JPH0742604Y2 - Blast nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an improvement of a blast nozzle for spraying a polishing agent on various shot objects for polishing.

(B) Conventional Technology Conventionally, as a blast nozzle of this type, a conduit for guiding a polishing agent is provided at the center of a nozzle body, and an air flow path for guiding air is provided substantially coaxially with the conduit. Normally, the air flow path was linearly formed of metal or hard rubber.

(C) Problems to be Solved by the Invention According to the above conventional structure, air is linearly guided to the air flow path and blows out linearly from the tip of the nozzle, and the natural diffusion of the air due to its own expansion occurs. Just get
The polishing agent blown out by it is almost linear and diffusion is not sufficiently obtained, and also in the polishing action, it results in being sprayed only in the direction substantially at right angles to the object, and hits the surface, the concave portion, and the convex portion. There is a problem that it takes time to polish difficult areas and the working time becomes long.

An object of the present invention is to solve the above problems and to provide a blast nozzle capable of performing efficient polishing work in a short time in a wide range.

(D) Means for Solving Problems The blast nozzle according to the present invention has an air intake port in the nozzle body and a linear polishing toward the nozzle tip as described in claim (1). A conduit to guide the agent,
In the blast nozzle provided with a nozzle tip member having an air flow path concentric with the conduit on the radial outside of the conduit, the nozzle tip members 7, 7A are configured in a substantially cylindrical shape,
Threaded portions 7d and 7C for attaching to the nozzle body 1 are provided on the outer peripheral surface of the nozzle tip member 7, 7A, and the air flow path 6 is constituted by a spiral groove 8 and the nozzle tip member 7 It is characterized in that the conduit 5 is held by 7A.

Further, as described in claim (2), the nozzle tip member 7 is composed of an outer housing member 7a and a substantially cylindrical inner peripheral wall member 7b fitted therein, and the inner peripheral wall member 7b.
The spiral groove 8 is formed on the outer peripheral surface 7e, and the inner peripheral wall member 7b is configured to hold the conduit 5.

Further, as described in claim (3), the nozzle tip member 7A
However, the spiral groove 8 is formed by the inner peripheral surface 7D and the outer peripheral surface of the conduit 5, and the inner peripheral surface 7D is configured to hold the conduit 5. It is characterized by being present.

In the present invention, the case where the nozzle tip member is composed of one member and two members has been described in forming the spiral groove. However, when the nozzle tip member is composed of two members, the spiral groove of the housing member is formed. It may be formed on the inner peripheral surface, or may be formed on both this member and the inner peripheral wall member.

Further, the spiral groove has a groove width wider than that of the plateau, or a groove having a groove width wider than that of the plateau, in addition to a groove having a groove width narrower than that of the plateau. A suitable shape may be used, and the number of grooves is not limited to four, as in the embodiment, and the spiral pitch is such that a substantially spiral injection can be achieved. I wish I had it.

(E) Action In the blast nozzle according to the present invention, at the nozzle tip portion, the nozzle tip members 7 and 7A are formed in a substantially cylindrical shape,
Threaded portions 7d and 7C for attaching to the nozzle body 1 are provided on the outer peripheral surface of the nozzle tip member 7, 7A, and the air flow path 6 is constituted by a spiral groove 8 and the nozzle tip member 7 , 7A is configured to hold the conduit 5 so that the swirling motion is imparted to the air passing therethrough, and when it exits the nozzle tip, the compressed air diffuses due to its own expansion and centrifugal due to swirling. Due to the action of force, the spread to the outside is further increased, whereby the polishing agent carried by the air is also given a swirling motion, and at the same time, it is subjected to centrifugal action and is sprayed over a wide range while diffusing.

Moreover, since the polishing agent swirls forward and collides with the target object, it does not always collide with the target object in a direction at a right angle, but collides obliquely with it. In addition, the swirling air and the colliding air can generate a complicated vortex flow, further promoting the blasting action of the polishing and cleaning agent.

(F) Embodiment An embodiment of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a vertical sectional side view of a blast nozzle according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a perspective view of a main portion, and FIG. 4 is a perspective view of another embodiment. The perspective view of a part is shown.

FIG. 1 is a vertical sectional side view of a blast nozzle according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a perspective view of a main portion, and FIG. 4 is a perspective view of another embodiment. It is a perspective view of a part.

As shown in FIGS. 1 to 3, 1 is a nozzle body, and compressed air intake ports 2 are provided at two locations facing each other in a direction orthogonal to the air injection direction.

Reference numeral 3 is a polishing agent inlet fitting, which is opened on the side opposite to the air jetting direction, is screwed to the nozzle body 1, and is linearly polished toward the nozzle tip portion 4 A conduit 5 for guiding the agent is connected in series. The conduit 5 is made of ceramic and is detachably attached to the nozzle body 1.

A nozzle tip member 7 having an air flow path 6 concentric with the conduit 5 is provided radially outward of the conduit 5.

The nozzle tip member 7 includes an outer housing member 7a,
The housing member 7a is formed with a substantially cylindrical inner peripheral wall member 7b fitted therein, and an outer peripheral surface 7c of the housing member 7a is provided with a screw portion 7d for attaching to the nozzle body 1.

Then, four spiral grooves 8 are formed on the outer peripheral surface 7e of the inner peripheral wall member 7b, and the conduit 5 is formed by the inner peripheral wall member 7b.
Is configured to hold. The spiral groove 8
The groove 8b has a width smaller than that of the plateau 8a.

A flange portion 9 for locking the inner peripheral wall member 7b is formed on the front surface of the housing member 7a, and the spiral groove 8 is formed in the flange portion 9.
The cutouts 9'are formed at four places so as to be continuous.

When the nozzle tip member 7 is composed of such two members, the spiral groove 8 can be processed as an outer peripheral groove, and the work is easy.

The operation is as follows: the polishing / cleaning agent is guided from the above-mentioned polishing / cleaning agent inlet fitting 3 to reach the tip through the conduit 5, while the air flowing in from the air intake ports 2, 2 is constituted by the nozzle tip member 7. The spiral groove 8 is swirled to reach the tip, and is sprayed forward together with the polishing agent in a spiral shape.

At this time, since it advances while swirling and expands, it becomes easier to spread, and in addition, centrifugal force acts on the polishing agent to further promote diffusion.

FIG. 4 shows another mode of the nozzle tip member 7, wherein the nozzle tip member 7A is constructed as one baht, that is, a single member, and the nozzle tip portion 7A is formed in a substantially cylindrical shape. A screw portion 7C for attaching to the nozzle body 1 is provided on the outer peripheral surface 7B, four spiral grooves 8 are formed on the inner peripheral surface 7D, and the conduit 5 is formed on the inner peripheral surface 7D. It is configured to hold.

When the nozzle tip member 7 is configured as one such part, the spiral groove 8 is processed into a groove on the inner peripheral surface, which is a problem in processing, but has the advantage of reducing the number of parts and simplifying the assembly. is there.

(G) Advantageous Effect of the Invention As is apparent from the above description, the blast nozzle according to the present invention can inject the blast in a spiral shape and diffuses in the radial direction by the configuration according to claim (1). There is an advantage that it can be performed, the shot range can be expanded, and the working time can be shortened. In addition, the nozzle tip member that forms the spiral groove can be easily attached to and detached from the nozzle body with the screw part, and also serves as a conduit for the polishing agent to pass through, so the nozzle tip becomes solid and spiral. It is possible to maintain a stable spiral jet without easily breaking the relative relationship between the air jet from the groove and the abrasive spray from the conduit.

At the same time, by blasting the blast in a spiral shape, the blast can be collided not only in a direction perpendicular to the object but also in an oblique direction, and an effect can be obtained in which the concave portion and the convex portion can be efficiently shot.

Further, according to the configuration described in claim (2), there is an advantage that the spiral groove can be easily machined.

Further, according to the configuration described in claim (3), the spiral groove can be configured by one member, and there is an advantage that the number of parts can be reduced and the nozzle body can be easily assembled.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a blast nozzle according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a perspective view of a main portion, and FIG. 4 is a perspective view of another embodiment. It is a perspective view of a part. In the figure, 1 ... Nozzle body, 2 ... Air inlet, 4 ... Nozzle tip, 5 ... Conduit, 6 ... Air flow path, 7 (7A)
...... Nozzle tip member, 8 ...... Spiral groove, 7a …… Housing member, 7b …… Inner peripheral wall member, 7c …… Outer peripheral surface, 7d ……
Screw part, 7e …… Outer peripheral surface, 7e, 7C …… Screw part, 7D …… Inner peripheral surface.

Claims (3)

[Scope of utility model registration request] 1. A nozzle body (1) is provided with an air intake port (2) and a conduit (5) for linearly introducing a polishing agent toward a nozzle tip portion (4) is provided. In a blast nozzle provided with a nozzle tip member 7 having an air passage 6 concentric with the conduit 5, the nozzle tip members 7, 7A are formed in a substantially cylindrical shape, and the outer peripheral surface of the nozzle tip member 7, 7A Screw parts 7d, 7C for attachment are provided, the air flow path 6 is constituted by a spiral groove 8 in the nozzle tip member 7, 7A, and the conduit 5 is held by the nozzle tip member 7, 7A. A blast nozzle configured as described above. 2. The nozzle tip member 7 comprises an outer housing member 7a and a substantially cylindrical inner peripheral wall member 7b fitted therein, and the spiral groove 8 is formed on the outer peripheral surface 7e of the inner peripheral wall member 7b. The blast nozzle according to claim 1, wherein the blast nozzle is formed, and the inner peripheral wall member 7b is configured to hold the conduit 5. 3. The nozzle tip member 7A is composed of a single member, and the inner peripheral surface 7D and the outer peripheral surface of the conduit 5 form the spiral groove 8, and the inner peripheral surface 7D forms the spiral groove 8. Conduit 5
The nozzle for blasting according to claim 1, which is configured to hold.