JPH10299120A - Suspending sound absorbing plate - Google Patents
Suspending sound absorbing plateInfo
- Publication number
- JPH10299120A JPH10299120A JP12176097A JP12176097A JPH10299120A JP H10299120 A JPH10299120 A JP H10299120A JP 12176097 A JP12176097 A JP 12176097A JP 12176097 A JP12176097 A JP 12176097A JP H10299120 A JPH10299120 A JP H10299120A
- Authority
- JP
- Japan
- Prior art keywords
- sound absorbing
- absorbing plate
- sound
- hanging
- frame
- 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
- 239000000463 material Substances 0.000 claims abstract description 34
- 230000005484 gravity Effects 0.000 claims abstract description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 239000000725 suspension Substances 0.000 claims description 10
- 208000029152 Small face Diseases 0.000 claims description 5
- 230000001788 irregular Effects 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 11
- 239000002184 metal Substances 0.000 abstract description 11
- 239000011358 absorbing material Substances 0.000 abstract description 8
- 239000012779 reinforcing material Substances 0.000 abstract description 8
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- 238000010521 absorption reaction Methods 0.000 description 7
- 230000001965 increasing effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000006260 foam Substances 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 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
- 238000013461 design Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000010926 purge Methods 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
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010922 glass waste Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 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
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [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
- 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
Landscapes
- Building Environments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、吊り下げ用吸音板
に関するものであり、特に建屋天井、架台、フレーム鋼
材等から吊り下げるための吊り下げ用吸音板に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hanging sound absorbing plate, and more particularly to a hanging sound absorbing plate for hanging from a building ceiling, a gantry, frame steel or the like.
【０００２】[0002]
【従来の技術】工場、事務所あるいは騒音の激しい場所
において、従来より吸音及び防音対策として吊り下げ用
吸音板が用いられていることがあり、その一例としてグ
ラスウールあるいはロックウールから成る吸音装置が天
井等より吊り下げられていた。この吸音装置としては、
例えば特開昭４９−３２４１９号公報に記載されている
ような繊維質内部に補強用線状体を埋設した吸音材を用
いたものが知られていた。2. Description of the Related Art In a factory, an office, or a place with a lot of noise, a sound absorbing plate for hanging is conventionally used as a sound absorbing and soundproofing measure. For example, a sound absorbing device made of glass wool or rock wool is used as a ceiling. And so on. As this sound absorbing device,
For example, one using a sound absorbing material in which a reinforcing linear body is embedded in a fibrous material as described in Japanese Patent Application Laid-Open No. 49-32419 has been known.
【０００３】しかし、これら繊維質の吸音材は、長い間
使っているとその自重および吸湿、ゴミ付着あるいは室
内の振動等により繊維質に隙間ができ吸音性能が低下す
るといった問題点が発生していた。However, when these fibrous sound absorbing materials are used for a long time, there is a problem that a gap is formed in the fibrous material due to its own weight and moisture absorption, adhesion of dust, or vibration in a room, and the sound absorbing performance is reduced. Was.
【０００４】また、繊維質内部にゴミが目詰まりして吸
音性能が悪くなった場合、エアパージによる清掃が必要
になるが、その部材の針状の微粉が飛散して人体に有害
となるため、通常は吸音材全部の取り換えがなされてお
り経済的に不利であった。さらに表面を被覆した布ある
いは金網を外して取り換える必要があり非常に手間がか
かっていた。Further, when dust is clogged inside the fiber and the sound absorbing performance is deteriorated, cleaning by air purge is necessary. However, needle-like fine powder of the member is scattered and harmful to the human body. Normally, the entire sound absorbing material was replaced, which was economically disadvantageous. Furthermore, it is necessary to remove the cloth or wire mesh covering the surface and replace it, which is very troublesome.
【０００５】そこで、表面の被覆や補強用線状体が必要
なく構造が簡単であり、また目詰まりしてもエアーパー
ジにより容易に吸音性能を復活させることができ、さら
に繊維質の吸音材と体積当たりの吸音性能がほとんど差
異のない多孔質コンクリート材による吊り下げ用吸音板
が要求されてきた。[0005] Therefore, the structure is simple because there is no need for covering the surface or a reinforcing linear body, and even if clogging occurs, the sound absorbing performance can be easily restored by air purging. There has been a demand for a hanging sound absorbing plate made of a porous concrete material having almost no difference in sound absorbing performance per volume.
【０００６】この多孔質コンクリート材を用いて吊り下
げ用吸音板を製造するためには、多孔質コンクリート材
に吊り下げ用部材を埋め込むことが望ましいが、多孔質
コンクリート材はそれ自体非常に脆い（圧縮強度：１５
〜２０Ｋｇｆ／ｃｍ2）ため、埋め込まれた吊り下げ用
部材はその吸音板自身の重量さえも吊り下げることがで
きずに抜けたり破損してしまう。In order to manufacture a sound absorbing plate for suspension using this porous concrete material, it is desirable to embed the suspension member in the porous concrete material, but the porous concrete material itself is very brittle ( Compressive strength: 15
-20 kgf / cm 2 ), the embedded hanging member cannot be suspended even by the weight of the sound absorbing plate itself and comes off or is damaged.
【０００７】そのため図７（イ）及び（ロ）に示すよう
に、係止金具１３を固着させたＬ型鋼等から成る枠体１
１を多孔質コンクリート材１２の小口面に組み付けて、
それを天井等から吊していた。しかし、その組み付けら
れた枠体１１は、それ自身音を反射するとともに多孔質
コンクリート材１２の４つの小口面及びその付近を覆い
隠してしまい、多孔質コンクリート材１２から成る吸音
材の表面積が減少して全体としての吸音性能を低下させ
る原因となっていた。[0007] Therefore, as shown in FIGS. 7A and 7B, the frame 1 made of L-shaped steel or the like to which the locking fitting 13 is fixed.
1 is attached to the small face of the porous concrete material 12,
It was hung from the ceiling etc. However, the assembled frame 11 reflects the sound itself and covers and covers the four small faces of the porous concrete material 12 and the vicinity thereof, so that the surface area of the sound absorbing material made of the porous concrete material 12 is reduced. As a result, the overall sound absorbing performance is reduced.
【０００８】また、吊り下げ強度上の理由から枠体１１
は金属製の鋼板で構成されることが多い。そのため枠体
付き吊り下げ用吸音板１０自体が重くなり、吸音板の大
型化を困難にし、またそれを吊り下げるためにはかなり
頑強な天井、架台あるいはフレーム鋼材等が予め施工さ
れていなければならないという問題点があった。従っ
て、多段にした枠体付き吊り下げ用吸音板１０あるいは
大型の枠体付き吊り下げ用吸音板１０を吊り下げること
は、いっそう重量が大きくなりかなり困難であった。[0008] Also, the frame 11 may be used for reasons of suspension strength.
Is often made of a metal steel plate. Therefore, the hanging sound absorbing plate with frame 10 itself becomes heavy, making it difficult to increase the size of the sound absorbing plate, and in order to suspend the sound absorbing plate, a rather robust ceiling, gantry or frame steel material must be installed in advance. There was a problem. Therefore, it is considerably difficult to suspend the hanging sound absorbing plate 10 with a frame or the large-sized hanging sound absorbing plate 10 with a frame.
【０００９】さらに多孔質コンクリート材１２は吸水性
が高いため湿度が高い場所では、図７（ロ）のようにＬ
型鋼枠体１１が組み付けられた枠体付き吊り下げ用吸音
板１０は、吸湿によって多孔質コンクリート材１２側
（図において右側）が重くなり、枠体が付いてバランス
がとれていた小口面厚さ方向において重心が移動して枠
体付き吊り下げ用吸音板１０が傾いたりしていた。これ
は枠体付き吊り下げ用吸音板１０を多段に吊り下げた場
合さらに枠体付き吊り下げ用吸音板１０が動揺し易いと
いう問題もあった。また、枠体１１を多孔質コンクリー
ト材１２に組み付けることは非常に手間がかかり、その
取付作業面及び材料面からもコストがかかるとともに外
観も悪かった。Further, since the porous concrete material 12 has a high water absorption, in a place where the humidity is high, as shown in FIG.
The hanging sound-absorbing plate 10 with a frame to which the steel frame 11 is attached becomes heavy on the side of the porous concrete material 12 (right side in the figure) due to moisture absorption, and the thickness of the small opening is balanced with the frame. The center of gravity moved in the direction, and the hanging sound absorbing plate 10 with the frame body was inclined. This has a problem that when the hanging sound absorbing plate with frame 10 is hung in multiple stages, the hanging sound absorbing plate 10 with frame is easily shaken. In addition, assembling the frame body 11 to the porous concrete material 12 was very troublesome, and was expensive in terms of mounting work and material, and had a poor appearance.
【００１０】そこで、本発明の課題は上記の問題点をな
くし、十分な吊り下げ強度を備えるとともに枠体を必要
としない多孔質コンクリート材から成る軽量な吊り下げ
用吸音板を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a lightweight suspension sound absorbing plate made of a porous concrete material which has sufficient suspension strength and does not require a frame, eliminating the above-mentioned problems. .
【００１１】[0011]
【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、多孔質コンクリート材から成る吸音板の
内部に補強材が埋設されているとともに、その吸音板の
少なくとも一カ所に前記補強材と連結している吊り下げ
用部材が設けられている吊り下げ用吸音板（以下、単に
吸音板という。）の構成とした。According to the present invention, in order to solve the above-mentioned problems, a reinforcing material is buried inside a sound absorbing plate made of a porous concrete material, and the sound absorbing plate is provided in at least one place of the sound absorbing plate. A suspension sound absorbing plate (hereinafter, simply referred to as a sound absorbing plate) provided with a suspending member connected to the reinforcing member.
【００１２】次に本発明の作用を説明する。本発明で
は、多孔質コンクリート材から成る吸音板の内部に補強
材が埋設されて、さらに吊り下げ用部材が補強材に連結
されていることにより、吸音板の周囲に従来のような枠
体を組み付けなくても十分な吊り下げ強度を備えること
ができるようになった。Next, the operation of the present invention will be described. In the present invention, a reinforcing member is embedded inside a sound absorbing plate made of a porous concrete material, and a hanging member is connected to the reinforcing material. A sufficient hanging strength can be provided without assembling.
【００１３】すなわち表面を覆い隠す枠体がなくなった
ことにより吸音板のすべての表面において吸音可能とな
り、吸音面積が増加して吸音性能を向上させることにな
った。また吸音板の自重により吊り下げ用部材が抜け落
ちることがなくなり、枠体なしでも吸音板を多段に渡っ
て吊り下げることが可能になった。In other words, the elimination of the frame that covers the surface makes it possible to absorb sound on all surfaces of the sound absorbing plate, thereby increasing the sound absorbing area and improving the sound absorbing performance. Further, the hanging member does not drop off due to the weight of the sound absorbing plate, and the sound absorbing plate can be hung in multiple stages without a frame.
【００１４】さらに、重量が軽くなって枠体なしでも吸
音板を多段にしかも様々な形態に吊り下げたり、あるい
は大型の吸音板を吊り下げたりすることが可能となっ
た。これは天井等のフレーム鋼材等への負担を軽減させ
ることにもなる。また、吸音板を吊り下げる棒状金具ま
たはフック金具等を小さくすることもできた。Further, the weight is reduced and the sound absorbing plate can be hung in multiple stages and in various forms without a frame, or a large sound absorbing plate can be hung. This also reduces the load on the frame steel such as the ceiling. Further, the rod-shaped metal fitting or the hook metal fitting for suspending the sound absorbing plate can be reduced in size.
【００１５】Ｌ型鋼等の枠体がないため、多孔質コンク
リート材が吸湿しても吸音板の小口面厚さ方向の重心は
常に中心に保たれ、多段に吸音板を吊り下げても動揺巾
が小さい。Since there is no frame such as L-shaped steel, even if the porous concrete material absorbs moisture, the center of gravity of the sound-absorbing plate in the thickness direction of the small face is always kept at the center, and even if the sound-absorbing plate is hung in multiple stages, the fluctuation width Is small.
【００１６】[0016]
【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。本発明は、図１に示すように周囲
に枠体が設けられていない多孔質コンクリート材から成
る吸音板１の内部に補強材４が埋設されているととも
に、その吸音板１の少なくとも一カ所に補強材４と連結
している吊り下げ用部材３が設けられている吸音板１で
ある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. According to the present invention, as shown in FIG. 1, a reinforcing material 4 is buried inside a sound absorbing plate 1 made of a porous concrete material having no surrounding frame, and at least one portion of the sound absorbing plate 1 is provided. It is a sound absorbing plate 1 provided with a hanging member 3 connected to a reinforcing member 4.
【００１７】この吸音板１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。ひとつは、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 1 is not particularly limited, but is preferably obtained by the following two methods. One is to mix the raw slurry and the foam by a preform method in which foams formed separately are mixed into a raw slurry mainly composed of siliceous and calcareous materials or a mix foam method in which foams are formed by foaming the raw slurry. Alternatively, a semi-cured body in which open cells are formed is produced by foaming a foaming material such as aluminum metal powder mixed into the raw material slurry. 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.
【００１８】もうひとつは、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、セメントが好まし
い。The other is a porous concrete material obtained by connecting natural or artificial fine aggregates of sub-millimeters to several millimeters with a binder such as cement. Fine aggregates include tiles, ceramic waste, glass waste, expansive shale, and the like, and the binder is preferably water glass or cement.
【００１９】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, it is more preferable that the bulk specific gravity is 0.25 to 0.5 and the open cells have 30% or more. That is, when the open cells have 30% or more, the sound absorbing performance becomes more excellent, and the bulk specific gravity is 0.25 to 0.5.
Those in the range of 5 are lightweight and have sufficient strength as a rigid body, so that they are sufficient.
【００２０】吊り下げ用部材３は吸音板１の少なくとも
一カ所以上に設けられていることが必要である。具体的
には吸音板１のどこに配設されても良いが、短辺あるい
は長辺小口面の各々に２個づつ吊り下げ用部材３を設け
ることが、少数の吊り下げ用部材３によりバランスよく
吸音板１を吊り下げることができて好ましい。It is necessary that the suspension member 3 is provided at at least one location on the sound absorbing plate 1. More specifically, it may be disposed anywhere on the sound absorbing plate 1, but it is preferable to provide two suspending members 3 on each of the short side or the long side small edge surface, so that a small number of the suspending members 3 provide a good balance. This is preferable because the sound absorbing plate 1 can be hung.
【００２１】また、吸音板１の上下の相対する小口面に
それぞれ２個づつ吊り下げ用部材３を設けておくと、少
数の吊り下げ用部材３によりバランスがとれるとともに
吸音板を図４（イ）（ロ）に示すように多段に吊り下げ
ることが可能となり好ましい。さらに図５（イ）（ロ）
及び図６に示すように吸音板１を多角形または箱型を構
成するとともに多段に吊り下げることもできる。なお、
図１に示すように補強材４に固設した吊り下げ用部材３
へフック金具３を予め結合させておいても良いし、フッ
ク金具５を吊り下げ時に結合させても良い。吊り下げ用
部材３は吸音板１の内部に完全に埋設させていても一部
が露出していても良い。また図３に示すように吸音板１
の内部に雌ねじ７ａを設けたパイプ状のアンカー金具７
を完全に埋設させて、吊り下げ時に吸音板１の小口面に
穴をあけて、その雌ねじ７ａにフック金具５等を螺合さ
せるようにしても良い。If two suspending members 3 are provided on the upper and lower opposed small faces of the sound absorbing plate 1, respectively, the balance can be achieved by a small number of the suspending members 3 and the sound absorbing plate can be mounted as shown in FIG. (2) As shown in (b), it is possible to hang in multiple stages, which is preferable. Fig. 5 (a) (b)
As shown in FIG. 6, the sound absorbing plate 1 can be formed in a polygonal or box shape and can be hung in multiple stages. In addition,
As shown in FIG. 1, the suspension member 3 fixed to the reinforcing member 4
The hook fitting 3 may be connected in advance, or the hook fitting 5 may be connected when suspended. The hanging member 3 may be completely embedded in the sound absorbing plate 1 or a part thereof may be exposed. Also, as shown in FIG.
Pipe-shaped anchor fitting 7 having a female screw 7a inside
May be completely buried, a hole may be made in the fore-edge surface of the sound absorbing plate 1 at the time of suspension, and the hook fitting 5 or the like may be screwed into the female screw 7a.
【００２２】補強材４としては、強度上及び製造加工の
し易さから鉄筋が好ましい。また、補強材４に炭素繊維
あるいはアラミド繊維の集束物を用いると吸音板１がよ
り軽量となり好ましい。また、補強材４は図１のように
カゴ状にして吸音板１内部に埋設させることが強度アッ
プの点で好ましいが、マット状（図示せず）としても良
い。The reinforcing member 4 is preferably a reinforcing bar from the viewpoint of strength and ease of processing. Also, it is preferable to use a bundle of carbon fibers or aramid fibers for the reinforcing member 4 because the sound absorbing plate 1 becomes lighter. The reinforcing member 4 is preferably formed in a cage shape as shown in FIG. 1 and embedded in the sound absorbing plate 1 from the viewpoint of increasing the strength, but may be formed in a mat shape (not shown).
【００２３】また本発明１の吸音板１表面に図２に示す
ような直線あるいは曲線的な凹凸模様を設けることが、
意匠性を高めるとともに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。The surface of the sound absorbing plate 1 of the present invention 1 may be provided with a linear or curved uneven pattern as shown in FIG.
This is preferable because the design is enhanced and the sound absorbing area is further increased, so that higher sound absorbing performance can be obtained.
【００２４】[0024]
【実施例１】以下、本発明を実施例に基づいてより具体
的に説明する。完成したときに１枚あたりの吸音板１が
厚さ１５ｃｍ×巾６０ｃｍ×長さ１９７ｃｍになるよう
に、長辺小口面の補強材４に２個の吊り下げ用部材３を
連結させるとともにその補強材４をカゴ状に組み立て
る。なお、補強材４は直径５ｍｍの鉄筋を図１のように
吸音板１に埋設し、長手方向に８本通したカゴ状とし
た。吸音板１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。[Embodiment 1] Hereinafter, the present invention will be described more specifically based on embodiments. At the time of completion, two hanging members 3 are connected to the reinforcing material 4 on the small side of the long side so that each sound absorbing plate 1 becomes 15 cm in thickness × 60 cm in width × 197 cm in length and is reinforced. Assemble the material 4 in a cage shape. The reinforcing member 4 was formed in a cage shape in which a reinforcing bar having a diameter of 5 mm was embedded in the sound absorbing plate 1 as shown in FIG. The porous concrete material constituting the sound absorbing plate 1 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 78 parts by weight of water were blended, and a higher alcohol sulfate as a surfactant and methylcellulose as a viscosity modifier were further mixed.
【００２５】そして前記カゴ状補強材４が配設された型
枠内に、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１８０℃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、ＪＩ
ＳＡ ５４１６に準じた絶乾状態で嵩比重０．４０であ
った。Then, after the raw material slurry is poured into a mold in which the cage-shaped reinforcing member 4 is provided and foamed,
The sheet is cut to a predetermined size with a piano wire, and finally cured in a saturated steam atmosphere at 180 ° C. for about 10 hours in an autoclave.
The porous concrete material thus obtained is made by JI
Bulk specific gravity was 0.40 in an absolutely dry state according to SA 5416.
【００２６】また、本実施例は吸音板１内に埋設された
雌ねじにより構成される吊り下げ用部材３に雄ねじ付き
の図１に示すフック金具５あるいは図２に示す棒状金具
２を螺合させて吸音板１を天井等から吊り下げ可能とし
た。なお、図１に示す雌ねじにより構成される吊り下げ
用部材３はフック金具５等の雄ねじとの螺合構造とした
が、嵌合あるいは係止による方法から成る吊り下げ用部
材３を用いても良い。さらに吸音板１の下端に上端同様
の雌ねじより構成される吊り下げ用部材３を埋設して、
これに外部よりフック金具５あるいはリング金具（図示
せず）を連結させることにより吸音板１を多段に吊り下
げることが可能となる。In this embodiment, a hook member 5 shown in FIG. 1 or a rod-shaped metal member 2 shown in FIG. 2 having a male screw is screwed to a hanging member 3 constituted by a female screw embedded in the sound absorbing plate 1. Thus, the sound absorbing plate 1 can be hung from a ceiling or the like. Although the hanging member 3 composed of a female screw shown in FIG. 1 has a screwing structure with a male screw such as a hook fitting 5, the hanging member 3 formed by fitting or locking may be used. good. Further, a hanging member 3 composed of a female screw similar to the upper end is embedded at the lower end of the sound absorbing plate 1,
By connecting a hook fitting 5 or a ring fitting (not shown) from the outside to this, the sound absorbing plate 1 can be hung in multiple stages.
【００２７】なお、この吸音板１には、１枚当たり３Ｋ
ｇの鉄筋が使用された。この吸音板１の表面積及び重量
を表１に、吸音性能を表２に示す。吸音性能試験は、試
験室（室容積：５１３ｍ3）の中に、厚さ１５ｃｍ×巾
６０ｃｍ×長さ１９７ｃｍの吸音板１０枚を残響室の一
対角線上に２０ｃｍの間隔をあけて直線的に吊り下げ
て、ＪＩＳ Ａ １４０９に準じた測定方法により残響
時間を測定した。The sound absorbing plate 1 has 3K per sheet.
g of rebar was used. Table 1 shows the surface area and weight of the sound absorbing plate 1, and Table 2 shows the sound absorbing performance. In the sound absorption performance test, 10 sound absorbing plates having a thickness of 15 cm x a width of 60 cm x a length of 197 cm were placed in a test room (room volume: 513 m 3 ) in a straight line with a spacing of 20 cm on a diagonal line of the reverberation room. After being suspended, the reverberation time was measured by a measuring method according to JIS A1409.
【００２８】[0028]
【比較例１】次に実施例１と同様に製造された同じ寸法
の鉄筋入りの枠体なし状態の多孔質コンクリート材から
成る吸音板１に、図７に示ようなＬ型鋼の枠体１１を組
み付けて、枠体付き吊り下げ用吸音板１０を得た。Ｌ型
鋼は６５ｍｍ巾、厚み６ｍｍの等辺山形鋼を使用した。
この比較例１の試験結果を表１及び表２に示す。試験方
法は実施例１と同じとした。COMPARATIVE EXAMPLE 1 Next, an L-shaped steel frame 11 as shown in FIG. To obtain a hanging sound absorbing plate 10 with a frame. As the L-shaped steel, an equilateral angle steel having a width of 65 mm and a thickness of 6 mm was used.
The test results of Comparative Example 1 are shown in Tables 1 and 2. The test method was the same as in Example 1.
【００２９】[0029]
【表１】 [Table 1]
【００３０】[0030]
【表２】 [Table 2]
【００３１】これらの実施例１及び比較例１の結果から
わかることは、表１に示すように、本発明の吸音板１は
枠体付き吊り下げ用吸音板１０に比べて吸音に有効な表
面積が約３３％増加している。これにより表２に示すよ
うに、枠体付き吊り下げ用吸音板１０に比べて実施例１
の吸音板１では各周波数の音に対する残響時間は明らか
に減少している。As can be seen from the results of Example 1 and Comparative Example 1, as shown in Table 1, the sound absorbing plate 1 of the present invention has a more effective surface area for sound absorption than the hanging sound absorbing plate 10 with a frame. Increased by about 33%. As a result, as shown in Table 2, compared with the hanging sound absorbing plate 10 with the frame, the first embodiment
In the sound absorbing plate 1, the reverberation time for the sound of each frequency is clearly reduced.
【００３２】また枠体付き吊り下げ用吸音板１０に比べ
て実施例１の枠体なしの吸音板１は、総重量が約６５％
になった。このことは、例えば４枚の枠体なしの吸音板
１を吊り下げた場合、天井のフレーム鋼材６にかかる重
量を１５６Ｋｇも軽減させることができる。なお、さら
にこの効果は、枠体なしの吸音板１を図４（イ）
（ロ）、図５（ロ）及び図６に示すように多段に吊り下
げた場合、天井にかかる負担を軽減させ、また段数をよ
り多くできて、いっそう有利に働くことになる。また小
さな棒状金具２またはフック金具５により吸音板１を吊
り下げることができる。The total weight of the sound-absorbing plate 1 without the frame of the first embodiment is about 65% of that of the hanging sound-absorbing plate 10 with the frame.
Became. This means that, for example, when four sound absorbing plates 1 without a frame are suspended, the weight applied to the frame steel 6 on the ceiling can be reduced by 156 kg. In addition, this effect is further improved by using the sound absorbing plate 1 without a frame as shown in FIG.
(B), when hung in multiple stages as shown in FIG. 5 (b) and FIG. 6, the load on the ceiling can be reduced, and the number of stages can be increased, which works more advantageously. Further, the sound absorbing plate 1 can be hung by the small rod-shaped metal fitting 2 or the hook metal fitting 5.
【００３３】[0033]
【実施例２】実施例２では、実施例１で製造した枠なし
の吸音板１の表面に、図２のように縦溝８（凹凸模様）
を切削して設けた溝付きの枠体なしの吸音板９を用い
る。ここで山部ａ：４０ｍｍ、谷部ｂ：３０ｍｍ、傾斜
部ｃ：１５ｍｍ、深さｄ：３０ｍｍとした。また、この
実施例２の表面積及び吸音性能表等とを比較するため実
施例１で製造した吸音板１を用いる。表３に示すよう
に、この溝付きの吸音板９は、表面に模様のない枠なし
の吸音板１に比べて表面積を約４５％増加させ、かつ重
量を約２０％減少させることができた。Second Embodiment In a second embodiment, as shown in FIG. 2, a vertical groove 8 (an uneven pattern) is formed on the surface of the sound absorbing plate 1 without a frame manufactured in the first embodiment.
Is used. The sound absorbing plate 9 without a framed body provided with a groove is used. Here, the peak part a: 40 mm, the valley part b: 30 mm, the inclined part c: 15 mm, and the depth d: 30 mm. The sound absorbing plate 1 manufactured in Example 1 is used to compare the surface area, the sound absorbing performance table, and the like of Example 2 with each other. As shown in Table 3, the grooved sound absorbing plate 9 was able to increase the surface area by about 45% and reduce the weight by about 20% as compared with the sound absorbing plate 1 having no frame on the surface. .
【００３４】さらに吸音性能試験を、試験室（室容積：
５１３ｍ3）の中に、厚さ１５ｃｍ×巾６０ｃｍ×長さ
１９７ｃｍの溝付きの吸音板９を１０枚残響室の一対角
線上に２０ｃｍの間隔をあけて直線的に吊り下げて、Ｊ
ＩＳ Ａ １４０９に準じた測定方法により残響時間を
測定した。この試験結果を表４に示す。なお、本実施例
２の１枚当たりの吸音力は以下の計算式により算出し
た。 吸音力 ＝ ５５．３＊Ｖ＊（１／Ｔ１−１／Ｔ２）／
（ｃ＊Ｎ） Ｖ ：残響室容量（ｍ3) Ｔ１：試料を入れた状態における残響時間（ｓ） Ｔ２：試料を入れない状態における残響時間（ｓ） ｃ ：空気中の音速（ｍ／ｓ） ｃ＝３３１．５＋０．
６ｔ Ｎ ：試料の枚数Further, a sound absorption performance test was conducted in a test room (room volume:
513 m 3 ), ten sound-absorbing plates 9 with a groove having a thickness of 15 cm × a width of 60 cm × a length of 197 cm are linearly suspended on a diagonal line of the reverberation room at intervals of 20 cm,
The reverberation time was measured by a measuring method according to IS A1409. Table 4 shows the test results. The sound absorbing power per sheet of Example 2 was calculated by the following formula. Sound absorption = 55.3 * V * (1 / T1-1 / T2) /
(C * N) V: reverberation chamber capacity (m 3 ) T1: reverberation time with sample inserted (s) T2: reverberation time without sample inserted (s) c: sound velocity in air (m / s) ) C = 331.5 + 0.
6t N: number of samples
【００３５】[0035]
【表３】 [Table 3]
【００３６】[0036]
【表４】 [Table 4]
【００３７】この試験結果より、この溝付きの吸音板９
は中心周波数が５００Ｈｚ以上において明らかに残響時
間を減少させるとともに吸音力を向上させることが確認
された。１２５Ｈｚの低音域においての吸音性能は、吸
音材の厚みに起因するところが大きいため、溝付きにし
た厚さ１５ｃｍの吸音板１では、模様なしのものに比べ
て不利になっている。From the test results, it can be seen that the grooved sound absorbing plate 9
It was confirmed that when the center frequency was 500 Hz or more, the reverberation time was clearly reduced and the sound absorbing power was improved. Since the sound absorbing performance in the low frequency range of 125 Hz largely depends on the thickness of the sound absorbing material, the grooved sound absorbing plate 1 having a thickness of 15 cm is disadvantageous compared to the sound absorbing plate 1 having no pattern.
【００３８】しかし、溝付きの吸音板９は中音域以上に
おいては優れた吸音効果を発揮した。このことは、この
溝付き吸音板９の厚みを１５ｃｍよりさらに増すことに
より、低音域においてもいっそう吸音性能の優れた吸音
材を得ることができることもわかる。以上、本実施例２
から明らかなように、本発明の溝付きの枠体なし吊り下
げ吸音板９は、表面積の増加とともに吸音性能がさらに
向上する。However, the grooved sound absorbing plate 9 exhibited an excellent sound absorbing effect above the middle sound range. This means that by further increasing the thickness of the grooved sound absorbing plate 9 from 15 cm, it is possible to obtain a sound absorbing material having better sound absorbing performance even in a low sound range. As described above, the second embodiment
As is clear from the above, the grooved frameless hanging sound absorbing plate 9 of the present invention further improves the sound absorbing performance as the surface area increases.
【００３９】[0039]
【発明の効果】本発明によれば、多孔質コンクリート材
の枠体をなくして吊り下げ用吸音板の全表面から吸音で
きるようになるため吸音性能を著しく向上させることが
可能となった。また重量のある枠体がなくなったことに
より、その吸音板の制作も容易になり、しかも断面積の
小さなフレーム鋼材を用いて吊り下げ用吸音板を天井等
から吊すことができ、安い価格での防音工事を可能とし
た。さらに同じフレーム鋼材に対して多段あるいは大型
の吸音材を吊すことができるため限られた狭い建物内に
おいても吸音性能を高くする効果が発揮できる。枠体の
ない吊り下げ用吸音板は、表面の切削により凹凸模様を
付けると吸音面積が増加してさらに吸音性能を向上さ
せ、また外観デザインの良い吊り下げ用吸音板を得るこ
ともできる。According to the present invention, it becomes possible to eliminate the frame of the porous concrete material and to absorb sound from the entire surface of the hanging sound absorbing plate, so that the sound absorbing performance can be significantly improved. In addition, the elimination of the heavy frame facilitates the production of the sound-absorbing plate, and the hanging sound-absorbing plate can be hung from a ceiling or the like using frame steel with a small cross-sectional area. Soundproofing work was made possible. Furthermore, since a multi-stage or large-sized sound absorbing material can be suspended from the same frame steel material, the effect of enhancing the sound absorbing performance can be exhibited even in a limited narrow building. A hanging sound absorbing plate without a frame increases the sound absorbing area by providing a concavo-convex pattern by cutting the surface, further improving the sound absorbing performance, and can also obtain a hanging sound absorbing plate with a good external design.
【図１】本発明の吊り下げ用吸音板の例を示す一部断面
図。FIG. 1 is a partial cross-sectional view showing an example of a hanging sound absorbing plate of the present invention.
【図２】（イ）本発明の他の実施例を示す上面図。 （ロ）本発明の他の実施例を示す正面図。FIG. 2A is a top view showing another embodiment of the present invention. (B) Front view showing another embodiment of the present invention.
【図３】本発明の他の実施例を示す斜視図。FIG. 3 is a perspective view showing another embodiment of the present invention.
【図４】（イ）本発明の吊り下げ用吸音板を縦に多段に
吊り下げた説明図。 （ロ）本発明の吊り下げ用吸音板を横に多段に吊り下げ
た説明図。FIG. 4A is an explanatory view in which the hanging sound absorbing plate of the present invention is vertically suspended in multiple stages. (B) Explanatory drawing in which the hanging sound-absorbing plate of the present invention is suspended in multiple stages horizontally.
【図５】（イ）本発明の吊り下げ吸音板で多角形を構成
した斜視図。 （ロ）本発明の吊り下げ吸音板で多角形を構成し多段に
した斜視図。FIG. 5 (a) is a perspective view of a hanging sound absorbing plate of the present invention which forms a polygon. (B) A perspective view in which a hanging sound absorbing plate of the present invention is formed in a polygonal shape and has multiple stages.
【図６】本発明の吊り下げ用吸音板により箱型を構成し
た斜視図。FIG. 6 is a perspective view of a box-shaped sound absorbing plate according to the present invention.
【図７】（イ）従来の枠体付き吊り下げ用吸音板の正面
図。 （ロ）従来の枠体付き吊り下げ用吸音板の断面図。FIG. 7 (a) is a front view of a conventional hanging sound absorbing plate with a frame. (B) A cross-sectional view of a conventional hanging sound absorbing plate with a frame.
１ 吊り下げ用吸音板 ２ 棒状金具 ３ 吊り下げ用部材 ４ 補強材 ５ フック金具 ６ フレーム鋼材 ７ パイプ状のアンカー金具 ７ａ雌ねじ ８ 縦溝 ９ 溝付きの枠体なし吊り下げ用吸音板 ａ 山部 ｂ 谷部 ｃ 傾斜部 ｄ 深さ DESCRIPTION OF SYMBOLS 1 Hanging sound-absorbing plate 2 Rod-shaped metal fitting 3 Hanging member 4 Reinforcement 5 Hook metal 6 Frame steel material 7 Pipe-shaped anchor metal 7a female screw 8 Vertical groove 9 Groove-shaped frame-less hanging sound-absorbing plate a Mountain b Valley c Inclined d Depth
Claims (5)
部に補強材が埋設されているとともに、その吸音板の少
なくとも一カ所に前記補強材と連結している吊り下げ用
部材が設けられていることを特徴とする吊り下げ用吸音
板。1. A sound-absorbing plate made of a porous concrete material, a reinforcing member is buried inside the sound-absorbing plate, and a suspending member connected to the reinforcing member is provided in at least one portion of the sound-absorbing plate. A sound absorbing plate for hanging.
あるとともに連続気泡を有している請求項１記載の吊り
下げ用吸音板。2. The hanging sound absorbing plate according to claim 1, wherein said sound absorbing plate has a bulk specific gravity of 0.25 to 0.5 and has open cells.
記載の吊り下げ用吸音板。3. The reinforcing member is a reinforcing bar.
The suspended sound-absorbing plate as described.
のおのに吊り下げ用部材が設けられている請求項１、２
または３記載の吊り下げ用吸音板。4. A hanging member is provided on each of at least two small faces of said sound absorbing plate.
Or the sound absorbing plate for suspension according to 3.
請求項１、２、３または４記載の吊り下げ用吸音板。5. The hanging sound absorbing plate according to claim 1, wherein an irregular pattern is provided on the surface of the sound absorbing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12176097A JPH10299120A (en) | 1997-04-23 | 1997-04-23 | Suspending sound absorbing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12176097A JPH10299120A (en) | 1997-04-23 | 1997-04-23 | Suspending sound absorbing plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10299120A true JPH10299120A (en) | 1998-11-10 |
Family
ID=14819215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12176097A Pending JPH10299120A (en) | 1997-04-23 | 1997-04-23 | Suspending sound absorbing plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10299120A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002356936A (en) * | 2001-06-01 | 2002-12-13 | Tokyu Constr Co Ltd | Functional panel and its attaching method |
| JP2009000133A (en) * | 2007-06-19 | 2009-01-08 | Max:Kk | Noise reducing structure for game machine island |
| JP2013079538A (en) * | 2011-10-05 | 2013-05-02 | Tekkosha Buru:Kk | Acoustical panel set |
| CN104912215A (en) * | 2015-06-02 | 2015-09-16 | 北新集团建材股份有限公司 | Vertical hanging type mineral wool sound absorbing board lifting structure |
-
1997
- 1997-04-23 JP JP12176097A patent/JPH10299120A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002356936A (en) * | 2001-06-01 | 2002-12-13 | Tokyu Constr Co Ltd | Functional panel and its attaching method |
| JP2009000133A (en) * | 2007-06-19 | 2009-01-08 | Max:Kk | Noise reducing structure for game machine island |
| JP4716438B2 (en) * | 2007-06-19 | 2011-07-06 | 株式会社マックス | Noise reduction structure of Amusement Machine Island |
| JP2013079538A (en) * | 2011-10-05 | 2013-05-02 | Tekkosha Buru:Kk | Acoustical panel set |
| CN104912215A (en) * | 2015-06-02 | 2015-09-16 | 北新集团建材股份有限公司 | Vertical hanging type mineral wool sound absorbing board lifting structure |
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