JPS6231178Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a device for coating the outer peripheral surface of a shaft-shaped member with paint.

BACKGROUND ART For electronic components such as axial-type diodes, which have shaft-shaped members with leads extending in both directions from the component body, it is necessary to indicate the model, polarity, grade, and lot number.

However, with electronic components where the component body is enclosed within a glass sleeve, light passes through, so if the display paint is thin, the display is difficult to see, and if the paint is thick, the display blurs and becomes difficult to see.

On the other hand, when the color of the display and the color of the base are similar, there is a drawback that the display becomes grainy and difficult to read.

Therefore, an intermediate layer is formed on the display surface using a non-light-transmitting paint or a paint with a color that makes the displayed color stand out, unlike the color of the base, and the display is performed from above the intermediate layer.

Figures 1 to 3 show an example of a diode packaging device. In the figure, 1 is a chain conveyor (moving body) in which a pair of endless chains are arranged in parallel and rotated synchronously. A locking member 2 having a V-groove is fixed with a pitch. Reference numeral 3 denotes a diode (shaft-like member), which leads leads 5, 5 in both directions of the diode body 4, and moves with the leads locked to the locking member 2. A drum 6 is disposed coaxially with the diode 3 at a lower intermediate portion of the conveyor 1, and is rotated at a position where its outer circumferential surface contacts the outer circumferential surface of the diode main body 4. Reference numeral 7 denotes a paint tray containing paint 8, and a portion of the drum is immersed in the paint 8. 9 is connected to leads 5 and 5 to prevent the diode 3 transferred by the conveyor 1 from floating at the drum 6 position.
10 is a support stand that supports the leads 5, 5; 11 is a scraping roller that scrapes off excess paint adhering to the outer circumferential surface of the diode body 4, forming a groove along the outer circumferential surface; There is. Also 9'
indicates a presser roller, and 10' indicates a support stand.

The operation of this device will be explained below. conveyor 1
The diode body 4 of the diode 3 that is fed in is positioned on the circumferential surface of the drum 6 by a guide body (not shown), and then further advanced. Then, at the position of the drum 6, the paint 8 which has been rotated by the presser roller 9 and has been deposited on the circumferential surface of the drum is deposited on the outer circumferential surface of the diode main body 4. Then, the diode 3 whose outer peripheral surface is coated with paint has excess paint removed by a scraping roller 10 at the front, and is sent to the next process.

This device has the advantage of being able to be coated continuously and has a simple structure, but on the other hand, even if there are air bubbles in the paint, air is drawn in during painting, or the lead is slightly bent, it can be corrected by the presser roller 9. figure,
Another drawback was that there were areas where the paint did not adhere, making it easy for scratches and pinholes to form on the painted surface.

These scratches and pinholes not only impair the appearance, but also cause problems such as blurring or blurring of the subsequently formed display, which is undesirable, and therefore an improvement has been desired.

DISCLOSURE OF THE INVENTION The present invention was proposed in view of the above-mentioned drawbacks, and provides a device that enables a good exterior appearance without scratches or pinholes.

This invention rotates a plurality of shaft-like members rotatably locked at regular intervals along a moving body, with the outer peripheral surface coated with paint contacting the outer peripheral surface of the shaft-like members at a fixed position. It is characterized by disposing a drum and a sponge member having a flat surface that comes into contact with the outer peripheral surface of the shaft-like member.

With the above structure, the present invention can remove uneven thickness of the paint that could not be removed with a drum or scraping roller, correct scratches and pinholes, improve the appearance, and improve the quality of the display that is subsequently formed. can.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 4 and 5 by applying it to the apparatus shown in FIG. In the figure, the first
The same reference numerals as those in the drawings indicate the same parts, and the explanation will be omitted. The only difference from the apparatus shown in FIG. 1 is that a sponge member 12 is disposed between the drum 6 and the scraping roller 10. The diode (shaft-shaped member) 3 is disposed on the movement locus plane of the diode (shaft-shaped member) 3 that moves by. The width W of the sponge member 12 is not limited as long as the length L from the outer periphery of the diode body 4 to the lead 5 has enough margin, but if the length L is short, it should be the same size as the length of the diode body 4. Alternatively, the length in the moving direction is set to be slightly shorter than this, and the length in the moving direction is set to be sufficiently longer than the outer circumferential length of the diode main body 4. Further, the material of the sponge member 12 is elastic,
Any material may be used as long as it can absorb the paint, but polyurethane is suitable, for example.

The operation of this device will be explained below. conveyor 1
When the moving diode 3 passes between the drum 6 and the presser roller 9, it is rotated by the rotation of the presser roller 9, and the paint 8 that has been deposited on the circumferential surface of the drum adheres to the entire circumference of the diode body 4. At this time, if air bubbles 13 are mixed in the paint 8 as shown in FIG. 6, the air bubbles 13 will be crushed if they are large because the distance between the diode body 4 and the drum 6 is the thickness of the paint 8. The paint 8' adhering to the outer peripheral surface of the diode body 4 is pushed out and spread, resulting in areas where the paint does not adhere or areas 14 where the paint is extremely thin even if it adheres, and air bubbles 1.
If 3 is small, a pinhole 15 will occur. This is because the diameter of the drum 6 is sufficiently larger than the diameter of the diode main body 4, and the air bubbles 13 are trapped in the paint 8 when the paint is applied, making it difficult to completely prevent the occurrence of pinholes, etc. It is.

In this way, uneven paint thickness and pinholes can be prevented.
The diode 3 that has become blurred is attached to the sponge member 12.
Move to position. This sponge member 12 can absorb paint, and since its surface has elastic unevenness, the paint 8' of the diode 3 adheres to the unevenness. The diode 3 rotates on the sponge member 12 as it moves, and when the convex part leaves the diode body 4, it strokes the surface of the paint 8'. Since there are countless convex portions, the paint 8' is evenly stroked.

Therefore, thick parts of the paint become thinner, thinner parts and scratched parts are filled with surrounding paint or paint that has already adhered to the convex parts, pinholes are also corrected, and excess paint is scraped off with the scraping roller 11. The coating is coated with a uniform thickness.

In this way, according to the present invention, it is possible to eliminate uneven paint thickness that could not be removed using a drum or scraping roller alone, and it is possible to correct smudges and pinholes, to achieve a uniform thickness of paint, and to improve the appearance. In addition to this, the quality of the subsequently formed display can be improved.

Further, since it is only necessary to add a sponge member to the conventional device, it is easy to implement.

It should be noted that the present invention is not limited to the above-mentioned embodiments; for example, the shaft-shaped member 3 can be applied not only to diodes but also to other parts in general.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view showing a conventional example of an exterior device for a shaft-shaped member, Fig. 2 is a sectional view taken along line AA in Fig. 1, Fig. 3 is a sectional view taken along line BB in Fig. 1, and Fig. 4. is a partially sectional side view of the exterior device according to the present invention, and FIG. 5 is FIG. 4C.
-C sectional view, Figure 6 is a partial side sectional view of Figure 4,
Indicates uneven paint thickness and pinholes on the painted surface. 1... Moving body, 3... Shaft-like member, 6... Drum, 12... Sponge member.

Claims (1)

[Scope of utility model registration request] A rotating drum is arranged along a moving body that moves with multiple shaft-like members rotatably locked at regular intervals, with the outer peripheral surface coated with paint in contact with the outer peripheral surface of the shaft-like members at a fixed position. 1. A coating device for a shaft-like member, characterized in that a sponge member is arranged so as to come into contact with the outer peripheral surface of the shaft-like member on which paint is applied by a drum.