Abstract: A grandstand seating arrangement having seating level members arranged in sequentially elevated relation to one another. A rigid frame that couples and surrounds the seating members has a lower frame coupled to the lifting arrangements and an upper frame coupled rigidly to the lower frame. A lower stop is disposed on each stanchion support and arranged at a height corresponding to the height of the associated seating level member. Seating level member supports support the seating level members, each of which is coupled to, and displaceable along, a respective stanchion support. The seating level member supports are supported by lower stops when the lifting arrangements are in the lower most position. When the lifting arrangements raise the rigid frame, the seating level member supports and the seating levels thereon are sequentially raised from the respective lower stops.

Abstract: A method for teaching a holding position and a holding angle of a work by a hand of a robot to the robot in a robot system having a visual sensor attached to a movable arm of the robot. First, the work is held by the hand which is in a prescribed reference angle state and put down on a working table with keeping the holding state. Next, the centroid position and the angle of the principal axis of the work are recognized by the visual sensor. Finally, the holding position and the holding angle are acquired by using the centroid position and the angle of the principal axis, a posture data of the robot and the hand, and a mutual relation data of a robot coordinate, a visual coordinate and a hand coordinate of the robot system.