JPH04190864A - Painting hanger - Google Patents

Abstract

PURPOSE:To obtain a painting hanger made hard to generate the adhesion of a powder and capable of earthing an object to be painted by a method wherein a conductive core material is wrapped by an elastomer or sponge having a conductive powder dispersed therein at least on the side of the object to be painted and electrically shielded from the circumference when the object to be painted is not suspended. CONSTITUTION:The intermediate part of a conductive core material 11 is covered with an insulating film 2 and the end part thereof is covered with a sponge body 3 having a conductive powder 3b dispersed therein. The circumference 3c of a hanger is in an insulating state with respect to the conductive core material 1. The foamed part 3a of the sponge body 3 is deformed by the load of an object 9 to be painted and the conductive powder 3b is brought to a mutual contact state or the conductive powder 3b and the conductive core material 1 are brought to a contact state and, as a result, only the part receiving load becomes a conductive state and the object 9 to be painted becomes an earthed state. The circumference of the sponge body 3 at the other part receiving no load also becomes an insulated state. When the object 9 to be painted is detached and load is eliminated, the sponge body is restored to the original shape. By this method, the sponge body can be replaced corresponding to the kind or wt. of the object to be painted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a hanging tool for suspending an object to be coated in electrodeposition coating or electrostatic coating.

[Prior art]

Conventionally, hanging devices for suspending objects to be coated were made of bare metal wires, and when conductivity was impaired by adhered paint, the adhered paint was removed mechanically or by baking.

[Problem that the invention seeks to solve]

Grounding the object to be coated is necessary to maintain the quality of the coating.
It is essential. However, like the objects to be coated, the hangings are coated with paint and then baked in a furnace, so it is not easy to maintain their grounding function continuously. SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide a painting hanger that is difficult to attract powder and can ground the object to be painted.

[Means to solve the problem]

In the hanging device of the present invention, at least the end portion of the conductive core material on the side to be coated is covered with an elastic body or a sponge-like substance containing conductive powder dispersed therein. Note that the conductive powder according to the present invention includes fibrous powder in addition to granular powder.

[For production]

In this hanging tool of the present invention, when left unloaded, the conductive powder is dispersed in the elastic body or sponge body, and the whole becomes an insulator. When the object to be coated is suspended, only the part that receives the load elastically deforms or bends, and the conductive powder that was previously separated - or the conductive powder and the conductive core material - come into contact and become partially conductive, resulting in The object to be coated will be grounded.

It goes without saying that the material used for the coating, such as the elastic body or sponge body, must maintain heat resistance when it is baked as is after painting.

〔Effect of the invention〕

In the hanging tool of the present invention, the part where the object to be coated is suspended and is under load is in a conductive state, and the other part, which is not under load, is in an insulating state. In a painting shop, most of the charged coating particles that fly towards the object to be coated stick to the grounded object, but some of the remaining particles reach near the surface of the hanger. However, since the surface of the hanging tool is not grounded, there is no attraction effect, and on the other hand, because it is electrically insulated, the charge of the charged coating particles that initially adhered cannot escape, and because they have the same polarity, they repel and cause further damage. There is no adhesion. In the example of claim 2, the amount of adhesion can be further reduced by blowing air from inside the hanger to scatter the adhering powder. In addition, the air intake and exhaust on the surface of the hanging device is effective in removing stuck paint,
By blowing out a small amount of cooling air, the seizure also has the effect of helping to thermally protect the elastic body and sponge body inside. Furthermore, as can be easily imagined by those skilled in the art, by making at least the end of the conductive core material on the side of the object to be coated removable, it is possible to replace it depending on the type and weight of the object to be coated. have

〔Example〕

In the example shown in Fig. 1, only a part of the tip of the hanging device is shown, and the middle part of the conductive core material (1) is coated with an insulating film (2), and the end part is mixed with a conductive powder (3b) dispersed therein. Sponge body (
3). In order to explain the cross section of the hanging device in detail, the foamed part (3a) of the sponge body (3) is shown as many small circles, and the conductive powder (3b) is shown as black dots, and its wall thickness is also relatively thick. I'm drawing. FIG. 1 shows a state in which no object to be coated is hung, and the periphery (3c) of the hanging tool is insulated from the conductive core material (1). On the other hand, FIG. 2 shows a state in which the object to be coated (9) is hung on the hanger shown in FIG. The sponge body (
3) The foamed parts (3a) etc. are deformed and the conductive powders (3b) come into contact with each other or the conductive powders (3b) and the conductive core material (1), and as a result, only the part that receives the load becomes conductive.
This shows that the object to be coated (9) is in a grounded state. The area around the other sponge body (3) that is not under load is also in an insulated state. When the object to be coated (9) is removed and the load is removed, it restores to its original shape. - [Another embodiment] Figure 3 shows an example using a bendable cylindrical elastic body (4),
Although not illustrated, one embodiment is shown in which only the contacts are electrically conductive when the object to be coated is suspended, and are electrically insulated at other times. That is, a cylindrical elastic body (4) is fixed to the tip of the hanging tool so that it can be held by covering the conductive core material (1) at a certain distance around the conductive core material (1) like a balloon. There are 7.

A conductive powder (4b) is dispersed and mixed in the elastic body (4), and the membrane is formed into a thin film so as to be conductive between both sides.

It is also effective to provide a protrusion (4c) on the inner surface to stabilize the support of the cylindrical elastic body (4) and to facilitate restoration when the object to be coated is removed. Although the explanatory diagram is omitted, when the object to be coated is suspended, the cylindrical elastic body (4) is bent as a whole, and the conductive core material (1) and the object to be coated bend in the elastic body (4) in the vicinity where the object to be coated comes into contact.
).

As described above, the elastic body (4) subjected to the load is electrically conductive between both surfaces, so that the object to be coated is grounded.

(Another Embodiment) FIG. 4 shows one embodiment of claim 2. That is, the ground side of the pipe-shaped conductive material (6) communicates with the small hole (6a) at the end of the object to be coated, and although the introduction method is omitted, the air (7) is It is ejected from the surface of the sponge body (3) through the hole (6a) as shown by the arrow (7a). Also, although not shown, a sponge body (3
) is not spongy and has no air permeability, or if it has very little air permeability, the surface of the sponge body (3) will be reduced and deformed by the depressurizing action of the suction air (7b).

(Another Example) FIG. 5 shows an example in which the end portion of the conductive core material (1) is made detachable. In the figure, a sponge-like example is shown, but it may be made of an elastic body, and it is also possible to make it suitable for use as a conductive pipe material.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view of a painting hanger according to an embodiment of the present invention, and FIG. 2 is a partial cross-sectional view of the painting hanger according to the embodiment shown in FIG. 3 to 5 are partial cross-sectional views of painting hangers according to other embodiments, respectively.

Claims (1)

[Scope of Claims] 1. A hanging tool for suspending and simultaneously grounding an object (9) to be coated in connection with electrodeposition coating or electrostatic coating, the conductive core material (1
) at least on the side of the object to be coated is wrapped with an elastic body (4) or sponge body (3) containing conductive powder (3b) dispersed therein, and when the object to be coated (9) is not suspended, the conductive core material (1) is wrapped. When the object to be coated (9) is electrically shielded from the surroundings and suspended, the part of the object to be coated (9) that receives the load will be elastically deformed or bent, and the conductive core material (1) and the coated object will be elastically deformed or bent. A painting hanger characterized in that the coating material (9) is electrically conductive. 2. Claim 1, characterized in that air is allowed to enter and exit from the ground side of the pipe-shaped conductive tube material (6), and is communicated to the elastic body (4) or sponge body (3) at the end on the side of the object to be coated. Painting hanger as described.