JPH07213959A - Work coating device - Google Patents

Abstract

PURPOSE:To greatly lessen the exchange frequency of a sheet part while preventing stains of a coating compound on a device main body by forming an insulating space between the sheet part and the surfacial parts of the device main body by covering the surfacial parts of the device main body with an insulating sheet part while placing air holding parts between them. CONSTITUTION:A sheet part 11 which is characteristic in this device is produced from an insulating sheet material having flexibility. While air holding parts 15 being placed between the surfacial parts 2S1, 2S2 of the device main body 1 near an electrostatic coating apparatus 6 as to form an insulating space 19, the surfacial parts 2S1, 2S2 are covered with the sheet part 11. The air holding parts 15 are also formed of an insulating material. Since the insulating space 19 is formed between the sheet part 11 and the side faces 2S1, 2S2 of the device main body 1 in this way, the sheet part 11 never has the same potential as the device main body 1. Furthermore, the sheet part 11 can prevent from the stains with a coating compound for a long duration due to the insulating space 19 even if the sheet part 11 is not thickened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work coating apparatus equipped with an electrostatic coating machine to which a high voltage is applied and having a grounded apparatus body.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show a conventional structure of a work coating apparatus for electrostatically coating a work such as an automobile body. In these figures, reference numeral 1 is the apparatus main body. Device body 1
Is made of metal from the viewpoint of structural strength. Also,
An arm portion 9 is provided on the side surface of the apparatus body 1 so as to be movable along the guide groove 5, and an electrostatic coating machine 6 is attached to the tip of the arm portion 9. The electrostatic coating machine 6 has a paint spraying unit 8 capable of spraying the supplied paint and a charging unit 7 capable of charging (negatively charging) the atomized paint.

Further, the apparatus main body 1 includes an electrostatic coating machine 6
A high-voltage supply device (not shown) for supplying a high voltage (for example, -90 kV) to the charging section 7 is provided, and the device body 1 is grounded. An opening 3 is formed on a predetermined side surface (for example, the side surface 2S) of the apparatus body 1 for convenience during internal inspection and repair, and the opening 3 is covered with a lid member 4.

For example, when electrostatically coating the automobile body 40, a high voltage (-90 k) is applied to the charging section 7 of the electrostatic coating machine 6.
V) is applied, the work W is grounded, and the paint is sprayed from the paint sprayer 8. Then, the arm portion 9
The electrostatic coating machine 6 is appropriately moved along the guide groove 5 so that the distance from the vehicle body 40 becomes a predetermined coating distance (for example, 300 mm). Then, the paint particles sprayed from the paint spraying unit 8 of the electrostatic coating machine 6 collide with the negative ions generated in the charging unit 7 to be negatively charged, and the charging unit 7 and the work W
Coulomb force acts on the vehicle body 40 by an electrostatic field formed between the vehicle body 4 and
Adsorbed on the surface of 0. As a result, a coating film is formed on the automobile body 40.

By the way, in the above-mentioned work coating apparatus, the arm portion 9 tends to be shortened in order to improve the movement performance and downsize the apparatus.
The charging section 7 is separated from the surface (side surface 2S, etc.) of the apparatus body 1 in the vicinity by only the coating distance (300 mm), and the apparatus body 1 is grounded. Therefore, the paint oversprayed from the paint spraying section 8 of the electrostatic coating machine 6 may be sucked and adsorbed on the surface of the apparatus main body 1.

When such a situation occurs, the paint particles enter inside through the gap between the opening 3 of the apparatus body 1 and the lid member 4, the guide groove 5 and the like, which adversely affects the built-in equipment such as the high voltage supply apparatus. Or, the motion performance of the arm portion 9 is deteriorated, so that the smooth coating cannot be performed.

Therefore, conventionally, the surface (particularly, the side surface) of the apparatus main body 1 is an insulating sheet member (for example, vinyl having a thickness of 0.3 to 0.5 mm) as indicated by a chain double-dashed line in FIG. Sheet) 11P is used for coating. This prevents the apparatus body 1 from being soiled with paint.

[0008]

However, in the work coating apparatus described above, the sheet member 11P has the same potential (earth potential) as the apparatus main body 1 during electrostatic coating, and the sheet member 11P has a short period of time. A large amount of paint easily adheres inside. In particular, when a large work such as an automobile body is continuously coated, the paint stains within a shorter period of time.
Therefore, it is necessary to frequently replace the sheet member (11P), which is troublesome.

In order to solve such a problem, it is conceivable to make the sheet member 11P particularly thick so as to enhance the insulation ability. However, since this increases the weight of the sheet member 11P and reduces the flexibility, the sheet member 11P is concerned. It takes a lot of time to cover the side surface of the apparatus main body 1 while bending 11P appropriately, which causes a problem in handling.

In view of the above circumstances, an object of the present invention is to provide an easy-to-handle work coating apparatus capable of significantly reducing the frequency of replacement of sheet members while preventing the paint stain on the apparatus main body.

[0011]

A work coating apparatus according to the present invention is a work coating apparatus equipped with an electrostatic coating machine and having a grounded apparatus body, and at least the surface of the apparatus body near the electrostatic coating machine. It is characterized in that the portion is covered with an insulating sheet member via a space holding member to form an insulating space between the sheet member and the surface portion of the apparatus main body.

[0012]

In the present invention having the above-described structure, a high voltage (for example, -90 kV) is applied to the electrostatic coating machine to charge the spray coating material, and the work is grounded for electrostatic coating.

At this time, since an insulating space is formed between the sheet member and the surface of the apparatus main body near the electrostatic coating machine,
Even if the sheet member is thin, it does not have the same potential (earth potential) as the main body of the apparatus, and even if negative ions generated from the electrostatic coating machine adhere to the sheet member, they are prevented from escaping to the ground. . Therefore, even if paint particles oversprayed from the electrostatic coating machine fly toward the sheet member, they are effectively prevented from being repelled by the negative ions on the sheet member and adsorbed.

As a result, it is possible to prevent the sheet member from being soiled with the paint for a long period of time, and it is possible to greatly reduce the replacement frequency. Further, since it is not necessary to make the sheet member thick, it does not take time and effort to cover the main body of the apparatus, and the handling is easy.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, this work coating apparatus has a basic configuration similar to that of the conventional example (FIGS. 4 and 5), and an insulating sheet member 11 is held in space on the surface of the apparatus main body 1. The sheet member 11 is covered with the member (15) so as to form an insulating space 19 between the member and the sheet member (15) so that the sheet member 11 can be prevented from being soiled with paint for a long period of time. . The same components as those of the conventional example (FIGS. 4 and 5) are designated by the same reference numerals, and the description thereof will be omitted or simplified.

First, the sheet member 11, which is a characteristic part of the present work coating apparatus, is made of a flexible insulating sheet material having a thickness of 1 mm or less, and the surface of the apparatus main body 1 near the electrostatic coating machine 6 is covered. The surface portion (2S) is provided on the portion (side portions 2S1, 2S2 in this embodiment) via the space holding member 15.
1, 2S2) so that an insulating space 19 is formed between them. In this embodiment, the sheet member 1
1 is made of resin vinyl having flame retardancy (for example, trade name "Achilles fullere"). The space holding member 15 is made of an insulating material. More specifically, the space holding member 15 is made of a non-conductive material (for example, Delrin, PP, PET) and has a diameter of 9 in a continuous shape.
It is formed from a round bar of mm.

Therefore, when a predetermined number (six) of space holding members 15 are attached to predetermined portions of the side surfaces (2S1, 2S2) of the apparatus main body 1, and the sheet member 11 is stretched from above the members 15, An insulating space (air layer) 19 having a thickness of about 10 mm is formed between the side surfaces (2S1, 2S2) and the sheet member 11.

Next, the operation of this embodiment will be described. A high voltage (-90 kV) is applied to the charging section 7 of the electrostatic coating machine 6 to negatively charge the paint sprayed from the paint spraying section 8 and the automobile body 40 as a work is grounded for electrostatic coating.

At this time, since the insulating space 19 is formed between the sheet member 11 and the side surfaces (2S1, 2S2) of the apparatus body 1, the sheet member 11 has the same potential (earth potential) as the apparatus body 1. Therefore, even if the negative ions generated from the charging section 7 are attached to the sheet member 11, they are prevented from escaping to the ground. Therefore, even if the paint particles oversprayed from the spray section 8 of the electrostatic coating machine 6 fly toward the sheet member 11, they are effectively prevented from being repelled by the negative ions on the sheet member 11 and adsorbed. To be done.

As a result, it is possible to prevent the sheet member 11 from being soiled with paint for a long period of time, and the replacement frequency can be greatly reduced. In addition, the sheet member 11
Has a thin thickness of 1 mm or less and is highly flexible, so that it does not take time and effort to cover the side surfaces (2S1, 2S2) of the apparatus body 1 and is easy to handle.

According to this embodiment, however, the side surfaces (2S1, 2S2) of the apparatus body 1 are covered with the insulating sheet member 11 via the space holding member 15, and the sheet member 11 and the apparatus body 1 are covered. Since the insulating space 19 is formed between the side surfaces (2S1, 2S2), it is possible to significantly reduce the frequency of replacement of the sheet member 11 while preventing paint stains on the apparatus body 1. In addition, the ease of handling is not reduced.

Further, since the space holding member 15 is made non-conductive, the device body 1 and the sheet member 11 can be completely insulated, and the sheet member 11 can be prevented from being soiled with paint for a longer period of time. As a result, the frequency of replacement can be dramatically reduced. Further, since the space holding member 15 is formed into a round bar shape, even if the sheet member 11 is tightly covered,
An excessive force is not locally applied to the contact portion with the space holding member 15, and the space holding member 15 is not damaged. Therefore, also from this point, the long-term use of the sheet member 11 can be ensured, the frequency of replacement can be drastically reduced, and the handleability can be improved.

Further, since the side surface (2S1, 2S2) of the apparatus main body 1 is not tightly covered with the sheet member 11, the sheet member 11 can be replaced more quickly and easily.

Although the space holding member 15 is formed of a non-conductive (insulating) round bar in the above-mentioned embodiment, the paint is applied to the portion directly contacting the member 15 even if it is conductive and its periphery. However, the number of times of replacement can be effectively reduced because the adhesion points and the adhesion amount are smaller than the whole.

Further, the side surfaces (2S1, 2S) of the apparatus main body 1 are
Not only 2) but also the other side surfaces (2S3, 2S4), and further the upper surface may be covered with the sheet member 11 via the space holding member 15.

Further, the space holding member 15 has a continuous round bar shape, but is not limited to this. For example, as shown in FIG. 3 (A), a large number of blocks having a discontinuous shape (here, round bar pieces). You may form more. As a result, the space holding member 15 is shortened, and handling including storage and the like becomes much more convenient.

Further, as shown in FIG. 3 (B), the space holding member 15 is attached to the surface of the apparatus main body 1 [for example, side surfaces (2S1, 2S1, 2S1).
S2)] is formed from a protrusion integrally formed with a predetermined plurality of parts, and the apparatus body surface (2S1, 2S2) is covered with the sheet member 11 through the protrusion (15) to form the sheet member 1
An insulating space 19 may be formed between 1 and the surface of the apparatus body (2S1, 2S2). As a result, the surface of the main body (2S1, 2S2) of the sheet member 11 can be more quickly and easily.
It is possible to coat with, and it becomes easier to handle.

Further, as shown in FIG. 3 (C), the sheet member 11 is replaced by the air bubble portion 1 having the function of the space holding member (15).
5'is formed from a sheet material provided with a large number, and the sheet material (1
The device body surface (2S1, 2S2) may be covered with 1) to form the insulating space 19 between the sheet material (11) and the device body surface (2S1, 2S2). As a result, the side surfaces of the device body (2S1, 2S2) can be more quickly and easily.
Can be covered with the sheet material (11), which makes it easier to handle.

[0029]

As described above, according to the present invention, at least the surface of the main body of the apparatus near the electrostatic coating machine is covered with the insulating sheet member through the space holding member, and the sheet member and the surface of the main body of the apparatus are covered. Since the insulating space is formed between the sheet member and the portion, it is possible to prevent the sheet member from being soiled with paint for a long period of time without thickening the sheet member. As a result, the frequency of replacement of the sheet member can be greatly reduced while preventing the paint stain on the main body of the apparatus. In addition, it is possible to prevent the ease of handling from decreasing.

[Brief description of drawings]

FIG. 1 is a perspective view for explaining an embodiment of the present invention.

FIG. 2 is a plan view for explaining the positional relationship among the sheet member, the space holding member, and the side surface of the apparatus main body.

FIG. 3 is also a diagram for explaining a modified example of the space holding member.

FIG. 4 is a perspective view showing a conventional configuration of a work coating device.

FIG. 5 is a plan view of the same.

[Explanation of symbols]

 1 Device main body 6 Electrostatic coating machine 11 Sheet member 15 Space holding member

Claims (1)

[Claims] 1. A work coating apparatus equipped with an electrostatic coating machine and having a grounded apparatus main body, wherein at least the surface of the main body of the apparatus near the electrostatic coating machine is insulated by a space holding member. A work coating apparatus, which is covered with a member to form an insulating space between the sheet member and a surface portion of the apparatus main body.