JPWO2019142885A1 - Painting equipment - Google Patents

Abstract

A coating film is uniformly and efficiently formed on a desired portion of the object to be coated to shorten the production time. The painting apparatus (10) has a frame (22) attached to the tip of the painting robot (12), and a plurality of painting nozzles (24) are detachably provided on the frame (22). Each coating nozzle (24) is provided with first and second positioning pins (60, 62) protruding outside the body body (40), and the first positioning pin (60) is used as a frame (60). The second positioning pin (62) is fitted into the first pin hole (34) of the plate portion (32) fixed to the plate portion (22), and the second positioning pin (62) is provided on the side portion of the frame (22). By being fitted into the second pin hole (38) of 36b), the frame (22) is positioned at a predetermined position.

Description

The present invention relates to a coating device for coating an object to be coated such as an automobile body.

Conventionally, an air spray type coating device has been known as a means for coating an automobile body or the like. This coating apparatus has, for example, a spray nozzle for discharging a coating material and a coating nozzle as disclosed in Japanese Patent Application Laid-Open No. 2003-506210, and the coating material is spray nozzle from a pump connected via a pipe. The spray nozzle is supplied to the coating nozzle and discharged at high pressure, and the spray nozzle is moved by the robot arm to uniformly coat the surface of the object to be coated.

Further, the coating apparatus disclosed in Japanese Patent Application Laid-Open No. 2006-521206 includes a spray nozzle assembly including a nozzle body and an air cap, and mixes spray air supplied from an actuator with a liquid such as paint. The liquid is further atomized by the fan air supplied through the air cap to atomize the liquid.

The coating apparatus of JP-A-2003-506210 and JP-A-2006-521206 described above has a structure in which the coating material (liquid) discharged from the tip of the spray nozzle collides with air and atomizes. Highly accurate control of the air pressure of the air and the discharge pressure of the coating material is required.

However, in the process of mixing and atomizing the two by controlling the paint such as air and the coating material described above, the particles of the paint fly outward in the discharge direction, so that the paint is applied to the object to be coated. In addition to reducing efficiency, it is necessary to overspray over time in order to obtain a coating film in a required range in the object to be coated.

As a result, the paint such as the coating material is wasted more than necessary, which leads to an increase in the manufacturing cost, and the operating rate of the recovery equipment is increased in order to recover the surplus paint. As a result, power consumption will increase. In addition, it takes time to clean and maintain the paint adhering to the equipment such as the painting robot, which further increases the manufacturing cost.

A general object of the present invention is to provide a coating apparatus capable of uniformly and efficiently forming a coating film on a desired portion of an object to be coated and shortening the production time.

In order to achieve the above object, the present invention comprises a nozzle unit including a frame, a nozzle body fixed to the frame and provided with at least one discharge hole, and a plate provided on the frame to fix the nozzle body. It is a painting device that I had
The nozzle body is provided with a positioning portion for positioning on at least one of a plate and a frame.
Provided on at least one of the plate and the frame and provided with a positioned portion to which the positioning portion is fitted.
The positioning portion is characterized in that it varies and is fixed according to the arrangement of the nozzle body with respect to the frame and the plate.

According to the present invention, a positioning portion is provided on the nozzle body constituting the coating apparatus, and the positioning portion can be relatively positioned by fitting the positioning portion with respect to the positioned portion provided on at least one of the plate and the frame. And it can be fixed by changing it by the positioning part according to the arrangement of the nozzle body with respect to the plate.

Therefore, even if the arrangement of the nozzle body with respect to the frame and the plate is changed in the coating apparatus, the positioning portion and the positioned portion can easily and surely perform relative positioning. By arranging the body, it is possible to efficiently apply the coating amount to the required range with the optimum coating amount, shorten the production time, and form a uniform and stable coating film.

It is a schematic perspective view which shows the coating robot which attached the coating apparatus which concerns on embodiment of this invention. It is an external perspective view of the coating apparatus shown in FIG. It is an overall side view of the coating apparatus shown in FIG. It is sectional drawing along the IV-IV line of FIG. It is external perspective view of the coating nozzle which constitutes the coating apparatus of FIG. It is an exploded perspective view of the coating nozzle shown in FIG. It is an overall sectional view of the coating nozzle along the line VII-VII of FIG. It is a flow path perspective view which simplifies the paint flow path and the air flow path in the coating nozzle shown in FIG. 7. It is a partially omitted cross-sectional view along the IX-IX line of FIG. 9 is an enlarged cross-sectional view of the vicinity of the discharge port in FIG. FIG. 7 is an enlarged cross-sectional view showing the vicinity of the nozzle plate and the cover plate in FIG. 7. FIG. 12A is a schematic perspective view in which a plurality of painting nozzles are alternately arranged so as to be staggered with respect to the frame, and FIG. 12B is a schematic view in which the plurality of painting nozzles are offset and arranged in the longitudinal direction of the frame. It is a perspective view. It is an external perspective view of the coating apparatus which concerns on a modification. It is sectional drawing along the XIV-XIV line of FIG. It is sectional drawing along the XV-XV line of FIG.

As shown in FIG. 1, the coating device 10 is provided on a coating robot 12 installed in a coating line of a factory or the like, and ejects paint to an object (object to be coated) W such as a vehicle body, for example. As a result, a coating film is formed on the surface of the object W.

First, the above-mentioned painting robot 12 will be described with reference to FIG. The painting robot 12 is configured as, for example, an articulated robot, and has a base portion 14 fixed to a painting line (not shown), a first arm portion 16 extending from the base portion 14, and a tip of the first arm portion 16. The base portion 14 and the first arm portion 16, and the first arm portion 16 and the second arm portion 18 are connected to each other via joint portions 20a and 20b, respectively. It is movably connected. The joint portions 20a and 20b connect each portion (for example, the base portion 14 and the first arm portion 16) so as to be relatively rotatable. Further, a coating device 10 is detachably provided at the tip of the second arm portion 18.

Next, the painting device (nozzle unit) 10 mounted on the painting robot 12 described above will be described.

As shown in FIGS. 1 to 4, the painting apparatus 10 includes, for example, a frame 22 mounted on the second arm portion 18 of the painting robot 12, and a plurality of painting nozzles installed on the frame 22. A (nozzle body) 24 and a mixer 26 (see FIGS. 2 and 3) provided on the frame 22 and distributing paint to a plurality of painting nozzles 24 are included. The mixer 26 is connected to a paint supply device (not shown) via a pipe, and paint is supplied from the paint supply device. Here, a coating device 10 including 12 coating nozzles 24 will be described.

The frame 22 includes, for example, an annular base portion 28 formed from a metal material having a U-shaped cross section and connected to the painting robot 12, and a pair of support portions 30a and 30b erected from the base portion 28. A plate portion 32 provided between the support portions 30a and 30b is provided, and the base portion 28 is connected to the tip of the second arm portion 18 of the painting robot 12.

The support portions 30a and 30b are formed so as to extend substantially orthogonal to the base portion 28 and extend diagonally upward by a predetermined length, and one support portion 30a and the other support portion 30a and the other support portion are formed. A plate portion 32 is provided so as to connect the 30b (see FIG. 4). That is, the plate portion 32 is provided so as to extend in the width direction (arrow A direction) orthogonal to the extending direction of the support portions 30a and 30b.

The plate portion 32 is provided with a plurality of first pin holes (positioned portions) 34 into which the first positioning pins (positioning portions) 60 of the coating nozzle 24, which will be described later, are fitted, and the first pin holes 34 are provided. The 34s are formed so as to be evenly spaced from each other along the longitudinal direction (arrow B direction) of the plate portion 32, and are formed in pairs along the width direction (arrow A direction). The first pin holes 34 are formed in at least the same number as the number of the coating nozzles 24 to be mounted.

Further, the support portions 30a and 30b are provided with side plates (plates) 36a and 36b, respectively, on the side portions on the outer side in the width direction. The side plates 36a and 36b are provided along the support portions 30a and 30b so as to be orthogonal to the plate portion 32, and a plurality of side plates 36a and 36b to which the second positioning pin (positioning portion) 62 of the coating nozzle 24 described later is fitted are fitted. The second pin hole (positioned portion) 38 is formed. The second pin holes 38 are formed so as to be evenly spaced from each other along the longitudinal direction (arrow B direction) of the side plates 36a and 36b, and are provided so as to be paired with the first pin holes 34. That is, the second pin holes 38 are provided so as to have the same number as the first pin holes 34.

Then, as shown in FIG. 4, the frame 22 has a U-shaped cross section from the support portions 30a and 30b including the side plates 36a and 36b and the plate portion 32, and a plurality of coating nozzles 24 are arranged inside the support portions 30a and 30b in the width direction. It is arranged and fixed in parallel with each other. Specifically, as shown in FIG. 2, two coating nozzles 24 are arranged in parallel in the width direction of the frame 22 (arrow A direction), and in the longitudinal direction of the support portions 30a and 30b (arrow B direction). Six are provided along the line.

The arrangement and quantity of the coating nozzles 24 with respect to the frame 22 are not limited to the above-described configuration, and may be appropriately set to the arrangement and quantity as required.

The coating nozzle 24 is detachably provided with respect to the frame 22, and as shown in FIGS. 5 to 7, for example, a body body 40, an intermediate body 42 covering the end surface of the body body 40, and a cover plate. A nozzle plate 46 provided at the tip of the 44 is included.

The body body 40 side of the coating nozzle 24 will be described as the base end side (arrow C1 direction), and the nozzle plate 46 side will be described as the tip end side (arrow C2 direction). Further, the body body 40, the intermediate body 42, the cover plate 44, and the nozzle plate 46 described above function as a body constituting the painting nozzle 24.

The body body 40 is made of a block body having a rectangular cross section, and a pilot port 48 to which pilot air is supplied from a pressure fluid supply source (not shown) and a paint supply port 50 to which paint is supplied are opened on the side surface thereof. The pilot port 48 is formed so as to be on the proximal end side (direction of arrow C1), and the paint supply port 50 is formed on the distal end side (direction of arrow C2).

A tube 54 is connected to the pilot port 48 and the paint supply port 50 via a joint 52, respectively. Further, the pilot port 48 and the paint supply port 50 communicate with the first and second passages 56 and 58 (see FIG. 7) extending toward the inside of the body body 40, respectively.

Further, a first positioning pin 60 is provided on the base end surface of the body body 40 at a position on the outer peripheral side of the storage hole 66 described later, while the side surface is on the base end side (arrow C1 direction) with respect to the pilot port 48. A second positioning pin 62 is provided at such a position.

The first and second positioning pins 60 and 62 project by a predetermined height by being fitted into holes (not shown) on the base end surface and the side surface of the body body 40, and the first and second positioning pins 60 and 62 in the frame 22. It is inserted into and fitted into the pin holes 34 and 38, respectively. As a result, each coating nozzle 24 is positioned at a predetermined position on the frame 22 and fixed with a fixing bolt (not shown).

On the other hand, as shown in FIG. 7, a storage hole 66 for storing the switching valve 64 is formed inside the body body 40, and the storage hole 66 opens in the center of the base end surface of the body body 40 and at the same time. It is formed so as to extend along the axial direction (arrows C1 and C2 directions) and communicates with the communication hole 68 opened in the center on the tip side (arrow C2 direction). Further, the storage hole 66 is connected to and communicates with the pilot port 48 and the paint supply port 50 through the first and second communication passages 56 and 58, respectively.

Then, as shown in FIGS. 6 and 7, a switching valve 64 is inserted and stored inside the storage hole 66 from the base end side (arrow C1 direction) of the body body 40, and the switching valve 64 supplies pilot air. It has a valve body (not shown) that moves forward and backward in the axial direction (arrows C1 and C2 directions) under action, and the movement of the valve body causes the paint supply port 50 and the communication hole 68 to pass through the second communication passage 58. The communication state is switched.

Further, at the tip of the body body 40, a paint chamber 70 whose diameter is expanded outward in the radial direction of communication with the communication hole 68 is formed, and on the outer peripheral side of the paint chamber 70, an air supply port 80 described later is used. An air chamber 72 to which air is supplied is formed.

The paint chamber 70 has a circular cross section and is formed in the center of the body body 40 and is open so as to face the intermediate body 42. Then, when the paint supply port 50 and the communication hole 68 communicate with each other under the switching action of the switching valve 64, the paint is supplied to the paint chamber 70 through the second communication passage 58 and the communication hole 68. On the other hand, the air chamber 72 is formed in an annular shape so as to surround the paint chamber 70 without communicating with the paint chamber 70.

Furthermore, at the tip of the body body 40, a first connecting pin 74 is provided at a position on the outer peripheral side of the air chamber 72, and the first connecting pin 74 projects in the axial direction (arrow C2 direction) and is adjacent to the intermediate body. By being fitted into the pin holes 76 (see FIG. 7) of 42, the body body 40 and the intermediate body 42 are positioned coaxially with each other, and are integrally formed by four fastening bolts 78. Be connected.

The intermediate body 42 is formed in a rectangular cross section having substantially the same cross section as the body body 40, is in contact with the tip side (arrow C2 direction) of the body body 40 and is connected, and is for discharging paint on the side surface thereof. The air supply port 80 to which the air (fluid) of the above is supplied is open. A tube 54 is connected to the air supply port 80 via a joint 52. The air supply port 80 is formed on the side surface of the intermediate body 42 which is flush with the open side surface of the paint supply port 50 in the body body 40.

On the other hand, inside the intermediate body 42, a plurality of paint passages 82 that open in the center of the base end and extend to the tip side (arrow C2 direction) and in the vertical direction (arrow D direction) with respect to the paint passage 82. A pair of air passages 84a and 84b provided are formed.

For example, ten paint passages 82 are provided, and the base ends thereof are opened at the base end surface of the intermediate body 42 so as to face the paint chamber 70 of the body body 40 so as to communicate with each other and shown in FIG. Therefore, they are arranged so as to correspond to the shape of the paint chamber 70 and to be equally spaced along the circumferential direction.

Further, the plurality of paint passages 82 are formed with the same passage diameter, and are in the height direction (arrow D direction) in the intermediate body 42 from the base end arranged on the circumference toward the tip side (arrow C2 direction). Inclining toward the center so as to approach each other, and in the width direction (arrow E direction) orthogonal to the height direction, as shown in FIGS. 8 and 9, they face each other toward the tip side (arrow C2 direction). It extends so as to be evenly spaced.

Then, the plurality of paint passages 82 are opened at the tip of the intermediate body 42 at the center in the height direction, respectively, and as shown in FIG. 6, they are separated from each other at equal intervals and are in a straight line along the width direction (arrow E direction). Arranged in a shape.

That is, the paint passages 82 extend three-dimensionally from the base end of the intermediate body 42 toward the tip end side (direction of arrow C2) so that the passage lengths of the paint passages 82 are substantially the same.

The air passages 84a and 84b have a predetermined width in the width direction (arrow E direction) of the intermediate body 42, and are formed on the proximal end side (arrow C1 direction) of the intermediate body 42 as shown in FIGS. 6 to 8. It is composed of a first air passage portion 86 communicating with the air supply port 80 and a second air passage portion 88 extending from the tip of the first air passage portion 86 to the tip of the intermediate body 42. The first air passage portion 86 extends by a predetermined length along the axial direction of the intermediate body 42, opens at the base end of the intermediate body 42, and communicates with the air chamber 72 of the body body 40.

A seal ring 90 is sandwiched between the first air passage portion 86 on the inner peripheral side and the outer peripheral side, respectively, so that air leaks between the body main body 40 and the intermediate body 42. Is prevented.

The second air passage portion 88 extends so as to incline from the tip of the first air passage portion 86 toward the center in the height direction (arrow D direction), and extends from the center in the height direction at the tip of the intermediate body 42. The openings are located at equal intervals in the vertical direction (arrow D direction).

That is, at the tip of the intermediate body 42, a plurality of paint passages 82 are opened in the center in the height direction, and the tips of the air passages 84a and 84b are vertically aligned with the paint passage 82 in the width direction (arrow E direction). It has a long opening (see FIGS. 6 and 7). Specifically, one air passage 84a formed above and the other air passage 84b provided below are formed in a bifurcated shape symmetrical in the height direction (arrow D direction) of the intermediate body 42. ing.

Further, at the tip of the intermediate body 42, a second connecting pin 92 (see FIG. 6) is provided at a position further above the air passage 84a opened upward and further below the air passage 84b opened downward, respectively. .. The second connecting pin 92 protrudes from the tip in the axial direction (arrow C2 direction) and is fitted into the pin holes of the adjacent cover plates 44, so that the intermediate body 42 and the cover plate 44 are positioned at a predetermined position. It is positioned so as to be, and is integrally connected by six fastening bolts 96 described later.

As shown in FIGS. 6 to 10, the cover plate 44 is formed in a plate shape having a constant thickness, is formed in a substantially rectangular shape covering the tip of the intermediate body 42, and protrudes from the tip. It has a plurality of inner nozzle portions 98. The inner nozzle portion 98 is formed in the center of the cover plate 44 in the height direction (arrow D direction), is provided so as to be evenly spaced from each other along the width direction (arrow E direction), and is provided in the axial direction (arrow C2 direction). ) Protrudes by a predetermined height.

Further, the cover plate 44 is formed with a plurality of intermediate paint passage portions 100 penetrating in the axial direction at the center in the height direction, and the intermediate paint passage portions 100 are equidistant from each other along the width direction (arrow E direction). Separated, the base end side communicates with the paint passage 82 of the intermediate body 42, and the tip end side penetrates the inside of the inner nozzle portion 98 and opens at the tip end. The quantity of the intermediate paint passage portion 100 is set to be the same as the number of the paint passage 82 and the inner nozzle portion 98 of the intermediate body 42.

Further, a plurality of intermediate air passage portions 102 are formed on the cover plate 44 at positions facing the tips of the air passages 84a and 84b of the intermediate body 42, respectively. The intermediate air passage portion 102 penetrates along the axial direction (arrows C1 and C2 directions) and opens at the tip, and is formed so as to be separated from each other in the vertical direction (arrow D direction) with the intermediate paint passage portion 100 interposed therebetween. At the same time, they are formed at equal intervals from each other so as to be at the same interval as the intermediate coating passage portion 100 in the width direction (arrow E direction). That is, 10 intermediate air passage portions 102 are formed above and below each of the 10 inner nozzle portions 98 (intermediate paint passage portion 100).

Then, as shown in FIGS. 6 and 7, six fastening bolts 110 are inserted into the cover plate 44 through a plurality of bolt holes 104 provided above and below the intermediate air passage portion 102, respectively, and the intermediate body 42 The cover plate 44 is connected to the tip of the intermediate body 42 by being screwed into the screw hole 106 of the above.

Further, between the cover plate 44 and the intermediate body 42, a gasket 108 surrounding the air passages 84a and 84b (intermediate air passage portion 102) and the paint passage 82 (intermediate paint passage portion 100) is provided, and the air passage 84a is provided. , 84b is prevented from leaking air, and the paint is prevented from leaking from the paint passage 82.

As a result, in the cover plate 44, the intermediate air passage portion 102 communicates with the air passages 84a and 84b of the intermediate body 42, and the intermediate paint passage portion 100 communicates with the paint passage 82.

The nozzle plate 46 is formed in a plate shape having a rectangular cross section and a predetermined thickness, and the base end formed in a flat shape abuts on the tip end of the cover plate 44 and is on the base end side (arrow C1 direction) of the cover plate 44. ) Is connected by the fastening bolt 110 inserted from.

On the other hand, as shown in FIGS. 6, 7 and 11, a tip recess 112 recessed toward the proximal end side (direction of arrow C1) is formed in the center of the tip of the nozzle plate 46, and the tip recess 112 is formed. A paint ejection portion 114 extending in the same cross-sectional shape along the width direction (arrow E direction) and protruding from the tip in the axial direction (arrows C1 and C2 directions) is located at the center of the height direction (arrow D direction). It is formed.

As shown in FIGS. 5 to 9, a plurality of discharge ports 116 for discharging the paint mixed with air are provided in the paint discharge portion 114 in a straight line along the width direction (arrow E direction). The discharge port 116 is provided so as to be evenly spaced from each other along the width direction of the paint discharge portion 114, and has a discharge hole 118 opened in a circular cross section and a flat surface for guiding the paint from the discharge hole 118 to the outside. It has a unit 120. The number of discharge ports 116 is the same as that of the paint passage 82 and the intermediate paint passage portion 100, that is, ten.

The discharge hole 118 communicates with the tip of the discharge passage 122, which will be described later, so that the discharge hole 118 of the adjacent discharge port 116 is linear along the width direction (arrow E direction) as shown in FIG. It is formed.

The flat portion 120 is opened, for example, in a rectangular cross section having a large width dimension with respect to the height dimension, and expands in a fan shape in the cross section in the width direction of the nozzle plate 46 in the direction away from the discharge hole 118 (arrow C2 direction). It is formed so that the ends of the flat portions 120 that are exposed and adjacent to each other are connected to each other. That is, when viewed from the direction orthogonal to the width direction of the nozzle plate 46, the tips of the discharge ports 116 are formed in an uneven shape by a plurality of adjacent flat portions 120.

On the other hand, a plurality of discharge passages 122 penetrating in the axial direction are formed inside the nozzle plate 46, and the discharge passages 122 are formed in the center in the height direction, and the tips communicate with the discharge holes 118 and the base ends thereof. The side (direction of arrow C1) opens at the base end of the nozzle plate 46, and the inner nozzle portion 98 of the cover plate 44 is inserted.

The discharge passage 122 is formed at equal intervals along the width direction (arrow E direction) of the nozzle plate 46, similarly to the inner nozzle portion 98 of the discharge port 116 and the cover plate 44.

Further, the inner nozzle portion 98 is inserted from the base end to the vicinity of the center in the longitudinal direction on the discharge passage 122, and is shown between the outer peripheral surface of the inner nozzle portion 98 and the inner peripheral surface of the discharge passage 122. As shown in FIGS. 9 to 11, an annular passage 124 that is annular in the radial direction is formed. That is, the discharge passage 122 is formed with a passage diameter larger than the diameter of the inner nozzle portion 98.

Further, in the discharge passage 122, a confluence portion (mixing portion) 126 is formed at a position between the annular passage 124 and the discharge hole 118, and in the confluence portion 126, the paint supplied from the inner nozzle portion 98 and the above. The air supplied through the annular passage 124 is mixed at a predetermined mixing ratio.

Furthermore, in the nozzle plate 46, an air collecting chamber 128 opened on the base end side (direction of arrow C1) is formed in a substantially rectangular cross section, and the air collecting chamber 128 is all (20) in the cover plate 44. It is formed so as to face the intermediate air passage portion 102 of the above and communicates with the intermediate air passage portion 102.

Further, the air collecting chamber 128 communicates with the annular passage 124 of each discharge passage 122 on the tip side thereof. Then, the air supplied from the intermediate air passage portion 102 of the cover plate 44 is supplied to the annular passage 124 of each discharge passage 122 through the air collecting chamber 128. Then, the paint and air mixed in the confluence portion 126 become paint particles and are sent out from the confluence portion 126 to the discharge hole 118, and are discharged to the outside from the discharge hole 118.

The coating apparatus 10 according to the embodiment of the present invention is basically configured as described above, and next, a case where a plurality of coating nozzles 24 are attached to the frame 22 will be described.

First, with respect to the frame 22 shown in FIGS. 2 to 4, the base end of the coating nozzle 24 is on the plate portion 32 side, and the side surfaces are arranged on the side plates 36a and 36b side.

Then, the first positioning pin 60 provided on the painting nozzle 24 is fitted into the first pin hole 34 of the plate portion 32, and the second positioning pin 62 of the painting nozzle 24 arranged on one side in the width direction is fitted. By fitting it into the second pin hole 38 of the side plate 36a and fitting the second positioning pin 62 of the coating nozzle 24 arranged on the other side in the width direction into the second pin hole 38 of the side plate 36b. , Each coating nozzle 24 is positioned with respect to the frame 22.

Specifically, the plurality of coating nozzles 24 are positioned so as to be predetermined positions along the longitudinal direction (arrow B direction) and the width direction (arrow A direction) of the frame 22. Then, by screwing the fixing bolts (not shown) inserted through the plate portion 32 and the side plates 36a and 36b into the body body 40 of the painting nozzle 24, the painting nozzle 24 is designated with respect to the frame 22. It is fixed at each position. As a result, the coating device 10 is configured with a plurality of coating nozzles 24 continuously arranged and mounted along the longitudinal direction and the width direction of the frame 22.

Finally, the mounting work is completed by connecting the joint 52 and the tube 54 to the pilot port 48, the paint supply port 50, and the air supply port 80 of each coating nozzle 24, respectively.

Further, the coating device 10 is not limited to the case where the coating material is discharged from all the coating nozzles 24 at the same time. For example, as shown in FIG. 12A, by switching the switching valve 64 (see FIG. 7), the paint is ejected from the coating nozzle 24 every other time in the longitudinal direction (arrow B direction) of the frame 22 and one of them. The paint may be applied in a staggered manner by alternately ejecting the paint on one side in the width direction on the side plate 36a side and the other side in the width direction on the other side plate 36b side.

Further, paint is ejected from a plurality of coating nozzles 24 arranged on one side plate 36a side in the traveling direction of the coating apparatus 10, and a plurality of coatings arranged on the side plate 36b side rearward in the traveling direction. By discharging air instead of paint from the nozzle 24, the paint discharged and applied on the traveling direction side is suitably dried by the air discharged from another coating nozzle 24 on the rear side in the traveling direction. It becomes possible to make it.

Furthermore, the plurality of coating nozzles 24 are not limited to the case where they are continuously arranged so as to be adjacent to each other along the longitudinal direction and the width direction of the frame 22 as described above. For example, as in the coating apparatus 160 shown in FIG. 12B, a plurality of coating nozzles 24 continuously provided on one side in the width direction on one side plate 36a side and a width direction on the other side plate 36b side. On the other hand, a plurality of continuously provided coating nozzles 24 may be arranged so as to be offset in the longitudinal direction (arrow B direction) of the frame 22.

With such a configuration, when the paint is applied to the object W by the coating nozzles 24 arranged on one side in the width direction, the coating to the portion 162 between the adjacent coating nozzles 24 is insufficient. However, it is possible to reliably paint the portion between the painting nozzles 24 on one side in the width direction by the painting nozzles 24 arranged offset in the longitudinal direction on the other side in the width direction. It will be possible.

That is, by appropriately changing the arrangement of the plurality of painting nozzles 24 with respect to the frame 22 according to the size and shape of the object W to be painted by the painting devices 10 and 160 including the plurality of painting nozzles 24, the painting pattern, and the like. It is possible to easily and freely deal with the shape, coating pattern, and the like.

Next, the operation and the effect of the coating device 10 in which a plurality of coating nozzles 24 are mounted on the frame 22 as described above will be described.

The painting robot 12 on which the painting device 10 shown in FIG. 1 is mounted operates the first and second arm portions 16 and 18 under the control action of a controller (not shown) to operate the painting nozzle 24 of the painting device 10. It is arranged at a predetermined position (for example, a position facing the painted surface of the object W).

After that, paint is supplied to the mixer 26 from a paint supply device (not shown) through a pipe, and is distributed and supplied from the mixer 26 to each coating nozzle 24 through a plurality of tubes 54, and at the same time, from an air supply source (not shown) through a pipe. Air is supplied to the pilot port 48 and the air supply port 80 of the coating nozzle 24.

In each coating nozzle 24, the pilot air supplied to the pilot port 48 is supplied to the switching valve 64 through the first continuous passage 56, so that the valve body moves in the axial direction and the valve is opened. Then, the paint supplied from the paint supply port 50 into the body body 40 through the second connecting passage 58 is supplied from the communication hole 68 to the paint chamber 70 as the valve body opens.

Then, the paint supplied to the paint chamber 70 is supplied to the tip side (arrow C2 direction) through the ten paint passages 82, respectively. At this time, since the passage diameters of the paint passages 82 are formed to be the same and the lengths are also formed to be substantially the same, the amount of paint flowing through each paint passage 82 to the tip side is substantially the same and supplied. The time it takes for the paint to reach the tip side is also approximately the same.

The paint gradually gathers at the height center of the intermediate body 42 by flowing toward the tip side (arrow C2 direction) along each paint passage 82, and is guided so as to be evenly spaced from each other in the width direction. After being located at the center of height at the tip of the intermediate body 42 and at equal intervals in the width direction, the intermediate body 42 is supplied to each intermediate paint passage portion 100 of the cover plate 44. Since 10 intermediate paint passages 100 are provided in the same number as the paint passages 82, the amount of paint supplied from the paint passages 82 does not change, and the same amount of paint is supplied to the intermediate paint passages 100. Will be supplied.

Then, the paint that has flowed to the tip of the inner nozzle portion 98 through the intermediate paint passage portion 100 is led out to the confluence portion 126 of the discharge passage 122 in the nozzle plate 46.

On the other hand, the air supplied to the air supply port 80 is supplied to the air passages 84a and 84b and the air chamber 72, and then the first and second air passage portions of the bifurcated air passages 84a and 84b are formed. By flowing to 86 and 88, respectively, the flow is divided and flows from the top and bottom toward the tip side (arrow C2 direction), respectively. Further, as shown in FIG. 7, the air passages 84a and 84b are formed so as to have a symmetrical shape in the height direction (arrow D direction) of the coating nozzle 24. Therefore, the supply amount of air supplied to the tip side of the coating nozzle 24 and the arrival time to the tip are substantially the same, and the diverted air is directed toward the tip side (arrow C2 direction) toward the center of height. It will flow so as to gradually approach.

Then, the air that has flowed to the tip of the intermediate body 42 flows to each of the plurality of intermediate air passage portions 102 in the cover plate 44, and is further divided and then supplied to the air collecting chamber 128 of the nozzle plate 46. It flows from the air collecting chamber 128 to the plurality of discharge passages 122, flows to the annular passages 124 outside the inner nozzle portion 98, and then is supplied to the confluence portion 126, respectively. As a result, in the merging portion 126, the paint and air discharged from the inner nozzle portion 98 are mixed at a predetermined ratio.

The paint particles in which the air and the paint are mixed at the confluence portion 126 are sent out to the tip side along the discharge passage 122, and are discharged to the outside from the discharge hole 118 through the flat portion 120. The coating device 10 described above evenly ejects the supplied paint from the plurality of coating nozzles 24 to the object W. Then, the coating robot 12 moves the coating apparatus 10 while discharging the coating particles from the coating apparatus 10, so that a coating film having a desired thickness is formed on the object W.

On the other hand, by stopping the supply of pilot air to the switching valve 64, the valve body of the switching valve 64 moves to the initial position, the valve is closed, and the communication between the paint supply port 50 and the paint passage 82 is cut off. , The discharge of paint from the discharge port 116 is stopped. In this case, by continuing to supply air to the air supply port 80, only air is discharged to the outside from the discharge port 116. Therefore, for example, the air is applied to the coating film applied to the surface of the object W. It is also possible to accelerate the drying of the coating film by discharging.

As described above, in the present embodiment, the first and second pin holes 34 and 38 are formed in the plate portion 32 and the side plates 36a and 36b of the frame 22 constituting the coating device 10, respectively, for a plurality of coatings. When the nozzle 24 is mounted on the frame 22, the first and second positioning pins 60 and 62 provided on the body body 40 are fitted into the first and second pin holes 34 and 38, respectively. Can be easily positioned and fixed in place with.

As a result, in the coating apparatus 10, the arrangement of the coating nozzle 24 with respect to the frame 22 can be easily changed and positioned. Therefore, for example, by arranging the coating nozzle 24 according to the size and shape of the object W to which the paint is applied, it is possible to efficiently apply only the optimum coating amount to the required range in a short time, and the manufacturing time. It is possible to shorten the time required, and it is possible to form a uniform and stable coating film.

Further, the coating nozzle 24 includes a merging portion 126 for merging and mixing the paint and air supplied to the inside of the nozzle plate 46 on the tip side. Therefore, by previously merging the paint and air inside the coating nozzle 24, stable paint particles can be generated, and the discharged paint can be made uniform, and at the same time, the discharged paint can be made uniform. The flow rate and air pressure can be easily controlled, and stable coating (straightness, uniformity) can be applied.

Further, by providing the switching valve 64 for each of the coating nozzles 24 constituting the coating apparatus 10, it is possible to easily change the quantity and arrangement of the coating nozzles 24, and to perform wiring and the like efficiently. Therefore, even when a plurality of coating nozzles 24 are provided, the coating apparatus 10 can be made compact.

On the other hand, the coating apparatus 10 is not limited to a configuration in which a plurality of coating nozzles 24 are held by the plate portion 32 and the side plates 36a and 36b as described above, and for example, the coating shown in FIGS. 13 to 15 is shown. Like the device 170, the plurality of coating nozzles 24 may be held by a single center plate 172 fixed to the center in the width direction of the plate portion 32 instead of the side plates 36a and 36b.

The frame 22 constituting the coating device 170 includes, for example, a plate portion 32 provided between the support portions 30a and 30b and a center plate 172 erected at the center in the width direction of the plate portion 32, and the center thereof. The plate 172 is provided so as to be orthogonal to the plate portion 32 and is fixed by a fixing bolt (not shown). As a result, the center plate 172 is provided so as to project by a predetermined height with respect to the plate portion 32, and the center plate 172 and the plate portion 32 are provided so as to have a substantially T-shaped cross section.

The center plate 172 is formed to have substantially the same length as the plate portion 32 along the longitudinal direction of the frame 22 (direction of arrow B), and is in the width direction with respect to one end and the other end along the longitudinal direction. It has a pair of mounting recesses 174a and 174b recessed in the (thickness direction, arrow A direction).

The mounting recesses 174a and 174b are formed so as to be recessed toward the center of the width with respect to both side surfaces in the width direction so that the side portions of the plurality of coating nozzles 24 can be stored and the coating nozzles 24. A plurality of second pin holes 176 into which the second positioning pin 62 is fitted are formed. The second pin hole 176 is formed so as to be evenly spaced from each other along the longitudinal direction (arrow B direction) of the center plate 172, and is provided so as to be paired with the first pin hole 34 of the plate portion 32. Be done.

Then, as shown in FIGS. 14 and 15, the frame 22 has an L-shaped cross section from one side surface in the width direction of the center plate 172 and the plate portion 32, and from the other side surface in the width direction of the center plate 172 and the plate portion 32, respectively. A plurality of coating nozzles 24 are arranged in parallel in the width direction so as to be in contact with both of them, and the first and second positioning pins 60 are arranged in the first and second pin holes 34 and 176, respectively. When the 62 is fitted, it is positioned and fixed at a predetermined position.

With such a configuration, the pair of side plates 36a and 36b used in the coating devices 10 and 160 according to the first embodiment becomes unnecessary, and the tubes 54 connected to the plurality of coating nozzles 24 are eliminated. It is possible to facilitate the handling and maintenance of the.

It should be noted that the coating apparatus according to the present invention is not limited to the above-described embodiment, and of course, various configurations can be adopted without departing from the gist of the present invention.

10, 160, 170 ... Painting device 12 ... Painting robot 22 ... Frame 24 ... Painting nozzles 30a, 30b ... Support part 32 ... Plate part 34 ... First pin hole 36a, 36b ... Side plate 38, 176 ... Second pin hole 40 ... Body body 42 ... Intermediate body 44 ... Cover plate 46 ... Nozzle plate 60 ... First positioning pin 62 ... Second positioning pin 64 ... Switching valve 126 ... Confluence 172 ... Center plate W ... Object

Claims (3)

A frame (22), a nozzle body (24) fixed to the frame (22) and provided with at least one discharge hole, and a plate provided on the frame (22) to fix the nozzle body (24) ( A coating apparatus (10, 160, 170) having a nozzle unit composed of 36a, 36b).
The nozzle body (24) is provided with a positioning portion (62) for positioning on at least one of the plate (36a, 36b) and the frame (22).
A positioned portion (38) provided on at least one of the plate (36a, 36b) and the frame (22) and to which the positioning portion (62) is fitted is provided.
The coating apparatus, characterized in that the positioning portion (62) is varied and fixed according to the arrangement of the nozzle body (24) with respect to the frame (22) and the plates (36a, 36b). In the coating apparatus according to claim 1,
The coating apparatus, wherein the nozzle body (24) is provided with a mixing unit (126) that mixes the supplied paint and the fluid. In the coating apparatus according to claim 1 or 2.
A painting apparatus characterized in that at least one or more nozzle bodies (24) are provided, and each of the nozzle bodies (24) is provided with a switching valve (64) capable of switching a paint supply state.

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