JP3411658B2 - Endoscope - Google Patents
EndoscopeInfo
- Publication number
- JP3411658B2 JP3411658B2 JP05964394A JP5964394A JP3411658B2 JP 3411658 B2 JP3411658 B2 JP 3411658B2 JP 05964394 A JP05964394 A JP 05964394A JP 5964394 A JP5964394 A JP 5964394A JP 3411658 B2 JP3411658 B2 JP 3411658B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- water supply
- water
- pipe
- air
- 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 - Fee Related
Links
Landscapes
- Endoscopes (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
Description
【発明の詳細な説明】
【0001】
【産業上の利用分野】この発明は、送ガスと送水の両機
能を有する内視鏡に関する。
【0002】
【従来の技術】近年、高周波処置具を処置具挿通チャン
ネルに挿通して、高周波電流により体腔内の病巣を処置
する経内視鏡的な手術が広く行われるようになってきて
いる。
【0003】そのようにして体腔内で高周波処置を行う
場合、体腔内に可燃性のガスがあると爆発を起こす恐れ
があるので、炭酸ガスなどのような不燃性ガスを体腔内
に送ガスする必要がある。また、病巣部分を鮮明に観察
するためには、送水をする必要がある。
【0004】そこで従来は、内視鏡の挿入部内に処置具
挿通チャンネルとは別に設けられた送気チューブに不燃
性ガスを送り込むことができるように、操作部に管路切
り換え弁を設け、送気操作を行うことによって、送気チ
ューブを介して挿入部先端に向けて送ガスできるように
していた(実公昭63−44008号、特開昭57−1
03621号)。
【0005】
【発明が解決しようとする課題】処置能力の高い処置具
を用いるためには、挿入部内に挿通される処置具挿通チ
ャンネルはできるだけ太くする必要がある。しかし、大
腸内の処置などのように太い消化管内の処置を行う場合
を除いて、内視鏡の挿入部の径を太くすることには挿入
性のうえから大きな制約がある。またその一方で、上述
のように送ガスと送水を効果的に行う必要がある。
【0006】その結果、従来は、処置能力を高めるため
に太いチャンネルを用いれば挿入部が太くなって挿入性
が悪化し、逆に挿入性を良くしようとすればチャンネル
を細くして処置能力を低下させざるを得ず、その両方を
何とか満足させようとすると、効果的な送ガスと送水を
行うことができなくなっていた。
【0007】そこで本発明は、できるだけ細い挿入部内
にできるだけ太い処置具挿通チャンネルを挿通して、し
かも体腔内への送ガスと送水を効果的に行うことができ
る内視鏡を提供することを目的とする。
【0008】
【課題を解決するための手段】上記の目的を達成するた
め、本発明の内視鏡は、処置具類を通過させるために内
視鏡の挿入部内に挿通された処置具挿通チャンネルと、
上記挿入部の基端側に連結された操作部において上記処
置具挿通チャンネル内に不燃性ガスを送り込むように上
記操作部に設けられた送ガス操作手段と、上記処置具挿
通チャンネル内への送ガス動作とは独立して上記操作部
において上記処置具挿通チャンネル内に水を送り込むよ
うに上記送ガス操作手段とは別に上記操作部に設けられ
た送水操作手段とを有することを特徴とする。
【0009】
【実施例】図面を参照して実施例を説明する。図2にお
いて、10は内視鏡の挿入部であり、可撓管11の先端
側に遠隔操作によって屈曲される湾曲部12を連結し、
さらにその先側に先端部本体13を連結して構成されて
いる。
【0010】先端部本体13の端面には、図3に示され
るように、観察窓14と照明窓15と処置具挿通チャン
ネルの出口16aとが形成されている。図2に戻って、
挿入部10の基端側は操作部20に連結されている。そ
して、挿入部10内に全長にわたって挿通された処置具
挿通チャンネル16の入口である処置具挿入口16b
が、操作部20の下端部付近に斜め上方に向けて突設さ
れ、鉗子栓21がそこに着脱自在に取り付けられてい
る。
【0011】処置具挿通チャンネル16は、処置具類を
通過させるためのものであるが、この実施例においては
挿入部10内には他にチャンネル類及びチューブ類は挿
通されておらず、送気、送水、送ガス及び吸引のすべて
が、この処置具挿通チャンネル16を導管として行われ
る。
【0012】22は、操作部20内において処置具挿通
チャンネル16内に空気及び水を選択的に送り込んで、
先端の出口16aに送気、送水をする操作を行うための
送気送水操作弁であり、操作部20の上部に前方に突出
して設けられている。
【0013】23は、操作部20内において処置具挿通
チャンネル16内に例えば炭酸ガスのような不燃性ガス
を送り込んで、先端の出口16aに送ガスをする操作を
行うための送ガス操作弁であり、送気送水操作弁22と
は別に、操作部20の上端近くに後方に向けて突設され
ている。ただし操作部20の側面に突設する等、他の配
置をとってもよい。
【0014】24は、処置具挿通チャンネル16を通じ
てその先端の出口16aから吸引を行う操作を行うため
の吸引操作弁であり、送気送水操作弁22の上方に隣接
して配置されている。
【0015】25は接眼部である。また、操作部20に
基端が連結された可撓性連結管51の先端には、図示さ
れていない光源装置に接続されるコネクタ52が取り付
けられている。
【0016】そしてそのコネクタ52の側壁には、図示
されていない送気ポンプと給水タンクから給気及び給水
を受ける2重筒構造の給気給水口金53と、炭酸ガスボ
ンベ等のような不燃性ガスの供給を受ける給ガス口金5
4と、吸引器に接続される吸引口金55が突設されてい
る。56は、コネクタ52内と外気との間を開閉するた
めの通気口金である。
【0017】図4は操作部20を示しており、各操作弁
22,23,24は、いずれも溝や孔が形成されて前方
に付勢されたピストン222,232,242をシリン
ダ221,231,241内に摺動自在に配置して、ピ
ストン222,232,242の先端に取着した操作釦
223,233,243を操作するようになっている。
【0018】なお、そのような弁構造は公知なので細か
い説明は省略をする。また、各ピストン222,23
2,242とシリンダ221,231,241との摺動
面には、適宜シール用のOリングが装着されているが、
その図示は省略されている。
【0019】コネクタ52の給気給水口金53に接続さ
れた給気管31と給水管32は、送気送水操作弁22の
シリンダ221に接続され、給ガス口金54に接続され
た給ガス管33は、送ガス操作弁23のシリンダ231
に接続され、吸引口金55に接続された吸引管34は、
吸引操作弁24のシリンダ241に接続されている。
【0020】吸引操作弁24のシリンダ241の端部と
処置具挿通チャンネル16との間は、操作部20内にお
いて、太い連通管36によって連通接続されている。そ
して、その連通管36の途中に介挿された中継筒37と
送気送水操作弁22のシリンダ221及び送ガス操作弁
23のシリンダ231との間が、送水管38及び送ガス
管39によって接続されている。したがって、両操作弁
22,23からの送水と送ガスは、操作部20内におい
て中継筒37を介して連通管36内に行われる。
【0021】また、送気送水操作弁22のシリンダ22
1に接続された送気管40は、送ガス操作弁23のシリ
ンダ231に接続されており、送気送水操作弁22から
の送気は、一度送ガス操作弁23のシリンダ231内を
通り、送ガス管39を経由して送ガスと同じルートで行
われる。
【0022】この図4は待機状態を示しており、連通管
36に対して各操作弁22,23,24からは送気も送
水も送ガスも吸引も行われない。この状態では、給気管
31から送気送水操作弁22のシリンダ221に供給さ
れた空気が、操作釦223に開口するリーク孔224か
ら大気中に放出されており、給水管32、給ガス管33
及び吸引管34はいずれもピストン222,232,2
42で塞がれている。
【0023】この状態から吸引操作釦243を押し込む
と、ピストン242の移動により吸引管34と連通管3
6とが連通して、図4に破線で示されるように、処置具
挿通チャンネル16を通じて挿入部先端から吸引が行わ
れる。
【0024】また、図5に示されるように、送気送水操
作釦223のリーク孔224を指先で塞げば、給気管3
1からシリンダ221内に送り込まれた空気が送気管4
0へ送り出され、送ガス操作弁23のシリンダ231か
ら送ガス管39を経由して、中継筒37から連通管3
6、そして処置具挿通チャンネル16に至って、挿入部
先端の出口16aから送気される。
【0025】そして、図1に示されるように、送気送水
操作釦223を押し込めば、ピストン222の移動によ
り給気管31が塞がれて、給水管32が送水管38と連
通して、水が中継筒37から連通管36内に送られ、処
置具挿通チャンネル16を経由して挿入部先端に送水さ
れて、先端の出口16aから水が噴出する。それによっ
て、被観察部表面の洗浄などを行うことができる。
【0026】また図1に示されるように、送ガス操作釦
233を押し込めば、給ガス管33と送ガス管39とが
連通して、炭酸ガスが中継筒37から連通管36内に送
られ、処置具挿通チャンネル16を経由して挿入部先端
に送ガスされて、先端の出口16aから炭酸ガスが噴出
する。それによって体腔内に炭酸ガスが送られ、高周波
処置を行っても爆発等の危険性が無くなる。
【0027】図1に示されるように、送水操作と送ガス
操作とは互いに全く独立して操作をすることができる。
したがって、送水と送ガスの両方の操作を同時に行え
ば、同じ処置具挿通チャンネル16を経由して、水と炭
酸ガスとを混合させた混合噴射を行うことができ、被観
察面の洗浄と体腔内への不燃性ガス充填とを任意かつ容
易に同時に行うことができる。また混合噴射することに
よって、水だけを噴射する場合より優れた洗浄作用を得
ることもできる。
【0028】また、送水操作と送ガス操作とを互いに全
く独立して行うことができることから、両操作釦22
3,233の押し込み量を適宜調整することにより、水
と炭酸ガスの混合比を任意に変えることができ、常に必
要に応じた量の送水と送ガスとを行うことができる。
【0029】なお、本発明は上記実施例に限定されるも
のではなく、例えば、送気及び吸引の機能などは必ずし
も設けられていなくてもよい。
【0030】
【発明の効果】本発明によれば、挿入部内に一本の処置
具挿通チャンネルを挿通するだけで、その処置具挿通チ
ャンネルを経由して、挿入部先端への送ガスと送水を行
うことができるので、挿入部の外径をできるだけ細く形
成すると共に処置具挿通チャンネルをできるだけ太く形
成すると共に高周波処置等の際に必要な不燃性ガスの送
ガスと送水を行うことができ、しかも、互いに独立して
設けられた送ガス操作釦と送水操作釦により、送ガスと
送水を独立して任意の混合状態で混合噴射することがで
きる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope having both functions of gas supply and water supply. 2. Description of the Related Art In recent years, transendoscopic surgery for inserting a high-frequency treatment instrument into a treatment instrument insertion channel to treat a lesion in a body cavity with a high-frequency current has been widely performed. . When a high-frequency treatment is performed in a body cavity in this manner, an explosion may occur if there is a flammable gas in the body cavity. Therefore, an incombustible gas such as carbon dioxide gas is sent into the body cavity. There is a need. In addition, it is necessary to supply water in order to clearly observe the lesion. Conventionally, therefore, a pipe switching valve is provided in the operation section so that the non-combustible gas can be fed into an air supply tube provided separately from the treatment instrument insertion channel in the insertion section of the endoscope. By performing a pneumatic operation, gas can be supplied toward the distal end of the insertion portion via an air supply tube (Japanese Utility Model Publication No. 63-44008, Japanese Patent Application Laid-Open No. 57-1)
03621). [0005] In order to use a treatment instrument having a high treatment capability, the treatment instrument insertion channel inserted into the insertion portion needs to be as thick as possible. However, increasing the diameter of the insertion portion of the endoscope has a great limitation in terms of insertability, except when performing treatment in a large digestive tract such as treatment in the large intestine. On the other hand, gas supply and water supply need to be performed effectively as described above. As a result, conventionally, if a thick channel is used in order to enhance the treatment ability, the insertion portion becomes thicker and the insertability deteriorates. Conversely, if the insertability is improved, the channel is made thinner to increase the treatment ability. If both had to be reduced and somehow tried to satisfy both, effective gas supply and water supply could not be achieved. Accordingly, an object of the present invention is to provide an endoscope which allows a treatment instrument insertion channel as thick as possible to be inserted into an insertion portion which is as thin as possible, and which can effectively perform gas supply and water supply into a body cavity. And [0008] To achieve the above object, an endoscope according to the present invention comprises a treatment tool insertion channel inserted into an insertion portion of the endoscope for allowing treatment tools to pass therethrough. When,
Gas supply operation means provided in the operation section so as to feed nonflammable gas into the treatment instrument insertion channel at an operation section connected to the proximal end side of the insertion section; In addition to the gas supply operation unit, the operation unit is provided with a water supply operation unit provided separately from the gas supply operation unit so as to supply water into the treatment instrument insertion channel in the operation unit independently of the gas operation. An embodiment will be described with reference to the drawings. In FIG. 2, reference numeral 10 denotes an insertion portion of an endoscope, which connects a bending portion 12 that is bent by remote control to a distal end side of a flexible tube 11,
Further, the distal end body 13 is connected to the tip side. As shown in FIG. 3, an observation window 14, an illumination window 15, and an outlet 16a of a treatment instrument insertion channel are formed on an end surface of the distal end body 13. Returning to FIG.
The proximal end side of the insertion section 10 is connected to the operation section 20. Then, a treatment instrument insertion port 16b which is an entrance of the treatment instrument insertion channel 16 inserted through the entire length of the insertion section 10
Is protruded obliquely upward near the lower end of the operation unit 20, and a forceps plug 21 is detachably attached thereto. The treatment tool insertion channel 16 is for allowing treatment tools to pass therethrough. In this embodiment, no other channels and tubes are inserted into the insertion portion 10, and air supply is performed. , Water supply, gas supply, and suction are all performed using the treatment instrument insertion channel 16 as a conduit. 22 selectively sends air and water into the treatment instrument insertion channel 16 in the operation section 20;
An air / water supply operation valve for performing an operation of supplying / supplying water to / from the outlet 16a at the distal end, and is provided at an upper portion of the operation unit 20 so as to project forward. Reference numeral 23 denotes a gas feed operation valve for feeding an incombustible gas such as carbon dioxide gas into the treatment instrument insertion channel 16 in the operation section 20 and sending the gas to the outlet 16a at the distal end. In addition, separately from the air / water supply operation valve 22, it is protruded rearward near the upper end of the operation unit 20. However, other arrangements such as protruding from the side surface of the operation unit 20 may be adopted. Reference numeral 24 denotes a suction operation valve for performing an operation of performing suction from the outlet 16 a at the distal end through the treatment instrument insertion channel 16, and is disposed above and adjacent to the air / water supply operation valve 22. Reference numeral 25 denotes an eyepiece. A connector 52 that is connected to a light source device (not shown) is attached to a distal end of a flexible connection pipe 51 whose base end is connected to the operation unit 20. On the side wall of the connector 52, an air supply pump (not shown) and an air supply water supply base 53 having a double cylinder structure for receiving air and water from a water supply tank, and a non-combustible gas such as a carbon dioxide gas cylinder are provided. Gas supply base 5 receiving supply of water
4 and a suction base 55 connected to the suction device are provided in a protruding manner. Reference numeral 56 denotes a ventilation cap for opening and closing between the inside of the connector 52 and the outside air. FIG. 4 shows the operation section 20, and each of the operation valves 22, 23, and 24 has a cylinder 221 or 231 formed with a groove or hole and urged forward by a piston 222, 232 or 242. , 241, and slidably disposed therein to operate the operation buttons 223, 233, 243 attached to the tips of the pistons 222, 232, 242. Since such a valve structure is known, a detailed description will be omitted. In addition, each piston 222, 23
An O-ring for sealing is appropriately mounted on the sliding surface between the cylinders 2,242 and the cylinders 221,231,241.
Its illustration is omitted. The air supply pipe 31 and the water supply pipe 32 connected to the air supply / water supply base 53 of the connector 52 are connected to the cylinder 221 of the air / water supply operation valve 22, and the gas supply pipe 33 connected to the gas supply base 54 is connected to the gas supply pipe 33. , Cylinder 231 of gas supply operation valve 23
And the suction tube 34 connected to the suction base 55 is
The suction operation valve 24 is connected to a cylinder 241. The end of the cylinder 241 of the suction operation valve 24 and the treatment instrument insertion channel 16 are connected in the operation section 20 by a thick communication pipe 36. The relay pipe 37 inserted in the middle of the communication pipe 36 and the cylinder 221 of the air / water supply operation valve 22 and the cylinder 231 of the gas supply operation valve 23 are connected by a water supply pipe 38 and a gas supply pipe 39. Have been. Therefore, water supply and gas supply from both operation valves 22 and 23 are performed in the communication pipe 36 via the relay cylinder 37 in the operation unit 20. The cylinder 22 of the air / water supply operation valve 22
1 is connected to the cylinder 231 of the gas supply operation valve 23, and the air supply from the gas supply / water supply operation valve 22 once passes through the cylinder 231 of the gas supply operation valve 23, This is performed on the same route as the gas transmission via the gas pipe 39. FIG. 4 shows a standby state, in which no air is supplied, no water is supplied, no gas is supplied, or no suction is performed from the operation valves 22, 23, 24 to the communication pipe 36. In this state, the air supplied from the air supply pipe 31 to the cylinder 221 of the air / water supply operation valve 22 is discharged into the atmosphere from the leak hole 224 opened to the operation button 223, and the water supply pipe 32, the gas supply pipe 33
And the suction pipe 34 are both pistons 222, 232, 2
Blocked at 42. When the suction operation button 243 is pressed in this state, the movement of the piston 242 causes the suction pipe 34 and the communication pipe 3 to move.
4 and suction is performed from the distal end of the insertion portion through the treatment tool insertion channel 16 as shown by a broken line in FIG. As shown in FIG. 5, if the leak hole 224 of the air / water supply operation button 223 is closed with a fingertip, the air supply pipe 3
The air sent into cylinder 221 from
0, and from the cylinder 231 of the gas feed operation valve 23 via the gas feed pipe 39, and from the relay cylinder 37 to the communication pipe 3
6, and the air reaches the treatment instrument insertion channel 16 from the outlet 16a at the distal end of the insertion portion. As shown in FIG. 1, when the air / water supply operation button 223 is pushed, the air supply pipe 31 is closed by the movement of the piston 222, and the water supply pipe 32 communicates with the water supply pipe 38, and Is sent from the relay tube 37 into the communication pipe 36, is supplied to the distal end of the insertion portion via the treatment tool insertion channel 16, and water is ejected from the outlet 16a at the distal end. Thereby, cleaning of the surface of the observed portion can be performed. As shown in FIG. 1, when the gas supply operation button 233 is pressed, the gas supply pipe 33 and the gas supply pipe 39 communicate with each other, and carbon dioxide gas is sent from the relay cylinder 37 into the communication pipe 36. Then, gas is sent to the distal end of the insertion portion via the treatment instrument insertion channel 16, and carbon dioxide gas is ejected from the outlet 16a at the distal end. As a result, carbon dioxide gas is sent into the body cavity, and even if high-frequency treatment is performed, there is no danger of explosion or the like. As shown in FIG. 1, the water supply operation and the gas supply operation can be operated completely independently of each other.
Therefore, by performing both water supply and gas supply operations simultaneously, it is possible to perform mixed injection of water and carbon dioxide gas through the same treatment tool insertion channel 16, thereby cleaning the surface to be observed and the body cavity. The non-combustible gas filling into the inside can be performed arbitrarily and easily simultaneously. In addition, by mixing and injecting, it is possible to obtain a better cleaning action than when only water is injected. Further, since the water supply operation and the gas supply operation can be performed completely independently of each other, both operation buttons 22
By appropriately adjusting the pushing amount of 3,233, the mixing ratio of water and carbon dioxide gas can be arbitrarily changed, and the necessary amount of water and gas can always be supplied. Note that the present invention is not limited to the above embodiment, and for example, the functions of air supply and suction may not be necessarily provided. According to the present invention, the gas supply and the water supply to the distal end of the insertion portion can be performed only by inserting one treatment instrument insertion channel into the insertion portion and passing through the treatment instrument insertion channel. Therefore, the outer diameter of the insertion portion can be formed as thin as possible, and the treatment instrument insertion channel can be formed as thick as possible. By the gas supply operation button and the water supply operation button provided independently of each other, the gas supply and the water supply can be independently mixed and injected in an arbitrary mixing state.
【図面の簡単な説明】
【図1】実施例の送水及び送ガス状態の側面断面図であ
る。
【図2】実施例の内視鏡の全体側面図である。
【図3】実施例の内視鏡の挿入部先端の斜視図である。
【図4】実施例の待機状態の側面断面図である。
【図5】実施例の送気状態の側面断面図である。
【符号の説明】
10 挿入部
16 処置具挿通チャンネル
20 操作部
22 送気送水操作弁
23 送ガス操作弁BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of a water supply and gas supply state of an embodiment. FIG. 2 is an overall side view of the endoscope of the embodiment. FIG. 3 is a perspective view of a distal end of an insertion portion of the endoscope according to the embodiment. FIG. 4 is a side sectional view of the embodiment in a standby state. FIG. 5 is a side sectional view of the air supply state of the embodiment. [Description of Signs] 10 Insertion section 16 Treatment tool insertion channel 20 Operation section 22 Air supply / water supply operation valve 23 Gas supply operation valve
フロントページの続き (58)調査した分野(Int.Cl.7,DB名) A61B 1/00 - 1/32 Continuation of front page (58) Field surveyed (Int.Cl. 7 , DB name) A61B 1/00-1/32
Claims (1)
部内に挿通された処置具挿通チャンネルと、 上記挿入部の基端側に連結された操作部において送ガス
管に不燃性ガスを送り込む操作を行うように上記操作部
に配置された送ガス操作手段と、 上記送ガス操作手段による送ガス動作とは独立して上記
操作部において送水管に水を送り込むように、上記送ガ
ス操作手段とは別に上記操作部に配置された送水操作手
段とを設け、 上記送ガス管と上記送水管とをそれらより太い連通管に
合流させて、その連通管を上記処置具挿通チャンネルに
連通接続した ことを特徴とする内視鏡。(57) Claims 1. A treatment tool insertion channel inserted into an insertion portion of an endoscope for passing treatment tools, and an operation connected to a proximal end side of the insertion portion. Gas transmission in the department
Feeding the feed gas operating means arranged on the operation unit to perform an operation for feeding the noncombustible gas to the tube, independently of the gas operation feed by the feed gas operating means water into the water pipe in the operating unit as such, the feed provided separately and water supply operation means arranged in the operation unit and the gas operating means and the feed gas tube and the water supply to a thick communication pipe than those
And connect the communicating pipe to the treatment instrument insertion channel.
An endoscope characterized by being connected in communication .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP05964394A JP3411658B2 (en) | 1994-03-30 | 1994-03-30 | Endoscope |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP05964394A JP3411658B2 (en) | 1994-03-30 | 1994-03-30 | Endoscope |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07265259A JPH07265259A (en) | 1995-10-17 |
JP3411658B2 true JP3411658B2 (en) | 2003-06-03 |
Family
ID=13119114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP05964394A Expired - Fee Related JP3411658B2 (en) | 1994-03-30 | 1994-03-30 | Endoscope |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3411658B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3825541B2 (en) * | 1997-09-10 | 2006-09-27 | ペンタックス株式会社 | Endoscope |
DE10334562B4 (en) | 2003-07-29 | 2005-06-09 | Erbe Elektromedizin Gmbh | Surgical instrument |
JP4526313B2 (en) * | 2004-07-01 | 2010-08-18 | オリンパス株式会社 | Air supply system |
-
1994
- 1994-03-30 JP JP05964394A patent/JP3411658B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH07265259A (en) | 1995-10-17 |
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