JPH0725248Y2 - painting booth - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a coating booth, in particular, a tunnel-type coating, which has a pair of flow plates below the coating area and is provided with a mechanism for removing the paint mist by the Venturi effect. Regarding the booth.

The coating booth of the present invention is particularly used in the coating process of automobiles or parts thereof.

(Prior Art) Conventionally, tunnel-type painting booths used for automatic flow painting of automobile bodies are generally tilted in the opposite directions below the painting area in order to remove paint mist generated in the painting area. Water and the like are allowed to flow down on a pair of flow plates, and a fan outside the booth sucks air into the lower area, so that the paint mist is absorbed by water in the elongated opening formed by the lower ends of both plates by the Venturi effect. It has a mechanism to remove it.

Such a coating booth is usually provided with a pair of flow plates in the longitudinal direction of the coating booth over almost the entire area of the booth, and further, as a mechanism for supplying water to the both flow plates, two water storage tanks communicating with the upper edge of each plate are provided. The channel is provided so as to extend in the longitudinal direction of the coating booth, and a supply pipe from a water supply source is provided so as to be introduced into the water storage channel at an appropriate interval, for example, every 3 or 4 m.

(Problems to be solved by the invention) Therefore, in order to optimize the effect of removing paint mist, water is made to flow down uniformly over the entire surface of both flow plates to achieve the desired water-air ratio over the entire booth. It is necessary to be able to get it. If the amount of water flowing through the plate is remarkably uneven, or if there is a part of the flow plate where no water flows, the paint mist cannot be removed satisfactorily, and thus the quality of the coated product deteriorates significantly. .

However, in the past, due to the reason of piping, it was necessary to provide an appropriate number of outlets of the water supply pipe in a long water storage channel with a space between them, so a large amount of water flows near the outlet due to the force of the supply water pressure. While flowing down on the plate, there is a problem that the amount of water flowing down on the flow plate becomes relatively small in the portion between the outlets, and sometimes water may not flow.

Therefore, some proposals were made to make the flow of water uniform over the entire surface of the flow plate. As a typical solution among them, Japanese Utility Model Laid-Open No. 56-176084 discloses a technique in which a lid that can freely adjust the area of the opening of the water channel is provided above the guide water channel on the upper end side of the flow plate.

Certainly, in the technique described in the above publication, the lid functions to regulate the flow of water supplied from the water supply port, so that the thickness of the falling water film on the flow plate can be made substantially uniform.

However, the technique is to cover the guide water channel with a heavy lid made of iron plate and a large number of lids over the entire length of the booth.Therefore, remove each lid when inspecting and cleaning the inside of the channel. However, it has a drawback that maintenance work is troublesome.

Therefore, there has been a demand for a means capable of making the thickness of the falling water film on the flow plate uniform without covering the water channel with a lid or the like.

An object of the present invention is to provide a coating booth capable of uniformly forming a water film flowing down over the entire surface of a flow plate and easily performing maintenance work such as inspection and cleaning.

(Means for Solving the Problems) In a coating booth according to the present invention, a pair of inclined flow plates, a venturi portion on the lower end side of the plate and a water storage channel on the upper end side of the plate are provided extending in the longitudinal direction of the coating booth. Along with this, a water supply pipe is introduced into the water storage passage, and the water storage passage is composed of a shallow portion on the side opposite to the shallow part on the flow plate side, and a rectifying plate is introduced into the outlet of the water supply pipe. Or a deep side wall facing the outlet is used as a straightening vane.

The coating booth of the present invention has a pair of flow plates that extend in the longitudinal direction of the coating booth and extend downward in the longitudinal direction of the coating booth at the lower side of the coating area, as in the conventional structure. The venturi portion having an elongated opening is formed in the longitudinal direction of the booth, and the water storage channel communicating with the upper ends of both the plates is extended in the longitudinal direction of the booth.

In this painting booth, a step is provided at the bottom of the reservoir, a shallow part is formed on the flow plate side and a deep part is formed on the opposite side, and the water supply pipe connected from the water source is normally fixed in the deep part of the reservoir. And the flow straightening plates are provided facing the respective outlets of the supply pipe.

Just like the murmuring, the shallows will soften the swells and turbulence of water toward the flow plate from the deep part, and soften them to the extent that the water flow can be adjusted so that the water surface does not ruffle. It may be a shallow portion, for example, a depth of about 10 cm or less, preferably 2-3 cm, and a distance of at least 30 cm from the upper edge of the flow plate. The bottom surface of the shallow portion is not limited to a flat surface, and may be a corrugated surface or a surface forming fine steps. Also, it is more convenient for the shallows to have all of their upper edges in communication with the flow plate at the same height.

Further, the current plate may be a member that stops the momentum of the supply water, softens and regulates the flow of water, and for example, a metal plate material having a U-shaped cross section can be used. The baffles are provided in the depth, preferably towards the bottom, usually about 5 to 15 cm away from the outlet of the water supply pipe. Alternatively, when the water supply pipe is introduced from the side of a relatively small depth,
The deep side wall may be used instead of the straightening vane.

A fan and the like for sucking air into the coating area and the area below the coating area are also installed in the main coating booth as in the conventional case.

(Operation) In the present invention, the force of the water flowing from the outlet of the water supply pipe to the deep part of the water storage channel is suppressed to some extent by the straightening plate or the deep side wall facing the outlet, even if it is strong, and the pressure is weakened. It becomes a water flow and is supplied to the shallow part on the side of the flow plate, then the water flow is further softened in the shallow part, the water surface becomes almost rippling, and the water rectified in this way flows to the flow plate surface. Supplied,
It flows down to the Venturi club. Therefore, the water flowing down on the flow plate becomes uniform over the entire surface of the flow plate regardless of whether it is near the outlet of the water supply pipe.

Moreover, the coating booth of the present invention mainly creates a rectifying action of the supply water by designing the depth of the water storage channel, and the lid, especially the lid having an adjustable opening area as described in the above publication, is intentionally provided. It is not necessary to install it on the upper part of the reservoir. Therefore, during inspection and cleaning of the water storage channel, the troublesome work of removing and reattaching the lid is not bothered.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

Embodiment 1 As shown in FIG. 1, a coating booth 1 of this embodiment relates to an automobile tunnel type coating booth, and an upper area (not shown) for air rectification, a central coating area 2 and a lower area. It is composed of the area 3, and the fan 17 is connected to the area 3 in the lower part.

The lower region 3 is provided with a pair of flow plates 5 and 5 that are inclined in opposite directions extending in the longitudinal direction of a coating booth having a length of about 100 m, and has a venturi portion 4 composed of an elongated opening at the lower end side of the plate 5. A reservoir 6, which is formed and communicates with the upper edge of the plate 5 on the one hand,
6 are provided on both left and right sides of the booth so as to extend in the booth longitudinal direction. Furthermore, on the lower side of the flow plate 5 etc.,
The water recovery channel 16 is provided long in the longitudinal direction of the booth.

As shown in FIG. 2, the water storage channel 6 has a stepped bottom and is composed of a shallow portion 8 (depth 5 cm or less) on the flow plate side and a deep portion 9 on the opposite side. Then, a water supply pipe 7 connected to a water supply source (not shown) is introduced into the deep portion 9 from below, the outlet 11 thereof is exposed from the bottom surface 12 of the deep portion, and the straightening plate 10 having a U-shaped cross section is provided. It is provided so as to face the exit 11.

Thus, at the time of painting the automobile 18, water is supplied from the supply pipe 7 to the deep portion 9 of the water storage channel and then stored in the shallow water portion 8 and then made to flow down on the flow plate 5 in the direction of the arrow F, while the fan 17 By sucking air in the lower area 3 as indicated by the arrow f by the operation, the paint mist generated in the coating area 2 is absorbed by water in the venturi section 4, and the absorbed water is collected in the recovery passage 16, This removes the paint mist.

In the present embodiment, the rectified water having no water surface is supplied to the surface of the flow plate 5 from the shallow portion 8, and the flow of the water is intermediate between the outlet 11 and the outlet 11 of the supply pipe 7. There was no difference at any point, and it was uniform over the entire surface of the plate 5.

Embodiment 2 In this embodiment, as shown in FIG. 3, in the water storage channel 6a, the water supply pipe 7 is laterally introduced into the deep portion 9 so that the outlet 11 is slightly exposed from the side surface 13, and the straightening vane 10 is provided. Exit 11
It is provided opposite to. Other configurations are the same as those in the first embodiment.

Also in this example, the flow of water flowing down to the surface of the flow plate 5 could be made uniform over the entire surface of the plate 5.

Example 3 In this example, as shown in FIG.
In the case where the water supply pipe 7 is slightly narrow, the water supply pipe 7 is introduced into the deep portion 9 from the side, and the outlet 11 is exposed from the side surface 13 and is close to the side wall 14 facing the outlet. That is, instead of the straightening vane 10, the deep side wall 14 is used. And further, the sidewall 14
A rectifying auxiliary piece 15 is attached to the upper end of the by bending to the deep side. Other configurations are the same as those in the first embodiment.

Also in this embodiment, the flow-down water on the flow plate 5 could be made uniform over the entire surface of the plate 5. The side wall 14 can also suppress the force of the water flowing in from the supply pipe 7, and in particular, the auxiliary piece 15 not only makes the rectifying action more effective, but also the supply water immediately flows into the shallow part 8. It helped to control.

(Effect of the Invention) As described above, in the coating booth of the present invention, the force of the water flowing into the reservoir is weakened first by the straightening vane or the deep side wall and then by the shallow part on the flow plate side so that it does not become ruffled. Since it has a structure that can supply the rectified water to the flow plate surface, the flow of water flowing down on the flow plate is made uniform over the entire surface of the flow plate regardless of whether it is near the outlet of the water supply pipe. be able to.

Moreover, the coating booth of the present invention has a structure that creates a rectifying function of the supply water by designing the depth of the water storage channel and does not require a lid whose opening area can be freely adjusted at the top of the water storage channel. Maintenance work can be easily performed without troublesome work of removing and reattaching the lid when inspecting or cleaning the road.

[Brief description of drawings]

FIG. 1 is a view showing a coating booth according to an embodiment of the present invention, FIG. 2 is an enlarged view showing the vicinity of a reservoir of the coating booth shown in FIG. 1, and FIGS. It is an enlarged view which shows the water storage channel vicinity of the coating booth of an Example, respectively. In the figure, 1 ... Painting booth 4 ... Venturi section 5 ... Flow plate 6, 6a, 6b ... Reservoir 7 ... Water supply pipe 8 ... Shallow section 9 ... Deep section 10 ... Rectifier plate 11 ... Outlet 14: Deep side wall facing the outlet F: Downward direction of water f: Direction of air flow

Claims (1)

[Scope of utility model registration request] 1. A pair of inclined flow plates, a venturi portion on the lower end side of the plate, and a water storage channel on the upper end side of the plate are provided extending in the longitudinal direction of the coating booth, and a water supply pipe is introduced into the water storage channel. In the coating booth consisting of the above, the water reservoir is composed of a shallow part on the side opposite to the shallow part on the flow plate side, and a straightening plate is provided facing the outlet of the water supply pipe introduced into the deep part or facing the outlet. The painting booth is characterized in that the deep side walls are replaced with straightening vanes.