Coupling for the detachable connecting of two coaxial pipes and carrying column for a room divider containing the coupling

Coupling for the detachable connecting of two coaxial pipes (2, 3) of the same cross section, which both have adjacent to their face surfaces (4) two diametrically oppositely lying breakthroughs (5), characterized in that the coupling (1) consists of a first coupling part (6) intended to be inserted into the end of the one pipe (2) and a second coupling part (7) intended to be inserted into the end of the other pipe (3), that the first coupling part (6) comprises a bushing (10) with at least two radially resilient rest lugs (16) for snapping into the breakthroughs (5), a coupling bolt (11) turnable about the coupling axis (8), extending along this axis (8), as well as a coaxial ring (12) jointed secure against turning with the coupling bolt (11) with a radial support shoulder (32) on both sides for abutting against the two face surfaces (4) of the pipes, a centering protrusion (33) on both sides insertable in the respective pipe end and with wrench engagement elements (34) between the support shoulders (32), that the coupling bolt (11) abuts with a head (26) turnably on the bushing (10) and carries at the opposite end a crosspiece (45) the width of which is less than the width of an axial oblong hole (46) in the second coupling part (7), which presents further radially resilient rest lugs (42) for snapping into the breakthroughs (5) of the other pipe (3), in which system after sliding of the crosspiece (45) through the oblong hole (46) and after the turning of the coupling bolt (11) the crosspiece (45) grips behind the second coupling part (7).