Polygonal cross-sectional frame, and rear vehicle body structure

Abstract

A polygonal cross-sectional frame has an L closed cross-sectional shape such that the frame has an inwardly recessed section. A rear vehicle body structure includes a depressing member provided, along the lower surface of a rear frame extending rearward from a floor of a passenger compartment, in opposed relation to a predetermined vehicle-body-mounted component part disposed beneath the depressing member. As a rear section of the rear frame deforms due to a load input to the rear end of the rear frame, the depressing member deforms downward to depress and displace the predetermined vehicle-body-mounted component part.

What is claimed is: 
     
         1 . A rear vehicle body structure comprising
 a depressing member disposed, along a lower surface of a rear section of a rear frame extending rearward from a floor of a passenger compartment, in opposed relation to a predetermined vehicle-body-mounted component part disposed beneath the depressing member,   wherein, as the rear section of the rear frame deforms due to a load input to a rear end of the rear frame, the depressing member deforms downward to depress the predetermined vehicle-body-mounted component part.   
     
     
         2 . The rear vehicle body structure according to  claim 1 , wherein the rear section of the rear frame has an L cross-sectional shape, and the depressing member is accommodated in an inwardly recessed section defined in a corner portion of the L cross-sectional shape of the rear section of the rear frame. 
     
     
         3 . The rear vehicle body structure according to  claim 1 , wherein the depressing member is elongated along the rear frame and includes front and rear end portions fixed to the lower surface of the rear section of the rear frame and an intermediate portion formed integrally with and between the front and rear end portions, and wherein the intermediate portion is constructed to deform downward toward the predetermined vehicle-body-mounted component part in response to reduction in a distance between the front and rear end portions. 
     
     
         4 . The rear vehicle body structure according to  claim 1 , wherein the depressing member has a frail portion provided in an upper surface of the intermediate portion to facilitate downward deformation of the depressing member. 
     
     
         5 . The rear vehicle body structure according to  claim 1 , wherein the depressing member has a slanting surface portion facing outwardly or inwardly of the rear section of the rear frame for depressing the predetermined vehicle-body-mounted component part.