JPH1115476A - Ventilation type sound shielding wall structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive ventilation type sound shielding wall structure easy to manufacture/mold, increasing design latitude and easily suitable to a frequency area of a sound wave to be attenuated. SOLUTION: A short pipe part 7 is constituted so that plural pieces of sound shielding wall base material 1 making a pair of channel shape material 2 (2a-2d), 3 (3a-3d) forming a belt like groove part 4 prolonging in the longitudinal direction on a side wall of an angular pipe one unit are provided, and both channel shape material 2, 3 are arranged alienatedly in the shape confronting the belt like groove parts each other of both channel shape material 2, 3. Together with that, the side walls of respective channel shape material 2, 3 opposing to the belt like groove part 4 in the sound shielding wail base material 1 of the units different from each other are alienated to be confronted with each other. Together with that, a long pipe part 8 is constituted so that the side walls of respective channel shape material 2, 3 opposing to time belt like groove part 4 in the sound shielding wall base material 1 of the units different from each other are alienated to be confronted with each other, and both end opening parts of both channel shape material 2, 3 of the sound shielding wall base material 1 are blockaded by planar material, and all sound shielding wall base material 1 are connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilated sound insulating wall structure used for an under cover of an automobile engine to reduce noise by absorbing and attenuating noise energy.

[0002]

2. Description of the Related Art Conventionally, as a noise reduction device of this type, for example, one described in Japanese Utility Model Laid-Open No. 188722/1984 is known. As shown in FIGS. 16A and 16B, the noise reduction device disclosed in this publication uses an engine a as a noise source.
, An engine under cover c fixed to the vehicle body b
Is provided to prevent the noise of the engine a from leaking to the outside by the engine under cover c.

The engine under cover c is composed of an inner under cover e having a number of sound absorbing holes d and an outer under cover f arranged below the inner under cover e. An air layer g is formed between them.

With the above structure, the noise energy generated by the engine a is first consumed by friction with the inner peripheral surface of the sound absorbing hole d, and then the noise energy is repeatedly reflected by the air layer g to reduce the noise energy. In addition to attenuating the noise, the noise is reduced by preventing the noise from leaking outside by the outer under cover f having the closed structure.

However, in this noise reduction device, since the outer under cover f has a closed structure, the cooling air required for cooling the engine a is shut off. As a result, there is a problem that the cooling performance of the engine a is deteriorated and the engine a is overheated even though the sound insulation effect is obtained.

Further, as another conventional ventilated sound insulating wall structure 21, as described in Japanese Patent Application Laid-Open No. Hei 7-175485, according to this, as shown in FIGS. It has two or more perforated plates, a plate 22 and a lower plate 23, and a long tube portion 25 penetrating through the perforated plate, and the air mass of the hole 24 provided in the perforated plate. 27 and a sound passing through the air mass 26 of the long tube portion 25, and a sound passing through an acoustic vibration system constituted by an air spring 28 between the perforated plates facing the sound. There is also a structure in which both the sound insulation effect and the air permeability are achieved by the action.

With the ventilation type sound insulation wall structure 21 configured as described above, when the incident wave x reaches the upper plate 22, a part of the incident wave x is reflected by the upper plate 22 to become a reflected wave x ', while the rest is a hole. The transmitted wave A and the transmitted wave B pass through the portion 24 and the long tube portion 25, respectively, and are combined, so that the transmitted wave A and the transmitted wave B reach the side opposite to the incident wave x side. Therefore, as shown in FIG. 18, the resonance frequency f1 of the acoustic vibration system due to the air mass 27 formed in the hole 24 and the air spring 28 formed between the perforated plates, and the primary air A frequency region between the column resonance frequencies f2 can be a region that functions as a sound insulation wall.

The ventilation type sound insulating wall structure 21 constructed as described above.
In the case of manufacturing, it is conceivable that it may be manufactured by assembling after molding in two parts by the injection method,
This injection method requires a high-precision mold, so the cost of the mold is high, and for large products, the mold becomes larger and the cost further increases. In this case, a molding method using an open mold in which the mold is opened is employed.

According to this, as shown in FIG. 19, the perforated plate is divided into upper and lower portions at the center of the long tube portion 25, and the upper plate 22 and the lower plate 23 are formed by open dies, respectively. The lower tube 23 and the lower plate 23 are fitted together with the spigot portions 25a of the long tube portion 25 for manufacture.

[0010]

However, since the ventilation type sound insulation wall structure configured as described above is formed by a mold, it functions effectively in a target frequency range, but is not suitable for a target frequency which is slightly deviated. On the other hand, a mold had to be manufactured separately and manufactured according to the target frequency. For this purpose, a large number of molds must be prepared, which raises a cost problem.

[0011] Further, in an undercover of an automobile engine, it is necessary to prepare many types of ventilated sound insulating wall structures depending on the shape, size, or attenuation frequency region required as a sound insulating wall required for various noise measures. There is no denying that it is disadvantageous in terms of cost.

In consideration of the above points, the present invention is supposed to be actually used for an engine undercover of an automobile, etc., and is easy to manufacture, inexpensive, and has a high degree of freedom in design. It is an object of the present invention to provide a ventilated sound insulation wall structure that can ensure the sound quality.

[0013]

SUMMARY OF THE INVENTION To achieve this object, a ventilated sound insulating wall structure according to the present invention comprises, firstly, a pair of channel members each having a longitudinally extending band-shaped groove formed in a side wall of a pipe. It has a plurality of sound insulation wall base materials as one unit, and separates and arranges both channel shape members in a form in which the band-shaped groove portions of both channel shape members in each sound insulation wall base material are opposed to each other, and sound insulation wall base materials of different units from each other The side walls of the respective channel profiles facing the band-shaped groove portion are spaced apart from each other, and the side walls of each channel shape member facing the band-shaped groove portion of the sound insulation wall base material of different units are separated from each other and faced. The opening portions at both ends of both channel sections of these sound insulating wall base materials are closed with a closing member to connect all the sound insulating wall base materials, and a short pipe portion is formed between both channel shape members constituting each of the sound insulating wall base materials. While it formed and configured to form a long tube portion with each other sound insulation wall substrate.

The entire sound insulating wall substrate is disposed so that the entire both end portions of the sound insulating wall substrate draw a continuous curved shape, and the closing member is bent in the longitudinal direction so as to conform to the curved shape. It is also conceivable that both channel profiles are closed at both ends.

Secondly, the present invention has a plurality of sound insulation wall substrates each including a pair of channel members each having a band-shaped groove extending in the longitudinal direction on the side wall of the pipe. Along with disposing the two channel profiles in a form in which the band-shaped grooves of the two channel profiles face each other, separating the side walls of the channel profiles facing the band-shaped grooves in the sound insulation wall base material of different units from each other. The sound insulating wall base material is connected to all the sound insulating wall base materials by disposing them in one frame body, closing both end openings of both channel profiles of the sound insulating wall base material with a part of a side wall of the frame body. The other portion of the side wall of the sound insulating wall base material and the side wall of the sound insulating wall base material facing the same are separated from each other to form a short pipe portion between both channel shapes constituting each of the sound insulating wall base materials, and the adjacent sound insulating walls are adjacent to each other. Substrates and the frame It is configured so as to other parts of the side walls and forming a long tube portion with the sound insulation wall substrate facing each other to.

Third, the present invention has a plurality of sound insulation wall base materials each including a pair of channel members each having a band-shaped groove extending in the longitudinal direction on the side wall of the pipe. Along with disposing the two channel profiles in a form in which the band-shaped grooves of the two channel profiles face each other, separating the side walls of the channel profiles facing the band-shaped grooves in the sound insulation wall base material of different units from each other. The sound insulating wall base material is connected to all the sound insulating wall base materials by disposing them in one frame body, closing both end openings of both channel profiles of the sound insulating wall base material with a part of a side wall of the frame body. The other part of the side wall is joined to the side wall of the sound insulating wall base material facing the same, and the short channel portion is formed by both the channel members constituting each of the sound insulating wall base materials, and the adjacent sound insulating wall base material is formed. Form a long tube with each other It is to Unishi was constructed.

[0017] The sound insulating wall base material may be arranged so that the entire both ends thereof form a continuous curved shape, or the entirety of the plurality of channel members forming the sound insulating wall base material may be bent in the longitudinal direction. It is also conceivable to configure.

Therefore, according to the present invention, a short pipe portion is formed by both channel members constituting each sound insulating wall base material, and the adjacent sound insulating wall base materials or other portions of the side wall of the frame are opposed to the other portions. A long tube portion is formed between the sound insulating wall base materials, and a band-shaped groove is present in the short tube portion, so that an air spring is formed.

As a result, the interaction between the sound passing through the air mass formed by the long tube portion and the sound passing through the acoustic vibration system constituted by the air mass formed by the short tube portion and the air spring. As a result, a sound insulating effect is exhibited and air permeability is secured.

The cross-sectional shape, height, width, thickness, and other dimensions of the channel member constituting the sound insulating wall base material are variously selected, and the separation distance between the sound insulating wall substrate and a pair of channel members forming the same is determined. By selecting, it is possible to cope with sound waves in a wide frequency range and increase the degree of freedom in design.Because the channel shape can be formed by extrusion, etc., it is easy to form, and the manufacturing cost is reduced while maintaining the sound insulation performance. Becomes possible.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a perspective view showing one unit of a sound insulating wall base material according to an embodiment of the present invention. This sound insulating wall base material 1 comprises a pair of channel members 2 and 3. Have been. Each of the channel members 2 and 3 is basically a rectangular pipe having a substantially rectangular cross section and a long rectangular pipe, and a band-like groove 4 extending in the longitudinal direction is formed on one side wall.

The two channel members 2 and 3 are
The band-shaped grooves 4 are spaced from each other so as to face each other, and constitute one unit of the sound insulating wall substrate 1.

The two channel members 2 and 3 have the same shape and are formed in such a manner that the strip-shaped grooves 4 face each other. It is formed by molding.

FIG. 2 is a perspective view showing a sound insulating wall structure formed by using the sound insulating wall substrate 1 shown in FIG.

The sound insulation wall structure shown in FIG. 2 is constituted by using four units of the sound insulation wall base material 1. And the sound insulation wall substrate 1a
Channel member 2 facing the band-shaped groove 4 in FIG.
a and the side wall of the other channel 3b facing the band-shaped groove portion 4 in the sound insulation wall substrate 1b is spaced apart and faces,
The side wall of one channel member 2b facing the band-shaped groove 4 in the sound insulating wall base 1b and the side wall of the other channel 3c facing the band-shaped groove 4 in the sound insulating wall base 1c are spaced apart and face each other. The side wall of one channel member 2c facing the band-shaped groove portion 4 of the member 1c and the side wall of the other channel 3d facing the band-shaped groove portion 4 of the sound insulating wall base member 1c are spaced apart and opposed to each other.

The four units of the sound insulating wall substrate 1 arranged in this manner are composed of the channel members 2a, 3a, 2b, 3b, 2
A plate member 6 as a closing member is attached to each of the openings 5 at both ends of c, 3c, 2d, 3d by spot welding or the like, and the openings 5 at both ends are closed, and the sound insulating wall base materials 1a, 1b, 1 are closed.
c and 1d are connected to each other.

As a result, each of the sound insulating wall substrates 1a, 1b, 1c
Channel members 2a and 3a, 2b constituting 1d and 1d
And 3b, 2c and 3c, and 2d and 3d,
Are formed, and the sound insulating wall base materials 1a and 1b, 1b and 1c, and 1c and 1d form the long tube portions 8, respectively.

The sound passing through the air mass formed by the long tube portion 8 and the sound passing through the acoustic vibration system constituted by the air mass of the short tube portion 7 and the air spring formed by the band-shaped groove portion 5. By interacting with, a sound insulation effect is exhibited and air permeability is secured.

The channel members 2a, 3a, 2b, 2a, 2b,
Various dimensions such as cross-sectional shapes and thicknesses of 3b, 2c, 3c, 2d, and 3d are selected, and sound-insulating wall substrates 1a, 1b, 1c, and 1d, or a pair of channel members 2a and 3a, 2b, and 3b constituting the same. , 2c and 3c, and 2d and 3d, it is possible to deal with sound waves in a wide frequency range, increase the degree of design freedom, and increase the channel shape 2a,
Since 3a, 2b, 3b, 2c, 3c, 2d, and 3d can be formed by extrusion molding or the like, they can be easily formed, and the manufacturing cost can be reduced while maintaining sound insulation performance.

(Embodiment 2) FIG. 3 is a perspective view showing Embodiment 2 of the present invention. constituted by plate ₆₁ which is formed by bending in a U-shape, the bent portion ₆₁ a is a sound insulation wall substrate 1a, 1b, that are coupled to upper and lower wall side of the 1c and 1d, are different.

However, the channel members 2a, 3a, 2b,
The shapes of 3b, 2c, 3c, 2d, and 3d are the same as those in the first embodiment.
A sound insulation wall structure of a different shape is used by using the same shape as the above.

(Embodiment 3) FIG. 4 is a perspective view showing Embodiment 3 of the present invention, which is different from Embodiment 1 in that the sound insulating wall substrates 1a, 1b, 1c and 1d have a substantially rectangular shape. The channel members 2a, 3a, 2b, 3b, 2c, 3c, 2d, are arranged in a frame 9 as a member, and are formed by one of the side walls 10, 10 facing each other.
By closing the opening 5 at both ends of 3d, the sound insulating wall substrates 1a, 1b,
1c and 1d are connected to each other, and the other side walls 11, 11 of the frame 9 and the channel-shaped members 3a, 2d are arranged separately from each other to form a long tube portion 8. Is different.

However, the channel members 2a, 3a, 2b,
The shapes of 3b, 2c, 3c, 2d, and 3d are the same as those in the first embodiment.
A sound insulation wall structure of a different shape is used by using the same shape as the above.

(Embodiment 4) FIG. 5 is a perspective view showing Embodiment 4 of the present invention. One of the side walls 10 ₁ , 10 ₁ of Embodiment 3 is bent into a U-shaped cross section. ₁ a
That the bent portion 10 ₁ a are linked sound insulation wall substrate 1a, 1b, the upper and lower wall side of the 1c and 1d, are different.

However, the channel members 2a, 3a, 2b,
The shapes of 3b, 2c, 3c, 2d, and 3d are the same as those in the third embodiment.
A sound insulation wall structure of a different shape is used by using the same shape as the above.

Thus, the sound-insulating wall structure is adapted to the shape of the place to be installed.

[0038] Fifth Embodiment FIG. 6 is a perspective view showing a fifth embodiment of the present invention, the sound insulation wall substrate 1a of the first embodiment, 1b, one side wall 12 ₁ side 1c and 1d forming a longitudinally concave, also from forming another sidewall 12 ₂ side in a convex shape is different, the other configurations are substantially the same as the first embodiment.

[0039] Thereby, it is adapted to the shape of the place where the sound insulating wall structure is installed.

[0040] (Embodiment 6) FIG. 7 is a perspective view showing a sixth embodiment of the present invention, the sound insulation wall substrate 1a of the first embodiment, 1b, from the bottom wall 13 ₁ side 1c and 1d from forming a convex curved shape in the upper wall 13 ₂ side varies, other configurations are substantially the same as the first embodiment.

Thus, the shape of the place where the sound insulation wall structure is to be mounted is adapted.

(Seventh Embodiment) FIG. 8 is a perspective view showing a seventh embodiment of the present invention. As a modification of the sixth embodiment, one end of 1b, 1c and 1d with respect to the sound insulating wall substrate 1a. The part shown by the one-dot chain line is cut out so as to gradually incline the part, thereby adapting to the shape of the place where the sound insulation wall structure is to be installed.

(Eighth Embodiment) FIG. 9 is a perspective view showing an eighth embodiment of the present invention. The main structure of the eighth embodiment is substantially the same as that of the first embodiment shown in FIG. Each of the channel members 2a, 3a, 2b, and 3b is composed of two pairs of sound insulating wall substrates including a sound insulating wall substrate 1a formed by the members 2a and 3a and a sound insulating wall substrate 1b formed by the channel members 2b and 3b. Are designed to be curved in the longitudinal direction of each other so as to conform to the shape of the place where the sound insulation wall structure is to be installed, and to efficiently increase the sound insulation effect.

(Embodiment 9) FIG. 10 is a perspective view showing Embodiment 9 of the present invention. The main structure is substantially the same as that of Embodiment 3 shown in FIG. The materials 2a and 3a, 2b and 3b, 2c and 3c, and 2d and 3d are vertically shifted from each other,
a, 1b, 1c and 1d, respectively,
Furthermore, these sound insulation wall substrates 1a, 1b, 1c and 1d
Is characterized in that one of the two ends is arranged so that one of the longitudinal ends has a concave shape in the longitudinal direction and the other has a continuous curved shape in which the other has a convex shape. It is intended to be suitable, efficient and sound insulating.

(Embodiment 10) FIG. 11 is a partially cutaway front view showing an embodiment 10 of the present invention, in which sound insulating wall substrates 1a, 1b, 1c and 1d are arranged in a frame 9. The point is the same as that of the second embodiment, but the sound insulating wall substrate 1
a, 1b, 1c and 1d are channel profiles 2a and 3a, 2b and 3b, 2c and 3c and 2d and 3d, respectively.
Are formed successively smaller, and the shape of the frame 9 is matched to the dimensions of the sound insulating wall substrate 1a formed by the channel members 2a and 3a.

This means that the sound insulating wall substrates 1a, 1b, 1c
When the upper surfaces of the sound insulating wall bases 1b, 1c and 1d are aligned with the lower surfaces of
A gap is left between the lower end and the lower end of the channel. This is because the channel shape is selected in combination with each frequency characteristic in order to prevent noise.

As a result of this configuration, each sound insulating wall substrate 1
a, 1b, 1c and 1d can deal with sound waves in different frequency ranges, and have a wide range of frequency characteristics.

(Embodiment 11) FIG. 12 is a partially broken perspective view showing Embodiment 11 of the present invention, in which channel profiles 2a, 3a, 2b, 3b, 3c, 3c, 2d and 3d are shown. Each is characterized by being formed by an elliptical pipe. As a result, the short pipe portions 7, 7 ... and the long pipe portions 8, 8 ... formed by the respective sound insulating wall substrates 1a and 1b, 1b and 1c and 1c and 1d. Both open ends have a throat shape to form an air rectifying portion.

That is, for example, the air flow A directly directed to the long tube portion 8 passes through the short tube portion 7 directly and is discharged downward. On the other hand, the air flow B colliding with the upper wall surface of the channel member 2b or 3b is slid along the wall surface by the air rectification unit, passes through the short pipe part 7, and is discharged downward. .

As a result, the air flow B passing through the short pipe portion 7
Can slide on the wall surface of the short tube portion 7 and converge on the center of the short tube portion 7 to suppress a so-called separation phenomenon in which the wall surface does not glide, thereby suppressing the resistance of ventilation. At the same time, it is possible to suppress the occurrence of the whistling sound in the band-shaped grooves 4 of the short tube portion 7.

As the channel members 2 and 3, circular pipes may be used. Alternatively, as shown in FIG. 13A, square pipes having rounded corners may be used.
Further, as shown in FIG. 13 (b), it is conceivable to adopt a shape in which the tips of the band-shaped grooves 4, 4 of the channel members 2 and 3 shown in FIG.

(Twelfth Embodiment) FIG. 14 is a perspective view showing a twelfth embodiment of the present invention, in which each of the sound insulating wall substrates 1a, 1b, 1c and 1d according to the first embodiment is centered on a longitudinal axis. This feature is characterized by the fact that it is placed at an angle equal to the angle at which the field of view from outside the sound insulation wall is secured from the direction parallel to the angle of inclination, and the field of view from the rest is shielded. Thus, it can be suitably used for a shielding wall or the like installed on the shoulder of a road.

(Thirteenth Embodiment) FIG. 15 is a perspective view showing a thirteenth embodiment of the present invention. In the second embodiment, the short pipe part 7 formed by the sound insulating wall substrates 1b, 1c and 1d and the length A portion of the tube portion 8, that is, a portion close to the sound source is shielded by the shielding plate 15, and is intended to further improve the sound insulating effect.

In the above-described embodiment, the engine undercover for an automobile has been described as an example. However, the present invention is not limited to this. For example, ventilation and sound insulation such as a sound insulation wall of a building or a road having a larger area can be used. It can be used for all objects that require.

[0055]

As described above, according to the present invention, each sound-insulating wall substrate is constituted by a pair of channel members made of a square, elliptical or round pipe, and a short pipe portion is formed by the channel members. Since a long pipe portion is formed between adjacent sound insulating wall base materials or other portions of the side wall of the frame and the sound insulating wall base materials opposed thereto, the short pipe portion has a band-shaped groove. An air spring is formed, and as a result, the sound passing through the air mass formed by the long tube portion and the sound passing through the acoustic vibration system formed by the air mass and the air spring formed by the short tube portion interact with each other. The effect provides a sound-insulating effect and ensures air permeability.

The cross-sectional shape, height, width, thickness, and other dimensions of the channel material constituting the sound insulating wall base material are variously selected, and the separation distance between the sound insulating wall base material and a pair of channel shape materials constituting the same is determined. By selecting, it is possible to cope with sound waves in a wide frequency range, and from the large sound insulation wall to the small sound insulation wall, it is possible to obtain a sound insulation wall that is optimal for the size of the noise source. , Because it can be formed by extrusion molding, etc.
The production cost can be reduced while maintaining the sound insulation performance.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one unit of a sound insulating wall substrate according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a first embodiment of a sound insulation wall structure configured using the sound insulation wall substrate 1 shown in FIG.

FIG. 3 is a partially cutaway perspective view showing Embodiment 2 of the present invention.

FIG. 4 is a partially cutaway perspective view showing Embodiment 3 of the present invention.

FIG. 5 is a partially cutaway perspective view showing Embodiment 4 of the present invention.

FIG. 6 is a partially cutaway perspective view showing a fifth embodiment of the present invention.

FIG. 7 is a partially cutaway perspective view showing Embodiment 6 of the present invention.

FIG. 8 is a partially cutaway perspective view showing a seventh embodiment of the present invention.

FIG. 9 is a partially cutaway perspective view showing an eighth embodiment of the present invention.

FIG. 10 is a partially cutaway perspective view showing a ninth embodiment of the present invention.

FIG. 11 is a partially cutaway front view showing the tenth embodiment of the present invention.

FIG. 12 (a) is a partially cutaway perspective view showing Embodiment 11 of the present invention. (B) It is a front view which expands and shows the principal part.

13 (a) and (b) are front views of a sound insulating wall substrate showing a modification of the eleventh embodiment shown in FIG.

FIG. 14 is a partially cutaway perspective view showing a twelfth embodiment of the present invention.

FIG. 15 is a partially cutaway perspective view showing a thirteenth embodiment of the present invention.

FIG. 16A is an explanatory view showing a conventional engine noise reduction device. (B) It is a perspective view of the noise reduction device.

FIG. 17A is a perspective view of a conventional ventilation type sound insulation structure. (B) It is explanatory drawing which shows the mechanism of the ventilation type sound insulation structure.

FIG. 18 is a diagram showing an example in which the sound insulating effect of the ventilation type sound insulating structure is reduced.

FIG. 19 is a cross-sectional view of a welded structure of a long tube portion of the ventilation type sound insulation wall structure.

[Explanation of symbols]

1, 1a, 1b, 1c, 1d Single sound-insulating wall base material 2, 2a, 2b, 2c, 2d Channel profile 3, 3a, 3b, 3c, 3d Channel profile 4 Band-shaped groove 5 Both ends opening 6, 6 ₁ Plate material (blocking member) 7 Short tube portion 8 Long tube portion 9 Frame (blocking member) 10 One side wall 11 The other side wall 15 Shield plate

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Isao Satsukawa 19-1 Gomijima, Fuji-shi, Shizuoka Prefecture Yamakawa Industry Co., Ltd. (72) Inventor Keijiro Tsuruga 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor ( 72) Inventor Yasuyuki Asahara 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture, Nissan Motor Co., Ltd. (72) Inventor Yuji Shinbo 2 Takara-cho, Kanagawa-ku, Yokohama City, Kanagawa Prefecture, Nissan Motor Co., Ltd.

Claims (12)

[Claims] 1. A plurality of sound insulation wall substrates each including a pair of channel shapes each having a band-like groove extending in a longitudinal direction formed on a side wall of a pipe. The two channel-shaped members are spaced apart from each other with the band-shaped groove portions facing each other, and the side walls of the channel-shaped members facing the band-shaped groove portions in the sound insulating wall base material of different units are spaced apart from each other and are different from each other. The side walls of each channel shape member facing the band-shaped groove in the unit of the sound insulation wall base material are spaced apart and opposed to each other, and both end portions of both channel shape materials of the sound insulation wall base material are closed with a closing member, and the entire sound insulation wall base material is closed. The sound-insulating wall base materials are connected to form a short pipe portion between the two channel-shaped members forming the respective sound insulating wall base materials, and a long pipe portion is formed between the sound insulating wall base materials. Air-insulated wall structure. 2. The sound-insulating wall base material is arranged so that both end portions as a whole have a continuous curved shape, and the closing member is curved in the longitudinal direction so as to match the curved shape, and the entire sound-insulating wall base material is 2. The ventilation type sound insulation wall structure according to claim 1, wherein both end openings of both channel sections are closed. 3. A plurality of sound insulation wall substrates each including a pair of channel shapes each having a band-shaped groove extending in a longitudinal direction formed on a side wall of a pipe, and each of the sound insulation wall substrates has a plurality of sound insulation wall substrates. The two channel-shaped members are spaced apart from each other with the band-shaped grooves facing each other, and the side walls of the channel-shaped members facing the band-shaped grooves in the sound insulating wall base material of different units are separated from each other and face each other. It is arranged in a frame, and both end portions of both channel sections of the sound insulating wall base material are closed by a part of the side wall of the frame body to connect all the sound insulating wall base materials and other portions of the side wall of the frame body And the side walls of the sound insulating wall base material facing each other are separated from each other to form a short pipe portion between the two channel shapes constituting each of the sound insulating wall base materials, and the adjacent sound insulating wall base materials and the frame Other parts of the side wall of the body And a sound-insulating wall base material facing the sound-insulating wall base material to form a long tube portion. 4. A plurality of sound-insulating wall bases each including a pair of channel-shaped members each having a band-shaped groove extending in a longitudinal direction formed in a side wall of a pipe, and each of the sound-insulating wall bases has a plurality of sound-insulating wall bases. The two channel-shaped members are spaced apart from each other with the band-shaped grooves facing each other, and the side walls of the channel-shaped members facing the band-shaped grooves in the sound insulating wall base material of different units are separated from each other and face each other. It is arranged in a frame, and both end portions of both channel sections of the sound insulating wall base material are closed by a part of the side wall of the frame body to connect all the sound insulating wall base materials and other portions of the side wall of the frame body And the side wall of the sound insulating wall base material facing the same, a short pipe portion is formed by both channel shapes constituting each of the sound insulating wall base materials, and a long pipe portion is formed by adjacent sound insulating wall base materials. Specially that it was formed Ventilation type sound insulation wall structure to be featured. 5. The air-permeable sound insulation wall structure according to claim 3, wherein the sound insulation wall base material is arranged so that the entire both end portions form a continuous curved shape. 6. The ventilation type sound insulating wall structure according to claim 1, wherein the whole of the plurality of channel members forming the sound insulating wall substrate is curved in a longitudinal direction. 7. The ventilation type sound insulating wall structure according to claim 1, wherein a part of the short tube portion and the long tube portion are closed. 8. The ventilation type sound insulation wall structure according to claim 1, wherein the sound insulation wall base material is arranged to be inclined at a predetermined angle about its longitudinal axis. 9. The ventilated sound insulation wall structure according to claim 5, wherein one of the short tube portion and the long tube portion is partially closed at one end of the short tube portion and the long tube portion. 10. The ventilation type sound insulation wall structure according to claim 6, wherein one end of the short tube portion and the long tube portion is partially closed out of the short tube portion and the long tube portion. 11. The ventilation type sound insulating wall structure according to claim 5, wherein said sound insulating wall base material is arranged to be inclined at a predetermined angle about its longitudinal axis. 12. The ventilation type sound insulation wall structure according to claim 6, wherein said sound insulation wall base material is arranged to be inclined at a predetermined angle about its longitudinal axis.