JPH04251055A - Paper conveying device - Google Patents

Abstract

PURPOSE:To detect not only a paper having thickness higher than a reference but also a paper having thickness lower than the reference. CONSTITUTION:A paper conveying device to convey papers 5 comprises a magnetic sensor 2 located in a manner that it can approach and part from a fixed magnet 4 and feeding an output voltage responding to a distance between the magnet 4 and the magnetic sensor, a drive mechanism 1 causing the magnetic sensor 2 to relatively approach and part in response to the thickness of the paper 5 to be conveyed, the one comparing circuit 6 to compare an output voltage from the magnetic sensor 2 with the one reference voltage (a thick note reference voltage), and the other comparing circuit 3 to compare an output voltage from the magnetic sensor 2 with the other reference voltage (a thin note reference voltage).

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a paper sheet conveying device.
In particular, the present invention relates to a paper sheet conveying device having a function of detecting the thickness of paper sheets.

0002

[Prior Art] A conventional paper sheet conveying device has a circuit that compares the thickness detection voltage of paper sheets with a reference voltage which is a thick paper reference voltage, and only detects paper sheets that are thicker than the reference voltage. There is something that detects Detection in this conventional device involves, for example, displacing the mechanism section in accordance with the thickness of the paper sheet being conveyed, and using this displacement to change the distance between the magnetic sensor and the magnet, the magnetic sensor output ( A comparator circuit compares the thickness detection voltage) and a thick paper reference voltage to detect paper sheets that are thicker than the reference voltage.

0003

[Problems to be Solved by the Invention] However, in this conventional paper sheet conveying device, since the thickness detection voltage of the paper sheet is only compared with the thick paper reference voltage for detecting thick paper sheets, Although it is possible to detect paper sheets that are thicker than the standard, there is a problem in that it is impossible to detect paper sheets that are thinner than the standard.

The present invention has been made in view of the above-mentioned problems, and provides a paper sheet conveying device which is capable of detecting not only paper sheets thicker than the reference, but also paper sheets thinner than the reference. For the purpose of providing.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the paper sheet conveying device of the present invention provides a paper sheet conveying device for conveying paper sheets, in which a fixed magnet is relatively close to and separated from a fixed magnet. a magnetic sensor that is provided so as to send an output voltage that corresponds to the distance between the magnetic sensor and the magnet; a drive mechanism that moves the magnetic sensor relatively close to each other in accordance with the thickness of the paper sheet to be conveyed; The configuration includes one comparison circuit that compares the output voltage from the magnetic sensor and one reference voltage, and another comparison circuit that compares the output voltage from the magnetic sensor and another reference voltage.

[0006]

[Function] According to the paper sheet conveying device having the above configuration, if one reference voltage is set as the thick paper reference voltage and the other reference voltage is set as the thin paper reference voltage, the first comparison circuit can detect the thick paper. A thin paper ticket is detected in another comparison circuit.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a paper sheet conveying device according to an embodiment of the present invention.

The paper sheet conveying device according to the embodiment is provided so as to be able to move relatively close to and away from a fixed magnet 4, and output voltage as shown in FIG. 2 corresponding to the distance from the magnet 4. A magnetic sensor 2 to be sent out, a drive mechanism 1 for moving the magnetic sensor 2 relatively close to each other in accordance with the thickness of the paper sheet 5 to be conveyed, and a reference voltage equal to the output voltage from the magnetic sensor 2. and another comparison circuit 3 that compares the output voltage from the magnetic sensor 2 and another reference voltage. In this case, one reference voltage is a thick paper reference voltage 7, and the other reference voltage is a thin paper reference voltage 8.

Therefore, according to this sheet conveying device, when the sheet 5 is conveyed to the drive mechanism 1, the sheet 5
The drive mechanism 1 is displaced in accordance with the thickness of the film. Along with this operation, the distance between the magnetic sensor 2 and the magnet 4 also changes, and the output of the magnetic sensor 2 also changes as shown in FIG. This magnetic sensor output (thickness detection voltage) is compared with a thick paper reference voltage 7 in one comparison circuit 6, and also compared with a thin paper reference voltage 8 in another comparison circuit 3. Thereby, paper sheets that are thicker and thinner than the reference are detected.

[0010] In other words, conventionally, medium identification in conveying devices for magnetically printed media has been performed based on whether the magnetic pattern, transmitted light pattern, and thickness of the medium are within standard values. Since it does not have a detection mechanism for thinner media, even thinner media were accepted as long as the magnetic pattern and transmitted light pattern were within the standards. For this reason, even thin counterfeit media were identified as acceptable.

According to this embodiment, since tickets that are thinner than the standard are also detected, thin counterfeit media that were conventionally accepted can be identified as rejected.

Note that it is also possible to provide three or more comparison circuits.

[0013]

As explained above, according to the paper sheet conveying device of the present invention, it is possible to compare the thickness detection voltage of paper sheets with the thin paper reference voltage, so that it is possible to detect paper sheets that are thicker than the standard. This has the effect of being able to detect not only paper sheets that are thinner than the standard, but also paper sheets that are thinner than the standard.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing a paper sheet conveying device according to an embodiment of the present invention.

FIG. 2 is a graph showing the output characteristics of the magnetic sensor according to the example.

[Explanation of symbols]

1 Drive mechanism 2 Magnetic sensor 3 Comparison circuit 4 Magnet 5 Paper sheets 6 Comparison circuit

Claims (1)

[Claims] 1. In a paper sheet conveying device that transports paper sheets, a magnetic sensor that is provided so as to be able to approach and separate from a fixed magnet, and that sends out an output voltage that corresponds to the distance between the magnet and the magnet. a drive mechanism for moving the magnetic sensors relatively close to each other in accordance with the thickness of the paper sheet to be conveyed; and a comparison circuit for comparing the output voltage from the magnetic sensor with a reference voltage. . A paper sheet conveying device comprising: another comparison circuit that compares the output voltage from the magnetic sensor with another reference voltage.