JP3849475B2 - Three-dimensional truss - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a three-dimensional truss that can be used for a roof of a large span structure such as a factory or a warehouse.
[0002]
[Prior art]
As an example of such a conventional roof structure, there is an invention disclosed in Japanese Patent Application Laid-Open No. 62-25655. A self-supporting component for forming a roof surface according to the present invention includes a V-shaped composite heat insulating plate, a truss frame formed in a V shape using three tubular members (steel pipes) that support the composite heat insulating plate as chords, and those It consists of metal fittings.
[0003]
This roof structure requires a large metal folded plate roof for constituting a V-shaped composite heat insulating plate, which is assembled to sandwich a composite heat insulating material to constitute a large composite heat insulating panel. And since this composite heat insulation panel itself cannot support external force, a tubular member is assembled into a V-shaped truss shape along the composite heat insulation panel to support a large span. It is assembled with a heat insulating panel using a special joint metal (prior art 1).
[0004]
Japanese Patent Application Laid-Open No. 7-217218 discloses an invention relating to a large span roof and a method for installing the roof. The present invention uses a truss structure assembled in a V shape by one lower chord member and two upper chord members, connects the two upper chord members with a horizontal member, and also comprises a V-shaped truss and a horizontal member. Units are arranged at intervals, and the top and bottom of each unit are further connected with a horizontal member, and members and parts for receiving a roof plate are attached to the upper part composed of the upper chord member and the horizontal member, and the roof is attached thereon. (Prior Art 2).
[0005]
[Problems to be solved by the invention]
The large metal folded-plate roof, the composite heat insulation panel, the truss and the joining hardware made of the tubular member in the prior art 1 are both cumbersome and expensive to manufacture. Therefore, in the recent environment where cost reduction is required. It is hardly implemented.
[0006]
Further, in the prior art 2, it is very difficult to manufacture a V-shaped truss with one lower chord member and two upper chord members. In other words, when a V-shaped truss is assembled into a V-shaped opening angle of around 60 degrees, it is extremely difficult to ensure accuracy over a large span (several tens of meters) because many lattice materials are attached by welding. is there. In the above-mentioned prior art 1, as can be seen from the fact that a square steel pipe is used as the lower chord material and the chord material is welded at an angle of 90 °, the lattice material is welded to the chord material, such as 60 °. In order to perform reliable welding at an angle, special processing is required for the joint, which is not realistic.
[0007]
Two types of horizontal members are used, but one of the horizontal members is for fixing a V-shaped truss, and the other horizontal member is for connecting two truss units. Both are necessary for securing the shape at the time of construction and lifting in one piece, but the horizontal members themselves cannot support the roof. Don't be.
Also, the horizontal member connecting the lower chord material cannot bear the same other role. For example, if a ceiling is to be provided, a separate member having high rigidity must be hung over the lower chord material. Thus, in the prior art 2, the member which is not economical is used.
[0008]
Furthermore, in the prior art 2, an extremely large number of dedicated members, parts, and joining methods are used, and an increase in cost is inevitable. In addition, because the roof has a mounting member and a roof plate (folded plate roof) at the upper end of the truss unit, the height of the roof part (the sum of hardware and roofing materials) is added to the height of the truss unit. In addition, the roof as a whole becomes quite high.
[0009]
In addition, the roof surface must have horizontal rigidity in order to pass the force to the surrounding load-bearing elements (seismic wall, wind-resistant wall, or structure that sends the force to the ground by a rigid frame) during an earthquake or storm. Such a problem cannot be solved by a simple connecting horizontal member as described in the official gazette without description or examples. In such a case, in general, the horizontal brace is spanned between the upper and lower 6 members and the upper 15 member, which not only makes the structure extremely complicated, but also provides an openable window and aesthetics described in the publication. It will be damaged.
[0010]
The present invention has been made to solve the above-described problems, and can be easily manufactured with high accuracy with a reasonable structure without duplication of members, and without using special parts or the like. The object is to provide a low-cost and highly reliable three-dimensional truss by ensuring rigidity.
[0011]
[Means for Solving the Problems]
In the three-dimensional truss according to the present invention, an upper chord material and a lower chord material made of angle steel are arranged on the same vertical line, and an upper side of the upper chord material and a lower side of the lower chord material are arranged in parallel. A plane truss formed by joining the lower truss members or upper chord members together to form a V-shaped truss, and a plurality of these V-shaped trusses are disposed. configure the folded plate-shaped truss by joining the upper chord member with each other or the lower chord member to each other of the adjacent V-shaped truss beam members having a bolt insertion hole corresponding to the bolt insertion holes provided in front Kitaba material in the longitudinal direction and those joined together by using the contact the bolt insertion hole flux material of the folding plate-like truss.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
[Embodiment 1]
1 is a perspective view of a solid truss according to Embodiment 1 of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a front view of a flat truss constituting the solid truss.
In the figure, reference numeral 1 denotes a three-dimensional truss, a folded plate-like truss 11 formed by horizontally joining a plurality of V-shaped trusses 10 obtained by joining planar trusses 2 in a V shape, and a bundle of the folded plate-shaped trusses 11. It is comprised by the beam material 15 fixed to the material.
[0015]
The plane truss 2 is disposed orthogonally between an upper chord member 3 and a lower chord member 4 made of a steel material having an angled cross section having two orthogonal sides (hereinafter referred to as an angle iron), and between the upper chord member 3 and the lower chord member 4; A bundle 5 made of angle steel whose both ends are welded to each other, and the upper chord 3 and the lower chord 4 are disposed obliquely between the bundle 5 and both ends are welded to each other. It consists of the diagonal 6 which consists of angle steel. In this case, the upper chord member 3 and the lower chord member 4, and the bundle member 5 and the diagonal member 6 are brought into contact with each other as shown in FIG. 4, and can be easily joined by fillet welding.
[0016]
5 is a cross-sectional view taken along the line AA in FIG. One side of the upper chord member 3 and the lower chord member 4 made of angle steel (hereinafter referred to as the upper side 31 and the lower side 41) is parallel, and the other side (hereinafter referred to as the side sides 32 and 42) is located on the same vertical line. In addition, they are arranged symmetrically so that the corners face inward, and a bundle member 5 and a diagonal member 6 (not shown) are welded between them. A bolt insertion hole 7 is provided near the upper chord member 3 on the side perpendicular to the longitudinal direction of the flat truss 2 of the bundle member 5.
[0017]
As shown in FIG. 6, the flat truss 2 thus configured has a lower chord 41 of the lower chord member 4 of one flat truss 2a held vertically and a lower chord member 4 side of the other flat truss 2b held horizontally. The sides 42 are brought into contact with each other, the bolts 8 are inserted into bolt insertion holes 43 provided beforehand in both sides and fixed with nuts, and the two plane trusses 2a and 2b are orthogonally joined together. Thereby, the substantially V-shaped V-shaped truss 10 is formed. In addition, in joining the lower chord material 4 of the plane trusses 2a and 2b, it may be joined by welding instead of the bolt joining.
[0018]
Next, as shown in FIG. 7, a plurality of V-shaped trusses 10 are juxtaposed, and the upper side 31 of the upper chord material 3 of one flat truss 2b of the V-shaped truss 10a and the flat truss of the V-shaped truss 10b adjacent thereto. The side 32 of the upper chord material 3 of 2a is joined by the bolt previously inserted in the bolt insertion hole provided in both, or is joined by welding. In this way, the upper chord material 3 of the flat trusses 2a or 2b of the plurality of V-shaped trusses 10 are sequentially joined to form a folded plate-like truss 11.
[0019]
Next, the beam member 15 is attached to the folded plate-shaped truss 11 formed as described above as shown in FIG. The beam member 15 is made of, for example, a lip groove steel, and in the longitudinal direction thereof, a bolt insertion hole corresponding to the bolt insertion hole 7 provided in the bundle member 5 of each flat truss 2 of the folded plate-shaped truss 11. 16 is provided.
The beam 15 is brought into contact with the side of the bundle 5 of the folded plate-shaped truss 11 as indicated by a broken line, and the bolts 8 are inserted into the bolt insertion holes 7 and 16 and fixed with nuts. Thereby, the three-dimensional truss 1 as shown in FIG. 1 and FIG. 2 can be formed.
[0020]
In the above description, a case where angle steel is used for the bundle 5 and the diagonal 6 is shown, but a hollow steel material having a square cross section (hereinafter referred to as square steel) may be used for both or one of them.
Moreover, although the case where the lower chord material 4 of the plane truss 2 is joined together to form the V-shaped truss 10 has been shown, the upper chord material 3 may be joined together to form the V-shaped truss 10. In this case, the bolt insertion hole 7 of the bundle material 5 may be provided closer to the lower chord material 4.
Thereby, the folded-plate-shaped truss 11 can be formed by joining the lower chord members 4 of the V-shaped truss 10 (the same applies to the following embodiments).
[0021]
According to the present embodiment, the V-shaped truss 10 is configured by joining the lower chord members 4 or the upper chord members 3 of the plane truss 2, and the upper chord members 3 or the lower chord members adjacent to each other in the V-shaped truss 10. Since the folded plate-shaped truss 11 is formed by joining the beam members 15 to the bundle member 5, the three-dimensional truss 1 can be easily configured with high accuracy without using special hardware or the like. can do.
[0022]
Further, in the longitudinal direction of the beam member 15, bolt insertion holes 16 are provided corresponding to the bolt insertion holes 7 provided in the bundle member 5 of the folded plate-shaped truss 11, and both the bolt insertion holes 7, 16 are aligned to provide a beam. Since the material 15 is bolted, the design dimensions can be managed without asking when the solid truss 1 is assembled, and the out-of-plane rigidity in the span orthogonal direction can be secured.
Thus, according to the present embodiment, a low-cost and highly reliable three-dimensional truss 1 that can be used for a roof of a large span structure such as a factory or a canteen can be configured with a simple structure. .
[0023]
[Embodiment 2]
In the first embodiment, angle steel is used for the upper chord material 3 and the lower chord material 4, and the upper and lower sides 31, 41 are parallel, the side sides 32, 42 are positioned on the same vertical line, and the bundle is made of angle steel. Although the case where the flat truss 2 is formed by integrally joining with the material 5 and the diagonal member 6 has been shown, the flat truss is formed as follows in the present embodiment.
[0024]
That is, as shown in FIG. 9 (FIG. 9 corresponds to the AA cross section of FIG. 3), the upper side 31 of the upper chord member 3 made of angle steel and the lower side 41 of the lower chord member 4 are parallel to each other, and the side sides 32 and 42 are formed. They are positioned opposite to each other, and are arranged so that the corners of the truss face inward on the upper and lower diagonals of the truss, and are integrally joined by a bundle 5 made of square steel and a diagonal 6 (not shown). Thus, a flat truss 2 is formed.
[0025]
In this case, the tip of the upper side 31 of the upper chord material 3 and the outer wall surface of the side edge 42 of the lower chord material 4, the outer wall surface of the side 32 of the upper chord material 3, and the tip of the lower side 41 of the lower chord material 4 are substantially the same. Located on the vertical line. A bolt insertion hole 7 is provided near the upper chord member 3 of the bundle member 5. In the above description, the case where square steel is used for the bundle material 5 and the diagonal material 6 is shown, but angle steel may be used for both or one of them.
[0026]
As in the case of the first embodiment, the flat truss 2 configured as described above has two flat trusses 2a and 2b arranged orthogonally as shown in FIG. 3 are joined together by bolts 8 or welding to form a V-shaped truss 10, and the upper chord members 3 or lower chord members 4 of adjacent V-shaped trusses 10 are joined together by bolts or welding to form a folded plate-shaped truss 11. Form. Then, as shown in FIG. 11, the bolt insertion hole 7 provided in the bundle member 5 of the folded plate-shaped truss 11 and the bolt insertion hole 16 provided in the beam member 15 corresponding to the bolt insertion hole 7 are aligned with each other by a bolt. The three-dimensional truss 1 is formed by joining.
The operations and effects in the present embodiment are the same as those in the first embodiment.
[0027]
[Embodiment 3]
In the first and second embodiments, the case where angle steel is used for the upper chord member 3 and the lower chord member 4 of the flat truss 2 is shown. However, the flat truss 2 according to the present embodiment has the upper chord member 3 and the lower chord member 4. In this case, square steel is used.
That is, as shown in FIG. 12, the upper side 31 of the upper chord material 3 made of square steel and the lower side 41 of the lower chord material 4 made of square steel are arranged in parallel and the side sides 32 and 42 are positioned on the same vertical line. And a flat truss 2 is formed by joining a bundle member 5 and a diagonal member 6 (not shown) made of angle steel or square steel between them.
[0028]
As in the case of the first and second embodiments, the flat truss 2 configured as described above has two flat trusses 2a and 2b arranged at right angles as shown in FIG. The upper chord members 3 are joined by bolts 8 or welding to form a V-shaped truss 10, and the upper chord members 3 or lower chord members 4 of adjacent V-shaped trusses 10 are joined by bolts 8 or welding to form a folded plate. A truss 11 is formed. And as shown in FIG. 14, the bolt insertion hole 7 provided in the bundle material 5 of the folded plate-shaped truss 11 and the bolt insertion hole 16 provided in the beam material 15 corresponding to this are joined, and it uses a bolt. The three-dimensional truss 1 is formed by joining.
The operation and effects of the present embodiment are almost the same as those of the first embodiment.
[0029]
【The invention's effect】
In the three-dimensional truss according to the present invention, an upper chord material and a lower chord material made of angle steel are arranged on the same vertical line, and an upper side of the upper chord material and a lower side of the lower chord material are arranged in parallel. A plane truss formed by joining the lower truss members or upper chord members together to form a V-shaped truss, and a plurality of these V-shaped trusses are disposed. Adjacent V-shaped truss upper chord members or lower chord members are joined together to form a folded plate-shaped truss, and a beam member having bolt insertion holes corresponding to bolt insertion holes provided in the bundle member in the longitudinal direction. Since it is in contact with the bundle member of the folded plate-shaped truss and joined integrally using the bolt insertion hole, the design dimensions can be easily managed when assembling the three-dimensional truss, Rigidity can be ensured.
[Brief description of the drawings]
FIG. 1 is a perspective view of a three-dimensional truss according to Embodiment 1 of the present invention.
FIG. 2 is a front view of FIG. 1;
3 is a front view of a flat truss that forms the three-dimensional truss of FIG. 1. FIG.
4 is an explanatory view showing an example of joining of a bundle material and an oblique material in FIG. 3; FIG.
5 is a cross-sectional view taken along line AA in FIG.
FIG. 6 is an explanatory diagram of a procedure for assembling a flat truss to form a V-shaped truss.
FIG. 7 is an explanatory diagram of a procedure for assembling a V-shaped truss to form a folded plate-shaped truss.
FIG. 8 is an explanatory diagram of a procedure for joining a beam material to a folded plate truss.
FIG. 9 is a longitudinal sectional view of a plane truss according to Embodiment 2 of the present invention.
FIG. 10 is an explanatory diagram of a procedure for assembling a flat truss to form a V-shaped truss.
FIG. 11 is an explanatory diagram of a procedure for forming a three-dimensional truss by assembling a V-shaped truss.
FIG. 12 is a longitudinal sectional view of a plane truss according to Embodiment 3 of the present invention.
FIG. 13 is an explanatory diagram of a procedure for assembling a flat truss to form a V-shaped truss.
FIG. 14 is an explanatory diagram of a procedure for assembling a V-shaped truss to form a three-dimensional truss.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Three-dimensional truss 2 Plane truss 3 Upper chord material 31 Upper side 32 Side 4 Lower chord material 41 Lower side 42 Side 43 Bolt insertion hole 5 Bundling material 6 Diagonal material 7 Bolt insertion hole 10 V-shaped truss 11 Folding plate-like truss 15 Beam material 16 Bolt insertion hole

Claims (1)

An upper truss material and lower chord material made of angle steel are arranged on the same vertical line, and an upper truss material and a lower chord material are arranged in parallel with a parallel truss between them. The flat truss is arranged perpendicularly, the lower chord members or the upper chord members are joined together to form a V-shaped truss, and a plurality of these V-shaped trusses are arranged to adjoin the upper chord member of the adjacent V-shaped truss. Join each other or lower chords together to make a folded plate-shaped truss,
The beam members having a bolt insertion hole corresponding to the bolt insertion holes provided in front Kitaba material longitudinally and joined together by using the contact the bolt insertion hole flux material of the folding plate-like truss A three-dimensional truss characterized by that.

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