JPS6075323A - Stirring device - Google Patents

Abstract

PURPOSE:To prevent deterioration of function of a stirring device due to sticking of specimen to a stirring body or by scattering of washing water by controlling a stirring body for mixing the specimen and reagent in a biological or immunological automatic analyzer so as to operate only when the stirring body is in a position requiring rotation. CONSTITUTION:Three stirring bodies 2 are provided to a turret-like holder 4 guided for vertical movement by an actuator 3 at a specified distance, rotated and transferred by a motor 5 to positions (a)-(c) for stirring, washing, and waiting, and are guided downward at each position. Here, the bottom end of the stirring part of the stirring body 2 is dipped in the specimen in a reaction tube 6 or in the washing water in a washing vessel 7, and stopped. Then, a movable junction Sw1 on the rear surface of the holder 4 contacts with a fixed junction Sw2 at a fixed position of the apparatus to cause simultaneous rotation of motor of each stirring body 2; thus, the stirring body 2 at the position (a) rotates to stir the specimen, etc. in the tube 6. The stirring body 2 at the position (b) is rotated in the washing water 8 and is washed, but the stirring body 2 at the position (c) performs only rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a stirring device suitable for an automatic analyzer that performs all biochemical analysis or immunological analysis.

(Prior Art) As is well known, most automatic analyzers of this type are equipped with a stirring device for the purpose of homogenizing the reaction between the specimen and the reagent.

Due to the purpose of the above-mentioned arrangement, this stirring device rotates the stirring body to stir the sample, etc. in each reaction tube transferred at a predetermined stirring position at the required timing, and after that, the sample, etc. adheres to it. In order to clean the stirred body at the cleaning position, the stirring body is transported back and forth between the stirring position and the cleaning position at a rate of 4%. From the body stirring position to the washing position t'! Since the agitator is configured to rotate even during transfer, specimens and washing water adhering to the agitator are scattered around due to the centrifugal force caused by the rotation of the agitator. It had a problem.

(Purpose of the Invention) The present invention was devised in view of the current situation, and its purpose is to insert a sample into a reaction tube to mix a sample and a reagent in the reaction tube, and to rotate the reaction tube. By controlling the rotation of the stirrer that mixes the sample only when the stirrer is in the position where it should be rotated, the sample and washing water that adhere to the stirrer are scattered around the stirrer, allowing automatic analysis. It is an object of the present invention to provide a stirring device that does not cause any risk of impairing the functions of the device.

(Structure of the Invention) In order to achieve the above object, the present invention provides an agitation device configured to transport an agitation body that has completed its agitation operation at a predetermined position to a cleaning position and wash the agitation body. The rotational drive is controlled so that it is activated only when the holder holding the stirring body is lowered and stopped so that the stirring body is inserted into each container at the stirring position and the cleaning position. be.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

(Example) As shown in FIG. 1, three direct-acting stirrers 2 are placed at a predetermined stirring position a in a reaction tube transfer path 1 containing samples, reagents, etc.
are arranged so that they can be transferred at the appropriate timing and perform the required work.

That is, the stirring body 2 is a talent-shaped holder 4 that can be guided up and down by an actuator 3, as shown in FIG.
Three stirring bodies 2 are arranged at required intervals (120° in the illustrated embodiment), and these stirring bodies 2 can be rotated and transferred to the stirring position a1 to the cleaning position and the standby position C via the motor 5. At each of the same positions a, b, and c, the actuators 3 are jointly guided downward from the moon dust position to the solid line position as shown by the imaginary line in Fig. 2, and as a result,! 7. The lower end stirring part 2a of the stirring body 2 is immersed in the sample 9 of the reaction tube 6 or the washing water 8 of the washing container 7. At this time, each motor 2 of each stirring body 2
Since the current supply to b is shielded, the lower end stirring part 2a is inserted into the reaction tube 6 and the washing container 7 without rotating.

In this way, when each stirring body 2 descends to the lowest position and stops, the movable contact SWI disposed below the holder 4 comes into contact with the fixed contact Sw2 disposed at the l control part of the device. The motors 2b of the valley stirring bodies 2 rotate simultaneously, and each stirring body 2 at the stirring position a circularly stirs the sample 9 in the reaction tube 6, and the stirring body 2 at the washing position bK rotates the sample 9 in the washing water 8. It is rotated and cleaned. At the standby position CK, some stirring bodies 2 only rotate.

After the required time has elapsed, the holder 4 is guided upward via the actuator 3, and the lower end stirring part 2a of the valley stirring body 2 is not in contact with the upper ends of the reaction tube 6 and the washing container 7, that is, the stirring body 2 Position 1 that does not impede the rotation of
By the way, the upward motion of Holgu 2 stops. When the holder 4 starts its full upward movement in this way, the movable contacts Sw1 and II! Since the contact state of 11 constant contact SW2 is released, the rotation of each motor 2b is immediately stopped, so that the specimen 9 stuck to the stirring part 2a at the lower end of the stirring body 20 and the washing water 8 are scattered around by centrifugal force. It will not scatter.

When the holder 4 stops rising in this way, the motor 5 starts operating and the holder 4 rotates by H[foot angle (120° in the illustrated example) to reach the rear stirring position fa/C stirring body. 2
is the cleaning position b1, the stirring body 2 that was in the cleaning position reaches the long machine position C, and the stirring body 2 that was in the standby position C moves to the stirring position a.
After the motor 5 has been transferred up to this point, the motor 5 stops rotating.

Thereafter, the above operations are repeated at the required time and timing, so that the stirring and cleaning operations are performed continuously.

In the above embodiment, the case where three actuators are used in the elevating mechanism of the holder 4 was explained as an example, but this invention
It is not necessarily limited to this, for example, 71+
Appropriate known elevating guide mechanisms such as A structure can also be applied.

Furthermore, in the above embodiments, all cases were explained in which three A stirring bodies 2 were disposed, but the present invention is not limited to this, and a plurality of agitators 2 may be disposed, and a plurality of cleaning positions may be provided. It is also possible to improve cleaning accuracy.

Since this invention includes the above-mentioned configuration, stirring work can be carried out continuously, and it is possible to prevent the specimen, etc. and washing water attached to the stirring body from scattering around due to the centrifugal force caused by the rotation of the stirring body. By preventing this, the reliability of the functions of the automatic analyzer can be maintained for a long time.

[Brief explanation of drawings]

The drawings show a stirring device according to an embodiment of the present invention, and FIG. 1 shows a detailed explanation of the arrangement of the device.
, ε1 and 2 are explanatory front views showing the sweeping operation of the same device. ■...Transfer route 2...Agitator 3...Actuator 4...Holder 5...Motor 6...Reaction tube 7...Washing container Swl...Movable contact SW2...
Fixed contact a...Agitation position b...Cleaning position Patent applicant Kuchimoto Tektron Co., Ltd.-1/Nonagi 2nd Nagi

Claims (1)

[Scope of Claims] In an agitation device configured to transfer the agitation body after completing agitation work at a predetermined position to a full cleaning position for cleaning, the rotational drive of the agitation body is carried out when the agitation body is in the agitation position and the cleaning position. A stirring device characterized in that the stirring device is driven and controlled so as to be operated only when a holder holding the stirring body to be inserted into each container PJ is lowered and stopped.