JPS6135913B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention is particularly applicable to the painting of plastic cabinets having a plurality of surfaces to be painted, in which the operator only carries out the work of mounting and removing the objects to be painted. The present invention relates to a method of automatically performing only the painting process using a painting robot.

[Technical background of the invention and its problems]

2. Description of the Related Art As a conventionally widely used automatic painting method, a method of sequentially painting a plurality of objects to be painted using an automatic painting means such as a painting robot is generally well known.

Among these, for example, the objects to be coated are placed on a loop-shaped conveyor at appropriate intervals, and the conveyor is moved intermittently at each interval of placing the objects to be coated, so that the objects are placed at a predetermined position on the moving path of the conveyor. The typical form was one in which painting was automatically applied by a painting robot. However, in order to use the coating method using a conveyor as described above, a large area is required to place the circulating conveyor, and it is not suitable for introduction to small and medium-sized factories where equipment installation space is limited. In other words, it was not necessarily a desirable coating method.

Instead of using such a conveyor system, we used a merry-go-round-like rotating table with a relatively small rotation radius so that it could be installed in a relatively small space, and the devices were arranged circumferentially at appropriate intervals on the rotating table. There were methods of sequentially painting multiple objects to be coated using a coating robot, but in either case, the tendency was to place as many objects as possible on the conveyor or table in order to make effective use of the mounting space. It was hot.

In other words, in automatic painting equipment using this type of painting robot, i.e., in which the operator is responsible only for attaching and removing objects to be painted, the moving speed of the conveyor or table is controlled by the operator. It has to be reasonable for the workers, so in addition to its original purpose of saving labor, in recent years it has also been used to prevent the health problems of workers that are associated with painting work, and to ensure the uniformity of work. Therefore, when a person is involved in the processing path, the processing efficiency of the entire device must be adjusted to the slowest average processing speed of the person. This was also an unavoidable fact. When conventional painting methods are applied in such situations, many of the objects to be painted, which are placed on conveyors or tables, are
Alternatively, after painting, it is left on the equipment for a relatively long period of time, that is, before and after painting, it generally goes around the conveyance path once, until it reaches the operator's hands. There was a considerable risk that floating paint would adhere to the painted surface, or that floating paint would re-adhere to the painted surface that had begun to dry after painting, degrading the appearance quality of the product to some extent. in the end,
The conventional automatic painting method having the above-mentioned configuration cannot be said to be a very useful method unless a separate processing means such as a strong drying means is arranged in series in the conveyance path. In addition, the monotonous movements common to automatic machines of this type, e.g.
Since the object to be coated is transported in only one direction, there is a high risk of simple mistakes due to familiarity with the work or, in the worst case, serious accidents that could threaten human life. It was true.

[Purpose of the invention]

The present invention prevents dust and dirt from adhering to the object to be painted before or after painting, and floating paint re-adhering to the painted surface that has begun to dry after painting, degrading the appearance quality of the product. It is possible to omit unnecessary transport and movement processes such as this, and to make effective use of the movement process time, ensuring sufficient effective working time for workers and painting robots. The purpose of this invention is to provide an automatic painting method that is less likely to cause serious mistakes or work accidents.

[Summary of the invention]

In the present invention, only the first and second objects to be painted are placed on a reciprocating rotating device that horizontally rotates 180 degrees while facing each other by 180 degrees, and the side where the first object is located is A coating robot is arranged, and the first surface of the object to be coated is coated by the planar movement of the paint injection nozzle head of the coating robot. The first object to be coated is sequentially painted while being rotated three times by 90 degrees by the step rotation means, and the first object to be coated, which has been coated on the entire surface, is rotated back to the operator's position by the reciprocating rotation device, and The rotation axis performs a fourth step rotation of 90 degrees in parallel with the rotation of the reciprocating rotation device, and the first side of the painted object is completely returned to its initial state by facing the operator. Then, by moving the second workpiece to the painting robot side, the unpainted second workpiece is subjected to the same painting process as the first workpiece, and the unpainted second workpiece is coated with the painted first workpiece. This constitutes an automatic painting method characterized by having a procedure for handling the object to be painted, such as removing the object to be painted from the reciprocating rotation device and attaching a third object to be painted next. It is.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figures 1 and 2 show an automatic painting device that embodies the automatic painting method of the present invention. 3 is a robot, 3 is a worker, and 4 is a washing booth. The object conveying device 1 carrying the object to be painted is arranged so that its standard stop position is at an angle of about 30 degrees with respect to the installation opening surface of the washing booth 4, and the painting robot 2 is mounted on the washing booth 4. The water washing booth 4 is arranged so as to face one end of the object conveying device 1, which rotates close to the side and faces the object to be painted, and behind the object to be painted. , the operator 3 is disposed toward the other end of the object conveying device 1, which is located away from the washing booth 4, forming the basic form of the coating system.

Next, details of the object conveying device 1 will be explained based on FIGS. 2 and 3.

In the figure, reference numeral 5 denotes a base of the object conveying device 1, and inside the base 5 there is an air cylinder 6, a rack gear 7 that is connected to the air cylinder 6 and moves reciprocatingly, and a rack gear 7 that meshes with the rack gear 7 and reciprocates. A spur gear 8 that converts motion into rotational motion, and a 180 shaft inserted into the spur gear 8.
A rotary shaft 9 is built in, and the rotary shaft 9 is configured to rotate reciprocatingly by 180 degrees with one reciprocating movement of the air cylinder 6. 10 is the forward and backward movement limit of the air cylinder 6, that is, the 180
A limit switch 11 is a limit switch that accurately detects the longitudinal momentum of 180 degrees of rotation applied to the rotation axis 9, and a limit switch 11 is a limit switch for detecting a buffer range for operating a deceleration mechanism to reduce the impact caused by starting and stopping the air cylinder 6. It is a limit switch. 12 is a reciprocating rotation device that forms the main part of the object conveying device 1;
It is connected to the 180 degree rotation shaft 9 of the base 5 and rotates back and forth at a rotation angle of 180 degrees. 13 and 1
4 is provided protrudingly from both ends of the upper surface of the reciprocating rotation device 12 and rotates sequentially in 90 degree angle steps.
This is a 90 degree rotation shaft that constitutes a 90 degree step rotation means, and the object to be coated 15 is mounted on the 90 degree rotation shafts 13 and 14.
A mounting jig 16 is attached to support the mounting. The 90-degree rotating shafts 13 and 14 use a continuously variable transmission gear motor 17 as a common drive source, and are connected via power transmission mechanisms having the same configuration. To explain this power transmission mechanism in more detail, the outer ring 20a of the one-turn cam clutch 20 is constantly rotated by the drive of the gear motor 17 with the continuously variable transmission via the sprocket 18 and the chain 19. inner circle 2
When the trip lever 21 connected to the cam 0b is released by the operation of the air cylinder 22, the inner ring 20b of the one-turn cam clutch 20 rotates 360 degrees,
The Geneva gear (driver) 23, which is coaxial with the inner ring 20b of the one-turn cam clutch, also rotates once through 360 degrees. The Geneva gear (wheel) 24 that meshes with the Geneva gear (driver) 23 is divided into four parts, so when the Geneva gear 23 rotates once 360 degrees, the Geneva gear 2
4 will be rotated by 1/4 degree by 90 degrees, and by repeating this operation, the 90 degree rotating shafts 13 and 14 coaxial with the Geneva gear 24 will be rotated by 90 degrees. Note that the 90-degree rotating shafts 13 and 14 do not rotate on both the left and right sides at the same time, but are controlled by a signal generator and a control device (not shown) to rotate the painting robot 2.
Only the side located in the direction to be painted rotates, and if the object 15 to be painted needs to be painted on four sides, it will rotate three times at 90 degrees each, and when all four sides are painted, it will rotate back and forth. The rotation device 12 horizontally rotates 180 degrees and returns to the original position where the worker 3 is.
In addition, in parallel with the rotation operation of this reciprocating rotation device 12, that is, in order to effectively utilize the time required for the rotation,
The 90-degree rotating shaft on which the painted object 15 is placed further rotates 90 degrees a fourth time, and the object 15 is rotated a fourth time.
The first side of the machine is facing the operator and the machine is completely restored to its initial state. In this state, worker 3
The painted object 15 is removed from the mounting jig 16, a new unpainted object is placed in its place, and the above-described painting operation is sequentially repeated.

〔Effect of the invention〕

As detailed above, the present invention reduces the number of objects to be painted to be placed on the coating device to only two, and makes the angular rotation in 90 degree increments necessary for coating four surfaces a minimum of three times at the coating position. , the physical return (initialization) of the machine to its initial state (initialization), which is necessary for the operator and the coating equipment as a whole, is done by swapping the positions of the two objects to be coated180
Since this is carried out during the period of horizontal rotation, sufficient effective working time can be secured for the operator and the painting robot.In addition, since the actual movement time is extremely short, there is no chance of dust or dust getting stuck. Not only can you avoid the risk of floating paint adhering to the surface of the painted object and reducing the quality of the painting, but also the reciprocating rotation system is used for transportation.
Comparing the configurations, it is effective in avoiding simple work mistakes and work accidents that tend to occur in this type of monotonous work, especially when using transport methods that have movement patterns in only one direction. It is very easy to use and can give you great benefits.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing a coating device that specifically implements an automatic coating method according to an embodiment of the present invention;
FIG. 2 is a partially omitted plan view of FIG. 1, and FIG. 3 is a sectional view showing a power transmission mechanism that embodies the operation of the coating device. DESCRIPTION OF SYMBOLS 1... Painting object conveyance device, 2... Painting robot, 4... Washing booth, 5... Base, 12... Reciprocating rotation device, 13, 14... 90 degree rotation axis, 16...
...Object to be painted.

Claims (1)

[Claims] 1. Only the first and second objects to be coated, respectively.
They are placed on a reciprocating rotating device that faces each other 180 degrees and horizontally rotates 180 degrees, and a painting robot is placed on the side where the first object to be painted is located, and the paint injection nozzle head of the painting robot is moved in a plane. The first surface of the object to be coated is coated by the operation, and the second to fourth surfaces of the first object to be coated are sequentially coated while being rotated three times at 90 degrees by the 90 degree step rotation means, and the desired amount is applied. The first object to be coated, which has been completely coated, is rotated back to the operator's position by the reciprocating rotation device, and the 90 degree rotation axis is further rotated 90 degrees in parallel with the rotation of the reciprocation rotation device. By rotating the step for the fourth time, the first side of the painted workpiece is completely returned to its initial state by facing the operator, and the second workpiece is moved towards the painting robot. The unpainted second object to be painted is subjected to the same painting process as the first object to be painted, and the painted first object to be painted is removed from the reciprocating rotation device and then applied to the third object to be painted. An automatic painting method characterized by comprising steps for handling the object to be painted, such as attaching the object to be painted.