JPH0526123Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a basement construction material that constitutes the walls of a basement.

[Conventional technology]

In recent years, in order to increase the storage capacity of conventional underfloor storage units that utilize the underfloor space of kitchens, living rooms, etc.
There has been an increasing trend to install underground storage-type basements or basement units that are buried from below the floor to below the ground. and these basements
Various proposals have also been made to construct it from synthetic resin such as FRP.

By the way, the soil temperature in basements is low, especially in the summer, so when humid, high-temperature air enters the basement from outside, condensation occurs on the walls and floors that come into contact with the ground. There is a problem with the pressure that is applied, so the structural materials for constructing the ceiling, walls, floor, etc. of the basement must be made of materials that have heat insulating properties and strength.

Conventionally, to solve the above problem of condensation, a method has generally been adopted in which a hard urethane foam panel or the like is used in a sandwich structure between the FRP layers on both sides.

In addition to solving the above-mentioned problem of condensation, in consideration of workability and durability, we used glass fiber-reinforced cement instead of conventional concrete as the outer circumferential material of the basement itself, and made synthetic resin foam into the outer circumferential material. A panel assembly type with built-in heat insulating material is known. (For example, Utsukai 56-
(See Publication No. 87539).

[The problem that the idea attempts to solve]

Among those mentioned in the conventional technology, the former FRP
In the method of forming a hard urethane foam panel between layers into a sandwich structure, it is necessary to mold the hard urethane foam panel in advance, and
In particular, if the shape of the basement itself is complex, the pre-formed hard urethane foam panel itself needs to be cut to fit the shape of the basement and then pasted. It is difficult to attach the urethane foam panel only between the FRP layers in the necessary areas, and the interface between the FRP layer and the urethane foam panel is weak. It had problems such as:

In addition, in the latter method of incorporating a synthetic resin foam heat insulating material into the outer circumferential material made of glass fiber reinforced cement, it is necessary to form a hollow part in advance in the outer circumferential material to fill with foamed synthetic resin. To apply this method to FRP outer material,
The problem is that the hollow part has to be formed by bonding two pre-formed panels together, which requires multiple work steps including panel molding, bonding, and injection foaming, making the process cumbersome. be.

The present invention was devised in view of the above-mentioned problems of the conventional technology, and its purpose is to
It is an object of the present invention to provide a component for a basement that can be easily imparted with heat insulation properties and rigidity and is inexpensive.

[Means to solve the problem]

In order to achieve the above object, the basement component according to the present invention is made by laminating an intermediate layer made of a mixture of micro hollow spheres in a synthetic resin between a front layer and a back layer made of FRP.

[Effect]

The micro hollow spheres (micro hollow spheres) mentioned above are hollow micro spheres with an outer shell, unlike the air bubbles in synthetic resin foams in which gas is dispersed in the resin, and are generally microballoons (Emerson
&Cuming Co., Ltd. product name).

In contrast to the cells of ordinary synthetic resin foams, which are easy to flatten and have a polyhedral structure when the expansion ratio is high, in the case of synthetic resin mixed with microscopic hollow spheres having an outer shell, the cells are always spherical in shape.
In addition, they are completely closed cells, and have the advantage of increasing the rigidity of the synthetic resin.Furthermore, micro hollow spheres have the advantage of excellent fluidity and moldability even when mixed in a large volume.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 is a vertical cross-sectional view showing an example of a basement using structural materials according to the present invention, where 1 is the basement;
The upper opening 1a of the basement 1 is connected to a floor opening 2a formed in the floor 2 of the building, and 3 is a floor cover provided to cover the floor opening 2a and to be openable and closable.

As shown in FIG. 2, the component 10 of the basement 1 has an intermediate layer 10a made of micro hollow spheres made of polyvinyl chloride, unsaturated polyester resin, etc. as a matrix, and FRP layers on both sides of the intermediate layer 10a. 10b and 10b are stacked in a sandwich structure.

The intermediate layer 10a may be manufactured by spraying a mixture of glass fiber and resin with the micro hollow spheres by a spray-up method or the like, and laminating the intermediate layer 10a with the micro hollow spheres in advance. Alternatively, a sheet-like material preformed with a binder may be used, and the FRP layers 10b, 10b may be laminated and hardened by hand lay-up on both the front and back surfaces of the intermediate layer 10a. In addition, as shown in FIG. 2, in parts of the basement where particularly strength is required, the intermediate layer 10a made of micro hollow spheres may be multilayered to increase the thickness of the structural material 10 as a whole and increase the rigidity.

[Effect of idea]

As mentioned above, the basement component according to the present invention has the following features:
An intermediate layer made of a mixture of micro hollow spheres in a synthetic resin is laminated between a surface layer made of FRP and a back layer, and the micro hollow spheres with outer shells are dispersed within the intermediate layer. The air layers (bubbles) formed in the resin are always spherical, closed cells, and have excellent compressive strength, and by increasing the content of micro hollow spheres in the synthetic resin, it is possible to easily hold more air layers, which improves insulation. This has the effect of improving the properties of the material, creating a stronger intermediate layer than conventional synthetic resin foams, and improving the rigidity of the entire constituent material.

In addition, unlike conventional urethane foam panels and synthetic resin foams, this intermediate layer itself does not need to be pre-formed or have a hollow part in the outer peripheral material itself, and it does not need to be pre-formed like conventional urethane foam panels or synthetic resin foams. It can be easily molded using the same method as FRP molding, and the thickness of the middle layer can be made thicker or thinner at any time during lamination, so it can be easily applied to only the necessary parts of the basement component. , it is also possible to provide more heat insulation and rigidity.

Furthermore, since the front and back layers and the intermediate layer are integrated, there is no discontinuity or interfacial peeling, and in addition, even if the shape of the basement itself is complex, the intermediate layer can be freely formed.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing an example of a basement using the basement construction material according to the present invention, and FIG.
It is a partial sectional view showing the details of the structural material for the basement in the figure. Explanation of symbols, 1... Basement, 1a... Upper opening, 2... Floor surface, 2a... Floor opening, 3... Floor cover, 10... Constituent material, 10a... Intermediate layer, 10
b, 10b...FRP layer.

Claims (1)

[Scope of utility model registration request] A structural material for basements characterized by laminating an intermediate layer made of a mixture of microscopic hollow spheres in a synthetic resin between a surface layer and a back layer made of FRP.