JPH0553903B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention has an X-shaped belly member between the upper and lower chord members, and also crosses the X-shaped belly members at the intersection portions of the unit frame members to create a bundle material. This relates to a space truss that does not have a space truss.

[Problem that the invention seeks to solve]

FIG. 6 shows a conventional three-dimensional truss in which unit frame members A', in which upper and lower chord members a and a are connected by a belly member b, are arranged in a crisscross pattern. In this three-dimensional truss, in order to ensure the joint strength between the belly member b and the upper and lower chord members a, a, a gusset plate P is used at the joint, and at the intersection of the unit frame member A', the upper and lower chord members a, a Bundling material c and gusset plate P are used to join the bottom material b and bundle material C' is also used in the middle part, so the structure of the joint part is complicated and the processing and assembly time is considerable. .

This invention was developed to improve the above-mentioned conventional three-dimensional truss structure, and eliminates the gusset plate at the joint between the chord and belly members and the bundle at the intersection of the unit frame members, simplifying the structure and reducing weight. It was successful.

[Structure of the invention]

The configuration of the three-dimensional truss that is the gist of this invention is as follows. That is, the unit frame member A is formed into a truss shape by upper and lower chord members 1, 1 and an X-shaped belly member 2 whose both ends are stacked on the web surfaces of the upper and lower chord members 1, 1 and connected directly by welding or bolts. The unit frame material A, in which the upper and lower chord members 1 and 1 are joined by overlapping the splicing plate 3, and the two sets of X-shaped belly members 2 and 2 at the intersecting parts of the unit frame members are located in the middle, respectively. They are crossed at four parts of the planar cross-shaped joint fittings.

〔Example〕

The unit frame material A consists of upper and lower chord members 1, 1 made of cut T-shaped steel or the like, and an X-shaped belly member 2 that forms an X shape when viewed from the side. The ends of the belly members 2 are overlapped and directly connected by welding or bolt connection without using a gusset plate to form a truss shape.

Unit frame material A is constructed by assembling two unit frame materials into a T-shape, H-shape, etc. into three unit frame materials. The unit frame material A is arranged so that the ends of the upper and lower chord members 1, 1 in one direction abut against the sides of the upper and lower chord members 1, 1 in the other direction, and the upper and lower chord members 1 are connected using the upper and lower splinters 3. Then join and intersect. In addition, the two sets of X-shaped belly members 2 at the intersection parts of the unit frame members A and A are intersected,
In this case, a joining fitting 4 having a planar cross shape, that is, flanges on four perpendicular sides, is used in the middle. A through hole 5 is provided in the center of one direction of this joining metal fitting 4, and the belly material 2 in one direction is arranged to pass through this through hole 5, and the belly material 2 in the other direction is provided with a flange of the joining metal fitting 4. to be joined by bolts, nuts or welding. The bottom material 2 can also be joined to joining fittings in both directions.

Side beams 6 are arranged around the above three-dimensional truss to support the axial force acting on the upper and lower chord members 1.

〔Effect of the invention〕

The present invention has the above-mentioned configuration, and the unit frame members are assembled in a truss shape using X-shaped belly members that overlap the web surfaces of the upper and lower chord members and directly weld or bolt their respective ends. It is possible to obtain a structure without using a gusset plate, and by disposing two sets of intersecting X-shaped belly members and planar cross-shaped joint fittings at the intersection of the unit frame members, and without using bundle members.

Therefore, the installation and attachment of the gusset plate requires less effort, resulting in lighter weight and labor-saving work.

In addition, the unit frame members are joined together by joining the chord members together and the bottom members together, and the structure is simplified because there is no bundle material.

Therefore, the structural design becomes clearer, manufacturing and erection becomes easier, and the weight of the steel frame can be reduced compared to conventional structures.

[Brief explanation of the drawing]

Figure 1 is a front view, Figures 2 and 3 are -,
4 is a perspective view of a main part, FIG. 5 is a perspective view of an edge, and FIG. 6 is a front view of a conventional example. A... Unit frame material, B... Ridge, 1... Chord material, 2...
...Body material, 3...Splicing plate, 4...Joining metal fittings, 5...Through hole, 6...Side beam.

Claims (1)

[Claims] 1 The unit frame member A is formed into a truss shape by upper and lower chord members 1, 1 and an X-shaped belly member 2 whose both ends are stacked on the web surfaces of the upper and lower chord members 1, 1 and connected directly by welding or bolts. The unit frames A, A are made by combining the upper and lower chord members 1, 1 together with splicing plates 3, and the two sets of X-shaped belly members 2, 2 at the intersection of the unit frames A, A are as follows: A three-dimensional truss characterized by intersecting each other at four planar cross-shaped joint fittings located in the middle.