JPS6214715B2 - - Google Patents
Info
- Publication number
- JPS6214715B2 JPS6214715B2 JP54126048A JP12604879A JPS6214715B2 JP S6214715 B2 JPS6214715 B2 JP S6214715B2 JP 54126048 A JP54126048 A JP 54126048A JP 12604879 A JP12604879 A JP 12604879A JP S6214715 B2 JPS6214715 B2 JP S6214715B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- inner cylinder
- piston
- suction
- discharge
- 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
- 238000005086 pumping Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims 2
- 238000010276 construction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Landscapes
- Reciprocating Pumps (AREA)
Description
【発明の詳細な説明】
本発明は流動物の圧送装置に関し、特に構築現
場等においてミキサー車から所要箇所に生コンク
リートを圧送するに好適な圧送装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pumping device for fluid, and particularly to a pumping device suitable for pumping fresh concrete from a mixer truck to a required location at a construction site or the like.
従来、構築現場等においてミキサー車から所要
の箇所に生コンクリートを圧送する場合には、第
１図に示す如く圧送ポンプを使用している。即
ち、ホツパー１の下方に油圧シリンダ２によつて
往復動するピストン３が内装されたシリンダ４を
設けると共に、シリンダ４の吸入口５と吐出口６
とに夫々弁装置７，８を付設しておき、この弁装
置７，８を互いに相反するように開閉動作を行わ
せしめ、かつピストン３をこの開閉動作に関連を
もつて往復動させる。この場合、弁装置７の開放
時にはホツパー１内に投入された生コンクリート
をシリンダ４内に吸入可能にピストン３を動作さ
せ、又弁装置８の開放時にはシリンダ４内の生コ
ンクリートを圧送すべくピストン３を動作させる
ものである。 BACKGROUND ART Conventionally, when fresh concrete is pumped from a mixer truck to a required location at a construction site, etc., a pressure pump is used as shown in FIG. That is, a cylinder 4 in which a piston 3 reciprocated by a hydraulic cylinder 2 is installed is provided below the hopper 1, and a suction port 5 and a discharge port 6 of the cylinder 4 are provided.
Valve devices 7 and 8 are attached to each of the valve devices, and the valve devices 7 and 8 are caused to perform opening and closing operations in opposition to each other, and the piston 3 is caused to reciprocate in relation to the opening and closing operations. In this case, when the valve device 7 is opened, the piston 3 is operated so that the ready-mixed concrete put into the hopper 1 can be sucked into the cylinder 4, and when the valve device 8 is opened, the piston 3 is operated so that the ready-mixed concrete in the cylinder 4 can be pumped. 3.
然るに各弁装置７，８を開閉動作させるには、
時間的な関連動作をもつて制御する必要があるこ
とから、その開閉機構が複雑となり、これに伴い
装置全体が大型化し、又この弁装置７，８の開閉
動作に関連させてピストン３を往復動させねばな
らず、機構の複雑化を助長する結果となつてい
た。このため、ミキサー車には前記の如く大型の
圧送ポンプを取付けることは容易でなく、従つて
通常は別に用意した圧送ポンプ車を介在させてミ
キサー車から所要の箇所に生コンクリートを圧送
しているのが実状であり、手数を要して作業性が
悪いことはもとより、コスト高ともなる等種々の
問題を有していた。 However, in order to open and close each valve device 7, 8,
Since it is necessary to control the valve devices 7 and 8 in a time-related manner, the opening/closing mechanism becomes complicated, and the overall size of the device increases accordingly. This resulted in an increase in the complexity of the mechanism. For this reason, it is not easy to attach a large pressure pump as mentioned above to the mixer truck, and therefore, a separately prepared pressure pump truck is usually used to force the fresh concrete from the mixer truck to the required location. This is the actual situation, and it has various problems such as not only being labor intensive and having poor workability, but also high cost.
本発明は上記事情に鑑み構成の簡易化と小型化
を図るべくなされたもので、シリンダ周壁及びこ
のシリンダ内を動力源より軸心方向に往復動する
有底の内筒周壁に、夫々軸方向に適宜間隔をおい
て吸入口と吐出口とを開口させ、前記シリンダ内
を内筒が往復動してシリンダ周壁及び内筒周壁の
各吸入口、乃至各吐出口を夫々一致させるべき開
閉動作と関連させて、内筒内に軸心方向に往復動
するピストンを嵌入させてなることを特徴とする
流動物の圧送装置を特徴とするものである。 In view of the above circumstances, the present invention has been made in order to simplify and downsize the configuration. An opening/closing operation in which the suction port and the discharge port are opened at appropriate intervals, and the inner cylinder reciprocates within the cylinder to align each suction port and each discharge port on the cylinder circumferential wall and the inner cylinder circumferential wall, respectively. Relatedly, the present invention is characterized by a fluid pumping device characterized by having a piston fitted into an inner cylinder that reciprocates in the axial direction.
以下、本発明に係る流動物の圧送装置の一実施
例を図面に基づき説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fluid pumping device according to the present invention will be described below with reference to the drawings.
上記圧送装置は、第２図に示す如く吸入口１３
の上方にホツパー１８を取付け、一方吐出口１５
には吐出ホースの装着部材１９を装着し、又シリ
ンダ１１、内筒１２及びピストン１７には夫々シ
ール材２０〜２２を装着しておき、前記内筒１２
はロツド１０を介して油圧シリンダ２３により、
又前記ピストン１７はピストン２４を介して油圧
シリンダ２５により前記の如く互いに関連性をも
つて往復動するようになつている。 The above-mentioned pressure feeding device has a suction port 13 as shown in FIG.
The hopper 18 is installed above the discharge port 15.
A discharge hose attachment member 19 is attached to the cylinder 11, the inner tube 12, and the piston 17, and sealants 20 to 22 are attached to the inner tube 12.
is caused by the hydraulic cylinder 23 via the rod 10,
The pistons 17 are reciprocated by a hydraulic cylinder 25 via a piston 24 in relation to each other as described above.
なお、吸入口１３，１４および吐出口１６は
夫々角型の開口として内筒１２およびピストン１
７の動きに対して吸入又は吐出量が過大に変化し
ないようにしてあり、かつ内筒１２の吸入口１４
及び吐出口１６がシリンダ１１のそれより径大に
形成させてある。また図中１７′，１２′は空気抜
孔である。 Note that the suction ports 13 and 14 and the discharge port 16 are rectangular openings that are connected to the inner cylinder 12 and the piston 1, respectively.
7, the suction or discharge amount does not change excessively with respect to the movement of the suction port 14 of the inner cylinder 12.
The discharge port 16 is formed to have a larger diameter than that of the cylinder 11. Further, in the figure, 17' and 12' are air vent holes.
この油圧シリンダ２３，２５の駆動制御装置
は、第４図に示す如く、モータＭの回転駆動によ
りオイルポンプＰを駆動してオイルタンク２６内
のオイルを汲出し、圧力制御弁２７を介して電磁
切換弁２８，２９に圧油を供給し、この電磁切換
弁２８，２９の切換動作により流量制御弁３０〜
３３を介して内筒１２及びピストン１７を往復動
させるべく夫々の油圧シリンダ２３，２５を駆動
する。前記圧力制御弁２７はストツプバルブ３４
を介して通油路に付設された圧力計３５をもつて
油圧シリンダ２３，２５を駆動するに必要な所定
の圧力に設定するものである。又流量制御弁３０
〜３３は内筒１２及びピストン１７の往復速度を
設定し、かつ等速を保持するためのものである。
前記の如く内筒１２及びピストン１７を往復動さ
せるべく電磁切換弁２８，２９によりオイルの流
れ方向を切換えるが、この電磁切換弁２８，２９
の切換え動作は、夫々内筒１２及びピストンロツ
ド２４に動作杆３６，３７を付設し、一方各動作
杆３６，３７と当接して動作する一対のマイクロ
スイツチ３８〜４１を夫々内筒１２及びピストン
１７の移動行程Ｌ，L′と同一間隔をもつて配して
おき、各マイクロスイツチ３８〜４１に夫々作動
杆３６，３７が当接したときにそのマイクロスイ
ツチ３８〜４１が動作して、リレー回路を介して
行われるようになつている。ところで、前記電磁
切換弁２８，２９を制御する場合に、前記の如き
マイクロスイツチ３８〜４１を使用することな
く、タイマー回路によつて時間制御するようにし
てもよいことはもとよりである。前記電磁切換弁
２８，２９からは夫々の油圧シリンダ２３，２５
の駆動に供したオイルがオイルタンク２６内に回
収され、又圧力制御弁２７からもオイルの一部が
オイルタンク２６内に回収されるようになつてい
る。更に前記圧力制御弁２７と各流量制御弁３０
〜３３との間には手動開閉弁４２を挿入してお
き、シリンダ１１内を水洗する場合等において、
予めこれを操作して内筒１２を及びピストン１７
を所定の位置（第２図において右端位置）まで滑
動させるものである。尚、第４図において、４３
は本装置を取付ける支持台、４４はマイクロスイ
ツチ３８，３９を取付ける取付板である。 As shown in FIG. 4, the drive control device for the hydraulic cylinders 23 and 25 drives an oil pump P by the rotational drive of a motor M to pump out oil in an oil tank 26, and pumps oil out of an oil tank 26 via an electromagnetic valve 27. Pressure oil is supplied to the switching valves 28 and 29, and the switching operation of the electromagnetic switching valves 28 and 29 causes the flow control valves 30 to 30 to
33, the respective hydraulic cylinders 23 and 25 are driven to reciprocate the inner cylinder 12 and piston 17. The pressure control valve 27 is a stop valve 34.
A pressure gauge 35 attached to the oil passage is used to set a predetermined pressure necessary to drive the hydraulic cylinders 23, 25. Also, the flow rate control valve 30
33 are for setting the reciprocating speed of the inner cylinder 12 and the piston 17 and maintaining the same speed.
As described above, in order to reciprocate the inner cylinder 12 and piston 17, the direction of oil flow is switched by the electromagnetic switching valves 28 and 29.
The switching operation is achieved by attaching operating rods 36 and 37 to the inner cylinder 12 and the piston rod 24, respectively, and on the other hand, a pair of micro switches 38 to 41 that operate in contact with the operating rods 36 and 37 are connected to the inner cylinder 12 and the piston 17, respectively. The micro switches 38 to 41 are arranged at the same intervals as the travel strokes L and L', and when the operating rods 36 and 37 come into contact with each micro switch 38 to 41, the micro switches 38 to 41 operate, and the relay circuit is activated. It is now being done through By the way, when controlling the electromagnetic switching valves 28 and 29, it is of course possible to use a timer circuit to control the time without using the micro switches 38 to 41 as described above. The electromagnetic switching valves 28 and 29 are connected to respective hydraulic cylinders 23 and 25.
The oil used for driving is recovered into the oil tank 26, and a portion of the oil from the pressure control valve 27 is also recovered into the oil tank 26. Furthermore, the pressure control valve 27 and each flow control valve 30
A manual on-off valve 42 is inserted between the cylinder 11 and the cylinder 11.
Operate this in advance to open the inner cylinder 12 and piston 17.
to a predetermined position (the right end position in FIG. 2). In addition, in Figure 4, 43
Reference numeral 44 indicates a support base on which the present device is mounted, and 44 a mounting plate on which the micro switches 38 and 39 are mounted.
上記本装置をミキサー車の後部に取付ける場合
には、第５図に示す如く前記シリンダ１１の後面
から支持材４５を突設し、この支持材の端面に断
面コ字状の装着部材４６を固設し、これをミキサ
ー車のフレーム等に嵌着してボルト締めにより固
定する。この場合、ミキサー車のエンジンを動力
とし、ドライビングシヤフトを介して前記オイル
ポンプＰを駆動するように構成する。 When this device is installed at the rear of a mixer truck, a support member 45 is provided protruding from the rear surface of the cylinder 11 as shown in FIG. This is then fitted onto the mixer truck frame, etc., and fixed with bolts. In this case, the engine of the mixer truck is used as power to drive the oil pump P via a driving shaft.
そして、第２図及び第３図に示す如く、シリン
ダ１１及び内筒１２には夫々軸心方向に適宜間隔
をおいて吸入口１３，１４と吐出口１５，１６と
を備え、内筒１２内に嵌入されたピストン１７の
往復動に伴い、前記内筒１２を往復動させ各吸入
口１３，１４が開口連通した時にシリンダ１１内
に生コンクリートを吸入し、又各吐出口１５，１
６が開口連通した時にシリンダ１１内から生コン
クリートを吐出させるものである。即ち、第３図
ａの如く各吸入口１３，１４が開口連通し、かつ
各吐出口１５，１６の閉塞時から、内筒１２を矢
印方向に滑動させ、又ピストン１７を矢印の如く
内筒１２に対し相反する方向に滑動させてその内
筒１２内への生コンクリートの吸入を開始させ
る。吸入行程の終了時には第３図ｂに示す如く内
筒１２が移動行程Ｌの1/2に達すると各吸入口１
３，１４が閉塞する。この場合、ピストン１７は
移動行程L′の1/2から限点に達して吸入を終了す
る。次いで、第３図ｃの如く内筒１２が移動行程
Ｌの限点に向け同一方向に滑動し、又ピストン１
７が移動行程L′の1/2に達するまで逆方向に滑動
すると、第３図ｄの如く各吐出口１５，１６が開
口連通して吐出行程が開始される。この吐出行程
では内筒１２が移動行程Ｌの限点から1/2に達す
るまで前記とは逆方向に滑動し、又ピストン１７
が移動行程L′の1/2から限点に達するまで前記と
は同一方向に滑動し、各吐出口１５，１６が閉塞
すると吐出行程が終了する。この吐出行程の終了
後は、第３図ｅの如き位置から前記第３図ａの如
き位置に吸入口１３，１４を開口連通さるべく移
動行程が行われる。 As shown in FIGS. 2 and 3, the cylinder 11 and the inner cylinder 12 are respectively provided with suction ports 13, 14 and discharge ports 15, 16 at appropriate intervals in the axial direction. With the reciprocation of the piston 17 fitted into the cylinder, the inner cylinder 12 is reciprocated, and when the suction ports 13 and 14 open and communicate with each other, fresh concrete is sucked into the cylinder 11, and the fresh concrete is sucked into the cylinder 11.
Fresh concrete is discharged from the inside of the cylinder 11 when the cylinder 6 opens and communicates with the cylinder 11. That is, from when the suction ports 13 and 14 are in open communication and the discharge ports 15 and 16 are closed as shown in FIG. 12 in the opposite direction to start sucking fresh concrete into the inner cylinder 12. At the end of the suction stroke, as shown in FIG. 3b, when the inner cylinder 12 reaches 1/2 of the travel stroke L, each suction port 1
3 and 14 are occluded. In this case, the piston 17 reaches the limit point from 1/2 of the travel stroke L' and ends suction. Next, as shown in FIG. 3c, the inner cylinder 12 slides in the same direction toward the limit of the travel stroke L, and the piston 1
7 slides in the opposite direction until it reaches 1/2 of the moving stroke L', the discharge ports 15 and 16 open and communicate with each other as shown in FIG. 3d, and the discharge stroke begins. In this discharge stroke, the inner cylinder 12 slides in the opposite direction until it reaches 1/2 from the limit point of the travel stroke L, and the piston 17
slides in the same direction as described above from 1/2 of the moving stroke L' until reaching the limit point, and when each discharge port 15, 16 is closed, the discharge stroke ends. After the discharge stroke is completed, a moving stroke is performed to open and communicate the suction ports 13 and 14 from the position shown in FIG. 3e to the position shown in FIG. 3a.
前記吸入行程及び吐出行程では、内筒１２及び
ピストン１７が互いに相反する方向に滑動して吸
入及び吐出動作を行うが、吸入口１３，１４又は
吐出口１５，１６が開口連通させた状態で内筒１
２の移動を停止させ、この状態の時にピストン１
７の吸込み及び圧縮動作で吸入行程及び吐出行程
を行うようにしてもよい。 In the suction stroke and the discharge stroke, the inner cylinder 12 and the piston 17 slide in opposite directions to perform the suction and discharge operations, but the inner cylinder 12 and the piston 17 slide in opposite directions to perform the suction and discharge operations. Cylinder 1
Stop the movement of piston 2, and in this state piston 1
The suction stroke and the discharge stroke may be performed by the suction and compression operations in step 7.
以上の如く本発明に係る流動物の圧送装置によ
れば、内筒を往復動させるのみで吸入口及び吐出
口を開閉させることができ、かつ吸入口及び吐出
口の開閉動作に関連させてピストンを往復動させ
ればよいことから、その駆動制御機構の構成が簡
単で、かつ小型に形成し得、従つてミキサー車の
後部にそのまま取付けできて、しかもミキサー車
自体大型化せず、従来の如くミキサー車の他に別
に圧送ポンプ車を容易する必要もない等の利便性
を有し、又圧送ポンプ車として使用するとしても
従来の如きものに比し、小型化し得る。 As described above, according to the fluid pressure feeding device according to the present invention, the suction port and the discharge port can be opened and closed simply by reciprocating the inner cylinder, and the piston is connected to the opening and closing operation of the suction port and the discharge port. Because it only needs to be reciprocated, the structure of the drive control mechanism is simple and compact, and it can be attached to the rear of the mixer truck as is, and the mixer truck itself does not become larger, making it easier to use than conventional The present invention is convenient in that there is no need to provide a pressure pump car in addition to the mixer car, and even if it is used as a pressure pump car, it can be made smaller compared to conventional ones.
つまり、シリンダ内を内筒が、又内筒内をピス
トンが夫々往復動し、かつ内筒が少なくとも該内
筒の吸入口乃至吐出口とシリンダの吸入口乃至吐
出口をそれぞれ一致させるのみの開閉弁としての
移動で足り、このため、極めて小型化でき、しか
も、直接外部から流動物を内筒内に吸入し、又内
筒内から外部に圧送でき、かつ吸入及び吐出系路
が径大で、しかも流通抵抗も小さいために、水等
の液体はもとより径大な骨材が混入するコンクリ
ートやスラングを含む油材等の圧送もでき、超小
型であることと相俟つてコンクリートポンプとし
て既設のミキサー車に何等改造することなく搭載
でき、かつコンクリートポンプ等粒材を含む流動
物のポンプとして使用した際に水を吸入し又吐出
させることで水洗も容易にでき、又超小型である
にも拘らず、一行程で略内筒の内容物に見合う多
くの吸入乃至吐出量が得られ、しかも圧送圧も高
い等使用上頗る便利である。 In other words, the inner cylinder reciprocates inside the cylinder, and the piston reciprocates inside the inner cylinder, and the inner cylinder opens and closes only by aligning at least the suction port or discharge port of the inner cylinder with the suction port or discharge port of the cylinder. It suffices to move as a valve, so it can be extremely miniaturized, and moreover, it can directly suck fluid into the inner cylinder from the outside and forcefully feed it from the inner cylinder to the outside, and the suction and discharge lines have large diameters. Furthermore, because the flow resistance is low, it is possible to pump not only liquids such as water, but also concrete containing large-diameter aggregates, oil materials containing slang, etc., and in combination with its ultra-compact size, it can be used as a concrete pump. It can be installed on a mixer truck without any modification, and when used as a pump for fluids containing granular materials such as concrete pumps, it can be easily washed by sucking in and discharging water, and it is also ultra-compact. Regardless, a large amount of suction or discharge can be obtained in one stroke, approximately corresponding to the contents of the inner cylinder, and the pumping pressure is also high, making it very convenient to use.
第１図は生コンクリートを圧送する圧送ポンプ
の概略断面図、第２図は本発明に係る流動物の圧
送装置の一実施例を示す断面図、第３図ａ〜ｅは
その動作状態を示す行程図、第４図はその油圧回
路図、第５図はその装置の側面図である。
１１……シリンダ、１２……内筒、１３，１４
……吸入口、１５，１６……吐出口、１７……ピ
ストン、２３，２５……油圧シリンダ。
Fig. 1 is a schematic sectional view of a pressure pump for pumping fresh concrete, Fig. 2 is a sectional view showing an embodiment of a fluid pumping device according to the present invention, and Figs. 3 a to e show its operating state. FIG. 4 is a hydraulic circuit diagram, and FIG. 5 is a side view of the device. 11... Cylinder, 12... Inner cylinder, 13, 14
... Suction port, 15, 16 ... Discharge port, 17 ... Piston, 23, 25 ... Hydraulic cylinder.
Claims (1)
より軸心方向に往復動する有底の内筒周壁に、
夫々軸心方向に適宜間隔をおいて吸入口と吐出口
とを開口させ、前記シリンダ内を内筒が往復動し
てシリンダ周壁及び内筒周壁の各吸入口、乃至各
吐出口を夫々一致させるべき開閉動作と関連させ
て、内筒内に軸心方向に往復動するピストンを嵌
入させてなることを特徴とする流動物の圧送装
置。1 A cylinder peripheral wall and a bottomed inner cylinder peripheral wall that reciprocates in the axial direction within this cylinder by a power source,
The suction port and the discharge port are opened at appropriate intervals in the axial direction, and the inner cylinder reciprocates within the cylinder to align the suction ports and the discharge ports on the cylinder circumferential wall and the inner cylinder circumferential wall, respectively. 1. A device for pumping a fluid, characterized in that a piston that reciprocates in an axial direction is fitted into an inner cylinder in conjunction with opening and closing operations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12604879A JPS5652322A (en) | 1979-09-29 | 1979-09-29 | Method and device for conveying fluid under pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12604879A JPS5652322A (en) | 1979-09-29 | 1979-09-29 | Method and device for conveying fluid under pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5652322A JPS5652322A (en) | 1981-05-11 |
| JPS6214715B2 true JPS6214715B2 (en) | 1987-04-03 |
Family
ID=14925352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12604879A Granted JPS5652322A (en) | 1979-09-29 | 1979-09-29 | Method and device for conveying fluid under pressure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5652322A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829179U (en) * | 1981-08-21 | 1983-02-25 | 東洋特殊機械株式会社 | Pumping device |
| JPS5870471U (en) * | 1981-11-05 | 1983-05-13 | 東洋特殊機械株式会社 | Pumping device |
| JPS58137883U (en) * | 1982-03-12 | 1983-09-16 | 西原 義晃 | fluid discharge device |
| JPS58191004A (en) * | 1982-04-30 | 1983-11-08 | Shimadzu Corp | Searching circuit of extreme value |
| JPS6170178A (en) * | 1984-09-13 | 1986-04-10 | Noiberuku Kk | Discharge pump |
| DE3535669A1 (en) * | 1985-10-05 | 1987-04-16 | Draegerwerk Ag | PISTON DOSING PUMP |
| JP2001107844A (en) * | 1999-10-07 | 2001-04-17 | Nikkiso Eiko Kk | Reciprocating pump |
| KR100654899B1 (en) | 2005-09-29 | 2006-12-06 | 한성수 | Pump for discharging paint forcibly |
-
1979
- 1979-09-29 JP JP12604879A patent/JPS5652322A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5652322A (en) | 1981-05-11 |
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