JPS61211464A - Twist truss - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a twist truss that constitutes the framework of a tower-like structure.

(Prior Art) and (Problems to be Solved by the Invention) The structure of a truss frame in a conventional tower-like structure consists of horizontal and vertical diagonal members connecting the nodes of horizontal members and vertical members. However, since there is a horizontal diagonal member in the space in the axial direction of the truss, there are drawbacks such as the inability to use the space as a space for an elevator or the like.

(Means for Solving the Problems) The present invention has been proposed to solve these problems, and consists of a plurality of polygons formed by connecting horizontal members at nodes located at the vertices of polygons. The rectangular structural frames are arranged at intervals on the same axis so that the corresponding nodes of the same adjacent polygonal structural frames are located ms apart from each other, and the corresponding nodes of the adjacent polygonal structural frames are arranged at intervals. This invention relates to a twist truss characterized by connecting diagonal members in between.

(Function) and (Effects of the Invention) As described above, in the twist truss according to the present invention, a plurality of polygonal structures formed by connecting horizontal members at nodes located at the vertices of the polygons are They are arranged at intervals on the axis, and are positioned at an angle such that the corresponding nodes of adjacent polygonal frames are im* to each other, and the corresponding nodes of the same adjacent polygonal frames are Since the diagonal members are connected in between, the diagonal members are spirally continuous on the outer surface of the truss and therefore effectively resist torsion acting on the truss.

In addition, in the truss of the present invention, the polygonal structural frames are arranged on the same axis, and the diagonal members are spirally arranged on the outer surface of the truss. Since elevators and the like can freely pass through the hollow space, it is possible to make effective use of the hollow space.

In addition, since diagonal members connecting corresponding nodes located at angles starting from each other in adjacent polygonal frames bear axial force and orthogonal shearing force, By adjusting the spacing between the frames, it is possible to construct a rational frame according to the stress ratio between axial force and shearing force.

(Example) The present invention will be described below with reference to the illustrated embodiments.

(Shun is a rectangular frame made by connecting four horizontal members (1) at nodes located at the vertices of the square, and is arranged in rows at a predetermined interval along the same axis, and The corresponding node P m q * ry ' of the frame (A) is at an angle of 45° a
They are arranged in such a way that they are located in the same direction.

Furthermore, the corresponding nodes P of the adjacent quadrangular constructions (A) (A).

between 1, p, between q, between q, between q, between q, between 1 and r, between 1, r
, 5 Kennami FC! , , 9 and 'sP between diagonal members (
2) are connected to form a twisted truss.

In the figure (3) is a diagonal line in the top quadrangular construction (ni).
The installed horizontal diagonal members stabilize the rectangular structural surface at the end of the truss in-plane, so that the frame as a whole forms a stable frame.

According to the above embodiment, the diagonal members (2) connected between the corresponding nodes of each quadrangular structure (A) are continuous in a spiral shape on the external structure surface of the truss, so that the diagonal members (2) connected between the corresponding nodes of each quadrangular structure (A) are spirally continuous, so that the diagonal members (2) are connected to each other in a spiral manner on the outer structure surface of the truss. Furthermore, since the truss does not require a horizontal diagonal member at the intermediate node, there is a hollow part extending in the axial direction of the truss, and an elevator etc. can freely pass through the hollow part. It is applied to various structures that utilize hollow parts, such as elevator test towers.

In addition, since the diagonal members (2) bear axial force and orthogonal shearing force, the structure is adjusted according to the stress ratio of axial force and shearing force by increasing wtpm between adjacent quadrangular structures (A1). A rational and economical structure can be constructed.

5 to 7 show nodes of the twist truss,
Joint pieces (5) are provided protruding from the outer periphery of the hollow spherical cast steel joint fitting (4) in directions perpendicular to each other.
) to which a horizontal member (1) is joined via a joint (6).

Further, the end of the diagonal member (2) is joined to a protrusion protruding from the outer periphery of the joining fitting (4) of the hollow sphere.

Figure 8 shows the diagonal member positioning jig (B
), and on a pair of lower orthogonal members (8) (8) bridged between the opposing horizontal members (1) of the quadrangular structure (A), there are gate forms (9) (9) perpendicular to each other at the top. The gate frame (9) has diagonal support recesses (1
A supporting piece αQ having a diameter of 0α) and movable along the top piece of the portal frame (9) is disposed, and a recessed portion (1
0α) (10α) and diagonal member (2) T-fitted to the same diagonal member (
2) is used for positioning.

Perform the same positioning and place the horizontal member (1) at the top of the diagonal member (2).
ft After installation, the support piece (move the support piece 101 along the top piece of the portal frame (9) toward the central axis of the square structure and attach it to the jig) is rotated by 45 degrees at each joint and mounted. It is something to be replaced.

That is, the diagonal member positioning jig (B) described above is a combination consisting of the top piece of a gate frame and a support piece for positioning the diagonal member in the construction of a steel tower or the like composed of horizontal members and diagonal members. An arm portion that holds the diagonal member in a predetermined position, a column portion that holds the diagonal member at a predetermined height, and the arm portion and the column portion are attached to the horizontal member such as the steel tower. The diagonal member positioning system is composed of a lower horizontal member that supports the horizontal member at a predetermined position, and is moved upward as the erection of the steel tower, etc. progresses, and is used to carry out the erection of the steel tower, etc. It is a jig (to).

Conventionally, the structure of steel towers, etc., which is composed of horizontal members and diagonal members as shown in Fig. 1, is such that the construction accuracy of the tower body is affected by changes in the mounting position of the diagonal members. However, it was very difficult to construct this structure with good sliding properties.

That is, an effective means for firmly holding the diagonal member t in a predetermined position has not been realized.

The above-mentioned diagonal member positioning jig (B) U can easily temporarily fix the upper part of the diagonal member, so the use of the same jig (B) eliminates the above-mentioned difficulty, and therefore improves the safety in the construction work of steel towers, etc. This has the synergistic effect of increasing construction efficiency and, therefore, increasing the efficiency of erection work.

Although the present invention has been described above with reference to embodiments, the present invention is of course not limited to such embodiments, and the design of each structure may be modified without departing from the spirit of the present invention. be.

[Brief explanation of drawings]

FIG. 1 is a front view showing one embodiment of the twist truss according to the present invention, FIGS. 2 and 3 are solidification, and FIG. 5 is an enlarged front view of the truss node, and FIGS. 6 and 7 are respectively shown in the direction of arrows Vl-V1 in FIG. Solidification - Fig. 1 and Fig. 8 are oblique views of the diagonal member positioning jig.

Claims (1)

[Claims] Multiple polygonal frames made by connecting horizontal members at nodes located at the vertices of the polygons are spaced on the same axis so that the corresponding nodes of adjacent polygonal frames are located close to each other. The twist truss is characterized in that the twist truss is formed by connecting diagonal members between corresponding nodes of the adjacent polygonal frames.