JPS59156457A - Painting booth - Google Patents

Abstract

PURPOSE:To reduce the supply amount of an air stream while sufficiently performing mist exhaustion, in a painting booth in which a robot is arranged, by differentiating the height of the blowing port and the air stream blowing speed of an air stream blowing apparatus in the lateral sides and the central part of said booth. CONSTITUTION:An air stream blowing apparatus 1 is equipped with an air supply chamber 1A in the ceiling uppermost part of a painting booth 2 and forms blowing ports 4A, 4B of laminar falling air streams in the both lateral parts and the central part in the traverse width direction in the booth in such a state that the side of the central part is positioned at a higher place. In addition, dampers 5A, 5B are provided to air sending passages from the air supply chamber 1A to the blowing ports 4A, 4B and the opening degrees of these dampers 5A, 5B are regulated so as to set the air stream blowing speeds from both side blowing ports 4A to 0.2-0.3m/s and the air stream blowing speed from the central blowing port 4B to about 0.4m/s. As a result, the exhausting action of sprayed mist is effectively performed without accompanying a vortex stream.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is particularly useful in painting work for large and complex objects such as automobile bodies, by saving labor in painting work, freeing workers from harsh environments, and improving productivity. This is a painting booth with a painting robot equipped with an articulated manipulator installed inside the booth in order to improve quality and quality. A conveyance device is installed at or approximately the center of the bottom of the booth in which the object to be coated is placed and moved in and out. The present invention relates to a painting booth in which painting robots are installed on each side of the booth in the width direction.

[jrJIn a typical painting booth, the worker is configured to assist the operator with the spray gun from the side of the movement path of the object to be coated in the painting booth, without using a robot like the one described above. Since it is sufficient to have enough work space in the booth for the worker to move freely around the object to be coated, the required width of the booth is much smaller than that of the above structure in which robots are installed on both sides. In the case of a hand-spraying work booth with a small width like this, from the work environment, in other words, in order to prevent spray mistakes from hitting the worker as much as possible, the air blowing device described above should be used to blow air into the booth. The velocity of the laminar downdraft to be emitted is set to be relatively uniform and relatively large over the entire width of the booth (0, grn/S ~ o, gm/s 1
1 time) K. However, in a booth with the above configuration in which robots are installed, it is difficult to install robots on both sides of the object moving path. The width of the booth becomes very large depending on the space, and in the case of a booth with such a wide width, the spray mist generation area is concentrated in the center of the booth, and the amount of spray mist generated on both the left and right sides of the booth is small. It is.

Despite the above circumstances, conventional painting booths equipped with robots were configured to blow air almost uniformly across the width of the booth at a relatively high speed. The total amount of airflow supplied into the booth increased by an amount equivalent to the increase in booth width, leading to an increase in winter heating load and an increase in air supply power, resulting in an unnecessary increase in equipment costs and operating costs.

In the case of a wide booth in which a robot is installed, the amount of spray mist generated on both the left and right sides of the booth is small, and the spray mist can be sufficiently discharged even at a speed lower than the required airflow velocity in the center. The purpose is to reduce the total amount of airflow supplied into the booth as much as possible, thereby reducing equipment costs and operating costs.

The characteristic configuration of the painting booth according to the present invention developed to achieve the above object is that the airflow blowing: The height position of the air outlet is located lower than the height position of the air outlet at the central part, and the airflow velocity from the airflow outlets on both sides of the bend is smaller than the airflow velocity from the central airflow outlet. As shown in FIG.

In other words, instead of configuring the airflow blowing device so as to create a descending airflow with a relatively high velocity that is almost uniform over the entire width of the booth, it is configured to create a descending airflow with a relatively high flow rate that is almost uniform across the entire width of the booth, but instead of configuring the airflow blowing device to create a descending airflow with a relatively high velocity that is almost uniform across the entire width of the booth. Therefore, in the central area where a large amount of spray mist is generated, a descending airflow with a high velocity is applied almost uniformly to prevent the accumulation of spray mist, and on the left and right sides where a small amount of spray mist is generated, it is possible to create a sufficient range of velocity to discharge the small amount of spray mist. In order to create a descending airflow with as low speed as possible, the middle part and both sides are constructed by combining functionally independent parts, so that the booth width increases as the robot is installed. Nevertheless, the total amount of airflow supplied into the booth can be suppressed to less than the amount corresponding to the increase in the width of the booth. Moreover, by not only changing the 'A flow velocity between the central part and both sides, but also by making a difference in the height of the air outlet in both parts, it is possible to Reduced effective spray mist discharge area in the center due to airflow turbulence, especially when the high velocity airflow in the center entrains the small velocity airflow on both sides and generates a vortex near the boundary. It is possible to suppress the

By multiplying the above action to the f1 power, an appropriate, reliable, and sufficient spray mist discharge action can be performed over the entire width of the booth.
By reducing the total amount of airflow supplied into the booth as much as possible, reducing the required air supply power and downsizing the air supply device, it has become possible to reduce the overall installation and operating costs. .

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

In Fig. 1, (2) is a painting booth, and a device il+ is installed above the painting booth (2) to form a laminar airflow for discharging spray mist in the painting booth (2). In addition, at the bottom of the booth (2),
The entire surface grating floor (6) 'c
A water plate (7) with a gentle slope is used as a device to collect the paint mist collected by water with a film of water.
Washing water outflow header (8), paint mist collector (9)
At approximately the center of the width of the entire surface grating floor (6), there is a trolley (10) on which the object to be coated, such as an automobile body, is placed, and the trolley (10) is driven to move and stop moving. Flexible pusher set chain conveyor (Hu) (!: Conveyor device (12) that automatically moves the object to be coated into and out of the booth (2)
is provided. The painting booths (2) correspond to both left and right sides of the moving path of the object to be coated by this conveyance device (12).
A first underframe (3) is mounted on each side of the inner frame in the width direction, and is movably transferred onto a rail (3A) laid on the grating floor (6) along the moving direction of the cart (lO).
B), a second underframe (3C) which is freely moved and transferred on this first underframe (3B) in a direction perpendicular or almost perpendicular to the above-mentioned traveling direction, and this second underframe (3C). Underframe (3C
It consists of a swivel table (3D) mounted and supported on a swivel table (3D), an anti-sabotage arm (3E), a 7-reflex arm (3F), and a spray gun (3G), and is controlled by a microcomputer to ensure high-precision trajectory reproducibility. Equipped with robots +31 and +31, each consisting of a manipulator having a

In the robot-equipped painting booth configured as described above, the airflow Suita device il+ is configured as follows.

This booth (2) is installed at the top of the ceiling of the painting booth (2).
) of one air supply chamber (IA
) is formed, and an inlet (1a) for conditioned air or outside air sent by a blower (not shown) is provided at the center of the width of the air supply chamber (IA). Near both ends in the width direction, there are partition walls (2a) facing the left and right side walls (2a) of the booth (2).
131, 03) are vertically installed from the lower wall (lb) of the air supply chamber (IA), and these spacers Oat, +13
) and the left and right side walls (2a) of the booth (2) facing each
, (2a) are provided with filters H and H, respectively, at the lower end of the downward air supply path formed between the two partition walls ++3) at a higher position than these filters 114) and [14). , (Filter for 1 hour (
15] are stretched, and the laminar downdraft air outlet (4A), ( 4A)
and (4B) are formed. Then, from the air supply chamber (IA) to the both side outlet ports (4A), (4A
) and the air supply route from the air supply chamber (LA) to the central outlet (4B) are arranged in parallel at the same or almost the same height level. , (
5A) and (5B), and by adjusting the opening degrees of these dampers (5A), (5A), and (5B), the air flow velocity blown from the both side outlet ports (4A) and (4A) can be adjusted to 0. 2~0.3m/S, central air outlet (4B
) The airflow velocity from the air is approximately 0. The configuration should preferably be D, , /S.

Further, at the bottom of the entire surface grating floor (6) and outside both widthwise ends of the booth (2), high-speed airflow of jm/S~/om/Q@ is blown toward the center of the booth (2). By this, there are air outlets (4A) and (4A) on both sides.
) A low-velocity descending airflow containing a small amount of paint mist is ejected from the robot +3+, and the narrow 'J! ! A ventilation chamber (LA) with a slit-type outlet (14A), (14A) so as to draw suction under the grating floor (6) through the
), (LA) are provided, and these ventilation chambers (14), (14) are connected to the duct (17).
, are connected to the air supply chamber (IA) through the same.

In the figure, (16A), (16A) and (16B) are Bang filters.

In general, when a passenger car is the object to be coated, the standard dimensions of each part are as follows.

Both side outlet (4A), width of (4A) (W,) - t, o
oo~/, , SOOtrtm Central air outlet (4B)
Part width (W,) -3, ooo ~ da, 0θO 醋 Both sides air outlet (4A), height of (4A) )I,) -,2
,joo ~ 3,00θ The height of the central outlet (4B) is -600θ. Independence [2
It is also possible to set it up individually.

Figure 3 shows the airflow blowing device. Another embodiment of 111+ is shown, in which the bung filters to the both side Suita outlets (4A), (4A) and the central outlet (4B) are connected to the central Suita outlet (4B).
), so that each damper (5A), (5A) and (5B
) is configured 17 with a difference in height.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the coating ψ booth operated by the present invention, in which FIG. 1 is a schematic vertical cross-sectional view, FIG. 2 is a cross-sectional view taken along the line ■-n in FIG. 1, and FIG. FIG. 7 is a vertical cross-sectional view of main parts showing another embodiment. (1)...Airflow blowing device, +21...
Booth, (12)... Conveyance device, (3)...
...Painting robot l-1 (4A), (4B)...
・Air outlet, (5A), (5B)... Damper, (
Aiki Chamber in LA)...

Claims (1)

[Claims] ■ The object to be coated (A+ is placed at or approximately at the center of the bottom of a booth (2) which has an air blower tl+ at the top for creating a laminar downward airflow for discharging spray mist. A conveying device 02) is provided for carrying in and moving the object to be coated, and both sides in the width direction within the booth (2) correspond to the left and right sides of the moving path of the object to be coated by this conveying device (12). A painting booth in which painting robots +3+ and +3+ are installed in dogs, and the airflow Suita device +1
), the height position of the laminar descending air outlet (4A) on both sides in the width direction in the booth (2) is higher than the height of the outlet (4B) in the center. so that it is located low, and the former both side air outlets (4A), (4A)
The painting booth is divided into two sides in the width direction and a central part so that the velocity of the air blown from the central outlet (4B) is smaller than the velocity of the air blown from the central outlet (4B). ■ Air supply chamber (I) of RfJ air flow blowing device (1)
A) communicates with the both side air outlets (4A), (4A) and the central air outlet (4B). and the shared air supply channel, < - (LA)
Gumper (5A), (
5A) and (5B), respectively. The paint booth according to claim 0. ■ The airflow velocity from the central outlet (4B) is F.
The painting booth according to claim 0, wherein the paint booth is JO-Kinnai and the airflow speeds blown from both side outlet ports (4A) and (4A) are O1, 2~o, i-:/S.