開缶時の指掛かり性を考慮した飲料用アルミ缶蓋の設計

概要

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This paper introduced the finite element analyses into ergonomics designs of aluminum beverage can ends to evaluate perception of pressure applied to the human fingertip numerically and objectively. At first, experiments of indenting vertically the fingertip pulp by a probe and the tab of the can ends have been done to observe force responses and to experience feelings in the fingertip. It is found that a typical force-displacement curve can be divided into three parts according the curve gradient. We feel a touch at the first part of the force-displacement curve, and then feel pressure and our pulse at the second part, finally feel discomfort followed by pain at the last part. The finite element analyses have been performed to simulate the tab indenting the fin-gertip vertically for developing the finite element model of the fingertip. It is confirmed that the simulation results agree well with the experimental observations. Moreover, a simulation of finger lifting the tab of the can end has also been performed, and discomfort in the fingertip has been evaluated numerically to present the finger accessibility of the tab. Finally, the finger accessibility comparison of two kinds of tab ring shape designs showed that the finger accessibility of the tab that may have a larger contact area with the finger is better.
社団法人日本機械学会の論文
2007-09-25