JP2570574Y2 - centrifuge - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention has a plurality of racks capable of holding a plurality of test tubes containing a sample, and a plurality of buckets which can move from a vertical direction to a horizontal direction by centrifugal force when the rotor rotates. It relates to a centrifuge.

[0002]

2. Description of the Related Art When blood or the like is centrifuged, a test tube containing a sample is installed in a rack to prevent infection of a person operating the centrifuge with a virus or the like. An automatic centrifuge is used in which a rack is inserted into a centrifuge and the rack is removed after centrifugation. Generally, since blood and the like need to be separated into each component after centrifugation, a swing rotor that can move in a horizontal direction by centrifugal force is used for a bucket mounted on the rotor so that a separation surface is formed horizontally in a test tube. . As shown in FIG.
The structure is such that the bucket 5 hangs between the upper two pins 4 and can rotate freely.

[0003]

[Challenges devised to solve the above for a conventional centrifuge Russia
Since the bucket 3 of the rotor 3 rotates freely in the horizontal direction due to centrifugal force, a slight gap is required between the end face of the pin 4 and the side face of the bucket 5. If there is no gap, foreign matter such as blood or dust adheres between the pin 4 and the bucket 5, and the friction between the pin 4 and the bucket 5 increases due to deformation of the bucket 5 by centrifugal force. the bucket 5 is also rotated is stopped will not return from horizontal to vertical, or spills sample contained in a test tube, is because after centrifugation robot had problems such as not eject rack. However, conversely, if there is such an interval, the bucket 5 moves freely by the interval on the rotor 3 and its position is not constant, so that the robot cannot accurately insert or remove the rack 7 from the bucket 5. there were.

[0004] Conventionally, for example, Japanese Utility Model Application Laid-Open No. Sho 56-4234.
As shown in No. 6, a pin that rotatably supports the bucket
A configuration is proposed in which the rotor itself can be freely advanced and retracted from the rotor by a spring.
However, in such a configuration, the pins
A small gap between the pin and the rotor
It becomes important. This pin holds the bucket and bag during centrifugation.
Since the centrifugal force of all samples placed in the
This gap is crushed by this centrifugal force, and the pin
It is difficult to ensure smooth operation by biting
Had the problem that

[0005] The present invention overcomes the above-mentioned problems, and
The bucket is always in a fixed position and always smooth
It is an object to provide a centrifuge that operates.

[0006]

An object of the present invention is to provide a centrifuge.
Of at least one of the two pins of the rotor
A cavity parallel to the axial direction of the pin is provided in the cavity.
Can be moved in the axial direction and one end is pressed by a spring
By providing a piece whose other end protrudes outside the pin
This can be solved by doing so.

[0007]

In the rotor for the centrifugal separator constructed as described above, the spring always presses the bucket via the piece in the convex direction of the pin on the other side. Can be held. In addition, overload related to pins
(Centrifugation of the bucket and all samples placed in the bucket
Force) is received by the pin itself fixed to the rotor.
There is no need to provide a gap between the rotors,
The problem goes away.

[0008]

FIG. 1 shows an automatic centrifuge rotor according to the present invention.
Perspective view showing an embodiment of when the embodiment in mind separator (partially sectional view) der is, FIG. 2 is Kazumi the centrifuge rotor of the present invention
It is a longitudinal section showing an example.

First, according to FIG. 1, the present invention is applied to an automatic centrifuge.
The overall movement in the case will be described. The test tube 6 containing the sample is placed in a rack 7 and placed in a rack storage area 8. When the automatic centrifuge is operated, the robot mechanism 9 moves up to the rack 7 to grasp the rack 7 and insert it into the bucket 5. When the rack 7 is put in the bucket 5, the motor 1 rotates and the sample is centrifuged. When the rotation of the motor 1 is stopped after the centrifugation, the robot mechanism 9 moves on the bucket 5, takes out the rack 7 in the bucket 5, and places it in another rack place 8.

Next, the centrifugal separator according to the present invention is shown in FIG.
The rotor for use will be described.

FIG. 2 is a longitudinal sectional view of the rotor 3 in a plane perpendicular to the center of the pin 4. The bucket 5 receives a force of a spring 12 installed in one of the pins 4 via a piece 11. It is pressed against the projection of the other pin 4.

For example, four buckets 5 are distant from the rotor 3.
Attached to be able to swing by heart. Bucket 5
Is provided with two shoulders 5a, and this shoulder 5a
Hang on the two pins 4 and 4 fixed to the rotor 3 without gaps
Have been. One pin 4 (pin located in the left direction in the figure)
The projection 4a is provided at the center of the end face of the bucket 5 side.
And the other pin 4 (pin located rightward in the figure).
) Is inside the pin 4 in the axial direction (horizontal direction in the figure).
A cavity 14 is provided in parallel, and an axis is provided in the cavity 14.
The tip is outside the pin 4 (left side in the figure)
The piece 11 configured to be able to protrude is disposed.
A spring 12 is provided at the rear end (right side in the figure) of the pin 4.
The lid 13 is pinned to hold down the spring 12
4 screwed.

With this configuration, centrifugal rotation
Of the bucket 5 inside and the sample etc. contained in the bucket 5
The heart force is received by the pin 4 fixed to the rotor 3 and the piece 11
Since the centrifugal force does not work, the movement of the piece 14
It can be done smoothly.

Note that the bucket always makes point contact with the convex portion of the pin.
Contact area is small enough
Because it is small, it can rotate freely and finish centrifugation.
Later, the bucket tilted due to the friction between the pin and the bucket
It will not stop in a state (state that does not return to its original state)
You. Also, even if the bucket is deformed by centrifugal force, the spring will
自 自 自 自 自 な く 自 自
Free rotation can be maintained.

[0015]

[Effects of the Invention] According to the present invention, the conventional problems are solved,
The bucket is always in a fixed position with respect to the rotor, and
Can provide a centrifuge that always works smoothly
You.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a rotor for a centrifuge according to the present invention.
FIG. 2 is a partial cross-sectional perspective view showing an example in which is adopted in an automatic centrifuge.

FIG. 2 is a longitudinal sectional view showing an embodiment of the rotor of the present invention.

FIG. 3 is a longitudinal sectional view showing an example of a conventional rotor.

[Explanation of symbols]

1 is a motor, 2 is a rotating shaft, 3 is a rotor, 4 is a pin , 4a
Is a protrusion , 5 is a bucket , 5a is a shoulder , 6 is a test tube, 7 is a rack, 8 is a rack storage, 9 is a robot mechanism, 10 is a control unit, 11 is a piece, 12 is a spring, 13 is a lid , 14 Is
It is a cavity .

Claims (1)

(57) [Scope of request for utility model registration] A rotor that is rotated by 1. A motor, said b
A pin fixed to the rotor, a plurality of buckets rotatably mounted on the pin, and capable of moving from a vertical direction to a horizontal direction by centrifugal force when the rotor rotates, and mounted on the bucket.
Is, in a centrifuge having a plurality of racks which can be a plurality of holding the test tube containing the sample, the interior of the pin
An axially parallel cavity for the pin is provided, and the pin is inserted into the cavity.
Can be moved in the axial direction of the
By providing a piece whose other end protrudes outside the pin
A centrifuge, characterized in that: