JPH03228935A - Three-dimensional truss - Google Patents

Abstract

PURPOSE:To simplify assembling workability by forming a quadrangular pyramid main unit, a trigonal pyramid side unit and triangular corner unit with rod materials, connecting the corners of the units to one another and jointing apexes of the units to one another with a chord material. CONSTITUTION:A quadrangular pyramid main unit 1, a trigonal pyramid side unit 2 and a triangular corner unit 3 respectively having a connection part at each corner are formed with rod materials. Then, the units 1, 2 and 3 are abutted and connected to one another in a rectangular form when viewed from top. Furthermore, the apexes of the units 1, 2 and 3 are connected to one another with longitudinal and transverse chord materials 4 and 5. According to the aforesaid construction, it is possible to obtain a three-dimensional truss allowing easy transportation, handling and assembly work.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a three-dimensional truss used in various buildings.

[Prior Art] Conventionally, as this type of three-dimensional truss, an upper lattice body and a lower lattice body, which are formed by connecting a plurality of chord members in a lattice shape, are arranged at predetermined intervals with the chord members in both lattice bodies aligned in the same direction. It is known that the intersection points of the chord members in the upper and lower lattice bodies are connected by diagonal members oriented at 45 degrees to the above chord members.

However, such conventional trusses have the disadvantage that a large number of chord members and diagonal members must be combined and connected in various directions, making the assembly work complicated and time-consuming. Because of the complicated interposition between the lattice body and the lower lattice body, the space between the two lattice bodies is narrowed, and there is also the problem that the space cannot be used effectively.

Therefore, in order to solve this problem, the inventor of the present invention, in Japanese Patent Application No. 1983-83386 (see Japanese Unexamined Patent Publication No. 1-256FI34), created a diagonal material in a zigzag manner along one side of the string material. It is composed of first and second lattices attached in a bent shape, and vertical and horizontal chord members connected in a lattice shape, and a plurality of the first and second lattices intersect in a direction orthogonal to each other. We proposed a truss in which vertical and horizontal chord members are connected to the connected first and second lattices at different angles of 45 degrees.

According to this improved type of truss, the first and second lattices can be manufactured in advance at a factory, etc., and then transported to the site and assembled, which makes manufacturing and transportation easier than with conventional trusses. It is very easy to assemble, and has the advantage that the space within the truss can be used effectively by reducing the need for string materials.

However, since the first and second lattices are long members with diagonal members attached in a zigzag pattern, there are problems in transportation and handling. Work becomes tedious.

[Problems to be Solved by the Invention] An object of the present invention is to construct a truss having the same structure as the above-mentioned improved truss so that transportation, handling, on-site assembly operations, etc. are simple.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the three-dimensional truss of the present invention includes a main unit formed in the shape of a quadrangular pyramid by rods, each corner of which is used as a connecting part, and a main unit formed by rods into a quadrangular pyramid shape. The unit is formed into a triangular pyramid shape divided into two along a pair of opposing ridgelines,
A side unit with a connecting part at each corner, and a corner unit formed into a triangular shape with a bar and with each corner as a connecting part are connected to each other in a rectangular shape in a plan view by butting the connecting parts against each other. The feature is that the top parts are connected by vertical and horizontal chord members.

[Operation] The truss is assembled into units, and the square pyramid-shaped main unit, the triangular pyramid-shaped side units, and the triangular corner units are sequentially connected, and the tops of each unit are connected with vertical and horizontal chord members. Because of this, the assembly process is very simple and can be assembled in a short time. Furthermore, transportation and handling of each member are easy.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 shows an example of a three-dimensional truss according to the present invention.
The truss is unitized and includes a main unit 1, side units 2, corner units 3, and vertical and horizontal chord members 4 and 5.

As shown in FIG. 2(A), the main unit 1 is formed into a quadrangular pyramid shape by a rod 10a that constitutes the chord member on the lower side of the truss and a rod 10b that constitutes the diagonal member,
Connecting part 11 with connecting holes 12 for bolt insertion at each corner
On the other hand, as shown in FIG.
and the bar 20b constituting the diagonal member, the main unit 1 is formed into an irregular triangular pyramid shape in which the main unit 1 is divided into two along the pair of opposing bars 10b, and each corner has a hole for inserting a bolt. It has a connecting part 21 with a connecting hole 22,
Further, as shown in IJ(G:), the corner unit 3 is formed in a triangular shape by a bar 30a forming a chord member on the lower surface of the truss and a bar 30b forming a diagonal member.

Connecting portion 31 with connecting holes 32 for bolt insertion at each corner
Furthermore, as shown in FIG. 4(D), the chord members 4 and 5 are made of the same material as each of the above-mentioned bars, and have connecting holes 42 and 52 for bolt insertion. 41.51 at the required interval.

The above bars 10a, 10b, 20a, 20b, 30a, 3
0b and the chord members 4.5 may be formed from metal pipes or the like, and each unit 1, 2.
3, in the illustrated embodiment, independent short bars are integrated into a predetermined shape by welding or bolting, or long bars are bent into a predetermined shape. Also good.

The units 1, 2.3 and the string members 4, 5 are combined as follows to form a truss. That is, the first
As shown in the figure, when the plurality of main units 1 are viewed from above, the connecting portions 11 are arranged so that the rods 10a constituting the chord members and the rods 10b constituting the diagonal members are connected in a lattice shape. After aligning these main units 1 and connecting them to each other with bolts and nuts 7 inserted into the connecting holes 12, the sight unit 2 is placed around these main units 1, and the rods 20a and The bar 20b constituting the diagonal member or the bar 10 of the main unit 1
a and I (lb) respectively, and connect them with bolts and nuts 7. Adjacent side units 2 are similarly connected with bolts and nuts 7, and furthermore, the corner corners of the truss are A corner unit 3 is arranged at each of the parts where the corner units 3 are located, and the corner units 3 are connected to the side units 2 located on both sides thereof using bolts and nuts 7,
This connects the units 1, 2.3 in a rectangular shape in plan view, and connects the tops of these units 1, 2.3 to the bar 1.
They are connected by vertical and horizontal chord members 4 and 5 along 0b, 20b, and 30b.

The resulting truss, when viewed from above, has vertical and horizontal chord members 4 and 5 located in a grid pattern on the top side.
Bars of each unit 1, 2.3 on the bottom side] Oa, 2
The chord members constructed by connecting 0a and 30a in a lattice pattern cross each other at 45 degree angles, and this configuration is an improved type disclosed in JP-A No. 1-256534. It is essentially the same as a truss. That is,
By connecting each unit 1, 2.3 and the chord member 4.5, a truss having the same structure as the conventional truss can be easily obtained.

In addition, when connecting each of the units 1, 2.3 and the string members 4, 5, a spacer of an appropriate thickness is interposed between the connecting parts to reduce the tensile force and compressive force acting on each bar member and chord member. It is also possible to concentrate the force on one point in the center of the connecting portion, thereby preventing the moment caused by the above-mentioned acting force from being generated in the connecting portion.

[Effect of the invention] As described above, according to the present invention, the truss is unitized,
The square pyramid-shaped main unit, the triangular pyramid-shaped site unit, and the triangular corner unit are connected in sequence, and the tops of each unit are connected using vertical and horizontal chords. Compared to conventional trusses, which are assembled by sequentially connecting string members, the assembly process is extremely simple and can be assembled in a short time. Moreover,
Since each unit is compact and the elongated members are simple rod-shaped string members, they are easy to transport and handle.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a three-dimensional truss according to the present invention, and FIGS. 2(A) to (D) are perspective views showing its constituent members. 1... Main unit, 2... Sight unit, 3... Corner unit, 4.5... String material, 10a, 10b, 20a, 20b, 30a, 30b -
- Bar material, 11.21.31...Connection part. (1 other person)

Claims (1)

[Claims] 1. A main unit formed in the shape of a quadrangular pyramid using a bar material, with each corner as a connecting part, and a triangular pyramid shape in which the main unit is divided into two along a pair of opposing ridgelines using a bar material. , a side unit with each corner as a connecting part, and a corner unit formed in a triangular shape by a bar and with each corner as a connecting part are connected to each other in a rectangular shape in plan view by butting the connecting parts against each other. A three-dimensional truss characterized by connecting the tops of the units with vertical and horizontal chords.