Fastening coupling for corrugated pipes (tubes)

摘要

A fastening coupling for corrugated pipes comprises a tubular sleeve (1) and a securing tongue (15) which is arranged in a cutout (13) in the circumferential wall of the sleeve and is connected integrally to the sleeve via two lateral torsionally elastic webs (17). The securing tongue (15) is designed as a two-armed lever. One lever arm (15a) bears a locking protrusion (19) for engagement into a circumferential groove of the corrugated pipe (21), and the other arm (15b) serves as a pressure plate for pivoting the securing tongue into the release position. Each of the torsionally elastic webs (17) is of such a length that it is flexurally elastic in the axial direction of the sleeve, with the result that the securing tongue (15) can be displaced in the axial direction in the cutout (13) and comes into contact with bevelled guide surfaces (27, 39) of the sleeve. The guide surfaces (27, 39) are configured such that, in the event of tension on the coupled corrugated pipe (21), the locking protrusion (19) is pushed more firmly inwards into the groove of the corrugated pipe and/or that, when the corrugated pipe is pushed in, the locking protrusion (19) is pivoted outwards into the release position. <IMAGE>