JPH1082165A - Substrate strain absorbing floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor structure giving no adverse effect of a substrate to a floor finish material (surface material) by inserting a soft foam body layer between a floor heating concrete substrate and the floor finish material, and absorbing the strain and cracks of the substrate with the soft foam body. SOLUTION: Many holes 4 are provided on a foam body made of rubber or a synthetic resin such as polyethylene, polyurethane, polyvinyl chloride, SBR, NBR to form a soft foam body 3, and the soft foam body 3 is fixed by an adhesive on a concrete floor heating substrate 1 buried with a heating panel 2. The adhesive is applied in a stripe shape or in spots without being applied on the whole face. A floor finish material 5 made of a vinyl chloride sheet is stuck on it by an epoxy adhesive to form a heated floor. When the strain or cracks are generated by temperature changes on the concrete substrate 1, the strain is absorbed by the soft foam body 3, and no adverse effect is given to the floor finish material 5. A substrate strain absorbing floor structure can be easily obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor strain absorbing type floor structure which absorbs distortion and cracks of a floor heating floor and does not adversely affect a floor finishing material.

[0002]

2. Description of the Related Art Recently, floor heating has been widely used as a heating means. Underfloor heating is to heat the floor itself by embedding a hot or cold water distribution pipe or electric heating panel in the underfloor. However, the temperature of the underfloor surface rises to about 80 ° C. during heating and is 0 in winter when heating is not performed. ° C or lower, and the temperature difference is extremely large.

[0003] For this reason, the expansion and contraction of the floor ground becomes remarkable, and cracks are inevitably generated in the ground. With such deformation of the base, the effect is also exerted on the floor finish applied to the surface of the base, and the floor finish may be wavy or cracked.

[0004] In order to avoid such an adverse effect on the floor finish, conventionally, when bonding the floor finish to the floor substrate, a comparative method such as an acrylic emulsion adhesive is used for bonding the heating portion of the floor substrate. Use a non-curing type epoxy resin with high thermal flexibility, and use a thermosetting epoxy resin which is widely used for non-heating parts and is highly evaluated for its performance. I was dealing with it.
However, the time for which the two types of adhesives can be applied is considerably different from each other, so that the construction work becomes very complicated and causes a significant decrease in work efficiency. In addition, it is very difficult to absorb the distortion and cracks in the base due to the flexibility and weak adhesion of the acrylic emulsion adhesive. There is also the disadvantage of not being adhered to.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a flexible foam layer between a base material and a floor covering material to absorb distortion and cracks in the base material, so that the floor covering material is not adversely affected. The point is to provide a floor structure.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a floor strain absorbing type floor structure characterized in that a soft foam layer is interposed between a floor heating base and a floor finishing material.

As the soft foam, foams made of various synthetic resins such as polyethylene, polyurethane, polyvinyl chloride, SBR, NBR and rubber can be used. The foam may be a closed cell or an open cell, but an open cell is preferred from the viewpoint of avoiding blistering due to moisture or a solvent in the adhesive when the foam is adhered to the base and from the viewpoint of heat transfer.

[0008] The thickness of the foam layer is not particularly limited,
Usually, about 2 to 10 mm is preferable. If the thickness is less than 2 mm, distortion or cracks in the base cannot be sufficiently absorbed, and if the thickness is more than 10 mm, the foam exerts a heat insulating effect, and the heating efficiency decreases.

The flexible foam preferably has a 50% compressive strength according to JIS K6767 of about 0.5 to 10 kg / cm ² . The expansion ratio is preferably about 2 to 30 times.

It is preferable that the foam layer is perforated by punching in the vertical direction. The size of the hole is 0.5-5.0 mm in diameter, preferably 1.0-2.
0 mm. By making a hole like this,
Even if an adhesive is applied to the entire surface of the base to adhere the foam layer, the entire foam layer does not adhere to the base, so that distortion or deformation of the base can be partially avoided at the holes. In some cases, by applying the adhesive in the form of stripes or spots without applying the adhesive to the entire surface, an effect relatively close to the case of using a perforated foam can be obtained.
The holes are preferably provided at equal intervals as shown in FIG.
Preferably, the density of the holes accounts for 3 to 40%, preferably 5 to 10%, of the total foam surface area.

[0011] The adhesive between the foam layer and the floor covering material is also based on an adhesive.
It may be partial, such as spotted, or any.

[0012]

【Example】

Example 1 A part of the concrete foundation 1 is 910 mm x 1,820 m
m-sized electric heating panel 2 is embedded, and a perforated flexible foam layer 3 is bonded with an epoxy-based adhesive applied to the entire surface of the base, and an adhesive is applied to the backside of the sheet. The floor finishing material 5 was bonded. The flexible foam is made of polyethylene having an expansion ratio of 20 times and a compressive strength according to JIS K6767 of 1.5 kg / cm ² , a thickness of 4 mm, a diameter of the hole 4 of 1 mm, and a space between the holes 4. Is a distance such that the distance from each center is 4 mm, and the surface area of the hole per total surface area is 5%
And In the floor structure obtained in this manner, the surface temperature of the floor finishing material was set to 40 ° C. for 12 hours,
Temperature for 12 hours
Tested for years, no abnormalities occurred. on the other hand,
In the case where the foam layer was not provided, cracks occurred in a part of the floor finishing material.

Hereinafter, the embodiments of the present invention will be listed. (1) A floor strain-absorbing floor structure having a soft foam layer interposed between a floor heating base and a floor finishing material. (2) The floor strain-absorbing floor structure according to the above (1), wherein the flexible foam layer is vertically punched. (3) The soft foam has a 50% compressive strength according to JIS K6767 of 0.5 to 10 kg / cm ^2.
Or the ground strain absorbing floor structure according to 2. (4) The floor strain-absorbing floor structure according to (1), (2) or (3), wherein the expansion ratio of the flexible foam is 2 to 30 times. (5) The floor strain-absorbing floor structure according to (2), (3) or (4), wherein the hole formed by the punching has a diameter of 0.5 to 5 mm.

[0014]

[Effect] Since the distortion and cracks of the floor heating base are absorbed by the soft foam layer, the floor finishing material is not adversely affected by the floor heating base.

[Brief description of the drawings]

FIG. 1 is a sectional view of a floor structure according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a hole arrangement of a perforated flexible foam layer of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete foundation 2 Electric heating panel 3 Soft foam layer 4 Hole provided in the soft foam layer 5 Floor finishing material

Claims (1)

[Claims] 1. A floor-strain-absorbing floor structure comprising a soft foam layer interposed between a floor heating base and a floor finishing material.