JP2011248775A - Coin identification sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately detect magnetic field variation by forming a homogeneous magnetic field and to downsize.SOLUTION: A magnetic-flux generating coil is placed to face other coils across a conveyance surface. A coin identification sensor is constructed so as to give a prescribed slope to the end surface on the conveyance-surface side of at least the magnetic-flux generating one of the coils. In addition, the coin identification sensor is constructed to have an adjustment mechanism to adjust, according to the diameter of a coin, the slope and the position of a magnetically permeable plate placed between the conveyance surface and the coil.

Description

  The present invention relates to a coin identification sensor that detects a magnetic field change when a coin transported along a transport surface passes a predetermined detection section, and in particular, detects a magnetic field change with high accuracy by forming a uniform magnetic field. The present invention also relates to a coin identification sensor that can be downsized.

  Conventionally, a magnetic sensor that forms a magnetic field by arranging magnetic poles to face each other, detects a magnetic field change that occurs when the subject passes through the magnetic field, and measures the shape and thickness of the subject is known. Yes.

  Among such magnetic sensors, there is a magnetic sensor that is provided in a coin identifying device that identifies true / false or correctness of a coin and is used as a coin identifying sensor. For example, Patent Document 1 discloses a coin identification sensor that magnetically measures the diameter, thickness, edge, and the like of a coin conveyed along a conveyance surface.

  In such a coin identification sensor of Patent Document 1, a first coil and a second coil are arranged to face each other, and an excitation current is applied to one coil to form a magnetic field. In addition, the coil here refers to the general core coil which wound the winding around the core.

  Here, in the technique of Patent Document 1, the transfer surface of the coin is provided so as to penetrate the magnetic field in a direction orthogonal to the facing direction of the coils. Hereinafter, the direction in which the transport surface is provided is described as “X direction”, and the direction orthogonal to the X direction (that is, the direction in which the coils face each other) is described as “Y direction”.

JP 2001-229428 A

  However, when the technique of Patent Document 1 is used, there is a problem that the direction of the magnetic flux passing through the subject coin is difficult to be uniform, in other words, the magnetic field is likely to be non-uniform.

  Specifically, when it is desired to detect a change in the magnetic field with high accuracy, it is preferable that the magnetic flux passing through the coin in the detection section is only the Y direction component, but due to the nature of the magnetic field lines that close in a loop, the coil in the detection section The X direction component was easy to be added to the magnetic flux toward the outer edge.

  In this respect, if the width of the coil is made larger than the width of the conveyance path to avoid the magnetic flux in the vicinity of the outer edge, and only the magnetic flux at the center of the coil is used, the X-direction component of the magnetic flux passing through the coin is reduced. It is possible to reduce.

  However, when such measures are taken, the casing of the coin identification sensor itself is increased in size, and the signal-to-noise ratio (hereinafter referred to as “S / N ratio”) decreases as the magnetic flux not used increases. Therefore, it is not preferable.

  For these reasons, it has become a big issue how to realize a coin identification sensor that can detect a change in the magnetic field with high accuracy by forming a uniform magnetic field and can be miniaturized.

  The present invention has been made to solve the above-described problems caused by the prior art, and can detect a change in magnetic field with high accuracy by forming a uniform magnetic field and can reduce the size of the coin. An object is to provide a sensor.

  In order to solve the above-described problems and achieve the object, the present invention is a coin identification sensor for identifying a coin that passes through a detection section on a conveyance path, and a first magnetic pole member that forms a magnetic field by an excitation current; A second magnetic pole member that detects a change in the magnetic field formed in the detection section, and the first magnetic pole member is a core in which a part of the surface on the transport surface side is inclined with respect to the transport surface It includes a member and a winding wound around the core member.

  Moreover, the present invention is characterized in that, in the above-mentioned invention, a surface on the transport surface side of the core member forms a concave shape.

  The present invention is also a coin identification sensor for identifying a coin passing through a detection section on a conveyance path, the first magnetic pole member forming a magnetic field by an excitation current, and a change in the magnetic field formed in the detection section. The first magnetic pole member includes a core member and a winding wound around the core member so as to be inclined with respect to the transport surface. Features.

  The present invention is also a coin identification sensor for identifying a coin passing through a detection section on a conveyance path, the first magnetic pole member forming a magnetic field by an excitation current, and a change in the magnetic field formed in the detection section. A second magnetic pole member for detecting the first magnetic pole member, wherein the first magnetic pole member has a core member in which a part of an end surface in contact with the surface on the conveying surface side is inclined with respect to a normal to the conveying surface, and the core member And a winding wound around.

  The present invention is also a coin identification sensor for identifying a coin passing through a detection section on a conveyance path, the first magnetic pole member forming a magnetic field by an excitation current, and a change in the magnetic field formed in the detection section. A first magnetic pole member that detects a core member, a winding wound around the core member, and a conductor provided between the core member and the detection section. And a magnetic plate.

  Further, the present invention is characterized in that, in the above invention, the magnetic guide plate is provided such that a surface on a transport surface side is inclined with respect to the transport surface.

  Moreover, the present invention is characterized in that, in the above-described invention, a surface on the conveyance surface side of the magnetic guide plate forms a concave shape.

  Moreover, the present invention is characterized in that, in the above-mentioned invention, an inclination adjusting mechanism for adjusting an inclination of the magnetic guide plate according to a diameter of the coin is further provided.

  The present invention is also a coin identification sensor for identifying a coin passing through a detection section on a conveyance path, the first magnetic pole member forming a magnetic field by an excitation current, and a change in the magnetic field formed in the detection section. The first magnetic pole member is provided so as to be rotatable, and the length of the surface on the conveyance surface side that is orthogonal to the conveyance direction is changed according to the amount of rotation. And a turning mechanism for turning the core member to a predetermined position according to the diameter of the coin to be conveyed, and a winding wound around the core member.

  Moreover, the present invention is characterized in that, in the above-mentioned invention, a surface of the core member on the transport surface side at the predetermined position forms a concave shape.

  According to the present invention, the first magnetic pole member that forms a magnetic field by an excitation current and the second magnetic pole member that detects a change in the magnetic field formed in the detection section are provided, and the first magnetic pole member is a transfer surface. Since a part of the side surface includes a core member that is inclined with respect to the transport surface and a winding wound around the core member, it is possible to detect a change in the magnetic field with high accuracy by forming a uniform magnetic field. In addition, there is an effect that downsizing can be achieved.

  Further, according to the present invention, since the surface on the conveying surface side of the core member is formed in a concave shape, it is possible to suppress the spread of magnetic flux and to avoid the enlargement of the housing. There is an effect.

  In addition, according to the present invention, the first magnetic pole member that forms the magnetic field by the excitation current and the second magnetic pole member that detects the change of the magnetic field formed in the detection section, the first magnetic pole member includes: Since the core member and the winding wound around the core member so as to have an inclination with respect to the conveying surface are included, it is possible to form a uniform magnetic field in the detection section by adjusting the winding angle of the winding. The effect is that optimization can be achieved.

  In addition, according to the present invention, the first magnetic pole member that forms the magnetic field by the excitation current and the second magnetic pole member that detects the change of the magnetic field formed in the detection section, the first magnetic pole member includes: Since a part of the end surface in contact with the surface on the conveying surface side includes a core member having an inclination with respect to the normal to the conveying surface and a winding wound around the core member, the winding width of the winding is reduced. By gradually narrowing it toward the upper part of the core member, there is an effect that it is possible to optimize the formation of a uniform magnetic field in the detection section.

  In addition, according to the present invention, the first magnetic pole member that forms the magnetic field by the excitation current and the second magnetic pole member that detects the change of the magnetic field formed in the detection section, the first magnetic pole member includes: Since the core member, the winding wound around the core member, and the magnetic guide plate provided between the core member and the detection section are provided, by using the magnetic guide plate, to the end face of the magnetic pole A uniform magnetic field can be formed in the same manner as in the case of providing a predetermined inclination, thereby producing an effect that a change in the magnetic field can be detected with accuracy and downsizing can be achieved.

  Further, according to the present invention, the magnetic guide plate is provided so that the surface on the conveyance surface side is inclined with respect to the conveyance surface, so that it is uniform as in the case of providing a predetermined inclination to the end surface of the magnetic pole. A magnetic field can be formed, and thereby the magnetic field change can be detected with high accuracy and the size can be reduced.

  In addition, according to the present invention, since the surface on the conveying surface side of the magnetic guide plate is formed in a concave shape, the spread of magnetic flux can be suppressed, and the enlargement of the housing can be avoided. There is an effect.

  In addition, according to the present invention, since an inclination adjusting mechanism for adjusting the inclination of the magnetic guide plate according to the diameter of the coin is further provided, an optimum magnetic field according to the diameter of the coin can be formed. There is an effect.

  In addition, according to the present invention, the first magnetic pole member that forms the magnetic field by the excitation current and the second magnetic pole member that detects the change of the magnetic field formed in the detection section, the first magnetic pole member includes: A core member which is provided so as to be rotatable and whose length on the side of the conveyance surface orthogonal to the conveyance direction changes according to the amount of rotation, and the core member rotates to a predetermined position according to the diameter of the coin to be conveyed Since the rotation mechanism and the winding wound around the core member are provided, there is an effect that an optimum magnetic field according to the diameter of the coin can be formed with a simple mechanism.

  Further, according to the present invention, since the surface on the conveyance surface side of the core member at the predetermined position is formed in a concave shape, it is possible to suppress the spread of magnetic flux and to avoid the enlargement of the housing. There is an effect that can be.

FIG. 1 is a diagram showing an outline of a coin identification sensor according to the present invention. FIG. 2 is a diagram illustrating an arrangement example of each coil included in the coin identification sensor according to the first embodiment. FIG. 3 is a diagram illustrating a winding example of the primary coil provided in the coin identification sensor according to the modification of the first embodiment. FIG. 4 is a diagram illustrating an arrangement example of the magnetic guide plates included in the coin identification sensor according to the second embodiment. FIG. 5 is a diagram for explaining a tilt adjustment mechanism of a magnetic guide plate included in a coin identification sensor according to a modification of the second embodiment. FIG. 6 is a diagram for explaining a position adjustment mechanism for a magnetic guide plate included in a coin identification sensor according to a modification of the second embodiment. FIG. 7 is a diagram for explaining a rotation mechanism of a primary coil included in the coin identification sensor according to the third embodiment.

  Hereinafter, preferred embodiments of a coin identification sensor according to the present invention will be described in detail with reference to the accompanying drawings. In addition, as the definition of the terms below, the sum of the vertical components of the magnetic field lines per unit area is “magnetic flux”, the “magnetic flux” amount per unit area is “magnetic flux density”, and “magnetic flux density” is uniform. The magnetic field is described as “uniform magnetic field”.

  Hereinafter, a case where the magnetic pole included in the coin identification sensor is a general core coil in which a winding is wound around an iron core (core) such as ferrite will be described, and the core coil is simply referred to as “coil”. I will do it.

  First, prior to detailed description of the embodiment, an outline of a coin identification sensor according to the present invention will be described with reference to FIG. FIG. 1 is a diagram showing an outline of a coin identification sensor according to the present invention. 1A is a schematic perspective view of the coin identification sensor 1 according to the prior art or the coin identification sensor 10 according to the present invention, and FIG. 1B is a coin identification sensor according to the prior art. FIG. 1C is a schematic cross-sectional view of the coin identification sensor 10 according to the present invention cut along the XY plane.

  As shown in FIG. 1A, the coin identification sensor 1 or 10 uses a housing 11 similar to a concave shape as viewed from the Z-axis direction. Here, the housing 11 has a notch 14 having an inverted T-shape, and is provided with a conveying surface 12 and a conveying belt 13 that convey the coin 100 through the notch 14.

  Note that a section where the housing 11 and the transport surface 12 intersect with each other is a magnetic field change detection section. Further, the transport belt 13 is a member that presses the coin 100 onto the transport surface 12. Further, it is assumed that the transport direction 200 is parallel to the Z-axis direction.

  Here, the configuration and problems of the coin identification sensor 1 according to the prior art will be described with reference to FIG. As shown in FIG. 2B, the coin identification sensor 1 according to the prior art includes a primary coil 15a and secondary coils 15b and 15c each wound with a winding.

  Note that the coin 100 is transported by being shifted to one of the side walls of the transport path. For example, (B) of the figure shows an example in which the coin 100 is offset to the side wall on the secondary coil 15b side of the conveyance path.

  Here, the primary coil 15a and the secondary coils 15b and 15c are arranged at positions facing each other with the conveying surface 12 in between, and when the excitation current is applied to the primary coil 15a, the primary coil 15a, A magnetic field is formed between the secondary coils 15b and 15c (that is, the detection section). In addition, each arrow shown with the curve in (B) of the figure represents the direction of the magnetic flux in the formed magnetic field.

  However, as described above, due to the nature of the magnetic field lines that close in a loop shape, the magnetic flux spreads while adding the X-direction component, so that the magnetic field in the detection section becomes non-uniform and it is difficult to detect the magnetic field change with high accuracy. It was. The spread of the magnetic flux has a larger curvature especially at the outer edge portion of the primary coil 15a (see (B) in the figure).

  Therefore, as shown in FIG. 5B, in the coin identification sensor 1 according to the prior art, the magnetic flux in the vicinity of the outer edge portion of the primary coil 15a is set by making the width of the primary coil 15a larger than the conveyance path width w. The magnetic flux having a relatively small X-direction component passes through the coin 100.

  However, in such a case, since it is necessary to increase the size of the housing 11 together, there has been a problem that the casing of the coin identification sensor 1 itself is enlarged. Further, the S / N ratio is lowered by not using the magnetic flux in the vicinity of the outer edge of the primary coil 15a for detection of the magnetic field change.

  Therefore, in the coin identification sensor 10 according to the present invention, a “predetermined inclination” is provided at least on the end surface of the primary coil 15a, which is the side that generates magnetic flux, on the conveying surface 12 side. For example, as shown in FIG. 5C, the coin identification sensor 10 according to the present invention has a “predetermined inclination” toward the center of the end surface by making the end surface on the transport surface 12 side into an R shape. The provided primary coil 15a is provided.

  The “R shape” here refers to forming an end face with a curved surface, and includes R of a perfect circle and an ellipse.

  Here, since the end face is formed to have an R shape with a recessed central portion, it plays a role of collecting the magnetic flux in the detection section in the direction of the center line of the primary coil 15a. Therefore, although the magnetic flux will eventually expand, at least the magnetic field in the detection section can be made uniform.

  Further, since the X-direction component can be reduced also for the magnetic flux in the vicinity of the outer edge of the primary coil 15a, it is possible to avoid the case itself from becoming large like the coin identification sensor 1 according to the prior art.

  In the example shown in FIG. 5C, the case where the “predetermined inclination” is provided by making the end surface of the primary coil 15a on the conveying surface 12 side into an R shape has been described. Is not limited to the R shape. For example, it is good also as forming the recessed part of an end surface in polygonal shape.

  Moreover, it is good also as providing "predetermined inclination" in the end surface by the side of the conveyance surface 12 of the secondary coil 15b or 15c. Details of these points will be described later with reference to FIG. Moreover, it is good also as providing this "predetermined inclination" in the winding angle of the coil | winding wound around the primary coil 15a. Details of this point will be described later with reference to FIG.

  Or it is good also as performing control similar to the case where a "predetermined inclination" is provided in the end surface of the primary coil 15a by providing a magnetic-conductivity board between the conveyance surface 12 and the primary coil 15a. Details of this point will be described later with reference to FIGS.

  In addition, the primary coil 15a is formed so that the “predetermined inclination” changes depending on the cut surface, and the “predetermined inclination” is adjusted by rotating the primary coil 15a. Also good. Details of this point will be described later with reference to FIG.

  As described above, the coin identification sensor 10 according to the present invention provides a “predetermined inclination” at least on the end surface on the transport surface 12 side of the primary coil 15a, which is the side that generates magnetic flux, so that the magnetic field in the detection section is uniform. It can be. Therefore, it is possible to detect a change in the magnetic field with high accuracy and to reduce the size.

  Below, the Example of the coin identification sensor 10 which concerns on this invention demonstrated using FIG. 1 is described in detail. In Example 1, at least a case where a predetermined inclination is provided on the end face of the primary coil 15a, and in Example 2, an example in which a magnetic guide plate is provided between the transport surface 12 and the primary coil 15a. 3, the case where the inclination of the end surface of the primary coil 15a is adjusted by rotating the primary coil 15a will be described.

  FIG. 2 is a diagram illustrating an arrangement example of the coils 15 a to 15 c included in the coin identification sensor 10 according to the first embodiment. In addition, the coin identification sensor 10 which concerns on Example 1 makes the coin identification sensor 10 which concerns on this invention shown to (C) of FIG. 1 a basic form. Accordingly, in the coin identification sensor 10 according to the first embodiment, at least the “predetermined inclination” due to the R shape is provided on the end surface of the primary coil 15a on the conveyance path side.

  Moreover, each arrangement example shown to (A)-(G) of FIG. 2 further simplifies the schematic sectional drawing cut | disconnected by XY plane shown in FIG. 1, The cross section of the core of each coil 15a-15c Only the shape is shown.

  As shown in FIG. 2A, in providing a predetermined inclination to the end face of the primary coil 15a, the end face is not limited to the R shape. For example, as shown to (A) of the figure, the predetermined inclination can be comprised only by a plane. The secondary coils 15b and 15c may have a rectangular cross-sectional shape and may not have a predetermined inclination.

  Further, as shown in FIG. 2B, the shape of the end surface of the primary coil 15a that is not on the conveyance path side is not particularly limited. For example, FIG. 5B shows an example in which both the end surface on the transport path side of the primary coil 15a and the end surface that is not on the transport path side are formed in an R shape.

  Further, as shown in FIG. 5C, a predetermined inclination may be provided not only on the primary coil 15a but also on the end surfaces of the secondary coils 15b and 15c on the conveyance path side. For example, (C) of the figure shows an example in which a predetermined inclination with an R shape similar to that of the primary coil 15a is provided on the end surfaces of the secondary coils 15b and 15c on the conveyance path side.

  Moreover, as shown to (D) of the figure, it is good also as making the end surface of the primary coil 15a and the end surfaces of the secondary coils 15b and 15c into different R shape. Moreover, as shown to (E) of the figure, it is good also as making each coil 15a-15c into a different shape.

  Further, as shown in FIG. 5F, at least the end face of the primary coil 15a is provided with a predetermined inclination, and the arrangement positions of the primary coil 15a and the secondary coils 15b and 15c are brought closer to each other. It is good as well. Further, only one of the secondary coils 15b or 15c may be moved closer to the primary coil 15a as shown in FIG. In addition, (G) of the figure shows an example in which only the secondary coil 15c is brought closer.

  Thus, the coin identification sensor 10 according to the first embodiment can provide predetermined inclinations in various shapes on the end faces of the coils 15a to 15c. Also, the arrangement positions of the coils 15a to 15c can be configured in various patterns.

  Note that the shapes and arrangement positions of the end faces of the coils 15a to 15c described above are the main factors in forming a uniform magnetic field in the magnetic field change detection section. Therefore, it is preferable to adjust the shape and the arrangement position so that the X-direction component of the magnetic flux in the detection section is reduced as much as possible and the magnetic flux density becomes uniform.

  By the way, although Example 1 demonstrated the case where a predetermined inclination was provided in the end surface of each coil 15a-15c with which the coin identification sensor 10 is provided, it is not the end surface of a coil, but the coil | winding wound around each coil 15a-15c. It is good also as providing a predetermined inclination to a winding angle.

  Therefore, in the following, a modification example in which a predetermined inclination is provided to the winding angle of the winding will be described with reference to FIG. FIG. 3 is a diagram illustrating a winding example of the winding of the primary coil 16a included in the coin identification sensor 10a according to the modification of the first embodiment. Note that (A) in the figure shows a winding example in which the magnetic flux is controlled by the winding angle of the winding, and (B) in the figure shows a winding example in which the magnetic flux is controlled by the winding width of the winding. Respectively.

  As shown in FIG. 3A, the coin identification sensor 10a according to the modified example of the first embodiment includes a primary coil 16a having a wound groove (refer to a portion surrounded by a closed curved line d) on the side surface. I have. Then, the winding is wound around the primary coil 16a in such a manner that it is hung on the winding groove.

  Therefore, by winding the winding along the winding groove, it is possible to provide a predetermined inclination to the winding angle of the winding. For example, FIG. 2 shows an example in which the winding is wound so as to draw a V shape on the XY plane.

  When an excitation current is applied to the winding wound with a predetermined inclination in this way, the magnetic flux acts in a direction orthogonal to the winding angle of the winding according to Fleming's left-hand rule.

  In such a case, the magnetic flux gradually expands due to the nature of the lines of magnetic force, but the X-direction component of the magnetic flux in the detection section can be reduced by precisely adjusting the winding angle of the winding. Therefore, it is possible to form a uniform magnetic field.

  In addition, although (A) of the figure has shown the example which wound all the windings with the same winding angle, it does not need to make all the same winding angles. For example, a predetermined winding angle is provided for the winding close to the end surface on the conveyance surface side, and the winding angle is gradually set to 0 (that is, parallel to the conveyance surface) toward the other end surface. Also good.

  Further, as shown in (B) of the figure, the winding width is the upper part of the primary coil 16a with respect to the primary coil 16a having a trapezoidal cross section cut along the XY plane (see (A) of the figure). Then, the winding may be wound so as to be narrow and wide at the bottom. In such a case, since the magnetic flux can be converged toward the upper part of the primary coil 16a (see the arrow in the figure), the X-direction component of the magnetic flux in the detection section can also be reduced.

  Although only the cross-sectional shape is shown in FIG. 5B, the overall shape of the primary coil 16a may be a three-dimensional shape obtained by cutting the top of a cone or a pyramid. Further, (B) in the figure shows a case where the cross-sectional shape is a trapezoidal shape, but it is sufficient that the winding width of the winding gradually narrows toward the upper portion of the primary coil 16a. The trapezoidal inclination may be curved.

  As described above, in the first embodiment, among the coils respectively arranged at positions facing each other across the conveyance surface, at least the end surface on the conveyance surface side of the coil that is a side that generates magnetic flux is provided with a predetermined inclination. An identification sensor was constructed. In addition, the coin identification sensor is configured so as to provide a predetermined inclination to the winding angle of the winding wound around the coil that is the side that generates the magnetic flux. Therefore, the direction of the magnetic flux in the detection section can be controlled in the direction orthogonal to the transport surface, and a uniform magnetic field can be formed. Accordingly, it is possible to detect a change in the magnetic field with high accuracy and to reduce the size.

  By the way, in the first embodiment, a case where a predetermined inclination is provided at least on the end surface on the side of the conveyance surface of the coil, which is a side that generates magnetic flux, or the winding angle of the winding has been described. It is good also as performing control similar to the case where a predetermined inclination is provided. Therefore, in Example 2 described below, a case where a magnetic guide plate is provided between the conveyance surface and the coil will be described.

  FIG. 4 is a diagram illustrating an arrangement example of the magnetic guide plates included in the coin identification sensor 20 according to the second embodiment. Note that (A) in the figure shows a case where a single magnetic guide plate 50 is arranged, and (B) in the figure shows a case where a plurality of divided magnetic guide plates 51 and 52 are arranged, respectively. Show.

  As shown to (A) of the figure, the coin identification sensor 20 which concerns on Example 2 is a point provided with the magnetic guide plate 50 between the conveyance surface 12 (refer FIG. 1) and the primary coil 15a, and is Example. 1 different from the coin identification sensor 10 according to FIG.

  In addition, although the present Example 2 demonstrates the case where the primary coil 15a whose cross-sectional shape is a rectangle is used, like the coin identification sensor 10 which concerns on Example 1, the primary coil 15a which provided the predetermined | prescribed inclination to the end surface is used. It may be used.

  Here, the magnetic conducting plate 50 is a single-plate magnetic conducting material, and is disposed between the carrying surface 12 and the primary coil 15 a in parallel with the carrying surface 12. And the coin identification sensor 20 which concerns on Example 2 can add a Y direction component to magnetic flux by providing this magnetic guide plate 50. FIG. That is, it is possible to suppress the spread of the magnetic flux and to form a uniform magnetic field that is preferable for detecting a magnetic field change in the detection section.

  The magnetic guide plate 50 is preferably arranged so as not to contact the primary coil 15a. This is because, when the magnetic guide plate 50 and the primary coil 15a are brought into contact with each other, the magnetic guide plate 50 is integrated with the primary coil 15a as a magnetic pole, so that the effect of suppressing the spread of magnetic flux cannot be obtained. Although not shown, the end surface of the magnetic guide plate 50 on the conveying surface 12 side may have an R shape with a recessed central portion.

  As shown in FIG. 4B, the coin identification sensor 20 according to the second embodiment may include a plurality of divided magnetic guide plates instead of the single magnetic guide plate 50. For example, FIG. 5B shows an example in which the coin identification sensor 20 according to the second embodiment includes two divided magnetic guide plates 51 and 52.

  Here, the divided magnetic guide plates 51 and 52 are arranged between the conveyance surface 12 and the primary coil 15a, like the single magnetic plate 50, but may not be parallel to the conveyance surface 12. . For example, as shown in (B) of the figure, the divided magnetic guide plates 51 and 52 may be provided with a predetermined inclination so that the magnetic flux in the detection section has only the Y direction component as much as possible.

  In addition, although (B) of the figure shows an example in which both of the divided magnetic guide plates 51 and 52 are provided with a predetermined inclination, a predetermined inclination may be provided only on one side. Moreover, it is good also as not providing predetermined inclination in both.

  By the way, in the example shown to (B) of the same figure, the coin identification sensor 20 which concerns on Example 2 carries out the predetermined inclination of the two division | segmentation magnetic guide plates 51 and 52 between the conveyance surface 12 and the primary coil 15a. However, it is also possible to provide an inclination adjusting mechanism that adjusts the inclination according to the diameter of the coin as the subject.

  Therefore, in the following, a modification example in which the inclination of the divided magnetic guide plates 51 or 52 is adjusted according to the diameter of the coin will be described with reference to FIG. FIG. 5 is a view for explaining a tilt adjustment mechanism of a magnetic guide plate provided in the coin identification sensor 20 according to a modification of the second embodiment.

  Note that (A) in the figure shows a diagram showing the difference in relative size of coins, and (B) in the figure shows a figure in the case where the subject is a coin with a large diameter. (C) of FIG. 1 respectively shows a case where the subject is a coin with a small diameter.

  As shown in (A) of the figure, coins generally have different diameters depending on their types. Therefore, in the following, as shown in FIG. 2A, two types of coins are taken as an example, a coin having a relatively large diameter is designated as a large coin 101, and a coin having a relatively small diameter is used. Will be described as a small coin 102.

  Here, a coin identifying device including a coin identifying sensor will be described. A coin discriminating apparatus for discriminating whether a coin is genuine or not is usually provided with a plurality of sensors such as a magnetic sensor or an optical sensor in order to detect information on various objects such as the shape and design of the coin. is there.

  That is, the coin as the subject passes through the detection sections of the plurality of sensors while being transported along the transport surface 12 (see FIG. 1). A diameter sensor to be measured is included. Therefore, in the following, it is assumed that the diameter of the coin has been measured by the diameter sensor.

  As shown in FIG. 5B, when the subject transported along the transport surface 12 has been detected as the large coin 101 by the diameter sensor, the coin identification according to the modified example of the second embodiment. For example, the sensor 20 may not provide a predetermined inclination to the divided magnetic guide plates 51 and 52.

  This is because in the case of the large coin 101 having a large diameter, the area of the coin through which the magnetic flux is to pass is large, so that it is not necessary to largely correct the direction of the expanding magnetic flux toward the large coin 101. Therefore, in such a case, the magnetic plate inclination adjustment mechanism provided in the coin identification sensor 20 according to the modified example of the second embodiment holds the divided magnetic plates 51 and 52 in parallel with the transport surface 12.

  On the other hand, in the case of the small coin 102 having a small diameter, since the area of the coin through which the magnetic flux should pass is small, it is necessary to largely correct the direction of the expanding magnetic flux toward the small coin 102. Therefore, in this case, the tilt adjusting mechanism gives a predetermined tilt with respect to the conveying surface 12 to the divided magnetic guide plates 51 and 52.

  For example, as shown in (C) of the figure, when the subject has been detected by the diameter sensor to be a small coin 102, the tilt adjustment mechanism changes the tilt of the divided magnetic guide plate 51 in the direction 201. To adjust. Similarly, the inclination of the divided magnetic guide plate 52 is adjusted in the direction 202.

  Note that such adjustment of the inclination may be performed so that a uniform magnetic field is appropriately formed in the detection section. Therefore, both of the divided magnetic guide plates 51 and 52 may be adjusted simultaneously, or only one of them may be adjusted. Further, the inclination angle may be different for each of the divided magnetic guide plates 51 and 52.

  By the way, in the description using FIG. 5, the coin identification sensor 20 according to the second embodiment adjusts the predetermined inclination of the two divided magnetic guide plates 51 and 52 according to the size of the diameter of the coin as the subject. Although the case where the tilt adjusting mechanism is provided has been described, a position adjusting mechanism for adjusting the position of the divided magnetic guide plate 51 or 52 may be provided.

  Therefore, in the following, a modification example in which the position of the divided magnetic guide plate 51 or 52 is adjusted according to the diameter of the coin will be described with reference to FIG. FIG. 6 is a diagram for explaining a position adjustment mechanism of a magnetic guide plate included in the coin identification sensor 20 according to a modification of the second embodiment.

  Note that (A) in the figure shows a diagram in the case where the subject is a large coin 101 having a large diameter, and (B) in the drawing shows a diagram in which the subject is a small coin 102 having a small diameter. Respectively.

  As shown to (A) of the figure, when it has already detected that the subject conveyed along the conveyance surface 12 is the coin large 101 by the diameter sensor, the coin identification which concerns on the modification of Example 2 The sensor 20 can hold the divided magnetic guide plates 51 and 52 in a predetermined position, for example.

  This is because, in the case of the large coin 101 having a large diameter, the gap generated between the large coin 101 and the side wall of the conveyance path is small, so that the amount of magnetic flux that does not pass through the large coin 101 (that is, becomes a noise component) is relatively large. Because there are few.

  Therefore, in this case, the magnetic plate position adjustment mechanism provided in the coin identification sensor 20 according to the modification of the second embodiment holds the divided magnetic plates 51 and 52 at predetermined positions.

  On the other hand, in the case of the small coin 102 having a small diameter, since the gap generated between the small coin 102 and the side wall of the transport path is large, the amount of magnetic flux that is a noise component is relatively increased. Therefore, in this case, the same position adjusting mechanism moves the magnetic guide plates 51 and 52 to a position where the amount of magnetic flux as a noise component is reduced.

  For example, as shown in FIG. 5B, when the subject has been detected by the diameter sensor to be a small coin 102, the position adjusting mechanism moves the position of the divided magnetic guide plate 52 in the direction 203. Move to. In addition, about the division | segmentation magnetic guide plate of the side in which the clearance gap between the side walls is not produced, as shown to (B) of the figure, it can hold | maintain to a predetermined position.

  As described above, in the second embodiment, the coin identification sensor is configured to include a magnetic guide plate between the conveyance surface and the coil. In addition, the coin identification sensor is configured to include an adjustment mechanism that adjusts the inclination and position of the magnetic guide plate according to the diameter of the coin as the subject. Therefore, the magnetic field formation in the detection section can be optimized according to the size of the coin diameter. Accordingly, it is possible to detect a change in the magnetic field with high accuracy and to reduce the size.

  Incidentally, in the second embodiment, a case has been described in which the magnetic plate is provided between the conveyance surface and the coil, and the inclination and position of the magnetic plate are adjusted according to the diameter of the coin. It is good also as switching this end surface according to the magnitude | size of the diameter of a coin, after providing a several predetermined inclination to the end surface of this. Therefore, in a third embodiment described below, a case will be described in which a coil that can be switched with a predetermined inclination by rotating is provided.

  FIG. 7 is a diagram for explaining a rotation mechanism of the primary coil 17a included in the coin identification sensor 30 according to the third embodiment. 1A shows a schematic top view of the primary coil 17a seen from the positive direction of the Y axis, a schematic side view seen from the positive direction of the Z axis, and a schematic side view seen from the positive direction of the X axis. FIG.

  Also, (B) of the figure shows a diagram when the subject is a large coin 101 with a large diameter, and (C) shows a diagram when the subject is a small coin 102 with a small diameter. Respectively.

  As shown to (A) of the same figure, the primary coil 17a with which the coin identification sensor 30 which concerns on Example 3 is provided sees the end surface of R shape R1 when it sees from the positive direction of Z-axis, and the positive direction of X-axis When entangled, it has an end surface of R shape R2. Both R shapes are different.

  Moreover, as shown to (A) of the same figure, the primary coil 17a is pivotally supported by the pivot point P when it sees from the positive direction of the Y-axis, and the coin identification sensor 30 which concerns on Example 3 is A rotation mechanism that rotates the primary coil 17a in the direction of the direction 204 around the pivot point P is provided.

  Here, as shown in FIG. 5B, when the subject transported along the transport surface 12 (see FIG. 1) has been detected as the large coin 101 by the diameter sensor, 3 rotates the primary coil 17a so that the end surface of the R shape R1 is orthogonal to the transport direction (Z-axis direction) of the transport surface 12.

  In addition, as shown in FIG. 7C, when the subject transported along the transport surface 12 has been detected by the diameter sensor to be a small coin 102, the coin identification sensor according to the third embodiment. 30 rotates the primary coil 17a so that the end surface of the R shape R2 is orthogonal to the transport direction (Z-axis direction) of the transport surface 12.

  In addition, (A) of the figure shows the case where the pivot point P is the center point of the primary coil 17a, but the pivot point P is not limited to such a center point. Therefore, it is good also as providing the axial fulcrum P in the position where a uniform magnetic field is suitably formed according to the magnitude | size of a coin.

  Moreover, in the description using the same figure, although the example about the primary coil 17a which has two predetermined inclination of R shape R1 and R2 was shown, it is good also as having a predetermined inclination for every kind of coin.

  As described above, in the third embodiment, the coil having a predetermined inclination that varies depending on the rotation angle is provided, and the coil is rotated according to the size of the coin as the subject. The coin identification sensor is configured to include a rotation mechanism that adjusts a predetermined inclination with respect to the conveyance surface. Therefore, it is possible to optimize the magnetic field formation in the detection section according to the size of the coin with a simple mechanism of only rotating the coil. Accordingly, it is possible to detect a change in the magnetic field with high accuracy and to reduce the size.

  As described above, the coin identification sensor according to the present invention is useful for accurately detecting a change in the magnetic field by forming a uniform magnetic field and reducing the size, and is particularly suitable for circulation. It is suitable for application to a coin discriminating apparatus that discriminates whether or not.

DESCRIPTION OF SYMBOLS 1 Coin identification sensor 10 Coin identification sensor 10a Coin identification sensor 11 Housing 12 Conveyance surface 13 Conveyor belt 14 Notch 15a Primary coil 15b Secondary coil 15c Secondary coil 16a Primary coil 17a Primary coil 20 Coin identification sensor 30 Coin identification sensor 50 Conduction Magnetic plate 51 Divided magnetic plate 52 Divided magnetic plate 100 Coin 101 Coin large 102 Coin small

Claims (10)

A coin identification sensor for identifying a coin passing through a detection section on a conveyance path,
A first magnetic pole member that forms a magnetic field with an exciting current;
A second magnetic pole member for detecting a change in the magnetic field formed in the detection section,
The first magnetic pole member is
A core member in which a part of the surface on the conveying surface side is inclined with respect to the conveying surface;
And a coil wound around the core member.   The coin identification sensor according to claim 1, wherein a surface of the core member on the transport surface side forms a concave shape. A coin identification sensor for identifying a coin passing through a detection section on a conveyance path,
A first magnetic pole member that forms a magnetic field with an exciting current;
A second magnetic pole member for detecting a change in the magnetic field formed in the detection section,
The first magnetic pole member is
A core member;
And a coil wound around the core member so as to be inclined with respect to the transport surface. A coin identification sensor for identifying a coin passing through a detection section on a conveyance path,
A first magnetic pole member that forms a magnetic field with an exciting current;
A second magnetic pole member for detecting a change in the magnetic field formed in the detection section,
The first magnetic pole member is
A core member in which a part of the end surface in contact with the surface on the transport surface side is inclined with respect to the normal of the transport surface;
And a coil wound around the core member. A coin identification sensor for identifying a coin passing through a detection section on a conveyance path,
A first magnetic pole member that forms a magnetic field with an exciting current;
A second magnetic pole member for detecting a change in the magnetic field formed in the detection section,
The first magnetic pole member is
A core member;
A winding wound around the core member;
A coin identification sensor comprising: the core member; and a magnetic guide plate provided between the detection sections. The magnetic conducting plate is
The coin identification sensor according to claim 5, wherein a surface on the conveyance surface side is provided so as to be inclined with respect to the conveyance surface.   The coin identification sensor according to claim 6, wherein a surface on the conveyance surface side of the magnetic guide plate forms a concave shape.   The coin identification sensor according to claim 5, further comprising an inclination adjustment mechanism that adjusts an inclination of the magnetic guide plate in accordance with a diameter of the coin. A coin identification sensor for identifying a coin passing through a detection section on a conveyance path,
A first magnetic pole member that forms a magnetic field with an exciting current;
A second magnetic pole member for detecting a change in the magnetic field formed in the detection section,
The first magnetic pole member is
A core member which is provided so as to be rotatable, and the length of the surface on the conveyance surface side orthogonal to the conveyance direction according to the amount of rotation;
A turning mechanism for turning the core member to a predetermined position in accordance with the diameter of the coin to be conveyed;
A coin identification sensor comprising: a winding wound around the core member.   The coin identification sensor according to claim 9, wherein a surface of the core member on the conveyance surface side at the predetermined position forms a concave shape.

Images