JPH07180217A - Double pipe type truss beam - Google Patents

Abstract

PURPOSE:To form a truss, by which joining is performed simply similarly to a single-layer pipe truss, fitting of a facing material is facilitated, and which has satisfactory bending rigidity in the out-of-plane direction by integrating a top cord and a bottom cord formed on pipes with a web. CONSTITUTION:A top cord 1 and a bottom cord 2 are formed into two, upper and lower pipes. The space between the top cord 1 and the bottom cord 2 is farmed on a web 3 to integrate the top cord and the bottom cord with each other. The end parts of pipes are formed to be flat longitudinally, and the end parts of the top cord 1 and the bottom cord 2 are formed into the plate-like joint parts 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double pipe type truss beam capable of forming truss structures having various shapes.

[0002]

2. Description of the Related Art Single-layer pipe truss beams with a single pipe are mainly used in truss structure sports facilities, roofs, atriums, and the like. Also, as a truss structure, a multi-layer pipe truss is known in which two pipes are vertically attached to a hub which is a joining member of the truss.

[0003]

A single-layer pipe truss beam can be manufactured by simply flattening the end of the pipe to form a plate-shaped mounting portion, and since it can be joined simply by inserting it into a hub, productivity is improved. Although it is good, the truss structure composed of faces has a problem that it is difficult to construct a truss having a large span due to lack of bending rigidity in the out-of-plane direction.

Further, since the truss structure has a complicated shape, mounting of a finishing material such as an exterior is restricted, and therefore, it is necessary to construct a base material for mounting the finishing material. There is also a method of performing the construction for each block as a means for increasing the efficiency of this construction, but when the base material for the exterior is different, the bonding layer becomes a multi-layer, so that there is a problem that a post-construction portion is generated.

The multi-layer pipe truss beam has a three-dimensional structure in terms of strength, so that it has a rational truss structure, but the joining is more complicated than that of a single-layer structure, and the block method is used for the construction. When this is performed, there is a problem that the workability of the joint is significantly reduced.

Further, since the finishing layer can be attached only from one side, the work is carried out on the inside of the truss where the workability is poor, and there is a problem in construction efficiency.

The present invention was conceived in order to solve the above-mentioned problems of the prior art, and its purpose is to simply connect the pipe truss beam as in the case of a single-layer pipe truss beam, and to attach a finishing material over the pipe truss beam. It is also an object of the present invention to provide a double-pipe type truss beam that can be formed without using a base material and can easily form a truss having sufficient bending rigidity in the out-of-plane direction.

[0008]

According to the features of the present invention according to the above object, the upper chord member and the lower chord member are formed into two pipes, an upper chord member and a lower chord member, and a web is formed between the upper chord member and the lower chord member. The material is integrated, the end of the pipe is vertically flattened, and the ends of the upper chord and the lower chord are formed into a plate-shaped joint to form a double truss beam.

Another feature of the present invention is that the web or the upper and lower chord members are provided with projections for attaching the finishing material in the longitudinal direction.

[0010]

[Operation] In the above configuration, the upper chord member and the lower chord member are formed on the pipe, but since they are integrally formed with the web, the joining is simple as with the single-layer pipe truss beam, and the constructed truss is three-dimensional. Since it has a structure, it becomes rigid outside the surface, and it is possible to construct a large-span truss dome.

Further, since the finishing material such as the exterior material can be attached by the protrusions provided on the web or the upper and lower chord members, the base material for the finishing material is not required.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the figure, 1 is an upper chord member and 2 is a lower chord member, which are formed in two pipes, one above the other. A web 3 integral with the pipe is formed between the upper chord member 1 and the lower chord member 2, and the upper chord member 1 and the lower chord member 2 are integrated by the web 3. The ends of the pipes are formed vertically flat, whereby the ends of the upper chord member 1 and the lower chord member 2 are vertically flat plate-like joints (slot fillers) 4, 4. A plurality of ridges 5 and 5 for joining are formed vertically on both side surfaces of the joint portions 4 and 4 together with the end portions of the web 3, and a supporting member having a U-shaped cross section is formed at the center of both side surfaces of the web 3. A frame 6 is provided in the longitudinal direction as a protrusion for attaching the finishing material by any means.

The upper chord member 1, the lower chord member 2 and the web 3 can be formed by extruding aluminum. It is also possible to flatly press and form a large-diameter aluminum tube. In extrusion molding, the web 3 is formed in a single layer as shown in FIGS. 2 (A) and (B), but in press molding it becomes a multilayer as shown in FIGS. 3 (A) and (B).

In forming the joints 4 and 4 at both ends, as shown in FIG. 4, the upper and lower end portions of the web 3 are obliquely cut off by the amount of protrusion to the inside of the pipe due to flattening, and the protrusion space is provided. 7 and 7 are formed.

In the double-pipe type truss beam having the above structure, the upper chord member 1 and the lower chord member 2 are integrated via the web 3, so that when the truss is constructed, as shown in FIGS. The hub 8 can be used as the joining member. As in the case of the single-layer pipe truss beam, the joining through the hub 8 is performed by inserting the plate-like joining portion 4 into the fitting groove 9 radially provided on the hub 8 from above or below to make the hub 8 up and down. All you have to do is bolt the washer 10 to the end and fix it.

Further, the exterior finishing material 11 such as a sash or a panel is mounted by previously inserting the sealing material 12 into the supporting frames 6 and 6 provided on the side surface of the web 3 and fitting it to the hub 8. To the supporting frames 6 and 6 of the pair of bonded truss beams,
It suffices to insert a finishing material 11 formed in a triangular shape from the opening side before joining, and use this as a block to join a plurality of them together, and thereby the finishing material 11
It is possible to assemble a dome-shaped or flat truss with attached.

In the embodiment shown in FIG. 7 and subsequent figures, the support frame 6 serving as a protrusion for mounting the finishing material is provided on the upper surface of the upper chord member 1 and the lower chord member 2.
This is the case where it is provided integrally with the lower surface of the. In this case, the support frames 6 and 6 have a T-shaped cross section, and can be integrally formed in the longitudinal direction at the same time when the upper chord member 1 and the lower chord member 3 are extruded. Both ends of these support frames 6 and 6 are cut by a required length so as not to hinder the press forming of both ends of the upper chord member 1 and the lower chord member 2, and after the cutting, ends of the upper chord member 1 and the lower chord member 3 are cut. Can be formed into the plate-like joint portions 4 and 4 by pressing flatly.

The supporting frame 6 on the upper surface of the upper chord member 1 serves as a projection for mounting the finishing material 11 for exterior use, and the supporting frame 6 on the lower surface of the lower chord member 2 is a so-called interior finishing material 13 such as a room ceiling. It can be used as a mounting protrusion. The finishing materials 11 and 13 can be attached to the support frames 6 and 6 by the same procedure as in the case of attaching to the support frame 6 on the side surface of the web.

In the case of a truss structure which does not require the finishing material 13 for the interior, the support frame 6 on the lower chord member side is omitted and the support frame 6 is integrally formed only on the upper chord member 1.

[0020]

According to the present invention, the upper chord member and the lower chord member are placed in the upper and lower portions.
In addition to forming the pipe of this book, the upper chord member and the lower chord member were formed into a web to integrate the upper and lower chord members, and the pipe end was formed flat to form a double pipe type truss beam. Play.

Like the multi-layer pipe truss beam, it is formed of two pipes at the top and bottom, but since it is formed integrally with the web, it can be configured into a truss via a hub in the same manner as the single-layer pipe truss beam. Also, since the truss has a three-dimensional structure, a rigid truss can be obtained out of the plane by simple joining, and construction of a large-span truss dome is also possible by simple joining.

Since the web or the upper and lower chord members are provided with the projections for attaching the finishing material, the projections can directly attach the finishing material such as the sash or the panel over the truss beam. Therefore, the conventional single layer pipe Since the truss beam does not require an indispensable base material, it is possible to shorten the work time required for attaching the finishing material. Further, there is an advantage that the block construction method can be adopted to perform efficient construction, and a finishing material for interior can be attached if necessary.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of a double pipe type truss beam according to the present invention.

FIG. 2A is a vertical cross-sectional view of a central portion of a double pipe type truss beam of the present invention formed by extrusion molding, and FIG. 2B is an end view.

3A is a vertical cross-sectional view of a central portion of a double pipe type truss beam of the present invention formed by press molding, and FIG. 3B is an end view thereof.

FIG. 4 is a side view showing an end treatment of the web before forming the end of the pipe.

FIG. 5 is a partial plan cross-sectional view showing a joined state with the hub and a mounted state of the finishing material.

FIG. 6 is a vertical sectional front view of the same.

FIG. 7 is a side view of a double pipe type truss beam in the case where projections for mounting a finishing material are integrally formed on the upper chord member and the lower chord member.

FIG. 8 is a vertical cross-sectional view of the central portion of the above.

FIG. 9 is a plan cross-sectional view showing a joined state with the hub and a mounted state of the finishing material.

FIG. 10 is a vertical sectional front view of the same.

[Explanation of symbols]

 1 Upper chord material 2 Lower chord material 3 Web 4 Joining part 3 Projection 6 Support frame for finishing material 7 Overhanging space 8 Hub 9 Fitting groove 10 Washer 11 Finishing material for exterior 12 Sealing material 13 Finishing material for interior

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenichi Sugisaki Shimizuura 1-3-2 Shimizu Construction Co., Ltd. Minato-ku, Tokyo

Claims (2)

[Claims] 1. An upper chord member and a lower chord member are formed in upper and lower two pipes, and a web is formed between the upper chord member and the lower chord member to integrate the upper and lower chord members, and the pipe ends are vertically flat. A double pipe truss beam, which is formed by forming the ends of the upper and lower chord members into a plate-shaped joint. 2. The double-pipe type truss beam according to claim 1, wherein the web or the upper and lower chord members are provided with projections for attaching the finishing material in the longitudinal direction.