Sample Preparer With Rotary Gripper

Abstract

A rotatable gripper serves to grip and turn a container cap. The gripper has a rotatably mounted collet clamp. In a locked operating position, the cap can be clamped and turned in the collet clamp, and in an unlocked operating position, the cap can be released from the collet clamp. The collet clamp is of an elongate configuration with a first and a second end, the first end comprising a substantially rigid section and the second end comprising a gripper section. The gripper section contains a substantially cylindrical recess that serves to hold the cap, wherein the recess is designed to expand in width when the operating position is changed from locked to unlocked. A clamping section is arranged between the gripper section and the rigid section of the collet clamp. The gripper section and the clamping section have an inside surface and an outside surface, wherein the outside surface of the clamping section has the shape of a cone whose width increases towards the gripper section). The cone is capable of being deformed, so that in the locked operating position the deformable cone can be compressed by means of a ring that is slidable on the cone, whereby the recess can be constricted in such a way that a container cap that is present in the recess can be clamped tight, and that in the unlocked operating position the recess can be widened in such a way that the cap can be removed from the recess.

Description

technical field [0001] The present invention relates to a rotatable gripper for opening and closing a rotatable container lid. The rotatable holder according to the invention is primarily intended for use in sample preparation systems. Background technique [0002] Sample preparation systems are used to prepare large quantities of samples that are filled into containers. Empty containers are set in the sample racks. To perform the filling operation, an empty container closed with a screw cap is picked up with a tool and placed on the load receiver of the balance. Next, the cap is removed and the desired amount of the desired substance is filled into the container, and the mass of the substance is measured by a balance. The container is then closed with a cap and returned to the sample rack. [0003] This describes the operation in which a rotatable gripper is used. A rotatable holder is placed in the substrate station. From there, the rotatable gripper is picked up by ...

AI Technical Summary

Problems solved by technology

Because the balance is highly sensitive, it is possible to trigger the balance's overload protection device, which can cause the zero point of the balance to shift

Therefore, subsequent measurements may be inaccurate

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