Powder coating system

Abstract

To save space and energy for powder coating.SOLUTION: The powder coating system includes a coating gun configured to apply a powder coating material, a coating material tank configured to store the powder coating material to be supplied to the coating gun, and a coupling portion configured to integrally support the coating gun and the coating material tank, wherein the coating material tank includes a support portion attached to the coupling portion and a tank main body formed in a container shape with one surface opened and configured to be attachable to and detachable from the support portion.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] FIELD OF THE INVENTION An embodiment of the present invention relates to a powder coating system. [Background technology]

[0002] Conventionally, there are known coating chambers in which powder paint is sprayed onto objects to be coated. Patent Document 1 discloses a technology that creates a cycle in which powder that falls onto the floor of the coating chamber is sent to a cyclone via a suction means from an inlet formed on the floor of the coating chamber, and the required amount is supplied to a coating gun by a powder supply device. The technology also aims to prevent the sprayed powder paint from adhering to the walls of the coating chamber, and to make it easy to clean even if it does adhere. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-313455 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the ancillary equipment for recovering and reusing the powder, including suction means and cyclones, increases in size depending on the size of the object to be coated, posing challenges such as securing installation space and increasing energy consumption.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a powder coating system that can achieve space-saving and energy-saving in powder coating. [Means for solving the problem]

[0006] The powder coating system of one embodiment comprises a paint gun for applying powder paint, a paint tank for storing powder paint to be supplied to the paint gun, and a connecting part for integrally supporting the paint gun and the paint tank, and the paint tank has a support part attached to the connecting part and a tank body formed in the shape of a container with one side open and configured to be attachable and detachable to the support part. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a side view schematically illustrating a general configuration of a powder coating system according to an embodiment. [Figure 2] FIG. 1 is a plan view schematically illustrating a general configuration of a powder coating system according to an embodiment. [Figure 3] 3 is a cross-sectional view of the powder coating system according to one embodiment, showing the internal configuration of the paint tank, including the connection point with the injector, taken along line X3-X3 in FIG. [Figure 4] 4 is a cross-sectional view showing the internal configuration of the paint tank of the powder coating system according to one embodiment, taken along line X4-X4 in FIG. [Figure 5] FIG. 1 is a perspective view showing a schematic configuration of an agitator in a powder coating system according to an embodiment. [Figure 6] FIG. 1 is a plan view showing a schematic configuration of an agitator in a powder coating system according to an embodiment; [Figure 7] FIG. 1 is a cross-sectional view showing a schematic configuration of the bottom surface and surrounding area of ​​a support body in a powder coating system according to an embodiment. [Figure 8] 1 is a cross-sectional view showing a schematic configuration of the top surface and surrounding area of ​​a tank body in a powder coating system according to an embodiment; [Figure 9] FIG. 1 is a cross-sectional view showing an example of a state in which a tank body is attached to a support part in a powder coating system according to an embodiment. [Figure 10] 1 is a cross-sectional view of a powder coating system according to an embodiment, taken along line X10-X10 in FIG. 2, showing compressed air being supplied from a plurality of compressed air supply paths into the internal space of the support part. [Figure 11]FIG. 1 is a cross-sectional view showing an example of a powder coating system according to an embodiment in which a tank body is removed from a support portion. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, for the sake of convenience, the dimensions of each component may be enlarged as necessary, and the dimensional ratios between the components may not be the same as in reality.

[0009] The powder coating system 1 shown in Figure 1 is a system for applying powder paint to a workpiece. In the following description, the powder coating system 1 may be simply referred to as system 1. The system 1 includes a robot arm 2, a connecting portion 3, a paint gun 4, a paint tank 5, and an injector 6. The robot arm 2 is fixed to the floor of a painting space where the workpiece is to be painted. The robot arm 2 is formed, for example, by a vertical articulated robot having six axes, and moves the paint gun 4, paint tank 5, and other components to predetermined positions. A tip 2a of the robot arm 2 is connected to the connecting portion 3. The connecting portion 3 integrally supports the paint gun 4 and paint tank 5. The connecting portion 3 is formed, for example, by bending a plate-shaped member.

[0010] As shown in Figures 1 and 2, the connecting part 3 has a connecting part main body 3a and a pair of side walls 3b. The connecting part main body 3a is formed, for example, in a generally L-shape overall. A paint gun 4 is attached to one surface of the connecting part main body 3a. A paint tank 5 is attached to the other surface of the connecting part main body 3a. In this case, the paint gun 4 and the paint tank 5 are supported by the connecting part 3 in different positions. The paint gun 4 and the paint tank 5 may be arranged on the same axis, for example, and supported by the connecting part 3 in the same position.

[0011] The connecting portion main body 3a has a mounting surface portion 3a1 and a cutout portion 3a2. The mounting surface portion 3a1 is formed, for example, in a substantially rectangular shape, and a plurality of mounting surface portions 3a1 are provided at intervals from each other. The mounting surface portion 3a1 is a surface for mounting the paint tank 5 to the connecting portion 3. The cutout portion 3a2 is formed so as to expose the top surface of the paint tank 5 attached to the connecting portion 3 except for the portion that overlaps with the mounting surface portion 3a1. The pair of side walls 3b are formed in a substantially rectangular shape and are provided at the end of the connecting portion main body 3a so as to face each other. The tip portion 2a of the robot arm 2 is connected to one of the side walls 3b.

[0012] The coating gun 4 is an automatic gun that sprays, for example, powder paint and automatically applies the powder paint to the workpiece by electrostatic attraction. The coating gun 4 is equipped with a high-voltage generator (not shown) inside for applying a high voltage to the powder paint.

[0013] The paint tank 5 contains powder paint to be supplied to the paint gun 4. As shown in FIG. 1 and other figures, the paint tank 5 has a support portion 10 and a tank body 20. The support portion 10 and the tank body 20 are configured to be detachable from each other. The support portion 10 forms the base end of the paint tank 5, and the tank body 20 forms the tip end of the paint tank 5. As shown in FIG. 2, the top surface of the support portion 10 is attached to the mounting surface portion 3a1 of the connecting portion body 3a by a plurality of fastening members 7, such as screws. In other words, the support portion 10 is attached to the connecting portion 3. Note that in FIG. 2, to make the drawing easier to understand, only some of the fastening members 7 are labeled, and the labels for the other fastening members 7 are omitted.

[0014] As shown in FIG. 3 , the support part 10 has a support part main body 11 and a cover part 12. The support part main body 11 constitutes the main body of the support part 10. The support part main body 11 is formed in a substantially cylindrical shape overall. The support part main body 11 has a through hole 111 and an annular groove 112. The through hole 111 is provided in the center of the support part main body 11 and is formed to penetrate the support part main body 11 along the central axis of the support part main body 11. The annular groove 112 is formed by being recessed inward from the top surface of the support part main body 11. The annular groove 112 is located between the through hole 111 and the outer peripheral surface of the support part main body 11 and is formed in an annular shape along the outer peripheral surface of the support part main body 11.

[0015] The cover portion 12 forms the top surface of the support portion 10. The cover portion 12 has a substantially circular outer shape in a plan view. As shown in FIG. 3 etc., the cover portion 12 covers the annular groove 112 of the support portion main body 11. In this case, the cover portion 12 has a protrusion 121 that can fit into the annular groove 112. In the support portion 10, an internal space S is formed by the annular groove 112 and the protrusion portion 121. The internal space S is formed around the entire circumference of the support portion 10. The tank main body 20 is formed in the shape of a container with one side open. The tank main body 20 is capable of containing powder paint therein.

[0016] The injector 6 sucks in the powder paint from the paint tank 5 and supplies it to the paint gun 4. The injector 6 is connected to the paint gun 4 by a paint hose 6a. The injector 6 is located near the paint gun 4. This allows the length of the paint hose 6a connecting the injector 6 and the paint gun 4 to be shortened. This enables the paint gun 4 to paint using a low volume of air, improving the paint transfer efficiency.

[0017] The injector 6 is supplied with, for example, carrier air, which sucks powder paint from the paint tank 5. As shown in FIG. 3, the injector 6 is connected to, for example, the side surface of the paint tank 5. In this embodiment, the inlet side of the injector 6 is connected to the support body 11 of the paint tank 5. In this case, a paint passage 5a is formed inside the paint tank 5. A portion of the paint passage 5a penetrates the outer peripheral wall 201 of the tank body 20. In other words, a portion of the paint passage 5a is formed between the outer peripheral surface and the inner peripheral surface of the tank body 20. The paint passage 5a is formed to communicate between the inside of the tank body 20 and the injector 6 when the tank body 20 is attached to the support 10. The powder paint in the tank body 20 is supplied to the injector 6 via the paint passage 5a, as indicated by the black arrow in FIG. 3.

[0018] The system 1 includes an agitation mechanism 30. The agitation mechanism 30 agitates the powder paint in the paint tank 5. As shown in FIG. 4 and other figures, the agitation mechanism 30 includes a drive unit 31, a shaft 32, a magnetic coupling 33, and an agitator 34. The drive unit 31 includes a motor, such as a stepping motor or a brushless motor, and is driven by power supplied from an external power supply. The motor is electrically connected to a control device (not shown), and the drive of the motor is controlled by the control device. As shown in FIGS. 2 and 4 and other figures, the drive unit 31 is located above the paint tank 5 and attached to a connecting member 41. The connecting member 41 is formed of, for example, a substantially rectangular plate-like member and is mounted on the top surface of the support unit 10. The connecting member 41 extends across the through-hole 111 of the support unit main body 11.

[0019] 4, when the tank body 20 is attached to the support part 10, the tip side of the drive part 31 passes through the connecting member 41 and is positioned inside the through-hole 111 of the support part body 11. In this case, the output shaft 311 of the drive part 31 is positioned inside the through-hole 111. The shaft 32 extends along the axial direction of the paint tank 5. The base end side of the shaft 32 is connected to the output shaft 311 of the drive part 31. On the other hand, the tip side of the shaft 32 is connected to the magnetic coupling 33.

[0020] The magnetic coupling 33 is for transmitting the driving force of the drive unit 31 to the stirrer 34 in a non-contact manner. The magnetic coupling 33 has a drive-side magnet portion 331 and a driven-side magnet portion 332. The drive-side magnet portion 331 is connected to the shaft 32 and rotates as the drive unit 31 is driven. The driven-side magnet portion 332 can be attracted to the drive-side magnet portion 331 by magnetic force, with a partition member 35 provided on the bottom surface of the support unit main body 11 sandwiched between them. In other words, the driven-side magnet portion 332 faces the drive-side magnet portion 331 with the partition member 35 sandwiched between them. The driven-side magnet portion 332 is connected to the base end side of the stirrer 34.

[0021] The partition member 35 closes the tip side of the through hole 111. The partition member 35 is replaceably attached to the support body 11. The partition member 35 is attached to the support body 11, for example, by fitting with the support body 11 and using an adhesive. The adhesive is, for example, an anaerobic adhesive. The partition member 35 separates the drive-side magnet portion 331 and the driven-side magnet portion 332. When the drive-side magnet portion 331 and the driven-side magnet portion 332 are attracted to each other, the partition member 35 is separated from the drive-side magnet portion 331 and in contact with the driven-side magnet portion 332. When the rotational force of the drive-side magnet portion 331 is transmitted to the driven-side magnet portion 332, the driven-side magnet portion 332 rotates while in contact with the partition member 35.

[0022] The partition member 35 is made of a material that is abrasion-resistant and slippery, such as nylon or polyacetal. The partition member 35 is preferably made of a material that is conductive, for example. This makes it possible to prevent the paint in the tank body 20 from becoming electrically charged when the powder paint in the paint tank 5 is stirred.

[0023] The agitator 34 can be placed inside the tank body 20 when the tank body 20 is attached to the support 10. Furthermore, when the tank body 20 is detached from the support 10, the agitator 34 can be handled independently of the paint tank 5. The agitator 34 receives the rotational force of the magnetic coupling 33 to agitate the powder paint inside the tank body 20. The agitator 34 has the function of increasing the fluidity of powder paint, which is more difficult to pressurize and has lower fluidity than liquid paint. As shown in FIG. 4 and other figures, the agitator 34 has a shaft 341 and multiple rotating blades 342. The shaft 341 extends along the axial direction of the paint tank 5. The base end of the shaft 341 is connected to the driven-side magnet 332. That is, the agitator 34 can be handled integrally with the driven-side magnet 332.

[0024] The plurality of rotary vanes 342 extend outward from the outer peripheral surface of the shaft portion 341. As shown in FIGS. 4 and 5, the outer peripheral surface of the rotary vanes 342 is formed in a shape that follows the inner peripheral surface of the tank body 20. This makes it easy to position the rotary vanes 342 within the tank body 20. The rotary vanes 342 are also formed in a shape that has a hollowed-out interior. As shown in FIG. 6 and other figures, the plurality of rotary vanes 342 are provided in numbers of, for example, three, and are positioned so that they are asymmetrical in a plan view. This makes it easy to mix air into the powder paint while reducing paint resistance. The plurality of rotary vanes 342 rotate by receiving the rotational force of the magnetic coupling 33, thereby drawing in surrounding air and imparting fluidity to the powder paint.

[0025] With the tank body 20 attached to the support part 10, when the driving force of the driving part 31 is transmitted to the driving-side magnet part 331 via the shaft 32, the attractive force between the driving-side magnet part 331 and the driven-side magnet part 332 transmits the rotational force of the driving-side magnet part 331 to the driven-side magnet part 332. Then, as the agitator 34 is rotated in conjunction with the rotation of the driven-side magnet part 332, the powder paint in the tank body 20 mixes with the air, improving the fluidity of the powder paint.

[0026] Next, a detailed description will be given of the configuration for attaching and detaching the support part 10 and the tank body 20 of the paint tank 5. As shown in FIG. 4, the system 1 includes a detachment mechanism 50. The detachment mechanism 50 is for attaching and detaching the support part 10 and the tank body 20 without contact. The detachment mechanism 50 includes a support part 51, an annular member 52, a sealing member 53, a positioning member 54, a support part-side magnet 55, and a tank body-side magnet 56. The support part 51 is formed, for example, by a long bolt. The base end of the support part 51 is attached to the connecting member 41 by a nut (not shown). The support part 51 is provided at each end of the connecting member 41. In other words, multiple support parts 51 (two in this case) are provided. In this case, the connecting member 41 has a hole 411 formed at a position corresponding to the support part 51, penetrating the connecting member 41 in the thickness direction. The tip side of the support part 51 extends into the annular groove 112 through a through-hole 122 formed in the cover part 12. The through-hole 122 is formed so as to penetrate the cover part 12 in the thickness direction.

[0027] The annular member 52 is located within the internal space S of the support unit 10. The annular member 52 is formed in a shape corresponding to the shape of the annular groove 112. In this embodiment, the annular member 52 is formed in an annular shape. The annular member 52 is connected to the tip end of the support unit 51. Therefore, as shown in FIG. 4, the annular member 52 and the drive unit 31 are integrally configured via the connecting member 41. The annular member 52 has, for example, a substantially H-shaped cross section. In this case, the annular member 52 has two plate-shaped flanges 521 and 522 arranged opposite each other and a web 523 connecting the flanges 521 and 522. The flange 521 is located on the base end side of the paint tank 5. The flange 522 is located on the tip end side of the paint tank 5.

[0028] The seal member 53 is formed of, for example, an O-ring, and is provided in an annular shape around the annular member 52. The seal member 53 fills the gap between the web 523 and the inner wall of the annular groove 112. The seal member 53 has an inner seal member 531 and an outer seal member 532. The inner seal member 531 is located radially inward of the web 523 from the support part 10. The outer seal member 532 is located radially outward of the web 523 from the support part 10.

[0029] The positioning member 54 is used to position the tank body 20 in the circumferential direction relative to the support part 10 when attaching the tank body 20 to the support part 10. The base end side of the positioning member 54 is fixed inside the bottom side of the support part body 11. The tip side of the positioning member 54 is exposed from the bottom surface of the support part body 11. The tip side of the positioning member 54 is formed in, for example, a cylindrical shape. A plurality of positioning members 54 are provided at positions facing each other across the central axis of the support part 10. A receiving portion 202 is formed on the top surface of the tank body 20 at a position corresponding to the positioning member 54. The receiving portion 202 is formed by recessing the top surface of the tank body 20 inward, and the tip side of the positioning member 54 can be inserted into the receiving portion 202.

[0030] The support-side magnets 55 and the tank body-side magnets 56 are made of permanent magnets such as neodymium magnets. As shown in FIG. 7, a plurality of support-side magnets 55 are provided at predetermined intervals in the circumferential direction of the support body 11. As shown in FIG. 9, the support-side magnets 55 are attached to the flange 522 side of the annular member 52. The base end sides of the support-side magnets 55 are embedded and fixed in the flange 522, for example. The plurality of support-side magnets 55 are arranged at intervals around the entire circumference of the annular member 52. The plurality of support-side magnets 55 are arranged with different poles alternately arranged in the circumferential direction of the annular member 52. In other words, the plurality of support-side magnets 55 are arranged with south poles and north poles alternately arranged in the circumferential direction. The interval between adjacent support-side magnets 55 is set so that the magnetic forces of one support-side magnet 55 and the other support-side magnet 55 do not affect each other.

[0031] 9, the tip side of the support-side magnet 55 is accommodated in the recess 113 of the support body 11 when the tank body 20 is attached to the support 10. In other words, the recess 113 can accommodate the tip side of the support-side magnet 55 when the tank body 20 is attached to the support 10. The depth of the recess 113 is set to be approximately the same as or slightly smaller than the amount of protrusion of the support-side magnet 55 from the flange 522, for example.

[0032] As shown in Figure 9 and other figures, a plurality of tank body-side magnets 56 are provided at positions facing the support part-side magnets 55 when the tank body 20 is attached to the support part 10. In other words, when the tank body 20 is attached to the support part 10, the tank body-side magnets 56 are arranged at positions overlapping the support part-side magnets 55 in the axial direction of the paint tank 5. When the positioning member 54 is inserted into the receiving part 202, the support part-side magnets 55 and the tank body-side magnets 56 facing each other are arranged so that their magnetic poles are opposite.

[0033] For example, the magnetic pole of the tank body side magnet 56 facing the support part side magnet 55 with an S pole is the N pole, and the magnetic pole of the tank body side magnet 56 facing the support part side magnet 55 with an N pole is the S pole. Therefore, when the support part side magnet 55 and the tank body side magnet 56 come close to each other to a predetermined distance, an attractive force is generated. The multiple tank body side magnets 56 are provided on one side of the tank body 20, that is, the top surface. The multiple tank body side magnets 56 are housed inside the tank body 20. In this case, only the top surfaces of the tank body side magnets 56 are exposed to the outside. The top surface of the tank body 20 and the top surfaces of the tank body side magnets 56 are located on approximately the same plane.

[0034] As shown in FIG. 10 , the support part 10 also has multiple compressed air supply paths 15, 16. The multiple compressed air supply paths 15, 16 are paths for supplying compressed air into the internal space S to attract the support part-side magnet 55 and the tank body-side magnet 56 or to cancel the attractive force between them. The multiple compressed air supply paths 15, 16 can supply compressed air for moving the annular member 52 arranged in the internal space S along the axial direction of the paint tank 5. The multiple compressed air supply paths 15, 16 are connected to a compressed air supply source (not shown) that generates compressed air and is constituted by, for example, a compressor, and compressed air is supplied from the compressed air supply source. The multiple compressed air supply paths 15, 16 are each controlled to open and close by an on-off valve (not shown).

[0035] 10 , the internal space S is divided into a first space S1 and a second space S2 by a sealing member 53. The first space S1 is located on the flange 521 side, which is one surface of the annular member 52, in the internal space S. On the other hand, the second space S2 is located on the flange 522 side, which is the other surface of the annular member 52, in the internal space S.

[0036] The compressed air supply path 15 is a path for supplying compressed air into the first space S1, as indicated by arrow A in Fig. 10. On the other hand, the compressed air supply path 16 is a path for supplying compressed air into the second space S2, as indicated by arrow B in Fig. 10. The first compressed air supply path 15 is formed in the cover part 12. The second compressed air supply path 16 is formed in the cover part 12 and the support part main body 11. In this specification, the compressed air supply path 15 may be referred to as the first compressed air supply path 15, and the compressed air supply path 16 may be referred to as the second compressed air supply path 16. The supply of compressed air to the first compressed air supply path 15 and the second compressed air supply path 16 is controlled independently.

[0037] In this configuration, when compressed air is supplied from the first compressed air supply path 15 into the first space S1 and the pressure in the first space S1 increases, the compressed air moves the annular member 52 and the support unit-side magnet 55 toward the tip side of the support unit 10. Then, as shown in FIG. 9 , when the support unit-side magnet 55 has moved until it is accommodated in the recess 113 and the tank body 20 approaches the support unit 10 until it comes into contact with the support unit 10, the tank body 20 is attached to the support unit 10 by the attractive force between the support unit-side magnet 55 and the tank body-side magnet 56. Alternatively, when the tank body 20 is in contact with the support unit 10 and the support unit-side magnet 55 has moved until it is accommodated in the recess 113, the tank body 20 is attached to the support unit 10 by the attractive force between the support unit-side magnet 55 and the tank body-side magnet 56.

[0038] On the other hand, when compressed air is supplied from the second compressed air supply path 16 into the second space S2, the pressure in the second space S2 increases. When this pressure exceeds the attractive force between the support-side magnet 55 and the tank body-side magnet 56, the annular member 52 and the support-side magnet 55 move toward the base end of the support part 10. Then, as shown in FIG. 11 , when the distance between the support-side magnet 55 and the tank body-side magnet 56 becomes equal to or greater than a predetermined value, the attractive force between the support-side magnet 55 and the tank body-side magnet 56 disappears, and the tank body 20 is detached from the support part 10. That is, the support-side magnet 55 moves between a first position where it approaches the tank body-side magnet 56 and is attracted to it when compressed air is supplied from the first compressed air supply path 15 into the first space S1, and a second position where it moves away from the tank body-side magnet 56 and the attraction to the tank body-side magnet 56 is released when compressed air is supplied from the second compressed air supply path 16 into the second space S2.

[0039] In this embodiment, as described above, the annular member 52 and the drive unit 31 are integrally configured via the connecting member 41. Therefore, the shaft 32 and the drive-side magnet portion 331 connected to the drive unit 31 move in conjunction with the movement of the annular member 52. In this case, as shown in FIG. 9 , the drive-side magnet portion 331 is closest to the partition member 35 when the support-side magnet 55 has moved to the first position. In this state, when the driven-side magnet portion 332 connected to the agitator 34 is brought closer to the partition member 35, the drive-side magnet portion 331 and the driven-side magnet portion 332 are attracted to each other, and the driven-side magnet portion 332 comes into contact with the partition member 35, thereby attaching the agitator 34 to the support unit 10. With compressed air being supplied into the first space S1 from the first compressed air supply path 15, the operator brings the driven-side magnet portion 332 into contact with the partition member 35, and then attaches the tank body 20 to the support unit 10. In this way, the powder paint in the tank body 20 can be supplied to the coating gun 4 while being stirred.

[0040] 11, when the support part-side magnet 55 has moved to the second position, the attraction between the drive-side magnet part 331 and the driven-side magnet part 332 is released. In this state, the agitator 34 is housed, for example, within the tank main body 20. By supplying compressed air from the second compressed air supply path 16 into the second space S2, the operator can detach the driven-side magnet part 332 from the partition member 35 and remove the tank main body 20 from the support part 10.

[0041] According to the embodiment described above, the powder coating system 1 includes a paint gun 4, a paint tank 5, and a connecting unit 3. The paint gun 4 applies powder paint. The paint tank 5 stores the powder paint to be supplied to the paint gun 4. The connecting unit 3 integrally supports the paint gun 4 and the paint tank 5. The paint tank 5 has a support unit 10 attached to the connecting unit 3 and a tank body 20 formed in a container shape with one side open and configured to be detachable from the support unit 10. This allows efficient powder coating without providing an additional device for recovering and reusing the powder. This allows for space and energy savings related to powder coating.

[0042] The powder coating system 1 further includes an agitation mechanism 30. The agitation mechanism 30 is for agitating the powder paint in the paint tank 5. This ensures the fluidity of the powder paint in the paint tank 5. This allows the powder paint to be stably supplied from the paint tank 5 to the paint gun 4.

[0043] The stirring mechanism 30 also has a drive unit 31, a stirrer 34, and a magnetic coupling 33. The stirrer 34 can be placed inside the tank body 20 with the tank body 20 attached to the support unit 10. The magnetic coupling 33 is used to transmit the driving force of the drive unit 31 to the stirrer 34 in a non-contact manner. This allows the stirrer 34 to be attached and detached using the magnetic coupling 33, improving the ease of maintenance regarding cleaning of the stirrer 34.

[0044] The agitator 34 is configured to include a plurality of rotary vanes 342. The rotary vanes 342 are formed so that their outer peripheral surfaces conform to the inner peripheral surface of the tank body 20 and their insides are hollowed out. This improves the ease of installation of the rotary vanes 342, while also facilitating mixing of the powder paint in the tank body 20 with air, further improving the fluidity of the powder paint.

[0045] The powder coating system 1 further includes a detachment mechanism 50. The detachment mechanism 50 is for attaching and detaching the support part 10 and the tank body 20 without contact. The detachment mechanism 50 has an annular member 52, a plurality of support part-side magnets 55, and a plurality of tank body-side magnets 56. It is disposed within an internal space S formed in an annular shape along the outer peripheral surface of the support part 10. The plurality of support part-side magnets 55 are attached to the other surface of the annular member 52 and are disposed at intervals around the entire circumference of the annular member 52. The plurality of tank body-side magnets 56 are disposed on one surface of the tank body 20 in positions facing the support part-side magnets 55.

[0046] The support unit 10 has multiple compressed air supply paths 15, 16. The multiple compressed air supply paths 15, 16 supply compressed air to a first space S1 located on one side of the annular member 52 in the internal space S and a second space S2 located on the other side of the annular member 52. The support unit-side magnet 55 moves between a first position and a second position. The first position is a position where the support unit-side magnet 55 approaches the tank body-side magnet 56 and is attracted to the tank body-side magnet 56 when compressed air is supplied from the compressed air supply path 15 into the first space S1. The second position is a position where the support unit-side magnet 55 moves away from the tank body-side magnet 56 and is no longer attracted to the tank body-side magnet 56 when compressed air is supplied from the compressed air supply path 16 into the second space S2.

[0047] This allows the tank body 20 to be attached to and detached from the support portion 10 at low cost, and also allows space saving for powder coating.

[0048] Furthermore, the multiple support-side magnets 55 are arranged with different poles alternately aligned in the circumferential direction of the annular member 52. This allows the multiple tank body-side magnets 56 to be attracted to predetermined positions in accordance with the magnetic poles of the multiple support-side magnets 55. This makes it easy to position the tank body 20 when attaching it to the support 10.

[0049] The powder coating system 1 further includes an injector 6 and a paint passage 5a. The injector 6 is used to suck powder paint from the tank body 20 and supply it to the paint gun 4. The paint passage 5a is formed inside the paint tank 5 and is configured to connect the inside of the tank body 20 with the injector 6 when the tank body 20 is attached to the support part 10. This allows the paint passage 5a to be configured short, which enables a variety of coating methods to be performed, such as coating with low-volume air.

[0050] The above-described embodiments are presented as examples, and are not limited to the embodiments described above and shown in the drawings, but can be modified as appropriate within the scope of the gist of the invention. [Explanation of symbols]

[0051] 1... powder coating system, 3... connection part, 4... paint gun, 5... paint tank, 10... support part, 20... tank body

Claims

1. a paint gun for applying powder paint; a paint tank for storing powder paint to be supplied to the paint gun; a connecting portion that integrally supports the paint gun and the paint tank, The paint tank has a support part attached to the connecting part, and a tank body formed in a container shape with one side open and configured to be attachable to and detachable from the support part. Powder coating system.

2. Further provided is a stirring mechanism for stirring the powder paint in the paint tank.

10. The powder coating system of claim 1.

3. The stirring mechanism includes: A drive unit; a stirring body that can be placed in the tank body with the tank body attached to the support part; a magnetic coupling for transmitting the driving force of the drive unit to the stirring body in a non-contact manner; 3. The powder coating system of claim 2.

4. The stirring body is configured to include a plurality of rotating blades, The rotating blades are formed so that the outer peripheral surface thereof conforms to the inner peripheral surface of the tank body and the inside is hollowed out.

4. The powder coating system of claim 3.

5. Further provided is a detachment mechanism for attaching and detaching the support part and the tank main body in a non-contact manner, The attachment / detachment mechanism includes: an annular member disposed in an internal space formed annularly along an outer peripheral surface of the support portion; a plurality of support portion side magnets attached to the other surface of the annular member and arranged at intervals around the entire circumference of the annular member; a plurality of tank body side magnets provided on one surface of the tank body at positions facing the support part side magnets, the support portion has a plurality of compressed air supply paths that supply compressed air to a first space located on one surface side of the annular member in the internal space and a second space located on the other surface side of the annular member, The support portion side magnet moves between a first position where it approaches the tank body side magnet and is attracted to the tank body side magnet when compressed air is supplied from the compressed air supply path into the first space, and a second position where it moves away from the tank body side magnet and is released from attraction to the tank body side magnet when compressed air is supplied from the compressed air supply path into the second space.

10. The powder coating system of claim 1.

6. The plurality of support portion side magnets are arranged with different poles alternately arranged in the circumferential direction of the annular member.

6. The powder coating system of claim 5.

7. an injector for sucking the powder paint in the tank body and supplying it to the spray gun; a paint passage formed inside the paint tank and configured to communicate the inside of the tank body with the injector when the tank body is attached to the support part, 7. A powder coating system according to any one of claims 1 to 6.

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