Terminal displacement amount detection method, terminal insertion method, terminal displacement amount detection device, and terminal insertion device

A terminal insertion method;

• comprising the steps of:
• a moving step of moving linearly a holder holding parallel to one another in a single row a plurality of connector terminals each of which is crimped and connected to an end portion of an electrical wire while measuring a movement distance of the holder with prespective tips of each of the plurality of connector terminals pointing in a traveling direction;
• a passage detection step of detecting respective passages of the respective tips of each of the plurality of connector terminals at respective target points on respective paths, the respective target points coinciding with each other in a side view when the respective paths of each of the plurality of connector terminals is viewed in an arrangement direction of the plurality of connector terminals;
• a displacement amount acquiring step of acquiring a displacement amount between the respective tips of each of the plurality of connector terminals based on the movement distance when the respective passages are detected for the respective tips of each of the plurality of connector terminals;
• and
• an insertion step of further moving linearly the holder when the displacement amount is less than a predetermined threshold so as to simultaneously insert the plurality of connector terminals into a plurality of terminal accommodation chambers of a connector housing, the connector housing being disposed such that the plurality of terminal accommodation chambers is positioned one to one along the respective paths of each of the plurality of connector terminals.