STRAIN MEASURING INSTRUMENT

PROBLEM TO BE SOLVED: To provide a strain measuring instrument capable of measuring strain or stress without bonding a strain gage onto a measuring object, and capable of carrying out measuring work easily without requiring great labor for a worker irrespective of the number of measuring points. SOLUTION: This strain measuring instrument comprises a press-contact member 2 having a press-contact face 8 brought into press contact with the strain gage 17; a holding member 1 for holding the press-contact member 2 to be movable along a normal direction of the press-contact face 8; an elastic member 16 for energizing the press-contact member 2 toward a direction projected from an opening end part of the holding member 1; and a magnet 3 for attracting the holding member 1 onto the measuring object W comprising a magnetic substance, when the holding member 1 is moved to be approached to the measuring object W under the condition where the strain gage 17 is interposed between the measuring object W and the press-contact face 8. Energizing force of the elastic member 16 is imparted to the central part of the press-contact member 2 via a sphere 11. The strain gage 17 is bonded onto the press-contact face 8 formed of a rubber material 7. COPYRIGHT: (C)2005,JPO&NCIPI