JP2009007885A - Quake-resistant sound insulating wall structure - Google Patents

Quake-resistant sound insulating wall structure Download PDF

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JP2009007885A
JP2009007885A JP2007172111A JP2007172111A JP2009007885A JP 2009007885 A JP2009007885 A JP 2009007885A JP 2007172111 A JP2007172111 A JP 2007172111A JP 2007172111 A JP2007172111 A JP 2007172111A JP 2009007885 A JP2009007885 A JP 2009007885A
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parallel
steel plate
plate material
parallel portion
sound insulation
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JP5026870B2 (en
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Toshiyuki Okano
利行 岡野
Toyohiro Matsuo
豊広 松尾
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Takenaka Komuten Co Ltd
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Takenaka Komuten Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a quake-resistant sound insulating wall structure wherein the sound insulating wall improves in a sound insulating performance by reducing a resonance phenomenon of a low-tone sound and is excellent in earthquake protection. <P>SOLUTION: A steel plate 10 and a plaster board 20 stand on an installation surface without touching to each other as well as almost in parallel to each other. As for the steel plate 10, an almost horizontal folding line 11 is formed in the steel plate by bending the steel plate 10, so that a first parallel part 12 as well as a second parallel part 13 which are almost parallel to the plaster board 20 and a non-parallel part 14 which is almost non-parallel to the plaster board 20 are alternately formed in a vertical direction. The distances between the first parallel part 12 and the plaster board 20 and also between the second parallel part 13 and the plaster board 20 are arranged in such a way that a frequency of a structural resonance produced therebetween is below a target frequency which is set smaller than a lower limit within a frequency range for the sound-insulating performance evaluation object frequency. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、各種建造物の外壁又は内壁を構成する遮音壁の構造であって、特に耐震性を有する遮音壁構造に関する。   The present invention relates to a sound insulation wall structure constituting an outer wall or an inner wall of various buildings, and particularly relates to a sound insulation wall structure having earthquake resistance.

従来から、各種建造物の外壁又は内壁には、遮音性能を高めた遮音壁が設けられている。この遮音壁の一例として、合板等にて構成された支持材と、この支持材の内側に配置された石膏ボードの如き内装材とを、相互に中空層を隔てて平行に立設することによって構成された二重壁構造がある（例えば特許文献１参照）。この二重壁構造においては、支持材と内装材の各々の質量に応じて音エネルギーが吸収されるので、当該二重壁構造の一側方から他側方への音の伝播が効果的に防止される。   Conventionally, sound insulation walls with improved sound insulation performance have been provided on the outer or inner walls of various buildings. As an example of this sound insulation wall, a support material composed of plywood or the like and an interior material such as a gypsum board disposed inside the support material are arranged in parallel with a hollow layer therebetween. There is a double wall structure (see, for example, Patent Document 1). In this double wall structure, sound energy is absorbed according to the mass of each of the support material and the interior material, so that sound propagation from one side of the double wall structure to the other side is effective. Is prevented.

特開２００２−００４４６７号公報JP 2002-004467 A

しかしながら、実際には、高音域におけるコインシデンス効果や、低音域において中空層がバネとして両部材を共振させてしまう構造共振現象によって、二重壁構造の遮音性能が低下してしまうことが知られている。特に、低音域においては、近年多用されるようになった乾式工法による対処が困難で、部屋の使用者に不快感を生じさせる可能性があることから、これを低減することが要望されていた。   However, in reality, it is known that the sound insulation performance of the double wall structure is lowered by the coincidence effect in the high sound range and the structural resonance phenomenon in which the hollow layer resonates as a spring in the low sound range. Yes. In particular, in the low sound range, it is difficult to deal with the dry method that has been used frequently in recent years, and it may cause discomfort to the user of the room, so it has been desired to reduce this. .

この低音域の共振現象を低減又は防止するためには、支持材と内装材との相互に設けた空気層の間隔を単に大きくすればよいとも考えられる。しかしながら、この相互間隔を単に大きくした場合には、壁構造全体が厚くなって好ましくないと共に、中空層が厚くなり過ぎることによって耐震性が低下するという問題が生じ得る。   In order to reduce or prevent the resonance phenomenon in the low sound range, it is considered that the interval between the air layers provided between the support material and the interior material may be simply increased. However, when the mutual distance is simply increased, the entire wall structure becomes thick, which is not preferable, and the problem that the earthquake resistance is deteriorated due to the hollow layer becoming too thick may arise.

この発明は、上述した従来技術の課題を解決するためになされたものであり、低音域の構造共振現象を低減することにより遮音性を向上させた遮音壁であり、さらに遮音性能を向上した結果として耐震性能にも優れた、耐震性を有する遮音壁構造を提供することを目的とする。   The present invention has been made to solve the above-described problems of the prior art, and is a sound insulation wall with improved sound insulation performance by reducing the structural resonance phenomenon in the low sound range, and as a result of further improving the sound insulation performance. An object of the present invention is to provide a sound insulation wall structure having excellent earthquake resistance and having earthquake resistance.

上述した課題を解決し、目的を達成するため、請求項１に係る発明は、鋼板と板材とを、相互に非接触状かつ略平行になるように設置面に立設し、前記鋼板には、当該鋼板を折り曲げて略水平の折り筋を形成することにより、前記板材に対して略平行な平行部と前記板材に対して略非平行な非平行部とを上下方向に交互に形成し、前記平行部と前記板材との相互の間隔を、これら平行部と板材との相互間に生じる構造共振の周波数が、遮音性能評価対象周波数範囲の下限値より小さくなるように設定された目標周波数を下回る間隔としたこと、を特徴とする。   In order to solve the above-described problems and achieve the object, the invention according to claim 1 is characterized in that the steel plate and the plate material are erected on the installation surface so as to be non-contact and substantially parallel to each other. By bending the steel plate to form a substantially horizontal crease, a parallel portion substantially parallel to the plate material and a non-parallel portion substantially non-parallel to the plate material are alternately formed in the vertical direction, The interval between the parallel part and the plate material is set to a target frequency set so that the frequency of the structural resonance generated between the parallel part and the plate material is smaller than the lower limit value of the sound insulation performance evaluation target frequency range. It is characterized by the fact that it is set to be less than the interval.

請求項２に係る発明は、請求項１に係る発明において、前記目標周波数として、第１目標周波数と、当該第１目標周波数よりも小さくなるように設定された第２目標周波数とが設定され、前記平行部として、前記板材に対して略平行な第１平行部と、前記板材に略平行であって当該板材に対して前記第１平行部よりも遠方に配置される第２平行部とを形成し、前記第１平行部と前記板材との相互の間隔を、これら第１平行部と板材との相互間に生じる構造共振の周波数が前記第１目標周波数を下回る間隔とし、前記第２平行部と前記板材との相互の間隔を、これら第２平行部と板材との相互間に生じる構造共振の周波数が前記第２目標周波数を下回る間隔としたこと、を特徴とする。   In the invention according to claim 2, in the invention according to claim 1, a first target frequency and a second target frequency set to be lower than the first target frequency are set as the target frequency, As the parallel portion, a first parallel portion that is substantially parallel to the plate material, and a second parallel portion that is substantially parallel to the plate material and disposed farther than the first parallel portion with respect to the plate material. And the interval between the first parallel portion and the plate material is set to an interval where the frequency of structural resonance generated between the first parallel portion and the plate material is lower than the first target frequency, and the second parallel portion. The interval between the plate portion and the plate material is set such that the frequency of the structural resonance generated between the second parallel portion and the plate material is lower than the second target frequency.

請求項３に係る発明は、前記板材を、前記鋼板の両側方において、当該鋼板に対して非接触状かつ略平行になるように設置面に立設し、前記両側方に配置された前記板材の各々と、前記鋼板の平行部との相互の間隔を、前記請求項１又は２に記載の間隔としたこと、を特徴とする耐震性を有する。   According to a third aspect of the present invention, the plate material is erected on an installation surface so as to be non-contact and substantially parallel to the steel plate on both sides of the steel plate, and the plate material disposed on the both sides. And the parallel part of the steel sheet is set to the distance described in claim 1 or 2, and has earthquake resistance.

請求項４に係る発明は、請求項２に係る発明において、前記第１平行部の前記板材に対する投影面積を、前記第２平行部の前記板材に対する投影面積と前記非平行部の前記板材に対する投影面積との和より小さくしたこと、を特徴とする。   The invention according to claim 4 is the invention according to claim 2, wherein the projection area of the first parallel portion on the plate material is the projection area of the second parallel portion on the plate material and the projection of the non-parallel portion on the plate material. It is characterized by being smaller than the sum of the area.

請求項５に係る発明は、請求項１から４のいずれか一項に係る発明において、前記鋼板と前記板材との相互間に、これら鋼板と板材との少なくとも一方に対して非接触になるように吸音手段を配置したこと、を特徴とする。   The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the steel sheet and the plate material are not in contact with each other with respect to at least one of the steel plate and the plate material. The sound absorbing means is arranged in the above.

請求項１に係る発明によれば、鋼板と板材とによる二重壁構造の遮音性能を、同じ面密度の単層壁の遮音性能と同等以上にすることができるので、遮音性能の高い壁構造を構築することができる。また、遮音性能を向上させる観点から鋼板を折り曲げることによって非平行部と平行部を有する複数の折り筋を形成した結果、当該鋼板を波形鋼板として構成することになり、結果として、高い耐震性を持たせることができる。   According to the first aspect of the present invention, the sound insulation performance of the double wall structure made of the steel plate and the plate material can be equal to or better than the sound insulation performance of the single-layer wall having the same surface density. Can be built. Moreover, as a result of forming a plurality of creases having non-parallel parts and parallel parts by bending the steel sheet from the viewpoint of improving the sound insulation performance, the steel sheet is configured as a corrugated steel sheet, resulting in high earthquake resistance. You can have it.

請求項２に係る発明によれば、構造共振を生じ易い平行部を複数に分割して、板材に近い方の第１平行部については第１目標周波数を下回る間隔で配置することで目標とする遮音性能を確保し、板材から遠い方の第２平行部については第１目標周波数より小さい第２目標周波数を下回る間隔で配置することで一層高い遮音性能を確保することで、全体として極めて遮音性能の高い壁構造を構築することができる。   According to the second aspect of the invention, the parallel part that is likely to cause structural resonance is divided into a plurality of parts, and the first parallel part that is closer to the plate material is disposed at an interval lower than the first target frequency. Sound insulation performance is ensured. By placing the second parallel part far from the plate material at an interval lower than the second target frequency, which is smaller than the first target frequency, a higher sound insulation performance is ensured. High wall structure can be constructed.

請求項３に係る発明によれば、鋼板の両側方に板材を配置した壁構造においても、各板材と鋼板との相互の遮音性能を請求項１や請求項２に係る発明と同様に高めることができ、全体として極めて遮音性能の高い壁構造を構築することができる。   According to the invention according to claim 3, even in the wall structure in which the plate material is arranged on both sides of the steel plate, the mutual sound insulation performance between the plate material and the steel plate is enhanced similarly to the inventions according to claim 1 and claim 2. As a whole, it is possible to construct a wall structure with extremely high sound insulation performance.

請求項４に係る発明によれば、第１平行部による構造共振の割合を低減することができ、遮音性能を一層向上させることができる。   According to the invention which concerns on Claim 4, the ratio of the structural resonance by a 1st parallel part can be reduced, and sound insulation performance can be improved further.

請求項５に係る発明によれば、鋼板と板材との間を伝播する音エネルギーを吸音手段によって吸収でき、遮音壁の遮音性能を一層向上させることができる。   According to the invention which concerns on Claim 5, the sound energy which propagates between a steel plate and a board | plate material can be absorbed by a sound absorption means, and the sound insulation performance of a sound insulation wall can be improved further.

以下に添付図面を参照して、この発明の各実施の形態を詳細に説明する。まず、〔I〕各実施の形態に共通の基本的概念を説明した後、〔II〕各実施の形態の具体的内容について説明し、〔III〕最後に、各実施の形態に対する変形例について説明する。ただし、これら各実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, [I] the basic concept common to each embodiment was explained, then [II] the specific contents of each embodiment were explained, and [III] finally, a modification to each embodiment was explained. To do. However, the present invention is not limited by these embodiments.

〔I〕各実施の形態に共通の基本的概念
まず、各実施の形態に共通の基本的概念について説明する。各実施の形態に係る耐震性を有する遮音壁構造は、任意の建造物の各階における外壁や内壁として適用可能な構造であり、概略的には、鋼板と板材とを、相互に非接触状かつ略平行になるように設置面に立設して構成されている（各実施の形態において鋼板の設置方向を表現する場合には、鋼板全体を１枚の板状部材と見た場合の方向を表現しており、後述する非平行部や平行部の如き鋼板の各部分を個別的に見た場合の方向の表現とは異なる）。このように鋼板を支持材として用いることで、壁構造の剛性を高め、基本的な耐震性を確保している。 [I] Basic concept common to the embodiments First, the basic concept common to the embodiments will be described. The sound insulation wall structure having earthquake resistance according to each embodiment is a structure that can be applied as an outer wall or an inner wall in each floor of an arbitrary building. In general, a steel plate and a plate material are non-contact and substantially non-contact with each other. It is configured to stand upright on the installation surface so as to be parallel (in each embodiment, when expressing the installation direction of the steel plate, the direction when the entire steel plate is viewed as one plate-like member is expressed. This is different from the expression of the direction when each part of the steel plate such as a non-parallel part and a parallel part to be described later is viewed individually). By using a steel plate as a support material in this way, the rigidity of the wall structure is increased and basic earthquake resistance is ensured.

各実施の形態に係る遮音壁構造の特徴の一つは、鋼板が、板材に対して略平行な平行部と、板材に対して略非平行な非平行部とを上下方向に交互に形成して構成されており、これら平行部と板材との相互の間隔を、これら平行部と板材との相互間に生じる構造共振の周波数が、遮音性能評価対象周波数範囲の下限値より小さくなるように設定された目標周波数を下回る間隔としたことにある。すなわち、１）鋼板を単なる扁平の板状材として形成するのではなく、平行部と非平行部とによって構成することで、少なくとも非平行部と板材との間の共振現象を回避でき、さらに、２）構造共振を生じさせ得る平行部については、板材との相互間隔を一定以上とすることで、低音域の遮音性能を高めている。すなわち、非平行部による共振回避機能と、平行部による共振低減機能とを組合せることで、遮音壁全体の遮音性能を高めている。   One of the characteristics of the sound insulation wall structure according to each embodiment is that the steel plate is formed by alternately forming parallel portions substantially parallel to the plate material and non-parallel portions substantially non-parallel to the plate material in the vertical direction. The interval between the parallel portions and the plate material is set so that the frequency of the structural resonance that occurs between the parallel portions and the plate material is smaller than the lower limit value of the frequency range subject to sound insulation performance evaluation. The interval is less than the target frequency. That is, 1) It is possible to avoid at least a resonance phenomenon between the non-parallel portion and the plate material by forming the steel plate by a parallel portion and a non-parallel portion, rather than simply forming a flat plate-like material, 2) About the parallel part which can produce a structural resonance, the sound insulation performance of a low-pitched sound region is improved by making the mutual space | interval with a board | plate material more than fixed. That is, the sound insulation performance of the entire sound insulation wall is enhanced by combining the resonance avoidance function by the non-parallel part and the resonance reduction function by the parallel part.

また必要に応じて、平行部と板材とによる共振を一層低減するため、平行部を構造共振の周波数が異なる複数の部分に分割する。例えば、板材に比較的近い第１平行部と、板材から比較的遠い第２平行部との２つの平行部に分割し、第１平行部については、遮音性能評価対象周波数範囲の下限値より小さくなるように設定された第１目標周波数を下回る間隔で配置することで目標とする遮音性能を確保し、第２平行部については、第１目標周波数より小さい第２目標周波数を下回る間隔で配置することで一層高い遮音性能を確保する。   If necessary, in order to further reduce the resonance caused by the parallel portion and the plate material, the parallel portion is divided into a plurality of portions having different structural resonance frequencies. For example, it is divided into two parallel parts, a first parallel part that is relatively close to the plate material and a second parallel part that is relatively far from the plate material, and the first parallel part is smaller than the lower limit value of the frequency range subject to sound insulation performance evaluation. The target sound insulation performance is ensured by arranging at intervals lower than the first target frequency set to be, and the second parallel portion is arranged at intervals lower than the second target frequency smaller than the first target frequency. This ensures higher sound insulation performance.

このように、非平行部や複数の平行部を形成するためには、板材を「折り曲げる」ことで折り筋を形成する。この結果、鋼板が、いわゆる波形鋼板と同様の特性を機能を備えることになり、耐震性についても向上させることができる。   Thus, in order to form a non-parallel part or a plurality of parallel parts, a folding line is formed by “folding” the plate material. As a result, the steel sheet has functions similar to those of the so-called corrugated steel sheet, and the earthquake resistance can be improved.

〔II〕各実施の形態の具体的内容
次に、本発明に係る耐震性を有する遮音壁構造の各実施の形態の具体的内容について説明する。 [II] Specific Contents of Each Embodiment Next, specific contents of each embodiment of the soundproof wall structure having earthquake resistance according to the present invention will be described.

〔実施の形態１〕
まず、本発明の実施の形態１について説明する。この形態は、平行部として第１平行部及び第２平行部を備えた鋼板を用いた形態である。 [Embodiment 1]
First, the first embodiment of the present invention will be described. This form is a form using the steel plate provided with the 1st parallel part and the 2nd parallel part as a parallel part.

（全体構成）
図１は本実施の形態１に係る遮音壁の正面図（鋼板側から見た図）、図２は図１の遮音壁の縦断面図、図３は図２の要部拡大図、図４は図３のＡ−Ａ矢視断面図である。図１、２に示すように、本実施の形態１に係る遮音壁１は、鋼板１０と石膏ボード２０とを備えた二重壁として構成されている。 (overall structure)
1 is a front view of the sound insulation wall according to the first embodiment (viewed from the steel plate side), FIG. 2 is a longitudinal sectional view of the sound insulation wall of FIG. 1, FIG. 3 is an enlarged view of the main part of FIG. 3 is a cross-sectional view taken along line AA in FIG. As shown in FIGS. 1 and 2, the sound insulation wall 1 according to the first embodiment is configured as a double wall including a steel plate 10 and a gypsum board 20.

（全体構成−鋼板）
鋼板１０は、全体として方形状に形成されており、鉛直方向に略沿う方向で設置面Ｇに立設されている。この鋼板１０の具体的な設置方法は任意であるが、例えば、鋼板１０の上下には略水平配置された平板（図示省略）が溶接されると共に、鋼板１０の左右には略鉛直配置された平板（図示省略）が溶接され、これら各平板には直交状に複数のスタッドボルト（図示省略）が溶接されている。そして、これら複数のスタッドボルトを内包するようにコンクリート枠を枠組し、この枠体にコンクリートを打設することにより、鋼板１０の周囲にコンクリート柱３０を設けると同時に、このコンクリート柱３０にスタッドボルトを埋設することで、このスタッドボルトを介して鋼板１０をコンクリート柱３０に緊結している。 (Overall structure-steel plate)
The steel plate 10 is formed in a square shape as a whole, and is erected on the installation surface G in a direction substantially along the vertical direction. Although the specific installation method of this steel plate 10 is arbitrary, for example, flat plates (not shown) arranged substantially horizontally are welded to the upper and lower sides of the steel plate 10 and arranged substantially vertically on the left and right sides of the steel plate 10. A flat plate (not shown) is welded, and a plurality of stud bolts (not shown) are welded orthogonally to each of the flat plates. A concrete frame is framed so as to enclose the plurality of stud bolts, and concrete is placed around the steel plate 10 by placing concrete on the frame, and at the same time, stud bolts are provided on the concrete column 30. The steel plate 10 is tightly coupled to the concrete pillar 30 through the stud bolt.

この鋼板１０は、平板状の原板をプレス機によって曲げ加工することで構成されたもので、図１に示すように、相互に略平行な複数の折り筋１１を備えており、各折り筋１１が略水平になるような向きで設置面Ｇに配置されている。この折り筋１１は、石膏ボード２０との配置関係によって３つに大別することができ、具体的には図３に示すように、石膏ボード２０に対して略平行な第１平行部１２、石膏ボード２０に対して略平行な部分であって第１平行部１２よりも石膏ボード２０に対して遠方に配置される第２平行部１３、及び、石膏ボード２０に対して非平行な非平行部１４とに分けられる。非平行部１４は、この実施の形態１においては平板状に形成されており、第１平行部１２と第２平行部１３とを相互に斜行状に連接する。以下の説明では、第１平行部１２と石膏ボード２０との相互の間隔をＬ１、第２平行部１３と石膏ボード２０との相互の間隔をＬ２（＞Ｌ１）とする。ただし、これら各部と石膏ボード２０との位置関係の詳細については後述する。   This steel plate 10 is formed by bending a flat plate-shaped original plate with a press machine, and includes a plurality of crease lines 11 substantially parallel to each other as shown in FIG. Is arranged on the installation surface G in such a direction that is substantially horizontal. The folding line 11 can be roughly divided into three according to the arrangement relationship with the gypsum board 20, specifically, as shown in FIG. 3, a first parallel portion 12 substantially parallel to the gypsum board 20, The second parallel portion 13 that is substantially parallel to the gypsum board 20 and is located farther from the gypsum board 20 than the first parallel portion 12, and non-parallel to the gypsum board 20 It is divided into part 14. The non-parallel portion 14 is formed in a flat plate shape in the first embodiment, and connects the first parallel portion 12 and the second parallel portion 13 to each other in an oblique manner. In the following description, the interval between the first parallel portion 12 and the gypsum board 20 is L1, and the interval between the second parallel portion 13 and the gypsum board 20 is L2 (> L1). However, details of the positional relationship between these parts and the gypsum board 20 will be described later.

（全体構成−石膏ボード）
石膏ボード２０は、特許請求の範囲における板材に対応するもので、内装用の仕上げ材である。この石膏ボード２０は、例えば石膏の両面をボード用原紙で被覆して板状に成形して構成されており、図３に示すように、同一寸法の２枚の石膏ボード２０が相互に一体とされた状態で、鋼板１０に対して略平行な方向（鉛直方向に略沿う方向）で設置面に立設されている。この石膏ボード２０の具体的な固定方法は任意であるが、ここでは図３、４に示すように、鋼板１０と石膏ボード２０との相互間に複数のスタッド（リップミゾ形鋼）４０を所定間隔で鉛直方向に沿って所定方法で固定し、この複数のスタッド４０の側面に石膏ボード２０を当接させた状態で、当該スタッド４０に石膏ボード２０をビス４１にて固定している。 (Overall configuration-gypsum board)
The gypsum board 20 corresponds to the plate material in the claims, and is a finishing material for interior use. This gypsum board 20 is formed by, for example, covering both sides of gypsum with a base paper for board and forming it into a plate shape. As shown in FIG. 3, two gypsum boards 20 having the same dimensions are integrated with each other. In this state, it is erected on the installation surface in a direction substantially parallel to the steel plate 10 (a direction substantially along the vertical direction). Although the concrete fixing method of this gypsum board 20 is arbitrary, here, as shown in FIGS. 3 and 4, a plurality of studs (lip groove steel) 40 are provided at predetermined intervals between the steel plate 10 and the gypsum board 20. The gypsum board 20 is fixed to the stud 40 with screws 41 in a state where the gypsum board 20 is in contact with the side surfaces of the plurality of studs 40 along the vertical direction.

（鋼板と石膏ボードとの相互の配置関係）
次に、鋼板１０と石膏ボード２０との相互の配置関係について詳細に説明する。日本建築学会による遮音性能基準では、建築物の遮音性能を評価する尺度として遮音等級が決められており、この遮音等級の一種として、音響試験室で測定された遮音壁単体の遮音性能（音響透過損失）を示すＴＬＤ値が設定されている。このＴＬＤ値は、中心周波数１２５Ｈｚ、２５０Ｈｚ、５００Ｈｚ、１，０００Ｈｚ、２，０００Ｈｚ、４，０００Ｈｚの６帯域における音響透過損失を測定し、この測定値を遮音基準曲線に当てはめることで決定される。従って、ＴＬＤ値による所望の遮音等級を得るためには、上記６帯域の各周波数を中心周波数とする１／１オクターブ帯域（具体的には９０Ｈｚ〜５，７６０Ｈｚの周波数範囲であり、特許請求の範囲における遮音性能評価対象周波数範囲に対応する）に対して、遮音性能評価上のメリットが得られるような二重壁構造を構築する必要がある。これら中心周波数及び遮音性能評価対象周波数範囲の相互関係等を図５に示す。 (Relationship between steel plate and gypsum board)
Next, the mutual arrangement | positioning relationship between the steel plate 10 and the gypsum board 20 is demonstrated in detail. In the sound insulation performance standards by the Architectural Institute of Japan, the sound insulation grade is determined as a scale for evaluating the sound insulation performance of buildings. ) are set TL D value indicating. This TL D value is determined by measuring sound transmission loss in six bands of center frequencies of 125 Hz, 250 Hz, 500 Hz, 1,000 Hz, 2,000 Hz, and 4,000 Hz, and applying this measurement value to a sound insulation reference curve. . Therefore, in order to obtain the desired sound insulation grade by TL D value, the 1/1 octave band (specifically having a center frequency of each frequency of the 6-band is a frequency range of 90Hz～5,760Hz, claims It is necessary to construct a double wall structure that can provide merit in sound insulation performance evaluation for the sound insulation performance evaluation target frequency range in the above range. FIG. 5 shows the correlation between the center frequency and the frequency range subject to sound insulation performance evaluation.

一般に、二重壁構造は、下記式（１）に示す共鳴透過周波数ｆｒ付近において著しい遮音性能（音響透過損失）の低下を生じることが知られている。その一方で、共鳴透過周波数ｆｒに比べて十分に高い周波数領域においては、同じ面密度（単位面積当たりの質量）の単層壁の遮音性能と同等以上の遮音性能を期待することができる。 In general, double wall construction is known to cause significant loss of sound insulation performance in the vicinity of the resonance transmission frequency f r of the following formula (1) (sound transmission loss). On the other hand, in a frequency range sufficiently higher than the resonant transmission frequency fr , it is possible to expect a sound insulation performance equal to or better than that of a single-layer wall having the same surface density (mass per unit area).

Figure 2009007885
Figure 2009007885

ここで、式（１）において、ｆｒは二重壁構造における共鳴透過周波数（Ｈｚ）、ｍ１及びｍ２は二重壁構造における各壁の面密度（ｋｇ／ｍ２）、ｄは二重壁構造の中空空気層の厚さ（ｍ）、ｃは空気中の音速（３４０ｍ／ｓ）、ρｃは空気の特性インピーダンス（４１５ｋｇ／ｍ２・ｓ）である。 Here, in Formula (1), fr is the resonant transmission frequency (Hz) in the double wall structure, m1 and m2 are the surface density (kg / m 2 ) of each wall in the double wall structure, and d is the double wall. The thickness (m) of the hollow air layer of the structure, c is the speed of sound in air (340 m / s), and ρc is the characteristic impedance of air (415 kg / m 2 · s).

二重壁構造の遮音性能を、同じ面密度の単層壁の遮音性能と同等以上とするためには、最低限、共鳴透過周波数ｆｒを、上述の遮音性能評価対象周波数範囲の下限値である９０Ｈｚを下回る値とすることが必要である。しかし実際には、図５の下方に示すように、共鳴透過周波数ｆｒのみならず、この共鳴透過周波数ｆｒの前後の近傍周波数範囲においても音響透過損失が低下する範囲が存在するので、遮音性能評価対象周波数範囲の下限値を共鳴透過周波数ｆｒの目標値（以下、目標周波数ｆｔ）としただけでは十分とは言えない。このため、本実施の形態１においては、目標周波数ｆｔを遮音性能評価対象周波数範囲の下限値よりもさらに小さくなるように（少なくとも、目標周波数ｆｔが、音響透過損失の低下がほぼ無くなる周波数と共鳴透過周波数ｆｒとの相互の周波数間隔ｆｄだけ、遮音性能評価対象周波数範囲の下限値よりも小さくなるように）設定した上で、この目標周波数ｆｔを共鳴透過周波数ｆｒが下回るように、二重壁構造の中空空気層の厚さを決定する必要がある。 The sound insulation performance of double wall construction, for the same surface density of the single-wall sound insulation performance equal to or higher than the minimum, the resonance transmission frequency f r, at the lower limit of the sound insulation performance evaluated frequency range above It is necessary to set the value below a certain 90 Hz. However, in practice, as illustrated below in FIG. 5, not only the resonance transmission frequency f r, since sound transmission loss exists range drops near a frequency range around the resonance transmission frequency f r, sound insulation evaluation frequency range of interest a target value of the lower limit value a resonant transmission frequency f r (hereinafter, target frequency f t) only was is not sufficient. Therefore, in the first embodiment, as the target frequency f t becomes smaller than the lower limit value of the sound insulation performance evaluation target frequency range (at least, the target frequency f t is approximately no frequency reduction of sound transmission loss only the mutual frequency spacing f d of the resonant transmission frequency f r, the sound insulation performance evaluation to be smaller than the lower limit of the frequency range of interest) on the set, the target frequency f t a resonant transmission frequency f r is lower than Thus, it is necessary to determine the thickness of the hollow air layer having a double wall structure.

このように目標周波数ｆｔを設定する具体的方法として、本実施の形態１においては、遮音性能評価対象周波数範囲の下限値を１より大きい所定係数で除算し、この除算結果を目標周波数ｆｔとしている。ここで、具体的な所定係数としては、√２（ルート２）、２、又は３を用いる。√２は上述の周波数間隔ｆｄを算定するための係数、２又は３は二重壁構造の低音域における遮音性能を１又は２ランク高めるための係数である。具体的には、遮音性能評価対象周波数範囲の下限値である９０Ｈｚを√２、２、３でそれぞれ除算した値である約６３Ｈｚ、約４５Ｈｚ、約３０Ｈｚを目標周波数ｆｔとする。 As a specific method of setting such a target frequency f t, in the first embodiment, the lower limit of the sound insulation performance evaluated frequency range divided by 1 greater than a predetermined coefficient, the target frequency f t of the division result It is said. Here, √2 (route 2), 2 or 3 is used as a specific predetermined coefficient. √2 is a coefficient for calculating the frequency interval f d described above, and 2 or 3 is a coefficient for enhancing the sound insulation performance in the low sound range of the double wall structure by one or two ranks. Specifically, the sound insulation performance evaluation target frequency range between the lower limit value at which about a value obtained by dividing, respectively √2,2,3 a 90 Hz 63 Hz, about 45 Hz, about 30Hz and the target frequency f t.

このように目標周波数ｆｔを設定した場合において、鋼板１０と石膏ボード２０とによる構造共振の周波数が当該目標周波数ｆｔを下回るようにするために必要な鋼板１０と石膏ボード２０との相互の間隔は、以下のように算定することができる。すなわち、鋼板１０の面密度を２５．１ｋｇ／ｍ２（厚み３．２ｍｍで密度７８５０ｋｇ／ｍ３の鋼板１０の場合）、石膏ボード２０の面密度を２９．４ｋｇ／ｍ２（厚み２１ｍｍで密度７００ｋｇ／ｍ３の石膏ボード２０を２枚並設した場合）とすると、上記式（１）より、目標周波数ｆｔ＝６３Ｈｚとした場合にはｄ＝約６７ｍｍであるため「約７０ｍｍ以上」、目標周波数ｆｔ＝４５Ｈｚとした場合にはｄ＝約１３０ｍｍであるため「約１３５ｍｍ以上」、目標周波数ｆｔ＝３０Ｈｚとした場合にはｄ＝約２９４ｍｍであるため「約３００ｍｍ以上」とすればよいことが判る。 Thus, in case of setting the target frequency f t, the frequency of structural resonances by the steel sheet 10 and the gypsum board 20 is mutual with the steel plate 10 and the gypsum board 20 required to be below the target frequency f t The interval can be calculated as follows. That is, the surface density of the steel plate 10 is 25.1 kg / m 2 (in the case of the steel plate 10 having a thickness of 3.2 mm and a density of 7850 kg / m 3 ), and the surface density of the gypsum board 20 is 29.4 kg / m 2 (the density at a thickness of 21 mm). (When two gypsum boards 20 of 700 kg / m 3 are arranged side by side), from the above formula (1), when the target frequency f t = 63 Hz, d = about 67 mm, so “about 70 mm or more” When the target frequency f t = 45 Hz, d = about 130 mm, so “about 135 mm or more”, and when the target frequency f t = 30 Hz, d = about 294 mm, so “about 300 mm or more”. I know it ’s good.

ここで、本実施の形態１においては、鋼板１０の平行部を第１平行部１２と第２平行部１３とに分割しているため、第１平行部１２と石膏ボード２０との間隔Ｌ１を定めるための目標周波数ｆｔ（以下、「第１目標周波数ｆｔ１」）と、第２平行部１３と石膏ボード２０との間隔Ｌ２を定めるための目標周波数ｆｔ（以下、「第２目標周波数ｆｔ２」）とをそれぞれ設定する。ただし、間隔Ｌ２＞間隔Ｌ１であることから、第１目標周波数ｆｔ１＞第２目標周波数ｆｔ２とする。 Here, in this Embodiment 1, since the parallel part of the steel plate 10 is divided | segmented into the 1st parallel part 12 and the 2nd parallel part 13, the space | interval L1 of the 1st parallel part 12 and the gypsum board 20 is set. A target frequency f t (hereinafter referred to as “first target frequency f t1 ”) for determination and a target frequency f t (hereinafter referred to as “second target frequency” for determining the distance L2 between the second parallel portion 13 and the gypsum board 20). f t2 “)” is set. However, since interval L2> interval L1, first target frequency f t1 > second target frequency f t2 is satisfied .

具体的には、第１目標周波数ｆｔ１＝約６３Ｈｚ、第２目標周波数ｆｔ２＝約４５Ｈｚとする。この場合、上述の計算結果から、間隔Ｌ１＝約７０ｍｍ以上、間隔Ｌ２＝約１３５ｍｍ以上とすればよい。あるいは、第１目標周波数ｆｔ１＝約４５Ｈｚ、第２目標周波数ｆｔ２＝約３０Ｈｚとすることが遮音性能上はより好ましく、この場合、間隔Ｌ１＝約１３５ｍｍ以上、間隔Ｌ２＝約３００ｍｍ以上とすればよい。 Specifically, the first target frequency f t1 = about 63 Hz and the second target frequency f t2 = about 45 Hz. In this case, from the above calculation results, the interval L1 = about 70 mm or more and the interval L2 = about 135 mm or more may be used. Alternatively, the first target frequency f t1 = about 45 Hz and the second target frequency f t2 = about 30 Hz are more preferable in terms of sound insulation performance. In this case, the interval L1 = about 135 mm or more and the interval L2 = about 300 mm or more. That's fine.

なお、この実施の形態１においては、鋼板１０の左右一方にのみ石膏ボード２０を配置しているが、左右両側に石膏ボード２０を配置する場合については、石膏ボード２０の各々と鋼板１０とに対して、それぞれ上述の関係を適用すればよい。この変形例に係る遮音壁の拡大断面図（図３に対応する箇所における断面図）を図６に示す。この図６では、図示右側の石膏ボード２０に対する第１平行部１２、第２平行部１３、非平行部１４と、図示左側の石膏ボード２０に対する第１平行部１２’、第２平行部１３’、非平行部１４’とを示している。このように、第１平行部及び第２平行部は、石膏ボード２０からの距離に基づいて決定されるため、図示右側の石膏ボード２０を基準として決定された第１平行部及び第２平行部と、図示左側の石膏ボード２０を基準として決定された第１平行部及び第２平行部とは、相互に入れ替わることになる。そして、図示左側の石膏ボード２０と第１平行部１２’との相互の間隔Ｌ１’を、上述の間隔Ｌ１と同様に設定し、図示左側の石膏ボード２０と第２平行部１３’との相互の間隔Ｌ２’を、上述の間隔Ｌ２と同様に設定することができる。ここで、石膏ボード２０の各々を、鋼板１０とに対してそれぞれ異なる間隔で配置してもよく、例えば図６において、間隔Ｌ１を約７０ｍｍ以上とすると共に間隔Ｌ２を約１３５ｍｍ以上とし、間隔Ｌ１’を約１００ｍｍ以上とすると共に、間隔Ｌ２’を約２００ｍｍ以上としてもよい。特に、このように石膏ボード２０の各々を鋼板１０とに対してそれぞれ異なる間隔で配置した場合、一方の石膏ボード２０と鋼板１０との相互間の共振周波数と、他方の石膏ボード２０と鋼板１０との相互間の共振周波数とを、相互に異なる共振周波数とすることができるので、遮音壁１の全体の遮音性能を一層向上させることができる。なお、構造共振は鋼板１０と石膏ボード２０との間の空気層の厚みで決まるため、「間隔」とは、鋼板１０の表面と、当該表面に対向する石膏ボード２０の表面との相互の距離を意味するものとする。   In the first embodiment, the gypsum board 20 is disposed only on one of the left and right sides of the steel plate 10. However, when the gypsum board 20 is disposed on both the left and right sides, each of the gypsum board 20 and the steel plate 10 is provided. On the other hand, what is necessary is just to apply the above-mentioned relationship, respectively. FIG. 6 shows an enlarged cross-sectional view (cross-sectional view at a location corresponding to FIG. 3) of the sound insulating wall according to this modification. In FIG. 6, the first parallel portion 12, the second parallel portion 13, and the non-parallel portion 14 with respect to the gypsum board 20 on the right side of the drawing, and the first parallel portion 12 'and the second parallel portion 13' with respect to the gypsum board 20 on the left side of the drawing. , A non-parallel portion 14 '. Thus, since the 1st parallel part and the 2nd parallel part are determined based on the distance from the gypsum board 20, the 1st parallel part and the 2nd parallel part which were determined on the basis of the gypsum board 20 on the right side of the figure And the 1st parallel part and 2nd parallel part which were determined on the basis of the gypsum board 20 of the left side of illustration are interchanged. Then, a mutual interval L1 ′ between the left plaster board 20 and the first parallel portion 12 ′ is set in the same manner as the above-described interval L1, and the left plaster board 20 and the second parallel portion 13 ′ shown in FIG. The interval L2 ′ can be set in the same manner as the interval L2. Here, each of the gypsum boards 20 may be arranged at different intervals with respect to the steel plate 10. For example, in FIG. 6, the interval L1 is set to about 70 mm or more and the interval L2 is set to about 135 mm or more. 'May be about 100 mm or more, and the distance L2' may be about 200 mm or more. In particular, when each of the gypsum boards 20 is arranged at different intervals with respect to the steel plate 10, the resonance frequency between the one gypsum board 20 and the steel plate 10 and the other gypsum board 20 and the steel plate 10 are as follows. And the resonance frequency between them can be different from each other, so that the overall sound insulation performance of the sound insulation wall 1 can be further improved. Since structural resonance is determined by the thickness of the air layer between the steel plate 10 and the gypsum board 20, the "interval" is the mutual distance between the surface of the steel plate 10 and the surface of the gypsum board 20 facing the surface. Means.

（鋼板と石膏ボードとの相互の配置関係−非平行部）
なお、非平行部１４については、第１平行部１２や第２平行部１３と比べて石膏ボード２０との間における共振現象が生じ難いため、第１平行部１２や第２平行部１３のように石膏ボード２０との間隔を限定しなくても、遮音性能の向上に寄与している。さらに、非平行部１４と石膏ボード２０との相互の間隔としては、少なくとも間隔Ｌ１以上の間隔が確保できていることから、非平行部１４は第１平行部１２と同等以上の遮音性能を有する。 (Relationship between steel plate and gypsum board-non-parallel part)
The non-parallel portion 14 is less likely to cause a resonance phenomenon with the gypsum board 20 than the first parallel portion 12 and the second parallel portion 13, and thus, like the first parallel portion 12 and the second parallel portion 13. Even if the distance from the gypsum board 20 is not limited, it contributes to the improvement of the sound insulation performance. Furthermore, since the distance between the non-parallel portion 14 and the gypsum board 20 is at least the distance L1 or more, the non-parallel portion 14 has a sound insulation performance equal to or higher than that of the first parallel portion 12. .

（鋼板の各部の面積比について）
次に、第１平行部１２、第２平行部１３、及び、非平行部１４の面積の相互関係について説明する。図７には、石膏ボード２０側から見た鋼板１０の正面図を示す。上述のように、第２平行部１３と石膏ボード２０との相互の共振周波数は、第１平行部１２と石膏ボード２０との相互の共振周波数より低い。また、非平行部１４と石膏ボード２０との相互間には共振現象が生じ難い。従って、鋼板１０の全面積に対する第２平行部１３や非平行部１４の面積比を増加させる程、遮音性能を向上させることができる。そこで本実施の形態２においては、石膏ボード２０に対する（略鉛直面に対する）、第１平行部１２の投影面積をＡ１、第２平行部１３の投影面積をＡ２、非平行部１４の投影面積をＡ３とすると、投影面積Ａ１＜投影面積Ａ２＋投影面積Ａ３となるように、これら第１平行部１２、第２平行部１３、及び、非平行部１４の面積比を決定している。 (Regarding the area ratio of each part of the steel sheet)
Next, the mutual relationship of the areas of the first parallel portion 12, the second parallel portion 13, and the non-parallel portion 14 will be described. In FIG. 7, the front view of the steel plate 10 seen from the gypsum board 20 side is shown. As described above, the mutual resonance frequency of the second parallel portion 13 and the gypsum board 20 is lower than the mutual resonance frequency of the first parallel portion 12 and the gypsum board 20. In addition, a resonance phenomenon hardly occurs between the non-parallel portion 14 and the gypsum board 20. Therefore, the sound insulation performance can be improved as the area ratio of the second parallel portion 13 and the non-parallel portion 14 to the entire area of the steel plate 10 is increased. Therefore, in the second embodiment, the projected area of the first parallel portion 12 with respect to the gypsum board 20 (relative to the substantially vertical plane) is A1, the projected area of the second parallel portion 13 is A2, and the projected area of the non-parallel portion 14 is Assuming that A3, the area ratio of the first parallel portion 12, the second parallel portion 13, and the non-parallel portion 14 is determined so that the projection area A1 <projection area A2 + projection area A3.

（鋼板の耐震性について）
最後に、鋼板１０の耐震性について説明する。上述のように、遮音性能を向上させる観点から鋼板１０に複数の折り筋１１を形成した結果、当該鋼板１０はいわゆる波形鋼板として構成されることになる。この波形鋼板は、水平荷重に対する高い変形性能とエネルギー吸収能力を有すると共に、当該波形鋼板の周囲のコンクリート柱３０の変形を拘束しないので当該コンクリート柱３０がラーメン的に挙動することを許容し、高い耐震性を有する。従って、単に遮音性能に優れた壁構造を構築できるだけでなく、この壁構造に高い耐震性を持たせることができる。 (About the earthquake resistance of steel sheet)
Finally, the earthquake resistance of the steel plate 10 will be described. As described above, as a result of forming the plurality of folding lines 11 in the steel plate 10 from the viewpoint of improving the sound insulation performance, the steel plate 10 is configured as a so-called corrugated steel plate. This corrugated steel sheet has a high deformation performance and energy absorption capability with respect to a horizontal load, and does not restrain the deformation of the concrete column 30 around the corrugated steel sheet, thus allowing the concrete column 30 to behave like a ramen and is high. Has earthquake resistance. Therefore, it is possible not only to construct a wall structure having excellent sound insulation performance, but also to impart high earthquake resistance to this wall structure.

（実施の形態１の効果）
このような構成によれば、第１平行部１２と石膏ボード２０との相互の間隔Ｌ１を、これら相互間に生じる構造共振の周波数が、遮音性能評価対象周波数範囲の下限値より小さくなるように設定された第１目標周波数ｆｔ１を下回る間隔としたので、これら鋼板１０と石膏ボード２０とによる二重壁構造の遮音性能を、同じ面密度の単層壁の遮音性能と同等以上にすることができる。
また、第２平行部１３と石膏ボード２０との相互の間隔Ｌ２を、これら相互間に生じる構造共振の周波数が、第１目標周波数ｆｔ１より小さい第１目標周波数ｆｔ２を下回る間隔としたので、鋼板１０と石膏ボード２０とによる二重壁構造の遮音性能を、同じ面密度の単層壁の遮音性能に比べてさらに優位にすることができる。
また、第１平行部１２の石膏ボード２０に対する投影面積を、第２平行部１３の石膏ボード２０に対する投影面積と非平行部１４の石膏ボード２０に対する投影面積との和より小さくしたので、第１平行部１２による構造共振の影響を低減することで、遮音性能を一層向上させることができる。
さらに、遮音性能を向上させる観点から鋼板１０に複数の折り筋１１を形成した結果、当該鋼板１０を波形鋼板として構成することになり、結果として、高い耐震性を持たせることができる。 (Effect of Embodiment 1)
According to such a configuration, the interval L1 between the first parallel portion 12 and the gypsum board 20 is set such that the frequency of the structural resonance that occurs between them becomes smaller than the lower limit value of the frequency range for sound insulation performance evaluation. Since the interval is lower than the set first target frequency f t1 , the sound insulation performance of the double wall structure by the steel plate 10 and the gypsum board 20 should be equal to or greater than the sound insulation performance of the single-layer wall having the same surface density. Can do.
Moreover, since the mutual interval L2 between the second parallel portion 13 and the gypsum board 20 is set to an interval in which the frequency of the structural resonance generated between them is lower than the first target frequency ft2 which is smaller than the first target frequency ft1 . The sound insulation performance of the double wall structure by the steel plate 10 and the gypsum board 20 can be made further superior to the sound insulation performance of the single-layer wall having the same surface density.
In addition, since the projected area of the first parallel portion 12 on the gypsum board 20 is smaller than the sum of the projected area of the second parallel portion 13 on the gypsum board 20 and the projected area of the non-parallel portion 14 on the gypsum board 20, the first By reducing the influence of structural resonance caused by the parallel portion 12, the sound insulation performance can be further improved.
Furthermore, as a result of forming a plurality of folding lines 11 on the steel plate 10 from the viewpoint of improving the sound insulation performance, the steel plate 10 is configured as a corrugated steel plate, and as a result, high earthquake resistance can be provided.

〔実施の形態２〕
次に、本発明の実施の形態２について説明する。実施の形態２は、鋼板と石膏ボードとの相互間に吸音手段を配置した形態である。なお、実施の形態１と略同様の構成要素については、必要に応じて、実施の形態１で用いたのと同一の符号又は名称を付してその説明を省略する。 [Embodiment 2]
Next, a second embodiment of the present invention will be described. In the second embodiment, sound absorbing means is disposed between the steel plate and the gypsum board. In addition, about the component similar to Embodiment 1, the same code | symbol or name as used in Embodiment 1 is attached | subjected as needed, and the description is abbreviate | omitted.

図８は本実施の形態２に係る遮音壁の拡大断面図（図３に対応する箇所における断面図）である。この図８に示すように、本実施の形態２に係る遮音壁２は、鋼板１０と石膏ボード２０との相互間にグラスウール５０を配置して構成されている。このグラスウール５０は、鋼板１０と石膏ボード２０との間を伝播する音エネルギーを吸収するもので、特許請求の範囲における吸音手段に対応する。このグラスウール５０は、例えば密度が２４〜３２Ｋｇ／ｍ３程度のものであり、石膏ボード２０に対応する全領域に設けられている。このグラスウール５０の固定方法は任意であるが、例えば、鋼板１０と石膏ボード２０との相互間に配置された複数のスタッド４０の相互間に配置されて、これらスタッド４０や石膏ボード２０に対してビス止めされている。 FIG. 8 is an enlarged cross-sectional view (cross-sectional view at a location corresponding to FIG. 3) of the sound insulating wall according to the second embodiment. As shown in FIG. 8, the sound insulation wall 2 according to the second embodiment is configured by arranging glass wool 50 between a steel plate 10 and a gypsum board 20. The glass wool 50 absorbs sound energy propagating between the steel plate 10 and the gypsum board 20, and corresponds to sound absorbing means in the claims. The glass wool 50 has, for example, a density of about 24 to 32 kg / m 3 and is provided in the entire region corresponding to the gypsum board 20. The glass wool 50 may be fixed by any method. For example, the glass wool 50 may be disposed between a plurality of studs 40 disposed between the steel plate 10 and the gypsum board 20, and the stud 40 and the gypsum board 20 may be fixed to each other. Screwed.

ここで、グラスウール５０は、鋼板１０と石膏ボード２０との両方に同時に接触することがないよう、少なくとも鋼板１０と石膏ボード２０とのいずれか一方に対して空間を隔てて配置されることが好ましい。例えば、第１平行部１２と石膏ボード２０との間隔Ｌ１を約７０ｍｍとした場合、グラスウール５０の厚みＬ３は約５０ｍｍとする。このことにより、鋼板１０と石膏ボード２０との共振がグラスウール５０によって増幅されることが防止されている。ただし、グラスウール５０の如き柔らかい吸音材については鋼板１０と石膏ボード２０との両方に同時に接触させた場合であっても遮音性能を劣化させる原因にならないこともあり得るので、この場合には、これら鋼板１０と石膏ボード２０との相互間に、空間を隔てることなくグラスウール５０を充填してもよい。   Here, it is preferable that the glass wool 50 is disposed with a space between at least one of the steel plate 10 and the gypsum board 20 so as not to contact both the steel plate 10 and the gypsum board 20 at the same time. . For example, when the distance L1 between the first parallel part 12 and the gypsum board 20 is about 70 mm, the thickness L3 of the glass wool 50 is about 50 mm. This prevents the resonance between the steel plate 10 and the gypsum board 20 from being amplified by the glass wool 50. However, a soft sound-absorbing material such as glass wool 50 may not cause deterioration in sound insulation performance even if it is in contact with both the steel plate 10 and the gypsum board 20 at the same time. Glass wool 50 may be filled between the steel plate 10 and the gypsum board 20 without separating a space.

（実施の形態２の効果）
このような構成によれば、鋼板１０と石膏ボード２０との相互間にグラスウール５０を設けたので、鋼板１０と石膏ボード２０との間を伝播する音エネルギーをグラスウール５０によって吸収でき、遮音壁２の遮音性能を一層向上させることができる。 (Effect of Embodiment 2)
According to such a configuration, since the glass wool 50 is provided between the steel plate 10 and the gypsum board 20, the sound energy propagating between the steel plate 10 and the gypsum board 20 can be absorbed by the glass wool 50, and the sound insulation wall 2. Sound insulation performance can be further improved.

〔実施の形態３〕
次に、本発明の実施の形態３について説明する。実施の形態３は、平行部を一つしか持たない鋼板を備えた形態である。なお、実施の形態１と略同様の構成要素については、必要に応じて、実施の形態１で用いたのと同一の符号又は名称を付してその説明を省略する。 [Embodiment 3]
Next, a third embodiment of the present invention will be described. Embodiment 3 is a form provided with a steel plate having only one parallel part. In addition, about the component similar to Embodiment 1, the same code | symbol or name as used in Embodiment 1 is attached | subjected as needed, and the description is abbreviate | omitted.

図９は本実施の形態３に係る遮音壁の拡大断面図（図３に対応する箇所における断面図）である。この図９に示すように、本実施の形態３に係る遮音壁３は、実施の形態１とは異なる断面形状の鋼板６０を備えて構成されている。この鋼板６０に形成された略水平の折り筋６１は、石膏ボード２０に対して略平行な平行部６２と、石膏ボード２０に対して非平行な非平行部６３とに分けられる。   FIG. 9 is an enlarged cross-sectional view (cross-sectional view at a location corresponding to FIG. 3) of the sound insulating wall according to the third embodiment. As shown in FIG. 9, the sound insulation wall 3 according to the third embodiment includes a steel plate 60 having a cross-sectional shape different from that of the first embodiment. The substantially horizontal folding line 61 formed on the steel plate 60 is divided into a parallel part 62 substantially parallel to the gypsum board 20 and a non-parallel part 63 non-parallel to the gypsum board 20.

このように平行部６２を１つしか持たない鋼板６０を用いる場合、当該平行部６２と石膏ボード２０との相互の間隔Ｌ２を、実施の形態１の間隔Ｌ１と同様に設定することで、高い遮音性能を得ることができる。さらに可能であれば、この間隔Ｌ２を、実施の形態１の間隔Ｌ２と同様に設定することで、さらに優れた遮音性能を得ることができる。   Thus, when using the steel plate 60 which has only one parallel part 62, it is high by setting the mutual space | interval L2 of the said parallel part 62 and the gypsum board 20 similarly to the space | interval L1 of Embodiment 1. Sound insulation performance can be obtained. Further, if possible, by setting the interval L2 in the same manner as the interval L2 in the first embodiment, further excellent sound insulation performance can be obtained.

（実施の形態３の効果）
このような構成によれば、平行部６２を一つのみ有する鋼板６０を用いた場合においても、遮音壁３の遮音性能を一層向上させることができる。 (Effect of Embodiment 3)
According to such a configuration, even when the steel plate 60 having only one parallel portion 62 is used, the sound insulation performance of the sound insulation wall 3 can be further improved.

〔III〕各実施の形態に対する変形例
以上、本発明の各実施の形態について説明したが、本発明の具体的な構成及び手段は、特許請求の範囲に記載した各発明の技術的思想の範囲内において、任意に改変及び改良することができる。以下、このような変形例について説明する。 [III] Modifications to Each Embodiment While the embodiments of the present invention have been described above, the specific configuration and means of the present invention are within the scope of the technical idea of each invention described in the claims. It can be arbitrarily modified and improved within. Hereinafter, such a modification will be described.

（解決しようとする課題や発明の効果について）
また、発明が解決しようとする課題や発明の効果は、前記した内容に限定されるものではなく、本発明によって、前記に記載されていない課題を解決したり、前記に記載されていない効果を奏することもでき、また、記載されている課題の一部のみを解決したり、記載されている効果の一部のみを奏することがある。 (About problems to be solved and effects of the invention)
In addition, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved.

（各実施の形態の組合せ）
各実施の形態に示した構成は、相互に組合せることができ、例えば、実施の形態２のグラスウール５０を、実施の形態３の構造に適用してもよい。 (Combination of each embodiment)
The configurations shown in the respective embodiments can be combined with each other. For example, the glass wool 50 of the second embodiment may be applied to the structure of the third embodiment.

（鋼板について）
鋼板の断面形状については、上述の形状以外にも種々の形状を採用することができる。図１０、１１には変形例に係る鋼板を用いた遮音壁の縦断面図を示す。図１０の遮音壁４において、鋼板７０の折り筋７１は、第１平行部７２、第２平行部７３、略水平状の非平行部７４を備えて構成されている。この場合にも、第１平行部７２と石膏ボード２０との間隔Ｌ１を実施の形態１の間隔Ｌ１と同様に設定し、第２平行部７３と石膏ボード２０との間隔Ｌ２を実施の形態１の間隔Ｌ２と同様に設定することで、遮音性能を高めることができる。また、図１１の遮音壁５において、鋼板８０の折り筋８１は、平行部８２と非平行部（湾曲部）８３とを備えて構成されている。この場合にも、平行部８２と石膏ボード２０との間隔Ｌ１を、実施の形態１の間隔Ｌ１や間隔Ｌ２と同様に設定することで、遮音性能を高めることができる。この他にも鋼板には各種の変形例を採用することができ、例えば平行部を３つ以上の平行部に分割してもよい。いずれの場合においても、石膏ボード２０に最も近接する平行部と石膏ボード２０との相互の間隔を、実施の形態１の間隔Ｌ１や間隔Ｌ２と同様に設定することで、同じ面密度の単層壁と同等以上の遮音性能を得ることができる。 (About steel plate)
As for the cross-sectional shape of the steel plate, various shapes can be adopted in addition to the above-described shape. 10 and 11 are longitudinal sectional views of sound insulation walls using steel plates according to modifications. In the sound insulation wall 4 of FIG. 10, the crease 71 of the steel plate 70 includes a first parallel portion 72, a second parallel portion 73, and a substantially horizontal non-parallel portion 74. Also in this case, the interval L1 between the first parallel portion 72 and the gypsum board 20 is set in the same manner as the interval L1 in the first embodiment, and the interval L2 between the second parallel portion 73 and the gypsum board 20 is set in the first embodiment. By setting in the same manner as the interval L2, the sound insulation performance can be improved. Further, in the sound insulating wall 5 of FIG. 11, the crease 81 of the steel plate 80 is configured to include a parallel part 82 and a non-parallel part (curved part) 83. Also in this case, the sound insulation performance can be improved by setting the distance L1 between the parallel portion 82 and the gypsum board 20 in the same manner as the distance L1 and the distance L2 in the first embodiment. In addition, various modifications can be adopted for the steel plate. For example, the parallel portion may be divided into three or more parallel portions. In any case, by setting the interval between the parallel portion closest to the gypsum board 20 and the gypsum board 20 in the same manner as the interval L1 and the interval L2 in the first embodiment, a single layer having the same surface density is obtained. Sound insulation performance equivalent to or better than walls can be obtained.

（板材について）
板材としては、石膏ボード２０の他にも、任意の平板状の部材を用いることができる。あるいは、複数の鋼板を並設して壁構造を構成してもよい。 (About board materials)
As a board | plate material, arbitrary flat members other than the gypsum board 20 can be used. Alternatively, a wall structure may be configured by arranging a plurality of steel plates.

（吸音手段について）
吸音手段は、グラスウール５０に限定されず、鋼板１０と石膏ボード２０との間を伝播する音エネルギーを吸収する可能な任意の手段を用いることができる。例えば高密度ロックウール、スポンジ、発泡ウレタン等を用いてもよい。特に、グラスウールやロックウールを用いた場合には、遮音性能以外にも、断熱性能や耐火性能を向上させることができる点で好ましい。また、吸音手段の配置位置は、上述の例に限定されず、例えば、鋼板１０における第１平行部や第２平行部と一対の非平行部とによって囲繞された凹状の空間部に、高密度ロックウールや発泡ウレタン等を充填することで、共振を低減させてもよい。 (About sound absorbing means)
The sound absorbing means is not limited to glass wool 50, and any means capable of absorbing sound energy propagating between the steel plate 10 and the gypsum board 20 can be used. For example, high density rock wool, sponge, foamed urethane or the like may be used. In particular, when glass wool or rock wool is used, it is preferable in that heat insulation performance and fire resistance performance can be improved in addition to sound insulation performance. Further, the arrangement position of the sound absorbing means is not limited to the above-described example. For example, the sound absorbing means has a high density in the concave space portion surrounded by the first parallel portion or the second parallel portion and the pair of non-parallel portions in the steel plate 10. Resonance may be reduced by filling rock wool or urethane foam.

本発明の実施の形態１に係る遮音壁の正面図である。It is a front view of the sound insulation wall concerning Embodiment 1 of the present invention. 図１の遮音壁の縦断面図である。It is a longitudinal cross-sectional view of the sound insulation wall of FIG. 図２の要部拡大図である。FIG. 3 is an enlarged view of a main part of FIG. 2. 図３のＡ−Ａ矢視断面図である。It is AA arrow sectional drawing of FIG. 中心周波数及び遮音性能評価対象周波数範囲の相互関係等を示す図である。It is a figure which shows the mutual relationship etc. of a center frequency and the sound insulation performance evaluation object frequency range. 変形例に係る遮音壁の拡大断面図である。It is an expanded sectional view of the sound insulation wall concerning a modification. 石膏ボード側から見た鋼板の正面図である。It is a front view of the steel plate seen from the gypsum board side. 実施の形態２に係る遮音壁の拡大断面図である。It is an expanded sectional view of the sound insulation wall concerning Embodiment 2. 実施の形態３に係る遮音壁の拡大断面図である。It is an expanded sectional view of the sound insulation wall concerning Embodiment 3. 変形例に係る鋼板の拡大断面図である。It is an expanded sectional view of the steel plate concerning a modification. 他の変形例に係る鋼板の拡大断面図である。It is an expanded sectional view of the steel plate concerning other modifications.

符号の説明Explanation of symbols

１、２、３、４、５ 遮音壁
１０、６０、７０、８０ 鋼板
１１、６１、７１、８１ 折り筋
１２、１２’、７２ 第１平行部
１３、１３’、７３ 第２平行部
１４、１４’、６３、７４、８３ 非平行部
２０ 石膏ボード
３０ コンクリート柱
４０ スタッド
４１ ビス
５０ グラスウール
６２、８２ 平行部 1, 2, 3, 4, 5 Sound insulation wall 10, 60, 70, 80 Steel plate 11, 61, 71, 81 Folding line 12, 12 ', 72 First parallel part 13, 13', 73 Second parallel part 14, 14 ', 63, 74, 83 Non-parallel part 20 Gypsum board 30 Concrete pillar 40 Stud 41 Screw 50 Glass wool 62, 82 Parallel part

Claims (5)

鋼板と板材とを、相互に非接触状かつ略平行になるように設置面に立設し、
前記鋼板には、当該鋼板を折り曲げて略水平の折り筋を形成することにより、前記板材に対して略平行な平行部と前記板材に対して略非平行な非平行部とを上下方向に交互に形成し、
前記平行部と前記板材との相互の間隔を、これら平行部と板材との相互間に生じる構造共振の周波数が、遮音性能評価対象周波数範囲の下限値より小さくなるように設定された目標周波数を下回る間隔としたこと、
を特徴とする耐震性を有する遮音壁構造。 The steel plate and the plate material are erected on the installation surface so that they are non-contact and substantially parallel to each other,
In the steel plate, by bending the steel plate to form a substantially horizontal crease, a parallel portion substantially parallel to the plate material and a non-parallel portion substantially non-parallel to the plate material are alternately arranged in the vertical direction. Formed into
The interval between the parallel part and the plate material is set to a target frequency set so that the frequency of the structural resonance generated between the parallel part and the plate material is smaller than the lower limit value of the sound insulation performance evaluation target frequency range. That it was less than the interval,
A sound insulation wall structure with earthquake resistance. 前記目標周波数として、第１目標周波数と、当該第１目標周波数よりも小さくなるように設定された第２目標周波数とが設定され、
前記平行部として、前記板材に対して略平行な第１平行部と、前記板材に略平行であって当該板材に対して前記第１平行部よりも遠方に配置される第２平行部とを形成し、
前記第１平行部と前記板材との相互の間隔を、これら第１平行部と板材との相互間に生じる構造共振の周波数が前記第１目標周波数を下回る間隔とし、
前記第２平行部と前記板材との相互の間隔を、これら第２平行部と板材との相互間に生じる構造共振の周波数が前記第２目標周波数を下回る間隔としたこと、
を特徴とする請求項１に記載の耐震性を有する遮音壁構造。 As the target frequency, a first target frequency and a second target frequency set to be smaller than the first target frequency are set,
As the parallel portion, a first parallel portion that is substantially parallel to the plate material, and a second parallel portion that is substantially parallel to the plate material and disposed farther than the first parallel portion with respect to the plate material. Forming,
The interval between the first parallel portion and the plate material is set as an interval at which the frequency of structural resonance generated between the first parallel portion and the plate material is lower than the first target frequency.
The interval between the second parallel portion and the plate material is set to an interval at which the frequency of structural resonance generated between the second parallel portion and the plate material is lower than the second target frequency.
The sound insulating wall structure having earthquake resistance according to claim 1. 前記板材を、前記鋼板の両側方において、当該鋼板に対して非接触状かつ略平行になるように設置面に立設し、
前記両側方に配置された前記板材の各々と、前記鋼板の平行部との相互の間隔を、前記請求項１又は２に記載の間隔としたこと、
を特徴とする耐震性を有する遮音壁構造。 The plate material is erected on the installation surface so as to be non-contact and substantially parallel to the steel plate on both sides of the steel plate,
The distance between each of the plate members arranged on the both sides and the parallel part of the steel sheet is set as the distance according to claim 1 or 2,
A sound insulation wall structure with earthquake resistance. 前記第１平行部の前記板材に対する投影面積を、前記第２平行部の前記板材に対する投影面積と前記非平行部の前記板材に対する投影面積との和より小さくしたこと、
を特徴とする請求項２に記載の耐震性を有する遮音壁構造。 The projected area of the first parallel portion with respect to the plate material is smaller than the sum of the projected area of the second parallel portion with respect to the plate material and the projected area of the non-parallel portion with respect to the plate material;
The sound insulation wall structure having earthquake resistance according to claim 2. 前記鋼板と前記板材との相互間に、これら鋼板と板材との少なくとも一方に対して非接触になるように吸音手段を配置したこと、
を特徴とする請求項１から４のいずれか一項に記載の耐震性を有する遮音壁構造。 Sound absorbing means is disposed between the steel plate and the plate material so as to be non-contact with respect to at least one of the steel plate and the plate material,
The sound insulation wall structure which has earthquake resistance as described in any one of Claim 1 to 4 characterized by these.
JP2007172111A 2007-06-29 2007-06-29 Sound insulation wall structure with earthquake resistance Expired - Fee Related JP5026870B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS534312A (en) * 1976-06-25 1978-01-14 Showa Koji Kk Sound insulation wall body for building and construction
JPH0766588A (en) * 1993-08-27 1995-03-10 Nippon Steel Corp Sandwich structure member, shielding performance, sandwich panel and sandwich structure having excellent sound insulation performance and electromagnetic
JPH1037619A (en) * 1996-07-19 1998-02-10 Matsushita Electric Works Ltd Sound-proof door
JP2006037586A (en) * 2004-07-29 2006-02-09 Takenaka Komuten Co Ltd Earthquake-resisting wall using corrugated steel plate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS534312A (en) * 1976-06-25 1978-01-14 Showa Koji Kk Sound insulation wall body for building and construction
JPH0766588A (en) * 1993-08-27 1995-03-10 Nippon Steel Corp Sandwich structure member, shielding performance, sandwich panel and sandwich structure having excellent sound insulation performance and electromagnetic
JPH1037619A (en) * 1996-07-19 1998-02-10 Matsushita Electric Works Ltd Sound-proof door
JP2006037586A (en) * 2004-07-29 2006-02-09 Takenaka Komuten Co Ltd Earthquake-resisting wall using corrugated steel plate

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