JPH058520Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a fixture for a capillary column bundle in a gas chromatograph apparatus.

(Prior Art) Gas chromatograph apparatuses that use capillary columns have very long columns of 10 to 50 m, so they are usually wound into a coil around a winding frame and suspended from a support in a column oven. For this reason,
The capillary column was swayed by the circulating air that equalized the temperature of the column oven, and there was a risk that the end connected to the sample injection port or detector could become fatigued and break.

In order to solve this problem, it may be possible to use two arms to support the column at two points, but this poses a problem in that the position of the arms must be changed according to the column diameter, which is time-consuming.

(Purpose) The present invention was developed in view of these problems, and its purpose is to mount a capillary column that can be fixed in a column oven regardless of the winding diameter of the capillary column bundle. The goal is to provide the tools.

(Summary of the invention) In other words, the present invention is characterized by a plurality of arm members each having a holding part at the tip that comes into contact with a frame that holds a coiled capillary column bundle, and The fixing device is removably attached to the frame and grips the arm member so that the position of the holding portion can be adjusted so that the holding portion holds the frame.

(Example) Therefore, the details of the present invention will be explained below based on the illustrated example.

FIG. 1 shows an embodiment of the present invention, in which reference numeral 1 denotes a fixture that is removably fixed to a boss B provided on a partition network A of a column oven with screws 2, etc. Three arm members 3, 3, 3 each having a column holding portion 3a formed by bending the tip end into an L-shape are attached to the arm member 3 at equal intervals so as to be extendable and retractable in the radial direction.

In this embodiment, the lengths of the arm members 3, 3, 3 are adjusted by expanding and contracting them in accordance with the diameter of the winding frame D of the capillary column bundle C to be connected to the chromatography apparatus. 3 holding part 3
a, 3a, 3a are hooked onto the frame D of the column bundle C and fixed to the fixture 1 so as to be pulled toward the center. Fixing fixture 1 with capillary column bundle C attached in this way is fixed to boss B attached to partition net A of the column oven with screws 2, and one end of the capillary column is connected to the sample injection port. , and connect the other end to the detector. At this time, if the capillary column length from column frame D to the sample injection port is significantly different from the capillary column length from the column cage to the detector, loosen screw 2 and rotate frame D to one side. By letting out one from frame D and winding the other on frame D, the column lengths can be adjusted to approximately the same length.

In this embodiment, the arm is formed of a wire rod, but as shown in FIG. 2, the tip of the plate material 5 is bent to form the column holding part 5a, while the arm is formed on the main body side according to the column diameter. Multiple through holes 5
It is clear that the same effect can be obtained even if the holes 5b, 5b, and 5b are provided (FIG. 1A) or the elongated hole 5c is formed in the axial direction (B).

Furthermore, although three arm members are used in the above-described embodiment, the same result can be achieved even if two arms 6, 6 are telescopically attached to the fixture 7 in a straight line as shown in FIG. It is clear that the same effect can be obtained even if four or more arm members are attached to the fixing device so as to be extendable and retractable at equal intervals.

(Effects) As explained above, the present invention includes a plurality of arm members each having a holding part at the tip that comes into contact with the frame that holds the coiled capillary column bundle, and a plurality of arm members that can be attached and removed inside the column oven. and a fixture that grips the arm member so that the position of the holding part can be adjusted so that the holding part holds the frame, so multiple locations can be used as support points according to the winding diameter of the capillary column. It can be fixed to the column oven and maintain a constant posture regardless of the circulating air inside the column oven.

In addition, the fixing device can be attached to and removed from the boss in the column oven using screws, etc., so by providing multiple bosses in the column oven, the capillary column can be easily relocated to an appropriate position. Not only is this possible, but by rotating the fixture, the length of the capillary column at both ends can be adjusted extremely easily to match the positions of the sample injection port and the detector.

[Brief explanation of the drawing]

1A and 1B are a plan view and a sectional view taken along line LL, respectively, showing one embodiment of the present invention; FIGS. 2A and 2B are a plan view, respectively, showing another embodiment of the arm member; The figure is a plan view showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Fixing tool, 2...Screw, 3...Arm member, 3a...Column holding part, A...Partition net, B...
...Boss, C... Capillary column bundle, D...
frame.

Claims (1)

[Scope of utility model registration request] A plurality of arm members each having a holding part at the tip thereof that comes into contact with a frame holding a coiled capillary column bundle; A capillary column fixture comprising a fixture that grips the holding portion so that the position of the holding portion can be adjusted so as to hold the frame.