JPH07323277A - Water purifying cartridge - Google Patents
Water purifying cartridgeInfo
- Publication number
- JPH07323277A JPH07323277A JP7157381A JP15738195A JPH07323277A JP H07323277 A JPH07323277 A JP H07323277A JP 7157381 A JP7157381 A JP 7157381A JP 15738195 A JP15738195 A JP 15738195A JP H07323277 A JPH07323277 A JP H07323277A
- Authority
- JP
- Japan
- Prior art keywords
- outer case
- water
- case
- fiber membrane
- activated carbon
- 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
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は家庭の水道水等の飲料水
を浄化する水浄化カートリッジに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification cartridge for purifying drinking water such as domestic tap water.
【０００２】[0002]
【従来の技術】この種水浄化カートリッジとしては、特
開昭60−179187号公報に示されているように、ホデーに
水浄化カートリッジを着脱自在に取付け、水浄化カート
リッジの下方に通水入口および通水出口を設け、この通
水入口および通水出口に連通する入口通路および出口通
路をボデーに設け、水浄化カートリッジ内に活性炭を収
納し、その活性炭の通水出口側にフイルタを配置したも
のが公知である。2. Description of the Related Art As a water purifying cartridge of this type, as disclosed in Japanese Patent Laid-Open No. 60-179187, a water purifying cartridge is detachably attached to a body, and a water inlet and a water inlet are provided below the water purifying cartridge. A water outlet is provided, an inlet passage and an outlet passage communicating with the water inlet and the water outlet are provided in the body, activated carbon is stored in a water purification cartridge, and a filter is arranged on the water outlet side of the activated carbon. Is known.
【０００３】[0003]
【発明が解決しようとする課題】かかる水浄化カートリ
ッジは、活性炭とフイルタとによる水の処理であって中
空糸膜を処理材として利用するものについては配慮され
ていなかった。In this water purification cartridge, no consideration was given to the treatment of water with activated carbon and a filter, which uses a hollow fiber membrane as a treatment material.
【０００４】本発明の目的は、構造的に小型で、且つ、
中空糸膜を処理材として利用した新規な水浄化カートリ
ッジを提供することにある。It is an object of the present invention to be structurally compact and
An object of the present invention is to provide a novel water purification cartridge that uses a hollow fiber membrane as a treatment material.
【０００５】[0005]
【課題を解決するための手段】本発明の第１の特徴は、
通水入口と通水出口とを有し内部に水浄化処理材を配置
した水浄化カートリッジにおいて、前記水浄化カートリ
ッジは筒状の密閉された外側ケース部と、前記外側ケー
ス部の内部にあり両端が開放した筒状の内側ケース部
と、前記外側ケース部と前記内側ケース部の間に形成さ
れ活性炭が充填された活性炭部と、前記内側ケース部の
内部に中空糸膜が配置された中空糸膜部と、前記活性炭
が前記中空糸膜部に移動するのを抑制する多孔板と、前
記外側ケース部の端部付近に設けられ前記活性炭部に接
続される前記通水入口と、前記外側ケース部の端部付近
に設けられ前記中空糸膜部に接続される前記通水出口
と、前記外側ケース部内に設けられ、前記通水出口と前
記活性炭部を水密的に隔離する前記内側ケース部の一端
外周に設けられた隔離部とより構成されていることを特
徴とする水浄化カートリッジにある。The first feature of the present invention is to:
In a water purification cartridge having a water inlet and a water outlet and having a water purification treatment material disposed therein, the water purification cartridge has a cylindrical outer case portion and both ends inside the outer case portion. A hollow cylindrical inner case part, an activated carbon part filled between the outer case part and the inner case part with activated carbon, and a hollow fiber in which a hollow fiber membrane is arranged inside the inner case part. A membrane portion, a porous plate that suppresses the activated carbon from moving to the hollow fiber membrane portion, the water inlet provided near the end of the outer case portion and connected to the activated carbon portion, and the outer case Of the inner case portion that is provided near the end portion of the portion and that is connected to the hollow fiber membrane portion, and the water passage outlet that is provided in the outer case portion and that watertightly isolates the water passage outlet from the activated carbon portion. Isolation provided on the outer circumference In water purification cartridge, characterized in that it is more configuration when.
【０００６】本発明の第２の特徴は、通水入口と通水出
口とを有し内部に水浄化処理材を配置した水浄化カート
リッジにおいて、前記水浄化カートリッジは筒状の一方
側が開放された開放部を有する外側ケースと、前記外側
ケースの内側に配置され両端が開放された筒状の内側ケ
ースと、前記外側ケースに配置され前記内側ケースの前
記外側ケースの開放部側の一端外周に設けられた多孔板
部と、前記内側ケースの前記外側ケースの開放部側とは
反対側の一端外周を水密的に固定する前記外側ケースに
設けられた内側ケース固定部と、前記外側ケースと前記
内側ケース及び前記多孔板部の間に形成され活性炭が充
填された活性炭部と、前記内側ケース内に中空糸膜が配
置された中空糸膜部と、前記外側ケースの他方側付近に
設けられ前記活性炭部に接続される前記通水入口及び前
記中空糸膜部に接続される前記通水出口と、前記外側ケ
ースの開放部を閉塞すると共に前記多孔板部から前記中
空糸膜部に至る通水路を形成するキャップ部とより構成
されていることを特徴とする水浄化カートリッジにあ
る。The second feature of the present invention is a water purification cartridge having a water inlet and a water outlet and having a water purification treatment material disposed therein, wherein the water purification cartridge has one cylindrical side open. An outer case having an open portion, a tubular inner case arranged inside the outer case and having both ends open, and an outer case, which is arranged in the outer case and is provided on the outer periphery of one end of the outer case on the open portion side of the outer case. Perforated plate portion, an inner case fixing portion provided on the outer case for watertightly fixing the outer periphery of one end of the inner case opposite to the open side of the outer case, the outer case and the inner side. An activated carbon portion formed between the case and the perforated plate portion and filled with activated carbon, a hollow fiber membrane portion in which a hollow fiber membrane is arranged in the inner case, and the active carbon portion provided near the other side of the outer case. A water passage inlet connected to the hollow fiber membrane portion and a water passage outlet connected to the hollow fiber membrane portion, and a water passage extending from the perforated plate portion to the hollow fiber membrane portion while closing the open portion of the outer case. The water purification cartridge is characterized by comprising a cap portion to be formed.
【０００７】[0007]
【作用】かかる水浄化カートリッジによれば、水浄化カ
ートリッジを構成する外側ケース部の内部に中空糸膜が
配置された内側ケース部を設け、更にその間に活性炭と
を配置すると共に、通水出口と活性炭部を水密的に隔離
する隔離部を外側ケース内に設けたので、中空糸膜を用
いた小型の水浄化カートリッジとすることができる。According to such a water purification cartridge, an inner case portion in which a hollow fiber membrane is arranged is provided inside an outer case portion that constitutes the water purification cartridge, and activated carbon is arranged between the inner case portion and the water passage outlet. Since the isolation portion that watertightly isolates the activated carbon portion is provided in the outer case, a small-sized water purification cartridge using a hollow fiber membrane can be obtained.
【０００８】[0008]
【実施例】以下、本発明の一実施例を図１〜図３に基づ
いて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【０００９】浄水器のボデー１は接続部２を介して水栓
３に着脱自在に取付けられている。また、ボデー１は中
央通路１ａを有し、その中に切換弁４が収納され、この
切換弁４は水栓連通路１ｂを源水吐出通路１ｃと入口通
路１ｄとに切換え連通する。The body 1 of the water purifier is detachably attached to the faucet 3 via the connecting portion 2. Further, the body 1 has a central passage 1a, in which a switching valve 4 is housed, and the switching valve 4 connects the faucet communication passage 1b to the source water discharge passage 1c and the inlet passage 1d.
【００１０】水浄化カートリッジ５はボデー１に着脱自
在に取付けられており、この水浄化カートリッジ５はそ
の下面に通水入口５ａと通水出口５ｂとを有している。The water purification cartridge 5 is detachably attached to the body 1. The water purification cartridge 5 has a water inlet 5a and a water outlet 5b on the lower surface thereof.
【００１１】そして、この通水入口５ａはボデー１の入
口通路１ｄに連通され、通水出口５ｂはボデー１の浄水
出口通路１ｅに連通される。The water inlet 5a is connected to the inlet passage 1d of the body 1, and the water outlet 5b is connected to the purified water outlet passage 1e of the body 1.
【００１２】水浄化カートリッジ５を構成する外側ケー
ス５ｅは一端が閉塞され、他端が開放した円筒状に形成
され、この外側ケース５ｅ内には中空糸膜６を収納する
中空糸膜部を形成する内側ケース、ここでは中空糸膜ケ
ース９が収納され、その周囲である外側ケース５ｅと中
空糸膜ケース９の間の空間には粒状やし殻活性炭７が収
納された活性炭部が形成されている。The outer case 5e constituting the water purification cartridge 5 is formed in a cylindrical shape with one end closed and the other end open, and a hollow fiber membrane portion for housing the hollow fiber membrane 6 is formed in the outer case 5e. The inner case, here the hollow fiber membrane case 9, is housed, and in the space between the outer case 5e and the hollow fiber membrane case 9 around the inner case, an activated carbon portion in which the granular palm shell activated carbon 7 is housed is formed. There is.
【００１３】活性炭７の上下端面を形成するように多孔
板１０，１１が配置されており、これは活性炭７が移動
するのを抑制する働きをする。The perforated plates 10 and 11 are arranged so as to form the upper and lower end surfaces of the activated carbon 7, which functions to prevent the activated carbon 7 from moving.
【００１４】また、多孔板１１は外側ケース５ｅ内に配
置され、中空糸膜ケース９の一端外周に設けられてい
る。更に、中空糸膜ケース９の他端外周は外側ケース５
ｅ内部に形成された中空糸膜ケース支持部５ｆによって
支持されている。この中空糸膜ケース支持部５ｆは外側
ケース５ｅと水密的に固定されており、通水出口５ｂと
活性炭部とを隔離するものである。The perforated plate 11 is arranged in the outer case 5e and is provided on the outer periphery of one end of the hollow fiber membrane case 9. Further, the outer circumference of the other end of the hollow fiber membrane case 9 is the outer case 5.
It is supported by the hollow fiber membrane case supporting portion 5f formed inside e. The hollow fiber membrane case supporting portion 5f is watertightly fixed to the outer case 5e and separates the water outlet 5b from the activated carbon portion.
【００１５】活性炭７と通水入口５ａとの間には逆止弁
８が配置されており、逆止弁８は自重によって通水入口
５ａを塞ぎ、水圧が加わると上方へ浮いてその周囲の隙
間から水が活性炭７に至るものである。A check valve 8 is arranged between the activated carbon 7 and the water inlet 5a. The check valve 8 blocks the water inlet 5a by its own weight and floats upward when water pressure is applied to the surrounding area. Water reaches the activated carbon 7 through the gap.
【００１６】中空糸膜６と活性炭７の上端はほぼ一致し
ており、その上方空間５ｃである通水路を介して両者は
連通されている。従って、中空糸膜６はその上端部が水
の入口側となる。The upper ends of the hollow fiber membrane 6 and the activated carbon 7 are substantially coincident with each other, and they are communicated with each other via a water passage which is an upper space 5c. Therefore, the hollow fiber membrane 6 has its upper end portion on the water inlet side.
【００１７】水浄化カートリッジ５の上壁は透明なキャ
ップ５ｄが取付けられている。つまり、外側ケース５ｅ
の開放された部分に透明なキャップ５ｄが固着されてい
るもので、このキャップ５ｄは凹面形をしている。尚、
上述のことから当然外側ケース５ｅは不透明である。A transparent cap 5d is attached to the upper wall of the water purification cartridge 5. That is, the outer case 5e
A transparent cap 5d is fixed to the open part of the cap, and the cap 5d has a concave shape. still,
From the above, the outer case 5e is naturally opaque.
【００１８】そして、中空糸膜６は上端部で折曲げて形
成されている。The hollow fiber membrane 6 is formed by bending at the upper end.
【００１９】また、水浄化カートリッジ５はボデー１側
に押しつけるように、カバー１２がホデー１に着脱自在
に取付けられている。A cover 12 is detachably attached to the body 1 so that the water purification cartridge 5 is pressed against the body 1.
【００２０】かかる浄水器において、切換弁４を源水側
に設定すると源水は水栓３から原水吐出通路１ｃより直
接外部へ取出すことができる。In such a water purifier, when the switching valve 4 is set to the source water side, the source water can be taken out directly from the faucet 3 through the raw water discharge passage 1c.
【００２１】また、切換弁４を浄水側に設定すると、原
水は水栓３から入口通路１ｄを通って水浄化カートリッ
ジ５の通水入口５ａに至り、逆止弁８に水圧が加わって
これを浮かせ、活性炭７を通って塩素臭および汚れが活
性炭７に吸着された後、通水路５ｃを通って中空糸膜６
の上端部側から流入して雑菌が除去され、しかる後に通
水出口５ｂおよび浄水出口通路１ｅを通って外部へ浄水
となって取出すことができる。When the switching valve 4 is set to the purified water side, the raw water reaches the water inlet 5a of the water purification cartridge 5 from the faucet 3 through the inlet passage 1d, and the check valve 8 receives water pressure to change the raw water. After being floated and chlorine odor and dirt are adsorbed by the activated carbon 7 through the activated carbon 7, the hollow fiber membrane 6 is passed through the water passage 5c.
Bacteria are removed from the upper end side by removing the bacteria, and thereafter, purified water can be taken out to the outside through the water outlet 5b and the purified water outlet passage 1e.
【００２２】かかる水浄化カートリッジによれば、水浄
化カートリッジを構成する外側ケース部の内部に中空糸
膜が配置された内側ケース部を設け、更にその間に活性
炭とを配置すると共に、通水出口と活性炭部を水密的に
隔離する隔離部を外側ケース内に設けたので、中空糸膜
を用いた小型の水浄化カートリッジとすることができ
る。According to such a water purification cartridge, an inner case portion in which the hollow fiber membrane is arranged is provided inside the outer case portion which constitutes the water purification cartridge, and activated carbon is arranged between the inner case portion and the water passage outlet. Since the isolation portion that watertightly isolates the activated carbon portion is provided in the outer case, a small-sized water purification cartridge using a hollow fiber membrane can be obtained.
【００２３】[0023]
【発明の効果】本発明の浄水器によれば、中空糸膜を用
いた小型の水浄化カートリッジを得ることができる。According to the water purifier of the present invention, a small-sized water purification cartridge using a hollow fiber membrane can be obtained.
【図１】本発明の水浄化カートリッジが取り付けられた
浄水器の縦断面図。FIG. 1 is a vertical sectional view of a water purifier to which a water purification cartridge of the present invention is attached.
【図２】図１のII−II断面図。FIG. 2 is a sectional view taken along line II-II of FIG.
【図３】本発明の水浄化カートリッジ単体の縦断面図。FIG. 3 is a vertical cross-sectional view of a single water purification cartridge of the present invention.
１…ホデー、２…接続部、３…水栓、４…切換弁、５…
水浄化カートリッジ、５ｅ…外側ケース、６…中空糸
膜、７…活性炭、８…逆止弁、９…中空糸膜ケース、１
０，１１…多孔板、１２…カバー。1 ... Hody, 2 ... Connecting part, 3 ... water faucet, 4 ... switching valve, 5 ...
Water purification cartridge, 5e ... Outer case, 6 ... Hollow fiber membrane, 7 ... Activated carbon, 8 ... Check valve, 9 ... Hollow fiber membrane case, 1
0, 11 ... Perforated plate, 12 ... Cover.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 三ケ田 謙三 茨城県日立市東多賀町１丁目１番１号 株 式会社日立製作所多賀工場内 (72)発明者 塚本 裕宥 茨城県日立市東多賀町１丁目１番１号 株 式会社日立製作所多賀工場内 (72)発明者 猿田 賢二 茨城県日立市東多賀町１丁目１番１号 多 賀産業株式会社内 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Kenzo Sangada 1-1-1, Higashitaga-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Taga factory (72) Inventor Yutaka Tsukamoto 1-chome, Higashitaga-cho, Hitachi-shi, Ibaraki 1-1 No. 1 Incorporated company Hitachi Ltd. Taga factory (72) Inventor Kenji Saruta 1-1-1 Higashi Taga-cho, Hitachi-shi, Ibaraki Taga Sangyo Co., Ltd.
Claims (2)
処理材を配置した水浄化カートリッジにおいて、 前記水浄化カートリッジは筒状の密閉された外側ケース
部と、前記外側ケース部の内部にあり両端が開放した筒
状の内側ケース部と、前記外側ケース部と前記内側ケー
ス部の間に形成され活性炭が充填された活性炭部と、前
記内側ケース部の内部に中空糸膜が配置された中空糸膜
部と、前記活性炭が前記中空糸膜部に移動するのを抑制
する多孔板と、前記外側ケース部の端部付近に設けられ
前記活性炭部に接続される前記通水入口と、前記外側ケ
ース部の端部付近に設けられ前記中空糸膜部に接続され
る前記通水出口と、前記外側ケース部内に設けられ、前
記通水出口と前記活性炭部を水密的に隔離する前記内側
ケース部の一端外周に設けられた隔離部とより構成され
ていることを特徴とする水浄化カートリッジ。1. A water purification cartridge having a water inlet and a water outlet, in which a water purification treatment material is disposed, wherein the water purification cartridge has a cylindrical outer case portion and the outer case portion. A cylindrical inner case part having both ends open inside, an activated carbon part filled between the outer case part and the inner case part with activated carbon, and a hollow fiber membrane inside the inner case part. A hollow fiber membrane portion arranged, a perforated plate that suppresses the activated carbon from moving to the hollow fiber membrane portion, and the water inlet provided near the end of the outer case portion and connected to the activated carbon portion And a water outlet provided near the end of the outer case portion and connected to the hollow fiber membrane portion, and a water outlet provided in the outer case portion to watertightly separate the water outlet and the activated carbon portion. Installed on the outer circumference of one end of the inner case A water purification cartridge characterized in that it is composed of a stripped isolation part.
処理材を配置した水浄化カートリッジにおいて、 前記水浄化カートリッジは筒状の一方側が開放された開
放部を有する外側ケースと、前記外側ケースの内側に配
置され両端が開放された筒状の内側ケースと、前記外側
ケースに配置され前記内側ケースの前記外側ケースの開
放部側の一端外周に設けられた多孔板部と、前記内側ケ
ースの前記外側ケースの開放部側とは反対側の一端外周
を水密的に固定する前記外側ケースに設けられた内側ケ
ース固定部と、前記外側ケースと前記内側ケース及び前
記多孔板部の間に形成され活性炭が充填された活性炭部
と、前記内側ケース内に中空糸膜が配置された中空糸膜
部と、前記外側ケースの他方側付近に設けられ前記活性
炭部に接続される前記通水入口及び前記中空糸膜部に接
続される前記通水出口と、前記外側ケースの開放部を閉
塞すると共に前記多孔板部から前記中空糸膜部に至る通
水路を形成するキャップ部とより構成されていることを
特徴とする水浄化カートリッジ。2. A water purification cartridge having a water inlet and a water outlet, in which a water purification treatment material is disposed, wherein the water purification cartridge has an outer case having an opening portion whose one side is cylindrical. A tubular inner case that is disposed inside the outer case and has both ends open, and a perforated plate portion that is disposed in the outer case and is provided on the outer periphery of one end of the inner case on the open portion side of the outer case, An inner case fixing portion provided on the outer case for watertightly fixing the outer periphery of one end of the inner case opposite to the open portion side of the outer case; and the outer case, the inner case and the perforated plate portion. An activated carbon portion formed between them, which is filled with activated carbon, a hollow fiber membrane portion in which a hollow fiber membrane is arranged in the inner case, and a passage which is provided near the other side of the outer case and is connected to the activated carbon portion. A water inlet and a water outlet connected to the hollow fiber membrane portion, and a cap portion that closes the opening of the outer case and forms a water passage extending from the perforated plate portion to the hollow fiber membrane portion. Water purification cartridge characterized by being.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7157381A JP2760960B2 (en) | 1995-06-23 | 1995-06-23 | Water purification cartridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7157381A JP2760960B2 (en) | 1995-06-23 | 1995-06-23 | Water purification cartridge |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63091493A Division JPH0651182B2 (en) | 1988-04-15 | 1988-04-15 | Water purifier |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9284845A Division JP2760977B2 (en) | 1997-10-17 | 1997-10-17 | Water purification cartridge |
| JP9284846A Division JP2760978B2 (en) | 1997-10-17 | 1997-10-17 | Water purification cartridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07323277A true JPH07323277A (en) | 1995-12-12 |
| JP2760960B2 JP2760960B2 (en) | 1998-06-04 |
Family
ID=15648410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7157381A Expired - Lifetime JP2760960B2 (en) | 1995-06-23 | 1995-06-23 | Water purification cartridge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2760960B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001300266A (en) * | 2000-04-24 | 2001-10-30 | Nok Corp | Hollow fiber membrane cartridge |
| JP4646282B2 (en) * | 2001-08-14 | 2011-03-09 | 三菱レイヨン株式会社 | Water purifier |
| CN112777770A (en) * | 2021-01-13 | 2021-05-11 | 李国平 | Portable outdoor micro-filtration purifier for water purification |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002239539A (en) * | 2001-02-22 | 2002-08-27 | Nok Corp | Water cleaning cartridge of water cleaning apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60220107A (en) * | 1984-04-17 | 1985-11-02 | Kurita Seibi Kk | Water purifier |
| JPS6122594U (en) * | 1984-07-17 | 1986-02-10 | 三菱レイヨン株式会社 | water purifier |
| JPS61139789U (en) * | 1985-02-15 | 1986-08-29 | ||
| JPS6332694U (en) * | 1986-08-18 | 1988-03-02 |
-
1995
- 1995-06-23 JP JP7157381A patent/JP2760960B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60220107A (en) * | 1984-04-17 | 1985-11-02 | Kurita Seibi Kk | Water purifier |
| JPS6122594U (en) * | 1984-07-17 | 1986-02-10 | 三菱レイヨン株式会社 | water purifier |
| JPS61139789U (en) * | 1985-02-15 | 1986-08-29 | ||
| JPS6332694U (en) * | 1986-08-18 | 1988-03-02 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001300266A (en) * | 2000-04-24 | 2001-10-30 | Nok Corp | Hollow fiber membrane cartridge |
| JP4646282B2 (en) * | 2001-08-14 | 2011-03-09 | 三菱レイヨン株式会社 | Water purifier |
| CN112777770A (en) * | 2021-01-13 | 2021-05-11 | 李国平 | Portable outdoor micro-filtration purifier for water purification |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2760960B2 (en) | 1998-06-04 |
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