JP2553785B2 - Device for absorbing floating matter on the liquid surface - Google Patents
Device for absorbing floating matter on the liquid surfaceInfo
- Publication number
- JP2553785B2 JP2553785B2 JP3217419A JP21741991A JP2553785B2 JP 2553785 B2 JP2553785 B2 JP 2553785B2 JP 3217419 A JP3217419 A JP 3217419A JP 21741991 A JP21741991 A JP 21741991A JP 2553785 B2 JP2553785 B2 JP 2553785B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid surface
- suction port
- liquid
- level
- suspended matter
- 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
- Removal Of Floating Material (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、廃液貯溜槽などの液面
上に浮遊した油類や塗料カス等の浮遊物を吸込管で吸い
取る液面上浮遊物の吸取装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for sucking floating substances on a liquid surface, which sucks floating substances such as oils and paint dregs floating on the liquid surface of a waste liquid storage tank by a suction pipe.
【０００２】[0002]
【従来の技術】この種の吸取装置は、液中から液面に向
かって延びる吸込管の先端に、液面上の浮遊物を吸い取
る吸取口が設けられ、この吸取口は、なるべく空気や液
体を吸い込まずに浮遊物だけを効率良く吸い込めるよう
にするため、液面のレベル変化を検出してそのレベル変
化に追従するフロートによって液面位置に保持させるも
のが一般的である（特公昭４７−１３２１５号，実公昭
５６−２００７４号，実開昭５７−９３８１号，特開昭
６３−１６２０９３号）。2. Description of the Related Art A suction device of this type is provided with a suction port for sucking suspended matter on the liquid surface at the tip of a suction pipe extending from the liquid toward the liquid surface. In order to efficiently suck only the suspended matter without sucking the liquid, it is common to detect the level change of the liquid level and hold it at the liquid level position by the float that follows the level change (Japanese Patent Publication No. 47). -13215, Japanese Utility Model Publication 56-20074, Japanese Utility Model Publication 57-9381, and Japanese Patent Application Laid-Open No. 63-162093).
【０００３】[0003]
【発明が解決しようとする課題】しかし、液面に浮かぶ
フロートは、風波の影響を受けて動揺しやすく、特に台
風などの強風によって液面が大きなうねりを生ずると、
左右に大きく傾いたり、激しい上下変動を繰り返すか
ら、吸取口が液面位置から完全に離脱するように突出し
て、その吸取口からは液面上の浮遊物が吸い込まれず
に、空気だけが多量に吸い込まれることがある。そし
て、吸取口から多量の空気が吸い込まれると、液中から
液面に向かって延びた吸込管の管内が完全に空洞化し
て、その吸込管全体が大きな浮力を受けて液面に浮き上
がり、それによりフロートが転倒するなどして吸取口が
液面上に突出したまま元に戻らなくなってしまうおそれ
があった。However, a float floating on the liquid surface is easily shaken under the influence of wind waves, and especially when a strong wind such as a typhoon causes a large swell on the liquid surface.
Because it leans greatly to the left and right, and repeats severe up and down fluctuations, the suction port protrudes so as to completely separate from the liquid surface position, and suspended matter on the liquid surface is not sucked in from the suction port, and only a large amount of air is drawn. May be inhaled. Then, when a large amount of air is sucked from the suction port, the inside of the suction pipe extending from the liquid toward the liquid surface is completely hollowed out, and the whole suction pipe receives a large buoyancy and floats on the liquid surface. As a result, the float may fall over and the suction port may not return to its original state while protruding above the liquid surface.
【０００４】なお、吸取口を液面上に突出させないため
に、錘を付ける工夫もなされているが、錘を付けるとフ
ロートの浮力が低下するので、そのフロートの上下変動
により吸取口が液中に完没して液体だけを多量に吸い込
むおそれがある。そこで本発明は、風波の影響を受けず
に、吸込管の先端に設けられた吸取口を液面位置に確実
に保持できるようにすることを技術的課題としている。Although a weight has been devised to prevent the suction port from projecting above the liquid surface, the weight of the float reduces the buoyancy of the float, and the vertical movement of the float causes the suction port to be submerged in the liquid. There is a risk that it will completely sink into and will inhale only a large amount of liquid. Therefore, it is a technical object of the present invention to ensure that the suction port provided at the tip of the suction pipe can be held at the liquid surface position without being affected by wind waves.
【０００５】[0005]
【課題を解決するための手段】この課題を解決するため
に、本発明は、液中から液面に向かって延びる吸込管の
先端に、液面上の浮遊物を吸い取る吸取口が設けられた
液面上浮遊物の吸取装置において、前記吸取口と一体的
に上下動可能に設けられたレベル計と、当該レベル計で
検出した液面のレベル変化に応じて前記吸取口を上下さ
せる位置調節信号を出力する制御装置と、その位置調節
信号に基づいて前記吸取口を液面位置に保持するように
上下動させる昇降駆動装置とを具備したことを特徴とす
る。In order to solve this problem, according to the present invention, a suction port for sucking suspended matter on the liquid surface is provided at the tip of a suction pipe extending from the liquid toward the liquid surface. In a device for sucking suspended matter on a liquid surface, a level meter provided so as to be vertically movable integrally with the suction port, and position adjustment for moving the suction port up and down according to the level change of the liquid level detected by the level meter. It is characterized by comprising a control device for outputting a signal and an elevating / lowering device for vertically moving the suction port so as to hold the suction port at the liquid surface position based on the position adjustment signal.
【０００６】[0006]
【作用】本発明によれば、液面のレベルが変化すると、
液面上の浮遊物を吸い取る吸取口と一体的に上下動可能
に設けられたレベル計がそのレベル変化を検出して、制
御装置がそのレベル変化に応じた位置調節信号を出力
し、その位置調節信号に基づいて昇降駆動装置が吸取口
を上下動させることにより、その吸取口が常に液面位置
に保持される。したがって、液面に浮かべたフロートで
液面のレベル変化を検出してその変化に追従する従来例
のように、風波の影響を受けて吸取口が液面から離脱す
るというおそれはなくなり、その吸取口を液面位置に確
実に保持することができる。According to the present invention, when the liquid level changes,
A level meter that can move up and down integrally with the suction port that sucks up suspended matter on the liquid level detects the level change, and the controller outputs a position adjustment signal according to the level change, and the position The lifting drive moves the suction port up and down based on the adjustment signal, so that the suction port is always held at the liquid surface position. Therefore, unlike the conventional example in which a float floating on the liquid level detects a level change of the liquid level and follows the change, there is no fear that the suction port will separate from the liquid level under the influence of wind waves. The mouth can be reliably held at the liquid surface position.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面によって具体的
に説明する。図１は本発明による吸取装置の一例を示す
正面図、図２はその吸取口の構造を示す側面図、図３は
吸取口の液面位置での動きを示すグラフである。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a front view showing an example of the suction device according to the present invention, FIG. 2 is a side view showing the structure of the suction port, and FIG. 3 is a graph showing the movement of the suction port at the liquid surface position.
【０００８】本例の吸取装置は、液中から液面に向かっ
て延びる吸込管１の先端に、液面上の浮遊物を吸い取る
吸取口２が設けられている。吸込管１は、吸取口２を設
ける先端部が比較的短い垂直管３で形成され、その垂直
管３にフレキシブル管４が連結された構造になってお
り、また、垂直管３の下端には、揺動を抑える錘５が取
り付けられている。吸取口２は、液面に沿って周方向に
開口されると共に、その開口部６の上面が吸込管１の先
端に向かって円錐状に延びた案内斜面７になっている。
なお、開口部６は、約２００mm程度の開口高さを有して
いる。In the suction apparatus of this example, a suction port 2 for sucking suspended matter on the liquid surface is provided at the tip of a suction pipe 1 extending from the liquid toward the liquid surface. The suction pipe 1 has a structure in which the tip end portion provided with the suction port 2 is formed by a relatively short vertical pipe 3, and a flexible pipe 4 is connected to the vertical pipe 3, and at the lower end of the vertical pipe 3. A weight 5 for suppressing swinging is attached. The suction port 2 is opened in the circumferential direction along the liquid surface, and the upper surface of the opening 6 is a guide slope 7 that extends conically toward the tip of the suction pipe 1.
The opening 6 has an opening height of about 200 mm.
【０００９】図中、８は、吸取口２を液面位置に保持す
るように上下動させる昇降駆動装置であって、上下方向
に伸縮するピストンロッド１０のロッドヘッド１１に吸
取口２を固定した複動型エアシリンダ９と、当該エアシ
リンダ９をチェーン１２で懸吊したホイスト１３とで構
成されている。次に、１４は、液面のレベルを検出する
音波・超音波式レベル計であって、本例ではピストンロ
ッド１０のロッドヘッド１１から液面と平行に延びた水
平部材１５の先端に設けられて吸取口２と一体的に上下
動するように成されている。 In the figure, reference numeral 8 is an elevating / lowering device for vertically moving the suction port 2 so as to hold it at the liquid surface position, and the suction port 2 is fixed to a rod head 11 of a piston rod 10 which expands and contracts in the vertical direction. It is composed of a double-acting air cylinder 9 and a hoist 13 in which the air cylinder 9 is suspended by a chain 12. Next, 14 detects the level of the liquid surface.
A wave-ultrasonic level meter, as is integrally moved up and down and blotting mouth 2 is provided from the rod head 11 of the piston rod 10 to the distal end of the horizontal member 15 which extends parallel to the liquid surface in this example Is made.
【００１０】更に、制御装置１６は、エアシリンダ９の
駆動回路１７に対して位置調節信号ＣＳを出力していな
い時に、その信号ＣＳに代わって、図３の如くレベル計
１４のレベル検出値を基準として吸取口２を約２０mm程
度の振幅で上下させる制御信号ＣＸを数秒サイクルで出
力するようになっている。そして、この制御信号ＣＸに
基づき、昇降駆動装置８のエアシリンダ９が、液面位置
に保持された吸取口２をその開口部６が液面に開口する
高さの範囲内で小刻みに上下動させて、液面上浮遊物の
吸込を促すようになっている。Further, when the position adjusting signal CS is not output to the drive circuit 17 of the air cylinder 9, the controller 16 replaces the signal CS with the level detection value of the level meter 14 as shown in FIG. As a reference, a control signal CX for raising and lowering the suction port 2 with an amplitude of about 20 mm is output in a cycle of several seconds. Then, based on this control signal CX, the air cylinder 9 of the lifting drive device 8 moves up and down in small increments within the height range in which the opening 6 of the suction port 2 held at the liquid surface position opens on the liquid surface. By doing so, the suction of floating matter on the liquid surface is promoted.
【００１１】なお、エアシリンダ９には、その駆動回路
１７からピストンロッド１０を伸縮させる駆動用エアａ
及びｂと、ピストンロッド１０を一定の伸縮状態でロッ
クするロック・オン用エアｃとそのロックを解除するロ
ック・オフ用エアｄが供給される。また、ホイスト１３
には、その駆動回路１８からチェーン１２の巻上方向又
は巻出方向に電動機１９を回転させる電力が供給され
る。The air cylinder 9 is provided with a drive air a for expanding and contracting the piston rod 10 from its drive circuit 17.
And b, the lock-on air c for locking the piston rod 10 in a constant expansion / contraction state and the lock-off air d for unlocking the lock are supplied. Also, hoist 13
Is supplied with electric power from the drive circuit 18 for rotating the electric motor 19 in the winding direction or the unwinding direction of the chain 12.
【００１２】しかして、廃液の流入又は流出によって液
面のレベルが変化すると、そのレベル変化がレベル計１
４で検出されて、制御装置１６からエアシリンダ９の駆
動回路１７に対してレベル変化に応じた位置調節信号Ｃ
Ｓが出力され、その信号ＣＳに基づいて駆動回路１７か
ら出力される駆動用エアａ又はｂによりエアシリンダ９
のピストンロッド１０が液面のレベル変化に応じた所定
のストロークで伸長又は収縮せられると共に、ロック・
オン用エアｃによりその伸長状態又は収縮状態に保持さ
れて、当該ピストンロッド１０のロッドヘッド１１に取
り付けられた吸取口２が液面位置に保持される。また、
レベル計１４で検出した液面のレベル変化が、ピストン
ロッド１０の伸縮のみでは対応できないほど大きくなる
と、制御装置１６からホイスト１３の駆動回路１８に対
して位置調節信号ＣＨが出力されて、そのホイスト１３
の電動機１９がエアシリンダ９を懸吊したチェーン１２
を巻き上げ又は巻き出して吸取口２が液面位置に保持さ
れる。When the level of the liquid surface changes due to the inflow or outflow of the waste liquid, the level change 1
4 and the position adjustment signal C from the control device 16 to the drive circuit 17 of the air cylinder 9 according to the level change.
S is output and the air cylinder 9 is driven by the drive air a or b output from the drive circuit 17 based on the signal CS.
Piston rod 10 is extended or contracted with a predetermined stroke according to the level change of the liquid level, and the lock
The on-state air c holds the expanded or contracted state, and the suction port 2 attached to the rod head 11 of the piston rod 10 is held at the liquid surface position. Also,
When the level change of the liquid level detected by the level meter 14 becomes so large that expansion and contraction of the piston rod 10 alone cannot deal with it, the control device 16 outputs a position adjustment signal CH to the drive circuit 18 of the hoist 13, and the hoist. Thirteen
Chain 12 in which electric motor 19 suspends air cylinder 9
Is wound up or unwound to hold the suction port 2 at the liquid surface position.
【００１３】このように、昇降駆動装置８で液面位置に
保持された吸取口２は、風波の影響を受けて液面から離
脱することがなく、その吸取口２と一体的に上下動する
レベル計１４で正確に検出された液面のレベル変化に確
実に追従させることができるから、従来のように空気や
液体だけを吸い込むおそれはなくなる。殊に、音波・超
音波を利用したレベル計１４は、音波源から衝撃的に発
射した音が測定レベル表面まで行って反射して戻って来
るまでに要する時間を測り、この所要時間がレベルに比
例することを利用して測定するものであるが、液体との
間における音の反射率はほぼ１００％であり、液面のレ
ベル検出精度が極めて高いから、吸取口２を液面位置に
確実に保持することができる。As described above, the suction port 2 held at the liquid surface position by the elevating / lowering device 8 does not separate from the liquid surface due to the influence of wind waves, and moves up and down integrally with the suction port 2. Since it is possible to reliably follow the level change of the liquid level accurately detected by the level meter 14, there is no possibility of inhaling only air or liquid as in the conventional case. In particular, the level meter 14 utilizing sound waves / ultrasonic waves measures the time required for the sound emitted from the sound source to be shocked and emitted to the surface of the measurement level and then to be reflected and returned. It is measured by using the proportionality, but the reflectance of sound with the liquid is almost 100%, and the level detection accuracy of the liquid level is extremely high, so the suction port 2 can be reliably placed at the liquid level position. Can be held at.
【００１４】しかも、吸取口２のほぼ全周にわたって周
方向に開口部６を形成すると共に、その開口部６の上面
を円錐形状の案内斜面７に形成すれば、吸取口２から吸
込管１に吸い込まれる液体が渦流を生じて、その渦流で
液面上の浮遊物が巻き込まれるように吸い取られるか
ら、浮遊物の吸取効率が著しく向上する。Moreover, if the opening 6 is formed in the circumferential direction over substantially the entire circumference of the suction port 2 and the upper surface of the opening 6 is formed as a conical guide slope 7, the suction port 2 is connected to the suction pipe 1. Since the sucked liquid produces a swirl flow and the suspended matter on the liquid surface is sucked up by the swirl flow, the suction efficiency of the suspended matter is significantly improved.
【００１５】そして、上記のようにして吸取口２が液面
位置に保持されると、制御装置１６からエアシリンダ９
の駆動回路１７に対して制御信号ＣＸが出力され、その
制御信号ＣＸに基づいて、駆動回路１７からピストンロ
ッド１０を約２０mm程度のストロークで伸縮させる駆動
用エアａ及びｂと、その伸長状態及び伸縮状態でピスト
ンロッド１０を夫々ロックするロック・オン用エアｃ
と、そのロックを解除するロック・オフ用エアｄが数秒
サイクルで出力されて、開口部６を液面に開口した吸取
口２が、その開口高さの範囲内で小刻みに上下動を繰り
返し、液面上浮遊物の吸込を促すようになっている。ま
た、液面レベルが一定に維持されるように廃液が流入さ
れるような場合であっても、吸取口２は制御信号ＣＸに
より小刻みに上下動されるので、その液面に浮遊する粘
度の高い油類や塗料カスのような浮遊物が吸取口２の淵
に滞留することがなく吸込が促される。これにより、液
面上浮遊物の吸取効率が更に高まり、また、液面が波立
っている時でも吸取口２から空気だけが吸い込まれるこ
とはなく、空気が液面中に泡のように混ざった状態で吸
い込まれるから、吸取管１の管内に空気が充満して当該
吸取管１が液面に浮き上がるおそれは全くなくなる。When the suction port 2 is held at the liquid surface position as described above, the controller 16 causes the air cylinder 9 to move.
The control signal CX is output to the drive circuit 17 of FIG. 2, and based on the control signal CX, the drive air a and b for expanding and contracting the piston rod 10 from the drive circuit 17 in a stroke of about 20 mm, and its extended state and Lock-on air c that locks the piston rods 10 in the stretched state
Then, the lock-off air d for releasing the lock is output in a cycle of several seconds, and the suction port 2 that opens the opening 6 to the liquid surface repeatedly moves up and down within a range of the opening height. It is designed to promote the suction of floating matter on the liquid surface. Ma
In addition, the waste liquid flows in so that the liquid surface level is kept constant.
Even in such a case, the suction port 2 is set to the control signal CX.
Since it is moved up and down in smaller steps, the viscosity floating on the liquid surface
Floating materials such as high-grade oils and paint debris are at the edge of the suction port 2.
Suction is promoted without staying in the. As a result, the efficiency of absorbing the suspended matter on the liquid surface is further enhanced, and even when the liquid surface is undulating, only the air is not sucked from the suction port 2 and the air is mixed like bubbles in the liquid surface. Since the suction pipe 1 is sucked in, the possibility that the suction pipe 1 is filled with air and the suction pipe 1 floats on the liquid surface is completely eliminated.
【００１６】[0016]
【発明の効果】以上述べたように、本発明によれば、液
中から液面に向かって延びる吸込管の先端に設けられた
吸取口が、液面位置に確実に保持され、風波の影響を受
けて液面から離脱するおそれは全くないから、液面上浮
遊物の吸取効率が著しく高まると同時に、吸込管に空気
だけが吸い込まれてその吸込管が液面に浮き上がるおそ
れもなくなるという大変優れた効果がある。As described above, according to the present invention, the suction port provided at the tip of the suction pipe extending from the liquid toward the liquid surface is securely held at the liquid surface position, and the influence of wind waves is exerted. Since there is no danger of being separated from the liquid surface by receiving it, the efficiency of absorbing suspended matter on the liquid surface is significantly improved, and at the same time, there is no possibility that only the air is sucked into the suction pipe and the suction pipe floats on the liquid surface. It has an excellent effect.
【図１】本発明による吸取装置の一例を示す正面図。FIG. 1 is a front view showing an example of a suction device according to the present invention.
【図２】吸取口の構造を示す側面図。FIG. 2 is a side view showing the structure of a suction port.
【図３】吸取口の液面位置での動きを示すグラフ。FIG. 3 is a graph showing the movement of the suction port at the liquid surface position.
１・・・吸込管 ２・・・吸取口 ６・・・吸取口の開口部 ７・・・案内斜面 ８・・・昇降駆動装置 ９・・・エアシリン
ダ １３・・・ホイスト １４・・・レベル計 １６・・・制御装置1 ... Suction pipe 2 ... Suction port 6 ... Suction port opening 7 ... Guide slope 8 ... Elevating drive device 9 ... Air cylinder 13 ... Hoist 14 ... Level 16 in total ... control device
Claims (4)
（１）の先端に、液面上の浮遊物を吸い取る吸取口
（２）が設けられた液面上浮遊物の吸取装置において、
前記吸取口（２）と一体的に上下動可能に設けられたレ
ベル計（14）と、当該レベル計（14）で検出した液面の
レベル変化に応じて前記吸取口（２）を上下させる位置
調節信号（CS, CH) を出力する制御装置（16）と、その
位置調節信号（CS, CH) に基づいて前記吸取口（２）を
液面位置に保持するように上下動させる昇降駆動装置
（８）とを具備したことを特徴とする液面上浮遊物の吸
取装置。1. A device for sucking suspended matter on a liquid surface, wherein a suction port (2) for sucking suspended matter on the liquid surface is provided at the tip of a suction pipe (1) extending from the liquid surface toward the liquid surface,
A level meter (14) provided so as to be vertically movable integrally with the suction port (2), and the suction port (2) is moved up and down according to the level change of the liquid level detected by the level meter (14). A control device (16) that outputs a position adjustment signal (CS, CH), and an up-and-down drive that moves up and down so as to hold the suction port (2) at the liquid surface position based on the position adjustment signal (CS, CH). A device for sucking suspended matter on a liquid surface, comprising: the device (8).
（２）を液面位置に保持するように上下動させると共
に、液面位置に保持した吸取口（２）をその開口高さの
範囲内で小刻みに上下動させるエアシリンダ（９）でな
る請求項１記載の液面上浮遊物の吸取装置。2. The elevating / lowering drive device (8) moves up and down so as to hold the suction port (2) at the liquid level position, and the opening height of the suction port (2) held at the liquid level position. 2. The device for sucking suspended matter above the liquid surface according to claim 1, comprising an air cylinder (9) which is vertically moved in small increments within the range.
（１）の先端に、液面上の浮遊物を吸い取る吸取口
（２）が設けられた液面上浮遊物の吸取装置において、
前記吸取口（２）を液面位置で小刻みに上下動させる昇
降駆動装置（８）を備えたことを特徴とする液面上浮遊
物の吸取装置。 3. A suction pipe extending from the liquid toward the liquid surface.
At the tip of (1), a suction port for sucking suspended matter on the liquid surface
In the device for sucking suspended matter on the liquid surface provided with (2),
The suction port (2) is moved up and down in small steps at the liquid level.
Floating above the liquid surface, characterized by having a descending drive (8)
Blotting device.
（１）の先端に、液面上の浮遊物を吸い取る吸取口
（２）が設けられた液面上浮遊物の吸取装置において、
液面のレベル変化を検出するレベル計（14）と、当該レ
ベル計（14）で検出した液面のレベル変化に応じて前記
吸込口（２）を液面上に位置させる位置調節信号（CS,
CH) を出力する制御装置（16）と、その位置調節信号
（CS, CH) に基づいて前記吸取口（２）を液面位置に保
持するように上下動させると共に、液面位置に保持した
当該吸取口（２）を強制的に液面位置で小刻みに上下動
させる昇降駆動装置（８）とを具備したことを特徴とす
る液面上浮遊物の吸取装置。 4. A suction pipe extending from the liquid toward the liquid surface.
At the tip of (1), a suction port for sucking suspended matter on the liquid surface
In the device for sucking suspended matter on the liquid surface provided with (2),
A level meter (14) that detects changes in the liquid level and
Depending on the level change of the liquid level detected by the bell meter (14),
Position adjustment signal (CS, which positions the suction port (2) above the liquid level
CH) output control device (16) and its position adjustment signal
Maintain the suction port (2) at the liquid level based on (CS, CH).
Moved up and down to hold and held at liquid level
Forcibly move the suction port (2) up and down in small increments at the liquid level.
And a lifting drive device (8) for
A device for absorbing floating matter on the liquid surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3217419A JP2553785B2 (en) | 1991-08-28 | 1991-08-28 | Device for absorbing floating matter on the liquid surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3217419A JP2553785B2 (en) | 1991-08-28 | 1991-08-28 | Device for absorbing floating matter on the liquid surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0557278A JPH0557278A (en) | 1993-03-09 |
| JP2553785B2 true JP2553785B2 (en) | 1996-11-13 |
Family
ID=16703919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3217419A Expired - Fee Related JP2553785B2 (en) | 1991-08-28 | 1991-08-28 | Device for absorbing floating matter on the liquid surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2553785B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2896289B2 (en) * | 1993-05-26 | 1999-05-31 | 株式会社栗田機械製作所 | Sickna |
-
1991
- 1991-08-28 JP JP3217419A patent/JP2553785B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0557278A (en) | 1993-03-09 |
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