JPH0614830Y2 - Paint discharge control device for painting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a device for controlling the amount of paint discharged from a painting device used for painting a vehicle body or the like.

(Prior Art) When painting a vehicle body or the like, it is necessary to control the discharge amount of the paint depending on the application site.

A coating device that controls the discharge amount of such paint usually has an air-driven gulator in the paint passage.
The regulator expands a part of the paint passage to form a chamber,
The chamber is divided by a diaphragm into an air chamber and a paint chamber that communicates with a high-pressure paint supply system, and the paint is opened and closed intermittently to open and close the communication state between the paint source and the paint chamber due to the pressure difference between the air chamber and the paint chamber. Is supplied and the air pressure acting on the air chamber is changed to drive the diaphragm, and in conjunction with this, the gap between the valve and the valve seat is changed to change the discharge amount.

(Problems to be Solved by the Invention) In order to control the amount of paint discharged by the above control device, the air pressure for operating the diaphragm must be changed. That is, the above conventional means controls the discharge amount of the paint only by changing the air pressure, so that the fluctuation range is large and it is difficult to control the minute discharge amount. Adjustment is difficult, color unevenness easily occurs, and control is difficult.

The present invention has been made to solve the above problems, and its purpose is to reliably control the coating amount according to the coating site to prevent the occurrence of color unevenness and uneven coating thickness. It is an object of the present invention to provide a paint discharge amount control device for a coating device which is prevented.

(Means for Solving Problems) In order to solve such problems, the present invention provides a paint supply port.
A paint passage (12) connecting both ports (2) and (3) is provided in the main body (1) where (2) and paint discharge port (3) are formed, and the air chamber is adjacent to this paint passage (12). (11) is provided and the paint passage (12)
The air chamber (11) is defined by the diaphragm (10), and the valve (17) attached to the diaphragm (10) is provided with a through hole (8) between the paint supply port (2) and the paint passage (12). The inside of the through hole by changing the air pressure in the air chamber (11).
The gap (s) between the (8) and the valve (17) is changed to control the discharge amount of the paint discharged from the communication hole (19) between the paint passage (12) and the paint discharge port (3). In the paint discharge amount control device described above, a control hole (21) forming a maximum paint discharge amount control passage corresponding to various coating devices is provided in the communication hole (19) between the paint passage (12) and the paint discharge port (3). The member (20) provided with (1) is arranged so that it can be attached freely.

(Operation of the above means) According to the above means, for example, a plurality of members (20) having control holes (21) of various hole diameters are prepared, and the maximum paint discharge amount is adjusted by replacing the members (20). To do.

When the paint discharge amount is regulated by the control hole (21), the change width of the paint discharge amount with respect to the change of the air pressure becomes small, and the fine adjustment of the paint discharge amount becomes easy.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a vertical side view of the device according to the present invention, FIG. 2 is a front view of the same, and FIG. 3 is an enlarged cross-sectional view of the main part of FIG.

In FIG. 1, reference numeral (1) is a block forming a main body, on which a paint supply port (2) is formed vertically, and in the embodiment, a paint discharge port (3) is formed laterally with a 90 ° separation from each other. The supply port communicates with the formed chamber (4) in the center of the body (1),
In the embodiment, the chamber (4) is formed with a chamber drawing recessed rearward, and the chamber (4) has a back surface with a blind cap bolt (6) screwed into the female screw part (5) formed between the chambers. It is blocked. A large-diameter recess (7) is formed on the front side of the main body (1), and a through hole (8) communicating with the chamber (4) is formed in the middle part of the main body (1), and the front surface of the main body (1) A cap (9) is attached to the side, and a diaphragm (10) is provided between the cap (9) and the front side of the main body (1) to provide an air chamber (11) on the cap side, and The paint passages (12) are defined by the recesses (7) on the main body (1) side, and the air chamber (11) is connected to the air source through a hole (13) provided at the center of the cap (9). Diaphragm (10)
A holder (14) is provided in the center of the chamber so that the chambers (11) and (12) communicate with each other, and the holder (14) is fixed to the center of the diaphragm (10) with a flange (15) and a nut (16). The tip of the rod (17a) of the valve (17) loosely fitted in the chamber (4) is screwed to the protrusion of the holder (14) toward the chamber (12), and the valve of the through hole (8) is A valve seat (18) is formed of rubber or the like on the periphery opposite to (17).

A communicating hole (19) in a direction orthogonal to the discharge port (3) is provided at one end of the discharge port (3), and the communicating hole (19) is opened at the end of the recess (7), and the chamber (12 ) And port (3) for communication. The communication hole (19) has a predetermined diameter, and the chamber (12) is connected to the port (3).
It is used as the maximum discharge amount control passage for the paint to be discharged to. In the embodiment, a female screw (19a) is formed in the inner diameter of the communication hole (19), and a rod-shaped male screw-shaped member (20) is screwed into this, and the control hole (2
Control hole (21) by forming 1) and modifying member (20)
The diameter can be changed, and in the embodiment, the hole diameter is 3 for intermediate coating.
mm with a hole diameter of 0.8 mm for overcoating.

In the above, the supply port (2) is connected to a paint supply source (not shown), the paint flows from the port (2) into the room (4), and the through hole
Flows through passageway (12) through (8), while diaphragm (10)
Is driven back and forth by the air pressure to the chamber (11), and the resulting back and forth movement of the valve (17) causes a clearance (s) between it and the valve seat (18).
To control the discharge amount. Conventionally, the paint supplied from the through hole (8) into the chamber (12) is immediately discharged from the discharge port (3), but the present invention is not limited to the paint discharged from the port (3) through the control hole (21). The maximum discharge amount is controlled and narrowed down by the control hole (21).

The results are shown in the graph of FIG. 4, where (A) is only due to the change in the air pressure of the conventional diaphragm, and (B) is the one using the throttle passage according to the present invention in which the air pressure is also used, and the same coating is used. When changing the output, the air pressure is
It can be understood that the width is extremely narrow as shown in (a), while the width is large as shown in (b), so that it is easy to control the air pressure, and therefore the discharge amount can be finely controlled.

As described above, the discharge amount is regulated by the control hole (21), the discharge amount with respect to the pressure change of the air is narrowed down, and the change of the discharge amount can be finely adjusted.

(Effects of the Invention) As is apparent from the above, according to the present invention, in the discharge amount control device in which the diaphragm (10) is driven by air pressure to control the discharge amount of the paint, the paint passage (12) and the paint discharge port are provided.
A member (2) provided with a control hole (21) constituting a maximum paint discharge amount control passage corresponding to various coating devices in the communication hole (19) between (3)
Since (0) can be attached freely, it can be easily replaced with a control hole (21) having an appropriate hole diameter according to the characteristics of various coating devices at the time of various coatings such as intermediate coating or top coating, The maximum discharge amount can be easily adjusted without replacing the regulator body.

At this time, by reducing the hole diameter of the control hole (21) to limit the maximum amount of paint to be discharged, the change range of the paint discharge amount with respect to the change of the air pressure becomes small, and the fine adjustment of the paint discharge amount becomes easy. .

That is, it is possible to reliably control the application amount according to the application site, and it is possible to prevent color unevenness and uneven coating film thickness.

In addition, the communication hole (1) between the paint passage (12) and the paint discharge port (3)
Since the member (20) provided with the control hole (21) is simply mounted in the member 9), there are advantages such as a simple structure.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a vertical side view of an apparatus according to the present invention, FIG. 2 is a front view of the same, and FIG. 3 is an enlarged view of the main part of FIG. A sectional view and FIG. 4 are graphs showing the relationship between the air pressure and the discharge amount of the present invention and the conventional example. In the drawing, (1) is a main body, (2) is a supply port, (3) is a discharge port, (12) is a passage, and (21) is a maximum discharge amount control hole.

Claims (1)

[Scope of utility model registration request] 1. A paint supply port (2) and a paint discharge port (3)
A paint passage (12) connecting both ports (2) and (3) is provided in the main body (1) in which the air chamber (11) is adjacent to the paint passage (12).
And the paint passage (12) and the air chamber (11) are provided with a diaphragm.
Defined by (10), this diaphragm (10)
The valve (17) attached to the paint supply port (2) and the paint passage
(12) between the through hole (8), by changing the air pressure of the air chamber (11) to change the clearance (s) between the through hole (8) and the valve (17), In the paint discharge amount control device for controlling the discharge amount of the paint discharged from the communication hole (19) between the paint passage (12) and the paint discharge port (3), the paint passage (12)
In the communication hole (19) between the paint and the paint discharge port (3), the control hole (2
A paint discharge amount control device for a coating device, characterized in that a member (20) provided with (1) is arranged so that it can be attached freely.