JPH0461945A - painting system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention mainly relates to a case for equipment such as a control panel, a distribution board, a power distribution board, a cubicle, a base for installing these, and a base mounted thereon. It relates to a coating system that degreases, chemically coats, washes, undercoats, and topcoats workpieces such as doors, door frames, internal shelf boards, shelf frames, and interior surfaces through a series of routes.

[Prior Art] The various coating systems that have been used in the past involve preparing an appropriate number of lots for a given piece of equipment, and applying a series of degreasing and chemical coatings to each work piece in succession. We perform film treatment, water washing, undercoating, and topcoating.

[Problems to be solved by the invention] With this method, it is difficult to change the color λ while the line is in operation, and it is also difficult to manage the number of points for each set during unloading, especially as a mixed line that handles a wide variety of products in small quantities. It was unsuitable for this painting system.

[Purpose of 9th Anniversary] This invention was made based on the following circumstances, and it is possible to produce work for each order! Or several times the set (+/2.1/3
The objective is to provide a coating system that is realized by a tact operation method in which the work is carried out in a predetermined tact in the order of each step (mainly for 1.2 sets, and 1.2...sets in some cases). .

[Means for Solving the Problems] Therefore, in the present invention, in a coating system in which a workpiece is moved through a series of paths in each takt and subjected to degreasing, chemical conversion coating treatment, washing, undercoating, and topcoating, The workpieces to be moved in each tact are suspended from one or several sets of the corresponding equipment on the same caliper, and transported together with the caliper to the work section of the required process in each takt, and then coated with the above-mentioned When painting or topcoating, in the paint booth with the caliper retracted,
The caliper is rotated, and a worker uses a lifter to spray paint onto the work suspended from the caliper using a spray gun.

[Example] Hereinafter, an example of the present invention will be specifically described with reference to the drawings. The coating system according to the invention provides a work section for loading and unloading at the beginning of the path. In the work section 1, a pre-processing automatic conveyance device 2 equipped with a loading/unloading means is prepared, and the worker can move it from the direction of the arrow.
While receiving the set work into the caliper 3,
Arrow B Caliper: 3
The caliper 3 can be moved along the rail 4 suspended from the beam by the F2 pretreatment automatic transport device 2.

That is, the pretreatment automatic conveyance device 2 is equipped with a truck that moves along the rails 4, and an elevating means that suspends the caliper 3 on the truck and raises and lowers the caliper 3. By the action of the pretreatment automatic transport device rR2, the workpiece moves along the rail 4 together with the caliper 3, and is transferred to the next work section, the preliminary degreasing tank 5. Degreasing chemical tank6. Washing tank 7
and 8 for 1 tact (for example, 20 minutes), and is immersed. In this case, for example, various immersion times may be set to 1.5 minutes in a preliminary degreasing tank, 0.5 minutes each in a degreasing tank and a washing tank. Parallel to this rail 4,
Separately, a route IO is prepared for transporting the stand IH9 that supports the caliper 3. Then, the cart 9 is mounted on the turntable 11 disposed at the end of the rail 4.
The direction of the caliper 3 can be changed by 90 degrees, so that the cart 9 receives the caliper 3 together with the workpiece from the pretreatment automatic transport device 2. The structure of the caliper 3 and the truck 9 may be as shown in FIG. 2, for example.

Rails 9a, 9a are arranged on both sides of the truck 9, and both sides of the caliper 3 are sent onto these rails 9a, 9a and supported. Therefore, even if the workpiece is suspended in the rectangular parallelepiped space surrounded by the imaginary line, the caliper 3 can be carried in and out of the cart 9 in the horizontal direction. The cart 9 is conveyed to the next route 12 via the turntable 11, and introduced into the next work section 13, which is a draining and drying oven. Here, the workpiece that has been washed with water is heated and dried. Also, when this draining and drying is completed, the trolley 9
is transported to a route 14 orthogonal to the route 12,
This is introduced into work section 15 where undercoat painting is performed. Here, the caliper 3 is sent to the painting booth +5a together with the work while leaving the trolley 9 as it is. For this reason,
The work section 15 is provided with a conveyance means for holding the caliper 3 and sending it to the coating booth 15a, and a turning mechanism for turning the caliper together with the workpiece. In the booth 15a, a worker holds a spray gun, front and back.
A lifter that can be moved up and down is provided, and in this embodiment, the workpiece is painted manually by the worker. The coating system used at this time is an electrostatic coating gun for powder coating. If the above work is completed within 1/2 to 2/3 of the takt time, return to the painting booth +5a
The workpiece is taken out along with the caliper 3 from the workpiece, the caliper 3 is placed on the trolley 9, and the caliper 3 is introduced into the next work section 16, which is a powder baking drying furnace, via a route 14. The time required for drying and baking in this drying oven can be adjusted by adjusting the takt number.
For example, two takt times are used for drying in this embodiment.

For this reason, the drying oven is designed to have a size that can accommodate two calipers 3. That is, the work section 16 is functionally divided into an area 16a that covers the first tact and an area +6b that covers the next takt. Next, the caliper 3 and the workpiece go through the route 14 with the trolley 9 -Lr1! ! It is introduced into work section 17 where painting is performed. Here, as in the case of the work section 15 mentioned above, the caliper 3 is transported together with the workpiece to the painting booth 17a by means of conveyance means.
It is sent into the interior, where it is coated with two coats using a spray gun. At this time, the worker performs painting work with a spray gun while moving back and forth and up and down using a beam lid. When the time within 172 to 273 of one takt has elapsed, the caliper 3 and the workpiece are returned from the booth 17a to the trolley 9, transferred to the return route +8 via route 14, and introduced into the next work section 19. This work section 19, like the previous drying oven, is a drying oven prepared for drying the top coat. After drying for one takt, the trolley 9 returns along with the caliper 3 and the workpiece to route 1.
8, and is conveyed to a turntable 20 provided at a position where the route 18 intersects with the above-mentioned rail 4.

Now swiveled through 90 degrees, the caliper 3 and the workpiece are returned to the first working section I with the aid of the automatic transport device 2 and unloaded there. The empty cart is transported as it is to the route 10, and the pre-processed workpiece is brought to the turntable 1 to receive the caliper 3 thereon.

In this embodiment, the carts are transferred by workers, and rails with rollers are provided along each route to move the carts.

Also, if electrostatic painting is performed while the workpiece is heated to a temperature of 100°C or higher, there will be variations in the coating film thickness.
It is necessary to take measures to cool the workpiece before each painting operation. For this reason, it is advisable to divide the takt time, such as radiating heat from the workpiece, on the route I4. Furthermore, if the paint discharged from the spray gun is a solvent type, temperature control is required to avoid poor finish such as shark skin, matteness, foaming, and wrinkles. Therefore, it is preferable to provide a setting work section (not shown) between the work sections 16 and 17, for example. In addition, regarding the workpieces returned to the unloading position via route 18, if the temperature is too high, the coating film will be soft and easily scratched, and there is a risk of burns to the worker. It is a good idea to separate the cooling takt time.

Further, in this embodiment, another work division 21 is provided between the work divisions 17 and 18. here,
When the workpiece is placed in the baking oven (top coating drying oven) after coating, time is taken for setting to avoid the risk of the coating film foaming.

In addition, each work division in the above embodiment is set to perform loading and unloading in units of one or more takts, and is a patch type, but it is set to perform loading and unloading in units of one or more takts, but it is set to carry in and out in units of one or more tacts, and is a patch type. It would be good to devise a way to carry out a series of painting operations in a routine manner that does not waste time so that a series of operations can be carried out continuously.

[Effects of the Invention] The present invention has been described in detail above, and one of the devices to be coated is
Alternatively, several sets of workpieces are suspended from calipers, and the work is divided into sections for each tact, and in the areas to be painted, a lifter is operated in the booth to achieve painting with a spray gun. Therefore, in the method of the present invention, since it is possible to paint in sets, it is easier to change colors between sections than with the conventional method, the quality of each set is stable, and the arrival of each set is more convenient. , Departure 4:
It is a coating system that is easy to control and is convenient for high-mix, low-volume production. In addition, there is an advantage that inventory of materials, intermediate work-in-progress, products, etc. is not required, and since it is a tact operation method, there is also the benefit of high work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a block schematic plan view showing an embodiment of the present invention, and FIG. 2 is a perspective view of a caliber and a cart for suspending a workpiece. 1.5,6,7,8.13,15,16゜17.19.
21... Work division 2... Pre-treatment automatic conveyance device 3... Caliber 4... Rail 9... Cart 10.12, 14.18-- Route 11.20-... Turntable. Agent Patent Attorney Johei Yamashita

Claims (1)

[Claims] In a painting system in which the workpiece is moved through a series of paths in each takt, and subjected to degreasing, chemical conversion treatment, water washing, undercoating, and topcoating, the workpiece moved in each takt is moved by one or more of the corresponding equipment. Several sets are hung on the same caliber, and transported together with the caliber to the work section of the required process at each takt, and during the undercoating or topcoating, the caliber is pulled into the paint booth. Rotate the caliber,
A painting system characterized in that a worker sprays paint onto the work suspended on the caliber using a spray gun while moving with a lifter.