JP2642591B2 - Deployable antenna reflector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deployable antenna reflector suitable for receiving radio waves from, for example, a broadcasting satellite.

[0002]

Recently, as this type of deployable antenna reflector, form the shape of the umbrella mechanism rib member is bonded foldably expansion is combined mirror shape, on the rib material of the umbrella mechanism On the other hand, there is one in which a flexible conductive film is stretched. In this deployable antenna reflector, the flexible conductive film is folded and extended in conjunction with the folding and deployment of the umbrella mechanism, and in the deployed state, the flexible conductive film is extended to form a mirror surface. In a folded state, it is folded and housed in a rod shape together with the rib material so as to be easily carried.

However, in the above-mentioned antenna reflector, if the diameter of the mirror surface is increased, the folded shape becomes longer and the strength must be increased, and the weight becomes heavy. if you did this,
There is a problem that it is difficult to increase the diameter. According to this, for example, there is a problem that it is difficult to apply to a mirror surface having a diameter of about 3 m to 10 m used in a television station or the like.

[0004]

As described above, the conventional deployable antenna reflector has a problem that it is difficult to increase the aperture. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a deployable antenna reflector which has a simple configuration, can promote a large aperture, and can promote a light weight. And

[0005]

SUMMARY OF THE INVENTION The present invention relates to a frame.
Combination of members in at least a triangular truss structure
Multiple trusses with each joint foldable and unfoldable
Rib and one end of the truss ribs with respect to the center rod
The center rod as one side and radially
When the truss structure of the skeleton structure and the truss ribs of the skeleton structure are unfolded,
And position regulating means for regulating the position in the release morphism shape, said plurality of tiger
Rotate one end of each slab in synchronization with the center rod direction.
Synchronous deployment means for folding and deploying the skeleton structure;
In conjunction with the folding and unfolding operation of the synchronous unfolding means, the above
Number of truss ribs at one end with respect to the center rod
And rotate the truss ribs in the opposite direction
A synchronous means for opening, a flexible conductive film for forming a mirror surface on one surface of the frame structure, the flexible conductive film being folded and extended in conjunction with the folding and unfolding of the frame structure; A deployable antenna reflector comprises a membrane supporting means for folding and supporting the membrane on one surface of the frame structure so as to be freely stretchable.

According to the above structure, the foldable and expandable frame structure uses the truss ribs, thereby realizing a lightweight and highly rigid structure and facilitating promotion of a large mirror surface. .

Further, according to the present invention, a plurality of truss ribs are provided such that each intermediate portion of the plurality of truss ribs constituting the frame structure is rotatable in a direction opposite to the one end on the center rod side with respect to the center rod direction. Is constructed so as to be folded and developed using the center rod and the intermediate portion as pivot points.

[0008] According to the above structure, the truss ribs are turned in the opposite directions to each other in the center rod and the intermediate portion and are folded and accommodated in the frame structure, so that the folded accommodation volume is reduced and the mirror surface is improved. The diameter of the shape can be increased, and the weight can be easily promoted.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a deployable antenna reflector according to one embodiment of the present invention.
In the figure, six truss ribs 11 are radially combined with one another along the center rod 12 with respect to the center rod. The truss rib 11 has a center bar 12 as one side, a frame member 11a is combined in a rectangular shape, and an extensible member 11b is provided between the vertices A and B, and each end is connected to the center bar via a joint 13. They are connected so as to be rotatable in the directions of arrows X and Y. On the other side of the truss rib 11 opposite to the center rod 12, a frame member 11a is further rotatably connected in the directions of arrows Y and X with a predetermined inclination angle corresponding to the mirror shape. A telescopic member 11b is erected at the vertex B of the frame member 11b combined with the distal end of the member 11a in a rectangular shape, and is rotatably connected to provide a substantially triangular extending portion.

The truss rib 11 has a center rod 12
Back side frame member 1 which is frame-connected in a rectangular shape as one side
1a is connected to the center rod 12 by the synchronous deployment mechanism 14
Are connected integrally through the center rod 12 and are substantially parallel to the center rod 12.
The frame members 11a is elastic member 11b, are connected via a synchronizing mechanism 15 respectively 11b, is between the distal end portion of the coupling箇Tokoroma and frame members 11a of Torasuribu 11,
A positioning wire 16 is stretched and radially positioned with respect to the center rod 12. For example, a tension spring 17 is attached to an intermediate portion of the wire 16 to set a desired strength.

[0011] Between multiple bets Rasuribu 11, mirror mounting wire 18 is tensioning in a substantially triangular shape (see FIGS. 1 and 2), Torasuribu 1 of the mirror side including the wire 18
A support member 19 called a stud is provided on 1, and a flexible conductive film 20 (see FIG. 1B) that forms a mirror surface such as a conductive mesh is stretched on the support member 19. .
This support member 19 is, for example, as shown in FIG.
9a is formed, and the mounting screw 2 is inserted into the screw hole 19a.
1 is screwed across the flexible conductive film 20. Thereby, the movable conductive film 20 is stretched on the frame structure 10.

In the above configuration, the frame structural member 10 is
When the lock mechanism (not shown) is released in the folded and housed state as shown in FIG.
However, the one side of the truss rib 11 is moved and biased by the spring force. Then, the truss rib 11 is rotated in synchronization with the skeleton member 11a on one side thereof in the arrow X direction with the center rod 12 as a fulcrum (see FIG. 4). At the same time, truss rib 1
1 shows that the skeleton member 11a and the extended skeleton member 11
a is rotated and unfolded in synchronization with the center bar in the arrow Y direction. Then, as shown in FIG. 1, the flexible conductive film 20 stretched on the support member 19 of the skeleton structure 10 is spread in a mirror surface shape to form a mirror surface in a state where the truss ribs 11 have been developed. .

In the above-described deployed state, the frame structure 10 has a truss rib 11 on one side of the synchronous deployment mechanism 1.
4 is urged to move against the spring force of the truss rib 1
One side is rotated in synchronization with the arrow Y direction (see FIG. 4). At the same time, the truss rib 11 is folded and accommodated by the extension mechanism 11b being extended and urged by the synchronization mechanism 15, whereby the extended skeleton member 11a is rotated in synchronization with the arrow X direction. When the truss ribs 11 are sequentially folded as shown in FIGS. 4 and 5, the flexible conductive film 20 stretched on the support member 19 is folded into the frame structure 10. It is stored (however, the flexible conductive film 20 is not shown in FIGS. 4 and 5 for the sake of illustration).

As described above, the deployable antenna reflector forms the frame structure 10 in which the truss ribs 11 connected to the truss are radially arranged with respect to the center rod 12, and the truss rib 11 of the frame structure 10 The flexible conductive film 20 is folded and expanded by rotating the truss rib 11 in synchronization with the center rod direction and folding and deploying the flexible conductive film 20. According to this, since the frame structure 10 is configured using the truss ribs 11, a structure having high rigidity is realized without using a reinforcing member or the like, and it is possible to easily promote weight reduction, and to achieve a mirror surface. Enlargement of the shape can be easily promoted. Also, according to this,
Since one side and the intermediate portion of the truss rib 11 of the skeleton structure 10 are rotatably combined in opposite directions with respect to the center rod 12, even when a large mirror surface is achieved, Because the folding storage (length dimension) can be miniaturized,
The simplicity of handling including the carrying can be simplified.

In the above-described embodiment, the frame member 11a is combined in a rectangular shape, and the frame member 11a is further extended on the other side, and the elastic member 11a is provided between the tip end and one end of the other side.
b is formed so as to form a substantially triangular extending portion, but the present invention is not limited to this.
May be configured by using a rectangular truss rib without extending.

In the above-described embodiment, the synchronous deployment mechanism 14 is provided for the center rod 12 and
Although it was configured to be folded and deployed using
1b is driven to expand and contract using a spring mechanism or a drive motor,
Instead of the elastic member 11b, a diagonal member may be provided, and one end of the diagonal member may be slid with respect to the vertical member, or various folding and unfolding mechanisms may be configured.

Further, in the above embodiment, the flexible conductive film 2
Although the rear side of the support member 0 is configured to be supported in a mirror-like shape using the support member 19, the present invention is not limited to this. For example, the rear side is supported by a support member having an adjustable length, and the length of the support member is measured. It is also possible to configure so that mirror surface adjustment can be performed by adjusting. In addition, the flexible conductive film 2
The rear surface of the wire 0 may be supported by a support member, and the mirror surface of the wire may be stretched and held in a substantially triangular shape on a non-radio-reflective wire. According to this, the non-radio wave reflective wire regulates wrinkles and slack on the mirror surface side of the flexible conductive film 20, so that a more precise mirror surface can be formed.

Further, in the above-described embodiment, the tension spring 17 is interposed in the middle of the positioning wire 16 stretched between the truss ribs 11. However, the present invention is not limited to this, and it is configured using only the wire 16. May be. according to this,
Although the positioning accuracy is slightly inferior, substantially the same effect can be expected.

Further, the present invention is not limited to the mirror surface configuration of the so-called offset type antenna reflecting mirror surface. For example, the center rod 12 may be protruded from the mirror surface side of the flexible conductive film 20, It is also possible to arrange a power feeding unit at the tip end of the flexible conductive film 20 so as to face the mirror surface side of the flexible conductive film 20 to form a so-called center feed type antenna reflecting mirror surface. Therefore, it is needless to say that the present invention is not limited to the above-described embodiment, and that various modifications can be made without departing from the scope of the present invention.

[0020]

As described above in detail, according to the present invention, there is provided a deployable antenna reflector having a simple structure, capable of promoting a large diameter and capable of promoting a light weight. can do.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a part of FIG. 1B viewed from the rear side;

FIG. 3 is a view shown for explaining a stretched state of the flexible conductive film of FIG. 1;

FIG. 4 is a diagram showing a state during the operation of FIG. 1;

FIG. 5 is a view showing the folded state of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Frame structure, 11 ... Truss rib, 11a ... Frame member, 11b ... Telescopic member, 12 ... Center rod, 13 ... Joint, 1
4: Synchronous deployment mechanism, 15: Synchronization mechanism, 16: Wire, 1
7 ... Tension spring, 18 ... Wire, 19 ... Support member, 19
a: screw hole, 20: flexible conductive film, 21: nut member.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Furukawa 1 Kosuka Toshiba-cho, Sachi-ku, Kawasaki-shi, Kanagawa Pref. JP-A-62-29206 (JP, A) JP-A-5-37230 (JP, A) JP-A-58-48111 (JP, U) JP-A-62-49313 (JP, U)

Claims (3)

(57) [Claims] (1)At least a triangular truss
Combined with the structure, each joint is folded and unfolded
Combined truss ribs, One end of each of the plurality of truss ribs is
Combine radially with the mandrel as one side and rotate the joint
Joined to A skeleton structure and a plurality of truss ribs of the skeleton structureIn the unfolded state
And release it against the center rodPosition regulating means for regulating the position radially
When,Align one end of each of the plurality of truss ribs in the direction of the center rod.
Synchronized to fold and unfold the frame structure
Deployment means; In conjunction with the folding and unfolding operation of the synchronous unfolding means, the above
Number of truss ribs at one end with respect to the center rod
And rotate the truss ribs in the opposite direction
A synchronization means to open;  A mirror surface is formed on one side of the frame structure.
And the foldable extension of the frame structure
A flexible conductive film to be provided, and folding the flexible conductive film over one surface of the frame structure.
Characterized by comprising a membrane supporting means for supporting in a stretchable manner.
Deployable antenna reflector. 2. The method according to claim 1, wherein said film supporting means is a back surface of a flexible conductive film.
And a substantially triangular extension on the mirror side.
Non-radio-reflective wire for positioning
The deployable antenna reflector according to claim 1, wherein: 3. The skeleton structure according to claim 1, wherein said skeleton corresponds to a center rod.
A power supply unit is provided on the mirror side of the flexible conductive film.
The deployable antenna reflector according to claim 1 .