Panel

Abstract

To provide a panel whose surface rigidity can be improved appropriately in accordance with a load. Provided is a panel including: a load point to which a load is applied from the outside; and a protrusion that protrudes from a surface of the panel and is formed continuously or discontinuously around the load point. The protrusion intersects, at a plurality of positions, each of a plurality of virtual straight lines extending radially from the load point.

1 . A floor panel of an automobile comprising:
 a load point to which a load is applied from the outside; and   a plurality of protrusions that protrude from a surface of the floor panel and are formed continuously around the load point,   wherein each of the plurality of protrusions intersects, at a plurality of positions, each of a plurality of virtual straight lines extending radially from the load point.   
     
     
         2 . The floor panel according to  claim 1 ,
 wherein the load point is a junction with another member.   
     
     
         3 . The floor panel according to  claim 1 , comprising a plurality of the load points,
 wherein at least one of density, a formation range, and a cross-sectional shape of at least two of the plurality of protrusions differ in accordance with an assumed load applied to the load point.   
     
     
         4 . The floor panel according to  claim 3 ,
 wherein, at a boundary portion where protrusions formed around the corresponding plurality of load points intersect each other, side faces of the protrusions are continuous via a curved surface.   
     
     
         5 . The floor panel according to  claim 1 ,
 wherein a ridge line of the one of the plurality of protrusions perpendicularly intersects the plurality of virtual straight lines.   
     
     
         6 . The floor panel according to  claim 1 ,
 wherein the plurality of virtual straight lines are straight lines connecting the load point and a plurality of vertices of the floor panel.   
     
     
         7 . The floor panel according to  claim 1 , wherein each of the plurality of protrusions includes a top face parallel to the surface of the floor panel. 
     
     
         8 . The floor panel according to  claim 1 ,
 wherein the plurality of protrusions are ring-shaped and are formed concentrically, and   wherein the center of the plurality of protrusions coincides with the load point.   
     
     
         9 . The floor panel according to  claim 1 ,
 wherein the plurality of protrusions includes a spiral-shaped protrusion whose base point is the load point.   
     
     
         10 . The floor panel according to  claim 1 ,
 wherein the floor panel is made of a steel sheet.   
     
     
         11 . The floor panel according to  claim 8 , wherein a top face of each of the plurality of protrusions has a square shape in a planar view. 
     
     
         12 . The floor panel according to  claim 8 , further comprising a plurality of triangular-shaped protrusions that are triangular-shaped in a planar view and positioned farther from the load point than each of the plurality of protrusions that are ring-shaped. 
     
     
         13 . The floor panel according to  claim 12 , wherein a top face of each of the triangular shaped protrusions have a trapezoidal shape in the planar view. 
     
     
         14 . The floor panel according to  claim 1 , wherein the ridgeline of each of the plurality of protrusions intersects all of the virtual straight lines extending radially from the load point at angles within a range of 45° to 90°. 
     
     
         15 . The floor panel according to  claim 1 , wherein a height of one of the plurality of protrusions is different from a height of another of the plurality of protrusions. 
     
     
         16 . The floor panel according to  claim 5 , wherein the top face of one of the plurality of protrusions has a width that is different from another of the plurality of protrusions. 
     
     
         17 . The floor panel according to  claim 1 , wherein an inclination angle θ of one of the plurality of protrusions is different from another inclination angle θ of another of the plurality of protrusions.