Modification method of coating booth and coating booth

Abstract

To modify such a structure as to easily clean a coating booth.SOLUTION: A modification method of a coating booth modifies a coating booth 200 including a coating chamber 101 for coating an object, a cleaning chamber 102 for generating a negative pressure and discharging purified gas, a saw blade plate 108 which is provided on the lower part of a partition between the coating chamber 101 and the cleaning chamber 102, and a spiral plate 109 which is provided in the cleaning chamber 102 while being on the lower part of the saw blade plate 108. One or more units 211, 212, 213, 214, 215 and 216 in the shapes of rectangular parallelepiped are laid on the bottom surface of the spiral plate 109 so as not to generate a gap with the bottom surface of the spiral plate 109.SELECTED DRAWING: Figure 3A

Description

Technical Field

[0001] The present invention relates to a method for modifying a painting booth and a painting booth.

Background Art

[0002] FIG. 9 of Patent Document 1 describes a painting booth that does not include an overflow weir portion (also referred to as a floating tank; the same applies hereinafter). FIGS. 1 to 5 of Patent Document 1 describe a painting booth that includes an overflow weir portion. Non-Patent Document 1 also describes a painting booth that includes a floating tank (overflow weir portion). Non-Patent Documents 2 and 3 describe a method for cleaning a painting booth.

[0003] Based on the descriptions in these prior art documents, the structure of a conventional painting booth will be described. FIGS. 7 and 8 are diagrams showing the internal structure of a conventional painting booth 100 that does not include a floating tank. The conventional painting booth 100 includes a painting chamber 101 and a cleaning chamber 102. The painting chamber 101 and the cleaning chamber 102 are partitioned by a front plate 103. A water tank 104 is formed below the painting chamber 101. A cleaning liquid (such as water and chemicals such as a paint treatment agent) is stored in the water tank 104. An object is painted in the painting chamber 101.

[0004] An electric motor 105 is provided above the cleaning chamber 102, a fan (not shown) is attached to the electric motor 105, and the fan is housed in a fan casing 106. The gas sucked up by the fan is exhausted from a duct (not shown) through a discharge port 111.

[0005] A movable front plate 107 is attached to the lower part of the front plate 103. A saw blade plate 108 is attached to the lower part of the movable front plate 107. In FIG. 8, only a part of the saw-toothed portion of the saw blade plate 108 is shown, but almost all of the lower side portion is a saw-toothed portion.

[0006] As shown in FIG. 7, the scroll plate 109 has a curved shape on the cleaning chamber 102 side and has a structure having a plurality of scroll plate support columns 112 provided on the painting chamber 102 side. The scroll plate 109 is disposed below the saw blade plate 108 so as to be pressed by a plurality of scroll plate pressing fittings 110 attached to the movable front plate 107.

[0007] A substrate receiving support column 113 is provided in the cleaning chamber 102. At the upper end of the scroll plate 109, a substrate (also referred to as a receiving portion. The same applies hereinafter) 114 is disposed obliquely. A hole is formed in the substrate 114. The fixed water channel 115 is a water channel formed from the hole in the substrate 114 toward the water tank 104. The scroll plate 109 is hooked on the right end of the substrate 114. The substrate receiving support column 113 is a support column that prevents the saw blade plate 108 from entering the cleaning chamber 102 side under negative pressure.

[0008] A movable water channel 116 is attached to the tip of the fixed water channel 115. In FIG. 8, the movable water channel 116 is shown exposed so that the inside can be seen, but actually, the upper part of the movable water channel 116 is covered by the scroll plate 109. Therefore, the movable water channel 116 is a water channel that flows from the fixed water channel 115 through the lower part of the scroll plate 109 toward the front surface of the water tank (the front surface side of the paper in FIG. 8).

[0009] Inside the cleaning chamber 102, a plurality of eliminators (also referred to as drain plates. The same applies hereinafter) 117 are provided in a stepped and staggered manner upward.

[0010] The operating principle of the conventional painting booth 100 will be described. Due to the negative pressure by the fan at the upper part of the cleaning chamber 102, an upward airflow is generated in the cleaning chamber 102. However, since a gap is generated between the saw blade plate 108 and the water surface of the water tank 104, a flow from the painting chamber 101 toward the cleaning chamber 102 is generated. The painting mist (including dust; the same shall apply hereinafter) is sucked into the gap portion of the saw blade plate 108 according to the above flow and captured by the cleaning liquid near the saw blade plate 108. The cleaning liquid that has captured the painting mist moves toward the spiral plate 109 side through the gap formed between the water surface of the water tank 104 and the saw blade plate 108 according to the above flow.

[0011] The cleaning liquid moves in a circular motion at high speed along the spiral plate 109. The cleaning liquid hits the wall surface in the cleaning chamber 102 due to the centrifugal force generated by the circular motion and the suction action of the fan, and atomizes. The atomized cleaning liquid rises while hitting a plurality of eliminators 117 and is drained. The drained water droplets naturally fall to the substrate 114. The gas purified by the eliminator 117 is exhausted from the fan.

[0012] Since there is a flow from the painting chamber 101 toward the cleaning chamber 102, the upper layer portion of the water tank 104 in the painting chamber 101 is in the flow from the painting chamber 101 toward the cleaning chamber 102. The cleaning liquid that has naturally fallen onto the substrate 114 returns to the painting chamber 101 side through the fixed water channel 115 and the movable water channel 116. However, since the conventional water tank 104 is deep, although the cleaning liquid near the saw blade plate 108 of the water tank 104 is sucked toward the spiral plate 109 side, the inside of the water tank 104 does not entirely have convection, and there is also cleaning liquid that remains in the water tank 104.

[0013] The paint components contained in the paint mist captured by the cleaning liquid gather as paint scraps (also referred to as scum and sludge; the same shall apply hereinafter) and are in a separated state from the cleaning liquid. In the painting booth 100 without a floating tank, the separated paint scraps will accumulate in the water tank 104. In the case of a painting booth with a floating tank, the separated paint scraps float and are separated in the floating tank.

[0014] Regardless of the presence or absence of a floating tank, the paint scraps accumulate in the water tank. As described above, since there are also parts that remain in the water tank, the paint scraps precipitate or adhere in the water tank. Therefore, conventionally, as described in Non-Patent Document 2 and Non-Patent Document 3, it has been necessary to disassemble the painting booth and wash the paint chips accumulated in the painting booth.

Prior Art Documents

Patent Documents

[0015]

Patent Document 1

Non-Patent Documents

[0016]

Non-Patent Document 1

Non-Patent Document 2

Non-Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0017] In the conventional painting booth, regardless of the presence or absence of the floating tank, the spiral plate 109 has a structure supported by a plurality of spiral plate supports 112. Therefore, the lower part of the spiral plate 109 also serves as the water tank 104.

[0018] As shown in Fig. 8, in the case of a painting booth without a floating tank, since the water channel for circulation is only provided in a part of the water tank 104, below the spiral plate 109, the cleaning liquid stays without circulating. Even in a painting booth with a floating tank, for example, as can be seen from Fig. 1 of Patent Document 1, it can be understood that the cleaning liquid below the spiral plate does not circulate.

[0019] Therefore, the paint chips captured by the cleaning liquid will precipitate and adhere to the wall surface of the water tank. In order to remove the paint chips in the water tank, it was necessary to drain all the cleaning liquid, remove the spiral plate, and remove the paint chips accumulated at the back of the water tank. This cleaning work was very laborious.

[0020] Therefore, an object of the present invention is to provide a method for modifying a painting booth and a painting booth for facilitating the cleaning of the painting booth.

[0021] Furthermore, in the conventional painting booth, it was difficult to collect the paint chips in the water tank during operation.

[0022] Therefore, an object of the present invention is to provide a method for modifying a painting booth and a painting booth for facilitating the collection of the paint chips in the water tank.

Means for Solving the Problems

[0023] In order to solve the above problems, the present invention has the following features. The present invention is a method for modifying a painting booth including a painting space for painting an object, a cleaning chamber for generating negative pressure and discharging purified gas, a saw blade plate provided at the lower part of the partition between the painting space and the cleaning chamber, and a spiral plate provided below the saw blade plate and in the cleaning chamber, characterized in that one or more rectangular parallelepiped units are laid on the bottom surface of the spiral plate so that no gap is generated between the bottom surface of the spiral plate.

[0024] Preferably, the unit is also laid on at least a part of the bottom of the painting space.

[0025] Preferably, the water tank for the cleaning liquid in the area where the unit is laid on the bottom of the painting space is shallow, and the water tank for the cleaning liquid in the area where the unit is not laid on the bottom of the painting space is deep.

[0026] In the case of a structure in which the painting booth has a floating tank for storing the cleaning liquid from the cleaning chamber, preferably, when removing the substrate, the unit is made to receive the dropped cleaning liquid, or when not removing the substrate, the substrate is made to receive the cleaning liquid and is modified to circulate it to the floating tank.

[0027] Preferably, another unit having a curved portion is arranged at the corner of the floating tank.

[0028] Preferably, yet another unit having a curved portion is arranged at the corner of the water tank on the painting space side.

[0029] In the case of a structure in which the painting booth does not have a floating tank for storing the cleaning liquid from the cleaning chamber and the cleaning liquid is directly circulated from the cleaning chamber to the painting space side, preferably, a water channel for reflux is configured in the unit, and a substrate for receiving the cleaning liquid dropped in the cleaning chamber is connected to the water channel, and it is modified to circulate to the water tank on the painting space side through the water channel.

[0030] Preferably, a suction device for the cleaning liquid and / or painting waste is attached to the floating tank.

[0031] Preferably, a filtering device for filtering the painting waste is installed from the cleaning liquid and / or painting waste collected by the suction device, and further, a cleaning liquid reflux device for returning the filtered cleaning liquid to the painting booth again is installed.

[0032] Further, the present invention is a painting booth having the following structure. The present invention relates to a painting booth comprising a painting space for painting an object, a cleaning chamber that generates a negative pressure and discharges the purified gas, a saw blade plate provided at the lower part of the partition between the painting space and the cleaning chamber, and a spiral plate provided below the saw blade plate and inside the cleaning chamber. One or more rectangular parallelepiped units are laid on the bottom surface of the spiral plate so that no gap is formed between the bottom surface of the spiral plate and the units.

[0033] Preferably, the unit is a painting booth that is also laid on at least a part of the bottom of the painting space.

[0034] Preferably, the water tank for the cleaning liquid in the area where the unit is laid on the bottom of the painting space is shallow, and the water tank for the cleaning liquid in the area where the unit is not laid on the bottom of the painting space is deep.

[0035] Preferably, the painting booth further comprises a floating tank for storing the cleaning liquid from the cleaning chamber, and has a structure in which the dropped cleaning liquid is received by the unit and circulated to the floating tank.

[0036] Preferably, another unit having a curved portion is arranged at the corner of the floating tank.

[0037] Preferably, another unit having a curved portion is arranged at the corner of the water tank on the painting booth side.

[0038] Preferably, the painting booth does not have a floating tank for storing the cleaning liquid from the cleaning chamber, and has a structure in which the cleaning liquid is directly circulated from the cleaning chamber to the painting space side. A waterway for reflux is configured in the unit, and a substrate for receiving the cleaning liquid dropped in the cleaning chamber is connected to the waterway, and the cleaning liquid is circulated to the water tank on the painting space side through the waterway.

[0039] Preferably, the painting booth further comprises a suction device for the cleaning liquid and / or painting waste attached to the floating tank.

[0040] Preferably, the painting booth further comprises a filtering device that filters paint chips from the cleaning liquid and / or paint chips collected by the suction device, and a cleaning liquid reflux device that returns the filtered cleaning liquid to the painting booth again.

Advantages of the Invention

[0041] According to the present invention, since a water tank is not formed under the spiral plate, paint chips will not accumulate under the spiral plate, and a painting booth that is easy to clean will be provided.

[0042] In addition, since it is possible to prevent paint chips from staying or precipitating in the water tank, a painting booth that makes it easy to collect paint chips in the water tank will be provided.

[0043] The water tank on the painting space side is shallow on the saw blade plate side and deep elsewhere. As a result, the circulation of the cleaning liquid becomes smooth, so that the retention and precipitation of paint chips in the water tank can be reduced as much as possible. As a result, cleaning and collection of paint chips become easy.

[0044] By arranging another unit having a curved portion at the corner of the floating tank or the corner of the water tank, the circulation of the cleaning liquid becomes smooth, so that the retention and precipitation of paint chips in the water tank can be reduced as much as possible. As a result, cleaning and collection of paint chips become easy.

[0045] In the case of a painting booth having a floating tank, since the cleaning liquid falling from the unit or the substrate is received, there is no problem in cleaning in the cleaning chamber.

[0046] In the case of a painting booth without a floating tank, the water channels formed in the substrate and the unit are connected so that the cleaning liquid circulates. In this case, since the cleaning liquid falling from the substrate is received, there is no problem in cleaning in the cleaning chamber.

[0047] If a suction device for the cleaning liquid and / or paint chips is provided, the water tank can be kept clean, so that the cleaning frequency of the painting booth can be reduced.

[0048] If the painting scum is filtered and the filtered cleaning liquid is returned to the painting booth, the frequency of discarding the cleaning liquid can be reduced.

[0049] These and other objects, features, aspects, and effects of the present invention will become more apparent from the following detailed description in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0050]

Figure 1A

Figure 1B

Figure 1C

Figure 2

Figure 3A

Figure 3B

Figure 4

Figure 5

Figure 6A

Figure 6B

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0051] (First Embodiment: Modification of a Painting Booth with a Floating Tank) With reference to FIGS. 1A to 3B, a method for modifying a painting booth with a floating tank and the structure of the painting booth after modification will be described. In FIGS. 1A to 3B, for parts having the same functions as those in the conventional painting booth (without a floating tank) shown in FIGS. 7 and 8, the same reference numerals will be used, and the description in the column of the background art will be incorporated by reference, and the description will be omitted. Note that the painting chamber 101 may be exposed, and it can be regarded as a painting space for painting (the same applies to the second embodiment described later).

[0052] The structure of the painting booth 200 with a floating tank before modification is shown in FIG. 2. Note that in the painting booth (with a floating tank) 200 before modification shown in FIG. 2 as well, a fan (not shown) is attached above the cleaning chamber 102 (the same applies to the second embodiment described later). Unlike the painting booth 100 without a floating tank shown in FIGS. 7 and 8, no water channel is formed on the substrate 114 in FIG. 2.

[0053] On the side surface of the cleaning chamber 102 and below the substrate 114, a circulation hole 201 is formed. The substrate 114 is attached so as to be inclined downward toward the hole 201. The cleaning liquid that has fallen naturally in the cleaning chamber 102 flows along the inclination toward the hole 201. Since the hole 201 is connected to the floating tank 204, the cleaning liquid accumulates in the floating tank 204.

[0054] In addition, a circulation hole 203 is also formed in the side plate portion 202 at the lower part of the painting chamber 101. The hole 203 is connected to the floating tank 204.

[0055] Due to the negative pressure generated by a fan (not shown), in the water tank 104, a flow from the painting chamber 101 to the cleaning chamber 102 occurs. As a result, a flow is generated from the hole 201 on the cleaning chamber 102 side of the water tank 104 towards the floating tank 204, and a flow is generated from the floating tank 204 towards the hole 203 on the painting chamber 101 side. In this way, circulation occurs between the water tank 104 and the floating tank 204. In the painting booth 200 before the modification, paint scraps float in the floating tank 204.

[0056] However, in the painting booth 200 before the modification, as shown in FIGS. 7 and 8, the lower part of the spiral plate 109 is the water tank 104, and paint scraps also precipitate in the lower part, so cleaning was a very laborious task. Therefore, in the first embodiment, a modification method for modifying this painting booth 200 and the modified painting booth 210 (FIG. 3A) are provided.

[0057] The members used for the modification are shown in FIGS. 1A to 1C. The units 211, 212, 213, 214, 215, 216 shown in FIG. 1A are members for laying on the water tank 104 in FIG. 2.

[0058] For example, the units 211 to 215 are rectangular parallelepipeds formed of steel plates, aluminum plates, etc. The unit 216 has an inclination 216a that matches the outlet of the hole 201. Note that the units 215 and 216 may be inclined as a whole towards the hole 201. Regarding the units 211 to 216, they may be assembled at the site where the painting booth 200 is installed, or may be assembled in advance.

[0059] The unit 217 is another unit having a curved portion to improve the flow of the liquid in the floating tank 204. The unit 217 is installed at the corner of the floating tank 204 facing the hole 203 of the painting chamber 101. Unit 218 is another unit with a curved portion to improve the flow of liquid in the water tank side floating portion 220 that occurs after units 211 to 216 are installed in the water tank 204. It is installed at the corner of the water tank side floating portion 220.

[0060] After preparing the above units 211 to 218, the painting booth 200 is modified. First, regarding the painting booth 200 in FIG. 2, the substrate 114 is removed. Furthermore, a plurality of spiral plate supports 112 that support the spiral plate 109 are removed. Note that depending on the internal structure, etc. of the painting booth 200 before modification, it may not be necessary to remove the substrate 114.

[0061] Then, units 211 to 216 are spread on the bottom surface of the water tank 104 on the cleaning chamber 102 side and a part of the bottom surface of the water tank 104 on the painting chamber 101 side. On the painting chamber 101 side, care is taken not to spread the units over the entire water tank 104 on the painting chamber 101 side so that the water tank side floating portion 220 is formed. As shown in FIG. 3A, the height of units 211 to 216 reaches the height of the bottom surface of the spiral plate 109. Therefore, as shown in FIG. 3A, there will be no gap between the spiral plate 109 and units 213 and 214. Therefore, the circulating liquid will not flow under the spiral plate 109.

[0062] Units 215 and 216 will be arranged at the lower part of the cleaning chamber 102. Units 211 and 212 will be arranged at the lower part of the painting chamber 101. Parts of units 213 and 214 will be in the cleaning chamber 102 and the rest will be on the painting chamber 101 side. Note that since a little liquid leakage, etc. is outside the essence of the present invention, it is ignored and explained here. The presence or absence of waterproof processing does not limit the present invention.

[0063] Note that the number, shape, and material of the units shall be appropriately selected according to the size and structure of the painting booth. In the present invention, in order to prevent a water tank portion from being formed at the lower part of the spiral plate, the gist of the present invention is to arrange one or more units for raising the bottom of the water tank at the lower part of the spiral plate so that the cleaning liquid does not enter the units. Therefore, the quantity, shape, material, etc. of the units may be appropriately determined according to the gist of the present invention, and the illustrated example does not limit the present invention.

[0064] The painting booth modified as described above is shown in Fig. 3A. As shown in Fig. 3A, since units are arranged at the lower part of the spiral plate 109, a water tank portion is not formed. Further, a groove-shaped water tank side floating portion 220 is formed in the water tank 104 on the painting chamber 101 side. The region indicated by the hatching in Fig. 3B is the region where the cleaning liquid accumulates. Of course, the cleaning liquid also accumulates in the presence or absence 204 of the floating tank.

[0065] The operation and effect when using the modified painting booth 210 configured as described above will be described. As shown in Fig. 3B, in the water tank on the painting chamber 101 side, there are deep portions and shallow portions. The portion (water tank side floating portion 220) connected to the floating tank is deep, and the side of the saw blade plate 108 is shallow.

[0066] In the water tank side floating portion 220, some of the paint scraps leaked from the floating tank 204 are floating. Due to the flow generated by the negative pressure of the fan, the cleaning liquid in the upper layer of the water tank side floating portion 220 and the cleaning liquid in the shallow portion of the water tank 104 are sucked into the cleaning chamber 102.

[0067] The cleaning liquid that has captured the painting mist is sucked into the cleaning chamber 102 from the gap between the saw blade plate 108. The cleaning liquid sucked into the cleaning chamber 102 travels along the spiral plate 109, atomizes due to centrifugal force and suction force, and becomes water droplets by the eliminator 117 and falls onto the units 215 and 216. The fallen water droplets move through the holes 201 to the floating tank 204. In the floating tank 204, the painting debris accumulates and floats. Due to the flow generated by the negative pressure of the fan, the cleaning liquid moves from the floating tank 204 through the holes 203 to the water tank side floating portion 220.

[0068] Convection as described above will occur, but below the spiral plate 109, the cleaning liquid and painting debris will not accumulate. The water tank on the painting chamber 101 side only has a deeper connection part with the floating tank 204, while the side of the saw blade plate 108 is shallower, and the cleaning liquid on the surface layer will circulate vigorously.

[0069] Therefore, in the water tank 104, there is almost no place where the painting debris accumulates.

[0070] Furthermore, by arranging units with a curved structure such as the units 217 and 218 at the corners of the water tank 104 and the floating tank 204, the convection of the cleaning liquid at the corners is improved, and the accumulation of painting debris at the corners is eliminated.

[0071] Thus, a modified painting booth 210 that can minimize the accumulation of painting debris is provided. As a result, when cleaning the painting booth 210, the cleaning becomes easier.

[0072] Furthermore, as described above, since the painting debris hardly accumulates in the water tank 104, the precipitation of the painting debris can be minimized. Therefore, the generated painting debris can be floated in the floating tank 204. If the painting debris floating in the floating tank 204 is sucked by a separately provided suction device, the painting debris in the water tank 104 can be removed.

[0073] Furthermore, instead of only sucking up the paint sludge, it is also possible to suck up the cleaning liquid including the paint sludge from the floating tank 204, filter the paint sludge, and return the cleaned cleaning liquid to the floating tank 204 or the water tank 104 again.

[0074] Also, it is possible to suck up the cleaning liquid including the paint sludge from the floating tank 204, filter the paint sludge, and store the cleaned cleaning liquid in a tank. It is also possible to return the stored cleaning liquid to the floating tank 204 or the water tank 104 again.

[0075] In this way, in the modified painting booth 210, it is possible to further install a suction device for the cleaning liquid and / or the paint sludge, a filtering device for the paint sludge, and a storage device for the cleaning liquid. Furthermore, it is also possible to install a cleaning liquid reflux device for returning the cleaning liquid after filtering the paint sludge to the painting booth 210.

[0076] (Second Embodiment: Modification of a Painting Booth without a Floating Tank) Next, a method for modifying the conventional painting booth 300 without a floating tank shown in FIG. 5 and the modified painting booth 310 shown in FIG. 6A will be described. In FIGS. 4 to 6B, for parts having the same functions as those in the conventional painting booths (without a floating tank) shown in FIGS. 7 and 8, the same reference numerals will be used, and the descriptions in the column of the background art will be incorporated by reference, and the descriptions will be omitted.

[0077] In the painting booth 300 before modification shown in FIG. 5, a water channel 114a (shown by a broken line) for circulating the cleaning liquid to the water tank 104 is provided from the holes provided in the substrate 114. The cleaning liquid that has fallen on the substrate 114 returns to the water tank 104 via the two water channels 114a.

[0078] As shown in FIG. 5, in the conventional painting booth 300 before modification, since the area under the spiral plate 109 also serves as the water tank 104, the cleaning liquid stays, and the paint sludge is likely to precipitate, making the cleaning work of the paint sludge difficult.

[0079] Therefore, in the second embodiment, a method for modifying the conventional painting booth 300 shown in FIG. 5 and the modified painting booth 310 will be described.

[0080] FIG. 4 shows the units used for the modification. For the modification, units 311, 312, and 313 are prepared in advance or assembled on-site. Units 311, 312, and 313 are manufactured from steel plates, aluminum plates, etc. In units 311 and 312, grooves 314 and 315 for reflux to the painting chamber 101 side are formed. In unit 313, a fixed water channel 316 to be attached to the holes provided in the substrate 114 is provided. Furthermore, in unit 313, an internal water channel 317 connected to the fixed water channel 316 is formed. An internal water channel 317 is also formed in unit 312.

[0081] Note that the number, shape, and arrangement of the units are only examples. If one or more units for raising the water tank are arranged below the spiral plate, and a water channel for returning the cleaning liquid from the substrate is formed while preventing the cleaning liquid from entering the units, the number, shape, and arrangement of the units may be appropriately changed.

[0082] Regarding other points to note about the units, they are the same as in the first embodiment.

[0083] As shown in FIG. 6A, units 311, 312, and 313 are installed at the bottom of the painting chamber 101, under the spiral plate 109, and at the bottom of the cleaning chamber 102. At this time, new holes for the fixed water channel 316 are provided in the substrate 114. The holes in the already open substrate 114 are closed. Or, a new substrate 114 is manufactured in advance.

[0084] Similar to the first embodiment, the bottom of the painting chamber 101 is not covered with units so that a floating part 220 on the water tank side can be formed in the water tank 104 on the painting chamber 101 side. The part where water accumulates in the painting booth 310 is shown by the hatched part in FIG. 6B.

[0085] The cleaning liquid that has fallen onto the substrate 114 returns to the water tank side floating portion 220 of the water tank 104 through the fixed water channel 316, the internal water channel 317, and the grooves 315, 314. Note that the grooves 315, 314 may be closed from above.

[0086] With such a structure, a convection will occur among the water tank side floating portion 220, the saw blade plate 108, the spiral plate 109, the substrate 114, the internal water channel 317, and the grooves 315, 314. Since units are laid out at the lower part of the spiral plate 109, the coating waste of the cleaning liquid will not precipitate. Therefore, even for a painting booth of the type without a floating tank, it is possible to perform an easy-to-clean modification.

[0087] The coating waste floats in the water tank side floating portion 220. Similar to the first embodiment, it is also possible to further install a suction device for the cleaning liquid and / or the coating waste, a filtering device for the coating waste, and a storage device for the cleaning liquid in the water tank side floating portion 220. Furthermore, it is also possible to install a cleaning liquid reflux device that returns the cleaning liquid after filtering the coating waste to the painting booth 210.

[0088] In the second embodiment, needless to say, if the holes already opened in the substrate 114 can be diverted, there is no need to newly open holes for the fixed water channel 316 in the substrate. In short, it is sufficient that the water channels of the units 311, 312, 313 and the substrate 114 are connected.

[0089] Although the present invention has been described in detail above, the foregoing description is merely an exemplification of the present invention in every aspect and is not intended to limit its scope. Needless to say, various improvements and modifications can be made without departing from the scope of the present invention. The constituent elements of the invention disclosed in this specification shall be regarded as being independently established as individual inventions. The inventions obtained by combining each constituent element in any combination method shall also be included in the present invention. The specific expressions in this specification are merely exemplifications, and the present invention shall also include those obtained by conceptualizing the exemplified expressions.

Industrial Applicability

[0090] The present invention relates to a method for modifying a painting booth and the painting booth after modification, and is industrially applicable.

Explanation of Signs

[0091] 100 Painting booth 101 Painting chamber 102 Cleaning chamber 103 Front plate 104 Water tank 105 Electric motor 106 Fan casing 107 Movable front plate 108 Saw blade plate 109 Scroll plate 110 Scroll plate pressing fitting 111 Discharge port 112 Scroll plate support 113 Substrate receiving support 114 Substrate 114a Water channel 115 Fixed water channel 116 Movable water channel 117 Eliminator 200 Painting booth before modification 201 Hole 202 Side plate part 203 Hole 204 Floating tank 210 Painting booth after modification 211 Unit 212 Unit 213 Unit 214 Unit 215 Unit 216 Unit 216a Inclination 220 Floating part on the water tank side 300 Painting booth before modification 310 Painting booth after modification 311 Unit 312 Unit 313 Unit 314 Groove 315 groove 316 fixed water channel 317 internal water channel

Claims

1. A method for modifying a painting booth, comprising a painting space for painting an object, a cleaning chamber that generates a negative pressure and discharges purified gas, a saw blade plate provided at the lower part of the partition between the painting space and the cleaning chamber, and a spiral plate provided below the saw blade plate and inside the cleaning chamber, characterized in that one or more rectangular parallelepiped units are laid on the bottom surface of the spiral plate so that no gap is formed between the bottom surface of the spiral plate. A method for modifying a painting booth.

2. The method for modifying a painting booth according to claim 1, wherein the unit is also laid on at least a part of the bottom of the painting space.

3. The water tank for the cleaning liquid in the area where the unit is laid on the bottom of the painting space is shallow, The method for modifying a painting booth according to claim 2, wherein the water tank for the cleaning liquid in the area where the unit is not laid on the bottom of the painting space is deep.

4. When the painting booth has a floating tank for storing the cleaning liquid from the cleaning chamber, When removing the substrate, the dropped cleaning liquid is received by the unit, or when the substrate is not removed, the cleaning liquid is received by the substrate and circulated to the floating tank. The method for modifying a painting booth according to claim 1.

5. The method for modifying a painting booth according to claim 4, wherein another unit having a curved portion is arranged at the corner of the floating tank.

6. The method for modifying a painting booth according to claim 5, wherein yet another unit having a curved portion is arranged at the corner of the water tank on the painting space side.

7. When the painting booth does not have a floating tank for storing the cleaning liquid from the cleaning chamber and has a structure for circulating the cleaning liquid directly from the cleaning chamber to the painting space side, A water channel for reflux is formed in the unit, The method for modifying a painting booth according to claim 1, characterized in that a substrate for receiving the cleaning liquid dropped in the cleaning chamber is connected to the water channel and circulated to the water tank on the painting space side through the water channel.

8. The method for modifying a painting booth according to claim 1, characterized in that a suction device for the cleaning liquid and / or painting waste is attached to the floating tank.

9. A method for modifying a painting booth according to claim 8, wherein a filtering device for filtering paint chips is installed in the cleaning liquid and / or paint chips collected by the suction device, and further, a cleaning liquid reflux device for returning the filtered cleaning liquid to the painting booth again is installed.

10. A painting booth comprising a painting space for painting an object, a cleaning chamber for generating a negative pressure and discharging purified gas, a saw blade plate provided at a lower part of a partition between the painting space and the cleaning chamber, and a spiral plate provided below the saw blade plate and inside the cleaning chamber, A painting booth, characterized in that one or more rectangular parallelepiped units are laid on the bottom surface of the spiral plate so that no gap is formed between the bottom surface of the spiral plate.

11. The painting booth according to claim 10, wherein the unit is also laid on at least a part of the bottom of the painting space.

12. The water tank for the cleaning liquid in the area where the unit is laid on the bottom of the painting space is shallow, The painting booth according to claim 11, characterized in that the water tank for the cleaning liquid in the area where the unit is not laid on the bottom of the painting space is deep.

13. The painting booth according to claim 10, further comprising a floating tank for storing the cleaning liquid from the cleaning chamber, The painting booth according to claim 10, characterized in that the structure is such that the dropped cleaning liquid is received by the unit and circulated to the floating tank.

14. The painting booth according to claim 13, characterized in that another unit having a curved portion is arranged at a corner of the floating tank.

15. The painting booth according to claim 14, characterized in that another unit having a curved portion is arranged at a corner of the water tank on the painting booth side.

16. The painting booth does not have a floating tank for storing the cleaning liquid from the cleaning chamber, and has a structure in which the cleaning liquid is circulated directly from the cleaning chamber to the painting space side, A water channel for reflux is formed in the unit, The painting booth according to claim 10, characterized in that a substrate for receiving the cleaning liquid dropped in the cleaning chamber is connected to the water channel, and the cleaning liquid is circulated to the water tank on the painting space side through the water channel.

17. The painting booth according to claim 10, further comprising a suction device for the cleaning liquid and / or paint chips attached to the floating tank.

18. A filtering device for filtering paint scraps from the cleaning liquid and / or paint scraps collected by the suction device, and a cleaning liquid reflux device for returning the filtered cleaning liquid to the painting booth again, further comprising the painting booth according to claim 17.

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