| 摘要 |
PURPOSE:To hold an object so easily as well as to make a quick hold judgeable by judging a quick hold of the object with contact between two different faces among plural faces constituting a polyhedron approximated and a holder. CONSTITUTION:When an object holder 11 is shifted, two feelers come into contact with the same face of a polyhedron 12, so that it is so judged that the object holder 11 will not hold the polyhedron 12, When the object holder 11 is shifted, on the other hand, these two feelers come into contact with the different faces of the polyhedron 12, so that it is so judged that the holder 11 holds the polyhedron 12. In addition, also when the holder 11 is shifted in a state of spreading the feeler, to feelers come into contact with the different faces of the polyhedron 12, so that it is so judged that the holder 11 holds the polyhedron 12. |
