JP2878466B2 - Truss structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a truss structure used for a building or a civil engineering structure, and is suitable for a case where a catwalk or the like is passed through a truss on a dome roof, for example.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional example. FIG. 4 shows a horizontal section at an upper chord material position, and FIG. 5 shows a horizontal section at a lower chord material position.

In this example, in addition to the upper chord 1, the lower chord 2 and the diagonal 3 and the bundle (vertical) 4 connecting the upper chord 1 and the lower chord 2, which are the main members of the truss, A graded truss structure having a graded point 8 and having a sub-slanting material 6 connecting the upper chord material 1 and the graded point 8 and a sub-bundle material 7 vertically connecting the upper chorded material 1 and the graded point 8 is formed.

[0004] Such a classified truss is mainly used when the truss height is large.

[0005]

By the way, when a frame such as a roof has a truss structure, a catwalk is generally provided for use in inspection and repair of equipment and the like. It is desirable that it can be installed.

[0006] However, when the catwalk is passed through the truss, the oblique material or bundle of the truss often hinders.

Conventionally, this problem has been dealt with by moving the catwalk to a position where the catwalk does not hit the diagonal material or the bundle, removing the intermediate bundle, or changing the diagonal or the bundle. . For this reason, there have been problems in design and manufacturing, such as a change in the manner of assembling the diagonal members and the bundle members of the truss members through which the catwalk passes.

The present invention provides a truss structure capable of solving the above-described problems and reducing buckling as compared with the conventional structure by devising a method of assembling the truss members in the classified truss structure. It is intended for that purpose.

[0009]

The outline of the present invention will be described below with reference to the attached drawings.

The truss structure of the present invention comprises an upper chord 1 and a lower chord 2
A graded truss structure having a score 8 provided in the middle of the diagonal member 3 connecting the upper chord material 1 and the graded point 8 is conventionally provided. The vertically connected bundle 10 (corresponding to the sub-bundle 7 in FIG. 3) is extended to the lower chord 2 to connect between the upper chord 1 and the lower chord 2, and conventionally, the diagonal members 3 on both sides are Nodes 5 and lower chord 2 of the upper chord 1 that gather
The bundle member 4 that vertically connects the spaces is omitted.

The bundle 4 passing through the case 8 is composed of the upper chord 1 and the lower chord 2
Are connected, the intermediate bundle material 4 can be omitted, and a coherent space is formed in that portion. In addition, in the conventional structure, the buckling stoppers 9 come between the lower end of the bundle 4 and the lower ends of the diagonal members 3 on both sides (see FIG. 3). Since the bundle material 10 passing through the point 8 is provided, the bundle material 10 has a buckling prevention function, and the buckling prevention 9 is provided at one center, so that the buckling length of the lower chord material 2 is the same as the conventional one. It will be.

[0012]

Next, the illustrated embodiment will be described.

FIG. 1 shows an embodiment of the truss structure of the present invention in one plane. For the portion where the adjacent diagonal members 3 connecting the upper chord member 1 and the lower chord member 2 are in a C-shape, the central part of the diagonal members 3 on both sides and the upper chord member 1 are connected by the sub-diagonal member 6 to form a grade 8. doing.

As shown in the figure, a vertical bundle 10 is provided on the back side of the truss at the point 8 of the case, and this bundle 1
By extending 0 to the lower chord 2 and omitting the central bundle, a closed space forming a house with a triangular roof is formed. A catwalk or equipment piping provided in the truss may be provided so as to pass through this space.

In the drawing, reference numeral 9 denotes buckling stoppers arranged in a direction intersecting the plane, which are omitted from broken lines.
And the lower chord 2 pass in the same vertical plane. That is, in this embodiment, since the bundle member 10 is joined to the lower chord member 2 at a distance of 1/4 from the nodes 3 on both sides where the diagonal member 3 is attached, the bundle member 10 plays a role of buckling prevention, and Bundle 1
By passing the buckling stopper 9 in the middle of 0, the buckling length becomes uniform.

FIG. 2 is a plan view of the truss structure of the above embodiment. When a catwalk or the like is passed through the truss, upper and lower buckling stoppers 9 (other trusses) indicated by broken lines in FIG. An angle or the like can be used as in the case of the constituent members).

In the illustrated embodiment, the truss constituent members are shown as angles, but the present invention is not limited to this, and any member normally used in a truss structure can be applied.

[0018]

[Effects of the Invention] Since the central bundle between the slant members can be omitted, a large space can be secured in the middle part, and a catwalk or the like can be easily passed.

[0019] By connecting the upper chord material and the lower chord material with the bundle passing the grade, the number of buckling stops of the lower chord material can be reduced.

As the buckling is reduced, the weight of the entire truss structure can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a plan view corresponding to the embodiment of FIG.

FIG. 3 is an elevation view showing an example of a conventional classification truss.

FIG. 4 is a horizontal sectional view of an upper chord material position corresponding to the conventional example of FIG. 3;

FIG. 5 is a horizontal sectional view of a lower chord material position corresponding to the conventional example of FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Upper chord material, 2 ... Lower chord material, 3 ... Diagonal material, 4 ... Bundle material, 5 ... Node, 6 ... Secondary diagonal material, 7 ... Secondary bundle material, 8 ... Grade point, 9 ... Buckling prevention, 10 ... Bundle Lumber

Claims (1)

(57) [Claims] 1. A truss structure in which a grade is provided in the middle of a diagonal member connecting an upper chord material and a lower chord material, and a sub-diagonal material is provided to connect the upper chord material and the grade point. Extending the bundle material connecting between the material and the grade to the lower chord material,
A truss structure wherein the upper chord material and the lower chord material are connected.