JPH0451899Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a masking device for painting, and is particularly suitable for automatically painting side sills provided along the longitudinal direction at the lower side of an automobile body. This invention relates to a masking device.

(Prior art) In general, the side sills of automobiles are painted separately from other parts to protect the car body from flying stones and rust while driving, for example, with vinyl chloride paint, etc., applied a little thicker than other parts. There is a need.

When automatically spray painting the above vinyl chloride paint etc. on the side sills with a paint gun, generally only the side sills are covered by masking the non-painted parts using a masking device such as the one proposed in the previous application (Utility Application No. 58-31298). I'm trying to paint it.

The above-mentioned masking device has a gate-shaped hanger attached to a fixed frame so that it can reciprocate along the moving direction of the vehicle body, plate support frames attached to the lower ends of both sides of the gate-shaped hanger so as to be movable up and down, and each plate support frame Each masking plate is connected to the vehicle body via a parallel link so as to be movable forward and backward, and positioning means are provided at both ends of each masking plate, and the forward and backward movement of the positioning means causes the masking plate to approach a predetermined position on the side of the side sill, thereby masking. The masking plate is moved as the vehicle body moves while the plate masks the non-painted parts.

The side sills are then automatically painted while the paint gun is moved in the longitudinal direction of the vehicle.

(Problem to be solved by the invention) When painting the side sills by masking the non-painted parts using the above masking device, the masking plate is used to apply to many types of car bodies, so it is necessary to Due to this, it is difficult to make the entire masking plate adhere completely to any car body, creating a space between the masking plate and the car body, and when spraying low viscosity paint with a paint gun, even vinyl chloride paint, the discharge The problem is that the remaining particles become fine, and the fine particles scatter from the above space to the non-painted area, making the painting boundary line unclear, staining the non-painted area, and adversely affecting the finish of the subsequent top coat. There is.

As a countermeasure, Japanese Utility Model Application Publication No. 59-20865 states:
An air seal painting mask has been proposed in which a painting mask that covers an unpainted part of a part to be painted is provided with an air supply path whose opening faces the gap between the painting mask and the part to be painted.

However, this air seal painting mask is configured to eject air over the entire length of the gap between the painting mask and the parts to be painted, so the air consumption is very high when painting large parts. There are problems such as increased running costs and complicated structure of the coating mask.

(Means for Solving the Problems) The painting masking device according to the present invention is a painting masking device that covers the car body part above the side sill with a masking plate when painting the side sill of the car body with a paint gun. An air blowing means for introducing air from above into the space between the masking plate and the painting gun is provided integrally on the painting gun side so as to be located above the painting gun, and the painting gun and the air blowing means are arranged in the longitudinal direction of the vehicle body. , a moving drive means is provided for moving and driving the masking plate so as to move relative to the vehicle body and the masking plate.

(Function) In the painting masking device according to the present invention, when painting the side sill of a car body with a paint gun, the part of the car body above the side sill is covered with a masking plate, and the masking plate is placed on the side of the paint gun so that it is located above the paint gun. The integrally provided air blowing means introduces air from above into the space between the car body and the masking plate, and the moving drive means moves the painting gun and the air blowing means in the longitudinal direction of the car body to the space between the car body and the masking plate. Painting is performed by moving relative to the object.

The air introduced from above into the space between the car body and the masking plate by the air blowing means blows out from the lower end of the masking plate, so that fine particles of paint ejected from the paint gun flow into the space. It does not adhere to unpainted parts of the car body.

(Effect of the invention) According to the masking device for painting according to the invention,
An air blowing means for introducing air from above into the space between the car body and the masking plate is integrally provided on the painting gun side, and the painting gun and the air blowing means are moved in the longitudinal direction of the car body and masking by a moving drive means. Since the coating is configured to be applied while moving relative to the plate, the following effects can be obtained.

Air from the air blowing means is always introduced from above into the space near the spray painting area as the painting gun moves, so air can be reliably supplied only to the necessary areas, ensuring efficient air usage without wasting air. It is possible to reduce the amount of air consumed because it can be used as Effects such as being able to eliminate adverse effects on the top coat and not complicating the structure of the masking plate due to air supply can be obtained.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

The masking device for painting of the present invention, when painting the side sill at the lower side of the car body shown in Fig. 4, masks the non-painted part with a masking plate, and when spray painting the side sill with a paint gun, the masking device Blow air is blown diagonally above the plate into the space between the masking plate and the vehicle body to prevent paint particles from scattering to the non-painted area above the side sill.

In order to clarify the following explanation,
The direction indicates the direction of movement of the vehicle and is forward, and Y
Define the direction as left.

The masking mechanism 1 includes a pair of horizontal beams 2 extending in the left-right direction at a predetermined interval in the front-rear direction;
A column 3 is provided vertically to support both left and right ends of the pair of horizontal beams 2, and a front surface is provided perpendicularly to each horizontal beam 2 at approximately the center in the length direction of the pair of horizontal beams 2. It basically consists of a pair of gate-shaped hangers 4 that are gate-shaped in view, and a pair of left and right plate support frames 5 and a masking plate 16 that are supported by the lower part of the gate-shaped hangers 4 and extend in the front-rear direction.

Since the pair of plate support frames 5 are symmetrical, the left plate support frame 5 will be explained.

The plate support frame 5 is composed of links 6 and 7 that extend in the front and rear directions at a predetermined interval in the vertical direction, and a fixed plate 8 that is fixed to both the front and rear ends of the links 6 and 7. The slit 4a is inserted into the lower part of the gate-shaped hanger 4 and is vertically long and formed in the front-rear direction.

An elevating cylinder 10 is fixed to the bracket 9 of the portal hanger 4 in the vertical direction, and the elevating cylinder 10
The tip of the piston rod 11 is fixed to the center of the upper link 6, and the lift cylinder 10 is actuated by hydraulic pressure from a hydraulic power source not shown, so that the plate support frame 5 can rise or fall within the slit 4a. It's getting old.

A hydraulic cylinder 12 and a pair of guide rods 13 located on both the front and rear sides of the cylinder 12 are attached to each of the pair of fixed plates 8 at the front and rear of the plate support frame 5 in the left-right direction, and the piston rod 11 and guide rod 13 of the cylinder 12 are inserted through the fixed plate 8, and a roller support plate 14 facing the fixed plate 8 is fixed to the tips of the piston rod 11 and the guide rod 13.

Four guide rollers 15 are attached to the inner surface of each of the roller support plates 14 so as to be rotatable about their rotating shafts in the front-back direction, and a masking plate 16 is attached to the inner surface of each roller support plate 14.
is attached to the lower end of the roller support plate 14 via a support member 17.

The masking plate 16 is made of synthetic resin or hard rubber, is longer than the length of the side sill 26 in the longitudinal direction of the vehicle, and has a width similar to that of the painting gun 2.
The width of the side sill 26 is approximately 2 to 3 times sufficient to mask the spray paint when spray painting is performed in step 3, and the lower side of the middle sill is slightly curved inward, so that the masking plate 16 is located at the painting position. Its lower end is close to the vehicle body when

By operating the cylinder 12 with hydraulic pressure supplied from a hydraulic supply source not shown, the roller support plate 14, that is, the masking plate 16, can be moved to the right (painting position) or left (retreat position). There is.

Next, the coating devices 18 are provided between each of the plate support frames 5 and the columns 3 on the outside thereof, and since the pair of left and right coating devices 18 are symmetrical, the left coating device 18 will be explained.

The coating device 18 includes an air motor 19, a bed 20,
It basically includes a carriage 21, a wire (not shown) for driving the carriage 21, a support rod 22, a coating gun 23, a paint and air supply system (not shown), and the like.

The air motor 19 is disposed on the floor near the rear end of the masking plate 16, and a bed 20 that is slightly longer than the length of the masking plate 16 is disposed forward from the air motor 19 in parallel with the masking plate 16. Two rails 24 are attached in parallel to each other.

A carriage 21 is placed on the upper surface of the bed 20 so as to be movable on a rail 24, and a support rod 22 of an appropriate length has its lower end fixed to the upper surface of the carriage 21 and extends vertically upward. .

A drum whose wire is driven by an air motor 19 and a pulley (not shown) provided at the front end of the bed 20
The carriage 21 is attached to one point on the wire, and the air motor 1
The carriage 21 is reciprocated back and forth on the rail 24 by rotating the shaft 9 forward or backward.

Furthermore, the painting gun 23 is connected to the masking plate 1.
6 to the painting position and when painting, the second
As shown in FIG. 3 and FIG.
It is attached to the support rod 22 via 7.

As shown in FIGS. 1 to 3, the air nozzle 28 supplies air from diagonally above the masking plate 16 to the masking plate 16 and the vehicle body 2 when the masking plate 16 is set at the painting position and painting is performed.
It is attached to the support rod 22 via a mounting block 27 so that air can be ejected into the gap between the air supply and the air supply 9, and air supplied from an air supply system (not shown) is ejected.

Next, the operation when painting the side sill 26 with the painting gun 23 while jetting air from the air nozzle 28 will be explained.

The vehicle body 29 placed on a conveyor table (not shown) is transported by a conveyor (not shown) and stopped at a predetermined position where it can be painted.

Then, the four cylinders 12 attached to the left and right plate support frames 5 operate simultaneously, and when each roller support plate 14 moves toward the vehicle body 29, the masking plate 16 moves toward the vehicle body 29 via the support member 17.
9 side (see Fig. 2), and guide roller 15.
The operation of the cylinder 12 is stopped at the position where the masking plate 16 contacts the vehicle body 29 (the lower end of the masking plate 16 is close to the vehicle body 29).

When the left and right lifting cylinders 10 are activated simultaneously, the plate support frame 5 rises while each guide roller 15 comes into contact with the side surface of the vehicle body 29, and the lower end of the masking plate 16 is positioned at the upper end of the side sill 26. ), the operation of the lifting cylinder 10 is stopped.

Next, by operating the air motor 19, the carriage 21 is first moved to a position near the rear end of the side sill 26 (painting start position), and painting of the side sill 26 is started.

As shown in FIGS. 2 and 3, the painting gun 23
Simultaneously with the start of spraying the paint, the air nozzle 28 starts blowing out air, and at the same time, the air motor 19 is operated to move the carriage 21 forward at a predetermined speed.

The paint used for painting the side sill 26 is vinyl chloride paint or urethane paint, but especially when the viscosity is low like urethane paint, the paint gun 2
In step 3, the particles after ejection become fine and the paint mist is scattered.

At this time, as shown in Fig. 3, the air nozzle 2
Air blown out from masking plate 16
Since the paint mist is sprayed downward through the gap between the paint gun 23 and the vehicle body 29, the paint mist that is sprayed and scattered by the paint gun 23 also moves downward, and the mist hits the non-stick area above the side sill 26. Only the side sill 26 is painted without adhesion to the painted part, and the painted boundary line of the side sill 26 is clearly formed.

Moreover, since the air nozzle 28 and the coating gun 23 are integrally attached to the support rod 22, the carriage 21 moves forward at a predetermined speed while maintaining the above-mentioned coating condition (the coating condition shown in FIG. 3). However, the entire length of the side sill 26 will be painted (see FIG. 4).

When the painting of the side sills 26 is completed, the pair of lifting cylinders 10 and the four cylinders 12 return to their original positions (non-painting positions), and the vehicle body 29 is moved to the next process by the conveyor.

Incidentally, if necessary, the side sill 26 may be painted by moving the carriage 21 back and forth once.

Reference numeral 30 denotes a control panel, and the control of the plate support frame 5, roller support plate 14, and other components is automatically controlled by various limit switches and sensors (not shown) in accordance with various types of vehicles.

Note that this embodiment is an embodiment to which the present invention is applied, and in short, it is sufficient to prevent paint particles from adhering to non-painted areas with the air ejected from the air nozzle 28. It may also be integrally attached to the painting gun 23 side.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention. Fig. 1 is a perspective view of the masking device for painting, Fig. 2 is a rear view of the side sill being painted, and Fig. 3 is a diagram showing the state of painting while blowing out air from an air nozzle. An explanatory diagram showing the state, FIG. 4 is a schematic side view of the vehicle body showing side sill painting. DESCRIPTION OF SYMBOLS 1... Masking mechanism, 5... Plate support frame, 16... Masking plate, 18... Painting device, 19... Air motor, 21... Carriage, 22... Support rod, 23... Painting gun, 26...
...side sill.

Claims (1)

[Scope of claim for utility model registration] In a painting masking device that covers the part of the car body above the side sill with a masking plate when painting the side sill of the car body with a paint gun, air is supplied from above into the space between the car body and the masking plate. The air blowing means to be introduced is integrally provided on the painting gun side so as to be located above the painting gun, and the painting gun and the air blowing means are moved in the length direction of the car body relative to the car body and the masking plate. A masking device for painting, characterized in that a moving drive means for moving the masking device is provided.