A tightening head (1) is provided with at least two sockets (4i, 4ii) which are alternatively connected to an output shaft of a nut runner (3), a socket replacing mechanism (6) and a bolt supplying mechanism (7). The socket replacing mechanism (6) is provided with a moving mechanism (61) and a posture changing mechanism (64). The moving mechanism (61) moves each socket (4i, 4ii) between a using position where the socket (4i, 4ii) agrees with an axis of the output shaft of the nut runner (3) and a waiting position which is distant from the axis. The posture changing mechanism (64) changes a posture of each socket (4i, 4ii) to an upward posture corresponding to the waiting position and to a tightening posture corresponding to the using position. The bolt supplying mechanism 7 is provided with bolt magazines (8i, 8ii) and bolt holding mechanism (9i, 9ii). During a bolt tightening step is executed by one socket in the using position, the bolt (B) is supplied to the other socket in the waiting position.
展开▼
机译：拧紧头（ 1 ）至少带有两个插座（ 4 i ，4 ii ），它们分别连接到螺母扳手（ 3 ）的输出轴，插座更换机构（ 6 ）和螺栓供应机构（ 7 ）。插座更换机构（ 6 ）设置有移动机构（ 61 ）和姿势改变机构（ 64 ）。移动机构（ 61 ）移动每个插槽（ 4 i ，4 ii ）在插座（ 4 i ，4 ii ）与输出轴一致的使用位置之间螺母扳手的轴（ 3 ）和远离轴线的等待位置。姿势更改机制（ 64 ）更改每个插槽（ 4 i ，4 ii ）更改为与等待位置对应的向上姿势，并更改为与使用位置对应的收紧姿势。螺栓供应机构 7 配有螺栓匣（ 8 i ，8 ii ）和螺栓固定机构（ 9 i ，9 ii ）。在使用位置中的一个插座执行螺栓拧紧步骤的过程中，在等待位置中将螺栓（B）供应到另一个插座。
展开▼
