JP2980243B2 - Cylindrical deployment structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to, for example,
The present invention relates to a tubular deployment structure for obtaining a closed space on the moon or on the earth.

[0002]

2. Description of the Related Art A cylindrical structure surrounded by a cylindrical side wall has been considered for obtaining a closed space, for example, in outer space, on the moon, or on the earth. In such a tubular structure, for example, it is required to be able to expand and contract the size from the surface of, for example, transportation, and some deployment methods for making the tubular structure itself expandable and contractable have been proposed.

In a conventional method of deploying a tubular structure, there has been a method in which a side wall can be expanded and contracted in a vertical direction (a central axis direction of the tubular body) of the tubular structure.

[0004]

Needless to say, the above-mentioned conventional expansion method only expands and contracts in the vertical direction, and does not perform expansion and contraction in the horizontal direction. Therefore, there is still room for improvement in the expansion and contraction method. There is.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a tubular deployable structure having a deployable pattern that enables expansion and contraction at a large rate and provides various additional effects.

[0006]

According to a first aspect of the present invention, there is provided a tubular deployment structure which is surrounded by a side wall and is capable of expanding and contracting the entire shape. A cylindrical shape that is a trajectory obtained by moving an arbitrary closed curve along an arbitrary axis, and a plurality of segments that can bend a plurality of segments in the axial direction and the closed curve direction. The jointed side of the plurality of segments is joined in a state where the joined sides intersect at one point, and the joined pattern of the four or more segments in which the joined sides intersect at one point is bent in the axial direction. A closed pattern that is bent while reducing the internal angle on the closed curve, and an open pattern that is bent while increasing the internal angle on the closed curve in accordance with the bending in the axial direction. and before an open pattern The bending of the segments spliced alternately in closed curve direction, remain the closed curve was closed, and configured to perform stretching expansion in the surface direction including the axis direction and the closed curve.

According to the first aspect of the present invention, the function of the closed pattern bent in the direction of decreasing the internal angle and the pattern of the open pattern bent in the direction of increasing the internal angle are caused by the bending in the axial direction. In the process in which the side wall is folded in the axial direction in combination with the action of the side wall, the side wall is also folded in the plane direction including the closed curve (the direction having the vertical component of the axis, or the radial direction of the cylindrical body). It is being folded. That is, three-dimensional expansion and contraction including the axial direction and the radial direction of the cylindrical body becomes possible, and as a result, the degree of overall expansion and contraction can be increased.

Therefore, for example, when the tubular deployable structure is transported or temporarily stored in some storage space, efficient space utilization can be achieved.

Here, the shape of the tubular deployable structure may be, for example, a substantially circular cylindrical shape having a straight central axis in a plan view (cross-sectional view). The shape is not limited to a cylindrical shape, and includes, for example, an arbitrary closed curve such as a plan view, a triangle or a polygon, and an axis of a cylindrical body is not limited to a straight line, and includes an arbitrary curve. In addition, in the joining pattern of the segments constituting the side wall , the closed pattern and the open pattern intersect in the closed curve direction.
It is a combination that replaces each other, but in the axial direction,
In the case of the closed pattern, the closed pattern needs to continue, and in the case of the open pattern, the open pattern needs to continue, whereby the entire side wall can be smoothly folded.

According to a second aspect of the present invention, in the tubular expanded structure according to the first aspect, a predetermined number of segments connected to the side wall are defined as one module, and the same module as the module is mounted in the axial direction and in the axial direction. The module is repeatedly joined in the closed curve direction, and the module includes four segments joined by the closed pattern, and two segments continuous in the closed curve direction have a length substantially equal to the closed curve direction. When the bending degree in the axial direction is maximum, both ends of the module in the closed curve direction are bent at substantially contact angles when viewed from the axial direction.

According to the second aspect of the invention, the overall reduction efficiency of the side wall can be particularly increased. That is,
When the side wall is folded and reduced, the projection due to the bending of the module is arranged radially by the number of the modules in plan view (see FIG. 2), but the bending in the axial direction is maximized. In some cases, the module is bent to an angle at which both ends thereof are almost in contact with each other. Therefore, in the bent state, the radial length of the tubular deployment structure is reduced.

By making the bending angle of the module acute until both ends of the module overlap, it is possible to minimize the diameter of the tubular deployment structure in the bent state. Overlapping has the opposite effect of lowering the degree of bending in the axial direction. Because both ends of the module are joined to the adjacent module to form a half of the closed pattern, the module already overlaps the adjacent module. Therefore, if the angle is made acute until both ends of the module are overlapped, the overlapped portion is also overlapped with the adjacent module by four overlaps (a state in which eight segments are overlapped).
Become. Since the segments have a certain thickness, the degree of bending in the axial direction is almost twice different between the case where there is a quadruple overlap and the case where there is a double overlap.

However, in the tubular deployment structure according to the second aspect, when viewed from the axial direction, the two ends of the module do not overlap in a position where they are almost in contact with each other. The overall reduction efficiency can be maximized.

According to a third aspect of the present invention, in the tubular expanded structure according to the first aspect, a predetermined number of segments connected to the side wall is defined as one module, and the same module as the module is aligned in the axial direction and in the axial direction. The module is repeatedly joined in the closed curve direction, and the module has a portion in which the first to third segments continuously joined in the closed curve direction are stacked in two stages in the axial direction. When the segment and the second segment are joined in a closed pattern, the second segment and the third segment are joined in an open pattern, and the degree of bending in the axial direction is maximum,
The configuration is such that the degree of bending between the first segment and the second segment is maximized, and the second segment is substantially covered by the first segment.

According to the third aspect of the invention, the reduction efficiency of the side wall in the radial direction can be particularly enhanced.
That is, when the side wall is bent and reduced, the second segment overlaps the first segment, and accordingly, the length of the side wall in the circumferential direction is reduced, and the reduction in the radial direction can be achieved.

Further, according to the above-described structure of the side wall, an effect that a relatively large internal space can be obtained when bending and reducing is obtained. That is, the radial reduction is not performed by pushing the segment into the center,
Since this is performed by folding a part of the segment, an internal space is secured accordingly.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is a perspective view showing a state in which a tubular deployable structure 1 of this embodiment is deployed, and FIG. 2 is a state in which the tubular deployable structure 1 is folded and accommodated. FIG. 3 is a plan development view for explaining a fold of the tubular development structure 1, and FIG. 4 is a top view showing a state where the bending of the tubular development structure 1 is maximized. .

The tubular deployable structure 1 according to this embodiment is, for example, a closed space surrounded by a side wall 1A (need not be completely closed) in outer space, on the moon, or on the earth. However, the upper and lower ends of the cylindrical body may be open), and are formed by joining quadrangular segments s # in a bendable state. As shown in FIGS. 1 and 2, by simultaneously bending the joint between the segments, the zigzag state can be changed from the state (FIG. 1) when the cylindrical shape is developed (FIG. 1).
It can be bent in a state of being reduced in the axial direction and the radial direction on the xy plane (FIG. 2).

As shown in FIG. 3, a side wall 1A is formed by joining six modules having the same shape as the module M1 including four segments s1 to s4 in the circumferential direction on the xy plane. In addition, this unit is configured by joining the units in multiple stages in the z-axis direction. This module M1 is obtained by joining four segments s1 to s4 in a closed pattern Pc.
Along with the bending in the axial direction, the bending is performed in a direction to reduce the inner angle on the xy plane. Also, a joint of the open pattern Po is formed by joining the two modules M1 and M1, and the joint of the open pattern Po causes the joint in the z-axis direction to be bent on the xy plane. It is designed to bend in a direction to increase the inner angle of the vehicle.

Here, the closed pattern Pc and the open pattern Po
FIG. 5 is a development view of segments joined by the open pattern Po in order to explain the bending mode of the above. FIG.
FIGS. 7B and 7C show the state of development of the segments joined by the open pattern Po, and FIGS. 8B and 8C show the process of successive bending.

The open pattern Po is, for example, a joint pattern in which the joint sides h ₁₂ , h ₂₃ , h ₃₄ , h 41 of the four segments s ₁ to s ₄ are joined at a predetermined angle. Then, the two joining sides h ₁₂ and h ₃₄ extending in the xy direction are bent in the z-axis direction in opposite directions to each other, so that the joining sides h ₁₂ and h ₂₃ extending in the z-axis direction form an inner angle. It is bent in the direction to increase. The bending angle depends on the angle at which the joint sides h ₁₂ , h ₂₃ , h ₃₄ , h ₄₁ intersect at the time of unfolding, and the bending angle can be changed by appropriately setting these angles. It is. The open pattern Po is obtained by reversing the bending direction of the closed pattern Pc.

Each segment s in the tubular deployment structure 1
The open pattern Po and the closed pattern Pc are alternately combined in the circumferential direction on the xy plane, and each segment forms a polygon on the xy plane. , In the process of bending in the z-axis direction, the portion of the closed pattern Pc is bent in the direction of decreasing the internal angle, and the portion of the open pattern Po is bent in the direction of increasing the internal angle, and the sum of the internal angles is calculated. It is deformed without changing.

As shown in FIG. 4, in a state where the bending in the z-axis direction is maximum, the module M1 including the segments s1 to s4 is bent so that both ends thereof are almost in contact at the point P1. Is set to And
A portion where the segments s... Overlap (a portion where four segments overlap in the module M1) is a range w1 at the center of the module M1 and a range w at both ends of the module M1.
2, w2, and the other portions are set to have a single overlap.

In this bent state, an internal surplus space B1 is formed inside the tubular deployment structure 1,
An external surplus space B2 is formed in the outer peripheral portion of the tubular deployment structure 1. These surplus spaces are wasteful portions of the accommodation space when the tubular deployable structure 1 is accommodated in a reduced size, but are generated to a considerable extent.

As described above, according to the tubular development structure 1 of the present embodiment, along with the bending in the z-axis direction (predetermined axis direction), it is also folded in the radial direction, and is three-dimensional. Since the expansion and contraction becomes possible, the overall degree of expansion and contraction can be increased. Therefore, for example, when the tubular deployable structure 1 is transported or temporarily stored in some storage space, efficient space utilization can be achieved.

The bending angle of the module M1 is
Since the both ends are set at an angle that makes them almost contact with each other at the point P1, the radial length of the tubular development structure 1 is minimized under the condition that the overlap of the segments s... Can be suppressed. That is, since both ends w2 and w2 of the module M1 are already in a double overlap state because of the overlap with the adjacent module M1, if the bending angle of the module M1 is further set to an acute angle, the module M1 A quadruple overlap occurs at the end, and the quadruple overlap lowers the degree of bending in the z-axis direction. However, with the above configuration, the decrease in the degree of bending in the z-axis direction is avoided, and the overall reduction efficiency in three-dimensional view is higher.

It should be noted that the present invention is not limited to the tubular deployable structure 1 of the present embodiment, but can be appropriately changed without departing from the spirit of the invention. For example, as the shape of the cylindrical deployment structure, a cylindrical shape having a substantially circular shape in plan view (a polygon having substantially the same side length) extending straight in the z-axis direction, but other than a substantially circular shape in plan view Also, the combination of the joining patterns of the segments forming the side wall is not limited to the above combination, and various combinations are possible.

[Second Embodiment] FIG. 6 is a perspective view showing a state in which a tubular deployment structure 100 of this embodiment is deployed, and FIG. 7 is a state in which the tubular deployment structure 100 is folded. FIG. 8 is a plan developed view for explaining a fold of the tubular developed structure 100, and FIG. 9 is a top view of the tubular developed structure 100 in a state where bending is maximized. . Note that the bent state in FIG. 9 is an ideal state in which the action due to the overlap of the segments s is ignored, and in reality, the degree of bending is slightly lower than the state of the figure due to the overlap of the segments s.

The tubular deployment structure 100 according to this embodiment
For example, in a space, on the moon, or on the earth, a closed space whose periphery is surrounded by the side wall 100A (they need not be completely closed, and the upper and lower ends of the cylindrical body may be open. ) Is formed to form a quadrilateral segment s ‥
Are connected to each other in a bendable state. As shown in FIG. 6 and FIG. 7, by simultaneously bending the joint between the segments, the substantially cylindrical shape from the state at the time of development (FIG. 6) is displayed on the z-axis direction and the xy plane. It can be bent in a state reduced in the radial direction (FIG. 7).

As shown in FIG. 8, the side wall 100A has a module M10 comprising eight segments s11 to s42.
Six units having the same shape as 0 are joined in the circumferential direction on the xy plane to constitute a unit, and the units are joined in multiple stages in the z-axis direction. Module M100
Represents first segments s11 and s12, second segments s21 and s22, third segments s31 and s32,
The fourth segments s41 and s42 are continuously joined in the circumferential direction. And the first segments s11, s
12 and the second segments s21 and s22 are joined in a closed pattern, the second segments s21 and s22 and the third segments s31 and s32 are joined in an open pattern, and the third segments s31 and s32 and the fourth segment s41. , S4
2 are joined in a closed pattern. In addition, the fourth segments s41 and s42 and the first segments s11 and s12 of the adjacent module M100 are joined in an open pattern.

As shown in FIG. 9, when the bending in the z-axis direction is maximum, the bending angle of the closed pattern including the first segments s11 and s12 and the second segments s21 and s22 is almost minimum (for example, 0 ° to 10 °), and the second segments s21 and s22 are the first segments.
It almost overlaps with the segments s11 and s12. In addition, the bending angle of the open pattern including the second segments s21 and s22 and the third segments s31 and s32 is set to be approximately the maximum (for example, 350 ° to 360 °),
The third segments s31 and s32 are the second segments s2
1, s22.

In this bent state, an internal surplus space B4 is formed inside the tubular expansion structure 100, and an external surplus space B4 is formed around the outer periphery of the cylindrical expansion structure 100.
5 are formed.

As described above, according to the tubular development structure 100 of the present embodiment, the three directions in the z-axis direction and the xy direction are used.
Since dimensional expansion and contraction is possible, the overall degree of expansion and contraction can be increased. For example, when this tubular deployment structure 1 is transported or temporarily stored in some storage space In such cases, efficient use of space can be measured.

In addition, the tubular deployment structure 1 of this embodiment
According to 00, when reduced in the z-axis direction, the second segments s21 and s22 become the first segments s11 and s12.
It is almost over the upper part, and the third segment s
Since 31 and s32 are substantially overlapped on the second segments s21 and s22, the circumferential length of the side wall is reduced by the amount of the overlap, so that reduction in the radial direction can be achieved.

Further, since the above-mentioned reduction in the radial direction is performed not by pushing the segment into the center but by folding a part of the segment, the external surplus space B5 is reduced accordingly. , A large internal surplus space B4 can be secured.

[Modifications and Classification of Tubular Deployable Structure] Next, modifications of the tubular deployable structure according to the present invention and the classification thereof will be described. FIG. 10 is a chart showing the classification of the tubular deployable structures according to the present invention. As shown in FIG. 10, the tubular deployment structure according to the present invention can be classified into a symmetric type and an asymmetric type according to its bending pattern. Further, the symmetric type can be classified into an axially symmetric type and a rotationally symmetric type. Here, the axially symmetric type has a bending pattern that is axially symmetric with respect to the central axis of the tubular deployment structure, and the rotational symmetry has a bending pattern that is rotationally symmetric about this central axis. Further, the axisymmetric type is classified according to the maximum number of overlapping segments. The number of overlapping segments indicates the number of overlapping segments in one unit as viewed in the direction of the central axis when the tubular deployment structure is folded.

<Axisymmetric type with a maximum overlap number of 4 or less> In order to reduce the thickness of the overlap portion, the maximum overlap number of the segments is limited to 4. An axisymmetric type having a maximum overlap number of 4 or less has the following geometric characteristics. Unit Width In the axially symmetric type having the maximum number of overlaps of 4 or less, the unit width W is represented by the following equation from the number k of the convex ridges c and the angle θ of the convex ridges c (see FIG. 11). In addition, convex top c ...
The term "top" refers to a top that projects outward when the tubular deployment structure is folded.

(Equation 1) As an example, FIG. 12 is a graph showing the relationship between the dimensionless unit width (W / R0) and the angle θ of the convex ridges c when there are six convex ridges c. In this case, the dimensionless unit width (W
/ R0) becomes the maximum when the angle of the convex ridges c is π / 3, and the number of units can be reduced by an increase in the unit width.

Radius at the time of folding The radius at the time of folding is the most important parameter in evaluating the folding efficiency of the tubular deployable structure. Equation (2) shows the radius ratio between the folded state and the expanded state of the tubular deployable structure using the number k of the convex peaks c and the angle θ of the convex peaks c as parameters.

(Equation 2) As an example, FIG. 13 is a graph showing the relationship between the radius ratio and the angle θ of the convex ridges c when there are six convex ridges c. In this case, the radius ratio between the folded state and the unfolded state becomes smaller as the angle θ of the convex ridges c decreases, and the folding efficiency is improved.

<Axisymmetric type where the maximum number of overlaps is greater than four>
If the number of overlaps of the axially symmetric segments can be a value larger than 4, the radius at the time of folding can be further reduced. FIG. 14 is a plan view showing the folded state of the axially symmetric type tubular development structure 1L having the maximum number of overlaps of 8, and FIG. 15 is a partially enlarged view of the cylindrical deployment structure 1L. The respective parameter values of the tubular developed structure 1L are the number k of the convex ridges c ..., the angle θ of the convex ridges c ... / 6, and the maximum number of overlapping segments dmax = 8. FIG.
In the middle, W3 shows an area where eight segments in one unit overlap.

<Standard rotationally symmetric type> The rotationally symmetric type is classified into a standard rotationally symmetric type and a general rotationally symmetric type. FIG. 16 is a plan view of the standard rotationally symmetric tubular deployment structure 100S in a folded state. The standard rotationally symmetric type is characterized by the inner edge Pin and the outer edge Pout being parallel, and has a higher folding efficiency than the general rotationally symmetric type. Edge length of convex apex The angle of the convex apex c is represented by the number of the convex apex c, and the edge length L of the convex apex c is represented by the number k of the convex apex c as follows.

(Equation 3) Unit Width The dimensionless unit width (W / R0) is represented by the following equation depending on the number of convex ridges c.

(Equation 4) Radius at the time of folding The radius ratio at the time of folding and at the time of unfolding is expressed by the number of convex ridges c as follows.

(Equation 5) <General Rotation Symmetric Type> FIG. 17 is a plan view of the general rotation symmetric type cylindrical deployment structure 100G in a folded state. The general rotationally symmetric type includes a structure in which the inner edge Pin and the outer edge Pout are not parallel, and there are a plurality of parameters for determining the structure. Various structures can be selected by changing a plurality of parameters, and this can be said to be a characteristic characteristic of general rotational symmetry.

<Application of Cylindrical Deployable Structure> As an application of the tubular deployable structure, a dust shield that protects a space system from meteorites and crushed cosmos can be considered. FIG. 18 is a schematic diagram showing an application example of the tubular deployment structure. In FIG. 1, reference numeral 1 denotes a tubular deployable structure, 200 denotes a space shuttle, and 201 denotes a space system that needs to be protected from meteorites and the like. When the axially symmetric tubular deployment structure 1 having the maximum number of overlaps of 4 is used as a dust shield, when the dust shield is deployed, the geometric parameters of the dust shield are calculated according to the above equations (1) and (2). can get. For example, assuming that the diameter 2R0 required at the time of development is 6 m, the length in the axial direction is 10 m, and the number of the convex ridges c is 6, the other geometric parameters are the unit width W and the angle θ of the convex ridges c. , The number of units n are determined as follows. W = 0.85 [m], θ = 0.3 [rad], n =
12 As another application example of the tubular deployment structure, for example, it is conceivable to apply the tubular deployment structure when building a base in a cave of the moon. The entrance to the cave is generally narrower than the interior of the cave. Therefore, it is possible to build a base in the cave in a short period of time by expanding the tubular deployment structure through the entrance in the folded state and deploying it inside the cave.

[0042]

According to the first aspect of the invention, three-dimensional expansion and contraction in the axial direction and the direction of the closed curve can be performed.
The degree of overall expansion and contraction is increased, and, for example, when a tubular deployment structure is transported or temporarily stored in some storage space, efficient space utilization can be achieved. Therefore, for example, in the case of transporting this tubular deployment structure or temporarily storing it in some storage space, efficient space utilization can be achieved.

According to the second aspect of the present invention, four overlapping segments can be avoided, and the radial length of the folded state can be minimized. Therefore, the overall reduction efficiency of the tubular deployment structure can be increased.

According to the third aspect of the present invention, the overlap of the second segment and the first segment reduces the circumferential length of the side wall, thereby achieving reduction in the radial direction. Therefore,
The reduction efficiency in the radial direction can be particularly increased.
Further, since the radial reduction is performed not by pushing the segment into the center but by folding a part of the segment, the internal space can be made relatively large accordingly. Is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state when a tubular deployable structure according to a first embodiment of the present invention is deployed.

FIG. 2 is a perspective view showing a state where the tubular deployment structure of FIG. 1 is folded.

FIG. 3 is a developed plan view for explaining a fold of the tubular developed structure of FIG. 1;

FIG. 4 is a top view of the tubular deployment structure of FIG. 1 in a state where bending is maximized.

5A and 5B are perspective views showing a process in which segments joined by an open pattern are bent, wherein FIG. 5A is a first process, FIG. 5B is a second process, and FIG. Things.

FIG. 6 is a perspective view showing a state when the tubular deployment structure according to the second embodiment is deployed.

FIG. 7 is a perspective view showing a state where the tubular deployment structure of FIG. 6 is folded.

FIG. 8 is a plan development view for explaining a fold of the tubular development structure of FIG. 6;

FIG. 9 is a top view of the tubular deployment structure of FIG. 6 in a state where bending is maximized.

FIG. 10 is a chart showing classifications of tubular deployable structures according to the present invention.

FIG. 11 is a plan view showing parameters of an axisymmetric type (the maximum number of overlaps is 4 or less).

FIG. 12 is a graph showing the relationship between the dimensionless unit width (W / R0) of the axisymmetric type (the maximum number of overlaps is 4 or less) and the angle θ of the convex apex.

FIG. 13 is a graph showing the relationship between the radius ratio of the axially symmetric type (the maximum number of overlaps is 4 or less) and the angle θ of the convex top.

FIG. 14 is a plan view showing a folded state of an axially symmetric type (maximum number of overlaps: 8) tubular deployment structure.

FIG. 15 is a partially enlarged view of the tubular deployment structure of FIG. 14;

FIG. 16 is a plan view of a standard rotationally symmetric tubular deployment structure in a folded state.

FIG. 17 is a plan view of a general rotationally symmetric tubular deployment structure in a folded state.

FIG. 18 is a schematic view showing an application example of the tubular deployment structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cylindrical deployment structure (1st Embodiment) 1A Side wall s ... Segment M1 module Pc Joint part of a closed pattern Po Joint part of an open pattern 100 Cylindrical deployment structure (2nd Embodiment) 100A Side wall M100 Module s11, s12 First segment s21, s22 Second segment s31, s32 Third segment 1L Axisymmetric tubular deployment structure (segment overlap number is greater than 4) 100S Rotationally symmetric tubular deployment structure (Standard type) 100G Rotationally symmetrical cylindrical deployment structure (general type)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F16S 1/00-5/00 E04B 1/344 B65D 21/08

Claims (3)

(57) [Claims] 1. A tubular deployment structure surrounded by a side wall and capable of expanding and contracting the entire shape, wherein the side wall is a trajectory obtained by moving an arbitrary closed curve along an arbitrary axis. In addition, a plurality of segments can be bent in the axial direction and the closed curve direction, and the four or more adjacent segments are joined in a state where the joined sides intersect at one point. The joining pattern of four or more segments where the joining sides intersect at one point is a closed pattern that is bent while reducing the inner angle on the closed curve with the bending in the axial direction, It consists of an open pattern that is bent while increasing the internal angle on the closed curve with the bending in the axial direction, and in the closed curve direction in these closed patterns and open patterns.
A tubular deployment structure characterized by performing the expansion and contraction deployment in the axial direction and the plane direction including the closed curve while the closed curve is closed by bending the segments joined alternately . 2. The side wall is formed by repeatedly joining the same module as the module with a predetermined number of connected segments as one module in the axial direction and the closed curve direction. 4 joined by
Two segments that are composed of two segments and that are continuous in the closed curve direction are provided with substantially the same length in the closed curve direction. When the degree of bending in the axial direction is maximum, the closed curve of the module is provided. 2. The tubular deployment structure according to claim 1, wherein both ends in the direction are bent at substantially contact angles when viewed from the axial direction. 3. 3. The side wall includes a predetermined number of connected segments as one module, and the same module as the module is repeatedly joined in the axial direction and the closed curve direction. The first segment and the second segment are joined in a closed pattern, and the first segment and the second segment are joined in a closed pattern. Third
The segments are joined by an open pattern, and when the degree of bending in the axial direction is maximum, the degree of bending between the first segment and the second segment is maximized, and the second segment is connected to the first segment. The tubular deployment structure according to claim 1, wherein the tubular deployment structure is substantially covered.