JPS6250623B2 - - Google Patents
Info
- Publication number
- JPS6250623B2 JPS6250623B2 JP58105964A JP10596483A JPS6250623B2 JP S6250623 B2 JPS6250623 B2 JP S6250623B2 JP 58105964 A JP58105964 A JP 58105964A JP 10596483 A JP10596483 A JP 10596483A JP S6250623 B2 JPS6250623 B2 JP S6250623B2
- Authority
- JP
- Japan
- Prior art keywords
- vibration
- ceiling
- slab
- ceiling board
- air layer
- 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
Links
- 238000009423 ventilation Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 description 6
- 239000011358 absorbing material Substances 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/18—Means for suspending the supporting construction
- E04B2009/186—Means for suspending the supporting construction with arrangements for damping vibration
Description
【発明の詳細な説明】
本発明は防振吊り天井、ことに天井板に消音機
能を有する通気孔を設けてこの通気孔と天井裏の
空気層のバネとによる反共振を利用して防振効果
を向上せしめた防振吊り天井に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention provides vibration-proof suspended ceilings, in particular, vibration-proofing by providing a ventilation hole with a sound-deadening function in the ceiling panel and utilizing anti-resonance caused by the ventilation hole and the spring of the air layer in the attic. This article concerns a vibration-proof suspended ceiling with improved effectiveness.
従来上階の足音等（床衝撃音）が階下へ伝わる
のを防止するのに用いられた防振吊り天井は、天
井裏の空気がおおむね密封されているので、主と
して空気層のバネと天井板の質量との共振（厳密
には天井板の曲げ振動や防振ゴムのバネなども関
係する）による固有振動数が生じ、特にその固有
振動数と上階の床版の持つ固有振動数とが一致し
た場合は上階の振動は極めて良く天井板に伝わ
り、室内に騒音として放射された。 Anti-vibration suspended ceilings, which were conventionally used to prevent footsteps, etc. (floor impact noise) from upstairs, from being transmitted downstairs, are mainly used to prevent the air space under the ceiling from being sealed, so the air space is mainly affected by springs and ceiling panels. A natural frequency occurs due to resonance with the mass of the ceiling board (strictly speaking, the bending vibration of the ceiling board and the spring of the anti-vibration rubber are also involved), and in particular, this natural frequency and the natural frequency of the floor slab on the upper floor are If they matched, the vibrations from the upper floor would be extremely well transmitted to the ceiling panels and radiated into the room as noise.
本発明は天井板の要所に通気孔を設け、この通
気孔を通じて天井裏の空気が出入りできるように
することによつて、天井裏の空気層のバネを無力
化し、天井裏の空気層のバネと天井板の質量との
共振による固有振動数による悪影響を除くように
したものである。 The present invention provides ventilation holes at important points in the ceiling board, and allows the air in the attic to go in and out through these holes, thereby neutralizing the spring of the air space in the attic and reducing the air space in the attic. This is designed to eliminate the adverse effects of the natural frequency caused by resonance between the spring and the mass of the ceiling board.
すなわち、これらの通気孔は音響回路的には音
響イナータンスを形成し、天井裏の空気層のバネ
とは反共振を起すように働くので、先述の天井裏
の空気層のバネと天井板の質量との共振による固
有振動数を相殺する作用を持つ。 In other words, these vents form an acoustic inertance in terms of an acoustic circuit, and work to cause anti-resonance with the spring in the air layer in the attic, so the mass of the spring in the air layer in the attic and the ceiling board mentioned earlier is It has the effect of canceling out the natural frequency due to resonance with the
次にこの態様と音響等価回路によつて説明する
と、第１図のａが従来の防振吊り天井、ｂが本発
明の防振吊り天井の振動伝達情況を巨視的に示す
音響等価回路である。 Next, to explain this aspect and an acoustic equivalent circuit, in FIG. .
第１図ａの従来の防振吊り天井の振動伝達率は
次の(1)式で示される。 The vibration transmissibility of the conventional vibration-proof suspended ceiling shown in Figure 1a is expressed by the following equation (1).
ここで、 τ：振動伝達率 V1：入力振動速度 （ｍ／Ｓ） V2：出力振動速度 （ｍ／Ｓ） Kr：防振ゴムの動バネ定数 （Ｎ／m3） Kb：背後空気層の動バネ定数 （Ｎ／m3） Ｍ：天井板の質量 （Kg／m2） ω：角振動数 （rad／Ｓ） j2：−１ とする。 Here, τ: Vibration transmissibility V 1 : Input vibration velocity (m/S) V 2 : Output vibration velocity (m/S) Kr: Dynamic spring constant of vibration isolating rubber (N/m 3 ) Kb: Back air layer Dynamic spring constant (N/m 3 ) M: Mass of ceiling board (Kg/m 2 ) ω: Angular frequency (rad/S) j 2 :-1.
また、本発明の防振吊り天井の振動伝達率は次
の(2)式で示される。 Further, the vibration transmissibility of the vibration-proof suspended ceiling of the present invention is expressed by the following equation (2).
ここで、 Mg：開口部の音響イナータンス （Kg／m2） とする。 Here, Mg is the acoustic inertance of the opening (Kg/m 2 ).
第１図では省略しているが、実際はこれらの回
路の各部には抵抗素子が含まれているので、それ
らを考慮して両者の振動伝達率の傾向をグラフに
画くと、第２図のようになる。すなわち、曲線
ａ，ｂがそれぞれ第１図のａ，ｂの場合に相当
し、それぞれの共振および反共振による固有角振
動数は(3)、(4)式で得られる。 Although it is omitted in Figure 1, each part of these circuits actually includes a resistive element, so if we take these into account and draw a graph of the tendency of the vibration transmissibility of both, we will get the result shown in Figure 2. become. That is, curves a and b correspond to cases a and b in FIG. 1, respectively, and the respective natural angular frequencies due to resonance and anti-resonance are obtained by equations (3) and (4).
ここで、
ω＋：曲線ａのピークの角振動数 （rad／Ｓ）
ω−：曲線ｂのデイツプの角振動数 （rad／
Ｓ）
とする。 Here, ω + : Angular frequency of peak of curve a (rad/S) ω − : Angular frequency of dip of curve b (rad/S)
S).
従つて、上階の床衝撃音を天井板に最も伝え難
くするには、第２図の曲線ｂのデイツプの固有角
振動数を上階床版の固有角振動数に一致するよう
にする。 Therefore, in order to make it most difficult for the floor impact sound of the upper floor to be transmitted to the ceiling board, the natural angular frequency of the dip shown by curve b in FIG. 2 should be made to match the natural angular frequency of the upper floor slab.
第３図および第４図に例示した本発明の実施例
について本発明をさらに詳述する。 The invention will be described in further detail with reference to the embodiments of the invention illustrated in FIGS. 3 and 4. FIG.
第３図において建物躯体は鉄筋コンクリート等
のスラブまたは床版１と同じく鉄筋コンクリート
等の壁２とから成るものとして示されている。 In FIG. 3, the building frame is shown as consisting of a slab or floor slab 1 made of reinforced concrete or the like and walls 2 made of reinforced concrete or the like.
スラブまたは床版１には金属、プラスチツク、
木材等任意の材料から成るインサート８を埋め込
んであり、これに防振ハンガー６を取付けてあ
る。この防振ハンガー６はその上部部材が防振ゴ
ム７を介して下部部材に接続されている構成のも
ので、この防振ハンガー６の下部部材に、木材、
軽量形鋼等の野縁受け４を取付け、同様に木材、
軽量形鋼等から成る野縁３をこれに取付ける。こ
の野縁３に、プラスターボード等の遮音性のある
板材から成る天井板５を取付けるのである。天井
板５の壁２に接するところには、中空ゴム製のパ
ツキン材である回り縁９が設けてある。 The slab or floor slab 1 is made of metal, plastic,
An insert 8 made of any material such as wood is embedded, and a vibration-proof hanger 6 is attached to this. This anti-vibration hanger 6 has an upper member connected to a lower member via anti-vibration rubber 7, and the lower member of the anti-vibration hanger 6 is made of wood,
Attach the frame support 4 made of lightweight shaped steel, etc., and use wood, wood, etc.
A field edge 3 made of lightweight section steel or the like is attached to this. A ceiling board 5 made of a sound insulating board material such as plasterboard is attached to this veranda 3. A circumferential edge 9 made of hollow rubber packing material is provided at a portion of the ceiling plate 5 in contact with the wall 2.
天井板５の背後には床版１までの間に背後空気
層１０が形成されることとなる。 A back air layer 10 is formed behind the ceiling board 5 up to the floor slab 1.
さて本発明によればこのような吊り天井に通気
孔が設けてある。すなわち第３図および第４図に
示すように、この通気孔は、金属、プラスチツ
ク、木材、無機繊維材等から作つた外管１２に、
同様な材料から成り有孔面を有する内管１４を同
心に組合せて成るものである。これら外内管１
２，１４の間の空間には内管１４の有孔面１５を
覆う範囲にグラスウール、ロツクウール等の多孔
質吸音材料１６を配し、その上下を側面板１３で
閉じてある。内管１４の下端にはフランジ１７が
形成されており、内管１４の内部に形成された通
気路１１を天井板５に開けられた開孔２１に整合
させて、通気性面１９を持つ化粧板１８を天井板
５の下面に当てて、ビス２０で固定してある。従
つて前述の背後空気層１０はこの通気孔を介し室
内空間に連通せしめられることとなる。 Now, according to the invention, such a suspended ceiling is provided with ventilation holes. That is, as shown in FIGS. 3 and 4, this ventilation hole is provided in the outer tube 12 made of metal, plastic, wood, inorganic fiber material, etc.
It is constructed by concentrically combining inner tubes 14 made of similar materials and having perforated surfaces. These outer and inner tubes 1
In the space between 2 and 14, a porous sound absorbing material 16 such as glass wool or rock wool is disposed in a range covering the perforated surface 15 of the inner tube 14, and the upper and lower sides thereof are closed with side plates 13. A flange 17 is formed at the lower end of the inner tube 14, and the ventilation passage 11 formed inside the inner tube 14 is aligned with the opening 21 made in the ceiling plate 5, thereby forming a decorative structure having an air permeable surface 19. The plate 18 is placed against the lower surface of the ceiling plate 5 and fixed with screws 20. Therefore, the above-mentioned rear air layer 10 is communicated with the indoor space through this ventilation hole.
第３図の各部と第１図ｂの回路素子とを対比さ
せると、防振ゴム７がKr、背後空気層１０が
Kb、野縁３および野縁受け４および天井板５が
Ｍ、通気路１１および開孔２１がMg、スラブま
たは床版１の振動速度がV1、そして天井板５の
振動速度がV2となる。従つてこの実施例におけ
る各部の作用は前述の第１図、第２図による説明
と同じである。 Comparing each part in Figure 3 with the circuit element in Figure 1b, the vibration isolating rubber 7 is Kr, and the rear air layer 10 is
Kb, the field edge 3, field edge receiver 4, and ceiling plate 5 are M, the ventilation path 11 and the opening 21 are Mg, the vibration velocity of the slab or floor slab 1 is V 1 , and the vibration velocity of the ceiling plate 5 is V2 . Become. Therefore, the functions of each part in this embodiment are the same as those explained in FIGS. 1 and 2 above.
第３図において、回り縁９は壁２と天井板５と
の間を振動的に絶縁すると共にこれらの間の間隙
を塞ぎ、天井裏の騒音を遮断する働きをする。 In FIG. 3, the surrounding edge 9 serves to provide vibrational insulation between the wall 2 and the ceiling plate 5, close the gap between them, and block noise from the attic.
また多孔質吸音材料１６は通気路１１を伝わる
騒音を吸収させるためのもの、有孔面１５はその
表面の保護材料で、通気路１１、外管１２、側面
板１３、内管１４、吸音材料１６で消音ダクトが
形成されているとみることができる。 In addition, the porous sound-absorbing material 16 is for absorbing noise transmitted through the air passage 11, and the perforated surface 15 is a material for protecting the surface thereof. It can be seen that a sound deadening duct is formed at 16.
なお、天井裏にはグラスウールまたはロツクウ
ール等の吸音材料を入れることにより本発明の効
果をさらに高めることができよう。 Note that the effects of the present invention can be further enhanced by placing a sound absorbing material such as glass wool or rock wool in the attic.
第１図ａは従来の防振吊り天井の等価回路図、
第１図ｂは本発明の防振吊り天井の原理を説明す
る等価回路図、第２図は本発明の作用を説明する
グラフ、第３図は本発明の実施例を説明する断面
図、そして第４図は本発明の実施例の主要部分を
説明する斜視図である。
１……スラブまたは床版、２……壁、３……野
縁、４……野縁受け、５……天井板、６……防振
ハンガー、７……防振ゴム、８……インサート、
９……回り縁、１０……背後空気層、１１……通
気路、１２……外管、１３……側面板、１４……
内管、１５……有孔面、１６……多孔質吸音材
料、１７……フランジ、１８……化粧板、１９…
…通気性面、２０……ビス、２１……開孔。
Figure 1a is an equivalent circuit diagram of a conventional vibration-proof suspended ceiling.
FIG. 1b is an equivalent circuit diagram explaining the principle of the vibration-proof suspended ceiling of the present invention, FIG. 2 is a graph explaining the action of the present invention, FIG. 3 is a sectional view explaining an embodiment of the present invention, and FIG. 4 is a perspective view illustrating the main parts of the embodiment of the present invention. 1... Slab or floor slab, 2... Wall, 3... Field edge, 4... Field edge support, 5... Ceiling board, 6... Anti-vibration hanger, 7... Anti-vibration rubber, 8... Insert ,
9... Surrounding edge, 10... Back air layer, 11... Ventilation path, 12... Outer tube, 13... Side plate, 14...
Inner pipe, 15... Perforated surface, 16... Porous sound absorbing material, 17... Flange, 18... Decorative board, 19...
...Breathability surface, 20...screw, 21...opening.
Claims (1)
ーを介して吊された天井板に、この天井板の背後
に形成された背後空気層を室内空間に連通せしめ
る通気孔を設けたことを特徴とする防振吊り天
井。1. A ceiling board suspended from a slab or floor slab of a building via a vibration-proof hanger is provided with ventilation holes that communicate the back air layer formed behind the ceiling board to the indoor space. Anti-vibration suspended ceiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58105964A JPS59233055A (en) | 1983-06-15 | 1983-06-15 | Vibration-proof suspension ceiling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58105964A JPS59233055A (en) | 1983-06-15 | 1983-06-15 | Vibration-proof suspension ceiling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59233055A JPS59233055A (en) | 1984-12-27 |
| JPS6250623B2 true JPS6250623B2 (en) | 1987-10-26 |
Family
ID=14421471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58105964A Granted JPS59233055A (en) | 1983-06-15 | 1983-06-15 | Vibration-proof suspension ceiling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59233055A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03115629U (en) * | 1990-03-09 | 1991-11-29 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6006551B2 (en) * | 2012-07-05 | 2016-10-12 | 株式会社熊谷組 | building |
-
1983
- 1983-06-15 JP JP58105964A patent/JPS59233055A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03115629U (en) * | 1990-03-09 | 1991-11-29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59233055A (en) | 1984-12-27 |
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