Attachment element for structural parts on structural bodies or the like which are provided with holes

摘要

An attachment element 37 for structural parts 38 consisting of wood, metal and plastic, or even of composite material, on structural bodies 39 or the like which are provided with holes 41 consists of a plastic-sleeve expanding dowel 1 and a screw 20. At the free end of its sleeve part 2, the sleeve expanding dowel 1 has a supporting collar 3, which, for example, is also used for holding the screw head 21, and, at a distance under said supporting collar 3 on its outer circumference, has a constriction 5 which determines a reduction in the wall thickness, while said supporting collar 3 carries an annular bead 9 on the internal circumference. Connected to its tip 22, the screw 20 is provided over a portion of the length of its shank 23 with a sawtooth-threaded section 25 and, above said section, has a circumferential groove 29 which is latched to the annular bead 9 in a predetermined axial position of the screw 20, in which axial position the screw 20 partially projects out of the sleeve expanding dowel 1. This attachment element has a construction which ensures correct anchorage of the attachment element even under relatively severe conditions. To this end, the circumferential constriction 5 on the sleeve part 2 of the sleeve expanding dowel 1 is stiffened at at least two diametrically opposite circumferential points by longitudinally running ribs or webs 7, and the annular bead 9 is arranged in the sleeve part 2 underneath the circumferential constriction 5. Above the sawtooth-threaded section 25 on the shank 23 of the screw 20, in the direction of the screw head 21 [lacuna] a screw-nail thread 27 ... Original abstract incomplete. <IMAGE>