JPH1183145A - Box type muffler - Google Patents
Box type mufflerInfo
- Publication number
- JPH1183145A JPH1183145A JP9257702A JP25770297A JPH1183145A JP H1183145 A JPH1183145 A JP H1183145A JP 9257702 A JP9257702 A JP 9257702A JP 25770297 A JP25770297 A JP 25770297A JP H1183145 A JPH1183145 A JP H1183145A
- Authority
- JP
- Japan
- Prior art keywords
- box
- sound absorbing
- box type
- absorbing plate
- acoustic board
- 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.)
- Pending
Links
- 239000012779 reinforcing material Substances 0.000 claims abstract description 10
- 230000003584 silencer Effects 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 24
- 230000002093 peripheral effect Effects 0.000 claims description 17
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000030279 gene silencing Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 abstract description 10
- 230000001070 adhesive effect Effects 0.000 abstract description 10
- 230000004888 barrier function Effects 0.000 abstract 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 20
- 239000010959 steel Substances 0.000 description 20
- 239000011358 absorbing material Substances 0.000 description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 8
- 239000002994 raw material Substances 0.000 description 7
- 239000002002 slurry Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 239000011491 glass wool Substances 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 208000029152 Small face Diseases 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010922 glass waste Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Duct Arrangements (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、鉄道、工場あるい
は飛行場等の周辺において、屋外からの激しい騒音を消
音するとともに建物内の空気を換気するための箱形消音
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box type silencer for silencing intense outdoor noise and ventilating air inside a building in the vicinity of a railway, factory or airfield.
【０００２】[0002]
【従来の技術】屋外からの激しい騒音を消音するととも
に建物内の空気を換気する従来の箱形消音装置２０は、
図４に示すようにＬ型鋼によって箱形に組まれた枠体２
４に厚さ１．６ｍｍ程度の亜鉛鋼板２３で周壁用吸音板
２１ｂと内部中央部の隔壁用吸音板２１ａとを形成させ
ている。また箱形消音装置２０の対向する小口面上に空
気出入口８、９が設けられ、さらにその周壁用吸音板２
１ｂの内側片面及び隔壁用吸音板２１ａの両面は、グラ
スウールあるいはロックウールの繊維系の吸音材２２が
接着材あるいはビスにより貼着された構造になってい
る。その繊維系の吸音材２２は、吸湿により垂れ下がり
隙間が生じて吸音性能が劣化し易いため多孔質コンクリ
ート材が使われる場合もある。（図示せず。）2. Description of the Related Art A conventional box type silencer 20 that silences intense noise from the outside and ventilates the air in a building includes:
As shown in FIG. 4, a frame 2 assembled in a box shape by L-shaped steel
4, a sound absorbing plate 21b for the peripheral wall and a sound absorbing plate 21a for the partition at the inner central portion are formed by a zinc steel plate 23 having a thickness of about 1.6 mm. Further, air inlets and outlets 8 and 9 are provided on opposed small surfaces of the box-shaped silencer 20, and the sound absorbing plate 2 for the peripheral wall is further provided.
One side inside 1b and both sides of the sound absorbing plate 21a for the partition have a structure in which a fiber-based sound absorbing material 22 of glass wool or rock wool is stuck with an adhesive or a screw. As the fiber-based sound absorbing material 22, a porous concrete material may be used because a sound-absorbing performance is easily deteriorated due to a dripping gap caused by moisture absorption. (Not shown)
【０００３】これらの繊維系の吸音材２２や多孔質コン
クリート材の吸音材を使用して箱形消音装置２０を構成
する際は、図４に示すように、次のような理由から、大
きい亜鉛鉄板などの補強用鋼板２３が用いられる。すな
わち、繊維系の吸音材２２は柔軟であるため、それのみ
では箱形消音装置２０の吸音板２１を構成することがで
きず、また、多孔質コンクリート材の吸音材は脆いため
吸音板を大きくすることができず、従って、大きい補強
用鋼板２３に小型の多孔質コンクリート材の吸音板を多
数枚張り付けて構成していた。また、密度の軽くなった
空気は上昇して換気し易いため、箱形消音装置は天井面
より吊り下げ型が多い。[0003] When a box-shaped silencer 20 is constructed using these fiber-based sound absorbing materials 22 and porous concrete sound absorbing materials, as shown in FIG. A reinforcing steel plate 23 such as an iron plate is used. That is, since the fiber-based sound absorbing material 22 is flexible, the sound absorbing plate 21 of the box-shaped silencer 20 cannot be constituted by itself, and the sound absorbing material of the porous concrete material is brittle, so that the sound absorbing plate is large. Therefore, a large number of small sound absorbing plates made of a porous concrete material are attached to the large reinforcing steel plate 23. In addition, since the air whose density has become light rises and is easily ventilated, the box type silencer is often of a hanging type rather than a ceiling surface.
【０００４】[0004]
【発明が解決しようとする課題】この箱形消音装置２０
の周壁用吸音板２１ｂを構成している鋼板２３は、吸音
材２２を貼着させる補強材としての機能を併せ持ってい
るため、主に吊り下げ用として軽量化が望まれる箱形消
音装置２０であっても、重量のある鋼板２３を使用せざ
るを得なかった。また、枠体２４及び鋼板２３を箱形に
組み立てた後、内部に接着材あるいはビスにより吸音材
２２を貼着させる構造は、施工に手間がかかるとともに
重量のある鋼板２３の取り扱いも面倒であった。しか
も、多孔質コンクリートを用いても多数枚張り付ける必
要があるため、施工性低下及び取付部材数の増加等から
コストアップになるという問題もあった。SUMMARY OF THE INVENTION
Since the steel plate 23 constituting the sound absorbing plate 21b for the peripheral wall also has a function as a reinforcing material to which the sound absorbing material 22 is adhered, the box-shaped silencer 20 whose lightening is desired mainly for hanging is desired. Even so, a heavy steel plate 23 had to be used. In addition, the structure in which the frame 24 and the steel plate 23 are assembled into a box shape and then the sound absorbing material 22 is adhered to the inside with an adhesive or a screw requires a lot of work for the construction, and the handling of the heavy steel plate 23 is troublesome. Was. In addition, even if porous concrete is used, it is necessary to attach a large number of pieces, so that there is a problem that the workability is lowered and the number of mounting members is increased, thereby increasing the cost.
【０００５】さらに、鋼板２３を周壁用吸音板２１ｂに
使用しているため外気と屋内との温度差により鋼板２３
表面に結露が生じて水滴が屋内に落ちたり、屋内の音が
鋼板２３表面で反射したりするという問題点があった。
そこで、本発明の課題は、この鋼板を省略して上記問題
点をなくし、また施工効率を向上、軽量化、結露発生防
止、さらにコスト低下が可能となる箱形消音装置を提供
することを目的とする。Further, since the steel plate 23 is used for the sound absorbing plate 21b for the peripheral wall, the temperature difference between the outside air and the indoor space causes the steel plate 23 to be used.
There has been a problem that dew condensation occurs on the surface and water droplets fall indoors, and indoor sounds are reflected on the surface of the steel plate 23.
Therefore, an object of the present invention is to eliminate the above-mentioned problems by omitting the steel plate and to provide a box-shaped silencer capable of improving construction efficiency, reducing weight, preventing dew condensation, and further reducing costs. And
【０００６】[0006]
【課題を解決するための手段】本発明は前記課題を解決
するために、屋外用と屋内用の空気出入口を備えるとと
もに内部に蛇行した空気流通路を形成させる隔壁が配設
されており、屋外騒音の消音機能と換気機能とを併せも
つ箱型消音装置であって、該箱型消音装置の少なくとも
隔壁及び周壁は補強材が埋設された多孔質コンクリート
材より成る吸音板である箱型消音装置の構成とした。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an outdoor and indoor air inlet / outlet and a partition for forming a meandering air flow passage therein. A box-type silencer having both a noise-muffling function and a ventilation function, wherein at least a partition wall and a peripheral wall of the box-type silencer are sound-absorbing plates made of a porous concrete material in which a reinforcing material is embedded. Configuration.
【０００７】以下に本発明の作用を説明する。本発明に
係わる吸音板は、多孔質コンクリート材から成る吸音板
内に鉄筋等の補強材が埋設されているため、その吸音板
の曲げ強度は非常に大きくなる。従って、この吸音板を
箱形消音装置内部の空気流通路を形成させる隔壁用吸音
板に使用した場合、補強用の鋼板が必要なくなる。The operation of the present invention will be described below. In the sound-absorbing plate according to the present invention, since a reinforcing material such as a reinforcing bar is embedded in the sound-absorbing plate made of a porous concrete material, the bending strength of the sound absorbing plate becomes extremely large. Therefore, when this sound absorbing plate is used as a sound absorbing plate for a partition wall that forms an air flow passage inside a box-shaped silencer, no reinforcing steel plate is required.
【０００８】さらに、この吸音板を用いて箱型消音装置
の周壁用吸音板を構成すれば、従来周壁用吸音板を構成
していた鋼板及びそれらを取り付けていた枠体をなくす
ことが可能となる。そして、この重い鋼板及び枠体がな
くなることにより、それ自身の施工が不要になるととも
に、吸音板を鋼板に貼着する必要もなくなるため施工性
が大幅に向上し、コストも低下する。また、周壁用吸音
板が屋内の騒音を表面で吸音する役目も果たすことがで
きる。Further, if the sound absorbing plate for the peripheral wall of the box type silencer is constituted by using the sound absorbing plate, it is possible to eliminate the steel plate and the frame body to which the conventional sound absorbing plate for the peripheral wall is attached. Become. The removal of the heavy steel plate and the frame eliminates the necessity of the construction itself, and eliminates the necessity of attaching the sound absorbing plate to the steel plate, thereby greatly improving the workability and reducing the cost. Further, the sound absorbing plate for the peripheral wall can also serve to absorb indoor noise on the surface.
【０００９】また、本発明に係わる吸音板は断熱性があ
るため、本発明の箱形消音装置の周壁吸音板表面では内
外気の温度差による結露を生じることはなくなる。その
上、本発明の箱形消音装置では、グラスウールを吸音材
に使用した従来の物に比べて全体重量が軽量化されて、
吊り下げ部分への負担が軽減される。Further, since the sound absorbing plate according to the present invention has a heat insulating property, dew condensation due to a temperature difference between the inside and outside air does not occur on the surface of the sound absorbing plate on the peripheral wall of the box type silencer of the present invention. In addition, in the box-shaped silencer of the present invention, the overall weight is reduced as compared with the conventional one using glass wool as a sound absorbing material,
The burden on the hanging part is reduced.
【００１０】[0010]
【発明の実施の形態】以下、本発明を図に示す実施形態
に基づいて説明する。なお、符号は従来例と同一のもの
は同一番号を付した。図１において、本発明の箱形消音
装置１は、内部に補強材３が埋設された多孔質コンクリ
ート材の吸音板２で構成されており、その隔壁用吸音板
２ａは内部にＬ型鋼材４及び接着材により箱形消音装置
１の長さ方向と垂直に固定され、各々の周壁用吸音板２
ｂは図２に示すように接着材及びスクリュウ釘５により
固定され箱形に組み立てられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. In addition, the same code | symbol is attached | subjected to the code | symbol same as a conventional example. In FIG. 1, a box-shaped silencer 1 according to the present invention comprises a sound absorbing plate 2 made of a porous concrete material in which a reinforcing material 3 is buried, and a sound absorbing plate 2a for a partition wall has an L-shaped steel material 4 inside. The sound absorbing plate 2 for each peripheral wall is fixed perpendicularly to the length direction of the box-shaped silencer 1 by an adhesive and an adhesive.
b is fixed by an adhesive and a screw nail 5 as shown in FIG. 2 and assembled in a box shape.
【００１１】また、この箱形消音装置１は、枠型の吊り
下げ金具６及びロープ７によって天井（図示せず）等に
吊り下げられている。さらに、箱形消音装置１の両小口
面には、空気出入口８、９が開口されており、ダクト１
０等により屋外に接続されて開口している。以上の箱形
消音装置１において屋外側の空気出入口８から入った空
気は、内部の隔壁用吸音板２ａに邪魔されるため蛇行し
た空気流通路を通りながら、もう一方の屋内側の空気出
入口９より屋内に排気される。また、同様にして屋内の
空気が屋外に排気されることになり、屋内が換気され
る。The box-shaped silencer 1 is suspended from a ceiling (not shown) or the like by a frame-shaped suspension fitting 6 and a rope 7. Further, air inlets and outlets 8 and 9 are opened in both small faces of the box-shaped silencer 1 so that the duct 1
It is connected to the outside by 0 or the like and opened. In the above box-shaped silencer 1, the air entering from the outdoor air inlet / outlet 8 passes through the meandering air flow passage because it is obstructed by the internal sound absorbing plate 2a for the inside, while the other indoor air inlet / outlet 9 is provided. It is exhausted more indoors. Similarly, indoor air is exhausted to the outside, and the room is ventilated.
【００１２】そして、屋外から入った騒音は、箱形消音
装置１内部の隔壁用吸音板２ａによって箱形消音装置１
内の直線的な伝搬が阻止されるとともに吸音され、その
反射音が周壁吸音板２ｂによって吸音され消音してい
く。これによって、箱形消音装置１は屋外騒音の消音機
能と換気機能を併せ持つことができる。さらに本発明の
箱形消音装置１を屋内に設置した場合、屋内で発生する
騒音についても周壁用吸音板２ｂにより吸音することが
できる。[0012] The noise entering from outside is blocked by the box-shaped silencer 1 a inside the box-shaped silencer 1.
The linear propagation in the inside is blocked and the sound is absorbed, and the reflected sound is absorbed by the peripheral wall sound absorbing plate 2b and is attenuated. Thereby, the box-shaped silencer 1 can have both the silencing function of outdoor noise and the ventilation function. Furthermore, when the box-shaped silencer 1 of the present invention is installed indoors, noise generated indoors can also be absorbed by the peripheral wall sound absorbing plate 2b.
【００１３】本発明に係わる吸音板２を構成する多孔質
コンクリート材としては、特に限定されないが次の２つ
の方法で得られるものが好適である。１つは、ケイ酸質
および石灰質を主原料とする原料スラリーへ、別に作っ
た気泡を混合するプレフォーム法または前記原料スラリ
ーを泡立てて気泡を形成するミックス・フォーム法によ
り原料スラリーと気泡を混合させる、あるいは前記原料
スラリー中に混入させたアルミニウム金属粉末等の発泡
材を発泡させることにより、連続気泡を内部に形成した
半硬化体を造る。そして、その半硬化体を１４０℃以上
の飽和水蒸気雰囲気のオートクレーブ養生することによ
って得られる多孔質コンクリート材である。The porous concrete material constituting the sound absorbing plate 2 according to the present invention is not particularly limited, but those obtained by the following two methods are preferable. One is to mix the raw slurry and the foam by the preform method of mixing the separately produced air bubbles with the raw slurry mainly composed of siliceous and calcareous materials or the mix foam method of foaming the raw material slurry to form the air bubbles. Or by bubbling a foaming material such as aluminum metal powder mixed into the raw material slurry, thereby producing a semi-cured body in which open cells are formed. And it is a porous concrete material obtained by subjecting the semi-cured body to autoclave curing in a saturated steam atmosphere of 140 ° C. or higher.
【００１４】もう１つは、サブミリ〜数ミリまでの天然
あるいは人工の細骨材をセメント等のバインダーで連結
させて得られる多孔質コンクリート材である。細骨材に
は、タイル、陶磁器クズ、ガラスクズ、膨張頁岩等があ
り、バインダーとしては水ガラス、セメント等が適用さ
れる。The other is a porous concrete material obtained by connecting natural or artificial fine aggregates of a sub-millimeter to several millimeters with a binder such as cement. Fine aggregates include tiles, ceramic waste, glass waste, expansive shale, and the like, and water glass, cement, and the like are applied as binders.
【００１５】前者の方法で製造された多孔質コンクリー
ト材の場合、その気乾状態の嵩比重が０．２５〜０．５
であるとともに連続気泡が３０％以上を有していること
がより好ましい。すなわち連続気泡が３０％以上を有す
ると吸音性能がより優れるようになり、又嵩比重が０．
２５〜０．５の範囲のものは軽量でかつ剛体としての強
度もあり十分なものとなる。In the case of the porous concrete material manufactured by the former method, the air-dried bulk specific gravity is 0.25 to 0.5.
More preferably, the open cells have at least 30%. That is, when the open cells have 30% or more, the sound absorbing performance becomes more excellent, and the bulk specific gravity is 0.1%.
Those having a range of 25 to 0.5 are lightweight and have sufficient strength as a rigid body.
【００１６】埋設される補強材３は、鉄筋、金網、ラス
網、炭素繊維あるいはアラミド繊維の集束物等が用いら
れ得るが、特に鉄筋が十分な強度を有するとともにコス
トが安く好ましい。さらに、補強材３は、図１のように
マット状として吸音板２内に埋設させるが、カゴ状（図
示せず）にして強度アップすることがより望ましい。As the reinforcing material 3 to be buried, a reinforcing bar, a wire net, a lath net, a bundle of carbon fibers or aramid fibers, or the like can be used. In particular, the reinforcing bar preferably has sufficient strength and is low in cost. Further, the reinforcing member 3 is buried in the sound absorbing plate 2 in a mat shape as shown in FIG. 1, but it is more preferable that the reinforcing member 3 is formed in a cage shape (not shown) to increase the strength.
【００１７】さらに本発明においては、図３（イ）、
（ロ）に示すように吸音板２表面に直線あるいは曲線的
な凹凸模様を設けることが、吸音面積がさらに増加し
て、より高い吸音性能が得られるようになり好ましい。
ここで山部ａ：３０〜４５ｍｍ、谷部ｂ：２０〜３０ｍ
ｍ、傾斜部ｃ：１０〜２０ｍｍ、深さｄ：１５〜３０ｍ
ｍである凹凸とすることにより表面積が平らなものに比
べて約４０％以上増加し、ＪＩＳ Ａ １４０９に準じ
た残響室吸音率の測定方法の結果では、中心周波数２５
０Ｈｚ〜４ｋＨｚにおいて吸音率が１０％以上向上す
る。。Further, in the present invention, FIG.
As shown in (b), it is preferable to provide a linear or curved concavo-convex pattern on the surface of the sound absorbing plate 2 because the sound absorbing area is further increased and higher sound absorbing performance can be obtained.
Here, a peak a: 30 to 45 mm, a valley b: 20 to 30 m
m, inclined portion c: 10 to 20 mm, depth d: 15 to 30 m
m, the surface area is increased by about 40% or more as compared with a flat surface. According to the measurement method of the reverberation chamber sound absorption coefficient according to JIS A 1409, the center frequency is 25%.
At 0 Hz to 4 kHz, the sound absorption coefficient is improved by 10% or more. .
【００１８】また、枠体１１を全くなくして接着材及び
スクリュウ釘５により吸音板２を箱形消音装置として組
み立てることもできるが、ねじ部を有する埋設金具１２
が補強材３に固定された吸音板２を用いて、その埋設金
具１２に取付金具１３が挟持されるようにボルトを螺合
させて吸音板２同士を組み立てることも施工上好まし
い。また、長手方向の長さが１５００ｍｍを越える箱形
消音装置１は、図２（イ）に示すように両端の４角形の
枠体１１を用いた方が組立が容易となり好ましい。Further, the sound absorbing plate 2 can be assembled as a box-shaped silencer using the adhesive and the screw nails 5 without the frame 11 at all.
It is also preferable from the viewpoint of construction that the sound absorbing plate 2 is fixed to the reinforcing material 3 and the bolts are screwed into the buried metal fitting 12 so that the mounting bracket 13 is sandwiched between the sound absorbing plate 2 and the sound absorbing plate 2. The box-shaped silencer 1 having a length in the longitudinal direction exceeding 1500 mm is preferable to use the rectangular frame 11 at both ends as shown in FIG.
【００１９】[0019]
【実施例】以下、本発明を実施例に基づいてより具体的
に説明する。本実施例の吸音板２を構成する多孔質コン
クリート材は、次のようにして製造した。原料スラリー
は、ケイ酸質原料として珪石粉末４８重量部、石灰質原
料として早強セメント４８重量部、硬化制御材として二
水石膏４重量部、および前記固形分に対する発泡材とし
てアルミニウム金属粉末０．１２重量部、そして水７８
重量部を基本配合して、さらに界面活性剤として高級ア
ルコール硫酸エステルおよび粘度調節剤としてメチルセ
ルロースを混合した。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below more specifically based on embodiments. The porous concrete material constituting the sound absorbing plate 2 of the present example was manufactured as follows. The raw material slurry was composed of 48 parts by weight of silica powder as a siliceous raw material, 48 parts by weight of early strength cement as a calcareous raw material, 4 parts by weight of gypsum dihydrate as a hardening control material, and 0.12 of aluminum metal powder as a foaming material for the solid content. Parts by weight and water 78
Basically, parts by weight were mixed, and a higher alcohol sulfate as a surfactant and methylcellulose as a viscosity modifier were further mixed.
【００２０】そして補強材３として直径３ｍｍの鉄筋を
縦８本、横２９本をのメッシュ状に組んで得られる吸音
板２の厚さ方向の中心になるように配設した型枠体内
に、この原料スラリーを流し込んで発泡させた後、所定
の寸法にピアノ線で切り、最後にオートクレーブ内で１
８０℃の飽和水蒸気雰囲気で約１０時間養生する。この
ようにして得られた多孔質コンクリート材は、気乾状態
で嵩比重０．４０であった。Then, as a reinforcing member 3, a reinforcing member having a diameter of 3 mm and a length of 29 and a width of 29 are arranged in a mesh form and arranged in the form of a sound absorbing plate 2 at the center in the thickness direction. After pouring and foaming the raw material slurry, the raw material slurry is cut into a predetermined size with a piano wire, and finally cut in an autoclave in an autoclave.
Cure for about 10 hours in a saturated steam atmosphere at 80 ° C. The porous concrete material thus obtained had a bulk specific gravity of 0.40 in an air-dried state.
【００２１】このようにして、主にケイ酸カルシウムか
ら成る多孔質コンクリート材（厚さ５０ｍｍ、幅６００
ｍｍ、長さ９００ｍｍ）の吸音板２を得た。なお、この
吸音板２において曲げ強度試験をＪＩＳ Ａ ５４１６
に準じた試験方法で測定した結果、破壊荷重５９２ｋｇ
ｆ／ｍ2、許容荷重２００ｋｇｆ／ｍ2の曲げ耐力が得ら
れた。Thus, the porous concrete material (thickness: 50 mm, width: 600 mm) mainly composed of calcium silicate
mm, length 900 mm). The bending strength test of this sound absorbing plate 2 was performed according to JIS A 5416.
As a result of measurement by a test method according to
The bending strength of f / m 2 and the allowable load of 200 kgf / m 2 were obtained.
【００２２】次に図２に示すように、空気出入口８また
は９を備えた周壁用吸音板２ｂも含めて所定の長さに切
断された６枚の周壁用吸音板２ｂを、アクリルエマルジ
ョン系接着材で角を張り合わせるとともにスクリュウ釘
５により固定して全体を箱状（縦６００ｍｍ、横６００
ｍｍ、長さ１０００ｍｍ）に組み立てる。この時、隔壁
用吸音板２ａ（厚さ５０ｍｍ、幅３００ｍｍ、高さ５０
０ｍｍ）は箱を閉じる前に内部中央位置にＬ型鋼４及び
スクリュウ釘５、接着材を用いて図１のように固定して
おく。Next, as shown in FIG. 2, six peripheral wall sound absorbing plates 2b cut to a predetermined length including the peripheral sound absorbing plate 2b having the air inlet / outlet 8 or 9 are bonded to an acrylic emulsion adhesive. The whole is box-shaped (600 mm long, 600 mm wide) with the corners glued together and fixed with screw nails 5.
mm, length 1000 mm). At this time, the sound absorbing plate 2a for the partition (thickness 50 mm, width 300 mm, height 50
(0 mm) is fixed at the center of the inside using an L-shaped steel 4, a screw nail 5, and an adhesive before the box is closed as shown in FIG.
【００２３】さらに天井に吊り下げるための吊り下げ用
金具６とダクト１０を箱形消音装置１に取り付ける。以
上の工程に示すように、吸音板２を箱形に組み付けるだ
けで箱形消音装置１が完成して、施工性は非常に良かっ
た。Further, a hanging bracket 6 and a duct 10 for hanging from the ceiling are attached to the box type silencer 1. As shown in the above steps, the box-shaped silencer 1 was completed only by assembling the sound absorbing plate 2 in a box shape, and the workability was very good.
【００２４】本発明の箱形消音装置１を気温１５℃、湿
度８２％、残響室容積５１．２ｍ3において、ＪＩＳ
Ａ １４１６に準じて低周波域（１２５Ｈｚ）から高周
波域（４ｋＨｚ）にかけての音の透過損失を測定したと
ころ、高周波域では３０ｄｂ以上、低周波域でも２０ｄ
ｂ以上とグラスウールを用いた従来の箱形消音装置２０
と同等の性能が得られた。また、鋼板２３及びグラスウ
ールの吸音材２２から成る従来の箱形消音装置２０は７
０ｋｇ、鋼板と従来の多孔質コンクリート材の吸音板か
ら成る箱形消音装置は９０ｋｇであるのに比べて、本発
明の箱形消音装置１は５６ｋｇとなり２０％以上の軽量
化が図られた。The box-shaped silencer 1 of the present invention was subjected to JIS at a temperature of 15 ° C., a humidity of 82%, and a reverberation room volume of 51.2 m 3 .
When the transmission loss of sound from a low frequency range (125 Hz) to a high frequency range (4 kHz) was measured in accordance with A1416, the transmission loss was 30 db or more in the high frequency range and 20 d in the low frequency range.
b and conventional glass silencer 20 using glass wool
The same performance as was obtained. A conventional box-shaped silencer 20 made of a steel plate 23 and a glass wool sound absorbing material 22 is
The box-type silencer 1 according to the present invention has a weight of 90 kg, compared to 90 kg for a box-type silencer composed of 0 kg, a steel plate and a conventional sound-absorbing plate made of a porous concrete material.
【００２５】[0025]
【発明の効果】本発明によれば、箱形消音装置におい
て、その吸音板として内部に補強鉄筋などの補強材が埋
設されている多孔質コンクリート材から成る吸音板が適
用されているため、次のような種々の効果を奏するよう
になる。すなわち、 （１）従来用いられていた吸音板の補強用鋼板が不要に
なるとともに、吸音板の大型化が可能であるため、小型
の複数枚の吸音板を補強用鋼板に張り付けるという作業
がなくなり、従って施工効率が著しく向上し、また補強
用鋼板の取扱いも不要になる。 （２）さらに、周壁用吸音板の補強用鋼板を省略するこ
とにより、屋内の吸音効果が向上するとともに、その面
の結露の発生も無くなる。 （３）厚くて幅広い補強用鋼板が無くなることにより、
箱形消音装置全体の軽量化が図れる。 （４）施工効率向上や補強用鋼板および枠部材等の省略
により、コストも安価になる。 さらに（３）、（４）については、箱形消音装置が大型
になれば、より一層その効果を発揮する。According to the present invention, in the box-shaped silencer, a sound absorbing plate made of a porous concrete material in which a reinforcing material such as a reinforcing steel bar is embedded as the sound absorbing plate is applied. Various effects such as are achieved. That is, (1) The steel plate for reinforcing the sound absorbing plate, which has been conventionally used, becomes unnecessary, and the sound absorbing plate can be enlarged. Therefore, the work of attaching a plurality of small sound absorbing plates to the reinforcing steel plate has been performed. Therefore, the construction efficiency is remarkably improved, and the handling of the reinforcing steel plate is not required. (2) Furthermore, by omitting the reinforcing steel plate of the sound absorbing plate for the peripheral wall, the indoor sound absorbing effect is improved, and dew condensation on the surface is also eliminated. (3) By eliminating thick and wide steel plates for reinforcement,
The overall weight of the box type silencer can be reduced. (4) Cost can be reduced by improving construction efficiency and omitting reinforcing steel plates and frame members. Regarding (3) and (4), if the box-shaped silencer becomes large, the effect is further exhibited.
【図１】本発明における箱形消音装置の一実施例の一部
断面斜視図。FIG. 1 is a partially sectional perspective view of one embodiment of a box-shaped silencer according to the present invention.
【図２】図１における箱形消音装置の一部断面分解斜視
図。FIG. 2 is an exploded perspective view, partially in section, of the box-shaped silencer in FIG.
【図３】（イ）本発明に係わる表面に凹凸模様のある吸
音板の断面図。（ロ）本発明に係わる表面に凹凸模様の
ある吸音板の正面図。FIG. 3A is a cross-sectional view of a sound absorbing plate according to the present invention, which has an uneven pattern on its surface. (B) A front view of a sound absorbing plate according to the present invention having an uneven pattern on its surface.
【図４】従来のグラスウールを使用した箱形消音装置の
一部断面斜視図。FIG. 4 is a partial cross-sectional perspective view of a conventional box-shaped silencer using glass wool.
１ 箱形消音装置 ２ 多孔質コンクリート材から成る吸音板 ２ａ 隔壁用吸音板 ２ｂ 周壁用吸音板 ３ 補強材 ４ Ｌ型鋼材 ５ スクリュウ釘 ６ 吊り下げ用金具 ７ ロープ ８ 屋外側の空気出入口 ９ 屋内側の空気出入口 １０ ダクト １１ 枠体 １２ 埋設金具 １３ 取付金具 DESCRIPTION OF SYMBOLS 1 Box-shaped silencer 2 Sound absorbing plate made of porous concrete material 2a Sound absorbing plate for partition wall 2b Sound absorbing plate for peripheral wall 3 Reinforcement material 4 L-shaped steel material 5 Screw nail 6 Hanging bracket 7 Rope 8 Outdoor air inlet / outlet 9 Indoor side Air inlet and outlet 10 duct 11 frame 12 buried metal fittings 13 mounting metal fittings
Claims (5)
もに内部に蛇行した空気流通路を形成させる隔壁が配設
されており、屋外騒音の消音機能と換気機能とを併せも
つ箱型消音装置において、該箱型消音装置の少なくとも
隔壁及び周壁は補強材が埋設された多孔質コンクリート
材より成る吸音板であることを特徴とする箱型消音装
置。1. A box type silencer having outdoor and indoor air inlets and outlets, and a partition for forming a meandering air flow passage therein, and having both an outdoor noise silencing function and a ventilation function. , Wherein at least a partition wall and a peripheral wall of the box-shaped silencer are sound absorbing plates made of a porous concrete material in which a reinforcing material is embedded.
〜０．５であることを特徴とする請求項１記載の箱型消
音装置。2. The sound-absorbing plate has an air-dried bulk specific gravity of 0.25.
2. The box-type silencer according to claim 1, wherein the number is from 0.5 to 0.5.
る請求項１または２記載の箱型消音装置。3. The box type silencer according to claim 1, wherein said reinforcing member is a reinforcing bar.
請求項１、２または３記載の箱型消音装置。4. The box-type silencer according to claim 1, wherein the sound absorbing plate is provided with an uneven pattern on a surface thereof.
定された請求項１、２、３または４記載の箱型消音装
置。5. The box type silencer according to claim 1, wherein an embedded metal fitting having a screw portion is fixed to said reinforcing member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9257702A JPH1183145A (en) | 1997-09-04 | 1997-09-04 | Box type muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9257702A JPH1183145A (en) | 1997-09-04 | 1997-09-04 | Box type muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1183145A true JPH1183145A (en) | 1999-03-26 |
Family
ID=17309934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9257702A Pending JPH1183145A (en) | 1997-09-04 | 1997-09-04 | Box type muffler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1183145A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009008677A (en) * | 2007-06-27 | 2009-01-15 | Asml Holding Nv | Improvement of pressure sensitivity of gas gauge using surface roughness of nozzle surface |
-
1997
- 1997-09-04 JP JP9257702A patent/JPH1183145A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009008677A (en) * | 2007-06-27 | 2009-01-15 | Asml Holding Nv | Improvement of pressure sensitivity of gas gauge using surface roughness of nozzle surface |
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