Clamping device for clamping a plurality of columns for sample preparation

Clamping device for clamping at least two columns For sample preparation, the clamping device having at least three clamping blocks retained in a row one behind the other on a guiding rail, wherein first and second clamping blocks of the least three clamping blocks are slidingly displaceable clamping blocks and are connected to a displacement mechanism for displacing the slidingly displaceable clamping blocks between an open position and a clamping position, wherein, in the open position, the at least two columns can be inserted in an axial direction one behind the other between the clamping blocks, and, in the clamping position, the columns are clamped in an axial direction one behind the other between the clamping blocks, in order to produce a fluid connection between the column and at least one of the clamping blocks, wherein

• the slidingly displaceable clamping blocks interact with the displacement mechanism through coupling means in such a mariner that an actuation of the displacement mechanism from the clamping position into the open position brings about a displacement of all the slidingly displaceable clamping blocks and the columns are released, wherein the coupling means are formed by a rod having carrier elements, wherein the carrier elements come into contact with the clamping blocks only in the direction from the clamping position into the open position, such contact serving to carry the clamping blocks in the direction from the clamping position to into the open position.