JPS60168559A - Spray painting equipment - Google Patents

Abstract

PURPOSE:To perform accurate ventilation, by detecting the mist amount of an excessive spray paint on the basis of working information and increasing the air amount of a ventilation apparatus as the detection signal becomes large. CONSTITUTION:The mist amount of an excessive spray paint is detected on the basis of information from a working operation discrimination means 4 for controlling the program of a working apparatus 3 by a detection means 11 and a ventilation air amount is automatically controlled on the basis of the information from said detection means 11. By this method, the accurate control of the ventilation air amount is continued well corresponding to the mist amount of the excessive spray paint.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to equipment for spray painting various objects to be painted, such as automobile bodies and home appliance casings. This invention relates to spray painting equipment equipped with a ventilation system to remove excess spray paint mist from the air.

Traditionally, spray painting equipment was of the type in which workers used spray guns to spray paint the objects to be painted, but in recent years, painting work equipment such as painting robots has made it possible to
The type described above is common, in which the object to be coated is spray coated fully automatically based on a preset time schedule.

In such automatic spray painting equipment, when ventilation is carried out to remove excess spray paint mist from the spray painting room, the ventilation equipment must be adjusted to an air volume that is approximately equal to the predicted maximum amount of excess spray paint mist in the room. The ventilation air volume was set and the ventilation system was operated continuously during the painting process to maintain the set air volume.

However, during multi-coating painting, which is called the on-queuto method, the work equipment stops operating while the object to be coated is left, and the number of spraying equipment operating as the painting process progresses. The position of the indoor spray paint mist may be affected by changes in the work operation of the work equipment, such as movement of the spray target area or change in the spray direction of the work equipment due to the shape of the target area.
(f)) changes greatly over time, as shown in Figure 4, for example, and the ventilation system must be continuously operated at a large set air volume commensurate with the predicted maximum mist amount despite the mist change. This had the problem of a huge waste of power for the ventilation system.

Therefore, the amount of paint mist (@ degree) in the room or in the exhaust gas from the room is detected using various detection devices such as an optical mist particle number detection device and a CH concentration detection device, and based on the detection results, Automatically controlling the air volume of the ventilation system could be considered, but since the gas containing paint mist is directly detected, it is technically extremely difficult to prevent the paint mist from sticking to the detection device. However, the detection function of the detection device may be damaged at an early stage, making ventilation air flow rate control inappropriate, and maintenance may be required, which are disadvantageous to practical use.

An object of the present invention is to make it possible, through rational improvement, to continue to maintain appropriate ventilation air volume control in accordance with the amount of excess sprayed paint mist.

The characteristic configuration of the spray painting equipment according to the present invention is that the amount of spray paint mist is detected based on the work operation information given from the means for recognizing the painting work operation of the work device that performs eye movement spray painting on the object to be painted. A control device is provided which automatically changes the X amount of the ventilation system to a larger value as the detected amount of spray paint mist increases based on the information from the detection means. The effects are as follows.

In other words, the amount of surplus spray paint mist in the room depends on the operating state of the working equipment, whether the object to be painted is left unsprayed, and how many working equipment are in spraying operation. Alternatively, the amount of excess spray paint mist in a room is detected from the work operation information of the work equipment, paying attention to the fact that the spraying direction of each work equipment is almost determined by the orientation, etc. therefore,
Since the amount of paint mist that changes over time can be detected appropriately and well without any deterioration in detection function due to mist adhesion, the control device can control the ventilation air flow and amount based on the detection results. IQ) Control t% Figure 4 (a), (b)
As shown in the figure, the amount of excess spray paint mist in the room ((
2) can be carried out continuously under appropriate conditions, and as a result, the environment inside the spray painting room can be continuously maintained in a predetermined state, and the power consumption of the ventilation system can be greatly reduced. I was able to do it.

Next, an embodiment will be described based on the drawings.

As shown in Figure 9J11, the pre-painting treatment section (Al and drying/
A plurality of spray painting rooms (1) are provided in parallel between the post-processing section (BL) for baking, etc., and each of the spray painting rooms (1) and the pre- and post-processing sections 1AL, FBL and T-to-be-painted are connected to each other. It is connected by a conveyor 121 for conveying objects.

To configure the spray painting room (1), as shown in FIGS. 2 and 8, the spray gun ( A plurality of articulated painting robots (8) that paint by spraying paint from 8A) are arranged on both sides of the conveyance path, and based on a preset time schedule,
Starting and stopping the spraying operation of each painting robot (3), changing the spraying position,
as well as.

It is equipped with a program controller (4) that automatically performs various adjustments such as changing the direction of spraying at once.

Then, there is an air supply 7 an I5) that blows ventilation air downward from a filter-mounted Suita port (5A) provided over almost the entire ceiling of the spray painting room (1), and almost the entire surface 'fr'. , a 7-amp exhaust system (7 amps) that forcibly exhausts indoor air from the floor (6) formed with iron gratings (grating).
), thereby configuring the ventilation system +51, 171 that removes the spray paint mist generated during spray painting from the room together with the exhaust air, and the ventilation system (5
1. In the middle of the exhaust thread path of +71, using the path of inertial mass between the exhaust air and paint mist, cleaning water of the exhaust air (W process), (contained in the exhaust air due to collision with W) First and second mist removal devices 181 and 191 are interposed in series to collect paint mist in cleaning water (Wl), . . . (Wl).

By changing the rotational speeds of the air supply 7 amps, 51, and exhaust fan (7), both 7 amps F51 *
A fan controller > 1101 is installed to change the air supply volume of +71, that is, the ventilation air volume to the room, and to control the change in the amount of paint mist sprayed indoors due to changes in performance and a series of work operations of the group of painting robots (3). A calculation detector [111t - A control device that provides an air volume control command to the fan controller 1lol so as to increase the ventilation air volume as the detected mist amount increases, based on the information from between the calculation detectors!
! (I2J is provided.

In other words, in the case of wet-on-wet painting, the painting robot stops operating while the object is left to be painted, the number of spraying robots (3) changes as the painting process progresses, and the cost per spraying target location changes. Due to changes in the work operation of each painting robot (3), such as changes in the spraying direction of each painting robot (3) depending on the shape of the target area, the amount of indoor surplus spray paint mist (Gl) changes over time as shown in Figure 4 (A). The system is configured to change the ventilation air volume (Ql k ) so as to match the indoor surplus spray paint mist amount (Gl) at each point in time, as shown in Figure 4 (b). .

Next, another embodiment will be described.

The equipment for automatically spray painting i-painting sheds can be modified in various ways, such as using an articulated painting robot such as the one described above, as well as a painting device equipped with spray guns that can change the direction of spraying. These devices are collectively referred to as automatic spray painting work devices (3).

As a means for recognizing the painting operation of the work equipment @ (3), instead of using a program controller (4) for the work equipment in which the actions of the work equipment (3) are stored in advance, the work equipment A sensor that directly detects the operation (3) may be attached to the work device (3), and these various means are collectively referred to as work operation recognition means (4).

As means for detecting the amount of spray paint mist based on the information from the recognition means (4) above, electric circuits and microcomputers with various configurations can be applied, and the detection and calculation flow in step 7 can also be modified in various configurations. possible, and these means are collectively referred to as surplus spray paint mist amount detection means (Ill).

The control device O based on the information from the detection means (Ill)
In order to fully automatically control the ventilation air volume (Q) by the fan, instead of applying the rotation speed control of the ventilation fans +51 and +71 as described above, the vane angle control of the fan and barrier pull pinch in the case of axial flow 7A are used. Various air volume control methods such as control can be applied, and either the air supply side or the exhaust side may be controlled by a fan, and the capacity may be controlled by a damper. ), instead of controlling the ventilation air volume (Ql) to change it in stages, continuous control may be performed.

Furthermore, instead of applying a forced air supply/exhaust method as a ventilation method, a method of only forced air supply or forced exhaust may be used, and these ventilation devices are collectively referred to as ventilation equipment (5).
(7).

The present invention is particularly effective for a stationary painting method in which the object to be painted is spray-painted while the transfer is stopped in a spray-painting room as a partitioned space, but as shown in FIG. Needless to say, the present invention can also be applied to a continuous coating type coating booth in which spray coating is carried out after moving the wave coating equipment in the direction in which they are arranged side by side.

[Brief explanation of drawings]

1 to 4 show embodiments of the present invention, in which FIG. 1 is a layout of a spray painting room, FIG. 2 is a schematic vertical sectional view thereof, FIG. 8 is a schematic plan view thereof, and FIG. Figure 4 (b) is a graph showing the change in the amount of paint mist for excessive indoor spraying, and Figure 4 (b) is a graph showing the control of the ventilation air volume. FIG. 5 is a schematic plan view showing another embodiment of the present invention. (1)...Room, (3j...Working equipment,
(4)...Work movement recognition means, t51, (
71... Ventilation system, (11)... Detection means, Sauce... Control device, (G)... Interest spray paint mist amount, (Q) ...Ventilation air volume. Agent Patent Attorney Osamu Kitamura 1g1 Figure 4 (A)

Claims (1)

[Scope of Claims] ■ A work device (3) for automatic spray painting is provided for placing the object to be coated in a chamber (1), and a ventilation system (5+1 ill) for removing spray paint mist from the chamber (1) is provided. The painting equipment includes means (i) for detecting the amount of surplus spray paint mist based on the work operation information given from the means (4) for determining the painting work operation of the work device (3).
tl is provided, and based on the information from the detection means, the larger the detected rate of spray paint mist amount (Gl), the more the ventilation device (5). Spray coating equipment that is equipped with an apparatus. ■ The spray coating according to claim 0, wherein the work operation recognition means is a program controller +41 that fully automatically operates the work device (3). Equipment. ■ The spray painting equipment according to item 0, wherein the work movement recognition means is a sensor that detects the work movement of the work device (3).