JP2815167B2 - Floor structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a floor structure, and more particularly, to a floor structure of a polymerized house, a school, or the like, or a floor of a gymnasium or the like, and has a sound insulation effect of floor impact sound. For high floor structures.

(Prior art) Conventionally, as a floor structure, securing space for underfloor piping,
From the viewpoint of easy adjustment of floor level and simplicity of construction,
A floor structure as shown in FIG. 10, that is, a plurality of floor support members c having a height adjustable and having an elastic body b such as rubber at a lower end are dispersed on a floor base made of a concrete floor slab a or the like. There is known a floor structure in which a rigid floor panel member d is placed on the floor support member c, and a floor finishing material e is laid on the floor panel member d.

However, in this floor structure, when an impact force is applied on the floor finishing material e, the floor finishing material e and the floor panel material d vibrate, and an impact sound is emitted to the lower underfloor space, and this impact sound is generated under the floor. It spreads horizontally in space and spreads downstairs over a wide area. In addition, since the rigid floor panel material d is directly mounted on the floor support member c, when a weight impact force (a large impact force such as when a child jumps) is applied to the floor finish material e, the above-mentioned effect is obtained. Is transmitted to the concrete floor slab a via the floor panel material b and the floor support member c, causing the floor slab a to vibrate and easily transmitted as an impact sound downstairs.

For this reason, when the above-mentioned floor structure is applied to an upper floor of an apartment house, a school, or the like, or a floor of an upper gymnasium, there is a problem that the floor impact sound of the upper floor is largely propagated downstairs.

Therefore, as shown in FIG. 11, a glass wool adsorption felt 1 according to JIS-A-6906 is provided on the lower surface of the rigid floor panel material d.
A floor supporting member c on which a low-density and soft sound-absorbing material f such as 0K (density is 10 kg / m ³ ) is adhered, or a floor supporting member c is placed on a concrete floor slab a as shown in FIG. A floor structure has been proposed in which the sound absorbing material f is laid except for a portion where the floor support member c is disposed after being attached and stabilized.

(Problems to be Solved by the Invention) However, since each floor structure can reduce the impact sound that spreads into the underfloor space by the sound absorbing material f, the sound insulation performance against the light floor impact sound (the sound due to the impact of walking around) is slightly improved. Have been.

However, in each floor structure, since the floor panel member d is specially mounted on the floor supporting member c, the vibration of the floor panel member d is directly transmitted to the floor supporting member c against the weight impact force. Therefore, the floor slab a still vibrates, and it cannot be said that the floor slab a has a sufficient sound insulating effect against heavy floor impact sound.

In view of the above, the present invention is not only a lightweight floor impact sound,
An object of the present invention is to provide a floor structure having a high sound insulation effect even for heavy floor impact sounds.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an elastic mat having a predetermined elasticity and a sound absorbing property between a floor support member and a floor panel material. A predetermined portion of the lower surface of the elastic mat is exposed.

Specifically, the solution taken by the present invention is that a plurality of floor support members, whose height can be adjusted and which has an elastic body such as rubber at the lower end, are dispersed on a floor base made of a concrete floor slab or the like. On the floor support member, an elastic mat having a sound absorbing property having a static spring constant per unit area of 1 × 10 ⁶ to 8 × 10 ⁶ N / m ³ is provided at a portion of 70% or more of its lower surface. Is exposed and is placed substantially horizontally, a rigid floor panel material is laid on the elastic mat, and an appropriate upper surface member made of a discarded material or a floor finishing material is laid on the floor panel material. Configuration.

(Operation) With the above configuration, when a heavy floor impact force is applied on the floor finishing material, the elastic mat becomes 1 × 10 ⁶ to 8 × 10 ⁶ N / m ^3.
, The floor impact force can be effectively absorbed without causing a large sink in the floor surface, so that the impact force transmitted from the floor panel material to the floor support member is extremely small. .

Also, when a lightweight floor impact force is applied on the floor finishing material, the elastic mat has a sound absorbing property, so that the solid vibration sound generated in the floor panel material is absorbed from the upper surface side of the elastic mat, and Since 70% or more of the lower surface of the elastic mat is exposed, the impact sound emitted and diffused into the underfloor space is effectively absorbed from the lower surface side.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 to 3 show one embodiment of a floor structure according to the present invention. In this floor structure, a plurality of floor support members 2 are dispersedly arranged on a concrete floor slab 1 as a floor substrate, An elastic mat 3 having a sound absorbing property is placed substantially horizontally over the floor support members 2, and a floor panel 4 is laid on the elastic mat 3, and furthermore, the floor panel 4 Material 5 and floor finish material 6 as upper surface members
Is laid.

The floor support member 2 is attached to the concrete floor slab 1 by anchor bolts 7 at an attachment seat 21 on a ring located at the lower end thereof. Hardness 50 inside the mounting seat 21
A cylindrical elastic body 22 made of rubber is integrally formed, and the elastic body 22 holds a lower nut 23 at an upper portion thereof. The lower nut 23 is screwed with a lower portion of an adjustment bolt 24 having upper and lower portions having mutually opposite screws, and an upper portion of the adjustment bolt 24 is provided with the lower nut 23 and the reverse screw. The upper nut 25 is screwed into this upper nut
The upper surface of 25 holds a square plate-shaped support plate 26 having a central hole 26a.

The floor support member 2 is configured by the mounting seat 21, the elastic body 22, the lower nut 23, the adjustment bolt 24, the upper nut 25, and the support plate 26 described above. In this floor support member 2, the adjustment bolt 24 When rotated, the distance between the lower nut 23 and the upper nut 25 increases or decreases, so that the height can be adjusted. By adjusting the height of the floor support member 2, the elastic mat 3 and thus the floor can be adjusted. Finishing material 6
Level adjustment is possible.

The intervals at which the floor support members 2 are dispersed and arranged and the size of the support plate 26 are as follows.

That is, when the size of the floor panel member 4 is 900 mm × 900 mm, four floor support members 2 are arranged for one floor panel member 4, and the interval between the four floor support members 2 is In order to stabilize the floor panel material 4, it is preferably about 600 mm. The size of the support plate 26 is to reduce embedding in the elastic mat 3 and to reduce the sound absorption of the exposed surface of the lower surface of the elastic mat 3. In order to exhibit the property, it is preferably about 100 mm × 100 mm.

By doing so, the ratio of the area of the support plate 26 to the area of the floor panel material 4 becomes about 5%, and the elastic mat 3 supported below the floor panel material 4 has about 95% of the lower surface thereof. The part is exposed.

As described above, the elastic mat 3 has an area of 70
% Or more is preferably exposed. The reason is that, when an impact force is applied on the floor finishing material 6, the floor impact force causes the impact sound of the floor finishing material 6, the discarded material 5, and the floor panel material 4 in the space below the elastic mat 3 under the floor. It is released, and this impact sound is spread horizontally in the underfloor space,
When the lower surface of the elastic mat 3 is exposed to the underfloor space by 70% or more, the light floor impact sound diffused into the underfloor space is effectively absorbed from the lower surface side of the elastic mat.

The static spring constant per unit area of the elastic mat 3 is preferably 1 × 10 ⁶ to 8 × 10 ⁶ N / m ³ . The reason is that since less than 30% of the lower surface of the lower surface of the elastic mat 3 is placed on the floor supporting member 2, if the static spring constant is less than 1 × 10 ⁶ N / m ³ , the sink occurs due to the floor load. When the static spring constant is more than 8 × 10 ⁶ N / m ³ , when an impact force is applied to the floor finishing material 6, the amount of compressive deformation due to the impact force is small. This is because the impact force can be easily transmitted to the floor support member 2.

Since the static spring constant of the elastic mat 3 is set to 8 × 10 ⁶ N / m ³ or less, the elastic mat 3 is supported by the support plate 26 of the floor support member 2.
In order to prevent burying in the floor support member, the area placed on the floor support member 2 is preferably 3% or more. Therefore, the lower surface of the elastic mat 3 is preferably exposed at less than 97%.

As a material of the elastic mat 3, a fibrous mat such as a rock wool mat or a glass wool mat, or a porous body such as a urethane foam or a rubber foam can be used. Small sound-absorbing felts, etc., have a large reduction in thickness due to compression, causing sinking of the floor surface, and will no longer function as a floor.
Static spring constant is 1 × 10 ⁶ N to stably support the floor
/ m ³ or more.

To meet the value of the static spring constant, the density of 48~80kg / m ³ in the glass wool mat, the rock wool mat is suitably those density of 70~150kg / m ^3, for their thickness From the point of impact absorption and floor stability
20 to 50 mm is suitable.

The above-mentioned fibrous mat is preferable because the air inside the elastic mat 3 flows out to the outside when compressed and deformed, and the resilience is small, so that the shock absorbing effect is higher than that of the foam.

Further, the floor panel material 4, the discard material 5, and the floor finish material 6 may be those which are usually used. Specifically, as the floor panel material 4, a particle board having a thickness of about 20 mm and the discard material 5 are used. Can be a plywood having a thickness of about 9 mm, and the floor finishing material 6 can be a wooden floor material having a thickness of about 12 mm.

Since the floor structure according to the present embodiment is configured as described above, it acts as follows when an impact is applied to the upper surface of the floor covering 6.

First, when a heavy floor impact force is applied to the upper surface of the floor covering 6, the elastic mat 3 has a static spring constant of 1 × 10 ⁶ to 8 × 10 ⁶ N / m ³ , The impact force can be absorbed until it is transmitted to the floor support member 2. For this reason, the impact force transmitted from the floor support member 2 to the floor slab 1 is small, and the impact force is also absorbed by the elastic body 22 at the lower end of the floor support member 2, so that the vibration of the floor slab 1 is reduced to go downstairs. Very little heavy floor impact noise is emitted.

When a lightweight floor impact force is applied to the floor finishing material 6, the elastic mat 3 and the elastic body 22 of the floor support member 2 absorb the floor impact force in the same manner as in the case of the heavy floor impact force. Numeral 3 absorbs the solid vibration sound generated in the floor panel material 4 on the upper surface side, and absorbs the impact sound emitted and diffused into the underfloor space from the lower surface side where 70% or more is exposed.
For this reason, the lightweight floor impact sound propagated downstairs is extremely reduced.

FIGS. 4 and 5 show a first modification of the floor structure according to the embodiment, and the floor supporting member 2 in the first modification has the following structure. That is, the support plate 26 is formed in a rectangular frame slightly smaller than the floor panel material 4,
An adjusting bolt 24 and an elastic body 22 are provided at each of the four corners of the support plate 26. Accordingly, one floor support member 2 is arranged for one floor panel member 4.

FIG. 6 shows a modified example of the support member 2 in the first modified example. In this modified example, the support plate 26 is a grid frame in the shape of a cross, each of the four corners and the center of the support plate 26. To
The adjustment bolt 24 and the elastic body 22 are provided.

FIG. 7 shows a second modification of the floor structure according to the embodiment. In this second modification, the floor panel member 4 has a diameter of about
10 mm through holes 41 are provided at a pitch of about 300 mm. On this floor panel member 4, floor joists 8 of a thickness of about 12 mm are arranged in a vertical and horizontal direction at a pitch of about 300 mm. In this way, the impact sound generated on the floor finishing material 6 when an impact is applied to the finishing material 6 is diffused in the space 81 between the floor joists 8 and passes through the through holes 41 of the floor panel material 4. To reach the elastic mat 3, and is directly absorbed on the upper surface side of the elastic mat 3.

Although not shown in the above-described embodiment and each modification, the elastic mat 3 may be provided with a suitable sound absorbing hole such as a through hole or a semi-through hole. By doing so, the elastic mat 3
The sound absorbing area of the elastic mat can be more effectively absorbed, and the impact sound released into the underfloor space can be more effectively absorbed.
Is a fibrous mat, the air inside the elastic mat 3 flows out of the sound absorbing hole to the outside at the time of floor impact, so that the elastic mat 3 is hard to repel, so that the floor panel material 4 and the floor finishing material 2 Vibration due to repulsion is small, and vibration of the floor surface can be stopped quickly.

Hereinafter, a sound insulation performance test of floor impact sound performed for evaluating the present invention will be described.

First, the following concrete floor structures were prepared as test targets.

Floor support member: elastic body 22 is rubber with hardness of 50 degrees, adjusting bolt 24
Is a steel bolt with a diameter of 10 mm, the support plate 26 is 20 mm thick, and each side is 10
0mm square particle board.

Elastic pad: thickness 25 mm, glass wool mat density 64kg / m ^3.

Floor panel material: 20mm thick particle board.

Timber: 9mm thick plywood.

Floor finish: 12mm thick wood floor.

Next, for comparison, a floor structure was prepared as a comparative example having the same material as that of the specific example and having a structure as shown in FIG.

FIG. 8 shows the floor impact sound level for heavy floor impact sound and FIG. 9 shows the floor impact sound level for lightweight floor impact sound, respectively.
The measurement results measured based on the provisions of 18 are shown. Is L _H -50 those embodiments for sound insulation grade for heavy floor impact sounds,
Of Comparative Example is L _H -60, is L _L -50 those embodiments for light floor impact sound, that of the comparative example a L _L -55, those of the comparative example that of example As compared with the above, the class is improved by 2 for the heavy floor impact sound and 1 class for the light floor impact sound. The reason why the effect of improving the sound insulation property against the heavy floor impact sound is high is that the elastic mat 3 effectively absorbs the heavy floor impact force between the floor panel member 4 and the floor support member 2.

(Effect of the Invention) As described above, according to the floor structure according to the present invention, the static spring constant per unit area is 1 × 10 ⁶ to 8 × 10 ⁶ on the floor supporting member arranged on the floor substrate. elastic mat having a sound absorption is N / m ³ is, because it is mounted is exposed 70% or more portions of the lower surface thereof, when the heavy floor impact force is applied on the floor covering, an elastic mat Absorbs these impacts and does not transmit them to the floor support member, so that the vibration of the floor base is reduced and the heavy floor impact noise emitted downstairs is reduced.

In addition, the solid vibration noise generated in the floor panel material is absorbed from the upper surface of the elastic mat, and the light impact sound emitted and diffused into the underfloor space is absorbed from the lower surface of the elastic mat, so it is propagated downstairs. Lightweight impact noise is also reduced.

As described above, the floor structure of the present invention effectively shields the weight and the light floor impact sound propagated downstairs, and thus has a high sound insulation effect not only for the light floor impact sound but also for the heavy floor impact sound. .

[Brief description of the drawings]

1 to 3 show a floor structure according to an embodiment of the present invention. FIG. 1 is a sectional view, FIG. 2 is a partially enlarged sectional view, FIG. 3 is a plan view, FIG. 5 shows a first modification of the embodiment, FIG. 4 is a sectional view, FIG. 5 is a plan view, FIG. 6 is a plan view showing a modification of the support plate in the first modification, FIG. The figure shows a sectional view of a second modified example of the above embodiment, FIGS. 8 and 9 show the test results of the floor impact sound insulation performance of the embodiment and the comparative example, and FIG. In this case, FIG. 9 shows a case of a light impact sound, and FIGS. 10 to 12 show sectional views of conventional floor structures. 1 concrete floor slab (floor base) 2 floor support member 3 elastic mat 4 floor panel material 5 discard material (upper surface member) 6 floor finish material (upper surface member) 22 Elastic body

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hideki Miyamoto 2-3-18 Nakanoshima, Kita-ku, Osaka-shi, Osaka Inside Daiken Kogyo Co., Ltd. (56) References Japanese Utility Model Showa 64-29437 (JP, U) ( 58) Surveyed field (Int.Cl. ⁶ , DB name) E04F 15/18 601 E04F 15/20 E04F 15/22 E04F 15/00 101

Claims (1)

(57) [Claims] A plurality of floor support members having an adjustable height and having an elastic body such as rubber at a lower end are dispersedly arranged on a floor base made of a concrete floor slab or the like. Above, the static spring constant per unit area is 1 × 10 ⁶
An elastic mat having a sound absorbing property of 8 × 10 ⁶ N / m ³ is placed substantially horizontally, exposing a portion of 70% or more of its lower surface,
A floor manufacturing method, wherein a rigid floor panel material is laid on the elastic mat, and an appropriate upper surface member made of a discarded material, a floor finishing material, or the like is laid on the floor panel material.