| 摘要 |
PROBLEM TO BE SOLVED: To drive a driven member so as to accurately follow the drive of a driving member even if slack occurs in a stretched portion of a tension member, which is stretched between the driving member and the driven member, due to the elongation of the tension member.SOLUTION: In a drive assembly in which the driven member is driven to a target position in accordance with the drive position of the driving member by moving a tension member 186, which is stretched between the driving member and a driven member 195, in a belt spun direction by a driving member 194 which drives with drive power from a driving source 188, alternatively, to start driving the driven member according to the drive start timing of the driving member, the drive assembly comprises: tension change means for changing the tension of the tension member; and tension control means for controlling the tension change means so that the tension of the tension member increases if a predetermined tension reduction condition is satisfied.SELECTED DRAWING: Figure 1 |
