Paper category discriminating device

Abstract

Provided is a paper sheet distinguishing device with high resolution in the direction orthogonal to the conveying direction of paper sheets, which can be installed in a paper money handling device. This paper sheet distinguishing device comprises standard rollers 28 and 48 having a rotation shaft in the direction orthogonal to the conveying direction of paper sheets and in the direction opposite to the faces of the paper sheets to be conveyed for determining a standard position to detect the thickness of the paper sheets. A thickness detecting sensor which comprises a detecting roller 11 on one end which faces toward the standard roller 28 and 48 with a paper sheet conveyance surface interposed and a lever displacement detecting means on the other end is adapted to detect the thickness of the paper sheets from the displacement of the lever by conveying the paper sheets to pass between the standard rollers 28 and 48 and the detecting roller 11. Those thickness detecting sensors 1 to 8 and 41 to 47 are aligned in a staggered manner, and configured to extract components below predetermined wavelength from the thickness detection signals of the paper sheets passing each of those thickness detecting sensors, and to detect the appearing position of the paper sheets where the extracted amplitude below the predetermined wavelength appears in not less than or less than a constant value, and to decide the authenticity of the paper sheets by collating the detected appearing position with a preliminarily stored appearing position.

Description

Technical field [0001] The invention relates to a paper discriminating device. Background technique [0002] As paper discriminating devices, for example, paper currency handling devices (also called ATMs) and automatic vending machines, etc., which process paper currency, are important to discriminate the authenticity of paper currency, so a paper currency discriminating device is provided inside. [0003] As a conventional banknote discriminating device that discriminates the authenticity of a banknote, it is described in, for example, Japanese Patent Application Publication No. 63-247895. [0004] The banknote discriminating device described in the gazette inserts the banknote between the reference roller and one end of the detection lever, detects the displacement of the lever by the displacement detection unit provided at the other end of the detection lever, and determines the authenticity based on the number of unevenness of the displacement signal , Can exclude counterfei...

AI Technical Summary

Problems solved by technology

[0008] However, among counterfeit bills, there are counterfeit bills in which unevenness is specially provided on the printing surface and paper. Such counterfeit bills are difficult to distinguish from genuine bills, and may be overlooked by existing bill discrimination devices.

[0009] In addition, there is a possibility of erroneous detection by recognizing minute creases formed on banknotes as irregularities and determining that they are counterfeit.

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