JP2010051872A - High voltage supply controller for electrostatic coating - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To set a method of changing the charge voltage of a charge control device to a method adapted to a use condition so as to be properly used when an electrostatic coater is used. <P>SOLUTION: The electrostatic coating control device requiring different high voltage, for example, according to a coating material to be used is provided with: a selection key for changing the output voltage in a plurality of the different voltages capable of being output, a definition key for the voltage to be output; and a switch for selecting any one of a case that the voltage is output by a single operation of the selection key for the output voltage and a case that the voltage is output by a plurality of operations of the selection key for the output voltage and the definition key for the output voltage. The definition key is constituted so to be operated after the selection key is operated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a control device capable of switching a voltage according to the conditions of a coating machine used as a control device for supplying a high voltage to an electrostatic coating machine in electrostatic coating.

Electrostatic coating has long been adopted as a coating method that enables an increase in coating efficiency due to high-voltage static electricity, and its usage trend tends to increase due to recent environmental impacts and effective use of resources. Due to the expansion of various paints and coating conditions and the coating machines applied to them, the electrostatic coating apparatus itself has been diversified. Generally, the high voltage necessary for electrostatic painting is as high as 40 to 80 kV, and the occurrence of sparks at the painting site is a fatal problem.

For this reason, a control device is indispensable for managing the charging state suitable for the coating conditions and monitoring the grounding state and the excessive current value to ensure safety. In such a high voltage control device, as the most basic control, a high voltage is supplied with the operation of the spray gun, the supply is cut off when the operation is stopped, and an excessive current flows for safety as described above. In some cases, the system controls the paint conditions, such as shutting off the power supply, checking the grounding condition, sending an alarm or stopping the operation if it is dangerous.

In addition, with the diversification of painting conditions, the types of specifications to which electrostatic painting guns are applicable are also expanding, and the charging voltage is selected according to the painting conditions, so that it has changed to have a configuration that allows painting in the optimum state. Yes. For example, in the recent application of electrostatic coating with water-based paints, it is not preferable for safety to directly charge because the paint is conductive, and a method of charging the paint with an external electrode is used. In the case of electrostatic coating guns, it is recommended to select the charged electrode to be installed according to the conditions such as paint and painting, and use it in the optimum state, and the optimum voltage will be selected also by the installed charged electrode. Become.

However, the ability to supply different voltages can pose a danger due to the high voltage if the operator accidentally operates to supply an inappropriate high voltage. Therefore, when switching to the required voltage, as a means to prompt the operator to confirm, perform an operation that enables voltage switching, then select the necessary voltage, and then perform a confirmation operation to move to execution The switch is configured to complete. In other words, a means that can be switched by operating a plurality of keys is taken to avoid dangers caused by inadvertent switching or accidental switching.

On the other hand, the simplification of the operation is important for the operator, and it is inconvenient depending on the situation of the user and may require improvement. In other words, not only the above operations, work procedures are defined under proper production management, workers are not necessarily fixed, and when performed by a large number of people, especially inexperienced operators can operate, When an operator operates for a period of time that is used only for a period of time, it is preferable to use the above-described plurality of keys because safety is important. However, it is effective for the small-scale and high-variety traders who are handled exclusively by skilled workers, have many work changes, do not have sufficient facilities, and have to deal with frequent switching. .

As described above, the situation on the side where the device is used is each, improving the complicated operation by switching operation of voltage setting with multiple keys so far, improving productivity, and operating by unspecified workers, safety It is an object of the present invention to make it possible to cope with an operation error when importance is attached to performance.

In the electrostatic painting control device that supplies the control voltage to the electrostatic painting gun and manages the electrostatic painting by grasping the charging status, it is possible to output different voltages, and a voltage selection key for switching the output voltage, An output voltage confirmation key, and a switch for selecting when the voltage is output by operating the voltage selection key alone and when the voltage is output by a plurality of operations of the voltage selection key and the output voltage determination key. .

In the case of a plurality of operations, a selection mode key that enables the input of a voltage selection key is provided so that the input can be made only after the selection mode is set.

According to the present invention, when setting a high voltage to be supplied to the electrostatic coating gun, a voltage is output by a plurality of operations of a voltage selection key and an output voltage confirmation key when the voltage is output by a single operation. If there is a possibility that the operator is unfamiliar, operates temporarily, or may be operated by an unspecified person, safety can be improved by operating multiple keys. It is possible to select one of the operation methods that can be used with a single key operation to ensure a reliable operation without any possibility of erroneous operation and when workability is important.

Therefore, it has been necessary to manufacture devices with different specifications so far, but they can be shared and rationalized in production management. If this switch is provided inside the apparatus and does not allow the user to operate it, it can be provided as a dedicated apparatus limited to the user. In addition, the user can select which method to use according to the situation by operating this switch, and the application can be expanded in a large-scale factory.

FIG. 1 shows an operation panel portion of an electrostatic coating control apparatus for explaining the present invention. Although the internal configuration and unnecessary parts are omitted, the general-purpose power supply is normally turned on by the power switch 1 to drive the control device. Unlike the case where a high DC voltage is supplied by an internal high voltage generator, the control device used when the high voltage generator is incorporated in the electrostatic coating gun is a voltage lower than the output terminal 2 ( DC power is output and supplied to the electrostatic coating gun 4 through the low voltage cable 3. The output power is supplied by the operation of the connected electrostatic painting gun 4 and is configured to be cut off when the electrostatic gun stops. If no charge is selected, a high voltage is applied regardless of the operation of the electrostatic gun. Is normally configured not to be output.

In the control device, the low voltage to be output in order to obtain the required high voltage is determined in advance according to the specifications of the high voltage generator incorporated in the electrostatic coating gun to be connected. There are three voltage selection buttons 5 of 40 kV, 50 kV, and 60 kV, and by selecting each of them, a low voltage necessary to obtain a corresponding load voltage with an electrostatic coating gun is supplied. ing.

In addition, a selection mode button 6 and a confirmation button 7 that enable input of the voltage selection button 5 are provided. After the selection mode button is turned ON to enable input, a predetermined voltage is input by any of the voltage selection buttons 5. When the confirmation button 7 is pressed, a predetermined voltage is supplied from the output terminal 2 from the next charging. These operations are performed in order to surely change the charge voltage, so that the operator is confirmed and the switch is made immediately when the button is inadvertently pressed to prevent an unexpected situation. The selection mode button may be actuated for a certain period of time as necessary, or may be actuated simultaneously with other keys, or may be used in combination to further increase certainty.

In addition, the control device is provided with a display board 8 on which the painting management status and the selected voltage can be confirmed by digital values, a current value indicator 9 used, a warning lamp 10 for notifying various abnormalities, etc. Details are not directly related and will be omitted. As described above, the conversion of the output voltage with respect to these settings, the control of the output with respect to the input signal, and the like are performed by the microcomputer incorporated in the substrate including the storage device.

Furthermore, a control operation in which a predetermined voltage is output to the substrate only by inputting the voltage selection key, and a control operation in which a predetermined voltage is output by operating a plurality of keys including the selection mode button 6 and the confirmation button 7; A switch 11 for switching between is provided, and any one of them can be selected.

In such a case, it is necessary to open the operation internal panel of the control device and switch the switch. good. If it is provided inside, it can be shared as a device with any operation method in manufacturing, and it is effective for rationalization.If it is provided outside, the user can select it according to the usage form, so that the device can be used effectively. can get.

It is explanatory drawing which shows the operation panel of the high voltage supply control apparatus with which this invention is applied.

Explanation of symbols

1, power switch
2, output terminal
3, low voltage cable
5, voltage selection button
6, selection mode button
7, Confirm button 8, Display board
11, switch

Claims (2)

In the electrostatic coating control device that has a voltage supply device that boosts the general-purpose power source to a high voltage and supplies it to the electrostatic gun, it is possible to output different voltages, a voltage selection key for setting the output voltage, and confirmation of the output voltage And a selector switch for selecting a case where a voltage is output by a single operation of the voltage selection key and a case where a voltage is output by a plurality of operations of a voltage selection key and an output voltage confirmation key. High voltage supply controller for electrostatic painting.
The high voltage supply control device for electrostatic coating according to claim 1, further comprising a selection mode key that enables input of a voltage selection key in the case of the plurality of operations.

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