JP4599004B2 - Paper sheet take-out device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper sheet take-out apparatus, and more particularly, to a paper sheet take-out apparatus that separates and takes out paper sheets such as stacked banknotes one by one.
[0002]
[Prior art]
As this type of paper sheet take-out device, for example, a friction type apparatus that takes out paper sheets by the frictional force of a rubber roller is known. As described above, the paper sheet take-out device is required to reliably separate the paper sheets and take them out without skew. In addition, it is desired to enable stable removal that is not easily affected by the thickness or friction coefficient of paper sheets, and in the case of banknotes and the like, those that are not affected by the difference in type and size. On the other hand, from the viewpoint of the processing capability of the take-out device, it is desired to be able to take out a large number of sheets within a unit time.
[0003]
By the way, the paper sheet take-out system includes a gate roller system or a pressure roller system depending on the structure of the separating portion, and the former is generally used.
[0004]
The gate roller type take-out device includes a take-out roller and a gate roller provided to face the take-out roller. The take-out roller and the gate roller are arranged so as to be nested in a comb shape, and a three-dimensional gap is formed between them.
[0005]
The paper sheets are fed into the supply unit in a stacked state, and are sent out as the pickup roller, which is a sending roller, rotates. The fed paper sheets are passed through a gap between the take-out roller and the gate roller, and are sequentially separated from the stacked paper sheets by the frictional force of the gate roller and taken out. The paper sheet taken out by the take-out roller is nipped and conveyed by a drive roller provided in the take-out direction of the take-out roller and a pinch roller in contact with the drive roller.
[0006]
However, the gate roller system is susceptible to the thickness of the paper sheet because the paper sheet is separated by the frictional force generated by the gap. That is, there is an optimum gap with respect to the thickness of the paper sheet. However, a paper sheet thicker than this gap or a thin paper sheet tends to cause a separation failure.
[0007]
This is because the pressing force against the paper sheet generated between the take-out roller and the separation roller is different between the thick paper sheet and the thin paper sheet. Usually, when the gap is too wide, the separating force is reduced and two sheets are likely to be taken. On the other hand, if the gap is too narrow, the passage resistance increases, and it becomes impossible to feed the paper sheets with the pickup roller, and skipping causes defective picking.
[0008]
Also, the conveyance speed of the taken-out paper sheets is often equal to or faster than the paper-sheet taking-out speed. For this reason, when the paper sheet passing through the gap is pulled out by the drive roller and the pinch roller, if the gap is small, the resistance increases, which causes the paper sheet to stagnate, skew, or the like.
[0009]
Further, when there is a thickness distribution by printing such as banknotes, a difference in resistance occurs between the left and right, and skew is likely to occur. Further, since the gate roller always slides with the paper sheet, the gate roller easily wears, and if worn, the gap widens. The gap can be adjusted, but it must always be adjusted and kept at an optimum value, which is troublesome for maintenance.
[0010]
In order to solve such problems, a pressure roller type paper sheet take-out device has been developed. This pressure roller system includes an idle roller and a pressure roller pressed against the idle roller, and separates paper sheets by the frictional force of the pressure roller. This pressure roller system has an advantage that the pressing force of the paper sheet between the idling roller and the pressure roller can be made constant, so that it is hardly affected by the thickness of the paper sheet. The drive roller that is coaxial with the idle roller forms a conveyance path together with the pinch roller, and conveys the separated paper sheets.
[0011]
[Problems to be solved by the invention]
However, in the pressure roller system, the contact portion between the idling roller and the pressure roller has only a resistance against paper sheets, and there is no paper sheet feeding force. For this reason, when the paper sheet is fed to the contact portion between the idling roller and the pressure roller by the rotation of the pickup roller, the paper sheet having a low stiffness, such as a distributed banknote, may be buckled due to the resistance of the pressure roller. Furthermore, there is a problem that the leading edge of the paper sheet is curled or damaged.
[0012]
In addition, regardless of the gate roller type or the pressure roller type, an appropriate friction coefficient is required for the gate roller or the pressure roller that gives separation force to the paper sheet. Furthermore, it is necessary to increase the frictional force between the separation roller and the paper sheet than the frictional force between the paper sheets generated in the separation unit, and to reduce the resistance through which the paper sheet passes.
[0013]
Therefore, when selecting the material of the gate roller or the pressure roller, it must be selected from a limited range from the viewpoint of the coefficient of friction. Further, there is a problem that if the friction coefficient changes due to wear or aging, the separation force is affected.
[0014]
In addition, in both the gate roller system and the pressure roller system, the sheet conveying force in the separation unit is not stable or unstable, so the distance between the rollers from the pickup roller to the drive roller is It is made shorter than the length of the kind in the conveyance direction. Thus, a conveying force is always applied to the paper sheet by the pickup roller or the drive roller.
[0015]
However, if the length of the paper sheet in the conveyance direction is shorter than the distance between the rollers, the diameter of the pickup roller, the take-out roller, the drive roller, etc. must be sacrificed or nested, There is a problem of being restricted. In addition, when the length in the transport direction differs depending on the type of bill such as banknotes, there is a problem that taking out a long ticket becomes unstable if the distance between rollers is adjusted to the shortest type of ticket, and the system is unbalanced. .
[0016]
On the other hand, in both cases of the gate roller method and the pressure roller method, the paper sheet is fed by the pickup roller, and particularly when there are a pair of left and right pickup rollers, the pressing force of the pair of pickup rollers against the paper sheet is left and right. If they are different, it causes skew. If the paper sheet has a crease or a paper sheet that is tilted, the pickup roller does not uniformly contact the paper sheet on the left and right.
[0017]
This phenomenon becomes noticeable when the number of sheets set is large. When the number of paper sheets is large, the pressing force to the pickup roller decreases due to the friction force between the paper tray and the tray on which the paper sheets are set, and the paper sheet, and the pressing force to the left and right pickup rollers is uneven. Sometimes.
[0018]
Further, due to the difference in the thickness distribution of the intaglio-printed ink on the paper sheets, when the number of paper sheets increases, the pressing force of the paper sheets against the pickup roller becomes non-uniform. For example, in the case of government seals and new bills, there are cases where the direction (front and back, left and right, top and bottom) of paper sheets are aligned and used in a set of many sheets at once. When about 1000 to 2000 sheets of paper are stacked, the non-uniform thickness of the bundle reaches several mm to several tens of mm, and may not even contact the pickup roller on one side.
[0019]
Intaglio printing of paper sheets generates a distribution of the coefficient of friction against the pickup roller in addition to the thickness. For this reason, depending on the overlap of the two distributions, the left and right non-uniformity of the feeding force by the pickup roller may be further increased. Conventionally, various countermeasures have been taken against the unevenness of the pressing force of the paper sheets against the pickup roller.
[0020]
The paper sheet is pressed against the pickup roller by pressing the backup plate. The pressing force of the backup plate is controlled by a spring or a motor. At this time, the pressing force is set higher. This is for correcting the wrinkles of the paper sheets so that they contact the pickup roller more uniformly. Furthermore, there is also an object to compensate for a decrease in pressing force due to friction on the tray and the wall surface.
[0021]
However, when the pressing force of the paper sheet is increased, the feeding force of the pickup roller is increased, and the margin for taking two sheets of the paper sheet is narrowed. In order to solve this problem, the backup plate that presses the paper sheet against the pickup roller is supported by a fulcrum so as to be a left and right seesaw, or an elastic body such as a sponge is attached to the backup plate. This method is highly effective when the number of paper sheets is small, but is not effective when the number of sheets is increased to 1000 or 2000 sheets. When the swing angle of the seesaw is large, the entire bundle of paper sheets is tilted like a rigid body, and the contact with the pickup roller is not improved and may cause adverse effects. Therefore, the swing amount cannot be increased much.
[0022]
In addition, a method of increasing the rubber thickness of the pick-up roller, moving it in the left-right pressing direction, or supporting it in a seesaw manner is also performed. In order to improve the contact of a large number of sheets, it is necessary to move the positions of the left and right rollers greatly, and the seesaw type is effective. However, since the swing amount is restricted due to the phase relationship with the take-out roller, the left and right pressing cannot be balanced completely.
[0023]
Further, in the gate roller system, the left and right gaps can be controlled by an actuator, and the gap amount is controlled by detecting the skew amount of the extracted paper sheet. However, in this method, the gap amount is controlled for the subsequent paper sheets from the information of the paper sheets already taken out. For this reason, it is possible to cope with the wear of the gate roller and the average change in the thickness of the paper sheet, but it is difficult to correct the skew due to the non-uniform pressure on each paper sheet.
[0024]
The present invention has been made in view of the above-described problems, and can be taken out one by one stably over a long period of time without being affected by the thickness, friction coefficient, and length of paper sheets. An object of the present invention is to provide a possible paper sheet take-out device.
[0025]
[Means for Solving the Problems]
  According to this embodiment,
A delivery roller for delivering paper sheets;Its peripheral surface is made of rubber,The paper sheet sent out by the delivery roller is taken out by rotating, and the take-out roller is pressed against the take-out roller, and a rotational torque in the direction opposite to the paper take-out direction is applied, thereby giving the paper sheet 1 Separate one by oneThe whole circumference was made of rubberA separation roller; a conveyance roller for conveying the paper sheet taken out by the take-out roller; a detection means for detecting the paper sheet carried out by the conveyance roller; and the detection means,eachDetects trailing edge of paperEvery timeAnd a control means for stopping the take-out roller by rotating it reversely.A paper sheet take-out device is provided.
  Moreover, according to this embodiment,
  A delivery roller for delivering paper sheets, a peripheral surface formed of rubber, a take-out roller for taking out paper sheets delivered by the delivery roller, and a pressure roller contacting the take-out roller to take out the paper sheets A separation roller formed of rubber on the entire circumference for separating the paper sheets one by one by applying a rotational torque in the direction opposite to the direction, and a detecting means for detecting the paper sheets taken out by the take-out roller; And a control means for stopping the take-out roller by rotating it reversely each time the detecting means detects the rear end of each paper sheet. The
[0026]
  According to this embodiment,
  A delivery roller for delivering paper sheets, a peripheral surface formed of rubber, a take-out roller for taking out paper sheets delivered by the delivery roller, and a pressure roller contacting the take-out roller to take out the paper sheets A separation roller formed of rubber on the entire circumference for separating the sheets one by one by applying a rotational torque in the direction opposite to the direction, and a conveyance roller for conveying the sheets taken out by the take-out roller; Detecting means for detecting the paper sheet carried out by the transport roller, and each time the detecting means detects the rear end of a predetermined n number of paper sheets, the take-out roller is reversely rotated and stopped. And a paper sheet take-out device comprising a control means.
  Moreover, according to this embodiment,
  A delivery roller for delivering paper sheets, a peripheral surface formed of rubber, a take-out roller for taking out paper sheets delivered by the delivery roller, and a pressure roller contacting the take-out roller to take out the paper sheets A separation roller formed of rubber on the entire circumference for separating the paper sheets one by one by applying a rotational torque in the direction opposite to the direction, and a detecting means for detecting the paper sheets taken out by the take-out roller; And a control means for stopping the take-out roller by rotating it reversely each time the detecting means detects the rear end portion of the predetermined n sheets of paper sheets. Is provided.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a paper sheet takeout device according to an embodiment of the present invention will be described in detail with reference to the drawings.
[0029]
As shown in FIG. 1, a housing 1 of a banknote sorting processor to which a paper sheet takeout device, for example, a banknote takeout device is applied, includes a table portion 1A provided at a central portion on one side thereof. The table unit 1 </ b> A includes a banknote supply unit 2. The banknote supply unit 2 stores a plurality of banknotes P as paper sheets in a standing state. The banknote P is pressed against a pickup roller 5 as a delivery roller by a backup plate 4 as pressing means biased by a spring 3. The pickup roller 5 feeds the bills P downward by rotating. A separation unit 32 and a conveyance unit 37 (shown in FIG. 2) constituting a paper sheet take-out device, which will be described in detail later, are disposed below the pickup roller 5.
[0030]
The clamp-type transport mechanism H is configured by the belt 6 and the roller 7 and transports the bills P carried out from the transport unit 37. The transport mechanism H is provided with a posture correction device 8 that automatically corrects the shift and skew of the banknote P that has been taken out. A determination unit 9 is provided on the downstream side of the conveyance mechanism H in the bill conveyance direction. The determination unit 9 reads various information from the front and back surfaces of the banknote P conveyed by the roller pair 10, performs a logical operation on the information, and compares it with the reference information to obtain dirt, breakage, amount, top and bottom And the four directions of the front and back sides.
[0031]
A first branching device 11 is provided on the downstream side of the determination unit 9 in the bill conveyance direction. The first branching device 11 takes the two pieces that are not determined to be normal banknotes P, such as two sheets taken by the determination unit 9 or a large skiing banknote more than a certain value, to the reject box 12 and is determined to be the normal banknotes P. To the second branching device 13.
[0032]
The 2nd branching device 13 distributes the conveyance direction of the banknote P to the 1st and 2nd direction. A left-right reversing path 14 is provided in the first direction, and the left-right reversing path 14 has a velvet belt 15 that reverses the banknote P 180 degrees left and right. A belt conveyance unit 16 is provided in the second direction, and the belt conveyance unit 16 conveys the banknote P as it is.
[0033]
On the downstream side in the first and second directions, a merging portion 17 where the banknotes P branched and conveyed in the respective directions are joined is provided. The path lengths of the branch paths to the merging portion 17 are formed to be equal so that the interval after the banknote merging is not shifted.
[0034]
A third branch device 18 is provided on the downstream side of the merge portion 17 in the bill conveyance direction, and the third branch device 18 distributes the bill P in the third and fourth directions. A switchback path unit 19 is provided in the third direction. The switchback path 19 is provided with a reversing box 20 for introducing the banknote P, and a rotary wheel 21 for pressing the rear end of the banknote P guided to the reversing box 20 against the reversing roller 21a. In the switchback path unit 19, the banknote P is sent out from the reversing box 20, so that the top of the banknote P is reversed and conveyed. A belt conveyance unit 22 is provided in the fourth direction, and the belt conveyance unit 22 conveys the banknote P while maintaining the posture.
[0035]
On the downstream side in the third and fourth directions, a merging portion 23 where the banknotes P branched and conveyed in the respective directions are joined is provided. The path lengths of the branch paths to the merging portion 23 are formed to be equal so that the interval after the banknote merging is not shifted.
[0036]
A horizontal conveyance path 24 is provided on the downstream side in the banknote conveyance direction of the merging portion 23. In this horizontal conveyance path 24, the number of branching devices 25a to 25d, which is one less than the number of parts to be divided, is disposed. Below the branching devices 25a to 25d, first to fourth type-specific pocket portions 26a to 26d are arranged as a collecting portion. In these types of pocket portions 26a to 26, the bills P are stacked in a horizontal state and accumulated.
[0037]
A sealing device 27 is provided below the first branch device 25a. The sealing device 27 includes a stacking unit 28 that stacks and sorts 100 banknotes P, a transport unit 28a that transports the banknotes P from the stacking unit 28, and the banknotes P that are transported by the transport unit 28a. And a belt winding portion 29 that is bound by a paper belt 29a.
[0038]
FIG. 2 is a diagram schematically showing a configuration of a banknote takeout device as a paper sheet takeout device.
[0039]
This banknote taking-out device is constituted by the above-described pickup rollers 5 and 5, the separation unit 32 and the conveyance unit 37, and these pickup rollers 5 and 5, the separation unit 32 and the conveyance unit 37 are arranged along the vertical direction. .
[0040]
The separation unit 32 includes take-out rollers 30 and 30. Reversing rollers 31, 31 as separation rollers are pressed against these take-out rollers 30, 30. The transport unit 37 includes drive rollers 34 and 34 that function as transport rollers disposed below the take-out rollers 30 and 30. Pinch rollers 35 and 35 are in rolling contact with these drive rollers 34 and 34.
[0041]
The bills P are pulled out and conveyed by the drive rollers 34 and 34 and the pinch rollers 35 and 35. The pickup roller 5, the take-out roller 30, the reverse rotation roller 31, the drive roller 34, and the pinch roller 35 are arranged one by one on the left and right sides, and take out the banknote P along the short direction.
[0042]
The take-out roller 30 of the separation part 32 has a peripheral surface formed of rubber, and is attached to the shaft 36 via a one-way clutch 30a. The take-out roller 30 can rotate freely in the take-out direction of the banknote P, and is designed to reduce resistance when the banknote P is pulled out by the drive roller 34 and the pinch roller 35. The shaft 36 is attached to the frame 39 via a bearing 38. A take-out motor 41 is connected to one end of the shaft 36 via a pulley 40a, a timing belt 40b, and a pulley 40c.
[0043]
In this embodiment, the one-way clutch 30a is provided on the take-out roller 30, but the take-off roller 30 is fixed to the shaft 36, the one-way clutch 30a is provided on the timing pulley 40a, and is rotated between the shaft 36 and the pulley 40a. You may be able to do it.
[0044]
The shaft 43 of the pickup roller 5 is connected to the shaft 46 through a pulley 45a, a timing belt 45b, and a pulley 45c. Both ends of the shaft 46 are supported by frames 39 and 39. A pickup motor 49 is connected to one end of the shaft 46 via a pulley 48a, a timing belt 48b, and a pulley 48c. The shaft 43 is rotatably attached to the bracket 51. The bracket 51 is attached to the bracket 53 via a shaft 52.
[0045]
The bracket 53 is attached to the frames 39, 39 via a shaft 46, and is provided so as to be pivotable to the left and right. A compression spring 56 is provided between the bracket 51 and the stay 55. As a result, the pickup rollers 5 and 5 on the left and right are devised so that the left and right pick-up rollers 5 and 5 are slightly changed in position to the front and rear and the left and right to generate a uniform left and right pressing force against the banknote P.
[0046]
The reverse rotation roller 31 is formed of rubber all around its circumference. As this rubber, a rubber having a higher coefficient of friction with respect to the bills P than that between the bills P is used. The reverse rotation roller 31 is rotatably attached to the upper end portion of the swing lever 59 via a shaft 58. The lower end portion of the swing lever 59 is rotatably supported by a shaft 60 as a support portion. The swing lever 59 is urged by a spring 62 and presses the reverse rotation roller 31 against the take-out roller 30.
[0047]
A reverse motor 64 is connected to the shaft 58 of the reverse rotation roller 31 via a pulley 63a, a timing belt 63b, and a pulley 63c. The reverse motor 64 rotates the reverse rotation roller 31 in the reverse direction with respect to the bill P taking-out direction. As will be described later, the reverse rotation roller 31 rotates in the take-out direction along with the take-out roller 30, but the reverse rotation torque is always applied in the reverse direction and generates a separating force for the banknote P.
[0048]
The pitch diameters of the timing pulley 63a fixed to the shaft 58 of the reverse rotation roller 31 and the timing pulley 63c attached to the drive shaft 64a of the reverse motor 64 are the same. The reverse motor 64 is fixed to the stay 67 so that the axis of the shaft 60 of the swing lever 59 is positioned on the axis of the drive shaft 64a.
[0049]
The drive roller 34 is swung on the frames 39 and 39 via a shaft 69. The shaft 69 is connected to the transport motor 71 via a pulley 70a, a timing belt 70b, and a pulley 70c. The pinch roller 35 is rotatably supported by the shaft 73. Both ends of the shaft 73 are supported by the horizontal elongated holes 39 a of the frames 39 and 39 and are urged by springs 74. The pinch roller 35 is pressed against the drive roller 34 by the urging force of the spring 74 to generate a conveying force.
[0050]
In the vicinity of the take-out roller 30 and the reverse rotation roller 31, a first detection sensor 76 that functions as first detection means (or detection means) that detects the banknote P delivered from the take-out roller 30 and the reverse rotation roller 31 is provided. . In the vicinity of the drive roller 34 and the pinch roller 35, a second detection sensor 77 that functions as second detection means (or detection means) for detecting the banknote P sent out from the drive roller 34 and the pinch roller 35 is provided. .
[0051]
The first and second detection sensors 76 and 77 are, for example, light transmission type optical sensors, and are attached to the bracket 79. The optical axis of the first detection sensor 76 passes through a conveyance path between the contact portion between the take-out roller 30 and the reverse rotation roller 31 and the contact portion between the drive roller 34 and the pinch roller 35. The optical axis of the second detection sensor 77 passes through the conveyance path immediately after the contact portion between the drive roller 34 and the pinch roller 35.
[0052]
Drivers 81, 82, and 83 are connected to the take-out motor 41, the pickup motor 49, and the transport motor 71, respectively. A controller 85 that functions as control means is connected to the drivers 81, 82, and 83 via a control circuit. Note that since the take-out motor 41 and the pickup motor 49 require intermittent drive control, pulse motors are used.
[0053]
Drivers 89a and 89b are connected to the left and right reverse motors 64, and a controller 85 is connected to the drivers 89a and 89b via a control circuit. The reverse motor 64 is a DC motor capable of current control, and a required generated torque can be obtained by setting the current. A drive amplifier 90 is connected to the first and second detection sensors 76 and 77, detects the passage of the banknote P, and outputs information based on the detection result to the controller 85.
[0054]
Next, the principle of generation of the separation force in the separation unit 32 will be described with reference to FIGS.
[0055]
FIG. 3 is a view showing a state in which there is no banknote P between the take-out roller 30 and the reverse rotation roller 31, and the reverse rotation roller 31 rotates in the transport direction as the take-out roller 30 rotates. The reverse rotation roller 31 is pressed against the take-out roller 30 with a predetermined pressing force H, and a reverse rotation torque T is applied by the reverse motor 64. However, since the reverse roller 31 is higher in torque due to the tangential force that is the frictional force with the take-out roller 30 than the reverse torque T, the reverse motor 64 slips and rotates in the transport direction as the take-out roller 30 rotates.
[0056]
FIG. 4 is a diagram illustrating a state in which one banknote P is interposed between the take-out roller 30 and the reverse rotation roller 31, and the reverse rotation roller 31 is caused by the tangential force generated by the frictional force between the banknote P and the reverse rotation roller 31. Since the reverse rotation torque T is set smaller than the torque, the reverse rotation roller 31 is rotated in the transport direction via the banknote P.
[0057]
FIG. 5 is a diagram showing a state in which two banknotes P are interposed between the take-out roller 30 and the reverse rotation roller 31. Since the frictional force generated between the banknotes P1 and P2 is small, the torque of the reverse motor 64 is shown. T is winning and starting to reverse in the transport direction.
[0058]
FIG. 6 is a diagram illustrating a state in which the second banknote P2 is pulled back by the reverse rotation of the reverse motor 64. The state of FIG. 6 is substantially the same as the state of FIG. 4, and the first banknote P1 is transported along the transport direction. Thus, even if it is going to take out two banknotes, the 2nd banknote P2 is pulled back by the reverse rotation roller 31, and only the 1st banknote P1 is taken out. Actually, the state shown in FIGS. 5 and 6 is repeated in a vibrational manner every time one banknote P is taken out, and is separated and taken out one by one.
[0059]
The tangential force that the second banknote P2 receives from the reverse rotation roller 31 acts as a separating force. The apparent friction coefficient of the reverse rotation roller 31 due to the tangential force and the pressing force is (reverse rotation torque / reverse rotation roller radius) / (pressing force of the reverse rotation roller to the take-out roller). The pressing force of the reverse rotation roller 31 to the take-out roller 30 is generated by a constant spring force. For this reason, by controlling the reverse rotation torque to be constant, the apparent friction coefficient of the reverse rotation roller 31 can be kept constant, and a stable separation force can be given.
[0060]
Moreover, an apparent friction coefficient can be set by changing the reverse rotation torque. The friction coefficient between the take-out roller 30 and the reverse rotation roller 31 only needs to be higher than the friction coefficient between the bills P1 and P2. If the friction coefficient between the take-out roller 30 and the reverse rotation roller 31 is high, the feed force and the separation force can be kept stable.
[0061]
Unlike the gate roller, the reverse rotation roller 31 does not need to maintain a moderate coefficient of friction, and the range of selection of materials is widened. Further, unlike the gate roller, the reverse rotation roller 31 does not always slip with the banknote P, and in principle, does not slip with the banknote, which is advantageous in terms of wear resistance. The reverse roller 31 actually slips with respect to the take-out roller 30 and the bill P, but a material with good durability may be selected in consideration of this.
[0062]
FIG.7 and FIG.8 is a figure which shows the layout of each roller of a banknote taking-out apparatus.
[0063]
In the vicinity of the pickup roller 5, a banknote detection sensor S that detects whether or not there is a banknote P pressed by the backup plate 4 is disposed. The banknote detection sensor S is, for example, a light transmission type optical sensor.
[0064]
The pickup roller 5 comes into contact with the banknote P pressed by the backup plate 4 and rotates to feed the banknote P into the separation unit 32 and feed out the banknote P in cooperation with the take-out roller 30. Although the reverse rotation torque is applied to the reverse rotation roller 31 during the take-out operation, the reverse rotation torque is set so as to follow the rotation of the take-out roller 30 when there is no bill P. In the motor reverse roller (MRR) separation system, it is necessary to stably apply the pressing force to the take-out roller 30 and the reverse torque generated by the motor 64 to the reverse roller 31.
[0065]
By the way, in order to obtain a stable pressing force without being affected by the bills P and the generated torque, the layout of the rollers is important, and the following is considered.
[0066]
That is, a line segment connecting the contact portion where the bill P comes into contact with the pickup roller 5 and the contact portion 33 between the take-out roller 30 and the reverse roller 31 is represented by K1, and the center of the take-out roller 30 and the center of the reverse roller 31 Assuming that the line segment connecting the two is K2, and the line segment connecting the center of the reverse rotation roller 31 and the rotation center 60 of the swing lever 59 is K3, the line segment K1 and the line segment K2 intersect at an angle of approximately 90 °. is doing.
[0067]
That is, the common tangential direction of the take-out roller 30 and the reverse rotation roller 31 is the conveyance direction of the bills P. This is for making it easy to feed the banknote P to the contact portion 33 between the take-out roller 30 and the reverse rotation roller 31 and for suppressing the resistance received from the banknote P stacked by the banknote P returned by the reverse rotation roller 31.
[0068]
Further, the line segment K2 and the line segment K3 intersect at an angle of about 90 °. This is to prevent the frictional force generated in the separation unit 32 from affecting the pressing force of the reverse rotation roller 31. The moment generated in the reverse rotation roller 31 by the frictional force f acting on the surface of the reverse rotation roller 31 is balanced with the torque of the reverse motor 64 connected via the timing belt 63b. Eventually, a force f ′ having the same magnitude as the frictional force f acts on the swing lever 59 via the shaft 58.
[0069]
Further, by setting the crossing angle between the line segment K2 and the line segment K3 to 90 °, the vector of the force f ′ passes through the rotation center 60, so that the swing lever 59 is not rotated. Therefore, the pressing force generated at the contact portion 33 between the take-out roller 30 and the reverse rotation roller 31 can be kept constant. It is also important that the motor 64 be fixed to the stay 67 and not swing with the reverse rotation roller 31.
[0070]
The contact pressure between the take-out roller 30 and the reverse roller 31 is determined from the spring force of the spring 62 and the mounting position of the spring 62, and is constant without being affected by the rotation of the motor 64 or the frictional force of the roller surface. .
[0071]
FIG. 9 and FIG. 10 are diagrams showing a pressure contact state between the take-out roller 30 and the reverse rotation roller 31.
[0072]
The diameter of the timing pulley 63c on the motor 64 side that transmits the driving force from the motor 64 to the reverse rotation roller 31 is the same as the diameter of the timing pulley 63a on the reverse rotation roller 31 side, and the tension vector T and the pressing vector N of the timing belt 63b Are designed to be orthogonal.
[0073]
Here, the magnitude of the pressing vector N will be derived.
[0074]
From the balance of force applied to the swing lever 59
N−F + Rx = 0 Formula (1)
−μN−T / e + Ry = 0 Formula (2)
In the moment balance around the swing fulcrum applied to the swing lever 59, μN, T / e acts through the shaft 58 of the reverse rotation roller 31, and the vector passes through the fulcrum 60, and becomes zero.
−Nb + Fc = 0 Formula (3)
N = (c / b) F Formula (4)
It becomes.
[0075]
Therefore, a constant pressing force N can be applied regardless of the friction coefficient μ and the torque T.
[0076]
Where N: pressing force, a: roller radius, μN: tangential force, b: distance from fulcrum to pressing part, F: spring force, c: distance from fulcrum to spring, T / e: tension of timing belt (Correctly tension difference), e: pitch radius of the timing pulley, T: reverse torque of the motor, Rx, Ry: horizontal and vertical components of the force that the swing lever receives from the fulcrum.
[0077]
Next, the first control method of the bill removal operation will be described with reference to the flowchart shown in FIG. In addition, this 1st control method shall be performed only using the 2nd detection sensor 77 arrange | positioned at the carrying-out side of the drive roller 34 and the pinch roller 35. FIG.
[0078]
That is, when the start of taking out of the banknote P is requested (step S1), the controller 85 determines the presence or absence of the banknote P to be taken out based on the output signal from the banknote detection sensor S (step S2). When the controller 85 determines that there is a bill P to be taken out (step S2, YES), the controller 85 controls the driving of each roller to perform the bill P taking-out operation.
[0079]
First, the controller 85 drives the reverse rotation motor 64 to rotationally drive the reverse rotation roller 31 in the reverse direction (step S3). At this time, the pickup roller 5 and the take-out roller 30 are stopped. For this reason, the reverse rotation roller 31 does not rotate by the resistance force received from the take-out roller 30.
[0080]
Subsequently, the controller 85 drives the take-out motor 41 and the pickup motor 49 (step S4). Thereby, the take-out roller 30 and the pickup roller 4 are rotationally driven at a predetermined rotational speed.
[0081]
The take-out motor 41 and the pick-up motor 49 are increased to a predetermined speed by increasing the speed with substantially the same startup curve. Since a little time is lost until the leading edge of the bill P enters the separating portion 32 where the take-out roller 30 comes into contact with the reverse rotation roller 31, the speed of the take-out roller 30 should be slightly higher than the speed of the pickup roller 5. Banknote P does not buckle. For this reason, the reduction ratio between the take-out motor 41 and the pickup motor 49 and between the take-out roller 30 and the pickup roller 5 is changed.
[0082]
Moreover, the taking-out speed | rate of the banknote P is set to the value smaller than a conveyance speed. This is because the bill P buckles when the bill P is fed at a speed faster than the conveying roller 34 that is always rotating during the take-out operation. Furthermore, it is advantageous to set the take-out speed of the banknote P small in consideration of increasing the speed of the motor 41. However, if a speed difference is set too much, there is a risk of skew occurring when the bill P is pulled by the transport roller 34 and the pinch roller 35. Therefore, an appropriate value is set.
[0083]
Further, it is usually set to reach a predetermined take-out speed before the leading edge of the banknote P reaches the conveying roller 34 and the pinch roller 35. Based on the output signal from the second detection sensor 77, the controller 85 detects that the first banknote P sent out by the pickup roller 5 and the take-out roller 30 has reached the transport roller 34 (step S5). , YES), the drive of the take-out motor 41 and the pickup motor 49 is stopped (step S6).
[0084]
Since the take-out roller 30 has a built-in one-way clutch 30a, even if the take-out motor 41 is stopped, the take-out roller 30 is accompanied by the bill P conveyed by the carry roller 34 and gives resistance to the first bill P. There is no. After the leading edge of the first banknote P reaches the second detection sensor 77, the trailing edge of the banknote P is detached from the pickup roller 5.
[0085]
When the bill P is long and the trailing edge of the first bill P is still on the pickup roller 5, the first bill P is acted as a resistance. However, since the pressing force of the transport roller 34 and the pinch roller 35 is set to be larger than the pressing force of the pickup roller 5 to the banknote P, the banknote P is slid and transported with respect to the pickup roller 5. When the first banknote P is removed from the pickup roller 5 and the second banknote comes into contact with the pickup roller 5, the pickup roller 5 acts as a brake for the second banknote and prevents the banknote P from being taken out. .
[0086]
The controller 85 reversely drives the take-out motor 41 based on the detection of the rear end of the conveyed first banknote P (step S7, YES) (step S31). At this time, since the take-out roller 30 is attached to the shaft 36 via the one-way clutch 30a, the take-out roller 30 is reversely rotated by a frictional force with the reverse rotation roller 31 that is reversely rotated. That is, both the take-out roller 30 and the reverse rotation roller 31 are rotated in the reverse direction.
[0087]
At this time, the controller 85 controls the drive of the take-out motor 41 to rotate the take-out roller 30 by a predetermined angle, that is, an angle that cannot be divided by 360 degrees, for example, 7 degrees. As the take-out roller 30 rotates, the reverse rotation roller 31 is similarly rotated by a predetermined angle.
[0088]
Thus, by rotating the reverse rotation roller 31 by a predetermined angle that is not divisible by 360 degrees, it is possible to prevent uneven wear of the reverse rotation roller 31 and to perform a stable separation operation over a long period of time.
[0089]
The controller 85 controls the drive of the take-out motor 41 to rotate the take-out roller 30 by a predetermined angle, and then stops the drive of the take-out motor 41 (step S32).
[0090]
Subsequently, the controller 85 determines based on the output signal from the banknote detection sensor S whether or not the banknote P to be taken out is in the tray (step S8). If the controller 85 determines that there is a bill P (step S8, YES), the controller 85 returns to step S4 with an appropriate delay after stopping the take-out roller 30, and restarts the drive of the take-out motor 41 and the pickup motor 49. Then, the second banknote P is taken out.
[0091]
If the controller 85 determines that there is no banknote P on the tray (step S8, NO), the controller 85 stops driving the reverse rotation motor 64 and stops the reverse rotation roller 31 (step S9). Thereafter, the controller 85 stops the driving of all the motors, and the take-out operation ends (step S10).
[0092]
As described above, the pick-up roller 30 and the pick-up roller 5 are intermittently driven for each bill P and the bill P is taken out. After detecting the trailing edge of the banknote P previously taken out, in order to perform the operation of taking out the next banknote P, each banknote P is taken out such that the gap (size of the gap) between the banknotes P becomes constant. Therefore, when the length of the banknote P in the feeding direction is short, the processing speed (the number of banknotes taken out per unit time) increases, and when the length of the banknote P in the feeding direction is long, the processing speed decreases. Become.
[0093]
Such control is referred to as “constant gap extraction”. In the flowchart shown in FIG. 11, after the trailing edge of the bill P is detected in step S7, the take-out motor 41 and the pickup motor 49 are started to be driven in step S4 immediately after the reverse drive and stop of the take-out motor are performed. By providing an appropriate delay between them, the size of the gap between the bills P can be set.
[0094]
Of course, if the leading edge of the bill P is detected in step S5 and then the take-out motor 41 and the pickup motor 49 are started to be driven with an appropriate delay, the control of “constant pitch picking” that makes the pitch of the leading end of the bill P constant. Is also possible.
[0095]
In the control method shown in FIG. 11, the distance from the pickup roller 5 to the transport roller 34 needs to be shorter than the length of the bill P in the feeding direction (short direction). This is because it is necessary for the bill P to always have a force for feeding the bill P. However, when the length in the short direction differs depending on the type of the bill as in the bill, the arrangement of the rollers with respect to the shortest bill P is determined considering the long bill P, and the brake action of the pickup roller 5 is long. There are many things that continue to be bad. In order to bring the pickup roller 5 and the transport roller 34 close to each other, it is necessary to reduce the diameter of each roller or arrange the rollers in a nested manner.
[0096]
In order to improve the contact state with respect to the banknote P and ensure the gripping force, the roller needs to have a certain diameter. In order to nest the rollers, it is necessary to reduce the width of the rollers, which is also a problem for obtaining a gripping force.
[0097]
Moreover, since the length of the longitudinal direction of the banknote P also changes with banknotes, in order to take out with the same tray, it is necessary to bring a roller to the center. Furthermore, considering the force in the direction of taking out the banknote P, it is considered better to arrange the rollers in the same phase as much as possible. When the diameter of the take-out roller 30 and the pickup roller 5 is 35 mm to 40 mm and the diameter of the transport roller 34 is 20 mm to 30 mm, when the rollers are arranged in a row, the diameter is 52.5 mm to 75 mm. When the length of the bill in the feeding direction is about 60 mm, it is difficult to perform a stable take-out operation in consideration of the contact length of each roller.
[0098]
Further, in the case of the bill P having a short length in the feeding direction, when the leading edge of the bill P is detected by the second detection sensor 77, the condition that the trailing edge of the bill P is applied to the pickup roller 5 is more severe. The stoppage of the second is delayed, and the second sheet is fed in, so that it is easy for a slippage to occur.
[0099]
Next, a second control method of the bill removal operation will be described with reference to the flowchart shown in FIG. Note that this second control method considers the bill P having a short length in the feeding direction, and is disposed between the take-out roller 30 and the drive roller 34 in addition to the second detection sensor 77. The first detection sensor 76 is used. That is, the second control method can stably perform the take-out operation even if the distance between the pickup roller 5 and the transport roller 34 is longer than the length of the bill P in the feeding direction (short direction).
[0100]
That is, when the start of the taking-out operation of the banknote P is requested (step S1), the controller 85 performs the control up to step S4 in order to feed out the first banknote P as in the flowchart shown in FIG. Then, the take-out roller 30 and the pickup roller 5 are rotated.
[0101]
Subsequently, the controller 85 determines whether or not the leading edge of the first banknote P has been detected past the take-out roller 30 based on the output signal from the first detection sensor 76 (step S21). When the controller 85 determines that the leading edge of the banknote P has been detected (step S21, YES), the controller 85 stops only the drive of the pickup motor 49 and stops the rotation of the pickup roller 5 (step S22). At this time, the banknote P is conveyed only by the conveying force of the take-out roller 30. The first banknote P receives resistance from the stopped pickup roller 5, but the first banknote P continues to be transported because the transport force of the take-out roller 30 is greater.
[0102]
Subsequently, the controller 85 determines whether or not the leading edge of the first banknote P is detected based on the output signal from the second detection sensor 77 (step S23). When the controller 85 determines that the leading edge of the banknote P has been detected (step S23, YES), the controller 85 stops driving the take-out motor 41 and stops the take-out roller 30 from rotating (step S24). At this time, the bill P is transported only by the transport force of the transport roller 34.
[0103]
Subsequently, the controller 85 determines whether or not the rear end of the first banknote P has been detected based on the output signal from the first detection sensor 76 (step S25). If the controller 85 determines that the trailing edge of the banknote P has been detected (step S25, YES), the controller 85 drives the take-out motor 41 in reverse rotation (step S31). Thereby, the take-out roller 30 is rotated in the reverse direction. Further, the reverse rotation roller 31 is rotated in the reverse direction with the reverse rotation of the take-out roller 30.
[0104]
The controller 85 controls the drive of the take-out motor 41 to rotate the take-out roller 30 by a predetermined angle, and then stops the drive of the take-out motor 41 (step S32).
[0105]
Subsequently, based on the output signal from the banknote detection sensor S, the controller 85 determines whether or not the banknote P to be taken out is in the tray (step S26). If the controller 85 determines that there is a bill P (step S26, YES), the controller 85 returns to step S4 with an appropriate delay after stopping the take-out roller 30, and restarts the drive of the take-out motor 41 and the pickup motor 49. Then, the second banknote P is taken out.
[0106]
If the controller 85 determines that there is no banknote P in the tray (step S26, NO), the controller 85 stops driving the reverse rotation motor 64 and stops the reverse rotation roller 31 (step S27). Thereafter, the controller 85 stops the drive of all the motors, and the take-out operation ends (step S28).
[0107]
With this second control method, the distance between the pickup roller 5 and the transport roller 34 can be secured sufficiently large even when the banknote P having the shortest length in the feeding direction is processed. Further, by detecting the rear end of the banknote P by the first detection sensor 76, the second sheet can be taken out at a faster stage.
[0108]
Thereby, in the “fixed gap takeout”, the gap between the bills can be made smaller and the processing speed can be increased. Further, also in the “constant pitch picking”, it is possible to reduce the picking pitch of the leading edge of the bill. In addition to reducing the gap and pitch, it is also possible to make the motor start-up slower.
[0109]
In the second control method according to this embodiment, the trailing edge of the bill P is detected by the first detection sensor 76. However, when there is no request for increasing the processing speed, the second detection sensor 77 is used. Then, the trailing edge of the bill P may be detected and the next bill P may be taken out.
[0110]
In the second control method according to this embodiment, the reverse rotation roller 31 is reversely rotated at the timing when the rear end of the banknote P is detected by the first detection sensor 76. However, there is a request for increasing the processing speed. If not, the reverse rotation roller 31 may be rotated reversely at the timing when the second detection sensor 77 detects the trailing edge of the bill P, and after the stop, the next bill P may be taken out.
[0111]
The control method described with reference to FIGS. 11 and 12 is difficult to implement in the conventional gate roller type extraction operation, and is easy to implement in MRR extraction. In the MRR take-out, the pressing force of the banknote P against the pickup roller 5 can be reduced, and the feeding force by the take-out roller 30 of the separation unit can be expected. In the gate roller system or the like, since the resistance of the separating portion is large, the banknote P must be sent by the pickup roller 5, and the pressing force of the banknote on the pickup roller 5 needs to be increased to some extent. In the case of banknotes, the necessary pressing force is about 5N.
[0112]
In comparison with this, in the MRR take-out, the take-out roller 30 and the reverse rotation roller 31 rotate in the separation unit, so that the biting force and reverse rotation torque on the banknote P are kept constant, and a stable conveying force can be ensured. Thereby, the pressing force of the banknote P with respect to the pick-up roller 5 should just be the grade which guide | leads the front-end | tip of the banknote P to a separation part, and may be about 1-2N.
[0113]
In the gate roller system, the take-out roller 30 rotates, but the gate roller is fixed, and there is not much difference between the two friction coefficients. Therefore, the force for feeding the banknote P to the separation unit cannot be expected. On the other hand, in MRR extraction, the torque is set so that a tangential force smaller than the frictional force between the extraction roller 30 and the banknote P and larger than the frictional force between the banknote P and the banknote P is generated.
[0114]
For this reason, in the separating unit, a force for feeding one or two overlapping first banknotes is stably generated. For this reason, in MRR take-out, the control method shown in FIGS. 11 and 12 enables stable take-out regardless of the size of the banknote P from the viewpoint of roller layout, motor startup, and processing capability.
[0115]
In the first and second control methods according to the above-described embodiments, the take-out roller is reversely rotated every time a bill is taken out, but is reversely rotated every predetermined number of sheets, that is, every time n sheets are processed. Also good.
[0116]
That is, the third control method of the bill removal operation will be described with reference to the flowchart shown in FIG. This third control method is performed using only the second detection sensor 77 arranged on the carry-out side of the drive roller 34 and the pinch roller 35.
[0117]
As shown in FIG. 13, when the start of the taking-out operation of the banknote P is requested (step S1), the controller 85 proceeds to step S4 in order to pay out the first banknote P as in the flowchart shown in FIG. And when the leading edge of the banknote P is detected based on the output signal from the second detection sensor 77 in step S5 after the take-out roller 30 and the pickup roller 5 are rotated, the take-out motor 41 in step S6. And the drive of the pick-up motor 49 is stopped and it is judged whether the trailing end of the banknote P was detected based on the output signal from the 2nd detection sensor 77 in step S7.
[0118]
Subsequently, when the controller 85 determines that the trailing edge of the banknote P is detected based on the output signal from the second detection sensor 77 (step S7, YES), the number of processed banknotes P is the predetermined number n. It is determined whether or not the number of sheets has been reached (step S33). That is, the controller 85 determines whether or not the rear end of the nth banknote P has been detected based on the output signal from the second detection sensor 77.
[0119]
The controller 85 reversely drives the take-out motor 41 based on the detection of the rear end of the conveyed nth banknote P (step S33, YES) (step S31). Thereby, the take-out roller 30 is rotated in the reverse direction. Further, the reverse rotation roller 31 is rotated in the reverse direction with the reverse rotation of the take-out roller 30.
[0120]
The controller 85 controls the drive of the take-out motor 41 to rotate the take-out roller 30 by a predetermined angle, and then stops the drive of the take-out motor 41 (step S32).
[0121]
Subsequently, the controller 85 determines based on the output signal from the banknote detection sensor S whether or not the banknote P to be taken out is in the tray (step S8). If the controller 85 determines that there is a bill P (step S8, YES), the controller 85 returns to step S4 with an appropriate delay after stopping the take-out roller 30, and restarts the drive of the take-out motor 41 and the pickup motor 49. Then, the next bill P is taken out.
[0122]
If the controller 85 determines that there is no banknote P on the tray (step S8, NO), the controller 85 stops driving the reverse rotation motor 64 and stops the reverse rotation roller 31 (step S9). Thereafter, the controller 85 stops the driving of all the motors, and the take-out operation ends (step S10).
[0123]
On the other hand, if the controller 85 does not detect the trailing edge of the n-th banknote P conveyed in step S33 (step S33, NO), the banknote to be taken out based on the output signal from the banknote detection sensor S. It is determined whether or not P is in the tray (step S8). If it is determined that there is a bill P (YES in step S8), an appropriate delay is taken after stopping the take-out roller 30, and the process returns to step S4. If it is determined that there is no banknote P in the tray (step S8, NO), the drive of the reverse rotation motor 64 is stopped (step S9), and further, the drive of all the motors is stopped and the take-out operation ends ( Step S10).
[0124]
Thus, it is not necessary to perform the reverse rotation operation of the take-out roller 30 for each banknote P, and by performing it for every n sheets, it is possible to improve the processing efficiency while preventing uneven wear of the rollers. Become.
[0125]
Next, the 4th control method of banknote extraction operation | movement is demonstrated with reference to the flowchart shown in FIG.
[0126]
That is, as shown in FIG. 14, when the start of the operation of taking out the banknote P is requested (step S <b> 1), the controller 85 pays out the first banknote P as in the flowchart shown in FIG. 11. After performing the control up to step S4 and rotating the take-out roller 30 and the pickup roller 5, when the leading edge of the banknote P is detected based on the output signal from the second detection sensor 77 in step S5, the take-out is made in step S6. The drive of the motor 41 and the pickup motor 49 is stopped.
[0127]
Subsequently, the controller 85 determines whether or not the number of processed bills P has reached a predetermined number n (step S33). That is, the controller 85 determines whether or not the rear end of the nth banknote P has been detected based on the output signal from the first detection sensor 76.
[0128]
The controller 85 reversely drives the take-out motor 41 based on the detection of the rear end of the conveyed nth banknote P (step S33, YES) (step S31). Thereby, the take-out roller 30 is rotated in the reverse direction. Further, the reverse rotation roller 31 is rotated in the reverse direction with the reverse rotation of the take-out roller 30. Thereafter, the controller 85 stops driving the take-out motor 41 (step S32).
[0129]
Subsequently, the controller 85 determines based on the output signal from the banknote detection sensor S whether or not the banknote P to be taken out is in the tray (step S8). If the controller 85 determines that there is a bill P (step S8, YES), the controller 85 returns to step S4 with an appropriate delay, restarts the drive of the take-out motor 41 and the pickup motor 49, and the next bill P The take-out operation is performed.
[0130]
If the controller 85 determines that there is no banknote P on the tray (step S8, NO), the controller 85 stops driving the reverse rotation motor 64 and stops the reverse rotation roller 31 (step S9). Thereafter, the controller 85 stops the driving of all the motors, and the take-out operation ends (step S10).
[0131]
On the other hand, in step S33, when the controller 85 does not detect the trailing end of the conveyed nth banknote P (step S33, NO), based on the output signal from the second detection sensor 77, It is determined whether or not the rear end of the banknote P has been detected.
[0132]
Subsequently, when the controller 85 determines that the rear end portion of the banknote P has been detected (step S7, YES), whether or not the banknote P to be taken out based on the output signal from the banknote detection sensor S is in the tray. (Step S8), if it is determined that there is a bill P (step S8, YES), return to step S4 with an appropriate delay, and if it is determined that there is no bill P in the tray (step (S8, NO), the drive of the reverse rotation motor 64 is stopped (step S9), and further, the drive of all the motors is stopped and the take-out operation is completed (step S10).
[0133]
Thus, it is not necessary to perform the reverse rotation operation of the take-out roller 30 for each banknote P, and by performing it for every n sheets, it is possible to improve the processing efficiency while preventing uneven wear of the rollers. Become.
[0134]
Next, a fifth control method of the bill removal operation will be described with reference to the flowchart shown in FIG.
[0135]
That is, as shown in FIG. 15, when the start of the taking-out operation of the banknote P is requested (step S <b> 1), the controller 85 takes out the first banknote P in the same manner as the flowchart shown in FIG. 12. The control from step S4 is performed, and the control from step S21 to step S25 is continued.
[0136]
Subsequently, the controller 85 determines whether or not the rear end of the nth banknote P has been detected based on the output signal from the first detection sensor 76 (step S34).
[0137]
The controller 85 reversely drives the take-out motor 41 based on the detection of the trailing end of the nth banknote P conveyed (step S34, YES) (step S31). Thereby, the take-out roller 30 is rotated in the reverse direction. Further, the reverse rotation roller 31 is rotated in the reverse direction with the reverse rotation of the take-out roller 30. Thereafter, the controller 85 stops driving the take-out motor 41 (step S32).
[0138]
Subsequently, based on the output signal from the banknote detection sensor S, the controller 85 determines whether or not the banknote P to be taken out is in the tray (step S26). When the controller 85 determines that there is a bill P (step S26, YES), the controller 85 returns to step S4 with an appropriate delay, restarts the driving of the take-out motor 41 and the pickup motor 49, and the next bill P The take-out operation is performed.
[0139]
If the controller 85 determines that there is no banknote P in the tray (step S26, NO), the controller 85 stops driving the reverse rotation motor 64 and stops the reverse rotation roller 31 (step S27). Thereafter, the controller 85 stops the drive of all the motors, and the take-out operation ends (step S28).
[0140]
On the other hand, when the controller 85 does not detect the trailing edge of the nth bill P conveyed in step S34 (step S34, NO), the bill is taken out based on the output signal from the bill detection sensor S. It is determined whether or not P is in the tray (step S26). If it is determined that there is a bill P (YES in step S26), an appropriate delay is taken to return to step S4, and there is no bill P in the tray. (Step S26, NO), the drive of the reverse rotation motor 64 is stopped (step S27), and further, the drive of all the motors is stopped and the take-out operation is finished (step S28).
[0141]
Thus, it is not necessary to perform the reverse rotation operation of the take-out roller 30 for each banknote P, and by performing it for every n sheets, it is possible to improve the processing efficiency while preventing uneven wear of the rollers. Become.
[0142]
As described above, in the first to fifth control methods, the take-out roller is rotated in reverse according to the bill take-out operation. When the take-out roller is not rotated in the reverse direction, when the separation and take-out operation of the banknote P is repeatedly performed, a minute sliding friction is generated between the banknote P and the reverse rotation roller 31, and the rubber surface of the reverse rotation roller 31 is eventually worn out. Actually, when the state of FIGS. 5 and 6 is repeated in small increments every time a bill P is taken out, the reverse rotation roller 31 also rotates in vibration to prevent uneven wear.
[0143]
Further, when only one sheet enters between the take-out roller 30 and the reverse roller 31, the reverse roller 31 is rotated as shown in FIG. 4, thereby preventing uneven wear.
[0144]
However, since the banknote separation processing machine shown in FIG. 1 processes a large number of banknotes of several hundred thousand per day, in the process in which the reverse rotation roller is worn, if the wear is concentrated on a certain part on the circumference, it will be uneven. Wear occurs. Once uneven wear occurs, the reverse rotation roller 31 can no longer rotate vibrationally, and the uneven wear is accelerated and proceeds. As a result, separation becomes impossible, and stable extraction cannot be maintained in MRR extraction.
[0145]
On the other hand, in the control method according to the above-described embodiment, the separation roller is forcibly shifted by rotating the reverse rotation roller in the reverse direction. Thus, it is possible to perform a stable take-out operation. Therefore, it is possible to greatly reduce the replacement frequency of the reverse rotation roller.
[0146]
As described above, according to the paper sheet take-out device according to this embodiment, the separation roller is brought into pressure contact with the take-out roller, and a torque in a direction opposite to the paper take-out direction is applied to the separation roller. Separate leaves. For this reason, it is possible to take out stably without being affected by the thickness of the paper sheet and the friction coefficient, and separation is possible if the friction coefficient between the separation roller and the paper sheet is higher than the friction coefficient between the paper sheets. It becomes. Therefore, the material of the roller should be selected only from the viewpoint of durability, and the range of selection is widened.
[0147]
Further, a line segment connecting the center of the take-out roller and the center of the separation roller is orthogonal to the line segment connecting the contact portion of the delivery roller with which the paper sheet is contacted and the contact portion of the take-out roller and the separation roller. Each roller is arranged as described above. For this reason, the feeding direction of paper sheets and the taking-out direction can be made to correspond. Therefore, the paper sheets fed out by the feeding roller are smoothly fed between the take-out roller and the separation roller, and the paper sheets separated and pulled back by the separation roller are also smoothly pulled back, so that more stable take-out can be performed. Is possible.
[0148]
In addition, each roller is set so that the line segment connecting the center of the take-off roller and the center of the separation roller is orthogonal to the line segment connecting the center of the separation roller and the rotation center of the swing lever that swings the separation roller. Is arranged. For this reason, the pressing force of the separation roller against the take-out roller can be kept constant, and a stable separation force can be obtained.
[0149]
Further, a first detection sensor is disposed immediately after the take-out roller, and a second detection sensor is disposed immediately after the transport roller. Based on the output signals from the first detection sensor and the second detection sensor, the driving of the delivery roller and the take-out roller is controlled. For this reason, it becomes possible to take out one by one stably and reliably without sacrificing the diameter and layout of each roller regardless of the difference in length, thickness, and friction coefficient in the conveying direction.
[0150]
Still further, based on the output signals from the first detection sensor and the second detection sensor, the driving of the delivery roller and the take-out roller is controlled, and the take-out roller and the separation roller are rotated in reverse every predetermined number of sheets. Thereby, on the circumference of the separation roller, a specific portion does not concentrate and wear, and it is possible to prevent uneven wear of the roller. Therefore, it is possible to perform the take-out operation stably over a long period of time, and it is possible to greatly reduce the replacement frequency of the separation roller.
[0151]
【The invention's effect】
As described above, according to the present invention, paper sheets that can be taken out one by one stably over a long period of time without being affected by the thickness, friction coefficient, and length of the paper sheets. An extraction device can be provided.
[Brief description of the drawings]
FIG. 1 is a diagram schematically showing a configuration of a banknote sorting processor to which a paper sheet take-out device according to an embodiment of the present invention is applied.
FIG. 2 is a perspective view schematically showing a structure of a banknote removing device as a paper sheet taking out device applied to the banknote separating and processing machine shown in FIG. 1;
FIG. 3 is a diagram showing a rotation state of a take-out roller and a reverse rotation roller that constitute a separation mechanism of the banknote take-out device shown in FIG. 2;
FIG. 4 is a diagram illustrating a state in which one banknote is fed between a take-out roller and a reverse rotation roller.
FIG. 5 is a diagram illustrating a state in which two banknotes are fed between a take-out roller and a reverse rotation roller.
FIG. 6 is a diagram illustrating a state in which bills fed between a take-out roller and a reverse rotation roller are separated.
7 is a front view showing an arrangement configuration of each roller constituting the separation mechanism of the banknote take-out device shown in FIG. 2. FIG.
FIG. 8 is a side view showing an arrangement configuration of each roller constituting the separation mechanism shown in FIG. 7;
FIG. 9 is a front view showing a contact state between the take-out roller and the reverse rotation roller.
FIG. 10 is a side view showing a contact state between the take-out roller and the reverse rotation roller shown in FIG. 9;
FIG. 11 is a flowchart for illustrating a first control method applied to the paper sheet takeout device according to the embodiment of the present invention;
FIG. 12 is a flowchart for illustrating a second control method applied to the paper sheet take-out device according to the embodiment of the present invention.
FIG. 13 is a flowchart for explaining a third control method applied to the paper sheet takeout device according to the embodiment of the present invention;
FIG. 14 is a flowchart for explaining a fourth control method applied to the paper sheet takeout device according to the embodiment of the present invention;
FIG. 15 is a flowchart for explaining a fifth control method applied to the paper sheet takeout device according to the embodiment of the present invention;
[Explanation of symbols]
P ... bills (paper sheets), 5 ... pick-up roller (delivery roller), 30 ... take-out roller, 31 ... reverse rotation roller (separation roller), 34 ... drive roller (conveyance roller), 35 ... pinch roller (conveyance roller), 63a, 63c ... pulley, 63b ... belt, 64 ... reverse motor (drive means), 76 ... first detection sensor (first detection means), 77 ... second detection sensor (second detection means), 85 ... controller (control) means).

Claims (5)

A delivery roller for delivering paper sheets;
A take-out roller having a peripheral surface formed of rubber and taking out the paper sheet fed by the feed roller;
A separation roller that is pressed against the take-out roller and is formed of rubber on the entire circumference for separating the paper sheets one by one by applying a rotational torque in a direction opposite to the take-out direction of the paper sheets;
A transport roller for transporting the paper sheet taken out by the take-out roller;
Detecting means for detecting paper sheets carried out by the conveying roller;
Every time the detecting means detects the rear end of each sheet, and a control means for stopping by reverse rotating the take-out roller,
A paper sheet take-out device comprising: A delivery roller for delivering paper sheets;
A take-out roller having a peripheral surface formed of rubber and taking out the paper sheet fed by the feed roller;
A separation roller that is pressed against the take-out roller and is formed of rubber on the entire circumference for separating the paper sheets one by one by applying a rotational torque in a direction opposite to the take-out direction of the paper sheets;
Detection means for detecting paper sheets taken out by the take-out roller;
Each time the detection means detects the rear end of each paper sheet, the control means for rotating the take-out roller in reverse to stop it,
A paper sheet take-out device characterized by comprising: A delivery roller for delivering paper sheets;
A take-out roller having a peripheral surface formed of rubber and taking out the paper sheet fed by the feed roller;
A separation roller that is pressed against the take-out roller and is formed of rubber on the entire circumference for separating the paper sheets one by one by applying a rotational torque in a direction opposite to the take-out direction of the paper sheets;
A transport roller for transporting the paper sheet taken out by the take-out roller;
Detecting means for detecting paper sheets carried out by the conveying roller;
Control means for reversely rotating the take-out roller each time the detection means detects a rear end portion of predetermined n sheets of paper,
A paper sheet take-out device characterized by comprising: A delivery roller for delivering paper sheets;
A take-out roller having a peripheral surface formed of rubber and taking out the paper sheet fed by the feed roller;
A separation roller that is pressed against the take-out roller and is formed of rubber on the entire circumference for separating the paper sheets one by one by applying a rotational torque in a direction opposite to the take-out direction of the paper sheets;
Detection means for detecting paper sheets taken out by the take-out roller;
Control means for reversely rotating the take-out roller each time the detection means detects a rear end portion of predetermined n sheets of paper,
A paper sheet take-out device characterized by comprising: 5. The sheet take-out device according to claim 1, wherein the control unit reversely rotates the take-out roller by a predetermined angle that is not divisible by 360 degrees .

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