JPH06162311A - Paper currency identifying device - Google Patents

Abstract

PURPOSE:To improve the capability of the paper currency identifying device to decide whether or not paper currency is authentic CONSTITUTION:This device is provided with a magnetic head 28 nearer the side of an insertion slot 23 than a photosensor 29. Even if the paper currency slips when the tip part of the paper currency rushes to the magnetic head 28 while a conveyor belt 27 is stained with powdery dust, etc., and the conveying capacity for the paper currency is decreased, the tip part of the paper currency is at a position where it does not reach the optical photosensor 29. Namely, the paper currency 32 does not being to be identified yet, so when feature data at a predetermined paper currency position are measured, the influence of the conveyance slip at the time of the rush to the magnetic head 28 does not appear, so the acceptance rate of genuine money is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bill validator used in a vending machine or the like.

[0002]

2. Description of the Related Art In recent years, the number of vending machines equipped with a bill validator has been increasing with the diversification and price increase of products sold by vending machines. An automatic vending machine is often arranged outdoors, and a bill validator used in such an automatic vending machine is required to have excellent bill authenticity determination ability even under various environmental conditions.

A conventional bill validator will be described below with reference to the drawings. FIG. 5 is a front view of the conventional bill validator when the lid for opening and closing the side face is opened. In FIG. 5, reference numeral 73 denotes a bill insertion opening provided on the front surface of the bill identification device 71. A bill passage 74 is connected to the insertion opening 73, and a bill outlet is provided at a rear end of the passage 74. 7
5 are connected. And the insertion port 73 of the passage 74
An entrance sensor 76 for detecting the insertion of bills is provided on the side wall of the. Further, on the side wall of the passage 74, there are a conveyor belt 77 for conveying the bill inserted up to the entrance sensor 76 toward the outlet 75, and a detection means for identifying the bill conveyed by the conveyor belt 77. An optical sensor 78 is laid on the side wall of the passage 74 at the substantially central portion of the conveyor belt 77. In addition, the magnetic head 79
Are laid on the side walls at both ends of the passage 74 on the same line with respect to the central position of the optical sensor 78 and the bill transport direction. Further, reference numeral 80 denotes a conveyance motor, which transmits power to the conveyance belt 77 via the gear block 81.

The operation of the bill discriminating apparatus constructed as above will be described below. First, by inserting a bill from the insertion slot 73, the bill is detected by the entrance sensor 76, and by the bill detection by the entrance sensor 76,
The transport motor 80 is normally rotated, and the transport belt 77 is driven by the power of the transport motor 80. The transport belt 77 guides the bill into the passage 74. The optical sensor 78 is used as a starting point when the tip of the bill reaches the optical sensor 78.
The bill is identified by the magnetic head 79, and the bill is conveyed by the conveyor belt 77, and the bill is identified until the end of the bill passes the optical sensor 78. Next, the authenticity of the bill is determined based on the result of identifying the bill, and if it is a genuine bill, a genuine bill signal is output to return to the standby state. If it is determined that the bill is a counterfeit bill, the transport motor 80 is rotated in the reverse direction, the bill is discharged from the identification passage 74 by the transport belt 77, and then the standby state is restored.

[0005]

However, in such a conventional structure, when the conveyor belt 77 is contaminated with dust or the like, when the front end of the banknote rushes into the magnetic head 79 due to a decrease in the banknote conveying force, The slip of the bill occurs due to the change of the load by the magnetic head 79. However, at this time, since the bills are already identified by the optical sensor 78, the characteristic data of the predetermined bill position cannot be correctly measured. Therefore, there has been a problem that the acceptance rate of genuine bills decreases.

The present invention solves such a problem, and reduces the acceptance rate of genuine bills even if the conveyance belt is contaminated with dust or the like and the bill conveyance force is reduced, causing a slip of bills. The purpose is not to let.

[0007]

In order to achieve this object, the bill discriminating apparatus of the present invention has a structure in which a magnetic head is provided on the insertion opening side of an optical sensor.

[0008]

[Operation] With this configuration, the conveyor belt becomes dirty with dust or the like,
Even when slipping of the bill occurs when the bill transporting force is reduced and the bill leading end plunges into the magnetic head, the bill leading end is at a position not reaching the optical sensor. That is, it is a state in which the identification of bills is not started. Therefore, when the characteristic data of the predetermined banknote position is measured, the banknote has already passed through the magnetic head and has reached the optical sensor, so that there is no influence of the transport slip when the magnetic head enters. Therefore, the acceptance rate of genuine bills does not decrease.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 4 is a perspective view of a bill validator according to one embodiment of the present invention, and FIG. 1 is a front view when a lid for opening and closing the side face is opened.

In FIG. 1, reference numeral 23 denotes a bill insertion slot provided on the front surface of the bill validator 21.
A bill passage 24 is connected to the bill passage, and a bill outlet 25 is connected to the rear end of the passage 24. An entrance sensor 26 for detecting the insertion of banknotes is arranged on the side wall of the insertion opening 23 of the passage 24. In addition, this passage 2
A conveyor belt 27 (used as an example of a conveyor) that conveys the bill inserted into the entrance sensor 26 toward the outlet 25 on the side wall of 4 and identifies the bill conveyed by the conveyor belt 27. An optical sensor 29, which is a detection unit for detecting the optical path, is installed on the side wall of the passage 24 at the substantially central portion of the conveyor belt 27. In addition, the magnetic head 28
Is laid on the side wall of the passage 24 on the insertion port 23 side of the optical sensor 29. The distance between the magnetic head 28 and the optical sensor 29 is set to be shorter than the distance from the end face in the longitudinal direction of the bill to the magnetically printed position. Also,
A conveyance motor 30 transmits power to the conveyance belt 27 via the gear block 31.

FIG. 2 is a block diagram of a bill validator according to an embodiment of the present invention. In FIG. 2, 32 is a bill to be discriminated, and 26 is an entrance sensor for detecting that the bill 32 is inserted into the entrance. Further, 27 is a conveyor belt composed of a belt for conveying the banknotes 32, a motor 30 as a drive means for driving the conveyor belt 27, and a detection means 39 for detecting the amount of the banknotes 32 conveyed.
, An optical sensor 29 for identifying the optical printing pattern of the bill 32, an amplifying means 35 for amplifying an output signal of the optical sensor 29, and an analog / digital converting means for converting the output signal of the amplifying means 35 into a digital amount ( Below A /
D conversion means) 36, a magnetic head 28 for identifying a magnetic printing pattern of a bill, an amplification means 37 for amplifying the output signal of the magnetic head 28, and a waveform shaping means for shaping the output signal of the amplification means 37. 38, a reference value storage means 40 in which the measurement position of the bill 32 and its allowable range data are stored, an output signal of the A / D conversion means 36, an output signal of the waveform shaping means 38, and the detection means 39. A discriminating means 41 for discriminating a bill from an output signal and an output signal of the reference value storing means 40, and a control means 42 for controlling the conveying means 27 according to the output signal of the discriminating means 41.
It has and.

Then, the output signal of the A / D conversion means 36 used for discrimination by the discrimination means 41 and the waveform shaping means 3
The bill 32 is discriminated by using the characteristic data of the predetermined bill position of the output signal of No. 8.

The operation of the bill discriminating apparatus configured as described above will be described with reference to the flow charts of FIGS. 1, 2 and 3.

When the bill 32 is inserted and the bill 32 is detected 52 by the entrance sensor 26 at the entrance,
A motor forward rotation signal is output from the control means 42 to the motor 30.
Then, the conveyor belt 27 is normally rotated by the power of the motor 30, and the bill 32 is guided into the identification passage 24. Banknote 32
After the leading edge of the banknote 32 has passed the magnetic head 28, the identification 55 is started from the time when the leading edge of the bill 32 reaches the optical sensor 29, and the rear end of the bill 32 is detected by the optical sensor 29.
Of the bills 32 stored in the reference value storing means 40 based on the signal from the detecting means 39 until the bill passes through 56.
The optical sensor 29 and the magnetic head 28 measure optical and magnetic characteristics of the bill 32 at a predetermined bill position. Then, this measurement data is determined by the determination means 4
Store in 1.

At the time when the rear end of the bill 32 passes the optical sensor 29, the motor 30 is stopped 57 and the bill 32
The determination means 41 compares the predetermined characteristic data of the banknote position with the allowable range data of the reference value storage means 40 to determine whether the bill is a genuine bill or a counterfeit bill 58.

If it is determined that the bill is genuine, a genuine bill signal 59 is output and the standby state 51 is restored. If it is determined that the bill is a counterfeit note, a motor reverse signal is output from the control means 42, the motor 30 is reversed, the bill 32 is discharged 60 from the identification passage 24, and the motor 30 is returned to the standby state 51 after being stopped.

As described above, according to this embodiment, since the magnetic head 28 is provided closer to the insertion port 23 side than the optical sensor 29, the leading end of the banknote is not affected by the conveyance slip when the magnetic head 28 is inserted, which is correct. There is an effect that measurement data can be obtained.

The distance between the magnetic head 28 and the optical sensor 29 of this embodiment is set shorter than the distance from the longitudinal end face of the bill 32 to the magnetically printed position. Therefore, when the leading edge of the banknote 32 reaches the optical sensor 29, the magnetic printing surface of the banknote 32 becomes the magnetic head 2.
8 has not been reached. That is, since the magnetic printing pattern is identified by the magnetic head 28 after the bill 32 is identified by the optical sensor 29, the entire magnetic printing pattern on the entire bill can be identified from the beginning.

[0019]

As described above, according to the bill discriminating apparatus of the present invention, since the magnetic head is provided on the insertion opening side of the optical sensor, the conveying belt is contaminated with dust or the like, and the bill conveying force is lowered. Even when slippage of a bill occurs when the bill tip enters the magnetic head, the bill tip does not reach the optical sensor. That is, since the identification of bills is not started, when measuring the characteristic data of the predetermined bill position, the influence of the transport slip at the time of the magnetic head entering does not appear, so the acceptance rate of genuine bills It is possible to realize an excellent bill recognition ability without deteriorating.

[Brief description of drawings]

FIG. 1 is a front view for explaining a sensor arrangement of a bill validator according to an embodiment of the present invention.

FIG. 2 is a block diagram of a bill validator according to an embodiment of the present invention.

FIG. 3 is a flowchart for explaining the operation of the bill validator according to the embodiment of the present invention.

FIG. 4 is a perspective view of a bill validator according to an embodiment of the present invention.

FIG. 5 is a front view for explaining a sensor arrangement of a conventional bill validator.

[Explanation of symbols]

 23 Insertion Port 24 Passage 27 Conveyor Belt 28 Magnetic Head 29 Optical Sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kojiro Iida 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. A bill insertion slot, a passage connected to this insertion slot, a conveyance means provided in this passage, a magnetic head and a bill for identifying a magnetic printing pattern of the bill provided on the wall surface of the passage. And an optical sensor for identifying the optical printing pattern, wherein the magnetic head is provided on the insertion opening side of the optical sensor. 2. The bill validator according to claim 1, wherein the distance between the magnetic head and the optical sensor is shorter than the distance from the end face in the longitudinal direction of the bill to the position where magnetic printing is performed.