指爪用ジェル状プロテクターの利用が応力ひずみ関係に及ぼす影響について

抄録

The nail works to catch the force applied to the finger pad and plays the important role of physical exercise. However, the nail problems such as flat nails and spoon nails have been reported these days, so that it is necessary for the approach to prevent them. It seems that a jelly coat on the fingernails qualitatively affects the gripping force. Therefore, the purpose of this study was to reveal the effects of using the jelly-type protector on the gripping force as the objective data. From the above, we measured the relationship between the fingernails strain and the gripping force with 3 conditions (no-jell, 3layered jell and 5layered jell on their fingers of their dominant hands). For the measurement, three male participants mounted the bidirectional strain gauge on their fingers of their dominant hands, and then gripped the gripping force measuring device with their maximal efforts on three different conditions. As a result, it was revealed that the jelly-type protector on the nail decreased the strain of fingernails because of applying the multilayer on it.