| 摘要 |
The invention provides an anchorage for securing a flat bottom rail to a solid foundation having at least two circular cylindrical holes preformed therein. The anchorage according to the invention comprises essentially two components, the first component being a metal baseplate having non-circular through holes therein located to register with the preformed holes in the foundation. The second component according to the invention comprises foundation bolt means passing through the holes in the baseplate and in the foundation. The foundation bolt means which comprise a bolt adapted to be passed through the baseplate to engage a nut member located in a hole in the foundation, the nut member being an elongate metal member surrounded at least in part by a sleeve of elastomeric material which can be deformed on axial movement of the nut into engagement with the walls of the foundation hole, said nut member having one end so shaped that it can enter and key with one of the non-circular through holes of the baseplate so that the nut is prevented from rotation relative to the baseplate. The baseplate may be formed with lugs which assist in anchoring the rail and wedge shaped clamping block means may be provided cooperating with the foundation bolt means and the baseplate abutments to secure the rail on the baseplate.
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