JPS6218297Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a submerged immersion device that is applied to internal coating of hollow objects such as fuel tanks for motorcycles.

Conventionally, in order to paint the inner surface of a hollow object,
There are two methods: fixing the object to be painted, inserting a paint gun through the opening, and spraying the paint onto the inner surface while rotating the gun, and another method of sealing the paint inside and then rotating or vibrating the object to be painted. A widely used method is to spread the paint over the inner surface and then discharge the remaining paint, but these methods are time-consuming, do not allow uniform treatment, and are not suitable for mass production. There is a problem when you don't have it.

On the other hand, this method of immersing the object to be coated in a paint solution and painting the inner surface is suitable for mass production because it allows a large number of objects to be coated to be treated at the same time as needed, but on the other hand, This has the disadvantage of causing uneven coating due to air pockets formed inside. In addition, regarding a device in which an air vent pipe is inserted from the outside in order to eliminate this air pocket, for example, Japanese Patent Application Laid-Open No. 56-97570 or Japanese Utility Model Application No. 55-111567
Although these proposals are effective when the opening is large enough or located on the side, they are effective when the opening is large enough or located on the side, but when the opening is small such as a motorcycle fuel tank, If the opening is located upward, there remains the problem that the air inside cannot necessarily be completely exhausted.

In view of this problem, the present invention aims to provide a device that can uniformly, completely and efficiently treat the inner surface of hollow objects with small openings, such as motorcycle fuel tanks. The details of the present invention will be explained below based on the illustrated embodiments.

The drawing shows one embodiment of the present invention, and the reference numeral 1 in the drawing indicates, for example, a container that is moved up and down in processing tanks 5 for degreasing, washing, painting, etc., which are arranged along the running path. This is a trolley-type processing basket jig, which includes a plurality of jigs 2 that hold fuel tanks 6 as hollow objects to be coated with small openings, and a plurality of jigs 2 disposed below these jigs 2, which will be described later. Collection member 3
and an air vent pipe 4 for discharging the residual air in the fuel tank 6 to the outside of the liquid via the collecting pipe member 3. Several units A are mounted fixedly or removably one on top of the other.

Figures 2 and 3 show the main parts of the above-mentioned device, especially for the present invention.
Here, an example of internal painting of a fuel tank 6 for a motorcycle as shown in FIG. 4 will be explained. This fuel tank 6 has a fuel inlet 61 on the top surface,
Further, a fuel supply port 62 leading to the engine is opened at the lower part of one side. The jig 2 provided on the processing basket jig 1 engages with this fuel injection port 61 to support the fuel tank 6 upside down, and the jig 2 is inserted into the fuel tank 6 through a small hole 21 bored in the lower surface of the jig 2. It is configured to allow paint to flow into the container. On the other hand, the pipe collection member 3 disposed below the jig 2 is a ring-shaped cylinder with a sealed top end and a large number of sockets 33 on the circumferential surface, as shown in FIG. Pipe 31 and this cylindrical pipe 31
The float valve opens and closes the lower end opening 32 of the float valve.

The above-mentioned float valve is disposed in a casing 37 provided at the lower end of the cylindrical pipe 31 as a float 35 equipped with a ball valve 36, and on the other hand, each of the above-mentioned sockets 33 has enough space to support the tank 6. One end of the air bleed pipe 4 having sufficient rigidity is connected, and the other end is connected to the tank bottom 63 on the side that does not have the fuel supply port 62 through the hole 22 provided in the center of the bottom surface of each jig 2. It extends up to support the tank 6 and at the same time exhausts any air remaining in this area. Furthermore, an exhaust pipe 41 that extends upward along the processing basket jig 1 is connected to one of these sockets 33, and its tip remains in the liquid even when the processing basket jig 1 is lowered. It is located at a height where it will not be submerged in water. Note that the reference numeral 34 in FIG. 3 indicates a seal ring provided at the opening edge of the cylindrical pipe 34.

In the embodiment described above, the fuel tank 6 is held upside down in the processing basket jig 1 via the jig 2, and the tip of the air vent pipe 4 is inserted into the tank 6, and then the processing basket jig 1 is attached to the paint. As it is immersed in the liquid, the collecting member 3 disposed below the jig 2 is first immersed in the liquid, and the float 35 rises to the surface of the ball valve 36.
The lower end opening 32 of the cylindrical tube 31 is closed. When the processing basket jig 1 is further lowered and the fuel tank 6 is submerged in the liquid, the paint liquid that has entered through the small hole 21 formed on the bottom surface of the jig 2 initially drains the air inside into the fuel supply port 62. It enters the tank 6 while being expelled from the tank, and after reaching the Futamata part (the state shown in Figure 2),
One of the air continues to enter the tank 6 through the fuel supply port 62, and the other air enters the tank 6 while being discharged to the outside through the air vent pipe 4, the cylindrical pipe 31, and the exhaust pipe. The filling operation of paint into the tank 6 can be completed by not only simply lowering the processing basket jig 1 but also by swinging it from side to side as necessary. When the air is filled, paint also flows into the cylindrical pipe 31 via the air vent pipe 4.

When the processing basket jig 1 is raised when the tank 6 is filled with paint, the paint in the tank 6 is transferred to the jig 2.
The paint flowing out from the small hole 21 on the lower surface and accumulated in the tube 31 is released from the opening 32 at the lower end of the tube 31, which is opened by the descent of the float 35, and is used for the next air bleeding operation. There will be no problem.

Although the above description has been limited to the painting process inside the motsubara tank 6, this device can be hung on a series of painting lines that include degreasing, washing with water, surface treatment, washing with water, washing with hot water, and drying. When setting
It is necessary to mold the pipe 4, float 35, ball valve 36, seal ring 34, etc. from heat-resistant and chemical-resistant materials.

As described above, according to the present invention, the air vent pipe member for discharging the gas inside the hollow object to be coated to the outside of the liquid and the exhaust pipe member are communicated through the collecting pipe member like a manifold. This not only simplifies the pipe system even in a device that processes a large number of hollow objects to be coated at the same time, but also allows these tubes to be stably held to prevent damage when the device is moved up and down.

What is also noteworthy is that a float valve is provided at the lower end of this collecting pipe member, which maintains airtight communication between each pipe in the liquid and ensures the exhaust of gas inside the hollow object to be coated. Not only can you do it, but
Outside the liquid, the opening is opened and the processing liquid that has flowed inside is released, so in conjunction with the lifting and lowering movement of the holding member, it is possible to always maintain the inside of the pipe in a condition that does not interfere with air purge operations. Become.

[Brief explanation of drawings]

FIG. 1 is a side view of a device showing an embodiment of the present invention, and FIG. 2 is an enlarged view of the main parts of the same device.
FIG. 3 is an enlarged sectional view of the collecting pipe member, and FIGS. 4A and 4B are a side view and a front view of an example of a hollow-shaped object processed by the above apparatus. DESCRIPTION OF SYMBOLS 1... Processing basket jig, 2... Jig, 3... Collection member, 31... Cylindrical pipe, 35... Float, 36...
...Ball valve, 4...Air bleed pipe, 14...Exhaust pipe, 5...Paint tank, 6...Fuel tank.

Claims (1)

[Scope of utility model registration request] A holding member for holding at least one hollow object having a small opening so that the opening is positioned downward and immersed in a processing liquid; and a mounting position of the hollow object. located below,
and an upper-end sealed tube collection member equipped with a float valve at the lower end, and an air vent pipe arranged such that one end communicates with the tube collection member and the other end reaches the top surface of the cavity of the hollow object to be painted. and an exhaust pipe member whose one end communicates with the collecting pipe member and whose other end is higher than the hollow object and protrudes above the surface of the processing liquid, the hollow object having a small opening. Equipment for immersing objects in liquid.