JP2018032238A - Paper sheet discrimination device and automatic handling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce influence of magnetic noise.SOLUTION: A paper sheet discrimination device comprises: a first conveyance guide 41 which forms a conveyance path where paper sheets BL are conveyed; a second conveyance guide 42 which is arranged opposite the first conveyance guide across the conveyance path, and conveys the paper sheets BL on the conveyance path; and a magnetic information acquisition part 71 which acquires magnetic information on the paper sheets BL conveyed by the conveyance means. The paper sheet discrimination device also has: first magnetic shield means 73a surrounding at least the magnetic information acquisition part 71 and having ends 73A, 73B provided to the first conveyance guide 41; and second magnetic shield means 74a having ends 74A, 74B provided to the second conveyance guide 42, and being close to the ends 73A, 73B of the first magnetic shield means 73a.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a paper sheet discrimination device and an automatic transaction device.

  In general, an automatic transaction apparatus such as an automatic teller machine or a cash processing machine includes a paper sheet discrimination device for discriminating the denomination and authenticity of a banknote to be processed. The paper sheet discrimination device includes an image sensor that optically detects an image of a banknote, a magnetic sensor that detects a magnetic reaction of the banknote, and the like, and determines the denomination and authenticity of the banknote based on information obtained by these sensors. It is configured to distinguish.

  Patent document 1 is disclosing the magnetic shielding board formed so that the magnetic sensor provided in the upper part of the conveyance path might be surrounded from the front and back, and three directions of the upper part. Patent Document 2 discloses an attachment member for attaching a magnetic sensor to an upper conveyance guide, and the attachment member is formed with a thin portion.

JP2013-254525A (FIGS. 10 and 11) Japanese Patent Laying-Open No. 2015-69424 (FIG. 10)

The magnetic shielding plate described in Patent Document 1 is formed in a U-shaped cross section (U-shape) and is attached only to the upper part of the conveyance path. For this reason, the magnetic noise which comes from the lower side of the conveyance path affects the magnetic sensor without being shielded.
In addition, since the technique of patent document 2 has the structure which attaches the attachment member which attaches a magnetic sensor to a conveyance guide, a level | step difference will be formed between this attachment member and a conveyance surface.

  An object of the present invention is to provide a paper sheet discrimination apparatus and an automatic transaction apparatus that can reduce the influence of magnetic noise.

  In order to solve the above-described problem, the paper sheet discrimination apparatus according to the present invention includes a first transport guide (41) that forms a transport path through which a paper sheet is transported, and the first transport across the transport path. A second conveyance guide (42) disposed opposite to the guide and forming the conveyance path, a conveyance means (38, 39) for conveying the paper sheets on the conveyance path, and conveyed by the conveyance means A magnetic information acquisition unit (71) for acquiring magnetic information of the paper sheet, and surrounds at least the magnetic information acquisition unit and has an end provided on the first conveyance guide. (73) and end portions (74A, 74B) are provided in the second transport guide, and the end portions are adjacent to the end portions (73A, 73B) of the first magnetic shielding means. Magnetic shielding means (74). In addition, the code | symbol in () is an illustration.

  The first magnetic shielding means is provided in the first conveyance guide, and the second magnetic shielding means is provided in the second conveyance guide, and the end portion of the first magnetic shielding means and the second magnetic shielding means are provided. It is close to the end of the. For this reason, the 1st magnetic shielding means and the 2nd magnetic shielding means can surround a magnetic information acquisition part, ensuring the space which passes a paper sheet. Here, the first magnetic shielding means and the second magnetic shielding means are formed of a plate-like magnetic metal (for example, an iron plate), and the plate-like magnetic metal of the first magnetic shielding means is in the transport direction. Two sides perpendicular to the first conveyance guide are provided in the first conveyance guide, and the plate-like magnetic metal of the second magnetic shielding means has two sides perpendicular to the conveyance direction provided in the second conveyance guide. Yes. The magnetic information acquisition unit is surrounded by the first magnetic shielding means on the opposite side of the first conveyance guide.

  According to the present invention, the influence of magnetic noise can be reduced.

It is a block diagram of the paper sheet discrimination | determination apparatus which is 1st Embodiment of this invention. It is the figure which looked at the upper conveyance guide of the paper sheet discrimination device from the upper direction. It is the figure which looked at the lower conveyance guide of the paper sheet discrimination device from the upper direction. It is the block diagram of an upper magnetic shield, and an attachment figure. It is sectional drawing of a magnetic detection part. It is the perspective view and sectional drawing of a magnetic gap roller. It is sectional drawing of the magnetic detection part for demonstrating the fixing mechanism of a magnetic gap roller. It is explanatory drawing explaining magnetic field distribution when a paper sheet tries to pass a magnetic information acquisition part. It is explanatory drawing explaining magnetic field distribution when paper sheets are passing the magnetic information acquisition part. It is an external view of the automatic transaction apparatus which is 1st Embodiment of this invention. It is a block diagram of the banknote depositing / withdrawing part which is 1st Embodiment of this invention. It is a block diagram of the paper sheet discrimination | determination apparatus which is a comparative example of this invention. It is a structure figure of the magnetic gap roller which is a comparative example of this invention. It is a time change figure of the output value of a magnetic change detection part. It is a block diagram of the paper sheet discrimination | determination apparatus which is 2nd Embodiment of this invention. It is a block diagram of the paper sheet discrimination | determination apparatus which is 3rd Embodiment of this invention.

  Hereinafter, an embodiment of the present invention (hereinafter referred to as “the present embodiment”) will be described in detail with reference to the drawings. In addition, each figure is only shown roughly to such an extent that this embodiment can fully be understood. Therefore, the present invention is not limited to the illustrated example. Moreover, in each figure, the same code | symbol is attached | subjected about the common component and the same component, and those overlapping description is abbreviate | omitted.

(First embodiment)
[Configuration of paper sheet discrimination device]
FIG. 1 is a configuration diagram of a paper sheet discrimination apparatus according to the first embodiment of the present invention, and is also a cross-sectional view seen from a side surface.
The paper sheet discrimination device 18 is provided in an automatic transaction device such as an automated teller machine (ATM) or a cash deposit / withdrawal machine (see FIGS. 10 and 11). The paper sheet discriminating device 18 discriminates the denomination and authenticity of the banknote BL, the degree of damage (correctness), and the like using an optical element, a magnetic detection element, and the like while conveying the banknote BL. This is to detect a running abnormality during conveyance such as a skew angle or a chain. Further, the paper sheet discrimination device 18 moves the banknote BL, which is a medium, in the forward direction along the substantially horizontal transport surface 43 based on the control of the control unit 12 in the rectangular parallelepiped discrimination housing (frame 40). Alternatively, it is configured to be conveyed in the backward direction.

  The paper sheet discrimination device 18 includes a frame 40, an upper conveyance guide 41 as a first conveyance guide, a lower conveyance guide 42 as a second conveyance guide, and drive rollers 38a, 38b, and 38c as conveyance means. And driven rollers 39a, 39b, and 39c, a thickness information acquisition unit 50, an optical information acquisition unit 60, a magnetic detection unit 70, and a control unit 12. The modules of the magnetic detection unit 70, the optical information acquisition unit 60, and the thickness information acquisition unit 50 are sequentially arranged from the front side to the rear side. A space between the lower surface of the upper conveyance guide 41 and the upper surface of the lower conveyance guide 42 is referred to as a conveyance path.

  The frame 40 is a resin casing composed of an upper frame 40A (40Aa) and a lower frame 40B (40Ba). In addition, the inner surface of the resin casing is subjected to electromagnetic shielding of aluminum vapor deposition or aluminum plating. The lower frame 40B is provided with an open support shaft 31 via a support shaft mounting plate 31A, and the upper frame 40A is attached to be freely opened and closed. The lower frame 40B includes a lower conveyance guide 42 provided with a convex lower opening / closing fitting portion 33. On the other hand, the upper frame 40A includes an upper conveyance guide 41 provided with a hole-shaped upper opening / closing fitting portion 32. Thereby, when the upper frame 40 </ b> A is closed, the frame 40 is fitted with the convex portion of the lower opening / closing fitting portion 33 and the hole portion of the upper opening / closing fitting portion 32.

  The conveyance surface 43 is a nipping surface between the driving rollers 38 a, 38 b, 38 c and the driven rollers 39 a, 39 b, 39 c and also a nipping surface between the thickness reference roller 51 and the thickness detection roller 52. Is located at the midpoint between the lower surface of the lower conveyance guide 42 and the upper surface of the lower conveyance guide 42.

  The control unit 12 includes a CPU (Central Processing Unit), a FROM (Flash Read Only Memory), and a RAM (Random Access Memory), and executes a program stored in the FROM which is a nonvolatile storage unit.

  The magnetic detection unit 70 includes a magnetic sensor 71 as a magnetic information acquisition unit, a magnetic gap roller 72 (72a), an upper magnetic shield 73 (73a), and a lower magnetic shield 74 (74a), and includes an upper magnetic shield. 73 covers the front and rear direction and the upper side of the magnetic sensor 71, and the lower magnetic shield 74a covers the front and rear direction and the lower side of the magnetic gap roller 72a. The magnetic sensor 71 includes a magnetic change detection unit 71 </ b> B and a bias magnet 71 </ b> C, and a lower part is embedded in the upper conveyance guide 41. Therefore, the upper conveyance guide 41 is formed with a thin portion 41A (FIGS. 5, 7, 8, and 9) below the magnetic sensor 71, and the thin portion 41A is integrally formed when the upper conveyance guide 41 is formed. Yes. Thereby, since the lower surface of the upper conveyance guide 41 is flat and does not have a level | step difference, the banknote BL can be conveyed smoothly.

  The driving rollers 38a, 38b, 38c, the thickness reference roller 51, and the magnetic gap roller 72a are rotated by a driving force transmitted from an actuator (not shown). At this time, the driven rollers 39a, 39b, and 39c and the thickness detecting roller 52 are rotated by the rotation of the corresponding rollers while pressing the bill BL against the corresponding driving rollers 38a, 38b, and 38c and the thickness reference roller 51. To do. Thereby, the paper sheet identification device 18 conveys the banknote BL along the conveyance surface 43.

  The upper magnetic shield 73a and the lower magnetic shield 74a are iron plates (plate-like magnetic metal) formed by bending two rectangular sides (two sides perpendicular to the transport direction), and are U-shaped in cross-section (substantially U-shaped). Is formed. The upper magnetic shield 73a and the lower magnetic shield 74a are an upper magnetic shield end 73A (FIGS. 2, 4, 8) and a lower magnetic shield end 74A (FIGS. 3, 8), which are U-shaped ends. Are disposed close to each other, and the upper magnetic shield end portion 73B (FIGS. 2, 4 and 8) and the lower magnetic shield end portion 74B (FIGS. 3 and 8) are disposed close to each other.

  The upper magnetic shield end portions 73A and 73B are inserted into a concave portion 41C (FIG. 4C) formed linearly on the upper transport guide 41. Here, the upper magnetic shield 73a and the upper conveyance guide 41 are fastened with screws 77 (FIG. 4C) as fastening members, or the upper magnetic shield end portions 73A and 73B and the concave portion 41C are bonded with an adhesive. Or are stuck together. The upper conveyance guide 41 and the upper magnetic shield 73a may be fixed using either one or both of the screw 77 and the adhesive. Similarly, the end portions of the lower magnetic shield 74a (lower magnetic shield end portions 74A and 74B) are inserted into and secured to the concave portions 42C formed in the lower conveyance guide 42. The upper conveyance guide 41 and the lower conveyance guide 42 are fixed to the upper magnetic shield 73a and the lower magnetic shield 74a, thereby increasing rigidity.

2 is a view of the upper conveyance guide 41 of the paper sheet discrimination device 18 as viewed from above, and FIG. 3 is a view of the lower conveyance guide 42 of the paper sheet discrimination device 18 as viewed from above. .
In FIG. 2, the magnetic sensor 71 is indicated by a broken line, and the upper magnetic shield 73a is indicated by a solid line. In FIG. 3, a plurality of holes into which the roller 72B (FIG. 6) of the magnetic gap roller 72 is inserted open in the left-right direction, and the lower magnetic shield 74a is indicated by a broken line. The upper magnetic shield 73a has a plurality of attachment portions 73E extending and is configured to be fastened to the upper conveyance guide 41. The lower magnetic shield 74a has a plurality of attachment portions 74E extending therein and is configured to be fastened to the lower conveyance guide 42. The upper magnetic shield 73 and the lower magnetic shield 74 are longer in the left-right direction than the magnetic sensor 71.

4 is a configuration diagram and an attachment diagram of the upper magnetic shield, FIG. 4 (a) is a plan view of the upper magnetic shield 73a, FIG. 4 (b) is a side view thereof, and FIG. c) is an AA sectional view as an attachment view, and FIG. 4D is a BB sectional view.
The upper magnetic shield 73a is an iron plate formed in a U-shape in cross section (substantially U-shaped), and is spaced apart in the height direction from the end portions (upper magnetic shield end portions 73A and 73B), and a plurality of mounting portions 73E. Is formed. The attachment portion 73E is substantially square and has a hole 73Ea into which a screw 77 as a fastening member is inserted.

  In the AA sectional view of FIG. 4C, a screw mounting portion 41D and a recess 41C are formed. That is, the upper conveyance guide 41 is configured such that the screw attachment portion 41D and the attachment portion 73E of the upper magnetic shield 73a are fastened by the screw 77, and the upper magnetic shield end portions 73A and 73B and the concave portion 41C are fixed by an adhesive. Has been.

FIG. 5 is a cross-sectional view of the magnetic detection unit.
As described above, the magnetic detection unit 70 includes the upper magnetic shield 73a and the lower magnetic shield 74a inside the upper frame 40A and the lower frame 40B, and the inside of the upper magnetic shield 73a and the lower magnetic shield 74a. In addition, a magnetic sensor 71 and a magnetic gap roller 72 are provided.

  The magnetic gap roller 72 is held by the lower conveyance guide 42 or its peripheral member so as to be movable in the vertical direction and rotatable, and is urged upward by the urging member 75. The magnetic sensor 71 is covered at least in the front-rear direction by the upper magnetic shield 73a, and the magnetic gap roller 72 is covered at least by the lower magnetic shield 74a in the front-rear direction. The upper conveyance guide 41 is formed with a thin portion 41 </ b> A and faces the lower conveyance guide 42.

FIG. 6 is a perspective view and a sectional view of the magnetic gap roller.
The magnetic gap roller 72 includes a shaft 72A (72Aa) formed in a rod shape from a nonmagnetic metal material such as austenitic stainless steel, and a plurality of cylindrical rollers 72B (72Ba) formed of rubber-based elastic members. It is configured. A plurality of groove shapes 72BB are formed in the inner diameter portion of the roller 72Ba, and the shaft 72Aa and the plurality of rollers 72Ba are fixed by an adhesive filled in the plurality of groove shapes 72BB.

FIG. 7 is a cross-sectional view of a magnetic detection unit for explaining a magnetic gap roller fixing mechanism.
The magnetic detection unit 70 further includes a bearing 76 that rotatably holds the magnetic gap roller 72 and an urging member 75 that urges the bearing 76 upward, and a locking portion 41B is formed on the upper frame 40A. Has been. In the bearing 76, the lower end of the outer ring is urged from the urging member 75 so that the inner ring holds the shaft 72A and the upper end of the outer ring is locked to the locking portion 41B. The biasing member 75 is a compression spring whose one end is fixed to the lower frame 40 </ b> B and the other end presses the lower end of the bearing 76. Thereby, the outer peripheral surface of the plurality of rollers 72B and the thin portion 41A are configured so as to leave a slight gap.

  FIG. 8 is an explanatory diagram for explaining the magnetic field distribution when the paper sheet is about to pass through the magnetic information acquisition unit. That is, the bill BL as a paper sheet is conveyed to the inside of the upper magnetic shield 73a and the lower magnetic shield 74a, but does not reach the magnetic sensor 71. The bill BL is coated with a magnetic paint on a part of its surface, and the magnetic paint serves as a means for separating and removing counterfeit bills.

  The bias magnet 71C provided in the magnetic sensor 71 is a permanent magnet that generates magnetic lines of force 71Ca1, 71Ca2, 71Cb1, 71Cb2. Magnetic field lines 71Ca1 and 71Cb1 come out of the N pole of the bias magnet 71C, link the magnetic change detection unit 71B, and return to the S pole of the bias magnet 71C. Further, the magnetic lines of force 71Ca2 and 71Cb2 come out of the N pole of the bias magnet 71C and return to the S pole of the bias magnet 71C without linking the magnetic change detection unit 71B.

  The magnetic force lines 77 </ b> A and 77 </ b> B are magnetic force lines coming from the outside of the magnetic detection unit 70. For example, the magnetic field lines 77A and 77B are electromagnetic noise generated by an actuator disposed outside the magnetic detection unit 70, magnetic noise generated by metal parts such as a bearing provided in the drive unit, ATM, and cash processing machine. Magnetic field lines such as magnetic noise generated by a magnetic health device worn by an operator operating with an automatic transaction apparatus such as the above.

  Most of the magnetic force lines 77B coming from the outside are drawn into the upper magnetic shield 73a, which is a magnetic body, exits from the upper magnetic shield end portion 73B, and is drawn into the adjacent lower magnetic shield end portion 74B, thereby lowering the lower magnetic shield. Exit from 74a. Similarly, the magnetic field lines 77A coming from the outside are drawn into the lower magnetic shield 74a, which is a magnetic body, exit from the lower magnetic shield end portion 74A, are drawn into the adjacent upper magnetic shield end portion 73A, and the upper magnetic shield 73a. Go out from. For this reason, most of the magnetic lines of force 77A and 77B coming from the outside pass through the upper magnetic shield 73a and the lower magnetic shield 74a, and thus do not link the magnetic change detection unit 71B. That is, the upper magnetic shield 73a and the lower magnetic shield 74a shield the magnetic flux interlinking the transport surface of the transport path.

  The magnetic field lines 71Cb1 of the bias magnet pass through the cross section of the shaft 72A of the magnetic gap roller 72. However, since the shaft 72A is formed of a nonmagnetic metal material such as austenitic stainless steel, there is no change in the magnetic field lines 71Cb1. . Although the lower side of the bias magnet 71C is an N pole and the upper side is an S pole, when the upper side is an N pole and the lower side is an S pole, the direction of the lines of magnetic force is only reversed. The same applies to the case where the directions of the magnetic lines 77A and 77B coming from the outside are reversed.

  As described above, the upper magnetic shield end portions 73A and 73B and the lower magnetic shield end portions 74A and 74B are inserted into the recesses of the upper conveyance guide 41 and the lower conveyance guide 42, and are close to each other across the conveyance path. ing. That is, the interval (distance) between the upper magnetic shield end portions 73A and 73B and the lower magnetic shield end portions 74A and 74B is longer than the interval between the lower surface of the upper conveyance guide 41 and the upper surface of the lower conveyance guide 42. Further, the distance between the upper magnetic shield end portions 73A and 73B and the lower magnetic shield end portions 74A and 74B is the distance d2 between the front end surface of the magnetic sensor 71 and the inner surface of the upper magnetic shield end portion 73A, and the magnetic sensor. 71 is narrower than the shorter one of the distance d1 between the rear end face of 71 and the inner face of the upper magnetic shield end 73B. Further, the distance between the upper magnetic shield end portions 73A and 73B and the lower magnetic shield end portions 74A and 74B is 1/2, 1/3, or 1/5 or less of the shorter one of the intervals d1 and d2. Is preferred.

FIG. 9 is an explanatory diagram for explaining the magnetic field distribution when the paper sheet passes through the magnetic information acquisition unit. That is, the bill BL as a paper sheet is conveyed to the inside of the upper magnetic shield 73a and the lower magnetic shield 74a and is passing through the magnetic sensor 71.
When the banknote BL passes in the vicinity of the magnetic change detector 71B, the shape of the lines of magnetic force changes due to the influence of the magnetic paint applied to the banknote BL. Thereby, the magnetic change detection part 71B detects the change of direction and density of the magnetic force lines 71Ca1 and 71Cb1 which are linked. For this reason, the magnetic change detection part 71B can detect that the magnetic body is contained in the banknote BL.

  According to the paper sheet discrimination device 18a of the first embodiment, the electromagnetic noise generated by the actuator provided outside the magnetic detection unit 70 when detecting the magnetic paint of the banknote BL is provided in the drive unit. Most of magnetic field lines 77A and 77B coming from the outside such as magnetic noise generated by the operation of the metal parts and magnetic force of an operator such as an ATM or cash processor are attached to the upper magnetic shield 73 and the lower part. It passes through the side magnetic shield 74. For this reason, the magnetic change detection unit 71B does not detect the magnetic lines of force 77A and 77B. The magnetic field lines 71Cb1 of the bias magnet 71C pass through the shaft 72A of the magnetic gap roller 72, but the magnetic field lines 71Cb1 do not change because the shaft 72A is formed of a nonmagnetic metal material. Therefore, the paper sheet discrimination device 18a reduces the influence other than the lines of magnetic force caused by the magnetic paint applied to the bill BL by the upper magnetic shield 73 and the lower magnetic shield 74, and improves the S / N ratio compared to the conventional configuration. can do.

(Automatic cash transaction equipment)
FIG. 10 is an external view of the automatic transaction apparatus according to the first embodiment of the present invention.
In the automatic transaction apparatus 1, a bill deposit / withdrawal unit 16 disposed at a lower portion and a control device 9 disposed adjacent to the bill deposit / withdrawal unit 16 are disposed inside the main body casing 2. A customer service section 3 is provided on the front side of the body 2. The customer service section 3 includes an operation display section 6, a transaction slip slot 8, a card slot 4, a deposit / withdrawal slot 5, and a numeric keypad 7.

  The operation display unit 6 is a touch panel type LCD (Liquid Crystal Display), and functions as an input unit for displaying a transaction screen necessary for a transaction and inputting a transaction type, a password, a transaction amount, and the like. The card entry / exit 4 is an insertion slot into which a financial card such as a magnetic card or an IC card is inserted, and a card handling unit is incorporated therein. The deposit / withdrawal port 5 is a mechanism unit that inserts / dispenses bills BL and coins. The numeric keypad 7 is an input device for inputting a password or the like. The transaction slip port 8 has a built-in printing device for printing the transaction slip.

  The control device 9 develops an OS (Operations System) and a transaction program stored in a nonvolatile storage unit such as an HDD (Hard Disk Drive) in a RAM (Random Access Memory), and is executed by the CPU, whereby each unit is executed. Control.

(Bill deposit / withdrawal department)
FIG. 11 is a configuration diagram of a banknote deposit and withdrawal unit according to the first embodiment of the present invention.
The banknote depositing / withdrawing unit 16 includes the paper sheet discrimination device 18, the temporary storage unit 20, the transport unit 24, the three banknote storages 26 (26 a, 26 b, 26 c), the rejection store 28, the forgetting collection unit 22, And a customer service section 3.

  The bill deposit / withdrawal unit 16 separates the bills BL (FIG. 1) put into the customer service unit 3 one by one, discriminates the separated bills BL with the paper sheet discrimination device 18, and temporarily identifies the identified bills BL. The holding unit 20 holds the transfer, and the transfer unit 24 transfers the bill to the bill storage 26 or the reject storage 28 at the end of the transaction. Each part conveys rectangular banknote BL in a transversal direction along a conveyance path by a roller, a belt, or the like (not shown). The conveyance path connects the front side of the paper sheet discrimination device 18 to the banknote deposit / withdrawal unit 16, the banknote storage 26 and the reject storage 28.

  The temporary holding unit 20 temporarily holds the banknote BL inserted by the customer into the banknote depositing / withdrawing unit 16 at the time of depositing, and temporarily waits until the normal banknote discriminated as depositable by the paper sheet discrimination device 18 is confirmed. On the other hand, the reject banknote BL identified as being non-payable is discharged to the banknote deposit / withdrawal part 16 by so-called last-in first-out. The reject box 28 stores banknotes BL that have been identified as damaged or soiled banknotes (so-called damaged banknotes) in the paper sheet discrimination device 18, and banknotes BL of denominations such as 5,000 or 2,000 yen tickets. To do. The banknote storage 26 is configured to take in and store the banknotes BL that have been transported from the transport section 24 by the storage and discharge mechanism, and discharge the stored banknotes BL and supply them to the transport section 24. . The forgotten collection warehouse 22 collects and stores banknotes BL that the customer forgot to collect from the banknote depositing / withdrawing unit 16 during the transaction.

(Comparative example)
FIG. 12 is a configuration diagram of a paper sheet discrimination apparatus that is a comparative example of the present invention.
The paper sheet discrimination device 18b does not include the upper magnetic shield 73a and the lower magnetic shield 74a, and the magnetic gap roller 72a is changed to the magnetic gap roller 72b, as compared with the paper sheet discrimination device 18a of FIG. Is different.

  Since the paper sheet discrimination device 18b is not provided with the upper magnetic shield 73a and the lower magnetic shield 74a, electromagnetic noise comes from the actuator to the magnetic sensor 71, and the magnetic force of the health magnetic article worn by the operator is magnetic noise. To the magnetic sensor 71. Since the upper frame 40Aa and the lower frame 40Ba are formed of resin, even if the inner surface is electromagnetically shielded by aluminum vapor deposition or aluminum plating, there is no magnetic shielding effect.

FIG. 13 is a structural diagram of a magnetic gap roller which is a comparative example of the present invention.
The magnetic gap roller 72b includes a shaft 72Ab as a shaft portion and a plurality of rollers 72Bb inserted into the shaft 72Ab. The shaft 72Ab is formed of a nonmagnetic metal material such as austenitic stainless steel, and a plurality of groove shapes 72AB are formed at equal angles on the outer diameter portion thereof. The roller 72Bb is a cylindrical rubber-based elastic member, and differs from the roller 72Ba (FIG. 6) of the above-described embodiment in that a plurality of groove shapes 72BB are not formed. The shaft 72Ab is fixed to the plurality of rollers 72Bb by an adhesive filled in the formed groove shape 72AB. The shaft 72Ab is different from the shaft 72Aa (FIG. 6) of the above embodiment in that the austenitic stainless steel undergoes processing-induced martensitic transformation due to the groove processing, and the surface may change to a magnetic material.

FIG. 14 is a time change diagram of the output value of the magnetic change detector.
14A to 14E show magnetic change detection when the upper magnetic shield 73a and the lower magnetic shield 74a are not used and the magnetic gap roller 72b of the comparative example is used (FIG. 13). FIG. 14F to FIG. 14J show the detection results of the portion 71B (FIGS. 8 and 9). The upper magnetic shield 73a and the lower magnetic shield 74a are used in FIGS. The detection result of the magnetic change detection part 71B when the roller 72a (FIG. 6) is used is shown.

  FIGS. 14 (a) and 14 (f) show changes over time in the magnetic field strength caused by the magnetic paint when the bill BL passes, and FIGS. 14 (b) and 14 (g) show the influence of electromagnetic noise from the outside such as an actuator. 14 (c) and 14 (h) show the change in magnetic field strength when the magnetic field strength is received, and FIGS. 14 (c) and 14 (h) show the magnetic field strength when affected by the external magnetic field lines caused by the movement (movement) of the magnetic health appliance or the like. FIG. 14D shows the change over time, FIG. 14D shows the influence of magnetic noise when the comparative example magnetic gap roller 72b (FIG. 13) is used, and FIG. 14I shows the magnetic gap roller 72a ( The influence when using FIG. 6) is shown by time change. FIG. 14 (e) shows the characteristics obtained by superimposing FIGS. 14 (a) to 11 (d), and FIG. 14 (j) shows the characteristics obtained by superimposing FIGS. 14 (f) to 14 (i). Show.

  While the bills BL pass through the magnetic change detector 71B, the magnetic material applied to the bills BL changes the magnetic field distribution, and the magnetic change detector 71B outputs the change. When the passage of the banknote BL is completed, the magnetic field returns to the original distribution, and the magnetic change detection unit 71B outputs the value before the passage (FIG. 14 (a)). Since an actuator such as a motor generates electromagnetic noise having a relatively high frequency component, the magnetic change detection unit 71B outputs a fluctuation component corresponding to the frequency component (FIG. 14B). Since the magnetic health device worn on the wrist of the operator is slower than the actuator, the magnetic change detection unit 71B outputs with a time fluctuation slower than the conveyance of the bill BL (FIG. 14C). ). The magnetic gap roller 72b (FIG. 13) of the comparative example may undergo processing-induced martensite transformation by the groove processing of the shaft 72Ab, and the surface may be changed to a magnetic material. For this reason, the magnetic change detection unit 71B fluctuates in output with a fluctuation period corresponding to the groove interval and the rotation speed of the magnetic gap roller 72b (FIG. 14D).

  On the other hand, when the upper magnetic shield 73a and the lower magnetic shield 74a are used and the magnetic gap roller 72a (FIG. 6) is used, when the bill BL passes the magnetic change detector 71B, the magnetic change detector 71B outputs the same change value as FIG. 14A (FIG. 14F). The electromagnetic noise from the actuator is shielded by the upper magnetic shield 73a and the lower magnetic shield 74a, and the magnetic change detector 71B outputs a constant value (FIG. 14 (g)). Since the actuator has a relatively high frequency component, the upper magnetic shield 73a and the lower magnetic shield 74a also function as electromagnetic shields.

  The magnetic health device worn by the operator has a slow moving speed, but the upper magnetic shield 73a and the lower magnetic shield 74a made of iron also shield the static magnetic field, so the magnetic change detection unit 71B has a constant value. Is output (FIG. 14 (h)). Since the magnetic gap roller 72a (FIG. 6) is not subjected to metal processing for providing a groove on an austenitic stainless steel shaft, a non-magnetic material is maintained. For this reason, the magnetic change detector 71B outputs a constant value (FIG. 14 (i)).

  Therefore, the magnetic change detection unit 71B outputs the characteristics obtained by superimposing FIGS. 14 (f) to 14 (i), that is, the characteristics shown in FIG. 14 (f) (FIG. 14 (j)). On the other hand, when the magnetic gap roller 72b (FIG. 13) of the comparative example is used without using the upper magnetic shield and the lower magnetic shield, the magnetic change detection unit 71B is affected by a plurality of magnetic noises. The received value is output (FIG. 14E).

In the paper sheet discrimination device 18b (FIG. 12) of the comparative example, the upper frame 40Aa and the lower frame 40Ba are formed of resin. Even if the resin is subjected to electromagnetic shielding such as aluminum vapor deposition or plating, the resin passes the magnetic flux from the outside. For this reason, the operation of the metal parts provided in the drive part of the banknote depositing / withdrawing part 16 (FIG. 11), the magnetic health apparatus etc. which the operator of the automatic transaction apparatus 1 (FIG. 10) wears become a magnetic noise source. There was a problem that the S / N ratio deteriorated. In addition, since the upper conveyance guide 41 and the lower conveyance guide 42 are made of resin, the rigidity is low, and there is a problem that the influence of noise due to vibration is large and the S / N ratio is deteriorated.

  On the other hand, the paper sheet discrimination device 18a (FIG. 1) of the present embodiment has an upper magnetic shield 73a and a lower magnetic shield formed of magnetic metal (iron) so as to surround the magnetic sensor 71. 74a is provided, the shaft 72Aa of the magnetic gap roller 72a is made of a nonmagnetic metal, and a groove shape 72BB is provided on the inner diameter of the roller 72Ba in order to join the roller 72B and the shaft 72Aa.

  Thereby, the paper sheet discrimination device 18a (FIG. 1) can pass the magnetic flux from the outside through the upper magnetic shield 73a and the lower magnetic shield 74a, and can reduce the influence of magnetic noise. Further, by not forming the groove in the shaft 72Aa, the non-magnetism of the austenitic stainless steel is maintained, and the magnetic noise due to the rotation of the magnetic gap roller 72a can be reduced. Further, since the groove is not formed in the shaft 72Aa, the warpage is reduced. For this reason, the paper sheet discrimination device 18 a can reduce the gap between the magnetic gap roller 72 a and the lower surface of the upper conveyance guide 41. Note that the thin portion 41 </ b> A is integrally formed when the upper conveyance guide 41 is formed. For this reason, since the lower surface of the upper conveyance guide 41 is flat and does not have a level | step difference, the banknote BL can be conveyed smoothly.

  Further, the upper conveyance guide 41 of the upper frame 40Aa and the lower conveyance guide 42 of the lower frame 40Ba are fastened to the upper magnetic shield 73a and the lower magnetic shield 74a or fixed with an adhesive. The rigidity becomes high and the influence of noise due to vibration can be reduced. As a result, the paper sheet discrimination device 18a (FIG. 1) can reduce the influence of noise, improve the S / N ratio, and improve the performance of discriminating the degree of authenticity of banknotes.

(Second Embodiment)
The upper magnetic shield 73a and the lower magnetic shield 74a of the first embodiment are formed in a U-shape by bending two sides of a rectangular iron plate, but the four sides of the rectangular iron plate are It can also be bent to form a box shape.

FIG. 15 is a configuration diagram of a paper sheet discrimination apparatus according to the second embodiment of the present invention.
The paper sheet discrimination device 18c is different from the paper sheet discrimination device 18a (FIG. 1) of the first embodiment in place of the upper magnetic shield 73a and the lower magnetic shield 74a. The difference is that a side magnetic shield 74b is provided.

  That is, the upper magnetic shield 73b and the lower magnetic shield 74b are arranged on the outer side of the banknote BL, the upper magnetic shield left end 73C, the upper magnetic shield right end 73D, the lower magnetic shield left end 74C, A side magnetic shield right end 74D is provided. The upper magnetic shield left end 73C and the lower magnetic shield left end 74C are brought into contact with each other, and the upper magnetic shield right end 73D and the lower magnetic shield right end 74D are brought into contact with each other. By this contact, the magnetic detection unit 70 can further reduce the lines of magnetic force coming from the left-right direction. Further, although the upper magnetic shield 73 and the lower magnetic shield 74 are configured separately, they may be integrated as long as the apparatus is not opened and closed. In this case, a higher reduction effect can be obtained than the upper magnetic shield 73a and the lower magnetic shield 74a of the first embodiment.

(Third embodiment)
FIG. 16 is a configuration diagram of a paper sheet discrimination apparatus according to the third embodiment of the present invention.
The paper sheet discrimination device 18 of the first embodiment is configured such that the upper magnetic shield 73 and the lower magnetic shield 74 are included in the magnetic detection unit 70. On the other hand, the paper sheet discrimination device 18d of this embodiment enlarges the upper magnetic shield 73 and the lower magnetic shield 74, and uses the upper magnetic shield frame 40Ab and the lower magnetic shield 74A as a part of the upper frame 40A and the lower frame 40B. As the side magnetic shield frame 40Bb, the end portions 40AbA and 40AbB of the upper magnetic shield frame 40Ab and the end portions 40BbA and 40BbB of the lower magnetic shield frame 40Bb are arranged close to each other. This can also shield the magnetic lines of force from the magnetic health device attached to the operator's wrist or the like.

(Modification)
The present invention is not limited to the embodiments described above, and various modifications such as the following are possible.
(1) Although the upper magnetic shield 73 and the lower magnetic shield 74 of each of the above embodiments are formed with an iron plate in a U-shape in cross section (substantially U-shaped), the magnetic sensor 71 and the magnetic gap roller 72 are not provided. It may be an iron ingot. The magnetic shielding effect is improved by using an iron lump.

(2) The upper conveyance guide 41 and the upper magnetic shield 73 of the above embodiment are fixed using either one or both of the screw 77 and the adhesive, but the concave portion 41C formed on the upper conveyance guide 41 and the upper side The magnetic shield 73 may be fitted. Similarly, the concave portion of the lower conveyance guide 42 and the lower magnetic shield 74 may be fitted. In addition, at this time, it is preferable that the upper conveyance guide 41 and the lower conveyance guide 42 have a fitting portion that is higher than the other portions and has a long fitting length.

DESCRIPTION OF SYMBOLS 1 Automatic transaction apparatus 2 Main body case 3 Customer service part 4 Card entrance / exit 5 Deposit / withdrawal port 6 Operation display part 7 Numeric keypad 8 Transaction slip port 9 Control apparatus 10 Banknote depositing / withdrawing machine 12 Control part 16 Banknote deposit / withdrawal part 18, 18a, 18b , 18c, 18d Paper sheet discrimination device 20 Temporary holding unit 22 Forgetting collection box 24 Transport unit 26 Banknote storage box 28 Reject box 31 Open spindle 31A Spindle mounting plate 32 Upper opening / closing fitting part 33 Lower opening / closing fitting part 38a, 38b, 38c Driving roller (conveying means)
39a, 39b, 39c Followed roller (conveying means)
40, 40a Frame 40b Magnetic shield frame 40A, 40Aa Upper frame 40Ab Upper magnetic shield frame 40AC, 40AD Upper magnetic shield frame end 40B, 40Ba Lower frame 40Bb Lower magnetic shield frame 40BC, 40BD Lower magnetic shield frame end 41 Upper transport guide (first transport guide)
41A Thin part 41B Locking part 41C, 42C Concave part 41D Screw mounting part 42 Lower conveyance guide (second conveyance guide)
43 Transport surface 50 Thickness information acquisition unit 51 Thickness reference roller 52 Thickness detection roller 52A Roller unit 52B Rotating shaft body 52C Support shaft 52D Thickness detection roller bracket 60 Optical information acquisition unit 61 Upper reflection / transmission module 62 Lower reflection module 70 Magnetic detection unit 71 Magnetic sensor (magnetic information acquisition unit)
71A Conveying surface 71B Magnetic change detection part 71C Bias magnet 71Ca1, 71Ca2, 71Cb1, 71Cb2 Magnetic field lines 72, 72a, 72b Magnetic gap rollers 72A, 72Aa, 72Ab Shaft (shaft part)
72B, 72Ba, 72Bb Roller 72AB, 72BB Groove shape 73, 73a, 73b Upper magnetic shield (first magnetic shielding means, plate-like magnetic metal)
73A, 73B Upper magnetic shield end portion 73C Upper magnetic shield left end portion 73D Upper magnetic shield right end portion 73E, 74E Mounting portion 73Ea Hole 74, 74a, 74b Lower magnetic shield (second magnetic shielding means, plate-like magnetic metal )
74A, 74B Lower magnetic shield end portion 74C Lower magnetic shield left end portion 74D Lower magnetic shield right end portion 75 Biasing member 76 Bearing (ball bearing)
77 Screw (fastening member)
77A, 77B Magnetic field lines BL Banknote (medium)

Claims (10)

A first transport guide that forms a transport path through which paper sheets are transported;
A second conveyance guide which is disposed opposite the first conveyance guide across the conveyance path and forms the conveyance path;
Conveying means for conveying the paper sheets on the conveying path;
A magnetic information acquisition unit for acquiring magnetic information of the paper sheets conveyed by the conveying means;
A first magnetic shielding means that surrounds at least the magnetic information acquisition unit and has an end provided on the first transport guide;
Paper sheets comprising: an end portion provided on the second conveyance guide, and the end portion including second magnetic shielding means adjacent to the end portion of the first magnetic shielding means Identification device. The paper sheet discrimination apparatus according to claim 1,
The first transport guide has a recess for inserting an end of the first magnetic shielding means,
The second transport guide has a recess for inserting the end of the second magnetic shielding means,
Each said edge part and the said recessed part are mutually adhering, The paper sheet discrimination apparatus characterized by the above-mentioned. The paper sheet discrimination apparatus according to claim 1,
An end of the first magnetic shielding means is fastened to the first conveyance guide,
An end part of the second magnetic shielding means is fastened to the second transport guide, and is a paper sheet discrimination device. The paper sheet discrimination apparatus according to claim 1,
The first transport guide is formed with a recess that fits with an end of the first magnetic shielding means,
The paper sheet discrimination device, wherein the second transport guide is formed with a recess that fits with an end of the second magnetic shielding means. The paper sheet discrimination apparatus according to claim 1,
The first magnetic shielding means and the second magnetic shielding means are made of a plate-like magnetic metal,
The plate-like magnetic metal of the first magnetic shielding means has two sides perpendicular to the conveyance direction provided in the first conveyance guide,
The sheet magnetic discriminating apparatus according to claim 2, wherein the plate-like magnetic metal of the second magnetic shielding means has two sides perpendicular to the conveying direction provided in the second conveying guide. The paper sheet discrimination apparatus according to claim 5,
The sheet identification device, wherein the magnetic information acquisition unit is surrounded by the first magnetic shielding means on a side opposite to the first conveyance guide with respect to the conveyance path. A paper sheet discrimination device according to any one of claims 1 to 6,
The paper sheet discrimination apparatus, wherein the first magnetic shielding means and the second magnetic shielding means are in contact with each other on both sides of the transport path in the paper transport direction. A paper sheet discrimination apparatus according to any one of claims 1 to 7,
The magnetic information acquisition unit
A magnetic sensor for acquiring magnetic information of the paper sheet;
A roller for bringing the paper sheets close to the magnetic sensor;
A shaft for rotatably holding the roller,
The roller has a plurality of recesses formed on the inner peripheral surface,
The sheet discriminating apparatus, wherein the shaft and the roller are fixed with an adhesive filled in the plurality of recesses. It is a paper sheet discrimination device according to any one of claims 1 to 8,
In the first conveyance guide, a sheet on which the magnetic information acquisition unit is disposed is integrally formed as a thin part thinner in the thickness direction than the periphery of the sheet. Classification device.   An automatic transaction apparatus comprising the paper sheet discrimination apparatus according to any one of claims 1 to 9.

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