Patent ID: 11921002
Assignee: FANUC CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC G  F | IPC F  G

Claim 15:
16. The power transmission device according to claim 1, wherein the detection unit is a belt detection unit and the displacement is a belt displacement, wherein the belt detection unit is configured to detect the belt displacement of the belt in a direction intersecting a surface of the belt, the belt displacement including a first displacement of the belt on first side of the first pulley and a second displacement of the belt on a second side of the first pulley, wherein:
the belt detection unit includes a first detector unit and a second detector unit, the first detector unit is configured to detect the first displacement of the belt at a first predetermined measuring point, the second detector unit is configured to detect the second displacement of the belt at a second predetermined measuring point; and
the distance from the border between the portion where the belt and the first pulley are in contact with each other and the portion where the belt and the first pulley are not in contact with each other, to the first or second predetermined measuring points where such distance is equal to or smaller than the diameter of the first pulley, each of the first and second predetermined measuring points being disposed at respective locations along the belt where the belt and the first pulley are not in contact with each other.