JPH1066451A - Plantable sound-absorbing wall - Google Patents

Abstract

(57) [Summary] [Problem] To provide a sound-absorbing wall that has high sound-absorbing efficiency while having a sound-insulating effect, and that can be planted on a wall surface. A unit is formed by partitioning a back plate having a U-shaped cross section and a rib formed on a back side and projecting inward in a lateral direction at appropriate intervals, and arranging the units in square or rhombic sections in a matrix direction. Each of these sections was arbitrarily provided with a planting structure filled with artificial soil or a sound absorbing structure filled with a sound absorbing material. In the planting structure, a tray for receiving water having a water inlet on the bottom of the section was provided, a water retention material was laminated on the tray, and an artificial soil was filled on the water retention material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound-absorbing wall which can be planted while having an extremely good sound-absorbing or sound-proofing effect, which is used for a side wall of a motorway or the like.

[0002]

Conventionally, various means for greening the side wall of a road by planting have been developed. For example, the inventor described a “plantable wall structure” as a configuration for planting on a wall (Japanese Patent Application No. 6-93056), and a “planting unit shelf for greening” as a shelf to be stored inside the wall ( Japanese Patent Application No. 6
No. 93058). These are intended for simple wall greening while maintaining the sound insulation effect.

Further, as another configuration, a technique relating to a planting wall and a planting container used for the same is disclosed (Japanese Patent Application No. Hei 7-188105). This technology has a configuration in which one or a plurality of planting containers are housed in a greening unit having a sound insulation function, and achieves greening of a wall surface while taking measures against noise.

[0004] By the way, it is desired to minimize the leakage of noise to the outside on the side wall of an automobile-only road, etc. However, if it is a concrete wall, the sound insulation is possible, but it is not configured to absorb the sound itself. It is reflected and becomes rather loud on the road side. Further, even when the wall has a sound absorbing structure, reflection of noise cannot be completely avoided, and a wall of this type having good sound absorbing efficiency has been conventionally demanded. That is, even if 100% sound absorption or sound insulation cannot be achieved, it is extremely important to take a high-effect noise countermeasure.

[0005] In view of these conventional needs, the present inventors have provided a sound-absorbing wall which has high sound-absorbing efficiency while having a sound-insulating effect and can be planted on a wall surface. It is the purpose.

[0006]

According to the present invention, in order to achieve the above object, a rear plate having a U-shaped cross section and having ribs protruding inward in the lateral direction of the rear surface is divided at appropriate intervals. A unit was formed. Then, this unit is formed by combining a plurality of horizontal plates and vertical plates to form square or rhombic sections in a matrix direction, and each of these sections is a planting structure filled with artificial soil or a sound absorbing structure filled with a sound absorbing material. Is arbitrarily provided. By forming the rib, an air layer is secured on the inside of the back surface of the back plate by an amount corresponding to the height of the rib, and the sound absorbing effect can be further enhanced. By combining the horizontal plate and the vertical plate, a plurality of sections can be formed in the matrix direction, but by freely setting the combination angle of the horizontal plate and the vertical plate, it is possible to incline the place where the rear plate is installed. Even when there is, the horizontal plate can be set along the slope, and the vertical plate can be installed in the vertical direction. Since each section has a configuration in which a planting structure or a sound absorbing structure is arbitrarily selected, greening by planting becomes possible while performing sound absorption. Further, since the horizontal plate and the vertical plate form independent grids, they also have a function of dispersing the applied load.

[0007] As an optional means, a sound absorbing layer is provided on the entire surface on the back side of each section so as to be in contact with the tip of the rib.
At the same time as enhancing the sound absorbing effect, the heat insulating effect is also exhibited depending on the structure of the sound absorbing layer.

As a concrete planting structure, a tray for receiving water is provided on the bottom of the section, a water retention material is laminated on the tray, and an artificial soil is filled on the water retention material.
In this configuration, the water receiver efficiently holds the water supply to the plant, and at the same time, the water retention material holds appropriate water. Also, when installed on an inclined surface, water is secured in each section by the presence of the tray. On the other hand, in the sound absorbing structure, a water retaining material was provided in a frame shape along the section, and the sound absorbing material was filled inside the water retaining material. In this configuration, the frame-shaped water retention material can appropriately retain water for planting, make the roots sufficiently stretched, and the sound absorbing material filled inside absorbs external sound. The frame-shaped water retention material has a role of gradually moving the contained water in the direction of gravity. Further, the horizontal plate and the vertical plate are provided with a number of small holes for water passage and ventilation.

[0009]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of a soundproof wall body showing the present embodiment. Reference numeral 1 denotes a back plate which constitutes a main body of a skeleton of the wall body and further functions as a housing for accommodating a plurality of containers described later. As shown in FIG. 2, a rib 1a protruding inward is provided in the center in the lateral direction, and has a U-shaped cross section. Further, a falling edge 1b and a rising edge 1c are provided at the upper and lower ends. 2 is a side plate,
Reference numeral 3 denotes an intermediate plate for dividing the lateral direction of the back plate 1 into appropriate sections to prevent deformation. The back plate 1, the side plates 2, and the intermediate plate 3 form the entire skeleton.

In the present embodiment, each space defined by the back plate 1, the side plates 2, and the intermediate plate 3 has six rows and three columns.
A grid for dividing into columns is fitted. The configuration of the lattice is not particularly limited as long as it can be divided into the set matrix, but as shown in FIG.
And the five vertical plates 5 are simple and lightweight. In addition, the combination of the horizontal plate 4 and the vertical plate 5 forms a slit at a position where they are combined with each other, and if each slit is assembled, the shape of each section can be freely set from a square to a rhombus. That is, when the place where the back plate 1 is installed is inclined, the side plate 2 and the intermediate plate 3 need to be provided vertically in order to guarantee the strength of the building, but if the section is square, it is housed in each unit. Can not do. However, if the horizontal plate 4 and the vertical plate 5 are assembled as described above, the horizontal plate 4 can be made to correspond to the inclination of the rear plate 1, and at the same time, the vertical plate 5 becomes the side plate 2 and the intermediate plate 3.
Can be provided vertically. Each of the horizontal plate 4 and the vertical plate 5 is provided with a plurality of small holes 6.
The function of these small holes 6 is for water passage and ventilation for planting, and for sound absorption to facilitate passage of sound. In addition, each section formed by the horizontal plate 4 and the vertical plate 5,
A planting structure or a sound absorbing structure is applied as described later.

FIG. 4 shows an AA of an apparatus for planting and sound absorption.
FIG. 7 is a sectional view taken along a line. Reference numeral 7 denotes a sound absorbing material provided on the front surface of the back of the horizontal plate 4 and the vertical plate 5, provided in contact with the rib 1 a, and an air layer having the height of the rib 1 a is formed. Also,
The horizontal plate 4 and the vertical plate 5 are also assembled at positions where they contact the sound absorbing material 7. Reference numerals 8a, 8b, and 8c denote sections partitioned by horizontal plates and vertical plates 5.5, respectively, which are used as planting rooms or sound absorbing rooms. In the present embodiment, the section 8b
Is used as a planting room, and the sections 8a and 8c are used as sound absorbing rooms. A tray 9 having a water inlet for receiving water is provided on the lower surface of the section 8b, and a water retaining material 10 for retaining water is provided thereon. As the water retaining material 10, a non-woven fabric having high water absorbency is used by lamination, but is not particularly limited as long as it is a material capable of securing water absorbency. The sections 8a and 8c functioning as soundproof rooms are filled with a sound absorbing layer 11 that exhibits the same function as the sound absorbing material 7. As the sound absorbing material 7 or the sound absorbing layer 11, glass wool generally used for sound absorption or sound insulation is used. However, the material does not need to be limited to this, and as long as the sound-absorbing material 7 or the sound-absorbing layer 11 can be easily formed and a reliable effect can be expected, it can be used in place of glass wool.

The sound absorbing layer 11 is filled in a water retaining material frame 12 formed in a frame shape for each section. The reason for doing this is to increase the water retention of the planting room,
This is because when there is planting in sections that are continuous vertically and horizontally, their roots are sufficiently stretched. Reference numeral 13 denotes an artificial soil, which serves as a plant planting base. The structure of the artificial soil is also not particularly limited, but it is preferable that the structure has the contradictory functions of water retention and water permeability or air permeability. In the present embodiment, a mixture of granular cotton composed of polyester fiber and chip-shaped bark material is used. However, if the soil is not easily washed away by rainwater or the like, it is of course possible to substitute another configuration. Note that the sound absorbing material 7 is covered with the protective film 14 to prevent the sound absorbing material 7 from containing water to reduce the sound absorbing effect. As the sound absorbing material covered with the protective film 14, in this embodiment, glass wool having a thickness of about 30 mm is used, but the numerical value and the material are not limited thereto. Reference numeral 15 denotes a lid for each of the sections 8a, 8b, and 8c, which is for holding down the contents so that they do not pop out. Since the lid 15 needs to ensure ventilation and sound transmission, a large number of small holes (not shown) are provided when a metal plate or a synthetic resin plate is used. On the other hand, if the material of the lid 15 can secure ventilation and sound,
It goes without saying that the present invention can be applied to a metal mesh or a synthetic resin net. More preferably, planting can be facilitated by being detachable in units of sections or in units of a plurality of sections, and a planting hole 16 can be formed in the center of each section as shown in FIG. It is convenient to adopt a configuration that can be divided into two.

According to the above embodiment, it is possible to provide a planting or sound absorbing function for each arbitrary section.
Further, a sound absorbing layer 14 is arranged on the front side behind the section, and an air layer 17 is further formed on the back side, so that sound incident from the front is efficiently absorbed by the sound absorbing material, and It became a configuration that can absorb sound while allowing planting.

By the way, it is possible to freely assign a planting structure or a sound absorbing structure to each section. For example, it is possible to form a checkerboard-like or lattice-like pattern. A further visual effect can be expected. The inventor of FIGS. 5 and 6
As shown in the above, the sound absorbing function was measured using the shaded portion in each section as a sound absorbing structure and the white section as a planting base. FIG. 7 shows a planting base before planting everything, and FIG. 8 shows a case where planting was actually carried out in any of the sections, and the sound absorbing function was measured in the same manner.

[Table 1] As a result, despite the fact that the center frequency of the 1/3 octave band was measured relatively finely in the audible range, a very good sound absorbing function was exhibited in all frequency ranges. Especially,
200 Hz and 2 that people find most unpleasant as noise
Good results were also obtained at kilohertz. This suggests that, in the structure of the present embodiment, the sound absorbing effect can be maintained almost unchanged even if each section is arbitrarily a planting structure or a sound absorbing structure. In particular, the sound absorbing effect of glass wool or a planting base using artificial soil can be achieved in almost the same way. The goal is to be able to achieve about the same degree.

In this embodiment, the case where a structure for planting and sound absorption is provided on one side has been described. However, if two sets of this type are used and the back plates are overlapped with each other, planting on both sides is possible. Needless to say, sound absorption and sound absorption can be achieved, and the application is further expanded.

[0016]

According to the present invention, since the sound absorbing wall having the above structure is employed, a planting structure or a sound absorbing structure can be arbitrarily adopted for each section, and a very good sound absorbing effect can be obtained. It becomes possible. In particular, since an air layer is formed by providing ribs, and a sound absorbing layer is further provided on the entire surface, and a planting structure or a sound absorbing structure is provided outside the air layer, a high sound absorbing function can be achieved. The presence of the back plate can also prevent noise from leaking to the back side, so that it can be used as a wall for sound absorption as well as sound absorption. In addition, the air layer and the sound-absorbing layer play a role of heat insulation, so that even when solar heat is applied from the back, it is possible to prevent the plants from weakening due to radiant heat due to burning etc. Can be suppressed.

[Brief description of the drawings]

FIG. 1 is a front view of a sound absorbing wall according to the present invention.

FIG. 2 is a side view of the rear plate.

FIG. 3 is a perspective view showing a combination of a horizontal plate and a vertical plate.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is an allocation front view of a planting structure and a sound absorbing structure.

FIG. 6 is another layout front view of the same.

FIG. 7 is a front view of the same and still another allocation.

FIG. 8 is another layout front view of the same.

[Explanation of symbols]

 Reference Signs List 1 back plate 1a rib 1b falling 1c rising 2 side plate 3 intermediate plate 4 side plate 5 vertical plate 6 small hole 7 sound absorbing material 9 tray 10 water retaining material 11 sound absorbing layer 12 water retaining material frame 13 artificial soil 14 protective film 15 lid 16 plant Planting hole 17 Air layer

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masatoshi Kubo 2-3-3 Kobashiyama, Tarumi-ku, Kobe-shi, Hyogo (72) Inventor Takahiro Yanaka 3-5-2, Chuo, Joto-ku, Osaka-shi Asanuma Kuminoe Single Dormitory (72) Inventor Akifumi Moriwaki 1-15-39-304, Nishi-Shibukawa, Kusatsu-shi 2041

Claims (6)

[Claims] 1. A unit is formed by partitioning a back plate having a U-shaped cross section and having ribs protruding inward in the back lateral direction at an appropriate interval, and arranging the units in a square or rhombic section in a matrix direction. A planting structure filled with artificial soil or a sound absorbing structure filled with a sound absorbing material is arbitrarily provided in each of these sections. 2. The plantable sound absorbing wall according to claim 1, wherein the partition is formed by combining a plurality of horizontal plates and vertical plates. 3. The plantable sound-absorbing wall according to claim 1, wherein a sound-absorbing layer is provided on the entire surface at the back of each section so as to be in contact with the tip of the rib. 4. The planting structure according to claim 1, wherein a water receiving tray having a water inlet is provided on the bottom surface of the section, a water retaining material is laminated on the tray, and artificial water is filled on the water retaining material. 2. The plantable sound-absorbing wall according to 1. 5. The sound absorbing structure according to claim 1, wherein a water retaining material is provided in a frame shape along the section, and the inside of the water retaining material is filled with the sound absorbing material.
The planting sound-absorbing wall described. 6. The plantable sound absorbing wall according to claim 1, wherein the horizontal plate and the vertical plate are provided with a large number of small holes for water passage and ventilation.