JP2587177Y2 - Electrostatic coating equipment for conductive paint - Google Patents
Electrostatic coating equipment for conductive paintInfo
- Publication number
- JP2587177Y2 JP2587177Y2 JP1993002028U JP202893U JP2587177Y2 JP 2587177 Y2 JP2587177 Y2 JP 2587177Y2 JP 1993002028 U JP1993002028 U JP 1993002028U JP 202893 U JP202893 U JP 202893U JP 2587177 Y2 JP2587177 Y2 JP 2587177Y2
- Authority
- JP
- Japan
- Prior art keywords
- paint
- cylinder
- pressure
- flow rate
- electrostatic coating
- 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
- Electrostatic Spraying Apparatus (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、高電圧が印加された静
電塗装機によって水性塗料やスラリー塗料、メタリック
塗料等の導電性塗料を塗装する静電塗装装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic coating apparatus for applying a conductive paint such as a water-based paint, a slurry paint, or a metallic paint by an electrostatic paint machine to which a high voltage is applied.
【０００２】[0002]
【従来の技術】高電圧が印加された静電塗装機で水性塗
料等の導電性塗料を塗装する場合は、静電塗装機に印加
した高電圧のリークを防止するためにその塗装機の塗料
供給系全体に絶縁対策を施すのが一般的であるが（特開
昭５５−１１４３６６号，特開昭５６−１４１８６９号
公報）、数十色もの塗料を色替して塗装する自動車塗装
用の多色静電塗装装置では、各色塗料ごとに夫々塗料供
給配管や塗料タンク等を絶縁するのが非常に面倒である
から、自動車塗装工場では、有害な有機溶剤を大量に消
費する絶縁性樹脂塗料の静電塗装が未だ主流を占めてお
り、無公害な水性塗料の静電塗装へ転換することが困難
であった。2. Description of the Related Art When a conductive paint such as a water-based paint is applied to an electrostatic coating machine to which a high voltage is applied, the paint of the coating machine is used to prevent leakage of the high voltage applied to the electrostatic coating machine. In general, insulation measures are taken for the entire supply system (Japanese Patent Application Laid-Open Nos. 55-114366 and 56-141869). In multi-color electrostatic coating equipment, it is very troublesome to insulate the paint supply pipes and paint tanks for each color paint, so in automotive paint factories, insulating resin paints that consume large amounts of harmful organic solvents Is still predominant, and it has been difficult to convert non-polluting water-based paints to electrostatic coatings.
【０００３】そこで本出願人は、公害防止の観点から水
性塗料による塗装を普及推進させるために、静電塗装機
に水性塗料等の導電性塗料を供給する塗料供給配管や塗
料タンクに面倒な絶縁対策を施さなくても済む静電塗装
装置を提案した（特開平３−１９６８６０号，特開平４
−２００６６２号，実開平４−８７７５５号〜８７７６
０号，９１７５５号及び９１７５６号公報）。これら装
置は、塗料流入口から充填された所要量の導電性塗料を
塗料吐出口から所定の流量で圧し出して高電圧が印加さ
れた静電塗装機に定量供給するシリンダ型の往復ポンプ
が、塗装機近傍に電気的絶縁状態で設置されると共に、
色替バルブで選択された所望色の導電性塗料を往復ポン
プに供給する塗料供給配管が、往復ポンプの塗料流入口
に対して所要の絶縁距離から係脱自在に連結されるよう
に成されて、その塗料供給配管や色替バルブ装置、そし
て塗料供給源となる塗料タンク等に高電圧がリークする
ことを防止している。In order to promote the use of water-based paint from the viewpoint of pollution prevention, the present applicant has to provide a paint supply pipe and a paint tank for supplying a conductive paint such as a water-based paint to an electrostatic coating machine. An electrostatic coating apparatus which does not require any countermeasures has been proposed (JP-A-3-196860, JP-A-4-196860).
No. 200662, Japanese Utility Model Application Hei 4-87755-8776
0, 91755 and 91756). These devices are cylinder type reciprocating pumps which press out a required amount of conductive paint filled from a paint inlet at a predetermined flow rate from a paint discharge port and supply a fixed amount to an electrostatic coating machine to which a high voltage is applied, Installed in the vicinity of the coating machine with electrical insulation,
A paint supply pipe for supplying a conductive paint of a desired color selected by the color changing valve to the reciprocating pump is configured to be detachably connected to a paint inlet of the reciprocating pump from a required insulation distance. The high voltage is prevented from leaking to the paint supply pipe, the color changing valve device, and the paint tank serving as the paint supply source.
【０００４】[0004]
【考案が解決しようとする課題】ところで、静電塗装機
をレシプロマシンで往復運動させる自動塗装装置にあっ
ては、静電塗装機に導電性塗料を供給する上記のポンプ
もレシプロマシンによって静電塗装機と一体的に往復運
動させなければならないので、塗装装置を小型化するた
めには、レシプロマシンで動かす静電塗装機と往復ポン
プを出来るだけ近接させて設けることが望ましい。しか
しながら，静電塗装機にポンプを近づけすぎると、その
ポンプのシリンダ内に充填された導電性塗料を圧し出す
ピストンの駆動源となるサーボモータ等に高電圧がリー
クするおそれがある。In an automatic coating apparatus that reciprocates an electrostatic coating machine with a reciprocating machine, the above-mentioned pump for supplying a conductive paint to the electrostatic coating machine is also operated by the reciprocating machine. Since the reciprocating motion must be performed integrally with the coating machine, in order to reduce the size of the coating apparatus, it is desirable to provide an electrostatic coating machine operated by a reciprocating machine and the reciprocating pump as close as possible. However, if the pump is brought too close to the electrostatic coating machine, a high voltage may leak to a servomotor or the like, which is a driving source of a piston that presses the conductive paint filled in a cylinder of the pump.
【０００５】つまり、シリンダ内の塗料を圧し出すピス
トンは、実開平４−９１７５６号公報に記載されたよう
に、防爆型電気サーボモータの回転を直線運動に変換し
て軸方向に往復運動せられる絶縁シャフト（ピストンロ
ッド）の先端に取り付けられて、駆動源となるモータへ
高電圧がリークすることを防止しているが、ポンプの本
体を成すシリンダを静電塗装機に近づけすぎるとピスト
ンを動かすモータも静電塗装機に近づくので、そのモー
タへ高電圧がリークして電気系統が破壊されるおそれが
ある。なお、絶縁シャフトで成るピストンロッドの長さ
を著しく長くすれば、ピストンとモータとの間に所要の
絶縁距離が確保されてモータへの高電圧のリークを防止
できるが、この場合はレシプロマシンに取り付けて動か
すポンプ全体の構成が長大化するので塗装装置の小型化
が図れない。That is, as described in Japanese Utility Model Application Laid-Open No. 4-91756, the piston which presses the paint in the cylinder is reciprocated in the axial direction by converting the rotation of the explosion-proof electric servomotor into a linear motion. It is attached to the tip of the insulating shaft (piston rod) to prevent high voltage from leaking to the motor that is the driving source, but if the cylinder that constitutes the pump is too close to the electrostatic coating machine, the piston moves. Since the motor also approaches the electrostatic coating machine, a high voltage may leak to the motor and the electric system may be destroyed. In addition, if the length of the piston rod, which is an insulating shaft, is significantly increased, the required insulation distance between the piston and the motor can be secured to prevent leakage of high voltage to the motor. Since the entire configuration of the pump to be mounted and moved is lengthened, the size of the coating apparatus cannot be reduced.
【０００６】そこで本考案は、静電塗装機に導電性塗料
を定量供給するポンプを小型化すると同時に、そのポン
プを高電圧が印加される静電塗装機に著しく近接させて
設けても高電圧のリークが生じないようにすることを技
術的課題としている。Accordingly, the present invention reduces the size of the pump for supplying the conductive paint to the electrostatic coating machine at the same time, and at the same time, even if the pump is provided extremely close to the electrostatic coating machine to which the high voltage is applied, the high voltage can be obtained. It is a technical problem to prevent the occurrence of a leak.
【０００７】[0007]
【課題を解決するための手段】この課題を解決するため
に、本考案は、塗料流入口からシリンダ内に充填された
導電性塗料をそのシリンダの塗料吐出口から所定の流量
で圧し出して静電塗装機に定量供給するポンプが、電気
的絶縁状態で設置されると共に、そのポンプのシリンダ
内に充填する塗料を供給する塗料供給配管が、前記塗料
流入口に対して所要の絶縁距離から係脱自在に連結され
るように成された導電性塗料の静電塗装装置において、
前記シリンダが、ピストンの両側から導電性塗料の供給
圧と絶縁管で成る給気管を通じて供給される高圧エアの
供給圧とが交互に働いてその高圧エアの圧力で導電性塗
料を圧し出す複動型シリンダで成り、当該シリンダの外
部に突出して往復運動するピストンロッドの移動速度を
非接触のセンサで検出すると共にそのピストンロッドの
移動速度に基づいて静電塗装機に供給される導電性塗料
の流量を測定する流量測定器と、当該流量測定器で測定
された流量と静電塗装機の塗料吐出量に応じて予め設定
された流量とを比較してその差値を求めると共にその差
値に応じてシリンダに供給される前記高圧エアの圧力を
可変調節する制御装置とを備えたことを特徴とする。In order to solve this problem, according to the present invention, a conductive paint filled in a cylinder from a paint inlet is pressed out at a predetermined flow rate from a paint discharge port of the cylinder to statically press the conductive paint. A pump for supplying a constant amount to the electrocoating machine is installed in an electrically insulated state, and a paint supply pipe for supplying a paint to be filled in a cylinder of the pump is connected to the paint inlet from a required insulation distance. In an electrostatic coating device of a conductive paint formed to be detachably connected,
The cylinder is double-acting in which the supply pressure of the conductive paint from both sides of the piston and the supply pressure of the high-pressure air supplied through an air supply pipe formed of an insulating tube work alternately to press the conductive paint with the pressure of the high-pressure air. A non-contact sensor detects the moving speed of a piston rod that protrudes out of the cylinder and reciprocates, and based on the moving speed of the piston rod, the conductive paint supplied to the electrostatic coating machine. The flow rate measuring device for measuring the flow rate, the flow rate measured by the flow rate measuring device and the flow rate set in advance according to the paint discharge amount of the electrostatic coating machine to determine the difference value and determine the difference value. A control device for variably adjusting the pressure of the high-pressure air supplied to the cylinder in response to the control.
【０００８】[0008]
【作用】本考案によれば、静電塗装機に導電性塗料を供
給するポンプとして、シリンダのピストンの片側に充填
された導電性塗料をそのピストンの反対側に絶縁管を通
じて供給される高圧エアの圧力で圧し出す複動型シリン
ダを用いているので、ポンプ全体を小型化することがで
きると同時に、そのポンプを静電塗装機に近接して設け
ても高電圧のリークを生ずるおそれがない。また、ポン
プの駆動源として高圧エアを用いても、その高圧エアの
圧力で導電性塗料を圧し出すピストンと一体的に連動す
るピストンロッドの移動速度が非接触のセンサで検出さ
れると共に、その移動速度に基づいて静電塗装機に供給
される導電性塗料の流量が測定されて、その流量が静電
塗装機の塗料吐出量に応じた流量になるように制御装置
で高圧エアの圧力が可変調節されるので、ポンプの定量
性が損なわれるおそれはなく、常に均一な塗装を行うこ
とができる。According to the present invention, as a pump for supplying the conductive paint to the electrostatic coating machine, the conductive paint filled on one side of the piston of the cylinder is supplied with high-pressure air supplied through the insulating tube to the opposite side of the piston. The use of a double-acting cylinder that pressurizes at a pressure of less than 2 mm makes it possible to reduce the size of the entire pump, and at the same time there is no danger of high voltage leakage even if the pump is provided close to the electrostatic coating machine. . In addition, even if high-pressure air is used as the driving source of the pump, the moving speed of the piston rod that works together with the piston that presses out the conductive paint with the pressure of the high-pressure air is detected by a non-contact sensor, and The flow rate of the conductive paint supplied to the electrostatic coating machine is measured based on the moving speed, and the control device controls the pressure of the high-pressure air so that the flow rate becomes a flow rate corresponding to the paint discharge amount of the electrostatic coating machine. Since it is variably adjusted, there is no possibility that the quantitativeness of the pump is impaired, and uniform coating can always be performed.
【０００９】[0009]
【実施例】以下、本考案の実施例を図面によって具体的
に説明する。図１は本考案による静電塗装装置の一例を
示すフローシート図、図２は他の例を示す部分拡大図で
ある。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a flow sheet diagram showing an example of the electrostatic coating apparatus according to the present invention, and FIG. 2 is a partially enlarged view showing another example.
【００１０】図１に示す静電塗装装置は、塗装時に数十
〜百数十ＫＶの高電圧が印加される静電塗装機１に水性
塗料等の導電性塗料を供給するポンプ２が電気的絶縁状
態で設置されている。このポンプ２は、塗料流入口３か
らシリンダ４内に充填された導電性塗料をそのシリンダ
４の塗料吐出口５から圧し出して静電塗装機１に供給す
るようになっている。シリンダ４は、ピストン６の両側
から導電性塗料の供給圧と高圧エアの供給圧が交互に働
いてその高圧エアの圧力で導電性塗料を圧し出す複動型
シリンダで成り、そのヘッド側に塗料流入口３と塗料吐
出口５が設けられ、ボトム側に高圧エア供給源７から高
圧エアを供給する給気管８とシリンダ４内の高圧エアを
放出する排気管９が接続されている。なお、給気管８と
排気管９は、何れもプラスチック管などの絶縁管が用い
られている。また、給気管８には、シリンダ４内に供給
される高圧エアの圧力を調節する圧力調整バルブ１０が
介装され、排気管９には、その管路を開閉するオン・オ
フバルブ１１が介装されている。In the electrostatic coating apparatus shown in FIG. 1, a pump 2 for supplying a conductive paint such as a water-based paint to an electrostatic painter 1 to which a high voltage of several tens to one hundred and several tens KV is applied at the time of painting is electrically operated. Installed in an insulated state. The pump 2 presses the conductive paint filled in the cylinder 4 from the paint inlet 3 through the paint discharge port 5 of the cylinder 4 and supplies the conductive paint to the electrostatic coating machine 1. The cylinder 4 is a double-acting cylinder which presses the conductive paint with the pressure of the high-pressure air by alternately applying the supply pressure of the conductive paint and the supply pressure of the high-pressure air from both sides of the piston 6. An inflow port 3 and a paint discharge port 5 are provided, and an air supply pipe 8 for supplying high-pressure air from a high-pressure air supply source 7 and an exhaust pipe 9 for discharging high-pressure air in the cylinder 4 are connected to the bottom side. In addition, an insulating pipe such as a plastic pipe is used for each of the air supply pipe 8 and the exhaust pipe 9. Further, a pressure adjusting valve 10 for adjusting the pressure of the high-pressure air supplied into the cylinder 4 is provided in the air supply pipe 8, and an on / off valve 11 for opening and closing the pipe is provided in the exhaust pipe 9. Have been.
【００１１】図中１２は、シリンダ４のボトム側からそ
の外部に向かって突出した絶縁シャフトで成るピストン
ロッド１３の突端と所定の絶縁距離を保って対峙する位
置に固設された光波式あるいは超音波式の距離センサで
あって、直接的にはそのセンサ１２とピストンロッド１
３の突端との間に生ずる距離の変化を検出するようにな
っている。また、１４は、センサ１２で検出した単位時
間当たりの距離の変化からピストンロッド１３の移動速
度を割り出すと共に、その移動速度に基づいて静電塗装
機１に供給される導電性塗料の流量を測定する流量測定
器である。また、１５は、流量測定器１４で測定された
流量と、静電塗装機１の塗料吐出量に応じて予め設定さ
れている流量とを比較してその差値を求めると共に、そ
の差値に応じてシリンダ４内に供給される高圧エアの圧
力を可変調節する制御信号を圧力調整バルブ１０に出力
する制御装置である。In the figure, reference numeral 12 denotes a light wave type or supersonic wave fixed at a position facing a tip end of a piston rod 13 formed of an insulating shaft projecting from the bottom side of the cylinder 4 toward the outside thereof with a predetermined insulation distance. A sound wave type distance sensor which is directly connected to the sensor 12 and the piston rod 1
A change in the distance between the tip and the tip 3 is detected. Further, 14 determines the moving speed of the piston rod 13 from the change in the distance per unit time detected by the sensor 12, and measures the flow rate of the conductive paint supplied to the electrostatic coating machine 1 based on the moving speed. Flow meter. Further, 15 compares the flow rate measured by the flow rate measuring device 14 with a flow rate set in advance according to the paint discharge amount of the electrostatic coating machine 1 to obtain a difference value, and calculates the difference value. The control device outputs to the pressure adjusting valve 10 a control signal for variably adjusting the pressure of the high-pressure air supplied to the cylinder 4 in response.
【００１２】なお、シリンダ４の塗料流入口３には、そ
の流入口３を開閉する雌形カプラー１６が設けられてい
る。また、ポンプ２のシリンダ４内に充填する導電性塗
料を塗料供給源１７から供給する塗料供給配管１８は、
その先端側に雌形カプラー１６と係脱自在に嵌合する雄
形カプラー１９が設けられ、当該雄形カプラー１９が、
エアシリンダ２０のピストンロッド２１に取り付けられ
て定位置に固定された塗料流入口３の雌形カプラー１６
に対して所要の絶縁距離から進退せられることにより、
塗料供給配管１８が塗料流入口３に対して係脱自在に連
結されるようになっている。The paint inlet 3 of the cylinder 4 is provided with a female coupler 16 for opening and closing the inlet 3. A paint supply pipe 18 for supplying a conductive paint to be filled in the cylinder 4 of the pump 2 from a paint supply source 17 is
At the tip side, a male coupler 19 is provided, which is detachably fitted to the female coupler 16, and the male coupler 19 is
Female coupler 16 of paint inlet 3 attached to piston rod 21 of air cylinder 20 and fixed in position.
By moving back and forth from the required insulation distance for
The paint supply pipe 18 is detachably connected to the paint inlet 3.
【００１３】しかして、静電塗装機１に高電圧が印加さ
れていない塗装開始前に、エアシリンダ２０のピストン
ロッド２１を伸長させて塗料供給配管１８をシリンダ４
の塗料流入口３に接続すると共に、排気管９に介装され
たバルブ１１を開放して、シリンダ４内に導電性塗料を
供給する。なお、このとき、ピストン６が導電性塗料の
供給圧を受けてシリンダ４のボトム側に移動し、それに
伴ってピストンロッド１３が距離センサ１２に向かって
接近する方向に移動する。Before the start of the coating operation in which a high voltage is not applied to the electrostatic coating machine 1, the piston rod 21 of the air cylinder 20 is extended and the coating material supply pipe 18 is connected to the cylinder 4.
And the valve 11 interposed in the exhaust pipe 9 is opened to supply the conductive paint into the cylinder 4. At this time, the piston 6 receives the supply pressure of the conductive paint and moves to the bottom side of the cylinder 4, and accordingly, the piston rod 13 moves in a direction approaching the distance sensor 12.
【００１４】そして、シリンダ４内に所要量の導電性塗
料が充填されると、排気管９のバルブ１１を閉鎖すると
共に、塗料供給配管１８をポンプ２のシリンダ４から切
り離して、静電塗装機１に印加した高電圧が塗料供給系
にリークするのを防止する。この状態で静電塗装機１に
高電圧を印加すると共に、給気管８を通じてシリンダ４
内に高圧エアを供給してそのシリンダ４内の導電性塗料
を静電塗装機１に供給する。このとき、シリンダ４内の
塗料を圧し出すピストン６の動きに伴って、シリンダ４
の外部に突出したピストンロッド１３の突端が、その突
端と対峙して設けられた距離センサ１２から離反する方
向に移動して、当該距離センサ１２との間の距離が徐々
に拡がるように変化し、その距離の変化がセンサ１２で
検出される。When the cylinder 4 is filled with a required amount of the conductive paint, the valve 11 of the exhaust pipe 9 is closed, and the paint supply pipe 18 is cut off from the cylinder 4 of the pump 2. 1 prevents the high voltage applied to 1 from leaking into the paint supply system. In this state, a high voltage is applied to the electrostatic coating machine 1 and the cylinder 4 is supplied through the air supply pipe 8.
The high-pressure air is supplied to the inside, and the conductive paint in the cylinder 4 is supplied to the electrostatic coating machine 1. At this time, with the movement of the piston 6 that presses out the paint in the cylinder 4, the cylinder 4
The protruding end of the piston rod 13 protruding to the outside moves in a direction away from the distance sensor 12 provided facing the protruding end, and changes so that the distance between the protruding end and the distance sensor 12 gradually increases. The change in the distance is detected by the sensor 12.
【００１５】また、それと同時に、流量測定器１４が、
センサ１２で検出した単位時間当たりの距離の変化から
ピストンロッド１３の移動速度を算出し、その移動速度
に基づいて静電塗装機１に供給される導電性塗料の流量
を測定する。そして、この流量測定器１４で測定した流
量が設定値を上回っている場合は、制御装置１５から圧
力調整バルブ１０に対して、高圧エアの供給圧を低下さ
せる制御信号が出力され、また、設定値を下回っている
場合は、高圧エアの供給圧を高める制御信号が出力され
る。これにより、シリンダ４内に充填された導電性塗料
を高圧エアで圧し出してもその塗料の定量性が損なわれ
て塗装ムラを生ずるおそれはない。At the same time, the flow rate measuring device 14
The moving speed of the piston rod 13 is calculated from the change in the distance per unit time detected by the sensor 12, and the flow rate of the conductive paint supplied to the electrostatic coating machine 1 is measured based on the moving speed. When the flow rate measured by the flow rate measuring device 14 exceeds the set value, a control signal for reducing the supply pressure of the high-pressure air is output from the control device 15 to the pressure adjusting valve 10, and If it is lower than the value, a control signal for increasing the supply pressure of the high-pressure air is output. As a result, even if the conductive paint filled in the cylinder 4 is pressed out with high-pressure air, the quantitativeness of the paint is impaired, and there is no possibility that coating unevenness occurs.
【００１６】また、静電塗装機１に設けた塗料のオン・
オフバルブが閉じられて塗装が中断したときは、制御装
置１５から圧力調整バルブ１０に対して高圧エアの供給
を一時停止する制御信号が出力されて、シリンダ４内に
残る塗料の圧力上昇が防止される。これにより、前記オ
ン・オフバルブを開けて塗装が再開されたときに、静電
塗装機１の塗料吐出量が急増して塗装ムラを生ずるおそ
れもなく、常に均一な塗装を行うことができる。Also, the paint on the electrostatic coating machine 1 is turned on and off.
When the coating is interrupted due to the closing of the off valve, a control signal for temporarily stopping the supply of the high-pressure air is output from the control device 15 to the pressure regulating valve 10 to prevent the pressure increase of the paint remaining in the cylinder 4. You. Thereby, when the on / off valve is opened and the coating is restarted, the coating amount can be rapidly increased by the electrostatic coating machine 1 without causing a coating unevenness.
【００１７】なお、上述した図１の静電塗装装置は、シ
リンダ４のピストンロッド１３の移動速度に基づいて静
電塗装機１に供給される導電性塗料の流量を測定した
が、シリンダ４がピストンロッド１３を有しないロッド
レス・シリンダの場合は、図２に示すようにピストン６
の移動速度に基づいて供給流量を測定すればよい。The above-described electrostatic coating apparatus shown in FIG. 1 measures the flow rate of the conductive coating material supplied to the electrostatic coating machine 1 based on the moving speed of the piston rod 13 of the cylinder 4. In the case of a rodless cylinder without the piston rod 13, as shown in FIG.
What is necessary is just to measure the supply flow rate based on the moving speed of.
【００１８】すなわち，図２に示す静電塗装装置は、シ
リンダ４の高圧エアが供給される側に、ピストン６の端
面に向かって光を放射すると同時にその端面から反射し
た光を入射させる光ファイバ２２の片端が接続され、当
該光ファイバ２２の他端が、放射光と反射光の位相差を
測定してピストン６との間の距離を検出する光波式距離
センサ２３に接続され、当該光波式距離センサ２３で検
出した距離の変化により求まるピストン６の移動速度に
基づいて流量測定器１４が静電塗装機１に供給される導
電性塗料の流量を測定するようになっており、シリンダ
４の外部からは直接検出できないピストン６の移動速度
を絶縁性の優れた光ファイバ２２を用いて光学的に検出
することにより、光波式距離センサ２３や流量測定器１
４などの電気系統に高電圧がリークすることを防止して
いる。なお、その他の構成については図１の静電塗装装
置と共通するので詳細説明は省略する。That is, the electrostatic coating apparatus shown in FIG. 2 is an optical fiber that emits light toward the end face of the piston 6 and simultaneously enters light reflected from the end face on the side of the cylinder 4 to which high-pressure air is supplied. One end of the optical fiber 22 is connected, and the other end of the optical fiber 22 is connected to a light wave type distance sensor 23 for measuring a phase difference between emitted light and reflected light to detect a distance between the piston 6 and the light wave type distance sensor 23. The flow rate measuring device 14 measures the flow rate of the conductive paint supplied to the electrostatic coating machine 1 based on the moving speed of the piston 6 determined by the change in the distance detected by the distance sensor 23. By optically detecting the moving speed of the piston 6 that cannot be directly detected from the outside using the optical fiber 22 having excellent insulation properties, the lightwave distance sensor 23 and the flow rate measuring device
4 prevents the high voltage from leaking to the electric system. The other configuration is the same as that of the electrostatic coating apparatus shown in FIG.
【００１９】[0019]
【考案の効果】以上述べたように、本考案によれば、高
電圧が印加された静電塗装機に導電性塗料を供給するポ
ンプが、シリンダ内に充填された導電性塗料を絶縁管を
通じて供給される高圧エアの圧力で圧し出す方式になっ
ているので、そのポンプ全体の構成を著しく小型化でき
ると同時に、そのポンプを静電塗装機の間近に近接して
設けても高電圧のリークを生ずるおそれがないという大
変優れた効果がある。また、シリンダ内の導電性塗料を
高圧エアで圧し出すときにピストンロッド又はピストン
の移動速度が検出され、その移動速度に基づいて静電塗
装機に供給される導電性塗料の流量が測定されて、その
流量が静電塗装機の塗料吐出量に応じた所定の流量にな
るようにシリンダ内に供給する高圧エアの圧力が可変調
節されるので、ポンプの定量性が損なわれるおそれはな
く、常に均一な塗装を行うことができるという優れた効
果もある。As described above, according to the present invention, the pump for supplying the conductive paint to the electrostatic coating machine to which the high voltage is applied is provided by the pump for supplying the conductive paint filled in the cylinder through the insulating pipe. The system is designed to pump out with the pressure of the supplied high-pressure air, so that the overall configuration of the pump can be significantly reduced, and at the same time, even if the pump is installed close to the electrostatic coating machine, high-voltage leakage will occur. There is an extremely excellent effect that there is no possibility of causing Also, when the conductive paint in the cylinder is pressed out by high-pressure air, the moving speed of the piston rod or the piston is detected, and the flow rate of the conductive paint supplied to the electrostatic coating machine is measured based on the moving speed. Since the pressure of the high-pressure air supplied into the cylinder is variably adjusted so that the flow rate becomes a predetermined flow rate corresponding to the paint discharge amount of the electrostatic coating machine, there is no possibility that the quantitativeness of the pump is impaired. There is also an excellent effect that uniform coating can be performed.
【図１】本考案による静電塗装装置の一例を示すフロー
シート図。FIG. 1 is a flow sheet diagram showing an example of an electrostatic coating apparatus according to the present invention.
【図２】本考案による静電塗装装置の他の例を示すフロ
ーシート図。FIG. 2 is a flow sheet diagram showing another example of the electrostatic coating device according to the present invention.
１・・・静電塗装機 ２・・・ポンプ ３・・・塗料流入口 ４・・・シリンダ ５・・・塗料吐出口 ６・・・ピストン ７・・・高圧エア供給源 ８・・・給気管 １０・・・圧力調整バルブ １２・・・センサ １３・・・ピストンロッド １４・・・流量測定器 １５・・・制御装置 １８・・・塗料供給配管 ２２・・・光ファイバ ２３・・・光波式距離センサ DESCRIPTION OF SYMBOLS 1 ... Electrostatic coating machine 2 ... Pump 3 ... Paint inlet 4 ... Cylinder 5 ... Paint discharge port 6 ... Piston 7 ... High-pressure air supply source 8 ... Supply Trachea 10 ... Pressure adjusting valve 12 ... Sensor 13 ... Piston rod 14 ... Flow rate measuring device 15 ... Control device 18 ... Paint supply pipe 22 ... Optical fiber 23 ... Light wave Type distance sensor
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B05B 5/16 B05B 5/025──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) B05B 5/16 B05B 5/025
Claims (2)
導電性塗料をそのシリンダの塗料吐出口から所定の流量
で圧し出して静電塗装機に定量供給するポンプが、電気
的絶縁状態で設置されると共に、そのポンプのシリンダ
内に充填する塗料を供給する塗料供給配管が、前記塗料
流入口に対して所要の絶縁距離から係脱自在に連結され
るように成された導電性塗料の静電塗装装置において、
前記シリンダが、ピストン（６）の両側から導電性塗料
の供給圧と絶縁管で成る給気管（８）を通じて供給され
る高圧エアの供給圧とが交互に働いてその高圧エアの圧
力で導電性塗料を圧し出す複動型シリンダ（４）で成
り、当該シリンダ（４）の外部に突出して往復運動する
ピストンロッド（13）の移動速度を非接触のセンサ（1
2）で検出すると共にそのピストンロッド（13）の移動
速度に基づいて静電塗装機（１）に供給される導電性塗
料の流量を測定する流量測定器（14）と、当該流量測定
器（14）で測定された流量と静電塗装機（１）の塗料吐
出量に応じて予め設定された流量とを比較してその差値
を求めると共にその差値に応じてシリンダ（４）に供給
される前記高圧エアの圧力を可変調節する制御装置（1
5）とを備えたことを特徴とする導電性塗料の静電塗装
装置。1. A pump is provided in an electrically insulated state, in which a conductive paint filled in a cylinder is pressed out from a paint inlet through a paint discharge port of the cylinder at a predetermined flow rate and is supplied to an electrostatic coating machine in a constant amount. And a paint supply pipe for supplying paint to be charged into a cylinder of the pump, the paint supply pipe being configured to be detachably connected to the paint inlet from a required insulating distance. In electrocoating equipment,
In the cylinder, the supply pressure of the conductive paint from both sides of the piston (6) and the supply pressure of the high-pressure air supplied through the air supply pipe (8) composed of an insulating tube work alternately, and the pressure of the high-pressure air causes the conductive pressure. It consists of a double-acting cylinder (4) that presses paint, and detects the moving speed of a piston rod (13) that protrudes out of the cylinder (4) and reciprocates by a non-contact sensor (1).
2) a flow meter (14) for measuring the flow rate of the conductive paint supplied to the electrostatic coating machine (1) based on the moving speed of the piston rod (13) and the flow rate meter (14); The flow rate measured in 14) is compared with a flow rate set in advance according to the paint discharge amount of the electrostatic coating machine (1) to obtain a difference value and to supply the difference value to the cylinder (4). Control device (1) that variably adjusts the pressure of the high-pressure air
5) An electrostatic coating apparatus for conductive paint, comprising:
導電性塗料をそのシリンダの塗料吐出口から所定の流量
で圧し出して静電塗装機に定量供給するポンプが、電気
的絶縁状態で設置されると共に、そのポンプのシリンダ
内に充填する塗料を供給する塗料供給配管が、前記塗料
流入口に対して所要の絶縁距離から係脱自在に連結され
るように成された導電性塗料の静電塗装装置において、
前記シリンダが、ピストン（６）の両側から導電性塗料
の供給圧と絶縁管で成る給気管（８）を通じて供給され
る高圧エアの供給圧とが交互に働いてその高圧エアの圧
力で導電性塗料を圧し出す複動型シリンダ（４）で成
り、当該シリンダ（４）の高圧エアが供給される側に、
ピストン（６）の端面に向かって光を放射すると同時に
その端面から反射した光を入射させる光ファイバ（22）
の片端が接続され、当該光ファイバ（22）の他端が、放
射光と反射光の位相差を測定してピストン（６）との間
の距離を検出する光波式距離センサ（23）に接続され、
当該光波式距離センサ（23）で検出した距離の変化によ
り求まるピストン（６）の移動速度に基づいて静電塗装
機（１）に供給される導電性塗料の流量を測定する流量
測定器（14）と、当該流量測定器（14）で測定された流
量と静電塗装機（１）の塗料吐出量に応じて予め設定さ
れた流量とを比較してその差値を求めると共にその差値
に応じてシリンダ（４）に供給される前記高圧エアの圧
力を可変調節する制御装置（15）とを備えたことを特徴
とする導電性塗料の静電塗装装置。2. A pump is provided in an electrically insulated state, in which a conductive paint filled in a cylinder is pressed out from a paint inlet through a paint discharge port of the cylinder at a predetermined flow rate and is supplied to the electrostatic coating machine in a constant amount. And a paint supply pipe for supplying paint to be charged into a cylinder of the pump, the paint supply pipe being configured to be detachably connected to the paint inlet from a required insulating distance. In electrocoating equipment,
In the cylinder, the supply pressure of the conductive paint from both sides of the piston (6) and the supply pressure of the high-pressure air supplied through the air supply pipe (8) composed of an insulating tube work alternately, and the pressure of the high-pressure air causes the conductive pressure. It consists of a double-acting cylinder (4) that presses paint, and on the side of the cylinder (4) where high-pressure air is supplied,
An optical fiber (22) that emits light toward the end face of the piston (6) and simultaneously enters light reflected from the end face.
One end of the optical fiber (22) is connected to the other end of the optical fiber (22), and the other end of the optical fiber (22) is connected to a lightwave distance sensor (23) for measuring a phase difference between emitted light and reflected light to detect a distance between the piston (6). And
A flow meter (14) for measuring the flow rate of the conductive paint supplied to the electrostatic coating machine (1) based on the moving speed of the piston (6) determined by the change in the distance detected by the lightwave distance sensor (23). ) Is compared with a flow rate measured by the flow rate measuring device (14) and a flow rate set in advance according to the paint discharge amount of the electrostatic coating machine (1), and a difference value is obtained. A control device (15) for variably adjusting the pressure of the high-pressure air supplied to the cylinder (4) in response thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993002028U JP2587177Y2 (en) | 1993-01-29 | 1993-01-29 | Electrostatic coating equipment for conductive paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993002028U JP2587177Y2 (en) | 1993-01-29 | 1993-01-29 | Electrostatic coating equipment for conductive paint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0660452U JPH0660452U (en) | 1994-08-23 |
| JP2587177Y2 true JP2587177Y2 (en) | 1998-12-14 |
Family
ID=11517886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993002028U Expired - Fee Related JP2587177Y2 (en) | 1993-01-29 | 1993-01-29 | Electrostatic coating equipment for conductive paint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2587177Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009023522A1 (en) * | 2007-08-10 | 2009-02-19 | Fanuc Robotics America, Inc. | Improved robotic apparatus and method for painting |
| JP2010274250A (en) * | 2009-05-27 | 2010-12-09 | E Tool:Kk | System for supplying multi-color coating of conductive coating |
| KR102357304B1 (en) * | 2020-05-29 | 2022-02-04 | 모루기술 주식회사 | Airless paint apparatus capable of evaluating proficiency of user |
-
1993
- 1993-01-29 JP JP1993002028U patent/JP2587177Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0660452U (en) | 1994-08-23 |
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