JP2023038835A - Noise reduction structure - Google Patents

Abstract

To provide a noise reduction structure capable of reducing noise from a lateral part of a building.SOLUTION: A noise reduction structure 20 includes a reflection unit 50A that is provided in a side wall surface of a veranda 12 in a building 10, inclines so as to expand from a window surface toward a tip end of the veranda 12, and can reflect noise from the outside to the outside of the building 10.SELECTED DRAWING: Figure 1

Description

The present invention relates to noise reduction structures.

Patent Literature 1 listed below describes a sound insulating veranda structure in which the veranda ceiling surface is provided with a reflecting surface that reflects incoming noise sound waves. In this sound insulating veranda structure, by setting the inclination angle of the reflecting surface with respect to the propagation direction of the direct noise wave to 90 degrees or more, the noise incident on the window opening of the building is reduced.

JP 2012-211509 A

In the sound insulating veranda structure of Patent Document 1, noise is reflected to the outside of the building. However, since the reflector is provided only on the veranda ceiling surface, the effect of suppressing noise from below the building is high, but the effect of reducing noise from the side of the building is limited.

For example, the time for which noise is incident on a building from a vehicle traveling on the road in front of the building is longer than the time for which noise is incident while the vehicle is traveling directly under the building. For this reason, reducing noise from the sides of a building rather than from the bottom of a building may result in a higher noise reduction effect over time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a noise reduction structure capable of reducing noise from the sides of a building in consideration of the above facts.

The noise reduction structure of claim 1 is provided on the side wall surface of a veranda in a building, and is inclined so as to spread from the window surface toward the tip of the veranda, and can reflect externally incident noise to the outside of the building. It has a reflective part.

In the noise reduction structure according to claim 1, the side wall surface of the veranda is provided with a reflecting portion capable of reflecting externally incident noise to the outside of the building. Reflecting portions on the side walls of the veranda reflect noise from the sides. As a result, for example, the effect of reducing noise caused by the passage of vehicles running on the front road extending from one side of the building to the other side via the foot of the building is high.

Moreover, the reflecting portion is inclined so as to expand from the window surface toward the tip of the veranda. For this reason, compared with the configuration in which the reflecting portion is parallel to the side wall surface of the veranda, it is easier to reduce noise from the front side of the veranda. In addition, the view from the room is less likely to be obstructed, and the lighting into the room is also less likely to be obstructed.

A noise reduction structure according to claim 2 is the noise reduction structure according to claim 1, wherein the reflection part is formed on the ceiling surface of the veranda in addition to the side wall surface.

In the noise reduction structure of claim 2, the ceiling surface and the side wall surface of the veranda are provided with the reflectors. A reflector on the ceiling surface of the veranda reflects noise from below. Therefore, in the noise reduction structure of claim 2, noise from the side and below can be reflected. As a result, compared to a structure in which only the reflector is provided only on the ceiling surface or only on the side wall surface of the veranda, the noise reduction effect is great.

The noise reduction structure according to claim 3 is the noise reduction structure according to claim 1, wherein the louver is formed by a plurality of louvers inclined so as to spread from the window surface toward the tip of the veranda. is.

In the noise reduction structure of claim 3, the reflector is formed by a plurality of inclined blades. That is, the reflective portion is formed separately.

For this reason, if each wing plate is arranged in an “inclined state” with respect to the side wall surface, for example, even if these wing plates are “arranged parallel to each other” with respect to the side wall surface, the veranda can be seen from the window surface. It is possible to form a reflective portion that is inclined so as to widen toward the tip of the . This makes it possible to save space for the sound absorbing mechanism compared to a structure in which a single large surface is used as a reflecting portion.

The noise reduction structure according to claim 4 is the noise reduction structure according to claim 2, wherein the reflection part on at least one of the ceiling surface and the side wall surface spreads from the window surface toward the tip of the veranda. A louver formed by a plurality of slanted blades.

In the noise reduction structure according to claim 4, the reflecting portion is formed by a plurality of inclined blades. That is, the reflective portion is formed separately.

Therefore, if each louver is arranged in an "inclined state" with respect to the ceiling surface or the side wall surface, for example, these louvers can be arranged "parallel to each other" with respect to the ceiling surface or the side wall surface. Also, it is possible to form a reflective part inclined so as to spread from the window surface toward the tip of the veranda. This makes it possible to save space for the sound absorbing mechanism compared to a structure in which a single large surface is used as a reflecting portion.

A noise reduction structure according to claim 5 is the noise reduction structure according to claim 1, wherein the reflecting portion is formed in a series of steps.

In the noise reduction structure according to claim 5, the reflecting portion is formed in a series of steps. Therefore, the sound absorbing mechanism can be space-saving compared to a structure in which a single large surface is used as a reflecting portion.

In the noise reduction structure according to claim 6, in the noise reduction structure according to claim 2, the reflecting portion on at least one of the ceiling surface and the side wall surface is formed in a series of steps.

In the noise reduction structure according to claim 6, the reflecting portion is formed in a series of steps. Therefore, the sound absorbing mechanism can be space-saving compared to a structure in which a single large surface is used as a reflecting portion.

ADVANTAGE OF THE INVENTION According to this invention, the noise from the side of a building can be reduced.

(A) is a side cross-sectional view showing an example in which a noise reduction structure is formed on the side wall surface of a veranda, and (B) is a cross-sectional view taken along the line BB in (A). (A) is a side cross-sectional view showing an example in which noise reduction structures are formed on the side wall surface and the ceiling surface of a veranda, and (B) is a cross-sectional view taken along line BB in (A). (A) is a side cross-sectional view showing an example in which a reflecting surface is formed by bending, (B) is a cross-sectional view taken along line BB in (A), and (C) is a reflecting surface assembled with a plurality of surface materials. It is a partially enlarged plan view showing an example in which a portion is formed. (A) is a side cross-sectional view showing an example in which a sound absorbing portion is formed in addition to a reflecting portion, and (B) is a cross-sectional view taken along line BB in (A). (A) is a side cross-sectional view showing an example in which the noise reduction structure is formed of louvers, and (B) is a cross-sectional view taken along line BB in (A). It is a sectional side view which shows the modification which formed the noise reduction structure with the louver. (A) is a plan view showing an example in which the noise reduction structure is formed by curved louvers, and (B) is a plan view showing an example in which sound absorbing portions are formed in the louvers. (A) is a side cross-sectional view showing an example in which the noise reduction structure is formed in a stepped shape, and (B) is a cross-sectional view taken along the line BB in (A). FIG. 10 is a plan view showing a state in which a sound absorbing portion is formed in addition to the reflecting portion in an example in which the noise reduction structure is formed in a stepped shape; (A) is a side cross-sectional view showing a modification in which the noise reduction structure is formed stepwise, and (B) is a cross-sectional view taken along line BB in (A).

Hereinafter, noise reduction structures according to embodiments of the present invention will be described with reference to the drawings. Components shown using the same reference numerals in each drawing mean the same components. However, unless otherwise specified in the specification, each component is not limited to one, and a plurality of components may exist.

In addition, descriptions of configurations and reference numerals that are duplicated in each drawing may be omitted. It should be noted that the present invention is not limited to the following embodiments, and can be carried out with appropriate modifications, such as omitting the configuration or replacing it with a different configuration, within the scope of the purpose of the present invention.

The directions indicated by arrows X and Y in each figure are directions along the horizontal plane and are orthogonal to each other. Also, the direction indicated by the arrow Z is the direction along the vertical direction (vertical direction). It is assumed that the directions indicated by arrows X, Y, and Z in each figure match each other.

<Noise reduction structure>
1A and 1B show an example of a noise reduction structure 20 according to an embodiment of the invention. The noise reduction structure 20 is applied to the building 10 and is noise suppression means intended to suppress noise from the sides of the building 10 . The noise reduction structure 20 is configured including a partition member 40 .

(building)
The use of the building 10 is not particularly limited, but the building 10 in this embodiment is used as an apartment. And the noise reduction structure 20 is applied to the veranda 12 of the building 10 .

In front of the veranda 12 of the building 10, an unillustrated arterial road (a national expressway, a general national road, a prefectural road, etc.) passes. The longitudinal direction (X direction) of the veranda 12 is arranged along the direction of the lane on the highway. In addition, various roads other than the main road, train tracks, etc. may pass through the front of the building 10 .

The veranda 12 is an outdoor space separated from the indoor space R of the building 10 by the glass window 14 . The glass window 14 is a sweep window for entering and exiting the veranda 12 from the indoor space R, and is arranged along the longitudinal direction of the veranda 12 . A slab 16 is formed outside the glass window 14 .

The slab 16 is a cantilevered slab protruding to the outside of the building 10, is provided for each floor of the building 10, and forms the floor surface of the veranda 12 on each floor. A handrail 16A is provided at the tip of the slab 16. - 特許庁

In this embodiment, an example is shown in which two dwelling units are arranged in the portion facing the main road as the building 10, but the number of dwelling units arranged in the portion facing the main road is particularly limited. isn't it.

(Reflector provided on side wall surface)
As shown in FIG. 1B, the veranda 12 is partitioned by partition members 40 . The partition member 40 is installed at the boundary between the adjacent dwelling units, divides the veranda 12 into a plurality of exclusive use portions, and forms side walls of the exclusive use portions. A "dedicated area" is an area that is used on a daily basis only by the residents of one dwelling unit.

The partition member 40 has two vertical portions 42 and 44 and an inclined portion 46 . The vertical portions 42 and 44 and the inclined portion 46 are each formed using a nonflammable plate material such as a calcium silicate plate or a flexible plate.

The vertical part 42 is a part formed along the vertical direction between the upper and lower slabs 16 and arranged on the outer wall surface side of the building 10 . In addition, the vertical portion 42 is arranged along the lateral direction (Y direction) of the veranda 12 and is longer than the vertical portion 44 in the Y direction.

The vertical portion 44 is a portion formed along the vertical direction between the upper and lower slabs 16 similarly to the vertical portion 42 , and is arranged on the outer wall surface side of the building 10 . Further, the vertical portion 44 is spaced apart from the vertical portion 42 in the longitudinal direction of the veranda 12 and arranged parallel to the vertical portion 42 .

The inclined portion 46 is a portion that connects the tip of the vertical portion 42 and the tip of the vertical portion 44 . The sloped portion 46 is a portion that slopes from the window surface of the glass window 14 toward the tip of the veranda 12 with respect to the connected vertical portion 44 between the upper and lower slabs 16 .

Here, "from the window surface of the glass window 14 toward the tip of the veranda 12" indicates going from the inside to the outside of the veranda 12 in the depth direction (Y direction). The term “slanted to expand” means that the veranda 12 is inclined from the inside (center side of the veranda 12) to the outside (vertical portion 44 side) in the longitudinal direction (X direction) of the veranda 12. indicates

The vertical portions 42 , 44 and the sloped portion 46 form the side walls of the dedicated portion of the verandah 12 . The inclined portion 46 is formed using a nonflammable plate material such as a calcium silicate plate or a flexible plate, as described above. A reflecting member 50A that forms a reflecting surface as a reflecting portion is fixed to the surface of the inclined portion 46 . The reflecting member 50A is a surface material that is formed of a heavy material such as a metal material such as aluminum or stainless steel, and that forms a smooth and hard reflecting surface. The material itself forming the inclined portion 46 may be the material forming the reflecting member 50A. In this case, the inclined portion 46 forms a reflecting surface, which is a reflecting portion.

With this configuration, as indicated by an arrow N1 in FIG. 1(B), at least a portion of incident sound entering the reflecting member 50A from the side is reflected to the outside.

A space V2 formed between the vertical portions 42, 44 and the inclined portion 46 can be used as a space for installing equipment and piping.

The vertical portions 42 and 44 and the inclined portion 46 are preferably fixed to a base material formed using a metal material such as aluminum or steel, or fitted in a four-sided frame or the like. As a result, rigidity to the extent that the partition member 40 is not deformed or scattered when it is blown by the wind can be ensured.

(Reflector provided on side wall surface and ceiling surface)
As shown in FIGS. 2A and 2B, the noise reduction structure 20 includes a reflecting member 50B formed on the ceiling surface of the veranda in addition to the reflecting member 50A formed on the side wall surface of the veranda 12. can also be formed.

In this embodiment, on the veranda 12, a ceiling member 30 is provided below the slab 16 forming the floor surface of the upper floor. The ceiling member 30 has a horizontal portion 32 and an inclined portion 34 . The horizontal portion 32 and the inclined portion 34 are each formed using a noncombustible plate material such as a calcium silicate plate.

The horizontal portion 32 is a portion formed along the horizontal direction below the slab 16 and is arranged on the outer wall surface side of the building 10 . On the other hand, the inclined portion 34 is formed below the slab 16 so as to be inclined upward with respect to the horizontal portion 32 , and is arranged from the tip of the horizontal portion 32 to the tip of the slab 16 . Note that the inclined portion 34 is inclined so as to expand from the window surface of the glass window 14 toward the tip of the veranda 12 .

Here, "from the window surface of the glass window 14 toward the tip of the veranda 12" indicates going from the inside to the outside in the depth direction (Y direction) of the veranda 12, as described above. The phrase "arranged at an angle so as to expand" indicates a state in which the veranda 12 is inclined from the bottom to the top in the up-down direction (Z direction).

The lower surfaces of the horizontal portion 32 and the inclined portion 34 form the ceiling surface of the veranda 12 . The inclined portion 34 is formed using a nonflammable plate material such as a calcium silicate plate or a flexible plate, as described above. A reflecting member 50B that forms a reflecting surface as a reflecting portion is fixed to the surface of the inclined portion 34 . The reflecting member 50B is a surface material that is formed of a heavy material such as a metal material such as aluminum or stainless steel, and that forms a smooth and hard reflecting surface. Note that the material itself forming the inclined portion 34 may be the material forming the reflecting member 50B. In this case, the inclined portion 34 forms a reflecting surface, which is a reflecting portion.

With this configuration, as indicated by an arrow N2 in FIG. 2(A), at least a portion of incident sound entering the reflecting member 50B from below is reflected to the outside.

A space V1 formed between the slab 16 forming the floor surface of the upper floor and the ceiling member 30 can be used as a space for installing equipment and piping.

Note that the horizontal portion 32 and the inclined portion 34 are fixed to a base material formed using a metal material such as aluminum or steel, or fitted in a four-sided frame or the like, similarly to the vertical portions 42, 44 and the inclined portion 46. It is preferable to install it by inserting it. Thereby, when the ceiling member 30 is blown by the wind, it is possible to secure the rigidity to the extent that the ceiling member 30 is not deformed or scattered.

<Action and effect>
In the noise reduction structure 20 according to the embodiment of the present invention, as shown in FIG. there is

The reflecting member 50A on the side wall surface of the veranda 12 reflects noise from the side as indicated by the arrow N1. As a result, for example, the effect of reducing noise caused by the passage of vehicles traveling on the front road extending from one side of the building 10 to the other side via the foot of the building 10 is high.

Moreover, the reflecting portion 50 is inclined so as to expand from the window surface of the glass window 14 toward the tip of the veranda 12 . For this reason, noise from the front of the veranda can be easily reduced as compared with the configuration in which the reflecting portion is parallel to the side wall surface of the veranda 12 . In addition, the view from the indoor space R is less likely to be obstructed, and the daylighting into the indoor space R is less likely to be obstructed. Furthermore, since the reflecting area can be increased as compared with the configuration in which the reflecting portion is parallel to the side wall surface of the veranda 12, the noise reduction effect can be enhanced.

Further, as shown in FIGS. 2A and 2B, if the ceiling surface of the veranda is provided with the reflecting member 50B, noise from below can be reflected as indicated by the arrow N2. can. For this reason, compared with the structure in which only the reflector is provided only on the ceiling surface of the veranda or only on the side wall surface, the noise reduction effect is large.

<Deployment example of noise reduction structure>
A deployment example of the noise reduction structure will be described below. In this specification, the deployment example described as being provided on both the side wall surface and the ceiling surface may be provided only on the side wall surface. Moreover, the development example described as being provided only on the side wall surface may be provided on both the side wall surface and the ceiling surface.

(Development example of the shape of the reflecting part)
The reflecting member 50A shown in FIG. 1 and the reflecting member 50B shown in FIG. 2 are fixed to the inclined portion 46 and the inclined portion 34, respectively, to form a "planar (in other words, non-curved) reflecting surface". . On the other hand, the reflecting members 60A and 60B shown in FIGS. 3A and 3B form a "curved reflecting surface" as a reflecting portion.

The reflecting surfaces of the reflecting members 60A and 60B are curved surfaces that are inclined so as to expand from the window surface of the glass window 14 toward the tip of the verandah 12 . Thus, the reflector in the present invention may be curved.

In FIG. 3B, the reflecting member 60A is one member fixed to the side surface of the partition plate 18, and the side surface facing the longitudinal direction (X direction) of the veranda 12 forms a reflecting surface as a reflecting portion. However, embodiments of the present invention are not limited to this.

For example, as shown in FIG. 3C, a plurality of face members may be attached to the side surfaces of the partition plate 18, and the face members facing the longitudinal direction (X direction) of the veranda 12 may form the reflecting member 60A. In this way, a configuration in which a plurality of face members are assembled to form a reflecting portion can be applied to each development example described below, in addition to the reflecting member 60B shown in FIG. 3(A).

With this configuration, as indicated by an arrow N3 in FIG. 3A, at least a portion of the incident sound that enters the reflecting member 60B from below is reflected to the outside. Further, as indicated by an arrow N4 in FIG. 3(B), at least a part of the sound incident on the reflecting member 60B from the side is reflected to the outside.

(Deployment example with a sound absorbing part)
The noise reduction structure 20 may be formed with a sound absorber. FIGS. 4A and 4B show reflecting members 62A and 62B forming planar reflecting surfaces as reflecting portions. The reflecting surfaces of the reflecting members 62A and 62B are inclined surfaces extending from the window surface of the glass window 14 toward the tip of the veranda 12 .

As shown in FIG. 4A, on the ceiling surface of the veranda 12 (the lower surface of the slab 16), a sound absorbing portion 64B is provided in a portion closer to the glass window 14 than the reflecting member 62B (inner side of the veranda in the depth direction). ing.

The sound absorbing part 64B is a plate-shaped sound absorbing member formed of, for example, punching metal or a porous material, and is arranged from the lower surface (horizontal surface) of the slab 16 to the outer wall surface (vertical surface) of the building 10. . Note that the sound absorbing portion 64B may be provided only on either the lower surface (horizontal surface) of the slab 16 or the outer wall surface (vertical surface) of the building 10 .

With this configuration, as indicated by an arrow N5 in FIG. 4A, at least a portion of incident sound that enters the reflecting member 62B from below is repeatedly reflected multiple times, enters the sound absorbing portion 64B, and is absorbed. Depending on the incident angle, the sound incident on the reflecting member 62B from below is reflected to the outside as indicated by an arrow N6.

Similarly, as shown in FIG. 4B, on the side wall surface of the veranda 12 (side surface of the partition plate 18), a sound absorbing portion 64A is provided in a portion closer to the glass window 14 than the reflecting member 62A.

The sound absorbing portion 64A is a plate-like sound absorbing member made of punching metal, for example, like the sound absorbing portion 64B. Note that the sound absorbing portion 64A may be provided only on either the side surface of the partition plate 18 or the outer wall surface of the building 10. FIG.

With this configuration, as indicated by an arrow N7 in FIG. 4B, at least part of incident sound that enters the reflecting member 62A from the side enters the sound absorbing portion 64A and is absorbed. It should be noted that, depending on the incident angle, the sound incident on the reflecting member 62A from the side is reflected to the outside as indicated by an arrow N8.

Note that such a sound absorbing portion 64A may be applied to the vertical portion 44 shown in FIG. Similarly, the sound absorbing portion 64B can also be applied to the horizontal portion 32 shown in FIG.

(Expansion example in which the reflector is formed by a louver)
In the embodiment shown using FIGS. 1 to 4, the reflecting portions formed on the side wall surface and the ceiling surface of the veranda 12 form one large surface, but the reflecting portion is divided into a plurality of parts. can also be formed.

For example, FIGS. 5A and 5B show louvers 66 and 68 as reflecting portions. As shown in FIG. 5A, the louver 66 is formed by a plurality of blades 66A. The wing plate 66A is a long flat plate member arranged so that its longitudinal direction coincides with the longitudinal direction (X direction) of the veranda 12 . Further, as shown in FIG. 5(B), the wing plates 66A are arranged substantially over the entire area between the partition plates 18 arranged on both sides of the veranda 12 in the X direction.

As shown in FIG. 5A, the wing plate 66A is arranged on the ceiling surface so as to extend from the window surface of the glass window 14 toward the tip of the veranda 12. As shown in FIG. In other words, the lower end portion of the blade plate 66A is arranged inside the veranda 12 in the depth direction, and the upper end portion is inclined so as to be arranged outside the veranda 12 in the depth direction.

The “ceiling surface” here means the vicinity of the upper slab 16 of the veranda 12 (the position closer to the upper slab than the lower slab).

A plurality of wing plates 66A are arranged side by side along the vertical direction (Z direction), each being inclined in this way. Although three blades 66A are shown in FIG. 5A, the number of blades 66A to be arranged is not particularly limited as long as it is two or more.

With this configuration, as indicated by arrow N9 in FIG. 5A, at least a portion of incident sound entering the louver 66 from below is reflected from the louver 66A to the outside. A plurality of blades 66A may be arranged side by side along the depth direction of the veranda 12 as shown in FIG.

Similarly, as shown in FIG. 5B, the louver 68 is formed by a plurality of blades 68A. The wing plate 68A is a long flat plate member arranged so that its longitudinal direction is aligned with the vertical direction (Z direction) of the veranda 12 . Further, as shown in FIG. 5A, the wing plate 68A is arranged between the upper and lower slabs 16 of the veranda 12. As shown in FIG.

As shown in FIG. 5B, the wing plate 68A is arranged on the side wall surface of the veranda 12 so as to extend from the window surface of the glass window 14 toward the tip of the veranda 12 at an angle. In other words, the inner end portion of the blade plate 68A is arranged inside the veranda 12 in the depth direction, and the outer end portion is inclined so as to be arranged outside the veranda 12 in the depth direction.

In addition, the "side wall surface" here means the vicinity of the partition plate 18 that partitions the veranda 12 between adjacent dwelling units (a portion within about 50 cm from the partition plate).

A plurality of blades 68A are arranged side by side along the depth direction (Y direction) of the veranda 12 in such a state that each of them is inclined. Although three blades 68A are shown in FIG. 5B, the number of blades 68A to be arranged is not particularly limited as long as it is two or more.

With this configuration, as indicated by arrow N10 in FIG. 5(B), at least a portion of incident sound entering the louver 68 from the side is reflected from the louver 68A to the outside.

(Modification 1)
A sound absorbing portion can also be formed when a louver is used to form a reflecting portion. For example, FIG. 7A shows a louver 70 formed using a plurality of blades 70A and a sound absorbing portion 72. FIG.

The wing plate 70A, which is the reflecting portion, is formed so as to be curved so as to protrude toward the outdoor side of the veranda 12. As shown in FIG. The sound absorbing portion 72 covers at least part of the partition plate 18 forming the side wall surface of the veranda 12 . Also, the sound absorbing portion 72 can be formed using the same material as the sound absorbing portions 64A and 64B described above.

By forming the curved blades as the reflecting portion, the incident sound incident on the louver 70 from the side has a large reflection angle, and is easily reflected toward the partition plate 18 side. Therefore, by providing the sound absorbing portion 72 in the partition plate 18, at least part of the incident sound entering the louver 70 from the side enters the sound absorbing portion 72 as indicated by the arrow N11 in FIG. Sound is absorbed.

It should be noted that it is not always necessary to use the reflecting portion formed by bending the blades in this way together with the sound absorbing portion. That is, in FIGS. 5 and 6, louvers 70 may be used instead of the louvers 66 and 68. FIG.

(Modification 2)
The sound absorbing portion can also be formed on the louvers forming the louvers. For example, a plurality of blades 74 forming a louver 76 shown in FIG. 7(B) each include a reflecting portion 74A and a sound absorbing portion 74B.

The reflecting portion 74A is formed on the front side of the wing plate 74 (the surface facing the central portion of the veranda 12 in the longitudinal direction), and the sound absorbing portion 74B is formed on the back side of the wing plate 74 (the surface facing the partition plate 18). formed. The sound absorbing portion 74B can be formed using the same material as the sound absorbing portions 64A and 64B described above.

By providing the reflecting portion 74A and the sound absorbing portion 74B on the wing plate 74, at least part of the sound incident on the louver 76 from the side enters the sound absorbing portion 74B, as indicated by the arrow N12 in FIG. 7B. sound is absorbed. Incidentally, the sound incident on the louver 76 from the side is reflected to the outside as indicated by an arrow N13 depending on the incident position and incident angle.

In the examples shown in FIGS. 5, 6, and 7, the louvers are used to divide the reflecting section. For this reason, for example, like the wing plate 68A shown in FIG. Even if they are arranged side by side, it is possible to form a reflective part inclined so as to spread from the window surface of the glass window 14 toward the tip of the veranda 12. - 特許庁

Similarly, if each louver is arranged in an "inclined state" with respect to the ceiling surface, like the louver 66A shown in FIG. 5A and FIG. Even if they are "arranged in parallel" in the depth direction, it is possible to form a reflective part inclined so as to expand from the window surface of the glass window 14 toward the tip of the veranda 12.例文帳に追加

Thus, if the reflecting portion is divided and formed, the space of the sound absorbing mechanism can be saved as compared with a structure in which a single large surface is used as the reflecting portion.

(Expansion example in which the reflective portion is formed in a stepped pattern)
As an embodiment in which the reflecting section is divided into a plurality of sections, a louver may be used as shown in FIGS. Even if the reflecting portion is formed stepwise, the sound absorbing mechanism can be made space-saving.

For example, in the example shown in FIG. 8A, a reflecting member 80 is provided on the ceiling surface of the veranda 12 (the lower surface of the upper slab 16). The reflecting member 80 has a plurality of reflecting surfaces 80A that are inclined so as to expand from the window surface of the glass window 14 toward the tip of the verandah 12 . The reflecting surfaces 80A that are adjacent to each other are arranged in a row in a stepped manner via the step surface 80B.

With this configuration, as indicated by arrow N14, at least a portion of incident sound incident on reflecting member 80 from the side is reflected from reflecting surface 80A to the outside.

Similarly, in the example shown in FIG. The reflecting member 82 has a plurality of reflecting surfaces 82A that are inclined so as to expand from the window surface of the glass window 14 toward the tip of the veranda 12 . The reflective surfaces 82A that are adjacent to each other are arranged in a row in a stepped manner via the step surface 82B.

With this configuration, as indicated by an arrow N15, at least a portion of incident sound that enters the reflecting member 82 from the side is reflected from the reflecting surface 82A to the outside.

In addition, as shown in FIG. 9, a sound absorbing portion 84 may be provided on the step surface 82B. The sound absorbing portion 84 can be formed using the same material as the sound absorbing portions 64A and 64B described above. By providing the sound absorbing portion 84 in the reflecting member 82, at least part of the incident sound incident on the reflecting member 82 from the side enters the sound absorbing portion 84 and is absorbed as indicated by the arrow N16 in FIG. Such a sound absorbing portion may be provided on the step surface 80B of the reflecting member 80 shown in FIG. 8(A).

(Modification)
In the examples shown in FIGS. 8A and 8B, the reflecting surfaces 80A and 82A are inclined so as to expand from the window surface of the glass window 14 toward the tip of the veranda 12, but the embodiment of the present invention It is not limited to this.

For example, like reflecting members 86 and 88 as reflecting portions shown in FIGS. 10A and 10B, the reflecting surface may not be inclined. Specifically, in the reflecting member 86 shown in FIG. 10A, a reflecting surface 86A along the vertical direction (Z direction) of the veranda 12 and a reflecting surface 86B along the depth direction (Y direction) of the veranda 12 alternately. are arranged in a row in a stepped manner.

In this configuration, the reflective surfaces 86A and 86B are connected in a stepped manner to form a reflective member 86 as a reflective portion that is inclined so as to spread from the window surface of the glass window 14 toward the tip of the veranda 12.

With this configuration, as indicated by arrow N16 in FIG. 10A, at least a portion of incident sound entering the reflecting member 86 from below is reflected from the reflecting surfaces 86A and 86B to the outside. In addition, the incident sound incident on the reflecting member 86 from below is reflected to the outside from one of the reflecting surfaces 86A and 86B depending on the incident angle.

Similarly, in the reflecting member 88 shown in FIG. 10B, reflecting surfaces 88A along the longitudinal direction (X direction) of the veranda 12 and reflecting surfaces 88B along the depth direction (Y direction) of the veranda 12 are alternately arranged. are arranged in a tiered fashion.

In this configuration, the reflective surfaces 88A and 88B are connected in a stepped manner to form a reflective member 88 as a reflective portion that is inclined so as to expand from the window surface of the glass window 14 toward the tip of the veranda 12.

With this configuration, as indicated by an arrow N17 in FIG. 10B, at least a portion of incident sound entering the reflecting member 88 from the side is reflected from the reflecting surfaces 88A and 88B to the outside. Further, incident sound incident on the reflecting member 88 from the side is reflected to the outside from one of the reflecting surfaces 88A and 88B depending on the incident angle.

As described above, the ``reflecting portion inclined so as to expand from the window surface toward the tip of the veranda'' in the present invention does not necessarily mean that the reflecting surface itself is inclined, and that the reflecting member including the reflecting surface is inclined. It's fine if you do.

10 Building 12 Veranda 14 Glass window (window)
50A reflecting member 50B reflecting member 60A reflecting member 60B reflecting member 62A reflecting member 62B reflecting member 66 louver 66A blade 68 louver 68A blade 70 louver 70A blade 76 louver 74 blade 74A reflector 80 reflector 80A reflector surface 82 reflector 82A reflecting surface 86 reflecting member 86A reflecting surface 86B reflecting surface 88 reflecting member 88A reflecting surface 88B reflecting surface

Claims (6)

A noise reduction structure provided on a side wall surface of a veranda in a building, and provided with a reflecting portion that is inclined so as to expand from a window surface toward the tip of the veranda, and that can reflect externally incident noise to the outside of the building. 2. The noise reduction structure according to claim 1, wherein the reflector is formed on the ceiling surface of the veranda in addition to the side wall surface. The reflecting part is
2. The noise reduction structure according to claim 1, wherein the louver is formed by a plurality of louvers inclined so as to expand from the window surface toward the tip of the veranda. The reflective portion on at least one of the ceiling surface and the side wall surface,
3. The noise reduction structure according to claim 2, wherein the louver is formed by a plurality of louvers inclined so as to widen from the window surface toward the tip of the veranda. 2. The noise reduction structure according to claim 1, wherein said reflecting portion is formed in a series of steps. 3. The noise reduction structure according to claim 2, wherein the reflecting portion on at least one of the ceiling surface and the side wall surface is formed in a series of steps.

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