EP0861689A2 - Laborzentrifuge - Google Patents
Laborzentrifuge Download PDFInfo
- Publication number
- EP0861689A2 EP0861689A2 EP97117570A EP97117570A EP0861689A2 EP 0861689 A2 EP0861689 A2 EP 0861689A2 EP 97117570 A EP97117570 A EP 97117570A EP 97117570 A EP97117570 A EP 97117570A EP 0861689 A2 EP0861689 A2 EP 0861689A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- locking
- drive motor
- laboratory centrifuge
- speed
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B13/00—Control arrangements specially designed for centrifuges; Program control of centrifuges
- B04B13/003—Rotor identification systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
Definitions
- the invention relates to a laboratory centrifuge according to the preamble of claim 1.
- Laboratory centrifuges are used, for example, in medical-pharmaceutical Area used and serve the decomposition of mixtures of substances Given the different density of their components, the Separation process depending on the properties of the to be treated Substances expire under defined thermal conditions.
- substances are introduced into individual vessels, which in turn is used in prepared recordings of the rotor from which they will also return after performing the procedure be removed.
- the rotor is connected to a drive motor and is oscillatable together with it within a housing arranged.
- an interlocking locking device is essential, over which the rotor in a defined angular position is noticeable.
- This angle of rotation position is expedient set up to interact with a robot-like Handling device is suitable.
- the locking process is by means of the control assigned to the centrifuge anyway carried out. This contains information about the speed of the rotor and - on the evaluation of, from the detection or sampling the signal carrier resulting signal pattern - also information available via the current angular position of the rotor, with this information the braking process and - with participation the locking device also trigger the locking.
- the mechanical constructive structure of the locking device is designed extraordinarily simple, largely using components is made with a conventional laboratory centrifuge drive are present anyway.
- the features of claim 4 are to further specify the Arrangement of the actuator in a laboratory centrifuge directed.
- the already existing information carrier for the Signal body is used at the same time as a carrier of the holes a part of the locking devices used according to the invention form, there is a particularly simple structure in which a largely Use of existing components is given. Same thing applies to the arrangement of the actuators as such, which are also attached to a component that is already present is and for attaching the interacting with the signal carriers Serves as a transformer.
- the signal carriers can correspond to the features of claim 5 designed according to different physical principles of action be for use in connection with the subject matter of the invention only one property is essential, namely suitability to generate information regarding the current angle of rotation position of the rotor, as this information is part of the centrifuge control is required to initiate the locking process.
- the invention further relates to a method for operating an inventive Laboratory centrifuge, which is based on the task Locking process and in particular the locking position safely and perform in a reproducible manner.
- FIG. 1 denotes the drive motor of a laboratory centrifuge, whose axis 2 extends vertically and at its top End with a centrifuge rotor 3, which is only indicated in the drawing communicates.
- the system of rotor 3 and drive motor 1 is in also not shown in the drawing within a housing arranged to oscillate.
- the rotor 3 carries in a known manner in its peripheral area a series of interchangeably arranged vessels that are used to hold by centrifugation in components of different densities certain fabrics are set up, the housing continues to do so can be designed that the process of centrifuging under selectable thermal conditions can expire. This is said to will not be discussed in more detail below.
- At 4 is a disc-like, with the centrifuge rotor in fixed Connected, arranged rotationally symmetrical to axis 2
- Designated information carrier which among other things intended for rotor identification and is set up.
- the rotor 3 is replaceable Way in connection with the drive motor 1 and it is everyone Rotor each assigned rotor-specific maximum speeds that are being considered the comparatively high speeds with which these rotors are operated for safety reasons allowed to.
- the information carrier is on its bottom 5 with a contactlessly scanned, for example magnetic Provide coding, which in connection with a parent Controlling the commissioning of the laboratory centrifuge the maximum permissible speed.
- the information carrier 4 is on one first pitch circle 6 with the radius R2 with a distribution of individual Magnetic body 7 provided, which according to predetermined Angular positions are located along this pitch circle 6.
- the magnetic body can be of the same polarity, so that it all that matters is their distribution along the pitch circle - they However, they can also be of different polarity in a defined manner be.
- an electromagnetic scanning system also comes for example an optical one, on light passage or System based on light reflection. This is said to not be discussed in more detail. It is only essential that a bit pattern is formed by the input signal, which at least the maximum permissible speed of the rotor used in the input circuit of the transformer.
- the speed of the drive motor 1 is contactless scanning speed sensor, for example a tachometer generator referred to, also in connection with the control mentioned stands.
- a tachometer generator referred to, also in connection with the control mentioned stands.
- the output side an electrical measurement signal corresponding to the measured speed generated.
- FIG. 3 and 4 are components that with those of FIG. 1st and 2 match, numbered accordingly, so that on a related repeated description can be omitted.
- the essential feature of the actuating device used in each case is a Drive system for transferring the locking bolt 11 between the above Positions.
- This drive system can work in both directions be effective - however, it can also be one-way spring loaded Act system so that one of the two positions is through the restoring force of a spring is defined. It can be a Electromechanical, but also a pressure-operated drive system act.
- 3 and 4 is an example of an electromechanical one trained actuator 13 'shown, in which the movement of the locking bolt 11 is generated by means of a lever 15.
- the distribution of the magnetic body 7 along the pitch circle due to the fixed angular relationship between these magnetic bodies on the one hand and the insertion or Mounting positions of the vessels of the rotor also include the angle of rotation position the vessels are encoded. This in turn opens up a particularly advantageous one Possibility of zeroing the rotor in a simple and in particular reproducible to find with high positioning accuracy and if necessary, stop the rotor in this position and lock.
- the bit pattern according to FIG. 5 is continuously monitored as part of a higher-level control system, and when the rotor is to be stopped in the 0 0 position, braking is first carried out to a defined minimum speed v u , whereupon by means of the Actuating device 13 of the locking bolt 11 is extended and triggers the standstill of the rotor as a result of snapping into the next bore 10.
- This position can be the 0 ° position, but it can also be the 90 0 position, the 180 0 position, etc.
- the number of these locking positions corresponds to the number of insertion or hanging positions of the vessels of the rotor.
- a laboratory centrifuge equipped in this sense is special Dimensions for interaction with robot-like handling devices suitable, for example, when it comes to the task of a certain one Take the vessel from the mounting position of the rotor and for this process a defined position of this vessel is to be provided.
- the centrifuge equipped in the above sense can be controlled accordingly that the rotor is braked to a standstill and it is locked that a certain vessel is in the zero position or another defined angular position and for a Removal from the rotor by means of a robot-like device for Available.
- the latter facility can thus do so trained or controlled that only a certain, centrifuge-specific removal position must be observed, which the movement of the robot-like device is simplified.
Landscapes
- Centrifugal Separators (AREA)
Abstract
Description
Claims (6)
- Laborzentrifuge, bestehend aus einem, im peripheren Bereich mit Aufnahmen für auswechselbar angeordnete, ein zu behandelndes Stoffgemisch aufnehmende Gefäße versehenen Rotor (3) und einem Antriebsmotor (1), welche beide in einem Gehäuse schwingfähig aufgenommen sind, wobei der Rotor (3) mit einer Anordnung von berührungslos erfaßbaren Signalträgern versehen ist, durch deren Anordnung entlang eines Teilkreises (6) zumindest die zulässige Höchstdrehzahl des Rotors (3) kodiert ist, wobei dem Antriebsmotor (1) eine Steuerung zugeordnet ist, die ihrerseits mit einem Übertrager (4) in Verbindung steht, der zum Zusammenwirken mit den Signalträgern bestimmt und eingerichtet ist,
dadurch gekennzeichnet,daß dem Rotor (3) eine formschlüssig wirksame Arretiereinrichtung zugeordnet ist, die mit der Steuerung in Wirkverbindung steht unddaß die Steuerung ausgehend von der Drehzahl des Antriebsmotors (1) und der über die Erfassung der Signalträger gegebenen Winkelposition zum Abbremsen und zum Arretieren des Rotors (3) mittels der Arretiereinrichtung in definierten Winkelpositionen bestimmt und eingerichtet ist. - Laborzentrifuge nach Anspruch 1,
dadurch gekennzeichnet,daß die Arretiereinrichtung aus einer vorzugsweise an dem Antriebsmotor (1) angebrachten, einen Arretierbolzen (11) aufweisenden Betätigungseinrichtung (13, 13') besteht, dem Bohrungen (10) oder vergleichbare, zum Zusammenwirken mit dem Arretierbolzen (11) geeignete Ausnehmungen des Rotors (3) oder eines mit dem Rotor (3) in fester Verbindung stehenden Bauteils gegenüberliegend angeordnet sind. - Laborzentrifuge nach Anspruch 2,
dadurch gekennzeichnet,daß die Bohrungen (10) entlang eines Teilkreises (9) um die Achse (2) des Rotors (3) angeordnet sind unddaß den Winkelpositionen der Bohrungen (10) entlang dieses Teilkreises (9) jeweils Winkelpositionen der Aufnahmen jeweils wenigstens eines Gefäßes entsprechen. - Laborzentrifuge nach Anspruch 2 oder 3,
dadurch gekennzeichnet,daß die Bohrungen (10) und die Signalträger in bzw. an einem kreisscheibenartigen, mit dem Rotor (3) in fester Verbindung stehenden Informationsträger (4) angeordnet sind unddaß der wenigstens eine, den Signalträgern zugeordnete Übertrager sowie die Betätigungseinrichtung (13, 13') durch eine, an dem Gehäuse des Antriebsmotors (1) angeordnete, dem Informationsträger (4) mit geringem Abstand gegenüberliegende Lagerplatte (12) gehalten sind. - Laborzentrifuge nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,daß die Signalträger in an sich bekannter Weise durch Magnetkörper (7) oder optisch wirksame lichtdurchlässige oder lichtreflektierende Elemente gebildet werden unddaß der Übertrager dementsprechend als induktiv wirksames oder als ein zum Lichtempfang eingerichtetes Element ausgebildet ist. - Verfahren zum Arretieren des Rotors (3) einer Laborzentrifuge nach einem der vorangegangenen Ansprüche 1 bis 5 in wählbaren, jeweils den Aufnahmen der Gefäße entsprechenden 'Winkelpositionen,
dadurch gekennzeichnet,daß ausgehend von den Meßwerten der Drehzahl des Rotors (3) und der über die Signalträger gegebenen Winkelpositionen eine Abbremsung bis auf eine untere Geschwindigkeit vu eingeleitet wird,daß nach Erreichen der unteren Geschwindigkeit vu mittels der Betätigungseinrichtung der Arretierbolzen (11) bis in eine solche Stellung in Richtung auf seine Verriegelungsstellung hin verschoben wird, in der bei Erreichen der jeweiligen Bohrung (10) ein Einrasten ausgelöst wird unddaß die Verrastungsposition des Arretierbolzens (11) durch einen, mittel der Steuerung eingeleiteten Wiederanfahrversuch des Antriebsmotors (1) überprüft wird.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19706997A DE19706997C2 (de) | 1997-02-22 | 1997-02-22 | Laborzentrifuge |
| DE19706997 | 1997-02-22 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0861689A2 true EP0861689A2 (de) | 1998-09-02 |
| EP0861689A3 EP0861689A3 (de) | 1999-08-11 |
| EP0861689B1 EP0861689B1 (de) | 2002-05-02 |
Family
ID=7821102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97117570A Expired - Lifetime EP0861689B1 (de) | 1997-02-22 | 1997-10-10 | Laborzentrifuge |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0861689B1 (de) |
| DE (2) | DE19706997C2 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6591514B2 (en) | 2001-01-15 | 2003-07-15 | Sanovo Engineering A/S | Centrifuge for draining washed egg trays |
| CN1332766C (zh) * | 2003-05-30 | 2007-08-22 | 月岛机械株式会社 | 悬挂式离心机及其电机的驱动控制方法 |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6524231B1 (en) | 1999-09-03 | 2003-02-25 | Baxter International Inc. | Blood separation chamber with constricted interior channel and recessed passage |
| US6322488B1 (en) | 1999-09-03 | 2001-11-27 | Baxter International Inc. | Blood separation chamber with preformed blood flow passages and centralized connection to external tubing |
| US6315707B1 (en) | 1999-09-03 | 2001-11-13 | Baxter International Inc. | Systems and methods for seperating blood in a rotating field |
| US6860846B2 (en) | 1999-09-03 | 2005-03-01 | Baxter International Inc. | Blood processing systems and methods with umbilicus-driven blood processing chambers |
| JP3951582B2 (ja) * | 2000-10-06 | 2007-08-01 | 日立工機株式会社 | 遠心分離機 |
| US6849039B2 (en) | 2002-10-24 | 2005-02-01 | Baxter International Inc. | Blood processing systems and methods for collecting plasma free or essentially free of cellular blood components |
| US7297272B2 (en) | 2002-10-24 | 2007-11-20 | Fenwal, Inc. | Separation apparatus and method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE758594A (fr) * | 1969-11-07 | 1971-04-16 | Rohe Scientific Corp | Laboratoire clinique automatique |
| US4208484A (en) * | 1977-03-22 | 1980-06-17 | Olympus Optical Co., Ltd. | Apparatus for handling centrifuge tubes in automatic culture system |
| FR2629370A1 (fr) * | 1988-03-30 | 1989-10-06 | Ibal | Installation robotisee d'analyses comportant une centrifugeuse |
| JPH0427457A (ja) * | 1990-05-23 | 1992-01-30 | Matsushita Electric Ind Co Ltd | 遠心分離機および自動遠心分離装置 |
| DE9401758U1 (de) * | 1994-02-03 | 1994-03-17 | Sigma Laborzentrifugen Gmbh, 37520 Osterode | Zentrifuge |
-
1997
- 1997-02-22 DE DE19706997A patent/DE19706997C2/de not_active Expired - Fee Related
- 1997-10-10 EP EP97117570A patent/EP0861689B1/de not_active Expired - Lifetime
- 1997-10-10 DE DE59707153T patent/DE59707153D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| None |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6591514B2 (en) | 2001-01-15 | 2003-07-15 | Sanovo Engineering A/S | Centrifuge for draining washed egg trays |
| CN1332766C (zh) * | 2003-05-30 | 2007-08-22 | 月岛机械株式会社 | 悬挂式离心机及其电机的驱动控制方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59707153D1 (de) | 2002-06-06 |
| DE19706997C2 (de) | 1999-08-05 |
| DE19706997A1 (de) | 1998-08-27 |
| EP0861689A3 (de) | 1999-08-11 |
| EP0861689B1 (de) | 2002-05-02 |
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