JPH0249290Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention satisfies the necessary strength by appropriately arranging a plurality of thin-walled unit roofing materials and thick-walled unit roofing materials in the longitudinal direction, and minimizes the weight to the necessary minimum. Regarding large chevron roofing materials.

``Prior Art'' Conventionally, large-sized chevron roofing materials have been integrally molded in the longitudinal direction, or in the case of long spans in the longitudinal direction, they have been divided into appropriate unit lengths and then connected. However, in each case, the large-sized chevron roofing material as a whole was made uniform with a wall thickness determined according to the load conditions.

``Problem that the invention aims to solve'' However, large-sized chevron roofing materials are structural members without pillars or beams, and have a uniform thickness from one end to the other. Further, large-sized chevron roofing materials are subjected to loads due to their own weight, snow accumulation, wind pressure, etc., and the wall thickness is determined by the maximum value of the resulting bending moment.

The wall thickness at this time becomes the thickness of the entire large-sized chevron roofing material, but this thickness is wasted in areas where the load is not so great and the bending moment is small, and the weight of the large-sized chevron roofing material is This results in a secondary problem in that the structure becomes heavier than necessary, which places a heavy burden on the structure, and the steel materials of the structure also become larger. Furthermore, the roofing material is expensive and heavy, causing various inconveniences in transportation.

``Means for Solving the Problems'' Therefore, as a result of intensive research in order to solve the above-mentioned problems, the inventor has developed the present invention, which is a longitudinally elongated thin-walled unit made of metal with a large chevron-shaped cross section. roofing material and
This structure consists of thick-walled unit roofing materials with the same cross section and the same material, and these are appropriately arranged in the longitudinal direction and connected and fixed, so that stress generated in the longitudinal direction of the large mountain roofing material due to its own weight, snow accumulation, wind pressure, etc. Thick-walled unit roofing materials are used for large parts of the roof, and thin-walled unit roofing materials are used for other parts where the stress is relatively small.This reduces the weight of the large-sized chevron-shaped roofing materials and increases the strength. The above-mentioned problems have been solved.

"Example" Hereinafter, an example of the present invention will be described based on FIGS. 1 to 9. FIG. 1 shows a state in which the large-sized chevron roofing material A is used as a long-span roofing material.

A is a large mountain-shaped roofing material, which has a substantially mountain-shaped cross section, and ribs are formed in the longitudinal direction near the top and the tops of the sloped portions on both sides.

Further, a relatively narrow bottom portion is formed outwardly from the lower ends of both slopes of the chevron-shaped cross section, and a sloped edge facing outward and upward is provided from the outer end of this bottom portion, and the tip of this sloped edge It is bent toward the center of the roof material A.

This large-sized chevron roofing material A is formed by connecting and fixing a plurality of unit roofing materials. This unit roofing material includes a thin unit roofing material 1 with a wall thickness of about 2 to about 2.5 mm,
There is a thick unit roofing material 2 with a wall thickness of approximately 3 to 3.5 mm.
By connecting and fixing three to five of these in the longitudinal direction, the desired large-sized chevron roofing material A is formed (see FIG. 2). The means for fixing these unit roofing materials together is usually welding.
That is, the large-sized chevron roofing material A is an assembly in which the thin-walled unit roofing material 1 and the thick-walled unit roofing material 2 are appropriately arranged and connected and fixed.

3 is the support beam. This supports both longitudinal ends of the large chevron roofing material A, and is made of H steel or I steel.
Steel materials such as steel are used. The support beam 3 is installed horizontally on the upper part of the wall section 4 of the structure. In Figure 3,
It is a cross-sectional view showing a large-sized chevron roofing material A supported by support beams 3, with a thick unit roofing material 2 in the center of the large-sized chevron roofing material A, and thin unit roofing materials 1 at both ends thereof. A fixed position is shown.
One end is supported by a pin and the other end is supported by a roller, so that the large-sized chevron roofing material A shown in FIG. 3 is constructed as a simple beam. The maximum value of the bending moment that occurs when the large-sized chevron roofing material A is subjected to loads due to its own weight and climatic conditions such as snow accumulation and wind pressure occurs at the center of the large-sized chevron-shaped roofing material A. For this purpose, the thick unit roofing material 2 is placed in the center in the above case, and the thin unit roofing material 1 is placed and connected and fixed at locations where the bending moment at both ends is relatively small or zero. There is. Furthermore, in this case, the shearing force generated in the large-sized chevron roofing material A is maximum at both ends of the roofing material, since it is considered as a simply supported beam. The thickness of the thin unit roofing material 1 is determined in consideration of this maximum shearing force. Therefore, in the present invention, the arrangement of the thin-walled unit roofing material 1 and the thick-walled unit roofing material 2 is determined by considering only the bending moment applied to the large-sized chevron-shaped roofing material A.

Moreover, when the total length of the large-sized chevron roofing material A is long, the number of unit roofing materials is not limited to three, but may be configured using four or more.

Furthermore, thin unit roofing material 1 and thick unit roofing material 2
In this arrangement, the thick-walled unit roofing material 2 is always placed in the portion where the large bending moment occurring in the large-sized chevron-shaped roofing material A is large.

FIG. 4 shows a rectangular arch-shaped outer enclosure formed using the large-sized chevron-shaped roofing material A of the present invention.
This is an outer enclosure that has a roof part and a wall part integrated into one body. To connect the central part of the roof part and to connect the roof part and the wall part, flanges 5 are provided at both longitudinal ends of the large chevron roofing material A in the roof part, and flanges 5 are provided at one end of the wall part, and they are bolted together. It is closed. Further, the leg portions 6 and the base portion 7 of the rectangular arch-shaped outer enclosure are rotatably connected with pins. Therefore, no bending moments occur in the legs 6. FIG. 5 shows a bending moment diagram when a load F due to its own weight, snow accumulation, wind pressure, etc. is applied to this roof portion. FIG. 6 shows the arrangement of the thin-walled unit roofing material 1 and the thick-walled unit roofing material 2 forming the large-sized chevron-shaped roofing material A, corresponding to this bending moment diagram.

FIG. 7 shows a gate-shaped outer enclosure formed using the large-sized chevron-shaped roofing material A according to the present invention. The roof part is a large chevron roofing material A with a relatively long span and no flange connection parts. The wall portion and the roof portion are connected by bolts using flanges 5 provided on each side, thereby forming a rigid connection. Furthermore, the leg portions 6 of this gate-shaped outer enclosure are rotatably connected to the base portion 7 with pins. Therefore, no bending moment occurs in the legs 6.

Fig. 8 is a bending moment diagram when the gate-shaped outer enclosure is subjected to a load F due to its own weight and snow accumulation, and Fig. 9 is a bending moment diagram of the gate-shaped outer enclosure based on the bending moment diagram of Fig. 8. FIG. 2 is a diagram showing the arrangement of a thin unit roofing material 1 and a thick unit roofing material 2 that form a body.

``Effect of the invention'' The invention consists of a longitudinally elongated thin-walled unit roofing material 1 made of metal with a large chevron-shaped cross section, and a thick-walled unit roofing material 2 with the same cross-section and the same material. By properly arranging them in the longitudinal direction and connecting and fixing them, first of all, it is possible to form a large-sized chevron roofing material A that can sufficiently withstand various load conditions, and at the same time, it is possible to keep the weight to a minimum. The cost of materials used to manufacture the second large-sized chevron roofing material A can be reduced,
Thirdly, since the weight of the large-sized chevron roofing material A can be reduced, it is advantageous for transportation, movement, and lifting.

To explain these in detail, when a long roof, a rectangular arch-shaped outer enclosure, a gate-shaped outer enclosure, etc. are formed using large-sized chevron roofing material A, the large-sized chevron is The state of the bending moment that the entire roofing material A receives changes depending on the conditions of use.
Therefore, conventionally, the wall thickness of large-sized chevron roofing materials has been determined according to the following matters. That is, when large-sized chevron roofing materials are formed into various shapes, the wall thickness is determined by the maximum value of the bending moment caused by loads such as own weight, snow accumulation, wind pressure, etc. Therefore, in areas where the bending moment that occurs in large-sized chevron roofing materials is zero or sufficiently small, the wall thickness determined above will far exceed the wall thickness required for this area. Therefore, instead of being wasted, the weight of the large-sized chevron roofing material increases, which places a burden on the structure itself.

Focusing on this point, the present invention sufficiently withstands such load conditions and has a higher
This provides a large chevron roofing material A that is light in weight. In other words, when using large-sized chevron roofing material A on a roof or wall, the weight and snow accumulation on these materials,
Considering loads such as wind pressure, large-sized chevron roofing material A
The thin-wall unit roofing material 1 and the thick-wall unit roofing material 2 that form , can sufficiently withstand such load conditions, and can be made lighter than conventional large-sized chevron roofing materials that can withstand the same load conditions.

Moreover, since the weight of the large-sized chevron roofing material A can be reduced, the material cost of the large-sized chevron-shaped roofing material A can be reduced.

In addition, the large-sized chevron roofing material A of the present invention can be reduced in weight by using the thick-walled unit roofing material 2 only in the essential parts and using the thin-walled unit roofing material 1 in other parts, and is smaller than roofing materials of the same thickness. The weight is lighter. Therefore, it is advantageous for transportation, movement, lifting, etc. Furthermore, there is an advantage that the weight burden on the support beams 3 that support the large-sized chevron-shaped roof material A can be reduced, and the steel material of the support beams 3 can be selected from a smaller size.

In addition, when the large chevron roofing material A of the present invention is appropriately fixed to the thin unit roofing material 1 and the thick unit roofing material 2, if the central part is formed into a flat arch shape that is bent so as to be slightly higher, this The large-sized chevron-shaped roofing material A is hard to bend and can be made stronger compared to the linear large-sized chevron-shaped roofing material A.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and
Fig. 1 is a perspective view of the present invention, Fig. 2 is a perspective view of a thin-walled unit roofing material and a thick-walled unit roofing material as constituent members of the present invention, Fig. 3 is a sectional view of Fig. 1, and Figs. Figure 6 shows a schematic diagram, bending moment diagram, and configuration diagram when a rectangular arch-shaped enclosure is formed using the present invention.
7 to 9 are schematic diagrams, bending moment diagrams, and configuration diagrams of a gate-shaped envelope formed using the present invention. A...Large chevron roofing material, 1...Thin wall unit roofing material, 2...Thick wall unit roofing material.

Claims (1)

[Scope of utility model registration request] It consists of a longitudinally elongated, thin-walled unit roofing material made of metal with a large chevron-shaped cross section, and a thick-walled unit roofing material of the same cross-section and the same material, which are appropriately arranged in the longitudinal direction and connected and fixed. Large chevron roofing material.