JPH0737364U - painting booth - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the deterioration of the quality of the painted surface of the object to be painted in the booth. [Structure] A coating chamber 4 for spraying a coating material onto an object to be coated 2 arranged in a stored state, an air supply means 7 for supplying air into the interior thereof, and a blowout of the supplied air on a ceiling 4a of the coating chamber 4. Air supply duct 6 to be ejected from the mouth 5 into the coating chamber 4
And a discharge means 13 for discharging the air circulated in the coating chamber 4 downward from the lower part, having a wider area below the outlet 5 and storing a liquid. A possible saucer means 17 is provided, the airflow from the air supply duct 6 is diffused by the saucer means 17, and dew drops generated in the air supply duct 6 are prevented from falling on the object to be coated 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a painting booth.

[0002]

[Prior art]

 If the paint is sprayed onto the object to be coated, a part of it will float and stay in the coating room as a paint mist, which will adhere to the object to be coated and adversely affect the quality of the coated surface. Are known. In order to solve this problem, for example, a coating booth disclosed in Japanese Patent Laid-Open No. 62-277173 has been proposed.

In this coating booth, the air supplied from above the object to be coated flows downward to form an air curtain around the object to be coated, and an exhaust chamber and a coating machine provided in the lower part of the coating chamber. The paint mist generated during painting is collected by the communication part to the exhaust duct that is provided on the wall opposite to 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 communication section, so that the adherence of the object to be coated to the coating surface can be reliably prevented.

[0004]

[Problems to be solved by the device]

 However, in such a coating booth, since it is necessary to form a downward air curtain around the object to be coated, the outlet of the air supply duct must be provided above the object to be coated, which causes the following disadvantages. Was there. That is, when the temperature of the air in the coating chamber is low or the temperature of the outside air outside the air supply duct is low, if the air temperature higher than that is supplied from the air supply duct, the air supply in the vicinity of the air outlet will be considered. May form condensation on the inner surface of the air duct. As a result, the generated dew drops flow along the inner surface of the air supply duct from the outlet into the coating chamber, and adhere to the surface of the object to be coated vertically below the outlet, causing coating failure. An imbalance is possible.

Further, if the air supplied from the air supply duct is directly applied to the object to be coated, there is a possibility that dust contained in the supplied air adheres to the object to be coated. In order to avoid this, even if a filter is placed between the outlet and the object to be coated, it is conceivable that local contamination of the filter will occur. Inconvenience that the dust of the above may fall on the object to be coated can be considered.

The present invention has been made in view of the above-mentioned circumstances, and in the case of supplying air from the ceiling of the coating chamber through the air supply duct, it is possible to improve the quality of the coating surface. The purpose is to provide a booth.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a coating chamber for spraying a coating material on an object to be coated, an air supply unit for supplying air into the coating chamber, the air supply unit and the coating chamber described above. An air supply duct that connects the upper part and blows the air supplied from the air supply means into the coating chamber from the outlet provided in the ceiling of the coating chamber, and the air circulated downward in the coating chamber from the lower part. There is proposed a coating booth, which is provided with an exhausting means for discharging and which is provided with a saucer means having a larger area than the blowout opening and having a larger area than the blowout opening and capable of storing a liquid.

[0008]

[Action]

 According to the coating booth of the present invention, air is sent into the coating chamber through the air supply duct from the outlet provided in the ceiling of the coating chamber by the operation of the air supply means. In this case, since the pan means is arranged below the outlet, the flow of the supplied air is once blocked by the pan means and diffused in each direction, so that the air curtain is evenly distributed in the coating chamber. It becomes possible to reliably discharge the floating paint by the exhaust means by forming the above.

Further, when dew condensation occurs in the air supply duct, the dew condensation is transmitted along the inner surface of the air supply duct and flows down into the coating chamber from the air outlet, but it is arranged below the air outlet. Since it is stored by the receiving tray means, it is possible to avoid falling onto the object to be coated.

[0010]

【Example】

 An embodiment of the coating booth according to the present invention will be described below with reference to FIG. The coating booth 1 of the present embodiment is connected to a coating chamber 4 in which a hanger 3 for transporting an object to be coated 2 in a suspended state is arranged, and an outlet 5 opening to a ceiling 4a of the coating chamber 4. The air supply duct 6 and the air supply chamber 7 that supplies air through the air supply duct 6 are provided. In the figure, reference numeral 8 is a supply / exhaust adjusting duct, 9 is a riser pipe for forming a water curtain along the side wall, 10 is a ceiling frame, and 11 is illumination.

The coating chamber 4 is divided into upper and lower parts by a filter 12, and air supplied from the outlet 5 is passed through the filter 12 and then circulated around the object to be coated 2. An operator (or an automatic coating machine) is arranged in the coating chamber 4, and the coating material is sprayed onto the object to be coated 2 which is suspended from the hanger 3 and sequentially fed into the coating chamber 4 from the outside. It is like this.

An exhaust chamber 13 filled with water is provided at the bottom of the coating chamber 4, and a slight gap is formed between the exhaust chamber 13 and the water surface W. It is connected to an exhaust duct 15 provided at a side portion of the coating chamber 4 via a fixed saw-shaped partition plate 14. An exhaust fan (not shown) is provided on the upper portion of the exhaust duct 15, 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 that has flowed through the coating chamber 4 and reached the exhaust chamber 13 is removed by the baffle plate 16 to the outside of the coating chamber 4 while removing dust. It is supposed to be discharged.

A saucer (receiver means) 17 is arranged vertically below the outlet 5 of the air supply duct 6. The 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 the edge. A drain hose 18 is connected to a bottom surface 17a of the tray 17 so that 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 droplets travel along the inner surface of the air supply duct 6 and flow down from the outlet 5, the dew drop 17 disposed below the dew drop 5 It is sure to be accepted. Further, the peripheral wall 17b provided at the edge portion holds dew drops so as not to spill from the tray 17. Note that the bottom surface 17a of the tray 17 may be inclined so as to descend toward the drain hose 18 so that dew drops can be easily drained.

A blower (not shown) is provided in the air supply chamber 7, for example, so that air can be sent into the coating chamber 4 through the air supply duct 6.

When performing a coating operation in the coating booth 1 configured as described above, an operator works on the object to be coated 2 that is hung from the hanger 3 and sent into the coating chamber 4. The paint application work 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 air outlet 5 provided in the ceiling 4a of the coating chamber 4 moves inside the coating chamber 4. After being circulated downward, it is discharged from the exhaust chamber 13 below the coating chamber 4 through the exhaust duct 15 to the outside.

In this case, in the coating booth 1 of the present embodiment, since the pan 17 is provided below the outlet 5 with a space therebetween, the air supplied from the outlet 5 is once received by the pan 17. . As a result, the air flow is diffused in all directions, and the filter 12 disposed therebelow is evenly transmitted 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 object to be coated 2 arranged vertically below the outlet 5. Further, since the air flow that is circulated in the coating chamber 4 is uniformly formed in the entire coating chamber 4, the paint mist floating in the coating chamber 4 is surely flowed downward to coat the object 2 to be coated. The effect of preventing adhesion to the surface is improved.

Further, when the air supplied from the air supply duct 6 is warmer than the air in the coating chamber 4, it is conceivable that dew condensation may occur in the vicinity of the blowout port 5 where both air come into contact with each other. In this case, even if the dew drops flow along the inner wall of the air supply duct 6 and flow out from the outlet 5, since the tray 17 having a larger area than the outlet 5 is provided, the dew drops are formed by the tray. It can be received reliably. Further, the dew drops once stored in the pan 17 are appropriately discharged to the outside from the drainage hose 18 connected to the bottom of the pan 17, so that they do not overflow from the pan and are reliably prevented from falling below the pan. It will be ruko.

Therefore, according to the coating booth 1 of the present embodiment, since the tray 17 is arranged below the outlet 5, the flow of the air supplied from the air supply duct 6 is distributed to the entire coating chamber 4. It is possible to prevent the coating mist from adhering to the article to be coated 2 by spreading it in a well-balanced manner. Along with this, it is possible to prevent the dust from falling from the locally soiled portion of the filter 12 onto the article to be coated 2. Further, it is possible to prevent the dew drop from dropping from the outlet 5 onto the object to be coated 2 and to avoid the occurrence of coating failure due to the attachment of the dew drop.

In addition, in the coating booth 1 of the present invention, instead of the above-described embodiment, a structure of the blowout port 5 portion as shown in FIG. 2 may be adopted. That is, by providing a tapered collision plate 19 having a diameter expanding downward around the outlet 5, and the peripheral wall 20b of the tray 20 is shaped so as to face the collision plate 19, a ring-shaped collision plate 19 is formed. The flow path 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 diffused over a wide range. As a result, the air supply capacity into the coating chamber 4 is improved, the air is circulated in the coating chamber 4 in a well-balanced manner, and the coating mist or dust is reliably removed.

[0020]

[Effect of device]

 As described above in detail, the coating booth according to the present invention is a coating chamber for spraying paint on the object to be coated, which is arranged in the storage state, an air supply means for supplying air to the inside thereof, and the supplied air for coating. It is equipped with an air supply duct that blows into the coating chamber from the outlet provided on the ceiling of the chamber, and an exhaust device that discharges the air that has circulated downward in the coating chamber from the bottom, and below the outlet. Since the tray means having a wider area than that and capable of storing the liquid is arranged in the space, the following effects can be obtained. By the saucer means provided below the outlet, the air flow ejected 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 condensation that flows down from the outlet is received by the tray means, it is possible to prevent the dew condensation from adhering to the object to be coated and improve the quality of the coated surface.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a coating booth according to the present invention.

FIG. 2 is a vertical cross-sectional view showing the structure of a blowout port in another embodiment of the coating booth shown in FIG.

[Explanation of symbols]

 1 coating booth 2 coating object 4 coating room 4a ceiling 5 outlet 6 air supply duct 7 air supply chamber (air supply means) 13 exhaust chamber (exhaust means) 17 saucer (sauce means)

Claims (1)

[Scope of utility model registration request] 1. A coating chamber for spraying paint onto an object to be coated arranged in a storage state, an air supply unit for supplying air into the coating chamber, and an air supply unit for connecting the air supply unit and the upper portion of the coating chamber. An air supply duct for ejecting the air supplied from the inside of the coating chamber from an outlet provided in the ceiling of the coating chamber, and an exhaust means for exhausting the air circulated downward in the coating chamber from the lower part. At the same time, the coating booth is characterized in that a saucer means having a larger area than the outlet and capable of storing liquid is disposed below the outlet.