Shell element, shell structure and structure forming set
AssigneeJinzaikaihatsu-sienkikou Co., Ltd.
InventorKeisuke Kitagawa
Life of this patent
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Abstract
[Summary] A shell element that can be formed simply and in a short time, a shell structure using the shell element, and a structure forming set that can form the shell element simply and in a short time are provided. Resin material is foamed on the inside of thin film, a foamed material portion with bubbles being mixed is in the state of being sandwiched by the thin film and a solid layer, and tensional stress is applied to the thin film and the solid layer and compressive stress is applied to the foamed material portion, thus the shell element is difficult to be cracked or split, and the shell structure is formed by the shell element. And, the shell structure forming set forms the shell structure easily.
Claims17
A shell element constituting a shell structure enclosing space, wherein:
- the shell element is composed of thin film that constitutes one side of surfaces of the shell element and a layered foamed material portion;
- one surface of the layered foamed material portion adheres to the thin film, thus the thin film and the layered foamed material portion are integrated;
- another surface of the layered foamed material portion that does not adhere to the thin film forms a solid layer with low bubble density in which bubbles escaped from the another surface;
- an entire surface of the solid layer facing toward the space is exposed to the space;
- and
- tensile force is applied to both of the thin film and the solid layer and compressional force is applied to the layered foamed material portion except for the solid layer.
A structure forming set that is characterized as follows:
- the structure forming set is composed of single-layered thin film, a holding means of the thin film, a spraying means of foamed material, and resin material;
- the thin film is integrated to form a shape enclosing space and has an opening portion to enable to open an outside and an inside of the space;
- the holding means of thin film closes the space by holding a peripheral edge of the thin film and enables the thin film to curve convexly toward the outside;
- and
- the spraying means of foamed material can spray the resin material mixed with bubbles on an inner surface of the thin film that is curved convexly toward the outside, and constructs structures, in which one surface of a foamed material portion adheres only to the inner surface of the thin film and another surface of the foamed material portion that does not adhere to the thin film forms a solid layer with low bubble density in which bubbles escaped from the another surface, an entire surface of the solid layer facing toward the space being exposed to the space.
Dependencies are inferred from the claim text.