| 摘要 |
The invention relates to an expansion dowel (1) comprising expansion elements (6) which are arranged one behind the other on the dowel shaft (2) and form an expansion area (5). The expansion elements (6) each comprise an opening (8) which is offset from the respectively adjacent expansion element. Said openings (8) form a narrow expansion channel (9) which can receive a fastening screw, preferably a drive screw (13). The aim of the invention is to produce a single-piece expansion dowel, which is ready for use, by means of plastic injection moulding. Said aim is achieved whereby the expansion elements (6) are U-shaped and the open sides (7) of the openings (8) of the expansion elements (6) are alternately opposed. The above embodiment enables the expansion elements (6) to be displaced radially to alternate sides when a drive screw (13) is inserted, creating a uniform expansion pressure over the entire expansion area (5) with high expansion dowel retaining values and low resistance to insertion.
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