JPS6222667B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for painting the underside of an automobile body.

Conventionally, anti-vibration paint has been applied to the underside of automobile bodies for the purpose of preventing rust and vibration. The method for applying anti-vibration paint to the underside of the car body is to place the car body on an article support suspended from a conveyance device, and move it above the automatic paint machine. Then, paint while avoiding the clamps, drain holes, bolt holes, etc. installed on the underside of the car body, or after the worker masks the clamps, drain holes, bolt holes, etc., use an automatic coating machine. A method of painting is being used.

However, in this floor coating method,
Since the car body is placed on the article support and is automatically painted by an automatic coating machine while being transferred, the vehicle placed on the article support may be affected by the vibration or impact of the conveyance device during transfer. If the position of the vehicle body has shifted, or if the mounting section on which the vehicle body is mounted has shifted due to deformation of the article support due to long-term use, etc., the relative position of the automatic painting machine and the vehicle body The relationship changes, and there is a drawback that the anti-vibration paint cannot be applied to the target area to be painted and oversprays onto the outer surface of the automobile body. In addition, if clamps, drain holes, bolt holes, etc. are not masked, there is a drawback that the parts are painted.

The present invention has been made to solve the above-mentioned drawbacks, and its purpose is to prevent relative positional deviation between the automobile body and the automatic coating device when painting the underside of the automobile body with the automatic coating device. To provide a method for painting the underside of an automobile body, which allows painting only the necessary parts.

An object of the present invention is to place an automobile body on an article support suspended from a conveyance device, transfer the speed of the vehicle body, and stop the vehicle above an automatic painting device. When painting the underside of an automobile body, the automobile body stopped above the automatic coating device is lifted from the article support by a position adjustment device, and the relative positional deviation between the automobile body and the automatic coating device is corrected. This is achieved by a method for painting the underside of an automobile body, which is characterized in that the underside of the automobile body is painted by an automatic painting device.

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

FIG. 1 shows a schematic side view of a painting booth for explaining the floor coating method of the present invention, and FIG.
1 shows a front view of the painting booth shown in the figure. 1st
In the figures and FIG. 2, reference numeral 1 denotes a coating booth for applying anti-vibration paint, and a conveying device 3 supported by a support member 2 is provided in the longitudinal direction of the upper center of the coating booth 1. There is. An article support 4 is suspended from the conveyance device 3, and the article support 4 is provided with a mounting section 4a for mounting a tire house Wc of an automobile body W, which is an object to be painted. There is. Also, floor 5 of painting booth 1
There is a painting robot in the center of the car body W.
An automatic coating device 6 such as a special coating machine made for coating Wa is provided. On both sides of this automatic painting device 6, the automobile body W mounted on the article supporter 4 and transferred is placed on the article supporter 4.
A position regulating device 7 is provided for correcting relative positional deviation between the automobile body W and the automatic painting device 6. This position adjustment device 7 is composed of four cylinders 8 operated by air or oil and two holding members 9 for receiving, for example, a rocker panel Wb of an automobile body W.

Each of the four cylinders 8 is provided upright on a fixing member 10 provided on the floor 5, and the two holding members 9 are attached to the automatic painting device 6.
The pistons 8a of the front and rear cylinders 8 disposed on both sides of the cylinder 8 are bridged and fixed to each other. Furthermore, the four cylinders 8 need to be raised in a balanced manner when lifting the automobile body W from the article support 4, and the pistons 8a of the cylinders 8 are raised in synchronization. The height at which the automobile body W is lifted from the article support 4 is
30mm to 50mm from the mounting portion 4a of the article support 4
is set in the range. Note that 11 is a supply pipe for air, etc. provided above and below the cylinder 8.

In the painting booth 1 configured as described above, the automobile body W, which is the object to be painted, is transported to the conveying device 3.
After the chemical conversion coating and the electrodeposition coating are formed, the article is transferred to the coating booth 1 where the anti-vibration coating is applied. The automobile body W transferred to the painting booth 1 is
When it comes above the automatic coating device 6, the conveying device 3 stops at that position. At the same time, position adjustment devices 7 provided on both sides of the automatic painting device 6
Supply pipe 1 provided below the cylinder 8 of
1 is supplied with air or the like, the holding member 9 rises together with the piston 8a, and holds, for example, a rocker panel Wb of the automobile body W mounted on the article support 4, and also holds the automobile body W on the article support 4. Float it within a range of 30mm to 50mm from part 4a. As a result, the automobile body W is reliably held by the holding member 9 of the position regulating device 7, and the relative position between the automobile body W and the automatic painting device 6 is regulated. In this state, the automatic painting device 6 located below the automobile body W is
The anti-vibration paint is moved from side to side and applied only to the required painting parts on the underside of the car body W, excluding the clamps, water drain holes, bolt holes, etc. provided on the underside Wa of the automobile body W. At the same time as the painting is completed, air or the like is supplied to the supply pipe 11 provided above the cylinder 8, and the holding member 9 is lowered together with the piston 8a. 4a, the conveying device 3 is activated, and the automobile body W is transferred to the next process.

As explained above, according to the floor coating method of the present invention, an automobile body stopped above an automatic coating device is lifted from an article support by a positioning device, and the automobile body and the automatic coating device are moved relative to each other. After the positional deviation is corrected, the underside of the car body is painted by the automatic painting device, so it is possible to prevent the relative positional deviation between the car body and the automatic painting device, and the underside of the car body is painted. This has the effect of allowing anti-vibration paint to be applied only to the necessary areas on the underside of the floor, excluding the clamps, water drain holes, bolt holes, etc. provided in the floor. Moreover, by preventing relative positional deviation between the automobile body and the automatic painting device, there is an effect that overspray on the outer panel surface other than the underfloor of the automobile body can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a coating booth for explaining the coating method of the present invention, and FIG. 2 is a schematic front view for explaining the coating method of the present invention. DESCRIPTION OF SYMBOLS 1... Painting booth, 3... Transport device, 4... Article support, 4a... Mounting section, 6... Automatic painting device, 7... Position regulating device, 8... Cylinder, 8
a... Piston, 9... Holding member, 11... Supply pipe.

Claims (1)

[Claims] 1. An automobile body is placed on an article support suspended from a conveyance device and transferred, and after stopping above an automatic painting device, the underside of the automobile body is coated with the automatic painting device at the stopping position. When painting,
After the automobile body stopped above the automatic painting device is lifted from the article support by the position regulating device and the relative positional deviation between the automobile body and the automatic painting device is corrected, the automobile body is fixed by the automatic painting device. A method for painting the underside of an automobile body, the method comprising painting the underside of a car body.