JPS58123960A - Roof structure - 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 The present invention relates to a roof structure, and more particularly to a walkable roof structure having a heat insulating layer disposed on the outside of the roof structure. The purpose is to propose a roof with an external insulation structure that can withstand walking, has excellent fire prevention and water-stop properties, and has excellent dimensional stability of the fatty water layer, durability, and workability.

External heating structures, which have a layer of insulation material on the outside of the roof structure, have attracted attention in recent years because they provide insulation on the outside of the building structure, which stabilizes the internal temperature and provides good livability, as well as being highly effective in saving energy. Abi is being put into practical use. Conventional externally insulated roofs have been constructed by laying a fatty water sheet made of plastic or the like as a base material on top of a heat insulating material such as a foamed plastic board placed on the outside of the roof structure. However, it is difficult to ensure that the roof with this structure is completely fireproof, and the fat-water sheet expands at high temperatures, causing wrinkles and impairing the stability of the roof.
It lacked durability and was prone to breakage, so there was a need for a replacement. In addition, in order to overcome these defects, methods have been taken to provide a protective layer by pouring mortar on top of it, but this increases the construction cost and increases the load on the structure. It wasn't the preferred method.

This development was taken as a result of the above-mentioned circumstances, and the gist is that a waterproof sheet is laid on the surface of the insulation base, which is made by laying insulation and noncombustible materials on the outside of the roof base structure.
Scissors waterproof sheet is a metal waterproof sheet that is made of a laminated and integrated bottom layer made of soft plastic or rubber, a bottom layer that is harder and more weather resistant than the bottom layer, and a bottom layer of the same material.The bottom layer is reinforced. A roof structure characterized in that the thickness ratio of the upper surface layer and the lower surface layer is in the range of 50,150 to 75/25.

III III (a), (1)) are examples of embodiments of the roof structure of the present invention. In this agricultural machine, a heat insulating non-combustible base is constructed by laying a heat insulating #2 made of a polystyrene foam board on the outer surface of a roof base structure 1 made of a concrete slab, and a non-combustible material 5 made of glass fiber reinforced gypsum board being laid on the surface thereof. The heat insulating material 2 and the non-combustible material 5 are fastened by fitting a disc Mi5 into the head part of the non-combustible material S of the anchor bolt 4 which is inserted into the base structure 1, and is pressed and fixed to the base structure. ing.

A waterproof sheet 6 is laid on top of this base structure 1 to construct 11 aircraft.

The waterproof sheet 6 has a thickness of 2 parts m, and the top layer 7 is made of 100 parts by weight of polyvinyl chloride, 3.5 parts by weight of a stabilizer, 50 parts of a plasticizer,
It is composed of a relatively hard weather-resistant sheet made by adding 25 parts of calcium carbonate as a filler and an ultraviolet absorber, and the top layer 8 is made of 2 parts of stabilizer and 60 parts of plasticizer per 100 parts by weight of polyvinyl chloride. , is composed of a relatively soft sheet to which 1.5 parts of calcium carbonate is added as a filler, and the upper surface layer 7 and the lower surface layer 8 are laminated and integrated, and the lower surface layer 8 is covered with a reinforcing fabric 9. . The thickness of the upper surface layer 7 is 1.5 mm, the thickness of the lower surface layer 8 is 0.7 m, and the reinforcing fabric 9
The laying position is approximately 0.6 cm from the bottom surface. This waterproof sheet 6 is attached to the upper surface layer of the disc 5, the soft part is applied with a spray agent, and the waterproof sheet 6 is fixed by floating it on the base, and the terminal edges are overlapped and heated together. and are joined together.

Even though this agricultural machine uses 1-combustible plastic foam as an insulating material, it has a non-combustible material on its surface and has no heat-insulating non-combustible base, so it is highly resistant to fire, and a waterproof sheet can be laid on its surface. Because of this, you can be sure of complete water-tightness.

Since the waterproof sheet used in the present invention has a hard bottom layer that is weather resistant, it does not easily deteriorate even if laid exposed and can withstand walking. In addition, since the lower layer is a soft part and a reinforcing fabric is laid inside, the coefficient of linear expansion is small even at high temperatures, and the dimensional stability is good and wrinkles do not occur.

Furthermore, the hard part and soft part are in harmony, providing excellent stability and elasticity when walking, and the lower layer can be heated and welded during construction, making it highly workable and watertight.

In this case, a plastic foam board, an inorganic fiber board, or the like is used as the heat insulating material, but polystyrene resin foam, hard polyethylene resin foam, urea resin foam, etc., which have relatively high compressive strength, are suitable. Noncombustible materials include asbestos slate board, flexible board, calcium silicate board, and MLC.
($1 Aerated Concrete) Thin plates, glass fiber-reinforced inorganic plates, etc. can be used, but among them, glass fiber-reinforced inorganic plates are the most preferred material due to their excellent dimensional stability and workability.

The hard part that makes up the upper layer of the waterproof sheet is made of a weather-resistant and durable resin composition made of polymers such as polyvinyl chloride, polyethylene, and synthetic rubber with stabilizers and ultraviolet absorbers added, as well as a filler. This reduces the expansion coefficient due to temperature changes.

The soft portion constituting the lower layer of the waterproof sheet is made of a composition prepared by adding a warming agent, a rubber plasticizer, etc. to a polymer such as polyvinyl chloride, polyethylene, or synthetic rubber.

The thickness ratio between the top layer and the bottom layer is in the range of 50150 to 75/25. Since the thickness of a waterproof sheet is usually 2 wm or less, if the thickness of the top layer is less than SO4, it cannot have a high degree of durability and strength to withstand walking. In addition, the lower layer needs to have a thickness of at least 25 mm in order to cover the fabric and impart elasticity to the sheet.

The reinforcing fabric laid in the lower layer of the waterproof sheet must have low elongation, high tensile modulus, and low linear expansion coefficient to restrain expansion of the sheet base material. At the same time, it is compatible with the base material, and the reinforcing fabric part that is tightly adhered to and laid on the sheet base material,
It must not create a cross-sectional defect where the resin base material is missing. Conventional textile-reinforced sheets have defects in cross-sectional areas, and electrical components and peeling occur due to external stress and thermal expansion and contraction stress, resulting in reduced durability.

In order to improve this drawback, the following woven fabric can be used to efficiently improve dimensional stability and at the same time prevent a decrease in durability due to material loss.

This reinforcing fabric is a lattice-like fabric using long fibers of untwisted or low-twist synthetic fibers or inorganic fibers with an elongation of 20 or less, and the warp and weft densities are each 10/2.5.
The fabric is 4aL or less.

This fabric has a coarse lattice shape, and the single fibers that make up the long fibers are not tightly bound and arranged in a nearly flat state. Therefore, when laid in the sheet base material, the woven fabric blends well with the base material and adheres closely, completely filling the lattice gaps, and since the woven fabric is thin, there is no loss of space, and the base material and the woven fabric are integrated into the sheet. Configure. In addition, the long fibers have an elongation of 20 or less, have a flat cross section, and are arranged in a straight line with almost no bending at the intersection of the warp and weft, so the elongation of this fabric is higher than that of conventional twisted yarns. Compared to the fabrics used and woven into calligraphy, it has an extremely low tensile modulus. Therefore, by reinforcing the waterproof sheet with this woven fabric, the durability and dimensional stability of the waterproof sheet can be further improved compared to the case where the waterproof sheet is reinforced with conventional woven fabric.

This fabric is made of polyester, nylon 66, nylon 6
Inorganic fibers such as synthetic fibers, glass fibers, and carbon fibers are used. In particular, polyester, nylon 66, and glass fiber are suitable because they are inexpensive, have high elastic modulus, and low elongation. Carbon fiber is also suitable in terms of physical properties, but has the disadvantage of high cost.

These long fibers are untwisted or with a low twist number of 100 twists/m or less, and are plain woven or leno-woven to form a lattice-like fabric. After shaving, heat treatment under tension reduces the elongation, increases the tensile modulus, and decreases the coefficient of linear expansion, and further improves the dimensional stability of the reinforced waterproof sheet, which is preferable. Also,
By heat-treating, the woven fabric's misalignment, yarn run, etc. are corrected, and the structure is stabilized, allowing it to be accurately and easily laid into the sheet base material. Furthermore, by adding melamine resin, vinyl chloride resin, etc. during heat treatment, the structure can be further stabilized and the conformability and adhesion to the sheet base material can be improved.

An embodiment of a reinforcing fabric having a lattice shape will be described with reference to the drawings. Figure 2 (a) and (su) show this fabric,
This is a lattice-like fabric in which two warps 10 and 10 are intertwined with a weft 11, and the fabric design is as follows.

Warp: Polyester long edge #250 denier (number of single threads 48, elongation [15%, number of twists 80 times/ia) 2, 7 per degree/2.543, Weft: Polyester long edge @ 1000 denier (number of single threads 192) book, elongation 14-1 untwisted) density 7/2.54α
, Heat treatment: Under tension, dry heat at 200°C for 40 seconds.The waterproof sheet shown in Figure 1(b), which was reinforced by laying the reinforcing lattice fabric thus obtained, was used as a base structure. As a result of floating and fixedly laying the waterproof sheet on the body as shown in Figure 1 (&), the waterproof sheet expands little even in high temperatures in summer (there are no wrinkles on the laying surface, it can withstand walking, and it is durable). In addition, the terminals could be welded and fixed with adhesive, resulting in excellent watertightness and workability.

The expansion coefficient 1k (0°C to 50°C) of the waterproof sheet with the structure shown in Figure 1 (11), which is reinforced with polyester, nylon 66, and glass fiber and reinforced with a leno weave lattice fabric, is as shown in the table below. .

[Brief explanation of the drawing]

Figures 1 (a) and (b) are a longitudinal sectional view of the roof structure and a longitudinal sectional view of the fatty water sheet, respectively, and Figure 2 (IL),
(t)) is a plan view and a sectional view of a grid-like fabric. 1. Roof base structure, 2. Insulation material, 6. Noncombustible material,
4. Anchor bolt, 5. Disc disk, 6. Cast water sheet, 7. Top layer, 8. Bottom layer, 9. Reinforcing fabric, 10. Warp, 11. Weft. Patent applicant: Asahi Kasei Kogyo Co., Ltd. Tsutsunaka Sheet Suisui Co., Ltd.

Claims (2)

[Claims] (1) Insulating material and non-combustible material are laid on the outside of the roof base structure, and fat water sheets are laid on both sides of the insulation base.
#llF water sheet is a composite water-repellent sheet made by laminating and integrating a lower layer made of soft plastic or rubber, a lower layer with a higher degree of II and better weather resistance than the lower layer, and an upper layer of the same material. A roof structure in which a reinforcing fabric is laid and the thickness ratio between the upper layer and the lower layer is in the range of 7" to 75/25. (2) The reinforcing fabric is a lattice-like fabric made of long fibers with an elongation of 512G or less and no twist or low me, and is characterized by having a thread count and a weft** of 10/2.541 or less, respectively. A roof structure according to claim 1.