JP3404062B2 - Sound absorbing floor structure for railway vehicles - Google Patents
Sound absorbing floor structure for railway vehiclesInfo
- Publication number
- JP3404062B2 JP3404062B2 JP03451393A JP3451393A JP3404062B2 JP 3404062 B2 JP3404062 B2 JP 3404062B2 JP 03451393 A JP03451393 A JP 03451393A JP 3451393 A JP3451393 A JP 3451393A JP 3404062 B2 JP3404062 B2 JP 3404062B2
- Authority
- JP
- Japan
- Prior art keywords
- floor
- vehicle
- sound
- sound absorbing
- noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011358 absorbing material Substances 0.000 claims description 22
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 239000011796 hollow space material Substances 0.000 claims description 2
- 235000013312 flour Nutrition 0.000 claims 1
- 239000000126 substance Substances 0.000 description 9
- 241000264877 Hippospongia communis Species 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は鉄道車両用の吸音床構造
に関し、車両床下から車両内に伝わる周波数域の異なる
各種騒音を、床板の面密度をほとんど上げることなく効
果的に吸音するのに用いられる。
【０００２】
【従来の技術】従来の鉄道車両では、車両の高速化に伴
い床構造は、〔キーストンプレート〕＋〔床詰物〕＋
〔床敷物〕という質量が重く面密度の高い構成から、
〔台枠〕＋〔床板（Ａｌ板＋Ａｌハニカム＋Ａｌ板）〕
という質量が軽く面密度の低い構成に変えられ、車両の
軽量化が図られていた。
【０００３】
【発明が解決しようとする課題】しかしながら、従来の
ような床構造の変化は、鉄道車両の高速化を達成するの
に適しているが、一般に材料や構造物の音の透過につい
ては、質量の重いものほど遮音効果が大きいという質量
法則があるため、高速化につれて車両の軽量化が図られ
ると、逆に遮音効果が悪くなっていた。
【０００４】しかも、車両の床下からは、高速になると
ともに大きくなる車輪の転動音やモータその他の機器音
が、それぞれ異なる場所から一様な床構造を透過して車
両内に伝わるため、鉄道車両の高速化・軽量化に伴い、
車両の床構造は、遮音効果が著しく悪くなるだけでな
く、車両床下から車両内に伝わる周波数域の異なる各種
騒音を吸音によって一様に低下させることができなかっ
た。
【０００５】本発明はこれらの事情に鑑みてなされたも
ので、高速走行時において車両床下から車両内に伝わろ
うとする各種騒音源からの周波数域の異なる騒音を、車
両の高速化や軽量化を損なうことなく、また、従来の車
両から容易に改良することができるようにした鉄道車両
用の吸音床構造の提供を目的としたものである。
【０００６】
【課題を解決するための手段】本発明は、前記目的を達
成すべくなされたもので、縦仕切の入った中空の床板で
形成された床構造であって、中空内には、床下の各種騒
音源から伝わる騒音周波数域の吸音に優れた超軽量の吸
音物質が、それぞれの対応する範囲に封入され、中空内
に封入される吸音物質は、その一部または全部が粉体層
と多孔質層の二層構造からなり、粉体層を構成する粉体
と、多孔質層を構成する多孔質吸音材からなる非粉体の
割合を場所により変えたことを特徴とする鉄道車両用の
吸音床構造である。
【０００７】
【作用】鉄道車両の床板を構成する縦仕切の入った中空
の床板内には、床下の騒音源であるモータその他の機器
類や車輪などの上側に、これらが発生するそれぞれの周
波数域の騒音を吸音するのに適する吸音物質が封入され
ているため、床下から車両内に伝わる各種騒音は防止さ
れる。
【０００８】また、床構造は、中空の床板からなるの
で、各種騒音源の上側に位置する床板の中空内にそれら
の騒音に適する吸音物質を封入するだけでよいから、従
来の車両の改良も容易である。しかも、吸音には各騒音
源が発生するそれぞれの周波数域に適する超軽量の吸音
物質が用いられるため、高速化に伴って要求される車両
の軽量化は損なわれない。
【０００９】
【実施例】以下、本発明に係る実施例を図面に基づいて
説明する。図１および図２は本発明の一実施例を示した
もので、鉄道車両用の吸音床構造は、車両の床部１と超
軽量の吸音物質２とから主として構成されている。
【００１０】車両の床部１は、アルミニウム型材の台枠
１Ａと、アルミニウム製のハニカム１ａの上下両端部を
アルミニウム製のプレート１ｂ，１ｂにより遮閉した床
板パネル（床板）１Ｂと、この床板１Ｂの上側に載置さ
れる床敷物１Ｃとからなり、鉄道車両の高速化や軽量化
を図るのに適した構造となっている。
【００１１】床部１の下側には、各種周波数域の騒音を
発するモータや車輪や圧空機器などの騒音源が、それぞ
れ異なる位置に設けられている。これらの騒音源から発
せられるモータの回転音や車輪の転動音や圧空機器その
他からの機器音などは、それらの上側の床部１を通して
車両内に伝えられる。
【００１２】車両内に伝えられるこれらの騒音をできる
だけ少なくするため、各騒音源が発する周波数域の騒音
を吸音するのに優れた超軽量の吸音物質２が、各騒音源
の伝わる広さに対応した複数個の前記ハニカム１ａ内に
それぞれ封入されている。
【００１３】吸音物質２としては、グラスウール、ロッ
クウール、各種発泡プラスチック材、または、ホワイト
カーキンやタルクなどの各粉体を用いることができる。
吸音物質２の選択にあたっては、吸音しようとする騒音
の周波数域が低周波域であるか高周波域であるかによっ
て、吸音物質２の１次吸音ピークが低周波側にあるか高
周波側にあるものから選ぶようにすればよい。
【００１４】上記実施例において、車両の床部１を構成
する前記ハニカム１ａ内に、高周波域の吸音に適する吸
音物質２Ａと、中間周波数域の吸音に適する吸音物質２
Ｂと、低周波域の吸音に適する吸音物質２Ｃとを図２に
示すように封入したとすると、床下から車両内に伝わろ
うとする高周波域の騒音は吸音物質２Ａによって吸音さ
れ、中間周波数域の騒音は吸音物質２Ｂによって吸音さ
れるとともに、低周波域の騒音は吸音物質２Ｃによって
吸音されるため、車両内に伝わろうとする各周波数域の
騒音を合理的に吸音して車両の乗り心地を良くすること
ができる。
【００１５】また、アルミニウム製のハニカム１ａ内に
封入される吸音物質２は、車両重量に比べて著しく軽量
なので、高速化に要求される車両の軽量化を損なうこと
なく、床下から伝わる各周波数域の騒音を防止すること
ができる。
【００１６】しかも、吸音物質２は、車両の軽量化を図
った従来の床構造のアルミニウム製のハニカム１ａ内に
封入することができるので、床板１Ｂを新たに開発しな
くてもよくなる。このため、この実施例の構成は、従来
の車両を改良するのにも適用することができる。
【００１７】図３は本発明の他の実施例を示したもの
で、前記実施例におけるハニカム１ａの一部または全部
に、粉体と非粉体の割合を変えた二層構造の吸音物質２
Ｄ〜２Ｆを封入した場合である。非粉体の吸音物質とし
ては、多孔質吸音材を用いるのがよい。
【００１８】この構成は、二層構造の吸音物質２Ｄ〜２
Ｆの吸音特性が、各構成要素の割合を変えることにより
低周波域の音波を吸収する方向にシフトするのを利用し
たもので、車両の床下において発生した低周波域の騒音
が車両内に伝わるのを効果的に防止することができる。
なお、本発明の吸音床構造は、鉄道車輌の床構造の全体
に適用してもよいが、一部に適用してもよい。
【００１９】
【発明の効果】本発明は上述の通り構成されているの
で、次に記載する作用効果を奏する。
【００２０】（１）請求項１に記載の鉄道車両用の吸音
床構造においては、鉄道車両の床板を構成する中空の空
間部に、床下の各種騒音源から伝わる異なる騒音周波数
域の吸音に優れた超軽量の吸音物質が、それぞれの対応
する範囲に封入されているので、床板を通って床下から
車両内に伝わろうとする周波数域の異なる各種騒音源か
らの騒音は、車両の高速化や軽量化を損なう程の重量増
加を伴うことなく、効果的に吸音することができ、車両
の乗り心地を良くすることができる。
【００２１】しかも、吸音物質は従来の車両と同じ構成
を有する床板の中空内に封入されているので、本発明は
新車の場合に適用できるだけでなく、従来の車両も容易
に改良することができるという実用上の優れた作用効果
を奏する。
【００２２】（２）請求項１に記載の鉄道車両用の吸音
床構造においては、中空内に封入される吸音物質は、そ
の一部または全部が粉体層と多孔質層の二層構造からな
っているので、各層についての吸音周波数域より低い周
波数域の騒音が床下から車両内に伝わるのを防止するこ
とができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound-absorbing floor structure for a railway vehicle, and reduces various noises transmitted from under the floor of the vehicle into the vehicle in different frequency ranges to reduce the surface density of the floor panel. Used to effectively absorb sound without raising. 2. Description of the Related Art In a conventional railway vehicle, the floor structure is [keystone plate] + [floor filling] +
Because of the mass of [floor rug] and heavy surface density,
[Base frame] + [Floor plate (Al plate + Al honeycomb + Al plate)]
Was changed to a lighter, lower areal density configuration, thereby reducing the weight of the vehicle. [0003] However, a change in the floor structure as in the prior art is suitable for achieving a higher speed of a railway vehicle, but generally, the sound transmission of materials and structures is not considered. However, since there is a law of mass that the heavier the mass, the greater the sound insulation effect is, if the vehicle is made lighter as the speed increases, the sound insulation effect becomes worse. In addition, since the rolling noise of the wheels and the noise of motors and other devices that increase with the speed increase from below the floor of the vehicle, are transmitted from different places through the uniform floor structure and into the vehicle. As vehicles become faster and lighter,
In the floor structure of a vehicle, not only the sound insulation effect is remarkably deteriorated, but also various kinds of noises having different frequency ranges transmitted from under the vehicle floor into the vehicle cannot be reduced uniformly by sound absorption. The present invention has been made in view of the above circumstances, and is intended to reduce the noise in different frequency ranges from various noise sources that are transmitted from under the floor of the vehicle to the inside of the vehicle during high-speed running, thereby increasing the speed and weight of the vehicle. It is an object of the present invention to provide a sound absorbing floor structure for a railway vehicle, which can be easily improved without damaging the conventional vehicle. SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and has a floor structure formed by a hollow floor plate having a vertical partition. Ultra-lightweight sound-absorbing material with excellent sound absorption in the noise frequency range transmitted from various noise sources under the floor is enclosed in the corresponding area, and the sound-absorbing material enclosed in the hollow part or all is a powder layer. Ri Do a two-layer structure of the porous layer, the powder constituting the powder layer
And a non-powder made of a porous sound absorbing material constituting a porous layer.
A sound absorbing floor structure for a railway vehicle, wherein the ratio is changed depending on the location . [0007] In a hollow floor plate containing vertical partitions constituting a floor plate of a railway vehicle, the frequency at which each of these frequencies is generated is above a motor or other equipment or a wheel which is a noise source under the floor. Since the sound absorbing material suitable for absorbing the noise of the area is enclosed, various noises transmitted from under the floor into the vehicle are prevented. Further, since the floor structure is formed of a hollow floor plate, it is only necessary to enclose a sound absorbing material suitable for the noise in the hollow of the floor plate located above the various noise sources. Easy. In addition, since ultra-lightweight sound absorbing materials suitable for the respective frequency ranges generated by the respective noise sources are used for sound absorption, the reduction in vehicle weight required with the increase in speed is not impaired. An embodiment according to the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show an embodiment of the present invention. A sound absorbing floor structure for a railway vehicle mainly includes a floor 1 of a vehicle and an ultralight sound absorbing material 2. The floor 1 of the vehicle includes an underframe 1A made of aluminum, a floor panel 1B in which the upper and lower ends of an aluminum honeycomb 1a are closed by aluminum plates 1b, 1b, and a floor 1B. And a floor covering 1C mounted on the upper side of the vehicle, and has a structure suitable for speeding up and reducing the weight of a railway vehicle. On the lower side of the floor 1, noise sources such as motors, wheels, and pneumatic devices that emit noise in various frequency ranges are provided at different positions. The rotation noise of the motor, the rolling noise of the wheels, the equipment noise from the compressed air equipment and the like generated from these noise sources are transmitted into the vehicle through the floor 1 above them. In order to minimize these noises transmitted to the vehicle, an ultra-light absorbing material 2 which is excellent in absorbing the noise in the frequency range generated by each noise source corresponds to the size of each noise source. Are enclosed in the plurality of honeycombs 1a. As the sound absorbing substance 2, glass wool, rock wool, various foamed plastic materials, or powders such as white carkin and talc can be used.
When selecting the sound absorbing substance 2, the primary sound absorbing peak of the sound absorbing substance 2 is on the low frequency side or on the high frequency side, depending on whether the frequency range of the noise to be absorbed is a low frequency range or a high frequency range. You can choose from. In the above embodiment, a sound absorbing material 2A suitable for sound absorption in a high frequency range and a sound absorbing material 2A suitable for sound absorption in an intermediate frequency range are provided in the honeycomb 1a constituting the floor 1 of the vehicle.
Assuming that B and a sound absorbing material 2C suitable for sound absorption in a low frequency region are enclosed as shown in FIG. 2, noise in a high frequency region that is transmitted from under the floor into the vehicle is absorbed by the sound absorbing material 2A, and noise in the intermediate frequency region is absorbed. Since the noise is absorbed by the sound absorbing material 2B and the low frequency noise is absorbed by the sound absorbing material 2C, the noise in each frequency range to be transmitted to the vehicle is rationally absorbed to improve the riding comfort of the vehicle. can do. Further, since the sound absorbing material 2 enclosed in the honeycomb 1a made of aluminum is significantly lighter than the weight of the vehicle, each frequency band transmitted from under the floor without impairing the weight reduction of the vehicle required for high speed operation. Noise can be prevented. Moreover, since the sound absorbing substance 2 can be sealed in the aluminum honeycomb 1a having the conventional floor structure for reducing the weight of the vehicle, it is not necessary to newly develop the floor plate 1B. Therefore, the configuration of this embodiment can be applied to improve a conventional vehicle. FIG. 3 shows another embodiment of the present invention. A part or all of the honeycomb 1a in the above embodiment is provided with a two-layered sound absorbing material 2 having a different ratio of powder and non-powder.
D to 2F are enclosed. As the non-powder sound absorbing material, a porous sound absorbing material is preferably used. This structure has two-layered sound absorbing materials 2D to 2D.
The sound absorption characteristic of F utilizes the shift in the direction of absorbing low-frequency sound waves by changing the ratio of each component, and low-frequency noise generated under the floor of the vehicle is transmitted into the vehicle. Can be effectively prevented.
The sound-absorbing floor structure of the present invention may be applied to the entire floor structure of a railway vehicle, or may be applied to a part thereof. Since the present invention is configured as described above, the following operational effects can be obtained. (1) In the sound absorbing floor structure for a railway vehicle according to the first aspect, the hollow space constituting the floor plate of the railway vehicle has excellent sound absorption in different noise frequency ranges transmitted from various noise sources under the floor. The ultra-lightweight sound-absorbing substances are enclosed in the corresponding areas, so that noise from various noise sources in different frequency ranges that are transmitted from under the floor through the floorboard into the vehicle can be used to increase the speed and reduce the weight of the vehicle. Sound absorption can be performed effectively without increasing the weight of the vehicle, and the riding comfort of the vehicle can be improved. In addition, since the sound absorbing material is sealed in the hollow of the floorboard having the same configuration as that of the conventional vehicle, the present invention can be applied not only to a new vehicle but also to a conventional vehicle. It has excellent practical effects. (2) In the sound absorbing floor structure for a railway vehicle according to the first aspect , the sound absorbing substance enclosed in the hollow is partially or entirely formed of a two-layer structure of a powder layer and a porous layer. Therefore, it is possible to prevent noise in a frequency range lower than the sound absorption frequency range of each layer from being transmitted from under the floor into the vehicle.
【図面の簡単な説明】
【図１】本発明の一実施例の構成を示す斜視図である。
【図２】中空内に封入される吸音物質の配列の一例を示
す平面図である。
【図３】本発明の他の実施例の構成を示す斜視図であ
る。
【符号の説明】
１Ｂ 床板（床板パネル）
１ａ ハニカム
２，２Ａ〜２Ｃ 吸音物質
２Ｄ〜２Ｆ 二層構造の吸音物質BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a configuration of an embodiment of the present invention. FIG. 2 is a plan view showing an example of an arrangement of a sound absorbing substance sealed in a hollow. FIG. 3 is a perspective view showing a configuration of another embodiment of the present invention. [Description of Signs] 1B Floorboard (floorboard panel) 1a Honeycomb 2, 2A-2C Sound-absorbing substance 2D-2F Sound-absorbing substance with two-layer structure
フロントページの続き (56)参考文献 特開 平１−269663（ＪＰ，Ａ) 特開 昭61−115780（ＪＰ，Ａ) 特開 昭60−234065（ＪＰ，Ａ) 特開 平４−314098（ＪＰ，Ａ) 実開 平２−149369（ＪＰ，Ｕ) 実開 平４−23571（ＪＰ，Ｕ) 実開 平５−5443（ＪＰ，Ｕ) 実開 昭52−126802（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B61D 17/18 B32B 3/12 B61D 17/10 G10K 11/16 Continuation of front page (56) References JP-A-1-269633 (JP, A) JP-A-61-115780 (JP, A) JP-A-60-234065 (JP, A) JP-A-4-314098 (JP) , A) Japanese Utility Model 149369 (JP, U) Japanese Utility Model 4-23571 (JP, U) Japanese Utility Model 5-5443 (JP, U) Japanese Utility Model 52-126802 (JP, U) (58) Field surveyed (Int.Cl. 7 , DB name) B61D 17/18 B32B 3/12 B61D 17/10 G10K 11/16
Claims (1)
床構造であって、 中空内には、床下の各種騒音源から伝わる騒音周波数域
の吸音に優れた超軽量の吸音物質が、それぞれの対応す
る範囲に封入され、 中空内に封入される吸音物質は、その一部または全部が
粉体層と多孔質層の二層構造からなり、 粉体層を構成する粉体と、多孔質層を構成する多孔質吸
音材からなる非粉体の割合を場所により変えた ことを特
徴とする鉄道車両用の吸音床構造。(57) [Claims] [Claim 1] A floor structure formed by a hollow floor plate with a vertical partition, and inside the hollow space, a sound absorption in a noise frequency range transmitted from various noise sources under the floor is provided. excellent in lightweight sound-absorbing material, is encapsulated in a range each corresponding sound absorbing material to be enclosed in the hollow, Ri partially or entirely Do a two-layer structure of the powder layer and the porous layer, flour The powder that forms the body layer and the porous absorption that forms the porous layer
A sound absorbing floor structure for railway vehicles, characterized in that the proportion of non-powder made of sound material is changed depending on the location .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03451393A JP3404062B2 (en) | 1993-01-28 | 1993-01-28 | Sound absorbing floor structure for railway vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03451393A JP3404062B2 (en) | 1993-01-28 | 1993-01-28 | Sound absorbing floor structure for railway vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06219272A JPH06219272A (en) | 1994-08-09 |
| JP3404062B2 true JP3404062B2 (en) | 2003-05-06 |
Family
ID=12416350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03451393A Expired - Lifetime JP3404062B2 (en) | 1993-01-28 | 1993-01-28 | Sound absorbing floor structure for railway vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3404062B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005271759A (en) * | 2004-03-25 | 2005-10-06 | Yokohama Seiki Kk | Interior panel for vehicle |
| JP5380766B2 (en) * | 2006-06-05 | 2014-01-08 | 横浜ゴム株式会社 | Honeycomb sandwich panel with soundproofing properties |
| JP5210505B2 (en) * | 2006-07-12 | 2013-06-12 | 横浜ゴム株式会社 | Honeycomb sandwich panel with soundproofing properties |
| CN107200031A (en) * | 2017-04-26 | 2017-09-26 | 农思宇 | A kind of decorative panel for railway carriage |
| CN108615519B (en) * | 2018-04-27 | 2023-10-20 | 北京石墨烯技术研究院有限公司 | Graphene porous sound insulation and noise reduction material |
-
1993
- 1993-01-28 JP JP03451393A patent/JP3404062B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06219272A (en) | 1994-08-09 |
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