Patent ID: 7761965

Claim:
An automatic swiveling turret apparatus for a machine tool comprising: a swiveling shaft part disposed on a turret stand; a turret disposed on this swiveling shaft part so that the turret is free to swivel and free to slide in an axial direction; and a clutch device provided for disengageably anchoring and fastening an indexed position of the turret by the sliding of this turret in the axial direction; sliding of the turret causing the anchoring and fastening of the clutch device to be released to swivel the turret; and causing the turret again to undergo return sliding at the indexed position and to be anchored and fastened in a non-swiveling fashion by the clutch device; the automatic swiveling turret apparatus for a machine tool further comprising: a pneumatic sliding driving mechanism having an air supply device used for sliding driving, a clutch release pressure chamber into which air is delivered by the air supply device, which causes the turret to slide in the axial direction, and releases the anchoring and fastening of the clutch device, and a sliding movement gap that is reduced by the sliding for releasing a clutch of the turret; a resistance reducing member for reducing sliding frictional resistance during swiveling of the turret, provided to an inside surface part of the sliding movement gap that is abutted when air is delivered into the clutch release pressure chamber and the turret is caused to slide; and a wedge mechanism in which a wedge engaging part that is moved or opened by the return sliding of the turret and a wedge part that engages with the wedge engaging part are provided, the wedge mechanism being constructed so that a wedge driving device drivingly or urgingly moves the wedge part, which engages with the wedge engaging part, whereby the turret, which has undergone return sliding, which is anchored and fastened by the clutch device, and which is in a working position that does not permit swiveling, is anchored and held by the wedge.