Plate-like member and three-dimensional structure using plate-like member

Abstract

[Problem] To provide a joined three-dimensional structure formed by combining plate-like members with each other. [Solution] Provided is a three-dimensional structure obtained by using a first plate-like member 2, a second plate-like member 8, and a third plate-like member 13 having the same plate thickness and height. On the first plate-like member 2, a first notch part 2, a second notch part 5, and a connection part 205 are formed at equal intervals. On the second plate-like member 8, a first notch part 9, a second notch part 12, and a connection part 912 are formed at equal intervals. On the third plate-like member 13, a first notch part 14, second notch parts 17, and a connection part 1417 are formed at equal intervals. The first plate-like member 2, the second plate-like member 8, and the third plate-like member 13 are engaged with each other to form an engagement part 30, an engagement part 31, and an engagement part 32, whereby an equilateral triangle is formed with an interval between the notch parts as one side, inside of which a leaf member 26 composed of two fourth plate-like members 20 and one fifth plate-like member 23 is fitted.

Description

Plate-like members and three-dimensional structures using plate-like members

[0001] The present invention relates to a method for joining multiple metal plate-like members and to a three-dimensional structure formed by combining multiple metal plate-like members.

[0002] Japan has a long history of using traditional patterns in arts and crafts such as textiles, ceramics, and interior decoration. Traditional patterns are understood as Japanese designs that are patterned and arranged regularly. Representative traditional patterns include hemp leaf, tortoise shell, wave pattern, and Shippo (seven treasures). These traditional patterns have been used in kimonos, tenugui (hand towels), fusuma (sliding door) paper, kumiko (latticework) patterns in building materials, and decorations for regional festivals, adding color to daily life.

[0003] On the other hand, in various fields including civil engineering and construction, various three-dimensional structures such as truss structures and lattice structures, which are composed of tubular members such as wood, aluminum, and steel pipes, as well as rod-shaped members or plate-shaped members, are used.

[0004] Patent Document 1 discloses a steel pipe truss having steel pipe main members and diagonal members, etc., in which the truss members can be reliably joined using relatively simple and low-cost bolted joining fittings, the steel pipe truss can be constructed at low cost, and the position of each node can be easily adjusted to ensure the accuracy of the entire truss. In this steel pipe truss, split-type joining fittings made by dividing a sheath pipe made of a circular steel pipe of a predetermined length into multiple parts in the circumferential direction are used at the truss nodes, and these joining fittings are tightly bound to the outer circumference of the upper chord members and lower chord members and joined by friction, and the ends of the diagonal members and other connecting members are bolted using the fastening flange of these joining fittings.

[0005] The plate joining structure described in Patent Document 2 is a plate joining structure using a first metal plate 1, a second metal plate 2, and a third metal plate 3. The first plate 1 has multiple first notches extending downward from the horizontally elongated upper end at predetermined intervals along its longitudinal direction. The second plate 2 has multiple pairs of notches extending upward from the horizontally elongated upper end and downward from the lower end in the same straight line as the upper notch, at predetermined intervals along its longitudinal direction. The third plate 3 has multiple third notches extending upward from the horizontally elongated lower end at predetermined intervals along its longitudinal direction. Each of the lower notches is fitted into each of the first notches to join the first plate and the second plate, and each of the third notches is fitted into each of the upper notches to join the first plate 1, the second plate 2, and the third plate 3.

[0006] Japanese Patent Publication No. 2004-293266 Japanese Patent Publication No. 2023-125475

[0007] However, traditional patterns are primarily enjoyed for their visual appeal and for understanding their origins and meanings. Using these traditional patterns themselves as three-dimensional structures in various fields, including civil engineering and architecture, has not been a common practice until now.

[0008] The steel pipe truss disclosed in Patent Document 1 requires friction bonding of connecting fittings to the outer circumference of the main truss members, and the ends of the secondary truss members to these connecting fittings. The process of bonding such connecting fittings to the outer circumference of the main truss members is generally considered difficult to control in terms of precision. Furthermore, the plate joint structure disclosed in Patent Document 2 involves providing the same notch in each member and joining the members to form an equilateral triangle, but such a pattern is not considered a traditional pattern.

[0009] Therefore, the present invention has been made in view of the above circumstances, and aims to provide a method for joining plate-shaped members that can join plate-shaped members together with high precision, and a three-dimensional structure formed by combining plate-shaped members. Another objective is to provide a method for joining structural members that can give the appearance of a three-dimensional structure the appearance of multiple metal structural members arranged regularly.

[0010] The inventors of the present invention conducted diligent studies to achieve the above objectives and found that the problems could be solved by forming multiple types of notches in a metal plate-like member and then combining these multiple metal plate-like members to form a three-dimensional structure, thus completing the present invention.

[0011] In other words, the present invention is a three-dimensional structure using a first plate-like member (2), a second plate-like member (8), and a third plate-like member (13) having the same plate thickness and height, wherein the first plate-like member (2) has a first notch (2), a second notch (5), and a connecting portion (205) formed at equal intervals from the upper end to the lower end, the second plate-like member (8) has a first notch (9) formed at equal intervals from the lower end to the upper end, a second notch (12) formed at equal intervals from the upper end to the lower end, and the third plate-like member (13) has a first notch (14), a second notch (17), and a connecting portion (1417) formed at equal intervals from the lower end to the upper end, and the first plate-like member (2), the second plate-like member (8), and the third plate The shaped member (13) engages with each other, and the first notch (2), the second notch (12), and the connecting portion (1417) engage to form an engaging portion (30), the second notch (5), the connecting portion (912), and the second notch (17) engage to form an engaging portion (31), the connecting portion (205), the first notch (9), and the first notch (14) engage to form an engaging portion (32) is formed, and equilateral triangles are formed with sides equal to the distance between each notch in the first plate-like member (2), the second plate-like member (8), and the third plate-like member (13). A leaf member (26) consisting of two fourth plate-like members (20) and one fifth plate-like member (23) is fitted inside each of the equilateral triangles, making it a three-dimensional structure using plate-like members.

[0012] The present invention provides a method for joining structural members that enables high-precision joining of constituent members, and a three-dimensional structure formed by combining these structural members.

[0013] Furthermore, the present invention provides a method for joining structural members that allows the appearance of a three-dimensional structure to be that of regularly arranged structural members.

[0014] Figure 1 shows a hemp leaf pattern. Figure 2 shows a part of the engagement state of the first embodiment of the plate joint structure according to the present invention. Figure 3 shows a front view (a) and a perspective view (b) of the first plate-shaped member 1. Figure 4 shows the first notch 2 viewed from above in the depth direction. Figure 5 shows the first notch 5 viewed from above in the depth direction. Figure 6 shows a front view (a) and a cross-sectional view (b) of the first plate-shaped member 1. Figure 7 shows a front view (a) and a perspective view (b) of the second plate-shaped member 8. Figure 8 explains the first notch 9 and the second notch 12. Figure 9 shows a front view (a) and a cross-sectional view (b) of the second plate-shaped member 8. Figure 10 shows a front view (a) and a perspective view (b) of the third plate-shaped member 13. Figure 11 shows the first notch 14 viewed from a lower viewpoint in the depth direction. Figure 12 shows the second notch 17 viewed from a lower viewpoint in the depth direction. Figure 13 shows a front view (a) and a cross-sectional view (b) of the third plate-like member 13. Figure 14 shows a plan view and a side view of the fourth plate-like member 20 and the fifth plate-like member 25. Figure 15 illustrates the left-right length in the side view of the fourth plate-like member 20 and the fifth plate-like member 25. Figure 16 shows a plan view and a perspective view of the leaf member 26. Figure 17 shows a method for joining the three-dimensional structure of the plate-like members. Figure 18 shows a plan view of the three-dimensional structure of the plate-like members according to this embodiment.

[0015] The embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the embodiments described below.

[0016] (First Embodiment) This embodiment describes a three-dimensional structure that imitates the hemp leaf pattern, one of the traditional patterns, using a metal plate-like member 1 as a component. The hemp leaf pattern is a pattern as shown in Figure 1, and is understood to be a pattern based on a star shape formed by connecting the centroid of six equilateral triangles formed by the diagonals of a regular hexagon to each vertex. In addition, the same reference numerals are used for the same or corresponding parts in each drawing. Furthermore, although lengths are described in some places, these lengths are provided as examples to aid understanding and are not limited to the lengths described therein. Furthermore, the phrase "same" is not limited to identical parts, but also includes those within the margin of error. To give an example of the margin of error, it could be approximately ±10 mm, but is not limited to this error. Herein, in the description of the present invention, the horizontal direction is defined as the left-right direction, and the vertical direction as the up-down direction, with the reference being when the longitudinal direction of the metal plate-like member is arranged so that the longitudinal direction is the horizontal direction. In addition, the thickness direction of the metal plate-like member is defined as the front direction and the back direction. More specifically, in Figure 3, the horizontal direction in Figure 3(a) is defined as the left-right direction, and the vertical direction as the up-down direction. Also, in Figure 3(b), the thickness direction is defined as the front direction and the back direction.

[0017] (Metal plate-shaped member) The material of the metal plate-shaped member that can be used in this embodiment is not particularly limited as long as it is made of metal. Examples include steel pipes made of carbon steel, stainless steel or alloys, aluminum pipes made of aluminum alloys, and copper pipes made of pure copper or copper alloys.

[0018] (Three-dimensional structure of plate-like members) Figure 2 is a diagram showing a part of the engagement state of the first embodiment of the three-dimensional structure of plate-like members according to the present invention. The three-dimensional structure of plate-like members is formed by engaging a first plate-like member 1, a second plate-like member 8, and a third plate-like member 13, which are metal plate-like members having the same thickness (plate thickness) and the same height, with each other. Next, although not shown in Figure 2, two fourth plate-like members 20 and one fifth plate-like member 23 are combined (hereinafter sometimes referred to as leaf members) and engaged inside the equilateral triangle formed by the first plate-like member 2, the second plate-like member 8, and the third plate-like member 13. In the first embodiment, the thickness of the first plate-like member 1, the second plate-like member 8, the third plate-like member 13, the fourth plate-like member, and the fifth plate-like member 23 is about 3 mm, and the height is about 75 mm.

[0019] (First Plate-Shaped Member 1) The first plate-shaped member 1 will be described using Figure 3. Figure 3 shows a front view (a) and a perspective view (b) of the first plate-shaped member 1. As shown in Figures 3(a) and 3(b), the first plate-shaped member 1 has a first notch 2 and a second notch 5 formed continuously from the upper end to the lower end. The first notch 2 and the second notch 5 are formed at equal intervals in the left-right direction on the upper end of the first plate-shaped member 1.

[0020] The vertical lengths of the first notch 2 and the second notch 5 are both one-third the vertical length of the first plate-like member 1. By setting the lengths in this manner, the first plate-like member 1, the second plate-like member 8, and the third plate-like member 13 engage flush with each other.

[0021] The first notch 2 will be explained in detail with reference to Figure 4. Figure 4 shows the first notch 2 as viewed from above in the depth direction. The first notch 2 is composed of a left notch part 3 and a right notch part 4. The left notch part 3 is at vertex 2a １ and vertex 2b １ Side 2A connecting the two sides １ And vertex 2c １ and vertex 2b １ The edge 2B connecting them. １is formed such that the angle formed therebetween is 120°. Further, side 2A １ and side 2B １ are formed to have the same length. Accordingly, vertex 2a １ , vertex 2b １ and vertex 2c １ as respective vertices form an isosceles triangle. The distance between vertex 2a １ and vertex 2c １ is equal to the thickness of the first plate-shaped member, and vertex 2b １ is located on the center line Y of the first plate-shaped member 1.

[0022] The notch right portion 4 is formed such that the angle formed between vertex 2a ２ and vertex 2b ２ connected by side 2A ２ and vertex 2c １ and vertex 2b １ connected by side 2B ２ is 120°. Further, side 2A ２ and side 2B ２ are formed to have the same length. Accordingly, the triangle having vertex 2a ２ , vertex 2b ２ and vertex 2c ２ as vertices is an isosceles triangle, and vertex 2b ２ is located on the center line Y of the first plate-shaped member 1. The distance between vertex 2a ２ and vertex 2c ２ is equal to the thickness of the first plate-shaped member. Further, each vertex of the notch left portion 3 and each vertex of the notch right portion 4 correspond to each other and are formed to be symmetrical.

[0023] The distance between vertex 2b １ and vertex 2b ２ is, for engaging the second plate-shaped member 2 and the third plate-shaped member 13, a distance obtained by adding the length of clearance α to the thickness X of the second plate-shaped member in the left-right direction respectively. Although the length of clearance α depends on the thickness of each plate-shaped member, when the thickness is about 3 mm, it is preferably approximately about 0.2 to 0.4 mm. Accordingly, when the thickness is about 3 mm, the vertex 2b １ and vertex 2b ２The distance between them will be approximately 3.4 mm to 3.8 mm. Alternatively, the clearance α should be within a range of approximately 1 / 25 to 1 / 15 of the thickness X. The second plate-shaped member can be engaged with the first plate-shaped member 1 while taking into account variations in the thickness of the plate-shaped members and variations in the processing accuracy of the plate-shaped members.

[0024] The second notch 5 will be explained in detail with reference to Figure 5. Figure 5 shows the first notch 5 as viewed from above in the depth direction, assuming that there is no part corresponding to the first notch 2. The second notch 5 is composed of the left side of the notch 6 and the right side of the notch 7. The left side of the notch 6 has a vertex 5a １ and vertex 5b １ Side 5A connecting to １ A vertex 5a is formed on the right side of the notch 7. ２ and vertex 5b ２ Side 5A connecting to ２ It is formed. Also, side 5A １ and side 5A ２ It is formed parallel to the right at an angle of 60°. Furthermore, side 5A １ and side 5A ２ The length between the two is such that the second plate-shaped member 8 and the third plate-shaped member 13 engage with the second notch 5, as described above at point 2b １ and vertex 2b ２ It is formed to be identical in distance between them.

[0025] Figure 6 shows a front view (a) and a cross-sectional view (b) of the first plate-like member 1. As shown in Figure 6(a), the first plate-like member 1 has a first notch 2, a second notch 5, and a connecting portion 205 formed continuously from the upper end to the lower end. Therefore, as shown in Figure 6(b), the cross-sectional view of the first notch 2 and the cross-sectional view of the second notch 5 have different shapes. The first notch 2, the second notch 3, and the connecting portion (205) are formed at equal intervals in the left-right direction at the upper end of the first plate-like member 1. The number of first notches 2 and second notches 5 on the first plate-like member 1 can be set as appropriate. Furthermore, the shape of the end can also be set as appropriate. In other words, it is possible to form multiple first plate-like members 1 in a continuous manner in the left-right direction, and it is also possible to form the end of the joint structure of the plate-like members without providing a notch at the end.

[0026] (Second plate-shaped member 8) The second plate-shaped member 8 will be described using Figure 7. Figure 7 shows a front view (a) and a perspective view (b) of the second plate-shaped member 8. As shown in Figures 7(a) and 7(b), the second plate-shaped member 8 has a first notch 9 extending from the lower end to the upper end and a second notch 12 extending from the upper end to the lower end. The first notch 9 and the second notch 12 are formed at equal intervals on the upper end of the first plate-shaped member 1 in the left-right direction and are formed at corresponding positions in the up-down direction.

[0027] The vertical lengths of the first notch 9 and the second notch 12 are both one-third the vertical length of the second plate-like member 8. By setting the lengths in this manner, the first plate-like member 1, the second plate-like member 8, and the third plate-like member 13 engage flush with each other.

[0028] The first notch 9 will be described in detail using Figure 8(a). Figure 8(a) shows the first notch 9 viewed from a lower perspective in the depth direction. The first notch 9 is composed of a left notch portion 10 and a right notch portion 11. The left notch portion 10 has a vertex 9a １ and vertex 9b １Side 9A connecting to １ A vertex 9a is formed on the right side of the notch 11. ２ and vertex 9b ２ Side 9A connecting to ２ A is formed. Also, side 9A １ and side 9A ２ It is formed parallel to the right at an angle of 60°. Furthermore, side 9A １ and side 9A ２ The length between the first plate-shaped member 1 and the third plate-shaped member 13 is such that they engage with the second notch 9, as described above at point 2b １ and vertex 2b ２ It is formed to be equal to the distance between them.

[0029] The second notch 12 will be described in detail using Figure 8(b). Figure 8(b) shows the second notch 12 as viewed from above in the depth direction. The second notch 12 consists of a left notch portion 121 and a right notch portion 122. The left notch portion 13 has a vertex 12a １ and vertex 12b １ Side 12A connecting to １ A vertex 12a is formed on the right side of the notch 14. ２ and vertex 12b ２ Side 12A connecting to ２ A is formed. Also, side 12A １ and side 12A ２ These are formed parallel to the right at an angle of 120°. Furthermore, side 12A １ and side 12A ２ The length between the first plate-shaped member 1 and the third plate-shaped member 13 is such that they engage with the second notch 12, as described above at point 2b １ and vertex 2b ２ It is formed to be equal to the distance between them.

[0030] Figure 9 shows a front view (a) and a cross-sectional view (b) of the second plate-like member 8. As shown in Figure 9(a), the second plate-like member 8 has a first notch 9 extending from the lower end to the upper end, a second notch 12 extending from the upper end to the lower end, and a connecting portion 912 between these notches. The first notch 9 is formed parallel to the right at an angle of 120°. On the other hand, the second notch 12 is formed parallel to the right at an angle of 60°. The first notch 9, the second notch 12, and the connecting portion (912) are formed at equal intervals on the lower end of the second plate-like member 8 in the left-right direction. Furthermore, as can be seen from the cross-sectional views of the first notch 9 and the second notch 12, each notch is formed to be symmetrical. Furthermore, the number of first notches 9 and second notches 12 in the second plate-like member 8 can be set as appropriate. In addition, the shape of the end can also be set as appropriate. That is, it is possible to form multiple second plate-like members 8 so that they are continuous in the left-right direction, or it is possible to have the end of the plate-like member joint structure without providing a notch at the end.

[0031] (Third plate-shaped member 13) The third plate-shaped member 13 will be described using Figure 10. Figure 10 shows a front view (a) and a perspective view (b) of the third plate-shaped member 13. As shown in Figures 10(a) and 10(b), the third plate-shaped member 13 has a first notch 14 and a second notch 17 formed continuously from the lower end to the upper end. The first notch 14 and the second notch 17 are formed at equal intervals in the left-right direction at the lower end of the third plate-shaped member 13. The first notch 14 and the second notch 17 formed on the third plate-shaped member 13 and the first notch 2 and the second notch 5 formed on the first plate-shaped member 1 are of the same shape.

[0032] The vertical lengths of the first notch 14 and the second notch 17 are both one-third the vertical length of the third plate-like member 13. By setting the lengths in this way, the first plate-like member 1, the second plate-like member 8, and the third plate-like member 13 are engaged flush with each other.

[0033] The first notch 14 will be described in detail with reference to FIG. 11. FIG. 11 is a view of the first notch 14 viewed from a lower viewpoint in the depth direction. The first notch 14 is composed of a notch left side portion 15 and a notch right side portion 16. The notch left side portion 15 has a vertex 14a １ and a vertex 14b １ connecting side 14A １ and a vertex 14c １ and the vertex 14b １ connecting side 14B １ is formed such that the angle formed therebetween is 120°. Further, the side 14A １ and the side 14B １ are formed to have the same length. Therefore, the vertex 14a １ , vertex 14b １ and vertex 14c １ is an isosceles triangle. Note that the vertex 14a １ and the vertex 14c １ has the same thickness as that of the third plate-like member 13, and the vertex 2b １ is located on the center line Y of the first plate-like member 1.

[0034] The notch right side portion 16 has a vertex 14a ２ and a vertex 14b ２ connecting side 14A ２ and a vertex 14c １ and the vertex 14b １ connecting side 14B ２ is formed such that the angle formed therebetween is 120°. Further, the side 14A ２ and the side 14B ２ are formed to have the same length. Therefore, the vertex 14a ２ , vertex 14b ２ and vertex 14c ２ is an isosceles triangle. Note that the vertex 14a ２ and the vertex 14c ２ has the same thickness as that of the third plate-like member 13, and the vertex 14b ２is located on the center line Y of the third plate-like member 13. Further, each vertex of the left notch portion 15 and each vertex of the right notch portion 16 correspond to each other and are formed to be symmetrical.

[0035] Vertex 14b １ and vertex 14b ２ is a distance obtained by adding the length of clearance α in the left-right direction to the thickness X of the second plate-like member 8 in order to engage the first plate-like member 1 and the second plate-like member 8. Although the length of clearance α depends on the thickness of each plate-like member, when the thickness is approximately 3 mm, it is preferably approximately 0.2 to 0.4 mm. Therefore, when the thickness is approximately 3 mm, the vertex 14b １ and vertex 14b ２ is approximately 3.4 mm to 3.8 mm. Alternatively, the clearance α is preferably set to fall within a range of approximately 1 / 25 to 1 / 15 of the thickness X. The third plate-like member 13 can be engaged with the second plate-like member 8 while taking into consideration variations in the thickness of the plate-like members and fluctuations in processing accuracy of the plate-like members. Note that vertex 14b １ and vertex 14b ２ is the same as the distance between vertex 2b １ and vertex 2b ２ .

[0036] The second notch 17 will be described in detail with reference to FIG. 12. FIG. 12 is a view of the second notch 17 viewed from a lower viewpoint in the depth direction, assuming that there is no portion corresponding to the first notch 14. The second notch 17 is composed of a left notch portion 18 and a right notch portion 19. Further, on the left notch portion 18, there is a vertex 17a １ and vertex 17b １ connecting side 17A １ is formed. On the other hand, on the right notch portion 19, there is a vertex 17a ２ and vertex 17b ２ connecting side 17A ２ is formed. Further, side 17A １ and side 17A ２These are formed parallel to the right at an angle of 120°. Furthermore, side 17A １ and side 17A ２ The length between the first plate-shaped member 1 and the second plate-shaped member 13 is such that they engage with the second notch 17, as mentioned above at point 2b １ and vertex 2b ２ It is formed to be equal to the distance between them.

[0037] Figure 13 shows a front view (a) and a cross-sectional view (b) of the third plate-like member 13. As shown in Figure 13(a), the third plate-like member 13 has a first notch 14, a second notch 17, and a connecting portion (1417) formed continuously from the lower end to the upper end. Therefore, as shown in Figure 13(b), the cross-sectional view of the first notch 14 and the cross-sectional view of the second notch 17 have different shapes. The first notch 14, the second notch 17, and the connecting portion (1417) are formed at equal intervals in the left-right direction at the lower end of the first plate-like member 13. The number of first notches 14 and second notches 17 on the third plate-like member 13 can be set as appropriate. Furthermore, the shape of the end can also be set as appropriate. In other words, it is possible to form multiple first plate-like members 13 in a continuous manner in the left-right direction, and it is also possible to form the end of the joint structure of the plate-like members without providing a notch at the end.

[0038] (Fourth plate-like member 20 and fifth plate-like member 23) The fourth plate-like member 20 and the fifth plate-like member 23 will be described using Figure 14. Figure 14 shows a plan view (a) and a side view (b) of the fourth plate-like member 20 and the fifth plate-like member 23. A leaf member 26 is created by joining two fourth plate-like members 20 and one fifth plate-like member 23. As shown in Figure 16, the leaf member 26 is a plate-like member used to fit into the interiors of a plurality of equilateral triangles formed from the first plate-like member 2, the first plate-like member 8, and the third plate-like member 13. As shown in the plan view of Figure 14(a), the left end of the fourth plate-like member 20 has a vertex 20a １ and vertex 20a ２A notch 21 is formed, consisting of the side 20A connecting the two sides. Side 20A has an angle of 30° with respect to the left. On the other hand, at the right end of the fourth plate-like member 20, there is a vertex 20b １ and vertex 20b ２ Side 20B connecting the two sides １ And vertex 20b ３ and vertex 20b ２ Side 20B connecting the two sides ２ The tip portion 22 is formed such that the angle it forms with the other is 60°.

[0039] As shown in the plan view of Figure 14(b), the left end of the fifth plate-like member 23 has a vertex 23a １ and vertex 23a ２ Side 23A connecting the two sides １ and vertex 23a ３ and vertex 23a ２ Side 23A connecting the two sides ２ The tip portion 24 is formed such that the angle it makes with the other is 120°. On the other hand, the right end of the fifth plate-like member 23 has a vertex 23b １ and vertex 23b ２ Side 23B connecting them １ And vertex 23b ３ and vertex 23b ２ Side 23B connecting them ２ The tip portion 25 is formed such that the angle it forms with the tip is 60°.

[0040] The plate thickness and vertical length, i.e., the height, of the fourth plate-like member 20 and the fifth plate-like member 23 are the same as the height lengths of the first plate-like member 1, the second plate-like member 8, and the third plate-like member 13. By making the heights the same, they can be engaged flush with each other. Furthermore, by making the thicknesses the same, the thickness of all the plate-like members can be made uniform, giving a sense of unity to the three-dimensional structure of the plate-like members.

[0041] Let's describe the length in the left-right direction in the side view of the fourth plate-shaped member 20. First, as a premise, since the tip portion 22 of the fourth plate-shaped member 20 has an angle of 60°, the tip portion 22 can be fitted into the vertex of the equilateral triangle formed by the first plate-shaped member 2, the second plate-shaped member 8, and the third plate-shaped member 13. As shown in Figure 15, one of the 20a of the fourth plate-shaped member 20 １ and the other fourth plate-shaped member 20a １ The four plates are positioned such that the angle between them is 120°. The length from this positioned position to the point where the tip 22 of the fourth plate-shaped member 20 can be fitted into the vertex of the equilateral triangle is defined as the length in the left-right direction of the fourth plate-shaped member 20 in the side view. This length coincides with the length in the left-right direction of the side view in Figure 14(a).

[0042] Let's explain the length in the left-right direction in the side view of the fifth plate-shaped member 23. First, as a premise, the tip portion 24 of the fifth plate-shaped member 23 has an angle of 120°. Then, the length of the 20a1 of one of the fourth plate-shaped members 20 and the length of the 20a of the other fourth plate-shaped member 20 １ The fifth plate-shaped member 23 can be positioned on the opposite side of the first plate-shaped member 2, which is positioned at a 120° angle. Furthermore, since the tip 25 of the fifth plate-shaped member 23 has a 60° angle, the tip 25 can be fitted into the vertex of the equilateral triangle formed by the first plate-shaped member 2, the second plate-shaped member 8, and the third plate-shaped member 13. The length of the fifth plate-shaped member 23 in the left-right direction in the side view, that is, the vertex 23b of the tip 25. ２ , the 20a of the first fourth plate-shaped member 20 １ and the other fourth plate-shaped member 20a １ It is positioned so as not to touch the intersection point with the tip portion 25. ２The fifth plate-shaped member 23 is positioned so that there is a clearance β between it and the intersection. In other words, the length of the fifth plate-shaped member 23 in the side view is shorter than the length of the fourth plate-shaped member 20 in the side view by the length of the clearance β. Here, the clearance β is set in relation to the clearance α to be within the range of the following equation 1. (Equation 1) α < β < 3α By setting the clearance β to the above range, it becomes possible to fit the leaf member 26 inside the equilateral triangle while taking into account variations in the thickness of the plate-shaped members and variations in the processing accuracy of the plate-shaped members. If the clearance β is longer than 3α, the lengths of the two fourth plate-shaped members 20 and the fifth plate-shaped member 23 will be different even to the naked eye, which may result in an unbalanced leaf member. The length of the fifth plate-shaped member 23 in the side view is the same as the length of the side view in Figure 14(b). Alternatively, the leaf member 26 may be joined by welding the fourth plate-shaped member 20 and the fifth plate-shaped member 23 at their center points.

[0043] (Method for joining three-dimensional structures of plate-like members) As shown in Figure 17(a), each first notch 9 of the second plate-like member 8 is inserted through each first notch 2 of the first plate-like member 1, and each first notch 9 of the second plate-like member 8 is engaged with each second notch 5 of the first plate-like member, thereby engaging the second plate-like member 8 with the first plate-like member 1.

[0044] Figure 17(b) shows the state in which the first plate-shaped member 1 and the second plate-shaped member 8 are engaged. As can be seen from Figure 17(b), by engaging the first plate-shaped member 1 and the second plate-shaped member 8, the first notches 2 in the first plate-shaped member 1 and the second notches 12 in the second plate-shaped member 8 overlap to form a notch 27. In addition, the second notch 5 in the first plate-shaped member 1 and the connecting portion 912 between the first notch 9 and the second notch 12 in the second plate-shaped member 8 engage to form an engaging portion 28. Furthermore, the connecting portion 25 in the first plate-shaped member 1 and the first notch 9 in the second plate-shaped member 8 engage to form an engaging portion 29.

[0045] Next, the first notch 14 of the third plate-shaped member 13 is inserted into the notch 27, the first notch 14 of the third plate-shaped member 13 is engaged with the engaging portion 29, and the second notch 17 of the third plate-shaped member is engaged with the engaging portion 28. Furthermore, the connecting portion 1417 of the third plate-shaped member 13 is engaged with the notch 27.

[0046] As described above, by engaging the third plate-shaped member 13 with the first plate-shaped member 1 and the second plate-shaped member 8, an engaging portion 30 is formed from each first notch 2 in the first plate-shaped member 1, each second notch 12 in the second plate-shaped member 8, and the connecting portion 1417 in the third plate-shaped member 13. Furthermore, an engaging portion 31 is formed from each second notch 5 in the first plate-shaped member 1, each connecting portion 912 in the second plate-shaped member 8, and the second notch 17 in the third plate-shaped member 13. In addition, an engaging portion 32 is formed from each connecting portion 205 in the first plate-shaped member 1, each first notch 9 in the second plate-shaped member 8, and the first notch 14 in the third plate-shaped member 13. Furthermore, although not shown in the diagram, clearance α is exposed at each of the engaging portions 30-32.

[0047] By engaging the first plate-like member 1, the second plate-like member 8, and the third plate-like member 13, an equilateral triangle is formed with the distance between the notches in each plate-like member as one side.

[0048] Next, the three-dimensional structure of the plate-like members can be joined by fitting the leaf member 26 into the equilateral triangle formed by the first plate-like member 1, the second plate-like member 8, and the third plate-like member 13. The leaf member may be formed by fitting two fourth plate-like members 20 and one fifth plate-like member into the equilateral triangle, or the fourth plate-like member 20 and the fifth plate-like member 23 may be joined in advance by welding or other means to form a leaf member, which may then be fitted into the equilateral triangle.

[0049] Figure 18 shows a plan view of the three-dimensional structure of the plate-like member according to this embodiment, obtained by the joining method described above.

[0050] The three-dimensional structure according to this embodiment can be used as general furniture, store fixtures, general and store building interior materials, general and store exterior building materials, doorways, fences, decorative blocks, walls and other decorative materials, etc. Furthermore, because it is composed of metal plate-like members, it has excellent durability, fire resistance, weight capacity, and seismic resistance.

[0051] 1. First plate-like member 2. First notch 3. Left side of the notch 4. Right side of the notch 5. Second notch 6. Left side of the notch 7. Right side of the notch 8. Second plate-like member 9. First notch 10. Left side of the notch 11. Right side of the notch 12. Second notch 121. Left side of the notch 122. Right side of the notch 13. Second plate-like member 14. First notch 15. Left side of the notch 16. Right side of the notch 17. Second notch 18. Left side of the notch 19. Right side of the notch 20. Fourth plate-like member 21. Notch 22. Tip 23. Fifth plate-like member 24. Tip 25. Tip 26 Leaf member 27 Notch 28 Engaging part 29 Engaging part 30 Engaging part 31 Engaging part 32 Engaging part

Claims

1. A three-dimensional structure using a first plate-like member (2), a second plate-like member (8), and a third plate-like member (13) having the same plate thickness and height, wherein the first plate-like member (2) has a first notch (2), a second notch (5), and a connecting portion (205) formed at equal intervals from the upper end to the lower end, the second plate-like member (8) has a first notch (9) formed at equal intervals from the lower end to the upper end, a second notch (12) formed at equal intervals from the upper end to the lower end, and the third plate-like member (13) has a first notch (14), a second notch (17), and a connecting portion (1417) formed at equal intervals from the lower end to the upper end. The first plate-shaped member (2), the second plate-shaped member (8), and the third plate-shaped member (13) are engaged with each other, forming an engaging portion (30) where the first notch (2), the second notch (12), and the connecting portion (1417) are engaged, an engaging portion (31) where the second notch (5), the connecting portion (912), and the second notch (17) are engaged, and an engaging portion (32) where the connecting portion (205), the first notch (9), and the first notch (14) are engaged, forming an equilateral triangle with the distance between each notch in the first plate-shaped member (2), the second plate-shaped member (8), and the third plate-shaped member (13) as one side. A three-dimensional structure using plate-like members, wherein a leaf member (26) consisting of two fourth plate-like members (20) and one fifth plate-like member (23) is fitted inside each of the aforementioned equilateral triangles.

2. The first notch (2) is composed of a left notch (3) and a right notch (4), and the left notch (3) and the right notch (4) form an isosceles triangle with a vertex of 120°, the second notch (5) is composed of a left notch (6) and a right notch (7), and the left notch (6) and the right notch (7) are formed parallel to each other at an angle of 60° to the right, the first notch (9) is composed of a left notch (10) and a right notch (11), and the left notch (10) and the right notch (11) are formed parallel to each other at an angle of 60° to the right, A three-dimensional structure using a plate-like member as described in claim 1, wherein the second notch (12) is composed of a left notch portion (121) and a right notch portion (122), and the left notch portion (121) and the right notch portion (122) are formed parallel to each other at an angle of 120° to the right; the first notch (14) is composed of a left notch portion (15) and a right notch portion (16), and the left notch portion (15) and the right notch portion (16) are isosceles triangles with vertices at 120°; and the second notch (17) is composed of a left notch portion (18) and a right notch portion (19), and the left notch portion (18) and the right notch portion (19) are formed parallel to each other at an angle of 120° to the right.

3. A three-dimensional structure using plate-like members according to claim 1 or claim 2, wherein a notch 21 is formed at the left end of the fourth plate-like member (20) at an angle of 30° to the left, a tip portion (22) with a vertex of 60° is formed at the right end of the fourth plate-like member (20), a tip portion (24) with a vertex of 120° is formed at the left end of the fifth plate-like member (23), and a tip portion (25) with a vertex of 60° is formed at the right end of the fifth plate-like member (23).

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