JP2008003678A - Cleaning tool for paper sheet discriminating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning tool for a paper sheet discriminating device, capable of easily removing magnetic body deposits attracted and stuck by the magnetized body of a magnetic sensor. <P>SOLUTION: The cleaning tool 100 is fed from the feeding port R1 of a conveying path R and carried to the conveying path R similarly to a paper sheet W. Then, the conveyed cleaning tool 100 reaches the position of a paper sheet detection sensor 3, and an abutting member 102 is brought into contact with the magnetized part (wall surface of the conveying path R) of the magnetized body 31 in the paper sheet detection sensor 3. Thus, the deposit F attracted to the magnetized part of the magnetized body 31 is removed by the abutting member 102. As a result, the deposit F attracted and stuck to the magnetized part of the magnetized body 31 is removed without opening the cover (not shown in the figure) of the paper sheet discriminating device. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a paper sheet identification apparatus for cleaning a magnetized portion of a paper sheet identification apparatus that detects residual magnetism of a magnetized paper sheet and identifies the paper sheet. Concerning ingredients.

  For example, when judging the authenticity of paper sheets such as banknotes, securities, gift certificates, magnetic cards, etc., characters, figures, symbols, etc. printed on paper sheets with printing ink containing a magnetic material The authenticity determination is performed by comparing a signal detected magnetically from the magnetic printing unit with a signal detected in advance from real paper sheets.

  In general, a magnetic sensor of a paper sheet identification device that performs authenticity determination of a paper sheet in a non-contact manner is installed in a conveyance path for conveying the paper sheet. This magnetic sensor includes, as a magnetic detection element, a magnetoresistive element whose resistance value changes according to a change in an external magnetic field, a magnetic impedance element whose impedance changes according to a change in an external magnetic field, or a thin film slack gate element.

  Among these, in the magnetic sensor of the paper sheet identification device using the magnetoresistive element, the magnetoresistive element is formed on the surface of the ceramic substrate. A magnet (magnetized body) is provided on the back side of the substrate. This magnet applies an auxiliary magnetic field in the vertical direction of the magnetoresistive element. And the weak magnetism of the magnetic printing part of paper sheets is detected by applying a magnetic field to a magnetoresistive element with a magnet (for example, refer to patent documents 1).

  Further, the magnetic sensor of the paper sheet identification device using the magneto-impedance element is such that the E-shaped magnetized bodies are arranged so that the three ends on the opened side are aligned perpendicular to the relative movement direction of the paper sheet. And arranged so as to be in contact with or in close proximity to the surface of the paper sheet. In addition, the magneto-impedance element is disposed in a plane parallel to the surface of the magnetic printing portion of the paper sheet so that the magnetosensitive direction coincides with a direction perpendicular to the relative movement direction. Further, a bias magnet is provided in the vicinity of the magnetic impedance element for applying a bias magnetic field to the magnetic impedance element so as to set the magnetic impedance element to a sensitive operating point. When detecting the magnetic printing part of the paper sheet, the magnetic printing part is magnetized by the magnetized body as the paper sheet moves, and the residual magnetic field of the magnetized part is detected by the magnetic impedance element (for example, , See Patent Document 2).

  In addition, the magnetic sensor of the paper sheet identification device using the thin film fluxgate element has the same configuration as that of the paper sheet identification device using the magnetic impedance element, so that the magnetic printing of the paper sheet is performed. Part.

JP 2003-35701 A JP 2000-105847 A

  As described above, the magnetic sensor is composed of the magnet and the magnetic detection element regardless of which magnetic detection element is used. And the magnetic quantity of the magnetic body contained in the printing ink of the magnetic printing part printed on paper sheets is very small. For this reason, in order to detect the magnetism of this magnetic body with high sensitivity, it is necessary to increase the magnetic force of the magnet. Therefore, a magnet with high volume efficiency is used for the magnet. For example, the magnet in the magnetic sensor referred to in Patent Document 1 has a magnetic force of about 150 Gauss to 300 Gauss, and the magnet in the magnetic sensor referred to in Patent Document 2 has a magnetic force of about 1 K Gauss.

  However, as described above, a magnetic sensor using a magnet, on the surface of a paper sheet or a magnetic substance deposit such as iron sand or iron powder floating in the air, due to the strong magnetic force of the magnet in an actual usage environment. It attracts magnetic substance deposits such as iron sand and iron powder. If a large amount of magnetic substance adhering to the magnetic pole surface of the magnet is attracted and adhered, the magnetic field generated by the magnet will be disturbed, resulting in false detection by the magnetic sensor, or the conveyance path will be blocked and paper sheet conveyance will be hindered. Doing so will cause clogging.

  Therefore, it is necessary to perform maintenance work for the paper sheet identification device at regular intervals and to remove the magnetic substance adhering matter attracted and adhered to the magnetic pole surface of the magnet. In a general cleaning operation, a cover of an identification unit provided with a magnetic sensor is opened, and cleaning is performed with a cotton swab soaked in water or a neutral detergent. However, since the magnetic substance adsorbed attracted to the magnetic pole surface of the magnet is always attracted by the strong magnetic force of the magnet, much labor and time are required to completely remove the adhering substance.

  In view of the above circumstances, an object of the present invention is to provide a cleaning tool for a paper sheet identification device that can easily remove a magnetic substance adhering to and attracted by a magnetized body of a magnetic sensor.

  In order to solve the above-described object, a cleaning tool for a paper sheet identification device according to claim 1 of the present invention is provided in a transport path for transporting a paper sheet having a magnetic body, and the transport path, A paper sheet having magnetizing means for applying a magnetic field to the magnetic material of the paper sheet, and a magnetic sensor comprising magnetic detecting means for detecting residual magnetism of the magnetic material of the paper sheet by applying the magnetic field of the magnetizing means A paper sheet identification device cleaning tool for cleaning a magnetized portion of the magnetic sensor according to an identification device, a base provided to be transportable on a transport path, and a base provided on the base and connected to the transport path And an abutting member that comes into contact with a magnetized portion of the magnetic sensor as the base is conveyed.

  Moreover, the cleaning tool for paper sheet identification apparatus according to claim 2 of the present invention is characterized in that, in the above-mentioned claim 1, the base portion is constituted by a magnet.

  According to the cleaning device for a paper sheet identification device of the present invention, the abutting member comes into contact with the magnetized part of the magnetic sensor and adheres to the magnetized part by transporting the base to the transport path. The kimono is removed. As a result, deposits can be easily removed without opening the cover of the paper sheet identification device.

  Exemplary embodiments of a cleaning tool for paper sheet identification apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic view schematically showing a paper sheet identification apparatus in which a cleaning tool for a paper sheet identification apparatus according to the present invention is employed. The paper sheet identification device 1 exemplified here is a character, figure, or symbol printed on the paper sheet W by a printing ink containing a magnetic material (hereinafter, these are simply referred to as “magnetic printing unit” as appropriate). Is detected in the vicinity of the transport path R for transporting the paper sheet W. The paper sheet identification apparatus 1 includes an ingress sensor 2, a paper sheet detection sensor (magnetic sensor) 3, an ingress detection unit 4, a magnetic detection unit drive unit 5, a magnetic detection circuit 6, and a signal processing circuit 7.

  The approach sensor 2 is disposed on the upstream side of the transport path R and on one side wall (upper side wall in FIG. 1) of the transport path R. The approach sensor 2 is an optical sensor such as a reflective photointerrupter, for example, and detects the entering paper sheet W in a non-contact manner.

  The paper sheet detection sensor 3 is disposed on one side wall (upper side wall in FIG. 1) of the conveyance path R on the downstream side of the entry sensor 2 in the conveyance path R. This paper sheet detection sensor 3 includes a magnetized body (magnetizing means) 31 and a magnetic detection section (magnetic detection means) 32, and a magnetic printing section printed on a paper sheet W transported along the transport path R. It detects the amount of magnetism.

  The paper sheet detection sensor 3 is configured integrally with a magnetized body 31 and a magnetic detection unit 32 housed in a case 33. The magnetized body 31 is configured, for example, by standing three square columnar permanent magnets in parallel at a predetermined interval along a direction orthogonal to the transport direction S of the paper sheet W. Here, as the permanent magnet, for example, a rare earth magnet having excellent magnetic properties such as a samarium / cobalt magnet or a neodymium magnet is used, and has a magnetic field strength higher than the coercive force of the magnetic material of the paper sheet W. is there. The permanent magnet at the center position constituting the magnetized body 31 is erected in such a manner that the magnetic pole surface on the detection side facing the conveyance path R is an S pole and the opposite side is an N pole. The permanent magnets arranged on both sides of the central permanent magnet are erected in such a manner that the magnetic pole surface on the detection side is the N pole and the opposite side is the S pole. Thereby, the magnetized body 31 is a magnetic printing part of the paper sheet W which passes the magnetic field which goes to the south pole which is the detection side of the permanent magnet of the center position from the north pole which is the detection side of the permanent magnet of both sides to the conveyance path R. To be applied.

  The magnetic detection unit 32 is provided on the downstream side of the magnetized body 31 in the transport path R. The magnetic detection unit 32 is constituted by, for example, a magnetic impedance element or a thin film fluxgate type magnetic detection element. Such a magnetic detection unit 32 is driven in an energized state based on the command signal output from the magnetic detection unit driving unit 5, and the magnetic printing unit of the paper sheet W is tinged by application by the magnetized body 31. The magnetic field generated by the residual magnetism is detected. A magnetic shield member (not shown) is provided around the magnetic detection unit 32. The magnetic shield member is made of, for example, permalloy, amorphous, or the like, and is for suppressing the magnetic field spreading from the magnetized body 31.

  The case 33 is a housing that houses the magnetized body 31, the magnetic detection unit 32, and the like. The case 33 is made of a material such as a resin that transmits a magnetic field and is a non-magnetic material.

  The entry detection unit 4 is connected to the entry sensor 2 and detects the entry of the sheet W based on the signal output by the entry sensor 2 detecting the entry of the sheet W.

  The magnetic detection unit driving unit 5 is connected to each of the entry detection unit 4 and the magnetic detection unit 32, and based on the signal output by the entry detection unit 4 detecting the entry of the paper sheet W, the magnetic detection unit 32. A command signal for driving the motor is output.

  The signal processing circuit 7 is connected to the magnetic detection unit 32 through the magnetic detection circuit 6, and is compared with a reference value stored in advance based on a detection signal output by the magnetic detection unit 32 detecting a magnetic field. The authenticity of the paper sheet W is determined by determining whether it is within the allowable range.

  FIG. 2 is a schematic cross-sectional side view showing the transport system of the paper sheet identification apparatus 1 described above. As shown in FIG. 2, the transport path R has an insertion port R <b> 1 that opens toward the front of the paper sheet identification device 1. The paper sheet W is input from the input port R1. In addition, the transport path R has an upstream portion R2 that faces backward from the input port R1 and faces the transport direction S upward from there. Further, the transport path R has a downstream portion R3 that is folded back from the upper end of the upstream portion R2 and faces the transport direction S downward. And in the lower end of downstream part R3, storage R4 for storing the paper sheet W conveyed to the conveyance path R is provided. In such a conveyance path R, conveyance rollers R5 and R6 that constitute conveyance means are provided at the folded portion between the upstream portion R2 and the downstream portion R3 and the lower end portion of the downstream portion R3 before the storage R4. It is. The conveying roller R5 provided in the turning portion between the upstream portion R2 and the downstream portion R3 exposes the outer peripheral surface to the upstream portion R2 and the downstream portion R3, and each of the driven rollers constituting the conveying means by the exposed portion. It is in contact with R7 and R8. Further, the conveying roller R6 provided at the lower end of the downstream portion R3 in front of the storage R4 has an outer peripheral surface exposed to the downstream portion R3, and this exposed portion is in contact with the driven roller R9 constituting the conveying means. Yes. The transport rollers R5 and R6 are rotationally driven in conjunction with a drive source (not shown) such as a drive motor. When the transport rollers R5, R6 are driven to rotate, the driven rollers R7, R8, R9 are driven accordingly.

  In the transport system, the approach sensor 2 is provided in the upstream portion R2 from the input port R1 to the portion where the transport roller R5 and the driven roller R7 come into contact. Further, in the transport system, the paper sheet detection sensor 3 is provided in a downstream portion R3 between a portion where the transport roller R5 and the driven roller R8 are in contact with a portion where the transport roller R6 and the driven roller R9 are in contact. .

  In such a transport system, the paper sheet W input from the input port R1 comes into contact with the transport roller R5 that is driven to rotate in the forward rotation (counterclockwise in FIG. 2) direction in the upstream portion R2. The paper is conveyed in the conveying direction S (upward) while being sandwiched between the driven rollers R7. Then, the paper sheet W is sandwiched between the transport roller R5 that is driven to rotate counterclockwise in FIG. 2 and the driven roller R8 that is in contact with the transport roller R5 at the upper end of the downstream portion R3, and the transport direction S (downward). It is conveyed toward. further. The paper sheet W is conveyed at the lower end of the downstream portion R3 to the storage R4 while being sandwiched between a conveying roller R6 that is driven to rotate counterclockwise in FIG. 2 and a driven roller R9 that is in contact with the conveying roller R6. The transport rollers R5 and R6 are also driven to rotate in the reverse direction (clockwise in FIG. 2). For example, when the paper sheet W is a container, the transport rollers R5 and R6 are rotationally driven in the reverse direction and are carried out from the insertion port R1.

  The paper sheet identification device 1 determines the authenticity of the paper sheet W conveyed as follows.

  When the paper sheet W transported by the transport means is input from the input port R1 of the transport path R, the ingress sensor 2 detects it and outputs it as a signal to the ingress detection unit 4 to detect that it has entered. The When the signal indicating that the sheet W has entered the magnetic detection unit driving unit 5 is output from the entry detection unit 4, the magnetic detection unit driving unit 5 drives the magnetic detection unit 32 of the paper sheet detection sensor 3. A command is output, and the magnetic detection unit 32 is energized and driven. Further, the transport rollers R5 and R6 of the transport means are rotationally driven in the forward rotation direction.

  When the sheet W reaches the downstream portion R3 that has entered the conveyance path R and reaches the region where the magnetic field of the magnetized body 31 reaches, the sheet detection sensor 3 is centered from the N poles of the permanent magnets on both sides of the magnetized body 31. A magnetic field toward the south pole of the permanent magnet at the position is applied through the case 33 to magnetize the magnetic printing portion of the paper sheet W. The paper sheet W in which the magnetic printing unit is magnetized is conveyed on the conveyance path R as it is.

  Then, the magnetic detection unit 32 in the energized state detects a magnetic field generated by the residual magnetism of the magnetic printing unit, and outputs the detection result as a detection signal to the signal processing circuit 7 through the magnetic detection circuit 6, and then the energized state. Is released and the camera enters a standby state. In the signal processing circuit 7, based on the detection signal output from the magnetic detection unit 32, it is compared with a reference value stored in advance to determine whether it is within a predetermined allowable range, and the authenticity of the paper sheet W is determined. Determine.

  In such a paper sheet identification device 1, magnetic substance deposits such as iron sand and iron powder floating in the conveyance path R by the magnetic force of the magnetized body 31 (hereinafter, these are simply referred to as “adhesions” as appropriate). F and adhering matter F adhering to the paper sheet W are sucked. The deposit F attracted by the magnetized body 31 adheres to the wall surface of the conveyance path R, which is the magnetized portion of the magnetized body 31, as shown in FIG.

  Hereinafter, the cleaning tool employ | adopted for the paper sheet identification device 1 mentioned above is demonstrated. FIG. 3 is a schematic view showing the cleaning tool for paper sheet identification apparatus according to the present invention. The cleaning tool 100 here includes a base 101 and a contact member 102.

  The base 101 is the same size as the paper sheet W, is formed in a sheet shape or a plate shape having the same thickness, and is configured to be transportable on the transport path R. As shown in FIG. 2, the base 101 can be transported to a winding transport path R and is formed of rubber, synthetic rubber, synthetic resin or the like having flexibility. In particular, the base 101 is preferably a permanent magnet.

  The contact member 102 is provided on the outer peripheral surface of the base 101. The contact member 102 is made of a fiber made of a synthetic resin material such as nylon (R), animal hair, or a nonwoven fabric. When the base 101 is transported to the transport path R, the abutting member 102 contacts the magnetized portion (the wall surface of the transport path R) where the magnetized body 31 in the paper sheet detection sensor 3 faces the transport path R. The contact member 102 preferably has elasticity so that it can come into contact with the magnetized portion of the magnetized body 31 as appropriate.

  Like the paper sheet W, such a cleaning tool 100 is loaded from the loading port R1 of the conveyance path R and conveyed to the conveyance path R. Then, as shown in FIG. 4A, the conveyed cleaning tool 100 reaches the position of the paper sheet detection sensor 3. Then, the abutting member 102 comes into contact with the magnetized portion (the wall surface of the transport path R) of the magnetized body 31 in the paper sheet detection sensor 3 as the base 101 moves. For this reason, as shown in FIG. 4B, the adhering substance F attracted to the magnetized portion of the magnetized body 31 is removed by the contact member 102. As a result, it is possible to remove the adhering matter F attracted and adhered to the magnetized portion of the magnetized body 31 in the paper sheet detection sensor 3 without opening a cover (not shown) of the paper sheet identifying device 1. Become. Therefore, the magnetic field of the paper sheet W applied by the magnetized body 31 does not fluctuate greatly, and the residual magnetism of the paper sheet W can be detected well.

  Furthermore, in the cleaning tool 100 described above, the base 101 is made of a permanent magnet. For this reason, as shown in FIG. 4C, the deposit F wiped off by the contact member 102 is sucked into the base 101 and collected. As a result, it is possible to prevent the deposit F removed by the contact member 102 from being attracted again by the magnetic force of the magnetized body 31 and attached to the magnetized portion of the magnetized body 31. Therefore, the magnetic field of the paper sheet W applied by the magnetized body 31 does not fluctuate greatly, and the residual magnetism of the paper sheet W can be detected well.

  Further, the cleaning tool 100 is attached to the adhering matter F adhering to the conveyance path R and each of the rollers R5, R6, R7, R8, and R9, and to the conveyance path R and each of the rollers R5, R6, R7, R8, and R9. Also removes non-magnetic deposits. As a result, the paper sheet W that has passed through the transport path R can be kept clean. Further, by removing the deposits on each of the rollers R5, R6, R7, R8, and R9, the paper W is clogged due to a decrease in the conveyance force due to contamination on the roller surface, or the conveyance balance due to contamination on the roller surface. This prevents a situation where the paper sheet W is skewed due to the decrease in the height of the paper sheet and the paper sheet W is clogged, and a highly reliable paper sheet identification device can be provided.

It is the schematic which showed typically the paper sheet identification device by which the cleaning tool for paper sheet identification devices which concerns on this invention is employ | adopted. It is a schematic sectional side view which shows the conveyance system of paper sheet identification device. It is the schematic which shows the cleaning tool for paper sheet identification devices which concerns on this invention. It is the schematic which shows the effect | action of the cleaning tool for paper sheet identification devices.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper sheet identification device 2 Ingress sensor 3 Paper sheet detection sensor 31 Magnetized body 32 Magnetic detection part 33 Case 4 Ingress detection part 5 Magnetic detection part drive part 6 Magnetic detection circuit 7 Signal processing circuit 100 Cleaning tool 101 Base 102 Contact Member F Deposit R Transport path R1 Input port R2 Upstream part R3 Downstream part R4 Storage R5, R6 Transport roller R7, R8, R9 Driven roller S Transport direction W Paper sheet

Claims (2)

A transport path for transporting a paper sheet having a magnetic material;
A magnetizing means for applying a magnetic field to the magnetic material of the paper sheet, and a magnetic detecting means for detecting residual magnetism of the magnetic material of the paper sheet by applying the magnetic field of the magnetizing means; A paper sheet identification device having a magnetic sensor, and a cleaning tool for a paper sheet identification device for cleaning a magnetized portion of the magnetic sensor,
A base provided to be transportable in the transport path;
A cleaning device for a paper sheet identification device, comprising: a contact member provided on the base and contacting a magnetized portion of the magnetic sensor as the base is transported to the transport path.   The said base part was comprised with the magnet, The cleaning tool for paper sheet identification apparatuses of Claim 1 characterized by the above-mentioned.

Images