Paper thickness detecting device

Abstract

The invention relates to a paper thickness detecting device, which is characterized by comprising a reference roll, a detecting roll, a detecting block, a retaining block, a first press part, a shift detecting part and a second press part. The reference roll is arranged on a fixed rotary shaft and used as judging reference of the thickness, the detecting roll opposite to the reference roll contacts with the reference roll and is arranged at one end of the detecting block, the other end of the detecting block rotates freely by utilizing a supporting shaft as the center to shift according to the thickness of paper passing between the reference roll and the detecting roll and is fixed, the retaining block retains the supporting shaft of the detecting block at least, the first press part is fixed on the retaining block and presses part of the detecting block while keeping tightness between the detecting roll and the reference roll, the shift detecting part detects shift of the detecting roll, and the second press part presses the retaining block in the attaching direction of the detecting roll to the reference roll during thickness detection of paper.

Description

[0001] This application is a divisional application of the following patent application: the application date is August 31, 2007, the application number is 200780100425.8, and the invention name is "Paper Thickness Detection Device". technical field [0002] The present invention relates to a paper thickness detection device for detecting the thickness of a banknote mounted on a banknote identification device in a cash handling machine installed in a bank or the like, for example. Background technique [0003] In a banknote identification device included in a cash handling machine or a device that handles banknotes such as an automatic vending machine, it is important to identify counterfeit banknotes made of tape, paper, etc., and for this reason, a banknote identification device is included. [0004] In particular, in recent years, the counterfeiting technology has become more sophisticated, and for example, there have been technologies for counterfeiting banknotes, securit...

AI Technical Summary

Problems solved by technology

[0008] However, in the conventional art described above, it is extremely difficult to set the gap d between the detection roller 102 and the reference roller 101.

In addition, even if the above-mentioned gap d can be set correctly, errors may gradually occur during use.

[0009] In addition, in the conventional technology, the detection roller is always in contact with the reference roller, but if the detection roller is always in contact with the reference roller, there is a problem that the detection roller is shaken (pitching) while the paper is passing, and the thickness cannot be accurately detected.

[0010] In addition, if the paper passes between the detection roller and the reference roller, fine dust adhering to the surface of the paper adheres to the detection roller and the reference roller, and if the dust accumulates on the roller, there is a problem that the correct thickness cannot be detected.

Regarding this problem, a scraper (scraper) for removing foreign matter is disclosed in Japanese Patent Laid-Open No. 10-283520, but if the scraper is fixed on a part of the device, even if it is an elastic scraper, it will be damaged by scraping. The front end of the plate hinders the operation of the bill when it protrudes into the detection roller, so there is a problem that the correct thickness cannot be detected

[0011] In addition, in the case where a plurality of detection blocks including detection rollers are arranged in a direction perpendicular to the conveyance direction of the paper, and the detection rollers contact the entire surface of the conveyed paper to detect the thickness of the entire surface of the paper, since the paper protrudes When the detection rollers hit all the detection rollers at once, the detection block moves violently due to the collision, and there is a problem that a kick occurs in the obtained detection output waveform.

In addition, there is a problem of paper jams due to the obstruction when the paper protrudes into the detection roller

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