WO2012011647A1

WO2012011647A1 - Air coupler

Info

Publication number: WO2012011647A1
Application number: PCT/KR2011/000758
Authority: WO
Inventors: 박현규
Original assignee: Park Hyun Gyu
Priority date: 2010-07-21
Filing date: 2011-02-07
Publication date: 2012-01-26
Also published as: KR101011459B1

Abstract

The present invention relates to an air coupler. A coupling part (11a) of a plug (2) has a straight-line shape. Also, a coupling hole (22a) of a coupling ring (20a) coupled to the coupling part (11a) has a straight-line shape without having an inclined portion. Thus, the coupling part (11a) is linearly coupled to the coupling ring (20a) at a length of about 5 mm to about 10 mm to prevent the plug (2) and a socket (3) from shaking. Since the coupling part (11a) has the straight-line shape, not an inclined structure, and a coupling error between the coupling part (11a) and the coupling ring (20a) ranges from about 0.03 mm to about 0.1 mm, oil, dusts (or motes, chips, burrs, residue, etc.), or foreign substances stained on the surroundings thereof are not introduced into a coupling hole (18). Thus, a life cycle of the air coupler may be extended and the coupling part (11a) and the coupling ring (20a) may be quickly and precisely coupled to each other. In addition, the air coupler may be commonly used, and a packing may be disposed on a portion of the socket coupled to the plug to provide complete sealing, thereby preventing sealing from being broken.

Description

Air coupler

The present invention relates to an air coupler (air coupler), and in particular, the plug and the socket is coupled to the long straight line without the inclined surface is coupled to the flow and dust (or dust, chips, burrs, debris, etc.) or It prevents the inflow of foreign materials, induces firm coupling, and can be used universally in existing sockets with inclined surfaces.In addition, a packing is installed in the coupling portion where the plug and socket are coupled to ensure tight sealing. I) to be made.

In general, machinery or tools that use air (compressed air) (hereinafter referred to as 'pneumatic mechanism') can easily connect the hose connected to the pneumatic mechanism and the pneumatic hose (the hose supplied with compressed air), or the pneumatic mechanism and the pneumatic hose. An air coupler composed of a plug and a socket (coupler main body) to be detachably used is used.When the plug and the socket are connected, compressed air is delivered, and when the plug and the socket are disconnected, the compressed air is shut off. Valve) is built in, and the configuration of supplying or blocking air is variously used.

Conventional air couplers are sealed because most O-rings (rubber rings) cannot be precisely coupled at the center when they are plugged and socketed, so they are coupled in a tilted and / or flowable state (tilted or slanted at the time of initial coupling). The O-ring is worn or easily separated from its position. In other words, when the plug is coupled to the socket, there is no catching part or a catching surface of the coupling part of the plug, which is composed of a short flat part and a slanting part, so that the plug is not accurately combined with the O-ring.

In addition, the conventional air coupler is exposed to the inside of the socket, when the plug and the socket is coupled, dust (or dust, chips, burrs, Residues, etc.) and foreign matters stick to each other, and in this state, the plugs and sockets are combined, which prevents accurate coupling or quick coupling. There is a problem of shortening, there is also a problem such as a lot of air leakage due to the opening and closing guide and the gap to open and close by the coupling or flow and movement and strong pressure of the air.

For example, FIG. 1 is an exploded perspective view of a conventional air coupler 1 shown as an example, and FIG. 2 is a cross-sectional view of the plug 2 and the socket 3 of the conventional air coupler 1 coupled to each other. ) Is provided with a through hole 5 having a predetermined inner diameter in the cylindrical body 4, which is rather long, and has a plurality of inclined portions 7 so that a hose can be coupled to an outer circumferential surface of one side of the body 4. Balls are formed at intervals, the coupling portion 11 consisting of the inclined portion 9 and the flat portion 8 is formed on the other outer peripheral surface of the body 4, the ball is installed on the socket 3 on one side of the inclined portion 9 A coupling groove 10 having an outer diameter smaller than that of the inclined portion 9 is formed so that the 17 may be coupled to the socket 3.

The socket 3 has a fastener 12 to which the plug 2 is coupled, a sleeve 23 to move when the plug 2 and the socket 3 are separated / engaged, and the plug 2 is separated. It is composed of a valve (29) for closing the air passage (53) to prevent air leakage, and a connector (47) to which a hose or a pneumatic mechanism is connected, the valve (29) inside the fastener (12) Is coupled to the outer surface of the fastener 12, the sleeve 23 and the first spring 28 is coupled, and then the connector 47 is fastened.

The fastener 12 is formed at the tip of the outward protrusion 14 formed in the front end, the plug (2) coupling hole 18 formed in the body, and the coupling hole 18 to the second spring (31) The stepped portion 15 and the part of the ball 17, the front end surface of the engaging ring 20 is carried out is projected into the coupling hole 18 to be caught in the coupling groove 10 of the plug (2) A plurality of through holes 16 coupled to each other, a screw portion 13 formed on the outer circumferential surface of the rear end so that the connector 47 can be fastened, and fastening when the fastener 12 and the connector 47 are fastened or separated. Consists of a fastening groove 14a formed at both ends of the protruding portion 14 so that the tool can be coupled.

A coupling hole 22 is formed in the coupling ring 20, and the coupling hole 22 has a flat portion 19 to which the flat portion 8 and the inclined portion 9 of the plug 2 are respectively coupled. And the inclined portion 21 is formed. The flat portion 8 of the plug 2 and the flat portion 19 of the coupling ring 20 are coupled, and the inclined portion 9 of the plug 2 and the inclined portion 21 of the coupling ring 20 are Combined.

The valve 29 coupled to the rear end of the coupling hole 18 of the fastener 12 includes a movable body 30, a second spring 31, a valve body 32, and a plurality of O-

rings

33 and 34. 35).

The movable body 30 is formed at the tip of the body 36 outwardly projecting portion 37 is formed around, the through hole 38 which is open to the tip in the interior of the body 36 is formed, the rear end of the through hole 38 is a curled portion (39) The structure is blocked by a), the plurality of pores 40 and the through hole 38 formed on the side of the body 36 is connected to each other.

A coupling hole 41 is formed at the distal end of the through hole 38 to which the flat portion 8 of the plug 2 is coupled, and a protruding frame 42 and a concave frame are formed on the outer circumferential surface of the body 36. O-ring 33 is coupled to the outer surface of the valve body 32, the second spring 31 is fitted to the coupling hole 43 of the valve body 32 is coupled to the slide movement is configured, The front end of the second spring 31 is caught on the rear side of the protrusion 37, and the rear end of the second spring 31 is fitted to the body of the valve body 32 and then caught on the protrusion 45 of the rear end of the body to move the movable body 30. ) And the coupling ring 20 are tipped in the tip direction.

O-ring 34 is coupled to the indentation groove formed in the projection 45 of the valve body 32 is in close contact with the inner circumferential surface of the coupling hole 18 of the fastener 12, the rear end body 36 of the pore 40 O-ring 35 is coupled to the inlet frame 46 formed on the outer surface. That is, the O-ring 33 and the O-ring 35 are located at both sides of the pores 40 to open or close the air passage 53.

The sleeve 23 and the first spring 28 are fitted to the outer surface of the fastener 12 to which the valve 29 is coupled, and then the connector 47 is fastened. That is, the threaded portion 49 formed on the inner circumferential surface of the through hole 48 of the connector 47 is fastened to the threaded portion 13 on the outer circumferential surface of the fastener 12.

The sleeve 23 has a ring shape, and one or a plurality of scratches 24 are formed on the outer surface so that the socket 3 and the plug 2 can be easily slid when the socket 3 and the plug 2 are separated. Pressurizing portion 26 to protrude into the through hole 16 to maintain the engaged state of the plug (2) is formed around the pressure is formed around the pressing portion 26, the pressing portion of the pressing portion 26 A coupling hole 27 having a larger inner diameter is formed, and the protrusion 14 of the fastener 12 is coupled, and a coupling hole 25 having a larger inner diameter than the pressing portion 26 is formed at the rear end of the pressing part 26. ) Is formed and the first spring 28 is coupled.

The rear end of the connector 47 is formed with a vent hole 52 is connected to the air passage 53 so that the compressed air can be discharged, the outer peripheral surface screw portion 50 and the coupling portion 51 for fastening the air tool, etc. ) Is formed.

When the plug 2 is coupled to the socket 3 as shown in FIG. 2, the front end portion of the plug 2 pushes the coupling ring 20 held by the second spring 31, and thus, the first spring 28. The ball 17, which has been in contact with the outer surface of the coupling ring 20 in the state in which the force is applied in the forward direction by the pressurizing portion 26, presses the backward portion of the coupling ring 20 and the pressing portion 26. By moving to the center of the coupling hole 18 by engaging and engaging the engaging groove 10 of the plug (2) is maintained in the engaged state, and also the movable body of the valve 29 by the backward of the coupling ring 20 H) that the pore 40 and the vent hole 52 are connected and the air passage 53 is opened and the connector 47 is connected while the O-ring 35, which is in close contact with the rear surface of the valve body 32, moves backward while Or air is supplied to the pneumatic device.

Therefore, air flows through the through hole 5 of the plug 2 to the through hole 38 of the movable body 30 to the hole 40 to the air hole 52 to the hose or the pneumatic mechanism. Of course, depending on the conditions, the air may be configured to flow to the pneumatic mechanism through the vent hole 52, the hole 40, the hole 38 of the movable body 30, and the hole 5 of the plug 2 in the opposite direction. .

The protrusion frame 42 formed on the outer circumferential surface of the movable body 30 is coupled to the coupling hole 43 of the valve body 32 so that the distance between the movable body 30 and the valve body 32 when the movable body 30 moves is The O-ring 33 coupled to the outer circumferential surface of the movable body 30 is tightly coupled to the coupling hole 43 of the valve body 32, and the rear end of the valve body 32 is a stepped portion 54 inside the connector 47. ) Is supported while the movement is prevented, and the O-ring 34 coupled to the outer surface of the valve body 32 is in close contact with the coupling hole 18 of the fastener 12.

In addition, when the sleeve 23 carried by the first spring 28 is moved toward the connector 47 in order to separate the socket 3 and the plug 2, the pressing part 26 moves backward to the ball 17. The pressing force against the member is removed, and the movable member 30 supported by the second spring 31 moves forward while the ball 17 is pushed outward to contact the outer peripheral surface of the movable member 30, thereby releasing the locking of the plug 2. The plug 2 and the socket 3 are separated, and the coupling ring 20 is caught by the step 15 so that further movement is suppressed, and the movable body 30 is advanced by the second spring 31. Since the O-ring 35 at the rear end is in close contact with the inclined surface 55 of the valve body 32, the pores 40 and the vent holes 52 are blocked and the open passage 53 is closed.

On the other hand, the conventional air coupler (1) is in a tilted state and / or flow because the O-

rings

33 and 34 can not be accurately coupled in the center when the plug (2) and the socket (3) is coupled O-

rings

33 and 34 are worn or easily detached from position as they are engaged in a state. That is, when the plug 2 is coupled to the socket 3, there is almost no part or surface to hold the coupling portion 11 composed of the short flat portion 8 and the inclined portion 9, so that the plug 2 is severely coupled. While flowing, the O-

rings

33 and 34 are not precisely coupled to the structure.

In the conventional air coupler 1, when the plug 2 and the socket 3 are coupled to each other, a lot of dust or foreign substances are generated due to the action of oil or static electricity on the fastener 12 of the socket 3 or its surroundings. Since they are coupled in the attached state, not only the precise coupling or the quick coupling is made, but also the O-ring that maintains the airtightness of the fastener 12 and the coupling part 11 is damaged and the life is shortened. There are a lot of air leakage due to the opening and closing guide and the gap opening and closing by the flow and movement, there is a problem such that the air pressure is partly leaked due to the airtightness.

In the present invention, by removing the inclined portion of the coupling portion and the coupling ring to be linearly coupled long to prevent the flow and foreign matter when the plug and socket are combined to achieve a quick and accurate and robust coupling, the plug and socket is coupled The packing is additionally installed in the coupling portion to make a rigid airtight (氣密) is made, it is configured to be used universally in the existing socket formed inclined portion.

That is, an object of the present invention is to provide an air coupler in which the plug and the socket of the air coupler is coupled to the linearly long portion without the inclined surface to prevent the flow and foreign material inflow when the plug and socket are coupled to achieve a rigid coupling. have.

Another object of the present invention is characterized in that the packing is additionally installed in the coupling portion to which the plug and the socket are coupled to make a rigid airtight (氣密).

Another object of the present invention is characterized in that it can be used universally by coupling the plug of the present invention to the existing socket formed slope.

The present invention provides an air coupler in which a plug and a socket are separated from each other, and a valve is provided in the socket, wherein the recess 30 is formed on the inner peripheral surface of the movable body 30 of the valve and the distal end of the coupling hole 41 of the movable body 30. ), And the packing 60 is coupled to the concave groove (59).

The packing 60 has a flat portion 63, an inner wing portion 65 and an outer wing portion 66 formed on the opposite side of the flat portion 63 and gradually thinner as they move toward the end portion. , A space portion 67 formed between the inner wing portion 65 and the outer wing portion 66.

It further comprises a stepped portion 64 formed on the outer circumferential surface of the outer wing portion 66 of the packing 60.

According to the present invention, in the air coupler in which the plug and the socket are separated and the valve is provided in the socket, a linear coupling portion 11a is formed at the rear end of the plug 2 and the coupling ring 20a installed in the socket 3 is provided. The linear coupling hole (22a) is formed in the interior of the linear coupling portion (11a) is characterized in that the coupling.

The coupling portion 11a further includes a protrusion 6 which isolates the coupling groove 10 and the coupling portion 11a.

In the present invention, the coupling length of the coupling portion 11a and the coupling ring 20a is 5 mm to 10 mm, and the coupling error (gap) between the coupling portion 11 a and the coupling ring 20 a is up to 0.03 mm to 0.1 mm. It is configured to manufacture high precision air coupler.

According to the present invention, the plug and the socket of the air coupler are linearly coupled without the inclined surface, thereby preventing the flow and the inflow of foreign materials when the coupling is achieved, thereby achieving a fast and accurate coupling, and preventing wear of valves and O-rings, thereby extending the service life. It is effective.

In addition, the present invention has an effect that the packing is installed in the coupling portion to which the plug and the socket are coupled to achieve a rigid airtightness of the coupling portion.

In addition, in the present invention, since the length of the coupling portion 11a is increased to 5 mm to 10 mm without the

inclined portions

9 and 21 in the coupling portion 11a and the coupling ring 20a, linear precision coupling is achieved. The coupling error (gap) between the portion 11a and the coupling ring 20a can be reduced to 0.03 mm to 0.1 mm, thereby producing an air coupler with high precision.

In addition, the present invention is coupled to the fastener 12 because the coupling error (gap) is very small, there is no flow, that is, shaking from the beginning of the coupling to the completion of the coupling, and the plug 2 and the socket 3 are coupled at right angles and linearly. Oil or dust (or dust, chips, burrs, debris, etc.), foreign matters, etc., which are attached to the tip of the ring 20a do not flow, so that the bonding strength and airtightness do not fall, and wear is prevented, thereby extending the service life.

In addition, the present invention is a very useful invention that can be used universally by combining the plug of the present invention to the existing socket formed slope.

1: An exploded perspective view of a conventional air coupler.

2 is a cross sectional view of a conventional air coupler.

3 is a perspective view of a partially cut coupling ring of the conventional air coupler.

4 is a perspective view of the cut portion of the plug coupling portion and the coupling ring shown as an example of the present invention.

Figure 5 is an exemplary view of the packing portion incision coupled to the moving body in the present invention.

6 is a cross-sectional view before coupling of the plug and socket shown as an example of the present invention.

7 is a cross-sectional view of the coupling state of the plug and the socket shown as an example of the present invention.

(1) (1a)-air coupler (2)-plug

(3)-Socket (4) (36)-Body

(5) (16) (38) (48) (62)-Through Hole (7) (9) (21)-Inclined

(8) (19) (63)-plane (10)-engagement groove

(11) (11a) (61)-Joining Part (12)-Tightening Sphere

(13) (49) (50)-Thread (14) (37) (45)-Protrusion

(14a)-Tightening Groove (15) (54) (58)-Joint

(17)-Ball (20) (20a)-Joining Ring

(18) (22) (22a) (25) (27) (41) (43)-Joins

(23)-Sleeve (24)-Scratch

(26)-Pressing Unit (28)-First Spring

(29)-valve (31)-second spring

(30)-moving body (32)-valve body

(33) (34) (35)-O-Ring (39)-Maguribu

(40)-Pore (42)-Extrude

(47)-Connector (51)-Coupling

(52)-Aerator (53)-Ciro

(59)-Indentation Groove (60)-Packing

(65) (66)-wings (67)-space

(A) (B)-Air

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the embodiments of the present invention, the same components in the drawings are denoted by the same reference numerals as much as possible, and detailed descriptions of related known configurations or functions will be omitted so as not to obscure the subject matter of the present invention.

4 to 7 is a view of the air coupler (1a) shown as an example of the present invention, the coupling portion (11a) of the plug 2 is configured in a straight line, the coupling ring 20a is coupled to the coupling portion (11a) The coupling hole 22a of the) is also configured in a straight shape without an inclined portion so as to be linearly long (5 mm to 10 mm) to be coupled to prevent the flow of the plug 2 and the socket 3 during the coupling, and the coupling portion 11a. Since the straight structure is not an inclined structure, oil or foreign matters buried around the fastener 12 and the fastener 12 are not introduced into the coupling hole 18, thereby extending the service life and achieving fast and accurate coupling.

That is, in the case of the conventional air coupler 1 shown in Figs. 1, 2 and 3, the plug 2 until the short plane portion 8 completely enters the plane portion 19 of the coupling ring 20. The flow of the structure is inevitable, and the inclined portion 9 of the plug 2 only enters the inclined portion 19 of the coupling ring 20 until the flow is prevented. In addition, the conventional air coupler 1, oil or dust (or dust, chips, burrs, debris, etc.), foreign matter between the inclined portion 9 of the plug 2 and the inclined portion 21 of the coupling ring 20 While the adhesion and airtightness decreases while the back flows, the air coupler 1a of the present invention is coupled to the fastener 12 and the coupling ring by a straight coupling portion 11a extending about twice as long. Oil or dust (or dust, chips, burrs, debris, etc.), foreign substances, etc., attached to the tip of 20a do not flow into the coupling hole 18 and the coupling hole 22a of the coupling ring 20, so that the binding force and airtightness It does not fall, and wear and the like are prevented to extend the service life.

In addition, in the case of the conventional air coupler 1, there is a problem in that the airtightness in the portion where the plug 2 and the socket 3 are coupled while leaking, especially in the case of air above a certain pressure, the air coupler 1a of the present invention is shown in FIG. 7 to form a concave groove 59 provided with a stepped portion 58 on the inner circumferential surface of the distal end of the coupling hole 41 as shown in FIG. 7, and then install the packing 60 having a double sealed structure. The rigid airtight of the part 61 is maintained, and the air leakage more than a certain pressure is also prevented.

The packing 60 has an O-ring shape in which a through hole 62 is formed in the center thereof, and includes a flat portion 63 coupled to the recessed groove 59 and a stepped portion coupled to the stepped portion 58. (64) is formed on the outer circumferential surface, a pair of

wings

65, 66 are formed integrally on the opposite side of the flat portion 63, the outflow air is received between the wings (65, 66) The space portion 67 is formed.

The packing 60 is made of synthetic rubber or synthetic resin of tough and soft properties to withstand high pressure air, and the

wing portions

65 and 66 have a "V" shape that becomes thinner gradually as it moves toward the end. 5, the inner wing 65 is inclined inward, and the outer wing 66 is inclined in the outward direction and faces in the opposite direction to which the plug 2 is coupled. Structure. Therefore, when the plug 2 is coupled, it is easily coupled without interference, and as the pressure of the air B introduced into the recess 59 of the packing 60 increases, the adhesion and airtightness of the

wings

65 and 66 become larger. This becomes more stubborn and there is no leakage of air.

6 is a cross-sectional view of the packing 60 coupled to the recess 59, and before the plug 2 is engaged.

The packing 60 is coupled to the concave groove 59, so that the

wing parts

65 and 66 face in the opposite direction in which the plug 2 is inserted, and the stepped portion 64 of the packing 60 moves. By locking the stepped portion 58 of the 30, even if the coupling portion 11a of the plug 2 is coupled, the packing 60 does not move in the direction in which the plug 2 is coupled.

The outer wing 66 of the packing 60 coupled to the recess 59 is in close contact with the inner circumferential surface of the recess 59, and the inner wing 65 protrudes in the direction of the coupling hole 41.

7 is a cross-sectional view of a state in which the plug 2 and the socket 3 are coupled in the present invention, in the direction of the coupling hole 41 by the coupling portion 11a of the plug 2 coupled to the coupling hole 41. As the inner wing 65 of the protruding packing 60 comes into close contact with the surface of the engaging portion 11a, rigid airtightness of the engaging portion 61 is achieved, and the inner wing 65 and the outer wing portion The outer circumferential surface of the 66 is parallel or close to parallel, and the moving body 30 of the valve 29 moves backward so that the pores 40 and the vent holes 52 are connected to each other to form a closed passage 53. .

Therefore, the air A supplied to the plug 2 is moved in the direction of the arrow and supplied to the hose or pneumatic mechanism connected to the connector 50.

At this time, since the rigid airtightness of the coupling part 61 is maintained by the packing 60 installed at the tip of the coupling hole 41 of the movable body 30, air B leaks through the gap of the coupling part 61 as shown in FIG. 7. ) Flows into the space portion 67 of the packing 60, but the outer wing portion 66 in close contact with the inner circumferential surface of the concave groove 41 and the inner wing portion 65 in close contact with the outer circumferential surface of the engaging portion 11a. Air leakage is prevented, and there is no damage to the packing 60 and the wear of the parts constituting the socket 3 is extremely low, thereby greatly extending the service life.

In addition, as the pressure of the air B introduced into the space portion 67 increases, the adhesion of the

wings

65 and 66 increases, thereby preventing air leakage.

Since the present invention has no configuration of the inclined portion 9 in the coupling portion 11a of the plug 2, the coupling portion 20 is coupled to the socket 3 of the conventional air coupler 1 in which the inclined portion 21 is formed on the coupling ring 20. There is general versatility available.

In the present invention, since the length of the coupling portion 11a is longer without the

inclination portions

9 and 21 in the coupling portion 11a and the coupling ring 20a, linear precision coupling is achieved, so that the coupling portion 11a is coupled with the coupling portion 11a. The coupling error (gap) between the rings 20a can be reduced to 0.03 mm to 0.1 mm to produce a high precision air coupler, and the coupling error (gap) is very small and flows from the initial coupling to the completion of the coupling, That is, there is no shaking, and the plug 2 and the socket 3 are coupled to each other at right angles and in a straight line. Therefore, oil or dust (or dust, chips, burrs, and debris) on the tip of the fastener 12 and the coupling ring 20a Etc.), foreign matters, etc. are not introduced, so that the bonding strength and airtightness are not impaired, and wear is prevented to extend the service life.

In the case of the conventional air coupler (1), due to the inclined portion structure and the flow structure is difficult to precisely combine when combined with a short service life, the present invention is the inclined portion (9) (21) to the coupling portion (11a) and the coupling ring (20a) ), The length of the coupling part 11a is long, and the coupling part 11a is linearly long (5 mm to 10 mm) coupled to the coupling hole 22a of the coupling ring 20 without flow, and then packing ( 60) fast and precisely coupled, airtight and high precision air coupler. In addition, since the straight coupling portion 11a is about twice as long and is coupled at right angles without flow (no flow, i.e., no shaking, from the initial coupling to the completion of the coupling), the front end of the fastener 12 and the coupling ring 20a. Oil or dust (or dust, chips, burrs, debris, etc.), foreign substances, etc. adhered to the coupling hole 18 and the coupling hole 22a of the coupling ring 20 do not flow into the coupling force and airtightness, and thus, wear and tear are not reduced. This is prevented and the service life is extended. 6C is a curved surface of the

coupling portion

11a, and 6 is a protrusion for separating the coupling groove 10 and the coupling portion 11a.

The present invention described above is not limited to the present embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible without departing from the technical spirit of the present invention, and this is in the technical field to which the present invention belongs. It is self-evident for those of ordinary knowledge.

Claims

The plug 2 and the socket 3 to be separated and coupled, the sleeve 23 which is carried with a spring so that the plug 2 and the socket 3 can move when the plug and the socket 2 are separated, and the plug 2 is separated. A valve 29 in the socket 3 for closing the 53 to prevent air leakage, a coupling ring and a movable body 30 installed inside the valve 29, and a coupling hole formed in the movable body 30. An air coupler composed of 41;

A recess groove 59 is formed in the inner circumferential surface of the distal end of the coupling hole 41 of the movable body 30,

The packing 60 is coupled to the recess 59,

The packing 60 is,

A flat portion 63 coupled to the concave groove 59;

An inner wing portion 65 and an outer wing portion 66 formed on the opposite side of the plane portion 63 and gradually thinner as the transition to the end portion;

A space portion 67 formed between the inner wing portion 65 and the outer wing portion 66,

Air coupler comprising a.
The method according to claim 1;

Air coupler further comprises a stepped portion (64) formed on the outer circumferential surface of the outer wing (66).
The plug 2 and the socket 3 to be separated and coupled, the sleeve 23 which is carried with a spring so that the plug 2 and the socket 3 can move when the plug and the socket are separated, and the plug 2 are separated. The valve 29 inside the socket 3 to close the 53 to prevent air leakage, the coupling ring and the movable body 30 installed inside the valve 29, and the coupling hole formed in the movable body 30. An air coupler composed of (41);

A straight coupling portion 11a is formed at the rear end of the plug 2,

Air coupler, characterized in that to form a linear coupling hole (22a) in the interior of the coupling ring (20a) installed in the socket (3) to be coupled to the linear coupling portion (11a).
The method according to claim 3;

The coupling length of the coupling portion 11a and the coupling ring 20a is 5 mm to 10 mm, and the coupling error between the coupling portion 11 a and the coupling ring 20 a is 0.03 mm to 0.1 mm. .