抄録
It is hard to use the drill by bare-handed. We want to develop machine that the vibration or impact was suppressed. A woodpecker is enumerated as for repeatedly an impact. A woodpecker strikes its beak toward a tree repeatedly. But, the damage of the brain or the living body doesn't occur by this action. Therefore, it is predicted that the brain and body of woodpecker is protected from the shock by some methods. And it turns out that the woodpecker has the original mechanism that endures impact. In this study, from the structure of woodpecker (especially hyoid bone) makes a model. And the model is analyzed. It thinks about the endures impact from the result.
