JP2014014781A - Painting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently accomplish washing work by reducing washing time when changing colors, and restricting a waste liquid quantity caused during the washing.SOLUTION: A painting system includes: a pump assemblage 20 having a plurality of pumps 18 dedicated to each paint color of a paint material; a drive power transmitting mechanism 24 having, on the one hand, discoidal magnetic bodies 66 connected on a pump 18 side, and on the other hand discoidal magnetic bodies 82 connected on a side of a driving motor 22 for driving a selected prescribed pump 18, which are arranged so as to interpose a partition wall plate 68 formed of a non-magnetic body and so as to face each other using a predetermined alienating interval, in order to transmit drive power of the driving motor 22 to the selected prescribed pump 18; and a displacement mechanism 28 having a displacement motor 26 for rotating a ball screw shaft 74, and displacing the driving motor 22 between the plurality of pumps 18 in order to switch pumps 18 to be driven.

Description

  The present invention relates to a coating system having a dedicated pump for each paint color supplied to a paint gun.

  Conventionally, for example, it is known to discharge paint from a paint gun arranged in a painting line toward an object to be painted such as an automobile body, and continuously paint the automobile body that is sequentially conveyed in a predetermined color. .

  As this type of coating apparatus, for example, Patent Document 1 discloses a cartridge type coating apparatus. This cartridge-type coating apparatus includes a cartridge that is detachably and replaceably attached to a coating machine, and supplies the paint stored in the cartridge toward the coating machine. In this cartridge-type coating apparatus, for example, internally applied electrostatic coating can be performed using a water-soluble paint, and a new cartridge having a desired coating color is removed by removing the cartridge mounted on the coating machine. It is said that the color of the paint discharged from the paint gun can be changed by replacing the cartridge after mounting.

  For this reason, in the cartridge type coating device, it is necessary to prepare a plurality of cartridges of a desired color necessary for color change, and even a cartridge filled with the same color paint is necessary and sufficient for painting the automobile body. It is necessary to prepare several.

Japanese Patent Laid-Open No. 2005-230718

  By the way, in the cartridge-type coating apparatus disclosed in Patent Document 1, when the paint distribution route is cleaned at the time of color change, it is necessary to clean the entire paint supply path from the cartridge attachment / detachment site to the coating gun. There is a problem that a large amount of cleaning liquid is supplied to clean the entire supply passage, and that the cleaning work takes a long time.

  In addition, there is another problem that a large amount of waste liquid is generated after cleaning corresponding to a large amount of cleaning liquid for cleaning the paint supply passage.

  The present invention has been made in view of the above points, and can reduce the cleaning time at the time of color change and can efficiently perform the cleaning operation by suppressing the amount of waste liquid generated at the time of cleaning as much as possible. The purpose is to provide a painting system.

  In order to achieve the above-mentioned object, the present invention provides a plurality of dedicated pumps for each paint color in a paint system using a pump that quantitatively feeds paint supplied from a paint supply source toward a paint gun. A pump group, a driving unit for driving a predetermined pump selected from the pump group, a driving force transmission mechanism for transmitting a driving force of the driving unit to the selected predetermined pump, and the driving unit And a displacement mechanism for switching a pump driven by displacing the pump among the plurality of pumps.

  According to the present invention, a dedicated pump for each paint color is provided, and the pump driven by the displacement mechanism is switched to eliminate the need for cleaning the pump when changing colors. For example, a cleaning liquid supply path is provided downstream of the pump. It can range from a color change valve to a painting gun. For this reason, in this invention, compared with the past, the supply path | route of a washing | cleaning liquid can be shortened, the required amount of a washing | cleaning liquid can be reduced, and the waste liquid amount after washing | cleaning can be suppressed as much as possible. As a result, the cost for waste liquid treatment can be reduced and the cost can be reduced. Further, according to the present invention, the color change cleaning time is shortened as compared with a so-called conventional cartridge system in response to a decrease in the required amount of cleaning liquid, so that the efficiency of the cleaning operation can be achieved.

  Further, according to the present invention, the driving means includes a driving motor, the displacement mechanism includes a ball screw mechanism that displaces the driving motor between the plurality of pumps, and the ball screw mechanism includes a ball screw shaft. And a displacement motor that rotates the ball screw shaft, and a ball nut that is connected to the drive motor and is displaced along the ball screw shaft integrally with the drive motor.

  According to the present invention, by rotating the ball screw shaft by the displacement motor and displacing the drive motor, it becomes possible to selectively drive a plurality of all-colored pumps constituting the pump group. . As a result, it is possible to easily and inexpensively cope with a change / addition of the coating color of the paint discharged from the coating gun. In addition, by configuring the displacement mechanism with a ball screw shaft, a ball nut, and the like, the drive motor can be accurately positioned at a position facing the selected desired pump.

  Further, according to the present invention, the driving force transmission mechanism is disposed opposite to each other with a predetermined distance between the partition plates formed of a non-magnetic material, and is connected to the pump side, and the drive And the other magnetic body connected to the motor side.

  According to the present invention, the rotational driving force of the driving motor is applied to the pump by the attraction action (magnetic action) of one magnetic body connected to the pump side and the other magnetic body connected to the driving motor side. On the other hand, it can be transmitted smoothly. For this reason, the pump for feeding the desired paint color can be stably driven by displacing the drive motor by the displacement mechanism and positioning it at a position facing the selected desired pump. The pump is configured by a trochoid pump, so that the paint can be supplied quantitatively and continuously stably toward the coating gun.

  Furthermore, in the present invention, the pump group is disposed in an explosion-proof region partitioned by the partition plate, and the ball screw mechanism including the drive motor is disposed in a non-explosion-proof region partitioned by the partition plate. It is characterized by that.

  According to the present invention, the maintenance work can be easily performed by arranging the ball screw mechanism including the drive motor in the non-explosion-proof region.

  Furthermore, the present invention is characterized in that the trochoid pump includes an inner rotor and an outer rotor that mesh with each other, and a rotating shaft that is connected to the inner rotor and rotates the inner rotor, and the one magnetic body includes the rotating shaft and It is connected and arrange | positioned at the sealed magnetic body accommodating chamber in a casing, It is characterized by the above-mentioned.

  According to the present invention, one magnetic body is disposed in a sealed magnetic body housing chamber in the casing, and the rotational driving force is transmitted to the inner rotor via the one magnetic body and the rotating shaft, thereby driving the pump. As a result, the leakage of the paint from the rotating shaft can be avoided and the pump can be driven smoothly.

  In the present invention, it is possible to obtain a coating system capable of shortening the cleaning time at the time of color change and suppressing the amount of waste liquid generated at the time of cleaning as much as possible to efficiently perform the cleaning operation.

It is a schematic block diagram of the coating system which concerns on embodiment of this invention. In the said coating system, it is a schematic block diagram from a coating-material supply part to a pump. In the said coating system, it is a perspective view which shows a pump group, a driving force transmission mechanism, and a displacement mechanism. It is sectional drawing which shows a trochoid pump and a driving force transmission mechanism. It is a longitudinal cross-sectional view of the trochoid pump along the VV line of FIG. (A)-(d) shows operation | movement of a trochoid pump, and is explanatory drawing which showed the state in which a coating material is suck | inhaled and sent out to one cavity for convenience. It is a schematic block diagram of the coating system which concerns on other embodiment of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a schematic configuration diagram of a coating system according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a pump group, a driving force transmission mechanism, and a displacement mechanism in the coating system.

  As shown in FIG. 2, the coating system 10 includes a paint supply unit 12 connected to each color paint supply source (not shown), a dropping unit 14 that drops the paint supplied from the paint supply unit 12, for example, Teflon ( And an insulating cup portion 16 for storing the paint dropped from the dropping portion 14. The paint supply unit 12, the dropping unit 14, and the insulating cup unit 16 are provided for each pump 18 described later. In addition, as the paint, a conductive coating amount including an organic solvent-type paint is used, but any paint of a solvent-type paint or a water-soluble paint can be used.

  Further, as shown in FIG. 1, the coating system 10 continuously supplies a predetermined amount of paint, and a plurality of pumps 18 (one dedicated pump for each color) as a dedicated pump for each paint color. In this embodiment, a pump group 20 having six colors and six pumps), a driving motor (driving means) 22 for driving a predetermined single pump 18 selected from a plurality of pumps 18, and A driving force transmission mechanism 24 that transmits the rotational driving force of the driving motor 22 to a selected pump 18 to drive the pump 18 and the driving motor 22 between the plurality of pumps 18 in a substantially horizontal direction. And a displacement mechanism 28 having a displacement motor 26 for switching the pump 18 driven from one pump 18 to the other pump 18 (see the broken line in FIG. 1).

  The drive motor 22 and the displacement motor 26 are constituted by, for example, servo motors, and the rotation speed and the rotation speed of the servo motors are controlled by a control signal output from a control device (not shown).

  Further, the painting system 10 includes a painting robot R having a robot arm 32 rotatably disposed on a base 30, and a color change valve (which is placed on the robot arm 32 and has the same number of paint valves as the number of paint colors). (Hereinafter referred to as CCV) 34 and a coating gun 36 that discharges the coating material placed on the robot arm 32 and supplied from the CCV 34 toward the object to be coated. The CCV 34 is supplied with a pilot pressure (pilot air) via a pilot valve (not shown), and the state of the paint valve is switched. In FIG. 1, the painting robot R side in the drawing is shown in the vertical direction with an intermediate omitted portion of the piping tube 42 described later as a boundary, and the pump group side in which a plurality of pumps 18 are arranged in parallel is convenient in the horizontal direction. Is shown.

  As shown in FIG. 2, the dropping unit 14 includes a nozzle 38 that drops the coating material supplied from the coating material supply unit 12 toward the insulating cup unit 16. In this case, when internally applied electrostatic coating is performed using a conductive paint such as a water-soluble paint or a metallic paint, when a high voltage is applied to the paint gun 36, the paint supply path is passed through the conductive paint. In addition, a high voltage may be applied, and current may leak to the ground side via the paint supply path.

  Therefore, in the present embodiment, a dropping method is adopted as a method of filling the insulating cup portion 16 with the coating material, and the coating material supplied by the coating material supply portion 12 is intermittently dropped from the dropping portion 14, and the space is set according to the interval of intermittent dropping during the dropping. By interposing, it is in an electrically insulated state to avoid current leakage. As a result, in this embodiment, for example, the internal application type electrostatic coating can be suitably performed using a water-soluble paint or a metallic paint.

  In addition, when painting other than internally applied electrostatic coating with water-soluble paint or metallic paint (for example, non-electrostatic coating, externally applied electrostatic coating, or internally applied electrostatic coating is performed using solvent-based paint) In the case of non-electrostatic coating / external application type electrostatic coating using a metallic paint or a water-soluble paint), the dropping unit 14 and the insulating cup unit 16 are omitted and directly from the coating material supply unit 12. You may make it supply a coating material with respect to the pump 18 (dedicated pump for every coating color). This is because there is no need to worry about leakage current.

  An insulating cup portion 16 capable of storing the paint dripped from the nozzle 38 is disposed in a vertically downward direction spaced apart from the dripping portion 14 by a predetermined distance. The insulating cup portion 16 is formed of a transparent or translucent electrically insulating material. A joint member 40 that supports the insulating cup portion 16 is provided at the lower end portion of the insulating cup portion 16. One end of a piping tube 42 is connected to the joint member 40, and the other end of the piping tube 42 is connected to the pump 18.

  The insulating cup portion 16 is provided with a pair of photosensors 42 and 43 that detect the storage amount of the paint dripped in the insulating cup portion 16 at the upper and lower levels. The pair of photosensors 42 and 43 is, for example, a reflection type in which a light emitting element and a light receiving element face the same direction, and are arranged at a predetermined interval along the vertical vertical direction. In this case, the minimum paint storage amount is detected by the photosensor 42 disposed on the lower side, and the maximum paint storage amount is detected by the photosensor 43 disposed on the upper side.

  Next, each pump 18 constituting the pump group 20 will be described. Each pump 18 is composed of an identically configured trochoid pump. For example, the pumps 18 are eccentric to each other in a casing 44 formed of a non-conductive material such as a resin and a shaft chamber portion 46 formed in a cylindrical hollow shape. The inner rotor 48 and the outer rotor 50 are arranged (see FIG. 4). 3 shows a state in which the casings 44 of the pumps 18 are shared, the present invention is not limited to this. For example, as shown in FIG. 7, the casings 44 are separately provided. It may be configured. Each pump 18 is not limited to a trochoid pump, and other pumps may be used.

  As shown in FIG. 5, the inner rotor 48 has four male trochoidal blades 52 each having a mountain-shaped contour by a trochoid curve and projecting radially outward. A rotation shaft 54 is connected to the center hole of the inner rotor 48, and the inner rotor 48 and the center of the rotation shaft 54 are set to coincide with each other.

  As shown in FIG. 5, the outer rotor 50 has five female trochoidal blades 56 each having a concave contour by a trochoidal curve and being radially depressed toward the radially outward direction. The rotation center O2 of the outer rotor 50 is provided eccentrically at a position offset from the rotation center O1 of the inner rotor 48. A predetermined clearance 58 is formed between the outer peripheral edge of the outer rotor 50 and the shaft chamber portion 46 of the casing 44, and the outer rotor 50 is loosely fitted in the shaft chamber portion 46. In this case, the outer rotator 50 follows the inner rotor 48 by the female trochoid blade 56 of the outer rotor 50 meshing with the male trochoid blade 52 of the inner rotor 48 by the rotational force transmitted from the rotating shaft 54.

  Between the male trochoid blade 52 and the female trochoid blade 56 that mesh with each other (specifically, between the blade tip of the male trochoid blade 52 and the blade tip of the female trochoid blade 56), the insulating cup portion 16 is stored. A cavity 60 is provided for sucking and storing the paint and pushing it out. When the drive motor 22 is energized to drive the pump 18, the paint is sucked into the pump 18 from the inlet port 61a and transferred to the cavity 60, and a predetermined amount of paint is continuously sent out from the outlet port 61b. The In FIGS. 6A to 6D, the operation of the trochoid pump is described for convenience with reference to a paint that is sucked into and delivered from one cavity 60 as an example.

  The casing 44 can be provided with, for example, a cleaning port communicating with the clearance 58 between the outer peripheral edge of the outer rotor 50 and the axial chamber portion 46 of the casing 44. In this embodiment, for each color of paint, Since the dedicated pump 18 is provided, it is not necessary to clean the inside of the pump 18 with a cleaning liquid when changing the color of the paint. For this reason, a cleaning port is not required, and simplification of the pump structure can be achieved.

  Further, as shown in FIG. 4, the casing 44 is provided with a magnetic body accommodation chamber 64 that constitutes a part of the casing 44 and is sealed by a sealing wall 62 that is a non-magnetic body. In the magnetic material storage chamber 64, a disk-shaped magnetic material (one magnetic material) 66 that is rotatably provided via the rotation shaft 54 is accommodated. The rotating shaft 54 is connected to the inner rotor 48, and the rotational force from the disk-shaped magnetic body 66 is transmitted to the inner rotor 48.

  By forming the rotary shaft 54 with, for example, a non-magnetic material such as ceramic, it is possible to ensure electrical insulation and desired rotational torsion strength. The rotation shaft 54 may be provided with a seal member (not shown) (for example, an O-ring) that surrounds and seals the outer peripheral surface of the rotation shaft 54. The seal member (not shown) secures the sealability of the shaft chamber portion 46 where the paint is sucked, and the paint is prevented from entering the magnetic material storage chamber 64 in which the disk-like magnetic material 66 is stored.

  Next, a displacement mechanism 28 that positions the drive motor 22 at a position facing a predetermined pump 18 that is displaced between the plurality of pumps 18 will be described.

  As shown in FIG. 1, the displacement mechanism 28 is composed of a ball screw mechanism disposed on the non-explosion-proof region 70 side partitioned by a partition plate (booth wall) 68, and is fixed to the partition plate 68 so as to be substantially horizontal. A first housing 72 extending along, a displacement motor 26 supported by the first housing 72, and a ball screw shaft 74 coupled to the motor shaft of the displacement motor 26 via a coupling member (not shown). Including.

  Further, the displacement mechanism 28 rolls along a ball nut 76 that moves forward and backward along the axial direction of the ball screw shaft 74 and a circulation track formed between the ball screw shaft 74 and the ball nut 76 (not shown). A plurality of balls, a guide shaft 78 that supports the ball nut 76 and that displaceably guides the ball nut 76, and an end portion of the ball screw shaft 74 that is fixed to the inner wall of the first housing 72 are rotatably supported. And a bearing block 80 having a bearing to be used. In the present embodiment, the ball screw mechanism is used as the displacement mechanism 28, but the present invention is not limited to this, and other mechanisms such as a linear actuator and a fluid pressure cylinder may be used. .

  The ball nut 76 is provided with a driving motor 22 that is integrally coupled with the ball nut 76 and is displaced together with the ball nut 76. The motor shaft of the drive motor 22 is connected to one disk-shaped magnetic body 66 on the pump 18 side and the other disk-shaped magnetic body (the other magnetic body) 82 that can be adsorbed. The magnetized surfaces of one disk-shaped magnetic body 66 and the other disk-shaped magnetic body 82 are arranged to face each other with the partition plate 68 therebetween, and a predetermined clearance is formed between the partition plate 68 and the magnetized surfaces. By adjusting the clearance between the partition plate 68, the strength of the magnetic torque generated between one disk-shaped magnetic body 66 and the other disk-shaped magnetic body 82 can be adjusted.

  On the opposite side (back side) of the first housing 72 on the explosion-proof region 84 side defined by the partition plate 68, a second housing 86 fixed to the partition plate 68 and extending along the substantially horizontal direction is disposed. A plurality of pumps 18 (pump group 20), which are dedicated pumps for each desired paint color, are mounted in parallel on the second housing 86 at predetermined intervals along the substantially horizontal direction.

  A plurality of pumps 18 (pump group 20) are arranged in parallel along the longitudinal direction of the second housing 86 to constitute a pump unit, and a new pump 18 (a pump dedicated to a new paint color) is added. It can be changed. Each pump 18 arranged in parallel in the second housing 86 is connected to the CCV 34 via a piping tube (for example, Teflon hose, Teflon; registered trademark) 42.

  In this case, one disk-shaped magnetic body 66 provided on the pump 18 side is magnetized with an N pole or an S pole. Further, the other disk-shaped magnetic body 82 provided on the drive motor 22 side is magnetized with an S pole or N pole different from the one disk-shaped magnetic body 66 so that they are attracted to each other. Provided.

  As shown in FIG. 1, the entire casing 44 of each pump 18 is accommodated in the internal space of the second housing 86. Further, for example, the casing 44 is fixed to the outer surface of the second housing 86, the rotating shaft 54 and the other disk-shaped magnetic body 82 are projected outside the casing 44, and are connected to the rotating shaft 54 and the rotating shaft 54. The other disk-shaped magnetic body 82 may be disposed so as to face the internal space of the second housing 86 so as to be close to the partition plate 68.

  When the driving mechanism 22 is displaced by the displacement mechanism 28 and the selected predetermined pump 18 and the driving motor 22 are in a position facing each other, the driving force transmission mechanism 24 has the partition plate 68 in between. It is comprised by the one disk-shaped magnetic body 66 by the side of the selected pump 18 which opposes and arrange | positions at predetermined intervals, and the other disk-shaped magnetic body 82 by the side of the drive motor 22 (refer FIG. 4). One disk-shaped magnetic body 66 and the other disk-shaped magnetic body are attracted by the magnetic force between one disk-shaped magnetic body 66 and the other disk-shaped magnetic body 82 that are arranged to face each other in a noncontact state. The body 82 can be simultaneously rotated while being synchronized.

  The rotational driving force of the driving motor 22 can be transmitted to the pump 18 (inner rotor 48) via the driving force transmission mechanism 24 to drive the pump 18. In this case, the partition plate 68 and the sealing wall 62 interposed between the one disk-shaped magnetic body 66 and the other disk-shaped magnetic body 82 are each formed of a non-magnetic material. The magnetic force generated between the plate-like magnetic body 66 and the other disk-like magnetic body 82 is not affected.

  The partition plate 68 that divides the non-explosion-proof region 70 and the explosion-proof region 84 is made of a nonmagnetic material such as aluminum, copper, or brass, and is made of a flat plate having a predetermined thickness.

  Further, a cleaning valve 90 is disposed on the side surface of the partition plate 68 on the explosion-proof region 84 side (see FIG. 1). The cleaning valve 90 is connected to a cleaning liquid supply source (not shown) and is connected to the CCV 34 via a piping tube 92. In this case, the cleaning valve 90 is opened by a control signal from a control device (not shown), so that the cleaning liquid is supplied to the CCV 34 side, and the cleaning valve 90 is closed to the CCV 34 side. The supply of the cleaning liquid is stopped.

  Furthermore, each color paint supplied from each pump 18 is fed to the CCV 34 via the piping tube 42 and discharged from the paint gun 36 toward the object to be coated. The amount of paint supplied to the CCV 34 is set according to the number of rotations of each pump 18.

  The coating system 10 according to the present embodiment is basically configured as described above. Next, the function and effect will be described.

  In this embodiment, a pump group 20 having a plurality of pumps 18 (in this embodiment, six pumps of six colors are illustrated) as dedicated pumps for each paint color (one pump for one color), A driving motor 22 for driving a predetermined single pump 18 selected from the plurality of pumps 18, and a rotational driving force of the driving motor 22 is transmitted to the selected predetermined pump 18 to transmit the pump 18. A driving force transmission mechanism 24 for driving and a displacement motor 26 for switching the pump 18 driven from one pump 18 to the other pump 18 by displacing (moving) the driving motor 22 between the plurality of pumps 18. And a displacement mechanism 28 having.

  In this embodiment, the pump 18 dedicated to each color is provided and the pump 18 driven by the displacement mechanism 28 is switched to eliminate the need for cleaning the pump 18 at the time of color change. Only the CCV 34 to the coating gun 36 are used. Is the cleaning range when changing colors. Therefore, in the present embodiment, the cleaning liquid supply path can be from the CCV 34 disposed on the downstream side of the pump 18 to the coating gun 36. For this reason, in this embodiment, the supply path | route of a washing | cleaning liquid can be shortened significantly compared with the past, the required quantity of a washing | cleaning liquid can be reduced, and the waste liquid quantity after washing | cleaning can be suppressed as much as possible. As a result, the cost for waste liquid treatment can be reduced and the cost can be reduced.

  Conventionally, for example, in order to operate a plurality of explosion-proof motors that drive the pump 18 in a painting booth (explosion-proof region 84), the construction itself such as the installation of a plurality of explosion-proof motors is an explosion-proof construction specification. Cost is higher than normal construction. On the other hand, in the present embodiment, the plurality of pumps 18 constituting the pump group 20 are attached to the partition plate 68 via the second housing 86, so that no explosion-proof electrical work is required and the manufacturing cost can be reduced. it can.

  Further, in this embodiment, the color change cleaning time is greatly shortened as compared with a so-called conventional cartridge system in response to a decrease in the required amount of cleaning liquid, so that the efficiency of the cleaning operation can be achieved. .

  Furthermore, in the present embodiment, the displacement mechanism 28 is provided to selectively drive a plurality of all-colored pumps 18 constituting the pump group 20, and the paint color discharged from the paint gun 36 is applied. Can be dealt with simply and at low cost.

  That is, in the present embodiment, the ball screw shaft 74 is rotated by the displacement motor 26 and the drive motor 22 is displaced, so that the plurality of all-colored pumps 18 constituting the pump group 20 are alternatively driven. Can be made. As a result, the change / addition of the coating color of the paint discharged from the coating gun 36 can be dealt with simply and at low cost. Further, by configuring the displacement mechanism 28 with the ball screw shaft 74 and the ball nut 76, the driving motor 22 can be accurately positioned at a position facing the selected desired pump 18.

  Furthermore, in this embodiment, the attraction action (magnetic force action) between one disk-like magnetic body 66 connected to the pump 18 side and the other disk-like magnetic body 82 connected to the drive motor 22 side. Thus, the rotational driving force of the driving motor 22 can be smoothly transmitted to the pump 18. Therefore, the pump 18 that feeds the desired paint color can be stably driven by displacing the drive motor 22 by the displacement mechanism 28 and positioning it at a position facing the selected desired pump 18. it can. In addition, by using a trochoid pump, the coating material can be quantitatively and continuously supplied stably toward the coating gun 36.

  Furthermore, in the present embodiment, the displacement mechanism 28 (ball screw mechanism) including the drive motor 22 is disposed in the non-explosion-proof region 70, so that maintenance work can be easily performed.

  Furthermore, in the present embodiment, one disk-like magnetic body 66 is disposed in the sealed magnetic body containing chamber 64 in the casing 44, and the rotation is performed via the one disk-like magnetic body 66 and the rotating shaft 54. Since the driving force is transmitted to the inner rotor 48 and the pump 18 is driven, the leakage of the paint from the rotating shaft 54 can be avoided and the pump 18 can be driven smoothly.

  Furthermore, in this embodiment, it is not necessary to mount the pump 18 and the driving motor 22 for driving the pump 18 on the robot arm 32 of the painting robot R, and only the CCV 34 and the painting gun 36 are installed. The load applied to the robot arm 32 can be reduced and reduced. As a result, it is possible to reduce the installation space of the accessory device on the robot arm 32 to achieve a reduction in size and weight of the painting robot R, and it is possible to easily perform maintenance work.

10 Coating system 18 Pump (trochoid pump)
20 Pump group 22 Drive motor (drive means)
24 driving force transmission mechanism 26 motor for displacement 28 displacement mechanism (ball screw mechanism)
36 Coating Gun 44 Casing 48 Inner Rotor 50 Outer Rotor 54 Rotating Shaft 64 Magnetic Material Storage Chamber 66 Disk-shaped Magnetic Material (One Magnetic Material)
68 Bulkhead plate 70 Non-explosion-proof area 74 Ball screw shaft 76 Ball nut 82 Disk-shaped magnetic body (the other magnetic body)
84 Explosion-proof area

Claims (6)

In a painting system using a pump that delivers a fixed amount of paint supplied from a paint supply source toward a paint gun,
A pump group having a plurality of dedicated pumps for each paint color;
Drive means for driving a predetermined pump selected from the pump group;
A driving force transmission mechanism for transmitting the driving force of the driving means to the selected predetermined pump;
A displacement mechanism for switching a drive driven by displacing the driving means between the plurality of pumps;
A coating system characterized by comprising: The coating system according to claim 1,
The drive means comprises a drive motor,
The displacement mechanism comprises a ball screw mechanism that displaces the drive motor between the plurality of pumps,
The ball screw mechanism includes a ball screw shaft, a displacement motor that rotates the ball screw shaft, and a ball nut that is coupled to the drive motor and is displaced along the ball screw shaft integrally with the drive motor. A coating system characterized by comprising: The coating system according to claim 2,
The driving force transmission mechanism is opposed to the partition plate made of a non-magnetic material with a predetermined distance therebetween, and is connected to one magnetic body connected to the pump side and to the driving motor side. A coating system comprising the other magnetic body. The coating system according to any one of claims 1 to 3,
The coating system is characterized in that the pump comprises a trochoid pump. The coating system according to claim 3,
The pump group is disposed in an explosion-proof area partitioned by the partition plate,
The coating system, wherein the ball screw mechanism including the driving motor is disposed in a non-explosion-proof region partitioned by the partition plate. The coating system according to claim 4, wherein
The trochoid pump has an inner rotor and an outer rotor that mesh with each other, and a rotating shaft that is connected to the inner rotor and rotates the inner rotor,
The said one magnetic body is connected with the said rotating shaft, and is arrange | positioned in the sealed magnetic body storage chamber in a casing, The coating system characterized by the above-mentioned.

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