TOOL FOR WRENCH, WRENCH WITH TOOL, AND FASTENING OF UNION NUT

摘要

PROBLEM TO BE SOLVED: To provide a tool for wrench capable of grasping the accurate fastening force of a screw member. ;SOLUTION: This tool 10 for wrench is provided with a base 11 attachably/ detachably mounted on a wrench, and moving angle detecting means which is mounted on the base 11 and detects the fastening moving angle of the screw member when the screw member is fastened by the wrench, the moving angle detecting means is provided with graduations 20 related to an angle and probes 16a, 16b which move along the graduations 20 by action of gravity. The fastening moving angle of the screw member is detected by the moving angle detecting means, and the detected fastening moving angle of the screw member is taken as an index of the fastening force, thus it is possible to grasp the accurate fastening force of the screw member with various factors such as wear of the screw member eliminated.;COPYRIGHT: (C)2000,JPO