NUT RUNNER WITH AXIAL FORCE METER

PROBLEM TO BE SOLVED: To provide a nut runner with axial force meter which instantly measures the axial force of a bolt or instantly checks if the axial force is good or bad, dispenses with the necessity of preprocessing of the bolt, and is easy to use and good in durability. SOLUTION: A movable body 2 is connected to a base body 1 to be linearly driven, and a torque generating body 4 is attached to a holder frame 3 provided on the movable body. A cylindrical socket body 8 with an end having an engagement hole 10 to engage a bolt head and the other end being opened is rotatably attached to have an axis core not aligned with a drive shaft 7 of the torque generating body, and the drive shaft and the socket body are connected by a rotation transmission mechanism 9. A probe 100 having an oscillation generating body for vertically oscillating the bolt head with electromagnetic force and an oscillation detecting body for detecting the vertical oscillation and converting it to a signal for outputting, wherein at least the oscillation detecting body is arranged inside the socket body, and the probe is attached to a movable member 11 to linearly move to the movable body. COPYRIGHT: (C)2005,JPO&NCIPI