| 摘要 |
A plastic corrugated tube, in the outer wall of which has a circular ring corrugation, is provided on one end with an integrally molded-on plain coupler having an approximately cylindrical inner face. Its inside diameter (d) is substantially equal to the outside diameter (d) of the corrugated tube, and the circular rings that form the corrugation and are spaced apart from one another by the distance (T) in the longitudinal direction of the tube each have the approximate cross section of a trapezoid tapering toward the outside; to this end, they have an approximately annular-cylindrical outer wall section (a) and slightly inclined side wall sections adjoining the outer wall section. To enable simple laying of the tubes by inserting the tube end into a sleeve coupler even when there are relatively large tolerances in diameter and in particular in the outer diameter of the tubes, yet simultaneously to attain a tight coupler union, at least a portion of the outer wall sections of the circular rings is provided with an annular elevation that can be elastically deformed radially inwardly in common with the respective outer wall section. The outside diameter (D) of the elevation, in the undeformed state, is slightly greater than the inside diameter (d) of the sleeve coupler.
|
