JP2014136191A - Rotary atomization head type painting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance productivity in painting work, by removing paint stuck to a cover with simple work.SOLUTION: A stain preventive cover 11 is provided for covering an outer surface 5A of a housing 5, and this stain preventive cover 11 is constituted to be detachably installed on the outside of the housing 5 by assembling two divided half covers 12 and 16 to be opposite to each other. Thus, when the stain preventive cover 11 is stuck with paint and stained, it can be easily removed from the housing 5 by separating an assembly part between the respective divided half covers 12 and 16. Alternatively, a clean stain preventive cover 11 can be easily installed on the outside of the housing 5 by arranging the clean stain preventive cover 11 on the outside of the housing 5 and assembling the respective divided half covers 12 and 16 to be opposite to each other in this state.

Description

  The present invention relates to a rotary atomizing head type coating apparatus that sprays paint from a rotary atomizing head rotated by a motor toward an object to be coated.

  In general, a coating apparatus is provided with a motor having a rotating shaft, a rotary atomizing head that is attached to a tip portion of the rotating shaft of the motor and sprays paint toward an object to be coated, and covers the outside of the motor. There is known a rotary atomizing head-type coating apparatus provided with a housing. Here, during the painting operation, a part of the paint sprayed from the rotary atomizing head may float around and adhere to the outer surface of the housing. For this reason, the rotary atomizing head type coating apparatus is configured to cover the outside of the housing with a cover so that the floating paint does not adhere to the outer surface of the housing (see, for example, Patent Document 1).

International Publication No. 2007/015335

  As described above, during the painting operation, some of the paint particles sprayed from the rotary atomizing head float and adhere to the outer surface of the cover. In this case, if the paint is left attached to the cover, the paint attached to the cover may peel off and adhere to the coated surface of the object to be coated. Therefore, in the painting line, the work is periodically stopped to remove the paint adhering to the outer surface of the cover. This paint removing operation involves manually wiping off the paint adhering to the outer surface of the cover using a waste cloth or the like, and thus requires a work time, resulting in a problem that productivity is lowered.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to remove paint adhering to a cover with a simple operation, so that productivity at the time of painting can be improved. An object of the present invention is to provide a rotary atomizing head type coating apparatus.

  A rotary atomizing head type coating apparatus according to the present invention includes a motor having a rotary shaft, a rotary atomizing head that is attached to a tip portion of the rotary shaft of the motor and sprays paint toward an object to be coated, and an outer side of the motor. And a housing provided to cover.

  In order to solve the above-mentioned problem, the feature of the configuration adopted by the invention of claim 1 is that the housing is provided to prevent the paint sprayed from the rotary atomizing head from adhering to the outer surface of the housing. An anti-smudge cover is provided to cover the outer surface of the housing, and the anti-smudge cover is formed by two half covers arranged outside the housing, and the half covers are attached to each other so as to face each other. It is that it was set as the structure attached to detachable to.

  According to a second aspect of the present invention, the anti-smudge cover has a configuration where the two half covers are aligned along the rotation axis of the motor.

  According to a third aspect of the present invention, the antifouling cover is provided with a protrusion that protrudes inward toward the outer surface of the housing, and the protrusion abuts on the outer surface of the housing. A spatial region is formed between the anti-stain cover and positioning with respect to the housing.

  According to a fourth aspect of the present invention, the housing includes a columnar head portion that holds the motor, and a columnar mounting portion that extends radially outward from the head portion and is attached to an arm of an operating device for painting. And each half cover of the anti-smudge cover includes a semi-cylindrical head cover portion that covers the head portion, and a semi-cylindrical attachment cover portion that extends radially outward from the head cover portion and covers the attachment portion. It is in the configuration.

  According to a fifth aspect of the present invention, the mounting portion of the housing is provided with a concave or convex engaging portion, and the mounting cover portion is provided with a positioning portion that is positioned by engaging with the engaging portion. It is in that.

  According to a sixth aspect of the present invention, a high voltage from a high voltage generator is directly applied to the paint supplied to the rotary atomizing head.

  The invention according to claim 7 is that the anti-smudge cover is formed using a thin film body made of an insulating material or a semiconductive material.

  According to an eighth aspect of the present invention, the anti-smudge cover is composed of two divided half covers that are divided in the vertical direction along the axis of the rotation shaft of the motor, and the two divided half covers are sandwiched between the housings. The divisional half covers are attached to the outside of the housing by facing each other and assembled to each other.

  According to a ninth aspect of the present invention, the antifouling cover is formed as a single object by arranging the two half covers at symmetrical positions with a position along the axis of the rotation shaft of the motor as a fold line. The anti-smudge cover is attached to the outside of the housing by folding two half covers at the position of the fold line and facing each other with the housing sandwiched therebetween.

  According to the first aspect of the present invention, since the anti-smudge cover that covers the outer surface of the housing is provided, the anti-smudge cover prevents the paint sprayed from the rotary atomizing head from adhering to the outer surface of the housing. can do. Moreover, the anti-smudge cover can be detachably attached to the outside of the housing by assembling the two half covers arranged on the outside of the housing so as to face each other.

  Therefore, if paint adheres to the outer surface of the anti-smudge cover and becomes dirty, the anti-smudge cover with paint attached can be easily removed from the outside of the housing by separating the assembly part between the half covers. Can do. Instead, a new dirt prevention cover or a dirt prevention cover from which paint has been removed is disposed outside the housing, and in this state, the half covers are assembled so as to face each other. Thereby, a clean dirt prevention cover can be attached to the outside of the housing.

  As a result, the anti-smudge cover can be removed from the outside of the housing with a simple operation or attached to the housing with a simple operation, greatly reducing the paint removal time compared to the wiping operation. can do. Thereby, since the stop time of a painting line can be shortened, productivity at the time of a painting operation can be improved.

  In addition, the anti-smudge cover can be detachably attached to the outside of the housing by assembling the two half covers facing each other, making it easy to install and remove with fewer parts and fewer steps. It can be carried out.

  According to the second aspect of the present invention, the two half covers can be assembled to each other by combining the two half covers so as to face each other. On the other hand, the two half covers can be formed symmetrically and can be easily designed.

  According to the invention of claim 3, when the antifouling cover is attached to the outside of the housing, the projection provided on each half cover comes into contact with the outer surface of the housing, so that each half cover can be positioned with respect to the housing. it can. In addition, in the structure in which the inwardly projecting protrusion is in contact with the outer surface of the housing, a space region can be formed between the outer surface of the housing and the antifouling cover. Thereby, for example, when electrostatic coating is performed in which a high voltage is applied to the paint, it is possible to prevent electric charges from leaking from the dirt prevention cover to the housing side.

  According to the invention of claim 4, the housing can be attached to the arm of the operating device for painting through the attachment portion. On the other hand, the half cover of the anti-smudge cover is composed of a semi-cylindrical head cover portion that covers the head portion of the housing and a semi-cylindrical mounting cover portion that covers the mounting portion of the housing. By sandwiching the housing and facing each other, the head portion and the mounting portion of the housing can be covered together with the antifouling cover. In addition, since the half cover made of a combination of semi-cylindrical bodies can have a simple shape, it can be easily formed using a molding method such as vacuum molding.

  According to the invention of claim 5, when the mounting cover portion is attached to the mounting portion of the housing, the positioning portion of the mounting cover portion is engaged with the engaging portion of the mounting portion, so that the mounting cover portion becomes the length of the mounting portion. It can be positioned in the vertical direction.

  According to the invention of claim 6, by applying a high voltage directly to the paint supplied to the rotary atomizing head by the high voltage generator, the paint particles are efficiently directed toward the workpiece connected to the ground. It can fly well and can improve the coating efficiency.

  According to the invention of claim 7, when the anti-smudge cover is formed as a thin film body made of an insulating material, for example, a high voltage when performing electrostatic coating is prevented from leaking through the anti-smudge cover. be able to. On the other hand, when the anti-smudge cover is formed as a thin film body made of a semiconductive material, it is possible to prevent a intensive large current from acting on the anti-smudge cover in a short time, thereby suppressing deterioration of the anti-smudge cover. Durability.

  According to the invention of claim 8, the divided half cover of the antifouling cover can be easily formed using a molding method such as vacuum molding. The two divided half covers formed in this way can be easily attached to the outside of the housing by being opposed to each other with the housing interposed therebetween. Similarly, the two split half covers can be easily removed from the outside of the housing.

  According to the ninth aspect of the present invention, since the anti-smudge cover forms the two half covers as a single object, the number of parts can be reduced. Moreover, since the two half covers that are folded at the position of the folding line do not require positioning at the time of folding, the half covers are folded at the position of the folding line so that they face each other across the housing and are assembled together. The dirt prevention cover can be easily attached to the outside of the housing. Similarly, the two half covers can be easily removed from the outside of the housing.

1 is a front view showing a rotary atomizing head type coating apparatus according to a first embodiment of the present invention attached to an arm of a painting robot. It is a perspective view which expands and shows the rotary atomization head type coating device in FIG. It is sectional drawing of the rotary atomizing head type coating device seen from the arrow III-III direction in FIG. It is sectional drawing of the principal part expansion which shows the A section in FIG. It is a perspective view which shows a rotary atomizing head type coating apparatus in the state which removed the stain | pollution | contamination prevention cover. It is the disassembled perspective view seen from the position similar to FIG. 2 in the state which decomposed | disassembled the housing and the antifouling cover. It is the front view of FIG. 6 seen from the front side in the state which decomposed | disassembled the housing and the antifouling cover. It is sectional drawing of the principal part expansion seen from the arrow VIII-VIII direction in FIG. It is a front view showing the 1st division half cover alone. It is a front view which shows a 2nd division | segmentation half cover alone. It is explanatory drawing which shows the characteristic of various resin materials. It is a perspective view which shows the stain | pollution | contamination prevention cover by 2nd Embodiment. FIG. 13 is a development view of the dirt prevention cover shown in FIG. 12. It is a perspective view which shows the rotary atomizing head type coating device provided with the stain | pollution | contamination prevention cover by 3rd Embodiment. It is sectional drawing of the principal part expansion seen from the arrow XV-XV direction in FIG. It is sectional drawing of the principal part expansion which looked at the insulating sheet by the modification of this invention from the same position as FIG.

  Hereinafter, as a rotary atomizing head type coating apparatus according to an embodiment of the present invention, an electrostatic rotary atomizing head type electrostatic coating apparatus that directly applies a high voltage to a paint will be described as an example in detail according to the accompanying drawings. Explained.

  1 to 10 show a first embodiment of a rotary atomizing head type coating apparatus according to the present invention. In FIG. 1, reference numeral 101 denotes a painting robot as an operation device for painting, which is arranged along an article conveyance line (not shown) of the painting booth. The painting robot 101 includes a base 102, a vertical arm 103 that is rotatable and swingable on the base 102, and a horizontal arm 104 that is swingably provided at the tip of the vertical arm 103. It is comprised by. The tip of the horizontal arm 104 is a wrist 104A whose direction can be freely changed. A rotary atomizing head type coating apparatus 1 described later is attached to the wrist 104A.

  Next, the rotary atomizing head type coating apparatus 1 to which the first embodiment of the present invention is applied will be described.

  Reference numeral 1 denotes a rotary atomizing head type coating apparatus (hereinafter referred to as a coating apparatus 1) provided on the wrist 104A of the horizontal arm 104 constituting the coating robot 101. The coating apparatus 1 is configured as a direct charging type electrostatic coating apparatus that directly charges a paint with a high voltage from a high voltage generator 10 described later. As shown in FIGS. 2 and 3, the coating apparatus 1 includes an air motor 2, a rotary atomizing head 3, a housing 5, a high voltage generator 10, a dirt prevention cover 11 and the like which will be described later.

  Reference numeral 2 denotes an air motor as a motor serving as a rotation source of the coating apparatus 1. The air motor 2 rotates a rotary atomizing head 3 to be described later by supplying pressurized air. As shown in FIG. 3, the air motor 2 includes a motor case 2A formed of a conductive metal material such as an aluminum alloy, and a hollow supported rotatably in the motor case 2A via a static pressure air bearing 2B. The rotating shaft 2C and an air turbine 2D fixed to the base end side of the rotating shaft 2C. The air motor 2 is disposed with the direction of the axis OO of the rotating shaft 2C as the front and rear directions. The air motor 2 rotates the rotary shaft 2C and the rotary atomizing head 3 at a high speed of 3000 to 100,000 rpm, for example, by supplying driving air to the air turbine 2D.

  Reference numeral 3 denotes a rotary atomizing head positioned on the front side of the coating apparatus 1 and provided rotatably. The rotary atomizing head 3 is attached to the tip portion of the rotary shaft 2 </ b> C of the air motor 2. The rotary atomizing head 3 is formed of, for example, a conductive metal material such as an aluminum alloy, or a surface of an insulating resin material that is subjected to conductive metal plating. The rotary atomizing head 3 is formed in a cup shape and is rotated at high speed by the air motor 2. In this state, when the paint is supplied to the rotary atomizing head 3 through the feed tube 4 described later, the rotary atomizing head 3 sprays the paint by centrifugal force.

  Reference numeral 4 denotes a feed tube provided so as to be inserted into the rotary shaft 2 </ b> C of the air motor 2. The distal end side of the feed tube 4 protrudes from the distal end of the rotating shaft 2 </ b> C and extends into the rotary atomizing head 3. The feed tube 4 serves as a paint passage, and the paint passage is connected to a paint supply source and a cleaning fluid supply source (both not shown) via a color change valve device or the like. As a result, the feed tube 4 supplies the paint toward the rotary atomizing head 3 through the paint passage during painting. On the other hand, cleaning fluid (such as thinner and air) is supplied during cleaning and color change.

  Reference numeral 5 denotes a housing provided to cover the outside of the air motor 2, and the housing 5 is made of, for example, an insulating resin material. The housing 5 includes a columnar head portion 6 that holds the air motor 2 and a mounting portion 7 that extends radially outward from the head portion 6. As shown in FIGS. The unit 7 is attached to the wrist 104 </ b> A of the horizontal arm 104 constituting the painting robot 101. Furthermore, the outer surface 5A of the housing 5 is covered with a dirt prevention cover 11 described later.

  The head portion 6 constituting the housing 5 is formed as a cylindrical body extending in the axial direction of the rotary shaft 2C, and a motor accommodating recess 6A for accommodating the motor case 2A is formed at the front position thereof. The head portion 6 is covered with head cover portions 13 and 17 of the respective divided half covers 12 and 16 that constitute a stain prevention cover 11 described later.

  The attachment portion 7 of the housing 5 extends radially outward from a position closer to the rear side of the head portion 6. Specifically, the attachment portion 7 is formed so as to be inclined from the front side toward the rear side and extend in an oblique direction with respect to the axis OO. The mounting portion 7 is formed in a stepped columnar shape by a small diameter portion 7A located on the head portion 6 side and a large diameter portion 7B located on the horizontal arm 104 side.

  On the outer peripheral side of the large-diameter portion 7B, an annular concave engaging portion 7B1 is formed. The engaging portion 7B1 is formed to extend in a groove shape in the circumferential direction. As shown in FIG. 4, the engaging portion 7B1 is fitted with positioning portions 14C and 18C provided in large cylinder portions 14B and 18B of mounting cover portions 14 and 18 described later. Further, as shown in FIG. 3, the respective attachment cover portions 14 and 18 are attached to the outside of the large diameter portion 7 </ b> B in an externally fitted state. In the mounting portion 7, for example, a paint flow path 9 and a high voltage generator 10 which will be described later are disposed.

  Reference numeral 8 denotes a shaping air ring provided on the front side of the head portion 6. The shaping air ring 8 has a large number of shaping air ejection holes 8 </ b> A (only two are shown) located around the rotary atomizing head 3. Is provided. The shaping air ring 8 ejects shaping air from the shaping air ejection hole 8A toward the outer peripheral edge of the rotary atomizing head 3 and performs pattern formation of the paint particles sprayed from the rotary atomizing head 3. .

  Reference numeral 9 denotes a paint flow path provided in the housing 5. The paint channel 9 circulates the paint toward the feed tube 4, is provided from the head part 6 of the housing 5 to the attachment part 7, and is connected to a color change valve device or the like. The paint channel 9 may be connected to an external hose (not shown) from the head portion 6 without passing through the attachment portion 7, and connected to a color change valve device or the like via this external hose.

  Reference numeral 10 denotes a high voltage generator provided in the mounting portion 7 of the housing 5, and the high voltage generator 10 is constituted by, for example, a cockcroft circuit and supplies a voltage supplied from a power supply device (not shown) from −60 to − The voltage is boosted to 120 kV. The output side of the high voltage generator 10 is electrically connected to the air motor 2, for example. Thereby, the high voltage generator 10 applies a high voltage to the rotary atomizing head 3 via the rotating shaft 2 </ b> C, and directly charges the high voltage to the paint supplied to the rotary atomizing head 3.

  Next, the configuration of the antifouling cover 11 used in the first embodiment of the present invention will be described.

  In FIG. 2, reference numeral 11 denotes a dirt prevention cover according to the first embodiment provided outside the housing 5. The dirt prevention cover 11 covers the outer surface 5A of the housing 5 so that the paint sprayed from the rotary atomizing head 3 does not adhere to the outer surface 5A of the housing 5. As shown in FIGS. 6 and 7, the antifouling cover 11 includes a first divided half cover 12 and a second divided half cover that are divided in the vertical direction along the axis OO of the rotation shaft 2 </ b> C of the air motor 2. 16. The dirt prevention cover 11 can be detachably attached to the outside of the housing 5 by assembling the two divided half covers 12 and 16 so as to face each other.

  Reference numeral 12 denotes a first divided half cover disposed on the left side of the axis OO of the rotating shaft 2C. The first divided half cover 12 covers the left half of the housing 5 (the left portion with the axis OO as a boundary), and is formed by, for example, vacuum forming using an insulating resin material to be described later. Since this vacuum forming is a processing method that uses only a female die, the manufacturing cost of the divided half cover 12 can be kept low, and if the divided half cover 12 becomes dirty, it can be discarded (disposable). Can be low price. In addition, the division | segmentation half cover 12 can be manufactured with processing methods, such as injection molding, besides vacuum forming.

  Furthermore, in order to reduce the material cost, it is desired that the divided half cover 12 be formed as thin as possible within a range in which mechanical strength can be secured. Specifically, the thickness dimension of the divided half cover 12 is set to, for example, 2 mm or less, preferably about 0.1 mm to 1.5 mm, according to the type of resin material used.

  The first divided half cover 12 includes a head cover portion 13 that covers the head portion 6 of the housing 5, and a mounting cover portion 14 that extends radially outward from the head cover portion 13 and covers the mounting portion 7 of the housing 5. ing.

  The head cover portion 13 is formed as a semi-cylindrical body having a larger diameter than the head portion 6 of the housing 5 formed in a columnar shape. The head cover portion 13 has a reduced diameter portion 13A whose front side is reduced in accordance with the shape of the shaping air ring 8, and a semicircular opening 13B through which the rotary atomizing head 3 passes is formed at the center. . On the other hand, the rear side of the head cover portion 13 is a spherical closed portion 13C.

  Further, the head cover portion 13 is provided with one projection 13D located at an intermediate portion in the front and rear directions and at a position near the upper portion (the top portion in FIG. 2) opposite to the mounting cover portion 14. . The protrusion 13 </ b> D is formed to protrude inward from the head cover portion 13 toward the outer surface 5 </ b> A of the housing 5. Here, as shown in FIG. 8, the protrusion 13 </ b> D contacts the outer surface 5 </ b> A of the housing 5. Thereby, the protrusion 13 </ b> D can position the head cover portion 13 with respect to the head portion 6 of the housing 5. In addition, in a state where the inwardly projecting protrusion 13 </ b> D is in contact with the head portion 6, a space region 20 described later can be formed between the head portion 6 and the inner surface of the head cover portion 13. In addition, although the case where only one protrusion 13D is provided on the attachment cover portion 14 is illustrated, a configuration in which a plurality of protrusions 13D are provided may be employed.

  The mounting cover portion 14 is formed as a semi-cylindrical body extending in an oblique direction inclined from the front and rear intermediate portions of the head cover portion 13 to the radially outer side, specifically, from the front side to the rear side. . In this case, the attachment cover portion 14 includes a small cylinder portion 14A located outside the small diameter portion 7A of the attachment portion 7 and a large cylinder portion 14B located outside the large diameter portion 7B. As shown in FIG. 3, the small cylinder portion 14A is formed to have a diameter that can form the space region 20 between the small diameter portion 7A.

  On the other hand, the large cylinder portion 14B is formed with a diameter dimension capable of coming into contact with the large diameter portion 7B in an externally fitted state. Thereby, the large cylinder part 14B can be attached without producing shakiness with respect to the large diameter part 7B.

  In addition, the large cylinder portion 14B is provided with a positioning portion 14C that is located closer to the small cylinder portion 14A in the length direction and protrudes toward the inner diameter side (see FIG. 4). The positioning portion 14C is fitted into an engaging portion 7B1 of a large-diameter portion 7B provided in the attaching portion 7 of the housing 5, and the attaching cover portion 14 is thus fitted in the length direction of the attaching portion 7 by this fitting. Can be positioned.

  Accordingly, the first divided half cover 12 can be attached to the housing 5 at a predetermined position by the protrusion 13D provided on the head cover portion 13 and the positioning portion 14C provided on the attachment cover portion 14. In this state, a space region 20 to be described later can be formed over substantially the entire length around the head portion 6 of the housing 5 and the entire circumference of the small diameter portion 7A of the mounting portion 7.

  Further, as shown in FIGS. 6 and 9, the first divided half cover 12 is located on the outer periphery of the second divided half cover 16 along the rotation axis 2 </ b> C of the air motor 2. 15 is provided. The outer fitting portion 15 extends from the front end position of the upper portion of the head cover portion 13 (reduced diameter portion 13A) to the rear position of the large cylinder portion 14B of the mounting cover portion 14 via the rear end position of the upper portion. 15A and a lower fitting portion 15B extending from the lower position of the reduced diameter portion 13A to the front position of the large cylinder portion 14B via the front position of the small cylinder portion 14A of the mounting cover portion 14.

  As shown in FIG. 8, the upper fitting portion 15A of the outer matching portion 15 is formed with, for example, an arcuate cross-sectional shape. Thus, when the first divided half cover 12 and the second divided half cover 16 are brought into contact with each other so as to face each other, the upper fitting portion 15A is elastically deformed and the second divided half cover 16 It fits so that it may overlap with the outer side of 19 A of upper fitting parts of the inner side alignment part 19, and the attachment state of both is hold | maintained. In addition, the divided half covers 12 and 16 can be easily separated (removed) by hooking and pulling the fingertips on the openings 13B of the head cover portion 13 and the like. Thus, it is possible to attach and remove by a simple operation without using a screw member or the like. On the other hand, the lower fitting portion 15B of the outer fitting portion 15 can be easily attached to and detached from the lower fitting portion 19B of the inner fitting portion 19 in the same manner as the upper fitting portion 15A.

  Reference numeral 16 denotes a second divided half cover disposed on the right side of the axis OO of the rotary shaft 2 </ b> C so as to sandwich the housing 5. The second divided half cover 16 covers the right half of the housing 5 (the right side portion with the axis OO as a boundary). Like the first divided half cover 12, for example, an insulating resin material to be described later is used. Is formed to a thickness of 2 mm or less, preferably about 0.1 mm to 1.5 mm.

  Here, the second divided half cover 16 has a symmetrical shape with the first divided half cover 12, and includes a head cover portion 17 having a reduced diameter portion 17A, an opening 17B, a closing portion 17C, and a protrusion 17D, and a small size. The mounting cover portion 18 includes a cylindrical portion 18A, a large cylindrical portion 18B, and a positioning portion 18C, and the inner mating portion 19 includes an upper fitting portion 19A and a lower fitting portion 19B. The head cover portion 17 and the mounting cover portion 18 of the second divided half cover 16 have the same configuration except that the head cover portion 13 and the mounting cover portion 14 of the first divided half cover 12 are symmetrical. Therefore, the description will be omitted.

  As shown in FIGS. 6 and 10, the second divided half cover 16 is provided with an inner alignment portion 19 located at the peripheral edge facing the first divided half cover 12. The inner mating portion 19 includes an upper fitting portion 19A extending from the front end position of the upper portion of the head cover portion 17 to the rear position of the large cylinder portion 18B of the mounting cover portion 18 through the upper rear end position, and the head cover portion 17. The lower fitting portion 19B extends from the front end position of the lower portion of the mounting cover portion 18 to the front side position of the large cylinder portion 18B via the front side position of the small cylinder portion 18A.

  As shown in FIG. 8, the upper fitting portion 19 </ b> A of the inner mating portion 19 has a slightly smaller arc-shaped cross-sectional shape than the upper fitting portion 15 </ b> A of the outer mating portion 15 constituting the first divided half cover 12. Is formed. As a result, the upper fitting portion 19 </ b> A allows the outer side alignment provided on the first divided half cover 12 when the second divided half cover 16 is brought into contact with the first divided half cover 12. When the upper fitting portion 15 </ b> A of the portion 15 overlaps the outside, it can be engaged with each other to hold the attached state. Moreover, it can be easily removed by hooking a fingertip to the opening 17B of the head cover portion 17 and pulling it away. On the other hand, the lower fitting portion 19B of the inner fitting portion 19 can be easily attached to and detached from the lower fitting portion 15B of the outer fitting portion 15 in the same manner as the upper fitting portion 19A.

  Next, an operation procedure for attaching the first divided half cover 12 and the second divided half cover 16 to the outside of the housing 5 will be described.

  As shown in FIG. 6 and FIG. 7, the divided half covers 12 and 16 are arranged facing each other at a position sandwiching the housing 5 from the left and right directions, and the divided half covers 12 and 16 approach each other from this state. Then, as shown in FIG. 8, both are engaged so that the outer matching portion 15 overlaps the outer side of the inner matching portion 19. Thereby, each division | segmentation half cover 12 and 16 can be attached to the outer side of the housing 5. FIG.

  As shown in FIGS. 3 and 4, when the divided half covers 12 and 16 are attached to the outside of the housing 5, the positioning portions 14 </ b> C and 18 </ b> C of the attachment cover portions 14 and 18 are connected to the large-diameter portion 7 </ b> B of the attachment portion 7. By fitting into the engaging portion 7B1, the divided half covers 12 and 16 can be fixed in a positioning state with respect to the length direction of the mounting portion 7. Further, the projections 13D and 17D provided on the head cover portions 13 and 17 are brought into contact with the outer surface 5A of the housing 5 (head portion 6), whereby a space is formed between the outer surface 5A and the inner surfaces of the head cover portions 13 and 17. Region 20 can be formed.

  Here, the materials of the first divided half cover 12 and the second divided half cover 16 constituting the antifouling cover 11 will be described. Each of the divided half covers 12 and 16 is made of polypropylene (PP) which is one of thermoplastic resin materials, and a flame retardant resin material in which an additive (a flame retardant) is added to the polypropylene (PP) to impart flame retardancy. Etc. are formed. In addition, depending on the type of paint used for painting (water-based paint, solvent-based paint, etc.), polyvinyl chloride (PVC), ABS resin, polyamide (PA), fluororesin (FR), polycarbonate (PC), An insulating resin material such as A-PET can be used.

  These insulating resin materials have characteristics as illustrated in FIG. 11, and materials suitable for various conditions can be applied to the divided half covers 12 and 16. For example, when a water-based paint is used, each of the divided half covers 12 and 16 can be formed using polyvinyl chloride having self-extinguishing properties and excellent workability.

  In addition to the resin materials described in the explanatory diagram of FIG. 11, polyphenylene sulfide (PPS), polystyrene (PS), polyethylene (PE), ABS / PC alloy, polybutylene terephthalate (PBT), modified polyphenylene ether (m- Insulating resin materials such as PPE), epoxy resins, and phenol resins can be used.

  Reference numeral 20 denotes a space region provided between the outer surface 5 </ b> A of the housing 5 and the antifouling cover 11. The space region 20 includes an annular space that covers substantially the entire length of the head portion 6 over the entire circumference, and an annular space that covers the entire circumference of the small diameter portion 7A of the attachment portion 7. The space region 20 has an interval of, for example, 3 mm or more, preferably 5 mm or more between the anti-stain cover 11 and the outer surface 5A of the housing 5 so that high voltage does not leak from the anti-stain cover 11 to the housing 5 side. Is formed.

  The coating apparatus 1 according to the first embodiment has the above-described configuration. Next, an operation when a painting operation is performed using the coating apparatus 1 will be described.

  First, the rotary atomizing head 3 is rotated at high speed by the air motor 2, and the paint is supplied to the rotating atomizing head 3 through the feed tube 4 in this state. Thereby, the coating apparatus 1 atomizes a coating material with the centrifugal force when the rotary atomizing head 3 rotates, and sprays it as a coating particle. Further, the shaping air is supplied from the shaping air ring 8, and the paint particles sprayed from the rotary atomizing head 3 by these shaping air are controlled to a predetermined spray pattern.

  Here, at the time of painting as described above, a negative high voltage is directly applied to the paint from the high voltage generator 10 via the air motor 2 and the rotary atomizing head 3. As a result, a paint charged to a high voltage is sprayed from the rotary atomizing head 3. Then, the charged paint particles (charged paint particles) fly along the electrostatic field formed between them and are applied to the object.

  Next, the dirt prevention function by the dirt prevention cover 11 and the replacement work of the dirt prevention cover 11 will be described.

  At the time of painting described above, a part of the paint deviating from the electrostatic field floats and flows around the painting apparatus 1. In this case, the floating paint does not adhere to the housing 5 even if it adheres to the dirt prevention cover 11. For this reason, the housing 5 can be kept clean. Here, when a lot of paint adheres to the dirt prevention cover 11, a part of the attached paint may peel off and adhere to the painted surface. For this reason, conventionally, the wiping operation of the paint has been manually performed using a waste cloth or the like.

  However, the dirt prevention cover 11 according to the present embodiment is formed by the two divided half covers 12 and 16, and the two divided half covers 12 and 16 are used by the elastic force of the outer matching portion 15 and the inner matching portion 19. It is set as the structure assembled | attached by the uneven | corrugated fitting. Therefore, for example, the divided half covers 12 and 16 can be easily separated by hooking the fingertips to the openings 13B and 17B of the head cover portions 13 and 17 and the ends of the mounting cover portions 14 and 18 and pulling them apart. Thereby, the dirt prevention cover 11 (split half covers 12 and 16) to which the paint has adhered can be removed from the outside of the housing 5.

  Next, after removing the antifouling cover 11 to which the paint has adhered, the other divided half covers 12 and 16 to which the prepared paint is not attached are brought close to each other so as to sandwich the housing 5 from the left and right directions, The outer mating portion 15 is engaged with the outer mating portion 19 so as to overlap the outer side of the inner mating portion 19. Thereby, the clean divided half covers 12 and 16 can be attached to the outside of the housing 5.

  Thus, according to the first embodiment, since the coating apparatus 1 is provided with the dirt prevention cover 11 that covers the outer surface 5A of the housing 5, the dirt prevention cover 11 is sprayed from the rotary atomizing head 3. It is possible to prevent the applied paint from adhering to the outer surface 5A of the housing 5. Moreover, the dirt prevention cover 11 is attached to and detached from the outside of the housing 5 by assembling the two divided half covers 12 and 16 arranged along the rotating shaft 2C of the air motor 2 so as to face each other. It is configured to be installed as possible.

  Therefore, when the paint adheres to the outer surface of the dirt prevention cover 11 and becomes dirty, the assembled part between the divided half covers 12 and 16 is separated, so that the dirt prevention cover 11 to which the paint adheres is attached to the housing 5. It can be easily removed from the outside. In place of the dirt-preventing cover 11 to which the paint has adhered, a new dirt-preventing cover 11 or a dirt-preventing cover 11 from which the paint has been removed is arranged outside the housing 5, and in this state, the divided half covers 12, 16 face each other. Assemble. Thereby, the dirt prevention cover 11 can be attached to the outside of the housing 5.

  As a result, the antifouling cover 11 can be removed from the outside of the housing 5 by a simple operation or attached to the housing 5 without using a tool or a dedicated mounting tool. Compared with the used wiping operation, the paint removal operation time can be greatly shortened. Thereby, since the stop time of a painting line can be shortened, productivity at the time of a painting operation can be improved.

  Further, since the dirt prevention cover 11 can be detachably attached to the outside of the housing 5 by assembling the two divided half covers 12 and 16 so as to face each other, the number of parts (two members) and the number of steps are reduced. The number of (one-touch) installation and removal operations can be performed easily.

  In addition, when the dirt prevention cover 11 is attached to the outside of the housing 5, the protrusions 13 </ b> D and 17 </ b> D provided on the head cover portions 13 and 17 of the divided half covers 12 and 16 are brought into contact with the outer surface 5 </ b> A of the housing 5, The head cover portion 13 can be positioned with respect to the head portion 6 of the housing 5. In addition, in a state where the inwardly projecting protrusion 13 </ b> D is in contact with the head portion 6, a space region 20 is formed between the outer surface 5 </ b> A of the housing 5 and the antifouling cover 11. Thereby, the resistance between the dirt prevention cover 11 and the housing 5 can be increased. For this reason, for example, even when the dirt prevention cover 11 is charged with the same polarity as the charged paint particles, it is possible to prevent the charged charge of the dirt prevention cover 11 from leaking to the housing 5 side.

  On the other hand, the housing 5 is constituted by a columnar head portion 6 and a columnar mounting portion 7 extending radially outward from the head portion 6, and each of the divided half covers 12 and 16 includes the head portion 6. The semi-cylindrical head cover portions 13 and 17 are covered, and the semi-cylindrical mounting cover portions 14 and 18 that extend radially outward from the head cover portions 13 and 17 and cover the attachment portion 7 are formed. Accordingly, the divided half covers 12 and 16 formed of a combination of semi-cylindrical bodies can be formed in a simple shape, and can be easily formed by using a molding method such as vacuum molding.

  The large-diameter portion 7B of the attachment portion 7 is provided with a concave annular engagement portion 7B1, and the attachment cover portions 14 and 18 of the divided half covers 12 and 16 are engaged with the engagement portion 7B1 and positioned. Positioning portions 14C and 18C are provided. Therefore, the attachment cover portions 14 and 18 can be positioned in the length direction of the attachment portion 7.

  Furthermore, since the dirt prevention cover 11 is formed as a thin film body made of an insulating resin material, the high voltage of the high voltage generator 10 can be prevented from leaking through the dirt prevention cover 11.

  Next, FIG. 12 and FIG. 13 show a second embodiment of the dirt prevention cover provided in the rotary atomizing head type coating apparatus according to the present invention. The feature of the second embodiment is that the antifouling cover is formed as a single object by arranging two half covers at symmetrical positions with the position along the axis of the rotating shaft of the motor as a fold line. The anti-smudge cover is attached to the outside of the housing by folding the half cover at the position of the fold line and facing each other with the housing sandwiched therebetween. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Reference numeral 31 denotes a dirt prevention cover according to the second embodiment. The anti-smudge cover 31 covers the outer surface 5A of the housing 5 so that the paint sprayed from the rotary atomizing head 3 does not adhere to the outer surface 5A of the housing 5. As shown in FIGS. 6 and 7, the antifouling cover 31 has two half covers 33 and 34 arranged at symmetrical positions with the position along the axis OO of the rotating shaft 2 </ b> C of the air motor 2 as a fold line 32. Is formed as a single object. The dirt prevention cover 31 can be detachably attached to the outside of the housing 5 by assembling the two half covers 33 and 34 so as to face each other.

  Here, as shown in FIG. 13, the anti-smudge cover 31 is formed of a single resin film (resin sheet). The anti-smudge cover 31 has a fold line 32 (dotted line portion) extending linearly in the front and rear directions at the center position in the left and right directions, and both left and right sides sandwiching the fold line 32 are symmetrical. The first half cover 33 and the second half cover 34 are formed. The dirt prevention cover 31 formed as a single object (one sheet) is formed with the same insulating resin material, plate thickness dimension, and molding means as the divided half covers 12 and 16 according to the first embodiment. .

  The first half cover 33 is formed as a semi-cylindrical body having a larger diameter than the head portion 6 of the housing 5, and includes a head cover portion 33A that covers the head portion 6, and a front and rear direction of the head cover portion 33A. A mounting cover portion 33B that covers the mounting portion 7 and is formed as a semi-cylindrical body that extends in the radial direction from the middle portion, specifically, an inclined direction from the front side to the rear side, and the head cover portion 33A, It is comprised by the outer side alignment part 33C provided in the periphery of the attachment cover part 33B.

  The front side of the head cover portion 33A is a reduced diameter portion 33A1 and an opening 33A2, and the rear side is a closing portion 33A3. Further, one projection 33A4 is formed in the middle portion in the front and rear directions of the head cover portion 33A so as to project inward toward the outer surface 5A of the housing 5.

  The mounting cover portion 33B includes a small cylindrical portion 33B1 positioned outside the small diameter portion 7A of the mounting portion 7 and a large cylindrical portion 33B2 positioned outside the large diameter portion 7B. The large cylindrical portion 33B2 includes a positioning portion 33B3. Is provided.

  The outer mating portion 33C includes an upper front fitting portion 33C1 provided at the upper portion (top portion) of the reduced diameter portion 33A1 of the head cover portion 33A, and a large cylindrical portion 33B2 of the mounting cover portion 33B from the periphery of the closing portion 33A3 of the head cover portion 33A. The rear fitting portion 33C2 extending to the rear position and the lower front fitting portion 33C3 extending from the lower portion of the reduced diameter portion 33A1 to the front side position of the large cylinder portion 33B2 of the mounting cover portion 33B are configured. The upper front fitting portion 33C1, the rear fitting portion 33C2, and the lower front fitting portion 33C3 have an arcuate cross-sectional shape, and are elastically deformed while the upper front fitting portion 34C1 and the rear fitting portion 34C are elastically deformed. The fitting part 34C2 and the lower front fitting part 34C3 can be detachably assembled.

  The second half cover 34 has a symmetrical shape with the first half cover 33, and includes a head cover portion 34A having a reduced diameter portion 34A1, an opening 34A2, a closing portion 34A3, and a projection 34A4, a small tube portion 34B1, and a large tube. The cover 34B includes a portion 34B2 and a positioning portion 34B3, and the inner mating portion 34C includes an upper front fitting portion 34C1, a rear fitting portion 34C2, and a lower front fitting portion 34C3. The head cover portion 34A and the mounting cover portion 34B of the second half cover 34 have the same configuration as the head cover portion 33A and the mounting cover portion 33B of the first half cover 33 except that they are symmetrical. Therefore, the description will be omitted.

  Since the inner mating portion 34C is fitted inside the outer mating portion 33C, each of the fitting portions 34C1, 34C2, 34C3 makes one turn more than each fitting portion 33C1, 33C2, 33C3 of the outer mating portion 33C. It is formed small.

  Next, an operation procedure for attaching the dirt prevention cover 31 to the outside of the housing 5 will be described.

  13 is folded along the folding line 32 to obtain the shape shown in FIG. The folded anti-smudge cover 31 is disposed at a position sandwiching the housing 5 from the left and right directions by the half covers 33 and 34, the half covers 33 and 34 are brought close to each other, and the outer alignment portion 33C is set to the inner alignment portion 34C. Both are engaged so that it may overlap with the outside. Accordingly, the anti-stain cover 31 can be attached to the outside of the housing 5 by assembling the half covers 33 and 34. On the other hand, the antifouling cover 31 can be easily removed from the housing 5 by hooking and pulling the fingertips on the ends of the attachment cover portions 33B and 34B.

  Thus, in the second embodiment configured as described above, it is possible to obtain substantially the same operational effects as those of the first embodiment described above. In particular, in the second embodiment, the dirt prevention cover 31 is bent along the fold line 32 and the half covers 33 and 34 face each other and are assembled to each other so that the dirt prevention cover 31 is placed outside the housing 5. It can be easily installed and removed in a short time. Moreover, since the dirt prevention cover 31 according to the second embodiment is formed as a single object, the number of parts can be minimized. Furthermore, the outer alignment portion 33C of the first half cover 33 and the inner alignment portion 34C of the second half cover 34 can be automatically aligned, and the mounting operation can be performed more easily.

  Next, FIGS. 14 and 15 show a third embodiment of the antifouling cover provided in the rotary atomizing head type coating apparatus according to the present invention. The feature of the third embodiment is that the anti-smudge cover is formed using a thin film body made of a semiconductive resin material. Note that in the third embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  Reference numeral 41 denotes a dirt prevention cover according to the third embodiment. The dirt prevention cover 41 includes a first divided half cover 42 and a second divided half cover 46, which will be described later, in the same manner as the dirt prevention cover 11 according to the first embodiment.

  Reference numeral 42 denotes a first divided half cover according to the third embodiment. The divided half cover 42 is substantially the same as the first divided half cover 12 according to the first embodiment, and includes a head cover portion 43 having a reduced diameter portion 43A, an opening 43B, a closing portion 43C, and a projection 43D, and a small cylinder. The mounting cover portion 44 includes a portion 44A, a large tube portion 44B, and a positioning portion 44C, and the outer mating portion 45 includes an upper fitting portion 45A and a lower fitting portion 45B. However, the first divided half cover 42 according to the third embodiment is formed using a semiconductive resin material obtained by blending a conductive material with an insulating resin material. It differs from the 1st division | segmentation half cover 12 by the form. In this case, as a method of imparting semiconductivity to the divided half cover 42, a method of forming a semiconductive material by overlapping an insulating sheet and a conductive sheet may be used.

  Reference numeral 46 denotes a second divided half cover according to the third embodiment. The divided half cover 46 has a symmetrical shape with the first divided half cover 42 in substantially the same manner as the second divided half cover 16 according to the first embodiment. That is, the second divided half cover 46 formed using a semiconductive resin material includes a head cover portion 47 having a reduced diameter portion 47A, an opening 47B, a closing portion 47C, and a protrusion 47D, and a small tube portion (not shown). 1), an attachment cover portion 48 having a large cylinder portion 48B and a positioning portion (not shown), and an inner mating portion 49 having an upper fitting portion 49A and a lower fitting portion 49B.

  Reference numeral 50 denotes an insulating sheet provided at a lower position of the large cylinder portions 44B and 48B constituting the attachment cover portions 44 and 48 of the divided half covers 42 and 46, respectively. In addition, since only the insulating sheet 50 provided in the first divided half cover 42 is illustrated, the insulating sheet 50 provided in the mounting cover portion 44 of the first divided half cover 42 will be described below. Description of the insulating sheet 50 on the second divided half cover 46 side will be omitted.

  As shown in FIG. 15, the insulating sheet 50 is formed as a strip-shaped insulating resin sheet facing in the radial direction so as to sandwich the lower position of the large tube portion 44 </ b> B from the inside and the outside. The insulating sheet 50 is formed to extend by a length dimension L from the lower end portion 44B1 of the large cylinder portion 44B. That is, the insulating sheet 50 secures a separation dimension of the length dimension L between the wrist 104A of the horizontal arm 104 of the painting robot 101 on the ground side and the lower end portion 44B1 of the large cylinder portion 44B. Here, by separating the wrist 104A of the horizontal arm 104 and the lower end portion 44B1 of the large cylindrical portion 44B by the length L, the charges charged in the first divided half cover 42 made of a semiconductive resin material are transferred to the horizontal arm. Leakage to the 104 side can be prevented. In this case, the length dimension L is preferably set to 10 mm or more, for example.

  Thus, also in the third embodiment configured as described above, it is possible to obtain substantially the same operational effects as those of the first embodiment described above. In particular, in the third embodiment, since the dirt prevention cover 41 is formed using a semiconductive resin material, charges can be averaged over the whole dirt prevention cover 41, and the dirt prevention cover 41 can be averaged. It is possible to make the paint hardly adhere to 41. On the other hand, even when a discharge occurs between the rotary atomizing head 3 charged to a high voltage and the dirt prevention cover 41, the current flowing through the dirt prevention cover 41 can be reduced by this discharge. Thereby, since it is possible to suppress a large local current from flowing through the dirt prevention cover 41, the deterioration of the dirt prevention cover 41 can be prevented and durability can be enhanced.

  Further, an insulating sheet 50 is provided on the large cylindrical portions 44B and 48B of the mounting cover portions 44 and 48, and the insulating sheet 50 allows the space between the lower end portion 44B1 of the large cylindrical portions 44B and 48B and the wrist 104A of the horizontal arm 104 on the ground side. The separation dimension of the length dimension L is secured. Therefore, it is possible to prevent the electric charges charged in the divided half covers 42 and 46 made of the semiconductive resin material from leaking to the horizontal arm 104 side.

  In the third embodiment, the case where the insulating sheet 50 is arranged facing the radial direction so as to sandwich the lower position of the large cylinder portion 44B from the inside and the outside is illustrated. However, the present invention is not limited to this. For example, the present invention may be configured as a modification shown in FIG. That is, the lower part of the inner insulating sheet 50 ′ extending downward from the lower position of the large cylinder portion 44 </ b> B and the lower part of the outer insulating sheet 50 ′ may be integrally fixed by means such as welding.

  In the first embodiment, the first divided half cover 12 and the second divided half cover 16 are elastically engaged with the outer alignment portion 15 and the inner alignment portion 19 so that the outer side of the housing 5 is outside. It is configured to be detachably attached to. However, the present invention is not limited to this. For example, when the first divided half cover 12 and the second divided half cover 16 are used as disposable covers, the two are assembled using means such as welding and adhesion. It is good. This configuration can also be applied to the second and third embodiments.

  In the first embodiment, an annular concave engaging portion 7B1 is provided over substantially the entire circumference of the large-diameter portion 7B of the mounting portion 7, and the mounting cover portions 14 and 18 have an inner diameter toward the large-diameter portion 7B. The case where the positioning portions 14C and 18C protruding to the side are provided and the positioning portions 14C and 18C are engaged with the engaging portion 7B1 is illustrated. However, the present invention is not limited to this. For example, an annular convex engagement portion is provided on the large diameter portion 7B of the attachment portion 7, and the large diameter portion 7B is recessed in the attachment cover portions 14 and 18. It is good also as a structure which provides this positioning part and engages this concave positioning part with a convex engaging part.

  Further, the engaging portion 7B1 is not limited to the configuration provided over the entire circumference of the large diameter portion 7B, and may be configured to be partially provided in the circumferential direction of the large diameter portion 7B. Furthermore, it is good also as a structure which provides the engaging part and positioning part which carry out uneven | corrugated fitting in the several places of the circumferential direction. These configurations can also be applied to the second and third embodiments.

  In 1st Embodiment, it is good also as a structure which provides the high voltage discharge electrode disclosed by FIG. 5 etc. of patent document 1 in the front side of the head part 6 of the housing 5, for example. In this case, since the dirt prevention cover 11 can be positively charged with the same polarity as the charged paint particles, a repulsive force is applied between the dirt prevention cover 11 and the charged paint particles to thereby remove the dirt prevention cover 11. It is possible to prevent the paint from adhering to the surface. This configuration can also be applied to the second and third embodiments.

  In the first embodiment, the paint is supplied to the feed tube 4 from the paint flow path 9 connected to the color change valve device, and this paint is sprayed from the rotary atomizing head 3. However, the present invention is not limited to this, and a paint cartridge filled with paint is attached to the rear side of the head portion 6 of the housing 5 in a replaceable manner, and the paint is directed from the paint cartridge toward the rotary atomizing head 3. It is good also as a structure which supplies. This configuration can also be applied to the second and third embodiments.

  In the first embodiment, the case where the high voltage generator 10 is provided in the housing 5 and a high voltage is directly applied to the paint via the air motor 2 and the rotary atomizing head 3 has been described as an example. However, the present invention is not limited to this, and may be applied to a non-electrostatic rotary atomizing head type coating apparatus that does not apply a high voltage to the paint. This configuration can also be applied to the second and third embodiments.

  In each embodiment, an air motor has been described as an example of a motor. However, for example, an electric motor may be used.

  Furthermore, in each embodiment, the case where the rotary atomizing head type coating apparatus 1 is attached to the horizontal arm 104 of the painting robot 101 as an operation apparatus for painting has been described as an example. However, the present invention is not limited to this, and a configuration may be adopted in which a rotary atomizing head type coating device is attached to another operating device for painting, for example, an arm of a reciprocator.

1 Rotating atomizing head type coating device 2 Air motor (motor)
2C Rotating shaft 3 Rotating atomizing head 4 Feed tube 5 Housing 5A Outer surface 6 Head part 7 Mounting part 7B Large diameter part 7B1 Engaging part 10 High voltage generator 11, 31, 41 Antifouling cover 12, 42 First division Half cover 13, 17, 33A, 34A, 43, 47 Head cover part 13D, 17D, 33A4, 34A4, 43D, 47D Protrusion 14, 18, 33B, 34B, 44, 48 Mounting cover part 14C, 18C, 33B3, 34B3, 44C Positioning portion 15, 33C, 45 Outer alignment portion 16, 46 Second divided half cover 19, 34C, 49 Inner alignment portion 20 Spatial region 32 Folding line 33 First half cover 34 Second half cover 101 Coating robot (Operating device for painting)
104 Horizontal arm (arm)
104A Wrist OO Axis of rotation axis

Claims (9)

A motor having a rotating shaft, a rotary atomizing head that is attached to a tip portion of the rotating shaft of the motor and sprays paint toward an object to be coated, and a housing that covers the outside of the motor. In rotary atomizing head type coating equipment,
In order to prevent the paint sprayed from the rotary atomizing head from adhering to the outer surface of the housing, a dirt prevention cover for covering the outer surface of the housing is provided,
The anti-smudge cover is formed by two half covers arranged outside the housing,
A rotary atomizing head type coating apparatus characterized in that each half cover is attached to the outside of the housing in a detachable manner by being mounted facing each other.   2. The rotary atomizing head type coating apparatus according to claim 1, wherein the antifouling cover has a configuration in which the two half covers are aligned along a rotation axis of the motor. The dirt prevention cover is provided with a protrusion protruding inward toward the outer surface of the housing,
3. The structure according to claim 1, wherein the protrusion is configured to abut on an outer surface of the housing to form a space region between the outer surface and the antifouling cover and to be positioned with respect to the housing. Rotary atomizing head type coating equipment. The housing includes a columnar head portion that holds the motor, and a columnar mounting portion that extends radially outward from the head portion and is attached to an arm of an operating device for painting.
Each half cover of the anti-smudge cover includes a semi-cylindrical head cover portion that covers the head portion, and a semi-cylindrical mounting cover portion that extends radially outward from the head cover portion and covers the mounting portion. The rotary atomizing head type coating apparatus according to claim 1, 2, or 3. The mounting portion of the housing is provided with a concave or convex engaging portion,
The rotary atomizing head type coating apparatus according to claim 1, 2, 3, or 4, wherein the mounting cover portion is provided with a positioning portion that is positioned by being engaged with the engaging portion.   The rotary atomizing head type coating apparatus according to claim 1, 2, 3, 4 or 5, wherein a high voltage from a high voltage generator is directly applied to the paint supplied to the rotary atomizing head. .   7. The rotary atomizing head type coating apparatus according to claim 1, wherein the antifouling cover is formed using a thin film body made of an insulating material or a semiconductive material. The dirt prevention cover is constituted by two divided half covers divided in the vertical direction along the axis of the rotation shaft of the motor,
8. The two divided half covers are mounted on the outside of the housing by assembling each other with the two divided half covers facing each other across the housing. Rotating atomizing head type coating device described in 1. The anti-smudge cover is formed as a single object by arranging the two half covers in symmetrical positions with the position along the axis of the rotation axis of the motor as a fold line.
2. The antifouling cover is attached to the outside of the housing by folding the two half covers at the position of the folding line and facing each other with the housing sandwiched therebetween. The rotary atomizing head type coating apparatus according to 4, 5, 6 or 7.

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