Patent ID: 8381902

Claim:
A belt meandering preventing device for a running test device, the belt meandering preventing device being provided in the running test device that evaluates a running characteristic of a rolling element while the rolling element is in contact with a belt laid between a pair of drums, and correcting meandering of the belt by drum rocking means that rocks, relative to one of the drums, the other drum and that changes a position of the belt in accordance with an amount of rocking of the other drum, the belt meandering preventing device comprising: first control means that detects the position of the belt and controls the drum rocking means so that a difference between the detected position of the belt and a predetermined target position becomes zero; and second control means that detects the amount of rocking of the other drum rocked by the drum rocking means and controls the drum rocking means so that the detected amount of rocking of the drum becomes a target amount of rocking.