JP3152806B2 - Outer cylinder side rotating type melting furnace - Google Patents
Outer cylinder side rotating type melting furnaceInfo
- Publication number
- JP3152806B2 JP3152806B2 JP17192893A JP17192893A JP3152806B2 JP 3152806 B2 JP3152806 B2 JP 3152806B2 JP 17192893 A JP17192893 A JP 17192893A JP 17192893 A JP17192893 A JP 17192893A JP 3152806 B2 JP3152806 B2 JP 3152806B2
- Authority
- JP
- Japan
- Prior art keywords
- outer cylinder
- melted
- combustion chamber
- melting furnace
- inner cylinder
- 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.)
- Expired - Lifetime
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- Gasification And Melting Of Waste (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ごみ焼却灰、飛灰、粗
大ごみ不燃分、都市ごみ、下水汚泥、産業破棄物等を溶
融する溶融炉に係り、外筒側胴部が回転する外筒側胴部
回転式溶融炉に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a melting furnace for melting waste incineration ash, fly ash, bulky incombustibles, municipal waste, sewage sludge, industrial waste, etc., in which an outer cylinder-side body rotates. The present invention relates to a cylinder-side rotating rotary melting furnace.
【０００２】[0002]
【従来の技術】従来の溶融炉としては、例えば図２に示
すようなものがある。図２において、溶融炉１は同心状
に配置した外筒２と内筒３を有しており、外筒２と内筒
３の間には被溶融物４ａを充填する供給筒４を形成して
いる。外筒２は本体フレーム５に設けた受ローラ５ａで
軸心廻りに回転自在に支持しており、回転装置６が外筒
２を回転駆動する。また、内筒３は本体フレーム５に設
けた昇降装置７で昇降自在に支持している。さらに、内
筒３の下部には複数のバーナー８を有する炉天井部９を
設けており、炉天井部９の下方に主燃焼室１０を形成し
ている。2. Description of the Related Art As a conventional melting furnace, for example, there is one shown in FIG. In FIG. 2, a melting furnace 1 has an outer cylinder 2 and an inner cylinder 3 which are arranged concentrically, and a supply cylinder 4 for filling a material to be melted 4a is formed between the outer cylinder 2 and the inner cylinder 3. ing. The outer cylinder 2 is rotatably supported around an axis by a receiving roller 5 a provided on the main body frame 5, and a rotating device 6 drives the outer cylinder 2 to rotate. The inner cylinder 3 is supported by a lifting device 7 provided on the main body frame 5 so as to be able to move up and down. Further, a furnace ceiling 9 having a plurality of burners 8 is provided below the inner cylinder 3, and a main combustion chamber 10 is formed below the furnace ceiling 9.
【０００３】外筒２の底部にはスラグポート１２を設け
ており、スラグポート１２の下部には二次燃焼室１３を
形成する二次燃焼部１４を設けている。さらに、二次燃
焼部１４に二次燃焼バーナ１５を設けるとともに、二次
燃焼室１３に連通して煙道１６を設けている。また、二
次燃焼室１３の下方にはスラグピット１７およびスラグ
コンベア１８からなるスラグ排出装置を設けている。[0003] A slag port 12 is provided at the bottom of the outer cylinder 2, and a secondary combustion section 14 forming a secondary combustion chamber 13 is provided below the slag port 12. Further, a secondary combustion burner 15 is provided in the secondary combustion section 14, and a flue 16 is provided in communication with the secondary combustion chamber 13. Further, a slag discharge device including a slag pit 17 and a slag conveyor 18 is provided below the secondary combustion chamber 13.
【０００４】そして、上述の構成では、バーナ８による
燃料の燃焼熱および被溶融物４ａそれ自身の燃焼熱によ
り主燃焼室１０に対面する表層の被溶融物４ａが溶融
し、溶融した溶融スラグが二次燃焼室１３を通ってスラ
グピット１７に滴下し、スラグピット１７に貯留した冷
却水によって冷却固化され、スラグコンベア１８で排出
される。また、表層の被溶融物４ａの溶融および内筒３
の回転によって内筒３の周囲に堆積する被溶融物４ａが
新たに主燃焼室１０内に切り出される。この被溶融物４
ａの切り出しは、内筒３の下端に設けた切出羽根（図示
せず）による炉内への掻き込み作用と、外筒２と一体に
回転移動する被溶融物４ａが固定した内筒３から受ける
摩擦剪断力によるくずれ作用とによって行っている。[0004] In the above-described configuration, the surface of the molten material 4a facing the main combustion chamber 10 is melted by the heat of combustion of the fuel by the burner 8 and the combustion heat of the molten material 4a itself. It is dropped into the slag pit 17 through the secondary combustion chamber 13, cooled and solidified by the cooling water stored in the slag pit 17, and discharged by the slag conveyor 18. Further, the melting of the material to be melted 4a on the surface layer and the inner cylinder 3 are performed.
The melted material 4 a that accumulates around the inner cylinder 3 is newly cut into the main combustion chamber 10 by the rotation of. This melt 4
a is cut out by a cutting blade (not shown) provided at the lower end of the inner cylinder 3, and the inner cylinder 3 to which the molten material 4 a rotating and moving integrally with the outer cylinder 2 is fixed. This is achieved by the collapsing action of friction shear force received from the body.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記した従来
の構成においては、回転装置６によって回転させる重量
が外筒２および外筒２に投入した被溶融物４ａの全体と
なる。このため、外筒２の回転駆動に要する駆動力およ
び受ローラ５ａに加わる荷重が大きくなり、回転装置６
および受ローラ５ａを含む回転支持機構が大型化する問
題があった。However, in the above-described conventional configuration, the weight rotated by the rotating device 6 is the entire outer cylinder 2 and the molten material 4a charged into the outer cylinder 2. For this reason, the driving force required for rotationally driving the outer cylinder 2 and the load applied to the receiving roller 5a increase, and the rotating device 6
In addition, there is a problem that the rotation supporting mechanism including the receiving roller 5a becomes large.
【０００６】また、被溶融物４ａの切り出しに際し、切
出羽根（図示せず）による炉内への掻き込み作用のみな
らず、外筒２と一体に回転移動する被溶融物４ａと固定
した内筒３との間の摩擦剪断力によるくずれ作用が起こ
るので、一度に多量の被溶融物４ａが崩れ落ちて供給量
に乱れが生じ、炉内へ供給する被溶融物４ａの供給量の
定量性が不安定となる問題があった。Further, when cutting out the molten material 4a, not only the scraping action of the cutting blades (not shown) into the furnace, but also the molten material 4a, which rotates integrally with the outer cylinder 2, is fixed. Since the collapsing action due to the frictional shearing force with the cylinder 3 occurs, a large amount of the molten material 4a collapses at once, causing a disturbance in the supply amount, and the quantitativeness of the supply amount of the molten material 4a supplied into the furnace is reduced. There was a problem of instability.
【０００７】本発明は上記課題を解決するもので、被溶
融物の切り出しを小さな動力で、かつ定量的に行うこと
ができる外筒側胴部回転式溶融炉を提供することを目的
とする。An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an outer cylinder-side rotating rotary melting furnace which can cut out a material to be melted with small power and quantitatively.
【０００８】[0008]
【課題を解決するための手段】上記した課題を解決する
ために、本発明の外筒側胴部回転式溶融炉は、内筒と外
筒を同心状に配置するとともに、内筒と外筒の間に被溶
融物を充填し、内筒に設けた炉天井部の下方に被溶融物
によって囲まれた主燃焼室を形成する溶融炉において、
内筒の下端部に被被溶融物を主燃焼室に掻き込む複数の
切出羽根を設け、外筒を上部の外筒側胴部と下部の外筒
底部に分割形成し、外筒側胴部を軸心廻りに回転自在に
設け、外筒側胴部の内側面に外筒の径方向に突出して被
溶融物を支持する支持板を設けた構成としたものであ
る。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an outer cylinder-side rotatable melting furnace according to the present invention has an inner cylinder and an outer cylinder which are concentrically arranged, and an inner cylinder and an outer cylinder. In the melting furnace, which is filled with the material to be melted and forms a main combustion chamber surrounded by the material to be melted below the furnace ceiling provided in the inner cylinder,
At the lower end of the inner cylinder, a plurality of materials are scraped into the main combustion chamber.
A cutting blade is provided, the outer cylinder is divided into an upper outer cylinder side body and a lower outer cylinder bottom, and the outer cylinder side body is rotatably provided around an axis, and the inner surface of the outer cylinder side body is provided. And a support plate that protrudes in the radial direction of the outer cylinder and supports the material to be melted.
【０００９】[0009]
【作用】上記した構成により、回転装置によって外筒側
胴部を回転させると、外筒底部は回転しないので、支持
板上に載った被溶融物のみが外筒側胴部と一体に回転
し、支持板に支持されない被溶融物は外筒底部と共に回
転せずに固定した状態に留まる。このため、固定した内
筒は支持板上に載った被溶融物対してのみ相対的に移動
し、外筒底部に載った被溶融物に対して摩擦剪断力を及
ばさないので、支持板に支持されて外筒側胴部と一体に
回転する被溶融物のみが内筒に設けた切出羽根によって
主燃焼室に向けて切り出され、外筒底部に載った被溶融
物が不要に崩れないので、被溶融物の供給量の定量性を
確保することができる。また、回転装置および受ローラ
等の回転支持機構等に加わる負荷を軽減して回転装置お
よび回転支持機構の簡略化を図ることができる。According to the above construction, when the outer cylinder body is rotated by the rotating device, the outer cylinder bottom does not rotate, so that only the material to be melted on the support plate rotates integrally with the outer cylinder body. On the other hand, the material to be melted not supported by the support plate remains fixed without rotating with the bottom of the outer cylinder. For this reason, the fixed inner cylinder moves relatively only with respect to the melt placed on the support plate, and does not exert frictional shearing force on the melt placed on the bottom of the outer cylinder. Only the molten material that is supported and rotates integrally with the outer cylinder side body is cut out toward the main combustion chamber by the cutting blade provided in the inner cylinder, so that the molten material placed on the outer cylinder bottom does not unnecessarily collapse. Therefore, the quantitativeness of the supply amount of the molten material can be ensured. Further, the load applied to the rotation support mechanism such as the rotation device and the receiving roller can be reduced, and the rotation device and the rotation support mechanism can be simplified.
【００１０】[0010]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。図１において、溶融炉２１は同心状に配置した
外筒２２と内筒２３を有しており、外筒２２と内筒２３
の間には被溶融物２４ａを充填する供給筒２４を形成し
ている。内筒２３は本体フレーム２５に設けた昇降装置
２６で高さ調整可能に支持しており、内筒２３の下部に
は炉天井部２７を設けている。炉天井部２７は頂部もし
くは天井部に主燃焼バーナ２８を有し、外筒２２との間
に主燃焼室２９を形成している。また、内筒２３の下端
部には複数の切出羽根３０を設けており、切出羽根３０
は被溶融物２４ａを主燃焼室２９に向けて掻き込むもの
である。An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a melting furnace 21 has an outer cylinder 22 and an inner cylinder 23 arranged concentrically.
Between them, a supply cylinder 24 for filling the material 24a to be melted is formed. The inner cylinder 23 is supported so as to be adjustable in height by an elevating device 26 provided on the main body frame 25, and a furnace ceiling 27 is provided below the inner cylinder 23. The furnace ceiling 27 has a main combustion burner 28 at the top or the ceiling, and forms a main combustion chamber 29 with the outer cylinder 22. A plurality of cutting blades 30 are provided at the lower end of the inner cylinder 23.
Is for scraping the melt 24a toward the main combustion chamber 29.
【００１１】外筒２２は上部の外筒側胴部２２ａと下部
の外筒底部２２ｂに分割形成しており、外筒底部２２ｂ
を本体フレーム２５で固定支持するとともに、外筒側胴
部２２ａを軸心廻りに回転自在に、かつ高さ調整可能に
設けている。The outer cylinder 22 is divided into an upper outer cylinder side body 22a and a lower outer cylinder bottom 22b.
Is fixedly supported by the main body frame 25, and the outer cylinder side body portion 22a is provided so as to be rotatable around the axis and adjustable in height.
【００１２】外筒側胴部２２ａは外周に環状の台座部３
１を有し、本体フレーム２５に設けた受ローラ２５ａが
台座部３１を介して外筒側胴部２２ａを回転自在に支持
しており、外筒側胴部２２ａの内周面には半径方向に突
出して被溶融物２４ａを支持する支持板３２を設けてい
る。支持板３２は一枚の円板状に形成しても良いし、複
数に分割して設けても良い。また、本体フレーム２５に
は台座部３１を介して外筒側胴部２２ａを回転駆動する
回転装置３３を設けている。さらに、内筒２３の上部外
周には外筒側胴部２２ａの上部開口を覆う蓋部３４を設
けている。The outer cylinder side body 22a has an annular pedestal 3 around its outer periphery.
1, a receiving roller 25a provided on the main body frame 25 rotatably supports the outer cylinder side body 22a via the pedestal 31. The inner peripheral surface of the outer cylinder side body 22a has a radial direction. And a support plate 32 that protrudes to support the material to be melted 24a. The support plate 32 may be formed in a single disk shape or may be divided into a plurality of pieces. In addition, the main body frame 25 is provided with a rotation device 33 that rotates the outer cylinder side body portion 22a via the pedestal portion 31. Further, a lid portion 34 is provided on the outer periphery of the upper portion of the inner cylinder 23 to cover the upper opening of the outer cylinder side body portion 22a.
【００１３】外筒底部２２ｂはスラグポート３７を有
し、スラグポート３７の周囲に冷却ジャケット３８を備
えている。外筒底部２２ｂの下方には二次燃焼部３９を
設けており、二次燃焼部３９にはスラグポート３７に連
通する二次燃焼室４０を形成している。また、二次燃焼
部３９には二次燃焼バーナ４１を設けており、二次燃焼
室４０の下方にスラグ排出装置４２を配置するととも
に、二次燃焼室４０に連通して二次煙道４３を形成して
いる。The outer cylinder bottom 22b has a slag port 37 and a cooling jacket 38 around the slag port 37. A secondary combustion section 39 is provided below the outer cylinder bottom 22b, and a secondary combustion chamber 40 communicating with the slag port 37 is formed in the secondary combustion section 39. Further, a secondary combustion burner 41 is provided in the secondary combustion section 39, and a slag discharge device 42 is disposed below the secondary combustion chamber 40, and the secondary flue 43 is communicated with the secondary combustion chamber 40. Is formed.
【００１４】以下、上記した構成における作用を説明す
る。主燃焼室２９においては、主燃焼バーナ２８による
燃料の燃焼熱および被溶融物の自燃焼熱によって、主燃
焼室２９に対面する被溶融物２４ａの表層部が溶融し、
溶融した溶融スラグがスラグポート３７および二次燃焼
室３９を通ってスラグ排出装置４２に落下する。また、
主燃焼室２９の排ガスはスラグポート３７を通って二次
燃焼室３９に流入し、二次燃焼室３９において排ガス中
の未燃ガスが二次燃焼バーナ４１によって燃焼させられ
る。最終的に排ガスは二次煙道４０を通って処理系に流
出する。The operation of the above configuration will be described below. In the main combustion chamber 29, the surface layer of the melt 24a facing the main combustion chamber 29 is melted by the heat of combustion of the fuel by the main combustion burner 28 and the self-combustion heat of the melt.
The molten slag falls through the slag port 37 and the secondary combustion chamber 39 to the slag discharge device 42. Also,
The exhaust gas of the main combustion chamber 29 flows into the secondary combustion chamber 39 through the slag port 37, and the unburned gas in the exhaust gas is burned by the secondary combustion burner 41 in the secondary combustion chamber 39. Finally, the exhaust gas flows out to the treatment system through the secondary flue 40.
【００１５】一方、回転装置３３により台座部３１を介
して外筒側胴部２２ａを軸心廻りに回転駆動し、被溶融
物２４ａの供給を行う。つまり、外筒側胴部２２ａを回
転させると、外筒底部２４ｂは回転しないので、支持板
３２上に載った被溶融物２４ａのみが外筒側胴部２２ａ
と一体に回転し、支持板３２に支持されない被溶融物２
４ａは外筒底部２２ｂと共に回転せずに固定した状態に
留まる。On the other hand, the outer cylinder side body 22a is rotated around the axis by the rotation device 33 via the pedestal 31 to supply the melt 24a. That is, when the outer cylinder side body portion 22a is rotated, the outer cylinder bottom portion 24b does not rotate, so that only the material to be melted 24a placed on the support plate 32 becomes the outer cylinder side body portion 22a.
To be melted 2 not supported by the support plate 32
4a stays fixed without rotating with the outer cylinder bottom 22b.
【００１６】このため、固定した内筒２３は支持板３２
上に載った被溶融物対２４ａしてのみ相対的に移動し、
外筒底部２２ｂに載った被溶融物２４ａに対して摩擦剪
断力を及ばさないので、支持板３２に支持されて外筒側
胴部２２ａと一体に回転する被溶融物２４ａのみが内筒
２３に設けた切出羽根３０によって主燃焼室２９に向け
て切り出され、外筒底部２２ｂに載った被溶融物２４ａ
が不要に崩れないので、被溶融物２４ａの供給量の定量
性を確保することができ、外筒側胴部２２ａの回転数の
変更よる被溶融物２４ａの供給量の制御性が向上する。For this reason, the fixed inner cylinder 23 is
It moves relatively only as the melted object pair 24a placed on the
Since no frictional shearing force is exerted on the melt 24a placed on the outer cylinder bottom 22b, only the melt 24a supported by the support plate 32 and rotated integrally with the outer cylinder side body 22a is the inner cylinder 23. The material 24a cut out toward the main combustion chamber 29 by the cutting blade 30 provided on the outer cylinder bottom 22b.
Is not collapsed unnecessarily, the quantitativeness of the supply amount of the melt 24a can be secured, and the controllability of the supply amount of the melt 24a by changing the rotation speed of the outer cylinder side body 22a is improved.
【００１７】また、台座部３１および受ローラ２５ａに
よって構成する回転支持機構に加わる負荷は、外筒側胴
部２２ａの自重量および支持板３２で支持する被溶融物
２４ａのみの重量となり、回転支持機構および回転装置
３３に加わる負荷が小さくなるので、装置の簡略化を図
れる。また、逆に容量の大型化を容易に行うことができ
る。さらに、スラグポート３７および冷却ジャケット３
８が回転しないので強制循環冷却方式とすることがで
き、冷却ジャケット３８の構造の簡略化を図ることがで
きる。The load applied to the rotation support mechanism constituted by the pedestal portion 31 and the receiving roller 25a is the weight of the outer cylinder side body portion 22a and the weight of only the material to be melted 24a supported by the support plate 32. Since the load applied to the mechanism and the rotating device 33 is reduced, the device can be simplified. Conversely, the capacity can be easily increased. Further, the slag port 37 and the cooling jacket 3
8 does not rotate, so that a forced circulation cooling system can be used, and the structure of the cooling jacket 38 can be simplified.
【００１８】[0018]
【発明の効果】以上述べたように本発明によれば、内筒
は外筒底部に載った被溶融物に対して摩擦剪断力を及ぼ
さず、支持板に支持されて外筒側胴部と一体に回転する
被溶融物のみが内筒に設けた切出羽根によって主燃焼室
に向けて切り出され、外筒底部に載った被溶融物が不要
に崩れないので、被溶融物の供給量の定量性を確保する
ことができる。また、回転装置および受ローラ等の回転
支持機構等に加わる負荷を軽減して回転装置および回転
支持機構の簡略化を図ることができる。As described above, according to the present invention, the inner cylinder does not exert any frictional shearing force on the melt placed on the bottom of the outer cylinder, and is supported by the support plate to be in contact with the outer cylinder side trunk. Only the melt that rotates integrally is cut out toward the main combustion chamber by the cutting blade provided in the inner cylinder, and the melt placed on the bottom of the outer cylinder does not unnecessarily collapse. Quantitative properties can be ensured. Further, the load applied to the rotation support mechanism such as the rotation device and the receiving roller can be reduced, and the rotation device and the rotation support mechanism can be simplified.
【図１】本発明の一実施例における溶融炉の全体断面図
である。FIG. 1 is an overall sectional view of a melting furnace according to an embodiment of the present invention.
【図２】従来の溶融炉の全体断面図である。FIG. 2 is an overall sectional view of a conventional melting furnace.
２２ 外筒 ２２ａ 外筒側胴部 ２２ｂ 外筒底部 ２３ 内筒 ２４ａ 被溶融物 ２５ａ 受ローラ ３０ 切出羽根 ３１ 台座部 ３２ 支持板 ３３ 回転装置 Reference Signs List 22 outer cylinder 22a outer cylinder side body part 22b outer cylinder bottom part 23 inner cylinder 24a material to be melted 25a receiving roller 30 cutting blade 31 pedestal part 32 support plate 33 rotating device
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F23G 5/00 F23G 5/24 - 5/28 F23G 7/00 F23J 1/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) F23G 5/00 F23G 5/24-5/28 F23G 7/00 F23J 1/00
Claims (1)
に、内筒と外筒の間に被溶融物を充填し、内筒に設けた
炉天井部の下方に被溶融物によって囲まれた主燃焼室を
形成する溶融炉において、内筒の下端部に被被溶融物を
主燃焼室に掻き込む複数の切出羽根を設け、外筒を上部
の外筒側胴部と下部の外筒底部に分割形成し、外筒側胴
部を軸心廻りに回転自在に設け、外筒側胴部の内側面に
外筒の径方向に突出して被溶融物を支持する支持板を設
けたことを特徴とする外筒側胴部回転式溶融炉。An inner cylinder and an outer cylinder are concentrically arranged, a material to be melted is filled between the inner cylinder and the outer cylinder, and the material is surrounded by a material below a furnace ceiling provided in the inner cylinder. In the melting furnace that forms the main combustion chamber, the material to be melted is placed at the lower end of the inner cylinder.
Providing a plurality of cutting blades that rake into the main combustion chamber, forming the outer cylinder separately on the upper outer cylinder body and the lower outer cylinder bottom , and providing the outer cylinder body rotatably around the axis, On the inner surface of the outer cylinder side trunk
An outer cylinder-side rotatable melting furnace, comprising a support plate projecting in a radial direction of an outer cylinder and supporting a material to be melted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17192893A JP3152806B2 (en) | 1993-07-13 | 1993-07-13 | Outer cylinder side rotating type melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17192893A JP3152806B2 (en) | 1993-07-13 | 1993-07-13 | Outer cylinder side rotating type melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0727308A JPH0727308A (en) | 1995-01-27 |
| JP3152806B2 true JP3152806B2 (en) | 2001-04-03 |
Family
ID=15932442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17192893A Expired - Lifetime JP3152806B2 (en) | 1993-07-13 | 1993-07-13 | Outer cylinder side rotating type melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3152806B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101785652B1 (en) * | 2010-05-06 | 2017-10-16 | 엘지전자 주식회사 | Touch panel and mobile terminal comprising the same |
-
1993
- 1993-07-13 JP JP17192893A patent/JP3152806B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101785652B1 (en) * | 2010-05-06 | 2017-10-16 | 엘지전자 주식회사 | Touch panel and mobile terminal comprising the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0727308A (en) | 1995-01-27 |
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