JP2620153B2 - Floorboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a soundproof floorboard used by being directly attached to concrete.

<Prior Art> Conventionally, as this type of soundproof floorboard, various types of soundproof floorboards having an elastic cushioning material such as a foam adhered to the back surface have been proposed.

In addition, as a thing using a fibrous sheet in place of the foam, for example, a medium hard fiberboard made of a fibrous material or a soft plate made of pulp is laminated on the lower surface of a wooden floor material,
Further, there has been proposed a soundproof flooring material in which a fibrous sheet-like material in which vegetable fibers are formed in a non-oriented manner with a binder is laminated on the lower surface thereof (Japanese Utility Model Laid-Open No. 63-76150).

<Problems to be Solved by the Invention> However, generally, the soundproofing performance of soundproofing flooring material using a foam is limited to a soundproofing class of L-50 (based on a light weight impact test according to JIS A1418) and is not necessarily sufficient. Can not give. It is possible to further improve the soundproofing performance by increasing the expansion ratio of the foam used, but the rigidity of the floor material is reduced in proportion, and the resilience is deteriorated, so heavy objects such as pianos and refrigerators However, there is a problem in that sinking occurs due to a long-term load when is placed.

In the case where the fibrous sheet is attached to the back,
The fibers themselves one by one are those having rigidity, and at the same time any soundproofing performance by adjusting the basis weight of the sheet (m weight per ²⁾ is obtained, have a restoring force against long loads doing. However, when using this fibrous sheet to obtain a soundproof floorboard having a soundproofing performance of sound insulation class L-45 to L-40, it is very soft and greatly sinks due to the load accompanying walking. Therefore, there is a problem that the walking feeling is very poor and furniture on casters cannot be moved stably. Also,
Each time a sink occurs in the fibrous sheet according to the load, a bending stress is repeatedly applied to the wooden flooring material, so that cracks in the veneer, internal tearing or damage to the real part are likely to occur. The material had a problem in its durability such that it could not be used as a material.

Such sinking of the floorboard due to the load has been a problem similarly in the case where the above-described foam having a high expansion ratio is laminated on the back surface.

<Means for Solving the Problems> Accordingly, an object of the present invention is to provide a flooring having a novel configuration capable of solving the disadvantages of these conventional soundproof flooring materials.

That is, the flooring material according to the present invention is configured such that the front and back sides of the floorboard in which the front and back plates are laminated via the buffer sheet are respectively formed at the front and rear ends of the floor board in the longitudinal direction and the width direction, respectively. Formed at the edge of the other end of each floor, a concave groove corresponding to the shape of the convex protrusion is formed, and a moisture-proof layer is provided on the back surface of the floor substrate. An elastic fiber mat is laminated, and a sink preventing member having a leg portion shorter than the elastic fiber mat thickness is penetrated and fixed from the back surface of the moisture-proof layer toward the elastic fiber mat.

<Operation> The impact from the floor plate surface side is absorbed by the buffer sheet in the substrate, and the elastic buffer mat laminated on the back surface of the substrate absorbs solid vibration. The sink of the floor plate after the vibration absorption by the elastic buffer mat is performed is prevented by the sink preventing member embedded in the elastic buffer mat from the back surface side of the floor plate. Since the sinking prevention member is provided in non-contact with the floor substrate, the soundproof performance is not reduced.

<Example> In the example shown in FIG. 1, reference numeral 1 denotes a floor substrate, which is formed by laminating and bonding a front plate 2 and a back plate 3 via a buffer sheet 4.

Both the front plate 2 and the back plate 3 are arbitrarily selected from plywood, fiber board, particle board, laminated board, wood board and the like. A veneer veneer, decorative paper,
A decorative sheet-like material such as a synthetic resin sheet is stuck, or an optional makeup is applied by pattern printing or coloring.

The buffer sheet 4 is a sheet made of a material having an appropriate elasticity. Examples of such an elastic material include synthetic resin sheets such as vinyl chloride, polyethylene, polypropylene, acetate, vinylidene chloride, polystyrene, and acrylic, or foams thereof. Rubber, synthetic rubber or their foams are optionally used.

A convex protrusion 5 is formed at one end of the floor substrate 1 in the longitudinal direction and the width direction, and a concave groove 6 having a corresponding shape is formed at the other end of the floor substrate 1. The floorboard can be connected and connected in the longitudinal direction and the width direction through the fitting of the groove 5 and the concave groove 6, respectively. In the floorboard of the present invention, both the convex protrusions 5 and the concave grooves 6 have front and back surfaces constituted by a front plate 2 and a back plate 3, respectively.
Is included. With such a configuration, the convex protrusion 5 and the concave groove can be closely fitted to each other through the buffering action of the buffer sheet 4.

On the back surface of the floor substrate 1, an elastic fiber mat 8 provided with a moisture-proof layer 7 on the back surface is laminated using an adhesive or a pressure-sensitive adhesive.

As the moisture-proof layer 7, a synthetic resin sheet of vinyl chloride, polyethylene, polypropylene, or the like, asphalt, asphalt felt, paper or nonwoven fabric impregnated with asphalt or a synthetic resin, or the like is optionally used.

Examples of the elastic fiber mat 8 include natural fibers such as coconut fiber, hemp, loofah fiber, and cotton; synthetic resin fibers such as vinyl chloride, polyethylene, polypropylene, polyester, polyacetal, and nylon; and inorganic fibers such as rock wool, glass wool, and mineral wool. Is bonded in a mat shape using a binder such as synthetic resin, synthetic rubber, raw rubber, latex, or the like.

The thickness of the elastic fiber mat 8 is preferably in the range of 3 to 30 mm. If it is less than 3 mm, the soundproofing performance will decrease,
If it exceeds 0 mm, the workability as a floor panel will deteriorate.

The elastic fiber mat 8 has a basis weight (amount of fiber per m ² ) of 20.
It is preferably about 0 to 3000 g / m ² . If it is less than 200 g / m ² , it will be too soft, while if it exceeds 3000 g / m ² , it will be too hard, and in any case, the soundproofness will be reduced.

It is preferable to apply a synthetic resin, synthetic rubber, raw rubber, latex, or the like to the edge of the four-turned wood of the elastic fiber mat 8 so as to enhance the adhesion between the fibers. Thereby, the elastic fiber mat 8
Can be prevented from delamination.

An anti-sinking member 9 is embedded in the elastic fiber mat 8 from the back surface of the moisture-proof layer 7, and prevents the floor board from sinking after the elastic fiber mat 8 absorbs an impact from the floor panel surface side.

The anti-sinking member 9 has a leg portion shorter than the thickness of the elastic fiber mat 8, and its tip is stopped in the elastic fiber mat 8 and does not reach the back surface of the substrate 1. Therefore, the impact from the floorboard surface side is transmitted to and absorbed by the elastic fiber mat 8, and the sinking preventing member 9 does not receive the impact. Absent. Sink prevention member 9
If the legs are provided in a state of being in contact with or penetrating the back surface of the substrate 1, the impact from the floor plate surface side is directly received by the sinking prevention member 9 and transmitted to the back surface side.
The soundproofing performance will be significantly reduced. Further, even if the length of the leg of the anti-sinking member 9 is slightly shorter than the thickness of the elastic fiber mat, the tip of the leg of the anti-sinking member 9 may be attached to the substrate before the elastic fiber mat 8 sufficiently absorbs the impact. Contact with the back surface causes the same problem as described above.

Therefore, the length of the leg of the anti-sinking member 9 is important, and is generally in the range of 50 to 90% of the thickness of the elastic fiber mat, and the gap between the back surface of the substrate 1 and the normal state is 2 to 10 mm. Is preferred. If the gap is less than 2 mm, as described above, before the impact is sufficiently absorbed by the elastic fiber mat 8, the anti-sinking member 9 comes into contact with the back surface of the substrate, and the soundproofing effect is reduced. In the case of providing, the effect of preventing the sinking of the floorboard cannot be sufficiently exhibited, and the walking feeling is deteriorated.

The anti-sinking member 9 can be of various shapes, and the cross section of the leg is inverted T-shaped (FIG. 3 (a)), L
It is formed so as to have a character shape (FIG. (B)), a trapezoidal shape (FIG. (C)) or an inverted trapezoidal shape (FIG. (D)), or a columnar shape (FIG. (E)) or a prismatic shape (FIG. It is formed as having the legs shown in FIG. FIG. 1 shows FIG. 3 (a)
Is shown in the shape of a leg having an inverted T-shaped cross section.

A plurality of such anti-sinking members 9 are used in a position parallel to the convex protrusion 5 or the concave groove 6 formed at the edge of one side in the longitudinal direction and the width direction of the substrate 1 in parallel with them. Can be A plurality may be fixed on a plurality of parallel lines, respectively. In addition, the one having a leg cross-sectional shape as shown in FIGS. 3 (a) to 3 (d) is lengthened to a length which is the same as or slightly shorter than the length or width direction of the floorboard. One or more rows of anti-sinking members can be buried in parallel in the vicinity of the convex protrusions 5 or the concave grooves 6.

The anti-sinking member 9 can be fixed not only at the position near the convex protrusion 5 or the concave groove 6 but also at an arbitrary position on the back surface of the floorboard, but by fixing this near the convex protrusion 5 or the concave groove 6. In particular, sinking is prevented at the floor plate connecting portion, and damage due to sinking of the convex protrusion 5 or the concave groove 6 in the fitted state is prevented.

In the embodiment shown in FIG. 2, a plurality of grooves 10 penetrating through the substrate 4 are formed in the floor plate having the same structure, and the substrate 1 is formed in the width direction. This groove 10 preferably has a width of 1 to 5 mm. If the width is less than 1 mm, it is too narrow to follow the unevenness of the concrete floor, and if the width is more than 5 mm, the strength of the floor panel is reduced.

An elastic fiber mat 8 having the same moisture-proof layer 7 as the floor plate of FIG.
Numeral 10 acts as a sound-absorbing space, and absorbs the vibration noise caused by the solid vibration caused by the impact from the floor panel surface side. A vertical groove extending in the longitudinal direction of the floor board perpendicular to the groove 10 can be formed so as to penetrate the back plate 4. As a result, the sound absorbing effect is enhanced, and the ability of the concrete floor surface to follow irregularities is further improved.

The present invention can take various modifications other than the illustrated embodiment. For example, the substrate 1 is replaced with a three-layer structure of a front plate, a buffer sheet, and a back plate.
With the five-layer structure of the lower buffer sheet and the back plate, it is possible to increase the rigidity of the floor plate and to achieve a composite shock absorbing effect of the two-layer buffer sheet. In this case, the convex protrusions and the concave grooves are formed such that the front and back surfaces are respectively constituted by a middle plate and a back plate, including the lower buffer sheet.
In particular, the substrate having the five-layer structure is preferable because the minimum rigidity required as a floor plate can be ensured even when a groove penetrating the back plate is formed as shown in FIG. Further, instead of the elastic fiber mat 8 laminated on the back surface of the substrate 1, a synthetic resin foam having a high expansion ratio can be used.

<Effect of the Invention> According to the floorboard of the present invention, excellent soundproofing performance can be exhibited, and at the same time, the sinking of the floorboard, which has been a problem in the past, can be prevented. It is possible to solve the problems such as breakage of the fitting portion.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing the configuration of a floor panel according to one embodiment of the present invention, FIG. 2 is a cross-sectional view showing the configuration of a floor panel according to another embodiment, and FIGS. It is a perspective view which illustrates the shape of the sinking prevention member used for a floorboard. DESCRIPTION OF SYMBOLS 1... Substrate, 2... Front plate, 3... Back plate, 4... Buffer sheet 5... Convex protrusion, 6... Concave groove, 7.
Elastic fiber mat, 9: anti-sinking member, 10: groove

Claims (2)

(57) [Claims] 1. A floor board having a front board and a back board laminated via a buffer sheet, each having a front end and a back end formed by the front board and the back board, respectively, at one edge in a longitudinal direction and a width direction of the floor board. An elastic fiber mat comprising a plurality of protrusions, a recessed groove having a shape corresponding to the protrusions formed at each end of the other end, and a moisture-proof layer provided on the back surface of the floor substrate. A floor plate, wherein a sink preventing member having a leg portion shorter than the thickness of the elastic fiber mat is penetrated and fixed from the back surface of the moisture-proof layer toward the elastic fiber mat. 2. The floor plate according to claim 1, wherein said sink preventing member is fixed at a position close to a convex protrusion and / or a concave groove formed on said substrate.