Paper sheet magnetic detection device, paper sheet identification device, paper sheet handling device, and brush roller

Abstract

A paper sheet magnetic detection device according to the present disclosure includes: a magnetic sensor that detects magnetic characteristics of a paper sheet; and a brush roller that is disposed to face a magnetic detection surface of the magnetic sensor and that conveys the paper sheet while pressing the paper sheet against the magnetic detection surface. The paper sheet magnetic detection device is characterized in that: the brush roller includes a roller body portion and a brush portion disposed on the peripheral surface of the roller body portion; and the brush portion includes a base fabric that is disposed on the peripheral surface of the roller body portion and that consists of warp yarns and weft yarns, and a plurality of piles that protrude from the base fabric and that are woven into gaps in the base fabric formed by the warp yarns and the weft yarns.

Description

Paper sheet magnetic detection device, paper sheet identification device, paper sheet processing device and brush roller

[0001] The present disclosure relates to a paper sheet magnetic detection device, a paper sheet recognition device, a paper sheet processing device, and a brush roller.

[0002] A paper sheet magnetic detection device that detects the magnetic characteristics of paper sheets generally has a structure that includes a magnetic sensor that detects the magnetic characteristics of paper sheets and a brush roller that is positioned opposite the magnetic detection surface of the magnetic sensor and rotates to transport the paper sheets while pressing them against the magnetic detection surface of the magnetic sensor.

[0003] As such a paper sheet magnetic detection device, Patent Document 1 discloses a magnetic head device for a paper sheet identification machine that uses a magnetic head provided on the transport surface of the transported paper sheets to read magnetic information and identify the paper sheets, and is characterized by comprising: a first rotating body provided in a position opposite the magnetic head across the transport surface; bristles made of an elastic material that are planted on the outer peripheral surface of the first rotating body and have a length such that their tips come into contact with the magnetic head; and a second rotating body that is provided coaxially with the first rotating body, has a diameter larger than the diameter of the first rotating body, and does not come into contact with the magnetic head.

[0004] Japanese Patent Application Publication No. 9-138877

[0005] In a conventional paper sheet magnetic detection device (magnetic head device) such as that described in Patent Document 1, pile (hair) is planted on the roller main body (first rotating body) of the brush roller, and the pile is generally planted by electrostatic planting (electrodeposition planting).

[0006] When electrostatic flocking (electrodeposition flocking) is performed, an adhesive layer is first placed on the surface of the roller body. Then, pile fibers are ejected by static electricity so that they penetrate the adhesive layer placed on the roller body. The adhesive layer is then cured to produce a brush roller with pile fibers formed on the surface of the roller body.

[0007] When electrostatic flocking (electrodeposition flocking) is used, it is difficult to uniformly control the depth to which each pile penetrates the adhesive layer, making it difficult to uniformly maintain the length of the pile protruding from the roller body. In other words, electrostatic flocking (electrodeposition flocking) presents a problem: intentionally controlling the pile length is difficult. Furthermore, if the pile length cannot be controlled intentionally, the length of the pile protruding from the roller body will vary, resulting in inconsistent quality for each brush roller. Paper sheet magnetic detection devices using brush rollers require a set clearance between the magnetic sensor and the brush funnel. However, when using brush rollers manufactured using electrostatic flocking (electrodeposition flocking) as described above, the quality of each brush roller will vary, making it impossible to set the clearance uniformly and requiring individual fine adjustments. This results in a problem of complicated setup of the clearance between the magnetic sensor and the brush funnel.

[0008] The present disclosure has been made in consideration of the above problems, and the purpose of the present disclosure is to provide a brush roller in which the pile aspects such as length, shape, angle, arrangement, etc. are intentionally controlled, a paper sheet magnetic detection device equipped with such a brush roller, a paper sheet identification device, and a paper sheet processing device.

[0009] In order to solve the above-mentioned problems and achieve the object, (1) the paper sheet magnetic detection device of the present disclosure is a paper sheet magnetic detection device having a magnetic sensor that detects the magnetic characteristics of paper sheets, and a brush roller that is arranged opposite the magnetic detection surface of the magnetic sensor and that presses paper sheets against the magnetic detection surface to transport them, wherein the brush roller has a roller main body portion and a brush portion that is arranged on the circumferential surface of the roller main body portion, and the brush portion is arranged on the circumferential surface of the roller main body portion and includes a base fabric made of warp threads and weft threads, and a plurality of piles that protrude from the base fabric and are woven into gaps in the base fabric formed by the warp threads and the weft threads.

[0010] (2) In the paper sheet magnetic detection device described in (1) above, the piles may include a first pile and a second pile of different types.

[0011] (3) In the paper sheet magnetic detection device described in (2) above, when the brush roller is viewed from the axial direction of the rotation axis, the distance L1 from the point on the first pile farthest from the rotation axis to the rotation axis may be shorter than the distance L2 from the point on the second pile farthest from the rotation axis to the rotation axis.

[0012] (4) In the paper sheet magnetic detection device described in (2) or (3) above, the first pile and the second pile may have different shapes.

[0013] (5) In the paper sheet magnetic detection device described in any one of (2) to (4) above, the first pile may have a crimped shape, and the second pile may have a straight shape.

[0014] (6) In the paper sheet magnetic detection device described in any one of (2) to (4) above, the first pile may have a straight shape, and the second pile may have a crimped shape.

[0015] (7) In the paper sheet magnetic detection device described in any one of (2) to (6) above, the first pile and the second pile may have different lengths.

[0016] (8) In the paper sheet magnetic detection device described in any of (2) to (7) above, when the brush roller is viewed from the axial direction of the rotation axis, the first pile may be arranged so as to overlap with a line passing through the root portion of the first pile and the rotation axis, and the second pile may be arranged so as to overlap with a line passing through the root portion of the second pile and the rotation axis.

[0017] (9) In the paper sheet magnetic detection device described in any of (2) to (7) above, when the brush roller is viewed from the axial direction of the rotation shaft, the first pile may be formed at an angle to a line passing through the base of the first pile and the rotation shaft.

[0018] (10) In the paper sheet magnetic detection device described in any one of (2) to (9) above, the first pile and the second pile may be regularly arranged on the base fabric.

[0019] (11) In the paper sheet magnetic detection device described in (10) above, the first pile and the second pile may be arranged regularly in the rotation direction of the brush roller.

[0020] (12) In the paper sheet magnetic detection device described in any one of (2) to (11) above, the brush section may include a first continuous pile thread having a first end and a second end opposite the first end, and a second continuous pile thread having a third end and a fourth end opposite the third end, and the first continuous pile threads may have the first end and the second end passing through gaps in the base fabrics that are different from each other and protruding from the base fabrics, thereby forming two first piles, and the second continuous pile threads may have the third end and the fourth end passing through gaps in the base fabrics that are different from each other and protruding from the base fabrics, thereby forming two second piles.

[0021] (13) In the paper sheet magnetic detection device described in (12) above, when the brush roller is viewed from the axial direction of the rotating shaft, the distance from the first end to the rotating shaft and the distance from the second end to the rotating shaft are the same distance L1', the distance from the third end to the rotating shaft and the distance from the fourth end to the rotating shaft are the same distance L2', the distance L1' is shorter than the distance L2', and the first continuous pile and the second continuous pile may be arranged in the rotation direction of the brush roller.

[0022] (14) In the paper sheet magnetic detection device described in (12) or (13) above, the first continuous pile and the second continuous pile may be arranged alternately in the rotation direction of the brush roller.

[0023] (15) A paper sheet recognition device according to the present disclosure includes the paper sheet magnetic detection device according to any one of (1) to (14) above.

[0024] (16) A paper sheet processing apparatus according to the present disclosure includes the paper sheet recognition device described in (15) above.

[0025] (17) A brush roller according to a fourth aspect of the present disclosure is a brush roller that is arranged opposite the magnetic detection surface of a magnetic sensor that detects the magnetic characteristics of paper sheets, and is used to press paper sheets against the magnetic detection surface to transport them, and the brush roller comprises a roller main body portion and a brush portion that is arranged on the circumferential surface of the roller main body portion, and the brush portion is characterized in that it includes a base fabric that is arranged on the circumferential surface of the roller main body portion and is made of warp threads and weft threads, and a plurality of piles that protrude from the base fabric and are woven into gaps in the base fabric formed by the warp threads and the weft threads.

[0026] According to the present disclosure, it is possible to provide a brush roller in which the pile aspects such as length, shape, angle, arrangement, etc. are intentionally controlled, a paper sheet magnetic detection device equipped with such a brush roller, a paper sheet identification device, and a paper sheet processing device.

[0027] FIG. 1A is a side view schematically illustrating an example of a paper sheet magnetic detection device according to the first embodiment of the present disclosure. FIG. 1B is a front view of the paper sheet magnetic detection device shown in FIG. 1A. FIG. 2A is a schematic cross-sectional view perpendicular to the rotation axis of an example of a brush roller according to the first embodiment of the present disclosure. FIG. 2B is an enlarged view of the dashed line portion in FIG. 2A. FIG. 3 is a plan view showing an expanded base fabric included in the brush roller according to the first embodiment of the present disclosure. FIG. 4A is a schematic view showing another aspect of pile weaving in the brush roller according to the first embodiment of the present disclosure. FIG. 4B is a schematic view showing another aspect of pile weaving in the brush roller according to the first embodiment of the present disclosure. FIG. 5A is a schematic view showing another aspect of continuous pile in the brush roller according to the first embodiment of the present disclosure. FIG. 5B is a schematic view showing another aspect of continuous pile in the brush roller according to the first embodiment of the present disclosure. FIG. 6A is a schematic cross-sectional view perpendicular to the rotation axis of the brush roller showing an example of a first modified example of the brush roller according to the first embodiment of the present disclosure. 6B is a schematic diagram focusing on one first pile and one second pile of the brush roller shown in FIG. 6A. FIG. 7A is a schematic diagram continuously showing the state of the brush roller during position adjustment in the paper sheet magnetic detection device according to the first embodiment of the present disclosure, in which the distance from the rotation axis of the brush roller to the tip of each pile is equal. FIG. 7B is a graph showing the relationship between the position of the brush roller and the pressure applied to the magnetic detection surface in the paper sheet magnetic detection device according to the first embodiment of the present disclosure, in which the distance from the rotation axis of the brush roller to the tip of each pile is equal. FIG. 8A is a schematic diagram continuously showing the state of the brush roller during position adjustment in the paper sheet magnetic detection device according to the first embodiment of the present disclosure, in which the distance L1 from the rotation axis of the brush roller to the tip of the first pile is shorter than the distance L2 from the rotation axis of the brush roller to the tip of the first pile. FIG. 8B is a graph showing the relationship between the position of the brush roller and the pressure applied to the magnetic detection surface in the paper sheet magnetic detection device according to the first embodiment, which includes the brush roller of Modified Example 1. FIG. 9A is a plan view schematically illustrating an example of the positions of the first pile and the second pile when the base fabric is unfolded in the first modification of the brush roller according to the first embodiment of the present disclosure. FIG.FIG. 9B is a plan view schematically showing an example of the arrangement positions of the first pile and the second pile when the base fabric is unfolded in Modification 1 of the brush roller according to Embodiment 1 of the present disclosure. FIG. 10 is a schematic diagram of a cross section perpendicular to the rotation axis of the brush roller showing an example of Modification 2 of the brush roller according to Embodiment 1 of the present disclosure. FIG. 11 is a schematic diagram of a cross section perpendicular to the rotation axis of the brush roller showing an example of Modification 3 of the brush roller according to Embodiment 1 of the present disclosure. FIG. 12 is a schematic diagram of a cross section perpendicular to the rotation axis of the brush roller showing an example of Modification 4 of the brush roller according to Embodiment 1 of the present disclosure. FIG. 13A is a schematic diagram of a cross section perpendicular to the rotation axis of the brush roller showing an example of Modification 5 of the brush roller according to Embodiment 1 of the present disclosure. FIG. 13B is an enlarged view of the dashed line portion in FIG. 13A. FIG. 14A is a cross-sectional view schematically showing an example of a paper sheet recognition device according to Embodiment 2 of the present disclosure. FIG. 14B is a plan view of the upper unit of the banknote recognition device shown in FIG. 14A, viewed from below. Fig. 15A is a perspective view schematically illustrating an example of a sheet processing apparatus according to a third embodiment of the present disclosure, Fig. 15B is a cross-sectional view schematically illustrating an example of an internal structure of the sheet processing apparatus shown in Fig. 15A.

[0028] Embodiments of a magnetic detection device, a paper sheet recognition device, and a paper sheet processing device according to the present disclosure will be described below with reference to the drawings. The present disclosure will be described below using as examples a paper sheet processing device for processing banknotes, a paper sheet recognition device built into the paper sheet processing device, and a paper sheet magnetic detection device used in the paper sheet recognition device. Note that the target of the paper sheet processing device, paper sheet recognition device, and paper sheet magnetic detection device of the present disclosure is not limited to banknotes, as long as the target is a paper sheet having magnetic characteristics. Examples of paper sheets other than banknotes include checks, gift certificates, bills, documents, securities, card-like media, etc.

[0029] (Embodiment 1) FIG. 1A is a side view schematically illustrating an example of a paper sheet magnetic detection device according to Embodiment 1 of the present disclosure. FIG. 1B is a front view of the paper sheet magnetic detection device illustrated in FIG. 1A. The paper sheet magnetic detection device 1 illustrated in FIGS. 1A and 1B includes a magnetic sensor 2 having a magnetic detection surface 2a and detecting magnetic characteristics of paper sheets, such as magnetic information or a magnetic pattern contained in a banknote, and a brush roller 50 disposed opposite the magnetic detection surface 2a of the magnetic sensor 2 and pressing the banknote against the magnetic detection surface 2a to transport the banknote. In addition, in the paper sheet magnetic detection device 1 illustrated in FIGS. 1A and 1B, the shaft 3 may be disposed at the center of the roller main body 51. Furthermore, as illustrated in FIG. 1B, in the paper sheet magnetic detection device 1, multiple brush rollers 50 may be disposed consecutively in the longitudinal direction of the shaft 3. The brush roller 50 rotates to press the banknote against the magnetic detection surface 2a and transport the banknote in a predetermined direction. The brush roller 50 is also an example of a brush roller of the present disclosure.

[0030] An example of the magnetic sensor 2 is a magnetic line sensor having a plurality of magnetic detection elements arranged in the main scanning direction. The magnetic detection elements may be those that output a signal in response to a change in the magnetic flux density of the object to be detected (differential magnetic detection elements), and specific examples include magnetoresistive elements (MR elements), fluxgate elements (FG elements), and magneto-impedance elements (MI elements).

[0031] Next, the brush roller 50 will be described in detail. FIG. 2A is a schematic diagram of a cross section perpendicular to the rotation axis of a brush roller, illustrating an example of a brush roller according to the first embodiment of the present disclosure. FIG. 2B is an enlarged view of the dashed line portion in FIG. 2A. Note that, for ease of explanation, FIG. 2A does not depict the space in which the shaft 3 is disposed (i.e., the space in which the shaft 3 is disposed is depicted as if it were filled). The brush roller 50 shown in FIG. 2A comprises a roller main body 51 and a brush portion 52 disposed on the circumferential surface of the roller main body 51. Note that in FIG. 2A, the rotation direction of the brush roller 50 is indicated by the symbol "r." Furthermore, the rotation axis around which the brush roller 50 rotates is indicated by the symbol "O." Note that, in this specification, the "rotation axis" refers to the virtual axis around which the brush roller rotates. As shown in FIG. 2B , the brush portion 52 is arranged on the peripheral surface of the roller body portion 51 and includes a base fabric 53 composed of warp threads 53 a and weft threads 53 b, and a plurality of piles 54 that protrude from the base fabric 53 and are woven into gaps S in the base fabric 53 formed by the warp threads 53 a and the weft threads 53 b.

[0032] 2B, two adjacent piles 54 may be formed by a continuous thread-like pile 55. That is, the continuous thread-like pile 55 has a first end 55e １ and the first end 55e １ The second end 55e on the opposite side ２ The continuous pile 55 has a first end 55e １ and the second end 55e ２ may pass through the gap S between different base fabrics 53 and protrude from the base fabric 53 to form two piles 54 .

[0033] In the brush roller 50, the brush portion 52 is formed by weaving the pile 54 into the base fabric 53. Therefore, the length of the pile 54 (indicated by the symbol "L" in FIG. 2B) is ５４") can be made constant. In other words, the length of the pile 54 can be intentionally controlled. Therefore, when manufacturing the brush roller 50, differences are less likely to occur between individual brush rollers, and the quality of the brush roller can be stabilized. Therefore, in the paper sheet magnetic detection device 1, simply setting it to a predetermined range makes it easy to optimize the clearance between the magnetic sensor and the brush funnel. This makes it easy to fine-tune the clearance between the magnetic sensor and the brush funnel for each brush roller. In this specification, "pile length" means the linear distance from the base of the pile protruding from the base fabric to the tip of the pile.

[0034] The form of the warp threads 53a and weft threads 53b that make up the base fabric 53 is not particularly limited, and may be a single thread, twisted threads, or the like.

[0035] The material of the warp threads 53a and the weft threads 53b may be a non-conductive fiber such as nylon, rayon, polyester, or the like.

[0036] The warp threads 53a and the weft threads 53b may be the same type of thread or different types of thread.

[0037] The form of the pile 54 is not particularly limited, but may be a single thread, twisted thread, or the like.

[0038] The material of the pile 54 may be a non-conductive fiber such as nylon, rayon, polyester, or the like.

[0039] The pile 54 may be of a single type, or may be composed of multiple piles of different types. In this specification, "different types" refers not only to differences in pile material and pile formation method (extrusion molding, spinning, etc.), but also to differences in any one aspect such as pile length, pile thickness, pile shape (described below), pile surface condition, etc.

[0040] Length L of pile 54 ５４ can be set appropriately according to the size of the brush roller 50, and may be, for example, 2 to 6 mm, 2 to 4 mm, or 4 to 6 mm.

[0041] The thickness of the pile 54 may be, for example, 0.5 to 100 D (denier), or may be 15 to 25 D (denier).

[0042] The pile 54 shown in Figures 2A and 2B has a straight shape, but the pile 54 may have a curved shape or a crimped shape. A straight shape means a linear shape that is not curved. A curved shape means an arc-shaped shape. The curvature may be constant or may vary partially. A crimped shape means a finely wavy and crimped shape.

[0043] The surface shape of the pile 54 may be smooth or may be uneven.

[0044] FIG. 3 is a plan view of the unfolded base fabric included in the brush roller according to the first embodiment of the present disclosure. The arrow r in FIG. 3 indicates the rotation direction of the brush roller 50. As shown in FIG. 3, the piles 54 are regularly arranged in the base fabric 53 included in the brush roller 50. More specifically, when the unfolded base fabric 53 is viewed in a plan view, the piles 54 may be evenly arranged so as to be located at the vertices of a rectangular grid. Such a regular arrangement of the piles 54 allows for a constant pressure when the banknotes 40 are pressed against the magnetic detection surface 2a for transport. In the brush roller according to the present disclosure, when the unfolded base fabric is viewed in a plan view, the piles may be evenly arranged so as to be located at the vertices of a square grid. Furthermore, in the brush roller according to the present disclosure, when the unfolded base fabric is viewed in a plan view, the piles may be arranged diagonally with respect to the rotation direction r. Furthermore, in the brush roller according to the present disclosure, when the unfolded base fabric is viewed in a plan view, the piles may be randomly arranged.

[0045] In the brush roller 50, the base fabric 53 may be formed by plain weave, multiple plain weave, warp staggered plain weave, hollow feather plain weave, twill weave, multiple twill weave, or the like.

[0046] In the base fabric 53 shown in Fig. 3, the continuous pile 55 is arranged along the rotation direction r, and the line connecting the tips of two piles 54 formed by one continuous pile 55 coincides with the rotation direction r. However, in the brush roller of the present disclosure, the continuous pile 55 is arranged along a direction perpendicular to the rotation direction r, and the line connecting the tips of two piles 54 formed by one continuous pile 55 may coincide with a direction perpendicular to the rotation direction r. Furthermore, the line connecting the tips of two piles 54 formed by one continuous pile 55 may be oblique to the rotation direction r.

[0047] In the brush roller 50, the density of the pile 54 formed on the base fabric 53 is 10,000 to 40,000 threads / inch. ２ may be.

[0048] In the brush roller 50, the spacing between the two nearest adjacent piles 54 may be 0.005 to 0.01 inch (0.127 to 0.254 mm).

[0049] As shown in Fig. 2B above, in the brush roller 50, the continuous pile 55 crosses one warp thread 53a so as to pass under the warp thread 53a (on the roller body 51 side), but in the brush roller of the present disclosure, the continuous pile 55 may cross two or more warp threads 53a. Such an embodiment will be described below. Figs. 4A and 4B are schematic diagrams showing another embodiment of pile weaving in the brush roller according to the first embodiment of the present disclosure.

[0050] As shown in FIG. 4A, in the brush roller 50a, the continuous pile 55 passes under the two adjacent warp threads 53a (on the roller body 51 side), and passes through the gaps S1 and S2 formed beside the warp threads 53a to the first end 55e. １ and the second end 55e ２ may protrude to form two piles 54. In the brush roller of the present disclosure, the continuous pile may pass under two or more warp threads (on the roller body 51 side) to form a pile.

[0051] As shown in Fig. 4B, in the brush roller 50b, the continuous pile 55 may be arranged so as to run above and below three warp threads 53a arranged in sequence, forming the pile 54. This embodiment will be described in more detail. In Fig. 4B, the warp threads 53a intersecting with the continuous pile 55 are arranged in the order from the left, as follows: １ , warp threads 53a ２ and warp threads 53a ３ The continuous pile 55 is formed by the warp yarns 53a. １ The lower part of the warp thread 53a ２ The upper part of the warp thread 53a ３ and the warp threads 53a １ The gap S1 on the left of the warp thread 53a ３ From the right gap S2 of １ and the second end 55e ２ The protruding portions form two piles 54. Note that in the brush roller of the present disclosure, the continuous pile may be arranged so as to alternately contact the upper and lower portions of three or more warp threads to form a pile.

[0052] As shown in Fig. 2B above, in the brush roller 50, the tip of the pile 54 and the end of the continuous pile 55 are aligned, but in the brush roller of the present disclosure, the tip of the pile may be looped. Such an embodiment will be described below. Figs. 5A and 5B are schematic diagrams showing another embodiment of the continuous pile in the brush roller according to the first embodiment of the present disclosure.

[0053] 5A, in the brush roller 50c, the continuous pile 55a may protrude from one gap in the base fabric 53 to form a loop pile 56 with a looped tip. More specifically, two root portions 57 of one loop pile 56 may protrude from the same gap S formed in the base fabric 53.

[0054] 5B, in the brush roller 50d, the continuous pile 55b may protrude from two gaps in the base fabric 53 to form loop pile 58 with looped tips. More specifically, two root portions 59a and 59b of one loop pile 58 may protrude from separate gaps S1 and S2 formed in the base fabric 53 and have looped tips.

[0055] As shown in FIG. 2B above, in the brush roller 50, the continuous pile 55 forms two piles 54. However, in the brush roller of the present disclosure, each pile may be formed independently. Such an embodiment can be achieved, for example, by arranging a single pile so that it is tied to the warp and / or weft of the base fabric. When each pile is formed independently, the piles may be arranged regularly. For example, the piles may be arranged so that each pile is located at the vertex of a rectangular or square grid. Alternatively, the piles may be arranged randomly.

[0056] In the brush roller of the present disclosure, a plurality of types of pile may be mixed, such as pile formed of continuous pile, loop pile, and pile formed solely.

[0057] A method for manufacturing the brush roller according to the first embodiment of the present disclosure includes a method in which a base fabric having pile formed thereon is placed on the circumferential surface of the roller body and fixed with an adhesive or the like.

[0058] A base fabric having piles formed thereon can be produced, for example, by the following method. First, a base fabric consisting of warp and weft yarns is prepared. Next, pile precursor yarns are sewn into the base fabric to form pile-like materials that protrude from the base fabric and have looped ends. At this time, to prevent the pile precursor yarns from fraying, the pile precursor yarns may be fixed with an adhesive or the like, or the pile precursor yarns may be fixed with reinforcing yarns. The looped portions of the pile-like material are then cut to a predetermined length to form the pile. Alternatively, the pile-like material with looped ends may be left as a loop pile without cutting. In this manner, a base fabric having piles formed thereon can be produced.

[0059] Alternatively, two base fabrics may be placed one above the other, a pile precursor yarn may be sewn into the upper and lower base fabrics in order, and the pile precursor yarn may be cut in the middle between the upper and lower base fabrics, thereby producing two base fabrics with piles formed thereon at once.

[0060] Next, a first modification of the brush roller according to the first embodiment of the present disclosure will be described. The first modification of the brush roller according to the first embodiment of the present disclosure differs from brush roller 50 in that the piles constituting the brush roller include first and second piles of different types, and when the brush roller is viewed in the axial direction of the rotation shaft, the distance L1 from the point on the first pile farthest from the rotation shaft to the rotation shaft is shorter than the distance L2 from the point on the second pile farthest from the rotation shaft to the rotation shaft.

[0061] Fig. 6A is a schematic diagram of a cross section perpendicular to the rotation axis of the brush roller, illustrating an example of Modification 1 of the brush roller according to the first embodiment of the present disclosure. For ease of explanation, Fig. 6A does not depict the space in which the shaft is disposed (i.e., the shaft is depicted as if the space is filled). The brush roller 150 shown in Fig. 6A includes a roller body 151 and a brush portion 152 disposed on the circumferential surface of the roller body 151. The brush portion 152 may include a base fabric 153 disposed on the circumferential surface of the roller body 151 and composed of warp and weft yarns, and a plurality of pile threads 154 protruding from the base fabric 153 and woven into gaps in the base fabric 153 formed by the warp and weft yarns. The pile threads 154 include first pile threads 161 and second pile threads 162 of different types.

[0062] Fig. 6B is a schematic diagram focusing on one first pile and one second pile of the brush roller shown in Fig. 6A. As shown in Fig. 6B, when the brush roller 150 is viewed from the axial direction of its rotation axis O, the first pile 161 may be arranged so as to overlap with a line α passing through a root portion 163 of the first pile 161 and the rotation axis O, and the second pile 162 may be arranged so as to overlap with a line β passing through a root portion 164 of the second pile 162 and the rotation axis O. In this specification, the lines passing through the root portions of the piles and the rotation axis are all imaginary lines. Also, in the brush roller 150 shown in Fig. 6B, the length L of the first pile 161 is１６１ is the length L of the second pile 162 １６２ Therefore, the point P on the first pile 161 that is farthest from the rotation axis O is shorter than １６１ The distance L1 from the rotation axis O to the point P on the second pile 162 that is the furthest from the rotation axis O is １６２ , which is shorter than the distance L2 to the rotation axis O.

[0063] As described above, in the paper sheet magnetic detection device 1 equipped with the brush roller 50 in which the brush portion 52 is formed by weaving the pile 54 into the base fabric 53, fine adjustment of each brush roller when setting the clearance between the magnetic sensor and the brush funnel is easy even if the distance from the rotation axis of the brush roller to the tip of each pile is equal. Furthermore, in the paper sheet magnetic detection device equipped with the brush roller 150 in which the distance L1 is shorter than the distance L2, fine adjustment of each brush roller when setting the clearance between the magnetic sensor and the brush funnel is even easier.

[0064] Before explaining why fine adjustments can be easily made for each brush roller when setting the clearance between the magnetic sensor and the brush rod in a paper sheet magnetic detection device equipped with a brush roller 150, we will explain the relationship between the position adjustment of the brush roller 50 in a paper sheet magnetic detection device 1 equipped with brush rollers 50 with a constant pile length and the pressure applied to the magnetic detection surface.

[0065] 7A is a schematic diagram showing successive states of the brush roller during position adjustment in the paper sheet magnetic detection device according to the first embodiment of the present disclosure, in which the distance from the rotation axis of the brush roller to the tip of each pile is equal. ０ 7A, the distance indicated by the symbol "d" means the distance from the rotation axis O of the brush roller 50 to the tip of the pile 54. In FIG. 7A, the distance indicated by the symbol "d" means the distance from the pile 54 to the magnetic detection surface 2a, or the distance pressed from the state where the pile 54 of the brush roller 50 is in contact with the magnetic detection surface 2a.

[0066] 7A (a) shows a state in which the pile 54 of the brush roller 50 is not in contact with the magnetic detection surface 2a in the paper sheet magnetic detection device 1. In this case, the distance from the rotation axis O of the brush roller 50 to the magnetic detection surface 2a is D ０ 7A(b) shows a state in which the pile 54 of the brush roller 50 in the paper sheet magnetic detection device 1 is in contact with the magnetic detection surface 2a. In this case, the distance from the rotation axis O of the brush roller 50 to the magnetic detection surface 2a is D ０ 7A(c) shows a state in which the pile 54 of the brush roller 50 is in contact with and pressed against the magnetic detection surface 2a in the paper sheet magnetic detection device 1. In this case, the distance from the rotation axis O of the brush roller 50 to the magnetic detection surface 2a is D ０ In the sheet magnetic detection device 1, the brush roller 50 is moved toward the magnetic detection surface 2a, and the position of the brush roller 50 is adjusted, as shown in (a) to (c) of FIG.

[0067] Here, we will explain the change in pressure applied to the magnetic detection surface when the brush roller 50 is moved in the order of (a), (b), and (c) in Fig. 7A. Fig. 7B is a graph showing the relationship between the position of the brush roller and the pressure applied to the magnetic detection surface in the paper sheet magnetic detection device according to the first embodiment of the present disclosure, in which the distance from the rotation axis of the brush roller to the tip of each pile is equal.

[0068] In Fig. 7B, the vertical axis represents the distance between the rotation axis of the brush roller and the magnetic detection surface, and the horizontal axis represents the pressure acting on the magnetic detection surface. Note that the distance between the rotation axis of the brush roller and the magnetic detection surface is the distance D in the state (b) of Fig. 7A. ０ The distances shown are relative to the reference distance.

[0069] First, when the brush roller 50 is in the position (a) of FIG. 7A, the distance between the rotation axis O of the brush roller 50 and the magnetic detection surface 2a is D. ０ +d (the region indicated by (a) in FIG. 7B), and the pile 54 and the magnetic detection surface 2a are not in contact with each other, so the pressure applied to the magnetic detection surface 2a is 0.

[0070] Next, when the brush roller is in the position (b) of FIG. 7A, the distance between the rotation axis O of the brush roller 50 and the magnetic detection surface 2a is D ０ Since the plurality of piles 54 are uniformly in contact with the magnetic detection surface 2a, the pressure applied to the magnetic detection surface 2a is P １－１ This becomes:

[0071] Next, when the brush roller 50 is in the position (c) of FIG. 7A, the distance between the rotation axis O of the brush roller 50 and the magnetic detection surface 2a is D ０ -d (area shown as (c) in Figure 7B), the pile 54 is pressed against the magnetic detection surface 2a, and the pressure on the magnetic detection surface increases rapidly as the distance between the rotation axis O of the brush roller 50 and the magnetic detection surface 2a becomes shorter.

[0072] The brush roller 50 is positioned by adjusting the distance -d. However, when adjusting the distance -d, the pressure applied to the magnetic detection surface 2a changes suddenly, which can make it difficult to adjust the position.

[0073] Next, the relationship between the position adjustment of the brush roller 150 and the pressure applied to the magnetic detection surface in the paper sheet magnetic detection device including the brush roller 150 including the first pile 161 and the second pile 162 will be described.

[0074] 8A is a schematic diagram showing successive states of the brush roller during position adjustment in the paper sheet magnetic detection device according to the first embodiment of the present disclosure, in which the distance L1 from the rotation axis of the brush roller to the tip of the first pile is shorter than the distance L2 from the rotation axis of the brush roller to the tip of the second pile. ０ The distance indicated by the symbol "d" is the distance from the rotation axis O of the brush roller 150 to the tip of the second pile 162. In FIG. 8A, the distance indicated by the symbol "d" is the distance from the second pile 162 to the magnetic detection surface 2a. １ " and "d ２ The distance indicated by " " means the distance pressed from the state where the second pile 162 of the brush roller 150 is in contact with the magnetic detection surface 2a.

[0075] 8A (a) shows a state in which the first pile 161 and the second pile 162 of the brush roller 150 are not in contact with the magnetic detection surface 2a in the paper sheet magnetic detection device 101. In this case, the distance from the rotation axis O of the brush roller 150 to the magnetic detection surface 2a is D ０ 8A(b) shows a state in which the first pile 161 of the brush roller 150 is not in contact with the magnetic detection surface 2a, and the second pile 162 is just in contact with the magnetic detection surface 2a in the paper sheet magnetic detection device 101. In this case, the distance from the rotation axis O of the brush roller 150 to the magnetic detection surface 2a is D ０ 8A(c) shows a state in which the first pile 161 of the brush roller 150 in the sheet magnetic detection device 101 is in contact with the magnetic detection surface 2a. The second pile 162 is in contact with the magnetic detection surface 2a so as to be pressed against the magnetic detection surface 2a. In this case, the distance from the rotation axis O of the brush roller 150 to the magnetic detection surface 2a is D ０ -d １ 8A (d) shows a state in which the first pile 161 and the second pile 162 of the brush roller 150 are in contact with and pressed against the magnetic detection surface 2a in the paper sheet magnetic detection device 101. In this case, the distance from the rotation axis O of the brush roller 150 to the magnetic detection surface 2a is D ０ -d ２ In the sheet magnetic detection device 101, the brush roller 150 is moved toward the magnetic detection surface 2a, and the position of the brush roller 150 is adjusted, as shown in (a) to (d) of FIG.

[0076] Here, we will explain the change in pressure applied to the magnetic detection surface when the brush roller 150 is moved in the order of (a), (b), (c), and (d) in Fig. 8A. Fig. 8B is a graph showing the relationship between the position of the brush roller and the pressure applied to the magnetic detection surface in the paper sheet magnetic detection device of embodiment 1 equipped with the brush roller of modified example 1.

[0077] In Fig. 8B, the vertical axis represents the distance between the rotation axis of the brush roller and the magnetic detection surface, and the horizontal axis represents the pressure acting on the magnetic detection surface. Note that the distance between the rotation axis of the brush roller and the magnetic detection surface is the distance D in the state (b) of Fig. 8A. ０The distances shown are relative to the reference distance.

[0078] First, when the brush roller 150 is in the position (a) of FIG. 8A, the distance between the rotation axis O of the brush roller 150 and the magnetic detection surface 2a is D. ０ +d (the region indicated by (a) in FIG. 8B), and the pile 54 and the magnetic detection surface 2a are not in contact with each other, so the pressure applied to the magnetic detection surface is 0.

[0079] Next, when the brush roller 150 is in the position (b) of FIG. 8A, the distance between the rotation axis O of the brush roller 150 and the magnetic detection surface 2a is D ０ Since the second pile 162 contacts the magnetic detection surface 2a, the pressure applied to the magnetic detection surface 2a is P ２－１ This becomes:

[0080] When the brush roller 150 is in the position shown in FIG. 8A (b), only the second pile 162 contacts the magnetic detection surface 2a. ２－１ is the pressure (i.e., P １－１ ) will be lower.

[0081] Next, when the brush roller 150 is in the position (c) of FIG. 8A, the distance between the rotation axis O of the brush roller 150 and the magnetic detection surface 2a is D ０ -d １ (region (c) in FIG. 8A), and the first pile 161 and the second pile 162 contact the magnetic detection surface 2a, so the pressure applied to the magnetic detection surface 2a is P ２－２ Distance D ０ Distance D from ０ -d １ During this time, only the second pile 162 applies pressure to the magnetic detection surface 2a, so the pressure P ２－１ Pressure P ２－２ The change so far has been gradual.

[0082] Next, when the brush roller 150 is in the position (d) of FIG. 8A, the distance between the rotation axis O of the brush roller 150 and the magnetic detection surface 2a is D ０ -d ２(region (d) in FIG. 8A), the first pile 161 and the second pile 162 come into contact with and are pressed against the magnetic detection surface 2a, so the pressure applied to the magnetic detection surface 2a increases rapidly.

[0083] The brush roller 150 is aligned as described above in -d. １ or -d ２ This is done by adjusting -d １ When adjusting the position of the magnetic sensor, the pressure on the magnetic detection surface 2a changes gradually, making it easy to adjust the position. For this reason, in the paper sheet magnetic detection device 101 equipped with the brush roller 150, it is easier to fine-tune each brush roller when setting the clearance between the magnetic sensor and the brush rotor.

[0084] Next, we will explain why the paper sheet magnetic detection device 101 equipped with the brush roller 150 can prevent a decrease in the output of the magnetic sensor while reducing the transport resistance. For example, if the pile arranged on the brush roller is of a uniform length, the pressure when the brush roller presses the banknote against the magnetic detection surface of the magnetic sensor will be uniform, but the transport resistance when the banknote is transported between the brush roller and the magnetic detection surface will tend to be high. One way to prevent this is to uniformly shorten the pile length, but in this case, the pressure pressing the banknote against the magnetic detection surface will be lower, leading to a decrease in the output of the magnetic sensor.

[0085] However, since the brush roller 150 includes the first pile 161 and the second pile 162 that are different in length, the pressure applied when the brush roller 150 presses the banknotes 40 against the magnetic detection surface 2 a of the magnetic sensor 2 is reduced, thereby reducing the transport resistance when the banknotes are transported between the brush roller and the magnetic detection surface.

[0086] One possible method for reducing conveyance resistance is to lower the pile density, but this would make the piles more likely to collapse or for banknotes to slip between the piles. However, when banknotes 40 are conveyed using the first pile 161 and the second pile 162, the first pile 161 acts as a support, preventing the second pile 162 from collapsing. It also prevents banknotes 40 from slipping between the second pile 162. For these reasons, the paper sheet magnetic detection device 101 can firmly press banknotes against the magnetic detection surface, preventing a decrease in the output of the magnetic sensor.

[0087] The distances L1 and L2 may be determined appropriately depending on the size of the paper sheet magnetic detection device 101, the size of the brush roller 150, etc. For example, the distance L1 may be approximately 17.5 mm and the distance L2 may be approximately 18.0 mm.

[0088] The first pile 161 and the second pile 162 may be regularly arranged on the base fabric 153. The first pile 161 and the second pile 162 may also be regularly arranged in the rotation direction r of the brush roller 150. Note that "the first pile and the second pile are regularly arranged in the rotation direction of the brush roller" means that N first piles and M second piles are alternately arranged in the rotation direction of the brush roller. N is a natural number greater than or equal to 1, and M is a natural number greater than or equal to 1. N and M may be the same, or N and M may be 1. For example, when N and M are 2 or greater, an area where multiple first piles are consecutively arranged and an area where multiple second piles are consecutively arranged are alternately arranged in the rotation direction of the brush roller. When N and M are 1, one first pile and one second pile are alternately arranged in the rotation direction of the brush roller. Arranging the piles in this manner prevents uneven distribution of the second piles. For example, if the second pile is unevenly distributed, the transport resistance of the banknotes when they are transported between the brush roller and the magnetic detection surface is likely to be high in that area. However, if the first pile and the second pile are regularly arranged in the rotation direction of the brush roller, the transport resistance can be reduced more evenly. Note that in the brush roller of the present disclosure, the first pile and the second pile may be randomly arranged.

[0089] Examples of the arrangement of the first pile and the second pile will be described below with reference to the drawings. Figures 9A and 9B are plan views schematically illustrating examples of the arrangement of the first pile and the second pile when the base fabric is unfolded in a first modification of the brush roller according to the first embodiment of the present disclosure.

[0090] 9A , in the brush roller 150, when the base fabric 153 is unfolded, the first piles 161 and the second piles 162 may be arranged alternately at equal intervals in the rotation direction r of the brush roller 150, the first piles 161 may be arranged in a row at equal intervals in the direction perpendicular to the rotation direction r of the brush roller 150, and the second piles 162 may be arranged in a row at equal intervals in the direction perpendicular to the rotation direction r of the brush roller 150. In other words, the rows of the first piles 161 and the rows of the second piles 162 may be arranged alternately at equal intervals in the rotation direction r of the brush roller 150. When the first piles 161 and the second piles 162 are arranged in this manner, unevenness in the pressure when pressing the banknotes 40 against the magnetic detection surface 2 a is less likely to occur.

[0091] In the brush roller of the present disclosure, the row of first piles 161 and the row of second piles 162 as shown in FIG. 9A may be arranged so as to be oblique to the rotation direction r.

[0092] In the brush roller of the present disclosure, the warp threads constituting the base fabric 153 may be formed perpendicular to the rotation direction r, parallel to the rotation direction r, or obliquely. The same applies to the weft threads constituting the base fabric 153.

[0093] 9B , when the base fabric 153 of the brush roller 150 is unfolded, the first piles 161 and the second piles 162 are alternately arranged at equal intervals in the rotation direction r of the brush roller 150, and the first piles 161 and the second piles 162 may also be alternately arranged at equal intervals in the direction perpendicular to the rotation direction r of the brush roller 150. In other words, the first piles 161 and the second piles 162 may be alternately arranged so as to be located at the vertices of a rectangular grid. Alternatively, the first piles 161 and the second piles 162 may be alternately arranged so as to be located at the vertices of a square grid. When the first piles 161 and the second piles 162 are arranged in this manner, unevenness in the pressure when pressing the banknotes 40 against the magnetic detection surface 2a is less likely to occur.

[0094] In the brush roller 150 shown in Figure 9B, the first piles 161 and the second piles 162 are arranged alternately so as to be located at the vertices of a rectangular grid, and the sides of the rectangular grid are perpendicular or parallel to the rotation direction r, but the first piles 161 and the second piles 162 may also be arranged so that the sides of the rectangular grid are diagonal to the rotation direction r.

[0095] One method for manufacturing such a brush roller 150 is to place a base fabric on which the first and second piles are formed on the circumferential surface of the roller body and fix them with an adhesive or the like. The following method, for example, can be used to form the first and second piles on the base fabric. First, a first pile precursor yarn for producing a short first pile is sewn into the base fabric, and the first pile precursor yarn is cut at a predetermined position to form the first pile. Next, a second pile precursor yarn for producing a long second pile is sewn into the base fabric, and the second pile precursor yarn is cut at a predetermined position to form the second pile. In this manner, a base fabric on which the first and second piles are formed can be manufactured.

[0096] In addition, in Modification 1 of the brush roller according to Embodiment 1 of the present disclosure, the piles constituting the brush roller include first and second piles of different types, and when the brush roller is viewed in the axial direction of the rotation shaft, the distance L1 from the point on the first pile farthest from the rotation shaft to the rotation shaft is shorter than the distance L2 from the point on the second pile farthest from the rotation shaft to the rotation shaft, so long as this is not limited to the above configuration. Below, other aspects of the brush roller according to Embodiment 1 of the present disclosure will be described.

[0097] Fig. 10 is a schematic diagram of a cross section perpendicular to the rotation axis of the brush roller, showing an example of Modification 2 of the brush roller according to the first embodiment of the present disclosure. For ease of explanation, Fig. 10 shows only one first pile and one second pile. As shown in Fig. 10, in the brush roller 150a, the first pile 161a may have a crimped shape, and the second pile 162a may have a straight shape.

[0098] When the brush roller 150a is viewed from the axial direction of its rotation axis O, the first pile 161a may be arranged so as to overlap with a line α passing through a root portion 163a of the first pile 161a and the rotation axis O, and the second pile 162a may be arranged so as to overlap with a line β passing through a root portion 164a of the second pile 162a and the rotation axis O. Furthermore, the length L of the first pile 161a may be １６１ａ is the length L of the second pile 162a １６２ａ In this case, the point P furthest from the rotation axis O on the first pile 161a may be shorter than １６１ａ The distance L1 to the rotation axis O is the point P on the second pile 162a that is the furthest from the rotation axis O. １６２ａ Therefore, it is shorter than the distance L2 to the rotation axis O.

[0099] The first pile 161a can be formed by sewing a first pile precursor yarn that has been crimped into a base fabric, and then cutting the first pile precursor yarn at a predetermined position.

[0100] Fig. 11 is a schematic diagram of a cross section perpendicular to the rotation axis of the brush roller, showing an example of Modification 3 of the brush roller according to the first embodiment of the present disclosure. As shown in Fig. 11, the brush roller 150b may have first piles 161b that are straight and second piles 162b that are crimped. Note that Fig. 11 shows only one first pile and one second pile for ease of explanation.

[0101] When the brush roller 150b is viewed from the axial direction of its rotation axis O, the first pile 161b may be arranged so as to overlap with a line α passing through a root portion 163b of the first pile 161b and the rotation axis O, and the second pile 162b may be arranged so as to overlap with a line β passing through a root portion 164b of the second pile 162b and the rotation axis O. Furthermore, the length L of the first pile 161b may be １６１ｂ is the length L of the second pile 162b １６２ｂ In this case, the point P furthest from the rotation axis O on the first pile 161b may be shorter than １６１ｂ The distance L1 to the rotation axis O is the point P on the second pile 162b that is the furthest from the rotation axis O. １６２ｂTherefore, it is shorter than the distance L2 to the rotation axis O.

[0102] The second pile 162b can be formed by sewing a second pile precursor yarn that has been crimped into a base fabric, and then cutting the second pile precursor yarn at a predetermined position.

[0103] Fig. 12 is a schematic diagram of a cross section perpendicular to the rotation axis of the brush roller, showing an example of Modification 4 of the brush roller according to Embodiment 1 of the present disclosure. For convenience of explanation, Fig. 12 shows only one first pile and one second pile.

[0104] 12, in the brush roller 150c, when the brush roller 150c is viewed from the axial direction of its rotation axis O, the first pile 161c may be formed obliquely with respect to a line α passing through a root portion 163c of the first pile 161c and the rotation axis O. Also, the second pile 162c may be arranged so as to overlap with a line β passing through a root portion 164c of the second pile 162c and the rotation axis O. The length L of the first pile 161c １６１ｃ is the length L of the second pile 162c １６２ｃ may be the same length.

[0105] 12, the length L161c of the first pile 161c is the same as the length L162c of the second pile 162c. In this case, in the brush roller 150c, the first pile 161c is formed obliquely with respect to the straight line α, so that the point P on the first pile 161c that is farthest from the rotation axis O is １６１ｃ The distance L1 to the rotation axis O is the point P on the second pile 162c that is the furthest from the rotation axis O. １６２ｃ Therefore, it is shorter than the distance L2 to the rotation axis O.

[0106] In the brush roller 150c, point P １６１ｃ When the straight line passing through the axis of rotation O is perpendicular to the conveying direction of the banknotes, the distance between the first pile 161c and the magnetic detection surface is the shortest. １６１ｃ Therefore, the length L of the first pile 161c depends on the distance L1. １６１ｃ and the length L of the second pile 162c １６２ｃEven if the lengths are the same, the distance L1 can be made shorter than the distance L2.

[0107] The distance L1 is determined by the angle formed by the straight line α and the first pile 161c and the length L １６１ｃ The desired distance can be achieved by adjusting

[0108] Even with this type of brush roller 150c, it becomes easier to fine-tune each brush roller when setting the clearance, and in addition, it is possible to reduce the resistance to transporting banknotes while preventing a decrease in the output of the magnetic sensor.

[0109] In the brush roller 150c, either one of the first pile 161c and the second pile 162c may be crimped, or both may be crimped.

[0110] In the brush roller 150c, if the distance L1 is shorter than the distance L2, the length L of the first pile 161c １６１ｃ is the length L of the second pile 162c １６２ｃ It may be shorter or longer than that.

[0111] In addition, in the brush roller 150c, the second pile 162c may be formed obliquely with respect to the straight line β, as long as the distance L1 is shorter than the distance L2.

[0112] The first pile 161c formed at an angle to the line α can be formed by sewing a first pile precursor yarn that has been set to be at an angle to the line α into the base fabric and then cutting the first pile precursor yarn at a predetermined position. The same applies to forming the second pile 162c formed at an angle to the line β.

[0113] Next, a fifth modification of the brush roller according to the first embodiment of the present disclosure and a sheet magnetic detection device including the brush roller will be described. In the fifth modification, the pile forming the brush roller includes first and second piles of different types, the brush portion forming the brush roller includes a first continuous pile thread having a first end and a second end opposite the first end, and a second continuous pile thread having a third end and a fourth end opposite the third end, and the first continuous pile thread has the first and second ends passing through gaps between different base fabrics and protruding therefrom to form two first piles, and the second continuous pile thread has the third and fourth ends passing through gaps between different base fabrics and protruding therefrom to form two second piles.

[0114] Fig. 13A is a schematic diagram of a cross section perpendicular to the rotation axis of the brush roller, showing an example of Modification 5 of the brush roller according to Embodiment 1 of the present disclosure. Fig. 13B is an enlarged view of the dashed line portion in Fig. 13A. Note that, for convenience of explanation, Figs. 13A and 13B show only one first continuous pile forming the first pile and one second continuous pile forming the second pile.

[0115] 13A and 13B includes a roller body 251 and a brush portion 252 disposed on the circumferential surface of the roller body 251. The brush portion 252 is disposed on the circumferential surface of the roller body 251 and includes a base fabric 253 formed of warp threads 253a and weft threads 253b, and a first end 265e. １ and the first end 265e １ and a second end 265e on the opposite side. ２ and a third end 266e. ３ and the third end 266e ３ and a fourth end 266e on the opposite side. ４ The first continuous pile 265 may include a second continuous pile 266 having a thread shape with a first end 265e １ and the second end 265e ２The second continuous pile 266 may pass through the gap S1 between the different base fabrics 253 and protrude from the base fabric 253 to form two first pile strands 261. ３ and the fourth end 266e ４ may pass through the gaps S2 between the different base fabrics 253 and protrude from the base fabrics 253 to form the two second piles 262.

[0116] When the brush roller 250 is viewed in the axial direction of its rotation axis O, the first end 265e １ to the rotation axis O and the second end 265e ２ The distance from the third end 266e to the rotation axis O may be the same distance L1′. ３ to the rotation axis O and the fourth end 266e ２ The distance from the center of gravity θ to the rotation axis O may be the same distance L2'. The distance L1' may be shorter than the distance L2'.

[0117] In the case of the brush roller 250, when the distance L1' is shorter than the distance L2', in a paper sheet magnetic detection device equipped with the brush roller 250, it becomes easier to fine-tune each brush roller when setting the clearance, and in addition, it is possible to prevent a decrease in the output of the magnetic sensor while reducing the conveying resistance.

[0118] In the brush roller 250, the first continuous piles 265 and the second continuous piles 266 may be arranged alternately in the rotation direction r of the brush roller 250. When the first continuous piles 265 and the second continuous piles 266 are arranged in this manner, the first piles 261 and the second piles 262 are also arranged regularly, which makes it less likely that uneven pressure will occur when pressing the banknotes against the magnetic detection surface.

[0119] As a method for producing the first pile 261 and the second pile 262, the method for producing the pile 54 in the brush roller 50 according to the first embodiment of the present disclosure can be adopted.

[0120] When the brush roller of the present disclosure includes a first pile and a second pile, the first pile and the second pile may be made of the same material or different materials. Also, the brush roller of the present disclosure may have a mixture of the various first pile and second pile configurations described above.

[0121] In the brush roller variants 1 to 5 of the present disclosure, the brush roller includes two types of pile, the first pile and the second pile, but the brush roller of the present disclosure may also include other types of pile.

[0122] In the brush rollers of the present disclosure, variations 1 to 4 focus only on the distances L1 and L2 between the first and second piles, while variations 5 focus only on the distances L1' and L2' between the first and second piles. The brush roller of the present disclosure may include a third pile constituting a distance L3 (distance L3') longer than distance L2 (distance L2'), or an nth pile constituting an even longer distance Ln (distance Ln'). In this case, the brush roller of the present disclosure may have the first pile, second pile, third pile, ..., nth pile arranged in order along the rotational direction of the brush roller. In such a brush roller, the distance from the rotational axis of the brush roller to the end of each pile gradually changes along the rotational direction of the brush roller. This configuration makes it easier to fine-tune the clearance for each brush roller.

[0123] Second Embodiment Next, a paper sheet processing apparatus according to a second embodiment including the paper sheet magnetic detection device according to the first embodiment of the present disclosure will be described.

[0124] Fig. 14A is a cross-sectional view schematically showing an example of a paper sheet recognition device according to embodiment 2 of the present disclosure. Fig. 14B is a plan view seen from below of an upper unit of the banknote recognition device shown in Fig. 14A. As shown in Figs. 14A and 14B , the paper sheet recognition device 10 according to embodiment 2 of the present disclosure may be composed of an upper unit and a lower unit sandwiching a conveyance path 32 along which banknotes 40 are conveyed. The paper sheet recognition device 10 may have a configuration in which a photosensor 11a detects banknotes 40 conveyed sequentially to the paper sheet recognition device 10 along a conveying path 32 for the banknotes 40 and generates a banknote detection signal for determining the timing for the paper sheet recognition device 10 to start detecting the banknotes 40; an optical line sensor (contact image sensor) 12 composed of an image sensor in which imaging elements such as CCD and CMOS are arranged in a line, and an imaging optical system such as a light source and a lens, and detects image data of the banknotes 40 conveyed along the conveying path 32; a thickness detection sensor 13 that detects the thickness of the banknotes 40 by detecting the amount of displacement of one of the rollers opposing each other across the conveying path 32 when the banknote 40 passes; a magnetic sensor 2 that detects magnetic characteristics of the banknotes 40, such as magnetic information and magnetic patterns contained in the banknotes 40 conveyed along the conveying path 32; and a photosensor 11b that detects the passage of the banknotes 40, all of which are arranged side by side.

[0125] The optical line sensor 12, thickness detection sensor 13, and magnetic sensor 2 are long enough relative to the width of the transport path 32 to detect the entire surface of the banknote 40. The paper sheet recognition device 10 may also be provided with a transport mechanism 14 to move the banknote 40 within the transport path 32. The transport mechanism 14 is not particularly limited, and may, for example, be one in which rollers, belts, etc. are driven by a drive device such as a motor. Furthermore, below the magnetic sensor 2, a brush roller 50 may be disposed opposite the magnetic detection surface 2a of the magnetic sensor 2 to press the banknote 40 against the magnetic detection surface 2a for transport. The mechanism for detecting the magnetism of banknotes, consisting of the magnetic sensor 2 and the brush roller 50, is the paper sheet magnetic detection device 1 according to the first embodiment of the present disclosure.

[0126] The paper sheet recognition device 10 uses data acquired by these sensors to perform recognition processing on the banknotes 40. The content of the recognition processing is not particularly limited, and in the case of banknotes, various functions such as identifying the denomination and determining whether the banknote is authentic or not may be included.

[0127] Third Embodiment Next, a paper sheet processing apparatus according to a third embodiment of the present disclosure, which includes the paper sheet recognition device according to the second embodiment of the present disclosure, will be described.

[0128] 15A is a perspective view schematically illustrating an example of a sheet processing apparatus according to a third embodiment of the present disclosure. FIG. 15B is a cross-sectional view schematically illustrating an example of the internal structure of the sheet processing apparatus shown in FIG. 15A. The sheet processing apparatus 20 shown in FIGS. 15A and 15B may include a hopper 30 capable of receiving a plurality of banknotes, a feed unit 31 that feeds out the banknotes received in the hopper 30 one by one, a transport path 32 that transports the banknotes fed from the feed unit 31, a sheet recognition device 10 that performs a banknote recognition process, a stacking unit 33 that stacks normal banknotes recognized by the sheet recognition device 10, a reject unit 34 that stacks abnormal banknotes that do not satisfy predetermined conditions, a display unit 35 that displays information input to the sheet processing apparatus 20, processing results, and the like, and a transport unit (not shown) that transports the banknotes one by one along the transport path 32. The transport unit may include a transport means such as a plurality of rollers and a drive device such as a motor that drives the transport means. The sheet processing apparatus 20 may further include transmissive or reflective optical sensors at the positions indicated by triangles in the figure to detect the state of transport of banknotes within the apparatus. The shape and skew state of the banknotes may be estimated from the detection results of these optical sensors. By incorporating the sheet recognition device 10 into such a sheet processing apparatus 20, it is possible to continuously process multiple banknotes placed in the hopper 30 and return banknotes determined to be counterfeit, damaged, or of uncertain authenticity to the reject unit 34 for sorting. The sheet recognition device that performs the banknote recognition process is the sheet recognition device 10 according to the second embodiment of the present disclosure.

[0129] (Other embodiments) When the brush roller of the present disclosure includes multiple types of piles, the distance from the point on each pile farthest from the rotation axis to the rotation axis may be equal when viewed from the axial direction of the rotation axis. For example, when the brush roller of the present disclosure includes long piles and short piles, the long piles may be formed at an angle with respect to a line passing through the base of the long piles and the rotation axis when viewed from the axial direction of the rotation axis, so that the distance from the point on each pile farthest from the rotation axis to the rotation axis may be equal when viewed from the axial direction of the rotation axis.

[0130] As shown in FIGS. 1A and 1B , in the paper sheet magnetic detection device according to the first embodiment of the present disclosure, multiple brush rollers 50 are arranged consecutively along the longitudinal direction of the shaft 3. Focusing on each individual brush roller 50, as shown in FIGS. 2A and 2B , the roller body is cylindrical and has a uniform outer diameter. However, in the brush roller according to the present disclosure, when focusing on a single brush roller, multiple cylindrical units with different outer diameters may be arranged along the longitudinal direction of the shaft to form a single roller body. That is, the roller body may have a stepped outer diameter along the longitudinal direction of the shaft. Furthermore, the units may be integrally molded to form the roller body. Even if the roller body has a stepped outer diameter along the longitudinal direction of the shaft, the brush roller according to the present disclosure allows for intentional control of aspects such as pile length, shape, angle, and arrangement, thereby ensuring consistent quality for each brush roller. From the perspective of manufacturing costs, a brush roller with a cylindrical roller body with a uniform outer diameter is more advantageous than a brush roller with a stepped outer diameter.

[0131] As described above, the present disclosure provides a technique useful for intentionally controlling the length, shape, angle, arrangement, and other aspects of the pile formed on a brush roller that constitutes a paper sheet processing apparatus.

Claims

1. A paper sheet magnetic detection device having a magnetic sensor that detects the magnetic characteristics of paper sheets, and a brush roller that is arranged facing the magnetic detection surface of the magnetic sensor and presses paper sheets against the magnetic detection surface to transport them, wherein the brush roller has a roller main body and a brush portion arranged on the circumferential surface of the roller main body, and the brush portion is arranged on the circumferential surface of the roller main body and includes a base fabric composed of warp threads and weft threads, and a plurality of piles that protrude from the base fabric and are woven into gaps in the base fabric formed by the warp threads and the weft threads.

2. The paper magnetic detection device according to claim 1, wherein the piles include a first pile and a second pile of different types.

3. A paper sheet magnetic detection device as described in claim 2, wherein, when the brush roller is viewed in the axial direction of the rotation shaft, a distance L1 from the point on the first pile farthest from the rotation shaft to the rotation shaft is shorter than a distance L2 from the point on the second pile farthest from the rotation shaft to the rotation shaft.

4. The paper magnetic detection device according to claim 2 or 3, wherein the first pile and the second pile have mutually different shapes.

5. A paper sheet magnetic detection device according to any one of claims 2 to 4, wherein the first pile has a curled shape, and the second pile has a straight shape.

6. A paper sheet magnetic detection device according to any one of claims 2 to 4, wherein the first pile has a straight shape, and the second pile has a crimped shape.

7. The paper magnetic detection device according to any one of claims 2 to 6, wherein the first pile and the second pile have mutually different lengths.

8. A paper sheet magnetic detection device as described in any one of claims 2 to 7, wherein, when the brush roller is viewed in the axial direction of the rotation shaft, the first pile is arranged so as to overlap with a line passing through the base of the first pile and the rotation shaft, and the second pile is arranged so as to overlap with a line passing through the base of the second pile and the rotation shaft.

9. A paper sheet magnetic detection device as described in any one of claims 2 to 7, wherein, when the brush roller is viewed from the axial direction of the rotation shaft, the first pile is formed at an angle with respect to a line passing through the base portion of the first pile and the rotation shaft.

10. A paper sheet magnetic detection device according to any one of claims 2 to 9, wherein the first pile and the second pile are regularly arranged on the base fabric.

11. The paper magnetic detection device according to claim 10, wherein the first pile and the second pile are regularly arranged in the rotation direction of the brush roller.

12. A paper sheet magnetic detection device as described in any of claims 2 to 11, wherein the brush portion includes a first continuous pile thread having a first end and a second end opposite the first end, and a second continuous pile thread having a third end and a fourth end opposite the third end, the first continuous pile threads having the first end and the second end passing through gaps in the different base fabrics and protruding from the base fabric to form two first pile threads, and the second continuous pile threads having the third end and the fourth end passing through gaps in the different base fabrics and protruding from the base fabric to form two second pile threads.

13. A paper sheet magnetic detection device as described in claim 12, wherein, when the brush roller is viewed from the axial direction of the rotating shaft, the distance from the first end to the rotating shaft and the distance from the second end to the rotating shaft are the same distance L1', the distance from the third end to the rotating shaft and the distance from the fourth end to the rotating shaft are the same distance L2', the distance L1' is shorter than the distance L2', and the first continuous pile and the second continuous pile are arranged in the rotational direction of the brush roller.

14. The paper sheet magnetic detection device according to claim 12 or 13, wherein the first continuous pile and the second continuous pile are arranged alternately in the rotation direction of the brush roller.

15. A paper sheet identification device comprising the paper sheet magnetic detection device according to any one of claims 1 to 14.

16. A paper processing device equipped with the paper recognition device according to claim 15.

17. A brush roller arranged opposite the magnetic detection surface of a magnetic sensor that detects the magnetic characteristics of paper sheets, and used to press paper sheets against the magnetic detection surface to transport them, the brush roller comprising a roller main body and a brush portion arranged on the circumferential surface of the roller main body, the brush portion being arranged on the circumferential surface of the roller main body and including a base fabric composed of warp threads and weft threads, and a plurality of piles protruding from the base fabric and woven into gaps in the base fabric formed by the warp threads and the weft threads.

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