JP2009001183A - Developable structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylindrical developable structure making expansion and contraction/development possible on a large scale. <P>SOLUTION: A belt state unit is provided to be bendable along an arc with one sub-axis A<SB>S1</SB>among a plurality of sub-axes A<SB>S1</SB>to A<SB>S4</SB>surrounding the main axis A<SB>M</SB>by combining mountain folds M and valley folds V. The belt state unit is provided to be bendable along the arc with the other sub-axis A<SB>S2</SB>which is adjacent to one sub-axis A<SB>S1</SB>by repeating valley folds V and then combining the mountain folds M and the valley folds V. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a deployment structure, for example, a deployment structure for obtaining a closed space in outer space, the moon surface, or the earth.

  In the past, for example, in a space space, on the moon surface, or on the earth, a cylindrical development structure surrounded by a cylindrical side wall has been considered in order to obtain a closed space. In such a cylindrical deployment structure, for example, it is required that the size can be expanded / stored from the surface of conveyance or the like, and there are several expansion methods that enable the cylindrical deployment structure itself to be expanded / stored. Proposed.

  As an example of this unfolding method, for example, a tubular unfolding structure shown in Patent Document 1 is known. The said cylindrical expansion | deployment structure has the some strip | belt-shaped unit U whose expansion | deployment shape is strip | belt shape. Each of the plurality of strip-like units U can be folded along a crease line indicated by a dotted line and a solid line in FIG. In FIG. 7C, a dotted line indicates a mountain fold, and a solid line indicates a valley fold.

  As shown in the figure, the band-shaped unit U is provided so as to be able to bend while alternately repeating mountain folds and valley folds according to the crease line L along the band length direction Y2, and both ends of the band length direction Y2 are joined. It is provided as follows. Then, a plurality of end portions in the band width direction Y1 of the band-shaped unit U are joined so as to be bendable and provided in a cylindrical shape, and the cylinder length direction (z-axis direction) and the cylinder radial direction (x-axis, y-axis direction) Can be expanded / accommodated three-dimensionally at the same time.

However, the above-described conventional cylindrical deployment structure has a small deployment efficiency in the cylinder radial direction (x-axis and y-axis directions), and there is still room for improvement in the method of expansion and contraction deployment.
Japanese Patent Application No. 10-285639

  Therefore, the present invention pays attention to the above-described problems, and an object thereof is to provide a deployment structure that can be expanded and contracted at a large rate.

  The invention according to claim 1, which has been made to solve the above-described problem, is provided with a plurality of band-shaped units having a band-shaped developed shape, and the band-shaped unit performs mountain fold and valley fold according to a fold line along the band length direction. It is provided so as to be foldable so as to surround the main central axis in combination, and is provided so that both ends in the band length direction are joined, and a plurality of end portions in the band width direction of the band unit are foldably joined. In the unfolded structure in which the tube length direction and the tube radial direction can be simultaneously unfolded / accommodated in a three-dimensional manner, the belt-shaped unit performs the mountain fold and / or the valley fold. A plurality of sub-center axes that surround the main center axis in combination and are provided so as to be foldable along an arc centered on one of the sub-center axes; / Or A combination of folding lies in deployable structure, characterized in that is provided so as to be folded along the arc around the other sub-central axis adjacent to the sub-central axis of the one.

  According to invention of Claim 1, a strip | belt-shaped unit is along the arc centering on one sub center axis | shaft of the several sub center axes which combine a mountain fold and / or a valley fold and surround a main center axis | shaft. It is provided so that it can be folded, and after being repeatedly folded or folded, it is provided so that it can be folded along an arc centered on another sub-center axis adjacent to one sub-center axis by combining mountain folds and / or valley folds. Therefore, it is possible to increase the expansion / contraction efficiency in the cylinder radial direction, rather than alternately repeating the mountain fold and the valley fold.

  According to a second aspect of the present invention, in the unfolded structure according to the first aspect, the band-shaped unit is provided so as to be foldable so as to be line-symmetric with respect to a line passing through the main central axis. Exist.

  According to the invention described in claim 2, since the belt-like unit is provided so as to be foldable so as to be line-symmetric with respect to the line passing through the main central axis, the expansion / contraction efficiency in the cylinder radial direction is increased. Can do.

  According to a third aspect of the present invention, there are provided a plurality of band-shaped units each having a band-shaped developed shape, and the band-shaped unit surrounds the main central axis by combining mountain folds and valley folds along a crease line along the band length direction. It is provided so that it can be bent and both ends of the belt length direction are joined, and a plurality of end portions in the belt width direction of the belt-like unit are joined so as to be foldable and provided in a cylindrical shape. In the unfolded structure in which the length direction and the cylinder diameter direction can be unfolded / accommodated three-dimensionally at the same time, the band-shaped unit is provided so that at least a part thereof is continuous with the mountain fold or the valley fold. It exists in the deployment structure characterized by being.

  According to the invention described in claim 3, since the belt-like unit is provided so that at least a part thereof is continuous in the mountain fold or the valley fold, the strip unit is formed into an arc centered on the plurality of sub central axes surrounding the main central axis. It can be bent into a complex accommodation plane shape such as a shape along the shape, and the expansion / contraction efficiency in the cylinder radial direction can be increased.

  As described above, according to the first to third aspects of the present invention, since the expansion / contraction efficiency in the cylinder radial direction can be increased, a cylindrical expansion structure that can expand / contract at a large rate is obtained. be able to.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1A is a perspective view showing a state when the unfolded structure of the present invention is unfolded, and FIG. 1B is a perspective view showing a state when the unfolded structure shown in FIG. FIG. FIG. 2 is a top view of the unfolded structure shown in FIG. 1 when accommodated. FIG. 3 is a development view of the development structure shown in FIG. 1.

  The unfolded structure 1 of this embodiment has a plurality of strip-shaped units U (see FIG. 3) whose striped shape is a strip shape. In this embodiment, all the strip units U have the same shape and the same folding method. Each of the plurality of strip-like units U can be bent along the crease line indicated by the dotted line and the solid line in FIG. 3. In FIG. 3, dotted lines indicate mountain folds, and solid lines indicate valley folds.

As shown in the figure, the band-shaped unit U can be folded so as to surround the main central axis A _M (FIG. 2) by combining mountain folds and valley folds according to the crease lines L1 and L2 along the band length direction Y2. Is provided. The crease lines L1 and L2 are provided over the entire band length direction Y2 of the band-shaped unit U. The crease lines L1 and L2 are provided in the center of the band-shaped unit U in the band width direction Y1.

  Further, the band-like unit U is provided with crease lines L3 and L4 from the boundary between the crease line L1 and the crease line L2 toward both ends in the band width direction Y1 of the band-like unit U. The band-shaped unit U is bent along the band length direction Y2 while combining mountain folds and valley folds according to the crease lines L3 and L4.

Here, in order to explain the folding form of the band-shaped unit U, a partial development view of the band-shaped unit U is shown in FIG. FIG. 4A shows a partially developed view of the belt-like unit U, and FIGS. 2B and 2C show a process of bending the band unit U sequentially. 3 and the result of folding the strip-shaped unit U as shown in FIG. 4, as shown in FIG. 2, the strip unit U, a convex fold M · concave fold V repeatedly alternately main central axis A _M of the enclosing multiple The sub-center axis A _S1, which is one of the sub-center axes A _S1 to A _S4 , is bent in a zigzag manner along the arc. Next, strip-shaped unit U, with a focus on other sub-central axis A _S2 adjacent repeated alternately again convex fold M · concave fold V after repeated twice valley folding V and the sub-central axis A _S1 arc It is bent along the zigzag.

Next, strip-shaped unit U, with a focus on other sub-central axis A _S3 that the convex fold M · concave fold V repeatedly alternately adjacent to secondary central axis A _S2 after repeated twice again concave fold V arc It is bent along the zigzag. After that, the belt-like unit U repeats the valley fold V twice and then alternately repeats the mountain fold M and the valley fold V to follow the arc centered on the other sub central axis A _S4 adjacent to the sub central axis A _S3. And bend in a zigzag manner. Furthermore, both ends of the band length direction Y2 of the band unit U are joined to provide the band unit U in an annular shape.

Thus, accommodating the planar shape of the band-like unit U, the four nuclear N1~N4 to be convex toward the outside around the main central axis A _M is provided shape. The nuclear N1~N4 is arranged to be line symmetrical with respect to a line L5 through the main central axis _{A M.} That is, all the nuclei N1 to N4 are folded in the same folding manner, and the belt-like unit U is provided so as to be bent with respect to the line L5.

  The plurality of strip units U are joined to each other so that the ends in the strip width direction Y1 can be bent. Thereby, as shown in FIG. 1, the development structure 1 is provided in a cylindrical shape, and the cylinder length direction Y3 and the cylinder radial direction can be expanded / accommodated three-dimensionally at the same time.

  Next, the joining of the strip units U will be described in more detail. As described above, the plurality of strip units U are joined to each other so that the ends in the strip width direction Y1 can be bent. The ends of the band-shaped unit U are also joined so that the mountain fold M and the valley fold V are alternately repeated along the band length direction Y2. That is, the part facing the crease line L1 (mountain fold) of the end portions in the band width direction Y1 of the strip unit U sandwiched between the crease lines L3 and L4 is joined so as to be foldable into a valley fold. On the other hand, the part facing the crease line L2 (valley fold) is joined so as to be foldable into a mountain fold. Thereby, the strip | belt-shaped units U are joined so that the expansion | deployment structure 1 may become bellows shape along the cylinder length direction Y3.

According to deployable structure 1 described above, the strip unit U, one of the plurality of sub-central axis A _S1 to A _S4 that the convex fold M · concave fold V repeatedly alternately surrounding the main central axis A _M sub It is provided so as to be bendable along an arc centered on the central axis A _S1 , and after the valley fold V is continued, the mountain fold M and the valley fold V are alternately repeated, and another sub-axis adjacent to the one sub-center axis A _S1. Since it is provided so as to be bendable along an arc centered on the central axis A _S2 , the expansion / contraction efficiency in the cylinder radial direction is increased as compared with the conventional case where the mountain fold M and the valley fold V are alternately and repeatedly folded. The expansion / contraction / deployment efficiency in the cylinder radial direction can be increased.

Further, according to the deployable structure 1 described above, the strip unit U, since the foldably arranged so as to be axisymmetric with respect to the line L5 passing through the main central axis A _M, the tubular radial expansion / The deployment efficiency can be increased, and the expansion / contraction / deployment efficiency in the cylinder radial direction can be increased.

Further, according to the deployable structure 1 described above, the strip unit U, since the provided so as to be continuous at least partially folded mountain M or concave fold V, a plurality of sub-centers surrounding the main central axis A _M It can be bent into a complex accommodation flat shape such as a shape along an arc centered on the axes A _{S1 to} A _S2 , and the expansion / contraction efficiency in the cylinder radial direction can be increased.

Note that according to the above-described embodiment, strip-shaped unit U, has been arranged to be folded along the combination of both convex fold M and valley fold V around the secondary central axis A _S1 to A _S4 arc However, the present invention is not limited to this. For example, as shown in FIG. 5, it is also conceivable to provide foldably along the mountain fold arc around the secondary central axis A _S2 in combination only M.

  Moreover, according to embodiment mentioned above, although the several nucleus N1-N4 provided in the strip | belt-shaped unit U was all provided in the same shape (same folding method), this invention is not limited to this. For example, as shown in FIG. 5, it is also conceivable to provide the core N2 in a different folding manner.

Further, according to the above-described embodiment, the band unit U is provided with the four nuclei N1 to N4 surrounding the four sub-center axes A _{S1 to} A _S4 , but the present invention is not limited to this. . The number of nuclei may be plural, for example, as shown in FIG. 6, it may be 6, or may be 8 although not shown.

  In the embodiment shown in FIGS. 2 and 6, the number of nuclei is an even number. However, the present invention is not limited to this. The number of nuclei may be an odd number. For example, if the nuclei N2 shown in FIG. 6 are removed so that the number of nuclei is odd, three is obtained.

Further, according to the above-described embodiment, the band unit U is provided with the four nuclei N1 to N4 surrounding the four sub-center axes A _{S1 to} A _S4 , but the present invention is not limited to this. . As long as at least a part of the belt-like unit U is provided so as to continue the mountain fold M or the valley fold V, it is not necessary to provide a nucleus.

Further, according to the above-described embodiment, strip-shaped unit U of the housing during, which had provided so as to be axisymmetric with respect to the line L5 passing through the main central axis A _M, lines the shape of the strip-like unit U Any shape is possible, not limited to symmetry.

  Further, according to the above-described embodiment, the dotted line in FIG. 3 is called a mountain fold and the solid line is called a valley fold. However, for example, the dotted line may be called a mountain fold and the solid line may be called a valley fold.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

(A) is a perspective view which shows the state at the time of expansion | deployment of the expansion | deployment structure of this invention, (B) is a perspective view which shows the state at the time of accommodation of the expansion | deployment structure shown to (A). It is a top view at the time of accommodation of the expansion | deployment structure shown in FIG. It is an expanded view of the expansion | deployment structure shown in FIG. It is a fragmentary perspective view of the strip | belt-shaped unit which comprises the expansion | deployment structure shown in FIG. 1, (A) shows an expansion | deployment state, (B) shows the middle of expansion | deployment, (C) shows an accommodation state. It is a top view of the expansion | deployment structure in other embodiment. It is a top view of the expansion | deployment structure in other embodiment. (A) is a perspective view which shows the state at the time of expansion | deployment of the conventional expansion | deployment structure, (B) is a perspective view which shows the state at the time of accommodation of the conventional expansion | deployment structure, (C) is the conventional expansion | deployment structure. FIG.

Explanation of symbols

A _M Main central axis A _{S1 to} A _S4 Sub central axis U Band-shaped unit Y1 Band width direction Y2 Band length direction

Claims (3)

A plurality of band-shaped units having a band-shaped developed shape are provided, and the band-shaped unit is provided so as to be foldable so as to surround the main central axis by combining mountain folds and valley folds along a fold line along the band length direction. It is provided so that both ends in the lengthwise direction are joined, and a plurality of end portions in the widthwise direction of the belt-like unit are joined so as to be foldable and provided in a cylindrical shape. In a deployment structure that can be deployed / accommodated three-dimensionally at the same time,
The band-shaped unit is provided so as to be bendable along an arc centered on one sub-center axis among a plurality of sub-center axes surrounding the main center axis by combining the mountain fold and / or the valley fold, After the mountain fold or the valley fold is continued, the mountain fold and / or the valley fold are combined to be foldable along an arc centered on the other sub central axis adjacent to the one sub central axis. An unfolded structure characterized by   The unfolded structure according to claim 1, wherein the belt-like unit is provided so as to be foldable so as to be line-symmetric with respect to a line passing through the main central axis. A plurality of band-shaped units having a band-shaped development shape are provided, and the band-shaped unit is provided so as to be foldable so as to surround the main central axis by combining mountain folds and valley folds according to a fold line along the band length direction. It is provided so that both ends in the lengthwise direction are joined, and a plurality of end portions in the widthwise direction of the belt-like unit are joined so as to be foldable and provided in a cylindrical shape. In a deployment structure that can be deployed / accommodated three-dimensionally at the same time,
The unfolded structure, wherein the belt-like unit is provided so that at least a part thereof is continuous with the mountain fold or the valley fold.

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