JP2653551B2 - Space truss structure and construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a plurality of rods as upper and lower chords, a plurality of rods as belly members in X and Y directions, and X and Y The present invention relates to a three-dimensional truss structure which is installed obliquely with respect to a direction, and which is constructed by three-dimensionally joining these rods via a ball joint, and a construction method thereof.

[Conventional technology]

It is constructed by connecting three or more upper chords, lower chords, and abdominal rods composed of steel pipes, etc. three-dimensionally via ball joints in the X, Y direction and diagonally to the X, Y directions. Space truss structure (space frame)
Although various types have been developed so far, the main one is a so-called melo truss, and the present applicant has also developed a unique three-dimensional truss structure called a unit truss.

By the way, when installing a roof on this type of space truss structure, a purlin receiving member is attached to each ball joint that joins the upper chord members, a purlin material is bridged between the purlin receiving members, and a roofing material is placed on it. Need to be installed.

[Problems to be solved by the invention]

However, in such a structure, it is necessary to attach a purlin receiving member on each of the ball joints connecting the upper chord members, and since a fixing fitting for fixing the purlin receiving member on the ball joint is also required, There are also problems such as the number of parts and members being greatly increased, and member management becoming complicated, and the number of joints being significantly increased, which inevitably prolongs the construction period and increasing construction costs.

The present invention has been made in order to solve the above-described problems, and has been developed to provide a three-dimensional truss structure and a construction method thereof capable of reducing the number of parts and members, shortening a construction period, and significantly reducing construction costs. The purpose is to provide.

[Means for solving the problem]

The space truss structure according to the present invention has a plurality of rods as upper chord and lower chord, in the X and Y directions, a plurality of rods as abdomen, and a diagonal direction with respect to the X and Y directions. For a three-dimensional truss structure that is installed and constructed by three-dimensionally joining these rods via a ball joint, the rods as the upper chord and the lower chord are formed from a shape steel. By interposing a receiving seat between the rod made of shaped steel and the ball joint, and welding or bolting the rod made of shaped steel, the receiving seat, and the receiving seat to the ball joint, respectively. It is built by joining.

The construction method of a space truss structure according to the present invention includes a plurality of rods as upper chord and lower chord, in the X and Y directions, a plurality of rods as abdomen, and a diagonal to the X and Y directions. The present invention relates to a method of constructing a three-dimensional truss structure, which is constructed by installing the respective rod members in three directions and three-dimensionally joining the rod members via a ball joint, and forming the rod members as the upper chord member and the lower chord member. While being formed from steel, a plurality of the upper chord material or the lower chord material, in the X and Y directions, a plurality of rods as the abdominal material, each installed in an oblique direction to the X and Y directions,
A receiving seat is interposed between the rod made of the shaped steel and the ball joint, and the rod made of the shaped steel, the receiving seat, and the receiving seat and the ball joint are welded or bolted, respectively. By joining together, and a purlin material and a ceiling receiving material are respectively attached to the upper chord material and the lower chord material to assemble a unit body forming a part of the space truss structure, and this unit body is lifted to an installation position and joined to each other. It is characterized by constructing the entire space truss structure.

〔Example〕

Hereinafter, a space truss structure according to the present invention and a construction method thereof will be described based on an embodiment shown in the drawings.

The space truss structure 1 includes a plurality of rods as the upper chord 3 and the lower chord 5 in the X and Y directions, and a plurality of rods as the abdominal 6 and the diagonal direction with respect to the X and Y directions. By connecting these rods three-dimensionally via the ball joint 2 so that the smallest unit becomes a quadrangular pyramid,
It is constructed as a flat plate.

Note that the X direction and the Y direction mean the left and right direction and the up and down direction in FIG. 1, respectively, and the oblique direction means the right ascending direction and the left ascending direction.

Of the rods, the upper chord 3 in the X direction or the Y direction (X direction in the embodiment) is formed from an H-beam, an I-beam, or the like,
The upper chord member 4, the lower chord member 5, and the abdominal member 6 in a direction perpendicular to the upper chord member 3 are formed of a steel pipe or the like.

The upper chord material 3 is continuously stretched between the ball joints 2 and 2 in parallel, and is joined to the ball joints 2 with the receiving seats 7 interposed therebetween.

At this time, the ball joint 2 and the receiving seat 7 are welded (see FIG. 4), or are protruded from the receiving seat 7 and joined by being bolted with a joining bolt 2a penetrating the ball joint 2 (fifth, fifth). 6), and the seat 7 and the upper chord 3 are joined together by bolting (see FIGS. 4 and 5) or by welding with a joining bolt 7a penetrating the seat 7 and the upper chord 3 (see FIG. 4). (See FIG. 6).

Further, a ball joint 2 and an upper chord material 4 made of a steel pipe,
The lower chord member 5 and the abdominal member 6 are bolt-shaped screwed into screw holes (not shown) formed in the ball joint 2 so as to protrude from ends of the upper chord member 4, the lower chord member 5 and the abdominal member 6, respectively. It is joined by screwing a male screw portion (not shown) of the connector (for example, see FIG. 3).

On the upper chord 3, a plurality of purlins 8 each made of a channel steel are laid at predetermined intervals at right angles to the upper chord 3, and each purlin 8 is fixed on the upper chord 3 by bolting or the like. A roofing material 9 made of a metal plate or the like is mounted on the purlin material 8.

At the time of construction, on the ground, a plurality of rods as the upper chord 3 and the lower chord 5 in the X and Y directions, a plurality of rods as the belly 6 and an oblique direction to the X and Y directions, respectively A part of a three-dimensional truss structure which is installed and three-dimensionally joined to each other via a ball joint 2 so that a minimum unit becomes a quadrangular pyramid, and a purlin member 8 is attached to the upper chord member 3. Is assembled, and a plurality of the unit bodies are lifted to the installation position by a lifting machine and joined to each other to construct the entire space truss structure.

If necessary, a work platform can be installed at the same time as the unit body is installed by installing a suspended work platform (not shown) below each unit body.

7 to 11 show another embodiment of the present invention.
The lower chord 10 in the direction is formed from a shaped steel such as an H-beam or an I-beam, and the lower chord 11, the upper chord 12 and the abdominal 13 in a direction perpendicular to the lower chord 10 are formed from a steel pipe.

Also, the lower chord material 10 has a ceiling support material 14 at right angles to this.
(Field material) is attached by bolting, and a ceiling material 15 is attached to the ceiling receiving material 14. Other configurations are substantially the same as those of the previous embodiment.

At the time of construction, on the ground, a plurality of rods as the upper chord 12 and the lower chord 10 in the X and Y directions, a plurality of rods as the abdominal 13 and obliquely to the X and Y directions, respectively. A three-dimensional truss structure is installed, and these rods are three-dimensionally joined to each other via a ball joint 2 so that the smallest unit becomes a quadrangular pyramid, and a ceiling receiving member 14 is attached below the lower chord 10. Assemble a flat unit that forms part of an object,
A plurality of the unit bodies are lifted to the installation position by a lifting machine and joined to each other to construct the entire space truss structure.

If necessary, a work platform can be installed at the same time as the installation of the unit bodies by installing a suspended work platform under each unit body.

〔The invention's effect〕

The space truss structure and the construction method according to the present invention have the following effects because they have the above-described configuration.

Of the rods, the upper chord or lower chord is formed from shaped steel, so that the purlin or ceiling support can be directly attached to the upper chord or lower chord. Can be combined with each other, eliminating the need for upper chords in one of the X and Y directions that should be attached, and also eliminating the need for receiving materials such as purlin receiving materials and fixing brackets for fixing them. Therefore, there are effects such as saving of the number of parts and members, and omission of construction.

In addition, on the ground, on the ground, a plurality of rods as upper chord and lower chord are installed in the X and Y directions, a plurality of rods as abdomen are installed diagonally with respect to the X and Y directions. And a three-dimensional truss structure in which these rods are three-dimensionally joined to each other via a ball joint such that the smallest unit becomes a quadrangular pyramid, and a purlin material or a ceiling support material is attached to the upper chord material or the lower chord material. Is assembled, and the unit bodies are lifted to the installation position by a plurality of lifting machines and joined together to construct the entire space truss structure. And the construction cost can be greatly reduced.

[Brief description of the drawings]

1 to 6 show an embodiment of the present invention. FIG. 1 is a partial plan view of a space truss structure, FIG. 2 is a front view thereof, and FIG. 3 is a partially enlarged side view thereof. 4, 5, and 6 are side views of the joint, FIGS. 7 to 12 show another embodiment of the present invention, and FIG. 7 is a partial plan view of the space truss structure. Fig. 8, Fig. 8 is its front view, Fig. 9 is its side view,
FIG. 10, FIG. 11 and FIG. 12 are side views of the joint part. 1 ... three-dimensional truss structure, 2 ... ball joint, 3 ... upper chord material, 4 ... upper chord material, 5 ... lower chord material, 6 ... belly material, 7 ...
Receiving seat, 8 ... purlin material, 9 ... roofing material, 10 ... lower chord material, 11 ... lower chord material, 12 ... upper chord material, 13 ... belly material, 14 ...
Ceiling receiving material (field material), 15 …… Ceiling material.

Claims (2)

(57) [Claims] 1. A plurality of rods as upper and lower chords, and a plurality of rods as abdominals are installed in the X and Y directions, and a plurality of rods as an abdominal material are installed obliquely to the X and Y directions. In the three-dimensional truss structure constructed by three-dimensionally joining the rod members through a ball joint, the rod members as the upper chord member and the lower chord member are formed from a shaped steel, and the rod made of the shaped steel is used. A bearing seat is interposed between the material and the ball joint, and the rod made of the shaped steel and the bearing seat and the bearing seat and the ball joint are joined by welding or bolting, respectively. Space truss structure characterized by the following. 2. A plurality of rods as upper chords and lower chords, and a plurality of rods as abdomen are installed in the X and Y directions, and a plurality of rods as abdominals are installed obliquely to the X and Y directions. In the method of constructing a three-dimensional truss structure constructed by three-dimensionally joining the rods of each other via a ball joint, the rods as the upper chord and the lower chord are formed from a shaped steel, and the upper chord is formed. A plurality of rods or lower chords, in the X and Y directions, a plurality of rods as the abdominal member, respectively installed in an oblique direction to the X and Y directions, and a rod made of the shaped steel and the ball joint And a rod made of the shape steel and the bearing and the bearing and the ball joint are joined by welding or bolting, respectively, and the upper chord and the lower chord are joined together. Three-dimensional truss structure by attaching purlin material and ceiling support material to each material Assembled unit body forming a part of the object, lifting the unit body to the installation position,
A construction method of a space truss structure, characterized in that the space truss structure is constructed by joining the structures together.