JPS5844031B2 - paint spraying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paint spraying device for supplying paint mist to an object to be painted in electrostatic painting or the like.

In electrostatic painting, the object to be painted is generally transported by a conveyor and the paint is sprayed at a location installed near the conveyor path, and the paint is attracted to the object by the electrostatic charge applied between the object to be painted and the spray. Let them wear it.

In this case, since the spraying range of the spray gun is naturally limited, a device called a reciprocating device is used to spray while swinging up and down to accommodate long objects to be coated.

That is, the object to be coated moves horizontally in the horizontal direction, and the spray gun swings in the vertical direction to supply spray to the entire surface of the object to be coated.

However, in practice, the surface to be coated is often not flat but three-dimensional, and the object to be coated is often passed through the spray area without being rotated.

In this case, unless the object to be painted is rotated once between the width of the spray, an unpainted area will remain.

In this case, it is necessary to reduce the conveyor speed.

However, it is not possible to change the conveyor speed each time depending on the size of the object to be coated.

If necessary, manual spraying work is required to make corrections in later processes), but currently multiple spray guns and reciprocating devices are installed in parallel to reduce manual spraying work as necessary. be.

This is not a good idea in terms of productivity and equipment costs. In view of the current situation, the present invention incorporates a mechanism that moves the spray gun horizontally to widen the width of the spray, thereby eliminating any unpainted areas and allowing the painting process to be carried out using only a small amount of equipment. The present invention provides a paint spraying device that is possible at a low cost.

The figure will be explained in detail below.

First, a guide rail 1°1 is laid parallel to the conveyor line in the painting process in which the object to be painted is transported while rotating, and a platform 3 is guided on the rail and moved by small wheels 2.2.
Equipped with.

An electric motor 4 is mounted on the base plate 3, and a support 5 is also established.

At the top of the column 5, the base end of a swinging arm 6°6' facing the direction of the conveyor line at right angles to the guide rail 1.1 is pivoted so as to be able to swing up and down, and the front end is attached to the upper and lower ends of the connecting rod γ. It is pivoted to form a four-bar parallel link mechanism.

A spray gun 8 is removably mounted on the connecting rod 7 toward the conveyor line.

- The blade type motor 4 is equipped with a crank 10 on the output shaft 9 which is decelerated.

A rod 1 connects the end of this crank 10 with one 6" of the above-mentioned swinging arm.
Pivotally connect both ends of 1.

The effective length of the connecting portion 1P with the swinging arm 6' can be adjusted using a long hole 12 or the like.

The above is one of the devices called a reciprocating device, and the electric motor 4
By driving the spray gun 8, the spray gun 8 is caused to swing up and down with a required stroke.

Next, a cylinder 13 is installed parallel to the guide rails 1, 1, and the tip 14' of a piston rod 14 extending from a piston that reciprocates inside the cylinder 13 is connected to the - portion 3' of the base plate 3.

Hydraulic pressure or air is alternately introduced into the cylinder 13 on both sides of the piston to cause the piston and piston rod 14 to reciprocate, so that the base plate 3 carries the reciprocating device and reciprocates on the guide rail 1.1. .

The reciprocating switching operation is controlled by solenoid valves 15, 16 and limit switches 17, 18 which engage the base.

By adjusting the positions of the limit switches 11° and 18, the stroke width and position can be freely set.

You can also change the forward and backward speeds.

This reciprocating motion of the base plate 3 may be achieved by installing a chain driven by a forward/reverse motor in addition to the cylinder device in parallel with the guide rail 1.1, and coupling the chain to the base plate 3.

In this way, the spray gun 8 reciprocates in the horizontal direction while swinging up and down, and the spray is supplied to a wide area expanded vertically and horizontally, so that the paint can be completely coated on the entire surface of the rotating object 19. (see figure).

As mentioned above, the paint spraying device of the present invention moves the spray gun back and forth along the conveyor line in addition to the conventional vertical swing, so the spraying range is expanded and the spray gun can be effectively sprayed onto the object to be painted. We can supply paint.

By adjusting the stroke of the lateral movement depending on the size of the rotating object to be coated, it is possible to coat the entire three-dimensional surface of the object without waste and leakage, and the correction work in the post-process can be greatly reduced.

The forward stroke of the lateral movement is approximately synchronized with the conveyor speed, and the backward stroke can be returned quickly to further increase efficiency.

Since the conventional reciprocating device is placed entirely on the base plate and reciprocated, the existing reciprocating device can be modified and the structure is simple.

A reciprocating device of the type in which a swinging arm is moved up and down by a crank directly connected to an electric motor is simple and lightweight, and is ideal for application of the device of the present invention.

In order to achieve the same effect, it is necessary to run multiple reciprocating devices in parallel or change the conveyor speed, but with the device of the present invention, the conveyor speed remains the same and only one reciprocating device is required, reducing equipment costs. This is a unique device that has the excellent effect of saving money and greatly improving productivity.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of the device of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a side view showing the operation. 1... Guide rail, 3... Base plate, 4... Electric motor, 5... Support column, 6... Swinging arm, 8... Spray gun, 10 Crank, 11... Connecting rod , 13... Cylinder, 14... Piston rod, 15, 16... Solenoid valve, 17° 18... Limit switch.

Claims (1)

[Claims] 1 A guide rail is laid parallel to the conveyor that transports the objects to be coated, and a base plate is provided that reciprocates on the guide rail at a constant stroke.A motor and a crank driven at deceleration by the electric motor are mounted on the base plate. A series of reciprocating devices are installed, consisting of a swinging arm that moves up and down with a crank, and a spray gun held at the tip of the swinging arm. A paint spraying device characterized in that the spraying range is expanded by horizontally moving the paint back and forth.