Connector for a framework structure

A framework connector comprises a main body having a hemispherical surface with a plurality of non-circular projections extending outwardly from the hemispherical surface. Each of the projections have at least three longitudinally extending, circumferentially spaced land areas. Two of the three land areas are relatively closely spaced and define a projection surface therebetween. Another of the land areas is located opposite the projection surface. A post extends vertically outward from the projection surface. Each connector includes an elongate tubular member for connecting one connector to another connector. The tubular member has an inner diameter selected to slidingly engage the land areas of the projection when the member is inserted over a projection. The tubular member has a hole for receiving the post for releaseably coupling the member to the connector.