JP2023058068A - Foreign matter treatment device for paper sheet - Google Patents

Abstract

To enhance stability and reliability of detection performance, and versatility, easily secure an installation space and contribute to miniaturization (thinness reduction) and simplification of the whole mechanism, and enhance stability and reliability of operation, such as making troubles and failures less likely to occur.SOLUTION: A foreign matter treatment device for a paper sheet comprises a detection treatment system C having at least: a detection space part 2 that divides a detection area A into a plurality of small areas Aa, Ab ..., with detection coil parts 3a, 3b ... wound respectively along an outline shape of small area Aa, Ab ... being arranged to face respectively the small areas Aa, Ab ...; and a foreign matter detection part 4 that sets predetermined energization times Td ... respectively for detection coil parts 3a, 3b ..., performs sequential energization control on the detection coil parts 3a, 3b ... in time series, and, based on change in a magnetic field M due to foreign matter X present in each small areas Aa, Ab ... during energization, detects the foreign matter.SELECTED DRAWING: Figure 1

Description

The present invention relates to a paper sheet foreign matter processing apparatus suitable for use in detecting foreign matter mixed in paper sheets conveyed to a predetermined detection area.

2. Description of the Related Art Conventionally, as devices of this type, a foreign object detection device disclosed in Patent Document 1 and a paper sheet handling device disclosed in Patent Document 2 are known. In the foreign matter detection device of Document 1, if a foreign matter such as a coin or clip is accidentally mixed into the bill slot, it will be taken into the device together with the bill, causing problems such as jamming of the bill and damage or failure of the device. Therefore, the purpose is to find foreign matter that has been inserted. At least a pair of first and second members arranged in a pair, wherein the first member is provided with an antenna made of copper foil to apply a voltage from a voltage applying means, and the second member is made of a conductive material A virtual capacitor is formed by grounding the virtual capacitor from the and a predetermined reference signal (reference voltage).

In addition, the paper sheet handling apparatus of Document 2 is provided with a foreign object/coin detecting means near the intake port of the bill taking mechanism of the paper sheet handling apparatus used in financial institutions such as banks. The purpose of this system is to display guidance and return foreign objects and coins to the customer when a foreign object or coin is detected. In a paper sheet handling apparatus comprising means for taking in and stacking sheets one by one and means for conveying banknotes between these means, foreign matter separating means, foreign matter detecting means, and display means are provided so that an operator can detect foreign matter. It is configured so that the operator can remove the foreign matter.

Japanese Patent Application Laid-Open No. 2008-40876 JP-A-2-81194

However, conventional devices such as the foreign object detection device and paper sheet handling device described above have the following problems.

First, since it is a dedicated device corresponding to the configuration of the paper sheet handling device, that is, it is configured in a form applied to individual transport paths of banknotes, it cannot be said that the configuration of the device is highly versatile. In addition, since it is combined with a mechanism for removing foreign matter, it is necessary to secure a space for it, which leads to an increase in the size and complexity of the entire apparatus, and the number of mechanical elements increases, so troubles and failures are likely to occur. There is a problem with the reliability of

Secondly, when detecting a foreign object (coin), it is conceivable to monitor and detect a magnetic change that can be installed in a small space. The magnitude (sensitivity) of the magnetic field fluctuates greatly depending on the position and distance of the coin, and there is a risk that detection may become impossible depending on the position and distance. was sought.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a foreign matter processing apparatus for paper sheets that solves the problems existing in the background art.

In order to solve the above-described problems, the present invention provides a paper sheet foreign matter processing apparatus 1 having a detection processing system for detecting foreign matter X mixed in a paper sheet P transported to a predetermined detection area A on a conveying path R. , the detection area A is divided into a plurality of small areas Aa, Ab . A predetermined energization time Td is set for the detection space portion 2 arranged facing Aa, Ab, and the detection coil portions 3a, 3b, and each detection coil portion 3a, 3b, On the other hand, a detection processing system C comprising at least a foreign matter detection unit 4 which sequentially controls the energization in time series and detects based on the change in the magnetic field M caused by the foreign matter X present in each of the small areas Aa, Ab, . . . It is characterized by having

In this case, according to a preferred embodiment of the invention, the paper sheets P can contain at least bills Pm, and the foreign matter X can contain at least coins Xm. The detection coil units 3a can be composed of a primary coil 12 and a secondary coil 13 wound on a single coil bobbin 11, and the foreign object detection unit 4 detects a primary coil 12 by an AC signal that energizes the primary coil 12. The existence or nonexistence of the foreign matter X can be determined from the magnitude of the amplitude D of the monitor signal 16 based on the signal 15i and the secondary signal 15e obtained from the secondary coil 13. FIG. When providing the detection space portion 2, a plurality of detection coil portions 3a may be arranged in the plane direction in the same plane facing the detection area A formed by the plane F, or It may be arranged at any position and/or at any angle facing the detection area A formed by the solid S. On the other hand, the transport path R can be provided with a function of returning the paper sheet P and the foreign matter X in the detection area A to a predetermined position Rs by reverse transfer based on the foreign matter X being detected.

According to the foreign matter processing apparatus 1 for paper sheets according to the present invention having such a configuration, the following remarkable effects can be obtained.

(1) The detection area A is divided into a plurality of small areas Aa, Ab, . Ab, . Because the detection processing system C is provided, which includes at least a foreign matter detection unit 4 that sequentially controls the energization in time series and detects based on the change in the magnetic field M caused by the foreign matter X existing in each of the small areas Aa, Ab, . . . during the energization. , the magnitude (sensitivity) of the magnetic field M can be finely averaged according to the position and distance of the foreign matter X with respect to the detection coil portions 3a, 3b, . can increase

(2) When detecting the foreign matter X, it is sufficient to dispose the detection coil portions 3a, 3b, . can contribute to As a result, troubles and failures are less likely to occur, and the stability and reliability of operation can be further enhanced.

(3) According to a preferred embodiment, if at least banknotes Pm are included in paper sheets P, it can be used for applications in which coins Xm are likely to be mixed, such as equipment provided with an insertion slot Ri for banknotes Pm. It can be implemented as the most desirable form.

(4) According to a preferred embodiment, if at least the coin Xm is included in the foreign matter X, the foreign matter is most likely to be mixed with the bill Pm as a foreign matter.

(5) According to a preferred embodiment, if the detection coil portions 3a are composed of the primary coil 12 and the secondary coil 13 wound around a single coil bobbin 11, they can be configured as a single component detection unit. efficiency, space saving, and low cost.

(6) According to a preferred embodiment, when configuring the foreign object detection unit 4, the amplitude D of the monitoring signal 16 based on the primary signal 15i by the AC signal that energizes the primary coil 12 and the secondary signal 15e obtained from the secondary coil 13 is determined. If the presence or absence of the foreign matter X is determined based on the size, the presence of the foreign matter X can be easily detected by setting a threshold value or the like. Therefore, a detection processing system C that is simple and excellent in low cost is constructed. be able to.

(7) According to a preferred embodiment, when providing the detection space portion 2, if a plurality of detection coil portions 3a are arranged in the plane direction within the same plane facing the detection area A formed by the plane F. For example, it is possible to construct the detection space 2 which is the thinnest for the flat detection area A and is excellent in manufacturability.

(8) According to a preferred embodiment, when providing the detection space section 2, the plurality of detection coil sections 3a are arranged at arbitrary positions and/or at arbitrary angles facing the detection area A formed by the solid body S. With this configuration, it can be installed in a detection area A having a geometric space with various configurations other than a flat surface, so versatility and expandability can be further enhanced.

(9) According to a preferred embodiment, a function of returning the paper sheet P and the foreign matter X in the detection area A to a predetermined stop position Rs such as an inlet by reverse transfer based on the detection of the foreign matter X in the conveying path R. If provided, the user can remove the foreign matter X, so a separate removal mechanism or the like for removing the foreign matter X becomes unnecessary, and further miniaturization and cost reduction can be enhanced.

A plan view of the main part of the foreign matter processing apparatus according to the preferred embodiment of the present invention, A plan view of a detection coil section in the same foreign matter processing apparatus, A front view including a partially extracted enlarged cross-sectional view of a coil bobbin used in a detection coil section in the same foreign matter processing apparatus, Layout of a detection coil unit according to a modified example of the same foreign matter processing apparatus, Principle configuration diagram of the detection space section and the foreign matter detection section in the same foreign matter processing apparatus, A detection circuit diagram of a foreign matter detection unit in the same foreign matter processing apparatus, A signal time chart showing signal waveforms of each part in the same detection circuit diagram, A flow chart for explaining the processing procedure of the same foreign matter processing apparatus, A perspective view of a detection space portion according to a modified example of the foreign matter processing apparatus, A perspective view of a detection space portion according to another modified example of the same foreign matter processing apparatus,

Next, preferred embodiments according to the present invention will be presented and explained in detail based on the drawings.

First, the configuration of a paper sheet foreign matter processing apparatus 1 according to the present embodiment will be specifically described with reference to FIGS. 1 to 8. FIG.

FIG. 1 is a plan view of the detection space 2 of the foreign matter processing apparatus 1, that is, a layout view as seen from the plane direction. built-in. Therefore, paper sheets P to be monitored are banknotes Pm, and main foreign substances X to be detected are coins Xm. In this manner, if at least banknotes Pm are included in the paper sheet P, it can be used for applications in which coins Xm are likely to be mixed, such as various devices provided with an insertion slot Ri for banknotes Pm. In addition, if at least the coin Xm is included in the foreign matter X, the foreign matter is most likely to be mixed with the banknote Pm, so it can be implemented as the most desirable form.

In FIG. 1, R denotes a transport path along which banknotes Pm are transported. At the rear end of transport path R with respect to the transport direction Kf, there is an insertion port (insertion port) Ri for banknotes Pm. Forward in the direction Kf has a rectangular detection area A indicated by a phantom line.

In this case, the detection area A is formed by a plane F, in the case of the example a flat plane Ff, as shown in FIG. Then, this flat surface Ff is divided into a plurality of (two in the example) small areas Aa and Ab. It should be noted that dividing does not clearly mean partitioning into a plurality of areas, but rather means dividing the space into a plurality of areas.

On the other hand, detection coil portions 3a and 3b are arranged corresponding to the respective small areas Aa and Ab. In the illustrated case, the small areas Aa and Ab are divided into two front and rear portions in the conveying direction Kf, and two detection coil portions 3a and 3b are arranged in the front and rear portions of each of the small areas Aa and Ab. In this case, as shown in FIG. 5, it is installed above the flat surface Ff at a position facing the flat surface Ff in consideration of the detectable distance Hd. In the case of illustration, this detectable distance Hd is selected to be 40 [mm] or less.

One detection coil section 3a is constructed as shown in FIGS. That is, the basic configuration has a form wound along the contour shape of the small area Aa. That is, since the small area Aa is formed in a rectangular shape, a single rectangular coil bobbin 11 shown in FIGS. . The coil bobbin 11 has a rectangular main frame portion 21f shown in FIG. 2, and four reinforcing frames 21s, 21s, . . . Further, as shown in FIG. 3, the outer peripheral surface of the main frame portion 21f is provided with a groove 21v having a V-shaped cross section formed along the circumferential direction, and the magnet wire W is wound in the groove 21v. The cross section of the groove 21v is not V-shaped with symmetry, and only one inner wall is inclined. As a result, the magnet wire W can be evenly wound without being biased to one side. Four terminal pins 22f, 22f, 22s, and 22s arranged at regular intervals are fixed to an intermediate position on one end side of the main frame portion 21f by insert molding or driving method.

The detection coil section 3a includes a primary coil 12 and a secondary coil 13 wound around a coil bobbin 11, as shown in FIG. The primary coil 12 has "42" turns and functions as a transmitter, while the secondary coil 13 has "3" turns and functions as a receiver. In this way, when configuring the detection coil section 3a, if it is composed of the primary coil 12 and the secondary coil 13 wound around a single coil bobbin 11, it can be configured as a single component detection unit. Space saving and low cost can be improved. Then, as shown in FIG. 3, the two wires Ws at both ends led out from the primary coil 12 are fixed by soldering or the like by being tied around terminal pins 22f, 22f, respectively, and connected from the secondary coil 13. The two lead-out wires Ws at both ends are fixed by soldering or the like by winding them around the terminal pins 22s, 22s, respectively.

Although the detection coil portion 3a has been described above, the basic configuration of the detection coil portion 3b can be the same as that of the detection coil portion 3a except for the size and shape. In the case of the example, since the detection coil portions 3a and 3b are the same, a plurality of detection coil portions 3a are prepared, and one is used as the detection coil portion 3a and the other is used as the detection coil portion 3b. Just do it.

Although the embodiment shown in FIG. 1 shows the case where the detection area A is divided into two small areas Aa and Ab, it can generally be divided into a plurality of small areas Aa, Ab, . . . FIG. 4 shows a case where the area is divided into four small areas Aa, Ab, Ac and Ad and four detection coil portions 3a, 3b, 3c and 3d are arranged. Thus, in general, the detection area A can be divided so as to fit the overall width and shape.

On the other hand, in FIG. 1, 4 indicates a foreign object detection section. As will be described later, the foreign object detection unit sets a predetermined energization time Td for each of the detection coils 3a and 3b, and sequentially controls the energization of each of the detection coils 3a and 3b in time series. , a function of detecting based on a change in the magnetic field M caused by the foreign matter X existing in each of the small areas Aa and Ab when the current is supplied. Therefore, the detection processing system C is composed of the detection space section 2 and the foreign object detection section 4 described above.

FIG. 6 shows a circuit diagram of a detection circuit provided in the foreign object detection section 4. As shown in FIG. It should be noted that this circuit diagram shows the principle of the circuit of the main part, and details of parts and connections are omitted. In FIG. 6, 3a and 3b denote the detection coil portions described above. The foreign object detection unit 4 includes a signal processing unit 30 , a coil driver 31 a connected between the detection coil unit 3 a and the signal processing unit 30 , and a coil driver 31 b connected between the detection coil unit 3 b and the signal processing unit 30 .

One coil driver 31a includes an NPN transistor 32 whose collector and emitter are connected to the primary coil 12, a switch section 33 connected to the base of the NPN transistor 32, a capacitor 34 connected between the collector of the NPN transistor 32 and the signal processing section 30, A capacitor 35 is connected in parallel between the terminals of the primary coil 12 and connected to the system shown in FIG. Although the configuration of one coil driver 31a has been described above, the configuration of the other coil driver 31b is similar to that of the coil driver 31a.

As a result, although the detailed processing operation will be described later, the foreign object detection unit 4 detects the amplitude D of the monitoring signal 16 based on the primary signal 15i, which is an AC signal that energizes the primary coil 12, and the secondary signal 15e obtained from the secondary coil 13. The presence or absence of foreign matter X can be determined based on the size of . With this configuration, the existence of the foreign matter X can be easily detected by setting a threshold value or the like, so there is the advantage that the detection processing system C can be constructed simply and at low cost.

Next, the processing operation of the foreign matter processing apparatus 1 according to the present embodiment will be described according to the signal time chart shown in FIG. 7 and the flow chart shown in FIG. 8 while referring to FIGS. 1 to 6.

Now, it is assumed that the foreign matter processing apparatus 1 according to the present embodiment is built in a device provided with an insertion slot Ri for banknotes Pm, and a user inserts banknotes Pm into the device.

First, as shown in FIG. 1, the user throws (inserts) banknotes Pm into the slot Ri (step S1). Note that it does not matter whether the number of banknotes Pm is one or plural. When the banknote Pm is inserted, the banknote Pm is detected by a banknote sensor (not shown), and is transported in the transport direction indicated by the arrow Kf by driving and controlling a transport mechanism (not shown) attached to the transport path R (step S2).

Then, when the bill Pm reaches a predetermined detection area A, the transport of the bill Pm is stopped (step S3). Also, when the banknote Pm reaches the detection area A, the foreign object detection unit 4 is turned on, and first, based on the monitor command signal Sa of the signal processing unit 30 shown in FIG. turns ON. As a result, the primary coil 12 of the detection coil section 3a (No. N) becomes energized by the primary signal 15s of the AC signal (step S4). The monitor command signal Sa is shown in FIG. 7(a).

When the primary coil 12 becomes energized, as shown in FIG. 5, a magnetic field M is generated in the small area Aa based on the detection coil portion 3a in the direction of the arrow Km, and the secondary coil 13 is subjected to electromagnetic induction. A secondary signal 15e based on is generated. This secondary signal 15e is fed back to the primary coil 12 side, and the coil driver 31a functions as a tuned oscillation circuit. In the illustrated case, a monitor signal 16 is generated which is an AC signal of about 100 [kHz]. Since this monitor signal 16 is applied to the signal processor 30 via the capacitor 34, the signal processor 30 monitors the magnitude of the amplitude D of the monitor signal 16 (step S5).

The monitor signal 16 is shown in FIG. 7(c). When there is no foreign object X such as a coin Xm, the magnitude of the amplitude D of the monitor signal 16 becomes like the amplitude Ds of the sinusoidal waveform indicated by the solid line. Therefore, for example, when the threshold value Js is set, the amplitude Ds is larger than the threshold value Js, so the signal processing unit 30 determines that the signal is normal. Then, when the coin Xm is not detected and the next detection coil portion 3b (No. N+1) exists, after a predetermined energization time Td has elapsed after the start of energization of the detection coil portion 3a, the detection coil Power supply to the portion 3a is stopped (steps S6, S7, S8, S9).

At the same time as the energization of the detection coil portion 3a is stopped, the energization of the detection coil portion 3b is started (step S10). That is, the switch section 33 of the coil driver 31b is turned on based on the monitor command signal Sb of the signal processing section 30, and the primary signal 15s of the AC signal flows through the primary coil 12 of the detection coil section 3b. The monitor command signal Sb is shown in FIG. 7(b). As a result, as in the case of the detection coil section 3a, a magnetic field M is generated for the small area Ab, so that the signal processing section 30 monitors the magnitude of the amplitude D of the monitor signal 16 (step S5).

Now, when the user inserts banknotes Pm into the slot Ri, as shown in FIG. assume. In this case, the amplitude D of the monitor signal 16 is affected by the magnitude of the magnetic field M due to the presence of the coin Xm, and becomes like the amplitude De of the sinusoidal waveform indicated by the dotted line in FIG. 7(c). Therefore, for example, when the threshold value Js is set, the amplitude De becomes smaller than the threshold value Js, the signal processing unit 30 determines that the coin Xm has been detected, and performs predetermined error processing (steps S11 to S16).

Specifically, based on the detection of the coin Xm, the conveying section R is reverse-transfer controlled, and an alarm such as a lamp is displayed based on the detection (steps S11 and S12). As a result, the banknotes Pm and coins Xm in the detection area A are returned to the predetermined position Rs, which is the insertion port Ri in the case of the example. ). As a result, the user can know that the coin Xm has been mixed in by means of an alarm and a necessary guide message or the like, and can remove the coin Xm according to the guide message or the like (step S15).

In this way, if the transport path R is provided with a function to return the paper sheet P and the foreign matter X in the detection area A to a predetermined stop position Rs such as an inlet by reverse transfer based on the detection of the foreign matter X, Since the user can remove the foreign matter X, there is no need for a separate removal mechanism or the like for removing the foreign matter X, and further miniaturization and cost reduction can be achieved. After removing the coin Xm, a restart key (not shown) is turned on (step S16).

This returns to the normal monitoring process (step S4). In the example, the detection coil unit 3b becomes the last detection coil unit, and since the coin Xm detected at the time of energization has been removed, the monitoring process by all the detection coil units 3a and 3b ends, and the bill Pm is conveyed to the next process (steps S5-S7).

On the other hand, FIGS. 9 and 10 show modifications of the detection space section 2. FIG. In the basic embodiment shown in FIGS. 1 to 5 described above, when providing the detection space portion 2, the plurality of detection coil portions 3a . . . It is configured by arranging Therefore, for example, the thinnest detection space part 2 with respect to the flat detection area A and excellent in manufacturability can be constructed.

On the other hand, the detection space portion 2 shown in FIGS. 9 and 10 according to the modification can be placed at an arbitrary position facing the detection area A formed by the solid body S when arranging the plurality of detection coil portions 3a. and/or arranged at any angle. In this case, in FIG. 9, the three-dimensional body S is divided into small areas Sa and Sb in the vertical direction Kv, and the detection coil section 3a is installed on the front side with respect to the small area Sa, and on the rear side with respect to the small area Sb. A detection coil portion 3b standing upright was installed. In FIG. 10, the three-dimensional body S is divided into small areas Sa and Sb in the front-back direction Kh, and the detection coil section 3a is set up in front of the small area Sa, and in the rear side of the small area Sb. An upright detection coil portion 3b was installed.

As shown in FIGS. 9 and 10, when providing the detection space section 2, the plurality of detection coil sections 3a are arranged at arbitrary positions and/or at arbitrary angles facing the detection area A formed by the solid body S. With this configuration, it can be installed in the detection area A having various configurations of geometric spaces other than a flat surface, so that versatility and expandability can be further enhanced.

Therefore, according to the foreign matter processing apparatus 1 according to this embodiment, as a basic configuration, the detection area A is divided into a plurality of small areas Aa, Ab, . A detection space portion 2 in which the detection coil portions 3a, 3b, . . . are set, and the energization of the detection coils 3a, 3b, . . . is sequentially controlled in chronological order. Since the detection processing system C having at least the foreign matter detection unit 4 for detecting the foreign matter X is provided, the magnitude (sensitivity) of the magnetic field M can be finely averaged according to the position and distance of the foreign matter X with respect to the detection coil units 3a, 3b, . Therefore, the stability and reliability of detection performance can be improved, and versatility can be improved.

In addition, when detecting the foreign matter X, it is sufficient to dispose the detection coil portions 3a, 3b, . can contribute to As a result, troubles and failures are less likely to occur, and the stability and reliability of operation can be further enhanced.

Although preferred embodiments including modified examples have been described in detail above, the present invention is not limited to such embodiments. Changes, additions, and deletions can be made arbitrarily within the scope of the gist.

For example, in the embodiment, two small areas Aa and four small areas Aa are illustrated as the plurality of small areas Aa, Ab, but the number, size, and shape of the divided small areas Aa, Ab may vary. , any number, size, and shape can be selected. Moreover, although the number of times of energizing each of the detection coil portions 3a, 3b, . . . In addition, although the case where banknotes Pm are applied as the paper sheets P is shown, other various paper sheets P such as tickets and tickets can be applied, and the case where coins Xm are applied as foreign matter X is shown. Other various types of foreign matter X can be applied. On the other hand, the detection coil units 3a are desirably composed of the primary coil 12 and the secondary coil 13 wound around a single coil bobbin 11. not excluded. Furthermore, although the foreign object detection unit 4 uses a tuned oscillation circuit, it may be configured to sequentially and selectively supply output signals of an oscillation circuit separately configured. In addition, an example of determining the presence or absence of a foreign object X based on the magnitude of the amplitude D of the monitoring signal 16 is determined using the threshold value Js. good too.

The foreign matter processing apparatus according to the present invention is used when detecting foreign matter (coins, etc.) mixed in paper sheets by being incorporated in various equipment having an insertion slot for inserting paper sheets such as banknotes. can do.

1: foreign matter processing device, 2: detection space portion, 3a: detection coil portion, 3b: detection coil portion, 4: foreign matter detection portion, 11: coil bobbin, 12: primary coil, 13: secondary coil, 15i: primary signal, 15e: secondary signal, 16: monitoring signal, R: conveying path, Rs: predetermined position, A: detection area, Aa: small area, Ab: small area, P: paper sheet, Pm: bill, X: foreign matter, Xm: coin, Td: energization time, M: magnetic field, C: detection processing system, D: amplitude, F: surface, S: solid

Claims (8)

In a paper sheet foreign matter processing apparatus having a detection processing system for detecting foreign matter mixed in paper sheets transported to a predetermined detection area by a conveying path, the detection area is divided into a plurality of small areas, and each small area is divided into a plurality of small areas. A predetermined energization time is set for a detection space portion in which each detection coil portion wound along the outline shape of the area is arranged so as to face each of the small areas, and for each detection coil portion, A detection processing system comprising at least a foreign object detection unit that sequentially controls energization of each detection coil unit in time series and detects based on a change in the magnetic field caused by a foreign object present in each small area when energized. Foreign matter processing device for paper sheets. 2. The paper sheet foreign matter processing apparatus according to claim 1, wherein said paper sheets include at least bills. 3. The paper sheet foreign matter processing apparatus according to claim 1, wherein the foreign matter includes at least a coin. 4. The paper sheet foreign matter processing apparatus according to claim 1, wherein said detection coil unit comprises a primary coil and a secondary coil wound around a single coil bobbin. The foreign matter detector determines whether or not there is a foreign matter based on the magnitude of the amplitude of a monitoring signal based on a primary signal that is an AC signal that energizes the primary coil and a secondary signal that is obtained from the secondary coil. 5. A foreign matter processing apparatus for paper sheets according to any one of items 1 to 4. 6. The detection space section is configured by arranging the plurality of detection coil sections in a planar direction within the same plane facing the detection area formed by a plane. 3. Foreign matter processing apparatus for paper sheets according to . Claim 1-5, wherein the detection space section is configured by arranging the plurality of detection coil sections at arbitrary positions and/or at arbitrary angles facing the three-dimensionally formed detection area. 3. The apparatus for processing foreign matter for paper sheets according to any one of 1. 8. The transfer path according to any one of claims 1 to 7, wherein the transfer path has a function of returning the paper sheets and the foreign matter in the detection area to a predetermined position by reverse transfer based on detection of the foreign matter. Contaminant processing equipment for paper sheets.

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