Patent ID: 8807616

Claim:
A robot hand fitted to an arm of a robot for placing a work unit into a cassette, the work unit including an annular frame, an adhesive tape and a plate-shaped work, the annular frame having an opening portion, a pair of first positioning surfaces extending parallel to each other with the opening portion sandwiched therebetween, and a pair of second positioning surfaces extending parallel to each other in a direction orthogonal to the first positioning surfaces with the opening portion sandwiched therebetween, an outer perimeter portion of the adhesive tape being affixed to the annular frame, the plate-shaped work being affixed to the adhesive tape, the robot hand comprising: a mounting surface to which the work unit is mounted with some freedom of horizontal movement allowed for the work unit; a pair of anti-fall hooks each of which is formed at one edge portion of the mounting surface to support a front edge portion of the work unit mounted to the mounting surface so as to prevent the work unit from falling off the mounting surface; and a pair of support sections each of which is provided at another edge portion of the mounting surface opposite to the anti-fall hooks to support a rear edge portion of the work unit, wherein each of the support sections is cylindrical, and further wherein if the annular frame collides with the cassette when the robot is activated to place the work unit, mounted to the mounting surface of the robot hand, into the cassette, the robot hand permits the rear edge portion of the work unit to come into contact with one of the cylindrical support sections so as to allow the work unit to be rotated on the mounting surface about the cylindrical support section in contact with the rear edge portion as a fulcrum and allow the work unit to be placed into the cassette.