JPH0779982B2 - Painting method and its equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a coating method and an apparatus therefor, and more specifically, for example, when coating an outer plate portion of an automobile body,
Painting in a state where the vehicle length direction of the vehicle body is oriented substantially orthogonal to the painting direction, the paint injection means is oriented substantially at right angles to the outer plate portion, and the distance to the outer plate portion is kept constant. TECHNICAL FIELD The present invention relates to a coating method and an apparatus thereof that can reduce the coating time as much as possible to easily and efficiently improve the entire coating process.

[Prior Art] In recent years, automobiles as products have been efficiently mass-produced by a highly automated line production process in the automobile industry. Therefore, in order to meet the demand of this mass production, an assembling device for assembling the respective parts or a conveying device for sequentially conveying the parts to a predetermined working position is used,
It goes without saying that the coating device for coating the car body of an automobile is also automated.

In this case, various methods are adopted to automatically paint the vehicle body. For example, a vehicle body for an automobile is stopped at a coating position, a coating device equipped with a plurality of coating guns is displaced with respect to the vehicle body to coat the vehicle body,
There is one in which a plurality of coating guns mounted on a fixed type coating device are used to coat the moving vehicle body while transporting the vehicle body via a carrier device.

By the way, when carrying out the above-mentioned various coating methods, the vehicle body is arranged with its vehicle length direction oriented in the coating direction. Then, both sides of the vehicle body are painted through a side painting mechanism that mounts a plurality of painting guns, and the upper part of the vehicle body is painted by an upper painting mechanism that provides a plurality of painting guns that are directed vertically downward. Is going.

However, since the vehicle length direction of the vehicle body is oriented in the painting direction, it is necessary to move the vehicle body or each coating mechanism by at least a distance corresponding to the vehicle length of the vehicle body. Therefore, conventionally, it has been pointed out that a considerable amount of time is required for painting the vehicle body, and as a result, the efficiency of the entire painting process cannot be achieved. Further, as described above, since the coating direction is directed in the vehicle length direction of the vehicle body, the disadvantage that the coating line becomes long is exposed.

Moreover, the plurality of coating guns mounted on the upper coating mechanism are positioned so as to be oriented vertically downward. in this case,
There is a configuration in which the coating gun is moved up and down to maintain a constant distance between the hood of the vehicle body, the roof and the trunk cover and the respective coating guns. It is not possible to apply a coating, that is, the front surface of the bonnet and the lower surface of the trunk cover are curved or bent with respect to the flat surface of the bonnet and the trunk cover, and the coating surface moves up and down on such a coating surface. It is absolutely impossible to apply a uniform coating with a gun.

[Problems to be Solved by the Invention] The present invention has been made in order to overcome the above-mentioned inconvenience, and the longitudinal direction of an object to be coated such as an automobile body is oriented in a direction substantially orthogonal to the coating direction. By orienting the paint injection means at a substantially right angle to the coating surface of the object to be coated and at a predetermined distance from each other, the coating surface can be coated uniformly and with high quality. Moreover, it is sufficient to relatively move the object to be coated and the paint injection means by a distance corresponding to the lateral direction of the object to be coated. Therefore, the coating work can be performed in the shortest possible time. It is an object of the present invention to provide a coating method and an apparatus therefor capable of easily achieving the efficiency improvement of the whole process.

[Means for Solving Problems] In order to achieve the above-mentioned object, the present invention is directed to a longitudinal direction of an object to be coated which is conveyed along a coating line in a direction substantially orthogonal to the conveying direction. Next, while moving the object to be coated and the paint injection means relatively in the transport direction, the paint injection means is oriented substantially at right angles to the coating surface of the object to be coated and separated from the coating surface by a predetermined distance. It is characterized in that the paint is injected while being moved so that the object to be coated is painted.

Furthermore, the present invention is a coating apparatus for coating an object to be coated conveyed along a coating line in the lateral direction thereof, and coating both sides and upper part in the longitudinal direction of the object to be coated. And a movable body that can move back and forth in the lateral direction of the object to be coated, and a mechanism that extends substantially in the longitudinal direction of the object and can be rotated and / or moved up and down by the movable body. An arm to be mounted and at least one coating gun provided on the arm include a plurality of coating guns that can advance and retract and / or swing relative to the arm.

[Embodiment] Next, the coating method according to the present invention will be described in detail below with reference to preferred embodiments in relation to an apparatus for carrying out the method, with reference to the accompanying drawings.

1 and 2, reference numeral 10 indicates a coating device for carrying out the coating method according to the present invention. The coating device 10 is a vehicle body transport mechanism 12 provided along a coating line.
Rails 14a, 14b provided on both sides of the rail and a first painting mechanism movable along the first rail portions 14a, 14b.
16a, 16b, second rail portions 18a, 18b provided apart from the respective first rail portions 14a, 14b by a predetermined distance, and second coating capable of freely moving back and forth along the second rail portions 18a, 18b. mechanism
Including 20 and. In this case, the vehicle body 22 is arranged with its vehicle length direction oriented substantially perpendicular to the transport direction (direction of arrow C), and the front portion 24 and the rear portion 26 of the vehicle body 22 are connected to the first coating mechanism 16a, 16b is applied, and both sides 28, 30 and the upper part 32 of the vehicle body 22 are applied by the second applying mechanism 20.

The traveling means for traveling the first coating mechanism 16a, 16b and the second coating mechanism 20 along the first rail portion 14a, 14b and the second rail portion 18a, 18b is basically the same. That is, the rail brackets 34 that form the rail portions 14a, 14b, 18a, and 18b have the respective rail portions 14a, 14b, 18a, and 1b.
8b extends from one end to the other end. As shown in FIG. 2, a rack is installed on the vertical outer side of the rail bracket 34.
36 are arranged so as to extend in the longitudinal direction of the rail bracket 34.

On the other hand, a plate member 40 is provided at the lower end of the casings 38a to 38d that constitute the outside of the first painting mechanism 16a, 16b and the second painting mechanism 20.
The side plate fixedly attached to and attached to one side of the lower surface of the plate body 40.
A traveling motor 44 is attached to 42a. A pinion 46 is rotatably attached to the tip of the rotary shaft 44a of the traveling motor 44, and the pinion 46 is mounted on the rail bracket 34 to the rack 36.
Mesh with. Further, the side plate 42a fixed to the other side of the lower surface of the plate body 40 and the wheel parts 48a, 48b that engage with the rail bracket 34 and rotate are attached to the side plate 42a.

The casings 38a, 38b constituting the first coating mechanism 16a, 16b are respectively equipped with coating guns 50a, 50b oriented horizontally, and in this case, the coating guns 50a, 50b are mounted on the casings 38a, 38b. It is preferable to be configured to be displaceable in the vertical direction (arrows A and D directions) and the horizontal direction (arrows E and F directions) under the action of an actuator (not shown) provided.

Next, the casings 38c and 38d that form the second coating mechanism 20.
A ball screw 52 extending in the vertical direction is rotatably supported therein, and the upper end of the ball screw 52 has casings 38c, 3
It is connected to the drive shaft of a lifting motor 54 mounted on the upper surface of 8d. Four guide rods 56a around the ball screw 52
To 56d are erected in parallel. Here, a support plate 58 is screwed onto the ball screw 52, and the support plate 58 is configured to move up and down by rotating the ball screw 52 under the driving action of the lifting motor 54. The guide rods 56a to 56d are inserted into the support plate 58.

A turning motor 62 is mounted on the upper surface of the support plate 58 through a holder 60.
Is fixed, and a gear 64 is attached to the rotary shaft 62a of the turning motor 62.
Is pivoted. The holding body 60 holds a bearing member 66, and a swivel shaft 68 is axially supported by the bearing member 66.
A gear 70 is pivotally supported on one end of the. At that time, the gear 70 meshes with the gear 64 that is axially supported by the turning motor 62. The other end of the pivot shaft 68 projects outward from the casings 38c and 38d, and both ends of the arm 72 are pivotally attached to the respective ends.

Therefore, the coating guns 74a to 74i are supported on the arm 72.
In this case, the coating guns 74a to 74i have the same structure, and the coating gun 74a will be described in detail below.

That is, one end of a mounting plate 76a that extends vertically downward close to the casing 38c side is fixed to the arm 72, and a lifting cylinder 78a is mounted on the mounting plate 76a. As shown in FIG. 3, the piston rod 80a extending vertically downward from the lifting cylinder 78a is engaged with a locking portion 84a provided at the end of the bracket 82a. Further, a swing cylinder 86a is disposed in the bracket 82a, and a piston rod 88a extending vertically downward from the swing cylinder 86a projects outward from the lower end portion of the bracket 82a by a predetermined length. In this case, one end of a rod 90a is fixed to the lower end of the bracket 82a in parallel with the piston rod 88a, and the swing plate 92a is swingably engaged with the other end of the rod 90a. A coating gun 74a is mounted on the tip of the swing plate 92a, and the end of the piston rod 88a is engaged with a connecting portion 94a provided so as to project outward from the side of the swing plate 92a. .

The coating gun 74a is basically constructed as described above, the other coating guns 74b to 74i are constructed in the same manner, and the same components are designated by the same reference numerals with b to i. Detailed description thereof will be omitted.

The painting guns 74e and 74f are for painting the uppermost portion of the roof 32b of the vehicle body 22, and do not have to be configured to be movable up and down with respect to the arm 72. Therefore, the swing cylinder 86
It will be readily appreciated that the e, 86f can be constructed by mounting them directly to the mounting plates 76e, 76f.

The apparatus for carrying out the coating method according to the present invention is basically constructed as described above. Next, its operation and effect will be explained.

As shown in FIG. 1, the first coating mechanisms 16a and 16b are arranged in advance on one end side of the first rail portions 14a and 14b, and the second coating mechanism 20 is attached to one end of the second rail portions 18a and 18b. The coating guns 74a to 74i are positioned and positioned in a direction substantially orthogonal to the left side portion 28 of the vehicle body 22 for an automobile while being arranged on the side of the vehicle.

Therefore, the vehicle body 22 is conveyed via the vehicle body conveyance mechanism 12 with the vehicle width direction oriented in the conveyance direction (direction of arrow C), and is positioned between the first rail portions 14a and 14b constituting the coating device 10. When carrying out, the transfer work is stopped. Further, the paint is sprayed from the respective coating guns 50a, 50b constituting the first coating mechanisms 16a, 16b, and the first coating mechanisms 16a, 16b are moved in the direction opposite to the arrow C along the first rail portions 14a, 14b. Move in the direction.

That is, the casing forming the first coating mechanism 16a, 16b
At the lower ends of 38a and 38b, casings 38c and 3 shown in FIG.
Similar to 8d, traveling means is provided via the plate 40. For this reason, the rotation shaft 44 is driven by the drive motor 44.
The pinion 46 pivotally attached to a is rotated, and the casings 38a and 38b are run along the rail bracket 34 in the direction opposite to the arrow C via the rack 36 that meshes with the pinion 46.
As a result, the coating guns 50a and 50b move in the direction opposite to the arrow C while spraying the coating material, so that the front portion 24 and the rear portion 26 of the vehicle body 22 are coated.

After the painting of the 24 and the rear portion 26 is completed, the vehicle body 22 is conveyed in the direction of the arrow C via the vehicle body conveying mechanism 12, and the conveyance of the vehicle body 22 is stopped between the second rail portions 18a and 18b. In this case, in the second coating mechanism 20, as shown in FIG. 4, the coating guns 74a to 74i are oriented substantially at right angles to the left side portion 28, the upper portion 32 and the right side portion 30 of the vehicle body 22 and are separated by a predetermined distance. In this state, the entire surface of the vehicle body is painted. This painting operation will be described in detail below.

That is, first, when painting the left side portion 28 of the vehicle body 22 via the second painting mechanism 20, the lifting motor 54 is driven so as to move the painting guns 74a to 74i from the position P ₁ to the position P ₂ . To do. Therefore, the ball screw 52 connected to the lifting motor 54 rotates, and the support plate 58 screwed into the ball screw 52.
The arm 72 rises in the direction of arrow D via. Further, at that time, the turning motor 62 is driven to rotate the gear 64 pivotally supported by the rotary shaft 62a, and the arm 72 is rotated in the arrow B direction via the gear 70 meshing with the gear 64.

Therefore, the coating guns 74a to 74i mounted on the arm 72 are
Will be oriented at right angles to the left side 28 of the vehicle body 22.
Further, if necessary, the pinion 46 is rotated under the driving action of the traveling motor 44, and the pacings 36c and 36d are moved in the predetermined direction along the rail bracket 34 via the rack 36 meshing with the pinion 46. As a result, each painting gun 74a-7
A constant distance can be ensured between the 4i and the left side portion 28 of the vehicle body 22, and the coating guns 74a to 74i uniformly inject the paint onto the left side portion 28.

After finishing painting the left side portion 28 of the vehicle body 22 in this way,
As described above, the gear 64 is driven by the turning motor 62.
Is rotated, and the arm 72 is rotated in the direction of arrow B via the gear 70 meshing with this, and the coating guns 74a to 74i are directed vertically downward. At this time, the coating guns 74a to 74i are used for the hood 32a, the roof 32b and the trunk cover of the vehicle body 22.
The position is adjusted so as to be substantially orthogonal to 32c and separated by a predetermined distance.

That is, in FIG. 3, when the lifting cylinder 78a is driven to displace the piston rod 80a in the direction of arrow A,
The bracket 82a that engages with the piston rod 80a descends. Therefore, the coating gun 74a held by the piston rod 88a and the rod body 90a of the swing cylinder 86a disposed in the bracket 82a is displaced in the direction of arrow A, and the coating gun 74a is moved from the bonnet 32a to the predetermined position. When the distance is reached, the driving of the lifting cylinder 78a is stopped. Further, in this case, when the surface of the bonnet 32a facing the coating gun 74a is inclined, the swing cylinder 86a is driven to displace the piston rod 88a in a predetermined direction. Therefore, the swinging plate 92a is swingably displaced in the arrow direction through the connecting portion 94a engaged with the piston rod 88a, and the swinging cylinder 86a is positioned at a position where the coating gun 74a is substantially orthogonal to a predetermined portion of the bonnet 32a. Stop driving.

It should be noted that the above-mentioned coating guns 74b and 74c are also applicable.
Similarly to 74a, the lifting cylinders 78b, 78c and the rocking cylinders 86b, 86c are driven to rock the coating guns 74b, 74c according to the shape of the bonnet 32a, and the respective coating guns 74b, 74c and the bonnet. Position it so that it has a predetermined gap with 32a.

On the other hand, in the coating guns 74d to 74g for coating the roof 32b, the rocking cylinders 86d to 86g are driven to drive the coating guns.
74d to 74g are swung corresponding to the shape of the roof 32b. At this time, at least the lifting cylinders 78d and 78g are driven to displace the piston rods 80d and 80g in the direction of arrow A to position the coating guns 74d to 74g with respect to the roof 32b.

Furthermore, paint gun 7 for painting the trunk cover 32c
In 4h and 74i, the coating guns 74h and 74i are arranged at a predetermined distance from the trunk cover 32c under the driving action of the lifting cylinders 78h and 78i and the swing cylinders 86h and 86i as in the above-described coating gun 74a. It

In this way, the coating guns 74a to 74i are connected to the hood of the vehicle body 22.
Positioning corresponding to 32a, roof 32b and trunk cover 32c, and driving motor 44 to drive pinion
46 is rotated, and the casings 38c and 38d are moved in the direction opposite to the arrow C through the rack 36 that meshes with this. Therefore,
The second coating mechanism 20 passes the position P ₃ in FIG. 4, and the entire upper surface 32 of the vehicle body 22 is coated via the respective coating guns 74a to 74i.

When the coating of the upper portion 32 is completed, the coating guns 74a to 74i are displaced by a predetermined distance in the direction of arrow D under the driving action of the lifting cylinders 78a to 78i, respectively, and the swinging cylinders 86a to 86i are actuated. The tip ends of the coating guns 74a to 74i are swung in the arrow direction by a predetermined angle. As a result, the coating guns 74a to 74i are positioned corresponding to the shape of the right side portion 30 of the vehicle body 22.

Therefore, the casing 38 is driven by the driving motor 44.
While displacing c and 38d in the direction opposite to the arrow C, the turning motor 62 is driven to rotate the arm 72 in the opposite direction, and the arm 72 is moved in the direction indicated by the arrow A under the action of the lifting motor 54. Shift to. Therefore, the coating guns 74a to 74i
₄ reaches the position P ₄ in FIG. ₄ , and the painting of the right side portion 30 of the vehicle body 22 is started. Further, the arm 72 is displaced in the direction of the arrow A while being rotated in a predetermined direction under the driving action of the lifting motor 54 and the turning motor 62, and the casings 38c and 38d are moved under the action of the traveling motor 44 if necessary. By moving in a predetermined direction, the coating guns 74a to 74i are applied to the right side portion 30 in a state in which the coating guns 74a to 74i are substantially orthogonal to the right side portion 30 and are separated by a predetermined distance.

Then, as shown in FIG. 4, when the spray gun 74a to 74i reaches the position P _5, will be painted over the outer plate portion entire vehicle body 22 is terminated, wherein said coating gun 74a through Stop spraying paint from 74i. Then, the vehicle body 22 after painting is transported in the direction of arrow C under the drive of the vehicle body transport mechanism 12.

At that time, the next vehicle body 22 is conveyed between the first rail portions 14a and 14b, and the front portion 24 and the rear portion 26 of the vehicle body 22 are coated via the first coating mechanisms 16a and 16b. When the new vehicle body 22 is painted through the first painting mechanisms 16a and 16b, the traveling motor 44 is driven to drive the casings 38c and 38d.
Are arranged as shown in FIG. 1, and the coating guns 74a to 7a are mounted via the lifting motor 54 and the turning motor 62.
4i is oriented in a direction substantially orthogonal to the left side portion 28 of the vehicle body 22.

In this case, according to the present invention, the vehicle body 22 can be coated all at once in a short time, and a uniform and aesthetically pleasing multilayer can be formed over the entire outer plate portion of the vehicle body 22.

That is, as described above, the coating device is applied via the vehicle body transport mechanism 12 in a state in which both side portions 28, 30 (vehicle length direction) of the vehicle body 22 are oriented in a direction substantially orthogonal to the transport direction (direction of arrow C).
It has been delivered to 10. Therefore, as shown in FIG. 1, the first painting mechanism 16a, 1a that coats the front portion 24 and the rear portion 26 of the vehicle body 22.
6b only needs to be moved by a distance S ₁ slightly longer than the vehicle width of the vehicle body 22 (front portion 24, rear portion 26) to coat the front portion 24 and the rear portion 26. On the other hand, the second coating mechanism 20 that coats both side portions 28, 30 and the upper portion 32 of the vehicle body 22 may be moved by a distance S ₂ that is a vehicle width of the vehicle body 22 plus a predetermined distance.

Therefore, as in the conventional case, the longitudinal direction of the vehicle body 22, that is,
Compared to the one in which both side portions 28, 30 are oriented in the transport direction (direction of arrow C), the movement distance of each of the coating mechanisms 16a, 16b and 20 is shortened as much as possible to perform the painting work of the vehicle body 22. It is possible to do all at once in a short time. As a result, there is an advantage that the efficiency of the entire coating line in which the coating device 10 is incorporated can be easily achieved and the coating line can be effectively shortened.

Moreover, the coating guns 74a to 7 attached to the second coating mechanism 20.
The 4i is configured to be rotatable and movable up and down via an arm 72, and the coating guns 74a to 74i are displaceably provided corresponding to the shape of the vehicle body 22. Therefore, the coating guns 74a to 74i can be sprayed in a state where the coating guns 74a to 74i are substantially orthogonal to the side portions 28, 30 and the upper portion 32 of the vehicle body 22 and are separated by a predetermined distance. As a result, it is possible to uniformly inject the paint over the entire surface of the vehicle body 22 and perform a beautiful painting operation.

Furthermore, FIG. 5 shows a coating apparatus according to another embodiment for carrying out the coating method according to the present invention. In this case, the same components as those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

That is, the coating device 120 according to the second embodiment is provided with a pair of rail portions 122a and 122b that are erected on both sides of the vehicle body transport mechanism 12.
In addition, casings 38a and 38c are movably mounted on the rail portion 122a, and casings 38b and 38d are provided on the other rail portion 122b.

In such a configuration, the vehicle body 22 is transported in the direction of arrow C through the vehicle body transport mechanism 12, and the vehicle body 22 is the coating device.
When reaching the painting position 120, the vehicle body 22 is stopped.
Therefore, first, the casings 38a and 38b forming the first coating mechanisms 16a and 16b are connected to the rail portions 122a and 122b in the same manner as described above.
Paint is sprayed from each of the coating guns 50a and 50b while moving in the direction opposite to the arrow C on the rail bracket 34 of the vehicle body.
22 front 24 and rear 26 are painted.

Then, the second coating mechanism 20 is driven. In this case, the second
The coating mechanism 20 follows the above-mentioned procedure, and the both sides 28 of the vehicle body 22,
The coating of 30 and the upper part 32 is performed, the arm 72 is moved up and down and rotated, and the casings 38c and 38d are displaced along the rail bracket 34 in a predetermined direction. As a result, the coating guns 74a to 74i are directed in a direction substantially orthogonal to the left side portion 28, the upper portion 32, and the right side portion 30 of the vehicle body 22 and are separated by a predetermined distance so that the entire surface of the vehicle body 22 is uniformly coated.

In the coating apparatus 120 according to the second embodiment, in particular, each coating mechanism 16a, 16b and 20 is provided with a pair of rail portions 122a,
Since it is mounted on 122b, there is an effect that the space occupied by the coating device 120 can be further narrowed.

[Effects of the Invention] As described above, according to the present invention, an object to be coated such as an automobile body is arranged with its longitudinal direction oriented in a direction substantially orthogonal to the coating direction, and the paint injection means is used to coat the object. The work of painting this object is performed by displacing it with respect to the shape of the object.
In this way, since the coating is performed along the lateral direction of the object to be coated, the coating work time can be shortened all at once, and the efficiency of the entire coating process can be easily achieved. In addition, since the coating gun is always oriented substantially at right angles to the shape of the coated surface of the object to be coated and the coating work is performed at a predetermined interval, a coated surface having an excellent appearance can be formed on the object to be coated. You can get the advantage.

Although the present invention has been described with reference to the preferred embodiment, the present invention is not limited to this embodiment,
It goes without saying that various improvements and design changes can be made without departing from the scope of the present invention.

[Brief description of drawings]

FIG. 1 is a plan view of a coating apparatus for carrying out the coating method according to the present invention, FIG. 2 is a partial sectional side view of the coating apparatus shown in FIG. 1, and FIG. 3 is a coating apparatus according to the present invention. FIG. 4 is an enlarged view of a constituent coating gun, FIG. 4 is an explanatory view when coating an automobile body with the coating device, and FIG. 5 is a coating device according to another embodiment for carrying out the coating method according to the present invention. FIG. 10 …… Coating device, 12 …… Car body transport mechanism 14a, 14b …… Rail section, 16a, 16b …… Coating mechanism 18a, 18b …… Rail section, 20 …… Coating mechanism 38a, 38b …… Casing 44 …… Running Motors, 50a, 50b …… Painting gun 54 …… Lifting motor, 62 …… Swing motor 72 …… Arm, 74a to 74i …… Painting gun

Claims (2)

[Claims] Claim: What is claimed is: 1. A flow direction of an object to be coated conveyed along a coating line is oriented in a direction substantially orthogonal to the conveying direction, and then the object to be coated and the paint injection means are relatively moved. The coating material is ejected while being moved in the conveying direction, while the coating material injection means is oriented substantially at right angles to the coating surface of the object to be coated and is moved so as to be separated from the coating surface by a predetermined distance, whereby the object to be coated is A painting method characterized by painting. 2. A coating device for coating an object to be coated conveyed along a coating line in the lateral direction thereof, for coating both sides and an upper part in the longitudinal direction of the object to be coated. The coating mechanism includes a movable body that can move back and forth in the lateral direction of the object to be coated, and a movable body that extends substantially in the longitudinal direction of the object to be coated and that can rotate and / or move up and down. And a plurality of coating guns provided on the arm, at least one coating gun being capable of advancing and retracting and / or swinging with respect to the arm.