| 摘要 |
A tubular member (1) such as the sleeve portion of an expansion bolt is formed by two components (4, 5) with each of the components (4, 5) comprising a first portion (4a, 5a) and a second portion (4b, 5b) said portions each being in the form of a semi-annular shell, the portions being offset with respect to one another about the longitudinal axis of the sleeve and the first portion (4a, 5a) of each component (4, 5) being integral with the further portion of that component by means of a narrow connecting web (5c). Each component can be cast or moulded in a simple two part die or mould and the two components (4, 5) can be assembled together in interengaging relation to form a sleeve (1) by relative movement in a plane in which the longitudinal axis of the sleeve lies and then secured by a member (2 or 3) engaged in the sleeve (1) or by cooperating profiles of the components (4, 5). |
