EP2799147B1 - Laboratory centrifuge provided with means for locking the lid in the closed position thereof - Google Patents
Laboratory centrifuge provided with means for locking the lid in the closed position thereof Download PDFInfo
- Publication number
- EP2799147B1 EP2799147B1 EP14305648.9A EP14305648A EP2799147B1 EP 2799147 B1 EP2799147 B1 EP 2799147B1 EP 14305648 A EP14305648 A EP 14305648A EP 2799147 B1 EP2799147 B1 EP 2799147B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bolt
- rotation
- axis
- locking
- lid
- 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.)
- Not-in-force
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- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000005119 centrifugation Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000012550 audit Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
- B04B9/08—Arrangement or disposition of transmission gearing ; Couplings; Brakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/02—Casings; Lids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/02—Casings; Lids
- B04B7/06—Safety devices ; Regulating
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/0025—Devices for forcing the wing firmly against its seat or to initiate the opening of the wing
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
- E05B47/0012—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with rotary electromotors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
- B04B9/08—Arrangement or disposition of transmission gearing ; Couplings; Brakes
- B04B2009/085—Locking means between drive shaft and rotor
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B2047/0048—Circuits, feeding, monitoring
- E05B2047/0067—Monitoring
- E05B2047/0069—Monitoring bolt position
Definitions
- the present invention relates to the general field of laboratory centrifuges, allowing the separation of constituents contained in a liquid by centrifugation phenomenon.
- Centrifugation makes it possible to separate constituents of variable size and mass contained in a liquid sample, from molecules to whole cells.
- the acceleration obtained becomes preponderant with respect to the molecular agitation, which causes its sedimentation towards the bottom of the container or its rise to the surface.
- Such a centrifuge is further provided with locking means to maintain the lid in its closed position during the entire centrifugation cycle.
- Such locking means are for example described in the document FR-2 951 962 as well as in the document US 2001/024039 A1 .
- Such a structure allows a relatively effective locking of the bolt in its locking position.
- the hook of the bolt and the pivot bolt / connecting rod are positioned on either side of the pivot axis of the bolt, so that a lever arm may be exerted on the bolt is opposed to a lever arm capable of being exerted on said bolt / connecting rod pivot axis.
- This structure of the locking means is more cumbersome because of the presence of the connecting rod interposed between the bolt and the eccentric.
- This mechanism is also complex with regard to the number of parts, with reliability issues and maintenance of locking that result.
- the object of the present invention is to propose a centrifuge whose bolt actuation means have a simplified structure and increased reliability, compared to that of the prior art, while preserving an optimum locking force of the cover.
- This laboratory centrifuge is of the type comprising: - a casing surrounding a rotor which is accessible through an opening, - a cover movable between a closed position to close said access opening and an open position to release said access opening and - means for locking said lid in said closed position.
- These locking means comprise: at least one striker (preferably equipping said movable cover), at least one bolt (preferably equipping said casing), which is rotatably mounted about an axis of rotation between a position of locking in which said bolt is associated with said striker, and an unlocking position in which said bolt is dissociated from said striker, and - means for actuating said bolt comprising a motor shaft which is rotated on itself by means engines, along an axis of motor rotation extending parallel to the axis of rotation of said bolt, and which is coupled to said bolt via transmission means for the rotational operation of said bolt between its locking and unlocking positions .
- said transmission means comprise a crank, extending said drive shaft, which carries an eccentric actuator bearing on a contact surface provided on said bolt, so that the eccentric rotation drive of said actuator member actuation about said axis of motor rotation causes its movement and support along said contact surface and the rotational control of said bolt between its locking and unlocking positions.
- the laboratory centrifuge comprises, on the one hand, a first longitudinal axis passing through the actuating member and the axis of engine rotation and, on the other hand, a second longitudinal axis passing through said member of actuation and by the axis of rotation of the bolt.
- the locking means are then arranged so that, in the locking position of the bolt, said first longitudinal axis extends to the square, or at least approximately to the square, relative to the second longitudinal axis.
- This structural feature allows optimal and fast locking of the bolt in its closed position.
- the direction of a possible opening force exerted by the bolt on the actuating member then extends coaxially with the first longitudinal axis mentioned above, passing through the actuating member and the axis of rotation. engine.
- This direction of the opening force thus exerts a zero lever arm on the actuating member around the axis of engine rotation, with a zero moment on the motor axis, thus avoiding any rotation phenomenon of the associated motor shaft.
- This locking position is "wide” in that it allows a certain clearance, allowing better consideration of the inertia of geared motors and a simpler adjustment.
- the actuating member advantageously consists of a cylindrical stud which extends along a longitudinal axis oriented parallel to the axis of engine rotation.
- the contact surface of the bolt is then formed by an elongate slot which is formed in said bolt; this elongate light is delimited by two longitudinal edges extending parallel to each other and arranged on either side of a radial longitudinal axis arranged perpendicularly to the axis of rotation of said bolt.
- the holding means advantageously comprise at least one elastically deformable member which is arranged to rest on the striker of the cover operated in the waiting position, and which is able to oppose the action of the means of return the cover to the open position.
- the elastically deformable member is implanted opposite a hook of the bolt intended to cooperate with the striker.
- the bolt then advantageously comprises a bearing portion which is adapted, during the operation of the bolt in the unlocked position, to cause a maneuver of said elastic deformable member according to the inactive position in which it is spaced relative to the lock of the cover.
- the elastically deformable member is carried by the bolt, above a hook capable of cooperating with the striker.
- the laboratory centrifuge 1 represented generally and in perspective on the figure 1 , comprises a housing 2 incorporating a shielded tank 3 in which there is a rotor 4 removably mounted on a rotating drive shaft (not shown).
- the rotor 4 is intended to carry containers (tubes, bags, etc.) each receiving at least one liquid sample intended to undergo the centrifugation operations.
- the rotor 4, shown on the figure 1 is the type bucket rotor / mobile pods (designated in English “swing out” or “sw rotor”). These mobile buckets, not shown on the figure 1 , are each mounted free to rotate about an axis extending horizontally and perpendicularly to the axis of rotation of the rotor 4.
- the rotor 4 could be of the fixed angle type, in which the containers are placed in hollow recesses generally inclined between 15 ° and 45 ° with respect to the vertical.
- the casing 2 and the tank 3 delimit an access opening 5, opening upwards, for access in particular to the rotor 4.
- This casing 2 still carries a cover 6 mounted on hinges, for its pivoting along a horizontal axis of rotation 6 'between a closed position (not shown) to close the access opening 5 and an open position ( figure 1 ) to release this access opening 5.
- This cover 6 comprises return means 61 which tend its maneuver towards its open position ( figure 1 ).
- These return means 61 consist here for example of pneumatic cylinders, suitably arranged, exerting an upward thrust on the lid 6.
- the lid 6, at rest, is thus in its open position; downward support (by an operator) on the cover 6 allows to cause its operation from its open position to its closed position.
- the centrifuge 1 further comprises means 10 for locking the lid 6 moved in its closed position.
- safety means allow rotation of the rotor 4 only in the case where the cover 6 is in the closed and locked position.
- the closed and locked position of the lid 6 is, in practice, maintained as long as the rotor 4 is rotating within the vessel 3.
- These locking means 10 here comprise, on the one hand, two strikers 11 equipping the movable cover 6 and, on the other hand, two bolts 12 equipping the housing 2.
- the strikes 11 are formed at each end (or substantially at each end) of a free edge of the cover 6, opposite its edge rotatably mounted on the housing 2.
- latches 11 each comprise a stem 11a (visible in figures 1 and 7 ), extending parallel to the axis of rotation 6 'of the cover 6, intended to cooperate with one of the bolts 12.
- the two bolts 12 are part of a locking module 13, as shown in isolation on the Figures 2 and 3 , which is attached (advantageously removably) within the housing 2.
- This axis of rotation 14 of the bolts 12 is here parallel to the axis of rotation 6 'of the cover 6.
- the operating means 15 have a mechanical structure which, in spite of its relative simplicity and its compactness, is adapted to provide a maneuver precise and fast bolts 12 and to maintain optimal hold of these bolts 12 in the locked position.
- the operating means 15 are able to prevent any accidental movement of the bolts 12 from the locked position to the unlocked position.
- This phenomenon occurs in particular in the case where a thrust force is exerted on the cover 6 in the direction of its opening, in particular during an accidental detachment of the rotor 4 from its drive shaft, or accidental detachment of the rotor.
- a nacelle leading to its projection and percussion against the lid 6 at full speed.
- the second "slave" bolt 122 is coupled in rotation with this first bolt 121 by means of a transmission shaft 123 which extends coaxially with their common axis of rotation 14 ( Figures 2 and 3 ).
- These operating means 15 comprise a motor shaft 16 ( Figures 3 to 6 ) which is rotated on itself by motor means 16a ( Figures 2 and 3 ), for example a conventional electric motor per se, controlled by control means (for example electronic and / or software).
- the motor shaft 16 pivots about an axis of motor rotation 16 '( Figures 3 to 6 ) which extends parallel to the axis of rotation 14 of the bolts 12.
- This drive shaft 16 is coupled in rotation with a bolt 12, in this case the master bolt 121, via transmission means 17 described below.
- the corresponding bolt 121 consists of a plate having a median plane 12 'which extends perpendicularly to its axis of rotation 14 ( figure 3 ).
- the two front support portions 12 to 2 and 12 to 3 are each located in the extension of one of the branches of the notch 12 to 1 U-shaped.
- the contour of the elongated slot 12c constitutes a contact surface intended to cooperate with the transmission means 17.
- This elongate slot 12c here passes through the extension 12 b of the bolt 121 and extends in its median plane 12 '.
- this elongate light 12 c is here of generally oblong right shape. It consists of two longitudinal edges 12 c 1, 12 c 2 which extend parallel, and on either side, a radial longitudinal axis 12 c 3 passing through the axis of rotation 14 of the bolt 121 and arranged perpendicular to this axis 14.
- a first longitudinal edge "rear” 12 c 1 is a first side of the radial longitudinal axis 12 c 3, and is oriented in the same direction as the hook opening 12 a; and a second longitudinal edge "before" 12 c 2 is a second side of the radial longitudinal axis 12 c 3, and it is oriented away from the hook opening 12 a.
- the transmission means 17 comprise in turn a crank 18, a first end of which is connected to the aforementioned motor shaft 16, and a second end carries an actuating member 19, eccentric and extending along a longitudinal axis 19 '.
- the crank 18 here consists of a plate of generally oblong shape, extending in a plane which is perpendicular to the axis of engine rotation 16 'and which is parallel to the plane 12' of the bolt 121.
- the motor shaft 16 extends on the side of one of the two faces of this crank 18; and the actuating member 19 extends on the side of the other of the two faces of this crank 18.
- This crank 18 has a radial longitudinal axis 18 '( figure 6 ) which passes through the axis of motor rotation 16 'and the longitudinal axis 19' of the actuating member 19, and which extends perpendicularly to these two axes 16 ', 19'.
- the actuating member 19 here consists of a cylindrical stud whose longitudinal axis 19 'is oriented parallel to the axis of motor rotation 16'.
- This actuating member 19 is thus driven in eccentric rotation about the axis of motor rotation 16 ', this by the drive shaft 16 associated with the crank 18.
- This actuating member 19 is mounted through the elongated slot 12c of the bolt 121, perpendicularly to the center plane 12 'of the latter.
- This actuating member 19 corresponds here, with the clearance, to the width of the elongated light 12 c of the bolt 121 (corresponding to the distance between its longitudinal edges 12 c 1, 12 c 2 opposite).
- the actuating member 19 circulates and presses along the longitudinal edges 12 c 1, 12 c 2 of the elongated light 12 c of the bolt 121 (forming its surface contact) and, therefore, rotates this bolt 121 between its locking and unlocking positions as subsequently developed in connection with the Figures 7 to 11 .
- the centrifuge 1 also comprises means 25 for holding the lid 6 in a "semi-closed" waiting position.
- This position allows a stable correct positioning of the rod 11a of the latch 11 opposite the hook 12 a of the bolt 121, for the actuation of the bolt 121 in the locking position.
- These retaining means 25 consist here of a deformable member resiliently, which is located opposite the hook 12 a of the bolt 121 and is intended to cooperate with the keeper 11 received by the bolt 121.
- This elastically deformable member 25 is secured to the casing 2, at one of its ends.
- This elastically deformable member 25 here consists of a tongue or platinum semi-rigid, made of a metal or plastic material.
- the bolt 12 In unlock position ( figure 7 ), The bolt 12 has an inclination in which its hook 12 a is tilted backwards so as to release the descending trajectory tracking of the latch 11 complementary.
- the actuating member 19 is located here on the side of the proximal end 12 c 5 of the elongate slot 12c of the bolt 12.
- the striker 11 When maneuvering the lid 6 towards its closed position by an operator, the striker 11 is moved downwards in a circular trajectory centered on the axis of rotation 6 'of the lid 6.
- This striker 11 engages successively with the two parts 25 a, 25 b above the tongue 25, namely firstly the upper part 25 has, for its retraction during the passage of the rod 11a of the striker 11 and its lower part 25b , for its support above said rod 11 has striker 11.
- the elastically deformable member 25 rests on the strike plate 11 of the cover 6 which is then automatically maintained in a position called “standby" with the rod 11 has facing the hook 12 has ( figure 8 ).
- This deformable member 25 then opposes the action of the return means 61 of the lid 6 to the open position; the lower part 25b of the tongue 25 then exerts a retaining force which is greater than the thrust force exerted by the return means 61 of the cover 6 in the open position.
- the elastically deformable member 25 is thus automatically in an active position, to lock the cover 6 in this "semi-closed” waiting position.
- the control means are informed of the presence of the strikes 11 by appropriate detection means, conventional per se.
- the operator can then control the centrifuge 1 for rotating the rotor 4.
- the centrifuge 1 then automatically drives the bolts 12 in a hooking position with the strikers 11, corresponding to a maneuver of the bolts 12 in their locking position ( Figures 8 to 10 ).
- the operating means 15 move the bolts 12 in rotation about their axis of rotation 14, from the unlocking position to its locking position ( Figures 8, 9 and 10 ).
- the drive shaft 16 is pivoted to rotate the actuating member 19 about the axis of motor rotation 16 '(in a counter-clockwise rotation direction).
- Figures 8 to 10 the drive shaft 16 is pivoted to rotate the actuating member 19 about the axis of motor rotation 16 '(in a counter-clockwise rotation direction).
- the actuating member 19 then travels in a circular path around the axis of motor rotation 16 '. It also travels within the elongate slot 12c, while circulating and pressing along the contact surface formed by the rear longitudinal edge 12 c 1 ( figure 10 ).
- This action causes a rotation of the bolt 121 in a direction of rotation, here a direction of clockwise rotation, which is opposite to the direction of rotation of the actuating member 19.
- the bolt 12 then reaches its locking position, with its hook 12 is enclosing the striker 11 are complementary (in particular its stem 11 a).
- the upper support portion 12 2 of the hook portion 12a abuts on the elastically deformable member 25 so as to move it to an inoperative position, and thus take the place of the latter over the rod 11 has waste 11.
- This locking position of the bolt 12 is detected / determined by appropriate control means, conventional per se, comprising for example a sensor on the bolt 12 and a sensor on the striker 11 (the sensor is for example a pushbutton switch suitably arranged ).
- the control means then stop the rotation of the bolt 12, taking into account the signal emitted by the aforementioned control means.
- the structure of the locking mechanism is adapted so that the first longitudinal axis A1 extends at right angle, or at least approximately square, with respect to the second longitudinal axis A2 .
- approximately squared is meant a set of a few degrees, for example at most 5 °, for the angle formed between the longitudinal axes A1 and A2 above (thus included for example between 85 ° and 95 ° ).
- the locking portion 12 c 11 of the bolt 12 - is located in the first longitudinal axis A1 passing through the actuator 19 and the motor axis of rotation 16 ', and - extends at right angle or at at least approximately at right angles to this first longitudinal axis A1 .
- This locking portion 12 c 11 extends on either side of the first longitudinal axis A1 at right angles relative to the second longitudinal axis A2, for example over a length of 1 cm either side of this first axis A1 .
- the strikers 11 will then exert an upward pulling force, tending to rotate the associated bolts 12 to their unlocked position.
- the locking portion 12c of the bolt 11 "engine” 12, 121 will generate a thrust on the actuating member 19 force, this force extending coaxially to the first longitudinal axis A1 and axis longitudinal 18 'of the crank 18, towards the axis of motor rotation 16'.
- this thrust force generates no lever arm on the actuating member 19, and therefore a zero moment on the axis of motor rotation 16 '; no rotational force is then exerted on the associated crank 18.
- the operating means 15 cause the displacement of the actuating member 19 in eccentric rotation about the motor axis 16 ', in this case clockwise on the figure 11 .
- This actuating member 19 is thus caused to circulate and press along the longitudinal edge before 12 c 2, causing the rotation control of the bolts 12 associated.
- the return means 61 of the cover 6 act in such a way as to automatically cause the cover 6 to move to its open position ( figure 1 ).
- This unlocked position of the bolt 12 is detected / determined again by appropriate sensors, for example push contactors.
- This position of the bolts 12 is temporary. They are pivoted automatically, by the operating means associated with the control means, in the unlocking position with the holding means 25 in the active position according to the figure 7 .
- this unlocked position of the bolt 12 is detected / determined by appropriate sensors, for example push contactors.
- the operating means 15 according to the invention have the advantage of being particularly compact (reducing the number of parts), reliable and efficient, for the rapid control of the bolts 12 and also for maintaining in the locking position said bolts 12 with their respective latches 11.
- This feature particularly allows optimum resistance of these locking means 10 against the possible forces generated by a rotor 4 or a portion of the rotor 4 striking the cover 6, and then exerting traction on the latches 11 associated.
- This structure also has a relatively wide locking position, allowing better consideration of the inertia of geared motors and simpler adjustments.
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- Centrifugal Separators (AREA)
Description
La présente invention concerne le domaine général des centrifugeuses de laboratoires, permettant la séparation des constituants contenus dans un liquide par phénomène de centrifugation.The present invention relates to the general field of laboratory centrifuges, allowing the separation of constituents contained in a liquid by centrifugation phenomenon.
La centrifugation permet de séparer des constituants de taille et de masse très variables contenus dans un échantillon liquide, depuis des molécules jusqu'à des cellules entières.Centrifugation makes it possible to separate constituents of variable size and mass contained in a liquid sample, from molecules to whole cells.
En effet, la mise en rotation d'un rotor portant un récipient contenant cet échantillon liquide, génère une force centrifuge qui produit une accélération s'exerçant radialement vers l'extérieur de l'axe de rotation.Indeed, the rotation of a rotor carrying a container containing the liquid sample, generates a centrifugal force which produces an acceleration exerted radially outwardly of the axis of rotation.
Ainsi, pour un constituant donné, en choisissant correctement la vitesse de rotation, l'accélération obtenue devient prépondérante par rapport à l'agitation moléculaire, ce qui entraîne sa sédimentation vers le fond du récipient ou sa remontée en surface.Thus, for a given constituent, by correctly choosing the rotational speed, the acceleration obtained becomes preponderant with respect to the molecular agitation, which causes its sedimentation towards the bottom of the container or its rise to the surface.
Pour la mise en oeuvre de cette technique, on utilise une centrifugeuse de laboratoire comprenant :
- un arbre d'entraînement, associé à des moyens moteurs,
- un rotor monté de façon amovible sur ledit arbre d'entraînement, destiné à recevoir les échantillons de liquides à centrifuger,
- une cuve blindée entourant le rotor, délimitant une ouverture d'accès,
- un carter qui porte la cuve blindée, et
- un couvercle mobile entre une position fermée pour l'obturation de ladite ouverture d'accès et une position ouverte pour libérer ladite ouverture d'accès, ce couvercle étant porté et articulé sur le carter précité.
- a drive shaft, associated with driving means,
- a rotor removably mounted on said drive shaft, for receiving the samples of liquids to be centrifuged,
- a shielded tank surrounding the rotor, defining an access opening,
- a casing that carries the tank, and
- a cover movable between a closed position for closing said access opening and an open position to release said access opening, this cover being carried and hinged to the aforementioned casing.
Une telle centrifugeuse est encore munie de moyens de verrouillage pour assurer le maintien du couvercle dans sa position fermée pendant tout le cycle de centrifugation.Such a centrifuge is further provided with locking means to maintain the lid in its closed position during the entire centrifugation cycle.
Ces moyens de verrouillage doivent être adaptés en plus pour résister aux chocs produits par le rotor, ou le cas échéant par ses nacelles, en cas de séparation de l'arbre d'entraînement à pleine vitesse, et pour préserver ainsi le couvercle en position fermée.These locking means must be adapted in addition to withstand the shocks produced by the rotor, or if necessary by its nacelles, in case of separation of the drive shaft at full speed, and thus to preserve the lid in the closed position .
De tels moyens de verrouillage sont par exemple décrits dans le document
Ces moyens de verrouillage comprennent un pêne, équipant le carter, qui est associé à des moyens de manoeuvre pour son déplacement en rotation entre :
- une position de verrouillage dans laquelle un crochet dudit pêne est associé avec une gâche portée par le couvercle pour le maintien de ce dernier en position fermée, et
- une position de déverrouillage, dans laquelle le pêne est dissocié de ladite gâche pour autoriser la manoeuvre en pivotement du couvercle entre ses positions ouverte et fermée.
- a locking position in which a hook of said bolt is associated with a keeper carried by the cover to hold the latter in the closed position, and
- an unlocking position, in which the bolt is dissociated from said striker to allow the pivoting operation of the cover between its open and closed positions.
Les moyens de manoeuvre du pêne comprennent ici :
- un arbre moteur qui est entraîné en rotation selon un axe de rotation moteur s'étendant parallèlement à l'axe de rotation du pêne, et
- une bielle reliée, par une première de ses extrémités, audit pêne par l'intermédiaire d'un axe de pivotement et, par une seconde de ses extrémités, à un excentrique monté sur ledit arbre moteur.
- a motor shaft which is rotated about an axis of motor rotation extending parallel to the axis of rotation of the bolt, and
- a connecting rod connected by a first end thereof to said bolt via a pivot axis and, by a second end thereof, to an eccentric mounted on said motor shaft.
Une telle structure permet un verrouillage relativement efficace du pêne dans sa position de verrouillage.Such a structure allows a relatively effective locking of the bolt in its locking position.
Dans ce cadre, le crochet du pêne et l'axe de pivotement pêne/bielle sont positionnés de part et d'autre de l'axe de pivotement du pêne, de sorte qu'un bras de levier susceptible de s'exercer sur le pêne soit opposé à un bras de levier susceptible de s'exercer sur ledit axe de pivotement pêne/bielle.In this context, the hook of the bolt and the pivot bolt / connecting rod are positioned on either side of the pivot axis of the bolt, so that a lever arm may be exerted on the bolt is opposed to a lever arm capable of being exerted on said bolt / connecting rod pivot axis.
En outre, dans la position de verrouillage, il est nécessaire que l'axe de pivotement pêne/bielle, le point haut de l'excentrique et l'axe de rotation moteur soient alignés.In addition, in the locking position, it is necessary that the bolt / connecting rod pivot axis, the high point of the eccentric and the motor rotation axis are aligned.
Or, en pratique, cette nécessité d'un alignement précis de trois points différents des moyens de manoeuvre, rend une telle structure relativement complexe ; l'alignement des trois points est en plus relativement difficile à respecter du fait de l'inertie des motoréducteurs, avec un risque sur le maintien en position du verrouillage.Now, in practice, this need for precise alignment of three different points of the maneuvering means makes such a structure relatively complex; the alignment of the three points is in addition relatively difficult to respect because of the inertia of the geared motors, with a risk on maintaining the locking position.
Cette structure des moyens de verrouillage est en plus encombrante du fait de la présence de la bielle intercalée entre le pêne et l'excentrique. Ce mécanisme est également complexe au regard du nombre de pièces, avec les problèmes de fiabilité et de maintien du verrouillage qui en découlent.This structure of the locking means is more cumbersome because of the presence of the connecting rod interposed between the bolt and the eccentric. This mechanism is also complex with regard to the number of parts, with reliability issues and maintenance of locking that result.
La manoeuvre des pênes, par le biais d'une telle structure des moyens de verrouillage, s'avère en plus relativement lente.The operation of the bolts, through such a structure of the locking means, is also relatively slow.
La présente invention a pour objectif de proposer une centrifugeuse dont les moyens de manoeuvre du pêne présentent une structure simplifiée et une fiabilité accrue, par rapport à celle de l'art antérieur, tout en préservant une force de verrouillage optimale du couvercle.The object of the present invention is to propose a centrifuge whose bolt actuation means have a simplified structure and increased reliability, compared to that of the prior art, while preserving an optimum locking force of the cover.
Cette centrifugeuse de laboratoire est du type comportant - un carter entourant un rotor qui est accessible au travers d'une ouverture, - un couvercle mobile entre une position fermée pour obturer ladite ouverture d'accès et une position ouverte pour libérer ladite ouverture d'accès, et - des moyens pour le verrouillage dudit couvercle dans ladite position fermée.This laboratory centrifuge is of the type comprising: - a casing surrounding a rotor which is accessible through an opening, - a cover movable between a closed position to close said access opening and an open position to release said access opening and - means for locking said lid in said closed position.
Ces moyens de verrouillage comprennent : - au moins une gâche (équipant de préférence ledit couvercle mobile), - au moins un pêne (équipant de préférence ledit carter), qui est monté mobile en rotation autour d'un axe de rotation entre une position de verrouillage dans laquelle ledit pêne est associé avec ladite gâche, et une position de déverrouillage dans laquelle ledit pêne est dissocié de ladite gâche, et - des moyens de manoeuvre dudit pêne comprenant un arbre moteur qui est entraîné en rotation sur lui-même par des moyens moteurs, selon un axe de rotation moteur s'étendant parallèlement à l'axe de rotation dudit pêne, et qui est couplé audit pêne par l'intermédiaire de moyens de transmission pour la manoeuvre en rotation dudit pêne entre ses positions de verrouillage et de déverrouillage.These locking means comprise: at least one striker (preferably equipping said movable cover), at least one bolt (preferably equipping said casing), which is rotatably mounted about an axis of rotation between a position of locking in which said bolt is associated with said striker, and an unlocking position in which said bolt is dissociated from said striker, and - means for actuating said bolt comprising a motor shaft which is rotated on itself by means engines, along an axis of motor rotation extending parallel to the axis of rotation of said bolt, and which is coupled to said bolt via transmission means for the rotational operation of said bolt between its locking and unlocking positions .
Selon l'invention, lesdits moyens de transmission comprennent une manivelle, prolongeant ledit arbre moteur, qui porte un organe d'actionnement excentré en appui sur une surface de contact ménagée sur ledit pêne, de sorte que l'entraînement en rotation excentrée dudit organe d'actionnement autour dudit axe de rotation moteur provoque sa circulation et son appui le long de ladite surface de contact et le pilotage en rotation dudit pêne entre ses positions de verrouillage et de déverrouillage.According to the invention, said transmission means comprise a crank, extending said drive shaft, which carries an eccentric actuator bearing on a contact surface provided on said bolt, so that the eccentric rotation drive of said actuator member actuation about said axis of motor rotation causes its movement and support along said contact surface and the rotational control of said bolt between its locking and unlocking positions.
De manière générale, la centrifugeuse de laboratoire comporte, d'une part, un premier axe longitudinal passant par l'organe d'actionnement et par l'axe de rotation moteur et, d'autre part, un second axe longitudinal passant par ledit organe d'actionnement et par l'axe de rotation du pêne.
Selon une forme de réalisation préférée, les moyens de verrouillage sont alors agencés de sorte que, en position de verrouillage du pêne, ledit premier axe longitudinal s'étend à l'équerre, ou au moins approximativement à l'équerre, par rapport au second axe longitudinal.In general, the laboratory centrifuge comprises, on the one hand, a first longitudinal axis passing through the actuating member and the axis of engine rotation and, on the other hand, a second longitudinal axis passing through said member of actuation and by the axis of rotation of the bolt.
According to a preferred embodiment, the locking means are then arranged so that, in the locking position of the bolt, said first longitudinal axis extends to the square, or at least approximately to the square, relative to the second longitudinal axis.
Cette caractéristique structurelle permet un verrouillage optimal et rapide du pêne dans sa position fermée.This structural feature allows optimal and fast locking of the bolt in its closed position.
En effet, la direction d'une éventuelle force d'ouverture exercée par le pêne sur l'organe d'actionnement s'étend alors coaxialement au premier axe longitudinal précité, passant par l'organe d'actionnement et par l'axe de rotation moteur.Indeed, the direction of a possible opening force exerted by the bolt on the actuating member then extends coaxially with the first longitudinal axis mentioned above, passing through the actuating member and the axis of rotation. engine.
Cette direction de la force d'ouverture exerce ainsi un bras de levier nul sur l'organe d'actionnement autour de l'axe de rotation moteur, avec un moment nul sur l'axe moteur, évitant ainsi tout phénomène de rotation de l'arbre moteur associé.This direction of the opening force thus exerts a zero lever arm on the actuating member around the axis of engine rotation, with a zero moment on the motor axis, thus avoiding any rotation phenomenon of the associated motor shaft.
Cette position de verrouillage est « large » en ce qu'elle autorise un certain jeu, permettant une meilleure prise en compte de l'inertie des motoréducteurs et un réglage plus simple.This locking position is "wide" in that it allows a certain clearance, allowing better consideration of the inertia of geared motors and a simpler adjustment.
Dans ce cas, la surface de contact du pêne comporte avantageusement un tronçon de verrouillage qui, en position de verrouillage du pêne :
- se situe sur le premier axe longitudinal passant par l'organe d'actionnement et par l'axe de rotation moteur, et
- s'étend à l'équerre, ou au moins approximativement à l'équerre, par rapport, audit premier axe longitudinal.
- lies on the first longitudinal axis passing through the actuating member and the axis of motor rotation, and
- extends at right angles, or at least approximately square, with respect to said first longitudinal axis.
L'organe d'actionnement consiste avantageusement en un téton cylindrique qui s'étend selon un axe longitudinal orienté parallèlement à l'axe de rotation moteur. La surface de contact du pêne est alors formée par une lumière allongée qui est ménagée dans ledit pêne; cette lumière allongée est délimitée par deux bordures longitudinales s'étendant parallèlement, entre elles et disposées de part et d'autre d'un axe longitudinal radial agencé perpendiculairement à l'axe de rotation dudit pêne.The actuating member advantageously consists of a cylindrical stud which extends along a longitudinal axis oriented parallel to the axis of engine rotation. The contact surface of the bolt is then formed by an elongate slot which is formed in said bolt; this elongate light is delimited by two longitudinal edges extending parallel to each other and arranged on either side of a radial longitudinal axis arranged perpendicularly to the axis of rotation of said bolt.
Dans ce cas, le pêne comporte avantageusement :
- un crochet apte à coopérer avec la gâche, situé d'un côté de son axe de rotation, et
- un prolongement dans lequel est ménagée la lumière, situé d'un autre côté de son axe de rotation.
- a hook adapted to cooperate with the striker, located on one side of its axis of rotation, and
- an extension in which is formed the light, located on the other side of its axis of rotation.
Selon une autre caractéristique intéressante, le couvercle comporte avantageusement des moyens de rappel tendant à provoquer sa manoeuvre vers sa position ouverte ; et la centrifugeuse comporte encore des moyens de maintien du couvercle dans une position d'attente permettant un positionnement adapté de la gâche pour la coopération avec le pêne manoeuvré dans la position de verrouillage, lesquels moyens de maintien sont manoeuvrables entre deux positions :
- une position active, pour bloquer automatiquement le couvercle dans ladite position d'attente lors de sa manoeuvre de la position ouverte vers la position fermée, et
- une position inactive, obtenue par la manoeuvre du pêne dans la position de déverrouillage, dans laquelle les moyens de maintien sont inactivés pour autoriser l'action desdits moyens de rappel du couvercle en position ouverte.
- an active position, to automatically lock the cover in said standby position when operating from the open position to the closed position, and
- an inactive position, obtained by the operation of the bolt in the unlocking position, wherein the holding means are inactivated to allow the action of said lid return means in the open position.
Dans ce cas, les moyens de maintien comprennent avantageusement au moins un organe déformable élastiquement qui est agencé pour s'appuyer sur la gâche du couvercle manoeuvrée en position d'attente, et qui est apte à s'opposer à l'action des moyens de rappel du couvercle vers la position ouverte.In this case, the holding means advantageously comprise at least one elastically deformable member which is arranged to rest on the striker of the cover operated in the waiting position, and which is able to oppose the action of the means of return the cover to the open position.
Selon une première forme de réalisation, l'organe déformable élastiquement est implanté en regard d'un crochet du pêne destiné à coopérer avec la gâche.
Le pêne comporte alors avantageusement une partie d'appui qui est apte, lors de la manoeuvre du pêne en position de déverrouillage, à provoquer une manoeuvre dudit organe déformable élastique selon la position inactive dans laquelle il est écarté par rapport à la gâche du couvercle.According to a first embodiment, the elastically deformable member is implanted opposite a hook of the bolt intended to cooperate with the striker.
The bolt then advantageously comprises a bearing portion which is adapted, during the operation of the bolt in the unlocked position, to cause a maneuver of said elastic deformable member according to the inactive position in which it is spaced relative to the lock of the cover.
Selon une seconde forme de réalisation l'organe déformable élastiquement est porté par le pêne, au-dessus d'un crochet apte à coopérer avec la gâche.According to a second embodiment the elastically deformable member is carried by the bolt, above a hook capable of cooperating with the striker.
L'invention sera encore illustrée, sans être aucunement limitée, par la description suivante d'une forme de réalisation particulière, en relation avec les dessins annexés dans lesquels :
- la
figure 1 est une vue générale d'une centrifugeuse de laboratoire selon l'invention, dans laquelle le couvercle est représenté en position ouverte et dans laquelle une paroi avant du carter n'est pas représentée de manière à accéder visuellement aux moyens qui permettent le verrouillage de ce couvercle en position fermée ; - la
figure 2 représente, en perspective, les moyens de verrouillage de la centrifugeuse selon lafigure 1 ; - la
figure 3 est une vue de face des moyens de verrouillage selon lafigure 2 ; - la
figure 4 est une vue en coupe de lafigure 3 , selon un plan de coupe IV-IV passant par l'axe de rotation du pêne et s'étendant perpendiculairement à ce dernier ; - la
figure 5 est une vue partielle et agrandie de lafigure 4 , représentant son pêne et les moyens de manoeuvre associés ; - la
figure 6 est également une vue en coupe de lafigure 3 , selon un plan de coupe VI-VI passant par l'arbre moteur et s'étendant perpendiculairement à ce dernier ; - les
figures 7 à 10 correspondent à lafigure 5 , illustrant les principales étapes de la cinématique lors de la manoeuvre du pêne depuis sa position de déverrouillage jusqu'à sa position de verrouillage ; - la
figure 11 illustre le pêne en position de déverrouillage, dans laquelle une partie d'appui de ce pêne déplace, dans une position inactive, les moyens de maintien du couvercle dans une position d'attente.
- the
figure 1 is a general view of a laboratory centrifuge according to the invention, wherein the lid is shown in the open position and in which a front wall of the housing is not shown so as to visually access the means which allow the locking of this lid in closed position; - the
figure 2 represents, in perspective, the locking means of the centrifuge according to thefigure 1 ; - the
figure 3 is a front view of the locking means according to thefigure 2 ; - the
figure 4 is a sectional view of thefigure 3 , according to a section plane IV-IV passing through the axis of rotation of the bolt and extending perpendicular thereto; - the
figure 5 is a partial and enlarged view of thefigure 4 , representing his bolt and associated maneuvering means; - the
figure 6 is also a sectional view of thefigure 3 , along a VI-VI section plane passing through the motor shaft and extending perpendicular thereto; - the
Figures 7 to 10 correspond to thefigure 5 , illustrating the main steps of the kinematics during the operation of the bolt from its unlocking position to its locking position; - the
figure 11 illustrates the bolt unlocked position, wherein a bearing portion of the bolt moves, in an inactive position, the lid holding means in a waiting position.
La centrifugeuse de laboratoire 1 selon l'invention, représentée de manière générale et en perspective sur la
De manière classique, le rotor 4 est destiné à porter des récipients (tubes, poches, etc.) recevant chacun au moins un échantillon liquide destiné à subir les opérations de centrifugation.In a conventional manner, the
Le rotor 4, illustré sur la
De manière alternative, le rotor 4 pourrait être de type à angle fixe, dans lequel les récipients sont placés dans des logements creux généralement inclinés entre 15° et 45° par rapport à la verticale.Alternatively, the
Le carter 2 et la cuve 3 délimitent une ouverture d'accès 5, s'ouvrant vers le haut, pour l'accès notamment au rotor 4.The
Ce carter 2 porte encore un couvercle 6 monté sur des charnières, pour son pivotement selon un axe de rotation horizontal 6' entre une position fermée (non représentée) pour obturer l'ouverture d'accès 5 et une position ouverte (
Ce couvercle 6 comporte des moyens de rappel 61 qui tendent sa manoeuvre vers sa position ouverte (
Ces moyens de rappel 61 consistent ici par exemple en des vérins pneumatiques, convenablement agencés, exerçant une poussée vers le haut sur ce couvercle 6.These return means 61 consist here for example of pneumatic cylinders, suitably arranged, exerting an upward thrust on the
Le couvercle 6, au repos, se trouve ainsi dans sa position ouverte ; un appui vers le bas (par un opérateur) sur le couvercle 6 permet de provoquer sa manoeuvre de sa position ouverte vers sa position fermée.The
La centrifugeuse 1 comporte encore des moyens 10 pour le verrouillage du couvercle 6 déplacé dans sa position fermée.The centrifuge 1 further comprises means 10 for locking the
De manière classique, des moyens de sécurité autorisent une mise en rotation du rotor 4 uniquement dans le cas où le couvercle 6 est en position fermée et verrouillée. La position fermée et verrouillée du couvercle 6 est, en pratique, maintenue tant que le rotor 4 est en rotation au sein de la cuve 3.In a conventional manner, safety means allow rotation of the
Ces moyens de verrouillage 10 comprennent ici, d'une part, deux gâches 11 équipant le couvercle mobile 6 et, d'autre part, deux pênes 12 équipant le carter 2.These locking means 10 here comprise, on the one hand, two
Les gâches 11 sont ménagées à chaque extrémité (ou sensiblement à chaque extrémité) d'une bordure libre de ce couvercle 6, opposée à sa bordure montée en rotation sur le carter 2.The
Ces gâches 11 comportent chacune une tige 11a (visible sur les
Les deux pênes 12 font quant à eux partie d'un module de verrouillage 13, tel qu'illustré de manière isolée sur les
Ces deux pênes 12 sont mobiles en rotation simultanément autour d'un même axe de rotation 14, de sorte à coopérer chacun avec l'une des gâches 11 du couvercle 6 dans sa position fermée.These two
Cet axe de rotation 14 des pênes 12 est ici parallèle à l'axe de rotation 6' du couvercle 6.This axis of
Le module de verrouillage 13 est équipé de moyens de manoeuvre 15 pour le pilotage en rotation des pênes 12 entre deux positions de fin de course, à savoir :
- une position de verrouillage ou position verrouillée (
figure 10 ), dans laquelle les pênes 12 sont associés chacun avec une gâche 11, et - une position de déverrouillage ou position déverrouillée (
figure 7 notamment) dans laquelle les pênes 12 sont dissociés des gâches 11.
- a locked position or locked position (
figure 10 ), in which thebolts 12 are each associated with astriker 11, and - an unlock position or unlocked position (
figure 7 in particular) in which thebolts 12 are dissociatedstrikes 11.
Les moyens de manoeuvre 15 selon l'invention ont une structure mécanique qui, malgré sa relative simplicité et sa compacité, est adaptée à assurer une manoeuvre précise et rapide des pênes 12 et à exercer un maintien optimal de ces pênes 12 en position verrouillée.The operating means 15 according to the invention have a mechanical structure which, in spite of its relative simplicity and its compactness, is adapted to provide a maneuver precise and
En particulier, les moyens de manoeuvre 15 sont aptes à empêcher tout déplacement accidentel des pênes 12 de la position verrouillée vers la position déverrouillée.In particular, the operating means 15 are able to prevent any accidental movement of the
Ce phénomène survient en particulier dans le cas où une force de poussée est exercée sur le couvercle 6 dans le sens de son ouverture, notamment lors d'un détachement accidentel du rotor 4 de son arbre d'entraînement, ou d'un détachement accidentel d'une nacelle, conduisant à sa projection et sa percussion contre le couvercle 6 à pleine vitesse.This phenomenon occurs in particular in the case where a thrust force is exerted on the
Les moyens de manoeuvre 15 correspondants sont décrits ci-dessous en détails en relation avec les
Ces moyens de manoeuvre 15 coopèrent en particulier avec un premier pêne 121, formant ainsi un pêne « maître » (ou « moteur ») (
Le second pêne « esclave » 122 est accouplé en rotation avec ce premier pêne 121 par l'intermédiaire d'un arbre de transmission 123 qui s'étend coaxialement à leur axe de rotation 14 commun (
Ces moyens de manoeuvre 15 comprennent un arbre moteur 16 (
L'arbre moteur 16 pivote selon un axe de rotation moteur 16' (
Cet arbre moteur 16 est accouplé en rotation avec un pêne 12, en l'occurrence le pêne maître 121, par l'intermédiaire de moyens de transmission 17 décrits ci-après.This
Le pêne 121 correspondant consiste en une platine présentant un plan médian 12' qui s'étend perpendiculairement à son axe de rotation 14 (
Ce pêne 121 comporte deux parties, s'étendant de part et d'autre de son axe de rotation 14, à savoir :
un crochet 12a apte à s'accrocher sur l'une des gâches 11, situé approximativement d'un côté supérieur de l'axe derotation 14, etun prolongement 12b dans lequel est ménagée une lumière allongée 12c destinée à coopérer avec les moyens detransmission 17 précités, située approximativement d'un côté inférieur de sonaxe de rotation 14.
- a
hook 12 is adapted to catch on one of thelatches 11, situated approximately on an upper side of the axis ofrotation 14, and - an
extension 12b in which is provided anelongate slot 12c intended to cooperate with the above-mentioned transmission means 17 situated approximately on a lower side of its axis ofrotation 14.
Le crochet 12a comporte plusieurs parties, à savoir :
- une encoche 12a1, ici en forme générale de U, formant le crochet proprement dit destiné à recevoir la gâche 11, et
- deux parties avant d'appui, l'une supérieure 12a2 et l'autre inférieure 12a3, ménagées de part et d'autre de l'encoche 12a1 et destinées chacune à coopérer ici avec des moyens de maintien du couvercle qui seront décrits par la suite.
- a
notch 12 to 1, here in the general shape of U, forming the actual hook intended to receive thekeeper 11, and - two front support portions, one upper 12 to 2 and the other lower 12 to 3, formed on either side of the
notch 12 to 1 and each intended to cooperate here with means for holding the lid which will be described later.
Les deux parties avant d'appui 12a2 et 12a3 sont chacune situées dans le prolongement de l'une des branches de l'encoche 12a1 en forme de U.The two
Par ailleurs, le contour de la lumière allongée 12c constitue une surface de contact destinée à coopérer avec les moyens de transmission 17.Moreover, the contour of the
Cette lumière allongée 12c traverse ici le prolongement 12b du pêne 121 et elle s'étend dans son plan médian 12'.This
Tel qu'illustré sur la
Ce sont ces deux bordures longitudinales 12c1, 12c2 qui constituent, en pratique, la surface de contact, destinée à coopérer avec les moyens de transmission 17.These two
Une première bordure longitudinale « arrière » 12c1 se situe d'un premier côté de l'axe longitudinal radial 12c3, et elle est orientée dans la même direction que l'ouverture du crochet 12a; et une seconde bordure longitudinale « avant » 12c2 se situe d'un second côté de l'axe longitudinal radial 12c3, et elle est orientée à l'opposé de l'ouverture du crochet 12a.A first longitudinal edge "rear" 12 c 1 is a first side of the radial
La lumière allongée 12c du pêne 121 comporte encore deux extrémités opposées longitudinalement (
- une extrémité distale 12c4, localisée à distance de l'axe de
rotation 14, et - une extrémité proximale 12c5, située à proximité de ce même axe de
rotation 14.
- a
distal end 12c 4, located at a distance from the axis ofrotation 14, and - a
proximal end 12 c 5, situated close to the same axis ofrotation 14.
Les moyens de transmission 17 comprennent quant à eux une manivelle 18 dont une première extrémité est raccordée à l'arbre moteur 16 précité, et une seconde extrémité porte un organe d'actionnement 19, excentré et s'étendant selon un axe longitudinal 19'.The transmission means 17 comprise in turn a
La manivelle 18 consiste ici en une platine de forme générale oblongue, s'étendant dans un plan qui est perpendiculaire à l'axe de rotation moteur 16' et qui est parallèle au plan 12' du pêne 121.The crank 18 here consists of a plate of generally oblong shape, extending in a plane which is perpendicular to the axis of
L'arbre moteur 16 s'étend du côté de l'une des deux faces de cette manivelle 18 ; et l'organe d'actionnement 19 s'étend du côté de l'autre des deux faces de cette manivelle 18.The
Cette manivelle 18 présente un axe longitudinal radial 18' (
L'organe d'actionnement 19 consiste ici en un téton cylindrique, dont l'axe longitudinal 19' est orienté parallèlement à l'axe de rotation moteur 16'.The actuating
Cet organe d'actionnement 19 est ainsi entraîné en rotation excentrée autour de l'axe de rotation moteur 16', ceci par l'arbre moteur 16 associé à la manivelle 18.This actuating
Cet organe d'actionnement 19 est logé au travers de la lumière allongée 12c du pêne 121, perpendiculairement au plan médian 12' de ce dernier.This actuating
Le diamètre de cet organe d'actionnement 19 correspond ici, au jeu près, à la largeur de la lumière allongée 12c du pêne 121 (correspondant à la distance séparant ses bordures longitudinales 12c1, 12c2 en regard).The diameter of this actuating
Lors de sa rotation autour de l'axe de rotation moteur 16', l'organe d'actionnement 19 circule et appuie le long des bordures longitudinales 12c1, 12c2 de la lumière allongée 12c du pêne 121 (formant sa surface de contact) et, par conséquent, pilote en rotation ce pêne 121 entre ses positions de verrouillage et de déverrouillage tel que développé par la suite en relation avec les
Tel qu'illustré encore sur les
Cette position permet un positionnement correct stable de la tige 11a de la gâche 11 en regard du crochet 12a du pêne 121, en vue de la manoeuvre du pêne 121 dans la position de verrouillage.This position allows a stable correct positioning of the
Ces moyens de maintien 25 consistent ici en un organe déformable élastiquement, qui est implanté en regard du crochet 12a du pêne 121 et qui est destiné à coopérer avec la gâche 11 reçue par ce pêne 121.These retaining means 25 consist here of a deformable member resiliently, which is located opposite the
Cet organe déformable élastiquement 25 est solidarisé avec le carter 2, au niveau de l'une de ses extrémités.This elastically
Cet organe déformable élastiquement 25 consiste ici en une languette ou platine semi-rigide, réalisée dans un matériau métallique ou plastique.This elastically
Tel que développé ci-après, elle est en particulier agencée pour successivement s'escamoter puis s'appuyer, automatiquement, sur la tige 11a de la gâche 11 lors du déplacement du couvercle 6 de sa position ouverte à sa position fermée.As developed below, it is in particular arranged to successively retract and then press, automatically, on the
Cette languette 25 comporte pour cela :
- une partie supérieure 25a, formant rampe pour l'escamotage de la languette 25 lors du passage de la tige 11a de la gâche 11, et
- une partie inférieure 25b, pour son appui au-dessus de ladite tige 11a de la gâche 11.
- an
upper portion 25a, forming a ramp for the retraction of thetongue 25 during the passage of therod 11a of thestriker 11, and - a
lower part 25b , for its support above saidrod 11 has thestriker 11.
Le pilotage en rotation des pênes 12 entre leurs positions de verrouillage et de déverrouillage, par l'organe d'actionnement 19, est décrit plus en détail ci-dessous en relation avec les
En position de déverrouillage (
L'organe d'actionnement 19 se situe ici du côté de l'extrémité proximale 12c5 de la lumière allongée 12c du pêne 12.The actuating
Lors de la manoeuvre du couvercle 6 vers sa position fermée par un opérateur, la gâche 11 est déplacée vers le bas, selon une trajectoire circulaire centrée sur l'axe de rotation 6' du couvercle 6.When maneuvering the
Cette gâche 11 coopère successivement avec les deux parties 25a, 25b précitées de la languette 25, à savoir tout d'abord sa partie supérieure 25a, pour son escamotage lors du passage de la tige 11a de la gâche 11, puis sa partie inférieure 25b, pour son appui au-dessus de ladite tige 11a de la gâche 11.This
L'organe déformable élastiquement 25 s'appuie sur la gâche 11 du couvercle 6 qui est alors maintenu automatiquement dans une position dite « d'attente » avec la tige 11a en regard du crochet 12a (
Cet organe déformable 25 s'oppose alors à l'action des moyens de rappel 61 du couvercle 6 vers la position ouverte ; la partie inférieure 25b de la languette 25 exerce alors une force de retenue qui est supérieure à la force de poussée exercée par les moyens de rappel 61 du couvercle 6 en position ouverte.This
L'organe déformable élastiquement 25 est ainsi automatiquement dans une position active, pour bloquer le couvercle 6 dans cette position d'attente « semi-fermée ».The elastically
Les moyens de commande sont informés de la présence des gâches 11 par des moyens de détection appropriés, classiques en soi.The control means are informed of the presence of the
L'opérateur peut alors commander la centrifugeuse 1 pour la mise en rotation du rotor 4.The operator can then control the centrifuge 1 for rotating the
Les gâches 11 ayant été détectées, la centrifugeuse 1 pilote alors automatiquement les pênes 12 dans une position d'accrochage avec les gâches 11 complémentaires, correspondant à une manoeuvre des pênes 12 dans leur position de verrouillage (
Pour cela, les moyens de manoeuvre 15 déplacent les pênes 12 en rotation autour de leur axe de rotation 14, de la position de déverrouillage vers sa position de verrouillage (
A cet effet, l'arbre moteur 16 est pivoté pour entraîner en rotation l'organe d'actionnement 19 autour de l'axe de rotation moteur 16' (dans un sens de rotation anti-horaire sur les
L'organe d'actionnement 19 chemine alors selon une trajectoire circulaire autour de l'axe de rotation moteur 16'. Il chemine également au sein de la lumière allongée 12c, tout en circulant et appuyant le long de la surface de contact constituée par la bordure longitudinale arrière 12c1 (
Cette action provoque une rotation du pêne 121 dans un sens de rotation, ici un sens de rotation horaire, qui est inverse au sens de rotation de l'organe d'actionnement 19.This action causes a rotation of the
Le pêne 12 atteint alors sa position de verrouillage, avec son crochet 12a enveloppant la gâche 11 complémentaire (en particulier sa tige 11a).The
La partie d'appui supérieure 12a2 de la partie crochet 12a vient s'appuyer sur l'organe déformable élastiquement 25 de sorte à le déplacer vers une position inactive, et ainsi prendre la place de ce dernier au-dessus de la tige 11a de la gâche 11.The
Cette position de verrouillage du pêne 12 est détectée/déterminée par des moyens de contrôle appropriés, classiques en soi, comprenant par exemple un capteur sur le pêne 12 et un capteur sur la gâche 11 (le capteur est par exemple un contacteur à poussoir convenablement agencé).This locking position of the
Ces moyens de contrôle permettent ainsi de confirmer que les deux couples pêne 12 / gâche 11 sont en position de verrouillage.These control means thus make it possible to confirm that the two pairs of
Les moyens de commande stoppent alors la rotation du pêne 12, tenant compte du signal émis par les moyens de contrôle précités.The control means then stop the rotation of the
La position fermée du couvercle 6 est ainsi verrouillée par la coopération entre les pênes 12 et leurs gâches 11 complémentaires.The closed position of the
Tel qu'illustré par la
- un premier axe longitudinal A1 passant par l'axe longitudinal 19' de l'organe d'actionnement 19 et par l'axe de rotation moteur 16', correspondant encore ici à l'axe longitudinal radial 18' de la manivelle 18, et
- un second axe longitudinal A2 passant par l'axe longitudinal 19' de l'organe d'actionnement 19 et par l'axe de
rotation 14 des pênes 12, correspondant ici à l'axe longitudinal radial 12c3 de la lumière allongée 12c dupêne 12.
- a first longitudinal axis A1 passing through the longitudinal axis 19 'of the actuating
member 19 and the axis ofengine rotation 16', again corresponding here to the radial longitudinal axis 18 'of thecrank 18, and - a second longitudinal axis A2 passing through the longitudinal axis 19 'of the actuating
member 19 and through the axis ofrotation 14 of thebolts 12, here corresponding to the radiallongitudinal axis 12c 3 of theelongated slot 12 c of thebolt 12.
Dans cette position de verrouillage du pêne 12 selon la
Par « approximativement à l'équerre », on entend un jeu de quelques degrés, par exemple d'au maximum 5°, pour l'angle formé entre les axes longitudinaux A1 et A2 précités (compris ainsi par exemple entre 85° et 95°).By "approximately squared" is meant a set of a few degrees, for example at most 5 °, for the angle formed between the longitudinal axes A1 and A2 above (thus included for example between 85 ° and 95 ° ).
Toujours dans cette position de verrouillage du pêne 12, l'organe d'actionnement 19 est en appui sur une partie de la bordure longitudinale arrière 12c1, dite « tronçon de verrouillage 12c11 ».Still in this locking position of the
Le tronçon de verrouillage 12c11 du pêne 12 - se situe sur ce premier axe longitudinal A1 passant par l'organe d'actionnement 19 et par l'axe de rotation moteur 16', et - s'étend à l'équerre ou au moins approximativement à l'équerre, par rapport à ce premier axe longitudinal A1.The locking
Ce tronçon de verrouillage 12c11 s'étend de part et d'autre du premier axe longitudinal A1 à l'équerre par rapport au second axe longitudinal A2, par exemple sur une longueur de 1 cm de part et d'autre de ce premier axe A1.This locking
Une telle structure sécurise le verrouillage du couvercle 4.Such a structure secures the locking of the
En effet, si le rotor 4 ou une nacelle venait à se détacher accidentellement au cours d'une opération de centrifugation, cet objet projeté provoquerait alors une force sur le couvercle 4 tendant à sa manoeuvre vers sa position ouverte.Indeed, if the
Les gâches 11 vont alors exercer une force de traction vers le haut, tendant à manoeuvrer en rotation les pênes 12 associés vers leur position de déverrouillage.The
Dans ce cas, le tronçon de verrouillage 12c11 du pêne « moteur» 12, 121 va générer une force de poussée sur l'organe d'actionnement 19, cette force s'étendant coaxialement au premier axe longitudinal A1 et à l'axe longitudinal 18' de la manivelle 18, vers l'axe de rotation moteur 16'.In this case, the locking
Et du fait de cette direction et de ce sens, cette force de poussée ne génère aucun bras de levier sur l'organe d'actionnement 19, et par conséquent un moment nul sur l'axe de rotation moteur 16' ; aucune force de rotation ne s'exerce alors sur la manivelle 18 associée.And because of this direction and direction, this thrust force generates no lever arm on the actuating
Il en résulte un maintien en position particulièrement efficace du pêne 12, ce qui assure un blocage optimal des pênes 12 en position de verrouillage.This results in a particularly effective holding of the
Pour la manoeuvre en pivotement des pênes 12 depuis leur position de verrouillage vers leur position de déverrouillage (
Cet organe d'actionnement 19 est ainsi amené à circuler et à appuyer le long de la bordure longitudinale avant 12c2, provoquant le pilotage en rotation des pênes 12 associés.This actuating
Là encore, cette action provoque une rotation du pêne 121 dans un sens de rotation qui est inverse au sens de rotation de l'organe d'actionnement 19.Again, this action causes a rotation of the
Lors de cette manoeuvre, la partie d'appui inférieure 12c3 du crochet 12 est relevée, exerçant ainsi un rôle de levier sur l'organe déformable élastiquement 25 qui provoque son déplacement selon une position inactive dans laquelle il est écarté par rapport à la direction de cheminement de la gâche 11 du couvercle 6 vers sa position ouverte.During this maneuver, the
Les moyens de maintien 25 étant inactivés, les moyens de rappel 61 du couvercle 6 agissent de sorte à provoquer automatiquement le déplacement du couvercle 6 jusqu'à sa position ouverte (
Cette position déverrouillée du pêne 12 est détectée/déterminée là encore par des capteurs appropriés, par exemple des contacteurs à poussoir.This unlocked position of the
Cette position des pênes 12 est temporaire. Ils sont pivoter automatiquement, par les moyens de manoeuvre 15 associés aux moyens de commande, dans la position de déverrouillage avec les moyens de maintien 25 en position active selon la
Là encore, cette position déverrouillée du pêne 12 est détectée/déterminée par des capteurs appropriés, par exemple des contacteurs à poussoir.Again, this unlocked position of the
De manière générale, les moyens de manoeuvre 15 selon l'invention ont l'intérêt d'être particulièrement compacts (réduction du nombre de pièces), fiables et efficaces, pour le pilotage rapide des pênes 12 et aussi pour le maintien en position de verrouillage desdits pênes 12 avec leurs gâches 11 respectives.In general, the operating means 15 according to the invention have the advantage of being particularly compact (reducing the number of parts), reliable and efficient, for the rapid control of the
Cette particularité permet tout particulièrement une résistance optimale de ces moyens de verrouillage 10 à l'encontre des éventuels efforts engendrés par un rotor 4 ou une partie du rotor 4 percutant le couvercle 6, et venant alors exercer une traction sur les gâches 11 associées.This feature particularly allows optimum resistance of these locking means 10 against the possible forces generated by a
Cette structure présente en plus une position de verrouillage relativement étendue, permettant une meilleure prise en compte de l'inertie des motoréducteurs et des réglages plus simples.This structure also has a relatively wide locking position, allowing better consideration of the inertia of geared motors and simpler adjustments.
Claims (10)
- A laboratory centrifuge (1) including - a casing (2) surrounding a rotor (4) that is accessible through an opening (5), - a lid (6) mobile between a closed position to close said access opening (5) and an open position to clear said access opening (5), and - means (10) for the locking of said lid (6) in said closed position, which locking means (10) comprise:- at least one strike (11),- at least one bolt (12), which is mounted mobile in rotation about an axis of rotation (14) between a locking position in which said bolt (12) is associated with said strike (11), and an unlocking position in which said bolt (12) is dissociated from said strike (11), and- operating means (15) of said bolt (12) comprising a motor shaft (16) that is driven into rotation about itself by motor means (16a), according to a motor axis of rotation (16') extending parallel to the axis of rotation (14) of said bolt (12), and that is coupled to said bolt (12) through transmission means (17) for the rotational operation of said bolt (12) between its locking and unlocking positions,characterized in that said transmission means (17) comprise a crank (18), extending said motor shaft (16), which carries an actuating member (19) bearing on a contact surface (12c1, 12c2) formed on said bolt (12), so that the driving into eccentric rotation of said actuating member (19) about said motor axis of rotation (16') causes its circulation and bearing along said contact surface (12c1, 12c2) and the rotational control of said bolt (12) between its locking and unlocking positions.
- The laboratory centrifuge according to claim 1, characterized in that it includes, on the one hand, a first longitudinal axis (A1) passing through the actuating member (19) and through the motor axis of rotation (16'), and on the other hand, a second longitudinal axis (A2) passing through said actuating member (19) and through the axis of rotation of the bolt (14), and in that the locking means (10) are arranged so that, in the locking position of the bolt (12), said first longitudinal axis (A1) extends square, or at least approximately square, relative to the second longitudinal axis (A2).
- The centrifuge according to claim 2, characterized in that the contact surface (12c1, 12c2) of the bolt (12) includes a locking segment (12c11) that, in the locking position of the bolt (12):- is located on the first longitudinal axis (A1) passing through the actuating member (19) and through the motor axis of rotation (16'), and- extends square, or at least approximately square, with respect to said first longitudinal axis (A1).
- The centrifuge according to any one of claims 1 to 3, characterized in that the actuating member (19) consists in a cylindrical tenon that extends along a longitudinal axis (19') oriented parallel to the motor axis of rotation (16'), and in that the contact surface (12c1, 12c2) of the bolt (12) is formed by the contour of an elongated hole (12c) formed in said bolt (12), which elongated hole (12c) is delimited by two longitudinal edges (12c1, 12c2) extending parallel to, and on either side of, a radial longitudinal axis (12c3) arranged perpendicular to the axis of rotation (14) of said bolt (12).
- The centrifuge according to claim 4, characterized in that the bolt (12) includes:- a hook (12a) adapted to cooperate with the strike (11), located on one side of its axis of rotation (14), and- an extension (12b) in which is formed the elongated hole (12c), located on another side of its axis of rotation (14).
- The centrifuge according to any one of claims 1 to 5, characterized in that the strike(s) (11) equip the mobile lid (6), and in that the bolt(s) (12) equip the casing (2).
- The centrifuge according to any one of claims 1 to 6, characterized in that the lid (6) includes return means (61) tending to cause the operation thereof towards its open position, and in that said centrifuge (1) also includes means (25) for holding the lid in a waiting position allowing an adapted positioning of the strike (11) for the cooperation with the bolt (12) operated to the locking position, which holding means (25) are operable between two positions:- an active position, to automatically secure the lid (6) in said waiting position at the time of its operation from the open position to the closed position, and- an inactive position, obtained by the operation of the bolt (12) to the unlocking position, in which the holding means (25) are inactivated to allow the action of said means (61) for returning the lid (6) to the open position.
- The centrifuge according to claims 6 and 7 taken in combination, characterized in that the holding means (25) comprise at least one elastically deformable member that is arranged to bear on the strike (11) of the lid (6) operated to the waiting position, and that is adapted to act against the action of the means (61) for returning the lid (6) towards the open position.
- The centrifuge according to claim 8, characterized in that the elastically deformable member (25) is implanted opposite a hook (12a) of the bolt (12) intended to cooperate with the strike (11).
- The centrifuge according to claim 9, characterized in that the bolt (12) includes a bearing portion (12a3) that is adapted, during the operation of the bolt (12) to the unlocking position, to cause an operation of said elastic deformable member (25) to the inactive position in which it is spaced apart from the strike (11) of the lid (6).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1354027A FR3005274B1 (en) | 2013-05-02 | 2013-05-02 | LABORATORY CENTRIFUGE PROVIDED WITH MEANS FOR LOCKING A COVER IN ITS CLOSED POSITION |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2799147A1 EP2799147A1 (en) | 2014-11-05 |
EP2799147B1 true EP2799147B1 (en) | 2019-04-03 |
Family
ID=49546476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14305648.9A Not-in-force EP2799147B1 (en) | 2013-05-02 | 2014-04-30 | Laboratory centrifuge provided with means for locking the lid in the closed position thereof |
Country Status (3)
Country | Link |
---|---|
US (1) | US9669415B2 (en) |
EP (1) | EP2799147B1 (en) |
FR (1) | FR3005274B1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3005274B1 (en) * | 2013-05-02 | 2015-05-01 | Afi Centrifuge | LABORATORY CENTRIFUGE PROVIDED WITH MEANS FOR LOCKING A COVER IN ITS CLOSED POSITION |
DE102014008256B4 (en) * | 2014-06-06 | 2018-10-25 | Thermo Electron Led Gmbh | Centrifuge with automatically opening rotor lid |
EP3103555B1 (en) * | 2015-06-12 | 2018-05-09 | Sigma Laborzentrifugen GmbH | Laboratory centrifuge with damping device |
JP7049806B2 (en) * | 2017-10-27 | 2022-04-07 | エッペンドルフ・ハイマック・テクノロジーズ株式会社 | Centrifuge |
USD895137S1 (en) * | 2018-08-27 | 2020-09-01 | John Sheffield | Centrifuge |
JP7247143B2 (en) * | 2019-08-09 | 2023-03-28 | エッペンドルフ・ハイマック・テクノロジーズ株式会社 | Centrifuge |
US11788325B2 (en) * | 2019-09-18 | 2023-10-17 | Kyle Meziere | Method and apparatus for soft close trunk latch retrofit |
IT202000012172A1 (en) * | 2020-05-25 | 2021-11-25 | Bitron Spa | DEVICE FOR CLOSING THE DOOR OF AN APPLIANCE |
CN112252849A (en) * | 2020-09-24 | 2021-01-22 | 深圳市瑞沃德生命科技有限公司 | Door lock device and centrifuge |
WO2024015455A1 (en) * | 2022-07-12 | 2024-01-18 | Flacktek Speedmixer, Inc. | Integral locking apparatus using rotational force inflection and methods of use thereof |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3821840C1 (en) * | 1988-06-29 | 1989-10-19 | Heraeus Sepatech Gmbh, 3360 Osterode, De | |
DE4025134C1 (en) * | 1990-08-08 | 1991-11-14 | Eppendorf - Netheler - Hinz Gmbh, 2000 Hamburg, De | |
JP3879360B2 (en) * | 2000-03-17 | 2007-02-14 | 日立工機株式会社 | Centrifuge |
DE10015010C2 (en) * | 2000-03-22 | 2002-08-29 | Eppendorf Ag | Locking a lock with a housing |
US7040674B2 (en) * | 2004-02-09 | 2006-05-09 | Hti Technology & Industries, Corp | Powered latch assembly |
JP4645388B2 (en) * | 2005-09-26 | 2011-03-09 | 日立工機株式会社 | Centrifuge |
JP4609443B2 (en) * | 2007-02-28 | 2011-01-12 | 日立工機株式会社 | centrifuge |
JP4780044B2 (en) * | 2007-06-11 | 2011-09-28 | 日立工機株式会社 | centrifuge |
DE102008010272B4 (en) * | 2008-02-21 | 2013-08-22 | Thermo Electron Led Gmbh | Cover closure for housing cover of laboratory equipment and the like |
FR2951962B1 (en) * | 2009-11-04 | 2011-12-23 | Bms Internat | CENTRIFUGE PROVIDED WITH A COVER AND SECURED LOCKING MEANS OF THE COVER IN CLOSURE POSITION |
FR2951964B1 (en) | 2009-11-04 | 2012-04-06 | Bms Internat | CENTRIFUGE COMPRISING VISUAL AND / OR TOUCH-INDICATING MEANS FOR CORRECT MOUNTING OF THE ROTOR ON THE DRIVE SHAFT, AND CORRESPONDING ROTOR |
EP2336628B9 (en) * | 2009-12-16 | 2013-08-14 | Eppendorf Ag | Lock fastener |
DE202012001077U1 (en) * | 2012-02-03 | 2012-03-02 | Sigma Laborzentrifugen Gmbh | lid lock |
FR3005274B1 (en) * | 2013-05-02 | 2015-05-01 | Afi Centrifuge | LABORATORY CENTRIFUGE PROVIDED WITH MEANS FOR LOCKING A COVER IN ITS CLOSED POSITION |
-
2013
- 2013-05-02 FR FR1354027A patent/FR3005274B1/en active Active
-
2014
- 2014-04-30 US US14/265,636 patent/US9669415B2/en active Active
- 2014-04-30 EP EP14305648.9A patent/EP2799147B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
FR3005274A1 (en) | 2014-11-07 |
US20140329659A1 (en) | 2014-11-06 |
US9669415B2 (en) | 2017-06-06 |
EP2799147A1 (en) | 2014-11-05 |
FR3005274B1 (en) | 2015-05-01 |
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