JPH02136396A - Deployment truss antenna - Google Patents

Abstract

PURPOSE:To easily obtain a deployment structure with no backlash by providing wires stretched among apexes constituting N-pyramids and wires connecting stoppers on mandrels and center sections of the above wires and stretched when a deployment truss antenna is deployed. CONSTITUTION:Connecting pieces 3a and 3b on the upper side and the lower side are connected to a slant member 2 with pins, and connecting pieces 3c are provided at the other end of ribs serving as the free end of a deployment truss antenna. A metal net 10 serving as a mirror surface is supported via net fixing tools 11, and the mirror surface shape when the antenna is deployed can be adjusted by a net adjusting nut 12 screwed at the lower end section of a mandrel 13. A main slide hinge 14 is freely coupled with the mandrel 13, multiple ribs 15 are radially deployable supported on it, the other ends of the ribs 15 are fixed to the connecting pieces 3c. Wires 16a are stretched among the connecting pieces 3a, among 3b, among 3c, and among connecting pieces 3a and 3c, and wires 16b are stretched among a stopper 19 and center sections of the wires 16a.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a deployable truss antenna that is highly storable and lightweight.

[Conventional technology]

In recent years, the performance and reliability of space shuttles, Ariane rockets, etc. have improved, and the use of space has become economically advantageous. In particular, large deployable antennas are indispensable for communication in mobile bodies such as ships and vehicles, and deployable truss structures for constructing these antennas have been actively developed. This is because it is believed that the deployable structure method is the most economical way to construct huge antennas in space.

FIG. 13 is a diagram showing a conventional example of the above-mentioned deployable truss antenna. (2) is a diagonal member that supports the triangular lattice on the upper and lower surfaces; (3)
is a connector for pin-coupling the bent member (11) and the diagonal member (2), Q (l is a conductive metal net that becomes the score of the deployable truss antenna, α11 is a connector that connects the bent member (11) and the diagonal member (2), This is a net fixture that supports and fixes the shape until it is deployed.

Fig. 14 is an enlarged view of part A surrounded by the broken line circle in Fig. 13. (4) is a web provided around the connector (3), and the bends are connected to other parts (1) and diagonal. The member (2) is pin-coupled to the connector (3).

Fig. 15 is an enlarged view of part B surrounded by the broken line circle in Fig. 13, and the bent part is a diagram showing the details of the central bent part of 9 members (11). A rotatable sheep lever (6) consisting of two plates υ is attached to the base of one of the hinge levers (5), and the bends are attached to the other members (11'i) in the direction in which the hinge lever unfolds. (5) is a spiral spring that rotates, (7) is the above-mentioned bent 9
member (11 binding pin that connects the binding lever (5),
(7a) and (7b) are pins that connect the hinge lever (5) with 9 bent parts (Ili);
This is a connecting pin that connects the members (1) together at the center.

The above structure is made up of a plurality of tetrahedrons made up of three bent members (1), three diagonal members (2), and three connectors (3). Because of this, it is also called a tetrahedral truss antenna. FIG. 16 is a diagram showing the deployable truss antenna in the middle of deployment.

Next, the operation will be explained. Initially, the above-mentioned antenna was restrained by a holding cable (not shown) in its retracted form, but upon command from the ground, it became movable until the holding cable was severed by a detonator or the like.

Begin to develop the spring force of the spiral spring (6).

To unfold, rotate the hinge lever (5) with the spring force of the spiral spring (6), and the 9 parts (1) are connected to the connecting pin (
7C) Extend while rotating. Due to the extension of the other member (1), the connectors (3) on the upper and lower surfaces expand radially, and 9 expansion progresses. As the connector (3) expands, the net αG supported by the net fixture συ on the upper flIU connector (3) also begins to expand. When the bend occurs and the member (1) extends linearly, the hinge lever (5)
) and the rotational torque generated by the spiral spring force and the contact surface pressure on the nine bent surfaces of the bent member (1) match approximately 9, and the bent other member fil stops moving.

At the same time, the expansion of the net aα also stops due to the bending and the stop of the expansion movement of other members (11).This is the expanded shape, and the structure is connected only by the triangular lattice.

A triangular lattice is basically a rigid and stable structure, and conventionally this type of structure was considered to be a very rigid structure and suitable for a deployable antenna structure.

[Problem to be solved by the invention]

In the conventional structure, the connection points of each member are not actually concentrated at one point, so it is a soft structure that cannot even maintain its own shape. In other words, the triangular lattice is rigid only when each member is connected at one VC point as shown in FIG.

In the conventional structure, this triangular lattice has many hinge connection points as shown in FIG. 17, which not only does not provide the flexibility but also results in an unstable link structure. In FIGS. 17 and 18, (8) is the basic member constituting the triangular lattice, and (9) is the basic member (8).
(31 is a connector that connects the base member (8) to the pin joint (9).

As explained above, conventional deployable truss antennas that use bent and other members have a fundamentally unstable structure, and therefore have the fatal problem of not being able to provide the required rigidity as a deployable antenna.

The present invention was made to solve the above-mentioned problems, and provides a deployable truss antenna that is structurally stable and highly rigid in its deployed shape.

[Means to solve the problem]

The deployable truss antenna of the first invention according to the present invention includes a mandrel having a connector having a pin joint portion at one end, a stopper at the other end, and a screw thread, and a mandrel that slides on the mandrel when deployed. , a main slide hinge that finally hits the stopper and comes to rest, N (N is 4, 6) ribs that are pin-coupled at one end to the main slide hinge and extend radially, and one end of the mandrel and the main slide. a synchronous slide hinge that slides between the hinges; N synchronous beams each having one end radially pin-coupled to the synchronous slide hinge and the other end pin-coupled to each of the N ribs; and the main slide hinge. and a coil spring provided between the synchronous slide hinges, and the above-mentioned mandrels are arranged so that adjacent ones are in opposite directions, and the ribs except for the rib that becomes the free end of the deployable truss antenna are mutually connected. A plurality of frames formed by connecting connectors on mandrels in opposite directions, and connecting connectors on mandrels facing oppositely to each other with diagonal members, and between connectors on mandrels in which the mandrels are oriented in the same direction. , between the other ends of the ribs that serve as free ends of the deployable truss antenna, and between the other ends of the ribs that serve as the free ends of the deployable truss antenna and the connector, and when the deployable truss antenna is deployed, each The wire stretched between them, the stopper on the mandrel, and the central part of the wire are connected, and the wire stretched between them when the deployable truss antenna is deployed has conductivity and becomes a mirror surface part of the deployable truss antenna. A metal net, a jacket adjustment nut attached to the threaded portion at the lower end of the mandrel, and a net fixture attached between the connector and the net are attached.

Further, the deployable truss antenna of the second invention according to the present invention includes elastic binding wires for bundling the wires constituting the lower surface side for each triangle made between the connectors in the N-gon on the lower surface side. It is equipped with

Furthermore, the deployable truss antenna of the third invention according to the present invention is the same as that of the first invention, and further includes an elastic binding wire for bundling the wires forming the lower surface side for each triangle formed between the connectors in the N-gon on the lower surface side. A wire binding support rod is provided at the lower center of a rib perpendicular to the base of the triangle formed by the connector, and has one end connected to an elastic binding wire and the other end attached to a stopper.

[Effect]

In the first invention of this invention, N (N is 4°6)
The wires stretched between the vertices that make up the pyramid create compressive force on the ribs, achieving a force equilibrium state, so the looseness of the pin-connected parts disappears and the N-pyramid, which is the basic module, is stable. Easy structure and high rigidity
Furthermore, since each of the N pyramids expands synchronously,
Increased reliability of deployment [7. Thanks again to the power of the spring! 7
Since the N angle # is expanded, the energy from lA is not needed.

In the second aspect of the present invention, since the wire in the N-gon shape on the lower side of the deployable truss antenna may get caught on a member such as a mandrel between the time of storage and the time of completion of deployment, the wire is divided into certain areas to provide elasticity. By tying them together with wires that have a certain quality,
Wobble of the wire.

It is possible to easily prevent bulging and eliminate damage to the two members.

In the third aspect of the present invention, since the wire inside the N-gon on the lower side of the deployable truss antenna may get caught on members such as the mandrel between the time of storage and the completion of deployment, the wire is divided into certain areas. The wires are bundled with elastic binding wires and supported by a binding wire support rod that has one end connected to the elastic binding wire and the other end connected to a stopper, preventing the wires and elastic binding wires from floating even in the weightless state of outer space. It is also easier to prevent damage to the

〔Example〕

FIG. 1 is a diagram showing a hexagonal pyramidal living room truss antenna in an expanded form, showing a first embodiment of the present invention.

(2) is a diagonal member, (3a) and (3b) are connectors having pin joint parts, and (3c) is a connector provided at the other end of the rib that becomes the free end of the deployable truss antenna. ) The connector (6a) on the upper surface side and the connector (3b) (3(') on the lower surface side are connected by k pin coupling. α1 is a conductive metal that becomes the mirror surface of the above-mentioned deployable truss antenna. net, (Ill is a net fixing device that supports and fixes the shape of the net αG from when it is stored to when it is deployed.
a2 is a net adjustment nut that adjusts the mirror surface shape when the deployable truss antenna is deployed, α3 is a mandrel with a net adjustment nut aX5 and a connector (3) attached to the bottom tip, and the adjacent mandrels 0 are aligned with each other. It is placed in the opposite direction. α9 is a raw slide hinge that slides on the mandrel α3, and α9 is a rib whose one end is radially pin-coupled to the main slide hinge (141) and can be expanded in a direction perpendicular to the axial direction of the mandrel.

The direction opposite to the connector (3a) on the mandrel (131) is 9
゜ Connector (3b) mounted on the adjacent opposite shaft fi3 K pin connection. Further, the rib serving as the free end of the deployable truss antenna is connected to a connector (6C).

(16a) is between the connectors (3a) attached to the tip of the mandrel aJ + (6b) between each other, between the connectors (6C) disposed at the free end of the deployable truss antenna, and Peripheral connector (6a) mounted on mandrel
and a connector (3C) disposed at the free end of the deployable truss antenna, and is set to be pulled when the deployable truss antenna is deployed.

Further, (16b) is a wire attached between the stopper 01 shown in FIG. 2 and the central part of the wire (16a), and is set to be pulled when the deployable truss antenna is deployed.

[71 is a synchronous slide hinge that slides on the shaft between the connector (3) and the main slide hinge α4, 0g has one end pin-coupled to the synchronous slide hinge aη, and the other end pin-coupled to the lip αte. Showing synchronous beams.

Figure 2 is an enlarged view of part C in Figure 1, and I19 is a stopper that determines the bottom dead center of the main slide hinge α when deployed;
■ is a coil spring that provides the driving force for deploying the deployable truss structure of this invention, and θ is the angle between the shaft U and the rib (1!il), which is set to be around 90° when deployed. .

FIG. 3 is a diagram showing the deployable truss antenna according to the first aspect of the present invention in the middle of deployment.

The deployment operation of the deployable truss antenna of the first aspect of the present invention configured as described above will be described below. When the deployable truss antenna of the present invention is stored, one end is pin-coupled to the connector 2, for example (3a) on the mandrel (13), the main slide hinge α4 on the mandrel aJ, and the synchronous slide hinge αD. Another connector 2 connected to the end.For example, ('5b) A triangle with three vertices is collapsed,
The expansion is performed by expanding the gap between the main slide hinge α and the synchronized slide hinge σ by the spring force of the coil spring, with the angle θ between the rib and the shaft α3 shown in FIG. 2 being zero. , when the distance between the main slide hinge I and the synchronous slide hinge increases, the distance between the connector (3a) on the shaft aJ and the connector (3b) on the above side becomes a constant length by the diagonal member (2). is maintained, and the connector on the above side (3
The distance between b) and the main slide hinge α knob is also the rib (L9
Since the triangle consisting of the three vertices expands, the angle θ formed between the lip holder 9 and the shaft αj increases, and one end is connected to the connector (3b) on the side and the main slide hinge α4. The distance between yet another connector 2, for example (5C) provided at the other end of another rib α9 pin-coupled also increases. When the main slide hinge α is pulled close to the stopper 0, the upper side connectors (6a) are moved between each other, and the lower side connectors (3a) and (3b) are moved between each other.

In addition, the wire (16a) between the connector (3a) at the upper free end and the connector (3C) at the lower free end, and the wire (16+) between the stopper 9 and the wire (16a) are tensioned. It will be hung. The above wire (16a)
.

(16b) continues to be stretched until the main slide hinge α4 hits the stopper σ9. Strung wire (16
In a) and (16'b), since the connector (3) is pressed against the lip housing 9 side, play in the pin joint part is eliminated, and the deployable truss antenna becomes a highly rigid antenna.

FIG. 4 is a diagram showing a hexagonal pyramidal deployable truss antenna in a partially deployed shape according to an embodiment of the second invention of the present invention,
(2υ is the two peripheral connectors (6a
) and the stopper IJ installed on the center saJ, 9
The wire stretched inside the rectangle made by (
16a), (16b) fc is an elastic binding wire that is bound for each of the above-mentioned squares.

FIG. 5 is an enlarged view of the fourth drawing section, and FIG. 6 is an enlarged view of section C' in FIG. 4.

The operation of the deployable truss antenna according to the second aspect of the present invention configured as described above will be explained below. When the deployable truss antenna of the present invention is stored, there are two connectors on the mandrel aj, for example (6a), and two connectors, for example (3b), which are connected to the other end of the pin-connected rib section on the mandrel α3. ) are the three vertices, the triangle is collapsed, and the angle θ between the rib aS and the shaft σ3 shown in Fig. 6 is zero, and the connector (6C) which is the free end on the bottom side of the deployable truss antenna Two peripheral connectors (3a) adjacent to the connector (3C) above
And the stopper a installed on the shinbo 3! Wires (16a) and (L6'b) are placed approximately in the center of the rectangle made by J.
) are bound together by an elastic binding wire C11.

4. When the distance between the main slide hinge (141) and the synchronous slide hinge α force increases, the connection on the axle 0 increases. Child(
The distance between the diagonal member (2) and the other connector (3b) is
) is maintained at a constant length, and the above-mentioned another connector (3b)
The distance between the main slide hinge (14) and the main slide hinge (14) is also maintained at the length of the rib σ9, so the triangle formed by the three vertices expands, and the angle θ formed between the rib 9 and the axle α3 increases. Connector (6b) and the above main slide hinge α4
Another rib (151) is connected with a pin to one end of the connector (2). The net αω attached by the fixture t111 develops in the same way.Due to the increase in the angle θ, the distance between the stopper σ9 and each connector (3) increases.

Connectors (3) Wires (16
a) (16b) gains tension and pushes the elastic binding, IJc) υ, and forces it to slide downward. When the main slide hinge (141) comes close to the stopper σ9, the upper side connectors (3a), the lower side connectors (3a), (3b
) wires (1
6a) and the wire (16b) between the stopper rod and the wire (16a) is stretched. Each of the wires (16a) and (16) on the lower surface side, which have obtained tension due to the unfolding operation, are shown in the direction of the connector (3C) which is the free end of the deployable truss antenna, in the direction of another connector (6C), and in the direction of the peripheral connector ( 6a) A force trying to stretch in the direction is applied, but the elastic binding wire I21
1, there is no deviation due to the above-mentioned extension force, and the main slide hinge I maintains its position approximately in the center of the rectangle formed by the connector (3) and the stopper 9 until just before it hits the stopper 9. Therefore, each wire αe does not come close to the shaft ti3, thereby preventing damage to the member. The wires (16a) and (16b) continue to be stretched until the main slide hinge 0 abuts against the stopper 9, and similarly, the net α0, which forms the mirror surface on the upper side, continues to expand. The stretched wires (16a) and (16b) press the connector (3) toward the rib housing 9 side, so there is no looseness at the pin joint,
The unfolded l/rath antenna has high rigidity, and its members are not damaged by the wire tLe during storage or during deployment.

For example, as shown in FIG. 12 between the time of storage and the completion of deployment, the wire Qfl inside the N-gon on the bottom side of the deployment truss antenna may get caught on a member such as the mandrel 03.
By dividing the wires (6) into certain areas and bundling them with elastic wires as in this invention, it is possible to easily prevent the wires from wobbling and bulging, thereby eliminating damage to the members.

Note that the two elastic binding wires C11 move downward as the antenna is deployed as the wire αe is expanded, and are separated after the antenna is deployed.

FIG. 7 is a diagram showing the unfolded shape of the deployable truss antenna according to the third aspect of the present invention, and the structures and configurations other than @ in FIG. 2 are the same as the deployable truss antenna according to the second aspect of the invention. ■ is a binding wire support rod that eliminates the wobbling of the elastic binding wire CD that binds the wire 〇〇 from the time of storage to the middle of expansion.

FIG. 8 is an enlarged view of part E in FIG.
5a, ), (3c) and the stopper 9 are set so that the tip of the wire support rod ■ is located approximately at the bottom of the center of the rectangle. FIG. 9 is a diagram showing the deployable truss antenna of the third aspect of the present invention in the middle of deployment, and FIG. 10 is an enlarged view of the lower part of FIG. 1.

FIG. 11 is an enlarged view of part 0 of FIG. 10.

The operation of the deployable truss antenna according to the third aspect of the present invention configured as described above will be explained below. When the deployable truss antenna of this invention is stored, the connector 2 on the mandrel U, for example (3a), and the pin-coupled rib α on the mandrel α3.
Another connector 2 connected to the other end of 51, for example (3b)
'i If there are three vertices, the triangle will be collapsed. 7th
The angle θ between the rib α9 and the shaft αj shown in the figure is zero, and the connector (
6C) and the above connector (3c) [two adjacent peripheral connectors (3a) and a stopper a9 mounted on the mandrel 03
Wire (16a), (
16b) are bound by elastic binding, 1) Hp.

A binding wire support rod (22
r, T are arranged approximately at the lower center of the rectangle formed by the connector (3) and the stopper un. Deployment is performed by rotating the main slide and pushing out the synchronized slide hinge anti:ij'& by the force of the coil spring (2). When the distance between the main slide hinge a41 and the synchronous slide hinge α9 increases, the distance between the connector (3a) on the mandrel (1g) and the other connector (3b) becomes constant with the diagonal member (2) K. °C is maintained, and the distance between the upper ηC another connector (60) and the main slide hinge I is also increased by α9
Since it is held at the length of , the triangle formed by the three vertices expands, the angle θ formed by the rib (15' and the axis 0) increases, and the another connector (5b) 'f Uero C main slide A hinge (L41 VC is pin-coupled to one end and another connector 2 is attached to the other end of the VC, for example (6C
) also increases.

Along with this, a net fixing device aυ is placed on the top side connector (3).
The net αO attached with will be expanded in the same way. Due to the increase in the angle θ, the distance between the stopper 09 and each connector (3) increases, and the distance between the connectors (3) increases, causing the wires (16a) and (16b) to gain tension and become elastic binding wires. The CI is pushed out and pushed downwards.

During the above operation, the binding wire support rod (221 is 1 elastic binding wire Q)
Since the position of wire 11 is fixed, it prevents the wires (16a) and (16b) from wobbling.

When the main slide hinge α comes close to the stopper σ■, the upper surface side connectors (6a) and the lower surface side connectors (3
a), (3b) the wire (16a) between each other and the connector (6a) on the upper free end and the connector (6C) on the lower free end, and the wire (16a) between the stopper α9 and the wire (
16a) The wires (j6b) between each other are stretched. Each wire (16
a) and (16b) are the free ends of the deployable truss antenna, in which a force is applied to the connector (3 direction) and another connector (3 direction) and to the peripheral connector (3a), but 1 Since they are bundled with the elastic binding wire 12D, there is no deviation due to the above-mentioned stretching force, and the main slide hinge α41 maintains its position approximately in the center of the above-mentioned rectangle formed by the connector (3) and the stopper housing 9 until just before it hits the stopper α9. .For this reason, each wire (161) does not come close to the axis α to prevent damage to the member.The above wire (16a).

(161)), the main slide hinge housing 4 is the stopper 19
The net αa, which becomes the mirror surface on the upper side, also continues to expand.

The stretched wires (16a) and (16b) are connected to connectors (
31 is pressed against the rib α9 side, there is no play in the pin joint part, the deployable truss antenna has high rigidity, the wire ae prevents damage to the member due to wobbling during storage or deployment in the weightless state of space, and The antenna also prevents the elastic binding wire from separating. For example, from the time of storage until the completion of deployment.

As shown in Fig. 12, the wire αυ in the N-gon on the lower side of the deployable truss antenna may get caught on the shaft Q3 and other members, so in this invention, the wire (IG) is divided into a certain area and elastically bound NQυ. Bundle and tie one end with elastic binding wire t2
1), and the other end is connected to the stopper a9, which is supported by a wire support rod (to), which prevents the wire ae and the elastic wire t21) from floating even in the weightless state of outer space, and prevents damage to the members. This makes it easy to prevent the elastic binding wire from separating into outer space after deployment.

〔Effect of the invention〕

As described above, according to the first aspect of the present invention, the wire stretched between the vertices constituting the N-pyramid, the stopper on the mandrel and the central part of the wire are connected, and when the deployable truss antenna is deployed, By providing wires that are stretched between them, a structure with no backlash can be achieved, which has the effect of easily achieving high rigidity.

According to the second invention of the present invention, in the deployable truss antenna of the first invention, the N-pyramidal stopper on the lower surface side, the peripheral connector, and the connector are connected by using an elastic connecting wire that has elasticity when stored. By bundling the wires stretched within the created rectangle, it is easy to prevent the wires from getting stuck on the members from the time of storage to the time of deployment, and there is an effect that high stability can be obtained.

Further, according to the third invention of the present invention, a binding wire support rod extending from the stopper is attached to the elastic binding wire that bundles the wires in the deployable truss antenna of the second invention in a zero gravity state in outer space.

It is easy to eliminate floating of the elastic binding wire and prevent the wire from getting caught on the member, and there is an effect that high rigidity can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a conceptual diagram of a deployable truss antenna showing an embodiment of the first invention of the present invention, Fig. 2 is a diagram showing a member coupling part in an embodiment of the first invention of the invention, and Fig. 3 Figure 4 is a diagram showing the shape of the first embodiment of the present invention in the middle of expansion, Figure 4 is a diagram of the shape of the second embodiment of the invention in the middle of expansion, and Figure 5 is the figure of the invention in the middle of expansion. FIG. 6 is a diagram showing a mounting part in an embodiment of the second invention, and FIG. 6 is a diagram showing a member coupling part in an embodiment of the second invention. FIG. 7 is a conceptual diagram of a deployable truss antenna showing an embodiment of the third invention of the present invention, FIG. FIG. 10 is a diagram showing the mounting part in an embodiment of the third invention of this invention, and FIG. An enlarged view of an embodiment of the third invention in VC, the first embodiment
Figure 2 is a diagram showing the previous installation in an embodiment of the third aspect of the present invention, Figure 13 is a diagram of the conventional example in its unfolded shape;
Fig. 14 is a diagram showing a diagonal member joining part in a conventional example, Fig. 15 is a diagram showing a mechanism of a triangular lattice bending member in a conventional example, and Fig. 16 is a diagram showing a shape in the middle of expansion in a conventional example. , 1st
Figure 7 is a diagram of the physical model of the triangular lattice that was previously considered.
The figure shows an actual physical model diagram of a triangular lattice in a conventional example. In the figure, (1) is a bent member, and (2) is a diagonal member. (3) is a connector, (4) is a web, (5) is a hinge lever, (6) is a spiral spring, (7) is a coupling pin, (8) is a basic member, (9) is a pin joint, α[B [Net,
fLl) is a net fixture. Housing 2 is the net adjustment nut, 1) 3 is the stem, 0 is the main slide hinge, (L9 is the rib, Oe is the wire, αD
is a synchronous slide hinge, 0a is a synchronous beam, α9 is a stopper 2 (support) is a coil spring, QD is an elastic binding wire, and ■ is a binding wire support rod. Note that in the two figures, the same reference numerals indicate the same or corresponding parts.

Claims (3)

[Claims] (1) A mandrel to which a connector having a pin joint is connected at one end, a stopper at the other end, and a screw thread, a main slide hinge that slides on the mandrel, and one end of which is the main slide hinge. N (N is 4, 6) ribs that are radially pin-coupled and expandable in directions perpendicular to the axial direction of the mandrel, and a synchronizer that slides between one end of the mandrel and the main slide hinge. a slide hinge, one end of which is radially pin-coupled to the synchronous slide hinge, and the other end of which is pin-coupled to each of the N ribs; provided between the main slide hinge and the synchronous slide hinge; Equipped with a coil spring,
The above-mentioned mandrels are arranged so that adjacent ones are turned in opposite directions, and the ribs except for the rib that becomes the free end of the deployable truss antenna are connected by connectors of the mandrels that are turned in opposite directions, and the ribs are arranged in opposite directions. A plurality of frames formed by connecting connectors on the mandrels with diagonal members, the connectors on the mandrels having the same orientation, and the other ends of the ribs that become the free ends of the deployable truss antenna. and the other end of the rib, which is the free end of the deployable truss antenna, and the connector,
When the deployable truss antenna is deployed, a wire that is stretched between the respective wires; a wire that connects the stopper on the mandrel and the central portion of the wire, and that is stretched between the wires when the deployable truss antenna is deployed; A conductive metal net that becomes the mirror surface part of the deployable truss antenna, a net adjustment nut attached to the threaded portion of the mandrel, and a net fixture attached between the connector and the net. A deployable truss antenna characterized by comprising: (2) A mandrel to which a connector having a pin joint is connected at one end, a stopper at the other end, and a screw thread, a main slide hinge that slides on the mandrel, and one end of which is the main slide hinge. N (N is 4, 6) ribs that are radially pin-coupled and expandable in directions perpendicular to the axial direction of the mandrel, and a synchronizer that slides between one end of the mandrel and the main slide hinge. a slide hinge, one end of which is radially pin-coupled to the synchronous slide hinge, and the other end of which is pin-coupled to each of the N ribs; provided between the main slide hinge and the synchronous slide hinge; Equipped with a coil spring,
The above-mentioned mandrels are arranged so that adjacent ones are in opposite directions, and the ribs other than the rib that becomes the free end of the deployable truss antenna are connected by connectors of the mandrels that are oriented in opposite directions, and the ribs are also oriented in opposite directions. A plurality of frames formed by connecting connectors on the mandrels with diagonal members, between the connectors on the mandrels in which the orientation of the mandrels is the same, and between the other ends of the ribs that are the free ends of the deployable truss antenna, and a wire that connects the other end of the rib, which is the free end of the deployable truss antenna, and the connectors, and is stretched between the connectors when the deployable truss antenna is deployed, and a stopper on the mandrel and the wire that connects the connectors. The central part of the wire is connected, and the wire is stretched between the wires when the deployable truss antenna is deployed, the conductive metal net that becomes the mirror surface of the deployable truss antenna, and the wire is attached to the threaded part of the mandrel. The net adjustment nut attached to the net, the net fixture installed between the connector and the net, and the elasticity that bundles the wires forming the lower side into triangles formed between the connectors in the N-gon on the lower side. A deployable truss antenna characterized by comprising a binding wire. (3) A mandrel to which a connector having a pin joint portion is connected at one end, a stopper at the other end, and a screw thread, a main slide hinge that slides on the mandrel, and one end of which is the main slide hinge. N (N is 4, 6) ribs that are radially pin-coupled and expandable in directions perpendicular to the axial direction of the mandrel, and a synchronizer that slides between one end of the mandrel and the main slide hinge. a slide hinge, one end of which is radially pin-coupled to the synchronous slide hinge, and the other end of which is pin-coupled to each of the N ribs; provided between the main slide hinge and the synchronous slide hinge; Equipped with a coil spring,
The above-mentioned mandrels are arranged so that adjacent ones are in opposite directions, and the ribs other than the rib that becomes the free end of the deployable truss antenna are connected by connectors of the mandrels that are oriented in opposite directions, and the ribs are also oriented in opposite directions. A plurality of frames formed by connecting connectors on the mandrels with diagonal members, between the connectors on the mandrels in which the orientation of the mandrels is the same, and between the other ends of the ribs that are the free ends of the deployable truss antenna, and a wire that connects the other end of the rib, which is the free end of the deployable truss antenna, and the connectors, and is stretched between the connectors when the deployable truss antenna is deployed, and a stopper on the mandrel and the wire that connects the connectors. The central part of the wire is connected, and the wire is stretched between the wires when the deployable truss antenna is deployed, the conductive metal net that becomes the mirror surface of the deployable truss antenna, and the wire is attached to the threaded part of the mandrel. The net adjustment nut attached to the net, the net fixture installed between the connector and the net, and the elasticity that bundles the wires forming the lower side into triangles formed between the connectors in the N-gon on the lower side. It is characterized by comprising a binding wire and a binding wire support rod provided at the lower center of a rib perpendicular to the base of the triangle formed by the connector, one end of which is connected to the elastic binding wire, and the other end is attached to a stopper. Deployable truss antenna.