JPH11244750A - Spray coating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spray coating apparatus capable of spray coating the surface of a transported building board while suppressing polluting the rear side of the building board. SOLUTION: In this spray coating apparatus for coating the surface 41 of a building board 4 by spraying a coating material from a spraying apparatus 3 installed above the building board 4 transported by a conveyer 2, the conveyer 2 is constituted of a motor 24 for driving, a pair of conveyer chains 21 rotated by the motor 24 for driving, a plurality of supporting bars 22 fixed in the conveyer chain 21 and employed for mounting building boards 4. A plurality of projected parts 23 for respectively supporting the building boards 4 are formed in the side 221 of each supporting bar 22 where the building boards are mounted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray coating apparatus for spray coating a surface of a building board conveyed by a conveyor.

[0002]

2. Description of the Related Art As a method of painting the surface of a building board,
There is a coating method by spray injection. As a device used in the above-mentioned coating method, there is a spray coating device 9 as shown in FIGS. That is, the paint is sprayed from the spray gun nozzle 31 of the spray sprayer 3 provided above the building board 4 conveyed by the conveyor 90, so that the surface 41 of the building board 4 is spray-coated. Things. The above-mentioned conventional conveyor 90 includes:
Roller conveyor (shown), mesh conveyor,
Alternatively, a chain conveyor or the like is used.

[0003] In the spray coating apparatus 9, the following control is performed so as not to spray paint between the building boards 4 being transported. That is, the tip 43 of the building board 4 being conveyed is detected by a sensor in advance, and after a predetermined time has elapsed, spraying is started to apply the coating from the tip 43 of the building board 4. Further, the spray injection is stopped by detecting the rear end portion 44 of the building board 4 with a sensor.

[0004]

However, the conventional spray coating apparatus 9 has the following problems. In other words, it takes some time from the start of the injection to stabilize the spray injection state. Therefore, in order to apply the uniform coating on the surface 41 of the building board 4, it is necessary to start spraying to some extent before the transported building board 4 reaches the position where the spraying is performed. .

[0005] Even after the spraying is stopped, the paint already sprayed remains in the air.
Further, when the spray injection is stopped, even after the electromagnetic valve of the spray injector 3 is closed, the paint remaining in the narrow tube portion from the electromagnetic valve to the nozzle hole is discharged by the residual pressure. As a result, these paints adhere to the rollers 91 and the like of the conveyor 90 from between the building boards 4 being transported. Then, the contaminated paint is transferred and adhered to the back surface 42 of the building board 4 placed on the conveyor 90 thereafter. Therefore, the back surface 42 of the building board 4 is contaminated with the contaminated paint.

[0006] Further, since the spray coating device 9 is operated continuously, the contaminated paint is cured without being removed, and is successively laminated. In particular, as the individual rollers 91 rotate at the same position as in a roller conveyor, in the conveyor 90 for transporting the building board 4, the paint concentrates on the rollers 91 located below the spray injector 3. Because of the adhesion of the paint, the contamination by the paint is remarkable. As a result, the construction board 4 may not be transported accurately.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and is directed to a spray coating apparatus capable of performing spray coating on the surface of a building board while suppressing contamination of the back face of the building board being conveyed. It is something to offer.

[0008]

According to a first aspect of the present invention, a paint is sprayed toward a building board conveyed by a conveyor from a spray sprayer provided above the building board, thereby coating the building board surface. In the spray coating apparatus to be performed, the conveyor includes a driving motor, a pair of conveyor chains which are rotated by the driving motor, and a plurality of support bars fixed to the conveyor chain for mounting the building board. And a plurality of projections for supporting the building board are provided on the building board mounting side of the support bar, respectively.

In the present invention, the most remarkable point is that a plurality of projections are provided on the building bar mounting side of the support bar in the spray coating apparatus. The building board is placed and transported on the plurality of protrusions.

The conveyor chain is mounted, for example, at one end of the conveyor on a pair of sprockets fixed to both ends of a drive shaft rotated by the drive motor. In addition, the conveyor chain is arranged so that, for example, at the other end of the conveyor, the upper side of the conveyor chain is substantially horizontal and straight.
It is attached to sprockets fixed to both ends of the support shaft. As a result, the above conveyor chain
It is rotated by the driving motor.

Further, both ends of the support bar are fixed to the pair of conveyor chains by mounting brackets or the like. In addition, the tip of the protrusion is provided to be higher than the upper surface of the conveyor chain.

Next, the operation and effect of the present invention will be described.
In the spray coating apparatus of the present invention, the support bar,
The projections and the like are slightly contaminated by paint adherence in the gap between the building plates being transported. However,
The building board is placed on the protrusion of the support bar and transported. That is, the back surface of the building board is supported by a dotted portion having a very small area.

Therefore, the paint transferred to the back surface of the building board is only the paint adhered to the tip of the projection. Therefore, the contamination on the back surface of the building board is only a few point-like portions, and the contamination is extremely suppressed as compared with the conventional case. Therefore, according to the spray coating apparatus of the present invention, it is possible to perform spray coating on the surface of the building board while suppressing the contamination on the back surface of the building board to be conveyed.

Next, according to a second aspect of the present invention, the conveyor has a pair of driving chains for rotating the conveyor chain outside the pair of conveyor chains. It is preferable that a paint scattering prevention cover is provided in a gap between the outside of the chain and the inside of the drive chain.

In this case, the paint can be prevented from adhering to the drive chain by the paint scattering prevention cover. As a result, the precision of the transport of building boards is reduced due to the adhesion and deposition of the paint stained on the drive chains,
Alternatively, it is possible to prevent a problem such as occurrence of a conveyance failure.

Next, as in the third aspect of the present invention, it is preferable that the support bar is a triangular prism, and the protrusion is attached to a top of the triangular prism. In this case, most of the paint sprayed onto the support bar by the spray injector falls along the slope of the triangular prism of the support bar. Therefore, it is possible to prevent the paint from being stuck and laminated on the support bar, and there is no possibility of contamination of the building board and poor conveyance.

Next, as in the fourth aspect of the present invention, it is preferable that the projecting portion of the support bar has a columnar shape. In this case, the surface area of the projection can be minimized when maintaining the same length and strength. Therefore, the amount of paint adhered to the protrusions is small, and the area that contaminates the back surface of the building board can be further suppressed.

Next, as in the fifth aspect of the present invention, it is preferable that the projecting portion of the support bar is a mountain-shaped projection provided along the traveling direction of the conveyor. In this case, at the top of the mountain-shaped projection, the building board is supported by a thin linear portion, and the contamination on the back of the building board is
It is further suppressed. Further, since the projection has a very large cross-sectional area with respect to the mounting area to the support bar and the height, there is little possibility that the projection may be damaged or bent.

Next, as in the sixth aspect of the present invention, the conveyer is provided at a conveyer return portion opposite to the upper side for mounting and transporting the building board, for cleaning the support bar. It is preferable to have a roll. In this case, when the conveyor has finished transporting and painting the building board and returning to place the next building board, it will be transferred to the support bars, protrusions, and conveyor chains after the building board has been transported. Adhered contaminated paint can be removed. Therefore, it is possible to reliably prevent the back surface of the building board to be placed next from being contaminated by the adhered paint.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 A spray coating apparatus according to an embodiment of the present invention will be described.
This will be described with reference to FIGS. As shown in FIGS. 1 and 2, the spray coating apparatus 1 sprays paint toward a building board 4 conveyed by a conveyor 2 from a spray injector 3 provided above the building board 4. 4 is configured to be coated.

The conveyor 2 has a driving motor 24
A pair of conveyor chains 21 rotated by the driving motor 24, and a plurality of support bars 2 fixed to the conveyor chains 21 for mounting the building board 4 thereon.
It consists of two. A plurality of projections 23 for supporting the building board 4 are provided on the building board mounting side 221 of the support bar 22.

The conveyor chain 21 is shown in FIGS.
As shown in FIG. 7, at one end of the conveyor 2, a pair of sprockets 251 fixed to both ends of a driving shaft 25 rotated by the driving motor 24 are attached. At the other end of the conveyor 2, the conveyor chain 21 is attached to sprockets 261 fixed to both ends of a supporting shaft 26 so as to keep the upper side of the conveyor chain 21 substantially horizontal and straight. . As a result, the conveyor chain 21
Is rotated by the driving motor 24.

Further, as shown in FIG.
2 has both ends fixed to the pair of conveyor chains 21 by mounting brackets 229. Note that the tip 231 of the projection 23 is located on the upper surface 2 of the conveyor chain 21.
It is mounted to be higher than 13.

When the building board 4 is coated by the spray coating apparatus 1, the building board 4 is first placed on the projection 23 of the support bar 22 and transported as shown in FIG. Next, the leading end 43 of the building board 4 being conveyed
Is detected in advance by a position sensor (not shown), and after a predetermined time has elapsed, spray injection is started from the spray gun nozzle 31 of the spray injector 3. As a result, the coating is applied sequentially from the tip 41 of the building board 4. Then, the building board 4 is conveyed, so that the coating is applied to the rear end portion 44 of the building board 4. Further, when the rear end portion 44 of the building board 4 is detected by the position sensor, the spray injection is stopped.

Next, the operation and effect of this embodiment will be described. When the building board 4 is painted by the spray coating apparatus 1, the surface 41 of the building board 4 is uniformly coated. Start spraying to some extent in advance. In addition, even after the spray injection is stopped, the paint already injected remains in the air. Further, even after the spray injection is stopped, the paint is discharged due to the residual pressure. As a result, from the space between the building boards 4 being transported, these paints are applied to the support bar 22, the projections 23, and the conveyor chains 21 of the conveyor 2.
Slightly adheres to

However, in the spray coating apparatus 1, the building board 4 is placed on the projection 23 of the support bar 22 and is transported. That is, the back 4 of the building board 4
2 is supported by a point-like portion having a very small area.

Therefore, the paint to be transferred to the back surface 42 of the building board 4 is only the paint adhered to the tip 231 of the projection 23. Therefore, the back 4 of the building board 4
The contamination of No. 2 is only a few spots, and the contamination can be extremely suppressed as compared with the conventional case. Therefore, according to the spray coating apparatus according to the present embodiment, it is possible to perform spray coating on the surface of the building board while suppressing contamination of the back surface of the building board being conveyed.

Embodiment 2 As shown in FIGS. 4 to 6, this embodiment is an example in which a drive chain 29, a paint scattering prevention cover 6, and a cleaning roller 7 are provided on the conveyor 2 in Embodiment 1. is there. That is, as shown in FIGS. 4 and 5, a pair of drive chains 29 for rotating the conveyor chain 21 is provided outside the pair of conveyor chains 21 in the conveyor 2.
Further, a paint scattering prevention cover 6 is provided in the gap 5 between the outside of the conveyor chain 21 and the inside of the driving chain 29.

The pair of drive chains 29 are mounted on sprockets 252 and 262 fixed to the drive shaft 25 and the support shaft 26. The sprockets 252 and 262 are disposed outside the sprockets 251 and 261 for the conveyor chain 21.
Then, the rotation of the drive shaft 25 rotates the drive chain 29, and the conveyor chain 21 rotates through the drive shaft 25, the support shaft 26, and the sprockets 251, 261.

As shown in FIG. 6, the conveyor 2 has two return portion support shafts for supporting the conveyor chain 21 at a conveyor return portion 212 below the drive shaft 25 and the support shaft 26. 27. Further, three lower support shafts 28 for rotating and circulating the drive chain 29 are provided below. The return portion support shaft 27 and the lower support shaft 28 have a pair of sprockets 271,
281 are provided.

Further, as shown in FIG.
The cleaning roll 7 having a brush for cleaning the support bar 22 is provided on the conveyor return portion 212 opposite to the upper side 211 on which the building board 4 is placed and transported. Further, a wiping roll 71 composed of a fiber brush roll is arranged downstream of the cleaning roll 7 on the conveyor chain 21.

The above-mentioned cleaning roll 7 and wiping roll 71
Works as follows: That is, the support bar 22, the projection 23, etc., to which the stain paint has adhered,
It reaches the conveyor return section 212. At this time, the storage tank 7
The cleaning roll 7 containing the cleaning liquid 73 stored in 2 removes the contaminated paint adhered to the support bar 22, the projection 23 and the like.

Thereafter, the support bar 22 and the like are moved to the wiping roll 71, where the residual cleaning liquid is wiped off. After that, it moves to the top of the conveyor 2 to place the next building board 4. Reference numeral 8 in FIG. 6 denotes a collection tray for collecting paint that has been sprayed and has not adhered to the building board 4 or the like. Other configurations are the same as those of the first embodiment.

Next, the operation and effect of this embodiment will be described. In the spray coating apparatus 1 according to this example, the conveyor chain 21 is rotated by the driving chain 29. Further, since the drive chain 29 is isolated from the portion of the conveyor chain 21 where the spray coating is performed by the paint scattering prevention cover 6, the paint hardly adheres. Therefore, a problem such as a decrease in the transport accuracy of the building board 4 or a defective transport does not occur.

The conveyor return section 212 is provided with the cleaning roll 7. Then, the contaminated paint adhered to the support bar 22, the projection 23, and the like is removed by the cleaning roll 7. Therefore, paint adhesion to the back surface 42 of the building board 4 to be placed next can be suppressed. Therefore, according to the present embodiment, a spray coating apparatus capable of performing spray coating stably while preventing contamination of the back surface of the building board can be obtained. Others have the same operation and effects as the first embodiment.

Embodiment 3 As shown in FIGS. 7 and 8, this embodiment uses
Is a triangular prism. The protrusion 23 is
It is attached to the top 223 of the triangular prism. Others
This is the same as the first embodiment.

In this case, even if the paint sprayed by the spray sprayer 3 adheres to the support bar 22, most of the paint falls along the inclined surface 222 of the triangular prism of the support bar 22. Therefore, it is possible to prevent the paint from being stuck and laminated on the support bar 22, and there is no risk of contamination of the building board 4 and poor conveyance. Otherwise, the same effects as in the first embodiment can be obtained.

Embodiment 4 As shown in FIG. 9 and FIG.
Is a mountain-shaped projection provided along the traveling direction of the conveyor. Other configurations are the same as those of the first embodiment.

In this case, as shown in FIG. 10, the building board 4 is supported by the tops 231 of the mountain-shaped projections 23 provided along the traveling direction of the conveyor. That is, the building board 4 is supported by a thin linear portion. Therefore, even if contaminated paint adheres to the back surface 42 of the building board 4, it becomes a thin line. Therefore, contamination of the back surface 42 of the building board 4 is further suppressed.

Since the projection 23 has a very large cross-sectional area with respect to the mounting area and the height of the support bar 22, the projection 23 is less likely to be damaged or bent. Therefore, according to the present embodiment, a spray coating device with less contamination on the back surface of the building board and high strength of the projection of the support bar can be obtained. Otherwise, the same effects as in the first embodiment can be obtained.

[0041]

As described above, according to the present invention, it is possible to provide a spray coating apparatus capable of performing spray coating on the surface of a building board while suppressing contamination of the back of the building board being conveyed. .

[Brief description of the drawings]

FIG. 1 is a plan view of a spray coating apparatus according to a first embodiment.

FIG. 2 is a side view of the spray coating apparatus according to the first embodiment.

FIG. 3 is a cross-sectional view of a mounting portion of the support bar and the conveyor chain according to the first embodiment.

FIG. 4 is a plan view of a spray coating apparatus according to a second embodiment.

FIG. 5 is a sectional view taken along the line AA of FIG. 4;

FIG. 6 is a side view of a spray coating apparatus according to a second embodiment.

FIG. 7 is a plan view of a support bar according to a third embodiment.

FIG. 8 is a sectional view taken along line BB of FIG. 7;

FIG. 9 is a plan view of a support bar according to a fourth embodiment.

FIG. 10 is a side view showing a state where a building board is placed on a support bar according to the fourth embodiment.

FIG. 11 is a plan view of a spray coating apparatus according to a conventional example.

FIG. 12 is a side view of a spray coating apparatus according to a conventional example.

[Explanation of symbols]

 1. . . Spray coating equipment, 2. . . Conveyor, 21. . . Conveyor chain, 22. . . Support bar, 23. . . Projection, 25. . . Drive shaft, 26. . . Support shaft, 29. . . 2. drive chain, . . Spray sprayer, 31. . . Spray gun nozzle, 4. . . Building board, 41. . . Surface, 42. . . Back, 6. . . 6. shatterproof cover, . . Washing roll,

Claims (6)

[Claims] 1. A spray coating apparatus for coating a surface of a building board by spraying paint from a spray injector provided above the building board conveyed by the conveyor. , A driving motor, a pair of conveyor chains rotated by the driving motor, and a plurality of support bars fixed to the conveyor chain for mounting the building board,
A spray coating apparatus, wherein a plurality of projections for supporting the building board are provided on the building board mounting side of the support bar. 2. The conveyor according to claim 1, wherein the conveyor has a pair of driving chains for rotating the conveyor chain outside the pair of conveyor chains, and the driving chain is connected to the outside of the conveyor chain. A spray coating device, characterized in that a paint splash prevention cover is provided in a gap between the inside of the chain and the paint chain. 3. The spray coating apparatus according to claim 1, wherein the support bar is a triangular prism, and the projection is attached to a top of the triangular prism. 4. The method according to claim 1, wherein:
A spray coating device according to claim 1, wherein said projections on said support bar are cylindrical. 5. The spray coating apparatus according to claim 1, wherein the projection on the support bar is a mountain-shaped projection provided along a traveling direction of a conveyor. 6. The method according to claim 1, wherein:
A spray coating apparatus, wherein the conveyor has a cleaning roll for cleaning the support bar at a conveyor return portion opposite to an upper side on which the building board is placed and transported.