JPH01304077A - Coating device - Google Patents

Abstract

PURPOSE:To finish smoothly the outer surface of a material to be coated by pivoting the material to be coated just after coating, fluidizing a non-dried film for uniforming its thickness and drying the non-dried film in said state. CONSTITUTION:A conveyor device 1c is provided between an inlet of a tunnel- shaped device main body 1 with a coating chamber 1e on the inlet side and a preheating and drying chamber if on the outlet side. A supporting shaft 3c supporting a material to be coated B is provided on a conveyor chain of said conveyor device. Further, the supporting shaft 3c is retained so as to rotate axially, and a supporting shaft driving means 5 to pivot said supporting shaft 3c in the preheating and drying chamber 1f is installed. As a result, the outer surface of the material to be coated can be finished smoothly.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a coating device for coating the entire outer surface of a box such as a fuel tank for a vehicle, and particularly for obtaining a uniform coating film. The present invention relates to a coating device that can perform

[Conventional technology]

When an electrostatic coating device is used to efficiently coat a box-shaped item such as a vehicle fuel tank, the coating device suspends the object on a conveyor and moves the object while applying paint from both sides. It is generally configured to spray.

[Problem to be solved by the invention]

However, such a coating apparatus has a problem in that the outer surface of the object to be coated cannot necessarily be finished to a smooth surface. This is thought to be because the paint applied to the vertically extending portion of the outer surface flows down due to factors such as gravity, making the film thickness uneven in this portion.

The present invention was made in view of the above circumstances, and it is an object of the present invention to provide a coating apparatus that can finish the outer surface of an object to be coated to a smooth surface.

[Means to solve the problem]

The coating device according to the present invention is provided with a conveyor device in a tunnel-shaped device main body provided with a preheating drying chamber on the exit side, and the conveyor device is rotatable around a support shaft that horizontally supports the object to be coated. In addition, a support shaft driving means for rotating the support shaft within the preheating drying chamber is provided.

[Effect]

In the present invention, the object to be coated rotates after the coating is placed, and the direction of gravity acting on the undried paint film changes, so the undried paint film flows so that its thickness is evened out, and the state The undried paint film will begin to dry.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a coating apparatus according to the present invention with a part of the apparatus main body 1 cut away. This apparatus main body 1 has a floor surface 1a and a wall surface 1b that slopes up from the floor surface 1a, and has a tunnel shape as a whole, with a coating chamber 1e formed on the entrance side and a preheating drying chamber on the exit side. 1f is formed. The painting room 1e is provided with a conveyor device 1c on the floor 1a and a paint gun device 1d on the wall 1b.

This conveyor device lc passes through the coating chamber 1e, passes through the outlet of the preheating drying chamber 1f, and extends to a drying oven (not shown). The large arrow A in the figure indicates the conveyance direction of the conveyor device IC. In this embodiment, the painting chamber 1e is made symmetrically between the entrance and the exit, so the latter half of the painting chamber 1e is shown in FIG. It shows. B is a fuel tank of a motorcycle as a box-shaped object to be painted.

As shown in FIG. 2, the conveyor device IC consists of a conveyor chain 2, its guide cover 2a, and legs 2b that support the guide cover 2a.

The conveyor chain 2 is provided with a support jig 3 for supporting the fuel tank B.

This support jig 3 includes a base part 3a fixed to the conveyor chain 2, and a support arm pivotably supported by a pin 4a arranged on the base part 3a toward the flow direction of the conveyor device IC. The support shaft 3c is rotatably supported by the support arm 3b and supports the fuel tank B at its tip end. The support arm portion 3b is swung between a substantially upright position and a substantially horizontal position by a support arm drive means 4, which will be described later, and can be held in a stopped state at the end of the swing. The support arm driving means 4 is configured to swing the support arm 3b in conjunction with the operation of the conveyor device 1c. That is, the support arm driving means 4 is driven by the pin 4a and the roller 4b provided on the support arm 3b.
and a guide rail 4C arranged on the side of the guide cover 2a. The guide rail 4c extends torsionally around the pin 4a along the axis of the pin 4a, and when the guide rail 4c is on the side C of the guide cover 2a, the support arm 3b stands substantially vertically; Guide rail 4c
is twisted 90" upwards from that position, the support arm 3b becomes almost horizontal. Therefore, in conjunction with the operation of the conveyor device 1c, the support arm 3b can be moved between an approximately upright position and an approximately horizontal position. It oscillates between.

Reference numeral 5 denotes a support shaft driving means for rotating the support shaft 3c within the preheating drying chamber 1r. This support shaft driving means 5 is a controller. The support shaft 3c includes a fluid-operated cylinder 5a attached to a portion corresponding to the preheating drying chamber 1'' of the bare device 1c, a guide rail 5b that is raised and lowered by the fluid-operated cylinder 5a, and a roller 5c that is driven by the roller 5c. It consists of a rack 5d that meshes with a pinion 5e provided in the
The rack 5d is movably supported in a direction perpendicular to the support shaft 3c and included in a plane in which the support arm 3b swings. The guide rail 5b is a fluid operated cylinder 5a
When inactive, the guide bar 2a extends laterally, and in front and behind thereof are rails 5h extending in the front-rear direction for guiding the rollers 5C in front and behind the guide rail 5b.

That is, when the support jig 3 is moved by the conveyor chain 2 and the roller 5c reaches the guide rail 5b from the entrance side rail 5h, the fluid actuation cylinder 5a is activated and the guide rail 5b is raised and lowered together with the roller 5c. the result,
Since the pinion 5e is rotated by the rack 5d, the fuel tank B rotates together with the support shaft 3c driven by the pinion 5e. Here, the vertical stroke of the guide rail 5b is set to rotate the support shaft 3c by 90'' in the left and right directions.

The rail 5h is bent so that its height changes at a location indicated by E in FIG. 1 within the painting room 1e.

Therefore, when the support jig 3 moves and the roller 5C passes through this part, the rack 5d moves vertically and the support shaft 3
C rotates, and fuel tank B slowly rotates. Note that within the operating range of the guide rail 5b, the rotational movement of the fuel tank B is maintained even if the conveyor device IC stops.

As shown in FIG. 1, the coating gun device 1d has a coating chamber 1.
3 extending above the conveyor device IC from the wall surface 1b forming the
It consists of a real rail 7 and a coating gun 7a attached to the lower surface of the rail 7 and slidably provided along the rail. In addition, in the figure, the small arrow F indicates the moving direction of each painting gun 7a.

In the coating apparatus configured in this way, the conveyor device IC is operated and the fuel tank B is attached to the tip of the support shaft 3C with the support arm 3b standing upright. Immediately after the conveyor device 1c continues to move and the fuel tank B enters the tunnel-shaped coating chamber 1, the support arm portion 3b is brought down to a nearly horizontal position by the support arm portion driving means 4, and the fuel tank B is moved from the rail 7. When the support shaft 3C reaches the lower side, the support shaft drive means 5 starts rotating the support shaft 3C. At the same time, the paint gun 7a injects paint toward the fuel tank B while moving along the rail 7. In this way, the coating gun 7a sprays the paint onto the outer surface of the fuel tank B while reciprocating and finishes the coating.

When the fuel tank B is transported into the preheating drying chamber If, the roller 5C engages with the guide rail 5b from the rail 5h. At this time, the fluid actuating cylinder 5a operates and the guide rail 5b moves up and down, so that the fuel tank B is held horizontally and moves rearward while rotating alternately in the left and right directions.

When the fuel tank B is further transported and the roller 5C comes off the guide rail 5b and engages with the rear rail 5h again, the rotation of the fuel tank B stops.

Thereafter, the roller 4b passes through the twisted portion of the guide rail 4C and the support arm 3b stands upright, so that the fuel tank B is transported to a drying oven (not shown) in an upright state.

Therefore, when the paint is not dry after painting,
Paint can be dried while rotating the fuel tank B. Therefore, it is possible to dry the undried coating film while equalizing its thickness, so that the outer surface of the fuel tank B can be finished smoothly. This is because the rotation of fuel tank B changes the direction of gravity acting on the undried paint film, which causes the undried paint film applied in the form of minute particles to flow to an average thickness. However, this is because drying is performed while maintaining this state and flow is prevented.

Further, in this embodiment, since the support arm portion 3b is swung between a substantially upright position and a substantially horizontal position by the support arm drive means 4, the conveyor device IC has a width other than the portion to be painted. can be narrowed, and its installation area can be reduced. In addition, since the fuel tank B is moved horizontally and rotated in conjunction with the operation of the conveyor during the painting process, the paint gun device 1 has a relatively simple configuration.
d also allows the entire outer surface of the box-shaped fuel tank B to be coated evenly.

In the above embodiment, an example was explained in which the support shaft drive means 5 of the support shaft 3c was configured using the fluid actuated cylinder 5a, but the present invention is not limited to this, and any means may be used. Can be adopted. That is,
The guide rail 5b may be bent in the same way as the point shown by E on the rail 5h, or a pair of upper and lower rank devices 5f may be provided at required points on the side surface of the guide cover 2a, facing each other, as shown in FIG. It is also possible to transmit the rotation of the gear 5j meshing with the rack device 5f to the support shaft 3C via a chain or other transmission device 6, so that the support shaft 3c is rotated alternately left and right.

〔Effect of the invention〕

As explained above, according to the present invention, a conveyor device is provided in a tunnel-shaped device main body in which a preheating drying chamber is arranged on the exit side of a coating chamber, and a support for horizontally supporting the object to be coated is provided on this conveyor device. Since the shaft is rotatable around the longitudinal axis and a support shaft driving means is provided to rotate the support shaft in the preheating drying chamber, it is possible to remove the object to be painted even when the paint is not yet dry after painting. Paint can be dried while rotating.

Therefore, as the object to be coated rotates, the undried coating fluid flows so that its thickness becomes even, and dries in this state. That is, since the undried coating film can be dried while its thickness is evened out, the outer surface of the object to be coated can be finished smoothly.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of a coating device according to the present invention, Fig. 2 is a partially cutaway perspective view of the main parts, and Fig. 3 is a main part of another embodiment. The second part shows the
FIG. 1...Device body, IC...Conveyor device, 1d
...Painting gun device, 1e...Painting room, 1f...
,・Preheating drying room, 2・・・Conveyor chain, 3・
...Support jig, 3a...Base part, 3b...Support arm part, 3C...Support shaft, 7a...Painting gun. Figure 2

Claims (1)

[Claims] A conveyor device is installed between the entrance and the exit of the tunnel-shaped device body, which has a coating chamber on the entrance side and a preheating drying chamber on the exit side, and the objects to be coated are placed horizontally on the conveyor chain of this conveyor device. A coating apparatus is provided with a support shaft that supports the support shaft in a direction, and a support shaft drive means that rotatably supports the support shaft around the shaft and rotates the support shaft within a preheating and drying chamber.