| 摘要 |
1498734 Scaffold clamp A J CHAPMAN 6 May 1976 [21 May 1975] 21897/75 Heading E2B A scaffold clamp comprises a casting having three bores 2, 3, 4 extending therethrough mutually at right angles for receiving tubes 5, 6, 7 respectively and a tapered clamping bolt 8 which extends through the middle of the clamp and can be tightened by a nut 9. The head portion 10 of the bolt 8 is received in an aperture which extends into each of the bores 2, 3, 4 such that when the head portion is pulled into the aperture the flats 11 engage against the tubes 5, 6, 7 to clamp them. The wall of the bore 2 houses a grub screw 12 for locking the clamp on tube 5 during erection. A clamp to accommodate square section tubes is also described. A further embodiment for clamping only two tubes is shown in Figs. 5 and 6. The tapered bolt may also incorporate knife edges to bite into the tubes being clamped. |
