JPH0612121Y2 - Underfloor cushioning material - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of an underfloor cushioning material that reduces the transmission of floor impact sound on the upper floor to the downstairs, and particularly to the floor base surface. The present invention relates to an underfloor cushioning material that prevents the floor surface from sinking when a heavy object such as a piano is placed without impairing its conformability to the floor.

(Prior art and its problems) Conventionally, in order to reduce the transmission of floor impact sound on the upper floor to the downstairs, a cushioning material such as glass wool mat or the like is placed on the floor base such as a floor assembly or a concrete floor slab. A floor panel is placed with an intervening space, and a floating floor structure is applied with a floor finish such as wood flooring and carpet on it. From the standpoint of absorbency and uneven absorbency of the floor base, fiber-like cushioning materials such as glass wool mats and rock wool mats are often used. However, since the above-mentioned fibrous cushioning material is soft, it is easily distorted due to the weight of the floor surface, and when a heavy material such as a piano is placed, the floor surface sinks and there is a problem in that stability is lost.

On the other hand, as shown in FIG. 5, a cushioning material B which prevents the sinking of the floor surface by attaching an edge member 10 made of an elastic body such as rubber having less distortion to the side surface of the fibrous mat 11 with the same thickness is provided. Although it is proposed in Japanese Utility Model Publication No. 53-22448, this is because the relatively hard elastic body is provided on the side surface of the fibrous mat 11 with the same thickness in a frame shape. At some times, as shown in FIG. 6, the edge material 10 of the cushioning material B directly contacts the surface of the floor base material 13, and the side edge portion of the cushioning material becomes uneven due to unevenness. Mortar 12 on the surface of 13 more
It was necessary to accurately perform the background adjustment such as.

Furthermore, since the elastic edge member 10 such as rubber is always in contact with the floor base surface, even a small impact force can be transmitted to the floor base 13 via the elastic edge member 10 and the frame-shaped elastic edge Since the amount of compressive deformation due to the load is different between the material 10 and the fiber mat 11, there is a problem in that the feeling during walking differs and the feeling of walking varies.

(Problems to be Achieved by the Invention) The present invention solves the problems of the conventional and proposed underfloor cushioning materials, and completely impairs the uneven absorbability and shock absorbency of the fibrous mat. Instead, the compression deformation of the fibrous mat due to the placement of heavy objects is regulated, which eliminates the need to adjust the floor base during construction and keeps the floor surface above a certain level even when heavy objects such as pianos are placed. The purpose of the present invention is to provide a cushioning material for the underfloor that does not sink.

(Means for Achieving the Object) In order to achieve the above object, the present invention provides a plurality of through holes in an underfloor cushioning material made of a fibrous mat disposed between a floor base and a floor panel. The surface of the fibrous mat is covered with a sheet-like covering material, and an elastic leg made of rubber or the like having a height lower than the thickness of the mat inside the through hole of the fibrous mat is joined to the lower surface of the sheet covering material. The space is formed between the upper surface of the floor base and the lower surface of the elastic leg.

(Operation of the Invention) With the above structure, the underfloor cushioning material of the present invention is laid on the floor base material because the elastic legs are provided inside the fibrous mat at a height lower than the mat thickness. Sometimes
Only the lower surface of the fibrous mat comes into contact with the upper surface of the floor base, the flexibility of the fibrous mat is exerted as it is, and the large unevenness of the floor base is absorbed, so that the floor base need not be adjusted. When walking on the floor after finishing,
Since the elastic legs do not touch the surface of the floor base, a uniform walking feeling can be obtained by compressive deformation of only the fibrous mat. Also, when a heavy object such as a piano or furniture is placed and the fibrous mat undergoes large compressive strain, the elastic legs such as rubber inside the fibrous mat come into contact with the floor base to prevent further compressive strain. Thus, the sinking of the floor surface is regulated, and even heavy objects can be stably supported.

Furthermore, since the floor impact force on the floor is once absorbed by the compressive deformation of the fibrous mat, it is transmitted to the substrate by the contact between the elastic leg and the floor substrate, so that it is prevented from being transmitted directly from the elastic leg. It is something. In other words, until the elastic legs such as rubber come into contact with each other, the cushioning property of the fibrous mat acts uniformly to keep the walking feeling on the floor surface and the shock absorbing property constant.

In addition, since the elastic leg made of rubber or the like is provided inside the through hole of the fibrous mat by being joined to the sheet-like covering material, the fibrous mat may be bent or rolled during construction or handling. Even if it does not separate, it can be handled as a unit with the cushioning material.

(Embodiment) FIGS. 1 to 3 show an embodiment of the underfloor cushioning material A of the present invention, which is a glass wool mat, rock wool mat, polypropylene fiber mat, polyethylene having a thickness of 15 to 50 mm. A plurality of through holes 2 are provided in the central portion and near the corners of a fibrous mat 1 such as a fiber mat or a nylon fiber mat, and the upper surface of the fibrous mat 1 is a cover made of a sheet of a soft synthetic resin such as vinyl chloride resin. While being covered with the material 3, elastic legs 4 made of rubber or the like having a height h of about 40 to 80% of the thickness H of the fibrous mat are arranged inside the through holes 2 respectively, and the elastic legs 4 are provided. The top of the leg is
The lower surface of the covering material 3 is bonded and integrated by adhesion.

The range of the height h of the elastic legs 4 varies depending on the density of the fibrous mat 1 and the type of fiber, but the fiber density is 0.2
In the case of a low density of less than g / cm ³ , in the range of 40 to 60% from the thickness H of the fibrous mat in consideration of the reduction in the compressed thickness of the fibrous mat 1 due to the load of the floor panel and the floor finishing material. When the density of the fibrous mat 1 is relatively high (0.2 g / cm ³ ), the compression deformation is small, so that the height of the fibrous mat is preferably 60 to 80%. .

That is, when the floor mat is finished, the fibrous mat 1 absorbs the unevenness of the floor surface while reducing the thickness by 5 to 20% under the load of the floor panel and the floor finishing material. A space is formed between the upper surface of the floor base and the lower surface of the elastic legs so that the thickness of the mat and the height of the elastic legs are at least 20% or more so that they do not come into contact with each other. It is preferable to do so.

Specifically, since the total load of the floor panel and the floor finishing material is generally in the range of ²⁰ to 30 kg / m ^{2 in} the case of wood,
The height of the elastic leg is set so that the lower surface of the elastic leg is about 2 to 4 mm above the lower surface of the fibrous mat when a load of ²⁰ to 30 kg / m ² is applied to the fibrous mat. .

The minimum height of the elastic legs 4 is preferably at least 40% or more of the thickness of the fiber mat in order to ensure the stability of the floor surface when a heavy object such as a piano is placed. .

(Specific example) As a specific example, a 900 mm x 900 mm square and 19 mm thick polyethylene fiber mat (density 0.1 g / cm ³ ) is applied to the center and four corners.
A 45 x 45 mm square through hole is provided, the mat upper surface is covered with a soft PVC sheet, and a 40 mm square and 12 mm high trapezoidal rubber leg is placed in each through hole to make the upper surface of the leg soft. An underfloor cushioning material A was formed by integrally bonding with the lower surface of the PVC sheet.

As shown in FIG. 4, this cushioning material is laid on the concrete floor slab 13 whose groundwork is not adjusted, and the particle board 14 and the floor panel of the plywood 15 are placed on the slab. A plywood floorboard 16 was applied from above to construct the floor surface. As a result, the thickness of the fibrous mat 1 was reduced to 17 mm, the unevenness of the floor base 13 was absorbed, and the floor surface was constructed smoothly.

At this time, the rubber elastic legs 4 are located about 3 mm above the surface of the floor base 13, and any part of the surface of the plywood floor material 16 has a uniform walking feeling and shock absorption. Was there.

Furthermore, when a piano (250 kg) was placed on the floor surface, the floor surface was sunk by about 3.5 mm, but the floor surface did not sink further and was stable.

On the other hand, when the floor surface was constructed without providing the elastic legs, a maximum depression of 7 mm was measured at the piano installation part,
The stability was poor.

The underfloor cushioning material of the present invention may be used by arranging it on a wooden or steel floor base in addition to the concrete slab.

(Effect of the device) As described above, when the underfloor cushioning material of the present invention is laid on the floor base, only the lower surface of the fibrous mat is in contact with the upper surface of the floor base, so that the flexibility of the fibrous mat is improved. Is used as it is to absorb the large inferiority of the floor base and there is no need to adjust the floor base, and when the floor panel or floor finishing material is placed to perform the floor finish, the fiber mat Supports the above floor panels and floor finishing materials to absorb and mitigate the floor impact force on the floor and reduce the transmission of impact sound to the downstairs.In addition, a heavy object such as a piano is placed on the floor. Even if it is placed, there is no large sinking of the floor and a stable floor can be constructed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the underfloor cushioning material of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is an enlarged sectional view of an essential part of FIG. , FIG. 4 is an explanatory cross-sectional view showing a state in which a floor surface is formed by using the underfloor cushioning material of the above-described embodiment, and FIGS. 5 and 6 are perspective views and construction states showing a conventional cushioning material. FIG. (A) …… Underfloor cushioning material, (1) …… Fibrous mat (2) …… Through hole, (3) …… Coating material (4) …… Elastic leg

Claims (1)

[Scope of utility model registration request] 1. An underfloor cushioning material comprising a fibrous mat disposed between a floor base and a floor panel, wherein the surface of the fibrous mat having a plurality of through holes is covered with a sheet-like covering material. At the same time, an elastic leg made of rubber or the like having a height lower than the mat thickness is disposed inside the through hole of the fibrous mat so as to be bonded to the lower surface of the sheet covering material, and the upper surface of the floor base and the lower surface of the elastic leg are An underfloor cushioning material, characterized in that a space is formed between the undersides.