JP2003340320A - Coating apparatus for rudder inner surface due to loading of charge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating apparatus for coating matter in a region making a worker difficult to enter. <P>SOLUTION: The coating apparatus is equipped with an element for transporting a charged coating to the coating section of the matter, an element for spraying the coating transported by the transport element, and an element for applying charge opposite to that of the coating to the matter. Further, this coating apparatus has a means for applying pressure to the interior of the coating section. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for painting the inside of an object having a large number of obstacles, particularly the inside of the rudder of a hull.

[0002]

2. Description of the Related Art The rudder of a hull is always located under the sea except when entering a dock and performing repair work. Therefore, the sealed state is maintained so that seawater does not enter the rudder.

However, since the marine environment changes variously and the water temperature also changes, even if the sealed state is maintained, dew condensation occurs and it is impossible to completely remove water. Therefore, it is necessary to paint the inside of the rudder without leakage to prevent corrosion.

The inside of the rudder is provided with a skeleton structure in which support members are arranged in the lateral direction in order to ensure strength, and has a section in which a worker cannot enter the inside of the completed rudder. Therefore, it has been difficult to perform all of the above internal coating after the outer shell of the rudder has been formed.

Conventionally, as a method of painting the inside of the rudder, a method of previously painting the inside of the rudder before attaching the outer shell of the rudder to the frame structure and assembling it, and then applying a back plate and welding it has been adopted. . However, the conventional coating method has a problem that the coated surface is back-burned because welding is performed after coating. This is because if the backburn due to this welding is left unattended, the paint for corrosion prevention may disappear and the inside of the rudder may be corroded from the backburned portion.

[0006]

SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to provide a device capable of being internally painted after the rudder has been assembled without the need for an operator to enter the rudder.

[0007]

SUMMARY OF THE INVENTION According to claim 1, the invention comprises an element for transporting a charge-loaded paint to a paint compartment of an object, and an element for spraying the paint carried by said element. An apparatus for painting an object is provided, characterized in that the object comprises an element for applying an opposite electric charge to the paint.

According to the present coating apparatus, the paint is loaded with an electric charge, the paint compartment is charged with an electric charge opposite to that of the paint, and the paint is sprayed in the paint compartment so that the paint is uniformly applied to the compartment. be able to. A substance having a charge and a substance having an opposite charge have a property of attracting each other. According to the present device, by utilizing this property, it is possible to reach the coating section even if the paint is sprayed from a remote position without directly accessing the coating section.

According to a second aspect, the invention is a device for painting an object according to the first aspect, characterized in that the painting compartment of the object is sealed and pressure is applied. An apparatus for painting an object is provided.

According to this apparatus, the sprayed paint reaches the entire paint compartment by applying pressure to the closed paint compartment. When the pressure in the sealed object is increased, a force acts on the inner wall of the object. Therefore, the fine particles of the spray paint also tend to adhere to the inner wall of the object. According to this device, in addition to utilizing the property that the electrically charged paint easily adheres to the oppositely charged paint compartment as in the device according to claim 1 described above, further pressure is applied. By doing so, the paint is likely to adhere to the painted area.

According to claim 3, the present invention is an apparatus for painting an object according to any one of claims 1 or 2, wherein the paint compartment of the object supports an outer shell and Inside the rudder of a hull provided with a plurality of members for forming a plurality of layers therein, and further, the element that conveys to the coating section has a pipe portion that extends over all of the plurality of layers. ,
The piping section provides a device for painting an object characterized in that it comprises a plurality of holes so that the paint can be sprayed layer by layer.

According to the present apparatus, when the inside of the rudder of a hull in which a plurality of layers are formed by the support member that supports the outer shell is coated, the paint is sprayed in each coating section in the plurality of layers. It is supposed to be possible. Specifically, the pipe through which the paint is conveyed is installed so as to extend through each of the plurality of layers. The pipe is provided with holes for spraying paint in each layer. That is, according to the present device, the paint can be sprayed on each layer inside the rudder of the hull by simply carrying the paint through one pipe. Therefore, the distance over which the sprayed paint particles scatter until they adhere to the coating compartment can be greatly reduced compared to the case of the device according to any one of claims 1 and 2 above, and as a result, The inside of the rudder can be painted uniformly and sufficiently, and the waste of paint can be avoided.

According to claim 4, the present invention provides claims 1 to 3.
An apparatus for painting an object according to any one of claims 1 to 4, wherein the element that conveys to the paint compartment communicates with the paint compartment through a hole that connects the interior of the paint compartment and the exterior of the paint compartment. An apparatus for painting an object is provided.

According to this apparatus, the paint can be transported to the coating compartment by utilizing the hole provided for connecting the coating compartment and the outside. For example, when painting the inside of the rudder of the hull, the paint can be transported to the inside of the rudder by using a drain hole, an air hole, or the like provided as an essential element of the rudder of the hull. Therefore, according to the present apparatus, it is not necessary to separately provide a special element to the object forming the paint section in order to convey the paint to the paint section, and by adopting this apparatus, the manufacturing cost and manufacturing of the object forming the paint section can be reduced. It is possible to avoid an increase in labor.

Although the content of the present invention has been described above, the present invention will be more clearly understood by considering the drawings attached to the present specification and the following embodiments.

[0016]

1 to 3 illustrate an embodiment of the present invention, omitting some of the rudder components actually used to clarify the essence of the invention. ing. FIG. 1 is a cross-sectional view showing the inside of a rudder 10 of a hull schematically showing a first embodiment of the present invention. The rudder 10 is a hull,
It is supported by a rudder horn 11 integrated with the hull. Specifically, the rudder stock 16 rotatably connects the upper portion of the rudder 10 and the hull, and the pintle 18
Thus, the central portion of the rudder 10 and the rudder horn 11 are rotatably connected. Therefore, by rotating the end of the rudder stock 16 on the side of the hull, the rudder 10 moves under the sea to the rudder horn 11.
On the other hand, it rotates with respect to the hull and changes the propulsion direction of the hull.

The rudder 10 has a streamlined outer shell in the propulsion direction of the hull, and is provided with a plurality of support members inside so as not to be deformed even when it is rotated with respect to the rudder horn 11. To increase the strength. In the rudder 10 shown in FIG. 1, three plate members (hereinafter referred to as "webs") 12 in the vertical direction and eight plate members (hereinafter referred to as "arms") 14 in the lateral direction are provided as support members. I have it.

Referring to FIG. 2, there is shown a cross sectional view of the rudder 10 shown in FIG. 1, particularly along the arm 14a.
The arm 14a includes the webs 12a, 12b, 1 from the bow side.
1c is formed by the web 12a above and below the arm 14a. Further, the arm 14a is provided with two openings 22 so that a worker can enter during maintenance of the rudder 10 and connects the upper and lower sections of the arm 14a. However, the above-mentioned opening for entering the most stern-side compartment 24 is not provided, and it cannot be entered by other means. Therefore, after the rudder 10 is completed, the painting work cannot be performed in the compartment 24. This also applies to other stern-side compartments inside the rudder 10 and some other compartments.

For this reason, conventionally, a method has been employed in which the inside of the stern side is painted in advance before all the rudder outer shells are attached, and then the outer shells are welded. As described above, there is a problem that a part disappears and corrosion progresses from that part. Therefore, FIG.
Shows a device that can be internally painted without the worker entering the rudder after the rudder 10 is completed.

Specifically, as shown in FIG. 1, a pipe 26 that connects the inside of the rudder 10 to the inside of the rudder 10 is installed, and the rudder 10 is connected.
Transport the paint to the inside. The pipe 26 is provided with an air hole 28 and a drain hole 30 originally provided in the rudder 10.
The end portion is inserted into the rudder 10 by passing through. Therefore, the paint can be transported inside the rudder 10 without newly providing a dedicated opening. Also, the paint to be transported is charged with an electric charge.

Next, the power source 32 applies an electric charge opposite to that of the paint to the outer shell of the rudder 10. When a charge is applied to the outer shell of the rudder 10, not only the outer shell but also the internal members of the rudder such as the arm 14 and the web 12 connected to the outer shell are charged. This is because the inner member has electrical conductivity.

After the paint and the rudder 10 are thus charged with opposite charges, the paint is sprayed inside the rudder 10. The paint is sprayed through the spray hole 29 provided at the end of the pipe 26 inserted into the rudder 10 as described above, and the paint becomes fine particles and scatters inside the rudder 10. The scattered paint reaches and adheres to the inner surface of the rudder 10. Because the inner surface of the rudder 10 is charged with the opposite electric charge to the paint,
This is because substances with opposite charges attract each other. A nozzle is attached to the hole 29 through which the paint is sprayed. This is because the interior of the rudder 10 cannot be scattered unless the paint is made into fine particles and sprayed, and as a result, the paint cannot reach a position away from the spray hole.

The web 12 provided inside the rudder 10
The plurality of compartments formed by the arm 14 and the arm 14 respectively have openings 22 shown in FIG. 2 to allow the paint to pass through.
Besides, a plurality of small holes (not shown) are provided. Therefore, according to the coating apparatus shown in FIG. 1, even if the paint is sprayed at a position separated from the inner surface of the rudder 10 to be coated, the paint can naturally reach the inner surface, that is, every corner is coated. It will be possible

Further, the force of attracting the paint to the inner surface of the rudder 10 is constant according to the applied electric charge, so that when the paint exceeds a certain thickness, the force of attracting the paint further disappears and the paint does not adhere. Maintain a constant thickness. Therefore, according to this apparatus, the inner surface of the rudder 10 can be coated with a uniform thickness.

Further, in the coating apparatus shown in FIG.
Due to this, compressed air is applied to the inside of the rudder 10. Since the rudder 10 after the assembly is completed is kept in a sealed state so that seawater does not leak inside, the pressure inside the rudder 10 rises when compressed air is applied. As a result, the pressure acts toward the inner surface, so that the adsorbability of the paint is improved. The compressed air used here can be easily supplied by connecting the pipe 34 to the compressed air pipe normally provided in the hull.
In addition, in order to ensure the airtightness inside the rudder 10, the pipes 26, 34
A seal (not shown) is provided at a connecting portion between the steering wheel and the rudder 10.

In the coating apparatus shown in FIG. 1, the paint is sprayed using a pair of upper and lower pipes 26. However, additional paint is sprayed by additional pipes depending on the number of drain holes and air holes (not shown). It is preferable to allow it. This is because the inner coating of the rudder 10 can be performed sufficiently and quickly.

Next, referring to FIG. 3, a second embodiment of the present invention is illustrated as a modified example of the coating apparatus shown in FIG. Further, in FIG. 1, the rudder internally coated by the present apparatus is illustrated assuming that it is the same as the rudder 10 shown in FIG.

In the coating apparatus shown in FIG. 1, the charged paint is conveyed inside the rudder 10 by a pair of separated upper and lower pipes 26, but in the coating apparatus shown in FIG. Piping 4 formed integrally downward
The paint is transported by 2. As shown in FIG. 2, the rudder 10
The arm 14 provided inside and forming a plurality of layers inside the rudder 10 is provided with an opening 22 through which a worker passes during maintenance. Therefore, by using this opening 22, the pipe 42 can be arranged so as to pass through the plurality of arms 14. Further, the pipe 42 is provided with spray holes 44 located at the heights of the respective layers inside the rudder 10, as shown in FIG. Therefore, the charged paint is sprayed from the holes 44, and the oppositely charged rudder 1
It reaches and adheres to the 0 outer shell, arms and web surfaces.

Here, the pipe 42 for carrying the paint is preferably made of a flexible material such as a rubber hose. Piping 42
This is because it is possible to sufficiently deal with the case where the openings 22 provided in the respective arms 14 through which they pass are not aligned. Further, nozzles (not shown) for spraying fine particle paint are attached to the spray holes 44, respectively.

According to the coating apparatus shown in FIG. 3, since the coating material is sprayed for each layer, the sprayed holes 44 and the section to be coated approach each other. Therefore, even if the spraying force is weak, the coating material reaches the coating section sufficiently. If the paint is strongly sprayed, the area near the spray holes will be much thicker than the required coating thickness.
Although there is a possibility that unpainted paint may drip, this device solves such a problem because the spraying force can be limited by this device.

Further, according to the present apparatus, the paint sufficiently reaches the coating section even when the applied charge is weak. Therefore, the safety of the painting work can be improved.

Further, in the coating apparatus shown in FIG. 3, compressed air is applied to the inside of the rudder 10 through the pipe 34 as in the apparatus shown in FIG. As described above, this improves the adsorptivity of the coating material.

Further, in the coating apparatus shown in FIG. 3, one pipe 42 is used to spray the paint, but additional pipes may be provided depending on the number of drain holes and air holes (not shown). It is similar to the case of the coating apparatus of FIG. 1 that spraying is preferable.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various improvements and modifications can be made without departing from the concept and spirit of the claims. It will be apparent to one of ordinary skill in the art that there may be. For example, the coating may be applied not only to the interior coating of the rudder of the hull but also to a location where it is difficult for workers to enter due to space or safety issues.

[0035]

The coating apparatus of the present invention is provided with a charged paint, a pipe for spraying the paint into the rudder, and a power supply for loading the outer shell of the rudder with a charge opposite to that of the paint. In this coating method using this coating device, a paint with a charge is sprayed inside the rudder and the opposite charge is applied to the outer shell of the rudder so that the paint scattered inside the rudder is uniformly attached to the inner surface of the rudder. be able to. Therefore, according to the present invention, the paint can be applied to the area near the stern of the rudder, which is difficult for the worker to enter, and as a result, the corrosion of the rudder can be prevented.

Further, according to the present invention, since pressure can be applied to the inside of the rudder, the adsorption of the paint can be improved and the paint can be sufficiently adhered to the entire inside of the rudder.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of the inside of a rudder showing one embodiment of a coating apparatus of the present invention.

FIG. 2 is one of a plurality of arms that make up the inside of the rudder shown in FIG.
It is a schematic plan view showing one.

3 is a sectional view of the inside of the rudder showing another embodiment of the coating apparatus shown in FIG. 1. FIG.

[Explanation of symbols]

10 ... Rudder 11 ... Ladder horn 12 ... Arm 14 ... Web 16 ... Ladder stock 18 ... Pintle 22 ... Opening 26, 34 ... Piping 28 ... Air hole 30 ... Drain Hall 32 ... Power supply

Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B63B 59/04 B63B 59/04 Z B63H 25/38 B63H 25/38 Z

Claims (4)

[Claims] 1. An element for conveying a charged paint to a paint compartment of an object, an element for spraying the paint conveyed by the conveying element, and an element for charging the object with an electric charge opposite to that of the paint. An apparatus for painting an object, comprising: 2. An apparatus for painting an object according to claim 1, wherein the painting compartment of the object is sealed and pressure is applied. 3. The paint compartment of the object is a rudder of a hull provided with a plurality of members for supporting an outer shell and forming a plurality of layers therein, and further, an element for carrying to the paint compartment is A pipe portion extending over all of the plurality of layers, the pipe portion having a plurality of holes for spraying the paint for each layer. An apparatus for painting an object according to any one of 2 above. 4. An element for transporting to the paint compartment communicates with the paint compartment through a hole that connects the interior of the paint compartment with the exterior of the paint compartment. An apparatus for painting the object according to item 1.