JPH07226620A - Expandable antenna reflection mirror - Google Patents

Abstract

PURPOSE:To obtain an expandable antenna reflection mirror for space being surely expandable without generating entanglement in a cable network for holding a mirror surface in orbit. CONSTITUTION:Only an expansion rib 4 is expanded in the initial stage of expansion and a cable 2 is kept fixed to a center hub 3 and can not freely move. As the expansion advances, the cable 2 is pulled by the expansion rib 4 and tensile force is applied to a first housing cable 6. When the tensile force is applied to the housing cable 6, a planar spring 8 is bent, the housing cable 6 is released and a part of the cable is released, however, since the tensile force is already added to the cable 2, a movable range is extremely less and the entanglement is hardly generated. By repeating the operation and successively releasing the housing cables 6 to which the tensile force is applied, since the free movement of the cable is suppressed to a minimum during the entire extension, the entanglement is reduced.

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 mounted on space equipment such as artificial satellites.

[0002]

2. Description of the Related Art A larger antenna reflector for space has been required with the expansion of space use. However, since the launcher storage space at launch is limited, it is launched in a small folded state. A method of deploying in outer space is being studied. FIG. 28 shows an example of a deployable antenna reflecting mirror surface that has been conventionally studied. FIG. 28 (a) shows a housed state and FIG. 28 (b) shows a deployed state. Is a foldable metal mesh that constitutes a reflecting mirror surface, 2 is a foldable cable that retains the shape of the metal mesh, 3 is a center hub that fixes a deployment hinge, and 4 is the above-mentioned metal mesh and cable that are deployed on a track, Deployment ribs 5 for holding the metal mesh and the cable after the deployment are deployment hinges for deploying the deployment rib 4. Further, FIG. 29 is a diagram showing the development of the conventional example,
Since all the cables are released, their movement is a major cause of entanglement. The material of the cable is a quartz cable with a small coefficient of linear expansion, high strength and rigidity, and the configuration is a mirror side cable stretched between adjacent deployment ribs to hold the metal mesh in the shape of the mirror surface and the mirror side cable. It is composed of a tie cable that pulls the tie cable to the back side, and a back side cable that supports the other end of the tie cable and is pulled in the hoop direction in the same way as the mirror surface side.The cable on the mirror surface side is integrated in the state sewn into the metal mesh. ing. This antenna is housed in a rocket fairing with a diameter of about 2 to 4 m and is launched on the orbit after launch.
Entanglement of the cable at that time gives a fatal result to the deployment of the antenna. An example of entanglement is that the connector connecting the cables goes to the opposite side of what the other cable should be and the other cable is stretched before it returns to the correct position. There are cases in which it becomes impossible to return, or the cable is tied together with itself or another cable in a form of a knot, and the binding cannot be released even if it is stretched. As a measure against them, the back side where the entanglement is most likely to occur is partially covered with a film of polyimide film so that the positional relationship between the connector and other cables does not change or the length of the cable is changed. The occurrence of entanglement has been reduced by shortening the number as much as possible and reducing the number of lines.

[0003]

However, even if all the cables move freely before the tension is applied during the unfolding and they are connected and partially covered with the film,
The part of the membrane that is not connected to the cable is twisted and entangled with other cables or connectors, and even if the length of the cable is shortened or the number of cables is reduced Since the entanglement in which the cable forms a knot with itself or another cable can still occur, the deployment reliability of the deployable antenna reflector is significantly reduced, and it is a great constraint on the increase in size of the antenna reflector surface.

The present invention has been made in order to solve the above problems, and can be deployed with high reliability even when the number of cables or the length of cables is increased by increasing the size of the reflecting mirror surface. The objective is to obtain a flexible deployable antenna reflector.

[0005]

A deployable antenna reflector according to the present invention has a storage cable for discretely fixing a cable holding a mirror-like mesh shape to a center hub and a deploying rib to generate force. It is provided with a storage cable release mechanism for sequentially releasing the added storage cables.

In the deployable antenna reflector using the flat cable spring as the storage cable release mechanism for fixing the cable to the center hub discretely by the storage cable, only the expansion rib is expanded at the initial stage of expansion. However, the cable is still fixed to the center hub and cannot move freely. As the deployment progresses, the cable is pulled by the deployment ribs, providing tension to the initial storage cable. When tension is applied to the storage cable, the flat spring bends and releases the storage cable to release a part of the cable. Unlikely to occur. By repeating this operation to release the tensioned storage cables in sequence, free movement of the cables can be suppressed to a minimum throughout the entire development, so that entanglement can be reduced. In addition, the storage cable release mechanism using a flat spring has a simple structure and can be manufactured at low cost, has high reliability in function, is lightweight, and can arrange many mechanisms in a limited space.

Further, even in the deploying antenna utilizing the leaf springs for the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cables can be suppressed to the minimum, so that the cables in the deployment can be prevented. It is possible to reduce the occurrence of entanglement. In addition, the storage cable release mechanism using the leaf spring is
A large release load can be selected in a small space, and high resistance to repeated use including ground tests can be obtained.

Further, in the deployment antenna using the torsion coil spring as the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cable can be suppressed to the minimum. Can be reduced. In addition, the storage cable release mechanism using the torsion coil spring can select the release load in a wide range and can set the release load with high accuracy.

Further, also in the deploying antenna utilizing the deformed torsion coil spring in which the tip of the torsion coil spring is bent to the storage cable release mechanism so that the storage cable can be easily hooked, the cables are sequentially released during the deployment and the free movement of the cable is ensured. Since it can be suppressed to a minimum, it is possible to reduce the occurrence of cable entanglement during the expansion. In addition to the features of the torsion coil spring, the storage cable release mechanism using the deformed torsion coil spring can reduce the risk of the cable coming off due to vibration or acoustic load in the launch environment.

Further, even in the deployment antenna using a spiral spring in the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cables can be suppressed to a minimum, so that the cables are entangled during the deployment. Can be reduced.
In addition, the storage cable release mechanism that uses a spiral spring is easy to stack and mount, so you can effectively use the space, and since you can take a large stroke from the beginning of applying force to the release, Can be held for a longer time, so that the occurrence of entanglement can be suppressed.

Also, in the deployment antenna using the torsion bar spring for the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cables can be suppressed to the minimum. It is possible to reduce the occurrence of entanglement.
Further, the storage cable release mechanism using the torsion bar spring has a simple structure and can be manufactured at low cost, has high reliability in function, is lightweight, and can set the release load accurately.

Further, when a spring is used for the storage cable release mechanism, even in the deploying antenna in which the mount is supported by a pin so as to be free from uniaxial rotation, the cables are sequentially released during the deployment, and the free movement of the cable is ensured. Since it can be suppressed to a minimum, it is possible to reduce the occurrence of cable entanglement during deployment. In addition, the storage cable release mechanism that uses a pin-supported spring does not require the spring to be mounted according to the load direction from the storage cable, and the storage cable must be released reliably even when the load direction changes. You can

Further, in the deployment antenna using the taper chuck as the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cable can be suppressed to the minimum. Can be reduced. In addition, the storage cable release mechanism using the taper chuck can easily increase the holding force for loads other than the tensile load from the storage cable, and there is a risk that the storage cable will come off due to vibration or acoustic load in the launch environment. Can be reduced.

Also in the deployment antenna using the through hole and the shear hook in the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cable can be suppressed to the minimum. It is possible to reduce the occurrence of cable entanglement. In addition, the storage cable release mechanism that uses through holes and shear hooks has a simple structure and high function reliability, and it is easy to place many mechanisms in a narrow space, and the cable is entangled with this mechanism. Can be prevented.

Also, in the deployment antenna using the through hole and the elastic hook in the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cable can be suppressed to the minimum. It is possible to reduce the occurrence of cable entanglement. Further, the storage cable release mechanism using the through hole and the elastic hook can be used multiple times including the ground test, in addition to the features of the through hole and the shear hook.

Further, even in the deployment antenna using a rubber bush for the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cable can be suppressed to a minimum, so that the entanglement of the cables during the deployment Can be reduced.
In addition, the storage cable release mechanism that uses a rubber bush has a simple structure, can be manufactured at low cost, has high reliability of the function, is lightweight, and has a wide load that can be released. It is possible to prevent the problem of being lost.

Also, in the deployment antenna using the diaphragm for the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cable can be suppressed to the minimum. Occurrence can be reduced.
Further, the storage cable release mechanism using the diaphragm has no restriction on the load direction in which it can be released, and can reliably release the load from any direction.

Further, in the deployment antenna using the through hole in the storage cable release mechanism and the crimp terminal crimped at the tip of the storage cable, the cables are sequentially released during the deployment, and the free movement of the cable is minimized. Therefore, it is possible to reduce the occurrence of entanglement of the cables during the expansion. In addition, the storage cable release mechanism that uses through holes and crimp terminals has a simple structure and is lightweight and cost-saving, and it is easy to place many mechanisms in a narrow space and use multiple diagrams including ground tests. You can easily.

Further, in the deployment antenna using the base and the leaf spring for sandwiching the storage cable in the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cable can be suppressed to the minimum. It is possible to reduce the occurrence of cable entanglement during deployment. Further, since the storage cable release mechanism using the base and the leaf spring does not leave an annular portion or a scratch on the tip of the storage cable after being released, entanglement is less likely to occur and the storage cable can be repeatedly used.

Further, in the deployment antenna using the base for sandwiching the storage cable in the storage cable release mechanism, the leaf spring, and the adjusting mechanism for adjusting the sandwiching force, the cables are sequentially released during the deployment, and the free movement of the cable is minimized. Since it can be suppressed to the limit, it is possible to reduce the occurrence of entanglement of the cable during the expansion. In addition, the storage cable release mechanism that uses the base and leaf springs does not leave loops or scratches on the tip of the storage cable after release, so entanglement is unlikely to occur, allowing repeated use of the storage cable and pinching by the adjustment mechanism. By adjusting the force, the deployment drag can be adjusted and the deployment reliability can be improved.

Further, in the deploying antenna using the elastic member with hook in the storage cable release mechanism and the crimped terminal at one end of the storage cable, the cables are sequentially released during the deployment, and the free movement of the cable is minimized. Therefore, it is possible to reduce the occurrence of cable entanglement during the expansion. Further, since the storage cable release mechanism using the elastic member with the hook utilizes the buckling deformation of the member, the force applied to the storage cable when released can be stabilized.

Also, in the deployment antenna that uses the elastic hook and the holder for the storage cable release mechanism and the shape memory alloy opener that releases the holder at high temperature, the cables are sequentially released during the deployment, and the free movement of the cable is minimized. Since it can be suppressed to the limit, it is possible to reduce the occurrence of entanglement of the cable during the expansion. In addition, the storage cable release mechanism using the elastic hook, the holder and the opener can secure the retainability without the storage cable being disengaged under other load except in the high temperature state.

Also, in the deploying antenna using the elastic hook and the holder for the storage cable release mechanism, the shape memory alloy opener for releasing the holder at a high temperature, and the heater for forcibly heating the opener, the cables are sequentially in the process of deployment. Since it is released and the free movement of the cable can be suppressed to a minimum, the occurrence of entanglement of the cable during the expansion can be reduced. In addition, the storage cable release mechanism that uses the elastic hook, holder, and opener can secure the retainability without the storage cable coming off under other load, etc., except when the temperature is high. It can be released and can be actively released.

Further, in the deployment antenna using the cutter lock connected to one end of the storage cable in the storage cable release mechanism, the cutter held by the cutter lock and the spring for pushing out the cutter, the cables are sequentially released during the expansion. Since the free movement of the cable can be suppressed to a minimum, it is possible to reduce the occurrence of cable entanglement during the expansion. In addition, the storage cable release mechanism using the cutter improves the reliability of the mechanism itself by simple release, and since nothing remains at the tip of the storage cable, the storage cable can be prevented from being entangled with other members. .

Also, in a deploying antenna that utilizes a pair of elastic cutters attached to the storage cable release mechanism facing each other and a terminal plate fixed to the tip of the storage cable that has passed through the cutters, the cable is deployed. Since the cables are sequentially released during the process and the free movement of the cable can be suppressed to a minimum, the occurrence of cable entanglement during the expansion can be reduced. Further, the storage cable release mechanism using a cutter improves the reliability of the mechanism itself by simple release, and since nothing remains at the tip of the storage cable, the storage cable can be prevented from being entangled with other members. At the same time, the reliability of release can be improved by using a pair of cutters.

Also, in the deployment antenna using the switch fixed to the tip of the storage cable in the storage cable release mechanism, the power source, and the heater wound around the storage cable, the cables are sequentially released during the deployment, and the cables move freely. Since it can be suppressed to a minimum, it is possible to reduce the occurrence of cable entanglement during the expansion. Also, since the storage cable release mechanism that uses a heater has no sliding parts, it can be operated reliably even in an environment where frictional force changes, such as at low temperatures or in vacuum, and since nothing remains at the tip of the storage cable, the storage cable Can be prevented from being entangled with other members.

Also, in the deployment antenna using a switch fixed to the tip of the storage cable in the storage cable release mechanism, a heater wound around the power supply and the storage cable, and a redundant switch that can be forcibly opened and closed, the cable is in the middle of deployment. Since the cables are released one by one and the free movement of the cable can be suppressed to a minimum, it is possible to reduce the occurrence of cable entanglement during the expansion. Also, since the storage cable release mechanism that uses a heater has no sliding parts, it can be operated reliably even in an environment where frictional force changes, such as at low temperatures or in vacuum, and since nothing remains at the tip of the storage cable, the storage cable Can be prevented from getting entangled with other members, and by using a redundant switch, the storage cable can be forcibly cut by an external operation when the mechanism does not operate normally, and it can be released. The reliability of can be improved.

Further, even in the deploying antenna using the thin plate in which the storage cable release mechanism is provided with a notch so as to be easily broken, the cables are sequentially released during the deployment, and the free movement of the cable can be minimized. Therefore, it is possible to reduce the occurrence of entanglement of the cables during the expansion. In addition, the storage cable release mechanism using a thin plate enables weight reduction and placement in a narrow space.

Further, even in the deployment antenna using the adhesive tape for the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cables can be suppressed to the minimum, so that the entanglement of the cables during the deployment Can be reduced. Also, the storage cable release mechanism using adhesive tape is
The weight can be extremely reduced, the cost can be reduced, and the release force can be easily changed by changing the attachment area.

[0030]

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has an annular portion at the tip, and the storage portion has the annular portion fixed to the center hub. And the same number of flat springs are hung one by one. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and the flat springs, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable and the flat spring starts to bend in the axial direction of the storage cable. When the flat spring is bent to a certain extent, the annular portion of the storage cable is slid on the flat spring to be released, and the point on the cable becomes free. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. This operation is repeated according to the expansion of the expansion rib, and the cable can be expanded to the final stage while limiting the movable range as much as possible, so that the possibility of entanglement can be suppressed.

In the deployable antenna reflector according to the present invention, the cable for discretely fixing the cable to the center hub has an annular portion at the tip, and the annular portion is a storage cable fixed to the center hub. It is hung on the same number of leaf springs one by one. The leaf spring can easily obtain high rigidity and resistance to repeated use. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and the leaf springs, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and a point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable, and the leaf spring begins to bend in the axial direction of the storage cable. When the bending of the leaf spring progresses to a certain extent, the annular part of the storage cable
The leaf on the cable is released by sliding on the leaf spring. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. This operation is repeated according to the expansion of the expansion rib, and it is possible to expand while limiting the movable range of the cable to the final stage as much as possible, so the possibility of entanglement can be suppressed to a small extent, and a leaf spring is used. As a result, a large release load can be easily obtained, and it can withstand repeated use such as in ground tests.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has an annular portion at the tip, and the storage cable having the annular portion fixed to the center hub. The same number as that of the torsion coil springs are hung one by one on the claws at the ends. The torsion coil spring can accurately set the release load in a wide range. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cable and the torsion coil spring, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable and the torsion coil spring is twisted to begin directing the end claws in the axial direction of the storage cable. When the torsion of the torsion coil spring is advanced to some extent, the annular portion of the storage cable is slid on the pawl of the torsion coil spring to be released, and the point on the cable is free. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. According to the expansion of the expansion rib,
This operation is repeated, and it is possible to expand while limiting the movable range of the cable to the final stage as much as possible, so the possibility of entanglement can be suppressed to a small extent, and the release load range can be widened by using the torsion coil spring. Can be set with high precision.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has an annular portion at the tip, and the storage cable having the annular portion fixed to the center hub. The same number of end portions are bent one by one so that the storage cable can be easily hooked, and the deformed torsion coil springs are hooked one by one to the end claws. In addition to the features of the torsion coil spring, the deformed torsion coil spring can prevent unplanned release due to sound or vibration load in a launch environment. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and the deformed torsion coil springs, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable and the deforming torsion coil spring is twisted to start directing the end claws in the axial direction of the storage cable. When the twist of the deformed torsion coil spring is advanced to some extent, the annular portion of the storage cable is slid and released on the claw of the deformed torsion coil spring, and the point on the cable becomes free. At this stage, the cable is already under tension due to the deployment of the deployment ribs, so the range of motion is very small,
The possibility of entanglement becomes smaller accordingly. This operation is repeated according to the expansion of the expansion ribs, and it is possible to expand it while limiting the movable range of the cable as much as possible until the final stage, so the possibility of entanglement can be suppressed to a small extent,
Further, by using the deformed torsion coil spring, the release load can be accurately set in a wide range, and further, an unexpected release at the time of launch can be prevented.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has an annular portion at the tip, and the storage cable having the annular portion fixed to the center hub. It is hung on the claws at the end of the same number of spiral springs one by one. Since the spiral springs can be mounted in piles, space can be effectively used, and since the stroke from the start of application of force to the release can be made large, the cable can be held for a longer time and the occurrence of entanglement can be suppressed. You can Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cable and the spiral spring, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib,
Begin pulling outward on the point on the cable that is closest to the deployment rib that is secured to the center hub by the storage cable. When the point on the cable moves away from the center hub by more than the length of the storage cable, tension is applied to the storage cable, causing the spiral spring to twist and begin to direct the end claws in the axial direction of the storage cable. When the torsion of the spiral spring has advanced to a certain extent, the annular portion of the storage cable slides over the pawls of the spiral spring and is released, and the points on the cable are free. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased.
This operation is repeated according to the expansion of the expansion rib, and it is possible to expand while limiting the movable range of the cable to the final stage as much as possible, so the possibility of entanglement can be suppressed to a small extent, and a spiral spring can be used. Can effectively utilize the space on the center hub.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has an annular portion at the tip, and the storage portion has the annular portion fixed to the center hub. The same number as that of the torsion bar springs are hooked one by one to the claws at the ends. The torsion bar spring has a simple structure, is inexpensive, has high reliability, is lightweight, and can set the release load with high accuracy. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and the torsion bar springs, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. When the point on the cable moves away from the center hub by more than the length of the storage cable, tension is applied to the storage cable, causing the torsion bar spring to twist and the end claws to begin to orient in the axial direction of the storage cable. When the torsion of the torsion bar spring is advanced to some extent, the annular portion of the storage cable is released by sliding on the pawl of the torsion bar spring, and the point on the cable is released. At this stage, the cable is already under tension due to the deployment of the deployment ribs, so the range of motion is very small,
The possibility of entanglement mp can be kept small, and by using a torsion bar spring, the release load can be set accurately with low cost, high reliability, and light weight.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has an annular portion at its tip, and the annular portion is accommodated in a pin supported by the center hub. The same number of springs as the cables are hung on the claws at the ends. The pin-supported spring can be reliably released without being affected by the load direction from the storage cable. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and springs supported by pins, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. If the point on the cable is more than the length of the storage cable away from the center hub,
Tension is applied to the storage cable, which causes the spring to rotate about the pin support and at the same time deforms to start directing the end claws in the axial direction of the storage cable. When the deformation of the spring progresses to a certain extent, the annular portion of the storage cable slides over the pawl of the spring and is released, leaving the point on the cable free. At this stage, the cable is already tensioned by the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement becomes small accordingly. This operation is repeated according to the expansion of the expansion rib, and it is possible to expand the cable while limiting the movable range of the cable to the final stage as much as possible. By using it, it can be released reliably without being affected by the direction of the load from the storage cable.

In the deployable antenna reflector according to the present invention, the storage cables for discretely fixing the cables to the center hub are held by the same number of taper chucks as the storage cables fixed to the center hub. There is. The taper chuck can easily increase the holding force against loads other than the tensile load from the storage cable,
It is possible to prevent the storage cable from being released unexpectedly due to vibration or acoustic load in the launch environment. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and the taper chuck, the movable range in the initial stage of deployment is extremely limited. When the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and a point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable, the holding portion of the taper chuck is released and the storage cable is released, and the point on the cable is free. At this stage, the cable is already under tension due to the expansion of the expansion ribs,
The range of motion is very small and limited, and the possibility of entanglement is correspondingly reduced. This operation is repeated according to the expansion of the expansion rib, and it is possible to expand while limiting the movable range of the cable to the final stage as much as possible, so the possibility of entanglement can be suppressed and the use of a taper chuck As a result, the holding force of the storage cable with respect to a load other than the axial direction can be increased, so that unexpected release due to vibration at launch and acoustic load can be prevented.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has an annular portion at the tip, and the storage cable is fixed to the center hub. It goes through the same number of through holes and is hung on the shear hooks one by one. With the through holes, the storage cables are arranged in an orderly manner, and it is possible to prevent the storage cables and cables from being entangled in the storage cables and the shear hooks. You can prevent it from coming off. The shear hook is a hook that shears and breaks when a prescribed shear load is applied, has a simple structure, is highly reliable, and can be arranged without taking up a large area. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and shear hooks, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. If the point on the cable is more than the length of the storage cable away from the center hub,
Tension is applied to the storage cable, and shearing force is applied to the shear hook to break it. When the shear hook is broken, the annular part of the storage cable is released through the through hole,
The points on the cable are free. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. This operation is repeated according to the expansion of the expansion ribs, and it is possible to expand while limiting the movable range of the cable to the final stage as much as possible, so the possibility of entanglement can be suppressed to a small extent.
Since the structure can be simplified by using the through hole and the shear hook, high reliability and miniaturization can be achieved.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has an annular portion at the tip, and the storage portion has the annular portion fixed to the center hub. It goes through the same number of through holes and is hung on the elastic hooks one by one. With the through holes, the storage cables are arranged in an orderly manner, and it is possible to prevent the storage cables and cables from being entangled in the storage cables and the elastic hooks. At the same time, the storage cables are elastic hooks due to the vibration load and acoustic load at launch. You can prevent it from coming off. The elastic hook is a hook that elastically deforms when a prescribed shear load is applied, has a simple structure, has high reliability, can be arranged without taking a large area, and can be repeatedly used a plurality of times. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and elastic hooks, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable and shearing force is applied to the elastic hook to deform it. When the hook is elastically deformed, the annular portion of the storage cable is disengaged from the hook, released through the through hole, and the point on the cable is free. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. This operation is repeated according to the expansion of the expansion rib, and it is possible to expand the cable while limiting the movable range of the cable to the final stage as much as possible. Since the structure can be simplified by using it, high reliability and miniaturization can be achieved, and it can be used multiple times including ground tests.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has a ball end with a crimped end, and the end is fixed to the center hub. There are as many rubber bush holes as there are storage cables. The hole of the rubber bush is made smaller than the ball end, and the tip of the storage cable is fixed to the center hub by elastically deforming the rubber bush and passing the ball end. The rubber bush has a simple structure, can be manufactured at low cost, is lightweight and has high reliability, and at the same time, can have a wide range of releasable load directions. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and the rubber bushes, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. When the point on the cable is separated from the center hub by more than the length of the stored cable, tension is applied to the stored cable, the rubber bush is elastically deformed, the ball end is pulled out from the rubber bush, the stored cable is released, and the cable on the cable is released. The points will be free. At this stage, the cable is already under tension due to the expansion of the expansion ribs,
The range of motion is very small and limited, and the possibility of entanglement is correspondingly reduced. This operation is repeated according to the expansion of the expansion ribs, and the movable range of the cable can be expanded to the final stage as much as possible, so the possibility of entanglement can be minimized, and the use of a rubber bush is also recommended. Since the structure can be simplified, the cost can be reduced, the reliability can be improved, the weight can be further reduced, and the releasable load direction can be widened.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has an annular portion at the tip, and the storage cable having the annular portion fixed to the center hub. Hooks attached to the center of the same number of diaphragms are hung one by one. The deformation of the diaphragm does not depend on the direction within the plane parallel to the diaphragm, so no matter which direction the load from the storage cable is,
It can be surely released. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and hooks attached to the diaphragm, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable, the diaphragm is deformed and the hook tilts in the load direction. When the hook is tilted to some extent, the annular portion of the storage cable slides over the hook and is released, leaving the point on the cable free. At this stage,
Since the cable is already tensioned by the deployment of the deployment ribs, the range of motion is limited to a very small extent and the possibility of entanglement is correspondingly reduced. This operation is repeated according to the expansion of the expansion ribs, and it is possible to expand while limiting the movable range of the cable to the final stage as much as possible, so the possibility of entanglement can be suppressed to a small extent.
By using the diaphragm and hook, the load from the storage cable can be reliably released regardless of the direction from which the load is applied.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub passes through the same number of through holes as the storage cables fixed to the center hub, and the tip thereof is crimped. It is crimped at the terminal. The crimp terminal is made larger than the through hole, and the tip of the storage cable is passed through the through hole and then crimped with the crimp terminal to fix it to the center hub. The through-holes allow the storage cables to be arranged in an orderly manner and prevent the storage cables from being entangled with each other. The crimp terminal is designed so that when a tensile load greater than the holding force is applied to the storage cable, the storage cable can be pulled out, the structure is simple and the cost can be reduced, and the shape of the storage cable holder is very small and Can be lightened. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and the crimp terminals, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable, the storage cable is released from the crimp terminal, the storage cable is released, and the point on the cable becomes free. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. This operation is repeated according to the expansion of the expansion rib, and it is possible to expand while limiting the movable range of the cable to the final stage as much as possible, so the possibility of entanglement can be suppressed and the through hole and crimp terminal can be By using it, the structure can be simplified and the shape can be made small and light.

In the deployable antenna reflector according to the present invention, the storage cables for discretely fixing the cables to the center hub have the same number of plates as the base fixed to the center hub and the storage cables attached to the base. It is sandwiched by springs one by one. The storage cable is held by the frictional force sandwiched between the base and the leaf spring, and when a tensile load exceeding the frictional force is applied to the storage cable, the storage cable begins to slide between the base and the leaf spring and is eventually released. However, the time until it can be released can be adjusted by the length of the storage cable to be inserted first. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and leaf springs, the movable range in the initial stage of deployment is extremely limited.
As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. When the point on the cable moves further away from the center hub than the length of the storage cable, tension is applied to the storage cable, causing the storage cable to begin to slide between the base and leaf springs, after sliding the length it was initially pinched. , The storage cable is released and the points on the cable are free. At this stage, the cable is already under tension due to the expansion of the expansion ribs,
The range of motion is very small and limited, and the possibility of entanglement is correspondingly reduced. This operation is repeated according to the expansion of the expansion ribs, and it is possible to expand the cable while limiting the movable range of the cable to the final stage as much as possible, so the possibility of entanglement can be minimized, and the friction between the base and the leaf spring By utilizing the force, the timing of releasing the storage cable can be set freely.

In the deployable antenna reflector according to the present invention, the storage cables for discretely fixing the cables to the center hub have the same number of adjustments as the base fixed to the center hub and the storage cables attached to the base. Each one is sandwiched by a leaf spring having a mechanism. The adjustment mechanism is for finely adjusting the force with which the base and the leaf spring press the storage cable, and thereby the storage cable release load can be set finely. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and leaf springs, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. When the point on the cable moves further away from the center hub than the length of the storage cable, tension is applied to the storage cable, causing the storage cable to begin to slide between the base and leaf springs, after sliding the length it was initially pinched. , The storage cable is released and the points on the cable are free. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. This operation is repeated according to the expansion of the expansion ribs, and it is possible to expand the cable while limiting the movable range of the cable to the final stage as much as possible. By using the force, you can freely set the timing of the storage cable release,
The adjustment mechanism allows the storage cable release load to be set finely.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has a crimped terminal at the tip, and the tip is in a direction opposite to the deploying direction. Each of them is pressed one by one with the same number of elastic member claws as the storage cables fixed to the center hub in a bent shape. When the storage cable is applied with a tensile load more than the specified value in the expansion direction, the claws of the elastic member are pulled in the expansion direction, and the elastic member is buckled and deformed to be bent in the expansion direction to release the storage cable. Since the buckling deformation load of the elastic member is very small,
The storage cable release load can be easily maintained at a stable value. Since the cable and the mesh that form the reflecting mirror surface are fixed to the center hub by the storage cable and the elastic member, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward.
When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable, and the claws of the elastic member are pulled in the deployment direction and buckled and deformed to bend in the deployment direction. The cable is released and the points on the cable are free. At this stage, the cable is already under tension due to the expansion of the expansion ribs,
The range of motion is very small and limited, and the possibility of entanglement is correspondingly reduced. This operation is repeated according to the expansion of the expansion rib, and the movable range of the cable can be expanded to the final stage as much as possible, so the possibility of entanglement can be suppressed and the buckling deformation of the elastic member can be suppressed. By using, the storage cable release load can be easily maintained at a stable value.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has an annular portion at the tip, and the storage cable having the annular portion fixed to the center hub. It is hung on the same number of elastic hooks as one by one. Elastic hook
Elastic deformation is restrained by the holder attached to the center hub, and it is possible to reliably prevent unexpected release of the storage cable due to vibration or acoustic load in the launch environment. Further, an opener made of a shape memory alloy is sandwiched between the holder and the center hub, and the characteristic of the shape memory alloy can be used to warm the opener to release the constraint on the elastic hook. The cables and meshes forming the reflecting mirror surface are securely restrained to the center hub by the storage cables, elastic hooks and holders at the time of launching, so that the movable range is extremely limited. The holder is restrained from the elastic hook by warming the opener immediately before deployment, but even at this time, since the cable and the mesh are restrained by the storage cable and the elastic hook, the movable range of the holder remains restricted. When the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable starts to be pulled in the outer peripheral direction. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable and shearing force is applied to the elastic hook to deform it. When the elastic hook is deformed, the annular portion of the storage cable is disengaged from the elastic hook and the storage cable is released, freeing the points on the cable. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. This operation is repeated according to the expansion of the expansion rib, and it is possible to expand the cable while limiting the movable range of the cable to the final stage as much as possible, so the possibility of entanglement can be suppressed and the characteristics of shape memory alloy You can use it to restrain the storage cable until just before deployment and to prevent unplanned release.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has an annular portion at the tip, and the storage cable having the annular portion fixed to the center hub. It is hung on the same number of elastic hooks as one by one. Elastic hook
Elastic deformation is restrained by the holder attached to the center hub, and it is possible to reliably prevent unexpected release of the storage cable due to vibration or acoustic load in the launch environment. Also, an opener made of a shape memory alloy with a heater is sandwiched between the holder and the center hub, and the characteristic of the shape memory alloy can be used to warm the opener to release the constraint on the elastic hook. . It is also possible to remove the restraint of the holder with respect to the elastic hook by turning on the heater with a command from the ground and forcibly heating the opener, improving the reliability of the deployment operation as a redundant system or deploying it. More active control is possible. The cables and meshes forming the reflecting mirror surface are securely restrained to the center hub by the storage cables, elastic hooks and holders at the time of launching, so that the movable range is extremely limited. The holder is restrained from the elastic hook by warming the opener immediately before deployment, but even at this time, since the cable and the mesh are restrained by the storage cable and the elastic hook, the movable range of the holder remains restricted. When the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable starts to be pulled in the outer peripheral direction. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable and shearing force is applied to the elastic hook to deform it. When the elastic hook is deformed, the annular portion of the storage cable is disengaged from the elastic hook and the storage cable is released, freeing the points on the cable. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. This operation is repeated according to the expansion of the expansion rib, and it is possible to expand the cable while limiting the movable range of the cable to the final stage as much as possible, so the possibility of entanglement can be suppressed and the characteristics of the shape memory alloy can be reduced. By using it, it is possible to restrain the storage cable until just before deployment and to prevent unintended release reliably, and forcibly heat the opener using a heater to improve the reliability of deployment operation as a redundant system. Active control is possible.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has its tip fixed to the end portion of the cutter lock of the same number as the storage cables attached to the center hub. The cutter lock is uniaxially rotatable on the center hub. Further, a cutter having the same number of springs as the storage cable is fixed to the center hub immediately above the storage cable axis, and the cutter is held in a state where the spring is contracted by the cutter lock. When a tensile load in the developing direction is applied to the storage cable, the cutter lock rotates to release the cutter, and the contracted spring extends to cause the cutter to cut the storage cable and release the storage cable. The cutting with a cutter has a simple mechanism, and since nothing remains at the end of the cut storage cable, entanglement is unlikely to occur, and deployment reliability is high. The cables and meshes that form the reflecting mirror surface are fixed to the center hub by the storage cable and the cutter lock, so the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. If the point on the cable is more than the length of the storage cable away from the center hub,
The storage cable is tensioned, the cutter lock rotates, the cutter is released, and the contracted spring extends to cause the cutter to cut the storage cable, releasing the storage cable and freeing the points on the cable. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. This operation is repeated in accordance with the expansion of the expansion ribs, and it is possible to expand the cable while limiting the movable range of the cable to the final stage as much as possible. Since nothing remains at the end of the storage cable that is simple and cut, entanglement is unlikely to occur, and deployment reliability can be improved.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub passes between a pair of elastic cutters of the same number as the storage cables attached to the center hub, It has a terminal plate at its tip. The storage cable is
It is held by an elastic cutter and terminal plate,
When a tensile load is applied to the storage cable in the deployment direction, the terminal plate at the end of the storage cable presses the elastic cutter,
The elastic cutter elastically deforms to cut the storage cable, and the storage cable is released. Cutting with a cutter has a simple mechanism and since there is nothing left at the end of the cut storage cable, entanglement is unlikely to occur, and a redundant system can be configured by using a pair of elastic cutters. , Deployment reliability can be very high. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cable, the terminal plate, and the elastic cutter, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflector surface by the expansion hinge progresses,
Tension is applied to the cable closest to the deployment rib and begins pulling outward on the cable closest to the deployment rib secured to the center hub by the storage cable. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable, the terminal plate presses the elastic cutter, the elastic cutter elastically deforms and cuts the storage cable. Once released, the points on the cable are free. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. This operation is repeated according to the expansion of the expansion ribs, and it is possible to expand while limiting the movable range of the cable to the final stage as much as possible, so the possibility of entanglement can be suppressed to a small extent.
Cutting with a cutter has a simple mechanism and nothing is left at the end of the cut storage cable, so entanglement does not easily occur, and a redundant system can be configured by using a pair of elastic cutters, Deployment reliability can be very high.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub includes a storage cable having a heater attached to the tip and an end attached to the center hub. It is fixed to the switches of the same number of heater electric circuits.
The switch is uniaxially rotatable on the center hub, and it is pulled by a spring attached to the center hub in the direction opposite to the deployment direction to open the heater electric circuit and prevent electricity from flowing. ing. When a tensile load is applied to the storage cable in the expansion direction, the switch rotates in the expansion direction against the force of the spring, the heater electric circuit is closed and electricity flows, the storage cable is heated and cut, and the storage cable is released. Therefore, there are few mechanical sliding parts,
Stable characteristics can be obtained even when the on-orbit environment is different from that predicted. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables, the switches, and the springs attached to the switches, the movable range in the initial stage of deployment is extremely limited.
When the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable starts to be pulled in the outer peripheral direction. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable, the switch rotates in the deploying direction against the force of the spring, the heater electric circuit closes, and electricity flows. Then, the storage cable is heat-cut, the storage cable is released, and the points on the cable are free. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased.
This operation is repeated according to the expansion of the expansion ribs, and it is possible to expand the cable while limiting the movable range of the cable to the final stage as much as possible. It is possible to obtain stable characteristics even when there are few sliding parts and the on-orbit environment differs from that predicted.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has a heater attached to the tip end and the end portion attached to the center hub. It is fixed to the switches of the same number of heater electric circuits.
In the heater electric circuit, in addition to the switch at the tip of the storage cable, another electric force switch is incorporated in parallel to form a redundant system. The switch is uniaxially rotatable on the center hub, and it is pulled by a spring attached to the center hub in the direction opposite to the deployment direction to open the heater electric circuit and prevent electricity from flowing. ing. When a tensile load is applied to the storage cable in the deployment direction, the switch rotates in the deployment direction against the force of the spring,
The heater electric circuit is closed and electricity flows to heat and cut the storage cable, and the storage cable is released. Even if the switch does not work for some reason, by turning on the compulsory switch with an external command,
The storage cable can be cut by heating, and the deployment reliability can be made extremely high. Since there are few mechanical sliding parts and an electrical redundant system is provided, stable characteristics can be obtained even when the on-orbit environment is significantly different from the prediction. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables, the switches, and the springs attached to the switches, the movable range in the initial stage of deployment is extremely limited. As the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable begins to be pulled outward. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable, the switch rotates in the deploying direction against the force of the spring, the heater electric circuit closes, and electricity flows. Then, the storage cable is heat-cut, the storage cable is released, and the points on the cable are free. Even if the switch does not work for some reason, the storage cable can be cut by heating by turning on the compulsory switch by an external command. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. This operation is repeated according to the expansion of the expansion ribs, and it is possible to expand the cable while limiting the movable range of the cable to the final stage as much as possible. Since there are few sliding parts and an electrical redundant system is also provided, stable characteristics can be obtained even when the on-orbit environment is significantly different from the prediction.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has a thin plate at the tip, and the plate is attached to the center hub. The plate has slits on both sides of the contact point with the storage cable. When a tensile load in the developing direction is applied to the storage cable, the plate is broken from the slit portion and the storage cable is released. The plate is thin and lightweight,
Since the structure is simple and the area occupied is small, the degree of freedom of arrangement is large and the cost can be reduced. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and plates, the movable range in the initial stage of deployment is extremely limited. When the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable starts to be pulled in the outer peripheral direction. When the point on the cable moves away from the center hub by more than the length of the storage cable, tension is applied to the storage cable, the plate breaks from the notch, the storage cable is released, and the point on the cable is free. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. This operation is repeated according to the expansion of the expansion rib, and it is possible to expand the cable while limiting the movable range of the cable to the final stage as much as possible. In addition, since the structure is simple and the area occupied is small, the degree of freedom of arrangement is large and the cost can be reduced.

In the deployable antenna reflector according to the present invention, the storage cable for discretely fixing the cable to the center hub has an adhesive tape at the tip, and the adhesive tape has a contact point with the storage cable in the deployment direction. It is attached to the center hub so that it is on the opposite side. When a tensile load in the developing direction is applied to the storage cable, the adhesive tape peels off from the contact side with the storage cable, and the storage cable is released. The adhesive tape is very light in weight, has a simple structure, and can reduce costs, and the load of the stored cable can be easily adjusted by changing the adhesive area. Since the cables and meshes forming the reflecting mirror surface are fixed to the center hub by the storage cables and the adhesive tape, the movable range in the initial stage of deployment is extremely limited. When the expansion of the reflecting mirror surface by the expansion hinge progresses, tension is applied to the cable closest to the expansion rib, and the point on the cable closest to the expansion rib fixed to the center hub by the storage cable starts to be pulled in the outer peripheral direction. When the point on the cable is separated from the center hub by more than the length of the storage cable, tension is applied to the storage cable, the adhesive tape peels off from the contact side with the storage cable, the storage cable is released, and the cable on the cable is released. The points are free. At this stage, the cable is already under tension due to the expansion of the expansion ribs, so that the movable range is limited to a very small range, and the possibility of entanglement is accordingly decreased. This operation is repeated according to the expansion of the expansion rib, and it is possible to expand while limiting the movable range of the cable to the final stage as much as possible, so the possibility of entanglement can be suppressed and it is extremely light and the structure is simple. Thus, the cost can be reduced, and the storage cable release load can be easily adjusted by changing the adhesion area.

[0054]

【Example】

Example 1. FIG. 1 is a diagram showing an embodiment of a deployable antenna reflector according to the present invention. In the figure, 1 is a metal mesh, 2 is a cable, 3 is a center hub, 4 is a deployment rib, 5 is a deployment hinge, 6 is a storage cable, 7 is a storage cable release mechanism, and 8 is a flat spring. ) Is an overall view of a housed state, and FIG. 1B is an enlarged view showing a housed cable and a housed cable release mechanism. 2 to 4 are views showing a deployment sequence of this deployment type antenna reflector, and as the deployment rib 4 deploys, the cable 2 is sequentially released from the portion to which the force is applied. This deployable antenna reflector is mounted on the launcher in the stored state,
Deployment rib 4 and deployment hinge 5 after being launched into orbit
Expanded to a large diameter. During the expansion, the cables 2 and the storage cables 6 are fixed to the center hub 3, and the storage cables 6 are released by the storage cable release mechanism 7 in the order in which tension is applied by the force from the expansion ribs 4. An annular portion at the end of the storage cable 6 is hooked on the flat spring 8 that constitutes the storage cable release mechanism 7, and when tension is applied to the storage cable 6, the storage cable 6 begins to bend in the axial direction of the storage cable 6 to some extent. The storage cable 6 is released when the bending is advanced to. At this stage, since the cable is already tensioned by the expansion of the expansion rib, the time and the area in which the cable 2 can move freely are reduced, and the possibility of entanglement is extremely reduced. Further, the flat spring 8 has a simple structure because it can be manufactured at a very low cost because one flat spring steel plate constitutes one mechanism, and only one bending process for mounting is sufficient to satisfy the function. High reliability due to few failure modes. Further, since the structure is simple, it is easy to reduce the size and weight.

Example 2. Also, it is desired to increase the release load of the storage cable 6, but the storage cable release mechanism 7
In the case where the mounting space cannot be sufficiently secured, and when the ground test and the like require a large number of times and resistance to repeated loads is required, a leaf spring can be used for the storage cable release mechanism 7. FIG. 5 shows an example thereof. In the figure, 9 is a leaf spring. Since the leaf spring 9 has a structure in which a plurality of flat leaf springs are superposed on each other, the release load can be increased without taking up a large space, and high durability as a structural member can be realized.

Example 3. Further, when there is not a large margin for the deploying force but it is desired to take the release load as large as possible, a torsion coil spring can be used for the storage cable release mechanism 7. FIG. 6 shows an example thereof. In the figure, 10 is a torsion coil spring. Although the torsion coil spring 10 is a torsion spring, the stress generated is a tensile stress in the axial direction of the member, so that the release load can be set accurately, and the load range can be easily changed by changing the number of turns. Therefore, it is possible to select a plurality of load cases without changing the design such as the mounting method.

Example 4. In addition, under the same conditions as those in the above-described embodiment and when vibration and acoustic load in the launch environment are large and the storage cable 6 may be disengaged from the storage cable release mechanism 7, both ends of the torsion coil spring are bent symmetrically. It is possible to use a method in which the storage cables 6 are crossed and then the storage cables 6 are applied to both ends at once. FIG. 7 shows an example thereof. In the drawing, 11 is a deformed torsion coil spring. By using this example, the characteristics of the torsion coil spring can be maintained, and a mechanism can be configured in which the storage cable 6 does not easily come off the storage cable release mechanism under a load other than the tension of the storage cable.

Example 5. Further, when there is a member that is easily entangled in the immediate vicinity of the reflecting mirror and it is desired to hold the storage cable 6 as far as possible outward, a spiral spring can be used for the storage cable release mechanism 7. FIG. 8 shows an example thereof. In the figure, 12 is a spiral spring. Since the spiral spring can absorb a large amount of energy in a limited space, even if a large deformation is applied, the load level does not change much. Therefore, even if the setting is such that the stroke until release is set to be large, the magnitude of the release load does not change so much, so that the release point can be provided considerably outside of the initial set position. Further, since a plurality of spiral springs can be stacked and mounted, they can be used even when the space is limited.

Example 6. Further, in the case of a reflecting mirror that has no margin in deploying force, weight, and cost, and has a large number of storage cables 6 and high reliability is required, a torsion bar spring can be used for the storage cable release mechanism 7. . FIG. 9 shows an example thereof. In the drawing, 13 is a torsion bar spring. The torsion bar spring 13 is a spring that utilizes the torsional rigidity of a flat plate of spring steel. It has a simple structure, can be manufactured at low cost, has few failure modes, is highly reliable, and is lightweight. Further, since the torsional rigidity is used, the variation in the release load can be suppressed, and the error amount to be expected can be made, so that the design of the deployment force can be made to the last.

Example 7. In addition, when the load direction of the storage cable 6 extends in many directions and it is difficult to set the angle of the storage cable release mechanism, it is effective to pin mount various springs in the in-plane rotational direction. FIG. 10 shows an example thereof. In the drawing, 14 is a pin mount. When the load of the storage cable 6 is received from an oblique direction, the pin-mounted spring rotates about the pin and turns to the load direction to reliably release the storage cable 6. The storage cable release using the spring is performed. The reliability of the function of the mechanism can be improved.

Example 8. In addition, there is a large amount of the cables 2 near the center hub 3, there is a high possibility that they will get entangled with the storage cable release mechanism 7 itself, and vibration and acoustic load in the launch environment are large, and the storage cable 6 comes off the storage cable release mechanism 7. If there is a possibility that the tape will be lost, a taper chuck can be used for the storage cable release mechanism 7. FIG. 11 shows an example thereof. 1 in the figure
5 is a taper chuck. The taper chuck 15 is fixed by sandwiching a case 6 to be housed in a two-divided taper pin inserted into a taper hole, and when tension is applied to the storage cable, the taper pin is pulled out from the taper hole to release the storage cable 6. When this mechanism is used, it is not released except when tension is applied to the storage cable 6, and there is no possibility that the cable 2 is entangled in the storage cable release mechanism 7 because there is no protrusion or the like on the outside.

Example 9. In addition, there is a large amount of the cables 2 near the center hub 3, and there is a high possibility that the cables 2 will be entangled with the storage cable release mechanism 7 itself, and the storage cable 6
Since the number of units is large, the weight is reduced, and it is placed in a narrow space.
When high reliability is required, the through hole and the shear hook can be used for the storage cable release mechanism 7. FIG. 12 shows an example thereof. 6 in the figure
Is hung on the shear hook 17 in the through hole 16,
When tension is applied, the shear hook 17 breaks and the storage cable 2 is released through the through hole 16. Since the structure is simple, there are few failure modes, high reliability can be obtained, weight reduction can be achieved, and size reduction can be performed, so that many mechanisms can be arranged in a narrow space. Further, since there is no protrusion on the outside, there is no possibility that the cable 2 is entangled with the storage cable release mechanism 7.

Example 10. In addition, when it is necessary to perform deployment a plurality of times under the same conditions as in Example 9 and in a ground test or the like,
The through hole 16 and the elastic hook can be used for the storage cable release mechanism 7. FIG. 13 shows an example thereof. In the figure, 18 is an elastic hook. In this example, the storage cable 6 is hooked on the elastic hook 18 in the through hole 16, and when tension is applied, the elastic hook 18 elastically deforms and the storage cable 2 is released from the hook and released through the through hole 16. In this case, in addition to the features of the ninth embodiment, since the hook is not broken, it can be used repeatedly a plurality of times.

Example 11. If higher reliability is required under the same conditions as in the tenth embodiment, a rubber bush can be used for the storage cable release mechanism. Figure 1
4 shows an example. In the figure, 19 is a rubber bush,
20 is a ball end. When tension is applied to the storage cable, the ball end 20 attached to the tip of the storage cable pushes the rubber bush 19, the rubber bush 19 is elastically deformed, the ball end 20 passes through the hole of the rubber bush 19, and the storage cable is released. In this example, higher reliability can be obtained by using a mechanism that is more simplified than that of the tenth embodiment.

Example 12 Further, when the direction in which the storage cable 6 is stretched cannot be specified and the directional storage cable release mechanism cannot be used, a diaphragm can be used for the storage cable release mechanism 7. Figure 15
An example is shown in. In the figure, 21 is a diaphragm,
22 is a hook. Storage cable 6 is diaphragm 2
It is hung on the hook 22 which is erected at the center of 1, and when a tension is applied, a force in the falling direction is applied to the hook 22. Hook 22
When it tries to fall down, the diaphragm 21 is elastically deformed and the hook 22 falls down in the direction of force to release the storage cable 6. In this example, a mechanism is realized in which the storage cable is reliably released regardless of the direction in which the storage cable receives a force.

Example 13. Further, when the number of storage cables 6 is large and sufficient space and weight cannot be allocated to the storage cable release mechanism, the storage cable release mechanism 7 can use through holes and crimp terminals. FIG. 16 shows an example thereof. In the figure, 23 is a crimp terminal. Tension is applied to the storage cable 6 and the crimp terminal 2
When the crimp holding force of 3 is exceeded, the storage cable 6 is released from the crimp terminal 23 and released. Since the crimp terminal 23 has a small shape, the through hole 16 can also be made small. In this example, a mechanism that can arrange and release a large number of storage cables in an orderly manner with a small space and weight is realized.

Example 14 Further, when it is desired to hold the metal mesh 1 and the cable 2 as long as possible, a mechanism for releasing the storage cable 6 by using frictional force can be used for the storage cable release mechanism 7.
FIG. 17 shows an example thereof. In the figure, 24 is a base,
Reference numeral 25 is a leaf spring. The storage cable 6 is sandwiched between the base 24 and the leaf spring 25 and is held by a frictional force. The storage cable 6 receives the base 24 and the leaf spring 2 when tension is applied.
Since it starts to slide between 5 and is released after sliding for the length that was initially sandwiched, the release timing can be adjusted by the length of the storage cable 6 that is initially sandwiched. In this example, a mechanism capable of adjusting the timing of releasing the storage cable is realized.

Example 15 Further, in addition to the conditions of the fourteenth embodiment, when the release load of the storage cable 6 needs to be set finely, the storage cable release mechanism 7 can use a mechanism capable of adjusting the frictional force for holding the storage cable 6. . FIG. 18 shows an example thereof. In the figure,
Reference numeral 26 is an adjusting mechanism. The storage cable 6 is sandwiched between the base 24 and the leaf spring 25 and held by frictional force.
The holding force can be finely set by moving the screw of the adjusting mechanism 26 in the axial direction. The storage cable 6 starts to slide between the base 24 and the leaf spring 25 when tension is applied, and is released after sliding by the length that was initially sandwiched. Adjustable in length. In this example, a mechanism capable of adjusting the holding force of the storage cable and the release timing is realized.

Example 16. Further, when the deployment torque margin of the deployment hinge 5 is small and the variation in the release load of the storage cable 6 must be suppressed to a small level, the storage cable release mechanism 7 releases the storage cable 6 by utilizing the buckling deformation of the elastic member. A mechanism for doing so can be used. FIG. 19 shows an example thereof. In the figure, 27 is an elastic member, 28 is a claw, and 29 is a terminal. The storage cable 6 has a terminal 29 attached to the tip thereof held by a claw 28 attached to the elastic member 27. When tension is applied to the storage cable 6, the elastic member 27 buckles and the storage cable 6 is released. However, since the buckling deformation load is a very stable value peculiar to the member, the release load varies. Inevitably kept small. This example realizes a mechanism in which the release load of the storage cable is very stable.

Example 17 In addition, when vibration or acoustic load in the launch environment is severe, the storage cable release mechanism 7
A shape memory alloy can be used for the. FIG. 20 shows an example thereof. In the figure, 30 is a holder and 31 is an opener. The storage cable 6 is hung and held by the elastic hooks 18, but the elastic hooks 18 are completely restrained from elastic deformation by the holder 30. In the holder 30, the opener 31 is made of a shape memory alloy, and by warming the opener 31 immediately before deployment, the opener 31 pushes up the holder 30 to release the restraint of the elastic hook 18, and then the deployment operation is started, and the storage cable 6 is released. When tension is applied to the storage cable 6, the elastic hook 18 elastically deforms and the storage cable 6 is released. In this example, a mechanism is realized in which the storage cable is not released unexpectedly.

Example 18. Further, in addition to the conditions of the seventeenth embodiment, a shape memory alloy having a heater circuit for forcibly heating the storage cable release mechanism 7 can be used when higher deployment reliability is required. FIG. 21 shows an example thereof. In the figure, 32 is a heater. The storage cable 6 is hung and held by the elastic hooks 18, but the elastic hooks 18 are completely restrained from elastic deformation by the holder 30. In the holder 30, the opener 31 is made of a shape memory alloy, and by warming the opener 31 immediately before deployment, the opener 31 pushes up the holder 30 to release the restraint of the elastic hook 18, and then the deployment operation is started, and the storage cable 6 is released. When tension is applied to the storage cable 6, the elastic hook 18 elastically deforms and the storage cable 6 is released. In addition, even if the opener 31 cannot be warmed for some reason, the heater 32 is used to forcefully open the opener 31.
Since it can be heated, the opener 31 can reliably push up the holder 30 to release the restraint of the elastic hook 18. In this example, the storage cable is not released unexpectedly and a mechanism with high deployment reliability is realized.

Example 19 Further, if there are many protrusions and the like around the storage cable release mechanism and the storage cable is entangled or the situation itself is desired to be simplified, a cutter can be used for the storage cable release mechanism 7. FIG. 22
An example is shown in. In the figure, 33 is a cutter, 34
Is a spring and 35 is a cutter lock. Storage cable 6
When tension is applied to the cutter lock 35, the cutter lock 35
Is removed, the spring 34 pushes the cutter 33, the cutter 33 cuts the storage cable 6, and the storage cable 6 is released. However, since nothing remains at the tip of the storage cable 6, the possibility of entanglement is reduced. can do. In this example, a mechanism that can reduce the possibility of entanglement of the storage cable with a simple mechanism is realized.

Example 20. In addition to the conditions of the nineteenth embodiment, a pair of elastic cutters can be used for the storage cable release mechanism 7 if it is desired to further increase the reliability of the mechanism. FIG. 23 shows an example thereof. In the figure, 36 is an elastic cutter and 37 is an end plate. When tension is applied to the storage cable 6, the terminal plate 37 is pulled to elastically deform the elastic cutter 36. Elastic cutter 36
Have a pair of configurations and can act as a redundant system. When the elastic cutter 36 elastically deforms, the storage cable 6 is cut and the storage cable 6 is released. However, since nothing remains at the tip of the storage cable 6, the possibility of entanglement can be reduced, and the pair of elasticity cutter. In this example, the possibility of entanglement of the storage cable is reduced by a simple mechanism, and a highly reliable mechanism is realized.

Example 21. Further, when the on-orbit environment may be different from the predicted value, electric heating cutting can be used for the storage cable release mechanism 7. Figure 24
An example is shown in. In the figure, 38 is a switch, 39
Is a power source and 40 is an electric circuit. When tension is applied to the storage cable 6, the switch 38 is pulled and the electric circuit 40 is pulled.
Is closed. When electricity flows to the heater 32, the storage cable 6 is cut by heating and the storage cable 6 is released, but the mechanical sliding portion is small and stable release is possible. In this example, a mechanism is realized in which the releasing operation of the storage cable 6 is not easily affected by the on-orbit environment.

Example 22. When the reliability of the mechanism is further enhanced in addition to the conditions of the twenty-first embodiment, the storage cable release mechanism 7 can be electrically heated and cut with an electrically redundant circuit. FIG. 25 shows an example thereof.
In the figure, 41 is a forced switch. When tension is applied to the storage cable 6, the switch 38 is pulled and the electric circuit 40 is closed. Even if the switch 38 does not operate for some reason, the electric circuit 40 can be closed by turning on the compulsory switch 41 by an external command. When electricity flows to the heater 32, the storage cable 6 is cut by heating and the storage cable 6 is released, but the mechanical sliding portion is small and stable release is possible. In this example, a highly reliable mechanism that is unlikely to be affected by the on-orbit environment is realized.

Example 23. Further, when the storage cable release mechanism has a small degree of freedom in arrangement and a large space cannot be taken, a thin plate can be used for the storage cable release mechanism 7. FIG. 26 shows an example thereof. In the figure, 42 is a plate. When tension is applied to the storage cable 6, the plate 42 is pulled and broken from the notch previously made, and the storage cable 6 is released. In this example, a compact and highly flexible arrangement is realized.

Example 24. Further, when it is desired to reduce the weight of the storage cable release mechanism under the same conditions as in the twenty-third embodiment, an adhesive tape can be used for the storage cable release mechanism 7. FIG. 27 shows an example thereof. In the figure,
43 is an adhesive tape. When tension is applied to the storage cable 6, the adhesive tape 43 is pulled to break the peel and the storage cable 6 is released. In this example, a compact, highly flexible arrangement and lightweight mechanism are realized.

[0078]

According to the deployable antenna reflector according to the present invention, a storage cable for discretely fixing the cable to the center hub, one end of the storage cable is fixed to the center hub, and a force is applied in the expansion direction during the expansion. The storage cable release mechanism that releases the storage cables sequentially in the order in which they are added can prevent entanglement without reducing the number of cables in the cable network or shortening the length, and even if the reflector is enlarged You can get the performance to deploy.

Further, in the deploying antenna using a flat spring, a stack leaf spring, a coil spring, a torsion coil spring, a spiral spring or a torsion bar spring for the storage cable release mechanism, the cables are sequentially released during the deployment and the cables move freely. Since it can be suppressed to a minimum, it is possible to reduce the occurrence of cable entanglement during the expansion.

Even in the deployment antenna using the deformed torsion coil spring in which the tip of the torsion coil spring is bent to the accommodation cable release mechanism so that the accommodation cable can be easily hooked,
Since the cables are sequentially released during the expansion, and the free movement of the cables can be suppressed to a minimum, it is possible to reduce the occurrence of entanglement of the cables during the expansion. In addition to the features of the torsion coil spring, the storage cable release mechanism using the deformed torsion coil spring can reduce the risk of the cable coming off due to vibration or acoustic load in the launch environment.

Further, when a flat spring is used for the storage cable release mechanism, even in the deploying antenna in which the mount is pin-supported so as to be free from uniaxial rotation, the cables are sequentially released during the deployment and the free movement of the cable is achieved. Since it can be suppressed to a minimum, it is possible to reduce the occurrence of cable entanglement during the expansion. In addition, the storage cable release mechanism that uses a pin-supported spring does not require the spring to be mounted according to the load direction from the storage cable, and the storage cable can be released reliably even if the load direction changes. it can.

Even in the deployment antenna using the through hole and the elastic hook in the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cables can be suppressed to the minimum. It is possible to reduce the occurrence of entanglement. Further, the storage cable release mechanism using the through hole and the elastic hook can be used multiple times including the ground test, in addition to the features of the through hole and the shear hook.

Further, also in the deployment antenna using the rubber bush for the storage cable release mechanism, the cables are sequentially released during the deployment and the free movement of the cable can be suppressed to the minimum, so that the cable entanglement during the deployment Can be reduced.
In addition, the storage cable release mechanism that uses a rubber bush has a simple structure, can be manufactured at low cost, has high reliability of the function, is lightweight, allows a wide load direction to be released, and the cable is entangled in this mechanism. It is possible to prevent such a problem that it will occur.

Even in the deployment antenna using the diaphragm for the storage cable release mechanism, the cables are sequentially released during the deployment and the free movement of the cables can be suppressed to the minimum, so that the entanglement of the cables during the deployment is prevented. Can be reduced. Also,
The storage cable release mechanism using the diaphragm has no restriction on the load direction in which it can be released, and can reliably release the load from any direction.

Further, also in the deployment antenna using the taper chuck for the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cable can be suppressed to the minimum. Can be reduced. In addition, the storage cable release mechanism using the taper chuck can easily increase the holding force for loads other than the tensile load from the storage cable, and there is a risk that the storage cable will come off due to vibration or acoustic load in the launch environment. Can be reduced.

Even in the deployment antenna using the through hole and the shear hook in the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cables can be suppressed to the minimum. It is possible to reduce the occurrence of entanglement. In addition, the storage cable release mechanism that uses through holes and shear hooks has a simple structure and high function reliability, and it is easy to place many mechanisms in a narrow space, and the cable is entangled with this mechanism. Can be prevented.

Further, in the deployment antenna using the through hole in the storage cable release mechanism and the crimp terminal crimped at the tip of the storage cable, the cables are sequentially released during the deployment, and the free movement of the cable is minimized. Therefore, it is possible to reduce the occurrence of cable entanglement during the expansion. In addition, the storage cable release mechanism that uses through holes and crimp terminals has a simple structure and is lightweight and cost-saving, and it is easy to place many mechanisms in a narrow space and use multiple diagrams including ground tests. You can easily.

Even in the deployment antenna using the base and the plate spring for sandwiching the storage cable in the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cable can be suppressed to the minimum. It is possible to reduce the occurrence of cable entanglement in the cable. Further, since the storage cable release mechanism using the base and the leaf spring does not leave an annular portion or a scratch on the tip of the storage cable after being released, entanglement is less likely to occur and the storage cable can be repeatedly used.

Also, in the deployment antenna that utilizes the base for sandwiching the storage cable in the storage cable release mechanism, the leaf spring, and the adjusting mechanism for adjusting the sandwiching force, the cables are sequentially released during the deployment, and the free movement of the cable is minimized. Since it can be suppressed to the limit, it is possible to reduce the occurrence of entanglement of the cable during the expansion. In addition, the storage cable release mechanism that uses the base and leaf springs does not leave loops or scratches on the tip of the storage cable after release, so entanglement is unlikely to occur, allowing repeated use of the storage cable and pinching by the adjustment mechanism. By adjusting the force, the deployment drag can be adjusted and the deployment reliability can be improved.

Even in a deployable antenna that uses an elastic member with a hook in the storage cable release mechanism and a crimped terminal at one end of the storage cable, the cables are sequentially released during deployment, and the free movement of the cables is minimized. Therefore, it is possible to reduce the occurrence of entanglement of the cables during the expansion. In addition, the storage cable release mechanism using the elastic member with hook is
Since the buckling deformation of the member is used, the force applied to the storage cable when released can be stabilized.

Also, in the deployment antenna that uses the elastic hook and the holder for the storage cable release mechanism and the shape memory alloy opener that releases the holder at high temperature, the cables are sequentially released during the deployment, and the free movement of the cable is minimized. Since it can be suppressed to the limit, it is possible to reduce the occurrence of entanglement of the cable during the expansion. In addition, the storage cable release mechanism using the elastic hook, the holder and the opener can secure the retainability without the storage cable being disengaged under other load except in the high temperature state.

Even in the deployment antenna that uses the elastic hook and the holder for the storage cable release mechanism, the shape memory alloy opener that releases the holder at high temperature, and the heater that can forcibly heat the opener, the cables are sequentially released during the deployment. Since the free movement of the cable can be suppressed to a minimum, the occurrence of entanglement of the cable during the expansion can be reduced. In addition, the storage cable release mechanism that uses the elastic hook, holder, and opener can secure the retainability without the storage cable coming off under other load, etc., except when the temperature is high. It can be released and can be actively released.

Further, in the deployment antenna using the cutter lock connected to one end of the storage cable in the storage cable release mechanism, the cutter held by the cutter lock and the spring for pushing out the cutter, the cables are sequentially released during the expansion. Since the free movement of the cable can be suppressed to a minimum, the occurrence of entanglement of the cable during the expansion can be reduced. In addition, the storage cable release mechanism using the cutter improves the reliability of the mechanism itself by simple release, and since nothing remains at the tip of the storage cable, the storage cable can be prevented from being entangled with other members. .

In a deploying antenna using a pair of elastic cutters which are attached to the storage cable release mechanism so as to face each other and a terminal plate which is fixed between the cutters and the end plate of the storage cable, the cable is in the process of being deployed. Since the cables are released one by one and the free movement of the cables can be suppressed to a minimum, it is possible to reduce the occurrence of cable entanglement during the expansion.
Also, the storage cable release mechanism using a cutter is
The simple release improves the reliability of the mechanism itself, and since nothing remains on the tip of the storage cable, the storage cable can be prevented from being entangled with other members, and the reliability of release can be improved by using a pair of cutters. You can improve your sex.

Also, in the deployment antenna using the switch fixed to the tip of the storage cable in the storage cable release mechanism, the power source, and the heater wound around the storage cable, the cables are sequentially released during the deployment, and the cables move freely. Since it can be suppressed to a minimum, it is possible to reduce the occurrence of cable entanglement during the expansion. In addition, since the storage cable release mechanism that uses a heater does not have a sliding part, it can be operated reliably even in an environment where frictional force changes such as at low temperature or vacuum, and since nothing remains at the tip of the storage cable, the storage cable Can be prevented from being entangled with other members.

Also in the deployment antenna using the switch fixed to the tip of the storage cable in the storage cable release mechanism, the power supply and the heater wound around the storage cable, and the redundant switch that can be forcibly opened and closed, the cables are sequentially in the process of deployment. Since the cable is released and the free movement of the cable can be suppressed to a minimum, the occurrence of entanglement of the cable during the expansion can be reduced.
Also, since the storage cable release mechanism that uses a heater has no sliding parts, it can be operated reliably even in an environment where frictional force changes, such as at low temperatures or in vacuum, and since nothing remains at the tip of the storage cable, the storage cable Can be prevented from getting entangled with other members, and by using a redundant switch, the storage cable can be forcibly cut by an external operation when the mechanism does not operate normally, and it can be released. The reliability of can be improved.

Even in the deploying antenna using a thin plate that is easily broken by making a cut in the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cables can be suppressed to a minimum. It is possible to reduce the occurrence of cable entanglement during deployment. In addition, the storage cable release mechanism using a thin plate enables weight reduction and placement in a narrow space.

Also in the deployment antenna using the adhesive tape for the storage cable release mechanism, the cables are sequentially released during the deployment, and the free movement of the cables can be suppressed to the minimum, so that the entanglement of the cables during the deployment Can be reduced. Also, the storage cable release mechanism using adhesive tape is
The weight can be extremely reduced, the cost can be reduced, and the release force can be easily changed by changing the attachment area.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a deployment sequence of a deployment type antenna reflector according to the present invention.

FIG. 3 is a diagram showing a deployment sequence of a deployment type antenna reflector according to the present invention.

FIG. 4 is a diagram showing a deployment sequence of the deployment type antenna reflector according to the present invention.

FIG. 5 is a partially enlarged view showing the storage cable release mechanism of the embodiment 2 of the deployable antenna reflecting mirror according to the present invention.

FIG. 6 is a partial enlarged view showing the storage cable release mechanism of the third embodiment of the deployable antenna reflecting mirror according to the present invention.

FIG. 7 is a partial enlarged view showing a storage cable release mechanism of embodiment 4 of the deployable antenna reflecting mirror according to the present invention.

FIG. 8 is a partial enlarged view showing a storage cable release mechanism of a fifth embodiment of the deployable antenna reflector according to the present invention.

FIG. 9 is a partial enlarged view showing the storage cable release mechanism of the embodiment 6 of the deployable antenna reflecting mirror according to the present invention.

FIG. 10 is a partially enlarged view showing the storage cable release mechanism of Embodiment 7 of the deployable antenna reflecting mirror according to the present invention.

FIG. 11 is a partial enlarged view showing the storage cable release mechanism of the eighth embodiment of the deployable antenna reflecting mirror according to the present invention.

FIG. 12 is a partially enlarged view showing the storage cable release mechanism of the ninth embodiment of the deployable antenna reflecting mirror according to the present invention.

FIG. 13 is a partially enlarged view showing the storage cable release mechanism of Embodiment 10 of the deployable antenna reflecting mirror according to the present invention.

FIG. 14 is a partially enlarged view showing the storage cable release mechanism of the eleventh embodiment of the deployable antenna reflecting mirror according to the present invention.

FIG. 15 is a partially enlarged view showing the storage cable release mechanism of Embodiment 12 of the deployable antenna reflecting mirror according to the present invention.

FIG. 16 is a partially enlarged view showing the storage cable release mechanism of the thirteenth embodiment of the deployable antenna reflecting mirror according to the present invention.

FIG. 17 is a partially enlarged view showing the storage cable release mechanism of Embodiment 14 of the deployable antenna reflecting mirror according to the present invention.

FIG. 18 is a partial enlarged view showing the storage cable release mechanism of the embodiment 15 of the deployable antenna reflecting mirror according to the present invention.

FIG. 19 is a partially enlarged view showing the storage cable release mechanism of Embodiment 16 of the deployable antenna reflecting mirror according to the present invention.

FIG. 20 is a partially enlarged view showing the storage cable release mechanism of Embodiment 17 of the deployable antenna reflecting mirror according to the present invention.

FIG. 21 is a partially enlarged view showing the storage cable release mechanism of the eighteenth embodiment of the deployable antenna reflecting mirror according to the present invention.

FIG. 22 is a partially enlarged view showing the storage cable release mechanism of the nineteenth embodiment of the deployable antenna reflecting mirror according to the present invention.

FIG. 23 is a partially enlarged view showing the storage cable release mechanism of Embodiment 20 of the deployable antenna reflecting mirror according to the present invention.

FIG. 24 is a partial enlarged view showing the storage cable release mechanism of Embodiment 21 of the deployable antenna reflecting mirror according to the present invention.

FIG. 25 is a partially enlarged view showing the storage cable release mechanism of Embodiment 22 of the deployable antenna reflecting mirror according to the present invention.

FIG. 26 is a partially enlarged view showing the storage cable release mechanism of Embodiment 23 of the deployable antenna reflecting mirror according to the present invention.

FIG. 27 is a partial enlarged view showing the storage cable release mechanism of Embodiment 24 of the deployable antenna reflecting mirror according to the present invention.

FIG. 28 is a diagram showing a stored state and a deployed state of a conventional deployable antenna reflector.

FIG. 29 is a diagram showing a state in which a conventional deployable antenna reflecting mirror is being deployed.

[Explanation of symbols]

1 metal mesh, 2 cable, 3 center hub,
4 deployment ribs, 5 deployment hinges, 6 storage cables, 7
Storage cable release mechanism, 8 flat springs, 9 stacked leaf springs, 10 torsion coil springs, 11 deformed torsion coil springs, 12 spiral springs, 13 torsion bar springs, 1
4 pin mount, 15 taper chuck, 16 through hole, 17 shear hook, 18 elastic hook,
19 rubber bush, 20 ball end, 21 diaphragm, 22 hook, 23 crimp terminal, 24 base,
25 leaf spring, 26 adjusting mechanism, 27 elastic member, 28
Claw, 29 terminal, 30 holder, 31 opener,
32 heater, 33 cutter, 34 spring, 35 cutter lock, 36 elastic cutter, 37 terminal plate,
38 switch, 39 power supply, 40 electric circuit, 41
Force switch, 42 plate, 43 adhesive tape, A
Storage cable tension.

Claims (21)

[Claims] 1. A metal mesh that constitutes a radio wave reflection surface of an antenna, a cable that holds the shape of the antenna, the metal mesh and the cable are unfolded, and then unfolded. After unfolding, the metal mesh and the cable network are unfolded. In a deployable antenna reflector having a rib, a deploying hinge for deploying the deploying rib, and a center hub for fixing the deploying hinge, a storage cable having one end for holding the cable attached to the cable, provided on the center hub When the antenna reflector is stored, the other end of the storage cable is discretely fixed to the center hub, and when the antenna reflector is deployed, a force in the deployment direction is applied to the storage cable as the deployment ribs are deployed. Storage cable release mechanism that sequentially releases the other end of the storage cable from the center hub A deployable antenna reflector, comprising: 2. The storage cable release mechanism is composed of a flat plate spring, a stack leaf spring, a coil spring, a torsion coil spring, a spiral coil spring, or a torsion bar spring, and an annular portion provided at the other end of the storage cable is fixed through the spring. 2. The annular portion of the storage cable is sequentially released from the center hub by utilizing elastic deformation of the spring in the order in which a force is applied to the storage cable in the developing direction. Deployable antenna reflector. 3. The storage cable release mechanism comprises a deformed torsion coil spring in which both ends of a torsion coil spring are symmetrically bent and crossed, and an annular portion provided at the other end of the storage cable is fixed through the deformed torsion coil spring,
2. The annular portion of the storage cable is sequentially released from the center hub by utilizing the elastic deformation of the deformable torsion coil spring in the order in which a force is applied to the storage cable in the developing direction. Deployable antenna reflector. 4. The storage cable release mechanism is composed of a flat plate spring which is uniaxially rotatable and pin-coupled to the center hub, and an annular portion provided at the other end of the storage cable is fixed through the flat plate spring. 2. The expansion according to claim 1, wherein the annular portion of the storage cable is sequentially released from the center hub by utilizing the elastic deformation of the flat spring in the order in which a force is applied to the storage cable in the expansion direction. Type antenna reflector. 5. The storage cable release mechanism comprises an elastic hook attached to one side of a through hole formed in the center hub, and an annular portion provided at the other end of the storage cable is fixed through the elastic hook. The force in the developing direction applied to the storage cable acts on the elastic hook as a shearing force, and the storage cable is sequentially released from the center hub in the order in which the elastic hook is elastically deformed. Deployable antenna reflector. 6. The storage cable release mechanism is attached to the center hub, has a hole smaller than the outer diameter of a ball provided at the other end of the storage cable, and supports the ball through the hole. A rubber bush is used, and when unfolded, the balls of the storage cable are sequentially released from the rubber bush by utilizing the elastic deformation of the rubber bush in the order in which a force in the deployment direction is applied to the storage cable by the deployment of the deployment rib. The deployable antenna reflector according to claim 1. 7. The storage cable release mechanism is composed of a diaphragm that is attached to the center hub and has a hook for passing an annular portion provided at the other end of the storage cable. The expandable antenna reflector according to claim 1, wherein the diaphragm is elastically deformed in the order in which a force in the expansion direction is applied to the storage cable, and the storage cable is sequentially released from the hook. 8. The storage cable release mechanism is constituted by a taper chuck that is attached to the center hub and holds the other end of the storage cable by sandwiching it, and at the time of deployment, expansion that is applied to the storage cable by expansion of the expansion ribs. 2. The deployable antenna according to claim 1, wherein the holding portion of the taper chuck is released in the order in which the force in the direction exceeds the frictional force of the holding portion of the taper chuck, and the storage cable is sequentially released from the center hub. Reflector. 9. The storage cable release mechanism is configured by a shear hook that is connected to the other end of the storage cable and is provided so as to cover one of the through holes discretely formed in the center hub. The force in the direction of expansion applied to the storage cable by the expansion of the expansion rib acts as a shearing force on the shear hook, and sequentially releases the storage cable from the center hub in the order of shear failure of the shear hook. The deployable antenna reflector according to claim 1. 10. The storage cable release mechanism comprises a through hole discretely formed in the center hub, and a crimp terminal larger than a through hole crimped at an end of the storage cable passing through the through hole, At the time of unfolding, the unfolding of the unfolding ribs causes the unfolding direction of the unfolding force to exceed the holding force of the caulking, the unfolding of the unfolding cable from the crimp terminal, and the releasing of the unfolding cable from the center hub. The deployable antenna reflector according to claim 1. 11. The storage cable release mechanism is composed of a base and a leaf spring that are attached to the center hub and sandwich the storage cable, and a force in the expansion direction applied to the storage cable by the expansion of the expansion rib at the time of expansion. The storage cable is released by sliding between the base and the leaf spring in order of exceeding the frictional force sandwiching the storage cable, and the storage cable is sequentially released from the center hub. Deployable antenna reflector. 12. The storage cable release mechanism comprises a base attached to the center hub for holding and holding the storage cable, a leaf spring, and an adjusting mechanism for adjusting the pressing force of the leaf spring. Adjust the frictional force holding and holding the storage cable with a necessary amount, and the force in the expansion direction applied to the storage cable due to the expansion of the expansion rib during expansion expands and holds the storage cable. The deployable antenna reflector according to claim 1, wherein the storage cable is released by sliding between the base and the leaf spring in the order in which the friction force is exceeded, and the storage cable is sequentially released from the center hub. . 13. An elastic member fixed to both ends of the storage cable release mechanism in the center hub by being bent in a direction opposite to a developing direction, and the elastic member is provided on the elastic member. It consists of a hook that is closed when bent in the opposite direction and opened when bent in the unfolding direction, and a terminal crimped to one end of the storage cable held by the hook. The elastic member expands in the order in which the force in the expansion direction applied to the storage cable exceeds the force necessary for the elastic member to move from the state in which the elastic member is bent in the direction opposite to the direction in which the elastic member is bent to the expansion direction. The deployable antenna according to claim 1, wherein the hook is opened and the hook is opened to release the terminal to sequentially release the storage cable from the center hub. Reflector. 14. The storage cable release mechanism comprises an elastic hook attached to the center hub, a holder for restraining elastic deformation of the elastic hook, and a shape memory alloy opener for releasing the holder at high temperature. The annular portion provided at the other end of the storage cable is fixed through the elastic hook, the holder is released by warming the opener immediately before the expansion, and the expansion force applied to the storage cable by the expansion of the expansion rib causes the elastic hook to expand. The deployable antenna reflector according to claim 1, wherein the storage cable is released from the center hub in order in which the elastic hooks are elastically deformed to act as a shearing force. 15. The storage cable release mechanism comprises an elastic hook attached to the center hub, a holder for restraining elastic deformation of the elastic hook, a shape memory alloy opener for releasing the holder at high temperature, and an opener forcibly. A heater that heats the storage cable, the annular portion provided at the other end of the storage cable is fixed through the elastic hook, and immediately before deployment, the opener is forcibly warmed by the heater to release the holder, and the deployment rib The force in the direction of expansion applied to the storage cable due to expansion acts on the elastic hook as a shearing force, and the storage cable is sequentially released from the center hub in the order in which the elastic hook is elastically deformed. Deployable antenna reflector. 16. The storage cable release mechanism is composed of a cutter lock attached to the center hub and fixed to an end of the storage cable, a cutter held by the cutter lock and a spring for pushing out the cutter, and expanded. Sometimes the expansion of the expansion ribs applies a force in the expansion direction to the storage cable, which causes the cutter lock to rotate and the holding of the cutter to be released,
The deployable antenna reflector according to claim 1, wherein the cutter is pushed out by the spring to cut the storage cable and sequentially release the storage cable from the center hub. 17. The storage cable release mechanism comprises a pair of elastic cutters attached to the center hub so as to face each other up and down, and a terminal plate fixed to the tip of the storage cable passing through the cutters. ,
At the time of unfolding, the unfolding of the unfolding ribs applies a force in the unfolding direction to the storage cable, and the terminal plate pushes the elastic cutter in the unfolding direction to elastically deform and cut the storage cable to sequentially release it from the center hub. The deployable antenna reflector according to claim 1. 18. A switch and a power supply for fixing the storage cable release mechanism to the center hub, which is fixed to the tip of the storage cable and is kept open by a spring, a heater wound around the storage cable, the switch, and the power supply. , An electric circuit connecting the heaters, and at the time of expansion, a current flows through the electric circuit in the order that the force applied to the storage cable in the expansion direction by the expansion of the expansion rib exceeds the force of the spring to heat the heater. 2. The deployable antenna reflector according to claim 1, wherein the storage cable is cut by and is sequentially released from the center hub. 19. A redundant switch that can be forcibly opened / closed in parallel with the switch is installed in the electric circuit of the storage cable release mechanism, and if the switch does not operate normally at the time of deployment, the switch is not operated from the outside. 19. The deployable antenna reflector according to claim 18, wherein the redundant switch can be closed by operation to release the storage cable. 20. The storage cable release mechanism is constituted by a thin plate which is attached to the center hub, connects one end of the storage cable, and has cuts on both sides of the connection point to make it easy to break. The plate is broken from the cut portion in the order in which the force in the expanding direction applied to the storage cable by the expansion of the expansion rib exceeds the breaking strength of the plate, and the storage cable is sequentially released from the center hub. Item 1. The deployable antenna reflector according to Item 1. 21. The storage cable release mechanism is composed of an adhesive tape that is joined to one end of the storage cable and is attached to the center hub, and is arranged in a direction of expansion applied to the storage cable by expansion of the expansion rib during expansion. The deployable antenna reflector according to claim 1, wherein the adhesive tape is peeled off in the order in which the force exceeds the adhesive force of the adhesive tape, and the storage cable is sequentially released from the center hub.