JP3290333B2 - Soundproofing device and soundproofing wall to which it is mounted - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted along an upper edge of a soundproof wall installed along a highway or a railway to cut off or absorb noise caused by running of a vehicle or the like. The present invention relates to a soundproof device and a soundproof wall to which the soundproof device is attached.

[0002]

2. Description of the Related Art A soundproof wall having a sound absorbing material such as glass wool in a box-shaped case having a large number of sound absorbing holes formed in a front surface thereof, for example, in order to isolate and absorb noise caused by running of a vehicle or the like. , Along highways and railways. This sound barrier is effectively sound-insulated and absorbed for noise from places close to the sound barrier, but from the upper edge to the back side for noise from places distant from the sound barrier. There was a problem of the diffracted sound circling.

[0003]

It is effective to increase the height of the soundproof wall against this diffracted sound, but there is a limit to the height due to the wind pressure. In some cases, the height of an object is curved in an eaves shape or an arch shape on the road side to increase the apparent height so as to reduce the influence of diffracted sound. However, curving the upper part of the soundproof wall inward complicates the structure of the soundproof wall itself and the construction.

In order to address the above problem, for example, Japanese Patent Application Laid-Open
As described in -235209, it has been proposed to attach a tubular sound absorbing device along the upper end of a sound insulating wall. This sound absorbing device is composed of a sound absorbing body in which a sound absorbing material such as glass fiber is sandwiched between an inner surface plate such as a zinc iron plate and a surface plate formed of a porous plate such as a porous aluminum plate, and the sound absorbing body is substantially vertically moved. The lower wall portion comprises a rising lower wall portion, an eaves portion bulging in a substantially semi-circular cross section from the upper portion thereof, and a gentle elongate arc-shaped top wall portion continuous with the eaves portion. Is secured to the upper end of the sound insulating wall by fixing nuts to bolts fixed to both right and left outer sides of the upper end of the sound insulating wall. The sound absorbing device is designed to block the sound circling from the upper end of the sound insulating wall and absorb the sound to reduce the diffraction sound.

However, in this sound absorbing device, since the surface plate is made of a porous plate such as a porous aluminum plate, reflected sound is generated at a portion other than the holes of the surface material, depending on the porosity. Even if the sound enters the sound-absorbing material from a part, a part of the sound is absorbed, but a part is not absorbed, but is reflected by the inner plate and emitted to the outside, and the sound absorption is also between the surface plate and the inner plate. In this case, only the sound absorbing performance corresponding to the thickness of the sound absorbing material can be obtained, and when the sound absorbing material alone is used, the sound absorbing performance in a low frequency region is inferior. In addition, since the installation of the sound absorbing device is performed from both the left and right outer sides of the upper end of the sound insulating wall, there is a problem in the installation where the work can be performed only from the road side, for example.

Accordingly, the present invention solves the above-mentioned problems,
A soundproofing device mounted along the upper edge of a soundproofing wall, which effectively blocks sound coming from the upper end of the soundproofing wall, absorbs sound, and reduces diffraction sound, and a soundproofing wall to which the soundproofing device is attached. It is.

[0007]

In order to achieve the above object, the present invention has the following arrangement. That is, the soundproofing device according to the present invention is a long soundproofing device attached along the upper edge portion of the soundproofing wall, and at least the inside of the cylindrical body made of the sound absorbing material from the side wall portion on the surface side to the upper wall portion. An upper sound insulating plate arranged in an eaves shape protruding on both sides in the width direction behind the upper wall portion, and an air layer provided at least behind the side wall portion on the front surface side, with respect to the side wall portion on the front surface side concave ah <br/> Chi shape is bent is arranged Rutotomoni upper end upper sound insulating plate
A sound insulating wall according to the present invention, comprising a sound absorbing material extending from at least the surface side wall to the upper wall. Inside the tubular body, behind the upper wall, on both sides in the width direction
An upper sound insulating plate arranged in an eaves-like shape, and an air layer provided at least behind the side wall portion on the front surface side, and
As for the side wall portion Ru is disposed is bent concave arched
A soundproofing device having a partitioning soundproofing plate whose upper end is fixed to one side end of the upper soundproofing plate is mounted along the upper edge.

[0008]

According to the soundproofing device and the soundproofing wall to which the soundproofing device according to the present invention is attached, the soundproofing is provided since the partitioning soundproofing plate and the upper soundproofing plate in the shape of an eave are arranged in the cylindrical body. The sound that is about to enter from the upper end of the wall is incident on this cylindrical body and is blocked by the arch-shaped partition sound insulating plate, and is further blocked by the eave-shaped upper sound insulating plate, and both ends of the eave-shaped, that is, Since the light is diffracted twice at the side edge on the front side and the side edge on the back side, the apparent height of the soundproof wall increases,
Diffracted sound is effectively attenuated.

Further, since the cylindrical body is made of a sound absorbing material at least from the side wall portion on the sound source side, that is, from the side wall portion on the front surface side to the upper wall portion, the light enters the cylindrical body from the side wall portion to the upper wall portion. The sound thus absorbed is absorbed by these sound absorbing materials, and since the air layer is provided between the side wall portion and the partition sound insulating plate, the sound is transmitted through the sound absorbing material and reflected by the partition sound insulating plate. Is attenuated by using the air layer as a resonance chamber, and the sound in the low frequency region is also attenuated by this air layer, and the diffraction sound is attenuated by these sound absorbing effects.

[0010]

Next, an embodiment of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of the soundproofing device of the present invention, and FIG. 2 is a sectional view thereof. The soundproofing device P in the embodiment shown in FIGS. The upper sound insulating plate 2 is disposed behind the upper wall portion 12 and has an eave-like shape that protrudes on both sides in the width direction. The middle partition sound insulating plate 3 is located on the sound source side, that is, on the front side. The air layer 4 is provided behind the side wall portion 11 of the first embodiment, and is bent in an arch shape. Reference numeral 5 denotes a soundproofing wall. The soundproofing device P of this embodiment is attached along the upper edge of the soundproofing wall 5,
The soundproof wall 5 according to the present invention is configured. The soundproof wall 5
Is an existing one, and the soundproofing device P may be retrofitted, or the soundproofing device P may be attached together with the newly installed soundproofing wall 5. As the soundproof wall 5, a well-known material such as a soundproof type, a soundproof type, and a soundproof and soundproof type is applied.

The sound-absorbing material constituting the tubular body 1 is not particularly limited as long as it has sound-absorbing properties. Aluminum fibers, open-cell aluminum foams having shape-retaining properties and excellent corrosion resistance, Open-celled polyolefin foams, urethane foams and the like are preferably used. In the cylindrical body 1, the side wall 13 on the opposite side to the sound source, that is, the back surface side may be formed of the sound absorbing material as described above. 12 is required to be made of a sound absorbing material, and if such a configuration is used, the shape is not particularly limited. In order to provide a sufficient air layer 4 between the side wall portion 11 and the middle partition sound insulating plate 3, the shape along the line follows the shape of the upper sound insulating plate 2 and the middle partition sound insulating plate 3 provided inside. It has a substantially mushroom shape swelling from the upper portion of the side wall portion 11 to the upper wall portion 12, but has a cylindrical shape as shown in Fig. 3 and has an air layer 4 between the side wall portion 11 and the partition sound insulating plate 3.
May be made as large as possible, and may be a triangular cylindrical shape, a square cylindrical shape, or the like.

Further, the cylindrical body 1 has a bottom wall 14 made of a metal plate or the like and having a shape corresponding to the shape of the upper edge of the soundproof wall 5 as shown in FIG. Bottom wall 1 of shape 1
It is preferable that the soundproof device P be fitted and mounted on the upper edge portion of the soundproof wall 5 stably without any play or gap.

If the support 51 of the soundproof wall 5 has an H-shaped cross section, as shown in FIG. 1, a concave groove 15 is provided along the side end of the cylindrical body 1 and fitted from the bottom of the concave groove 15. A mating convex portion 61 is protruded, and the mating convex portion 61 is inserted between the opposed flanges 52 of the H-shaped column 51, and a leaf spring 53 is elastically provided between the mating convex portion 61 and the inner surface of the flange 52. If it is made to insert, while inserting the fitting convex part 61 from above between the flanges 52, the soundproofing device P will be dropped between the support | pillars 51, and then the said leaf spring will be between the fitting convex part 61 and the inner surface of the flange 52. The soundproofing device P can be easily and quickly attached to the support 51 of the soundproof wall 5 simply by inserting the soundproof 53. Also flange 5
Since the soundproofing device P can be mounted only from one side dropped from above, the work can be mounted only from the road side, for example, even if the work can be performed only from the road side.

In the present embodiment, the fitting projection 61 is formed by bending a metal plate of 1.6 mm or more in consideration of the stress of the leaf spring 53 and extending on the fitting projection 61 and both sides thereof. The end member 6 is formed by the upright piece 62, and the end member 6 is formed by mounting the end member 6 in the concave groove 15 of the tubular body 1. When the fitting projection 61 is inserted between the flanges 52 of the column 51, the outer surface of the flange 52 is covered with the upstanding pieces 62 on both sides, and the strength of the side end of the tubular body 1 is ensured. .

Next, the material of the upper sound insulating plate 2 and the partitioning sound insulating plate 3 provided inside the tubular body 1 is not particularly limited as long as it has a sound insulating property.
In consideration of the sound insulation and the rigidity capable of maintaining the shape of the tubular body 1, a metal plate or a synthetic resin plate having a high specific gravity is preferably used. The shape of the upper sound insulating plate 2 is not particularly limited as long as it is formed as an eaves projecting on both sides in the width direction. However, in order to enhance the sound insulating effect, as shown in FIG. The tubular body 1 without a gap between the inner surface and both end portions 21
Is preferably extended to the full width. Furthermore, if the air layer 7 is provided between the upper sound insulating plate 2 and the upper wall portion 12,
The sound entering from the upper wall 12 is also preferable because it is effectively absorbed. Further, in the present embodiment, the support portion 22 is formed by projecting the center of the upper sound insulating plate 2, while the cylindrical body 1 is formed.
The upper sound insulating plate 2 and the tubular body 1 are fixed by abutting a pressing plate 23 from the upper wall portion 12 and fixing the pressing plate 23 to the support portion 22 with screws or the like.

Further, the partitioning sound insulating plate 3 is provided with a side wall 1 on the front side.
The shape is not particularly limited as long as it is bent into a concave arch shape with respect to 1, but considering the incident angle of the sound source,
It is preferable that the curvature of the arch be small when the sound source is close and large when the sound source is distant. In this embodiment, the upper end 31 of the middle sound insulating plate 3 is fixed to one side end 21 of the upper sound insulating plate 2, and the lower end 32 is brought into contact with the lower inner surface of the tubular body 1. The sound insulating plate 3 and the upper sound insulating plate 2 are connected, and sound leakage from between the upper sound insulating plate 2 and the inner surface of the tubular body 1 is prevented.

In order to further enhance the sound absorbing properties, as shown in FIG. 4, between the upper wall portion 12 and the upper sound insulating plate 2 behind the upper wall portion 12, and the side wall portion 11 on the front side and the partitioning sound insulating plate 3 behind the same. A sound-absorbing material 8 such as glass wool may be provided between the members, for example, and a tubular or rod-shaped sound absorbing body 9 is attached to the front surface of the side wall portion 11 on the front side as shown in FIG. The sound absorbing effect can be further improved by increasing the sound absorbing area. The shape of the sound absorbing body 9 is not particularly limited, such as a circular cross section, a square shape, and other irregular shapes. In short, the sound absorbing area may be increased by providing the sound absorbing body 9.

[0019]

According to the soundproofing device and the soundproofing wall to which the soundproofing device according to the present invention is attached, the arched bent sound insulating plate and the eaves-shaped upper sound insulating plate are arranged in the cylindrical body. The sound coming from the upper end of the sound barrier enters the cylindrical body and is blocked by the arch-shaped partition sound insulating plate, and is also blocked by the eave-shaped upper sound insulating plate and both ends of the eaves. That is, since the light is diffracted twice at the side edge on the front side and the side edge on the back side, the apparent height of the soundproof wall 5 is increased, and the diffracted sound is effectively attenuated.

Further, since the cylindrical body is formed of a sound absorbing material at least from the side wall portion on the sound source side, that is, from the side wall portion on the front surface side to the upper wall portion, the light enters the cylindrical body from the side wall portion to the upper wall portion. The sound thus absorbed is absorbed by these sound absorbing materials, and since the air layer is provided between the side wall portion and the partition sound insulating plate, the sound is transmitted through the sound absorbing material and reflected by the partition sound insulating plate. Is attenuated by using the air layer as a resonance chamber, and the sound in the low frequency region is also attenuated by this air layer, and the diffraction sound is attenuated by these sound absorbing effects.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the soundproofing device of the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a sectional view showing another embodiment of the soundproofing device of the present invention.

FIG. 4 is a sectional view showing still another embodiment of the soundproofing device of the present invention.

FIG. 5 is a sectional view showing still another embodiment of the soundproofing device of the present invention.

[Explanation of symbols]

 P Soundproofing device 1 Cylindrical body 11 Front side wall 12 Upper wall 13 Backside side wall 14 Bottom wall 15 Concave groove 2 Upper sound insulating plate 21 Side end 22 Supporting part 23 Pressing plate 3 Middle partition sound insulating plate 31 Upper end part 32 Lower end part 4 Air layer 5 Soundproof wall 51 Prop 52 Flange 53 Leaf spring 6 End member 61 Fitting convex part 62 Standing piece 7 Air layer 8 Sound absorbing material 9 Sound absorbing body

Claims (7)

(57) [Claims] 1. A long soundproofing device mounted along an upper edge of a soundproofing wall, wherein at least a sound absorbing material extends from a side wall portion on the front surface side to an upper wall portion inside a tubular body made of a sound absorbing material. The upper sound insulation plate arranged in the shape of an eave that protrudes on both sides in the width direction behind the portion, and an air layer is provided at least behind the side wall portion on the front surface side to form a concave arch with respect to the side wall portion on the front side. It is arranged to be bent Rutotomoni upper end of one of the upper sound insulation plate
A soundproofing device having a partitioning soundproof plate fixed to a side end . 2. The soundproofing device according to claim 1, wherein an air layer is provided between the upper wall portion and an upper sound insulating plate disposed behind the upper wall portion. 3. A sound absorbing material is disposed at least between an upper wall portion and an upper sound insulating plate behind the upper wall portion, and between a side wall portion on a front surface side and a partition sound insulating plate behind the same. The soundproofing device according to claim 1 or 2, wherein: 4. The soundproofing device according to claim 1, wherein a cylindrical or rod-shaped sound absorber is provided on the front surface of the side wall portion on the front surface side. 5. The bottom wall of the tubular body has a shape corresponding to the shape of the top edge of the sound insulation wall, and the bottom wall of the tubular body is fitted and attached to the top edge of the sound insulation wall. The soundproofing device according to claim 1, 2, 3, or 4, wherein 6. A concave groove is provided along the side end of the cylindrical body, and a fitting convex portion is provided at the bottom of the concave groove, and the fitting convex portion is formed of an H-shaped column of the soundproof wall in cross section. A leaf spring is inserted between the opposed flanges and a leaf spring is elastically inserted between the fitting projection and the inner surface of the flange.
The soundproofing device as described. 7. At least from the side wall on the front side to the upper wall, inside the cylindrical body made of the sound absorbing material, behind the upper wall.
By providing an upper sound insulation plate arranged in an eaves shape protruding on both sides in the width direction, and providing an air layer at least behind the front side wall portion
Rutotomoni upper portion is arranged to be bent into a concave arch shape is solid at one side end portion of the upper sound insulation plate to the side wall portion of the front side
A soundproofing wall having a soundproofing device having a fixed inner partition soundproofing plate attached along an upper edge portion.