JP2565637Y2 - painting booth - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a painting booth.

[0002]

2. Description of the Related Art When a paint is sprayed on an object to be painted, a part of the paint floats and stays in a coating chamber as a paint mist, and this adheres to the object to be painted and deteriorates the quality of a painted surface. It is known to have adverse effects. In order to solve this, for example, Japanese Patent Application Laid-Open No.
The painting booth shown in No. 3 has been proposed.

[0003] This coating booth forms an air curtain around an object to be coated by flowing air supplied from above the object to be coated downward, and an exhaust chamber and a coating machine arranged at a lower portion of the coating chamber. A paint mist generated at the time of coating is collected by a communicating portion with an exhaust duct provided on a wall surface facing the airbag, and is discharged from the exhaust duct to the outside. According to this coating booth, the paint floating in the coating chamber is effectively collected by the exhaust chamber and the communicating portion, so that the adhesion of the object to be coated to the coating surface is reliably prevented.

[0004]

However, in such a coating booth, it is necessary to form an air curtain extending downward around the object to be coated, so that the outlet of the air supply duct must be provided above the object to be coated. However, the following inconvenience has occurred. That is, when the temperature of the air in the coating room is low, or when the temperature of the outside air outside the air supply duct is low,
If air at a higher temperature is supplied from the air supply duct, the air may condense on the inner surface of the air supply duct near the outlet. As a result, the generated dew drops flow down the inside of the air supply duct and flow down from the outlet into the coating chamber, and adhere to the coating surface of the object to be coated which is disposed vertically below the outlet, resulting in poor coating. Inconvenience is considered.

If the air supplied from the air supply duct is directly applied to the object to be coated, there may be a problem that dust contained in the supplied air adheres to the object to be coated. In order to avoid this, even if a filter is arranged between the outlet and the object to be coated, it is conceivable that local contamination of the filter may occur. The inconvenience that dust falls on the object to be coated may be considered.

The present invention has been made in view of the above-mentioned circumstances, and has a painting booth capable of improving the quality of a painted surface when air is supplied from a ceiling of a painting room through an air supply duct. It is intended to provide.

[0007]

In order to achieve the above object, the present invention provides a coating chamber for spraying a coating material on a workpiece placed in a housed state, an air supply means for supplying air to the coating chamber, An air supply duct that connects the air supply means and the upper part of the coating chamber and blows air supplied from the air supply means into a coating chamber from an outlet provided on a ceiling of the coating chamber, and the coating chamber facing downward. Exhaust means for discharging the circulated air from below is provided, and a receiving means having a larger area than the outlet and capable of storing liquid is provided at intervals below the outlet. We propose a painting booth.

[0008]

According to the coating booth of the present invention, the air is supplied into the coating chamber from the outlet provided on the ceiling of the coating chamber through the air supply duct by the operation of the air supply means. In this case, since the tray means is disposed below the outlet, the flow of the supplied air is temporarily blocked by the tray means and diffused in each direction to form an air curtain uniformly in the coating chamber. Thus, the floating paint can be reliably discharged by the exhaust means.

[0009] When dew condensation occurs in the air supply duct, the dew will flow down the inside of the air supply duct from the outlet to the coating chamber, but will be disposed below the outlet. Since it is stored by the receiving pan means, it is possible to avoid falling onto the object to be coated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a painting booth according to the present invention will be described below with reference to FIG. The coating booth 1 of this embodiment includes a coating room 4 in which a hanger 3 for transporting an object 2 in a suspended state is installed, and a ceiling 4 a of the coating room 4.
An air supply duct 6 is connected to an air outlet 5 opening to the air, and an air supply chamber 7 for supplying air through the air supply duct 6 is provided. In the figure, reference numeral 8 denotes a supply / exhaust adjustment duct, 9 denotes a riser pipe for forming a water curtain along a side wall,
10 is a ceiling frame, and 11 is lighting.

The coating chamber 4 is vertically divided by a filter 12 so that air supplied from the outlet 5 is passed through the filter 12 and then flows around the article 2 to be coated. An operator (or an automatic coating machine) is arranged in the coating room 4 and is hung on a hanger 3 to spray paint on the workpiece 2 which is sequentially sent into the coating room 4 from the outside. It has become.

An exhaust chamber 13 is provided at the bottom of the coating chamber 4 with water at its bottom.
It is communicated with an exhaust duct 15 provided on the side of the coating chamber 4 via a saw-shaped partition plate 14 fixed so that a slight gap is formed between the coating chamber 4 and the water surface W. The exhaust duct 15 is provided with an exhaust fan (not shown) at its upper part, and a plurality of baffle plates 16 are provided at intermediate positions in the longitudinal direction. As a result, the air in the exhaust duct 15 is sucked upward by the operation of the exhaust fan, and the air circulating in the coating chamber 4 and reaching the exhaust chamber 13 is discharged to the outside of the coating chamber 4 while the dust is removed by the baffle plate 16. It is being discharged.

A receiving tray (receiving means) 17 is provided vertically below the outlet 5 of the air supply duct 6. The receiving tray 17 has a bottom surface 17a having a bottom area larger than the opening area of the outlet 5, and a peripheral wall 17b is formed at an edge. A drain hose 18 is connected to the bottom surface 17 a of the tray 17, and water droplets received in the tray 17 are discharged to the outside of the coating chamber 4 through the drain hose 18. As a result, dew condensation occurs on the inner surface of the air supply duct 6, and even when dew drops travel along the inner surface of the air supply duct 6 and flow down from the outlet 5, the depot 17 disposed below the air supply duct 6. It can be reliably received. In addition, the peripheral wall 1 provided at the edge
7b, the dew drops are held so as not to spill from the tray 17. The bottom surface 17a of the receiving tray 17 may be inclined so as to descend toward the drain hose 18 so that the dew drops can be easily drained.

The air supply chamber 7 is provided with, for example, a blower (not shown).
Air can be sent inside.

In the coating booth 1 constructed as described above, when a coating operation is performed, the object 2 to be hung on the hanger 3 and fed into the coating chamber 4.
Then, the application of the paint by the operator is started. At this time, the blower in the air supply chamber 7 and the exhaust fan connected to the exhaust duct 15 are operated, and the air supplied from the outlet 5 provided in the ceiling 4 a of the coating chamber 4 is supplied to the coating chamber 4.
After being circulated downward in the inside, it is discharged from the exhaust chamber 13 below the coating chamber 4 to the outside via the exhaust duct 15.

In this case, in the coating booth 1 of the present embodiment, since the receiving trays 17 are provided at intervals below the outlets 5, the air supplied from the outlets 5 is once received by the receiving trays 17. . As a result, the flow of air is diffused in all directions, and the air is allowed to pass through the filter 12 disposed thereunder over the entire surface. As a result, local contamination of the filter 12 is avoided, and dust from the filter 12 is prevented from dropping and adhering to the workpiece 2 disposed vertically below the outlet 5. Further, since the air flow circulated in the coating room 4 is uniformly formed throughout the coating room 4, the coating room 4
The effect of preventing the paint mist floating inside from flowing down reliably and preventing the paint mist from adhering to the painted surface of the workpiece 2 is improved.

Further, when the air supplied from the air supply duct 6 is warmer than the air in the coating chamber 4, for example, it is conceivable that dew condensation may occur in the vicinity of the outlet 5 where both airs come into contact. In this case, even if the dew drops flow down from the outlet 5 along the inner wall of the air supply duct 6, the tray 17 having a larger area than the outlet 5 is provided, so that the depot can be reliably received by the tray. Can be Further, the dew drops once stored in the receiving pan 17 are discharged to the outside from a drain hose 18 connected to the bottom of the receiving pan 17 as appropriate.
There is no overflow from the pan, and the fall below the pan is reliably prevented.

Therefore, according to the coating booth 1 of the present embodiment, the flow of the air supplied from the air supply duct 6 is balanced in the entire coating chamber 4 by disposing the tray 17 below the outlet 5. The coating mist can be well diffused and the adhesion of the coating mist to the workpiece 2 can be prevented. Along with this,
It is also possible to prevent dust from dropping from the locally contaminated portion of the filter 12 to the workpiece 2. Further, it is possible to prevent the dew drops from dropping from the outlet 5 onto the object 2 to be coated, thereby avoiding the occurrence of coating failure due to the adhesion of the dew drops.

In the coating booth 1 of the present invention,
Instead of the above-described embodiment, a structure of the outlet 5 as shown in FIG. 2 may be adopted. That is, by providing a tapered collision plate 19 having a diameter that expands downward around the outlet 5, and by forming the peripheral wall 20 b of the receiving tray 20 so as to face the collision plate 19, a ring-shaped collision plate 19 is formed. The channel 21 is formed. As a result, the flow of air diffused by the tray 20 is vigorously directed obliquely downward by the collision plate 19, and is diffused over a wide range. As a result, the ability to supply air into the coating chamber 4 is improved, and air is circulated in the coating chamber 4 in a well-balanced manner, so that coating mist or dust is reliably eliminated.

[0020]

As described above in detail, the coating booth according to the present invention comprises a coating chamber for spraying a coating material on an object to be coated placed in a housed state, and an air supply means for supplying air to the interior.
An air supply duct that blows the supplied air into the coating chamber from an outlet provided on the ceiling of the coating chamber, and an exhaust unit that exhausts the air circulated downward in the coating chamber from below, Since the receiving means having a larger area and being capable of storing the liquid is arranged below the outlet at intervals, the following effects are obtained. By the saucer means provided below the outlet,
The flow of the air blown out from the outlet is diffused and evenly distributed in the coating chamber, so that the paint mist floating in the coating chamber can be reliably discharged. Since the dew flowing down from the outlet is received by the pan means, it is possible to avoid the dew being attached to the object to be coated, and to improve the quality of the painted surface.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a painting booth according to the present invention.

FIG. 2 is a longitudinal sectional view showing a structure of an outlet portion in another embodiment of the coating booth of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 coating booth 2 object to be coated 4 coating room 4a ceiling 5 outlet 6 air supply duct 7 air supply room (air supply means) 13 exhaust room (exhaust means) 17 receiving tray (pan means)

Claims (1)

(57) [Scope of request for utility model registration] 1. A coating chamber for spraying a paint on an object to be coated placed in a housed state, an air supply means for supplying air into the coating chamber, and an air supply means connecting the air supply means and the upper part of the coating chamber. An air supply duct for ejecting air supplied from the inside of the coating chamber from an outlet provided on the ceiling of the coating chamber, and an exhaust means for discharging the air circulated downward in the coating chamber from below. A coating booth having a space below the outlet and having a larger area than the outlet and capable of storing liquid.