Tension regulator in double twister

A double twister including a tension regulator and a spindle, a stationary disk disposed above the spindle adapted to receive a cop placed at the center of the stationary disk, a guide tube with a yarn passage at the center thereof extending axially of and within the stationary disk, said tension regulator comprising a tenser body having a multi-staged cylindrical shape and a yarn guide hole communicating with the yarn passage of the guide tube adapted to be mounted on the top end of a cop placed at the center of a stationary disk disposed above the spindle, and ring tensers freely fitted on the respective stages of the tenser body with clearances allowing passage of yarn between the ring tensers and the tenser body.