JP3709791B2

JP3709791B2 - Soundproof panel

Info

Publication number: JP3709791B2
Application number: JP2001004773A
Authority: JP
Inventors: 健一岩沢; 肇鈴木; 隆太清水
Original assignee: Yamaha Corp
Current assignee: Yamaha Corp
Priority date: 2001-01-12
Filing date: 2001-01-12
Publication date: 2005-10-26
Anticipated expiration: 2021-01-12
Also published as: JP2002206294A

Description

【０００１】
【発明の属する技術分野】
本発明は、遮音板及びこれを用いた防音パネルに係り、更に詳しくは、所定の高音域帯で発生する遮音性能の落ち込みを低減ことのできる防音パネルに関する。
【０００２】
【従来の技術】
壁或いは天井等に用いられる公知の防音パネルとしては、例えば、図６に示されるようなものが知られている。この防音パネル５０は、一対の表面板５２，５２と、これら表面板５２，５２の外周に沿って当該表面板５２，５２間に介装された枠状の連結材５５と、各表面板５２，５２の各内面にそれぞれ全面接着された遮音シート５７とを備えて構成されている。
【０００３】
【発明が解決しようとする課題】
しかしながら、前記防音パネル５０にあっては、遮音シート５７が設けられていない防音パネルに比べて全周波数帯域で遮音性能が相対的に向上するが、遮音シート５７が各表面板５２に全面接着されているため、表面板５２，５２の厚み及び曲げ剛性等に起因して発生する高音域帯（２ｋＨｚ〜４ｋＨｚ）での遮音性能の低下現象（コインシデンス効果）を改善することができないという不都合がある。
【０００４】
【発明の目的】
本発明は、このような不都合に着目して案出されたものであり、その目的は、全周波数帯域で遮音性能を高めつつも、所定の高音域帯で発生する遮音性能の落ち込みを低減することができる防音パネルを提供することにある。
【０００５】
【課題を解決するための手段】
前記目的を達成するため、本発明は、第１の遮音板と当該第１の遮音板との間に連結材を介して設けられた第２の遮音板とを備えてなる防音パネルにおいて、
前記第１及び／又は第２の遮音板は、板材と、この板材の周縁よりも内側に離れた領域内に取り付けられるとともに、柔軟性を有するシート材からなる遮音シートとを備え、
前記遮音シートは、固定部材で板材との間に挟み込んで、部分的に開放する空気層を前記板材との間に形成した状態で当該板材に直接取り付けられる、という構成を採っている。このような構成によれば、板材と遮音シートとの間に空気層が形成されているため、板材の振動と遮音シートの振動との間に位相差を生じさせることができ、この位相差により振動エネルギーを損失させることができる。また、前記空気層が部分的に開放するため、遮音シートの外周側全域が板材に固定されなくなり、遮音シートが板材外周部分の屈曲振動の影響を受けにくくなる。以上の結果、遮音板の遮音性能を全体的に高めつつも、所定の高音域帯で発生する遮音性能の落ち込みを低減することができ、遮音性能を低音域から高音域までバランス良く発揮させることができる。また、遮音シートが芯材等を介さずに直接板材に取り付けられるため、空気層の厚みを薄くして遮音シートによる振動エネルギーの損失を効果的に行うことができるとともに、遮音板全体の厚みを薄くすることもできる。また、遮音シートを、例えば、ステープラーの針（ステープル）で所定間隔毎にスポット的に固定することが容易となる。この際、ステープルのピッチを１００mm程度にすると遮音性能が一層向上する。また、固定部材を遮音シート上に所定間隔毎に複数配置した場合、板材のサイズに応じて４５０ｍｍ〜２０００ｍｍ程度に設定すると遮音性能上更に良くなる。更に、固定部材の厚みとしては、３ｍｍ〜５ｍｍ程度に設定するとよい。これにより、固定部材による板材の振動拘束が軽減され、板材の屈曲振動エネルギーの増大を防ぐことができ、遮音効果をより高めることができる。
【０００６】
前記遮音シートは、前記第１及び第２の遮音板に設けられるとともに、これら遮音板の各板材と所定厚の固定部材との間に挟み込まれた状態で各板材にそれぞれ取り付けられ、前記第１の遮音板側の固定部材と第２の遮音板側の固定部材は、それらの少なくとも一部が千鳥配置される、という構成にするとよい。このような構成により、第１及び第２の遮音板にそれぞれ設けられた各遮音シートの振動の位相が相互にずれ、振動に関する内部損失エネルギーを増大させることができ、前述した効果を一層高めることができる。
【０００７】
【発明の実施の形態】
本発明における空気層の厚みは、５ｍｍ以上２０ｍｍ未満に設定するとよい。ここで、５ｍｍ未満では、板材の振動と、遮音シートに伝達された振動との位相のずれが小さくなり、前述の効果を殆ど期待できず、２０ｍｍ以上では、空気層の開放部分から空気が逃げ易くなるので、板材の振動は遮音シート外に伝達してしまい遮音シートによる振動エネルギーの損失効果が期待できなくなる。空気層の厚みとしては、好ましくは、５ｍｍ〜１０ｍｍにするとよい。
【０００９】
更に、前記遮音シートは、前記板材の周縁よりも５０ｍｍ以上内側に離れた領域内に設けられる、という構成を併用することもできる。これにより、遮音シートは、板材の外周側領域における屈曲振動の影響を一層受けにくくなり、遮音をより効果的に行うことができる。
【００１０】
なお、本明細書における「遮音板」或いは「防音パネル」は、特に限定されるものではないが、壁材、天井材として好適に用いられるものである。
【００１１】
【実施例】
以下、本発明の実施例について図面を参照しながら説明する。
【００１２】
［第１実施例］
図１には、第１実施例に係る壁或いは天井用の防音パネルの概略正面図が示されている。図２には、図１のＡ−Ａ線矢視拡大断面図が示され、図３には、図１のＢ−Ｂ線矢視拡大断面図が示されている。これらの図において、防音パネル１０は、相互に略同一構造となる第１及び第２の遮音板１１，１２と、これら第１及び第２の遮音板１１，１２の外周に沿って当該遮音板１１，１２間に介装される略方形木枠状の連結材１４とを備えて構成されている。なお、以下において、「高さ方向」とは、図１中上下方向を意味し、「幅方向」とは、同図中左右方向を意味する。
【００１３】
前記各遮音板１１，１２は、それらの縦断面形状が図２中左右略対称となるように配置されており、平面視略長方形状の表面板１６と、この表面板１６の内面側に設けられた遮音シート１７と、この遮音シート１７を表面板１６との間に挟み込む固定部材としての角材１８とによりそれぞれ構成されている。
【００１４】
前記表面板１６は、厚みが９ｍｍ以上となるパーチクルボード等の木質板或いは石膏ボード等によって形成されており、本実施例では、厚み９ｍｍのパーチクルボードが用いられている。
【００１５】
前記遮音シート１７は、アスファルトや軟質塩ビ等の樹脂に鉄粉を混入したものからなる柔軟性を有するシート材によって形成されており、本実施例では、厚み１ｍｍ程度の軟質塩ビに鉄粉を混入したものが用いられている。また、遮音シート１７は、前記連結材１４の厚みを考慮して表面板１６の周縁１６Ａよりも５０ｍｍ以上内側に離れた領域内に設けられ、当該周縁１６Ａ側領域での振動の影響を受けにくくしている。すなわち、遮音シート１７は、特に限定されるものではないが、厚み３０ｍｍの連結材１４の内周端１４Ａから２５ｍｍ以上内側に離れた略長方形状の領域内全域に遮音シート１７が配置されている。
【００１６】
前記角材１８は、合板等によって形成されており、遮音シート１７の高さ方向両端側に位置する上下角材１８Ａ，１８Ｂと、それらの略中間に位置する中間角材１８Ｃとからなる。これら各角材１８Ａ〜１８Ｃは、遮音シート１７の幅方向両端間に当該幅方向に沿ってそれぞれ延設されている。各角材１８Ａ〜１８Ｃには、その延出方向に沿って所定間隔毎にステープル２０が打ち込まれており、これによって、遮音シート１７が表面板１６に部分的に直接取り付けられる。ここで、各角材１８Ａ〜１８Ｃの延出方向におけるステープル２０の打ち込み間隔は、遮音性能向上の観点から１００ｍｍ程度が好ましい。また、各角材１８Ａ〜１８Ｃの高さ方向の離間幅は、防音パネル１０のサイズに応じて４５０ｍｍ〜２０００ｍｍ程度に設定するとよい。
【００１７】
このように、遮音シート１７は、その高さ方向三箇所に設けられた角材１８Ａ〜１８Ｃと表面板１６との間に挟み込まれることで固定されるようになっており、幅方向両端側が固定されない状態で表面板１６に貼付される。従って、遮音シート１７は、表面板１６への固定部位以外において、当該表面板１６との間に幅方向に開放する微小の空間すなわち空気層２２が形成されることになる。この空気層２２としては、５ｍｍ以上２０ｍｍ未満、好ましくは、５ｍｍ〜１０ｍｍ程度にするとよい。
【００１８】
次に、本発明の第２実施例について説明する。なお、以下の説明において、前記第１実施例と同一若しくは同等の構成部分については同一符号を用いるものとし、説明を省略若しくは簡略にする。
【００１９】
［第２実施例］
図４に示されるように、第２実施例に係る防音パネル３０は、前記第１の遮音板１１側の角材１８と第２の遮音板３２側の角材３４とを一部において千鳥配置に設けたところに特徴を有するものである。
【００２０】
第２の遮音板３２は、その角材３４の配置を第１実施例における第２の遮音板１２の角材１８に対して変えたものであり、その他の構成は第２の遮音板１２と略同一になっている。すなわち、角材３４は、遮音シート１７の高さ方向両端側に位置する上下角材３４Ａ，３４Ｂと、当該上下角材３４Ａ，３４Ｂの間において高さ方向二箇所に設けられた中間角材３４Ｃ，３４Ｄとからなり、高さ方向四箇所で表面板１７との間に遮音シート１７を挟み込むようになっている。中間角材３４Ｃ，３４Ｄは、対向する第１の遮音板１１の各角材１８Ａ〜１８Ｃに対してそれぞれ高さ方向に所定間隔ずれるように配置されている。ここで、第１の遮音板１１における角材１８Ａ〜１８Ｃと第２の遮音板３２における中間角材３４Ｃ，３４Ｄとの高さ方向のずれ幅を３００ｍｍ程度以上にすれば、遮音シート１７の振動の位相もずれるので、内部損失エネルギーの増加につながり、遮音効果を更に高めることができる。
【００２１】
図５には、本発明の遮音効果を確認するための実験結果が示されている。
同実験は、所定音源（ＯＮＯＳＯＫＫＩＳＲ５３００）が設置された音源室（容積５０．４９ｍ³）と、音響透過損失が測定される受音室（容積５０．４９ｍ³）との間の仕切壁の一部として、高さ方向寸法が約２０００ｍｍ、幅方向寸法が約９００ｍｍ、厚みが約５８ｍｍとなる第１実施例に係る防音パネル１０（面密度１７．４ｋｇ／ｍ³）を幅方向に二枚並べた場合と、防音パネル１０と同一サイズ、同一面密度に設けられた前記従来例の防音パネル５０（図６参照）を幅方向に二枚並べた場合とについて音響透過損失を測定したものである。また、各防音パネル１０，５０の透過部面積を、それぞれ１９９０ｍｍ×１７７５ｍｍとした。
なお、本実験においては、従来例の表面板５２、連結材５５、遮音シート５７を、実施例の表面板１６、連結材１４、遮音シート１７と略同一の材質及びサイズの厚みを有するものを用いた。特に、防音パネル１０にあっては、表面板１６における遮音シート１７の貼付面領域の高さ方向寸法が１６６０ｍｍに対し、遮音シート１７の高さ方向寸法を１６９０ｍｍとし、前記空気層２２の厚みを最大１０ｍｍ程度とした。
【００２２】
図５に示される実験結果によれば、第１実施例に係る防音パネル１０は、２ｋＨｚ〜４ｋＨｚの高音域帯で、従来例の防音パネル５０に対して遮音性能の落ち込みが大幅に改善されているのが明らかに理解されるであろう。
【００２３】
更に、以上の実験を第２実施例に係る防音パネル３０について行ったところ、第１実施例に係る防音パネル１０の場合よりも、更に遮音性能を高められ、また、高音域での遮音性能の落ち込みが更に改善された結果となった。
【００２４】
なお、前記各実施例において、遮音板１１，１２，３２をフラッシュ構造となる防音パネル１０，３０に適用したが、本発明はこれに限定されず、他の構造の防音パネル等に適用することもできる。また、遮音板１１，１２，３２を防音パネル１０，３０の何れか一方の面側のみに設けることも可能である。但し、前記各実施例のように、防音パネル１０，３０の表裏両面側に遮音板１１，１２，３２を設けた構成とすれば、片面側のみに設けた構成に比べ、遮音効果を略倍増させることができる。
【００２５】
また、遮音シート１７は、前述した態様で表面板１６に固定されていなくてもよく、要するに、部分的に開放する空気層２２を表面板１６との間に形成できる限り、例えば、遮音シート１７の挟み込みを二本の角材１８或いは四本以上の角材１８で行ったり、角材１８，３４を前述と相違する方向に沿って配置する等、種々の態様を採用することができる。
【００２６】
更に、前記各実施例においては、遮音シート１７を角材１８，３４と表面板１６との間に挟み込んでステープル等で部分的に固定したが、本発明はこれに限らず、前記空気層２２を形成できる限りにおいて、遮音シート１７を直接表面板１６に部分接着等することも可能である。
【００２７】
また、各表面板１６，１６と連結材１４とによって囲まれる空間に、１６ｋｇ／ｍ³〜３２ｋｇ／ｍ³程度のグラスウール等を介装すると、前述した遮音性能を一層高めることができる。
【００２８】
更に、本発明における装置各部の構成は図示構成例に限定されるものではなく、実質的に同様の作用を奏する限りにおいて、種々の変更が可能である。
【００２９】
【発明の効果】
以上説明したように、本発明によれば、遮音シートが板材に全面接着された従来構造と略同じように、遮音シートが設けられていない場合に比べ遮音性能を全体的に高めることができることに加え、遮音シートと板材との間に部分的に開放する空気層が形成されるため、高音域での遮音性能の落ち込みを従来構造よりも低減することができる。
【図面の簡単な説明】
【図１】第１実施例に係る防音パネルの概略正面図。
【図２】図１のＡ−Ａ線矢視拡大断面図。
【図３】図１のＢ−Ｂ線矢視拡大断面図。
【図４】第２実施例に係る防音パネルの拡大縦断面図。
【図５】第１実施例に係る防音パネルと従来例に係る防音パネルとについての遮音性能に関する実験結果を示すグラフ。
【図６】従来例に係る防音パネルの拡大縦断面図。
【符号の説明】
１０・・・防音パネル、１１・・・第１の遮音板、１２・・・第２の遮音板、１４・・・連結材、１６・・・表面板（板材）、１６Ａ・・・周縁、１７・・・遮音シート、１８・・・角材（固定部材）、２２・・・空気層、３０・・・防音パネル、３２・・・第２の遮音板、３４・・・角材（固定部材）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sound insulating plate and acoustic panel using the same, more particularly, it relates to soundproofing panel that can reduce the drop in sound insulation performance that occurs at a predetermined high range zone.
[0002]
[Prior art]
As a known soundproof panel used for a wall or a ceiling, for example, a panel as shown in FIG. 6 is known. The soundproof panel 50 includes a pair of surface plates 52, 52, a frame-shaped connecting member 55 interposed between the surface plates 52, 52 along the outer periphery of the surface plates 52, 52, and the surface plates 52. , 52 is provided with a sound insulation sheet 57 adhered to the entire surface.
[0003]
[Problems to be solved by the invention]
However, in the sound insulation panel 50, the sound insulation performance is relatively improved in all frequency bands as compared with the sound insulation panel in which the sound insulation sheet 57 is not provided. However, the sound insulation sheet 57 is bonded to each surface plate 52 over the entire surface. Therefore, there is an inconvenience that the sound insulation performance lowering phenomenon (coincidence effect) in the high sound band (2 kHz to 4 kHz) generated due to the thickness and bending rigidity of the surface plates 52 and 52 cannot be improved. .
[0004]
OBJECT OF THE INVENTION
The present invention has been devised by paying attention to such inconveniences, and its purpose is to reduce the drop in the sound insulation performance that occurs in a predetermined high frequency band while enhancing the sound insulation performance in the entire frequency band. it is to provide a soundproofing panel that can be.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a sound insulation panel comprising a first sound insulation plate and a second sound insulation plate provided via a connecting material between the first sound insulation plate,
The first and / or second sound insulation plate is provided with a plate material, and a sound insulation sheet made of a flexible sheet material and attached to a region separated from the periphery of the plate material.
The sound insulation sheet is sandwiched between a plate member by a fixing member, and is configured to be directly attached to the plate member in a state where a partially opened air layer is formed between the plate member . According to such a configuration, since an air layer is formed between the plate material and the sound insulation sheet, a phase difference can be generated between the vibration of the plate material and the vibration of the sound insulation sheet. Vibration energy can be lost. In addition, since the air layer is partially opened, the entire outer peripheral side of the sound insulating sheet is not fixed to the plate material, and the sound insulating sheet is less susceptible to the bending vibration of the outer peripheral portion of the plate material. As a result of the above, while improving the overall sound insulation performance of the sound insulation board, it is possible to reduce the drop in the sound insulation performance that occurs in the specified high sound range, and to exhibit the sound insulation performance in a balanced manner from the low sound range to the high sound range. Can do. In addition, since the sound insulation sheet is directly attached to the plate material without using a core material or the like, the thickness of the air layer can be reduced, and vibration energy can be effectively lost by the sound insulation sheet. It can also be made thinner. In addition, it becomes easy to fix the sound insulation sheet in a spot manner at predetermined intervals with a staple (staple) of a stapler, for example. At this time, if the staple pitch is about 100 mm, the sound insulation performance is further improved. In addition, when a plurality of fixing members are arranged on the sound insulation sheet at predetermined intervals, the sound insulation performance is further improved by setting the fixing member to about 450 mm to 2000 mm according to the size of the plate material. Furthermore, the thickness of the fixing member may be set to about 3 mm to 5 mm. Thereby, the vibration restraint of the board | plate material by a fixing member is reduced, the increase in the bending vibration energy of a board | plate material can be prevented, and the sound insulation effect can be improved more.
[0006]
Before Symbol sound insulating sheet is provided in an the first and second sound insulating plates, respectively mounted on each plate in a state of being sandwiched between the plate and the predetermined thickness of the fixing member of the sound insulating plate, said first The fixing member on the first sound insulating plate side and the fixing member on the second sound insulating plate side may be configured such that at least a part of them is arranged in a staggered manner. With such a configuration, the phases of the vibrations of the respective sound insulation sheets respectively provided on the first and second sound insulation plates are shifted from each other, and the internal loss energy related to vibration can be increased, further enhancing the above-described effects. Can do.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The thickness of the air layer in the present invention is preferably set to 5 mm or more and less than 20 mm. Here, if it is less than 5 mm, the phase shift between the vibration of the plate material and the vibration transmitted to the sound insulation sheet becomes small, and the above-mentioned effect can hardly be expected, and if it is 20 mm or more, air escapes from the open portion of the air layer. Therefore, the vibration of the plate material is transmitted to the outside of the sound insulation sheet, and the loss effect of vibration energy by the sound insulation sheet cannot be expected. The thickness of the air layer is preferably 5 mm to 10 mm.
[0009]
Furthermore, the sound insulation sheet can be used in combination with a configuration in which the sound insulation sheet is provided in a region separated by 50 mm or more inside from the periphery of the plate material. As a result, the sound insulation sheet is less susceptible to the influence of bending vibration in the outer peripheral side region of the plate material, and sound insulation can be performed more effectively.
[0010]
The “sound insulation board” or “sound insulation panel” in the present specification is not particularly limited, but is suitably used as a wall material or a ceiling material.
[0011]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0012]
[First embodiment]
FIG. 1 shows a schematic front view of a soundproof panel for a wall or ceiling according to the first embodiment. 2 is an enlarged cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is an enlarged cross-sectional view taken along line BB in FIG. In these drawings, the sound insulation panel 10 includes first and second sound insulation plates 11 and 12 having substantially the same structure, and the sound insulation plates along the outer peripheries of the first and second sound insulation plates 11 and 12. 11 and 12, and a connecting member 14 having a substantially rectangular wooden frame shape. In the following description, the “height direction” means the vertical direction in FIG. 1, and the “width direction” means the horizontal direction in FIG.
[0013]
The sound insulation plates 11 and 12 are arranged so that their longitudinal cross-sectional shapes are substantially symmetrical in the left-right direction in FIG. 2, and are provided on the surface plate 16 having a substantially rectangular shape in plan view and on the inner surface side of the surface plate 16. The sound insulation sheet 17 and the square member 18 as a fixing member that sandwiches the sound insulation sheet 17 between the surface plate 16 and the sound insulation sheet 17.
[0014]
The surface plate 16 is formed of a wooden board such as a particle board having a thickness of 9 mm or more, or a gypsum board. In this embodiment, a particle board having a thickness of 9 mm is used.
[0015]
The sound insulation sheet 17 is formed of a flexible sheet material made of a resin such as asphalt or soft PVC mixed with iron powder. In this embodiment, iron powder is mixed into soft PVC having a thickness of about 1 mm. Is used. In addition, the sound insulation sheet 17 is provided in a region 50 mm or more away from the peripheral edge 16A of the surface plate 16 in consideration of the thickness of the connecting member 14, and is hardly affected by vibration in the peripheral side 16A side region. are doing. That is, the sound insulation sheet 17 is not particularly limited, but the sound insulation sheet 17 is disposed in the entire region in a substantially rectangular region that is separated from the inner peripheral end 14A of the connecting member 14 having a thickness of 30 mm by 25 mm or more inside. .
[0016]
The square member 18 is formed of plywood or the like, and includes upper and lower square members 18A and 18B positioned on both ends in the height direction of the sound insulating sheet 17, and an intermediate square member 18C positioned substantially in the middle thereof. Each of the square members 18 </ b> A to 18 </ b> C is extended between both ends in the width direction of the sound insulating sheet 17 along the width direction. Staples 20 are driven into the square members 18A to 18C at predetermined intervals along the extending direction, whereby the sound insulating sheet 17 is partially attached directly to the surface plate 16. Here, the driving distance of the staples 20 in the extending direction of the square members 18A to 18C is preferably about 100 mm from the viewpoint of improving the sound insulation performance. Moreover, the separation width in the height direction of each of the square members 18 </ b> A to 18 </ b> C may be set to about 450 mm to 2000 mm according to the size of the soundproof panel 10.
[0017]
As described above, the sound insulating sheet 17 is fixed by being sandwiched between the square members 18A to 18C provided at three places in the height direction and the surface plate 16, and the both ends in the width direction are not fixed. Affixed to the surface plate 16 in a state. Therefore, the sound insulating sheet 17 is formed with a minute space, that is, an air layer 22 that is open in the width direction between the sound insulating sheet 17 and the surface plate 16 other than the portion fixed to the surface plate 16. The air layer 22 may be 5 mm or more and less than 20 mm, preferably about 5 mm to 10 mm.
[0018]
Next, a second embodiment of the present invention will be described. In the following description, the same reference numerals are used for the same or equivalent components as in the first embodiment, and the description is omitted or simplified.
[0019]
[Second Embodiment]
As shown in FIG. 4, the soundproof panel 30 according to the second embodiment is provided with a square member 18 on the first sound insulation plate 11 side and a square member 34 on the second sound insulation plate 32 side in a staggered arrangement. It has some features.
[0020]
The second sound insulation plate 32 is obtained by changing the arrangement of the square members 34 with respect to the square members 18 of the second sound insulation plate 12 in the first embodiment, and other configurations are substantially the same as those of the second sound insulation plate 12. It has become. That is, the square member 34 is composed of upper and lower square members 34A and 34B positioned on both ends in the height direction of the sound insulating sheet 17, and intermediate square members 34C and 34D provided at two positions in the height direction between the upper and lower square members 34A and 34B. Thus, the sound insulation sheet 17 is sandwiched between the surface plate 17 at four places in the height direction. The intermediate square members 34C and 34D are arranged so as to be shifted from each of the square members 18A to 18C of the opposing first sound insulating plate 11 by a predetermined distance in the height direction. Here, if the deviation width in the height direction between the square members 18A to 18C in the first sound insulation plate 11 and the intermediate square members 34C and 34D in the second sound insulation plate 32 is about 300 mm or more, the phase of vibration of the sound insulation sheet 17 is increased. Therefore, the internal loss energy is increased and the sound insulation effect can be further enhanced.
[0021]
FIG. 5 shows the experimental results for confirming the sound insulation effect of the present invention.
In this experiment, a partition wall between a sound source chamber (volume 50.49 m ³ ) where a predetermined sound source (ONO SOKKI SR5300) is installed and a sound receiving chamber (volume 50.49 m ³ ) in which sound transmission loss is measured. As a part, two soundproof panels 10 (surface density 17.4 kg / m ³ ) according to the first embodiment having a height direction dimension of about 2000 mm, a width direction dimension of about 900 mm, and a thickness of about 58 mm are arranged in the width direction. The sound transmission loss was measured for the case where the two soundproof panels 50 (see FIG. 6) of the conventional example provided in the same size and the same surface density as the soundproof panel 10 are arranged in the width direction. is there. Moreover, the transmission part area of each soundproof panel 10 and 50 was made into 1990 mm x 1775 mm, respectively.
In this experiment, the surface plate 52, the connecting material 55, and the sound insulating sheet 57 of the conventional example have substantially the same material and size thickness as the surface plate 16, the connecting material 14, and the sound insulating sheet 17 of the example. Using. In particular, in the soundproof panel 10, the height direction dimension of the sound insulation sheet 17 is 1690 mm while the height direction dimension of the application surface area of the sound insulation sheet 17 on the surface plate 16 is 1690 mm, and the thickness of the air layer 22 is set. The maximum was about 10 mm.
[0022]
According to the experimental results shown in FIG. 5, the soundproof panel 10 according to the first example has a drastic improvement in the sound insulation performance compared with the soundproof panel 50 of the conventional example in the high frequency band of 2 kHz to 4 kHz. It will be clearly understood that
[0023]
Furthermore, when the above experiment was performed on the soundproof panel 30 according to the second embodiment, the sound insulation performance was further improved as compared with the case of the soundproof panel 10 according to the first embodiment, and the sound insulation performance in the high sound range was improved. The decline was further improved.
[0024]
In each of the above-described embodiments, the sound insulating plates 11, 12, and 32 are applied to the soundproof panels 10 and 30 having a flash structure. However, the present invention is not limited to this, and may be applied to soundproof panels having other structures. You can also. It is also possible to provide the sound insulating plates 11, 12, 32 only on one surface side of the soundproof panels 10, 30. However, if the sound insulation plates 11, 12, 32 are provided on the front and back both sides of the sound insulation panels 10, 30 as in the above embodiments, the sound insulation effect is substantially doubled compared to the structure provided only on one side. Can be made.
[0025]
In addition, the sound insulating sheet 17 may not be fixed to the surface plate 16 in the above-described manner. In short, as long as the air layer 22 that is partially opened can be formed between the sound insulating sheet 17 and the surface plate 16, for example, the sound insulating sheet 17 Various modes can be employed, such as two square members 18 or four or more square members 18 being disposed, or by arranging the square members 18 and 34 along a direction different from the above.
[0026]
Further, in each of the above embodiments, the sound insulating sheet 17 is sandwiched between the square members 18 and 34 and the surface plate 16 and partially fixed with staples or the like. However, the present invention is not limited to this, and the air layer 22 is not limited thereto. As long as it can be formed, the sound insulation sheet 17 can be directly bonded to the surface plate 16 or the like.
[0027]
Further, in a space surrounded by the connecting member 14 and the face sheet 16 and 16, when interposed 16kg / m ^³ ~32kg / m ³ approximately such as glass wool, can be further enhanced the above-described sound insulation.
[0028]
Furthermore, the configuration of each part of the apparatus according to the present invention is not limited to the illustrated configuration example, and various modifications are possible as long as substantially the same operation is achieved.
[0029]
【The invention's effect】
As described above, according to the present invention, the sound insulation performance can be improved as a whole as compared with the case where the sound insulation sheet is not provided, as in the conventional structure in which the sound insulation sheet is entirely bonded to the plate material. In addition, since an air layer that is partially opened is formed between the sound insulation sheet and the plate material, it is possible to reduce the drop in the sound insulation performance in the high sound range as compared with the conventional structure.
[Brief description of the drawings]
FIG. 1 is a schematic front view of a soundproof panel according to a first embodiment.
FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG.
3 is an enlarged sectional view taken along line BB in FIG.
FIG. 4 is an enlarged longitudinal sectional view of a soundproof panel according to a second embodiment.
FIG. 5 is a graph showing experimental results regarding sound insulation performance of the soundproof panel according to the first example and the soundproof panel according to the conventional example.
FIG. 6 is an enlarged longitudinal sectional view of a soundproof panel according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Soundproof panel, 11 ... 1st sound insulation board, 12 ... 2nd sound insulation board, 14 ... Connection material, 16 ... Surface board (plate material), 16A ... Perimeter, 17 ... Sound insulation sheet, 18 ... Square material (fixing member), 22 ... Air layer, 30 ... Sound insulation panel, 32 ... Second sound insulation plate, 34 ... Square material (fixing member)

Claims

In the sound insulation panel comprising the second sound insulation plate provided via the connecting material between the first sound insulation plate and the first sound insulation plate,
The first and / or second sound insulation plate is provided with a plate material and a sound insulation sheet made of a flexible sheet material and attached to a region separated from the periphery of the plate material.
The sound insulation sheet, wherein the sound insulation sheet is directly attached to the plate member in a state of being sandwiched between the plate member by a fixing member and forming a partially open air layer between the plate member and the plate member.

The sound insulation sheet is provided on the first and second sound insulation plates, and the first sound insulation plate side fixing member and the second sound insulation plate side fixing member are at least partially arranged in a staggered manner. The soundproof panel according to claim 1, wherein:

The soundproof panel according to claim 1 or 2, wherein the thickness of the air layer is set to 5 mm or more and less than 20 mm.