Patent ID: 8347766

Claim:
An automatic screw tightening apparatus that transfers a screw from a screw supplying mechanism to a screw tightening mechanism by a screw transfer mechanism using air suction of the screw tightening mechanism and tightens the screw to a predetermined screwed subject part, wherein: a screw discharging unit for transferring the screw to a transfer tube with the head part of the screw being in the lead is provided in the screw supplying mechanism, an engaging unit for engaging the head part of the screw transferred from the transfer tube with a fore end of a driver is provided in a fore-end part of the screw tightening mechanism, and an openable and closable sealing cover for preventing air from leaking is provided in the fore-end part of the screw tightening mechanism, and is opened and exposes the screw engaged with the fore end of the driver when the fore end of the driver moves straight, whereby screw tightening is performed.