JP2006335463A - Sound insulation container for aircraft - Google Patents
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- JP2006335463A JP2006335463A JP2005165755A JP2005165755A JP2006335463A JP 2006335463 A JP2006335463 A JP 2006335463A JP 2005165755 A JP2005165755 A JP 2005165755A JP 2005165755 A JP2005165755 A JP 2005165755A JP 2006335463 A JP2006335463 A JP 2006335463A
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本発明は、航空機が発する低周波音の騒音を低減する航空機用防音コンテナに関し、詳しくは、例えば一定回転数で回転するプロペラを備えた航空機に搭載したコンテナにより人や動物等を搬送する際に内部に伝わる騒音を低減して人や動物等に対する騒音の影響を軽減しようとする航空機用防音コンテナに係るものである。 The present invention relates to an aircraft soundproofing container that reduces low-frequency noise generated by an aircraft, and more specifically, for example, when transporting people, animals, or the like by a container mounted on an aircraft equipped with a propeller that rotates at a constant rotational speed. The present invention relates to a soundproof container for aircraft that attempts to reduce the noise transmitted to the inside and reduce the influence of noise on humans and animals.
従来の航空機用コンテナは、主として貨物等を内部に収容して航空機の胴体内に搭載し、貨物等の輸送をするのに使われていた。そして、特別な機能を付加したものとして、箱形に形成され内部に輸送物資を収容するコンテナ本体と、側壁部の少なくとも一面に形成され輸送物資の出入口となる開閉扉との間からの電磁波の漏洩を防止するようにしたものが提案されている（例えば、特許文献１参照）。 Conventional aircraft containers have been mainly used for transporting cargo and the like by storing cargo and the like inside the aircraft fuselage. As a special function, electromagnetic waves from between the container body, which is formed in a box shape and accommodates transportation goods inside, and the opening / closing door, which is formed on at least one side of the side wall part and serves as a doorway for transportation goods, are provided. A device for preventing leakage has been proposed (see, for example, Patent Document 1).
また、他の特別な機能を付加したものとして、コンテナ本体をポリカーボネートにより一体成型すると共に、その壁面をコンテナ本体の内部側に湾曲させ、さらにコンテナ本体における角部に丸みを持たせて、強い衝撃に対しても十分対応可能としたものが提案されている（例えば、特許文献２参照）。 As another special function added, the container body is integrally molded from polycarbonate, the wall surface is curved to the inside of the container body, and the corners of the container body are rounded to give a strong impact. For example, Japanese Patent Application Laid-Open No. H10-260260 has been proposed.
さらに、他の特別な機能を付加したものとして、貨物収納用箱体を、機内の固定装置によって固定可能なベース板上に支持する複数の支持手段を、上記箱体の重量を支持すると共に該箱体の振動を防止するための防振手段と、上記箱体がベース板上から所定距離以上に離れることを防止するストッパ手段とで構成し、貨物収納用箱体が振動により動かないようにしたものが提案されている（例えば、特許文献３参照）。
しかし、上記いずれの特許文献１〜３に記載された航空機用コンテナも、主として貨物等を内部に収容して航空機で輸送するのに使われるものであり、人や動物等を搬送する際にコンテナの内部に伝わる騒音を低減するという機能を付加したものは存在しなかった。 However, the aircraft containers described in any of the above Patent Documents 1 to 3 are mainly used for accommodating cargo and the like and transporting them by aircraft. There was no addition of the function of reducing the noise transmitted to the interior of the.
ところが、地震や台風などによる災害発生時に、被災地の飛行場から医療機関の存在する地域の飛行場まで傷病者を搬送するのに、内部に医療設備を備えた医療用コンテナに傷病者を収容して航空機内に搭載し、該航空機で搬送したり、その搬送中に治療を行うことが考えられている。この場合、航空機が発する騒音がうるさくて、内部に収容された傷病者や医師等に不快感を与えることがある。特に、上記医療用コンテナの内部において、緊急に治療や手術を要する場合は、医師同士の意思疎通が困難になって適切な治療や手術を行うのが難しくなる。 However, in the event of a disaster such as an earthquake or typhoon, the victim is housed in a medical container equipped with medical equipment to transport the victim from the airport in the affected area to the airport in the area where the medical institutions are located. It is considered to be installed in an aircraft and transported by the aircraft, or to perform treatment during the transportation. In this case, the noise generated by the aircraft is noisy and may cause discomfort to the patient or doctor housed inside. In particular, when urgent treatment or surgery is required inside the medical container, it is difficult for doctors to communicate with each other, making it difficult to perform appropriate treatment or surgery.
また、例えば競馬の馬のように環境に敏感な動物等を航空機用コンテナに収容して航空機で搬送する場合にも、その動物等を航空機の発する騒音で刺激してしまい、安全且つ無事に動物等を搬送することができないことがある。 In addition, for example, when animals that are sensitive to the environment, such as horse racing horses, are housed in an aircraft container and transported by an aircraft, the animals are stimulated by the noise generated by the aircraft, and the animals are safely and safely Etc. may not be transported.
このような場合は、上記医療用コンテナ又は航空機用コンテナの周りを取り囲む壁を工夫して、壁の内部に発泡材などの遮音材、防音材等を入れて防音対策を行うことが考えられる。しかし、可変ピッチプロペラのように一定回転数で回転するプロペラを備えた航空機においては、そのプロペラの回転から発生する騒音は、例えば６０〜７０Hzという低周波音をピークとするものである。このような低周波音は在来の遮音材、防音材等では十分に遮断することができず、もし十分な遮音、防音対策を行おうとすると、寸法が大きくなりコンテナが大型化してしまう。 In such a case, it is conceivable to devise a wall surrounding the medical container or the aircraft container, and to take a soundproofing measure by inserting a sound insulating material such as a foam material, a sound insulating material, or the like inside the wall. However, in an aircraft equipped with a propeller that rotates at a constant rotational speed, such as a variable pitch propeller, noise generated from the rotation of the propeller has a low frequency sound of, for example, 60 to 70 Hz as a peak. Such low-frequency sound cannot be sufficiently blocked by conventional sound insulation materials or sound insulation materials. If sufficient sound insulation and sound insulation measures are to be taken, the size increases and the container becomes large.
そこで、本発明は、このような問題点に対処し、例えば一定回転数で回転するプロペラを備えた航空機に搭載したコンテナにより人や動物等を搬送する際に内部に伝わる騒音を低減して人や動物等に対する騒音の影響を軽減しようとする航空機用防音コンテナを提供することを目的とする。 Therefore, the present invention addresses such problems and reduces noise transmitted to the inside when a person or animal is transported by a container mounted on an aircraft equipped with, for example, a propeller that rotates at a constant rotational speed. An object of the present invention is to provide an aircraft soundproof container intended to reduce the influence of noise on animals and animals.
上記目的を達成するために、本発明による航空機用防音コンテナは、側壁部の少なくとも一面に出入り口となる開閉扉を備え、航空機内の固定装置によって固定可能とされ、内部に人や動物等を収容するコンテナ本体と、上記コンテナ本体の外側面及び屋根面に複数個設けられ、内側に空洞部を有する箱形に形成され、この箱形の外側板材には内部の空洞部と連通し断面円形の筒状とされて所定長さで外部に突出又は内部に陥没した首部を有する共鳴型音減衰器とを備え、上記共鳴型音減衰器の共鳴周波数は、航空機が発する低周波音の周波数と略同一又は近似した値とされたものである。 In order to achieve the above object, a soundproof container for aircraft according to the present invention includes an opening / closing door serving as an entrance / exit on at least one side of a side wall, and can be fixed by a fixing device in the aircraft, and accommodates people, animals, and the like inside. A container body, a plurality of container bodies provided on the outer surface and the roof surface of the container body, and formed into a box shape having a hollow portion on the inner side. The box-shaped outer plate member communicates with the inner cavity portion and has a circular cross section. A resonance-type sound attenuator having a cylindrical shape and having a neck protruding outside or having a depression inside, and the resonance frequency of the resonance-type sound attenuator is substantially equal to the frequency of low-frequency sound emitted by an aircraft. The values are the same or approximate.
このような構成により、側壁部の少なくとも一面に出入り口となる開閉扉を備え、航空機内の固定装置によって固定可能とされたコンテナ本体で内部に人や動物等を収容し、上記コンテナ本体の外側面及び屋根面に複数個設けられ、共鳴周波数が航空機の発する低周波音の周波数と略同一又は近似した値とされた共鳴型音減衰器により、上記低周波音を吸収してコンテナ本体の内部に伝わる騒音を低減する。 With such a configuration, an opening / closing door serving as an entrance / exit is provided on at least one surface of the side wall portion, and a person or an animal is accommodated inside the container body that can be fixed by a fixing device in the aircraft. And a resonance type sound attenuator provided on the roof surface, the resonance frequency of which is approximately the same as or approximate to the frequency of the low frequency sound emitted by the aircraft, and absorbs the low frequency sound inside the container body. Reduce transmitted noise.
また、上記共鳴型音減衰器は、平面形状が多角形に形成されたものである。これにより、上記コンテナ本体の外側面及び屋根面に、平面形状が多角形に形成された複数個の共鳴型音減衰器を、それらの外周辺を互いに接して縦横に隙間なく並べることができる。 The resonance type sound attenuator has a planar shape formed in a polygon. As a result, a plurality of resonance type sound attenuators having a polygonal planar shape can be arranged on the outer surface and the roof surface of the container body with their outer peripheries in contact with each other vertically and horizontally without any gaps.
さらに、上記コンテナ本体の外側面及び屋根面に複数個設けられる共鳴型音減衰器は、適宜の複数個を縦横に隙間なく並べて一体化した複合パネルに形成されたものである。これにより、複数個の共鳴型音減衰器を縦横に隙間なく並べて一体化した複合パネルの状態として、上記コンテナ本体の外側面及び屋根面に簡易に取り付けることができる。 Further, a plurality of resonance type sound attenuators provided on the outer surface and the roof surface of the container main body are formed in a composite panel in which a plurality of appropriate sound attenuators are arranged vertically and horizontally without any gap. Thereby, it can attach to the outer surface and the roof surface of the said container main body easily as the state of the composite panel which put in order and integrated the some resonance type sound attenuator without the gap horizontally.
請求項１に係る発明によれば、コンテナ本体の外側面及び屋根面に複数個設けられ、共鳴周波数が航空機の発する低周波音の周波数と略同一又は近似した値とされた共鳴型音減衰器により、上記低周波音を吸収して人や動物等を収容したコンテナ本体の内部に伝わる騒音を低減することができる。したがって、例えば一定回転数で回転するプロペラを備えた航空機に搭載したコンテナにより、人や動物等を搬送する際に内部に伝わる騒音を低減して人や動物等に対する騒音の影響を軽減することができる。このことから、例えば医療用のコンテナの内部に収容された傷病者や医師等に不快感を与えるのを防止し、医師同士の意思疎通を容易にすることにより、医師等の安定した医療処置が可能となる。また、例えば動物用のコンテナの内部に収容された競馬の馬などの動物等を航空機の発する騒音で刺激するのを防止し、安全且つ無事に動物等を搬送することができる。 According to the first aspect of the present invention, a resonance type sound attenuator is provided on the outer surface and the roof surface of the container main body, and the resonance frequency is substantially the same as or approximate to the frequency of the low frequency sound emitted by the aircraft. Thus, it is possible to reduce the noise transmitted to the inside of the container main body that accommodates humans and animals by absorbing the low frequency sound. Therefore, for example, by using a container mounted on an aircraft equipped with a propeller that rotates at a constant rotational speed, it is possible to reduce the noise transmitted to the inside when carrying people, animals, etc., and reduce the effects of noise on people, animals, etc. it can. From this, for example, it is possible to prevent discomfort for the sick or doctor housed in a medical container, and facilitate communication between doctors, thereby enabling stable medical treatment by doctors and the like. It becomes possible. Further, for example, it is possible to prevent an animal such as a horse racing horse housed in an animal container from being stimulated by noise generated by the aircraft, and to safely and safely transport the animal or the like.
また、請求項２に係る発明によれば、コンテナ本体の外側面及び屋根面に、平面形状が多角形に形成された複数個の共鳴型音減衰器を、それらの外周辺を互いに接して縦横に隙間なく並べることができる。したがって、航空機の発する低周波音を、コンテナ本体の略全周面で吸収して内部に伝わる騒音を低減することができる。 According to the second aspect of the present invention, a plurality of resonant sound attenuators having a polygonal planar shape are formed on the outer surface and the roof surface of the container main body, and the outer periphery is in contact with each other in the vertical and horizontal directions. Can be arranged without gaps. Therefore, the low-frequency sound emitted from the aircraft can be absorbed by substantially the entire peripheral surface of the container body, and noise transmitted to the inside can be reduced.
さらに、請求項３に係る発明によれば、複数個の共鳴型音減衰器を縦横に隙間なく並べて一体化した複合パネルの状態として、上記コンテナ本体の外側面及び屋根面に簡易に取り付けることができる。したがって、複数個の共鳴型音減衰器をコンテナ本体の外側面及び屋根面に取り付ける作業を容易として、防音対策に要する工期を短縮することができる。 Furthermore, according to the invention according to claim 3, as a composite panel in which a plurality of resonance type sound attenuators are arranged side by side without any gap, they can be easily attached to the outer surface and the roof surface of the container body. it can. Therefore, it is possible to facilitate the work of attaching a plurality of resonance type sound attenuators to the outer surface and the roof surface of the container body, and to shorten the work period required for soundproofing measures.
以下、本発明の実施形態を添付図面に基づいて詳細に説明する。図１は本発明による航空機用防音コンテナの実施形態を示す正面図であり、図２はその左側面図である。この航空機用防音コンテナは、航空機が発する低周波音の騒音を低減するもので、コンテナ本体１と、複数個の共鳴型音減衰器２とを備えて成る。 Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a front view showing an embodiment of a soundproof container for aircraft according to the present invention, and FIG. 2 is a left side view thereof. This soundproof container for aircraft reduces low frequency noise generated by an aircraft, and includes a container body 1 and a plurality of resonance type sound attenuators 2.
コンテナ本体１は、内部に人や動物等を収容するもので、航空機の貨物室の内部に搭載しうる高さＨ、幅Ｗ、長さＬを有する箱体（図６参照）に形成されており、側壁部３の少なくとも一面に出入り口となる開閉扉４を備え、航空機内の固定装置によって固定可能とされている。すなわち、上記開閉扉４を開いて人や動物等を内部に入れ、その開閉扉４を閉じて内部に収容するようになっている。また、貨物室内への固定は、上記コンテナ本体１を図１及び図２に示すパレット５ａ，５ｂに載せてタイダウン装具によって固縛し、そのパレット５ａ，５ｂを貨物室の床面に設けられた公知の固定装置（フック状の金具）によって固定するようになっている。 The container main body 1 accommodates people, animals, and the like inside, and is formed in a box (see FIG. 6) having a height H, a width W, and a length L that can be mounted inside an aircraft cargo compartment. In addition, an opening / closing door 4 serving as an entrance / exit is provided on at least one surface of the side wall portion 3 and can be fixed by a fixing device in the aircraft. That is, the opening / closing door 4 is opened to put a person, an animal or the like inside, and the opening / closing door 4 is closed to be accommodated inside. In addition, the container body 1 is fixed on the pallets 5a and 5b shown in FIGS. 1 and 2 and secured with tie-down equipment, and the pallets 5a and 5b are provided on the floor of the cargo compartment. It fixes with the well-known fixing device (hook-shaped metal fitting).
上記コンテナ本体１の具体的な大きさは、例えば高さＨ＝200cm程度、幅Ｗ＝200cm程度、長さＬ＝500cm程度とされている。なお、図１及び図２において、符号６は、上記コンテナ本体１を航空機の貨物室内に搭載する場合に、該コンテナ本体１をパレット５ａ，５ｂと共にクレーンで吊り上げるときの吊り金具を示している。この場合、上記コンテナ本体１をクレーンで吊り上げて、一旦、専用のカーゴ・ローダに積載し、このカーゴ・ローダから航空機の貨物室に移動させて搭載する。 Specific sizes of the container body 1 are, for example, a height H = 200 cm, a width W = 200 cm, and a length L = 500 cm. In FIG. 1 and FIG. 2, reference numeral 6 denotes a hanging metal fitting for lifting the container body 1 together with the pallets 5a and 5b with a crane when the container body 1 is mounted in the cargo compartment of an aircraft. In this case, the container body 1 is lifted by a crane, once loaded on a dedicated cargo loader, moved from the cargo loader to the cargo compartment of the aircraft, and loaded.
上記コンテナ本体１の外側面及び屋根面には、共鳴型音減衰器２が複数個設けられている。この共鳴型音減衰器２は、その共鳴周波数と略同一又は近似した周波数の音を吸収してコンテナ本体１の内部に伝わる騒音を低減するもので、図３に示すように、内側に空洞部７を有する箱形に形成され、図４（ａ）に示すように、上記箱形の外側板材８には内部の空洞部７と連通し断面円形の筒状とされて所定長さａで内部に陥没した首部９を有しており、ヘルムホルツ共鳴器と呼ばれるものである（特許第３３１７９３６号公報参照）。そして、この共鳴型音減衰器２の共鳴周波数は、航空機が発する低周波音の周波数と略同一又は近似した値とされている。例えば、可変ピッチプロペラのように一定回転数で回転するプロペラを備えた航空機においては、そのプロペラの回転から発生する騒音は例えば６０〜７０Hzという低周波音であるが、この周波数に合わせてある。 A plurality of resonant sound attenuators 2 are provided on the outer surface and the roof surface of the container body 1. The resonance type sound attenuator 2 absorbs a sound having a frequency substantially the same as or approximate to the resonance frequency and reduces noise transmitted to the inside of the container body 1. As shown in FIG. 4, the box-shaped outer plate 8 is formed in a cylindrical shape with a circular cross section in communication with the internal cavity 7, and has a predetermined length a. The neck portion 9 is depressed and is called a Helmholtz resonator (see Japanese Patent No. 3317936). The resonance frequency of the resonance type sound attenuator 2 is a value that is substantially the same as or approximate to the frequency of the low frequency sound emitted by the aircraft. For example, in an aircraft equipped with a propeller that rotates at a constant rotational speed, such as a variable pitch propeller, noise generated from the rotation of the propeller is a low-frequency sound of, for example, 60 to 70 Hz, and is adjusted to this frequency.
具体的には、上記共鳴型音減衰器２は、図３に示すように、内側に空洞部７を有し平面形状が例えば矩形状とされた箱形を木材等の部材で形成し、上記箱形の外側板材８の中央部には内部に陥没した首部９が形成されている。このような形状の共鳴型音減衰器２においては、主として空洞部７の容積ｖ、首部９の断面積ｓ、該首部９の長さａ、及び音速ｃにより共鳴周波数が決まる。この共鳴周波数に一致する音波が上記首部９から共鳴型音減衰器２に入射すると、上記首部９の空気は激しく振動して、摩擦損失により音のエネルギーが熱のエネルギーに変換されて失われ、低周波音が吸収される（ヘルムホルツ共鳴器の動作原理）。 Specifically, as shown in FIG. 3, the resonance type sound attenuator 2 is formed by forming a box shape having a hollow portion 7 inside and having a planar shape, for example, a rectangular shape with a member such as wood, and the like. A neck portion 9 that is recessed inside is formed at the center of the box-shaped outer plate member 8. In the resonant sound attenuator 2 having such a shape, the resonance frequency is determined mainly by the volume v of the cavity 7, the cross-sectional area s of the neck 9, the length a of the neck 9, and the speed of sound c. When a sound wave having the resonance frequency enters the resonance type sound attenuator 2 from the neck 9, the air in the neck 9 vibrates violently, and the sound energy is converted into heat energy by friction loss and lost. Low frequency sound is absorbed (Helmholtz resonator operating principle).
上記共鳴型音減衰器２の具体的な大きさは、例えば縦ｄ＝34cm程度、横ｅ＝34cm程度、高さｈ＝７cm程度で空洞部７の容積ｖ＝8000cm3程度とされ、首部９の長さａ＝４cm程度、首部９の断面積ｓ＝7cm2程度とされている。このような共鳴型音減衰器２の寸法とすることにより、その共鳴周波数が例えば６５Hzとされる。なお、上記首部９は、図４（ｂ）に示すように、所定長さａ′で箱形の外部に突出させてもよい。 A specific size of the resonance type sound attenuator 2 is, for example, a longitudinal d = 34 cm, a lateral e = 34 cm, a height h = 7 cm, and the volume v of the cavity 7 is about 8000 cm 3. The length a is about 4 cm, and the cross-sectional area s of the neck 9 is about 7 cm 2 . By setting the dimensions of the resonance type sound attenuator 2 as described above, the resonance frequency is set to 65 Hz, for example. The neck portion 9 may protrude outside the box shape with a predetermined length a ′ as shown in FIG.
そして、上記のように構成された複数個の共鳴型音減衰器２が、図１及び図２に示すように、前記コンテナ本体１の少なくとも左側面及び右側面並びに屋根面に隙間なく並べて取り付けられ、本発明による航空機用防音コンテナが構成されている。 A plurality of resonant sound attenuators 2 configured as described above are arranged side by side on at least the left side surface, the right side surface, and the roof surface of the container body 1 without gaps, as shown in FIGS. The aircraft soundproof container according to the present invention is configured.
このような構造により、上記航空機用防音コンテナを航空機の貨物室内に搭載して搬送すると、コンテナ本体１の外側面に取り付けられた多数の共鳴型音減衰器２により、一定回転数で回転するプロペラを備えた航空機のそのプロペラの回転から発生する低周波音をヘルムホルツ共鳴器の動作原理で吸収して、人や動物等を収容したコンテナ本体１の内部に伝わる騒音を低減することができる。したがって、コンテナ本体１の内部に収容された人や動物等に対する騒音の影響を軽減することができる。なお、上記貨物室内に搭載された航空機用防音コンテナの周囲は、貨物室の内壁で閉じられた空間となっており、コンテナ本体１の外周面と貨物室の内周面との間にプロペラの回転による低周波音が定在波としてこもった状態となるが、この空間部についても上記多数の共鳴型音減衰器２の存在により吸音することができる。このことから、航空機の貨物室内全体の騒音を低減することが期待できる。 With such a structure, when the soundproof container for aircraft is mounted and transported in the cargo compartment of an aircraft, a propeller that rotates at a constant rotational speed is provided by a large number of resonant sound attenuators 2 attached to the outer surface of the container body 1. The low frequency sound generated from the rotation of the propeller of the aircraft equipped with the above can be absorbed by the operating principle of the Helmholtz resonator, and the noise transmitted to the inside of the container main body 1 containing humans, animals and the like can be reduced. Therefore, it is possible to reduce the influence of noise on people, animals and the like housed in the container body 1. The soundproof container for aircraft mounted in the cargo compartment is a space closed by the inner wall of the cargo compartment, and the propeller is placed between the outer peripheral surface of the container body 1 and the inner peripheral surface of the cargo compartment. Although the low frequency sound caused by the rotation is confined as a standing wave, the space portion can also absorb sound due to the presence of the multiple resonance type sound attenuators 2. From this, it can be expected to reduce the noise in the entire cargo compartment of the aircraft.
なお、図１及び図２では、共鳴型音減衰器２をコンテナ本体１の左側面及び右側面並びに屋根面に隙間なく並べて取り付けたものとしたが、これに限られず、上記コンテナ本体１の前後両側面にも取り付けてもよい。この場合は、図２に示す開閉扉４が開け閉めできるように工夫して取り付ける。さらに、上記コンテナ本体１の底面にも複数個の共鳴型音減衰器２を取り付けてもよい。このようにすると、コンテナ本体１の内部に伝わる騒音を更によく低減することができる。 1 and 2, the resonance type sound attenuator 2 is attached to the left and right sides and the roof surface of the container main body 1 side by side without any gaps. However, the present invention is not limited to this. You may attach to both sides. In this case, the door 4 shown in FIG. 2 is devised so that it can be opened and closed. Further, a plurality of resonance type sound attenuators 2 may be attached to the bottom surface of the container body 1. If it does in this way, the noise transmitted to the inside of the container main body 1 can further be reduced.
図５は、前記コンテナ本体１の外側面及び屋根面に取り付ける複数個の共鳴型音減衰器２の他の実施形態を示す斜視図である。この実施形態は、上記コンテナ本体１の外側面及び屋根面に複数個設けられる共鳴型音減衰器２を、縦横に隙間なく並べて一体化した複合パネル１０に形成したものである。例えば、図３に示される共鳴型音減衰器２を縦に５個、横に１０個隙間なく並べて相互に接続し、縦Ｄ、横Ｅの寸法を有する大きなパネル状に形成したものである。なお、縦横に並べる複数個の共鳴型音減衰器２の個数は、上述のものに限られず、適宜の個数でよい。 FIG. 5 is a perspective view showing another embodiment of a plurality of resonance type sound attenuators 2 attached to the outer surface and the roof surface of the container body 1. In this embodiment, a plurality of resonant sound attenuators 2 provided on the outer surface and the roof surface of the container main body 1 are formed in a composite panel 10 which is arranged side by side without any gaps. For example, the resonance type sound attenuators 2 shown in FIG. 3 are vertically arranged and connected to each other without gaps, and are formed in a large panel shape having dimensions of vertical D and horizontal E. Note that the number of the plurality of resonance type sound attenuators 2 arranged in the vertical and horizontal directions is not limited to the above, and may be an appropriate number.
また、上記複合パネル１０の大きさは、縦Ｄ、横Ｅの寸法を図１及び図２に示すコンテナ本体１の外側面及び屋根面の縦横の全寸法に合わせてもよいし、該コンテナ本体１の外側面及び屋根面を例えば２分割、４分割、６分割等に分割した寸法に合わせた中型のパネル状としてもよい。さらに、図５に示す縦Ｄ、横Ｅの寸法の大きな箱形を一つ形成し、その内側の空洞部を桟で縦横に仕切って図３に示す個々の空洞部７を形成し、それぞれの中央部に首部９を形成して、共鳴型音減衰器２を複数個形成するようにしてもよい。 Further, the size of the composite panel 10 may be such that the dimensions of the vertical D and the horizontal E are matched to all the vertical and horizontal dimensions of the outer surface and the roof surface of the container main body 1 shown in FIGS. It is good also as a medium-sized panel shape matched with the dimension which divided | segmented the 1 outer side surface and the roof surface into 2 divisions, 4 divisions, 6 divisions etc., for example. Furthermore, one large box shape having the vertical D and horizontal E dimensions shown in FIG. 5 is formed, and the inner cavity is partitioned vertically and horizontally to form individual cavities 7 shown in FIG. A plurality of resonant sound attenuators 2 may be formed by forming a neck portion 9 at the center.
そして、図５に示すように形成された複合パネル１０を、図６に示すように前記コンテナ本体１の外側面及び屋根面に取り付けることにより、本発明による航空機用防音コンテナが構成される。図６においては、コンテナ本体１の左側面に第１の複合パネル１０ａを取り付け、右側面に第２の複合パネル１０ｂを取り付け、屋根面に第３の複合パネル１０ｃを取り付けている。この場合は、上記コンテナ本体１の外側面及び屋根面に複数個の共鳴型音減衰器２を取り付ける作業が、大きな複合パネル１０ａ〜１０ｃを取り付けるだけでよいので、容易となり、防音対策に要する工期を短縮することができる。 And the composite panel 10 formed as shown in FIG. 5 is attached to the outer side surface and roof surface of the said container main body 1 as shown in FIG. 6, and the soundproof container for aircrafts by this invention is comprised. In FIG. 6, the first composite panel 10a is attached to the left side surface of the container body 1, the second composite panel 10b is attached to the right side surface, and the third composite panel 10c is attached to the roof surface. In this case, the work of attaching the plurality of resonance type sound attenuators 2 to the outer surface and the roof surface of the container main body 1 is only required to attach the large composite panels 10a to 10c. Can be shortened.
なお、上記複合パネル１０ａ〜１０ｃは、コンテナ本体１に対して着脱可能としてもよい。このようにすると、コンテナ本体１を航空機に搭載した後に、該コンテナ本体１に複合パネル１０ａ〜１０ｃを取り付けることができる。また、航空機から降ろして陸上で保管したり、他に使用する際には、コンテナ本体１から複合パネル１０ａ〜１０ｃを取り外して軽量な状態でコンテナ本体１のみを取り扱うことができる。 The composite panels 10a to 10c may be detachable from the container body 1. In this way, the composite panels 10a to 10c can be attached to the container body 1 after the container body 1 is mounted on the aircraft. Moreover, when taking down from an aircraft and storing on land or using it for others, the composite panel 10a-10c can be removed from the container main body 1, and only the container main body 1 can be handled in a lightweight state.
なお、図６においては、コンテナ本体１の左側面及び右側面並びに屋根面に、それぞれ第１〜第３の複合パネル１０ａ〜１０ｃを取り付けたものとしたが、上記コンテナ本体１の前側面及び後側面にも他の複合パネル１０を取り付けてもよい。なお、開閉扉４を備えた前側面には、図３に示す個々の共鳴型音減衰器２を複数個取り付けてもよい。 In FIG. 6, the first to third composite panels 10 a to 10 c are attached to the left side surface, the right side surface, and the roof surface of the container main body 1, respectively. Another composite panel 10 may be attached to the side surface. Note that a plurality of individual resonance type sound attenuators 2 shown in FIG. 3 may be attached to the front side surface provided with the door 4.
図７は、前記コンテナ本体１の外側面及び屋根面に取り付ける複数個の共鳴型音減衰器２の更に他の実施形態を示す正面図である。この実施形態は、個々の共鳴型音減衰器２′の平面形状を例えば六角形としたものである。そして、複数個の共鳴型音減衰器２′を、縦横に隙間なく並べて一体化して複合パネル１０に形成したものである。この場合も、複数個の共鳴型音減衰器２′を、それらの外周辺を互いに接して縦横に隙間なく並べることができるので、航空機の発する低周波音を、コンテナ本体１の略全周面で吸収して内部に伝わる騒音を低減することができる。なお、この共鳴型音減衰器２′の平面形状は、矩形状又は六角形に限られず、他の多角形状でもよい。 FIG. 7 is a front view showing still another embodiment of a plurality of resonance type sound attenuators 2 attached to the outer surface and the roof surface of the container body 1. In this embodiment, the planar shape of each resonance type sound attenuator 2 'is, for example, a hexagon. Then, a plurality of resonance type sound attenuators 2 ′ are formed in the composite panel 10 by being arranged side by side with no gap in the vertical and horizontal directions. Also in this case, since a plurality of resonance type sound attenuators 2 'can be arranged in the vertical and horizontal directions with their outer periphery in contact with each other, the low frequency sound emitted from the aircraft can be transmitted to substantially the entire peripheral surface of the container body 1. It is possible to reduce the noise that is absorbed in and transmitted to the inside. The planar shape of the resonance type sound attenuator 2 ′ is not limited to a rectangular shape or a hexagonal shape, and may be another polygonal shape.
なお、上記共鳴型音減衰器２，２′の材料は、木材に限られず、プラスチック等でもよい。航空機用であることからすると、できるだけ軽い材料が望ましい。また、本発明の航空機用防音コンテナは、医療用又は動物用のコンテナだけに限られず、貨物輸送機等に人員を搭乗させて移動する際のＶＩＰ用又は会議用のコンテナとしても利用することができる。 The material of the resonance type sound attenuators 2 and 2 'is not limited to wood, but may be plastic or the like. In light of aircraft use, materials that are as light as possible are desirable. The soundproof container for aircraft according to the present invention is not limited to a medical or animal container, but may be used as a VIP container or a conference container when a passenger is carried on a cargo transporter or the like. it can.
１…コンテナ本体
２，２′…複数個の共鳴型音減衰器
３…側壁部
４…開閉扉
７…空洞部
８…外側板材
９…首部
１０，１０a，１０b，１０c…複合パネル
DESCRIPTION OF SYMBOLS 1 ... Container main body 2, 2 '... Plural resonance type sound attenuator 3 ... Side wall part 4 ... Opening / closing door 7 ... Hollow part 8 ... Outer plate material 9 ... Neck part 10, 10a, 10b, 10c ... Composite panel
Claims (3)
上記コンテナ本体の外側面及び屋根面に複数個設けられ、内側に空洞部を有する箱形に形成され、この箱形の外側板材には内部の空洞部と連通し断面円形の筒状とされて所定長さで外部に突出又は内部に陥没した首部を有する共鳴型音減衰器と、を備え、
上記共鳴型音減衰器の共鳴周波数は、航空機が発する低周波音の周波数と略同一又は近似した値とされたことを特徴とする航空機用防音コンテナ。 A container main body that includes an opening / closing door serving as an entrance / exit on at least one side of the side wall, is capable of being fixed by a fixing device in the aircraft, and accommodates people and animals,
A plurality of outer side surfaces and a roof surface of the container main body are provided and formed into a box shape having a hollow portion inside, and the box-shaped outer plate member has a circular cylindrical shape communicating with the inner hollow portion. A resonance type sound attenuator having a neck projecting outside or recessed inside by a predetermined length;
A soundproof container for an aircraft, wherein the resonance frequency of the resonance type sound attenuator is set to a value that is substantially the same as or approximate to a frequency of a low frequency sound emitted from an aircraft.
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| JP2014164237A (en) * | 2013-02-27 | 2014-09-08 | Taisei Corp | Resonated sound absorbing body |
| JP2014163182A (en) * | 2013-02-27 | 2014-09-08 | Taisei Corp | Porous type sound absorber |
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| JP2015521556A (en) * | 2012-06-18 | 2015-07-30 | モクポ ナショナル マリタイム ユニバーシティ インダストリー − ユニバーシティ コーオペレーション ファンデーション | Soundproof duct for ship propellers using a resonance cylinder |
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| JP2014163182A (en) * | 2013-02-27 | 2014-09-08 | Taisei Corp | Porous type sound absorber |
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