Joint structure, decoration method, and joint structure assembly

Abstract

A connection structure (1) includes: a first structure (10); and a second structure (20) that is detachably connected to the first structure (10), the first structure (10) has a first insertion portion, the second structure (20) has a second insertion portion that is detachably fitted to the first insertion portion, at least one of the first insertion portion and the second insertion portion is a periodic structure having an elastic anisotropy that is different in different directions, when a direction in which the first insertion portion and the second insertion portion are fitted to each other is defined as a first direction and a direction orthogonal to the first direction is defined as a second direction, the elasticity in the second direction of the anisotropic elastic structure is greater than the elasticity in the first direction of the anisotropic elastic structure.

Description

Technical Field

[0001] This invention relates to connecting structures, decorative methods using the connecting structures, and connecting structure components. Background Technology

[0002] Conventionally, functional building structures have been used as building materials such as wall materials, interior materials, flooring materials, or ceiling materials. Such structures, for example, have a base material that serves as a support and functional layers laminated onto the base material (e.g., Patent Document 1). The functional layers are endowed with various functions depending on their use or purpose.

[0003] In such structures, the functional layer and the substrate are fixed together using adhesives. Furthermore, adhesives are generally used to fix two structural elements, not limited to architectural structures.

[0004] Prior art literature

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2020-062775 Summary of the Invention

[0007] The problem the invention aims to solve

[0008] However, when manufacturing structures that use adhesives to fix two components together, it is difficult to fix them with good precision. Therefore, the process of fixing two components with adhesives is difficult to automate. Furthermore, even if this process could be automated, the cost would be high.

[0009] Furthermore, once two structures are fixed together with adhesive, it is difficult to make corrections later, and it is also difficult to separate the two structures. For example, in a structure where the substrate and the functional layer are fixed together with adhesive, it is difficult to remove the functional layer from the substrate.

[0010] Furthermore, since adhesives are mostly composed of petroleum-derived resins, the act of fixing structures using adhesives itself increases the environmental burden. Additionally, in structures where a substrate and functional layer are bonded together, even assuming the functional layer can be removed from the substrate, unwanted adhesive often adheres to it, making it difficult to reuse or recycle the removed layer. In such cases, removing and incinerating the adhesive-laden layer leads to the emission of carbon dioxide, a greenhouse gas. Thus, the method of fixing two structures using adhesives presents a significant environmental problem.

[0011] Therefore, techniques for detachably connecting two structures were investigated. For example, in a structure having a substrate and a functional layer, the case of detachably fitting and connecting the substrate and the functional layer was studied. In this case, as an insert, a protrusion is considered on one side of the substrate and the functional layer, and a recess is considered on the other side. The substrate and the functional layer are connected by inserting the protrusion and the recess, or the substrate and the functional layer are separated by removing the inserted protrusion and the recess.

[0012] However, in existing connection structures that detachably connect two structures by interlocking convex and concave portions to form interlocking parts, the detachment performance (ease of interlocking and ease of removal) and the performance of maintaining the connection state are opposite and in a trade-off relationship, making it difficult to balance detachment performance and the performance of maintaining the connection state.

[0013] For example, when improving the loading and unloading performance to make the protrusions and recesses easy to insert or remove, the retention performance of the connection state decreases, and the two connected structures are prone to detachment. That is, after connecting two structures, sometimes the two structures will separate even if they are not intended to be separated. On the other hand, when improving the retention performance of the connection state, the protrusions and recesses become difficult to insert or remove, and the loading and unloading performance decreases.

[0014] The present invention was proposed to solve such a problem, and its purpose is to provide a connecting structure or a decoration method using the connecting structure, the connecting structure having two detachable structures, each having an insert portion, and being able to achieve both detachment performance and connection state retention performance.

[0015] Problem-solving methods

[0016] One embodiment of the connecting structure of the present invention comprises: a first structure; and a second structure detachably connected to the first structure, the first structure having a first insert portion, and the second structure having a second insert portion detachably fitted into the first insert portion, wherein at least one of the first insert portion and the second insert portion is an anisotropic elastic structure having a periodic structure and having different elasticity depending on the direction, wherein when the insert direction of the first insert portion and the second insert portion being inserted into each other is defined as a first direction, and a direction orthogonal to the first direction is defined as a second direction, the elasticity of the anisotropic elastic structure in the second direction is greater than the elasticity of the anisotropic elastic structure in the first direction.

[0017] Furthermore, one aspect of the decoration method of the present invention is a method of decoration by utilizing or reusing the aforementioned connecting structures.

[0018] Furthermore, one embodiment of the connecting structure assembly of the present invention comprises: a first structure having a first insert portion; and a second structure having a second insert portion detachably fitted with the first insert portion, wherein the first structure and the second structure can be connected by inserting the first insert portion and the second insert portion, wherein at least one of the first insert portion and the second insert portion is an anisotropic elastic structure having a periodic structure and having different elasticity depending on the direction, wherein when the insert direction of the first insert portion and the second insert portion being inserted into each other is set as a first direction, and a direction orthogonal to the first direction is set as a second direction, the elasticity of the anisotropic elastic structure in the second direction is greater than the elasticity of the anisotropic elastic structure in the first direction.

[0019] The effects of the invention

[0020] According to the present invention, in two detachable structures each having an insert, it is possible to achieve both loading / unloading performance and retention of connection state. Attached Figure Description

[0021] Figure 1 This is a diagram showing the structure of the first and second test pieces, modeled using a 3D printer.

[0022] Figure 2 This is a diagram showing the direction of the impacts applied to test pieces 1, 2, and 3 when evaluating impact resistance.

[0023] Figure 3 This is a diagram showing the direction of the tensile stress applied to test pieces 1, 2, and 3 when evaluating thermophysical properties.

[0024] Figure 4 This is a graph showing the directional anisotropy and temperature dependence of the elastic modulus of resin structures made by 3D printers.

[0025] Figure 5 This is a schematic cross-sectional view of the connecting structure of Embodiment 1.

[0026] Figure 6 This is a cross-sectional view showing the situation where the first structure and the second structure constituting the connecting structure of Embodiment 1 are connected.

[0027] Figure 7 This is a cross-sectional view schematically showing a modified example of the connecting structure of Embodiment 1.

[0028] Figure 8 The diagram shows the structure of the connecting structure of Embodiment 1 and the connecting structures of Comparative Examples 1 to 4, and shows the evaluation results of the loading / unloading performance and retention performance of each connecting structure.

[0029] Figure 9 This is a cross-sectional view showing the situation where the first structure and the second structure are connected in the connecting structure of Embodiment 2.

[0030] Figure 10 This is a cross-sectional view showing the connection structure in a modified example of Embodiment 2, where the first structure and the second structure are connected.

[0031] Figure 11 This is a cross-sectional view showing the connection structure in Embodiment 3, where the first structure, the second structure, and the third structure are connected.

[0032] Figure 12 This is a diagram showing the structure of the anisotropic elastic structure of variation example 1.

[0033] Figure 13 This is a diagram showing the structure of the anisotropic elastic structure in variation example 2.

[0034] Figure 14 This is a diagram showing the structure of the anisotropic elastic structure of variation example 3. Detailed Implementation

[0035] (The process of obtaining one aspect of the present invention)

[0036] Before describing the embodiments of the present invention, one method of obtaining the present invention will be described.

[0037] In recent years, 3D printers have been used to create three-dimensional structures. A 3D printer is a type of three-dimensional modeling machine that uses 3D data created on a computer as a design blueprint to create a three-dimensional structure according to that design blueprint.

[0038] In the technology of creating three-dimensional structures using 3D printers, various modeling methods exist depending on the properties of the materials used. For example, known modeling methods using 3D printers include bath photopolymerization, material jetting, and material extrusion. In these cases, photocurable resins are used in bath photopolymerization and material jetting, while thermoplastic resins are used in material extrusion.

[0039] 3D printers that use resin as a modeling material (3D resin printers) create shapes by layering resin. For example, in 3D printers using liquid bath photopolymerization and material jetting methods, ultraviolet-curable resin is used as the modeling material, and the resin is sprayed out layer by layer while being cured by ultraviolet light. This process is repeated to layer resin layers and create a three-dimensional structure of a specified shape. In other words, the three-dimensional structure created by a 3D resin printer has a periodic structure with multiple resin layers repeating periodically, and the interfaces between the resin layers are integrated into a single piece without being bonded by adhesives.

[0040] Here, the inventors of this application focus on the physical properties of three-dimensional structures modeled by 3D resin printers, actually produce three-dimensional structures modeled by 3D printers using resin as the modeling material, conduct experiments, and carry out various studies.

[0041] As a result, the inventors of this application discovered that for three-dimensional structures modeled with resin using a 3D printer, the mechanical strength and thermophysical properties differ depending on the resin's layering direction (modeling direction) and other directions. That is, they found that the mechanical strength and thermophysical properties of resin three-dimensional structures modeled with a 3D printer are dependent on the modeling direction. The following describes the experiments conducted by the inventors of this application and their evaluation results.

[0042] First, a rectangular three-dimensional structure was created using a 3D printer employing a material jetting method, with the resin material serving as the prototype. An acrylic UV-curable resin was used as the modeling material.

[0043] In this case, two identical test pieces were fabricated with different resin lamination directions (molding directions). Specifically, such as... Figure 1 As shown, a first test piece TS was fabricated with the resin lamination direction orthogonal to the length direction of the cuboid as the resin lamination direction, and a second test piece HS was fabricated with the resin lamination direction of the length direction of the cuboid as the resin lamination direction. That is, the first test piece TS is formed by horizontally stacking resin layers, and the second test piece HS is formed by vertically stacking resin layers. In addition, the first test piece TS and the second test piece HS have the same shape.

[0044] Furthermore, although not illustrated, the third test piece RD, made of resin material, was manufactured using an injection molding machine rather than a 3D printer, resulting in a cuboid with the same shape as the first test piece TS and the second test piece HS. The third test piece RD was also made using an acrylic UV-curable resin. Moreover, because the third test piece RD was manufactured using injection molding, unlike the first test piece TS and the second test piece HS, it lacks a resin lamination direction.

[0045] Furthermore, for the first test piece TS, the second test piece HS, and the third test piece RD, test pieces made by irradiating ultraviolet light with a mercury lamp (high energy) and test pieces made by irradiating ultraviolet light with a UV-LED (low energy) were prepared respectively.

[0046] In addition, Figure 1 In the diagram, the lines shown for each cuboid are for the purpose of understanding the stacking direction of the resin layers and are not lines that are actually visible. In addition, the number of boundary lines is not an accurate number.

[0047] Then, in order to evaluate the impact resistance and thermophysical properties (heat resistance) of these test pieces, the following measurements were performed.

[0048] First, in order to evaluate impact resistance, such as Figure 2 As shown, impacts were applied to test pieces TS (transverse lamination), HS (longitudinal lamination), and RD (injection molding) from directions orthogonal to the length of the cuboid, and the cantilever impact strength (kJ / m²) was measured as an indicator of impact resistance. 2 ).in addition, Figure 2 The arrows indicate the impact direction. Specifically, the impact direction in test piece TS (1st test piece) is parallel to the resin lamination direction. Conversely, the impact direction in test piece HS (2nd test piece) is parallel to a direction orthogonal to the resin lamination direction.

[0049] The results of this measurement show that for the third test piece RD, the cantilever impact strength (hereinafter "impact strength") is the same whether using a mercury lamp or a UV-LED. However, for the first test piece TS and the second test piece HS, which were produced by a 3D printer, the impact strength is different when using a mercury lamp and when using a UV-LED. Furthermore, the impact strength is also different between the first test piece TS and the second test piece HS.

[0050] Specifically, it can be seen that when using a mercury lamp, the impact strength of test piece 1 (TS) and test piece 2 (HS) is lower than that of test piece 3 (RD). That is, it can be seen that if manufactured using a 3D printer, the impact resistance decreases. In particular, it can be seen that the impact strength of test piece 1 (TS) is not significantly lower than that of test piece 3 (RD), but the impact strength of test piece 2 (HS) is significantly lower than that of test piece 3 (RD), and the impact resistance is greatly reduced.

[0051] Furthermore, it is known that when using UV-LED, the impact strength of the first test piece TS and the second test piece HS, produced by the 3D printer, is not reduced compared to the third test piece RD, exhibiting the same or better impact resistance. Additionally, it is also known that the first test piece TS has a higher impact strength than the second test piece HS, and its impact resistance is superior compared to the second test piece HS.

[0052] Next, in order to evaluate thermophysical properties (heat resistance), such as Figure 3 As shown, tensile stress was applied along the length of the cuboid to test pieces TS (transverse lamination), HS (longitudinal lamination), and RD (injection molding), and the temperature (°C) and elastic modulus E (Pa) were measured. Additionally, Figure 3 The arrows indicate the direction of the tensile stress. That is, the direction of the tensile stress applied to the first test piece TS is parallel to the direction orthogonal to the resin lamination direction, and the direction of the tensile stress applied to the second test piece HS is parallel to the resin lamination direction.

[0053] The test results show that the third test piece RD has the same heat resistance whether using a mercury lamp or a UV-LED. However, the thermophysical properties of the first test piece TS and the second test piece HS, which were made by 3D printers, are different when using a mercury lamp and when using a UV-LED. Furthermore, the thermophysical properties are also different between the first test piece TS and the second test piece HS.

[0054] Specifically, regarding the use of mercury lamps, it is known that the elastic modulus of the first test piece TS and the second test piece HS produced by the 3D printer is lower than that of the third test piece RD, resulting in reduced heat resistance. In particular, it is known that while the elastic modulus of the first test piece TS is lower than that of the third test piece RD within the migration region of 50°C to 100°C, which represents a decrease in elastic modulus with increasing temperature, the elastic modulus of the first test piece TS is almost unchanged within the range of 0°C to 50°C and above 100°C, a region where the elastic modulus remains constant even with increasing temperature. On the other hand, it is known that within any temperature range (e.g., 0°C to 150°C), the elastic modulus of the second test piece HS is lower than that of the third test piece RD, and the elastic modulus of the second test piece HS is also lower than that of the first test piece TS.

[0055] Thus, it can be seen that the elastic modulus decreases when using a 3D printer, and that the elastic modulus differs between the first test piece TS and the second test piece HS. That is, it can be concluded that the first test piece TS and the second test piece HS, produced by a 3D printer, exhibit anisotropic elasticity relative to the resin lamination direction (molding direction). Specifically, as... Figure 4As shown, the elastic modulus E' of the second test piece HS (longitudinal stacking) is lower than that of the first test piece TS (transverse stacking). That is, the elasticity of the second test piece HS is greater than that of the first test piece TS. Thus, for structures modeled by a 3D printer, it can be seen that the elasticity of the resin in the stacking direction (modeling direction) is greater (i.e., it is easier to deform).

[0056] Furthermore, regarding the use of UV-LEDs, it is known that the elastic modulus of the first test piece TS and the second test piece HS, produced by the 3D printer, is lower than that of the third test piece RD within the migration region of 50℃ to 100℃. However, within a certain range of 0℃ to 50℃ and above 100℃, they have the same elastic modulus as the third test piece RD. Additionally, the elastic modulus curves of the first test piece TS and the second test piece HS are approximately consistent; within any range of 0℃ to 100℃, the elastic modulus of the first test piece TS is equal to that of the second test piece HS.

[0057] That is, it can also be seen that, when using UV-LED, for the range of 0℃~50℃ and above 100℃, the first test piece TS, the second test piece HS, and the third test piece RD have the same elastic modulus and the elasticity is not very anisotropic.

[0058] Thus, the different degrees of elasticity reduction in the first test piece TS and the second test piece HS, modeled by a 3D printer, compared to the third test piece RD, modeled by injection molding, under different conditions—one using a mercury lamp and the other using a UV-LED—can be attributed to the fact that the energy from ultraviolet light irradiation using a mercury lamp is higher than that from UV-LED irradiation, resulting in more thorough curing of each resin layer and less interfacial bonding. Conversely, under UV-LED irradiation, the lower energy and oxygen inhibition cause the resin layers to be stacked sequentially containing uncured components, resulting in a continuous phase at the resin layer interfaces, reduced anisotropy, and ultimately, the same physical properties as the injection-molded product.

[0059] Based on the above experimental results, the inventors of this application have obtained the following insights: When a three-dimensional structure with a periodic structure of multiple resin layers is shaped by a 3D printer, the shaped three-dimensional structure becomes a single piece where the interfaces between the resin layers are not bonded together by an adhesive, and it becomes a structure with different elastic moduli (i.e., different elastic properties) in the resin stacking direction (shaping direction) and in directions orthogonal to the stacking direction. That is, the following insights have been obtained: A three-dimensional structure shaped using resin by a 3D printer exhibits anisotropic elasticity in the resin stacking direction and in directions orthogonal to the stacking direction.

[0060] Based on the above insights, the inventors of this application have discovered a novel connecting structure that, as a substitute for adhesive in connecting structures that connect two structures, achieves excellent loading / unloading performance and retention performance, both of which have been difficult to balance until now. Specifically, by applying this insight to protrusions and / or recesses that fit together as inserts, a connecting structure having a pair of structures with excellent loading / unloading performance and retention performance has been discovered.

[0061] The following describes embodiments of the present invention conceived based on this understanding. Furthermore, the embodiments described below represent specific examples of the present invention. Therefore, the numerical values, constituent elements, arrangement and connection methods of constituent elements, and processes (steps) and their order shown in the following embodiments are examples and are not intended to limit the present invention. Therefore, constituent elements in the constituent elements of the following embodiments that are not described in the independent technical solution representing the highest-level concept of the present invention are described as arbitrary constituent elements.

[0062] Furthermore, the figures are schematic diagrams and not necessarily rigorous illustrations. Also, in each figure, substantially identical structures are labeled with the same reference numerals, and repetitive descriptions are omitted or simplified.

[0063] (Implementation Method 1)

[0064] First, use Figure 5 and Figure 6 The structure of the connecting structure 1 in Embodiment 1 will be described. Figure 5 This is a schematic cross-sectional view of the connecting structure 1 of embodiment 1. Figure 6 This is a cross-sectional view showing the first structure 10 and the second structure 20 that form the connecting structure 1.

[0065] like Figure 5 As shown, the connecting structure 1 of this embodiment has a first structure 10 and a second structure 20 detachably connected to the first structure 10. The first structure 10 and the second structure 20 constitute a pair of connectors that are detachably connected to each other. That is, the first structure 10 and the second structure 20 are detachably connected via a pair of inserts (insertion structures) that form the connecting structure, and the user can combine or separate the first structure 10 and the second structure 20.

[0066] The connecting structure 1 in this embodiment can be used as a building component. For example, the connecting structure 1 can be used as a building material such as wall material (inner wall material, outer wall material), interior material, floor material, ceiling material, or partition wall.

[0067] The first structure 10 (first connector) has at least one protrusion 11 as a first insert. In this embodiment, the first structure 10 has a plurality of protrusions 11. The plurality of protrusions 11 have the same shape.

[0068] The first structure 10 is a flat sheet member having a main surface 12. The main surface 12 is the surface opposite to the second structure 20. In this embodiment, the main surface 12 of the first structure 10 is a plane. In addition, the thickness of the first structure 10 excluding the portion with protrusion 11 is constant, and the other main surfaces opposite to the main surface 12 are also planes.

[0069] Each of the plurality of protrusions 11 is formed as a projection protruding from the main surface 12. In this embodiment, each of the plurality of protrusions 11 is spherical, and the root portion on the side of the main surface 12 is formed in a manner that tapers in the middle. Therefore, the surface of each protrusion 11 is a convexly curved surface, specifically a convex spherical surface. Specifically, the cross-sectional shape of each spherical protrusion 11 is, for example, a perfect circle or an ellipse, but is not limited to a perfect circle or an ellipse as long as the shape is close to a circle.

[0070] The first structure 10 can be formed from a flexible raw material and shape. This improves the loading and unloading performance of the first structure 10 and the second structure 20, and makes it easier to utilize the connecting structure 1 for interior decoration and other applications. For example, the first structure 10 can be a flexible sheet material. As an example, the thickness of the first structure 10 is 0.1 mm or more and less than 3.0 cm.

[0071] Furthermore, the first structure 10 can be a rigid body. Therefore, even if external forces or other stresses are applied to the connecting structure 1, deformation of the connecting structure 1 can be suppressed. Thus, a connecting structure 1 that is not easily deformed relative to stress can be achieved.

[0072] The second structure 20 (the second connector) has at least one recess 21 as a second insert portion that can be detachably fitted into the protrusion 11 of the first structure 10. In this embodiment, the second structure 20 has a plurality of recesses 21. The plurality of recesses 21 have the same shape.

[0073] The second structure 20 is a flat sheet member having a main surface 22. In this embodiment, the main surface 22 of the second structure 20 is a plane. The main surface 22 is the surface opposite to the first structure 10. In addition, the thickness of the second structure 20, except for the recess 21, is constant, and the other main surfaces opposite to the main surface 22 are also planes.

[0074] Multiple recesses 21 are bottomed holes formed by recessing from the main surface 22. The protrusions 11 of the first structure 10 and the recesses 21 of the second structure 20 are interlocking convex-concave structures (male-female structures). That is, the protrusions 11 (male structure) and the recesses 21 (female structure) can be interlocking shapes. Specifically, the protrusions 11 and the recesses 21 can be the same shape with a convex-concave relationship. In this case, in this embodiment, since the protrusions 11 are spherical, the recesses 21 are recessed into a spherical shape to allow the protrusions 11 to be inserted. Therefore, the surface of the recesses 21 is a curved surface that is bent into a concave shape, specifically a concave spherical surface.

[0075] Furthermore, the shapes of the protrusion 11 and the recess 21 are not limited to spherical shapes. For example, such as Figure 7 As shown in the connecting structure 1A, the protrusion 11A of the first structure 10A and the recess 21A of the second structure 20A can be prisms. Alternatively, the protrusion 11A and the recess 21A can be cylinders, or frustums with a conical or inverted conical surface. When the protrusion 11A and the recess 21A are frustums, they can be frustums of cones, triangular frustums, or square frustums, or other multi-faceted frustums.

[0076] The second structure 20 can be a rigid body. In particular, the rigidity of the second structure 20 can be greater than that of the first structure 10. Therefore, the second structure 20 can be used as a support for the first structure 10. In this case, the thickness of the second structure 20 can be greater than that of the first structure 10. Furthermore, the thickness of the second structure 20 is not particularly limited and can be the same as that of the first structure 10, being 0.1 mm or more and less than 3.0 cm.

[0077] Furthermore, the second structure 20, like the first structure 10, can also be formed from flexible raw materials and shapes. For example, the second structure 20 can also be a flexible sheet like the first structure 10.

[0078] like Figure 5 As shown, when the protrusion 11 and the recess 21 are engaged, the entire surface of the protrusion 11 and the entire surface of the recess 21 are in close contact. However, as long as the protrusion 11 and the recess 21 are shapes that can be engaged, it is not necessary for the entire surface of the protrusion 11 and the entire surface of the recess 21 to be in contact. That is, even when the protrusion 11 and the recess 21 are engaged, there may be a partial gap between the surface of the protrusion 11 and the surface of the recess 21.

[0079] Furthermore, the number of protrusions 11 and recesses 21 does not necessarily need to be the same, but in this embodiment, the number of protrusions 11 and recesses 21 is the same and they correspond one-to-one. Therefore, the protrusions 11 and recesses 21 are formed in a fully fitted position. For example, as Figure 6 As shown, when the main surface 12 of the first structure 10 is opposite to the main surface 22 of the second structure 20, a plurality of protrusions 11 and a plurality of recesses 21 are formed in completely opposite positions.

[0080] like Figure 6 As shown, the first structure 10 and the second structure 20 are connected by the interlocking of the protrusion 11 and the recess 21. For example, as Figure 6 As shown, by inserting the protrusion 11 of the first structure 10 into the recess 21 of the second structure 20, the protrusion 11 and the recess 21 are fitted together, thus connecting the first structure 10 and the second structure 20. Specifically, by inserting the protrusion 11 into the recess 21 and pressing the protrusion 11 into the recess 21, the protrusion 11 can be embedded into the recess 21. Furthermore, in Figure 6 In the image, the arrow indicates the insertion direction (embedding direction) when the protrusion 11 is embedded into the recess 21.

[0081] With the protrusion 11 and recess 21 engaged, the first structure 10 and the second structure 20 have contact portions in addition to the protrusion 11 and recess 21. In this embodiment, with the protrusion 11 and recess 21 engaged, the first structure 10 and the second structure 20 have portions that are in mutual surface contact. Specifically, as... Figure 5 and Figure 6 As shown, with the protrusion 11 and the recess 21 embedded and the first structure 10 and the second structure 20 connected, the main surface 12 of the first structure 10 and the main surface 22 of the second structure 20 are in surface contact. According to this structure, when the first structure 10 and the second structure 20 are connected, the first structure 10 and the second structure 20 are in close contact, and the gap between the first structure 10 and the second structure 20 is uniform or nearly uniform. Thus, a connection structure 1 with a simple and aesthetically pleasing appearance can be achieved for the connected first structure 10 and the second structure 20.

[0082] In the connecting structure 1, at least one of the protrusion 11 (first embedding portion) and the recess 21 (second embedding portion) is an anisotropic elastic structure having a periodic structure and elasticity that varies depending on the direction. In this embodiment, both the protrusion 11 and the recess 21 are anisotropic elastic structures. That is, both the protrusion 11 and the recess 21 have a periodic structure and elasticity that varies depending on the direction. Furthermore, the fact that the recess 21 is an anisotropic elastic structure means that the peripheral structure of the recess 21 is an anisotropic elastic structure.

[0083] The protrusions 11 and 21, which are anisotropic elastic structures, are one-dimensional periodic structures composed of multiple layers having a one-dimensional periodic structure as the periodic structure, and are made of a single material. Therefore, the protrusions 11 and 21 have a repeating structure that is periodically repeated only in one direction. In this embodiment, the protrusions 11 and 21 are formed by a 3D resin printer, having a periodic structure that repeats multiple resin layers periodically by stacking multiple resin layers. The one-dimensional periodic structure formed by the 3D resin printer is a monolithic object in which the interfaces between the resin layers are integrated without being bonded by an adhesive.

[0084] Furthermore, by forming the protrusion 11 and the recess 21 using a 3D resin printer, as described above, it is possible to form the protrusion 11 and the recess 21 with different elasticities in the resin lamination direction and in a direction orthogonal to the lamination direction. That is, the protrusion 11 and the recess 21 are each manufactured under the conditions of a 3D resin printer that allows them to have different elasticities in the resin lamination direction and in a direction orthogonal to the lamination direction.

[0085] Specifically, such as Figure 6 As shown, if the embedding direction of the protrusion 11 and the recess 21 when they are interlocked is taken as the first direction, and the direction orthogonal to the first direction is taken as the second direction, then the elasticity of the protrusion 11 and the recess 21, which are anisotropic elastic structures, in the second direction is greater than the elasticity of the protrusion 11 and the recess 21, which are anisotropic elastic structures, in the first direction. That is, the elasticity of the protrusion 11 and the recess 21, which are anisotropic elastic structures, in the direction orthogonal to the embedding direction is greater than the elasticity in the embedding direction. Specifically, the elastic modulus of the protrusion 11 and the recess 21 in the direction orthogonal to the embedding direction is smaller than the elastic modulus in the embedding direction. Therefore, the protrusion 11 and the recess 21 become structures that are easily deformable in the direction orthogonal to the embedding direction and not easily deformable in the embedding direction.

[0086] Furthermore, in this embodiment, not only are the protrusions 11 and the recesses 21 anisotropic elastic structures, but the entirety of both the first structure 10 and the second structure 20 is anisotropic elastic structure. Therefore, the entirety of the first structure 10 and the entirety of the second structure 20 are shaped by a 3D resin printer and have a periodic structure with multiple resin layers repeating periodically. Thus, the entirety of the first structure 10 and the entirety of the second structure 20 are, for example, constructed using an ultraviolet-curable resin such as acrylic resin.

[0087] In addition, Figure 5 and Figure 6 In the diagram, the shaded lines of the first structure 10 and the second structure 20 are lines that indicate the boundary lines of the resin layers to facilitate understanding of the stacking direction of the resin layers. They are not lines that can actually be seen. In addition, the number of boundary lines is not an accurate number.

[0088] Thus, in the connecting structure 1 of this embodiment, the protrusion 11 and the recess 21 are easily deformable in the direction orthogonal to the insertion direction (first direction) (second direction), but not easily deformable in the insertion direction (first direction). Therefore, when the protrusion 11 is inserted into the recess 21 to connect the first structure 10 and the second structure 20, the protrusion 11 and the recess 21 are easily elastically deformable in the direction orthogonal to the insertion direction (second direction) when the protrusion 11 is inserted into the recess 21. As a result, the protrusion 11 can be easily inserted into the recess 21, which is the insertion destination. That is, the first structure 10 and the second structure 20 can be easily connected.

[0089] Furthermore, with the protrusion 11 and the recess 21 inserted and the first structure 10 and the second structure 20 connected, when the protrusion 11 is removed from the recess 21, the protrusion 11 and the recess 21 easily deform elastically in a direction orthogonal to the insertion direction, thus allowing the protrusion 11 to be easily removed from the recess 21. That is, the first structure 10 and the second structure 20 can be easily separated.

[0090] Furthermore, after the protrusion 11 is inserted into the recess 21, the deformed protrusion 11 functions by applying pressure to the recess 21 while maintaining its original shape through elasticity (elastic restoring force), thus increasing the frictional resistance between the protrusion 11 and the recess 21. Therefore, with the protrusion 11 and the recess 21 inserted and the first structure 10 and the second structure 20 connected, the protrusion 11 remains in the recess 21 unless intentionally removed, and it is not easily dislodged from the recess 21.

[0091] Thus, the connecting structure 1 according to this embodiment has excellent loading and unloading performance and excellent retention performance. That is, it is possible to obtain a connecting structure 1 that can achieve both loading and unloading performance and retention performance.

[0092] Here, since an experiment was conducted to determine the effect of the connecting structure 1 of this embodiment, the results of the experiment will be explained below.

[0093] In this experiment, for the connecting structure of Embodiment 1 and the connecting structures of Comparative Examples 1 to 4, a first structure with a protrusion and a second structure with a recess were respectively manufactured, and the loading and unloading performance and retention performance of each connecting structure were evaluated.

[0094] Figure 8 This diagram shows the structure of the connecting structure in Embodiment 1 and the connecting structures in Comparative Examples 1-4, and presents the evaluation results of the loading / unloading performance and retention performance of each connecting structure. In this experiment, for each of Comparative Examples 1-4 and this embodiment, the diameter of the protrusion was made greater than or equal to the diameter of the recess, and the loading / unloading performance and retention performance when the protrusion was inserted into the recess were evaluated. Furthermore, Figure 8 The arrow indicates the insertion direction.

[0095] In Comparative Examples 1 and 2, the first structure with a protrusion and the second structure with a concave portion of the connecting structure are both made of the same material. Furthermore, the connecting structure exhibits isotropic elasticity. In addition, in the connecting structure of Comparative Example 1, the protrusion and concave portion are prisms, while in the connecting structure of Comparative Example 2, the protrusion and concave portion are frustums of square pyramids.

[0096] Both the first structure with a protrusion and the second structure with a concave portion in the connecting structures of Comparative Examples 3 and 4 have isotropic elasticity, but the protrusion is made of a soft material. In addition, in the connecting structure of Comparative Example 3, the protrusion and concave portion are prisms, and in the connecting structure of Comparative Example 4, the protrusion and concave portion are frustums of square pyramids.

[0097] In this embodiment, the first structure with a protrusion and the second structure with a concave portion of the connecting structure are both made of the same material, and as described above, they have anisotropic elasticity.

[0098] In addition, in each connecting structure, the retention performance is measured by the "retention force (N / m)". 2 ) = Elastic modulus (N / m 2 The evaluation is based on the formula "( ) × deformation amount". In this formula, the elastic modulus is the elastic modulus of the protrusion, and the deformation amount is the displacement of the protrusion in a direction orthogonal to the insertion direction. Furthermore, the elastic modulus of the protrusion is 10 in Comparative Examples 1 and 2 and in this embodiment. 9 In Comparative Examples 3 and 4, where the protrusions are made of a soft material, the value is 10. 7 .

[0099] In this experiment, for each of the prepared connecting structures, the ease of insertion when inserting the protrusion into the recess, the ease of detachment when removing the protrusion from the recess, and the holding force when the protrusion and recess are connected were evaluated.

[0100] As a result, in the connecting structure of Comparative Example 1, the protrusion and concave portion are not easily deformed, and the protrusion deforms isotropically, making it difficult for the protrusion to enter the concave portion and press into the bottom of the protrusion and concave portion. In addition, in the connecting structure of Comparative Example 1, the holding force is too strong, and once the protrusion is inserted into the concave portion, it is difficult to dislodge the protrusion from the concave portion.

[0101] In the connecting structure of Comparative Example 2, since the protrusion and concave portion have conical surfaces, it is easy to position the protrusion and concave portion and concentrate the force. Therefore, compared with Comparative Example 1, although it is easier for the protrusion to enter the concave portion, it cannot be said that it is easy to enter. On the other hand, since the deformation of the protrusion is slightly smaller than that of Comparative Example 1, a moderate holding force is obtained. In addition, since the protrusion and concave portion have conical surfaces, when removing the protrusion from the concave portion, the vector of the holding force changes from the removal direction to the detachment direction, making it easier to remove than in Comparative Example 1.

[0102] In the connecting structure of Comparative Example 3, the protrusion becomes softer, but since the deformation of the protrusion is isotropic, it also deforms in the insertion direction. As a result, it becomes more difficult to fit the protrusion into the recess, making it slightly difficult for the protrusion to enter the recess. Furthermore, because the protrusion becomes softer, its elastic modulus decreases, resulting in a weaker holding force. Additionally, with the weakened holding force, the protrusion easily detaches from the recess.

[0103] In the connecting structure of Comparative Example 4, the convex portion becomes flexible, and both the convex and concave portions have conical surfaces. Therefore, compared to Comparative Example 3, it is easier to position the convex and concave portions and concentrate forces, making it easier for the convex portion to enter the concave portion. Furthermore, because the convex portion becomes flexible, its elastic modulus decreases, resulting in a further reduction in the amount of deformation compared to Comparative Example 3. Consequently, the holding force is quite weak. Therefore, if the connecting structure of Comparative Example 4 is used outside the ground, the first or second structure may fall due to the need to overcome gravity. Additionally, the weakened holding force makes it easier for the convex portion to detach from the concave portion.

[0104] Furthermore, in the connecting structure of this embodiment, the elasticity of the protrusion 11 and the recess 21 in the direction orthogonal to the insertion direction is greater than that in the insertion direction. That is, the elastic modulus of the protrusion 11 and the recess 21 in the direction orthogonal to the insertion direction is smaller than that in the insertion direction. Therefore, in the insertion direction, since the protrusion 11 and the recess 21 are harder, it is easier to fit the protrusion 11 and the recess 21 together, and the protrusion 11 and the recess 21 undergo dominant elastic deformation in the direction orthogonal to the insertion direction. As a result, it is easier to insert the protrusion 11 into the recess 21.

[0105] Furthermore, in the connecting structure of this embodiment, since the protrusion 11 is inserted into the recess 21 under anisotropic deformation, a connecting structure with a higher elastic modulus than conventional ones can be used, thus improving the holding force. In other words, the connecting structure of this embodiment can be designed with high holding force.

[0106] Furthermore, in the connecting structure of this embodiment, since the protrusion 11 and the recess 21 have elastic anisotropy, when the protrusion 11 is removed from the recess 21, the protrusion 11 and the recess 21 undergo dominant elastic deformation in a direction orthogonal to the removal direction (the same direction as the insertion direction). Therefore, the protrusion can be easily removed from the recess.

[0107] As described above, the connecting structure 1 of this embodiment includes a first structure 10 and a second structure 20 detachably connected to the first structure 10. At least one of the protrusion 11 (first embedding portion) of the first structure 10 and the recess 21 (second embedding portion) of the second structure 20 is an anisotropic elastic structure having a periodic structure and having elasticity that varies depending on the direction. The elasticity of the anisotropic elastic structure in the direction orthogonal to the embedding direction (the second direction) is greater than the elasticity of the protrusion 11 and the recess 21 in the embedding direction (the first direction).

[0108] Therefore, at least one of the protrusion 11 and the recess 21 is easily deformable in the direction orthogonal to the embedding direction (the second direction), but not easily deformable in the embedding direction (the first direction). This allows for easy assembly and disassembly of the first structure 10 and the second structure 20, and enables the connected first structure 10 and second structure 20 to be held in place with a high holding force. Thus, a connecting structure 1 that balances assembly / disassembly performance with retention performance in the connected state can be realized.

[0109] Furthermore, in the connecting structure 1 of this embodiment, both the protrusion 11 and the recess 21 are anisotropic elastic structures. That is, the elasticity of the protrusion 11 and the recess 21 in the direction orthogonal to the embedding direction (the second direction) is greater than the elasticity of the protrusion 11 and the recess 21 in the embedding direction (the first direction).

[0110] Therefore, both the protrusion 11 and the recess 21 are easily deformable in the direction orthogonal to the embedding direction (the second direction), but not easily deformable in the embedding direction (the first direction). This makes it easier to assemble and disassemble the first structure 10 and the second structure 20, and allows for a higher holding force to hold the connected first structure 10 and second structure 20 together. Thus, it is possible to further achieve a balance between assembly / disassembly performance and retention performance in the connected state.

[0111] Alternatively, if only one of the protrusion 11 and the recess 21 is used as an anisotropic elastic structure, the recess 21 of the inserting side may not be used as an anisotropic elastic structure, but the protrusion 11 of the inserting side may be used as an anisotropic elastic structure.

[0112] According to this structure, compared to the case where the recess 21 of the inserting side is an anisotropic elastic structure, the protrusion 11, which is an anisotropic elastic structure, is easily deformable in the direction orthogonal to the insertion direction (the second direction) and not easily deformable in the insertion direction (the first direction). Therefore, compared to the case where the recess 21 of the inserting side is an anisotropic elastic structure, the first structure 10 and the second structure 20 can be easily installed and removed, and the connected first structure 10 and second structure 20 can be held with a high holding force.

[0113] Furthermore, in the connecting structure 1 of this embodiment, the anisotropic elastic structure constituting at least one of the protrusion 11 and the recess 21 is a multilayer body having a one-dimensional periodic structure as the periodic structure, and is made of a single material.

[0114] Such anisotropic elastic structures, which are one-dimensional periodic structures, can be easily fabricated using a 3D resin printer. That is, anisotropic elastic structures, namely protrusions 11 and / or recesses 21, that have anisotropic elasticity in the resin stacking direction and in the direction orthogonal to it can be easily fabricated using a 3D resin printer.

[0115] Furthermore, in the connecting structure 1 of this embodiment, the first structure 10 has a plurality of protrusions 11. Similarly, the second structure 20 also has a plurality of recesses 21.

[0116] With this structure, the number of insertion points for the protrusions 11 and the recesses 21 increases, thus reducing the likelihood of the first structure 10 accidentally detaching from the second structure 20. In other words, it improves the retention performance of the connecting structure 1.

[0117] On the other hand, the first structure 10 may have only one protrusion 11. Similarly, the second structure 20 may have only one recess 21.

[0118] According to this structure, since the insertion portion of the protrusion 11 and the recess 21 is only a minimum, the insertion operation of the protrusion 11 and the recess 21 becomes easy.

[0119] Furthermore, when there is one protrusion 11 in the first structure 10 and one recess 21 in the second structure 20 (that is, when there is only one connecting part between the first structure 10 and the second structure 20), after connecting the first structure 10 and the second structure 20 by inserting the protrusion 11 into the recess 21, the connecting structure 1 can be configured such that the first structure 10 rotates about the center (insertion center) of the insertion part of the protrusion 11 and the recess 21.

[0120] According to this structure, even after connecting the first structure 10 and the second structure 20, the first structure 10 can be easily aligned with respect to the direction of rotation because the first structure 10 and the second structure 20 rotate horizontally. Furthermore, in order for the first structure 10 to rotate while the protrusion 11 is inserted into the recess 21, the protrusion 11 and the recess 21 can be spherical or cylindrical.

[0121] Furthermore, when the first structure 10 rotates, a rotation prevention mechanism (stop) that prevents the horizontal rotation of the first structure 10 can be provided on at least one of the first structure 10 and the second structure 20. As a rotation prevention mechanism, a magnetic stop consisting of a pair of magnets or a mechanical stop using a guide rail or protrusion are considered.

[0122] According to this structure, since the continued rotation of the first structure 10 can be stopped, the shaking of the first structure 10 can be suppressed after it is connected to the second structure 20. In addition, by providing a rotation prevention mechanism, the positions of the first structure 10 and the second structure 20 can be easily aligned.

[0123] On the other hand, when there is only one protrusion 11 in the first structure 10 and one recess 21 in the second structure 20, after the first structure 10 and the second structure 20 are connected by inserting the protrusion 11 into the recess 21, the first structure 10 cannot rotate about the center (insertion center) of the insertion part of the protrusion 11 and the recess 21.

[0124] According to this structure, after the first structure 10 and the second structure 20 are connected, the first structure 10 does not rotate horizontally. Therefore, even though there is only one embedded part, the shaking after the first structure 10 is connected can be suppressed.

[0125] Furthermore, in the connecting structure 1 of this embodiment, the thickness of the first structure 10 in the embedding direction is 0.1 mm or more and less than 3.0 cm.

[0126] According to this structure, since the first structure 10 can be made thinner, a connecting structure 1 that can ensure a wide space can be realized.

[0127] In this case, further, with the first structure 10 and the second structure 20 connected, the thickness of the connecting structure 1 in the embedding direction can be more than 0.5 cm and less than 10 cm.

[0128] According to this structure, even when the first structure 10 and the second structure 20 are connected, the total thickness of the connecting structure 1 can be reduced, thus enabling the connecting structure 1 to ensure a spacious environment.

[0129] Furthermore, the connecting structure 1 of this embodiment has excellent loading and unloading performance and retention performance, so it can be used as a building material suitable for renovation. In this case, the connecting structure 1 is not limited to floor materials, but can also be used for building materials affected by gravity, such as wall materials (inner wall materials, outer wall materials) or ceilings.

[0130] Furthermore, in the connecting structure 1 of this embodiment, since one of the first structure 10 and the second structure 20 can be easily installed on the other or easily removed from the other, the connecting structure 1 can be easily repaired or refurbished.

[0131] Furthermore, since one of the first structure 10 and the second structure 20 in the connecting structure 1 can be easily installed on or easily removed from the other, the present invention can also be implemented as a decorative method that uses or reuses the connecting structure 1 for decoration. For example, by using the connecting structure 1 as a building material for a shop window or display case, simply removing the front-side component of the first structure 10 and the second structure 20 from the back-side component allows for easy replacement of only the front-side component of the first structure 10 and the second structure 20. This allows for simple decoration such as pattern replacement.

[0132] Furthermore, in the connecting structure 1 of this embodiment, since one of the first structure 10 and the second structure 20 can be easily installed on the other or easily removed from the other, automation or reduction of working hours can be achieved by using robots or the like, thus enabling a decoration method that can eliminate manpower shortages.

[0133] Furthermore, the installation or removal of the first structure 10 and the second structure 20 does not require adhesives, therefore, the first structure 10 and / or the second structure 20 can be easily recycled or reused. This enables a decoration method that is environmentally friendly and has a low environmental impact.

[0134] In this case, renovation can be carried out using the connecting structure 1. That is, the renovation method of the present invention can also be implemented as a renovation method for residences or the like that use the connecting structure 1.

[0135] This enables renovation methods that facilitate automation or reduce working hours, eliminate labor shortages, and are environmentally friendly. Consequently, it allows for a comprehensive approach to address recent social issues related to housing, the challenges of a declining and aging society, work style reforms, and environmental considerations.

[0136] In addition, the above-described decoration method can also be applied to the following implementation methods.

[0137] (Implementation Method 2)

[0138] Next, use Figure 9 The connecting structure 1B of Embodiment 2 will be described. Figure 9 This is a cross-sectional view showing the situation where the first structure 10B and the second structure 20B are connected in the connecting structure 1B of Embodiment 2.

[0139] In the connecting structure 1 of the above-described embodiment 1, the first structure 10 and the second structure 20 are each composed of only one component, but as Figure 9 As shown, in the connecting structure 1B of this embodiment, the first structure 10B and the second structure 20B are each composed of multiple components. Specifically, the first structure 10B has a first main body layer 10a and a first connecting layer 10b stacked on the first main body layer 10a, and the second structure 20B has a second main body layer 20a and a second connecting layer 20b stacked on the second main body layer 20a.

[0140] The first main body layer 10a is, for example, a substrate supporting the first connecting layer 10b. Similarly, the second main body layer 20a is, for example, a substrate supporting the second connecting layer 20b. The first main body layer 10a and the second main body layer 20a may be rigid. In addition, the first main body layer 10a and the second main body layer 20a are formed using flexible raw materials and shapes.

[0141] One or both of the first main layer 10a and the second main layer 20a can be functional layers. As functional layers, sound-insulating sheets, waterproof sheets, stain-resistant sheets, fire-resistant sheets, or sensor sheets with various sensors can be used.

[0142] Furthermore, when only one of the first main body layer 10a and the second main body layer 20a is a functional layer, either the first structure 10B or the second structure 20B can be the outer side (surface side). For example, when only the first main body layer 10a of the first structure 10B is a functional layer, a connecting structure 1B can be used such that the first structure 10B is located on the inner side (back side) and the second structure 20B is located on the outer side (surface side), or a connecting structure 1B can be used such that the first structure 10B is located on the outer side and the second structure 20B is located on the inner side.

[0143] Furthermore, one or both of the first main layer 10a and the second main layer 20a can be aesthetically pleasing layers. As aesthetic layers, they can be designed sheets with wood grain styles or patterns, colors, or designs.

[0144] Furthermore, if only one of the first main body layer 10a and the second main body layer 20a is an aesthetic layer, the one with the aesthetic layer in the first structure 10B and the second structure 20B can be the outer side (surface side). For example, if only the first main body layer 10a of the first structure 10B is an aesthetic layer, a connecting structure 1B can be used such that the first structure 10B is located on the outer side (surface side) and the second structure 20B is located on the inner side (back side).

[0145] Alternatively, one of the first main body layer 10a and the second main body layer 20a can be a functional layer, and the other of the first main body layer 10a and the second main body layer 20a can be an aesthetic layer. In this case, when the connecting structure 1B is used as a building material, the connecting structure 1B can be used such that the one of the first structure 10B and the second structure 20B with the functional layer is the inner side (back side), and the one of the first structure 10B and the second structure 20B with the aesthetic layer is the outer side (surface side).

[0146] In addition, the first main layer 10a and the second main layer 20a can also be used as functional layers and aesthetic layers.

[0147] Furthermore, the first main body layer 10a may not be a functional layer or an aesthetic layer, but rather a support layer supporting the first connecting layer 10b. Similarly, the second main body layer 20a may not be a functional layer or an aesthetic layer, but rather a support layer supporting the second connecting layer 20b. As a support layer, a rigid substrate can be used. Moreover, even when the first main body layer 10a and the second main body layer 20a are support layers, the first main body layer 10a and the second main body layer 20a may also serve as functional layers or aesthetic layers.

[0148] The substrates of the first main layer 10a and the second main layer 20a thus constructed are not anisotropic elastic structures, but rather isotropic elastic structures, for example. For example, the substrates constituting the first main layer 10a and the second main layer 20a may be made of resin, metal, or wood, but are not limited to these. Furthermore, one or both of the substrates constituting the first main layer 10a and the second main layer 20a may also be anisotropic elastic structures formed by a 3D printer or similar means.

[0149] The first connecting layer 10b of the first structure 10B is the portion of the first structure 10B that connects to the second connecting layer 20b of the second structure 20B. One or more protrusions 11 are provided on the first connecting layer 10b as a first embedded portion.

[0150] The second connecting layer 20b of the second structure 20B is the portion of the second structure 20B that is connected to the first connecting layer 10b of the first structure 10B. One or more recesses 21 are provided on the second connecting layer 20b as a second embedding portion.

[0151] The first connecting layer 10b and the second connecting layer 20b are anisotropic elastic structures with anisotropic elasticity. For example, the first connecting layer 10b and the second connecting layer 20b are one-dimensional periodic structures having a repeating structure that is periodically repeated only in one direction, formed by a 3D resin printer. In this case, the first connecting layer 10b and the second connecting layer 20b have a periodic structure in which multiple resin layers are periodically repeated by stacking multiple resin layers. Thus, by forming the first connecting layer 10b and the second connecting layer 20b by a 3D resin printer, as described above, it is possible to form the first connecting layer 10b and the second connecting layer 20b with different elasticities in the resin stacking direction and in a direction orthogonal to the stacking direction. Furthermore, the elasticity of the first connecting layer 10b and the second connecting layer 20b, which are anisotropic elastic structures, in the direction orthogonal to the embedding direction (the second direction) is greater than the elasticity of the protrusion 11 and the recess 21 in the embedding direction (the first direction).

[0152] Thus, the connecting structure 1B of this embodiment includes: a first structure 10B having a first connecting layer 10b with a protrusion 11 (first embedding portion); and a second structure 20B having a second connecting layer 20b with a recess 21 (second embedding portion). The first connecting layer 10b and the second connecting layer 20b are anisotropic elastic structures having a periodic structure and different elasticity depending on the direction. Moreover, the elasticity of the first connecting layer 10b and the second connecting layer 20b, as anisotropic elastic structures, in the direction orthogonal to the embedding direction (second direction) is greater than the elasticity of the protrusion 11 and the recess 21 in the embedding direction (first direction).

[0153] Therefore, the protrusion 11 of the first structure 10B and the recess 21 of the second structure 20B are easily deformable in the direction orthogonal to the insertion direction (the second direction), but not easily deformable in the insertion direction (the first direction). This allows for easy assembly and disassembly of the first structure 10B and the second structure 20B, and enables the connected first structure 10B and second structure 20B to be held in place with a high holding force. Thus, a connecting structure 1B that balances assembly / disassembly performance with retention performance in the connected state can be achieved.

[0154] Alternatively, either the first connecting layer 10b or the second connecting layer 20b may be an anisotropic elastic structure. In this case, the first connecting layer 10b having the insertion-side protrusion 11 may be an anisotropic elastic structure.

[0155] In addition, such as Figure 10 As shown in the connecting structure 1B', the protrusion 11 of the first structure 10B' can also be the first connecting layer 10b' itself, which is an anisotropic elastic structure. That is, the main surface 12 of the first structure 10B' can be the main surface of the first main body layer 10a, and the protrusion 11, which is an anisotropic elastic structure, is provided on the main surface of the first main body layer 10a. In this way, in the first structure 10B', only the protrusion 11 can be an anisotropic elastic structure. The connecting structure 10B' with such a structure is particularly useful as an infra-connectors. By using the first connecting structure 10B' as a detachable connector in the building material, simple engineering for non-residential buildings can be achieved.

[0156] (Implementation Method 3)

[0157] Next, use Figure 11 The connecting structure 1C of Embodiment 3 will be described. Figure 11 This is a cross-sectional view showing the connection structure 1C in Embodiment 3, in which the first structure 10C, the second structure 20C, and the third structure 30C are connected.

[0158] The connecting structure 1 in Embodiment 1 described above consists of two structures: a first structure 10 and a second structure 20. The connecting structure 1C in this embodiment consists of three structures: a first structure 10C, a second structure 20C, and a third structure 30C. That is, the connecting structure 1C in this embodiment is a structure in which the first structure 10C, the second structure 20C, and the third structure 30C are detachably connected.

[0159] Specifically, in this embodiment, the connecting structure 1C is a structure in which a first structure 10C is sandwiched between a second structure 20C and a third structure 30C. Furthermore, the first structure 10C and the second structure 20C are detachably connected, and the first structure 10C and the third structure 30C are also detachably connected. That is, the first structure 10C, located between the second structure 20C and the third structure 30C, is detachable from both the second structure 20C and the third structure 30C.

[0160] Therefore, the first structure 10C not only has a first insert portion, but also has at least one recess 13 as a third insert portion. In this embodiment, the first structure 10C has multiple recesses 13. The multiple recesses 13 have the same shape.

[0161] The plurality of recesses 13 are bottomed holes formed by recesses in the main surface 14 opposite to the main surface 12 of the first structure 10C. In this embodiment, the recesses 13 have the same shape and size as the recesses 21 of the second structure 20C.

[0162] In addition, as described above, the connecting structure 1C includes a third structure 30C in addition to the first structure 10C and the second structure 20C.

[0163] The third structure 30C has at least one protrusion 31 as a fourth insert portion that is detachably fitted into the recess 13 (third insert portion) of the first structure 10C. In this embodiment, the third structure 30C has a plurality of protrusions 31. The plurality of protrusions 31 have the same shape.

[0164] The plurality of protrusions 31 are protrusions formed by projecting out from the main surface 32 of the third structure 30C. In this embodiment, the protrusions 31 have the same shape and size as the protrusions 11 of the first structure 10C.

[0165] The third structure 30C can be formed from flexible raw materials and shapes. This improves the ease of assembly and disassembly between the third structure 30C and the first structure 10C. For example, the third structure 30C can be a flexible sheet. As an example, the thickness of the third structure 30C is 0.1 mm or more and less than 3.0 cm.

[0166] Furthermore, the third structure 30C can be a rigid body. Moreover, the third structure 30C can be a support for the first structure 10C. Therefore, even if external forces or other stresses are applied to the connecting structure 1C, deformation of the connecting structure 1C can be suppressed. Thus, a connecting structure 1C that is not easily deformed by stress can be achieved.

[0167] Furthermore, in the connecting structure 1C of this embodiment, the first structure 10C, the second structure 20C, and the third structure 30C are each composed of multiple components.

[0168] Specifically, the first structure 10C has a first main body layer 10a, a first connecting layer 10b stacked on one side of the first main body layer 10a, and a third connecting layer 10c stacked on the other side of the first main body layer 10a.

[0169] The second structure 20C is similar to the second structure 20B in Embodiment 2 described above, having a second main body layer 20a and a second connecting layer 20b stacked on the second main body layer 20a. Specifically, the second connecting layer 20b is stacked on the surface of the second main body layer 20a on the side of the first structure 10C.

[0170] The third structure 30C has a third main body layer 30a and a fourth connecting layer 30b stacked on the third main body layer 30a. Specifically, the fourth connecting layer 30b is stacked on the surface of the first structure 10C side of the third main body layer 30a.

[0171] The third main layer 30a is a substrate that supports the fourth connecting layer 30b. In this case, the third main layer 30a is a rigid sheet. The third main layer 30a is formed from a flexible raw material and shape.

[0172] The substrate constituting the third main layer 30a, like the first main layer 10a and the second main layer 20a, is not an anisotropic elastic structure, but rather an isotropic elastic structure. For example, it is an isotropic elastic structure. As an example, the substrate constituting the third main layer 30a may be made of resin, metal, or wood, but is not limited to these. Alternatively, the substrate constituting the third main layer 30a may also be an anisotropic elastic structure formed by a 3D printer or similar means.

[0173] In addition, the third main layer 30a, like the first main layer 10a and the second main layer 20a, can be a functional layer, an aesthetic layer, or a layer that serves as both a functional and aesthetic layer.

[0174] In this embodiment, the connecting structure 1C is a building material arranged with the second structure 20C as the outermost (surface) side. In this case, for example, the outermost second structure 20C could be an aesthetic layer such as wood grain sheet, the innermost third structure 30C could be a support, and the central first structure 10C could be a functional layer. Furthermore, the combination of functional and aesthetic layers in the first structure 10C, second structure 20C, and third structure 30C is not limited to this.

[0175] The first connecting layer 10b of the first structure 10C is the same as that in Embodiment 2 described above, and is the portion of the first structure 10C that connects to the second connecting layer 20b of the second structure 20C. One or more protrusions 11 are provided on the first connecting layer 10b as a first embedded portion.

[0176] Furthermore, the third connecting layer 10c of the first structure 10C is the portion of the first structure 10C that is connected to the fourth connecting layer 30b of the third structure 30C. One or more recesses 13 are provided on the third connecting layer 10c as a third embedding portion.

[0177] The second connecting layer 20b of the second structure 20C is the same as that in Embodiment 2 described above, and is the portion in the second structure 20C that connects to the first connecting layer 10b in the first structure 10C. One or more recesses 21 are provided on the second connecting layer 20b as a second embedding portion.

[0178] The fourth connecting layer 30b of the third structure 30C is the portion in the third structure 30C that connects to the third connecting layer 10c in the first structure 10C. One or more protrusions 31 are provided on the second connecting layer 20b as a fourth embedded portion.

[0179] The first connecting layer 10b, the second connecting layer 20b, the third connecting layer 10c, and the fourth connecting layer 30b are anisotropic elastic structures with anisotropic elasticity. For example, the first connecting layer 10b and the second connecting layer 20b are one-dimensional periodic structures with a repeating structure that is periodically repeated only in one direction, formed by a 3D resin printer. In this case, the first connecting layer 10b, the second connecting layer 20b, the third connecting layer 10c, and the fourth connecting layer 30b have a periodic structure in which multiple resin layers are periodically repeated by stacking multiple resin layers. Thus, by forming the first connecting layer 10b, the second connecting layer 20b, the third connecting layer 10c, and the fourth connecting layer 30b using a 3D resin printer, as described above, it is possible to form the first connecting layer 10b, the second connecting layer 20b, the third connecting layer 10c, and the fourth connecting layer 30b with different elasticities in the resin stacking direction and in the direction orthogonal to the stacking direction. Moreover, the elasticity of the first connecting layer 10b, the second connecting layer 20b, the third connecting layer 10c, and the fourth connecting layer 30b, which are anisotropic elastic structures, in the direction orthogonal to the embedding direction (the second direction) is greater than the elasticity of the protrusion 11 and the recess 21 in the embedding direction (the first direction).

[0180] Thus, the connecting structure 1C of this embodiment includes: a first structure 10C having a first connecting layer 10b with a protrusion 11 (first embedding portion) and a third connecting layer 10c with a recess 13 (third embedding portion); a second structure 20C having a second connecting layer 20b with a recess 21 (second embedding portion); and a third structure 30C having a fourth connecting layer 30b with a protrusion 31 (fourth embedding portion). The first connecting layer 10b, the second connecting layer 20b, the third connecting layer 10c, and the fourth connecting layer 30b have a periodic structure and are anisotropic elastic structures with different elasticity depending on the direction. Furthermore, the elasticity of the first connecting layer 10b, the second connecting layer 20b, the third connecting layer 10c, and the fourth connecting layer 30b, which are anisotropic elastic structures, in the direction orthogonal to the embedding direction (the second direction) is greater than the elasticity of the protrusion 11 and the recess 21 in the embedding direction (the first direction).

[0181] Therefore, the protrusion 11 and recess 13 of the first structure 10C, the recess 21 of the second structure 20C, and the protrusion 31 of the third structure 30C are easily deformable in the direction orthogonal to the insertion direction (the second direction), but not easily deformable in the insertion direction (the first direction). This allows for easy assembly and disassembly of both the first and third structures 10C. Furthermore, a high holding force is required to hold both the connected first and second structures 10C and 30C together. Thus, a connecting structure 1C that balances assembly / disassembly performance with good retention of the connected state can be achieved.

[0182] (Modified Example)

[0183] The present invention has been described above based on the embodiments, but the present invention is not limited to the above embodiments 1 to 3.

[0184] For example, in embodiments 1 to 3 described above, the anisotropic elastic structure constituting the peripheral structure of the protrusion 11 and the recess 21 is made of resin material, but is not limited to this. Furthermore, in embodiments 1 to 3 described above, the anisotropic elastic structure constituting the peripheral structure of the protrusion 11 and the recess 21 is manufactured by a 3D printer, but is not limited to this. Specifically, the peripheral structure of the protrusion 11 and the recess 21 can be made of materials other than resin material, or can be manufactured by a device other than a 3D printer. The same applies to the recess 13 and the protrusion 31.

[0185] Furthermore, in the above embodiments 1 to 3, the anisotropic elastic structure constituting the peripheral structure of the protrusion 11 and the recess 21 is a multilayer body having a one-dimensional periodic structure as the periodic structure, and is made of a single material, but is not limited thereto.

[0186] For example, such as Figure 12 As shown, the anisotropic elastic structure constituting the protrusion 11D can be a multilayer body with a one-dimensional periodic structure as the periodic structure, and can be made of multiple types of materials.

[0187] Figure 12 The protrusion 11D is an anisotropic elastic structure composed of multiple materials with different elastic moduli. Specifically, the protrusion 11D has a periodic structure in which a first layer 11a and a second layer 11b are alternately stacked. The first layer 11a is composed of a first material with a high elastic modulus, i.e., a high elastic modulus material, and the second layer 11b is composed of a second material with a low elastic modulus, i.e., a low elastic modulus material. As an example, the high elastic modulus material constituting the first layer 11a is polycarbonate resin, and the low elastic modulus material constituting the second layer 11b is thermoplastic polyurethane resin.

[0188] In this way, by combining materials with different elastic moduli (i.e. different elasticities), the design of the anisotropy of elasticity in anisotropic elastic structures becomes easy, and the anisotropy of elasticity can be easily controlled according to the application.

[0189] Alternatively, when the protrusion 11 is made of multiple materials, it can also be an anisotropic elastic structure composed of a one-dimensional periodic structure containing both high elastic modulus and low elastic modulus materials in the entire protrusion 11.

[0190] For example, such as Figure 13 As shown in the diagram, the protrusion 11E can also be an anisotropic elastic structure consisting of alternating layers of a first layer 11x with a high proportion of high elastic modulus material and a second layer 11y with a high proportion of low elastic modulus material. Both the first layer 11x and the second layer 11y contain both high and low elastic modulus materials. The first layer 11x is a high elastic modulus material enrichment layer with a high content of high elastic modulus material, and the second layer 11y is a low elastic modulus material enrichment layer with a high content of low elastic modulus material. Furthermore, the boundary between the first layer 11x and the second layer 11y forms a continuous phase where the content of high and low elastic modulus materials gradually changes in a gradual manner. In other words, the protrusion 11E is an anisotropic elastic structure with a continuous phase at the layer boundary.

[0191] Alternatively, the protrusion having such a continuous phase can also be made of a single material. In this case, the protrusion having a continuous phase made of a single material can be a structure formed by repeatedly stacking multiple main layers whose elastic modulus does not change in the stacking direction, and it is an anisotropic elastic structure in which a continuous phase having an average elastic modulus different from that of the main layers is sandwiched between the main layers. That is, the protrusion can also be an anisotropic elastic structure in which multiple main layers and continuous layers are stacked alternately.

[0192] also, Figure 12 and Figure 13 The one-dimensional periodic structure shown is not limited to the case of the protrusion 11, but can also be applied to the peripheral structure of the concave portion 21. Furthermore, Figure 12 and Figure 13 The one-dimensional periodic structure shown can be applied not only to the peripheral structure of the protrusion 11 and the concave 21, but also to the peripheral structure of the concave 13 and the protrusion 31.

[0193] Furthermore, in the above embodiments 1 to 3, the anisotropic elastic structure constituting the peripheral structure of the protrusion 11 and the recess 21 is a one-dimensional periodic structure having a one-dimensional periodic structure as the periodic structure, but is not limited to this.

[0194] Specifically, the anisotropic elastic structure constituting the peripheral structure of the protrusion 11 and the recess 21 can also be a two-dimensional periodic structure having a two-dimensional periodic structure as its periodic structure. For example, such a two-dimensional periodic structure... Figure 14 As shown in the diagram, the anisotropic elastic structure constituting the protrusion 11F can also be a two-dimensional periodic structure formed by interlocking a first member 11m made of a high-elastic-modulus material and a second member 11n made of a low-elastic-modulus material. For example, the high-elastic-modulus material constituting the first member 11m is polycarbonate resin, and the low-elastic-modulus material constituting the second member 11n is thermoplastic polyurethane resin. This type of two-dimensional periodic structure can be manufactured using a 3D printer, but it can also be manufactured using methods such as material extrusion molding. Furthermore, Figure 14 The two-dimensional periodic structure shown can be applied not only to convex parts but also to the peripheral structures of concave parts.

[0195] Furthermore, although not illustrated, the anisotropic elastic structure constituting the peripheral structure of the convex and concave portions can also be a three-dimensional periodic structure with a three-dimensional periodic structure as its periodic structure, or a lattice structure with a periodically arranged lattice as its periodic structure. Such three-dimensional periodic structures and lattice structures can also be fabricated using a 3D printer. Additionally, when the anisotropic elastic structure constituting the peripheral structure of the convex and concave portions is a lattice structure, by varying the density of the lattice cells constituting the lattice structure, the elastic modulus can be varied according to the direction. That is, the elasticity can be varied according to the direction.

[0196] Furthermore, although not illustrated in embodiments 1 to 3 above, all of the plurality of protrusions 11 are of the same shape, but this is not a limitation. Specifically, the plurality of protrusions 11 may include two or more different shapes. For example, the plurality of protrusions 11 may include spherical protrusions and prism-shaped protrusions. The same applies to the plurality of recesses 13, the plurality of recesses 21, and the plurality of protrusions 31.

[0197] Furthermore, in Embodiment 1 described above, only a protrusion 11 (male structure) is provided as the first embedding part on the same surface of the first structure 10, and only a recess 21 (female structure) is provided as the second embedding part on the same surface of the second structure 20, but this is not a limitation. For example, both a protrusion and a recess may be provided as the first embedding part on the same surface of the first structure 10, and both a recess and a protrusion may be provided as the second embedding part on the same surface of the second structure 20. In this case, it can be configured such that the protrusion provided on the first structure 10 and the recess provided on the second structure 20 are detachably fitted together, and the recess provided on the first structure 10 and the protrusion provided on the second structure 20 are detachably fitted together. In this way, protrusions and recesses can coexist on the same surface of a single structure. In addition, the structure in which protrusions and recesses coexist on the same surface of a single structure can be applied not only to Embodiment 1 described above, but also to Embodiments 2 and 3 described above.

[0198] Furthermore, in embodiments 1 and 2 described above, the present invention is a connecting structure comprising a first structure and a second structure, but is not limited thereto. For example, the present invention may also be a connecting structure assembly comprising a first structure and a second structure. That is, the present invention can be applied not only to connecting structures in a connected state of the first structure and the second structure, but also to connecting structure assemblies including a separated state of the first structure and the second structure. Additionally, this can also be applied to embodiment 3 described above. That is, the present invention may also be a connecting structure assembly comprising a first structure, a second structure, and a third structure.

[0199] Furthermore, the present invention is not limited to the case of being composed of two structures as in Embodiments 1 and 2 above or three structures as in Embodiment 3 above. As long as they can be detachably connected to each other, it can also be a connecting structure or connecting structure assembly with four or more stacked structures.

[0200] Furthermore, while embodiments 1 to 3 described above illustrate the application of the connecting structure to building materials in the construction field, the invention is not limited thereto. The connecting structure of the present invention can also be applied to uses other than building materials.

[0201] In addition, the present invention also includes various modifications that can be conceived by those skilled in the art to the various embodiments and variations, and the implementation of the embodiments and variations by arbitrarily combining the constituent elements and functions of the various embodiments and variations without departing from the spirit of the present invention.

[0202] Explanation of reference numerals in the attached figures

[0203] 1. Connecting structures 1A, 1B, and 1C

[0204] Structure 10, 10A, 10B, 10C

[0205] 10b First Connection Layer

[0206] 11, 11A, 11D, 11E, 11F Protrusions (First Embedded Part)

[0207] 11a, 11x, first layer

[0208] 11b, 11y, second layer

[0209] 11m First Component

[0210] 11n second component

[0211] 12, 14, 22, 32 main side

[0212] 13 concave portion (3rd embedded portion)

[0213] Structure 20, 20A, 20B, 20C

[0214] 20b Second Connection Layer

[0215] 21, 21A Recess (Second Insertion Part)

[0216] 30C Third Structure

[0217] 31. Protrusion (4th Embedded Part)

Claims

1. A connecting structure, wherein, have: The first structure; and The second structure is detachably connected to the first structure as an integral part. The first structure has a first embedding portion. The second structure has a second embedding part that can be detachably fitted into the first embedding part. At least one of the first embedding portion and the second embedding portion is an anisotropic elastic structure having a periodic structure and different elasticity depending on the direction. When the embedding direction of the first embedding part and the second embedding part are embedded into each other is set as the first direction, and the direction orthogonal to the first direction is set as the second direction, the elasticity of the anisotropic elastic structure in the second direction is greater than the elasticity of the anisotropic elastic structure in the first direction.

2. The connecting structure according to claim 1, wherein, Both the first embedded part and the second embedded part are anisotropic elastic structures.

3. The connecting structure according to claim 1 or 2, wherein, The anisotropic elastic structure includes at least one selected from a multilayer having a one-dimensional periodic structure as the periodic structure, a two-dimensional periodic structure having a two-dimensional periodic structure as the periodic structure, a three-dimensional periodic structure having a three-dimensional periodic structure as the periodic structure, and a lattice structure having a periodically arranged lattice as the periodic structure.

4. The connecting structure according to claim 1 or 2, wherein, The anisotropic elastic structure is composed of multiple types of materials with different elastic moduli.

5. The connecting structure according to claim 1 or 2, wherein, The anisotropic elastic structure is a multilayer body with a one-dimensional periodic structure as the periodic structure, and is made of a single material.

6. The connecting structure according to claim 1 or 2, wherein, When the first embedding part and the second embedding part are embedded, the first structure and the second structure have portions that are in mutual surface contact.

7. The connecting structure according to claim 1 or 2, wherein, The first structure has a plurality of the first embedded portions.

8. The connecting structure according to claim 1 or 2, wherein, At least one of the first structure and the second structure is formed from a flexible raw material and shape.

9. The connecting structure according to claim 1 or 2, wherein, It also has a third structure. The first structure has a third embedded part. The third structure has a fourth insert that is detachably fitted into the third insert.

10. The connecting structure according to claim 9, wherein, The third structure is a support that supports the first structure.

11. The connecting structure according to claim 1 or 2, wherein, The first structure has: a functional layer; and a first connecting layer, which is stacked on the functional layer and has the first embedded portion.

12. The connecting structure according to claim 1 or 2, wherein, The second structure has: an aesthetic layer; and a second connecting layer, which is stacked on the aesthetic layer and has the second embedded portion.

13. The connecting structure according to claim 1 or 2, wherein, The thickness of the first structure in the first direction is greater than 0.1 mm and less than 3.0 cm.

14. The connecting structure according to claim 1 or 2, wherein, The connecting structure is a building material.

15. A method of decoration, wherein, Decoration is carried out by utilizing or reusing the connecting structure as described in any one of claims 1 to 14.

16. The decoration method according to claim 15, wherein, Renovation is carried out by utilizing the aforementioned connecting structures.

17. A connecting structure component, wherein, have: The first structure has a first embedding portion; and The second structure, independent of the first structure, has a second embedding portion that can be detachably fitted into the first embedding portion. The first structure and the second structure can be selectively connected by embedding the first embedding part and the second embedding part. At least one of the first embedding portion and the second embedding portion is an anisotropic elastic structure having a periodic structure and different elasticity depending on the direction. When the embedding direction of the first embedding part and the second embedding part are embedded into each other is set as the first direction, and the direction orthogonal to the first direction is set as the second direction, the elasticity of the anisotropic elastic structure in the second direction is greater than the elasticity of the anisotropic elastic structure in the first direction.

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