Clamping device for an elongated piece

摘要

A clamping device includes two clamping units. At least one of the clamping units includes a sheave having a pinion portion biased toward the other of the clamping units so as to hold an elongated piece between the clamping units, and a rack member engaging the pinion portion of the sheave. Preferably, each of the clamping units has a frictional clamping surface which presses against the elongated piece.