JP2523927Y2 - Network structure of space truss - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION This invention relates to a mesh structure of a space truss constituting a folded-plate roof, a mountain-shaped roof, and the like in Ocho-ma building.

Problems to be Solved by the Invention A frame member 1 is formed by connecting linear upper and lower chord members 4 and 5 with a bellows member 6 to a truss structure that has been conventionally implemented.
In a three-dimensional truss which is joined in a cross-like manner so as to form a lattice-like mesh when viewed in a plane, the lower chord material 5 is equally divided at the L1 between the eaves beam 3 and the ridge beam 2 and the frame materials 1, 1 are joined in a cross-like manner. Y
There is a structure that is made by laying out and joining. In this structure, as shown in FIGS. 1A and 1B, since the web portion of the eaves beam 3 and the web portion of the ridge beam 2 are not parallel when viewed from the upright side, the upper chord material 4 and the lower chord material 5 connected to the ridge beam 2 at the ends. When viewed from the direction perpendicular to the upper chord member 4 and the lower chord member 5, the nodes are shifted vertically as shown in FIG. 1A, and are close to the ridge 2 of the frame member 1 as shown in FIGS. The upper and lower chords 4,5 were twisted at the part. In this structure, it is not easy to manufacture and assemble the frame member 1 and many man-hours are required.

Therefore, the applicant first tried to solve the above problems by
As shown in JP-A-57-5362, a structure was developed in which the upper chord ends of the frame material were connected by a connecting material at the ridge.

This invention is devised to achieve the same object as that shown in the above-mentioned publication by another structure.

Configuration of the Invention The gist of the invention is that the mesh structure of a space truss is a straight line between a vertically arranged I-shaped section ridge 2 and an I-shaped section eave beam 3 arranged at right angles to the roof slope. A three-dimensional truss formed by connecting the upper and lower chord members 4 and 5 with a frame material 1 and connecting them with an abdominal material 6 to form a lattice-like mesh in a crossing manner and to form a mountain-shaped roof, Intersection points X1, X2 on the extension of the axis of the upper chords 4, 4 of the adjacent frame 1,1
Are the above-mentioned ridge beam 2 and eave beam 3 upper surface flange core O and frame material 1
Along the upper surface flange on the side opposite to the mounting side of the mounting side is provided so as to be located between the edges, and at the position where these intersections X1 and X2 are equally divided, a node Y for joining the frame members 1 and 1 in an intersecting manner is provided. is there.

Embodiment An embodiment of the present invention is as shown in FIG. The construction of this embodiment comprises a vertically arranged I-shaped section ridge 2 and an I-shaped section eave beam 3 arranged at right angles to the roof slope.
The space between the upper and lower chord members 4 and 5 is connected by a belly member 6 with the frame member 1 and joined in an intersecting manner so as to form a lattice-like mesh when viewed in a plane, thereby forming a mountain-shaped roof. Intersections X1 and X2 on the extension line of the axes of the upper chords 4 and 4 of the adjacent frame members 1 and 1 are three-dimensional trusses. The upper and lower chord members 4 and 5 of the frame members 1 and 1 are joined in an intersecting manner at the same intersection X1 and X2 at the same intersection X1 and X2. The frame material 1 is located at a position where the space is equally divided.
A mesh having nodes joining the 1s in an intersecting manner is formed. A bundle member 7 is provided at a node Y of the assembly cross joining of the frame members 1 and 1 as necessary.

Also, the intersection X1 of the center of gravity G1, G1 of the frame material 1, 1 and the center of gravity G2 of the ridge 2 to be joined in this space truss,
The intersection X2 of the center of gravity line G1, G1 of 1,1 and the center of gravity line G3 of eaves beam 3 is the ridge beam 2.
And between the core O of the eaves beam 3 and the edge of the upper surface flange on the side opposite to the mounting side of the frame material 1, and these intersections X
Lines G4 and G4 drawn from 1, X2 are drawn in parallel with the web portion 3-1 of the eaves beam 3 as shown in FIG. Line A intersecting with the extension line
The shape formed by 1, A2 forms a parallelogram, the length between the intersections X1 and X2 is equally divided and the nodes Y are allocated, and the frame material 1, the ridge beam 2 and the eave beam 3 Constitutes a mesh. Note that the length of the lower chord member 5 changes in accordance with the roof gradient and is slightly shorter than the upper chord member 4.

Further, the flange 4-1 of the upper chord 4 and the planting flange 2-1 of the ridge 2 are connected by a gusset plate 7-1, and the flange 5-1 of the lower chord 5 and the lower flange 2-2 of the ridge 2 are connected.
Are connected by a gusset plate 7-2, and the lower gusset plate 7-2 has a wider surface than the upper gusset plate 7-1 as shown.

Effect of the Invention The invention consists of the above structure, and the intersection of the straight line of the upper chord with the ridge beam and eave beam on the extension of the axis of the upper chord material, that is, the center of gravity line of the ridge beam, eave beam and the frame material The intersection is located between the upper flange core of the ridge beam and eave beam and the upper flange edge opposite to the mounting side of the frame material, and the upper and lower chord materials are up and down when viewed from the direction perpendicular to the roof slope It will be in an overlapped state, and there will be no vertical displacement at the above-mentioned nodes. And, since the length was divided into equal lengths and the nodes for cross-joining the frame members were assigned, the upper and lower chord members twisted at the joint between the frame member and the ridge beam as seen in the conventional structure. Therefore, the frame material constituting the three-dimensional truss is straightened, so that it is easy to manufacture, and the transmission of the axial force is performed smoothly.

[Brief description of the drawings]

1A and 1B are plan and elevation views of a conventional example, and FIGS. 1C and 1D are I and II.
2A, 2B, and 2C are plan and elevation views of the present invention, and FIGS. 3A, 3B, 3C, and 3D are plan and elevation views showing details of FIG. . 1 ... unit frame material, 2 ... ridge beam, 3 ... eave beam, 4 ... upper chord material, 5 ...
Lower chord material, 6 ... belly material, 7 ... bundle material.

Claims (1)

(57) [Scope of request for utility model registration] A straight upper and lower chord members (4, 5) are connected by an abdominal member (6) between a vertically arranged I-shaped section ridge beam (2) and an I-shaped section eave beam (3) arranged at right angles to the roof slope. Is a three-dimensional truss formed by joining frame members 1 formed in a cross-like manner so as to form a grid-like mesh when viewed in a plane and forming a mountain-shaped roof.
The intersections X1 and X2 on the extension of the axes of the upper chords 4 and 4 of the upper chords 1 and 4 are located between the upper flange core O of the ridge 2 and the eaves 3 and the upper flange end opposite to the mounting side of the frame 1. A mesh structure of a space truss, characterized in that it is provided so as to be located, and a node Y for joining the frame members 1 and 1 in an intersecting manner is provided at a position where the intersections X1 and X2 are equally divided.