JP5120074B2 - Structure composed of variable truss structure and method for moving panel member following movement of variable truss structure - Google Patents

Description

  The present invention relates to a structure constituted by a variable truss structure and a method of moving a panel member following the movement of the variable truss structure.

  An example of a variable truss structure is described in Patent Document 1. The variable truss structure includes a plurality of upper chord members joined in series by pin joining, a plurality of lower chord members arranged below the plurality of upper chord members and joined in series by pin joining, A variable truss structure including a pin joint portion of each upper chord member and a brace that obliquely joins between a pin joint portion of each lower chord member is provided between each pair of roof support frames supported by four posts. A roof membrane is stretched between the upper surfaces of the upper chord members of adjacent variable truss structures, and a roof that closes the upper openings of the plurality of variable truss structures is configured by the roof membrane.

In this case, the lower chord material of each variable truss structure is configured by connecting the extendable actuators in series, and by changing the overall length of the lower chord material by extending and contracting the actuators of each variable truss structure, The upper chord material rotates through the pin joint portion following the change in the overall length, the roof membrane is deformed following the movement of the upper chord material, and the entire roof can be changed to a desired shape.
JP 2004-197426 A

  By the way, in the variable truss structure configured as described above, a roof membrane made of a flexible material is stretched between adjacent variable truss structures, and the roof membrane is shaped into each variable truss structure. Therefore, there is a problem that the durability of the roof membrane is lowered due to repeated application of tensile force and compressive force to the roof membrane. Further, depending on the deformed shape of the roof membrane, the roof membrane may be slackened, resulting in a problem of deteriorating aesthetics, and a problem that rainwater, snow, etc. stay in the slack portion.

  The present invention has been made in view of the conventional problems as described above, and can move following the shape change of the variable truss structure without impairing the durability, and the aesthetic appearance is impaired by the changed shape. It is an object to provide a structure constituted by a variable truss structure that does not cause rainwater or snow to stay, and a method for moving a panel member following the variable truss structure in this structure. To do.

In order to solve the above problems, the present invention employs the following means.
That is, the structure constituted by the variable truss structure of the present invention is arranged in series with a plurality of upper chord members joined in series by pin joining, and is joined in series by pin joining. A plurality of variable truss structures each including a plurality of lower chord members and braces for obliquely joining between the pin joint portions of the upper chord members and the pin joint portions of the lower chord members, The structure of the truss structure is constituted by a variable truss structure in which the upper chord material at both ends of the truss structure is supported on the housing side, and the other variable truss structure adjacent to the upper portion of the upper chord material of one adjacent variable truss structure A plurality of panel members erected between the upper chord member and the upper chord member of the one variable truss structure and the upper chord member of the other variable truss structure. Both variable truss structure Following the movement of the upper chord members of the body, characterized by comprising a support means for movably supporting.

  According to the structure constituted by the variable truss structure of the present invention, the panel member laid between the upper chord members of both adjacent variable truss structures is adjacent to one of the variable truss structures via the support means. It is constructed between the upper part of the upper chord material and the upper part of the upper chord material of the other variable truss structure so that it can move following the movement of each upper chord material of both adjacent variable truss structures. When the panel member moves, the compressive force or tensile force does not repeatedly act on each part of the panel member, and the durability of the panel member is not impaired. Further, even if the panel member moves, the panel member does not become slack, so that the aesthetic appearance is not impaired. Furthermore, since the panel member does not sag, rainwater, snow, or the like does not stay on the surface of the panel member.

  In the structure constituted by the variable truss structure according to the present invention, the support means is erected integrally with one of the two upper chord members joined by pin joining of the one variable truss structure. A first support member, a second support member erected on one of the two upper chord members joined by pin joining of the other variable truss structure, and the second support member attached to either one of the above A first joint that supports the upper chord member in an in-plane direction including the upper chord member, the lower chord member, and the brace of the other variable truss structure and the out-of-plane direction; and the panel member, A second joint that rotatably supports an upper chord member, a lower chord member, and a brace member of the one variable truss structure on an upper end of the one support member, and an axis of the first support member; The panel member is attached to the upper end of the second support member, An in-plane direction including an upper chord member, a lower chord member, and a brace of the other variable truss structure, an out-of-plane direction, and a third joint that rotatably supports the axis of the second support member. It is good also as being characterized by becoming.

According to the structure constituted by the variable truss structure of the present invention, the first support member is integrally provided on one of the two upper chord members joined by pin joining of one adjacent variable truss structure. The second support member is erected on either one of the two upper chord members joined by pin joining of the other adjacent variable truss structure via the first joint, and the upper end of the first support member and the second support member The panel member is installed between the upper end of the member via the second joint and the third joint.
Therefore, when the upper chord member of one adjacent variable truss structure and the upper chord member of the other adjacent variable truss structure are moved independently, the panel member is moved to one variable truss on the one variable truss structure side. An in-plane direction including the upper chord member, lower chord member, and brace of the structure, and the axis of the first support member, and on the other variable truss structure side, the upper chord member and lower chord member of the other variable truss structure And the in-plane direction including the brace, the out-of-plane direction, and the axis of the second support member, and can move following the movement of the upper chord material of each variable truss structure. Become.

  Further, in the structure constituted by the variable truss structure of the present invention, the panel member has a triangular plate shape, and the first vertex and the second vertex of the panel member are a pair of firsts on the side of the one variable truss structure. The upper end of the support member is supported via the second joint, and the third vertex of the panel member is supported by the upper end of the second support member on the other variable truss structure side via the third joint. It is good also as featuring.

  According to the structure constituted by the variable truss structure of the present invention, the triangular plate-like panel member is secondly attached to the upper ends of the pair of support members on the one side of the variable truss structure where the first vertex and the second vertex are adjacent. It is supported via a joint, and the third vertex is supported via the third joint at the upper end of the second support member on the other side of the variable structure. That is, since the triangular plate-like panel member is supported at three points, it is possible to smoothly move following the movement of the upper chord material of both adjacent variable truss structures.

  Furthermore, the structure constituted by the variable truss structure of the present invention may be characterized in that the structure is a roof frame.

  Furthermore, the method of moving the panel member of the present invention following the variable truss structure includes a plurality of upper chord members joined in series by pin joining, and disposed below the plurality of upper chord members. A plurality of variable truss structures in parallel, each including a plurality of lower chord members joined in series with each other and a brace that obliquely joins between the pin joint portion of each upper chord member and the pin joint portion of each lower chord member In a structure constituted by a variable truss structure in which the upper chord members at both ends of each variable truss structure are supported on the housing side, the other variable adjacent to the upper portion of the upper chord member of one adjacent variable truss structure A method of moving a plurality of panel members laid between the upper chord members of the truss structure and following the variable truss structure, wherein each panel member is connected to the one variable truss structure. First chord Parts and the top of the upper chord member of the other variable truss structure, characterized in that moving to follow the movement of each upper chord member of both the variable truss structure.

  As described above, according to the structure constituted by the variable truss structure according to the present invention, the panel member includes the upper portion of the upper chord material adjacent to the one variable truss structure and the other variable truss via the support means. The upper chord material of each variable truss structure is constructed so as to be able to follow the movement of each upper chord material of the adjacent two variable truss structures. Even if the panel member is moved by this movement, the durability of the panel member is not deteriorated due to repeated application of compressive force or tensile force to the panel member. Further, even if the panel member moves, the panel member does not become slack, so that the aesthetic appearance is not impaired. Furthermore, since the panel member does not sag, rainwater, snow, or the like does not stay on the surface of the panel member.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6 show an embodiment of a structure constituted by a variable truss structure according to the present invention. FIG. 1 is a schematic view showing the whole, FIG. 2 is a partially enlarged view of FIG. 3 is an enlarged view of a portion A in FIG. 2, FIG. 4 is a schematic view of the variable truss structure, FIG. 5 is an explanatory view showing a deformation state of the variable truss structure, and FIG. 6 shows a movement state of the panel member. It is explanatory drawing.

  That is, the structure constituted by the variable truss structure of the present embodiment is applied to the roof frame 2, and as shown in FIG. 1, a plurality of structures arranged in parallel in the upper opening 5 of the housing 4 are provided. The variable truss structure 10, a plurality of panel members 20 installed between two adjacent variable truss structures 10, 10, and each panel member 20 can be moved between two adjacent variable truss structures 10, 10. And supporting means 25 for supporting.

  As shown in FIGS. 2 to 4, each variable truss structure 10 is formed by connecting a plurality of triangular trusses 11 in series to form an arch shape when viewed from the side (indicated by arrow B in FIG. 2). Thus, they are arranged in the upper opening 5 of the housing 4 so as to be parallel to each other at predetermined intervals.

  As shown in FIGS. 2 to 4, each of the variable truss structures 10 is arranged in parallel with a plurality of upper chord members 12 joined in series by pin joining and at a predetermined interval below the plurality of upper chord members 12. In addition, a plurality of expandable lower chord members 14 joined in series by pin joining, and each pin joint portion 13 of each upper chord member 12 and each pin joint portion 17 of each lower chord member 14 are joined obliquely. Each of the upper chord members 12 and the two braces 18, 18 and each lower chord member 14 and the two braces 18, 18 constitute a triangular truss 11, respectively. Yes.

  Each variable truss structure 10 has a plurality of upper chord members 12 joined in series by pin joining, upper chord members 12 at both ends are fixed to the housing 4 side, and each lower chord member 14 is configured to be extendable, The upper chord members 12, 12 that follow the expansion and contraction of the lower chord members 14 in the vertical direction including the upper chord member 12, the lower chord member 14, and the brace 18 pass through the hinges 13 a of the pin joints 13. They rotate in the in-plane direction.

  As shown in FIG. 3, each lower chord member 14 of each variable truss structure 10 is, for example, a lower chord member main body 15 and an upper chord member 12, a lower chord member 14, and a brace 18 connected in series to the lower chord member main body 15. And an actuator 16 (for example, a hydraulic cylinder) that can extend and contract in the in-plane direction. By extending and contracting the actuator 16 in the in-plane direction, the total length of each lower chord material 14 changes following the expansion and contraction of the actuator 16, and the adjacent upper chord materials 12 and 12 follow the change in the total length of each lower chord material 14. The panel member 20, which is rotated in the same direction via the hinge 13 a of the pin joint portion 13 and follows the movement of each upper chord material 12, is moved via the support means 25. become.

  As shown in FIG. 2, the adjacent two variable truss structures 10a and 10b have a pin joint portion 13 between the upper chord members 12 and 12 of one adjacent variable truss structure 10a as the other variable truss structure 10b. The pin connection between the upper chord members 12, 12 between the upper chord members 12, 12 is positioned so as to be shifted by a half of the unit truss 11 relative to the pin connection portion 13 between the upper chord members 12, 12. The adjacent variable truss structures 10a adjacent to each other in such a positional relationship are arranged in parallel with the upper opening 5 of the housing 4 so that the portion 13 is positioned in the middle portion of the upper chord member 12 of each variable truss structure 10b. A plurality of panel members are provided between 10b along the longitudinal direction.

  2 and FIG. 3 between the pin joints 13 of the upper chord members 12 of the one variable truss structure 10a and the pin joints 13 of the upper chord members 12 of the other variable truss structure 10b. The upper chord member 12 is obliquely joined to each other, whereby a triangular shape composed of three upper chord members 12, 12, 12 joined to each other by pin joining to the upper surface sides of the adjacent variable truss structures 10a, 10b. A plurality of panel members 20 are provided along the longitudinal direction between the variable truss structures 10a and 10b so as to correspond to the triangular trusses 11 respectively.

  The panel member 20 has, for example, a triangular plate shape made of a metal such as steel or aluminum, wooden, or synthetic resin. As shown in FIG. 6, each upper chord member of one variable truss structure 10a is formed. A first vertex 20a and a second vertex 20b on one side are located above 12 and a third vertex 20c is located above the pin joint 13 between the adjacent upper chord members 12, 12 of the other variable truss structure 10b. As such, it is provided continuously in the longitudinal direction of one of the variable truss structures 10a.

  Also, the first vertex 20a and the second vertex 20b on one side are positioned above each upper chord member 12 of the other variable truss structure 10b, and between the adjacent upper chord members 12, 12 of one variable truss structure 10a. It is continuously provided in the longitudinal direction of the other variable truss structure 10b so that the third vertex 20c is located above the pin joint 13.

  In this case, a predetermined gap 21 is provided between adjacent panel members 20, 20 of the plurality of panel members 20 that are continuously provided in the longitudinal direction of each of the variable truss structures 10 a, 10 b, and each variable by the gap 21. Each panel member 20 can be smoothly moved following the movement of each upper chord member 12 of the truss structures 10a and 10b. Further, the gap 21 is closed by a flexible sealing member 22 (a sheet-like member formed from rubber, synthetic resin, or the like, a bellows-like member), and rainwater, snow, or the like is passed through the gap 21. Is prevented from entering the inside of the housing 4 and the seal member 22 is prevented from inhibiting the relative movement of the adjacent panel members 20, 20.

  As shown in FIG. 6, the support means 25 is a portion of one of the upper chord members 12 adjacent to the pin joint portion 13 of the two upper chord members 12, 12 joined by pin joining of one variable truss structure 10a. One upper chord member 12 adjacent to the pin joint portion 13 of the two upper chord members 12, 12 joined by the pin joint of the first support member 26 and the other variable truss structure 10b. A second support member 27 erected on the portion, a first joint 28 provided between the second support member 27 and the one upper chord member 12, and an upper end portion of the first support member 26. A second joint 29; and a third joint 30 provided at the upper end of the second support member 27. The second joint 29 and the second joint 29 are provided between the upper end of the first support member 26 and the upper end of the second support member 27. Panel member 20 is supported to be movable through three joints 30. It has been.

  The first joint 28 has an in-plane direction including the upper chord member 12, the lower chord member 14, and the brace 18 adjacent to the other variable truss structure 10b adjacent to the second support member 27 and an out-of-plane direction thereof (in the direction of the arrow in FIG. 6). The lower chord member 13 and the brace 18 have a function of rotatably supporting the lower chord member 13 and the brace 18 (see FIGS. The second joint 29 has the panel member 20 in the in-plane direction including the upper chord member 12, the lower chord member 14, and the brace 18 on the upper end portion of the first support member 26, and the first chord member 12a. 1 has a function of supporting the support member 26 so as to be rotatable about the axis (in the direction of the arrow in FIG. 6, the lower chord member 13 and the brace 18 are shown in FIGS. 2 and 3). Further, the third joint 30 includes the panel member 20 in the in-plane direction including the upper chord member 12, the lower chord member 14, and the brace 18 on the upper end portion of the second support member 27 on the upper end portion of the other variable truss structure 10b. It has a function to support the direction and the axis of the second support member 27 so as to be rotatable (in the direction of the arrow in FIG. 6, the lower chord member 13 and the brace 18 are shown in FIGS. 2 and 3).

  In the above description, the support means 25 of the plurality of panel members 20 provided continuously along the plurality of upper chord members 12 of one variable truss structure 10a has been described, but the other variable truss structure 10b is described. The support means 25 of the plurality of panel members 20 provided continuously along the plurality of upper chord members 12 are pin joint portions of the two upper chord members 12, 12 joined by pin joining of the other variable truss structure 10b. The first support member 26 is erected on any one of the upper chord members 12 adjacent to the pin 13, and the pin joint portions 13 of the two upper chord members 12, 12 joined by pin joining of one variable truss structure 10a. A second support member 27 is erected on the portion of the upper chord member 12 adjacent to the first support member 28 via a first joint 28, and a panel is connected to the upper ends of the pair of first support members 26, 26 via a second joint 29. Part First apex 20a and the second apex 20b of 20 is supported, a third vertex 20c of the third panel member 20 through the joint 30 is to be supported on the upper end of the second support member 27.

  The first of the panel member 20 between the upper end of the pair of first support members 26 and the upper end of the second support member 27 via the first joint, the second joint, and the third joint having the above functions. By supporting the apex 20a, the second apex 20b, and the third apex 20c, the panel members 20 can be moved following the movement of the upper chord members 12 of the adjacent variable truss structures 10a, 10b. .

  In the present embodiment, various universal joints are used for the first joint 28, the second joint 29, and the third joint 30, but a three-dimensional universal joint is used for the first joint 28 and the third joint 30. It is preferable to use a two-dimensional universal joint for the second joint 29.

  The roof frame 2 configured by the variable truss structure 1 according to the present embodiment configured as described above, for example, closes the upper opening 5 of the circular frame 4 as shown in FIGS. 1 and 2. In addition, a plurality of variable truss structures 10 are arranged in parallel in the upper opening 5 of the casing 4, the upper chord members 12 at both ends of each variable truss structure 10 are fixed to the casing 4 side, and both adjacent variable truss structures 10 a are arranged. A plurality of panel members 20 are installed between the upper portions of the upper chord member 12 of 10b via the support means 25, and the gap 21 between the adjacent panel members 20, 20 is closed by the seal member 22, so that the upper portion of the housing 4 A roof 3 that closes the opening 5 can be configured.

 Then, the actuator 16 of the desired lower chord material 14 of each variable truss structure 10 is expanded and contracted, and the upper chord material 12 corresponding to the lower chord material 14 is rotated via the hinge 13a of the pin joint 13 to obtain the upper chord material. By moving the panel member 20 following the movement of 12, for example, the shape of the roof 3 is recessed from the shape of FIG. 5 (a) as shown in FIGS. 5 (b) and 5 (c). The shape of the roof 3 can be changed organically as if it were a living thing.

  In the roof frame 2 according to the present embodiment configured as described above, a plurality of panel members 20 are installed between the upper chord members 12 of both adjacent variable truss structures 10a and 10b, and each panel member 20 is constructed. The first support member 26 is integrally provided upright on the portion of the upper chord member 12 adjacent to the pin joint portion 13 of the two upper chord members 12, 12 joined by pin joining of one variable truss structure 10a. The upper chord material 12 is joined to the upper chord material 12 by the pin joint of the other variable truss structure body 10b and the pin joint portion 13 of the upper chord material 12 is adjacent to the upper chord material 12 via the first joint 28. Since the second support member 27 is supported between the upper end of the second support member 27 via the second joint 29 and the third joint 30, the upper chord member 12 of one variable truss structure 10 a and the other variable truss Structure 10 When the upper chord member 12 is moved independently, the panel member 20 has a surface including the upper chord member 12, the lower chord member 14, and the brace 18 on the one variable truss structure body 10a. In-plane and rotating around the axis of the first support member 26, and on the other variable truss structure 10b side, an in-plane including the upper chord member 12, the lower chord member 14, and the brace 18 on the other variable truss structure 10b It rotates about the direction, its out-of-plane direction, and the axis of the second support member 27, and can move smoothly following the movement of the upper chord material 12 of each variable truss structure 10a, 10b.

  Therefore, even if each panel member 20 moves following the movement of the upper chord member 12 of each variable truss structure 10a, 10b, a compressive force, a tensile force or the like does not repeatedly act on each part of each panel member 20. The durability of each panel member 20 can be significantly increased.

  Further, even if each panel member 20 moves, there is no slack in each panel member 20, so that rainwater, snow, etc. do not stay on the surface of each panel member 20. Furthermore, even if rainwater, snow, or the like acts on the surface of each panel member 20, the rainwater, snow, or the like can be easily removed via the seal member 22 between the adjacent panel members 20, 20.

  Furthermore, since the entire roof 3 can be changed into various shapes by moving each panel member 20, it is possible to follow the change in the shape of the roof 3 and generate an air flow inside the housing 4. The energy required to circulate the air inside the housing 4 can be reduced, and an economically advantageous one can be provided.

  For example, a power generation panel for solar power generation may be installed on the surface of the panel member 20. In this case, high power generation efficiency can be obtained by deforming the roof 3 so that the solar energy received by the power generation panel is increased.

  Further, a member having a high reflectance such as a mirror may be installed on the surface of the panel member 20. In this case, since the inclination angle of each panel member 20 is different, the light is reflected in various directions by irradiating the roof 3 with light, and an effect that is excellent in beauty like a so-called mirror ball can be obtained. By using the effect, the inclination of the panel member 20 can be used as a communication means.

  In the above description, the panel member 20 has a triangular plate shape, but a panel member having another shape such as a square plate shape may be used. When the panel member having such a shape is used, adjacent panel members do not interfere with each other when the panel members move following the movement of the upper chord material 12 of the variable truss structures 10a and 10b. In addition, by providing a sufficient gap between the adjacent panel members, the same effects as the triangular plate-like panel member 20 can be obtained.

  In the above description, the lower chord material 14 is composed of the lower chord material main body 15 and the extendable actuator 16. However, the lower chord material 14 is not limited to the actuator 16, and the entire length of the lower chord material 14 is changed. Anything can be used.

  In the above description, the plurality of variable truss structures 10 are arranged in parallel so as to be parallel to each other. However, the plurality of variable truss structures 10 are not necessarily provided in parallel. However, the same effects as described above can be obtained.

  Furthermore, in the above description, the case where the present invention is applied to the roof frame 2 has been described, but the present invention is not limited to this and can be applied to various variable structures.

It is the schematic which showed the whole one Embodiment of the structure comprised by the variable truss structure by this invention, Comprising: It is the schematic which showed the whole roof frame. It is the elements on larger scale of FIG. It is an enlarged view of the A section of FIG. It is a schematic diagram of a variable truss structure. It is explanatory drawing which showed the state of the movement of a variable truss structure. It is explanatory drawing which showed the state of the movement of the panel member in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Variable truss structure 2 Roof frame 3 Roof 4 Housing 5 Upper opening 10 Variable truss structure 10a One variable truss structure 10b The other variable truss structure 11 Truss 12 Upper chord material 13 Pin joint 13a Hinge 14 Lower chord material 15 Lower chord Material body 16 Actuator 17 Pin joint 17a Hinge 18 Brace 20 Panel member 20a First vertex 20b Second vertex 20c Third vertex 21 Gap 22 Seal member 25 Support means 26 First support member 27 Second support member 28 First joint 29 Second joint 30 Third joint

Claims (5)

A plurality of upper chord members joined in series by pin joining, a plurality of lower chord members arranged below the plurality of upper chord members and joined in series by pin joining, and pin joint portions of the upper chord members, A plurality of variable truss structures each having a brace that obliquely joins between the pin joint portions of the lower chord members are arranged in parallel, and the upper chord members at both ends of each variable truss structure are supported on the housing side. A structure constituted by a truss structure,
A plurality of panel members constructed between the upper portion of the upper chord member of one adjacent variable truss structure and the upper portion of the upper chord member of the other adjacent variable truss structure;
Each panel member can be moved to the upper part of the upper chord member of the one variable truss structure and the upper chord member of the other variable truss structure following the movement of the upper chord members of both variable truss structures. A structure constituted by a variable truss structure characterized by comprising support means for supporting the structure. The support means includes a first support member that is integrally provided upright on one of the two upper chord members joined by pin joining of the one variable truss structure;
A second support member erected on one of the two upper chord members joined by pin joining of the other variable truss structure, and the second support member on the one upper chord member, and the other A first joint that is rotatably supported in an in-plane direction including the upper chord member, the lower chord member, and the brace of the variable truss structure, and in an out-of-plane direction thereof;
The panel member is rotatable at the upper end of the first support member in an in-plane direction including the upper chord member, the lower chord member, and the brace of the one variable truss structure, and around the axis of the first support member. A second joint to be supported;
In the in-plane direction including the upper chord member, the lower chord member, and the brace of the other variable truss structure on the upper end of the second support member, in the out-of-plane direction, and around the axis of the second support member A structure constituted by the variable truss structure according to claim 1, further comprising a third joint that is rotatably supported.   The panel member has a triangular plate shape, and the first vertex and the second vertex of the panel member are supported on the upper ends of the pair of first support members on the one variable truss structure side via the second joint, 3. The variable truss structure according to claim 1, wherein a third vertex of the panel member is supported by an upper end of a second support member on the other variable truss structure side via the third joint. A structure composed of   The said structure is a roof frame, The structure comprised by the variable truss structure in any one of Claims 1-3 characterized by the above-mentioned. A plurality of upper chord members joined in series by pin joining, a plurality of lower chord members arranged below the plurality of upper chord members and joined in series by pin joining, and pin joint portions of the upper chord members, A plurality of variable truss structures each having a brace that obliquely joins between the pin joint portions of the lower chord members are arranged in parallel, and the upper chord members at both ends of each variable truss structure are supported on the housing side. In the structure constituted by the truss structure, a plurality of panel members laid between the upper part of the upper chord member of one adjacent variable truss structure and the upper part of the upper chord member of the other variable truss structure adjacent to each other A method of moving following a variable truss structure,
The panel members are moved to the upper part of the upper chord member of the one variable truss structure and the upper chord member of the other variable truss structure following the movement of the upper chord members of the two variable truss structures. A method of moving the panel member following the variable truss structure.