Tension control apparatus

摘要

A tension control apparatus includes at least two guide rollers and at least one dancer roller disposed so as to be movable relative to said guide rollers, and applies a predetermined amount of tension to a linear body wound about the guide rollers and dancer roller. This apparatus has a tension control device for variably controlling the tension applied to the linear body by adjusting an angle between a vertical line and a line connecting respective rotational centers of the guide rollers and dancer roller.