| 摘要 |
PROBLEM TO BE SOLVED: To provide a code plate group capable of flowing in a pickling process together with a work, a code plate to be read out from any side of surface and rear sides, a code plate holding tool capable of reading out a code plate in a state attaching the code plate to a work carrying tool, and a code plate reading/discriminating device capable of suppressing the vibration of the code plate. SOLUTION: A group of code plates 3 using an acid resisting material is divided into several small groups, a hole 60 having a different shape in each small group is formed on a display part Q so as not to display a character and a pattern. Each small group is divided into a plurality of fine groups and respective fine groups are discriminated by the number of small holes annexed to the hole 60. Punch signal parts P and display parts Q on the surface and rear sides of the code plate 3 are respectively matched or punch codes for identifying the surface and rear sides are formed on a part of the punch signal part P. A cushioning material is inserted into the bottom part of a code plate loading part of the code plate reading/discriminating device, tilted and fixed. |
