Importance

Loading Importance Indicators...

Abstract

A collapsible framework comprises a plurality of spars pivotally connected with hub members. The hub members comprise a first set which are disposed at the front of the framework when erected and a second set which are disposed at the rear of the erected framework, each of said spars being connected at one end with a hub member of the first set and at the opposite end with a hub member of the second set, and the spars being pivotally connected in pairs. The arrangement is such that each hub member of the first set is opposite a respective hub member of the second set and moves nearer to its opposite hub member as the framework is moved from a collapsed to an erected state and moves further from its opposite hub member as the framework is moved from its collapsed to its erected state. Opposite hub members of the first and second sets are connected by tension springs which assist in the unfolding and erection of the framework and provide the forces necessary to hold the frame in its erected position. Vertical braces are detachably connectable between the hub members after the framework has been erected to maintain the framework in position when loaded. These braces are themselves collapsible and are of iron or steel to allow cladding sheets having magnetic securing devices to be fitted to these vertical braces.

Loading the Abstract Image...

First Claim