JPH03182434A - Paper sheet separating device - Google Patents

Abstract

PURPOSE:To set the interval between delivered paper sheets at the preset value or above even if there is a speed fluctuation of a transfer path by controlling the delivery speed of the paper sheets in response to the paper sheet interval information and the transfer path speed information. CONSTITUTION:A separation sensor 5 outputs a dark signal when it detects a bill 8. A controller 10 receives it and sets a bill interval counter and updates the above bill counter until the tip of the next bill reaches the separation sensor 5. When the tip of the next bill reaches the separation sensor 5, the speed of a transfer path 6 is detected by an encoder 9 provided on an AC motor 13. The bill interval control time is calculated based on the above bill interval counter value and the transfer path speed signal. The bill interval on the transfer path 6 can be kept at a fixed value or above by decelerating or accelerating a feed roller 1 for the calculated bill interval control time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a paper sheet separating device, and particularly to a paper sheet separating device suitable for banknote handling devices used in financial institutions.

[Conventional technology]

Conventionally, as this type of device, for example,
A device disclosed in Japanese Patent No.-13482 is known. This device realizes correction of bill spacing by changing the bill separation speed according to bill spacing information.

[Problem to be solved by the invention]

However, in the above-mentioned conventional technology, although the bill spacing in the bill dispensing section is corrected, there is a problem in that it cannot cope with speed fluctuations of the subsequent conveyance path that conveys the dispensed bills.

To explain this in more detail, since an AC motor is usually used to drive the conveyance path, its speed fluctuates within a range of about ±10%. Even when the delay was within this range, there was a problem in that the interval between banknotes became shorter.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to solve the above-mentioned problems in the conventional technology, and to maintain the interval between sheets to be fed out even if there are speed fluctuations in the conveyance path. It is an object of the present invention to provide a paper sheet separation device that allows the paper sheet separation to exceed a predetermined value.

[Means for Solving the Problems] The above object of the present invention is to provide a separating mechanism for feeding stacked paper sheets one by one, and a separating mechanism for feeding the paper sheets fed out one by one by the separating mechanism. A sheet separation device having a conveyance path, comprising: means for detecting a sheet spacing on the separating mechanism from a trailing edge of sheets fed out one by one to a leading edge of the sheets leading thereto; A paper sheet separation device characterized in that the paper sheet separation device is characterized in that a means for detecting the speed of the paper sheet is provided, and the feeding speed of the paper sheet is controlled according to the sheet spacing information and conveyance path speed information obtained by the mj detection means. achieved by the device.

[Function] In the paper sheet separation device, the paper sheets are separated by a separation mechanism for feeding out the paper sheets one by one and are configured to enter the conveyance path, but the paper sheet separation device according to the present invention In this system, not only the interval between the sheets being fed out but also the speed of the conveying path ahead of the sheet is detected, and by changing the feeding speed of the sheet based on this image information, the paper sheets on the conveying path can be adjusted. , and the next sheet of paper is kept at a predetermined distance or more.

Since the feeding interval of paper sheets is always maintained at a predetermined value or more, it is possible to prevent failures such as paper sheets being rejected due to inability to be identified.

〔Example〕

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

FIG. 2 shows a schematic configuration of a bill separating mechanism that is an embodiment of the present invention. The banknote separating mechanism shown in this embodiment includes a feed roller 1 that rotates in conjunction with a pulse motor I2, which will be described later, and a gate roller 2 that is provided for separating banknotes between the feed roller 1 and the feed roller 1. A pickup roller 3 that intermittently feeds banknotes between the feed roller 1 and the gate roller 2 in synchronization with the feed roller 1, detects the upper end position of the stacked banknotes 8 by a sensor (not shown), and A push plate whose top end position is controlled to be constant 4. At the exit of the separating section formed by the feed roller I and the gate roller 2, there is a separation sensor 51 that checks the passage of banknotes, and a conveyance path 6 that receives the separated banknotes.
and an AC motor 13, which will be described later, for driving the conveyance path 6.

FIG. 1 is an M# block configuration diagram of the above-mentioned banknote separation mechanism. In the figure, 13 is an A for driving the conveyance path 6.
C motor; 12 is a pulse motor that rotates the feed roller 1 and pickup roller 3; 9 is an encoder that rotates in synchronization with the conveyance path 6 and outputs encoder pulses corresponding to the conveyance path speed; The separation sensor described in 1111, which is provided at the separation exit section and outputs information on the passage of banknotes by a light/dark signal of the sensor;
10 is a driver that outputs a phase advancing signal to the pulse motor 12 according to a slewing table that will also be described later, in response to an acceleration/deceleration signal from a control unit IO that will be described later; 1 shows a control unit that outputs an acceleration/deceleration signal for the feed roller 1 based on the banknote interval signal.

FIG. 3 is a diagram showing the flow of sheet separation control in this embodiment configured as described above. The operation of this embodiment will be outlined below with reference to FIGS. 1 to 3.

First, the AC motor 13 for driving the conveyance path is ONL.
(Step 21) Next, by turning on the pulse motor 12 for driving the feed roller 1 (Step 22), the bill 8 is delivered to the separation sensor 5. When the separation sensor 5 detects the banknote 8, it outputs a dark signal (step 23). In response to this, the control section 10 resets the bill spacing counter (step 24), and updates the bill spacing counter until the leading edge of the next bill reaches the separation sensor 5 (step 25). Note that when the leading edge of the next banknote reaches the separation sensor 5, the separation sensor outputs a light signal (step 26).

When the leading edge of the next banknote reaches the separation sensor 5, the speed of the conveyance path 6 is detected by the encoder 9 provided in the AC motor (step 27), and then the above-mentioned banknote interval counter value and the conveyance path speed signal are detected. Based on this, the banknote spacing control time is calculated by a method described later (step 28
), by decelerating and accelerating the feed roller 1 by the calculated bill interval control time (step 29), the bill interval on the transport path can be maintained at a constant value or more.

Hereinafter, the speed control operation will be explained by taking as an example a case where it is determined that the bill interval is shorter than a predetermined value.

FIG. 4 is a diagram showing banknotes in a standard separated state, with banknote dimensions of 76 strokes (=132 pulses) and interval of 2 banknotes of 28+sm.
(=48 pulses) 1 separation period = 125m5ec, and conveyance distance per pulse motor pulse = 0.576m
It is m.

From this, the time required per bill interval l pulse = 694
It becomes μsec. In other words! If the banknote interval is one pulse shorter than the S semi-banknote interval, the banknote separation is set to 694.
By delaying by μsec, the bill interval on the conveyance path is corrected to the standard value. Converting this into a general formula, correction time = (Standard bill interval - Applicable bill interval) x 694μ
sec...(1).

FIG. 5 shows the elapsed time (
Horizontal axis) versus pulse motor! 2 is a graph of the rotation speed of No. 2.

In step 28 described above, the elapsed time from the time t when the separation sensor 5 detects the rear end of the nth banknote to the time t when the leading edge of the n+1th banknote is detected, and the speed of the feed roller 1, i.e. The bill spacing control time is calculated from the rotational speed of the pulse motor 12, and in step 29, based on this, speed control is executed as follows.

The control unit 10 first outputs a deceleration signal to the driver 11 according to the slewing table from time L1 to [,]. Further, from the time when half of the interval control time has elapsed, the control unit IO outputs an acceleration signal to the driver II until the time. From time L onwards, the pulse motor is driven at the maximum speed (indication speed).

FIG. 6 shows a slewing table of the pulse motor 12. In this example, the slewing table has 37 stages, and it takes approximately 43.9 seconds to reach the maximum speed from the lowest speed.
+n5oc is required. If there is no variation in the transport path speed, this table can be applied as is, but in reality, the following table that takes into account the fluctuations in the transport path speed is used.

FIG. 7 shows the correction time corresponding to fluctuations in conveyance path speed. As mentioned above, at standard transport path speed, llX
The quasi-separation period is 125+1 sec. If the transport path speed is 90% of the standard speed, correction can be made by similarly setting the speed of the pulse motor 12 to 90%.

Therefore, correction time = standard separation period x (l/transport path speed ratio) - 12
5+m5ec” (2).

FIG. 8 is a diagram showing the relationship between the elapsed time of bill interval control and the drive pulse, and FIG. 9 is a graph of this. The period column and deceleration time elapsed time column in FIG. 8 are the same as the slewing table in FIG. 6. The drive pulse column is 1
Since pulses have acceleration and deceleration, two pulses are added at a time.

Similarly, the interval control time column is twice as long as the deceleration/acceleration elapsed time column. In addition, the standard speed elapsed time column was obtained from the maximum speed slewing table.

FIG. 10 is a diagram illustrating a table of interval control times corresponding to banknote intervals and transport path speeds, which combines the above. The conveyance path speed is determined by the aforementioned encoder 9, and the bill interval is determined by the separation sensor 5. The correction time is calculated from the sum of equations (1) and (2) above. Further, the interval timer value is read from FIG. 9 based on the above-mentioned correction time.

The actual operation will be explained below.

The stacked banknotes 8 are kept at a constant upper end position by the push plate 4 at the position shown in FIG. Then, as the feed roller 1 rotates, the sheets are separated one by one between the gate roller 2 and fed into the conveyance path 6. Normally, when the pulse motor 12 that rotates the feed roller 1 rotates at a constant speed, the friction between the rubber roller 7 provided on the feed roller 1 and the banknotes causes the banknotes to be rotated at regular intervals one by one per rotation of the feed roller 1. It is then separated and transported.

However, if slipping occurs due to aging of the rubber roller 7, etc., the timing of feeding is delayed by the slipping distance a, and the bill is separated, resulting in a short interval between bills and the next bad bill. Furthermore, when the conveyance speed of the conveyance path 6 becomes slow, the interval between banknotes on the conveyance path 6 becomes short, and in either case, it becomes impossible to distinguish bills, which may cause them to be rejected or jammed. As mentioned above.

To deal with this, in this embodiment, the bill spacing is determined from the elapsed time from when the separation sensor 5 detects the rear end of the bill until it detects the leading edge of the next bill, and the speed of the pulse motor. , the speed of the conveyance path 6 is determined by the encoder 9, and the bill interval control time is calculated by the process described above. If interval correction is necessary, the first period (696μ5ec) of the slewing table in FIG. 8 is calculated. Starting from the second, third, etc., the speed decreases in order.

From the point when half of the interval control time is reached, conversely, the nth time is reached.

...Accelerates to 3rd, 2nd, 1st, and returns to seed speed. By such an operation, separation and tying of the next banknote is delayed, and the interval between banknotes on the conveyance path 6 is maintained at a certain value or more.

According to the above embodiment, by controlling the rotational speed of the pulse motor, even when there is a speed fluctuation in the conveyance path or when the bill interval is less than a standard value, the bill interval is corrected and the bill is conveyed. It becomes possible to maintain the interval between banknotes on the road at a predetermined value or more. For this reason, as described above, there will be no possibility of identification failure, rejection, jamming, etc.

The above embodiment uses a method of detecting the speed of the pulse motor 12 with the encoder 9 and controlling the pulse motor 12 in a slewing manner as a means for changing the banknote feeding speed. Control using a servo motor, a method of controlling by attaching an encoder to a motor operated by air pressure.

Various methods can be applied, such as a method in which an encoder is attached to a DC servo motor for control based on voltage, and a method in which an engine is used for control.

〔Effect of the invention〕

As described above in detail, according to the present invention, there is provided a separation mechanism for feeding stacked paper sheets one by one, and a conveyance mechanism for feeding the paper sheets fed out by the separation mechanism one by one. A sheet separating device having a conveying path includes means for detecting a sheet spacing on the separating mechanism from a trailing edge of the sheet fed out one by one to a leading edge of the sheet leading to the trailing edge of the sheet, and By providing a means for detecting the speed and controlling the feeding speed of the sheet according to the sheet spacing information and the conveying path speed information obtained by the detecting means, there is no fluctuation in the speed of the conveying path. However, it is possible to achieve a remarkable effect in that it is possible to realize a sheet separation device in which the interval between sheets to be fed out is greater than or equal to a predetermined value.

[Brief explanation of drawings]

FIG. 1 is a control block configuration diagram of a bill separating mechanism according to an embodiment of the present invention, FIG. 2 is a diagram showing a schematic configuration of a bill separating mechanism according to an embodiment, and FIG. 3 is a diagram showing a control block diagram of a bill separating mechanism according to an embodiment of the invention. A diagram showing the flow, FIG. 4 is a diagram showing banknotes in a denomination separated state, FIG. 5 is a graph of elapsed time versus rotational speed of the pulse motor to explain the operation of the embodiment, and FIG. 6 is a diagram of the pulse motor Figure 7 shows the correction time corresponding to fluctuations in conveyance path speed, Figures 8 and 9 show the slewing table of No.
The figure is a diagram showing the relationship between the elapsed time of bill interval control and the drive pulse, and Figure 1θ is a diagram showing a table of interval control times corresponding to the overall bill interval and transport path speed. 1: feed roller, 2 nigga roller, 3. Pickup roller, 4; Push plate, 5; Separation sensor, 6: Conveyance path,
8: Banknote, 9: Encoder, 10: Control unit, I engineering: Driver, 12: Pulse motor, 13: AC motor. Fig. 2 Fig. 5 Fig. t. 1 2 [3 Figure

Claims (1)

[Claims] 1. A paper sheet separation device that has a separation mechanism for feeding stacked paper sheets one by one and a conveyance path for conveying the paper sheets fed out by the separation mechanism one by one. means for detecting a sheet spacing on the separating mechanism from a trailing edge of a sheet to a leading edge of a succeeding sheet;
The paper is characterized in that a means for detecting the speed of the conveying path is provided, and the feeding speed of the sheet is controlled according to the sheet spacing information and the conveying path speed information obtained by the detecting means. Leaf separation device.