JPH0278457A - Gondola for painting provided with repulsing plate and automatic outside wall painting method using this gondola - Google Patents

Abstract

PURPOSE:To efficiently and automatically paint the outside walls of a building by providing a movable gondola, spray guns, hood-like repulsing plates which cover at least the tip parts of the spray gun and are opened to the side of an object to be coated and high voltage generators. CONSTITUTION:The gondola A, the electrostatic spray guns 3, and the hood-like repulsing plate 6 which covers at least the tip parts of the spray gun 3, is opened to the side of the object to be coated, and is supported by insulated supports 9 are provided. Further, the high voltage generators 16, 17 which impress high voltages to the spray guns 3 and the repulsing plate 6 with the object to be coated (wall body) as a ground side are disposed. The generators 16, 17 are then energized to impress the high voltages to the spray guns 3 and the repulsing plate 6. Paint is sprayed to the wall body via the spray guns 3 when a paint pump 15 is operated after the voltage impression. Such spraying is executed by movement of the gondola A along the wall body. The flying force of the paint particles to the grounded wall surface of a positive potential is increased by the repulsing plate 6 electrified negative like the paint; in addition, the sticking of the point to the inside surface of the repulsing plate 6 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a painting gondola provided with a repulsion plate and an automatic exterior wall painting method using the same. More specifically, we will introduce a painting gondola equipped with a repulsion plate that can reduce the weight of the equipment, simplify maintenance, significantly improve painting efficiency, and shorten the construction period, and an automatic exterior wall painting method using the same. Regarding.

[Conventional technology] Conventionally, when painting the exterior walls of large-scale buildings such as factory buildings, gymnasiums, and warehouses, a gondola loaded with painting equipment is hung from a crane installed on the roof of the building, and a gondola is installed inside the gondola. Automatic spray painting is carried out using spray paint. In this case, a booth is installed that encloses the entire gondola or the nozzle part of the spray to prevent paint particles from flying off.

[Problems to be Solved by the Invention] However, when such a booth is used, the interior of the booth is filled with paint particles, and a large amount of paint adheres to the inner surface of the booth, reducing the coating effect. Furthermore, since the booth itself has poor airtightness, paint particles inevitably leak outside through the gaps.

Therefore, in order to reduce the amount of paint adhering to the inside of the booth and at the same time prevent paint from leaking from the booth, the air inside the booth is sucked and exhausted through a filter. , the filters became clogged, requiring frequent replacement, and complicated maintenance such as cleaning the inside of the booth was required.

In particular, when using an electrostatic coating method, which has better coating efficiency than the airless spray method, the amount of paint that adheres to the inside of the booth becomes excessive, so it is not recommended to use the electrostatic coating method for outdoor painting. It was impossible.

The present invention has been made in view of the above-mentioned circumstances, and provides a painting gondola and a painting gondola that can extremely effectively automatically paint the exterior walls of buildings without using equipment that requires complicated maintenance such as booths or suction devices. The purpose of the present invention is to provide an exterior wall painting method using the method.

[Means for Solving the Problems] The painting gondola provided with the repulsion plate of the present invention includes a gondola movable along the object to be coated, a spray gun mounted on the gondola, and at least the tip of the spray gun. A hood-shaped repulsion plate made of stainless steel, aluminum, galvanized steel plate, carbon fiber-reinforced conductive plastic, etc. that covers the area and is open to the side of the object to be coated, and for applying high voltage to the spray gun and the hood-shaped repulsion plate. It is characterized by having a high voltage generator. Further, the automatic exterior wall painting method of the present invention uses a gondola that can move along the object to be painted.
A spray gun and a hood-shaped repulsion plate that covers at least the tip of the spray gun and is open to the object to be coated are provided, the object to be coated is on the ground side, and a high voltage is applied to the spray gun and the repulsion plate to discharge. It is characterized by charging the paint and automatically painting the exterior wall using the potential difference between the discharged paint and the object to be painted.

In this way, in the present invention, a hood-shaped repulsion plate that can apply a voltage almost equivalent to the voltage applied to the gun to the tip of an electrostatic spray gun is used to generate insulating repulsion without contacting the spray gun. It is distinctive in that it is attached with a board support.

[Function] In the present invention, a high voltage is applied to the spray gun and the hood-shaped repulsion plate provided at the tip of the spray gun. Paint particles that are negatively charged by the spray nozzle are
Although it flies toward a grounded, positive-potential wall, its flying force is increased by the action of a negatively charged repulsion plate, similar to a spray gun, so that the efficiency of coating the wall surface is improved. Furthermore, since the same negative voltage as that applied to the paint particles is applied to the repulsion plate, paint particles do not adhere to the inner surface of the repulsion plate.

[Example] Next, a painting gondola equipped with a repulsion plate of the present invention and an automatic exterior wall painting method using the same will be described in detail based on the drawings.

FIG. 1 is a front view of an embodiment of the painting gondola of the present invention;
FIG. 2 is a right side view of the embodiment shown in FIG.

In FIG. 1, (A) is a gondola for painting. (1
) is a frame made of molten galvanized steel, stainless steel, aluminum, etc., and is suspended by a suspension rope (2) that also serves as a ground and extends from a winch installed on the roof of the building. (3) is a commonly used electrostatic spray gun, which is fixed to a gun support (5) insulated by an insulator (4) such as an insulator. The number of electrostatic spray guns (3) is not particularly limited in the present invention, and the mounting angle thereof may be appropriately selected depending on the shape of the wall surface.

At the tip of the electrostatic spray gun (3), there is a hood-shaped repulsion plate () for applying repulsion to the paint particles ejected from the nozzle of the spray gun (3) and increasing the flight force toward the wall surface.
6) is provided. The hood-shaped repulsion plate (6) is made of stainless steel, aluminum galvanized steel plate, carbon fiber-reinforced conductive plastic, etc., and has an open structure on the wall side, and has a hole (8) formed in the back plate ('7). The tip of the spray gun (3) is inserted through it. Repulsion board (6
) is supported by an insulating support (9). η is a paint reservoir formed at the lower end of the wall side of the repulsion plate (6).

The former) is a paint tank, which is installed on the frame (1) via an insulating stand a2). The paint stirred by the stirrer attached to the tank 01) is sucked into the paint pump via the hose (14), pumped up, and sent to the spray gun (3).

ΩGS (171 is a high voltage generator for applying high voltage to the spray gun (3) and repulsion plate (6), respectively. Single-phase alternating current fi (100V) supplied to the voltage stabilizer (to) through the power cord or 200 V) is sent to the high voltage generator 'JS=CIe, U)) via the wire mark. Here, it is converted to a high voltage (6 to 12 KV) and is energized to the spray gun (3) and the repulsion plate (6) through the high voltage cable (1) and the ring. Note that this is the ground wire.

3 and 4 are explanatory diagrams of the use state of the painting gondola shown in FIGS. 1 and 2.

A grounding rail t24 is laid on the roof of the building, and a crane h is mounted on the rail t24.

The earthing/suspension lobe (2) is connected to a winch installed at the rear of the crane via a guide attached to the tip of the crane power arm. By winding up or lowering the rope (2) using this winch, the painting gondola (A) can be moved up and down along the wall surface. ■ is frame (1)
These are guide wheels made of insulating material that are fixedly installed above and below the left and right ends of the vehicle. When the wall (V) is composed of folded metal plates, using such guide wheels allows the painting gondola (A) to be moved up and down in close contact with the wall.

Next, a method for painting an exterior wall using the above-mentioned apparatus will be specifically explained.

First, energize the voltage stabilizer with single-phase alternating current (100V or 200V) through the power cord OB.

Next, from the voltage stabilizer 09 to the high voltage generator (g), 07)
energize to generate a high voltage of 6 to 12 KV.

Then, a current of usually 60 KV is applied to the electrostatic spray gun (3) and the repulsion plate (6) through the gun high voltage cable (1) and the repulsion plate high voltage cable (2V).

After applying the voltage, paint pump b is activated. The paint is sent to the electrostatic spray gun (3) via the hose 04).

After that, activate the crane-powered winch installed on the roof. When the painting direction is downward with respect to the wall (W), the winch surface is operated in a lowered state, and when it is upward, the winch is operated in a rolled up state.

FIG. 4 is an explanatory diagram of an embodiment of the painting process using the painting gondola of the present invention. Paint is applied downwards (toward the ground) from the top of the wall (ν), and when the painting gondola (A) reaches the bottom of the wall (W), the winch surface automatically stops, and at the same time, Paint spraying will also stop. The arrival of the painting gondola (A) at the lowest end is detected by commonly used means such as a limit switch, a proximity switch, a phototube, a yard meter, etc.

Next, extend the arm (to) and install the painting gondola (A
) is raised by an appropriate distance from the wall (ν), and then the crane force is applied horizontally on the ground rail Q4, as shown by the arrow (P) in Figure 3, twice as far as the distance being painted. move it to

Then, pull in the arm ■ and hold the guide wheel captive (ν
) and operate winch 0 in the winding direction and at the same time start spraying, this time painting towards the upper part of the wall.

When the painting gondola (A) reaches a predetermined position at the top of the wall, the winch and sprayer are simultaneously stopped in the same manner as described above. After extending the arm and lifting the guide wheel ■ above the wall (W), move the crane 4 horizontally by twice the painting width (move it in the direction shown by the arrow (Q) in Figure 3), and then Retract the guide wheel and place it against the wall (If)
Paint downwards in close contact with the surface.

In the above explanation, the reason why the crane carrier is moved laterally by twice the painting width is to prevent the undried coating film from being scratched by contact with the guide wheel carrier after the coating is placed.

Then, after painting the - side of the wall (ν) intermittently, the unpainted parts of the same side are painted in the same manner, and the wall (W
) to complete the entire surface.

[Effects of the Invention] As is clear from the above description, according to the coating gondola and coating method of the present invention, a repulsion plate is provided at the tip of the electrostatic spray gun to apply approximately the same voltage as the gun. Therefore, the flight of paint particles to the grounded wall surface is increased, and paint is prevented from adhering to the inner surface of the repulsion plate.

Therefore, a mist (spray paint particle) discharge device is not required, the device can be made lighter and simpler, and complicated maintenance can be omitted. In addition, since almost all of the sprayed paint is applied to the wall, the effectiveness of the application is greatly improved, which has the effect of significantly shortening the construction period.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the painting gondola of the present invention;
Figure 2 is a right side view of the gondola shown in Figure 1;
FIG. 4 is an explanatory diagram of the use state of the painting gondola shown in FIGS. 1 and 2. (Main symbols in the drawing) (A), Painting gondola (1): Frame (3); Electrostatic spray gun (6) Double repulsive slab: Paint pump 0■, 07): High voltage generator (1g: Voltage Stabilizer A Painting Gondola Sai l111
Frame 2nd picture 3rd picture 4th

Claims (1)

[Scope of Claims] 1. A gondola movable along the object to be painted, a spray gun mounted on the gondola, and a hood-shaped repulsion plate that covers at least the tip of the spray gun and is open to the object to be painted. and a gondola for painting equipped with a repulsion plate, characterized in that it has a high voltage generator for applying a high voltage to the spray gun and the hood-shaped repulsion plate. 2 A gondola movable along the object to be painted is equipped with a spray gun and a hood-shaped repulsion plate that covers at least the tip of the spray gun and is open to the object to be painted, and the object to be painted is on the ground side and the spray An automatic exterior wall painting method characterized by applying a high voltage to a gun and a repulsion plate to charge the discharged paint, and automatically painting the exterior wall using the potential difference between the discharged paint and the object to be painted.