JPS5926002Y2 - three-dimensional truss - Google Patents

Description

[Detailed description of the invention] This invention relates to a three-dimensional truss that forms the roof of the large room.

The applicant previously developed a truss in which the intersection points of the upper chords of a wickerwork planar truss were connected diagonally with rods, and the midpoints of the rods and the intersections of the lower chords were connected with diagonals.

(Utility Model Publication No. 47-8754) This invention is a development of the above-mentioned invention, and its details will be explained below with reference to illustrated embodiments.

The basic shape of the truss according to this invention is as shown in FIG. 1, in which the upper and lower chord members 1 and 2 form a mesh-like lattice with the same shape above and below, for example, a square, rectangular, or diamond-shaped lattice.

Further, the upper chord member 1 and the lower chord member are connected by a bundle member and/or a belly member 3.

Then, in the lattice formed by the upper chord members 1, the intermediate point A of the adjacent upper chord members 1, 1, and the receiving members 4, 4 parallel to each other between A.
The intermediate point B of this receiving member 4 and the intersection point of the lower chord member 2 are connected by diagonal members 5 and striking members 6.

That is, in the illustrated embodiment, the sides of the upper square,
The midpoints of adjacent members are connected by parallel members, and the midpoints of the members and the corners of the lower square are connected by diagonal members.

The belly material 3 is not limited to the diagonal material as shown in the figure, but may be a bundle material.

When the above basic shapes are connected and assembled, they can be arranged as shown in FIG. 2 or 3.

Note that a purlin material ALC board, a folded board, etc. are placed on the receiving material 4.

When a steel frame is not used for the purlin material, a hammer 6 may be provided between the middle of the receiving material 4 and the intersection of the upper chord material.

This device consists of the above-mentioned structure, in which the midpoints of adjacent upper chord members in a lattice formed by upper chord members are connected by parallel receiving members, and the midpoints of these receiving members and the intersection of the lower chord members are connected by diagonal members. Therefore, compared to the above-mentioned known example, the distance between the supporting points of the receiving material of this invention is halved, and the buckling length of the upper chord member on which compressive force acts is halved, so that each The cross-sectional area of the member can be reduced.

In other words, the bending stress can be reduced by supporting a receiving member such as a purlin which also serves as a buckling prevention member for the upper chord member in the middle than the lower chord member.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the outline of the basic form of this invention, Figure 2
3 and 3 are plan views showing different embodiments, and FIG. 4 is a sectional view. 1... Upper chord material, 2... Lower chord material, 3...
...Body material, 4...Receiving material, 5...Diagonal material, 6...Blowing.

Claims (1)

[Scope of utility model registration request] The upper and lower chord members form a reticulated lattice with the same shape on the upper and lower sides, and the upper and lower chord members are connected by a belly member, and the midpoints of adjacent upper chord members in one lattice formed by the upper chord members are parallel to each other. A three-dimensional truss characterized in that it is connected by receiving members, and the midpoint of the receiving members and the intersection of the lower chord members are connected by diagonal members.