US Patent 10099221 Column attachment device

A ferrule 10 is pressed by a pressing plate 35, and the ferrule 10 is thereby sandwiched and fixed between a ferrule receiving part 20 and ferrule pressing part 30. The pressing plate 35 is displaced by a displacing mechanism 350, whereby the pressing plate 35 is switched between a contacting state in which the pressing plate 35 is in contact with the ferrule 10 and a non-contacting state in which the pressing plate 35 is not in contact with the ferrule 10 and the ferrule 10 can pass thorough the inside of the ferrule pressing part 30. By displacement of the pressing plate 35 to the non-contacting state, the ferrule pressing part 30 can be extracted from the ferrule 10 side, and the ferrule pressing part 30 can therefore be removed from a column 2 in a state in which the ferrule 10 is attached in a swaged fashion.