JPS6313738A - Vibration-damping sound-insulating sheet - Google Patents
Vibration-damping sound-insulating sheetInfo
- Publication number
- JPS6313738A JPS6313738A JP15630186A JP15630186A JPS6313738A JP S6313738 A JPS6313738 A JP S6313738A JP 15630186 A JP15630186 A JP 15630186A JP 15630186 A JP15630186 A JP 15630186A JP S6313738 A JPS6313738 A JP S6313738A
- Authority
- JP
- Japan
- Prior art keywords
- sound
- asphalt
- vibration
- insulating sheet
- damping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000013016 damping Methods 0.000 title claims description 20
- 239000010426 asphalt Substances 0.000 claims description 23
- 239000004745 nonwoven fabric Substances 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 12
- 239000005060 rubber Substances 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 6
- 238000004898 kneading Methods 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000010440 gypsum Substances 0.000 description 7
- 229910052602 gypsum Inorganic materials 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 3
- 235000011613 Pinus brutia Nutrition 0.000 description 3
- 241000018646 Pinus brutia Species 0.000 description 3
- 239000011491 glass wool Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000009291 secondary effect Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Landscapes
- Building Environments (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
- Laminated Bodies (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は転炉風砕スラグとアスファルトを主原料とし
て、これを混練して薄板に加工し不織布を接着した制振
遮音シートに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vibration-damping and sound-insulating sheet made of pulverized converter slag and asphalt as main raw materials, kneaded and processed into a thin plate, and bonded with a nonwoven fabric.
従来一般的な制振、遮音材としては、ゴム、アスファル
トを粘結材（バインダー）とし、鉄粉や砂鉄を骨材とし
たものやアスファルトを樹脂で固めたものがある。また
補強材として石綿、グラスウール、ロックウール、繊維
クズ等を混入している。Conventional vibration damping and sound insulating materials that have been commonly used include those that use rubber or asphalt as a binder and iron powder or iron sand as aggregates, and those that use asphalt hardened with resin. In addition, asbestos, glass wool, rock wool, textile scraps, etc. are mixed in as reinforcing materials.
しかし、これらの制振、遮音材は原材料及び成形加工等
の両面でコス）・が高い。またアスファルトはそのまま
ではバインダーとしての機成的強度、難燃性、耐熱性、
被制振材への付着強度、耐薬品性等の面で充分な性能を
持っているものとは言えない。However, these vibration damping and sound insulating materials are expensive in terms of both raw materials and molding process. In addition, asphalt has mechanical strength as a binder, flame retardancy, heat resistance,
It cannot be said that it has sufficient performance in terms of adhesion strength to the damping material, chemical resistance, etc.
上記のような従来の制振遮音シートにおいては、ゴム又
はアスファルトをバインダー（粘結材）として使用して
いるものの骨材として（ま、砂鉄、鉄ｆｆｌ、石綿、グ
ラスウール、口・ツクウール、ｔａｓｋ＜ず等を使用し
ているため、骨材の原価は高く、又板状に成形したまま
であるから壁面への付着力が弱（、更に機械的強度、難
燃性、耐熱性、耐薬品性等の点で問題があった。In the conventional vibration-damping and sound-insulating sheets as described above, rubber or asphalt is used as a binder (caking material), but as aggregates (e.g., iron sand, iron ffl, asbestos, glass wool, copper wool, task < Because aggregate is used, the cost of aggregate is high, and since it is still formed into a plate shape, its adhesion to the wall is weak (in addition, it has poor mechanical strength, flame retardance, heat resistance, and chemical resistance). There were problems with this.
この発明は上記のような問題を解決することをと目的す
る。This invention aims to solve the above problems.
この発明にかかる制振遮音シートは、転炉風砕゛スラグ
と、アスファル１−又はゴムアスファルトと添加剤を混
練して板状に成形し表面に不織布等の繊維を接着したも
のである。The vibration-damping and sound-insulating sheet according to the present invention is made by kneading converter air-blown slag, asphalt 1 or rubber asphalt, and additives, forming it into a plate shape, and bonding fibers such as nonwoven fabric to the surface.
この発明にかかる転炉スラグより製造した風砕スラグは
多量の気泡や酸化鉄などを含んでいると共に表面には凹
凸の多い形状をしているので、バインダーとしてのアス
ファルト又はゴムアスファルトと良く結合しこれによる
シートは外力に対しては比較的剛性を有すると共に＠動
や音波のエネルギーを粘性減衰する。The ground slag produced from the converter slag according to the present invention contains a large amount of air bubbles and iron oxide, and has a rough surface, so it does not bond well with asphalt or rubber asphalt as a binder. The resulting sheet has relatively rigidity against external forces and viscously damps the energy of @ motion and sound waves.
又、上記のシートの表面に不織布をはり付けた物は他の
構成面との接着力を有するほか耐油性、耐薬品性を有す
る。Furthermore, the above-mentioned sheet with a nonwoven fabric pasted on its surface has not only adhesive strength with other constituent surfaces but also oil resistance and chemical resistance.
この発明にかかる制振遮音シート（防音マツ１−とも呼
ぶ）は粒度０．２〜０．３＋ｎｍの転炉風砕スラグをゴ
ムアスファルトに混合し、（混合割合；風砕スラグ８０
％：ゴムアスファルト２０％）４Ｍ厚の板状に加工した
ものに不織布を貼付けてンー１−とし、これを住宅の階
上床、衝撃音の制振遮音ンー１−として使用する。The vibration damping and sound insulating sheet (also referred to as Soundproof Pine 1-) according to the present invention is produced by mixing converter blown slag with a particle size of 0.2 to 0.3+nm into rubber asphalt (mixing ratio: 800
%: Rubber asphalt (20%)) A non-woven fabric is pasted on a 4M thick plate processed to form a plate shape, and this is used as an upper floor of a house and as a sound damping and sound insulation device for impact noise.
第１図（ａ）、（ｂ）は上記の割振遮音シートを建築物
に使用するときの構成を示す（＋１）は♀１視図、（ｂ
）は説明図である。図において、１．ｌａは梁、２は小
梁、３は梁１，１ａの上に設けたパーティクルボード、
４は転炉風砕スラグとアスファルＩ−の混練シート、４
ｎ、４ｂはポリエステルの不ｔ１布、５はこの発明によ
ろ制振遮音シート、７は合板、９は床仕上材、１１は壁
仕上材、１３は石膏ボード、１５は石膏ボード、１７は
グラスウール、１９は石膏ボード、２１は石膏ボード、
２３は壁仕上材である。Figures 1 (a) and (b) show the configuration when the above-mentioned distributed sound insulation sheet is used in a building. (+1) is a view from ♀1, and (b)
) is an explanatory diagram. In the figure, 1. la is a beam, 2 is a small beam, 3 is a particle board installed on beams 1 and 1a,
4 is a kneaded sheet of blasted converter slag and asphalt I-;
n and 4b are polyester non-t1 cloth, 5 is a vibration damping and sound insulating sheet according to the present invention, 7 is plywood, 9 is a floor finishing material, 11 is a wall finishing material, 13 is a gypsum board, 15 is a gypsum board, 17 is glass wool , 19 is gypsum board, 21 is gypsum board,
23 is a wall finishing material.
上記の様に構成した建築物において、ＪＩＳＡ１４１８
、及びＪＩＡ１４１９に型処した測定方法及び遮音等級
に基づいて床衝撃音遮断性能を調べたものを第２図と第
３図に示した。In the building constructed as above, JISA1418
Figures 2 and 3 show the floor impact sound insulation performance investigated based on the measurement method and sound insulation grade specified in JIA1419.
第２図と第３図はこの発明にかかる防音マット（制振遮
音シートと同意）を使用した場合と、防音マ・ソトなし
の場合について床衝撃音遮断性能を調査した結果を示す
線図であり、第２図は軽量衝撃音、第３図（よ重量衝撃
音に関する。Figures 2 and 3 are diagrams showing the results of a survey of floor impact sound isolation performance when using the soundproofing mat (same as the vibration damping and soundproofing sheet) according to the present invention and when not using the soundproofing mat. Yes, Fig. 2 relates to light impact noise, and Fig. 3 relates to heavy impact noise.
図において、横軸にはオクターブバンド中心周波数（Ｈ
ｚ）を縦軸には床衝撃音レベル（ｄＢ）を示した。In the figure, the horizontal axis shows the octave band center frequency (H
The vertical axis shows the floor impact sound level (dB).
第２図の線図によって防音マットを使用したもの、つま
り実線はＬ−６５の線以下にあるので遮音等級Ｌ−６５
と判定され浸れている。防音マットなしの物は点線で示
しＬ−７０の線以下にあるから遮音等級Ｌ−７０と判定
され劣っていることが明らかである。According to the diagram in Figure 2, the sound insulation mat is used, the solid line is below the L-65 line, so the sound insulation grade is L-65.
It has been determined that this is the case. The item without the sound insulation mat is shown by the dotted line and is below the L-70 line, so it is clearly determined that the sound insulation grade is L-70 and is inferior.
第３図の線図ば重量衝撃音のテストデータで防音マツｌ
、を使用したものはＬ−７０の線以下にあるから遮音等
級Ｌ−７０と判定され優れている。The line diagram in Figure 3 shows the weight impact sound test data of soundproof pine l.
, which is below the L-70 line, is judged to have a sound insulation grade of L-70 and is excellent.
防音マツｌ、なしの件については上記判定と同様にして
遮音等級Ｌ−７５となり劣っていることが明らかである
。As for the case of soundproofing pine L and none, the soundproofing grade was L-75 in the same way as the above judgment, and it is clear that it is inferior.
上記の実施例においては混練シート４の両側にポリエス
テル繊維から成る不織布４ａ、４ｂを接着した物を示し
たが、この不織布４ａ、４ｂは片側であっても、又無く
ても制振及び遮音効果を有するものである。In the above embodiment, non-woven fabrics 4a and 4b made of polyester fibers are bonded to both sides of the kneading sheet 4, but even if the non-woven fabrics 4a and 4b are attached to one side or not, the vibration-damping and sound-insulating effects can be achieved. It has the following.
不織布４ａ、４ｂを接着すれば曲げ強度を増すとか、取
扱いが便利（手に接着したり、ねばねばしないなど）と
か表面に商品名、メーカ名などを印刷することが出来る
などの効果がある。Adhering the nonwoven fabrics 4a and 4b has advantages such as increased bending strength, convenience in handling (does not stick to hands, does not become sticky, etc.), and enables printing of product name, manufacturer's name, etc. on the surface.
又住宅の床などに使用する場合には他の構成部材に釘打
ちした９、ホチキスで止めたり、接着して或いは単にサ
ンドイッチ状に挿入して使用することが出来る。When used on the floor of a house, it can be used by nailing, stapling, gluing, or simply inserting into other structural members in the form of a sandwich.
更に転炉風砕スラグの混合率によってはカッターナイフ
などでＬｆ単に切断することも出来るので構造物の形状
に合せろことも出来る。Furthermore, depending on the mixing ratio of the blasted converter slag, Lf can be simply cut with a cutter knife or the like, so that it can be matched to the shape of the structure.
又転炉の風砕スラグはコストが安いばかりでな（Ｆｅ２
Ｏ，などの酸化鉄を多量に含有するからｆｉ電磁波遮蔽
効果、例えば高周波発振器から発する電磁波の漏洩を弱
めると言う副次的効果を有する。In addition, the cost of blasted slag from converters is low (Fe2
Since it contains a large amount of iron oxide such as O, it has a secondary effect of shielding fi electromagnetic waves, for example, weakening the leakage of electromagnetic waves emitted from a high frequency oscillator.
又制振、遮音の原理は周知であるが、此の発明にがかる
制振遮音シートは粘弾性を有するからこの材料の内部を
通過しようとする振動のエネルギーは内部摩擦によって
熱エネルギーに変換されて減衰する。Furthermore, the principles of vibration damping and sound insulation are well known, but since the vibration damping and sound insulation sheet according to this invention has viscoelasticity, the energy of vibrations that try to pass through the inside of this material is converted into thermal energy by internal friction. Attenuate.
更（こ、制振遮音シートの表面に接着する不＃ｌ布の材
質を選べば、耐熱性、難燃性、接着性、機械的強度を向
上させたり印刷も可能である。Furthermore, by selecting the material of the non-woven fabric that adheres to the surface of the vibration damping and sound insulating sheet, it is possible to improve heat resistance, flame retardancy, adhesiveness, mechanical strength, and print.
又上記第１図に示した混練シート４の添加剤としてタル
ク、石膏、高炉水砕スラグを５〜２０％加えて耐熱性を
向上させてもよい。Furthermore, 5 to 20% of talc, gypsum, or granulated blast furnace slag may be added as additives to the kneading sheet 4 shown in FIG. 1 to improve heat resistance.
更にバインダーとしては上記の外にブロンズアスファル
ト、アスファルトコンパウンド、ストレートアスファル
トを５〜３０％配合するようにしても良い。Furthermore, as a binder, bronze asphalt, asphalt compound, or straight asphalt may be blended in an amount of 5 to 30% in addition to the above.
又耐油性向上剤としてはシー１−の表面にΔｊ箔、ＰＥ
クロス、ガラスクロス、塩ビンートを設けろようにして
も良い。Also, as an oil resistance improver, Δj foil, PE
You may also provide a cloth, glass cloth, or salt bottle.
この発明は以上説明した通り、アスファルト又はゴムア
スファルト１０〜５０％転炉風砕スラブ９０〜５０％か
ら成る仮の片面又は両面に不織布をはり付けて制振防音
シートとしたので、ＪＩＳＡ１４１８による測定方法に
基づいてＪＩＳＡ１４１９によるしゃ音等級はＬ−６５
（軽５１ｍ撃音）とＬ−７０（重量闇撃音）を示して極
めて良好であるばかりか、原料は安価であるから製造原
価を低減し、又耐熱性、難燃性、接着性、耐油性、機械
的強度の良好なるシートを提供出来る効果がある。As explained above, in this invention, a vibration-damping and sound-insulating sheet is made by pasting a non-woven fabric on one or both sides of a provisional sheet made of asphalt or rubber asphalt 10-50% and converter blasted slab 90-50%, so the measurement method is according to JISA1418. Based on JISA1419, the sound rating is L-65.
(Light 51m impact sound) and L-70 (Heavy dark impact sound), not only is it extremely good, but the raw materials are inexpensive, reducing manufacturing costs, and it also has heat resistance, flame retardance, adhesiveness, and oil resistance. This has the effect of providing a sheet with good properties and mechanical strength.
第１図（ａ）、 （ｂ）はこの発明にかかろ（ａ）は施
工例の斜視図、（ｂｌは説明図、第２図はこの発明にか
かろシートの軽量衝撃音に対する特性を示す線図、第３
図はこの発明にかかるシートの重量衝撃音に対する特性
を示す線図である。
図において、１（よ梁、３はパーティクルボード、４は
混練シート、４ａは不織布、４ｂは不織布、５は制振遮
音シート、７ば合板である。
なお、各図中同一符号は同一または相当部分を示す。
代理人 弁理士 佐 藤 正 年
第１図
（ａ） （ｂ）１、Ｉｏ ：
＃ ９：
床 ４Ｌ Ｌ ＴＸ２ 小舅（１１篭豪イづ
＝」：４−τ３ ・ パーティフルホー）： １
３ 石膏ホード４ Ｓゴ米表 シート
１５ 石１トホ′−ド４０：；’ｌ 織布（ホ
６リエステル） １７ τう入フール４ｂ 丁
Ｈｋ：、〒（ボソエズデル）１９ 石１トホート５
弔’ＩＪ辰ぜ邑萱シート ２１ 、
石膏オて一ト“７ ： ＊ ｓｓ
２３ 璧イｘｚｘｓ床１噸２１１しＮル（
ｄＢンFigures 1 (a) and (b) are a perspective view of a construction example according to the present invention, (bl is an explanatory view, and Fig. 2 is a diagram showing the characteristics of the sheet according to the present invention against lightweight impact noise. , 3rd
The figure is a diagram showing the characteristics of the sheet according to the present invention against weight impact noise. In the figure, 1 (cross beam, 3 is particle board, 4 is a kneaded sheet, 4a is a non-woven fabric, 4b is a non-woven fabric, 5 is a vibration damping and sound insulating sheet, and 7 is plywood. In addition, the same reference numerals in each figure are the same or equivalent. The parts are shown below. Agent: Masaru Sato, Patent Attorney Figure 1 (a) (b) 1, Io:
#9:
Floor 4L L TX2 Koson (11 basket go Izu=': 4-τ3 ・Party full house): 1
3 Gypsum hoard 4 S Gome table sheet
15 Stone 1 tohod 40: ;'l Woven cloth (ho 6 liester) 17 τ intrusion fur 4b Ding Hk:,〒(Bosoezdel) 19 Stone 1 tohoto 5
Condolences 'IJ Tatsuze Ogaya Sheet 21,
Gypsum repair “7: * ss
23 Perfect xzxs floor 1 噸 211
dBn
Claims (3)
ァルトと添加剤を混練して板状に成形し表面に不織布等
の繊維を接着したことを特徴とする制振遮音シート。(1) A vibration-damping and sound-insulating sheet characterized by kneading converter blast slag, asphalt or rubber asphalt, and additives, forming it into a plate shape, and adhering fibers such as nonwoven fabric to the surface.
ムアスファルトとの混練率は転炉スラグ９０％〜５０％
で、残りはアスファルト又はゴムアスファルト及び添加
剤であることを特徴とする特許請求の範囲第１項記載の
制振遮音シート。(2) The kneading ratio of the above-mentioned blasted converter slag and the above-mentioned asphalt or rubber asphalt is 90% to 50% of the converter slag.
The vibration damping and sound insulating sheet according to claim 1, wherein the remainder is asphalt or rubber asphalt and additives.
Ａｌ箔、塩ビシート、ＰＥクロス等のシートであること
を特徴とする特許請求の範囲第１項記載の制振遮音シー
ト。(3) The above fibers are, for example, polyester, glass cloth,
The vibration-damping and sound-insulating sheet according to claim 1, wherein the sheet is made of Al foil, PVC sheet, PE cloth, or the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15630186A JPS6313738A (en) | 1986-07-04 | 1986-07-04 | Vibration-damping sound-insulating sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15630186A JPS6313738A (en) | 1986-07-04 | 1986-07-04 | Vibration-damping sound-insulating sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6313738A true JPS6313738A (en) | 1988-01-21 |
| JPH0465777B2 JPH0465777B2 (en) | 1992-10-21 |
Family
ID=15624817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15630186A Granted JPS6313738A (en) | 1986-07-04 | 1986-07-04 | Vibration-damping sound-insulating sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6313738A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0239043U (en) * | 1988-09-07 | 1990-03-15 | ||
| JP2014112204A (en) * | 2012-11-08 | 2014-06-19 | Nanao Kogyo Kk | Soundproof material, soundproof structure, and construction method of the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002070200A (en) * | 2000-08-30 | 2002-03-08 | Toyo Constr Co Ltd | Vibration control structure for building and construction method therefor |
| US20220020481A1 (en) | 2020-07-20 | 2022-01-20 | Abbott Laboratories | Digital pass verification systems and methods |
-
1986
- 1986-07-04 JP JP15630186A patent/JPS6313738A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0239043U (en) * | 1988-09-07 | 1990-03-15 | ||
| JP2014112204A (en) * | 2012-11-08 | 2014-06-19 | Nanao Kogyo Kk | Soundproof material, soundproof structure, and construction method of the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0465777B2 (en) | 1992-10-21 |
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