JPH01293156A - Method and device for coating and transporting sheet parts for automobile body - Google Patents

Abstract

PURPOSE:To easily and efficiently coat sheet parts with a simpler coater by transporting the plural sheet parts almost horizontally supported and vertically spaced while rotating the parts on the vertical and horizontal axes. CONSTITUTION:A strut 13 is erected on a carrier 10 movable in the transport direction 8. The sheet parts such as the bonnet 1, trunk lid 2, and door and fender 5a and 5b freely attachable and detachable are supported at the plural vertically spaced positions of the strut 13, and the base end of a supporting arm 12 extending orthogonally to the axis of the strut 13 is pivoted on the strut 13. Since the supporting arm 12 is made rotatable on the axis of the strut 13 and on the axis orthogonal to the former axis, the position of the sheet part in the horizontal plane can be freely changed by rotating the arm 12 on the vertical axis. In addition, the sheet part is reversed by rotating the arm on the horizontal axis, and both sides of the part can be coated.

Description

Detailed Description of the Invention A1 Purpose of the Invention (1) Industrial Application Field The present invention is for transporting plate-shaped parts such as bonnets, trunk lids, fenders, and doors to be attached to a vehicle body for painting. The present invention relates to a coating conveyance method and apparatus for plate-shaped parts for automobile bodies.

(2) Prior Art Conventionally, a vehicle in which plate-shaped parts are painted separately from the vehicle body is known, for example, from Japanese Patent Laid-Open No. 59-98773.

(3) Problems to be Solved by the Invention In the above-mentioned conventional method, the plate-shaped parts are painted separately from the car body, and when they are attached to the car body, reliable painting is difficult due to interference from the car body. The company tried to reliably paint the plate-like parts, but it was necessary to use an expensive painting robot to do the painting.

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

B0 Structure of the Invention (1) Means for Solving the Problems The method of the present invention is a method of the present invention, in which a plurality of plate-shaped parts in a substantially horizontal posture are vertically spaced apart from each other from above while avoiding vertical overlapping. The first feature is that it can be transported while being rotatable around a vertical axis to enable painting, and also rotatable around a horizontal axis to enable painting on both the front and back sides. .

Furthermore, the method of the present invention includes setting a plurality of coating stages to be coated at intervals along the conveyance direction,
The second feature is that in each painting stage, the plate-like parts to be painted at that painting stage are arranged at different positions in the horizontal plane, and between the painting stages, the plate-like parts are arranged so as to overlap vertically. .

Further, the third feature of the method of the present invention is that in the drying step after the coating step, the plate-like components are arranged so as to be vertically overlapped.

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

In the device of the present invention, a support is erected on a transport vehicle that is movable along the transport direction, and a plate-shaped component can be detachably supported at the tip of the support at a plurality of positions spaced apart in the vertical direction of the support. However, the proximal end of the support arm extending in a direction perpendicular to the axis of the support column is rotatably supported around the axis of the support support and an axis perpendicular to the axis of the support support.

(2) Function According to the first feature of the method of the present invention, since the plate-shaped parts are painted from above in a substantially horizontal position, it is possible to paint them with a simple painting operation using a simple paint machine. As the sag limit becomes higher, the coating thickness can be increased, and furthermore, the peripheral edge of the plate-shaped component can be easily painted and the rust prevention performance can be improved.

According to a second feature of the method of the invention, it is possible to reduce the space required to move the plate-shaped part between each painting stage.

According to the third feature of the method of the present invention, it is possible to reduce the area occupied by the drying oven.

According to a fourth feature of the method of the invention, it is avoided that hot air hits the outer surface of the plate-shaped component directly.

According to the device of the present invention, by rotating the support arm around the vertical axis, the position of the plate-shaped component in the horizontal plane can be changed freely, and also by rotating the support arm around the horizontal axis. Since the plate-shaped component can be reversed by the method, the method of the present invention can be carried out appropriately.

(3) Examples Examples of the present invention will be explained below with reference to the drawings.
First, in FIG. 1 showing one embodiment of the present invention, plate-like parts that are assembled to a car body (not shown) and constitute the car body, such as a bonnet L, a trunk lid 2, and a pair of left and right parts, are assembled on an automobile body assembly line. front door 3a,
3b, the pair of left and right rear doors 4a, 4b and the pair of left and right fenders 5a, 5b are sent to a painting process separately from the vehicle body.

In the final stage of the painting process, a top coating booth 6 and a drying oven 7 connected to the rear end of the top coating booth 6 are provided, and each of the plate-shaped parts 1.2° 3a, 3b, 4a is , 4
b, 5a, and 5b are conveyed through the overcoating booth 6 and the drying oven 7.

In FIG. 2, each of the plate-shaped parts 1, 2.3a.

3b, 4a, 4b, 5a, and 5b is a conveyor driven by a conveyor 9 (see FIG. 1) installed along the conveyance direction 8 in the overcoat booth 6 and the drying oven 7. A dolly 10, a pair of columns 11a, llb erected on the main frame 10a of the carrier 10, and a plurality of columns 11a, llb, for example four, spaced apart in the vertical direction of these columns 11a, llb. It includes an axis and a support arm 12 rotatably supported around an axis perpendicular to the axis. Moreover, the pillars 11a, l
lb is erected at the center in the width direction at the front end and the rear end of the main frame 8 along the conveyance direction 8, and four support arms 12 are supported by each of the pillars 11a and llb, respectively.

Referring also to FIG. 3, the support arm 12 includes each pillar 11a,
It extends in a direction perpendicular to the axis of Ilb, and its base end 12a is supported by each support column 11a, 11b. That is, a short cylindrical first support cylinder 13 is fitted into a plurality of places, for example four places, spaced apart in the axial direction of each support column 11a, llb, so as to be prevented from moving in the axial direction and to be able to rotate around the axis. The base end 12a of each support arm 12 is rotatable around the axis of a short cylindrical second support cylinder 14 fixed to the outer surface of the support cylinder 13 along the radial direction of the support cylinder 13. mated. Thereby, each support arm 12 is rotatable around the axis of each support 11a, llb, that is, the vertical axis, and is also rotatable around the horizontal axis, that is, the axis of each support 11a, llb.
The support column 11a is rotatable around an axis perpendicular to the axis of the llb.

11b.

Between the struts 11a, llb and the first support cylinder 13, a first
A click mechanism 15 is provided between the second support tube 14 and the support arm 12 to allow the rotation of the support arm 12 to be rotated in 180 degree increments. A click mechanism 16 is provided for performing the operation.

The click mechanism 15 has four fitting recesses 17 provided on the outer surfaces of the struts 11a and ilb corresponding to the inner surface of the first support tube 13, and four fitting recesses 17 provided on the outer surfaces of the struts 1.1a and ilb on one diameter line. It includes a pair of spheres 18 that can be fitted together, and a spring 19 that resiliently biases the spheres 18 in a direction to fit them into the fitting recess 17. Each fitting recess 17 includes a support column 11a,
They are each formed in a hemispherical shape at positions spaced apart by 90 degrees in the circumferential direction on the outer surface of the llb. On the other hand, the first support tube 13 has a pair of cylindrical housings 20 whose axes coincide with one diameter line perpendicular to the axis of the second support tube 14 , the inside of which communicates with the inner surface of the first support tube 13 . The outer end of the housing 20 is closed with a cap 21.
A spring 19 is compressed between the member 22 and the cap 21, which is inserted into the housing 20 to support the sphere 18 from its back.

In such a click mechanism 15, each sphere 18 fits into the fitting recess 1.
7 is elastically held, and each sphere 18
is from the fitting recess 17 to the support column 11a.

By rotationally driving the first support tube 13 so as to ride on the outer surface of the support column 11b, the first support tube 13 is rotated by 90 degrees until the sphere 18 is fitted into the next Φ fitting recess 17.
Rotate around the axes of a and llb.

The click mechanism 16 has a pair of fitting recesses 23 provided on the outer surface of the base 12a of the support arm 12 corresponding to the inner surface of the second support cylinder 14, and a pair of fitting recesses 23 provided on the outer surface of the base 12a of the support arm 12, and a pair of fitting recesses 23 provided on the outer surface of the base end 12a, and a pair of fitting recesses 23 provided on the outer surface of the base end 12a, corresponding to the inner surface of the second support cylinder 14, and a pair of fitting recesses 23 provided on the outer surface of the base end 12a of the base end 12a. A pair of spheres 2 that can fit into the matching recesses 23
4, a pair of short cylindrical housings 25 fixed to the second support tube 14 with their axes aligned with one diameter line of the second support tube 14, and a receiver inserted into the housing 25 to support each sphere 24 from the back. 26, a cap 27 that closes the outer end of the housing 25, and a spring 28 that is compressed between the members 26.
Equipped with.

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

Therefore, the support arm 12 is rotatable by 90 degrees around the axes of the struts 11a and 11b, and
18 around the axis perpendicular to the axes of the struts 11a and llb.
It can be rotated in 0 degree increments.

In FIGS. 4, 5, and 6, each support arm 12 includes a bonnet 1, a trunk lid 2, and a pair of left and right front doors 3a, 3b.

For example, mounting means 29 are provided at three locations for detachably supporting one of the pair of left and right rear doors 4a, 4b and the pair of left and right fenders 5a, 5b.

This mounting means 29 has an operating head 30a that engages with the support arm 12 at one end, an engagement portion 30b at the other end, and a rotating shaft rotatably supported by the support arm 12. 30
and the engaging portion 30b, a washer 31 that holds the plate-shaped component between the two, a washer 32 that comes into contact with the support arm 12, and a spring 33 that surrounds the rotary wheel 30 and is compressed between the washers 31 and 32. Equipped with. The locking portion 30b is provided at the other end of the rotation shaft 30 so as to extend on both sides along one diameter line of the rotation shaft 30. On the other hand, in a plate-shaped component such as the bonnet 1, there is a retaining hole 34 extending in a straight line corresponding to the locking part 30b.
is provided, and the locking portion 30b can be inserted into the engagement hole 34. Moreover, the washer 31 is formed to be larger in width than the engagement hole 34.

According to means 29, such attachment is accomplished by, for example, bringing the washer 31 into contact with the bonnet 1, compressing the spring 33, inserting the locking portion 30b into the engagement hole 34, and rotating the rotation shaft 30 by 90 degrees. When the user releases the hand, the bonnet 1 is held between the washer 31 and the locking portion 30b by the spring force of the spring 33, and the bonnet 1 can be detachably supported. Furthermore, the mounting means 29 is configured to support the plate-shaped component in a substantially horizontal position no matter which rotational position the support arm 12, which can rotate through 180 degrees by the click mechanism 16, is in any rotational position.

Referring again to FIG. 1, in the topcoating booth 6 there are first, second, third and fourth coating stages Sl, S2, S3, . S4 is set respectively, and the first and second painting stages SL, 3
A coating control panel 3 is installed outside the topcoating booth 6 corresponding to the
5 is arranged.

In FIG. 7, each stage 31 to S4 is provided with a pair of coating machines 36 that are capable of reciprocating movement along the conveyance direction 8 on both sides of the conveyor 9. A moving body 38 having a plurality of paint guns 37 capable of spraying paint from above toward the plate-shaped parts being transported by the device is configured to reciprocate along a guide rail 39 extending along the transport direction 8, These coating machines 36 paint only the plate-shaped parts that protrude from the transport vehicle IO on both sides.

Further, the drying oven 7 is formed to have a smaller width than the topcoating booth 6, and an air outlet (not shown) for blowing hot air upward is provided at the bottom of the drying oven 7. Ru.

Next, the operation of this embodiment will be explained.
A bonnet 1, front doors 3a, 3b, and a fender 5a are removably supported by four support arms 12 provided on a pillar 11a on the front end side.
A trunk lid 2, rear doors 4a, 4b, and a fender 5b are removably supported by four support arms 12 provided on 1b. In this way, each plate-shaped part 1, 2, 3a
.

3b, 4a, 4b, 5a, and 5b reaches the second painting stage S2, for example, the bonnet 1, trunk lint 2, and fender
In order to paint the back surfaces of 5a and 5b, the bonnet 1 and fender 5a are positioned so that they protrude on both sides of the transport vehicle 100 so that they are offset by 180 degrees in the horizontal plane, and the trunk lid 2 and the fender 5b are positioned at 180 degrees in the horizontal plane. The support arms 12 are rotationally driven, for example, by manual manipulation, so that the front doors 3a, 3b and the rear doors 4a, 4b are in a position protruding from both sides of the carrier 10 so as to be shifted from the carrier 10.
Support arms 12, which overlap vertically at the center in the width direction, are rotated.

In this state, the coating machine 36 is reciprocated along the conveyance direction 8 to coat the back surfaces of the bonnet 1, trunk lid 2, and fenders 5a and 5b.

Next, in the second painting stage S2, the front doors 3a, 3b are painted.
and both front doors 3a, as shown in FIG. 8, in order to paint the back surfaces of the rear doors 4a, 4b.

3b protrudes from both sides of the transport vehicle 10 such that they are shifted by 180 degrees in the horizontal plane, and the rain rear door 4a.

The support arms 12 are rotated so that the support arms 4b are shifted by 180 degrees in the horizontal plane and protrude to both sides of the transport vehicle 10, and the bonnet 1 and fender 5a, as well as the trunk lid 2 and fender 5b, are attached to the transport vehicle. 10 so that they overlap vertically at the center in the width direction.

In this state, by reciprocating the sprayer 36 along the conveyance direction 8, the front doors 3a, 3b and the rear door 4a are
, 4b are painted.

In the third painting stage S3, in order to paint the surfaces of the bonnet 1, trunk lid 2, and fenders 5a and 5b, as shown in FIG.
The trunk lid 2 and the fender 5b are positioned so that they protrude on both sides of the transport vehicle 10 so that they are offset by 180 degrees in the horizontal plane, and the trunk lid 2 and the fender 5b are located in positions that project on both sides of the transport vehicle 1o so that they are offset by 180 degrees in the horizontal plane. , the support arm 12 is rotationally driven, and the front doors 3a, 3b and the rear door 4a are rotated.
, 4b are vertically overlapping support arms 12 that are rotated at the center in the width direction of the transport vehicle 10. As shown in FIG. Moreover, the hood 1, the trunk lid 2, the front door 3a13b, the rear doors 4a, 4b, and the fender 5a.

Each support arm 12 is attached to the support column 1 so that the surface of the support arm 5b faces upward.
It is rotated by 180 degrees around an axis perpendicular to the axes of Ia and Ilb.

In this state, the surfaces of the bonnet 1, trunk lid 2, and fenders 5a and 5b are painted by reciprocating the coating machine 36 along the conveyance direction 8.

Furthermore, in the fourth painting stage S4, the front doors 3a, 3b
And in order to paint the surfaces of the rear doors 4a, 4b, the positions where both front doors 3a, 3b protrude on both sides of the transport vehicle 10 so as to be shifted by 180 degrees in the horizontal plane, and the rain rear door 4a,
The support arms 12 are driven to rotate so that the support arms 4b are shifted by 180 degrees in the horizontal plane and protrude on both sides of the transport vehicle 10, and the bonnet 1 and fender 5a, as well as the trunk lid 2 and fender 5b, are attached to the transport vehicle. 10 so that they overlap vertically at the center in the width direction.

In this state, by reciprocating the sprayer 36 along the conveyance direction 8, the front doors 3a, 3b and the rear door 4a are
, 4b are painted.

In this way, the bonnet l, trunk lid 2, front doors 3a, 3b, rear doors 4a, 4b and fenders are
A top coat is applied to the front and back surfaces of 5a and 5b, but when painting in each stage 31 to S4, the surface to be coated is almost horizontal, so it is necessary to make the coating a36 perform complicated operations. There is no need for a coating machine 36, and the configuration of the coating machine 36 is simple.

Moreover, since the painting can be done in a nearly horizontal position with the surface to be painted facing upward, the coating thickness can be increased as the paint dripping limit increases, and the peripheral edges of each plate-like part can be This makes it easier to paint the parts and improves rust prevention performance.

After the painting is completed in the top coating booth 6,
The carrier 10 enters the drying oven 7, and at this time, the plate-shaped parts are arranged so as to be stacked one above the other. That is, as shown in FIG. 10, the bonnet 1, front doors 3a, 3b, and fender 5a are located on the pillar 11a side, and the pillar 11b is
On the sides, the trunk lint 2, rear doors 4a, 4b, and fender 5b are arranged so as to overlap each other vertically at the center in the width direction of the transport vehicle 10. As a result, transport vehicle 1
The amount by which the zero protrudes to both sides can be reduced, and accordingly, the width of the drying oven 7 can be reduced. Furthermore, when entering the drying oven 7, each plate-shaped component remains with its surface, that is, its outer surface facing upward, and the outer surface faces the opposite side from the hot air outlet, so that the hot air is directly directed to the outer surface. It is possible to prevent dust from being hit by the hot air from adhering to the outer surface.

By the way, depending on the posture of each plate-shaped component in the drying oven 7, namely the bonnet l-1, the trunk lid 2, the front doors 3a, 3b, the rear doors 4a, 4b, and the fenders 5a, 5b, the brightness of the paint film after drying may vary. This affects image density (PGD) and roughness (Ra), and the degree of influence is shown in FIG. In this Fig. 11, the angle of the surface to be painted is taken as the horizontal axis, and the image clarity (PGD) is not shown with ★ and the roughness (Ra) is not shown with ☆, but the above angle is the angle when the surface to be painted is in a horizontal position. 0
It is a degree. As is clear from this Figure 11,
Excellent image clarity (PGD) by drying while maintaining a nearly horizontal position within a range of ±30 degrees from a completely horizontal state
and roughness (Ra) can be obtained.

FIG. 12 shows another embodiment of the present invention, and parts corresponding to the above embodiments are given the same reference numerals.

Inside the topcoating booth 6, each painting stage 81 to S4
When mutually moving, the plate-like parts, namely the bonnet l, trunk lid 2, front doors 3a, 3b, rear doors 4a, 4b, and fenders 5a, 5b, are mutually moved, as in the drying oven 6 of the above embodiment. It is also possible to arrange them so that they overlap, and in that case, the coating control panel 35, which was disposed outside the top coating booth 6 in the above embodiment, can be replaced with the coating control panel 35 located outside the top coating booth 6.
It is possible to arrange the coating booth 6 between the coating stages 31 and 32, for example, between the coating stages 31 and 32, thereby making it possible to keep the area around the topcoating booth 6 tidy.

C1 Effects of the Invention As described above, according to the first feature of the method of the present invention, a plurality of plate-like parts in a substantially horizontal posture at vertically spaced positions are placed above them while avoiding vertical overlap. It can be rotated around the vertical axis to enable painting from the front and back, and can also be rotated around the horizontal axis to enable painting on both the front and back surfaces, so it can be transported using a simple coating machine. It becomes possible to perform painting with a simple painting operation, and as the paint dripping limit becomes higher, the coating film thickness can be increased and the rust prevention performance can be improved.

Further, according to the second feature of the present invention, a plurality of coating stages for applying the coating are set at positions spaced apart along the conveyance direction, and each coating stage has a plurality of coating stages to be coated at the coating stage. The plate-like parts are arranged at different positions in the horizontal plane, and the plate-like parts are arranged vertically overlapping each other between painting stages, so the space required to move the plate-like parts between each painting stage can be saved. It is possible to make it smaller.

According to the third feature of the method of the present invention, in the drying step after the coating step, the plate-like parts are arranged one above the other, so that the area occupied by the drying oven can be reduced.

Furthermore, according to the fourth feature of the method of the present invention, in the drying step, the outer surface of the plate-shaped component is placed on the opposite side from the hot air outlet, so that hot air is prevented from directly hitting the outer surface of the plate-shaped component, Dust accompanying hot air can be prevented from adhering to the outer surface of the plate-shaped component.

According to the device of the present invention, a support is erected on the transport vehicle that is movable along the transport direction, and at a plurality of positions spaced apart in the vertical direction of the support, the plate-like parts can be detachably supported at the tip. The proximal end of the support arm, which extends in a direction perpendicular to the axis of the support column, is rotatably supported around the axis of the support support and an axis perpendicular to the axis of the support support, so that the support arm can be rotated around the vertical axis. By moving, the position of the plate-shaped part in the horizontal plane can be freely changed, and by rotating the support arm around the horizontal axis, the plate-shaped part can be reversed. Therefore, the method of the present invention can be carried out appropriately.

[Brief explanation of the drawing]

1 to 11 show one embodiment of the present invention, in which FIG. 1 is a schematic plan view showing the coating process and drying process, FIG. 2 is a perspective view showing the configuration of the coating conveyance device, and FIG. Figure 3 is an enlarged sectional view taken along the line ■-■ in Figure 2; Figure 4 is an enlarged view taken along the arrow ■ in Figure 2; Figure 5 is a cross-sectional view taken along the line V-V in Figure 4; Figure 4 is a cross-sectional view taken along the line ■-■, Figure 7 is a schematic plan view showing the coating machine, Figures 8 and 9 are plan views of the conveying device showing the operating status inside the top coating booth, and Figure 10 is the drying oven. FIG. 11 is a graph showing the influence of the posture in the drying oven on the sharpness and roughness;
FIG. 12 is a schematic plan view of main parts of another embodiment of the present invention. 1... Bonnet as a plate-shaped part, 2... Trunk lid as a plate-shaped part, 3a, 3b... Front door as a plate-shaped part, 4a, 4b... Rear part as a plate-shaped part Doors, 5a, 5b...Fenders as plate-like parts 18...Transportation direction, 10...Transportation truck, 11a,
llb...Strut, 12...Support arm, Sl~S4...
・Painting stage

Claims (5)

[Claims] (1) In a method of transporting plate-shaped parts for automobile bodies for painting, such as plate-shaped parts such as bonnets, trunk lids, fenders, and doors, which are to be attached to the main body of the vehicle, Multiple plate-shaped parts in a nearly horizontal position can be rotated around the vertical axis to avoid vertical overlap and can be painted from above, and can also be painted on both the front and back sides. A method for transporting plate-shaped parts for an automobile body for coating, characterized in that the plate-shaped parts for an automobile body are transported while being rotatable around a horizontal axis as much as possible. (2) Multiple painting stages for painting are set at intervals along the conveyance direction, and each painting stage paints multiple plate-shaped parts that are to be painted at different locations in the horizontal plane. 2. The method for painting and transporting plate-like parts for automobile bodies according to item (1), characterized in that the plate-like parts are arranged so as to overlap each other vertically between the painting stages. (3) The method for painting and transporting plate-like parts for automobile bodies according to item (1), characterized in that in the drying process after the completion of the painting process, the plate-like parts are arranged so as to overlap one above the other. (4) The method for painting and conveying a plate-shaped part for an automobile body according to item (3), wherein in the drying step, the outer surface of the plate-shaped part is placed on the side opposite to the hot air outlet. (5) In a painting conveyance device for plate-like parts for automobile bodies, which transports plate-like parts such as bonnets, trunk lids, fenders, and doors to be attached to the body of a car body, the apparatus is movable along the conveyance direction. A support arm is erected on the transport vehicle, and at multiple positions spaced apart in the vertical direction of the support arm, the support arm extends in a direction perpendicular to the axis of the support support arm, which can detachably support a plate-shaped component at the tip. 1. A coating conveyance device for a plate-shaped part for an automobile body, characterized in that a base end is rotatably supported around an axis of a support and an axis perpendicular to the axis of the support.