JP7071888B2 - Sheila coating device - Google Patents

Description

The present invention relates to a sealer coating device.

Conventionally, some panel members constituting a vehicle body, for example, a door panel, are formed by joining an inner panel and an outer panel. Then, after joining the inner panel and the outer panel, a sealer for waterproofing and rust prevention processing is applied to the mating position of both by a sealer coating device.

When applying the sealer with the sealer application device, the nozzle discharge port can be appropriately positioned near the alignment position by bringing the guide member for guiding the nozzle into contact with the surface of the panel. .. Then, in this state, by discharging the sealer while moving the nozzle along the alignment position, the sealer can be appropriately applied to the alignment position.

During the above coating operation, the guide member slides on the surface of the panel, so that the guide member wears and changes its shape due to repeated coating operations, making it impossible to properly position the nozzle. Will end up. As a measure against such wear, for example, in Patent Document 1, the guide member is made of a metal material having excellent wear resistance.

Japanese Unexamined Patent Publication No. 2007-283262

Due to the repeated coating operation by the sealer coating device, the wear of the nozzle becomes a problem in addition to the above guide member. That is, when the nozzle slides on the surface of the panel and is worn or deformed, the coating state of the sealer changes, resulting in poor coating.

However, it is not always realistic to configure the entire member with a wear-resistant member as in Patent Document 1 from the viewpoint of cost and the like.

Under such circumstances, it is an object of the present invention to prevent coating defects due to nozzle wear.

In order to solve the above problems, the present invention is a sealer coating device provided with a nozzle having a discharge port for discharging the sealer, wherein at least the discharge port side of the nozzle integrates a ceramic member on the surface of the base material. It is characterized in that it is a sealer coating device configured to be provided.

According to the present invention, by providing the ceramic member on the nozzle surface, it is possible to improve the wear resistance of the nozzle and prevent the sealer from being poorly applied due to the wear of the nozzle.

As the above-mentioned sealer coating device, the ceramic member can have a tapered shape whose thickness gradually decreases toward the discharge port side. This makes it possible to reduce the thickness of the ceramic member on the discharge port side as much as possible, set the thickness of the nozzle on the discharge port side to be small, and increase the thickness on the side opposite to the discharge port. The rigidity of the ceramic member can be ensured.

Further, the present invention is characterized by a ceramic member integrally provided on the surface of a nozzle for discharging a sealer, wherein the main component thereof is zirconium oxide.

According to the present invention, the ceramic member provided on the surface of the nozzle can improve the wear resistance of the nozzle and prevent the sealer from being poorly applied due to the wear of the nozzle.

According to the present invention, the ceramic member provided on the surface of the nozzle can improve the wear resistance of the nozzle and prevent the sealer from being poorly applied due to the wear of the nozzle.

It is a figure which shows the coating operation by a coating gun. It is a perspective view which shows the coating gun which concerns on one Embodiment of this invention. It is a top view of the coating gun which concerns on one Embodiment of this invention. FIG. 3 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a cross-sectional view taken along the line BB of FIG. It is a perspective view which shows the state of applying a sealer by the coating gun of the said embodiment. It is a front view which shows the state of applying a sealer by the coating gun of the said embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

As shown in FIG. 1, the back door 2 provided on the vehicle body 1 is formed by joining the inner panel and the outer panel constituting the back door 2, and then a coating operation of applying a sealer to the aligned position is performed.

Specifically, the operator 3 brings the coating gun 10 as the sealer coating device close to the alignment position of the inner panel and the outer panel constituting the back door 2 to apply the sealer. The alignment position of the inner panel and the outer panel extends along the edge of the panel. For example, the operator 3 moves the coating gun 10 in the direction of arrow C in the figure and discharges the sealer to eject the alignment position. Sheila can be applied along the line. Although the back door 2 is illustrated in FIG. 1, the present embodiment is not limited to this, and the present embodiment is applied to the alignment position of the inner panel and the outer panel of each panel member provided on the vehicle body 1 such as a side door and a hood panel. Sheila can also be applied with a gun.

As shown in FIGS. 2 and 3, the coating gun 10 has a pipe 19, a nozzle 11 and a guide member 12. The nozzle 11 is provided at the tip end portion of the pipe 19. Further, the guide member 12 is provided on the tip end side of the pipe 19 so as to be branched from the pipe 19. The guide member 12 is provided adjacent to the nozzle 11.

As shown in FIG. 4, the nozzle 11 is composed of a base material 13 and a ceramic member 14 provided on the outer surface side of the base material 13. In the present embodiment, the ceramic member 14 is integrally provided with the base material 13 by adhering the ceramic member 14 to the surface of the base material 13 using an epoxy-based adhesive. However, the present invention is not limited to this, and the nozzle 11 in which the ceramic member 14 is integrally provided on the base material 13 can be formed by adhering, fixing, or the like by an appropriate method. By providing the ceramic member 14 on the surface of the base material 13 in this way, for example, even a shape that is difficult to be molded only by the ceramic member 14 can be molded. Further, since the nozzle 11 can be restored to its original shape only by replacing the ceramic member 14 attached to the base material 13, its maintenance becomes easy.

The ceramic member 14 is made of a material having better wear resistance than the base material 13. In the present embodiment, the ceramic member 14 contains zirconium oxide as a main component. The base material 13 is made of SUS. When the main component of the ceramic member 14 is zirconium oxide, the wear resistance is high, so that the ceramic member 14 itself is less worn and can be used for a long period of time. Further, when the main component of the ceramic member 14 is zirconium oxide, the Young's modulus is about the same as the Young's modulus of SUS, for example, 200 GPa or more and 220 GPa or less. Therefore, when the base material 13 is elastically deformed, the ceramic member 14 is also the same. It is elastically deformed to some extent and easily follows the base material 13.

A discharge port 11a is provided on the inner surface side of each base material 13 at the center of the nozzle 11, and the sealer supplied via the pipe 19 is discharged from the discharge port 11a.

Since the thickness W of the nozzle 11 on the side of the discharge port 11a that affects the discharge condition of the sealer changes the discharge condition of the sealer from the discharge port 11a, it is important to appropriately set this thickness W. In this respect, in the conventional nozzle, the nozzle is composed of a single material (for example, SUS), and the thickness W on the discharge port side is set.

On the other hand, in the nozzle 11 of the present embodiment, the ceramic member 14 is provided on the surface of the base material 13 as described above, and the thickness of the base material 13 and the ceramic member 14 on the discharge port 11a side. Each thickness is set so that the total of the above is the thickness W. As a result, the nozzle 11 having the ceramic member 14 on the surface can be formed without changing the ejection conditions of the conventional nozzle and the sealer. Further, by using the ceramic member 14 only on a part of the nozzle 11, that is, on the outer surface side in contact with the vehicle body, the ceramic member 14 can be arranged only in a necessary place. For example, the nozzle 11 is made of a single ceramic. Compared with the case of being composed of the member 14, the cost of the nozzle 11 can be reduced.

Further, in the present embodiment, the ceramic member 14 has a tapered surface on the side opposite to the surface to be attached to the base material 13, and the thickness thereof gradually decreases toward the discharge port 11a. are doing. With such a shape, the thickness of the ceramic member 14 on the discharge port 11a side is made as small as possible so that even a thickness W having a smaller width can be realized, and the base end side of the ceramic member 14 (with the discharge port 11a). By increasing the thickness on the opposite side), the rigidity of the ceramic member 14 can be ensured. In this embodiment, as an example, the thickness W is set to 1.0 mm, and the thickness of the end portion of the ceramic member 14 on the discharge port 11a side is set to 0.5 mm.

The ceramic member 14 is chamfered to the edge on the discharge port 11a side. This makes it possible to prevent the painted surface of the vehicle body from being damaged when the nozzle 11 comes into contact with the vehicle body.

As shown in FIG. 3, the guide member 12 is composed of a base material 15 and a wear-resistant member 16 provided on the surface of the base material 15 on one end side.

In the present embodiment, like the nozzle 11, the base material 15 is made of SUS, and the wear-resistant member 16 is made of a ceramic material containing zirconium oxide as a main component. Further, the wear-resistant member 16 is adhered with an epoxy-based adhesive and is integrally provided on the base material 15.

As shown in FIG. 5, the wear-resistant member 16 is formed in a hollow cylindrical shape, has a notch on one end side thereof, and is attached to the surface of the base material 15 on the other end side (not shown). ). When the main component of the wear-resistant member 16 is zirconium oxide, the Young's modulus is about the same as the Young's modulus of SUS, for example, 200 GPa or more and 220 GPa or less. Therefore, when the base material 15 is elastically deformed, the wear-resistant member 16 Is elastically deformed to the same extent and easily follows the base material 15.

The main component of the ceramic member 14 and the wear-resistant member 16 (hereinafter, when the ceramic member 14 and the wear-resistant member 16 are collectively referred to as a member) is 100% by mass of the components constituting each member. It refers to a component that occupies 80% by mass or more, and as a component other than zirconium oxide, at least one of silicon oxide and aluminum oxide, and as a stabilizer, yttrium oxide (Y ₂ O ₃ ) and yttrium oxide (itterbium oxide). It may contain at least one of Yb ₂ O ₃ ), cerium oxide (CeO ₂ ), disprosium oxide (Dy ₂ O ₃ ), magnesium oxide (MgO) and calcium oxide (CaO), respectively.

The content of the components constituting each member is determined by identifying the components using an X-ray diffractometer (XRD) and then determining the element content using a fluorescent X-ray analyzer to determine the content of the identified components. It may be converted into an amount. The Young's modulus of each member can be obtained by the ultrasonic pulse method described in JIS R1602-1995.

When the main component of the ceramic member 14 is zirconium oxide, the average particle size of the zirconium oxide crystal particles is preferably 1 μm or less (excluding 0 μm). When the average particle size of the zirconium oxide crystal particles is in the above range, the phase transformation from tetragonal to monoclinic is less likely to occur even if the nozzle 11 is used for a long time in an environment exposed to high temperature. , Can be used for a long period of time. In particular, the average particle size of the zirconium oxide crystal particles is preferably 0.4 μm or less (however, excluding 0 μm).

In order to obtain the average particle size of the particles constituting each member, first, the fracture surface of each member is polished until it becomes a mirror surface, and then thermal etching is performed. The surface obtained by thermal etching is used as a measurement surface, and an image is obtained by photographing with a scanning electron microscope at a magnification of 5000 to 10000 times. Six straight lines with a length of 8 μm, for example, at intervals of 30 ° are drawn around any point in the image, and the number of crystals existing on these six straight lines is the sum of these straight lines. The average particle size can be obtained by dividing by the length.

Further, for example, the ceramic member of the present embodiment is integrally provided by adhering the ceramic member of the present embodiment to an existing nozzle 11 made of a material having a wear resistance inferior to that of a ceramic member such as SUS by post-processing. It is also possible to improve the wear resistance of the existing nozzle 11. At this time, by attaching the ceramic member 14 so as not to change the thickness W of the nozzle 11 (for example, by cutting a part of the nozzle 11), the coating condition of the sealer by the coating gun 10 is changed. However, the wear resistance of the nozzle 11 can be improved. Although the case of the nozzle 11 is shown, the wear resistance of the existing guide member 12 can be improved by attaching the wear resistant member 16 in the same manner. At this time, by attaching the wear resistant member 16 so as not to change the shape such as the thickness of the guide member 12, the wear resistance can be improved without affecting the coating condition of the sealer by the coating gun 10. can.

Next, the operation of applying the sealer to the alignment position 23 of the panel member 20 composed of the inner panel 21 and the outer panel 22 by the above coating gun 10 will be described with reference to FIGS. 6 and 7.

As shown in FIGS. 6 and 7, the coating gun 10 is brought close to the panel member 20 and the side surface of the guide member 12 is brought into contact with any part of the panel member 20 (in the illustrated example, the folded portion of the outer panel 22). This makes it possible to position the nozzle 11 with respect to the vehicle body, bring it into contact with a predetermined position of the panel member 20, and bring the discharge port 11a closer to the alignment position 23. In this state, the coating gun 10 discharges the sealer X, so that the sealer X can be applied to the alignment position 23.

Then, the guide member 12 is brought into contact with the panel member 20, and while maintaining the state in which the discharge port 11a is brought close to the alignment position 23, the coating gun 10 is aligned and the extending direction of the alignment position 23 (the sealer X in FIG. 6 is applied). The sealer X is ejected by moving the sealer X along the direction toward the front and back of the paper surface in FIG. As a result, the sealer X can be applied along the extending direction of the alignment position 23.

In the process of this coating operation, the edge of the nozzle 11 on the discharge port 11a side and the surface of the guide member 12 slide on the surface of the panel member 20. At this time, as described above, by providing the ceramic member 14 and the wear-resistant member 16 on the edge of the nozzle 11 on the discharge port 11a side and the surface of the guide member 12, the surfaces of the nozzle 11 and the guide member 12 are worn. Can be prevented. Therefore, repeated use of the coating gun 10 causes the surface of the nozzle 11 to wear and changes the discharge condition of the sealer, and wear of the surface of the guide member 12 changes the contact state of the guide member 12 with respect to the panel member 20. Therefore, it is possible to prevent the discharge position of the sealer X from changing. Therefore, the sealer can always be applied with stable quality without performing detailed maintenance of the application gun 10. Therefore, it is possible to reduce the labor for maintenance of the coating gun 10 and the cost for replacement. The position where the guide member 12 abuts is not limited to the panel member 20, and may be a predetermined position in the vicinity of the panel member 20 on the vehicle body.

Further, by forming the ceramic member 14 into a tapered shape during the coating operation of the sealer, for example, the nozzle 11 can be moved to an appropriate discharge position, or the nozzle 11 can be moved along the extending direction of the alignment position 23. This tapered surface may be used as a guide surface that abuts on the vehicle body and guides the nozzle 11 in an appropriate direction during an operation such as movement.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

In the above embodiment, the ceramic member 14 has a tapered shape whose thickness gradually decreases (see FIG. 4), but for example, a shape in which the thickness gradually decreases toward the discharge port 11a or a discharge port. The side of the outlet 11a may be shaped so that the thickness is partially reduced.

Further, in the above embodiment, the ceramic member 14 is provided on the outside of the base material 13 so as to cover the base material 13, but for example, the ceramic member 14 may be provided only on the portion of the nozzle 11 that comes into contact with the vehicle body.

1 Body 2 Backdoor 3 Worker 10 Coating gun (sealer coating device)
11 Nozzle 11a Discharge port 12 Guide member 13 Base material 14 Ceramic member 15 Base material 16 Wear resistant member 19 Pipe 21 Inner panel 22 Outer panel 23 Alignment position

Claims (3)

A sealer coating device equipped with a nozzle having a discharge port for discharging the sealer.
The nozzle is a sealer coating device, characterized in that at least the side of the discharge port is configured by integrally providing a ceramic member on the surface of a base material. The sealer coating device according to claim 1, wherein the ceramic member has a tapered shape whose thickness gradually decreases toward the discharge port side. The sealer coating apparatus according to claim 1 or 2, wherein the main component of the ceramic member is zirconium oxide.

Images