JPH07172629A - Paper sheet housing and delivering device - Google Patents

Abstract

PURPOSE:To prevent delivery failure of a paper sheet, and attain stable delivery operation by controlling voltage to be impressed on a DC motor to drive a separating roller in the paper sheet housing direction by detecting a carrying condition of the paper sheet delivered by a housing and delivering roller. CONSTITUTION:A device to house and deliver a paper sheet, for example, paper money raises the paper money housed in an accumulating part 2 by an elevator part 9, and kicks it out to a carrying passage 1 by a kicking-out roller 6. The paper money is housed and delivered by a housing and delivering roller 3, a feed roller 4 and a separating roller 5. The rollers 3 and 4 are each driven by the same driving part 7. In this constitution, the separating roller 5 is driven by an exclusive DC motor 8, and this rotational direction is detected by a rotary encoder 13. On the other hand, respective sensors 10 and 11 to respectively detect duplicate feed and a carrying interval of the paper money are arranged in the carrying passage 1. Impression voltage on the DC motor 8 is controlled according to respective detecting results of the respective sensors 10 and 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper sheet storage / feeding device, and more particularly to a separation roller capable of feeding paper sheets in a stable state.

[0002]

2. Description of the Related Art Conventionally, the present applicant has previously proposed, as a paper sheet storage and feeding device of this type, the one disclosed in Japanese Patent Application No. 4-257001. A paper sheet storage / feeding device shown in this application conveys paper sheets in a storage direction in which the paper sheets are taken into a stacking unit, and at the time of feeding, transports paper sheets in the stacking unit in a forward / reverse rotatable storage / feeding roller. A separating roller which is provided at a position facing the storing and feeding roller and in contact with a peripheral surface thereof and which can rotate in the forward and reverse directions; and a drive transmission mechanism section which transmits the driving force of the driving unit to the storing and feeding roller and the separating roller, respectively. And have.

In the drive transmission mechanism constructed as described above, the storage section feeding roller and the separating roller are rotated in the paper sheet storage direction at the time of storage by the drive of the drive section, and at the same time, the storage sheet delivery is carried out. The roller and the separation roller are rotated in the paper sheet feeding direction, and the transmission path of the driving force to the separation roller is switched based on the difference between the torque of the storage feeding roller and the torque of the separation roller during feeding. I am trying. That is, the drive transmission mechanism section is provided with a drive switching means (torque limiter) inside thereof, and by this drive switching means, at the time of normal feeding, these storage feeding roller and separation roller are fed out. However, at this time, two sheets of paper are sandwiched between the storing and feeding roller and the separating roller, and a difference occurs in torque between the storing and feeding roller and the separating roller. When the torque difference exceeds a certain value, the transmission path of the driving force from the drive unit to the separation roller is cut off, and the other transmission path for transmitting the driving force in the opposite direction is connected. One of the double-fed paper sheets is returned to the stacking portion by rotating in the storage direction which is the opposite direction.

[0004]

SUMMARY OF THE INVENTION By the way, in a paper sheet storage / feeding device in which the above-mentioned delivery / storage roller and separation roller are arranged so as to face each other and come into contact with each other, the torque difference between these delivery / storage roller and separation roller is large. The drive transmission mechanism section that determines the rotation direction of the separation roller based on the above requires at least two drive force transmission paths from the drive section, which complicates the overall configuration and increases the number of parts accordingly. There's a problem.

In order to solve such a problem, for example, the storing and feeding roller and the separating roller are respectively driven by separate driving units, and such a driving unit drives the storing and feeding roller in the feeding direction at the time of feeding. The driving force is applied to the separating roller in the storing direction lower than that of the storing and feeding roller, so that the storing and feeding roller is moved in the feeding direction in the normal feeding of one sheet. In addition to rotating, the separation roller is also driven by the storage and feeding roller to rotate in the feeding direction. Then, at the abnormal time when the paper sheets fed out at this time are double-fed, since the frictional force between the doubled paper sheets is small, the force for driving the separation roller transmitted from the storing and feeding roller is driven. Becomes smaller than the driving force for rotating the separation roller in the storage direction, which is transmitted from the drive unit dedicated to the separation roller, whereby the separation roller is rotated in the storage direction and double-fed One piece is returned to the collection department.

However, even if each of the storage and delivery rollers and the separation roller is driven by such an individual drive unit, for example, if the drive force of the drive unit that drives the separation roller is small at the time of delivery, the separation roller is separated. Is rotated by the storing and feeding roller that comes into contact therewith, and the paper sheets in the stacking unit are conveyed in series, or a plurality of paper sheets are fed out while overlapping each other, and, conversely, drives the separation roller. If the driving force is too large, the separating roller is rotated in the storing direction, which is opposite to the storing and feeding roller that is rotated in the feeding direction, which makes it difficult to feed the paper sheets in the stacking unit. There was a problem that it was difficult.

According to the present invention, the driving force of the separating roller at the position facing and contacting the storage / feeding roller can be freely set, thereby preventing double feeding or feeding failure of the fed paper, An object of the present invention is to provide a paper sheet storage / feeding device that can perform a stable feeding operation and can also simplify the entire configuration.

[0008]

In order to achieve the above object, in the first aspect of the invention, a paper is provided at a position facing the storage / delivery roller and its peripheral surface is in contact with the storage / delivery roller. It has a separation roller for adjusting the conveyance state of the leaves, and the storage / feeding roller is driven in either the paper-sheet storing direction or the paper-sheet feeding direction so that the paper-sheets are stored and fed. In the paper sheet storage / feeding device, a DC motor that applies a driving force to the separation roller in the paper sheet storage direction, and a state detection sensor that detects a transport state of the paper sheet delivered by the storage / delivery roller. And a control unit for controlling the drive voltage applied to the DC motor based on the detection signal of the state detection sensor.

According to a second aspect of the present invention, in the first aspect, the control section varies the driving force of the DC motor by controlling the application time of the driving voltage applied to the DC motor.

According to a third aspect of the present invention, in the first aspect of the present invention, as the state detection sensor, a double feed detection sensor for detecting double feed of paper sheets and a conveyance interval detection for detecting a conveyance interval of paper sheets. When a double feed of the sheet is detected based on the detection signal of the double feed detection sensor, the control unit is provided with a sensor, and the interval between the sheets is determined in advance based on the detection signal of the conveyance interval detection sensor. When it is detected that the interval is shorter than the set interval, the drive voltage of the DC motor is increased by a predetermined value, the changed voltage is set as a new drive voltage, and the paper sheet is detected based on the detection signal of the conveyance interval detection sensor. If it is detected that the interval is longer than the preset interval, D
The driving voltage of the C motor is lowered by a predetermined value, and the changed voltage is set to a new driving voltage.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the rotary encoder has a rotary encoder for detecting the rotation direction of the separation roller, and the control section stores and unwinds the storage voltage when the drive voltage applied to the DC motor is initially set. While rotating the roller in the feeding direction, the driving voltage applied to the DC motor is stepwise increased from the minimum voltage by a predetermined value to give a driving force to the separating roller in the paper sheet storage direction. When the rotary encoder detects that the driving force of the DC motor is larger than the driven power transmitted from the storing / feeding roller through the paper sheets and the separating roller is reversed from the feeding direction to the storing direction. In addition, a voltage smaller than the drive voltage applied to the DC motor when the rotation direction is reversed by a predetermined value is set as the optimum drive voltage.

[0012]

According to the first aspect of the invention, a DC motor for applying a driving force to the separation roller in the paper sheet storage direction, a state detection sensor for detecting the conveyed state of the fed paper sheet, and a state detection sensor And a control unit that controls the drive voltage applied to the DC motor based on the detection signal of the state detection sensor. Therefore, the control unit controls the drive voltage applied to the DC motor based on the detection signal of the state detection sensor. The drive voltage of the DC motor can be set so that there is no double feed and the conveyance interval is optimum. Further, in the first aspect of the present invention, by controlling the drive voltage applied to the DC motor, stable feeding of the paper sheets is possible, and the torque limiter is used as in the conventional case, and the torque of the feeding storage roller and the separation roller is controlled. Since the rotation direction of the separation roller is not determined based on the difference, it is not necessary to strictly determine the interval between the feeding storage roller and the separation roller, and it is possible to prevent the overall configuration from becoming complicated. Further, in the first aspect of the present invention, by appropriately changing the control content of the control unit, the rotational force of the separation roller in the storage direction can be set to an optimum value, and the rotational force can be easily set. it can.

In the second aspect of the invention, the control section controls the application time of the drive voltage of the DC motor based on the detection signal of the state detection sensor, thereby varying the drive force of the DC motor. Similar to the invention of 1, the paper sheets can be delivered in a stable state.

According to the third aspect of the present invention, when the control unit detects the double feed of the paper sheets based on the detection signal of the double feed detection sensor, the inter-paper sheets are detected based on the detection signal of the conveyance interval detection sensor. When it is detected that the interval of is shorter than a preset interval, the drive voltage of the DC motor is increased by a predetermined value and the changed voltage is set to a new drive voltage.
When it is detected that the interval between the paper sheets is longer than the preset interval based on the detection signal of the conveyance interval detection sensor,
Since the drive voltage of the DC motor is lowered by a predetermined value and the changed voltage is set to a new drive voltage, such D
The drive voltage for the C motor can be appropriately set and changed according to the conveyance state of the paper sheets, whereby the paper sheets can be fed out without double feeding and with an optimum conveyance interval.

According to the fourth invention, the DC is controlled by the control unit.
At the time of initial setting of the drive voltage applied to the motor, the storage delivery roller is rotated in the delivery direction, and the drive voltage applied to the DC motor is stepwise increased from the minimum voltage by a predetermined value, so that the separation roller receives the paper. A driving force is applied in the storage direction of the leaves, and at this time, the driving force of the DC motor becomes larger than the driven power transmitted from the storage / delivery roller via the paper sheets, and the separation roller moves from the delivery direction to the storage direction. When it is detected by the rotary encoder that the motor has been reversely rotated, the voltage that is a predetermined value smaller than the drive voltage applied to the DC motor when the rotation direction is reversed is set as the optimum drive voltage. At the time of feeding after setting, if the paper sheets are fed in one sheet normally, the separation roller is driven by the storage feeding roller via the paper sheets. When a double-fed paper sheet is pinched between the separating roller and the separating roller, the friction between the storing and feeding roller and the separating roller becomes small, and the rotation direction of the separating roller is the feeding direction. It is possible to return one sheet of the double-fed paper sheets by reversing from the storage direction to the storage direction. That is, in the fourth aspect of the invention, the double feed occurs at the time of feeding, and the frictional force between the storage feeding roller and the separating roller is slightly reduced, so that the rotation direction of the separating roller driven by the feeding direction is changed. It can be reversed directly from the feeding direction to the storage direction.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, referring to FIG. 1, the overall structure of the bill storing and feeding device in the bill depositing / dispensing machine will be explained.
It is a transport path for transporting one by one at regular intervals, and the end of this transport path 1 is connected to a stacking unit 2 in which deposited banknotes are reused as dispensed banknotes. Further, in the transport path 1 near the stacking unit 2, a storage / delivery roller 3, a feed roller 4, and a separation roller 5 which can rotate in the forward and reverse directions in a storage direction for storing a deposited banknote and a delivery direction for delivering a dispensed banknote are provided. Further, at the upper position of the stacking unit 2, a kicking roller 6 for kicking the banknotes stored in the stacking unit 2 to the transport path 1 is provided. A high friction member is provided on the peripheral surfaces of these rollers 3 to 6, and the storage and delivery roller 3 and the feed roller 4 and the storage and delivery roller 3 and the separation roller 5 are provided in such a positional relationship that their peripheral surfaces are in contact with each other. ing.

The storage feeding roller 3, the feeding roller 4, and the kicking roller 6 are driven by the same drive unit 7, and the storage unit for storing the deposit banknote indicated by the arrow (a) by the drive unit 7. Direction, the driving force for rotating the rollers 3, 4, and 6 is applied in the payout direction for paying out the dispensed banknote indicated by the arrow (b), so that when the banknote is paid out, the kick-out roller 6 causes the collecting roller 6 to move. The banknotes therein are kicked out to the transport path 1, and the storage feeding roller 3 and the feed roller 4 sandwich the banknotes fed by the kicking roller 6 and feed the bills in the payout direction along the transport path 1. Further, when the banknotes are stored, the deposited banknotes are sandwiched between the storage feeding roller 3 and the feeding roller 4 and fed into the stacking unit 2. Further, the bills fed from the stacking unit 2 are transported by a transporting unit (not shown) that constitutes the transport path 1 having a higher transport speed, so that a predetermined interval is provided.

The separating roller 5 is driven by a DC (direct current) motor 8 which is a dedicated driving unit, and the DC motor 8 drives the banknotes in the stacking unit 2 in a direction to be stored. A driving force (that is, a driving force in the direction of the arrow (C)) is applied, so that at the time of storing the banknotes, while sandwiching the deposited banknotes between the banknotes and the storing and feeding roller 3, the banknotes are fed to the stacking unit 2. At the time of paying out the bills, if the bills fed out by the kicking roller 6 are double-fed, one of the two bills is returned to the stacking unit 2 (details will be described later).

Inside the stacking unit 2, there is provided an elevator unit 9 which is capable of stacking and stacking banknotes on the upper surface and moving up and down. The elevator 9 is positioned so that a certain space is formed between the roller 6 and the upper surface of the bill on the elevator 9 with respect to the kick-out roller 6 as shown in FIG. The contact is made with a constant pressure.

In the middle of the transport path 1, a double feed detection sensor 10 for detecting double feed of a bill based on the amount of transmitted light, and a feed interval detection sensor 11 for detecting ON / OFF of light blocked by the bill. The detection signals of these sensors 10 and 11 are both output to the CPU 15 (described later). And this CP
In U15, the amount of transmitted light detected by the double feed detection sensor 10 is compared with a predetermined threshold value, and when the amount of transmitted light detected by the double feed detection sensor 10 is smaller than the threshold value, the bill Is determined to be double feed, and the ON time for detecting light by the conveyance interval detection sensor 11 and the OFF time when the light is blocked by the bill are measured, and based on these ON time and OFF time, The conveyance interval is detected (described later).

Further, the DC motor 8 has
Encoder 1 that detects the rotation direction of the output shaft of
3 is provided, and the rotation direction of the separation roller 5 (whether the rotation is in the feeding direction (d) or the storage direction (c)) is determined based on the output signal of the rotary encoder 13. There is.

Next, a functional block diagram for controlling the bill storing and feeding device will be described with reference to FIG. In FIG. 2, reference numeral 15 is a CPU. The CPU 15 includes a ROM 16 for storing the control contents of the bill storing and feeding device, the number of bills stored in the stacking unit 2, and a double feed detection sensor 10. A RAM 17 in which various data such as a threshold value of a transmitted light amount to be compared with the detected transmitted light amount and a time threshold value to be compared with an ON time detected by the conveyance interval detection sensor 11 is stored, and as described above. A drive unit 7 for driving the storing and feeding roller 3, the feed roller 4, and the kicking roller 6, a DC motor 8 for driving the separating roller 5, and a bill for detecting a bill conveyed along the conveyance path 1. Double feed detection sensor 10, conveyance interval detection sensor 11,
A rotary encoder 13 for detecting the rotation direction of the separation roller 5 is connected to each. Furthermore, CPU
15 is provided with a setting start switch 18 for starting a drive voltage initial setting (described later) and a feeding start switch 19 for starting a feeding operation (described later).

Next, the control contents of the CPU 15 will be described with reference to the flowchart of FIG. The flowchart shown in FIG. 3 is a preparatory flow for the drive voltage initial setting that is performed before the feeding operation (see FIG. 4) for feeding the banknotes from the stacking unit 2.

<< Step 1 >> Setting start switch 18
On the condition that is pressed, the drive unit 7 is driven to rotate the storage / delivery roller 3 in the delivery direction (b), and the DC motor 8 is driven to store the storage roller in the storage direction (ha). ) Is given the rotational force.

<< Step 2 >> The detection signal of the rotary encoder 13 is read and the rotation direction of the separation roller 5 is detected by this. When the setting start switch 18 is pressed, a preset minimum voltage (for example, a minimum value close to 0 [V]) is applied to the DC motor 8 so that the separation roller 5 moves in the feeding direction. (B)
It is driven by the storage and delivery roller 3 which is rotationally driven to rotate in the delivery direction indicated by the arrow (d). That is, in this step 2, the rotation of the separation roller 5 in the feeding direction (d) is detected. << Step 3 >> Based on the detection signal of the rotary encoder 13, it is determined whether or not the separating roller 5 is rotating in the arrow (d) direction which is the bill feeding direction, and the separating roller 5 is the bill feeding direction (d). If YES, the process proceeds to step 4, and if NO, the separating roller 5 is rotating in the bill storage direction (C), the process proceeds to step 5. At the start of the flow, the minimum voltage is applied to the DC motor 8 as described above, and the separation roller 5 is driven in the feeding direction (d), so that the process proceeds to step 4.

<< Step 4 >> The voltage applied to the DC motor 8 is increased by a predetermined value to increase the driving force of the separating roller 5 in the banknote storing direction (C) by one step, and then the process returns to Step 3 above. In this step 3, based on the detection signal of the rotary encoder 13, it is determined whether or not the separation roller 5 is rotating in the bill feeding direction (d). In this step 4, the voltage of the DC motor 8 is increased stepwise by a predetermined value from the preset minimum voltage so that the separating roller 5 gradually increases the driving force in the storage direction (C). To Further, the minimum voltage and the upper width of the applied voltage of the DC motor 8 to be increased in step 4 are stored in the RAM 17 in advance, and
The applied voltage of the DC motor 8 changed in step 4 is stored in the RAM 17 and is also stored in step 4
Rewrite every time you go through.

<< Step 5 >> In step 3, the separation roller 5 rotates in the storage direction (c) against the rotational force of the storage and supply roller 3 in contact with the separation roller 5 in the supply direction (b). If it is determined that it has been done, in step 5, D
The value of the voltage applied to the C motor 8 is determined. That is, in this step 5, the optimum applied voltage of the DC motor 8 in the feeding operation performed after the initial setting of the drive voltage (the flow of FIG. 3) is applied to the applied voltage stored in the RAM 17 in step 4 one step before. (Hereinafter, referred to as a drive voltage), and this drive voltage is newly set in the RAM 17.

<< Step 6 >> After stopping the driving of the drive unit 7 and the DC motor 8 described above, the present flow chart is terminated. Although the setting of the drive voltage for the DC motor 8 is started when the feeding start switch 18 is pressed, the setting is not limited to this and may be performed when the power is turned on. Further, the minimum voltage applied to the DC motor 8 and the upper width (predetermined value) for increasing the minimum voltage described in steps 2 and 4 can be arbitrarily changed.

Next, referring to the flowchart of FIG.
A bill payout operation performed after the flowchart of FIG. 3 will be described. This feeding operation is performed by the CP shown in FIG.
It is executed by U15. << Step 10 >> On condition that the feeding start switch 19 is pressed down, the elevator section 9 is lifted until the uppermost surface of the banknote placed on the upper surface thereof comes into contact with the kicking roller 6 with a predetermined force, and then stopped. In this state, the drive unit 7 is driven to rotate the storage feeding roller 3, the feeding roller 4, and the kicking roller 6 in the feeding direction (b), and thereby the bills in the stacking unit 2 are fed to the transport path 1. . Also, the drive unit 7
At the same time as driving the
The drive voltage set in step 3 is applied to apply a driving force to the separating roller 5 in the storing direction (c). At this time, the driven force of the storing and feeding roller 3 that contacts the separating roller 5 via the bills. However, since the driving force of the DC motor 8 in the storage direction (C) of the separation roller 5 is stronger, the separation roller 5 does not rotate in the storage direction (C) but rotates in the feeding direction (D). . The elevator 9 is moved up and down and stopped by sensor means (not shown) and elevator drive.
Further, when the feeding start switch 19 is pressed, the feeding number is inputted by the number input means (not shown).

<< Step 11 >> Double feed detection sensor 10
It is determined whether or not the bills dispensed through the transport path 1 are double-fed based on the transmitted light amount data of No. 2. If YES, the process proceeds to step 12 and double-fed. If no, go to step 13.

<< Step 12 >> In Step 11, since it is determined that the driving force of the DC motor 8 for driving the separating roller 5 in the storing direction (C) is small, and two banknotes are overlapped, the banknotes will be fed out as they are. In this step 12, DC is added in order to prevent such double feed failure.
The drive voltage applied to the motor 8 is increased by one step, which is a predetermined value. On the other hand, even when it is determined in step 14 (described later) that the conveyance interval of the banknotes is small, the drive voltage applied to the DC motor 8 is increased by one step in the storage direction (c) of the separation roller 5. The rotational force of is increased so that the conveyance interval of banknotes is returned to an appropriate value.

<< Step 13 >> When it is determined in step 11 that there is no double feeding of banknotes (N in step 11)
O), in this step 14, the interval (time t) between the banknotes is detected based on the detection signal output from the banknote interval detection sensor 11, and whether the interval (time t) between the banknotes is proper or not. To determine. That is, in this step 13,
Whether the detected banknote interval (time t) deviates from an appropriate value a and b stored in advance (however, a <
b) is determined, and as a result of this determination, the interval between banknotes (time t)
If YES is not between the proper values a and b, the process proceeds to step 14, and if the bill interval (time t) is NO between the proper values a and b, the process proceeds to step 17.

<Step 14> It is judged whether the bill interval (time t) is smaller than the proper value a or larger than the proper value b, and as a result, when the bill interval (time t) is smaller than the proper value a. When the bill interval (time t) is larger than the proper value b, the process proceeds to the next step 12,
Go to 5. Then, when the process proceeds to step 12 based on the determination result of step 14, in step 12, the drive voltage applied to the DC motor 8 is increased by one step as in the case of double feeding, and the bill Correct the transportation interval of.

<< Step 15 >> When it is determined in step 14 that the interval between bills (time t) is larger than the proper value b, in step 15, the drive voltage applied to the DC motor 8 is decreased by a predetermined value. Then, the rotational force of the separating roller 5 in the storing direction (C) is reduced by one step, whereby the conveyance interval of the banknotes is reduced and returned to an appropriate value.

<< Step 16 >> The drive voltage changed in Steps 12 and 15 (described later) is used in the RAM 17
Is updated and stored in, and based on the drive voltage after this change,
The DC motor 8 is driven to continue the bill feeding operation. << Step 17 >> It is determined whether or not all the bills of the number of fed-out sheets input in Step 10 have been fed out. If NO is not fed out yet, the process returns to the original Step 11 and if YES is already fed out. Then, this flowchart is finished. It should be noted that the number of delivered sheets is counted based on a detection signal from a counting sensor (not shown) provided in the middle of the transport path 1. In addition, in steps 13 and 14, it is determined whether or not the bill conveyance interval is appropriate. This is because if the bill conveyance interval is not proper, the number of fed bills is erroneously counted, and the bills are fed downstream. This is because the denomination correctness judgment unit provided may not be able to properly discriminate bills, or bills may come into contact with each other to cause a jam. Therefore, such a trouble is determined in steps 13 and 14. We try to prevent it based on the results.

As described in detail above, according to the bill storing and feeding device shown in this embodiment, as shown in the flowchart of FIG. 4, the double feed of the bill is detected based on the detection signal of the double feed detection sensor 10. If you do (YE in step 11)
S), and / or when it is detected that the interval between the bills is shorter than the preset interval based on the detection signal of the conveyance interval detection sensor 11 (step 14 small), the DC motor 8
The driving voltage of 1 is increased by one step, and the voltage which is increased by one step is set as a new driving voltage (step 12). Also, based on the detection signal of the conveyance interval detection sensor 11, the interval between bills is smaller than the preset interval. When a long time is detected (step 14 is large), the drive voltage of the DC motor 8 is lowered by one step, and the voltage lowered by one step is set as a new drive voltage (step 15). It is possible to pay out the bills in a stable manner without any gap and the feeding interval is optimal.

On the other hand, at the time of initial setting of the preceding stage of the above-mentioned bill feeding operation, as shown in the flowchart of FIG. 3, the storage feeding roller 3 is rotated in the feeding direction (b) (steps 1 and 2). , The driving voltage applied to the DC motor 8 is stepwise increased from the minimum voltage by a predetermined value, and a driving force is applied to the separating roller 5 in the banknote storing direction (C) (step 3 to step 4). DC rather than driven power transmitted from the storage / delivery roller 3 via a bill
When the rotary encoder 13 detects that the driving force of the motor 8 has increased and the separation roller 5 has been reversed from the feeding direction (d) to the storage direction (c) (NO in step 3), the rotation direction When a reverse rotation occurs, a voltage that is one step lower than the drive voltage applied to the DC motor 8 by a predetermined value is set as the optimum drive voltage (step 5 to step 6). In the above-described flow of FIG. 4, in the normal case where one bill is sent, the separating roller 5 is driven by the storing and feeding roller 3 via the bill, but the storing and feeding roller 3 and the separating roller 5 are separated from each other. When a double-fed banknote is pinched between them (when the frictional force between the storage feeding roller 3 and the separating roller 5 is small), the rotation direction of the separating roller 5 is from the feeding direction (d). How to store It reversed in (c), thereby making it possible to return a piece of double feed bills. That is, according to the banknote storing and feeding device shown in the present embodiment, double feeding occurs at the time of feeding and the frictional force between the storing and feeding roller 3 and the separating roller 5 is slightly reduced, and the storing and feeding roller 3 is Thus, the rotation direction of the separation roller 5 driven by the feeding direction (d) can be directly reversed from the feeding direction (d) to the storing direction (c), whereby stable bill feeding can be performed. Become.

When storing bills, the DC motor 8 is turned off.
It may be set to F or the DC motor 8 may be turned off and the connection of the driving force transmission system with the DC motor 8 may be disconnected so that the load is not applied. Further, the present invention is not limited to this, and the DC motor 8 may be controlled so that the separating roller 5 rotates in the feeding direction (d) according to the rotation speed of the storing and feeding roller 3 when the bill is stored. Further, in the above embodiment, the method of varying the driving force of the DC motor 8 uses the method of varying the voltage, but in addition to this, the length of time for applying the voltage with a constant voltage is controlled (therefore, the voltage is constant). ), There is a PWM (pulse-wise modulation) method for adjusting the driving force, and any method may be used.

Further, in the above embodiment, the double feed detection sensor 10 for detecting the double feed of the bill based on the amount of transmitted light along the conveying path 1, the double feed detection sensor 10, the light emitting element and the light receiving element is used. Although the conveyance interval detection sensor 11 that detects the ON / OFF time of the interrupted light is individually provided, the present invention is not limited to this, and the conveyance interval of the banknote may be detected based on the detection signal of the double feed detection sensor 10. . Further, it is desirable that the double feed detection sensor 10 and the conveyance interval detection sensor 11 are closer to the position of the storing and feeding roller 3 where the bills are fed, and the detection points of the double feed detection sensor 10 and the conveyance interval detection sensor 11 are the same. May be provided at the same position. Further, although the double feed detection sensor 10 is configured to detect the double feed based on the amount of transmitted light passing through the bill, the present invention is not limited to this, and the double feed is directly detected from the thickness of the bill to be conveyed. May be.

In the above embodiment, paper money is used as an example of paper money, but the paper money is not limited to paper money and may be paper money such as lottery tickets, bonds and securities.

[0041]

As described in detail above, in the first aspect of the invention, the DC motor for applying a driving force to the separating roller in the paper sheet storage direction and the conveying state of the fed paper sheet are provided. Since the state detection sensor for detecting and the control section for controlling the drive voltage applied to the DC motor based on the detection signal of the state detection sensor are provided, the control section controls the drive voltage applied to the DC motor based on the detection signal of the state detection sensor. The drive voltage of the DC motor can be set so that the sheet can be conveyed optimally (that is, there is no double feed and the conveying interval is optimal), and thus the paper sheets can be fed in a stable state. . Further, according to the first aspect of the present invention, by controlling the drive voltage applied to the DC motor, stable feeding of the paper sheet is possible, and a torque limiter is used as in the prior art, and the feeding storage roller and the separation roller are separated. Since the rotation direction of the separation roller is not determined based on the torque difference, it is not necessary to strictly determine the interval between the delivery storage roller and the separation roller, and the effect of preventing the overall configuration from becoming complicated can be obtained. Further, according to the first aspect of the present invention, by appropriately changing the control content of the control unit, the rotational force in the storage direction of the separation roller can be set to an optimum value, and the rotational force can be easily set. The effect that can be obtained is obtained.

According to the second aspect of the invention, the control section controls the application time of the drive voltage of the DC motor based on the detection signal of the state detection sensor, thereby varying the drive force of the DC motor. Similar to the invention of 1, the paper sheets can be delivered in a stable state.

According to the third aspect of the present invention, when the control unit detects the double feed of the paper sheets based on the detection signal of the double feed detection sensor, the inter-paper sheets are detected based on the detection signal of the conveyance interval detection sensor. When it is detected that the interval of is shorter than a preset interval, the drive voltage of the DC motor is increased by a predetermined value and the changed voltage is set to a new drive voltage.
When it is detected that the interval between the paper sheets is longer than the preset interval based on the detection signal of the conveyance interval detection sensor,
Since the drive voltage of the DC motor is lowered by a predetermined value and the changed voltage is set to a new drive voltage, such D
The drive voltage for the C motor can be appropriately set and changed according to the paper sheet conveyance state, whereby the paper sheets can be fed out without double feeding and at an optimum conveyance interval, and a stable paper sheet can be delivered. It becomes possible to carry out leaf feeding.

According to the fourth aspect of the invention, the controller causes the DC
At the time of initial setting of the drive voltage applied to the motor, the storage delivery roller is rotated in the delivery direction, and the drive voltage applied to the DC motor is stepwise increased from the minimum voltage by a predetermined value, so that the separation roller receives the paper. A driving force is applied in the storage direction of the leaves, and at this time, the driving force of the DC motor becomes larger than the driven power transmitted from the storage / delivery roller via the paper sheets, and the separation roller moves from the delivery direction to the storage direction. When it is detected by the rotary encoder that the motor has been reversely rotated, the voltage that is a predetermined value smaller than the drive voltage applied to the DC motor when the rotation direction is reversed is set as the optimum drive voltage. At the time of feeding after setting, if the paper sheets are fed in one sheet normally, the separation roller is driven by the storage feeding roller via the paper sheets. When a double-fed paper sheet is pinched between the separating roller and the separating roller, the friction between the storing and feeding roller and the separating roller becomes small, and the rotation direction of the separating roller is the feeding direction. It is possible to return one sheet of the double-fed paper sheets by reversing from the storage direction to the storage direction. That is, in the fourth aspect of the invention, the double feed occurs at the time of feeding, and the frictional force between the storage feeding roller and the separating roller is slightly reduced, so that the rotation direction of the separating roller driven by the feeding direction is changed. It is possible to directly reverse the feeding direction from the feeding direction to the storing direction, which enables stable feeding of paper sheets.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a paper sheet storage and feeding device.

FIG. 2 is a functional block diagram showing a control circuit of FIG.

FIG. 3 is a flowchart for initializing the drive voltage of the DC motor 8.

4 is a DC motor 8 based on the drive voltage set in FIG.
6 is a flowchart for operating the.

[Explanation of symbols]

 1 Conveyance Path 2 Stacking Section 3 Storage Delivery Roller 4 Feeding Roller 5 Separation Roller 6 Kicking Out Roller 7 Driving Section 8 DC Motor 10 Double Feed Detection Sensor (Status Detection Sensor) 11 Transport Interval Detection Sensor (Status Detection Sensor) 13 Rotary Encoder 15 CPU (control unit) (a) Storage direction (b) Delivery direction (c) Storage direction (d) Delivery direction

Claims (4)

[Claims] 1. A storage roller, which is provided at a position facing the storage / delivery roller and in contact with a peripheral surface of the storage / delivery roller, and which adjusts a conveyance state of paper sheets delivered by the storage / delivery roller. A paper sheet storage / feeding device configured to store / feed paper sheets by driving in either a paper sheet storage direction or a paper sheet delivery direction, wherein paper sheets are stored with respect to the separation roller. A DC motor that applies a driving force in a direction, a state detection sensor that detects the conveyance state of the paper sheets fed by the storage feeding roller, and a drive voltage that is applied to the DC motor based on the detection signal of the state detection sensor. And a control unit for controlling the paper sheet storage and feeding device. 2. The paper sheet storage and feeding device according to claim 1, wherein the controller varies the driving force of the DC motor by controlling the application time of the driving voltage applied to the DC motor. . 3. The state detection sensor includes a double feed detection sensor that detects double feed of paper sheets, and a conveyance interval detection sensor that detects a conveyance interval of paper sheets. When the double feed of paper sheets is detected based on the detection signal of the double feed detection sensor, it is detected that the distance between the paper sheets is shorter than the preset distance based on the detection signal of the conveyance interval detection sensor. In this case, the drive voltage of the DC motor is increased by a predetermined value, the changed voltage is set to a new drive voltage, and the distance between the paper sheets is larger than the preset distance based on the detection signal of the conveyance interval detection sensor. 2. The paper sheet storage and feeding device according to claim 1, wherein, when it is detected that the voltage is long, the drive voltage of the DC motor is lowered by a predetermined value and the changed voltage is set to a new drive voltage. 4. A rotary encoder for detecting the rotation direction of the separation roller, wherein the control unit rotates the storage delivery roller in the delivery direction and sets the DC motor at the initial setting of the drive voltage applied to the DC motor. The driving voltage to be applied to the sheet is gradually increased from the minimum voltage by a predetermined value to give a driving force to the separating roller in the paper sheet storage direction. D than the driven power transmitted
When the rotary encoder detects that the separation motor is reversely rotated from the feeding direction to the storage direction by increasing the driving force of the C motor, D when the rotation direction is reversed.
4. The paper sheet storage and feeding device according to claim 3, wherein a voltage smaller than a drive voltage applied to the C motor by a predetermined value is set as an optimum drive voltage.