JP2001146334A - Paper sheet processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper sheet processing device having the relatively low-cost constitution of parts and also having the high ability to separate overlapped paper sheets. SOLUTION: This paper sheet processing device is provided with a lower carrying belt C and a driven roller 3 for carrying the paper sheets while pinching the paper sheets between them, a spring 12 for energizing the driven roller 13 toward the lower carrying belt C with the predetermined force, a pair of separating rollers A, B arranged in the downstream of the lower carrying belt C and the driven roller 3 with a space (d) larger than the thickness of one paper sheet and smaller than the thickness of two paper sheets and arranged so that the upper separating roller B can be moved in a direction for separating from the lower separating roller A when carrying the paper sheets, a spring 15c for energizing the separating roller B in a direction for coming close to the separating roller A with the predetermined force, and driving motors 9, 19 for rotating the separating rollers A, B in the same direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet processing apparatus for processing sheets.

[0002]

2. Description of the Related Art Conventionally, a sheet processing apparatus has been used for sorting sheets or printing on sheets. The sheet processing apparatus conveys a sheet to a predetermined reading position, reads information such as characters written on the surface of the sheet, and sorts the sheet based on the read information. In the process of sorting, for example, it is possible to detect a predetermined printing reference position on a sheet and to perform a printing process on the surface of the sheet.

[0003] Incidentally, such a paper sheet processing apparatus not only suppresses the occurrence of jams (paper sheet jams) during the transportation of the paper sheets, but also sorts or prints the paper sheets. A sheet separating mechanism for separating the stacked sheets is generally provided so as to surely perform the operation one by one.

As shown in FIG. 7, a conventional paper sheet separating mechanism is constituted by a pair of upper and lower separation belts 53 and 54 which are driven by separate driving devices 51 and 52 and have different feeding speeds. This is a mechanism for transporting the sheet while holding it. That is, the separation mechanism is provided with the separation belt 5.
The difference between the feeding speeds of the separation belt 3 and the separation belt 54 causes a speed difference in the conveyance of individual sheets.
Therefore, in a state where the sheets overlap, the separation belt 5
Even when the sheets are taken in by the sheets 3 and 54, the sheets on the upper side and the sheets on the lower side are conveyed while being displaced from each other, and the overlapping sheets are separated. .

[0005]

However, the sheet separating mechanism provided in such a conventional sheet processing apparatus has the following problems. That is, since the conventional separation mechanism is a mechanism having a relatively low separation ability for separating paper sheets by simply making a difference between the individual feed speeds of the separation belts 53 and 54 facing each other, the temperature is low. ,
It is easily affected by changes in the environment such as humidity, that is, changes in the coefficient of friction of the surface of the belt formed of rubber or the like, and there is a problem in the ability to separate paper sheets. Therefore, in the conventional sheet processing apparatus, jams and the like are apt to occur, and the sheets are often damaged, and when a jam or the like occurs, the operation of the apparatus must be temporarily stopped. Since it cannot be obtained, the processing speed of paper sheets has been reduced.

In the conventional separating mechanism, a pair of drive belts 53 and 54 are provided so that the sheets can be conveyed while being nipped.
Is provided at a position where the outer peripheral surfaces come into contact with each other. When the apparatus is in operation, the outer peripheral surfaces of the drive belts 53 and 54 slide, and the belt surface is quickly worn. Therefore, use a high-performance motor for driving a worn belt with a large load during driving, or an expensive belt with excellent wear resistance to minimize the generation of abnormal noise when the worn belt slides. Since the separation mechanism needs to be configured, the cost of parts constituting the separation mechanism is limited.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problem, and comprises a paper sheet separating mechanism having a relatively inexpensive component structure and a high separating ability for separating stacked paper sheets. Thus, an object of the present invention is to provide a sheet processing apparatus capable of improving the processing efficiency of sheets.

[0008]

In order to achieve the above object, a paper sheet processing apparatus according to the present invention, as set forth in claim 1, comprises: Conveying means comprising a pair of driven rollers, a conveying body driving means for driving the conveying body, a first urging means for urging at least one of the conveying body or the driven roller toward the other with a predetermined force, The sheet is disposed downstream of the conveying means, and is disposed at an interval larger than the thickness of substantially one sheet and smaller than the thickness of substantially two sheets when the sheet is not conveyed, If the number of sheets is two or less at the time of conveyance, at least one of the pair of separation rollers movable in a direction in which at least one of them is separated from the other when the interval is almost three or more, and at least one of the pair of separation rollers In the direction to approach the other separation roller Characterized by comprising a second biasing means for biasing at a constant force, and a separation roller driving means for rotationally driving the pair of separating rollers in the same direction.

In the paper sheet processing apparatus according to the present invention, an urging force is applied to at least one of, for example, a pair of separation rollers that contact the surface of the paper sheet, and at least one of a pair of driven rollers or a conveying body. In addition, the pair of separation rollers can be driven to rotate in the same direction, so that one separation roller can surely reversely convey a sheet contacting the outer peripheral surface of the roller to the upstream side, and further, the other separation roller. However, the paper sheets in contact with the outer peripheral surface of the roller can be reliably transported to the downstream side, whereby the stacked paper sheets can be reliably separated one by one.

Further, in the paper sheet processing apparatus of the present invention, when the separated paper sheets are reversely conveyed to the upstream side, the separation is driven so that the paper sheets are reversely conveyed to the upstream side. By the cooperation of the roller and the driven roller, reverse conveyance of the paper sheet toward the upstream side can be performed without delay.

Therefore, according to the paper sheet processing apparatus of the present invention, the occurrence of jams and the like during transportation of paper sheets is suppressed, so that damage to paper sheets is reduced, and The need to stop the operation of the equipment is also reduced,
The processing efficiency of paper sheets can be improved.

Further, the paper sheet processing apparatus of the present invention, as described in claim 2, comprises a transport means comprising a pair of a transport body C and a driven roller for transporting the paper sheet while nipping the paper sheet,
Transporting means for driving the transporting means, first biasing means for biasing the driven roller toward the transporting body C with a predetermined force, and a sheet disposed downstream of the transporting means; When the sheet is not conveyed, the sheets are arranged at intervals larger than the thickness of substantially one sheet and smaller than the thickness of substantially two sheets, and at least one of the separation roller B or the separation roller A is separated from the other separation roller. A pair of separation rollers A, B movable in the direction of separation, and the separation roller B or the separation roller A;
A second urging means for urging at least one of them with a predetermined force in a direction approaching the other separation roller; and a separation roller driving means for rotating the pair of separation rollers A and B in the same direction. It is characterized by having.

Further, according to a third aspect of the present invention, there is provided a sheet processing apparatus according to the second aspect, wherein the separation roller B or the separation roller A is added to the separation roller A. The force is P ₁ , the urging force applied to the driven roller is P ₂ , and the friction coefficient between the separation roller A and the sheet is μr.
a, the friction coefficient between the separation roller B and the paper sheet is μrb, the friction coefficient between the transport body C and the paper sheet is μrc, the friction coefficient between the paper sheets is μp, between the separation rollers A and B, or The mass of one sheet of paper C between the conveyance body C and the driven roller, the gravitational acceleration g, the separation roller A and the conveyance body C when one sheet of paper is conveyed. The load ratio of the sheet to the separation roller A is e (0 ≦ e ≦ 1), and the conveyance body C between the separation roller A and the conveyance body C when one sheet is conveyed. The load ratio of the paper sheet to the separation roller is h (0 ≦ h ≦ 1, 0 ≦ e + h ≦ 1), and the separation roller in the separation roller A and the separation roller B when one sheet is conveyed. The contact load ratio of the paper sheet to the surface B is n (0 ≦ n ≦ 1), and the uppermost paper sheet and the uppermost paper sheet when the paper sheets are conveyed in an overlapping manner. The load ratio of the lower sheet to the lower sheet is k (0 ≦ k ≦ 1), and the inclination angle of the conveying path of the sheet by the conveying unit and the pair of separation rollers with respect to the horizontal direction is defined as: theta, when paper sheets separated by the pair of separation rollers, f ₁ the conveying force obtained from the downstream side, where the conveying force paper sheets obtained from the upstream side of the conveying means f _2, and,

(Equation 2) Is satisfied.

According to the sheet processing apparatus of the second or third aspect of the present invention, by determining the separation condition of the overlapped sheets, an appropriate biasing force for separating the sheets is determined. Since it can be applied to the roller A or the driven roller, it is possible to increase the separating ability of the paper sheet, and it is possible to improve the processing efficiency of the paper sheet.

According to a fourth aspect of the present invention, there is provided the sheet processing apparatus according to the first or second aspect, wherein the transport unit includes the transport unit and the transport unit. The driven roller is provided at a position where the outer peripheral surfaces thereof are in contact with each other, or at an interval smaller than the thickness of substantially one sheet of paper.

According to the paper sheet processing apparatus of the present invention, when the conveyance body and the driven roller are provided with an interval smaller than the thickness of substantially one sheet of paper, the conveyance body and the driven roller are separated. The sheets can be conveyed to the downstream side while sandwiching them, and even when the apparatus is operating and the sheets are not directly conveyed, the opposing surfaces do not slide. Since there is no fear that the surface will be worn, the necessity of manufacturing the carrier and the driven roller with an expensive material having excellent abrasion resistance is reduced. A separation mechanism can be configured.

According to a fifth aspect of the present invention, there is provided the sheet processing apparatus according to the first or second aspect, wherein the pair of separation rollers includes three or more sheets. Paper sheets can be interposed.

According to the sheet processing apparatus of the present invention, even when, for example, three or more sheets are conveyed in an overlapped manner, the overlapped sheets are not generated without the occurrence of a jam or the like. It becomes possible to separate them one by one.

According to a sixth aspect of the present invention, there is provided the sheet processing apparatus according to the first or second aspect, wherein the transport body is in contact with an outer peripheral surface. There is a first conveyor belt that is rotationally driven so that the paper sheet to be conveyed is conveyed to the downstream side. A second transport belt that is provided at a position facing each other with a predetermined interval therebetween and that is driven so that sheets contacting the outer peripheral surface are transported downstream; and the first transport belt and the second transport belt. Drive control means for changing the drive of each belt so that the moving speed of each outer peripheral surface with respect to the second transport belt is relatively different.

The paper sheet processing apparatus according to the present invention is configured such that when the paper sheets conveyed to a pair of separation rollers on the downstream side are overlapped, the conveyance speed of the paper sheets contacting the outer peripheral surface of each belt. Therefore, the overlapped paper sheets can be slightly shifted and supplied to the separation roller or the like. Further, according to the present invention, the opposing transport belts are provided at predetermined intervals, and even when the apparatus is in operation, the opposing surfaces do not slide with each other and the surfaces are worn. Since there is no fear, the necessity of using a transport belt of an expensive material having excellent abrasion resistance is reduced, and the sheet separating mechanism in the sheet processing apparatus can be configured with relatively inexpensive parts.

According to a seventh aspect of the present invention, there is provided a sheet processing apparatus according to the first or second aspect, wherein the pair of separation rollers transports the sheet from the upstream side. A pair of nipping and conveying rollers for nipping and conveying the paper sheets further to the downstream side, detecting means for detecting whether or not the paper sheets are taken in by the pair of nipping and conveying rollers; And control means for controlling rotation driving of the separation roller by the separation roller driving means or conveyance of paper sheets by the conveyance means based on a detection result by the means.

According to the sheet processing apparatus of the present invention, for example, while the sheet is being taken in by the nipping and conveying roller provided on the downstream side of the separating roller, for example, the conveying means or the separating roller driving means is operated. Immediately after the separation of the paper sheet by the separation roller, the paper sheet is newly transferred from the upstream side to the separation roller or the pinch conveyance by controlling the conveyance of the paper sheet to the separation roller or stopping the rotation of the separation roller. There is no danger of being conveyed to the rollers, so that the occurrence of jams and the like can be suppressed, as well as the stacked paper sheets can be reliably separated by the separation roller.

According to a second aspect of the present invention, there is provided a sheet processing apparatus according to the first or second aspect, wherein the pair of separation rollers are in contact with each other. The first separation roller is driven to rotate so that the leaves are conveyed to the downstream side, and the second separation roller is driven to rotate so that the contacting sheet is reversely conveyed to the upstream side. The moving speed of the outer peripheral surface of the second separating roller driven by the separating roller driving means is faster than the moving speed of the outer peripheral surface of the first separating roller.

According to the paper sheet processing apparatus of the present invention, the contacting paper sheet is more than the moving speed of the outer peripheral surface of the first separation roller which is rotated so that the contacting paper sheet is conveyed downstream. Since the moving speed of the outer peripheral surface of the second separation roller, which is rotationally driven to be reversely conveyed to the upstream side, is configured to be fast, the first driving roller that is driven to convey the paper sheet to the downstream side is driven. Is driven so as to reversely convey the paper sheet to the upstream side by the separation roller and the conveyance force corresponding to the conveyance means described above.
, Which can shorten the separation time, which is an improvement in the sheet paper separating ability.

Further, according to the present invention, the sheet processing apparatus of the present invention further includes a sheet conveyed from the upstream side by the pair of separation rollers and further downstream. And a moving speed of the outer peripheral surface when the nipping and conveying roller is driven is higher than a moving speed of the outer peripheral surface of the first separating roller driven by the separating roller driving unit. It is also characterized by being fast.

In the paper sheet processing apparatus of the present invention, the moving speed of the outer peripheral surface of the first separation roller that is rotationally driven so that the contacting paper sheet is conveyed downstream is lower than the moving speed of the separation roller. Is configured so that the moving speed of the outer peripheral surface of the pair of nipping and conveying rollers that takes in the paper sheet and conveys it to the downstream side is increased, so that the paper sheet at the time when the separation of the paper sheet by the separation roller is completed. The paper can be transported to the downstream side quickly, and the processing efficiency of paper sheets can be improved.

[0027]

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

FIG. 1 is a sectional view schematically showing a sheet separating mechanism provided in a sheet processing apparatus according to an embodiment of the present invention.

The paper sheet processing apparatus according to this embodiment conveys a paper sheet to a predetermined reading position, reads information such as characters written on the surface of the paper sheet, and performs processing based on the read information content. In the process of sorting, for example, a predetermined printing reference position on the sheet is detected, and a printing process is performed on the surface of the sheet. I have. By the way, as shown in FIG. 1, the above-mentioned sheet separating mechanism 1 provided in the sheet processing apparatus is capable of suppressing occurrence of a jam (clogging of sheet conveyance) during conveyance of the sheet 2. Needless to say, this is for separating the paper sheets when they are conveyed in an overlapped state so that sorting or printing processing of the paper sheets or the like is surely performed one by one.

That is, the sheet separating mechanism 1 includes a separating section 3 for separating the stacked sheets 2, a supply section 4 for supplying the sheets to the separating section 3 from the upstream side, and a separating section. And a take-in unit 5 that takes in the paper sheets separated by 3 and conveys them further downstream.

The supply unit 4 includes paper sheets 2 contacting the outer peripheral surface.
Is provided at a position facing the outer conveying surface of the upper conveying belt 6 at a predetermined distance from the upper conveying belt 6, which is rotationally driven so as to be conveyed to the downstream side, and is in contact with the outer peripheral surface. Similarly, the moving speed of the outer peripheral surface of the lower conveying belt C and the outer conveying surface of the upper conveying belt 6 is lower than the moving speed of the outer peripheral surface of the lower conveying belt C. And a pulley 10 and a pulley 10 for transmitting the driving force of the driving motor 9 via the driving force transmission belt 8 to the upper conveyance belt 6 and the lower conveyance belt C, respectively. 11
And a position on the downstream side of the upper conveyor belt 6 and in contact with a part of the outer peripheral surface of the lower conveyor belt 7 or the outer peripheral surface of the lower conveyor belt C, which is thinner than the thickness of almost one sheet 2. A roller provided at an interval and urged toward the lower conveyor belt C by an urging force generated by the spring 12, and either forward or reverse depending on the direction of the external force applied to the outer peripheral surface of the roller. And a driven roller 13 rotatable also in the direction of.

In the supply section 4, the lower conveyor belt C and the upper conveyor belt 6 which are opposed to each other are provided with a thickness interval of, for example, approximately three sheets 2 and the apparatus is operating. Even in this state, there is no danger that the surfaces facing each other will not be worn without sliding, so that the necessity of using an expensive material having excellent wear resistance as the transport belt is reduced.

When the sheets are conveyed from the upstream side in an overlapping state by the upper conveying belt 6, the lower conveying belt C, and the driven roller 13, the separating section 3 has both outer sides of the overlapping sheets. The lower separating roller A and the upper separating roller B provided so that each outer peripheral surface thereof is in contact with the surface of the lower separating roller A are transported to the downstream side by the sheets contacting the surface facing the upper separating roller B. The above-described drive motor 9 that rotates via the driving force transmission belt 8 and the pulley 16 so that the upper separation roller B is conveyed to the upstream side by the paper sheet contacting the surface facing the lower separation roller A. The driving force transmission belt 17, the driving force transmission belt 17a, the fixed pulley 18a, and the swing pulley 18 are moved so that the moving speed of the outer peripheral surface moves faster than the moving speed of the outer peripheral surface of the lower separation roller A. Via And a drive motor 19 for rotating Te.

The upper conveying belt 6, the lower conveying belt C and the driven roller 13, and the lower separating roller A and the upper separating roller B are arranged such that the conveying direction of the sheet 2 with respect to the horizontal direction is the inclination angle θ toward the downstream side. Are arranged so as to be attached.

The upper separation roller B is located at a position facing the lower separation roller A at an interval d that is thicker than the thickness of almost one sheet 2 and thinner than the thickness of almost two sheets 2. It is provided via a swing mechanism 15a. Swing mechanism 15
a is the fixed pulley 18a provided at the center position of the rocking motion, a rocking lever 15b that rocks the upper separation roller B about the fixed pulley 18a, and a rocking lever 15b.
And a spring 15c for urging the upper separation roller B toward the lower separation roller A with a predetermined urging force. When the sheets are conveyed from the upstream side in an overlapping state by the swing mechanism 15a, the upper separation roller B retreats from the lower separation roller A side while resisting the urging force of the spring 15c, and overlaps. The outer peripheral surfaces of the lower separation roller A and the upper separation roller B can be brought into contact with both outer surfaces of the paper sheet to separate the paper sheet. In addition, the movable range of the upper separation roller B is set to be relatively large so as to cope with a case where three or more sheets are conveyed while being overlapped.

Further, the separation rollers A and B are made, for example, by coating the surface of aluminum as a base material with rubber or the like, and make the separation rollers A and B smaller than the frictional force generated on the surfaces of the overlapped paper sheets. The frictional force generated between the surface of B and the surface of the paper sheet is configured to be large. Also,
The separation rollers A and B are driven to rotate in the same direction (counterclockwise in FIG. 1). Therefore, the lower separating roller 4 can convey the lower sheet among the overlapping sheets downstream, and the upper separating roller B can transfer the lower sheet among the overlapping sheets. Can be transported backward to the upstream side.

The take-in section 5 is provided on the downstream side of the lower separation roller A and the upper separation roller B, takes in the paper sheets conveyed from the upstream side, and further holds the paper sheets to the downstream side while nipping the paper sheets. The lower nipping and conveying roller 20 and the upper nipping and conveying roller 21 to be conveyed, and the driving force transmission belt 22 such that the outer peripheral surface of the lower nipping and conveying roller 20 moves faster than the outer peripheral surface of the lower separating roller A. And pulley 23
Drive motor 24 for rotating the lower nip transport roller 20 together with the driven upper nip transport roller 21 via
And the separation rollers A and B and the nipping / conveying rollers 20 and 21 are provided in a gap in the conveying direction of the papers, and a light emitting device and a light emitting device determine whether or not the papers are taken in by the nipping / conveying rollers 20 and 21. The optical sensor 25 detected by the light receiver and the conveyor belts 6 and C while “dark” is detected by the optical sensor 25, that is, while sheets are being taken in by the nipping and conveying rollers 20 and 21. And a control device (not shown) for stopping the drive of the drive motor 9 for operating the lower separation roller A.

Here, the relationship between the forces applied to the members when the stacked sheets are separated by the sheet separating mechanism 1 and the conditions for separating the sheets will be considered.

As shown in FIGS. 2 and 3, the force applied to each member is represented by P ₁ , the urging force applied to the upper separation roller B is P ₂ , the urging force applied to the driven roller 13 is P ₂ , and the lower separation roller A is The friction coefficient between the upper separation roller B and the paper sheet is μrb, the friction coefficient between the lower conveyor belt C and the paper sheet is μrc, the friction coefficient between the paper sheets is μp, and the separation roller is μr. Between A and B or lower conveyor belt C, driven roller 1
M is the mass of one sheet of paper between the three, gravitational acceleration is g,
When one sheet is conveyed, the load ratio of the sheet to the lower separation roller A in the lower separation roller A and the lower conveyance belt C is e (0 ≦ e ≦ 1), and one sheet The load ratio of the paper sheet to the lower transport belt C between the lower separation roller A and the lower transport belt C when the leaves are transported is h (0 ≦ h ≦ 1, and 0 ≦ e + h ≦ 1). The contact load ratio of the sheet to the surface of the upper separation roller B between the lower separation roller A and the upper separation roller B when one sheet is conveyed is n (0 ≦ n ≦ 1); In the case where the leaves overlap, the load ratio of the uppermost sheet and the lower sheet to the lower sheet is k (0 ≦ k ≦ 1), and the lower transport belt C and The inclination angle of the sheet conveyance path by the driven roller 13 and the separation rollers A and B is θ, and the inclination angle of the separation rollers A and B is Sheet separated Te is, f ₁ the conveying force obtained from the downstream side, when the conveying force paper sheet is obtained from the upstream side of the driven roller 13 f _2, defined as, in two as shown in FIG. 2 Since the upper sheet 2a of the stacked sheets is a sheet that is reversely conveyed to the upstream side, the resultant force applied to the sheet 2a is negative if the force toward the downstream side is positive. There must be.

Therefore,

(Equation 3) To summarize this expression for p _2,

(Equation 4) Becomes

Further, after the lower sheet 2b of the two stacked sheets is conveyed to the downstream side, as shown in FIG. 3, in the state where the upper sheet 2a is one sheet, Since the upper sheet 2a is a sheet conveyed to the downstream side, the resultant force applied to the sheet 2a must be positive if the force toward the downstream side is positive.

Therefore,

(Equation 5) To summarize this formula for the P _2,

(Equation 6) Next, because the further P ₂ is a biasing force is not a 0, a P _2> 0 .......

Therefore, the equation of P _{2 that} satisfies this condition:
, Are the conditions for separation.

By determining the paper sheet separation conditions in this manner, for example, the load of the spring 12 can be set, so that an appropriate urging force for separating the paper sheets can be applied to the driven roller 13. it can.

Next, the operation of the sheet separating mechanism 1 provided in the sheet processing apparatus having the above-described structure when the stacked sheets are actually separated will be described.

As shown in FIG. 1, the upstream side (the right side in FIG. 1)
When, for example, two sheets are conveyed in a gap between the opposing surfaces of the lower conveying belt C and the upper conveying belt 6 in a state where two sheets are overlapped with each other, among the sheets in the overlapped state, the sheet located above The upper surface of the leaf is transported downstream while contacting the lower surface of the upper transport belt 6, while the lower surface of the sheet located below is transported downstream while contacting the upper surface of the lower transport belt C. At this time, since the moving speed of the outer peripheral surface of the upper conveying belt 6 is driven so as to be relatively lower than the moving speed of the outer peripheral surface of the lower conveying belt C, paper sheets located below are moved. There is an effect that the overlapped sheets are separated, such that the sheets conveyed earlier and the sheets positioned above are conveyed with a delay. In the present embodiment, the description will be continued on the assumption that the separation of the paper sheets has not occurred.

Thereafter, when the sheets are conveyed by the conveyor belts 6 and C while overlapping the lower part of the driven roller 13, the driven roller 13 is attached to the spring 12 by the thickness of two sheets. It separates from the upper surface of the lower conveyor belt C while resisting the force. The stacked sheets sandwiched between the driven roller 13 and the lower transport belt C are transported by the transport force of the lower transport belt C, as shown in FIG. Is supplied to the gap between the outer peripheral surfaces.

At this time, the upper separating roller B is moved by the swinging mechanism 15a so that the distance between the separating rollers is equal to the thickness of two sheets, while the upper separating roller B resists the urging force of the spring 15c. Then, the outer peripheral surface of the upper separating roller B comes into contact with the upper surface of the paper sheet 2a, and the outer peripheral surface of the lower separating roller A comes into contact with the lower surface of the paper sheet 2b. Further, since the separation rollers A and B are driven to rotate in the same direction (counterclockwise in FIG. 1),
As shown in FIG. 5, the lower separation roller A conveys the lower sheet 2b of the overlapping sheets to the downstream side, and the upper separation roller B transfers the overlapping sheet. The paper sheet 2a located above the class is reversely conveyed to the upstream side.

In this case, since the moving speed of the outer peripheral surface of the upper separating roller B is higher than the moving speed of the outer peripheral surface of the lower separating roller A, the paper sheets are moved to the downstream side. Lower separation roller A driven to convey
And a conveying force corresponding to the lower conveying belt C is applied to the upper separating roller B driven to reversely convey the paper sheet to the upstream side, thereby shortening the separation time, which is an improvement in the sheet separating ability. Is achieved.

Further, by transporting the separated paper sheets 2b to the downstream side, the paper sheets 2b are held by the nipping and conveying rollers 20, 21.
The acquisition of b is started. At this time, the detection state of the optical sensor 25 changes from "bright" to "dark". At this time, the transport belts 6, C and the lower separation roller A for transporting the paper sheets to the downstream side are operated. The drive of the drive motor 9 to be stopped is stopped. As a result, immediately after the separation of the sheets by the separation rollers A and B, the sheets are newly separated from the separation rollers A and B from the upstream side.
Alternatively, there is no possibility of being conveyed to the nipping and conveying rollers 20 and 21, so that the occurrence of jams and the like can be suppressed, and the overlapped paper sheets can be surely separated by the separation rollers A and B.

Further, a nip transport roller 2 which takes in paper sheets downstream of the lower separation roller A and further transports the paper sheets further downstream.
Since the moving speed of the outer peripheral surface of 0 and 21 is configured to be faster than the moving speed of the outer peripheral surface of the lower separation roller A, the separation speed at the time when the separation of the paper sheets by the separation rollers A and B is completed. The paper sheets can be quickly conveyed to the downstream side, and the processing efficiency of the paper sheets can be improved.

Thereafter, when the detection state of the optical sensor 25 changes from "dark" to "bright", the drive of the drive motor 9 is started, and the sheet 2a separated from the sheet 2b is moved to the upstream side. The paper is further conveyed, and is taken in the nipping conveyance rollers 20 and 21.

As described above, the sheet separating mechanism 1 of the sheet processing apparatus of the present embodiment applies an appropriate urging force to the upper separation roller B or the driven roller 13 and
Since the upper separation roller B and the lower separation roller A facing each other can be driven to rotate in the same direction, even when the sheets are conveyed in a state of being overlapped from the upstream side, the upper separation roller B is still driven by this roller B. Only the paper sheets that come into contact with the surface can be reliably transported to the upstream side, and the lower separation roller A can reliably transport only the paper sheets that come into contact with the surface of the roller A to the downstream side. Thus, the overlapped paper sheets can be reliably separated one by one.

Therefore, according to the paper sheet processing apparatus of the present embodiment, the occurrence of jams and the like during the conveyance of paper sheets is suppressed, so that the paper sheets are less likely to be damaged. In addition, the necessity of stopping the operation of the apparatus is reduced, and the processing efficiency of paper sheets can be improved.

Further, the sheet processing apparatus of the present embodiment
The separation rollers, which are main parts of the paper sheet separation mechanism 1, are separated from each other at a predetermined interval, and the apparatus is operating and the paper sheets are not directly conveyed. However, there is no danger that the surfaces facing each other will not be rubbed because they do not slide with each other, so that the necessity of manufacturing the separation rollers A and B with an expensive material having excellent wear resistance is reduced, and the cost is relatively low. Parts can constitute a paper sheet separating mechanism.

In the sheet separating mechanism of this embodiment, the swing mechanism is provided only on the upper separating roller B. However, as shown in FIG.
May be added to further improve the separation ability.

In this embodiment, the paper sheet to be processed is not specified. However, the paper sheet processing of the present invention is assumed to process various paper sheets represented by, for example, forms, prepaid cards, and the like. An apparatus can be used.

[0058]

As described above, the paper sheet processing apparatus according to the first aspect of the present invention includes, for example, at least one of a pair of separation rollers contacting the surface of a paper sheet, and a driven roller formed of a pair. An urging force is applied to at least one of the transport bodies, and the pair of separation rollers can be driven to rotate in the same direction. And the other separation roller can reliably convey the paper sheets in contact with the outer peripheral surface of the roller to the downstream side, thereby reliably separating the stacked paper sheets one by one. can do. Therefore, according to this paper sheet processing apparatus, the occurrence of jams and the like during the conveyance of paper sheets is suppressed, so that damage to the paper sheets is reduced, and the operation of the apparatus is stopped. The necessity of performing such operations is reduced, and the processing efficiency of paper sheets can be improved.

Further, according to the sheet processing apparatus of the second or third aspect, when the separation condition of the sheet is determined, an appropriate urging force for separating the sheet is applied to the separation roller A, for example. Alternatively, since it can be applied to a driven roller or the like, it is possible to increase the ability to separate paper sheets, and it is possible to improve the processing efficiency of paper sheets.

Further, in the paper sheet processing apparatus according to the present invention, when the transporting body and the driven roller are provided at an interval smaller than the thickness of substantially one sheet of paper, The paper can be conveyed to the downstream side while sandwiching the paper with the driven roller, and even when the apparatus is in operation and the paper is not directly conveyed, the opposing surfaces of the papers can be conveyed. Since there is no danger that the surface will not be worn without sliding, the necessity of manufacturing the carrier and the driven roller with an expensive material with excellent wear resistance is reduced, and paper processing with relatively inexpensive parts A sheet separating mechanism in the apparatus can be configured.

According to the paper sheet processing apparatus of the fifth aspect, even when three or more paper sheets are conveyed in an overlapped manner, for example, jamming does not occur and the paper sheets are stacked. Paper sheets can be separated one by one.

Further, in the paper sheet processing apparatus according to the present invention, when the paper sheets conveyed to a pair of separation rollers on the downstream side are overlapped, the paper sheet contacting the outer peripheral surface of each belt. Since a difference can be given to the transport speed of the leaves, the overlapped paper sheets can be slightly shifted and supplied to the separation roller or the like. Further, according to the present invention, the opposing transport belts are provided at predetermined intervals, and even when the apparatus is in operation, the opposing surfaces do not slide with each other and the surfaces are worn. Since there is no fear, the necessity of using a transport belt of an expensive material having excellent abrasion resistance is reduced, and the sheet separating mechanism in the sheet processing apparatus can be configured with relatively inexpensive parts.

According to the paper sheet processing apparatus of the present invention, for example, while the paper sheet is being taken in by the nipping and conveying roller provided downstream of the separation roller, for example, the conveying means or Immediately after the separation of the paper sheet by the separation roller, by controlling the separation roller driving means and stopping the conveyance of the paper sheet to the separation roller or the rotation drive of the separation roller, a new paper sheet from the upstream side, There is no danger of being conveyed to the separation roller or the nipping conveyance roller, so that the occurrence of jams and the like can be suppressed, and the stacked paper sheets can be surely separated by the separation roller.

Further, in the paper sheet processing apparatus according to the present invention, the moving speed of the outer peripheral surface of the first separation roller, which is rotationally driven so that the contacting paper sheet is conveyed to the downstream side, can be reduced.
Since the moving speed of the outer peripheral surface of the second separation roller that is rotationally driven so that the contacting paper sheet is reversely conveyed to the upstream side is configured to be fast, the paper sheet is conveyed to the downstream side. Is applied to the second separation roller driven to reversely convey the paper sheet to the upstream side by the first separation roller that is driven by the first separation roller and the conveyance means described above. It is possible to shorten the separation time, which is an improvement in the separation ability.

In the paper sheet processing apparatus according to the ninth aspect, the moving speed of the outer peripheral surface of the first separation roller, which is driven to rotate so that the contacting paper sheet is conveyed to the downstream side, can be reduced.
The sheet is taken in on the downstream side of the separation roller, and the moving speed of the outer peripheral surface of the pair of nipping and conveying rollers that convey the sheet to the downstream side is configured to be faster, so the separation of the sheet is completed by the separation roller. At this point, the paper sheet can be quickly conveyed to the downstream side, and the processing efficiency of the paper sheet can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing a sheet separating mechanism provided in a sheet processing apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a relationship between forces applied to respective members when a higher-order sheet of two stacked sheets is separated by the sheet processing apparatus illustrated in FIG. 1;

FIG. 3 is a diagram showing a relationship between forces applied to each member when one sheet is conveyed downstream by the sheet processing apparatus shown in FIG. 1;

FIG. 4 is a cross-sectional view illustrating a state before overlapping sheets are separated by a sheet separation mechanism of the sheet processing apparatus illustrated in FIG. 1;

FIG. 5 is a cross-sectional view illustrating a state in which the stacked sheets are separated by the sheet separation mechanism of the sheet processing apparatus illustrated in FIG. 1;

FIG. 6 is a sectional view showing another sheet separating mechanism different from the sheet separating mechanism shown in FIG. 1;

FIG. 7 is a cross-sectional view schematically showing a sheet separating mechanism provided in a conventional sheet processing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sheet separation mechanism 2, 2a, 2b ... Sheet 3 ... Separation part 4 ... Supply part 5 ... Take-in part 6 ... Upper conveyance belt C ... Lower conveyance belt 9, 19, 24 drive motor 10, 11, 16, 18, 23 pulley 12, 15c spring 13 driven roller A lower separation roller B upper separation roller 15a, 15d swing mechanism 15b ... Oscillating lever 20... Lower holding and conveying roller 21... Upper holding and conveying roller 25... Optical sensor

Claims (9)

[Claims] 1. A transporting means comprising a pair of a transporting body and a driven roller for nipping and transporting paper sheets, a transporting body driving means for driving the transporting body, and at least one of the transporting body and the driven roller being the other. A first urging means for urging the sheet with a predetermined force, and a first urging means which is arranged downstream of the conveying means, and which is larger than substantially one sheet thickness of the sheet when the sheet is not conveyed. A pair of separation rollers arranged at intervals smaller than the thickness of the sheet, at least one of which is movable in a direction away from the other, and a direction in which at least one of the pair of separation rollers approaches the other separation roller A sheet processing apparatus comprising: a second urging unit that urges the pair of separation rollers in the same direction; and a second urging unit that urges the pair of separation rollers in the same direction. 2. A transport unit comprising a pair of a transport body C and a driven roller for transporting a sheet while nipping the paper sheet, a transport unit driving unit for driving the transport body, and the driven roller facing the transport body C. A first urging unit for urging with a predetermined force, a first urging unit being arranged downstream of the conveying unit, and having a thickness larger than substantially one sheet and substantially equal to two sheets when the sheet is not conveyed. A pair of separation rollers A, B that are arranged at an interval smaller than the thickness of the separation roller and at least one of the separation roller B and the separation roller A is movable in a direction away from the other separation roller; A second urging means for urging at least one of the rollers A with a predetermined force in a direction approaching the other separation roller; and a separation roller drive for rotating the pair of separation rollers A and B in the same direction. With means Sheet processing apparatus according to claim and. 3. The sheet processing apparatus according to claim 2, wherein the urging force applied to the separation roller B or the separation roller A is P ₁ , the urging force applied to the driven roller is P ₂ , and the separation roller A and the paper are separated. The coefficient of friction between the leaves is μra, the coefficient of friction between the separation roller B and the sheet is μrb, the coefficient of friction between the carrier C and the sheet is μrc, the coefficient of friction between the sheets is μp, and the separation is The mass of one sheet of paper between the rollers A and B or between the conveyance body C and the driven roller is m, the gravitational acceleration is g, and the separation roller A when one sheet of paper is conveyed. The load ratio of the paper sheet to the separation roller A between the separation roller A and the conveyance body C is e (0 ≦ e ≦ 1), and the separation roller A and the conveyance body when one sheet is conveyed. C, the load ratio of the paper sheet to the carrier C is h (0 ≦ h ≦ 1, 0 ≦ e + h ≦ 1) The contact load ratio of the sheet to the surface of the separation roller B between the separation roller A and the separation roller B when one sheet is conveyed is n (0 ≦ n ≦ 1). K (0 ≦ k ≦ 1), where k is the load ratio of the uppermost sheet and the lower sheet when the sheets are conveyed in an overlapping manner, And the inclination angle of the conveyance path of the paper sheet by the pair of separation rollers is θ, the paper sheet separated by the pair of separation rollers has a conveyance force f ₁ obtained from the downstream side, and the conveyance force obtained from the upstream side of the conveyance unit. Assuming that the transport force obtained by the paper sheet is f ₂ , A paper sheet processing apparatus characterized by satisfying each of the following relational expressions. 4. The paper sheet processing apparatus according to claim 1, wherein the transport unit is configured such that the transport body and the driven roller contact each other at a position where their outer peripheral surfaces are in contact with each other, or approximately the paper sheet. A sheet processing apparatus provided with an interval smaller than the thickness of one sheet. 5. The paper sheet processing apparatus according to claim 1, wherein the pair of separation rollers can interpose three or more paper sheets. 6. The paper sheet processing apparatus according to claim 1, wherein the paper sheet that comes into contact with the outer peripheral surface is rotationally driven to be transported to the downstream side by the transport body. A belt provided at a position upstream of a driven roller of the conveying means and at a predetermined distance from an outer peripheral surface of the first conveyor belt, and in contact with the outer peripheral surface; A second transport belt that is driven so that the leaves are transported to the downstream side; and a drive control unit that controls driving of the first transport belt and the second transport belt. Paper sheet processing device. 7. The sheet processing apparatus according to claim 1, wherein the pair of separation rollers hold the sheet conveyed from an upstream side and convey the sheet further downstream. Detecting means for detecting whether or not a sheet is being taken in by the pair of nipping and conveying rollers; and, based on a detection result by the detecting means, rotating the separation roller by the separation roller driving means, or A sheet processing apparatus, further comprising control means for controlling conveyance of the sheet by the conveying means. 8. The sheet processing apparatus according to claim 1, wherein the pair of separation rollers includes a first separation roller that is driven to rotate so that the contacting sheet is conveyed downstream. A second separation roller that is rotationally driven so that the contacting paper sheet is reversely conveyed to the upstream side, and the outer peripheral surface of the second separation roller driven by the separation roller driving unit is moved. The paper sheet processing apparatus, wherein the speed is higher than the moving speed of the outer peripheral surface of the first separation roller. 9. The sheet processing apparatus according to claim 8, further comprising: a pair of nipping and conveying rollers that further convey the sheets conveyed from an upstream side by the pair of separation rollers to a further downstream side. Wherein the moving speed of the outer peripheral surface when driving the nipping and conveying roller is faster than the moving speed of the outer peripheral surface of the first separation roller driven by the separation roller driving means. Type processing equipment.