JPH0375502A - Detecting apparatus for edge of laminate - Google Patents

Abstract

PURPOSE:To make it possible to ensure the detection of the edge of a laminate by providing an image processing device for operating the edge of the laminate based on the change in output of a sensor. CONSTITUTION:A laminate 1 is formed by overlapping two glass plates as transparent plates 2 and 2' through a light transmitting opaque film such as an autoclave 3. An edge detecting apparatus 4 is constituted of a light source 5 such as a tungsten electric lamp containing halogen, a convex lens 6 and a light receiving sensor 7 as a unitary body. The apparatus 4 is composed of an ITV camera and an image processing device 8 furthermore. When the light in the specified direction is projected on the edge part of the laminate 1 from the light source 5, a shade S1 is formed on the seaming part of the transparent plate 2, and an image S2 is projected on the opaque film 3. A shade S' is formed on the seaming part of the transparent plate 2. The images of S2 and S' are formed on a sensor 7 through the convex lens 6. The outputs M and M' of the sensor 7 are operated in the device 8, and the edge is detected.

Description

[Detailed Description of the Invention] [Industrial Application Field] Laminated glass in which a transparent plate and an opaque film are overlapped, such as a laminated glass in which two glass plates of the present invention are laminated with an opaque intermediate film interposed therebetween before autoclave treatment. The present invention relates to a body edge detection device.

[Conventional technology]

Accurately detecting the edges of laminated glass, in which two sheets of glass are laminated with an interlayer film such as polyvinyl butyral interposed between them, is possible by automatically detecting the protruding interlayer film using a tuffing roll, etc., before preliminary gluing. Even when cutting an appropriate amount, the cutting was done without detecting the edge by positioning, so there was no suitable method.

For example, Utility Model Application Publication No. 54-44588 discloses that the transmitted light changes rapidly at the edge of the glass for the purpose of detecting defects such as scratches by irradiating a laser light source onto a plate glass and using the transmitted light. has been done. Furthermore, there is a device, filed by the present applicant in Japanese Patent Application No. 10837/1983, which irradiates a seaming portion of a glass edge with a laser beam and detects the edge based on the reflected light.

[Problem that the invention seeks to solve]

However, both of these devices detect the edge of a single glass plate, and even when applied to the object of the present invention, that is, a laminate in which a transparent plate and a translucent opaque film are stacked, in the former case, the opaque portion is detected. The transmitted light is diffused and cannot be measured, and in the latter case, it is possible to detect the edge of the plate glass on the light source side, but it is impossible to detect the edge of the plate glass on the side opposite the light source because there is an intervening film. .

The present invention has been made in view of these points, and it is possible to secure the edges of a laminate in which a transparent plate such as plate glass and a translucent opaque film such as a polyvinyl butyral film are laminated together before being laminated. The purpose is to provide a device that can detect

[Means for solving problems]

The present invention provides an edge detection device for a laminate in which a transparent plate and a translucent opaque film are stacked, including a light source that irradiates the edge of the laminate with light in a certain direction, and a sensor that receives the light that has passed through the edge. and a convex lens provided between the sensor and the edge to form an image formed on the opaque film on the sensor, and an image processing device that calculates the edge of the laminate based on changes in the output of the sensor. do.

[Effect]

As shown in FIG. 1, when the edge portion of the laminate is irradiated with light in a certain direction, a shadow S1 is generated at the seaming portion of the transparent plate on the light source side, and is projected as an image S2 on the opaque film. In addition, since the transparent plate on the side opposite to the light source has a translucent opaque film, the light is attenuated, but a shadow S'' is produced at the seaming part. It was discovered that the edge of the body can be detected by interposing a convex lens between the light receiving sensor and placing it at a position where images S2 and S'' are formed on the light receiving sensor. The point where the output suddenly decreases is detected as the edge of the laminate, and it is possible to detect not only the edge of the transparent plate on the side of the light source but also the edge of the transparent plate on the side opposite to the light source.

Note that it is preferable if the transparent plate is seamed so that the shadow becomes clear, but even if the transparent plate is not seamed, if the light in a certain direction is irradiated on the end face at an angle rather than parallel, the shadow on the end face will be can be detected in the same way.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration and an output of a light receiving sensor showing a preferred embodiment of the present invention.

The upper part is a laminate in which two approximately rectangular plate glasses serving as transparent plates 2.2" are laminated with a translucent opaque film 3 called an interlayer film made of polyvinyl butyral or the like before being autoclaved. be.

The edge detection device has a light source 5 such as a halogen-containing tungsten light bulb, a convex lens 6, and a light receiving sensor 7, and is equipped with a hood (not shown) having a 101iφ hole at the tip for the purpose of blocking external light. It is composed of an ITV camera and an image processing device 8, and the distance to the stacked body is 1.0 to 2 m for the light source 5, and 10C11 for the ITV camera.
Before and after.

Furthermore, if the amount of protrusion of the translucent opaque film 3 is large and it hangs down vertically, it may be difficult to detect edges, so an air source that blows air from below onto the protruding portion may be added as necessary.

Next, the operation will be explained.

In the step before preliminary adhesion using tacking rolls, the laminated glass is positioned by a positioning device (not shown) and arranged as shown in FIG. Light+! 15 lights up, and when the ITV camera is focused on the translucent opaque film, the transparent plates 2 and 2 degrees
The edges are respectively shown as minimum parts M and M'' at two locations of the output of the light receiving sensor, and these outputs are calculated by the image processing device 8 to detect the edges.

As is clear from this result, since the present invention can simultaneously detect the edges of two transparent plates, it is also possible to calculate plate displacement. If the sheet deviation exceeds the allowable range, the sheet is not sent to the next process and is treated as a defective item. When this plate misalignment is within the allowable range, multiple edges are detected by using another edge detection device, and a roughly quadrilateral laminated glass outline is calculated from the results. The protruding interlayer film is removed by the robot. It is automatically cut by a cutting blade driven by a machine. At this time, since the edge of the laminated glass is calculated accurately, the cutting blade and the laminated glass edge do not come into contact and damage to the edge or the cutting blade occurs.

After that, preliminary adhesion is performed using a tacking roll, and main adhesion is performed using an autoclave, so that the interlayer film becomes transparent and a laminated glass is obtained.

Although the present invention has been described above using preferred embodiments, it is not limited thereto, and various applications are possible.

Regarding the laminate, in addition to the combination of plate glass and polyvinyl butyral, various transparent resin plates such as polycarbonate can be used as the transparent plate, and ethylene-vinyl acetate polymer can be used as the translucent opaque film. In addition to the three-layer structure of the embodiment, a two-layer structure or a multilayer structure thereof may also be used.

As for the light source, in addition to various light bulbs, laser light sources can be used. At least 1 if using a light bulb
The light source may be separated by m or more so that it can be regarded as a point light source, or a convex lens may be interposed so that the distance from the light source becomes the focal length, and the laminate may be irradiated with parallel light.

In addition, as a combination of a convex lens and a light receiving sensor, IT
In addition to the V-camera, an image sensor may also be used.

〔Effect of the invention〕

The edge detection device of the present invention uses a general-purpose light bulb as a light source and a general-purpose light receiving sensor, and does not require a precise drive device, so it is inexpensive and simple. It is possible to accurately detect the edges of a laminate made of superimposed opaque films.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a schematic configuration and an output of a light receiving sensor showing a preferred embodiment of the present invention. Soil - Laminate 3 - Transparent opaque film 5 - Light source 7 - Light receiving sensor 2.2° - Transparent plate knee edge detection device 6 - Convex lens 8 - Image processing device Fig. 1

Claims (1)

[Claims] An edge detection device for a laminate in which a transparent plate and a translucent opaque film are laminated includes a light source that irradiates an edge of the laminate with light in a certain direction, a sensor that receives light transmitted through the edge, and a sensor. A laminate comprising: a convex lens provided between the edges to form an image formed on the opaque film on a sensor; and an image processing device that calculates the laminate edge based on a change in the output of the sensor. Edge detection device.