JPH04156972A - Film breakage inspecting device for flow coat painting equipment - Google Patents

Abstract

PURPOSE:To surely and automatically inspect the film breakage of a coating material by disposing a light source which emits light linearly and a CCD image sensor which has its visual field at a point where the coating material film is supplied to face each other with the point where the coating material film is supplied to a work in-between. CONSTITUTION:The light source 11 which emits light linearly and the CCD image sensor 12 are disposed to face each other with the point (a) where the coating material film flows down in-between. The light source 11 is so supported by a supporting stand 14 as to parallel with the downflow plane of the coating material film. The visual field of the CCD image sensor 12 is so set that the entire part of the point (a) where the coating material film flows down is visible. The CCD image sensor 12 detects the film breakage by passing the light of the light source 11 through the film breakage point in the event of the film breakage according to this constitution and, therefore, the film breakage of the coating material is surely inspected.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention inspects paint film breakage in flow coat coating equipment that supplies paint in a film form onto the surface of a workpiece from above the workpiece being transported. This article relates to a film breakage inspection device for flow coat coating equipment.

BACKGROUND OF THE INVENTION An example of flow coat coating equipment for supplying a film of paint onto the surface of a workpiece is shown in FIG. 2. In Fig. 2, ■ is a wall material work, 2, 3.
Reference numeral 4 denotes a conveying device consisting of a conhair device or the like for conveying the work l in the X direction, and above between the conveying devices 2 and 3, there is a linear opening (
A paint discharging device 6 for dropping the paint 5 in a film form from a container (not shown) is disposed in a lateral direction perpendicular to the conveyance direction.

Then, the work l
The surface of the workpiece 1 is coated efficiently by passing through the coating. Note that 7 is a spare paint discharging device that is used when changing setups.

By the way, in this type of flow coat painting equipment,
Foreign matter may clog the openings of the paint discharging devices 6 and 7, or air bubbles may enter the paint 5, causing the paint 5 to break and the coating to be incomplete.

As a means of inspecting this film breakage, for example, as shown in FIG. This membrane tear inspection device is arranged with a reflecting mirror 9 facing each other, and this membrane tear inspection device detects membrane tear by using light that passes through the pus tear when the pancreas is sliced. . Since the film breakage detection range by the phototube sensor 8 is approximately a small point-like area, a plurality of phototube sensors 8 are arranged in the horizontal direction, and the film breakage is detected by these plurality of phototube sensors 8. Ta.

Problems to be Solved by Invention However, the above-mentioned conventional membrane breakage detection device has the following problems:
Because the system only inspects multiple detection points for membrane breaks, it sometimes fails to detect small membrane breaks. In addition, the reflecting mirror 9
In some cases, the detection function of the phototube sensor 8 did not work due to paint adhering to the surface.

As an alternative, it may be possible to visually inspect the workpieces after painting.In this case, it would be time-consuming, and the entire production line would have to be stopped when a defective product is found, which would lead to a decrease in production capacity. : I'm afraid.

The present invention solves the above-mentioned problems, and aims to provide a film breakage inspection device for flow coat coating equipment that can reliably test for film breakage without requiring much effort.

Means for Solving the Problems In order to solve the above problems, the present invention includes a light source that emits linear light and a CCD image sensor whose field of view is the part where the paint film is supplied to the workpiece, with the part where the paint film is supplied to the workpiece sandwiched therebetween. They are arranged facing each other.

Effect With the above configuration, when the film breaks, the light from the linear light source reaches the CCD image sensor through the film breakage point, so the CCD image sensor detects the brightness of this light and the entire paint film supply area is illuminated. can be reliably inspected.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a perspective view showing a film breakage inspection device for flow coat coating equipment according to an embodiment of the present invention. Since the equipment for flow coat painting is the same as the conventional one, the same parts are given the same reference numerals. Therefore, its explanation will be omitted.

As shown in FIG. 1, a light source II that emits light in a linear manner and a CCD image sensor 12 are disposed facing each other with a paint film flowing down location a in between. The CCD image sensor 12 is supported by a support stand 13 and is disposed above the conveyance device 2, which is the front position of the paint film falling area a.
The support stand 1 is placed parallel to the lower surface of the paint film at the upper part of the conveying device 3, which is the back side of the paint film flowing down area a.
It is supported and arranged by 4. The field of view of the CCD image sensor [2] is set so that the entire surface of the paint film falling area a can be seen, and the length and position of the light source 11 are matched to this field of view. Note that the light source 11 uses a high frequency one to prevent flickering.

With the above configuration, when the film breaks, the light from the light source 11 that emits linear light passes through the film breakage point to the CCD image sensor 1.
2, by detecting and distinguishing the brightness of this light using the CCD image sensor 12, it is possible to reliably inspect the entire paint film supply location a for film breakage, and also to
The location where film breakage occurs can also be detected from the output image from the image sensor 12.

Effects of the Invention As described above, according to the present invention, a linear light source and a CCD image sensor whose field of view is the paint film supply location are arranged to face each other with the paint film supply location on the workpiece in between. With this system, paint film breakage can be reliably and automatically inspected, improving quality and making work more efficient.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a film breakage inspection device for flow coat coating equipment according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a conventional film breakage test device. 1... Workpiece, 2.3.4... Conveyance device, 5...
Paint, 6, 7... Confusing discharge device, 11... Light source, 1
2... CCD image sensor, a... Paint film flowing down location (paint film supply location).

Claims (1)

[Claims] 1. A film breakage inspection device for flow coat coating equipment that inspects film breakage of paint in flow coat coating equipment that supplies paint in a film form to the surface of the workpiece from an upper part of the workpiece being transported, Film breakage inspection for flow coat coating equipment, characterized in that a linearly emitting light source and a CCD image sensor whose field of view is the paint film supply location are arranged facing each other across the paint film supply location. Device.