JPH0630964Y2 - Space truss - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention relates to a three-dimensional truss used for a roof of a porch or a pier, a temporary roof of an exhibition site, a canopy of a building, a pergola, and the like.

2. Description of the Related Art As a conventional three-dimensional truss, as disclosed in Japanese Patent Publication No. 52-25168, a zigzag diagonal member is used. However, since a round pipe is used for this diagonal member together with the chord member, the connecting portions of the diagonal member and the chord member are flatly crushed and formed so that they can be connected with bolts and nuts. Is.

The width of the flat connecting portion is naturally larger than the diameter of the pipe, and it has to be shaped so as to protrude on both sides from the other portions of the pipe, which is bad in appearance and in terms of strength. Since it is also weak, a spacer having a predetermined thickness is interposed between the connecting portion of the diagonal member and the connecting portion of the chord member.

An object of the present invention is to provide a three-dimensional truss that has a good appearance of the connecting portion between the diagonal member and the chord member and is also advantageous in strength.

Means for Solving the Problems In order to achieve the above-mentioned object, the space truss according to the present invention has vertical and horizontal lower chord members and vertical and horizontal lower chord members which are crossed and interconnected to form a grid pattern. Between the vertical and horizontal upper chords and the lower chords and upper chords arranged inside are arranged such that those extending vertically and horizontally alternately in the same direction as above are arranged and connected to each other. The zigzag diagonal diagonal members that are connected in sequence to each other, and the diagonal cross section of the diagonal material is hollow square, and the connecting portion with the chord member is square. The chord member formed into a flat shape by pressing the remaining two opposing walls while folding in two, and the chord member that is connected to the diagonal member are the two slope surfaces that the flat connecting portion of the two diagonal members abuts, Includes horizontal surfaces with which crossed chords come into contact The cross section is formed in a hollow polygonal shape.

Action The three-dimensional truss of the present invention has vertical and horizontal lower chord members which are crossed and connected to each other so as to form a grid pattern, and which extend above and below the vertical and horizontal lower chord members alternately in the same direction in the vertical and horizontal directions. It consists of vertical and horizontal upper chords that are arranged so that they are on the inner side and are connected to each other, and a zigzag-shaped diagonal member, but the cross section of the zigzag-shaped diagonal member is a hollow square and the chord member. The connecting part is made into a flat shape by folding two opposite square walls inward and pressing the remaining two opposite walls in close proximity. Between the lower chord member and the upper chord member arranged inside, since the cross section is formed in a hollow polygonal shape including the two slanting faces of the flat connecting portions of the slanting member and the horizontal planes of the crossing chord members contacting each other. Zigzag diagonal members are inserted in order to It can be connected to the wall forming the slope with a set screw or the like. Further, the crossed chord members can be connected to the wall forming the horizontal surface of the chord members with a set screw or the like.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The three-dimensional truss shown in the figure is a vertical and horizontal lower chord member that is crossed and connected to each other so as to form a grid pattern.
(1) and (2) and vertically and horizontally lower chords (1) and (2) are arranged alternately and vertically and horizontally in the same direction. Zigzag slant (5) that is sequentially interposed between the upper and lower chords (3) (4) and the lower chord (1) and the upper chord (3) that are arranged inside and connected to them. And the cross section of the diagonal member (5) is hollow, and the connecting parts (6) and (7) with the chord members (1) and (3) are rectangular. Fold it in half and the remaining 2 opposite
It is made flat by pressing two walls (9).
The chords (1) and (3) connected to (5) intersect two chords (10) with which the flat connecting parts (6) and (7) of the two diagonals (5) come into contact, The material is formed into a hollow pentagonal cross section including a horizontal surface (11) with which the material abuts.

Lower vertical chords (1) and upper horizontal chords (4) are odd, horizontal lower chords (2) and upper vertical chords (3) are even, and vertical and horizontal lower chords (1) (2) are vertical and horizontal upper chords (3). ) (4), one more than each, and when viewed from the plane, each vertical upper chord (3) is exactly in the middle of the vertical lower chords (1) next to each other, and each horizontal upper chord (4) is It is arranged so that it is located exactly in the middle of the transverse lower chord members (2) adjacent to each other. Walls forming horizontal planes (11) of crossed chords (1) and (3) using C-shaped channel material of the same cross section for both horizontal lower chords (2) and horizontal upper chords (4). It is fastened with a set screw (13) through a square washer (12). In addition,
The lower vertical chords (1) and the upper vertical chords (3) also have the same cross section. The slope of the lower vertical chord (1) is parallel to the slope of the upper vertical chord (3).

The pair of opposing walls (8) that can be folded in two to form the flat connecting portions (6) and (7) of the diagonal member (5) have the center of the inner surface for easy bending inward. And notches on both sides of outer surface (14)
(15) is provided, and is formed thinner than that of the pair of opposing walls (9) whose thickness is also compressed. A ridge (16) extending in the length direction is provided in the center of the inner surface of the pair of opposing walls (9) to be pressed, and both walls (9) are pressed to form two ridges (16). When two layers are stacked
A gap is provided between both walls (9) to accommodate (17). Then, in the portion where the projected ridges (16) are overlapped, the connecting portions (6) (7) of the diagonal members (5) are square washers (18).
It is fixed to the chord members (1) and (3) by the set screw (19) via the.

FIG. 7 shows a state in which the space truss according to the present invention is attached to the top surface of the support column (21) through the attachment metal fitting (20).

In this example, all chords (1)-(4) and diagonals (5)
For this, an aluminum extruded profile is used.

Although not shown, a pair of opposing walls (7) of the diagonal member (5) that can be folded in two are formed with concave portions having notches (15) near both edges of the outer surface as both edges. You may stay. If there are recesses, a jig is fitted into the recesses on both sides of the part that should become the connecting parts (6) and (7) to form the connecting parts by pressing, and the predetermined cross section of the diagonal member (5). Helps maintain shape.

In the above-mentioned embodiment, the cross-sections of the vertical chord members (1) and (3) are pentagonal, but of course they may be triangular, and it is sufficient that at least the above-mentioned three surfaces are provided.

In the above embodiment, the lower chords (1) and (2) have a larger number than the upper chords (3) and (4), but when using a space truss for a pergola, turn this upside down. It is also possible to use the space truss vertically.
Further, the above odd / even relationship between the lower chords (1) (2) and the upper chords (3) (4) can be reversed, or both may be odd depending on the form of the space truss. Both may be even numbers.

Effect of the Invention According to the space truss of the present invention, two diagonally opposite walls having a hollow rectangular cross section and a square connecting portion with the chord member are folded inward and the remaining two opposing walls are connected. Since it is made flat by pressing on the wall, the width of the connecting part of the diagonal member is the same as the width of the other parts of the diagonal member and the appearance is good, and the connecting part with the string material is the chord itself. Coupled with the fact that they can be connected without flattening, there is an advantage that the required strength can be obtained without using other members.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an enlarged sectional view taken along the line II of FIG. 2, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG. 4 is a front view. 5 is an enlarged perspective view of a zigzag diagonal member, FIG. 6 is a sectional view taken along line VI-VI of FIG. 1, and FIG. 7 is a sectional view taken along line VII-VII of FIG. The state supported by the pillar is shown. (1) …… Vertical lower chord, (2) …… Horizontal lower chord, (3) …… Vertical upper chord, (4) …… Horizontal upper chord, (5) …… Diagonal, (6) (7) …… Slanting material connection, (8) (9) …… Wall, (10) …… Slope, (11) …… Horizontal plane.

Claims (1)

[Scope of utility model registration request] 1. Vertical and horizontal lower chord members (1) and (2) which are crossed and connected to each other so as to form a grid pattern,
The vertical and horizontal upper chords (3) (3), which are arranged above and below the vertical and horizontal lower chords (1) (2), are arranged alternately and vertically in the same direction, and are connected to each other. Four)
And a zigzag diagonal member that is sequentially interposed between the lower chord member (1) and the upper chord member (3) arranged inside and connected to them.
(5), and the cross section of the diagonal member (5) is hollow square and chord
(1) Two walls (8) that are connected to (3) and have a square shape with connecting portions (6) and (7)
Fold inward and the remaining two opposite walls
The chord members (1) and (3), which are made flat by pressing the (9) and are connected to the diagonal member (5), are flat-shaped connecting portions (6) (2) of the two diagonal members (5). A three-dimensional truss formed in a hollow polygonal shape in cross section including two slopes (10) in contact with each other at 7) and a horizontal surface (11) in contact with each cross chord.