JPH0338268A - Air filter built-in type air gun - Google Patents

Abstract

PURPOSE:To suppress an increase in cost by arranging a cylindrical air filter to the outer periphery of a cylinder and forming an air inflow passage to the outer periphery of said filter. CONSTITUTION:When an operating lever 3 is pulled, a cooperating lever 31 presses a cap 22 and a valve rod 16 is pushed down against the elastic force of a spring 24. When the compressed air from a compressed air connection port 32 enters a cylindrical air filter 10 from the outer peripheral surface thereof through an air passage, the dust, water and oil in the compressed air are removed. Thereafter, the compressed air passes through a large number of the small holes 8a of a cylinder 8 to enter a gap part 19 from the upper end of a cavity 5 and passes through an air passage 35 to be injected as clean air from a nozzle 2. Since the drain valve 27 provided to the lower part of the valve rod 16 closes a valve seat 29 at the same time, the water accumulated in the lower part of a water sump part 36 passes through valve seats 28, 29 and a passing hole 30 instantaneously to be drained from a drain port 26. By this method, water drainage becomes unnecessary.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an air gun with a built-in air filter that cleans parts, equipment, etc. in the manufacturing process by spraying clean air from which water, oil, and dirt have been removed. .

(Prior art) Air guns are used to clean dust attached to parts and cases during the manufacturing process of semiconductors such as ICs. A planar filter is disposed in the upper and lower parts of the cylindrical base, or a cartridge type filter is disposed in the middle of the cylinder as shown in FIG. 4 of the prior art.

(Problem to be Solved by the Invention) However, in the above-mentioned conventional technology, the space in which the filter is disposed is small, making it impossible to sufficiently remove dust, water, oil, etc. contained in the air, and There was a problem with water gushing out.

Therefore, conventionally, as shown in FIG. 3, compressed air from a compressor 50 is guided to an air dryer 51 to remove moisture, and further led to an air unit 52 to remove oil.
Although the pressure was adjusted and guided to the air gun 53, there was a problem in that it required an air dryer and an air unit, making the entire device expensive.

(Means for Solving the Problems) The present invention aims to solve the above problems, and a cylindrical air filter is arranged on the outer periphery of a cylinder having a plurality of through holes in the peripheral wall arranged at the center of the main body grip. However, an air inflow path is formed on the outer periphery, and a valve for opening and closing the nozzle is provided in the cylinder in conjunction with a lever.

(Function) When the operating lever is pressed, the valve stem is pushed, and the compressed air that enters the inside from the outer circumference of the cylindrical filter installed in the grip is continuously injected from the nozzle and at the same time accumulates under the grip. The water in the compressed air is instantly drained from the drain port.

(Example) Next, a detailed description will be given based on the illustrated example. Reference numeral 1 denotes a cylindrical body with a nozzle 2 attached to its tip and an operating lever 3 attached to the middle lower part so as to be able to rotate back and forth. Reference numeral 4 denotes a cylindrical grip part protruding downward from the base of the cylinder 1, which has a screw hole 6 and an annular step 7 coaxially formed in the center of the upper end of the cavity 5, and has a large number of small holes 8a on the outer periphery. They are screwed together, and the upper end of the cylindrical filter 10 is fitted into the annular step 7. Reference numeral 11 denotes a cylindrical holder disposed in the middle part of the cavity 5, a collar 12 having a number of vertical grooves 12a on the outer periphery is fitted and fixed on the inner surface of the cavity 5, and a lower end of the filter 10 is fitted and fixed on the annular step 14. , the lower end of the cylinder 8 is screwed into the screw hole 15. Reference numeral 16 denotes a rod-shaped valve stem, which is disposed coaxially within the cylinder 8 with a slight gap, and an upper narrow diameter portion 17 protrudes from the through hole 18 at the upper end of the cavity 5, and the upper end of the cylindrical cavity 19 above it. The cap 22 is fitted into the center hole 21 of the stopper 20 and protrudes from the upper end, and the cap 22 is screwed and fixed to the upper end.
A spring 24 is attached between the bottom surfaces and always urged upward, and a backing 25 fixed to the step 6a of the valve stem 16 is pressed against the upper end of the cavity 5, closing communication between the cavity 5 and the cavity 19.

The valve stem 16 protrudes downward from the holder 11 and fits into the drain port 26 at the center of the lower end of the cylinder body 1, forming an intermediate brim-shaped drain valve 27, the upper surface of which is in constant pressure contact with the upper valve seat 28, and the lower surface The lower valve seat 29 faces the lower valve seat 29 at a small distance corresponding to the lower valve seat 29. The valve stem below the drain valve 27 has a through hole 3 that communicates with the lower surface from the outer periphery.
0 is formed. 31 is an interlocking lever that is interlocked with the operating lever 3 and presses the cap 22.1 A compressed air connection port 3 that communicates with a compressed air cylinder 33 is provided on the rear surface of the upper part of the grip part 5.
2 is provided. 34 is an air passage that communicates with the cavity 5, 35 is an air passage that communicates the cavity 19 with the nozzle 2, and 36 is a water reservoir in the lower part of the cavity 5.

Next, the effect will be explained.

When the operating lever 3 is pulled, the interlocking lever 31 presses the cap 22 and pushes the valve stem 16 downward against the elasticity of the spring 24, so that the backing 25 of the step 6a is separated from the upper end of the cavity 5, and is removed from the compressed air connection port 32. When the compressed air enters the inside from the outer peripheral surface of the cylindrical air filter 10 through the air passage 34, it removes dust, water, oil, etc. from the compressed air, passes through a large number of small holes 8a of the cylinder 8, and enters from the upper end of the cavity 5. Clean air enters the cavity 19, passes through the air passage 35, and is injected from the nozzle 2. At the same time, the drain valve 2 at the bottom of the valve stem 16
7 opens the valve seat 28 and closes the lower valve seat 29, so that the water that has accumulated at the bottom of the water reservoir 36 during this short period of time is instantaneously removed by the compressed air that is injected into the water reservoir 36 from the vertical groove 12a of the collar 12. Valve seat 28. The water passes through the valve seat 29, passes through the through hole 30 at the lower end of the valve stem 16, and is drained from the drain port 26. That is, every time the operating lever 3 is pulled, the moisture in the compressed air accumulated in the water reservoir 36 is instantly discharged.

(Effects) According to the present invention, a cylindrical air filter is disposed on the outer periphery of a cylinder having a large number of through holes in the peripheral wall arranged at the center of the main body gripping part, an air inflow path is formed on the outer periphery, and the cylinder Since the is equipped with a valve that opens and closes the nozzle in conjunction with the lever, dirt, water, oil, etc. can be completely removed using the wide area of the outer peripheral surface of the cylindrical filter. Every time you press , you can instantly drain the water that has accumulated below, which is convenient because you don't have to go to the trouble of draining the water.

[Brief explanation of drawings]

FIG. 1 is a front cross-sectional view of an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a block diagram of a conventional device. l...Cylinder 2...Nozzle 3...Operation lever 4...Gripping part 5...Cavity 8...Cylinder 8a...Small hole 10...Filter 16...Valve stem 19...Gap 24...Spring 26...Drain port 27...Drain valve 28.29...Valve seat 31...Interlocking lever 32...Compressed air connection port 33...Compression Air cylinder 34.35...Air passage 36...Water reservoir

Claims (2)

[Claims] (1) A cylindrical air filter is arranged around the outer periphery of a cylinder that has a number of through holes in the peripheral wall arranged at the center of the main body grip, an air inflow path is formed on the outer periphery, and the cylinder has a cylinder that is connected to a lever. An air gun with a built-in air filter that features a valve for opening and closing the nozzle. (2) The air filter according to claim 1, wherein a water reservoir is formed at the bottom of the air passage, the drain port is constantly closed by a valve, and the drain port is instantaneously opened and closed at the same time as air is injected from the nozzle every time the lever is pressed. Built-in air gun.