JPH0153591B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is used, for example, when painting automobile bodies, and more specifically, a ventilation body for collecting excess spray paint mist is installed on the floor surface where a cleaning water film is formed. This invention relates to a painting booth having a discharge port formed therein.

Conventionally, in this type of painting booth, as shown in FIG. 8, a small exhaust port 20' is formed in the center of the floor surface 19 to exhaust ventilation gas. Painted object A such as body
was stopped so that its center was located directly above the exhaust port 20' and painted.

However, when using this conventional booth, as is clear from the figure, the flow path of ventilation gas below the object to be coated is sharply curved, and in particular, as shown in FIG. In the case of transporting the material by placing it on a trolley, the trolley and the conveyor that transports the trolley become obstacles, creating a significant vortex in the flow of ventilation gas below the object to be coated, resulting in excess spray paint mist. In order to quickly and smoothly discharge the ventilation gas along with the ventilation gas, it is necessary to increase the flow rate (flow rate) of the ventilation gas, which has the disadvantage of requiring large and large capacity air supply fans and exhaust fans for the ventilation gas. be.

The present invention has an object to overcome such conventional drawbacks.

The characteristic configuration of the coating booth according to the present invention, which was taken to achieve the above object, is that the discharge ports are distributed in the circumferential direction at least immediately below or near the outer periphery of the transfer-stopped coating in plan view. The functions and effects are as follows.

In other words, by setting the covering so that its outer periphery is located directly above or near the exhaust ports distributed in the circumferential direction in plan view, ventilation gas can be circulated to the underside of the covering. Even if there is the above-mentioned trolley or conveyor below the covered object, the ventilation gas can flow straight to the exhaust port without being obstructed by them. Let me,
The occurrence of vortices in the airflow below the covering can be greatly reduced.

Therefore, according to the present invention, while reducing initial and running costs by downsizing and reducing the capacity of the air supply fan and exhaust fan, ventilation gas, that is, excess spray paint mist, can be quickly and smoothly discharged. This allows
A booth for the objects to be coated is necessary to avoid the problem of residual paint mist from the previous painting of objects adhering to the objects to be coated this time when the objects to be coated are brought into the booth in batches. We have been able to shorten the waiting time for delivery to the warehouse and improve work efficiency.

Examples of the present invention are shown below.

As shown in FIG. 1, a car body A (an example of an object to be coated) is placed on a trolley 2 that is driven and moved via a chain conveyor 1, and dust attached to the car body A is removed on the route of transport. Preparation booth 3 for removal and automobile body A in a stopped state of transfer
A coating booth 5 that applies the paint via a plurality of robots 4, a setting booth 6 that naturally evaporates the solvent in the paint film to stabilize the paint film so that it does not sag, and a transfer stop. Finishing booths 9 for finishing car bodies A in a state of being coated via a plurality of robots 7 are arranged in the order of description from the top to the bottom of the transfer to constitute the painting equipment.

In the painting booth 5, as shown in FIG. 2, ventilation air for collecting excess spray paint mist from an air supply fan 10 is blown downward from the entire surface of the ceiling through a filter 11 and a punched metal plate 12. Upper chamber 13 for supplying air
and the upper chamber 13 from the air supply fan 10
The ventilation air sent through the filter 14
and side chambers 16, 16 for supplying air that blows out laterally inward from the lower half of the left and right side wall surfaces through the punched metal plate 15. The ventilating air outlet 20 is formed on the floor surface 19 on which the cleaning water film 18 is formed, and the surplus spray paint mist is collected by the ventilating air and discharged to the outside.

In addition, in the painting booth 5, ventilation air from the exhaust port 20 is routed through a straight path 22 to an exhaust route from the exhaust port 20 to the suction/exhaust fan 21.
A first paint mist removal section that makes water catch and remove paint mist in the ventilation air by making it flow directly downward at high speed and collide with the water surface in the water tank 23 using the difference in inertial mass. 24 and this first
By causing the air to flow down at high speed along the curved path 25 together with the cleaning water from the paint mist removal unit 24 to generate centrifugal force, small-diameter paint mist in the air is captured by the flowing water by utilizing the difference in inertial mass. A second paint mist removing section 26 for removing paint mist is arranged in parallel in the horizontal direction, and the ventilation air is configured to remove and discharge paint mist.

As shown in FIG. 3, a plurality of the discharge ports 20 are arranged in parallel at appropriate intervals in the direction of conveyance by the conveyor 1, and are slits whose lateral length is approximately equal to the width of the automobile body A. The parts located at both ends in the juxtaposition direction are located close to both front and rear edges in a plan view of the automobile body A stopped at the painting position, and the other parts are: Both ends in the longitudinal direction are located directly below both left and right edges in a plan view of the automobile body A stopped at the painting position. In other words, the stopped automatic body A is distributed in the circumferential direction near the outer peripheral edge in a plan view of the stopped automatic body A, and
It is arranged so that it is distributed directly under the The slit-shaped discharge port 20 is formed to have a width in the upper and lower directions, and the width in the transfer direction gradually narrows as it goes downward.

A pipe 27 supplies cleaning water to the floor surface 19 to form a cleaning water film 18.

According to the configuration of the above embodiment, ventilation air can be discharged not only directly below the outer peripheral edge of the automobile body A, but also at a position directly below the automobile body A, so that excess spray paint that has entered under the automobile body A through gaps in the automobile body A, etc. The mist can also be discharged quickly and smoothly without being locally accumulated below the car body A, and the discharge port 20 is not located laterally outward from the position directly below the outer periphery of the car body A. Therefore, it is possible to prevent excess spray paint mist from scattering laterally outward of the automobile body A and from adhering to the painting robot 4 .

Another example is shown below.

The discharge ports 20 are disposed in a circumferential direction directly under or near the outer peripheral edge of the stopped workpiece A in a plan view, and are arranged in a distributed manner directly under the stopped workpiece A as shown in FIG. As shown in the figure, the discharge port 2 is circular (or rectangular) in plan view.
Place multiple 0's in parallel.

The discharge ports 20 are arranged in a circumferential direction directly under or near the outer peripheral edge of the stopped workpiece A in a plan view, and are arranged in a distributed manner directly under the stopped workpiece A, as shown in FIG. As shown in FIG. 1, a plurality of slit-shaped discharge ports 20 are arranged in parallel at appropriate intervals in the lateral direction along the direction in which the object to be coated is transported.

The discharge ports 2 are arranged in a circumferential direction directly under or near the outer peripheral edge of the stopped object A in a plan view, and are arranged in a distributed manner directly under the stopped object A.
0, as shown in FIG. 7, a slit-shaped discharge port 20 along the horizontal direction and a slit-shaped discharge port 20 along the transfer direction are arranged side by side.

This is carried out without providing the discharge port 20 directly under the stopped object A.

[Brief explanation of drawings]

1 to 4 show an embodiment of the painting booth according to the present invention, and FIG. 1 is a schematic plan view of the painting equipment;
FIG. 2 is a longitudinal sectional front view of the booth, FIG. 3 is an enlarged plan view of main parts, and FIG. 4 is a sectional view taken along the line -- in FIG. FIGS. 5 to 7 are enlarged plan views of main parts showing other embodiments. FIG. 8 is a schematic diagram of a conventional example. 18...washing water film, 19...floor surface, 20...discharge port.

Claims (1)

[Claims] 1. An exhaust port 20 for ventilation gas for collecting excess spray paint mist is provided on the floor surface 19 where the cleaning water film 18 is formed.
A painting booth in which the discharge ports 20 are arranged at least directly below or near the outer periphery of the object A to be transferred and stopped in a planar view and distributed in a circumferential direction. . 2. According to claim 1, the discharge port 20 is provided immediately below or near the outer peripheral edge of the transfer-stopped workpiece A in a plan view, and directly below the transfer-stoppable workpiece A. Painting booth as described.