JPH11244757A - Liquid discharging device - Google Patents
Liquid discharging deviceInfo
- Publication number
- JPH11244757A JPH11244757A JP10055062A JP5506298A JPH11244757A JP H11244757 A JPH11244757 A JP H11244757A JP 10055062 A JP10055062 A JP 10055062A JP 5506298 A JP5506298 A JP 5506298A JP H11244757 A JPH11244757 A JP H11244757A
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- liquid
- valve
- throttle valve
- variable throttle
- 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
- 239000007788 liquid Substances 0.000 title claims abstract description 52
- 238000007599 discharging Methods 0.000 title claims description 4
- 239000000725 suspension Substances 0.000 claims description 3
- 230000010349 pulsation Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
Landscapes
- Coating Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、フィラー入り
の、もしくはフイラーの入らない接着剤、ペースト状材
料などの粘性物質を含む液体を、所定の吐出位置に、予
め定めた吐出量に従って吐出する液体吐出装置に関し、
とくには、液体吐出の休止中に、貯留容器内の液体の残
量、液体に固有の物性等のいかんにかかわらず、その貯
留容器に、所期した通りの負圧を常に正確に作用させる
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid for discharging a liquid containing a viscous substance such as an adhesive or a paste-like material containing a filler or not containing a filler into a predetermined discharge position in accordance with a predetermined discharge amount. Regarding the discharge device,
In particular, the one that always applies the expected negative pressure to the storage container during the suspension of liquid discharge, regardless of the remaining amount of liquid in the storage container, the physical properties of the liquid, etc. It is.
【０００２】[0002]
【従来の技術】貯留容器からの液体吐出の停止時を含む
それの休止中に、その貯留容器に負圧を作用させて、液
体の切れを良くするとともに、不測の液だれを防止する
従来技術としては、たとえば、出願人が先に特開平３−
217271号として提案したものがある。これは、高い負圧
を発生するエア吸引源を、電空レギュレータよりなり制
御部からの信号によって開度をコントロールされる負圧
用減圧弁、アキュムレータ、吸引用電磁弁および吐出用
電磁弁を順次に介して液体貯留容器としてのシリンジに
接続したものであり、そこでは、実験その他によって求
めた、シリンジ内液体残量と液体重量の相殺に必要な負
圧度との相対関係に基づいて、制御部から負圧用減圧弁
に入力される圧力設定信号に応じて、シリンジへ供給さ
れる負圧度を調節することで、シリンジ内の負圧度が高
すぎることに起因する、シリンジ内液体の負圧系路内へ
の吸い込みを防止し、この一方で、負圧度が低すぎるこ
とに起因する、シリンジ内液体の不測のたれ落ちを防止
することとしている。2. Description of the Related Art Conventionally, a negative pressure is applied to a storage container during suspension of the liquid including stoppage of liquid discharge from the storage container to improve the cutoff of the liquid and to prevent unexpected dripping. For example, as the applicant,
There is one proposed as 217271. It consists of an air suction source that generates a high negative pressure, an electropneumatic regulator, and a negative pressure reducing valve, an accumulator, a suction solenoid valve, and a discharge solenoid valve whose opening is controlled by a signal from the control unit. Connected to a syringe as a liquid storage container through a control unit based on the relative relationship between the remaining amount of liquid in the syringe and the degree of negative pressure required to offset the liquid weight, which is obtained through experiments and the like. By adjusting the degree of negative pressure supplied to the syringe in accordance with the pressure setting signal input to the negative pressure reducing valve from, the negative pressure of the liquid in the syringe due to the negative pressure inside the syringe being too high It is intended to prevent suction into the system, while preventing accidental dripping of the liquid in the syringe due to too low a negative pressure.
【０００３】[0003]
【発明が解決しようとする課題】しかるに、この従来技
術では、負圧用減圧弁として、電空レギュレータを用い
ることとしており、多くの電空レギュレータは、ハウジ
ング内に電磁式の方向切換弁およびばね力を有するダイ
アフラムを組み込むことによって構成されていることか
ら、とくに大気圧に近い負圧域 (０〜−10mmHg付近) で
は、ダイアフラムのばね力との釣り合い状態の確保が難
しく、負圧の安定度が低くなり、それ故に、液体の吐出
量、塗布形状等の安定性もまた低くなるという問題があ
った他、停電等によって電磁式方向切換弁の作動が停止
したときには、シリンジへの負圧の供給が停止され、ま
たは、エア吸引源の高い負圧が減圧されることなく直接
的にシリンジへ供給されて、シリンジ内の液体の液だれ
もしくは吸い込みが発生するという問題があった。However, in this prior art, an electropneumatic regulator is used as a negative pressure reducing valve. Many electropneumatic regulators have an electromagnetic directional switching valve and a spring force in a housing. In particular, in a negative pressure range close to the atmospheric pressure (around 0 to -10 mmHg), it is difficult to ensure a state of equilibrium with the spring force of the diaphragm, and the stability of the negative pressure is reduced. In addition, there is a problem that the stability of the discharge amount of the liquid, the coating shape, etc. is also lowered, and when the operation of the electromagnetic directional control valve is stopped due to a power failure or the like, the supply of the negative pressure to the syringe is performed. Is stopped, or the high negative pressure of the air suction source is directly supplied to the syringe without decompression, causing dripping or suction of the liquid in the syringe. There was a problem of living.
【０００４】しかも、電空レギュレータは、シリンジ内
圧とダイアフラムのばね力との釣り合い状態が崩れたと
きに、エア吸引源からの負圧をシリンジ内へ供給する一
方で、シリンジ内の負圧が所定値となって、それら両者
が釣り合ったときに負圧の供給を停止するオン・オフ制
御を行うものであるが故に、シリンジ内圧に脈動を生
じ、これが、吐出量のばらつきを引き起こすことになる
のである。In addition, when the balance between the internal pressure of the syringe and the spring force of the diaphragm is broken, the electropneumatic regulator supplies the negative pressure from the air suction source into the syringe, while maintaining the negative pressure in the syringe at a predetermined pressure. Value, the on / off control for stopping the supply of the negative pressure when both of them are balanced causes pulsation in the internal pressure of the syringe, which causes variation in the discharge amount. is there.
【０００５】その上、この従来技術では、高い負圧を発
生するエア吸引源の下流側に、負圧用減圧弁としての電
空レギュレータを配設していることから、わずかなダイ
ヤフラムの開きでも多量の空気が流れ込むようになるた
め、これが吐出量のばらつきを招くという問題点があっ
た。In addition, in this prior art, an electropneumatic regulator as a negative pressure reducing valve is disposed downstream of an air suction source that generates a high negative pressure. This causes a problem in that the air flows in, causing variations in the discharge amount.
【０００６】この発明は、従来技術が抱えるこのような
問題点をことごとく解決することを課題として検討した
結果なされたものであり、それの目的とするところは、
負圧度の大小を問わず、液体の貯留容器に常に安定した
負圧を作用させることができ、また、停電等による電力
の供給停止に対しても、貯留容器に、その直前の負圧を
継続的に作用させることができ、これらによって、貯留
容器内の液体のたれ落ちおよび吸い込みを一層有効に阻
止することができ、さらには、貯留容器および負圧系流
路内への脈動の発生を防止することで、吐出量の安定制
御を実現するものである。加えて、負圧発生手段を可変
絞り弁の下流側に配設することおよび、高い負圧を常時
発生するエア吸引源の設置を不要ならしめることのそれ
ぞれにより、いかなる場合であっても安定した吐出量を
もたらすことができる液体吐出装置を提供することにあ
る。[0006] The present invention has been made as a result of studying to solve all such problems of the prior art, and the purpose of the invention is to provide:
Regardless of the degree of negative pressure, a stable negative pressure can always be applied to the liquid storage container, and even if the power supply is stopped due to a power failure or the like, the negative pressure immediately before that is applied to the storage container. They can be operated continuously, whereby the dripping and suction of the liquid in the storage container can be more effectively prevented, and furthermore, the generation of pulsation into the storage container and the negative pressure system flow path can be prevented. By preventing the discharge, stable control of the discharge amount is realized. In addition, by providing the negative pressure generating means downstream of the variable throttle valve and eliminating the need for the installation of an air suction source that constantly generates a high negative pressure, stable operation is ensured in any case. It is an object of the present invention to provide a liquid discharge device capable of providing a discharge amount.
【０００７】[0007]
【課題を解決するための手段】この発明の液体吐出装置
は、貯留容器内の液体を、予め定めた所定量ずつ吐出す
るとともに、液体吐出の停止時を含むそれの休止中に貯
留容器に負圧を作用させるものであり、貯留容器に負圧
を作用させる負圧系を、弁体を機械的に、たとえば、ね
じ、歯車、シリンダ等によってストロークさせる可変絞
り弁と、可変絞り弁を通る加圧気体の流量に応じた負圧
を発生する負圧発生手段と、可変絞り弁の開度を、貯留
容器内の残液量その他に関連する予めの入力に基づいて
コントロールする制御手段とで構成したものである。な
おここで、負圧発生手段の下流側に、レギュレータ、電
磁弁等の弁手段を配設し得ることはもちろんである。SUMMARY OF THE INVENTION A liquid discharging apparatus according to the present invention discharges a predetermined amount of liquid in a storage container by a predetermined amount, and discharges the liquid to the storage container while the liquid discharge is stopped including when the liquid discharge is stopped. A variable throttle valve that mechanically strokes the valve element by, for example, a screw, a gear, a cylinder, or the like, and a variable pressure valve that passes through the variable throttle valve. Negative pressure generating means for generating a negative pressure according to the flow rate of the pressurized gas, and control means for controlling the opening degree of the variable throttle valve based on a previous input relating to the remaining liquid amount in the storage container and the like. It was done. Here, it goes without saying that valve means such as a regulator and a solenoid valve can be provided downstream of the negative pressure generating means.
【０００８】この液体吐出装置では、制御手段からの信
号に基づいて、可変絞り弁の弁体のストローク位置、ひ
いては可変絞り弁の開度をコントロールして、そこを通
過する加圧流体の流量を調節することにより、負圧発生
手段にて発生される負圧度を、それの大小を問わず、ま
た、ばね力等との釣り合い状態を確保する必要なしに、
優れた安定性の下で、常に正確に所期した通りの値とす
ることができる。従って、流体の吐出量、塗布形状等を
もまた十分に安定させることができる。In this liquid discharge apparatus, the stroke position of the valve body of the variable throttle valve and, consequently, the opening degree of the variable throttle valve are controlled based on a signal from the control means, and the flow rate of the pressurized fluid passing therethrough is controlled. By adjusting, the degree of negative pressure generated by the negative pressure generating means, regardless of its magnitude, and without having to secure a state of equilibrium with spring force, etc.
With good stability, the value can always be exactly as expected. Therefore, the discharge amount of the fluid, the application shape, and the like can also be sufficiently stabilized.
【０００９】ところで、ここにおける可変絞り弁の、機
械的にストロークされる弁体は、制御手段からの信号に
よって作動されるモータその他をもって進退変位される
ので、たとえば停電等によって、モータ, 制御手段等の
作動が停止しても、弁体それ自身は、停電の直前のスト
ローク位置にホールドされ、可変絞り弁を通る加圧気体
の流量もまた停電の直前状態に維持されることになり、
これにより、負圧発生手段にて発生されて、貯留容器に
供給される負圧の変動が有効に防止されることになる。
かくしてここでは、停電等に起因して、貯留容器内に負
圧が供給されなくなることも、エア吸引源等で発生され
た過大な負圧がそこへ直接的に供給されることもなく、
貯留容器内の液体のたれ落ちおよび負圧系流路内への吸
い込みのそれぞれを効果的に阻止することができる。Incidentally, the mechanically stroked valve element of the variable throttle valve here is advanced and retracted by a motor or the like which is operated by a signal from the control means. Even if the operation stops, the valve body itself is held at the stroke position immediately before the power failure, and the flow rate of the pressurized gas passing through the variable throttle valve is also maintained in the state immediately before the power failure,
As a result, the fluctuation of the negative pressure generated by the negative pressure generating means and supplied to the storage container is effectively prevented.
Thus, here, the negative pressure is not supplied into the storage container due to the power failure or the like, and the excessive negative pressure generated by the air suction source or the like is not directly supplied thereto.
The dripping of the liquid in the storage container and the suction into the negative pressure system flow path can be effectively prevented.
【００１０】ところで、この吐出装置においても、停電
等の発生時には、加圧流体の発生源としてのたとえばコ
ンプレッサ等の作動が停止することになるも、かかる場
合には、蓄圧器に貯えた加圧気体の流出を継続させ、そ
の蓄圧器内の加圧気体が流出し終えるより先に、液体の
貯留容器を負圧系流路から切り離したりあるいは、その
貯留容器を密閉したりすることで十分な対策を講じるこ
とができる。By the way, in this discharge device as well, when a power failure or the like occurs, the operation of, for example, a compressor or the like as a source of pressurized fluid is stopped. In such a case, the pressurized fluid stored in the accumulator is stopped. It is sufficient to keep the outflow of gas and to disconnect the liquid storage container from the negative pressure system flow path or to close the storage container before the pressurized gas in the accumulator has finished flowing. Measures can be taken.
【００１１】さらにこの装置は、可変絞り弁を通る加圧
気体の流量に応じた負圧度を貯留容器に連続的に作用さ
せるものであるので、貯留容器および負圧系流路内での
オン・オフ制御を排除して、脈動の発生に起因する、吐
出量のばらつきを確実かつ未然に除去することができ
る。Further, in this device, the degree of negative pressure according to the flow rate of the pressurized gas passing through the variable throttle valve is continuously applied to the storage container. Eliminating the off control, it is possible to reliably and proactively remove the variation in the discharge amount due to the generation of the pulsation.
【００１２】しかもここでは、可変絞り弁の下流側に配
設した負圧発生手段をもって、所期した通りの負圧を発
生させることにより、不要に高い負圧を常時発生させる
エア吸引源を配設する場合に比して、装置の設備構成な
らびに回路構成が簡素化, 小型化することに加え、トラ
ブルの発生を最小に制御できるという効果を奏すること
になる。Further, here, an air suction source for constantly generating an unnecessarily high negative pressure is provided by generating a desired negative pressure by means of a negative pressure generating means disposed downstream of the variable throttle valve. As compared with the case where the apparatus is provided, not only the facility configuration and the circuit configuration of the apparatus are simplified and downsized, but also the effect that the occurrence of trouble can be controlled to a minimum can be achieved.
【００１３】[0013]
【発明の実施の形態】以下にこの発明の実施の形態を図
面に示すところに基づいて説明する。図１は、この発明
の実施形態を示す回路図であり、図中実線は圧力回路
を、そして破線は信号回路をそれぞれ示す。ここでは、
液体の貯留容器としてのシリンジ１と、加圧気体供給手
段としてのエア供給源２とを切換弁３を介して接続する
とともに、この切換弁３とエア供給源２との間に吐出圧
設定用のレギュレータ４を介装し、併せて、その切換弁
３に、負圧発生手段としてのエジェクタ５を接続する。
またここでは、このエジェクタ５とエア供給源２とを、
たとえば、ねじもしくは歯車をもって、弁体を機械的に
ストロークさせる可変絞り弁６を介して接続するととも
に、エジェクタ５と切換弁３との間に負圧計７を介装す
る。そしてさらには、切換弁３に切換え信号を、レギュ
レータ４に設定圧力信号を、そして可変絞り弁６の弁体
ストローク用のモータ８に設定負圧信号をそれぞれ出力
するとともに、負圧計７から圧力信号を入力される制御
手段９を設ける。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing an embodiment of the present invention, in which a solid line indicates a pressure circuit, and a broken line indicates a signal circuit. here,
A syringe 1 as a liquid storage container and an air supply source 2 as a pressurized gas supply means are connected via a switching valve 3, and a discharge pressure setting between the switching valve 3 and the air supply source 2. In addition, an ejector 5 as a negative pressure generating means is connected to the switching valve 3.
Here, the ejector 5 and the air supply source 2 are
For example, the valve body is connected via a variable throttle valve 6 that mechanically strokes the valve body with a screw or a gear, and a negative pressure gauge 7 is interposed between the ejector 5 and the switching valve 3. Further, a switching signal is output to the switching valve 3, a set pressure signal is output to the regulator 4, and a set negative pressure signal is output to the motor 8 for the valve body stroke of the variable throttle valve 6. Is provided.
【００１４】ここで、この制御手段９には、たとえば、
シリンジ内の液体の定量吐出のための、切換弁３の切換
え時期およびホールド時間、シリンジ内の液体量に応じ
た加圧力等を、液体の物性その他に関する経験則に則っ
て予め入力することができる他、エア供給源２から供給
される加圧空気の圧力等との関連の下で、シリンジ内の
液体量に応じた負圧力の発生を担保し得る、可変絞り弁
６の弁開度を予め入力することができ、さらには、負圧
計７からの実測負圧値のフィードバック信号に基づく弁
開度の修正条件等を入力することができる。Here, the control means 9 includes, for example,
The switching timing and the holding time of the switching valve 3 for the constant discharge of the liquid in the syringe, the pressing force corresponding to the amount of the liquid in the syringe, and the like can be input in advance based on empirical rules regarding the physical properties of the liquid and the like. In addition, the valve opening of the variable throttle valve 6 that can ensure generation of a negative pressure corresponding to the amount of liquid in the syringe under the relation with the pressure of the pressurized air supplied from the air supply source 2 is set in advance. In addition, a condition for correcting the valve opening based on the feedback signal of the actually measured negative pressure value from the negative pressure gauge 7 can be input.
【００１５】このように構成してなる装置による、シリ
ンジ内の液体の定量吐出は、シリンジ１を、ワークに対
する所要位置に位置決めした状態で、たとえば、制御手
段９からの信号に基づくレギュレータ４の作用下で、エ
ア供給源２からの加圧空気を所定の圧力に減圧しつつ、
これもまた制御手段９からの信号によって、切換弁３を
図示位置からシフトさせて、レギュレータ４を経た空気
圧を、シリンジ内に所要の時間作用させることにより行
われ、この結果として、シリンジ内の液体は、その自重
および加圧力の作用下で、先端に設けたノズル１ａか
ら、予め定めた量だけ吐出されることになる。[0015] The constant discharge of the liquid in the syringe by the apparatus configured as described above is performed by, for example, the operation of the regulator 4 based on a signal from the control means 9 while the syringe 1 is positioned at a required position with respect to the work. Below, while reducing the pressurized air from the air supply source 2 to a predetermined pressure,
This is also performed by shifting the switching valve 3 from the position shown in the figure by a signal from the control means 9 and applying the air pressure passed through the regulator 4 to the syringe for a required time, and as a result, the liquid in the syringe is Is discharged by a predetermined amount from the nozzle 1a provided at the tip under the action of its own weight and pressure.
【００１６】これに対し、液体の吐出の停止は、切換弁
３を、制御手段９からの信号に基づいて図示の位置にシ
フトさせることによって行われ、切換弁３のこのシフト
と同時に、エジェクタ５によって発生された負圧がシリ
ンジ内へ供給されることになる。On the other hand, the discharge of the liquid is stopped by shifting the switching valve 3 to the position shown in the drawing based on a signal from the control means 9. At the same time as the shifting of the switching valve 3, the ejector 5 is stopped. The negative pressure generated by the above will be supplied into the syringe.
【００１７】ここで、エジェクタ５によって発生される
負圧度は、シリンジ内の液体残量に応じて制御手段９か
ら、可変絞り弁６のモータ８に出力される弁開度信号に
より特定され、液体残量が多い場合には、弁の開度を大
きくして、可変絞り弁に多量の加圧空気を流通させるこ
とで大きな負圧が、そして、液体残量が少ない場合に
は、弁開度を小さくすることで小さな負圧がそれぞれ発
生されることになる。そして、このようにして発生され
た負圧力の実測値は、負圧計７から制御手段９にフィー
ドバックされ、その実測値と所期した負圧力との間に差
異があるときには、制御手段９は、モータ８に、弁開度
修正信号を再度出力して、それらの両者を高い精度で一
致させる。従って、切換弁３が、前述したように図示位
置にシフトされた場合には、シリンジ内の加圧力が速や
かに排出されることはもちろん、その内部が液体残量に
見合った負圧とされるので、すぐれた液切れが実現され
るとともに、液体の不測のたれ落ちが有効に防止される
ことになる。またここでは、シリンジ内の液体残量がわ
ずかになることによって、シリンジ内へ供給する所要の
負圧力もまた小さくなったときには、可変絞り弁６を通
る加圧空気の流量を絞ることで、大気圧に近い負圧力を
も安定して供給することができるので、液体残量の多少
にかかわらず、液体の吐出量および塗布形状等を常に所
期した通りのものとすることができる。Here, the degree of negative pressure generated by the ejector 5 is specified by a valve opening signal output from the control means 9 to the motor 8 of the variable throttle valve 6 in accordance with the remaining amount of liquid in the syringe. When the amount of remaining liquid is large, the valve opening is increased to allow a large amount of pressurized air to flow through the variable throttle valve to generate a large negative pressure. By reducing the degree, a small negative pressure is generated. Then, the measured value of the negative pressure generated in this way is fed back from the negative pressure gauge 7 to the control means 9, and when there is a difference between the measured value and the expected negative pressure, the control means 9 A valve opening correction signal is output to the motor 8 again to make them match with high accuracy. Therefore, when the switching valve 3 is shifted to the illustrated position as described above, not only the pressing force in the syringe is quickly discharged, but also the inside thereof has a negative pressure corresponding to the remaining amount of liquid. As a result, excellent liquid drainage is realized, and accidental dripping of the liquid is effectively prevented. Here, when the required negative pressure to be supplied into the syringe is also reduced due to the small amount of liquid remaining in the syringe, the flow rate of the pressurized air passing through the variable throttle valve 6 is reduced by reducing the flow rate. Since a negative pressure close to the atmospheric pressure can be stably supplied, the discharge amount of the liquid, the application shape, and the like can always be as expected regardless of the remaining amount of the liquid.
【００１８】ところで、この装置では、停電等によって
制御手段９, モータ８等の作動が停止しても、可変絞り
弁６の開度はそのままに維持されることから、エア供給
源２からの加圧空気の供給が継続する限りにおいては、
シリンジ１に負圧を作用させることができるので、液体
のたれ落ち等を生じるに先立って、善後策を講じるに十
分な時間を確保することができる。しかも、ここにおけ
る負圧力は、それの大小にかかわらず、可変絞り弁６へ
の加圧空気の継続的な流動の下に発生され、シリンジ１
および負圧系流路のいずれにも脈動が生じることがない
ので、吐出量のばらつきを効果的に抑制することができ
る。その上、ここでは、所要の負圧力を発生するエジェ
クタ５を設けることで、常時高い負圧力を準備するエア
供給源の設置が不要となるので、装置の構造, とくに回
路構成が簡素化する上に小型化を図ることができ、メイ
ンテナンスフリー,コスト低減に対しても寄与する。By the way, in this apparatus, even if the operation of the control means 9, the motor 8 and the like is stopped due to a power failure or the like, the opening degree of the variable throttle valve 6 is maintained as it is. As long as the supply of compressed air continues,
Since a negative pressure can be applied to the syringe 1, it is possible to secure sufficient time for taking a good or bad measure before the liquid dripping or the like occurs. Moreover, the negative pressure here is generated under the continuous flow of the pressurized air to the variable throttle valve 6 regardless of the magnitude thereof, and the syringe 1
Since no pulsation occurs in any of the flow path and the negative pressure flow path, the variation in the discharge amount can be effectively suppressed. In addition, here, by providing the ejector 5 for generating a required negative pressure, it is not necessary to install an air supply source for always preparing a high negative pressure, so that the structure of the apparatus, particularly the circuit configuration, is simplified. In addition, it is possible to reduce the size and contribute to maintenance free and cost reduction.
【００１９】以上この発明の実施形態を図面に示すとこ
ろに基づいて説明したが、エジェクタ５より下流側、た
とえば、エジェクタ５と切換弁３との間に、レギュレー
タ電磁弁等の弁手段を配設することもでき、これによれ
ば、シリンジ内に負圧力をより迅速に供給したい場合そ
の他に、エジェクタ５での発生負圧を予め大きめに設定
しておき、切換弁３のシフトとタイミングを合わせて、
その大きめの負圧力をシリンジ１に作用させることが可
能となる。Although the embodiment of the present invention has been described with reference to the drawings, valve means such as a regulator solenoid valve is provided downstream of the ejector 5, for example, between the ejector 5 and the switching valve 3. According to this, when it is desired to supply the negative pressure into the syringe more quickly, the negative pressure generated in the ejector 5 is set to a relatively large value in advance, and the timing of the shift of the switching valve 3 is adjusted. hand,
The larger negative pressure can be applied to the syringe 1.
【００２０】なお、図に示すところからは明らかではな
いが、エジェクタ５とシリンジ１との間の管路長はでき
るだけ短くすることが、管路内の空気量を低減し、ま
た、管路抵抗を低減する上で好ましく、その結果とし
て、シリンジ内へ所期した負圧をより迅速に作用させる
ことが可能となる。Although it is not clear from the figure, the length of the pipe between the ejector 5 and the syringe 1 should be as short as possible to reduce the amount of air in the pipe and to reduce the pipe resistance. Therefore, it is possible to more quickly apply the desired negative pressure into the syringe.
【００２１】[0021]
【発明の効果】以上に述べたところから明らかなよう
に、この発明によれば、液体の貯留容器内へ所期した通
りの負圧を、それの大小を問わず、常に安定して供給す
ることができ、また、停電等があっても貯留容器に負圧
を継続的に作用させて、液体のたれ落ち、吸い込み等を
有効に防止することができる。また、この発明によれ
ば、貯留容器および負圧系流路内への脈動の発生を防止
して、吐出量の安定を図ることができる。さらに、この
発明については、高い負圧を常時発生するエア供給源の
設置を不要ならしめて、安定した吐出量の確保と、装置
の簡素化, 小型化, 低コスト化を得ることができる。As is apparent from the above description, according to the present invention, the desired negative pressure is always stably supplied into the liquid storage container regardless of its magnitude. In addition, even if there is a power failure or the like, a negative pressure is continuously applied to the storage container, so that dripping and suction of the liquid can be effectively prevented. Further, according to the present invention, it is possible to prevent the occurrence of pulsation in the storage container and the negative pressure system flow path, and to stabilize the discharge amount. Further, according to the present invention, it is not necessary to provide an air supply source that constantly generates a high negative pressure, and it is possible to secure a stable discharge amount and to achieve simplification, downsizing, and cost reduction of the apparatus.
【図１】この発明の実施形態を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention.
１ シリンジ １ａ ノズル ２ エア供給源 ３ 切換弁 ４ レギュレータ ５ エジェクタ ６ 可変絞り弁 ７ 負圧計 ８ モータ ９ 制御手段 DESCRIPTION OF SYMBOLS 1 Syringe 1a Nozzle 2 Air supply source 3 Switching valve 4 Regulator 5 Ejector 6 Variable throttle valve 7 Negative pressure gauge 8 Motor 9 Control means
Claims (1)
とともに、液体吐出の休止中に貯留容器に負圧を作用さ
せる液体吐出装置であって、 貯留容器に負圧を作用させる負圧系を、弁体を機械的に
ストロークさせる可変絞り弁と、可変絞り弁を通る加圧
気体の流量に応じた負圧を発生する負圧発生手段と、可
変絞り弁の開度を、予めの入力に基づいてコントロール
する制御手段とで構成してなる液体吐出装置。1. A negative pressure system for discharging a predetermined amount of liquid in a storage container and applying a negative pressure to the storage container during suspension of liquid discharge, wherein the negative pressure system applies a negative pressure to the storage container. A variable throttle valve that mechanically strokes the valve body, negative pressure generating means that generates a negative pressure corresponding to the flow rate of the pressurized gas passing through the variable throttle valve, and an opening degree of the variable throttle valve that is input in advance. And a control means for performing control based on the liquid ejection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5506298A JP3597695B2 (en) | 1998-03-06 | 1998-03-06 | Liquid ejection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5506298A JP3597695B2 (en) | 1998-03-06 | 1998-03-06 | Liquid ejection device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003424266A Division JP2004105968A (en) | 2003-12-22 | 2003-12-22 | Liquid discharging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11244757A true JPH11244757A (en) | 1999-09-14 |
| JP3597695B2 JP3597695B2 (en) | 2004-12-08 |
Family
ID=12988211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5506298A Expired - Lifetime JP3597695B2 (en) | 1998-03-06 | 1998-03-06 | Liquid ejection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3597695B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002326715A (en) * | 2001-05-01 | 2002-11-12 | Musashi Eng Co Ltd | Liquid material discharging method and its device |
| WO2006077875A1 (en) * | 2005-01-18 | 2006-07-27 | Musashi Engineering, Inc. | Liquid discharge device |
| JP2010258001A (en) * | 2009-04-21 | 2010-11-11 | Panasonic Corp | Paste coating apparatus, electronic component joining apparatus, paste coating method, and electronic component joining method |
| JP2010258002A (en) * | 2009-04-21 | 2010-11-11 | Panasonic Corp | Paste coating apparatus, electronic component joining apparatus, paste coating method, and electronic component joining method |
| JP2010263099A (en) * | 2009-05-08 | 2010-11-18 | Panasonic Corp | Paste coating apparatus, electronic component joining apparatus, paste coating method, and electronic component joining method |
| JP2010263098A (en) * | 2009-05-08 | 2010-11-18 | Panasonic Corp | Paste coating apparatus, electronic component joining apparatus, paste coating method, and electronic component joining method |
| JP2010283113A (en) * | 2009-06-04 | 2010-12-16 | Panasonic Corp | Paste coating apparatus, electronic component joining apparatus, paste coating method, and electronic component joining method |
| WO2012132148A1 (en) * | 2011-03-28 | 2012-10-04 | 三洋電機株式会社 | Dispensing device and dispensing system |
| CN105032722A (en) * | 2014-05-02 | 2015-11-11 | 兵神装备株式会社 | Fluid discharging system and reservoir |
| CN111992433A (en) * | 2020-08-17 | 2020-11-27 | 海宁市天翼龙电器有限公司 | Can be according to LED lamp dispensing device of glue viscosity adjustment atmospheric pressure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6313278U (en) * | 1985-12-27 | 1988-01-28 | ||
| JPH02122858A (en) * | 1988-10-31 | 1990-05-10 | Sharp Corp | Liquid material quantitative discharge device |
| JPH06199399A (en) * | 1993-01-07 | 1994-07-19 | Tatsuno Co Ltd | Air-pump for oil-feeding device provided with oil-sort judging function |
-
1998
- 1998-03-06 JP JP5506298A patent/JP3597695B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6313278U (en) * | 1985-12-27 | 1988-01-28 | ||
| JPH02122858A (en) * | 1988-10-31 | 1990-05-10 | Sharp Corp | Liquid material quantitative discharge device |
| JPH06199399A (en) * | 1993-01-07 | 1994-07-19 | Tatsuno Co Ltd | Air-pump for oil-feeding device provided with oil-sort judging function |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002326715A (en) * | 2001-05-01 | 2002-11-12 | Musashi Eng Co Ltd | Liquid material discharging method and its device |
| TWI381117B (en) * | 2005-01-18 | 2013-01-01 | 武藏工業股份有限公司 | Liquid discharge device |
| WO2006077875A1 (en) * | 2005-01-18 | 2006-07-27 | Musashi Engineering, Inc. | Liquid discharge device |
| EP1839763A4 (en) * | 2005-01-18 | 2008-07-16 | Musashi Engineering Inc | LIQUID DISCHARGE DEVICE |
| KR100969340B1 (en) * | 2005-01-18 | 2010-07-09 | 무사시 엔지니어링 가부시키가이샤 | Liquid discharge device |
| US8251261B2 (en) | 2005-01-18 | 2012-08-28 | Musashi Engineering, Inc. | Liquid delivery apparatus |
| JP2010258001A (en) * | 2009-04-21 | 2010-11-11 | Panasonic Corp | Paste coating apparatus, electronic component joining apparatus, paste coating method, and electronic component joining method |
| JP2010258002A (en) * | 2009-04-21 | 2010-11-11 | Panasonic Corp | Paste coating apparatus, electronic component joining apparatus, paste coating method, and electronic component joining method |
| JP2010263099A (en) * | 2009-05-08 | 2010-11-18 | Panasonic Corp | Paste coating apparatus, electronic component joining apparatus, paste coating method, and electronic component joining method |
| JP2010263098A (en) * | 2009-05-08 | 2010-11-18 | Panasonic Corp | Paste coating apparatus, electronic component joining apparatus, paste coating method, and electronic component joining method |
| JP2010283113A (en) * | 2009-06-04 | 2010-12-16 | Panasonic Corp | Paste coating apparatus, electronic component joining apparatus, paste coating method, and electronic component joining method |
| WO2012132148A1 (en) * | 2011-03-28 | 2012-10-04 | 三洋電機株式会社 | Dispensing device and dispensing system |
| JPWO2012132148A1 (en) * | 2011-03-28 | 2014-07-24 | パナソニックヘルスケア株式会社 | Dispensing device and dispensing system |
| JP2015186803A (en) * | 2011-03-28 | 2015-10-29 | パナソニックヘルスケアホールディングス株式会社 | Dispensing device and dispensing system |
| US9347858B2 (en) | 2011-03-28 | 2016-05-24 | Panasonic Healthcare Holdings Co., Ltd. | Dispensing device and dispensing system |
| CN105032722A (en) * | 2014-05-02 | 2015-11-11 | 兵神装备株式会社 | Fluid discharging system and reservoir |
| CN111992433A (en) * | 2020-08-17 | 2020-11-27 | 海宁市天翼龙电器有限公司 | Can be according to LED lamp dispensing device of glue viscosity adjustment atmospheric pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3597695B2 (en) | 2004-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1795270B1 (en) | Device for discharging fixed quantity of liquid | |
| CN111545418B (en) | Liquid material discharge device | |
| JP2004249243A (en) | System for supplying material | |
| JPH11244757A (en) | Liquid discharging device | |
| CN111185347A (en) | Quantitative discharge device | |
| JP4512680B2 (en) | Material supply system | |
| US12311400B2 (en) | Twin-fluid nozzle spray apparatus | |
| KR101683660B1 (en) | Method and device for discharging a fixed amount of liquid | |
| JP2004105968A (en) | Liquid discharging device | |
| JPH03217271A (en) | Constant-amount discharger for liquid | |
| US8220661B2 (en) | Apparatus for dispensing measured quantities of liquid | |
| CN100543429C (en) | Method of operating a pneumatic device for the metered supply of liquids and a pneumatic device | |
| JP2822048B2 (en) | Pressure change type dispensing quantity stable dispense control device of fixed quantity dispensing device | |
| TWM552845U (en) | Pressure-compensation-controlled feeding system | |
| HK1107303B (en) | Device for discharging fixed quantity of liquid | |
| JP2000283111A (en) | Supplying device for high pressure air | |
| JP3580353B2 (en) | Pressure generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20040831 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20040909 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070917 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080917 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090917 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100917 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110917 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110917 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120917 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120917 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130917 Year of fee payment: 9 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |