JOINING DEVICE

摘要

A joining device for end joining at least two members of a frame is provided. Each frame member has a front surface, a bevelled joining surface on an end of the frame member and a cavity of trapezoidal cross-section extending along a portion of the longitudinal axis of the frame member. The broadest portion of the trapezoid is located closest to the front surface of each frame member. The cavity is exposed at the bevelled joining surface. The joining device includes at least two insertion portions of trapezoidal cross-section which are oriented with respect to each other according to a first angle which determines the angle between the frame member, whereby the bevelled joining surfaces of the frame members become contiguous when the insertion portions of the joining device have been inserted longitudinally into the frame members.