JP2517327Y2 - air gun - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air gun for removing dust and the like.

[0002]

2. Description of the Related Art An air gun is used as a means for cleaning the grooves of a machine, sucking jig chips, or removing cutting debris remaining in a hole when boring a building or other structure. The conventional air gun has a compressed air introduction passage 30 connected to a compressed air supply unit (not shown) as shown in FIG.
And the injection / suction passage 31 communicating with each other via the communication passage 32.
A rotary switching valve 33 that can control the opening and closing of the passage 31 is provided at the rear position of the passage 31. That is, when the valve is opened, the compressed air is ejected from the compressed air introduction passage to the rear of the passage 31 so that the ejector action causes a suction action at the tip of the passage 31 (FIG. 5). When the valve is closed, the compressed air collides with the valve 33 and is blocked, and an injection action is obtained (FIG. 6).
However, such an air gun is inconvenient because only one of suction and injection can be performed by opening and closing the valve. Furthermore, when spraying, dust and cutting debris jump out vigorously and bounce off the eyes and face of the operator, which is very dangerous.

An air gun capable of simultaneously performing injection and suction is described in Japanese Utility Model Laid-Open No. 161688/1983. However, the air gun cannot be sucked or jetted individually, and is not easy to use.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to solve these problems of the prior art and to provide an air gun capable of performing injection and suction at the same time and capable of performing individual injection or suction. And

[0005]

The object of the present invention is to provide a suction passage having a suction port at one end and an exhaust port at the other end, and the nozzle tip faces the exhaust port in the middle of the suction passage. A nozzle is installed, and a base end side of the injection nozzle is connected to a compressed air introduction passage receiving compressed air from a compressed air supply unit through a first valve, and a branch passage is provided in the compressed air introduction passage. The branch passage is connected via a second valve to an injection passage having an injection opening at the tip, the injection passage is substantially parallel to the suction passage, and the injection opening at the tip is the suction passage. This is achieved by an air gun characterized by being opened near the mouth.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An air gun according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view showing an air gun according to the present invention. The air gun body 1 includes a suction passage 2, an injection nozzle 3 installed in the suction passage, a compressed air introduction passage 4 connected to a compressed air supply unit (not shown), and a branch that branches in the middle of the introduction passage. It has a passage 5 and an injection passage 6 connected to the branch passage.

The suction passage 2 has a suction port 7 on one end side and an exhaust port 8 on the other end side, and has a Venturi pipe structure in which both ends have a larger diameter than the central part. The tip of the injection nozzle 3 faces the exhaust port side of the suction passage, and the base end side is connected to the compressed air introduction passage 4 via the first valve 9.
Therefore, when the compressed air is jetted from the jet nozzle 3, a negative pressure is generated on the suction port side by the ejector action, and the suction port 7 performs the suction action. Further, the branch passage 5 is connected to the injection passage 6 via the second valve 10.

The valves 9 and 10 are normally closed and can be opened / closed by a push button operation. Pressing the first valve 9
In the state in which is open, the compressed air is jetted from the tip of the jet nozzle through the exhaust port 8 to the outside. When the pressure applied to the valve 9 is released, the valve 9 is closed and the injection of compressed air is blocked. The second valve 10 also operates similarly to the valve 9. That is, when the valve 10 is open, compressed air is ejected from the ejection port 11 at the tip of the ejection passage to the outside,
When the valve 10 is closed, the injection of compressed air is blocked.

The first valve 9 is provided in a direction crossing the central axis of the suction passage 2 (FIG. 2), and the second valve 1 is provided.
0 is provided in a direction parallel to the central axis of the suction passage (FIG. 1). In this way, by making the installation directions of the valves 9 and 10 different by 90 °, the push button operation can be performed with the thumb and the index finger, and the opening and closing of the valves can be easily and individually switched. By switching the valve opening / closing, (1) only injection (push only button 27), (2) only suction (push button 16 only), (3) injection and suction simultaneously (button 27,
16 press both), (4) alternate injection / suction (alternately press buttons 27 and 16), (5) perform temporary injection during suction (press button 16 to momentarily release button 16). Button 6), and (6) performing suction for a while during injection (pressing button 27 to release button 27 momentarily and pressing button 16).

The injection passage 6 extends substantially parallel to the suction passage 2. In this embodiment, the injection port 11 is located slightly rearward of the suction port 7.

A hose can be detachably connected to the injection port 11 and the suction port 7. It is desirable that the hose has flexibility such as vinyl chloride, and if it is tapered, it is advantageous for removing cutting chips in the corners and minute recesses. Further, if a dust collector or the like is connected to the exhaust port 8 via a hose, the sucked cutting chips can be collected without scattering.

Next, the functions of the push button type valves 9 and 10 will be described. As shown in FIG. 2, the valve 9
Comprises a valve shaft 13 having a valve body 14 coupled to one end and a push button 16 screwed to the other end. Between the push button 16 and the valve body 14, a closing member 15 that closes one end of the valve cylinder 17 and has the valve shaft 13 fitted therein is screwed into the air gun body. When the push button 16 is pressed against the air pressure acting on the valve element 14, the valve opening is opened, and compressed air is ejected from the valve opening through the ejection nozzle 3. When the pressure is released, the valve element 14 receives the air pressure and is instantaneously pushed back, and the valve element 14 seals the valve opening to prevent passage of compressed air to the injection nozzle 3.

As shown in FIG. 1, the valve 10 has a valve shaft 23 having a valve body 23 coupled to one end and a push button 27 screwed to the other end, and a valve body 22 having a flange 21 fitted therein. ing. Openings 24 are formed at two locations on the peripheral surface of the main body 22, and a valve opening is formed at the tip of the main body 22.
A screw 26 with a nut for fixing the main body 22 and closing one end of the branch passage 5 is screwed to the air gun main body 1 between the main body 22 and the push button 27. Push button 2
When 7 is pressed against the air pressure acting on the valve element 23, the valve opening is released from the valve element, and the compressed air is released from the valve opening, inside the valve body,
It flows into the injection passage 6 through the opening 24 and is injected from the injection port 11. When the pressure is released, the valve element 23 receives the air pressure and instantly moves so as to close the valve opening. Valves 9, 1
At 0, a spring may be provided to automatically restore the push button to the off position.

The removal of cutting chips and the like is performed as follows. First, the injection port and the suction port are located at a location where dust and cutting debris are present, and both buttons 16 and 27 are pressed to open the valves 9 and 10. As a result, the compressed air jetted from the jet port 11 scatters the cutting dust, and the scattered cutting dust is sucked from the suction port 7. Also, when removing cutting scraps rubbed against the wall surface inside the hole due to drilling,
It is effective to alternately press the buttons 16 and 27 to momentarily concentrate the injection force or the suction force.

As another embodiment of the air gun according to the present invention, as shown in FIG. 3, the injection passage 6 may be housed in the suction passage 2. In this embodiment, when applied to a flat surface portion such as dust removal at a corner portion, the suction port 7 is provided with an injection port 11 to prevent dust and the like from scattering.
It is desirable that the injection port 11 protrudes further forward than the suction port 7 so that the injection port 7 can be inserted into the hole when applied to a deep hole portion such as removal of cutting chips in the hole. It is desirable to project forward, and it is desirable that the suction port has a diameter larger than the hole diameter so as to cover the hole.

[0016]

The air gun according to the present invention has a front end facing the exhaust port side and a base end side through the first valve in the middle of the suction passage having the suction port at one end and the exhaust port at the other end. An injection nozzle that communicates with the introduction passage is connected, and a branch passage that branches from the air introduction passage is connected to an injection passage that has an injection port at its tip that is substantially parallel to the suction passage via a second valve. Therefore, if both valves are opened, the cutting dust can be scattered and sucked by the injection, and the cutting dust does not bounce due to the jet flow, and the work can be performed safely. Further, if the valves are alternately opened, the energy of the compressed air can be concentrated on either injection or suction, and the cutting waste rubbed against the side wall inside the hole during drilling is removed. It is possible.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an air gun according to the present invention.

FIG. 2 is a cross-sectional view of the air gun shown in FIG.

FIG. 3 is a vertical sectional view showing another embodiment of the air gun according to the present invention.

FIG. 4 is a vertical sectional view showing a conventional air gun.

5 is a sectional view showing a state where a valve of the air gun of FIG. 4 is opened.

6 is a cross-sectional view showing a state where the valve of the air gun of FIG. 4 is closed.

[Explanation of symbols]

 1 Air Gun Main Body 2 Suction Passage 4 Compressed Air Introduction Passage 6 Injection Passage 7 Suction Port 8 Exhaust Port 9 First Valve 10 Second Valve 11 Injection Port

Claims (4)

(57) [Scope of utility model registration request] 1. A suction passage having a suction port at one end and an exhaust port at the other end, and an injection nozzle having a nozzle tip facing the exhaust port side is installed in the middle of the suction passage, and a base end of the injection nozzle. The side is connected via a first valve to a compressed air introduction passage that receives the supply of compressed air from a compressed air supply unit, and the compressed air introduction passage is provided with a branch passage, and the branch passage is the second valve. Is connected to an injection passage having an injection port at the tip, the injection passage is substantially parallel to the suction passage, and the injection port at the tip is opened in the vicinity of the suction port. Airsoft to do. 2. The first valve and the second valve,
The air gun according to claim 1, wherein the air gun is controlled to be opened and closed by operating a push button. 3. The first valve is provided in a direction traversing a central axis of the suction passage, and the second valve is provided in a direction parallel to the central axis of the suction passage. The air gun according to claim 1 or 2. 4. The air gun according to claim 1, wherein the injection passage is contained in the suction passage.