JPH04246196A - Surface treatment of car body and its supporting device - Google Patents

Abstract

PURPOSE:To easily and rapidly dip the car main body and floor member in a surface-treating soln. tank in a coating part using a support and to easily surface-treat the car body without complicating the work. CONSTITUTION:The car body provided with a car main body 1 and a floor member 2 to be fixed to the lower surface of the main body is surface-treated. In this case, the main body 1 and the floor member 2 separated from the main body are held by a conveying means consisting of a hanger conveyor 3, etc., simultaneously conveyed to a surface-treating stage 11 and dipped in the same surface-treating soln. tank.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface treatment method for a vehicle body comprising a body body and a floor member attached to the lower surface of the body body, and a support device therefor.

0002

[Prior Art] Conventionally, for example, Japanese Patent Application Laid-Open No. 61-163297
As shown in the publication, in a painting department installed on a car body assembly line, a car body, in which a floor member is integrally joined to the lower surface of the body body, is coated with electrocoating paint, etc. using a conveyor such as a hanger conveyor. After the vehicle body is transported and immersed in a solution tank and subjected to surface treatment by forming an electrocoated film on the surface of the vehicle body, an intermediate coat and a top coat are sprayed on top of the surface treatment. It is being said.

0003

[Problem to be Solved by the Invention] As described above, in the painting section of an assembly line, a car body, in which a floor member is integrally joined to the lower surface of the body body, is immersed in a solution bath for electrocoating to perform surface treatment. In the case where the lower surface of the body is covered by the floor member, a large buoyant force acts when the car body is immersed, and it takes a considerable amount of time to immerse the entire car body. There is a problem in that a large pushing force is required to quickly immerse the vehicle body in the solution tank.

[0004]Furthermore, after the body main body and the floor member are molded in the molding process, the body main body and the floor member are separately molded until the outfitting for assembling the seat, suspension, etc. to the vehicle body is completed in the unit assembly process. It is conceivable that the time required to immerse the vehicle body in the solution tank could be shortened by configuring the vehicle body to be transported and immersed in the solution tank individually.
In this case, it is necessary to separately transport the body main body and the floor member to the painting section and perform the surface treatment, which poses a problem that the surface treatment work becomes complicated.

The present invention was made in order to solve the above problem, and without complicating the surface treatment work,
It is an object of the present invention to provide a method for surface treatment of a vehicle body and a supporting device therefor, in which a body main body and a floor member can be easily and quickly immersed in a solution tank for surface treatment in a painting section.

[0006]

[Means for solving the problem] The invention according to claim 1 is:
In a surface treatment method for a vehicle body, which performs surface treatment on a vehicle body comprising a body body and a floor member attached to the lower surface of the body body, the body body and the floor member are held in a separated state by a conveying means during the surface treatment step. After being conveyed at the same time, the body main body and the floor member are immersed in the same solution bath for surface treatment.

The invention according to claim 2 is a vehicle body support device used in a vehicle body surface treatment method for surface-treating a vehicle body comprising a body body and a floor member attached to the lower surface of the body body. The hanger conveyor includes a body holding section that holds the body, and a floor holding section that holds the floor member apart from the body main body.

According to a third aspect of the invention, in the first aspect, the floor member is conveyed to the surface treatment step in an upside-down state.

According to a fourth aspect of the present invention, in the first aspect, the body main body is conveyed to the surface treatment step in an upside-down state.

0010

[Operation] According to the invention as set forth in claim 1, the body main body is transported to the surface treatment process by a common transport means;
The surface treatment is performed by immersing the floor member and the floor member in a separate state in the same solution tank for surface treatment.

According to the second aspect of the invention, the body body is held by the body holding portion of the hanger conveyor, and the floor member is held by the floor holding portion of the hanger conveyor, so that the body body and the floor member are held by the floor holding portion of the hanger conveyor. The floor member and the floor member are simultaneously conveyed to the surface treatment process in a separated state and are subjected to surface treatment.

[0012] According to the third aspect of the invention, the floor member is immersed in a solution bath for surface treatment with the upper surface thereof being held downward.

According to the fourth aspect of the present invention, the floor panel constituting the body main body is immersed in a solution bath for surface treatment while the upper surface thereof is held downward.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show an embodiment of a vehicle body support device used in the vehicle body surface treatment method according to the present invention. This vehicle body support device is comprised of a hanger conveyor 3 that transports a body body 1 consisting of a roof panel, side panels, side sills, etc., and a floor member 2 attached to the lower surface of the body body 1 in a suspended state. The hanger conveyor 3 includes a body holding section 6 having a support member 4 made of a support bar or the like that supports the side portion of the body body 1, and a fixing member 5 that fixes the body body 1 onto the support member 4. It is provided. Further, below the support member 4 for the body main body 1, there is a support member 7 made of a support bar etc. that supports the side part of the floor member 2, and this support member 7.
A floor holding part 9 having a fixing member 8 for fixing the floor member 2 thereon is disposed.

[0015]The body holder 6 of the hanger conveyor 3 holds the body 1, and the floor holder 9 holds the floor member 2, thereby vertically separating the body 1 and the floor member 2. The body body 1 and the floor member 2 are conveyed in this state to a surface treatment process on a vehicle body assembly line, and the body body 1 and the floor member 2 are subjected to surface treatment, respectively. That is, in the surface treatment step, both the body body 1 and the floor member 2 are immersed in a chemical conversion bath containing a zinc phosphate solution or the like to form a zinc phosphate film or the like on their surfaces. This improves the adhesion of the paint to the surface of the vehicle body. Thereafter, the body main body 1 and the floor member 2 are immersed in a solution tank for undercoating containing a paint for electrodeposition to form an electrodeposition paint film on the surface, thereby forming a rust-preventing coating. Apply a primer coat.

When the surface treatment consisting of the above-mentioned chemical conversion treatment and electrodeposition coating in the above-mentioned surface treatment step is completed, the floor member 2 is taken out from the hanger conveyor 3 and transferred to a conveyance means exclusively for floor members (not shown). As shown in FIG. 3, the floor member 2 is transported from the surface treatment process 11 to the floor work process 12 by a dedicated transport means. In this floor work step 12, a sealer, a hole cover, a melt sheet material, etc. are set on the floor member 2, and an undercoat material is sprayed on the lower surface of the floor member 2, and then the floor member 2 is carried into a drying oven. By heating the melt sheet material and the undercoat material, operations such as drying the melt sheet material and the undercoat material are performed.

On the other hand, the body main body 1 is conveyed to a top coating step 13 by a hanger conveyor 3, and its surface is coated with an intermediate coat and a top coat, and is also subjected to sealer treatment, undercoat treatment, etc. as necessary. After that, it is transported to a unit assembly process 14, and in this unit assembly process 14, it is integrally joined to the floor member 2 after being equipped with a predetermined outfit.

As mentioned above, the body main body 1 and the floor member 2 are transported by the common conveyance means consisting of the hanger conveyor 3.
The structure is such that the lower surface of the body main body 1 is held at a distance from the floor member and both members are conveyed to the surface treatment step 11 and subjected to surface treatment with the lower surface of the body main body 1 left open. Unlike the conventional method of immersing the car body covered in a surface treatment solution bath in a solution bath for surface treatment, large buoyancy does not act, and both parts are immersed in the solution bath for chemical conversion treatment and the solution bath for electrodeposition coating with a light force. Surface treatment consisting of the above-mentioned chemical conversion treatment and electrodeposition coating can be properly performed by quickly immersing the material in a solution bath. Further, when the body main body 1 and the floor member 2 are taken out from the chemical conversion treatment solution tank and the electrodeposition coating solution tank, it is possible to reduce the amount of solution retained within the vehicle body and taken out to the outside. .

Furthermore, since the body main body 1 and the floor member 2 are each immersed in the same solution tank and subjected to the chemical conversion treatment and electrodeposition coating as described above, it is possible to In comparison, the structure of the surface treatment apparatus can be simplified and the surface treatment work can be facilitated.

Further, in the above embodiment, after the surface treatment step 11 is completed, the floor member 2 is taken out from the hanger conveyor 3 and transferred to a dedicated conveyance means, thereby separating the body main body 1 and the floor member 2. Since they are each transported to the next process separately, hole covers can be attached to the punch holes formed in the floor member 2 in the floor work process 12, and the floor member 2 can be constructed without being obstructed by the body main body 1. Works such as applying a sealer to the joints of panel materials and setting melt sheet materials on the upper surface of the floor member 2 can be easily performed.

In the above embodiment, the body main body 1 and the floor member 2 are held by the hanger conveyor 3 in an upright state, that is, with their upper surfaces facing upward. For example, as shown in FIGS. 4 and 5, a floor member 2 having a recess 21 for storing a tire may be held in an inverted state by holding one or both of them upside down.
a may be held by the floor holding part 9 of the hanger conveyor 3 in an upside-down state. In this case, since the tire storage recess 21 opens downward, the floor member 2a is immersed in a solution tank for surface treatment, and then the floor member 2a is led out from the solution tank. When doing so, there is an advantage that the solution can be prevented from being retained in the recess 21 and the amount of solution taken out can be reduced.

As shown in FIGS. 6 and 7, there is also a body holder 23 that rotatably supports the body 1 around the horizontal axis 22, and a floor holder disposed above the body holder 23. a hanger conveyor 3a having a section 24;
It is also possible to carry the body 1 in a state where it is held upside down. That is,
Both front and rear ends of the body main body 1 carried in in an erect state by a body carrying means (not shown) are held by the body holding part 23, and the floor member 2 is held by the floor holding part 24 above the body holding part 23, and then the above-mentioned horizontal By rotating the main body 1 around the shaft 22 and fixing the roof panel in a lower position, the main body 1 is conveyed in an upside-down state. In this way, when the body main body 1 is turned upside down and immersed in the solution tank for electrocoating with the roof panel positioned below, the electrodes are placed at the bottom of the solution tank. Since the roof panel can be placed close to the electrode, the electrodeposited paint can be effectively applied to the top surface of the roof panel, where it is desirable to have a thicker electrodeposition coating film than the bottom. There are advantages.

When the main body 1 is configured to be rotatably supported by the hanger conveyor 3a as described above, by rotating the main body 1 while being immersed in the solution tank, the main body 1 and the main body 1 are rotated. By releasing the air introduced into the solution tank from the body 1 and discharging it to the outside, by stopping the rotation of the body 1 and locking it in that state when the amount of solution taken out is the smallest, There are advantages such as the ability to reduce the amount of solution led out to the outside together with the main body 1. Also,
The body main body 1 is conveyed to the above-mentioned top coating process 13 by the above-mentioned hanger conveyor 3a, and after spray painting the top coat on the surface of the body main body 1, the top coat is cured while rotating the body main body 1 around the horizontal axis 22. By configuring it so that the paint sag can be applied, the thickness of the top coat can be increased and the coated surface can be finished in a mirror-like finish without causing paint sagging.

[0024]In addition, in a hanger conveyor 3a or the like configured to hold the floor member 2 on the floor holding part 24 disposed above the holding position of the body main body 1, the floor holding part 24 is configured. The support member 25 is swingably supported using a support shaft 26 provided at the upper end of the support member 25 as a fulcrum, and as shown by the imaginary line in FIG.
It is desirable to configure the floor member 2 so that it can be easily carried into the floor holding section 24 by opening the support member 25 to the left and right.

[0025]

As explained above, in the present invention, the body main body and the floor member constituting the vehicle body are transported to the surface treatment process at the same time in a separated state using a conveying means consisting of a hanger conveyor, and are immersed in the same solution bath. Because I decided to do so,
The body main body and the floor member can be quickly immersed into the solution bath without requiring a large pushing force, and the surface treatment work is easier than when the two components are immersed in separate solution baths. There are advantages such as simplification.

[0026] When the floor member is configured to be held upside down by the conveying means, the solution in the solution tank is held in the recess for storing tires formed in the floor member and is not released to the outside. It can prevent it from being taken out. In addition, if the body is configured to be held upside down by the conveying means and transported into the electrocoating solution tank, the electrocoating paint can be effectively applied to the top surface of the roof panel of the body body. It has the advantage that it can be attached.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a vehicle body support device according to the present invention.

FIG. 2 is a front view of the support device.

FIG. 3 is a process diagram showing an embodiment of the method for surface treatment of a vehicle body according to the present invention.

FIG. 4 is a side view showing a second embodiment of the support device.

FIG. 5 is a front view of the support device shown in FIG. 4;

FIG. 6 is a side view showing a third embodiment of the support device.

FIG. 7 is a front view of the support device shown in FIG. 6;

[Explanation of symbols]

1　Body itself 2 Floor components 3 Hanger conveyor (transportation means) 4,23 Body holding part 6, 24 Floor holding part 11 Surface treatment process

Claims (4)

[Claims] 1. A method for surface treatment of a vehicle body, which performs surface treatment on a vehicle body comprising a body body and a floor member attached to the lower surface of the body body, the body body and the floor member being held apart by a conveying means. A method for surface treatment of a vehicle body, characterized in that the body main body and the floor member are immersed in the same solution tank for surface treatment after being conveyed simultaneously to a surface treatment step. [Claim 2] A vehicle body support device for use in a vehicle body surface treatment method for applying surface treatment to a vehicle body comprising a body body and a floor member attached to the lower surface of the body body, the body holding portion holding the body body. A vehicle body support device comprising: a hanger conveyor comprising: and a floor holding portion that holds the floor member in a spaced state from the body main body. 3. The method for surface treatment of a vehicle body according to claim 1, wherein the floor member is transported to the surface treatment step in an upside-down state. 4. The method for surface treatment of a vehicle body according to claim 1, wherein the body main body is transported to the surface treatment step in an upside-down state.