Patent ID: 8056859
Filing Date: 2011-11-15
Classification: B21J,B23B,B64C

Abstract:
1. An airplane wing structure comprising: first and second spars extending in a span direction; a stringer disposed between the first and second spars and extending in the span direction; a rib extending in a chord direction and providing a connection between the first and second spars; and a skin covering the first and second spars, the stringer, and an upper face and a lower face of the rib; a mounting flange being formed on at least one of an upper edge and a lower edge of the rib and being secured to the skin via a rivet, a stringer through hole being formed by cutting out the mounting flange, the stringer being positioned through the stringer through hole, and first and second cutouts being formed in the front end and the rear end of at least one of the upper edge and the lower edge of the rib and facing parts where the first and second spars and the skin are connected, wherein the rib comprises a reinforcing bead formed along the mounting flange, and a reinforcing flange that extends in the span direction from edges of the stringer through hole and the first and second cutouts and is integrally connected to the mounting flange.