JPH07194Y2 - Balance correction device in centrifuge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a balance correction device for a centrifugal separator that separates blood into serum and blood pay.

[Prior art and its problems]

As is well known, when performing various blood tests such as biochemical analysis and immunological analysis, the blood is centrifuged as a pretreatment, but when setting a blood collection tube in the centrifuge. It is difficult to obtain a uniform centrifugal treatment effect unless each blood collection tube containing the collected blood is set in the rotor of the centrifuge through acquisition while considering the rotation balance. Further, there is a problem that the rotation of the rotor becomes non-uniform, which is dangerous.

The present invention was devised in view of such a current situation, and the purpose thereof is to automatically correct the weight balance at the symmetrical position of the rack basket in which the blood collection tube is set. An object of the present invention is to provide a balance correction device in a centrifuge, which can easily obtain a uniform centrifugal treatment result in the centrifuge, is easy to handle, and is safe.

[Means for solving problems]

In order to achieve the above object, the present invention comprises a rotor having a plurality of rack baskets for holding blood collection tubes, and a drive device for centrifugally rotating the rotors at a predetermined speed. A balance correction device provided in a centrifugal separator, the balance correction device being provided at a position symmetrical to the piezoelectric element provided at each rack basket attachment position of the rotor and the roller. It comprises a control device for comparing the output difference from the piezoelectric element and a weight correction device for supplying a fluid or a weight to the rack basket to correct the weight balance at the symmetrical position of the rack basket. Based on the output difference of the elements, the operation of the weight compensating device is controlled so that the weight difference between the rack baskets at symmetrical positions becomes "0". The one in which the features.

[Action]

Therefore, in the balance correction device for a centrifuge according to the present invention, in order to automatically correct the weight balance at the symmetrical position of the rack basket in which the blood collection tube is set, the piezoelectric element is provided at each rack basket arrangement position. Are arranged, the output differences from the piezoelectric elements arranged at symmetrical positions of the rotor are compared, and the weight correction means is operated so that the weights of the two are the same. Is.

〔Example〕

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

As shown in FIG. 1, a centrifugal separator A according to this embodiment includes a disk-shaped rotor 1 and a plurality of rack baskets 2 axially supported at predetermined intervals along each circumferential direction of the rotor 1. A drive device 3 for controlling the rotation of the rotor 1 at a predetermined high speed, a rack 5 that holds a required number of blood collection tubes p and is inserted into and removed from the rack basket 2, and a weight of the rack basket. And a weight correction device 6 for correcting

The rotor 1 is a drive device 3 including a pulse motor or the like.
Is fixed to the rotary shaft of the rack basket 2, and the rack basket 2 is rotated around the outer peripheral edge thereof at a predetermined interval via a pair of arms 7 (only one is shown in the drawing) as described above. It is movably supported.

One end of the arm 7 is rotatably supported by the basket storage portion 1a of the rotor 1 via a shaft 8, and the other end is supported by the body of the rack basket 2 via a shaft 9. It is rotatably supported.

As shown in FIG. 2, the rack basket 2 is formed to have a substantially concave cross section, and the rack 5 is configured to be inserted into and removed from the upper opening of the rack basket 2.

Further, the rack basket 2 has a cross section L for storing water supplied by a weight correction device 6 described later.
A letter-shaped reservoir 10 is formed. Of course, although not shown in the drawings, when the rack 5 is mounted on the rack basket 2, the rack 5 is automatically prevented from falling off from the rack basket 2 during a centrifugal operation by, for example, a locking body so that the rack 5 does not fall off. Locked in.

The drive device 3 is composed of, for example, various known motors such as a pulse motor that can achieve stable rotation.

As described above, the rack 5 holds a required number of blood collection tubes p, and is configured to have an outer shape to be housed in the rack basket 2, and the blood collection tubes p are housed therein. A required number of bottomed holding holes (not shown) having an outer shape are opened. Although not shown, when the rack 5 holding the blood collection tube p is held in the rack basket 2, the lid body may be covered to surely prevent the blood collection tube p from falling off. it can.

The weight correction device 6 is a basket storage part of the rotor 1.
It is composed of a piezoelectric element 11 arranged in 1a, and a suction / drainage device 12 that operates based on the output from the piezoelectric element 11.

For the piezoelectric element 11, for example, various known pressure sensors such as a silicon diaphragm type measurement pressure sensor to which a piezoresistive effect is applied can be applied.

The output from the piezoelectric element 11 configured in this way is compared with the output from the piezoelectric element (not shown) arranged on the symmetrical side of the rotor 1 by the controller (not shown), and the controller After that, the suction / drainage device 12 is operated based on the compared data to supply or drain the water to or from the storage portion 10, and the rack basket 2 (of course, this rack) at the symmetrical position of the rotor 1 The rack 5 in which the blood collection tube p is erected is housed in the basket 2. The correction control is performed so that the weights of the racks 5 are balanced.

As shown in FIG. 1, the suction / drainage device 12 includes a water bottle 13
And a pump 14 for supplying a required amount of water from the water supply bottle 13 to the reservoir 10 of the basket 2 or for draining the water in the reservoir 10, and a pump 14 interposed between the water bottle 13 and the pump 14. And a switching valve 15 provided. The first
Reference numeral 16 in the figure denotes a pipette which is guided up and down by a lifting device (not shown).

In each of the above embodiments, the case where a liquid such as water is used as the weight correction means has been described as an example, but the present invention is not limited to this, and for example, a fine powder body such as sand or Weight can be corrected by using a weight member or the like.

[Effect of device]

As described above, according to this invention, the piezoelectric elements are arranged at the respective rack basket arrangement positions, the output differences from the piezoelectric elements arranged at the symmetrical positions of the rotor are compared, and the weights of the two agree. Since the weight correcting means is operated so as to operate, the weight balance at the symmetrical position of the rack basket in which the blood collection tube is set can be automatically corrected, and as a result, in the centrifugal separator of this type. Centrifugal treatment can be easily homogenized, and the rotor can be stably rotated, so it is safe, and since the configuration is simple, it can be provided at a low price.
It has many excellent effects.

[Explanation of symbols]

 A ... Centrifuge, p ... Blood collection tube 1 ... Rotor, 2 ... Rack basket 5 ... Rack, 6 ... Weight correction device 11 ... Piezoelectric element, 12 ... Suction / drainage device

Claims (1)

[Scope of utility model registration request] 1. A centrifugal separator comprising a rotor having a plurality of rack baskets for holding blood collection tubes, and a drive device for centrifugally rotating the rotor at a predetermined speed. The balance correction device compares the output difference between the piezoelectric element arranged at each rack basket mounting position of the rotor and the piezoelectric element arranged at the symmetrical position of the rotor. It comprises a control device and a weight correction device for supplying a fluid or a weight to the rack basket to correct the weight balance at the symmetrical position of the rack basket. The weight correction device is arranged at the symmetrical position based on the output difference of each piezoelectric element. A balance correction device in a centrifuge, wherein the operation of the weight correction device is controlled so that the weight difference between certain rack baskets becomes "0".