COVERING DEVICE FOR OPENINGS, IN PARTICULAR FOR MACHINE OPENINGS

摘要

A covering device for machine openings includes a shaft and a winding body which can be rotated relative to one another. A spring element is prestressed between the shaft and the winding body and is mounted by a first spring end to the winding body and by a second spring end to the shaft. A covering element can be wound and unwound onto the winding body to open and cover the opening, respectively. A coupling mechanism couples movement of the covering element to a rotational movement of the shaft. The coupling mechanism has at least one coupling wheel coupled to the shaft that has a profile which is engaged with a counter-profile on the covering element. The loading of the spring element is kept substantially constant by the coupling mechanism as the spring ends are displaced substantially synchronously during the winding and unwinding about the rotational axis.

主权项

1. A covering device for openings, comprising:
a winding unit having:
a shaft that is rotatable about a rotational axis;a winding body that is rotatable about the rotational axis; and,a spring element for producing a prestressing force (F) acting between the shaft and the winding body, wherein the spring element is mounted by a first spring end on the winding body and by a second spring end on the shaft; a covering element to cover an opening, wherein the covering element is wound onto the winding body to open the opening, and wherein the covering element is unwound from the winding body to cover the opening; and, a coupling mechanism for coupling a movement of the covering element to a rotational movement of the shaft, wherein the coupling mechanism has at least one coupling wheel coupled to the shaft, and wherein a profile of the at least one coupling wheel is engaged with a counter-profile arranged on the covering element.