| 摘要 |
1,023,921. Scaffolding lattice girders grandstands. H. S. EVANS. March 12, 1962 [March 17 1961], No. 9829/61. Headings E1A, E1K and E1S. A unit for constructing scaffolding comprises an upright 15, Fig. 2, having a spigot 18 at one end, a socket 20 at the other for receiving the spigot of another unit and extending from the stem, an arm 24 having on its free end a lug 23 for engagement with sockets 21 on the upright of another unit. The arm may be inclined to the upright or a second arm may extend from the upright forming a T-shaped member or two arms may extend from the same side. Each arm has a brace 17. Scaffolding erected from these units are described, L and T-shaped units being arranged alternately above one another on opposite sides of adjacent storeys of the scaffold. The scaffold is mounted on adjustable base plates on which are mounted base members comprising an upright, Fig. 4 (not shown) having a top socket for a spigot 18 of a scaffold unit and one or two horizontal arms 16 carrying lugs 23 adapted to engage sockets 21 on the scaffold units and having sockets on the upright. The lugs and sockets are secured together by captive pins, Fig. 8 (not shown). Scaffolding comprising towers bridged across at the top is described, Fig. 12 (not shown). A diagonal tie for bracing the scaffolding, Fig. 6 (not shown) has transverse lugs 23 at the ends. A brace, Fig. 7 (not shown) comprises parallel tubes with lugs at their ends and connected by two crossing diagonals and another brace Fig. 10 (not shown) is triangular with a lug at each corner. Posts for use in constructing the scaffolding comprise a tube of square cross section with a spigot at one end and sockets such as 22 at both ends or intermediately. Upper and lower parts of the scaffolding are connected and made relatively adjustable by a post 70, Fig. 11, the lower end of which is adapted to be inserted in a socket 20 until a collar 76 held in position by a threaded collar 74, rests on the socket. A support for a water tank, a grandstand and a bridge constructed of these units are described the bridge also including a beam comprising uprights 15, Fig. 9, having spigots 18 at the lower end and sockets 22 and booms 45, 46 and braces 47, the beam being extended at one end by an arm 24 and a brace 17. Sockets 21 may be replaced by blocks and the lugs 23 by outwardly facing channels engaging over the blocks both having holes for securing pins. The lugs 23 may also be replaced by a pivoted lever 101, Fig. 23, having hooked ends and adapted to engage in channels 103, 106 on scaffold units and be secured by a pin 105 or a screw 107. |
