Robot

Abstract

A robot includes a hand that grips an object and a control unit that operates the hand, the hand includes fingers that are able to grip the object at four or more contact points, and an object of which a metallic tone index is equal to or higher than 5 is gripped with the hand.

What is claimed is: 
     
         1 . A robot comprising:
 a hand that grips an object;   a control unit that operates the hand; and,   a grip planning unit that determines an opening and closing direction of the fingers,   wherein the hand includes fingers that are able to grip the object at four or more contact points, and   wherein the object of which a metallic tone index is equal to or higher than 5 is gripped with the hand,   wherein the grip planning unit inclines the fingers in the same direction as the inclination of the length direction of the object about a plane on which the object is placed from the direction perpendicular to the plane when an angle between the plane and the length direction of the object is equal to or greater than a predetermined angle threshold.   
     
     
         2 . The robot according to  claim 1 , wherein the control unit includes:
 a position and attitude calculating unit that calculates position and attitude of the object on the basis of a three-dimensional point group obtained by imaging the object; and   wherein the grip planning unit that determines an opening and closing direction of the fingers in a direction perpendicular to a length direction of the object and an imaging direction of the object.   
     
     
         3 . The robot according to  claim 2 , wherein the grip planning unit causes the hand to approach the object from a point spaced apart by a predetermined distance from the position of the object in a direction perpendicular to the length direction of the object and not having a component parallel to the plane. 
     
     
         4 . The robot according to  claim 1 , wherein the control unit includes an attitude control unit that adjusts an attitude of the object by changing a force for gripping the object with the hand. 
     
     
         5 . The robot according to  claim 4 , wherein the fingers have a shape and a size enabling caging and self alignment on the object.