THREAD FASTENING STATE DETECTION DEVICE OF ELECTRIC ROTARY TOOL, TORQUE ADJUSTMENT METHOD OF THE SAME, AND THREAD FASTENING CONTROL METHOD BY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a thread fastening state detection device of an electric rotary tool, a torque adjustment method of the same, and a thread fastening control method by using the same, in which thread fastening can be performed simply, easily, and properly during thread fastening work by providing a torque detection element in a torque adjustment mechanism for controlling clutch operation of a clutch mechanism in the electric rotary tool, and detection of a torque increase, detection of a torque value, as well as quality determination of a thread fastening state can be performed simply and easily during the thread fastening work.SOLUTION: In a clutch mechanism 14, there is provided a torque adjustment mechanism 20 which comprises a cylindrical casing 24 for storing a spring 22 that elastically supports a steel ball 16 engaging with an internal gear of a speed reduction mechanism, and is provided with an adjustment screw tool 28 for adjusting the elasticity of the spring in the cylindrical casing in an externally operable manner. A torque detection element 32 is provided on the outside surface of the cylindrical casing.SELECTED DRAWING: Figure 2