| 摘要 |
<p>A scaffolding comprises elongate vertical members (6), elongate horizontal members (8) provided with connection members (12) by which the horizontal members may be connected to the upright members, and elongate diagonal braces (10) comprising mounting formations (42) adapted to be interfitted with receiving formations (32, 34) of the connection members (12). The mounting formation (42) is generally cylindrical, and is located substantially wholly within a cylindrical envelope containing the elongate portion of the brace, the longitudinal axis of the mounting formation intersecting the longitudinal axis of the elongate portion substantially at right angles, generally centrally of the mounting formation. The mounting formation is connected to the elongate portion by a cranked connection portion (44). The receiving formations (32, 34) are provided by bores (36), recesses being provided which open into the bores, in which recesses the connection portions (44) are located when the mounting formations (42) are positioned in the bores (36). This allows forces to be transmitted between the connection member (12) and the diagonal brace substantially on the longitudinal axis of the brace, over a range of angular articulation of the brace relative to the cross member. The connection member also comprises spaced limbs (14, 16) adapted to embrace a supporting formation (18) on the upright member, the limbs and supporting formation being provided with openings through which a wedge may be inserted to retain the cross member securely connected to the upright member. The opening of the upper limb is provided with a recess into which a projection (22) on the lower portion of the wedge (20) may extend, and an opening (26) extending from the recess (24), into which the lower end of the wedge may be located, a notch (28) being provided on the wedge which may be engaged with a corner (34) on the interior of the limb (14), to restrain inadvertent movement of the wedge from an inoperative position.</p> |
