JPH0632293A - Development type truss - Google Patents

Abstract

PURPOSE:To realize light weight and at the same time reliable folding develop ment action. CONSTITUTION:A plurality of cross beam members 12, 13 are radially extended out from both ends of a center lengthwise beam member 11, and fellow end portions are turnably joined together, and lengthwise beam members 14 are provided between the tip portions of the cross beam members 12, 13, and combination to an approximate four side shape is made, and turntable couping is made, and first wire members 15 are stretchingly suspended in approximate X shapes between both opposite end portions of the lengthwise beam members 14. Second wires 16 are respectively and stretchingly suspended between the intersection points of the first wire members 15 and the center lengthwise beam member 11, and slant members 17 are hangingly provided between the diagonal lines of approximate quadrilateral shapes formed with the center lengthwise beam member 11, cross beam members 12, 13 and lengthwise beam members 14, and a polygonal post development truss 10 that is turnably joined together is formed, and constitution that is able to conduct folding development freely is made by providing an umbrella mechanism 18 for folding development drive at the center lengthwise beam member 11 of the development truss 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deployable truss structure suitable for a support structure such as a structure constituting a space station or an antenna device constructed in outer space.

[0002]

2. Description of the Related Art In the field of space development, the development of a space station concept is under way. In this space station concept, various skeletons of the space station and various deployable truss structures including the antenna support structure are assembled on the ground in advance, then folded and accommodated and a transportation means such as a space shuttle is used. A method of transporting to outer space, deploying it in outer space, and constructing it is being considered and developed.

As such a deployable truss structure,
For example, there is a combination method called a multi-module in which a plurality of expansion trusses in module units in which a plurality of connecting rods are connected in a cubical truss are combined into a desired shape as described in JP-A-61-98699. Has been taken. The deployable truss structure of such a combination system is
Stretchable drive members are respectively arranged on the diagonals of the cubic surface of the plurality of deployable trusses, and the drive members of the plurality of deployable trusses are synchronously driven to expand and contract by a drive motor, whereby a structure is formed. The entire folding expansion is performed.

By the way, such a deployable truss structure has a reliable weight and operation control depending on the number of connecting rods constituting the deployable truss and the number of driving means such as a folding deploying drive motor. It is determined. Therefore, in the above-described conventional deployable truss structure, it is difficult to improve the weight and the reliability of the folding deploying operation control in terms of the number of parts and the number of deployment driving motors. In addition, considering the application in the field of space development, which requires highly accurate motion control, it was not satisfactory.

In the field of recent space development,
Along with the diversification of operations, there is a demand for increasing the size of a deployable truss structure used in, for example, a large-diameter antenna reflector. Therefore, large size, light weight, and
Moreover, development of a deployable truss structure capable of highly accurate motion control is one of the important issues.

[0006]

As described above, in the conventional deployable truss structure, if the size of the deployable truss structure is increased, the weight becomes heavy and the reliability of operation control is not satisfactory. Had a problem.

The present invention has been made in view of the above circumstances, and provides a deployable truss structure which has a simple structure, can promote the weight reduction, and can improve the reliability of operation control. The purpose is to provide.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a pair of lateral beam members are radially extended substantially in parallel from both ends of the central vertical beam member, and each end is turned to the end of the central vertical beam member. The vertical beam members are movably connected to each other, and the vertical beam members are respectively installed between the end portions of these horizontal beam members so as to be combined in a substantially quadrilateral shape. The first wire member is stretched between the ends of the first wire member in a substantially X shape, and the second wire is stretched between the intersection of the first wire members and the central beam member, and A polygonal column deployable truss in which diagonal members are respectively installed between diagonal lines of a substantially quadrangular shape formed by the central vertical beam member, a pair of horizontal beam members, and vertical beam members, and end portions are rotatably coupled to each other, The diagonal member is disposed between the central longitudinal beam member and the plurality of diagonal members of the prismatic truss. Around the end of the telescopic drive to the central longitudinal beam member, said cross beam member, the longitudinal beams member, and to constitute a deployable truss structure oblique member and a bevel mechanism for deploying folded revolvable.

According to the above construction, the polygonal column deployable truss is
When the diagonal member is driven to expand and contract by the umbrella mechanism, the horizontal beam member and the vertical beam member are rotated around the central vertical beam member and folded and deployed. As a result, the entire folding and unfolding operation can be performed with a configuration in which the umbrella mechanism is provided as a drive source for folding and unfolding driving with only the minimum number of components arranged between the central vertical beam member and the diagonal member. Therefore, it is possible to form a structure that is lightweight and realizes highly reliable operation control.

Further, according to the present invention, a plurality of a pair of transverse beam members are radially extended substantially in parallel from both ends of the central vertical beam member, and each end is rotatably coupled to the end of the central vertical beam member. A vertical beam member is erected between the end portions of these horizontal beam members and combined in a substantially quadrilateral shape, and the end portions of the vertical beam members are rotatably coupled to each other, and the end portions of the pair of vertical beam members opposite to each other are connected. A first wire member is stretched in a substantially X shape, and a second wire is further stretched between the intersection of the first wire members and the central beam member, and the central longitudinal beam member, A plurality of polygonal column deployment trusses in which diagonal members are respectively installed between diagonal lines of a substantially quadrilateral shape formed by a pair of horizontal beam members and vertical beam members, and the ends are rotatably coupled, and a plurality of these polygonal column deployment trusses The central longitudinal beam member of the truss and the plurality of slant members are respectively arranged, A plurality of umbrella mechanisms for rotationally folding and expanding the horizontal beam member, the vertical beam member, and the slant member around one end of the central vertical beam member by expanding and contracting the material, and the plurality of polygonal column expansion trusses. A deployable truss structure is configured by including a connecting means for connecting the plurality of polygonal column deployable trusses so that the vertical beam members forming one side are abutted.

According to the above structure, in the plurality of polygonal column deployable trusses coupled and arranged through the coupling means, the diagonal members are driven to expand and contract by the respective umbrella mechanisms, so that the horizontal beam members and the vertical beam members are respectively formed. The central vertical beam member is rotated in synchronization with the central vertical beam member to be folded and deployed. Thereby, as a driving source for folding and unfolding driving, a polygonal column unfolding truss having a small number of components only for disposing the umbrella mechanism between the central longitudinal beam member and the slant member is used, and it is large, lightweight, and It is possible to form a structure that realizes highly reliable operation control.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A deployable truss structure according to an embodiment of the present invention will be described in detail below with reference to the drawings. Figure 1
1 shows a polygonal column expansion truss 10 having a substantially hexagonal prism shape, which is a basic module applied to the expansion type truss structure according to one embodiment of the present invention.

That is, the polygonal column deployable truss 10 comprises a pair of lateral beam members 12 extending substantially in parallel from both ends of the central vertical beam member 11.
13 are radially extended and each end is a central vertical beam member 1.
1, which are rotatably coupled to one end of the cross beam members 12,
Vertical beam members 14 are respectively installed between the front end portions of 13 and are combined in a substantially quadrilateral shape, and the respective end portions are rotatably coupled. Then, a first wire member 15 is stretched in a substantially X-shape between both ends of the vertical beam members 14 that face each other, and the intersection of the first wire members 15 and one end of the center beam member 11 are extended. The second wires 16 are respectively stretched between them. Further, the central vertical beam member 11 and the pair of horizontal beam members 1
An extendable slanting member 17 is installed between diagonal lines of the substantially quadrilateral shape formed by the members 2, 13 and the vertical beam member 14, and the ends thereof are rotatably coupled.

An umbrella mechanism 18 is disposed on the central vertical beam member 11 of the polygonal column deployable truss 10 corresponding to one end of the slant member 17. In the umbrella mechanism 18, for example, as shown in FIG. 2, a ball screw portion 11a is rotatably provided at one end of the central vertical beam member 11. The ball screw portion 11a has a motor 18
The rotating shaft of a is connected via a coupling 18b, and the rotational force of this motor 18a is transmitted via the coupling 18b. The ball screw portion 18a has a screw receiving portion 18c.
The screw receiving portion 18c is supported with a plurality of tension rods 18d at one end of the tension rod 18d at a predetermined interval corresponding to the slant member 17.

A link receiving portion 18e is slidably attached to the ball screw portion 11a in the directions of arrows A and B.
A compression spring 18f is provided between the link receiving portion 18e and the screw receiving portion 18c so as to face the c. One end of a link rod 18g is linked to the link receiving portion 18e at a predetermined interval corresponding to the inclined member, and the other end of the link rod 18g is connected to the inclined member 17g.
Are linked to each other at one end. The other end of the tension rod 18d is linked to the intermediate portion of the link rod 18g.

That is, in the umbrella mechanism 18, when the motor 18a is rotationally driven, the rotational force is transmitted through the coupling 18b and guides the screw receiving portion in the directions of arrows A and B in accordance with the rotational direction. Then, the screw receiving portion 18c moves and biases the link receiving portion 18c in the same direction via the compression spring 18f along with the movement in the arrow A and B directions to rotate the tension rod 18d and the link rod 18g. Energize. As a result, in the umbrella mechanism 18, when the motor 18a is rotationally driven and the ball screw portion 11a is rotationally driven and the screw receiving portion 18c is moved in the directions of arrows A and B, the link receiving portion 18e is compressed in conjunction with this. It is urged to move in the same direction via a spring 18f, and expands and contracts the oblique member 17 via a tension rod 18d and a link rod 18g.

When the diagonal member 17 is extended, the polygonal column deployable truss 10 is provided with the lateral needle member 1 through the diagonal member 17.
2, 13 and the vertical beam member 14 are rotatably biased around one end of the central vertical beam member 11 to be folded and housed. When the diagonal member 17 is contracted, the polygonal column deployment truss 10 is configured such that the lateral needle members 12 and 13 and the vertical beam member 14 are inverted about one end of the central vertical beam member 11 via the diagonal member. Expanded into shape.

In the above structure, for example, when an antenna reflecting mirror having a relatively small diameter is constructed, the polygonal column deployable truss 10 is directly used as an antenna reflecting mirror supporting structure, and a mounting member called a stud is provided on one side thereof. An upright mirror surface support structure is provided, and a mesh mirror surface made of, for example, a flexible conductive film is attached to the mirror surface support structure to form a desired mirror surface. As a result, when the polygonal column deployment truss 10 is folded and driven by the umbrella mechanism 18 as described above, the mesh mirror surface made of, for example, a flexible conductive film stretched on one surface is mirror-finished in conjunction with it. The desired mirror surface is spread through the support structure.

Further, in the case of constructing the antenna reflector supporting structure, the pair of lateral beam members 12, 13 of the polygonal column deployable truss 10 are formed so that the member lengths thereof are different from each other and the other is shorter. Thus, in the expanded state, it is easily realized that each one end of the central vertical beam member 11 and the vertical beam member 14 is formed into a substantially spherical surface or a mirror surface shape such as a parabolic surface shape.

As described above, the deployable truss structure is
A pair of horizontal beam members 1 extending substantially in parallel from both ends of the central vertical beam member 11
2 and 13 are radially extended and each end portion is rotatably coupled to the end portion of the central vertical beam member 11, and these lateral beam members 1
A vertical beam member 14 is erected between the end portions of 2 and 13 and combined in a substantially quadrilateral shape, and the end portions thereof are rotatably coupled to each other,
A first wire member 15 is stretched in a substantially X-shape between both ends of the vertical beam members 14 that face each other, and further, a first wire member 15 is stretched between the intersection of the first wire members 15 and the central beam member 11. 2 wires 16 are respectively stretched, and the central longitudinal beam member 11,
A diagonal column member 17 is installed between diagonal lines of a substantially quadrilateral shape formed by a pair of horizontal beam members 12 and 13 and a vertical beam member 14 to form a polygonal column deployable truss 10 in which ends are rotatably coupled. The central vertical beam member 11 of this polygonal column deployment truss 10
And the umbrella mechanism 18 is disposed between the plurality of diagonal members 17, and the umbrella mechanism 18 is drive-controlled to extend and retract the diagonal member 17,
The horizontal beam members 12, 13, the vertical beam member 14, and the diagonal member 17 are configured to be foldably developed by pivoting around one end of the central vertical beam member 11.

According to this, as a drive source for folding and unfolding drive, the umbrella mechanism 18 is provided as a minimum number of component parts which are disposed between the central vertical beam member 11 and the slant member 17 of the polygonal column deployable truss 10. Since the entire folding and unfolding operation is not required, it is possible to promote the weight reduction and to form a structure capable of realizing highly reliable operation control. In particular, remarkable effects are expected in terms of promoting weight reduction, which is strongly required in space development, and improving reliability of deployment.

Further, in the above embodiment, the case where one polygonal column deployable truss 10 is used is described, but the present invention is not limited to this, and a plurality of polygonal column deployable trusses 10 are combined and connected. Is also good.

For example, as shown in FIGS. 3 and 4, seven pieces are combined so that one sides of their outer peripheries face each other to form a large antenna reflector supporting structure 100. That is, the polygonal column deployable trusses 10 are joined to each other through the joining mechanism 20 on one side of their outer peripheries. The coupling mechanism 20 includes a pair of vertical beam members 20a, 20a and a pair of horizontal beam members 2 as shown in FIG.
A plurality of joint portions 21 in which 0b and 20b are combined in a substantially quadrilateral shape and whose ends are rotatably coupled are formed corresponding to a shape in which seven polygonal column expansion trusses 10 are combined. The part 21 includes one vertical beam member 20a,
For example, one of the vertical beam members 14 of the polygonal column deployable truss 10 is rigidly connected.

An intermediate portion of the transverse beam member 20b of the coupling portion 21 of the coupling mechanism 20 is provided so as to be bendable via a rotary drive portion 20c. For example, a spring mechanism or a drive motor is incorporated in the rotation drive unit 20c.
Alternatively, the horizontal beam member 20b is moved by the drive motor to the vertical beam member 2
It is rotated around 0a and folded and unfolded. As a result, in the coupling mechanism 20, the horizontal beam member 20b is different from the vertical beam member 20a.
It is rotated around and folded and unfolded.

On the antenna reflector supporting structure 100, as shown in FIG. 6, a mirror surface supporting structure 110 in which a mounting member called a stud is erected is provided so as to correspond to the mirror surface shape, and on the mirror surface supporting structure 110. A mesh mirror surface 120 made of, for example, a flexible conductive film is adhered to this to form a desired mirror surface.

Even in the case where the plurality of polygonal column-deployed trusses 10 are combined and combined to form the antenna reflector supporting structure 100, the pair of lateral beam members 12, 13 of the polygonal column-deployed truss 10 are described above. By forming the member lengths of the central vertical beam member 11 and the vertical beam member 14 so that they are different from each other so that the other is shorter than the other. Forming into a shape is easily realized.

Antenna reflecting mirror support structure 1 having the above structure
When 00 is unfolded from the folded accommodation state shown in FIG. 7A, first, as shown in FIG.
The rotation drive unit 20c of 0 is driven to rotate the transverse beam member 20b that is folded and accommodated in the deployment direction to deploy the coupling mechanism 20. Next, the umbrella mechanisms 18 of the plurality of polygonal column deployment trusses 10 are synchronously driven, for example, as described above, and the oblique member 17 is contracted. As a result, the plurality of polygonal column deployable trusses 10 are deployed by rotating the horizontal beam members 12 and 13 and the vertical beam member 14 with respect to the central vertical beam member 11 (see FIG. 7C). Here, the plurality of polygonal column deployable trusses 10 deploy the mirror surface support structure 110 to deploy the mesh mirror surface 12a into a desired mirror surface shape as it deploys (see FIG. 3).

When the expanded antenna reflecting mirror support structure 100 is to be folded and housed, each umbrella mechanism 18 of the polygonal column expansion truss 10 is first inverted and driven to extend the slant member 17. As a result, the transverse beam members 12, 13 and the vertical beam member 14 are folded and accommodated in the polygonal column deployable truss 10 with respect to the central vertical beam member 11. Next, the coupling mechanism 1
The 0 rotation drive unit 20c is reversed. As a result, in the coupling mechanism 20, the horizontal beam members 12 and 13 are folded and housed from the middle portion and are folded and housed around the vertical beam member 14, and the mirror surface support structure 110 is folded and housed together with the mesh mirror surface 120 (FIG. 7 (a)).

In this way, a plurality of polygonal column deployable trusses 10 are provided.
Is capable of forming a larger antenna reflector by combining and using the coupling mechanism 20 to meet the demand for larger structures, which is strongly demanded in recent space development. It becomes possible to deal with it easily.
Even in this case, as described above, the polygonal column deployment truss 10 having a small number of components is configured by combining and coupling it by using the coupling mechanism 20, so that it is sufficient to reduce the weight and improve the reliability of the deployment. Can respond.

In the above embodiment, a plurality of connecting portions 2 are used as connecting means for connecting the plurality of polygonal column deployable trusses 10.
Using the coupling mechanism 20 having No. 1, one of the vertical beam members 20a of the coupling mechanism 20 is rigidly coupled so as to share one of the vertical beam members 14 of the polygonal column deployment truss 10. However, without being limited to this, for example, the vertical beam members 14 of the plurality of polygonal column-deployed trusses 10 may be directly and rigidly connected so as to be shared.

Further, in each of the above-mentioned embodiments, when the polygonal column deployable truss 10 is folded and deployed, the umbrella mechanism 18 is used to drive the diagonal member 17 to expand and contract, but the invention is not limited to this. It is also possible to fold and deploy by controlling one end of 17 to slide with respect to the central vertical beam member 11.

Further, in the above-mentioned embodiment, the case where seven polygonal column deploying trusses 10 are combined and combined in a plane to form the antenna reflector supporting structure 100 has been described as a representative.
Not limited to this combination, various combination couplings are possible. And as an applicable range, it is also possible to apply to various structures including a skeleton of a space station and various buildings constructed on the ground. Therefore, the present invention is not limited to the above-described embodiments, and it is needless to say that various modifications can be made without departing from the scope of the present invention.

[0033]

As described above in detail, according to the present invention, a deployable truss structure having a simple structure, which can promote weight reduction and can improve reliability of operation control. Can be provided.

[Brief description of drawings]

FIG. 1 is a diagram showing a deployable truss of a deployable truss structure according to an embodiment of the present invention.

FIG. 2 is a diagram showing the umbrella mechanism shown in FIG.

FIG. 3 is a diagram showing another embodiment of the present invention.

FIG. 4 is an exploded view of the antenna reflector supporting structure of FIG.

FIG. 5 is a view showing the connection mechanism of FIG. 3 taken out.

FIG. 6 is an exploded view of FIG.

FIG. 7 is a diagram shown for explaining the folding and unfolding operation of FIG. 3;

[Explanation of symbols]

10 ... Polygonal column deployment truss, 11 ... Center vertical beam member, 11a
... ball screw part, 12, 13 ... horizontal beam member, 14 ... vertical beam member, 15, 16 ... first and second wire members, 17 ... diagonal member, 18 ... umbrella mechanism, 18a ... motor, 18b ... coupling, 18c ... screw receiving part, 18d ... tension rod, 18e ... link receiving part, 18f ... compression spring, 18g
... link rod, 20 ... coupling mechanism, 20a ... vertical beam member,
20b ... Horizontal beam member, 20c ... Rotation drive part, 21 ... Coupling part, 100 ... Antenna reflecting mirror support structure, 110 ... Mirror surface support structure, 120 ... Mesh mirror surface.

Claims (8)

[Claims] 1. A pair of lateral beam members are radially extended substantially in parallel from both ends of the central vertical beam member, and each end is rotatably coupled to the end of the central vertical beam member. A vertical beam member is erected between the front end portions and combined in a substantially quadrilateral shape, and the respective end portions are rotatably coupled to each other, and the first beam is provided between both end portions of the vertical beam members which are opposed to each other. The wire member is approximately X
And a second wire between the intersection of the first wire members and the central beam member.
And a polygonal column deployable truss in which diagonal members are installed between diagonal lines of a substantially quadrilateral shape formed by the central vertical beam member, a pair of horizontal beam members, and vertical beam members, and the ends are rotatably coupled. The horizontal beam member, the vertical beam member, and the horizontal beam member, which are disposed between the central vertical beam member and the plurality of diagonal members of the polygonal column deployable truss, and which are driven to expand and contract, with one end of the central vertical beam member being the center. A deployable truss structure, comprising: an umbrella mechanism that folds and deploys a diagonal member in a rotatable manner. 2. The umbrella mechanism causes one end of the diagonal member to slide along the central vertical beam member, and the lateral beam member, the vertical beam member, and the diagonal member with one end of the central vertical beam member as a center. 2. A foldable and unfoldable structure that is rotatable.
The described deployable truss structure. 3. The deployable truss structure according to claim 1, wherein the polygonal column deployable truss is composed of a pair of lateral beam members having different member lengths, and an antenna reflecting mirror surface is formed on one surface thereof. . 4. A pair of horizontal beam members are radially extended substantially in parallel from both ends of the central vertical beam member, and each end is rotatably coupled to the end of the central vertical beam member. A vertical beam member is erected between the front end portions and combined in a substantially quadrilateral shape, and the respective end portions are rotatably coupled to each other, and the first beam is provided between both end portions of the vertical beam members which are opposed to each other. The wire member is approximately X
And a second wire between the intersection of the first wire members and the central beam member.
And a plurality of polygonal column expansion trusses in which diagonal members are respectively installed between diagonal lines of a substantially quadrilateral shape formed by the central vertical beam member, a pair of horizontal beam members, and vertical beam members, and the ends are rotatably coupled. , Each of the plurality of polygonal column deployment trusses is disposed between the central vertical beam member and the plurality of diagonal members, and the lateral beam member is centered around one end of the central vertical beam member by driving the diagonal member to expand and contract. The vertical beam members and the plurality of umbrella mechanisms that fold and deploy the diagonal members in a rotational manner, and the vertical beam members that form one side of the plurality of polygonal column deployment trusses are abutted against each other so that the plurality of polygonal column deployment trusses are formed. A deployable truss structure comprising a connecting means for connecting. 5. The umbrella mechanism causes one end of the diagonal member to slide along the central vertical beam member, and the lateral beam member, the vertical beam member, and the diagonal member are centered on one end of the central vertical beam member. 2. A foldable and unfoldable structure that is rotatable.
The described deployable truss structure. 6. The deployable truss structure according to claim 4, wherein the connecting means is arranged so as to be independently foldable and deployable with respect to the plurality of polygonal column deployable trusses. 7. The deployable truss structure according to claim 6, wherein the joining means is formed by joining and supporting at least vertical beam members of the plurality of polygonal column deployable trusses. 8. The deployable mold according to claim 4, wherein each of the plurality of polygonal column deployable trusses is composed of a pair of transverse beam members having different member lengths, and an antenna reflecting mirror surface is formed on one surface thereof. Truss structure.