JPH10206342A - External flaw detecting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct a system by which an external flaw generated on a surface of a car body can be reliably and easily detected, for example, in an assembling process of an automobile. SOLUTION: After external appearance is inspected by performing painting on a surface of a car body W, a coloring film F on which an impact received place is colored when impact is received from outside, is stuck to an upper surface of the car body W in a film sticking station 2, and assembling work is performed in an assembling station 3. Afterwards, when assembling of the car body W is completed, coloring is inspected by a color CCD camera C in a coloring inspecting station 4, and an external flaw is detected. This data may be inputted to a computer P, and when its place is repaired, data of the computer P is corrected, and may be flowed to the flowing stage 5 while sticking the same coloring film F as it is. In this case, a color CCD camera is also arranged in the flowing stage 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trauma detection system capable of reliably detecting a trauma occurring on an outer surface of a vehicle body in, for example, an assembling process or a distribution stage of an automobile.

[0002]

2. Description of the Related Art Conventionally, in the process of assembling an automobile, when the surface of a vehicle body is painted, for example, the presence or absence of scratches is confirmed by visual inspection or the like, and then a film for protecting the outer surface is affixed from the surface. It is conveyed to the line and assembly work is performed. Then, when the assembly is completed, the film for protecting the outer surface is peeled off, and a final inspection for damage is performed. Such a damage inspection is usually performed visually.

In the case where there is no damage or repair is performed, the protective film is again adhered to the surface and distributed, for example, after transporting or after arriving at a store. Peeled off and visually checked for trauma.

[0004]

However, the conventional method of visually inspecting a trauma as in the prior art requires experience and time and is not efficient. In addition, due to the lack of certainty in the inspection of trauma, it was often impossible to clarify the stage at which the trauma occurred, the responsibility could not be clarified, and improvement was necessary from the viewpoint of preventing recurrence.

[0005] Therefore, there has been a demand for a means capable of reliably detecting the location of a wound in a short time and also capable of reliably knowing at which stage the damage has occurred.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a system which can easily and surely detect the occurrence of a trauma even if it is inexperienced, and can easily clarify at what stage the trauma was caused. The purpose of the construction. That is, claim 1
When a shock is applied from the outside, a film that causes the impacted part to develop a color is attached to the surface of the work, and after the work is handled in a predetermined manner, the color development part is inspected at a predetermined time by the color recognition means. did.

[0007] Here, a film that produces a color at the location where the impact is applied when an external impact is applied means, for example, a pressure-sensitive adhesive layer, a substrate film layer, and a color-forming layer laminated from the lower layer to the upper layer, and the color-forming layer includes microcapsules. When the microcapsules are destroyed by impact (external pressure), the ink reacts with the color developer to form a color, and the ink and the color developer are both dispersed in the binder. It is commercially available.

The color recognizing means may be, for example, a commercially available color CCD camera or the like, and the color recognizing means checks for the presence of color.

At this time, the work to be applied is
For example, the present invention can be applied to various modes such as assembling, processing, and transporting a work. Then, when these parts are handled, if an external impact is applied for some reason, the parts develop color, and if this is detected by the color identification means, the presence of external damage can be reliably detected.

Further, in the present invention, the present damage detection system is applied at the time of assembling a work on an assembly line, and the color-developed portion is inspected at the time of completion of the work assembly. Then, the occurrence of damage during the work of assembling the work is detected at the time of completion of the assembling.

According to a third aspect of the present invention, a color identification means is provided for each assembly process in the assembly line. Here, each of the assembling steps in the assembling line is, for example, assembling of an engine, assembling of a drive system, assembling of a suspension, assembling of interior parts, and the like. In addition, it is easy to find out the cause of the trauma, and it is effective in preventing recurrence.

According to a fourth aspect of the present invention, the color identification means is installed at a distribution destination of the product. Here, the distribution destination is
For example, a product transportation terminal, a store, etc., distributes the product with the film attached to the surface to the distribution destination, and inspects it with the color identification means of the distribution destination to determine at which stage the injury occurred. And, for example, clarify responsibilities.

According to a fifth aspect of the present invention, the data inspected by the color identification means is managed by the management means, and the data is corrected when the damage to the work is repaired, and the corrected data is managed consistently. I tried to go.

Such a managing means is, for example, a microcomputer, which manages data on the color-developed portions of the film and, when the film is colored, partially removes a portion of the film (a portion sufficient to expose the damaged portion). After the repair, the data of the management means is corrected (for example, a repaired portion), and the peeled film portion is re-attached and carried out together with the data.

[0015] Thereafter, even if the color identification means detects the coloring of the portion in another process or the like, it is not determined that there is an abnormality based on the repaired data. If such management is performed consistently, for example, from the manufacturing stage to the product distribution stage, it is possible to detect damage at all stages simply by pasting a single film, The labor and cost of pasting are reduced.

According to the sixth aspect of the present invention, a film having different colors depending on the degree of impact is used. In this case, for example, the breaking strength of the microcapsule is divided into a plurality of stages, and the color of the ink is made different for each stage, so that the color to be generated differs depending on the magnitude of the external impact. This makes it possible to determine the degree of the external injury from the outside and to perform the repair work more smoothly, and is effective in searching for the cause.

[0017]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is an explanatory diagram for explaining a basic configuration of the present system, and is an explanatory diagram of an example of inspecting an automobile for damage. FIG. 2 is a diagram for inputting data of an appearance inspection before attaching a color developing film to a management unit. FIG. 3 is an explanatory view showing a state in which color data of a film inspected by a color identification means is input to a management means, FIG. 4 is a cross-sectional view of a color developing film, and FIG. 5 is a view for explaining the principle of color development. FIG. 6 is an operation diagram of a conventional film.

The injury detection system of the present invention can surely detect an injury in an assembling operation of, for example, an assembly line of an automobile, even if the user is not an expert, and at what stage the injury occurred and what caused the injury. Although it is configured as an easy-to-find trauma detection system, this system is not limited to the manufacturing process, and can be easily extended to consistent trauma inspection up to the distribution stage as a wide product, and The benefits obtained by extending to such a consistent system are significant.

In the automobile assembly line, as shown in FIG. 1, when the coating is performed on the vehicle body W, the appearance inspection is performed at the appearance inspection station. Conventionally, this appearance inspection was mainly performed visually, but in the present system, as shown in FIG.
The entire surface is inspected, and the camera data is input to a server & computer as a management means, and a determination result is output.

The server & computer as the managing means is also adapted to receive data of a color CCD camera C as a color identifying means to be described later, and form a quality control network by connecting with a plurality of work terminals. I have.

When the appearance inspection is completed, as shown in FIG. 1, a coloring film F (not shown in FIG. 1) is wrapped on the surface of the vehicle body W at a film sticking station, and is stuck by blowing hot air. .

As shown in FIG. 4, for example, the coloring film F includes an adhesive layer Fb that adheres to the release liner Fa, a base film Fc as an intermediate layer, and a coloring layer Fd as an upper layer. As shown in FIG. 5A, the layer Fd includes a microcapsule-like ink i and a developer k in a binder b.
Are distributed.

Then, the peeling backing sheet Fa is peeled off from the coloring film F and is adhered to the surface of the vehicle body W. When an external pressure is applied from the outside, the microcapsule-like ink i is broken as shown in FIG. In this way, the ink and the developer k react with each other to form a color-forming portion x. The breaking strength of the microcapsule-like ink i is such that the microcapsule ink i can be surely broken by an impact load that may cause damage to the painted surface. still,
As such a coloring film F, a commercially available film can be used.

Incidentally, the conventional protective film G is, for example, as shown in FIG.
b, the base film Gc of the intermediate layer, and the back surface treatment layer Gd.
The back surface treatment layer Gd is peeled off.

After the color film F has been attached, as shown in FIG. 1, the components are assembled through a plurality of assembly steps in an assembly station. The plurality of assembling steps are, for example, a step of assembling an engine, a step of assembling wheels, a step of assembling interior parts, and the like. During this time, the coloring film F is still attached to the surface of the vehicle body W.

When the assembling is completed, the color development state is inspected at the color inspection station by the color CCD camera C as the color identification means. That is, as shown in FIG. 3, for example, when the upper surface and the left and right sides of the vehicle body W are imaged by a plurality of color CCD cameras C and the data is input to a computer as a management means, a determination result is output, and From the work terminal, the judgment result, the work instruction, the required repair location, and the like are printed out.

According to such a method, it is possible to reliably detect a trauma even if the experience is inexperienced, and to shorten the inspection time.

By the way, if the color CCD camera C and the terminal are installed for each part assembling process in the assembling station in addition to the above basic configuration, there is a further advantage in the point of investigating the cause and the like. .

That is, in this case, for example, the light emitting portion is detected at the final stage of each assembling process, and if it is determined that repair is necessary, only the light emitting portion of the light emitting film F is peeled off locally to perform repair. When the repair is completed, the peeled portion is re-attached, and the fact that the repair has been completed is input to the computer from a work terminal or the like, and the data is corrected. By doing so, in the subsequent inspection, the light emitting portion is not treated as a repair required portion, and only the other light emitting portions are determined as targets.

Further, such a system can be easily extended not only to a vehicle manufacturing process but also to a subsequent distribution stage as shown in FIG. 1, and a more useful system can be obtained. .

That is, after finishing the finished vehicle with the original light-emitting film F adhered, it is flown as it is at the distribution stage, and a color CCD camera C and a computer terminal are arranged at, for example, a transport terminal or a store. If a management network is established, it is possible to continue to use one color developing film F attached first, and to know at which point the trauma occurred, to investigate the cause,
It is effective in preventing recurrence. It is also effective in elucidating, for example, liability issues. If such a light emitting film F is recycled at the final stage, resources can be saved.

Note that the color of the color developing film F does not necessarily have to be a chromatic color, but may be a monochrome achromatic color, for example. Further, as the color forming film F, different colors can be formed depending on the degree of impact. In this case, for example, the breaking strength of the microcapsules is divided into about three stages to make the color of the ink different, so that the degree of the damage can be determined finely, thereby facilitating the search for the cause.

[0033]

As described above, in the wound detection system of the present invention, after a film is applied to the surface of a work where an impact is generated when an external shock is applied, the work is handled in a predetermined manner. Since the color spot is inspected by the color recognition means at a predetermined time, it is possible to reliably and easily detect an external injury without any experience. If such a system is applied to a work assembly line, it is possible to reliably detect damage during assembly, and if color identification means is installed for each assembly process in the assembly line, the cause of damage, etc. It is easy to search and is effective in preventing recurrence.

If the color identification means is also installed at the distribution destination of the product, it is possible to determine at which stage the injury has occurred, and to clarify the responsibility, for example. Further, if the data inspected by the color identification means is managed by the management means while being corrected, the same film can be used for distribution, and the labor and cost of attaching the film each time can be reduced. In addition, if a film that develops different colors depending on the degree of impact is used, the degree of trauma can be determined, and the search for the cause can be made more effective.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram for explaining a basic configuration of the present system, and is an explanatory diagram of an example of inspecting an automobile for damage;

FIG. 2 is an explanatory diagram of a state in which data of an appearance inspection before a color developing film is pasted is input to a management unit.

FIG. 3 is an explanatory diagram of a state in which color development data of a film inspected by a color identification unit is input to a management unit;

FIG. 4 is a cross-sectional view of a coloring film.

FIG. 5 is an operation diagram for explaining the principle of coloring.

FIG. 6 is an explanatory view of a conventional film.

[Explanation of symbols]

F: color film, P: computer, W: body, ...
Film pasting station,… Assembly station,
… Color inspection station,… distribution stage.

Claims (6)

[Claims] 1. A step of attaching a film on which an impact is applied to the surface of a workpiece when an impact is applied from outside to a surface of the workpiece, and after handling the workpiece in a predetermined manner, color is generated by a color recognition means at a predetermined time. A trauma detection system comprising: an inspection step of inspecting a portion. 2. The damage detection system according to claim 1, wherein the work is handled by assembling the work on an assembly line, and the color-developed portion is inspected at the time when the work is completed. Trauma detection system. 3. The wound detection system according to claim 2, wherein said color identification means is provided for each assembly step in said assembly line. 4. The wound detection system according to claim 1, wherein the color identification means is installed at a distribution destination of the product. 5. The damage detection system according to claim 1, wherein the data inspected by said color identification means is managed by management means, and the time when the damage of the work is repaired. Wherein the data is corrected and the corrected data is managed consistently. 6. The wound detection system according to claim 1, wherein the film has a different color depending on the degree of impact.