JP4268112B2 - Double wall structure - Google Patents

Double wall structure Download PDF

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JP4268112B2
JP4268112B2 JP2004300305A JP2004300305A JP4268112B2 JP 4268112 B2 JP4268112 B2 JP 4268112B2 JP 2004300305 A JP2004300305 A JP 2004300305A JP 2004300305 A JP2004300305 A JP 2004300305A JP 4268112 B2 JP4268112 B2 JP 4268112B2
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plate
internal space
wall structure
partition
double wall
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JP2006113279A (en
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一樹 次橋
宏樹 上田
俊光 田中
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Kobe Steel Ltd
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Kobe Steel Ltd
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Priority to DE112005002128T priority patent/DE112005002128T5/en
Priority to PCT/JP2005/014954 priority patent/WO2006027936A1/en
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Description

本発明は二重壁構造体に係り、より詳細には、遮音性に優れる二重壁構造体の構成に関する。   The present invention relates to a double wall structure, and more particularly, to a configuration of a double wall structure excellent in sound insulation.

自動車に用いられる部品としてのドアやフード、トランクリッドなどに二重壁構造体を使用することが従来から提案されている（例えば、特許文献１及び２参照）。この従来例の構成を模式的に図９に示す。この従来例の二重壁構造体１’は、所定の距離を隔てて相対する板状体２，３の間に内部空間４が形成されるとともに、当該内部空間４が側板５によって閉鎖された、中空箱状の構成とされている。
特開２００２−９６６３６号公報 特開２００３−１１８３６４号公報 Conventionally, it has been proposed to use a double wall structure for doors, hoods, trunk lids and the like as parts used in automobiles (see, for example, Patent Documents 1 and 2). The configuration of this conventional example is schematically shown in FIG. In the conventional double-wall structure 1 ′, an internal space 4 is formed between plate-like bodies 2 and 3 facing each other with a predetermined distance, and the internal space 4 is closed by a side plate 5. The structure is a hollow box.
JP 2002-96636 A JP 2003-118364 A

しかし、上記特許文献１に示すような二重壁構造体１’において、下側から騒音の音波が入射され、当該騒音が特定の周波数の音成分を含んでいると、その音成分に対し内部空間４での共鳴（主に板状体２，３に平行な方向の共鳴）が発生することによって、放射面たる上側の板状体３の振幅が増大してしまい、放射音の増大により遮音性能が低下してしまっていた。   However, in the double-wall structure 1 ′ as shown in Patent Document 1, when a sound wave of noise is incident from the lower side and the noise includes a sound component of a specific frequency, the sound component is internally The resonance in the space 4 (mainly in the direction parallel to the plate-like bodies 2 and 3) causes the amplitude of the upper plate-like body 3 serving as the radiation surface to increase, and the sound is insulated due to the increase in radiation sound. The performance was degraded.

本発明は以上の点に鑑みてされたものであり、その目的は、特定の周波数の音に対する音響透過量増大を抑制し、様々な周波数の音について安定して遮音性能を発揮し得る二重壁構造体を提供することにある。   The present invention has been made in view of the above points, and its purpose is to suppress an increase in the amount of sound transmission with respect to sound of a specific frequency, and to achieve a sound insulation performance stably for sound of various frequencies. It is to provide a wall structure.

課題を解決するための手段及び効果Means and effects for solving the problems

本発明の解決しようとする課題は以上の如くであり、次にこの課題を解決するための手段とその効果を説明する。   The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

◆本発明の第１の観点によれば、相対する板状体の間に内部空間が形成されるとともに当該内部空間が閉鎖されている二重壁構造体において、前記相対する板状体の間に、前記内部空間における空気の粒子運動を妨げる仕切りが設けられている、二重壁構造体が提供される。   ◆ According to the first aspect of the present invention, in a double wall structure in which an internal space is formed between opposing plate-like bodies and the internal space is closed, the space between the opposing plate-like bodies is Further, a double wall structure is provided in which a partition that prevents particle movement of air in the internal space is provided.

なお、「閉鎖」とは、厳密な密閉のみを意味するものではなく、一部隙間や開口部がある場合も含む。これは以下においても同様である。   “Closed” does not mean only strict sealing but also includes a case where there is a gap or an opening. The same applies to the following.

これにより、仕切りの作用によって共鳴周波数が変更されることによって内部空間全体の共鳴を抑えることができる。これにより内部空間の音圧が低下し、放射面側の加振力が低下するので、放射面の振動が減少し、音響透過損失の落込みを抑制できる。この結果、遮音性に優れる構造体を得ることができる。   Thereby, the resonance of the whole internal space can be suppressed by changing the resonance frequency by the action of the partition. As a result, the sound pressure in the internal space is reduced and the excitation force on the radiation surface side is reduced, so that the vibration on the radiation surface is reduced and the drop in sound transmission loss can be suppressed. As a result, a structure having excellent sound insulation can be obtained.

◆前記の二重壁構造体においては、前記仕切りによって仕切られた空間に、空気の粒子運動を妨げるための充填部材が設けられていることが好ましい。   In the double wall structure, it is preferable that a filling member for preventing particle movement of air is provided in the space partitioned by the partition.

この構成では、前記の共鳴抑制効果のほか、仕切りによって仕切られた空間での共鳴を前記充填部材によって抑制することも可能であり、音響透過損失の落込みを更に良好に抑制できる。   In this configuration, in addition to the above-described resonance suppression effect, resonance in the space partitioned by the partition can also be suppressed by the filling member, and the drop in sound transmission loss can be suppressed further satisfactorily.

◆本発明の第２の観点によれば、相対する板状体の間に内部空間が形成されるとともに当該内部空間が閉鎖されている二重壁構造体において、前記内部空間の一部に、空気の粒子運動を妨げるための充填部材が設けられている、二重壁構造体が提供される。   ◆ According to the second aspect of the present invention, in a double wall structure in which an internal space is formed between opposing plate-like bodies and the internal space is closed, a part of the internal space is A double wall structure is provided in which a filler member is provided to prevent air particle motion.

この構成では、内部空間の一部において空気の粒子運動が充填部材によって妨げられるため、内部空間全体における共鳴が抑制され、音響透過損失の落込みを抑制できる。この結果、遮音性に優れる構造体を得ることができる。   In this configuration, since the particle movement of air is hindered by the filling member in a part of the internal space, resonance in the entire internal space is suppressed, and a drop in sound transmission loss can be suppressed. As a result, a structure having excellent sound insulation can be obtained.

◆前記の二重壁構造体においては、前記充填部材が独立気泡の発泡体で構成されていることが好ましい。   In the double wall structure, it is preferable that the filling member is formed of a closed cell foam.

これにより、空気の粒子運動を効果的に低減できる構造の充填部材を、軽量かつ低コストで得ることができる。   Thereby, the filling member having a structure capable of effectively reducing the particle motion of air can be obtained at a low weight and at a low cost.

次に、発明の実施の形態を説明する。図１から図８には二重壁構造体の実施例がそれぞれ示されており、以下、順を追って説明する。   Next, embodiments of the invention will be described. FIGS. 1 to 8 show examples of double-wall structures, which will be described in order.

図１に模式図を示す実施例１−１の二重壁構造体は、乗用車の部品としてのドアを想定したものである。この二重壁構造体１は、平行に配置されるとともに互いに所定の距離をおいて相対する板状体２，３を備えている。板状体２，３は一方向に若干長い長方形状に構成されており、２枚の対向する板状体２，３の間には、内部空間４が形成される。板状体２，３同士を繋ぐように側板５が設けられており、これによって内部空間４はほぼ閉鎖される。言い換えれば本実施形態の二重壁構造体１は、二重壁たる板状体２，３と、前記側板５とで、前記内部空間４を囲む箱状に構成されている。   The double wall structure of Example 1-1 whose schematic diagram is shown in FIG. 1 assumes a door as a passenger car component. The double wall structure 1 includes plate-like bodies 2 and 3 which are arranged in parallel and are opposed to each other at a predetermined distance. The plate-like bodies 2 and 3 are formed in a rectangular shape that is slightly longer in one direction, and an internal space 4 is formed between the two opposing plate-like bodies 2 and 3. A side plate 5 is provided so as to connect the plate-like bodies 2 and 3 to each other, whereby the internal space 4 is substantially closed. In other words, the double wall structure 1 of the present embodiment is configured in a box shape surrounding the internal space 4 with the plate-like bodies 2 and 3 that are double walls and the side plate 5.

そして本実施形態では、前記内部空間４のうち前記板状体２に近い側の一部を仕切るように、矩形板状の仕切板（仕切り）１３・１３を設けている。この実施例１−１では、２枚の仕切板１３・１３を十字状に直交させて、内部空間４の下側の一部領域を４つに仕切って（区画して）いる。仕切板１３・１３の素材としては、例えば、鉄、アルミ、樹脂、繊維強化複合材料、紙などを採用できる。   In this embodiment, rectangular plate-like partition plates (partitions) 13 and 13 are provided so as to partition a part of the internal space 4 on the side close to the plate-like body 2. In Example 1-1, the two partition plates 13 and 13 are orthogonally crossed to partition (partition) a partial area below the internal space 4 into four. As the material of the partition plates 13 and 13, for example, iron, aluminum, resin, fiber reinforced composite material, paper, or the like can be employed.

上記構成において、下側から板状体２側が騒音によって音圧加振される場合を考える。騒音が特定の周波数の音成分を含んでいると、板状体２が振動することにより内部空間４の長手方向又は短手方向で共鳴が起ころうとする。しかしながら、内部空間４のうち下側の空間では、仕切板１３・１３によって空気の粒子運動が妨げられる結果、共鳴周波数が変更される。従って、内部空間４全体でみたときに共鳴モードが形成されにくくなり、共鳴が抑えられる。以上の結果、放射面たる上側の板状体３の加振力が低下するので、放射面の振幅が低減され、音響透過損失の落込みを低減できる。   In the above configuration, consider the case where the plate-like body 2 side is vibrated by sound pressure from below. When the noise includes a sound component having a specific frequency, the plate-like body 2 vibrates, and resonance tends to occur in the longitudinal direction or the lateral direction of the internal space 4. However, in the lower space of the internal space 4, the resonance frequency is changed as a result of the air particle movement being blocked by the partition plates 13 and 13. Therefore, it is difficult to form a resonance mode when viewed in the entire internal space 4, and resonance is suppressed. As a result, since the excitation force of the upper plate-like body 3 serving as the radiation surface is reduced, the amplitude of the radiation surface is reduced, and the drop in sound transmission loss can be reduced.

なお、図１の実施例１−１において、仕切板１３は、板状体２，３の長手方向に直交する方向のほか、幅方向（短手方向）に直交する方向にも設けている。即ち、仕切板１３・１３は十字状に配置され、内部空間４の一部領域を縦横に区画している。この結果、実施例１−１では、板状体２，３の長手方向のみでなく幅方向の共鳴も抑制できる。言い換えれば、二つの音圧モード方向における共鳴を抑制し得る構成となっている。ただし、一つの音圧モード方向の共鳴を抑制できれば十分な場合は、仕切板１３を１枚のみ設けても構わない。   In addition, in Example 1-1 of FIG. 1, the partition plate 13 is provided not only in the direction orthogonal to the longitudinal direction of the plate-like bodies 2 and 3 but also in the direction orthogonal to the width direction (short direction). That is, the partition plates 13 and 13 are arranged in a cross shape and divide a partial region of the internal space 4 vertically and horizontally. As a result, in Example 1-1, not only the longitudinal direction of the plate-like bodies 2 and 3 but also the resonance in the width direction can be suppressed. In other words, the resonance can be suppressed in the two sound pressure mode directions. However, if it is sufficient if the resonance in one sound pressure mode direction can be suppressed, only one partition plate 13 may be provided.

図２には実施例１−２が示され、この構成においては、前記実施例１−１（図１）とは逆に、前記内部空間４のうち板状体３に近い側の一部を仕切るように、仕切板１３・１３を設けている。即ち、実施例１−２では、２枚の仕切板１３・１３を十字状に直交させて、内部空間４の上側の一部領域を４つに仕切って（区画して）いる。   FIG. 2 shows an embodiment 1-2. In this configuration, in contrast to the embodiment 1-1 (FIG. 1), a part of the internal space 4 on the side close to the plate-like body 3 is shown. Partition plates 13 and 13 are provided so as to partition. That is, in Example 1-2, the two partition plates 13 and 13 are orthogonally crossed, and a partial region on the upper side of the internal space 4 is partitioned (partitioned) into four.

図３には実施例１−３が示され、この構成において仕切板１３・１３は、前記内部空間４の全部を縦横に区画するように設けている。   FIG. 3 shows Example 1-3, and in this configuration, the partition plates 13 and 13 are provided so as to partition the entire internal space 4 vertically and horizontally.

図４には実施例１−４が示され、この構成においては、前記内部空間４のうち２枚の板状体２，３の間の中央部分のみを仕切るように、仕切板１３・１３を設けている。即ち、実施例１−４では、２枚の仕切板１３・１３を十字状に直交させて、内部空間４の上下中央側の一部領域を４つに仕切って（区画して）いる。   FIG. 4 shows Example 1-4. In this configuration, the partition plates 13 and 13 are arranged so as to partition only the central portion between the two plate-like bodies 2 and 3 in the internal space 4. Provided. That is, in Example 1-4, the two partition plates 13 and 13 are orthogonally crossed, and a partial region on the upper and lower central sides of the internal space 4 is partitioned (partitioned) into four.

図５には実施例１−５が示され、この構成においては、前記内部空間４のうち２枚の板状体２，３にそれぞれ近い側の一部を仕切るように、仕切板１３・１３を設けている。即ち、実施例１−５では、内部空間４のうち上下中央側を除いた両側の領域を、それぞれ、２枚の仕切板１３・１３を十字状に設置することで４つに仕切って（区画して）いる。   FIG. 5 shows an embodiment 1-5. In this configuration, the partition plates 13 and 13 are configured so as to partition a part of the internal space 4 on the side close to the two plate-like bodies 2 and 3 respectively. Is provided. That is, in Example 1-5, the area | region of the both sides except the upper-lower center side among the interior spaces 4 is divided into four by installing the two partition plates 13 and 13 in a cross shape (partition). is doing.

図６には実施例１−６が示され、この構成においては、二重壁構造体の内部空間４に固定される何らかの機器の固定部材１２が、仕切りとしての役割、即ち、図１〜図５までに示した仕切板１３と同様の役割を兼ねるようになっている。図６に例示するように、図１〜図５で説明した仕切板１３は、機器の固定部材１２を兼ねるようにして設けたり、あるいは、機器の固定部材１２と一体であるように設けたりすることができる。また、内部空間４に固定される機器の本体の一部を兼ねるように前記仕切板１３を設けても良い。内部空間４に固定される機器としては、二重壁構造体１を自動車に用いられる部品としてのドアに適用する場合は、例えば、ドアガラス昇降用機器、サイドインパクトドアビーム、インナー若しくはインナーの一部などを挙げることができる。   FIG. 6 shows Example 1-6. In this configuration, the fixing member 12 of any device fixed to the internal space 4 of the double wall structure serves as a partition, that is, FIGS. It plays the same role as the partition plate 13 shown up to 5. As illustrated in FIG. 6, the partition plate 13 described with reference to FIGS. 1 to 5 is provided so as to serve as the fixing member 12 of the device, or is provided so as to be integrated with the fixing member 12 of the device. be able to. Further, the partition plate 13 may be provided so as to also serve as a part of the main body of the device fixed in the internal space 4. As a device fixed to the internal space 4, when the double wall structure 1 is applied to a door as a part used in an automobile, for example, a door glass lifting / lowering device, a side impact door beam, an inner or a part of an inner And so on.

図７には実施例２−１が示され、この構成においては、前記内部空間４の前記板状体３に近い側に、直方体状の充填部材１４を設けている。この実施例２−１では、内部空間４の上側の一部領域を隙間なく埋めるように、充填部材１４が設置されている。   Example 2-1 is shown in FIG. 7, and in this configuration, a rectangular parallelepiped filling member 14 is provided on the side of the internal space 4 close to the plate-like body 3. In Example 2-1, the filling member 14 is installed so as to fill a partial region on the upper side of the internal space 4 without a gap.

上記構成において、下側から板状体２側が騒音によって音圧加振される場合を考える。騒音が特定の周波数の音成分を含んでいると、板状体２が振動することにより内部空間４の長手方向又は短手方向で共鳴が起ころうとする。しかしながら、内部空間４のうち上側の空間では、充填部材１４によって空気の粒子運動が妨げられる。従って、内部空間４全体でみたときに共鳴モードが形成されにくくなり、共鳴が抑えられる。以上の結果、放射面たる上側の板状体３の加振力が低下するので、放射面の振幅が低減され、音響透過損失の落込みを低減できる。   In the above configuration, consider the case where the plate-like body 2 side is vibrated by sound pressure from below. When the noise includes a sound component having a specific frequency, the plate-like body 2 vibrates, and resonance tends to occur in the longitudinal direction or the lateral direction of the internal space 4. However, in the upper space of the internal space 4, the air particle movement is prevented by the filling member 14. Therefore, it is difficult to form a resonance mode when viewed in the entire internal space 4, and resonance is suppressed. As a result, since the excitation force of the upper plate-like body 3 serving as the radiation surface is reduced, the amplitude of the radiation surface is reduced, and the drop in sound transmission loss can be reduced.

上記充填部材１４の素材としては、グラスウールやフェルト等のほか、例えばポリウレタンや、発泡材を用いることができる。特に、発泡スチロールや発泡ウレタン等の独立気泡の発泡体を用いると、空気の粒子運動を効果的に低減でき、また、軽量かつ低コストとできる。   As a material of the filling member 14, for example, polyurethane or foam can be used in addition to glass wool and felt. In particular, when a closed cell foam such as polystyrene foam or urethane foam is used, the particle motion of air can be effectively reduced, and the weight and cost can be reduced.

図８には実施例２−２が示され、この構成は、実施例１−２（図２）と実施例２−１（図７）とを組み合わせたものに相当する。即ち、内部空間４の上側一部領域に充填部材１４が敷き詰められるようにして設置され、その内部に埋め込むようにして、直交状に組み合わせた仕切板１３・１３が設けられている。この構成では、仕切板１３による共鳴周波数の変更作用と、充填部材１４による空気の粒子運動減衰作用とがあいまって、音響透過損失の落込みをより良好に抑制できる。   FIG. 8 shows an embodiment 2-2, and this configuration corresponds to a combination of the embodiment 1-2 (FIG. 2) and the embodiment 2-1 (FIG. 7). That is, the filling members 14 are installed so as to be laid down in a partial region on the upper side of the internal space 4, and the partition plates 13 and 13 that are orthogonally combined are provided so as to be embedded therein. In this configuration, the resonance frequency changing action by the partition plate 13 and the air particle motion attenuating action by the filling member 14 are combined, so that a drop in sound transmission loss can be suppressed better.

この実施例２−２においても、充填部材１４の素材としては、グラスウールやフェルト等のほか、例えばポリウレタンや、発泡材を用いることができる。また、発泡スチロールや発泡ウレタン等の独立気泡の発泡体を用いると、空気の粒子運動を効果的に低減でき、また、軽量かつ低コストとできる。   Also in Example 2-2, as a material of the filling member 14, for example, polyurethane or foam can be used in addition to glass wool and felt. In addition, when a closed cell foam such as polystyrene foam or urethane foam is used, the particle motion of air can be effectively reduced, and the weight and cost can be reduced.

上記の実施形態の有効性を確かめるために、以下のような実験を行った。即ち、実施例１−１〜１−３、２−１のそれぞれの構造の二重壁構造体１を、音源室、受音室からなる残響室における両室の間の位置に設置し、ＪＩＳ Ａ１４１６に基づいて二重壁構造体１の片側から適宜の騒音を発生させ、二重壁構造体１を挟んだ両側で騒音計を用いて音圧を計測して、音響透過損失を求めた。   In order to confirm the effectiveness of the above embodiment, the following experiment was performed. That is, the double wall structure 1 having the structure of each of Examples 1-1 to 1-3 and 2-1 is installed at a position between both chambers in a reverberation chamber including a sound source chamber and a sound receiving chamber. An appropriate noise was generated from one side of the double wall structure 1 based on A1416, and sound pressure was measured by using a sound level meter on both sides of the double wall structure 1 to obtain sound transmission loss.

この結果を図１０、図１１に示す。なお図１０、図１１のグラフのそれぞれには、従来例の構造（図９）について同様の実験を行った結果も併せて示してある。図１０のグラフに示すように、従来例においては３１５Ｈｚ付近の周波数領域において音響透過損失に落ち込みがみられ、この部分で共鳴が生じていると推測される。一方、実施例１−１〜１−３の構成においては、前記仕切板１３による共鳴モード抑制のため、３１５Ｈｚ付近の領域においても音響透過損失の落込みが改善されており、遮音性能を向上できていることが判る。また図１１に示すように、実施例２−１の構成においても同様に、充填部材１４による共鳴モード抑制のため、３１５Ｈｚ付近の領域において音響透過損失の落込みがほぼ解消されており、遮音性能を向上できていることが判る。   The results are shown in FIGS. Each of the graphs of FIGS. 10 and 11 also shows the result of a similar experiment performed on the structure of the conventional example (FIG. 9). As shown in the graph of FIG. 10, in the conventional example, there is a drop in sound transmission loss in the frequency region near 315 Hz, and it is estimated that resonance occurs in this portion. On the other hand, in the configurations of Examples 1-1 to 1-3, since the resonance mode is suppressed by the partition plate 13, the drop in sound transmission loss is improved even in the region near 315 Hz, and the sound insulation performance can be improved. You can see that Also, as shown in FIG. 11, in the configuration of Example 2-1, the resonance mode is suppressed by the filling member 14, so that the drop in sound transmission loss is substantially eliminated in the region near 315 Hz, and the sound insulation performance It can be seen that

以上に本発明の好適な実施形態を示したが、本発明の技術的範囲は以上の実施形態に限定されるものではなく、様々に変形して実施することができる。   The preferred embodiments of the present invention have been described above, but the technical scope of the present invention is not limited to the above embodiments, and various modifications can be made.

例えば本発明の二重壁構造体は、乗用車のドアのみならず、例えばフード、トランクリッドに適用することができる。また、板状体２，３の形状については、上記のような長方形とすることに限らず、必要とされる部品の形状に応じて種々変更され得ることは言うまでもない。   For example, the double wall structure of the present invention can be applied not only to passenger car doors but also to hoods and trunk lids, for example. Further, the shape of the plate-like bodies 2 and 3 is not limited to the rectangular shape as described above, and it goes without saying that various changes can be made according to the shape of the required component.

また、音響透過損失の落込みの原因となる音圧モードの方向や次数は、二重壁構造体１の形状や騒音源との位置関係などの様々な事情により異なるので、仕切板１３の向きや枚数はそれらを考慮して任意に定めて良く、必ずしも２枚の仕切板１３・１３を直交させる構成に限らない。即ち、仕切板１３をどこに幾つ設けるかについては、想定される騒音による二重壁構造体１の内部空間４内の共鳴モードを考慮して、最適な位置と個数を決定すれば良い。   Further, the direction and order of the sound pressure mode causing the drop in sound transmission loss vary depending on various circumstances such as the shape of the double wall structure 1 and the positional relationship with the noise source. The number of sheets may be arbitrarily determined in consideration of them, and is not necessarily limited to the configuration in which the two partition plates 13 and 13 are orthogonal to each other. That is, as to where and how many partition plates 13 are provided, the optimum position and number may be determined in consideration of the resonance mode in the internal space 4 of the double wall structure 1 due to assumed noise.

前記仕切板１３は、板状体２，３のうち何れか一方又は両方に一体形成することも可能である。例えば、板状体２，３及び仕切板１３を何れも樹脂で構成し、射出成形等によって、仕切板１３と板状体２，３とを一体化した構造とすることもできる。   The partition plate 13 can be integrally formed on one or both of the plate-like bodies 2 and 3. For example, the plate-like bodies 2 and 3 and the partition plate 13 may be made of resin, and the partition plate 13 and the plate-like bodies 2 and 3 may be integrated by injection molding or the like.

前記充填部材１４の設置位置は、実施例２−１や２−２のように内部空間４の上側一部に設けることに限らず、例えば下側一部に設けても良い。   The installation position of the filling member 14 is not limited to being provided in a part on the upper side of the internal space 4 as in Example 2-1 or 2-2, and may be provided in a part on the lower side, for example.

本発明の二重壁構造体の実施例１−１の斜視図。The perspective view of Example 1-1 of the double wall structure of this invention. 実施例１−２の斜視図。The perspective view of Example 1-2. 実施例１−３の斜視図。The perspective view of Example 1-3. 実施例１−４の斜視図。The perspective view of Example 1-4. 実施例１−５の斜視図。The perspective view of Example 1-5. 実施例１−６の斜視図。The perspective view of Example 1-6. 実施例２−１の斜視図。The perspective view of Example 2-1. 実施例２−２の斜視図。The perspective view of Example 2-2. 従来例の二重壁構造体の構成を示す斜視図。The perspective view which shows the structure of the double wall structure of a prior art example. 実施例１−１〜１−３の音響透過抑制効果を従来例と比較して示すグラフ図。The graph which shows the sound transmission suppression effect of Examples 1-1 to 1-3 compared with a prior art example. 実施例２−１の音響透過抑制効果を従来例と比較して示すグラフ図。The graph which shows the sound transmission suppression effect of Example 2-1 compared with a prior art example.

符号の説明Explanation of symbols

１ 二重壁構造体
２ 加振側の板状体
３ 板状体
４ 内部空間
１２ 固定部材（仕切り）
１３・１３ 仕切板（仕切り）
１４ 充填部材
DESCRIPTION OF SYMBOLS 1 Double wall structure 2 Excitation side plate-like body 3 Plate-like body 4 Internal space 12 Fixing member (partition)
13.13 Partition plate (partition)
14 Filling member

Claims (3)

相対する板状体の間に内部空間が形成されるとともに当該内部空間が閉鎖されている二重壁構造体において、前記相対する板状体の間に、前記内部空間における空気の粒子運動を妨げる仕切りが設けられており、
前記仕切りは前記板状体が相対する方向の一部に設けられ、当該相対する方向の中央部分を仕切り、かつ、当該相対する方向から見て、前記内部空間の端まで設けられていることを特徴とする二重壁構造体。 In a double wall structure in which an internal space is formed between opposed plate-like bodies and the internal space is closed, air particle movement in the internal space is prevented between the opposed plate-like bodies. There is a partition ,
The partition is provided in a part of a direction in which the plate-like bodies are opposed to each other , partitions a central portion in the opposite direction, and is provided to an end of the internal space when viewed from the opposite direction. Characteristic double wall structure. 請求項１に記載の二重壁構造体であって、前記板状体が相対する方向から見て、前記仕切りは交差して設けられていることを特徴とする二重壁構造体。 2. The double wall structure according to claim 1 , wherein the partitions are provided so as to intersect each other when viewed from a direction in which the plate-like bodies face each other. 請求項１又は２に記載の二重壁構造体であって、前記仕切りは、前記板状体が相対する方向から見て、前記内部空間の長手方向および短手方向に沿うように設けられていることを特徴とする二重壁構造体。 A double-wall structure according to claim 1 or 2, wherein the partition, said plate-like body is viewed from the opposite direction, set along the longitudinal direction and the lateral direction of the inner space vignetting A double wall structure characterized in that
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