JP5334345B1 - Air nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To significantly increase an air injection amount by effectively using a negative pressure state in front of an air injection unit without obstructing a main air flow, and to locally inject an injection target position. Also be able to do.
SOLUTION: An air inlet portion 2 is provided on the base end 1a side, an air ejection portion 3 is provided on the distal end 1b side, and the inside becomes a hollow portion 4 communicating with the inlet portion 2 and the ejection portion 3. The entire flat air nozzle 1 has a plurality of air injection holes 5 arranged in the left and right width direction at predetermined intervals on the front surface of the ejection portion 3. 9 is formed, and an intake / exhaust opening 7 through which air is introduced from the outside is formed at the base of the horizontal frame 6 at a predetermined interval in the left-right width direction.
[Selection] Figure 1

Description

  The present invention relates to an air nozzle for injecting compressed air.

  Conventionally, this type of nozzle is a so-called flat type nozzle that is entirely flat, and is composed of a casing body and a lid member. Inside, an air supply port for taking in air from one end and air flowing in from the air supply port A passage-shaped hollow portion through which air passes, an injection side wall provided on the other end side of the air supply port, and a large number of air injection ports arranged in the injection side wall are known.

JP-A-1-317561 JP-A-8-38948

  In the conventional air nozzle described above, when a part of a body such as a user's hand comes into contact with the air ejection port during use, the high-pressure air ejected from the air nozzle adversely affects the user's body. In addition, there is an inconvenience that when the efficient and smooth flow of air is not sufficiently ensured, the air injection force is weak and the efficiency of the work is reduced.

  Further, the above-described conventional air nozzle has a drawback that the air jetted from the air jet port spreads widely, so that accurate narrowed jetting to the injection target position cannot be sufficiently performed.

  It is an object of the present invention to effectively increase the air injection amount by effectively utilizing the negative pressure state in front of the air injection unit without interfering with the main air flow, and accurately to the injection target position. An object of the present invention is to provide an air nozzle capable of performing simple injection.

According to the first aspect of the present invention, an inlet portion into which air enters is provided on the proximal end side, an ejection portion from which air is ejected is provided at the distal end side, and the inside is a hollow portion communicating with the inlet portion and the ejection portion. In the flat air nozzle that is flat as a whole, a plurality of air injection holes are provided at predetermined intervals in the left-right width direction at the central portion of the thickness of the front surface of the ejection portion, and are provided at the upper and lower edges of the front surface of the ejection portion. Each has a horizontal frame extending in the left-right width direction and projecting forward from the front end opening of the air injection hole, and a recess is formed from the base of the horizontal frame to the rear, and the base of the horizontal frame at the bottom of the recess In this, intake and exhaust openings for sucking and discharging air are formed at predetermined intervals in the left-right width direction.

According to a second aspect of the present invention, the flat type air nozzle according to the first aspect is characterized in that the air injection holes and the intake and exhaust openings are formed alternately in the left-right width direction. To do.

According to a third aspect of the present invention, there is provided the flat air nozzle according to the first or second aspect, wherein the bottom surface of the concave portion is an inclined surface having an upward slope from the distal end side toward the proximal end side. Characteristic.

According to a fourth aspect of the present invention, in the flat type air nozzle according to any one of the first to third aspects, the front surface of the air ejection portion has a mountain shape in cross section, and an air injection hole is formed at the top portion. The tip opening of is located.

According to a fifth aspect of the present invention, there is provided the flat air nozzle according to any one of the first to fourth aspects, wherein the vertical air nozzle is vertically disposed between the left and right end portions of the horizontal frame formed at the upper and lower edges of the air ejection portion. It is a technical feature that a frame is formed.

  The air nozzle according to the first aspect of the present invention has a structure in which external air is taken in through an intake / exhaust opening formed in a base portion of a horizontal frame adjacent to the air injection hole, and therefore uses more air than a conventional air nozzle. As a result, external air is introduced so as to be guided directly to the negative pressure area formed in front of the air injection hole. A special technical effect is obtained. Further, in the air nozzle of the present invention, when a part of the body such as a user's hand comes into contact with the air injection hole during use, the high-pressure air injected from the air nozzle is used for the intake / exhaust opening. Therefore, adverse effects on the user's body are reliably prevented.

  The air nozzle according to claim 2 is formed such that air injection holes and intake / exhaust openings are alternately arranged in the left-right width direction, thereby further promoting a significant increase in the air injection amount, and each intake / exhaust The opening for use has a structure formed in the bottom surface of a recess extending rearward from the base of the horizontal frame, so that the recess serves as a physical reinforcing rib, and the external air is lined up in the left-right width direction. Since the air is sucked into the recessed portion provided and ejected from the intake / exhaust opening, the external air has a special advantage that it is rectified and ejected by each concave portion.

  In the air nozzle according to the third aspect of the invention, the bottom surface portion of the recess is further inclined upward from the distal end side to the proximal end side, so that the above-described external air is injected from the central air injection hole. As a result, the external air is more smoothly merged with the main air flow without disturbing the main air flow, so that the air injection as a whole is performed. Further increase in quantity is possible.

  According to the air nozzle of the fourth aspect, the above-described negative pressure state in front of the air injection hole is used more effectively, and the generation of noise during use is reduced.

  In the air nozzle according to the fifth aspect, since the vertical frame is formed between the left and right end portions of the horizontal frame formed at the upper and lower edges of the air ejection portion, the air ejected from the air ejection hole spreads in the left-right direction. It can be regulated, so that more local air blowing is possible.

  In addition, in the air nozzle of the present invention, while the air injection amount is increased, since the structure has no partition walls or the like in the vertical and horizontal frames, an increase in noise can be prevented.

It is a perspective view of the air nozzle which concerns on embodiment of this invention. It is a front side perspective view of the air nozzle which concerns on the same embodiment. It is a back side perspective view of the air nozzle which concerns on the same embodiment. It is a top view of the air nozzle which concerns on the same embodiment. It is a side view of the air nozzle which concerns on the same embodiment. It is a top view of the same air nozzle in the state where a lid member was removed. FIG. 5 is a cross-sectional view taken along line AA in FIG. 4. FIG. 5 is a cross-sectional view taken along line BB in FIG. 4. It is a partial expanded sectional view which shows the flow of the air in the air nozzle of the embodiment. It is sectional drawing which shows other embodiment. It is a test photograph which shows the air blowing state by the conventional air nozzle. It is a test photograph which shows the air blowing state by the air nozzle of embodiment.

  Next, although embodiment of this invention is described according to drawing, this invention is not limited to this embodiment.

  As shown in FIG. 1 to FIG. 6, an inlet portion 2 into which air enters is provided on the base end 1 a side, and an ejection portion 3 from which air is ejected is provided on the distal end 1 b side, and the inside is the inlet portion 2 and the ejection portion 3. The flat air nozzle 1 is a flat flat air nozzle 1 that communicates with the hollow portion 4 and has a plurality of air injection holes 5 at predetermined intervals in the left-right width direction. A horizontal frame 6 extending in the left-right direction and extending forward from the front end opening 5a of the air injection hole 5 is formed on the upper and lower edges of the front surface of the ejection portion 3, and is formed in a row. In the base, intake / exhaust openings 7 for introducing air from the outside are formed at predetermined intervals in the left-right width direction.

As shown in FIGS. 1, 2, 7, and 9, in this embodiment, the air injection holes 5 and the intake / exhaust openings 7 are formed alternately in the left-right direction, and each intake / exhaust opening 7 is formed. Is formed on a bottom surface portion 8a of a recess 8 extending rearward from the base portion of the horizontal frame 6, and the bottom surface portion 8a of the recess 8 is an inclined surface having an upward slope from the distal end side toward the proximal end side.

Further, the front surface of the air ejection portion 3 has a mountain shape in the cross section in the present embodiment, the tip opening 5a of the air ejection hole 5 is located at the top portion 3a, and is formed at the upper and lower edges of the air ejection portion 3. A vertical frame 9 is formed between the left and right ends of the horizontal frame 6.

As shown in FIGS. 3, 5, and 6, the air nozzle 1 according to the present embodiment includes a main body 1 </ b> A and a lid member 1 </ b> B attached to the main body 1 </ b> A, and the air that has entered from the air inlet 2 is a valve member. 11 passes through both sides of the three branch parts 12A and 12B and flows out to the ejection part 3 (see FIG. 6).

As shown in FIGS. 6 to 9, the air that has entered from the inlet portion 2 flows into the hollow portion 4 and spreads in the left-right direction, and then jets forward through the air ejection holes 5 in the ejection portion 3. Is done. At this time, the portion surrounded by the vertical and horizontal frames 6 and 9 in front of the ejection portion 3 is in a negative pressure state, and air is introduced into the negative pressure state portion from each intake / exhaust opening 7 and the air injection hole 5 It directly merges with the air to be ejected and ejected forward.

In the present embodiment, as described above, the bottom surface portion 8a of the concave portion 8 is an inclined surface. However, the present invention is not limited to this, and the concave portion 28 having a substantially horizontal bottom surface portion 28a as shown in FIG. good.

However, in the case of the concave portion 8 having the bottom surface portion 8a having the inclined surface, as shown in FIG. 9, the intake and exhaust openings are not disturbed with respect to the main air injected from the air injection holes 5 without disturbing this flow. Since the air is introduced from 7 so as to converge and the main air flow is enhanced as it is, it is more advantageous and noise can be reduced. Further, when the air nozzle is used, the vertical and horizontal frames 6 and 9 are in contact with the body even when the air nozzle is in contact with a part of the body such as the user's hand, and the air injection hole 5 is not in contact with the body. The safety of the work is ensured, and at this time, the air is discharged from each intake / exhaust opening 7, so that the safety can be maintained continuously.

Further, in the present embodiment, the recesses 8 are provided at regular intervals in the width direction and have a structure in which the ribs 13 are present between the adjacent recesses 8. 8 may be a wide one that extends in the width direction.

Furthermore, in this embodiment, by providing the vertical and horizontal frames 6 and 9 on the front surface of the ejection portion 3, the horizontal frame 6 prevents air from coming into direct contact with the user's body, and the vertical frame 9 Although air injection in the left and right direction is limited to perform forward and locally enhanced injection, the vertical frame 9 is omitted when a wide range of air injection is preferred for some applications. May be.

  [Comparative test]

  Next, the collision water pattern test relating to the air nozzle according to the present embodiment and the above-described conventional air nozzle will be described. As shown in FIGS. 11 and 12, water is previously poured into a thin water tank placed on the floor at a depth of several centimeters. When air is injected from the height of 500 mm at a static pressure of 0.1 MPa using each of the air nozzle of the present embodiment and the conventional air nozzle, and the state after about 4 seconds is compared, the conventional state shown in FIG. The air nozzle of this embodiment shown in FIG. 12 produces a larger circular gap than the air nozzle of FIG. 12, and it can be confirmed that the air nozzle of this embodiment has a larger air injection force than the conventional one. It was. In addition to these, tests at various static pressures and physical collision force measurement tests were also performed. In either case, good results were obtained for the air nozzle according to the present embodiment.

  According to the air nozzle of the present invention, the enhanced air is efficiently injected with respect to the supplied air, there is no risk of increase in noise, and safety for the user is ensured. Can be expected to be widely used in various industrial fields.

DESCRIPTION OF SYMBOLS 1 Air nozzle 2 Inlet part 3 Ejection part 4 Hollow part 5 Air injection hole 6 Horizontal frame 7 Intake / exhaust opening 8 Concave part 9 Vertical frame

Claims (5)

An inlet part for air to enter is provided on the base end side, a jet part from which air is jetted is provided on the distal end side, and the inside is a hollow flat part communicating with the inlet part and the jet part. In the air nozzle, a plurality of air injection holes are provided at predetermined intervals in the left-right width direction in the central portion of the thickness of the front surface of the ejection portion, and extend vertically in the left-right width direction at the upper and lower edges of the front surface of the ejection portion, and A horizontal frame projecting forward from the front end opening of the air injection hole is formed, and a concave portion is formed from the base portion of the horizontal frame to the rear side. Air is introduced into the base portion of the horizontal frame at the bottom portion of the concave portion from the outside. A flat air nozzle in which exhaust openings are formed at predetermined intervals in the left-right width direction. The flat air nozzle according to claim 1, wherein the air injection holes and the intake / exhaust openings are formed alternately in the left-right width direction .   The flat air nozzle according to claim 1 or 2, wherein a bottom surface portion of the concave portion is an inclined surface having an upward slope from the distal end side toward the proximal end side.   The flat type air nozzle according to any one of claims 1 to 3, wherein a front surface of the air ejection portion has a cross-sectional mountain shape, and a tip opening of an air injection hole is located at a top portion thereof.   The flat type air nozzle as described in any one of Claims 1-4 with which the vertical frame is formed between the right-and-left both ends of the horizontal frame formed in the up-and-down edge of the air ejection part.