JP2017164686A - Paint booth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paint booth which prevents paint from adhering to an inner side surface.SOLUTION: A plurality of vertical ducts 33 extending vertically are arranged along a pair of inner side surfaces at intervals in a paint booth 10. Side air feed parts 34 are formed on approximately entire side surfaces of the respective vertical ducts 33 which do not overlap with the inner side surfaces of the paint booth 10, and air is jetted from the side air feed parts 34 horizontally. Thereby, paint is prevented from being adhered to the inner side surfaces of the paint booth 10. Thus, a contamination preventing sheet becomes unnecessary or a replacement frequency of the contamination preventing sheet is suppressed to reduce a running cost.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a coating booth that includes a coating processing area in which a workpiece is coated with a mist-like paint and that removes mist-like paint that has not been applied to the workpiece by sucking the air inside.

  2. Description of the Related Art Conventionally, as this type of painting booth, one having an air supply unit for supplying air to the inside is known (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 6-154677 (FIG. 1)

  However, the above-described conventional painting booth has a problem in that an uncoated mist paint adheres to the inner surface, so that it is forced to perform the work of curing with a stain-proofing sheet and frequently replacing it.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a painting booth in which paint is difficult to adhere to the inner surface.

  In order to achieve the above object, the invention of claim 1 is provided with a coating processing area in which a workpiece is coated with a mist-like paint, and the inside air is sucked downward to be uncoated on the workpiece. In a painting booth that removes a mist-like paint, a side air supply unit that blows out air in a horizontal direction or a direction inclined with respect to the horizontal direction is distributed over substantially the entire pair of inner side surfaces of the painting booth. It is a painting booth.

  According to a second aspect of the present invention, a plurality of vertical ducts projecting inwardly from the pair of inner side surfaces of the coating booth and extending in the vertical direction are provided at intervals, and the side air feeding section is provided for each vertical duct. The coating booth according to claim 1, wherein the coating booth is provided on substantially the entire side surface other than the side surface overlapping the inner side surface of the coating booth.

  Invention of Claim 3 is a coating booth of Claim 2 which has the said side air supply part and the side surface which opposes between the said adjacent said vertical ducts is mutually parallel.

  A fourth aspect of the present invention is the painting booth according to the second or third aspect, wherein a painting robot is disposed between the adjacent vertical ducts.

  According to a fifth aspect of the present invention, in the coating booth according to any one of the first to fourth aspects, the wind speed of the air supplied from the side air feeding unit is 0.5 [m / s] or less. is there.

  In the painting booth according to the first aspect, the side air supply units that eject the air in the horizontal direction or in a direction inclined with respect to the horizontal direction are distributed over substantially the entire pair of inner side surfaces of the painting booth. Therefore, it becomes difficult for paint to adhere to the inner surface of the painting booth. As a result, the anti-smudge sheet is not required, or the frequency of replacement of the anti-smudge sheet is suppressed, and the running cost can be reduced.

  As a configuration in which the side air supply units are distributed and arranged over substantially the entire inner surface of the pair of painting booths, for example, the pair of side walls of the painting booth has a double structure, and the inner wall of the double structure side walls. A configuration in which a side air feeding part is provided in the part, and a plurality of vertical ducts extending inward from a pair of inner side surfaces of the painting booth and extending in the vertical direction as in the invention of claim 2 are provided at intervals, The structure which provides a side air supply part in the side surface of a vertical duct is mentioned. Here, the opposing surfaces of the adjacent vertical ducts may be inclined so that the interval increases toward the coating treatment region side, or may be parallel to each other as in the invention of claim 3. . If the opposing surfaces of adjacent vertical ducts are parallel to each other, the air supplied from the side air supply units on the opposing surfaces collide with each other, and the wind pressure can be suppressed. Further, as in the configuration of the fourth aspect, by arranging the painting robot between the adjacent vertical ducts, it is possible to suppress the adhesion of the paint to the painting robot. As in the invention of claim 5, the wind speed of the air supplied from the side air supply unit may be 0.5 [m / s] or less. Moreover, you may vary the flow volume or flow velocity of the air from a side air supply part according to the side surface of a vertical duct, or the position of an up-down direction.

Plan sectional view of a painting booth according to an embodiment of the present invention Side view of painting booth Front section of painting booth Partial enlarged plan view of the painting booth Plan sectional view of a painting booth according to an embodiment of the present invention Front sectional view of the painting booth in the BB section of FIG. Front sectional view of the painting booth in the CC section of FIG. Front sectional view of the painting booth in the DD section of FIG. Partial cross-sectional view of a painting booth according to a modification of the present invention Partial cross-sectional view of a painting booth according to a modification of the present invention

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the coating booth 10 of the present embodiment has a rectangular planar shape, and includes a pair of short side walls 11, 11 and carry-in / out ports 11 </ b> A, 11 </ b> A. And the conveyance path 12 penetrates both the carry-in / out entrances 11A and 11A, for example, the trolley | bogie 13 (refer FIG. 3) carrying the workpiece | work W which is a vehicle body moves on the conveyance path 12 to one side, and passes the inside of the coating booth 10. It is supposed to be.

  Note that an air curtain generator (not shown) is provided at the upper opening edge of each carry-in / out port 11A, and the carry-in / out port 11A is closed by the air curtain.

  The floor surface in the painting booth 10 is formed by slatboards 20 arranged on both sides of the conveyance path 12. A plurality of (for example, three) support bases 14A, 14B, and 14C along the conveyance direction of the workpiece W are provided on both side portions (that is, both ends in the short side direction in the planar shape of the coating booth 10) on the floor surface. Are arranged at intervals. As shown in FIG. 2, the support platforms 14A, 14B, and 14C are different in height from large, medium, and small, and large, medium, and small coating robots 15 are attached to their upper surfaces. Each painting robot 15 is a so-called vertical articulated robot, and is provided with a first arm, a second arm, and a wrist connected to a turning base that swivels horizontally, and an electrostatic painting gun at the tip of the wrist. 16 (see FIG. 1) is attached. And the workpiece | work W is painted in the coating process area | region R1 (refer FIG. 1) surrounded by these coating robot 15 groups.

  As shown in FIG. 3, the lower side of the snowboard plate 20 is an underfloor chamber 21, and a pair of horizontal ducts 31 and 31 are provided on both sides of the underfloor chamber 21. These lateral ducts 31, 31 have, for example, a square cross section and extend from one end to the other end in the longitudinal direction of the coating booth 10 as shown in FIG. 2.

  An inflow port 31 </ b> A is provided at the center in the longitudinal direction on the side surface of each horizontal duct 31 opposite to the conveyance path 12. In addition, on the upper surface of the horizontal duct 31, there are provided outlets 31B at a total of four locations, that is, both ends in the longitudinal direction and two locations that divide the two ends roughly into three equal parts. Furthermore, floor surface openings 20 </ b> A are formed in the snowboard plate 20 at positions facing the outlet 31 </ b> B. And the vertical duct 33 connected to the outflow port 31B of the horizontal duct 31 is extended to the ceiling surface of the painting booth 10 through each floor surface opening 20A.

  As shown in FIG. 1, each of the vertical ducts 33 has a quadrangular cross section, and the side surfaces overlap the inner side surface of the painting booth 10. And the side air supply part 34 is formed in the substantially whole side surface which does not overlap with the inner surface of the coating booth 10 among each vertical duct 33. FIG.

  Specifically, as shown in FIG. 4, a side opening 33 </ b> A is formed on each side surface of the vertical duct 33 that does not overlap the inner side surface of the painting booth 10 by cutting out substantially the entire surface except for the outer edge portion. Yes. As shown in FIG. 3, a part of the vertical duct 33 is left as a reinforcing beam 33H at a plurality of positions in the longitudinal direction of each side opening 33A. As shown in FIG. 4, the side opening 33A is covered with a mesh 34A from the inside of the vertical duct 33, and a filter mat 34B is laid on the inside of the mesh 34A to constitute the side air supply unit 34. That is, the entire side excluding the outer edge portion of each side surface of the vertical duct 33 is a side air supply unit 34.

  A duct extending from an air conditioner (not shown) is connected to the inlet 31 </ b> A of each horizontal duct 31. The air conditioner supplies air adjusted to a predetermined humidity and temperature to each horizontal duct 31. And the air which flowed in from the horizontal duct 31 to each vertical duct 33 is sent out from the side air supply parts 34 and 34 in a horizontal direction. The amount of compressed air supplied from the air conditioner is controlled such that the average wind speed of the air supplied from each side air supply unit 34 is 0.5 [m / s] or less.

  Below the underfloor chamber 21, a suction chamber 23 partitioned from the underfloor chamber 21 by a partition plate 22 is provided. Further, a plurality of air suction ports 24 are formed in the partition plate 22 at a position closer to the conveyance path 12. Then, air is sucked from an exhaust duct (not shown) connected to the suction chamber 23 to bring the suction chamber 23 into a negative pressure state, and air is sucked into the suction chamber 23 through the plurality of air suction ports 24. The exhaust duct is connected to the combustion path, where unpainted paint is incinerated. Further, the flow rate of air sucked into the underfloor chamber 21 is substantially the same as the flow rate of air fed from the above-described air conditioner through the horizontal duct 31 and the vertical duct 33 into the painting booth 10.

  An annular ridge (not shown) protrudes upward from the opening edge of the air suction port 24, and water is applied to the upper surface of the partition plate 22, so that air is sucked into the suction chamber 23 side. The paint of the clothes may be collected by taking it into water.

  This completes the description of the configuration of the painting booth 10 of the present embodiment. Next, the effect of the painting booth 10 will be described. When the painting booth 10 is operated, compressed air is supplied from the air conditioner, and the internal pressure of each of the vertical ducts 33 arranged on both side surfaces of the painting booth 10 rises. As shown by the arrows in FIG. Air is sent out in a substantially horizontal direction from the side air feeding section 34 on each side surface 33. Then, when the workpiece W is conveyed to the painting processing region R1 surrounded by the painting robot 15 group, the workpiece W is painted by the painting robot 15 group. At that time, even if uncoated mist paint is generated, uncoated mist paint is applied by the air from the side air supply unit 34 on the side face of the vertical duct 33 facing the conveyance path 12 side. Heading to the side of the booth 10 is prevented. In addition, the pressure in the inter-duct region R2 between the vertical ducts 33 and 33 is increased by the air from the side air supply section 34 on the side surface facing the adjacent vertical ducts 33 and 33, as indicated by the arrows in FIG. In addition, air flows from the inter-duct region R2 to the coating treatment region R1, and this air also prevents uncoated mist paint from moving toward the side of the coating booth 10. In addition, since the painting robot 15 is disposed in the inter-duct area R2, adhesion of uncoated paint to the painting robot 15 is also prevented. Then, the uncoated mist paint is sucked from the inter-duct region R2 into the suction chamber 23 below.

  Further, in the painting booth 10 of the present embodiment, the air conditioner controls the average wind speed of the air supplied from each side air supply unit 34 to be a low speed of 0.5 [m / s] or less. Therefore, the air flow from the inter-duct area R2 to the coating treatment area R1 also becomes gentle. Thereby, the situation where the mist-like paint from the painting gun 16 is removed excessively is prevented.

  As described above, in the painting booth 10 according to the present embodiment, the side air supply unit 34 that blows out air in the horizontal direction is disposed so as to be distributed over substantially the entire pair of inner surfaces of the painting booth 10. The paint hardly adheres to the inner surface of the booth 10. As a result, the anti-smudge sheet is not required, or the frequency of replacement of the anti-smudge sheet is suppressed, and the running cost can be reduced.

  In addition, using the fluid analysis simulator, air was sent out at 0.05 [m / s] from the side air supply unit 34 of the coating booth 10 of the above embodiment, and the air flow was examined. As a result, as shown in FIGS. 5 to 8, it is confirmed that the air uniformly flows from the side of the coating booth 10 toward the central coating processing region R1 and flows vertically downward from the coating processing region R1. We were able to. That is, by using the painting booth 10 of this embodiment, it was confirmed that adhesion of the paint to the inner surface of the painting booth 10 and the painting robot 15 was prevented.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the above-described embodiment, the side surfaces facing each other in the adjacent vertical ducts 33 and 33 are parallel to each other. However, as shown in FIG. The opposing side surfaces of 35 and 35 may be inclined so as to be separated from each other toward the coating treatment region R1. Further, the longitudinal ducts may have a cross-sectional shape of a semicircle or a quarter circle, and the side air supply unit 34 may be provided on the arc surface thereof.

  (2) Further, as shown in FIG. 10, the pair of long side walls 30W and 30W of the coating booth 10 have a double structure, and the entire inner wall 30Y out of the double structure side walls 30W. A mesh structure may be used, or a through hole may be provided in the entire inner wall 30Y so that air is fed from the entire inner surface of the side wall 30W.

  (3) Moreover, in the said embodiment, although the conveyance path 12 has penetrated the painting booth 10 and the workpiece | work W was passing the inside of the painting booth 10, it is carried in into the painting booth 10 from a carrying-in entrance. The workpiece W may be carried out from the same carry-in entrance.

  (4) In the said embodiment, although the horizontal ducts 31 and 31 were arrange | positioned under the floor, it is good also as a structure by which the horizontal ducts 31 and 31 are arrange | positioned on the ceiling.

  (5) The thickness of the filter mat 34B of the side air supply unit 34 of the above embodiment is made different depending on the vertical position of the vertical duct 33, or is made different for each side surface, for each side air supply unit 34. Alternatively, the air flow rate or flow velocity may be different.

  (6) Although the side air supply unit 34 of the above-described embodiment sends air in the horizontal direction, the air may be jetted obliquely upward or obliquely downward.

10 painting booth 15 painting robot 16 painting gun 33, 35 vertical duct 34 side air supply section R1 painting treatment area R2 area between ducts W work

Claims (5)

In the painting booth that has a coating treatment area in which the coating of the work with the mist paint is performed inside, and removes the mist paint that has not been applied to the work by sucking the air inside the work downward,
A painting booth in which side air supply units for ejecting air in a horizontal direction or a direction inclined with respect to the horizontal direction are arranged distributed over substantially the entire pair of inner side surfaces of the painting booth. A plurality of vertical ducts projecting inward from the pair of inner side surfaces of the painting booth and extending in the vertical direction are provided at intervals,
The said side air supply part is a painting booth of Claim 1 provided in the substantially whole side surface other than the side surface which overlaps the inner surface of the said painting booth among each said vertical duct.   The coating booth according to claim 2, wherein the side surfaces that have the side air supply section and face each other between the adjacent vertical ducts are parallel to each other.   The painting booth according to claim 2 or 3, wherein a painting robot is disposed between the adjacent vertical ducts.   The coating booth according to any one of claims 1 to 4, wherein a wind speed of air supplied from the side air supply unit is 0.5 [m / s] or less.