A problem to be addressed by the present invention is to provide a hollow structure, particularly propeller blade, having excellent productivity, high strength, light weight, and high quality. The gist of the present invention is to provide a hollow structure made of a resin, including: a skin portion forming the outer surface of the hollow structure; a retaining section integrated with the skin portion, and supporting the skin portion from the inside thereof; and a space in the structure; wherein at least one of the retaining sections is configured to define, from a point of joining, the shortest line segment connecting a face of joining including the point of joining to the opposed face of joining, and is configured such that, in a cross section (referred to as a "cross section 1" for convenience) taken by cutting the structure along a plane passing through the midpoint of the line segment, and including a cross section perpendicular to the line segment, a straight line crosses the skin portion and the retaining section at three or more points, the straight line (referred to as a "straight line 1" for convenience) connecting the midpoints of the short sides of a rectangle defined so as to circumscribe the cross section, and have the minimum area.
HOLLOW STRUCTURE AND PROPELLER BLADE
HOHLSTRUKTUR UND PROPELLERBLATT
STRUCTURE CREUSE ET PALE D'HÉLICE
2024-09-04
Patent
Electronic Resource
English