JP3171226B2 - Joint members of frame chord in truss base structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a truss base structure having a fixed dome, a partially openable dome, or a pyramid type, a mosque type, a flat type or the like, and more particularly to a truss base structure using a polygonal cylindrical hub. The present invention relates to a joint member for fitting a frame chord to be used.

[0002]

2. Description of the Related Art In recent years, there has been a demand for improved architectural techniques, daylighting, large spaces, etc., and there is no need for a botanical garden dome, a memorial home dome, an outdoor concert hall roof, a gas station roof, a sports house, an event house, a cultural facility, etc. Pillar space architectural structures have been built. As the pillar-free space building structure, a dome type as shown in FIGS. 17 and 18, a mosque type as shown in FIGS. 19 and 20, FIG.
1, pyramid type as shown in FIG. 22, FIG. 23, FIG.
There is a truss structure such as a barrel vault type shown in FIG. 25, a flat structure type shown in FIGS. 25 and 26, and the base structure is a single-layer or double-layer structure, on which a roof is mounted. You. And, as their basic structure, they are formed by a truss point material and a joint material. A truss point system in a truss structure using a frame chord in such a truss base structure includes a ball joint system and a cylindrical joint system.

The ball joint method uses a spherical joint at the truss point, and the cylindrical joint method uses a frame member having a fitting portion formed by crushing both ends at the truss point and a cylindrical joint (hereinafter referred to as a cylindrical joint). The truss base structure is a system having a basic structure using a “cylindrical hub”.
And Japanese Patent Application Laid-Open No. Hei 3-247831. In addition, since the basic structure of the roof body is mainly formed in a triangular shape and partially used in a quadrangular shape for shape adjustment, these are hereinafter collectively referred to as "triangular truss" or "triangle".

FIGS. 17, 19, 21, 23 and 2
FIG. 5 is a plan view showing an example of such an assembling truss base structure, which is shown in FIGS. 18, 20, 22, 24 and 2.
6 is a front view thereof, and FIG. 27 is an exploded perspective view showing a truss mark using a conventional cylindrical hub portion forming the truss mark of this structure.

In these figures, reference numeral 1 denotes a truss base structure having a dome shape or the like, which is constituted by a frame chord 2 which is a large number of truss chords, and a cylindrical hub 3 connecting the frame chords 2. I have. The frame chord 2 is generally made of a light alloy such as an aluminum alloy, and both ends are crushed into a flat shape 2 a by press working or the like, and this portion is used as a connection end 5.

The hub 3 is generally made of an aluminum alloy (for example, A
1-Mg-Si-based alloy) or a cast or forged product formed into a cylindrical shape, a bolt insertion hole 6 formed at the center thereof, and a plurality of radially formed outer circumferential surfaces. A slot 8 which is a fitting groove is formed, and the frame chord 2 is connected to each other by press-fitting the connection end 5 of the frame chord 2 into the slot 8 from the axial direction, so that a truss mark is formed. Is formed.

In the dome-type and mosque-type truss-base structures, cylindrical hubs 3 having slots 8 are used in six places. In the barrel vault-type / flat-structure truss-base structures, eight places are used. The cylindrical hub 3 forming the slot 8 is used, and the cylindrical hub 3 forming the slot 8 is used in nine places in a pyramid type truss structure. It should be noted that the frame chord 2 may not be connected to the slot 8 formed in the cylindrical hub 3 at a portion such as a peripheral end or a column base. In such a case, a slot made of aluminum or plastic may be used. A dummy member called a filler is fitted in the empty slot.

[0008] A long bolt 9 is inserted into the bolt insertion hole 6, and a washer 10 and a ring 11 are fitted to upper and lower protruding ends thereof.
Is pressed against the upper and lower surfaces of the hub 3 to prevent the connection end 5 from falling out of the slot 8, and the truss base structure 1 is constructed by sequentially connecting the truss points. Becomes The bolt insertion hole 6
The long bolt 9 prevents the connection end portion 5 from coming out of the slot 8. However, without providing the bolt insertion hole 6, the retaining member corresponding to the ring 11 is replaced with the cylindrical hub 3.
It is needless to say that the same effect can be obtained even if bolting is performed.

In such a truss base structure 1, in order to construct an arbitrary three-dimensional curved surface, for example, a dome-type or mosque-type truss-base structure, the truss-base structure 1 is fitted into the slot 8 of the cylindrical hub 3 and the adjacent frame chord. Split angle θ between materials 2
Α, vent angle β, twist angle γ and the like formed at the connection end 5 of the frame chord 2 and the frame chord 2 are selectively adjusted according to the truss mark position, the length of the frame chord 2 and the like. . In addition, even if it is a flat structure type or a barrel vault type, these angles may be formed as desired.

Here, as shown in FIG. 26, the coin angle α is the cutting angle of the connection end 5, and the vent angle β is the angle between the axis of the frame chord 2 and the axis of the connection end 5. The twist angle γ is the connecting end 5 of the frame chord 2 connecting the slots 8 between the circular hubs 3 having different heights and different center positions of curvature in the hub axial direction via the frame chord 2.
The angle between them.

Furthermore, distribution as partially quadrilateral frame structure for angulation in the circumferential direction of the truss base structure is illustrated in B _1, B _2, B ₃ in FIG. 17 and FIG. 19 Is established.

As a result, the connection end 5 of the frame chord 2 has a strong axis in the direction perpendicular to the truss surface indicated by the arrow A, that is, in the out-of-plane direction, as apparent from the connection structure with the cylindrical hub 3. A truss base structure having a weak axis in a direction along the truss surface indicated by B and orthogonal to the frame chord 2, that is, in the in-plane direction. Therefore,
The truss base structure using the cylindrical hub 3 is not a general bolt joint type truss structure having spherical pin joints at both ends of the frame chord 2, but a semi-rigid truss structure. Due to this structural characteristic, the prefabricated truss enables a large-scale single-layer dome structure,
A structure of a quadrangular mesh pattern is also made possible.

In such a truss base structure, since the connection end 5 of the frame chord 2 is formed in the center axis direction of the hub 3, the rigidity in the out-of-plane direction is large, but the in-plane direction is large. Therefore, when a compressive or tensile load is applied in the axial direction, the connection end 5 or the cylindrical hub 3 rotates in an in-plane direction, and the connection end 5 is bent. Since the connection end 5 of the frame chord 2 is flattened, the resistance to the rotation of the hub 3 in the in-plane direction is set to a value twice as large as the section modulus based on the thickness of the frame chord 2. It is defined by the yield moment multiplied by the yield stress. Therefore, it is supposed that it is possible to increase the ultimate proof stress by increasing the yield moment.

[0014]

In the truss base structure using the conventional cylindrical hub as described above, even if a load in the height direction is applied to the cylindrical hub 3, the slot 8 is not used.
The frictional force at the fitting portion between the truss and the frame chord 2 is large, so that a strength problem does not occur and a single-layer truss structure can be constructed. When a load in the in-plane direction (circumferential direction) is applied, the connection end portion 5 is formed because the front end portion of the frame chord 2 is crushed.
However, it is difficult to construct a large truss structure because it is predicted that the truss will bend and the truss structure itself will collapse. On the other hand, in the ball joint method, the relationship is reversed, and it is necessary to use a two-layer truss structure.

In order to solve these problems, the present invention inserts a solid or forged fitting member into the end of the frame chord to strengthen the frame chord and to connect the frame chord to the hub. While taking advantage of the rigid joints for out-of-plane loads, this will strengthen the weak points against in-plane loads and prevent buckling failure, and in some cases, regardless of the size of the truss structure, Joint members of frame chords in truss structures that allow the joint members to be used selectively for locations where strength is weak, while allowing the common use of conventional frame chords and cylindrical hubs in other areas It is an object to provide

[0016]

According to the present invention, as a first feature of the present invention, a plurality of fitting grooves corresponding to end shapes of fitting members are provided. And a fitting member comprising a fitting member and a polygonal cylindrical hub, which is a joint member that radially forms the truss chord material. A truss base structure for sequentially connecting and constructing a truss structure is applied, and the fitting member is formed by processing one end into an E-shape or T-shape to fit into the fitting groove, and Is inserted into the opening of the frame chord to form a truss structure.

As a second feature, in the joint member, the fitting member forms a desired coin angle, vent angle or twist angle in a fitting portion formed in a D-shape or a T-shape. is there.

As a third feature, in the joint member, an insertion portion between the fitting member and the frame chord is screwed.

Further, as a fourth feature, in the joint member, the fitting member is fixed to an end of the frame chord by welding.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Several embodiments of a joint member J of a frame chord in a truss base structure according to the present invention will be described below in detail with reference to the drawings. The same reference numerals as those of the related art shown in FIG. 26 are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 1 is a plan view of a roof of a dome-shaped truss structure. The mounting base structure of the roof member R of the dome-shaped truss structure has a skeleton of constituent units. It is composed of a triangular truss T, formed into a spherical shape or the like by a combination of them. Depending on the use of the roofing material, it can be made of glass plate or metal exterior panel, insulation panel with resin foam core, composite fireproof panel, ceramic exterior panel, paper or aluminum etc. A roof panel body 40 such as a honeycomb core panel is appropriately used.

FIG. 2 is an exploded perspective view of a joint portion between the frame chord 2 located at the lower part of FIG. 1A and the joint member J composed of the polygonal cylindrical hub 3A and the fitting member 7. In this figure, the frame chord 2 of the triangular truss T
Shows a form formed on the outer peripheral portion of the polygonal cylindrical hub 3A via the fitting member 7 and rigidly connected to the slot 8A corresponding to the end shape of the fitting member 7.

In this embodiment, one of the fitting members 7 is inserted into the end of the frame chord 2 and fixed by welding or the like.
Is fitted into a slot 8A which is a fitting groove formed on the outer peripheral surface of the polygonal cylindrical hub 3A, so that the rigidity of the frame chord 2 to the polygonal cylindrical hub 3A is enhanced. It was done. One end of the fitting member 7 shown in this embodiment has a T-shaped cut surface shape orthogonal to the axis of the slot 8A of the polygonal cylindrical hub 3A to be fitted, and the material used is particularly limited. It is not limited, but any material may be used as long as it is formed from a rigid solid material or a forged or cast material.

Then, the frame chord 2 into which the fitting member 7 is inserted is fitted into the slot 8A of the polygonal cylindrical hub 3A in a state of being in close contact with the frame chord 2 and bolts formed in the axis of the polygonal cylindrical hub 3 are provided. A long bolt 13 is inserted through the insertion hole 6, the upper and lower surfaces of the polygonal cylindrical hub 3A are sandwiched between the washer 10 and the ring plate 11, and the nut 12 is completely fixed to form a truss base structure.

FIG. 3 is a plan view showing a joint portion in which the frame chord 2 is fitted with the polygonal cylindrical hub 3A via the fitting member 7 as described above, and FIG. 4 is (b)-() of FIG. It is sectional drawing in a b) line | wire. The fitting member 7 is similarly angled as shown in FIG. 26 at the time of molding or fixing to the frame member 2. FIG. 4 shows a form in which a frame chord 2 into which a fitting member 7 having a predetermined coin angle α is inserted is fitted to a polygonal cylindrical hub 3A, and FIG. 5 shows a vent having a predetermined angle of inclination. Although the frame chord 2 into which the fitting member having the angle β is inserted is fitted to the polygonal tubular hub 3A, an arbitrary three-dimensional curved surface of the triangular truss can be formed by adopting such a connection form. This enables construction as a mesh pattern.

FIGS. 6 and 7 are plan views showing another embodiment of the fitting member 7. In this figure, a screw is set on the insertion portion of the frame chord 2 of the fitting member 7 described above. This shows a form in which the fitting member 7 is screwed into the frame chord 2 to further enhance the fixing strength. In addition to this, although not shown, a method of welding and fixing an insertion portion between the fitting member 7 and the polygonal cylindrical hub 3A or a method of inserting a pin material or the like from the outer periphery orthogonal to the axis of the frame chord material 2 is employed. The same effect can be obtained even if reinforcement is achieved by a method of stopping and fixing.

Further, the frame chord 2 can be applied not only to the conventional single tube but also to other forms. For example, the truss structure shown in FIGS. 8 and 9 has a polygonal cylindrical hub having eight slots. A truss base structure having a barrel vault structure made of 3A, and a frame chord 2a used for this truss base structure is formed by arranging hollow tubular members such as aluminum light alloy and the like, and hanging a connecting plate therebetween. It is formed in a so-called eyeglass shape which is stopped (hereinafter referred to as "glass-like frame chord"). In this case, the polygonal cylindrical hub 3 is longer in the axial direction than the single tube frame chord.

FIGS. 10 and 11 show a structural member having one end T.
FIG. 2 is a partially sectional perspective view showing an embodiment of a spectacle-shaped frame chord member 2a having a circular cross section into which a fitting member 7 having a mold cross-sectional shape is inserted. The spectacle-shaped frame chord member 2a of this embodiment is a conventional single tube. As compared with the frame chord material, the tube diameter can be minimized with respect to the desired strength, and the strength in the bending direction of the shaft core can be enhanced. In addition, as another embodiment of the hollow material used for the glasses-like frame chord 2a, as shown in FIGS. 12 to 14, the cross-sectional shape may be a square or a triangle. .
In this case, the eyeglass-like frame chords having a circular or square shape are further supplemented in strength by forming the reinforcing inner piece 2b at a position passing through each axis depending on the use position of the truss base structure. May be.

A truss base structure having such a configuration
Truss structure constructed using joint members for objects
As a representative example of the object 1, for example, as shown in FIGS.
Dome type 81 and the mosque type 82 shown in FIGS.
Usually, the polygonal cylindrical hub 3A of 6 slots 8 has one layer.
used. In these cases, the more you go up from the foundation,
As the dome diameter becomes smaller,
2 and the polygonal cylindrical hub 3A are adjusted to be short.
When the length is less than 50 to 70% of the initial interval,
Frame chord 2 and polygonal cylindrical hub 3A due to cost considerations
In such a site to adjust the interval of
Arrangement A of triangular frame chord 2 and polygonal cylindrical hub 3A
Partially rectangular arrangement B ₁, B_Two, B_ThreeMixed arrangement instead of
It is. For example, in the dome type structure of FIG.
Such a mixed arrangement in three stages (B₁, B_Two, B_Three)But
Have been.

Other types of truss base structures include:
A pyramid type 83 based on a triangle as shown in FIGS. 19 and 20, a barrel vault type 84 shown in FIGS. 21 and 22, a flat type 85 based on a square shown in FIGS. 23 and 24, and the like. Some are usually used as a two-layer structure in terms of strength.

[0031]

As described above, the joint member of the frame chord in the truss base structure of the present invention can be obtained by inserting the fitting member into the end of the frame chord.
By strengthening the ends of the frame chords and connecting with the polygonal cylindrical hub, taking advantage of the rigid connection against out-of-plane loads, reinforcing the weak point against in-plane loads and preventing buckling breakage It is possible to plan. In addition, when applying the joint, the joint member is selectively used in places where the strength is particularly weak, regardless of the size of the truss base building, and in other parts, the conventional frame chord and hub are used. This enables common use. Furthermore, since the desired coin angle or the like is formed by the fitting member itself, it can be processed and manufactured more easily than by processing the frame chord material, and the fitting member is directly screwed or fixed to the frame chord material. By fixing, the rigid contact can be more effectively exerted.

[Brief description of the drawings]

FIG. 1 is a plan view of a partial roof of a dome-shaped truss base structure using a frame chord joint member of the present invention.

FIG. 2 is an exploded perspective view of a joint between a frame chord and a polygonal cylindrical hub, which is one embodiment of the present invention, located at a lower part of FIG.

FIG. 3 is a plan view showing a joint member of the present invention into which a frame chord is fitted.

FIG. 4 shows a form in which a frame chord in which a fitting member having a coin angle α is inserted is fitted to a polygonal cylindrical hub.

FIG. 5 shows a form in which a frame chord in which a fitting member having a vent angle β is inserted is fitted to a polygonal cylindrical hub.

FIG. 6 is a plan view showing another embodiment of the joint member body of the present invention.

FIG. 7 is a side view of FIG.

FIG. 8 is a plan view of a truss base structure of a barrel vault structure using glasses-like frame chords.

FIG. 9 is a front view of FIG.

FIG. 10 is a partial cross-sectional perspective view showing an embodiment of a spectacle-shaped lame chord having a circular cross section.

FIG. 11 is a partial cross-sectional perspective view showing another embodiment of a spectacle-shaped frame chord having a circular cross-sectional shape.

FIG. 12 is a partially sectional perspective view showing another embodiment of a frame-like frame chord having a square cross section.

FIG. 13 is a partial cross-sectional perspective view showing another embodiment of the eyeglass frame chord having a quadrangular cross-sectional shape, in which a mounting position of a reinforcing member is different.

FIG. 14 is a partial cross-sectional perspective view showing another embodiment of a spectacle frame chord having a triangular cross-sectional shape.

FIG. 15 is a plan view of a dome-shaped structure as a first example of the truss base structure.

FIG. 16 is a front view of FIG.

FIG. 17 is a plan view of a mosque-type structure as a second example of the truss base structure.

18 is a front view of FIG.

FIG. 19 is a plan view of a pyramid-shaped structure as a third example of the truss base structure.

FIG. 20 is a front view of FIG. 19;

FIG. 21 is a plan view of a barrel vault type structure as a fourth example of the truss base structure.

FIG. 22 is a front view of FIG. 21;

FIG. 23 is a plan view of a flat structure as a fifth example of the truss base structure.

FIG. 24 is a front view of FIG. 23.

FIG. 25 is an exploded perspective view showing a conventional hub portion forming a truss mark.

26A and 26B are conceptual views showing the angle setting of a conventional truss chord member and a hub.

[Explanation of symbols]

 T Triangular truss R Roof member J Joint member body 1 Truss base structure 2 Frame member 2a Glass-like frame chord material 3 Hub 3A Polygonal cylindrical hub 5 Fitting member 8 Slot (fitting groove) 40 Panel body 81 Dome truss structure Object 82 Mosque type truss structure 83 Pyramid type truss structure 84 Barrel vault type truss structure 85 Flat structure type truss structure

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-247831 (JP, A) JP-A-4-34317 (JP, U) JP-A-2-98121 (JP, U) (58) Investigation Field (Int.Cl. ⁷ , DB name) E04B 1/32 102 E04B 1/19 E04B 1/58

Claims (4)

(57) [Claims] 1. A joint member comprising: a polygonal cylindrical hub which is a joint member for radially forming a plurality of fitting grooves corresponding to end shapes of the fitting member; and a fitting member. The present invention is applied to a truss base structure that sequentially connects a cylindrical hub to an end of a frame chord, which is a truss chord, via a fitting member to form a truss structure, wherein the fitting member has one end. A truss structure, which is formed into a D-shape or T-shape and fitted into the fitting groove, and the other end is inserted into the opening of the frame chord material to form a truss structure. A frame chord joint member in a base structure. 2. The joint member according to claim 1, wherein the fitting member forms a required coin angle, vent angle, or twist angle at a fitting portion formed into a D-shape or a T-shape. The joint member of a frame chord in the truss base structure according to claim 1, characterized in that: 3. The truss base structure according to claim 1, wherein said fitting member is screwed and fixed to an end of said frame chord material. Frame chord joint member. 4. The truss base structure frame according to claim 1, wherein said fitting member is welded and fixed to an end of said frame chord member. String joint member.