Bumper fastening structure

A bumper fastening structure comprising:

• a bumper;
• a fender;
• a retainer serving as a retaining member;
• and
• a screw,
• the retainer comprising:
• a body having a U shape, the body including a pair of clamp walls configured to clamp a bumper flange that is a terminal end of the bumper and a connecting wall configured to connect the pair of clamp walls;
• and
• a fixing catch protruding from an outer face of a first one of the clamp walls, the fixing catch being configured to be fitted in a fitting hole in a fender flange that is a terminal end of the fender,
• wherein the fixing catch includes a screw hole formed in a protruding direction of the fixing catch,
• wherein the pair of clamp walls include a temporary securing projection on at least one of inner faces,
• wherein a second one of the clamp walls includes a first through hole along an extension line of the screw hole,
• wherein at least one of the pair of clamp walls includes a slope face on the inner face, such that a distance between the inner surfaces of the pair of clamp walls increases toward the screw hole and a wedge-shape space is formed,
• the bumper flange comprising:
• a second through hole aligned with the screw hole and the first through hole;
• an engaging portion configured to engage with the temporary securing projection;
• and
• a wedge-shape portion corresponding to the wedge-shape space, the wedge-shape portion having a thickness along a central axis direction of the second through hole, the thickness increasing toward the second through hole,
• the screw being configured to be screwed into the screw hole via the first through hole and the second through hole, to increase a diameter of the fixing catch and tighten the pair of clamp walls and the bumper flange clamped between the pair of clamp walls.