| 主权项 |
1. A container treatment device for expanding pre-forms into containers, having at least one blow moulding device for introducing of a flowable medium under pressure into an inner space of the pre-form, and at least one stretching device for stretching the pre-form during an expansion procedure, wherein the blow moulding device has at least one blow moulding nozzle piston and the stretching device has at least one stretch rod which is movable at least in sections and at least for a time through a through opening of the blow moulding nozzle piston in a translational manner and which is operatively connected to at least one portion of a stretch rod drive device, wherein at least one stretch rod bearing element is arranged in the region of the through opening in order to guide the stretch rod, and wherein a coupling device is arranged between the stretch rod and the stretch rod drive device, wherein the coupling device has at least one rotor coupling element and one stretch rod coupling element, wherein the rotor coupling element has at least one first force absorption side and at least one first force delivery side and the stretch rod coupling element has at least one first force absorption side and at least one first force delivery side, and wherein the rotor coupling element is arranged at least in sections in a recess of the stretch rod coupling element, wherein the recess is made larger at least region by region at least in a peripheral direction which extends at a right angle to the direction of movement of the stretch rod than a periphery of the rotor coupling element which extends at a right angle to the direction of movement of the stretch rod, in order to allow at least a limited movement of the rotor coupling element in the direction which extends at a right angle to the direction of movement of the stretch rod. |
