JP4622694B2 - Bill recognition device - Google Patents

Description

  The present invention relates to a banknote identification device attached to a vending machine or the like, and more particularly, to a banknote identification device that prevents a paper jam from getting wet.

  In a bill recognition device attached to a vending machine or the like, after all the bills are once taken into the bill recognition device, the elements of each sensor are judged, and the judgment result does not match the predetermined data due to the wet bill Generally, the method is such that the item is returned as not being a genuine note or is escrowed when it is determined to be a genuine note. However, in such a case, when the wet banknote is returned in order to once take in all the banknotes, the banknotes are weak due to the influence of moisture, so that the paper jam easily occurs in the transport path.

In view of this, it has been proposed to dispose of moisture adhering to the inserted bill by disposing a moisture absorbing sheet in the bill identifying device (see, for example, Patent Document 1). In addition, it has also been proposed to reliably transport wet banknotes and crumpled banknotes by providing rotating means on both sides of the banknote conveyance path that contact the edges on both sides of the banknote while rotating ( For example, see Patent Document 2).
JP 2001-250143 A Japanese Patent Laid-Open No. 11-144118

  However, in the conventional banknote recognition apparatus as described above, it is not possible to detect and eliminate all the wet banknotes before taking them into the banknote identification apparatus. There is a problem that there are cases.

  This invention is made | formed in view of such a point, can remove before it takes in all the wet banknotes, and can reduce significantly that a paper jam is generated within a banknote identification device. It aims at providing a bill identification device.

In order to solve the above-mentioned problem, the present invention comprises two conductive members arranged in a mutually insulated state in a banknote transport path, and detection means for detecting impedance between the two conductive members . The conductive member is disposed below the first transport roller of the transport path in which the banknote is inserted, and the banknotes transported into the transport path when the impedance detected by the detection means is equal to or lower than a predetermined value are loaded in the direction of transport. A bill identifying device is provided that is conveyed and returned in the opposite direction.

  According to such a banknote identification device, all wet banknotes can be removed before being taken in, and the occurrence of bill jamming in the banknote identification device can be greatly reduced.

Since the banknote identification device of the present invention has two conductive members arranged below the first transport roller in the banknote transport path , the banknotes can be reliably brought into contact with the two conductive members, and the banknotes are loaded . Sometimes, the impedance between two conductive members is detected, and when the detected impedance is less than or equal to a predetermined value, the banknote carried into the transport path is transported and returned in the direction opposite to the carry-in direction. This is advantageous in that it is possible to eliminate all of the bills before taking them in, and to greatly reduce the occurrence of bill jams in the bill validator.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a main part of a banknote recognition apparatus according to an embodiment of the present invention. (A) of the same figure shows the example of arrangement | positioning of an electroconductive member, (B) has shown an example of the shape of a electroconductive member, and a detection circuit.

  This banknote identification device includes two conductive members 3a and 3b arranged in an insulated state in the conveyance path 2 of the banknote 1 and a detection circuit (detection means) 4 for detecting impedance between the two conductive members 3a and 3b. The banknote 1 carried into the conveyance path 2 is conveyed and returned in the direction opposite to the carrying-in direction when the impedance detected by the detection circuit 4 is a predetermined value or less.

  The two conductive members 3a and 3b are disposed below the first transport roller 5 (or transport belt) in the transport path 2 into which the banknote 1 is inserted. Moreover, it is a pair of conductive member formed in the shape of a comb tooth so that a linear parallel part may be mutually nested. One is connected to the detection circuit 4 and the other is connected to GND.

  The detection circuit 4 has a comparator Q1 composed of an operational amplifier, and detects its impedance from the voltage between the two conductive members 3a and 3b. Specifically, one conductive member 3a is connected to the negative input terminal (−) of the comparator Q1, and the comparison voltage divided by the resistors R1 and R2 is input to the positive input terminal (+). This comparison voltage can be determined with reference to the voltage detected when an acceptable wet bill (wet banknote 1) is actually contacted, and the allowable range of the wet bill can be set by this comparison voltage. Become. R3 and R4 are resistors.

  In the bill discriminating apparatus configured as described above, the two conductive members 3a and 3b such as metal are arranged in an insulated state in the transport path 2, and the wet bill 1 is inserted into the two conductive members 3a. , 3b, the two conductive members 3a, 3b are short-circuited. Therefore, insertion of the wet banknote 1 can be detected by monitoring the impedance between the two conductive members 3a and 3b. In the present embodiment, it is determined that the wet banknote 1 has been inserted when the impedance between the two conductive members 3a and 3b is equal to or less than a predetermined value, and is immediately returned to the insertion slot. Thereby, it can return before taking in all the wet banknotes 1. FIG.

  Conventionally, in a banknote recognition device attached to a vending machine or the like, when a banknote is inserted on a rainy day or when a banknote is inserted with a wet hand, the banknote is taken in by being wet. In some cases, banknotes are jammed inside the banknote identification device, causing bill jamming. However, in the banknote identification device according to the present embodiment, it is possible to quickly eliminate all wet banknotes at an early stage before taking in all, and it is possible to greatly reduce the occurrence of bill jamming in the banknote identification device.

  Here, in this embodiment, the position of the first transport roller 5 (or the transport belt) in the transport path 2 is such that the banknote 1 that has been wetted can be returned early as the place where the two conductive members 3a and 3b are disposed. Yes. Moreover, in order to make the banknote 1 contact the two electrically-conductive members 3a and 3b reliably, it has arrange | positioned under the conveyance roller 5 (or conveyance belt). Furthermore, the shape of the two conductive members 3a and 3b is formed in a comb-teeth shape so that a short circuit is possible even with slight contact with the wet banknote 1.

  FIG. 2 is a flowchart showing the operation of the banknote recognition apparatus of the present embodiment. Here, a bill jam prevention method of the bill validator is shown. In this bill jam prevention method, a detection step of detecting an impedance between two conductive members 3a and 3b arranged in an insulated state in the conveyance path 2 of the banknote 1, and an impedance detected in the detection step is equal to or less than a predetermined value. Sometimes it has a return step of transporting and returning the banknote 1 carried into the transport path 2 in the direction opposite to the carry-in direction.

  First, the presence or absence of insertion of the banknote 1 is monitored (S1), and when the insertion of the banknote 1 is detected, the conveyance motor (not shown) is rotated forward to start taking in the banknote 1 (S2). Then, while taking in the data of each sensor for the authenticity determination of the banknote 1, the output signal of the detection circuit 4 is monitored and it is detected whether the inserted banknote 1 is a wet bill (S3). This wet tag check is performed until the data acquisition of each sensor is completed (S4, S5). If no wet tag is detected during this time, the process proceeds to a data determination step for determining the authenticity of the banknote 1. . If a wet bill is detected during data capture, data capture is immediately stopped, the transport motor is reversed, and the banknote 1 is returned (S6).

It is a figure which shows the principal part of the banknote identification device of embodiment of this invention. It is a flowchart which shows operation | movement of the banknote identification device of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Banknote 2 Conveyance path 3a, 3b Conductive member 4 Detection circuit 5 Conveyance roller

Claims (2)

Two conductive members arranged in a state of insulation from each other on the bill conveyance path;
Detecting means for detecting an impedance between the two conductive members,
The two conductive members are disposed below the first transport roller in the transport path in which the banknote is inserted, and the banknotes carried into the transport path when the impedance detected by the detection means is equal to or lower than a predetermined value. The bill recognition device is characterized in that the bill is conveyed and returned in a direction opposite to the loading direction. 2. The banknote identification apparatus according to claim 1, wherein the two conductive members are a pair of conductive members formed in a comb shape so that linear parallel portions are nested in each other.

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