Three-dimensional framework structure

Abstract

To provide a three-dimensional framework structure excellent in productivity that can be formed without using a joining member such as an adhesive or a nail even if the three-dimensional framework structure has a three-dimensional shape having a curved surface.SOLUTION: Provided is a three-dimensional framework structure including a first framework piece and a second framework piece. The first framework piece forms a rectangular plate shape and has at least two engagement portions on one-side long side. The second framework piece forms a rectangular plate shape and has at least two engagement portions on each of both-side long sides. The second framework piece is soft with respect to the first framework piece.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a three-dimensional kumbling structure that forms a three-dimensional structure having curved surfaces. [Background technology]

[0002] Kumiko is a well-known traditional woodworking technique that allows for the creation of various geometric patterns by joining pieces of wood together without using nails.

[0003] Generally, kumiko is used to decorate openings in fittings and furniture frameworks, for example, in sliding doors, transoms, etc. However, in recent years, with changes in lifestyle, the demand for Japanese-style rooms in buildings has been decreasing, and there are fewer situations in which kumiko is used, raising concerns about the decline of the kumiko industry.

[0004] In response to such issues, as shown in Patent Document 1, a method has been known in the past to increase the number of situations in which kumiko can be used, not only by using kumiko to decorate part of a fitting, but also by combining multiple kumiko pieces to form spherical kumiko, which can be used in vases, lighting fixtures, etc. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4080184 Summary of the Invention [Problem to be solved by the invention]

[0006] The invention described in Patent Document 1 is an invention for a kumiko decoration formed into a sphere by successively combining several kinds of kumiko pieces, and the engaging parts where the kumiko pieces engage with each other are provided with engagement reliefs (room for the kumiko) that are formed in advance to a degree that prevents wobbling, and a curved surface is formed by utilizing these engagement reliefs. Also, in order to form the curved surface, the invention described in Patent Document 1 has a process in which the partially assembled kumiko is aligned with a jig and an adhesive is applied to each engaging part of the kumiko pieces to fix them in place.

[0007] As described above, the manufacturing process for conventional spherical kumiko ornaments includes a gluing process, which requires time for the adhesive to harden, and this poses problems in terms of productivity and efficiency. Also, because each kumiko piece is fixed with an adhesive, it is not possible to rearrange the kumiko pieces if they need to be rearranged.

[0008] Therefore, the present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a three-dimensional kumiko structure with excellent productivity that can be formed without using joining members such as adhesives or nails, even for structures with three-dimensional shapes and curved surfaces. [Means for solving the problem]

[0009] The present invention has been made to achieve the above object and has the following features.

[0010] The three-dimensional kumiko structure of the present invention is a three-dimensional kumiko structure comprising a first kumiko piece and a second kumiko piece, wherein the first kumiko piece is a rectangular plate having at least two engaging portions on one long side, and the second kumiko piece is a rectangular plate having at least two engaging portions on each of both long sides, and the second kumiko piece is softer than the first kumiko piece.

[0011] In the three-dimensional kumiko structure of the present invention, it is preferable that the first kumiko piece and the second kumiko piece engage with each other to form a hexagonal kumiko, and that the hexagonal kumiko is arranged in a continuous plane.

[0012] In the three-dimensional kumiko structure according to the present invention, it is preferable that the second kumiko pieces form at least one pair of opposing sides of the hexagonal kumiko.

[0013] In the three-dimensional kumbling structure according to the present invention, it is preferable that the second kumbling piece is made of an elastic material.

[0014] In the three-dimensional braided structure according to the present invention, it is preferable that the elastic material is a thermoplastic polyurethane elastomer.

[0015] In the three-dimensional kumiko structure of the present invention, it is preferable that a third kumiko piece is provided, the third kumiko piece being in the form of an arc-shaped plate, having at least two engaging portions on each of both long sides, and being softer than the first kumiko piece.

[0016] In the three-dimensional kumiko structure of the present invention, it is preferable that a fourth kumiko piece is provided, the fourth kumiko piece having a plurality of rectangular plate-shaped portions and a connecting portion and being softer than the first kumiko piece, the rectangular plate-shaped portion having at least two engaging portions on each of both long sides, and the connecting portion connecting each of the rectangular plate-shaped portions at a distance from each other in the plate thickness direction.

[0017] The above summary of the invention does not list all of the features necessary for the present invention, and any subcombination of these features may also constitute an invention. Effect of the Invention

[0018] According to the present invention, even structures with three-dimensional shapes having curved surfaces can be formed without using joining materials such as adhesives, nails, etc. Furthermore, according to the present invention, kumiko pieces with excellent design properties and various shapes according to the purpose can be produced. [Brief description of the drawings]

[0019] [Figure 1] FIG. [Diagram 2] FIG. 2 is a perspective view showing a hexagonal muntin that constitutes the three-dimensional muntin structure of the present invention. [Diagram 3] 1A and 1B are drawings showing a first kumbling piece of the present invention, where (a) is a front view and (b) is a plan view. [Figure 4] 4A and 4B are drawings showing a second kumbling piece of the present invention, where (a) is a front view and (b) is a plan view. [Diagram 5]FIG. 2 is a perspective view of a first and second knot pieces of the present invention, in which (a) is a perspective view showing a state before engagement, and (b) is a perspective view showing a state after engagement. [Figure 6] 6(a) is a reference diagram showing the entire three-dimensional structure, and FIG. 6(b) is an enlarged view of part A in FIG. 6(a). [Figure 7] 7(a) is a reference diagram showing the entire three-dimensional structure, and FIG. 7(b) is an enlarged view of part B in FIG. 7(a) . [Figure 8] 1A to 1C are three-view drawings showing one embodiment of a kumiko piece made of an elastic material, where (a) is a front view, (b) is a plan view, and (c) is a side view. [Figure 9] 11A to 11C are three-view drawings showing another embodiment of a kumiko piece made of an elastic material, where (a) is a front view, (b) is a plan view, and (c) is a side view. [Figure 10] 11A to 11C are three-view drawings showing still another embodiment of a kumiko piece made of an elastic material, where (a) is a front view, (b) is a plan view, and (c) is a side view. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. Note that the following embodiments do not limit the inventions according to the claims, and all of the combinations of features described in the embodiments are not necessarily essential to the solution of the invention.

[0021] FIG. 1 is a perspective view showing a solid kumbling structure of the present invention, and FIG. 2 is a perspective view showing a hexagonal kumbling member that constitutes the solid kumbling structure of the present invention.

[0022] The three-dimensional kumiko structure 1 according to this embodiment is formed by continuously arranging hexagonal kumiko 2 in a planar shape, as shown in Fig. 1. Moreover, the hexagonal kumiko 2 is formed by interlocking a plurality of first kumiko pieces 10 and a plurality of second kumiko pieces 20, as shown in Figs. 1 and 2.

[0023] First, the structures of the first kumbling piece 10 and the second kumbling piece 20 according to this embodiment will be described.

[0024] Fig. 3 is a drawing showing a first kumiko piece of the present invention, (a) being a front view and (b) being a plan view, and Fig. 4 is a drawing showing a second kumiko piece of the present invention, (a) being a front view and (b) being a plan view. In this specification, the long side direction and short side direction of each kumiko piece are defined as the directions of the arrows shown in Fig. 3(a) and Fig. 4(a), and the board thickness direction of each kumiko piece is defined as the directions of the arrows shown in Fig. 3(b) and Fig. 4(b).

[0025] The first kumiko piece 10 is a substantially rectangular plate-like member, and is made of, for example, wood such as cedar or cypress, or a relatively hard material such as resin or metal.

[0026] 3, the first kumbling piece 10 is formed, for example, into a rectangle having long sides 11 and short sides 12. At least two engagement portions 13 are formed on one long side 11 of the first kumbling piece 10 at positions spaced apart in the long side direction.

[0027] The engagement portion 13 is a groove portion that penetrates in the plate thickness direction and extends from the side surface that forms the long side 11 toward the short side 12 , and is composed of a deep groove 14 and a shallow groove 15 .

[0028] As shown in FIG. 3(b), the deep groove 14 has a groove width inclined at a predetermined angle with respect to the plate thickness direction, and as an example, is formed at an inclination angle of 60° with respect to the surface facing the plate thickness direction. 14 is the plate thickness dimension T of the second kumbling piece 20 2 is formed to correspond to

[0029] As shown in FIG. 3(a), the deep groove 14 has a depth dimension D 14 The length dimension H of the short side 12 1 The deep groove 14 is formed to a depth of approximately two-thirds of the depth of the groove 14, and a groove bottom 14a is formed at the bottom of the deep groove 14.

[0030] As shown in FIG. 3(b), the shallow groove 15 has a groove width that is inclined at a predetermined angle with respect to the plate thickness direction and is inclined in a direction intersecting the inclination direction of the deep groove 14. As an example, the shallow groove 15 is formed at an inclination angle of 120° with respect to the surface facing the plate thickness direction. In addition, the groove width dimension G of the shallow groove 15 is 15 is the plate thickness dimension T of the first kumbling piece 10 1 is formed to correspond to

[0031] As shown in FIG. 3(a), the shallow groove 15 has a depth dimension D 15 The length dimension H of the short side 12 1 The shallow groove 15 is formed to a depth of approximately half the depth of the groove 12, and a step portion 15a is formed at the bottom of the shallow groove 15.

[0032] Long side dimension W of the first kumbling piece 10 1 , the distance between the multiple engagement portions 13 in the long side direction, and the short side dimension H 1 is arbitrarily determined according to the shape of the three-dimensional structure described below.

[0033] The second kumiko piece 20 is a substantially rectangular plate-like member, and is formed from a material that is softer than the material used for the first kumiko piece 10. The material used for the second kumiko piece 20 is preferably an elastic material, and rubber, resin, or the like can be used. In this embodiment, the material used for the second kumiko piece 20 is preferably a thermoplastic polyurethane elastomer that can be molded using a 3D printer or the like, and that combines the elasticity of rubber with the strength of hard plastic.

[0034] 4, the second kumbling piece 20 is formed, for example, into a rectangle having long sides 21 and short sides 22. At least two engagement portions 23 are formed on each of the long sides 21 on both sides of the second kumbling piece 20, at positions spaced apart in the long side direction.

[0035] The engagement portion 23 is a groove that penetrates in the plate thickness direction and extends from the side surface that forms the long side 21 toward the short side 22 .

[0036] As shown in FIG. 4(b), the groove width of the engagement portion 23 is inclined at a predetermined angle with respect to the plate thickness direction, and as an example, the engagement portion 23 formed on one long side 21 is formed at an inclination angle of 60° with respect to the surface facing the plate thickness direction. The inclination direction of the engagement portion 23 formed on one long side 21 and the inclination direction of the engagement portion 23 formed on the other long side 21 are formed so as to intersect with each other when viewed from the short side direction, and as an example, the engagement portion 23 formed on the other long side 21 is formed at an inclination angle of 120° with respect to the surface facing the plate thickness direction. The groove width dimension G of the engagement portion 23 23 is the plate thickness dimension T of the first kumbling piece 10 1 is formed to correspond to

[0037] As shown in FIG. 4(a), the engagement portion 23 has a depth dimension D 23 But the short side dimension H 2 The engaging portion 23 is formed to a depth of approximately one third of the depth of the groove 23a.

[0038] Long side dimension W of the second kumbling piece 20 2 , and the intervals between the multiple engaging portions 23 in the long side direction are determined arbitrarily in accordance with the shape of the three-dimensional structure described later. 2 is the short side dimension H of the first kumbling piece 10 1 It is preferable that the axial length of the slit is formed so as to correspond to the axial length of the slit.

[0039] Next, a method for engaging the first and second knot pieces 10 and 20 will be described.

[0040] FIG. 5 shows the first and second clasp pieces of the present invention, where (a) is a perspective view showing the state before engagement and (b) is a perspective view showing the state after engagement.

[0041] As shown in Figures 5(a) and (b), the engaging portion 13 of the first kumiko piece 10 and the engaging portion 23 of the second kumiko piece 20 can be engaged with each other, and the second kumiko piece 20 can be engaged so as to be sandwiched between multiple first kumiko pieces 10 from both sides in the direction of its short side.

[0042] Specifically, when the first kumiko piece 10 is engaged with one long side 21 of the second kumiko piece 20, the deep groove 14 of the engaging portion 13 clamps the second kumiko piece 20 in its plate thickness direction. At the same time, the engaging portion 23 clamps the first kumiko piece 10 in its plate thickness direction. The engagement between the first kumiko piece 10 and the second kumiko piece 20 is completed when the groove bottom 14a and the groove bottom 23a come into contact with each other. As a result, the first kumiko piece 10 and the second kumiko piece 20 are restrained in a direction intersecting with the short side direction.

[0043] Furthermore, since the engaging portions 13, 23 are formed so that the groove width is inclined with respect to the plate thickness direction of each of the kumiko pieces, the long side direction of the first kumiko piece 10 and the long side direction of the second kumiko piece 20 intersect at a predetermined angle.

[0044] In addition, the groove width dimension G of the deep groove 14 14 is the plate thickness dimension T of the second kumbling piece 20 2 The groove width dimension G of the engagement portion 23 is formed to correspond to the groove width dimension G of the engagement portion 23. 23 is the plate thickness dimension T of the first kumbling piece 10 1 Since the first and second knot pieces 10 and 20 are formed to correspond to each other, no gap is generated in the groove width direction between the first and second knot pieces 10 and 20 after engagement.

[0045] Similarly, when the first kumiko piece 10 is engaged with the second kumiko piece 20 from the other long side 21 side, the deep groove 14 of the engaging portion 13 holds the second kumiko piece 20 in its thickness direction, and the engaging portion 23 holds the first kumiko piece 10 in its thickness direction. The engagement between the first kumiko piece 10 and the second kumiko piece 20 is completed when the groove bottom 14a and the groove bottom 23a come into contact with each other.

[0046] In this way, the three-dimensional kumiko structure 1 according to this embodiment is configured such that the second kumiko piece 20, which is softer than the first kumiko piece 10, is sandwiched between and engaged with a plurality of first kumiko pieces 10 in the short side direction.

[0047] At the same time, the step portions 15a of the two first kumbling pieces 10 come into contact with each other. As a result, no gap is generated in the short side direction between the first kumbling pieces 10 after the engagement. 15 is the plate thickness dimension T of the first kumbling piece 10 1 Since the first mating pieces 10 are formed to correspond to the groove width direction, no gap is generated between the first mating pieces 10 after engagement.

[0048] In addition, the short side dimension H of the first kumbling piece 10 1 and the short side dimension H of the second kumbling piece 20 2 By matching them, the side surface forming the long side 11 of the first kumbling piece 10 and the side surface forming the long side 21 of the second kumbling piece 20 can be engaged in a flat state without any step.

[0049] Next, a method for forming the hexagonal kumbling piece 2 and the three-dimensional kumbling piece structure 1 using the first kumbling piece 10 and the second kumbling piece 20 that can be engaged with each other as described above will be described.

[0050] As with the above-mentioned engagement method, by repeatedly combining the first kumiko pieces 10 or the second kumiko pieces 20 with the multiple engagement portions 13, 23 formed on the long sides of each kumiko piece, a hexagonal kumiko 2 can be formed as shown in Fig. 2. At this time, the second kumiko pieces 20 are positioned so as to form a pair of opposing sides of the hexagonal kumiko 2.

[0051] As shown in Figure 1, the three-dimensional kumiko structure 1 is constructed by repeatedly engaging the first kumiko pieces 10 and the second kumiko pieces 20 to continuously arrange the hexagonal kumiko 2 in a planar shape. The size of the three-dimensional kumiko structure 1 is determined according to the size of the three-dimensional structure that will be the final product, and the required number of first kumiko pieces 10 and second kumiko pieces 20 are used.

[0052] As described above, the three-dimensional kumiko structure 1 is constructed by combining multiple hexagonal kumiko pieces 2, each having a second kumiko piece 20 made of a soft material. Therefore, the three-dimensional kumiko structure 1 formed into a planar shape as shown in FIG. 1 has a structure that can be freely bent.

[0053] The three-dimensional kumbling structure 1 according to this embodiment can be freely curved to form the surface of a three-dimensional structure having a curved surface, such as a cylindrical shape as shown in FIG. 6 or a dress shape as shown in FIG.

[0054] In addition, the first and second kumbling pieces 10 and 20 have a long side dimension W 1 , W 2 and engagement portion 13, Since the spacing between 23 is set in advance to correspond to the shape of the three-dimensional structure, by appropriately engaging each kumiko piece while bending the three-dimensional kumiko structure 1, a three-dimensional structure of the desired shape can be formed without using jigs or the like.

[0055] Furthermore, when the three-dimensional kumiko structure 1 is curved to form a three-dimensional structure, the second kumiko piece 20 made of an elastic material deforms within the range of elastic deformation. For this reason, when the kumiko pieces are engaged to form a three-dimensional structure while the three-dimensional kumiko structure 1 is curved, an appropriate tensile load is applied between the first kumiko piece 10 and the second kumiko piece 20. For this reason, the three-dimensional structure made of the three-dimensional kumiko structure 1 can firmly maintain its shape without using any joining materials such as adhesives.

[0056] In this way, the three-dimensional kumiko structure 1 of this embodiment can form a three-dimensional structure by engaging the first kumiko piece 10 and the second kumiko piece 20 without using any joining materials such as adhesive, eliminating the need for time for the adhesive to harden, and improving productivity compared to conventional production processes.

[0057] Furthermore, in the three-dimensional kumiko structure 1 according to this embodiment, the engagement points between the first kumiko piece 10 and the second kumiko piece 20 are not fixed, so it is possible to respond even if it becomes necessary to rearrange the kumiko pieces.

[0058] Furthermore, the three-dimensional kumiko structure 1 of this embodiment does not have an engagement recess at the engagement point between the first kumiko piece 10 and the second kumiko piece 20 as in conventional kumiko decoration structures, and no gaps are created between the engagement parts 13, 23 and each kumiko piece, making it possible to form a three-dimensional structure with excellent design.

[0059] The kumiko pieces provided in the three-dimensional kumiko structure 1 are not limited to the shapes of the above-mentioned first kumiko piece 10 and second kumiko piece 20, and may be of any shape that corresponds to the shape of the desired three-dimensional structure. For example, the kumiko piece placed at the end of the three-dimensional structure that will be the final product may be shaped to have only one engaging portion in the long side direction.

[0060] Furthermore, the second kumiko piece 20 made of an elastic material can be formed by a 3D printer as described above, and can therefore be formed into a more complicated structure than conventional kumiko pieces. Therefore, the three-dimensional kumiko structure 1 may be formed by combining, for example, a third kumiko piece 30 as shown in Fig. 8, or fourth kumiko pieces 40, 40' as shown in Figs. 9 and 10 with the first kumiko piece 10 and the second kumiko piece 20 in accordance with the shape of the desired three-dimensional structure.

[0061] The third kumiko piece 30 is made of an arc-shaped plate-like member, and has at least two engaging portions 23 on both sides of the long side that extends in an arc shape. The third kumiko piece 30, like the second kumiko piece 20, is made of a material that is softer than the material used for the first kumiko piece 10, and is preferably made of an elastic material such as rubber or resin, and more preferably made of a thermoplastic polyurethane elastomer.

[0062] The fourth kumiko pieces 40, 40' have a plurality of rectangular plate-like portions 41, which are connected to each other by connecting portions 42, 42' while being spaced apart in the plate thickness direction. The rectangular plate-like portions 41 have at least two engaging portions 23 on both sides of each long side. The fourth kumiko pieces 40, 40', like the second kumiko pieces 20, are made of a material that is softer than the material used for the first kumiko pieces 10, and are preferably made of an elastic material such as rubber or resin, and more preferably made of a thermoplastic polyurethane elastomer. Furthermore, by providing the connecting portions 42, 42', the fourth kumiko pieces 40, 40' can move the connecting portions 42, 42' like hinges, and can form a three-dimensional structure having movable portions.

[0063] In this embodiment, the first kumiko piece 10 is made of wood such as cedar or cypress, as well as materials such as resin and metal, and the second kumiko piece 20, the third kumiko piece 30 and the fourth kumiko piece 40, 40' are made of a material that is softer than the material of the first kumiko piece 10, and are made of elastic materials such as rubber, resin and thermoplastic polyurethane elastomer, but the materials used for each kumiko piece are not limited to one type, and may contain two or more types. It is clear from the claims that such modified or improved forms are also included in the technical scope of the present invention. [Explanation of symbols]

[0064] 1 three-dimensional kumiko structure, 2 hexagonal kumiko, 10 first kumiko piece, 11 long side, 12 short side, 13 engagement portion, 14 deep groove, 14a groove bottom portion, 15 shallow groove, 15a step portion, 20 second kumiko piece, 21 long side, 22 short side, 23 engagement portion, 23a Groove bottom portion, 30 third muntin piece, 40, 40' fourth muntin piece, 41 rectangular plate portion, 42, 42' connecting portion.

Claims

1. A three-dimensional kumiko structure including a first kumiko piece and a second kumiko piece, The first kumbling piece has a rectangular plate shape and has at least two engagement portions on one long side, The second kumbling piece has a rectangular plate shape and has at least two engagement portions on each of the long sides. A three-dimensional kumiko structure, wherein the second kumiko piece is softer than the first kumiko piece.

2. The three-dimensional structure according to claim 1, the first kumbling piece and the second kumbling piece engage with each other to form a hexagonal kumbling piece; The three-dimensional kumiko structure is characterized in that the hexagonal kumiko are continuously arranged in a plane.

3. The three-dimensional structure according to claim 2, The three-dimensional kumiko structure is characterized in that the second kumiko pieces form at least a pair of opposing sides of the hexagonal kumiko.

4. In the three-dimensional lattice structure according to any one of claims 1 to 3, A three-dimensional kumiko structure, wherein the second kumiko piece is made of an elastic material.

5. The three-dimensional structure according to claim 4, The three-dimensional kumbling structure is characterized in that the elastic material is a thermoplastic polyurethane elastomer.

6. The three-dimensional structure according to claim 1, A third kumiko piece is provided; The three-dimensional kumiko structure is characterized in that the third kumiko piece has an arc-shaped plate shape, has at least two engaging portions on each of the long sides, and is softer than the first kumiko piece.

7. The three-dimensional structure according to claim 1, A fourth kumiko piece is provided; the fourth kumbling piece has a plurality of rectangular plate-shaped portions and a connecting portion, and is softer than the first kumbling piece; The rectangular plate-shaped portion has at least two engagement portions on each of the long sides, A three-dimensional kumiko structure, characterized in that the connecting portions connect the rectangular plate-shaped portions at a distance in the plate thickness direction.

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