JPH031072B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is mainly used in painting work for large and complex objects such as automobile bodies, to save labor in painting work, to free workers from harsh environments, and to improve productivity. This is a painting booth in which a painting robot equipped with an articulated manipulator is installed inside the booth body in order to improve the quality of the product. A return device for placing the object to be coated and transporting it into and out of the booth body is installed at or approximately at the center of the bottom of the booth body, which has a grating floor at the bottom. The present invention relates to a painting booth in which a painting robot is installed inside the booth main body, which corresponds to the side of the moving path of the object to be coated by the conveying device.

In conventional painting booths with the above configuration, everything from forming the concrete base for installing the booth to installing the robot and constructing the booth itself was done on-site. Not only are there a lot of work, but there are many different types of work involved during the work progress, which makes the construction period very long.In addition, the construction accuracy, especially from the joint between the ceiling and side panels of the booth body, has to be improved. It is difficult to obtain sufficient accuracy to reliably prevent air leakage, that is, suction of dust-containing air from outside the booth body into the inside of the booth body due to the laminar downdraft generated by the airflow blowing device, and as a result, There were various drawbacks such as the tendency to cause serious defects in the finished product and the high risk of on-site work.

In view of the above, an object of the present invention is to significantly reduce the number of man-hours on site and improve the assembly accuracy of the booth body.

The characteristic structure of the painting booth according to the present invention, which was developed to achieve the above object, is that the booth body is divided into a plurality of parts that are pre-fabricated in advance at a factory along the conveyance direction of the object conveyance device. It is constructed by sequentially assembling units on site, and each unit has divided paint supply pipes that are connected to each other when the units are assembled. The operational results of the present invention having the configuration are as follows.

In other words, by prefabricating the booth body so that it can be constructed by sequentially assembling units that are pre-fabricated in a factory in advance on-site, the number of man-hours on-site work can be significantly reduced, and the work content itself can be improved. It can also be made simple and easy, and the time required to proceed with the work can be kept to a minimum, resulting in a significant reduction in the construction period as a whole. In particular, by dividing the relatively long paint supply pipes that run along the booth body and holding them in the booth body unit in advance, piping construction for such long paint supply pipes that are difficult to handle can be simplified. This can be done all at once when assembling the unit, further improving work efficiency. Moreover, by making the unit prefabricated, the assembly accuracy of the booth body has been greatly improved, and the construction has been made to reliably prevent dust from being sucked into the booth body, as seen in conventional examples. The finish of the painted object can also be significantly improved. In addition, the dangers associated with on-site work have been reduced, allowing for safer on-site work.

Embodiments of the present invention will be described in detail below based on the drawings.

In FIG. 1, 2 is a booth main body, and a device 1 for blowing and forming a laminar downdraft for spray mist discharge inside the booth main body 2 is provided on the ceiling portion extending over the entire length thereof. A grating floor 5 is laid over the entire length at the bottom of the booth main body 2, and below this is a device for collecting paint mist collected through the entire grating floor 5 by the downdraft in a water film. Flowing water plate 13 with a gentle slope as a wash water overflow gutter 1
4. A paint mist collector 15 and the like are provided, and at approximately the center of the width of the entire grating floor 5, there is a trolley 1 on which the object A to be coated, such as an automobile body, is placed.
6, and a pusher type chain conveyor 17 capable of driving and stopping the cart 16, and a conveying device 3 for automatically moving the object A to be coated into and out of the booth main body 2 is provided. There is. At both sides of the booth main body 2 in the width direction corresponding to the left and right sides of the moving path of the object to be coated by the conveying device 3, there are running units 4 on both sides of the grating floor 5 along the moving direction of the trolley 16.
A first underframe 4B is transferred to a rail 4A laid on the U so that it can run and move freely, and on this first underframe 4B, it can run and move in a direction perpendicular or almost horizontal to the above-mentioned running direction. It consists of a second underframe 4C transferred to the second underframe 4C, a swivel stand 4D supported on the second underframe 4C, an arm 4E that can be driven up and down, a flexible arm 4F, and a spray gun 4G. Painting robots 4, 4 each consisting of a manipulator having accurate trajectory reproducibility are installed.

The airflow blowing device 1 is constructed as follows.

One air supply chamber 1C having a width equal to the total width of the booth body 2 is formed at the top of the ceiling of the booth body 2, and air is sent to the center of the width of the air supply chamber 1C by a blower not shown. A damper-equipped inlet 1a for conditioned air or outside air is provided, and bulkheads 18, 18 facing opposite left and right side plates of the booth body 2 are provided near both ends of the booth body 2 in the width direction. Filters 19, 19 are installed vertically from the lower wall 1b of the air chamber 1C, and are provided at the lower ends of the downward air supply paths formed between the partition walls 18, 18 and the left and right side plates of the booth body 2 facing each other. A filter 20 is stretched between the partition walls 18, 18 at a higher position than the filters 19, 19, and a filter 20 is stretched across both sides of the booth main body 2 in the width direction. Laminar downdraft air outlets 1A, 1A and 1B are formed in the central part, with the central part located higher. and,
From the air supply chamber 1C to the both side air outlet 1
Air supply route to A, 1A and air supply chamber 1
In the air supply path from C to the central outlet 1B, dampers 7 are installed in parallel at the same or almost the same height level.
A, 7A, and 7B are provided, and by adjusting the opening degrees of these dampers 7A, 7A, and 7B, the velocity of the air flow blown from the both side outlet ports 1A, 1A is adjusted.
The configuration is such that the velocity of air blown from the central outlet 1B is approximately 0.4 m/S.

Then, a high-speed air current of about 5 m/S to 10 m/S is blown toward the center of the booth main body 2 to the outside of both widthwise ends of the booth main body 2 at the lower part of the entire surface grating floor 5. Air outlet 1
The downward air flow blown out from A and 1A at a relatively low speed and containing a small amount of paint mist is passed through the narrow space behind the robots 4 and 4 and the gap between the grating floor 5 and the traveling unit 4U by the ejector effect. Air blowing chambers 9, 9 having slit-type air outlets 8, 8 are provided so as to draw air under the grating floor 5, and these air blowing chambers 9, 9 serve as an air supply route to the above-mentioned both side air outlets 1A, 1A. It is connected to the air supply chamber 1C via.

The booth main body 2 is constructed as follows.

That is, a plurality of units as shown in FIGS. 2 to 4, which have the same length along the conveying direction of the object conveying device 3, have the same ceiling height, and have an approximately gate-shaped outer shape. Units 2A, 2B, 2C...2N (length units of approximately 6 to 7 meters) are manufactured in advance at the factory, and the units 2A, 2B, 2C...2N are delivered to the site and assembled in sequence to create the desired size. A booth body 2 is constructed, and on the outer surface of the left and right side plates of each of the units 2A, 2B, 2C, . 6, 6 are fixed and held in advance at the stage of factory production, and these supply pipes 6, 6... are connected to the units 2A, 2B,
When assembling 2C...2N, they are configured to be connected sequentially via joints, etc. At both left and right ends of each of the units 2A, 2B, 2C...2N,
The above-mentioned slit-type air outlets 8, 8 are formed, and lighting fixtures 21, 21, . . . are attached to the inner surfaces of the partition walls 18, 18 in each unit 2A, 2B, 2C, . . ., 2N, respectively.

The ventilation chambers 9, 9 connected to the high-speed airflow outlets 8, 8 are fixedly held on the outer surfaces of the left and right side plates of each of the units 2A, 2B, 2C, . . . 2
A paint supply branch pipe 10 branched from the paint supply pipes 6, 6 (divided paint supply pipes 6A, 6A) and drawn into the booth main body 2, a regulator 11 for adjusting pressure reduction, and a color change are installed on the left and right side plates of N. The assemblies 12 are fixedly held in a concentrated state.

A hoist crane 22 is installed on the ceiling of each unit 2A, 2B, 2C...2N to lift up the robots 4, 4 as necessary and carry them out of the booth main body 2.
A running rail 23 is installed, and
Opening/closing doors 24 for carrying out the robot are provided on the left and right side plates of each unit 2A, 2B, 2C...2N, and a manhole 25 is provided at the upper end.

On both sides of each unit 2A, 2B, 2C, .

In addition, each of the units 2A, 2B, 2C...2N
As clearly shown in FIGS. 2 and 4, there are a plurality of objects (2A ₁ , 2A ₂ , 2A ₃ ...2An), (2B ₁ , 2B _2,2
B ₃ ...2Bn), (2C ₁ ,2C ₂ ,2C ₃ ...2Cn), (2
N ₁ , 2N ₂ , 2N ₃ ... 2Nn) are manufactured separately and assembled into one piece at the factory, and are also divided into upper and lower parts at a location slightly lower than the height of the filter 20 of the central outlet 1B. Although it is constructed so that it can be assembled in a factory or on-site, unlike a booth unit, this is not necessary because it makes the unit of manufacture smaller and easier to handle.

The booth main body 2 and the robot traveling unit 4
A base 3 on which maintenance scaffolds 28, 28 are installed on both sides of the U and the booth main body 2.
9 is made of concrete and will be constructed on site. A drainage gutter 2 for cleaning water discharged from the paint mist collector 15 is located at the center of the width of the concrete base 39.
9 is formed, and an exhaust passage 30 is formed that crosses the booth body 2, and an exhaust duct 31 is erected in a connected state at one end of the exhaust passage 30. In addition, at locations corresponding to the outside of both ends in the width direction of the booth body 2, there are air ducts 3 for connecting the air blow chambers 9, 9 and the air outlets 8, 8.
2 and 32 are formed, and a cable trough 3 for storing power supply cables 33 and 33 for the robots 4 and 4 is provided at an upper position within the air passages 32 and 32.
4, 34 are formed, and the cables 33, 33
By placing the product in clean, blown air, the risk of explosion and fire caused by solvents, etc. is prevented.

In the figure, numeral 35 is a hydraulic unit for driving the robots 4, 4, which is installed on one of the maintenance scaffolds 28. 36 is a robot control panel installed outside the booth main body 2, 37 is a damper provided at the inlet port 1a, and 38 is an adjustment handle thereof.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of the entire system, FIG. 2 is a perspective view of one booth unit, FIG. 3 is a longitudinal sectional front view of the system shown in FIG. 2, and FIG. 4 is a cross-sectional view of the system shown in FIG. 1... Air flow blowing device, 2... Booth main body, 2
A, 2B, 2C...2N...Unit, 3...Transfer device, 4...Painting robot, 6...Painting supply pipe,
7A, 7B...Damper, 5...Grating floor, 8A, 8B, 8C...8N...High speed air outlet, 9...Blow chamber, 10...Paint branch pipe, 11...Regulator, 12...Color change Assembly.

Claims (1)

[Scope of Claims] 1. A booth body 2 having an airflow blowing device 1 on the ceiling for creating a laminar downward airflow for discharging spray mist, and a grating floor 5 on the bottom, at or approximately the center of the bottom of the booth body 2. A conveying device 3 for placing the object A to be coated and transporting it into and out of the booth main body 2 is provided, and the booth main body corresponding to the side of the object moving path by this transport device 3 is provided. In a painting booth 2 in which a painting robot 4 is installed, the booth main body 2 is divided into a plurality of units 2A, 2B, 2C that are divided and manufactured in advance at a factory along the conveying direction of the object conveying device 3.
...2N are sequentially assembled on site, and each of the units 2A, 2B, 2C...2N is provided with a separate paint supply that is connected to each other when these units 2A, 2B, 2C...2N are assembled. A painting booth in which pipes 6A, 6B, 6C...6N are held in advance. 2. The airflow blowing device 1 is such that the height positions of the laminar downdraft air outlets 1A and 1A at both sides in the width direction of the booth main body 2 are located lower than the height position of the air outlet 1B at the central part. It is divided into both sides in the width direction and a central part so that the velocity of the airflow from the former both side outlets 1A, 1A is smaller than the velocity of the airflow from the latter central outlet 1B. In addition, those both side air outlets 1A, 1
From the common air supply chamber 1C so as to communicate with A and central air outlet 1B, respectively, both side air outlets 1A, 1
Damper 7 is installed in the air supply route to A and central outlet 1B.
A, 7A, and 7B are each provided in the painting booth according to claim 1. 3 Side plates 2a, 2b, 2 of each unit 2A, 2B, 2C...2N corresponding to a laterally outer position than the location where the robot 4 is installed at the lower part of the grating floor 5.
c...2n At the lower end, there are ports 8A, 8 that blow out high-speed airflow toward the center of the width direction of the booth body 2, respectively.
The paint booth according to claim 1, wherein B, 8C...8N are provided. 4 Said high speed airflow outlet 8A, 8B, 8C...8
N to the air supply chamber 1C of the air flow blowing device 1 and branched from the paint supply pipe 6 composed of the divided paint supply pipes 6A, 6B, 6C, . . . Paint supply branch pipe 10 to be drawn in, regulator 1
1. The painting booth according to claim 3, wherein the color change assembly 12 is collectively held at a specific location of each unit 2A, 2B, 2C...2N.