BUMPER

PURPOSE:To make a plastic bumper so as not to expand or contract by a temperature variation, by installing plural projections in a keep plate, which is applied to the surface of a plastic facia locked to a bumper stay and situated in position between the facia and a clamping bolt. CONSTITUTION:When a bolt 5A is clamped tight, a projection 8 is bitten in a resin layer of a facia 1 in consequence. When the facia tries to extend in longitudinal direction by a temperature variation, movements in both directions of the facia 1 of its own are prevented due to a relationship between a screw part of the bolt 5A and a setting hole 6A and bitingness in the projection 8. And, the facia 1 is expanded or contracted quite as much as that of an armature 3 and a keep plate 4. That is to say, expansion or contraction of the facia 1 by the temperature variation is absorbed as heat distortion among, the armature 3, the keep plate 4 and the facia 1. With this constitution, an expansion value of the facia 1 is little as a whole whereby its end part will not interfere with a front fender panel and in no case being projected from that.