JPH0646521Y2 - Air pressure measuring device for air spray gun - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to atomizing air supplied to an air spray gun,
The present invention relates to a device in which the pressure of air such as pattern adjusting air is taken out on the air spray gun side and measured by a pressure gauge provided in an air supply source.

Problems to be solved by the conventional technology and device The air spray is atomized by discharging the paint at a low pressure from the nozzle at the tip of the spray gun and then spraying the atomizing air from the surrounding area. It is designed to discharge the pattern adjustment air from around it to adjust the pattern, and in the case of automatic painting, by checking each air pressure with a pressure gauge at the air supply source and adjusting it,
It is designed to adjust the degree of atomization of paint and the pattern diameter.However, when measuring the air pressure, if a pressure gauge is connected to the air outlet of the air supply source, the air supply source will be It is generally installed at a position away from the spray gun, and it is common to connect the air discharge port and the air supply port of the spray gun with a long air hose. A pressure value higher than the actual air pressure of the air supply port will be displayed, and if the air hose used is always the same, estimate the air pressure of the air supply port of the spray gun in anticipation of the pressure loss. However, if the conditions of the air hose change, it cannot be easily dealt with, and there is a drawback that it takes time to adjust the air pressure.

Therefore, conventionally, there is a spray gun that connects an air pressure measuring hose to the pressure gauge separately from the air hose, but it requires an extra hose piping space. There is a drawback that the installation location of the gun is limited, and the air supply port of the spray gun is
Although there is a detector equipped with a detector for electrically detecting the air pressure, it has a drawback that the cost is high and a new measuring device has been desired.

Means for Solving the Problems The air pressure measuring device for an air spray gun of the present invention has been devised in view of the above circumstances, and an air supply source for adjusting the air to an appropriate pressure and discharging the air. Air outlet of
Insert a small-diameter tube for air pressure measurement into the air hose connected to the air supply port for atomizing air of the air spray gun, air for pattern adjustment, etc., and make one end of the tube face the air supply port. The other end was connected to a pressure gauge provided in the air supply source.

The operation and effect of the present invention With the above configuration, the air discharged from the air discharge port of the air supply source passes between the inner circumference of the air hose and the outer circumference of the measuring tube, and supplies air to the air spray gun. While being sent to the mouth, part of the air sent to the air supply port is guided through the tube to the pressure gauge provided at the air supply source, and the air pressure at the air supply port is measured. Since the air at the air supply port of the air spray gun is guided to the pressure gauge via the tube, the actual air pressure at the air supply port of the air spray gun is measured almost as it is, regardless of the condition of the air hose. You can
Not only can the air pressure for atomizing air, pattern adjusting air, etc. be controlled easily and reliably, but the measurement tube has a double structure that is inserted into the air hose, so extra piping space is required. In addition, the freedom of setting the installation location of the air spray gun is not impaired, and it can be kept at a low cost compared to the case of using a detector that electrically detects the air pressure, Moreover, since the measuring tube itself has a small diameter, the effective area of the air hose is reduced only slightly, and the air amount can be supplied with almost no loss.

Embodiment An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, reference numeral 1 denotes an electrostatic air spray gun to which the present invention is applied, in which a low-pressure paint supplied from a paint supply source (not shown) through a paint passage 3 of a gun body 2 has a tip of a nozzle 4. Is discharged from the coating material discharge port 5 of the above, and together with this, a ring-shaped first air chamber 6 formed around the nozzle 4.
Atomizing air is supplied through the first air passage 7a also formed in the gun body 2 and is ejected from the injection holes 8 around the paint ejection port 5 to atomize the paint. Further, the pattern adjusting air is supplied through the second air passage 7b into the ring-shaped second air chamber 9 formed around the first air chamber 6, and the injection hole 8 is formed. Outer nozzle holes 10
The pattern diameter of the paint is adjusted to a constant value by being discharged from the sprayed paint around the spray paint, and the atomized paint is negatively charged by the electrode pin 11 inserted into the paint discharge port 5. It is adapted to be applied to an object to be painted (not shown) having a positive charge.

On the rear end surface of the gun body 2, the supply ports 13 for the first air passage 7a and the second air passage 7b are formed, and the nipples 14 screwed into the respective supply ports 13 have small diameters respectively. Is connected to one end of an air hose 16 having a measuring tube 17 inserted therein. One end of the tube 17 faces the vicinity of the inlet of the nipple 14, and is located at a position away from the installation location of the air spray gun 1 described above. A control panel 19 for adjusting the atomizing air and the pattern adjusting air to appropriate pressures and discharging them.
The control panel 19 is provided with a body 20 having a connection port 21 formed on one side and two outlets 22 formed on the other side so as to form a pair with each other. Intake
Discharge pipes 24 projecting 25 on the outer peripheral surface are screwed together, and the intake ports 25 of each discharge pipe 24 are connected to an air supply source 26 via a pressure adjusting valve (not shown) mounted on the control panel 19. The other end of each of the air hoses 16 is connected to each of the discharge pipes 24, and the other end of the tube 17 protruding from the other end of the air hose 16 is connected to the body 20 from the inside of the discharge pipe 24. The central hole of the packing 29 that is fitted through the insertion hole 28 at the rear end of the mouth 21 and further at the rear end of the outlet 22 on the opposite side of the body 20, and the screwdriver that is screwed to press the packing 29. It is inserted into the insertion hole 32 on the bottom surface of the hexagonal hole 31 of 30 and opens at the outlet 22 of the body 20, and the pressure gauge 33 is connected to each outlet 22 and attached to the control panel 19. ing.

This embodiment has such a structure, and when air is supplied from the air supply source 26 to each discharge pipe 24, the air spray is passed through between the inner circumference of each air hose 16 and the outer circumference of the measurement tube 17. Atomization air is supplied to the supply port 13 of the first air passage 7a of the gun 1 as atomizing air, and pattern supply air is supplied to the supply port 13 of the second air passage 7b as pattern adjusting air.
A part of the air pressure-fed to 13 is introduced into the pressure gauge 33 through the respective tubes 17, whereby the air pressure near each supply port 13 of the air spray gun 1 is measured.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of an embodiment of the present invention. 1: Air spray gun, 13: Supply port, 16: Air hose, 17:
Tube, 19: Control panel, 24: Discharge pipe, 26: Air supply source, 33:
Pressure gauge

Claims (1)

[Scope of utility model registration request] 1. An air hose connecting an air outlet of an air supply source for adjusting the air to an appropriate pressure and discharging it, and an air inlet for atomizing air of a spray gun, pattern adjusting air, etc. An air spray characterized in that a small-diameter tube for measuring air pressure is inserted, one end of the tube is exposed to the air supply port, and the other end is connected to a pressure gauge provided in the air supply source. Gun air pressure measuring device