SLEEVE-SHAPED EXPANSION DOWEL

摘要

A dowel is formed of an axially elongated sleeve with tongues connected to it so that they can be pivoted outwardly so as to project from the outside surface of the sleeve. Each of the tongues has a radially inwardly directed projection in the retracted position with the projection having a dimension transverse to the axial direction of the sleeve greater than the sleeve thickness. To provide an anchoring effect, the tongues can be displaced outwardly from the sleeve by a displacement member movable through the bore formed by the sleeve. In the extended positions. the tongues interlock. Webs connected to the tongues provide articulated connections between the tongues and the sleeve. The pivot axes formed by the webs extend normal to the axis of the sleeve.