JP2774075B2 - 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 an improvement of a soundproof wall installed on a side of a road or a railway.

[0002]

2. Description of the Related Art The above soundproof wall has a cross section of H
Generally, a panel such as a sound insulating panel or a sound absorbing sound insulating panel is dropped between pillars of a mold to form a sound insulating wall or a sound absorbing sound insulating wall. (In this specification, the term “sound insulation wall” includes both the sound insulation wall and the sound absorbing sound insulation wall.)
The soundproofing effect of such a conventional sound insulating wall is determined by its height, and it is necessary to increase the height of the sound insulating wall in order to improve the soundproofing effect.

[0003] However, increasing the height of the sound insulating wall causes problems such as obstruction of the surrounding sunshine. Therefore, as shown in Japanese Utility Model Laid-Open No. 3-108012 and Japanese Utility Model Laid-Open No. 1-138909, the upper end of the noise insulating wall is provided. There has been proposed a soundproof wall which aims to improve the soundproofing effect by installing the silencer cylinder horizontally without increasing the overall height so much.

However, the soundproof wall provided with such a sound deadening cylinder has the following problems. As shown in Japanese Utility Model Laid-Open No. 3-108012, a support for mounting a silencer is separately provided,
As shown in the publication, the noise reduction cylinder needs to be attached to the upper end of the sound insulating wall by a special fixing tool, so that the construction cost is increased and the construction workability is not good. Since a fiber-shaped sound absorbing material such as glass wool is used for the sound deadening cylinder, it is easily deteriorated by ultraviolet rays, wind and rain. If the sound insulating wall is destroyed due to an accident or the like, the sound deadening tube at the upper end thereof may fall, and particularly on an elevated road, the sound deadening tube falling on the ground may cause a secondary disaster.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and maintains the conventional advantage that the soundproofing effect can be improved without increasing the overall height so much. It is a first object of the present invention to provide a soundproof wall which is low in construction cost, has good construction workability, and is hardly deteriorated. It is a second object of the present invention to provide a soundproof wall in which the silencer does not fall even when the soundproof wall is destroyed due to an accident or the like.

[0006]

According to a first aspect of the present invention, an aluminum fiber is crimped on an upper end of a sound insulating wall formed by dropping a panel between columns having an H-shaped cross section. A muffler tube made of a molded aluminum sound absorbing material is installed horizontally with fitting portions formed on both end surfaces thereof fitted to the above-mentioned columns. In order to solve the same problem, the invention of claim 2 is made of an aluminum sound absorbing material in which aluminum fibers are compression-molded at the upper end of a sound insulating wall formed by dropping a panel between columns having an H-shaped cross section. The muffler is horizontally installed with a mounting portion formed on a lower surface thereof fitted to the panel. The above-described second object can be achieved by a structure in which the muffler is fixed to a support through wire ropes for preventing falling through mounting portions formed on both end surfaces of the muffler.

[0007]

The soundproof wall of the present invention has a sound deadening tube installed at the upper end of the sound insulating wall so that the sound wave from the sound source and the sound wave from the sound source are diffracted at the upper end of the sound insulating wall and reach the opposite side of the sound source. Enhancing the soundproofing effect by reducing the sound by increasing the diffraction distance is the same as the conventional one. However, the soundproof wall of the present invention is installed without using a special fixing device or the like as in the related art, because the sound deadening cylinder is attached using a support or a panel for constituting the soundproof wall. Further, since the soundproof wall of the present invention uses an aluminum sound absorbing material obtained by press-molding an aluminum fiber as a material of the sound deadening cylinder, the sound insulating wall is less deteriorated by ultraviolet rays, wind and rain, and the like. Further, by adopting a structure in which the silencer is fixed to the support through a wire rope for preventing fall, there is no possibility that the silencer falls due to an accident or the like.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the illustrated embodiments. FIG. 1 shows a whole view of a soundproof wall according to the present invention, wherein 1 is a column having an H-shaped horizontal cross section installed at a fixed interval on a side surface of a road or the like, and 2 is a column of these. A sound insulating wall 4 formed by dropping a panel 3 such as a sound insulating panel or a sound absorbing sound insulating panel between the columns 1 and 1 is a sound deadening cylinder which is horizontally installed at an upper end of the sound insulating wall 2.

The silencing cylinder 4 is made of an aluminum sound absorbing material 5 formed by press-molding an aluminum fiber, and the material itself is a material known from Japanese Patent Publication No. 5-13517 of the present applicant. As shown in FIG. 2, the inside of the sound deadening cylinder 4 of this embodiment is defined by a vertical sound insulating plate 6, a horizontal sound insulating plate 7, and an inclined sound insulating plate 8 extending obliquely upward from the center. By partitioning the interior in this way, the sound wave from the sound source can be diffracted as shown by the chain line in FIG. 2, and the diffraction distance can be increased as compared with the case where only the vertical sound insulation plate 6 is provided, thereby improving the soundproofing effect. it can. However, the partitioning method inside the silencer 4 is not necessarily limited to the embodiment.

As shown in FIGS. 3 and 4, mounting portions 9 are formed on both end surfaces of the silencing cylinder 4. The mounting portion 9 has a parallelogram shape in which the upper and lower surfaces are slightly inclined, and the outer width of the side plates 10 and 10 on both sides is slightly smaller than the inner width of the H type of the column 1 constituting the sound insulating wall 2. . Therefore, FIG.
As shown in FIG. 5, by fitting the mounting portion 9 to the column 1, the muffler cylinder 4 can be mounted between the columns 1 and 1.

As described at the beginning, a sound insulating wall 2 is formed by dropping a panel 3 in advance on the support column 1. In this embodiment, the upper and lower end surfaces of the panel 3 are inclined surfaces. ing. The inclination of the upper and lower surfaces of the mounting portion 9 corresponds to this, and as shown in FIG. 6, the sound deadening tube until the lower plate 11 of the mounting portion 9 contacts the upper end surface of the sound insulation panel or the sound absorbing sound insulation panel 3. If the support 4 is dropped between the supports 1 and 1, a soundproof wall having a stable structure can be formed.

In addition to the basic configuration described above, the embodiment adds three additional configurations. First, FIGS. 3 and 5
As shown in (1), projecting portions 12 for covering and hiding the column 1 are provided on both sides of the mounting portions 9 formed on both end surfaces of the silencer 4. The peripheral surfaces of these protruding portions 12 are formed by extending the aluminum sound absorbing material 5, and when the mounting portion 9 is fitted to the column 1, the outer surface of the column 1 is covered as shown in FIG.
As a result, the appearance of the soundproof wall is improved, and an improvement in the soundproofing effect can be expected.

Second, holes 14 are formed in the upper plate 13 and the lower plate of the mounting portion 9, and the silencer 4 is fixed to the column 1 through a wire rope 15 for preventing falling through the holes 14. A wire stopper 16 is provided at the upper end of the wire rope 15 as shown in FIG. 5, and is passed through a wire support plate 17 at the upper end of the column 1 as shown in FIGS.
Secure the top of the. The lower end of the wire rope 15 penetrates the end of the sound insulation panel or the sound absorbing sound insulation panel 3 and the support 1
Is fixed at the bottom. With such a structure, the silencing tube 4 is firmly fixed to the column 1 and prevents the silencing tube 4 from dropping even if the car crashes and the sound insulating wall 2 is destroyed. Can be.

Third, a leaf spring 18 is used so that the silencing cylinder 4 dropped between the columns 1 and 1 does not rattle. This leaf spring 18 has a shape as shown in FIG. 8, and is inserted between the support 1 and the lower plate 11 and the upper plate 13 of the mounting portion 9 as shown in FIGS. . The resilient force of the leaf spring 18 presses the muffler cylinder 4 to one side (in the actual example, the sound source side), thereby preventing rattling.

The soundproof wall of the embodiment configured as described above has the following features.
The sound deadening tube 4 installed at the upper end of the sound insulating wall 2 can enhance the soundproofing effect by suppressing sound waves from the sound source and reducing sound by increasing the diffraction distance. In particular, by partitioning the inside as in the embodiment, a soundproof effect superior by about 3 to 5 dB can be obtained as compared with the case where only the sound insulating wall 2 is used.

The muffler cylinder 4 is installed using the support 1 for the sound insulating wall 2 and does not require any special fixing device as in the prior art. Can be. Therefore, the construction cost is low and the workability of the construction is good. In addition, since the silencing cylinder 4 is made of the aluminum sound absorbing material 5 which is formed by press-fitting an aluminum fiber, there is little deterioration due to ultraviolet rays, weather, and the like, and a waterproof film such as when glass wool is used is not required. There is no risk of color unevenness due to rainwater intrusion, and the landscape is not impaired.

Further, in an embodiment, a wire rope for preventing fall is provided.
15 is passed through the mounting portion 9 of the silencing tube 4, so that even if the sound insulating wall 2 is destroyed due to an accident or the like, the silencing tube 4 can be prevented from dropping, and a secondary disaster can be prevented. it can.

FIG. 9 to FIG. 10 show an embodiment of the second aspect of the present invention. The invention of claim 2 also uses the silencer 4 made of aluminum sound absorbing material 5 formed by press-fitting an aluminum fiber, in the same manner as the invention of claim 1, but the lower surface of the silencer 4 has a mounting portion 20.
Are formed. As shown in FIG. 10, the mounting portion 20 has a concave shape extending from the lower surface of the muffler tube 4 to the inside.
The sound absorbing cylinder 4 is mounted on the sound insulating wall 2 by fitting the mounting portion 20 to the upper surface of the panel 3 and fixing the mounting portion 20 to the panel 3 with bolts 21. Preferably, a packing 22 is interposed between the upper end of the panel 3 and the mounting portion 20.

FIG. 11 shows another embodiment of the second aspect of the present invention, in which the mounting portion 20 on the lower surface of the silencer 4 is made of an inverted U-shaped steel material. This is different from the embodiment. However, there is no change in the internal structure of the silencer 4 and its operational effects. Similarly to the first aspect of the present invention, the sound-absorbing effect is enhanced by the sound-absorbing cylinder 4 installed at the upper end of the sound-insulating wall 2 and the sound reduction from the sound source by increasing the diffraction distance. be able to.

In each of the first and second aspects of the present invention, the center line of the sound insulating wall 2 and the center line of the sound deadening cylinder 4 are attached so as to coincide with each other as shown in FIG. As shown in FIGS. 12B and 12C, it is also possible to mount them with their center lines shifted.

[0021]

As described in detail above, the soundproofing wall of the present invention can improve the soundproofing effect without significantly increasing the overall height, the construction cost is low, and the construction workability is low. It has many excellent points such as being good, not easily deteriorating, and having no possibility of the silencer tube falling.

[Brief description of the drawings]

FIG. 1 is a full view of a soundproof wall according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the muffler.

FIG. 3 is a perspective view of an end of the silencer cylinder.

FIG. 4 is a front view of an end of the silencer cylinder.

FIG. 5 is a perspective view of an end of the silencer cylinder.

FIG. 6 is a sectional view of a support portion of the soundproof wall according to the embodiment.

FIG. 7 is an enlarged sectional view of an upper end portion of FIG. 6;

FIG. 8 is a side view of the leaf spring.

FIG. 9 is a perspective view of an embodiment of the second invention.

FIG. 10 is a cross-sectional view of the muffler of FIG.

FIG. 11 is a perspective view of another embodiment of the second invention.

FIG. 12 is a cross-sectional view showing various mounting positions of the muffler.

[Description of Signs] 1 support, 2 sound insulation walls, 3 panels, 4 silencers, 5
Aluminum sound absorbing material, 6 vertical sound insulating plate, 7 horizontal sound insulating plate, 8 inclined sound insulating plate, 9 mounting part, 12 projecting part, 15 wire rope, 20 mounting part, 21 bolt, 22 packing

Claims (6)

(57) [Claims] 1. A sound-absorbing cylinder made of an aluminum sound-absorbing material formed by press-fitting an aluminum fiber, and mounting portions formed on both end surfaces of the sound-absorbing cylinder are formed at the upper end of a sound insulating wall formed by dropping a panel between columns having an H-shaped cross section. A soundproof wall characterized by being fitted horizontally with the above-mentioned support. 2. A sound-absorbing cylinder made of an aluminum sound-absorbing material formed by press-fitting aluminum fibers, and a mounting portion formed on the lower surface of the sound-absorbing cylinder are formed on the upper end of a sound insulating wall formed by dropping a panel between columns having an H-shaped cross section. A soundproof wall characterized by being fitted horizontally to a panel. 3. Attachment portions formed on both end surfaces of the silencer tube,
The soundproof wall according to claim 1, further comprising a projecting portion that covers and covers the column. 4. Attachment portions formed on both end surfaces of the silencer cylinder,
2. The soundproofing wall according to claim 1, wherein the muffler is fixed to the support through a wire rope for preventing falling. 5. The soundproof wall according to claim 1, wherein the interior of the sound deadening cylinder is defined by at least a vertical soundproof plate, a horizontal soundproof plate, and an inclined soundproof plate extending obliquely upward. 6. The center line of the silencer does not deviate from the center line of the sound insulating wall.
The soundproofing according to claim 1 or 2, wherein the soundproofing is installed.
wall.