JPH06329300A - Automatic cash transaction device - Google Patents

Abstract

PURPOSE:To provide a cash automatic transaction device which is compact and simple in structure, and furthermore can detect troubles such as double feeding and a chain of failures at the delivery section quickly with high accuracy in regard to the cash automatic transaction device. CONSTITUTION:The device is equipped with a feed roller 21, and a separator support section 22 which is faced to the aforesaid roller, and can be freely rocked, and is also provided with an angle detector 27 which detects the rocking angle of the separator support section 22 due to approaching papers for the separation support section 22 acting as a separation mechanism which is provided for the delivery section for papers for separating and carrying papers. The device comprises a signal processing means 29 provided, which detects the thickness of papers based on an angle signal from the angle detector 27, and the signal processing means 29 has a function for removing the change in radius at the feed roller 21, and the effect of vibration from the separator support section 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an automatic teller machine (C
D) and an automatic teller machine such as an automatic teller machine (ATM).

In the above-mentioned CD and ATM, in order to count or verify banknotes, it is necessary to separate the banknotes stacked in the accumulating section one by one and feed them to the paper sheet conveying section. However, occasionally, a plurality of paper sheets may be delivered in an overlapping manner (hereinafter referred to as a double feed), or may be delivered in an overlapped state with a slight deviation (hereinafter referred to as a chain), at which time counting or appraisal is unsuccessful. It will be possible.

Therefore, normally, the thickness of a paper sheet is measured by a paper sheet thickness detecting mechanism to detect the presence or absence of double feed and chain.

[0004]

2. Description of the Related Art A conventional sheet thickness detecting mechanism is shown in FIG. This mechanism was previously filed by the applicant (Japanese Patent Application No. 1-41215, filed on February 20, 1991).
In the figure, 1 is a transport path, 4 and 6 are movable rollers and fixed rollers provided with the transport path 1 in between, and 11 is a detection unit. The movable roller 4 is rotatably supported at one end of a lever 2 fixed to the rotary shaft 3, and is pressed against the fixed roller 6 by receiving the urging force of a spring 5 urging the other end of the lever 2.

A potentiometer 10 is fixed to the rotary shaft 3, and the output of the potentiometer 10 is input to a detection unit 11. The detection unit 11 measures the output voltage from the potentiometer 10 and compares it with the determination reference voltage set corresponding to the paper thickness, that is, the voltage change corresponding to the rotation angle of the thickness of one sheet 7 Then, it is determined whether a double feed or chain has occurred.

This mechanism operates as follows. When the sheet 7 is conveyed by the drive roller 8 and the pressing roller 9 provided in the conveying path 1 and passes between the movable roller 4 and the fixed roller 6, the movable roller 4 is pushed up by the thickness of the sheet 7 and the lever 2 swings and the rotary shaft 3 rotates. Since the output voltage from the potentiometer 10 changes according to the rotation angle, the detection unit 11 measures the voltage change and compares it with the determination reference voltage as shown in FIG. 12 to determine whether it is a double feed / chain. .

[0007]

By the way, in the above-described conventional structure, the thickness detecting mechanism is provided as a dedicated mechanism in the middle of the route along which the paper sheets fed from the accumulating section are conveyed. , There are the following problems.

(1) Since the feeding mechanism and the thickness detecting mechanism are separated from each other, the double feed / chain is detected only after the sheets are conveyed to the thickness detecting mechanism. Therefore, when double feeding / chaining occurs continuously due to malfunction of the feeding mechanism, a time lag occurs before the feeding mechanism is stopped, and a plurality of sets of double feeding / chaining occurs during this time.

(2) A new space for mounting the thickness detecting mechanism is required in the ATM or CD device.

In order to solve these problems, it is conceivable to provide a thickness detecting mechanism in the paper sheet separating mechanism arranged in the paper sheet feeding portion as shown in FIG. The structure and operation of the paper sheet separation mechanism are as follows.

In FIG. 13, 20 is a separator, which is arranged alternately with the feed roller 21 in the axial direction, and the arc of the separator 20 and the outer periphery of the feed roller 21 partially overlap. That is, a part of the separator 20 is caught in a predetermined amount between the adjacent feed rollers 21. Reference numeral 22 denotes a separator support portion that can swing around a rotary shaft 24, and the separator support 22 and the roller 23 such as a bearing are attached to the separator support portion 22.

The separator supporting portion 22 is biased in the counterclockwise direction in FIG. 13 by the spring 25 and is pressed against the feed roller via the roller 23. This roller 23
It has a positioning function of setting the overlap amount of the separator 20 and the feed roller 21.

When a paper sheet 7 is fed out by a pick roller (not shown) provided on the left side of the feed roller 21 and enters between the separator 20 and the feed roller 21, friction acts between the paper sheet 7 and the separator 20, Only one sheet of paper on the feed roller 21 side can pass. Therefore, the paper sheet is separated.

In this case, the separator supporting portion 22 is lifted and swings by the thickness of the sheet passing between the feed roller 21 and the roller 23. Therefore, if a mechanism for detecting this swing angle is provided. , Double feed and chain occurrence can be detected. The paper sheet 7 that has passed through the separator 20 is detected by the light beam 19 of the passage detection sensor 18. The computer of the control device (not shown) sets the drive timings of the pick roller and the feed roller 21 using the signal of the passage detection sensor 18, and drives both rollers.

However, such a configuration has the following problems. (1) Since the outer circumference of the feed roller 21 is usually made of a rubber material, the roller radius is not constant and is 0.1 to 0.1 mm.
There is a variation of about 0.2 mm. Therefore, the separator support 22 moves up and down with the rotation cycle of the feed roller 21 as the cycle. (2) When the paper sheet enters between the roller 23 and the feed roller 21 and when the paper sheet exits, the separator support portion 22 is vertically displaced by the thickness of the paper sheet, but at that time, vibration occurs.

The present invention has a simple and compact structure,
Moreover, it is an object of the present invention to provide an automatic teller machine which can immediately detect double feed or continuous occurrence of a chain in the feeding portion with high accuracy.

[0017]

In order to achieve the above object, in the present invention, in an automatic teller machine having a paper sheet feeding / separating mechanism, the feeding / separating mechanism is arranged at a paper sheet feeding portion. A swingable separator support including a feed roller, a separator that faces the feed roller and separates paper sheets fed out between the feed roller one by one, and a roller that is in contact with the feed roller. And an angle detector for detecting the swinging angle of the separator supporting part due to the paper sheet entering the separator supporting part, and the separator supporting part detects the paper sheet from the angle signal from the angle detector. A signal processing means for detecting the thickness is provided, and the signal processing means removes a variation amount of the separator support portion due to a change in the radius of the feed roller from the thickness signal. And a second correcting means for removing a vibration component of the separator supporting portion when a paper sheet passes from a corrected displacement signal from the first correcting means. A configuration characterized by that (first
Configuration).

Further, in the automatic teller machine of the above-mentioned first structure, a temperature sensor for measuring the temperature in the payout separating mechanism and a gap adjustment for adjusting the gap between the separator and the feed roller based on the information from the temperature sensor. Means is added (second configuration).

[0019]

In the case of the first construction, the vertical movement of the separator support part with the rotation cycle of the feed roller as a cycle, and the influence of the vibration of the separator support part when the paper sheet enters between the roller and the feed roller and leaves Is removed, and the thickness of the paper sheet can be detected with high accuracy. Further, since the thickness of the paper sheet is detected by the paper sheet separating mechanism for separating the paper sheets one by one, it is possible to immediately detect the double feed and the chain.

Further, in the case of the second construction, the gap between the separator and the feed roller can be set to an optimum value in accordance with the temperature inside the apparatus, and in particular, double feed and chain formation can be prevented at low temperatures. Will be possible.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.

FIG. 7 is a side view showing the outline of the structure of an automatic teller machine 100 for ATM, CD, etc. to which the present invention is applied.
101 is a cash processing unit, 102 is a display unit, 103 is an input unit, 104 is a card reading unit, and 105 is a bookkeeping unit. The display unit 102 shows the operation method to the user with pictures and characters, and displays the amount of money input by the user. Input unit 103
Is composed of a keyboard and a touch panel. With this, the user selects transaction details and inputs a personal identification number and amount.

The card reading unit 104 reads the contents of the cash card. The bookkeeping unit 105 is a unit for printing transaction details on a passbook. The internal details of the cash processing unit 101 are as follows.

Reference numeral 106 denotes a cash outlet for delivering cash to the user. Reference numeral 107 denotes a pay-out separating mechanism, which separates the banknotes one by one and conveys them to the conveyance path (arrow line in the figure) 1
Send to 08. A plurality of pay-out separating mechanisms 107 are installed in the cash processing section 101. A discriminating unit 109 discriminates whether the bill is a genuine bill or a counterfeit bill, and measures the thickness of the bill passing therethrough to determine the presence / absence of double feed / chain.

A stacker 110 stores banknotes deposited by the user and banknotes for payment. Stackers are installed for different types of money, such as 10,000-yen and 1,000-yen tickets. Reference numeral 111 denotes a bank clerk cassette, in which a replenishment case 112 for replenishing cash in the cash processing unit 101, a collection case 113,
There is an unfit banknote collection case 114 for collecting bad banknotes. An example of the flow of banknotes in the main processing unit 101 is as follows.

(1) When a bank clerk replenishes banknotes: replenishment case 112 → discrimination unit 109 → stacker 110 (2) depositing outlet 106 → discrimination unit 109 → stacker 110 (3) payment stacker 110 → discrimination unit 109 → Exit 106

FIG. 1 shows a sheet feeding and separating mechanism used in this automatic teller machine. The same members as those in FIG. 13 are designated by the same reference numerals. In the figure, 26 is a pick roller provided in the feeding mechanism, and 27 is an angle detector for measuring the swing angle of the separator support 22. A potentiometer or a rotary encoder is used as the angle detector 27, and its case portion is fixed to the feeding mechanism and its rotating portion is fixed to the rotary shaft 24.

Reference numeral 29 is a signal processing section (signal processing means), which comprises a converting means 30, a judging means 32, and a judging reference value 33. An angle signal 28 (a voltage signal in the case of a potentiometer and a pulse signal in the case of a rotary encoder) from the angle detector 27 is input to the signal processing unit 29.

When the paper sheet 7 is paid out between the separator 20 and the feed roller 21 by the pick roller 26, the paper sheet 7 next passes between the roller 23 and the feed roller 21. Since the roller 23 is pressed against the feed roller 21, when the paper sheet 7 passes, the roller 23
Is pushed up by the thickness of the paper sheet 7 and is displaced upward by d.

When the roller 23 is displaced, the separator support 22 to which the roller 23 is attached is rotated by the rotary shaft 24.
It swings about the angle θ. This relationship between d and θ is expressed by the following equation, where L is the horizontal distance between the center of the rotary shaft 24 and the center of the roller 23. d = L ・ θ (1)

When the angle detector 27 swings, the angle signal 28 is input to the signal processing unit 29, and the converting means 30 converts the angle signal 28 into the thickness signal 31 using the above equation (1). If the computer 36 that controls the sheet feeding mechanism outputs the reset signal 35 to the converting means 30 immediately before feeding the sheet, the converting means 30 is reset and the value of the thickness signal 31 becomes zero.

The judging means 32 compares the thickness signal 31 with a plurality of predetermined judgment reference values 33, and also measures the time change of the thickness signal 31 to measure the state of the paper sheet (single sheet, double feed or chain). Or) to output the status signal 34 to the computer 36. The pattern of the thickness signal 31 in the case of single-passage, double-feed, and chain is shown in FIG.

By the way, the object of the present invention is to detect whether or not the paper sheets are double-fed / chained.
Even if the measured thickness value does not exactly match the value of (thickness of one sheet x number of sheets), the purpose can be achieved if the amount is proportional to the number of sheets.

In the thickness detecting mechanism as described above, as described above, the separator supporting portion 22 moves up and down with the rotation cycle of the feed roller 21 as a cycle, and the paper sheet is between the roller 23 and the feed roller 21. There is a problem that vibration occurs when the separator support portion 22 is vertically displaced when entering and exiting.

FIG. 3 is a displacement waveform diagram of the separator supporting portion. Further, FIG. 4 is a vibration waveform diagram of the above-mentioned separator supporting portion, point A is the vibration when the paper sheets enter between the roller 23 and the feed roller 21, and point B is the vibration when the paper leaves.

If there is such a phenomenon, it is not possible to discriminate a single sheet passage / double feed / chain by simply comparing the thickness signal 31 with a constant judgment reference value as described above. Have difficulty. Therefore, it is effective to perform signal processing on the thickness signal 31 to remove the influence of the above. FIG. 5 and FIG. 6 are schematic views of the construction of a paper sheet feeding and separating mechanism adopting such means, and the construction and operation thereof will be described below. 5 and 6, the same members as those in FIG. 1 are designated by the same reference numerals.

In FIG. 5, reference numeral 40 denotes a signal processing unit (signal processing means). Reference numeral 41 is a rotation angle detecting means for detecting the rotation angle of the feed roller 21. As a specific example of this means, a rotary encoder is a feed roller 2
A mechanism for directly detecting the rotation angle of 1, the feed roller 21
If the drive motor is a pulse motor, there is a mechanism for counting the input pulse signal to the motor and converting it into a rotation angle.

Reference numeral 42 denotes a correction signal storage means which idles the feed roller 21, that is, in a state where the pick roller is stopped so that the sheet 7 is not fed out.
By rotating only the rotation angle 43 of the feed roller 21 at that time and the thickness signal A4 converted from the angle signal 28.
The relationship of 4 is stored. That is, the correction signal storage means 42 stores the displacement state (waveform in FIG. 3) of the separator support portion 22 due to the radius change of the feed roller.

The separator supporting portion 22 is the feed roller 2
Since it periodically changes in synchronization with one rotation, the correction signal storage means 42 may store data for one rotation of the feed roller 21. The storage operation is performed by the computer 36.
Is executed by the storage command signal 45 from Reference numeral 46 denotes a subtracting means, which subtracts the correction signal 47 output from the correction signal storage means 42 from the thickness signal A44. Correction signal storage means 4
2 and the subtraction means 46, the feed roller 2 from the thickness signal.
A first correction unit that removes the variation due to the radius change of 1 is configured.

When detecting the thickness of the paper sheet, the correction signal 47 in the correction signal storage means 42 is subtracted from the thickness signal A44 by using the rotation angle of the feed roller 21 as a key, and the feed roller 21 The thickness signal B48 from which the influence of the radius change is removed is obtained. Reference numeral 49 denotes a low-pass filter (second correction means), which is the thickness signal B4 output from the subtraction means 46.
The vibration signal of the separator support portion 22 is removed from 8 and a thickness signal C50 is output.

The judging means 32 compares the thickness signal C50 with a plurality of predetermined judgment reference values 33, and also measures the time change of the thickness signal C50 to measure the state of the paper sheet (1 sheet / sheet).
Double feed / chain) is determined and the status signal 34 is output to the computer 36.

In the paper sheet feeding / separating mechanism of FIG. 6, 60 is a signal processing unit (signal processing means), 61 is a band elimination filter (first correction means), and the band elimination filter 61 is a conversion unit. From the thickness signal A62 from the means 30,
The variation caused by the change in the radius of the feed roller 21 is removed.

The degree of change in the radius of the feed roller 21 differs depending on the feeding mechanism, and accordingly, the thickness signal A62 is changed.
Has a different waveform, and the frequency components to be removed are also different. Therefore, the stop frequency set value 63 can be changed by the computer 36. The thickness signal B64, which is the output of the band elimination filter 61, is input to the low-pass filter 49 that removes the vibration component of the separator support portion 22.

The determination means 32 compares the thickness signal C65 from the low-pass filter 49 with a plurality of predetermined determination reference values 33, and also measures the time change of the thickness signal C65 to determine the state of the paper sheet (1 (Sheet / double feed / chain), and outputs the status signal 34 to the computer 36.

In the embodiments shown in FIGS. 1, 5 and 6, the angle signal 28 is converted into the thickness signal by the converting means 30, but as shown in the equation (1), the thickness of the paper sheet, that is, Since the displacement amount d of the roller 23 is proportional to the angle signal θ,
Even if the angle signal 28 is output as it is without being converted into the thickness signal by the conversion means 30, the state of the paper sheet (1
Sheet / double feed / chain) can be determined.

In the paper sheet feeding and separating mechanism shown in FIGS. 1, 5 and 6, the roller 23 is attached to the separator supporting portion 22, so that the amount of overlap between the separator 20 and the feed roller 21 is always constant. Is. Therefore, there were the following problems.

That is, when it is desired to drive the morning device in the winter when the temperature drops, especially in cold regions, the paper sheets are not separated well, and double feed and chaining frequently occur. This problem is not resolved even if the device is retried, and AT
With M and CD, it also led to the situation of losing the trust of customers.

This is because the rubber hardness of the feed roller 21 becomes larger (harder) as the temperature decreases, and the amount of sinking of the roller 23 into the feed roller 21 becomes smaller and the overlap amount becomes smaller (the gap becomes wider). This is because it is easy for multiple sheets of paper to come out together. In order to solve this problem, the gap adjusting means 70 between the separator and the feed roller shown in FIG. 8 may be used. 8A is a plan view and FIG. 8B is a side view (a cross-sectional view taken along the line AA of FIG. 8A).

In FIG. 8, 71 is a separator supporting portion 2.
2 is a fixed plate fixed to 2, 72 is a support plate swingably supported by the separator support portion 22 via a rotary shaft 73, and 74 is an actuator such as a piezoelectric element. The separator 20 is attached to the support plate 72, and the actuator 74 is attached to the fixed plate 71. Fixed plate 71 and support plate 72
A spring 75 is arranged between them, and the support plate 72 is in contact with the tip of the actuator 74 by the biasing force of the spring 75. Fixed plate 71, support plate 72, actuator 74
Constitutes the gap adjusting means 70.

The gap (overlap amount) between the separator 20 and the feed roller 21 is determined by the roller 24 contacting the feed roller 21 by the urging force of the spring 25 urging the separator supporting portion 22. When it is desired to change this gap, the command value (applied voltage) to the actuator 74 is changed. As a result, the actuator 74 expands and contracts in the arrow B direction. Specifically, the actuator 74 expands by increasing the command value when the temperature decreases, and contracts by decreasing the command value when the temperature increases.

Since the separator support portion 22 is positioned at a fixed position by the roller 23, when the actuator 74 expands and contracts as described above, the support plate 72 rotates to change the position of the separator 20 and change depending on the temperature. The gap between the separator 20 and the feed roller 21, that is, the overlap amount can be returned to the original value and made constant, and stable sheet separation can be realized.

FIG. 9 shows the structure of a paper sheet separating mechanism using this gap adjusting means. FIG. 9A is a plan view and FIG.
9B is a side view (sectional view taken along line CC of FIG. 9A), and the displacement amount of the actuator 74 is controlled by the computer 76. Reference numeral 77 is a power amplifier, and 78 is a voltage command value. 7
Reference numeral 9 denotes a roller (pick roller, feed roller) drive circuit. In addition to the piezoelectric element, a magnetostrictive element, a solenoid, a motor, or the like may be used as the actuator.
A temperature sensor 80 detects the temperature inside the device.

The operation of the paper sheet separating mechanism having the above configuration is as follows. The computer 76 calculates the amount of displacement of the actuator 74 by obtaining the information from the temperature sensor 80.
That is, the computer 76 has a relationship between the temperature and the optimum overlap amount based on the data obtained in advance, and since the gap widens at low temperatures, the relationship is such that the overlap amount is increased. The opposite is true at normal temperature and high temperature.

When the temperature data is read, the amount of overlap is obtained from the table. If the values are scattered, interpolation calculation is performed. When the overlap amount is determined, the actuator 74 is controlled by using the overlap amount as a command value. This state is shown in FIG. Information from the temperature sensor 80 is input to the computer 76 as temperature data 82 via the A / D converter 81, and the overlap amount is obtained from the table 84 of the memory 83.

If the gap adjusting means shown in FIGS. 7 to 9 is applied to the paper sheet feeding / separating mechanism shown in FIGS. 1, 5 and 6, adverse effects due to changes in ambient temperature can be eliminated. Yes, it is more effective.

[0056]

As described above, according to the present invention, the following various excellent effects can be obtained. (1) Since the thickness of the paper sheet is detected by the separation mechanism unit that is arranged in the feeding portion and separates the paper sheets one by one, a special special measurement for the thickness other than the conventional angle detector is used. No special mechanism is required, and the device configuration is simple and compact. In addition, if a double feed or chain occurs continuously, it can be detected immediately, so that it is possible to take measures when the operation of the feeding mechanism is stopped in a short time. It can be prevented from being sent. (2) It is possible to detect the thickness of the paper sheet with high accuracy by removing the adverse effect of the vertical movement of the separator support portion due to the change in the radius of the feed roller and the vibration of the separator support portion when the paper sheet passes. . (3) Since the amount of overlap between the separator and the feed roller can be made variable by providing the gap adjusting means, the optimum amount of overlap can be set according to the temperature inside the apparatus, and especially double feed at low temperature and It becomes possible to prevent the occurrence of a chain.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a paper sheet feeding and separating mechanism according to an embodiment of the present invention.

FIG. 2 is a waveform diagram of a thickness signal according to the embodiment of the present invention.

FIG. 3 is a displacement waveform diagram of the separator support portion according to the embodiment of the present invention.

FIG. 4 is a vibration waveform diagram of the separator supporting portion according to the embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of a sheet feeding and separating mechanism using another signal processing unit according to the embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of a sheet feeding and separating mechanism using still another signal processing unit according to the embodiment of the present invention.

FIG. 7 is a side view showing a schematic configuration of an automatic teller machine to which the present invention is applied.

FIG. 8 is a structural explanatory view of the gap adjusting means between the separator and the feed roller of the embodiment of the present invention, FIG. 8 (A) is a plan view,
FIG. 8B is a side view.

9A and 9B are structural explanatory views of a paper sheet separating mechanism using the gap adjusting means of FIG. 8, FIG. 8A is a plan view, and FIG. 8B is a side view.

FIG. 10 is an explanatory diagram of actuator control in the paper sheet separating mechanism of FIG. 9;

FIG. 11 is a side view showing a conventional sheet thickness detecting mechanism.

FIG. 12 is an output voltage waveform diagram of the potentiometer of FIG.

FIG. 13 is a side view showing the structure of a paper sheet separating mechanism.

[Explanation of symbols]

 20 Separator 21 Feed Roller 22 Separator Support 23 Roller 27 Angle Detector 29, 40, 60 Signal Processor (Signal Processor) 70 Gap Adjuster 80 Temperature Sensor

Claims (2)

[Claims] 1. An automated teller machine having a paper sheet feeding / separating mechanism (107), wherein the feeding / separating mechanism (107) is a feed roller (2) arranged at a paper sheet feeding portion.
1), a separator (20) that faces the feed roller (21) and separates paper sheets fed out between the feed roller (21) one by one, and the feed roller (2)
1) and a swingable separator support part (22) provided with a roller (23) that abuts against the separator (1), and the separator support part (22) by the paper sheet entering the separator support part (22). ) Is provided with an angle detector (27) for detecting the swing angle, and signal processing means (29) for detecting the thickness of the paper sheet from the angle signal from the angle detector (27) is provided. The signal processing means (29) removes a fluctuation amount of the separator support portion (22) due to a radius change of the feed roller (21) from the thickness signal converted from the angle signal; Second correction means for removing a vibration component of the separator support portion (22) when a paper sheet passes from the correction displacement signal from the first correction means. Cash automatic transaction device. 2. The automatic teller machine according to claim 1, further comprising a temperature sensor (8) for measuring the temperature in the payout separating mechanism.
0) and gap adjusting means (70) for adjusting the gap between the separator (20) and the feed roller (21) based on the information from the temperature sensor (80). apparatus.