JP2001011998A - Sound insulation structure of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively suppress the propagation of the sound from an upper floor of a building to a lower floor. SOLUTION: In the sound insulation structure of the building, a beam 12 and joists 14, 16 thereacross are provided above a ceiling, and a floor member 18 is installed on the joists 14, 16. A sound absorbing member 20 with a sound absorbing material filled in an upwardly opened container member is fitted between the joists. A vibration control plywood 30 with a vibration damping sheet fitted thereto is installed on the sound absorbing member 20 between the joists. A network-like sound absorbing body 28 at least a surface of which is formed of a soft resin foam or rubber is arranged on this vibration control plywood 30, and the floor member 18 is installed thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulation structure of a building for suppressing sound transmission from an upper floor to a lower floor of the building.

[0002]

2. Description of the Related Art Conventionally, as means for suppressing the propagation of sound from the upper floor to the lower floor of a building, for example, a sound insulation member disclosed in Japanese Utility Model Publication No. 4-48245 has been known. This member
A mat-shaped sound absorbing material is filled inside a container member that opens upward, and is configured to be fitted between joists below the floor material.

[0003]

The mere installation of the sound absorbing member disclosed in the above publication limits the sound absorbing effect obtained. In particular, the sound generated by the floor impact on the upper floor is easily transmitted to the lower floor even if it is slight, and it is an important issue for improving comfort to effectively perform the sound insulation.

An object of the present invention is to solve such a problem by a rational structure.

[0005]

As a means for solving the above-mentioned problems, according to the present invention, a beam is provided above a ceiling,
A plurality of joists intersecting with the beams are provided on the beams, and a structure for performing sound insulation of a building in which flooring materials are laid on these joists is provided in a container member opening upward. A sound-absorbing member filled with a sound-absorbing material is fitted between the joists, and a vibration-damping plywood having a vibration-proof material sandwiched therein is laid on the sound-absorbing member. A net-shaped sound absorber made of resin is provided, and the floor material is laid thereon.

According to this configuration, the sound generated on the upper floor (floor material or above) is effectively absorbed by the multi-layer sound insulation structure including the net-like sound absorber, the vibration damping plywood, and the sound absorbing member between the joists. Therefore, the transmission of this sound to the lower floor is reliably suppressed.

Here, since the net-shaped sound absorbing body is interposed between the damping plywood and the floor material, the anti-slip member for suppressing the slipping of the floor material with respect to the vibration-damping plywood is provided. It can be made to function effectively as well. That is, since the joist sound absorbing member has a structure in which a soft sound absorbing material is filled in a container member that opens upward, if the net-like sound absorbing body is directly disposed on the joist sound absorbing member, The installation state of the sound absorber becomes unstable, and it is difficult to effectively exhibit the sound insulation function and the anti-slip function, but in the structure according to the present invention,
First, a vibration damping plywood is installed on the joist sound absorbing member, and a net-shaped sound absorbing body is arranged on a flat and relatively hard upper surface of the vibration damping plyboard, thereby effectively exhibiting a sound absorbing effect of the net-shaped sound absorbing body. It has become possible.

That is, according to the present invention, an ideal sound insulation structure that maximizes the performance of each member by laminating a joist sound absorbing member, a vibration damping plywood, and a net-shaped sound absorbing body in this order below the flooring material. It is possible to build.

Although the specific shape of the container member constituting the above-mentioned joist sound absorbing member is not particularly limited, an ear portion protruding outward is provided at an upper end thereof, and a vibration damping material is provided on the ear portion. If the portion is sandwiched between the joist and the damping plywood, it is possible to more effectively suppress the propagation of sound from the floor material to the joist.

When a ceiling is suspended from the beam, a plurality of suspension members including a vibration isolator are used for the suspension, so that sound propagation from the beam to the ceiling can be effectively suppressed. Is even higher.

Further, the sound insulation effect is further enhanced by forming the plate constituting the ceiling with a vibration isolating material interposed therebetween.

[0012] The floor material on which the floor material is provided is also
The sound transmission from the upper floor to the lower floor is more effectively suppressed by using a plate material in which a vibration isolator is sandwiched.

As for the wall material, it is preferable that the wall material is separated upward from the floor material. Thereby, sound propagation from the wall material to the floor material is reliably blocked.

In this case, a cover member having at least a lower end made of an elastic body is provided below the wall material, and the cover member connects the floor material and the wall material with the elastic member in contact with the floor material. If the gap is covered, it is possible to maintain an excellent sound insulation effect by the sound absorbing action of the elastic body while enhancing the appearance of the room by covering the gap with the cover member.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the drawings.

The building shown in FIG. 1 has a plurality of columns 10, and a plurality of parallel beams 12
Has been passed over. A plurality of joists 14 extending in a direction orthogonal to this (a depth direction in FIG. 1) are assembled on an intermediate portion of the beam 12, and edge joists 16 are assembled on both ends of the beam 12. The second floor material 18 is laid on the upper side. Various members generally used as flooring materials, such as flooring, carpet, various mats, tatami mats, and rush rugs, can be applied to the flooring material 18.

The sound insulation structure according to the present invention is characterized in that
And between the joist 14 and the edge joist 16. This structure includes a joist sound absorbing member 20, a vibration damping plywood 30, and a net-like sound absorbing body 28 as also shown in FIGS. 2 and 3.

Each of the joist sound absorbing members 20 includes a container member 22 having a substantially U-shaped cross section which opens upward. Although the container member 22 has a shape that is opened forward and backward in the illustrated example, it may be a complete container shape that surrounds the internal space from all sides. It is more preferable that the material of the container member 22 is relatively easily elastically deformed, and a synthetic resin such as polyvinyl chloride is preferable.

The interior of the container member 22 is filled with a mat-shaped sound absorbing material 24. The sound absorbing material 24 may have a sound absorbing function by itself, and is preferably a fiber material such as glass wool, a synthetic resin material such as polyethylene terephthalate, or a composite material obtained by appropriately laminating them. .

The whole joist sound absorbing member 20 has such a size that it can be fitted between the joists 14 or between the joists 14 and the edge joists 16 from above. The sound absorbing member 20 is supported by the beam 12 from below.

At the left and right ends (upper end) of the container member 22, ear portions 22a extending forward and backward integrally with the container member 22 are provided.
Project from both left and right outer sides, and the ear portion 22a is
4 and edge joists 16 and each sound absorbing member 2 between the joists.
Zero installations have been made.

In this embodiment, a vibration isolator 26 made of a soft synthetic resin or rubber is adhered to the back surface of the ear 22a, and the vibration isolator 26 is in contact with the upper surface of the joist 14 or the edge joist 16. It has become. This vibration isolator 26 is
It may be attached to the surface (upper surface) of a, and more effective if attached to both front and back surfaces.

However, the shape of the container member 22 may be any shape as long as it is open upward and the inside thereof can be filled with the sound absorbing material 24, and can be appropriately designed within the range. For example, the ear 22a can be omitted as appropriate.

The vibration damping plywood 30 includes an upper surface plate 31 and a lower surface plate 32.
And a vibration-proof sheet 34 made of a vibration-proof material such as rubber, which can be easily manufactured by press molding, for example. The damping plywood 30 is placed on each of the joist sound absorbing members 20. That is, the ear 22a of each of the joist sound absorbing members 20 is constructed so as to be sandwiched between the joists 14, 16 and the damping plywood 30.

The specific structure of the damping plywood 30 is not particularly limited as long as it includes at least a vibration-proof material such as the vibration-proof sheet 34. For example, as shown in FIG. 4, a nonwoven fabric 36 made of polyethylene, polyethylene terephthalate, or the like is disposed on the upper and lower surfaces of the vibration isolation sheet 34, and the nonwoven fabric 36 is bonded to the upper plate 31 and the lower plate 32 with an adhesive (for example, specially modified vinyl). (Copolymer resin) 38.

The specific material and structure of the vibration isolating sheet 34 are not particularly limited, and those made of an elastic or viscoelastic material having a vibration absorbing function are preferable. Specifically, a mixture obtained by rolling a mixture of recycled rubber and an inorganic filler into a sheet and bonding a nonwoven fabric to the back surface is preferable.

The net-shaped sound absorber 28 has a net shape as shown in FIG. 5 and is interposed between the vibration damping plywood 30 and the floor 18. That is, the net-shaped sound absorbing body 28 is firstly arranged on the vibration damping plywood 30, and the floor material 18 is placed thereon.

The net-shaped sound absorbing body 28 may have any shape as long as at least its surface is formed of a soft foamed resin or rubber, and specifically, a core yarn (for example, polyester) forming a mesh of about 5 to 10 mm. It is preferable to use a foamed acrylic resin coated with a foamed acrylic resin.

The wall material (first-floor wall material and second-floor wall material) 40 according to this embodiment has the same configuration as that of the vibration damping plywood 30. That is, as shown in FIG. 3, it is constituted by a plate material in which a vibration-proof sheet 44 made of rubber or the like is interposed between the inner wall material 41 and the outer wall material 42. These wall materials 40
Is installed inside the pillar 10 with the base 11 sandwiched between the pillar 10.

As shown in FIG. 3, the second-floor wall member 40 is disposed at a position where a gap 46 is secured between the lower end and the floor member 18. That is, the second-floor wall member 40 is separated upward from the floor member 18.

A cover member 48 is fixed to the second-floor wall member 40 along a lower edge thereof. This cover member 4
The lower end of the tongue 8 is a tongue piece 48a made of an elastic material (for example, a soft synthetic resin or rubber) that can be flexibly deformed.
Cover member 48 so as to contact the upper surface of the flooring 18.
Is disposed, the cover member 48 is in a state of covering the gap 46 from the indoor side.

The first-floor ceiling 70 below the beam 12 has a plurality of ridges 72 arranged in parallel with each other,
Field receiver 7 assembled on the field edge 72 so as to be orthogonal to
4 and the edge support 74 is connected to the beam 12 via a plurality of suspension members 60. That is, the beam 12
The first-floor ceiling 70 is suspended via a suspension member 60.

As shown in FIGS. 6A and 6B, each hanging member 60 has a main body 61 extending in the vertical direction, an upper mounting member 62 connected to the upper end thereof, and a lower mounting member 64. are doing. A screw hole 61a is formed at an upper end of the main body 61, and a screw shaft 62a screwed with the screw hole 61a is formed at a lower end of the upper mounting member 62. And the entire length of the suspending member 60 can be adjusted by the relative rotation between the main body 61 and the upper mounting member 62.

The upper mounting member 62 is provided with a bolt insertion hole penetrating the upper mounting member 62 in the thickness direction, and a plurality of bolts 63 inserted through the bolt insertion hole are used for the upper mounting member 6.
2 is fixed to the side surface of the beam 12.

The main body 61 is formed of a relatively flexible material such as a synthetic resin. The lower frame has a hollow frame 6
1b is formed, and the lower mounting member 64 is mounted so as to be relatively vertically movable while penetrating the bottom wall of the frame portion 61b. A head 64a having a larger cross-sectional area than other portions is formed at the upper end of the lower mounting member 64, and a block-like protection made of rubber or the like is provided between the head 64a and the bottom wall of the frame portion 61b. The vibration material 65 is sandwiched.

A bolt insertion hole is provided at the lower end of the lower mounting member 64, and the lower mounting member 64 is fixed to the side surface of the field edge receiver 74 by a plurality of bolts 66 inserted into the insertion hole. I have.

In the present invention, the manner of incorporating the vibration isolator 65 into the suspension member 60 is not particularly limited. Further, the material is not limited to the above-described solid such as rubber, but may be a material filled with a fluid vibration-proof material such as oil.

As shown in FIG. 7, a horizontal ceiling plate 76 is fixed to the lower surface of the ridge 72. This ceiling board 76
The vibration damping sheet 7 made of rubber or the like between the lower plate 77 and the upper plate 78 is also the same as the vibration damping ply plate 30.
9 is composed of a plate material sandwiched therebetween.

The anti-vibration sheet 79 may be sandwiched between the two plates 77 and 78 in advance before construction, and may be carried into the construction site in an integrated state.
The anti-vibration sheet 79 may be interposed between the two plates 77 and 78 at the construction site. This is the same for the vibration damping sheets 34 and 44 of the vibration damping plywood 30 and the wall material 40.

According to the structure described above, the following operation and effect can be obtained.

Below the flooring 18, a net-like sound absorber 28,
Since the multi-layer sound insulation structure including the damping plywood 30 and the joist sound absorbing member 20 is constructed, transmission of the sound generated on the floor material 18 to the lower floor is reliably suppressed.

Since the net-shaped sound absorbing body 28 is interposed between the damping plywood 30 and the flooring 18 and the surface of the net-shaped sound absorbing body 28 is made of foamed synthetic resin or rubber, The mesh 18 can effectively prevent the floor material 18 from slipping on the plywood 30.

Since the net-like sound absorbing body 28 is arranged on the vibration damping plywood 30, the net-like sound absorbing body 28 can be installed in a stable state, whereby the sound insulation and the non-slip function of the net-like sound absorbing body 28 are effective. It is possible to make use of it. In other words, since the joist sound absorbing member 20 has a structure in which the soft sound absorbing material 24 is filled in the container member 22 that opens upward, if the net sound absorbing body 28 is directly disposed on the joist sound absorbing member 20. However, the installation state of the net-shaped sound absorbing body 28 becomes unstable, and it is difficult to exert its function effectively. However, as shown in FIG. Plywood 3
By adopting a laminated structure in which the net-shaped sound absorbing body 28 is disposed on a flat and relatively hard upper surface, the sound absorbing performance of each member can be maximized.

The container member 2 of the joist sound absorbing member 20
2 is provided with an ear portion 22a, a vibration isolator 26 is provided on the back surface of the ear portion 22a, and the ear portion 22a is sandwiched between the joists 14, 16 and the damping plywood 30. Propagation of sound from flooring 18 to joists 14 and 16 can also be effectively suppressed. This effect is obtained, for example, by adding the vibration isolator 2 to the upper surface of the ear 22a.
6 can be achieved in the same manner.

When suspending the first-floor ceiling 70 to the beam 12, a plurality of suspending members 61 including the vibration-proof material 65 may be used.
Since the ceiling plate 76 is made of a damping plywood, the beam 1
The propagation of sound from 2 to the lower floor through the ceiling 70 can also be effectively suppressed.

Since the second-floor wall member 40 is spaced upward from the floor member 18 to secure the gap 46, sound transmission from the wall member 40 to the floor member 18 can be reliably blocked. In addition, a cover member 48 is provided below the wall member 40, and the tongue 48 a made of an elastic material is in contact with the floor member 18 by the cover member 48 to form a gap 4 between the floor member 18 and the wall member 40.
6 so as to enhance the appearance of the room by covering the gap 46, and to provide an excellent sound insulation effect due to the sound absorbing effect of the tongue piece 48a itself and the sound absorbing effect of the vibration isolating sheet 44 of the wall material 40. Can be maintained.

In this embodiment, the sound insulation structure between the first floor and the second floor has been described. However, the present invention is not limited to this, and the sound insulation structure between the second floor and the third floor or between the third floor and the fourth floor can be used. It can be widely applied to sound insulation between upper and lower floors.

[0048]

EXAMPLE A transmission experiment on the first floor of a second floor impact sound was conducted for a house having the structure of the present embodiment shown in FIG. 1 and a conventional wooden house having no sound insulation equipment. FIG. 8 shows the result. Note that the sound insulation levels L-30 and L-3 shown in FIG.
The specific contents of 5, L-40, ... are as shown in Table 1 below, and such levels are determined by the Architectural Institute of Japan.

[0049]

[Table 1] As shown in FIG. 8, it was confirmed that by employing the structure of the present example, the sound insulation performance was improved by 15 to 30 dB over the entire frequency range of the sound to be heard daily. Therefore, according to the sound insulation structure of the present invention, it is possible to greatly contribute to improvement of the comfort of the house.

[0050]

As described above, according to the present invention, in a building where floor materials are laid on a plurality of joists, a vibration damping member including a joist sound absorbing member fitted between the joists and a vibration damping material are provided. Since the plywood and the net-shaped sound absorbing body are laminated in order from the bottom, and the floor material is placed thereon, the vibration absorbing function and sound absorbing performance of the joist sound absorbing member, the vibration damping plywood, and the net-shaped sound absorbing body are provided. The sound absorbing effect can be obtained by making the most of the above, and the function of preventing the floor material from slipping on the vibration damping plywood by the net-like sound absorbing body can be effectively exerted.

[Brief description of the drawings]

FIG. 1 is a sectional front view of a building according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a joist sound absorbing member is installed between joists of the building.

FIG. 3 is a cross-sectional front view showing a portion near a boundary between a second floor material and a wall material of the building.

FIG. 4 is a sectional view showing a structural example of a vibration damping plywood provided on the joist sound absorbing member.

FIG. 5 is a cross-sectional perspective view showing the vibration damping plywood, a net-like sound absorbing body and a floor material installed thereon.

FIG. 6A is a front view of a suspending member provided between a beam and a ceiling of the building, and FIG. 6B is a side view of the suspending member.

FIG. 7 is a sectional front view showing a portion near a boundary between a ceiling plate and a first-floor wall material of the building.

FIG. 8 is a graph showing the results of an experiment on the performance of blocking floor impact noise between the structure of the present example and the conventional structure.

[Explanation of symbols]

 REFERENCE SIGNS LIST 12 beam 14 joist 16 edge joist (joist) 18 flooring material 20 sound absorbing member between joists 22 container member 22 a ears 24 sound absorbing material 26 vibration damping material provided in ears 28 net-shaped sound absorbing body 30 damping plywood 34 vibration damping sheet 40 wall material 44 vibration-proof sheet (vibration-proof material) 46 gap between floor material and wall material 48 cover member 48a tongue piece (elastic body) 60 hanging member 65 vibration-proof material 70 first-floor ceiling 76 ceiling plate 79 Anti-vibration sheet

Claims (7)

[Claims] 1. A sound insulation structure for a building in which a beam is provided above a ceiling, a plurality of joists intersecting the beam are provided on the beam, and floor materials are laid on these joists. hand,
A sound absorbing member filled with a sound absorbing material in a container member opened upward is fitted between the joists, and a vibration damping ply plate in which a vibration proof material is sandwiched inside these joists is laid, A sound insulation structure for a building, wherein a net-like sound absorber having at least a surface made of a soft foamed resin or rubber is disposed on the damping plywood, and the floor material is laid thereon. 2. The sound insulation structure for a building according to claim 1, wherein an ear portion projecting outward is provided at an upper end of the container member constituting the joist sound absorbing member, and a vibration insulator is provided on the ear portion. A sound insulation structure for a building, wherein the ears are sandwiched between the joists and the damping plywood. 3. The sound insulation structure for a building according to claim 1, wherein a ceiling is suspended from the beam via a plurality of suspension members including a vibration isolator. 4. The sound insulation structure for a building according to claim 3, wherein the plate constituting the ceiling is formed by sandwiching a vibration damping material inside. 5. The sound insulation structure for a building according to claim 1, wherein a wall material of the floor on which the floor material is provided is a plate material in which a vibration proof material is sandwiched. Sound insulation structure of a building. 6. The sound insulation structure for a building according to claim 1, wherein a wall material of a floor on which the floor material is provided is separated upward from the floor material. Construction. 7. The sound insulation structure for a building according to claim 6, wherein a cover member having at least a lower end formed of an elastic body is provided below the wall material, and the cover is provided in a state where the elastic body contacts the floor material. A sound insulation structure for a building, wherein a gap between the floor material and the wall material is covered by a member.