JPH0444721Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a joint structure in a three-dimensional truss structure in which the top chord of the truss frame member parallel to the center of the structure is also used as the purlin material.

[Problem that the invention attempts to solve]

In three-dimensional truss structures that form a triangular network using truss frame members that connect upper and lower chord members with lattice members, the upper chord members that gather at the nodes of the network are usually all connected at the same level to the joining hardware that connects the upper chord members. However, with this joint structure, a new purlin material must be installed on the upper chord member, and especially in the case of large structures, an increase in the number of installed purlin materials and their weight is a problem.

This idea was made based on the actual situation of conventional joint structures, and by raising the top chord of the truss frame member parallel to the ridge center above the level of the top chord in other directions, the above-mentioned disadvantages were solved and the structure The idea is to make things lighter.

[Means for solving problems]

In this invention, the top chord of the truss frame, which is placed parallel to the ridge center, is joined to the top surface of the joining hardware placed at the node positions of the triangular mesh by protruding upward from the top surface of the top chords in the other two directions. By doing so, it is possible to reduce the number of components and the weight of the structure without installing new main building materials.

The top chord of the truss frame parallel to the ridge center protrudes upward from the top surface of the joining hardware, so the top chord of the truss frame in one direction doubles as the purlin material that receives the roofing material, allowing the purlin material to be reinstalled. It becomes unnecessary to do so, or the quantity can be significantly reduced.

The upper chord member projecting upward is bolted to the joining hardware directly or via a plate or the like.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment.

The joint structure of this invention is constructed by assembling truss frame materials A into a triangular mesh as shown in Fig. 1, and in a three-dimensional truss structure, a truss parallel to the ridge center is attached to the upper surface of the joint metal fitting 1 placed at the node position. Frame material
Upper chord members 2 _p , 2 _p parallel to the ridge center of A _p are joined by projecting upwards than upper chord members 2 , 2 in other directions, and these upper chord members 2 _p , 2 _p are also used as purlin materials. It is something.

In FIG. 1, the circles represent the joining hardware 1, and the line segments represent the upper chord members 2 _p , 2 _p , 2, 2, respectively. Among them, the one placed on the top surface of the circle is the upper chord member 2 _p ,
The other is the upper chord material 2.

The truss frame member A is made by connecting an upper chord member 2 and a lower chord member 3 with a lattice member 4, and a joining hardware 1 is horizontally attached to the upper end of a joining member B that connects the truss frame members A and A gathered at a node. Of these, the truss frame material A _p is placed parallel to the ridge center.

This joining member B is composed of a lower joining hardware 1' that connects the bundle material 5, joining hardware 1, and lower chord members 3, 3, and a gusset plate 6 that is joined to the inside of the joining hardware 1 and the lower joining hardware 1'. has been done.

The truss structure is constructed using this joint member B at the construction site.
It is formed by connecting the truss frame members A and A.

In the embodiment shown in FIG. 2, the protruding upper chord members 2 _p and 2 _p are bolted directly to the upper surface of the joining metal fitting 1 at their flanges, and the webs are made to protrude upward.
In this case, the roof material C will be connected to the webs of the upper chord members 2 _p and 2 _p via attachment pieces,
Since the centroids of the upper chord members 2 _p and 2 _p are lowered, there is an advantage that the eccentric moment when a horizontal force is applied is reduced.

The upper chord members 2, 2 in the other two directions are bolted to the joining hardware 1 by means of joint plates 7, as shown in FIG. 2, and are connected to the joining hardware 1 at the same level. In this figure, the XX-X direction arrow view and the Y-Y line direction arrow view are shown.

In the embodiment shown in Fig. 3, the upper chord members 2 _p and 2 _p are connected to the metal fitting 1.
The web is joined via a plate 8 to have a protruding flange. In this embodiment, the roof material C can be directly connected to the upper chord members 2 _p and 2 _p .

Fig. 4 shows how folded plates are installed as roofing material C on top of the upper chord members _2p and _2p . The two-dot chain line between the upper chord members 2 _p and 2 _p arranged in parallel in the figure indicates that a purlin material may be inserted as necessary, especially when the distance between the upper chord members 2 _p and 2 _p becomes large in a large mesh structure. show.

[Effect of idea]

This idea is as described above, and the top chord of the truss frame parallel to the ridge center is made to protrude upwards from the top chord of the truss frame in the other direction and joined to the joining hardware, and the purlin material is attached to this top chord. Since the upper chord members of the truss frame members in all directions are placed at the same level, it is possible to eliminate or reduce the need for purlin materials, and at the same time, the weight of the frame can be reduced. In particular, in the case of large structures, the effect of reducing the number of installed main building materials and weight reduction is significant, and it is also possible to shorten the construction period.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the mesh of the truss structure, Figs. 2 and 3 show examples of the present invention, where is a plan view, , is a view taken along the X-X line, and FIG. 4 is a schematic diagram showing an example of installing roofing materials. A...Truss frame material, A _p ...Truss frame material, B...
...Joining member, C...Roofing material, 1...Joining hardware,
1'...Lower joint hardware, _2p , 2...Top chord material, 3...
...Lower chord material, 4...Lattice material, 5...Bundle material, 6...
Gusset plate, 7... joint plate, 8... plate.

Claims (1)

[Scope of utility model registration request] In a three-dimensional truss structure in which a triangular mesh is formed by a truss frame member made by connecting upper and lower chord members with lattice members, the upper chord member of the truss frame member arranged parallel to the ridge center is set at the node position of the triangular network. A joint in a three-dimensional truss structure, characterized in that the top chord of a truss frame member in another direction is joined to the upper surface of the joint metal fitting disposed in such a way that it protrudes upward from the upper chord member, and the upper chord member also serves as a purlin member. structure.