JPH0522052U - Gravity type electrostatic hand spray gun - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a hand-held spray gun with excellent handleability and operability, which is optimal when small or small amounts of paint are applied by electrostatic painting. [Structure] A paint cup is provided on the upper part of the grip body that serves as a handle, and in order to supply the paint passage from the grip body to the atomizing device attached to the tip part through the barrel of the insulating material, the barrel tip is connected to the grip body. Inserted the paint pipe leading to it, and made both ends airtight.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spray gun that uses static electricity to perform an electrostatic coating that improves the effect of coating particles, and particularly relates to an electrostatic hand spray gun with a coating container that is used when a small amount of coating is performed. Is.

[0002]

[Prior Art]

 A spray gun for electrostatic coating improves the adhesion to the opposite object by the static electricity given to the atomized paint particles, and has many effects in saving paint, safety and health, pollution prevention, etc. It is already used in many fields as a cancer. Since these spray guns are generally mainly applied in production plants, they have been used when a relatively large amount of paint is to be pumped to the spray gun using a pump or other supply device. ing. Therefore, in most cases, the paint container is not attached, and even if it is attached, a relatively long insulating barrel (barrel) is provided between the paint supply unit provided near the atomizing unit and the handle unit. ), The center of gravity moved to the tip, making it extremely impractical to use.

In addition, the construction of an electrostatic gun with a paint container attached is necessary depending on the application, and in the spraying of high-performance and high-priced paints in recent years, it is required to save paint more than ever, and it is less. There is a high demand for effective use of paint. However, there is no example in which these are put into practical use, and the concept is merely shown in the external view, for example, as in Japanese Utility Model Laid-Open No. 60-148052. If the problem for practical use is solved, the problem that a large amount of paint had to be used even with a small amount of paint as in the past will be solved, and a great effect will be obtained.

[0004]

[Problems to be solved by the device]

 As described above, the electrostatic gun with the paint container attached is a conceptual one within the range of the technique shown heretofore, and many problems to be solved practically remain. That is, in the case of a handgun, it is clear that the ease of use is important as long as it is manually operated and painted, and that it affects the finish of the coating film. However, in general, including conventional spray guns, the paint container is installed near the atomizing part at the tip of the gun and the paint passage is shortened, so the center of gravity is applied to the tip. In the case of an electrostatic gun, the atomizing part and the operating part, which is at ground potential, have an insulating barrel (barrel) that maintains the insulation distance required to prevent high-voltage creeping discharge, so the center of gravity position is , It becomes a static gun that is hard to use due to the strong impact on the tip. For this reason, it is necessary to specify the installation position of the paint container and to supply the paint from that position to the atomizing device section at the tip without any hindrance.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention solves the above problems by providing a grip made of a conductive material and maintained at a ground potential, a barrel made of an insulating material connected to the front of the upper part of the grip and extending forward, and a front end of the barrel. In a hand-held electrostatic gun that has an atomizing device that includes an electrode with a high potential, a paint container is provided above the grip body, and the bottom of this container and the paint pipe provided in the grip body are in communication. The paint pipe is airtightly inserted into a paint pipe insertion hole formed from the rear end of the barrel on the grip body side toward the front of the atomizing device side, and communicated with the atomizing device. .. The tip of the paint pipe is fitted with a seal ring so that when it is inserted into the pipe insertion hole, airtightness is maintained as close as possible to the atomizing device, and the necessary insulation distance from the rear grip body is maintained. It is desirable to maintain it.

[0006]

[Action]

 With the above configuration, the weight of the container including the paint is higher than that of the grip, so the entire weight is on the hand, but since the center of gravity does not come to the front, it is not necessary to grip strongly, and even if it is used for a long time, tired Also, the paint passage that connects the grip body and the barrel is constructed by inserting a pipe, so it is easy to remove and install, and handling and simplification of maintenance are possible. Becomes

[0007]

【Example】

 FIG. 1 is a sectional view of an electrostatic gun showing an embodiment of the present invention. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a partial sectional view showing the section taken along the line BB of FIG. However, FIGS. 2 and 3 are enlarged as compared with FIG. As shown in these drawings, the electrostatic gun includes an atomizing device 1, a barrel 2, a grip body 3, and a paint container 4, and has the same basic structure as that of an already known electrostatic gun. That is, the grip body 3 is formed of a conductive metal and is maintained at the ground potential. An air inlet 31 for blown air is provided in the lower part, an air hose 32 is attached, and a high voltage cable 33 for charging a high voltage is attached to a charging electrode 11 provided at the tip of the atomizer 1. .. The compressed air introduced from the air intake 31 is sent to the atomizing device 1 at the tip of the spray gun through the air passages 35 and 36 via the air valve 34 on the upper part of the grip body 3. The high-voltage cable 33 passes through the grip body 3, is inserted into the barrel 2, and is in contact with the rear end of the high resistance 21 mounted in front of the barrel 2. The tip of the high resistance 21 further passes through a coil spring conductive member 24, a conductive wire 25, and a coil spring conductive member 26, and is electrically connected to the electrode 11 from the metal portion of the needle valve 16. ..

As described above, the barrel 2 is generally made of synthetic resin as an insulating material, and is detachably attached to the metal grip body 3 by the cover ring 22. The guide ring 23 fitted in the rear end of the barrel 2 guides the air pipe 37, the paint pipe 43, the needle valve guide 18, and the high-voltage cable 33 from the grip body 3, and a guide for maintaining airtightness. A hole is provided. A paint nozzle 12 is attached to the tip of the barrel 2, and an air cap 14 is also detachably attached by a cover 13. These common configurations are also used in other electrostatic spray guns.

In the configuration showing the features of the present invention, first, the resin paint container 4 is gripped and attached to the upper portion of the main body 3 by the joint 41 so that the center of gravity thereof is almost directly above. The lower portion of the joint 41 communicates with a paint passage hole 42 opened from the front end of the grip body 3. A paint pipe 43 made of resin is inserted into the passage hole 42, and airtightness is maintained by a packing 44. ing. The paint pipe 43 projects long at the front end, and a seal ring 45 is attached to the outer circumference of the tip. When the barrel 2 and the grip body 3 are assembled together, the paint pipe 43 protruding long is inserted into the insertion hole 28 of the barrel 2 and is kept airtight by the seal ring 45 near the tip of the barrel 2. The tip of the insertion hole 28 is communicated with the passage 15 in the paint nozzle 12 via the passage 29, and is sprayed and atomized by retreating the needle valve 16. The paint pipe 43 maintains the performance safely by keeping the position of the seal ring 45 as close as possible to the tip of the barrel 2 and setting the distance from the conductive grip body 3 to the distance required to prevent creeping discharge. Thus, the paint from the paint container 4 provided on the upper part of the rear grip body 3 can be supplied to the paint nozzle 12 of the atomizing device.

[0010]

[Effect of the device]

 As will be understood from the description of the embodiments, according to the present invention, by attaching the paint container to the electrostatic spray gun, efficient painting can be performed using a small amount of paint, and the conventional pressure-feeding type is used. Compared with the case of using a pump and paint hose like the electrostatic gun of the above, much less paint is needed and the paint can be used up without waste, so it is sufficient to prepare the minimum necessary paint, especially Only a small amount is used and the effect is remarkable in the case of expensive coating.

In addition, since the present invention provides a paint container on the grip, it has stability during operation, is easy to use, and has a good finish. In addition, the paint passage can be inserted and removed. Due to the effective paint pipe, the paint container side and the paint nozzle side are formed so as to maintain airtightness and communicate with the outside, so there is no harmful effect such as leakage, easy handling, and excellent in practical use. Can be used as an electrostatic gun.

[Brief description of drawings]

FIG. 1 is a sectional view of an electrostatic spray gun showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a partial cross-sectional view showing only the paint pipe insertion portion in the BB cross-sectional view of FIG.

[Explanation of symbols]

 1 Atomizer 2 Barrel 3 Grip Main Body 4 Paint Container 11 Charge Electrode 28 Insertion Hole 33 High Voltage Cable 42 Paint Passage Hole 43 Paint Pipe

Claims (1)

[Scope of utility model registration request] 1. A grip part made of a conductive material and maintained at a ground potential, a barrel made of an insulating material connected to the front of the upper part of the grip part and extending forward, and an electrode having a high potential at the front end of the barrel. In a hand-held electrostatic gun with an atomizing device including
A paint container is provided on the upper part of the grip body, the lower part of this container and the paint pipe provided on the grip body are in communication with each other, and the paint pipe is formed from the rear end of the barrel on the grip body side toward the atomizer side. An electrostatic spray gun which is airtightly inserted into the paint pipe insertion hole and communicated with the atomizing device.