to thermal expansion. Thus, clips are assembled to mounting seats with such a slight play as to allow them to be shifted for positional adjustment, so that respective leg portions of the clips can be inserted into corresponding mounting holes in the support member.
However, when the positions of the clips vary within a range defined by the play, the registration of the leg portions with the corresponding mounting hole becomes difficult in inserting the leg portions in the mounting holes, and the assembling efficiency is deteriorated.
Thus, the applicant (in US, assignee) of this patent application has proposed a construction provided with a centering action which moves leg portions of clips to centers of corresponding mounting seats while permitting the individual clips to have a slight play. Patent Literatureportions at the bends of the engagement grooves. When the elastic arms are deflected by an external force to thereby force the clips out of the central positions thereof, the projections perform a cam-like movement within the corresponding engagement grooves by an elastic restoring force of the elastic arms to thereby center the clips back in their original positions.