DEVICE FOR ENSURING OR PREVENTING ACCESS TO HIDDEN UTILITIES OF ROOMS AND BUILDINGS

摘要

This invention can be used in a device for ensuring or preventing access to any structure such as a cavity, a niche, a cabinet, a body of an installation or of a machine during assembly works, the planning of man passages, the use and service of various utilities or equipment, during loading operations, etc. The invention allows to ensure a larger opening of the passages, to reduce the technical gap permitting the displacement of an opening element, to increase the load capacity of the opening element and to improve the reliability of technical operations carried out by lifting. The inventive device includes at least one opening element, hingely suspended on a framework limiting the passage or on elements of a passage, as well as rigid joints; at least one opening element is suspended to be able to move in a parallel plane and to effect rotary movements in one or several directions by means of one or several rigid joints which form a group with an opening element; a plurality of these groups can be used differentially, wherein each point of the opening element is constantly in the same plane perpendicular to the axes of rotation of the hinge pairs.