JP3501337B2 - Noise barrier - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof wall, and more particularly, it relates to two wall members which are arranged in parallel with each other with a predetermined space therebetween, and both wall members which are located between these wall members. It comprises a frame member which is held at a predetermined interval and is connected thereto, and a porous soundproof member which is located between the both wall members and which is partitioned by the both wall members and functions to block the transmission of sound from one to the other. Regarding sound barrier.

[0002]

2. Description of the Related Art As a soundproof wall that partitions each room such as a house,
For example, a soundproof wall having an improved sound insulation function, which is formed by placing two wall members made of gypsum board in parallel with each other with a predetermined gap and interposing a soundproof member between these wall members. There is. As a soundproof member to be interposed between both wall members of such a soundproof wall, for example, as disclosed in JP-A-1-165850, glass wool, JP-A-1-1-1
A honeycomb core as disclosed in Japanese Patent No. 37044 and a member having a Helmholtz resonance part as disclosed in Japanese Patent Laid-Open No. 55-36566 are known.

[0003]

By the way, in the conventional soundproof wall of this type, resonance transmission due to resonance between each wall portion and the air spring between both wall portions in a relatively low frequency region,
In addition, for the coincidence frequency in a relatively high frequency region, a costly sound insulation measure is taken with a complicated structure.

Therefore, an object of the present invention is to provide a sound-proof measure for resonance transmission in a relatively low frequency region and a coincidence frequency in a relatively high frequency region with a single lightweight and low-cost soundproof member. is there.

[0005]

The present invention relates to a soundproof wall,
The soundproof wall includes two wall members that are arranged in parallel with each other with a predetermined space therebetween, a frame member that is located between the two wall members and that holds both wall members at a predetermined space, and connects the two wall members. A soundproof wall composed of a porous soundproofing member which is located between the wall members and which is partitioned by these both wall members and which functions to block the transmission of sound from one to the other. It is characterized by being configured as follows.

That is, the porous soundproofing member constituting the soundproofing wall includes a vibration damping portion that is in contact with the inner surfaces of the two wall members and that is interposed between the anti-vibration modes of the two wall members. It is characterized in that it is integrally provided with a sound absorbing portion located between the inner surfaces of the both wall members interposed between the antinodes of the vibration modes between the wall members and the internode portions.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In a soundproof wall according to the present invention,
The vibration damping portion of the porous soundproofing member has a columnar shape and is interposed between the two wall members in a compressed state, and the sound absorbing portion has a plate shape and is separated from the inner surfaces of the both wall members. It can be configured to be interposed between the inner surfaces.

Further, in the soundproof wall according to the present invention, the vibration damping portion of the porous soundproof member has a columnar shape and is interposed between the wall members in a compressed state, and the sound absorbing portion has a plate shape. It can be configured to be interposed between both wall members while being fixed to the inner surface of one wall member of the both wall members. In this case, the sound absorbing parts may be formed at both ends of the vibration damping part, and the sound absorbing parts may be fixed to the inner surfaces of the both wall members.

Further, in the soundproof wall according to the present invention, one or a plurality of damping parts of the porous soundproof member can be formed in the sound absorbing part, and each surface of the sound absorbing part can be formed in an uneven shape. . Further, in the soundproof wall according to the present invention, the porous soundproof member is formed in a flat plate shape, and is sandwiched from both sides by a protruding portion provided on each inner surface of the both wall members so as to be interposed between the both wall members. However, it is possible to configure the sandwiching portion sandwiched by both of these protruding portions as a vibration damping portion and the non-sandwiching portion as a sound absorbing portion.

Further, the soundproof wall according to the present invention has two wall members which are arranged in parallel with each other with a predetermined space therebetween, and which are located between the two wall members and which are held at a predetermined space and are connected to each other. A soundproof wall comprising a frame member and a porous soundproof member that is located between the wall members and that is partitioned by the wall members and that blocks the transmission of sound from one to the other. A surface of the vibration damping portion facing the node side of the vibration mode of the both wall members, the vibration damping portion being in contact with each inner surface of the both wall members interposed between the wall members at the antinode of the vibration mode. Is formed in a concavo-convex shape to form a sound absorbing portion.

As the wall member constituting the soundproof wall according to the present invention, a thin plate member such as gypsum board, iron, aluminum, hard resin or the like can be preferably adopted. Further, as the frame member, wood, various metals, resins, hard rubbers, etc. can be preferably adopted, and the frame member may be integrally formed on the inner surface of one or both of the wall members. Further, as the porous soundproof member, a porous elastic body such as urethane foam or a porous fiber molding can be preferably adopted.

[0012]

In the soundproof wall having such a structure,
In the state where the porous soundproofing member is interposed between both wall members, the vibration damping portion is interposed at a portion serving as an antinode of the vibration mode between the both wall members to regulate the vibration of the both wall members, and the relatively low frequency region The resonance transmission due to the resonance between each wall member and the air spring between the both wall members is blocked. Further, the sound absorbing part integrated with the vibration damping part is interposed between the antinode and the internode of the vibration mode between both wall members to exert a sound absorbing function, and is effective against the coincidence frequency in a relatively high frequency region. Sound insulation.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIGS. 1 to 3 show a part of a soundproof wall according to Embodiment 1 of the present invention. The soundproof wall 10a is a wooden frame 1
1 and two wall members 12 and 13 made of gypsum board attached to both sides of the wooden frame 11 and each frame 11a of the wooden frame 11.
And a soundproof member 14 interposed between the wall members 12 and 13 in the partition portion 11b formed by.

The soundproof member 14 is made of urethane foam having elasticity of open cells, and has a rectangular flat plate portion 1.
4a and a cylindrical protrusion 1 located at the center of the flat plate portion 14a
4b. The soundproof member 14 may be made of urethane foam having the elasticity of closed cells. In the soundproof member 14, the flat plate portion 14a constitutes the sound absorbing portion in the present invention, and the cylindrical protrusion portion 14b.
Constitutes the damping section in the present invention. The flat plate portion 14a of the soundproof member 14 has substantially the same shape and size as the partition portions 11b of the wooden frame 11, and is formed to have a thickness of approximately 1/3 of the thickness of each partition portion 11b. The cylindrical protrusion 14b has a predetermined diameter and is formed slightly longer than the thickness of each partition 11b.

Each soundproof member 14 is a partition 1 of the wooden frame 11.
In the state of being fitted in 1b, it is sandwiched in a state of being slightly pressed by both wall portions 12 and 13. The outer peripheral edge of the flat plate portion 14a is in contact with each frame 11a, and the cylindrical protrusion 1
The tip surface of 4b is fixed to the inner wall surface of each wall member 12, 13. In the soundproof wall 10a, each partition 11
The frame 11a forming b serves as a node of the vibration mode, and the central portion of each partition 11b is an antinode. The cylindrical protrusion 14b intervenes in the center of the partition 11b which is the antinode of the vibration mode, and the flat plate 14a intervenes in the space of the partition 11b which is the internode of the vibration mode and the antinode. There is.

In the soundproof wall 10a having such a structure, when the soundproof member 14 is interposed between the wall members 12 and 13, the cylindrical projection 14b functioning as a vibration damping portion vibrates the wall members 12 and 13. Resonance between the wall members 12 and 13 and the air spring between the wall members 11 and 13 in a comparatively low frequency region by controlling the vibration of the wall members 12 and 13 by interposing the antinode of the mode. The resonance transmission due to is blocked. Further, the flat plate portion 14a functioning as a sound absorbing portion is provided with the both wall members 12, 1
The sound absorbing function is exerted by being interposed between the antinode and the internode of the vibration mode of No. 3, and effectively insulates the coincidence frequency in a relatively high frequency region. (Embodiment 2) FIGS. 4 and 5 show a part of a soundproof wall according to Embodiment 2 of the present invention. The soundproof wall 10b
Is the first embodiment described above except for the soundproof member 15 used.
The soundproof wall 10a has the same structure as that of the soundproof wall 10a.

However, the soundproof member 15 is made of the same material as the soundproof member 14 described above, and maintains the same spacing between the rectangular flat plate portion 15a and a predetermined portion of the flat plate portion 15a. It is composed of a plurality of columnar protrusions 15b positioned in the same position. In the soundproof member 15, a total of five cylindrical protrusions 15b are formed, and the flat plate portion 1
Centering around the cylindrical protrusion 15b located at the center of 5a,
One each is located in the vertical and horizontal directions.

In the soundproof member 15 having such a structure, as with the soundproof member 14 described above, the cylindrical protrusion 15b functions as a vibration damping portion and the flat plate portion 15a functions as a sound absorbing portion, but the antinode of the vibration mode. Is extremely effective for the soundproof walls 10b existing in the partition portion 11b by the number corresponding to the cylindrical protrusions 15b of the soundproof member 15. Further, in the soundproof member 15, since the respective cylindrical protrusions 15b are compressed by the both wall members 12 and 13 and have different densities from each other and the flat plate portion 15a, the sound absorption peak is different depending on each part and is wide. Exhibits sound absorption effect in the area. (Embodiment 3) FIGS. 6 and 7 show a part of a soundproof wall according to Embodiment 3 of the present invention. The soundproof wall 10c
Is the soundproof wall 1 described above except for the soundproof member 16 used.
The same constituent member as 0b is used.

The soundproof member 16 is made of the same material as the soundproof member 15 described above, and has a rectangular flat plate portion 1.
6a and a plurality of columnar protrusions 16b that are positioned at a predetermined portion of the flat plate portion 16a with the same spacing. In the soundproof member 16, a total of five cylindrical protrusions 16b are formed, and one cylindrical protrusion 16b is located in the center of the flat plate 16a, and one cylindrical protrusion 16b is disposed in each of the vertical and horizontal directions. It is similar to the soundproof member 15 in that it is present.

In the soundproof member 16, however, both sides of the flat plate portion 16a are formed in a concavo-convex shape having a large number of concavities and convexities, and the surface area of the flat plate portion 16a which functions as a sound absorbing portion is increased, and the Helmholtz resonance due to the surface concavity and convexity. Due to the effect, the sound absorbing function of the flat plate portion 16a is further improved. In addition, in the soundproof member 16, the concave and convex shapes on both surfaces of the flat plate portion 16a are formed by a large number of concave portions that are curved in a concave shape, but the concave and convex shape may also be formed by a large number of triangular peaks and valleys. . In this case, many triangular peaks and valleys diffusely reflect sound, so a sound deadening effect due to diffused reflection of sound is expected. (Embodiment 4) FIG. 8 shows a part of a soundproof wall according to Embodiment 4 of the present invention. The soundproof wall 10d is configured in the same manner as the soundproof wall 10a described above except for the adopted soundproof member 17.

The soundproof member 17 is made of the same material as the soundproof member 14 described above, and has a rectangular flat plate portion 1.
7a and a cylindrical protrusion 17b located at the center of the flat plate 17a. The soundproofing member 17 differs from the soundproofing member 14 in that the cylindrical protrusion 17b is formed so as to project from only one side surface of the flat plate portion 17a.
Due to this difference, the other side surface of the flat plate portion 17a is fixed to the inner surface of the one wall portion 12. Therefore, the soundproof member 17
The flat plate portion 17a also has the vibration damping function of the one wall member 12, and also exhibits the vibration damping function in the high frequency region. (Fifth Embodiment) FIG. 9 shows the soundproof member 1 of the fourth embodiment.
The soundproof wall 10e according to the fifth embodiment adopting the soundproof member 18 according to the seventh modification is shown. The soundproof member 18 is composed of two flat plate portions 18a1 and 18a2 and a columnar projection 18b bridging these flat plate portions 18a1 and 18a2.
It differs from the soundproof member 17 in that it has a2. In the soundproof member 18, the flat plate portions 18a1 and 18a2
Is fixed to the inner surfaces of the wall members 12 and 13 to further improve the vibration damping function and the sound absorbing function of the soundproof member 17. (Embodiment 6) FIGS. 10 and 11 show a part of a soundproof wall according to Embodiment 6 which employs still another porous soundproof member. The soundproof wall 10f is configured in the same manner as the soundproof wall 10a described above except for the adopted soundproof member 19.

However, the soundproof member 19 has a cylindrical shape corresponding to the cylindrical protrusion 14b constituting the soundproof member 14 described above, and a large number of uneven portions are formed on the outer periphery of the cylindrical main body 19a. The outer peripheral surface portion 19b is configured as a sound absorbing portion. The soundproof member 19 includes the wall members 12, 13
The columnar main body 19a exerts a vibration damping function and the outer peripheral surface portion 19b exerts a sound absorbing function by being fixed in a compressed state to a portion corresponding to the central portion of the partition portion 11b.

Each of the soundproof members 14 to 19 in the above-described fifth to sixth embodiments is an example formed as a single member. However, these soundproof members 14 to 19 are used as the wall members 12, 1 respectively.
It can be divided into two parts on the third side. In this case, the divided portions of the soundproof member may be overlapped with each other while being fixed to the inner surfaces of the wall portions 12 and 13 so as to be interposed between the wall members 12 and 13. (Embodiment 7) FIG. 12 shows a part of a soundproof wall according to Embodiment 7 which employs still another porous soundproof member.
The soundproof wall 20 is of a type different from the soundproof walls 10a to 10f described above, and both wall members 21 and 2 adopted.
Reference numeral 2 is a frame member (not shown), which is integrally connected to the wall members 21 and 22 at a predetermined interval.
A large number of protrusions 21b and 22b are formed on the inner surfaces of a and 22a. Further, the soundproof member 23 used is
It is a flat plate made of the same material as the soundproof member 14 and is interposed between the wall members 21 and 22.

The protruding portions 21b, 2 of the two wall members 21, 22
2b are opposed to each other with a predetermined space therebetween, and sandwich a soundproof member 23 interposed in the central portion between both wall members 21, 22 with a predetermined force from both sides. In the soundproof member 23 in the sandwiched state, the sandwiched portion 23a is slightly compressed, and the non-sandwiched portion 23b is located between the adjacent protrusions 21b and 22b and is released. . Therefore, in the soundproof member 23, the holding portion 2
3a constitutes a vibration damping portion to exert a vibration damping function, and the non-sandwiching portion 23b constitutes a sound absorbing portion to exert a sound absorbing function.

The projecting portions 21 of both wall members 21 and 22 are
b and 22b may be integrally formed on the inner surfaces of the wall portions 21a and 22a, or they may be formed by separate members.
It may be fixed to the inner surface of 22a.

[Brief description of drawings]

FIG. 1 is a partial cutaway perspective view of a soundproof wall according to a first embodiment of the present invention.

FIG. 2 is a partial perspective view in which the soundproof wall shown in FIG. 1 is disassembled.

3 is a cross-sectional plan view of the soundproof wall shown in FIG. 1 taken along line 3-3 in FIG.

FIG. 4 is a partial cutaway perspective view of a soundproof wall according to a second embodiment of the present invention.

5 is a cross-sectional plan view of the soundproof wall of the second embodiment taken along line 5-5 of FIG.

FIG. 6 is a partially cutaway perspective view of a soundproof wall according to a third embodiment of the present invention.

7 is a cross-sectional plan view of the soundproof wall of Example 3 taken along the line 7-7 in FIG.

FIG. 8 is a partial transverse plan view of a soundproof wall according to a fourth embodiment of the present invention.

FIG. 9 is a partial transverse plan view of a soundproof wall according to a fifth embodiment of the present invention.

FIG. 10 is a partial cutaway perspective view of a soundproof wall according to a sixth embodiment of the present invention.

FIG. 11 is a partial cross-sectional plan view of the soundproof wall according to the sixth embodiment.

FIG. 12 is a partial cross-sectional plan view of a soundproof wall according to a seventh embodiment of the present invention.

[Description of Reference Signs] 10a, 10b, 10c, 10d, 10e, 10f ... Soundproof wall, 11 ... Wooden frame, 11a ... Frame body, 11b ... Partition section, 1
2, 13 ... Wall member, 14 ... Soundproof member, 14a ... Flat plate portion,
14b ... Cylindrical protrusion, 15 ... Soundproof member, 15a ... Flat plate portion, 15b ... Cylindrical protrusion, 16 ... Soundproof member, 16a ...
Flat plate portion, 16b ... Cylindrical protrusion portion, 17 ... Soundproof member, 17
a ... flat plate portion, 17b ... cylindrical protrusion portion, 18 ... soundproof member,
18a1, 18a2 ... Flat plate portion, 18b ... Cylindrical protrusion portion, 1
9 ... Soundproof member, 19a ... Cylindrical main body, 19b ... Outer peripheral surface part, 20 ... Soundproof wall 21,22 ... Wall member, 21a, 22
a ... Wall portion, 21b, 22b ... Projection portion, 23 ... Soundproof member,
23a ... pinching part, 23b ... non-pinching part.

Continuation of the front page (56) Reference JP-A-7-145610 (JP, A) JP-A-8-68018 (JP, A) Actual development Sho-49-53515 (JP, U) (58) Fields investigated (Int .Cl. ⁷ , DB name) G10K 11/16 E04B 1/86

Claims (8)

(57) [Claims] 1. A pair of wall members which are arranged in parallel with each other with a predetermined space therebetween, a frame member which is located between the two wall members and which holds the two wall members at a predetermined space and connects them, and A soundproof wall composed of a porous soundproofing member that is located between the wall members and that is partitioned by these both wall members to block the transmission of sound from one to the other, and the porous soundproofing member is A vibration damping portion that abuts on the inner surfaces of the both wall members by interposing a portion serving as an antinode of the vibration mode between the wall members, and an interposing portion that intervenes between the antinode and the internode of the vibration mode between the wall members. A soundproof wall integrally provided with a sound absorbing portion located between the inner surfaces of both wall members. 2. The vibration damping portion of the porous soundproofing member has a columnar shape, and is interposed between the both wall members in a compressed state, and the sound absorbing portion has a plate shape, and is different from each inner surface of the both wall members. The soundproof wall according to claim 1, wherein the soundproof wall is interposed between both inner surfaces in a separated state. 3. The vibration damping portion of the porous soundproof member has a columnar shape and is interposed between the two wall members in a compressed state, and the sound absorbing portion has a plate shape, and one wall member of the both wall members is formed. The soundproof wall according to claim 1, wherein the soundproof wall is interposed between both wall members while being fixed to the inner surface of the wall. 4. The soundproofing according to claim 3, wherein the sound absorbing parts of the porous soundproofing member are formed at both ends of the vibration damping part, and the sound absorbing parts are fixed to the inner surfaces of the both wall members. wall. 5. The soundproof wall according to claim 1, wherein one or more vibration damping portions of the porous soundproofing member are formed in the sound absorbing portion. 6. The soundproof wall according to claim 1, wherein each surface of the sound absorbing portion of the porous soundproofing member is formed in an uneven shape. 7. The porous soundproofing member has a flat plate shape, and is sandwiched between the both wall members by a projecting portion provided on each inner surface of the both wall members and sandwiched from both sides. The soundproof wall according to claim 1, wherein the sandwiching portion sandwiched between the two forms a vibration damping portion, and the non-sandwiching portion forms a sound absorbing portion. 8. Two wall members which are arranged in parallel with each other with a predetermined space therebetween, a frame member which is located between these two wall members and which holds the two wall members at a predetermined space and connects them, and the both wall members. A soundproof wall composed of a porous soundproofing member that is located between and is partitioned by these both wall members and that functions to block the transmission of sound from one to the other, and an antinode of a vibration mode between the both wall members. A vibration-damping portion that is in contact with each inner surface of the both wall members, and the surface of the vibration damping portion facing the node side of the vibration mode of the both wall members is formed in an uneven shape to absorb sound. A soundproof wall characterized by being composed of.