AN EXPANSION ANCHOR

摘要

An expansion anchor for mounting in a receiving socket in base material to enable an object to be clamped thereto. The anchor comprises a longitudinally split tubular sleeve (1) to which an internally threaded expansion body (6) is retained by means of lugs (10) thereof engaging slots (2, 3, 11) in the body of the sleeve (1). The slots (2, 3, 11) are provided to permit the tubular sleeve (1) to expand into gripping contact with the receiving socket as the expansion body (6) is drawn axially within the sleeve (1) by a threaded anchor rod (15). The sleeve (1) is provided with support means (8, 12, 13, 14) for the anchor rod (15) when in engagement with the expansion body (6). The support means (12, 13, 14) constitute telescopic spacer elements between the head of the anchor rod (15) and the tubular sleeve (1) which allow free relative movement between the expansion body (6) and the head of the anchor rod (15) until the anchor is set in the receiving socket. The arrangement is such that in the set condition the spacer elements (12, 13, 14) and expansion body (3) assume positions around the rod (15) which together with the sleeve (1) provide for solidity of structure of the expansion anchor within the receiving socket. The expansion anchor is thus suitable for applications where high shear loads and vibrational forces are to be encountered.