COLUMN AND EXCHANGE DEVICE
The present invention provides a column exchange device for simpler column exchange and a column suitable for this column exchange device. A column exchange mechanism according to the present invention is provided with a column having inward-facing threads at both ends thereof and a first joining part and second joining part for fixing the ends of the column. The column exchange mechanism is characterized in that the first joining part and second joining part have screw parts that are joined to the ends of the column and the direction in which the screw of the screw part of the first joining part is to be turned to tighten the same and the direction in which the screw of the screw part of the second joining part is to be turned to tighten the same are opposite directions.
1 . A column exchange mechanism comprising a column that having inward-facing threads at both ends thereof; and a first joining part and a second joining part for fixing the ends of the column, wherein
the first joining part and the second joining part have screw parts that are joined to the ends of the column, and
the direction in which the screw of the screw part of the first joining part is to be turned to tighten the same and the direction in which the screw of the screw part of the second joining part is to be turned to tighten are opposite directions.
2 . The column exchange mechanism according to claim 1 , wherein
a relationship between the inward-facing threads at both ends of the column is that the directions in which the threads are to be turned to tighten the same are opposite directions.
3 . The column exchange mechanism according to claim 2 , further comprising:
a motor that rotates the column; and
a fixation tool that fix the first joining part and/or the second joining part.
4 . The column exchange mechanism according to claim 3 , further comprising:
a motor that causes the first joining part and/or the second joining part to come close to the column.
5 . The column exchange mechanism according to claim 4 , further comprising:
a cap that is attached to the column.
6 . The column exchange mechanism according to claim 4 , wherein
a warning is displayed when the first joining part and/or the second joining part are/is fixed and not deviated from the column during column exchange.
7 . The column exchange mechanism according to claim 4 , wherein
a liquid feeding pump is stopped when pressure in a column after column exchange does not reach predetermined pressure.
8 . The column exchange mechanism according to claim 4 , wherein
an identification mark is added to the column, and previous column data is referred to.
9 . The column exchange mechanism according to claim 8 , wherein
when there is use history in the column, a warning is displayed when pressure does not fall in a predetermined range based on use pressure of the column.
10 . The column exchange mechanism according to claim 8 , wherein
when there is no use history in a column, a warning is displayed when pressure does not fall in a predetermined range by referring to pressure range data which is set based on a column type and a column size.
11 . The column exchange mechanism according to claim 4 , wherein
analysis is started after confirming that temperature in the column reaches a predetermined temperature or that the temperature in the column reaches a predetermined temperature and is maintained for a predetermined time.
12 . The column exchange mechanism according to claim 4 , wherein
pressure in the column is monitored with a pressure meter, and the column is detached after the column pressure is reduced.
13 . The column exchange mechanism according to claim 8 , wherein
when it is determined that a detached column is reusable based on an analysis result, the column is stored; when it is determined that a detached column is not reusable, the column is discarded.
14 . The column exchange mechanism according to claim 8 , wherein
when performance of a column in use is reduced and is expected to be deviated from a specification, temperature of a column to be attached next is adjusted before exchange.