| 摘要 |
Fastening device for use with porous materials, especially lightweight concrete, comprising a tubular part (1) and an expansion part (2) disposed in said tubular part. The tubular part is partially slit up from a forward insertion end (6), such that at least two limbs (3 and 4) are formed. The expansion part (2), which includes two elongated portions (11, 16) separated by a weakened zone, is at one of its end portions articulated with one of the limbs (4). The fastening device is expanded by a first elongated portion of the expansion part (2) being caused to fill a position transverse the tubular part, the limbs (3 and 4) being forced apart. In doing this the expansion part (2) is bent and its second elongated portion caused to fill a position in which the fasteninng device is locked in an expanded state. |
