| 摘要 |
<p>A metal wall anchor (10) for a screw (100), the wall anchor comprising a longitudinal axis (A), a cylindrical head collar (14) located at one end, a cylindrical tail collar (16) located at an opposite end, and a plurality of plastically deformable substantially longitudinal bars (18) which connect the head collar to the tail collar. The head and tail collars each have an internal free passage (20,22) for a threaded shaft of a screw. The bars are uniformly distributed about an internal free passage (24) as well. The head collar has a transverse head flange (26) for abutment with a transverse screw head (100). The tail collar has a nut (28) for engagement with a threaded screw shaft (102). The nut is a stack of at least three rings (28',28",28"') arranged substantially transverse the axis upon an annular end face (58) of the tail collar, wherein an internal hole (56',56",56"') through each respective ring is substantially coaxial with the axis, and wherein a side of each ring is connected to the tail collar by a respective web (54',54",54"'). An assembly of the aforementioned wall anchor and a screw. A method of manufacturing the aforementioned wall anchor from a sheet metal strip (12).</p> |
