Arrangement for detachable joining of construction parts

Apparatus, comprising

• a first construction part,
• a second construction part,
• said first construction part being constructed for being detachably connected in a connected position to a second construction part by a connection end on the first part being located in a connection opening on the second part,
• said connection end having a tubular portion being non-round in cross section, having two longitudinal slots extending approximately parallel with each other and with the tubular axis, and having an open outer end on each slot,
• said second construction part extending in connected position at an angle to the first construction part, being solid in cross section, and having said connection opening, corresponding in cross-sectional shape to the tubular portion of the connection end of the first construction part for the telescopic engagement of the first construction part into the second construction part, and
• a set of clamping pieces having their outer surfaces constructed to telescopically receive said tubular portion and the slotted end of the first construction part, and having inner wedge surfaces,
• a tension wedge having a central threaded bore and wedging outer surfaces engaging the wedge surfaces of said clamping pieces, and
• a screw screwed into the threaded bore in the tension wedge, supported by its head end operatively bearing against the clamping pieces, and having its threaded shank locatable within the inside of the tubular bore and the connection end of the first construction part.