JP7213599B1 - Structure - Google Patents

Abstract

A structure capable of suppressing a relatively large increase in local stress and stiffness when deformed in a specific deformation mode is provided. A first structure extending in a predetermined direction in a first repeating shape and a plate-like or second structure extending in a predetermined direction in a second repeating shape are connected in a plurality of connecting portions along a predetermined direction. A structure having a shape based on a basic structure that is combined so that the formed. [Selection drawing] Fig. 1

Description

The present disclosure relates to structures.

Conventionally, a first structure extending in a zigzag shape in a predetermined direction and a second structure extending in a plate shape in a predetermined direction are simple so that a plurality of connecting portions appear at intervals along a predetermined direction. (see Non-Patent Documents 1 and 2).

Iwafune, Ohsima and Ochiai, Coded Skeleton, [online], [searched on May 18, 2020], Internet <URL: https://digitalnature.slis.tsukuba.ac.jp/2016/06/coded-skeleton /> Iwafune, Ohsima and Ochiai, Coded skeleton: programmable bodies for shape changing user interfaces, [online], [searched May 18, 2020], Internet <URL: https://dl.acm.org/doi/10.1145 /2945078.2945096>

In the basic structure, which is the structure of Non-Patent Documents 1 and 2, when the distance between two connecting portions adjacent in a predetermined direction is relatively short, when deformed in a specific deformation mode, the adjacent portions in this predetermined direction This can lead to relatively large increases in stress and stiffness between the two mating connections. A relatively large local increase in stress or stiffness may cause damage or make it difficult to change the desired shape.

A main object of the structure of the present disclosure is to provide a structure capable of suppressing a relatively large increase in local stress and stiffness when deformed in a specific deformation mode.

The structure of the present disclosure has taken the following measures to achieve the above main objectives.

The structure of the present disclosure is
A first structure extending in a predetermined direction in a first repeated shape and a second structure in a plate shape or extending in a second repeated shape in the predetermined direction are arranged such that a plurality of connecting portions are spaced apart along the predetermined direction. A structure of shape based on the basic structure of shape combined so as to appear at
The structure is formed in a shape such that the distance between two adjacent connection portions in the predetermined direction is longer than that of the basic structure.
This is the gist of it.

The structure of the present disclosure is formed in a shape in which the distance between two adjacent connection portions in a predetermined direction is longer than that of the basic structure. As a result, when deformed in a specific deformation mode, it is possible to suppress a relatively large increase in stress and stiffness locally, specifically between two connecting portions adjacent in a predetermined direction. can. As a result, it becomes possible to deform into a desired shape while suppressing damage. Here, as the "first repeating shape" and the "second repeating shape", for example, a wave shape such as a rectangular wave shape, a sine wave shape, a triangular wave shape, and a spiral shape can be mentioned.

FIG. 3 is an external perspective view of a structure 20A of an example; FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; FIG. 2 is a cross-sectional view taken along the line BB of FIG. 1; 2 is a cross-sectional view taken along line CC of FIG. 1; FIG. FIG. 3 is an external perspective view of a structure 20B of a first comparative example; FIG. 6 is a cross-sectional view taken along the line AA of FIG. 5; FIG. 6 is a cross-sectional view taken along the line BB of FIG. 5; 6 is a cross-sectional view taken along line CC of FIG. 5; FIG. 3 is an external perspective view of a first structure 30; FIG. 4 is an external perspective view of a second structure 40; FIG. FIG. 11 is an external perspective view of a structure 20C of a modified example; FIG. 12 is a cross-sectional view taken along the line AA of FIG. 11; FIG. 12 is a cross-sectional view taken along the line BB of FIG. 11; FIG. 12 is a sectional view taken along line CC of FIG. 11; FIG. 12 is a cross-sectional view taken along line DD of FIG. 11; It is an external appearance perspective view of 120 A of structures of a modification. FIG. 11 is an external perspective view of a structure 120B of a second comparative example; 4 is an external perspective view of the first structure 130; FIG. FIG. 4 is an external perspective view of a second structure 140;

Next, a mode for carrying out the present disclosure will be described using examples.

1 is an external perspective view of a structure 20A according to an embodiment of the present disclosure, FIG. 2 is a cross-sectional view along line AA in FIG. 1, and FIG. 3 is a cross-sectional view along line BB in FIG. FIG. 4 is a cross-sectional view taken along line CC of FIG. 5 is an external perspective view of the structure 20B of the first comparative example, FIG. 6 is a cross-sectional view along line AA in FIG. 5, and FIG. 7 is a cross-sectional view along line BB in FIG. , and FIG. 8 is a sectional view taken along line CC of FIG. 9 is an external perspective view of the first structure 30, and FIG. 10 is an external perspective view of the second structure 40. FIG. The left-right direction, the front-rear direction, and the up-down direction are as shown in FIGS. 9, the axis L1 is a line connecting the center of the first structure 30 in the vertical direction and the front-rear direction at any position in the left-right direction, and the axis L2 in FIG. It is a line connecting the center of the structure 40 in the vertical direction and the front-rear direction at an arbitrary position in the left-right direction. Furthermore, in the following description, numbers and letters in [ ] in the specification correspond to subscripts (subscript numbers) in each figure.

The structure 20A of the embodiment in FIGS. 1 to 4 and the structure (basic structure) 20B of the first comparative example in FIGS. , 3D printing, casting, forging, pressing, cutting, extrusion molding, 3D printing, etc. of metal materials. A first structure 30 in FIG. 9 and a second structure 40 in FIG. 10 are basic structures used in structures 20A and 20B. 9, the second structure 40 of FIG. 10, the structure 20B of the first comparative example of FIGS. 5 to 8, and the structure 20A of the example of FIG. I will explain in order.

The first structure 30 of FIG. 9 will be described. As shown in the figure, the first structure 30 has a constant thickness and width (length in the vertical direction) and is formed in a serpentine shape extending in the left-right direction while winding in a rectangular wave shape in the front-rear direction. The first structure 30 includes fifteen front and rear plate-shaped portions 31[1] to 31[15] (hereinafter sometimes simply referred to as “front and rear plate-shaped portions 31”) and eight front plate-shaped portions 32[ 1] to 32 [8] (hereinafter simply referred to as “front plate-shaped portion 32”) and eight rear plate-shaped portions 33 [1] to 33 [8] (hereinafter simply referred to as “rear plate-shaped portion 33”).

The 15 front and rear plate-shaped portions 31[1] to 31[15] are each formed in a rectangular flat plate shape extending in the front-rear direction and having a constant thickness (horizontal length) and width (vertical length). They are arranged side by side at intervals in the left-right direction. In the embodiment, the 15 front and rear plate-shaped portions 31[1] to 31[15] are all formed in the same shape, and each has a width, a length in the front-rear direction, and a thickness in order from the long side. .

Each of the eight front side plate-like portions 32[1] to 32[8] is formed in a rectangular flat plate shape extending in the left-right direction and having a constant thickness (length in the front-rear direction) and width (length in the vertical direction). It is The left ends of the front plate-shaped portions 32[i] (i:1 to 8) are respectively connected to the front ends of the front and rear plate-shaped portions 31[2i-1], and the front plate-shaped portions 32[j] (j: 1 to 7) are connected to the front ends of the front and rear plate-like portions 31 [2j], respectively. In the embodiment, the eight front side plate-shaped portions 32[1] to 32[8] are all formed in the same shape, and each has a width, a length in the left-right direction, and a thickness in order from the long side. .

Each of the eight rear plate-like portions 33[1] to 33[8] is formed in a rectangular flat plate shape extending in the left-right direction and having a constant thickness (length in the front-rear direction) and width (length in the vertical direction). It is The right ends of the rear plate-shaped portions 33[i] (i: 1 to 8) are respectively connected to the rear ends of the front and rear plate-shaped portions 31[2i-1], and the rear plate-shaped portions 33[j+1](j : 1 to 7) are respectively connected to the rear ends of the front and rear plate-like portions 31[2j]. In the embodiment, the eight rear plate-like portions 33[1] to 33[8] are all formed in the same shape as the eight front plate-like portions 32[1] to 32[8]. The width, the length in the left-right direction, and the thickness are arranged in order from the long side.

As a whole, the first structure 30 includes up-down bending that is bending in the vertical direction of the left end and right end with respect to the reference state, front-back bending that is bending in the front-rear direction of the left end and right end with respect to the reference state, and bending with respect to the reference state. It is designed so that lateral expansion and contraction, which is expansion and contraction in the horizontal direction, has lower rigidity than twisting around the horizontal axis, which is twisting of the left end and right end with respect to the reference state. The reference state of the first structure 30 is the state shown in FIG.

Next, the second structure 40 of FIG. 10 will be described. As shown in the figure, the second structure 40 is formed in the shape of a rectangular flat plate that has a constant thickness (length in the vertical direction) and width (length in the front-back direction) and extends in the left-right direction. In the embodiment, the thickness of the second structure 40 is designed to be substantially the same as the thickness of the first structure 30 . The length of the second structure 40 in the front-rear direction is designed to be slightly shorter than the length of the first structure 30 in the front-rear direction. Furthermore, the length of the second structure 40 in the left-right direction is designed to be slightly longer than the length of the first structure 30 in the left-right direction. The second structure 40 as a whole is designed so that vertical bending and twisting around a horizontal axis have lower rigidity than longitudinal bending and horizontal expansion and contraction. The reference state of the second structure 40 is the state shown in FIG.

Next, the structure 20B of the first comparative example shown in FIGS. 5 to 8 will be described. As illustrated, in the structure 20B of the first comparative example, the first structure 30 of FIG. 9 and the second structure 40 of FIG. It is formed into a simple combined shape to match. Therefore, the structure 20B of the first comparative example includes a first structure 30B and a second structure 40B having shapes corresponding to (similar to) the first structure 30 and the second structure 40, respectively.

The first structure 30B includes 15 front and rear plate-like portions 31[1] to 31[15], 8 front plate-like portions 32[1] to 32[8], and 8 rear plates of the first structure 30. Fifteen front and rear plate-like portions 31B[1] to 31B[15] and eight front plate-like portions 32B[1] having shapes corresponding to (or similar to) the shape portions 33[1] to 33[8]. 32B[8] and eight rear plate-like portions 33B[1] to 33B[8].

In the structure 20B of the first comparative example, as shown in FIG. 6, 15 front and rear plate-like portions 31B[1] to 31B[15] of the first structure 30B and the second structure 40B are connected by 15 connections. They are connected at sections 21B[1] to 21B[15] (hereinafter sometimes simply referred to as "connection section 21B"). Further, as shown in FIG. 7, the eight front plate-like portions 32B[1] to 32B[8] of the first structure 30B and the second structure 40B are connected to the eight connection portions 22B[1] to 22B[ 8] (hereinafter sometimes simply referred to as “connection portion 22B”). Furthermore, as shown in FIG. 8, the eight rear plate-like portions 33B[1] to 33B[8] of the first structure 30B and the second structure 40B are connected to eight connection portions 23B[1] to 23B[ 8] (hereinafter sometimes simply referred to as “connection portion 23B”). Therefore, in the structure 20B of the first comparative example, 15 connection portions 21B appear at intervals along the left-right direction at the central portion (portion other than the front end portion and the rear end portion) in the front-rear direction, and at the front end portion. Eight connecting portions 22B appear at intervals along the left-right direction, and eight connecting portions 23B appear at intervals along the left-right direction at the rear end portion. In the structure 20B, the distance between two adjacent connection portions 21B in the left-right direction is equal to the distance between two adjacent front and rear plate-shaped portions 31B, and the distance between two adjacent connection portions 22B is The distance between two adjacent front plate-shaped portions 32B is equal, and the distance between two adjacent connection portions 23B is equal to the distance between two adjacent rear plate-shaped portions 33B. Also, as can be seen from FIGS. ] are connected in a zigzag shape extending in the left-right direction while winding in the front-rear direction.

In the structure 20B of the first comparative example, the first structure 30 (30B) having lower rigidity in vertical bending, front-back bending, and left-right expansion and contraction than the twisting around the left-right axis, Since the second structure 40 (40B), which has a low rigidity compared to lateral expansion and contraction, is formed in a shape simply combined, the first and second structures 30B, 40B have relatively low rigidity in common. Bending has lower rigidity than front-back bending, left-right expansion and contraction, and left-right torsion.

Next, the structure 20A of the embodiment shown in FIGS. 1-4 will be described. As illustrated, the structural body 20A of the example is formed in a shape based on the structural body 20B of the first comparative example (a partially modified shape). The structure 20A of the example includes a first structure 30A having a shape based on the first structure 30B, and a second structure 40A having a shape corresponding to (similar to) the second structure 40B.

The first structure 30A includes 15 front and rear plate-like portions 31B[1] to 31B[15], 8 front plate-like portions 32B[1] to 32B[8], 8 Fifteen front and rear plate-shaped portions 31A [1] to 31A [15], eight front plate-shaped portions 31A [1] to 31A [15] having shapes based on the rear plate-shaped portions 33B [1] to 33B [8] (shapes partially modified) It has side plate-like portions 32A[1] to 32A[8] and eight rear plate-like portions 33A[1] to 33A[8].

As shown in FIGS. 1 and 2, the fifteen front and rear plate-like portions 31A[1] to 31A[15] of the first structure 30A each have a hole 31Aa. It is different from the 15 front and rear plate-like portions 31B[1] to 31B[15]. The hole 31Aa extends near the central portion in the vertical direction of each of the front and rear plate-like portions 31A, specifically, extends from the upper side to the lower side of the second structure 40A (the upper wall surface and the lower wall surface of the hole 31Aa). are opposed to the upper and lower surfaces of the front and rear plate-shaped portions 31A with a gap therebetween). As a result, the front and rear plate-like portions 31A and the second structure 40A are not connected. Therefore, in the structure 20A of the embodiment, in the central portion (other than the front end and the rear end) in the front-rear direction, the connecting portions between the front and rear plate-like portions 31A of the first structure 30A and the second structure 40A in the left-right direction , that is, the shape obtained by removing all the connecting portions 21B from the structure 20B of the first comparative example.

As shown in FIGS. 1 and 3, the eight front plate-like portions 32A[1] to 32A[8] of the first structure 30A each have a concave portion 32Aa and a concave portion 32Ab. It differs from the eight front plate-like portions 32B[1] to 32B[8] of structure 30B. Each recessed portion 32Aa is formed so as to be recessed rightward at a constant angle from the upper and lower sides of the second structure 40A toward the second structure 40A in the left end surface of each front plate-like portion 32A. Further, each recess 32Ab is formed so as to be recessed leftward at a constant angle from the upper and lower sides of the second structure 40A in the right end surface of each front plate-like portion 32A toward the second structure 40A. In addition, the shape of recessed part 32Aa and recessed part 32Ab is not limited to this. These recesses 32Aa and 32Ab provide eight connection portions 22A[1] to 22A[8] between the eight front plate-like portions 32A[1] to 32A[8] of the first structure 30A and the second structure 40A. (hereinafter sometimes simply referred to as “connection portion 22A”) is the length of each of the eight connection portions 22B[1] to 22B[8] of the structure 20B of the first comparative example. It becomes shorter than the length in the left-right direction. Therefore, in the structures 20A and 20B of the example and the first comparative example, the distance between the two adjacent connection portions 22A of the structure 20A in the left-right direction at the front end in the front-rear direction is It is longer than the distance between the two connection parts 22B (the distance between the two adjacent front plate-like parts 32A and 32B of the structures 20A and 20B).

As shown in FIGS. 1 and 4, the eight rear plate-like portions 33A[1] to 33A[8] of the first structure 30A each have a concave portion 33Aa and a concave portion 33Ab. It differs from the eight rear plate-like portions 33B[1] to 33B[8] of structure 30B. Each recess 33Aa is formed so as to be recessed rightward at a constant angle from the upper and lower sides of the second structure 40A toward the second structure 40A in the left end surface of each rear plate-like portion 33A. Further, each recess 33Ab is formed so as to be recessed leftward at a constant angle from the upper and lower sides of the second structure 40A in the right end surface of each rear plate-like portion 33A toward the second structure 40A. In addition, the shape of recessed part 33Aa and recessed part 33Ab is not limited to this. These recessed portions 33Aa and recessed portions 33Ab create eight connection portions 23A[1] to 23A[8] between the eight rear plate-like portions 33A[1] to 33A[8] of the first structure 30A and the second structure 40A. (hereinafter sometimes simply referred to as “connection portion 23A”) is the length of each of the eight connection portions 23B[1] to 23B[8] of the structure 20B of the first comparative example. It becomes shorter than the length in the left-right direction. Therefore, in the structures 20A and 20B of the example and the first comparative example, the distance between the two adjacent connection portions 23A of the structure 20A in the left-right direction is equal to that of the structure 20B at the rear ends in the front-rear direction. It is longer than the distance between the two connecting portions 23B that meet (the distance between the two adjacent rear plate-like portions 33A and 33B of the structures 20A and 20B).

Similar to the structure 20B of the first comparative example, in the structure 20A of the example, the rigidity in vertical bending is lower than that in vertical bending, horizontal expansion and contraction, and twisting around the horizontal axis.

In the structure 20A of the example described above, each of the front and rear plate-like portions 31A of the first structure 30A has a hole 31Aa, so that all connections from the structure 20B of the first comparative example are made at the central portion in the front-rear direction. It has a shape in which the portion 21B is removed. Further, in the structure 20A, each front plate-like portion 32A of the first structure 30A has a recess 32Aa and a recess 32Ab, respectively. The length in the left-right direction is shortened, and the distance between two connecting portions 22A adjacent in the left-right direction is increased. Further, in the structure 20A, each rear plate-like portion 33A of the first structure 30A has a recess 33Aa and a recess 33Ab, respectively. are shorter in the left-right direction, and the distance between two connecting portions 23A adjacent in the left-right direction is longer. As a result, when a vertical bending load is applied to the structural bodies 20A and 20B of the embodiment and the first comparative example, the structural body 20A has a lower connection portion at the central portion in the front-rear direction than the structural body 20B. By not having a It is possible to suppress a relatively large increase in stress and stiffness due to a long distance between two mating connecting portions 23A. The inventors confirmed this by analysis. As a result, the structural body 20A can be deformed into a desired shape by longitudinal bending while suppressing damage in vertical bending as compared with the structural body 20B.

In addition, the structure 20A of the embodiment is configured as an integrally molded member that is integrally molded from a resin material, a rubber material, a metal material, or the like. In contrast, it is possible to suppress the influence of bonding, for example, variations in the dimensions and characteristics of the entire structure 20A.

In the structural body 20A of the embodiment, each front plate-like portion 32A has a recess 32Aa recessed to the right from the left end surface and a recess 32Ab recessed to the left from the right end surface. However, each front plate-like portion 32A may have only one of the recessed portion 32Aa and the recessed portion 32Ab. Even in this case, compared to the structure 20B, the length of each connecting portion 22A between the front plate-like portion 32A and the second structure 40A in the left-right direction is shorter, and two connecting portions adjacent in the left-right direction become shorter. Since the distance between 22A becomes longer, the same effect as that of the structure 20A can be exhibited to some extent. The same applies to each rear plate-like portion 33A.

In the structural body 20A of the embodiment, the eight front plate-like portions 32A each have a recess 32Aa and a recess 32Ab, and the eight rear plate-like portions 33A each have a recess 33Aa and a recess 33Ab. Compared to the structure 20B, the distance between the two connecting portions 22A adjacent in the left-right direction is longer at the front end in the front-rear direction, and the distance between the two connecting portions 23A adjacent in the left-right direction is longer at the rear end. It is assumed that the distance between However, it is not limited to this as long as the distance between two adjacent connecting portions in the left-right direction is longer than that of the structure 20B at the front end and the rear end in the front-rear direction. For example, one can consider the following structure 20C.

11 is an external perspective view of a structure 20C of a modified example, FIG. 12 is a cross-sectional view along line AA in FIG. 11, FIG. 13 is a cross-sectional view along line BB in FIG. , and FIG. 15 is a sectional view taken along the line DD of FIG. As illustrated, the structural body 20C of the modified example is formed in a shape based on the structural body 20B of the first comparative example (a shape partially modified). A modified structure 20C comprises a first structure 30C and a second structure 40C shaped based on the first structure 30B and the second structure 40B.

The first structure 30A has a shape based on the fifteen front and rear plate-like portions 31B[1] to 31B[15] of the first structure 30B of the structure 20B (a shape obtained by partially changing the shape), and is the first structure of the structure 20A. 15 front and rear plate-like portions 31C[1] to 31C[15] and 8 front side plate-like portions 32B[1] to 32B[8] and 8 pieces of shapes corresponding to (or similar to) structure 30A Eight front plate-like portions 32C[1] to 32C[8] and eight rear plate-like portions 33C[ 1] to 33C [8].

As shown in FIGS. 11 and 12, the fifteen front and rear plate-like portions 31C[1] to 31C[15] of the first structure 30C are arranged in parallel with the fifteen front and rear plate-like portions 31A of the first structure 30A of the structural body 20A. [1] to 31A[15] each have a hole 31Ca in the same way that each has a hole 31Aa. As a result, the fifteen front and rear plate-like portions 31C[1] to 31C[15] are not connected to the second structure 40C. Therefore, in the structural body 20C of the modified example, the connecting portion between the front and rear plate-like portions 31C of the first structure 30C and the second structure 40C is formed in the left-right direction at the central portion (other than the front end portion and the rear end portion) in the front-rear direction. 15 connection portions 21B are removed from the structure 20B of the first comparative example.

As shown in FIGS. 11 and 13 to 15, the second structure 40C differs from the second structure 40B of the structure 20B in that it has four recesses 40Ca and four recesses 40Cb. Each recess 40Ca is recessed rearward from the front end surface so that the inner wall surface faces the left end surface, the right end surface, and the rear end surface of the front plate-shaped portion 32C [2k] (k: 1 to 4) with a gap. formed by Each recess 40Cb is recessed forward from the rear end surface so that the inner wall surface faces the left end surface, the right end surface, and the front end surface of the rear plate-shaped portion 33C[2k] with a gap therebetween. Accordingly, in the structural body 20C, the second structure 40C includes the four front plate-like portions 32C[2k-1] (k: 1 to 4) and the four connecting portions 22C[2k-1] of the first structure 30C. ] (hereinafter sometimes simply referred to as “connecting portion 22C”), four rear plate-like portions 33C [2k-1] and four connecting portions 23C [2k-1] (hereinafter simply “connecting portion 22C”). , but not connected to the four front plate-like portions 32C [2k] or the four rear plate-like portions 33C [2k]. Therefore, the structure 20C of the modification has a shape (connection The distance between two laterally adjacent connecting portions 22C and the distance between two laterally adjacent connecting portions 22C and 22C are smaller than those of the structure 20B. 23C becomes longer.

In the structural body 20C of the modified example, similarly to the structural body 20A of the embodiment and the structural body 20B of the first comparative example, vertical bending has lower rigidity than forward-backward bending, lateral expansion and contraction, and lateral twisting.

In the structural body 20C of the modified example described above, each of the front and rear plate-shaped portions 31C of the first structure 30C has a hole 31Ca, so that all connections from the structural body 20B of the first comparative example are made at the central portion in the front-rear direction. It has a shape in which the portion 21B is removed. In addition, since the second structure 40 has a plurality of recesses 40Ca and a plurality of recesses 40Cb, the structure 20C has a front end portion and a rear end portion in the front-rear direction. It has a shape in which every other piece is removed, and the distance between two connecting portions 22C adjacent in the left-right direction and the distance between two connecting portions 23C adjacent in the left-right direction are longer than in the structure 20B. . As a result, when a vertical bending load is applied to the structural bodies 20C and 20B of the modified example and the first comparative example, the structural body 20C has a lower connection portion at the central portion in the front-rear direction than the structural body 20B. By not having a It is possible to suppress relatively large increases in stress and stiffness due to the long distance between the two mating connecting portions 23C. The inventors confirmed this by analysis. As a result, the structural body 20C can be deformed into a desired shape by longitudinal bending while suppressing damage in vertical bending as compared with the structural body 20B.

In the structural body 20C of the modified example, every other connecting portion 22B and the connecting portion 23B are left and removed from the structural body 20B of the first comparative example at the front end portion and the rear end portion in the front-rear direction. However, it is not limited to this. For example, the structure 20B may have a shape in which the connection portions 22B and the connection portions 23B are left every two or three, respectively, and the remainder is removed.

In the structure 20A of the embodiment, at the front end portion in the front-rear direction, the length of each connection portion 22A in the left-right direction is shorter than that of the structure 20B. The distance between them was assumed to be long. In addition, in the structural body 20C of the modified example, every other connecting portion 22B is removed from the structural body 20B at the front end portion in the front-rear direction. It is assumed that the distance between the two connection portions 22C is long. However, the length of each connection portion 22A in the left-right direction is shorter than that of the structure 20B, and the connection portions 22B are removed from the structure 20B every other connection portion. may be The same applies to the rear ends of the structures 20A and 20C in the front-rear direction.

In the structures 20A and 20C of the embodiment and the modified example, the first structures 30A and 30C and the second structures 40A and 40C are aligned with the axis L1 of the first structures 30A and 30C and the axis L2 of the second structures 40A and 40C, respectively. Although it is assumed that the shape is formed in such a manner that the two are matched with each other, it is not limited to this. For example, the first structures 30A, 30C and the second structures 40A, 40C are formed in a combined shape such that the upper ends of the first structures 30A, 30C are aligned with the upper ends of the second structures 40A, 40C. It can be a thing.

In the structures 20A and 20C of the embodiment and the modified example, the first structures 30A and 30C in the shape of square waves extending in the front-rear direction and extending in the left-right direction while twisting, and the first structures 30A and 30C extending in the front-rear and left-right directions are shaped like flat plates. , the second structures 40A and 40C are combined, but the present invention is not limited to this. For example, each of the first structures 30A and 30C may have a wave shape other than a rectangular wave shape, such as a sinusoidal wave shape or a triangular wave shape that extends in the left-right direction while winding, or may have a spiral shape that extends in the left-right direction. It can be a thing. Moreover, in the case of a wave shape, the period and amplitude thereof are not limited to a constant value, and may be changed randomly, for example. In the case of a helical shape, the pitch is not limited to a constant value. For example, it may be changed randomly. Conceivable. Furthermore, even if the second structures 40A and 40C are inclined plus or minus 10 degrees, 20 degrees, or 30 degrees in the front-rear direction or the left-right direction with respect to the planes extending in the front-rear direction and the left-right direction, respectively. good. In addition, each of the second structures 40A and 40C may have a plate-like shape with a curvature instead of a flat plate-like shape (with zero curvature).

In the structural bodies 20A and 20C of the embodiment and the modified examples, the wave-like (specifically, serpentine-like) first structures 30A and 30C and the flat plate-like second structures 40A and 40C are combined. It is intended to be formed, but is not so limited. For example, the second structures 40A and 40C may be formed in a wavy shape similar to the first structure 30 instead of being flat.

FIG. 16 is an external perspective view of a structural body 120A of a modified example, and FIG. 17 is an external perspective view of a structural body 120B of a second comparative example. 18 is an external perspective view of the first structure 130, and FIG. 19 is an external perspective view of the second structure 140. FIG. The left-right direction, the front-rear direction, and the up-down direction are as shown in FIGS. In FIG. 18, the axis L3 is a line connecting the center of the first structure 130 in the vertical direction and the front-rear direction at any position in the left-right direction. It is a line connecting the center of the structure 140 in the vertical direction and the front-rear direction at an arbitrary position in the left-right direction. Furthermore, in FIG. 16 and FIG. 17, only a part of each constituent element is indicated with a subscript for ease of viewing.

A structural body 120A of a modified example in FIG. 16 and a structural body (basic structure) 120B of a second comparative example in FIG. be. A first structure 130 in FIG. 18 and a second structure 140 in FIG. 19 are basic structures used for structures 120A and 120B. 18, the second structure 140 of FIG. 19, the structure 120B of the second comparative example of FIG. 17, and the structure 120A of the modified example of FIG. 16 will be described in this order for easy understanding. .

The first structure 130 of FIG. 18 will be described. As shown in the figure, the first structure 130 is formed in a serpentine shape extending in the left-right direction while being rectangular wave-like in the front-rear direction. The first structure 130 includes twenty front and rear plate-shaped portions 131[1] to 131[20] (hereinafter sometimes simply referred to as “front and rear plate-shaped portions 131”) and ten front plate-shaped portions 132[ 1] to 132 [10] (hereinafter sometimes simply referred to as the “front plate-shaped portion 132”) and ten rear plate-shaped portions 133 [1] to 133 [10] (hereinafter simply referred to as the “rear plate-shaped portion 133”).

The 20 front and rear plate-shaped portions 131[1] to 131[20] are each formed in a rectangular flat plate shape extending in the front-rear direction and having a constant thickness (length in the vertical direction) and width (length in the horizontal direction). They are arranged side by side at intervals in the left-right direction. In the modified example, the 20 front and rear plate-shaped portions 131[1] to 131[20] are all formed in the same shape, and each has length, width, and thickness in the front-rear direction from the longer side. .

Each of the ten front side plate-like portions 132[1] to 132[10] is formed in a rectangular flat plate shape extending in the left-right direction and having a constant thickness (length in the front-rear direction) and width (length in the vertical direction). It is The left ends of the front plate-shaped portions 132[m] (m: 1 to 10) are respectively connected to the front ends of the front and rear plate-shaped portions 131 [2m], and the front plate-shaped portions 132[n] (n: 1 to 9) are connected to the front ends of the front and rear plate-like portions 131 [2n+1], respectively. In the modified example, the ten front side plate-shaped portions 132[1] to 132[10] are all formed in the same shape, and each has a length, width, and thickness in the left-right direction from the longer side. .

Each of the ten rear plate-like portions 133[1] to 133[10] is formed in a rectangular flat plate shape extending in the left-right direction and having a constant thickness (length in the front-rear direction) and width (length in the vertical direction). It is The left ends of the rear plate-shaped portions 133[m] (m: 1 to 10) are respectively connected to the rear ends of the front and rear plate-shaped portions 131[2m-1], and the right ends of the rear plate-shaped portions 133[m]. are connected to the rear ends of the front and rear plate-like portions 131 [2m], respectively. In the modified example, the ten rear plate-like portions 133[1] to 133[10] are all formed in the same shape as the ten front plate-like portions 132[1] to 132[10]. The length, width, and thickness in the left-right direction are in order from the longer side.

The first structure 130 as a whole is designed so that vertical bending and twisting around a horizontal axis have lower rigidity than longitudinal bending and horizontal expansion and contraction. The reference state of the first structure 130 is the state shown in FIG.

Next, the second structure 140 of FIG. 19 will be described. As shown, the second structure 140 has a shape obtained by rotating the first structure 130 clockwise by 90 degrees about the axis L3 as viewed from the left side of FIG. That is, the second structure 140 is formed in a zigzag shape extending in the left-right direction while winding in a rectangular wave shape in the up-down direction. 20], 10 front side plate-like portions 132[1] to 132[10], and 10 rear side plate-like portions 133[1] to 133[10] (shapes rotated 90 degrees) respectively corresponding to , 20 upper and lower plate-shaped portions 141 [1] to 141 [20], 10 lower plate-shaped portions 142 [1] to 142 [10], 10 upper plate-shaped portions 143 [1] to 143 [10] ].

The second structure 140 as a whole is designed to have lower rigidity in front-rear bending and torsion around a left-right axis than in up-down bending and left-right expansion/contraction. The reference state of the second structure 140 is the state shown in FIG.

Next, the structure 120B of the second comparative example shown in FIG. 17 will be described. As illustrated, in the structure 120B of the second comparative example, the first structure 130 of FIG. 18 and the second structure 140 of FIG. It is formed into a simple combined shape to match. Therefore, the structure 120B of the second comparative example includes a first structure 130B and a second structure 140B having shapes corresponding to (similar to) the first structure 130 and the second structure 140, respectively.

The first structure 130B includes twenty front and rear plate-like portions 131[1] to 131[20], ten front plate-like portions 132[1] to 132[10], and ten rear plates of the first structure 130. 20 front and rear plate-like portions 131B[1] to 131B[20] and 10 front plate-like portions 132B[1] having shapes corresponding to (or similar to) the shape portions 133[1] to 133[10]. 132B[10] and ten rear plate-like portions 133B[1] to 133B[10].

The second structure 140B includes 20 upper and lower plate-like portions 141[1] to 141[20], 10 lower plate-like portions 142[1] to 142[10], and 10 upper plates of the second structure 140. 20 upper and lower plate-like portions 141B[1] to 141B[20] and 10 lower plate-like portions 142B[1] having shapes corresponding to (or similar to) the shape portions 143[1] to 143[10] 142B[10] and ten upper plate-like portions 143B[1] to 143B[10].

In the structure 120B of the second comparative example, as shown in FIG. 17, 20 front and rear plate-like portions 131B[1] to 131B[20] of the first structure 130B and 20 upper and lower plate-like portions of the second structure 140B are arranged. Portions 141B[1] to 141B[20] are connected by 20 connection portions 121B[1] to 121B[20] (hereinafter sometimes simply referred to as "connection portions 121B"). Therefore, in the structure 120B, 20 connecting portions 121B appear at intervals along the horizontal direction. In the structural body 120B, the distance between two adjacent connection portions 121B in the horizontal direction is equal to the distance between two adjacent front and rear plate-shaped portions 131B and the distance between two adjacent upper and lower plate-shaped portions 141B. .

In the structure 120B of the second comparative example, the first structure 130 (130B) having lower rigidity in vertical bending and torsion around the lateral axis than in the longitudinal bending and lateral expansion and contraction, and the longitudinal bending and torsion around the lateral axis in vertical bending and Since the second structure 140 (140B), which has a low rigidity compared to lateral expansion and contraction, is formed in a shape simply combined, the first and second structures 130B, 140B have a relatively low rigidity in common. Torsion around the axis has lower rigidity than bending back and forth, bending left and right, and expanding and contracting left and right.

Next, the structure 120A of the modified example of FIG. 16 will be described. As illustrated, the structural body 20C of the modified example is formed in a shape based on the structural body 120B of the second comparative example (a shape partially modified). The modified structure 120A comprises a first structure 130A and a second structure 140A shaped based on the first structure 130B and the second structure 140B.

The first structure 130A has 20 front and rear plate-like shapes (partially modified shapes) based on the 20 front and rear plate-like portions 131B[1] to 131B[20] of the first structure 130B of the structure 120B. Shapes ( 10 front plate-like portions 132A[1] to 132A[10] and 10 rear plate-like portions 133A[1] to 133A[10] of the same shape).

As shown in FIG. 16, ten front and rear plate-like portions 131A [2m] (m: 1 to 10) of the first structure 130A each have a concave portion 131Aa and a narrow portion 131Ab. It is different from the ten front and rear plate-like portions 131B [2 m] of the one structure 130B. Each recess 131Aa is formed so as to be recessed in a rectangular shape to the right from the left end surface at the central portion in the front-rear direction. Here, the depth (the length in the left-right direction) of the concave portion 131Aa is deeper than half the width (the length in the left-right direction) of the front and rear plate-like portions 131A [2 m]. The narrow portion 131Ab is a portion of the front and rear plate-like portion 131A [2 m] whose width is narrowed by the recess 131Aa.

The second structure 140A is composed of 20 upper and lower plate-like shapes based on the 20 upper and lower plate-like portions 141B[1] to 141B[20] of the second structure 140B of the structural body 120B (shapes partially modified). Shapes ( 10 lower plate-like portions 142A[1] to 142A[10] and 10 upper plate-like portions 143A[1] to 143A[10] of the same shape).

Ten upper and lower plate-like portions 141A [2m] (m: 1 to 10) of the second structure 140A each have a concave portion 141Aa and a narrow portion 141Ab. It is different from the upper and lower plate-like portions 141B [2m]. Each recess 141Aa is formed so as to be recessed in a rectangular shape to the left from the right end face at the central portion in the vertical direction. Here, the depth (horizontal length) of the concave portion 141Aa is deeper than half the width (horizontal length) of the upper and lower plate-like portions 141A [2 m]. The narrow portion 141Ab is a portion of the upper and lower plate-like portions 141A [2m] whose width is narrowed by the recess 141Aa.

The inner wall surfaces of the recessed portions 131Aa of the front and rear plate-like portions 131A [2m] (m: 1 to 10) of the first structure 130A are the front end surfaces of the narrow portions 141Ab of the upper and lower plate-like portions 141A [2m] of the second structure 140A. It faces the right end face and the rear end face with a gap. In addition, the inner wall surface of the concave portion 141Aa of the upper and lower plate-like portions 141A [2m] of the second structure 140A is the upper end surface, the left end surface, and the lower end surface of the narrow portion 131Ab of the front and rear plate-like portions 131A [2m] of the first structure 130A. are facing each other at a distance. As a result, in the structure 120A, ten front and rear plate-like portions 131A [2m-1] of the first structure 130A and ten upper and lower plate-like portions 141A [2m-1] of the second structure 140A are divided into ten 10 front and rear plate-like portions 131A [2m] of the first structure 130A and the ten front plate-like portions 131A [2m] of the second structure 140A are connected by the connection portion 121A [2m−1] (hereinafter sometimes simply referred to as “connection portion 121A”). It is not connected to the ten upper and lower plate-like portions 141A [2m]. Therefore, the structure 120A of the modified example has a shape obtained by removing ten connection portions 121B [2 m] from the structure 120B of the second comparative example (a shape obtained by removing every other connection portion 121B). Compared to the body 120B, the distance between two connecting portions 121A adjacent in the left-right direction is longer.

In the structural body 120A of the modified example, similarly to the structural body 120B of the second comparative example, the torsion around the lateral axis has lower rigidity than the longitudinal bending, lateral bending, and lateral expansion/contraction.

In the structural body 120A of the modified example described above, the ten front and rear plate-like portions 131A [2m] (m: 1 to 10) of the first structure 130A each have a concave portion 131Aa and a narrow portion 131Ab, and the second structure Ten upper and lower plate-like portions 141A [2m] of 140A each have a recessed portion 141Aa and a narrow portion 141Ab, so that ten connecting portions 121B [2m] are removed from the structural body 120B of the second comparative example. That is, every other connecting portion 121B is removed, and the distance between two connecting portions 121A adjacent in the horizontal direction is longer than in the structure 120B. As a result, when a vertical bending load is applied to the structural bodies 120A and 120B of the modified example and the second comparative example, in the structural body 120A, compared to the structural body 120B, two connecting portions adjacent in the left-right direction It is possible to suppress relatively large increases in stress and stiffness due to the long distance between 121A. The inventors confirmed this by analysis. As a result, the structure 120A can be deformed into a desired shape by twisting around the left-right axis while suppressing damage compared to the structure 120B by bending back and forth.

The structural body 120A of the modified example has a shape in which every other connection portion 121B is left and removed from the structural body 120B of the second comparative example, but the structure is not limited to this. For example, the structure 120B may have a shape in which every two or three connecting portions 121B are left and the remainder is removed.

In the structure 120A of the modified example, the first structure 130A has a serpentine shape that extends in the left-right direction while winding in a rectangular wave shape in the front-rear direction, and the first structure 130A that extends in the left-right direction while making a rectangular wave shape in the up-down direction. Although the second structure 140A is formed in a shape combined with the second structure 140A, it is not limited to this. For example, the first structure 130A and the second structure 140A may have a wave shape other than a rectangular wave shape, such as a sinusoidal wave shape or a triangular wave shape, extending in the left-right direction while winding. Further, the wave-like period and amplitude of the first structure 130A and the second structure 140A are not limited to a fixed value, and may be changed randomly, for example.

The structures 20A, 20C, and 120A of the embodiments and modifications are configured as integrally molded members integrally molded from a resin material, a rubber material, a metal material, or the like. However, it may also be formed as a plurality of parts and joined together. For example, for the structural body 20A, the upper portion and the lower portion of the first structure 30A from the second structure 40A are molded, the second structure 40B is molded, and these are joined to form the structural body 20A. It can be a thing.

The correspondence relationship between the main elements of the examples and the main elements of the present disclosure described in the column of Means for Solving the Problems is Since it is an example for specifically explaining the mode for carrying out the above, it does not limit the elements of the present disclosure described in the column of means for solving the problem. That is, the interpretation of the present disclosure described in the column of Means for Solving the Problems should be based on the description in that column, and the Examples are based on the book described in the column of Means for Solving the Problems. It is only a specific example of disclosure.

As described above, the mode for carrying out the present disclosure has been described using examples. Of course, it can be implemented.

[Appendix]
In the structure of the present disclosure, a first structure extending in a predetermined direction in a first repeated shape and a plate-like or second structure extending in the predetermined direction in a second repeated shape are arranged along the predetermined direction. A structure having a shape based on a basic structure having a shape combined so that a plurality of connecting portions appear at intervals, wherein the structure is adjacent to the basic structure in the predetermined direction compared to the basic structure. The gist is that the two connection portions are formed in a shape in which the distance between the two connection portions is long.

The structure of the present disclosure is formed in a shape in which the distance between two adjacent connection portions in a predetermined direction is longer than that of the basic structure. As a result, when deformed in a specific deformation mode, it is possible to suppress a relatively large increase in stress and stiffness locally, specifically between two connecting portions adjacent in a predetermined direction. can. As a result, it becomes possible to deform into a desired shape while suppressing damage. Here, as the "first repeating shape" and the "second repeating shape", for example, a wave shape such as a rectangular wave shape, a sine wave shape, a triangular wave shape, a spiral shape, and the like can be mentioned.

In the structure of the present disclosure, the structure is adjacent to the basic structure in the predetermined direction because the length of the connecting portion in the predetermined direction is shorter than that of the basic structure. It may be formed in a shape in which the distance between the two connection portions is long. In this case, the second structure is in the shape of a plate, and the structure has an end face in the predetermined direction with respect to the first structure of the basic structure, and the structure is arranged around the second structure in the predetermined direction. By providing a first concave portion that is recessed into the base structure, the connection portion may be formed in a shape in which the length in the predetermined direction is shorter than that of the basic structure.

In the structure of the present disclosure, the structure is adjacent to the basic structure in the predetermined direction by having a shape in which a part of the plurality of connecting portions of the basic structure is removed. It may be formed in a shape in which the distance between the two mating connecting portions is long. In this case, the second structure is plate-shaped, and the structure is provided with a second concave portion for avoiding connection with the first structure with respect to the second structure of the basic structure. A part of the plurality of connection portions of the basic structure may be removed by forming the base structure. In addition, the first repeating shape and the second repeating shape are both wavy, and the structure has a wavy shape with respect to the first structure of the basic structure in order to avoid connection with the second structure. and the second structure of the basic structure is provided with a fourth recess for avoiding connection with the first structure, whereby the plurality of It is also possible to form a shape in which a part of the connecting portion is removed.

In the structure of the present disclosure, the first repeated shape is a wave shape, the second structure is a plate shape, and the basic structure has the connecting portion extending in a second direction different from the predetermined direction. By extending in the predetermined direction while undulating in the wavy shape, the plurality of connection portions appear at intervals along the predetermined direction at any position in the second direction, and the structure is formed in the second direction. The central portion in the direction is formed in a shape in which the connection portion is removed from the basic structure along the predetermined direction. , the distance between two adjacent connecting portions in the predetermined direction may be longer than that of the basic structure.

In the structure of the present disclosure, the structure may be a unitary molded member.

20A, 20B, 20C, 120A, 120B structure 21B, 22A, 22B, 22C, 23A, 23B, 23C, 121A, 121B connection portion 30, 30A, 30B, 30C, 130, 130A, 130B first structure 40 , 40A, 40B, 40C, 140, 140A, 140B second structure.

Claims (5)

A first structure extending in a predetermined direction in a first repeated shape and a second structure in a plate shape or extending in a second repeated shape in the predetermined direction are arranged such that a plurality of connecting portions are spaced apart along the predetermined direction. A structure of shapes that are combined so as to appear after
The second structure is the plate-like shape,
The first structure is provided with a first recess recessed in the predetermined direction from the periphery of the second structure in the end face in the predetermined direction toward the second structure.
Structure. A first structure extending in a predetermined direction in a first repeated shape and a second structure in a plate shape or extending in a second repeated shape in the predetermined direction are arranged such that a plurality of connecting portions are spaced apart along the predetermined direction. A structure of shapes that are combined so as to appear after
The second structure is in the shape of a plate, and further includes second recesses for avoiding connection with the first structure, provided at intervals along the predetermined direction.
Structure. A first structure extending in a predetermined direction in a first repeated shape and a second structure in a plate shape or extending in a second repeated shape in the predetermined direction are arranged such that a plurality of connecting portions are spaced apart along the predetermined direction. A structure of shapes that are combined so as to appear after
Both the first repeating shape and the second repeating shape are wavy,
The first structure includes a third recess recessed in the predetermined direction from an end face in the predetermined direction in order to avoid connection with the second structure, and the third recess when viewed in the extending direction of the first repeating shape. a first narrow portion having a shorter length in the predetermined direction than a portion having no recess, and a first narrow portion spaced apart along the predetermined direction;
The second structure includes a fourth concave portion recessed in the predetermined direction from an end face in the predetermined direction to avoid connection with the first structure, and the fourth concave portion recessed in the predetermined direction from the end face in the predetermined direction, and the fourth concave portion when viewed in the extending direction of the second repeating shape. a second narrow portion having a shorter length in the predetermined direction than a portion having no recess, and a second narrow portion spaced apart along the predetermined direction;
an inner wall surface of the third recess surrounds a part of the second narrow portion with a space therebetween;
The inner wall surface of the fourth recess surrounds a part of the first narrow portion with a space therebetween,
Structure. A structure according to claim 1 or 2 ,
The first repeating shape is a wave shape extending in the predetermined direction while undulating in a second predetermined direction different from the predetermined direction ,
The second structure is the plate-like shape,
The structure is
In the central portion in the second predetermined direction , without having the connecting portion along the predetermined direction,
On one side and the other side of the central portion in the second predetermined direction, each of the plurality of connecting portions is formed in a shape having intervals along the predetermined direction ,
Structure. A structure according to any one of claims 1 to 3 ,
wherein the structure is a unitary molded member;
Structure.

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