JPH0675695B2 - Method and apparatus for coating and transporting plate-shaped parts for automobile bodies - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Field of Industrial Application The present invention is for transporting plate-like parts such as a bonnet, a trunk lid, a fender and a door to be attached to a vehicle body for painting. The present invention relates to a method and apparatus for coating and transporting plate-shaped parts for automobile bodies.

(2) Related Art Conventionally, a plate-shaped part coated separately from the vehicle body is known, for example, from JP-A-59-98773.

(3) Problem to be Solved by the Invention In the above-mentioned conventional one, since the plate-shaped component is painted separately from the vehicle body, reliable painting is difficult due to interference of the vehicle body when mounted on the vehicle body. Although the plate-shaped parts are surely painted, it is necessary to use an expensive painting robot for the painting.

The present invention has been made in view of the above circumstances, and a method and apparatus for coating and transporting plate-shaped parts for automobile bodies capable of coating plate-shaped parts while improving coating quality with a simple coating machine. The purpose is to provide.

B. Configuration of the Invention (1) Means for Solving the Problems The method of the present invention is for a vehicle body for transporting plate-like components such as a hood, a trunk lid, a fender, and a door, which are to be attached to the vehicle body, for painting. In a method for coating and transporting plate-shaped parts, a plurality of plate-shaped parts can be rotated about a common vertical axis that is off the plate-shaped parts, and can also be rotated about a horizontal axis that is orthogonal to the vertical axis. If possible, attach to the carrier at vertically spaced positions, and in a plurality of coating stages set at intervals in the transport direction of the carrier, the plate-shaped parts to be coated are rotated by rotation around the vertical axis. The plate-shaped component to be painted is placed in a substantially horizontal position by rotating it about the horizontal axis in a state in which it is arranged so as to avoid overlapping vertically. The first feature of the present invention is to apply the coating from the above and to arrange the plate-shaped parts in a substantially horizontal posture so as to vertically overlap each other by rotating about the vertical axis between the coating stages.

The second feature of the method of the present invention is to arrange the plate-shaped parts in a substantially horizontal posture so as to be vertically stacked in the drying process after the coating process is completed.

Furthermore, the third feature of the method of the present invention is that the outer surface of the plate-shaped component is arranged on the side opposite to the hot air outlet in the drying step.

In the device of the present invention, columns are erected on a transport carriage that can move along the transport direction, and plate-shaped components can be detachably supported by the tip at a plurality of positions spaced vertically in the column. However, the base end of the support arm extending in the direction orthogonal to the axis of the column is rotatably supported around the axis of the column and the axis orthogonal to the axis of the column.

(2) Action According to the first feature of the method of the present invention, the plate-shaped component to be coated is rotated about the horizontal axis at a position where the plate-shaped component to be coated does not vertically overlap and is in a substantially horizontal posture. It is possible to apply coating on both front and back sides from above, enabling painting with a simple painting operation of a simple painting machine, and it is possible to increase the coating thickness as the dripping limit of the paint rises. It is possible to improve the rust prevention performance by facilitating the coating of the peripheral portion of the plate-shaped component. Moreover, between the coating stages, the plate-shaped parts are vertically stacked in a substantially horizontal posture, so that the space required for moving the plate-shaped parts can be reduced.

According to the second feature of the method of the present invention, it becomes possible to reduce the area occupied by the drying oven by vertically stacking the plate-like components in a substantially horizontal posture.

According to the third feature of the method of the present invention, direct application of hot air to the outer surface of the plate-shaped component is avoided.

According to the device of the present invention, the position of the plate-like component in the horizontal plane can be freely changed by rotating the support arm around the axis of the support column, and the support arm is orthogonal to the axis of the support column. Since the plate-shaped component can be inverted by rotating it around, the method of the present invention can be appropriately carried out.

(3) Example Hereinafter, an example of the present invention will be described with reference to the drawings.
First, referring to FIG. 1 showing an embodiment of the present invention, in an assembly line of an automobile body, plate-like parts which are assembled to a body of a vehicle body (not shown) and constitute an automobile body, such as a bonnet 1, a trunk lid 2, and a pair of left and right sides. Front door 3a, 3
b, the pair of left and right rear doors 4a, 4b and the pair of left and right fenders 5a, 5b are sent to the painting process separately from the vehicle body.

At the final stage of the coating process, a topcoat booth 6 and a drying oven 7 connected to the rear end of the topcoat booth 6 are provided, and the plate-shaped parts 1, 2, 3a, 3b, 4a are provided. , 4b, 5a, 5b are conveyed in the upper coating booth 6 and the drying furnace 7.

In FIG. 2, each of the plate-shaped parts 1,2,3a, 3b, 4a, 4b, 5a, 5
The transport device for transporting b is a transport carriage 10 driven by a transport conveyor 9 (see FIG. 1) laid along the transport direction 8 in the topcoat booth 6 and the drying oven 7, and the transport carriage 10 A pair of columns 11a, 11b erected on the main frame 10a, and a plurality of, for example, four, columns vertically spaced from the columns 11a, 11b, and the axes of the columns 11a, 11b and the axes orthogonal to the axes. And a supporting arm 12 supported so as to be rotatable around. Moreover, the columns 11a and 11b are erected at the center portions in the width direction at the front end and the rear end of the main frame 8 along the transport direction 8, respectively.
Each of the four support arms 12 is supported on each of them.

Referring also to FIG. 3, the support arm 12 extends in a direction orthogonal to the axis of each of the columns 11a and 11b, and its base end 12a.
Are supported on the columns 11a and 11b. That is, each pillar 11a, 11b
At multiple locations, such as four, spaced apart in the axial direction of
A short cylindrical first support cylinder 13 is fitted so as to be prevented from moving in the axial direction and rotatable about the axis, and fixed to the outer surface of the support cylinder 13 along the radial direction of the support cylinder 13. The base ends 12a of the respective support arms 12 are fitted into the short cylindrical second support cylinder 14 rotatably around the axis. As a result, each support arm 12 is rotatable about the axis of each of the columns 11a and 11b, that is, the vertical axis, and at the same time, the horizontal axis, that is, each of the columns 11.
It is supported by the columns 11a and 11b so as to be rotatable around an axis orthogonal to the axes of a and 11b.

Between the support columns 11a, 11b and the first support cylinder 13, the first support cylinder 13
Is provided with a click mechanism 15 for rotating the support arm 12 by 90 degrees, and between the second support cylinder 14 and the support arm 12 for rotating the support arm 12 by 180 degrees. The click mechanism 16 is provided.

The click mechanism 15 is a column corresponding to the inner surface of the first support cylinder 13.
Four fitting recesses 17 provided on the outer surfaces of 11a and 11b, and the pillar 1
1a, 11b is provided with a pair of spheres 18 that can be fitted into the fitting recesses 17 on one diameter line, and a spring 19 that elastically urges the spheres 18 in the direction in which the fitting recesses 17 are fitted. . Each fitting recess 17
Are formed in a hemispherical shape on the outer surfaces of the columns 11a and 11b at positions spaced by 90 degrees in the circumferential direction. On the other hand, the first support cylinder 13 is provided with a pair of cylindrical housings 20 whose axes coincide with each other on a diameter line orthogonal to the axis of the second support cylinder 14, and the inside of which is communicated with the inner surface of the first support cylinder 13. The outer end of the housing 20 is closed by a cap 21, and a spring 19 is contracted between a receiving member 22 inserted into the housing 20 to support the sphere 18 from its back and the cap 21. Set up.

In such a click mechanism 15, the state in which each sphere 18 is fitted in the fitting recess 17 is elastically held, and each sphere 18 moves from the fitting recess 17 to the outer surface of the columns 11a, 11b so that 1 By rotating the support cylinder 13, the spherical body is inserted into the next fitting recess 17.
Until the 18 is fitted, that is, the first support cylinder 13 is a pillar only 90 degrees.
Rotate around the axes of 11a and 11b.

The click mechanism 16 includes a pair of fitting recesses 23 provided on the outer surface of the base end 12a of the support arm 12 corresponding to the inner surface of the second support cylinder 14, and the fitting recesses on the one diameter line of the base end 12a. 2
3, a pair of spheres 24 that can be fitted into 3, a pair of short cylindrical housings 25 that are fixed to the second support cylinder 14 with its diameter line aligned with the axis, and a housing for supporting each sphere 24 from the back. A receiving member (26) inserted into the housing (25), a cap (27) closing the outer end of the housing (25), and a spring (28) contracted between the receiving members (26).

In this click mechanism 16, the state in which the sphere 24 is fitted in the fitting recess 23 is elastically held, and the support arm 12 is rotated so that the sphere 24 rides on the outer surface of the base end 12a from the fitting recess 23. By driving, the support arm 12 is rotated by 180 degrees until the sphere 24 is fitted into the next fitting recess 23.

Therefore, the support arm 12 is formed around the axes of the columns 11a and 11b.
It can be rotated in a mode of 0 degree, and the columns 11a and 11b
It becomes possible to rotate in a mode of 180 degrees around the axis orthogonal to the axis of.

4, 5, and 6, each support arm 12 includes a bonnet 1 as a plate-shaped component, a trunk lid 2, a pair of left and right front doors 3a, 3b, and a pair of left and right rear doors 4a ,.
Attachment means 29 for detachably supporting one of the pair of left and right fenders 5a, 5b is provided at, for example, three locations. The attachment means 29 has an operating head portion 30a that engages with the support arm 12 at one end and an engagement portion 30b at the other end, and is a pivot shaft 30 that is rotatably supported by the support arm 12. A washer 31 for sandwiching a plate-shaped component between the engaging part 30b, a washer 32 for abutting the support arm 12, and a rotating shaft 30.
And a spring 33 that is contracted between the washers 31 and 32. The locking portion 30b is provided at the other end of the rotating shaft 30 so as to extend on both sides along one diameter line of the rotating shaft 30. On the other hand, a plate-shaped component, for example, the bonnet 1, is provided with an engagement hole 34 that extends linearly corresponding to the engagement portion 30b, and the engagement portion 30b can be inserted into the engagement hole 34. Moreover, the washer 31 is formed larger than the width of the engagement hole 34.

According to the mounting means 29, the washer 31 is brought into contact with the bonnet 1 to compress the spring 33 and the locking portion 30.
When b is inserted into the engagement hole 34 and the rotary shaft 30 is rotated by 90 degrees and the hand is released, the bonnet 1 is clamped by the spring force of the spring 33 between the washer 31 and the locking portion 30b, and the bonnet is held. 1
Can be detachably supported. Moreover, mounting means
The reference numeral 29 is configured to support the plate-like component in a substantially horizontal posture regardless of the rotation position of the support arm 12 which can be rotated 180 degrees by the click mechanism 16.

Referring again to FIG. 1, the transfer direction 8 is set in the topcoat booth 6.
1st, 2nd, 3rd and 4th coating stages S1, S2, S3, S4 are set respectively at four places spaced along the line between the 1st and 2nd coating stages S1, S2. A coating control panel 35 is arranged outside the corresponding top coating booth 6.

In FIG. 7, a pair of coating machines 36 capable of reciprocating along the transport direction 8 on both sides of the transport conveyor 9 are arranged on each of the stages S1 to S4.
A moving body 38 having a plurality of coating guns 37 capable of ejecting paint from above toward a plate-shaped component conveyed by a conveying device is configured to reciprocate along a guide rail 39 extending along the conveying direction 8. , These coating machines 36, 10
Only the plate-shaped parts protruding from both sides are painted.

Further, the drying oven 7 is formed with a width smaller than that of the top coating booth 6, and a blowing port (not shown) for blowing hot air upward is provided in the lower portion of the drying oven 7. It

Next, the operation of this embodiment will be described.
Four support arms 12 provided on the front end side pillar 11a in
Includes bonnet 1, front doors 3a, 3b and fender 5
a is detachably supported, and the trunk lid 2 and the rear doors 4a, 4 are attached to the four supporting arms 12 provided on the rear end side support 11b.
The b and the fender 5b are detachably supported. When the transport carriage 10 in a state of supporting the plate-shaped components 1, 2, 3a, 3b, 4a, 4b, 5a, 5b in this way reaches the first coating stage S1,
For example, in order to paint the back surface of the bonnet 1, the trunk lid 2 and the fenders 5a, 5b, the bonnet 1 and the fender 5a are projected on both sides of the carrier truck 10 so as to be offset by 180 degrees around the axis of the column 11a. Two
The support arm 12 is rotationally driven by, for example, a manual operation, so that the fender 5b and the fender 5b are located at positions projecting to both sides of the carrier 10 so as to be displaced by 180 degrees around the axis of the column 11a.
In the front doors 3a, 3b and the rear doors 4a, 4b, the support arms 12 that are vertically overlapped with each other in the widthwise central portion of the carrier 10 are rotated.

In this state, the back side of the bonnet 1, the trunk lid 2 and the fenders 5a, 5b is coated by reciprocating the coating machine 36 in the transport direction 8.

Next, at the second painting stage S2, both front doors 3a, 3b are rotated 180 degrees around the axis of the column 11a in order to coat the back surfaces of the front doors 3a, 3b and the rear doors 4a, 4b, as shown in FIG. Support arms so as to be displaced to both sides of the carrier truck 10 and to be positioned so that both rear doors 4a and 4b are displaced to 180 degrees around the axis of the column 11b so as to be protruded to both sides of the carrier truck 10.
12 is rotationally driven, and the bonnet 1 and the fender 5a and the trunk lid 2 and the fender 5b are respectively rotated so as to vertically overlap with each other in the widthwise central portion of the carrier 10.

In this state, the coating machine 36 is reciprocally driven along the transport direction 8 to coat the back surfaces of the front doors 3a, 3b and the rear doors 4a, 4b.

At the third painting stage S3, the bonnet 1, the trunk lid 2 and the surfaces of the fenders 5a, 5b are painted at the ninth stage.
As shown in the figure, the bonnet 1 and the fender 5a are pillars.
Positions where both sides of the carriage 10 project so as to be displaced by 180 degrees around the axis of 11a, and positions where the trunk lid 2 and the fender 5b are arranged so as to protrude at both sides of the carriage 11 so that they are displaced by 180 degrees around the axis of the pillar 11b. Thus, the support arm 12 is rotationally driven, and the front and rear doors 3a and 3b and the rear doors 4a and 4b are pivoted so that the support arm 12 is vertically overlapped at the widthwise central portion of the carriage 10. Moreover, each support arm 12 is arranged around the axis line orthogonal to the axis lines of the columns 11a, 11b so that the surfaces of the bonnet 1, the trunk lid 2, the front doors 3a, 3b, the rear doors 4a, 4b and the fenders 5a, 5b face upward. It is driven to rotate 180 degrees.

In this state, the coating machine 36 is reciprocally driven in the transport direction 8 to coat the surfaces of the bonnet 1, the trunk lid 2 and the fenders 5a, 5b.

Further, in the fourth painting stage S4, in order to paint the surfaces of the front doors 3a, 3b and the rear doors 4a, 4b, both front doors 3a, 3b are shifted by 180 degrees around the axis of the column 11b so that the carriage 10 is not moved. The support arm 12 is rotationally driven to a position projecting to both sides and a position projecting to both sides of the carrier 10 so that both rear doors 4a and 4b are displaced by 180 degrees around the axis of the column 11b, and the bonnet 1 and Fender 5a and boot lid 2
The fender 5b is rotated so as to vertically overlap with each other in the widthwise central portion of the carrier 10.

In this state, the coating machine 36 is reciprocally driven along the transport direction 8 to coat the surfaces of the front doors 3a, 3b and the rear doors 4a, 4b.

In this way, the bonnet 1, the trunk lid 2, the front doors 3a and 3b, the rear doors 4a and 4b, and the fenders 5a and 5b are coated on both front and back sides, and each stage S1 to S4 is performed.
At the time of coating, the surface to be coated is almost horizontal, and therefore, the construction of the coating machine 36 is simple without requiring the coating machine 36 to perform complicated operations. Moreover, since the coating can be performed in a substantially horizontal posture with the surface to be coated facing upward, the coating thickness can be increased as the dripping limit of the coating increases, and the peripheral edge of each plate-shaped component can be increased. The coating of the parts becomes easy, and the rust prevention performance can be improved.

After finishing the coating in the top coating booth 6 like this,
The carrier 10 enters the drying furnace 7, and at this time, the plate-shaped parts are arranged so as to be vertically stacked. That is, as shown in FIG. 10, the bonnet 1 and the front doors 3a, 3b on the side of the support column 11a.
Also, the fender 5a, the trunk lid 2, the rear doors 4a and 4b, and the fender 5b on the side of the column 11b are the carriages 1
They are arranged so as to vertically overlap each other in the central portion in the width direction of 0. This makes it possible to reduce the amount of protrusion of the carriage 10 to both sides, and accordingly the width of the drying oven 7 can be reduced. Moreover, when entering the drying oven 7, each plate-shaped component has its surface, that is, the outer surface, facing upward, and since the outer surface faces the side opposite to the hot air outlet, the hot air directly contacts the outer surface. It is possible to avoid hitting, and it is possible to prevent dust accompanying hot air from adhering to the outer surface.

By the way, each plate-shaped component in the drying oven 7, that is, the bonnet 1, the trunk lid 2, the front doors 3a and 3b, the rear door 4
Depending on the postures of a, 4b and fenders 5a, 5b, the dryness (PGD) and roughness (Ra) of the coating film after drying are affected, and the degree of influence is shown in FIG. In Fig. 11, the horizontal axis is the angle of the coated surface, and the image clarity (PGD)
Is indicated by *, and the roughness (Ra) is indicated by *, and the above-mentioned angle is 0 degree when the surface to be coated is in a horizontal posture. This 11th
As is clear from the figure, excellent sharpness (PGD) and roughness (Ra) can be obtained by drying while maintaining a substantially horizontal posture within a range of ± 30 degrees from the completely horizontal state.

FIG. 12 shows another embodiment of the present invention, in which parts corresponding to those in the above embodiment are designated by the same reference numerals.

In the topcoat booth 6, when moving between the coating stages S1 to S4, as in the drying oven 6 of the above-described embodiment, each plate-shaped component, that is, the bonnet 1, the trunk lid 2, the front doors 3a, 3b, and the rear doors. It is also possible to arrange the 4a, 4b and the fenders 5a, 5b so as to overlap each other. Then, the coating control panel 35, which is arranged outside the top coating booth 6 in the above-described embodiment, is replaced with the coating booth 6. It is possible to dispose between the coating stages inside, for example, between S1 and S2, and by doing so, the periphery of the top coating booth 6 can be cleaned.

C. Effect of the Invention As described above, according to the first feature of the method of the present invention, a plurality of plate-shaped components can be rotated about a common vertical axis at a position deviated from the plate-shaped components. Attached to the transport carriage at vertically spaced positions so as to be rotatable about a horizontal axis orthogonal to the vertical axis, and in a plurality of coating stages set at intervals in the transport direction of the transport carriage, the vertical axis is set around the vertical axis. By rotating the plate-shaped parts to be coated by the rotation around the horizontal axis in a state where they are arranged so as not to overlap with each other vertically, the plate-shaped parts to be coated are placed in a substantially horizontal posture and their front and back surfaces are Painting is applied to the surface from above, and between the coating stages, the plate-shaped parts are arranged so that they vertically lie on top of each other by the rotation around the vertical axis. It is possible to perform coating with, and it is possible to increase the coating thickness and improve rust prevention performance as the sagging limit of the coating rises, and move plate-shaped parts between coating stages. It is possible to reduce the space required for this.

Further, according to the second feature of the present invention, in the drying process after the completion of the coating process, the plate-shaped parts are arranged so as to vertically overlap each other in a substantially horizontal posture, so that the area occupied by the drying furnace can be reduced. Becomes

Further, according to the third feature of the present invention, in the drying step, the outer surface of the plate-shaped component is arranged on the half body side with respect to the hot air outlet, so it is possible to avoid applying hot air directly to the outer surface of the plate-shaped component,
It is possible to prevent dust accompanying hot air from adhering to the outer surface of the plate-shaped component.

According to the device of the present invention, columns are erected on a transport carriage that can move in the transport direction, and plate-shaped components are detachably supported by the tips at a plurality of positions vertically spaced from the columns. Since the base end of the supporting arm extending in a direction orthogonal to the axis of the supporting column while being enabled is rotatably supported about the axis of the supporting column and an axis orthogonal to the axis of the supporting column, the supporting arm is supported around the axis of the supporting column. By rotating, the position of the plate-shaped component in the horizontal plane can be freely changed, and the plate-shaped component can be inverted by rotating the support arm around the axis orthogonal to the axis of the support column. Therefore, the method of the present invention can be properly performed.

[Brief description of drawings]

1 to 11 show an embodiment of the present invention. FIG. 1 is a schematic plan view showing a coating process and a drying process, and FIG. 2 is a perspective view showing a configuration of a coating conveying device. 3 is an enlarged sectional view taken along line III-III in FIG. 2, and FIG. 4 is IV in FIG.
FIG. 5 is an enlarged view of the arrow, FIG. 5 is a sectional view taken along line VV in FIG. 4, FIG. 6 is a sectional view taken along line VI-VI in FIG. 4, and FIG. 7 is a schematic plan view showing a coating machine, FIG. 8 and FIG. FIG. 9 is a plan view of the transfer device showing the operating state in the topcoat booth, FIG. 10 is a plan view of the transfer device showing the condition in the drying oven, and FIG. 11 is the image clarity depending on the attitude in the drying oven. Graph showing the effect on roughness, No. 12
The figure is a schematic plan view of a main portion of another embodiment of the present invention. 1 ... Bonnet as a plate-like part, 2 ... Trunk lid as a plate-like part, 3a3b ... Front door as a plate-like part, 4a, 4b ... Rear door as a plate-like part, 5a, 5b ... …
Fenders as plate-like parts, 8 ... transport direction, 10 ...
Transport dolly, 11a, 11b ... Posts, 12 ... Support arms, S1-S4 ...
… Painting stage

Claims (4)

[Claims] 1. A hood to be attached to a vehicle body,
In a method of coating and transporting plate-shaped parts for an automobile body for transporting plate-shaped parts such as a trunk lid, a fender and a door, a plurality of plate-shaped parts are commonly used at positions separated from the plate-shaped parts. It is rotatable about a vertical axis and rotatable about a horizontal axis orthogonal to the vertical axis. It is attached to a carrier truck at vertically spaced positions and is set at a distance in the transport direction of the carrier truck. In a plurality of coating stages, the plate-shaped components to be coated by rotating about the vertical axis should be coated by rotating about the horizontal axis in a state where they are arranged so as not to overlap vertically. The plate-shaped parts are placed in a substantially horizontal position, and the front and back surfaces of the parts are coated from above, and between the coating stages, each plate-shaped part is placed in a substantially horizontal position due to the rotation around the vertical axis. Vehicle body board member coating method of conveyance car, characterized in that arranged so as to overlap vertically. 2. The coating of a plate-shaped part for an automobile body according to claim (1), characterized in that the plate-shaped parts are arranged in a substantially horizontal posture so as to be vertically overlapped with each other in a drying process after the completion of the coating process. Transport method. 3. The drying step, wherein the outer surface of the plate-shaped component is arranged on the side opposite to the hot air outlet.
A method for coating and transporting plate-shaped parts for automobile bodies according to the item. 4. A bonnet to be attached to a vehicle body,
In a coating and transporting apparatus for a plate-like component for an automobile body for transporting a plate-like component such as a trunk lid, a fender, a door, etc., a column is erected on a carrier truck that is movable along the transport direction. At a plurality of positions vertically spaced from each other, the base end of the support arm extending in a direction orthogonal to the axis of the column while allowing the plate-shaped component to be detachably supported by the tip is the axis of the column and the column of the column. A coating and conveying device for plate-like parts for automobile bodies, which is supported so as to be rotatable around an axis orthogonal to the axis.