JPH03254848A - Device for detecting adhesive primer application for attaching automobile window glass - Google Patents

Abstract

PURPOSE:To make the coating condition of an adhesive primer detectable according to a difference in output between two reflector type photoelectric sensors by providing each of the reflector type photoelectric sensor separately in the forward and rearward directions of a primer applicating brush on a primer coater. CONSTITUTION:An adhesive primer coater for use in the attachment of an automobile window glass 6 is provided with a main body 1, a primer supply pipe 14 connected to the main body 1 and a primer applicating brush 2 attached to the underside of the main body 1. A pair of reflector type photoelectric sensors 9 and 10 having a light receiving window facing toward the primer applicating surface are provided in the forward and rearward directions of the brush 2. A controller 13 measures a difference in output between the sensors 9 and 10 and detects whether or not the adhesive primer has been applied to the glass surface according to whether or not the output difference is larger than a predetermined value.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a method for determining whether or not the adhesive primer has been applied to a predetermined location of the window glass in the process of applying an adhesive primer to a bonded window glass of an automobile. This invention relates to a detection device capable of detecting.

[Conventional technology]

Generally, the front and rear window glasses of an automobile have a so-called bonded window glass structure, which is bonded to the automobile body with an adhesive.

Therefore, in automobile manufacturing plants, there is a process to apply adhesive around the front windshield and rear window glass, and as a pre-process to this process, an adhesive primer is applied to the same area where the adhesive will be applied. A primer application step is provided.

This primer coating step is carried out using, for example, a coating device as shown in FIG. 3 (perspective view).

That is, in FIG. 3, reference numeral 1 indicates the main body of the primer coating machine, and a primer coating brush 2 is installed at the bottom of the main body 1.
The main body 1 to which is attached is attached to an operating arm 3a of a coating robot 3 via a shaft 1a, and the coating robot 3 is suspended from a fixed frame 4.

A conveyor 5 capable of conveying a window glass 6 as a workpiece is disposed below the coating robot 3, and a predetermined location (all around the circumference) 6a of the window glass 6 being conveyed to the conveyor 5 is moved by the operation of the coating robot 3. It is configured so that an adhesive primer can be applied.

It is important to ensure that the adhesive primer is applied before applying the adhesive when bonding the window glass to the car body. This inspection is carried out immediately after applying the adhesive primer, and conventionally this inspection has been carried out manually.

[Problem to be solved by the invention]

As mentioned above, in the past, the application state of adhesive primer was manually inspected, which resulted in problems such as inefficiency and high costs9. The aim is to solve these problems by automating (mechanizing) the adhesive primer coating machine. An object of the present invention is to provide an adhesive primer application detection device for automobile bonded window glass, which is equipped with a photoelectric sensor and can detect the application state of the adhesive primer from the output difference of a re-reflective photoelectric sensor. shall be.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides a primer coating detection device for an adhesive for automobile bonded window glass, in which the primer coating machine is connected to the main body of a primer coating machine for adhesive for automobile bonded window glass. The main body is equipped with a primer supply pipe and a primer application brush attached to the lower part of the main body, and a light receiving window facing the primer application surface is attached to the front and rear parts of the primer application brush, respectively. The device is characterized by being equipped with a pair of reflective photoelectric sensors and a controller capable of detecting the application state of the adhesive primer by measuring the difference in output between the pair of reflective photoelectric sensors.

[For production]

In the above-mentioned device for detecting the application of primer for adhesives on automobile window glass according to the present invention, the primer application detection device for adhesives on automobile window glass according to the present invention detects the application of the primer application by the pair of reflective photoelectric sensors provided respectively at the front and rear parts of the primer application brush. The reflected light from the window glass surface is received immediately before and after the adhesive primer is applied to the window glass surface by It is possible to detect whether the adhesive primer has been applied to the window glass surface.

〔Example〕

Hereinafter, a primer application detection device for an adhesive for automotive window glass as an embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is a schematic diagram of the main parts thereof, and Fig. 2 is a graph for explaining the operation. be. Note that the same reference numerals in FIG. 1 as in FIG. 3 indicate substantially the same members.

In the primer coating machine of this embodiment, as in the case of the conventional example, the main body 1 is attached to the operating arm (not shown) of the coating robot via the shaft 1a, and the lower part of the main body 1 is used for primer application. Brush 2 is installed.

Furthermore, the front and rear parts of the brush 2 in the main body 1 [
The "front" and "rear" refer to the mounting bracket in the direction in which the adhesive primer is applied on the top surface of the window glass 6 (the direction of the arrow 7). 8, a pair of reflective photoelectric sensors consisting of a first reflective photoelectric sensor 9 and a second reflective photoelectric sensor 10 are connected to each other with their respective light receiving ports facing the primer-coated surface of the window glass 6. The output of each reflective photoelectric sensor 9.10 is connected to a wire 11.12, respectively.
The information is configured to be transmitted to the controller 13 via.

Note that the reference numeral 14 in FIG. 1 indicates a primer supply pipe that supplies adhesive primer to the brush 2 from a tank (not shown).

In the above configuration, during the primer coating operation using the primer coating machine, reflected light from the window glass 6 surface that is about to be coated with adhesive primer by the brush 2 enters the first reflective photoelectric sensor 9; Each reflected light from the surface of the window glass 6 immediately after applying the adhesive primer with the brush 2 enters the second reflective photoelectric sensor 10 . Note that the light source for this purpose is not limited to the light source built into each reflective photoelectric sensor 9, 10, but may be light from indoor lighting.

Normally, the adhesive primer is a viscous black liquid, so immediately after it is applied to the 6 surfaces of the window glass with the brush 2, the light is scattered by the unevenness of the brush and the second reflective type primer is applied. The amount of light received by the photoelectric sensor 10 is smaller than the amount of light received by the first reflective photoelectric sensor.

Therefore, as shown in FIG. 2, a difference occurs between the outputs of both light chamber sensors 9 and 10. That is, in Figure 2,
A curve 9' represents the output of the first reflective photoelectric sensor 9, and a curve 10' represents the output of the second reflective photoelectric sensor 10. Then, the controller 13 determines whether this output difference is greater than or equal to a predetermined value, and as a result, the controller 13 determines whether or not the adhesive primer has been applied.
That is, when the controller 13 measures the output difference between the two light chamber sensors 9 and 10 and the value is above a certain value, the adhesive primer is properly applied to the window glass 6 surface. This means that it can be detected that the

Note that when the adhesive primer is not applied, theoretically there is no difference between the outputs of the two light chamber sensors 9 and 10. However, due to differences in characteristics specific to each photoelectric sensor, contact states of electrical contacts, etc., when the outputs of both optical chamber sensors are measured by the controller 13, some differences actually occur. However, since the value at that time is small, a signal is output from the controller 13 when the difference between the outputs of both light chamber sensors exceeds a predetermined value (threshold value) when primer application is not performed. By setting the determination circuit of the controller 13 in advance, it becomes possible to detect whether or not primer is applied based on the difference in output between the two light chamber sensors 9 and 10.

In this way, in this solid line example, a pair of reflective photoelectric sensors installed before and after the brush 2 are configured to measure the difference in the amount of light received before and after applying the primer, thereby detecting whether or not the primer is applied. Therefore, the coating state of the adhesive primer can be detected without being affected by changes in the light intensity of the light source, changes in the angle of the photoelectric sensor with respect to the window glass, or changes in the type of window glass. can.

The above explanation uses ordinary window glass as an example; however, in the case of window glass that has a ceramic coating applied to the periphery of the window glass, the reflection after primer application is higher than before application. The amount of light increases.

Therefore, in this case, curves 9' and 10 in FIG.
' are exchanged, but as in the case described above, a difference of more than a predetermined value occurs between the two when the primer coating is performed.

〔Effect of the invention〕

As described above in detail, the apparatus for detecting the application of a primer for an adhesive on automobile bonded window glass according to the present invention provides the following effects and advantages.

(1) A pair of reflective photoelectric sensors installed in the front and rear parts of the primer coating brush detect The reflected light from the window glass surface is received, and it is detected whether the adhesive primer has been applied to the window glass surface based on whether the difference between the two received light amounts is greater than a predetermined threshold value. can do.

(2) The presence or absence of primer application can be detected from the difference in the amount of light received by each reflective photoelectric sensor installed before and after the brush.
There is no risk of detection errors occurring due to changes in the amount of light from the light source, changes in the angle of the window glass with respect to each photoelectric sensor, or changes in the type of window glass.

[Brief explanation of drawings]

Fig. 1.2 shows a primer application detection device for adhesive for automotive window glass as an embodiment of the present invention, Fig. 1 is a schematic diagram of its main parts, and Fig. 2 is for explanation of operation. FIG. 3 is a perspective view of a conventional primer coating device. DESCRIPTION OF SYMBOLS 1...Main body of the primer coating machine, 2...Brush for primer coating, 3...Coating robot 4...Fixed frame body, 5...
... Conveyor, 6... Window glass, 8... Mounting bracket, 9... First reflective photoelectric sensor, 10...
Second reflective photoelectric sensor, 13...controller.

Claims (1)

[Claims] A primer applicator for adhesives for automotive window glass is equipped with a main body, a primer supply pipe connected to the main body, and a primer application brush attached to the bottom of the main body. A pair of reflective photoelectric sensors are attached to the front and rear parts of a primer application brush, respectively, and each has a light receiving window facing the primer coating surface.The output difference between the pair of reflective photoelectric sensors is measured and the adhesive is 1. A primer application detection device for an adhesive for automobile window glass, characterized in that the device is equipped with a controller capable of detecting the application state of the primer for use in automobile adhesive window glass.