JPS6346354B2 - - Google Patents
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- Publication number
- JPS6346354B2 JPS6346354B2 JP5703984A JP5703984A JPS6346354B2 JP S6346354 B2 JPS6346354 B2 JP S6346354B2 JP 5703984 A JP5703984 A JP 5703984A JP 5703984 A JP5703984 A JP 5703984A JP S6346354 B2 JPS6346354 B2 JP S6346354B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- pressure
- valve
- container
- 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
Links
- 239000000843 powder Substances 0.000 claims description 57
- 238000000034 method Methods 0.000 claims description 10
- 238000007791 dehumidification Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Drying Of Solid Materials (AREA)
Description
【発明の詳細な説明】
本発明は粉体を乾燥除湿する方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for drying and dehumidifying powder.
例えば還元鉄粉のような金属粉は、湿気を含ん
だまま袋詰しておくと使用するまでの期間内に錆
が発生し好ましくない。また麦粉などの食料粉に
おいても湿気により『かび』が発生し、好ましく
ない。 For example, if metal powder such as reduced iron powder is packaged in a bag while still containing moisture, rust will occur before use, which is undesirable. Furthermore, food flour such as wheat flour can also become moldy due to moisture, which is undesirable.
粉体の乾燥または除湿方法としては加熱による
乾燥方法（例えば熱風による乾燥方法）がある
が、多量のエネルギーが必要であり、また粉体の
種類によつては、変質の恐れもある。 As a method for drying or dehumidifying powder, there is a drying method by heating (for example, drying by hot air), but this requires a large amount of energy and, depending on the type of powder, there is a risk of deterioration.
他に吸湿剤（例えばシリカゲル）による乾燥除
湿方法があるが、多量の粉体を均一に乾燥するに
は不向きであり、また、後工程で、吸湿剤を取り
除く作業が必要となる。 There is another method of drying and dehumidifying using a moisture absorbent (for example, silica gel), but it is not suitable for uniformly drying a large amount of powder, and also requires work to remove the moisture absorbent in a subsequent process.
本発明は、多量の粉体を、熱を用いずに、均一
に乾燥除湿する方法を提供するものである。 The present invention provides a method for uniformly drying and dehumidifying a large amount of powder without using heat.
本発明の要旨とするところは密閉容器内に粉体
を装入し、該粉体を撹拌すると共に湿度の低い気
体を前記容器内に圧入して所定の容器内圧まで昇
圧し、次いで該気体を大気に放出して所定の容器
内圧まで復圧し、以上の昇圧、復圧の操作を必要
回数繰り返すことを特徴とする粉体の除湿方法で
ある。 The gist of the present invention is to charge powder into a closed container, stir the powder, and pressurize a low-humidity gas into the container to increase the internal pressure of the container to a predetermined pressure. This method of dehumidifying powder is characterized by releasing the powder into the atmosphere, restoring the pressure inside the container to a predetermined pressure, and repeating the above pressure raising and pressure restoring operations as many times as necessary.
以下、第１図に示した本発明を好適に実施する
ことのできる系統図によつて、本発明の実施例を
詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to a system diagram shown in FIG. 1 in which the present invention can be preferably implemented.
圧縮空気源１にはコンプレツサ（図示省略）に
より発生させた圧縮空気が供給されており、必要
量だけ常時使用することが可能となつている。 The compressed air source 1 is supplied with compressed air generated by a compressor (not shown), and can be used at all times in the required amount.
除湿空気発生装置（以下エアドライヤと呼ぶ）
２は圧縮空気中より水分を除去し、低露点すなわ
ち絶対湿度の低い空気を作り出すものである。エ
アドライヤ２には、いくつかの方式、例えば冷凍
式、吸着式などがあるが、どの程度の乾燥度の空
気が必要かによつて公知の適当な装置を選定すれ
ばよい。 Dehumidified air generator (hereinafter referred to as air dryer)
2 removes moisture from compressed air to create air with a low dew point, that is, low absolute humidity. There are several types of air dryers 2, such as refrigeration type and adsorption type, but an appropriate known device may be selected depending on how dry the air is required.
エアドライヤ２の下流には圧縮空気中の固形物
および油分を除去するためのフイルタ３があり、
さらに減圧弁４、流量調節弁５、気体封入用バル
ブ６、クツシヨンタンク８を備える。クツシヨン
タンク８の下流の配管１１は２つに分岐してお
り、その一方は撹拌装置（本実施例ではダブルコ
ーンミキサ）１３に、他方は気体放出用バルブ７
に接続されている。撹拌装置１３との接続は軸１
７ａの先端に取付けたロータリジヨイント２４に
フレキシブルホース１２を介してなされている。
このようにして胴体１４内に空気を封入すること
ができる。 There is a filter 3 downstream of the air dryer 2 for removing solids and oil from the compressed air.
Furthermore, a pressure reducing valve 4, a flow control valve 5, a gas filling valve 6, and a cushion tank 8 are provided. A pipe 11 downstream of the cushion tank 8 branches into two parts, one of which is connected to a stirring device (double cone mixer in this example) 13, and the other to a gas release valve 7.
It is connected to the. Connection with stirring device 13 is through shaft 1
A flexible hose 12 is connected to a rotary joint 24 attached to the tip of the tube 7a.
In this way, air can be sealed within the body 14.
気体放出用バルブ７の放出側には粉体が一緒に
排出されバグフイルタで捕集できるようにしてお
くことが好ましい。また、クツシヨンタンク８に
は圧力スイツチ９が取付けられており、設定圧力
下限により気体封入用バルブ６を開くとともに気
体放出用バルブ７を閉じ、設定圧力上限により気
体封入用バルブ６を閉じるとともに気体放出用バ
ルブ７を開く。以上の制御は圧力スイツチ９から
の信号により制御盤１０を介して行われ、制御盤
１０には封入、放出動作の繰り返し回数を任意に
設定できる機能が付加されている。なお、設定圧
力に加圧した後、放出するまでの時間間隔はタイ
マによつて任意に調整することが可能である。 It is preferable that powder is also discharged from the discharge side of the gas discharge valve 7 so that it can be collected by a bag filter. Further, a pressure switch 9 is attached to the cushion tank 8, which opens the gas filling valve 6 and closes the gas release valve 7 at the lower limit of the set pressure, and closes the gas filling valve 6 and releases the gas at the upper limit of the set pressure. Open the discharge valve 7. The above control is performed via the control panel 10 based on signals from the pressure switch 9, and the control panel 10 is provided with a function to arbitrarily set the number of repetitions of the filling and discharging operations. Note that the time interval from pressurization to the set pressure until release can be arbitrarily adjusted using a timer.
ダブルコーンミキサ１３の胴体１４は軸１７お
よび１７ａを備え、軸受１８および１８ａによつ
て支持され、モータ２０によつて減速機１９を介
して回転される。 The body 14 of the double cone mixer 13 includes shafts 17 and 17a, is supported by bearings 18 and 18a, and is rotated by a motor 20 via a speed reducer 19.
胴体１４には、粉体投入用バルブ１５および粉
体排出用バルブ１６が対向して設けられており、
粉体２３を粉体投入用シユート２１より胴体１４
内に投入する際には、粉体投入用バルブ１５のみ
を開とし、回転中はいずれも閉とし、粉体１３を
胴体１４から排出する際には粉体排出用バルブ１
６のみを開として、粉体排出用シユート２２に排
出する。なお、ダブルコーンミキサ１３は第１図
に示すような上下関係位置で常に停止するように
なつている。すなわち、粉体投入用バルブ１５が
上に、粉体排出用バルブ１６が下になつて、それ
ぞれシユート２１，２２に対面する位置に停止す
る。 The body 14 is provided with a powder input valve 15 and a powder discharge valve 16 facing each other.
The powder 23 is transferred from the powder injection chute 21 to the body 14.
When charging the powder 13 from the body 14, only the powder input valve 15 is opened, and both are closed during rotation, and when discharging the powder 13 from the body 14, the powder discharge valve 1 is opened.
6 is opened and the powder is discharged into the powder discharge chute 22. The double cone mixer 13 is always stopped at the vertical position shown in FIG. That is, they are stopped at positions facing the chute 21 and 22, respectively, with the powder input valve 15 at the top and the powder discharge valve 16 at the bottom.
次に本発明方法の工程を説明する。 Next, the steps of the method of the present invention will be explained.
ダブルコーンミキサ１３を第１図に示す状態で
停止しておき、粉体投入用バルブ１５を開にし
て、被乾燥粉体２３を粉体投入用シユート２１よ
り胴体１４内に投入する。 The double cone mixer 13 is stopped in the state shown in FIG. 1, the powder charging valve 15 is opened, and the powder to be dried 23 is charged into the body 14 from the powder charging chute 21.
粉体２３の投入が終つたら、粉体投入バルブ１
５を閉にして、モータ２０を駆動し、減速機１９
を介して、ダブルコーンミキサ１３を回転させ、
粉体２３の撹拌を始めると同時に制御盤１０上の
スタートボタンを押す。 After the powder 23 has been added, turn the powder injection valve 1
5 is closed to drive the motor 20 and reducer 19.
Rotate the double cone mixer 13 via
At the same time as starting stirring of the powder 23, the start button on the control panel 10 is pressed.
これにより、気体封入用バルブ６が閉から開状
態に変り、除湿した空気が配管１１、フレキシブ
ルホース１２を介して、軸１７ａから、胴体１４
内に入つて行き、粉体２３と混り合い、胴体１４
内圧力が上昇していく。 As a result, the gas filling valve 6 changes from the closed state to the open state, and the dehumidified air is passed through the pipe 11 and the flexible hose 12 from the shaft 17a to the body 14.
It enters the interior, mixes with the powder 23, and forms the body 14.
Internal pressure increases.
そして、圧力スイツチ９でセツトした上限値に
達すると、気体封入用バルブ６を閉にし、瞬時あ
るいは一定時間後に気体放出用バルブ７を閉状態
から開状態に切り替え、胴体１４内の空気の放出
を開始する。空気の放出により胴体１４内の圧力
が下り圧力スイツチ９でセツトした下限値に達す
ると気体放出用バルブ７を閉に切り替え放出を終
了する。 When the upper limit set by the pressure switch 9 is reached, the gas filling valve 6 is closed, and the gas release valve 7 is switched from the closed state to the open state instantly or after a certain period of time, and the air in the fuselage 14 is released. Start. When the pressure inside the body 14 decreases due to the release of air and reaches the lower limit set by the pressure switch 9, the gas release valve 7 is closed to end the release.
以上の気体封入、放出すなわち胴体１４の内圧
の昇圧、復圧を制御盤１０で設定した回数だけ繰
り返し、粉体２３の除湿処理を完了したら、モー
タ２０を停止し、粉体排出用バルブ１６を開に
し、粉体排出用シユート２２より粉体２３を排出
し、除湿作業を完了する。 The above gas filling and releasing, that is, increasing and restoring the internal pressure of the body 14, is repeated the number of times set on the control panel 10, and when the dehumidification process of the powder 23 is completed, the motor 20 is stopped and the powder discharge valve 16 is closed. The powder 23 is discharged from the powder discharge chute 22, and the dehumidification work is completed.
さらに、別の粉体を乾燥除湿するには、粉体排
出用バルブ１６を閉、粉体投入用バルブ１５を開
にして、再び粉体投入、胴体回転、空気封入、空
気放出および粉体排出という作業を繰り返す。 Furthermore, to dry and dehumidify another powder, close the powder discharge valve 16, open the powder input valve 15, and then input the powder again, rotate the body, fill in air, release air, and discharge the powder. Repeat this process.
粉体２３を胴体１４内に投入する前に、除湿空
気による昇圧、復圧の操作を予め行つておくこと
により、事前に胴体１４内の雰囲気を除湿空気で
置換しておくことも有効である。 It is also effective to replace the atmosphere inside the body 14 with dehumidified air in advance by carrying out pressurization and pressure recovery operations using dehumidified air before introducing the powder 23 into the body 14. .
次に本発明による除湿効果を具体的数値を用い
て説明する。 Next, the dehumidification effect according to the present invention will be explained using specific numerical values.
(1) 初期条件 (イ) 容積および湿度（温度は全て同じ） 胴体容器：容積Vc＝10m3 絶対湿度xc＝20ｇ／m3 投入粉体：容積Vf＝４m3 絶対湿度xf＝20ｇ／m3 投入除湿空気：容積Va＝３m3 絶対湿度xa＝１ｇ／m3 同上（粉体投入前）：容積Vb＝５m3 絶対湿度xb＝１ｇ／m3 (ロ) 操作圧力 封入前、放出後圧力（大気圧）： Po＝1.0Kg／cm2 abs 封入後圧力：P1＝1.5Kg／cm2 abs (2) 事前置換（粉体投入前） (イ) 封入後 空気量：Vop＝Vc＋Vb ＝10＋５ ＝15m3（大気圧換算） 容器内水分量：Xop＝Vcxc＋Vbxb ＝10×20＋５×１ ＝205ｇ (ロ) 放出後 空気量： Vo＝10m3 容器内水分量：Xo＝Xop×Vo／Vop ＝205×10／15 ＝137ｇ xo＝Xo／Vo ＝137／10 ＝13.7ｇ／m3 (3) 粉体投入時 粉体中水分量：Xf＝Vfxf＝４×20 ＝80ｇ 空気中水分量：Xc＝（Vc−Vf）xo ＝（10−４）×13.7 ＝82ｇ 容器内水分量：X1＝Xf＋Xc ＝80＋82＝162ｇ x1＝X1／Vo ＝162／10 ＝16.2ｇ／m3 (4) 粉体投入後１回目 (イ) 封入後 空気量：V2p＝（Vc−Vf）＋Va ＝（10−４）＋３＝９m3 容器内充填量V2q＝V2p＋Vf ＝９＋４＝13m3 容器内水分量：X2q＝X1＋Vaxa ＝162＋３×１ ＝165ｇ (ロ) 放出後 容器内充填量：V2＝Vo＝10m3 容器内水分量：X2＝X2q×V2／V2q ＝165×10／13 ＝127ｇ x2＝X2／V2 ＝127÷10 ＝12.7ｇ／m3 (5) 粉体投入後２回目 (イ) 封入後 空気量：V3p＝V2p＝９m3 容器内充填量V3q＝V2q＋13m3 容器内水分量：X3q＝X2＋Vaxa ＝127＋３×１ ＝130ｇ (ロ) 放出後 容器内充填量：V3＝V2＝10m3 容器内水分量：X3＝X3q×V3／V3q ＝130×10／13 ＝100ｇ x3＝X3／V3 ＝100÷10 ＝10ｇ／m3 以上の計算例では、 投入前： xc＝20ｇ／m3 投入時： x1＝16.2ｇ／m3 投入後１回目：x2＝12.7ｇ／m3 投入後２回目：x3＝10ｇ／m3 となる。(1) Initial conditions (a) Volume and humidity (all temperatures are the same) Body container: Volume Vc = 10 m 3 Absolute humidity xc = 20 g/m 3 Input powder: Volume Vf = 4 m 3 Absolute humidity xf = 20 g/m 3 Input dehumidified air: Volume Va = 3 m 3 Absolute humidity xa = 1 g/m 3 Same as above (before powder injection): Volume Vb = 5 m 3 Absolute humidity xb = 1 g/m 3 (b) Operating pressure Before filling, pressure after discharge ( Atmospheric pressure): Po=1.0Kg/cm 2 abs Pressure after filling: P 1 = 1.5Kg/cm 2 abs (2) Pre-displacement (before powder injection) (a) Air amount after filling: Vop=Vc+Vb =10+5= 15m 3 (converted to atmospheric pressure) Moisture content in container: Xop=Vcxc+Vbxb =10×20+5×1 =205g (b) Amount of air after release: Vo=10m 3Moisture content in container: Xo=Xop×Vo/Vop =205× 10/15 = 137g xo = Xo/Vo = 137/10 = 13.7g/m 3 (3) When adding powder Moisture content in powder: Xf = Vfxf = 4 x 20 = 80g Moisture content in air: Xc = ( Vc-Vf)xo = (10-4) x 13.7 = 82g Moisture content in container: X 1 = Xf + 1st time after charging (a) Amount of air after filling: V 2 p = (Vc - Vf) + Va = (10 - 4) + 3 = 9 m Filled amount in 3 containers V 2 q = V 2 p + Vf = 9 + 4 = 13 m In 3 containers Moisture content: X 2 q = X 1 + Vaxa = 162 + 3 × 1 = 165 g (b) Amount filled in the container after release: V 2 = Vo = 10 m 3 Moisture content in the container: X 2 = X 2 q × V 2 /V 2 q = 165×10 / 13 = 127g x 2 = p= 9m Volume filled in 3 containers V 3 q =V 2 q+13m Moisture content in 3 containers : 10m 3 Moisture content in container: X 3 = X 3 q×V 3 /V 3 q = 130 × 10 / 13 = 100g x 3 = , Before adding: xc = 20g/m When adding 3 : x 1 = 16.2g/m 1st time after adding 3: x 2 = 12.7g/m 2nd time after adding 3: x 3 = 10g/m 3 .
封入、放出の繰り返し回数を増すことにより、
粉体の乾燥度をさらに高めることができる。 By increasing the number of repetitions of encapsulation and release,
The degree of dryness of the powder can be further increased.
計算から分るように、１回当りの投入除湿空気
を多くすることができれば、すなわち密閉容器の
強度上許されるならば、もつと圧力を高くするこ
とにより除湿能力が向上する。 As can be seen from the calculations, if it is possible to increase the amount of dehumidified air input per time, that is, if the strength of the closed container allows it, the dehumidification capacity can be improved by increasing the pressure.
また、もつと水分量の少ない除湿空気を使用す
ることによつても除湿能力は向上する。 Furthermore, the dehumidification ability can also be improved by using dehumidified air with a lower moisture content.
ただし、昇圧し過ぎると、密閉容器内に凝縮水
が発生する。これをきらう粉体を処理する場合に
は、それ以下の圧力で回数を多く行うことにより
所定の乾燥度を得る必要がある。さらに乾燥した
粉体を密閉容器から排出する際、大気から吸湿す
るので、密閉容器設置場所を除湿雰囲気にしてお
くことが好ましい。 However, if the pressure is increased too much, condensed water will form inside the closed container. When processing powder that does not like this, it is necessary to obtain a predetermined degree of dryness by performing the drying process many times at a lower pressure. Further, when the dried powder is discharged from the closed container, it absorbs moisture from the atmosphere, so it is preferable to keep the place where the closed container is installed in a dehumidified atmosphere.
第１図は本発明を好適に実施することができる
装置の系統図である。
１…圧縮空気源、２…除湿空気発生装置（エア
ドライヤ）、３…フイルタ、４…減圧弁、５…流
量調節弁、６…気体封入用バルブ、７…気体放出
用バルブ、８…クツシヨンタンク、９…圧力スイ
ツチ、１０…制御盤、１１…配管、１２…フレキ
シブルホース、１３…撹拌装置（ダブルコーンミ
キサ）、１４…胴体、１５…粉体投入用バルブ、
１６…粉体排出用バルブ、１７，１７ａ…軸、１
８，１８ａ…軸受、１９…減速機、２０…モー
タ、２１…粉体投入用シユート、２２…粉体排出
用シユート、２３…粉体、２４…ロータリージヨ
イント。
FIG. 1 is a system diagram of an apparatus that can suitably carry out the present invention. 1... Compressed air source, 2... Dehumidified air generator (air dryer), 3... Filter, 4... Pressure reducing valve, 5... Flow rate adjustment valve, 6... Gas filling valve, 7... Gas discharge valve, 8... Cushion tank , 9... Pressure switch, 10... Control panel, 11... Piping, 12... Flexible hose, 13... Stirring device (double cone mixer), 14... Body, 15... Valve for powder injection,
16...Powder discharge valve, 17, 17a...Shaft, 1
8, 18a...bearing, 19...reducer, 20...motor, 21...powder input chute, 22...powder discharge chute, 23...powder, 24...rotary joint.
Claims (1)
ると共に湿度の低い気体を前記容器内に圧入して
所定の容器内圧まで昇圧し、次いで該気体を大気
に放出して所定の容器内圧まで復圧し、以上の昇
圧、復圧の操作を必要回数繰り返すことを特徴と
する粉体の除湿方法。1 Powder is charged into a closed container, the powder is stirred, and low humidity gas is pressurized into the container to increase the internal pressure of the container to a predetermined pressure, and then the gas is released to the atmosphere to achieve a predetermined pressure. A powder dehumidification method characterized by restoring the pressure to the internal pressure of the container and repeating the above pressure raising and pressure restoring operations as many times as necessary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5703984A JPS60200075A (en) | 1984-03-24 | 1984-03-24 | Dehumidifying method of powdered body by pressure rise and pressure return |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5703984A JPS60200075A (en) | 1984-03-24 | 1984-03-24 | Dehumidifying method of powdered body by pressure rise and pressure return |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60200075A JPS60200075A (en) | 1985-10-09 |
| JPS6346354B2 true JPS6346354B2 (en) | 1988-09-14 |
Family
ID=13044300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5703984A Granted JPS60200075A (en) | 1984-03-24 | 1984-03-24 | Dehumidifying method of powdered body by pressure rise and pressure return |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60200075A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01177148U (en) * | 1988-06-02 | 1989-12-18 |
-
1984
- 1984-03-24 JP JP5703984A patent/JPS60200075A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01177148U (en) * | 1988-06-02 | 1989-12-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60200075A (en) | 1985-10-09 |
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