JPH0148823B2 - - Google Patents
Info
- Publication number
- JPH0148823B2 JPH0148823B2 JP24876283A JP24876283A JPH0148823B2 JP H0148823 B2 JPH0148823 B2 JP H0148823B2 JP 24876283 A JP24876283 A JP 24876283A JP 24876283 A JP24876283 A JP 24876283A JP H0148823 B2 JPH0148823 B2 JP H0148823B2
- Authority
- JP
- Japan
- Prior art keywords
- bucket
- protrusion
- container
- rotor
- rotating plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000010586 diagram Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Centrifugal Separators (AREA)
Description
本発明は、遠心分離機用ローターの改良に関す
る。
従来、懸垂支持するためにバケツト又は回転板
のいずれかに設ける突起は、その断面形状が円形
であつた。例えば、第１図と第２図において、１
は回転板、２はバケツト、３はチユーブ等を保持
する穴、４は回動軸をなす突起であるが、該突起
は断面形状が円形であつた。
通常は断面円形の突起であつても不都合は無い
が、バケツト２の重心と回動軸との距離が十分に
長くない場合には、バケツト２は遠心処理終了後
においても突起と突起受けとの摩擦によつて大き
く傾いたままで止つてしまい、バケツトを回転板
から取外す時に不都合を生ずることがあつた。
本発明はこのような残留傾斜を無くすことを目
的とし、その要旨は、被分離試料を収納したチユ
ーブ等の容器を保持するバケツトと、これを回動
可能に懸垂支持する回転板とからなる遠心分離機
用ローターにおいて、懸垂支持するためにバケツ
ト又は回転板のいずれかに設けた突起の回動面に
平行な断面形状を、円弧と直線によつて囲まれる
欠円形にしたことを特徴とする遠心分離機用ロー
ターにある。
第３図と第４図に示すものはその実施例であつ
て、突起５の断面形状を円弧と直線によつて囲ま
れる欠円形にしてある。他の構成は、第１図と第
２図に示すものと同じである。そして、バケツト
に突起を設ける場合（第３図）には、突起の断面
の直線部５′は突起の下方に位置させる。また回
転板に突起を設ける場合（第４図）には、突起の
断面の直線部５′は突起の上方に位置させる。
この構造によると、回転板１の停止時には、第
５図に示すように、バケツト２は垂下し、突起５
の直線部５′は受部の底面１′に面接し、回転時に
は突起５の直線部５′は受部の立上り面１″に面接
する。６は回転板１の駆動軸である。
いま、第７図と第８図において、
Ｗ：バケツトの重量
R1，R2：抗力
F1，F2：摩擦力
ｌ：バケツトの重心と回動軸との距離
ｒ：突起の半径
φ：突起の切部の大きさを示す角度
θ：バケツトの傾き
とすると、回動軸に関する反時計方向の回転モー
メントは、第７図（従来例）においては、
M1＝Wl sinθ−F1r−F2r
となる。また第８図（本発明）においては、
M2＝Wl sinθ−F1r−F2r cos（φ−θ）
＋R2r sin（φ−θ）
ただし ０≦θ＜φ
この２式を比較すると、明らかにM1＜M2であ
り、本発明の方が傾きを減らそうとする傾向が大
きいことが判る。
ここで、ｌ＝10mm、ｒ＝６mmとした場合の、欠
円の欠部の大きさを示す角度φとバケツトの残留
角度θ0との関係の実験結果を表１に示す。使用し
た材料の摩擦係数は0.47である。
The present invention relates to improvements in rotors for centrifuges. Conventionally, a protrusion provided on either a bucket or a rotary plate for suspension support has had a circular cross-sectional shape. For example, in Figures 1 and 2, 1
2 is a rotating plate, 2 is a bucket, 3 is a hole for holding a tube, etc., and 4 is a projection forming a rotation axis, and the projection has a circular cross-sectional shape. Normally, there is no problem even if the protrusion has a circular cross-section, but if the distance between the center of gravity of the bucket 2 and the rotation axis is not long enough, the bucket 2 will not be able to maintain the relationship between the protrusion and the protrusion receiver even after centrifugation. Due to friction, the bucket would stop at a large angle, causing inconvenience when removing the bucket from the rotary plate. The purpose of the present invention is to eliminate such residual inclination, and the gist of the present invention is to provide a centrifugal system consisting of a bucket that holds a container such as a tube containing a sample to be separated, and a rotary plate that rotatably supports the bucket. A rotor for a separator, characterized in that the cross-sectional shape parallel to the rotating surface of the protrusion provided on either the bucket belt or the rotary plate for suspension support is an occluded circle surrounded by an arc and a straight line. Found in centrifuge rotors. The embodiment shown in FIGS. 3 and 4 is an embodiment in which the protrusion 5 has a cross-sectional shape surrounded by an arc and a straight line. The other configurations are the same as those shown in FIGS. 1 and 2. When a protrusion is provided on the bucket bag (FIG. 3), the straight section 5' of the protrusion is positioned below the protrusion. Further, when a projection is provided on the rotating plate (FIG. 4), the straight section 5' of the projection is positioned above the projection. According to this structure, when the rotary plate 1 is stopped, the bucket 2 hangs down and the protrusion 5
The straight part 5' of the projection 5 faces the bottom surface 1' of the receiving part, and during rotation, the straight part 5' of the protrusion 5 faces the rising surface 1'' of the receiving part. 6 is the drive shaft of the rotary plate 1. Now, In Figures 7 and 8, W: weight of the bucket R 1 , R 2 : drag force F 1 , F 2 : frictional force l: distance between the center of gravity of the bucket and the rotation axis r: radius of the protrusion φ: the radius of the protrusion Assuming that the angle θ indicating the size of the cut is the inclination of the bucket, the counterclockwise rotational moment about the rotation axis is M 1 = Wl sin θ − F 1 r − F 2 in Fig. 7 (conventional example). In Fig. 8 (this invention), M 2 = Wl sinθ−F 1 r−F 2 r cos(φ−θ) +R 2 r sin(φ−θ) where 0≦θ<φ. Comparing the two equations, it is clear that M 1 <M 2 , and it can be seen that the present invention has a greater tendency to reduce the slope. Here, when l = 10 mm and r = 6 mm, the missing Table 1 shows the experimental results of the relationship between the angle φ indicating the size of the notch in the circle and the residual angle θ 0 of the bucket.The coefficient of friction of the material used was 0.47.
【表】
回転板１に突起５を設けた実施例についても全
く同様の効果があることは明らかである。[Table] It is clear that the embodiment in which the rotary plate 1 is provided with the projections 5 has exactly the same effect.
第１図と第２図は従来の遠心分離機用ローター
の支持突起を示すための部分的斜視図、第３図と
第４図は本発明の遠心分離機用ローターの支持突
起を示すための第１図と第２図と同様の斜視図、
第５図は停止時における回転板に対する支持突起
の態様を示す図、第６図は、回転時における回転
板に対する支持突起の態様を示す図、第７図と第
８図は従来例と本発明実施例における回転モーメ
ントの解析図である。
１……回転板、２……バケツト、４，５……突
起。
1 and 2 are partial perspective views showing support projections of a conventional centrifuge rotor, and FIGS. 3 and 4 are partial perspective views showing support projections of a centrifuge rotor according to the present invention. A perspective view similar to FIGS. 1 and 2;
FIG. 5 is a diagram showing the aspect of the support protrusion for the rotating plate when it is stopped, FIG. 6 is a diagram showing the aspect of the supporting protrusion for the rotating plate when it is rotating, and FIGS. 7 and 8 are the conventional example and the present invention. It is an analysis diagram of rotational moment in an example. 1...Rotating plate, 2...Bucket, 4, 5...Protrusion.
Claims (1)
持するバケツトと、これを回動可能に懸垂支持す
る回転板とからなる遠心分離機用ローターにおい
て、懸垂支持するためにバケツト又は回転板のい
ずれかに設けた突起の回動面に平行な断面形状
を、円弧と直線によつて囲まれる欠円形にしたこ
とを特徴とする遠心分離機用ローター。1. In a centrifuge rotor consisting of a bucket that holds a container such as a tube containing a sample to be separated, and a rotating plate that rotatably supports the container in a suspended manner, either the bucket or the rotating plate is used to suspend and support the container. A rotor for a centrifuge, characterized in that a cross-sectional shape parallel to a rotating surface of a protrusion provided on the rotor is a hollow circle surrounded by an arc and a straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24876283A JPS60139353A (en) | 1983-12-27 | 1983-12-27 | Rotor for centrifugal separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24876283A JPS60139353A (en) | 1983-12-27 | 1983-12-27 | Rotor for centrifugal separator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60139353A JPS60139353A (en) | 1985-07-24 |
| JPH0148823B2 true JPH0148823B2 (en) | 1989-10-20 |
Family
ID=17182992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24876283A Granted JPS60139353A (en) | 1983-12-27 | 1983-12-27 | Rotor for centrifugal separator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60139353A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6699168B2 (en) * | 2001-12-20 | 2004-03-02 | Beckman Coulter, Inc. | Rotary centrifuge having pivoting buckets for holding samples |
-
1983
- 1983-12-27 JP JP24876283A patent/JPS60139353A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60139353A (en) | 1985-07-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |