JP6112749B1 - Magnetic head for bill recognition - Google Patents

Abstract

A distance between a first magnetic gap and a second magnetic gap is reduced. A first magnetic ink which is disposed opposite to a banknote transport path 3 for transporting banknotes 2 and remains magnetized when magnetized, and a second magnetic ink which does not remain magnetized even when magnetized can be distinguished. The magnetic head 1 for banknote identification to detect at this time, The coil unwrapping core part 42 of the 1st core 4 and the coil unwrapping core part 52 of the 2nd core 5 are arrange | positioned adjacently in a banknote conveyance direction. As a result, the coil unwrapped core portions 42 and 52 of both the cores 4 and 5 are brought close to each other without being affected by the thicknesses of the magnetized coil 6 and the detection coils 7 and 8, and the first magnetic gap G1 and the second The distance L with respect to the magnetic gap G2 can be reduced. [Selection] Figure 1

Description

  The present invention relates to a bill identifying magnetic head used for identifying bill types and counterfeit bills.

  For banknote identification, which is disposed opposite to the banknote transport path for transporting banknotes and detects the first magnetic ink in which magnetism remains when magnetized and the second magnetic ink in which magnetism does not remain even if magnetized. A magnetic head is known (for example, see Patent Document 1).

  The banknote identification magnetic head 101 shown in FIG. 3 has a first core 104 having a first magnetic gap G1 facing the banknote transport path 3, a first magnetic gap G1 facing the banknote transport path 3 and in the banknote transport direction. The second core 105 having the second magnetic gap G2 disposed on the downstream side, the magnetizing coil 106 and the first detection coil 107 wound around the first core 104, and the second core 105 are wound around. A second detection coil 108.

  On the first core 104 side, the first magnetic ink and the second magnetic ink are detected by detecting the magnetic flux change by the first detection coil 107 while being magnetized by the magnetizing coil 106, and the second core 105 side Then, only the first magnetic ink is detected by detecting the change of the magnetic flux due to the residual magnetism by the second detection coil 108 without magnetizing. According to such a bill identifying magnetic head 101, since a permanent magnet is not used, there is an advantage that a dribble caused by adhesion of metal powder can be avoided.

JP 2002-202353 A

  By the way, in this kind of magnetic head 101 for banknote identification, since the 1st core 104 side and the 2nd core 105 side perform detection on the same conditions as much as possible, the 1st magnetic gap G1 in a banknote conveyance direction and 1st The distance L between the two magnetic gaps G2 is preferably as small as possible. However, as shown in FIG. 3, the first core 104 and the second core 105 include a magnetizing coil 106, a detection coil 107, Since 108 is wound, there is a limit to minimizing the distance L.

  Moreover, since this kind of magnetic head 101 for banknote identification is normally arrange | positioned in the direction orthogonal to a banknote conveyance direction and is used by the multichannel system which detects the several location of the banknote 2 simultaneously, it is orthogonal to a banknote conveyance direction. However, in the bill conveyance direction, there are cases where other types of detection devices (for example, optical sensors or image sensors that optically detect the pattern of a bill) are arranged in parallel. Since there are many, it is desired to make the dimension of a banknote conveyance direction as compact as possible.

The present invention has been created in order to solve these problems in view of the above circumstances, and the invention of claim 1 is arranged to face a banknote transport path for transporting banknotes, and is magnetized. When this is done, it is a banknote identification magnetic head that detects the first magnetic ink in which magnetism remains and the second magnetic ink in which magnetism does not remain even if magnetized, and is opposed to the banknote transport path. A first core having a magnetic gap, a second core having a second magnetic gap opposed to the banknote transport path and disposed downstream of the first magnetic gap in the banknote transport direction, and the first core A magnetizing coil to be wound and a first detection coil; and a second detection coil wound around the second core, wherein the first core has one end portion interposed through the first magnetic gap. Magnetically separated from each other There is a pair of magnetically coupled core portions, one core portion is a coil winding core portion around which the magnetizing coil and the first detection coil are wound, and the other core portion is the magnetizing portion. The coil and the detection coil are coil-unwrapped core portions that are not wound. One end portions of the second core are magnetically separated via the second magnetic gap and the other end portions are magnetically separated. It has a pair of core parts to be coupled, one core part is a coil wound core part around which the second detection coil is wound, and the other core part is a coil unwrapped around which the detection coil is not wound A core portion, and in the banknote transport direction, the coil unwrapped core portion of the first core and the coil unwrapped core portion of the second core are disposed adjacent to each other, and the first core The coil winding core part and the coil winding core part of the second core are Characterized in that it is arranged so as to sandwich the said coil non winding core portion of the said coil non winding core portion of the first core second core.
The invention according to claim 2 is the bill identifying magnetic head according to claim 1, wherein the coil unwrapped core portion of the first core includes at least the magnetized coil and the first detection coil. One side has a recess, a notch or a through hole, and the non-coiled core part of the second core has a recess, a notch or a through hole into which the second detection coil enters. To do.
Moreover, invention of Claim 3 is a magnetic head for banknote identification of Claim 1 or 2, Comprising: The said coil winding core part and the said coil non-winding core part are flat plate shape with uniform thickness. Having one end connected to each other via a flat nonmagnetic member constituting the first magnetic gap or the second magnetic gap, and the other end connected to each other via a flat high magnetic permeability member. It is characterized by that.

According to the first aspect of the present invention, since the coil unwrapped core portion of the first core and the coil unwrapped core portion of the second core are disposed adjacent to each other in the bill conveyance direction, Without being affected by the thickness of the detection coil, the coil unwrapped core portions of both cores can be arranged close to each other, and the distance between the first magnetic gap and the second magnetic gap can be reduced. This makes it possible to match the detection conditions on the first core side and the second core side as much as possible and detect the first magnetic ink and the second magnetic ink with high accuracy.
According to the invention of claim 2, the coil non-wrapping core part has a recess, a notch part or a through hole into which the magnetized coil and the detection coil enter, so the dimension in the banknote transport direction of the banknote identification magnetic head. Can be made compact.
According to the invention of claim 3, the first core and the second core are configured using a flat coil-wound core portion, a coil unwound core portion, a non-magnetic member, and a high permeability member. Therefore, the manufacturing process can be simplified and the manufacturing cost can be reduced.

It is sectional drawing of the magnetic head for banknote identification which concerns on embodiment of this invention. It is a principal part disassembled perspective view of the magnetic head for banknote identification which concerns on embodiment of this invention. It is sectional drawing of the magnetic head for banknote identification which concerns on a prior art example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2, reference numeral 1 denotes a banknote identification magnetic head. The banknote identification magnetic head 1 is disposed opposite to a banknote transport path 3 that transports a banknote 2 and remains magnetized when magnetized. The first magnetic ink to be detected and the second magnetic ink that is magnetized and does not retain magnetism are detected in a distinguishable manner. The first magnetic ink includes a plurality of types corresponding to the magnitude of the residual magnetism.

  The magnetic head 1 for banknote identification is opposed to the first core 4 having the first magnetic gap G1 facing the banknote transport path 3 and the banknote transport path 3 and on the downstream side of the first magnetic gap G1 in the banknote transport direction. The second core 5 having the second magnetic gap G2 disposed, the magnetizing coil 6 and the first detection coil 7 wound around the first core 4, and the second detection coil wound around the second core 5. 8.

  On the first core 4 side, the first magnetic ink and the second of the banknote 2 passing through the first magnetic gap G1 are detected by detecting the change of the magnetic flux with the first detection coil 7 while being magnetized with the magnetizing coil 6. Magnetic ink is detected, and on the second core 5 side, the second detection coil 8 detects a change in magnetic flux due to residual magnetism without magnetizing, so that the second of the banknote 2 passing through the second magnetic gap G2 is detected. Only one magnetic ink is detected. The magnetic ink that is detected by the first detection coil 7 and not detected by the second detection coil 8 is determined to be the second magnetic ink.

  The first core 4 has a pair of core portions 41 and 42 in which one end portions are magnetically separated via the first magnetic gap G1 and the other end portions are magnetically coupled to each other. 41 is a coil winding core part 41 around which the magnetizing coil 6 and the first detection coil 7 are wound, and the other core part 42 is a coil non-winding core part where the magnetizing coil 6 and the detection coil 7 are not wound. 42.

  In the present embodiment, the first detection coil 7 is wound around the outer periphery of the coil winding core portion 41, and the magnetizing coil 6 is wound around the outer periphery of the first detection coil 7. The magnetizing coil 6 may be wound around the outer peripheral side of the winding core portion 41, and the first detection coil 7 may be wound around the outer peripheral side of the magnetizing coil 6. Further, the magnetized coil 6 and the first detection coil 7 may be wound in series on the outer peripheral side of the coil winding core portion 41 while shifting the position in the vertical direction of FIG.

  The second core 5 has a pair of core portions 51 and 52 in which one end portions are magnetically separated via the second magnetic gap G2 and the other end portions are magnetically coupled. The core portion 51 is a coil winding core portion 51 around which the second detection coil 8 is wound, and the other core portion 52 is a coil non-winding core portion 52 around which the detection coil 8 is not wound.

  And in the banknote conveyance direction, the coil unwrapped core portion 42 of the first core 4 and the coil unwrapped core portion 52 of the second core 5 are disposed adjacent to each other, and the coil wound core of the first core 4 is disposed. The part 41 and the coil winding core part 51 of the second core 5 are arranged so as to sandwich the coil unwrapping core part 42 of the first core 4 and the coil unwrapping core part 52 of the second core 5. Yes.

  According to such an arrangement configuration, the coil unwrapped core portion 42 of the first core 4 and the coil unwrapped core portion 52 of the second core 5 are disposed adjacent to each other in the bill conveyance direction. Without being affected by the thickness of the magnetizing coil 6 and the detection coils 7 and 8, the coil unwrapped core portions 42 and 52 of both the cores 4 and 5 are arranged close to each other, and the first magnetic gap G1 and the second magnetic gap are arranged. The distance L with G2 can be reduced.

  Moreover, in this embodiment, the coil non-winding core part 42 of the 1st core 4 has the through-hole 42a which the magnetizing coil 6 and the 1st detection coil 7 enter from the direction which follows a banknote conveyance direction, and is 2nd core. The coil unwrapped core part 52 of 5 has a through hole 52a into which the second detection coil 8 enters from the direction along the bill conveyance direction.

  According to such through-holes 42a and 52a, the magnetized coil 6 and the detection coils 7 and 8 are arranged so as to overlap with the coil unwrapped core portions 42 and 52 in the banknote transport direction. The size of the magnetic head 1 in the bill conveyance direction is made compact. In addition, as long as the magnetizing coil 6 and the detection coils 7 and 8 can enter from the direction along a banknote conveyance direction, not only the through-holes 42a and 52a but a recessed part and a notch may be sufficient.

  Next, a specific configuration of the first core 4 and the second core 5 and a specific configuration of the bill identifying magnetic head 1 in which these are incorporated will be described with reference to FIGS. 1 and 2.

  The coil winding core parts 41 and 51 and the coil non-winding core parts 42 and 52 are made of a high permeability member (for example, permalloy) having a uniform thickness (flat plate shape). The magnet coil 6 and the detection coils 7 and 8 have a T-shape having a narrow portion 41a around which the coil unwinding core portions 42 and 52 are formed. It has a square shape with through-holes 42a and 52a.

  The coil winding core portions 41 and 51 and the coil non-winding core portions 42 and 52 have a flat plate-like nonmagnetic member 9 (for example, nonmagnetic) whose one ends constitute the first magnetic gap G1 or the second magnetic gap G2. The other ends are connected via a back core 10 made of a flat magnetic permeability member (for example, permalloy).

  According to the first core 4 and the second core 5 as described above, the coil winding core portions 41 and 51 having a flat plate shape, the coil non-winding core portions 42 and 52, the nonmagnetic member 9, and the back core 10 are used. Therefore, the manufacturing process can be simplified and the manufacturing cost can be reduced.

  The banknote identification magnetic head 1 includes a first core 4, a second core 5, a magnetizing coil 6, a first detection coil 7, and a second detection coil 8, and also between the first core 4 and the second core 5. And a non-magnetic member (for example, non-magnetic stainless steel) interposed between the first core 4 and the first shield plate 11 and a first shield plate 11 made of a high-permeability member (for example, permalloy) that shields magnetism. ), A second spacer 13 made of a nonmagnetic member (for example, nonmagnetic stainless steel) interposed between the second core 4 and the first shield plate 11, and the first core 4. A first holder 14 made of a nonmagnetic member to be held (for example, nonmagnetic stainless steel), a second shield plate 15 made of a high magnetic permeability member (for example, permalloy) that covers the outside of the first holder 14, and the second core 5 A non-magnetic member (for example, a non-magnetic member) A second holder 16 made of a tieless), a third shield plate 17 made of a high magnetic permeability member (for example, permalloy) covering the outside of the second holder 16, and a pair of upper and lower screws 18 for fastening them together. And a terminal block 19 that relays electrical connection with the coils 6 to 8.

  The spacers 12 and 13 and the holders 14 and 16 have through holes 12a, 13a, 14a, and 16a equivalent to the through holes 42a and 52a of the coil non-winding core portions 42 and 52, and these through holes 12a, By allowing the magnetizing coil 6 and the detection coils 7 and 8 to enter the 13a, 14a, and 16a from the direction along the banknote conveyance direction, it is possible to further reduce the size of the banknote identification magnetic head 1 in the banknote conveyance direction. Become. In addition, although the 1st holder 14 applied to the magnetic head 1 for banknote identification of 3 channels is shown in FIG. 2, the number of channels of the magnetic head 1 for banknote identification is not limited to this.

  According to the bill identifying magnetic head 1 of the present embodiment configured as described, the coil unwrapped core portion 42 of the first core 4 and the coil unwrapped core portion 52 of the second core 5 in the bill transport direction. Are arranged adjacent to each other, so that the coil unwrapped core portions 42 and 52 of both the cores 4 and 5 are arranged close to each other without being affected by the thickness of the magnetized coil 6 and the detection coils 7 and 8. The distance L between the first magnetic gap G1 and the second magnetic gap G2 can be reduced. Thereby, the detection conditions on the first core 4 side and the second core 5 side are matched as much as possible, and the first magnetic ink and the second magnetic ink can be detected with high accuracy.

  Moreover, since the coil non-wrapping core parts 42 and 52 have the through holes 42a and 52a into which the magnetizing coil 6 and the detection coils 7 and 8 enter, the dimension of the banknote identification magnetic head 1 in the banknote conveyance direction can be made compact. .

  In addition, the first core 4 and the second core 5 are configured using the flat coil-wound core portions 41 and 51, the coil non-winding core portions 42 and 52, the nonmagnetic member 9, and the back core 10. Thus, the manufacturing process can be simplified and the manufacturing cost can be reduced.

DESCRIPTION OF SYMBOLS 1 Banknote identification magnetic head 2 Banknote 3 Banknote conveyance path 4 1st core 5 2nd core 6 Magnetization coil 7 1st detection coil 8 2nd detection coil 9 Nonmagnetic member 10 Back core 41 Coil winding core part 42 Coil non- Winding core part 42a Through hole 51 Coiled core part 52 Coil unwrapped core part 52a Through hole

Claims (3)

For banknote identification, which is disposed opposite to the banknote transport path for transporting banknotes and detects the first magnetic ink in which magnetism remains when magnetized and the second magnetic ink in which magnetism does not remain even if magnetized. A magnetic head,
A first core having a first magnetic gap facing the banknote transport path;
A second core having a second magnetic gap facing the banknote transport path and disposed downstream of the first magnetic gap in the banknote transport direction;
A magnetizing coil and a first detection coil wound around the first core;
A second detection coil wound around the second core,
The first core has a pair of core portions in which one end portions are magnetically separated via the first magnetic gap and the other end portions are magnetically coupled to each other. A coil winding core portion around which the magnetizing coil and the first detection coil are wound, and the other core portion is a coil non-winding core portion where the magnetizing coil and the detection coil are not wound;
The second core has a pair of core portions in which one end portions are magnetically separated via the second magnetic gap and the other end portions are magnetically coupled to each other. The coil winding core part around which the second detection coil is wound, the other core part is a coil non-winding core part where the detection coil is not wound,
In the bill conveyance direction, the coil unwrapped core portion of the first core and the coil unwrapped core portion of the second core are disposed adjacent to each other, and the coil wound core portion of the first core. And the coil-wrapped core part of the second core are arranged so as to sandwich the coil-unwrapped core part of the first core and the coil-unwrapped core part of the second core. The magnetic head for banknote identification characterized by this. The coil unwrapped core part of the first core has a recess, a notch part or a through hole into which at least one of the magnetized coil and the first detection coil enters,
2. The bill identifying magnetic head according to claim 1, wherein the non-coiled core portion of the second core has a concave portion, a notch portion, or a through hole into which the second detection coil enters.   The coil winding core portion and the coil non-winding core portion have a flat plate shape with uniform thickness, and one end portions of the flat magnetic shape constitute the first magnetic gap or the second magnetic gap. The magnetic head for banknote identification according to claim 1, wherein the other ends are connected via a plate-shaped high magnetic permeability member.

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