JPH05203531A - Water-leakage inspecting method for automobile body - Google Patents

Abstract

PURPOSE:To make it possible to inspect water leakage positively before intermediate coating and top coating by inspecting the water leakage of a body using a water jetting device, which is moved along the body, after the application and drying of sealing material. CONSTITUTION:A water-leakage inspecting step is arranged after the application and drying step of sealing material in a painting step. When a carrier truck C, on which a body B is mounted, enters in the water-leakage step, a truck chuck cylinder 4 is engaged with a part of the truck C by the operation of a linear motor, hydraulic cylinder and the like. A water-leakage inspecting device follows the truck C and advances. At this time, a pump 6 is operated, and water is jetted from a jetting nozzle 5 on the surrounding parts of a wheel house H for front and rear wheels. An inspecting person stands on a stage on rails R and visually inspects the water leakage into the inside of the body. When the jetting is finished, the cylinder 4 is contracted and disengaged from the truck C. Then, the inspecting device drives a motor 3, and the position of the starting state is restored. At the same time when the next truck arrives, the inspection is started again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile body water leak inspection method. More specifically, the present invention relates to a water leak inspection method for inspecting water intrusion into the interior of an automobile body.

[0002]

2. Description of the Related Art In the process of painting an automobile body, when a sealing material containing vinyl chloride resin as a main component is insufficiently applied, it is not possible to completely fill a gap in a portion where the body is misaligned. However, there is an inconvenience that water enters the room while traveling in the rain. Therefore, as shown in FIG. 4, conventionally, a water leakage inspection step is provided in the completion inspection step, and water is injected to the body by a shower tester to inspect the water leakage inside the body.

[0003]

However, since the water leakage inspection is performed in the completion inspection process, if a water leakage defect is found, the defective body is moved to the correction process after the inspection process is completed. Therefore, in order to make corrections, parts such as tires have to be removed and a sealing material has to be applied to the water leakage portion, which requires a great deal of man-hours. In addition, the color of the sealing material is different from the color of the outer panel when the inside of the wheel house is used, and thus it may be necessary to repaint the top coat.

Further, when a water leak inspection is performed in the completion inspection process, since tires are mounted, it is difficult for water to hit the inside of the wheel house, and defective seams in the wheel house are difficult to find with conventional equipment. was there.

In view of the above problems, it is an object of the present invention to provide a highly accurate water leakage inspection method which requires less man-hours for correcting water leakage defects.

[0006]

According to the water leakage inspection method of the present invention, a water leakage inspection step is provided after the coating and drying step of the sealing material in the body coating line, and the body is moved following the body conveyed in the step. The present invention is characterized in that water is inspected by injecting water to a water leakage inspection point of a body using a water injection device.

[0007]

The water leakage inspection method of the present invention follows the body conveyed by the water leakage inspection device having a water injection function to perform the water leakage inspection after applying and drying the sealing material in the painting process. By injecting water to the water leakage inspection point while moving the water, and inspecting the water leakage inside the body, it is possible to reliably inspect the water leakage defect before the intermediate coating or the top coating, and the number of correction steps can be reduced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a water leak inspection method of the present invention will be described with reference to the drawings.

FIG. 1 is a process diagram showing an embodiment of the water leakage inspection method of the present invention, FIG. 2 is a schematic perspective view showing an embodiment of the water leakage inspection method of the present invention, and FIG. 3 is a front view of FIG. Is.

As shown in FIG. 1, the method for inspecting water leakage according to the present invention comprises inspecting water leakage after a step of applying and drying a sealing material such as a vinylplastisol type body sealer containing vinyl chloride resin as a main component. It is characterized by having a process. Therefore, when a water leakage defect is found in the water leakage inspection process, a sealing material can be applied to the water leakage location and baked in a water sharpening and drying furnace to easily correct it. Then, the body that has passed the water leakage inspection again and passed is advanced to the subsequent water polishing step, intermediate coating step and top coating step, so that the corrected portion is covered by the first coating, and re-coating is not required.

Further, since the inspection is carried out before the assembling process with the tires not attached, it is possible to surely detect the water leakage defect in the wheel house.

As shown in FIGS. 2 and 3, the water leakage inspection device follows the conveyance carriage C on rails R laid on both sides of the track of the conveyance carriage C on which the body B is mounted. Then, the water leakage inspection is performed by injecting water around the water leakage inspection portion, for example, the periphery of the wheel house H while moving.

The water leakage inspection apparatus comprises a carriage 1, a motor 3 for driving at least one wheel 2 of the carriage 1 to move the carriage 1 backward, and a carriage for moving the carriage 1 to follow the carriage C. It is composed of a trolley chuck cylinder 4 as an expandable and contractible locking part for locking part of C, and a water injection device having a water injection nozzle 5 and a pump 6 for pumping water to the injection nozzle 5. There is. As shown in FIG. 2, the injection nozzle 5 is branched from the middle of the conduit and has a plurality of injection ports 7 in the lower portion of the front and rear wheel house H.

The pump 6 is preferably provided with a chamber 8 for injecting priming water thereto. Water is supplied to the water leak inspection device from a tank 9 provided outside through a hose 10 and once stored in the chamber 8. Then, water is successively poured into the pump 6 so that the pump 6 is always filled with water. Is supplied as is.

Next, a water leakage inspection method using the water leakage inspection apparatus will be described.

When performing a water leakage inspection, the water leakage inspection step is arranged after the step of applying and drying the sealing material containing vinyl chloride resin as a main component in the coating step as shown in FIG. With such a process arrangement, the water leak is inspected by injecting water around the wheel house H without the tires attached, so that the water leak defect can be detected more reliably, and the defective water leak position can be detected. If found and corrected, the correction is performed before the intermediate coating and top coating steps, which reduces the number of correction steps and eliminates the need for recoating, which is preferable.

As shown in FIG. 2, when the carriage C carrying the body B enters the water leakage inspection process, the carriage chuck cylinder 4 first operates the linear drive means such as a linear motor or a hydraulic cylinder to operate the carriage chuck C. Cylinder 4 is a carriage C
To the orbit of. As a result, the cylinder 4 is locked to a part of the transport carriage C, and the water leakage inspection device follows the transport carriage C and moves forward. While advancing forward, the water leak inspection device operates the pump 6 to inject water from the injection nozzle 5 to the vicinity of the wheel house H of the front and rear wheels. The injection is performed for a fixed time, for example, about 20 seconds at a line speed of 4.5 m / min. An inspector visually stands for water leakage inside the body while standing on a pedestal S provided on the rail R of the water leakage inspection device during water injection. When the injection is completed, the carriage chuck cylinder 4 is contracted and the engagement with the carriage C is released. After that, the water leak inspection device drives the motor 3 to perform autonomous traveling, returns to the position in the initial state, and ends a series of operations. Water in pump 6 is in chamber 8
Since it is sequentially supplied from now on and is always filled, water can be injected without a time lag as soon as the next carrier C arrives.

In the above, in order to lock the carriage chuck cylinder 4 to the carriage C, for example, the fact that the carriage C has reached a predetermined position is detected by a limit switch or a proximity sensor, and the cylinder 4 of the cylinder 4 is thereby detected. The drive means may be activated. The operation of the pump 6 may be performed in the same way.

For stopping the operation of the pump 6 and releasing the lock of the truck chuck cylinder 4, for example, a rotary encoder is provided coaxially with the drive shaft of the motor to accurately measure the position of the carriage C, and a controller unit, etc. It is possible to control the stopping of the operation of the pump and the release of the lock of the truck chuck cylinder at a predetermined position using the control means.

In this embodiment, the front and rear wheel house H is used.
Although the water leak inspection of the surrounding area has been described, it is possible to easily select an arbitrary water leak inspection point on the body B by appropriately setting the height of the injection nozzle and the injection angle. Further, in the above-described embodiment, an example in which the carriage chuck cylinder 4 is linearly driven is shown, but a locking portion having a structure in which a swingable rod is fixed by an electromagnetic lock may be used, and locking and releasing are automatically performed. Any structure will do. Further, if the jet nozzle 5 is made movable and the jet nozzle 5 is extended only at the time of jetting to bring the jet nozzle 5 close to the inspection spot and then jetting, water can be more reliably applied to the inspection spot.

[0021]

According to the present invention, the water leakage inspection step is provided before the intermediate coating step and the top coating step in the coating step.
Since it is possible to find and correct a defective water leakage position before intermediate coating and top coating, it is possible to reduce the number of repair steps. Further, since the water leakage inspection device injects water while moving following the body, it is possible to detect the water leakage defect more reliably.

[Brief description of drawings]

FIG. 1 is a process diagram of a water leakage inspection method of the present invention.

FIG. 2 is a schematic perspective view showing an embodiment of the water leakage inspection method of the present invention.

FIG. 3 is a front view of FIG.

FIG. 4 is a process diagram of a conventional water leakage inspection method.

[Explanation of symbols]

 1 dolly 2 wheels 3 motor 4 dolly chuck cylinder 5 injection nozzle 6 pump 7 injection port 8 chamber 9 tank 10 hose B body C transport dolly R rail H wheelhouse S frame

Claims (1)

[Claims] 1. A method for inspecting water leakage of an automobile body, wherein a water leakage inspection step is provided after a coating / drying step of a sealing material in a body coating line, and water is moved following the body conveyed in the step. A water leak inspection method for an automobile body, which comprises inspecting a water leak by injecting water to a water leak inspection point of a body using an injection device.