JP2007205071A - Sound insulation structure and heat insulating material used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound insulation structure by filling a heat insulating material having also a sound absorbing function inside a wall body thereby offering an easier construction work and reducing a construction cost without decreasing an interior room space. <P>SOLUTION: Sound insulating cavity portions 10 etc. with one end made open and another end closed are installed along a surface of a wall body 1 in the sound insulation structure 3. In the wall body 1, openings 30 etc. corresponding to open holes 14 etc. are formed at one end side of the cavity portions 10 etc. to connect an indoor space 31 with the cavity portions 10 etc., and to guide and absorb a sound such as an impact noise to floor or the like in an indoor space 31. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sound insulation wall structure applied to a building such as a detached house or a condominium, and a heat insulating material used therefor.

  Conventionally, in buildings such as detached houses, as one of the measures to reduce the floor impact sound that propagates from the upper floor to the lower floor, the sound pressure level is lowered by providing a sound absorbing mechanism on the wall or ceiling of the lower floor space. Such a method is known. Examples of the sound absorbing mechanism include a Helmholtz resonator and an acoustic tube.

  For example, Patent Document 1 and Patent Document 2 show examples of arrangement of acoustic tubes. That is, Patent Literature 1 discloses a wall structure in which a plurality of acoustic tubes are arranged along the inner wall surface of a wall body, and Patent Literature 2 discloses a wall structure in which a plurality of acoustic tubes are arranged inside a wall body. It is disclosed.

JP 7-302087 A JP 2001-3482 A

  However, when the acoustic tube is arranged along the inner wall surface of the wall as in the structure disclosed in Patent Document 1, there is a problem that the indoor space is narrowed by the outer diameter of the acoustic tube. It was. Further, as in the structure disclosed in Patent Document 2, even when an acoustic tube is disposed inside a wall body, a heat insulating material, a base material, or the like is usually provided inside the wall body such as an outer wall. Therefore, in order to secure a space for incorporating the acoustic tube, it is necessary to cover the wall body toward the indoor space side, and there is a problem that the indoor space is narrowed by that amount.

  Furthermore, since a new acoustic tube is provided on the wall, the number of parts increases, making the construction complicated, resulting in an increase in construction costs.

  Therefore, in order to solve the above-mentioned problems, the present invention provides a function as an acoustic tube to the heat insulating material itself filled in the wall body, so that the construction is easy without reducing the indoor space and the construction cost is also reduced. The object is to provide a sound insulation wall structure that can be kept inexpensive and a heat insulating material used therefor.

  In order to solve the above-mentioned problems, the sound insulation wall structure of the present invention has a heat absorbing material 3 filled in the wall body 1 with a sound absorbing cavity portion 10... Open at one end side and closed at the other end side. It is formed along the direction.

  Specifically, an opening 30... Corresponding to the opening 14... On one end side of the hollow portion 10... Is formed in the wall body 1, and the indoor space 31 and the hollow portion 10. I try to communicate. Further, a plurality of hollow portions 10... Having different lengths or substantially equal lengths are formed in the heat insulating material 3. Further, the wall body 1 is filled with a plurality of the heat insulating materials 3.

  The heat insulating material of the present invention is filled in the wall body 1, and is formed along the wall surface direction of the wall body 1 with a sound-absorbing cavity portion 10... That is open at one end side and closed at the other end side. It is characterized by being.

  Further, a plurality of divided members 20 and 21 each having a cavity constituting portion 22 having a shape obtained by vertically dividing the hollow portions 10... Are assembled so that the cavity constituting portions 22 and 22 are aligned with each other. Further, a plurality of hollow portions 10... Having different lengths or substantially equal lengths are formed.

  According to the present invention, the heat insulating material filled in the wall body is integrally formed with a hollow portion that functions as an acoustic tube, and the heat insulating material itself has a sound absorbing function, so that it propagates into the indoor space. While absorbing noise such as floor impact sound in the wall, it is possible to secure a wide indoor space as compared with the case where an acoustic tube is separately arranged on the wall. In addition, the number of parts is reduced, construction is easy, and construction costs can be kept low.

  In addition, by forming an opening in the wall and communicating the indoor space with the cavity portion of the heat insulating material, noise in the indoor space can be effectively guided to the cavity portion of the heat insulating material, and sound absorption efficiency can be improved. it can.

  Furthermore, by assembling a plurality of divided members having a cavity component portion to form a heat insulating material, the hollow portion can be easily formed compared to when the hollow portion is cut out from the heat insulating material, and sound absorption is achieved. A heat insulating material having a function can be easily manufactured.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The sound insulation wall structure according to an embodiment of the present invention is applied to, for example, the first floor outer wall of a detached house, and as shown in FIG. 1, a heat insulating material 3 having a sound absorbing function is filled inside the wall body 1. Yes.

  As shown in FIG. 2, the wall body 1 includes a wall shaft assembly 4 in which channel steel is assembled in a rectangular frame shape, an outer wall member 5 disposed on the outdoor side of the wall shaft assembly 4, and a wall shaft assembly 4. And an inner wall material 7 made of gypsum board or the like disposed on the indoor side of the inner wall frame 6. Then, the wall shaft assembly 4 is erected on the concrete foundation 8, and the inner wall frame 6 and the inner wall material 7 are disposed on the floor plate 9.

  The heat insulating material 3 is made of, for example, a polystyrene foam formed in a substantially rectangular parallelepiped shape, and is disposed between the inner wall frames 6 and 6 along the back surface of the inner wall material 7. The material of the heat insulating material 3 is not limited to polystyrene foam, but may be other materials that satisfy a required heat transmissibility.

  In this heat insulating material 3, a plurality of sound absorbing hollow portions 10, which function as acoustic tubes, are formed in parallel with each other along the wall surface direction (vertical direction) of the wall body 1 at a predetermined interval. . As shown in FIG. 3, the hollow portion 10 includes a vertical portion 11 that extends vertically from the upper surface of the heat insulating material 3 to the front of the lower surface, and a horizontal portion 12 that extends horizontally from the indoor side surface of the heat insulating material 3 to the vertical portion 11. The upper part of the vertical part 11 with respect to the communication part with the horizontal part 12 is closed by the plug body 13. Accordingly, the hollow portion 10 is formed in a substantially inverted L shape inside the heat insulating material 3, and one end side (upper end side) thereof is opened on the indoor side surface of the heat insulating material 3, and the other end side (lower end side). ) Is blocked.

  As shown in FIG. 4, each of the hollow portions 10... Has an opening 14 on one end side and a closed end on the other end side-by-side aligned at substantially the same level. Are almost equal. And the length of each hollow part 10 ... is set to about 1/4 of the wavelength of the floor impact sound used as sound absorption object.

  In manufacturing the heat insulating material 3, as shown in FIG. 5, for example, two divided members 20 and 21 are assembled. That is, one split member 20 is formed with a wave-shaped cavity component part 22 in which the horizontal part 12... And the vertical part 11 .. of the hollow part 10. 21 is formed with a wave-shaped cavity constituting part 22 in which the vertical parts 11... Are vertically divided, and the divided members 20 and 21 are combined with each other to form the vertical parts 11. Are assembled so as to form a plug, and the plugs 13 are packed at the upper ends of the vertical portions 11. Accordingly, the hollow portions 10 can be easily formed in the heat insulating material 3, and the heat insulating material 3 can be easily manufactured.

  As shown in FIG. 6, the heat insulating materials 3... Configured as described above are arranged at intervals in the wall surface direction (horizontal direction) in the wall body 1 constituting the outer wall. Specifically, it is arranged so as to be located near the corner of the indoor space 31. In this case, the length of the hollow portion 10... In each heat insulating material 3 .. is different for each heat insulating material 3. In addition, the other part in the wall 1 is filled with the usual heat insulating material in which the cavity part 10 ... is not formed.

  As shown in FIGS. 1 and 4, the inner wall member 7 of the wall body 1 is formed side by side with openings 30... Corresponding to the open ports 14 of the hollow portions 10. As a result, the indoor space 31 and the hollow portion 10... Communicate with each other.

  In the above-described configuration, the floor impact sound to be sound-absorbed generated on the upper floor is propagated to the indoor space 31 on the lower floor, and the sound wave forming the main component of the floor impact sound is transmitted from the opening 30. When entering the hollow portion 10 of the heat insulating material 3..., It is reflected by the closed end of the vertical portion 11. Just shift. Therefore, the phase of the outgoing wave is shifted by 180 degrees with respect to the incident wave, and both can cancel each other and absorb the floor impact sound that is the object of sound absorption.

  Moreover, since the length of the cavity part 10 ... differs for every some heat insulating material 3 ... provided in the wall 1, the floor impact sound of a wide frequency band can be absorbed.

  The present invention is not limited to the above embodiment, and it is needless to say that many modifications and changes can be made to the above embodiment within the scope of the present invention. For example, the lengths of the hollow portions 10 in the heat insulating material 3 are not only substantially equal, but may be different as shown in FIG. In this case, it is possible to absorb floor impact sound in a wide frequency band with one heat insulating material 3.

  Moreover, what is necessary is just to form several hollow part 10 ... in the heat insulating material 3 along the wall surface direction of the wall 1, and not only forming in parallel mutually along an up-down direction, but as shown, for example in FIG. Alternatively, they may be formed parallel to each other along the horizontal direction, or may be formed so that the open ports 14 are positioned in a staggered manner as shown in FIG. In this case, the openings 30... Of the wall body 1 are not arranged side by side but are formed in a vertical arrangement or a staggered pattern.

  Furthermore, as the heat insulating material 3, it is not always necessary to assemble the divided members 20 and 21 having the cavity constituting portion 22, and the hollow portion 10 ·· is hollowed out from a simple substantially rectangular parallelepiped heat insulating material. It may be. Further, the shape of the hollow portion 10 is not limited to a substantially circular cross section, and may be, for example, a substantially rectangular cross section or a substantially square cross section. Further, as shown in FIG. 10, for example, as shown in FIG. 10, the hollow portion 10... Penetrates the vertical portion 11 .. vertically so that not only the upper end of the vertical portion 11. It may be configured to be closed. In this case, it is possible to easily adjust the length of the hollow portion 10... By adjusting the length of the plug body 35.

It is a longitudinal section in the sound insulation wall structure concerning one embodiment of this invention. It is the transverse cross section similarly. It is a longitudinal cross-sectional view of a heat insulating material. It is a front view which shows the example of arrangement | positioning of the cavity part in a heat insulating material. It is a disassembled perspective view of a heat insulating material. It is a schematic cross-sectional view which shows the example of arrangement | positioning of the heat insulating material in a wall. It is a front view which shows the other example of arrangement | positioning of the cavity part in a heat insulating material. It is a front view which shows another example of arrangement | positioning of the cavity part in a heat insulating material. It is a front view which shows another example of arrangement | positioning of the cavity part in a heat insulating material. It is a longitudinal cross-sectional view of another heat insulating material.

Explanation of symbols

  1 .. Wall body 3.. Insulating material 10.. Cavity part 14 ... Open port 20, 21 ... Dividing member 22 ... Cavity component part 30 ... Opening 31 ... Indoor space

Claims (7)

On the heat insulating material (3) filled in the wall (1), a sound-absorbing cavity (10) with one end open and the other end closed is formed along the wall surface direction of the wall (1). Sound insulation wall structure characterized by that. In the wall (1), an opening (30) corresponding to the opening (14) on one end side of the hollow portion (10) is formed, and the indoor space (31) and the hollow portion are formed. (10) The sound insulation wall structure according to claim 1, wherein: The sound insulation wall structure according to claim 1 or 2, wherein a plurality of hollow portions (10)... Having different lengths or substantially equal lengths are formed in the heat insulating material (3). The sound insulation wall structure according to any one of claims 1 to 3, wherein the wall body (1) is filled with a plurality of the heat insulating materials (3) at intervals in the wall surface direction. A heat insulating material (3) filled in the wall body (1), wherein one end side is opened and the other end side is closed along a wall surface direction of the wall body (1). A heat insulating material characterized by being formed. A plurality of divided members (20) and (21) having a hollow component portion (22) having a shape obtained by vertically dividing the hollow portion (10)... Are aligned with the respective hollow component portions (22) and (22). The heat insulating material according to claim 5, which is assembled. The heat insulating material according to claim 5 or 6, wherein a plurality of hollow portions (10) are formed having different lengths or substantially equal lengths.