JPH09209316A - Soundproof wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably reduce a wind load applied to a soundproof wall at a strong wind by arranging a sound insulation member capable of being opened or closed between upper and lower soundproof members which are horizontally arranged spacedly in the vertical direction. SOLUTION: This soundproof wall is constituted of soundproof members 1, sound insulation members 2, and supporting material. The upper sound member 1 is provided with a sound absorbing material 12 on the underside of a core material 11 of chevron section, and the surface is covered with a porous plate 13 having fixed porous rate. The lower soundproof member 1 is provided with a sound absorbing material 12 of the upper face of the same shaped core material 11, and the surface is covered with a porous plate 13. The upper soundproof member 1 is provided with an upper end shield material 14 of inverted T-shaped section on the center part, the lower soundproof member 1 is provided with a lower end shield material 15 of grooved section, and a magnet 16 is fitted in the groove. The sound insulation member 2 is provided with a rotary shaft 24 in the horizontal direction on the upper part from the center. The sound insulation member 2 is usually vertical, closely contact with the upper and lower soundproof members 1 between, but horizontally let fall at a strong wind so as to generate an escape way for wind between the upper and lower soundproof members.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof wall provided near a side edge of a road or a railroad, which is a source of noise, and is particularly suitable for use as a viaduct beam or an elevated railroad of the road or railroad. Regarding sound barriers.

[0002]

2. Description of the Related Art Conventionally, in a place where a road or a railroad passes through an urban area, a height of 1.5 m to 3.0 m is provided on a side edge of the road or the railroad in order to reduce noise when a vehicle passes through. A soundproof wall is provided. As this soundproof wall, a sound absorbing material such as a glass wool mat is usually attached to the inside of the wall.

[0003]

However, on an elevated highway installed in the central part of the city, the height is 1.5 m or more.
A soundproof wall with a height of about 3.0 m is not sufficient as a noise countermeasure for condominiums along the road, and recently a soundproof wall with a height of about 7 m has been demanded. However, 7
When the wind speed is 40 m, the wind load on the soundproof wall as high as m is about 1.5 tons in a width of 1 m, and the wind load on the entire soundproof wall reaches several hundred tons, and as a result, the pier of the elevated road. The bending stress and overturning moment applied to the section become extremely large, and in the case of an existing elevated road, it is necessary to reinforce the pier itself. Therefore, if it is possible to reduce the wind load applied to the soundproof wall, the bending stress and overturning moment applied to the bridge pier of the elevated road will also be small, and there will be no need for reinforcement work, or even if reinforcement work is minimal, construction costs will be low. Leads to a decrease.

On the other hand, the soundproof wall has been researched and developed so far with a focus on enhancing the sound reduction effect, and no attention has been paid to the wind load. Therefore, the present inventor pays attention to the wind load, works as a normal soundproof wall when the wind pressure is small, releases the wind when the wind is strong above a certain level, reduces the wind load applied to the soundproof wall, and affects the pier. As a result of repeated research paying attention to making the value as small as possible, the present invention has been completed.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, in which a plurality of soundproof members are vertically arranged at predetermined intervals between support members which are erected at intervals. The sound insulation members are arranged so as to be openable and closable between the sound insulation members, and when the sound pressure exceeds a predetermined wind pressure, the sound insulation members collapse, and when the sound insulation members are opened and the sound pressure falls below the predetermined sound pressure, the sound insulation members are released. The soundproof member is restored so that the space between the soundproof members is closed, and further, the soundproof members are arranged substantially horizontally at a predetermined interval, and the soundproof members are arranged substantially vertically so that they can be opened and closed. The sound insulation member is assembled by a frame member to form a soundproof wall plate, and a plurality of the soundproof wall plates are provided upright at predetermined intervals.

The soundproof member used in the present invention comprises a plate-shaped core material, a sound absorbing material attached to at least one upper and lower surfaces of the core material, and a perforated plate covering the surface of the sound absorbing material. The core material may be any suitable material as long as it has a certain strength and transmission loss, but a metal such as iron or aluminum or F
A synthetic resin such as RP or polyvinyl chloride is suitable. The core material may be a flat plate or may have a chevron cross section. When the chevron has a chevron cross section, the angle of the chevron may be any angle from an acute angle to an obtuse angle.
The thing of about 20 degrees is used suitably. Especially 95-1
The case of 00 degrees is preferable because the sound insulation member described later can be opened and closed smoothly. In addition, if the core material has a chevron cross section, what has a square top, a rounded top, a trapezoid with a narrow top, etc. But it's okay.

As the sound absorbing material, glass wool mat, urethane foam, foamed ceramics, and the like in which these sound absorbing materials are covered with a vinyl fluoride film can be used. The thickness of the sound absorbing material is preferably 1 cm to 10 cm, and particularly, the sound absorbing material having a thickness of 2 cm to 4 cm is most suitable. Further, it is preferable that the sound absorbing material is provided on both upper and lower surfaces of the core material because the sound absorbing performance of the soundproofing member is improved, but it may be provided only on the side facing the sound insulating member described later.

The perforated plate covers the surface of the sound absorbing material, and is made of a metal such as aluminum or a synthetic resin such as FRP or polyvinyl chloride, and has a large number of punched holes formed in a lattice pattern, a zigzag lattice pattern, or the like. The porosity is about 30% or more.

The sound insulation member comprises a shielding plate, a sound absorbing material provided on the road surface side of the shielding plate, and a perforated plate covering the road surface side surface of the sound absorbing material. The shielding plate may be made of any suitable material as long as it has a certain strength and transmission loss, but metals such as iron and aluminum, synthetic resins such as FRP and polyvinyl chloride are suitable. As the sound absorbing material, the same material as the sound absorbing material used for the soundproof member is used as it is. Also,
As the perforated plate, the perforated plate used for the soundproof member is used as it is.

The sound insulation member is arranged substantially vertically to the upper and lower sound insulation members without a gap and can be opened and closed. That is, in the normal case, the sound insulation member is almost vertical and is closely contacted so that there is no gap between the upper and lower sound insulation members. There is an escape path for the wind, and it is designed to be restored when the wind subsides. Normally, when the wind speed is 25 m / sec or more, the sound insulating member is tilted, and when the wind speed is 10-15 m / sec or less, the sound insulating member is restored. The wind speed of 25 m / sec is a standard for vehicle closure on highways, and if the vehicle is closed, the soundproofing performance of the sound barrier is ignored.
When the speed drops below m / sec, the road closure will be released. Further, the wind load of the entire soundproof wall when the sound insulation member falls down is reduced by about 30% to 70% as compared with the wind load when it does not fall down.

In the opening / closing structure of the sound insulating member, rotating shafts are provided at the left and right ends of the sound insulating member, while a bearing is formed on a frame member for assembling the sound insulating member and the sound insulating member, and the rotating shaft serves as the bearing. The upper end of the soundproof member is pivotally supported and is rotatable, and the upper end of the soundproof member is in contact with the soundproof member, and the lower end of the soundproof member is in the center of which a magnet is fitted. A shielding member is provided, and an iron piece magnetically attached to the magnet is provided at the lower end of the sound insulating member. If the shielding plate of the sound insulation member is made of iron, the iron piece may be omitted. When the wind velocity reaches 25 m / sec, the wind pressure causes the sound insulation member to rotate against the magnetic force. Further, a horizontal support arm is provided on the rotary shaft of the sound insulation member, and a pair of restoring members are attached to both sides of the rotary arm across the rotary shaft.

However, when the sound insulation member is rotated by the wind pressure, the support arm is also rotated together with the rotary shaft, and the restoring force of the restoration member attached to the support arm causes the sound insulation member to be restored through the rotation shaft. Is transmitted. Then, when the wind speed is reduced to 10 to 15 m / sec or less, the sound insulation member is restored almost vertically, and the iron piece at the lower end of the sound insulation member is magnetically attached to the magnet of the sound insulation member below,
The gap between the sound insulation member and the soundproof member is closed. The restoring member may be provided for each sound insulating member, but a plurality of sound insulating members may be connected to the same restoring member via the support arms of each sound insulating member. As the restoration member,
For example, weights, springs, air cylinders, solenoid valves, etc. are used, but in the case of weights, the more the sound insulation member falls down due to wind pressure, the more the support arm rises, and the horizontal direction between the rotary shaft and the weight attachment part of the support arm. Is preferable because the distance between the two becomes short and the force for lifting the weight becomes large, and the sound insulating material does not oppose the wind pressure and easily falls.

Therefore, the plurality of soundproof members are arranged substantially horizontally between the support members provided upright at intervals. A steel material, a metal such as an aluminum alloy, a concrete column, or the like is preferably used as the supporting material, and usually has an H-shaped cross section and is erected on the side wall of the road. The soundproof member may be directly installed between the support members, or about 2 to 10 soundproof members and sound insulating members are assembled with a frame member to form a soundproof wall plate, and one to several soundproof wall plates are provided. It may be arranged to be installed between supports. Further, all of the plurality of soundproof members may be horizontally arranged at equal intervals, or a portion with a narrow interval and a portion with a wide interval may be formed. When a narrow portion and a wide portion are formed in the space between the adjacent soundproof members, the sound insulating member may not be provided particularly in the narrow space.

In the soundproof wall of the present invention, the soundproof members are vertically arranged at a predetermined interval in a substantially horizontal manner, and the soundproof members are openably and closably disposed between the upper and lower soundproof members. Therefore, when exposed to a wind pressure of a certain level or more, for example, a wind speed of several tens of meters, the sound insulation member collapses, the vertically adjacent sound insulation members are opened, and an escape path for the wind is created, and the wind load applied to the sound insulation wall is greatly increased. Is reduced to. Also, by the restoration member attached to the sound insulation member,
If the wind pressure drops below a certain level, the sound insulation member will return to its original state,
The vertically adjacent soundproof members are closed again.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described. In FIG. 1, A is a soundproof wall of the present invention, which is composed of a soundproof member 1, a sound insulating member 2 and a support member 5. FIG.
Is a front view of a soundproof wall board A'used in the present invention, FIG. 3 is a sectional view taken along the line AA of FIG. 2, FIG. 4 is a sectional view taken along the line BB of FIG. 2, and FIG. FIG. 3 is a partially cutaway plan view showing a state of being attached to a support member 5, and in the case of the embodiment, both ends of two soundproof members 1 are vertically arranged on the left and right frame members 4 to be framed, and the upper and lower soundproof members are framed. A sound insulating member 2 is vertically attached to the members 1 so as to be vertically openable and closable to form a soundproof wall plate A ′. The soundproof wall plate A ′ of the embodiment has dimensions of a length of 1960 mm and a thickness of 206 m.
m, and the height is 335.5 mm.

The soundproof member 1 on the upper side is made of a core material 11 having a chevron cross section.
The sound absorbing material 12 is provided on the lower surface, and the surface of the sound absorbing material 12 is
It is covered with a perforated plate 13. The core material 11 has a thickness of 1.6 mm
The angle of the chevron is made of zinc iron plate and the angle of the sound absorbing material 12 is 98 degrees.
Thickness 25mm, 48kg / m ^TwoFluoride of glass wool
The one wrapped with a vinyl film is used, and the perforated plate 13
Is a 1 mm thick aluminum plate with a diameter of 10 mm and a pitch of 15 m
Punching of m is applied to a houndstooth check, and the open area ratio is 40.3%.
What has been made is used.

In the lower soundproofing member 1, a sound absorbing material 12 is provided on the upper surface of a core material 11 having a chevron cross section, and the surface of the sound absorbing material 12 is covered with a perforated plate 13. The core material 11, the sound absorbing material 12, and the perforated plate 13 are the same as those used for the upper soundproof member 1. As shown in FIG. 3, the upper soundproofing member 1 is provided with an upper end shield 14 having a substantially inverted T-shaped cross section in the central portion, and the lower soundproofing member 1 has a lower end shield 15 having a substantially groove-shaped cross section in the central portion.
Is provided, and the magnet 16 is fitted in the groove.

The sound insulating member 2 comprises a shield plate 21, a sound absorbing material 22 provided on the road surface side of the shield plate 21, and a perforated plate 23 provided on the road surface side of the sound absorbing material 22. The shielding plate 21 is made of a zinc-iron plate having a thickness of 1.6 mm, the sound absorbing material 22 and the perforated plate 23.
The sound absorbing material 12 and the perforated plate 13 used for the soundproof member 1 are used as they are. At both ends of the sound insulation member 2, a rotary shaft 24 in the horizontal direction is provided at a position slightly above the center. As shown in FIG. 5, the rotary shaft 24 is rotatably attached to a bearing 41 provided on the frame member 4. As shown in FIG. 3, the sound insulating member 2 is provided with a packing material 25 in contact with the upper shield member 14 at the upper end and an iron piece 26 magnetically attached to the magnet 16 of the lower shield member 15 at the lower end. There is. Further, a horizontal support arm 27 is fixed to the rotary shaft 24 protruding from the bearing 41 of the frame member 4.

In FIGS. 4 and 5, reference numeral 3 is a weight used as a restoring member. The weight 3 is mounted on a pedestal 17 extending from the core 11 of the soundproof member 1 below, and a pair of ropes 31 are attached to both sides of the support arm 27 with the rotating shaft 24 interposed therebetween. The length of the rope 31 is the supporting arm 2
It does not slacken significantly when 7 is made horizontal, and the weight 3 is not lifted up. The weight 3 has a weight of 1.5 kg, and one weight 3 is lifted when the sound insulating member 2 is rotated by wind pressure.

FIG. 6 is a cross-sectional view of another embodiment of the soundproof wall plate A'used in the soundproof wall of the present invention, which has a shape like two soundproof wall plates A'shown in FIG. There is. The sound insulation members 2 are provided in two places, upper and lower, and the support arms 27 are attached to the rotary shafts 24 of the respective sound insulation members 2. Weight 3
Are provided on the lower side of the sound insulation member 2 below, and the rope 31
Is extended to the upper support arm 27, and the upper and lower sound insulation members 2,
2 is restored by the same weight 3.

In the embodiment shown in FIG. 7, the weight 3 of the sound insulation member 2 is
Has a spherical shape so that it can be accommodated on the lower side of the inclined pedestal 17.

[0022]

As described in detail above, the soundproof wall of the present invention is
Since the plurality of soundproof members are vertically arranged at a predetermined interval substantially horizontally between the support members provided at intervals, and the sound insulation members are openably and closably arranged between the upper and lower soundproof members.
When a wind pressure equal to or higher than a predetermined wind speed is exerted, the sound insulation member falls and a wind escape path is formed between the upper and lower sound insulation members, and the wind load applied to the sound insulation wall can be significantly reduced. Therefore, when installing a large soundproof wall on an elevated road, it is not necessary to reinforce the piers of the elevated road itself, and even when newly constructing an elevated road, there is no need to particularly strengthen the foundations of the piers. It is advantageous in designing an elevated road, and has remarkable effects such as shortening the construction period and reducing construction costs.

In the soundproof wall of the present invention, since the sound insulating member is provided with a restoring member, the sound insulating member which has fallen in a strong wind is restored to its original state at a stage where the wind has stopped to some extent, and again functions as a soundproof wall. Will recover.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of an embodiment of a soundproof wall of the present invention.

FIG. 2 is a front view of an example of a soundproof wall plate used for the soundproof wall of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a partially cutaway plan view showing an installed state of the soundproof wall plate of the present invention.

FIG. 6 is a cross-sectional view of another embodiment of the soundproof wall plate used for the soundproof wall of the present invention.

FIG. 7 is a cross-sectional view of yet another embodiment of a soundproof wall plate used in the soundproof wall of the present invention.

[Explanation of symbols]

 A Soundproof Wall A'Soundproof Wall Plate 1 Soundproof Member 11 Core Material 12 Sound Absorbing Material 13 Perforated Plate 14 Upper End Shielding Material 15 Lower End Shielding Material 16 Magnet 17 Pedestal 2 Sound Insulating Member 21 Shielding Plate 22 Sound Absorbing Material 23 Perforated Plate 24 Rotating Shaft 25 Packing material 26 Iron piece 27 Support arm 3 Restoration member 31 Rope 4 Frame material 41 Bearing 5 Support material

Claims (6)

[Claims] 1. A plurality of soundproofing members are arranged substantially horizontally at a predetermined interval between support members which are vertically provided at intervals, and soundproofing members are openably and closably disposed between the soundproofing members. A soundproof wall in which the sound insulation member collapses when the sound pressure exceeds a predetermined pressure and the space between the sound insulation members is opened, and the sound insulation member restores when the sound pressure falls below a predetermined wind pressure and the sound insulation member is closed. 2. A soundproof wall plate, which is constructed by assembling a soundproof member vertically arranged at a predetermined interval in a substantially horizontal direction and a soundproof member vertically opened and closed between the soundproof members by a frame member. The soundproof wall according to claim 1, wherein a plurality of the soundproof wall plates are supported between support members which are provided upright at predetermined intervals. 3. A sound insulation member is provided with a horizontal rotation shaft projecting from its end portion so as to be rotatable, and a sound restoration member is provided with a restoration member, and the sound restoration member is provided with the restoration member below a predetermined wind pressure. The soundproof wall according to claim 1 or 2, wherein the soundproof wall is made stationary. 4. The sound support member according to claim 1, 2 or 3, wherein a horizontal support arm is fixed to the rotary shaft of the sound insulation member, and a pair of restoring members are attached to the support arm with the rotary shaft interposed therebetween. Sound barrier. 5. A plurality of sound insulation members arranged between a plurality of soundproof members are connected to a common restoration member.
The soundproof wall according to claim 3 or claim 4. 6. The restoring member is a pair of weights, the lower end of the weights is supported by a pedestal, and only one of the weights is lifted when the sound insulating member is open. The soundproof wall according to claim 4 or claim 5.