JPS5973077A - Automatic coater - Google Patents

Abstract

PURPOSE:To enable to efficiently coat a predetermined part with high accuracy, by providing a self-running carrier equipped with an atomizing coater in parallel with a tact conveyer for carrying a workpiece to be coated. CONSTITUTION:A workpiece 12 to be coated being carried in a state mounted on a truck by a tack conveyer 17 is stopped at a predetermined position. Thereafter, by the actions of the applicator gun 14 horizontally movable back and forth and the coater 15 vertically movable up and down of a portal coating apparatus 13, the predetermined part of the workpiece 12 to be coated is coated with these devices being let self-run by a carrier 18. Hereon, the operation of the truck on which the workpiece 12 to be coated is mounted is controlled in a manner such that said truck ascends, descends, goes forward or comes back at the predetermined position. During said movement, coating is applied to each part. Thus, accurate and uniform coating work can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Conventionally, there is an automatic painting apparatus shown in FIG. 1, which is used to paint objects such as automobile bodies. That is, in the painting booth 1, for painting the horizontal surface of the object 2, for example, the upper surface of a car body, the object 2 is surrounded by a gate-shaped frame 6, and there is a coating device 4 for air atomization or electrostatic atomization.
is fixed or reciprocates horizontally to paint. on the other hand,
For painting vertical surfaces, such as the side surfaces of vehicle bodies, a vertical reciprocating painting device 5 or a stationary painting machine 5 is used.

However, in such conventional automatic coating equipment, the air atomization or electrostatic atomization coating machine is attached to a horizontal reciprocating device, a vertical reciprocating device, or a fixed stand, and is attached to the object to be coated or the line conveyor, etc. Since the coating was carried out by force, the object to be coated had to be transported continuously. On the other hand, Fig. 4 (A)
, (B), and (C), when painting a small part of corner X or interior Y with a robot, the distance between the atomizing paint gun and the object to be coated is usually several tens of thousands. Since there is no gap between the parts, there is a risk of side collision with the object to be coated and damage to the object unless the correct positional relationship is maintained. For this reason, when painting a detailed area like the one described above using a robot, it is desirable to do so while standing still. Therefore, the automatic painting equipment that paints horizontal and vertical surfaces and the robot that paints detailed areas will coexist in the same painting booth, or in this case, the conveyance equipment will be a continuous conveyor in the automatic painting zone. , tact conveyor in the robot painting zone will be mixed,
Therefore, the number of drive units increases and two or more types of conveyance devices are also required. For this reason, the transfer mechanism between different types of transport devices also becomes complicated. However, paint mist and the like adhere to the inside of the painting booth and have an adverse effect on the operating parts. Therefore, in order to eliminate such problems, it is desirable to use a tact conveyor. However, if all conveyance devices in the painting booth are tact conveyors,
There was a problem in that the automatic painting equipment malfunctioned.

The present invention has been made by focusing on such conventional problems, and is equipped with a tact conveyor for conveying objects to be coated, and an atomization type coating device that can move by itself in the traveling direction of the tact conveyor. The purpose of this invention is to solve the above-mentioned problems by providing an automatic coating device that includes a conveyance device.

Hereinafter, the present invention will be explained based on the drawings. 5 to 7 are diagrams showing one embodiment of the present invention.

First, to explain the configuration, a tact conveyor 1 is installed in the coating booth 11 as a conveying device for the object 12 to be coated such as an automobile body.
7 is provided, and conveying devices 18 are provided on both sides thereof. This conveyance device 18 is, for example, a rail type, in which case the coating device is mounted on wheels 19 so as to be self-propelled.

The coating equipment includes a portal-type air atomization or electrostatic atomization coating equipment for painting the surface of the object to be coated 12 with a horizontally reciprocating paint gun 14, and one for painting the vertical surface. There are two vertically reciprocating painting devices 15, which are installed on the same conveying device 18 so as to be self-propelled at the same speed. This conveyance device @18 is a shuttle type conveyance device,
These are conveyors that stop at fixed positions.

The tact conveyor 17 for conveying the object to be coated is not particularly limited, and various commonly known ones can be used. There is. In other words, the main chain 20 is placed on the booth floor.
- a continuous running conveyor 21, which is stretched across the ground, a fixed position i4 stop conveyor 22, and a positioning device 23, which preferably positions the workpiece 12 to be coated at a predetermined position and stops the loaded trolley at a predetermined position. (Figure 9). Therefore, the fixed-position stop type conveyor 22 is installed close to and parallel to the continuous conveyor 21, and the main chain 24 of the conveyor 22 is extended from the tip of the conveying device 18 to the coating zone where the coating device is installed. The conveyor dog 25 of the main chain 24 is stretched higher than the main chain of the
1. 26 is a conveyor bit. 27゜28, 29, and 30 are the chain wheel, guide rail, return side chain, and frame of the fixed-position stop conveyor 22, respectively, and 31, 32゜3ro, 3
4.35 are the chain wheel, dog, guide rail, return side chain, and frame of the continuous conveyor 21, respectively. In the positioning device 23, as shown in FIG. 9, an actuator 7 such as an air cylinder is mounted on a bed 36, and a Y-shaped tip 38a of a piston rod 38 is connected to a base 40 via a pin 39. 40a, 40b,
41 and 42 are the bracket, positioning rod, wheel, and guide rail of the base 40, respectively, and the weight 43a
and a contact surface 43b (the dog 43 having a contact surface 43b)
A shaft 44 is provided on 40a so that it can be raised and lowered freely. 45 is a dog 46 at the bottom dead center position of the piston rotor 8.
This is a gate-shaped restraint member fixed to the bed 3B to hold it in the reclined position. Further, a dog 46 having a weight 46a and a contact surface 46b is provided on the bracket 42 of the bed 3B via a shaft 48 so as to be freely raised and lowered. Note that the description of the air conditioner, intake system, exhaust system, drainage system, etc. in the painting booth is omitted because well-known ones may be used.

Next, the operation will be explained based on the above-mentioned drawings. First, the fixed position stop conveyor 27 as the tact conveyor 17
The object to be coated 12 loaded and transported by a trolley is
When the conveyor 22 stops at a fixed position and the positioning device 26 operates as described later, the conveyor 22 stops at a fixed position. Next, by the action of the horizontal reciprocating coating gun 14 and the vertical reciprocating coating device 15 of the gate-type coating device 13, a predetermined portion of the object 12 is coated while these coating devices are self-propelled by the conveying device 18. Therefore, in this tact conveyor 17, when the trolley loaded with the workpiece 12 reaches the fixed position, the main chain 20 of the continuous traveling conveyor 21 is lowered, so that the dog 32 of the main chain 2D and the trolley are engaged. The engagement with piece d2 is released. The main chain 24 of the fixed-position stop type conveyor 22 has risen above the floor at the position where the main chain 20 of the continuous running conveyor 21 has descended, so the dog 2 of the fixed-position stop type conveyor 22
5 and the engagement piece d1 of the carriage, and the carriage is rapidly moved to the home position. When the truck approaches the home position, a detection device (not shown) is activated, and the piston rod 3B of the actuator 67 of the positioning device 23 starts forward movement based on the signal. As a result, the base 40 starts to move forward, and the dog 43 is released from the restraining member 45 and stands up while rotating to the left by the way 43a, and the rod 40b pushes the weight 46a of the dog 46. Dog 46 begins its standing motion. Then, the positioning member d3 of the dolly, which has stopped during the forward standing process of the dog 46 and the standing process of the dog 46, starts to engage with each dog 43.degree. 46, and thereby the dolly starts to move to the regular position. When the rod 40b of the base 40 comes into contact with the stopper 50, the piston roller 8 stops, and the dogs 45 and 46 completely stand up, and the positioning member d3 is held between the contact surfaces 4 and 46b of the dogs. The trolley is accurately positioned at the fixed position. After painting is completed, the piston rod 38 moves back,
The dog 46 is released from the restraint, moves to the inverted position by the operation of the weight 46a, and is disengaged from the positioning member d3. Further, when the base 40 moves back close to the limit of backward movement, the dog 43 comes into contact with the restraint member 45 and starts rotating to the right, and the base 40
When 0 stops at the backward movement limit, dog 4 RO is in the inverted position.

That is, after the piston rod 38 returns to the bottom dead center and is released from the restraint by the positioning device, the fixed position stop conveyor 22 starts operating and rapidly transports the carriage. In this way, the above-mentioned painting is performed every time the carriage is transported and positioned.

FIG. 10 shows another embodiment of the invention. That is, in a painting line for an object to be coated such as an automobile body, for example, when a top coat is applied, the object 12 to be coated, which has been conveyed by a tact conveyor 17 and reached a fixed position in a painting booth 11, is first coated with A. In the zone, an air gun attached to a fixed painting robot 51 blows and dusts panel mating drawings and the like. Next, after being once held on the idle stage in the B zone, the painting robot 5 is moved to the C zone and is attached to the first conveying device 18a so as to be able to move freely.
2, open the front door and open a part of the corner (for example, the 4th
After painting the part (X in Figure (C)), close it. Furthermore, in the D zone, the rear door is opened by the painting robot 5, which is attached to the second conveyance device 18b so as to be able to move freely, and a part of the corner (for example, the Y part in FIG. 4(C)) is opened.
After painting, close it. Then, in the E zone,
A gate-shaped horizontal reciprocating painting device 13a and a vertical reciprocating painting device 1 are attached to the sixth conveying device 18c so as to be self-propelled.
5a, while the object 12 to be coated is stopped, these coating devices 13a and 15a are allowed to run on their own, and the outer panel is coated by an air atomization method.

Further, in the F zone, a fixed painting robot 54 performs exterior panel correction painting. Then, with the object to be coated 12 stopped, the gate-type horizontal reciprocating coating device 13b and the vertical reciprocating coating device 1i15b, which are installed in a self-propelled manner on the fourth conveying device 18d, move these coating devices 1
Clear coating of the outer panel is performed by air atomization while 13b and 15b are self-propelled. In this case, clear coating is applied only when necessary, such as metallic coating. In addition, in the apparatus shown in FIG. 10, each device is substantially the same as that explained in detail in FIGS. 5 to 9, and therefore will be omitted.

As described above, according to the present invention, the configuration includes a tact conveyor for conveying objects to be coated, and a conveying device equipped with an atomization type coating device that can move by itself in the traveling direction of the tact conveyor. Because of this automatic coating system, the coating line can always run at a predetermined speed relative to the coating material even if the conveyance speed in other coating zones changes or stops. Can be painted with a thick film. In addition, although the object to be coated is transported in the conveying direction on the entire line, the object to be coated is stationary at the time of painting, so for example, the object to be coated, such as the inside of a door of a car body, etc. The small part is only a few tens of meters long.
Even in atomization type painting, which requires a precise distance for painting from a distance of m, predetermined areas can be painted with high precision. Therefore, the automatic painting equipment of the present invention can be used even if fixed types and self-propelled types are mixed, when various types of automatic painting equipment such as exterior panel painting equipment and robot painting equipment are frequently used on the same painting line. Since no special mechanism is required for mounting, connecting, and connecting the objects to be coated, and accurate coating is possible, there is little contamination of each component by mist, which is particularly effective.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of a conventional automatic coating device, Fig. 2 is a schematic side view of a conventional automatic coating device, and Fig. 6 is a schematic plan view of a conventional automatic coating device.
Cross-sectional views along the m-line, FIGS. 4(A) and 4(B). (C) is a perspective view showing an example of a painted area of a car; FIG. 5 is a schematic plan view showing an example of an automatic painting device according to the present invention;
FIG. 6 is a schematic side view showing an example of an automatic coating device according to the present invention, FIG. 7 is a cross-sectional view taken along the line ■-■ in FIG. 6, and FIG. 8 is a cross-sectional view showing an example of a tact conveyor according to the present invention. , FIG. 9 is a side view of the positioning device, and FIG. 10 is a schematic plan view showing another example of the automatic painting device according to the present invention. 11...Painting booth, 12...Object to be painted, 16...
Horizontal reciprocating painting device, 14...painting can, 15...
・Vertical reciprocating painting device, 17...tact conveyor,
18... Conveyance device for painting equipment. Patent applicant Nissan Motor Co., Ltd. 436 Figure 4 (A

Claims (1)

[Claims] A tact conveyor for conveying the object to be coated, and 1.
An automatic coating device consisting of a conveyor device equipped with an atomization type coating device that can move in the direction of travel.