KR101038481B1 - Air Coupler for preventing twist of hose - Google Patents

Abstract

The present invention relates to an air coupler connected to one end of an air hose and used for quick connection of an air tool that uses compressed air as power. The air hose is frequently twisted in the process of moving or changing a work position while using the air tool. To reduce the worker's work efficiency and increase the fatigue of the wrist caused by the occurrence of the hose twist prevention device purchased and installed separately, but by simplifying the structure to facilitate assembly by including a hose connector that rotates freely It is characterized by the provision of an air coupler that prevents hose kinks.

Hose fittings, air coupler, hose twist prevention, air hose, swivel joint.

Description

Air Coupler for Preventing Twist of Hose

The present invention relates to an air coupler used for quick connection of an air tool, and more particularly to an air coupler comprising means for preventing the air hose from twisting.

Prior arts in this field include Korean Utility Model Registration No. 20-239086 "Air Coupler" and 20-435431 "Air Coupler Assembly". Air couplers are generally used to connect air hoses. That is, the air coupler is used for quick connection and disconnection between air hose connectors.

No. 20-239086 has the effect of preventing the connection of the air coupler is separated by the impact and facilitates the assembly and disassembly of the air coupler, but in the case of existing air couplers including No. 20-239086 In order to prevent hose twisting, a separate hose twist lock had to be provided. And if it is necessary to prevent the hose twist more reliably and need a wider range of rotation, purchase the swivel joint, combine the air tool and the swivel joint, and then attach the air tool connector to the combined swivel joint again. Used for quick connection.

1 is a cross-sectional view of an air coupler according to No. 20-239086, which shows the characteristics of this prior art.

No. 20-435431 has a relatively free rotation of the air conditioner connector and is expected to prevent the leakage of compressed air to some extent, but it is also rotated to prevent hose kinks only along the longitudinal direction of the air hose. Working at an angle did not fundamentally solve the problem of hose kinks. 2 is a coupled state of the air coupler assembly according to No. 20-435431.

Such a conventional air coupler is integrated with the hose connector, the hose connector had only a function of simply connecting the air coupler and the air hose.

In the assembling process of the air coupler, the upper tube and the lower tube were fastened by screwing, which required a lot of assembly time, and in the case of assembling by crimping, crimping equipment was required, resulting in an increase in production cost. In addition, the cost burden is increased by purchasing a hose twist protector or a swivel joint separately from an air coupler.

In the case of the swivel joint, which was purchased and installed separately, the two rod structures were different, and the rotating body was also different in the two structures, which had to be assembled according to the assembling order.

Today, the use of compressed air is increasing, but various conventional products described above are used.

The present invention has been made in order to provide an air coupler that can solve the inconveniences of the various prior arts described above, and prevents a hose twist that can be bent at an angle while freely rotating in the air coupler body. The purpose is to improve the work efficiency by the configuration including the hose connector, and to simplify the structure to achieve cost reduction by improving the assembly.

Hose anti-twist air coupler according to the present invention for achieving the above object, the upper tube having an inlet for connecting to the air tool connector, the lower tube which is coupled to the upper tube and serves as a compressed air passage, the upper tube And an air coupler that operates inside the lower pipe and controls the flow of compressed air, and an external pipe that operates externally between the upper pipe and the lower pipe, and which can be arbitrarily operated for separation of the air tool connector. It characterized in that it comprises a hose connector for preventing the hose twist in the main body, the fastening of the upper tube and the lower tube is a part of the elastic ring which is partially cut by applying a force in the axial direction without using screw fastening or pressing means By being installed in the fastening ring groove of the upper tube and the lower tube, to maintain a firm fastening The support end of the structure surrounding the upper tube is characterized in that the protruding to the lower tube.

Looking at the effects of the present invention as follows.

First, the air coupler body 200 according to the present invention can be easily assembled as compared to the prior art by simplifying the component structure is improved productivity.

Second, the use pressure of the compressed air is generally 15kg / ㎠ or less, the cross-sectional area of the compressed air is 0.4 cm 2 or less, so the air coupler body 200 according to the present invention is the upper tube 210 and the lower tube 280 The first fastening ring of elastic material partially cut into the fastening ring groove of the upper pipe 210 and the lower pipe 280 by applying a force in the axial direction, not by a separate means including a screw body and a pressing means when 270 is installed and fastened by the locking can be improved assembly speed.

Third, in the present invention, the insertion hole 288 which provides a rotation space and a fixed space at the same time is formed in the lower tube 280 to be mounted to the hose connector according to the need to mount the rotary sphere hose connector 300 according to the present invention If you do not have a separate hose twist prevention device can be freely rotated and bent at a certain angle to prevent the hose twisted to improve the work efficiency.

Fourth, when the swivel joint type hose connector 400 according to the present invention to the insertion hole 288 of the lower tube 280 provides a wider rotation than the rotary tube type hose connector 300, swivel joint type hose connector 400 The two rotating bodies 410 and the two rods 420 of the same shape have the same shape and provide convenience of inventory management and assembly order, thereby improving assembly and reducing production costs. The cost can be reduced compared to purchasing and mounting swivel joints individually.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It should be interpreted as meanings and concepts that match.

≪ Example 1 >

3 is an exploded perspective view of a hose twist prevention air coupler (hereinafter referred to as "air coupler") equipped with a rotary spherical hose connector 300 according to the present invention, Figure 4 is an air tool connector 100 to the air coupler of Figure 3 5 is a cross-sectional view before the air tool connector 100 is connected to the air coupler of FIG. 3, and FIG. 6 is a cross-sectional view of the air tool connector 100 connected to the air coupler of FIG. Is showing.

As shown in FIG. 4, the air coupler according to the present invention includes: an upper tube 210 having an inlet for connecting with the air tool connector 100; A lower tube 280 serving as a compressed air passage coupled to the upper tube 210; Shut-off valve 230 for controlling the flow of compressed air in the interior of the upper pipe 210 and the lower pipe 280 is coupled; An outer tube 220 which operates outside the upper tube 210 and the lower tube 280 and is arbitrarily operable for separation of the air tool connector 100; A sealing ring 260 installed between the upper pipe 210 and the lower pipe 280 to block leakage of compressed air; A stop ball 240 provided at the upper pipe 210 to maintain the connection of the air tool connector 100; An elastic member 250 for maintaining the outer tube 220 at a predetermined position; An elastic member 251 for maintaining the shutoff valve 230 in a position to block compressed air; An air coupler body 200 consisting of a fastening ring 270 that connects the upper pipe 210 and the lower pipe 280 to be fastened to each other and a cylindrical compressed air passage are formed through the central axis of the air hose (not shown). Rotating-type hose connector 300 is characterized in that the ball-shaped rotating sphere 310 is formed on the side inserted into the insertion hole 288 of the lower pipe 280 is connected to the hose connecting pipe 320 and; It is installed in the insertion hole 288 of the lower tube 280 is characterized in that it comprises a fastening ring (271) to prevent and restrain the separation of the rotary spherical hose connector (300).

The upper tube 280 is connected to the inlet inner diameter 211, which is an insertion hole of the air tool connector 100, and ends with a guide inner diameter 216 for guiding the intermittent linear reciprocating shutoff valve 230. Compression end is formed to compress the inlet end step 214 is formed protruding to the outer diameter side of the inlet diameter 211 to prevent the separation of the outer tube 220 and restrained contact ball stop step (214) ( Fastening ring groove provided in the circumferential direction between the inlet end 214 and the crimping end are formed in the radial direction a plurality of cylindrical stop ball installation holes 212 protruding the installation hole projection 213 to prevent the separation of 240 215 is characterized in that it is completely received from the inner diameter to the outer diameter when the fastening ring 270 of the partially cut elastic material for the fastening of the upper tube 210 and the lower tube 280 is contracted.

The lower tube 280 is connected to a cylindrical insertion hole 288 which provides a rotation space and a fixed space of the hose connector at the same time, and serves as a compressed air passage while providing an installation space of the elastic member 251 between the inner diameter 284. A support protrusion 286 is formed at the end of the inner diameter 284 where the sealing ring 260 is installed, and a locking protrusion 286 is formed on the elastic member 251 and the sealing ring 262. End (285) protrudes to maintain a solid fastening of the upper tube 210 and the lower tube 280, the protruding end of the support end 285 to control the separation of the outer tube 220 and the support end (285) The outer diameter side of the support end outer diameter jaw (289) for installing the elastic member 250 is formed, the inner diameter of the support end (285) provided to secure the upper tube 210 and the lower tube 280 firmly and for easy assembly The fastening ring groove 282 facing the fastening ring groove 215 of the upper tube 210 is provided in the circumferential direction fastening ring ( 270 is characterized in that only half is received from the outer diameter to the central diameter and the half is projected from the central diameter to the inner diameter, the fastening ring groove 282 in the fastening ring disassembly for disassembly of the upper tube 210 and lower tube 280 A plurality of holes 281 is formed. In addition, the insertion hole 288 has a fastening ring groove 287 formed in the circumferential direction, characterized in that the fastening ring 271 of the partially cut elastic material is accommodated in the outer diameter to the central diameter and only half is projected from the central diameter to the inner diameter. do.

The shutoff valve 230 is connected to the valve outer diameter 238 of a simple cylindrical structure to block the incoming compressed air to form a guide outer diameter 233 which serves as a linear motion guide at the same time as the position control of the stop ball 240, The inner diameter of the axial compressed air passage formed by forming a valve inner diameter jaw 232 and the end of the diameter smaller than the valve inner diameter 234 is formed in the inner diameter of the valve inner diameter 234 of the diameter close to the diameter of the pressure outer diameter (101) And further provided with a plurality of compressed air passages 236 formed in the radial direction so that the compressed air drawn in through the hose connector is introduced into the air tool 107 under the control of the shutoff valve 230, and one end of the compressed air passage 236 is blocked. The lower groove 237 is formed on the opposite side of the axial compressed air passage to control the clearance of the elastic member 251.

The outer tube 220 is spaced apart from the upper projection jaw 222 to prevent the stop ball 240, which serves to maintain and remove the connection of the air tool connector 100 is separated from the stop ball installation hole 212 While being limited, the lower inner diameter jaw 223 receiving the elastic force of the elastic member 250 is formed.

The sealing ring 260 blocks the leakage of compressed air at the fastening surfaces of the upper pipe 210 and the lower pipe 280, and is also compressed with the shutoff valve 230 to block the flow of compressed air, and the shutoff valve 230. When opened) is characterized in that the leakage of compressed air at the contact surface of the guide inner diameter 216 of the upper tube 210 and the guide outer diameter 233 of the shutoff valve 230.

The fastening ring 270 is an elastic material in which a part of the ring is cut and installed in the fastening ring groove 215 of the upper pipe 210, and then enters the fastening ring groove 282 provided in the lower pipe 280 by applying an axial force. It is simply fastened by the locking, the support end 285 of the lower tube 280 is characterized in that it is firmly fixed to surround the upper tube 280.

Operation of the air coupler having the configuration as described above is as follows.

Rotating hole 310 of the rotary spherical hose connector 300, which includes a hose connecting tube 320 is fixedly connected to the air hose (not shown) extending from the compressed air generator (not shown) is an insertion hole of the lower tube 280 288 is inserted into the air tool 107 through the air coupler body 200 to prevent the hose twisted by being able to be bent at a predetermined angle while interpolating the free rotation.

When the air tool connector 100 is connected to the air coupler main body 200 to use the air tool 107, the shutoff valve 230 must be opened so that the compressed air is introduced into the air tool 107. Thus, the valve inner diameter jaw 232 is formed such that the shutoff valve 230 moves like the end 104 of the pressure outer diameter 101 entering the air coupler main body 200. The end 104 of the pressure outer diameter 101 presses the valve inner diameter jaw 232 of the shutoff valve 230 to open the shutoff valve 230 and is connected to the valve inner diameter 234 of the shutoff valve 230. Compressed air is introduced into the plurality of compressed air passages 236 formed on the side surface. Figure 3 shows a case of four compressed air passages 236 on the side. When the inclined groove 102 enters the position of the stop ball installation hole 212, the stop ball 240, which is freed from the restraint of the end of the guide outer diameter 233, enters the inclined groove 102 and is constrained to restrain the air coupler body 200. And the air tool connector 100 is connected.

The pressure outside diameter 101 of the air tool connector 100 of FIG. 6 and the sealing ring 261 are in close contact with each other, and the compressed air passage 105 in which the compressed air introduced into the air coupler body 200 is connected to the air tool 107 is provided. Not leaking through the contact gap between the valve inner diameter 234 and the pressure outer diameter 101 is blocked.

At this time, the sealing ring 260 is leaked into the gap between the compressed air leaked into the coupling gap between the upper tube 210 and the lower tube 280 and the guide outer diameter 233 and the guide inner diameter 216 of the upper tube 210. It also blocks compressed air.

However, in the case of a conventional air coupler, a sealing ring groove is installed in a portion in which the valve outer diameter 238 of the present invention is formed, and a sealing ring for blocking compressed air is installed. The required sealing of the outer diameter of the valve and the inner diameter of the upper pipe was achieved through a separate sealing method, which resulted in a complicated structure.

5 shows a state in which the air tool connector 100 is connected to the air coupler body 200 to use the air tool 107, and the support outer diameter 103 is the air coupler body 200 and the air tool connector 100. It stabilizes the connection by limiting the play of). In order to maintain such a connection state and to continuously draw compressed air, the stop ball 240 is continuously bound in the inclined groove 102 and enters the inclined groove 102 without departing from the stop ball installation hole 212. Should be maintained. Maintaining the position of the stop ball 240 is the outer tube inner diameter (224).

The outer tube 220 receives the continuous elastic force of the elastic member 250 and tries to move toward the inlet step 214. As the stop ball 240 enters the inclined groove 102, there is no restraint on the outer tube 220. The outer tube 220 moves toward the inlet end 214 and the upper inner diameter jaw 221 is constrained to the inlet end 214 so that the outer tube inner diameter 224 is located in the stop ball installation hole 212 and the stop ball 240. ) Will be bound.

In the state in which the air tool 107 is connected to the air coupler main body 200, the elastic member 251 which is in contact with the lower groove 237 of the shutoff valve 230 is contracted, and thus, the elastic member 251 returns to its original shape. The pressure to move toward the upper pipe 210 is acting on the shutoff valve 230 by the restoring force to go.

This pressure is maintained while being transmitted to the stop ball 240 through the valve inner diameter jaw 232 and the inclined groove 102, the restraint of the outer tube inner diameter 224 is removed and at the same time the stop ball 240 is an installation hole. Moving from the 212 to the upper projection jaw 222, the restraining force of the stop ball 240 acting on the engagement slope 106 is removed so that the air tool 107 is separated from the air coupler body 200. Therefore, in order to separate the air tool 107, the outer tube 220 is pushed out by applying a force toward the lower tube 280.

When the air tool connector 100 is disconnected, the shutoff valve 230 must block compressed air, so that the shutoff valve 230 moves toward the upper pipe 210 by the restoring force of the elastic member 251, and thus the valve outer diameter 238. The sealing ring 260 is compressed and the sealing force is formed to block the flow of compressed air.

The end of the guide outer diameter 233 blocks the inside of the stop ball mounting hole 212. The stop ball 240 is positioned across the stop ball installation hole 212 of the upper tube 210 and the upper inner diameter jaw 221 of the outer tube 220 due to the interference of the guide outer diameter 233 and the outer tube 220. ) To restrain the outer tube 220 moving toward the inlet end 214 of the upper tube 210 by the elastic force of the elastic member 250. The state in which the outer tube 220 is restrained by the stop ball 240 continues until there is a reconnection of the air tool connector 100 while using the air tool 107 for the air coupler body 200. The inlet diameter 211 of the air tool connector 100 provides a convenience to make a quick connection with only one operation to plug in.

The assembly method of the air coupler equipped with a rotary spherical hose connector 300 according to the present invention is as follows.

The guide outer diameter 233 of the shutoff valve 230 provided with the sealing ring 261 is inserted into the guide inner diameter 216 of the upper tube 210 having the inlet end 214 fixed to a predetermined frame (not shown). After inserting the stop ball 240 into the stop ball installation hole 212 of the upper pipe 230 is coupled to the shut-off valve 230 to prevent the departure of the stop ball 240 to the outer tube 220 and the elastic member The 250 is installed inside the outer tube body 220. The fastening ring 270 is installed in the fastening ring groove 215 of the upper pipe body 210, and the elastic member 251 is aligned with the lower groove 237 of the shutoff valve 230 to install the sealing ring 260. Applying an axial force from the support end 285 of the tubular body 280 toward the upper tubular body 280, the fastening ring 270 installed on the upper tubular body 210 is caught by the fastening ring groove 282 of the lower tubular body 280. do. After the assembly of the air coupler main body 200 is completed, the sealing ring 262 is installed on the engaging projection 286 of the lower tube 280, and the rotating hole 310 of the rotary spherical hose connector 300 is inserted into the insertion hole 288. do. In addition, the fastening ring 271 is installed in the fastening ring groove 287 so that the rotary spherical hose connector 300 is not separated. In order to firmly secure the upper tube 210 and the lower tube 280, a lower end 280 has a support end 285 formed thereon such that the inlet end 214 and the stopper ball mounting hole 212 of the upper tube 210 are formed. It wraps most of it except.

<Example 2>

8 to 9 and 10, the hose twist prevention air coupler according to the present embodiment, the structure of the swivel joint type hose connector 400 is different from the first embodiment and the other configuration is the same as the first embodiment Therefore, only the swivel joint type hose connector 400 which is a novel configuration according to the present embodiment will be described in detail, and the rest of the configuration will be described with the same reference numeral as in the first embodiment.

8 is a cutaway perspective view of an air coupler equipped with a swivel joint type hose connector 400 according to the present invention, and FIG. 9 is a partially exploded perspective view of FIG. 8.

The insertion hole 288 of the lower tube 280 is equipped with a fixed outer diameter 425 of the rod 420 constituting one end of the swivel joint type hose connector 400 to be integral with the air coupler body 200, the rod insertion hole ( 412 shows a state in which the fixed hose connector 290 is mounted.

The swivel joint type hose connector 400 is a rotary body 410 and one rod 420 to form a pair, the two pairs are combined at right angles to form a rotating body that can rotate 360 ° horizontally and 360 ° vertically Wider rotation is possible than the rotary spherical hose connector 300, and two rotating bodies 410 and two rods 420 are formed in the same structure and dimensions to improve assembly. One set of fixed outer diameter 425 is mounted to the other of the rod inserting hole 412 by the locking of the fastening ring 271 to form a combined rotating body and another fixed outer diameter 420 is inserted into the lower tube 280 It is mounted to the 288 is characterized in that it is integrated with the air coupler body 200.

The set of rotating bodies includes one third sealing ring 262, two fourth sealing rings 430, and one second fastening ring 271.

The rod 420 of the swivel joint type hose connector 400 has a circumferential ring formed between a rotation ring 426 connected to the fixed outer diameter 425 and connected to the fixed outer diameter 425 with a sealing ring installation surface 427 formed at one end thereof. Direction of the ring ring groove 422 is characterized in that when the fastening ring 271 is contracted completely accommodated from the inner diameter to the outer diameter, the diameter of the larger than the rotation outer diameter 426 in connection with the rotation outer diameter 426 of the rod 420 A rod end 428 is formed to prevent separation of the rotating body 410, and the rotating body 410 is formed on the outer diameter 426 formed between the fastening ring groove 422 of the rod 420 and the rod end 428. A passage groove 401 is formed to connect the compressed air passage of the rod 420, and the passage groove 401 has a radial direction in which one end formed in a cylindrical shape on the central axis of the rod 420 is connected to the compressed air passage. A plurality of compressed air passage 424 is provided, between the fastening ring groove 422 and the passage groove 401 and the passage groove 401 and Sealing ring grooves 421 are formed between the rod ends 428 (see FIG. 9).

Rotating body 410 of the swivel joint type hose connector 400 is formed by rotating the inner diameter 411 that is rotated while being in surface contact with the rotation outer diameter 426 of the rod 420, the rotation body 410 is rotated The rod insertion hole 412 connected perpendicularly to the central axis of the inner diameter 411 is formed in a cylindrical shape. Between the rotation inner diameter 411 and the rod insertion hole 412 is formed a locking protrusion of the same shape as the end in the insertion hole 288 of the lower tube 280. In the rod insertion hole 412, a fastening ring groove 413 facing the fastening ring groove 422 of the rod 420 is formed in the circumferential direction, so that only the fastening ring 271 is accommodated halfway from the outer diameter to the center diameter and from the center diameter to the inner diameter. It is characterized by protruding half. The sealing ring 430 is installed in the sealing ring groove 421 to block the compressed air leaking into the gap between the rotating body 410 and the rod 420.

Since the rod insertion hole 412 is formed in the same structure as the insertion hole 288 of the lower pipe 280, all the hose connectors mounted on the insertion hole 288 of the lower pipe 280 can be used in common without additional processing. to be.

FIG. 10 shows an example of such a modification, and illustrates a cut-out attempt in a state where the rotatable air hose connector 300 is mounted at the rod insertion hole 412 of the swivel joint type hose connector 400. All such modifications are within the scope of the present invention and it should be understood that such modifications can be readily implemented by those skilled in the art.

10 may be used to rotate the air hose more broadly and smoothly than in the state shown in FIG. 8. In this case, since the basic operation principle is the same as that of FIG. 8, description thereof will be omitted to avoid duplication of description.

The present invention may be variously modified and may take various forms, and only the specific embodiments thereof are described in the detailed description of the invention. It is to be understood, however, that the present invention is not limited to the specific forms mentioned in the detailed description of the invention, but rather includes all modifications, equivalents, and substitutes within the spirit and scope of the invention as defined by the appended claims. It should be understood to include.

Hose anti-twist air coupler according to the present invention is widely used in the industrial field using compressed air, the industrial applicability is very high.

1 is a cross-sectional view of an air coupler according to the prior art.

Figure 2 is a coupled state of the air coupler assembly according to another prior art.

Figure 3 is an exploded perspective view of the air coupler is equipped with a rotary spherical hose connector according to the present invention.

4 is a cross-sectional view before connecting the air tool connector to the air coupler of FIG.

5 is a perspective view of the incision after the air tool connector is connected to the air coupler of FIG.

6 is a cross-sectional view of the air tool connector used in the air coupler of FIG.

7 is a cutaway perspective view of an air coupler equipped with a fixed hose connector according to the present invention.

8 is a cutaway perspective view of the air tool connector and the fixed hose connector is mounted on the air coupler is equipped with a swivel joint type hose connector according to the present invention.

9 is a partially exploded perspective view of an air coupler equipped with a swivel joint type hose connector according to the present invention.

10 is a cutaway perspective view of the air tool connector and the rotary hose connector is connected to the air coupler is equipped with a swivel joint type hose connector according to the present invention.

Description of the Related Art

100: air tool connector 101: pressure outer diameter

102: inclined groove 103: support outer diameter

104: Pressure outer diameter end

105,236,294,340,401,423,424: compressed air passage

106: binding slope 107: air tool

200: air coupler body 210: upper pipe

211: Inner bore 212: Stopper ball mounting hole

213: installation hole projection 214: entrance step

215,282,287,291,413,422: Fastening ring groove

216: guide inner diameter 217: crimp end

220: outer tube 221: upper inner diameter jaw

222: upper projection jaw 223: lower inner jaw

224: Outer tube inner diameter 230: Shut-off valve

231: inclined surface 232: valve inner diameter jaw

233: guide outer diameter 234: valve inner diameter

235,421: Sealing ring groove 237: Lower groove

238: valve outer diameter 240: stop ball

250,251: elastic member 260,261,262,430: sealing ring

270,271: fastening ring 280: lower tube

281: fastening ring disassembly hole 283: valve support jaw

284: inner diameter 285: support end

286: engaging projection 288: insertion hole

289: outside diameter of support end 290: fixed hose connector

292: sealing ring mounting surface 293: hose connecting body

295: fixed outer diameter 300: rotary ball type air hose connector

310: rotating hole 320: hose connecting body

400: swivel joint type hose connector 410: rotating body

411: rotation inner diameter 412: rod insertion opening

420: rod 425: fixed outer diameter

426: outer diameter of rotation 427: sealing ring mounting surface

428: end of rod

Claims (5)

An upper tube 210 having an inlet for connecting with an air tool connector; A lower tube 280 serving as a compressed air passage coupled to the upper tube 280; A shut-off valve 230 which is operated inside the upper pipe 210 and the lower pipe 280 and controls the flow of compressed air; In the air coupler is composed of an outer tube 220 which operates outside the upper body 210 and the lower body 280 is fastened and the operator can operate arbitrarily for separation of the air tool connector, which constitutes the air coupler body Insertion of the lower tube 280 is an air coupler, characterized in that the fixed hose connector or the rotary spherical hose connector to prevent the hose twist and the swivel joint type hose connector can be selectively mounted. The lower pipe 280 constituting the air coupler main body is connected to a cylindrical insertion hole which simultaneously serves as a rotation space and a fixed space of the hose connector, and serves as a compressed air passage and installs the elastic member 251. Between the inner diameter to provide a space at the same time is formed a locking projection which serves as a base of the elastic member 251 and the sealing ring 262, the sealing ring for blocking the leakage of compressed air by the fastening gap with the upper tube 210 ( At the end of the inner diameter 260 is installed, the support end of the structure surrounding the upper tube 210 is protruded to maintain a firm fastening of the upper tube 210 and the lower tube 280, the protruding end of the support end is an outer tube ( A support end outer diameter jaw for installing the elastic member 250 is formed on the outer diameter side of the support end to control the separation of the 220, and firmly secures the upper tube 210 and the lower tube 280 and is formed for easy assembly. Inside diameter of support Fastening ring groove 282 that accommodates only half of the cut ring of elastic material, 270 of the outer tube to the center diameter and protrudes half from the center diameter to the inner diameter, facing the fastening ring groove 215 of the upper tube 210. ) Is formed in the circumferential direction to the fastening ring 270 formed between the fastening ring groove 215 of the upper pipe body 210 by applying an axial force toward the fastening ring 270 installed on the upper pipe body 210. ) Is fastened by locking, and a plurality of fastening ring disassembly holes for disassembling the upper pipe 210 and the lower pipe 280 fastened by the fastening ring 270 are formed while passing through the fastening ring groove 282 in the radial direction. The insertion hole 288 is formed in the circumferential direction of the fastening ring groove 287 for receiving a part of the elastic ring of the cut part 271 is only received from the outer diameter to the center diameter and projecting half of the center diameter to the inner diameter. Air coupler characterized by the above. According to claim 2, wherein the upper ring 210 and the lower pipe 280 is installed in the space formed while the fastening is sealed ring to block the leakage of compressed air to the fastening gap is compressed with the shut-off valve 230 is compressed Blocking the flow of air, and in the open state of the shutoff valve 230 is compressed with the guide outer diameter of the shutoff valve 230 is characterized in that the compressed air leaking into the gap between the upper tube 210 and the shutoff valve, characterized in that Air coupler. delete The hose connector to prevent the hose twisting is a rotating body 410 is formed with a rod insertion hole connected to the inner diameter of the penetrating rotation and the sealing ring installation surface is formed at one end to the fixed outer diameter and connected to the fixed outer diameter A circumferential fastening ring groove 422 is formed between the rotational outer diameters, and a rod end having a diameter larger than the rotational outer diameter is formed to prevent separation of the rotation body 410 and a passage groove for smooth flow of compressed air in the rotational outer diameter. A plurality of radially compressed air passages are formed in the passage grooves and connected to the compressed air passages, one end of which is formed in an axial cylindrical shape, connected between the fastening ring grooves and the passage grooves, and between the passage grooves and the rod ends, respectively. The rod 420 in which the ring groove 421 is formed is formed into a pair, and the rotating body 410 constitutes a rotating body rotating in surface contact at the outer diameter of the rod 420. Is rotated 360 ° horizontally and 360 ° rotated vertically as a combination of the right angle is to be configured to enable a wider rotation than the rotary spherical hose connector, the same structure as the insertion hole of the lower tube 280 Fastening ring groove 413 opposite to the fastening ring groove 422 of the rod 420 is formed in the rod insertion hole which is formed to be used in common for all hose connectors that are mounted to the insertion hole of the lower tube 280 without additional processing in the circumferential direction. It is formed and constrained by a fastening ring made of an elastic material in which a hose connector part is partially cut in the rod insertion hole, and one set of the rotating bodies includes a rotating body in which the rod 420 is fastened by the fastening ring to the rod insertion hole of the other rotating body. The two rotating bodies 410 and the two rods 420 are swivel joint type hose connectors, which are formed in the same structure and dimensions and have improved assembly. Plug.

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