| 主权项 |
1. Mechanical coupling arrangement for a scaffold, comprising;
a pole and a mounting collar having an attachment surface to which elongated support members can be attached, said pole being arranged within said mounting collar; wherein: said attachment surface is a radially and outwardly protruded part of the mounting collar, a level of radial play between said pole and said mounting collar in a first relative angular position is larger than the level of radial play between said pole and said mounting collar in a second relative angular position, wherein said mounting collar as a whole is rotated about an axis of said pole to move from the first relative angular position to the second relative angular position, said second relative angular position corresponds to a fastening position of said mounting collar relative to said pole, said first relative angular position corresponds to an axial sliding position of said mounting collar relative to said pole, said pole has an external surface having sliding surfaces with a cross-sectional shape of angularly spread segments of a circle having a first diameter, and attachment surfaces with a cross-sectional shape of angularly spread segments of a circle having a second diameter, wherein the first diameter is smaller than the second diameter, and the circle having the first diameter and the circle having the second diameter are concentric around the axis of the pole, said mounting collar has an internal surface having sliding surfaces with a cross-sectional shape of angularly spread segments of a circle having a third diameter, and attachment surfaces with a cross-sectional shape of angularly spread segments of a circle having a fourth diameter, wherein the fourth diameter is smaller than the third diameter, wherein said sliding surfaces of said pole face said attachment surfaces of said mounting collar and said attachment surfaces of said pole face said sliding surfaces of said mounting collar in said first relative angular position, and said attachment surfaces of said pole face said attachment surfaces of said mounting collar and said sliding surfaces of said pole face said sliding surfaces of said mounting collar in said second relative angular position; at least one fastener is provided securing said mounting collar to said pole in said second relative angular position, and said at least one fastener penetrating a wall of said mounting collar and engaging a wall of said pole in the second relative angular position, wherein said at least one fastener is selected from the group consisting of a screw, rivet, huck bolt, and pin. |
