JPS6022168Y2 - roof base plate - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a roof base plate.

In recent years, in wooden houses, roof base plates that are made of plywood, heat insulating material, and sheet-like materials are often used for rafters or main roofs.

However, this type of base board has a structure in which insulation materials are sandwiched together, despite the fact that there is a large difference in strength between the length and width of plywood and sheet-like materials due to the fiber arrangement and layer structure. As a result, it lacks compressive strength and bending strength, and in order to obtain the desired strength, it must be made of thick plywood or the like, making it heavy and increasing costs.

In order to eliminate such drawbacks, the present invention arranges the substrate and sheet material in the longitudinal direction of the roof base plate so that the substrate and sheet material alone exhibit the maximum tensile strength, and also It is formed into a cross section in which the waves advance in the length direction, and the waves have a spring function, and are longer than the natural length under this condition, so that they are fixed integrally to the synthetic resin foam in a so-called tensile state. We propose a roof base plate with improved bending and compressive strength, and by using a substrate with high bending strength, the board thickness is thinner than before, reducing weight and cost.

An embodiment of the roof base plate according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing the roof base material, which is an elongated body in which a synthetic resin foam 3 is integrally fixed between a substrate 1 and a sheet-like material 2.

To explain further, the board 1 is made of one type of hard board, sheathing board, or rock wool board, which is made of fibers and wood grains arranged along the longitudinal direction of the roof base plate in the direction of the arrow A, as shown in FIG. 2, for example. be.

This is because the strength against bending of the substrate 1 is significantly higher than that in the direction of the arrow, and also because it can be made thinner than before with the same bending strength, contributing to weight reduction and cost reduction.

Further, the hard base material is plywood or gypsum board, and the soft fiberboard is sheathing board.

If the substrate 1 is made of plywood, for example, a 3-ply structure, as shown in Figure 2, the fiber direction is the same as the top plate 1a, which is the same as the top plate 1a. It is constructed like the back plate 1c of the direction, and in the case of gypsum board, the degree of the base paper for gypsum board has a great influence, and since the fibers of the base paper have directionality, the directionality of the fibers is The paper is made in the same direction as the longitudinal direction of the base plate.

Furthermore, in the case of sheathing boards and rock wool boards, the fibers are formed in the longitudinal direction of the substrate 1 by a paper-forming method, or by discharging from only one direction in several stages during molding, and then molding, etc. It's like they're arranged.

Note that the substrate 1 is a long body, and its thickness is 3rIrIr.
L~20TIr! Nth place, size is 900X 1800m
m is the standard.

The sheet-like material 2 has the same size as the substrate 1, and is used to make the roof base plate have a sand inch structure and to strengthen the bending strength.

The structure is formed in the so-called direction (width direction) orthogonal to the longitudinal direction of the substrate 1 so that waves propagate in the longitudinal direction of the substrate 1, as shown in FIG. A sheet-like material 2' having a length L□ is fixed to a synthetic resin foam 3 while being stretched to a length h as shown in Fig. a.

Furthermore, as shown in FIG.
a, 2b... have a spring function (elasticity) between them.

Note that the difference between L2 and Ll is the tension in the sheet-like material 2, and the sheet-like material 2 is fixed integrally with the synthetic resin foam 3 under this tension.

Furthermore, the material of the sheet-like article 2 is asbestos paper, kraft paper, gypsum paper, or nonwoven fabric laminated with either a synthetic resin film or metal foil as a reinforcing material.

In addition, the synthetic resin foam 3 functions as a heat insulating material and an adhesive, and is made of, for example, polyurethane foam, polyisocyanurate foam, fail foam, vinyl chloride foam, polyethylene foam, etc. The foamed fibers are closed cells and thick. The height is about 5-5oTrrIrL.

Further, the size is the same as that of the substrate 1 and the sheet-like material 2, and the compressive strength of the foam itself is, for example, about 1.1 kg/c1ft.
That's all.

In addition, the substrate 1 and the sheet-like material 2 are bonded together at the same time as the foam is formed through the self-adhesive properties of the synthetic resin foam 3.

The table below shows a performance comparison between the roof base plate according to the present invention and conventional products.

Substrate 1 is made of plywood with a thickness of 9TrrIn1 and 5 plies, and the fiber direction of the top, core, and back plates is the same as the longitudinal direction of the roof base board.Substrate 1' is made of gypsum board and has the fibers of the base paper for the board. The direction is the same as that of the roof base plate, the substrate 1 is a sheathing insulation board made in the same longitudinal direction as the roof base plate, and the sheet material 2 is made of kraft paper with a weight of 190g/d1 and a 20μ aluminum foil. The wavy height difference is 11rrIIL and L2-Li=10mm, the fiber direction of the kraft paper is the same as the longitudinal direction of the substrate 1, and the synthetic resin foam 3 is polyurethane foam (bulk specific gravity 0.030). The thickness is 167 Mt, and the raw material is discharged between the substrate 1 and the sheet-like material 2 under tension and fixed together, and the synthetic resin foam 3
This was then left for five days.

On the other hand, the conventional roof base board A is a commercially available plywood board with alternating fiber directions, B is a commercially available gypsum board, C is a commercially available sheathing insulation board, and S is a commercially available gypsum board.
The synthetic resin foam 3 is the same as that of the present invention, in which the fiber direction is ignored and the sheet-like material is a flat plate and is placed with its natural length.

Furthermore, the bending test is conducted according to JIS-A-1408, and the size of the test piece is No. 3 test piece.

Furthermore, a load was applied to one surface of the substrate. As mentioned above, the strength directions of the substrate 1 and the sheet-like material 2 are arranged in the strongest direction and matched with the longitudinal direction of the roof base plate, and the structure is in a tensile state, so the bending strength is further strengthened. It's clear what happened.

In addition, the compressive strength is 1.1 to 1.9 kg/al.
1, and was able to withstand a snowfall of 400 ko/-.

What has been described above is only one embodiment of the roof base plate according to the present invention, and fillers such as perlite grains, vermiculite, borax, glass fiber (1rIr
! n~1-12~10cm), artificial aggregate can also be distributed to contribute to improving the compressive strength.

In addition, it can be used not only for roof substrates but also for outer walls and floor substrates.

As described above, according to the roof base plate according to the present invention, the fiber direction of the substrate is arranged along the longitudinal direction of the base plate,
In addition, the fiber direction of the sheet-like material is arranged in the same manner as above, and the waves in the direction perpendicular to the longitudinal direction of the roof base plate are formed so as to proceed in the longitudinal direction. The length matches the length of the board. Because the synthetic resin foam is integrally interposed between both members, the strength of each component and the structure work synergistically, making it stronger than conventional roof base plates. It has the characteristic that it can be used as a roof base plate with 19 types of rear parts.

Furthermore, since the strength of the constituent materials is high even if the thickness is the same, thinner base materials can be used than before, making it possible to reduce weight and cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the roof base plate according to the present invention, and Figs. 2, 3 a, b, and 4 show examples of the constituent materials of the roof base plate used in the present invention. FIG. 1...Substrate, 2...Sheet-like material, 3.
...Synthetic resin foam.

Claims (1)

[Scope of utility model registration request] A synthetic resin foam is integrally fixed between a rectangular substrate in which fibers are arranged in a direction that opposes bending in the longitudinal direction, and a sheet-like material. A roof that has a continuous shape toward the top, has a spring function between the waves, and is integrally fixed to the synthetic resin foam with a stretched length of the sheet-like material itself. Base board.