| 摘要 |
PROBLEM TO BE SOLVED: To provide an impact rotary tool capable of reducing a trouble in which a driving source is controlled into a prescribed drive state before a torque reaches a prescribed torque by erroneous detection of the torque caused by a noise generated by shock of an impact.SOLUTION: An impact rotary tool 11 includes an impact force generation part 17 for generating an impact force by changing the power of a motor 15 into a pulse-like torque, and a main shaft 21 for transferring the pulse-like torque to a tip tool 23 by the generated impact force, and also includes a torque sensor 26 for outputting a signal corresponding to the torque applied onto the main shaft 21, a stop determination part for determining whether a torque value determined from the signal corresponding to the torque reaches a prescribed torque value or not, and a main body control circuit 30 for controlling the motor 15 into a prescribed drive state, when determined that the torque value reaches the prescribed torque value by the stop determination part. The stop determination part is provided on the main shaft 21. |
