is conveyed toward the downstream side in the rotating direction, and the remaining paper sheets P2 are temporarily pushed back by the separation rollers 3A and 3B, or temporarily slipped at that position by the paper sheets P2. Stopped.

Thereafter, as shown in FIG. 7, when the sheet P1 in contact with the feed rollers 2A and 2B is sent out and the lower sheet P2 comes into contact with the feed rollers 2A and 2B,
The separation rollers 3A, 3B are again rotated in the direction of arrow C with the rotation of the feed rollers 2A, 2B.

In other words, the separation rollers 3A and 3B have
The feed rollers 2A are driven by the separation drive motors 6A and 6B.
The rotation direction at the position in contact with the outer circumference of the feed roller 2
Since a torque in a direction opposite to the direction A, 2B is given, the separation drive motor is used only when two or more sheets are guided in the gap between the feed rollers 2A, 2B. 6A, 6B, or
Alternatively, the rotation is stopped, or the speed at which the rollers are rotated in the opposite directions by the feed rollers 2A and 2B is reduced.
A plurality of sheets are separated one by one.

FIG. 8 shows the relationship between the pinch pressure defined between the separation rollers 3A and 3B and the feed rollers 2A and 2B and the torque applied to the separation rollers 3A and 3B (reverse torque applied in the direction of arrow D). It is a graph which shows a relationship.

That is, considering the range of variation of the friction coefficient μ1 defined between the sheets and the range of variation of the friction coefficient μ2 defined between the sheet and the roller, the friction coefficient μ1
Is a separable region that satisfies the condition sandwiched by the maximum value of the friction coefficient μ2 and the minimum value of the friction coefficient μ2.

Next, the operation of separating and conveying the sheets will be described.

FIG. 9 shows a state in which the stacked sheets are pressed against the first and second feeding rollers 1A and 1B with the same force by raising the backup plate (not shown).

In this case, the first and second feeding rollers 1
When A and 1B rotate in the direction of the arrow G, the sheet P is fed out in the direction of the arrow D. The paper sheets P are put between the first and second feed rollers 2A and 2B and the separation rollers 3A and 3B, are separated one by one as described above, and are shown in a normal state without skew. Not sent to the transport path.

FIG. 10 shows the operation when the stacked sheets are pressed against the first and second feeding rollers 1A and 1B with different pressures due to the local thickness difference due to the rise of the backup plate. is there.

That is, a case is shown in which the pressing force of the stacked sheets against the second feeding roller 1B is larger than the pressing force against the first feeding roller 1A.

In this case, the feeding force of the second feeding roller 1B becomes larger than the feeding force of the first feeding roller 1A, and the first and second feed rollers 2A and 2B and the separation rollers 3A and 3B are separated. The side of the sheet passing through the second feed roller 2B precedes the sheet passing therethrough, and the second detection sensor 18B detects the leading end of the sheet before the first detection sensor 18A. When this detection is made, the control means 2
Reference numeral 1 indicates that the sheet is skewed in a state where the leading end on the side fed by the second feed roller 2B is ahead as shown in FIG. 11, and the rotational torque applied to the first separation roller 3A is determined. It is removed from the separable area in the direction approaching the origin in FIG.

As a result, the sheet P to be separated is sent out such that the side fed by the first feed roller 2A precedes the sheet P to be separated, since the force of stopping the feed direction by the first separation roller 3A is reduced. The skew is made in the F direction as shown in FIG.

Therefore, the skew in the E direction shown in FIG. 11 is canceled by the skew in the F direction shown in FIG. 12, and the skew is corrected as shown in FIG. 13 and in the normal state as shown in FIG. Conveyed.

Further, the stacked paper sheets pushed up by the backup plate are opposite to the above in the second feeding roller 1.
When it is more strongly pressed against the first feeding roller 1A than B, it is determined that the leading end on the side fed by the first feed roller 2A is skewed in a state in which it is ahead,
The rotational torque applied by the second separation roller 3B is removed from the separable area in a direction approaching the origin in FIG.

As a result, the force of the second separation roller 3B in the feeding direction is reduced, so that the separated sheets P are sent out such that the side fed by the second feeding roller 2B precedes and the skew is reduced. Corrected and transported in a normal state.

In the above-described embodiment, the skew of paper sheets is corrected by variably controlling the rotation torque applied to the first or second separation roller 3A, 3B.
Without being limited to this, the first or second feed rollers 2A, 2A, with respect to the first or second separation rollers 3A, 3B.
The skew may be corrected by variably controlling the contact pressure of 2B.

That is, for example, as shown in FIG.
When the pressing force of the stacked sheets on the feeding roller 1B is larger than the pressing force on the first feeding roller 1A,
As described above, the feeding force of the second feeding roller 1B becomes larger than the feeding force of the first feeding roller 1A, and the distance between the first and second feed rollers 2A and 2B and the separation rollers 3A and 3B is increased. The side of the paper sheet passing by the second feed roller 2B precedes, and the second detection sensor 1
8B detects the leading end of the sheet before the first detection sensor 18A. When this detection is made, the control means 21
As shown in FIG. 1, it is determined that the sheet is skewed in a state where the leading end on the side fed by the second feed roller 2B is ahead, and the phase of the drive motor 16A is controlled to perform the first separation. First feed roller 2 with respect to roller 3A
The contact pressure of A is removed from the separable area in a direction approaching the origin in FIG.

As a result, the sheet P to be separated is sent out such that the side fed by the first feed roller 2A precedes the sheet P to be separated. The skew is made in the F direction as shown in FIG.

Therefore, the skew in the direction E shown in FIG. 11 is canceled by the skew in the direction F shown in FIG. 12, and the skew is corrected as shown in FIG. Conveyed.

On the contrary, when the stacked sheets pushed up by the backup are pressed more strongly against the first feed roller 1A than the second feed roller 1B, the first feed roller 2A causes It is determined that the leading end portion on the side to be fed is skewed ahead, and by controlling the phase of the drive motor 16B, the contact pressure of the second feed roller 2B with respect to the second separation roller 3B is determined. 8
Remove from the separable area in the direction approaching the origin.

As a result, the force in the feeding direction by the second separation roller 3B is reduced, so that the separated sheets P are sent out such that the side fed by the second feeding roller 2B comes first, and the skew is reduced. Corrected and transported in a normal state.

The skew correction drive motor 16A
When the phase of (16B) is controlled, the worm gear 15A
(15B), the rotating lever 13A (13B) rotates in the direction of the arrow via the rotating gear 14A (14B) to weaken the urging force of the coil spring 12A (12B), and the separation roller of the feed roller 5A (5B) The pressing force on 6A (6B) is reduced. Due to the decrease in the pressing force, the conveyance resistance of the paper sheet at the feed roller 5A (5B) and the separation roller 6A (6B) is reduced, and the skew of the paper sheet is corrected.

Since the skew of paper sheets tends to occur continuously in the same direction, the skew sensor 18
A skew tendency is calculated from a plurality of measured values obtained by A and 18B, and based on the calculated values, the conveyance reverse torque of each of the separation rollers 3A and 3B, and the respective separation rollers 3A and 3B and the feed rollers 2A and 2B. A method of controlling the contact pressure of the contact is also conceivable.

Furthermore, in the above-described embodiment, the feed rollers 2A and 2B are movable and are pressed against the separation rollers 3A and 3B. However, the present invention is not limited to this, and the separation rollers 3A and 3B are movable. And feed rollers 2A and 2B
It is good also as composition which is press-fitted.

In addition, it goes without saying that the present invention can be variously modified within the scope of the gist.

[0051]

As described above in detail, according to the present invention, even if the paper sheets to be polymerized have different pressing forces against the first and second feeding rollers due to the local difference in thickness, the paper sheets are superposed. Skew can be corrected, and the sheet can be separated and sent out in a normal state.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a paper sheet separating and conveying apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a drive control system of the sheet separating and conveying device.

FIG. 3 is a diagram illustrating a rotation operation of a feed roller and a separation roller.

FIG. 4 is a diagram illustrating a state in which one sheet is fed between a feed roller and a separation roller.

FIG. 5 is a diagram showing a state in which paper sheets are superimposed and fed between a feed roller and a separation roller.

FIG. 6 is a diagram illustrating an operation of separating polymerized paper sheets sent between a feed roller and a separation roller.

FIG. 7 shows a state where polymerized paper sheets are separated.

FIG. 8 is a graph showing a separable area of a paper sheet.

FIG. 9 is a perspective view illustrating a state in which the stacked sheets are pressed against the first and second feeding rollers with the same pressing force and are sent out.

FIG. 10 is a perspective view showing a state in which the stacked sheets are pressed against the first and second feeding rollers with different pressing forces and sent out.

FIG. 11 is a diagram showing a state in which the fed sheets are skewed in the direction of arrow E;

FIG. 12 is a diagram illustrating a state in which the rotational torque applied to the first separation roller is out of the separable area, and the fed sheets are skewed in the direction of arrow F to cancel and correct the skew.

FIG. 13 is a diagram illustrating a state in which a skew-corrected sheet is fed out.

FIG. 14 is a diagram illustrating a state in which a skew-corrected sheet is further fed.

[Explanation of symbols]

 1A 1st feeding roller 1B 2nd feeding roller 2A 1st feed roller 2B 2nd feed roller 3A 1st separation roller 3B 2nd separation roller P ... paper sheets A ... feed Roller torque B: Torque of first and second separation rollers

Continued on the front page (72) Inventor Yukio Asari 70 Yanagimachi, Yukicho, Kawasaki-shi, Kanagawa Prefecture F-term (reference) 3F102 AB01 BA02 BB02 BB07 CA04 CB06 EA03 FA02 3F343 FA02 FB00 FC11 GA01 GB01 GC01 GD01 JA14 JA18 JD09 JD33 JD40 LC06 LC07 LC21 MA03 MA15 MA57 MB04 MB13 MB14 MC09 MC11 MC12

Claims (8)

[Claims] 1. A first and second paper sheet which comes in contact with a paper sheet to be polymerized and is fed out at a predetermined interval in a direction orthogonal to a feeding direction of the paper sheet. And the first and second feeding rollers for feeding the paper sheets fed out by the first and second feeding rollers. The first feeding roller is disposed at a predetermined interval in a direction orthogonal to the feeding direction of the paper sheets. And a second feed roller, which is in contact with the first and second feed rollers, is rotatable with the rotation of the first and second feed rollers, and applies a rotational torque in a direction opposite to the feed direction. A first and a second separation roller for separating the sheets and a control for correcting a skew of the sheets by variably controlling a rotation torque applied to the first and the second separation rollers. Means for separating and transporting paper sheets Feeder. 2. The control device according to claim 1, wherein the rotation torque applied to one of the first and second separation rollers is set to a first torque capable of separating paper sheets, and the rotation torque applied to the other is set to the first torque. 2. The sheet separating and conveying apparatus according to claim 1, wherein the skew of the sheet is corrected by variably controlling the second torque to be smaller than the first torque. 3. A measuring device for measuring a skew of a sheet fed from the first and second feed rollers, wherein the control device controls the first and second skews according to the skew measured by the measuring device. 2. The paper sheet separating and conveying apparatus according to claim 1, wherein the rotation torque applied to the separation roller is variably controlled. 4. The measuring means measures the skew of a plurality of paper sheets, calculates the tendency of the skew of the paper sheets from the plurality of measured values, and the control means calculates the skew tendency based on the calculated value. 4. The paper sheet separating and conveying apparatus according to claim 3, wherein the rotation torque applied to the first and second separation rollers is variably controlled. 5. A first and second paper sheet which comes in contact with a paper sheet to be polymerized and is fed out at a predetermined interval in a direction orthogonal to a feeding direction of the paper sheet. And the first and second feeding rollers for feeding the paper sheets fed by the first and second feeding rollers. The first paper sheet is disposed at a predetermined interval in a direction orthogonal to the feeding direction of the paper sheets. And a second feed roller, which is in contact with the first and second feed rollers, is rotatable with the rotation of the first and second feed rollers, and applies a rotational torque in a direction opposite to the feed direction. A first and a second separation roller for separating the paper sheets and a contact pressure between the first and the second feed rollers and the first and the second separation rollers; Control means for correcting the skew of the leaves. Paper sheet separation and transport device. 6. The control means according to claim 1, wherein the contact pressure of one of the first and second feed rollers with respect to the first or second separation roller is a first pressure which enables separation of paper sheets. 6. The sheet according to claim 5, wherein the skew of the sheet is corrected by variably controlling the contact pressure of the other feed roller to a second pressure smaller than the first value. Separation transfer device. 7. Measuring means for measuring a skew of the sheet fed from the first and second feed rollers, wherein the control means controls the first and second skews according to the skew measured by the measuring means. And second for the separation roller of
6. The paper sheet separating and conveying apparatus according to claim 5, wherein the contact pressure of the feed roller is variably controlled. 8. The measuring unit measures the skew of a plurality of sheets, calculates the tendency of the skew of the sheets from the plurality of measured values, and the control unit determines the first skew based on the calculated value. 8. The paper sheet separation and conveyance device according to claim 7, wherein the contact pressure of the first and second feed rollers with respect to the second and separation rollers is variably controlled.