JP2000008526A - Sound insulation board, and sound insulation floor material and structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain radiated sound generated at the time when a shock is applied to the floor board to thereby reduce generation of shock noise by disposing a sound insulation board containing a metal plate between a wooden floor board forming a floor surface and a floor building body so that the board are brought into contact with the floor board and the floor building body. SOLUTION: A floor building body 3 formed by fixing a particle board 3b as a floor board onto a floor joist 3a by means of machine screws and polyvinyl acetate adhesive is grounded onto a large beam, with a nonwoven cloth impregnated with liquid rubber hardened material interposed as a vibration insulating material therebetween. A metal plate 5 formed of a steel plate whose four corners are cut in an isosceles triangular shape and which is preliminarily applied with coating of butyl rubber rust-proof paint on its surface is layed over the whole surface of the body 3. On the plate 5, a wooden floor board is layed, and the board is fixed to the body 3 by means of machine screws 7. Accordingly, without changing the design of floor building body, shock sound in a heavy floor can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproofing material, a soundproofing flooring, and a soundproofing floor structure, and more particularly, to suppressing a radiation sound generated from a floor frame when an impact is applied to a floor surface of a building. Soundproofing material.

[0002]

2. Description of the Related Art Conventionally, floor impact noise has been generated by a relatively light impact source such as a spoon falling and a heavy noise generated by a relatively heavy impact source such as a child jumping down. They are roughly divided into

In order to reduce light noise, it is extremely effective to extend the impact time and reduce the excitation force. For this reason, the lightweight sound transmitted to the lower floor is eliminated exclusively by selecting floor finishing materials.

[0004]

However, the countermeasures against heavy noise are not effective in reducing the excitation force by the floor finishing material.
In a high-rise house or the like having rigidity such as a structure, countermeasures such as increasing the thickness of the floor frame and increasing the arrangement of reinforcing bars have been taken in order to reduce heavy noise.

[0005] In addition, most of ordinary detached houses and low-rise apartments have a flexible structure such as timber and steel frame, so that it is not possible to take measures by increasing the amount of floor frames or increasing the arrangement of reinforcing bars. Various measures have been devised, but it has not been fully resolved.

SUMMARY OF THE INVENTION An object of the present invention is to provide a soundproofing material capable of reducing heavy floor impact noise to a level that can be generally used without changing the design of the floor frame.

[0007]

According to the present invention, there is provided a soundproofing plate disposed between a wooden floorboard forming a floor surface and a floor frame, wherein the soundproofing plate includes a metal plate, and wherein the soundproofing plate includes a metal plate. Is in close contact with the wooden floorboard and the floor frame, so that when an impact is applied to the surface of the wooden floorboard, a soundproof plate capable of suppressing the radiated sound generated from the floorframe, and soundproofing using the soundproof panel The present invention relates to a floor material and a soundproof floor structure.

The inventor of the present invention has found that a floor impact sound generated in a flexible structure such as a general detached house or a low-rise apartment, especially a low-rigidity and lightweight floor frame, eliminates a heavy floor impact sound and provides a more comfortable dwelling. In order to reduce such heavy floor impact noise, various soundproofing materials were studied.

Surprisingly, the present inventor has found that a soundproof plate including a metal plate exhibits extremely good soundproof performance. In addition, the present inventor has found that by providing a viscoelastic body on at least one surface of such a metal plate, it is possible to obtain even better soundproofing performance, and has completed the present invention.

To reduce the floor impact noise, it is effective to increase the rigidity of the floor structure and increase the weight. However, for flexible floors such as detached houses, there is a limit to increasing the weight of the flooring material, regardless of the design change of the floor frame, and it is considered inappropriate to use a heavy material such as a metal plate for the flooring material. Was. In addition, a metal plate or the like may cause a resonance phenomenon. From this point, it has been considered that it is not preferable to use a metal plate as a floor material in order to suppress floor impact noise by suppressing vibration.

[0011] The present invention uses a soundproofing plate including such a metal plate as a vibration damping material, and makes such a soundproofing plate closely contact with a wooden floor plate forming a floor surface and a floor frame, thereby significantly improving heavy floor impact sound. Is based on the finding that

The soundproof plate of the present invention can remarkably improve the heavy floor impact sound of the floor structure without requiring a design change of the floor frame. For this reason, it is particularly effective for a floor material laid on a wooden floor structure frame or an ALC floor frame frequently used in general detached houses and low-rise apartments.

The soundproofing board of the present invention is useful not only for a floor frame of a detached house or a low-rise apartment, but also when a structural frame of a building is lightweight or has low rigidity. As the application destination, it can be expected to be applied to factory floors, office floors, outer walls of factories and the like that are easily affected by vibration, and partition walls.

According to the present invention, heavy floor impact noise can be reduced by using a very effective soundproof plate which can be put to practical use at low cost. Flooring including such a soundproof board,
In particular, is quite useful in L _H -55 level of noise control,
The thickness can be set thin.

Therefore, if the flooring material of the present invention is used, the floor thickness can be suppressed to a minimum even in a building where the eave height must be increased due to a change in the design of the building. Also, in order to prepare for an aging society, even in a housing that aims to be barrier-free, the height of the floor can be made uniform without changing the design of the structural frame of the building. For example, according to the present invention, the floor thickness can be set to 40 mm or less, more preferably 30 mm or less.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of a soundproof floor structure according to an example of the present invention. FIG. 2 is a plan view of a soundproof floor structure according to an example of the present invention. FIG. 1 is a sectional view taken along the line AA 'in FIG.

The soundproof floor structure 1 of the present invention comprises a floor material 2 and a floor frame 3. The flooring 2 is a wooden floorboard 4 forming a floor surface.
And a soundproof plate made of a metal plate 5. In this example, the floor frame 3 is composed of a joist 3a and a floor panel 3b, and the metal plate 5 is in close contact with the wooden floor panel 4 and the floor panel 3. In the soundproof floor structure 1, when a shock is applied to the surface of the wooden floorboard 4, radiated sound generated from the floor frame 3 can be suppressed.

In the present invention, a flooring is formed by laminating a soundproof board including a metal plate and a wooden floor board. In this floor material, the metal plate suppresses the vibration of the wooden floor plate by bringing the soundproof plate into close contact with the floor frame, so that the heavy floor impact sound can be remarkably improved.

The reason why the metal plate is effective as a soundproof plate is that the metal plate has a high rigidity and requires a very large stress to generate a forced bending deformation at the time of vibration or the like. It is. Also, the metal plate has a large restoring stress against such bending deformation.

Further, since such a metal plate has a large specific gravity itself, it is heavy in spite of its small thickness. In particular, when the floor frame is lightweight, it has a very effective effect on vibration suppression due to the effect of weight increase.

As described above, in the soundproof plate according to the present invention,
The metal plate increases the weight and rigidity of the flooring. Such a metal plate is made of a single metal such as iron, lead, aluminum, copper, or lead, an alloy such as brass, bronze, duralumin, stainless steel, or a special metal such as spring steel or vibration damping steel. Is fine.

Further, such a metal plate is formed into a plate-like shape by subjecting various kinds of metal scrap, crushed slag, and the like to heat fusion of solder powder, polyester powder, epoxy resin, urethane resin, liquid rubber, silicon rubber, and the like, chemical reaction, and the like. It may be molded into a piece. The surface of such a metal plate is preferably subjected to a rustproofing treatment with plating, various paints, asphalt, a rustproofing material or the like. Further, the density of such a metal plate is preferably high. This is because the thickness of the metal plate can be reduced and the floor material can be designed to be thin.

The plane shape of the metal plate may be square, rectangular, parallelogram, trapezoidal, triangular, hexagonal or the like, and there is no particular limitation, and a perforated plate, notch plate,
It may be a mesh plate or the like. The cross-sectional shape of the metal plate is flat,
Various shapes such as a corrugated plate shape and a folded plate shape may be used. The corrugated or folded metal plate is very effective in terms of increasing rigidity, although the thickness is increased. If a shape such as a corrugated sheet which is useful for absorbing unevenness of the floor frame is adopted, the vibration isolation effect can be further improved.

In order to attach the soundproofing plate including such a metal plate to the floor frame, it is preferable to provide a notch, a hole, or a net-like portion for fixing screws on the metal plate. As shown in FIGS. 1 and 2, a gap 6 is provided between the metal plates 5, a screw 7 is driven into the wooden floor plate 4 above the gap 6, and several screws are provided around the metal plate 5. By fixing, the metal plate 5 can also be fixed indirectly. Further, a spacer having the same thickness as the metal plate may be attached to the gap 6.

When a floor material is formed from a metal plate and a wooden floor plate, the metal plate can be attached to the wooden floor plate using an adhesive, an adhesive, a screw, a nail, or the like. In such a case as well, for attachment to the floor frame, it is sufficient to physically fix the wooden floor plate to the floor frame with screws or the like. Since the metal plate is heavy and has difficulty in cutting, it is not necessary to form the metal plate in the same plane as the wooden floor plate.

The metal plate according to the present invention does not need to be disposed on the entire surface of the floor frame, but may be disposed in a plurality of layers, and preferably covers 30 to 90% of the area of the floor frame. 30
If the ratio is less than%, a variation occurs in the vibration damping effect, and the variation increases as the ratio decreases. Conversely, 90%
Even if the cover is over, it takes time to fix the metal plate, and the workability is poor, which is not preferable.

In the structural body of a building, all parts are often not vibrated.
No metal plate is required for the m width. In such a case, it is more practical and more advantageous in terms of cost to emphasize the workability and to secure the smoothness of the floor by using a member such as a wooden board that is easily cut even with the same thickness as the metal plate.

In the soundproof plate according to the present invention, the heavy floor impact sound can be further improved by providing a viscoelastic body on at least one surface of the metal plate and supporting the wooden floor plate or the metal plate on the surface or the point.

FIG. 3 is a longitudinal sectional view of the soundproof floor structure of this embodiment. The floor material 10 was used for the soundproof floor structure 9. The flooring 10 includes a wooden floorboard 11 and a soundproof plate 12, and the soundproof plate 12 includes a metal plate 13 and a viscoelastic body 14. The viscoelastic body 14 has a sheet shape and is in close contact with the lower surface of the metal plate 13 and the upper surface of the floor frame 3.

As described above, when the viscoelastic body is on at least one of the upper and lower surfaces of the metal plate, the viscoelastic body exerts a vibration damping effect, thereby further improving the vibration damping effect of the soundproof plate. In addition, the viscoelastic body is useful for absorbing unevenness of the wooden floorboard and floor frame, and has a high vibration isolation effect.

The viscoelastic body is a general term for a substance having both viscosity and elasticity. In the present invention, such a viscoelastic body functions as a vibration insulating material, a vibration damping material, and a spring material. Such a viscoelastic body comes into direct contact with the floor frame via the metal plate and acts as a vibration insulating material having a small Young's modulus, so that the vibration is not easily transmitted. In addition, the viscoelastic body according to the present invention uses a material having a much higher viscosity ratio, and is used between a metal plate and a floor frame, or between a metal plate and a wooden floor plate, thereby acting as a restraint-type material, thereby reducing vibration. Helps absorb energy.

Further, the viscoelastic body according to the present invention can function as a spring material. In such a case, the viscoelastic body absorbs vibration transmitted from the wooden floorboard to the soundproofing board. The function of the spring material can be further enhanced by providing the viscoelastic body on the upper and lower surfaces of the metal plate. In this case, the metal plate has a shape floated by the spring action of the upper and lower viscoelastic bodies, and the metal plate just becomes a weight, and a dynamic vibration absorbing effect is obtained.

In the present invention, such a viscoelastic body can be arranged in a state of being dispersed on at least one surface of a metal plate. Such a viscoelastic body works as a spring material. FIG.
Is a longitudinal sectional view of the soundproof floor structure of this example.

A flooring 16 was used for the soundproof floor structure 15.
The flooring 16 is composed of a wooden floorboard 17 and a soundproof plate 18, and the soundproof plate 18 is composed of a metal plate 19 and viscoelastic bodies 20 and 21. The viscoelastic bodies 20 and 21 are disk-shaped, and
7, the upper surface of the metal plate 13, the lower surface of the metal plate 13, and the upper surface of the floor frame 3.

In the soundproof floor structure 15, the wooden floorboard 17
The metal plate 19 and the metal plate 19 and the floor frame 3
The upper surface space 22 is surrounded by the wooden floor plate 17, the viscoelastic body 20, and the metal plate 19, and is surrounded by the metal plate 19, the viscoelastic body 21, and the floor frame 3. A lower surface space 23 is formed.

The upper space 22 and the lower space 23 serve as deformation permitting layers of the metal plate and the viscoelastic body above and below the metal plate. Further, in such a soundproof floor structure, a piece-shaped viscoelastic body can be used instead of the disc-shaped viscoelastic body. Such a viscoelastic body comes into contact with a wooden floor plate, a metal plate or the like at a point.

Further, the viscoelastic bodies can be alternately arranged on the upper surface and the lower surface of the metal plate. FIG. 5 is a longitudinal sectional view of the soundproof floor structure of this example. FIG. 6 is a plan view of the soundproof floor structure of this example.

A floor material 25 was used for the soundproof floor structure 24.
The floor material 25 is composed of a wooden floor plate 26 and a soundproof plate 27, and the soundproof plate 27 is a metal plate 28 made of a spring rope and the viscoelastic body 2.
9, 30. The viscoelastic bodies 29 and 30 are disk-shaped similarly to the viscoelastic body of FIG.
8 and the floor frame 3 are in close contact with each other.

In this soundproof floor structure 24 as well, the surfaces of the viscoelastic bodies 29 and 30 are in contact with the wooden floor plate 26, the metal plate 28 and the floor frame 3 as in the viscoelastic body of FIG. 2
The reference numerals 9 and 30 are alternately arranged on the upper surface and the lower surface of the metal plate 28. Also in this soundproof floor structure 24, similarly to the viscoelastic body of FIG. 4, the upper surface space 31 surrounded by the wooden floor plate 26, the viscoelastic body 29, and the metal plate 28, and the metal plate 28, the viscoelastic body 29 and the floor A lower surface space 32 surrounded by the frame 3 is formed.

In order to obtain such a soundproof plate, when the viscoelastic body is provided on the lower surface of the metal plate when the viscoelastic body is provided, the viscoelastic body is not provided on the upper surface of the metal plate in that portion. Conversely, when the viscoelastic body is provided on the upper surface of the metal plate, the viscoelastic body is alternately provided on the upper surface and the lower surface of the metal plate without disposing the viscoelastic body on the lower surface of the portion of the metal plate. .

In the soundproofing plate provided in this manner, when the wooden floor plate is vibrated, the metal plate is pushed by the viscoelastic body and forcibly deforms in a wide area, receives bending stress, and receives the bending stress. Works as a spring material, and the effect of weakening the excitation force becomes very large, so that vibration is less likely to be transmitted to the floor frame.

Further, in such a soundproof floor structure, the viscoelastic body works as a spring material. By providing such a viscoelastic body on the upper and lower surfaces of the metal plate, the metal plate is vertically lifted by a spring, so that the metal plate just becomes a weight and a dynamic vibration absorbing effect is obtained.

Further, in such a soundproof floor structure, a metal plate made of spring steel is used as the soundproof plate. Such a metal plate is forcibly fixed to the floor frame by the wooden floor plate, and is partially bent by the bending stress of the viscoelastic body. When such a metal plate is vibrated, a spring effect is exerted over a wide area, and loss of impact energy is effectively performed.

In such a soundproof floor structure, by changing the weight of the metal plate and the size, thickness and spring constant of the viscoelastic body, conditions effective for the target noise frequency can be set. In the case of using the bending of the metal plate when vibrating as a spring, the material of the viscoelastic body is more suitable to be elastic rather than viscous.

The viscoelastic body preferably has a hardness of 40 to 80 as measured by an A-type hardness meter specified in JIS-K-6301. If it is less than 40, the amount of deformation until the metal plate is bent is too large, and the double impact phenomenon at the time of excitation (the collision between the wooden floor plate and the metal plate and the metal plate and the floor frame is not preferable. Then, the vibration of the metal plate becomes difficult to be attenuated, and the middle to high frequency side of 250 Hz or more becomes worse, and it seems that the hearing does not improve, which is not preferable.

Specific examples of the viscoelastic body according to the present invention are as follows. As the polymer that plays the main role of the viscoelastic body,
SBR, NBR, BR, IR, IIR, EPDM, EP
M, NR, CR, urethane rubber, silicone rubber, fluorine rubber, polysulfide rubber, acrylic rubber, epichlorohydrin rubber, chlorosulfonated polyethylene, ethylene / acryl rubber, propylene oxide rubber, norbornene rubber, various rubbers such as rubber SIS, SBS, SEB
S, thermoplastics such as olefin-based thermoplastic elastomer, polyester-based thermoplastic elastomer, urethane-based thermoplastic elastomer, polyamide-based thermoplastic elastomer, 1,2-polybutadiene-based thermoplastic elastomer, PVC-based thermoplastic elastomer, and fluorine-based thermoplastic elastomer Elastomers; thermoplastic resins such as EVA, PE, PP, polyvinyl butyral, PVA, and saturated polyester;
Thermosetting resins such as epoxy, unsaturated polyester, vinyl ester, phenol, and melamine can be used alone or in combination.

The rubber may be either vulcanized or non-vulcanized. If you want to make the characteristics of viscosity strong, you can adjust with plasticizer, tackifier resin, various oligomers, fillers, etc.If you want to make the characteristics of elasticity strong, you can increase the crosslink density, rubber or other It may be adjusted by using the above polymer together.

Incidentally, such a viscoelastic body may be used as required.
Various rust preventives can be mixed to also serve as rust preventive for the metal plate. In addition, the surface of the viscoelastic body is subjected to adhesive processing,
It may be used as a temporary fixing to a floor frame, a metal plate, and a wooden floor plate. In addition, when an adhesive sheet is provided on the entire surface above and below the metal plate, a butyl rubber sheet is particularly preferable. In particular, when reclaimed butyl rubber is used for the adhesive and the sheet, a step of degreasing rust-preventive oil is not required, and the rust-preventive step is not required. Greater rust effect.

The wood floorboard according to the present invention includes conifers such as pine, cedar and cypress, and hardwood such as lauan, oak and beech, plywood, particle board, hard board, semi-hard board, and century board. The wooden floorboard needs to have a smooth surface without steps in order to absorb the unevenness of the floor frame and form the floor surface. The wooden floorboard according to the present invention is used as a base material when a finishing material is fixed thereon with screws or nails. In this case, fulfilling the role of preventing the screws and nails from coming off is a condition to be met. In addition, it is preferable that the material suppress generation of volatile organic substances such as formalin, which has recently become a problem.

The soundproof flooring material of the present invention is a soundproof board on a floor frame.
And wood floorboards. The weight of this flooring is the area of the floor frame
1m^Two15-100kg / m in weight per hit^Two
Is preferred. 15kg / m^TwoIf less than, vibration isolation performance is insufficient
I do. Conversely, 100kg / m ^TwoOver, the installation of furniture etc.
In order to cope with the increase in weight during installation, structural members such as floor frame
Enlargement and the like cannot be avoided. 20-60kg
/ M^TwoIs a better range.

The soundproof flooring material of the present invention remarkably improves heavy floor impact sound due to the vibration suppressing action of the soundproof plate. For this reason, the floor thickness can be suppressed to a minimum even in a building where the eave height has to be increased due to a change in the design of the building. Also, in order to prepare for an aging society, even for houses that aim to be barrier-free, without changing the design of the structural frame of the building,
The height of the floor can be made uniform. From such a viewpoint, the soundproof flooring material of the present invention preferably has a thickness of 40 mm or less, more preferably 30 mm or less.

As described above, the soundproofing board and the soundproofing flooring material of the present invention can remarkably improve the heavy floor impact sound of the floor structure without changing the design of the floor frame. For this reason, the soundproofing board of the present invention is useful not only in the floor frame of a detached house or a low-rise apartment, but also in the case where the structural frame of a building is lightweight or rigid.

The floor frame used in the soundproof floor structure of the present invention can be manufactured from various materials. Such materials include concrete, mortar, RC, P
C, wood material, ALC material and the like.

The soundproof board and the soundproof flooring material of the present invention are particularly effective for laying a wooden floor structure or an ALC floor structure among such floor structures. The wooden floor frame and the ALC floor frame are widely used in general detached houses and low-rise apartments, and there is little room for changing the design of the floor frame itself, and countermeasures for heavy floor impact noise are desired. .

[0055]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the drawings based on examples and comparative examples. Examples described below are:
In each case, experiments were conducted on a wooden structural body which is considered to be extremely difficult to reduce heavy floor impact noise.

Example 1 A soundproof floor structure 1 as shown in FIGS. 1 and 2 was manufactured. The joist 3a (40 mm width x 1) is orthogonal to the I-beam of the girder.
820 mm length × 95 mm height) are provided at 303 mm intervals, and a 15 mm thick particle board 3 b (910 mm width × 1820 mm length) is provided on the joist 3 a as a floor plate.
Was fixed with a screw 8 and a vinyl acetate adhesive. The floor frame 3 was grounded to the girder, and at this time, a 4 mm-thick nonwoven fabric-impregnated liquid rubber cured product was interposed as a vibration insulating material.

On the floor frame 3, an iron plate (45 mm thick.times.300 mm wide.times.450 mm long) notched by an isosceles right triangle with four sides each having a right angle at each of the four corners is 50 mm in advance. Is placed on the entire surface of the floor frame 3 and the particle board 4 (12 mm thick × 910 mm width × 1820 length) is placed on the metal plate 5.
Of wooden floorboard consisting of
The test piece was fixed to the thick particle board 3b.

Regarding the obtained soundproof floor structure, JIS-A
According to -1419, a heavy floor impact sound was measured. In addition,
The ceiling was made of two 12.5 mm thick gypsum boards, and the sound absorbing material was 100 mm thick glass wool. The following Examples and Comparative Examples were all under the same conditions. The size of the sample is
It was 2.73 m x 1.82 m. The results are shown in Table 1.

Example 2 As shown in FIG. 3, a soundproof floor structure 9 was manufactured in the same manner as in Example 1 except that the floor material 2 was changed to the floor material 10 in the soundproof floor structure of Example 1. In the flooring material 10, a non-vulcanized butyl rubber sheet having a thickness of 2 mm is used as the viscoelastic body 14, and an iron plate (4.5 mm thickness × 300 mm width × 300 mm length) is used as the metal plate 13. The soundproof plate 10 was used.

The viscoelastic body 14 is spread over the entire surface of the floor plate 3b,
Then, an interval of about 2 cm is set in the short side direction of the floorboard 3b, and an interval of about 15cm is set in the long side direction of the floorboard 3b.
The metal plate 13 was arranged. The number of the metal plates 13 was five in the 1.82 m direction of the floor plate 3b and eight in the 2.73 m direction. 12 mm on the metal plate 13 as the wooden floor plate 11
Place a thick plywood (910mm width x 1820mm length)
A specimen was fixed to the floor plate 3b with screws. The measurement of the heavy floor impact sound was the same as in Example 1.

Example 3 As shown in FIG. 4, a soundproof floor structure 15 was manufactured in the same manner as in Example 1 except that the floor material 2 was changed to the floor material 16 in the soundproof floor structure of Example 1. As the viscoelastic bodies 20 and 21, vulcanized rubber pieces having a hardness of 50 (5 mm thick × 15 mmφ)
４０40 mmφ), and as the metal plate 19, a 4.5 mm thick iron plate (300 mm
mm width x 450 mm length). The viscoelastic bodies 20 and 21 were randomly attached to the upper and lower surfaces of the metal plate 19, respectively, to manufacture the soundproof plate 18.

The soundproof plate 18 is 450 mm long and 300 m long.
Three sheets each having a width of m were arranged in the 1.82 m direction of the floorboard 3b with the length direction applied, and were arranged at intervals of about 30 cm in the width direction of 2.73m of the floorboard 3b. Soundproof plate 18
On top of this, a particle board (12
(mm thickness x 910 mm width x 1820 length) and fixed to the floor plate 3b with screws to obtain a test sample. The measurement of the heavy floor impact sound was the same as in Example 1.

Example 4 As shown in FIGS. 5 and 6, a soundproof floor structure 24 was manufactured in the same manner as in Example 1 except that the floor material 2 was changed to a floor material 25 in the soundproof floor structure of Example 1. did. Viscoelastic body 29,3
As 0, a vulcanized rubber piece having a hardness of 70 (10 mm thick × 25
mmφ), and as a metal plate 28, a cold-rolled steel strip for springs (2.5 m
m thickness x 300 mm width x 1800 mm length).

As shown in FIG. 6, the upper surface of the metal plate 28
A line 33 is drawn from the positions of 50 mm, 150 mm, and 250 mm in the width direction toward the length direction.
Lines 34 were drawn in the width direction at a pitch of 0 to 100 mm. At the intersections of these lines 33 and 34, the viscoelastic body 29 was bonded every other in both the width and length directions. Next, a line similar to the upper surface is drawn on the lower surface of the metal plate 28, and the viscoelastic body 30 is attached to a position where the viscoelastic body 29 does not exist on the upper surface of the metal plate 28, and the soundproof plate 27 is attached. Manufactured.

The soundproof plate 27 has both ends separated by about 10 cm.
Eight sheets were arranged on the floor board 3b at intervals of about 2 cm, and a 12 mm-thick particle board was provided as a wooden floor board 26 on the soundproof board 27 to form a floor material 25. The floor material 25 was fixed to the floor frame 3 using screws (not shown) to obtain a soundproof floor structure 24, which was used as a specimen. The heavy floor impact sound was measured in the same manner as in Example 1.

Comparative Example 1 A floor structure 35 as shown in FIG. 7 was manufactured. In the sound-insulating floor structure of Example 1, a 12 mm-thick particle board (910 mm width × 1
820 mm length) was directly fixed onto the floor plate 3b with screws 7 to obtain the floor structure 35 in the same manner as in Example 1.
This was used as a specimen. The heavy floor impact sound was measured in the same manner as in Example 1.

[0067]

[Table 1]

As shown in Table 1, in Example 1, the weight of the soundproof flooring material was 43 kg per 1 m ² of the floor frame, the area ratio of the metal plate to the floor frame was 94%, and the thickness was 16.5.
mm. The heavy floor impact sound is L _H −
59, which is 6 dB at 63 Hz and 125 dB at 6 Hz of low frequency, which are particularly difficult to improve, as compared with the floor structure of Comparative Example 1, indicating that the effect is very high.

In Example 2, the area ratio of the soundproofing floor material to the floor frame was 72%, the weight was 39 kg / m ² , and the thickness was 21.5 mm. Heavy floor impact sound is L _H
−57, which is equivalent to L _H −55 using a 2 dB tolerance. Compared to the floor structure of Comparative Example 1, there is an improvement of 8 dB at 63 Hz and a decrease of 9 dB at 125 Hz, which are particularly difficult to improve, indicating a high soundproofing effect.

In the third embodiment, the soundproof floor material occupies the floor frame.
33% area ratio, weight 21kg / m^TwoRelatively
It was light and the thickness could be set to 26.5 mm. Heavy impact sound
Is L _H−58, which is 63 compared to the floor structure of Comparative Example 1.
7 dB at 10 Hz and 10 dB at 125 Hz.
In addition, the improvement is large even at a high frequency of 500 Hz or more.
And according to the feeling heard by human ears, L_HQuiet than -58
There is also the effect of hearing crabs.

In Example 4, the area ratio of the soundproof floor material to the floor frame was 87%, the weight was 28 kg / m ² , and the thickness was 29.5 mm. The weight impact noise is L _H −
55, and L _H −5 without using the 2 dB tolerance.
5 has been cleared. Also, compared to the floor structure of Comparative Example 1, there is a reduction of 10 dB at 63 Hz and 11 dB at 125 Hz, and can be reduced by two ranks at any frequency,
Very high soundproofing effect.

[0072] In Comparative Example 1, because the interest捨貼directly particle board to wood-based floor skeleton, heavy floor impact sounds are L _H -6
5, which indicates that further improvement is desired.

The soundproof floor structures of Examples 1 to 5
The low-frequency sound of 63 Hz or 125 Hz, which is difficult to reduce, can be greatly reduced, the thickness does not increase much, there is no extreme increase in weight, and it can be practically used in terms of cost.

[0074]

According to the soundproof board, the soundproof floor material and the soundproof floor structure of the present invention, it is possible to remarkably improve the heavy floor impact sound of the floor structure without changing the design of the floor frame.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a soundproof floor structure according to an example of the present invention.

FIG. 2 is a plan view of a soundproof floor structure according to an example of the present invention.

FIG. 3 is a longitudinal sectional view of a soundproof floor structure according to another example of the present invention.

FIG. 4 is a longitudinal sectional view of a soundproof floor structure according to another example of the present invention.

FIG. 5 is a longitudinal sectional view of a soundproof floor structure according to another example of the present invention.

FIG. 6 is a plan view of a soundproof floor structure according to another example of the present invention.

FIG. 7 is a cross-sectional view of a floor structure according to a comparative example.

[Explanation of symbols]

 1,9,15,24 soundproof floor structure 2,10,16,25 soundproof floor material 3 floor frame 3a joist 3b floorboard 4,11,17,26 wood floorboard 5,13,19,28 metal plate 6 gap 7, 8 Screw 14, 20, 21, 29, 30 Viscoelastic body 22, 31 Upper surface space 23, 32 Lower surface space 33, 34 line

Claims (10)

[Claims] 1. A soundproofing plate disposed between a wooden floorboard forming a floor surface and a floor frame, wherein the soundproofing plate includes a metal plate, and the soundproofing plate includes the wooden floorboard and the floorframe. A soundproofing plate that is capable of suppressing radiation sound generated from the floor frame when an impact is applied to the surface of the wooden floorboard by being in close contact with the floorboard. 2. The soundproof plate according to claim 1, wherein the viscoelastic body is disposed on at least one of an upper surface and a lower surface of the metal plate. 3. The viscoelastic body is arranged in a dispersed state, the viscoelastic body is in surface or point contact with the metal plate, and the viscoelastic body is in contact with the wooden floorboard or the floor frame. The upper surface space surrounded by the wooden floor plate, the viscoelastic body, and the metal plate or the lower surface space surrounded by the metal plate, the viscoelastic body, and the floor frame is formed. 3. The soundproofing plate according to claim 2, wherein: 4. The viscoelastic body is disposed on both sides of the metal plate, the upper surface space and the lower surface space are formed on both surfaces of the metal plate, and the viscoelastic body is provided below the upper surface space. The soundproof plate according to claim 3, wherein the soundproof plate is arranged on a lower surface of the metal plate, and the viscoelastic body is arranged on an upper surface of the metal plate above the lower surface space. 5. A viscoelastic body is disposed in a dispersed state on at least one of an upper surface and a lower surface of the metal plate, and an upper surface surrounded by the wood floor plate, the viscoelastic body, and the metal plate. A space or a lower surface space surrounded by the metal plate, the viscoelastic body, and the floor frame is formed, and the bending stress of the viscoelastic body causes the metal plate to bend toward the upper surface space or the lower surface space. Characterized by being
The soundproof plate according to claim 1. 6. The metal plate is made of spring steel, and the viscoelastic body is made of an A-type hardness meter defined by JIS-K-6301.
The soundproof plate according to claim 5, wherein the soundproof plate has a hardness of 0 to 80. 7. A soundproof flooring material comprising: a wooden floorboard forming a floor surface; and a soundproofing board disposed below the wooden floorboard, wherein the soundproofing board is formed of metal. The wooden floorboard is in close contact with the soundproofing board, and the soundproofing board is in close contact with the floor frame, so that when a shock is applied to the surface of the wooden floorboard, the wooden floorboard is generated from the floor frame. A soundproof flooring, characterized in that radiated sound can be suppressed. 8. The sound-insulating floor material has an area of 1 m ^{2 of the} floor frame.
The soundproofing flooring according to claim 7, wherein the flooring has a weight of 15 to 100 kg per unit. 9. A soundproof floor structure comprising a floor material and a floor frame, wherein the floor material is disposed between a wooden floor plate forming a floor surface and the wooden floor plate and the floor frame. A soundproofing board is provided, the soundproofing board includes a metal plate, the soundproofing board is in close contact with the wooden floorboard and the floor frame, and when an impact is applied to the surface of the wooden floorboard, A soundproof floor structure characterized in that radiated sound generated from a floor frame can be suppressed. 10. The soundproof floor structure according to claim 9, wherein said floor frame is made of a wooden material.