JP2020001020A - Bell type paint device - Google Patents

Abstract

To provide a bell type paint device which enables reduction of painting time and enables a user to take a posture suitable for painting work.SOLUTION: A bell type paint device 1 performs paint application of a vehicle body W that is a workpiece and includes: two paint head parts 10 which spray a paint P to the vehicle body W by rotation of a bell 20; and a base part 30 which holds the two paint head parts 10 in the same direction and is used to attach the two paint head parts 10 to an arm tip part 42 of a paint robot 40. A housing 11 of each of the two paint head parts 10 is configured to have a bending part 12 which bends in one direction between a base end part 11a connected to the base part 30 to a tip part 11b which houses the bell 20 and has a paint jet port 10a.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a bell type coating apparatus.

  2. Description of the Related Art Conventionally, in a middle coat and a top coat line for coating a vehicle body, a bell-type coating apparatus provided with a high-speed rotating bell (hereinafter, also simply referred to as “coating apparatus”) has been used. This coating apparatus is configured to granulate the paint by rotation of a bell and apply the paint to a painted surface of a vehicle body using air and static electricity.

  An example of such a coating device is disclosed in Patent Document 1 below. The coating apparatus disclosed in Patent Literature 1 includes a bell-shaped coating machine that is arranged to face left and right coating surfaces of a vehicle body, and a coating robot that holds the coating machine at an arm tip. According to this painting apparatus, the paint is applied to the left and right painted surfaces of the vehicle body by rotating the bell of the painting machine and moving the arm of the painting robot according to the movement trajectory taught in advance while spraying the paint. Can be.

JP-A-11-104544

  By the way, in this type of coating process, it is preferable to use a plurality of coating machines at the same time in order to improve the coating capacity and shorten the coating time required for coating the vehicle body and reduce the number of coating robots. For this purpose, a bell-type coating apparatus in which a plurality of coating machines are integrally mounted on the tip of the arm of the coating robot can be employed. According to this bell-type coating apparatus, it becomes possible to paint the painted surface of the vehicle body over a wide range with the paint sprayed simultaneously from a plurality of painting machines.

  Therefore, it is possible to adopt a structure in which a plurality of coating machines disclosed in Patent Document 1 are prepared and integrated. However, this coating machine has a linear housing structure in which the housing extends linearly from the arm tip side of the coating robot to a portion where the coating injection port is provided. For this reason, when changing the posture with respect to the vehicle body, it is necessary to largely move the entire robot arm of the painting robot, and there is a problem that it is difficult to take a posture suitable for painting work. And such a problem becomes more remarkable as the number of coating machines increases.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a bell-type coating apparatus that can shorten a coating time and easily take a posture suitable for a coating operation.

One embodiment of the present invention provides:
A bell-type coating device for coating workpieces,
A plurality of coating heads that spray paint toward the work by rotating the bell,
A base for holding the plurality of coating heads in the same direction and attaching to a coating robot arm tip,
With
Each of the housings of the plurality of coating heads has a bent portion that is bent in one direction from a base end connected to the base portion to a tip portion that houses the bell and has a paint injection port, Bell type coating equipment,
It is in.

  In the above bell-type coating apparatus, the plurality of coating heads are mounted in the same direction on the tip of the arm of the coating robot via the base. In each coating head, the paint is sprayed toward the work by the rotation of the bell. At this time, the paint trajectory of the work robot can be painted over a wide range by controlling the movement trajectory of the arm end of the painting robot while simultaneously spraying paint from the paint injection ports of the plurality of painting heads. It is possible to shorten the painting time required for painting the work by improving the work.

  Further, in the housing of each coating head portion, a base portion is connected to a base end portion, a bell is housed at a distal end portion, and a paint injection port is provided. The housing has a bend in one direction between a base end and a front end. That is, each coating head has a curved housing structure in which the housing extends from the base end to the tip end.

  Compared to a linear housing structure in which the housing extends linearly from the base end to the distal end, such a curved housing structure has a larger robot arm of the coating robot when changing the attitude of the coating head with respect to the workpiece. This has the advantage that it is possible to suppress the movement of the paint and to easily take a posture suitable for the painting work.

  As described above, according to the above aspect, it is possible to provide a bell-shaped coating apparatus that can shorten the coating time and easily take a posture suitable for a coating operation.

The figure which shows the whole structure of the bell type coating device of Embodiment 1. FIG. 2 is a perspective view of the vicinity of two coating heads in FIG. 1. The front view which looked at FIG. 2 from the A direction. The side view which looked at FIG. 2 from the B direction. Sectional drawing which shows typically the internal structure of the coating head part of FIG. FIG. 3 is a view for explaining an air flow at the time of spraying paint in FIG. 2. The side view corresponding to FIG. 4 about the coating head part of the bell type coating apparatus of Embodiment 2. The front view corresponding to FIG. 3 about the coating head part of the bell type coating apparatus of Embodiment 3.

  A preferred embodiment of the above aspect will be described.

  In the above bell-type coating apparatus, the housing has a bent portion as the bent portion provided between the base end portion and the distal end portion, and linearly extends from the base end portion to the bent portion. A first extending portion, and a second extending portion inclined from the bent portion with respect to the first extending portion at a predetermined inclination angle and linearly extending to the distal end portion. preferable.

  In this bell type coating apparatus, the housing of each coating head portion extends linearly from the base end to the first extending portion to the bent portion, bends at the bent portion, and then extends from the bent portion to the second extended portion. Extend straight to the tip. Here, the first extending portion is inclined at a predetermined inclination angle with respect to the second extending portion. According to such a bent shape, the shape of the housing can be simplified.

  In the above-mentioned bell-shaped coating apparatus, the first housing, which is one of the two coating heads adjacent to each other among the plurality of coating heads, and the second housing, which is the other housing, are separated by a facing space. Are preferably arranged in parallel.

  According to this bell type coating apparatus, by separating the first housing and the second housing with the facing space therebetween, the area where the coating is sprayed from the two coating heads can be expanded.

  In the above-mentioned bell-shaped coating apparatus, it is preferable that the first housing and the second housing are configured such that the opposed space is opened along the spray direction of the paint on the base end side.

  In this bell-type coating apparatus, shaping air is generally used to restrict the flow of the paint which is scattered in the rotational centrifugal direction of the bell from the paint injection port of each coating head. At this time, accompanying air flows along with the flow of shaping air around each housing. However, if the opposing space is closed along the paint spraying direction on the base end side of the housing, the entrained air flows into the opposing space. Flow is not easily formed. When the entrained air flows in a region around each housing other than the opposing spaces, the opposing spaces have a relatively low pressure, so that the paint sprayed from the paint injection port flows into the opposing spaces and stays and becomes dirty. This requires frequent cleaning operations.

  Therefore, the opposite space is opened along the spray direction of the paint on the base end side of the housing, and a flow passage for the accompanying air from the base end side to the front end side of the housing is formed in the opposite space. Is effective. Thereby, the flow of the accompanying air is easily formed also in the opposed space along the spray direction of the paint, and it is possible to prevent the opposed space from having a relatively low pressure. As a result, the frequency of the cleaning operation can be reduced, and it is possible to prevent a reduction in the operation rate and an increase in the number of maintenance steps due to stopping the production line of the work.

  Hereinafter, an embodiment of a bell-type 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, a first direction which is an axial direction of a bell constituting the coating apparatus is indicated by an arrow X, and a second direction which is a radial direction of the bell is indicated by an arrow Y. An arrow X1 indicates a direction in which the paint is sprayed, which is one direction of the first direction X.

(Embodiment 1)
As shown in FIG. 1, the coating apparatus 1 is a bell-type coating apparatus for coating a vehicle body W as a work to be coated. In the middle coat and top coat lines of the vehicle W, the vehicle W is carried into the painting booth B while being supported by a painting carriage (not shown), and is carried out of the painting booth B after the painting is completed.

  The coating apparatus 1 is a twin-head type coating apparatus. The coating apparatus 1 holds the two coating heads 10 and the two coating heads 10 in the same direction and attaches them to the arm tip 42 of the robot arm 41 of the coating robot 40. And a base portion 30 of

  Each of the two coating heads 10 is for atomizing the paint P by the rotation of the bell 20, and injecting the paint P toward the vehicle body W from the paint outlet 10a by the shaping air A1. For this purpose, the coating head unit 10 is connected to each of the paint supply pipe 2 for supplying the paint P and the air supply pipe 3 for supplying the shaping air A1.

  The painting robot 40 is configured as a multi-axis robot in which a plurality of drive shafts are provided on a robot arm 41. The coating robot 40 and the two coating heads 10 are both electrically connected to the control device 50.

  The control device 50 includes a known CPU, a memory, an input / output unit, and the like. The control device 50 includes a coating control unit 51 and a robot control unit 52.

  The coating control unit 51 has a function of controlling the two coating head units 10. According to the coating control unit 51, the start and stop of each coating head unit 10 are controlled, and the rotation speed of the bell 20 is adjusted when the coating head unit 10 is started.

  The robot controller 52 has a function of controlling the painting robot 40. According to the robot control section 52, the arm tip section 42 of the robot arm 41 is controlled to move according to the movement trajectory taught in advance, and the posture of each coating head section 10 is changed.

  Next, the detailed structures of the two coating heads 10 and the base 30 will be described with reference to FIGS.

  As shown in FIGS. 2 to 4, the base unit 30 is connected to two painting head units 10, and a bracket 31 for holding the two painting head units 10 integrally, and the bracket 31 is attached to the painting robot 40. And a shaft 32 for connection to the arm tip 42 of the arm.

  When one housing 11 of the two coating heads 10 is a first housing 11A and the other housing 11 is a second housing 11B, the first housing 11A and the second housing 11B are arranged in parallel with a facing space S therebetween. Have been.

  As shown in FIG. 3, the distance d1 between the first housing 11A and the second housing 11B is such that the bell 20 is accommodated from the base end 11a connected to the bracket 31 of the base 30, and the paint injection port is provided. The same is true for the first direction X up to the tip 11b having 10a. This interval d1 is smaller than the interval d2 between the two paint injection ports 10a.

  As shown in FIGS. 2 to 4, the facing space S is open in both the first direction X and the second direction Y (see FIG. 4). At this time, the first housing 11A and the second housing 11B are configured such that the opposing space S is opened along the spray direction X1 of the paint P on the base end 11a side. That is, an opening region T that opens upward in FIG. 3 is provided between the first housing 11A and the second housing 11B. The opening region T forms the rear end of the flow path through which the air flows in the facing space S along the ejection direction X1.

  Each of the first housing 11A and the second housing 11B has a curved (or “vented”) housing structure having a bent portion 12, a first extending portion 13, and a second extending portion. ing.

  The bent portion 12 is a bent portion bent in one direction between the base end portion 11a and the front end portion 11b. The first extending portion 13 is a portion extending linearly from the base end portion 11a to the bent portion 12. The second extending portion 14 is a portion that is inclined from the bent portion 12 with respect to the first extending portion 13 at a predetermined inclination angle and linearly extends to the distal end portion 11b. This inclination angle is defined as an angle θ between a virtual straight line M extending along the first extending portion 13 and a virtual straight line L extending along the second extending portion 14, as shown in FIG. .

  As shown in FIG. 5, an air motor 16 and a bell 20 are housed in a distal end portion 11 b of the housing 11. The housing 11 has an air supply passage 15 near the outer surface thereof, which communicates with the air supply pipe 3 (see FIG. 1). The air that has flowed in from the inlet 15a of the air supply path 15 is used as shaping air A1 that blows out from the air outlet 15b of the air supply path 15. A plurality of air outlets 15 b of the air supply path 15 are provided at equal intervals along the circumferential direction of the distal end 11 b of the housing 11. It should be noted that the bearing air used for the thrust air bearing and the radial air bearing of the air motor 16 and the driving air for driving the air motor 16 are supplied through a path different from the air supply path 15. It has become so.

  The air motor 16 is configured as an actuator that drives the bell 20 to rotate. The air motor 16 has a drive shaft 18 for driving the bell 20 to rotate. The bell cup 21 of the bell 20 is fixed to the drive shaft 18 of the air motor 16

  The air motor 16 is an air-driven motor, and its drive shaft 18 is integrated with the turbine 17. A plurality of blades 17a are provided on the outer peripheral surface of the turbine 17 at equal intervals in the circumferential direction. The drive shaft 18 rotates when air is supplied to the plurality of blades 17 a of the turbine 17. As a result, the bell 20 rotates integrally with the air motor 16 around the rotation shaft 18a, which is a virtual center portion of the drive shaft 18 in the radial direction.

  For details of the turbine 17 constituting the air motor 16, reference is made to, for example, the turbine 5 disclosed in Japanese Utility Model Laid-Open Publication No. S60-151555. Therefore, in this specification, further detailed description of the turbine 17 will be omitted by using this publication.

  A paint tube 19 is built in a drive shaft 18 of the air motor 16. The paint pipe 19 has a flow path 19a through which the paint P supplied from the paint supply pipe 2 (see FIG. 1) flows, and communicates with the internal space 23 of the bell 20 at an outlet 19b which is an outlet of the flow path 19a. are doing. Therefore, the paint P is ejected from the discharge port 19 b of the paint pipe 19 to the internal space 23.

  The bell 20 has a function of spraying the paint P by rotation. The bell 20 includes a cup-shaped bell cup 21 and a disk-shaped bell hub 22 provided at a radially central portion of the bell cup 21. In the bell 20, an inner space 23 is defined by a bell cup 21 and a bell hub 22. Further, a paint flow 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 facing the painted surface Wa of the vehicle body W. The rear surface 22 b of the bell hub 22 is configured as a curved surface that can guide the paint P injected into the internal space 23 to the paint circulation hole 24 on the radial outside of the bell hub 22.

  During operation of the coating apparatus 1, power is supplied to the bell 20 by electric power supplied from an external power supply through an electric cable (not shown).

  The paint P charged by energization of the bell 20 flows out of the inside space 23 of the bell 20 through the paint circulation hole 24 between the bell cup 21 and the bell hub 22. At this time, the paint P is sprayed toward the painted surface Wa of the vehicle body W in a fixed pattern by the electrostatic force and the shaping air A1 blown from the air outlet 15b of the air supply path 15.

  According to the first embodiment, the following operation and effect can be obtained.

  In the coating apparatus 1, the two coating heads 10 are attached to the arm tip 42 of the coating robot 40 via the base 30 in the same direction. In each coating head section 10, the paint P atomized by the rotation of the bell 20 is sprayed toward the vehicle body W by the shaping air A1. At this time, the paint surface Wa of the vehicle body W is painted over a wide range by controlling the movement trajectory of the arm tip portion 42 of the painting robot 40 while simultaneously spraying the paint P from the paint ejection ports 10a of the two painting head portions 10. As a result, the painting ability can be improved and the painting time required for painting the vehicle body W can be shortened. Further, with the improvement of the coating ability, the number of the coating robots 40 can be reduced as compared with the case where the number of the coating heads 10 is one, thereby reducing the length of the coating process, that is, the length of the coating booth. It becomes possible to suppress.

  Further, in the housing 11 of each coating head unit 10, the base unit 30 is connected to the base end 11a, the bell 20 is accommodated in the distal end 11b, and the paint injection port 10a is provided. The housing 11 has a bent portion 12 which is bent in one direction between a base end 11a and a tip 11b. That is, each coating head unit 10 has a curved housing structure in which the housing 11 bends and extends from the base end 11a to the front end 11b.

  Such a curved housing structure is different from the straight housing structure in which the housing 11 extends linearly from the base end portion 11a to the front end portion 11b when the posture of the coating head unit 10 with respect to the vehicle body W is changed. There is an advantage that the movement of the entire robot arm 41 of the robot 40 can be suppressed, and it is easy to take a posture suitable for painting work.

  Therefore, according to the first embodiment, it is possible to provide the coating apparatus 1 in which the coating time can be reduced and the posture suitable for the coating operation can be easily taken.

  According to the above-described coating apparatus 1, the housing 11 of each coating head portion 10 extends the first extending portion 13 linearly from the base end portion 11a to the bent portion 12 and bends at the bent portion 12, and then, The second extending portion 14 extends straight from the bent portion 12 to the distal end portion 11b. Here, the second extending portion 14 is inclined at a predetermined inclination angle θ with respect to the first extending portion 13. According to such a bent shape, the shape of the housing 11 can be simplified.

  According to the above-described coating apparatus 1, the first housing 11A and the second housing 11B are separated from each other with the opposed space S therebetween, so that the opposed space S is not formed between the first housing 11A and the second housing 11B. The area where the paint P is sprayed from the two paint heads 10 can be expanded as compared with the case.

  As shown in FIG. 6, in the above-described coating apparatus 1, the coating material P atomized by the rotational centrifugal force of the bell 20 of each coating head unit 10 is sprayed from the coating material injection port 10a. At this time, the flow of the paint P, which tends to scatter in the rotational centrifugal direction of the bell 20, is restricted by the shaping air A1. Further, accompanying air A2 flows around each housing 11 along with the flow of the shaping air A1.

  Here, if the opposing space S is closed along the spray direction X1 (see FIG. 4) of the paint P on the base end 11a side of the housing 11, the flow of the accompanying air A2 is less likely to be formed in the opposing space S. When the entrained air A2 flows in a region around each housing 11 except for the opposing space S, the opposing space S becomes relatively low in pressure, so that the paint P injected from the paint ejection port 10a flows into the opposing space S. And stays dirty. As a result, the cleaning operation of the coating apparatus 1 is frequently required.

  Therefore, in the first embodiment, an opening region T is provided on the base end portion 11a side of the housing 11 so that the opposing space S opens along the spray direction X1 of the paint P, and the opposing space S is utilized by using the opening region T. A passage is formed for the associated air A2 from the base end 11a side of the housing 11 to the tip end 11b side.

  Thereby, the flow of the accompanying air A2 is easily formed in the facing space S along the spray direction X1 of the paint P, and it is possible to prevent the facing space S from becoming relatively low in pressure. As a result, the frequency of the cleaning operation of the coating apparatus 1 can be suppressed, and it is possible to prevent a reduction in the operation rate and an increase in the number of maintenance steps due to stopping the production line of the vehicle body W.

(Embodiment 2)
As shown in FIG. 7, in the coating apparatus 101 of the second embodiment, the curved shape of the housing 111 of each coating head unit 10 is different from that of the coating apparatus 1 of the first embodiment.
Other configurations are the same as in the first embodiment.

  The housing 111 has a curved portion 112 as a bent portion that is bent in one direction from the base end portion 11a to the distal end portion 11b. That is, the housing 111 extends along an imaginary curved line N extending between the base end portion 11a and the distal end portion 11b, and forms a curved portion 112 by being curved as a whole. Further, the housing 111 has an opening region T such that the facing space S is opened along the paint P spraying direction X1 on the base end 11a side.

According to the coating apparatus 101 of the second embodiment, a housing 111 having a curved shape different from the housing 11 of the coating apparatus 1 of the first embodiment can be used.
In addition, the same operation and effect as those of the first embodiment are exerted.

(Embodiment 3)
As shown in FIG. 8, the coating apparatus 201 of the third embodiment is different from the coating apparatus 1 of the first embodiment in the relative arrangement of the two coating head units 10.
Other configurations are the same as in the first embodiment.

  In the coating device 201, the first housing 11A and the second housing 11B are arranged without a gap, and an opposing space S is formed between the first housing 11A and the second housing 11B as in the coating device 1 of the first embodiment. It has not been.

According to the coating apparatus 201 of the third embodiment, it is possible to prevent the paint P from flowing between the first housing 11A and the second housing 11B and becoming dirty.
In addition, the same operation and effect as those of the first embodiment are exerted.

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

  In the above-described first to third embodiments, the coating apparatuses 1, 101, and 201 each including the two coating head units 10 have been described as examples. However, the number of the coating head units 10 is not limited to this. It can be changed to more than one.

  In the above-described first and second embodiments, the case where the facing space S is provided with the opening region T in which the facing space S opens along the spray direction X1 of the paint P on the base end portion 11a side of the housings 11, 111 has been described. The opening region T can be omitted.

  In the above-described first to third embodiments, the coating apparatuses 1, 101, and 201 for coating the body W as a workpiece have been exemplified. However, the coating apparatuses 1, 101, and 201 may be used for coating a workpiece other than the body W as necessary. Can also be used.

1,101,201 Bell type coating apparatus 10 Painting head section 10a Paint injection port 11,111 Housing 11A First housing 11B Second housing 11a Base end section 11b Tip section 12 Bent section (bent section)
DESCRIPTION OF SYMBOLS 13 1st extending part 14 2nd extending part 20 Bell 30 Base part 40 Painting robot 42 Arm tip part 112 Curved part (bent part)
A1 Shaping air P Paint S Opposing space X1 Injection direction W Work θ Tilt angle

Claims (4)

A bell-type coating device for coating workpieces,
A plurality of coating heads that spray paint toward the work by rotating the bell,
A base for holding the plurality of coating heads in the same direction and attaching to a coating robot arm tip,
With
Each of the housings of the plurality of coating heads has a bent portion that is bent in one direction from a base end connected to the base portion to a tip portion that houses the bell and has a paint injection port, Bell type coating equipment.   The housing has a bent portion as the bent portion provided between the base end portion and the distal end portion, a first extending portion extending linearly from the base end portion to the bent portion, 2. The bell-shaped coating according to claim 1, further comprising: a second extending portion that is inclined from the bent portion with respect to the first extending portion at a predetermined inclination angle and linearly extends to the distal end portion. apparatus.   The first housing, which is one of the two coating heads adjacent to each other, and the second housing, which is the other of the plurality of coating heads, are arranged in parallel with a facing space therebetween. Item 3. A bell-shaped coating apparatus according to item 1 or 2. 4. The bell-type coating apparatus according to claim 3, wherein the first housing and the second housing are configured such that the opposed space is opened along the direction of spraying the paint on the base end side. 5.

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