EP0192571B1 - Test tubes support for a centrifuge, and its manufacturing method - Google Patents

Test tubes support for a centrifuge, and its manufacturing method Download PDF

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Publication number
EP0192571B1
EP0192571B1 EP86400337A EP86400337A EP0192571B1 EP 0192571 B1 EP0192571 B1 EP 0192571B1 EP 86400337 A EP86400337 A EP 86400337A EP 86400337 A EP86400337 A EP 86400337A EP 0192571 B1 EP0192571 B1 EP 0192571B1
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EP
European Patent Office
Prior art keywords
plates
slide portions
support
carrier according
abutments
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
Application number
EP86400337A
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German (de)
French (fr)
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EP0192571A3 (en
EP0192571A2 (en
Inventor
Fernand Barbin
Albert Aretin
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Jouan SA
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Jouan SA
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Application filed by Jouan SA filed Critical Jouan SA
Priority to AT86400337T priority Critical patent/ATE41885T1/en
Publication of EP0192571A2 publication Critical patent/EP0192571A2/en
Publication of EP0192571A3 publication Critical patent/EP0192571A3/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01LCHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L9/00Supporting devices; Holding devices
    • B01L9/06Test-tube stands; Test-tube holders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B5/00Other centrifuges
    • B04B5/04Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers
    • B04B5/0407Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles
    • B04B5/0414Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes
    • B04B5/0421Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes pivotably mounted
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B5/00Other centrifuges
    • B04B5/04Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers
    • B04B5/0407Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles
    • B04B2005/0435Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles with adapters for centrifuge tubes or bags

Definitions

  • a centrifuge rotor for the centrifugation of samples contained in test tubes.
  • This rotor comprises several arms spaced radially and forming between them intervals in which nacelles are mounted so as to be able to pivot on said arms.
  • Each of said nacelles is in the form of a cylindrical tank and receives a stack of plates of diameter substantially equal to the internal diameter of the tank, and which are pierced with holes for the introduction of test tubes.
  • Said plates can be moved in a block and held in a predetermined orientation such that their holes are respectively in alignment with each other, by means of a U-shaped holding element, the central branch of which supports the stack of plates and whose vertical arms are received in diametrically opposite notches, formed in the edge of the plates.
  • a support plate At the base of the stack of plates is a support plate on which the bottom of the test tubes rests.
  • the user can thus make a custom rack of height close to that of the tubes used, by threading on the branches of the holding element, the support plate and the desired number of plates so that the stack has the desired height. All of the plates can then be transported as a whole by means of the holding element and inserted inside the tank.
  • the present invention aims to remedy this drawback of racks of the known prior art, and for this purpose relates to a rack of the type comprising several stacked plates, pierced with holes and oriented angularly so that their respective holes are in alignment with each other. others, thus forming housings for receiving the tubes, said plates being slidably mounted on two parallel arms of a U-shaped support; said support comprises a sole of surface substantially equal to that of the plates and two slides coming from manufacture with the sole, and which are received in axial notches, formed in diametrically opposite positions on the edges of the stacked plates, said slides being provided on their inner face to the support, above the upper plate, stops intended to prevent the withdrawal of the plates or the insertion of other plates in the support.
  • the stops are formed by local deformation of said slides.
  • the support can for example be produced by molding a thermoplastic material and the stops produced by melting the material at the point where the stops are to be formed. But it goes without saying that the support can also be made of metal, the stops then being stamped.
  • the stops can also be formed by attachments on the slides.
  • the stops are constituted by grooved nails fixed on the slides and the point of which protrudes from the inner face of the latter.
  • the slides and the notches have dovetail sections of complementary shapes.
  • the plates cannot be removed from the support while trying to separate the slides from one another since the dovetail assembly is opposed to it.
  • the invention also relates to a method of producing the rack.
  • This method consists in threading on the support rails a number of plates such that the height of the plate stack is less than the height of the tubes to be centrifuged, then forming the stops on said slides.
  • a centrifuge rotor 10 is mounted rotating around an axis 12.
  • the rotor is of the star type and comprises several radial arms 14 defining between them intervals in which are arranged nacelles 16 in the form of cylindrical tank.
  • each nacelle is pivotally mounted on the arms which enclose it around pivots 18, so that when the rotor 10 is at rest, the nacelle takes the position shown in solid lines in FIG. 1, and when the rotor turns, it pivots towards the position shown in dashed lines.
  • each nacelle is inserted a rack 20 for test tubes 22 which is shown in detail in FIGS. 2 to 4.
  • the rack comprises a support 24 intended to receive a plurality of stacked plates 26.
  • the support comprises a substantially flat sole 28, of diameter equal to the inside diameter of the nacelle 16.
  • the slides can come from manufacturing with the sole 28 or be produced separately and attached to the latter by any known means, for example by welding, gluing, or screwing.
  • the sole and the slides are obtained by molding a plastic material.
  • the sole has on its upper face a series of substantially hemispherical holes 33, intended to receive the lower end of the test tubes.
  • the upper face of the sole can be covered with a plate of elastically deformable material, for example rubber.
  • the tubes have non-punctual contact with the soleplate, which makes it possible to reduce the stresses on the tubes during rotation of the rotor and consequently achieve much higher rotor rotation speeds. in case the contact is punctual.
  • the slides are flat and have a dovetail cross section which widens towards the inside of the support.
  • the slides are long enough that, when the sole 28 of the support rests on the bottom of the nacelle 16, the upper ends of the slides arrive slightly above the level of the upper edge of the nacelle. Said ends are curved outward to form portions 34 allowing the establishment and removal of said racks.
  • the plates 26 have a cylindrical side wall with a diameter equal to that of the sole. As shown in FIG. 6, they have, at two diametrically opposite points on said side wall, two axial notches 36, 38 in the form of a dovetail, of cross section complementary to that of the slides 30, 32.
  • the plates are pierced with a plurality of axial holes 40 of diameter slightly greater than the external diameter of the test tubes 22. These holes are arranged on each plate in the same way with respect to the notches 36, 38. It follows that when several plates are threaded on the slides, their respective holes come into alignment with each other, thus forming a cylindrical housing in which a test tube 22 can be inserted.
  • the number of plates stacked on the sole 28 is chosen so that the total height of the stack is less than the height of the test tubes.
  • the slides 30, 32 are provided with stops 42 intended to oppose the withdrawal of the plates upwards, without however preventing their sliding movement along the slides.
  • the stops are arranged widely above the highest plate of the stack, for example in the vicinity of the upper ends of the slides. They can be produced by any known means, for example, as in the case illustrated in FIGS. 2 to 5, by locally deforming hot the plastic material of the slides, so as to reveal the stops on the internal face of the slides.
  • the stops are constituted by grooved nails 44 fixed through the wall of the slides and whose tip protrudes from the internal face of the latter.
  • each of the latter has on its underside at least one groove 46.
  • the contents of the tubes can be observed through the bloodletting.
  • the latter also have the role of allowing better stability of tackles. It is in fact understood that it is simpler to obtain good contact of a plate on the plate situated below it when the contact surface is reduced to that of the projecting portions 48 defined on either side of the grooves.
  • the slides 30, 32, the notches 36 can have any other shape of section which opposes the withdrawal of the plates by spacing the slides.

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  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Centrifugal Separators (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)

Abstract

1. A carrier of the type comprising a plurality of stocked plates which are provided with holes and which are angularly oriented in such a way that their respective holes (40) are in mutual alignment, thus forming housings for receiving tubes (22), said plates being mounted slidably on two parallel arms of a U-shaped support ; said support (24) comprises a base portion (28) with a surface substantially equal to that of the plates (26) and two slide portions (30, 32) which are produced in one piece with the base portion and which are received in axial recesses (36, 38) formed at diametrally opposed positions on the edges of the plates, said slide portions being provided on their face which is inward with respect to the support, above the upper plate, with abutments (42) intended to prevent withdrawal of the plates or insertion of other plates into the support.

Description

Par le US-A-4 032 066, on connaît un rotor de centrifugeuse pour la centrifugation d'échantillons contenus dans des tubes à essais. Ce rotor comprend plusieurs bras espacés radialement et formant entre eux des intervalles dans lesquels des nacelles sont montées pour pouvoir pivoter sur lesdits bras.From US-A-4,032,066, a centrifuge rotor is known for the centrifugation of samples contained in test tubes. This rotor comprises several arms spaced radially and forming between them intervals in which nacelles are mounted so as to be able to pivot on said arms.

Chacune desdites nacelles est en forme de cuve cylindrique et reçoit une pile de plaques de diamètre sensiblement égal au diamètre interne de la cuve, et qui sont percées de trous pour l'introduction de tubes à essais. Lesdites plaques peuvent être déplacées en bloc et maintenues dans une orientation prédéterminée telle, que leurs trous soient respectivement dans l'alignement les uns des autres, au moyen d'un élément de maintien en forme de U, dont la branche centrale supporte la pile de plaques et dont les bras verticaux sont reçus dans des encoches diamétralement opposées, formées dans la tranche des plaques. A la base de la pile de plaques se trouve une plaquette-support sur laquelle vient reposer le fond des tubes à essais.Each of said nacelles is in the form of a cylindrical tank and receives a stack of plates of diameter substantially equal to the internal diameter of the tank, and which are pierced with holes for the introduction of test tubes. Said plates can be moved in a block and held in a predetermined orientation such that their holes are respectively in alignment with each other, by means of a U-shaped holding element, the central branch of which supports the stack of plates and whose vertical arms are received in diametrically opposite notches, formed in the edge of the plates. At the base of the stack of plates is a support plate on which the bottom of the test tubes rests.

L'utilisateur peut ainsi réaliser sur mesure un portoir de hauteur voisine de celle des tubes utilisés, en enfilant sur les branches de l'élément de maintien, la plaquette-support et le nombre voulu de plaques pour que la pile ait la hauteur souhaitée. L'ensemble des plaques peut alors être transporté en bloc au moyen de l'élément de maintien et inséré à l'intérieur de la cuve.The user can thus make a custom rack of height close to that of the tubes used, by threading on the branches of the holding element, the support plate and the desired number of plates so that the stack has the desired height. All of the plates can then be transported as a whole by means of the holding element and inserted inside the tank.

Cependant, la réalisation d'un tel portoir où les plaques sont amovibles et peuvent être ajoutées à la guise de l'utilisateur, peut entraîner un grave inconvénient pour le fonctionnement de la centrifugeuse. Il peut arriver en effet que, par inadvertance, une ou plusieurs plaques supplémentaires soient introduites dans le portoir ou qu'au contraire une ou plusieurs plaques en soient retirées. Si des portoirs n'ayant pas le même nombre de plaques sont chargés dans le centrifugeur, le rotor s'en trouvera déséquilibré et entraînera une vibration intense du centrifugeur.However, the realization of such a rack where the plates are removable and can be added as desired by the user, can cause a serious drawback for the operation of the centrifuge. It may indeed happen that, inadvertently, one or more additional plates are introduced into the rack or, on the contrary, one or more plates are removed therefrom. If racks not having the same number of plates are loaded in the centrifuge, the rotor will be unbalanced and will cause an intense vibration of the centrifuge.

D'autre part, dans certains portoirs il peut s'avérer nécessaire d'utiliser des plaques différentes et de les empiler dans un ordre très précis. C'est ainsi par exemple que l'on utilise parfois une galette en caoutchouc qui vient se placer au-dessus de la pile de plaques et dont les trous ont un diamètre légèrement inférieur à celui des trous des plaques. Cette galette a pour rôle d'enserrer les tubes à leur partie supérieure et de les maintenir en place dans le portoir. Lorsqu'après centrifugeage on retourne le portoir pour vider les tubes de leur contenu, ces derniers sont empêchés de tomber par la galette de caoutchouc qui les enserre.On the other hand, in some racks it may be necessary to use different plates and stack them in a very precise order. For example, a rubber wafer is sometimes used which is placed above the stack of plates and whose holes have a diameter slightly smaller than that of the holes in the plates. The role of this wafer is to enclose the tubes at their upper part and to keep them in place in the rack. When, after centrifuging, the rack is turned over to empty the tubes of their contents, the latter are prevented from falling by the rubber wafer which encloses them.

Dans d'autres cas, il arrive qu'on utilise une galette supplémentaire de faible épaisseur et de diamètre inférieur à celui des autres plaques, qui sert à adapter dans le portoir un type de tubes qui ne doit pas reposer sur le fond du portoir.In other cases, it happens that an additional wafer of small thickness and diameter smaller than that of the other plates is used, which serves to adapt in the rack a type of tubes which must not rest on the bottom of the rack.

Ces deux exemples montrent l'importance qu'il y a à respecter l'ordre d'empilement des plaques et galettes et à ne pas en oublier. Il va de soi que si les plaques et galettes sont amovibles et sont empilées par un opérateur, des erreurs dans l'empilement ou des oublis deviennent possibles, avec de graves conséquences, comme par exemple la chute des tubes dans le premier exemple cité, ou la détérioration des tubes dans le deuxième exemple.These two examples show the importance of respecting the stacking order of the plates and pancakes and not to forget them. It goes without saying that if the plates and pancakes are removable and are stacked by an operator, errors in stacking or oversights become possible, with serious consequences, such as for example the fall of the tubes in the first example cited, or the deterioration of the tubes in the second example.

La présente invention vise à remédier à cet inconvénient des portoirs de la technique antérieure connue, et concerne à cet effet un portoir du type comportant plusieurs plaques empilées, percées de trous et orientées angulairement de manière que leurs trous respectifs soient dans l'alignement les uns des autres, formant ainsi des logements pour la réception des tubes, lesdites plaques étant montées coulissantes sur deux bras parallèles d'un support en forme de U ; ledit support comprend une semelle de surface sensiblement égale à celle des plaques et deux glissières venant de fabrication avec la semelle, et qui sont reçues dans des encoches axiales, formées en des positions diamétralement opposées sur les chants des plaques empilées, lesdites glissières étant pourvues sur leur face intérieure au support, au-dessus de la plaque supérieure, de butées destinées à empêcher le retrait des plaques ou l'insertion d'autres plaques dans le support.The present invention aims to remedy this drawback of racks of the known prior art, and for this purpose relates to a rack of the type comprising several stacked plates, pierced with holes and oriented angularly so that their respective holes are in alignment with each other. others, thus forming housings for receiving the tubes, said plates being slidably mounted on two parallel arms of a U-shaped support; said support comprises a sole of surface substantially equal to that of the plates and two slides coming from manufacture with the sole, and which are received in axial notches, formed in diametrically opposite positions on the edges of the stacked plates, said slides being provided on their inner face to the support, above the upper plate, stops intended to prevent the withdrawal of the plates or the insertion of other plates in the support.

Dans un mode de réalisation avantageux de l'invention, les butées sont formées par déformation locale desdites glissières. Le support peut par exemple être réalisé par moulage d'une matière thermoplastique et les butées réalisées en faisant fondre la matière à l'endroit où l'on veut former les butées. Mais il va de soi que le support peut être également réalisé en métal, les butées étant alors embouties.In an advantageous embodiment of the invention, the stops are formed by local deformation of said slides. The support can for example be produced by molding a thermoplastic material and the stops produced by melting the material at the point where the stops are to be formed. But it goes without saying that the support can also be made of metal, the stops then being stamped.

Les butées peuvent également être constituées par des pièces rapportées sur les glissières. Dans un exemple de réalisation particulier, les butées sont constituées par des clous cannelés fixés sur les glissières et dont la pointe fait saillie sur la face intérieure de ces dernières.The stops can also be formed by attachments on the slides. In a particular embodiment, the stops are constituted by grooved nails fixed on the slides and the point of which protrudes from the inner face of the latter.

Avantageusement, les glissières et les encoches ont des sections en queue d'aronde de formes complémentaires. Ainsi, les plaques ne peuvent être retirées du support en tentant d'écarter les glissières l'une de l'autre puisque l'assemblage en queue d'aronde s'y oppose.Advantageously, the slides and the notches have dovetail sections of complementary shapes. Thus, the plates cannot be removed from the support while trying to separate the slides from one another since the dovetail assembly is opposed to it.

Le nombre de plaques ne pouvant être modifié, il convient de réaliser plusieurs portoirs portant des nombres différents de plaques et destinés à recevoir des tubes de hauteurs différentes.Since the number of plates cannot be modified, it is advisable to make several racks carrying different numbers of plates and intended to receive tubes of different heights.

L'invention concerne également un procédé de réalisation du portoir. Ce procédé consiste à enfiler sur les glissières du support un nombre de plaques tel que la hauteur de la pile de plaque soit inférieure à la hauteur des tubes à centrifuger, puis à former les butées sur lesdites glissières.The invention also relates to a method of producing the rack. This method consists in threading on the support rails a number of plates such that the height of the plate stack is less than the height of the tubes to be centrifuged, then forming the stops on said slides.

Un mode de réalisation de l'invention sera décrit à présent en regard des dessins annexés dans lesquels :

  • . La figure 1 est une vue en plan d'un rotor en étoile du type à nacelles, deux nacelles seulement étant représentées pour la clarté du dessin ;
  • La figure 2 est une vue en perspective d'un portoir, la nacelle n'étant pas représentée ;
  • La figure 3 est une vue en perspective du portoir, les plaques occupant une position différente ;
  • La figure 4 est une vue en coupe suivant la ligne IV-IV de la figure 2 et montrant une première forme de réalisation des butées ;
  • Les figures 5 et 6 sont des vues en perspective de deux éléments constituant le portoir, et
  • La figure 7 est une vue analogue à la figure 4 et montrant une autre forme de réalisation des butées.
An embodiment of the invention will now be described with reference to the accompanying drawings in which:
  • . Figure 1 is a plan view of a star rotor of the nacelle type, only two nacelles being shown for clarity of the drawing;
  • Figure 2 is a perspective view of a rack, the nacelle not being shown;
  • Figure 3 is a perspective view of the rack, the plates occupying a different position;
  • Figure 4 is a sectional view along line IV-IV of Figure 2 and showing a first embodiment of the stops;
  • FIGS. 5 and 6 are perspective views of two elements constituting the rack, and
  • Figure 7 is a view similar to Figure 4 and showing another embodiment of the stops.

Avec référence à la figure 1, un rotor de centrifugeuse 10 est monté tournant autour d'un axe 12. Le rotor est de type en étoile et comprend plusieurs bras radiaux 14 définissant entre eux des intervalles dans lesquels sont disposées des nacelles 16 en forme de cuve cylindrique. De façon connue en soi, chaque nacelle est montée pivotante sur les bras qui l'enserrent autour de pivots 18, de sorte que lorsque le rotor 10 est au repos, la nacelle prend la position représentée en traits pleins sur la figure 1, et lorsque le rotor tourne, elle pivote vers la position montrée en traits tiretés.With reference to FIG. 1, a centrifuge rotor 10 is mounted rotating around an axis 12. The rotor is of the star type and comprises several radial arms 14 defining between them intervals in which are arranged nacelles 16 in the form of cylindrical tank. In a manner known per se, each nacelle is pivotally mounted on the arms which enclose it around pivots 18, so that when the rotor 10 is at rest, the nacelle takes the position shown in solid lines in FIG. 1, and when the rotor turns, it pivots towards the position shown in dashed lines.

Dans chaque nacelle est inséré un portoir 20 pour tubes à essais 22 qui est représenté en détail sur les figures 2 à 4. Le portoir comprend un support 24 destiné à recevoir une pluralité de plaques empilées 26. Le support comprend une semelle sensiblement plate 28, de diamètre égal au diamètre intérieur de la nacelle 16.In each nacelle is inserted a rack 20 for test tubes 22 which is shown in detail in FIGS. 2 to 4. The rack comprises a support 24 intended to receive a plurality of stacked plates 26. The support comprises a substantially flat sole 28, of diameter equal to the inside diameter of the nacelle 16.

En deux points diamétralement opposés dudit fond se dressent, au-dessus de ce dernier, deux glissières 30, 32 dont le profil extérieur reste compris à l'intérieur de la limite définie par la paroi latérale du fond.At two diametrically opposite points of said bottom stand, above the latter, two slides 30, 32 whose outer profile remains within the limit defined by the side wall of the bottom.

Les glissières peuvent venir de fabrication avec la semelle 28 ou être réalisées séparément et rapportées sur ce dernier par tout moyen connu, par exemple par soudage, collage, ou vissage. Dans une forme de réalisation préférée, la semelle et les glissières sont obtenues par moulage d'une matière plastique.The slides can come from manufacturing with the sole 28 or be produced separately and attached to the latter by any known means, for example by welding, gluing, or screwing. In a preferred embodiment, the sole and the slides are obtained by molding a plastic material.

La semelle présente sur sa face supérieure une série de trous 33 sensiblement hémisphériques, destinés à recevoir l'extrémité inférieure des tubes à essais.The sole has on its upper face a series of substantially hemispherical holes 33, intended to receive the lower end of the test tubes.

Dans une autre forme de réalisation connue en soi, la face supérieure de la semelle peut être recouverte d'une plaquette en matière déformable élastiquement, par exemple en caoutchouc. Dans un cas comme dans l'autre, les tubes ont un contact non ponctuel avec la semelle, ce qui permet de diminuer les contraintes sur les tubes lors de la rotation du rotor et d'atteindre par conséquent des vitesses de rotation du rotor bien supérieures au cas où le contact serait ponctuel.In another embodiment known per se, the upper face of the sole can be covered with a plate of elastically deformable material, for example rubber. In either case, the tubes have non-punctual contact with the soleplate, which makes it possible to reduce the stresses on the tubes during rotation of the rotor and consequently achieve much higher rotor rotation speeds. in case the contact is punctual.

Sur les figures 2 à 5, les glissières sont plates et présentent une section transversale en queue d'aronde qui s'évase vers l'intérieur du support. Les glissières sont suffisamment longues pour que, lorsque la semelle 28 du support repose sur le fond de la nacelle 16, les extrémités supérieures des glissières arrivent légèrement au-dessus du niveau du bord supérieur de la nacelle. Lesdites extrémités sont recourbées vers l'extérieur pour former des portions 34 permettant la mise en place et le retrait desdits portoirs.In FIGS. 2 to 5, the slides are flat and have a dovetail cross section which widens towards the inside of the support. The slides are long enough that, when the sole 28 of the support rests on the bottom of the nacelle 16, the upper ends of the slides arrive slightly above the level of the upper edge of the nacelle. Said ends are curved outward to form portions 34 allowing the establishment and removal of said racks.

Les plaques 26 ont une paroi latérale cylindrique de diamètre égal à celui de la semelle. Comme le montre la figure 6, elles présentent en deux points diamétralement opposés de ladite paroi latérale, deux encoches axiales 36, 38 en forme de queue d'aronde, de section complémentaire de celle des glissières 30, 32.The plates 26 have a cylindrical side wall with a diameter equal to that of the sole. As shown in FIG. 6, they have, at two diametrically opposite points on said side wall, two axial notches 36, 38 in the form of a dovetail, of cross section complementary to that of the slides 30, 32.

Les plaques sont percées d'une pluralité de trous axiaux 40 de diamètre légèrement supérieur au diamètre externe des tubes à essais 22. Ces trous sont disposés sur chaque plaque de la même manière par rapport aux encoches 36, 38. Il en résulte que lorsque plusieurs plaques sont enfilées sur les glissières, leurs trous respectifs viennent en alignement les uns par rapport aux autres, formant ainsi un logement cylindrique dans lequel un tube à essais 22 peut être inséré. Le nombre de plaques empilées sur la semelle 28 est choisi pour que la hauteur totale de la pile soit inférieure à la hauteur des tubes à essais.The plates are pierced with a plurality of axial holes 40 of diameter slightly greater than the external diameter of the test tubes 22. These holes are arranged on each plate in the same way with respect to the notches 36, 38. It follows that when several plates are threaded on the slides, their respective holes come into alignment with each other, thus forming a cylindrical housing in which a test tube 22 can be inserted. The number of plates stacked on the sole 28 is chosen so that the total height of the stack is less than the height of the test tubes.

Conformément à l'invention, les glissières 30, 32 sont munies de butées 42 destinées à s'opposer au retrait des plaques vers le haut, sans toutefois empêcher leur mouvement de coulissement le long des glissières. A cet effet, les butées sont disposées largement au-dessus de la plaque la plus haute de la pile, par exemple au voisinage des extrémités supérieures des glissières. Elles peuvent être réalisées par tout moyen connu, par exemple, comme dans le cas illustré sur les figures 2 à 5, en déformant localement à chaud la matière plastique des glissières, de manière à faire apparaître les butées sur la face interne des glissières.According to the invention, the slides 30, 32 are provided with stops 42 intended to oppose the withdrawal of the plates upwards, without however preventing their sliding movement along the slides. For this purpose, the stops are arranged widely above the highest plate of the stack, for example in the vicinity of the upper ends of the slides. They can be produced by any known means, for example, as in the case illustrated in FIGS. 2 to 5, by locally deforming hot the plastic material of the slides, so as to reveal the stops on the internal face of the slides.

Dans le mode de réalisation de la figure 7, les butées sont constituées par des clous cannelés 44 fixés à travers la paroi des glissières et dont la pointe fait saillie sur la face interne de ces dernières.In the embodiment of Figure 7, the stops are constituted by grooved nails 44 fixed through the wall of the slides and whose tip protrudes from the internal face of the latter.

En faisant coulisser les plaques 26 vers le haut, comme représenté sur la figure 3, il devient possible de nettoyer les faces ainsi que les trous des plaques.By sliding the plates 26 upwards, as shown in FIG. 3, it becomes possible to clean the faces as well as the holes of the plates.

Afin de permettre l'observation des tubes à essais en place dans le portoir, sans avoir à les en retirer ou à soulever les plaques, chacune de ces dernières présente sur sa face inférieure au moins une saignée 46. Le contenu des tubes peut être observé à travers les saignées. Ces dernières ont également pour rôle de permettre une meilleure stabilité des plaqués. On conçoit en effet qu'il est plus simple d'obtenir un bon contact d'une plaque sur la plaque située au-dessous d'elle lorsque la surface de contact se réduit à celle des portions saillantes 48 définies de part et d'autre des saignées.In order to allow observation of the test tubes in place in the rack, without having to remove them or lift the plates, each of the latter has on its underside at least one groove 46. The contents of the tubes can be observed through the bloodletting. The latter also have the role of allowing better stability of tackles. It is in fact understood that it is simpler to obtain good contact of a plate on the plate situated below it when the contact surface is reduced to that of the projecting portions 48 defined on either side of the grooves.

Il va de soi que des modifications de détail peuvent être apportées au mode de réalisation décrit sans sortir du cadre de l'invention. Par exemple, les glissières 30, 32, les encoches 36, peuvent avoir toute autre forme de section qui s'oppose au retrait des plaques par écartement des glissières.It goes without saying that modifications of detail can be made to the embodiment described without departing from the scope of the invention. For example, the slides 30, 32, the notches 36, can have any other shape of section which opposes the withdrawal of the plates by spacing the slides.

Claims (8)

1. A carrier of the type comprising a plurality of stocked plates which are provided with holes and which are angularly oriented in such a way that their respective holes (40) are in mutual alignment, thus forming housings for receiving tubes (22), said plates being mounted slidably on two parallel arms of a U-shaped support ; said support (24) comprises a base portion (28) with a surface substantially equal to that of the plates (26) and two slide portions (30, 32) which are produced in one piece with the base portion and which are received in axial recesses (36, 38) formed at diametrally opposed positions on the edges of the plates, said slide portions being provided on their face which is inward with respect to the support, above the upper plate, with abutments (42) intended to prevent withdrawal of the plates or insertion of other plates into the support.
2. A carrier according to claim 1 characterised in that the abutments (42) are disposed markedly above the upper plate.
3. A carrier according to one of claims 1 and 2 characterised in that the abutments (42) are formed by local deformation of said slide portions (30, 32).
4. A carrier according to one of claims 1 and 2 characterised in that the abutments are formed by members which are fitted onto the slide portions.
5. A carrier according to claim 4 characterised in that said fitted members are formed by grooved studs (44) which are fixed on the slide portions and the tips of which project beyond the inward face of the slide portions.
6. A carrier according to one of the preceding claims characterised in that the slide portions (30, 32) and the recesses (36, 38) are of complementary sections which prevent the slide portions from moving away from each other, for example of a dovetail shape.
7. A carrier according to one of the preceding claims characterised in that the plates (26) are provided on their underneath face with at least one groove (46) permitting observation of the test tubes (22).
8. Process for assembly of the carrier according to one of the preceding claims characterised in that it comprises fitting onto the slide portions (30, 32) of the support a number of plates (26) such that the height of the stack of plates is slightly less than the height of the tubes (22) to be centrifuged, and then forming the abutments (42) on said slide portions.
EP86400337A 1985-02-19 1986-02-18 Test tubes support for a centrifuge, and its manufacturing method Expired EP0192571B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86400337T ATE41885T1 (en) 1985-02-19 1986-02-18 SAMPLE HOLDER FOR CENTRIFUGE AND METHOD FOR HIS MANUFACTURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8502358 1985-02-19
FR8502358A FR2577442B1 (en) 1985-02-19 1985-02-19 TUBE TEST RACK FOR CENTRIFUGE, AND MANUFACTURING METHOD THEREOF

Publications (3)

Publication Number Publication Date
EP0192571A2 EP0192571A2 (en) 1986-08-27
EP0192571A3 EP0192571A3 (en) 1987-06-03
EP0192571B1 true EP0192571B1 (en) 1989-04-05

Family

ID=9316412

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86400337A Expired EP0192571B1 (en) 1985-02-19 1986-02-18 Test tubes support for a centrifuge, and its manufacturing method

Country Status (4)

Country Link
EP (1) EP0192571B1 (en)
AT (1) ATE41885T1 (en)
DE (1) DE3662651D1 (en)
FR (1) FR2577442B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4242476C1 (en) * 1992-12-16 1994-08-11 Eppendorf Geraetebau Netheler Device for centrifuging samples
US6491615B1 (en) 2000-08-11 2002-12-10 Gentra Systems, Inc. Rotor locator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032066A (en) * 1976-03-15 1977-06-28 Beckman Instruments, Inc. Adapters for centrifuge rotors
US4389374A (en) * 1981-06-29 1983-06-21 Beckman Instruments, Inc. Centrifuge tube holder

Also Published As

Publication number Publication date
FR2577442A1 (en) 1986-08-22
EP0192571A3 (en) 1987-06-03
EP0192571A2 (en) 1986-08-27
ATE41885T1 (en) 1989-04-15
FR2577442B1 (en) 1987-03-20
DE3662651D1 (en) 1989-05-11

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