Structure body and hollow shape extruded frame member

A structural body, comprising:

• a first member having two substantially parallel first face plates and plural first ribs for connecting said two first face plates;
• and
• a second member having two substantially parallel second face plates and plural second ribs for connecting said two second face plates;
• wherein
• said first member and said second member are joined by two joining beads;
• one of said two joining beads joins one of said two first plates of said first member and one of said two second face plates of said second member;
• the other of said two joining beads joins the other of said two first face plates of said first member and the other of said two second face plates of said second member;
• a first corner between a first rib of said first member in the vicinity of said one of said two joining beads and a rear face of said one of said two first face plates of said first member at a position of a first hollow portion of said first member is in the form of a first convex circular arc which protrudes into said first hollow portion of said first member;
• and
• a second corner between said first rib of said first member in the vicinity of said other of said two joining beads and a rear face of said one of said two first face plates of said first member at a position of said first hollow portion of said first member is in the form of a second convex circular arc which protrudes into said first hollow portion of said first member.

A structural body comprising:

• a first member having two substantially parallel first face plates and plural first ribs for connecting said two first face plates;
• and
• a second member having two substantially parallel second face plates and plural second ribs for connecting said two second face plates;
• wherein
• said first member and said second member are joined by two joining beads;
• one of said two joining beads joins one of said two face plates of said first member and one of said two second face plates of said second member;
• the other of said two joining beads joins the other of said two first face plates of said first member and the other of said two second face plates of said second member;
• said two joining beads are positioned, respectively, on a line which passes between a first rib of said first member and a second rib of said second member;
• one of said two second face plates of said second member is overlapped on a protrusion chip which protrudes from said first rib of said first member in the vicinity of said one of said two joining beads toward said second member;
• a first corner between said first rib in the vicinity of said one of said two joining beads and a rear face of one of said two first face plates at a position of a first hollow portion of said two first members is in the form of a first convex circular arc which protrudes into said first hollow portion of said first member;
• and
• a second corner between said second rib in the vicinity of said one of said two joining beads and a rear face of one of said two second face plates at a position of a second hollow portion of said second member is in the form of a second convex circular arc which protrudes into said second hollow portion of said second member.

A structural body, comprising:

• a first member having two substantially parallel first face plates and plural first ribs for connecting said two first face plates;
• and
• a second member having two substantially parallel second face plates and plural second ribs for connecting said two second face plates;
• wherein
• said first member and said second member are joined according to two joining beads;
• one of said two joining beads joins one of said two first face plates of said first member and one of said two second face plates of said second member;
• the other of said two joining beads joins the other of said two first face plates of said first member and the other of said two second face plates of said second member;
• a first corner between said first rib of said first member in the vicinity of said one of said two joining beads and a rear face of one of said two first face plates of said first member at a position of a first hollow portion of said first member is in the form of a first convex circular arc which protrudes into said first hollow portion of said first member;
• a second corner between said second rib of said second member in the vicinity of said one of said two joining beads and a rear face of one of said two second face plates of said second member at a position of a second hollow portion of said second member is in the form of a second convex circular arc which protrudes into said second hollow portion of said second member;
• a third corner between said first rib of said first member in the vicinity of said other of said two first face plates of said first member at a position of said first hollow portion of said first member is in the form of a third circular arc which protrudes into said first hollow portion of said first member;
• and
• a fourth corner between said second rib of said second member in the vicinity of said other of said two joining beads and a rear face of the other of said two second face plates of said second member at a position of said second hollow portion of said second member is in the form of a fourth convex circular arc which protrudes into said second hollow portion of said second member.