JPH0619554Y2 - Tilting device - Google Patents
Tilting deviceInfo
- Publication number
- JPH0619554Y2 JPH0619554Y2 JP8427089U JP8427089U JPH0619554Y2 JP H0619554 Y2 JPH0619554 Y2 JP H0619554Y2 JP 8427089 U JP8427089 U JP 8427089U JP 8427089 U JP8427089 U JP 8427089U JP H0619554 Y2 JPH0619554 Y2 JP H0619554Y2
- Authority
- JP
- Japan
- Prior art keywords
- cooling container
- tilting
- steel slag
- cooling
- tilting device
- 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
Links
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- Furnace Details (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、製銑、製鋼工程から発生する各種鋼滓を冷却
容器内で冷却固化させた後、鋼滓を排出する際に使用す
る傾転装置に関する。[Detailed Description of the Invention] (Industrial field of application) The present invention is intended for use in discharging a steel slag after cooling and solidifying various steel slag generated from a pig iron and steel making process in a cooling container. Regarding the turning device.
（従来技術） 製銑、製鋼工程から発生する各種鋼滓、例えば、転炉に
発生する転炉滓の一般的な処理は、転炉から排滓された
転炉滓を滓鍋台車で受滓し、溶滓畠に排出して法冷する
ようにし、又連鋳設備等で発生する鋼滓の処理は、取鍋
から排出される鋼滓を鋼滓容器で受滓し、固化鋼滓処理
箇所まで移動過程で冷却固化させ、前記固化鋼滓処理箇
所で当該鋼滓容器を傾転装置により傾転させて固化鋼滓
処理箇所内へ排出するようにしている。(Prior Art) Various types of steel slag generated in the ironmaking and steelmaking processes, for example, a general treatment of a converter slag generated in a converter is to receive the converter slag discharged from the converter in a slag pan truck. However, the steel slag discharged from the ladle is received in the steel slag container, and the solidified steel slag is processed by discharging the slag from the ladle into the molten slag for legal cooling. It is configured such that it is cooled and solidified in a moving process to a point, and the steel slag container is tilted by a tilting device at the solidified steel slag treatment location and discharged into the solidified steel slag treatment location.
以上のように製銑、製鋼工程から発生する各種鋼滓は、
滓鍋台車又は鋼滓容器内に受滓し、これらを移動させつ
ゝ前記鋼滓を冷却固化させた後、処理工程に於いて排出
するが、この時上記滓鍋台車又は鋼滓容器を傾転させる
傾転装置を利用している。As described above, various types of steel slag generated from the ironmaking and steelmaking processes are
The slag pan trolley or steel slag container is received and moved to cool and solidify the steel slag, which is then discharged in the treatment process. At this time, the slag pan trolley or steel slag container is tilted. It uses a tilting device to rotate.
従来の傾転装置、特に、鋼滓容器（以下、冷却容器と言
う。）の傾転装置としては、実開・昭５８−３１２５５
号公報に示される傾転装置（同公報では転回装置として
表示されているが、こゝでは傾転装置と言う。）が提案
されている。As a conventional tilting device, in particular, a tilting device for a steel slag container (hereinafter referred to as a cooling container), there is a practically-developed sho 58-31255.
There is proposed a tilting device (which is shown as a turning device in the same publication, but is referred to as a tilting device here).
上記先願例の傾転装置は、同公報に示される通り、冷却
容器内で冷却凝固させた転炉スラグを当該冷却容器から
取り出す為に冷却容器を載置し、転回する傾転機構と、
冷却容器を上記傾転機構に固定する為の固定機構と、取
り出し時に発生する粉塵を集塵する覆いとフードとを備
えた構成であり、転炉から排滓された転炉滓を受滓した
冷却容器を天井クレーンで傾転装置の設置位置まで横吊
持して移動させ、それを前記傾転装置に固定した後、当
該傾転装置によって上記冷却容器を傾転させ、冷却容器
内の転炉滓を排出し、排出後、再び天井クレーンで横吊
持して元位置まで搬送する。The tilting device of the prior application example is, as shown in the same publication, a tilting mechanism for placing and cooling the cooling container in order to take out the converter slag cooled and solidified in the cooling container from the cooling container,
It has a fixing mechanism for fixing the cooling container to the tilting mechanism, a cover and a hood for collecting dust generated at the time of taking out, and receives the converter slag discharged from the converter. The cooling container is laterally hung and moved to the installation position of the tilting device by an overhead crane, fixed to the tilting device, and then the cooling device is tilted by the tilting device to transfer the cooling container inside. The furnace slag is discharged, and after discharging it, it is horizontally suspended again by an overhead crane and transported to the original position.
集塵フードは可搬式構造とされ、傾転装置によって上記
冷却容器を傾転させる際には上記傾転装置を覆う位置ま
で移動されるが、冷却容器を傾転装置に固定する際及び
冷却容器内の転炉滓を排出し、排出後、再び天井クレー
ンで横吊持して元位置まで搬送する際には上記の作業に
支障のない位置まで退避させている。The dust collecting hood has a portable structure and is moved to a position covering the tilting device when the cooling container is tilted by the tilting device, but when the cooling container is fixed to the tilting device and the cooling container When the converter slag inside is discharged, and after it is discharged, it is evacuated to a position where it does not hinder the above work when it is horizontally hung again by an overhead crane and transported to the original position.
（考案が解決しようとする課題） 前述の如く、上記従来の傾転装置では使用されている傾
転装置に固定する冷却容器を天井クレーンで横吊持し、
所定の位置まで移動させるが、上記冷却容器は大重量物
である為、大型の天井クレーンが必要となる上にそれを
敷設する建屋も大きくなる。(Problems to be Solved by the Invention) As described above, the cooling container to be fixed to the tilting device used in the above-described conventional tilting device is horizontally hung by the overhead crane,
Although it is moved to a predetermined position, since the cooling container is a heavy object, a large overhead crane is required and a building for laying it becomes large.
また、冷却容器内の転炉滓を排出する際に発生する粉塵
の集塵設備は、転炉滓の排出時には転回装置を覆う位置
まで移動させ、その他の作業時にはその位置から退避さ
せているので、各々の作業工程に応じて移動させなけれ
ばならない。In addition, the dust collection equipment for dust generated when discharging the converter slag in the cooling container is moved to a position that covers the turning device when discharging the converter slag, and is retracted from that position during other work. , Must be moved according to each work process.
この為、従来の傾転装置では、冷却容器の傾転装置まで
の移行、傾転装置への固定、冷却容器内の転炉滓の排
出、排出後の元位置までの移行等々の各工程が複雑であ
ると言う問題がある。Therefore, in the conventional tilting device, each process such as transfer of the cooling container to the tilting device, fixing to the tilting device, discharge of the converter slag in the cooling container, transfer to the original position after discharge, etc. The problem is that it is complicated.
（課題を解決する為の手段） 本考案は製銑、製鋼工程から発生する各種鋼滓を冷却容
器内で冷却固化させた後、鋼滓を排出する際に使用する
傾転装置に、前記冷却容器を傾転可能に載置した冷却容
器搬送台車と、該冷却容器搬送台車に載置された冷却容
器を傾転させるための傾転機構と、該傾転機構により傾
転される冷却容器から排出される鋼滓の粉塵を集塵する
開口部を有する固定フードと集塵ダクト並びに集塵フー
ドとで構成される固定型集塵機構とを具備した構成を採
用し、前記課題の解決を図った。(Means for Solving the Problems) The present invention is applied to a tilting device used when discharging various types of steel slag generated from the ironmaking and steelmaking processes by cooling and solidifying in the cooling container. From a cooling container carrier that mounts the container in a tiltable manner, a tilting mechanism that tilts the cooling container that is mounted on the cooling container carrier, and a cooling container that tilts by the tilting mechanism. The above problem was solved by adopting a configuration including a fixed hood having an opening for collecting the dust of the discharged steel slag, a fixed dust collecting mechanism including a dust collecting duct and a dust collecting hood. .
（作用） 本考案の装置によれば、冷却容器は搬送台車上に載置
し、且つその搬送台車上で傾転可能な構成にしたので当
該冷却容器が大重量物であってもその移動に何ら支障が
なく、又上記冷却容器の傾転機構は、冷却容器を排出す
る際に当該冷却容器を傾転させる位置に設置したので、
大型の天井クレーンは不要となった。(Operation) According to the device of the present invention, the cooling container is placed on the carrier and can be tilted on the carrier, so that even if the cooling container is a heavy object, it cannot be moved. Since there is no hindrance, and the tilting mechanism of the cooling container is installed at a position where the cooling container is tilted when the cooling container is discharged,
A large overhead crane is no longer needed.
また、冷却容器内の転炉滓を排出する際に発生する粉塵
の集塵機構は、冷却容器内から転炉滓を排出する箇所に
固定した構成としたので、従来装置のように移動させる
必要がなくなった。Further, since the dust collection mechanism for dust generated when discharging the converter slag in the cooling container is fixed to the place where the converter slag is discharged from the inside of the cooling container, it is necessary to move it like a conventional device. lost.
（実施例） 以下、本考案の実施例に係る冷却容器の傾転装置を第１
図の側面図に基づき説明する。(Embodiment) A tilting device for a cooling container according to an embodiment of the present invention will be described below.
Description will be given based on a side view of the drawing.
符号Ａは後述する冷却容器の傾転機構、符号Ｂは冷却容
器内の鋼滓を排出する際に発生する粉塵の集塵機構及び
符号Ｃは冷却容器の搬送台車を各々示す。Reference symbol A indicates a tilting mechanism of the cooling container, which will be described later, reference symbol B indicates a dust collecting mechanism of dust generated when the steel slag in the cooling container is discharged, and reference symbol C indicates a carrier of the cooling container.
冷却容器の傾転機構Ａは、鋼滓を排出する箇所に固定し
た集塵機構Ｂに対する位置に設置されるが、その詳細構
造は基礎上に敷設した台車(1)端の支軸(1a)にブーム(2)
の下端を揺転自在に枢着し、その上端に設けた支軸(2a)
に後述する冷却容器の傾転用金具に掛合させるフック
(4)を先端に取付けたアーム(3)を揺転自在に枢着し、前
記ブーム(2)と前記基台(1)間には当該ブーム(2)を揺転
させるブーム用油圧シリンダー(5)を取付ける他、前記
ブーム(2)とアーム(3)間には当該アーム(3)を揺転させ
るアーム用油圧シリンダー(6)を取付けた構成とし、同
図一点鎖線の如く揺転するものである。The tilting mechanism A of the cooling container is installed at a position relative to the dust collecting mechanism B fixed to the place where the steel slag is discharged. Its detailed structure is on the spindle (1a) at the end of the trolley (1) laid on the foundation. Boom (2)
The lower end of the shaft is swingably attached, and the support shaft (2a) provided on the upper end
Hook to engage with the tilting fitting of the cooling container described later in
An arm (3) having (4) attached at its tip is pivotally pivoted so that the boom (2) is rocked between the boom (2) and the base (1). In addition to mounting 5), a hydraulic cylinder (6) for swinging the arm (3) is installed between the boom (2) and the arm (3), and swings as shown by the dashed line in the figure. It is a thing.
尚、符号(10a)(10b)(10c)(10d)は前記油圧シリンダー
(5)(6)の支持軸である。The reference numerals (10a) (10b) (10c) (10d) are the hydraulic cylinders.
(5) It is the support shaft of (6).
集塵機構Ｂは、一部開口部(94)を有する固定フード(91)
に集塵ダクト(92)と集塵フード(93)とで構成した固定式
の集塵機構本体(9)とし、前記固定フード(91)の下端に
後述する搬送台車の転倒防止用ストッパー(95)を設けた
構成にしてある。The dust collecting mechanism B includes a fixed hood (91) having a partial opening (94).
A fixed type dust collecting mechanism body (9) composed of a dust collecting duct (92) and a dust collecting hood (93) is provided, and a stopper (95) for preventing the carrier cart from overturning is provided at the lower end of the fixed hood (91). Is provided.
冷却容器の搬送台車Ｃは、基礎上に敷設された軌条Ｒ上
を走行する車輪(81)付搬送台車本体(8)と当該搬送台車
本体(8)上に載置される冷却容器(7)とで構成され、これ
ら冷却容器(7)と搬送台車本体(8)とは、各々の側端に設
けた金具(71)(82)とを支持ピン(12)により傾転可能に枢
着されている。The transport vehicle C for the cooling container comprises a transport vehicle main body (8) with wheels (81) traveling on a rail R laid on a foundation and a cooling container (7) mounted on the transport vehicle main body (8). The cooling container (7) and the carriage body (8) are pivotally attached by means of support pins (12) to metal fittings (71) and (82) provided at their respective side ends. ing.
尚、符号(11)は前記冷却容器(7)の側端（図では右側
端）に設置した傾転用吊り金具であって、前記傾転機構
Ａのアーム(3)先端のフック(4)と掛合し、当該アーム
(3)の揺転作用によって冷却容器(7)を傾転させ、冷却容
器(7)から鋼滓を前記集塵機構Ｂ内へ排出する。Reference numeral (11) is a tilting hanging metal fitting installed at a side end (right end in the figure) of the cooling container (7), and is a hook (4) at the tip of the arm (3) of the tilting mechanism A. Interlock and the arm
The cooling container (7) is tilted by the rocking action of (3), and the steel slag is discharged from the cooling container (7) into the dust collecting mechanism B.
本考案装置の構成は以上の通りであるが、次ぎにその作
動を説明する。The structure of the device of the present invention is as described above. Next, the operation will be described.
取鍋から排出される鋼滓を受滓した冷却容器(7)を搬送
台車本体(8)上に載置すると共に前記金具(71)前記金具
(82)とを支持ピン(12)を介して繋合固定した搬送台車Ｃ
を移動させ、前記集塵機構Ｂのある位置で停止させる。The cooling container (7) receiving the steel slag discharged from the ladle is placed on the carrier body (8), and the metal fittings (71) and the metal fittings are also attached.
Carrier C in which (82) and (82) are connected and fixed via support pins (12)
Is moved and stopped at a position where the dust collecting mechanism B is provided.
搬送台車Ｃの停止後、傾転機構Ａのブーム(2)とアーム
(3)とを各油圧シリンダー(5)(6)の作動により若干揺転
させ、アーム(3)先端のフック(4)を冷却容器(7)の傾転
用吊り金具(11)に手動或いは自動で繋合する。After the carriage C stops, the boom (2) and arm of the tilting mechanism A
(3) is slightly rocked by the operation of each hydraulic cylinder (5) (6), and the hook (4) at the end of the arm (3) is manually or automatically attached to the tilting hanging metal fitting (11) of the cooling container (7). Connect with.
その後、上記各油圧シリンダー(5)(6)を作動させて上記
ブーム(2)とアーム(3)とを図示の如く揺転させ、上記冷
却容器(7)を支持ピン(12)を中心とする円弧軌道（図中
矢示方向）に沿って前記固定フード(91)中に向けて傾転
させる。After that, the hydraulic cylinders (5) and (6) are operated to rock the boom (2) and the arm (3) as shown in the drawing, and the cooling container (7) is centered on the support pin (12). It is tilted toward the inside of the fixed hood (91) along a circular arc trajectory (direction indicated by an arrow in the figure).
この時、傾転機構Ａのブーム(2)とアーム(3)とを各油圧
シリンダー(5)(6)は各々図外の油圧回路に設けられたサ
ーボ弁によって自動制御され、適正な作動を行うように
設計されている。At this time, the boom (2) and arm (3) of the tilting mechanism A are automatically controlled by the servo valves provided in the hydraulic circuits (not shown) in the hydraulic cylinders (5) and (6), respectively, to ensure proper operation. Designed to do.
以上のようにして傾転された冷却容器(7)内の鋼滓は傾
転角度約110゜で当該冷却容器(7)内から剥離し、前記固
定フード(91)中に排出される。The steel slag in the cooling container (7) tilted as described above is separated from the inside of the cooling container (7) at a tilt angle of about 110 ° and discharged into the fixed hood (91).
この際、前記冷却容器(7)が固定フード(91)の遮蔽フー
ドの一部を形成するので、概ね密閉状態で集塵が行え
る。At this time, since the cooling container (7) forms a part of the shielding hood of the fixed hood (91), dust can be collected in a substantially sealed state.
また、集塵を完了するまでには前記冷却容器(7)を傾転
角度約135゜まで傾転させた状態で約20秒間保持し、集塵
の完了後、今度は前回の操作とは逆に傾転機構Ａのブー
ム(2)とアーム(3)とを各油圧シリンダー(5)(6)の逆作動
により上記冷却容器(7)を支持ピン(12)を中心とする時
計方向の円弧軌道（図示矢示方向とは反対方向）に沿っ
て傾転させ、当該冷却容器(7)を搬送台車本体(8)上に戻
し、フック(4)の掛合を解除する。In addition, until the dust collection is completed, the cooling container (7) is tilted up to a tilt angle of about 135 ° and held for about 20 seconds.After the dust collection is completed, the operation is reversed from the previous operation. The boom (2) and the arm (3) of the tilting mechanism A are reversely operated by the hydraulic cylinders (5) and (6) to rotate the cooling container (7) in a clockwise arc around the support pin (12). The cooling container (7) is tilted along the track (the direction opposite to the direction shown by the arrow in the drawing), the cooling container (7) is returned onto the carrier body (8), and the hook (4) is disengaged.
その後、搬送台車Ｃを転炉滓等の鋼滓を収容する原位置
まで復帰させる。Then, the carriage C is returned to the original position for accommodating the steel slag such as the converter slag.
第２図の要部正面断面図と第３図の第２図のIII矢示方
向からの側面図は、集塵機構の変形例であって、前記実
施例の一部開口型の固定フード(91)に変えて、図示の通
り、前記冷却容器の傾転に随伴して可動自在の左右一対
の上部揺転フード(13)(13)を固定フード(91)の開口部上
端に、又その両側部にはカンターウエイト(15)によって
冷却容器(7)の傾転前には垂下するように構成された側
面フード(14)を設けた構成である。FIG. 2 is a front sectional view of a main part of FIG. 2 and a side view of FIG. 3 from the direction of the arrow III in FIG. 2 is a modification of the dust collecting mechanism, and is a partial opening type fixed hood (91 ), As shown in the drawing, a pair of left and right upper rocking hoods (13) and (13) that are movable in association with the tilting of the cooling container are provided at the upper end of the opening of the fixed hood (91), and on both sides thereof. The part is provided with a side hood (14) configured to hang down by a canter weight (15) before the cooling container (7) is tilted.
上記の構成を採用することによって、より一層の集塵効
果を高めることができる。By adopting the above configuration, the dust collecting effect can be further enhanced.
（考案の効果） 本考案の冷却容器の傾転装置によれば、冷却容器は搬送
台車上に載置し、且つその搬送台車上で傾転させる構成
を採用したので当該冷却容器が大重量物であってもその
移動に何ら支障がなく、処理工程の工程の短縮化が可能
となり、又当期冷却容器の傾転機構は、冷却容器を排出
する際に当該冷却容器を傾転させる位置に設置したの
で、大型の天井クレーンはもとより該大型クレーンを敷
設する建屋も不要となるので、コストダンとなる。(Advantage of the Invention) According to the cooling container tilting device of the present invention, since the cooling container is mounted on the carrier and tilted on the carrier, the cooling container is a heavy object. However, there is no hindrance to its movement, and the process steps can be shortened.The tilting mechanism of the current cooling container is installed at the position where the cooling container is tilted when the cooling container is discharged. Therefore, not only a large overhead crane but also a building for laying the large crane is not required, which results in cost reduction.
更に、冷却容器の鋼滓を排出する際に発生する粉塵の集
塵機構は、冷却容器内から鋼滓を排出する箇所に固定式
構成としたので、従来装置のように移動させる必要がな
く、固定フードと冷却容器によって密閉状態で集塵する
ことが可能となって、二次公害の発生もない等々の効果
を有する。Furthermore, the dust collection mechanism for the dust generated when discharging the steel slag in the cooling container has a fixed configuration at the place where the steel slag is discharged from the inside of the cooling container, so there is no need to move it like the conventional device, and it is fixed. With the hood and the cooling container, it is possible to collect dust in a sealed state, and there is an effect that secondary pollution does not occur.
第１図は本発明の実施例に係る冷却容器の傾転装置を示
す側面図、第２図は同傾転装置における集塵機構の変形
例を示す要部正面断面図、第３図は第２図III矢示方向
からの側面図である。 符号の名称は以下の通りである。 (1)……基台、(2)……ブーム、(3)……アーム、(4)……
フック、(5)……ブーム用油圧シリンダー、(6)……アー
ム用油圧シリンダー、(7)……冷却容器、(71)……金
具、(8)……搬送台車本体、(81)……車輪、(82)……金
具、(9)……集塵機構本体、(91)……固定フード、(92)
……集塵ダクト、(93)……集塵フード、(10a)(10b)(10
c)(10d)……油圧シリンダーの支持軸、(11)……傾転用
吊り金具、(12)……支持ピン、(13)……上部揺転フー
ド、(14)……側面フード、(15)……カンターウエイト、
Ａ……傾転機構、Ｂ……搬送台車、Ｃ……集塵機構、FIG. 1 is a side view showing a tilting device for a cooling container according to an embodiment of the present invention, FIG. 2 is a front sectional view of an essential part showing a modified example of a dust collecting mechanism in the tilting device, and FIG. FIG. III is a side view from the direction of the arrow in FIG. The names of the symbols are as follows. (1) …… base, (2) …… boom, (3) …… arm, (4) ……
Hook, (5) …… Boom hydraulic cylinder, (6) …… Arm hydraulic cylinder, (7) …… Cooling container, (71) …… Metal fittings, (8) …… Transport vehicle body, (81)… … Wheels, (82) …… Metal fittings, (9) …… Dust collection mechanism body, (91) …… Fixed hood, (92)
...... Dust collection duct, (93) ...... Dust collection hood, (10a) (10b) (10
c) (10d) …… Support shaft of hydraulic cylinder, (11) …… Tilt suspension metal fittings, (12) …… Support pin, (13) …… Top swing hood, (14) …… Side hood, ( 15) …… Canter weight,
A: tilting mechanism, B: carrier cart, C: dust collecting mechanism,
Claims (1)
却容器内で冷却固化させた後、鋼滓を排出する際に使用
する傾転装置であって、前記冷却容器を傾転可能に載置
した冷却容器搬送台車と、該冷却容器搬送台車に載置さ
れた冷却容器を傾転させるための傾転機構と、該傾転機
構により傾転される冷却容器から排出される鋼滓の粉塵
を集塵する開口部を有する固定フードと集塵ダクト並び
に集塵フードとで構成される固定型集塵機構とを具備し
てなる傾転装置。1. A tilting device used when discharging various kinds of steel slag generated from a pig-making and steel-making process after cooling and solidifying the steel slag in the cooling container. Cooling container carrier, a tilting mechanism for tilting the cooling container mounted on the cooling container carrier, and a steel slag discharged from the cooling container tilted by the tilting mechanism. Tilting device comprising a fixed hood having an opening for collecting the above dust, a fixed dust collecting mechanism including a dust collecting duct and a dust collecting hood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8427089U JPH0619554Y2 (en) | 1989-07-18 | 1989-07-18 | Tilting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8427089U JPH0619554Y2 (en) | 1989-07-18 | 1989-07-18 | Tilting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0325548U JPH0325548U (en) | 1991-03-15 |
| JPH0619554Y2 true JPH0619554Y2 (en) | 1994-05-25 |
Family
ID=31632618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8427089U Expired - Lifetime JPH0619554Y2 (en) | 1989-07-18 | 1989-07-18 | Tilting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619554Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015206103A (en) * | 2014-04-23 | 2015-11-19 | 新日鐵住金株式会社 | Converter slag removing device and method for removing slag from converter |
-
1989
- 1989-07-18 JP JP8427089U patent/JPH0619554Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0325548U (en) | 1991-03-15 |
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