JPH0444555A - Truss - Google Patents

Abstract

PURPOSE:To make construction work easier by a method in which a truss is,made up of a paper cylinder, reinforcing bars provided inside of the paper cylinder, and joints, in which they are integrated by applying a tensile stress to the reinforcing bars and by applying a greater compression stress than tension to be occurred later by external forces to the paper cylinder. CONSTITUTION:A truss is made up of a paper cylinder l, a reinforcing bar 2 provided in the hollow of the cylinder 1, and a joint 3 to connect them. The bar 2 is thrust through the cylinder 1 and the joint 3, and the upper and lower ends of the bar 2 are clamped with nuts 5 through a seat plate 4 to apply a tensile stress to the bar 2. Also, a compression stress is applied to the cylinder 1 to form a support. One set of the supports are connected through the joint 3 with the cylinder 1 and the bar 2 by means of a connecting lever 6 to make up a necessary form of frame. The strength of the truss can thus be raised.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is directed to a structure made up of a plurality of elongated bar-shaped hardware, that is, a column when placed vertically, a beam when placed horizontally, and a roof when combined horizontally. This relates to a structure.

(Conventional technology) Conventionally, this type of truss is shown in Fig. 2(a).

As shown in (b), it was constructed by combining a plurality of elongated iron pipes 10 and connecting the connecting rods 11 of the same iron pipes by welding.

(Problems to be Solved by the Invention) However, the conventional structure of the truss has problems in that the weight of the product is large, the construction thereof requires a lot of effort and time, and the product cost is high.

Therefore, the present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to make the product lightweight and easy to handle, shorten the construction period and reduce the construction cost, and furthermore, the product itself can be made inexpensive. The purpose of this invention is to provide a truss that can

(Means for Solving the Problems) In order to achieve the above object, the present invention is composed of a paper tube, reinforcing bars and joints provided in the hollow interior of the tube, and when assembling, the reinforcing bars are pulled and stress is applied to the reinforcing bars. The tensile stress is applied to the paper cylinder so that it is integrated with a compressive stress that is larger than the tensile stress that will occur later due to an external force.

(Function) The present invention combines paper tubes in place of iron pipes as in the past, thereby making handling easier, making the product lighter, and making the product itself cheaper. Furthermore, the strength of the truss itself increases because the reinforcing bars are subjected to tensile stress and the paper tube is subjected to compressive stress that is greater than the tensile stress that will occur later due to external forces.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram showing a cross section of the main part of the truss according to the present invention, which is composed of a paper tube 1, reinforcing bars 2 provided inside the hollow interior thereof, and a joint 3 for joining these.

This paper tube 1 is made of a paper material made by hardening wood fibers with adhesive, or a hollow tube made by winding thin strips in multiple layers.
A paper cylinder 1 cut to an appropriate length is constructed into a single support of the required length via a plurality of joints 3, but during construction,
A reinforcing bar 2 is passed through a paper tube 1 and a joint 3, and its upper and lower ends are tightened with nuts 5 through a seat plate 4 to apply tensile stress to the reinforcing bar 2, and compressive stress is applied to the paper tube 1.

A plurality of pillars constructed in this way were made into one set, and each pillar was connected via a joint 3 to a paper tube 1 and a reinforcing bar 2 with a connecting rod 6 in the same manner as described above, thereby constructing a frame of the required shape. It is something.

Note that joint 3 is formed from a block of wood or metal.
ζ may be used, or may be formed by bending a plate-like metal material into a predetermined shape.

(Effects of the Invention) As explained above, since the truss according to the present invention is formed of a cylinder made of the above-mentioned paper material as the main material, the product can be made light in weight, easy to handle, and shortened in construction time. It is possible to shorten the time and reduce construction costs. Furthermore, the product itself can be made cheaper. Furthermore, the reinforcing bars are subjected to tensile stress, and the paper tube is subjected to compressive stress that is greater than the tensile stress that occurs later due to external forces, so the strength of the truss itself can be increased.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional configuration diagram of essential parts showing an embodiment of the truss according to the present invention, and FIGS. 2(a) and 2(b) are configuration diagrams showing a conventional truss. 1... paper tube, 2... reinforcing bar, 3... joint, 4
...Seat board, 5...Natsuto. Figure 2

Claims (1)

[Claims] Consisting of a paper tube, reinforcing bars and joints installed inside the hollow interior, stress is applied by pulling the reinforcing bars during assembly, tensile stress is applied to the reinforcing bars, and compressive stress that is greater than the tensile stress that occurs later due to external force is applied to the paper tube. A truss constructed to be integrated by applying