JP5472523B2 - Medium discrimination device and medium transaction device - Google Patents

Description

  The present invention relates to a medium discrimination device and a medium transaction device, and is suitable for application to, for example, an automatic teller machine (ATM) that performs a desired transaction by inserting a medium such as banknotes.

  2. Description of the Related Art Conventionally, in an automatic teller machine used in a financial institution or the like, for example, a customer deposits cash such as banknotes or coins according to transaction details with a customer, and also withdraws cash to a customer. ing.

  As an automated teller machine, for example, a banknote deposit / withdrawal port for receiving and receiving banknotes with customers, a discrimination unit for discriminating the denomination and authenticity of inserted banknotes, and temporarily holding inserted banknotes The thing which has the temporary storage part to perform and the denomination cassette which stores a banknote for every denomination is proposed.

  This automatic teller machine, in a deposit transaction, when a customer inserts a banknote into a banknote deposit / withdrawal port, the inserted banknote is discriminated by a discrimination unit, and a banknote discriminated from a normal banknote is held in a temporary holding unit, The banknotes identified as not to be traded are returned to the banknote deposit / withdrawal port and returned to the customer. Subsequently, when the deposit amount is confirmed by the customer, the automatic teller machine re-discriminates the denomination of the banknote held in the temporary holding unit by the discriminating unit, and stores it in the cassette according to the discriminated denomination.

  Incidentally, some banknotes are printed with magnetic ink at predetermined locations. Then, what was made to discriminate | determine the kind, authenticity, etc. of a banknote by detecting magnetism from this magnetic ink using a magnetic sensor as a discrimination part is proposed (for example, refer patent document 1).

JP 2010-198337 A (FIG. 2)

  By the way, in the discrimination part in the automatic teller machine 1 having such a configuration, a guide roller or the like is disposed in the vicinity of the magnetic sensor so as to convey the bill so as to contact the magnetic sensor. For this guide roller, a bearing made of a metal material, particularly a ball bearing made of a magnetic material is often used from the viewpoint of durability, cost, and the like.

  However, a bearing made of a magnetic material may become magnetized, for example, during assembly work or maintenance work of the discrimination part.

  In this case, the bearing changes the surrounding magnetic field with the rotation of the guide roller. Thereby, the magnetic sensor has detected the magnetic field which changes as noise, and there existed a problem that the precision which detects the magnetism of a banknote will fall.

  The present invention has been made in consideration of the above points, and an object of the present invention is to propose a medium discriminating apparatus and a medium transaction apparatus that can improve the detection accuracy of magnetism from a medium.

  In order to solve such a problem, in the medium discrimination device of the present invention, the medium discrimination device including a discrimination control unit for discriminating a medium based on the magnetic detection result by the magnetic head is disposed in the vicinity of the magnetic head. A roller that contacts and rotates so as to convey the medium while contacting the medium with the head, a rotating shaft of the roller, a bearing that supports the rotating shaft, and a relay unit that separates the distance between the magnetic head and the bearing are provided. I did it.

  In the medium discrimination device of the present invention, since the relay unit is provided, the distance between the magnetic head and the bearing can be separated. Therefore, when the magnetic material is used for the bearing, the influence of the magnetic field change and vibration Influence etc. can be suppressed small.

  Moreover, in the medium transaction apparatus of this invention, in the medium discrimination apparatus provided with the discrimination control part which discriminates a medium based on the magnetic detection result by a magnetic head, the reception part which receives the transaction regarding a medium, and the medium which was received by the reception part , A roller disposed near the magnetic head, rotating in contact with the medium so as to convey the medium while contacting the magnetic head, a rotating shaft of the roller, and a bearing supporting the rotating shaft And a relay part for separating the distance between the magnetic head and the bearing.

  In the medium transaction apparatus of the present invention, since the relay unit is provided, the distance between the magnetic head and the bearing can be separated, so that the influence of the magnetic field change or vibration when the magnetic body is used for the bearing. Influence etc. can be suppressed small.

  According to the present invention, by providing the relay portion, the distance between the magnetic head and the bearing can be separated. Thus, the present invention can realize a medium discrimination device and a medium transaction device that can improve the detection accuracy of magnetism from a medium.

It is a rough-line perspective view which shows the external appearance structure of an automatic teller machine. It is a basic diagram which shows the internal structure of an automatic teller machine. It is a basic diagram which shows the structure (1) of a discrimination part. It is a basic diagram which shows the structure (2) of a discrimination part. It is a basic diagram which shows the structure of the tension roller by 1st Embodiment. It is a basic diagram which shows the structure of the magnetic detection part by 1st Embodiment. It is a basic diagram which shows the structure of the tension roller by 2nd Embodiment. It is a basic diagram which shows the structure of the tension roller by 4th Embodiment. It is a basic diagram which shows the structure of the magnetic detection part by 5th Embodiment. It is a basic diagram which shows the structure of the magnetic detection part by 6th Embodiment. It is a basic diagram which shows the structure of the magnetic detection part by other embodiment.

  Hereinafter, modes for carrying out the invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

[1. First Embodiment]
[1-1. Overall configuration of automatic teller machine]
As shown in FIG. 1, an automatic teller machine 1 is configured with a box-shaped housing 2 as the center, and is configured to perform transactions relating to cash with customers.

  The housing 2 is provided with a customer service portion 3 at a location where it is easy to insert a bill or operate with a touch panel while the customer faces the front surface 2A side, that is, a location extending from the top of the front surface 2A to the upper surface.

  The customer service section 3 directly exchanges cash, bankbooks, etc. with the customer, and receives notification of information related to transactions and operation instructions. The coin deposit / withdrawal port 4, the banknote deposit / withdrawal port 5, A passbook insertion slot 6, a card insertion slot 7, and a display operation unit 8 are provided.

  The coin deposit / withdrawal port 4 and the banknote deposit / withdrawal port 5 are portions where coins and bills BL to be deposited by customers are respectively inserted and coins and bills BL to be dispensed to customers are respectively discharged. Moreover, the coin deposit / withdrawal port 4 and the banknote deposit / withdrawal port 5 are opened or closed by driving shutters provided respectively. Incidentally, banknote BL is comprised, for example with the rectangular paper.

  The passbook insertion port 6 is a portion where a passbook used in the transaction is inserted and the passbook is discharged when the transaction ends. A passbook processing section (not shown) for recording transaction contents and the like in a passbook is provided at the back of the passbook insertion slot 6.

  The card insertion slot 7 is a portion into which various cards such as cash cards are inserted or ejected. A card processing section (not shown) for reading account numbers and the like magnetically recorded on various cards is provided at the back of the card insertion slot 7.

  The display operation unit 8 is integrated with an LCD (Liquid Crystal Display) that displays an operation screen at the time of transaction, and a touch panel for selecting a transaction type, inputting a personal identification number, transaction amount, and the like.

  Incidentally, the housing | casing 2 is comprised by the door which can open and close one part side surfaces, such as the front 2A side and its opposite side (namely, back side). That is, the housing | casing 2 protects the banknote BL, the coin, etc. which are hold | maintained by obstruct | occluding each door at the time of the transaction operation | movement which performs the transaction regarding cash with a customer. On the other hand, at the time of maintenance work in which an operator or the like performs maintenance work, the housing 2 can easily perform work on each internal part by opening each door as necessary.

  In the following, the front side that is the front face 2A side of the automatic teller machine 1 and the rear side opposite to the front side, the left side and the right side that are left and right as viewed from the customer facing the front face 2A side, and the upper side and the lower side are defined. I will explain.

  FIG. 2 is a side view of the automatic teller machine 1 shown in FIG. 1 as viewed from the direction of the arrow A, and mainly shows a part related to the processing of the banknote BL in the internal configuration of the automatic teller machine 1. As shown in the figure, inside the automatic teller machine 1, the customer service unit 3, the discrimination unit 13 for determining the denomination and authenticity of the bill BL, and the deposited bill BL are temporarily held on the upper side. A temporary storage unit 14 or the like is provided, and a bill storage unit 15 or the like that stores the bills BL in denominations is provided on the lower side.

  Further, inside the automatic teller machine 1, a transport unit 12 that transports the bills BL between the respective units along a transport path indicated by a thick line in the figure is provided. The conveyance part 12 is comprised with the motor, gear, pulley, belt, etc. which are not shown in figure, and is made to convey the short side direction of the banknote BL as an advancing direction.

  Incidentally, in the automatic teller machine 1, components that generate magnetic noise such as a motor for transporting the bill BL in the transport unit 12, a solenoid for switching the transport path, or various cooling fans (not shown). Most of them are arranged above the center of the discrimination part 13 in the vertical direction.

  The automatic teller machine 1 is configured to control the whole by the control unit 10. For example, when the customer performs a deposit transaction for depositing the bill BL, the control unit 10 receives a predetermined operation input via the display operation unit 8 (FIG. 1), and then opens the shutter of the bill deposit / withdrawal port 5 to open the bill. Insert BL.

  Subsequently, the control unit 10 conveys the inserted banknote BL to the discrimination unit 13 via the transport unit 12 for discrimination, and transports the banknote BL identified as a normal banknote to the temporary storage unit 14 to temporarily hold it. On the other hand, the bill BL identified as not to be traded is conveyed to the bill deposit / withdrawal port 5 and returned to the customer.

  After that, after the control unit 10 confirms the deposit amount to the customer via the display operation unit 8, transports the banknote BL held in the temporary holding unit 14 to the discrimination unit 13 again, and re-discrimination of the denomination, Furthermore, it conveys to the banknote storage part 15. FIG.

  The banknote storage part 15 conveys the banknote BL identified as not damaged by the discrimination part 13 to each banknote storage 16 corresponding to the denomination and stores it so as to be stacked in the thickness direction. Moreover, the banknote storage part 15 conveys the banknote BL identified as having been damaged by the discrimination part 13 to the rejection store | warehouse | chamber 17, and stores it so that it may accumulate and accumulate in the thickness direction.

  Thus, the automatic teller machine 1 performs the discrimination process of the banknote BL by the discrimination unit 13 in the deposit process or the withdrawal process of the banknote BL, determines the transport destination according to the result, and determines the transport destination by the transport unit 12. The bills BL are transported to this transport destination.

[1-2. Configuration of the identification section]
As shown in the left side view of FIG. 3, the discrimination unit 13 forms a conveyance path 24 between the upper unit 22 on the upper side and the lower unit 23 on the lower side in the rectangular parallelepiped casing 21. The bill BL is identified based on the control of the control unit 20 while the bill BL is traveling forward or backward along the transport path 24.

  The discrimination unit 13 includes modules such as a first transport unit 25, a magnetic detection unit 26, a second transport unit 27, an optical detection unit 28, and a thickness detection unit 29, so that the inside of the housing 21 is directed from the rear side to the front side. Are arranged sequentially.

  In FIG. 3, for convenience of explanation, the left side plate of the housing 21 is omitted, and the internal components are schematically shown.

  In the discrimination unit 13, the modules are close to each other in the front-rear direction due to restrictions on the installation location in the automatic teller machine 1, restrictions for reliably delivering the bills BL conveyed along the short side direction, and the like. Has been placed.

[1-2-1. Configuration of first transport unit]
The first transport unit 25 includes a transport roller 31 disposed below the transport path 24, and a shaft 32 and a tension roller 33 disposed above the transport path 24.

  The conveyance roller 31 has a configuration in which a plurality of annular rubber rollers 31B are penetrated by a shaft 31A that is formed in a cylindrical shape that is elongated to the left and right.

  The shaft 31A is made of a nonmagnetic stainless material, and a driving force is transmitted through a driving motor (not shown) or a driving gear meshed with the driving motor, so that the rotation axis along the left and right is the center. It can be rotated in both directions. For this reason, in the conveyance roller 31, the shaft 31A and the rubber roller 31B rotate together.

  Similarly to the shaft 31A, the shaft 32 is formed in a cylindrical shape that is elongated to the left and right, is held so as to be swingable in the vertical direction with respect to the housing 21, and is biased downward by a spring (not shown). Incidentally, unlike the shaft 31A, the shaft 32 is configured not to rotate.

  The tension roller 33 is formed in an annular shape as a whole, and the shaft 32 passes through the center thereof. As shown in the plan view of FIG. 4, the shaft 32 is provided with five tension rollers 33 so as to be separated from each other by a predetermined interval in the left-right direction. Incidentally, the rubber roller 31 </ b> B of the transport roller 31 is provided at a location facing the tension roller 33.

  As shown in the enlarged side view of FIG. 5, the tension roller 33 is formed by combining an inner ring 33A, a ball 33B and an outer ring 33C, and is configured in the same manner as a so-called ball bearing. The inner ring 33A, the ball 33B, and the outer ring 33C are all made of a magnetic metal material. Further, the inner ring 33 </ b> A is fixed to the shaft 32.

  Like the general ball bearing, the tension roller 33 has a very low rolling resistance of the ball 33B, and thus can smoothly rotate the outer ring 33C with respect to the shaft 32 and the inner ring 33A.

  With this configuration, the first transport unit 25 presses the tension roller 33 against the transport roller 31, and when there is a bill BL in the transport path 24 between them, the transport roller while smoothly rotating the outer ring 33 </ b> C of the tension roller 33. The rotational driving force of 31 can be transmitted to this bill BL.

  Thereby, the 1st conveyance part 25 can convey banknote BL to the front direction or back direction along the conveyance path 24. FIG.

[1-2-2. Configuration of magnetic detection unit]
The magnetic detection unit 26 (FIG. 3) includes a magnetic sensor 34 disposed on the upper side of the transport path 24, and a pressing unit 35 and a guide roller 36 disposed on the lower side of the transport path 24.

  As shown in FIGS. 3 and 4, the magnetic sensor 34 is configured in a rectangular parallelepiped shape that is long in the left-right direction, and a magnetic head 34 </ b> A is provided on the lower surface thereof. Incidentally, in the magnetic sensor 34, magnetic heads 34A are arranged at a plurality of positions in the left-right direction.

  The magnetic sensor 34 detects the magnetism of the bill BL conveyed through the conveyance path 24 by the magnetic head 34 </ b> A and sends the detection result to the control unit 20.

  As shown in the front view of FIG. 6, the pressing portion 35 is provided at each of the left and right end portions below the magnetic sensor 34. The pressing portion 35 is formed in a thin rectangular parallelepiped shape from the left and right by a predetermined resin material.

  The pressing portion 35 is supported by a frame (not shown) so as to be movable in the vertical direction, and a spring 35B is provided on the lower surface. The lower end of the spring 35B is fixed to the housing 21 and is compressed from the natural state, and the pressing portion 35 is urged upward by its restoring force. As a result, the pressing portion 35 presses the upper surface against the lower surface of the magnetic sensor 34.

  A round hole bearing 35A penetrating in the left-right direction is formed at a location that is substantially centered when viewed from the left-right direction of the pressing portion 35. The inner peripheral surface of the bearing 35A is formed smoothly and functions as a so-called resin bearing (resin bearing).

  A cylindrical shaft 36 </ b> A elongated in the left and right direction is inserted through the bearing 35 </ b> A of the pressing portion 35 in the left and right direction. The shaft 36A is made of a nonmagnetic stainless material, and its outer diameter is slightly smaller than the hole diameter of the bearing 35A. Similarly to the shaft 31A, the shaft 36A is rotated in both directions when a driving force is transmitted through a driving motor (not shown) or a driving gear meshed with the driving motor.

  Similar to the rubber roller 31B, a plurality of guide rollers 36 formed in an annular shape are passed through and fixed to the shaft 36A. Therefore, the guide roller 36 can smoothly rotate integrally with the shaft 36A with respect to the bearing 35A.

  Further, the length, interval, and the like of each part of the pressing unit 35 are appropriately designed so that the upper end of the guide roller 36 is positioned below the upper surface of the pressing unit 35 by a distance G substantially equal to the thickness of one bill BL1. .

  That is, in the magnetic detection unit 26, when the pressing unit 35 contacts the lower surface of the magnetic sensor 34, the gap G can be adjusted between the lower surface of the magnetic sensor 34 and the upper end of the guide roller 36.

  With this configuration, when the banknote BL is transported from the front side or the rear side along the transport path 24, the magnetic detection unit 26 presses the banknote BL against the lower surface of the magnetic sensor 34 by the guide roller 36, and moves the banknote BL to the traveling banknote BL. The magnetism of the bill BL is detected by the magnetic head 34A of the magnetic sensor 34 while following the rotation of the guide roller 36.

  At this time, the pressing unit 35 can maintain a substantially constant height regardless of the presence or absence of the banknote BL, because the gap G between the lower surface of the magnetic sensor 34 and the upper end of the guide roller 36 can be maintained. Almost no vibration.

[1-2-3. Configuration of second transport unit]
The second transport unit 27 (FIG. 3) includes a transport roller 37, a shaft 38, and a tension roller 39 corresponding to the transport roller 31, the shaft 32, and the tension roller 33 of the first transport unit 25, respectively.

  As shown in FIG. 4, the shaft 38 is formed in an elongated cylindrical shape on the left and right like the shaft 32, but the length in the left-right direction is about half of the shaft 32, and two are arranged side by side on the left and right. Has been. Similarly to the shaft 32, the shaft 38 is held so as to be swingable in the vertical direction with respect to the casing 21, is biased downward by a spring (not shown), and does not rotate.

  Two tension rollers 39 are provided on each shaft 38. Similar to the tension roller 33 (FIG. 5), the tension roller 39 is configured in the same way as a so-called ball bearing.

  Although the conveyance roller 37 is configured in the same manner as the conveyance roller 31, the number of rubber rollers 37B corresponding to the rubber roller 31B and the arrangement in the left-right direction are different. That is, four rubber rollers 37B, which are the same number as the tension rollers 39 on the shaft 37A, are arranged at positions corresponding to the tension rollers 39, respectively.

  With this configuration, the second transport unit 27, like the first transport unit 25, presses the tension roller 39 against the transport roller 37, and when the banknote BL is sandwiched in the transport path 24 between them, the tension roller 39 The rotational driving force of the transport roller 37 can be transmitted to the banknote BL while smoothly rotating the outer ring.

  Thereby, the 2nd conveyance part 27 can convey banknote BL forward or back along the conveyance path 24 similarly to the 1st conveyance part 25. FIG.

[1-2-4. Configuration of optical detector]
The optical detection unit 28 (FIG. 3) includes an upper light emitting unit 28A and a lower light receiving unit 28B. The light emitting unit 28A emits predetermined irradiation light downward. A part of the irradiation light passes through the banknote BL according to the ink or watermark of the banknote BL.

  The light receiving unit 28 </ b> B receives light from above, i.e., transmitted light partially transmitted through the banknote BL in the irradiation light from the light emitting unit 28 </ b> A, and sends the light reception result to the control unit 20. This transmitted light represents a light transmission pattern in the bill BL.

  With this configuration, the optical detection unit 28 can detect the transmission pattern of the bill BL and supply the detection result to the control unit 20.

  Incidentally, both of the light emitting unit 28A and the light receiving unit 28B of the optical detection unit 28 can emit and receive irradiation light with almost no influence of changes in the magnetic field from the surroundings. Further, neither the light emitting unit 28A nor the light receiving unit 28B has movable parts.

[1-2-5. Configuration of thickness detector]
The thickness detection unit 29 (FIG. 3) is configured around a reference roller 41 disposed on the lower side of the conveyance path 24 and a thickness detection roller 42 disposed on the upper side of the conveyance path 24.

  The reference roller 41 is made of a predetermined magnetic material having magnetism, is formed in a cylindrical shape that is long to the left and right as a whole, and is penetrated in the left-right direction by an elongated cylindrical shaft 41A. The shaft 41A is rotatably supported by the casing 29A of the thickness detector 29.

  Similar to the reference roller 41, the thickness detection roller 42 is made of a predetermined metal material having magnetism, is formed in a long cylindrical shape on the left and right, and is further penetrated in the left-right direction by an elongated cylindrical shaft 42A. The thickness detection roller 42 is attached to the bracket 43.

  The bracket 43 is made of a thin plate-shaped metal material that is thin vertically and horizontally, and the left and right end portions of the top plate are bent downward to form side plates, and the shaft 42A is formed on the front side of the left and right side plates. A shaft hole having a corresponding hole diameter is formed.

  The bracket 43 is configured to rotatably hold the thickness detection roller 42 at a position almost directly above the reference roller 41 by inserting a shaft 42A through shaft holes in the left and right side plates.

  The bracket 43 is provided with a rotation hole behind the shaft hole in the left and right side plates, and is attached to the housing 29A via a small cylindrical rotation shaft 44 so as to be rotatable. For this reason, the bracket 43 can displace the thickness detection roller 42 up and down by rotating about the rotation axis 44.

  Between the top plate of the bracket 43 and the top plate portion of the housing 29A, a spring 45 made of a coil spring is attached in a compressed state from the natural state.

  When the restoring force to the natural state acts on the spring 45, the ceiling plate of the bracket 43 is pressed downward against the housing 29A, and the thickness detection roller 42 is moved downward via the left and right side plates of the bracket 43. That is, it is pressed toward the reference roller 41.

  A displacement sensor 46 is provided above the bracket 43 in the housing 29A. The displacement sensor 46 detects the relative displacement amount of the top plate of the bracket 43 on the basis of the position when the thickness detection roller 42 contacts the reference roller 41, and the detection result is displayed on the control unit 20 (not shown). ).

  Based on the detection result, the control unit 20 determines whether the displacement amount corresponds to one bill BL or a plurality of bills.

  With this configuration, in the thickness detection unit 29, the thickness detection roller 42 is brought into contact with the reference roller 41 by the action of the spring 45 when nothing is conveyed to the conveyance path 24. At this time, the thickness detection unit 29 can detect that the bracket 43 and the thickness detection roller 42 are positioned at a reference height by the displacement sensor 46 and send the detection result to the control unit 20.

  On the other hand, in the thickness detection unit 29, when the bill BL is transported to the transport path 24, the bill BL is sandwiched between the thickness detection roller 42 and the reference roller 41. Thus, the bracket 43 and the thickness detection roller 42 are displaced upward. At this time, the thickness detection unit 29 can detect the displacement amount of the bracket 43 and the thickness detection roller 42 by the displacement sensor 46 and send the detection result to the control unit 20.

[1-3. Operation and effect]
In the above configuration, the discrimination unit 13 of the automatic teller machine 1 includes the pressing unit 35 of the magnetic detection unit 26 made of a resin material and forms a round hole-shaped bearing 35A, and the shaft of the guide roller 36 is formed on the bearing 35A. 36A was inserted.

  The pressing portion 35 rotatably supports the guide roller 36 via the shaft 36 </ b> A by the bearing 35 </ b> A, and presses the bill BL traveling on the transport path 24 against the lower surface of the magnetic sensor 34 via the guide roller 36.

  At this time, the guide roller 36 is rotationally driven together with the shaft 36A, but can be smoothly rotated by the bearing 35A acting as a resin bearing, and can continue to be pressed against the lower surface of the magnetic sensor 34 while conveying the bill BL.

  As a result, the magnetic head 34A of the magnetic sensor 34 can be kept in contact with the traveling bill BL, so that the magnetism of the bill BL can be read stably.

  In particular, in the magnetic detection unit 26 of the discrimination unit 13, a bearing 35A having no movable part is configured by a round hole formed in the pressing unit 35 made of a resin material. The shaft 36A inserted through the bearing 35A is made of a nonmagnetic stainless material.

  As a result, the magnetic detection unit 26 can eliminate in principle the change in the magnetic field caused by the rotation of the guide roller 36 that may have occurred when the component is magnetized in the configuration using the conventional ball bearing.

  That is, in the magnetic detection unit 26 of the discrimination unit 13, the guide roller 36 rotates in the very vicinity of the magnetic head 34A, but the surrounding magnetic field is not changed by the rotation. For this reason, the magnetic sensor 34 can accurately read the magnetism of the bill BL without detecting noise caused by the change of the magnetic field by the magnetic head 34A.

  Furthermore, in the magnetic detection part 26, since what is called a resin bearing was comprised by the bearing 35A and the axis | shaft 36A, the vibration generate | occur | produced when the guide roller 36 rotates can be suppressed rather than the case where the conventional ball bearing is used.

  Thereby, the magnetism detection unit 26 can greatly reduce the piezo noise that may be generated due to vibration in the magnetic sensor 34, and can greatly improve the accuracy of reading magnetism from the bill BL.

  In addition, the tension roller 33 is configured as a ball bearing and generates rolling resistance instead of frictional resistance during rotation. Therefore, the tension roller 33 has high wear resistance and can stably transport the bill BL over a long period of time. The cost of replacement parts can be reduced.

  In the magnetic detection unit 26, the gap between the upper surface of the pressing unit 35 and the upper end of the guide roller 36 is set to a gap G equivalent to the standard thickness of one bill BL. The height of the guide roller 36 is hardly changed regardless of the presence or absence of the bill BL between the upper end of the guide roller 36.

  That is, in the magnetic detection unit 26, even when the bill BL is being transported between the guide roller 36 and the magnetic sensor 34, the pressing unit 35 is kept almost in contact with the lower surface of the magnetic sensor 34. Therefore, vibration is hardly applied from the pressing portion 35 to the magnetic sensor 34, and the generation of so-called piezo noise can be significantly reduced.

By the way, in the thickness detection part 29 of the discrimination part 13, in order to detect the thickness of the conveyed banknote BL accurately, the reference | standard roller 41 and thickness detection roller which were comprised with the metal material which is hard to deform | transform rather than the resin material which is easy to deform | transform 42 is used.

  When such a roller made of a metal material is magnetized like the conventional ball bearing, there is a possibility that the surrounding magnetic field is changed by rotation. Further, in order to prevent such a change in the magnetic field, the discrimination unit 13 increases the number of man-hours for assembly work and maintenance work due to inspection work for the presence / absence of magnetization, demagnetization work when magnetized, and the like. There is also a problem.

  On the other hand, as described above, the optical detection unit 28 of the discrimination unit 13 has no portion that moves along with the conveyance of the banknote BL, and there is no fear of changing the surrounding magnetic field. In general, it is known that the influence of a magnetic field generation source decreases as the distance from the generation source increases.

  In consideration of such characteristics, the discrimination unit 13 is physically separated by disposing the optical detection unit 28 between the magnetic detection unit 26 and the thickness detection unit 29 in the front-rear direction.

  In addition, since the optical detector 28 uses a magnetic material in its housing and the like, an effect of shielding magnetism to some extent can be expected.

  As a result, the discrimination unit 13 can prevent the influence of the change in the magnetic field by the thickness detection unit 29 from reaching the magnetic sensor 34 of the magnetic detection unit 26 as much as possible, thereby reducing the magnetic detection accuracy in the magnetic sensor 34. It can be prevented in advance.

  According to the above configuration, the discrimination unit 13 of the automatic teller machine 1 has the bearing 35A formed in the pressing unit 35 made of a resin material in the magnetic detection unit 26, and the bill 35 is transferred to the magnetic sensor 34 by the bearing 35A. The shaft 36A of the guide roller 36 that is pressed against the lower surface of the shaft is rotatably supported. The guide roller 36 rotates as the bill BL travels along the transport path 24, but the bearing 35A is made of a resin material and has no moving parts, and the shaft 36A is made of a nonmagnetic material. As a result, the surrounding magnetic field is not changed. As a result, the magnetic detection unit 26 accurately reads the magnetism of the bill BL by the magnetic head 34A of the magnetic sensor 34 located in the vicinity of the guide roller 36 without changing the surrounding magnetic field by the rotating guide roller 36. Can do.

[2. Second Embodiment]
Compared with the automatic teller machine 1 according to the first embodiment (FIGS. 1 and 2), the automatic teller machine 101 according to the second embodiment has a discrimination unit 113 in place of the discrimination unit 13. Although different, other points are similarly configured.

[2-1. Configuration of the identification section]
The discrimination unit 113 is different from the discrimination unit 13 according to the first embodiment in that the discrimination unit 113 includes a first conveyance unit 125 and a second conveyance unit 127 instead of the first conveyance unit 25 and the second conveyance unit 27. However, the other points are configured similarly.

  As shown in FIG. 7 corresponding to FIG. 5, the first transport unit 125 is different in that it includes a tension roller 133 instead of the tension roller 33, but the transport roller 31 and the shaft 32 are configured similarly.

  The tension roller 133 is not a ball bearing as in the first embodiment, but a predetermined resin material is formed in an annular shape, and its outer shape is substantially the same as that of the tension roller 33.

  Further, the tension roller 133 is a so-called resin bearing because its inner diameter is slightly larger than the outer shape of the shaft 32 and its inner peripheral surface is smoothly configured. For this reason, when the tension roller 133 is inserted through the shaft 32, the tension roller 133 can smoothly rotate with respect to the shaft 32.

  Further, the second transport unit 127 has a configuration in which a tension roller 139 (FIG. 3) similar to the tension roller 133 of the first transport unit 125 is inserted through the shaft 38, and the tension roller 139 is smooth with respect to the shaft 38. Can be rotated.

  Thus, the 1st conveyance part 125 and the 2nd conveyance part 127 are made to rotate smoothly with respect to the shafts 32 and 38 by making the inner peripheral surfaces of the tension rollers 133 and 139 function as resin bearings, respectively. Yes.

[2-2. Operation and effect]
In the above configuration, the discrimination unit 113 of the automatic teller machine 101 according to the second embodiment presses the tension roller 133 against the transport roller 31 by the shaft 32 in the first transport unit 125, and according to the transport direction of the banknote BL. The conveyance roller 31 is rotationally driven in the rotation direction.

  Here, the first conveyance unit 125 rotates the conveyance roller 31 while smoothly rotating the tension roller 133 by the resin bearing between the tension roller 133 and the conveyance roller 31, that is, when the banknote BL is in the conveyance path 24. Force can be transmitted to this bill BL.

  As a result, the first transport unit 125 can transmit the rotational drive of the transport roller 31 to the banknote BL, and the driving force is not attenuated by the tension roller 133, so that the banknote BL can be transported reliably at a desired speed. can do.

  At this time, since the tension roller 133 is entirely made of a resin material, there is no fear that the component parts are magnetized, and the surrounding magnetic field is not changed with rotation.

  Further, the tension roller 133 has a simple structure and a small number of parts as compared with the tension roller 33 formed of the ball bearing in the first embodiment, so that the man-hours for the manufacturing cost reduction and the assembly work and the maintenance work are reduced. Can be reduced.

  Further, in the second transport unit 127 as well, like the first transport unit 125, the surrounding magnetic field is not changed when the tension roller 139 made of a resin material rotates.

  That is, in the discrimination unit 113, although the tension rollers 133 and 139 are disposed close to the front and rear of the magnetic sensor 34, the tension roller 133 and 139 does not affect the magnetic sensor 34 due to the change of the magnetic field. For this reason, the magnetic sensor 34 can accurately read the magnetism of the bill BL without detecting noise caused by the change of the magnetic field by the magnetic head 34A.

  In the discrimination unit 113, as in the first embodiment, the optical detection unit 28 is disposed between the magnetic detection unit 26 and the thickness detection unit 29 in the front-rear direction so that the two are physically separated from each other. did.

  Thereby, the discrimination unit 113 can prevent the influence of the change of the magnetic field by the thickness detection unit 29 from reaching the magnetic sensor 34 of the magnetic detection unit 26 as much as possible, and the magnetic detection accuracy in the magnetic sensor 34 can be reduced. It can be prevented in advance.

  According to the above configuration, the discrimination unit 113 of the automatic teller machine 101 according to the second embodiment is configured such that the tension roller 133 of the first transport unit 125 and the tension roller 139 of the second transport unit 127 are all made of a resin material. And the inner peripheral surface is made to act as a resin bearing. As a result, the discrimination unit 113 smoothly conveys the bills BL, while the surrounding magnetic field is not changed by the rotation of the tension rollers 133 and 139, and therefore noise caused by the change of the magnetic field by the magnetic head 34A of the magnetic sensor 34. The magnetism of the bill BL can be read with high accuracy without detecting.

[3. Third Embodiment]
Compared with the automatic teller machine 1 according to the first embodiment (FIGS. 1 and 2), the automatic teller machine 201 according to the third embodiment has a discrimination unit 213 that replaces the discrimination unit 13. Although different, other points are similarly configured.

[3-1. Configuration of the identification section]
The discrimination unit 213 is different from the discrimination unit 13 according to the first embodiment in that the discrimination unit 213 includes a first conveyance unit 225 and a second conveyance unit 227 that replace the first conveyance unit 25 and the second conveyance unit 27. However, the other points are configured similarly.

  Although the first transport unit 225 is different in that it includes a tension roller 233 instead of the tension roller 33, the transport roller 31 and the shaft 32 are configured similarly.

  The tension roller 233 is configured by a combination of an inner ring 233A, a ball 233B, and an outer ring 233C each having the same shape as the inner ring 33A, ball 33B, and outer ring 33C (FIG. 5) of the tension roller 33 in the first embodiment. .

  The inner ring 233A, the ball 233B, and the outer ring 233C are all made of a nonmagnetic material such as nonmagnetic stainless steel (austenitic stainless steel) or ceramic.

  For this reason, the tension roller 233 is not likely to be magnetized in any of the inner ring 233A, the ball 233B, and the outer ring 233C. Therefore, the tension roller 233 has no fear of changing the surrounding magnetic field when the outer ring 233C is rotated.

  The second transport unit 227 differs in that it includes a tension roller 239 instead of the tension roller 39, but the transport roller 37 and the shaft 38 are configured similarly. Similar to the tension roller 233, the tension roller 239 is a ball bearing made of a nonmagnetic material.

  As described above, in the first transport unit 225 and the second transport unit 227, the inner ring, the ball, and the outer ring of the tension rollers 233 and 239 are all made of a non-magnetic material.

[3-2. Operation and effect]
In the above configuration, the discrimination unit 213 of the automatic teller machine 201 according to the third embodiment presses the tension roller 233 against the transport roller 31 by the shaft 32 in the first transport unit 225, and according to the transport direction of the banknote BL. The conveyance roller 31 is rotationally driven in the rotation direction.

  Here, when the banknote BL is present between the tension roller 233 and the transport roller 31, that is, when the banknote BL is in the transport path 24, the first transport unit 225 rotates the driving force of the transport roller 31 while smoothly rotating the outer ring 233 </ b> C of the ball bearing. Can be transmitted to the bill BL.

  As a result, the first transport unit 225 can transmit the rotational driving of the transport roller 31 to the banknote BL, and the driving force is not attenuated by the tension roller 233, so that the banknote BL can be transported reliably at a desired speed. can do.

  At this time, since the tension roller 233 is entirely made of a non-magnetic material, there is no fear that the components are magnetized, and the surrounding magnetic field is not changed with the rotation of the outer ring 233C.

  Further, the tension roller 233 is configured as a ball bearing in the same manner as the tension roller 33 according to the first embodiment, and rolling resistance is generated instead of friction resistance at the time of rotation. Therefore, wear resistance is high and stable over a long period of time. The outer ring 233C can be rotated to reduce the man-hours for maintenance work, the cost of replacement parts, and the like.

  Further, in the second transport unit 227 as well as the first transport unit 225, the surrounding magnetic field is not changed when the tension roller 239 made of a nonmagnetic material rotates.

  That is, in the discrimination unit 213, although the tension rollers 233 and 239 are disposed close to the front and rear of the magnetic sensor 34, the tension roller 233 and 239 does not affect the magnetic sensor 34 due to the change of the magnetic field. For this reason, the magnetic sensor 34 can accurately read the magnetism of the bill BL without detecting noise caused by the change of the magnetic field by the magnetic head 34A.

  In the discrimination unit 213, as in the first embodiment, the optical detection unit 28 is disposed between the magnetic detection unit 26 and the thickness detection unit 29 in the front-rear direction so that they are physically separated from each other. did.

  As a result, the discrimination unit 213 can prevent the influence of the change in the magnetic field by the thickness detection unit 29 from reaching the magnetic sensor 34 of the magnetic detection unit 26 as much as possible, and decrease the detection accuracy of magnetism in the magnetic sensor 34. It can be prevented in advance.

  According to the above configuration, the discrimination unit 213 of the automatic teller machine 201 according to the third embodiment is configured such that the tension roller 233 of the first transport unit 225 and the tension roller 239 of the second transport unit 227 are all made of a nonmagnetic material. It is constructed and operated in the same way as a general ball bearing. As a result, the discrimination unit 213 smoothly conveys the banknote BL, but the surrounding magnetic field is not changed by the rotation of the outer ring in the tension rollers 233 and 239. Therefore, the magnetic head 34A of the magnetic sensor 34 causes a change in the magnetic field. It is possible to accurately read the magnetism of the bill BL without detecting detected noise.

[4. Fourth Embodiment]
Compared with the automatic teller machine 1 (FIGS. 1 and 2) according to the first embodiment, the automatic teller machine 301 according to the fourth embodiment has a discrimination unit 313 that replaces the discrimination unit 13. Although different, other points are similarly configured.

[4-1. Configuration of the identification section]
The discrimination unit 313 is different from the discrimination unit 13 according to the first embodiment in that the discrimination unit 313 includes a first conveyance unit 325 and a second conveyance unit 327 instead of the first conveyance unit 25 and the second conveyance unit 27. However, the other points are configured similarly.

  As shown in FIG. 8 corresponding to FIG. 5, the first transport unit 325 is different in that it includes a tension roller 333 instead of the tension roller 33, but the transport roller 31 and the shaft 32 are configured similarly.

  The tension roller 333 includes an inner ring 333A, a ball 333B, and an outer ring 333C corresponding to the inner ring 33A, the ball 33B, and the outer ring 33C in the first embodiment, respectively.

  Although the inner ring 333A has the same inner diameter as the inner ring 33A, the outer diameter is smaller. Further, the outer ring 333C is smaller in both the inner diameter and the outer diameter than the outer ring 33C.

  That is, the inner ring 333A, the ball 333B, and the outer ring 333C form a ball bearing that has the same inner diameter but a smaller outer diameter as compared to the tension roller 33 in the first embodiment. Incidentally, the inner ring 333A is fixed to the shaft 32 in the same manner as the inner ring 33A.

  Further, a resin roller 333D in which a resin material is formed in an annular shape is fitted outside the outer ring 333C. The resin roller 333D has an inner diameter that is substantially the same as the outer diameter of the outer ring 333C, while its outer diameter is substantially the same as the outer diameter of the outer ring 33C in the first embodiment.

  That is, the tension roller 333 is configured to be approximately the same size as the tension roller 33 as a whole, and has a ball bearing whose outer shape is smaller than that of the tension roller 33, and further, a resin roller 333D that is a non-magnetic material. The outer periphery is covered.

  For this reason, the tension roller 333 can smoothly rotate the outer ring 333C and the resin roller 333D integrally with the inner ring 333A fixed to the shaft 32 by a function as a ball bearing.

  The second transport unit 327 has a configuration in which a tension roller 339 (FIG. 3) similar to the tension roller 333 of the first transport unit 325 is inserted through the shaft 38. The resin roller can be smoothly rotated integrally.

  As described above, the first transport unit 325 and the second transport unit 327 keep the outer diameters of the ball bearings in the tension rollers 333 and 339 small, and rotate the outer ring and the resin roller attached to the outer ring integrally. ing.

[4-2. Operation and effect]
In the above configuration, the discrimination unit 313 of the automatic teller machine 301 according to the fourth embodiment presses the tension roller 333 against the transport roller 31 by the shaft 32 in the first transport unit 325 and responds to the transport direction of the banknote BL. The conveyance roller 31 is rotationally driven in the rotation direction.

  Here, the first transport unit 325 smoothly rotates the outer ring 333C and the resin roller 333D by acting the ball bearing of the tension roller 333 between the tension roller 333 and the transport roller 31, that is, when the bill BL is in the transport path 24. The rotational driving force of the transport roller 31 can be transmitted to the bill BL.

  As a result, the first transport unit 325 can transmit the rotational driving of the transport roller 31 to the banknote BL, and the driving force is not attenuated by the tension roller 333, so that the banknote BL is reliably transported at a desired speed. can do.

  Here, the tension roller 333 has a resin roller 333D attached around the outer ring 333C and an outer diameter that is the same as that of the tension roller 33 (FIG. 5), that is, the outer diameter of the outer ring 333C is smaller than that of the outer ring 33C. It is configured.

  Therefore, in the discrimination unit 313, the distance between the magnetic sensor 34 and the outer ring 333C, which is a rotating magnetic body, is set to the first while the distance from the magnetic sensor 34 to the tension roller 333 is kept equal to that in the first embodiment. The distance from the embodiment can be increased.

  Further, the tension roller 333 is configured as a ball bearing in the same manner as the tension roller 33 according to the first embodiment, and generates rolling resistance instead of friction resistance during rotation. Therefore, the wear roller has high wear resistance and is stable over a long period of time. Further, the outer ring 333C and the resin roller 333D can be rotated, and the man-hours for maintenance work, the cost of replacement parts, and the like can be reduced.

  In the discrimination unit 313, the second transport unit 327 also has an outer ring, which is a rotating magnetic body, and the magnetic sensor 34 while maintaining the distance from the magnetic sensor 34 to the tension roller 339 equivalent to that of the first embodiment. Can be made farther than in the first embodiment.

  That is, in the discrimination unit 313, although the tension rollers 333 and 339 are disposed close to the front and rear of the magnetic sensor 34, the influence of the change in the magnetic field exerted on the magnetic sensor 34 from the tension rollers 333 and 339 is remarkably reduced. Can be made. For this reason, the magnetic sensor 34 can significantly reduce noise caused by a change in the magnetic field detected by the magnetic head 34A, and can read the magnetism of the bill BL with high accuracy.

  Further, in the discrimination unit 313, as in the first embodiment, by arranging the optical detection unit 28 between the magnetic detection unit 26 and the thickness detection unit 29 in the front-rear direction, the two are physically separated from each other. did.

  Thereby, the discrimination unit 313 can prevent the influence of the change of the magnetic field by the thickness detection unit 29 from reaching the magnetic sensor 34 of the magnetic detection unit 26 as much as possible, and the magnetic detection accuracy of the magnetic sensor 34 can be reduced. It can be prevented in advance.

  According to the above configuration, the discrimination unit 313 of the automatic teller machine 301 according to the fourth embodiment is configured so that the outer diameters of the ball bearings in the tension rollers 333 and 339 are set in the first transport unit 325 and the second transport unit 327. The resin roller was kept small and a resin roller was attached around it, and the resin roller was rotated integrally with the outer ring when the bill BL was conveyed. As a result, the discrimination unit 313 can keep the distance to the rotating magnetic body while keeping the outer diameter of each tension roller and the distance from the magnetic sensor 34 to each tension roller equivalent to those in the first embodiment. The influence of the change of the magnetic field on the magnetic head 34A of the magnetic sensor 34 can be reduced, and the magnetism of the bill BL can be read with high accuracy.

[5. Fifth embodiment]
Compared with the automatic teller machine 1 according to the first embodiment (FIGS. 1 and 2), the automatic teller machine 401 according to the fifth embodiment has a discrimination unit 413 that replaces the discrimination unit 13. Although different, other points are similarly configured.

[5-1. Configuration of the identification section]
The discrimination unit 413 differs from the discrimination unit 13 according to the first embodiment in that it has a magnetic detection unit 426 that replaces the magnetic detection unit 26, but is configured in the same manner for other points.

  As shown in FIG. 9 corresponding to FIG. 6, the magnetic detection unit 426 has a pressing unit 435 instead of the pressing unit 35 as compared with the magnetic detection unit 26 in the first embodiment, The point which has the relay part 441 differs greatly.

  The pressing portion 435 is formed to have substantially the same outer shape as the pressing portion 35 according to the first embodiment, but a bearing 435A made of a so-called ball bearing is embedded in place of the bearing 35A. Below the pressing portion 435, a spring 35B similar to that of the first embodiment is attached.

  Further, the pressing portion 435 is positioned outward from the left and right end portions of the magnetic sensor 34, and the shaft 436A of the guide roller 36 is aligned with the position of the pressing portion 435 in the first embodiment. The shaft 36A extends in the left-right direction.

  A relay unit 441 is interposed between the pressing unit 435 and the magnetic sensor 34. The relay portion 441 has a shape in which a portion located on the upper side of the pressing portion 435 and a portion located on the lower side of the magnetic sensor 34 are joined. They are connected to each other by surrounding portions not shown. Further, the relay portion 441 is made of a relatively hard predetermined resin material, but has some elasticity.

  The relay portion 441 is in contact with the lower surface of the magnetic sensor 34 on the upper surface 441B provided on the left and right inner sides, and is in contact with the upper surface of the pressing portion 435 on the lower surface 441A provided on the outer side. In addition, the lower surface 441A and the upper surface 441B of the relay portion 441 are formed so that their heights, that is, positions in the vertical direction are substantially equal to each other.

  With this configuration, the magnetic detection unit 426 lifts the pressing unit 435 upward by the restoring force of the spring 35B, and causes the upper surface of the pressing unit 435 to abut the lower surface 441A of the relay unit 441. Further, the magnetic detection unit 426 lifts the relay unit 441 together with the pressing unit 435 by the restoring force of the spring 35 </ b> B so that the upper surface 441 </ b> B of the relay unit 441 contacts the lower surface of the magnetic sensor 34.

  At this time, since the magnetic detection unit 426 has the lower surface 441A and the upper surface 441B having substantially the same height, the gap between the lower surface of the magnetic sensor 34 and the upper end of the guide roller 36 is the same as in the first embodiment. The distance G can be set to be approximately equal to the thickness of one bill BL.

  As described above, in the magnetic detection unit 426, the pressing roller 435 is pressed against the magnetic sensor 34 via the relay unit 441, thereby separating the guide roller 36 from the lower surface of the magnetic sensor 34 by the gap G and from the magnetic sensor 34. A bearing 435A made of a ball bearing is positioned at a location separated in the left-right direction.

[5-2. Operation and effect]
In the above configuration, the discrimination unit 413 of the automatic teller machine 401 according to the fifth embodiment is configured such that the magnetic detection unit 426 uses the guide roller 36 to detect the bill BL conveyed on the conveyance path 24 (FIG. 3) with the magnetic sensor. 34 is brought into contact with the lower surface.

  At this time, the guide roller 36 rotates the inner ring of the bearing 435A formed of a ball bearing integrally with the shaft 436A as the bill BL is conveyed. For this reason, if the inner ring is magnetized, the bearing 435A changes the surrounding magnetic field as the guide roller 36 rotates.

  However, in the magnetic detection part 426, the relay part 441 is interposed between the magnetic sensor 34 and the pressing part 435, and the distance from the magnetic sensor 34 to the bearing 435A is separated to some extent in the left-right direction.

  For this reason, the magnetic detection part 426 can suppress the influence which the change of the magnetic field by bearing 435A has on the magnetic sensor 34 very small, and makes the said magnetic sensor 34 detect the magnetism of the banknote BL, hardly detecting noise. Can do.

  Further, the pressing portion 435 constitutes a bearing 435A by a ball bearing similar to the tension roller 33 (FIG. 5), and generates rolling resistance instead of friction resistance at the time of rotation. Therefore, the pressing portion 435 is more durable than using a resin bearing. Can greatly increase.

  Further, in the magnetic detection unit 426, a relay unit 441 is interposed between the pressing unit 435 and the magnetic sensor 34. For this reason, the relay unit 441 attenuates the vibration transmitted to the magnetic sensor 34 by its elasticity even if the pressing unit 435 causes vertical vibrations by the guide roller 36 that rotates as the bill BL is conveyed. Can be absorbed.

  As a result, the relay unit 441 can greatly reduce the piezo noise that may be generated due to vibration in the magnetic sensor 34, and can greatly increase the accuracy of reading the magnetism from the bill BL.

  In the discrimination unit 413, as in the first embodiment, the optical detection unit 28 is disposed between the magnetic detection unit 426 and the thickness detection unit 29 in the front-rear direction so that the two are physically separated. did.

  As a result, the discrimination unit 413 can prevent the influence of the change in the magnetic field by the thickness detection unit 29 from reaching the magnetic sensor 34 of the magnetic detection unit 426 as much as possible, and decrease the magnetic detection accuracy in the magnetic sensor 34. It can be prevented in advance.

  According to the above configuration, the discrimination unit 413 of the automatic teller machine 401 according to the fifth embodiment interposes the relay unit 441 between the magnetic sensor 34 and the pressing unit 435 in the magnetic detection unit 426, and The distance from the magnetic sensor 34 to the bearing 435A made of a ball bearing was separated to some extent in the left-right direction. Thereby, the magnetic detection part 426 can suppress the influence which the change of the magnetic field by 435A has on the magnetic sensor 34 very small, and makes the magnetic sensor 34 detect almost no noise, and can detect the magnetism of the bill BL. Can do.

[6. Sixth Embodiment]
Compared with the automatic teller machine 1 according to the first embodiment (FIGS. 1 and 2), the automatic teller machine 501 according to the sixth embodiment has a discrimination unit 513 that replaces the discrimination unit 13. Although different, other points are similarly configured.

[6-1. Configuration of the identification section]
Although the discrimination part 513 differs in the point which has the magnetic detection part 526 replaced with the magnetic detection part 26 compared with the discrimination part 13 by 1st Embodiment, it is comprised similarly about another point.

  As shown in FIG. 10 corresponding to a part of FIG. 3, the magnetic detection unit 526 has a magnetic shielding plate 534 in the vicinity of the magnetic sensor 34 as compared with the magnetic detection unit 26 in the first embodiment. However, the other points are configured similarly.

  The magnetic shielding plate 534 is made of a material that shields or greatly attenuates the magnetism, and the magnetic sensor from the front end and the rear end of the thin plate-like top plate 534A formed slightly larger than the upper surface of the magnetic sensor 34. A thin plate-like front side plate 534B and a rear side plate 534C are provided so as to cover the front and rear surfaces of 34 respectively.

  Incidentally, the lower ends of the front side plate 534B and the rear side plate 534C in the magnetic shielding plate 534 are positioned slightly above the lower surface of the magnetic sensor 34, and the conveyance path 24 is secured so as not to prevent the conveyance of the bills BL. ing.

  As described above, the front, rear and upper sides of the magnetic sensor 34 are almost covered with the magnetic shielding plate 534. For this reason, the magnetic shielding plate 534 can eliminate or greatly reduce the influence of the change of the magnetic field in front of, behind and above the magnetic sensor 34.

[6-2. Operation and effect]
In the above configuration, the discrimination unit 513 of the automatic teller machine 501 according to the sixth embodiment is provided with the magnetic shielding plate 534 in the magnetic detection unit 526 so as to cover the front, rear and upper sides of the magnetic sensor 34.

  In the discrimination unit 513, the tension rollers 33 and 39 respectively disposed close to the front and rear of the magnetic sensor 34 rotate the outer ring 33C and the like as the bill BL is conveyed. At this time, if the outer ring 33C and the like are magnetized, the tension rollers 33 and 39 change the surrounding magnetic field as needed.

  On the other hand, the magnetic detection unit 526 can block or greatly attenuate the magnetism from the front, rear, and upper sides of the magnetic sensor 34 by the magnetic shielding plate 534.

  As a result, the magnetic sensor 34 can accurately detect the magnetism of the bill BL without detecting the noise accompanying the magnetic field change by the tension rollers 33 and 39 arranged in proximity, or by greatly reducing the detection level. it can.

  From another viewpoint, the discrimination unit 513 can use a ball bearing made of a magnetic material in the tension rollers 33 and 39 of the first transport unit 25 and the second transport unit 27. The durability can be greatly increased as compared with the case where a bearing is used.

  In addition, inside the automatic teller machine 501, as described above, magnetic noise such as a motor for transporting the bills BL in the transport unit 12, a solenoid for switching the transport path, or various cooling fans (not shown). Most of the generation sources are arranged above the conveyance path 24 of the discrimination unit 513.

  For this reason, in the magnetic detection unit 526 of the discrimination unit 513, the influence of the magnetic field change caused by the magnetic noise generation source can be blocked or greatly attenuated by the magnetic shielding plate 534. Magnetism can be detected with high accuracy.

  In the discrimination unit 513, as in the first embodiment, the optical detection unit 28 is disposed between the magnetic detection unit 526 and the thickness detection unit 29 in the front-rear direction so that the two are physically separated from each other. did.

  As a result, the discrimination unit 513 can prevent the influence of the change in the magnetic field by the thickness detection unit 29 from reaching the magnetic sensor 34 of the magnetic detection unit 526 as much as possible, thereby reducing the detection accuracy of magnetism in the magnetic sensor 34. It can be prevented in advance.

  According to the above configuration, the discrimination unit 513 of the automatic teller machine 501 according to the sixth embodiment blocks or greatly attenuates the magnetism so that the magnetic detection unit 526 covers the front, rear, and upper sides of the magnetic sensor 34. A magnetic shielding plate 534 was provided. As a result, even if the surrounding magnetic field changes with the rotation of the tension rollers 33 and 39 disposed close to the front and rear of the magnetic sensor 34, the magnetic detection unit 526 blocks the influence by the magnetic shielding plate 534 or increases the magnetic field. Can be attenuated. As a result, the magnetic sensor 34 can accurately detect the magnetism of the bill BL without detecting noise due to a change in the surrounding magnetic field or by greatly reducing the detection level.

[7. Other Embodiments]
In the above-described first embodiment, the case where the pressing portion 35 is made of a predetermined resin material and the bearing 35A is formed by drilling a round hole penetrating left and right has been described.

  However, the present invention is not limited to this, and the pressing portion 35 may be formed of various materials, and the bearing 35A may be formed of the materials. Alternatively, the pressing portion 35 is made of an arbitrary material, and a relatively large round hole is formed, and by inserting an annular part into the round hole, the part functions as a bearing. You may make it comprise a bearing by the combination of these. In this case, it is only necessary that the shaft 36A can be smoothly rotated by forming the inner peripheral surface of the bearing smoothly. In short, it is only necessary that the shaft 36A can be supported so as to smoothly rotate without accompanying the rotation of a magnetic material such as an outer ring in the ball bearing.

  In the second embodiment described above, the case where the tension rollers 133 and 139 are formed of resin bearings has been described.

  However, the present invention is not limited to this, and they may be made of a nonmagnetic material such as nonmagnetic stainless steel (austenitic stainless steel) or ceramic. Moreover, not only a nonmagnetic material but the material which cannot be magnetized easily may be used.

  Further, in the above-described third embodiment, the case where all of the inner ring 233A, the ball 233B, and the outer ring 233C constituting the tension roller 233 formed of a ball bearing are made of a nonmagnetic material has been described.

  However, the present invention is not limited to this, and for example, only the outer ring 233C or both the outer ring 233C and the ball 233B may be made of a non-magnetic material, so that the change in the magnetic field due to rotation may be suppressed to be small.

  Furthermore, in the fifth embodiment described above, a case has been described in which the pressing portion 435 and the relay portion 441 are configured as independent parts, and the left and right relay portions 441 are connected by an outer peripheral portion (not shown). .

  However, the present invention is not limited to this. For example, the left and right relay portions 441 may be configured independently of each other and may be fixed to the housing of the discrimination portion 413. Alternatively, the relay portion 441 may be omitted and the pressing portion 435 An arm portion having the same function as that of a part of the relay portion 441 may be extended inward, and may be brought into contact with the lower surface of the magnetic sensor 34 via the arm portion.

  In this case, it is only necessary that the bearing 435A be positioned outwardly on the left and right sides below the magnetic sensor 34 and that the gap G be formed between the lower surface of the magnetic sensor 34 and the upper end of the guide roller 36. In this case, it is preferable that vibration generated in the pressing portion 435 due to the rotation of the guide roller 36 can be attenuated or absorbed by the relay portion 441 or the arm portion.

  Further, in the above-described fifth embodiment, the case where the bearing 435A formed of a ball bearing is embedded in the pressing portion 435 has been described.

  However, the present invention is not limited to this. For example, as in the first embodiment, a bearing made of a resin bearing may be formed by a round hole drilled in the resin material, or the tension in the third embodiment. Similarly to the roller 233, a ball bearing made of a nonmagnetic material may be embedded.

  Further, in the first and fifth embodiments described above, a gap G corresponding to the thickness of one bill BL is provided between the lower surface of the magnetic sensor 34 and the upper end of the guide roller 36. Said about the case.

  However, the present invention is not limited to this, and an arbitrary interval may be provided between the lower surface of the magnetic sensor 34 and the upper end of the guide roller 36, or the guide roller 36 may be brought into contact with the lower surface of the magnetic sensor 34. Also good. In this case, it is only necessary that the bill BL can be conveyed while being pressed against the lower surface of the magnetic sensor 34 by the guide roller 36.

  Furthermore, in the above-described sixth embodiment, the case where the magnetic shielding plate 534 covers the upper, front and rear sides of the magnetic sensor has been described.

  However, the present invention is not limited to this. For example, as shown in FIG. 11 corresponding to FIG. 10, a magnetic shielding plate 634 may be provided in the magnetic detection unit 626 instead of the magnetic shielding plate 534.

  The magnetic shielding plate 634 is a lower surface plate from the front plate 634B and the rear plate 634C respectively corresponding to the front plate 534B and the rear plate 534C of the magnetic shield plate 534 toward the magnetic sensor 34, that is, rearward or forward. 634D and 634E are extended.

  For this reason, the magnetic shielding plate 634 can further reduce the influence on the magnetic sensor 34 due to the change of the magnetic field around the magnetic sensor 34 compared to the magnetic shielding plate 534.

  Further, in the sixth embodiment described above, the case where the magnetic shielding plate 534 is provided so as to cover the magnetic sensor 34 from the upper side, the front side, and the rear side, that is, from the outside.

  However, the present invention is not limited to this. For example, a magnetic shielding plate may be built in the magnetic sensor 34.

  Furthermore, in the above-described sixth embodiment, the magnetic shielding plate 534 is configured by the top plate 534A, the front side plate 534B, and the rear side plate 534C that are respectively positioned in three directions such as the upper, front, and rear sides of the magnetic sensor 34. Said about the case.

  However, the present invention is not limited to this. For example, when it is known that the influence of the change in the magnetic field from above is small, the top plate 534A is omitted, and the magnetic shielding plate 534 is formed only by the front side plate 534B and the rear side plate 534C. You may make it comprise. In this case, what is necessary is to provide a magnetic shielding plate at a location that is mainly in the direction in which components or the like that change the magnetic field are provided as viewed from the magnetic head 34A and does not hinder the conveyance of the bills BL.

  Further, in the above-described first embodiment, the case where the optical detection unit 28 is provided between the magnetic detection unit 26 and the thickness detection unit 29 in the front-rear direction in the discrimination unit 13 has been described.

  However, the present invention is not limited to this. For example, when it is found that the influence of the change in the magnetic field on the magnetic sensor 34 by the reference roller 41 and the thickness detection roller 42 of the thickness detection unit is small, the magnetic detection unit 26 and the thickness. You may arrange | position so that the detection part 29 may adjoin. The same applies to the second to sixth embodiments.

  Furthermore, in the first embodiment described above, the modules such as the first transport unit 25, the magnetic detection unit 26, the second transport unit 27, the optical detection unit 28, and the thickness detection unit 29 are provided in the casing 21 of the discrimination unit 13. The case where it was made to provide was described.

  However, the present invention is not limited to this, and it is only necessary that the discrimination unit 13 can determine the type, authenticity, and the like of the banknote BL based on at least the magnetic detection result in the magnetic detection unit 26, and according to the determination method. What is necessary is just to combine each conveyance part suitably, such as the optical detection part 28 and the thickness detection part 29 grade | etc.,. The same applies to the fifth and sixth embodiments.

  Moreover, in 2nd Embodiment mentioned above, the banknote BL is conveyed through the magnetic detection part 26 by having at least any one of the 1st conveyance part 125 or the 2nd conveyance part 127 in the discrimination part 113. As long as it can be transported along. The same applies to the third and fourth embodiments.

  Furthermore, in the first to sixth embodiments described above, the magnetic detection unit 26, 426, or 526, the first transport unit 125, 225, or 325 and the second transport unit 127, 227, or 327 are each configured independently. The case where it was to be described.

  However, the present invention is not limited to this, and these may be combined as appropriate. For example, in the discrimination unit, the pressing unit 35 according to the first embodiment may be combined with the tension rollers 133 and 139 according to the second embodiment, and further the magnetic shielding plate 534 according to the sixth embodiment is combined. May be. Alternatively, for example, in the discrimination unit, the pressing unit 435 and the relay unit 441 according to the fifth embodiment may be combined with the tension rollers 333 and 339 according to the fourth embodiment.

  In these cases, by combining a plurality of embodiments, the influence of the change in the magnetic field from the surroundings on the magnetic sensor 34 can be reduced synergistically, and the magnetic detection accuracy from the banknote BL by the magnetic sensor 34 can be increased. It can be significantly improved.

  Furthermore, in 1st Embodiment mentioned above, the case where the discrimination process was performed about the banknote as a medium in the discrimination part 13 of the automatic teller machine 1 which transacts cash, such as a banknote, was described.

  However, the present invention is not limited to this. For example, the present invention may be applied to various devices that perform a discrimination process on a medium having magnetism such as a gift certificate, a cash voucher, an admission ticket, or a magnetic card. good. In this case, what is necessary is just to design suitably the conveyance path 24 in the conveyance part 12, the discrimination part 13, etc. according to the shape of a medium. The same applies to the second to fifth embodiments.

  Furthermore, in the first embodiment described above, the medium discrimination device includes the magnetic sensor 34 as the magnetic detection unit, the guide roller 36 as the roller, the bearing 35A as the bearing, and the control unit 20 as the discrimination control unit. The case where the discrimination part 13 as is comprised was described.

  However, the present invention is not limited to this, and the medium discrimination device may be constituted by a magnetic detection unit, a roller, a bearing, and a discrimination control unit having various other configurations.

  Further, in the first embodiment described above, the customer service unit 3 as a reception unit, the conveyance unit 12 as a conveyance unit, a magnetic sensor 34 as a magnetic detection unit, a guide roller 36 as a roller, and a bearing The case where the automatic teller machine 1 as the medium transaction apparatus is configured by the bearing 35A and the control unit 20 as the discrimination control unit has been described.

  However, the present invention is not limited to this, and the medium transaction apparatus may be configured by a reception unit, a conveyance unit, a magnetic detection unit, a roller, a bearing, and a discrimination control unit having various other configurations. .

  Furthermore, in the fourth embodiment described above, the magnetic sensor 34 as a magnetic detection unit, the tension roller 333 as a roller, the inner ring 333A, the ball 333B and the outer ring 333C as bearings, and the control unit as a discrimination control unit The case where the discriminating unit 313 as the medium discriminating apparatus is configured with the above-mentioned 20 is described.

  However, the present invention is not limited to this, and the medium discrimination device may be constituted by a magnetic detection unit, a roller, a bearing, and a discrimination control unit having various other configurations.

  The present invention can also be used in various medium discrimination devices that discriminate by detecting magnetism while conveying a medium having magnetism.

  1, 101, 201, 301, 401, 501 ... Automatic teller machine, 3 ... Customer service, 12 ... Transport, 13, 113, 213, 313, 413, 513 ... Discrimination, 20 ... Control , 21... Casing, 24... Transport path, 25, 125, 225, 325... First transport section, 26, 426, 526... Magnetic detection section, 27, 127, 227, 327. Transport unit, 28 ... Optical detection unit, 29 ... Thickness detection unit, 31, 37 ... Transport roller, 32, 38 ... Shaft, 33, 133, 233, 333, 39, 139, 239, 339 ... Tension Roller, 33A, 333A ... Inner ring, 33B, 333B ... Ball, 33C, 333C ... Outer ring, 34 ... Magnetic sensor, 34A ... Magnetic head, 35, 435 ... Pressing part, 35A, 435A ... Bearing, 36 …… Guy Roller, 36A, 436A ...... axis, 333D ...... resin roller, 441 ...... relay unit, 534 ...... magnetic shielding plate.

Claims (6)

In the medium discrimination device provided with the discrimination control unit for discriminating the medium based on the magnetic detection result by the magnetic head,
A roller disposed in the vicinity of the magnetic head and rotating in contact with the medium so as to convey the medium while contacting the medium;
A rotating shaft of the roller;
A bearing that supports the rotating shaft;
A medium discrimination device comprising: a relay unit that separates a distance between the magnetic head and the bearing. The medium discrimination device according to claim 1, further comprising an urging member that urges the magnetic head to approach the roller. The medium discrimination device according to claim 1, wherein the relay unit separates a distance between the magnetic head and the bearing in a direction along the rotation axis. The medium discrimination device according to claim 1, wherein the relay unit has elasticity. The relay section
The medium discrimination device according to claim 1, wherein a distance between the magnetic head and the bearing is separated by a distance equivalent to a thickness of the medium. In the medium discrimination device provided with the discrimination control unit for discriminating the medium based on the magnetic detection result by the magnetic head,
A reception unit that accepts transactions related to the medium;
A transport unit for transporting the medium received by the reception unit;
A roller disposed in the vicinity of the magnetic head and rotating in contact with the medium so as to convey the medium while contacting the medium;
A rotating shaft of the roller;
A bearing that supports the rotating shaft;
A medium transaction apparatus comprising: a relay unit that separates a distance between the magnetic head and the bearing.

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