JP4213920B2 - Floor cushion and floor structure using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floor cushion disposed between a finishing material and a floor base, and a floor structure using the same, and can be suitably used particularly for a directly pasted floor such as a school classroom or a welfare facility. Is.
[0002]
[Prior art]
For the floor structure in a school building or the like, for example, a directly attached floor in which a finishing material such as a wood system is applied to a concrete floor base via an adhesive is used. Usually, a cushioning body made of foam or the like is bonded to the bottom of the finishing material so as to follow the unevenness of the concrete floor base.
[0003]
[Problems to be solved by the invention]
Here, if the foam-made cushion is too thin, not only the followability to non-landing is deteriorated, but also the risk of absorbing shock when a child falls is increased, and thus the danger increases. In addition, problems such as footsteps transmitted downstairs and poor walking feeling also occur.
[0004]
On the other hand, if the buffer is too thick, there is a problem that warping occurs due to the influence of moisture in the case of a wood-based finishing material. Moreover, even if it is finishing materials other than a wooden type | system | group, problems, such as generation | occurrence | production of a crack, will arise.
[0005]
Accordingly, the present invention aims to satisfy such conflicting demands, absorbs and reduces the impact at the time of falling, and avoids problems such as warping of the wood-based material against moisture, and a floor buffer for the same. The object is to provide the floor structure used.
[0006]
[Means for Solving the Problems]
The present invention has been made in order to solve the above problems, and the first gist thereof is a floor cushion disposed between a finishing material and a floor base, and a plurality of convex portions. It is made of an elastic body having a plurality of recesses, and a protrusion of an elastic body having a mountain shape in cross section is formed inside the recess, and a space is formed below the protrusion (1). When the load is applied from the upper side of 1), the convex portion (1) compresses and deforms and the floor cushioning body undergoes buckling deformation .
[0008]
In addition, the height of the protrusion is preferably lower than the height of the convex portion around the protrusion, and the spring characteristics of the protrusion preferably have non-linearity. Moreover, it is preferable that the projection is set to be harder than the convex portion .
[0009]
Next, the second gist of the present invention is a floor structure using the above-described floor cushion, in which a finishing material is disposed on the upper side of the convex portion of the floor cushion, The present invention relates to a floor structure in which a floor base is disposed below the recess.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The floor cushion according to the present invention is disposed between the finishing material and the floor base. Here, from the viewpoint of ease of use and safety, the wooden flooring material that has been subjected to actual processing on the four circumferences is suitable as the finishing material, but it is not limited to this, and the ceramic industry such as tiles and stones System finishes can also be used. In addition, thin decorative wood, soft resin on substrates such as plywood, MDF (medium fiberboard), HDF (hard fiberboard), OSB (oriented strand board), LVL (single board laminate), resin board, etc. It is also possible to use a composite of sheet finishing material, ceramic finishing material, etc. by bonding.
[0011]
The thickness of the finishing material varies depending on the material, dimensions, etc., but 6 to 18 mm is appropriate. If it is thinner than 6 mm, there is a problem in strength, and if it exceeds 18 mm, the flexibility is impaired and the feeling of walking deteriorates.
[0012]
The floor cushion of the present invention has a plurality of convex portions and a plurality of concave portions made of an elastic body, and an elastic projection is formed inside the concave portion. That is, a shock absorber body having a plurality of convex portions and a plurality of concave portions in order to achieve the conflicting demands of avoiding problems such as warping of the wood-based material against moisture while absorbing and mitigating the impact at the time of falling. In addition, an elastic protrusion is used in combination.
[0013]
This point will be described in more detail. The floor cushion is provided below the finishing material and is fixed on the floor base. Therefore, a plurality of convex portions and a plurality of concave portions are mainly used so as to follow the unevenness of the concrete floor base and so that the finishing material is firmly supported on the floor base and the warping of the finishing material is prevented. On the other hand, in order to alleviate the impact at the time of falling, etc., a projection having elasticity corresponding thereto is used together.
[0014]
Here, natural rubber (NR), synthetic rubber (SBR), EPDM, resin, foam and the like can be used as the material of the buffer, but rubber elastic bodies are used in terms of ease of setting spring characteristics. Is preferred. Moreover, the convex part, the concave part, and the projection can be made of the same material or different materials, and can be integrally molded or can be joined after being separately molded. It is preferable to perform integral molding. Furthermore, it is not necessary to form protrusions in all of the plurality of recesses, and the number can be increased or decreased as necessary.
[0015]
In addition, it is preferable that a space is formed below the convex portion so that the convex portion undergoes compressive deformation and buckling deformation when a load is applied from above the convex portion. By making the underside of the convex part a space, the convex part can be made into a soft spring characteristic, and not only the compressive deformation but also the buffering effect by buckling deformation can be obtained against the load. is there.
[0016]
Furthermore, it is preferable that the height of the protrusion is lower than the height of the surrounding convex portion. In this way, when the buffer is interposed between the finishing material and the floor base, the protrusions do not contact in a state where no load is applied. On the other hand, when a load is applied, the plurality of convex portions are deformed first, and then the projection is deformed, and the load is received in two stages. Then, by appropriately setting and combining the spring characteristics of the protrusions and protrusions, it becomes possible to exhibit particularly effective shock absorption and relaxation action against falling of children in school classrooms and welfare facilities etc. is there.
[0017]
Specifically, when mainly considering impact absorption and relaxation during a fall, for example, a space is formed below the convex portion of the elastic body to make the convex portion relatively soft and the elastic projection to be relatively hard Set. As a result, the reaction force is initially small with respect to the distortion, and the reaction force increases with an increase in the distortion, so that it becomes an effective cushion when the children fall.
[0018]
In particular, it is more effective if the spring characteristics of the protrusions are made non-linear and gradually hardened, and when a load is applied from the upper side of the convex part by combining with a convex part that compresses and buckles. Thus, an ideal reaction force-strain curve can be obtained in which the reaction force smoothly increases as the strain increases. Note that the non-linearity of the spring characteristics of the protrusion can be easily realized by making the cross-sectional shape of the protrusion into a mountain shape, for example.
[0019]
By the way, although the maximum height of the buffer body for floors of the present invention varies depending on the material, required characteristics, and the like, 2 to 30 mm is appropriate, and 4 to 15 mm is particularly preferable. If the thickness is less than 2 mm, the function based on the spring characteristics of the buffer cannot be sufficiently exhibited, and if the thickness exceeds 30 mm, improvement of the function cannot be expected, and economic efficiency and workability are deteriorated.
[0020]
Moreover, when making the height of a protrusion lower than the height of the convex part of the periphery, it is suitable that the height of a protrusion shall be 35 to 85% of the height of a convex part, and 60 to 70% is especially preferable. . This is because if the ratio is lower than 35%, the action of the projection is too slow for the convex portion, and the meaning of forming the projection is lost, and if it is higher than 85%, the convex portion is deformed first, and then the projection is deformed. This is because the effect of receiving a load at a stage is weakened.
[0021]
Note that this does not mean that the height of the protrusion must be lower than that of the protrusion. Both may be the same height, or conversely, the protrusions may be high, and the height is set according to the required characteristics of the floor. However, only when the protrusion is made lower than the convex portion, 35 to 85% is only appropriate.
[0022]
The floor cushion of the present invention constitutes a floor structure by being interposed between the finishing material and the floor base. As the floor structure, the finishing material is disposed above the convex portion of the floor cushion. Even if the floor base is placed below the recess, the floor base is placed on the upper side of the convex part (fixed to the floor base with the convex part facing down), and the finishing material is placed below the concave part. May be disposed (the finishing material is fixed on the concave portion in the reverse direction). That is, the floor cushion has no front and back surfaces, and both have exactly the same effects.
[0023]
The floor structure of the present invention is most effective when applied to a straight floor in which a finishing material is spread directly on a concrete floor foundation, but is not limited to a straight floor. That is, the present invention can also be applied to a so-called double floor to which support legs are attached.
[0024]
【Example】
Hereinafter, specific examples of preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a top view and a side view showing a first embodiment of a floor cushion according to the present invention. The floor cushion of the first embodiment shown in FIG. 1 is a rectangle having a width (left and right direction in FIG. 1) of 142.5 mm and a length (up and down direction in FIG. 1) of 900 mm, and the entire rubber hardness is 60 °. Made of natural rubber (NR).
[0025]
And the convex part 1 and the recessed part 2 are formed alternately in the length direction, and the space is formed under the convex part 1. FIG. In addition, a protrusion 3 having a mountain shape in cross section is integrally formed with each recess 2 in each recess 2. The width of the convex portion 1 is 17.5 mm and the height is 8 mm. Further, the thickness of the convex portion 1 is 1 mm due to the space below the convex portion 1. On the other hand, the width of the bottom of the recess 2 is 5 mm, and a protrusion 3 having a height of 5 mm is formed from the entire bottom of the recess 2. Accordingly, the height of the protrusion 3 is 3 mm lower than the height of the convex portion 1.
[0026]
FIG. 2 is a side view showing a floor structure using the floor cushion of the first embodiment shown in FIG. That is, the structure is a directly-tensioned floor in which the wooden finishing material 10 is directly fixed to the lower side of the floor cushion in FIG. 1 and the upper side in FIG. 1 is directly fixed to the floor base 20 (concrete floor base). Yes. In addition, the floor structure shown in FIG. 2 constitutes a floor of a school classroom, a welfare facility, or the like by abutting against another floor structure (not shown).
[0027]
The floor structure shown in FIG. 2 follows the unevenness of the concrete floor substrate 20, prevents deformation of the wooden finishing material 10 due to moisture absorption, etc., and is safe and comfortable when a child falls. A comfortable walking feeling is ensured, and it is particularly suitable as a structure of a directly pasted floor such as a school classroom or a welfare facility.
[0028]
That is, since only the downward convex part 1 is fixed to the floor base 20, when it sees from the whole buffer body for floors, it contacts the floor base 20 partially. Therefore, even if the floor foundation 20 is uneven, it is absorbed by the non-contact portion between the convex portions 1 and the deformation of the convex portions 1. Further, since the plurality of convex portions 1 and the plurality of concave portions 2 alternately bridge the finishing material 10 and the floor base 20, the finishing material 10 is firmly supported by the floor base 20 and the warping of the finishing material 10 is caused. Is prevented.
[0029]
Next, a case where an impact load due to a fall of a child acts on the finishing material 10 will be described. In this case, only the convex portion 1 is first compressed and buckled. In this initial stage, the reaction force against the distortion is small, so that the cushion is effective. If the strain further increases, this time, as a second stage shock absorbing action, the protrusion 3 comes into contact with the floor base 20 and compresses and deforms, and the reaction force increases. Moreover, since the protrusion 3 has a mountain shape in cross section, the spring characteristics are non-linear. Therefore, when a load is applied, an ideal reaction force-distortion curve in which the reaction force smoothly increases as strain increases is obtained, and safety and a comfortable walking feeling are ensured.
[0030]
FIG. 3 is a diagram showing a reaction force-strain curve in the floor cushion according to the first embodiment. As shown in FIG. 3, the reaction force-distortion curve has two stages, a curved portion based on the convex portion 1 and a curved portion based on the protrusion 3, and both curves are smoothly connected. If the deformation of the projections 1 and the protrusions 3 reaches the limit, an increase in the reaction force can no longer be expected.
[0031]
FIG. 4 is a top view and a side view showing a second embodiment of the floor cushion according to the present invention. The floor cushion of the second embodiment is obtained by arranging the recesses 2 in an island shape with respect to the first embodiment. The protrusion 3 has a conical shape, and its tip has a hemispherical shape with a radius of 2.5 mm. Thus, by appropriately combining the shapes of the convex portion 1, the concave portion 2, the protrusion 3, etc., it is possible to cope with a floor having various required characteristics.
[0032]
【The invention's effect】
In the floor cushion and the floor structure using the floor cushion according to the present invention, the floor cushion is composed of an elastic body having a plurality of convex portions and a plurality of concave portions, and an elastic protrusion is formed inside the concave portion. Because it has excellent shock absorption and relaxation performance, it is highly safe, has an appropriate walking feeling, and deformation such as warping of the finishing material is prevented. Can be used particularly preferably.
[Brief description of the drawings]
FIG. 1 is a top view and a side view showing a first embodiment of a floor cushion according to the present invention.
FIG. 2 is a side view showing a floor structure using the floor cushion according to the first embodiment.
FIG. 3 is a diagram showing a reaction force-strain curve in the floor cushion according to the first embodiment.
FIG. 4 is a top view and a side view showing a second embodiment of the floor cushion according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Convex part 2 ... Concave part 3 ... Protrusion 10 ... Finishing material 20 ... Floor base

Claims (5)

A floor cushion disposed between the finishing material (10) and the floor base (20),
It consists of an elastic body having a plurality of convex portions (1) and a plurality of concave portions (2), and an elastic projection (3) having a mountain-shaped cross section is formed inside the concave portion (2).
Further, a space is formed below the convex portion (1), and when the load is applied from above the convex portion (1), the convex portion (1) is compressed and buckled. Floor cushion.   The floor cushion according to claim 1, wherein the height of the protrusion (3) is lower than the height of the convex portion (1) in the vicinity thereof.   The floor cushion according to claim 1 or 2, wherein the spring characteristic of the projection (3) has non-linearity.   The floor cushion according to any one of claims 1 to 3, wherein the protrusion (3) is set to be harder than the convex portion (1). It is a floor structure using the floor cushion according to any one of claims 1 to 4, wherein the finishing material (10) is arranged on the upper side of the convex portion (1) of the floor cushion, A floor structure, characterized in that a floor base (20) is disposed below a recess (2) of a floor cushion.

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