JPH0712924Y2 - Drain piece for liquid collection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a drain piece for liquid fractionation in which various fractionation patterns can be set and which can be selectively used according to the fractionation type of a fraction collector.

(Prior Art) A fraction collector equipped in a liquid chromatograph has a dropping device that can move vertically and horizontally on a test tube rack as shown in JP-A-61-215962, and the device is subjected to a predetermined test. The target component is separated by moving it to the pipe position, while the unnecessary liquid is switched to the drain side before the fraction collector is introduced.

As another usage form of such a fraction collector, when all of the analysis liquid is guided to the collector side without using the above valve and the target component is dispensed into a test tube to directly drain the unnecessary liquid, drop it. A drain piece is required for accommodating the unnecessary liquid dropped from the container and guiding it to the drain side.

Conventionally, this drain piece is generally formed in a horizontally long gutter shape, and this drain piece has been used by being attached to the front portion of the fraction collector facing the test tube rack.

(Problems to be solved by the device) However, since this conventional drain piece is installed at a fixed position in the fraction collector, it is not possible to test it under this type of usage in which the preparative liquid can be dripped from the dropper at all times. In order to prevent mixing of the preparative liquid into the tubes, the movement of the dropping device is significantly limited, and there is a problem that various preparative methods for each test tube cannot be used.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems and provide a liquid collecting drain piece which has a simple structure and can be used for various kinds of collecting and usage.

(Means for Solving Problems) For this reason, the liquid collecting drain piece of the present invention is the above-mentioned drain collecting drain piece in which the drain hole is formed at the bottom of the drain groove capable of containing the unnecessary liquid. A flow-promoting groove having a minute width capable of accommodating a minute amount of unnecessary liquid is formed at the bottom of the groove, and the groove is communicated with the drain hole, and the lower surface of the drain piece is fitted into the through hole for accommodating the collection container of the rack. The fitting protrusions that are compatible with each other are provided to facilitate the discharge of unnecessary liquid, set various preparative patterns, and make it easy to use properly according to the preparative type of the fraction collector. It has a feature.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.
1 to 11, a box-shaped fraction collector 1 has a rod-shaped arm 4 projecting forward from a horizontally long opening window 3 formed in an upper portion of a front plate 2. On one side of the arm 4, a substantially rectangular tube holder 5 is made movable along the longitudinal direction of the arm 4, and a conduit 6 whose one end is connected to a detector (not shown) is held by the holder 5, and The end is opened downward.

The arm 4 is movable along guide rods 7, 7 installed in the lengthwise direction of the opening window 3, and its base is mounted on a guide block 9 to which a timing belt 8 is fixed. The timing belt 8 is wound around a timing pulley (not shown), and a first pulse motor (not shown) is linked to one of the pulleys.

Further, timing pulleys 11, 11 around which a timing belt 10 is wound are rotatably supported at the front and rear ends of the arm 4 and the second pulse motor 12 is linked to one of the pulleys 11. The timing belt 10 is fixed to a guide block (not shown), and the block is a guide rod 13,1.
It is slidably supported along 3, and the tube holder 5 is connected to its side.

The operation of the first and second pulse motors 12 is controlled by a microcomputer incorporated in a control unit installed in the fraction collector 1, and this computer can input predetermined parameters by means of keys 15 provided on the operation panel 14. The input signal is operated on the basis of information stored in advance, and the processing result can be output to the pulse motor as a control signal.

Then, through the operation of these pulse motors, the arm 4 and the tube holder 5 are stepped up by one pitch of the test tubes arranged in a rack, which will be described later, as shown in FIG. While the holder 5 is moved to a position immediately above a drain groove described later, the holder 5 is stopped on the drain groove corresponding to the sorting step when the sorting is stopped in the sorting process, and is normally stopped at the original position of the drain groove base end. .

In this case, when the drain piece as in the embodiment is not used, that is, when the fraction of the target component and the drain are performed via the solenoid valve, the arm 4 and the tube holder 5 are connected to the arm 4 and the tube holder 5 by, for example, FIG. As described above, the test tubes can be continuously moved in the order of arrangement.

On the other hand, on the lower part of the front plate 2, there are provided a pair of hooks 16 projectingly screwed and fixed, and a tray 17 made of a stainless steel plate is hooked on the hooks 16, 16. The tray 17 is formed in a horizontally long box shape as shown in FIG. 4, and one of its peripheral walls is provided with tongue pieces 18, 18, and a through hole 19 formed in the tongue piece 18 is attached to the hook 16. Is inserted into.

A rack 20 is accommodated in the tray 17, and the rack 20 is integrally molded with a chemical resistant synthetic resin, and a plurality of partition plates 22, 23, 24 are provided on support pieces 21, 21 erected on both sides thereof. A plurality of through holes 26, 27 which are erected in the up and down position and into which a test tube 25 which is a component collecting container can be inserted, and a plurality of locking holes 28 which can lock the bottom of the tube 25 are provided. .

An opening 29 through which a drain tube described later can be led out is formed at the middle height position of the supporting pieces 21, 21, and gripping pieces 30, 30 are formed on the upper part of the supporting piece 21, 21 by bending the upper ends of the supporting pieces 21, 21 outward. Has been done. In the figure, 31 is a leg piece protruding from the lower surface of the tray 17,
Reference numeral 32 is a pin that stands upright on the bottom of the tray 17, and can be inserted into a locking hole 33 formed in the partition plate 24.

An elongated drain piece 34 is accommodated on the partition plate 22,
The piece 34 is made of, for example, a chemically resistant synthetic resin and is molded into a substantially key-shaped gutter shape, which is a long and linear main piece.
34a and a short projecting piece 34b projecting at a right angle from one end of the piece 34a, and engaging projections 35, 36 that can be inserted into the through holes 26 are projectingly provided at respective one ends of their lower surfaces. There is.

Drain grooves 37, 38 communicating with each other on the pieces 34a, 34b.
And the bottoms of these grooves 37, 38 are shown in FIGS.
As shown in the figure, it is formed into a gentle concave curved surface or a V-shaped surface, and these are gradually formed deeper toward the intersection, and a minute groove width is formed at the bottom of one of the drain grooves 37. A plurality of forced flow grooves 39 are formed along the length direction.

A drain hole 40 is provided at the intersection of the drain grooves 37 and 38, and a screw portion 41 is formed on the inner peripheral surface thereof, and an adapter 42 is screwed into the screw portion 41. adapter
42 is made of a synthetic resin cylinder and has a stepped hole 43 inside.
Is formed, and a tubular adapter piece 44 having a substantially hoof shape is housed on the step portion 43a.

The adapter piece 44 is installed such that the upper end of the oblique cut portion 44a faces the opening of the drain hole 40, for example, and the through hole 45 communicates with the stepped hole 43. In the figure, 46 is the adapter piece 44.
One end of a drain tube 47 communicating with a drain container (not shown) can be attached by a screw portion provided on the lower peripheral surface of the.

Although the adapter 42 is configured separately from the drain piece 34 in this embodiment, they may be integrally molded,
Although the adapter piece 44 is also formed separately from the adapter 42 and the drain piece 34, it can be integrally molded with the adapter 42 or can be integrally molded with the drain piece 34. Further, in addition to the drain groove 37, a flow promoting groove having the same purpose as the flow promoting groove 39 may be provided at the bottom of the drain groove 38.

(Operation) The drain piece thus configured can be easily manufactured by molding with a synthetic resin or the like, and when this drain piece 34 is used together with the fraction collector 1, it is installed at a predetermined position. That is, first of all, the hooks 16, 16 projectingly provided on the lower portion of the front plate 2 of the collector 1,
The through hole 19 of the tongue piece 18 is inserted and the tray 17 is hooked, and the rack 20 accommodating a predetermined amount of test tubes 25 is accommodated in the tray 17.

The test tube 25 has a desired through hole depending on the position for collecting the target component.
Although accommodated in 26, 27 and the retaining hole 28 and various arrangements can be selected, in that case, a space for one row of the test tubes 25 along the length direction of the rack 20 necessary for accommodating the main piece 34a,
A space for one test tube 25 adjacent to one side of the fraction collector 1 from one end of the empty space required for accommodating the overhanging piece 34b is secured as an empty space.

When the test tube 25 is thus arranged at the predetermined position, the drain piece 34 is housed on the partition plate 22 in the empty space of the test tube 25, and the engaging projections 35 and 36 are provided at both ends of the empty space. Insert into the holes 26, 26 and attach the drain piece 34.

Also, before and after installing the drain piece 34,
Is screwed into the screw hole 41 from below the drain hole 40, and one end of the drain tube 47 is screwed into the screw portion 46,
Inside the stepped hole 43 of the adapter 42, the beveled part of the adapter piece 44
By accommodating 44a toward the drain groove 37, for example, a series of installation work is completed.

On the other hand, in the fraction collector 1, the arm 4 is always stationary at the end of the opening window 3 as shown in FIG. 1, and the tube holder 5 attached to one side of the arm 4 is located immediately in front of the front plate 2. The drain hole of the conduit 6 held in the
It is located directly above 40.

When the fraction collector 1 is activated under such a circumstance, the arm 4 and the tube holder 5 are driven based on a predetermined parameter input, of which the arm 4 moves right and left along the opening window 3 to the front of the collector 1. And the tube holder 5 moves back and forth along the length direction of the arm 4.

In this case, when the arm 4 is moved, the tube holder 5 moves after returning to the position directly above the drain groove 37, so that the drip liquid from the conduit 6 is reliably stored in the drain groove 37 and is scattered around the rack 20. Therefore, the surrounding area is not polluted. Further, when the tube holder 5 is moved, the holder 5 is moved forward by one pitch of the test tube 25 around the drain groove 37, and after the sorting, as shown by an arrow in FIG. Since it moves and returns to above the drain groove 37, the component concerned is not fractionated or mixed in the other test tube 25.

On the other hand, the unnecessary liquid stored in the drain grooves 37, 38 is
It flows down due to the gradient of the bottom of 38, is guided to the drain tube 47 through the drain hole 40 located at the intersection thereof, and is accommodated in the drain container (not shown).

In this case, since a plurality of forced flow grooves 39 are formed from one end to the drain hole 40 at the bottom of the drain groove 37 where most of the unnecessary liquid drops, the unnecessary liquid is contained in each of these grooves 39. They are separately stored, and this forms a flow state different from the total flow of unnecessary liquid depending on the flow path of each groove 39.

That is, in a normal preparative process in which the amount of unnecessary liquid per unit time does not overflow from each groove 39, and therefore under a situation where the amount of preparative liquid per unit time is very small, the unnecessary liquid contacts the pipe wall. The length of the portion that is shown, that is, the wetting edge is smaller than that of a conventional drain piece in which the entire amount of the unnecessary liquid that does not have the flow promoting groove 39 flows, and the average fluid depth obtained by dividing the cross-sectional area of the flow by the wetting edge is Since it becomes large, the flow of the unnecessary liquid in each groove 39 is promoted, which is suitable for discharging the unnecessary liquid having a large viscosity.

Even when the amount of unnecessary liquid per unit time overflows from the grooves 39, the bottom of the drain groove 37 has a gentle concave curved surface or V-shape, and further, the above-mentioned flow promoting groove is formed at the center of the portion. Since 39 is formed, the average depth of the fluid is increased, so that the flow velocity of the unnecessary liquid is increased and the discharge thereof is promoted. Therefore, the unnecessary liquid does not stagnant or stay in the drain groove 37.

On the other hand, in this way, the unnecessary liquid in the drain grooves 37 and 38 is drained by the drain hole
Through the hole 40 through the adapter piece 44
While flowing down to 45, the formation of the liquid film is prevented by the beveled portion 44a of the piece 44 at that time.

That is, the opening area of the slanted portion 44a is much larger than that of the drain hole 40, and a very large surface energy is required to form a liquid film of unnecessary liquid in the portion 44a. Formation is prevented. Therefore, the unnecessary liquid smoothly flows from the drain hole 40 to the through hole 45, and the congestion and the retention at the relevant portion are prevented.

In this way, when the predetermined amount of the target component has been collected in the predetermined test tube 25, the collection is temporarily stopped and the test tube 25
Is replaced with a new test tube 25 or the drain piece 34 is repositioned, so that the next fractionation can be performed.

When using a solenoid valve for sorting, use the drain piece 34
Is no longer needed, in which case the drain piece 34 can be
It can be quickly dealt with by removing it from the screw part 42 and the engaging projection
This can be easily done by simply pulling out 35, 36 from the through hole 26.

As described above, in the present invention, by installing the drain piece 34 on the rack 20 and selecting and transferring the position thereof appropriately, it is possible to obtain various sorting patterns and to use the solenoid valve. It is designed so that it can be easily collected.

(Effects of the Invention) As described above, the liquid collection drain piece of the present invention has a flow-promoting groove having a minute width capable of accommodating a minute amount of unnecessary liquid formed at the bottom of the drain groove and communicating the groove with the drain hole. As a result, the flow of the unnecessary liquid is promoted, the congestion and retention of the unnecessary liquid can be prevented, and the unnecessary liquid can be smoothly discharged.

Further, according to the present invention, the lower surface of the drain piece is provided with an engaging projection that can be fitted into the through hole for accommodating the collection container of the rack, so that the drain piece can be installed at a desired position on the rack.
A variety of sorting patterns can be obtained, and there is a practical effect that, for example, when sorting by a fraction collector, it can be easily used depending on the sorting format of the collector.

[Brief description of drawings]

FIG. 1 is a perspective view showing the appearance of a fraction collector using the present invention, FIG. 2 is a sectional view showing the internal structure of the collector, FIG. 3 is a plan view of the main part of FIG. 1, and FIG. FIG. 5 is an exploded perspective view showing a tray and a rack, and a drain piece and an adapter piece applied to the present invention, FIG. 5 is a perspective view showing an embodiment of the present invention, and FIG. 6 is AA 'in FIG.
7 is a sectional view taken along line BB 'in FIG. 5, FIG. 8 is a sectional view taken along line CC' in FIG. 5, and FIG.
The figure is an enlarged cross-sectional view showing the mounting condition of the adapter and the adapter piece applied to the present invention, FIG. 10 is a perspective view showing an example of the adapter piece, and FIG. 11 is a plan view of the rack when the drain piece is not used. An example of sorting in this case is shown by an arrow. 20 ... Rack, 25 ... Collection container, 26 ... Through hole, 34 ... Drain piece, 35, 36 ... Engaging projection, 37, 38 ... Drain groove, 39 ... Acceleration groove,
40 ... Drain hole

Claims (1)

[Scope of utility model registration request] 1. A drain piece for liquid fractionation in which a drain hole is formed at the bottom of a drain groove capable of accommodating unnecessary liquid, wherein a flow-promoting groove having a minute width capable of accommodating a minute amount of unnecessary liquid is provided at the bottom of the drain groove. Forming and communicating the groove with the drain hole,
A drain piece for liquid fractionation, characterized in that an engaging projection that can be fitted into a through hole for accommodating a collection container of a rack is provided on a lower surface of the drain piece.