JPH09287200A - Truss - Google Patents

Abstract

PROBLEM TO BE SOLVED: To nearly completely eliminate errors in assembling by a method wherein the thickness of a connection where vertical or horizontal chord member and inclined plate are superposed one on another can be made equal at any position. SOLUTION: In the truss, chord members and inclined plates have flat portions 3, 4, 5, 9, 10, 11 formed by inwardly folding and crushing side walls, and a flat portion of chord member and a flat portion of inclined plate are superposed one on another at an intersection of upper and lower chord members. And in the upper and lower chord members, a large number of horizontal pipes (a), in each of which a flat portion is formed at the center and both ends thereof, are connected in series. In the inclined plates, V-shaped pipe materials (b), in which a flat portion is formed at the center and both ends thereof, are connected in wavelike form, and at an intersection of upper and lower chord members, two horizontal pipes (a) normal to a horizontal pipe (a) and three V-shaped pipes (b) obliquely intersecting are collected together in such a manner that end flat portions of two horizontal pipes (a) are superposed on the central flat portion of one horizontal pipe (a), and end flat portions of two V-shaped pipes (b) are superposed on the central flat portion of one V-shaped pipe (b).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a truss used for a frame of a building or a space structure in a gymnasium, a dome stadium, an exhibition hall, a leisure hall, a hangar, a greenhouse or the like.

[0002]

2. Description of the Related Art As a truss of this type, for example, Japanese Patent Publication Sho 5
The one disclosed in Japanese Patent No. 2-25168 is known. When connecting a horizontal chord member and a swash plate, this truss crushes an arbitrary position of the pipe material to form a flat portion with a double structure, and the flat portion is overlapped and fastened. In this case, there is a problem that the flat portion is wider than the pipe material, and the flat portion is thin and the strength is weak. Therefore,
For example, a strong truss as disclosed in Japanese Examined Patent Publication No. 6-78649 was developed. This truss consists of long vertical and horizontal upper chords arranged in a grid, long vertical and horizontal lower chords also arranged in a grid, and long side corrugated diagonal timbers that connect the intersections of the upper and lower chords. Each chord and swash plate are made of square pipe material, and are provided with a quadruple-shaped flat portion obtained by bending both side walls of the square pipe material inward, and the intersection of the upper chord and the lower chord. In the above, the flat portion of each chord member and the flat portion of the swash plate are overlapped and fastened.

[0003]

[Problems to be Solved by the Invention] Japanese Patent Publication No. 6-786
In the truss described in Japanese Patent Publication No. 49, the flat portion has a thickness four times as thick as that of the pipe material to enhance the strength, and the lateral width is almost equal to the diameter of the pipe material, which makes it easy to stack the flat portions. However, there are the following problems.

That is, usually, a plurality of long materials such as 5.5 meters, 8 meters, and 11 meters are prepared for the chord material and the diagonal material, and those having a necessary length according to the size of the structure are used. ing. However, when the roof or the like of the structure is a large-sized structure longer than the length of the single chord, for example, a plurality of the chords and the swash plates are arranged in the horizontal direction, and It is necessary to unite flat members. In this case, in the middle flat portion of a certain chord member, the flat portion of this chord member itself, the flat portion of another chord member orthogonal to this, and the flat portion of the swash plate intersecting in two diagonal directions. , And will overlap, but at the location where the chord members and diagonal members are connected horizontally as described above, for example, at the point where the chord members are connected, one end of the chord member is flattened. The flat end portions of the other chord members connected to the above are overlapped excessively, and the overlapping thickness of this portion is larger than the overlapping thickness of the intermediate flat portion. Therefore, the thickness of the chord member and the swash plate at the flat portion of one continuous portion is different from the thickness of the connecting portion, and as a result, the truss itself is distorted. Therefore, in order to avoid this, prepare a large number of chords and swash plates according to the size of the truss, change the angle of the chords and diagonals, and change the thickness of the spacer of the overlapping section to increase the overall thickness. It is inferior in economic efficiency and workability because it requires other design and processing such as adjusting. Furthermore,
As mentioned above, preparing a large number of chords and diagonal members and connecting them as needed may cause accidental connection of different sized pieces, and in some cases it may be necessary to reassemble the truss. .

Therefore, an object of the present invention is to make the overlapping thicknesses at the connecting positions of vertical and horizontal chords and diagonal members equal at any position, to prevent the occurrence of distortion of the truss, and to standardize the chord members and diagonal members. The purpose is to provide a truss that can be used and is economical and easy to work with, and has excellent workability.

[0006]

In order to achieve the above-mentioned object, the structure of the present invention has a lattice-shaped upper frame body in which a large number of pipe-shaped chord members are vertically and horizontally assembled, and also a large number of pipe-shaped chord members. A grid-shaped lower frame body assembled vertically and horizontally, and two pipe-shaped diagonal members that are diagonally arranged between the upper frame body and the lower frame body to connect the intersections of the upper and lower chord members. And each of the chord members and each diagonal member is provided with a flat portion in which side walls are bent and crushed inward, and at the intersection of each of the upper and lower chord members, the flat portion of each chord member and the flat portion of the diagonal member are provided. In the truss that is fastened by superposition,
Each of the upper and lower chord members is formed by connecting a number of single horizontal pipe members with flat portions formed at the center and both ends, and each diagonal member has a flat portion formed at the center and both ends. A large number of one V-shaped pipe members are continuously formed in a corrugated form, and at the intersection of the upper and lower chord members, two horizontal pipe members orthogonal to one horizontal pipe member are diagonally crossed. Two V-shaped pipe materials are assembled, and the end flat portions of the other two horizontal pipe materials and the central flat portion of one V-shaped pipe material are combined with the central flat portion of one horizontal pipe material. It is characterized in that the two flat end portions of the V-shaped pipe material are overlapped and fastened.

In this case, the intersections of the chord members in the upper frame and the intersections of the chord members in the lower frame are obliquely displaced by half the length of the V-shaped pipe material.

Further, it is preferable that anti-slip is formed on the upper surface, lower surface or both upper and lower surfaces of each flat portion.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. A truss A according to the present invention is mounted on a column 1 standing on the ground, and a roof is placed on the truss A. B and the like are combined.

The truss A is composed of an upper frame member X composed of vertical and horizontal upper chord members C1 and C2 arranged in a grid pattern, and a lower frame member Y composed of vertical and horizontal lower chord members D1 and D2 arranged in a grid pattern.
And two crossed diagonal members E1 and E2 that connect the intersection P1 of the upper chord members C1 and C2 and the intersection P2 of the lower chord members D1 and D2.
It consists of and.

The upper chord members C1 and C2 and the lower chord members D1 and D2 are formed in the same structure, and are composed of a plurality of single horizontal pipe members a connected in the horizontal direction.

The diagonal members E1 and E2 are also formed in the same structure,
Each is composed of a single V-shaped pipe material b connected in a plurality of corrugations.

As shown in FIGS. 7 and 11, the single horizontal pipe member a is composed of a horizontal rectangular pipe main body 2, a flat portion 3 provided at the center of the main body 2, and flat portions provided at both ends of the main body 2. Part 4, 5
It is composed of The flat portions 3, 4, 5 are formed by bending both end walls g of the main body 2 inward and crushing them, whereby the thickness L of each flat portion 3, 4, 5 becomes four times the wall thickness of the main body 2. , The width W is the same as the diameter of the main body 2.
A bolt insertion hole 6 is formed in the center of each flat portion 3, 4, 5 and a slip stopper 7 including grooves, ribs and the like is provided on the upper surface, the lower surface or both upper and lower surfaces.

A single V-shaped pipe material b constituting the diagonal member E
As shown in FIG. 9, is composed of a square pipe body 8 bent in a V shape, a flat portion 9 provided at the center of the main body 8, and flat portions 10 and 11 provided at both ends of the main body 8. There is. The flat portions 9, 10, 11 are similar to those shown in FIG.
It is formed by bending both side walls of the main body 8 inward and crushing it. Its thickness is four times the wall thickness of the main body 8 and its width is the same as the diameter of the main body 8. Stops are formed.

The upper chord members C1 and C2 are arranged vertically and horizontally in a grid pattern, and the upper chord member C2 in the longitudinal direction and the upper chord member C1 in the lateral direction each have a single horizontal pipe-shaped a, and end portions in the longitudinal and lateral directions. It is a series of multiple comrades that are combined. Similarly, lower chord material D
1 and D2 are arranged vertically and horizontally, and a plurality of single horizontal pipe materials a are continuously provided in the vertical and horizontal directions, respectively.

The diagonal members E1 and E2 are formed in a corrugated shape by combining a plurality of end portions of a single V-shaped pipe material b.

The intersection point P1 where the upper chord members C1 and C2 are orthogonal to each other and the intersection point P2 where the lower chord members D1 and D2 are orthogonal to each other are diagonally displaced by half the length of the V-shaped pipe material b constituting the diagonal member E. It is arranged.

The two diagonal members E1 and E2 are arranged upside down, whereby the central flat portion 9 of the V-shaped pipe material b constituting one diagonal member E1 is always connected to the upper intersection P1.
The central flat portion 9 of the other V-shaped pipe material b constituting the other diagonal member E2 is always connected to the lower intersection P2. Therefore, the central flat portion 9 of the V-shaped pipe material b in the diagonal member E1
Is connected to the intersection point P1, the flat portions 10 at both ends are
11 is connected to the lower intersection P2, and V in the diagonal member E2
When the central flat portion 9 of the pipe member b is connected to the lower intersection point P2, the flat portions 10 and 11 at both ends are connected to the upper intersection point P1.

The assembling structure of the truss will be described below with reference to FIGS. 3 to 6. For example, at the upper intersection P1, for example, in the lateral direction with respect to the central portion of one horizontal member a constituting the upper chord member C2. The two horizontal members a that constitute the upper chord member C1,
The end portion of a, the central portion of the V-shaped pipe material b that constitutes one diagonal member E2, and the end portions of the two V-shaped pipe materials b that constitute the other diagonal member E2 are gathered together and tightened. They are attached to each other, and this combined state is alternately repeated at each intersection P1. At the lower intersection P2, the above intersection P1 is simply turned upside down.
Is the same as the combined state in.

Now, as shown in FIG. 5, an intersection P1 at a certain place will be described. In the horizontal direction with respect to the central flat portion 3 of the square pipe body 2 which is the horizontal member a which constitutes the upper chord member C2 in the vertical direction. The end flat portions 4 and 5 of the square pipe 2 that is the two horizontal members a constituting the upper chord member C1 are overlapped downward, and further, the V-shaped pipe member b that is the V-shaped pipe member b that constitutes one diagonal member E2 The end flat portions 10 and 11 are overlapped downward, and further, the central flat portion 9 of the pipe body 8 which is the V-shaped pipe material b forming the other diagonal member E1 is overlapped downward, and the spacer S
The flat portions 3, 4, 5, 9, 10, 11 are superposed and fastened via 1, S2, S3, S4 and the bolt V. At this time, a slip stopper 7 composed of a groove, a rib or the like is formed on each spacer and the flat portion so that the joint portion does not slip. The spacer S2 is arranged so as to be offset by 45 degrees with respect to the spacers S1 and S3.

At the lower intersection P2, the connection state is the same, except that the state shown in FIG. 5 is arranged upside down.

Incidentally, the outer peripheral side end of the truss A is, if necessary, a pipe body 12 shown in FIG. 8 and flat portions 13, 1 at both ends.
It is possible to assemble the auxiliary horizontal member provided with No. 4 and the auxiliary member having the slanted pipe main body 15 and the flat portions 16 and 17 at both ends shown in FIG. These are used according to the size of the truss.

[0023]

According to the present invention, the following effects can be obtained.

According to the invention of each claim, at the intersection of each chord member and each diagonal member, there is always one central flat portion of the horizontal pipe member and one end flat portion of the other two horizontal pipe members. Since the central flat portion of one V-shaped pipe material and the end flat portion of the other two V-shaped pipe materials are superposed, the superposed wall thickness and weight of each upper and lower intersection point are the same, No distortion occurs in the entire truss.

Similarly, the truss can be assembled simply by preparing a standardized horizontal member having the same structure and a V-shaped pipe member having the same structure, and since no extra material is required, it is excellent in workability and economical efficiency. Since each member is light and compact, it is advantageous for storage and transportation.

Since only horizontal members having the same structure and diagonal members having the same structure are prepared, and the method of assembling these members is constant, there is little risk of assembly errors, and work such as reassembling the truss can be avoided. .

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of a truss.

FIG. 2 is a front view of the truss.

FIG. 3 is a partially enlarged schematic perspective view of a truss.

FIG. 4 is an exploded perspective view of FIG.

FIG. 5 is an exploded perspective view showing a superposed state at an intersection of an upper chord member and a diagonal member.

FIG. 6 is a partially cutaway vertical front view showing an overlapping state at an intersection of an upper chord member and a diagonal member.

FIG. 7 is a schematic front view of a horizontal pipe member.

FIG. 8 is a schematic front view of an auxiliary horizontal member.

FIG. 9 is a schematic front view of a V-shaped pipe material.

FIG. 10 is a schematic front view of an auxiliary diagonal member.

FIG. 11 is a partially cutaway perspective view of a horizontal pipe member.

FIG. 12 is a sectional view taken along line AA of FIG. 11;

13 is a cross-sectional view taken along the line BB of FIG.

FIG. 14 is a sectional view taken along line CC of FIG.

[Explanation of symbols]

 3, 4, 5, 9, 10, 11 Flat part 7 Anti-slip a Horizontal pipe material b V-shaped pipe material C1, C2, D1, D2 Chord material E1, E2 Diagonal material P1, P2 Intersection X Upper frame Y Lower Side frame

Claims (3)

[Claims] 1. A lattice-shaped upper frame body in which a large number of pipe-shaped chord members are vertically and horizontally assembled, a lattice-shaped lower frame body in which a large number of pipe-shaped chord members are vertically and horizontally assembled, and an upper frame body. And two pipe-shaped diagonal members arranged diagonally between the lower frame and the upper and lower chord members to connect intersections of the upper and lower chord members. Equipped with a flat part that is bent and crushed,
In the truss which is fastened by superposing the flat portion of each chord member and the flat portion of the diagonal member at the intersection of the upper and lower chord members, each upper and lower chord member has a flat portion at the central portion and both end portions. A large number of formed single horizontal pipe members are formed in series, and each diagonal member is formed in a corrugated shape by connecting a plurality of single V-shaped pipe members having flat portions at the center and both ends. At the intersection of each of the upper and lower chord members, two horizontal pipe members orthogonal to one horizontal pipe member and three V-shaped pipe members intersecting diagonally are assembled to form one horizontal pipe member. The end flats of the other two horizontal pipes, the central flat of one V-shaped pipe and the end flats of the other two V-shaped pipes overlap with the central flat of the pipe. A truss characterized by being fastened. 2. The truss according to claim 1, wherein the intersections of the chord members in the upper frame and the intersections of the chord members in the lower frame are obliquely displaced from each other by half the length of the V-shaped pipe member. 3. The truss according to claim 1, wherein slippers are formed on the upper surface, the lower surface, or both upper and lower surfaces of each flat portion.