JPH0348213Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a paint for the main parts of the object to be painted, which reliably prevents the paint from being applied to the electrical connection parts of the object to be painted, such as the case of a transformer. This invention relates to a smear prevention device.

[Conventional technology]

Recently, electric coating has been adopted as an undercoat treatment for coating objects that require a high degree of corrosion resistance.This electric coating involves applying an electrolytic coating solution made of water-soluble resin paint to the coating object. The object to be painted is used as one electrode, and a direct current is applied between the other electrode provided in the electrodeposition paint tank to deposit the resin paint on the surface of the object to be painted and form a coating film. It is a coating that forms.

For example, in cases used for power distribution pole equipment such as transformers and switches, the above-mentioned electrodeposition coating has come to be used as an undercoat treatment in order to improve corrosion resistance and weather resistance. Regarding electrodeposition coating of these cases, for example, JP-A-61
An example of a transformer case is shown in No. 210200, and its schematic structure will be explained with reference to FIGS. 3 and 12. That is, after removing rust from the inside and outside of the case 1, as shown in FIG. Device 6
The case 1 is hung from the hanging fitting 7 with the bottom side slightly raised compared to the head side. Conveyor device 6
12, the case 1 is moved in the direction of the arrow in FIG. 12, and is sequentially subjected to degreasing, pure water showering, drying, etc., and then transported to the electrodeposition coating device 8 as shown in FIG. . This electrodeposition coating device 8 has a third
As shown in the figure, a paint tank 10 filled with electrodeposition paint 9
and a power supply rail 11 installed in parallel to the conveyor device 6.
, an electrode 12 disposed in the paint tank 10 , and a cable 1 connected to the DC power supply 13 at one end and the power supply rail 11 and the electrode 12 at the other end.
4 and 15, and when applying the undercoat to the case 1, the case 1 that has undergone the above-mentioned pretreatments is sequentially conveyed by the conveyor device 6 to the electrodeposition coating device 8 as shown in FIG. When the case 1 is conveyed to this point, the case 1 suspended from the conveyor device 6 is sequentially immersed into the electrodeposition paint 9 from the left side of FIG. 3 with the bottom surface of the case 1 first. Then, when completely immersed, the DC power supply device 13 → cable 14 → power supply rail 11 →
Electric brush 16 attached to hanging fixture 7 → hanger 4, hanging chain 5 → case 1 → electrodeposition paint 9 → electrode 12
A DC current flows through the path of →cable 15→DC power supply 13, and the charged electrocoating paint 9 is electrically applied to the inner and outer peripheral surface of the case 1 as it moves horizontally within the electrocoating paint 9. It adheres and is electrodeposited.
After completing the undercoating process for case 1 in this way, a top coat is applied to the outer peripheral surface of case 1 that has been electrocoated using an electrostatic coating device, a spray coating device, etc. to paint case 1. It was being processed.

[The problem that the idea aims to solve]

However, when performing the undercoating and topcoating, if the object to be coated is, for example, the case 1 of the transformer, the case 1 has a hanger seat 2 on its outer surface, as shown in FIG. 1A. , 3, a protective cover 17 for the bushing, a lifting and tightening seat 18, and a grounding terminal 20 are provided protrudingly. Since the electrodeposition coating is carried out by applying the electrodeposition coating, the inner part of the case 1 which is not exposed to the surface can be sufficiently coated with the undercoat. However, as shown in FIGS. 1A and 1B, the ground terminal 20 attached to the lower part of the surface of the case 1
has an insertion hole 22 for the ground wire 21, and a hole 22 for the ground wire 21.
A screw hole 24 for a tightening screw 23 for fastening 1 to the grounding terminal 20 is bored, and these holes 22, 2
If the 4 part is not covered by some means, a paint film will form and the grounding wire 21 will not be able to be inserted, or even if it can be inserted, the paint film will prevent it from connecting to the ground terminal 20. It was not possible to establish a good connection. For this reason, it is necessary to wrap adhesive tape around the circumferential surface of the ground terminal 20 or use a plug to close the hole portion 20.
2 and 24, but in the former case, the adhesive on the tape melts during degreasing or electrodeposition, and most of the tape itself peels off, making it unable to function as a blocker. Each time the painting process is performed,
Since the plugs were attached to and removed from the hole portions 22 and 24 one by one, it was time-consuming to do so, or they could fall off due to vibration during transportation, for example, blocking the nozzle for spouting the solvent in the paint tank 10. In addition, handling the capper is time-consuming and requires extreme care, as it makes electrodeposition coating difficult.

In view of the above-mentioned problems, the present invention prevents the formation of a paint film on the electrically connected parts during the painting process by watertightly sealing the electrically connected parts of the object to be painted in a state close to one movement. The present invention relates to a paint adhesion prevention device characterized by:

[Means to solve the problem]

The present invention involves bending a steel wire with spring properties, such as a piano wire, into a mountain shape, intersecting the ends of the bent pieces in an X shape, and then bending them inward into a U-shape. A spring clip is formed, and a pair of ear plugs molded into a truncated cone shape and having excellent heat resistance and elasticity are fixed to the opposing prongs of the spring clip, with the small diameter sides facing each other, and A spring clip equipped with a stopper is clamped in close contact with an electrically connected portion protruding from the outer surface of the object to be coated so as to be removable, thereby preventing a paint film from being formed on the electrically connecting portion due to intrusion of paint. The present invention relates to a paint adhesion prevention device characterized by preventing paint adhesion.

[Effect]

This invention is designed to install earplugs from both sides of the grounding wire insertion hole of the grounding terminal, which is used when painting objects such as transformer cases, where paint enters and forms a coating film that makes electrical connection impossible. The space between the ear plugs of the spring clip provided is pushed apart, and the ear plugs are fitted and clamped by the spring pressure of the spring clip to tightly close the insertion hole for the ground wire, and the tightening screw of the ground terminal is tightened. When applying electro-deposition as an undercoat to the threaded hole, a conductive latch is screwed onto the screw hole, and when applying the topcoat, a removable plug of the same quality as an earplug is press-fitted. The present invention is characterized in that when painting an object to be painted, a coating film is prevented from being formed in the insertion hole of the ground terminal, and a ground wire can be connected to the ground terminal in an electrically energized manner.

[Example] Hereinafter, an example of the present invention will be described with reference to FIG. 2 and FIGS. 5 to 11. In addition, Figures 2 and 5
The same reference numerals shown in FIGS. 1 to 12 and in FIGS. 1, 3, and 12 indicate the same parts.
Further, an example in which the present invention is applied to a case of a distribution transformer as an object to be coated will be explained.

4 to 6, the structure of the coating prevention device of the present invention that prevents paint from penetrating into the ground terminal 20 and forming a coating film during the undercoating of case 1 will be explained as follows. 4 shows a spring clip, and this spring clip 25 is provided with a locking portion 26 by bending a metal member such as a steel wire having spring properties into a small diameter circle, and the end extending from the locking portion 26 is shown in FIG. As shown in FIG.
are formed integrally with the operating section 27, and the extending ends of the steel wires are further extended to the side of the operating section 27 while intersecting in an X shape, and the end portions are connected to the operating section 27 as shown in FIG. The spring clip 25 integrally includes the locking part 26, the operating part 27, and the clamping part 28 by bending them in a U-shape in directions facing each other to form the clamping part 28. Reference numeral 29 denotes earplugs to be attached to the spring clip 25, which are made of a material with excellent heat resistance and elasticity, such as silicone or fluororesin, and are formed into a truncated conical shape. Then, the small-diameter ends that fit into the insertion holes 22 of the ground terminals 20 are made to face each other, and the opposite large-diameter ends are fastened to the holding portions 28 of the spring clips 25 so as not to come off. do. Reference numeral 30 denotes a conductive latch fitting that is screwed into the screw hole 24 of the ground terminal 20, and an engagement hole 31 that engages with the hook part 4a of the hanger 4 is bored as shown in FIGS. The plate-like part 32 and this plate-like part 32
A threaded portion 33 is welded to one side, and during electrodeposition coating, the threaded portion 33 is screwed into the screw hole 24 of the ground terminal 20 to prevent paint from entering the insertion hole 22.
It serves as a conductive terminal during electrodeposition coating, and as shown in FIG.
A protrusion 31a having a sharp tip is integrally provided around the circumference.

Next, a case in which electrodeposition coating is performed as the undercoating process in case 1 will be described.

Before hanging the case 1 on the conveyor device 6, attach the conductive latch 30 to the screw hole 2 of the ground terminal 20 provided at the bottom of the case 1 using its threaded part 33.
Screw on 4. After this, as shown in Figure 2,
The latching portion 4a of the hanger 4 is engaged with the engagement hole 31 of the latching fitting 30, and the suspension chain 5 is attached to the lifting/clamping seats 18, 18 on the head side of the case 1 or the mounting hole of the bushing (not shown). The rod-shaped hanger 34 is hung by hanging or wrapping around the two hangers 4,
34 is hung from the hanging fitting 7 of the conveyor device 6,
As shown in FIG. 2, the case 1 is suspended on the conveyor device 6 with the bottom slightly raised and laid down on its side. In this state, if you hold the spring clip 25 in your hand and press the operating parts 27 in the direction in which they can be pinched together as shown in FIG. . That is, the interval between the earplugs 29, 29 is widened. In this way, by operating the spring clip 25, the earplugs 29, 29 are attached to the fourth earplugs 29 on both sides of the insertion hole 22 of the ground terminal 20.
When the earplugs 29, 29 are approached as shown in the figure and the pressure on the operating section 27 is gradually released, the small diameter side of the earplugs 29, 29 can be tightly fitted into the insertion hole 22, as shown in FIG. After confirming that the earplugs 29, 29 have been fitted into the insertion holes 22, and removing the hand from the operating section 27,
The spring clip 25 has its own spring action.
As shown in the figure, the ear plugs 29 can be attached to the ground terminal 20 in a state where they are fitted into the insertion holes 22 of the ground terminal 20. By attaching the earplugs 29, 29 and the hook 30 to the ground terminal 20 in this manner, the insertion hole 22 is completely sealed from the outside, and no paint film is formed due to intrusion of paint. Attach the spring clip 25 to the ground terminal 20 as described above.
After installing, by driving the conveyor device 6,
In case 1, as in the past, electrodeposition coating is performed after pretreatment such as degreasing, pure water showering, and drying. Note that since the case 1 is suspended on the conveyor device 6 via the hangers 4 and 34, the case 1 is conveyed while swinging like a swing during conveyance.
The hook part 4a at the lower end of the hanger 4 that engages with the hanger 4 is constantly in sliding contact with the sharp protrusion 31a provided in the engagement hole 31, so that paint adhering to this part can be peeled off smoothly and well. Can be used during electrodeposition coating,
The case 1 can be energized satisfactorily.
Furthermore, since the insertion hole 22 of the grounding terminal 20 is completely sealed with an ear plug 29 that utilizes the spring action of the spring clip 25, the case 1 is fully immersed in the electrodeposition paint 9 and the electrodeposition coating is applied. Even if you do this, the ground terminal 2
No coating film is formed within the area.

Next, the case of applying top coat will be explained. Since the top coat is applied only to the outer surface of the case 1, the case 1 is stood up and attached to the conveyor device 6 by a hanging chain 35, as shown in FIG.
be hung on. In this case, the latch fitting 30 screwed onto the ground terminal 20 is temporarily removed from the ground terminal 20 in order to prevent the paint film from becoming thicker due to adhesion of the top coat. Then, as shown in FIGS. 9 and 10, a truncated cone-shaped plug 36 made of the same material as the earplug 29 is inserted into the screw hole 24 of the ground terminal 20 from which the latch 30 has been removed. A portion is press-fitted so as to be screwed into the threaded part of the screw hole 24, and in this state, the conveyor device 6 is driven to convey the case 1 to a top coating device (not shown), and the top coat is applied to the outer surface of the case 1. Spray and apply top coat. In this case as well, since the spring clip 25 and plug 36 are attached to the ground terminal 20, paint will not enter the ground terminal 20 and form a coating film.

When each painting process of undercoat and topcoat is completed, as shown in FIG. By pressing in the direction of the arrow, the earplugs 29, 29 are pulled out from the insertion hole 22 of the ground terminal 20 in one motion.

In addition, when applying the top coat to the case 1, there is no need to remove the latch 30 screwed onto the ground terminal 20.
Of course, top coating may be applied while the screws remain screwed together.

Furthermore, although the present invention has been described with reference to an embodiment that prevents paint from entering the grounding terminal 20 of the transformer case 1, the present invention is not limited to this, and can be applied to cases equipped with a grounding terminal, including the case of a pole-mounted switch. In addition to being applicable to all things, other than ground terminals, it can also be applied to members that protrude from the outer surface of the object to be painted, and where defects may occur due to the formation of a coating film inside the member. Not even.

[Effect of idea]

Since the present invention is configured as described above, it has the following effects.

(1) A grounding terminal protruding from the outer surface of the object to be painted shall be
The spring action of the spring clip allows the earplugs to be attached and detached with a single touch, making it possible to quickly and reliably attach and detach the earplugs, even during conveyor work where objects to be coated are hung on a conveyor and transported. can.

(2) Also, when applying electrodeposition to the object to be painted, the latching metal fitting that is screwed into the screw hole of the ground terminal is used not only to prevent paint from entering, but also to suspend the object to be painted and to use the terminal metal fitting when energizing. In addition, a sharp protrusion is provided around the engagement hole where the hanger engages, and the vibration generated during transport of the case is used to remove the paint at the sliding contact area with the hanger. Since it is configured so that it can be easily peeled off, the electrodeposition coating process of the object to be coated can be carried out smoothly and favorably.

(3) Furthermore, the spring clip can be easily manufactured by simply bending a metal material with excellent elasticity such as a steel wire, and the earplugs can be made by cutting a member with excellent heat resistance and elasticity. It is only necessary to process the head into a conical shape and fasten it, making it possible to mass-produce it and manufacturing it at low cost.In addition, it only needs to be handled in the same way as a normal clip, and it can be used with small diameters. It can be easily locked and stored using the locking part, and the operator can use it easily and reliably without having to take special precautions. On top of that,
Ear plugs and plugs used for topcoating are made of water-repellent material, so paint does not easily adhere to them.
Fitting and removing the ground terminal into the insertion hole can be easily performed.

(4) Furthermore, by using the spring clip of the present invention, no paint film is formed inside the grounding terminal, so the grounding wire connection work can be done quickly and easily, and the contact with the grounding terminal is good, which improves the function of the grounding terminal. can be achieved with certainty.

[Brief explanation of the drawing]

FIG. 1A is a perspective view of the transformer case, FIG. 1B is an enlarged sectional view of part P in FIG. 1, FIG. 2 is a perspective view showing the suspended state of the case equipped with the device of the present invention, The figure is a schematic diagram of the electrodeposition coating equipment, Figure 4 is an explanatory diagram when installing a spring clip, Figure 5 is a sectional view showing the sealed state of the ground terminal during undercoating, Figure 6 is its perspective view, Figure 7 is a cross-sectional view showing the engagement state between the latching fitting and the hanging part of the hanger, Figure 8 is a perspective view showing the suspended state of the case when the top coat is applied, and Figure 9 is the ground terminal when the top coat is applied. 10 is a perspective view thereof, FIG. 11 is an explanatory diagram for explaining the attachment/detachment state of the spring clip, and FIG. 12 is an explanatory diagram for explaining the suspension state of the conventional case. It is. 1... Case, 20... Ground terminal, 21... Ground wire, 22... Insertion hole, 24... Screw hole, 25...
...Spring clip, 29...Ear plug, 30...Latch fitting, 36...Plug.

Claims (1)

[Claims for Utility Model Registration] (1) A spring clip is formed by bending a metal member with spring properties so that it can be held, and a pair of ears with excellent elasticity are attached to the tips facing each other and forming a holding part. The plug is fixed, and the ear plug is tightly and releasably fitted into the ground wire insertion hole of the ground terminal protruding from the outer surface of the object to be coated using a spring clip. A paint adhesion prevention device characterized in that, when undercoating a painted object, a conductive latch is screwed into the screw hole of the ground terminal into which the ground wire tightening screw is screwed. (2) A pair of ear plugs with excellent elasticity are fixed to the ends of the spring clips, which are formed by bending a metal member with spring properties so that they can be held, and which constitute the holding part, facing each other. The earplugs are tightly and removably fitted into the grounding wire insertion hole of the grounding terminal protruding from the outer surface of the object using spring clips, and when the object is to be coated, A paint adhesion prevention device characterized in that a highly elastic stopper is tightly and removably fitted into the screw hole of the ground terminal into which the wire tightening screw is threaded.