JP2018099639A - Rotary atomization coating device and vehicle body coating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique effective for making a coating quality difference hard to occur between left and right coated surfaces when coating a vehicle using a rotary atomization coating device.SOLUTION: A rotary atomization coating device 1 for coating a vehicle body 50 comprises: a first rotary atomization head 20R arranged facing the right side coated surface 51R of the vehicle body 50; and a second rotary atomization head 20 L arranged facing the left side coated surface 51L located to be bilaterally symmetrical to the right side coated surface 51R. The device is configured so that both of the first and second rotary atomization heads 20R and 20L atomize a coating material by rotation to eject; and the rotation direction of the first head 20R rotating toward the right side coated surface 51R of the vehicle body 50 and the second head 20L and that direction of the second head 20L rotating toward the left side coated surface 51L of the vehicle body 50 become opposite to each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for painting a vehicle body.

  2. Description of the Related Art Conventionally, a rotary atomizing coating apparatus (hereinafter also simply referred to as “coating apparatus”) having a rotary atomizing head that rotates at high speed is used in an intermediate coating and top coating line for painting a vehicle body. This coating apparatus is configured to granulate paint by rotation of a rotary atomizing head and apply it to a painted surface of a vehicle body using air and static electricity.

  An example of such a coating apparatus is disclosed in Patent Document 1. The painting apparatus disclosed in Patent Document 1 includes a pair or a plurality of pairs of bell-type painting guns disposed opposite to the left and right painting surfaces of a vehicle body, and a painting robot that holds a bell-type painting gun at the arm tip. I have. According to this coating apparatus, while rotating the atomizing head of each bell type coating gun and spraying the paint, the paint robot is moved along the trajectory previously taught to move the paint to the left and right sides of the vehicle body. Can be applied to painted surfaces.

JP-A-11-104544

By the way, in the above-described coating apparatus, it is general that the rotary atomizing head of each bell type coating gun is configured to rotate in one predetermined direction. In the case of this configuration, when the rotational direction of one rotary atomizing head is clockwise toward the right-side painted surface of the vehicle body, the rotational direction of the other rotational atomizing head is also clockwise toward the left-side painted surface of the vehicle body. Become. Alternatively, when the rotation direction of one rotary atomizing head is counterclockwise toward the right-side painted surface of the vehicle body, the rotational direction of the other rotary atomizing head is also counterclockwise toward the left-side painted surface of the vehicle body.
Then, the paint sprayed from each rotary atomizing head is scattered so as to flow backward in the rotation direction of each rotary atomizing head when the paint is viewed from the side of each painted surface. In this case, the direction in which the paint flows is asymmetric between the right painted surface and the left painted surface, and a coating quality difference occurs between the right painted surface and the left painted surface.

  The present invention has been made in view of such problems, and makes it difficult for a difference in coating quality to occur between the right painted surface and the left painted surface when a vehicle body is painted using a rotary atomizing coating apparatus. It is intended to provide effective technology.

One embodiment of the present invention provides:
A rotary atomizing coating device for painting a car body,
A first rotating atomizing head disposed to face the right-hand painted surface of the vehicle body;
A second rotating atomizing head disposed opposite to the left painted surface in a position symmetrical to the right painted surface of the vehicle body;
With
The first rotary atomizing head and the second rotary atomizing head both atomize and inject the paint by rotation, and the first rotary atomizing head rotates toward the right-side paint surface of the vehicle body. The rotary atomizing coating apparatus is configured such that a rotating direction and a rotating direction in which the second rotating atomizing head rotates toward the left paint surface of the vehicle body are opposite to each other.

Another aspect of the present invention is:
A vehicle body painting method for painting a vehicle body,
The first rotating atomizing head that atomizes and sprays the paint by rotation is disposed toward the right-hand painted surface of the vehicle body,
A second rotating atomizing head that atomizes and sprays the paint by rotation is disposed toward the left painted surface that is symmetrical to the right painted surface of the vehicle body;
The rotation direction in which the first rotating atomizing head rotates toward the right painted surface of the vehicle body and the rotating direction in which the second rotating atomizing head rotates toward the left painted surface of the vehicle body are opposite to each other. As described above, there is a vehicle body painting method in which the first rotary atomizing head and the second rotary atomizing head are rotationally driven.

According to the above-described rotary atomizing coating apparatus and the vehicle body coating method, the first rotary atomizing head and the second rotary atomizing head rotate in directions opposite to each other toward the target coating surface during the painting operation.
For example, when the rotation direction of the first rotary atomizing head is clockwise (clockwise) toward the right side paint surface of the vehicle body, the rotation direction of the second rotary atomizing head is counterclockwise toward the left side paint surface of the vehicle body. (Counterclockwise). Alternatively, when the rotation direction of the first rotary atomizing head is counterclockwise (counterclockwise) toward the right side paint surface of the vehicle body, the rotation direction of the second rotary atomizing head is right toward the left side paint surface of the vehicle body. Turn (clockwise).
In this case, the flow direction of the paint sprayed from the rotary atomizing head is substantially symmetric between the right and left paint surfaces, so that a difference in paint quality hardly occurs between the right and left paint surfaces of the vehicle body. .

  As described above, according to each of the above aspects, a coating quality difference is unlikely to occur between the right painted surface and the left painted surface when the vehicle body is painted using the rotary atomizing coating apparatus.

The figure which looked at the rotary atomization coating apparatus of Embodiment 1 from the front. The figure which looked at the rotary atomization coating apparatus of FIG. 1 from upper direction. Side view. The figure which shows the cross-section of the 1st coating machine in FIG. The figure which shows typically the flow of the shaping air which blows off from an air blower outlet in the 1st coating machine of FIG. The figure which shows typically the fastening structure of the 1st rotation atomization head and a drive shaft in a 1st coating machine. The figure which shows typically the fastening structure of the 2nd rotation atomization head and a drive shaft in a 2nd coating machine. The figure which shows typically a mode when applying a coating material to the right side coating surface of a vehicle body using a 1st coating machine. The figure which shows typically a mode when applying a coating material on the left side coating surface of a vehicle body using a 2nd coating machine. The figure which shows typically the fastening structure of a 1st rotation atomization head and a drive shaft in the rotation atomization coating apparatus of Embodiment 2. FIG. The figure which shows typically the fastening structure of a 2nd rotation atomization head and a drive shaft in the rotation atomization coating apparatus of Embodiment 2. FIG. The figure which shows typically a mode when applying a coating material to the right side coating surface of a vehicle body using the 1st coating machine of FIG. The figure which shows typically a mode when applying a coating material on the left side coating surface of a vehicle body using the 2nd coating machine of FIG. The figure which shows typically a mode when applying a coating material to the several coating surface of a vehicle body using the 1st coating machine and 2nd coating machine in FIG.

The rotary atomizing coating apparatus includes an air outlet for blowing atomizing shaping air toward the paint sprayed from each of the first rotary atomizing head and the second rotary atomizing head, It is preferable that the shaping air blown out from the air outlet is twisted in the direction opposite to the rotational direction of the rotary atomizing head.
According to this configuration, the shaping air collides with the paint sprayed from each rotary atomizing head so as to intersect the scattering direction, and the atomization of the paint can be promoted.

In the rotary atomizing coating apparatus, the first rotary atomizing head and the second rotary atomizing head are both screwed coaxially with a drive shaft for rotationally driving the rotary atomizing head. It is preferable that the rotary atomizing head is fastened and fixed to the drive shaft and is configured to rotate in the screwing direction of the screwing.
According to this configuration, the rotation direction of each rotary atomizing head coincides with the direction in which the screwing with the drive shaft is strengthened. For this reason, it is possible to prevent the fastening between each rotary atomizing head and the drive shaft from being released during the painting operation.

In the rotary atomizing coating apparatus, it is preferable that both the first rotary atomizing head and the second rotary atomizing head are configured to rotate only in one preset direction.
According to this configuration, each rotating atomizing head always rotates in one direction during rotation. For this reason, the control which reverses the rotation direction of the rotary atomizing head is not necessary, and the structure of the coating apparatus can be simplified.

  Hereinafter, an embodiment of a rotary atomizing coating apparatus (hereinafter simply referred to as “coating apparatus”) will be described with reference to the drawings.

  In the drawings for explaining the coating apparatus, the front of the vehicle body to be painted is indicated by an arrow FR, the upper portion of the vehicle body is indicated by an arrow UP, the right side of the vehicle body is indicated by an arrow R, and the left side of the vehicle body is indicated. This is indicated by an arrow L. Further, the axial direction of the rotary atomizing head is indicated by an arrow X, and the width direction of the coating apparatus is indicated by an arrow Y.

(Embodiment 1)
As shown in FIGS. 1 and 2, the coating apparatus 1 according to the first embodiment is for coating a vehicle body 50. In the intermediate coating and top coating lines of the vehicle body 50, the vehicle body 50 is conveyed into the painting booth B while being supported by the painting carriage T.

  The painted surface 51 of the vehicle body 50 includes a right painted surface 51R constituting the right side surface of the vehicle body 50 and a left painted surface 51L constituting the left side surface of the vehicle body 50.

  The right painted surface 51 </ b> R is configured as a right side body (hereinafter also referred to as “right side body 51 </ b> R”) from the right front hinge pillar to the right rear fender in the body shell of the vehicle body 50.

  Similarly, the left painted surface 51L is constituted by a left side body (hereinafter also referred to as “left side body 51L”) from the left front hinge pillar to the left rear fender in the body shell of the vehicle body 50.

  Here, the left painted surface 51 </ b> L is a painted surface that is symmetrical to the right painted surface 51 </ b> R of the vehicle body 50. That is, the right painted surface 51R and the left painted surface 51L are symmetrical with respect to a vehicle center line extending in the front-rear direction of the vehicle body 50 (see vehicle body center line M shown in FIG. 2).

  The painting apparatus 1 includes two painting machines 10R and 10L, two painting robots 30 and 30, and a control device 40.

  The first painting machine 10R is used for painting the right painted surface 51R of the vehicle body 50, but is not used for painting the left painted surface 51L of the vehicle body 50. During the operation of the coating apparatus 1, a first rotary atomizing head 20 </ b> R (hereinafter referred to as “first bell 20 </ b> R”) that constitutes the first coating machine 10 </ b> R is disposed to face the right-side painted surface 51 </ b> R of the vehicle body 50.

  The second painting machine 10L is paired with the first painting machine 10R and is used to paint the left painted surface 51L of the vehicle body 50, but is not used for painting the right painted surface 51R of the vehicle body 50. During the operation of the coating apparatus 1, a second rotary atomizing head 20L (hereinafter referred to as “second bell 20L”) constituting the second coating machine 10L is disposed so as to face the left painted surface 51L of the vehicle body 50. .

  Of the two painting robots 30, 30, one painting robot 30 is assigned to the first painting machine 10R, and the other painting robot 30 is assigned to the second painting machine 10L.

  A robot arm 31 of one painting robot 30 is attached to the holding frame 2 that holds the first painting machine 10R. For this reason, the one painting robot 30 places the first painting machine 10R opposite to the right painting surface 51R of the vehicle body 50, and the first painting machine 10R arranged opposite to the right painting surface 51R to the right painting surface 51R. It is comprised as a drive part for moving along.

  Similarly, the robot arm 31 of the other painting robot 30 is attached to the holding frame 2 that holds the second painting machine 10L. For this reason, the other painting robot 30 places the second painting machine 10L opposite to the left side painting surface 51L of the vehicle body 50 and the second painting machine 10L arranged opposite to the left side painting surface 51L to the left painting surface 51L. It is comprised as a drive part for moving along.

  The control device 40 includes a known CPU, memory, input / output unit, and the like. The control device 40 includes a coating machine control unit 41 and a robot control unit 42.

  The coating machine control unit 41 has a function of controlling the two coating machines 10R and 10L. According to the coating machine control unit 41, the start and stop of the two coating machines 10R and 10L are controlled, and the rotation speeds of the two bells 20R and 20L are adjusted when the two coating machines 10R and 10L are started.

  The robot control unit 42 has a function of controlling the painting robot 30. According to the robot control unit 42, the position and posture of the two coating machines 10R and 10L are changed by moving the robot arm 31 of each painting robot 30 according to the movement locus taught in advance.

Next, the detailed structure of the first coating machine 10R will be described with reference to FIGS.
Since the overall structure of the second coating machine 10L is the same as that of the first coating machine 10R, only the overall structure of the first coating machine 10R will be described below. Only differences from the one coating machine 10R will be described.

  As shown in FIG. 3, the first painting machine 10R includes a housing 10a, an air motor 14, and a first bell 20R.

  The housing 10a houses the air motor 14 and the first bell 20R. The housing 10a includes an air supply portion (air supply path) 12 connected to an air supply source (not shown) at a portion close to the outer surface thereof. A part of the air flowing in from the inlet 12a of the air supply unit 12 is used in the air motor 14 for the thrust direction air bearing and the radial direction air bearing. A part of the air is used for driving air for driving the air motor 14. Further, the remainder of the air is used as shaping air blown out from the air outlet 12b of the air supply unit 12. A plurality of air outlets 12b of the air supply unit 12 are provided at equal intervals along the circumferential direction of the housing 10a.

  The air motor 14 is configured as an actuator that rotationally drives the first bell 20R. The air motor 14 has a drive shaft 16 for rotationally driving the first bell 20R. The bell cup 21 of the first bell 20 </ b> R is fastened and fixed to the drive shaft 16 by being coaxially screwed with the drive shaft 16 of the air motor 14. Specifically, the female screw 21a provided on the bell cup 21 and the male screw 16a provided on the outer peripheral surface of the drive shaft 16 are configured to be screwed together on the same virtual axis. The bell cup 21 is fastened and fixed to the drive shaft 16 by the increased screwing. In this case, the first bell 20 </ b> R is directly connected to the drive shaft 16.

  The air motor 14 is an air-driven motor, and a turbine 15 is fixed to the drive shaft 16 thereof. A plurality of blades 15 a arranged at equal intervals in the circumferential direction are provided on the outer peripheral surface of the turbine 15. The drive shaft 16 rotates when air is supplied to the plurality of blades 15 a of the turbine 15. As a result, the first bell 20 </ b> R is centered on the rotational axis A that is a virtual central portion in the radial direction of the drive shaft 16 in a state where the male screw 16 a of the drive shaft 16 is screwed into the female screw 21 a of the bell cup 21. It rotates integrally with the air motor 14.

  Although not particularly illustrated, the first coating machine 10R includes a rotation speed sensor. Based on the actual rotation speed of the first bell 20R detected by the rotation speed sensor, the coating machine control unit 41 supplies the rotation speed to the turbine 15 of the air motor 14 so as to match the target rotation speed. The air amount is feedback-controlled. Thereby, the rotation speed of the first bell 20R is controlled to the target rotation speed.

  For details of the turbine 15 constituting the air motor 14, for example, the turbine 5 disclosed in Japanese Utility Model Laid-Open No. 60-151555 is referred to. Therefore, in this specification, the further detailed description of the turbine 15 is abbreviate | omitted by using this gazette.

  A paint pipe 17 is built in the drive shaft 16 of the air motor 14. The paint tube 17 is preferably formed of a transparent resin tube so that the degree of paint adhesion can be easily confirmed. The paint pipe 17 has a flow path 17a through which the paint supplied from a paint supply source (not shown) flows, and an injection port (discharge port) that communicates with the flow path 17a and is disposed in the internal space 23 of the first bell 20R. 17b. For this reason, the paint is sprayed into the internal space 23 from the spray port 17 b of the paint pipe 17.

  The first bell 20R has a function of atomizing and injecting paint by rotation. The first bell 20 </ b> R includes a cup-shaped bell cup 21 and a disk-shaped bell hub 22 provided at a central portion in the radial direction of the bell cup 21. The bell hub 22 is fastened and fixed to the bell cup 21 by a screw member (not shown). In the first bell 20R, an internal space 23 is defined by a bell cup 21 and a bell hub 22. A paint circulation hole 24 is formed between the bell cup 21 and the outer periphery of the bell hub 22.

  The surface 22a of the bell hub 22 is configured as a facing surface that faces the painted surface 51 of the vehicle body 50 that is a workpiece. The back surface 22 b of the bell hub 22 is configured as a curved surface capable of guiding the paint sprayed into the internal space 23 to the paint circulation hole 24 radially outward of the bell hub 22.

  The first bell 20R is connected to an external power source through an electric cable (not shown). For this reason, the first bell 20R is energized by the electric power supplied through the electric cable during the operation of the first coating machine 10R.

  The paint sprayed into the internal space 23 of the first bell 20R is atomized in a charged state in the internal space 23 by contacting the back surface 22b of the bell hub 22 in an energized state. Thereafter, the charged paint flows out through the paint circulation hole 24 between the bell cup 21 and the bell hub 22 and is atomized air which is blown out from the air outlet 12b of the air supply unit 12, so-called “shaping air”. By this, it is injected toward the painted surface 51 of the vehicle body 50 in a fixed pattern.

  At this time, there is a correlation between the rotation speed of the first bell 20R and the degree of granulation of the paint. That is, when the rotation speed of the first bell 20R increases, the degree of paint granulation becomes relatively high, and the degree of paint granulation where the rotation speed of the first bell 20R decreases decreases relatively.

  Further, as shown in FIG. 4, in the first coating machine 10R, the blowing direction S of the shaping air blown out from each air outlet 12b of the air supply unit 12 is opposite to the rotation direction D1 of the bell 20R (that is, The bell 20R is configured to be twisted backward (in the rotational direction). As a result, a swirling flow of shaping air is formed in the direction opposite to the rotation direction D1 of the first bell 20R. For this reason, the shaping air collides with the paint sprayed from the first bell 20R so as to intersect the scattering direction, and atomization of the paint can be promoted.

  As shown in FIG. 5, in the first coating machine 10R, the bell cup 21 of the bell 20R is screwed coaxially with the drive shaft 16, and the male screw 21a of the bell cup 21 is male to the male screw 21a. The screw 16a has a screwing structure that is tightened when the screw 16a is turned clockwise. The male screw 16a and the female screw 21a constituting such a screwing structure are also referred to as “right screw” or “normal screw”.

  In the case of this screwing structure, the drive shaft 16 is rotated clockwise relative to the bell cup 21 with the male screw 16a of the drive shaft 16 and the female screw 21a of the bell cup 21 engaged with each other. Accordingly, the drive shaft 16 is fastened to the bell cup 21 of the first bell 20R, and the first bell 20R is fastened and fixed to the drive shaft 16 by screwing.

  Further, in the first coating machine 10R, the first bell 20R is configured to rotate only in the clockwise direction that is a preset one direction. Specifically, the first bell 20 </ b> R is configured such that the rotational direction at the time of operation is always clockwise toward the right painted surface 51 </ b> R of the vehicle body 50. That is, the first bell 20 </ b> R is configured to rotate in the screwing direction of the screwing of the bell cup 21 and the drive shaft 16 by the rotational axial force transmitted from the drive shaft 16.

  According to this configuration, the rotation direction of the first bell 20 </ b> R coincides with the direction in which the screwing between the bell cup 21 and the drive shaft 16 increases. In order to realize this configuration, the direction of the plurality of blades 15a is set in the turbine 15 of the first coating machine 10R so that the first bell 20R rotates clockwise around the rotation axis A by air supply. ing.

  The second coating machine 10L is different from the first coating machine 10R in the screwing direction of the screwing between the drive shaft 16 and the second bell 20L and the rotation direction when the second bell 20L is operated. .

  As shown in FIG. 6, in the second coating machine 10 </ b> L, the bell cup 21 of the bell 20 </ b> L is screwed coaxially with the drive shaft 16, and the male screw of the drive shaft 16 with respect to the female screw 21 a of the bell cup 21. It has a threaded structure that tightens when 16a is turned counterclockwise, which is counterclockwise. The male screw 16a and the female screw 21a constituting such a screwing structure are also referred to as a “left screw” or a “reverse screw”.

  In the case of this screwing structure, the drive shaft 16 is rotated counterclockwise with respect to the bell cup 21 while the male screw 16a of the drive shaft 16 and the female screw 21a of the bell cup 21 are engaged with each other. Accordingly, the drive shaft 16 is fastened to the bell cup 21 of the second bell 20L, and the second bell 20L is fastened and fixed to the drive shaft 16 by screwing.

  As described above, the male screw 16a of the drive shaft 16 of the first coating machine 10R and the male screw 16a of the drive shaft 16 of the second coating machine 10L are in a reverse screw relationship (the direction in which the screw is formed). The opposite relationship). Similarly, the female screw 21a of the first bell 20R of the first coating machine 10R and the female screw 21a of the second bell 20L of the second coating machine 10L are in a reverse screw relationship.

  Further, in the second coating machine 10L, the second bell 20L is configured to rotate only counterclockwise that is a preset one direction. Specifically, the second bell 20L is configured such that the rotational direction during operation is always counterclockwise toward the left painted surface 51L of the vehicle body 50. That is, the second bell 20 </ b> L is configured to rotate in the screwing direction of the screwing of the bell cup 21 and the drive shaft 16 by the rotational axial force transmitted from the drive shaft 16.

  According to this configuration, the rotation direction of the second bell 20L coincides with the direction in which the screwing between the bell cup 21 and the drive shaft 16 is strengthened. In order to realize this configuration, the orientation of the plurality of blades 15a is set in the turbine 15 of the second coating machine 10L so that the second bell 20L rotates counterclockwise around the rotation axis A by the air supply. ing.

  Here, with reference to FIG. 7 and FIG. 8, a state in which the paint is applied to the right painted surface 51R and the left painted surface 51L of the vehicle body 50 by the vehicle body painting method using the painting apparatus 1 will be described.

  As shown in FIG. 7, when painting the right painted surface 51R of the vehicle body 50, the first bell 20R of the first painting machine 10R is arranged facing the right painted surface 51R. And the 1st painting machine 10R is operated and the 1st bell 20R is rotationally driven. At this time, the first bell 20R rotates in the rotation direction D1 clockwise around the rotation axis A toward the right coating surface 51R, and from the air outlet 12b (see FIG. 3) of the air supply unit 12. In cooperation with the shaping air that blows out, the charged paint is sprayed toward the right painted surface 51R while being granulated.

  The paint C sprayed from the first bell 20R spreads outward in the radial direction by the centrifugal force when the first bell 20R rotates. Further, when the paint C is viewed from the side of the right-side paint surface 51R, that is, when the first bell 20R is viewed from the drive shaft 16 side in the axial direction X, the paint C is indicated by an arrow S in FIG. According to the flow of the shaping air blown in the direction to be swept, it is scattered so as to flow backward in the rotation direction of the first bell 20R as a whole.

  Further, the first painting machine 10R, for example, according to the movement locus of the robot arm 31 (see FIG. 1) of the painting robot 30 taught in advance while the rotation of the first bell 20R is maintained, for example, a movement locus. Move on P1. At this time, the first coating machine 10R moves along the right-side painted surface 51R with a certain distance from the right-side painted surface 51R of the vehicle body 50, thereby applying the paint over the entire right-side painted surface 51R. Can be made.

  As shown in FIG. 8, when painting the left painted surface 51L of the vehicle body 50, the second bell 20L of the second coating machine 10L is arranged facing the left painted surface 51L. Then, the second painting machine 10L is operated to rotate the second bell 20L. At this time, the second bell 20L rotates in the rotation direction D2 that is counterclockwise toward the left paint surface 51L with the rotation axis A as the center of rotation, and from the air outlet 12b (see FIG. 3) of the air supply unit 12. In cooperation with the shaping air that is blown out, the charged paint is sprayed toward the left painted surface 51L while being granulated.

  The paint C sprayed from the second bell 20L spreads outward in the radial direction by the centrifugal force when the second bell 20L rotates. When the paint C is viewed from the side of the left painted surface 51L, that is, when the second bell 20L is viewed from the drive shaft 16 side in the axial direction X, the paint C is indicated by an arrow S in FIG. According to the flow of the shaping air blown in the direction to be swept, the air is scattered so as to flow backward in the rotation direction of the second bell 20L as a whole.

  Further, the second coating machine 10L, for example, according to the movement locus of the robot arm 31 (see FIG. 1) of the painting robot 30 taught in advance while the rotation of the second bell 20L is maintained, for example, a movement locus. Move on P2. At this time, the second coating machine 10L moves along the left-side painted surface 51L with a certain distance from the left-side painted surface 51L of the vehicle body 50, thereby applying the paint over the entire left-side painted surface 51L. Can be made.

  As described above, when the coating apparatus 1 is used, the rotation direction D1 in which the first bell 20R rotates toward the right painted surface 51R of the vehicle body 50 and the second bell 20L rotate toward the left painted surface 51L of the vehicle body 50. The rotating directions D2 are opposite to each other.

  Next, the effect of Embodiment 1 is demonstrated.

  According to the coating apparatus 1 and the vehicle body coating method described above, both the first bell 20R of the first coating machine 10R and the second bell 20L of the second coating machine 10L are directed in the same direction toward the target coating surface. Can be rotated. In this case, the flow direction of the paint sprayed from the bells 20R and 20L is substantially symmetrical between the right painted surface 51R and the left painted surface 51L of the vehicle body 50 (see FIGS. 7 and 8). A difference in coating quality is unlikely to occur between 51R and the left painted surface 51L.

  When both the first bell 20R and the second bell 20L rotate in the same direction toward the target painted surface, adjustment is made to eliminate the coating quality difference between the right painted surface 51R and the left painted surface 51L. Although the work is required, according to the coating apparatus 1 described above, such an adjustment work can be omitted or the time required for the adjustment work can be shortened. As a result, it is possible to shorten the time required for the painting work and increase the work efficiency.

  As the above-described adjustment work, typically, the work of individually adjusting the amount of shaping air blown out at each bell and the rotation speed of the bell, the ON state where paint injection is started at each bell, and the paint injection The operation | work etc. which adjust the switching timing with the OFF state where is stopped are mentioned.

  Further, according to the coating apparatus 1 described above, since both the first bell 20R and the second bell 20L rotate in the screwing direction of the screwing with the corresponding drive shaft 16, the bell 20R, It is possible to prevent the fastening between 20L and the corresponding drive shaft 16 from being released.

  Moreover, according to said coating apparatus 1, since both the 1st bell 20R and the 2nd bell 20L always rotate only to the preset one direction, the rotation direction of bell 20R, 20L is reversed in the middle. Such control is not required, and the structure of the apparatus can be simplified.

  Hereinafter, another embodiment related to the first embodiment will be described with reference to the drawings. In other embodiments, the same elements as those of the first embodiment are denoted by the same reference numerals, and the description of the same elements is omitted.

(Embodiment 2)
As shown in FIG. 9, the first painting machine 110 </ b> R of the painting apparatus 101 according to the second embodiment has the same configuration as the second painting machine 10 </ b> L of the painting apparatus 1 according to the first embodiment.
That is, the first coating machine 110R has a screwed structure that is tightened when the male screw 16a of the drive shaft 16 is rotated counterclockwise, which is counterclockwise, with respect to the female screw 21a of the bell cup 21. In the first coating machine 110R, the rotation direction of the first bell 20R is counterclockwise, and the first bell 20R is configured to rotate in the screwing direction in which the bell cup 21 and the drive shaft 16 are screwed together. Yes.

As shown in FIG. 10, the second coating machine 110L of the coating apparatus 101 according to the second embodiment has the same configuration as the first coating machine 10R of the coating apparatus 1 according to the first embodiment.
That is, the second coating machine 110L has a threaded structure that is tightened when the male screw 16a of the drive shaft 16 is rotated clockwise with respect to the female screw 21a of the bell cup 21. Further, in the second coating machine 110L, the second bell 20L is configured to rotate in the screwing direction of the screwing of the bell cup 21 and the drive shaft 16 in the clockwise direction when operated. Yes.

  Other configurations are the same as those of the first embodiment.

  Here, with reference to FIG. 11 and FIG. 12, a state when the paint is applied to the right painted surface 51R and the left painted surface 51L of the vehicle body 50 using the coating apparatus 101 will be described.

  As shown in FIG. 11, when painting the right painted surface 51R of the vehicle body 50, the first bell 20R of the first painting machine 110R rotates in the rotation direction D2 that is counterclockwise about the rotation axis A as the rotation center. At this time, when the paint sprayed from the first bell 20R is viewed from the side of the right painted surface 51R, the paint is scattered so as to flow backward in the rotation direction of the first bell 20R as a whole (FIG. 11 (see the shaping air blowing direction S in FIG. 11).

  On the other hand, as shown in FIG. 12, when the left painted surface 51L of the vehicle body 50 is painted, the second bell 20L of the second coating machine 110L is rotated clockwise D1 around the rotation axis A as the rotation center. Rotate. At this time, when the paint sprayed from the second bell 20L is viewed from the side of the left paint surface 51L, the paint scatters so as to flow backward in the rotational direction of the second bell 20L (see FIG. 12 (see the blowing direction S of the shaping air in No. 12).

According to the coating apparatus 101, as in the case of the coating apparatus 1 of the first embodiment, the flow direction of the paint sprayed from the bells 20R and 20L is approximately the same between the right painted surface 51R and the left painted surface 51L of the vehicle body 50. Because of the symmetry (see FIGS. 11 and 12), a difference in coating quality hardly occurs between the right painted surface 51R and the left painted surface 51L of the vehicle body 50.
In addition, the same effects as those of the first embodiment are obtained.

  The present invention is not limited to the above-described embodiment, and various applications and modifications can be considered without departing from the object of the present invention. For example, the following embodiments to which the present embodiment is applied can be implemented.

  In each of the above embodiments, the case where the female screw 21a of the first bell 20R and the female screw 21a of the second bell 20L are in a reverse screw relationship with each other has been illustrated, but the rotation of the first bell 20R and the second bell 20L The direction in which the female screw 21a is formed may be the same as long as at least the condition that the direction is reversed is satisfied.

  For example, in both the first coating machine 10R and the second coating machine 10L, a screwing structure that is tightened when the male screw 16a of the drive shaft 16 is rotated clockwise with respect to the female screw 21a of the bell cup 21 may be employed. it can. Further, in both the first coating machine 110R and the second coating machine 110L, it is possible to employ a screwing structure that tightens when the male screw 16a of the drive shaft 16 is rotated counterclockwise with respect to the female screw 21a of the bell cup 21. it can.

  In each of the above-described embodiments, the case where the bells 20R and 20L are screwed coaxially with the drive shaft 16 is exemplified. However, instead of this, one or more gears are provided between the bells 20R and 20L and the drive shaft 16. It is also possible to adopt a structure in which the bells 20R and 20L are connected to the drive shaft 16 via the gear.

  In each of the above embodiments, the case where the right side body 51R of the vehicle body 50 is painted by the first painting machine 10R and the left side body 51L is painted by the second coating machine 10L is exemplified. Another part of the vehicle body 50 can also be painted using 10L.

  As shown in FIG. 13, in addition to the right side body 51R described above, at least one of a hood right side region 52R, a roof right side region 53R, and a trunk hood right side region 54R of the vehicle body 50 is provided. An area | region can be made into the right side coating surface painted by the 1st coating machine 10R. In this case, the first painting machine 10R may paint only one area on the right side of the vehicle body, or may also paint a plurality of areas on the right side of the vehicle body.

  Similarly, in addition to the left side body 51L, at least one of the region 52L on the left side of the hood of the vehicle body 50, the region 53L on the left side of the roof, and the region 54L on the left side of the trunk hood It can be set as the left side painting surface painted with the coating machine 10L. In this case, the second coating machine 10L may paint only one area on the left side of the vehicle body, or may also paint a plurality of areas on the left side of the vehicle body.

  As shown in FIG. 13, for example, when the first painting machine 10 </ b> R of the first embodiment is used, the first bell 20 </ b> R rotates in the rotation direction D <b> 1 in the right regions 52 </ b> R, 53 </ b> R, 54 </ b> R of the vehicle body 50. Further, when the second coating machine 10L of the first embodiment is used, the second bell 20L rotates in the rotation direction D2 that is opposite to the rotation direction D1 in the regions 52L, 53L, and 54L on the left side of the vehicle body 50.

  In each of the above-described embodiments, the structure in which the shaping air blowing direction S is twisted in the direction opposite to the rotation direction of the bells 20R and 20L (rearward in the rotation direction) is illustrated. It is also possible to employ a structure in which the direction S is twisted in the same direction (forward in the rotational direction) with respect to the rotational direction of the bells 20R and 20L.

  In each of the above embodiments, the bell cup 21 of the bell 20R, 20L has the female screw 21a, and the case where the drive shaft 16 has the male screw 16a to be screwed into the female screw 21a is exemplified. The bell cup 21 may be provided with a male screw such as the male screw 16a and a female screw that is screwed into the male screw.

  In each of the above-described embodiments, a coating apparatus including two coating machines has been illustrated. However, the number of coating machines in the coating apparatus is not limited to two, and may be three or more as necessary. Good. For example, one or a plurality of coating machines may be provided for the right side painting surface 51R of the vehicle body 50, and one or a plurality of coating machines may be provided for the left side painting surface 51L of the vehicle body 50.

  In each of the above-described embodiments, the case where the air-driven air motor 14 is used for rotationally driving the two bells 20R and 20L has been illustrated, but an electric motor can be used instead.

  In each of the above embodiments, the case where the painting robot 30 is used as a driving unit for moving the two bells 20R and 20L is illustrated, but another driving unit may be used instead. As an example of another drive unit, a structure in which a bell is fixed to a power transmission chain used in combination with a sprocket via a bracket can be employed. In the case of this structure, the bell can be moved by power transmission during operation of the power transmission chain.

DESCRIPTION OF SYMBOLS 1,101 Rotary atomization coating apparatus 12b Air outlet 16 Drive shaft 20R 1st rotation atomization head (1st bell)
20L 2nd rotating atomizing head (2nd bell)
50 body 51 painted surface 51R, 52R, 53R, 54R right painted surface (right side body)
51L, 52L, 53L, 54L Left painted surface (left side body)
D1, D2 Rotation direction

Claims (5)

A rotary atomizing coating device for painting a car body,
A first rotating atomizing head disposed to face the right-hand painted surface of the vehicle body;
A second rotating atomizing head disposed opposite to the left painted surface in a position symmetrical to the right painted surface of the vehicle body;
With
The first rotary atomizing head and the second rotary atomizing head both atomize and inject the paint by rotation, and the first rotary atomizing head rotates toward the right-side paint surface of the vehicle body. A rotary atomizing coating apparatus configured such that a rotating direction and a rotating direction in which the second rotating atomizing head rotates toward the left painted surface of the vehicle body are opposite to each other.   An air outlet for blowing shaping air for atomization toward the paint sprayed from each of the first rotary atomizing head and the second rotary atomizing head, and the shaping air blown out from the air outlet The rotary atomizing coating apparatus according to claim 1, wherein the blowing direction is twisted in a direction opposite to a rotation direction of the rotary atomizing head.   The first rotary atomizing head and the second rotary atomizing head are both fastened and fixed to the drive shaft by being coaxially engaged with a drive shaft for rotationally driving the rotary atomizing head. The rotary atomizing coating apparatus according to claim 1, wherein the rotary atomizing head is configured to rotate in a screwing direction of the screwing.   The rotation according to any one of claims 1 to 3, wherein each of the first rotary atomizing head and the second rotary atomizing head is configured to rotate only in one preset direction. Atomization coating equipment. A vehicle body painting method for painting a vehicle body,
The first rotary atomizing head that atomizes and sprays the paint by rotation is arranged toward the right-side painted surface of the vehicle body,
A second rotating atomizing head that atomizes and sprays the paint by rotation is arranged toward the left painted surface in a position symmetrical to the right painted surface of the vehicle body,
The rotation direction in which the first rotating atomizing head rotates toward the right painted surface of the vehicle body and the rotating direction in which the second rotating atomizing head rotates toward the left painted surface of the vehicle body are opposite to each other. Thus, the vehicle body painting method of rotating the first rotating atomizing head and the second rotating atomizing head.

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