JPH07265751A - Attachment for air spray gun - Google Patents

Abstract

(57) [Summary] [Purpose] An air spray gun that can easily attach and detach the air nozzle, easily remove clogging of the air nozzle and paint passage, and keep the air nozzle concentric with the paint nozzle. For attachment. [Structure] An air nozzle and a paint nozzle surrounding the air nozzle are concentrically attached to the attachment body connected to the gun body, and the paint is ejected from the paint nozzle by the ejector action of the pressurized air ejected from the air nozzle. In the air spray gun attachment described above, a circular recess is formed at the front end of the attachment body, a paint passage communicating with the paint discharge port of the gun body is formed at an eccentric position at the back end of the attachment body, and the attachment is close to the recess. An air nozzle fitted with a perforated plate that fits in is screwed into an air supply hole formed at the center of the deep end of the recess, and a paint nozzle is screwed into the attachment body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to an attachment mounted on an air spray gun for spraying a highly viscous paint mixed with aggregates and fibers on the outer wall of a building.

[0002]

2. Description of the Related Art Conventionally, this type of attachment for an air spray gun has an air nozzle mounted through the attachment body, and the packing fitted in the gap is tightened with bolts from both sides to seal the paint passage. Since it is formed on the outer circumference of the attachment body, it is difficult to remove the air nozzle, and it has the drawback that it takes a long time to remove it if the air nozzle or paint passage is clogged. Since it is supported by a cantilever, it has a drawback that it is likely to be misaligned with the paint nozzle.

[0003]

The problem to be solved by the present invention is that the air nozzle can be easily attached and detached, the clogging of the air nozzle and the paint passage can be easily removed, and the air nozzle can be used as the paint nozzle. It is to provide an attachment for an air spray gun that can be kept concentric with.

[0004]

As a means for solving the above problems, the present invention has an attachment body connected to a gun body, in which an air nozzle and a paint nozzle surrounding the air nozzle are concentrically mounted. In an attachment for an air spray gun in which paint is ejected from the paint nozzle by the ejector action of the pressurized air ejected from the air nozzle, a circular recess is formed at the front end of the attachment body, and at the eccentric position at the back end of the recess. While forming a paint passage that communicates with the paint discharge port of the gun body,
An air nozzle equipped with a perforated plate that fits closely into the recess was screwed into an air supply hole formed at the center of the back end of the recess, and a paint nozzle was screwed into the attachment body.

[0005]

The present invention has the above-described structure, and the air nozzle can be easily removed by removing the paint nozzle, so that the clogging can be removed, and the air nozzle can be removed by removing the air nozzle. The clogging can be easily removed, and since the perforated plate is fitted in the recess almost tightly, it is possible to prevent the air nozzle from tilting and being misaligned with the paint nozzle.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes an attachment main body which is connected to a paint discharge port of a gun main body (not shown) through a joint 3 by a hub nut 2, and a circular concave portion 4 formed on a front end surface is located at an eccentric position at its inner end. The formed paint passage 5 communicates with the joint 3.

Reference numeral 7 denotes an air nozzle having a large-diameter portion 8 formed at the center thereof, and a male screw 10 formed at the rear portion is screwed into a female screw 9 of an air supply hole 6 formed at the center of the rear end of the recess 4. Then, the large-diameter portion 8 abuts on the deep end of the recess 4.

The male screw 11 formed on the front side of the large diameter portion 8 of the air nozzle 7 has a perforated plate 12 having several holes 13 formed therethrough.
Is screwed into the female screw 14 and hits the large-diameter portion 8,
The outer periphery thereof is fitted into the inner periphery of the recess 4 in a substantially tight manner.

The male screw 15 formed on the outer periphery of the front end of the attachment body 1 has a paint nozzle 16 and a lock nut 1.
A nozzle tip 18 that is concentric with the air nozzle 7 is screwed to the tip of the paint nozzle 16.

The air supply hole 6 is connected to a pressurized air supply source (not shown) via a needle valve and an opening / closing valve 19 (not shown).

The present embodiment has the above-mentioned structure, and the paint pressure-fed from the gun body enters the recess 4 through the joint 3 and the paint passage 5 and passes through the holes 13 of the perforated plate 12 so that the paint is uniform over the entire circumference. The paint mixes with the air due to the ejector action of the pressurized air ejected from the air nozzle 7 as a flow, passes around the air nozzle 7, and the nozzle tip 1
Eject from 8.

When the air nozzle 7, the air supply hole 6 or the paint passage 5 is clogged, the lock nut 17 is used.
Loosen and turn the paint nozzle 16 to attach the attachment body 1
Since the air nozzle 7 is exposed when it is removed from the attachment, it can be removed together with the perforated plate 12 from the attachment body 1 by rotating it.

Then, the air nozzle 7 can be easily washed, and the recess 4 is opened.
The paint passage 5 and the air supply hole 6 can also be easily washed.

Further, since the air nozzle 7 is screwed to the attachment body 1 at the rear part and the perforated plate 12 screwed to the front part is fitted in the recess 4 almost tightly, inclination may occur. Therefore, it is possible to maintain the concentricity with the nozzle tip 18 of the paint nozzle 16.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

[Explanation of reference numerals] 1: Attachment body 4: Concave surface 5: Paint passage 6: Air supply hole 7: Air nozzle 12: Perforated plate 16: Paint nozzle

Claims (1)

[Claims] 1. An attachment body connected to a gun body, wherein an air nozzle and a paint nozzle surrounding the air nozzle are concentrically mounted, and the paint is ejected from the paint nozzle by an ejector action of pressurized air ejected from the air nozzle. In an attachment for an air spray gun that is designed to eject, a circular recess is formed at the front end of the attachment body, and a paint passage communicating with a paint discharge port of the gun body is formed at an eccentric position at the back end of the recess. The screwing the air nozzle, which has a perforated plate that fits closely into the recess, into an air supply hole formed at the center of the back end of the recess, and screwing the paint nozzle to the attachment body. A characteristic air spray gun attachment.