Autosampler having gripper with shape memory metal actuator

Details Autosampler having gripper with shape memory metal actuator Autosampler having gripper with shape memory metal actuator

G - Physics

01

N

G01N 35/10 (2006.01) B25J 9/10 (2006.01) B25J 15/08 (2006.01) G01N 35/00 (2006.01) G01N 35/02 (2006.01) G01N 35/04 (2006.01)

Patent

CA 2327486

An autosampler (10) include at least one specimen container tray (16), having a plurality of recesses (30) for receiving a specimen container (20), is removably fixed to a ground plate (15). A specimen container manipulating device (32) is positioned on top of the ground plate (15) and adjacent to the specimen container tray (16). The specimen container manipulating device (32) comprises a gripper comprising a gripper housing (34) and a plurality of gripping fingers (40, 42, 44). The gripping fingers (40, 42, 44) are held in place by a member (36) which is movable inside the gripper housing (34) between an upper and lower position. Shape memory metal (54) is positioned inside the gripper housing (34) and connected to the movable member (36) for controlling movement of the gripping fingers (40, 42, 44). When heat is applied to the shape memory metal (54), the shape memory metal (54) constricts, it moves the movable member (36) from the lower position to the upper position, causing the gripping fingers (40, 42, 44) to move from the closed position to the open position.

L'invention concerne un échantillonneur automatique (10) qui comprend au moins une platine porte-tubes d'échantillons (16) dans laquelle plusieurs évidements (30) sont ménagés pour recevoir chacun un tube d'échantillons (20) et qui est fixée de manière amovible à un socle (15). Un dispositif (32) de manipulation des tubes d'échantillons est positionné sur le sommet du socle (15) et adjacent à la platine (16). Ce dispositif (32) comprend un organe de préhension avec un carter (34) et plusieurs doigts de préhension (40, 42, 44). Ces derniers sont maintenus en position par un élément (36) qui peut se déplacer à l'intérieur du carter (34) entre une position supérieure et une position inférieure. Un métal à mémoire de forme (54) est positionné à l'intérieur du carter (34) et peut être relié à l'élément mobile (36) pour contrôler le déplacement des doigts (40, 42, 44). Lors de l'application de chaleur au métal à mémoire de forme (54), ce dernier se contracte, ce qui déplace l'élément mobile (36) de la position inférieure à la position supérieure, et amène les doigts (40, 42, 44) à passer d'une position fermée à une position ouverte.

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