Elastically-deformed adjustable T-joint

A frame comprising:

• at least two sectional elements which are detachably interconnected and adapted to be pressed against each other, a first sectional element being of a double-walled construction and having webs, said webs connecting an inner section part of said first sectional element to an outer section part of said first sectional element, and said first sectional element further having longitudinal channels, longitudinal slots and vanes, said vanes being separated from each other by said longitudinal channels;
• and a bolt, which is anchored in one of the longitudinal slots, rotatably and longitudinally displaceably mounted in a second sectional element, said bolt presses said vanes against an end face of said second sectional element;
• said end face of said second sectional element and an outer surface of said first sectional element are differently shaped in such a manner that when said sectional elements are clamped together by said bolt, the end face bears against the outer surface of said first sectional element along lines of contact and rotation of the sectional elements relative to each other is prevented, further clamping causes said vanes to bear against said end face of said second sectional element by becoming elastically deformed, said end face of said second sectional element is curved and said first sectional element is a round sectional bar, the radius of said first sectional element being greater than the radius of curvature of the end face of said second sectional element, and said bolt is formed as an anchoring means and, through two projections formed thereon, presses the vanes against the end face of said second sectional element, the vanes becoming elastically deformed at least in tapered zones.

A frame comprising:

• at least two sectional elements which are detachably interconnected and adapted to be pressed against each other, a first sectional element being of a double-walled construction and having webs, said webs connecting an inner section part of said first sectional element to an outer section part of said first sectional element, and said first sectional element further having longitudinal channels, longitudinal slots and vanes, said vanes being separated from each other by said longitudinal channels;
• and a bolt, which is anchored in one of the longitudinal slots, rotatably and longitudinally displaceably mounted in a second sectional element, said bolt presses said vanes against an end face of said second sectional element;
• said end face of said second sectional element and an outer surface of said first sectional element are differently shaped in such a manner that when said sectional elements are clamped together by said bolt, the end face bears against the outer surface of said first sectional element along lines of contact and rotation of the sectional elements relative to each other is prevented, further clamping causes said vanes to bear against said end face of said second sectional element by becoming elastically deformed, said end face having two part-faces which slope toward each other to form an acute angle, said first sectional element being a sectional bar of square cross-section, the longitudinal channels and the longitudinal slots in the sectional bar are disposed at corners thereof, said vanes being in the form of rails, and a countersunk head of the bolt, which fits in the longitudinal slot, pulls the rails against the end face of said second sectional element.

A frame comprising:

• at least two sectional elements which are detachably interconnected and adapted to be pressed against each other, a first sectional element being of a double-walled construction and having webs, said webs connecting an inner section part of said first sectional element to an outer section part of said first sectional element, and said first sectional element further having longitudinal channels, longitudinal slots and vanes, said vanes being separated from each other by said longitudinal channels;
• and a bolt, which is anchored in one of the longitudinal slots, rotatably and longitudinally displaceably mounted in a second sectional element, said bolt presses said vanes against an end face of said second sectional element;
• said end face of said second sectional element and an outer surface of said first sectional element are differently shaped in such a manner that when said sectional elements are clamped together by said bolt, the end face bears against the outer surface of said first sectional element along lines of contact and rotation of the sectional elements relative to each other is prevented, further clamping said vanes to bear against said end face of said second sectional element by becoming elastically deformed, said second sectional element is provided with a first and a second cavity, each of said cavities having a square cross-section, and each of said cavities extending in a lateral direction, and a transverse bore, said transverse bore passing through each of said cavities;
• a rod of square cross-section having a screw-threaded bore lies in said first cavity and is secured in position by a screw, said screw passing through each of said bores;
• and, a clamping element clamped in the second cavity, the bolt, which is inserted into said second cavity, presses a spring against said clamping element, and a conical tip of said screw engages a conical recess in said bolt.