Coating structure, and method for manufacturing a coating structure

Abstract

To provide techniques relating to a covering structure that is strong, airtight, and easy to deploy, and that can be deployed from a folded metal plate.SOLUTION: A covering structure formed by bending a flat metal plate and forming a space inside comprises: a first bend portion provided in the metal plate and bent with a predetermined radius of curvature, and a second bend portion formed by further bending the first bend portion and bent in a different direction than the first bend portion with a radius of curvature greater than that of the first bend portion.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a covering structure and a method for manufacturing the covering structure.

Background Art

[0002] There is a structure that can cover the surroundings of an object and form a space inside. For example, Patent Document 1 discloses a foldable mobile shelter unit.

[0003] Also, Patent Document 2 discloses a folding framework structure and a canopy cloth that covers the folding framework structure.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] For example, there is a covering structure that can be deployed from a folded state and forms a space inside, such as the shelter unit described in Patent Document 1. Conventional covering structures often have problems such as the folding parts being composed of separate materials such as hinge fittings or other members, being weak in strength and airtightness, and being difficult to deploy.

[0006] In view of the above problems, an object of the present invention is to provide a technique related to a covering structure that can be deployed from a folded state of a metal plate, is excellent in strength and airtightness, and is easy to deploy.

Means for Solving the Problems

[0007] To solve the above problems, the present invention forms the structure from a single metal plate and, by devising a way to bend the folded portion, enables it to be unfolded without the folded portion breaking.

[0008] More specifically, the present invention relates to a covering structure formed by bending a flat metal plate, which has a space inside, and comprises a first bent portion provided on the metal plate and bent with a predetermined radius of curvature, and a second bent portion formed by further bending the first bent portion and bent in a different direction from the first bent portion with a larger radius of curvature than the first bent portion.

[0009] The covering structure according to the present invention is formed from a single metal plate, and therefore offers superior strength and airtightness compared to conventional structures in which the bent portion is made of a different material or other component, such as a hinge fitting. Furthermore, by having a first bent portion and a second bent portion, the structure can be unfolded without the bent portion breaking. Therefore, it can be easily unfolded. Examples of metal plates include aluminum alloy and steel.

[0010] In the covering structure according to the present invention, it is preferable that the radius of curvature of the first bent portion is 5 times or more the thickness of the flat plate member, and the radius of curvature of the second bent portion is 10 times or more the radius of curvature of the first bent portion.

[0011] By designing the radii of curvature of the first and second bends as described above, the bends can be unfolded without breaking. The thickness of the flat plate member can be 0.2 to 5 mm. It is more preferable that the radius of curvature of the first bend be 5 to 50 times the thickness of the flat plate member, and the radius of curvature of the second bend be 10 to 100 times the radius of curvature of the first bend.

[0012] Furthermore, in the coating structure according to the present invention, the metal plate is made of an aluminum alloy or steel, and the elongation performance of the metal plate can be 10% or more.

[0013] By using an aluminum alloy or steel for the metal plate, and by ensuring the elongation performance of the metal plate is 10% or more, the folded portion can be unfolded without breaking.

[0014] Here, the covering structure according to the present invention may further include a plurality of protrusions and indentations arranged at predetermined intervals.

[0015] By incorporating multiple protrusions and indentations, the strength can be further improved. Furthermore, by incorporating multiple protrusions and indentations, the axial stiffness of the metal plate's cross-section can be reduced compared to a case without these protrusions. Reduced axial stiffness makes the metal plate more susceptible to contraction, resulting in a structure prone to jump buckling. On the other hand, the bending stiffness of the metal plate can be increased compared to a case without these protrusions, making it less susceptible to so-called Euler buckling. As a result, the metal plate becomes more prone to jump buckling. Therefore, the covering structure can be easily deployed.

[0016] Furthermore, in the covering structure according to the present invention, the uneven portion can have an outer diameter 150 to 200 times the thickness of the metal plate and a depth 10 to 20 times the thickness of the metal plate.

[0017] By setting the outer diameter of the uneven section and the thickness of the metal plate as described above, the metal plate becomes less prone to breakage, and its strength can be further improved. In addition, the structure becomes more susceptible to jump buckling (phenomenon), allowing for easy deployment.

[0018] Herein, the present invention can be specified as a method for manufacturing a covered structure. For example, the present invention is a method for manufacturing a covered structure which is formed by bending a flat metal plate and which forms a space inside, and includes a first bending portion forming step of forming a first bent portion on the metal plate with a predetermined radius of curvature, and a second bending portion forming step of forming a second bent portion by further bending the first bent portion in a different direction from the first bent portion with a larger radius of curvature than the first bent portion.

[0019] According to the method for manufacturing a covering structure of the present invention, by having a first bending portion forming step and a second bending portion forming step, it is possible to manufacture a covering structure with superior strength and airtightness compared to conventional structures in which the bent portion is made of a different material or other component such as a hinge fitting. Furthermore, by having a first bending portion and a second bending portion, it is possible to manufacture a covering structure in which the bent portion can be unfolded without breaking.

[0020] Furthermore, the coating structure according to the present invention further includes a step of forming a plurality of uneven portions arranged at predetermined intervals, wherein in the uneven portion forming step, the corresponding molds for the convex portions and the molds for the concave portions are aligned such that a predetermined offset interval is formed in the planar direction of the metal plate, and the metal plate is sandwiched between them to form the uneven portions.

[0021] The process of forming uneven surfaces can further improve the strength of the covering structure. Furthermore, it creates a structure that is prone to jump-transfer buckling (phenomenon), allowing for the manufacture of an easily deployable covering structure. The predetermined spacing between the uneven surfaces should be such that they do not overlap. The predetermined offset spacing is the gap between the mold for the convex parts and the mold for the concave parts. The predetermined offset spacing is preferably set to a distance from a virtual reference line passing through the center of the gap between the molds, and the distance from this virtual reference line is preferably 2 to 5 times the plate thickness. The plate thickness can be 0.2 mm to 5 mm.

[0022] For example, consider the foldable frame structure described in Patent Document 2. To improve the rigidity of such a foldable frame structure, one might consider connecting braces to the support members (frames) that make up the structure in a crisscross manner. However, connecting braces makes it difficult to fold. In other words, while connecting braces to the frame improves rigidity, it tends to create constraints when folding.

[0023] Therefore, in view of the above problems, the present invention may also aim to provide a technology relating to a frame structure that is excellent in rigidity and has a high degree of freedom in its external shape and folded state.

[0024] In order to solve the above problems, in the present invention, for a deployable frame structure having a deployed state and a folded state, in the folded state, a rotating frame connected to the shaft frame may be positioned along the axial direction of the shaft frame, and in the deployed state, it may be positioned in a direction different from the axial direction of the shaft frame.

[0025] Specifically, the present invention is a deployable frame structure having a deployed state and a folded state, comprising a shaft frame, and a rotating frame that is rotatably connected to a connection portion provided on the shaft frame, and is positioned along the axial direction of the shaft frame in the folded state and in a direction different from the axial direction of the shaft frame in the deployed state, the rotating frame having a first rotating frame and a second rotating frame connected to the connection portion of the shaft frame; a plurality of braces that support the first rotating frame and the second rotating frame; and a branch plate to which one ends of the plurality of braces are connected, the branch plate rotatably connecting the plurality of braces such that in the folded state, the plurality of braces are positioned along the axial direction of the shaft frame, and in the deployed state, the plurality of braces are positioned in a direction different from the axial direction of the shaft frame.

[0026] In the frame structure according to the present invention, in the folded state, the rotating frame connected to the shaft frame is positioned along the axial direction of the shaft frame, so that it becomes very compact in the folded state. Also, in the deployed state, the rotating frame is positioned in a direction different from the axial direction of the shaft frame, so that a larger frame structure can be provided as compared with the folded state. Further, the rigidity is improved by providing a plurality of braces. Furthermore, by providing a branch plate to which one ends of the plurality of braces are connected, the plurality of braces can be positioned along the axial direction of the shaft frame in the folded state, facilitating folding. In other words, it is possible to provide a technology related to a frame structure that is excellent in rigidity and has a high degree of freedom in external shape and folded state.

[0027] Furthermore, in the frame structure according to the present invention, the axial frame may be configured to be expandable and contractible in the axial direction and to include a first axial frame, a second axial frame that is slidable relative to the first axial frame, and a fixing part that fits and fixes the first axial frame and the second axial frame in the deployed state.

[0028] By making the axis frame extendable and retractable, it is possible to provide a frame structure that is very compact in the folded state, while being larger in the unfolded state compared to the folded state. Furthermore, by providing a fixing part, the rigidity in the unfolded state can be improved. In other words, it is possible to provide a frame structure technology that is highly rigid and has a high degree of freedom in terms of external shape and folded state. In the folded state, the second axis frame may be positioned so that it rides over and follows the first axis frame. This makes it possible to utilize the space in the direction perpendicular to the axis frame (height direction). As a result, in the folded state, the braces, branch plates, and rotating frames connected to the first and second axis frames are located at different heights. Consequently, interference between the braces, rotating frames, branch plates, and rotating frames is suppressed in the folded state, making it possible to fold it compactly.

[0029] Furthermore, the present invention may be specified as a shelter. For example, the present invention is a shelter that forms a space inside, comprising: a deployable frame structure having an unfolded state and a folded state; and a covering structure that is deployable in conjunction with the frame structure, formed by bending a flat plate member, and forms a space inside, wherein the frame structure comprises an axis frame and a rotating frame that is rotatably connected to a connection part provided on the axis frame, positioned along the axial direction of the axis frame in the folded state and positioned in a direction different from the axial direction of the axis frame in the unfolded state, and having a first rotating frame and a second rotating frame connected to the connection part of the axis frame The covering structure comprises a frame, a plurality of braces supporting a first rotating frame and a second rotating frame, and a branching plate to which one end of the plurality of braces is connected, the branching plate rotatably connecting the plurality of braces such that in the folded state the plurality of braces are positioned along the axial direction of the axis frame, and in the unfolded state the plurality of braces are positioned in a direction different from the axial direction of the axis frame, and the covering structure is a shelter provided on a flat plate member and having a first bent portion bent with a predetermined radius of curvature, and a second bent portion provided within the first bent portion and bent in a direction different from the first bent portion with a larger radius of curvature. [Effects of the Invention]

[0030] According to the present invention, it is possible to provide a technology relating to a covering structure that is excellent in strength and airtightness, and is easy to unfold, and which can be unfolded from a folded state of a metal plate. [Brief explanation of the drawing]

[0031] [Figure 1] Figure 1 shows perspective views of the covering structure according to the first embodiment in its folded and unfolded states. [Figure 2] Figure 2 shows a perspective view illustrating the schematic configuration of the covering structure according to the first embodiment, with the first and second bent sections enlarged. [Figure 3] Figure 3 shows the manufacturing flow of the coating structure according to the first embodiment. [Figure 4]Figure 4 shows perspective views of the covered structure in its folded and unfolded states according to the second embodiment. [Figure 5] Figure 5 shows a perspective view illustrating the schematic configuration of the covering structure according to the second embodiment, with the first and second bent sections enlarged. [Figure 6] Figure 6 shows an enlarged plan view of the uneven surface according to the second embodiment. [Figure 7] Figure 7 shows the manufacturing flow of the coating structure according to the second embodiment. [Figure 8] Figure 8 shows a plan view of the recess type according to the second embodiment. [Figure 9] Figure 9 shows a plan view of the type for the convex portion according to the second embodiment. [Figure 10] Figure 10 shows an explanatory diagram illustrating the state before and after the formation of the uneven surface. [Figure 11] Figure 11 shows a plan view (unfolded state) of the frame structure according to the third embodiment. [Figure 12] Figure 12 shows perspective views of the frame structure according to the third embodiment in its folded and unfolded states. [Figure 13] Figure 13 shows elevation views of the axial frame of the frame structure according to the third embodiment in both the folded and unfolded states. [Figure 14] Figure 14 shows a diagram illustrating the first axis frame of the frame structure according to the third embodiment. [Figure 15] Figure 15 shows a diagram illustrating the second axis frame of the frame structure according to the third embodiment. [Figure 16] Figure 16 shows a diagram illustrating the third axis frame of the frame structure according to the third embodiment. [Figure 17] Figure 17 shows a diagram illustrating the first rotating frame of the frame structure according to the third embodiment. [Figure 18] Figure 18 shows a diagram illustrating the second rotating frame of the frame structure according to the third embodiment. [Figure 19] Figure 19 shows a side view of an example of a flange fixing member according to the third embodiment. [Figure 20]Figure 20 shows a side view of an example of a pin according to the third embodiment. [Figure 21] Figure 21 shows a plan view of the connecting plate of the axial frame of the frame structure according to the third embodiment. [Figure 22] Figure 22 shows a plan view of an example of a brace in a frame structure according to the third embodiment. [Figure 23] Figure 23 shows a plan view of an example of a branch plate of a frame structure according to the third embodiment. [Figure 24] Figure 24 shows a perspective view of an example of a shelter according to the fourth embodiment. [Figure 25] Figure 25 shows an unfolded view of the upper part of the covering structure according to the fourth embodiment. [Figure 26] Figure 26 shows a perspective view of an example of a shelter according to the fifth embodiment. [Figure 27] Figure 27 shows a plan view of the frame structure according to the fifth embodiment. [Figure 28] Figure 28 shows an unfolded view of the covering structure (upper side) according to the fifth embodiment. [Figure 29] Figure 29 shows an unfolded view of the covering structure (lower side) according to the fifth embodiment. [Figure 30] Figure 30 shows perspective views of the container device in its folded and unfolded states according to the sixth embodiment. [Figure 31] Figure 31 shows a top view of the container device according to the sixth embodiment. [Figure 32] Figure 32 shows a front view of the container device according to the sixth embodiment. [Figure 33] Figure 33 shows a side view of the container device according to the sixth embodiment. [Figure 34] Figure 34 shows an example of a covering structure related to Test Example 1. [Figure 35] Figure 35 shows an example of a covering structure related to Test Example 2. [Figure 36] Figure 36 shows an example of the uneven surface of the covering structure according to the seventh embodiment. [Figure 37]Figure 37 shows a diagram illustrating the parameters and mathematical formulas for the uneven surface according to the seventh embodiment. [Figure 38] Figure 38 shows a plan view of the recess type according to the seventh embodiment. [Figure 39] Figure 39 shows a plan view of the type for the convex portion according to the seventh embodiment. [Modes for carrying out the invention]

[0032] Next, embodiments of the present invention will be described with reference to the drawings. The following description is illustrative, and the present invention is not limited to the following.

[0033] <First Embodiment> <Overview of the covering structure> Figure 1 shows perspective views of the covered structure according to the first embodiment in a folded state and an unfolded state. Figure 2 shows a perspective view illustrating the schematic configuration of the covered structure according to the first embodiment. The covered structure 1 according to the first embodiment is formed by bending a flat metal plate 11, creating a space inside. The covered structure 1 includes a first bent portion 12 provided on the metal plate 11 and bent with a predetermined radius of curvature, and a second bent portion 13 formed by further bending the first bent portion 12, which is bent in a different direction from the first bent portion 12 with a larger radius of curvature than the first bent portion 12.

[0034] The covering structure 1 according to the first embodiment is formed by folding multiple sections with mountain folds and valley folds in an appropriate combination, so that it can transition from a folded state to an unfolded state without breaking. A mountain fold is a bent section where the creases (first bent section, second bent section) are on the outside. A valley fold is a bent section where the creases (first bent section, second bent section) are hidden on the inside. The first bent section 12 is a bent section that has been folded once with a predetermined radius of curvature. The second bent section 13 is a bent section where the first bent section 12 is further bent in a different direction from the first bent section 12 with a larger radius of curvature than the first bent section 12.

[0035] The metal plate 11 of the covering structure according to the first embodiment is made of an aluminum alloy with a thickness of 2 mm and an elongation performance of 10%. The metal plate 11 may be made of steel instead of aluminum alloy. The thickness of the metal plate 11 is preferably 0.2 to 5 mm. The elongation performance of the metal plate is preferably 10% or more.

[0036] Preferably, the radius of curvature of the first bend 12 is 10 times or more the thickness of the metal plate 11, and the radius of curvature of the second bend 13 is 10 times or more the radius of curvature of the first bend 12. More preferably, the radius of curvature of the first bend 12 is 10 to 100 times the thickness of the metal plate 11, and the radius of curvature of the second bend 13 is 10 to 100 times the radius of curvature of the first bend.

[0037] <Method for manufacturing a coated structure> Figure 3 shows the manufacturing flow of a coating structure according to the first embodiment. The manufacturing method for the coating structure 1, which is formed by bending a flat metal plate 11 and forms a space inside, includes a first bending portion forming step (S01) in which a first bending portion 12 is formed in the metal plate 11 with a predetermined radius of curvature, and a second bending portion forming step (S02) in which, after the formation of the first bending portion 12, the first bending portion 12 is further bent in a different direction from the first bending portion with a larger radius of curvature than the first bending portion to form a second bending portion.

[0038] The metal plate 11 is made of an aluminum alloy with a thickness of 2 mm and an elongation performance of 10%. The metal plate 11 may be made of steel instead of aluminum alloy. The thickness of the metal plate 11 may be 0.2 to 5 mm. The elongation performance of the metal plate is preferably 10% or more.

[0039] In the first bending portion formation process (S01), a rod-shaped member having a diameter corresponding to the radius of curvature of the first bending portion 12 is applied to the area where the first bending portion 12 will be formed. The member is bent in a way that prevents wrinkles from forming on the inside and cracks from forming on the outside, thereby forming the first bending portion 12. The radius of curvature of the first bending portion 12 is appropriately designed to be 5 to 50 times the thickness of the metal plate 11. Once the first bending portion formation process is completed, the process proceeds to the second bending portion formation process.

[0040] In the second bending section formation step (S02), a rod-shaped member having a diameter corresponding to the radius of curvature of the second bending section 13 is applied to the part to be formed of the second bending section 13, and the member is bent so as not to wrinkle on the inside and not to crack on the outside, thereby forming the second bending section 13. The radius of curvature of the second bending section 13 is appropriately designed to be 10 to 100 times the radius of curvature of the first bending section. Once the second bending section formation step is completed, the manufacturing of the covering structure 1 is completed. When manufacturing the covering structure 1 as shown in Figure 1, the first bending section formation step and the second bending section formation step are repeated to manufacture the covering structure 1. Although an example of forming a bending section using a rod-shaped member has been described, it is sufficient to form a bending section with a predetermined radius of curvature, and the bending section may be formed by other methods.

[0041] <Effects of the covering structure> The covering structure 1 according to the first embodiment is formed from a single metal plate 11, and therefore has superior strength and airtightness compared to conventional structures in which the bent portion is made of a different material or other component such as a hinge fitting. Furthermore, by using an aluminum alloy for the metal plate, setting the thickness of the metal plate 11 to 0.2 mm to 5 mm, and setting the elongation performance of the metal plate 11 to 10% or more, and designing the radius of curvature of the first bent portion 12 to be 5 to 50 times the thickness of the flat plate member, and the radius of curvature of the second bent portion 13 to be 10 to 100 times the radius of curvature of the first bent portion 12, the bent portion can be unfolded without breaking.

[0042] <Second Embodiment> <Overview of the covering structure> Figure 4 shows perspective views of the covered structure according to the second embodiment in its folded and unfolded states. Figure 5 shows a perspective view illustrating the schematic configuration of the covered structure according to the second embodiment, with the first and second bent sections enlarged. Figure 6 shows an enlarged plan view of the uneven portion according to the second embodiment. The covered structure 1 according to the second embodiment has a configuration that, in addition to the configuration of the covered structure 1 according to the first embodiment, further comprises a plurality of uneven portions 15 arranged at predetermined intervals. Note that in Figures 4 and 5, the uneven portions 15 are depicted larger than they actually are. For the covered structure 1 according to the second embodiment, components similar to those of the covered structure 1 according to the first embodiment are denoted by the same reference numerals and their descriptions are omitted.

[0043] The uneven portion 15 formed on the covering structure 1 according to the second embodiment has a configuration that includes a central part 151 and five elongated parts 152 extending radially from the central part 151 (hereinafter, the shape consisting of the central part 151 and the five elongated parts 152 is also referred to as a petal shape). The central part 151 and one end 152a of the elongated part 152 are connected. The other end 152b is formed in a circular shape. The elongated part 152 is formed with the widest width near the center in the axial direction (direction of radial extension), and its width gradually narrows towards one end 152a and the other end 152b.

[0044] The uneven portion 15 can have an outer diameter 150 to 200 times the thickness of the metal plate 11 and a depth 10 to 20 times the thickness of the metal plate 11. The outer diameter is the diameter of the circle passing through the other end 152b of the elongated portion 152 of the uneven portion 15. The depth is the distance from the surface of the metal plate 11 to the bottom surface of the recess or protrusion.

[0045] <Method for manufacturing a coated structure> Figure 7 shows the manufacturing flow of the coating structure according to the second embodiment. The manufacturing method of the coating structure according to the second embodiment differs from the manufacturing method of the coating structure according to the first embodiment in that it further includes a process for forming the uneven portion 15. Specifically, the manufacturing method of the coating structure according to the second embodiment is:

[0046] In the process of forming the uneven portion (S10), the uneven portion 15 is formed by sandwiching the metal plate 11 between the recess mold 17 and the convex mold 18 and pressing it. Here, Figure 8 shows a plan view of the recess mold according to the second embodiment. Figure 9 shows a plan view of the convex mold according to the second embodiment. Figure 10 shows an explanatory diagram of the state before and after the formation of the uneven portion. The recess mold 17 shown in Figure 8 is made of wood and has a petal-shaped recess in the center. The outer shape of the recess mold 17 is molded into a petal shape to suppress interference with other adjacent recess molds 17 during manufacturing. Similarly, the convex mold 18 shown in Figure 9 is made of wood and has a petal-shaped convex in the center. The outer shape of the convex mold 18 is molded into a petal shape to suppress interference with other adjacent convex molds 18 during manufacturing. In the second embodiment, the outer diameter of the petal shape that forms the recess is formed to be larger than the outer diameter of the petal shape that forms the convex. The outer diameter of the petal shape forming the recess and the outer diameter of the petal shape forming the convex portion can be designed to be 150 to 200 times the thickness of the metal plate 11, and the depth can be designed to be 10 to 20 times the thickness of the metal plate 11. The difference between the outer diameter of the petal shape forming the recess and the outer diameter of the petal shape forming the convex portion, in other words, the distance between the wall surface of the recess mold and the wall surface of the convex portion mold corresponds to the offset interval of the present invention. The offset interval is the distance between the two dotted lines extending vertically in Figure 10. Preferably, the offset interval is set to a distance from a virtual reference line (shown as a dashed line in Figure 10) passing through the center of the gap between the convex portion mold and the recess mold, and the distance from this virtual reference line is 2 to 5 times the plate thickness. The plate thickness can be 0.2 mm to 5 mm. The recess mold 17 and the convex portion mold 18 may be made of resin (e.g., plastic), metal, etc. instead of wood.

[0047] After the uneven surface formation process (S10) is completed, the first bent surface formation process (S01) is performed, and after the first bent surface formation process is completed, the second bent surface formation process (S02) is performed, thereby manufacturing the coating structure 1 according to the second embodiment.

[0048] <Effects of the covering structure> The covering structure 1 according to the second embodiment can be made stronger by providing multiple protrusions 15 in addition to the effects of the covering structure 1 according to the first embodiment. Furthermore, by setting the outer diameter of the protrusions 15 and the thickness of the metal plate 11 as described above, the metal plate 11 becomes less likely to break, further improving its strength. In addition, by providing multiple protrusions 15, the axial stiffness in the cross-section of the metal plate 11 can be made smaller compared to the case without the protrusions 15. As the axial stiffness decreases, the surface of the metal plate 11 becomes more prone to contraction, and the metal plate 11 becomes a structure that is more susceptible to jump buckling (phenomenon). On the other hand, since the bending stiffness of the metal plate 11 can be made larger compared to the case without the protrusions 15, it becomes less susceptible to so-called Euler buckling. As a result, the metal plate 11 becomes a structure that is more susceptible to jump buckling (phenomenon). From the above, the covering structure 1 can be easily unfolded.

[0049] <Third Embodiment> <frame structure> Figure 11 shows a plan view (unfolded state) of the frame structure according to the third embodiment. Figure 12 shows perspective views of the frame structure according to the third embodiment in the folded state and the unfolded state. The frame structure 3 according to the third embodiment is an unfoldable frame structure having an unfolded state and a folded state, and comprises an axle frame 4, a rotating frame that is rotatably connected to a connecting plate 5 (connecting part of the present invention) provided on the axle frame 4, is positioned along the axial direction of the axle frame 4 in the folded state and is positioned in a direction different from the axial direction of the axle frame 4 in the unfolded state, and has a first rotating frame 6 and a second rotating frame 7 connected to the connecting plate 5 of the axle frame 4, a plurality of braces 8 that support the first rotating frame 6 and the second rotating frame 7, and a branching plate 9 to which one end of the plurality of braces 8 is connected, the branching plate 9 rotatably connects the plurality of braces 8 such that the plurality of braces 8 are positioned along the axial direction of the axle frame 4 in the folded state and in a direction different from the axial direction of the axle frame 4 in the unfolded state.

[0050] Figure 13 shows elevation views of the axial frame of the frame structure according to the third embodiment in its folded and unfolded states. Figure 14 shows a diagram illustrating the first axial frame of the frame structure according to the third embodiment. Figure 15 shows a diagram illustrating the second axial frame of the frame structure according to the third embodiment. Figure 16 shows a diagram illustrating the third axial frame of the frame structure according to the third embodiment. In Figures 14, 15, and 16, (a) is an elevation view in the longitudinal direction, (b) is a plan view of the upper flange, (c) is a plan view of the middle flange, (d) is a plan view of the lower flange, and (e) is an elevation view in the transverse direction. The axial frame 4 is extendable and retractable in the axial direction and comprises a first axial frame 41, a second axial frame 42 that is slidable relative to the first axial frame 41, and a third axial frame 43 that is slidable relative to the second axial frame 42. Note that the axial frame 4 may also be configured to consist of a first axial frame 41 and a second axial frame 42 that is slidable relative to the first axial frame 41. Furthermore, for example, the axis frame 4 may be configured to further include a fourth axis frame 44 that is slidable relative to the third axis frame 43.

[0051] The first shaft frame 41 is composed of an upper flange 411, a middle flange 412, a lower flange 413, and a plurality of flange fixing members 45 that connect and fix each of the three flanges arranged in three stages. Instead of flange fixing members 45, plate-shaped members may be used to connect each of the three flanges arranged in three stages. The same applies to the other shaft frames. The upper flange 411 of the first shaft frame is composed of an elongated rectangular plate-shaped member. A rail consisting of a through groove extending in the axial direction (longitudinal direction) is formed at a position slightly eccentric from the central axis of the upper flange 411 of the first shaft frame (upper side of the paper in Figure 14(b)). The claw H421 of the second shaft frame is slidably connected to this rail RH41 of the upper flange of the first shaft frame. The claw H421 of the second shaft frame, although not shown in the figure, has a projection on its side to prevent it from falling off the rail RH41 of the upper flange of the first shaft frame. The other claws are similar. An external connection portion EC is formed at one end (the left end in Figure 14) of the upper flange 411 of the first shaft frame for connecting to the outside of another structure, such as a covering structure 1. At the other end (the right end in Figure 14) of the upper flange 411 of the first shaft frame, an inclined portion S411 of the upper flange of the first shaft frame is formed, which is inclined toward the lower flange. One end (the left side in Figure 14) of the inclined portion S411 of the upper flange of the first shaft frame, two locking recesses RD41 of the first shaft frame are formed, which are connected to a locking projection D421 of the second shaft frame. The rail RH41 of the upper flange of the first shaft frame extends to the inclined portion S411 of the upper flange of the first shaft frame, and a claw H41 of the first shaft frame is formed below the inclined portion S411 of the upper flange of the first shaft frame and near the rail RH41 of the upper flange of the first shaft frame, which is slidably connected to the rail RH423 of the lower flange of the second shaft frame. On the other end (right side in Figure 14) of the inclined portion S411 of the upper flange of the first shaft frame, two locking protrusions D41 of the first shaft frame are formed, which connect to the locking recess RD423 of the second shaft frame.Near both longitudinal edges of the upper flange 411 of the first shaft frame, flange fixing member holes WH are formed at predetermined intervals for fixing flange fixing members 45. The flange fixing member holes WH of the upper flange of the first shaft frame correspond to the positions of the flange fixing member holes WH of the middle flange of the first shaft frame.

[0052] The middle flange 412 of the first shaft frame is composed of an elongated rectangular plate-like member. The middle flange 412 of the first shaft frame is formed to be shorter than the upper flange 411 and the lower flange 413 of the first shaft frame. At one end of the middle flange 412 of the first shaft frame (left side in Figure 14), there are two brace connection parts BC412 of the middle flange of the first shaft frame, which are through holes for rotatably connecting the brace 8 via a pin P1. The inner diameter of the brace connection parts BC412 of the middle flange of the first shaft frame is designed to match the outer diameter of the pin shaft P1a (see Figure 20). The same applies to the other brace connection parts. In addition, near the brace connection parts BC412 of the middle flange of the first shaft frame, there is a brace connection rail BR41 of the middle flange of the first shaft frame, which is a through groove that extends axially (longitudinal direction) and connects the brace 8 rotatably and slidably via a pin P1. The width of the brace connection rail BR41 on the middle flange of the first axis frame is designed to match the outer diameter of the pin shaft P1a (see Figure 20). The same applies to the other brace connection rails. Near both longitudinal edges and near the central axis of the middle flange 412 of the first axis frame, flange fixing member holes WH are formed at predetermined intervals for fixing flange fixing members 45. The flange fixing member holes WH formed near both longitudinal edges of the middle flange of the first axis frame correspond to the positions of the flange fixing member holes WH on the upper flange of the first axis frame. Also, the flange fixing member holes WH formed near the central axis of the middle flange of the first axis frame correspond to the positions of the flange fixing member holes WH on the lower flange of the first axis frame.

[0053] The lower flange 413 of the first shaft frame is composed of an elongated rectangular plate-like member. At one end of the lower flange 413 of the first shaft frame (left side in Figure 14), an inclined portion S413 of the lower flange of the first shaft frame is formed, which is inclined toward the upper flange. On the other end of the inclined portion S413 of the lower flange of the first shaft frame, an external connection portion EC is formed for connecting to other structures, such as the covering structure 1. In addition, on the other end of the lower flange 413 of the first shaft frame (right side in Figure 14), two brace connection portions BC413 of the lower flange of the first shaft frame are formed, for rotatably connecting the brace 8. The brace connection portions BC413 of the lower flange of the first shaft frame correspond to the position of the brace connection portion BC412 of the middle flange of the first shaft frame. Furthermore, two brace lock holes PR413 are formed in the lower flange of the first axis frame at a position corresponding to one end (left side in Figure 14) of the brace connection rail BR41 on the middle flange of the first axis frame, for locking the brace 8 in the deployed state. Near the brace lock holes PR413 in the lower flange of the first axis frame, a connection hole PC413 for the connection plate is formed in the lower flange of the first axis frame for connecting the connection plate 5. At the other end (right side in Figure 14) of the lower flange of the first axis frame, a claw opening HO413 is formed in the lower flange of the first axis frame through which the claw H423 of the lower flange of the second axis frame passes. Near the central axis of the lower flange 413 of the first axis frame, flange fixing member holes WH are formed at predetermined intervals for fixing the flange fixing member 45. The flange fixing member holes WH formed near the central axis of the lower flange of the first axis frame correspond to the positions of the flange fixing member holes WH on the middle flange of the first axis frame.

[0054] The second shaft frame 42 is composed of an upper flange 421, a middle flange 422, a lower flange 423, and a plurality of flange fixing members 45 that connect and fix each of the three flanges arranged in three stages. The upper flange 421 of the second shaft frame is composed of an elongated rectangular plate-like member. At one end of the upper flange of the second shaft frame (left side in Figure 15), there is an opening HO421 for the claw of the lower flange of the second shaft frame through which the claw H421 of the upper flange of the second shaft frame passes. Near the central axis of the upper flange 421 of the second shaft frame, there is a rail formed from a through groove that extends in the axial direction (longitudinal direction). The claw H43 of the third shaft frame is slidably connected to this rail RH421 of the upper flange of the second shaft frame. At the other end of the upper flange 421 of the second shaft frame (right side in Figure 15), there is an inclined portion S421 of the upper flange of the second shaft frame that slopes toward the lower flange. On one end of the upper flange of the second axis frame (left side in Figure 15) beyond the inclined portion S421, two locking recesses RD423 of the second axis frame are formed, which connect to the locking projection D43 of the third axis frame. The rail RH421 of the upper flange of the second axis frame extends to the inclined portion S421 of the upper flange of the second axis frame, and a claw H421 of the second axis frame is formed on the inclined portion S421 of the upper flange of the second axis frame, and above the rail RH421 of the upper flange of the second axis frame, which is slidably connected to the rail RH433 of the lower flange of the third axis frame. On the other end of the upper flange of the second axis frame beyond the inclined portion S421, two locking projections D421 of the second axis frame are formed, which connect to the locking recesses RD433 of the third axis frame. Near both longitudinal edges of the upper flange 421 of the second axis frame, flange fixing member holes WH are formed at predetermined intervals for fixing flange fixing members 45. The flange fixing member hole WH on the upper flange of the second shaft frame corresponds to the position of the flange fixing member hole WH on the middle flange of the second shaft frame.

[0055] The middle flange 422 of the second shaft frame is composed of an elongated rectangular plate-like member. The middle flange 422 of the second shaft frame is shorter than the upper flange 421 and the lower flange 423 of the second shaft frame. At one end of the middle flange 422 of the second shaft frame (left side in Figure 15), a brace connection rail BR422 for the middle flange of the second shaft frame is formed, extending in the axial direction (longitudinal direction) and connecting the brace 8 in a rotatable and slidable manner. At the other end of the middle flange 422 of the second shaft frame (right side in Figure 15), two brace connection portions BC422 for the middle flange of the second shaft frame are formed, connecting the brace 8 in a rotatable manner. In addition, holes WH for flange fixing members are formed near both longitudinal edges of the middle flange 422 of the second shaft frame at predetermined intervals for fixing flange fixing members 45. The flange fixing member holes WH in the middle flange of the second shaft frame correspond to the flange fixing member holes WH in the upper flange of the second shaft frame and the flange fixing member holes WH in the lower flange of the second shaft frame.

[0056] The lower flange 423 of the second shaft frame is composed of an elongated rectangular plate-like member. At one end of the lower flange 423 of the second shaft frame (left side in Figure 15), an inclined portion S423 of the lower flange of the second shaft frame is formed, which slopes toward the upper flange. On the other end of the lower flange of the second shaft frame (right side in Figure 15), two locking recesses RD423 of the lower flange of the second shaft frame are formed, which connect to the locking projection D41 of the first shaft frame. Near the locking recesses RD423 of the lower flange of the second shaft frame, two brace lock holes PR423 of the lower flange of the second shaft frame are formed at positions corresponding to one end of the brace connection rail BR422 of the middle flange of the second shaft frame (left side in Figure 15), for locking the brace 8 in the deployed state. The inner diameter of the brace lock holes PR423 of the lower flange of the second shaft frame is designed to match the outer diameter of the shaft portion of the pin P1. The same applies to the other brace lock holes. The tip of the shaft portion of pin P1 is housed in the brace lock hole PR423 of the lower flange of the second shaft frame, thereby restricting the sliding of the brace 8. Additionally, two brace connection portions BC423 are formed on the other end of the lower flange 423 of the second shaft frame, for rotatably connecting the brace 8. The brace connection portions BC423 of the lower flange of the second shaft frame correspond to the position of the brace connection portion BC422 of the middle flange of the second shaft frame. At the other end of the lower flange of the second shaft frame (right side in Figure 15), an opening HO423 for the claw of the lower flange of the second shaft frame is formed, through which the claw H43 of the lower flange of the third shaft frame passes. Furthermore, a rail consisting of a through groove extending axially (longitudinally) is formed near the central axis of the lower flange 423 of the second shaft frame. The claw H41 of the first shaft frame is slidably connected to this rail RH423 of the lower flange of the second shaft frame. Near the rail RH423 of the lower flange of the second shaft frame, a claw H423 of the lower flange of the second shaft frame is formed, which is slidably connected to the rail RH41 of the upper flange of the first shaft frame. Near both longitudinal edges of the lower flange 423 of the second shaft frame, holes WH for flange fixing members are formed at predetermined intervals, for fixing flange fixing members 45.The flange fixing hole WH on the lower flange of the second shaft frame corresponds to the position of the flange fixing hole WH on the middle flange of the second shaft frame.

[0057] The third axis frame 43 is composed of an upper flange 431, a middle flange 432, a lower flange 433, and a plurality of flange fixing members 45 that connect and fix each of the flanges arranged in three stages. Instead of flange fixing members 45, plate-shaped members may be used to connect each of the flanges arranged in three stages. The upper flange 431 of the third axis frame is composed of an elongated rectangular plate-shaped member. At one end of the upper flange of the third axis frame (left side in Figure 16), there is an opening HO431 for the claw of the upper flange of the third axis frame through which the claw H421 of the upper flange of the second axis frame passes. Two rows of brace connection rails BR43 are formed on the upper flange 431 of the third axis frame, extending in the axial direction (longitudinal direction) and connecting the brace 8 so that it can rotate and slide freely. On the other end of the upper flange 431 of the third axis frame (right side in Figure 16), two brace connection portions BC431 are formed for rotatably connecting the brace 8. On the other end of the upper flange 431 of the third axis frame, an external connection portion EC is formed for connecting to other structures, such as the covering structure 1. Near the central axis of the upper flange 431 of the third axis frame, holes WH for fixing flange fixing members 45 are formed at predetermined intervals. The holes WH for flange fixing members on the upper flange of the third axis frame correspond to the positions of the holes WH for flange fixing members on the middle flange of the third axis frame.

[0058] The middle flange 432 of the third axis frame is composed of an elongated rectangular plate-like member. The middle flange 432 of the third axis frame is shorter than the upper flange 431 and the lower flange 433 of the third axis frame. Near the center of the middle flange 432 of the third axis frame, there is a connection hole PC432 for the connection plate of the third axis frame to which the connection plate 5 is connected. At a position corresponding to the other end of the brace connection rail BR43 on the upper flange of the third axis frame, there are two brace lock holes PR432 on the lower flange of the third axis frame that lock the brace 8 in the deployed state. Also, at the other end side of the lower flange 433 of the third axis frame (right side in Figure 16), there are two brace connection parts BC432 on the lower flange of the third axis frame that rotatably connect the brace 8. The brace connection parts BC432 on the lower flange of the third axis frame correspond to the position of the brace connection part BC431 on the upper flange of the third axis frame. Near both longitudinal edges and near the central axis of the middle flange 432 of the third axis frame, flange fixing member holes WH are formed at predetermined intervals for fixing flange fixing members 45. The flange fixing member holes WH formed near both longitudinal edges of the middle flange of the third axis frame correspond to the positions of the flange fixing member holes WH of the upper flange of the third axis frame. Furthermore, the flange fixing member holes WH formed near the central axis of the middle flange of the third axis frame correspond to the positions of the flange fixing member holes WH of the lower flange of the third axis frame.

[0059] The lower flange 433 of the third axis frame is composed of an elongated rectangular plate-like member. At one end of the lower flange 433 of the third axis frame (left side in Figure 16), an inclined portion S433a of the lower flange of the third axis frame is formed, which is inclined toward the upper flange. On the other end of the inclined portion S433a of the lower flange of the third axis frame, two locking recesses RD433 of the lower flange of the third axis frame are formed, which are connected to the locking projection D421 of the second axis frame. In addition, a rail consisting of a through groove extending in the axial direction (longitudinal direction) is formed on the central axis of the lower flange 433 of the third axis frame. The claw H421 of the second axis frame is slidably connected to this rail RH433 of the lower flange of the third axis frame. At one end and on the lower side of the rail RH433 of the lower flange of the third axis frame, a claw H43 of the lower flange of the third axis frame is formed, which is slidably connected to the rail RH421 of the upper flange of the second axis frame. On the other end of the lower flange of the third axis frame (right side in Figure 16), an inclined portion S433b is formed that slopes toward the upper flange. Furthermore, on the other end, an external connection portion EC is formed for connecting to other structures, such as the covering structure 1. In addition, near both longitudinal edges of the lower flange 433 of the third axis frame, holes WH for fixing flange fixing members 45 are formed at predetermined intervals. The holes WH for flange fixing members in the lower flange of the third axis frame correspond to the positions of the holes WH for flange fixing members in the middle flange of the third axis frame.

[0060] Figure 17 shows a diagram illustrating the first rotating frame of the frame structure according to the third embodiment. Figure 18 shows a diagram illustrating the second rotating frame of the frame structure according to the third embodiment. In Figures 17 and 18, (a) is a plan view of the upper flange, (b) is a longitudinal elevation view, and (c) is a plan view of the lower flange. One end of the first rotating frame 6 and the second rotating frame 7 can be connected to the outside of another structure, such as a covering structure 1. The other ends of the first rotating frame 6 and the second rotating frame 7 are connected to a connecting plate 5 which is connected to the first axis frame 41 and the third axis frame 43, and are supported by a plurality of braces 8.

[0061] The first rotating frame 6 is composed of an upper flange 61, a lower flange 62, and a plurality of flange fixing members 45 that connect and fix the flanges arranged in two stages. The upper flange 61 of the first rotating frame is composed of an elongated rectangular plate-like member. An external connection part EC is formed at one end (left side in Figure 17) for connecting to the outside of another structure, such as a covering structure 1. Two brace connection rails BR61a and 61b are formed at an eccentric position from the central axis of the upper flange 61 of the first rotating frame (upper side of the paper in Figure 17(a)), consisting of through grooves extending in the axial direction (longitudinal direction), to connect the brace 8 rotatably and slidably. The width of the brace connection rails BR61a and 61b of the upper flange of the first rotating frame is designed to match the outer diameter of the shaft portion of the pin P1. The same applies to the brace connection rails of the upper flanges of the other rotating frames. Braces 8, 8 are connected to the brace connection rails BR61a, BR61b of the upper flange of the first rotating frame, respectively, via the shaft frame 4 and the branching plate 9. Offset from the central axis of the upper flange 61 of the first rotating frame (lower side of the paper in Figure 17(a)), a rail BR61c is formed, which is slightly shorter than the brace connection rail BR61a of the upper flange of the first rotating frame and consists of a through groove, allowing the brace 8 to be connected rotatably and slidably. A brace 8 is connected to the brace connection rail BR61c of the upper flange of the first rotating frame via the second rotating frame 7 and the branching plate 9. Coaxially with the brace connection rail BR61c of the upper flange of the first rotating frame, and at the other end, a brace connection portion BC61 of the upper flange of the first rotating frame is formed, which allows the brace 8 to be connected rotatably. A brace 8, which is connected to the second rotating frame 7 via a branch plate 9, is connected to the brace connection portion BC61 of the upper flange of the first rotating frame. The other end of the upper flange 61 of the first rotating frame has a sloping portion that inclines toward the lower flange, and is further tapered in order to suppress interference with the shaft frame 4 and the second rotating frame 7 when folded.Furthermore, at the other end of the upper flange 61 of the first rotating frame, a connecting portion RC6 of the upper flange of the first rotating frame is formed, which is rotatably connected to the connecting plate 5 connected to the first shaft frame 41 and the third shaft frame 43 by a connecting member 10. The connecting member 10 is made up of bolts and nuts. Near the longitudinal central axis of the upper flange 61 of the first rotating frame, flange fixing member holes WH are formed at predetermined intervals for fixing flange fixing members 45. The flange fixing member holes WH of the upper flange of the first rotating frame correspond to the positions of the flange fixing member holes WH of the lower flange of the first rotating frame.

[0062] The lower flange 62 of the first rotating frame is composed of an elongated rectangular plate-like member. One end (left side in Figure 17) has an inclined portion that slopes toward the upper flange, and an external connection portion EC is formed for connecting to the outside of other structures, such as the covering structure 1. Two brace connection rails BR62a and 62b of the lower flange of the first rotating frame are formed at an eccentric position from the central axis of the upper flange 61 of the first rotating frame (upper side of the paper in Figure 16(a)), as rails extending in the axial direction (longitudinal direction), for connecting the brace 8 in a rotatable and slidable manner. The brace connection rails BR62a and 62b of the lower flange of the first rotating frame correspond to the brace connection rails BR62a and 62b of the upper flange of the first rotating frame, respectively. The brace connection rails BR62a and 62b of the lower flange of the first rotating frame are formed as guide rails that protrude toward the upper flange side beyond the upper surface of the lower flange of the first rotating frame. The width of the brace connection rails BR62a and BR62b on the lower flange of the first rotating frame is designed to match the outer diameter of the shaft of pin P1. The same applies to the brace connection rails on the lower flanges of the other rotating frames. At the other ends of the brace connection rails BR62a and BR62b on the lower flange of the first rotating frame, brace lock holes PR62a and PR62b are formed, respectively, to lock the brace 8 in the deployed state. The inner diameter of the brace lock holes PR62a and PR62b on the lower flange of the first rotating frame is designed to match the outer diameter of the shaft of pin P1. The same applies to the brace lock holes on the lower flanges of the other rotating frames. The sliding of the brace 8 is restricted when the tip of the shaft of pin P1 is accommodated in the brace lock holes PR62a and PR62b on the lower flange of the first rotating frame. Braces 8, 8 are connected to the brace connection rails BR62a, BR62b on the lower flange of the first rotating frame, respectively, via the axle frame 4 and the branch plate 9.At an eccentric position from the central axis of the lower flange 62 of the first rotating frame (towards the bottom of the paper in Figure 16(a)), a rail consisting of a through groove, slightly shorter than the brace connection rail BR62a of the lower flange of the first rotating frame, is formed, which connects the brace 8 rotatably and slidably. At the other end of the brace connection rail BR62c of the lower flange of the first rotating frame, a brace lock hole PR62c of the lower flange of the first rotating frame is formed, which locks the brace 8 in the deployed state. The brace 8, which is connected to the second rotating frame 7 via a branch plate 9, is connected to the brace connection rail BR62c of the lower flange of the first rotating frame. Coaxially with the brace connection rail BR62c of the lower flange of the first rotating frame, and on the other end, a brace connection portion BC62 of the lower flange of the first rotating frame is formed, which connects the brace 8 rotatably. A brace 8, which is connected to the second rotating frame 7 via a branch plate 9, is connected to the brace connection portion BC62 of the lower flange of the first rotating frame. The other end of the lower flange 62 of the first rotating frame is tapered to suppress interference with the shaft frame 4 and the second rotating frame 7 when folded. Also, at the other end of the lower flange 62 of the first rotating frame, a connection portion RC6 of the upper flange of the first rotating frame, which consists of a through hole, is formed, and is rotatably connected to the connection plate 5 connected to the first shaft frame 41 or the third shaft frame 43 by a connecting member 10. Near the longitudinal central axis of the lower flange 62 of the first rotating frame, holes WH for fixing flange fixing members 45 are formed at predetermined intervals. The positions of the holes WH for flange fixing members in the lower flange of the first rotating frame correspond to the positions of the holes WH for flange fixing members in the upper flange of the first rotating frame.

[0063] The second rotating frame 7 is composed of an upper flange 71, a lower flange 72, and a plurality of flange fixing members 45 that connect and fix the flanges arranged in two stages. The upper flange 71 of the second rotating frame is composed of an elongated rectangular plate-like member. An external connection part EC is formed at one end (left side in Figure 18) for connecting to the outside of another structure, such as a covering structure 1. An eccentric position from the central axis of the upper flange 71 of the second rotating frame (upper side of the paper in Figure 18(a)) is formed as a rail consisting of a through groove extending in the axial direction (longitudinal direction), to which the brace 8 is connected rotatably and slidably. The width of the brace connection rail BR71a of the upper flange of the second rotating frame is designed to match the outer diameter of the shaft portion of the pin P1. A brace 8, which is connected to the first rotating frame 6 via a branch plate 9, is connected to the brace connection rail BR71a of the upper flange of the second rotating frame. Offset from the central axis of the upper flange 71 of the second rotating frame (at the bottom of the paper in Figure 18(a)), and shifted to one end side of the brace connection rail BR71a of the upper flange of the second rotating frame, a rail consisting of a through groove is formed, which connects the brace 8 rotatably and slidably. A brace 8, which is connected to the second axis frame 42 via a branch plate 9, is connected to the brace connection rail BR71c of the upper flange of the second rotating frame. On the same axis as the brace connection rail BR71a of the upper flange of the second rotating frame, and at the other end, a brace connection portion BC71 of the upper flange of the second rotating frame is formed, which connects the brace 8 rotatably. A brace 8, which is connected to the first rotating frame 6 via a branch plate 9, is connected to the brace connection portion BC71 of the upper flange of the second rotating frame. The other end of the upper flange 71 of the second rotating frame has a sloping portion that inclines toward the lower flange, and is further tapered to suppress interference with the shaft frame 4 and the second rotating frame 7 when folded.Furthermore, at the other end of the upper flange 71 of the second rotating frame, a connecting portion RC6 of the upper flange of the first rotating frame, consisting of a through hole, is formed, which is rotatably connected to the connecting plate 5 connected to the first shaft frame 41 and the third shaft frame 43 by a connecting member 10. Near the longitudinal central axis of the upper flange 71 of the second rotating frame, flange fixing member holes WH are formed at predetermined intervals for fixing flange fixing members 45. The flange fixing member holes WH of the upper flange of the second rotating frame correspond to the positions of the flange fixing member holes WH of the lower flange of the second rotating frame.

[0064] The lower flange 72 of the second rotating frame is composed of an elongated rectangular plate-like member. One end (the left side in Figure 18) has an inclined portion that slopes toward the upper flange, and an external connection portion EC is formed for connecting to the outside of other structures, such as the covering structure 1. An eccentric position from the central axis of the upper flange 71 of the second rotating frame (upper side of the paper in Figure 17(a)) is formed as a rail extending in the axial direction (longitudinal direction), which connects the brace 8 to it in a rotatable and slidable manner, and is the brace connection rail BR72a of the lower flange of the second rotating frame. The brace connection rail BR72a of the lower flange of the second rotating frame corresponds to the brace connection rail BR71a of the upper flange of the second rotating frame. The brace connection rail BR72a of the lower flange of the second rotating frame is formed as a guide rail that protrudes toward the upper flange side beyond the upper surface of the lower flange of the second rotating frame. The width of the brace connection rail BR72a on the lower flange of the second rotating frame is designed to match the outer diameter of the shaft of pin P1. At the other end of the brace connection rail BR72a on the lower flange of the second rotating frame, a brace lock hole PR72a is formed on the lower flange of the second rotating frame, which locks the brace 8 in the deployed state. The inner diameter of the brace lock hole PR72a on the lower flange of the second rotating frame is designed to match the outer diameter of the shaft of pin P1. The sliding of the brace 8 is restricted when the tip of the shaft of pin P1 is accommodated in the brace lock hole PR72a on the lower flange of the second rotating frame. The brace 8, which is connected to the first rotating frame 6 via the branch plate 9, is connected to the brace connection rail BR72a on the lower flange of the second rotating frame. At an eccentric position from the central axis of the lower flange 72 of the second rotating frame (towards the bottom of the paper in Figure 17(a)), a rail consisting of a through groove is formed, located at one end of the brace connection rail BR72a of the lower flange of the second rotating frame. This rail connects the brace 8 to the lower flange of the second rotating frame in a rotatable and slidable manner. At the other end of the brace connection rail BR72c of the lower flange of the second rotating frame, a brace lock hole PR72c of the lower flange of the second rotating frame is formed to lock the brace 8 in the deployed state.A brace 8, which is connected to the second axle frame 42 via a branch plate 9, is connected to the brace connection rail BR72c of the lower flange of the second rotating frame. Coaxial with the brace connection rail BR72c of the lower flange of the second rotating frame, and on the other end, a brace connection portion BC72 of the lower flange of the second rotating frame is formed to rotatably connect the brace 8. A brace 8, which is connected to the first rotating frame 6 via a branch plate 9, is connected to the brace connection portion BC72 of the lower flange of the second rotating frame. The other end of the lower flange 72 of the second rotating frame is tapered to suppress interference with the axle frame 4 and the first rotating frame 6 when folded. In addition, a connection portion RC6 of the lower flange of the second rotating frame, which consists of a through hole, is formed at the other end of the lower flange 72 of the second rotating frame, and is rotatably connected to a connection plate 5 connected to the first axle frame 41 or the third axle frame 43 by a connecting member 10. Near the longitudinal central axis of the lower flange 72 of the second rotating frame, flange fixing member holes WH are formed at predetermined intervals for fixing flange fixing members 45. The flange fixing member holes WH of the lower flange of the second rotating frame correspond to the positions of the flange fixing member holes WH of the upper flange of the second rotating frame.

[0065] Figure 19 shows a side view of an example of a flange fixing member according to the third embodiment. The flange fixing member 445 is composed of a shaft portion 45a of the flange fixing member, a head portion 45b of the flange fixing member formed at the base end of the shaft portion 45a of the flange fixing member and protruding laterally from the shaft portion 45a of the flange fixing member, a pair of fixing portions 45c of first flange fixing members provided in the middle of the shaft portion 45a of the flange fixing member and protruding laterally from the shaft portion 45a of the flange fixing member, and a pair of fixing portions 45d of second flange fixing members provided on the tip side of the shaft portion 45a of the flange fixing member and protruding laterally from the shaft portion 45a of the flange fixing member. The fixing portions 45c of the pair of first flange fixing members and the fixing portions 45d of the pair of second flange fixing members are detachably attached to the shaft portion 45a of the flange fixing member. The flange fixing member 45 fixes the flanges of the first shaft frame 41, the second shaft frame 42, and the third shaft frame 43 to each other, and the flanges of the first rotating frame 6 and the second rotating frame to each other. Using the first shaft frame 41 as an example, the shaft portion 45a of the flange fixing member is inserted into the hole WH for the flange fixing member, the head portion 45b of the flange fixing member contacts the upper flange 411 of the first shaft frame, the middle flange 412 of the first shaft frame is sandwiched between the fixing portions 45c of the pair of first flange fixing members, and the lower flange 413 of the first shaft frame is sandwiched between the fixing portions 45d of the pair of second flange fixing members. The length of the shaft portion 45a of the flange fixing member can be appropriately changed depending on the spacing between the flanges to be fixed. Furthermore, when fixing two stages of flanges, as in the first rotating frame 6, the fixing portions 45d of the pair of second flange fixing members can be omitted. Also, for example, when fixing four stages of flanges, a configuration further including the fixing portions of a pair of third flange fixing members can be used, and the number of fixing portions of a pair of flange fixing members can be appropriately changed depending on the number of stages of flanges to be fixed.

[0066] Figure 20 shows a side view of an example of a pin according to the third embodiment. The pin P1 is composed of a pin shaft P1a, a pin head P1b formed at the base end of the pin shaft P1a and protruding laterally from the pin shaft P1a, and a pin protrusion P1c provided on the tip side of the pin shaft P1a and protruding laterally from the pin shaft P1a. The pin protrusion P1c is detachably attached to the pin shaft P1a. A protrusion to prevent detachment may be detachably provided at the tip of the pin shaft P1a. The pin P1 connects the brace 8 to the first axis frame 41, the second axis frame 42, the third axis frame 43, the first rotation frame 6, and the second rotation frame 7 in a rotatable, slidable, and rotatable manner. For example, to describe an example of a connection that is rotatable without sliding, in the first axis frame 41, the shaft portion P1a of the pin penetrates and is fixed through the brace connection portion BC412 of the middle flange of the first axis frame, the brace 8, and the brace connection portion BC413 of the lower flange of the first axis frame. At that time, the positional relationship from top to bottom is the head of the pin P1b, the brace connection portion BC412 of the middle flange of the first axis frame, the brace 8, the protrusion of the pin P1c, and the brace connection portion BC413 of the lower flange of the first axis frame. To describe an example of a connection that is both slidable and rotatable, in the first axis frame 41, for example, in the folded state or in the process of unfolding, the shaft portion P1a of the pin penetrates the brace connection rail BR41 of the middle flange of the first axis frame and the brace 8, and the pin P1 can slide along the brace connection rail BR41 of the middle flange of the first axis frame with the head of the pin P1b separated from the brace connection rail BR41 of the middle flange of the first axis frame (floating state). In the deployed state, the shaft portion P1a of the pin penetrates the brace connection rail BR41 on the middle flange of the first axis frame, the brace 8, and the brace lock hole PR413 on the lower flange of the first axis frame. The tip of the pin P1 is housed in the brace lock hole PR413 on the lower flange of the first axis frame, restricting its sliding. In other words, the deployed state is fixed (locked). The form of the pin P1 is not limited to the above. For example, the pin P1 may be configured to further include a restricting portion that clamps onto the flange or brace. By including a restricting portion, the pin P1 can slide more smoothly.Alternatively, for example, a step may be formed in the brace lock hole PR413 of the lower flange of the first shaft frame, with the inner side matching the outer diameter of the pin's shaft portion P1a and the front side matching the outer diameter of the pin's protrusion P1c. This allows for more stable locking.

[0067] Furthermore, to describe another example of a connection that is both slidable and rotatable, in the case of the first rotating frame 6, when it is folded or partially unfolded, the shaft portion P1a of the pin passes through the brace connection rail BR61a and the brace 8 on the upper flange of the first rotating frame. With the head P1b of the pin detached from the brace connection rail BR61a on the upper flange of the first rotating frame (floating), it is slidable along the brace connection rail BR61a on the upper flange of the first rotating frame and the brace connection rail BR62a on the lower flange of the first rotating frame. In the unfolded state, the shaft portion P1a of the pin passes through the brace connection rail BR61a on the upper flange of the first rotating frame, the brace 8, and the brace lock hole PR62a on the lower flange of the first rotating frame, and the tip of the pin P1 is housed in the brace lock hole PR62a on the lower flange of the first rotating frame, restricting its sliding. In other words, the unfolded state is fixed (locked).

[0068] Figure 21 shows a plan view of the connecting plate of the axial frame of the frame structure according to the third embodiment. The connecting plate 5 is rectangular, and one side is connected by a fixing member to the connecting hole PC413 for the connecting plate on the lower flange of the first axial frame and to the connecting hole PC432 for the connecting plate on the lower flange of the third axial frame. The first rotating frame 6 and the second rotating frame 7 are rotatably connected to the side opposite to the one side. The side to which the first rotating frame 6 and the second rotating frame 7 are connected is formed as a slanted side in order to suppress interference between the first rotating frame 6 and the second rotating frame 7 when the frame is folded.

[0069] Figure 22 shows a plan view of an example of a brace in a frame structure according to the third embodiment. The brace 8 comprises a shaft portion 81, a one-end connection portion 82, and a other-end connection portion 83. The length of the shaft portion 81 of the brace is appropriately designed at each connection point so that, in the folded state, the first rotating frame 6, the second rotating frame 7, and the brace 8 are aligned with the shaft frame 4. The one-end connection portion 82 of the brace is rotatably or slidably connected to the shaft frame 4, the first rotating frame 6, and the second rotating frame 7. The other-end connection portion 83 of the brace is rotatably connected to the branch plate.

[0070] Figure 23 shows a plan view of an example of a branch plate of a frame structure according to the third embodiment. The branch plate 9 is rectangular, and the other end connection portion 83 of the brace is connected near the corner. The shape of the branch plate 9 is not limited to the above. It may be a triangle, a pentagon, or other polygon, or a circle. The number of branches is not limited to four. The number of branches may be two, three, five or more. The number, length, etc. of the braces 8 are designed appropriately according to the number of branches.

[0071] <Effects of the frame structure> The frame structure 3 according to the third embodiment comprises an axis frame 4 which includes a first axis frame 41, a second axis frame 42 that is slidable relative to the first axis frame 41, and a third axis frame 43 that is slidable relative to the second axis frame 42, and is extendable and retractable in the axial direction. Therefore, in the folded state, the frame structure 3 according to the third embodiment folds so that the first axis frame 41, the second axis frame 42, and the third axis frame 43 overlap vertically. In addition, since the first rotation frame 6 and the second rotation frame 7 connected to the axis frame 4 are positioned along the axial direction of the axis frame 4, the folded state becomes very compact. Because they fold so that they overlap vertically, it becomes possible to utilize the space in the direction perpendicular to the axis frame 4 (height direction). As a result, in the folded state, the braces 8, branch plates 9, and rotation frames (first rotation frame 6, second rotation frame 7) connected to the first axis frame 41, the second axis frame 42, and the third axis frame 43 are located at different heights. As a result, interference between the brace 8, branch plate 9, and rotating frame (first rotating frame 6, second rotating frame 7) is suppressed when the frame is folded, making it possible to fold it compactly.

[0072] Furthermore, in the unfolded state, the first rotating frame 6 and the second rotating frame 7 are positioned in directions different from the axial direction of the axis frame 4, providing a larger frame structure 3 compared to the folded state. In addition, the rigidity is improved by providing multiple braces 8. Moreover, by providing a branching plate 9 to which one end of the multiple braces 8 is connected, the multiple braces 8 can be positioned along the axial direction of the axis frame 4 in the folded state, making folding easier. In other words, it is possible to provide a frame structure 3 that is highly rigid and has a high degree of freedom in terms of external shape and folded state.

[0073] Furthermore, for example, in the deployed state, the shaft portion P1a of the pin penetrates the brace connection rail BR41 of the middle flange of the first axis frame, the brace 8, and the brace lock hole PR413 of the lower flange of the first axis frame, and the tip of the pin P1 is housed in the brace lock hole PR413 of the lower flange of the first axis frame, restricting its sliding. In other words, the deployed state is fixed (locked). That is, by providing a locking mechanism including a pin and a lock hole, the rigidity in the deployed state can be improved. In other words, a frame structure 3 can be provided that is highly rigid and has a high degree of freedom in its external shape and folded state.

[0074] <Fourth Embodiment> <Shelter configuration> Figure 24 shows a perspective view of an example of a shelter according to the fourth embodiment. Figure 25 shows an unfolded view of the upper part of the covering structure according to the fourth embodiment. The shelter SH1 according to the fourth embodiment is constructed by combining the frame structure 3 described earlier with a covering structure 1b having the same function as the covering structure 1. The covering structure 1b is constructed by connecting the upper part of the covering structure 1b shown in Figure 25 with the lower part of the covering structure 1b (not shown). The frame structure 3 and the covering structure 1b are connected by connecting the external connection part EC of the frame structure 3 to the boundary portion between the upper and lower parts of the covering structure 1b.

[0075] The covering structure 1b according to the fourth embodiment is formed by bending a flat metal plate 11 to create a space inside. The covering structure 1b is formed by appropriately combining mountain folds and valley folds at multiple points so that it can transition from a folded state to an unfolded state without breaking. A mountain fold is a bent section in which the folds (first bend section, second bend section) are on the outside. A valley fold is a bent section in which the folds (first bend section, second bend section) are hidden on the inside. The various conditions of the metal plate 11 constituting the covering structure 1b (thickness, material, elongation performance, etc.), the radius of curvature of the first bend section, and the radius of curvature of the second bend section can be configured in the same way as the covering structure according to the first embodiment.

[0076] Furthermore, the covering structure 1b according to the fourth embodiment has a plurality of protrusions 15 formed at predetermined intervals so as not to overlap with the mountain and valley folds. The conditions (shape, depth, outer diameter) of the protrusions 15 are the same as those of the covering structure 1a according to the second embodiment. Note that the dimensions, number and size of the protrusions 15 shown in Figure 25 are for illustrative purposes only.

[0077] <Effects of Shelta> The shelter SH1 according to the fourth embodiment is formed from a single metal plate 11, and therefore has superior strength and airtightness compared to conventional structures in which the bent portion is made of a different material or other component such as a hinge fitting. Furthermore, by using an aluminum alloy for the metal plate 11, setting the thickness of the metal plate 11 to 0.2 mm to 5 mm, the elongation performance of the metal plate 11 to 10% or more, designing the radius of curvature of the first bent portion 12 to 50 times the thickness of the flat plate member, and the radius of curvature of the second bent portion 13 to 100 times the radius of curvature of the first bent portion 12, the bent portion can be unfolded without breaking. In addition, the strength can be further improved by providing multiple protrusions 15. Furthermore, by providing multiple protrusions 15, the axial stiffness in the cross-section of the metal plate 11 can be reduced compared to the case without protrusions 15. As the axial stiffness decreases, the surface of the metal plate 11 becomes more susceptible to contraction, and the metal plate 11 becomes a structure that is prone to jump buckling (phenomenon). On the other hand, the bending rigidity of the metal plate 11 can be increased compared to the case without the uneven portion 15, making it less susceptible to so-called Euler buckling. As a result, the metal plate 11 has a structure that is prone to jump buckling (phenomenon). Therefore, the shelter SH1 can be easily deployed. By setting the outer diameter of the uneven portion 15 and the thickness of the metal plate 11 to predetermined values, the metal plate 11 becomes less prone to fracture, and its strength can be further improved.

[0078] Furthermore, in the fourth embodiment, the shelter SH1 is extremely compact in the folded state because, in the folded state, the first rotating frame 6 and the second rotating frame 7 connected to the axis frame 4 are positioned along the axial direction of the axis frame 4. In the unfolded state, the first rotating frame 6 and the second rotating frame 7 are positioned in directions different from the axial direction of the axis frame 4, providing a larger frame structure compared to the folded state. In addition, rigidity is improved by providing multiple braces 8. Moreover, by providing a branching plate 9 to which one end of the multiple braces 8 is connected, the multiple braces 8 can be positioned along the axial direction of the axis frame 4 in the folded state, making folding easier. In other words, it is possible to provide a frame structure 3 that is highly rigid and has a high degree of freedom in its external shape and folded state.

[0079] Furthermore, because the axis frame 4 is extendable and retractable, it is extremely compact in the folded state, while providing a larger frame structure 3 in the unfolded state compared to the folded state. In the unfolded state, the shaft portion P1a of the pin passes through the brace connection rail BR41 of the middle flange of the first axis frame, the brace 8, and the brace lock hole PR413 of the lower flange of the first axis frame, and the tip of the pin P1 is housed in the brace lock hole PR413 of the lower flange of the first axis frame, restricting its sliding (not shown). In other words, the unfolded state is fixed (locked). That is, by providing a locking mechanism including a pin and a lock hole, the rigidity in the unfolded state can be improved. In other words, it is possible to provide a shelter SH1 that is highly rigid and has a high degree of freedom in its external shape and folded state.

[0080] The Shelter SH1 according to the fourth embodiment can be used as a base camp, living space, or greenhouse in outer space. Furthermore, the Shelter SH1 according to the fourth embodiment can also be used as a base camp, living space, greenhouse, or plant factory on Earth.

[0081] <Fifth Embodiment> <Effects of Shelta> Figure 26 shows a perspective view of an example of a shelter according to the fifth embodiment. Figure 27 shows a plan view of the frame structure according to the fifth embodiment. Figure 28 shows an unfolded view of the upper part of the covering structure according to the fifth embodiment. Figure 29 shows an unfolded view of the lower part of the covering structure according to the fifth embodiment. The shelter SH2 according to the fifth embodiment has the same basic structure as the shelter SH1 according to the fourth embodiment, but is designed to be even larger than the shelter SH1 according to the fourth embodiment. The shelter SH2 according to the fifth embodiment is composed of a frame structure 3a having the same function as the frame and a covering structure 1c having the same function as the covering structure 1. The frame structure 3a and the covering structure 1c are connected by the external connection part EC of the frame structure 3a being connected to the upper and lower boundary portions of the covering structure 1c.

[0082] The covering structure 1c according to the fifth embodiment is formed by bending a flat metal plate 11 to create a space inside. The covering structure 1c is formed by appropriately combining mountain folds and valley folds at multiple points so that it can transition from a folded state to an unfolded state without breaking. A mountain fold is a bent section in which the folds (first bend section, second bend section) are on the outside. A valley fold is a bent section in which the folds (first bend section, second bend section) are hidden on the inside. The various conditions of the metal plate 11 constituting the covering structure 1b (thickness, material, elongation performance, etc.), the radius of curvature of the first bend section, and the radius of curvature of the second bend section can be configured in the same way as the covering structure according to the first embodiment.

[0083] Furthermore, in the fifth embodiment, the covering structure 1c has a plurality of protrusions 15 formed at predetermined intervals so as not to overlap with the mountain and valley folds. The conditions (shape, depth, outer diameter) of the protrusions 15 are the same as those of the covering structure 1a in the second embodiment. Note that the dimensions, number, and size of the protrusions 15 shown in Figures 28 and 29 are for illustrative purposes only.

[0084] Furthermore, the frame structure 3a according to the fifth embodiment is composed of two expandable and contractible axis frames 4, two partially bent expandable and contractible axis frames 4a, a plurality of first rotating frames 6, second rotating frames 7, braces 8, and branching plates 9.

[0085] <Effects of Shelta> The Shelter SH2 according to the fifth embodiment is formed from a single metal plate 11, and therefore has superior strength and airtightness compared to conventional structures in which the bent portion is made of a different material or other component such as a hinge fitting. Furthermore, by using an aluminum alloy for the metal plate 11, setting the thickness of the metal plate 11 to 0.2 mm to 5 mm, the elongation performance of the metal plate 11 to 10% or more, designing the radius of curvature of the first bent portion 12 to 50 times the thickness of the flat plate member, and the radius of curvature of the second bent portion 13 to 100 times the radius of curvature of the first bent portion 12, the bent portion can be unfolded without breaking. In addition, the strength can be further improved by providing multiple protrusions 15. Furthermore, by providing multiple protrusions 15, the axial stiffness in the cross-section of the metal plate 11 can be reduced compared to the case without protrusions 15. As the axial stiffness decreases, the surface of the metal plate 11 becomes more susceptible to contraction, and the metal plate 11 becomes a structure that is prone to jump buckling (phenomenon). On the other hand, the bending rigidity of the metal plate 11 can be increased compared to the case without the uneven surface 15, making it less susceptible to so-called Euler buckling. As a result, the metal plate 11 has a structure that is prone to jump buckling (phenomenon). Therefore, the shelter SH2 can be easily deployed. By setting the outer diameter of the uneven surface 15 and the thickness of the metal plate 11 to predetermined values, the metal plate 11 becomes less prone to fracture, and its strength can be further improved.

[0086] Furthermore, in the fifth embodiment, the shelter SH2 is extremely compact in the folded state because, in the folded state, the first rotating frame 6 and the second rotating frame 7 connected to the axis frame 4 are positioned along the axial direction of the axis frame 4 and axis frame 4a. In the unfolded state, the first rotating frame 6 and the second rotating frame 7 are positioned in a direction different from the axial direction of the axis frame 4 and axis frame 4a, providing a larger frame structure compared to the folded state. In addition, rigidity is improved by providing multiple braces 8. Furthermore, by providing a branching plate 9 to which one end of the multiple braces 8 is connected, the multiple braces 8 can be positioned along the axial direction of the axis frame 4 and axis frame 4a in the folded state, making folding easier. In other words, it is possible to provide a frame structure 3 that is highly rigid and has a high degree of freedom in its external shape and folded state.

[0087] Furthermore, because the axis frame 4 and axis frame 4a are extendable and retractable, the shelter SH2 is extremely compact in the folded state, while being larger in the deployed state compared to the folded state. In the deployed state, the shaft portion P1a of the pin passes through the brace connection rail BR41 on the middle flange of the first axis frame, the brace 8, and the brace lock hole PR413 on the lower flange of the first axis frame, and the tip of the pin P1 is housed in the brace lock hole PR413 on the lower flange of the first axis frame, restricting its sliding (not shown). In other words, the deployed state is fixed (locked). That is, by providing a locking mechanism including a pin and a lock hole, the rigidity in the deployed state can be improved. In other words, the shelter SH2 can be provided with excellent rigidity and a high degree of freedom in its external shape and folded state.

[0088] The Shelter SH2 according to the fifth embodiment can be used as a base camp, living space, or greenhouse in outer space. Furthermore, the Shelter SH2 according to the fifth embodiment can also be used as a base camp, living space, greenhouse, or plant factory on Earth.

[0089] <Sixth Embodiment> <Container device (covering structure)> Figure 30 shows perspective views of the container device according to the sixth embodiment in its folded and unfolded states. Figure 31 shows a top view of the container device according to the sixth embodiment. Figure 32 shows a front view of the container device according to the sixth embodiment. Figure 33 shows a side view of the container device according to the sixth embodiment.

[0090] The container device 1d according to the sixth embodiment is formed by bending a flat metal plate 11 to create a space inside. The container device 1d is formed by appropriately combining mountain folds (widely spaced dotted lines) and valley folds (narrowly spaced dotted lines) at multiple points so that it can transition from a folded state to an unfolded state without breaking. A mountain fold is a bent section where the creases (first bend section, second bend section) are on the outside. A valley fold is a bent section where the creases (first bend section, second bend section) are hidden on the inside. The various conditions of the metal plate 11 constituting the container device 1d (thickness, material, elongation performance, etc.), the radius of curvature of the first bend section, and the radius of curvature of the second bend section can be configured in the same way as the covering structure according to the first embodiment.

[0091] Furthermore, the container device 1d according to the sixth embodiment has multiple recessed and recessed parts 15 formed at predetermined intervals so as not to overlap with the mountain and valley folds. The conditions (shape, depth, outer diameter) of the recessed and recessed parts 15 are the same as those of the covering structure 1a according to the second embodiment. Note that the number and size of the recessed and recessed parts 15 shown in Figures 30 to 33 are for illustrative purposes only.

[0092] <Effects and benefits of container equipment> The container device 1d according to the sixth embodiment is formed from a single metal plate 11, and therefore has superior strength and airtightness compared to conventional structures in which the bent portion is made of a different material or other component such as a hinge fitting. Furthermore, by using an aluminum alloy for the metal plate 11, setting the thickness of the metal plate 11 to 0.2 mm to 5 mm, the elongation performance of the metal plate 11 to 10% or more, designing the radius of curvature of the first bent portion 12 to 50 times the thickness of the flat plate member, and the radius of curvature of the second bent portion 13 to 100 times the radius of curvature of the first bent portion 12, the bent portion can be unfolded without breaking. In addition, the strength can be further improved by providing multiple protrusions 15. Furthermore, by providing multiple protrusions 15, the axial stiffness in the cross-section of the metal plate 11 can be reduced compared to the case without protrusions 15. As the axial stiffness decreases, the surface of the metal plate 11 becomes more susceptible to contraction, and the metal plate 11 becomes a structure that is prone to jump buckling (phenomenon). On the other hand, the bending rigidity of the metal plate 11 can be increased compared to the case without the uneven portion 15, making it less susceptible to so-called Euler buckling. As a result, the metal plate 11 has a structure that is prone to jump buckling (phenomenon). Therefore, the container device 1d can be easily deployed. By setting the outer diameter of the uneven portion 15 and the thickness of the metal plate 11 to predetermined values, the metal plate 11 becomes less prone to fracture, and its strength can be further improved.

[0093] The container device 1d according to the sixth embodiment can be used as a container device for plant cultivation in outer space or on Earth, a transport container device, a storage container device, etc.

[0094] <Test Example 1> In Test Example 1, an aluminum alloy was used to form a primary bend and a secondary bend (see Figure 2, etc.). As a result, it was confirmed that the bend could be unfolded without breaking when the aluminum alloy sheet thickness was 0.2 to 5 mm, the elongation performance of the aluminum alloy was 10% or more, the radius of curvature of the first bend was 5 to 50 times the thickness of the aluminum alloy sheet, and the radius of curvature of the second bend was 10 to 100 times the radius of curvature of the first bend. Figure 34 shows an example of a covering structure related to Test Example 1. It was confirmed that the bend could be unfolded without breaking.

[0095] <Test Example 2> In Test Example 2, an experiment was conducted to form uneven surfaces using an aluminum alloy (see Figure 5, etc.). As a result, it was confirmed that by setting the aluminum alloy plate thickness to 0.2-5 mm, the elongation performance of the aluminum alloy to 10% or more, the outer diameter to 150-200 times the thickness of the metal plate, the depth to 10-20 times the thickness of the metal plate, and the offset spacing to 2-5 times the plate thickness from a virtual reference line passing through the center of the gap between the mold for the convex part and the mold for the concave part, the strength of the covering structure could be further improved, and a structure that was prone to jump-transfer buckling (phenomenon) could be created, enabling the manufacture of an easily deployable covering structure. Figure 35 shows an example of a covering structure related to Test Example 2. In fact, it was confirmed that the strength of the covering structure could be further improved, and a structure that was prone to jump-transfer buckling (phenomenon) could be created, enabling the manufacture of an easily deployable covering structure.

[0096] <Seventh Embodiment> Figure 36 shows an example of the uneven surface of the covering structure according to the seventh embodiment. The uneven surface of the covering structure according to the seventh embodiment is designed based on the parameters shown in equations (1) and (2) and Figure 37. Figure 37 is a diagram illustrating the parameters and equations of the uneven surface according to the seventh embodiment. The uneven surface 15 formed on the covering structure 1 according to the seventh embodiment has a configuration that includes a central part 151 and five elongated parts 152 extending radially from the central part 151. The central part 151 and one end 152a of the elongated part 152 are connected. The other end 152b is formed in a circular shape. The elongated part 152 is formed with the widest width near the center in the axial direction (direction of radial extension), and its width gradually narrows towards one end 152a and the other end 152b. The uneven portion 15 can have an outer diameter 150 to 200 times the thickness of the metal plate 11 and a depth 10 to 20 times the thickness of the metal plate 11. The outer diameter is the diameter of the circle passing through the other end 152b of the elongated portion 152 of the uneven portion 15. The depth is the distance from the surface of the metal plate 11 to the bottom surface of the recess or protrusion.

[0097]

number

[0098] The uneven surface 15 shown in Figure 37 can be expressed in polar coordinates, that is, in the set of (r,θ) (equation (2)) of the distance r from the origin O (equation (1)) and the angle θ from the initial line x. In equations (1) and (2), r is the distance of the uneven surface 15 from the origin O. R1 is the length of the elongated part 152 of the uneven surface 15 (length from the origin O to the tip of the elongated part 152), and can be 80 to 200 times the plate thickness. p is a constant for specifying the shape of the uneven surface 15, and can be 0.56 to 0.68. t is a parameter and can be a value from 0 to 2π. θ is the angle from the initial line x. n is a constant for specifying the shape of the uneven surface 15 and can be a value from 4.0 to 6.0.

[0099] The coating structure according to the seventh embodiment can be manufactured by the method for manufacturing the coating structure according to the second embodiment. The manufacturing flow of the coating structure according to the seventh embodiment is basically the same as the method for manufacturing the coating structure according to the second embodiment, and as shown in Figure 7, it includes a process for forming uneven parts 15 (S10), a process for forming a first bent part 12 with a predetermined radius of curvature (S01), and a process for forming a second bent part 12 after the formation of the first bent part 12, by further bending the first bent part 12 in a different direction from the first bent part with a larger radius of curvature than the first bent part to form a second bent part (S02).

[0100] In the process of forming the uneven portion (S10), the uneven portion 15 is formed by sandwiching the metal plate 11 between the recess mold 17 and the convex portion mold 18 and pressing it. Here, Figure 38 shows a plan view of the recess mold according to the seventh embodiment. Also, Figure 39 shows a plan view of the convex portion mold according to the seventh embodiment. The recess mold 17 shown in Figure 38 is made of wood and has a petal-shaped recess in the center. The recess mold 17 is rectangular and has through holes formed at the four corners through which fixing members (such as screws) pass. Also, the convex portion mold 18 shown in Figure 39 is made of wood and has a petal-shaped convex portion in the center. The convex portion mold 18 is rectangular and has through holes formed at the four corners through which fixing members (such as screws) pass. In the seventh embodiment, the outer diameter of the petal shape that forms the recess is formed to be larger than the outer diameter of the petal shape that forms the convex portion. The outer diameter of the petal shape forming the recess and the outer diameter of the petal shape forming the convex portion can be designed to be 150 to 200 times the thickness of the metal plate 11, and the depth can be designed to be 10 to 20 times the thickness of the metal plate 11. The difference between the outer diameter of the petal shape forming the recess and the outer diameter of the petal shape forming the convex portion, in other words, the distance between the wall surface of the recess mold and the wall surface of the convex portion mold corresponds to the offset interval of the present invention. The offset interval is the distance between the two dotted lines extending vertically in Figure 10. Preferably, the offset interval is set to a distance from a virtual reference line (shown as a dashed line in Figure 10) passing through the center of the gap between the convex portion mold and the recess mold, and the distance from this virtual reference line is 2 to 5 times the plate thickness. The plate thickness can be 0.2 mm to 5 mm. The recess mold 17 and the convex portion mold 18 may be made of resin (e.g., plastic), metal, etc. instead of wood. After the uneven surface formation process (S10) is completed, the first bent surface formation process (S01) is performed, and after the first bent surface formation process is completed, the second bent surface formation process (S02) is performed, thereby manufacturing the coating structure 1 according to the second embodiment.

[0101] The coating structure 1 according to the seventh embodiment can be made stronger by providing multiple uneven surfaces 15 of the coating structure 1 that are designed based on formulas (1), (2), and parameters. Furthermore, by setting the outer diameter of the uneven surfaces 15 and the thickness of the metal plate 11 as described above, the metal plate 11 becomes less prone to fracture, further improving its strength. In addition, by providing multiple uneven surfaces 15, the axial stiffness in the cross-section of the metal plate 11 can be made smaller compared to the case without the uneven surfaces 15. As the axial stiffness decreases, the surface of the metal plate 11 becomes more prone to contraction, and the metal plate 11 becomes a structure that is more susceptible to jump buckling (phenomenon). On the other hand, since the bending stiffness of the metal plate 11 can be made larger compared to the case without the uneven surfaces 15, it becomes less prone to so-called Euler buckling. As a result, the metal plate 11 becomes a structure that is more susceptible to jump buckling (phenomenon). From the above, the coating structure 1 can be easily unfolded.

[0102] Although embodiments of the present invention have been described above, the covering structure, frame structure, etc. according to the present invention can be appropriately combined without departing from the technical idea. [Explanation of symbols]

[0103] 1, 1a, 1b, 1c... Covering structure 3, 3a... Frame structure 4-axis frame 5. Connection plate 6. First rotating frame 7. Second rotating frame 8. Brace 9. Branch plate

Claims

1. A roughly U-shaped covering structure formed by bending a flat metal plate, which creates a space inside, A covering structure comprising a first bent portion provided on a metal plate and bent with a predetermined radius of curvature, and a second bent portion formed by further bending the first bent portion and bent in a different direction from the first bent portion with a larger radius of curvature than the first bent portion.

2. A covering structure formed by bending a flat metal plate, which creates a space inside, A metal plate is provided with a first bent portion that is bent with a predetermined radius of curvature, and a second bent portion that is formed by further bending the first bent portion and is bent in a different direction from the first bent portion with a larger radius of curvature than the first bent portion. The radius of curvature of the first bend is five times or more the thickness of the flat plate member. A covering structure in which the radius of curvature of the second bend is 10 times or more the radius of curvature of the first bend.

3. A covering structure formed by bending a flat metal plate, which creates a space inside, A metal plate is provided with a first bent portion that is bent with a predetermined radius of curvature, and a second bent portion that is formed by further bending the first bent portion and is bent in a different direction from the first bent portion with a larger radius of curvature than the first bent portion. It further comprises multiple protrusions and indentations arranged at predetermined intervals, A covering structure configured to transition from a folded state to an unfolded state.

4. The metal plate is made of aluminum alloy or steel. The elongation performance of the metal sheet is 10% or more. The covering structure according to any one of claims 1 to 3.

5. The covering structure according to claim 3, wherein the uneven portion has an outer diameter 150 to 200 times the thickness of the metal plate and a depth 10 to 20 times the thickness of the metal plate.

6. A method for manufacturing a roughly U-shaped covering structure that is formed by bending a plate-shaped metal sheet and creating a space inside, A first bending portion forming step in which a first bending portion is formed on a metal plate with a predetermined radius of curvature, After forming the first bent portion, a second bent portion formation step is performed, in which the first bent portion is further bent in a different direction from the first bent portion with a larger radius of curvature than the first bent portion to form a second bent portion. A method for manufacturing a coated structure containing a coating.

7. The process further includes a step of forming multiple uneven parts arranged at predetermined intervals, In the process of forming the uneven portion, the corresponding mold for the convex portion and the mold for the concave portion are aligned so as to form a predetermined offset interval in the planar direction of the metal plate, and the metal plate is sandwiched between them to form the uneven portion, as described in claim 6.

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