JPH0246993B2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a paper sheet conveying device that distinguishes the type and authenticity of paper sheets such as banknotes, sorts them, and performs payment processing, and particularly relates to a paper sheet conveying device that performs diagonal feeding. The present invention relates to a paper sheet conveying device in which a correction device can be easily adjusted.

``Prior art'' As is well known, the most important issue in paper sheet conveyance devices is how to accurately and quickly distinguish the type and authenticity of paper sheets. It is greatly affected by the conveyance state, and in particular, oblique feeding of paper sheets significantly impairs the discrimination ability, and abnormalities in the conveyance interval have a large effect on processing speed.
In order to adjust this skew feeding and abnormalities in the conveyance interval, paper sheet conveying apparatuses equipped with a skew feeding correcting device are now mainstream.

FIG. 1 is a diagram showing an example of the configuration of a conventional paper sheet conveying device equipped with this type of skew feed correction device. FIG. 1A is a side view thereof, and FIG. 1B is a plan view thereof. .

In these figures, 1 is a paper sheet such as a banknote, and the paper sheet 1 is held between a front plate 2 and a pressing plate 3. Then, the paper sheets 1 are kicked out one by one by a kicking roller 4 provided in front of the front plate 2 (on the left side of the figure).
is subjected to upward resistance (anti-conveyance direction) by resistance rollers 5, 5, while feeding rollers 6, 6,
6 and the separating member 7 form a gap, and is conveyed to the belt conveying mechanism 8 by the feeding roller 6. At this time, the separation member 7 prevents the paper sheets 1 from being fed in two sheets. In addition, various sensors (not shown) are arranged in the belt conveyance mechanism 8, and these sensors are used to measure the length of the paper sheet 1,
Outputs various detection signals for determining authenticity, etc. In this way, the paper sheets 1 that have undergone various checks by the belt conveyance mechanism 8 are sent out to the right in the figure and are classified based on the detection signals of the various sensors.

Now, the above-mentioned resistance rollers 5, 5 face both sides of the central feeding roller 6, and control the conveyance state of the paper sheet 1 by applying frictional force in the opposite direction to the paper sheet 1 from the opposite side. It is something that makes you That is, when the adjusting screw 5a is turned clockwise in FIG.
The arm 5c, which rotates around b as an axis, rotates counterclockwise in FIG.
The frictional force between the resistance roller 5 and the paper sheet 1 is weakened, and conversely, when the adjusting screw 5a is turned counterclockwise in the figure (b), the gap width is narrowed and the frictional force is strengthened. In this way, by mutually adjusting the two resistance rollers 5, 5 facing on both sides of the central feeding roller 6, the diagonal feeding and the conveyance interval can be adjusted. A ratchet wheel 5d is attached to the resistance roller 5, and a ratchet pawl 5 supported on the horizontal shaft 5b
e prevents the resistance roller 5 from rotating clockwise. The components 5, 5a to 5e described above constitute the skew feed correction device.

``Problems to be Solved by the Invention'' Conventionally, when adjusting the skew feeding and the conveyance interval using the above-mentioned skew feed correction device, the operator conveys an appropriate number of paper sheets and checks the condition. Adjustments are made by repeatedly checking visually, stopping the conveyance after checking, and turning the adjustment screw to make adjustments. Since all of the above-mentioned operations are performed manually, there is a problem in that the adjustment work of the adjustment screw lacks accuracy.

In view of the above-mentioned circumstances, it is an object of the present invention to provide a paper sheet conveying device that can reliably and easily adjust the diagonal feeding of paper sheets and the conveyance interval.

"Means for Solving the Problem" In order to achieve the above object, in the present invention, paper sheets are provided at intervals in the width direction of the conveyance path through which paper sheets are sent out, and resistance to the paper sheets is provided. In a paper sheet conveying device having at least one pair of resistance rollers that provide resistance, and a correction device that adjusts the resistance of the resistance rollers to correct skewed feeding of the paper sheet, the paper sheet conveying device is used for carrying out normal cash processing. a mode changeover switch for switching between a processing mode and an adjustment mode for adjusting the resistance roller; and a plurality of mode changeover switches arranged at intervals in the width direction of the conveyance path to detect whether or not the paper sheet is passing. A detector, a determination unit that detects the conveyance state of the paper sheet based on output signals of these detectors and outputs data regarding the conveyance state of the paper sheet, and a mode changeover switch that selects an adjustment mode. When you are
By conveying a predetermined number of paper sheets onto the conveyance path and comparing the data output from the discrimination section with preset reference data, the conveyance state of the paper sheets is determined and the A control section for displaying the determination result on the display section is provided.

"Operation" According to the present invention, the discriminator determines the conveyance state of the paper sheets, such as the amount of inclination of each paper sheet, the conveyance interval of the paper sheets, etc., based on the output signal from the detector, and further, In the control section, by comparing the data regarding the conveyance state outputted from the discrimination section with the reference data, information such as presence or absence of diagonal feeding, quality of conveyance interval, etc. is obtained, and this information is displayed on the display section.

"Example" Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 2 is a diagram showing the configuration of the control section of this embodiment. In the figure, 11 is a CPU (central processing unit), and the CPU 11 receives various output signals (these will be described later) from the discriminating section 12. 13. Read through the input side I/O port 14 and bus 15, compare these with predetermined reference values, classify and organize them, create slope amount data and interval amount data, and judge whether they are correct or not. to create display data. Then, this display data is bus 1
5. The signal is supplied to the display unit 18 via the output side I/O port 16 and the driver 17, and is displayed. next,
A mode changeover switch 19 connected to the receiver 13 has two modes: a cash processing mode in which normal cash processing is carried out, and an adjustment mode in which processing is carried out to obtain data for the above-mentioned adjustment (incline amount data, interval amount data, etc.). This is for switching and selecting between
The CPU 11 performs adjustment mode processing. On the other hand, a transport motor 20 connected to the driver 17 is a motor that rotationally drives each part of the transport mechanism, a clutch 21 for driving the intake is a clutch provided in each part of the transport mechanism, and a brake 22 for stopping intake is provided in each part of the transport mechanism. This is a brake to ensure that the vehicle stops. Furthermore, a ROM (read-on memory) 23 connected to the bus 15
is a memory that stores control programs, and RAM (random access memory) 24 is a memory that stores various data and the like. Also, clock 25 is
It supplies a clock signal CLK to the CPU 11. Note that the photo 51 and photo 52 indicated by broken lines will be described later.

Next, FIG. 3 is a diagram showing an example of the configuration of the discriminating section 12, where A is a plan view showing the relationship between the paper sheet 1 and the photoelectric switch, and B is an example of the configuration of the discriminating section 12. FIG. First, in Figure 3 A,
Each of the photoelectric switches 28 and 29 consists of a light emitting element and a light receiving element (photodiode). The first
It is arranged within the belt conveyance mechanism 8 shown in the figure.
The photodiode (hereinafter referred to as "photo") 28a of the photoelectric switch 28 becomes a "1" signal from when it detects the left leading edge 1a of the paper sheet 1 until the left trailing edge 1b passes; outputs a signal SL which becomes a "0" signal. On the other hand, the photo 29a of the photoelectric switch 29 shows the right front edge 1c of the paper sheet 1.
It outputs a signal SR which becomes a "1" signal from the time when the right trailing edge 1d is detected until the right trailing edge portion 1d passes, and which becomes a "0" signal otherwise. And these signals SL,
The SR is supplied to the discrimination section 12 shown in FIG. The determining section 12 is composed of a tilt direction detection circuit 31, a tilt amount detection circuit 32, and a gap amount detection circuit 33. First, the tilt direction detection circuit 31 is composed of two AND gates 34, 35, two S/R flip-flops (hereinafter abbreviated as FF) 36, 37, and a NOR gate 38, and determines which side of the paper sheet 1, the left or the right, comes first. This is to detect whether the The operation of this circuit will be explained below. First, when the paper sheet 1 does not interrupt the photoelectric switches 28 and 29, both SL and SR are "0" signals, and the set terminals S of FFs 36 and 37 receive "0" signals from the AND gates 34 and 35. are supplied to the reset terminals R of the FFs 36 and 37, and a "1" signal is supplied from the NOR gate 38, thereby resetting both the FFs 36 and 37.
A "1" signal is supplied from the Q output terminals of the FFs 36 and 37 to the input terminals of the AND gates 35 and 34, respectively. In such a state, if the paper sheet 1 is being conveyed and, for example, the photo 28a first detects the left front edge 1a of the paper sheet 1,
Since the signal SL becomes a "1" signal, the output signal of the AND gate 34 becomes "1", the output signal of the NOR gate 38 becomes "0", and the FF 36 is set.
As a result, a "0" signal is output from the Q output terminal of the FF 36, closing the AND gate 35, the photo 29a detects the right leading edge 1c of the paper sheet 1, and the signal SR becomes a "1" signal. Also, the set state of FF 36 and the reset state of FF 37 are maintained. In this way, when the left front edge 1a leads, the FF3
Incline direction data of “1” signal from Q output terminal of 6
DL is output. And again the signal SL=SR=
The tilt direction data DL is maintained at a "1" signal until it becomes "0" and the FF 36 is reset, that is, until the paper sheet 1 passes through the photoelectric switches 28 and 29. On the other hand, when the right front edge 1c of the paper sheet 1 is detected first, while either the photoelectric switch 28 or 29 is cut off, the tilt direction data DR of the "1" signal is output from the Q output terminal of the FF 37. is output.

Next, the slope amount detection circuit 32 includes two AND gates 40 and 41 and an exclusive OR circuit (hereinafter EX-
It consists of an OR) 42, an FF 43, and a counter 44, and detects the amount of inclination. That is, the AND gate 41 is in an open state from when the leading leading edge, for example, the left leading edge 1a, is detected by the photoelectric switch 28 until the trailing right leading edge 1c is detected by the photoelectric switch 29. During this period, the counter 44 counts the number of pulses of the clock signal CLK applied to its trigger terminal T, and thereby converts the amount of slope into the number of pulses for detection. More specifically, when the signal SR=SL="0", the output of the AND gate 40 is "0", the output of the NOR gate 38 is "1", and the FF 43 is in a reset state.
On the other hand, at this time, the output of EX-OR is a "0" signal. Further, the counter 44 is cleared when the output of the NOR gate 38 becomes "1". Next, the left front edge 1a is detected by the photoelectric switch 28, and a signal
When SL="1" and SR="0", Noah Gate 3
8 becomes "0", but since the output of AND gate 40 is also "0", FF 43 remains in the reset state. Also, at this time, EX−OR
Since the output of 42 becomes a "1" signal, the AND gate 41 is opened and the counter 44 counts the clock signal CLK. Next, when the right front edge 1c is detected and the signal SL=SR becomes "1", the output of the AND gate 40 becomes "1" and the FF 43 is set. As a result, the AND gate 41 is closed and the counter 44 stops counting.
Next, when the left rear edge portion 1b passes through the photoelectric switch 28 and SL="0" and SR="1", the outputs of the AND gate 40 and the AND gate 38 both become "0", and the FF 43 enters the set state. This keeps the AND gate 41 closed. Further, when the right rear edge portion 1d passes through the photoelectric switch 29 and returns to the signal SL=SR=“0”, the AND gate 41 is kept in the closed state as described above.
Clock signal CLK is not counted. Thus, the counter 44 counts the clock signal CLK from the time when the leading edge on the leading side is detected until the leading edge on the trailing side is detected. As a result, the distance difference between the left front edge 1a and the right front edge 1c is converted into the number of pulses, which is output from the counter 44 as the tilt amount data DD.

Next, the interval amount detection circuit 33 detects the OR gate 4
5, 46, a counter 47, a latch circuit 48, and an inverter 49, and detects the amount of interval. That is, the counter 47 receives the drive signal
SDR (this is the signal output when the start button is pressed at the start of operation) or the output signal of the inverter 49 (this is the signal SL = "1" or SR
= "1" and becomes a pulse-like "1" signal), and the clock signal CLK is counted. Then, when the leading edge of the paper sheet 1 is detected first and the output of the OR gate 45 becomes "1", the count value of the counter 47 at this time is read into the latch circuit 48. In this way, an output signal is output to the latch circuit 48 from the time the start button is pressed, or from the time the leading edge of the previously conveyed sheet passes until the leading edge of the next sheet is detected. The number of pulses of the clock signal CLK obtained is latched as interval amount data DS. Then, each data DL, DR,
DD, DS and check command CC are supplied from the determining section 12 to the CPU 11 as shown in FIG. Note that the check command CC is output from the AND gate 40, and becomes a pulse-like "1" signal when the signal SL=SR=1.

In such a configuration, when the operator presses down the mode changeover switch 19 to select the adjustment mode, the CPU 11 performs the control shown in the flowchart of FIG. That is, the CPU 11 sets the count value N of the built-in sheet number counter to N=0, and
The conveyance motor 20 is started and the paper sheet 1 is conveyed. Then, when both the photos 28a and 29a enter the cut-off state, that is, when the check command CC becomes a "1" signal, the discriminator 12
Each output data DL, DR, DD, and DS are read and written to the RAM 24. In this way, paper sheet conveyance → output data reading of the discriminator 12 → RAM 2
4 is sequentially repeated, and when the above data is collected for a predetermined number of sheets (N=10), the conveyance motor 20 is stopped. and,
CPU11 is interval amount data DS and slope amount data
DD is compared with a predetermined reference value and classified. Figure 5 A shows the classification result of the interval amount data DS obtained in this way. If the interval amount deviates from the standard range even once, the CPU 11 In response to the,
Judgments are made as ``long,''``short,'' and ``random.'' (when the interval is too long and too short occur at least once each), and the display data corresponding to these judgments (interval judgment) is displayed. create. On the other hand, FIG. Sometimes abnormal. In addition, other than that, it is judged to be normal. In this case, the CPU 11 determines "normal", "abnormal (L side leading)", and "abnormal (R side leading)" and creates display data corresponding to these determinations (tilt determination). When the classification and judgment of each data is completed in this way, the CPU 11 displays the display data corresponding to the interval amount abnormality for a certain period of time, and then displays the display data corresponding to the inclination judgment for a certain period of time. Note that the CPU 11 constantly checks whether the start button has been pressed, and when this is detected, the above-described processing is performed again.

When the respective display data corresponding to the interval determination and inclination determination are displayed in this manner, the operator makes the adjustments shown in FIG. 5C based on these data. for example,
If the interval judgment is "long" and the inclination judgment is "abnormal (L side leading)", the operator turns the adjustment screw 5a on the lower side, that is, on the right side in the conveyance direction, clockwise as shown in FIG. 5 and the imaginary outer peripheral surface of the feed roller 6. Then, press the start button again to check the operating state of the device after adjustment. In the same manner, the operator can easily and accurately adjust the skew feed correction device based on the classification results of the CPU 11.

Next, FIG. 6 is a circuit diagram showing another example of the structure of the discriminating section, and this discriminating section 12' differs from the discriminating section 12 shown in FIG. 3 in the following points.

In the discriminating section 12' shown in FIG.
The photo array 5 is placed in the position of the photo 28a shown in the figure.
1. A photo array 52 is provided at the position of the photo 29a, the photo array 51 consists of N photos L1 to LN arranged in a line in the transport direction, and the photo array 52 also consists of N photos R1 to RN arranged in a line in the transport direction. . The input terminal of the AND gate 34 receives the output signal of the photo L1.
The input terminal of the AND gate 35 is supplied with the output signal SR1 of the photo R1.

The tilt amount detection circuit 53 is a multiplexer 54.
, an encoder 55, and a latch circuit 56, and the selector terminal A of the multiplexer 54
is the signal DL from the Q output terminal of FF36, and the selector terminal B is the signal from the Q output terminal of FF37.
DR is supplied respectively. In addition, the input terminals A1 to AN of the multiplexer 54 are connected to the photo L1.
~LN output signals SL1~SLN are input terminal B
1 to BN is the output signal SR1 of photo R1 to RN.
~SRN is supplied. In this way, the output terminals X1 to XN of the multiplexer 54 receive the output signals SL1 to
When SLN is signal DR = “1” (i.e. leading on the right side), the output signals of photos R1 to RN are
SR1 to SRN are each output. The output signals of the output terminals X1 to XN are encoded into binary codes by the encoder 55, and when the check command CC becomes a "1" signal, that is,
Latch circuit 56 latches when a trailing leading edge is detected. In this way, the latch circuit 5
6 shows photos L1 to Li that are blocked by the paper sheet 1 when the trailing leading edge is detected.
The number i (or i) of (or R1 to Rj) is binary encoded and latched. In this way, paper sheets 1
The left-right difference, that is, the slope amount data DD is output from the latch circuit 56.

Other than the above-mentioned points, the configuration and operation of the discriminating units 12 and 12' are the same, and each data DL, DR, DD, and DS output from the discriminating unit 12' is processed in the same manner as in the case described above. Ru.

It is also possible to directly supply the outputs of the photos 28a, 29a or the photo arrays 51, 52 to the CPU 11 via the receiver 13 shown in FIG.
reference).

"Effects of the Invention" As described in detail above, according to the present invention, the discriminator determines the conveyance state of the paper sheets based on the output signal from the detector, for example, the amount of inclination of each paper sheet, the amount of paper sheets, etc. The control unit compares the data regarding the conveyance status output from the determination unit with the reference data, and information such as the presence or absence of diagonal feeding and the quality of the conveyance interval is displayed on the display unit. Therefore, by referring to the information displayed on the display unit, the operator can operate the correction device and easily and reliably adjust the resistance roller that applies resistance to the banknote. Effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of the configuration of a conventional paper sheet conveying device equipped with a skew feed correction device, in which FIG. 1A is a side view thereof, and FIG. 1B is a plan view thereof. Furthermore, FIG. 2 is a block diagram showing the configuration of the control section of the paper sheet conveying device according to the present invention, FIG. 4 is a flowchart for explaining the processing operation of the CPU 11 when the adjustment mode is selected; FIG. 5A shows the classification results and judgments of the interval amount data. Figures 1 and 2 are diagrams showing the classification results and judgments of the inclination amount data, and figures c are diagrams showing the adjustment method taken by the operator based on the display data corresponding to the judgments. In addition, FIG. 6A shows paper sheets being conveyed and photo arrays 51 and 5.
Figure 2 shows the relationship between the determination unit 12' and
FIG. 5, 5a to 5e... skew feed correction device, 11...
... CPU (discrimination section, control section), 12, 12'... Discrimination section, 18 ... Display section, 19 ... Mode changeover switch, 28, 29 ... Photoelectric switch (detector), 5
1,52...Photo array (detector).

Claims (1)

[Scope of Claims] 1. At least a pair of resistance rollers that are spaced apart from each other in the width direction of a conveyance path through which paper sheets are sent out and provide resistance to the paper sheets; A paper sheet conveying device having a correction device for adjusting and correcting the skew feeding of the paper sheet, a cash processing mode for performing normal cash processing and an adjustment mode for adjusting the resistance roller. a mode changeover switch for switching the paper sheet; a plurality of detectors provided at intervals in the width direction of the conveyance path for detecting whether or not the paper sheet has passed; a determination unit that detects the conveyance state of the paper sheets and outputs data regarding the conveyance state of the paper sheets; The conveying state of the paper sheet is determined by comparing the data output from the discriminating section with preset reference data, and the determination result is displayed on the display section. A paper sheet conveying device consisting of a control section.