JPH0677708B2 - Conveyor cart type painting boots - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a paint booth for forcibly discharging paint mist scattered by spray painting to the outside through a duct.

Conventional technology The coating booth is roughly divided into a dry type (dry type) and a water washing type (wet type). In a typical dry type coating booth, plate-like curtains (baffle plates) are arranged alternately. The air in the booth is exhausted through the gap. When the paint mist contained in the exhaust gas passes through this gap, its speed is increased and it collides with the next curtain, and adheres to the collision surface and is removed. However, since this dry type coating booth has a limit to mist removal and requires a long time for cleaning, cleaning work must be performed at midnight or on holidays outside the coating work time. Cleaning has problems such as poor workability and inefficiency.

The water-washing type painting booth is suitable for long-term use due to the large amount of coating, and it adsorbs paint mist on water particles to form sludge, which is treated separately. Mitsuko Sho 54-14766 "Water Curtain Type Painting Booth", Mitsuko Sho 36-29687 "Water Washing Painting Room", Mitsuko Sho 3
No. 1-9484 "Water-washing booth" proposes various methods for improving the coating booth using a water film (water curtain) that flows down in a direction substantially perpendicular to the air flow after spraying the paint. When the amount of water in the water film is small, the paint mist breaks the water film and adheres to the wall and grows gradually. Therefore, a large amount of water is required and the paint must be immediately removed when the paint adheres.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention An object of the present invention is to enable a process of removing paint adhering to a curtain and a process of replacing the curtain to be performed in parallel with the painting work, and to shorten the process. To provide a booth.

Another object of the present invention is to provide a coating booth in which cleaning and replacement of the curtain can be performed quickly and easily and the effect of removing the paint mist is not reduced.

Means for Solving the Problem and Its Effect In the coating booth according to the present invention, a large number of divided curtains are removably suspended from a flat loop-shaped transport rail,
The divided curtains are arranged in two rows in the front and rear, and are alternately overlapped so that the divided curtains in the rear row are positioned in the gaps between the adjacent divided curtains in the front row. It is arranged outside the painting booth from the exit door provided until it reaches the entrance door, and the cleaning and replacement of the divided curtain can be done outside the painting booth. I am trying.

According to the present invention based on such a configuration, since a large number of divided curtains move on a flat loop-shaped transport rail, the curtain located on the back surface of the object to be coated adsorbs the paint mist and the removal effect reaches its limit. At this point, an entrance door and an exit door provided on the housing can be opened to transfer the divided curtains to the rear one by one to supply a new curtain. Since the transfer work can be executed in a short time, the curtain can be replaced without interrupting the coating work by spray injection.
The used curtain sent to the rear is cleaned while being hung from the transport rail or removed from the transport rail. Items that cannot be reused even after cleaning should be discarded and replaced with new ones. Since this series of work can be performed in parallel with the painting work, the whole process is shortened and overtime work is unnecessary. Since the cleaning and replacement of the curtain can be carried out quickly and easily, it is not necessary to continue to use the curtain whose paint mist removal effect has been lowered until the painting work time ends, which is useful for environmental hygiene and pollution prevention.

The divided curtain can be composed of a plate-like or columnar member, and are arranged so as to be alternately arranged in two rows in the front and rear.

At least half of the transport rails should be located outside the coating booth. Various cleaning mechanisms can be arranged at this position as a cleaning exchange station.

Further, it is desirable to arrange a water shower and an eliminator, which are provided in the conventional water-wash booth, in the coating booth to prevent discharge of contaminated air.

Other features and advantages of the present invention will be apparent from the following description with reference to the embodiments of the accompanying drawings.

Embodiment FIG. 1 schematically shows the whole of a transfer curtain type coating booth 10 according to a preferred embodiment of the present invention, in which a large number of objects W are suspended from a conveyor 13 in a housing 12 on the back surface of the object W to be coated. The divided curtains 14 and 15 (the upper half of which is omitted for the sake of clarity) are arranged upright in a state of being alternately stacked in two rows in the front and rear. Each of the divided curtains is detachably suspended from a flat loop-shaped transport rail 16, and moves either along the rail by itself or by being driven by a conveyor. In this embodiment, a drive motor 18 is attached to the transfer rail 16 to form a transfer conveyor,
The divided curtains 14 and 15 are suspended and moved from a predetermined position on the transfer rail.

In the transport rail 16, only one side of the loop formed in a substantially rectangular shape passes through the inside of the housing 12, and the remaining portion is arranged outside the housing. Illustration of the support member of the transport rail is omitted. An entrance door 20 and an exit door 22 are provided at positions where the divided curtains 14 and 15 penetrate the housing 12, respectively, to prevent leakage of internal air from the entrance and the exit.

A lighting device 26 such as a fluorescent lamp is arranged on the ceiling of the coating room 24 which is the front surface of the object W to be coated, and a drainboard 28 is provided on the floor surface. The paint mist that has dropped after passing through the drainboard 28 is collected in a water tank 30 provided under the floor, pumped up by a circulation pump 32, and sent to a circulation pipe 34.

An exhaust fan 36 for sucking and discharging air from the inside of the coating booth is arranged at the upper part of the housing 12, and baffle plates 38, 39 for guiding the air flowing upward are provided at the upper rear parts of the divided curtains 14, 15. And a water shower device 40 for collecting paint mist, and an eliminator 42 for draining water and collecting paint mist again above it, and its inspection door.
44 are arranged.

2 to 4 show a method of connecting the conveyor 50 inside the transport rail 16 and the divided curtains 14 and 15, in which a hanger 54 for the divided curtain is suspended from a hanger 52 on the conveyor side, and the hanger 54. Slotted hole at the end of the split curtain
It is inserted in 56 and is removable. As shown in the drawing, the hanger 54 is bent in a hook shape, whereby the divided curtains 14 and 15 are alternately stacked so that the curtains 15 in the rear row are located in the gaps between the adjacent curtains 14 in the front row ( (Fig. 1).

Next, the operation of the coating booth 10 will be described. When the exhaust fan 36 is activated to suck the air in the coating booth 10,
The air in the coating chamber 24 passes through the gap between the divided curtains 14 and 15 and carries the paint sprayed from the spray gun G. The paint mist first collides with and adheres to the divided curtains 14 in the front row, but the paint mist toward the gap between the curtains 14 is accelerated in speed as it passes through the gaps and collides with the divided curtains 15 in the rear row to adhere. Most of the paint mist is collected here, but the remaining mist is entrained in the air and baffles 38,39
Flow along with the water, and when it passes through the water shower device 40, it is adsorbed by water and drops into the lower tank 30. Furthermore, an eliminator consisting of a residual paint mist and a flat plate with water in a grid pattern.
Only the air, which contains almost no paint mist, is discharged from the exhaust fan 36 while being bent and flowing between 42.

If the paint mist adheres to the surface of the divided curtains 14 and 15 and becomes laminated, the removal effect will decrease, so the surface of the curtains can be visually confirmed or the divided curtains 14 and 15 can be placed on the conveyor after a predetermined working time has elapsed. It is moved along and the new divided curtain is positioned on the back surface of the object W to be coated. The used divided curtains are sequentially discharged to the outside of the housing 12, and a predetermined cleaning / replacement station (not shown) performs cleaning work with, for example, a rotating brush, or removes them from the hanger 54 and replaces them with another curtain. Wash or discard the removed one. If the split curtain is of a type that can be used on both sides, it can be easily regenerated by simply switching the front and back sides after use.

In the above embodiment, the divided curtains 14 and 15 are shown as a flat plate having two rows of front and rear, but a columnar or prismatic member other than a flat plate may be used, or they may be arranged in one row or three rows or more.

Effects of the Invention As described in detail above, the transport rail type coating booth of the present invention provides the following advantages.

1) Since a large number of divided curtains can be moved on the transport rail and can be attached and detached, they can be replaced quickly and easily.

2) Since the replacement of the curtain is completed in a short time, it is almost unnecessary to interrupt the painting work by spray injection, and workability is greatly improved.

3) By moving backward on the transport rail, the divided curtain can be washed without removing it, and the back side of the curtain can also be washed.

4) Since the cleaning and replacement of the curtain can be performed in parallel with the painting work, the entire process is shortened and overtime work is unnecessary.

5) Since the curtain whose paint mist removal effect has deteriorated can be immediately replaced with a new one, a paint booth useful for environmental hygiene and pollution prevention can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a transport curtain type coating booth according to an embodiment of the present invention with a part thereof broken away, and FIG. 2 is a partial front view showing a connecting portion between a conveyor and a divided curtain inside a transport rail. FIG. 3 is a right side view of FIG. 2, and FIG. 4 is a perspective view showing a relationship between the split curtain hanger and a hanger. 10 …… Painting booth, 12 …… Housing 14,15 …… Split curtain 16 …… Transport rail, 18 …… Drive motor 20 …… Inlet door, 22 …… Exit door 24 …… Painting room, 36 …… Exhaust fan 40 …… water shower, 42 …… eliminator 50 …… conveyor, 52 …… hanging equipment 54 …… hanger, 56 …… oblong hole G …… spray gun, W …… coated object

Claims (2)

[Claims] 1. In a coating booth of a type in which a dry or wet curtain is arranged on the back surface of an object to be coated, a large number of divided curtains are detachably suspended from a flat loop-shaped transport rail, and the divided curtains are They are arranged in two rows in the front and rear, and are alternately overlapped so that the divided curtains in the rear row are located in the spaces between the adjacent divided curtains in the front row, and at least half or more of the transport rails are provided in the housing of the coating booth The transfer curtain is arranged outside the painting booth from the time when the door exits until the entrance door is reached, and the cleaning and replacement of the divided curtain can be performed outside the painting booth. Type painting booth. 2. Each divided curtain is provided with at least two oblong holes in an upper portion thereof, and a tip of a hanger suspended from the transport rail is inserted into the oblong holes to be detachable. The coating booth according to claim 1.