JP2533806B2 - Tubular structure material that can be folded and stored - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a foldable hollow tubular structural member. The present invention is particularly effective when applied to a space structure member, but is not limited to such an application.

[Conventional technology]

The foldable tubular structure material is promising as a support structure for a large space structure because it is lightweight and has a good storability by folding. A thin film is used for this tubular structure, and a plurality of tubular structures are appropriately combined to form a support structure. The support structure is stored in a folded state, launched into outer space, and then deployed by filling it with gas pressure. As the thin film material, a material having a property of being hardened by some means such as sunlight can be used in order to impart the shape retaining ability in the expanded state. When a curable material is not used, internal pressure is constantly applied within the support structure to maintain its shape.

[Problems to be Solved by the Invention]

The tubular structural material is composed of a thin film, and the supporting structure composed of this tubular structural material is bent during use,
It is known that, due to a load such as twisting and compression, a tubular buckling phenomenon in which the cross section is locally flattened in a tubular structure material having a thin film structure occurs.

The present invention, in a support structure composed of a tubular structural material formed of a thin film, has a high buckling strength and can sufficiently reduce the capacity at the time of folding, and it is possible to expand when expanding by filling fluid pressure inside. It is an object of the present invention to provide a tubular structural material for a structure which does not impair ease.

Another object of the present invention is to provide a method for manufacturing and folding such a tubular structure.

Still another object of the present invention is to provide a structure using the tubular structural material as described above.

[Means for solving the problem]

In order to achieve the above object, in the present invention, the tube body of the tubular structural material is formed of a foldable flexible material. A reinforcing member such as a stringer or a partition or a combination thereof is provided inside the pipe body formed of this flexible material. These stiffeners are made of the same flexible material as the tube body to allow folding.

When the reinforcing material has a partition wall structure, the tube body and the partition wall can be folded in different ways depending on the sectional shape of the tube body. When the tube body has a quadrangular cross section, the partition walls are arranged at right angles to the longitudinal axis of the tube body and at intervals in the length direction, and the periphery of the partition wall is bonded to the tube body by adhesion or the like. This structural material can be folded such that the tube body is crushed in the length direction between the partition walls. In this case, two opposing side walls of the pipe body are divided into two equal parts in the length direction along the line perpendicular to the longitudinal axis of the pipe body. And fold inward in the radial direction, and the other two side walls are folded inward in the radial direction into a triangular shape with the center of the partition between the partition walls as the apex, so that the other side walls are crushed in the longitudinal direction. it can. Of the partition between the partition walls of the tube body,
It is possible to make the thickness of the tubular structural member in the folded state substantially uniform by making the side walls fold in the adjacent two sections 90 ° apart. Further, the structural member having the partition wall arrangement can be folded so as to crush the pipe body in the radial direction. In this case, two opposite sides of the partition wall are folded inward and folded in a triangular shape, and the tube body is folded so that two side walls corresponding to the two sides of the partition wall are folded inward.

The partition walls can also be arranged so as to intersect the longitudinal axis of the pipe body at an angle. In this arrangement, the peripheries of the bulkheads are joined by gluing or the like, and the folding of the tubular structure is
This is done by crushing the tube body in the radial direction. At this time, two opposite sides of the partition wall are folded inward and folded in a triangular shape. The tube body is folded so that the two side walls corresponding to the two sides of the partition wall are folded inward.

The support structure can be configured by combining the tubular structure material that is flatly folded in the radial direction in this manner with the tubular structure material that is folded by being crushed in the length direction. In this support structure, the tubular structural material folded flat in the radial direction can be wound around the tubular structural material folded so as to be crushed in the longitudinal direction, and can be put into a folded storage state.

The tube body can also be formed with a circular or elliptical cross section. In this case, they are arranged at right angles or at an angle to the longitudinal axis of the tube body. The periphery of the partition is connected to the tube body at four points. The tube body is folded along the length direction at the side wall portion not connected to the partition wall and is crushed in the radial direction. Similarly, the partition wall is also crushed in the radial direction and folded. At this time, the peripheral portion of the partition wall that is not coupled to the pipe body is displaced from the pipe body. This tubular structure material is manufactured by previously folding the partition wall into a desired shape and joining the tube body to the partition wall by bonding or the like at a required location.

[Work]

In the present invention, since a tubular member formed of a thin film is provided with a reinforcing member such as a stringer or a partition wall, when a load such as bending, twisting, or compression is applied to the structure member, The buckling resistance of the tubular structural material can be increased.
Particularly, when the reinforcing member is configured as a partition wall, the partition wall functions to maintain the cross-sectional shape of the tubular structural material,
It is possible to increase the strength against bending buckling due to the locally flattened cross section under the bending moment. Further, the tubular structure having the partition wall can be folded without any trouble by adopting a method suitable for its shape and arrangement, and the storability is not impaired. Similarly, there is no hindrance in the deployment.

〔Example〕

FIG. 1 shows a first embodiment of the present invention. This embodiment is an example in which the present invention is applied to a tubular structural material having a square cross section. In FIG. 1, the tubular structure material 1 of the present invention
Comprises a tube body 2 and partition walls 3 arranged in the tube body 2 at equal intervals. The tube body 2 is divided into sections 2a having a predetermined length, and each section 2a has a square side surface 2b. Joint flanges 2c are formed on both ends of each section 2a in the lengthwise direction, and partition walls 3 are bonded to the flanges 2c. Further, the sections 2a are connected to each other at the connecting flange 2c. As shown in FIG. 1, the partition wall 3 is formed with a vent hole 4 for allowing gas pressure to flow through each of the compartments 2a. This vent 4
The partition wall 3 is not limited to the size shown in the drawing, and may be formed larger to form the partition wall 3 in a ring shape.

FIG. 2 shows a state in which the tubular structural material 1 of FIG. 1 is folded. As shown in FIG. 2, the tubular structural material 1 of this embodiment is folded so as to be crushed in the length direction. First
FIG. 3 and FIG. 3 show a folding method of the tubular structural material 1. In the uppermost section 2a, the side walls 2b of the main body 2 which are diametrically opposed to each other are aligned with the longitudinal axis of the tubular structural material 1. It is folded inward in the radial direction along a fold line 2d that is perpendicular to the fold line and passes through the center in the vertical direction. The other two sides of body 2
The fold line 2b is folded along a fold line 2e that is continuous with the fold line 2d so that the fold line 2e extends outward, and the side face 2b
It is folded inward along a triangular fold line 2g with the center 2f of the as the apex. In the second section 2a from the top, the same folding method is performed with a 90 ° phase shift. By thus bending the two adjacent sections 2a with the phase shifted by 90 °, the thickness of the tubular structure 1 in the folded state can be minimized. As shown in FIG. 1, in the tubular structure material 1, a hose 5 for introducing pressurized gas is connected to one of the compartments 2a.

FIG. 4 shows another embodiment of the present invention. In this embodiment, the structure itself of the tubular structure material 11 is similar to that of the previous embodiment, and the tubular structure material 11 is composed of a tube body 12 and a partition wall 13. Partition
The tube 13 is arranged at right angles to the longitudinal axis of the tube body 12. Further, in this embodiment, the partition wall 13 is connected to the tube body 12 only at the upper and lower two sides in FIG. 4, and the two sides at both sides are not connected to the tube body 12.

As shown in FIG. 5, the tubular structural member 11 in this embodiment is formed by folding both side walls of the pipe body 12 inward.
It is folded in a crushed state in the vertical direction. At this time,
As shown in FIG. 6, the partition wall 13 is folded in a triangular shape having the center 13a as an apex. The side 13b of the partition wall 13 which is not connected to the tube body 12 is folded inward. The tubular structure material 11 thus folded is folded or folded as shown in FIG. 7 or rolled up as shown in FIG. 8 to be stored.

FIG. 9 shows still another embodiment of the present invention. In this embodiment, the tubular structural material 21 comprises a tube body 22 having a rectangular cross section and a partition wall obliquely arranged inside the tube body 22.
It consists of 23 and. The upper and lower sides of the partition wall in FIG. 9 are connected to the pipe body 22, and the other two sides are not connected to the pipe body 22. As shown in FIG. 10, the tubular structural member 21 in this embodiment is also folded up and down by folding the side walls on both sides of the pipe body 22 inward. 11th
FIG. 12 and FIG. 12 show an example of how to fold the partition wall in this embodiment. The partition wall 23 is a horizontal line 23a passing through the center in the vertical direction.
Points laterally displaced from the geometric center of the bulkhead 23 along the
It is folded into a triangle with 23b as the apex. Then line 23a
Is folded inward, and a portion 23c shown by a dotted line in FIG. 12 is folded outward. This folding method and this back folding are alternately performed by the adjacent partition walls 23. This folding method of the partition wall is used when the tube body 22 has a square cross section and the arrangement angle of the partition wall 23 is 45 ° with respect to the longitudinal axis of the tube body 22. FIG. 13 shows that the cross section of the pipe body 22 is not square, or the partition is arranged
Indicates the folding method applied when it is not 45 °. In this folding method, the right side and the left side are folded in a triangle,
The vertices of each triangle are laterally offset from each other.

FIG. 14 shows another embodiment of the present invention. In this embodiment, the tubular structural member 31 includes a tube body 32 having a circular cross section and the tube body 32.
It is composed of a plurality of partition walls 33 diagonally arranged inside 32. The partition wall 33 includes upper and lower sides and two sides 33a and left and right sides 33b.
Is connected to the pipe body 32 and has a non-coupling portion 33c between the coupling portions. As shown in FIG. 16, the tubular structural member 31 of this embodiment has a flare 32a formed by folding in the longitudinal direction of the pipe main body 32.
And is folded in a state of being crushed in the radial direction.
At this time, the partition wall is folded along the line shown in FIG.
In FIG. 15, the solid line is the part that is folded toward you,
The dotted line is the part that is folded over.

FIG. 17 shows an embodiment of the present invention having a stringer type reinforcing member. The tubular structural member 41 of the present embodiment has a cylindrical tube body 42, and a longitudinal member 43 extending in the length direction is bonded to the inner surface of the cylindrical tube body 42 by adhesion. Longitudinal material
43 is a hollow structure with a semicircular cross section. Further, a partition wall 44 is arranged in the middle of the pipe body 42. Folding of the tubular structure material 41 is performed by crushing it in the diametrical direction. At this time, the partition wall 44 may be folded by a method similar to the method shown in FIG.

FIG. 18 shows a part of the support structure assembled using the tubular structure material according to the embodiment of the present invention. The tubular structural material 11 shown in FIG. 4 is arranged laterally with respect to the tubular structural material 1 shown in FIG. 1, and one end of the tubular structural material 11 is joined to the lateral surface of the tubular structural material 1. Further, one end of another tubular structure 11 shown in FIG. 4 is joined to the lateral surface of the other end of the tubular structure 11. The folding is performed by crushing the tubular structural material 1 in the lengthwise direction to fold it, winding the first tubular structural material 11 on this, and then winding the second tubular structural material 11 on it. The deployment may be performed by injecting gas pressure in the reverse order of winding. It goes without saying that combinations of tubular structural materials other than those shown in FIG. 17 are possible.

[Effect]

In the present invention, since the reinforcing material is provided inside the tubular structural material, the buckling resistance of the structural material is improved. As a result, the weight of the support structure made of this structural material is reduced as a whole. When the reinforcing material is configured as a partition wall, the strength against the buckling buckling due to the flat deformation of the cross-section of the tubular structure material is increased, so the wall thickness of the pipe body can be reduced, and as a result, the weight of the structure is reduced. it can. Further, in the folded state, the tubular structural material does not become bulky due to the presence of the reinforcing material, and the deployment is not hindered. Therefore, it is possible to obtain a lightweight and durable tubular structure that can be folded compactly for storage and does not hinder the development.

[Brief description of drawings]

FIG. 1 is a perspective view of a part of a tubular structure material showing an embodiment of the present invention, FIG. 2 is a perspective view showing the tubular structure material of FIG. 1 in a folded state, and FIG. 3 is a perspective view showing a folding method. FIG. 4 is a perspective view of a tubular structure material showing another embodiment of the present invention, and FIG.
The figure is a perspective view showing a folding method of the tubular structural material of FIG.
FIG. 6 is a perspective view showing a method of folding the partition wall of the tubular structural material of FIG. 4, FIGS. 7 and 8 are side views showing a stored state of the tubular structural material of FIG. 4, and FIG. 9 is the present invention. Fig. 10 is a perspective view showing still another embodiment of Fig. 10, Fig. 10 is a perspective view showing a folded state of the tubular structural material of Fig. 9, and Fig. 11 is a perspective view showing a method of folding the partition wall of the tubular structural material of Fig. 9. , FIG. 12 and FIG. 13 are front views showing folding lines of partition walls, FIG. 14 is a perspective view of a tubular structural material showing still another embodiment of the present invention, and FIG.
14 is a front view showing the folding line of the partition wall in the embodiment of FIG.
16 is a perspective view showing a folded state of the tubular structural material of FIG. 14, FIG. 17 is a perspective view showing still another embodiment of the present invention,
FIG. 18 is a perspective view of a part of a support structure using the tubular structure material of the embodiment of the present invention. 1 ... Tubular structure material, 2 ... Pipe body, 3 ... Partition wall, 4 ... Vent hole, 5 ... Gas filling hose.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masamori Sakamaki 1-15-12 Shiratori, Aso-ku, Kawasaki City, Kanagawa Prefecture (72) Inventor Yuzo Shibayama 5-33-1, Shiba, Minato-ku, Tokyo NEC Corporation (72) Inventor Masao Suzuki 6 at 3075 Nagara, Gifu City, Gifu Prefecture 6 (72) Inventor Junro Kato, 1 Kawasaki Town, Kakamigahara City, Gifu Prefecture Kawasaki Heavy Industries, Ltd. Gifu Factory (56) Reference Japanese Patent Laid-Open No. 2- 141396 (JP, A) Actual development Sho 60-187259 (JP, U)

Claims (5)

(57) [Claims] 1. A hollow tubular tube body formed in a rectangular cross section by a foldable flexible membrane material, and the tube inside the tube body so as to intersect with a longitudinal axis of the tube body. The plurality of partition walls are arranged at intervals in the length direction of the main body, and at least a part of the peripheral portion is connected to the pipe main body, and the partition walls are folded by folding two opposite sides inward in the radial direction. The pipe body is folded in a state in which two side surfaces corresponding to the two sides of the partition wall are folded inward in the radial direction and crushed in the radial direction, and a radius is obtained by introducing a fluid pressure into the inside of the pipe body. A tubular structural material characterized in that it can be expanded by expanding in the direction. 2. A hollow tubular tube body formed in a circular or elliptical cross section by a foldable flexible membrane material, and inside the tube body so as to intersect with a longitudinal axis of the tube body. A plurality of partition walls arranged at intervals in the length direction of the pipe body, the partition walls facing each other in the diametric direction of the peripheral portion and in the diametric direction perpendicular to the two sides. And the two sides that are coupled to the pipe body, and are not coupled to the pipe body between the respective sides coupled to the pipe body, and the sides that are not coupled to the pipe body with respect to the pipe body. It is folded so as to be displaced in the axial direction and folded to be crushed in the radial direction, the pipe body is folded in a crushed state in the folding direction of the partition wall, and the radius is obtained by introducing fluid pressure into the inside of the pipe body. Bulge in the direction The tubular structural member was characterized by now be deployed. 3. A hollow tubular tube body formed in a quadrangular cross section by a foldable flexible membrane material, and the tube inside the tube body so as to be orthogonal to a longitudinal axis of the tube body. A tubular structural member is provided which is arranged at intervals in the lengthwise direction of the main body and has a plurality of partition walls, at least a part of the peripheral portion of which is connected to the pipe main body. The side wall is folded inward in the radial direction along a line perpendicular to the longitudinal axis of the pipe body at an intermediate portion that bisects between the two adjacent partition walls. The other two side walls are folded inward in the radial direction into a triangular shape having the center of the portion between the two adjacent partition walls as vertices, so that the pipe body is lengthwise between the two partition walls. Fold it down to squeeze it into the Folding method of the tubular structure material by performing between each of the partition walls of, characterized in that folding the tubular structural member in the longitudinal direction. 4. The method according to claim 3, wherein when the partition of the pipe body between two adjacent partition walls is folded so as to be crushed in the lengthwise direction, the side wall of the pipe body is folded in the adjacent direction. This method is characterized by making 90 ° crosses between sections. 5. A hollow tubular tube body formed in a rectangular cross section by a foldable flexible membrane material, and the tube inside the tube body so as to be orthogonal to a longitudinal axis of the tube body. A plurality of partition walls arranged at intervals in the length direction of the main body and having at least a part of the peripheral portion joined to the pipe main body, and the pipe main body is crushed in the length direction in a portion between the partition walls. And a second tubular structural material having a structure according to claim 1 or 2, wherein the first tubular structural material is folded and folded so that it can be expanded in a longitudinal direction by introducing a fluid pressure into the tube main body. Are combined so that the ends of the second structural material are coupled to the first structural material, and the first tubular structural material is folded so as to be crushed in the longitudinal direction, and the second tubular structural material is pressed in the radial direction. Fold to collapse,
A structure capable of being expanded by fluid pressure, characterized in that the folded second tubular structure material is wound around the first tubular structure material to be housed.