| 摘要 |
<p>The invention concerns devices for assembling a hollow tube (1) with square-shaped internal section with a base element (2). This device is characterised in that it comprises an oblong cylindrical axis cam (11), with square transverse section whose diagonal is of dimension slightly larger than that of one side of the tube (1) internal section, the corners (14, 15) of the cam section being rounded, a groove (20) provided in the cam (10) along an axis (22) perpendicular to the axis (11) and comprising a base (21) parallel to the axis (11), a wedge (30) located in the groove (20), defined in a piece delimited by two parallel planes (31, 32), plane (31) being mounted sliding on the base (21) of the groove and plane (32) being arranged for coming into contact on one side (36) of the internal section of the tube (1), the wedge (30) section being substantially trapezoid defined such that it fits in the internal corner (33) of the hollow tube. The invention is useful for building all types of constructions such as stalls, platforms, exhibition stands and the like.</p> |
