JP2001232278A - Method for immersing automobile body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To immerse an automobile body W in a treating liquid in a short time without enlarging a treating vessel 1 in a method for immersing the automobile body W in the treating liquid in the treating vessel 1 by using a device comprising a support frame 2 hanging by ropes 41, 42 both ends of the automobile longitudinal direction of a fixture 3 supporting the automobile body W. SOLUTION: In a state in which one end of the fixture 3 is stopped at the upper end position, the other end of the fixture 3 is moved down to such a position in the up-and-low direction that the automobile body W is completely immersed in the treating liquid in a horizontal posture, and then in a state in which the above other end is stopped, the above one end is moved down to such a position that the automobile body W is completely immersed in the treating liquid in a horizontal posture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support frame for hanging a jig for supporting an automobile body at one end and the other end of the jig in the vehicle length direction via a cable. Using equipment that is equipped with separate lifting devices that raise and lower the vehicle length direction one end and the other end through each of the ropes, with the vehicle body supported by a jig, pre-painting treatment, The present invention relates to a method for immersing an automobile body in a treatment liquid in a treatment tank for performing a surface treatment such as electrodeposition coating.

[0002]

2. Description of the Related Art Conventionally, as this type of immersion method, Japanese Patent Laid-Open Publication No. 3-159 discloses a jig in which a jig is inclined at a position above a processing tank so that the other end in the vehicle length direction is lower than the one end in the vehicle length direction. There is known a method in which the vehicle body is tilted to a posture, the jig is lowered in this posture, and the vehicle body is immersed in a processing liquid in a processing tank.

[0003]

The above-mentioned conventional method is,
The aim is to allow the vehicle body to smoothly enter the processing liquid in an inclined position, but secure the depth required to completely immerse the vehicle body in the processing liquid in the processing tank while maintaining the inclined position. Therefore, it is necessary to enlarge the processing tank. In addition, the vehicle body receives the buoyancy when the lower end portion in the inclined direction lands on the processing liquid and temporarily floats on the liquid surface, so that the inclination becomes gentle, and thereafter, the processing liquid flows into the vehicle cabin. The end sinks below the liquid level and returns to the original inclined posture. Therefore, when the lowering speed of the jig is increased, the upper end portion of the vehicle body inclining direction is immersed in the processing liquid before the lower end portion of the vehicle body inclining direction sinks below the liquid level, and the entire vehicle body becomes liquid. The jig moves freely in the horizontal direction due to loosening of the ropes at both ends where the jig is suspended and the jig moves freely in the horizontal direction, and the car body comes into contact with the tank wall of the processing tank and deforms the car body Sometimes. Therefore, the lowering speed of the jig must be reduced. Here, in the method of the conventional example, it is necessary to increase the descending distance of the jig in accordance with the height difference between the upper end and the lower end of the vehicle body in the inclination direction, and the descending speed of the jig is reduced. Together with the necessity, the time required for immersing the car body becomes longer.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a method capable of immersing an automobile body in a processing solution in a processing tank in a short time without increasing the size of the processing tank. I have.

[0005]

Means for Solving the Problems In order to solve the above problems,
The present invention provides a jig for supporting a vehicle body by using equipment having a jig for supporting the vehicle body, and separate lifting devices for vertically lifting and lowering one end and the other end of the jig in the vehicle length direction. In a method of immersing in a processing solution in a processing tank while supporting the
With the one end in the vehicle length direction of the jig stopped at a position above the level of the processing liquid in the processing tank, the other end in the vehicle length direction of the jig is completely inserted into the processing liquid with the vehicle body in a horizontal posture. A first step of lowering the other end of the jig to a position corresponding to the vertical position of the other end when immersed; And lowering the part to a position where the vehicle body is completely immersed in the processing liquid in a horizontal posture.

According to the present invention, in the first step, the other end in the vehicle length direction of the jig temporarily floats on the liquid surface due to the buoyancy received by the liquid entering portion of the vehicle body from the processing liquid. Although the rope is loosened, since the rope at one end in the vehicle length direction of the jig stopped at a position above the liquid surface does not loosen, the horizontal movement of the jig is suppressed. Further, since the depth of the processing liquid in the processing tank can be sufficient by the height of the vehicle body, there is no need to increase the size of the processing tank, and it is not necessary to take much time to immerse the vehicle body.

By the way, at the start of the second step, the processing liquid has already flowed into the cabin of the vehicle body,
In the process, when the other end in the vehicle length direction starts liquid entry, it does not receive buoyancy as much as occurs in the vehicle body. Therefore, even if the lowering speed of the one end in the vehicle length direction in the second step is faster than the lowering speed of the other end in the vehicle length direction in the first step, the jig does not move freely in the horizontal direction. In this way, the immersion time can be reduced as much as possible.

A rod member swingable around an axis in the vehicle width direction is pivotally mounted on at least one end of the jig in the vehicle length direction, and one end of the jig in the vehicle length direction is hung on the rod member. In addition to connecting the ropes to be held, a vertically long cylindrical guide is vertically mounted on the support frame, in which the rod member is vertically movably inserted at a position above the level of the processing liquid in the processing tank. And
In the first step, if one end of the jig in the vehicle length direction is stopped at a position where the rod member does not come out below the cylindrical guide, the cylindrical guide into which the rod member is inserted during the step, The horizontal movement of the jig can be reliably prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, reference numeral 1 denotes a processing tank, and reference numeral 2 denotes a support frame formed of a hanger for transporting a vehicle body. The support frame 2 is vertically movably suspended through a rope 4 _1, 4 ₂ consisting respectively rope or chain in the jig 3 for supporting the car body W is the vehicle length direction end portions,
The support frame 2 is stopped immediately above the processing tank 1, the jig 3 is lowered, and the vehicle body W is immersed in the processing solution in the processing tank 1. Processing is performed.

[0010] the support frame 2 is provided with a first lifting device 5 ₁ consisting hoist to lift the vehicle length direction end portion of the jig 3 (front end) via the rope 4 _1, Car jig 3 long direction end portion and a second lifting device 5 ₂ consisting hoist to lift the (rear end) via the rope 4 ₂ is mounted.

[0011] Also, in the the front and rear ends of the jig 3, respectively, in the vertical direction lengthwise of the rod member 6 _and 62 of the lower end the shaft 6
In FIG. 1, a is pivotally mounted around an axis in the vehicle width direction, and the ropes 4 ₁ , 4 ₂ are connected to the rods 6 ₁ , 6 ₂ . And, at the front end and the rear end of the support frame 2,
At the position above the liquid level of the processing liquid in the processing tank 1, each of the rod members 6 ₁ and 6 ₂ is vertically movably inserted and vertically elongated tubular guides 7 ₁ and 7 ₂ are vertically installed. I have. Each of the rod members 6 ₁ and 6 ₂ is a small rod that is swingable around an axis in the vehicle width direction via a shaft 6c at an upper end of a rod body 6b that is pivotally attached to each end of the jig 3 as described above. The small rod 6d is connected to the ropes 4 ₁ and 4 ₂ at the upper end thereof.

When the vehicle is transported, both ends of the jig 3 are held at the raised end positions as shown in FIGS. 1 and 3 (a). In this state, each rod member 6 ₁ , 6 ₂ is connected to each cylindrical guide 7 ₁ , 7 ₂
To prevent the jig 3 from swinging when the vehicle is transported.
In the surface treatment of the vehicle body W, the support frame 2 is stopped at a position immediately above the processing tank 1, and then the rear end of the jig 3 is hung while the front end of the jig 3 is held at the rising end position. Cord 4 ₂
And lower this rear end. Here, FIG.
When an automobile body W as shown in (b) is Chakueki, buoyancy is generated in the automobile body W, it may rope 4 ₂ slackens. However, the rod member ₆₁ of the front end portion of the jig 3 is inserted into the cylindrical guide _71, horizontal movement of the jig 3 is prevented. Furthermore, in this case, if the deceleration of the lowering speed of the rear end portion of the jig 3 before and after the automobile body W is Chakueki the treatment liquid, it is possible to reduce the looseness produced in the rope 4 _2, the jig 3 Horizontal movement can be more reliably prevented. Thereafter, when the vehicle body W is completely immersed in the processing liquid in a horizontal posture, the rear end of the jig 3 is positioned at a position corresponding to the vertical position of this rear end as shown in FIG. Is stopped, and this is the end of the first step of lowering the jig 3.

[0013] After completion of the first step, feeding the rope 4 _1, and starts lowering of the front end portion of the jig 3, as FIG. 3 (d),
The lowering of the front end of the jig 3 is stopped at the vertical position where the rear end of the jig 3 has stopped lowering in the first step. This allows
The vehicle body W is completely immersed in the processing liquid in a horizontal posture, and this is the end of the second step of lowering the jig 3. In this case, unlike the first step, since the processing liquid has already flowed into the cabin of the vehicle body W, the buoyancy newly generated in the vehicle body W due to the lowering of the front end of the jig 3 is small. rope 4 ₁ will not be loosened enough to move freely. Therefore, in the second step, the lowering speed of the end of the jig 3 can be increased as compared with the first step, and by doing so, the time required for immersing the vehicle body W can be reduced.

In the illustrated embodiment, the rear end of the jig 3 is moved down first, and the front end of the jig 3 is moved down. However, the front end of the jig 3 is moved down first. The vehicle body W may be immersed by lowering the rear end later.

When the surface treatment of the vehicle body W is completed, the rear end of the jig 3 which has been lowered when the vehicle body W enters the tank is raised as shown in FIG. The front end of the tool 3 is raised to return to the state shown in FIG. According to this, the time during which the front and rear portions of the vehicle body W are immersed in the processing liquid is the same, and a uniform surface treatment can be performed on the entire vehicle body W. Further, in the ascending process of the rear end of the jig 3, the vehicle body W gradually tilts rearward and upward, so that air can smoothly enter the vehicle interior and the vehicle body W
Is discharged smoothly.

[0016]

As is apparent from the above description, according to the present invention, the size of the processing tank can be reduced, and the time required for immersing the vehicle body W can be shortened, so that the productivity is greatly improved. I do.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an example of equipment used for carrying out the method of the present invention.

FIG. 2 is a side view cut along the line II-II of FIG. 1;

FIG. 3 Immersion process diagram

[Explanation of symbols]

W Automobile body 1 Processing tank 2 Support frame 3 Jig 4 ₁ , 4 ₂ Cord 5 ₁ , 5 ₂ Lifting device 6 ₁ , 6 ₂ Rod member 7 ₁ , 7 ₂ Cylindrical guide

Claims (3)

[Claims] 1. A support frame for suspending a jig supporting an automobile body at one end and the other end in the vehicle length direction of the jig via a cable, respectively. A method of immersing the other end of the vehicle in a processing solution in a processing tank while supporting the vehicle body with a jig by using a facility equipped with a separate lifting device that moves up and down through each of the ropes. With the one end in the vehicle length direction of the jig stopped at a position above the level of the processing liquid in the processing tank, the other end in the vehicle length direction of the jig is completely inserted into the processing liquid with the vehicle body in a horizontal posture. A first step of lowering the jig to a position corresponding to the vertical position of the other end when immersed in the jig; A second step of lowering one end of the vehicle body to a position where the vehicle body is completely immersed in the processing liquid in a horizontal posture. Car body method of immersion. 2. A lowering speed of the one end of the jig in the vehicle length direction in the second step is higher than a lowering speed of the other end of the jig in the vehicle length direction in the first step. 2. The method for immersing an automobile body according to claim 1. 3. A rod member swingable around an axis in a vehicle width direction is mounted on at least one end of the jig in the vehicle length direction, and one end of the jig in the vehicle length direction is hung on the rod member. In addition to connecting the ropes to be held, a vertically long cylindrical guide is vertically mounted on the support frame, in which the rod member is vertically movably inserted at a position above the level of the processing liquid in the processing tank. 3. The vehicle body according to claim 1, wherein in the first step, one end of the jig in the vehicle length direction is stopped at a position where the rod member does not come out below the cylindrical guide. Immersion method.