JPH0799045B2 - Floor finish - Google Patents

Description

TECHNICAL FIELD The present invention relates to a floor finishing material as a building interior material.

[Conventional technology]

Carpets have been the mainstream flooring materials for conventional apartments. However, recently, wood floor finishing materials have begun to be reconsidered from the aspect of hygiene such as generation of mites and easy dust on carpets and lack of natural feeling. However, when this wood-based finishing material is used as a floor finishing material for condominiums, there is a major drawback that the floor impact sound insulation is poor. That is, floor impact sounds (lightweight floor impact sounds) such as the footsteps of the upper floors and the sound of dropping objects are transmitted downstairs,
There was a noise complaint. Therefore, a product was developed in which foamed plastic (a low foamed polyethylene foam having a thickness of 2 mm) was attached to the back surface of a wood-based surface finishing material having a thickness of 9 to 12 mm to cope with a lightweight floor impact sound. The foam at floor covering which is provided on the lower layer of plastic, since the static spring constant also for local loads of 100 cm ² to form a thickness of the buffer layer to 4mm was 25kg / cm · cm ² greater than the sound insulation performance It was not able to meet the required level (L-55 for a lightweight impact source). If you try to meet this requirement,
By increasing the thickness of the foamed plastic layer on the back surface of the surface finish material to about 15 mm, the static spring constant of the foamed plastic layer for a local load of 100 cm ² is 25 kg / cm ・ cm ²
I needed to:

[Problems to be solved]

The conventional floor finishing material having a foaming buffer layer of about 6 to 15 mm has a drawback that the surface becomes soft and is easily dented. As a typical conventional wooden floor finishing material, the thickness of the wooden layer is 7 mm, the thickness of the buffer layer (low-foamed polyethylene foam) is 8 mm, and the overall thickness is 15 mm (static spring constant is 70 kg / cm・ It was cm ² ) and it was directly attached to a concrete slab, and its light-weight floor impact sound insulation performance was measured. As a result, as shown in the graph 100 in Fig. 6, the sound insulation grade L-6
Became 5.

Therefore, it is an object of the present invention to provide a floor finish material that improves floor impact sound insulation and prevents the floor surface from becoming soft and easily dented, thus reducing the overall thickness as much as possible.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention includes a surface finishing material made of a relatively hard material such as a wood-based or synthetic resin-based material and a buffer layer in contact with the floor base, and the thickness of the surface finishing material is 6 mm.
Formed below one in which the thickness of the buffer layer was formed to have a 25kg / cm · cm ² or less static spring constant with respect to the local load of 100 cm ² and forming a 1 to 4 mm.

[Action]

When the floor finishing material of the present invention is laid so that the buffer layer is in contact with the floor base, when a floor impact sound is applied to the surface finishing material,
Demonstrated sufficient blocking performance without impairing the feeling of walking. Also, with this floor finishing material, it is possible to reduce the total thickness to 10 mm or less, so that it is possible to reattach a floor that has already been finished with a carpet or the like.

〔Example〕

Preferred embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a preferred embodiment of the present invention,
A cushioning layer 2 that comes into contact with a floor base 10 (concrete slab) is attached to a wood-based surface finishing material 1 such as plywood. As the buffer layer 2, rubber sponge, porous inorganic fiber, low-foam / low-loss polyethylene foam, polyurethane foam or the like is used. And this buffer layer 2 has a thickness of 1 to 4 m.
It has a static spring constant of 25 kg / cm · cm ² or less for a local load of 100 cm ² at m. The surface finishing material 1 in this embodiment is constituted by attaching a base plate plywood 1B to the back surface of a wood finishing veneer 1A.

For example, the floor covering pasted surface finish 1 on the buffer layer 2, with respect to the local load of 100 cm ^2, a buffer layer 2 having a thickness of 4mm is ^{80kg / cm · cm 2 50kg /} cm · cm 2 30kg / cm・ Cm ² 20
As a result of using four kinds having static spring constants of kg / cm · cm ² , the sound insulation performance of the floor having the buffer layer 2 exceeds L-70, and the sinking amount of the floor is 0.5 mm. Over L-60, 1.3 mm, L-57, 2.2 mm, L-55 less,
It was 2.9 mm. Form the buffer layer 2 to a thickness of 1 to 4 mm.
It is effective to improve the sound insulation performance with respect to local loads of 0 cm ² to 25kg / cm · cm ² or less static spring constant.

In the cross-sectional view shown in FIG. 2, the surface finishing material 1 (wood finishing veneer 1A and base plate 1B) has a thickness T ₁ of 6 mm or less,
The thickness T ₂ of the buffer layer 2 is preferably 1 to 2.5 to 4.5 mm.
It is formed to ~ 4 mm. Setting the thickness T ₂ to ₁ to 4 mm means
Although the sound insulation performance is improved as the static spring constant is made smaller, the floor sinking amount is also increased accordingly. Therefore, the thickness T ₂ of the buffer layer ₂ is set to ₁ to 4 mm, and the thickness T ₂ or more sinks. This is to prevent it from being included.

As the surface finish material 1, a relatively hard material such as a synthetic resin material may be selected in addition to the wood material. The advantage of using a wood-based material as the surface finish material 1 is that it has low thermal conductivity and good heat retention, has a relatively high surface hardness and is strong against static load, and has appropriate elasticity after lamination. It has a natural feel and is not a hotbed for house mites, and is easy to clean.

In addition, the above-mentioned static spring constant is not necessarily constant depending on the material, but varies depending on the hardness, foaming ratio, density, etc. of the material used, and also depends on the thickness, shape, etc. Therefore, in the present invention, depending on the type of material used for the buffer layer 2, etc., within a thickness range of 1 to 4 mm,
"The static spring constant for a local load of 100 cm ² is 25 kg / cm ・ c
m ² or less ”. For example, with a certain material, the static spring constant can be obtained with a thickness of 2 mm,
Other materials may have a thickness of 3 mm.

Measurement of lightweight floor impact sound insulation performance is based on JIS A 1419.
As a buffer source, a 500 g steel hammer was dropped from a height of 5 cm onto the surface finishing material 1 for measurement. Since the impact force of light-weight floor impact noise is small, the buffer layer 2 has a thickness of 1
It is sufficient that the static spring constant is ~ 4 mm and the static spring constant is 25 kg / cm · cm ² or less.

As the surface finish 1 becomes thicker than 6 mm, the flexural rigidity (Young's modulus of bending) becomes large, the deflection of the surface finish 1 due to the impact applied to the floor becomes small, and the resilience becomes high. As a result, the cushioning property and shock absorbing property of the lower buffer layer 2 are deteriorated, and the sound insulation performance is deteriorated. Therefore, by setting the thickness of the surface finish material 1 to 6 mm or less,
By appropriately deforming (deflecting) the surface finish material 1 when a shock is applied to the floor, the effect of the lower buffer layer 2 is sufficiently exerted.

As the floor base 10, it is possible to lay the floor finishing material of the present invention on a conventional large-structured large draw joist type in addition to the concrete slab, and other various floor finishing structures.

In the graph shown in FIG. 3, the result of measuring the light-weight floor impact sound insulation performance of the conventional product is indicated by reference numeral 100 as described above, and the insulation performance measurement result of the product of the present invention is represented by the reference character.
It is shown in 20. The embodiment of the present invention shown by reference numeral 20 has a wood layer having a thickness of 2.8 mm, a buffer layer having a thickness of 2 mm, and an overall thickness of 4.8 mm, and is directly attached to a concrete slab.

In the measurement results shown in FIG. 3, the conventional product was L-65, and the product of the present invention was L-55. The sound insulation class was 2 ranks, and the noise was about half of the auditory sense.

〔effect〕

As described above, according to the present invention, the surface finishing material and the buffer layer in contact with the floor base are provided, and the thickness of the surface finishing material is formed to 2 to 6 mm, and the thickness of the buffer layer is formed to 1 to 4 mm. In addition, since it is formed to have a static spring constant of 25 kg / cm ・ cm ² or less for a local load of 100 cm ² , it is possible to commercialize the floor finishing material with a total thickness of 10 mm or less, so it is already finished with a carpet or the like. It is possible to reattach (repair) the existing floor. In addition, the lightweight floor impact sound insulation performance is also excellent without impairing the feeling of walking. In this invention, the thickness of each of the surface finish material and the buffer layer is optimized, and the static spring constant of the buffer layer is set to the above value to improve sound insulation performance and prevent sinking. Is.

[Brief description of drawings]

FIG. 1 is a perspective view showing a preferred embodiment of the present invention, FIG. 2 is a cross-sectional view of the first embodiment, and FIG. 3 is a lightweight floor impact sound insulation performance between a conventional product and a product of the present invention. It is a graph which shows the result. 1 ... Surface finishing material, 2 ... Buffer layer.

Claims (1)

[Claims] 1. A floor finish material to be laid on a floor base material, comprising a surface finish material made of a relatively hard material such as wood-based or synthetic resin-based material, and a buffer layer in contact with the floor base material. forming a thickness 6mm below the thickness of the buffer layer to the local load of 100 cm ² and forming a 1 to 4 mm, and characterized by being formed with a 25kg / cm · cm ² or less static spring constant Floor finishing material.