JPH0355101Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a liquid dispensing device, and in particular, when dispensing aspirated liquid into another container, the other container is closed with a lid. The present invention relates to a liquid dispensing device suitable for use in analytical devices.

[Conventional technology]

Conventional liquid dispensing devices generally include an arm with one end supported by a shaft, a pipette disposed at the other end of the arm, and a pipette connected to the pipette to aspirate a required amount of liquid into a reaction tube. It is composed of a sampling pump for discharging water, and a drive device for controlling the rotation of the arm from the liquid suction position to the liquid dispensing position and controlling the arm to move up and down at each position.

[Problem that the invention attempts to solve]

However, such conventional liquid dispensing devices have been sufficient for automatic analyzers in which the upper part of the reaction tube is simply open; In such cases, due to safety considerations,
The lid attached to the casing housing the rotor must be attached and detached each time a liquid is dispensed, which is a cumbersome task and also hinders the full automation of this type of automatic analyzer. The problem was that it was caused by

[Configuration and action to solve problems]

This invention was devised in view of the current situation, and its purpose is to be particularly suitable for automatic analyzers in which the reaction tube is held in a rotor, etc. that rotates at high speed. The present invention aims to provide a liquid dispensing device with a simple configuration that enables full automation of an automatic analyzer.

In order to achieve the above object, in this invention, a liquid dispensing device includes a casing in which a rotating rotor for holding a reaction tube is housed, a lid body attached to an upper opening of the casing, An opening/closing body that is rotatable in the inward opening direction and is attached to the lower peripheral edge of the hole opened in the lid, a pipette that dispenses a liquid into the reaction tube, and a pressing body that moves up and down together with the pipette.
The present invention is characterized in that the lower end of the pressing body is formed longer downwardly than the lower end of the pipette.

〔Example〕

Hereinafter, this invention will be explained in detail based on an embodiment shown in the accompanying drawings.

As shown in FIGS. 1 and 2, the liquid dispensing device 81 according to this embodiment includes a casing 11 in which a rotating rotor 20 for holding a reaction tube 1 is housed, and a casing 11.
a lid 12 attached to the upper opening of the lid 1;
an opening/closing body 15 that is rotatable in the inward opening direction and is attached to the lower peripheral edge of the hole 16 opened in the hole 2;
A pipette 83 disposed at the other end, a sampling pump (not shown) which is connected to the pipette 83 and aspirates a required amount of the serum to be tested and discharges it into the reaction tube 1, and the arm 82 is positioned at the sample suction position. a drive device 84 that controls rotation at a predetermined timing around an axis from a to a serum dispensing position b and further to a washing position c, and controls raising and lowering at each position; It consists of a pressing body 85 that is longer than the pipette 83 and presses to open and close an opening/closing body 15 of the lid body 12, which will be described later.

The liquid dispensing device 81 includes a sample transfer device 8 that intermittently transfers each sample container 9 sequentially to the sample suction position a via a drive device (not shown).
The drive is controlled in synchronization with the drive of 0. Of course, this sample container 9 contains the liquid to be measured (hereinafter referred to as
This is called the test serum. ) is accommodated in the required amount.

Further, a serum suction device 90 configured similarly to the liquid dispensing device 81 is configured such that the arm is controlled to rotate from a serum suction position d to a washing position e at a predetermined timing. Incidentally, the reference numeral 100 in FIG. 1 is an optical measuring device.

This method of measuring the test serum is similar to known methods, in which the suction system is filled with water, the test serum and water are separated through air, and then the test serum is measured by suction. After that, the inside of the pipette 83 is washed by passing washing water from inside.
During this cleaning, the pipette 83 is of course set at the pipette cleaning position c. The pipette 83 is equipped with a suction amount confirmation device (not shown) having a known configuration for checking the amount of sample serum taken up. is detected, and if the amount of serum to be tested is insufficient, this is automatically corrected.

The opening/closing body 15, which is opened and closed via the pressing body 85 of the liquid dispensing device 81 configured in this manner, is disposed on the lid body 12 of the casing 11 in which the rotor 20 for holding the reaction tube 1, etc. is housed. has been done.

As shown in FIG. 2, this lid body 12 has a hole 16 opened so that the axis of each reaction tube 1 held by the rotor 20 coincides with the hole axis. The holes 16 are formed in a loop shape corresponding to the number of the reaction tubes 1, and holes 16 are formed on the bottom surface of the lid body 12 at the locations where the holes 16 are formed.
The opening/closing body 15 is arranged in a loop shape. The opening/closing body 15 includes a plate 17 that closes the hole 16, a shaft 18 that rotatably supports the plate 17 in an inward opening direction, and a shaft 18 that normally attaches the plate 17 in a direction that closes the hole 16. spring 1
It consists of 9 and.

Therefore, when the test serum is dispensed into the reaction tube 1, the arm 82 transferred to the serum dispensing position b
starts to descend at the same position, and along with this, the pipette 83 and the pressing body 85 are inserted into the hole 16. At this time, since the pressing body 85 is longer than the pipette 83, first, the lower end of the pressing body 85 is connected to the plate 1.
7 and when the arm 82 further descends, the plate body 17 is pressed by the pressing body 85 and rotates against the biasing force of the spring 19 as shown by the imaginary line in FIG. Since the pipette hole 16 is set and held in an open state, the pipette 83 is set directly above the reaction tube 1, so that the required amount of test serum is dispensed from the pipette 83 into the reaction tube 1.

As shown in FIG. 2, the rotor 20 is formed into a disk shape, and a required number of substantially concave planar holding holes are formed at predetermined intervals along the outer circumferential direction of the rotor 20.
A holder 24 rotatably supported via a shaft 23 is disposed in each of these holding holes, and the reaction tube 1 is
It is fitted and held in this holder 24. Of course, the rotor 20 is centrifugally rotated (eg, 2000 rpm, 5 minutes) by a drive device (not shown), and operates to separate the reaction liquid in the reaction tube 1 into serum and blood clots.

[Effect of idea]

Since the liquid dispensing device according to this invention is configured as described above, it is particularly suitable for automatic analyzers in which the reaction tube is held in a rotor or the like that rotates at high speed. In addition to being able to fully automate the automatic analyzer, the configuration is simple and can be provided at a low price.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the arrangement of a liquid dispensing device according to an embodiment of the invention, and FIG. 2 is a partially cutaway sectional view showing the configuration of the main parts of the liquid dispensing device. . Explanation of symbols, 11... Housing, 12... Lid, 1
5... Opening/closing body, 16... Hole in lid body, 17... Plate body, 18... Shaft, 19... Spring, 81...
Liquid dispensing device, 82... arm, 83... pipette, 84... drive device, 85... pressing body.

Claims (1)

[Scope of utility model registration request] A housing that houses a rotating rotor that holds a reaction tube, a lid that is attached to the upper opening of the housing, and a lid that opens inward and is attached to the lower peripheral edge of a hole in the lid. The structure includes a rotatable opening/closing body, a pipette for dispensing liquid into the reaction tube, and a pressing body that moves up and down together with the pipette, and the lower end of the pressing body is connected to the lower end of the pipette. 1. A liquid dispensing device characterized in that the device is formed longer downward than the section.