JP2001200629A - Floating floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floating floor structure allowing to be used even in a place having a high water containing possibility without the fear of deteriorating buffer performance and with little possibility of sinking the floor part due to creep deformation. SOLUTION: In this floating floor structure, a buffer body 1 is disposed on a floor slab S, the floor part F is disposed on the buffer body 1, and the load W of the floor part F is supported through the buffer body 1. In the structure, the buffer body 1 is formed by foamed body having a number of closed cells, a water resisting elastic body 3 having smaller creep deformation than the foamed body 1 is interposed between the floor slab S and the floor part F, and with the compressive deformation of the foamed body 1 due to load W from the floor part F, the elastic body 3 supports the load W.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method of disposing a buffer on a floor slab, and disposing a floor on the buffer.
The present invention relates to a floating floor structure configured to support the load of the floor via the buffer.

[0002]

2. Description of the Related Art In such floating floors, conventionally, glass wool or rock wool is generally used as a buffer interposed between a floor slab and a floor (for example, Japanese Patent Application Laid-Open No. HEI 3-100262). Gazette). Further, there is known one using foamed polyurethane as the buffer (see, for example, JP-A-57-112563).
It is also known that polystyrene foam is used as a buffer, and a vibration-proof rubber is disposed between the polystyrene foam and the floor (for example, see Japanese Patent Application Laid-Open No. 8-151780).

[0003]

However, it is known that when glass wool contains moisture, the buffering performance (vibration-proofing performance) is reduced, and this is shown in the table of FIG. In this table, the horizontal axis indicates the vibration frequency (Hz), the vertical axis indicates the transmission level (dB), A indicates the vibration damping performance of glass wool containing no water, and B indicates the vibration damping performance of glass wool containing water. The same phenomenon occurs with rock wool. As described above, glass wool and rock wool use a glass wool or rock wool as a buffer in places where there is a high possibility of containing water, such as a kitchen or a roof terrace, because the anti-vibration performance deteriorates significantly when containing water. Is inappropriate.

In order to solve such a problem, according to the above-mentioned Japanese Patent Application Laid-Open No. 3-100262, water-proof vibration-proof rubber is scattered between a floor slab and a floor, and the glass wool is vibration-proof by containing water. When the performance is deteriorated, the load from the floor is supported by the vibration-proof rubbers scattered, and the vibration-proof rubbers are designed to supplement the vibration-proof effect. However, it is wasteful to use glass wool in places where water content is likely to be high, and there is room for improvement in this respect.

On the other hand, Japanese Patent Laid-Open Publication No.
According to JP-A-63-63, foamed polyurethane having low water content is used as a buffer, so that it can be used without fear of deterioration in vibration isolation performance even in a location where water content is likely to be high. However, according to this publication, foamed polyurethane is laid on the entire surface of the floor slab, and the floor is brought into contact with the entire surface of the foamed polyurethane upper surface. As a result, there is a possibility that the floor will sink.

Further, according to the above-mentioned Japanese Patent Application Laid-Open No. 8-151780, since polystyrene foam having low water content is used as the buffer, the vibration damping performance is not deteriorated due to water content, but the foam between the polystyrene foam and the floor is not affected. Since a vibration isolating rubber is interposed between the vibration isolating rubber and the polystyrene foam, a plate body for dispersing a load is interposed between the vibration isolating rubber and the polystyrene foam in order to distribute the load acting on the polystyrene foam through the rubber isolating rubber. It is necessary, and even the one described in this publication cannot prevent sinking of the floor due to creep.

The present invention solves the above-mentioned problems of the prior art, and the object of the present invention is to reduce the possibility of buffer performance deterioration even in a location where water content is high,
Another object of the present invention is to provide a floating floor structure in which there is little possibility of floor subsidence due to creep deformation.

[0008]

According to a first aspect of the present invention, as shown in FIG. 1 and FIG. 2, a buffer 1 is provided on a floor slab S. 1 is a floating floor structure in which a floor F is disposed on the floor 1 so as to support the load W of the floor F via the buffer 1. A water-resistant elastic body 3 made of a foam having air bubbles and having a smaller creep deformation than the foam 1 is interposed between the floor slab S and the floor F. The elastic body 3 supports the load W with the compressive deformation of the foam 1 due to the load W.

A feature of the invention according to claim 2 is that, as illustrated in FIGS. 7 and 8, a buffer 1 is disposed on a floor slab S, and a floor F is disposed on the buffer 1. A floating floor structure configured to support the load W of the floor portion F via the buffer 1, wherein the buffer 1 is made of a foam having many closed cells. Along with the compressive deformation of the foam 1 due to the load W from the floor F, the load supporting area of the foam 1 supporting the load W increases.

A characteristic feature of the third aspect of the present invention is that, as illustrated in FIG. 7, a projecting portion 1a projecting upward is integrally formed on the upper surface of the foam 1 so as to reduce the compression deformation of the projecting portion 1a. Accordingly, the load supporting area gradually increases.

A characteristic feature of the invention according to claim 4 is that, as illustrated in FIG. 8, the foam 1 is constituted by a plurality of foams 1 having different heights and individually formed, and has the highest height. The load supporting area gradually increases with the compressive deformation of the foam 1 having a high thickness.

A characteristic feature of the invention according to claim 5 resides in that the foaming ratios of the foams 1 separately formed are different.

A feature of the invention according to claim 6 is that, as exemplified in FIG. 7, a water-resistant elastic body 3 having less creep deformation than the foam 1 is interposed between the floor slab S and the floor F. The elastic body 3 supports the load W with the compressive deformation of the foam 1 due to the load W from the floor F.

A feature of the invention according to claim 7 is that, as illustrated in FIGS.
And a gap t is provided between the elastic body 3 and the floor slab S or between the elastic body 1 and the floor F.

The feature of the invention according to claim 8 is that, as illustrated in FIGS. 2 and 9, the elastic body 3 is made of the foam 1
The contact area with the floor slab S or the contact area with the floor F is increased in accordance with the elastic deformation caused by the increase of the load W acting on the elastic body 3. In the shape of the increase.

A characteristic feature of the ninth aspect of the present invention is that the elastic body 3 is made of rubber as exemplified in FIGS. 2 and 7 and FIGS. 9 to 11.

A tenth aspect of the present invention is that the foam 1 is expanded polystyrene as shown in FIG.

A feature of the invention according to claim 11 is that, as illustrated in FIG. 3, the foam 1 is compressed by pressure after foaming and then restored.

As described above, the reference numerals are used for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

According to the first aspect of the present invention, the cushioning member for the floating floor is made of a foam having many closed cells, that is, a foam having a low water content. Therefore, even if used at a location where there is a high possibility of containing water, there is little danger of the buffer performance deteriorating due to containing water. Then, a water-resistant elastic body having a smaller creep deformation than the foam is interposed between the floor slab and the floor, and with the compressive deformation of the foam due to a load from the floor, the elastic body is Since the foam is configured to support a load, the elastic body may be deformed by compression, for example, due to an increase in load from the floor or by creep due to aging. Since the load is supported, further floor subsidence can be prevented.

According to the characteristic structure of the second aspect of the present invention, the buffer for the floating floor is made of a foam having a large number of closed cells. Since the load supporting area of the foam supporting the load is increased with the compressive deformation of the foam due to the load from the floor, the foam may be subjected to an increase in the load from the floor or aging. Even if the compression deformation occurs due to the creep, the floor subsidence can be suppressed by the dispersion of the load due to the increase in the load supporting area.

According to the characteristic feature of the third aspect of the invention, when the load supporting area is increased in accordance with the compressive deformation of the foam due to the load, the projecting portion projecting upward is integrally formed on the upper surface of the foam. With the configuration in which the load supporting area gradually increases with the compression deformation of the protrusion, the foam and the protrusion can be handled in an integrated state, and the foam laying operation can be performed. And the like can be easily performed, and the settlement of the floor can be gradually suppressed.

According to the characteristic structure of the fourth aspect of the present invention, when the load supporting area is increased with the compressive deformation of the foam due to the load, the foams have different heights and a plurality of separately formed foams are required. Constructed from foam, the load-bearing area increases stepwise with the compressive deformation of the tallest foam, so that the physical properties of each foam are different and the floor subsidence Versatility can be given to the suppression of flooring, and the settlement of the floor can be suppressed stepwise.

According to the characteristic structure of the fifth aspect of the present invention, the foams separately formed can have different expansion ratios, so that the foams can have different vibration proof performances and the like. Therefore, for example, a floating floor corresponding to the situation of the floor, such as a floor on which a relatively large load acts, or a floor on which a relatively small load acts but a person walks relatively frequently. Construction is possible.

According to a sixth aspect of the present invention, in the above-described second to fifth aspects, a water-resistant elastic body having less creep deformation than the foam is interposed between the floor slab and the floor. With the compressive deformation of the foam due to the load from the floor,
Because the elastic body is configured to support the load, when the foam is compressed and deformed by creep due to an increase in load from the floor or aging, the above-described suppression of floor subsidence due to an increase in the load support area described above. In addition, the elastic body prevents the settlement of the floor, so that the settlement of the floor can be more reliably prevented.

According to a characteristic feature of the invention of claim 7, the elastic body is disposed in a through hole formed in the foam, and the elastic body is provided between the elastic body and the floor slab or between the elastic body and the floor. Since there is a gap between the floor sections, for example, by setting the gap within the allowable range of the floor subsidence, while the floor subsidence due to the compression deformation of the foam is within the allowable range, the floor section by the elastic body is provided. The settlement can be prevented, and the settlement of the floor can be kept within an allowable range.

[0027] A feature of the invention according to claim 8 is that the elastic body is disposed in a through-hole formed in the foam, and the elastic body is elastically deformed by an increase in a load acting on the elastic body. Since the shape is such that the contact area with the slab or the contact area with the floor is increased, the load is supported with a larger contact area as the load acting on the elastic body increases. In other words, as the load increases, the load per unit area acting on the elastic body decreases, so it is possible to prevent the elastic body from being damaged by overload while maintaining the load support by the elastic body. it can.

According to a ninth aspect of the present invention, since the elastic body is made of rubber, the elastic body can be easily obtained and the cost can be reduced as compared with a case where a coil spring made of stainless steel is used. This is also advantageous.

According to a tenth aspect of the present invention, since the foam is expanded polystyrene, as shown in (c) of FIG. Its anti-vibration performance is almost the same as the anti-vibration effect of glass wool that has been widely used in the past, that is, glass wool that does not contain water.

According to a feature of the invention, the foam is compressed by pressure after foaming, and thereafter,
Since it has been restored, it is possible to provide the vibration damping performance as shown in FIG. 4 (C) and also to exhibit the vibration damping performance as shown in FIG. 6 by combining with an elastic body. it can.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a floating floor structure according to the present invention will be described with reference to the drawings. In this floating floor structure, as shown in FIG. 1, the buffer 1 is laid almost over the entire upper surface of the floor slab S, and the buffer 1 is also provided around the floor slab S as necessary. At the same time, a concrete floor F is provided over the entire upper surface of the buffer 1, and the floor F and a load W acting on the floor F from above are supported via the buffer 1. ing. The buffer 1 is made of a foam having an extremely small amount of water, for example, expanded polystyrene, having a large number of closed cells inside, and is formed in a compressed state after foaming. Specifically, after the foaming is completed, for example, as shown in FIG. 3 (A), a material having a thickness of 500 mm is compressed to 50 mm as shown in FIG. By releasing the pressing force, a material restored to a thickness of 300 mm is used as shown in FIG.

FIG. 4 is a table showing the results of experimental production of expanded polystyrene as such a foam and measurement of its physical properties. That is, the result of trial production of expanded polystyrene having the density and expansion ratio shown in FIG. 4 (a), cutting out a total of 36 samples, and measuring the compression performance, is as follows.
It is (b) of FIG. The measurement of the compression performance was performed according to JIS-A-9511. Also,
The result of measuring the vibration isolation performance is (c) in FIG. 4, and the natural frequency and the like at each load were measured while changing the load per unit area.

The foamed polystyrene 1 is provided with a plurality of through-holes 2 penetrating vertically at appropriate intervals. Each of the through-holes 2 has a water-resistant natural or synthetic rubber. The elastic body 3 is inserted and arranged. As shown in detail in FIG. 2, the rubber elastic body 3 has a height H substantially equal to the thickness T of the expanded polystyrene 1 in the vertical direction, and the lower part thereof has a smaller diameter as it goes down. It is constituted in the shape which becomes. Therefore, due to the increase in the load W from the floor F and the creep due to aging, the expanded polystyrene 1
Is compressed and deformed, the elastic body 3 initially in the state shown in FIG. 2A becomes the state shown in FIG. 2B to support a part of the load W from the floor F. The structure is such that the settlement of the floor portion F is prevented and the contact area with the floor slab S is gradually increased by the compressive deformation of the elastic body 3 itself accompanying the increase of the load W.

A prototype of such an elastic body was manufactured and its physical properties were measured. The results are shown in the table of FIG. The prototype elastic body was made of natural rubber and had a diameter of 60 mm.
mm, height 50mm, hardness 60 degrees (JIS-K-630
Using a 1-type A or C-type hardness tester), the load per one elastic body was changed, and the natural frequency at each load was measured.

Further, the combination structure of the buffer 1 and the elastic body 3, specifically, the above-mentioned foamed polystyrene is used as the buffer 1, and the above-mentioned natural rubber elastic body 3 is provided in the through hole 2. Was inserted and its natural frequency and the like were measured. The results are shown in the table of FIG.

In the construction of the floating floor, first, the expanded polystyrene 1 is laid on the floor slab S, and the elastic body 3 is inserted into the through hole 2. The veneer board 4 is placed thereon, and concrete is cast to form a floor F. The floor F
Need not be made of concrete, and the floor portion F can be formed by a floor plate or the like. In this case, it is not necessary to place the veneer plate 4 or the like on the expanded polystyrene 1. The floating floor constructed in this way is resistant to water, and even if water invades, there is almost no deterioration in the buffering performance due to the expanded polystyrene 1. The support of the load W by the body 3 prevents the sinking of the floor F.

[Another Embodiment] Next, another embodiment will be described with reference to FIGS. 7 to 13. In order to avoid redundant description, the same components and components having the same functions as those of the previous embodiment will be described. The description is omitted by attaching the same reference numerals as those in the previous embodiment, and only the configuration different from the previous embodiment will be mainly described.

(1) In the previous embodiment, the upper surface of the expanded polystyrene 1 was configured to be flat, but in another embodiment shown in FIG. 7, the upper surface of the expanded polystyrene 1 protrudes upward at appropriate intervals. A hemispherical projection 1a is integrally formed. Therefore, according to this embodiment, when the protrusion 1a made of expanded polystyrene is compressed and deformed by the load W from the floor F, the load supporting area of the expanded polystyrene supporting the load W gradually increases with the compression deformation. It is configured to increase.

A plurality of through-holes 2 are also formed in the expanded polystyrene 1 having such a protruding portion 1a, and each of the through-holes 2 has such a shape that the diameter decreases toward the top. The elastic body 3 made of rubber is inserted and arranged.
Each elastic body 3 has a height H smaller than the vertical thickness T of the expanded polystyrene 1 including the protruding portion 1a. Therefore, a gap t exists between each elastic body 3 and the floor F. Is formed. Accordingly, the elastic body 3 supports a part of the load W from the floor F with the compressive deformation of the protruding portion 1a, and the compressive deformation of the elastic body 3 itself with the increase of the load W causes the floor F The contact area is gradually increased.

However, in another embodiment shown in FIG. 7, the protruding portion 1a made of expanded polystyrene is compressed and deformed by the load W from the floor F, and the load supporting area of the expanded polystyrene supporting the load W gradually increases. Since it is possible to increase and suppress the settlement of the floor portion F, it is possible to eliminate the elastic body 3 and eliminate the through hole 2 in the configuration shown in FIG. May be provided on the lower surface of the expanded polystyrene 1, that is, on the floor slab S side.

For the same reason, as shown in FIG. 8, a plurality of foamed polystyrenes 1 having different heights and separately formed are laid on the floor slab S and compressed by the load W from the floor F. With the deformation, the load supporting area for supporting the load W is gradually increased from the highest expanded polystyrene 1 to the lowest expanded polystyrene 1 so that the floor portion F sinks. In this case, between the expanded polystyrenes 1 having different heights, for example, the expanded polystyrenes 1 having different expansion ratios may be used, and the expanded polystyrenes 1 may be formed with different physical properties.

In the structure shown in FIG. 8, a plurality of through-holes 2 are formed in the polystyrene 1 having the highest height. 3 or by inserting a plurality of through holes 2 in the expanded polystyrene 1 having the second highest height and inserting and placing the elastic body 3, and setting the height of the elastic body 3 secondly. Highest polystyrene 1 and second highest polystyrene 1, slightly lower than high polystyrene 1
As the elastic body 3 supports a part of the load W from the floor F with the compressive deformation of the elastic body 3, the contact area with the floor F is gradually increased by the compressive deformation of the elastic body 3 itself. It can also be configured.

(2) In the embodiments described above, the rubber elastic body 3 has a shape in which the diameter decreases as it goes downward, or
Although an example is shown in which the shape is such that the diameter becomes smaller toward the upper side, various changes are possible for the shape and the height H of the elastic body 3. For example, as shown in FIG. 9, the elastic body 3 is formed in a cocoon shape, the height H of which is substantially equal to the thickness T of the expanded polystyrene 1, and when the expanded polystyrene 1 is compressed and deformed, the compression of the elastic body 3 itself is performed. Due to the deformation, the contact area with the floor slab S and the contact area with the floor portion F may be configured to gradually increase.

As shown in FIG. 10, the elastic body 3 is formed in a cylindrical shape, and the height H thereof is made smaller than the thickness T of the expanded polystyrene 1 so that the space between the elastic body 3 and the floor F is formed. Gap t
Alternatively, as shown in FIG. 11, the elastic body 3 formed in a column shape is held by the plywood plate 4 to form a gap t between the elastic body 3 and the floor slab S. Can also be configured. According to the embodiment shown in FIGS. 10 and 11, when the expanded polystyrene 1 is compressed and deformed, the elastic body 3 comes into contact with the floor F or the floor slab S, and the elastic body 3 receives a load W from the floor F. Part will be supported.

(3) In the embodiments described above, rubber elastic bodies 3 having various shapes have been described, but the elastic bodies 3 may be made of a material other than rubber. For example, FIG.
As shown in the figure, the elastic body 3 is constituted by a coil spring made of water-resistant stainless steel, and the height H of the coil spring as the elastic body 3 is made smaller than the thickness T of the expanded polystyrene 1 so that the floor portion F A gap t can be formed between them. Further, as shown in FIG. 13, the elastic body 3 is constituted by a double coil spring made of stainless steel,
The height H of one of the double coil springs, for example, the height H of the inner coil spring 3a is made smaller than the thickness T of the expanded polystyrene 1 to form a gap t with the floor F, and the outer coil The height of the spring 3b may be substantially the same as the thickness T of the expanded polystyrene 1.

(4) In the above embodiments, an example was shown in which the through-holes 2 were formed in the expanded polystyrene 1 and various elastic bodies 3 were inserted and arranged.
It is also possible to form a hole with a bottom having a bottom at the bottom and insert and arrange various elastic bodies 3 in the hole with the bottom.
In addition, although the expanded polystyrene is shown as an example of the foam 1 having a large number of closed cells, the present invention is not limited to the expanded polystyrene, but may be replaced with a foam such as expanded polypropylene, expanded polyethylene, expanded polyurethane, or the like.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a floating floor structure.

FIG. 2 is a sectional view showing a main part of the floating floor structure.

FIG. 3 is an explanatory view showing a production process of a foam.

FIG. 4 is a table showing physical properties of a foam.

FIG. 5 is a chart showing physical properties of an elastic body.

FIG. 6 is a table showing physical properties of a combination structure of a foam and an elastic body.

FIG. 7 is a sectional view showing another embodiment of the floating floor structure.

FIG. 8 is a sectional view showing another embodiment of the floating floor structure.

FIG. 9 is a sectional view showing another embodiment of the floating floor structure.

FIG. 10 is a sectional view showing another embodiment of the floating floor structure.

FIG. 11 is a sectional view showing another embodiment of the floating floor structure.

FIG. 12 is a sectional view showing another embodiment of the floating floor structure.

FIG. 13 is a sectional view showing another embodiment of the floating floor structure.

FIG. 14 is a table showing characteristics of glass wool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foam as buffer 1a Projection 2 Through-hole 3 Elastic body F Floor S Floor slab t Clearance W Load

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshiro Matsumoto 4-1-1-13 Honcho, Chuo-ku, Osaka-shi, Osaka Inside the Osaka Main Store of Takenaka Corporation (72) Inventor Kunihiko Araki Honmachi-4, Chuo-ku, Osaka-shi, Osaka No. 1-113, Takenaka Corporation Osaka Main Store (72) Inventor Taki Nakai 4-1-1-13 Honmachi, Chuo-ku, Osaka-shi, Osaka Inside Takenaka Corporation Osaka Main Store (72) Inventor Chie Yasui Osaka 4-1-1-13, Honcho, Chuo-ku, Osaka-shi, Japan Takenaka Corporation Osaka Main Store (72) Inventor Tomio Komura 5-1-1 Torigai Nishi, Settsu-shi, Osaka Kanebuchi Chemical Industry Co., Ltd. Osaka Factory (72) Inventor Kozo Okamoto 10-133 Minami Hatsushima-cho, Amagasaki City, Hyogo

Claims (11)

[Claims] 1. A structure in which a buffer is provided on a floor slab, and a floor is provided on the buffer, and a load on the floor is supported via the buffer. A floating floor structure, wherein the buffer is made of a foam having a number of closed cells,
And, while interposing a water-resistant elastic body having a smaller creep deformation than the foam between the floor slab and the floor,
A floating floor structure in which the elastic body is configured to support the load with the compressive deformation of the foam due to the load from the floor. 2. A structure in which a buffer is provided on a floor slab, and a floor is provided on the buffer, and a load on the floor is supported via the buffer. A floating floor structure, wherein the buffer is made of a foam having a number of closed cells,
A floating floor structure configured to increase a load supporting area of the foam supporting the load with a compressive deformation of the foam due to a load from the floor. 3. An upwardly protruding projection is integrally formed on an upper surface of the foam so that the load supporting area gradually increases as the projection is compressed and deformed. The floating floor structure according to claim 2. 4. The foam body is composed of a plurality of foams having different heights and individually formed, and the load supporting area is stepped according to the compression deformation of the foam having the highest height. The floating floor structure according to claim 2, wherein the floating floor structure is configured to increase in number. 5. In the foam formed separately,
The floating floor structure according to claim 4, wherein the expansion ratio is different. 6. A water-resistant elastic body having a smaller creep deformation than the foam is interposed between the floor slab and the floor, and with a compressive deformation of the foam due to a load from the floor, The floating floor structure according to any one of claims 2 to 5, wherein the elastic body is configured to support the load. 7. The elastic body is disposed in a through hole formed in the foam, and a gap is provided between the elastic body and a floor slab or between the elastic body and a floor. The floating floor structure according to claim 1 or 6. 8. The contact area with the floor slab, with the elastic body being disposed in a through-hole formed in the foam and being elastically deformed due to an increase in a load acting on the elastic body. The floating floor structure according to any one of claims 1, 6, and 7, wherein the floating floor structure has a shape that increases a contact area with the floor. 9. The method according to claim 1, wherein the elastic body is rubber.
The floating floor structure according to any one of 5, 6, 7, and 8. 10. The floating floor structure according to claim 1, wherein the foam is expanded polystyrene. 11. The foam according to claim 1, wherein the foam is compressed by pressure after foaming and then restored.
0 The floating floor structure according to any one of 0.