JP2851034B1 - Output state abnormality detection device for electrostatic coating machine - Google Patents
Output state abnormality detection device for electrostatic coating machineInfo
- Publication number
- JP2851034B1 JP2851034B1 JP10034290A JP3429098A JP2851034B1 JP 2851034 B1 JP2851034 B1 JP 2851034B1 JP 10034290 A JP10034290 A JP 10034290A JP 3429098 A JP3429098 A JP 3429098A JP 2851034 B1 JP2851034 B1 JP 2851034B1
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- abnormality detection
- coating machine
- electrostatic coating
- output state
- 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
Abstract
【要約】
【課題】 印加電圧が低く、還流電流が小さい場合に
は、しきい値と正常時の電圧差とが接近するため、希
に、または、短時間だけしきい値を下回っても正常な塗
装が行われて、塗装を停止する必要がない場合がある
が、従来の静電塗装機ではしきい値を下回ると必ず塗装
が停止されるようになっていて、作業能率が低くなると
いう課題があった。
【解決手段】 電流検知用抵抗８の前後の電圧差の大き
さが予め設定したしきい値を予め設定した時間内におい
て予め設定した回数より多く下回った場合、または、し
きい値を下回った時間が予め設定した時間を越えた場合
に異常検知信号を発するようにした。Abstract: PROBLEM TO BE SOLVED: To reduce the threshold voltage and the voltage difference in normal operation when the applied voltage is low and the return current is small, so that the threshold voltage can be reduced to normal even rarely or for a short time. In some cases, it is not necessary to stop the painting, but with the conventional electrostatic painting machine, the painting is always stopped when the value falls below the threshold, which lowers the work efficiency. There were challenges. SOLUTION: When the magnitude of a voltage difference before and after a current detecting resistor 8 falls below a preset threshold value by more than a preset number of times within a preset time period, or when the magnitude falls below the threshold value. Generates an abnormality detection signal when the time exceeds a preset time.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高電圧発生器がス
プレイガンに内蔵されて低電圧交流電源ユニットとの間
を送電ケーブルと高電圧電流帰還ケーブルとで接続し、
その高電圧電流帰還ケーブルの途中に設けた帰還電流検
知用抵抗の両端電位により静電塗装機の出力状態の異常
を検知するようにした静電塗装機の出力状態異常検知装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high voltage generator built in a spray gun, which is connected to a low voltage AC power supply unit by a power transmission cable and a high voltage current feedback cable,
The present invention relates to an output state abnormality detection device for an electrostatic coating machine that detects an abnormality in the output state of the electrostatic coating machine based on the potential at both ends of a feedback current detection resistor provided in the middle of the high voltage current feedback cable.
【０００２】[0002]
【従来の技術】従来、このような検知装置においては、
帰還電流検知用抵抗の両端電位が一定のしきい値以下に
低下したことにより異常信号を発して電源を遮断するな
どの手段が講じられるようになっていた。2. Description of the Related Art Conventionally, in such a detecting device,
When the potential at both ends of the feedback current detecting resistor drops below a certain threshold value, a measure such as shutting off the power supply by generating an abnormal signal has been taken.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、印加電
圧が低く、帰還電流が小さい場合には、しきい値と正常
時の電圧差とが接近するため、希に、または、短時間だ
けしきい値を下回っても正常な塗装が行われて、塗装を
停止する必要がない場合があるが、従来の装置ではしき
い値を下回ると必ず塗装が停止されるようになってい
て、作業能率が低くなるという課題があった。However, when the applied voltage is low and the feedback current is small, the threshold value and the voltage difference in the normal state approach each other. In some cases, it is not necessary to stop the coating even if the value falls below the normal value.However, with the conventional equipment, the coating is always stopped when the value falls below the threshold value. There was a problem of becoming.
【０００４】[0004]
【課題を解決するための手段、作用及び効果】本発明は
このような課題を解決するための手段として、帰還電流
検知用抵抗の両端電位が予め設定したしきい値を予め設
定した時間内において予め設定した回数より多く下回っ
た場合、または、しきい値を下回った時間が予め設定し
た時間を越えた場合に異常検知信号を発するようにした
から、両端電位がしきい値を下回ることがあっても、そ
れが、希に、または、短時間生じるものであって、正常
な塗装に影響が無い場合には塗装を継続するようにした
から、塗装作業の能率が向上する効果がある。According to the present invention, as a means for solving such a problem, the potential at both ends of a feedback current detecting resistor is set to a predetermined threshold value within a predetermined time. Since an abnormality detection signal is issued when the number of times falls below a preset number of times or when the time below the threshold exceeds a preset time, the potential at both ends may fall below the threshold. However, in the case where it occurs rarely or for a short time and the normal coating is not affected, the coating is continued, so that the efficiency of the coating operation is improved.
【０００５】[0005]
【発明の実施の形態】以下、本発明の一実施の形態を添
付図面に基づいて説明する。図１において、１は高電圧
発生器２を内蔵したスプレイガンであって、コントロー
ラ３を介して商用交流電源５からケーブル４を通して低
電圧交流電圧が高電圧発生器２に供給され、スプレイガ
ン１から噴出する霧状の塗料に高電圧が印加されて静電
界の作用により、接地されたコンベアｂに吊り下げられ
た被塗装物ａに塗着するようになっている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a spray gun having a built-in high-voltage generator 2. A low-voltage AC voltage is supplied to the high-voltage generator 2 from a commercial AC power supply 5 via a controller 3 via a controller 3. A high voltage is applied to the mist-like paint ejected from the hopper, and an electrostatic field acts on the mist-like paint to apply the paint to the workpiece a suspended from the grounded conveyor b.
【０００６】図２はスプレイガン１とコントローラ３の
詳細を示すものであって、スプレイガン１は高電圧発生
器２がトランス１０を介してケーブル４内の送電ケーブ
ル１１によりコントローラ３内の低電圧交流電源ユニッ
ト６に接続されており、スプレイガン１にはケーブル４
内の接地された高電圧電流帰還ケーブル１２が接続され
ているとともに、低電圧交流電源ユニット６内には高電
圧電流帰還ケーブル１２の帰還電流検知用抵抗８が設け
られ、さらに、コントローラ３内には本発明に係る出力
状態異常検知装置９と高電圧開閉スイッチ７が設けられ
ている。FIG. 2 shows details of the spray gun 1 and the controller 3. The spray gun 1 has a high voltage generator 2 which is connected to a low voltage in the controller 3 by a power transmission cable 11 in a cable 4 via a transformer 10. The spray gun 1 is connected to an AC power supply unit 6 and a cable 4
The grounded high voltage current feedback cable 12 is connected, and the low voltage AC power supply unit 6 is provided with a feedback current detecting resistor 8 of the high voltage current feedback cable 12. Is provided with an output state abnormality detection device 9 according to the present invention and a high voltage on / off switch 7.
【０００７】出力状態異常検知装置９は、図３に示すよ
うに、帰還電流検知用抵抗８の両端電位を検知して増幅
する増幅回路１４と、最低許容電圧（しきい値）などを
入力する条件設定回路１６と、増幅回路１４からの出力
を条件設定回路１６の設定条件と比較する比較回路１５
と、比較の結果、検出値が設定条件の範囲内であるか否
かを判定する判定回路１７と、判定結果がＮＯである場
合に低電圧交流電源ユニット６の開閉スイッチ７を開く
信号を出力する高電圧「切」信号出力回路１８とが含ま
れる。As shown in FIG. 3, the output state abnormality detecting device 9 receives an amplifying circuit 14 for detecting and amplifying a potential between both ends of the feedback current detecting resistor 8, a minimum allowable voltage (threshold) and the like. A condition setting circuit 16 and a comparison circuit 15 for comparing an output from the amplifier circuit 14 with a setting condition of the condition setting circuit 16
And a determination circuit 17 for determining whether or not the detected value is within a set condition as a result of the comparison, and outputting a signal for opening the open / close switch 7 of the low-voltage AC power supply unit 6 when the determination result is NO. And a high-voltage “off” signal output circuit 18.
【０００８】条件設定回路１６は、通常はしきい値だけ
であるが、本実施の形態においては、その外に、計測時
間とその計測時間内にしきい値を下回ってもそれが許容
される限度の回数、または、しきい値を連続して下回っ
た場合の許容限度時間を任意に設定することができるよ
うになっている。The condition setting circuit 16 normally has only a threshold value. However, in this embodiment, besides the above, the measurement time and the limit to which the value falls below the threshold value within the measurement time are allowed. It is possible to arbitrarily set the number of times or the allowable limit time when the value continuously falls below the threshold value.
【０００９】そして、増幅回路１４で増幅された帰還電
流検知用抵抗８の両端電位が比較回路１５においてしき
い値と比較され、判定回路において一定の計測時間内に
しきい値を下回った回数、または、しきい値を連続して
下回った時間が条件設定回路１６において設定された条
件の範囲内であるか否かが判定回路１７で判定され、範
囲外の場合に高電圧「切」信号出力回路１８が作動して
コントローラ３内の高電圧開閉スイッチ７が開いて高電
圧の印加が停止するようになっている。Then, the potential at both ends of the feedback current detecting resistor 8 amplified by the amplifier circuit 14 is compared with a threshold value in the comparator circuit 15, and the number of times the judgment circuit drops below the threshold value within a certain measurement time, or The determination circuit 17 determines whether or not the time continuously falling below the threshold is within the range of the condition set by the condition setting circuit 16. If the time is outside the range, the high voltage "OFF" signal output circuit 18 operates to open the high voltage on / off switch 7 in the controller 3 to stop application of high voltage.
【００１０】本実施の形態は上記構成になるから、印加
電圧が低く、帰還電流が小さい場合でも正常な塗装作業
を能率よく行うことができる。[0010] Since the present embodiment has the above-described configuration, a normal coating operation can be performed efficiently even when the applied voltage is low and the feedback current is small.
【図１】本発明の一実施の形態の概要を示す説明図であ
る。FIG. 1 is an explanatory diagram showing an outline of an embodiment of the present invention.
【図２】その詳細を示す説明図である。FIG. 2 is an explanatory diagram showing the details.
【図３】出力状態異常検知装置の構成を示すブロック図
である。FIG. 3 is a block diagram illustrating a configuration of an output state abnormality detection device.
１：スプレイガン ２：高電圧発生器 ７：開閉スイッチ ８：帰還電流検知用抵抗 ９：出力状態異常検知装置 1: spray gun 2: high voltage generator 7: open / close switch 8: feedback current detection resistor 9: output state abnormality detection device
Claims (1)
て低電圧交流電源ユニットとの間を送電ケーブルと高電
圧電流帰還ケーブルとで接続し、該高電圧電流帰還ケー
ブルの途中に設けた帰還電流検知用抵抗の両端電位によ
り静電塗装機の出力状態の異常を検知するようにした静
電塗装機の出力状態異常検知装置において、前記帰還電
流検知用抵抗の両端電位が予め設定したしきい値を予め
設定した時間内において予め設定した回数より多く下回
った場合、または、前記しきい値を下回った時間が予め
設定した時間を越えた場合に異常検知信号を発するよう
にした静電塗装機の出力状態異常検知装置。1. A high-voltage generator is built in a spray gun, connects a low-voltage AC power supply unit with a power transmission cable and a high-voltage current feedback cable, and provides a feedback provided in the middle of the high-voltage current feedback cable. In the output state abnormality detection device for an electrostatic coating machine, which detects an abnormality in the output state of the electrostatic coating machine based on the potential at both ends of the current detection resistor, the potential at both ends of the feedback current detection resistor is set in advance. An electrostatic coating machine that issues an abnormality detection signal when the value falls below a preset number of times within a preset time, or when the time below the threshold exceeds a preset time. Output status abnormality detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10034290A JP2851034B1 (en) | 1998-01-30 | 1998-01-30 | Output state abnormality detection device for electrostatic coating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10034290A JP2851034B1 (en) | 1998-01-30 | 1998-01-30 | Output state abnormality detection device for electrostatic coating machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2851034B1 true JP2851034B1 (en) | 1999-01-27 |
| JPH11216395A JPH11216395A (en) | 1999-08-10 |
Family
ID=12410035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10034290A Expired - Fee Related JP2851034B1 (en) | 1998-01-30 | 1998-01-30 | Output state abnormality detection device for electrostatic coating machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2851034B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107583812B (en) * | 2017-08-31 | 2019-06-04 | 新疆金风科技股份有限公司 | Automatic roller coating equipment |
-
1998
- 1998-01-30 JP JP10034290A patent/JP2851034B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11216395A (en) | 1999-08-10 |
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