JPH0422649Y2 - - Google Patents

Description

[Detailed description of the invention] The invention consists of laying a large number of foamed plastic plate-like insulation materials of approximately the same size and thickness on the upper surface of a horizontal slab, and forming a insulation layer by laying a large number of foamed plastic plate-shaped insulation materials that are rectangular in plan view. In a roof-top exterior insulation and waterproof structure with a waterproof layer on top of the insulation layer, the plate insulation under the waterproof layer warps and the waterproof layer becomes wavy, especially under the influence of outside heat on sunny days in the summer. This invention relates to a waterproof structure that is less likely to cause damage such as cracks or damage to the waterproof layer.

The so-called external insulation structure, in which a layer of insulation material is provided on the outside of the building frame of reinforced concrete buildings, wooden buildings, etc., has a higher insulation effect and prevents internal condensation compared to the internal insulation structure, in which a layer of insulation material is placed on the inner surface of the structure. In recent years, it has been increasingly used in cold regions.

However, on the other hand, when this type of external insulation structure is adopted on the roof of a building structure, the following problems may occur due to aging. On rooftops, especially on sunny days in summer, the surface temperature of the waterproof layer rises to about 90°C due to the influence of outside air heat, and the temperature of the internal insulation layer also rises to about 80°C.
For this reason, as shown in Fig. 3, a plate-shaped insulation material made of foamed plastic with a flat peripheral end surface is laid on the upper surface of the horizontal slab b, and a insulation layer c
, and furthermore, when a waterproof layer d is provided on the upper surface of the insulation layer c, the plate-shaped insulation material a warps due to the influence of outside heat, and the surrounding end surface becomes as shown by the dashed line in the figure. Not only does this cause the waterproof layer d to become wavy, which impairs its aesthetic appearance, but in the worst case, there is a risk that damage such as cracks may occur in the waterproof layer d. In order to deal with these problems, as shown in Fig. 4, notch steps e and e that are open upward are formed on the end faces of two adjacent sides of the plate-shaped heat insulating material a, and the notch steps e and e are formed on the end faces of the other two sides. It was devised to form engaging protrusions f, f that engage with the cutout steps e, e from above. In this case, the plate-shaped heat insulating material a on the side of the notch step e in the figure
When warping occurs, the engagement protrusion f that engages with the notch steps e and e from above effectively prevents the end face from lifting, but the plate on the side of the engagement protrusion f in the figure When warpage occurs in the heat insulating material a, it is impossible to prevent the end face from lifting as shown by the dashed line in the figure.

The rooftop insulation and waterproof structure of the present invention was devised in view of these conventional problems.In particular, due to the influence of outside heat on sunny days in summer, the plate-shaped insulation material under the waterproof layer The purpose is to reduce the possibility that the waterproof layer will warp and become wavy, or that damage such as cracks will occur in the waterproof layer. In order to achieve this purpose, in the present invention, a large number of foamed plastic plate-shaped insulation materials 1, which are rectangular in plan view and are formed to have approximately the same size and thickness in plan view, are laid on the upper surface of the horizontal slab A to form an insulation layer. In the rooftop outdoor insulation and waterproof structure in which a waterproof layer P is formed on the upper surface of the insulation layer B, the end surfaces 2, 2 of two adjacent sides of the foamed plastic plate-shaped insulation material 1, which is rectangular in plan view, are A protrusion 3 is formed in the entire thickness direction, and a part corresponding to the protrusion 3 when these plate-shaped heat insulating materials 1 are laid regulated on the upper surface of the horizontal slab A on the end faces 2, 2 of the other two sides is formed. Forms a concave groove 4 in which the entire protruding strip 3 is tightly fitted in the entire thickness direction, and connects the protruding strip 3 on the end surfaces 2, 2 of the adjacent end surfaces 2, 2 of the plate-shaped heat insulating material 1 on the upper surface of the horizontal slab A. The outdoor roof insulation and waterproof structure is constructed by forming a heat insulating material layer B by laying a large number of grooves 4 in a tightly fitted state.

The details of the rooftop exterior insulation and waterproof structure according to the present invention will be further explained based on the attached drawings.

On the upper surface of the horizontal slab on the roof of the building frame shown as A in the figure, a large number of foamed plastic plate-shaped insulation materials 1, which are square or rectangular in plan view and are formed to have approximately the same size and thickness, are laid to create a insulation layer B. Further, on the upper surface of the heat insulating material layer B, a waterproof layer P is provided by, for example, asphalt roofing, etc.
An external rooftop insulation and waterproof structure will be constructed. The foamed plastic plate-shaped heat insulating material 1 used to constitute the heat insulating material layer B is formed into a square or rectangular shape in plan view with approximately the same size and thickness, and has two adjacent end faces 2, 2. is the first in the entire thickness direction.
As shown in FIG.
. . . are formed continuously at a required interval, and these strip insulation materials 1 . In the part corresponding to 3, there is a concave groove 4 in which the entire protrusion 3 is tightly fitted in the entire thickness direction.
was formed. In the example shown here,
By providing the protrusions 3 at intervals that are approximately the same as their widths, grooves 4 are formed between the protrusions 3. That is, in this plate-shaped heat insulating material 1, protrusions 3 and grooves 4 are continuously and alternately formed on the peripheral end surface 2.

The foamed plastic used here is
Styrenic resins represented by polystyrene resins,
Examples include polyolefin resins such as polyethylene and polypropylene, polyvinyl chloride resins, and the like. Since the purpose here is outdoor insulation of the roof, in particular polypropylene, binary or more styrenic copolymers incorporating α-methylsterene, such as α-methylstyrene-styrene-acrylontrile ternary copolymer, are used. Those that have heat resistance such as coalescence exhibit excellent effects.

Therefore, the protrusions 3 on the end surfaces 2, 2 of adjacent plate-shaped heat insulating materials 1 on the upper surface of the horizontal slab 1 are formed.
The heat insulating material layer B is formed by laying a large number of grooves 4 in a tightly fitted state.

Due to this structure, the contact area between adjacent plate-shaped insulation materials 1 becomes relatively large, and the frictional force generated between the two increases, especially due to the influence of outside heat on a sunny day in summer. Even if internal stress occurs in the plate-shaped heat insulating material 1 in the direction of warping, the surrounding end surface 2 is less likely to be lifted. Therefore, it is less likely that the waterproof layer P will become wavy or that damage such as cracks will occur in the waterproof layer P.

Next, FIGS. 2B and 2C show other embodiments of the protrusions 3 and the grooves 4. First, shown in B is the protrusion 3.
It is formed into a circular shape with a portion cut out in plan view. Moreover, the one shown in C is one in which the protruding stripes 3 are formed into a trapezoidal shape in plan view. In this way, if the width of the protruding strip 3 is made wider on the distal end side or the central portion than on the proximal end 3' side, it becomes more effective in preventing lifting of the end surface 2 around the plate-shaped heat insulating material 1.

In the illustrated embodiment, a plurality of protrusions 3 are formed on the end surface 2 of one side of the plate-shaped heat insulating material 1, but it is also possible to form only one protrusion 3 on the end surface 2 of one side. It is.

In the rooftop outdoor insulation and waterproof structure according to the present invention as described above, the contact area between adjacent plate-shaped insulation materials 1 constituting the insulation material layer B becomes relatively large, and problems occur between the two. The frictional force increases, and even if internal stress occurs in the plate-shaped insulation material 1 in the direction of warping, especially due to the influence of outside heat on a sunny day in summer, the surrounding end surface 2 is less likely to be lifted up. . For this reason, it is less likely that the waterproof layer P will become wavy or that damage such as cracks will occur in the waterproof layer P.
Furthermore, since the work of laying the plate-shaped heat insulating material 1 on the upper surface of the horizontal slab A can be done by simply dropping it, there is no reduction in work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a perspective view partially cut away showing the outdoor roof insulation and waterproof structure according to the present invention; Fig. 2 A, B, and C are plan views showing examples of protrusions and grooves, respectively; and Fig. 3
4 are vertical cross-sectional views showing conventional rooftop insulation and waterproofing structures, respectively. A...Horizontal slab, B...Insulating material layer, P...Waterproof layer, 1...Plate-shaped insulation made of foamed plastic, 2
... end face, 3 ... convex stripe, 4 ... concave groove.

Claims (1)

[Scope of utility model registration request] On the upper surface of the horizontal slab A, a large number of foamed plastic plate-shaped insulation materials 1, which are rectangular in plan view and have approximately the same size and thickness, are laid to form the insulation layer B.
In the rooftop outdoor insulation and waterproof structure in which a waterproof layer P is formed on the upper surface of the insulation layer B, the end surfaces 2, 2 of two adjacent sides of the foamed plastic plate-shaped insulation material 1, which is rectangular in plan view, have a thickness. In addition to forming protrusions 3 in the entire direction, when these plate-shaped heat insulating materials 1 are regularly laid on the upper surface of the horizontal slab A on the end surfaces 2 and 2 of the other two sides, the parts corresponding to the protrusions 3 are A concave groove 4 is formed in the entire thickness direction in which the entire convex strip 3 is tightly fitted, and a plate-shaped heat insulating material 1 is formed on the upper surface of the horizontal slab A.
This outdoor roof insulation and waterproof structure is characterized in that a large number of these are laid by closely fitting the protrusions 3 and grooves 4 of adjacent end faces 2, 2 to form a heat insulating material layer B.