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JP3123028U - Sound absorbing material - Google Patents

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JP3123028U
JP3123028U JP2006001101U JP2006001101U JP3123028U JP 3123028 U JP3123028 U JP 3123028U JP 2006001101 U JP2006001101 U JP 2006001101U JP 2006001101 U JP2006001101 U JP 2006001101U JP 3123028 U JP3123028 U JP 3123028U
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absorbing material
sound absorbing
sound
sheet
sand
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利明 杉浦
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Taiyu Kensetsu KK
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Abstract

【課題】 本考案の課題は、騒音全体に対する吸音性が、壁材の間等狭い空間に押し込んだ場合でも、より向上する吸音材を提供することにある。
【解決手段】 2枚以上の多孔質で板状の吸音材において、おのおのの該吸音材と該吸音材の間に、片面に微細な凹凸を形成したシートを挿入して接着し、一体化させたことを特徴とする吸音材。
【選択図】図1
PROBLEM TO BE SOLVED: To provide a sound-absorbing material in which the sound-absorbing property with respect to the entire noise is improved even when it is pushed into a narrow space such as between wall materials.
[MEANS FOR SOLVING PROBLEMS] In two or more porous and plate-like sound absorbing materials, a sheet having fine irregularities formed on one side is inserted between the sound absorbing material and the sound absorbing material, and bonded and integrated. A sound absorbing material characterized by that.
[Selection] Figure 1

Description

本考案は、騒音等を吸音する吸音材に関する。詳しくは、建設資材として主に壁等に用いる吸音材に関する。  The present invention relates to a sound absorbing material that absorbs noise and the like. Specifically, the present invention relates to a sound absorbing material mainly used for a wall or the like as a construction material.

建築物には吸音を目的として壁等にロックウール、グラスウール、ウレタンフォーム、石膏ボード等が用いられ,その品質はJISA6301に規定されている。この中でも、グラスウールは吸音性、施工性、コストに優れ、広く一般的に用いられている。また、ウレタンフォーム等多孔質発泡性樹脂製品も性能に非常に優れ、広く用いられている。  For buildings, rock wool, glass wool, urethane foam, gypsum board, and the like are used for walls and the like for the purpose of sound absorption, and the quality is specified in JIS A6301. Among these, glass wool is excellent in sound absorption, workability, and cost, and is widely used. In addition, porous foamed resin products such as urethane foam are also excellent in performance and widely used.

このグラスウールを用いた吸音材として、複数のグラスウール板の間に振動周波数の異なる層を形成して、より吸音効果を向上させたものが開示されている。特許文献1は、グラスウール等繊維質材料の内部にポリエチレン、塩化ビニル等からなる有機質シートを挟んだものである。また、特許文献2は、2枚にグラスウール板の間にスペーサーを介して空間を形成したものである。
特開2000−267672号 実開平6−34936号
As a sound absorbing material using this glass wool, a material in which layers having different vibration frequencies are formed between a plurality of glass wool plates to further improve the sound absorbing effect is disclosed. In Patent Document 1, an organic sheet made of polyethylene, vinyl chloride or the like is sandwiched inside a fibrous material such as glass wool. In Patent Document 2, a space is formed between two glass wool plates via a spacer.
JP 2000-267672 A ACT 6-34936

しかしながら、特許文献1の方法では、低周波数の騒音低減には効果があるものの、全体の騒音低減効果の向上は若干小さい。特許文献2の方法では、壁材の間の狭い空間に吸音材を配置させようとすれば吸音材が圧縮され、グラスウール間の空間が閉塞しグラスウール同士が密着することによって、通常のグラスウールと吸音性が同程度に低下する懸念がある。  However, although the method of Patent Document 1 is effective in reducing low-frequency noise, the overall noise reduction effect is slightly small. In the method of Patent Document 2, if a sound absorbing material is arranged in a narrow space between wall materials, the sound absorbing material is compressed, the space between the glass wools is closed, and the glass wools are brought into close contact with each other. There is concern that the sex will drop to the same extent.

本考案の課題は、騒音全体に対する吸音性が、壁材の間等狭い空間に押し込んだ場合でも、より向上する吸音材を提供することにある。  The subject of this invention is providing the sound-absorbing material which improves more even if the sound-absorbing property with respect to the whole noise pushes into a narrow space, such as between wall materials.

上記課題を解決するため、本考案は以下のように構成されている。
まず第1の考案は、2枚以上の多孔質で板状の吸音材において、おのおのの該吸音材と該吸音材の間に、片面に微細な凹凸を形成したシートを挿入して接着し、一体化させたことを特徴とする吸音材である。多孔質で板状の吸音材と該吸音材の間にシートを挿入しただけでも、該吸音材の吸音性だけでなく、シートの遮音性が加味されて、騒音の伝播が抑制されるが、本考案では更に、挿入したシートに形成された微細な凹凸により吸音材とシートの間に微細な形状の空隙層が形成されることにより、騒音の伝播がより抑制され、吸音効果がより向上する。また、微細な空隙が連続している状態であるので、壁材の間等狭い空間に押し込んで、若干屈折した状態であっても微細な空隙が閉塞されることがなく、良好な吸音効果を維持できる。
In order to solve the above problems, the present invention is configured as follows.
First, in the first device, in two or more porous and plate-like sound absorbing materials, a sheet having fine irregularities formed on one side is inserted and bonded between the sound absorbing material and the sound absorbing material, The sound absorbing material is characterized by being integrated. Even if a sheet is inserted between the porous and plate-like sound absorbing material and the sound absorbing material, not only the sound absorbing property of the sound absorbing material but also the sound insulating property of the sheet is taken into consideration, and the propagation of noise is suppressed. Furthermore, in the present invention, a fine gap is formed between the sound absorbing material and the sheet by the fine unevenness formed on the inserted sheet, so that the noise propagation is further suppressed and the sound absorbing effect is further improved. . In addition, since the fine gaps are continuous, the fine gaps are not blocked even if they are pushed into a narrow space such as between wall materials and slightly refracted, and a good sound absorbing effect is obtained. Can be maintained.

次に第2の考案は、多孔質で板状の吸音材と該吸音材の間に挿入する片面に微細な凹凸を形成したシートが、紙に所定粒度の砂を接着剤で定着したもの、ビニールシートに所定粒度の砂を接着剤で定着したもの、アルミ箔に所定粒度の砂を接着剤で定着したもの、サンドペーパー、サンドペーパーに所定粒度の砂を接着剤で定着したもの、のいずれかより任意に選択されるものであることを特徴とする吸音材である。これらを用いることで、片面に微細な凹凸を形成したシートが容易に得られ、これを吸音材同志の間に挿入し接着することで、所望する吸音効果を得ることができる。  Next, the second device is a porous and plate-like sound absorbing material and a sheet in which fine irregularities are formed on one surface inserted between the sound absorbing materials, sand having a predetermined particle size fixed on paper with an adhesive, Any one of sand fixed to the vinyl sheet with adhesive, sand fixed to the aluminum foil with adhesive, sand paper, sand paper fixed to the sand with predetermined adhesive It is a sound absorbing material characterized by being arbitrarily selected. By using these, a sheet having fine irregularities formed on one side can be easily obtained, and a desired sound absorbing effect can be obtained by inserting and bonding the sheet between the sound absorbing materials.

そして第3の考案は、多孔質で板状の吸音材の材質が、グラスウール、ウレタンフォーム、ポリエチレンフォーム、のいずれかより任意に選択されるものであることを特徴とする吸音材である。これらを用いることで、より確実に吸音効果を得ることができる。  The third device is a sound absorbing material, wherein the material of the porous and plate-like sound absorbing material is arbitrarily selected from glass wool, urethane foam, and polyethylene foam. By using these, the sound absorption effect can be obtained more reliably.

以上のような構成の吸音材とすることで、単にシート(フィルム)を挟み込んだ場合より、吸音効果がより向上し、伝播する騒音をより抑制することができる。また、紙に所定粒度の砂を散布し接着剤で定着した等によるシートを用いることで、狭い空間に本吸音材を押し込むことが容易であり、押し込んだことにより吸音材が屈折した状態になっている場合でも、シート表面に形成された微細な空隙が閉塞することなく、吸音材として所望の効果を維持できる。  By using the sound absorbing material having the above-described configuration, the sound absorbing effect can be further improved and the propagating noise can be suppressed more than when a sheet (film) is simply sandwiched. In addition, by using a sheet made by spreading sand of a predetermined particle size on paper and fixing it with an adhesive, it is easy to push the sound absorbing material into a narrow space, and the sound absorbing material is refracted by being pushed in. Even if it is, the desired effect as a sound-absorbing material can be maintained without blocking fine voids formed on the sheet surface.

以下に、本考案を実施するための最良の形態について、図面を用いて説明する。
図1は、本考案による吸音材1断面図である。図2は、片面に微細な凹凸を形成したシート2の断面図である。図3は、片面に微細な凹凸を形成したシート2を挿入部分の拡大部分断面図である。
Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view of a sound absorbing material 1 according to the present invention. FIG. 2 is a cross-sectional view of the sheet 2 in which fine irregularities are formed on one side. FIG. 3 is an enlarged partial cross-sectional view of a portion where the sheet 2 having fine irregularities formed on one side is inserted.

まず図1では、3枚の多孔質で板状の吸音材3を用い、これらを合わせたとき生ずる2つの隙間に、片面に微細な凹凸を形成したシート2(以下、本考案シート2という)を1枚ずつ合計2枚挿入し、すべてを接着剤で接着し、1枚の吸音材1としたものである。ここで、吸音材1の厚さは特に限定されないが、吸音性や施工性を考慮すると30〜100mmが好ましい。  First, in FIG. 1, a sheet 2 (hereinafter referred to as “developed sheet 2”) in which three porous and plate-like sound absorbing materials 3 are used and two gaps formed when these are combined to form fine irregularities on one side is formed. A total of two sheets are inserted one by one, and all are bonded with an adhesive to form one sound absorbing material 1. Here, the thickness of the sound-absorbing material 1 is not particularly limited, but is preferably 30 to 100 mm in consideration of sound-absorbing properties and workability.

また、図1では多孔質で板状の吸音材3を3枚、本考案シート2を2枚で吸音材1を構成したが、多孔質で板状の吸音材3が2枚、本考案シート2が1枚でもよい。更に、多孔質で板状の吸音材3が3枚より多い場合でもよく、多孔質で板状の吸音材3がn枚とすると、本考案シート2がn−1枚であればよい。加工性や施工性を考慮すると、多孔質で板状の吸音材3が2〜4枚、本考案シート2が1〜3枚であることが好ましい。  Further, in FIG. 1, the sound absorbing material 1 is composed of three porous plate-like sound absorbing materials 3 and two inventive device sheets 2, but two porous, plate-like sound absorbing materials 3 are provided. 2 may be one. Furthermore, there may be more than three porous plate-like sound absorbing materials 3, and if the number of porous plate-like sound absorbing materials 3 is n, the invention sheet 2 may be n−1. In consideration of workability and workability, it is preferable that 2 to 4 porous plate-like sound absorbing materials 3 and 1 to 3 inventive device sheets 2 are provided.

本考案に用いる多孔質で板状の吸音材3は一般的に吸音材として用いられているものでよく、その中でも、グラスウール、ウレタンフォーム、ポリエチレンフォームのうち任意に選択される材質からなるものが特に好ましい。また、その1枚の厚さも任意でよいが、吸音性や施工性等を考慮すると、10〜50mmが好ましい。また、おのおのの多孔質で板状の吸音材3の厚さは同じものでも、異なるものでもかまわない。  The porous and plate-like sound absorbing material 3 used in the present invention may be generally used as a sound absorbing material, and among them, those made of a material selected arbitrarily from glass wool, urethane foam, and polyethylene foam. Particularly preferred. Moreover, the thickness of the one sheet may be arbitrary, but 10 to 50 mm is preferable in consideration of sound absorption and workability. In addition, the thickness of each porous and plate-like sound absorbing material 3 may be the same or different.

本考案シート2は、図2に示すように、薄く変形性のよいシート2aに接着剤2cを介して所定粒度の砂2bを散布し定着させたものである。薄く変形性のよいシート2aは、紙、ビニールシート、アルミ箔が好適に用いられ、その厚さは変形性や強度を考慮すると、0.05〜0.1mmが好ましい。所定粒度の砂2bは、粒形が整い単粒度のものであればよく、珪砂や人工砂が好ましい。粒径の大きさはシート2aへの定着性、本考案シート2としたときの表面形状等を考慮すると、最大寸法0.2〜1.0mmが好ましい。より好ましくは0.3〜0.6mmがよい。また、所定粒度の砂2bの散布量すなわちシート2aへの定着量は、本考案シート2としたときの表面形状等を考慮すると、0.1〜0.8g/mが好ましい。より好ましくは0.2〜0.5g/mがよい。接着剤2cは、接着性のよいものであれは特に限定されるものではない。以上のように形成された本考案シート2の厚さは、変形性、強度等を考慮すると、0.5〜1.0mmが好ましい。As shown in FIG. 2, the inventive sheet 2 is obtained by spraying and fixing sand 2 b having a predetermined particle size through an adhesive 2 c on a thin sheet 2 a having good deformability. As the thin sheet 2a having good deformability, paper, vinyl sheet, and aluminum foil are preferably used, and the thickness thereof is preferably 0.05 to 0.1 mm in consideration of deformability and strength. The sand 2b having a predetermined particle size may be of a single particle size with a uniform particle shape, and is preferably silica sand or artificial sand. In consideration of the fixing property to the sheet 2a, the surface shape of the invention sheet 2, and the like, the maximum particle size is preferably 0.2 to 1.0 mm. More preferably, the thickness is 0.3 to 0.6 mm. The amount of sand 2b having a predetermined particle size, that is, the amount fixed on the sheet 2a, is preferably 0.1 to 0.8 g / m 2 in consideration of the surface shape and the like when the sheet 2 of the present invention is used. More preferably, 0.2 to 0.5 g / m 2 is preferable. The adhesive 2c is not particularly limited as long as it has good adhesiveness. The thickness of the inventive sheet 2 formed as described above is preferably 0.5 to 1.0 mm in consideration of deformability, strength, and the like.

また、サンドペーパーは予め砂を紙に定着してあるものであるので、本考案シート2として好適に用いることができる。更に、サンドペーパーに前記所定粒度の砂2bを接着剤2cで定着したものも、本考案シート2として好適に用いることができる。  Moreover, since sandpaper has sand previously fixed on paper, it can be suitably used as the inventive sheet 2. Furthermore, what fixed the sand 2b of the said predetermined particle size to the sandpaper with the adhesive agent 2c can be used suitably as this invention sheet 2. FIG.

以上のように形成した本考案シート2を、図3に示すように、多孔質で板状の吸音材3と該吸音材3との間に挟み、接着剤4を用い本考案シート2と多孔質で板状の吸音材3を接着し、一体化させて吸音材1が形成される。なお、接着剤4もシート形成に用いた接着剤2cと同様、接着性のよいものであれは特に限定されるものではない。  As shown in FIG. 3, the inventive sheet 2 formed as described above is sandwiched between a porous and plate-like sound absorbing material 3 and the sound absorbing material 3. The sound-absorbing material 1 is formed by adhering and integrating the plate-like sound-absorbing material 3. Note that the adhesive 4 is not particularly limited as long as it has good adhesiveness, like the adhesive 2c used for forming the sheet.

本考案の実施例について、以下詳細に説明する。但し、本考案は以下の実施例に限定されるものではない。  Embodiments of the present invention will be described in detail below. However, the present invention is not limited to the following examples.

表1に示す本考案シート2を作成した。なお、表1のA〜Eは本考案シート2に含まれるものであり、Fは比較例として用いるもので、表面の凹凸を形成させていないシートである。  The inventive device sheet 2 shown in Table 1 was prepared. In addition, A to E in Table 1 are included in the present invention sheet 2, and F is used as a comparative example and is a sheet on which no surface irregularities are formed.

Figure 0003123028
Figure 0003123028

ここで、所定粒度の砂2bは珪砂を用い、その最大寸法は0.5mmで、定着量は0.3g/mとした。珪砂の定着に用いた接着剤2cは、G17スプレーボンド(コニシ社製、クロロプレンゴム)を用いた。Here, the sand 2b having a predetermined particle size is quartz sand, the maximum dimension is 0.5 mm, and the fixing amount is 0.3 g / m 2 . G17 spray bond (Konishi Co., Ltd., chloroprene rubber) was used as the adhesive 2c used for fixing the silica sand.

これらを多孔質で板状の吸音材3に挟み込み、接着一体化して吸音材1を作成した。ここで、多孔質で板状の吸音材3の種類を表2に示す。  These were sandwiched between porous and plate-like sound absorbing materials 3 and bonded and integrated to create the sound absorbing material 1. Here, Table 2 shows the types of the porous and plate-like sound absorbing material 3.

Figure 0003123028
Figure 0003123028

作成した吸音材1は、図1に示したものと同様、3枚の多孔質で板状の吸音材3の2つの間隙にシート2を1枚ずつ計2枚用いたものである。シート2と多孔質で板状の吸音材3との接着に用いた接着剤4は、前記接着剤2cと同一のものとした。作成した吸音材1の種類を表3に示す。なお、比較例1として厚さ100mmの1枚もののグラスウール(表2のeに相当する)と、比較例2として表1のシートFを用い作成したものとした。また、実施例1〜4は各種本考案シート2を用い吸音材1の全厚を約100mmとしたもの、実施例5〜8は各種本考案シートを用い吸音材1の全厚を約30mmとしたもの、実施例9〜12は各種本考案シートを用い吸音材1の全厚を約45mmとしたものである。  The produced sound absorbing material 1 is the same as that shown in FIG. 1, in which a total of two sheets 2 are used in two gaps between three porous plate-like sound absorbing materials 3. The adhesive 4 used for bonding the sheet 2 to the porous plate-like sound absorbing material 3 was the same as the adhesive 2c. Table 3 shows the types of the sound-absorbing material 1 created. In addition, the glass wool (equivalent to e of Table 2) with a thickness of 100 mm as Comparative Example 1 and the sheet F of Table 1 as Comparative Example 2 were prepared. In addition, Examples 1 to 4 use various inventive devices 2 and set the total thickness of the sound absorbing material 1 to about 100 mm. Examples 5 to 8 use various inventive devices to set the total thickness of the sound absorbing material 1 to about 30 mm. In Examples 9-12, various sheets of the present invention were used and the total thickness of the sound absorbing material 1 was about 45 mm.

Figure 0003123028
Figure 0003123028

図3に示すように、これら吸音材1を騒音源であるスピーカー5から0.1m離れた位置に垂立させた。更に、スピーカーと反対方向に、吸音材1から水平距離3.0m、地面7より0.45m上方に騒音計6を設置した。スピーカー5より発せられ、吸音材1を通過した騒音を、騒音計6に付随するマイク6aで拾い、騒音測定を行った。なお、本測定は、騒音レベルL5(所定長さの時間中に測定された騒音の最大値。今回は1秒間に1000回測定したものの最大値)の騒音値を求めることによって行った。測定結果を表4に示す。  As shown in FIG. 3, these sound absorbing materials 1 were suspended at a position 0.1 m away from the speaker 5 as a noise source. Further, a noise level meter 6 was installed in a direction opposite to the speaker at a horizontal distance of 3.0 m from the sound absorbing material 1 and 0.45 m above the ground 7. The noise emitted from the speaker 5 and passing through the sound absorbing material 1 was picked up by the microphone 6a attached to the sound level meter 6 and measured for noise. This measurement was performed by determining the noise value of the noise level L5 (the maximum value of the noise measured during a predetermined length of time, this time the maximum value measured 1000 times per second). Table 4 shows the measurement results.

Figure 0003123028
Figure 0003123028

表4より、比較例の騒音減少が9.8〜11.2dB(A)であるに対し、比較例と同程度の厚さの実施例1〜4は17.5〜22.3dB(A)減少と、比較例より2倍程度の騒音減少を示した。また、厚さが比較例の1/3程度しかない実施例5〜8でも17.6〜21.7dB(A)減少し、厚さが比較例の1/2以下である実施例9〜12では21.6〜22.2dB(A)の減少と、実施例1〜4と同程度の優れた騒音低減性を示した。本考案による吸音材は、厚さが小さくとも、通常の吸音材より優れた騒音低減性を示すことが実証された。  From Table 4, the noise reduction of the comparative example is 9.8 to 11.2 dB (A), while Examples 1 to 4 having the same thickness as the comparative example are 17.5 to 22.3 dB (A). It showed a decrease and a noise reduction of about twice that of the comparative example. Further, even in Examples 5 to 8 having a thickness of only about 1/3 of that of the comparative example, Examples 1 to 12 having a reduction of 17.6 to 21.7 dB (A) and a thickness of 1/2 or less of that of the comparative example. Shows a reduction of 21.6 to 22.2 dB (A) and an excellent noise reduction performance similar to that of Examples 1 to 4. It has been demonstrated that the sound absorbing material according to the present invention exhibits a noise reduction performance superior to that of a normal sound absorbing material even when the thickness is small.

また、本実施例は、比較例と同様、折り曲げ等も自由に行えた。これより、本考案による吸音材は狭い空間にも容易に挿入可能なことが認められた。  Further, in this example, bending and the like could be performed freely as in the comparative example. From this, it was recognized that the sound absorbing material according to the present invention can be easily inserted into a narrow space.

本考案による吸音材の断面図である。  It is sectional drawing of the sound-absorbing material by this invention. 片面に微細な凹凸を形成したシート2の断面図である。  It is sectional drawing of the sheet | seat 2 which formed the fine unevenness | corrugation on one side. 本考案による吸音材において、片面に微細な凹凸を形成したシート2の挿入部分の拡大部分断面図である。  In the sound-absorbing material according to the present invention, it is an enlarged partial cross-sectional view of an insertion portion of a sheet 2 in which fine irregularities are formed on one side. 吸音材の騒音低減効果を確認するための測定装置である。  It is a measuring device for confirming the noise reduction effect of the sound absorbing material.

符号の説明Explanation of symbols

1 吸音材
2 片面に微細な凹凸を形成したシート
2a 薄く変形性のよいシート
2b 所定粒度の砂
2c 所定粒度の砂を薄く変形性のよいシートに定着させるための接着剤
3 多孔質で板状の吸音材
4 片面に微細な凹凸を形成したシートと多孔質で板状の吸音材を接着させる接着剤
5 騒音源(スピーカー)
6 騒音計
6a 騒音計に付随するマイク
7 地面
DESCRIPTION OF SYMBOLS 1 Sound absorbing material 2 Sheet | seat 2a which formed the fine unevenness | corrugation on one side Thin sheet 2b with good deformability Sand 2c with predetermined grain size Adhesive for fixing sand with predetermined grain size to thin sheet with good deformability 3 Porous and plate-like Sound absorbing material 4 Adhesive 5 that adheres a porous plate-shaped sound absorbing material to a sheet with fine irregularities on one side 5 Noise source (speaker)
6 Sound level meter 6a Microphone attached to sound level meter 7 Ground

Claims (3)

2枚以上の多孔質で板状の吸音材において、おのおのの該吸音材と該吸音材の間に、片面に微細な凹凸を形成したシートを挿入して接着し、一体化させたことを特徴とする吸音材。  In two or more porous and plate-shaped sound absorbing materials, a sheet having fine irregularities formed on one side is inserted and bonded between the sound absorbing material and the sound absorbing material, and integrated. Sound absorbing material. 片面に微細な凹凸を形成したシートが、紙に所定粒度の砂を接着剤で定着したもの、ビニールシートに所定粒度の砂を接着剤で定着したもの、アルミ箔に所定粒度の砂を接着剤で定着したもの、サンドペーパー、サンドペーパーに所定粒度の砂を接着剤で定着したもの、のいずれかより任意に選択されるものであることを特徴とする請求項1に記載の吸音材。  A sheet with fine irregularities on one side is made by fixing sand with a predetermined particle size on paper with an adhesive, sand with a predetermined particle size fixed on a vinyl sheet with an adhesive, and sand with a predetermined particle size on an aluminum foil. The sound-absorbing material according to claim 1, wherein the sound-absorbing material is arbitrarily selected from any one of those fixed by (1), sandpaper, and sandpaper having sand of a predetermined particle size fixed by an adhesive. 多孔質で板状の吸音材の材質が、グラスウール、ウレタンフォーム、ポリエチレンフォーム、のいずれかより任意に選択されるものであることを特徴とする請求項1及び2に記載の吸音材。  The sound-absorbing material according to claim 1 or 2, wherein the material of the porous and plate-shaped sound-absorbing material is arbitrarily selected from glass wool, urethane foam, and polyethylene foam.
JP2006001101U 2006-01-23 2006-01-23 Sound absorbing material Expired - Fee Related JP3123028U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3514878B2 (en) 1995-07-12 2004-03-31 積水化学工業株式会社 Gutter fitting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3514878B2 (en) 1995-07-12 2004-03-31 積水化学工業株式会社 Gutter fitting

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