| 摘要 |
PROBLEM TO BE SOLVED: To provide a detection device which can suppress reduction in detection accuracy of an axial force.SOLUTION: A detection device which detects an axial force of a bolt member having a head formed with a recess comprises: a bearing member at least a portion of which is arranged in the recess; an elastic member which is connected to the bearing member, includes an insertion part inserted to a groove formed on the inner side surface of the recess so as to be recessed outward with respect to the radial direction to the central axis of the bolt member, and is elastically deformed so as to press at least a portion of the head in the state where the insertion part is arranged in the groove; and an ultrasonic sensor which is connected to the bearing member and arranged in the recess.SELECTED DRAWING: Figure 7 |
