JPH01250545A - Expanded truss structure - Google Patents

Abstract

PURPOSE:To obtain a light-weight and compact structure by a method in which a rib is connected to the connectors of oppositely directed adjacent mandrels, the connectors are connected with an oblique part, and the connectors of mandrels directed in the same direction, the other ends of the rib, and the connectors are connected with wires. CONSTITUTION:A rib 12 excluding one to be free end of an expanded truss structure is connected to the connector 3 of oppositely directed adjacent mandrels 10. The connectors 3 of the mandrels 10 are connected with an oblique part 2 to form a skeleton. The connectors 3 of the mandrels 10 in the same direction, other ends of the rib 12 to be free end, and the connectors 3 and the other end of the rib 12 to be free end are connected with wires 13a. A stopper 16 on each mandrel 10 and the center of the wires 13a are connected with wires 13b. A light-weight expanded truss structure having high housing property can thus be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a lightweight deployable truss structure with high retractability.

[Conventional technology]

In recent years, the performance and reliability of space shuttles, Ariane rockets, etc. have improved, and economic benefits have been created for space utilization. In particular, large deployable antennas are indispensable for communications in mobile bodies such as ships and vehicles, and deployable truss structures for constructing these antennas have been actively developed. On the other hand, in terms of scientific applications, the deployment truss structure is an important development theme as the basic structure of the base, which is being planned to build a huge space base. This is because the deployable structure method is believed to be the most economical way to construct huge structures in space.

Figure 16 shows the above development truss structure as described in the American academic journal ``Engineering FEE TRAN8ACT ENGINEERING ONS ON ANTEN.
NA8 AJIDPROPAGAT ON JAP-1
This was shown in 7% No. 4 (1969). In a diagram showing a conventional deployment truss structure.

In the figure, (1) is a bent member that forms a triangular lattice on the upper and lower surfaces of this truss structure and can be bent at the center.

(2) is a diagonal member that supports the triangular lattice on the upper and lower surfaces, and (3) is a connector that connects the bent 19 member (the diagonal member (2)) with a pin.

Figure 1T is an enlarged view of part A surrounded by the dashed circle in Figure 16, where (4) is a web provided around the connector (3), the bent member (1) and the diagonal member ( 2) is pin-coupled with the connector (3).

Figure 18 is an enlarged view of part B surrounded by the broken line circle in Figure 16, showing details of the central bent part of the bent member (1), and (5) in Figure 0 is the central part. A rotatable hinge lever consisting of two plates connected with a pin.

(6) is a spiral spring that is attached to one base of the hinge lever (5) and rotates the hinge lever (5) in the direction in which the bent 19 member (1) is expanded; (78) and (7b) are the connecting pins that connect the member (1) and the hinge lever (5).
Pin that connects the blank member (1), (7c)
is a connecting pin that connects the bent 19 members (1) at the center.

The above structure is composed of a plurality of tetrahedrons made up of three bent 19 members (1), three diagonal members (2), and three connectors (3). Also called a face truss structure. FIG. 19 is a diagram showing the expansion truss structure in progress.

Next, the operation buttons will be explained. The above-mentioned structure, which was initially restrained by a holding cable (not shown) in its stored form, becomes movable by cutting the holding cable with a detonator or the like in response to a command from the ground, and the spring force button of the spiral spring (6) is activated. Start expanding. The unfolding is done by rotating the hinge leno < - (5) using the spring force of the spiral spring (6).
Stretch the member by rotating the connecting pin (7C). As the member (1) expands, the connectors (3) on the upper and lower surfaces spread radially and the unfolding progresses. song)
When member +1) extends linearly, the hinge lever (5)
The rotational torque generated by the spring force of the spiral spring (6) and the contact surface pressure on the bending surface of the bending member (1) are balanced, and the bending member (1) stops moving. This is the developed shape, and the structure is connected only by a triangular lattice. A triangular lattice is basically a rigid and stable structure, and conventionally this type of structure was considered to be a very rigid structure suitable for deployable antennas or structures for space bases.

(Problem to be solved by the invention) However, in reality, the conventional structure has a flexible structure that cannot even maintain its own shape because the connection points of each member are not concentrated at one point. This is limited to cases where the lattice is rigid and each member is connected at one point as shown in Figure 20, but in the conventional structure, this triangular lattice has many hinge connections as shown in Figure 21. Since the link structure has points, the rigidity is either insufficient or the link structure is unstable.In FIGS. 20 and 21, (8) is the basic member constituting the triangular lattice.

(9) is a pin joint that connects the basic member (8).

(The basic member (8) is
) is a connector that joins together.

As explained above, conventional deployable truss structures using bent members are fundamentally unstable structures.

There was a fatal problem in that the structure of the deployable antenna or the main body of the space base could not have the required rigidity.

The present invention has been made to solve the above-mentioned problems, and provides a deployable truss structure that is structurally stable in its deployed shape and has high machinability.

[Means to solve the problem]

The deployable truss structure according to the first aspect of the present invention has a mandrel which is coupled to a connector having a pin joint part at one end and has a stopper at the other end, and slides on the mandrel during deployment, and finally reaches the stopper. A main slide hinge that remains stationary, N (N is 4.6) ribs that are pin-coupled at one end to the main slide hinge and extend radially, and a synchronized slide that slides between one end of the mandrel and the main slide hinge. a hinge, N synchronous beams each having one end radially pin-coupled to the synchronous slide hinge and the other end pin-coupled to the N ribs, and between the main slide hinge, the synchronous slide and the Fuji. The mandrels are arranged in such a way that those that match are oriented in opposite directions, and the ribs other than the ribs that become the free ends of the deployable truss structure are connected by connectors of the mandrels that are oriented in opposite directions. A plurality of frames formed by connecting connectors on mandrels that are connected and facing oppositely to each other with diagonal members, and between the connectors on the mandrels that have the same orientation of the mandrels, and the above-mentioned deployable truss structure. Between the other ends of the ribs, which are free ends.

and a wire provided between the other end of the rib serving as the free end of the deployable truss structure and the connector and stretched between the connectors when the deployable truss structure is deployed, a stopper on the mandrel, and the The central portions of the wires are connected, and a wire is attached between the wires to be stretched between the two when the deployable truss structure is deployed.

The deployable truss structure according to a second aspect of the present invention includes a shaft having a connector having a pin joint at one end, an extension mechanism at the other end, a hinge connected to the extension mechanism, and a main hinge connected to the main hinge. Three ribs are connected at one end with a pin and extend radially, and the above-mentioned mandrels are arranged so that adjacent ones are in opposite directions, and the ribs are connected to each other except for the rib that becomes the free end of the deployable truss structure. A plurality of frames connected by connectors on mandrels in opposite directions, and in which connectors on the mandrels in opposite directions are joined by diagonal members.

between the connectors on the mandrels in which the mandrels have the same orientation, and between the other ends of the ribs which are the free ends of the deployable truss structure;
and between the other end of the rib that becomes a free ring of the deployable truss structure and the connector.

A first wire that is stretched between each wire when the deployment truss structure is deployed, and three wires that have one end attached to the main slide hinge and the other end stretched in a triangular shape around the main slide hinge. A second wire is attached to each intermediate point of the first wire, and is suspended when the deployable truss structure is deployed.

The deployable truss structure according to a third aspect of the present invention includes: - a shaft to which a connector having a pin joint portion is coupled in a phantom and an extension mechanism at the other end; a hinge coupled to the extension mechanism; and the main hinge. with four ribs that extend radially and are pin-coupled at one end.

A synchronous hinge is fixed to the middle of the mandrel, and one end is radially pin-coupled to the synchronous hinge.

and the other end is connected to each of the above four ribs by a pin.
The mandrels are arranged in such a way that those that match are oriented in opposite directions, and the ribs, except for the rib that becomes the free end of the deployable truss structure, are connected by connectors of the mandrels that are oriented in opposite directions. A plurality of frames formed by connecting connectors on mandrels that are connected and facing oppositely to each other with diagonal members, and between the connectors on the mandrels that have the same orientation of the mandrels, and the freedom of the above-mentioned deployable truss structure. between the other ends of the ribs that serve as ends, and between the other ends of the ribs that serve as free ends of the deployable truss structure and the connectors, and are stretched between each other when the deployable truss structure is deployed. It is attached with a wire.

The deployable truss structure according to the fourth aspect of the present invention has a mandrel in which a connector having a pin joint part is connected to one end and a stopper in the other end, and slides on the mandrel during deployment, and finally reaches the stopper. A main slide hinge that remains stationary, N (N is 3.4.6) ribs that extend radially with one end pin-coupled to the main slide hinge, and a slide between the connector of the mandrel and the main slide hinge. a synchronous slide hinge, one end of which is radially pin-coupled to the synchronous slide hinge, and the other end of which is radially pin-coupled to the synchronous slide hinge;
It is equipped with N quaternary beams each pin-coupled to the rib of the book, and a coil spring provided between the main slide hinge, the synchronous slide, and the Fuji, and the direction of the axle is such that adjacent ones are in opposite directions. The ribs, excluding the ribs that are arranged in the same direction and become the free ends of the deployable truss structure, are connected by connectors on the mandrels that are oriented in opposite directions, and the connectors on the mandrels that are oriented in opposite directions are connected by diagonal members. A plurality of frames, between connectors on the mandrels in which the mandrels are oriented in the same direction, between other ends of the ribs that are free ends of the deployable truss structure, and ribs that are the free ends of the deployable truss structure. A wire is added between the other end and the connectors, and is stretched between the connectors when the deployable truss structure is deployed.

The deployable truss structure according to a fifth aspect of the present invention includes a mandrel having a connector having a pin joint at one end and a stopper at the other end, and slides on the mandrel during deployment, and finally reaches the stopper. a stationary main slide hinge; N (3, 4, 6) ribs extending radially with one end pin-coupled to the main slide hinge; and a synchronous slide hinge that slides between one end of the mandrel and the main slide hinge; N main synchronous beams each having one end radially pin-coupled to the synchronous slide hinge and the other end pin-coupled to each of the N ribs, and provided between the main slide hinge and the synchronous slide hinge. a coil spring, the mandrels are arranged so that adjacent ones are in opposite directions, and the ribs other than the ribs that become the free ends of the deployable truss structure are connected by connectors of the mandrels oriented in opposite directions; The sub-synchronizing beam that connects the vicinity of the opposite end of the main slide hinge of the mandrel to the rib attached to the main slide hinge of the adjacent mandrel, and the mandrel between the above-mentioned synchronizing slide hinge and the connector slide in the opposite direction to the synchronizing slide hinge. a plurality of frames formed by connecting connectors on mandrels facing oppositely to each other with diagonal members, and connecting connectors on mandrels in which the orientation of the mandrels is the same; Between the other ends of the ribs that are the free ends of the unfolding truss structure.

A wire is attached between the other end of the rib, which is the free end of the deployable truss structure, and the connectors, and is stretched between the connectors when the deployable truss structure is deployed.

[Effect]

In the first aspect of the present invention, the wire stretched between the vertices of the N (N4゜6) pyramid produces compressive force on the ribs and achieves a force equilibrium state, so that the pin connection is achieved. The looseness in the part that was removed disappears and the basic module is N
Pyramids have a stable structure and can easily achieve high rigidity.

Furthermore, since each of the above N pyramids unfolds in synchronization, the reliability of the deployment increases, and the force of the spring increases.
No external energy is required to expand the N-pyramid.

In the second and third aspects of this invention.

N (N is 3.4.6) The wires stretched between the vertices that make up the pyramid produce compressive force on the ribs and achieve an equilibrium state of force, so there is no play in the pin-connected parts. The N-pyramid, which is the basic module, has a stable structure and can easily obtain high rigidity.

Furthermore, since each of the N-pyramids described above unfolds in synchronization with the extension mechanism, the reliability of the deployment increases.

In the fourth aspect of the present invention, since the synchronous slide hinge slides in the opposite direction to the main slide hinge, each of the N pyramids unfolds in synchronization.

In the fifth aspect of the present invention, it is possible to reduce the asynchrony caused by play in the portions connected by the pins to the sub-quaternary beam and the sub-synchronized slide hinge, and each N-pyramid develops in synchronization with each other more reliably.

〔Example〕

Figure 1 is the first example of this invention! (3
s), (3b) is a connector with a pin joint part, (3c) is a connector at the other end of the rib that becomes the free end of the deployable truss structure, and OI is a connector at the tip (3)
Adjacent mandrels are arranged with their axes opposite to each other. an is a main slide hinge that slides with the mandrel 01, az is a rib whose one end is radially pin-coupled to the main slide hinge a11 and can be expanded in a direction perpendicular to the axial direction of the mandrel;
The upper connector (3a) is oriented in the opposite direction, and is pin-coupled to the connector (3b) carried on the oppositely oriented shaft OI in contact with a. Further, the rib that becomes the free end of the deployable truss 07 structure is connected to a connector (3C).

(15a) is between the connectors (3a) attached to the tip of the shaft α1; (5b) is between the coupling connectors (3C) arranged at the free end of the deployable truss structure; and Peripheral connector (38
) and a connector (3C) disposed at the free end of the deployable truss structure, and is set to be pulled when the deployable truss structure is deployed.

(13b) is the stopper a6+ and the wire (1
The wire attached between the center parts of 3a) is set so as to be pulled when the deployable truss structure is deployed.

(2) is the connector (38) on the top side and the connector (38) on the bottom side.
b), (3c) A diagonal member that connects by pin connection.

A is a synchronous slide hinge that slides between the connector (3) and the shaft between the seven main slide hinges aD, and 09 is a synchronous slide hinge with one end connected to the synchronous slide hinge a4 with a pin, and the other end connected to the rib a.
2 shows a pin-coupled synchronous beam.

Fig. 2 is an enlarged view of part C in Fig. 1, where ae is a stopper that determines the bottom dead center of the main slide hinge (111) during deployment, and αη is a coil spring that provides the driving force to deploy the deployable truss structure of the present invention. , θ indicates the angle formed between the shaft an and the rib Q2, and is set to be around 90° when unfolded.

The unfolding operation of the unfolding truss structure constructed as in J.C. will be explained below. The deployable truss structure of the present invention has a connector 9 such as (38) on the mandrel 01 and a main sliding hinge (111) on the mandrel 01 when retracted.

Another connector 9, for example (3b), is connected to the other end of the rib a3 whose one end is pin-connected to the main slide hinge Qll.
A triangle with three vertices is collapsed.

The angle θ between the rib a2 and the shaft H shown in FIG. 2 is zero. Deployment is performed by pushing apart the space between the main slide hinge συ and the synchronous slide hinge α4) by the spring force of the coil spring an. When the distance between the main slide hinge 011 and the synchronous slide hinge α4 increases, the distance between the connector (3a) on the shaft 0I and the main slide hinge aυ increases, but the distance between the connector (3a) and the side Connector (
3b) is maintained at a constant length by the diagonal member (2), and the distance between the connector (3b) on the above side and the main slide hinge aυ
Since the distance between them is also maintained by the length of the rib 11z, the triangle formed by the three vertices expands, and the angle θ between the rib a2 and the mandrel increases. Above rib a2 and mandrel 0
When the angle θ formed by 1 increases, the connector (3b) on the above side
The distance between the main slide hinge αB and another connector 1, for example (3c), provided at the other end of another rib a2 whose one end is pin-coupled to the main slide hinge αB also increases. When the main slide hinge 01+ comes close to the stopper Oe, the upper surface side connectors (3a), the lower surface side connectors (5b), (3
C) Connector (38) between each other and at the free end on the top side
and the wire (13a) between the connector (3C) at the free end of the lower surface side, and the wire (15a) between the stopper 161 and the wire (15a)
The wires (13b) between them are stretched. The wires (13a) and (13b) continue to be stretched until the main slide hinge a11 hits the stopper aS. Since the stretched wires (13a) and (13b) press the connector (3) against the rib α2 side, there is no backlash at the pin joint, and the deployable truss structure has high rigidity.

FIG. 3 shows a diagram of the deployable truss structure of the present invention in the middle of deployment.

FIG. 4 shows a quadrangular pyramidal deployable truss structure in an expanded shape showing another embodiment of the first invention of the present invention, and FIG. 5 shows the deployable truss structure shown in FIG. 4 in the middle of deployment. The figure shows.

Note that the member connecting portion C is the same as that shown in Fig. 2, and in the second embodiment of the present invention, the shape of the deployable truss structure is changed from the hexagonal pyramid shown in Fig. 1 to a square pyramid, and its operation is as follows. It is similar to FIG.

FIG. 6 is a diagram showing an unfolded truss structure in an unfolded shape, showing an embodiment of the second aspect of the present invention.

(3a) and (3b) are connectors with pin joint parts.

(3C) is a connector provided at the other end of the rib that is the free end of the deployable truss structure, Q (l is a mandrel with a connector (3) attached to the tip, and adjacent mandrels have their axes in opposite directions. (11') is connected to an extension mechanism αn attached to the other end of the mandrel OI.Main hinge.

aX5 is a rib whose one end is radially pin-coupled to the main hinge aυ, and which can be expanded in a direction perpendicular to the axial direction of the mandrel, and which is opposite to the connector (3a) on the mandrel. , is pin-coupled to a connector (3b) attached on the adjacent oppositely oriented axle aI. Further, the rib that becomes the free end of the deployable truss structure is connected to a connector (3C).

(13R between the connectors (3a) attached to the tips of the cores P#an, (3t+) between each other, and between the connectors (3c) placed at the free ends of the deployable truss structure.

and a peripheral connector (3a) mounted on the mandrel and a connector (3a) disposed at the free end of the deployable truss structure.
c) A first wire added between the wires, which is set to be tensioned when the deployable truss structure is deployed.

(2) is the connector (3a) on the top side and the connector (5) on the bottom side.
b) and (5c) are diagonal members that connect multiple parts by pin connection.

Fig. 1 is an enlarged view of the 6th drawing part, where the motor fixed inside the extension mechanism a9, ■ is a pole screw directly connected to the rotating shaft of the motor αδ, and can is the nut shaft that engages with the pole screw holder. It is fixed to the end of a1. Extension mechanism a by the above motor brocade, pole screw ■ and oak) 011
Make 9. The middle point of the first wire 03 stretched in a triangular shape centering on the main hinge (11') and the main hinge (11')
11') A small soft second wire with a pivot leg that is stretched between them and applies tension to the first wire 〇 when deployed, θ indicates the angle between the stem at+ and the rib a'a. It is set to be around 90' when unfolded.

The unfolding operation of the borrowed deployable truss structure as described above will be explained below. The deployable truss structure of this invention is
When stored, the connector 8, for example (3a), on the mandrel al, the main hinge (11') on the mandrel, and the main hinge (11')
) has one end pin-coupled to the rib a3, and another connector 9 coupled to the other end of the rib a3, for example (3b).

The triangle with three vertices is collapsed, and the angle θ between the rib a't and the center NH shown in FIG. 2 is zero. Deployment is accomplished by rotating the rotation shaft of the motor shaft, rotating the pole screw clQ directly connected to the rotation shaft, and pushing up the mandrel frame that fixes the nut c211 and the nut c211.

When the mandrel (I [l) is pushed up, the mandrel (3)
8) and the raw hinge (11') increases,
The distance between the connector (3a) and the connector (3b) on the above side is maintained at a constant length by the diagonal member (2), and the distance between the connector (3b) on the above side and the main hinge (11') is maintained at a constant length. The distance between rib a
Since it is held at a length of X5, the above three vertices]
The triangle θ is a spreading force, and the angle θ formed by the rib α and the mandrel (1(l) increases. When the angle θ formed by the rib α2 and the mandrel OI increases, the connector (3b) on the side Another connector provided at the other end of another rib α2 whose one end is pin-coupled to the main hinge αυ.

For example (3c), the distance between also increases. Angle θ is 90
0 (when the upper surface side connectors (3a) are connected to each other).

The first wire 03 is stretched between the lower surface side connectors (3b) and (3c) and between the connector (3a) at the upper surface side free end and the connector (3C) at the lower surface side free end. Ru. The first wire 03 continues to be stretched until the angle θ reaches 90'. Stretched first wire 03
is to press the connector (3) against the rib aa side.

There is no play in the pin joints, and the deployable truss structure becomes highly rigid. Also, when deploying the deployable truss structure, the second
Since the wires 03 are also stretched at the same time, it is possible to ensure the tension of the first wire 03. In addition, each motor is controlled to be driven synchronously by an external controller not shown in the diagram, and when the motor rotates enough to reach the angle θ of 90°, the motor stops rotating due to the controller, and the energized state is maintained in the holding mode. It has a strong holding power.

Note that FIG. Q8 shows a diagram of the deployable truss structure of the second invention in the middle of deployment.

FIG. 9 is a diagram showing a quadrangular pyramidal expanded truss structure in an expanded shape showing an embodiment of the third aspect of the present invention.
3a) and (3b) are connectors having pin joint parts;
(3c) is a connector provided at the other end of the rib that is the free end of the deployable truss structure, aQ is a mandrel with a connector (3) attached to its tip, and adjacent mandrels are arranged with their axes opposite to each other. has been done. (11') t = the main hinge connected to the extension mechanism (+9) attached to the other end of the mandrel OI;
O2 is a rib whose one end is radially pin-coupled to the main hinge σ1 and can be expanded in a direction perpendicular to the axial direction of the mandrel, and the connector (38) on the mandrel Q1 is oriented in the opposite direction. It can be pin-coupled to the connector (3b) mounted on the oppositely oriented shaft aQ. Further, the rib that becomes the free end of the deployable truss structure is connected to a connector (3C).

(5b) between the connectors (3d) attached to the tips of the mandrels; (5b) between the connectors (3c) placed at the free ends of the deployable truss structure;

and a peripheral connector (3a) mounted on the mandrel and a connector (3a) disposed at the free end of the deployable truss structure.
c) With wires attached between each other.

It is set so as to be pulled when the above-mentioned deployable truss structure is deployed.

(14') is a synchronous hinge fixed in the middle of the mandrel (11o).

Connect one end of Q9 to the above synchronizing hinge (14') with a pin.

A quaternary beam is shown with the other end pinned onto the rib aZ.

Note that (21 is a diagonal member that connects the connector (68) on the upper surface side and the connectors (3b) and (3c) on the lower surface side by pin connection.

Figure 10 is an enlarged view of part E in Figure 9, where 0υ is the motor identified inside the extension mechanism (!9), ω is the pole screw directly connected to the rotating shaft on the motor side, and CD is the motor that is fitted into the pole screw. It is fixed to the end of the spindle 0 with a nut.The extension mechanism 09 is constituted by the motor a~, the pole screw @, and the oak) 1211.

It shows the angle formed by the θ-centering rod Q11 and the rib a2.

It is set so that it will be around 90 degrees when deployed.

The unfolding operation of the deployable truss structure constructed as described above will be explained below. The deployable truss structure of this invention is
When stored, the connector 9, for example (3a), on the mandrel o1, the main hinge (11') on the mandrel 01, and the main hinge (11') on the mandrel o1,
Another connector 1, for example (5b), is connected to the other end of the rib aZ, which has one end pin-connected to the other connector 1 (5b).

The triangle with three vertices is collapsed, and the angle θ between the rib 02 and the shaft aυ shown in FIG. 10 is zero. Deployment is performed by rotating the rotating shaft of the motor 0 ladder and the pole screw (2) directly connected to the rotating shaft, pushing up the shaft a1 that fixes the nut 21+ and the nut Qυ. As the distance between the main hinge (H') and the synchronous hinge (14') increases, the connector (38) on the axle H and the main hinge (11')
) increases, but the distance between the connector (3a) and the connector (3b) on the above side is maintained at a constant length by the diagonal member 12), and the distance between the connector (3b) on the above side increases. Main hinge above (
11') is also maintained at the length of the rib α2, the triangle formed by the three vertices expands, and the angle θ between the rib a2 and the shaft OI'I increases. When the angle θ between the rib 02 and the shaft (+1) increases, the connector (3b) on the side and the main hinge (Ill) are connected to another rib a2, which is connected at one end with a pin. The distance between the connectors 9, for example (3c), also increases.When the angle θ approaches 90', the distance between the upper surface side connectors (38) increases.
The wire 03 is stretched between the connectors (3b) and (3c) on the lower surface side, and between the connector (3a) at the free end on the upper surface side and the connector (3C) at the free end on the lower surface side. The wire 03 continues to be stretched until the angle θ reaches 90'. Since the stretched wire 03 presses the connector (3) against the rib σ2 side, there is no play in the pin joint (this makes the deployable truss structure highly rigid. Also, each motor is not shown in the figure). When the motor is controlled in a synchronous manner by an external controller, and rotates by an amount where the angle θ becomes 90°, the controller stops the motor from rotating, and the motor maintains the energized state in a holding mode and has a holding force.

In the above embodiment of the third invention, a quadrangular pyramidal deployable truss structure has been described, but the present invention can also be applied to triangular pyramidal or hexagonal pyramidal deployable truss structures.

FIG. 11 is a diagram showing a deployable truss structure in a deployed shape, showing an embodiment of the fourth aspect of the present invention.

(3a) and (3b) are connectors with pin joint parts.

(3c) is a connector provided at the other end of the rib that becomes the free end of the deployable truss structure, al is a mandrel with a connector (3) added to the tip, and adjacent mandrels have their axes opposite to each other. It is located. aυ is the main slide hinge that slides with the shaft 01, and Q3 has one end that is connected to the main slide hinge (11).
1 with a radially pin-coupled rib that can be expanded in a direction perpendicular to the axial direction of the mandrel.

The connector (3a) on the mandrel αa is in the opposite direction.

It is pin-coupled to a connector (3b) attached to the RI on the adjacent oppositely oriented mandrel OI. Further, the rib which becomes the free end of the deployable truss structure is connected to a connector (3c).

03 is a connector (3a) attached to the tip of the shaft H.
) between each other, (3b) between each other, and between the connectors (3c) arranged at the free ends of the deployable truss structure.

and a peripheral connector (3a) mounted on the mandrel and a connector (3a) disposed at the free end of the deployable truss structure.
C) with wires attached between each other.

It is set so as to be pulled when the above-mentioned deployable truss structure is deployed.

(2) is the connector (38) on the bottom side and the connector (38) on the top side.
A diagonal member that connects b) and (3c) with a pin connection.

A4 is a synchronous slide hinge that slides between the connector (3) and the shaft between the main slide hinge aυ, and a5 is connected to the synchronous slide hinge α4 with a pin at one end, and the other end is connected to a rib σ.
2 shows a pin-coupled synchronous beam.

FIG. 12 is an enlarged view of part F in FIG. 11, where 161 is a stopper that determines the bottom dead center of the main slide hinge aυ during deployment, αη is a coil spring that provides the driving force to deploy the deployable truss structure of the present invention, θ indicates the angle formed between the shaft 01 and the rib n2, and is set to be around 90' when unfolded.

The unfolding operation of the deployable truss structure configured as described above will be explained below. The deployable truss structure of this invention is
When retracted, the connector 0 (3a) on the mandrel 01 and the main slide hinge aυ on the mandrel al.

Another connector 0, for example (3b), is connected to the other end of the rib Q2 whose one end is pin-connected to the main slide hinge aD.
The triangle whose three vertices are , and is collapsed, and the angle θ between the rib o2 and the shaft o1 shown in Fig. 2 is zero. The main slide hinge α is expanded by the spring force of the coil spring an.
This is done by pushing out the space between D and the synchronous slide hinge α41. When the distance between the main slide hinge a11 and the synchronous slide top 2904 increases, the distance between the connector (3a) on the axle al and the main slide hinge an increases, but the distance between the connector (38) and the side Connector (3b)
The distance between the connector (3b) on the above side and the main slide hinge aυ is maintained at a constant length by the diagonal member (2), and the distance between the connector (3b) on the above side and the main slide hinge aυ is also maintained at the length of the rib a2. The triangle consisting of two vertices is wide, and the rib a2 and the mandrel (I
The angle θ formed by n increases. When the angle θ between the rib α2 and the shaft Ql increases, the connector (3b) on the side
Another connector 9 is provided at the other end of another rib α2 whose one end is pin-coupled to the main slide hinge αυ, for example (
3C) The distance between , also increases. When the main slide hinge aυ comes close to the stopper side, the lower surface side connector (3
a) The wire 03 between the upper side connectors (3b) and (3) is stretched. The wire 03 continues to be stretched until the main slide hinge aυ hits the stopper +Ifil. The wire 03 is the connector 03
Since the pin is pressed against the rib aa side, there is no looseness at the pin joint, and the deployable truss structure becomes highly rigid.

FIG. 13 shows a diagram of the deployable truss structure according to the fourth aspect of the present invention in the middle of deployment.

In the embodiment of the fourth aspect of the invention, a triangular pyramid-shaped deployable truss structure is shown, but a quadrangular pyramid or a hexagonal pyramid can be similarly applied.

FIG. 14 is a diagram showing a triangular pyramidal deployable truss structure in a deployed shape showing an embodiment of the fifth aspect of the present invention.
3a) and (3b) are connectors having pin joint parts;
(3c) is the connector at the other end of the rib that is the free end of the deployable truss structure, and Q (l is the connector at the tip (3
), with adjacent mandrels placed in opposite directions. aIJ is a main slide hinge that slides on the shaft a1; one end of CF is radially pin-coupled to the main slide hinge aυ.

A rib that can be expanded in a direction perpendicular to the axial direction of the mandrel, which is opposite to the connector (38) on the mandrel 01, and a connector attached to the adjacent mandrel OI in the opposite direction. (3b) is pin-coupled. It is also connected to the rib U connector (3C) which becomes the free end of the deployable truss structure.

03 is a connector (3
(31b) Between the connectors (3C) arranged at the free ends of the deployable truss structure.

and a peripheral connector (3a) electrically attached on the mandrel and a connector (3a) located at the free end of the deployable truss structure.
C) with wires attached Jl) between each other.

It is set so as to be pulled when the above-mentioned deployable truss structure is deployed.

(2) is the connector (3b) on the bottom side and the connector (3b) on the top side.
A diagonal member that connects a) and (3c) with a pin connection.

041 is a synchronous slide hinge that slides between the connector (3) and the center m between the main slide hinge aυ. Beam, 0θ is a stopper.

αη indicates a coil spring. (C) is a sub-synchronous slide hinge that slides the shaft al on the side far from α9 in the opposite direction to the synchronous slide hinge αa, and @ is a sub-synchronous beam that connects the sub-synchronous slide hinge opening to the rib σ2.

FIG. 15 is an enlarged view of part G in FIG. 14, where rm is a stopper that determines the bottom dead center of the main slide hinge αυ during deployment, and aD is a coil spring that provides the driving force to deploy the deployable truss structure of the present invention. θ indicates the angle formed between the shaft θ1 and the rib O3, and is set to be around 90° when unfolded.

The unfolding operation of the deployable truss structure configured as described above will be explained below. The deployable truss structure of this invention is
Connector 1 e.g. (38) on mandrel On when retracted and main sliding hinge αυ on said mandrel 01.

Another connector 1, for example (51:+
) , the triangle with three vertices is collapsed, and the second
The angle θ between the rib α2 and the shaft 01 shown in the figure is zero. The expansion is performed by pushing apart the main slide hinge αυ and the synchronous slide hinge α4 using the spring force of the coil spring 071. When the distance between the main slide hinge 0υ and the synchronous slide top 2204 increases, the distance between the connector (3 days) on the shaft θα and the main slide hinge 0υ increases, but the distance between the connector (3a) and the side Connector (3b
) is maintained at a constant length by the diagonal member (2), and the distance between the connector (3b) on the above side and the main slide hinge aυ is also maintained at the length of the rib α2. The triangle formed by the three vertices expands, and the above rib 02 and the mandrel a
The angle θ formed by 1 increases. When the angle θ between the rib α2 and the shaft H increases, the connector (3b) on the above side and another rib α2 provided at the other end of which one end is pin-coupled to the main slide hinge αυ. Connector 9 For example (3
c) The distance between , also increases. Above main slide hinge α
When υ comes close to stopper ae, the lower surface side connector (3
b) The wire αJ between the upper side connectors (3a) and (3c) is stretched. The main slide hinge aD of the wire 03 continues to be stretched over the stopper 061 at this time. The stretched wire 〇31 is connected to the connector (3;
Since it is pushed toward the rib α2 side, there is no backlash at the pin joint, and the deployable truss structure becomes highly rigid. Furthermore, the secondary synchronous slide hinge @ and the secondary synchronous beam c! 4,
A rib centered around a certain mandrel.

Synchronization can be achieved with ribs centered on adjacent mandrels in the same direction.

In the embodiment of the fifth aspect of the invention, a triangular pyramid-shaped deployable truss structure is shown, but the present invention can also be applied to a square pyramid or a hexagonal pyramid.

〔Effect of the invention〕

As described above, the first aspect of the present invention connects the wire stretched between the vertices of an N-pyramid, the stopper on the mandrel, and the central portion of the wire.

By providing wires that are stretched between the deployable truss structures when they are deployed, a structure with no backlash can be achieved, which has the effect of easily achieving high rigidity.

Further, in the second and third aspects of the present invention, since the main hinge is extended by the extension mechanism, each octagonal pyramid is expanded in synchronization, thereby improving the reliability of expansion.

Furthermore, since the fourth aspect of the present invention is provided with a synchronized slide hinge that slides in the opposite direction to the main slide hinge, there is an effect that the reliability of the diagonal expansion in which each N-pyramid is expanded synchronously is improved by 7jX.

Furthermore, since the @S invention of this invention is provided with a sub-synchronizing beam and a sub-synchronizing slide hinge, it is possible to reduce asynchrony due to play in the pin-connected parts, and each N pyramid is expanded in synchronization with each other. This has the effect of greatly improving the reliability of deployment.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram of a deployable truss structure after deployment showing one embodiment of the first invention of the present invention, and FIG.
FIG. 3 is a diagram showing the shape of the first embodiment of the invention during development, and FIG. 4 is a diagram showing another embodiment of the first invention of the invention. A conceptual diagram of the deployable truss structure after deployment showing an embodiment, FIG. 5 is a diagram showing the shape of the deployable truss structure in FIG. 4 during deployment, and FIG. 6 is an embodiment of the second invention of this invention. A conceptual diagram of a deployable truss structure after deployment showing an example, FIG. 1 is a diagram showing a member connection part in an embodiment of the second invention of this invention, and FIG. 8 is an embodiment of the second invention of this invention. FIG. 9 is a conceptual diagram of a deployable truss structure after deployment showing an embodiment of the third invention of the present invention, and FIG. The figure which shows the member connection part in an example. FIG. 11 is a conceptual diagram of a deployable truss structure after deployment showing an embodiment of the fourth invention of the present invention, and FIG. 12 is a diagram showing a member joining portion in the embodiment of the fourth invention of the present invention. 1st
FIG. 3 is a diagram showing the shape of the fourth embodiment of the present invention in the middle of deployment, and FIG. 14 is a conceptual diagram of the deployable truss structure after deployment, showing an embodiment of the fifth aspect of the present invention. @1
FIG. 5 is a diagram showing a member connecting portion in an embodiment of the fifth invention of the present invention, and FIG. 16 is a diagram of a conventional example in an exploded shape. FIG. 1T is a diagram showing a diagonal member coupling part in a conventional example, FIG. 18 is a diagram showing a mechanism of a bent member of a triangular lattice in a conventional example,
Figure 19 is a diagram showing the shape in the middle of development in the conventional example, Figure 20
The figure is a diagram of the physical model of the triangular lattice that was previously considered.
FIG. 1 shows an actual physical model diagram of a triangular lattice in a conventional example. In the figure, (1) is a bent member, and (2) is a diagonal member. (3) is connector, (4) is web, (5) is hinge lever, (6) is spiral spring, (7) is connecting pin, (8) is basic member, (9) is pin joint, 01 is mandrel ,συ
is the main slide hinge, (1)') Fi is the main upper hinge 02 is the rib, and 03 is the wire. (141 is a synchronous slide hinge, (14') is a synchronous hinge, OS is a synchronous beam, (161 is a stopper, (Iη is a coil spring, 0 ladder is a motor, (I9/I′i extension mechanism, I21 is a pole screw, Qη is a Nut,] is the second wire, (to) is the sub-synchronizing slide hinge, (2) is the sub-synchronizing beam. In the drawings, the same reference numerals indicate the same or equivalent parts.

Claims (5)

[Claims] (1) A mandrel to which a connector having a pin joint part is coupled at one end and a stopper at the other end, a main slide hinge that slides on the mandrel, one end of which is radially pin-coupled to the main slide hinge, N (N is 4, 6) ribs that can be expanded in directions perpendicular to the axial direction of the mandrel, a synchronous slide hinge that slides between one end of the mandrel and the main slide hinge, one end of which is the synchronous slide hinge; N synchronizing beams are radially pin-coupled to the shaft and the other ends are pin-coupled to the N ribs, respectively, and a coil spring is provided between the main slide hinge and the synchronization slide hinge. The ribs are arranged so that adjacent ones are in opposite directions, and the ribs, excluding the ribs that become the free ends of the deployable truss structure, are connected by connectors of the mandrels that are oriented in opposite directions, and on the mandrels that are oriented in opposite directions. a plurality of frames formed by connecting the connectors of the above with diagonal members, between the connectors on the mandrels in which the mandrels are oriented in the same direction, between the other ends of the ribs which are the free ends of the deployable truss structure, and Connecting the other end of the rib, which is the free end of the deployable truss structure, and the connectors, and when the deployable truss structure is deployed,
The present invention is characterized by comprising a wire that is stretched between the respective wires, and a wire that connects the stopper on the mandrel and the central portion of the wire and is stretched between the wires when the deployable truss structure is deployed. Deployment truss structure. (2) a mandrel to which a connector having a pin joint is connected at one end and an extension mechanism consisting of a motor, a pole screw, and a nut at the other end; a main hinge connected to the extension mechanism; one end connected to the main hinge; N (N is 3, 4, 6) ribs that are radially pin-coupled and can be expanded in directions perpendicular to the axial direction of the mandrel, and the mandrels are arranged in opposite directions. The ribs are arranged in such a manner that the ribs, excluding the rib that becomes the free end of the deployable truss structure, are connected by connectors on the mandrels that are oriented in opposite directions, and the connectors on the mandrels that are in opposite directions are connected by diagonal members. between a plurality of frames, the connectors on the mandrels having the same orientation, the other ends of the ribs, which become the free ends of the deployable truss structure, and the free ends of the deployable truss structure. A first wire is provided between the other end of the rib and the above-mentioned connectors, and is stretched between the two when the deployable truss structure is deployed; A second wire is attached to each intermediate point of the three first wires stretched in a triangular shape around the main slide hinge, and is stretched when the deployable truss structure is deployed. Features: Deployable truss structure. (3) A mandrel to which a connector having a pin joint is connected at one end and an extension mechanism consisting of a motor, a pole screw, and a nut at the other end, a main hinge connected to the extension mechanism, and one end connected to the main slide hinge. On the other hand, N (3, 4, 6) ribs are radially pin-coupled and can be expanded in directions perpendicular to the axial direction of the mandrel, a synchronous hinge fixed in the middle of the mandrel, and one end is one synchronization beam that is radially pin-coupled to the synchronization hinge and whose other end is pin-coupled to each of the N ribs;
The above-mentioned mandrels are arranged so that adjacent ones are in opposite directions, and the ribs other than the ribs that become the free ends of the deployable truss structure are connected by connectors of the mandrels in opposite directions, and the ribs are connected in opposite directions to each other. a plurality of frames formed by connecting connectors on mandrels with diagonal members; between the connectors on the mandrels with the mandrels oriented in the same direction; and between the other ends of the ribs that become the free ends of the deployable truss structure. and between the other end of the rib serving as the free end of the deployable truss structure and the connector, and a wire that is stretched between the connectors when the deployable truss structure is deployed. A deployable truss structure featuring: (4) a mandrel to which a connector having a pin joint part is coupled at one end and a stopper at the other end; a main slide hinge on which the mandrel slides; one end is radially pin-coupled to the main slide hinge; N (N is 3, 4, 6) ribs that can be expanded in directions perpendicular to the axial direction of the mandrel, and slide in the opposite direction to the main slide hinge between the connector of the mandrel and the main slide hinge. a synchronous slide hinge, one end of which is radially pin-coupled to the synchronous slide hinge, and the other end of which is pin-coupled to each of the N ribs; provided between the main slide hinge and the synchronous slide hinge; The above-mentioned mandrels are arranged in such a way that adjacent ones are oriented in opposite directions, and the ribs except for the rib that becomes the free end of the deployable truss structure are connected by connectors of the mandrels that are oriented in opposite directions. and a plurality of frames formed by connecting connectors on mandrels facing oppositely to each other with diagonal members, between the connectors on the mandrels having the same orientation of the mandrels, and a free end of the deployable truss structure. between the other ends of the ribs that become the free ends of the deployable truss structure, and between the other ends of the ribs that become the free ends of the deployable truss structure and the connectors, and are stretched between each other when the deployable truss structure is deployed. A deployable truss structure characterized by being equipped with a wire. (5) a mandrel to which a connector having a pin joint portion is coupled at one end and a stopper at the other end; a main slide hinge that slides on the mandrel; one end is radially pin-coupled to the main slide hinge; N (N is 3, 4, 6) ribs that can be expanded in directions perpendicular to the axial direction of the mandrel, a synchronous slide hinge that slides between one end of the mandrel and the main slide hinge, one end of which is the synchronous N main synchronous beams radially pin-coupled to the slide hinge and whose other ends are pin-coupled to the three ribs, and a coil spring provided between the main slide hinge and the synchronous slide hinge, The above-mentioned mandrels are arranged so that adjacent ones are in opposite directions, and the ribs other than the ribs that become the free ends of the deployable truss structure are connected by connectors of the mandrels in opposite directions, and the ribs are connected in opposite directions to each other. a plurality of frames formed by connecting connectors on a mandrel with diagonal members; a sub-synchronous slide hinge that slides on the mandrel between the synchronous slide hinge and the connector in a direction opposite to the synchronous slide hinge; The three sub-synchronizing beams are radially pin-coupled to the sub-synchronizing slide hinge, and the other ends are pin-coupled to N ribs, each of which is pin-coupled to a connector on the mandrel, and the mandrel has the same orientation. between the connectors on the mandrel that become A deployable truss structure characterized by comprising: a wire that is stretched between the deployable truss structures when the deployable truss structure is deployed.