JP7613490B2 - Bonding Structure and Design System - Google Patents

Description

The present invention relates to a bonding structure and a design system.

There is known a technique for joining a plurality of members together by welding or the like (see, for example, Patent Document 1).
In the vehicle body structure described in Patent Document 1, a vertical plate is joined to the joint between the lower part of the center pillar and the side sill. Joining the vertical plate suppresses deformation of the vehicle body due to loads in the front-rear, up-down, and diagonal directions. Patent Document 2 describes a method of easily fastening multiple members using snap fits without increasing the number of parts.

JP 2017-039338 A JP 2018-131118 A

In the vehicle body structure described in Patent Document 1, a vertical plate is added as a reinforcing structure to the inside of the center pillar and the side sill to improve rigidity. However, since the vertical plate, which is a large pressed product, is joined to the center pillar and the side sill by welding, it is difficult to dismantle such a structure. In the fastening using a snap fit described in Patent Document 2, it is not easy to remove the claw for releasing the fastening. Furthermore, if the snap fit is repeatedly fastened and released, the claw may be damaged, making it impossible to perform the fastening.

The present invention has been made to solve at least some of the above-mentioned problems, and aims to provide a bonded structure that is easily removable and reusable, and that does not change the material properties of the components being bonded.

The present invention has been made to solve at least part of the above-mentioned problems, and can be realized in the following forms.

(1) According to one aspect of the present invention, there is provided a connection structure for connecting a first member and a second member, the connection structure including a first fixing part fixed to the first member, a second fixing part fixed to the second member, a connecting elastic body formed of an elastic member and connected to the first fixing part and the second fixing part, the connecting elastic body being capable of changing a distance between the first fixing part and the second fixing part by expanding and contracting due to elastic deformation along a first direction connecting the first fixing part and the second fixing part, and a reinforcing structure that restricts the expansion and contraction of the connecting elastic body due to elastic deformation along the first direction by stretching the connecting elastic body in a second direction intersecting the first direction.

According to this configuration, while the connecting elastic body is in a state in which it is elastically deformable along the first direction, the first fixing portion is fixed to the first member, and the second fixing portion is fixed to the second member, and then the reinforcing structure is attached to the connecting elastic body, so that the elastic deformation of the connecting elastic body in the first direction is restricted. The tension according to the expansion and contraction of the connecting elastic body due to the restriction of the reinforcing structure functions as a force for fixing the first member and the second member. When releasing the fixation of the first member and the second member, the procedure of fixing is reversed, that is, after removing the reinforcing structure from the connecting elastic body, the connecting elastic body is stretched along the first direction to release the fixation of the first fixing portion and the second fixing portion. According to this configuration, the first member and the second member can be repeatedly fixed and released by the simple operation of removing the reinforcing structure from the connecting elastic body and releasing the first fixing portion and the second fixing portion. That is,
By using this configuration, a reusable bonded structure in which the first member and the second member can be detached can be realized. In addition, the first member and the second member can be fixed and released without damaging the first member and the second member or changing the material properties of the members to be bonded, such as by heating.
It is possible to connect multiple components. Furthermore, this configuration allows the addition of a connecting structure from the outside of the components to be connected, making it easy to repair or upgrade by replacing parts of the components. The ease of replacing parts of the components makes it possible to set up centralized planning and common module areas for high-mix, low-volume production.

(2) In the connection structure of the above aspect, the connecting elastic body has a ring shape, the first fixing portion and the second fixing portion are arranged in positions facing each other via the connecting elastic body, and the first direction and the second direction may be perpendicular to each other.
According to this configuration, since the first fixing portion and the second fixing portion are disposed at opposing positions in the ring shape, the first member and the second member are fixed and released by the connection elastic body expanding and contracting along the first direction connecting the first fixing portion and the second fixing portion.
In comparison with a case where the fixing portion and the second fixing portion are arranged at positions not facing each other in the ring shape, the extension margin during deformation along the first direction is maximized, and the tension during fixing of the first member and the second member is maximized. Therefore, the force with which the connecting structure connects the first member and the second member can be maximized. In addition, since the amount of extension of the connecting elastic body along the first direction is maximized, fixing and releasing of the first member and the second member can be easily performed.

(3) In the connected structure of the above aspect, the reinforcing structure may be a rigid body that is detachable from the connecting elastic body, and may be attached to the inside of the ring shape of the connecting elastic body to regulate the expansion and contraction of the connecting elastic body due to elastic deformation along the first direction.
According to this configuration, the reinforcing structure is attached to the inside of the ring-shaped connecting elastic body to restrict elastic deformation. Since the reinforcing structure is a rigid body, the elastic deformation of the connecting elastic body is restricted by all of the parts in contact with the connecting elastic body. Therefore, for example, by a method in which a part of the reinforcing structure is fixed, a restricting force is applied in a balanced manner to the entire connecting elastic body, rather than applying a restricting force to a fixed part of the connecting elastic body. As a result, damage to the connecting elastic body can be suppressed, and the life of the connection structure can be extended, increasing the number of times it can be reused.

(4) In the combined structure of the above aspect, the reinforcing structure has a first reinforcing part detachably fixed to one of the first member and the second member, and a second reinforcing part detachably fixed to one of the first member and the second member, and the first reinforcing part and the second reinforcing part are
The reinforcing portions are connected to the connecting elastic bodies and face each other via the connecting elastic bodies,
Furthermore, a line connecting the first reinforcement portion and the second reinforcement portion may be positioned along the second direction, and the first reinforcement portion and the second reinforcement portion may be fixed to one of the first member and the second member, thereby regulating expansion and contraction due to elastic deformation of the connecting elastic body along the first direction.
According to this configuration, the ring-shaped connecting elastic body is stretched in a second direction different from the first direction,
The elastic body is fixed to the first reinforcing part and the second reinforcing part, so that the elastic body is restricted from stretching in the first direction, and the tension of the elastic body, which is the contracting force of the ring shape of the elastic body, functions as a force for fixing the first member and the second member together.

(5) In the bonded structure of the above aspect, the reinforcing structure includes a plurality of annular elastic bodies.
The first and second directions may be arranged side by side on a plane including the first direction and the second direction.
According to this configuration, instead of one large ring-shaped connecting elastic body, one connecting elastic body is formed by multiple annular elastic bodies. Therefore, instead of manufacturing connecting elastic bodies and reinforcing structures having unique shapes according to the application, it is possible to manufacture connecting elastic bodies and reinforcing structures by combining multiple annular elastic bodies of the same shape according to the application. This reduces the manufacturing cost of the connecting structure and makes it easy to manufacture the connecting structure.

(6) According to another aspect of the present invention, there is provided a design system for a joint structure for joining a first member and a second member. The design system includes a first fixing part fixed to the first member, a second fixing part fixed to the second member, and a connecting elastic body formed of an elastic member and connected to the first fixing part and the second fixing part, respectively, and the first fixing part and the second fixing part are connected to each other.
The first fixed portion and the second fixed portion are elastically deformed in a first direction along which the fixed portions are joined, and the elastic deformation causes the first fixed portion and the second fixed portion to expand and contract.
the connecting elastic body having a distance from a fixed part that can be changed; and a design part that uses an input value input to the input part to calculate the tension to be applied along the first direction when the first member and the second member are joined using a force that stretches the connecting elastic body in a second direction that intersects the first direction, and designs a shape of the reinforcement structure optimized to obtain the calculated force that stretches the connecting elastic body in the second direction.
With this configuration, the user can easily design the shape of the reinforcing structure for connecting the first member and the second member.

The present invention can be realized in various forms, for example, in the form of a connected structure, a fixing member, a design device for a connected structure, a structure connecting method, a fixing method, a design method for a connected structure, a system including these devices or realizing these methods, a computer program for executing these devices or methods, a server device for distributing this computer program, a non-transitory storage medium on which a computer program is stored, etc.

1 is a schematic perspective view of a structure joined by a joining member according to one embodiment of the present invention; FIG. 2 is an exploded perspective view of a first member and a second member. FIG. FIG. 4 is a schematic front view of a reinforcing member. 4 is a schematic front view of a connecting elastic body, a first fixing portion, and a second fixing portion. FIG. 4 is a schematic side view of a connecting elastic body, a first fixing portion, and a second fixing portion. FIG. 13 is a schematic front view of the connecting elastic body in a state where the connecting elastic body is stretched in the negative Z-axis direction. FIG. 13 is a schematic front view of the connecting elastic body in a state in which the second fixing portion is fixed to the second engaging portion of the second member. FIG. 13 is a schematic front view of a state in which a reinforcing member is attached to the inside of a connecting elastic body. FIG. FIG. 11 is a schematic perspective view of a structure according to a second embodiment. FIG. 11 is a schematic front view in which a portion A1 shown in FIG. 10 is enlarged. FIG. 12 is a schematic diagram of the B1 cross section shown in FIG. 11 . FIG. 11 is a schematic front view of a connecting elastic body of the third embodiment in an unstretched state. FIG. 13 is a schematic front view of a connecting elastic body in a stretched state according to a third embodiment. FIG. 1 is a block diagram of a design system for designing the shape of a reinforcing member. FIG. 13 is a schematic front view of a connecting member according to a first modified example. 13 is a schematic front view of a connecting elastic body in a stretched state along the Z-axis direction. FIG. FIG. 11 is a schematic perspective view of a structure of a modified example 2. FIG. 11 is a schematic front view of a connecting elastic body of modified example 3 in an unstretched state. FIG. 11 is a schematic front view of a connecting elastic body of modified example 3 in a stretched state. FIG. 13 is a schematic perspective view of a structure of a modified example 4. FIG. 13 is a schematic perspective view of a structure of modified example 5.

First Embodiment
FIG. 1 is a schematic perspective view of a structure 100 joined by a joining member 10 according to an embodiment of the present invention. As shown in FIG. 1, the structure 100 includes a first member 20.
The first member 20 and the second member 30 are provided with a second member (second structure) 30, and a connecting member (connecting structure) 10 that connects the first member 20 and the second member 30. In this embodiment, the first member 20 and the second member 30 are connected to each other by the connecting member 10 from the outside of the first member 20 and the second member 30.
When assembling the first member 20 and the second member 30, the connecting member 10 utilizes the elongation of elastic deformation, and when fixing the first member 20 and the second member 30 after assembly, the connecting member 10 uses a tension that restricts the elastic deformation of the connecting member 10 to fix them. Therefore, by using the connecting member 10 that utilizes elastic deformation of this embodiment, the first member 20 and the second member 30 can be easily removed, and the connecting member 10 can be reused. Furthermore, even when the connecting member 10 is connected and released, the first member 20
And without damaging the second member 30 , the joining member 10 can join the first member 20 and the second member 30 without changing the material properties of the first member 20 and the second member 30 .

Fig. 2 is an exploded perspective view of the first member 20 and the second member 30. As shown in Fig. 2, the first member 20 has a rectangular parallelepiped shape with some faces missing. The first member 20 of this embodiment is formed of a metallic material such as iron or aluminum. Note that Fig. 2 also shows an orthogonal coordinate system C, which is formed of X, Y, and Z axes parallel to each side of the first member 20 having a substantially rectangular parallelepiped shape.
S is shown. The orthogonal coordinate system CS shown in Fig. 2 corresponds to the orthogonal coordinate system CS shown in Fig. 1 and Fig. 3 onwards.

The first member 20 has an engagement surface 21, side surfaces 22 and 23 connected to the engagement surface 21, and a
The engagement surface 21, the side surfaces 22 and 23, and the back surface 25 are rectangular surfaces extending in the negative direction of the Z axis from the bottom surface 24, which is parallel to the XY plane.
The length of extension toward the negative Z-axis direction at the engagement surface 21 and the engagement surface 22 is the same. A first engagement portion 21H, which is a rectangular opening, is formed in a part of the engagement surface 21 opposite the bottom surface 24.
A first fixing portion 16 (FIG. 3) of a coupling member 10, which will be described later, engages with 1H.

The length of the side surface 22 and the side surface 23 extending toward the negative Z-axis direction side are the same, and the engagement surface 2
The length of the engagement surface 21 and the back surface 25 extending in the negative direction of the Z axis is longer than the length of the engagement surface 21 and the back surface 25 extending in the negative direction of the Z axis.
As shown in FIG. 1, the portions of the side surfaces 22 and 23 extending further toward the negative Z-axis direction side are slits 34H2, 34H3, 36H2, and 36H3 formed as openings in a second member 30, which will be described later.
Insert 6H3.

The second member 30 has a rectangular parallelepiped shape with an opening formed in a portion thereof. The second member 30 of the present embodiment is made of a metallic material such as iron or aluminum. The second member 30 is a YZ
Bottom surfaces 32 and 33 are parallel to the plane and are located at both ends along the X-axis, and an insertion surface 34 is connected to the bottom surfaces 32 and 33, is located in the positive direction of the Z-axis, and has a surface parallel to the XY plane.
the insertion surface 34 and the engagement surface 36, a front surface 31 connected to the insertion surface 34 and the engagement surface 36, positioned on the negative Y-axis direction side and having a surface parallel to the ZX plane, and a back surface 35 opposite the front surface 31.

Two rectangular slits 34H2 and 34H3 are formed in the insertion surface 34. The slit 34H2 is a rectangular opening extending along the Y axis. The slit 34H2 has an area larger than the cross section of the side surface 22 of the first member 20. The slit 34H3 is a rectangular opening extending along the Y axis.
The slit 34H2 has a central axis parallel to the Y axis, and the slit 34H3 has a central axis parallel to the Y axis.
The distance between the central axis parallel to the Y axis of the first member 20 and the side surface 23 of the first member 20 is the same as the distance between the side surface 22 and the side surface 23 of the first member 20.
23 are inserted into slits 34H2, 34H3 in the insertion surface 34 of the second member 30, respectively.

The engagement surface 36 has slits 36H having the same shape as the slits 34H2 and 32H3 of the insertion surface 34.
The first member 20 has slits 36H2 and 36H3 on the engagement surface 36, and a second engagement portion 36H1 which is an opening formed on the negative Y-axis direction side. The positions at which the slits 36H2 and 36H3 are formed on the engagement surface 36 are the same as the positions at which the slits 34H2 and 34H3 are formed on the insertion surface 34. The distance between the engagement surface 21 and the back surface 25 of the first member 20 is slightly smaller than the length of the insertion surface 34 along the Y-axis. Furthermore, the length from the lower ends of the engagement surface 21 and the back surface 25 of the first member 20 to the lower ends of the side surfaces 22 and 23 is greater than the distance from the insertion surface 34 of the second member 30 to the engagement surface 36. Therefore, when the first member 20 and the second member 30 are assembled, the side surfaces 22 and 23 of the first member 20 are inserted through the slits 34H2 and 34H3 of the insertion surface 34 of the second member, and then inserted through the slits 36H2 and 36H3 of the engagement surface 36. Thereafter, the lower ends of the engagement surface 21 and the back surface 25 of the first member 20 come into contact with the insertion surface 34, and the first member 20 and the back surface 25 are assembled in the state shown in FIG.

The second engagement portion 36H1 formed on the engagement surface 36 of the second member 30 is a rectangular opening extending along the X-axis. The second engagement portion 36H1 is a slit 36H
In the state shown in FIG. 1 in which the first member 20 and the second member 30 are assembled, the center of gravity of the first engagement portion 21H of the first member 20 and the center of gravity of the second engagement portion 36H3 are located between the first engagement portion 21H of the first member 20 and the second engagement portion 36H4.
A line connecting the second engagement portion 36H1 of the member 30 and the center of gravity is located on a plane substantially parallel to the YZ plane.

3 is a schematic front view of the connecting member 10. The connecting member 10 includes a first fixing portion 16 formed on the positive side of the Z axis, a second fixing portion 17 formed on the negative side of the Z axis, a ring-shaped connecting elastic body 14 connected to each of the first fixing portion 16 and the second fixing portion 17, and a reinforcing member (reinforcing structure) 11 attached to the inside of the ring shape of the connecting elastic body 14.

4 is a schematic front view of the reinforcing member 11. The reinforcing member 11 is made of a rigid body such as iron. The reinforcing member 11 is a member that can be attached to and detached from the connecting elastic body 14. The reinforcing member 11 is made up of an octagonal outer frame 12 and a plurality of beams 1 stretched around the inside of the octagon on the ZX plane.
4, a groove is formed in the outer frame 12 around the entire periphery, recessed toward the center of gravity of the octagon. The shape and thickness of the multiple beams 13 are determined by topology optimization. Details will be described later, but the reinforcing member 11 is attached to the inside of the ring-shaped connecting elastic body 14 by fitting the connecting elastic body 14 into the groove formed in the outer frame 12, that is, restricting expansion and contraction due to elastic deformation of the connecting elastic body 14.

5 is a schematic front view of the connection elastic body 14, the first fixing part 16, and the second fixing part 17. FIG. 6 is a schematic side view of the connection elastic body 14, the first fixing part 16, and the second fixing part 17. As shown in FIG. 5, the connection elastic body 14 has an octagonal shape slightly smaller than the reinforcing member 11 when the reinforcing member 11 is not attached. The connection elastic body 14 is formed of an elastic body that can stretch, such as resin. The first fixing part 16 and the second fixing part 17 are disposed in positions facing each other across the X-axis, with the connection elastic body 14 in between. Unlike the connection elastic body 14, the first fixing part 16 and the second fixing part 17 are formed of a rigid body that cannot stretch (for example, iron, aluminum, plastic, etc.).

The length of the first fixing portion 16 along the X-axis is smaller than the length of the first engaging portion 21H formed on the engaging surface 21 of the first member 20 along the X-axis. As shown in Fig. 6, the first fixing portion 16 includes an elastic body connecting portion 16A connected to the connecting elastic body 14 and extending in the positive direction of the Z-axis, a groove portion 16B connected to the elastic body connecting portion 16A and extending in the positive direction of the Y-axis, and a return portion 16C connected to the groove portion 16B and extending in the negative direction of the Z-axis.
6, the groove portion 16B and the return portion 16C form a groove shape recessed toward the positive direction of the Z axis.
It is engageable with the engaging portion 21H.

The length of the second fixing portion 17 along the X-axis shown in FIG. 5 is smaller than the length of the second engagement portion 36H1 formed on the engagement surface 36 of the second member 30 along the X-axis.
The fixing portion 17 includes an elastic body connecting portion 17A that is connected to the connecting elastic body 14 and extends toward the negative Z-axis direction.
a groove portion 17B connected to the elastic body connection portion 17A and extending toward the positive direction of the Y axis; and
The groove 17B has a length extending along the Y axis from the end of the engagement surface 36 of the second member 30 on the Y axis negative side to the end of the engagement surface 36 of the second member 30 on the Y axis negative side.
The distance is slightly longer than the distance to the end of the engaging portion 36H1 on the negative Y-axis direction side. As with the first fixing portion 16, the second fixing portion 17 has an elastic connection portion 17A, a groove portion 17B, and a return portion 17C, which form a groove shape in which the groove portion 17B is recessed toward the negative Z-axis direction side. Therefore, as described below, the second fixing portion 17 is capable of engaging with the second engaging portion 36H1 of the second member 30.

Each of Figs. 7 to 9 is an explanatory diagram when the first member 20 and the second member 30 are joined. Figs. 7 to 9 show schematic front views in which the joining member 10 and its surroundings are enlarged. Fig. 7 shows a state in which the first fixing portion 16 of the joining member 10 is fixed to the first engaging portion 21H of the first member 20 and the connecting elastic body 14 is stretched in the negative direction of the Z axis when the first member 20 and the second member 30 are joined. As shown in Fig. 7, in order to join the first member 20 and the second member 30, the first fixing portion 16 of the joining member 10 is engaged with the first engaging portion 21H of the first member 20, and then the second fixing portion 17 of the joining member 10 is pulled in the negative direction of the Z axis. The connecting elastic body 14 is fixed to the first engaging portion 21H of the first member 20.
Since the distance between first fixed portion 16 and second fixed portion 17 can be changed by elastic deformation along the Z-axis direction (first direction) connecting fixed portion 16 and second fixed portion 17, connecting elastic body 14 extends in the negative Z-axis direction as shown in Figure 7.

8 shows a state in which, in addition to the first fixing portion 16 of the coupling member 10, the second fixing portion 17 is fixed to the second engaging portion 36H1 (not shown) of the second member 30. In a state in which the first fixing portion 16 is fixed to the first engaging portion 21H and the second fixing portion 17 is fixed to the second engaging portion 36H1 shown in FIG. 8, the connecting elastic body 14 is expandable and contractable along the Z-axis direction, so that the first member 20 is movable along the Z-axis direction relative to the second member 30.

9 shows a state in which the reinforcing member 11 is attached to the inside of the connecting elastic body 14. When the reinforcing member 11 is attached to the connecting elastic body 14, the outer frame 12 of the reinforcing member 11 restricts the expansion and contraction of the connecting elastic body 14 over the entire circumference. In particular, the reinforcing member 11 is stretched in the X-axis direction (second direction) perpendicular to the Z-axis direction connecting the first fixing portion 16 and the second fixing portion 17 in which the connecting elastic body 14 was expandable and contractable before the reinforcing member 11 was attached. As a result, the reinforcing member 11 restricts the expansion and contraction of the elastic deformation of the connecting elastic body 14 along the Z-axis direction, and a joined structure 100 as shown in FIG. 1 is completed.

To release the bond of the structure 100 bonded by the bonding member 10 and disassemble it into the first member 20 and the second member 30, the process of bonding can be reversed. Specifically, the reinforcing member 11 is removed from the state shown in Fig. 9 to transition to the state shown in Fig. 8. Then, the second fixing portion 17 of the bonding member 10 is removed from the second engaging portion 36H1 (not shown in Figs. 7 to 9) of the second member 30 to transition to the state shown in Fig. 7. Then, the first engaging portion 36H1 of the bonding member 10 is removed from the second engaging portion 36H1 of the second member 30 to transition to the state shown in Fig. 7.
This can be achieved by removing the fixing portion 16 from the first engagement portion 21H of the first member 20. Note that when coupling and releasing, the order of coupling and releasing the first fixing portion 16 and the second fixing portion 17 may be reversed.

As described above, the connecting elastic body 14 of the connecting member 10 of the present embodiment has the first fixing portion 16 and the second fixing portion 17.
The distance between the first fixing portion 16 and the second fixing portion 17 can be changed by elastic deformation along the Z-axis direction (first direction) connecting the first fixing portion 16 and the second fixing portion 17. The reinforcing member 11 is capable of changing the distance between the first fixing portion 16 and the second fixing portion 17 by elastic deformation along the Z-axis direction (first direction) connecting the first fixing portion 16 and the second fixing portion 17 in which the connecting elastic body 14 was able to expand and contract before the reinforcing member 11 was attached.
The reinforcing member 11 is stretched in the X-axis direction (second direction) perpendicular to the axial direction. This allows the reinforcing member 11 to restrict the expansion and contraction of the elastic deformation of the connecting elastic body 14 along the Z-axis direction. In this embodiment, as shown in Figures 7 to 9, the first fixing portion 16 is fixed to the first member 20 and the second fixing portion 17 is fixed to the second member 30 in a state in which the connecting elastic body 14 is elastically deformable along the Z-axis direction. Thereafter, the reinforcing member 11 is attached to the connecting elastic body 14, thereby restricting the elastic deformation of the connecting elastic body 14 along the Z-axis direction.
The elastic deformation of the connecting elastic body 14 in the Z-axis direction is restricted by the reinforcing member 11.
The tension according to the expansion and contraction of the first member 20 functions as a force for fixing the first member 20 and the second member 30 together. When the first member 20 and the second member 30 are to be released from the fixed state, the procedure is reversed to that of the fixing procedure, that is,
After removing the reinforcing member 11 from the connecting elastic body 14, the connecting elastic body 14 is stretched along the Z-axis direction to release the fixing of the first fixing portion 16 and the second fixing portion 17.
In this embodiment, the first member 20 and the second member 30 can be repeatedly fixed and released by a simple operation of removing the reinforcing member 11 from the connecting elastic body 14 and releasing the first fixing portion 16 and the second fixing portion 17. That is, a connecting member 10 that is detachable and reusable between the first member 20 and the second member 30 can be realized. In addition, in fixing and releasing the first member 20 and the second member 30, a plurality of members can be connected without changing the material properties of the members to be connected, such as damage to the first member 20 and the second member 30 or heating. Furthermore, in this embodiment, since the connecting member 10 can be added from the outside of the members to be connected, repairs and upgrades can be easily performed by replacing a part of the member. By making it easy to replace a part of the member, it becomes possible to set a common module area and to plan a batch in a high-mix low-volume production.

In this embodiment, the connecting elastic body 14 has a ring shape and is connected to each of the first fixing portion 16 and the second fixing portion 17. The first fixing portion 16 and the second fixing portion 17 are disposed in positions facing each other across the X-axis, with the connecting elastic body 14 interposed therebetween.
Since the fixing portion 16 and the second fixing portion 17 are disposed at opposing positions in the ring shape, the connecting elastic body 14 expands and contracts along the Z-axis direction connecting the first fixing portion 16 and the second fixing portion 17. This causes the first member 20 and the second member 30 to be fixed and released. According to this embodiment,
Compared to a case where the first fixing portion 16 and the second fixing portion 17 are arranged at positions not facing each other in the ring shape, the extension margin during deformation along the Z-axis direction is maximized, and the tension during fixing of the first member 20 and the second member 30 is maximized. Therefore, the force with which the connecting member 10 connects the first member 20 and the second member 30 can be maximized. In addition, because the amount of extension of the connecting elastic body 14 along the Z-axis direction is maximized, it is easy to fix and release the first member 20 and the second member 30.

In addition, by being attached to the inside of the ring-shaped connecting elastic body 14, the reinforcing member 11 restricts the expansion and contraction caused by the elastic deformation of the connecting elastic body 14.
4 restricts the elastic deformation of the connecting elastic body 14. Therefore, for example, by a method in which a part of the reinforcing member 11 is fixed, a restricting force is applied in a balanced manner to the entire connecting elastic body 14, rather than applying a restricting force to a fixed part of the connecting elastic body 14. As a result, damage to the connecting elastic body 14 can be suppressed, the life of the structure 100 can be extended, and the number of times it can be reused can be increased.

Second Embodiment
10 is a schematic perspective view of a structure 100a of the second embodiment. The structure 100a of the second embodiment is different from the structure 100 of the first embodiment in that the joining member 10 does not include the reinforcing member 11, and that instead of the reinforcing member 11, a first reinforcing portion 1 disposed in a part of the connecting elastic body 14 is provided.
1A (FIG. 11) and the second reinforcing portion 11B restricts the expansion and contraction of the connecting elastic body 14. Therefore, in the second embodiment, the differences from the first embodiment will be described, and the description of the same configuration as the first embodiment will be omitted.

Fig. 11 is a schematic front view in which the portion A1 shown in Fig. 10 is enlarged. As shown in Fig. 11, a claw portion 31G is formed on the front surface 31a of the second member 30a of the second embodiment. A first reinforcing portion 11A is disposed on a part of the connection elastic body 14a of the joining member 10a of the second embodiment.

FIG. 12 is a schematic diagram of the B1 cross section shown in FIG. 11. As shown in FIG.
The front surface 31a of the member 30a includes a flat surface portion 31F and a claw portion 31G. The claw portion 31G includes a groove portion 31G1 extending from the flat surface portion 31F parallel to the ZX plane toward the positive direction of the Y axis, and a groove portion 31G
12, the groove 31G1 forms a groove shape recessed toward the negative X-axis direction by the flat portion 31F, the groove 31G1, and the return portion 31G2.

The first reinforcing portion 11A is formed in a part of the connecting elastic body 14a, and forms an elastically deformable portion that is thicker than the connecting elastic body 14a and has a circular cross section as shown in FIG.
The diameter of the cross section of the connecting elastic body 14a in which the elastic member 1A is disposed is slightly smaller than the distance between the flat portion 31F and the return portion 31G2 of the second member 30a.

As shown in Fig. 10, in the second member 30a of the second embodiment, a claw portion 31GG having the same shape is formed at a position on the front surface 31a opposite the claw portion 31G. The position where the claw portion 31GG is formed on the front surface 31a is a position that is line-symmetrical to the claw portion 31G across the YZ plane that passes through the center of gravity of the second engagement portion 36H1 formed on the engagement surface 36. In the joining member 10a of the second embodiment, the second reinforcing portion 11B is formed in the connecting elastic body 14a at a position opposite to the position where the first reinforcing portion 11A is disposed. The position where the second reinforcing portion 11B is formed is a position that is line-symmetrical to the first reinforcing portion 11A across the YZ plane that passes through the center of gravity of the connecting elastic body 14a.

As described above, the first reinforcing portion 11A and the second reinforcing portion 11B are respectively connected to the connecting elastic body 14a.
and are opposed to each other via the connecting elastic body 14a. The line connecting the first reinforcing portion 11A and the second reinforcing portion 11B is disposed in a position along the X-axis direction (second direction).
10, the first reinforcing portion 11A is fixed to the claw portion 31G of the second member 30a, and the second reinforcing portion 11B is fixed to the claw portion 31GG of the second member 30a, thereby restricting the expansion and contraction of the elastic deformation of the connecting elastic body 14a along the Z-axis direction.
By stretching the first reinforcing portion 11A to the claw portion 31G and fixing the second reinforcing portion 11B to the claw portion 31GG, the extension of the connecting elastic body 14a along the Z-axis direction is restricted. As a result, the tension, which is the force that contracts the ring shape of the connecting elastic body 14a, is applied to the first member 20 and the second member 3
It functions as a force to fix 0a.

Third Embodiment
13 and 14 are schematic front views of the connecting elastic body 14b of the third embodiment.
14 shows the connecting elastic body 14b, the first connecting member 14b, and the second connecting member 14b.
The fixing portion 16 and the second fixing portion 17 are shown. In the third embodiment, compared to the first embodiment, the connecting elastic body 14b is an annular member (annular elastic body) 14R which is two annular elastic bodies.
The third embodiment differs from the first embodiment in that it has annular members 14R and 14R2 and that the shapes of the reinforcing members are different to match the annular members 14R and 14R2. Therefore, in the third embodiment, only the differences from the first embodiment will be described, and a description of the same shapes and the like as in the first embodiment will be omitted.

Fig. 13 shows a state in which the elastic deformation of the connecting elastic body 14b is not restricted. As shown in Fig. 13, the connecting elastic body 14b includes an annular member 14R1 connected to the lower end side, or the negative Z-axis direction side, of the first fixed portion 16, and an annular member 14R2 having one end, or the positive Z-axis direction side, connected to the annular member 14R1 and the other end, or the negative Z-axis side, connected to the upper end side, or the positive Z-axis side, of the second fixed portion 17.

Each of the annular members 14R1 and 14R2 has the same shape and is an elastic body that can expand and contract, such as resin. The shape of the annular members 14R1 and 14R2 is an ellipse with a major axis in the X-axis direction intersecting with the Z-axis direction connecting the first fixing part 16 and the second fixing part 17, when the elastic deformation is not restricted by the reinforcing member. Therefore, it can be said that the annular members 14R1 and 14R2 are arranged side by side on a ZX plane including the Z-axis direction and the X-axis direction. Note that the reinforcing member of the third embodiment, which is not shown, is formed of a rigid body having the same area as the inside of the annular members 14R1 and 14R2, whose elastic deformation is not restricted, in the same manner as the reinforcing member 11 of the first embodiment. Therefore, the reinforcing member of the third embodiment is attached to the inside of each of the annular members 14R1 and 14R2, and the elastic deformation of each of the annular members 14R1 and 14R2 is restricted.

14 shows the connecting elastic body 14b in a stretched state along the Z-axis direction connecting the first fixing portion 16 and the second fixing portion 17. As shown in Fig. 14, the annular members 14R1 and 14R2, whose elastic deformation is not restricted by a reinforcing member, can expand and contract along a predetermined direction such as the Z-axis direction. When the shape of the annular members 14R1 and 14R2 changes and they stretch along the Z-axis direction,
The distance between the first fixing portion 16 and the second fixing portion 17 along the Z-axis direction becomes large. As a result, like the joining member 10 of the first embodiment, after the connecting elastic body 14b fixes the first member 20 and the second member 30, the reinforcing member restricts the elastic deformation of each of the annular members 14R1, 14R2. As a result, the first member 20 and the second member 30 are fixed by the tension of the annular members 14R1, 14R2.

As described above, in the third embodiment, the annular members 14R1 and 14R2 are arranged side by side on the ZX plane including the Z-axis direction and the X-axis direction. That is, in the third embodiment, instead of one large ring-shaped connecting elastic body 14 as in the first embodiment, a plurality of annular members 14R1,
Therefore, instead of manufacturing a connecting elastic body and a reinforcing member having a specific shape according to the application, a plurality of annular members 14R1, 14R2 having the same shape can be manufactured.
The elastic connection body 14b can be manufactured by combining the annular members 14R1 and 14R2 and the reinforcing members to be attached to the annular members 14R1 and 14R2 according to the application. This reduces the manufacturing cost of the connecting members,
The connecting member can be easily manufactured.

Fourth Embodiment
15 is a block diagram of a design system 200 that designs the shape of the reinforcing member 11 (FIG. 4). The design system 200 receives the shapes of the first fixing portion 16, the second fixing portion 17, and the connecting elastic body 14 as design domains, and uses topology optimization to:
The thickness and shape of the outer frame 12 and beams 13 of the reinforcing member 11 are automatically designed.

The design system 200 is a computer used in a data center, etc. As shown in Fig. 15, the design system 200 includes an input unit 210 that receives input of the respective shapes of the first fixing portion 16, the second fixing portion 17, and the connecting elastic body 14, and a design unit 220 that designs the shape of the reinforcing member 11 using the input values received by the input unit 210.

As shown in FIG. 15 , the design unit 220 includes a tension setting unit 221 that sets the tension to be applied in the Z-axis direction (first direction) to restrict the elastic deformation of the connection elastic body 14, and a tension setting unit 222 that sets the tension to be applied in the Z-axis direction (first direction) to restrict the elastic deformation of the connection elastic body 14.
The tension setting unit 221 functions as an optimization unit 222 that calculates a force for stretching the connection elastic body 14 in the X-axis direction (second direction) perpendicular to the Z-axis direction from the tension set by the input unit 21. The tension setting unit 221 may use the tension input by the user as in the input unit 210 as the set value, or may use a tension value set in advance as the set value.

The optimization unit 222 calculates the force to be applied in the X-axis direction using the set value set by the tension setting unit 221. The optimization unit 222 also uses the set value set by the tension setting unit 221 for topology optimization to design the shape of the reinforcing member 11 to be attached to the inside of the connection elastic body 14, which is the design region. The optimization unit 222 determines the shape of the reinforcing member 11 by changing and optimizing the thickness of the outer frame 12 and the shape and thickness of the beam 13. In this way, by using the design system 200 shown in FIG. 15, a user of the system can easily design the connecting member 10 including the reinforcing member 11 for connecting the first member 20 and the second member 30.

<Modifications of the embodiment>
The present invention is not limited to the above-described embodiment, and can be embodied in various forms without departing from the spirit of the present invention, for example, the following modifications are possible: In the above-described embodiment, a part of the configuration realized by hardware may be replaced by software, and conversely, a part of the configuration realized by software may be replaced by hardware.

<Modification 1>
In each of the above first to third embodiments, an example of the joining member 10 including the connecting elastic body 14 capable of changing the distance between the first fixing portion 16 and the second fixing portion 17 and the reinforcing member 11 that restricts the expansion and contraction caused by the elastic deformation of the connecting elastic body 14 has been described.
For example, each of the first fixing portion 16 and the second fixing portion 17 of the connecting member 10 can be deformed within a range of shapes that allow the connecting member 10 to be fixed to the first member 20 and the second member 30, respectively, and a known shape can be used.

The connecting elastic bodies 14, 14a and the annular members 14R1, 14R2 have a ring shape, but may have a shape other than a ring shape. The first fixing portion 16 and the second fixing portion 17 are disposed in opposing positions via the connecting elastic body 14, but may be disposed in different positions. For example, in the connecting elastic body 14 shown in Fig. 5, the first fixing portion and the second fixing portion may be disposed at 45° and 135° positions with respect to the center of gravity in the ZX plane, respectively.

The reinforcing structure that regulates the elastic deformation of the connecting elastic bodies 14, 14a, and 14b may be a rigid body attached to the inside of the connecting elastic body 14 as in the first embodiment, or it may be a first reinforcing part 11A or a second reinforcing part 11B fixed to other members such as the second member 30.
In the first embodiment, a recessed groove is formed around the entire periphery of the outer frame 12 of the reinforcing member 11, and the connecting elastic body 14 is fitted into the groove to attach the reinforcing member 11 to the inside of the connecting elastic body 14, but a well-known method can be used for attaching the reinforcing member 11 to the connecting elastic body 14. The reinforcing structure that restricts the elastic deformation of the connecting elastic bodies 14, 14a, 14b may restrict the expansion and contraction in the first direction by stretching the connecting elastic bodies 14, 14a, 14b in a direction (second direction) that intersects the direction (first direction) connecting the first fixing part 16 and the second fixing part 17, not necessarily in a direction perpendicular to the direction (first direction).

In the second embodiment, in order to restrict the elastic deformation of the connection elastic body 14a, as shown in Figs. 11 and 12, the first reinforcing portion 11A and the second reinforcing portion 11B arranged on a part of the connection elastic body 14a are fitted into the claw portions 31G and 31GG in a groove shape. However, the elastic deformation of the connection elastic body 14a may be restricted by other methods. For example, the first reinforcing portion 11A and the second reinforcing portion 11B may have holes through which bolts are inserted, and the second member 30a may have female threads that screw with the male threads of the bolts. In this case, the male threads of the bolts inserted through the holes formed in the first reinforcing portion 11A and the second reinforcing portion 11B screw with the female threads of the second member 30a, thereby fixing the positions of the first reinforcing portion 11A and the second reinforcing portion 11B. As a result, the connection elastic body 14 is rotated along the direction connecting the first reinforcing portion 11A and the second reinforcing portion 12B.
Since a is pulled, the expansion and contraction in the direction connecting the first fixed portion 16 and the second fixed portion 17 is restricted.

16 is a schematic front view of a coupling member 10c according to a first modified example.
In the third embodiment, the shape of the connection elastic body 14c and the shape of the reinforcing member 11c are different from those of the joining member 10 of the first embodiment. The shape of the connection elastic body 14c of the third embodiment is not a circle or an ellipse, but is
As shown in FIG. 16, the reinforcing member 11c of the third embodiment is a polygon having a recess 14D recessed inward in the middle portion along the Z axis, which is different from a rectangle having a long axis along the Z axis.
16, the reinforcing member 11c is a rigid body that restricts the recess 14D recessed inwardly of the elastic body 14c from extending outward along the X-axis direction. Unlike the first embodiment, the reinforcing member 11c engages with the outside of the elastic body 14c, not the inside, to restrict the elastic deformation of the elastic body 14c. The reinforcing member 11c does not contact the entire circumference of the elastic body 14c, but only the recess 14D.

FIG. 17 is a schematic front view of the connecting elastic body 14c in a stretched state along the Z-axis direction.
As shown in FIG. 7, the connection elastic body 14c is expandable along the Z-axis direction when the elastic deformation is not restricted by the reinforcing member 11c. The connection elastic body 14c is able to extend along the Z-axis direction by the recess 14D expanding outward along the X-axis.

<Modification 2>
FIG. 18 is a schematic perspective view of a structure 100d according to the second modification.
In comparison with the structure 100a of the second embodiment, the shapes of the first reinforcing portion 11Ad and the second reinforcing portion 11Bd and the claw portions 31Gd, 31GGd formed on the front surface 31d of the second member 30d are different.
The position of is different from.

The first reinforcing portion 11Ad and the second reinforcing portion 11Bd of the second modification are formed of a rigid body.
The first reinforcing portion 11Ad is not disposed on the ring-shaped connecting elastic body 14d, but engages with a part of the connecting elastic body 14d and is fixed to a claw portion 31Gd formed on the front surface 31d of the second member 30d, as shown in Fig. 18. Similarly, the second reinforcing portion 11Bd is not disposed on the ring-shaped connecting elastic body 14d, but engages with a part of the connecting elastic body 14d and is fixed to the claw portion 31Gd formed on the front surface 31d of the second member 30d.
The first reinforcing portion 11Ad and the second reinforcing portion 11Bd are fixed to the claw portions 31GGd formed on the front surface 31d of the connecting elastic body 14. The claw portions 31Gd, 31GGd are formed on the same axis parallel to the X-axis on the front surface 31d. Therefore, the direction connecting the first reinforcing portion 11Ad and the second reinforcing portion 11Bd fixed to the claw portions 31Gd, 31GGd is parallel to the X-axis and perpendicular to the Z-axis direction connecting the first fixing portion 16 and the second fixing portion 17. As described above, the first reinforcing portion 11Ad and the second reinforcing portion 12Bd are fixed to the connecting elastic body 14.
It is not necessary that the elastic connection body 14 is disposed on the elastic connection body 14d, and it may be formed separately from the elastic connection body 14d.

<Modification 3>
19 and 20 are schematic front views of the elastic connection body 14e of the third modified example.
0 shows the elastic connection body 14e, the first fixing portion 16e, and the second fixing portion 17e of the coupling members of the modified example 3, excluding the reinforcing member, as in the third embodiment (FIGS. 13 and 14). The elastic connection body 14e of the modified example 2 is different from the elastic connection body 14b of the third embodiment in that it has nine annular members 14R1e to 14R9e.

19 shows a state in which the elastic deformation of the connection elastic body 14e is not restricted. Each of the annular members 14R1e to 14R9e has the same elliptical shape and is a stretchable elastic body such as resin. As shown in FIG. 20, the nine annular members 14R1e to 14R9e are Z
On the X plane, a total of nine are arranged, three along each of the X axis and the Z axis.

The three annular members 14R1e, 14R4e, and 14R7e located on the positive side of the Z axis are the first
The three annular members 1 located on the negative Z-axis direction side are connected to the fixed portion 16.
The ring members 4R3e, 14R6e, and 14R9e are connected to the Z-axis positive side of the second fixed portion 17. Each of the six ring members 14R1e to 14R3e and 14R7e to 14R9e is connected to two adjacent ring members. Each of the two ring members 14R4e and 14R6e is connected to three adjacent ring members. The ring member 14 located at the center
R5e is connected to four adjacent annular members 14R2e, 14R4e, 14R6e, and 14R8e.

The reinforcing member of the second modification, which is not shown in Figures 19 and 20, is formed of a rigid body having the same area as the inside of the annular members 14R1e to 14R9e whose elastic deformation is not restricted, like the reinforcing member 11 of the first embodiment.
The reinforcing member of the third embodiment is attached to the inside of each of the annular members 14R.
The elastic deformation of each of 1e to 14R9e is restricted.

Fig. 20 shows the connecting elastic body 14e in a state stretched along the Z-axis direction connecting the first fixing portion 16e and the second fixing portion 17e. As shown in Fig. 20, the annular members 14R1e to 14R9e, whose elastic deformation is not restricted by a reinforcing member, can expand and contract along a predetermined direction such as the Z-axis direction. When the shape of the annular members 14R1e to 14R9e is deformed and stretched along the Z-axis direction, the distance between the first fixing portion 16e and the second fixing portion 17e along the Z-axis direction increases.

<Modification 4>
21 is a schematic perspective view of a structure 100f of the modified example 4. The structure 100f includes a first member 20f, a second member 30f, and a connecting member 1 that connects the first member 20f and the second member 30f.
0, a third member 40, and a connecting member 10 connecting the second member 30f and the third member 40.
As shown in Fig. 21, in one of the two connecting members 10, the first fixing portion 16 is fixed to the first member 20f, and the second fixing portion 17 is fixed to the second member 30f. In the other of the two connecting members 10, the first fixing portion 16 is fixed to the second member 30f, and the second fixing portion 17 is fixed to the second member 30f. By the two connecting members 10,
The first member 20f and the second member 30f are joined together, and the second member 30f is fixed to the third member 40. In this manner, a plurality of members may be joined together by a plurality of joining structures.

<Modification 5>
22 is a schematic perspective view of a structure 100g of the modified example 5. In the structure 100g, compared to the structure 100f of the modified example 4, the third member 4 having a rectangular parallelepiped shape is joined to the second member 30g.
The difference is that the long axes of the third member 40g and the fourth member 50 intersect at an angle that is not perpendicular to the Z-axis direction connecting the first fixing portion 16 and the second fixing portion 17 of the connecting member 10. That is, the third member 40g and the fourth member 50 are connected to the second member 30g at an angle having a predetermined inclination (e.g., 60°) and not perpendicular to the Z-axis direction connecting the first fixing portion 16 and the second fixing portion 17 of the connecting member 10. In this way, the direction in which the connecting elastic body 14 of the connecting member 10 expands and contracts during connection does not have to be parallel to the direction of the long axes of the two connected members.

In the above embodiment and modified example, the shape of the joining member 10 and the like has been described using the X, Y, and Z axes in the rectangular coordinate system CS defined as an example, but the shape of the joining member 10 and the like may be expressed in different ways depending on the defined coordinate system. In this specification, each shape has been described with the Z axis being an axis parallel to the vertical direction, but for example, the first member 20 and the second member 30
Even if the orthogonal coordinate system CS is tilted 90 degrees to the horizontal direction, if the orthogonal coordinate system CS is similarly tilted 90 degrees to the horizontal direction, an explanation using the tilted orthogonal coordinate system CS is equivalent to explaining the same shape and positional relationship.

Although the present aspect has been described above based on the embodiment and modified examples, the above-mentioned embodiment of the aspect is intended to facilitate understanding of the present aspect and does not limit the present aspect. The present aspect may be modified or improved without departing from the spirit and scope of the claims, and equivalents are included in the present aspect. Furthermore, if a technical feature is not described as essential in this specification, it may be deleted as appropriate.

The present invention can also be realized in the following forms.
[Application Example 1]
A joining structure for joining a first member and a second member,
A first fixing portion fixed to the first member;
A second fixing portion fixed to the second member;
a connecting elastic body that is connected to the first fixed portion and the second fixed portion, respectively, and is formed of an elastic member, and that is capable of changing a distance between the first fixed portion and the second fixed portion by expanding and contracting due to elastic deformation along a first direction connecting the first fixed portion and the second fixed portion;
A bonding structure comprising: a reinforcing structure that restricts expansion and contraction due to elastic deformation of the connecting elastic body along the first direction by stretching the connecting elastic body in a second direction intersecting the first direction.
[Application Example 2]
The bonded structure according to Application Example 1,
The connecting elastic body has a ring shape,
the first fixing portion and the second fixing portion are disposed at positions facing each other with the connecting elastic body interposed therebetween,
The first direction and the second direction are orthogonal.
[Application Example 3]
The bonded structure according to Application Example 1 or Application Example 2,
The reinforcing structure is a rigid body that is detachable from the connecting elastic body, and by being attached to the inside of the ring shape of the connecting elastic body, it regulates the expansion and contraction of the connecting elastic body due to elastic deformation along the first direction, a bonding structure.
[Application Example 4]
The bonded structure according to any one of Application Examples 1 to 3,
The reinforcing structure includes:
a first reinforcing part detachably fixed to one of the first member and the second member;
a second reinforcing part detachably fixed to one of the first member and the second member,
the first reinforcement portion and the second reinforcement portion are each connected to the connecting elastic body, face each other via the connecting elastic body, and are disposed at a position where a line connecting the first reinforcement portion and the second reinforcement portion is along the second direction,
A bonded structure in which the first reinforcement portion and the second reinforcement portion are fixed to one of the first member and the second member, thereby restricting expansion and contraction due to elastic deformation of the connecting elastic body along the first direction.
[Application Example 5]
The bonded structure according to any one of Application Example 1 to Application Example 4,
A coupling structure, wherein the connecting elastic body has a configuration in which a plurality of annular elastic bodies are arranged side by side on a plane including the first direction and the second direction.
[Application Example 6]
A system for designing a joint structure for joining a first member and a second member, comprising:
an input section for inputting the shapes of a first fixed portion fixed to the first member, a second fixed portion fixed to the second member, and a connecting elastic body formed of an elastic member and connected to the first fixed portion and the second fixed portion, respectively, the connecting elastic body being capable of changing the distance between the first fixed portion and the second fixed portion by expanding and contracting due to elastic deformation along a first direction connecting the first fixed portion and the second fixed portion;
a design unit that uses an input value input to the input unit to calculate a tension to be applied along the first direction when the first member and the second member are joined, using a force that stretches the connection elastic body in a second direction that intersects the first direction, and designs a shape of a reinforcement structure that is optimized to obtain the calculated force that stretches in the second direction; and
A design system comprising:

10, 10a, 10c...connecting member (connecting structure)
11, 11c... Reinforcing member (reinforcing structure)
11A, 11Ad... First reinforcing portion 11B, 11Bd... Second reinforcing portion 12... Outer frame 13... Beam 14, 14a, 14b, 14c, 14d, 14e... Connection elastic body 14D... Recess 14R, 14R1, 14R2, 14R1e to 14R9e... Annular member (annular elastic body)
16, 16e... First fixing portion 16A... Elastic body connection portion 16B... Groove portion 16C... Return portion 17, 17e... Second fixing portion 17A... Elastic body connection portion 17B... Groove portion 17C... Return portion 20, 20f, 20g... First member (first member)
21...Engagement surface of first member 21H...First engagement portion of first member 22, 23...Side surface of first member 24...Bottom surface of first member 25...Rear surface of first member 30, 30a, 30d, 30f, 30g...Second member 31, 31a, 31d...Front surface of second member 31F...Flat surface 31G, 31Gd...Claw portion 31G1...Groove portion 31G2...Return portion 31GG, 31GGd...Claw portion 32...Bottom surface of second member 34...Insertion surface of second member 34H2, 34H3...Slit of insertion surface 35...Rear surface of second member 36...Engagement surface of second member 36H1...Second engagement portion of second member 36H2, 36H3...Slit of second member 40, 40g...Third member 50...Fourth member 100, 100a, 100d, 100f, 100g... Structure 200... Design system 210... Input section 220... Design section 221... Tension setting section 222... Optimization section CS... Cartesian coordinate system

Claims (6)

A joining structure for joining a first member and a second member,
A first fixing portion fixed to the first member;
A second fixing portion fixed to the second member;
a connecting elastic body that is connected to the first fixed portion and the second fixed portion, respectively, and is formed of an elastic member, and that is capable of changing a distance between the first fixed portion and the second fixed portion by expanding and contracting due to elastic deformation along a first direction connecting the first fixed portion and the second fixed portion;
A bonding structure comprising: a reinforcing structure that restricts expansion and contraction due to elastic deformation of the connecting elastic body along the first direction by stretching the connecting elastic body in a second direction intersecting the first direction. 2. The bonded structure of claim 1,
The connecting elastic body has a ring shape,
the first fixing portion and the second fixing portion are disposed at positions facing each other with the connecting elastic body interposed therebetween,
The first direction and the second direction are orthogonal. 3. The bonded structure of claim 2,
The reinforcing structure is a rigid body that is detachable from the connecting elastic body, and by being attached to the inside of the ring shape of the connecting elastic body, it regulates the expansion and contraction of the connecting elastic body due to elastic deformation along the first direction, a bonding structure. 3. The bonded structure of claim 2,
The reinforcing structure includes:
a first reinforcing part detachably fixed to one of the first member and the second member;
a second reinforcing part detachably fixed to one of the first member and the second member,
the first reinforcement portion and the second reinforcement portion are each connected to the connecting elastic body, face each other via the connecting elastic body, and are disposed at a position where a line connecting the first reinforcement portion and the second reinforcement portion is along the second direction,
A bonded structure in which the first reinforcement portion and the second reinforcement portion are fixed to one of the first member and the second member, thereby restricting expansion and contraction due to elastic deformation of the connecting elastic body along the first direction. 3. The bonded structure of claim 2,
A coupling structure, wherein the connecting elastic body has a configuration in which a plurality of annular elastic bodies are arranged side by side on a plane including the first direction and the second direction. A system for designing a joint structure for joining a first member and a second member, comprising:
an input section for inputting the shapes of a first fixed portion fixed to the first member, a second fixed portion fixed to the second member, and a connecting elastic body formed of an elastic member and connected to the first fixed portion and the second fixed portion, respectively, the connecting elastic body being capable of changing the distance between the first fixed portion and the second fixed portion by expanding and contracting due to elastic deformation along a first direction connecting the first fixed portion and the second fixed portion;
a design unit that uses an input value input to the input unit to calculate a tension to be applied along the first direction when the first member and the second member are joined, using a force that stretches the connection elastic body in a second direction that intersects the first direction, and designs a shape of a reinforcement structure that is optimized to obtain the calculated force that stretches in the second direction; and
A design system comprising:

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