Conveyor of specimen containers with spur units in laboratory automation systems
It is described a conveyor of specimen containers ( 9 ) supported by carriers ( 8 ) in laboratory automation systems comprising at least one analyzer ( 10, 50, 60 ). Said conveyor comprising a main transport unit ( 2 ), at least one spur transport unit ( 4 - 5, 7 ) allowing the positioning of the specimen container ( 9 ) inside said at least one analyzer ( 10, 50, 60 ) without removing said specimen container ( 9 ) from its carrier ( 8 ).
1. A conveyor for conveying a plurality of carriers, each carrier supporting single specimen containers in a laboratory automation system, said laboratory automation system containing analyzers, comprising:
a main transport unit connected by connecting portions to spur transport units suitable to convey said carriers to sampling positions inside analyzers associated with one of said spur transport units, the spur transport units structurally separated from said analyzers, said main transport unit being provided with a main driving belt,
each spur transport unit being provided with a going driven belt and a return driven belt disposed substantially parallel to each other,
wherein each spur transport unit has different dimensions and each analyzer has a recess having dimensions corresponding to the dimensions of the spur transport unit associated with the analyzer,
said connecting portions including an identifying device, a diverting device, a secondary belt disposed substantially parallel to said main driving belt, and a guide which ships carriers on the going driven belt of each spur transport unit not disposed parallel to said secondary belt,
each spur transport unit allowing the positioning, by a blocking member actuated by the identifying device of the specimen container in the sampling position inside the analyzer, without removing the specimen container from a carrier, and
each spur transport unit being provided with a reverse running device, including a friction disc interacting with said going driven belt and with said return driven belt to return the carriers supporting the analyzed containers back to the connecting portions and to the main transport driving belt.
2. The conveyor according to claim 1 , wherein the reverse running device comprises a disc mounted on a vertical screw shaft with a vertical traction spring that creates friction between an upper surface of the going and return belts and a bottom surface of the disc due to the rotation of the disc and the opposite motion of the parallel, adjacent belts.
3. The conveyor according to claim 1 , wherein the spur unit comprises a disc spur unit, a straight spur unit or an “L” spur unit.