JP7737262B2 - Dome-shaped structures, structural units, panels and panel sets - Google Patents

Description

The present invention relates to a dome-shaped structure constructed by combining multiple dome sections, a structural unit including a dome-shaped structure, and panels and panel sets used in dome-shaped structures.

Dome-shaped structures that can be assembled by combining multiple fragmented parts are used for a variety of purposes, including temporary housing and simple tents. When using these dome-shaped structures, the components are transported and the dome-shaped structure is assembled at the location where it will be used.

One example of the above-mentioned dome-shaped structure is the dome-shaped structure described in Patent Document 1. The dome-shaped structure described in Patent Document 1 is constructed by assembling panel members with triangular or rectangular outer surfaces. Specifically, the dome-shaped structure is constructed by arranging multiple panel members to form a polyhedral dome, and fastening the panel members together with binding members.

JP 2017-110439 A

When assembling a dome-shaped structure, the position and order of each part must be understood in relation to the shape of each part. Therefore, the more types of parts there are, the more information that must be understood, and the more complicated the assembly work becomes. In contrast, dome-shaped structures are required to be easier to assemble.

The present invention was made in light of the above circumstances, and aims to solve the problems of the prior art and, specifically, to provide a dome-shaped structure that improves the workability of assembly work. It also aims to provide a structural unit that includes the above-mentioned dome-shaped structure, as well as panels and panel sets used in assembling the above-mentioned dome-shaped structure.

In order to achieve the above-mentioned object, the dome-shaped structure of the present invention is a dome-shaped structure constructed by combining a plurality of dome pieces, wherein two of the plurality of dome pieces that are adjacent to each other have symmetrical shapes with respect to the boundary position between the two dome pieces, and each of the plurality of dome pieces is constructed by joining a first panel and a second panel that is the same number as the first panels and has a symmetrical shape with respect to the boundary position with the first panels.
The dome-shaped structure configured as described above can be assembled more easily. That is, the dome pieces can be constructed by joining the first and second panels, which are symmetrical to each other, making it easy to create the dome pieces. Then, the dome pieces are repeatedly created to prepare the number of dome pieces required to construct the dome-shaped structure, and the multiple dome pieces are arranged in a polyhedral shape and combined. In this case, because adjacent dome pieces are symmetrical to each other, the work of combining the dome pieces can be repeated using the same procedure. This makes it easy to assemble the dome-shaped structure, improving the workability of the assembly work.

In the dome-shaped structure of the present invention, it is preferable that the number of dome pieces is an even number.
In the dome-shaped structure of the present invention, each of the first and second panels may have a polygonal panel body and an extension piece extending along the outer edge of the panel body and adjacent to the panel body. In this case, the extension piece may be bendable along a folding line formed at the boundary between the panel body and the extension piece, and the first and second panels may be joined in a state where the respective extension pieces are folded and overlapped.
In the dome-shaped structure of the present invention, it is preferable that each of the first panel and the second panel has a front surface and a back surface, and that a folding line is formed on the back surface.

In the dome-shaped structure of the present invention, the extending piece of the first panel may be provided with a first indentation, and the extending piece of the second panel may be provided with a second indentation. In this case, it is more preferable that the first indentation be folded together with the second indentation when pressed toward the second indentation while overlapping the second indentation, and that the folding of the second indentation enters inside an insertion hole formed in the extending piece of the second panel.
In the above configuration, the extension piece of the first panel may have a fold line at the base end of the first indentation portion, and a notch at the outer edge of the first indentation portion other than the base end. The extension piece of the second panel may have a fold line at the base end of the second indentation portion, and a notch at the outer edge of the second indentation portion other than the base end. Furthermore, both sides of the first indentation portion may have protrusions that protrude outward in the width direction of the first indentation portion. In this case, it is preferable that the protrusions of the first indentation portion that have entered the inside of the insertion hole engage with the edge of the insertion hole, thereby joining the first and second panels.
In the above configuration, it is more preferable that each of the first pushing portion and the second pushing portion has an alignment hole formed therein.

In the dome-shaped structure of the present invention, a first indentation may be provided on an end of the extension piece of the first panel in the extension direction, and a third indentation may be provided in the center of the extension piece in the extension direction. Also, a second indentation may be provided on an end of the extension piece of the second panel in the extension direction, and a fourth indentation may be provided in the center of the extension piece in the extension direction. In this case, it is more preferable that the third indentation be folded together with the fourth indentation when pressed toward the fourth indentation while overlapping the fourth indentation, and that the fourth indentation bends and enters another insertion hole formed in the extension piece of the second panel as the fourth indentation is bent.
Furthermore, in the above configuration, it is even more preferable if the direction in which the bending line formed at the base end of the first pushing portion extends intersects with the direction in which the bending line formed at the base end of the third pushing portion extends, and the direction in which the bending line formed at the base end of the second pushing portion intersects with the direction in which the bending line formed at the base end of the fourth pushing portion extends.

Furthermore, in the dome-shaped structure of the present invention, it is more preferable that the first and third pushing portions are provided on the extension piece of the first panel of the first and second panels, and that the second and fourth pushing portions are provided on the extension piece of the second panel of the first and second panels.
Furthermore, in the dome-shaped structure of the present invention, when the dome-shaped structure is constructed by combining multiple dome pieces, the extension piece of the bent first panel and the extension piece of the bent second panel may be located inside the dome-shaped structure.
In the dome-shaped structure of the present invention, the first panel and the second panel may be made of cardboard.
Furthermore, the dome-shaped structure of the present invention may have a circular lower dome portion and an upper dome portion placed on the lower dome portion, the lower dome portion being constructed by arranging two or more dome pieces in a circular ring shape, and the upper dome portion being constructed by arranging two or more dome pieces around the highest point of the upper dome portion.

Furthermore, a structural unit of the present invention includes a dome-shaped structure having any of the above-described configurations and a dome body structure arranged below the dome-shaped structure in parallel with the dome-shaped structure, and is characterized in that the outer edge of the upper end of the dome body structure and the outer edge of the lower end of the dome body structure are the same size.
The panel of the present invention is a panel used in a dome-shaped structure having any of the above-described configurations, and is characterized in that it is used as a first panel or a second panel in each of a plurality of dome pieces that make up the dome-shaped structure.
Furthermore, the panel set of the present invention is a panel set used in a dome-shaped structure of any of the above-mentioned configurations, and is characterized in that it includes a first panel and the same number of second panels as the first panels, and the first and second panels included in the panel set form one dome piece out of multiple dome pieces.

The present invention provides a dome-shaped structure with improved assembly workability. It also provides a structural unit that includes the above-mentioned dome-shaped structure, maintaining strength against loads placed on the dome-shaped structure. It also provides panels and panel sets that can be used to assemble the above-mentioned dome-shaped structure.

1 is a perspective view of a dome-shaped structure according to an embodiment of the present invention. FIG. 1 is a top view of a dome-shaped structure according to an embodiment of the present invention. FIG. 2 is a front view of a dome piece according to an embodiment of the present invention. FIG. 2 is a perspective view of a dome piece according to an embodiment of the present invention, showing the dome piece as viewed from the back side. FIG. 1 illustrates a dome-shaped structure divided into two parts according to an embodiment of the present invention. FIG. 1 is a diagram showing a structural unit including a dome-shaped structure according to one embodiment of the present invention. FIG. 2 is a front view of two adjacent dome sections. FIG. 10 is a plan view showing a first small panel, and the drawing also shows enlarged views of a first pressing portion and a third pressing portion. FIG. 2 is a plan view showing the first large panel. FIG. 10 is a plan view showing the second small panel, and the drawing also shows enlarged views of the second and fourth pressing portions. FIG. 10 is a plan view showing the second large panel. 1A to 1C are diagrams illustrating an assembly procedure for a dome-shaped structure according to an embodiment of the present invention. FIG. 10 is a perspective view showing a state in which the first pushing portion is pushed. FIG. 10 is a cross-sectional view showing a state in which the first pushing portion is pushed. FIG. 10 is a perspective view showing a state in which the third pushing portion is pushed. FIG. 10 is a cross-sectional view showing a state in which the third pushing portion is pushed.

One embodiment of the present invention (hereinafter referred to as the present embodiment) will be described in detail below with reference to the accompanying drawings. Note that the embodiment described below is merely an example provided to facilitate understanding of the present invention and is not intended to limit the present invention. In other words, the present invention may be modified or improved from the embodiment described below without departing from the spirit of the present invention. Furthermore, the present invention includes equivalents thereof.

In addition, in this specification, the meanings of "same," "identical," and "equal" may include the range of error generally accepted in the technical field to which this invention pertains.

<<Outline of the Dome-Shaped Structure of the Present Embodiment>>
The dome-shaped structure of this embodiment (hereinafter referred to as dome-shaped structure 10) is constructed by combining multiple dome pieces 12, and is a polyhedral dome body as shown in Figures 1 and 2. As shown in Figure 2, the dome pieces 12 are fragmentary components that form part of the dome-shaped structure 10, and are constructed by combining multiple panels 14, i.e., panel sets.

Each of the multiple dome sections 12 has the same structure, shape, and size. More specifically, the type and number of panels 14 used to create each dome section 12 are consistent across the dome sections 12. In other words, the panel set that makes up one dome section 12 is the same for each dome section 12. Furthermore, the number of dome sections 12 that make up the dome-shaped structure 10 and the number of panels 14 that make up each dome section 12 are both even numbers; in this embodiment, they are 12 and 4, respectively.

The panels 14 are the smallest unit components that make up the dome-shaped structure 10, and each panel 14 has a front surface Sa and a back surface Sb, as shown in Figures 3 and 4. When the dome-shaped structure 10 is assembled, the front surface Sa of each panel 14 forms the outer surface (exposed surface) of the dome-shaped structure 10. The same color or pattern can be applied to the front surface Sa of each panel 14. In other words, the outer surface of the dome-shaped structure 10 assembled using the panels 14 can be applied with a single color or a uniform pattern.

The dome-shaped structure 10, dome segments 12, and panels 14 are primarily constructed from corrugated cardboard, or cardboard sheets. Cardboard sheets have a laminated structure with a corrugated paper core sandwiched between two flat sheets of paper. The paper may be of any quality, and may be coated with various coatings.

The dome-shaped structure 10 is formed by combining an upper dome 16 and a lower dome 18, as shown in Figure 5. The lower dome 18 is a circular portion formed by arranging two or more dome pieces 12 in a circular shape, and in this embodiment, it is formed by eight dome pieces 12. The upper dome 16 is a roughly hemispherical or roughly dish-shaped portion placed on top of the lower dome 18, and is formed by arranging two or more dome pieces 12 in a circle around the apex of the upper dome 16, and in this embodiment, it is formed by four dome pieces 12. The apex of the upper dome 16 is the highest point on the dome-shaped structure 10.

The upper dome section 16 and the lower dome section 18 can each be assembled separately. After assembling the upper dome section 16 and the lower dome section 18, the upper dome section 16 is placed on the lower dome section 18 and fastened together to complete the dome-shaped structure 10.

The dome-shaped structure 10, together with the dome fuselage structure 60, constitutes the structural unit 100 shown in Figure 6. The structural unit 100 can accommodate people, animals, materials, etc., and can be used for purposes according to the size of each part of the unit, such as temporary housing in disaster areas, simple tents, or pet kennels.

The dome-shaped structure 60 forms the base of the structural unit 100 and is placed below and alongside the dome-shaped structure 10. In other words, the dome-shaped structure 10 is placed on top of the dome-shaped structure 60 and fastened to the dome-shaped structure 60 using a fastening member or the like (not shown). The storage space formed inside the structure is expanded (raised) by the amount of the dome-shaped structure 60 provided, compared to the space occupied by the dome-shaped structure 10 alone.

Like the dome-shaped structure 10, the dome fuselage structure 60 is assembled using panels made of cardboard paper, and is more specifically constructed by arranging multiple fragmentary parts (panel assemblies) made by combining multiple panels in a circular pattern. However, this is not limited to this, and a material different from the material of the dome-shaped structure 10 may also be used. For example, the dome fuselage structure 60 may be constructed by molding or processing a metal or resin material into a cylindrical shape.

In addition, in this embodiment, the openings 62 for accessing the inside and outside of the structure unit 100 are not provided in the dome-shaped structure 10 as shown in FIG. 1, but are provided only in the dome body structure 60 as shown in FIG. 6. This makes it possible to avoid a decrease in strength of the dome-shaped structure 10 that would otherwise be caused by providing the openings 62. As a result, the strength of each part of the dome-shaped structure 10 is uniform, and the strength of the dome-shaped structure 10 against deposits (deposition strength) can be maintained.

The outer shape of the dome fuselage structure 60 is symmetrical across the center of the dome fuselage structure 60 in the height direction. In other words, the outer edge of the upper end of the dome fuselage structure 60 and the outer edge of the lower end of the dome fuselage structure 60 have the same shape and size. The center of the dome fuselage structure 60 in the height direction is recessed inward and narrowed. This shape makes the dome fuselage structure 60 less likely to be crushed by the load (deposition load) of deposits accumulated on the dome-shaped structure 10, and specifically, it is possible to prevent the upper and lower ends of the dome fuselage structure 60 from spreading outward.
The dome fuselage structure 60 is not limited to the above-described shape, and may be a straight pipe shape in which the cross-sectional shape does not change at each part in the height direction of the dome fuselage structure 60, or may be a flared shape in which the cross-sectional size increases toward the lower end.

<<About the dome pieces>>
The outer shape of each of the multiple dome pieces 12 that make up the dome-shaped structure 10 is approximately quadrangular in front view as shown in Figure 3, and more precisely, it is a quadrangle with diagonals of different lengths. However, the outer shape of the dome pieces 12 is not limited to a quadrangle and may be a triangle, pentagon, hexagon, octagon, or other polygon.

The multiple panels 14 that make up each dome piece 12 are assembled so that the apex angles of each panel 14 converge at a single point (the position marked with the symbol P in Figure 3). The multiple panels 14 are arranged so that the surface Sa of each panel 14 is inclined, and the area of the surface of the dome piece 12 where the apex angles of the multiple panels 14 converge protrudes. This gives each dome piece 12 a three-dimensional shape with a curved surface.

Of the four apex angles of the dome piece 12, the size (angle) of the two angles located at both ends of the shorter diagonal line is 90° from a bird's-eye view (perspective) of approximately 45°. The size (angle) of the two angles located at both ends of the longer diagonal line is 90° and 120° from a bird's-eye view (perspective) of approximately 45°.

In this embodiment, as described above, each dome piece 12 has the same shape and size. When assembling the dome-shaped structure 10, multiple dome pieces 12 are combined so that the dome pieces are arranged symmetrically. To explain in more detail, as shown in Figure 7, two adjacent dome pieces 12 have symmetrical shapes with respect to the boundary between the dome pieces 12, and strictly speaking, they are in a line-symmetric relationship (mirror image relationship).

<<About the panel>>
The multiple panels 14 (i.e., panel set) that make up each dome section 12 are common to each dome section 12 and are made up of a first panel and a second panel, which will be described later. In this embodiment, each dome section 12 is made up of two first panels and two second panels joined together. Note that the number of first panels and second panels that make up one dome section 12 may be any number, as long as the number of first panels and the number of second panels are the same.

In this embodiment, the two first panels are panels 14 of different sizes; hereinafter, the smaller first panel will be referred to as the first small panel 21, and the larger first panel will be referred to as the first large panel 25. Similarly, the two second panels are panels 14 of different sizes; hereinafter, the smaller second panel will be referred to as the second small panel 31, and the larger second panel will be referred to as the second large panel 35.

The individual panels will be described below with reference to Figures 8 to 11. In this embodiment, the panel 14 shown in Figures 8 and 9 corresponds to the first panel, and the panel 14 shown in Figures 10 and 11 corresponds to the second panel. However, this is not limited to this, and the panel 14 shown in Figures 10 and 11 may correspond to the first panel, each of which may be provided with a first pressing portion 41 and a third pressing portion 43, as described below. In this case, the panel 14 shown in Figures 8 and 9 corresponds to the second panel, each of which may be provided with a second pressing portion 42 and a fourth pressing portion 44, as described below.

[First small panel]
The first small panel 21 has the appearance shown in Figure 8, and as shown in the figure, has a panel main body 22, three extension pieces 23, a first push-in portion 41, a third push-in portion 43, an alignment hole 48, and a fastening hole 49.

The panel body 22 is a triangular portion that forms the outer wall of the dome-shaped structure 10, and more specifically, a right-angled triangular portion with three interior angles of 30°, 60°, and 90°. The shape of the panel body 22 is not limited to a triangle, and may be a square, pentagon, hexagon, octagon, or other polygon.

Each of the three extension pieces 23 is a strip-shaped portion adjacent to the panel main body 22, extending along a corresponding one of the three sides that make up the outer edge of the panel main body 22. Each extension piece 23 can be bent along a bending line L1 formed at the boundary between the panel main body 22 and the extension piece 23; more specifically, it can be bent perpendicular to the panel main body 22 or at an angle equal to a perpendicular angle. Of the front surface Sa and back surface Sb of the first small panel 21, the bending line L1 is formed only on the back surface Sb.

The first pressing portions 41 are portions that are pressed into place when joining panels together. As shown in FIG. 8, two first pressing portions 41 form a pair, and each extension piece 23 is provided with two pairs of first pressing portions 41. However, the number of first pressing portions 41 provided on each extension piece 23 may be any number.

A pair of first pushing portions 41 are provided on one end side and the other end side of each extension piece 23 in the extension direction of the extension piece 23. Each of the pair of first pushing portions 41 extends from a base end, and is formed so that their respective tip ends are in contact with each other. Explaining in more detail, as shown in FIG. 8, each of the pair of first pushing portions 41 has a base end, a root portion 45 adjacent to the base end, and a continuous portion 46 that is continuous with the root portion 45 on the opposite side from the base end. A notch is provided on the outer edge of the first pushing portion 41, excluding the base end (i.e., the outer edges of the root portion 45 and the continuous portion 46).

The width of the continuous portion 46 is wider than the width of the root portion 45. In other words, protrusions 47 are provided on both sides of the continuous portion 46, protruding outward in the width direction of the first pushing portion 41. Here, the width direction of the first pushing portion 41 is a direction that intersects with the extension direction of the corresponding extension piece 23 (more specifically, a direction perpendicular to or the same as perpendicular). The widths of the root portion 45 and the continuous portion 46 of the first pushing portion 41 are the lengths in the width direction of the first pushing portion 41.

Before the first pushing portions 41 are operated, as shown in FIG. 8, the pair of first pushing portions 41 are in a state in which the tips of their respective continuous portions 46 are butted together. Furthermore, a folding line L2 is provided at the base end of each of the pair of first pushing portions 41. In other words, each first pushing portion 41 can be folded at the base end position. Furthermore, the folding line L2 extends along the width direction of the first pushing portion 41.

The third press-in portion 43 is a portion that is pressed into place when joining panels together, and as shown in FIG. 8, one third press-in portion 43 is provided in the center of each extension piece 23 in the extension direction of that extension piece 23. However, any number of third press-in portions 43 may be provided on each extension piece 23. The third press-in portion 43 extends from the base end, and as shown in FIG. 8, like the first press-in portion 41, has a base end, a root portion 45, and a continuous portion 46. A notch is provided on the outer edge of the third press-in portion 43, excluding the base end (i.e., the outer edges of the root portion 45 and the continuous portion 46).

Furthermore, the width of the continuous portion 46 is wider than the width of the root portion 45. In other words, protrusions 47 that protrude outward in the width direction of the third push-in portion 43 are provided on both sides of the continuous portion 46. Here, the width direction of the third push-in portion 43 is a direction along the extension direction of the corresponding extension piece 23 (more specifically, a direction parallel to or the same as parallel). Note that the widths of the root portion 45 and the continuous portion 46 of the third push-in portion 43 are the lengths in the width direction of the third push-in portion 43.

Furthermore, a bending line L3 is provided at the base end of the third pushing portion 43. In other words, the third pushing portion 43 can be bent at the base end position. Furthermore, the bending line L3 extends along the width direction of the third pushing portion 43. In other words, the extending direction of the bending line L2 and the extending direction of the bending line L3 intersect with each other, and are preferably perpendicular or in the same direction as the perpendicular direction.

The alignment holes 48 are holes formed in the tip portions of the first and third press-in portions 41 and 43, more specifically, in the tip portion of the continuous portion 46. The alignment hole 48 formed in the first press-in portion 41 is used to align the position of the first press-in portion 41 with the position of the second press-in portion 42 that overlaps the first press-in portion 41 when joining panels together. The alignment hole 48 formed in the third press-in portion 43 is used to align the position of the third press-in portion 43 with the position of the fourth press-in portion 44 that overlaps the third press-in portion 43 when joining panels together. The shape of the alignment holes 48 may be any shape, such as a circle, triangle, rectangle, or other polygon, or a star.

The fastening holes 49 are holes through which a binding member such as string or wire is passed to prevent the gap between the tips of the two extension pieces 23 from widening when fastening the extension pieces together to join the first small panel 21 and another panel 14. Two fastening holes 49 are provided at each end of each extension piece 23 in the extension direction. Note that the number of fastening holes 49 may be any number; however, by providing the first push-in portions 41, the number can be reduced compared to when the first push-in portions 41 are not provided.

[First large panel]
9, the first large panel 25 has a panel body 26, five extension pieces 27, a first push-in portion 41, a third push-in portion 43, an alignment hole 48, and a fastening hole 49. The configuration of each part of the panel is substantially the same as the configuration of the first small panel 21.

The panel body 26 of the first large panel 25 has a triangular shape, specifically a right-angled triangle with interior angles of 45°, 45°, and 90°. The surface of the panel body 26 is approximately twice the surface of the panel body 22 of the first small panel 21. As shown in FIG. 9 , a fold line L4 is formed on the back surface Sb of the panel body 26, extending from the vertex where the interior angle is 90° to approximately the midpoint of the hypotenuse. The panel body 26 is gently folded along the fold line L4 to form an obtuse angle. This ensures the rigidity of the panel body 26. In particular, because the surface of the panel body 26 is approximately bisected by the fold line L4, the strength of the portion on one side of the fold line L4 can be made uniform.

Furthermore, as shown in FIG. 9, in addition to the above-mentioned fold line L4, the panel main body 26 may have a fold line L5 extending from approximately the midpoint of the hypotenuse toward the side K1 adjacent to the second large panel 35. When assembling the dome-shaped structure 10, if the panel main body 26 is gently bent at an obtuse angle along the fold line L5, the shape of the outer surface of the dome-shaped structure 10 can be made closer to a sphere.

Each of the five extension pieces 27 is adjacent to the panel main body 26 and extends along a corresponding one of the three sides that make up the outer edge of the panel main body 26. Each extension piece 27 can be bent along a bending line L1 formed at the boundary between the panel main body 26 and the extension piece 27; more specifically, it can be bent perpendicular to the panel main body 26 or at an angle equal to a perpendicular angle. Of the front surface Sa and back surface Sb of the first large panel 25, the bending line L1 is formed only on the back surface Sb.

Of the outer edges of the panel main body 26 shown in FIG. 9, one extension piece 27 extending along side K2 adjacent to the second small panel 31 is fastened to the extension piece 33 of the second small panel 31 when the first large panel 25 and the second small panel 31 are joined. Furthermore, of the outer edges of the panel main body 26, two extension pieces 27 are provided side by side along side K1, which is a side different from the oblique side and adjacent to the second large panel 35. Furthermore, two extension pieces 27 are provided side by side along the oblique side of the panel main body 26.

Each extension piece 27 has a pair of first push-in portions 41 on both ends in the extension direction, and a third push-in portion 43 in the center in the extension direction. The configuration of each of the first push-in portions 41 and third push-in portions 43 is the same as that of the first small panel 21 shown in Figure 8. Note that the number of first push-in portions 41 and the number of third push-in portions 43 provided on each extension piece 27 shown in Figure 9 may each be any number.

Alignment holes 48 are formed at the tip of each of the first and third push-in portions 41 and 43 of each extension piece 27 (more specifically, at the tip of the continuous portion 46). Two fastening holes 49 are provided at each end of each extension piece 27 in the extension direction. While any number of fastening holes 49 may be provided, providing the first push-in portion 41 allows the number of fastening holes 49 to be reduced compared to when the first push-in portion 41 is not provided.

[Second small panel]
The second small panel 31 has the appearance shown in Fig. 10 and has an outer shape obtained by inverting the first small panel 21 shown in Fig. 8. That is, the second small panel 31 has a different front and back orientation from the first small panel 21, but has a panel main body 32 that is the same shape as the panel main body 22 of the first small panel 21, and three extension pieces 33 that are the same shape as the extension pieces 23 of the first small panel 21. Each extension piece 33 is provided with a second push-in portion 42, a fourth push-in portion 44, an alignment hole 48, and a fastening hole 49.

Each extension piece 33 can be folded perpendicular to the panel main body 32 or at an angle equal to a right angle along a folding line L1 provided at the boundary between the panel main body 32 and the extension piece 33. Of the front surface Sa and back surface Sb of the second small panel 31, the folding line L1 is formed only on the back surface Sb.

When creating the dome piece 12, the first small panel 21 and the second small panel 31 are joined together. Specifically, the first small panel 21 and the second small panel 31 are positioned adjacent to each other, and the extension piece 23 of the folded first small panel 21 and the extension piece 33 of the folded second small panel 31 are overlapped to connect the extension pieces. This joins the first small panel 21 and the second small panel 31 together.

As shown in Figure 7, the first small panel 21 and the second small panel 31 of the dome piece 12 are symmetrical with respect to the joining position of the panels; more specifically, they are line-symmetrical (i.e., mirror images). By joining the first small panel 21 and the second small panel 31, the panel body 22 of the first small panel 21 and the panel body 32 of the second small panel 31 are arranged symmetrically. Furthermore, both panel bodies 22, 32 are right-angled triangles or have the same shape as a right-angled triangle. Therefore, when the dome piece 12 is placed on the floor as shown in Figure 7 with the first small panel 21 and the second small panel 31 joined together, the bases of the two panel bodies 22, 32 will be aligned in a straight line (see Figure 7).

The second pressing portions 42 are pressed in together with the first pressing portions 41 when joining the panels together. As shown in FIG. 10, a pair of second pressing portions 42 is provided on one end and the other end of each extension piece 33 in the extension direction. Each second pressing portion 42 faces a first pressing portion 41 when the extension pieces are accurately overlapped. Note that the number of second pressing portions 42 provided on each extension piece 33 may be any number, as long as it is the same as the number of corresponding first pressing portions 41.

The pair of second pushing portions 42 each extend from a base end, with their tip ends in contact with each other. More specifically, as shown in FIG. 10, each second pushing portion 42 has a base end and an extending portion 50 adjacent to the base end. A notch is provided on the outer edge of the second pushing portion 42, excluding the base end (i.e., the outer edge of the extending portion 50).

The width of each portion of the extension portion 50 is equal to the length of the base end; in other words, the extension portion 50 has a rectangular shape. The width direction of the second pushing portion 42 is a direction that intersects with the extension direction of the corresponding extension piece 33 (specifically, perpendicular or the same direction as the perpendicular direction). The width of the extension portion 50 of the second pushing portion 42 is the length in the width direction of the second pushing portion 42. The width of the extension portion 50 is also shorter than the width of the connecting portion 46 of the first pushing portion 41; in other words, the width of the first pushing portion 41 is longer than the width of the second pushing portion 42.

Before the second pushing portions 42 are operated, as shown in FIG. 10, the pair of second pushing portions 42 are in a state in which the tips of their respective extension portions 50 are butted together. Furthermore, a bending line L6 is provided at the base end of each second pushing portion 42, and each second pushing portion 42 can be bent at the base end position. The bending line L6 extends along the width direction of the second pushing portion 42.

The fourth pressing portion 44 is a portion that is pressed in together with the third pressing portion 43 when joining the panels, and faces the third pressing portion 43 when the extension pieces are accurately overlapped. As shown in Figure 10, one fourth pressing portion 44 is provided in the center of each extension piece 33 in the extension direction. Note that the number of fourth pressing portions 44 provided on each extension piece 33 may be any number, as long as it is the same as the number of corresponding third pressing portions 43.

The fourth pushing portion 44 extends from the base end and, as shown in FIG. 10 , has a base end and an extending portion 50, similar to the second pushing portion 42. A notch is provided on the outer edge of the fourth pushing portion 44, excluding the base end (i.e., the outer edge of the extending portion 50). A bending line L7 is provided at the base end of the fourth pushing portion 44, allowing the fourth pushing portion 44 to be bent at the bending line L7. The bending line L7 extends along the width direction of the fourth pushing portion 44, which is a direction along the extension direction of the corresponding extension piece 33 (more specifically, parallel or the same direction as parallel). In other words, the extending direction of the bending line L6 and the extending direction of the bending line L7 intersect with each other, preferably perpendicular or at an angle equal to perpendicular.

The width of the extension portion 50 of the fourth pushing portion 44 is the length in the width direction of the fourth pushing portion 44, and is shorter than the width of the continuous portion 46 of the third pushing portion 43. In other words, the width of the third pushing portion 43 is longer than the width of the fourth pushing portion 44.

Alignment holes 48 are formed in the respective tip portions of the second and fourth push-ins 42 and 44 (more specifically, the tip portions of the extension portions 50). By aligning the alignment holes 48 of the first and second push-ins 41 and 42, the first and second push-ins 41 are correctly positioned and properly opposed to the corresponding second and second push-ins 42. Similarly, by aligning the alignment holes 48 of the third and fourth push-ins 43 and 44, the third and fourth push-ins 43 are correctly positioned and properly opposed to the corresponding fourth push-ins 44. The shapes of the alignment holes 48 formed in the second and fourth push-ins 42 and 44 are not particularly limited, but are preferably the same shape as the alignment holes 48 formed in the first and third push-ins 41 and 43.

Two fastening holes 49 are provided at each end of each extension piece 33 in the extension direction. The number of fastening holes 49 may be any number, but by providing the second push-in portions 42, the number can be reduced compared to when the second push-in portions 42 are not provided.

[Second large panel]
The second large panel 35 has the appearance shown in Fig. 11 and has an outer shape obtained by inverting the first large panel 25 shown in Fig. 9. That is, the second large panel 35 has a different front and back orientation from the first large panel 25, but has a panel main body 36 that is the same shape as the panel main body 26 of the first large panel 25, and five extension pieces 37 that are the same shape as the extension pieces 27 of the first large panel 25.

Each extension piece 37 can be folded approximately perpendicular to the panel main body 36 along a folding line L1 provided at the boundary between the panel main body 36 and the extension piece 37. Of the front surface Sa and back surface Sb of the second large panel 35, the folding line L1 is formed only on the back surface Sb.

When constructing the dome piece 12, the first large panel 25 and the second large panel 35 are joined together. Specifically, the first large panel 25 and the second large panel 35 are positioned adjacent to each other, and the extension piece 27 of the folded first large panel 25 and the extension piece 37 of the folded second large panel 35 are overlapped to connect the extension pieces. This joins the first large panel 25 and the second large panel 35.

As shown in Figure 7, the first and second large panels 25 and 35 of the dome piece 12 are symmetrical with respect to the joining position between the panels; more specifically, they are line-symmetrical (i.e., mirror images). By joining the first and second large panels 25 and 35, the panel body 26 of the first and second large panels 25 and 35 are arranged symmetrically. Furthermore, both panel bodies 26 and 36 are shaped like right triangles or are identical to right triangles. Therefore, when the dome piece 12 is placed on the floor as shown in Figure 7 with the first and second large panels 25 and 35 joined together, the bases of the two panel bodies 26 and 36 line up in a straight line (see Figure 7).

Furthermore, as shown in FIG. 11, the panel body 36 of the second large panel 35 has fold lines L4 and L5 formed thereon, similar to those of the first large panel 25 shown in FIG. 9. By gently bending the panel body 36 along the fold line L4, the rigidity of the panel body 36 is ensured and the strength of the panel body 36 can be made uniform across the fold line L4. Furthermore, by bending the panel body 36 along the fold line L5, the shape of the outer surface of the dome-shaped structure 10 can be made closer to a spherical shape.

Note that, among the outer edges of the panel body 36 shown in Figure 11, one extension piece 37 extending along the side K3 adjacent to the first small panel 21 is fastened to the extension piece 23 of the first small panel 21 when the first small panel 21 and the second large panel 35 are joined together.

Each extension piece 37 has a pair of second push-in portions 42 on both ends in the extension direction, and a fourth push-in portion 44 in the center in the extension direction. The configuration of each of the second push-in portions 42 and fourth push-in portions 44 is the same as that of the second small panel 31 shown in Figure 10. Note that the number of second push-in portions 42 and fourth push-in portions 44 provided on each extension piece 37 may be any number, as long as they are the same as the number of corresponding first push-in portions 41 and third push-in portions 43, respectively.

Also, in each extension piece 37, alignment holes 48 are formed at the tip end of each of the second push-in portion 42 and the fourth push-in portion 44 (more specifically, the tip end of the extension portion 50). Two fastening holes 49 are provided at each end of each extension piece 37 in the extension direction. While any number of fastening holes 49 may be provided, providing the second push-in portion 42 allows the number to be fewer than when the second push-in portion 42 is not provided.

<<Assembly procedure for the dome-shaped structure>>
Next, the procedure for assembling the dome-shaped structure 10 using the four types of panels 14 described above, namely, the first small panel 21, the first large panel 25, the second small panel 31, and the second large panel 35, will be described with reference to Figures 12 to 16.

To assemble one dome-shaped structure 10, the required number of panels 14 of each of the four types of panels 14 described above must be transported to the destination where the dome-shaped structure 10 will be used. In this case, the first small panel 21 and the second small panel 31 have the same outer shape, but flipped over, so they can be stacked and transported. Similarly, the first large panel 25 and the second large panel 35 also have the same outer shape, but flipped over, so they can be stacked and transported. As described above, in this embodiment, panels with the same outer shape can be transported together, making it easier to transport and store the panels 14.

In addition, in this embodiment, the panels 14 have only two different outer shapes, and because they are the same outer shape when inverted, fewer forms are required to cut the panels 14 from the cardboard sheets. Furthermore, each panel 14 has a fold line L1 only on the back surface Sb, making it possible to fold the extension piece in only one direction. This makes it easy to distinguish between the front and back of each panel 14. Furthermore, various functions (e.g., design features or waterproofing) can be imparted to the panels by applying printing and surface treatments during panel production. This makes it easier to impart these functions to each panel 14 than if work to impart these functions (e.g., applying waterproof paint) were performed on each panel 14 after the assembly of the dome-shaped structure 10 was completed.

Next, an even number (specifically, four types) of panels 14 are grouped into one panel set, and twelve dome pieces 12 are created from the even number (specifically, twelve sets) of panels. Specifically, bilaterally symmetrical combinations of panels are selected, and the selected panels are joined together. More specifically, a combination of a first small panel 21 and a second small panel 31 is selected, and these panels are joined together. A combination of a first large panel 25 and a second large panel 35 is also selected, and these panels are joined together. The two joined small panels are then joined together with the two joined large panels. In this way, if the number of first panels (specifically, the first small panels 21 and the first large panels 25) is the same as the number of second panels (specifically, the second small panels 31 and the second large panels 35), it is easy to determine the number of panels 14 that make up the dome pieces 12. This allows the worker to easily select the number of panels 14 required to make up the dome piece 12, allowing the dome piece 12 to be created correctly and easily.

In this embodiment, the first pressing portion 41 and the third pressing portion 43 are provided on the extension pieces 23, 27 of the first small panel 21 and the first large panel 25, but are not provided on the extension pieces 33, 37 of the second small panel 31 and the second large panel 35. On the other hand, the second pressing portion 42 and the fourth pressing portion 44 are provided on the extension pieces 33, 37 of the second small panel 31 and the second large panel 35, but are not provided on the extension pieces 23, 27 of the first small panel 21 and the first large panel 25. This makes it easy to select one panel 14 of a set (pair) of symmetrical panels by checking which pressing portion is provided on the extension piece.

Conventionally, symmetrical panels are fastened together with fastening members, and in order to select pairs of symmetrical panels, the panels are color-coded, for example by painting one panel one color and the other a different color. However, because each type of panel has a different color, assembling a dome-shaped structure using such panels results in the color of the exterior surface varying depending on the location. In contrast, in this embodiment, panels can be identified by looking at the shape of the press-in portion of the extension piece, so the panels can be a common color without being color-coded, and the exterior color of the dome-shaped structure 10 can be unified.

The number of panels 14 constituting each dome section 12 is an even number, specifically four, and is common to all dome sections 12. Having four panels 14 makes it easier for workers to identify the types of panels 14 constituting the dome sections 12 when assembling them. Furthermore, because the four panels 14 are divided into two types based on their external shapes when turned inside out, workers can more easily identify the panels 14. In this respect, the dome-shaped structure 10 of this embodiment is advantageous over conventional dome-shaped structures, such as geodesic domes, which use a large number of different panels. In other words, the more different types of panels are used, the more difficult it becomes for workers to identify the panels when assembling the dome-shaped structure 10. However, in this embodiment, the fewer different panel types are used compared to conventional structures, making assembly easier.

In this embodiment, the dome-shaped structure 10 is constructed by combining 12 dome pieces 12 of the same shape. Because the work involved in creating each dome piece 12 is the same for all dome pieces 12, the same work is repeated 12 times to create 12 dome pieces 12, and the dome-shaped structure 10 can be assembled by fastening these 12 dome pieces 12 together. Furthermore, when the number of dome pieces 12 that make up the dome-shaped structure 10 is 12, the number of dome pieces 12 is neither too few nor too many, so the amount of work required to create the dome pieces 12 is set to be appropriate.

Furthermore, when multiple workers or multiple groups work together to create 12 dome pieces 12, the number of pieces created per worker or per group can be reduced. For example, if a group consists of three or four people and three groups create 12 dome pieces 12, each group will create four dome pieces 12. In other words, the process of selecting the four types of panels 14 needed to create a dome piece 12 and joining the panels 14 needed to create one dome piece 12 will be repeated a total of four times. In this case, reducing the number of pieces created per worker or per group ensures that each worker has enough work to master the dome piece 12 creation procedure, preventing each worker from becoming bored and reducing the workload. As a result, the work can be carried out accurately with an appropriate number of workers, and the occurrence of worker errors (human error) can be reduced.

When joining panels together, first align the front and back of each of the two adjacent panels 14 (i.e., the first panel and the second panel), and then fold the extension pieces 23, 27, 33, and 37 on each panel 14 along the fold line L1 at the boundary between the extension piece and the panel body. Because the fold line L1 is only provided on the back surface Sb of each panel 14, the front and back of each panel 14 can be easily identified by looking at the fold line L1, and the front and back of each panel 14 can be easily aligned.

Then, with the folded extension pieces overlapping each other, the first pushing portion 41 is pressed in, fastening the extension pieces together. More specifically, the extension pieces 23, 27 provided with the first pushing portion 41 are overlapped with the extension pieces 33, 37 provided with the second pushing portion 42 so that the first pushing portion 41 and the second pushing portion 42 face each other. At this time, the worker can accurately and easily overlap the first pushing portion 41 and the second pushing portion 42 by aligning the alignment hole 48 provided in the first pushing portion 41 with the alignment hole 48 provided in the second pushing portion 42.

After overlapping the first pushing portion 41 and the second pushing portion 42, the worker pushes the first pushing portion 41 toward the second pushing portion 42. As a result, as shown in Figures 13 and 14, the first pushing portion 41 bends together with the second pushing portion 42 while overlapping with the second pushing portion 42, and enters the inside of the insertion hole 51. The insertion hole 51 is a hole formed in the extension piece 33, 37 (i.e., the extension piece of the second panel) on which the second pushing portion 42 is provided as the second pushing portion 42 is bent. When the first pushing portion 41 enters the inside of the insertion hole 51, the protrusions 47 provided on both sides of the continuous portion 46 of the first pushing portion 41 bend, as shown in Figure 13. Then, when the first pushing portion 41 is completely inserted into the insertion hole 51, the bent protrusion 47 attempts to return to its original position, and as shown in Figure 13, the protrusion 47 engages with the edge of the insertion hole 51.

The above operation is repeated for all of the first push-in portions 41 provided on the extension pieces 23, 27 on the first panel side of the two overlapping extension pieces. As a result, the panels (i.e., the first panel and the second panel) are joined together. As described above, in this embodiment, the panels can be joined together with a simple one-touch operation of pressing in the first push-in portion 41.

Furthermore, the worker presses in the third pushing portion 43 located at the center of the extension pieces 23, 27 in the extension direction to more firmly fasten the extension pieces together. More specifically, the third pushing portion 43 and the fourth pushing portion 44 are overlapped so that they face each other. By aligning the alignment hole 48 in the third pushing portion 43 with the alignment hole 48 in the fourth pushing portion 44, the third pushing portion 43 and the fourth pushing portion 44 can be accurately and easily overlapped.

After overlapping the third push-in portion 43 and the fourth push-in portion 44, the worker pushes the third push-in portion 43 toward the fourth push-in portion 44. As a result, as shown in Figures 15 and 16, the third push-in portion 43 bends together with the fourth push-in portion 44 while overlapping with it, and enters the inside of the insertion hole 52. The insertion hole 52 is a hole formed in the extension piece 33, 37 (i.e., the extension piece of the second panel) on which the fourth push-in portion 44 is provided as the fourth push-in portion 44 is bent. When the third push-in portion 43 enters the inside of the insertion hole 52, the protrusions 47 provided on both sides of the continuous portion 46 of the third push-in portion 43 bend, as shown in Figure 15. Then, when the third pushing portion 43 is completely inserted into the insertion hole 52, the bent protrusion 47 attempts to return to its original position, and as shown in Figure 15, the protrusion 47 engages with the edge of the insertion hole 52.

In this embodiment, as shown in FIG. 8, the direction in which the fold line L2 of the first push-in portion 41 extends intersects with the direction in which the fold line L3 of the third push-in portion 43 extends. Correspondingly, as shown in FIG. 10, the direction in which the fold line L6 of the second push-in portion 42 extends intersects with the direction in which the fold line L7 of the fourth push-in portion 44 extends. In other words, the bending directions are different between the first push-in portion 41 and the third push-in portion 43. More specifically, as shown in FIGS. 13 and 15, the orientations of the protrusions 47 that engage with the edges of the insertion holes 51 and 52 are different. This allows the extension pieces to be more firmly fastened together even when various external forces act on the joined panels from the top, bottom, or left, right, and specifically prevents the overlapping extension pieces from separating from each other and creating gaps between the extension pieces.

Then, to further securely fasten the overlapping extension pieces together, a fastening member is passed through the fastening holes 49 provided in each extension piece, and the extension pieces are fastened together with the fastening member. In this embodiment, the extension pieces are fastened together by pushing in the first pushing portion 41 and the third pushing portion 43, which reduces the amount of bundling work using the bundling member, making it easier to create the dome pieces 12. Furthermore, reducing the amount of bundling work reduces the chance of workers making mistakes and leaving areas unbound. Furthermore, because the amount of bundling member used can be reduced, the amount of waste generated during assembly or dismantling of the dome-shaped structure 10 can be reduced.

Through the above steps, 12 dome pieces 12 are created, and then workers assemble the 12 dome pieces 12 to form the dome-shaped structure 10. To explain in more detail, the lower dome piece 18 is assembled using eight dome pieces 12, and the upper dome piece 16 is assembled using four dome pieces 12. When assembling the lower dome piece 18 and the upper dome piece 16, the shapes of each part and the dome pieces 12 are uniform, which simplifies the assembly process.

In addition, in this embodiment, the upper dome section 16 and the lower dome section 18 can be assembled separately, improving work efficiency. In other words, since there is no need to assemble the lower dome section 18 and then assemble the upper dome section 16 above the lower dome section 18, assembling the upper dome section 16 can be done at ground or floor height without using a stepladder or the like. When assembling the lower dome section 18, eight dome sections 12 are arranged in a circular ring. At this time, each dome section 12 is arranged so that two adjacent dome sections 12 are symmetrical with respect to the boundary between the dome sections. When assembling the upper dome section 16, four dome sections 12 are arranged in a circle around the apex of the upper dome section 16. At this time, each dome section 12 is arranged so that two adjacent dome sections 12 are symmetrical with respect to the boundary between the dome sections.

Next, adjacent dome pieces are joined together. In this case, just as when creating the dome pieces 12, the extension pieces of adjacent dome pieces 12 are overlapped, and the first and third push-in portions 41 and 43 are pressed in to join the dome pieces together. This allows the dome pieces to be joined together by the simple operation of pressing in the first and third push-in portions 41 and 43.

Alternatively, a binding member can be passed through each fastening hole 49 of the overlapping extension pieces to more firmly fasten the extension pieces together. However, because the dome pieces can be joined by pressing the first and third pressing sections 41 and 43 together, the amount of binding work can be reduced, making it easier to assemble the dome-shaped structure 10. Furthermore, reducing the amount of binding work reduces the number of areas that need to be bound, and reduces the amount of binding material used.

After the assembly of the upper dome section 16 and the lower dome section 18 is complete, the worker places the upper dome section 16 on top of the lower dome section 18 and joins the dome pieces 12 that make up the upper dome section 16 to the dome pieces 12 that make up the lower dome section 18. In this case, as with the above, the extension pieces of adjacent dome pieces 12 are overlapped, and the first push-in section 41 and the third push-in section 43 are pressed in to join the dome pieces together.

The dome-shaped structure 10 is constructed (assembled) by combining the 12 dome pieces 12 in the above manner. When the dome-shaped structure 10 is constructed, the folding lines L1 of the extension pieces 23, 27, 33, and 37 are formed on the back surface of each panel 14, so that the folded extension pieces 23, 27, 33, and 37 of each panel 14 are all positioned inside the dome-shaped structure 10. This avoids the inconvenience that would occur if the folded extension pieces were positioned outside the dome-shaped structure 10. Specifically, it is possible to prevent rainwater or snow from accumulating on the extension pieces 23, 27, 33, and 37.

After the dome-shaped structure 10 has been assembled, workers apply waterproof tape to the joints between the dome pieces (i.e., the boundary positions between the dome pieces) and the joints between the panels of the dome pieces 12 (i.e., the boundary positions between the panels) to seal them. In this embodiment, the joints between the dome pieces and the joints between the panels of the dome-shaped structure 10 are aligned in a straight line. In other words, the dome pieces 12 and the panels 14 are each designed so that the joints between the dome pieces and the joints between the panels are aligned in a straight line. This allows waterproof tape to be easily applied to each joint, making the work much easier than performing the same work on a conventional dome-shaped structure such as a geodesic dome.

DESCRIPTION OF SYMBOLS 10 Dome-shaped structure 12 Dome piece 14 Panel 16 Upper dome portion 18 Lower dome portion 21 First small panel 22 Panel body 23 Extension piece 25 First large panel 26 Panel body 27 Extension piece 31 Second small panel 32 Panel body 33 Extension piece 35 Second panel 36 Panel body 37 Extension piece 41 First pressed-in portion 42 Second pressed-in portion 43 Third pressed-in portion 44 Fourth pressed-in portion 45 Root portion 46 Continuing portion 47 Protruding portion 48 Alignment hole 49 Fastening hole 50 Extension portion 51, 52 Insertion holes 60 Dome fuselage structure 62 Opening 100 Structural unit K1 to K3 Adjacent sides L1 to L7 Bending line Sa Front surface Sb Back surface

Claims (15)

A dome-shaped structure constructed by combining a plurality of dome pieces,
Among the plurality of dome pieces, two adjacent dome pieces have symmetrical shapes with respect to a boundary position between the two dome pieces,
each of the plurality of dome pieces is formed by joining a first panel to a second panel that is the same in number as the first panels and has a symmetrical shape with respect to a boundary position with the first panel ;
a circular dome lower portion and a dome upper portion placed on the dome lower portion,
The dome lower portion is configured by arranging two or more of the dome pieces in an annular shape,
The dome upper portion is a dome-shaped structure formed by arranging two or more dome pieces around the highest point of the dome upper portion . The dome-shaped structure of claim 1, wherein the number of dome segments is an even number. Each of the first panel and the second panel includes:
A polygonal panel body,
an extension piece extending along the outer edge of the panel body and adjacent to the panel body;
the extension piece is bendable along a bending line formed at a boundary between the panel main body and the extension piece,
The dome-shaped structure according to claim 1 or 2, wherein the first panel and the second panel are joined together with the respective extension pieces folded and overlapped. each of the first panel and the second panel has a front surface and a back surface;
The dome-shaped structure according to claim 3 , wherein the folding lines are formed on the rear surface. The extension piece of the first panel is provided with a first pressing portion,
The extension piece of the second panel is provided with a second pressing portion,
5. The dome-shaped structure of claim 3, wherein the first pushing portion is pushed toward the second pushing portion while overlapping the second pushing portion, thereby bending together with the second pushing portion and inserting into the inside of the insertion hole formed in the extension piece of the second panel as the second pushing portion is bent. In the extension piece of the first panel, a bending line of the first pressed-in portion is provided at a base end of the first pressed-in portion, and a notch is provided in a portion of an outer edge of the first pressed-in portion other than the base end,
In the extension piece of the second panel, a bending line of the second pressed-in portion is provided at a base end of the second pressed-in portion, and a notch is provided at a portion of an outer edge of the second pressed-in portion other than the base end,
protrusions are provided on both sides of the first pushing portion, the protrusions protruding outward in a width direction of the first pushing portion,
6. The dome-shaped structure according to claim 5, wherein the protrusion of the first pushing portion that has entered the inside of the insertion hole engages with an edge of the insertion hole, thereby joining the first panel and the second panel. The dome-shaped structure described in claim 5 or 6, wherein each of the first and second pushing portions has an alignment hole formed therein. The first pressing portion is provided at an end side of the extension piece of the first panel in the extension direction, and the third pressing portion is provided at a central portion of the extension piece in the extension direction,
The second pressing portion is provided at an end side of the extension piece of the second panel in the extension direction, and the fourth pressing portion is provided at a central portion of the extension piece in the extension direction,
8. A dome-shaped structure as described in any one of claims 5 to 7, wherein the third pushing portion is overlapped with the fourth pushing portion and pushed toward the fourth pushing portion, thereby bending together with the fourth pushing portion and entering inside another insertion hole formed in the extension piece of the second panel as the fourth pushing portion is bent. a direction in which a bending line formed at a base end of the first pushing portion extends and a direction in which a bending line formed at a base end of the third pushing portion extends intersect with each other;
9. The dome-shaped structure according to claim 8, wherein the direction in which the bending line formed at the base end of the second pushing portion extends intersects with the direction in which the bending line formed at the base end of the fourth pushing portion extends. the first pressing portion and the third pressing portion are provided on the extending piece of the first panel of the first and second panels,
The dome-shaped structure according to claim 8 or 9, wherein the second pressing portion and the fourth pressing portion are provided on the extension piece of the second panel out of the first panel and the second panel. The dome-shaped structure described in any one of claims 3 to 10, wherein, when the dome-shaped structure is constructed by combining the multiple dome pieces, the extension piece of the bent first panel and the extension piece of the bent second panel are located inside the dome-shaped structure. A dome-shaped structure as described in any one of claims 1 to 11, wherein the first panel and the second panel are made of cardboard. A dome-shaped structure according to any one of claims 1 to 12 ;
a dome fuselage structure disposed below and alongside the dome structure,
A structural unit, wherein the outer edge of the upper end of the dome fuselage structure and the outer edge of the lower end of the dome fuselage structure are the same size. A panel used in the dome-shaped structure according to any one of claims 1 to 12 ,
A panel used as the first panel or the second panel in each of the plurality of dome pieces that make up the dome-shaped structure. A panel set used in the dome-shaped structure according to any one of claims 1 to 12 ,
the first panel and the same number of the second panels as the first panels;
The first panel and the second panel included in the panel set constitute one dome piece among the plurality of dome pieces.