JPH10135729A - Cable film surface support method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust a cable film surface soft structure into a desired shape by placing the cable film surface attachment adjustment devices having the three-dimensional translation freedom degrees at plural attachment parts of the cable film surface soft structure and a truss and performing the threedimensional fine adjustment of the attachment position to the truss. SOLUTION: When a cable film surface attachment/adjustment mechanism 11 is moved to the center part of a film surface 9a, a driver is engaged with a screw 16a of a slide part 13 and the screw 16a is turned clockwise. When the screw 16a is turned counterclockwise, the part 13 slides farther from the center part of the surface 9a and the tension of a cable film surface soft structure 9 is increased. When the position of the mechanism 11 is vertically adjusted, the driver is engaged with a groove 18 of a screw 17a of an attachment part 17. Then a support board 17a falls and rises when the screw 17b is turned clockwise and counterclockwise respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supporting a flexible truss structure on a truss, in which a cable and a wrapping surface form a predetermined shape, and an apparatus directly used for carrying out the method.

[0002]

2. Description of the Related Art A typical large-sized antenna mounted on a communication satellite to form a reflecting mirror surface for a satellite-mounted mesh antenna is a typical example of this kind of flexible cable membrane structure. This type of large antenna is folded small and stored in a rocket fairing, and is deployed on a geosynchronous orbit by itself to form an antenna mirror surface of a desired diameter. Is generally supported by trusses.

FIG. 5 shows a conventional truss to which a cable surface flexible structure of this kind is attached. A truss 1 forming a truncated hexagonal pyramid-shaped frame has a lower rod-like shape forming each side of a bottom surface 2. Member 3 and upper bar-shaped member 5 constituting each side of upper surface 4
And a peripheral-side rod-shaped member 7 constituting the ridge of the side surface 6. The ends of the upper, lower and peripheral-side rod-shaped members adjacent to each other are rotatably connected by hinges 8. The hinge 8 comprises a revolute or spherical hinge mechanism depending on its position.

[0004] Some of the peripheral rod members 7 are
Is capable of being expanded and contracted so that it can be stored and deployed, or slidable with respect to a hinge 8 that connects the peripheral rod 7 and the lower rod 3. A hexagonal flexible cable membrane structure 9 is provided on the upper surface 4 of the truss 1 so as to extend parallel to the upper surface 4, and each corner of the flexible cable membrane surface 9 is connected via an attachment mechanism 10. It is attached to the corresponding hinge 8.

The flexible cable membrane surface structure 9 has a membrane surface 9a and a cable 9b, and the overall shape is finely adjusted by adjusting the length of the cable 9b. By this fine adjustment, the overall shape of the cable membrane flexible structure 9 can be made close to a desired shape. FIG. 6 shows an enlarged view of the mounting mechanism 10. The mounting mechanism 10 has a flexible cable membrane surface structure 9.
And a screw 10b screwed to the fixed node 10a.

The screw 10b is formed of a bolt shaft that is screwed into the screw hole extending in the axial direction of the fixed node 10a, protrudes from the lower surface of the fixed node 10a, and can be screwed into the screw hole of the hinge 8. The fixed node 10a is fixed to the hinge 8 by screwing a screw 10b to the hinge 8.

[0007]

In the above conventional example, a fixed node 10a constituting an attachment mechanism 10 for attaching the flexible cable membrane surface structure 9 to the truss 1 is fixed to a hinge 8 constituting a part of the truss 1. Therefore, when the manufacturing error of the truss 1 is large, or when the shape of the deployed state of the truss is greatly distorted from the shape based on the design value under some load condition such as an external force being applied due to the combination of a plurality of trusses, There is a possibility that the cable membrane flexible structure 9 designed and manufactured in this manner cannot be attached to the truss 1. Alternatively, even if attachment is possible, the shape of the flexible cable membrane surface structure 9 may not be adjusted thereafter.

The main objects to be solved by the present invention are as follows. That is, a first object of the present invention is to provide a cable membrane surface supporting method and a cable membrane surface flexible structure that can have a predetermined shape even when the shape of a truss is distorted from a shape based on a design value for some reason. No device is provided.

A second object of the present invention is to provide a method and an apparatus for supporting a cable membrane surface which can adjust the shape of the flexible cable membrane surface even after being attached to a truss and deployed.

A third object of the present invention is to provide a cable membrane surface supporting method and apparatus for attaching a flexible cable membrane surface structure to a truss via a cable membrane surface adjustment mounting means capable of moving up and down, moving forward and backward, and rotating freely. Is to be provided.

[0011] Other objects of the present invention will become apparent from the description and drawings, particularly from the appended claims.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a flexible cable membrane surface structure and a flexible cable membrane surface structure so that a plurality of mounting portions of a truss can adjust a translation position. By having the cable membrane surface adjustment attachment means (mechanism) having three-dimensional translational freedom in a plurality of attachment portions of the truss, a manufacturing error is large, or an external force is applied because a plurality of similar trusses are combined. Even when the shape of the deployed truss has an error from the design value, fine adjustment of the mounting position on the truss three-dimensionally to adjust the flexible structure of the cable membrane surface that would otherwise be impossible to adjust to the desired shape It is possible, and when adjusting the shape of the cable membrane surface flexible structure, the cable membrane surface adjustment mounting means (mechanism)
Can be adjusted, so that the shape of the more flexible cable membrane surface flexible structure can be formed with fewer adjustments.

[0013] More specifically, in order to solve the above-mentioned problems, the object can be achieved by adopting the following novel characteristic methods or means of the present invention.

That is, a first feature of the method of the present invention is that a truss configured such that the ends of a plurality of rod-shaped members are hingedly connected to each other so as to be foldable and expandable has a cable and a membrane surface and is determined by a combination of the cable. In attaching the cable membrane surface structure that forms the cable membrane surface of the shape, in one or both directions of a direction substantially perpendicular to the cable membrane surface and a direction substantially parallel to the cable membrane surface via the cable membrane surface adjustment mounting means. An object of the present invention is to adopt a configuration of a cable membrane surface supporting method which is adjusted by adjusting the optimum height of the mounting position and the optimum tension of the cable while moving by a required amount, and deployed and stretched.

According to a second feature of the method of the present invention, the required amount of movement in the substantially parallel direction in the first feature of the method of the present invention is such that the movement of the cable film toward or away from the center of the cable membrane surface is performed. The present invention resides in the adoption of the structure of the cable membrane surface supporting method which is a moving method.

According to a third aspect of the method of the present invention, a configuration of a cable membrane surface supporting method in which the adjustment of the mounting position in the first or second aspect of the method of the present invention is set with respect to the hinge. In hiring.

A first feature of the device of the present invention is that it has a foldable and deployable truss composed of a plurality of rod-shaped members whose ends are hinged to each other, a cable and a membrane surface, and a predetermined combination of the cable and the membrane. A cable membrane flexible structure that forms a cable membrane surface of a shape; and a direction substantially perpendicular to and substantially parallel to the cable membrane surface for coupling the truss and the cable membrane flexible structure. And a cable membrane surface support device having a cable membrane surface mounting adjustment mechanism capable of adjusting the position in the direction of (1).

A second feature of the device of the present invention is that the cable membrane surface mounting and adjusting mechanism in the first feature of the device of the present invention adjusts a slide portion slidable with respect to the hinge and a slide portion. The present invention resides in adoption of a configuration of a cable membrane surface supporting device having a mounting portion which is mounted at a high degree.

According to a third feature of the device of the present invention, in the second feature of the device of the present invention, the mounting portion has a vertical thread portion for adjusting a position in a direction perpendicular to the cable membrane surface. The present invention lies in the adoption of the configuration of the cable membrane surface supporting device.

A fourth feature of the device of the present invention is that, in the second or third feature of the device of the present invention, the slide portion adjusts a position of a parallel screw portion in a direction parallel to the cable membrane surface. The present invention resides in the adoption of the configuration of the cable membrane surface supporting device.

A fifth feature of the device of the present invention is that the parallel thread portion in the fourth feature of the present device is provided between the slide portion and the hinge. In the configuration adoption.

A sixth feature of the device of the present invention is that the vertical thread portion in the fourth or fifth feature of the device of the present invention is provided on the cable membrane surface support provided over the slide portion and the mounting portion. The configuration of the device is adopted.

A seventh feature of the device of the present invention is that the slide portion in the fourth, fifth or sixth feature of the device of the present invention is slidable on a guide rail fixed to the upper surface of the hinge. The present invention resides in adopting a configuration of a certain cable membrane surface supporting device.

An eighth feature of the device of the present invention is that, in the fifth, sixth or seventh feature of the device of the present invention, the parallel thread portion is formed on an upper surface of the guide rail; The present invention resides in the configuration adoption of a cable membrane surface supporting device comprising a bolt shaft rotatably attached to the slide portion and capable of meshing with the linear tooth profile.

According to a ninth feature of the device of the present invention, the vertical screw portion in the sixth, seventh or eighth feature of the device of the present invention is characterized in that the vertical screw portion is formed by a screw hole formed in the slide portion and the mounting portion. And a height adjusting screw that can be screwed into the screw hole of the slide portion.

A tenth feature of the device of the present invention resides in that the cable membrane according to the first, second, third, fourth, fifth, sixth, seventh, eighth or ninth feature of the device of the present invention. In the configuration adoption of the cable membrane surface supporting device, a direction substantially parallel to the surface is a direction approaching or separating from a center portion of the cable membrane surface.

According to the first feature of the method and apparatus of the present invention, when the shape of the truss is distorted from the shape based on the design value for some reason, one of the direction perpendicular to or parallel to the cable membrane surface or By adjusting the position of the cable membrane surface attachment adjusting mechanism (means) on both sides, the cable membrane surface flexible structure can be formed into a predetermined shape.

In the third or fourth aspect of the device of the present invention, when the cable membrane surface mounting / adjusting mechanism has a vertical thread portion and a horizontal thread portion, the cable membrane surface is adjusted by utilizing these thread portions. Adjust the position of the mounting adjustment mechanism.

According to the fifth or sixth aspect of the device of the present invention, when the cable membrane surface mounting adjustment mechanism has a slide portion and a mounting portion, the cable film surface mounting adjustment mechanism is mounted to the slide portion by using vertical and horizontal screw portions. The position of one or both of the sections is adjusted to adjust the position of the cable membrane surface mounting adjustment mechanism.

According to the seventh, eighth, or ninth feature of the device of the present invention, when a bolt shaft and an adjusting screw are provided, the sliding portion slides by rotating the bolt shaft, and the adjusting screw is turned. This makes it possible to adjust the height of the mounting portion.

In the second or third aspect of the method of the present invention and the second or tenth aspect of the apparatus of the present invention, the position of the cable membrane surface adjusting mechanism in the parallel direction with respect to the cable membrane surface is determined. It is adjusted so as to approach or separate from the center.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of an apparatus and an example of a method according to an embodiment of the present invention will be described with reference to the drawings. (Example of Apparatus) FIG. 1 shows an embodiment of a cable membrane surface supporting apparatus according to an example of the present apparatus, and is different from the conventional truss with flexible cable membrane surface structure shown in FIG. The only difference is the mounting mechanism. Therefore, the same or corresponding parts as in the conventional example shown in FIG.

In this example of the apparatus, as shown in FIG.
As a means for attaching the flexible cable membrane surface structure 9 to the hinge 8 of the truss 1, a cable membrane surface mounting adjustment mechanism 11 is used. FIG. 2 is an enlarged view of the cable membrane surface attachment adjustment mechanism 11, and the cable membrane surface attachment adjustment mechanism 11 includes:
A guide rail 12 having a rectangular cross section fixed to the upper surface of the hinge 8 substantially parallel to the film surface 9a, a columnar slide portion 13 slidable over the guide rail 12, and attached to the slide portion 13 to be adjustable in height. Mounting portion 17.

The guide rail 12 extends toward the center of the film surface 9a. On the upper surface thereof, uneven tooth shapes 12a extending in a direction substantially perpendicular to the longitudinal direction of the guide rail 12 are formed in a rack shape. Many are formed in parallel. The teeth 12a are linearly extended in a line in the longitudinal direction of the guide rail 12.

The sliding portion 13 has a pair of legs 14 at the lower part thereof facing each other. The protrusion 1 is on the inside of the leg 14.
The projection 14a is formed on the side surface of the guide rail 12 and slidably engages with a groove 12b extending in the longitudinal direction of the guide rail 12.

As shown in FIG. 3, the slide portion 13 has
A blind hole 15 extending in the radial direction is formed, and a pinion-like screw 16 composed of a bolt shaft is rotatably inserted into the blind hole 15. On one end surface of the screw 16 is formed a groove 16a into which a tool such as a screwdriver can be freely engaged. The lower peripheral surface of the blind hole 15 is open to the bottom surface of the slide portion 13, and a part of the peripheral surface of the screw 16 is exposed from this opening, so that the screw 16 can be engaged with the tooth shape 12 a of the guide rail 12.

The mounting portion 17 comprises a support board 17a and a screw 17b. The screw 17b is rotatably penetrated through the support board 17a, and a groove 18 is formed on the upper end surface thereof so that a tool such as a driver can be engaged with the screw. Have been. As shown in FIG.
7b is formed on the support plate 17 in the circumferential direction.
a is slidably engaged with a circumferential concave portion 20 formed on the inner peripheral surface of a.

The screw 17b is screwed into a screw hole 21 extending in the axial direction of the slide portion 13. When the screw 17b is turned in the screwing direction, the support plate 17a is lowered, and when the screw 17b is turned in the opposite direction, the screw 17b is turned. The support board 17a rises.

(Example of Method) Next, an execution procedure of the example of the method applied to the example of the present apparatus will be described. If the truss 1 is distorted from the shape based on the design value for some reason, or if it is desired to bring the shape of the cable membrane flexible structure 9 closer to the desired shape as accurately as possible, the cable membrane surface mounting adjustment mechanism 11 is used.
Adjust the position of.

First, when it is desired to move the cable membrane surface adjusting mechanism 11 toward the center of the membrane surface 9a, a screwdriver (not shown)
6, and the screw 16a is turned clockwise in FIG. Then, the screw 16 becomes the guide rail 1
Because the second tooth form 12a meshes with the second tooth form 12a, the slide part 13 slides in a direction approaching the center of the membrane surface 9a. By moving the slide portion 13 in this direction, the tension of the cable membrane flexible structure 9 can be reduced.

Conversely, when the screw 16a is turned counterclockwise, the slide portion 13 slides away from the center of the film surface 9a. By moving the slide portion 13 in this direction, the tension of the cable membrane flexible structure 9 can be increased. By adjusting the position of the slide portion 13 in this manner, the tension of the flexible cable membrane surface structure 9 can be adjusted. However, this also enables the tension acting on the hinge 8 to be adjusted.

In order to adjust the position of the cable membrane surface attachment adjusting mechanism 11 in the vertical direction, a screwdriver (not shown) is engaged with the groove 18 of the screw 17b of the attachment part 17 and the screw 17b is turned. Turning the screw 17b in the clockwise direction lowers the support board 17a, and turning the screw 17b in the counterclockwise direction raises the support board 17a.

Although the guide rails 12 are provided in the above embodiment, they may be omitted. In this case, the hinge 8 is provided with a tooth profile, and the slide portion 13 is slidably attached to the hinge 8. It is needless to say that the present example of the apparatus and the example of the method can also be applied to the basic structure of a general building.

[0044]

As described above, according to the present invention, even when the shape of the truss is distorted from the shape based on the design value for some reason, the position of the cable membrane surface adjusting mechanism can be adjusted. The flexible structure of the cable membrane surface can be adjusted to a desired shape.

Further, since the cable membrane surface mounting mechanism which could not be adjusted conventionally can be adjusted as described above, the flexible structure of the cable membrane surface can be adjusted to a desired shape with a smaller number of adjustments. In addition, in the present invention, the position adjustment of the cable membrane surface mounting adjustment mechanism can be performed using the screw portion, so that the position adjustment can be easily and reliably performed.

Further, in the present invention, the position of the cable membrane surface adjusting mechanism in the direction parallel to the cable membrane surface is adjusted in a direction approaching or away from the center of the cable membrane surface, so that the cable membrane surface flexible structure is provided. Adjustment of the tension becomes easier.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an entire cable membrane surface supporting device according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of the cable membrane surface attachment adjusting mechanism in the same.

FIG. 3 is an enlarged perspective view of a slide unit in the above.

FIG. 4 is an enlarged perspective view showing a part of the mounting portion in the same manner.

FIG. 5 is a schematic view showing an entire conventional truss with a flexible cable membrane surface structure.

FIG. 6 is an enlarged perspective view showing an attaching mechanism of the cable membrane flexible structure in the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Truss 3, 5, 7 ... Bar member 8 ... Hinge 9 ... Cable membrane surface flexible structure 9a ... Film surface 11 ... Cable membrane surface mounting adjustment mechanism 12 ... Guide rail 13 ... Slide part 17 ... Mounting part 12a, 16, 17b , 21 ... screw part

Claims (13)

[Claims] 1. A cable membrane having a cable and a membrane surface on a truss configured to be folded and unfolded by hinge-joining the ends of a plurality of rod-shaped members to each other to form a cable membrane surface of a predetermined shape by a combination of the cables. At the time of mounting the surface structure, the optimum height of the mounting position while moving by a required amount in one or both directions substantially perpendicular to and substantially parallel to the cable film surface via the cable film surface adjustment mounting means. A cable membrane surface supporting method, comprising: adjusting the tension of the cable to an optimum degree of tension and deploying and stretching the cable. 2. The cable membrane surface according to claim 1, wherein the required amount of movement in the substantially parallel direction is a movement of approaching or moving away from the center of the cable membrane surface. Support method. 3. The cable membrane surface supporting method according to claim 1, wherein the adjustment of the attachment position is set with respect to the hinge. 4. A foldable and deployable truss comprising a plurality of bar-shaped members hinged to each other at an end, a cable and a film surface, and a cable film surface of a predetermined shape is formed by a combination of the cable. A cable membrane flexible structure; and a cable for connecting the truss and the cable membrane flexible structure, the position of which is adjustable in a direction substantially perpendicular to the cable membrane and in a direction substantially parallel to the cable membrane. A cable membrane surface support device, comprising: a membrane surface mounting adjustment mechanism. 5. The cable membrane surface mounting / adjusting mechanism, comprising: a slide portion slidable with respect to the hinge; and an attachment portion mounted on the slide portion so as to be adjustable in height. Item 5. A cable membrane surface supporting device according to item 4. 6. The cable membrane surface supporting device according to claim 5, wherein the attachment portion has a vertical thread portion for adjusting a position in a direction perpendicular to the cable membrane surface. 7. The cable membrane surface supporting device according to claim 5, wherein the slide portion has a parallel screw portion that adjusts a position in a direction parallel to the cable membrane surface. 8. The cable membrane surface supporting device according to claim 7, wherein the parallel thread portion is provided between the slide portion and the hinge. 9. The cable membrane surface supporting device according to claim 7, wherein the vertical thread portion is provided over the slide portion and the attachment portion. 10. The cable membrane surface supporting device according to claim 7, wherein the slide portion is slidable on a guide rail fixed to an upper surface of the hinge. 11. The parallel thread portion comprises: a linear tooth profile formed on an upper surface of the guide rail; and a bolt shaft rotatably attached to the slide portion and capable of meshing with the linear tooth profile. The cable membrane surface supporting device according to claim 8, 9 or 10, wherein: 12. The vertical screw portion comprises: a screw hole formed in the slide portion; and a height adjustment screw rotatably supporting the mounting portion and screwably screwable into the screw hole of the slide portion. The cable membrane surface supporting device according to claim 9, 10 or 11, wherein: 13. The apparatus according to claim 4, wherein the direction substantially parallel to the cable membrane surface is a direction approaching or separating from a central portion of the cable membrane surface. 8, 9, 1
13. The cable membrane surface support device according to 0, 11, or 12.