Granted Patent B2

US 12,553,231 · App. 18/033,956 · Granted Feb 17, 2026

Inventor: Katsuyuki Kitagawa (Kaga, JP)

Assignee: YUGENKAISHA JAPAN TSUSYO

E04B1/34321B63B35/44E04B1/34384B63B35/28E04B2103/04

Abstract

Claims (65)

1 . An expandable structure comprising:

at least one ceiling member;

at least four wall members; and

at least one floor member,

wherein the at least one floor member has a first portion constituting a floor of the structure and a second upstanding portion constituting a base of a wall,

wherein the first portion and the second portion are integrally formed and define a unitary, one-piece construction,

wherein each of the at least four wall members has:

a first joint edge that is joined to the at least one ceiling member;

a second joint edge that is joined to the at least one floor member;

a third joint edge that is joined to one of the at least four wall members adjacent to each of the at least four wall members; and

a fourth joint edge that is joined to the other one of the at least four wall members adjacent to each of the at least four wall members; and

wherein each of the at least one ceiling member, the at least four wall members, and the at least one floor member is composed of foam;

the at least one ceiling member being a plurality of ceiling members, and further comprising at least one ceiling member for expansion;

the at least four wall members being a plurality of wall members;

the at least one floor member being a plurality of floor members, and further comprising at least one floor member for expansion;

wherein the at least one ceiling member for expansion is joined between two of the plurality of ceiling members to form an expanded ceiling section,

wherein the at least one floor member for expansion is joined between two of the plurality of floor members to form an expanded floor section,

wherein the expanded ceiling section is joined to the expanded floor section with the plurality of wall members, and

wherein each said member is composed of foam.

2 . The structure of claim 1 , wherein

each of the plurality of floor members has four joint edges, and three of the four joint edges of each of the plurality of floor members have a shape that is joined to the plurality of wall members, and

each of the at least one floor member for expansion has four joint edges, and two of the four joint edges of each of the at least one floor member for expansion have a shape that is joined to the plurality of wall members.

3 . The structure of claim 1 , wherein

each of the plurality of ceiling members has four joint edges, and three of the four joint edges of each of the plurality of ceiling members have a shape that is joined to the plurality of wall members, and

each of the at least one ceiling member for expansion has four joint edges, and two of the four joint edges of each of the at least one ceiling member for expansion have a shape that is joined to the plurality of wall members.

4 . A structure comprising:

at least one ceiling member;

at least four wall members; and

at least one floor member,

wherein the at least one floor member has a first portion constituting a floor of the structure and a second upstanding portion constituting a base of a wall,

wherein the first portion and the second portion are integrally formed and define a unitary, one-piece construction,

wherein each of the at least four wall members has:

a first joint edge that is joined to the at least one ceiling member;

a second joint edge that is joined to the at least one floor member;

a third joint edge that is joined to one of the at least four wall members adjacent to each of the at least four wall members; and

a fourth joint edge that is joined to the other one of the at least four wall members adjacent to each of the at least four wall members; and

wherein each of the at least one ceiling member, the at least four wall members, and the at least one floor member is composed of foam;

wherein:

(a) the at least one ceiling member comprises a first ceiling member and a second ceiling member, and each of the first ceiling member and the second ceiling member comprises a first joint edge, a second joint edge, a third joint edge, and a fourth joint edge,

(b) the at least four wall members comprise a first wall member, a second wall member, a third wall member, and a fourth wall member,

(c) the at least one floor member comprises a first floor member and a second floor member, and each of the first floor member and the second floor member comprises a first joint edge, a second joint edge, a third joint edge, and a fourth joint edge,

(d) the first joint edge of the first wall member is joined to the first joint edge of the first ceiling member, the second joint edge of the first wall member is joined to the first joint edge of the first floor member, the third joint edge of the first wall member is joined to the fourth joint edge of the third wall member, and the fourth joint edge of the first wall member is joined to the third joint edge of the fourth wall member,

(e) the first joint edge of the second wall member is joined to the second joint edge of the second ceiling member, the second joint edge of the second wall member is joined to the second joint edge of the second floor member, the third joint edge of the second wall member is joined to the fourth joint edge of the fourth wall member, and the fourth joint edge of the second wall member is joined to the third joint edge of the third wall member,

(f) the first joint edge of the third wall member is joined to the third joint edge of the first ceiling member and the third joint edge of the second ceiling member, and the second joint edge of the third wall member is joined to the third joint edge of the first floor member and the third joint edge of the second floor member,

(g) the first joint edge of the fourth wall member is joined to the fourth joint edge of the first ceiling member and the fourth joint edge of the second ceiling member, and the second joint edge of the fourth wall member is joined to the fourth joint edge of the first floor member and the fourth joint edge of the second floor member,

(h) the second joint edge of the first ceiling member is joined to the first joint edge of the second ceiling member, and

(i) the second joint edge of the first floor member is joined to the first joint edge of the second floor member.

5 . The structure of claim 4 , wherein the foam comprises polystyrene foam.

6 . The structure of claim 4 , wherein

the ceiling member is composed of a first foam having a first expansion ratio,

the wall members are composed of a second foam having a second expansion ratio,

the floor member is composed of a third foam having a third expansion ratio, and

the third expansion ratio is less than the first expansion ratio and the second expansion ratio.

7 . The structure of claim 4 , wherein the structure further comprises an external floor member constituting an external deck on an outside of the at least one floor member of the structure, and the external floor member is joined to the at least one floor member.

8 . The structure of claim 4 , wherein the wall has a first opening, and the first opening is surrounded by the ceiling member, the wall members, and the floor member.

9 . The structure of claim 4 , wherein the wall has a second opening, and the second opening is surrounded by the ceiling member and the wall members.

10 . The structure of claim 4 , wherein a ratio of a base area (m 2 ) of the structure to a weight of the structure (kg) is 1:30 to 1:80.

11 . The structure of claim 4 , further comprising a coating, wherein the coating is configured to at least cover each joint edge of the ceiling member, the wall members, and the floor member constituting the structure.

12 . The structure of claim 11 , wherein the coating is formed to cover an entire outer surface of the structure.

13 . The structure of claim 4 , wherein each of the ceiling member, the wall members, and the floor member constituting the structure comprises a coating that covers an entirety thereof.

14 . The structure of claim 13 , wherein a material of the coating at least has a waterproof property.

15 . A method of fabricating a structure, comprising:

providing the structure of claim 4 ;

joining the at least four wall members to the at least one ceiling member and the at least one floor member, wherein each of the at least four wall members has at least four joint edges, and the at least four joint edges comprise a first joint edge that is joined to the at least one ceiling member, a second joint edge that is joined to the at least one floor member, a third joint edge that is joined to one of the at least four wall members adjacent to each of the at least four wall members, and a fourth joint edge that is joined to the other one of the at least four wall members adjacent to each of the at least four wall members; and

applying a coating to at least cover each said joint edge of the ceiling member, the wall members, and the floor member that are joined.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (17)