JPH0794237B2 - Truss structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a space base constructed in outer space,
The present invention relates to a truss structure suitable for a deployed structure such as a parabolic antenna support structure provided on a platform or the like.

(Prior Art) In the field of space development, truss structures such as parabolic antenna support structures to be built in outer space are folded in advance on the ground, mounted on spacecraft, and transported to outer space. A method of constructing by deploying in outer space is being considered. As such a deployable truss structure, a two-dimensional structure called a deployable truss having a truss structure in which connecting rods are combined and combined in a cubic shape, which is described in JP-A-61-98699, is known. There is.

However, any of the conventional deployable truss structures has a large number of components including the connecting rod due to the truss structure, and it is difficult to reduce the number of components. When formed, the weight of the structure was very heavy. This problem becomes a big problem especially when the large-scaled demanded in the recent field of space development is promoted. Therefore, in the field of space development in the future, the expansion and folding operation of truss structures will be high. To ensure reliability and promote weight reduction,
It is an urgent task.

(Problems to be Solved by the Invention) As described above, the conventional truss structure has a problem that it is difficult to increase the size thereof, because the truss structure has many components and becomes heavy. It was

The present invention has been made in view of the above circumstances, and provides a truss structure capable of ensuring high-precision operation control, simplifying the configuration, and promoting weight reduction. To aim.

[Structure of the Invention] (Means and Actions for Solving the Problem) The present invention assembles connecting members, which are two connecting rods rotatably connected to each other, in a triangular shape, and rotatably connects the respective connecting portions. Two triangular connecting members are arranged so as to oppose each other, a connecting rod is installed between the connecting portions, and a plurality of triangular prism truss elements in which both ends of the connecting rod are rotatably connected to the connecting portion are combined. A truss structure, which is installed between the connecting portions of the connecting rods of the connecting members of the pair of triangular connecting members,
The bending member is provided with a bending portion at an intermediate portion of which an end portion is rotatably coupled to the coupling portion and a coupling portion of the pair of triangular coupling members, and one end thereof is the triangular shape. One of the coupling members is rotatably coupled to the coupling portion of the coupling rod of the coupling member, and the other end of the triangular engaging member is rotatably coupled to the rotatable coupling portion on the other side of the coupling member. A combined drive member, and one end thereof is rotatably connected to a connecting portion of a connecting rod of the connecting member on one side of the triangular connecting member,
A diagonal member whose other end is rotatably coupled to a coupling portion of the coupling member on the other side of the triangular coupling member, and coupling of the coupling member on the other side of the triangular coupling member engaged with the driving member. A connecting rod that constitutes the triangular prism truss element by controlling the axial movement of the connecting portion of the rod, and rotationally biases the diagonal member,
A truss structure is configured by including a driving unit that folds and develops the triangular prism truss element.

According to the above configuration, the triangular prism truss element is interlocked with the driving of the driving means, and the connecting portion of the connecting rod of the connecting member on the other side of the triangular connecting member is axially moved and biased with respect to the driving member. Thus, the connecting rod, the bending member, and the constituent members of the slanting member are rotated around the driving member to be folded and expanded. As a result, the number of components including the drive means forming the triangular prism truss element is reduced as compared with the conventional cubic space truss, and the weight reduction of the structure is promoted,
It is possible to realize a highly reliable folding and unfolding operation.

Further, according to the present invention, two triangular connecting members having two connecting rods rotatably connected are combined in a triangular shape and each connecting portion is rotatably connected, and two triangular connecting members are arranged so as to face each other. A truss structure constructed by combining a plurality of triangular prism truss elements in which a connecting rod is installed between parts, and both ends of the connecting rod are rotatably connected to a connecting part, wherein the pair of triangular connecting members comprises: A bending member which is provided between the connecting portions of the connecting rods of the connecting members and has a bending portion at an intermediate portion whose end portion is rotatably connected to the connecting portion, and the pair of triangles. The connecting member is provided between the connecting portions of the connecting member, one end of which is rotatably connected to the connecting portion of the connecting rod of the connecting member on one side of the triangular connecting member, and the other end of which is the other side of the triangular engaging member. And a driving member rotatably connected to the connecting portion of the connecting rod of the connecting member. A member, one end of which is movably engaged with the drive member in the axial direction, and the other end of which is rotatably coupled to a coupling portion of the connecting member on the other side of the triangular coupling member; The other side of the triangular coupling member, which is engaged with the drive member, is pivotally biased to rotate the coupling portion on the other side of the triangular coupling member to control the axial movement of the coupling rod, the bending member, and the diagonal member. Then, the truss structure is configured by including the driving means for folding and expanding the triangular prism truss element.

According to the above configuration, the triangular prism truss element is interlocked with the driving of the driving means, and one end of the diagonal member is axially moved and biased with respect to the driving member, so that the connecting rod and the bending member are The constituent members are rotated about the driving member to be folded and deployed. As a result, the number of components including the drive means forming the triangular prism truss element is reduced compared to the conventional cubic space truss, and the weight reduction of the structure is promoted, and the reliable folding and unfolding operation is realized. It will be possible.

(Example) Hereinafter, the Example of this invention is described in detail with reference to drawings.

FIG. 1 shows a triangular prism truss element 10 used in a truss structure according to an embodiment of the present invention. For example, as shown in FIG. 2, six triangular prism truss elements 10 are constructed in outer space. The structure 20 forming the parabolic antenna is formed in combination. And this structure 20 has 6
The opposing faces of the adjacent trusses of the triangular prism truss elements 10 are shared, and the mesh antenna 30 (second
(Indicated by diagonal lines in the figure) is stretched.

That is, the triangular prism truss element 10 has two connecting rods 11
As shown in FIGS. 4 and 5, a connecting member 14 is formed which is rotatably connected via connecting members 12 and 13.
The three connecting parts are combined in a triangular shape, and the connecting parts are rotatably connected via connecting members 15 and 16 to form a triangular connecting member 17, as shown in FIGS. 5 and 6. (See FIG. 1). Two of the triangular connecting members 17 are arranged so as to face each other,
A connecting rod 18 is installed between the mutual connecting members 15 and 16, and both ends of the connecting rod 18 are rotatably connected to the connecting members 15 and 16 (see FIGS. 5 and 6). Then, the triangular prism truss element 10 is provided with a bending member 19 having a fold portion 19a between the connecting portions of the connecting rods 11 of the connecting members 14 of the triangular connecting members 17, 17 respectively. Of these, the bending member 19 provided on one side of the triangular connecting members 17, 17 has its end rotatably connected to the connecting member 12 (see FIG. 3). As shown in FIG. 4, the bending member 19 provided on the other side of the triangular connecting members 17 and 17 has its end portion rotatably connected via a connecting member 20.

In addition, each triangular connecting member 1
A connecting member for connecting the connecting rod 11 of the connecting member 14 in 7,17
A driving member 21 for folding and unfolding driving is provided between 12 and 20, and one end of the driving member 21 is rotatably coupled to the coupling member 12 (see FIG. 3). The other end of the drive member 21 is a bending member 19
Is rotatably coupled to a coupling member 20 for rotatably coupling (see FIG. 4). Further, the drive member 21 is formed with a screw portion 21a from one end portion toward the other end portion. The screw portion 21a is rotationally driven in the clockwise and counterclockwise directions in the figure in conjunction with the driving of a drive motor (not shown). Then, a connecting member 13 for connecting the connecting rod 11 of the connecting member 14 on one side of the triangular connecting members 17, 17 is screwed to the screw portion 21a so as to be screw-adjustable (see FIG. 4), and the rotation direction thereof. The coupling member 13 according to the axis (arrow A,
B) Control the movement in the direction.

Further, in the triangular prism truss element 10, the oblique member 22 is connected to the connecting portion member 12 for connecting the connecting rod 11 of the connecting member 14 on one side of the triangular connecting members 17 and 17, and the connecting portion on the other side of the triangular connecting members 17 and 17. The member 14 is erected between a connecting member 16 for connecting the member 14 in a triangular shape, and is rotatably connected to the connecting members 12 and 16 (see FIGS. 3 and 6).

In the above configuration, when the structure 20 is unfolded by combining a plurality of three-dimensional truss elements 10 and folding the structure 20, first, the drive motor of the drive member 21 of the plurality of triangular prism truss elements 10 via a command unit (not shown). (Not shown) is drive-controlled with a preset correlation, and the screw portions 21a thereof are rotationally driven. Then, as shown in FIGS. 7 (d) to (a), the triangular prism truss element 10 moves the connecting member 13 of the connecting member 14 forming the triangular connecting member 17 in the direction of arrow A, thereby connecting rods. 11,18, the bending member 19, and the slanting member 22 are urged to rotate in the developing direction and deployed,
Along with this, the structure 20 is expanded and the mesh antenna 30 is expanded (see FIG. 2).

When the structure 20 expanded as shown in FIG. 2 is to be folded and housed, the drive motor (not shown) of the drive member 21 of the triangular truss element 10 is passed through the command unit (not shown). Is driven to be reversed, and the screw portion 21a of the driving member 21 is reversed. This allows structure 20 to have its triangular prism truss elements.
The connecting member 13 for connecting the connecting rod 11 of the connecting member 14 forming the triangular connecting member 17 of 10 is moved in the direction of the arrow B, so that the connecting rods 11, 18, the bending member 19, and the oblique member 22 are folded. The triangular prism truss element 10 is folded by being urged to rotate, and the truss element 10 is folded and housed together with the mesh antenna 30 (see FIGS. 7A to 7D).

In this way, the truss structure has a screw portion that can be rotationally driven.
The driving member 21 for driving the folding and unfolding having the structure 21a is attached to the structure 20.
Pair of triangular connecting members 1 of triangular prism truss element 10 forming a
7 and 17 are provided so as to be bridged between the rotatable coupling portions of the intermediate portion of the connecting member 14, and the screw portion 21a of the drive member 21 is rotationally driven with a certain correlation for each triangular prism truss element 10, The constituent members of each triangular prism truss element 10 are configured to be folded and expanded around the driving member 21 so that the structure 20 is folded and expanded. According to this, the structure 20
It becomes possible to reduce to a minimum as compared with the conventional combination of the trusses which are combined in a box shape with the constituent members that form the structure. Since the number can be reduced, the weight can be promoted and the operation can be ensured. As a result, it becomes possible to cope with the improvement in reliability as well as the promotion of large-scaled demands in the field of recent space development.

The present invention is not limited to the above embodiment, but it is also possible to construct a triangular prism truss element 10a as shown in FIG. However, here, the same portions as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.

In the embodiment shown in FIG. 1, the connecting member 13 provided at the intermediate portion of the connecting member 14 forming one of the triangular connecting members 17, 17 of the triangular prism truss element 10 is folded by controlling the axial movement of the connecting member 13. Although constructed so as to be deployed, the triangular prism truss element 10a in the embodiment of FIG. 8 has a pair of triangular connecting members 17,
One end of the slant member 22 provided between the members 17 is controlled to move in the axial (arrow A, B) directions in association with the rotational driving of the screw portion 21a of the driving member 21, so that the slant member 22 is folded and unfolded. That is, the triangular connecting members 17 and 17 are connected to each other by the connecting rod 1 forming the connecting member 14.
1 is rotatably connected by connecting members 23 and 24 shown in FIGS. 9 and 10, respectively. Also, the triangular connecting members 17,17
A connecting member 16 for connecting the connecting member 14 on the other side of the
And a connecting member for connecting the connecting rod 11 of the connecting member 14 on one side of the triangular connecting members 17, 17, a slanting member 22 is installed, and one end of this slanting member 22 is rotatable with respect to the connecting member 16. (See FIG. 6). The other end of the slant member 22 is rotatably connected to a connecting member 25, and the connecting member 25 is screwed to the screw portion 21a of the driving member 21 so as to be screw-adjustable (see FIG. 9). . As a result, in the triangular prism truss element 10a, when the drive motor (not shown) of the drive member 21 is drive-controlled and the screw portion 21a thereof is rotationally driven, the coupling member 25 that supports one end of the diagonal member 22 is driven. It is moved along the screw portion 21a of the member 21 in the axial (arrow A, B) direction. As a result, the constituent members forming the triangular prism truss element 10 are rotated about the driving member 21 and are folded and expanded as shown in FIGS. 11 (a) to 11 (d).

Further, in each of the above-mentioned embodiments, the screw member 21a is provided as the driving means on the driving member 21, and the structure is configured such that the screw member 21a is folded and deployed in conjunction with the rotational driving of the screw portion 21a. It is also possible to rotate the components of the triangular prism truss elements 10 and 10a around the driving member and fold and deploy them by utilizing the biasing force such as.

Further, in the above embodiment, the case where the deployed position of the triangular prism truss element 10 is configured to be set by controlling the rotational position of the screw portion of the drive member has been described as a representative, but the present invention is not limited to this, and the triangular prism truss is not limited thereto. The same can be done by appropriately setting the length dimensions of the connecting rods, diagonal members, and the like that form the element 10.

Further, in the above embodiment, the case where it is configured as a support structure for a parabolic antenna constructed in outer space has been described, but the present invention is not limited to this, and as a support structure such as a deployed roof of an indoor stadium or the like built on the ground. Is also applicable.

Therefore, it goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

[Effects of the Invention] As described in detail above, according to the present invention, a truss structure is provided, which ensures high-precision operation control, simplifies the configuration, and promotes weight reduction. Can be provided.

[Brief description of drawings]

FIG. 1 is a view showing a triangular prism truss element constituting a truss structure body according to an embodiment of the present invention, and FIG. 2 is a structure showing the triangular prism truss element shown in FIG. FIG. 7A is a plan view, FIG. 7B is a side view, FIGS. 3 to 6 are diagrams showing details of the coupling portion of FIG. 1, and FIG. 7 is an operation of FIG. Figure showing the state, Figure 7 thru
FIG. 11 is a view shown for explaining another embodiment of the present invention. 10,10a …… Triangular prism truss element, 11,18 …… Connecting rod, 12,1
3,15,16,, 20,23,24,25 …… Coupling moving member, 14 …… Coupling member, 17 …… Triangular connecting member, 19 …… Bending member, 19a …… Bending part, 21 …… Drive member, 21a ... Screw part, 22 ... Slanting member.

Claims (2)

[Claims] 1. A triangular connecting member having two connecting rods rotatably connected and combined in a triangular shape, and two connecting members rotatably connecting each connecting portion are arranged so as to face each other. A truss structure constructed by combining a plurality of triangular prism truss elements in which a connecting rod is installed between the both ends of the connecting rod so that the connecting rods are rotatably coupled to a coupling portion. A bending member which is provided between the connecting portions of the connecting rods of the connecting members, and a bending portion is provided in an intermediate portion of which end portions are rotatably connected to the connecting portion; It is installed between the connecting portions of the members, one end of which is rotatably connected to the connecting portion of the connecting rod of the connecting member on one side of the triangular connecting member, and the other end of which is the other side of the triangular engaging member. A drive member having a rotatable coupling portion engaged movably in the axial direction; Is rotatably connected to the connecting portion of the connecting rod of the connecting member on one side of the triangular connecting member, and the other end is rotatably connected to the connecting portion of the connecting member on the other side of the triangular connecting member. A diagonal member and a diagonal rod that constitutes the triangular prism truss element by axially controlling the movement of the coupling portion of the coupling rod of the coupling member on the other side of the triangular coupling member engaged with the drive member. And a drive means for urging and rotating the triangular prism truss element so as to fold and deploy the triangular prism truss element. 2. A triangular connecting member having two connecting rods rotatably connected together in a triangular shape, and two connecting members rotatably connecting each connecting portion are arranged so as to face each other. A truss structure constructed by combining a plurality of triangular prism truss elements in which a connecting rod is installed between the both ends of the connecting rod so that the connecting rods are rotatably coupled to a coupling portion. A bending member which is provided between the connecting portions of the connecting rods of the connecting members, and a bending portion is provided in an intermediate portion of which end portions are rotatably connected to the connecting portion; It is installed between the connecting portions of the members, one end of which is rotatably connected to the connecting portion of the connecting rod of the connecting member on one side of the triangular connecting member, and the other end of which is on the other side of the triangular engaging member. A drive unit rotatably connected to the connecting portion of the connecting rod of the connecting member. When one end is engaged to be movable in the axial direction to the drive member,
An oblique member whose other side is rotatably coupled to a coupling portion of the connecting member on the other side of the triangular coupling member, and a rotatable coupling portion of the other side of the triangular coupling member engaged with the driving member. A truss comprising a connecting rod, a bending member, and a diagonal member that constitute the triangular prism truss element by movably urging the triangular prism truss element to fold and deploy the triangular prism truss element. Structure.