Patent ID: 8893362

Claim:
A turret tool holder comprising: a turret rotatably supported on a support; a turret drive section adapted to rotate the turret; a pair of engaging means adapted to position the turret at a predetermined rotational position in an engagement state wherein an engagement element arranged on the turret and an engagement element arranged on the support are engaged with each other, and allow the turret to rotate in a disengagement state wherein the engagement elements are disengaged from each other; and transmitting means adapted to be engaged with the turret drive section so as to limit the free rotation of the turret and transmit drive power to the turret drive section, wherein the transmitting means and the engaging means are adapted to coordinate so that the transmitting means transmits the drive power to the turret drive section in the disengagement state of the engaging means wherein the transmitting means has a movable clutch member adapted to be detachably engaged with an engagement portion arranged on the turret drive section, and wherein the turret tool holder comprises a movement mechanism adapted to simultaneously translate the clutch member and one of the engagement elements so that the clutch member is engaged with the engagement portion before the engagement elements of the pair of engaging means are disengaged from each other, the engagement state of the engaging means being switched to the disengagement state while the free rotation of the turret is limited by the engagement between the clutch member and the engagement portion.