JP2003251235A - Apparatus for cleaning article to be coated before being coated - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a apparatus for cleaning an article to be coated before being coated in which working efficiency is improved by preventing the clogging of a spray nozzle in cleaning work carried out as a pre-treatment for the coating of pillars, beams or the like of a building. <P>SOLUTION: The apparatus 1 for cleaning the article to be coated has: a pump 6 for supplying a cleaning liquid to a pipe 5 possessing a spray nozzle 4 for spraying the cleaning liquid to the article 3-to-be-coated transported by being hung by a conveyer 2; and a recovering vessel 7 for recovering the cleaning liquid after being sprayed from the spray nozzle 4 and used for the cleaning. The downstream side end part 8 of the pipe 5 mounting the spray nozzle 4 is opened, and a valve 9 intermittently opened and closed every prescribed time is provided in the pipe 5 between the downstream side end part 8 and the spray nozzle 4. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-painting cleaning apparatus for an object to be coated, which is used in a cleaning operation performed as a pretreatment for coating a pillar, a beam or the like of a building.

[0002]

2. Description of the Related Art When painting pillars, beams, etc. used in construction, it is necessary to wash the surface of an object to be coated with a cleaning liquid as a pretreatment step. It is a pre-painting cleaning device for painted objects. This has a pump for supplying a cleaning liquid to a pipe having an injection nozzle for injecting the cleaning liquid onto an object to be coated while being suspended by a conveyor, and the cleaning liquid after being sprayed from the injection nozzle for cleaning. It is equipped with a collection tank for collection.

A conventional pre-painting cleaning device 12 for an object to be coated will be described below with reference to FIG. 2 is a conveyor,
The article 3 to be coated is conveyed via the hanger 13. The pipe 5 arranged around the passage through which the article to be coated 3 has a plurality of jet nozzles 4, and the cleaning liquid is jetted from the jet nozzles 4 to the article to be coated 3. The cleaning liquid after cleaning is collected by the scattering prevention wall 10 and returned to the recovery tank 7. The cleaning liquid in the recovery tank 7 is pumped up by the pump 6 and supplied again to the injection nozzle 4. here,
The downstream end of the pipe 5 had a closed structure as shown in FIG.

[0004]

However, in the above-mentioned conventional pre-painting cleaning apparatus 12 for an object to be coated as described above, the solidified material 15 generated at the downstream end 14 of the pipe 5 causes the injection nozzle 4 to reach the injection nozzle 4. Clogging occurs, and it takes a lot of work time to clean the clogging,
There is a problem in that it is necessary to stop the cleaning device 12 once, which reduces the efficiency of the entire work. This is because the downstream end 14 of the pipe 5 is closed, so that the flow of the cleaning liquid is stagnated at the end 14 and the solid components in the cleaning liquid are consolidated to cause retention solidification, This is because the solidified matter 14 is clogged in order from the injection nozzle 4A located at the top as the solidified material 14 accumulates downward as time passes.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a pre-painting cleaning apparatus for an object to be coated, which improves work efficiency by preventing clogging of the injection nozzle.

[0006]

[Means for Solving the Problems] The concrete means for solving the above-mentioned object are as follows. That is, the invention described in claim 1 has a pump for supplying the cleaning liquid to a pipe having an injection nozzle for injecting the cleaning liquid onto an object to be coated which is conveyed while being suspended by a conveyor, and ejects from the injection nozzle. In a pre-painting cleaning device for an object to be coated, which is equipped with a recovery tank for recovering the cleaning liquid after cleaning, the downstream end of the pipe equipped with the injection nozzle is opened, and the downstream end and the A feature is that a valve that intermittently opens and closes every predetermined time is provided in a pipe between the injection nozzles.

The invention described in claim 2 is characterized in that, in the structure described in claim 1, the downstream end of the pipe is located above the recovery tank.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A pre-painting cleaning apparatus 1 for an object to be coated according to an embodiment of the present invention will be described below with reference to the drawings.
The same components as those of the conventional technique are designated by the same reference numerals and the description thereof will be omitted. The pre-painting cleaning apparatus 1 for an object to be coated according to the embodiment of the present invention is, as shown in FIGS. 1 and 2, an object to be coated 3 that is conveyed while being suspended by a conveyor 2.
A pump 6 for supplying the cleaning liquid to a pipe 5 equipped with an injection nozzle 4 for injecting the cleaning liquid, a recovery tank 7 for recovering the cleaning liquid after being injected by the injection nozzle 4 and cleaned, and an opened pipe. A downstream side end portion 8, a valve 9 provided in the pipe 5 between the downstream side end portion 8 and the injection nozzle 4 and opened and closed intermittently at a predetermined time, and a cleaning liquid after cleaning is scattered around. It is composed of a penetration hole 11 provided in the shatterproof wall 10 for preventing the above. The details will be described below.

The downstream end 8 of the opened pipe 5 is
This is for discharging the cleaning liquid staying in the vicinity of the end portion 8 to the outside of the pipe, whereby it is possible to prevent the cleaning liquid from staying and solidifying.

A penetration hole 11 provided in the shatterproof wall 10
Is for locating the downstream end 8 of the pipe 5 above the recovery tank 7. In this embodiment, the pipe 5
Is extended to the downstream side, the pipe 5 is once exposed to the outside of the shatterproof wall 10 above the shatterproof wall 10, and then the pipe 5
The pipe 5 at the bottom of the shatterproof wall 10
By penetrating the penetration hole 11 from the outside to the inside of the shatterproof wall 10, the downstream end 8 of the pipe 5
Is located above the recovery tank 7. By adopting such a piping arrangement mode, the valve 9 is prevented from scattering.
It is possible to provide the valve 9 on the outside, and there is an advantage that the operator can easily operate the valve 9.

Since the valve 9 is provided between the downstream end 8 of the pipe 5 and the injection nozzle 4, it has a role of maintaining the injection pressure of the injection nozzle 4 by closing the position of the pipe 5. By manually opening or closing the valve 9 at predetermined intervals by a motor or the like, the flow of the cleaning liquid accumulated in the vicinity of the valve 9 is arbitrarily controlled.

If an electromagnetic valve is used as the valve 9, the valve 9 can be remotely operated. Even if the valve 9 is disposed inside the shatterproof wall 10, the shatterproof wall 1
An operator outside 0 can operate the valve 9. In this case, as an arrangement mode of the pipe 5, as in the present embodiment, the pipe 5 is once exposed to the outside of the shatterproof wall 10, and the penetration hole 11 is formed.
It is not necessary to return the inside of the shatterproof wall 10 to the inside again, and as shown in FIG. 3, the downstream end 8 of the pipe 5 may be directed downward in the shatterproof wall 10. There is an advantage that it is not necessary to provide the penetrating hole 11 in 10.

The operation of the pre-painting cleaning apparatus 1 for an object to be coated constructed as described above will be described below. The valve 9 provided as described above is normally closed. Then, for example, once every 30 minutes for about 1 minute, this valve 9
Open up. In this manner, the valve 9 is opened and closed intermittently every predetermined time, and the solid component in the cleaning liquid staying in the vicinity of the valve 9 is discharged to the outside of the pipe before being consolidated and solidification is started. The clogging of No. 4 can be prevented in advance. Further, the cleaning liquid discharged from the valve 9 is recovered in the recovery tank 7 by the downstream end 8 of the pipe 5 being located above the recovery tank 7, and is again returned to the injection nozzle 4 via the pump 6. Since it is supplied, the cleaning liquid can be effectively used.

[0014]

As described above, according to the first aspect of the present invention.
According to the invention, the solid component in the cleaning liquid staying in the vicinity of the valve is discharged to the outside of the pipe before solidification is started, so that the clogging of the injection nozzle can be prevented in advance and before the coating of the object to be coated. The troublesome work of once stopping the operation of the cleaning device and cleaning the piping and the injection nozzle is unnecessary. As a result, the labor required for cleaning the injection nozzle,
The cost can be reduced and the efficiency of the whole work can be improved.

According to the second aspect of the present invention, in addition to the above effect, the cleaning liquid discharged from the valve is collected in the collecting tank and is supplied again to the injection nozzle via the pump. It is possible to effectively use the cleaning liquid.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view of a pre-painting cleaning apparatus for an object to be coated according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view of the pre-painting cleaning device for the object to be coated in FIG.

FIG. 3 is a schematic perspective view of a pre-painting cleaning apparatus for an object to be coated according to the embodiment of the present invention when an electromagnetic valve is used.

FIG. 4 is a schematic vertical cross-sectional view of a pre-painting cleaning device for an object to be coated according to a conventional example.

[Explanation of symbols]

1, 12 Pre-painting cleaning equipment for painted objects 2 conveyors 3 Objects to be coated 4 injection nozzles 5 piping 6 pumps 7 collection tank 8 Downstream end of piping 9 valves

Claims (2)

[Claims] 1. A pump for supplying a cleaning liquid to a pipe having an injection nozzle for injecting the cleaning liquid onto an object to be coated, which is carried while being suspended by a conveyor, and has a pump after spraying from the injection nozzle for cleaning. In a pre-painting cleaning apparatus for an object to be coated, comprising a recovery tank for recovering a cleaning liquid, a downstream end of a pipe provided with the injection nozzle is opened, and a pipe between the downstream end and the injection nozzle A pre-painting cleaning device for an object to be painted, which is provided with a valve that opens and closes intermittently at predetermined intervals. 2. The pre-painting cleaning apparatus for an object to be coated according to claim 1, wherein the downstream end of the pipe is located above the recovery tank.