Patent ID: 7152472

Claim:
A measuring apparatus for obtaining a drag acting when a press-in portion ( 11 ) of a press-fit terminal ( 10 ) is pressed into a hole (H) of an electric device (K) and held by being squeezed and widening the hole (H), comprising: at least two jigs ( 21 ; 210 ) relatively displaceable to hold the press-in portion ( 11 ) from substantially opposite sides along a direction at an angle to a longitudinal direction (LD) of the press-in portion ( 11 ) and capable of forming a substitution hole ( 28 ; 280 ) having a dimension substantially corresponding to a hole diameter of the hole (H) when a target position is reached; displacement measuring means ( 26 ) for measuring displacement of the jigs ( 21 ; 210 ); a load measuring means ( 25 ) for measuring a load acting on the jigs ( 21 ; 210 ) from the press-in portion ( 11 ) when the jigs ( 21 ; 210 ) are moved closer to the press-in portion ( 11 ); a storage ( 42 ) for storing a data table for the electric device (K) written with a load necessary to widen the hole (H) of the electric device (K) and the hole diameter of the widened hole, and a calculating portion ( 41 ) for receiving the measured load and the hole diameter between the jigs ( 21 ; 210 ) obtained from the measured displacement amount of the jigs ( 21 ; 210 ) and calculating a load at a point of coincidence of a data table for the terminal and the data table for the electric device (K).