JP2009136740A - Checking door of coating booth - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce costs and improve convenience of handling in a checking door which is opened/closed when checking the cleaning of inside a processing chamber of a coating booth for sucking coating mist together with a spray stream and performing collection processing. <P>SOLUTION: The checking door for closing an opening part provided at a part of a wall surface of the processing chamber of the coating booth installs engaging parts of the door near the upper part of the opening part, and has engaging pieces having a size to close the opening and placed at positions where the checking door closes the opening when hooked to the engagement parts. With this structure, the checking door is closely attached to the opening part by negative pressure inside the processing chamber by the operation of the coating booth. An airtight holding structure to be required for maintaining the negative pressure inside is applied to the contact part of the opening part and the door. The contact part of the periphery of the opening part and the checking door is provided with a packing member as an airtight holding means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a structure of an inspection door that is used in painting and opens and closes when cleaning and inspecting a processing chamber of a coating booth that sucks and collects paint mist together with an air current.

In the field of spray coating, the painting booth that sucks sprayed paint mist is widely used as an indispensable device from the viewpoint of keeping the paint environment clean and preventing discharge of paint mist to the outside. . In many cases, the painting booth is provided with a treatment chamber equipped with a treatment device for collecting mist, and the paint mist sprayed in the painting chamber by an exhaust fan is sucked into the treatment chamber together with an air flow to collect the paint mist. After that, it is configured to discharge clean air.

There are several methods for collecting the paint mist. In any case, the paint mist is gradually contaminated by the paint mist entering the processing chamber and needs to be cleaned periodically. In addition, it is necessary to periodically inspect the processing apparatus so that the collection processing apparatus can maintain the necessary functions, or to repair it when a failure occurs. Therefore, an inspection door is provided on a part of the wall surface constituting the processing chamber so that the processing chamber can be inspected, cleaned, repaired, and the like.

The inspection door is configured to reliably shut off the processing chamber and the outside during the operation of the painting booth so that unnecessary airflow does not flow into the processing chamber and cause a decrease in the performance of the exhaust fan. For this reason, when the inspection door is closed, it is fastened and fixed with a fastening screw member 21 such as a bolt or nut as shown in FIG. 7, or is fixed with a fastening tool 22 such as a lock handle or a handle hook. Yes.

The frequency of inspection is not generally determined, but if the frequency is high, it is desirable to adopt a handle type so that opening and closing or removal is easy. In this case, the equipment cost becomes a problem. In addition, when the frequency is low, it can be dealt with by simple bolting or the like, but there is a problem that the bolt is damaged due to the trouble of removal and in many cases rust caused by using water in the processing chamber.

An object of the present invention is to make the inspection booth of the painting booth a structure with reduced equipment cost, so that it can be easily opened and closed even during handling, and the burden on the operator can be reduced. .

An open / close door attached to an opening provided in a part of the wall surface constituting the processing chamber of the coating booth that sucks the paint mist together with the air current and collects it in the processing chamber has a size to shield the opening of the wall surface. And an engagement piece that engages with a locking portion provided in the vicinity of the opening, and is placed in a state where the periphery of the opening and the open / close door are in contact with each other when the locking portion of the opening is engaged. The contact portion has an airtight holding structure necessary for maintaining adsorption by the internal negative pressure of the processing chamber when the coating booth is operated.

A packing material is provided as an airtight holding means at the contact portion between the periphery of the opening and the inspection door, so that the airtightness can be easily maintained. In addition, the locking portion and the engagement piece can realize a necessary function at a low cost by a simple configuration using a locking hole and a hook member engaged with the locking hole.

The opening that is closed by the inspection door is placed in a state in which the engaging portion provided on the inspection door is hung on the engaging portion provided near the opening to close the opening. Therefore, opening / closing or removing / attaching the inspection door can be performed very easily. Further, during the operation of the painting booth, the inspection door is pressed against the opening by the internal negative pressure due to the suction of the exhaust fan, and is reliably shut off from the processing chamber, thereby preventing unnecessary suction into the processing chamber.

By providing a packing material as an airtight holding means at the contact portion between the periphery of the opening and the inspection door, the airtightness is reliably maintained, the performance of the exhaust fan is not impaired, and the pressing force is increased accordingly.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration diagram of a general water-washing type painting booth. The coating chamber 1 is a place where an object to be coated is placed and spray coating is performed, and the mist of the paint sprayed and not adhered to the object to be coated is sucked into the rear processing chamber 2. The processing chamber 2 is separated from the coating chamber by a front water flow plate 3 and is provided with a suction port 4 on the lower side and an exhaust fan 5 on the upper side.

In the case of the example in the figure, the spray particles sprayed into the coating chamber 1 by the operation of the exhaust fan 5 and not applied to the object to be coated are sucked into the processing chamber 2 while being sucked into the processing chamber 2. First, the sprayed particles collide with the front water flow plate 3 and are dropped into the lower water tank 6 together with the water flow. Further, the spray particles in the airflow that have passed through the suction port 4 are collected by a shower from the water washing nozzle 7 and dropped into the water tank 6 in the same manner.

A configuration in which fine paint mist and moisture containing moisture that could not be removed by washing with water are exhausted through an exhaust fan 5 after the paint mist and contained moisture are removed by an eliminator 8, a shielding plate 9, and the like. It has become. For this reason, the eliminator 8 and the like in the processing chamber 2 are in a situation where paint is attached or rust and corrosion are likely to occur due to long-term use, and periodic cleaning is required.

In addition, since the water from which the sludge from the paint mist taken into the water tank 6 has been removed is circulated and used by the pump, the water washing nozzle 7 cannot remove all of the fine paint sludge and dust, etc. Periodic inspection and cleaning are necessary to remove the harmful effects. Therefore, the inspection door 10 for that purpose is provided in advance so that the work is easy.

FIG. 2 shows a state in which the inspection door 10 is attached to the opening 11, and FIG. 3 shows a cross section in a state where the inspection door 10 is hooked on the opening 11 opened on the wall surface 12. The inspection door 10 is a plate having a size sufficient to sufficiently close the opening 11 of the wall surface 12, and a handle 13 that is held during attachment and removal is fixed. A hook-shaped hook 14 is fixed to the back side of the handle 13. At the upper part of the opening 11, a hole 15 of the locking part is provided at the position of the hook 14, and the hook 14 of the engagement piece is hung on this hole so that the inspection door 10 is attached at a position where the opening 11 is blocked. It is configured.

When the painting booth is operated in this state, the inside of the processing chamber 2 becomes negative due to the suction pressure of the exhaust fan, and the inspection door 10 is pressed against the opening 11 of the wall surface 12 by the external atmospheric pressure and is reliably shut off. . Naturally, when the operation is stopped, the pressure is released, and the inspection door 10 is simply hooked into the locking hole and can be easily removed. Therefore, no special operation is required, and the operation door is securely closed during operation, and the inspection door 10 can be easily removed during inspection.

In this case, the inspection door 10 is formed to have a size that covers the hole including the hole 15 of the locking portion. The contact portion between the periphery of the opening 11 and the inspection door 10 is in close contact so as to maintain airtightness. The means for close contact is not limited, but the flatness of each other is increased, close contact is made by using a highly flexible material for the contact portion, and packing 16 is attached to the contact portion as shown in FIG. It is also possible to increase the adhesion between the wall surface 12 and the inspection door 10 by intervening.

As for the size of the inspection door 10 and the airtightness around the opening, it is necessary to block the inside of the processing chamber 2, and if there is a locking hole 15 as described above, this is also closed. As described above, when the hook 17 is provided on the wall surface 12 side and the locking hole 15 is provided on the inspection door 10 side, only the airtightness of the opening 11 needs to be considered.

As another example, as shown in FIG. 6, it is possible to hook a bent portion 19 formed on the inspection door 10 side on a bent portion 18 formed with a locking portion on the wall surface 12. Only the part 11 needs to be closed by the door.

Further, in the case of FIG. 6, a support plate 20 to be inserted into the opening 11 is fixed to the lower part of the inspection door 10, and this support plate is inserted into the opening 11, and the wall surface 12 is interposed between the lower end of the inspection door 10. A part of it comes in. As a result, the inspection door 10 stays in the inserted position, and even if the wall surface on which the inspection door is provided is reversely inclined, the inspection door 10 is hung in a state supported by the locking portion formed by the upper bent portion 18 and the bent portion 19. In addition, the lower part is not separated from the wall surface and is not in an unstable state. Of course, the structure of the support plate 20 may be a structure in which a groove into which the lower end of the inspection door 10 enters is formed outside the wall surface 12.

Thus, in any state, the inspection door 10 can be placed at a position where the opening can be easily closed by simply hooking the engaging piece on the locking portion. Thus, the opening 11 is reliably blocked while being pressed from the outside by the negative pressure of the pressure, and the function and performance of the paint mist processing apparatus in the coating chamber are not impaired.
In this way, according to the present invention, the inspection door can be removed and attached very easily and quickly, reducing the burden on the operator, making the structure simpler than before, and reducing the equipment cost. Can be suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS Outline explanatory drawing explaining the structure of the coating booth in which this invention is used. Explanatory drawing in the case of attaching and removing the Example of the inspection door of this invention. Sectional drawing which shows the part which attached the Example of the inspection door of this invention to the painting booth. Sectional drawing of the inspection door which shows another Example of this invention. Sectional drawing of the inspection door at the time of providing packing in the Example of FIG. Sectional drawing of the inspection door which shows another Example of this invention. Explanatory drawing which shows the example of attachment of the conventional inspection door.

Explanation of symbols

1. Painting room
2, processing chamber 3, front water flow plate 4, suction port 5, exhaust fan 6, water tank 7, flush nozzle 8, eliminator 9, shielding plate 10, inspection door 11, opening 12, wall surface 13, handle 14, hook 15, Hole 16, packing 17, hooks 18, 19, bent portion 20, support plate

Claims (3)

In an opening / closing door attached to an opening provided in a part of a wall surface constituting the processing chamber of a coating booth that sucks a paint mist together with an air flow and collects it in the processing chamber, the opening / closing door shields the opening of the wall surface. An engaging portion that engages with a locking portion provided in the vicinity of the opening, and is placed in a state in which the periphery of the opening contacts the open / close door when engaged; Is a painting booth inspection door that has the structure of airtightness necessary to maintain the negative pressure inside the processing chamber. 2. The coating booth inspection door according to claim 1, wherein a packing material is provided as an airtight holding means at a contact portion between the periphery of the opening and the inspection door. The inspection door of the painting booth according to claim 1, wherein the locking portion and the engaging portion are formed of a locking hole and a hook member engaged with the locking hole.

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