JP2023075890A - Modular framework structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a modular framework structure capable of forming a truss structured facility by combining unit modules only.

SOLUTION: The modular framework structure is configured to construct a three-dimensional truss structured facility by building unit modules serving as unit frames for a three-dimensional truss structure, and then, connecting the unit modules. In the unit module, ridge portions of a tetrahedron or octahedron are formed of frames 3 each having an elongated joint surface, and the ends of each frame 3 having the elongated joint surface are connected by a joint member 4 to be assembled into a tetra module 1 as a tetrahedral frame, or an octa-module as an octahedral structure, and then, the frames 3 having the elongated joint surfaces are joined to each other with the elongated joint surfaces being joined so that the tetra modules 1 or octa-modules being the unit modules, are connected with each other, and each portion where joints of the unit modules are aggregated together is covered with a gusset plate 9 to be connected together so as to reinforce the joint between unit modules.

SELECTED DRAWING: Figure 17

COPYRIGHT: (C)2023,JPO&INPIT

Description

The present invention relates to a modular framework of structures using space trusses.

The truss structure, which consists of the roof and side walls of a structure with a three-dimensional truss module that combines single-shaped members into regular tetrahedrons or regular octahedrons, is composed only of shaped members, so management and construction of members The procedure can be simplified, and the construction work can be made more efficient by modularizing the members.

For example, the following patent document was proposed by Mr. Richard Buckminster Fuller. An octet truss structure is disclosed that comprises the sidewalls and the like.
U.S. Pat. No. 2,986,241

This patent describes an octet truss structure, which is a planar or layered vector counterbalance-like structure, and is used for the dock roof and wall of a B-36 bomber as shown in FIGS. An example of forming is shown.

As for the octet truss structure, many proposals have been made in the past. Frames (strings) are connected with joints (connecting members) to create a tetrahedral frame that becomes a unit frame of the space truss structure, and the tetrahedral frames are mutually connected. The content of constructing a three-dimensional truss structure by joining to is shown in the following patent document.
Japanese Patent No. 4431805 Japanese Patent No. 4709982

Modularization (unitization) is an important factor in forming a space truss structure by combining members of a single shape, but in Patent Document 1, a seat module as shown in FIG. 41 is constructed instead of a strut module. An example of an octet truss structure is shown. An octet truss structure is a truss structure that consists of a regular tetrahedral frame region and a regular octahedral frame region, one of which is a complementary spatial region.

The sheet module may be a thin sheet of aluminum 39 with a flange 40 extending from one edge as shown in FIG. Extends at an angle and overlies the octahedral and tetrahedral faces of the framework system.

Flange 41 faces upward and outward of the seat and flange 42 faces downward and outward.

One octahedron of the truss of FIG. 38 is assembled from four aluminum sheets 39 .

The unit-type frame structure and frame member units of the structure of Patent Document 4 below are proposed to secure a wide space inside by using a vector balance truss as a basic module.
Japanese Patent No. 4889020

In Patent Document 4, a plurality of vector-balanced truss units composed of frame members of the same length are opposed on either side by two units, and the corresponding four nodes on the bottom and top sides of the opposed sides are respectively A connecting member B having the same length as the framework member A is used to bridge and join, and the mating nodes of the triangular pairs on the opposite sides are joined to connect in the lateral direction.

According to Patent Document 4, since a quadrangular pyramid truss is formed between the side surfaces of the vector-balanced trusses that are connected, a unit of the vector-balanced truss that is unstable as a single unit can be assembled as a stable truss structure.

In addition, since the basic unit is a vector equilibrium truss having a shape obtained by cutting off each vertex of a cube (regular hexahedron), a relatively large internal space of the cube can be secured inside each truss structure.

In the module shown in FIG. 36 in Patent Document 1, the angle of the seat flange of the seat is not uniform and varies depending on the location of use, and not all members are the same. Also, the octahedron of the truss of FIG. 37 is assembled from four aluminum sheets 39, but it is difficult to construct a truss structure by using this octahedron as a single module.

In addition, in the truss structure of Patent Document 1, the walls are formed obliquely with respect to the roof to form the framework of the roof, walls and floor made up of trusses forming a triangle as shown in FIGS. end up

The unit type frame structure and frame member units of the structure of Patent Document 4 combine a plurality of units of vector balance type truss to form a three-dimensional truss structure. A combination of two types of members to be joined is required.

OBJECTS AND SUMMARY OF THE INVENTION To solve the above-described problems of the prior art, it is possible to combine unit modules to form a truss structure by combining only unit modules without using connecting members other than the unit modules, and furthermore, gussets. It is an object of the present invention to provide a modular framework structure capable of reinforcing joints between unit modules between joint members by means of plates.

In order to achieve the above object, the present invention provides a modular frame structure. Firstly, a module is constructed to construct a space truss structure by constructing unit modules that are unit frames of a space truss structure and connecting the unit modules to each other. A unit module has a tetrahedral or octahedral ridgeline portion formed by a frame having elongated joint surfaces, and the ends of the frames having elongated joint surfaces are connected by joint members to form a tetrahedral structure. or an octahedral frame, which is an octahedral structure, and the frames having elongated joint surfaces are joined together at the elongated joint surfaces to connect the tetramodules or octamodules, which are unit modules, to each other. The gist of the invention is to cover and connect joints of modules with a gusset plate to reinforce the joints between unit modules.

Secondly, the gusset plate is made of a disk plate. Thirdly, the joints of the unit modules on the outer periphery are covered with a disk plate bent at 90 degrees and connected to reinforce the joint between the unit modules. This is the gist of it.

According to the present invention, in constructing unit modules that can be used in blocks and combining the unit modules so as to construct a space truss structure, frames that form the ridges of tetrahedrons or octahedrons are elongated. Since it can be done by joining the elongated joint surfaces of members having joint surfaces, it is possible to construct a space truss structure by combining only unit modules without using members other than unit modules as connecting members. As a result, assembly can be performed easily and quickly with a small number of man-hours, and can be formed by assembling only unit modules, thereby improving prefabrication.

Furthermore, when unit modules are combined, the frames forming the ridges of the tetrahedron or octahedron are overlapped with each other to form a double layer, which increases the strength. The object itself becomes solid.

Furthermore, the gusset plate can reinforce the joint between the unit modules between the joint members. Further, since the gusset plate is a disk plate, it is possible to reinforce the connection of the four unit modules with a single gusset plate. Furthermore, joints of the unit modules on the outer periphery can be covered with a disc plate bent at 90 degrees to connect the joints of the unit modules, thereby reinforcing the joints between the unit modules.

In addition, each unit module can be assembled by joining the slender joining surfaces of the frame, which is the ridgeline portion, so that the modules can be stacked not only in the lateral direction but also in the vertical direction to assemble a multi-layered stable truss structure.

In this way, a stable truss structure with a variable shape can be constructed by simply connecting unit modules, so it is possible to easily cope with requests for changes in specifications and space after construction.

Depending on the number of required unit module spaces, it can be applied to various modular space structures, from small prefabricated structures such as vinyl houses, lodges, and shelters to large-scale structures such as buildings, bridges, and artificial ground. is.

Since the framework of the structure can be constructed by combining only the unit modules, it is easy to manufacture and manage the members, and when assembling, it is sufficient to connect modules of the same shape in the same pattern, so construction efficiency and cost reduction can be achieved. .

1 is a plan view of one embodiment of the frame structure of the present invention without the gusset plates; FIG. FIG. 4 is an explanatory view showing a state in which unit modules are assembled together when the unit modules used in the frame structure of the present invention are regular tetrahedral frames, and in which there is no gusset plate; FIG. 2 is a perspective view of FIG. 1 showing the frame structure of the present invention in a state where the whole is a disk-like body; FIG. 4 is a side view showing a state in which the board-like body is orthogonal to the frame structure of the present invention; FIG. 4 is a perspective view showing a state in which the board-like bodies are orthogonal to each other in the framework structure of the present invention; 1 is a perspective view showing an embodiment in which unit modules used in the frame structure of the present invention are tetramodules. FIG. 1 is a plan view showing an embodiment in which a unit module used in the frame structure of the present invention is a tetramodule; FIG. FIG. 4 is a front view showing an example of a joint member used in unit modules used in the frame structure of the present invention; FIG. 4 is a perspective view showing an example of a joint member used in unit modules used in the frame structure of the present invention; FIG. 4 is an explanatory view showing coupling between joint members; FIG. 4 is an explanatory diagram showing joining of a joint member to a frame having elongated joining surfaces; FIG. 4 is a perspective view showing an example of mutual joining of unit modules; FIG. 4 is a plan view showing that a quadrangular pyramid-shaped truss frame region is formed inside when the unit module is a tetra-module in the frame structure of the present invention. FIG. 4 is a perspective view showing a state of connection in which a quadrangular pyramid-shaped truss frame region is formed inside when the unit module is a tetra-module in the framework structure of the present invention. FIG. 10 is an explanatory view showing that in the frame structure of the present invention, when the unit modules are tetramodules, a quadrangular pyramid-shaped truss frame region is formed inside. FIG. 4 is a plan view showing that, in the frame structure of the present invention, when the unit module is a tetramodule, a regular octahedral frame region is formed inside. FIG. 17 is a partially enlarged view of FIG. 16; FIG. 4 is a front view showing an application example of the gusset plate; FIG. 4 is an explanatory view showing development of assembly of unit modules in the frame structure of the present invention; It is explanatory drawing of a regular tetrahedron. FIG. 4 is an explanatory diagram showing the relationship between the center and vertices of a regular tetrahedron; FIG. 2 is a perspective view showing an embodiment in which unit modules used in the frame structure of the present invention are octahedral-shaped frames. FIG. 4 is a plan view showing an embodiment in which the unit modules used in the frame structure of the present invention are octahedral-shaped frames. FIG. 4 is a plan view showing an example of forming a tetrahedral frame region inside a truss structure obtained by assembling unit modules in the case of an octa module in which the unit modules of the present invention are octahedral frames. FIG. 24 is a plan view when the unit modules of FIG. 23 are further increased; FIG. 10 is a perspective view showing that an octamodule, which is a regular octahedral frame, is created from two tetramodules. FIG. 3 is a perspective view showing a combination of octamodules made from two tetramodules; FIG. 4 is a perspective view showing an example in which a frame having elongated joint surfaces of unit modules is made of angle members; 1 is a perspective view of an embodiment of a tetramodule in which a frame with elongated joint surfaces is formed of H-beam steel; FIG. FIG. 10 is a perspective view showing a combined state of tetra modules in which a frame having elongated joint surfaces is formed of H-shaped steel; FIG. 4 is a perspective view showing an example in which a frame having elongated joint surfaces of unit modules is made of a channel material; FIG. 10 is a perspective view showing a combined state of tetra-modules in which a frame having elongated joint surfaces is formed of a channel material; FIG. 4 is a perspective view showing formation of a regular octahedral frame by combining four tetramodules; FIG. 3 is a perspective view of a frame structure by combining 64 tetramodules; FIG. 3 is a perspective view of a frame structure by combining 216 tetramodules; 1 is a perspective view showing an example of a conventional unit module proposed by Buckminster Fuller; FIG. FIG. 10 is a plan view showing a conventional space truss structure composed of unit modules proposed by Buckminster Fuller. 1 is a perspective view of an octahedron composed of unit modules proposed by Buckminster Fuller as a conventional example. FIG. FIG. 10 is a front view showing an example of forming the roof and walls of an airplane dock with a space truss structure proposed by Buckminster Fuller as a conventional example. FIG. 10 is a side view showing an example of forming the roof and walls of an aircraft dock with a space truss structure proposed by Buckminster Fuller as a conventional example.

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view showing one embodiment of the frame structure of the present invention. A tetrahedral frame that is a unit frame (referred to as a unit module) of a space truss structure is constructed, and tetramodules 1, which are tetrahedral frames, are interconnected. Join to construct a space truss structure.

First, the tetramodule 1 will be explained. The tetramodule 1 is a regular tetrahedron, and the regular tetrahedron consists of three equilateral triangular faces A and has four vertices B and six sides C, as shown in FIG. Furthermore, as shown in FIG. 21, the mutual angle between the line E connecting the center D of the regular tetrahedron and the vertex B of the regular tetrahedron is 109.5 degrees.

The elongated joint surface 2 of the frame 3 is a plane obtained by cutting off the side C (ridge line) of the regular tetrahedron, and the angle formed by the plane is It has no inclination. Also, the width of the elongated joint surface 2 depends on the degree of scraping, but is not particularly limited.

As shown in FIGS. 6 and 7, the tetramodule 1 is a regular tetrahedron, but to be precise, it is supposed to be a regular tetrahedron, and a frame 3 having an elongated joint surface 2 is used as a ridge line portion of the regular tetrahedron. The end portions of the frame 3 having these elongated joint surfaces 2 were connected by joint members 4 to assemble a regular tetrahedral frame. The equilateral triangle of the regular tetrahedron becomes the opening surface. Note that all frames 3 have the same length.

The frame 3 having the elongated joint surfaces 2 serves as a shaft member of the regular tetrahedron frame, and a total of six pieces are assembled together with joint members 4 . The "shape" of the regular tetrahedral frame means that the tetramodule 1 has a total of six elongated joint surfaces 2, and the four vertices have equilateral triangular planes 7 that are the ceilings of the joint members 4, It is a tetrahedron, although it is a total of 14 faces.

The frame 3 having the slender joint surface 2 is shown in the figure as a rectangular slender flat plate that is a band-shaped square bar. It can be of any shape, such as a semi-cylindrical shape, a triangle or other square shape, and a hollow pipe shape.

As described above, the frame 3 can have various cross-sectional shapes as long as it has an elongated joint surface 2, and a flat plate, hollow tube, H-shaped or other type steel, angle material, or channel material can be selected. Is possible.

28 shows an example in which the frame 3 is made of angle material 11, FIGS. 29 and 30 show an example in which it is made of H-shaped steel 13, and FIGS. 31 and 32 show an example in which it is made of channel material 14.

The material of the frame 3 having the elongated joint surface 2 can also be selected from various materials depending on the use of the space truss structure to be completed, such as steel, metal such as aluminum, wood, synthetic resin, and the like. Titanium with high anti-corrosion properties can be used for offshore structures and the like.

The material of the joint member 4 is also the same, and can be selected from various materials depending on the application, such as metal such as steel and aluminum, wood, synthetic resin, and the like.

The joint member 4 for assembling the frame 3 having the elongated joint surface 2 may have any shape as long as the frame 3 having the elongated joint surface 2 can be assembled into a regular tetrahedral structure. It is preferable that three joint pieces 5 to the frame 3 are developed with a mutual opening of 120° in a plan view, and these joint pieces 5 are connected to each other by a top plate or a side plate 6 . The illustrated example is interconnected by side plates 6 . The side plate 6 may be without this.

In order not to interfere with the mutual joining of the tetramodules 1, which are unit modules, the end faces of the rectangular elongated flat plates 2 should not be covered with the ceiling portion 7 of the joint member 4. is an equilateral triangular opening, or a substantially equilateral triangular (hexagonal) top plate as shown in the figure. The end portions of the joint pieces 5 and the side plates 6 are continuously connected to each (side) edge of the ceiling portion 7 . An enlarged view of the joint member 4 is shown in FIGS. 8 and 9. FIG.

Although illustration is omitted, when the ceiling portion 7 of the joint member 4 is composed of a top plate, a through hole for bolt connection may be provided in the central portion thereof.

Also, as shown in FIG. 10, a plurality of joint members 4 (four in the figure) can be joined together by welding or other means to make the whole into a large mass.

Regarding the connection between the frame 3 having the elongated joint surface 2 and the joint member 4, at the joint portion of the joint piece 5 of the joint member 4 and the rectangular elongated flat plate 2, the two are overlapped and then fixed, or the elongated joint is applied. A slit is formed in the frame 3 having the surface 2, and the joint piece 5 is inserted into the slit and sandwiched between them.

6 and 7 show an example in which the joint piece 5 of the joint member 4 is joined on the outside of the frame 3 having the elongated joint surface 2, but conversely, it may be joined on the inside. FIG. 11 shows examples of joining both inside (see FIG. 11a) and outside (see FIG. 11b).

When the joint piece 5 is joined outside the frame 3 having the elongated joint surface 2, the joint piece 5 of the joint member 4 should be flush with the elongated joint surface 2 so that the joint piece 5 does not protrude. The presence of the member 4 does not interfere with overlapping joining of the frames 3 having the elongated joining surfaces 2 .

Next, the formation of a space truss structure with such tetramodules 1 will be described. The tetramodules 1 are assembled as unit modules by joining together to form a three-dimensional truss structure. As shown in FIG. The elongated joint surfaces 2 are overlapped and joined.

The tetramodules 1 are joined and fixed to each other by fixing the frames 3 having the elongated joint surfaces 2 to each other at the portion of the frame 3, or by fixing the frames 3 having the elongated joint surfaces 2 to each other. There is a case where the joint members 4 are connected to each other without doing so, and a case where both of them are adopted.

In addition, in order to stack frames 3 having elongated joint surfaces 2 and fix each other at the portion of the frames 3, they are joined by means such as fastening with bolts and nuts, welding, concavo-convex joining, crimping with a band or the like. Is possible.

Furthermore, in order to strengthen the mutual superposition of the frames 3, as shown in FIG.

As an example of bonding by interlacing due to such unevenness 8, in addition to the illustration in FIG. 12, a case where the elongated bonding surface 2 is embossed with point-like unevenness, a case where teeth are notched, etc. can be assumed.

The shape of the three-dimensional truss structure that can be assembled by joining the tetramodules 1 to each other is possible in various forms such as a board shape and a cube shape, and as shown in FIG. be able to.

The space truss structure assembled with the tetramodules 1 has a complementary four-dimensional structure inside the space truss structure as a result of joining the frames 3 having the elongated joint surfaces 2 of the tetramodules 1 to each other by joining the elongated joint surfaces 2 to each other. A pyramidal truss frame region B is constructed.

As shown in FIG. 13, when four tetramodules 1 are combined so that the vertexes are gathered at one point, one of the elongated joint surfaces 2 of the frame 3 corresponding to the sides forming the surfaces facing the vertexes of the tetramodules 1 First, a square frame A surrounding the set of vertices gathered at one point is formed, and a complementary quadrangular pyramid-shaped truss frame region B is formed here.

To further explain the complementary quadrangular pyramid-shaped truss frame region B, two tetra-modules 1, which are unit modules of a regular tetrahedral frame, are joined together at their elongated joint surfaces 2 at the portion of the frame 3 that serves as the ridgeline portion. , the frame 3 on which this elongate joint surface 2 overlaps serves as a diagonal member, while the other frames 3 are arranged horizontally or vertically and orthogonally with the elongate joint surface 2 facing outward. When these are combined, a square frame A on the bottom surface of the complementary quadrangular pyramid-shaped truss frame region B is formed.

Incidentally, the volume of the complementary square-pyramidal truss frame region B is the same as the volume of two tetramodules 1 combined.

When the tetramodules 1 that are connected in this way are assembled in the front, back, left, and right, it is possible to form a complementary quadrangular pyramid-shaped truss frame region B between the side surfaces of the unit modules, and a stable truss structure can be formed only by the tetramodules. Can be assembled.

Furthermore, when combining the tetramodules 1, the frames 3 that form the ridges of the regular tetrahedron are overlapped with each other, making them double, which increases the strength. becomes robust.

Further, as shown in FIGS. 14, 15, and 16, it is also possible to form a truss structure so as to incorporate a regular octahedral frame region C into which the complementary quadrangular pyramid-shaped truss frame regions B are united. be.

FIG. 33 is the same as the structure in FIG. 14, but a regular tetrahedral truss (shown in gray) having a ridge length twice that of the tetramodule 1 formed by four tetramodules 1 is formed. , forming a complementary regular octahedral framework region C therein.

A tetrahedral truss of the same size as the tetrahedral truss (shown in white) intersects at each other's midpoints to form a new dual tetrahedral truss. In this case, the four outer vertices of the dual tetrahedral trusses form the eight vertices of the cube truss structure. The cube-shaped truss structure consists of eight regular tetrahedral modules.

In the case where the right side of FIG. 15 includes the quadrangular pyramidal truss frame region B to form a regular octahedral frame region C inside, the left side is a square pyramidal truss frame region B facing outward with the quadrangular bottom face of the quadrangular pyramidal truss frame region B as an open face. This is the case where the face piece-shaped frame region C is not configured. The upper side is the state after assembly, and the lower side is the state after assembly.

The combination of the tetramodules 1 is relatively free, and an example of its development is shown in FIG. Then, one of them is turned over (the center of FIG. 18) and the frame 3 is joined so that the four vertexes of each other are aligned to form a planar truss structure with three-fold rotational symmetry (the right end of FIG. 18).

As shown in FIGS. 16 and 17, the gusset plate 9 was used to connect the joints 4 at the apexes of the tetramodule 1, which is the regular tetrahedral frame, to cover the joints.

The gusset plate 9 is a circular disc plate in the illustrated example, and reinforces the connection between the unit modules between the joint members.

Further, since the gusset plate 9 is a disk plate, it is possible to reinforce the connection of the four unit modules with a single gusset plate.

Furthermore, as shown in FIG. 18, joints of the unit modules on the outer periphery are covered with a gusset plate 9' made of a disk plate bent at 90 degrees and connected to reinforce the joints between the unit modules. In this way, the gusset plate 9' can reinforce the connection between the unit modules.

Figures 34 and 35 show the growth morphology of the tetramodule 1 combination. FIG. 34 shows a tetrahedral truss structure four times the length of the ridgeline of the tetrahedral module (shown in gray) is formed from 24 tetrahedral modules.

A regular tetrahedral truss structure with four times the length of the ridgeline and a regular tetrahedral truss structure of the same size (shown in white) intersect at the midpoint of each other's ridgeline to form a dual regular tetrahedral truss. form a structure. In this case, the four outer vertices of the dual tetrahedral trusses form the eight vertices of the cube truss structure. Finally, a cube-shaped truss structure is formed from 64 regular tetrahedral modules.

In FIG. 35, the four outer vertices of the dual tetrahedral trusses constitute the eight vertices of the cube truss structure. A cube-like truss structure consisting of all tetrahedral modules is formed from 216 tetrahedral modules.

In the modular frame structure of the present invention, when constructing a structure having a floor X, a wall Y, and a roof Z, the quadrangles on the base surface of the quadrangular pyramidal truss frame region B are arranged horizontally or vertically, and the construction surface should be formed.

FIG. 3 is a perspective view of the board-like body as a whole, in which a bonding surface a for mutually bonding the tetramodules 1 and a bonding surface b for mutually bonding the tetramodules 1 are formed horizontally. .

FIGS. 4 and 5 show the state in which the board-shaped bodies are orthogonalized. As shown in FIGS. 4 and 5, the connection between the floor X portion and the wall Y portion or the connection between the wall Y and the roof Z portion is the connection between the frames arranged horizontally or vertically and in the orthogonal direction. A space truss structure as a roof Z can be assembled at right angles, and a wall Y can be formed that rises (or falls) at right angles to the floor or roof Z.

In FIG. 4, c is the extension of the floor X at the joining surface of the tetramodules 1 horizontally for joining them to each other. d is an extension of the wall Y, the joining surface of the tetramodules 1 for joining them together vertically. e is the joint surface of the tetramodules 1 for joining them together horizontally and is an extension of the roof Z;

As for the yield strength and deformation shape of the space truss structure constructed in this way, the utility of the quadrangular pyramidal truss frame area B, which is a complementary quadrangular pyramidal truss by the tetramodule, will be explained.

Space truss structures are often used for roof structures because they are lightweight and can form large spans. Therefore, vertical loads such as snow load and wind load are dominant, and the design is examined based on strength design. Consider applying a space truss structure that forms a large planar span to a structure that supports an extremely large vertical load over a long period of time. In this case, the impact of earthquakes must also be considered, and the capacity of the space truss to withstand horizontal loads and plastic deformation capacity are required.

If the space truss shown in Fig. 1 is viewed as a lattice structure, the space truss composed of complementary quadrangular pyramid-shaped regions by tetramodules has square lattices on the upper and lower surfaces, and diagonal members are connected to the lower chord members that constitute the lower surface. It can be regarded as a component structure that overlaps on the projection plane. In this case, the individual members forming the complementary quadrangular pyramid-shaped truss frame regions constitute three-dimensionally oriented members.

Therefore, even if the truss members of the space truss structure buckle, the stress can be redistributed, and toughness against seismic force can be expected. In addition, the truss structure, which constitutes the complementary quadrangular pyramidal truss frame area with tetra modules, is more economical than other three-dimensional truss member configurations because it is prefabricated with tetra modules, which has a minimum number of members and nodes. A space truss can be formed.

Next, as a second embodiment of the present invention, as shown in FIGS. 22 and 23, the case where the unit modules that are the unit frames of the space truss structure are octahedral frames 10 will be described. A regular octahedron is a type of regular polyhedron, and is a three-dimensional solid whose space is surrounded by eight equilateral triangles. It is also a shape in which each vertex of a regular tetrahedron is cut down to the center of the side.

In the case of the octamodule 10 of the present invention, as in the case of the tetramodule 1, a regular octahedron is assumed to be precise, and the frame serving as the ridge line portion of the octahedron is formed of a frame 3 having an elongated joint surface 2, and these elongated joint surfaces are formed. 2 were connected by joint members 4 to assemble a regular octahedral structure.

All frames 3 are of the same length. The octa-module consists of two quadrangular pyramid-shaped frames arranged vertically with a square frame in common, and three sets of square frames cross each other to form eight triangular lattices.

Although illustration is omitted, the joint member 4 has three joint pieces that are connected to the frame having an elongated joint surface and are spread out at an angle of 90° to each other in a plan view. It becomes connected.

The frame 3 having the elongated joint surface 2 serves as a shaft member of the regular octahedral frame, and a total of 12 joint members 4 are assembled. There are 12 faces, and 6 vertices have regular quadrangular planes, and these are added to the 8 regular triangular truss faces that are the side faces, making a total of 26 faces.

The joint member 4 may have any shape as long as it can be assembled into a regular octahedral frame by the frame 3 having the elongated joint surface 2. The pieces may be developed with an opening of 90° to each other in a plan view, and these joining piece portions 5 may be connected to each other by a top plate or a side plate.

The frame 3 having the slender joint surface 2 is shown in the figure as a rectangular slender flat plate that is a belt-shaped square bar. It can be of any shape, such as a semi-cylindrical shape, a triangular shape, a rectangular shape, or a hollow pipe shape.

As in the case of the tetramodule 1, the frame 3 having the elongated joint surfaces 2 can be selected from flat plates, hollow tubes, H-shaped or other shaped steel, angles, or channels.

The material of the frame 3 having the elongated joint surface 2 can also be selected from various materials depending on the use of the space truss structure to be completed, such as steel, metal such as aluminum, wood, synthetic resin, and the like. Titanium with high anti-corrosion properties can be used for offshore structures and the like.

The material of the joint member 4 is also the same, and can be selected from various materials depending on the application, such as metal such as steel and aluminum, wood, synthetic resin, and the like.

The elongated joint surface 2 of the frame 3 is a plane obtained by cutting off the side C (ridgeline) of the regular octahedron, and the angle formed by the plane is not tilted in the width direction of the elongated joint surface 2 with respect to the center of the regular octahedron. It is. Also, the width of the elongated joint surface 2 depends on the degree of scraping, but is not particularly limited (not shown).

The joining piece portion 5 of the joint member 4 and the rectangular elongate flat plate 2 are joined by overlapping or inserting, and fixed by fastening with bolts and nuts, welding, etc., and the joining piece portion 5 of the joint member 4 is an elongate joint surface. It is the same as the tetramodule 1 when joining on the inside of the frame 3 with 2, when joining on the outside, by inserting, etc.

Next, the formation of a space truss structure with such octamodules 10 will be described. The octamodules 10 are joined together to form a three-dimensional truss structure. Similar to the tetramodules 1, this joining involves overlapping and joining frames 3 having elongated joint surfaces 2 at the elongated joint surfaces 2. As shown in FIG.

The octamodules 10 can be joined together by either fixing the frames 3 having the elongated joint surfaces 2 to each other or by joining the joint members 4 to each other without fixing the frames 3 having the elongated joint surfaces 2 to each other. Sometimes it does and sometimes it does both.

In addition, in order to stack frames 3 having elongated joint surfaces 2 and fix them together at this frame 3 portion, they can be joined by means such as fastening with bolts and nuts, welding, concavo-convex joining, and caulking with a band or the like. Although it is possible, unevenness may be formed on the elongated joint surface 2 and jointing may be performed by interlacing.

As described above, the octamodule 10 having two quadrangular pyramidal trusses inside with a quadrangular bottom surface in common, when assembled with three-fold rotational symmetry as shown in FIG. A complementary regular tetrahedral framework region D is formed in the .

FIG. 25 shows a case in which the combination of the octamodules 10 is further expanded to form a board. material. Formation of a complementary regular tetrahedron frame region D inside the space truss structure is the same as in FIG. 24 .

The strength and deformation shape of the space truss structure having the complementary regular tetrahedron frame region formed only by octamodules in this way are as described above.

As a third embodiment of the present invention, as shown in FIG. 26, the octamodule 10 is formed by connecting two tetramodules to each other and adding a frame 3a having a length of √2 of the frame 3. bottom.

By interconnecting the octamodules 10 as shown in FIG. 27, a complementary tetrahedral frame region D formed by a frame 3a having a length of √2 can be formed.

Although not shown, the octamodule 10 may also be configured as an integrated module without using joint members, like the integrated tetramodule 1 shown in FIGS.

DESCRIPTION OF SYMBOLS 1... Tetra module 2... Elongated joint surface 3, 3a... Frame 4... Joint member 5... Joint piece part 6... Side plate 7... Ceiling part 8... Concave and convex portion 9, 9'... Gusset plate 10... Octa module 11... Angle member 13... H-shaped steel 14 Channel material 39 Aluminum sheet 40, 41, 42 Flange A Square frame B Quadrangular pyramid truss frame region C Octahedral frame region D Tetrahedral frame region X Floor Y Wall Z... Roof a, b, c, d, e... Part of square frame

Claims (3)

It is a modular frame structure that builds unit modules that become the unit frame of the space truss structure, and joins the unit modules to build the space truss structure. The frame is formed by a frame having a surface, and the ends of the frame having the elongated joint surface are connected by a joint member to assemble a tetramodule, which is a tetrahedral structure, or an octamodule, which is an octahedral structure, and the elongated joint surface is assembled. The tetramodules or octamodules, which are unit modules, are connected to each other by joining the elongated joint surfaces of the frames, and the joints of the unit modules are covered with a gusset plate to connect the joints between the unit modules. A modular frame structure characterized by reinforcing the 2. The modular frame structure of claim 1, wherein the gusset plates are disk plates. 3. The modular frame structure according to claim 2, wherein joints of the unit modules on the outer circumference are covered and connected by a disk plate bent at 90 degrees to reinforce the joints between the unit modules.

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