JPH0230038Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rust preventive coating device for automobiles that allows one hand to be freed during coating operations to improve work efficiency and finish accuracy after coating. The majority of automobile chassis, bodies, and their auxiliary equipment are made of metal materials, and some of these are painted or plated to prevent rust and corrosion. These types of regular maintenance inspections are essential because the environments in which they are used are diverse, such as coastal areas, snowy areas, industrial areas, and salt-damaged areas, as well as atmospheric pollution, which promotes the progression of rust and corrosion. This type of maintenance inspection is especially necessary for areas that are not easily inspected on a daily basis, such as the bag-like structure, joints, and the back of the bumper, and it is generally recommended to apply a rust preventive agent to such areas. This prevents the occurrence of rust or inhibits its progress. Conventionally, when applying this rust preventive agent, a spray gun as shown in FIG. A bendable liquid supply hose 5 is connected to the tip of the gun body 2 via an injection nozzle 4, and a water spray nozzle 6 is attached to the tip of this liquid supply hose 5, and a compressed air conduit 1 is connected to the tip of the gun body 2.
The compressed air led to the tank 3 is mixed with the rust preventive agent in the chemical solution tank 3, and this mixture is injected from the injection nozzle 4, and the atomized mixture is guided to the tip of the liquid supply hose 5, and the mixture is sent to the water spray nozzle. It was configured to be dispersed from 6 onwards. However, in this way, the gun body 2 and the chemical tank 3
If a rust preventive agent is stored in the chemical tank 3, it becomes heavy, and especially when using a flexible fluid supply hose 5 as shown in the figure, the gun body 2 cannot be held with one hand. However, since the liquid supply hose 5 was held with the other hand and carried to the designated application area of the car, it was very labor-intensive and both hands were occupied during the work, resulting in poor work efficiency. In addition, the chemical solution tank 3 shown in the figure has a certain limit in capacity, and it is necessary to replenish the chemical in the middle of the work, which causes an interruption in the application work, resulting in poor efficiency. Moreover, in this conventional system, the compressed air and rust preventive agent were mixed at the injection nozzle 4 position, and this mixture was led to the long liquid supply hose 5, so the water spray nozzle 6 was easily clogged. In some cases, only compressed air is blown out, resulting in problems such as uneven coating and reduced reliability of rust prevention treatment. The present invention solves these conventional problems by configuring the chemical tank and the rust preventive and compressed air supply operation parts separately, increasing the capacity of the chemical tank and eliminating interruptions in coating work. This improves work efficiency by allowing the operation section to be operated with the foot and using one hand during work. On the other hand, the compressed air and rust preventive agent are mixed at a position immediately before the water spray nozzle, preventing clogging of the water spray nozzle. This ensures reliability of anti-corrosion treatment by preventing coating unevenness caused by this.
Provided is a rust preventive coating device for automobiles that is capable of supplying compressed air and rust preventive agent simultaneously or selectively, thereby improving the accuracy of coating conditions, promoting drying, and simplifying maintenance. The purpose is to For this reason, the automotive rust preventive coating device of the present invention includes a chemical solution tank that communicates with a pneumatic source and stores a rust preventive agent inside, a liquid supply petal, an air supply petal, and a control that is opened and closed via these petals. A liquid supply pipe communicating with the chemical liquid tank is connected to the inlet side of one of the control valves, and an air supply pipe communicating with the air pressure source is connected to the other control valve, and these control valves are provided with valves. An operation pedal that can be selectively opened and closed, and a liquid supply hose and an air supply hose that have one end connected to the outlet side of the control valve are separately arranged, and a short or long rigid hose is attached to the other end of the hose. It is characterized by the fact that the nozzles are shared and installed. Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIGS. 2 to 7, 7 is a conduit that communicates with a pneumatic source such as an air compressor, and its terminal end is connected to a pneumatic pipe 8 and an air supply pipe 9. One end of the pneumatic pipe 8 is led into a large-capacity chemical liquid tank 10, making it possible to increase the internal pressure of the tank 10.
The chemical solution tank 10 stores a liquid rust preventive agent 11 for automobiles in a substantially cylindrical pressure vessel, and has rollers 12 attached to its bottom surface to enable it to move on a work floor 13. Reference numeral 14 denotes a liquid supply pipe whose one end is disposed at the bottom of the chemical liquid tank 10, and the other end is guided into the inside of the liquid supply petal 16 of the operation pedal 15, so that the rust preventive agent 11 can be supplied, and the liquid supply pipe 16 is One end of the air supply pipe 9 for supplying compressed air is guided into the adjacent air supply petal 17. As shown in FIGS. 3 to 5, the operating pedal 15 includes a petal case 22 consisting of a front plate 18, side plates 19, 20, and a bottom plate 21. Inside this petal case 22, there is a horizontally long groove having a substantially L-shaped cross section. A liquid supply petal 16 and an air supply petal 17 are accommodated adjacently,
A pin 25 is installed between the leg pieces 23 and 24 attached to the base end portions and the side plates 19 and 20, and these petals 16 and 17 are rotatably supported. And petals 16 and 17 are always pin 25
The front end portion is urged upward via springs 26 and 27 attached to the front plate 18, and this portion is brought into contact with the bent edge 18a of the front plate 18, thereby regulating the upward rotation angle of the petals 16 and 17. ing. 28, 29
are through holes formed separately in the front plate 18, through which the air supply pipe 9 and the liquid supply pipe 14 are inserted, and the ends of these pipes are connected to the control valve 3 provided inside the operating pedal 15 .
It is connected to respective inlet ports 32 and 33 of 0 and 31. In the case of the embodiment, the control valves 30 and 31 have the same structure, and for convenience, the control valve 30 will be explained.
A hollow chamber 34 is provided that communicates with 2, and this hollow chamber 34 is open at the top, and also communicates with an outlet port 35 and a drain 36. It is slidably housed in the A spring 38 is provided between the lower end of the spool 37 and the bottom of the hollow chamber 34.
The spool 37 is normally urged upward to block the communication between the inlet and outlet ports 35 and 32, while making the inlet port 32 and the drain 36 communicate with each other via a bypass groove (not shown). The rust preventive agent 11 supplied from 14 is guided to a recovery tank (not shown). A roller 39 is rotatably supported on the upper end of the spool 37, and is normally in contact with the back surface of the bent part of the liquid supply petal 16, as shown in FIG. The spool 37 is pushed down to bring the inlet and outlet ports 35 and 32 into electrical continuity. 4
0 and 41 are hose insertion holes provided on the side plate 19,
These are hoses (not shown) that communicate with the drain 36.
Then, a liquid supply hose 42 having one end connected to the outlet port 35 is led out to the outside of the petal. The same reference numerals are used for the components of the control valve 31 that correspond to those of the control valve 30, and 43 in the figure is an air supply hose whose one end is connected to the outlet port 35. The liquid supply hose 42 and the air supply hose 43 led out from the operation pedal 15 have appropriate lengths,
During this time, it is desirable to bind these hoses with an appropriate member. For example, a short and small nozzle 44 capable of receiving both hoses 42 and 43 as shown in FIG. 2a is attached to the other ends of these hoses 42 and 43. , mixing the rust preventive agent 11 and compressed air in this nozzle 44,
Either make it possible to spray this air-fuel mixture to the outside, or install a nozzle 45 that also serves as a holding pipe as shown in FIG. I try to spray from the tip of the 45. In addition, numerals 46 and 47 in the figure are service personnel and their feet, 48 is a lift for automobile maintenance, and 49 is a maintenance vehicle. When applying a rust preventive agent to the maintenance vehicle 49 using the application device configured as described above, for example, an air compressor is driven and compressed air whose pressure is regulated by a pressure reducing valve etc. is guided to the conduit 7, and the terminal end of the The compressed air is divided into the pneumatic pipe 8 and the air supply pipe 9, and the compressed air separated into one of the pneumatic pipes 8 is guided into the chemical liquid tank 10.
Rust preventive agent 1 housed inside by increasing the internal pressure of 0
1 is sent to the liquid supply pipe 14 and supplied to the input port 32 of one control valve 30 inside the operating pedal 15 , while the compressed air branched to the other air supply pipe 9 is sent to the other control valve 31 inside the operating pedal 15 . The inlet port 33 of the The control valves 30 and 31 inside the operating pedal 15 are normally connected to the spool 3 as shown in FIGS. 4 and 5.
7 is forced upward and closes the inlet/outlet ports 33 and 35, cutting off communication between them, so the rust preventive agent 11 and compressed air cannot be supplied to the liquid supply hose 42 and the air supply hose 43. First, these are led to the drain 36 from the inlet ports 32 and 33 via each bypass groove, and are discharged to the outside of the operating pedal 15 through a discharge pipe as appropriate. Of these, the rust preventive agent 11 is stored in a recovery tank (not shown). Ru. Therefore, when supplying the rust preventive agent 11 and compressed air to each hose 42, 43 and spraying the mixture from the nozzle 44, step on the liquid supply petal 16 and the air supply petal 17 with your foot 47 at the same time. The petals 16, 17 of the springs 26, 27, 3
Push down against the restoring force of 8, each petal 16,1
7. Push down the spools 37 of the control valves 30 and 31 located directly below the control valves 30 and 31. In this state, the control valve 30,
31, so for the sake of convenience, we will explain the control valve 30. As the spool 37 moves downward, the hollow chamber 34 and the outlet port 35 gradually become connected to each other, and the inlet port 32, the hollow chamber 34, and the outlet port 35 gradually become connected to each other. As the blockage is gradually released and a flow path is formed from the liquid supply pipe 14 to the liquid supply hose 42 as shown in FIG. It will lead you to 42. A similar situation is created in the control valve 31, and compressed air fed under pressure from the air supply pipe 9 is guided to the air supply hose 43. The rust preventive agent 11 and compressed air led to each hose 42, 43 in this way are separated from each other and pumped to the end of each hose 42, 43, and are mixed inside the nozzle 44 attached to the tip. Then, the air-fuel mixture is injected from the jet port of the nozzle 44. Therefore, since the rust preventive agent 11 and the compressed air are mixed or injected almost simultaneously, a drop in the injection pressure of the air-fuel mixture is prevented, and high-pressure injection can be expected accordingly, which prevents clogging of the nozzle 44. In addition to preventing uneven coating caused by this, it is possible to spray air-fuel mixture droplets far away, and it is possible to strengthen the fixing power of the rust preventive agent 11 and expand the application area. Moreover, since the rust preventive agent 11 and the compressed air have a very short path after being mixed, agglomeration and dripping of droplets of the air-fuel mixture in this path can be prevented, and the air-fuel mixture can be effectively injected. On the other hand, the application state at this time is such that, for example, as shown in FIG.
2 and the air supply hose 43, and bring the nozzle 44 to a position close to the lifted maintenance vehicle 49, and operate the operating pedal 15 with one foot 47, freeing one hand and making it possible to use it. ing. Therefore, during coating work, for example, the doors, bonnet, back doors, windows, etc. of the maintenance vehicle 49 can be opened and closed, and this type of work can be performed efficiently. Even if it is a drug, it can be moved by simply moving it, which eliminates the trouble and labor burden of refilling the chemical solution. Note that the nozzle 4 shown in FIG. 2b
5, when using rust preventive agent 11 at its base end.
This is mixed with compressed air and sprayed at the tip of the nozzle 45, making use of the long length and rigidity of the nozzle 45.
It becomes possible to apply the coating to the bag-like structure part, dense structure part, gap part, etc. of 9. After completing the coating work on a predetermined area in this manner, for example, if the depression operation of the liquid supply petal 16 is released and only the depression operation of the air supply petal 17 is continued, the liquid supply petal 16 will be moved by the restoring force of the springs 26 and 38. Then, the spool 37 moves up and closes the inlet and outlet ports 35 and 32, so the supply of the rust preventive agent 11 to the liquid supply hose 42 is stopped.
Since only compressed air is injected from the nozzle 44, by spraying this onto the coated surface after coating, drying of the coated surface is accelerated and this type of work can be speeded up. In addition, in this coating device, the degree of conductivity of each entrance/exit 35, 32, 35, 33 is determined depending on the degree of depression of each petal 16, 17, in other words, the amount of supply of the rust preventive agent 11 and compressed air, and the rust prevention after application. The agent concentration can be adjusted to obtain the optimum coating liquid and coating condition. After application both petals 16 and 17
If the depressing operation is released and the supply of the rust preventive agent 11 and compressed air to the nozzle 44 is stopped,
The coating operation can be temporarily interrupted, and the air compressor can be stopped after the series of operations are completed. Although normally closed valves were used as the control valves 30 and 31 in the above embodiment, the control valves 30 and 31 are not limited to this, and it is also possible to use normally open valves.
Although the petals 16 and 17 are used as operating means for the control valves 31, it is also possible to use push buttons that can be operated with the foot, and furthermore, the control valves 30 and 31 are mechanically opened and closed by an external force. It is also possible to control opening and closing by electromagnetic force using, for example, a solenoid valve. As described above, the automotive rust preventive coating device of the present invention has a separate chemical tank, operation pedal, and nozzle, so it can reduce the labor burden compared to conventional systems that have these all integrated. At the same time, since one hand can be freed and used during application work, preparation operations and incidental work can be performed with one hand, which has the effect of improving work efficiency. In addition, the control pedal is equipped with a control valve that can be selectively opened and closed, making it possible to supply rust preventive and compressed air simultaneously or selectively.
While the concentration of the rust preventive agent in the coating solution and the coating conditions can be adjusted as appropriate depending on the object to be coated, for example, if only compressed air is sprayed from the nozzle, this type of work can be done quickly by accelerating the drying of the coated surface after coating. It has the effect of being able to perform the same operations, and it also has the effect of eliminating clogging of the nozzle, which is convenient for maintenance. Furthermore, in this invention, the liquid supply hose and the air supply hose are arranged separately and guided to a common nozzle, which prevents the injection pressure of the air-fuel mixture from being lost or decreased, thereby preventing the nozzle from clogging. At the same time, it is possible to prevent uneven coating due to nozzle clogging, improve the finishing accuracy after coating, and ensure the reliability of this type of anti-corrosion treatment.Moreover, the air-fuel mixture can be injected over a long distance. A wide injection area can be secured. Moreover, in this case, if a short and small nozzle is used, it is possible to increase the injection pressure and expand the spray area, and it is also possible to prevent the mixture from dripping inside the nozzle. On the other hand, if a long and rigid nozzle is used, it has the practical effect of being able to easily coat areas such as dense structures and gaps.

[Brief explanation of drawings]

Fig. 1 is a front view showing a conventional example, Fig. 2a is an explanatory drawing showing an embodiment of the present invention, Fig. 2b is a front view showing another example of the nozzle, and Fig. 3 is a front view showing an example of the present invention. A plan view showing an example of the operating pedal, FIG. 4 is a sectional view taken along the line A-A' in FIG. 3, and FIG. 5 is a sectional view taken along the line B-- in FIG.
FIG. 6 is a sectional view taken along line B', FIG. 6 is a sectional view showing the operating state of the operating pedal, and FIG. 7 is a front view showing an example of the operating state of the present invention. 9... Air supply pipe, 10... Chemical solution tank, 11...
Rust preventive agent, 15 ...operation petal, 16...liquid supply petal, 17...air supply petal, 30, 31...control valve, 42...liquid supply hose, 43...air supply hose,
44, 45... Nozzle.

Claims (1)

[Scope of utility model registration request] A chemical tank 10 that communicates with a pneumatic source and stores a rust preventive agent 11 therein, a liquid supply petal 16, and an air supply petal 1.
7 and control valves 30 and 31 that are opened and closed via these petals 16 and 17, and a liquid supply pipe 14 that communicates with the chemical tank 10 is connected to the inlet side of one of the control valves 30, and the other control valve 30 is connected to the inlet side of the control valve 30. An air supply pipe 9 communicating with the air pressure source is connected to the valve 31, and an operating pedal 15 that can selectively open and close these control valves 30, 31 is connected at one end to the outlet side of the control valves 30, 31. A liquid supply hose 42 and an air supply hose 43 are arranged separately, and a short or long rigid nozzle 4 is installed at the other end of these hoses 42 and 43.
A rust preventive coating device for an automobile, characterized in that parts No. 4 and 45 are installed in common.