PURPOSE: To obtain a detection mechanism for overs and shorts of a package coin capable of eliminating the influence of a burr and wear, etc., by directly detecting the number of accumulated coins. ;CONSTITUTION: The piled number of coins can be counted essentially by counting the boundary line of the coin in the package coin M by a boundary line counter part 8. Thereby, a comparator part 10 can accurately judge the overs and shorts of the coin in the package coin M. In other words, the overs and shorts of the coins can be detected more accurately compared with a conventional overs and shorts detection mechanism in which the detection for overs and shorts of the accumulated coins is performed by detecting the height dimension of the package coin M indirectly and furthermore, including the dimensional error of the burr and the wear, etc., of the coin.;COPYRIGHT: (C)1993,JPO&Japio
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