JPS6236538Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a coating device for coating small parts such as electronic parts.

(b) Conventional technology Conventionally, in order to apply a sealing coating liquid to parts of small batteries, coating devices with a felt attached to the tip of a pipe that supplies the coating liquid, and coating devices equipped with a nozzle have been put into practical use. It is provided. However, when felt is used, the disadvantage is that the felt has poor elasticity and is easily deformed, resulting in poor coating position accuracy and variations in the finished state of the coated surface. In particular, felt was unsuitable for coating high viscosity coating liquids. Further, when coating using a nozzle, there is a drawback that the coating area is not constant because the coating liquid sprayed from the nozzle is diffused. These coating devices also have the disadvantage that the amount of coating liquid flowing out is not constant, making it difficult to adjust the coating thickness.

(c) Problems that the invention aims to solve In order to make the amount and area of application accurate,
A coating device has been proposed in which a brush is attached to the tip of a pipe that supplies a coating liquid.

By the way, the connection part between the pipe and the brush in a conventional brush-type coating device is, for example, a structure in which the pipe is inserted into the brush (Japanese Patent Application Laid-open No.
No. 53-130738) It had a structure in which the opening at the tip of the pipe was joined to the base of the brush (Japanese Patent Application Laid-open No. 57-50571). In this structure, there is a problem that the coating thickness is different between the part of the brush that receives the coating liquid directly from the tip of the pipe and the part that does not, resulting in uneven coating.

Furthermore, in the structure of (2), the tip of the ear is tightly bound to prevent the hair from falling off, and as a result, there is a risk that the coating liquid may not satisfactorily impregnate the tip of the ear, resulting in incomplete application.

The purpose of this invention is to solve the above-mentioned problems and provide a coating device that can uniformly impregnate the entire brush with a coating liquid.

(d) Means for solving the problem This invention applies the coating liquid stored in the coating liquid tank through a coating liquid supply pipe and a brush attached to the tip of this coating liquid supply pipe. In the coating device for supplying the coating liquid to a surface, a hole is bored in the side surface of the tip of the coating liquid supply pipe, and the bristles of the brush are attached to the outside of the hole,
The spike is guided into the coating liquid supply pipe through the hole, and the tip of the spike protrudes from the opening at the tip of the coating liquid supply pipe.

(e) Function The coating device of this invention supplies the coating liquid from the entire side surface of the brush through the coating liquid supply pipe. On the sides of the brush, a space is created inside due to the swell of the ears, making it easy to impregnate the coating liquid.
Furthermore, since the entire bristles of the brush receive the coating liquid from the coating liquid supply pipe, the coating liquid is uniformly supplied to the entire brush, and uneven coating does not occur.

(f) Embodiments Hereinafter, embodiments of this invention will be described with reference to the drawings.

FIG. 1 is a cutaway sectional view showing an enlarged main part of the coating device of this embodiment. This coating device is a device for coating a sealing liquid on the inner surface of a cap member of a small flat battery, which is an object to be coated. One end of the coating liquid supply pipe 1 communicates with a coating liquid tank (not shown) for storing the coating liquid, and a brush 2 is attached to the opening end 3 on the coating liquid outlet side. brush 2
is a hole 4 drilled near the opening end 3 on the coating liquid outflow side.
The tip of the tip extends to the outside of the opening end 3 on the outflow side of the coating liquid. Further, one end of the brush 2 is bundled, a wire 5 is wound around the bundle, and the wire 5 is fixed to the coating liquid supply pipe 1. In order to prevent the coating liquid 7 from leaking from the hole 4, the portion where the wire 5 is wound and the hole 4 are covered and sealed with a sealing tape 6 made of Teflon or the like. In this way, the brush 2 is fitted into the coating liquid outlet opening end 3, and the coating liquid 7 supplied from the coating liquid supply pipe 1 comes into contact with and impregnates the entire side surface of the brush 2. The coating liquid supply pipe 1 is arranged on the inner surface of the cap member 8 so as to be inclined at a predetermined angle. For example, as shown in the figure, the cap member 8 is placed on a cap member receiver 10 of a pedestal 9, and is evacuated by evacuating an exhaust passage 11 formed on the pedestal 9 and communicating with the cap member receiver 10. It is fixed to the pedestal 9 by suction.

In the coating processing apparatus configured as described above, when coating the entire inner surface of the cap member 8, the base 9 is rotated. During the coating process, brush 2
A cap member 4 whose bristles rotate together with a base 5.
By contacting the inner surface, the coating liquid 7 is applied to the inner surface. When increasing the coating thickness, the cap member 8 may be rotated several times. As mentioned above, this coating device is equipped with a brush 2 whose one end is immersed in the coating liquid 7 in the coating liquid supply pipe 1, so that the elasticity of the brush allows the coating to be applied to a uniform thickness. It has the advantage of providing a beautiful finished coating surface. In addition, a certain amount of coating liquid oozes out from the tip of the brush corresponding to the amount of coating liquid supplied to the coating liquid supply pipe 1, so the coating thickness is proportional to the amount of coating liquid supplied. It has the advantage that the thickness can be adjusted by adjusting the amount of coating liquid supplied. Furthermore, since the coating width is determined according to the size of the bristles, the accuracy of the coating area is improved, and the elasticity of the brush allows it to easily conform to the shape of the object to be coated, making it especially suitable for coating small parts. It has excellent reproducibility, can be used many times, and is economical. Furthermore, since the brush has the property of not interfering with the flow of a high viscosity liquid, even when a high viscosity coating liquid is used, it can be applied uniformly. In this way, the coating device including the coating liquid supply pipe 1 to which the brush 2 is attached can always perform stable and highly accurate coating processing.

Next, an automatic coating processing apparatus to which the coating apparatus according to the invention is applied will be explained.

FIG. 2 is a layout diagram of the automatic coating processing apparatus.
In the figure, a workpiece holding section 15 and a driving section 16 are shown.
is shown in cross-section. Figure 3 shows coating device 1.
FIG. 3 is a sectional view showing the vacuum cylinder section 14 for setting the coating liquid supply pipe 1 in No. 3 to the coating processing position. In FIGS. 2 and 3, the same parts as in FIG. 1 are given the same numbers, and their explanations will be omitted.

The coating device 13 has the same structure as in the previous embodiment. The coating liquid supply pipe 1 is fixed to the lower end of the piston 16 and communicates with a coating liquid supply port 22 formed in the lower end. Then, the coating liquid supply port 2
A flexible tube 19 for introducing a coating liquid is connected to the flexible tube 19 for introducing a coating liquid, and the coating liquid sent out by a pump 18 from the coating liquid tank 17 is supplied to the pipe 1 for supplying a coating liquid through the flexible tube 19 for introducing a coating liquid. Supplied. The coating thickness is adjusted by the amount of coating liquid discharged from the pump 18. The coating liquid tank 17 stores a sealing liquid coating liquid.

As shown in FIG. 3, the vacuum cylinder section 14 is
It has a cylinder 21 and a piston 20 housed within the cylinder 21. The inside of the cylinder 21 is divided into an atmospheric chamber 21a and a decompression chamber 21b by a spring pressing portion 20a at the top of the piston 20.
The atmospheric chamber 21a communicates with the atmosphere through an atmospheric air inlet 23 formed in the side of the cylinder 21. A muffler 23a for removing dust is attached to the air inlet 23. The decompression chamber 21b is the cylinder 21
It communicates with an exhaust port 24 bored in the side of the. An exhaust pipe 25a having one end led to the suction side of the exhaust pump 26 is attached to the exhaust port 24. Decompression chamber 2
A spring 27 fitted to the outside of the piston 20 is housed inside 1b. The spring 27 is attached to the lower part of the cylinder 21 at its lower end, and to the spring pressing part 2 at its upper end.
0a, and urges the piston 20 upward via the spring pressing portion 20a. piston 2
0 moves downward when the pressure reduction chamber 21b is evacuated and depressurized by the exhaust pump 26, the spring pressing portion 20a is pushed down by the pressure difference between the atmospheric chamber 21a and the pressure reduction chamber 21b. The moving distance of the piston 20 approximately corresponds to the distance between the bristles of the brush 2 and the inner surface of the cap member 8, and
Adjusted by the displacement within.

The object holding section 15 has a pedestal 9 that holds the cap member 8. The pedestal 9 has a cap member receiver 10 on which the cap member 8 is placed, and a shaft portion 28 through which an exhaust passage 11 communicating with the cap member receiver 10 is formed.
8 and a connecting portion 29 fixed to the lower end of the connecting portion 8. The shaft portion 28 has a bearing 31 provided in a through hole of a bearing holding portion 31 fixed to the peripheral edge of the turntable 30.
It is rotatably held by a and 31b.
The connecting portion 29 includes a convex end portion that connects to a concave portion 32a of a connecting portion 32 of the drive portion 16, which will be described later, and an O-ring 29a is fitted in a portion that comes into contact with the concave portion 32a during connection. The cap member 4 placed on the cap member receiver 10 is suctioned and fixed to the cap member receiver 10 by evacuating the exhaust path 11. In order to increase the suction area, the upper opening 12 of the exhaust passage 11 is made larger than the exhaust passage within the shaft portion 28. The turntable 30 is rotated by a rotating device (not shown), and the cap member conveyed by a feeder (not shown) is placed on the pedestal 9.
The cap member remains at rest at a set position where the cap member is set, a connected position where the connecting portion 29 faces the connecting portion 32, and a discharge position where the coated cap member is released after coating is completed. These positions are performed by an indexing device (not shown).

The driving section 16 includes a connecting section 32 that is connected to the connecting section 29 by a recessed portion 32a being pressed into the connecting section 29, and a motor section 33 that rotationally drives the connecting section 32. The shaft portion 34 of the connecting portion 32 is connected to the rotating shaft 33a of the motor portion 33,
It is rotatably held by the support portion 16a.
The shaft portion 34 also has an upper portion that communicates with the recess 32a.
and an exhaust hole 16b bored in the support part 16a at the lower part.
An exhaust passage 35 is formed which communicates with the. The motor section 33 includes a drive mechanism such as a motor (not shown) that rotates a rotating shaft 33a connected to the shaft section 34 of the connecting section 32, and is fixed to the movable table 36. Also, when the rotating shaft 33a is rotated, the supporting portion 16
The support part 16a is fixed to the movable table 36 via a rotation stopper plate 16c so that the support part 16a does not rotate. The movable table 36 is moved up and down by a vertical movement device (not shown). The connecting portion 29 and the connecting portion 32 are crimped and connected by moving the movable table 36 upward at the connecting position where they face each other. In this connected state, the exhaust path 35 is connected to the exhaust path 11.
communicate with. A flexible exhaust pipe 25b, one end of which is led to the suction side of the exhaust pump 26, is attached to the exhaust hole 16b, and the exhaust passage 35 is exhausted by the exhaust pump 26 through the flexible exhaust pipe 25b.

The coating processing operation of the automatic coating processing apparatus configured as above will be explained.

First, as shown in FIG.
is placed on the pedestal 9, and then the turntable 30
rotates, and the connecting portion 29 moves into the recess 32a of the connecting portion 32.
Rotation is stopped at the connected position opposite to. In this connected state, the movable table 36 rises, and the connecting part 29
The connecting portion 32 is pressed into contact with the connecting portion 32 . In this pressurized state, the exhaust passage 35 is evacuated by the exhaust pump 26, and the inside of the decompression chamber 21b is also evacuated. When the exhaust path 35 is exhausted, the exhaust path 11 communicating with the exhaust path 35 is exhausted. Therefore, the pressure inside the exhaust passages 11 and 35 is reduced by this exhaust, so that the cap member 8 placed on the pedestal 9 is attracted to the cap member receiver 12, and the connecting portion 29 and the connecting portion 3
2 are crimped and connected. When the suction of the cap member 8 and the connection between the connecting portion 29 and the connecting portion 32 are completed, the motor in the motor portion 33 starts operating, and the rotary shaft 33a is driven to rotate. The pedestal 9 is connected to the connecting portion 32 via the connecting portion 29.
is rotated by the rotational force, and the cap member 8 adsorbed to the pedestal 9 rotates. In this way, the rotational movement of the cap member 8 that has been sucked is performed, and at the same time, the pressure inside the decompression chamber 21b is reduced by the exhaust from the decompression chamber 21b. When the pressure in the decompression chamber 21b decreases, a pressure difference occurs between the atmospheric chamber 21a and the decompression chamber 21b, and the spring pressing portion 20a moves toward the decompression chamber 21b. Due to this movement, the lower end of the piston 20 moves to the outside of the cylinder 21, and as shown in FIG.
A state of application is reached in which the tips of the bristles come into contact with the inner surface of the cap member 8. The contact state of the brush 2 is with the cap member 8.
is held until it rotates several times, and the sealing liquid is applied to a predetermined coating thickness. In this way, the cap member 8 is attracted, the pedestal 9 and the drive unit 16 are connected,
The coating processing operation consisting of moving the brush 2 to the coating position is performed in conjunction with the exhaust from the exhaust passages 11, 35 and the vacuum chamber 21b. After the cap member 8 has rotated several times and coating has been completed, the motor drive of the motor section 33 and the exhaustion of the exhaust pump 26 are stopped. By stopping the exhaust, the pressure in the decompression chamber 21b increases, the piston 20 returns to the atmospheric chamber 21a side by the action of the spring 27, the brush 2 separates from the inner surface of the cap member 8, and application stops. .
At this time, the pressure inside the exhaust passages 11 and 35 also returns to atmospheric pressure, so that the adsorption state of the cap member 8 and the connecting portion 29
The connection state between the connection portion 32 and the connection portion 32 is released. After the release, the movable table 36 moves downward and connects the connecting part 3.
2 is separated from the connecting portion 29. Subsequently, the turntable 36 rotates to the cap member release rotation position,
The process moves on to releasing the coated cap member.

As described above, this automatic coating processing device is equipped with the coating device 13 of the embodiment described above, and can always perform stable and highly accurate coating processing, and is capable of easily setting the bristles of the brush 2 to the coating position and setting the coating to the coating position. Since the connected state of the application body holding part 15 and the driving part 16 can be maintained by evacuating the exhaust passages 11 and 35 and the decompression chamber 21b, a simple machine consisting of an exhaust system such as an exhaust pump can be used. It has the advantage of being able to perform automatic coating processing smoothly due to its unique configuration. In addition, since the holding of the cap member and the application process are carried out by depressurizing and increasing the pressure in the exhaust system without relying on electrical control, it has the advantage of excellent explosion-proof properties, and is particularly suitable for applying highly flammable sealing fluids. Applicable.

(g) Effects of the invention As described above, according to this invention, the coating liquid can be supplied to the entire bristles of the brush from the side of the brush. By the way, the bristles of the brush are tied tightly to prevent the hand from falling off, and it is not easy to supply the application liquid from this part. A space is created. Therefore, by supplying the coating liquid from the side, the coating liquid can easily be impregnated into this space. Furthermore, by supplying the coating liquid to the entire side surface, the entire space inside the ear can be uniformly impregnated with the coating liquid. Thereby, the amount of the coating liquid supplied to the tip can be kept uniform throughout and always constant. Furthermore, by supplying the coating liquid to the entire space inside the panicle, even if the coating liquid has a high viscosity, impregnation becomes easy and uniform coating can be achieved.

[Brief explanation of the drawing]

Fig. 1 is an enlarged cutaway sectional view showing the main parts of a coating device according to an embodiment of this invention, Fig. 2 is a layout diagram of an automatic coating processing device to which the coating device according to this invention is applied, and Fig. 3 is a It is a sectional view showing the vacuum cylinder section 14 of the automatic coating processing apparatus. 1... Coating liquid supply pipe, 2... Brush, 3...
...Opening end on the coating liquid outflow side (of the coating liquid supply pipe 1), 4... Hole, 5... Wire, 7... Coating liquid.

Claims (1)

[Scope of Claim for Utility Model Registration] A coating device that supplies a coating liquid stored in a coating liquid tank to a coating surface via a coating liquid supply pipe and a brush attached to the tip of the coating liquid supply pipe. , drilling a hole in the side surface of the tip of the coating liquid supply pipe, and attaching the tip of the brush to the outside of the hole;
A coating device, characterized in that the spike is guided into the coating liquid supply pipe through the hole, and the tip of the spike protrudes from the tip opening of the coating liquid supply pipe.