KR101681787B1 - Pipe joint - Google Patents

Abstract

[PROBLEMS] When a force in a pulling-out direction is applied after connecting a connecting pipe, the connecting pipe can be securely and firmly engaged, and the insertion resistance by the teeth or projections of the locking ring at the time of inserting the connecting pipe It is an object of the present invention to provide a small one-touch type pipe joint.
[MEANS FOR SOLVING PROBLEMS] In a connecting pipe accommodating portion of a pipe joint, a first protruding portion that functions to press the main surface of the connecting pipe when inserting the connecting pipe, and a second protruding portion that functions to stop the connecting pipe when the connecting pipe is withdrawn And a lock ring. Then, when the connection pipe is inserted and then moved in the pull-out direction, the first projection part is engaged with the connection pipe, and the second projection part is displaced so as to come into contact with the main surface of the connection pipe by interaction with the peripheral tapered wall Provides a one-touch pipe joint.

Description

Pipe joint {PIPE JOINT}

The present invention relates to a pipe joint for connecting a connection pipe by a one-touch operation. Particularly, in a connection pipe accommodating portion of a pipe joint, when a connection pipe is inserted, And a lock ring having a protruding portion and a second protruding portion functioning to stop the connecting pipe when the connecting tube is pulled out. Then, when the connection pipe is inserted and then moved in the pull-out direction, the first projection part is engaged with the connection pipe, and the second projection part is displaced so as to come into contact with the main surface of the connection pipe by interaction with the peripheral tapered wall And a pipe joint.

BACKGROUND ART Conventionally, a pipe joint for connecting a connecting pipe by one-touch has been known. For example, Japanese Unexamined Patent Application Publication No. 4-18793 (Patent Document 1), Japanese Unexamined Patent Publication No. 2001-193883 (Patent Document 2), Japanese Unexamined Patent Application Publication No. 2003-227592 (Patent Document 3) A cylindrical lock having protrusions such as teeth or protrusions for stopping the connection pipe between an inner cylinder arranged in a concentric manner and an outer cylinder having a tapered surface which is reduced in diameter toward the insertion port, A pipe joint of one-touch type is disclosed in which a ring is built so as to be movable in the axial direction. In this type of pipe joint, the connecting pipe is inserted to the deepest portion and then returned to move the lock ring near the insertion port. The projecting portion of the lock ring is reduced in diameter so as to enter the outer circumferential surface of the connecting pipe by interaction with the tapered surface formed in the vicinity of the insertion port of the outer cylinder, thereby preventing the connection pipe from being dislodged.

Further, this type of pipe joint needs to prevent the detachment of the connection pipe due to the movement of the lock ring into the insertion port for some reason after the insertion of the connection pipe and the release of the penetration of the teeth or protrusions. Therefore, normally, there is a feature that an elastic body such as a spring for urging the lock ring toward the insertion port is always disposed at the rear of the lock ring.

Japanese Unexamined Patent Application Publication No. 2005-172218 (Patent Document 4) has a structure substantially the same as that of the pipe joint described in the above Patent Documents 1 to 3. However, the inner pipe for supporting the connection pipe inserted in the pipe joint from the inside, There is disclosed a one-touch-type pipe joint of a type not provided.

WO2006 / 135227 (Patent Document 5) discloses a modification of the pipe joint described in Patent Documents 1 to 3 above. In the one-touch pipe joint disclosed in Patent Document 5, both the outer sleeve and the inner sleeve have tapered surfaces in the direction in which the gap of the insertion port is narrowed, and between them, A cylindrical lock ring including an outer grip ring and an inner grip ring disposed thereon, and a bottom portion connecting the both grip rings at the deepest portion, is disposed movably in the axial direction.

Therefore, also in the case of the pipe joint described in Patent Document 5, the connection pipe can be fixed by moving the lock ring near the insertion port by inserting the connection pipe to the deepest portion of the gap between the outer and inner cylinders, By interfering with the tapered surface formed in the vicinity of the insertion port of the outer cylinder and the inner cylinder, the teeth of the lock ring are inserted into the inner and outer circumferential surfaces of the connecting tube so as to prevent disconnection of the connecting tube.

Also in this type of pipe joint, since it is necessary to prevent the connection pipe from coming off due to the movement of the lock ring into the insertion port, the lock ring is always directed toward the insertion port And a spring lip for biasing is integrally formed.

However, the one-touch type pipe joint of the type using the interaction between the axially movable cylindrical lock ring and the tapered surface of the joint body described in Patent Documents 1 to 5 has the following problems.

That is, in the one-touch type pipe joint of the type having the movable locking ring, in order to prevent the connection pipe from being dislodged due to the movement of the lock ring after the connection pipe is inserted, the lock ring is always urged toward the insertion port by a spring or the like It must not be. Thus, in the free state before the connection pipe is inserted, the end portion of the lock ring enters the tapered surface provided on the outer cylinder or the inner cylinder, and is diametrically or diametrically reduced to narrow the gap of the connection pipe insertion port. Therefore, the insertion resistance by the teeth or projections of the lock ring when inserting the connection pipe is large, and the outer circumferential surface or the inner circumferential surface of the connection pipe after insertion is also deeply damaged. Therefore, the sealing effect by the sealing, There is a problem in that the force of the motor can not be sufficiently obtained.

In order to solve the problem of the one-touch type pipe joint having the above-mentioned movable type lock ring, the applicant has proposed a method of manufacturing a pipe joint as shown in Japanese Patent Application Laid-Open No. 2010-230094 (Patent Document 6) A lock ring is provided in the housing and is deformed so as to be extended in the axial direction when it is pressed in the radial direction, and when the connector tube is inserted, by the interaction with the peripheral tapered wall, And the free end of the connecting tube is displaced so as to press the main surface of the connecting tube. However, even in the one-touch type pipe joint having the curved lock ring, there is a problem that the insertion resistance caused by the protrusion of the lock ring when inserting the connecting pipe can not be made sufficiently small.

Further, as one-touch type pipe joints other than those having a lock ring movable in the axial direction in the pipe joint, JP-A-9-236190, JP-A-2006-118704 Patent Document 8), and Japanese Patent Laid-Open Publication No. 2008-164074 (Patent Document 9), there is known a one-touch pipe joint. The one-touch type pipe joint described in Patent Documents 7 to 9 is composed of an outer cylindrical member arranged concentrically and an inner cylindrical member extending from the joint body to form a receiving portion for receiving the connecting pipe, An annular lock ring having a plurality of radially extending teeth or protrusions is fixed to prevent the connection pipe from falling out by allowing it to enter the inner circumferential surface of the connecting pipe.

In addition, although it has basically the same structure as the tube joint described in Patent Document 7 and Patent Document 8, Japanese Patent Application Laid-Open No. 2002-106772 (Patent Document 10), Japanese Patent Application Laid-Open No. 2003-307290 (Patent Document 11) , A ring-shaped lock ring having a plurality of teeth or protrusions is fixed not to the outer circumferential surface of the inner cylinder but to the outer circumferential surface of the connecting tube from the inner circumferential surface of the outer cylinder, Is also known.

However, in the case of a one-touch type pipe joint in which an annular lock ring is fixed to the inside as described in Patent Documents 7 to 11, it is preferable that the teeth or projections of the lock ring It is necessary to arrange the teeth or projections so as to protrude largely from the surface of the inner cylinder or the outer cylinder. Therefore, in a pipe joint of a type having a lock ring of a fixed type, in general, the resistance at the time of inserting the connecting pipe, and the damage to the inner or outer peripheral surface thereof, Lt; RTI ID = 0.0 > a < / RTI > As a result, in a pipe joint of a type having a lock ring of a fixed type, a sufficient seal effect due to the sealing can not be obtained, and in order to solve this problem, the seal ring must be attached to the rear of the annular lock ring There were many design constraints.

Japanese Unexamined Utility Model Publication No. 4-18793 Japanese Patent Laid-Open No. 2001-193883 Japanese Unexamined Patent Publication No. 2003-227592 Japanese Patent Application Laid-Open No. 2005-172218 WO2006 / 135227 Japanese Patent Application Laid-Open No. 2010-230094 Japanese Patent Application Laid-Open No. 9-236190 Japanese Patent Application Laid-Open No. 2006-118704 Japanese Patent Application Laid-Open No. 2008-164074 Japanese Patent Application Laid-Open No. 2002-106772 Japanese Unexamined Patent Publication No. 2003-307290

Therefore, according to the present invention, it is possible to securely and securely fasten the connecting pipe when a force in the pulling-out direction is applied after connecting the connecting pipe, and at the same time, The present invention aims at providing a pipe joint with a simple structure and high reliability with a small insertion resistance and hardly damaging the outer circumferential surface or inner circumferential surface of the connection pipe after insertion.

Therefore, the inventors of the present invention have repeatedly studied the one-touch type pipe joint having the cylindrical lock ring using the interaction with the tapered surface of the joint body. As a result, the inventors of the present invention have found that, in one cylindrical lock ring, the protruding portion is provided with a first protruding portion functioning to follow the movement of the connecting ring after the connecting tube is inserted, And the second projecting portion functioning to strongly stop the connection pipe when the force acts in the pulling-out direction. Thus, the present invention has been accomplished.

That is, according to the present invention, there is provided an internal combustion engine comprising: an inner cylinder extending from an outer circumferential surface of a joint wall and having a tapered wall continuously extending in the axial direction toward the outer side in the radial direction; An outer cylinder disposed outside the inner cylinder and defining a receiving portion for receiving the connecting tube between the outer cylinder and the inner cylinder and a cylindrical body having a plurality of slits for forming a free end of a cantilever A first outward protruding portion that presses the inner circumferential surface of the connecting tube by elastic deformation of the tubular body when the connecting tube is inserted and a second outward protruding portion that is disposed at the free end, And a second outwardly protruding portion which is adapted to be engaged with the tapered wall and which is axially movably disposed between the fixed wall and the tapered wall of the inner cylinder, Wherein the inner lock ring is engaged with the inner circumferential surface of the connecting pipe when the connecting pipe is moved to the predetermined position of the receiving portion and then moved in the pulling-out direction, The inner lock ring moves in a withdrawal direction with the connecting tube and the free end of the inner lock ring enters a tapered wall region of the inner cylinder and by interaction with the tapered wall, And the protruding portion is pressed to come into contact with the inner circumferential surface of the connecting pipe.

In addition, according to the present invention, there is provided an elastic body comprising a joint body, an inner cylinder extending axially outward from the joint body, a fixed wall parallel to the axial direction, and a tapered wall continuously shrinking toward the outer side in the axial direction, An outer cylinder disposed outside the inner cylinder and defining a receiving portion for receiving the connecting tube between the outer cylinder and the inner cylinder; and a plurality of slits for forming the free end of the cantilever, A first inward protrusion which pressurizes the outer circumferential surface of the connecting tube by elastic deformation of the tubular body when the connecting tube is inserted; and a second inward protruding portion which is disposed at the free end and which, when the connecting tube is pulled out, And an outer lock ring having an inwardly projecting portion and arranged axially movably between the fixed wall and the tapered wall of the outer cylinder Wherein when the connecting pipe is inserted to a predetermined position of the accommodating portion and then moved in the pulling-out direction, the outer locking ring is engaged with the connecting pipe by the first inwardly projecting portion being engaged with the outer peripheral surface of the connecting pipe, And the outer lock ring is moved in the direction of withdrawing, and the free end of the outer lock ring enters the tapered wall region of the outer cylinder, and by interaction with the tapered wall, And the diameter of the tube is reduced so as to come into pressure contact with the outer peripheral surface of the tube.

According to the present invention, there is also provided a joint body comprising a joint body, a fixing wall parallel to the diameter direction, and an inner cylinder extending from the joint body toward the outer side in the axial direction and having a tapered wall continuously tapered toward the axially outer side, , A fixing wall parallel to the diameter direction, and a tapered wall continuously shrinking toward the outer side in the axial direction on the inner circumferential surface, and arranged outside the inner cylinder to receive the connection tube between the inner cylinder and the inner cylinder, And a plurality of slits for forming a free end of the cantilever beam, wherein when the connection tube is inserted, a first outward projection portion for pressing the inner circumferential surface of the connection tube by elastic deformation of the cylindrical body, And a second outward protruding portion disposed on the free end and stopping the connecting tube when the connecting tube is pulled out, An inner lock ring movably disposed in an axial direction between the fixed wall of the inner cylinder and the tapered wall and a plurality of slits for forming a free end of the cantilever, A first inward projection portion that presses the outer circumferential surface of the connection tube by elastic deformation of the tubular body and a second inward projection portion that is disposed at the free end and that stops the connection tube when the connection tube is pulled out, And an outer lock ring movably disposed in an axial direction between the fixing wall and the tapered wall of the outer cylinder, wherein when the connection pipe is inserted to a predetermined position of the accommodating portion and then moved in the withdrawing direction , The inner lock ring is moved in the withdrawing direction together with the connection tube by the first outward projection protruding from the inner circumferential surface of the connection tube And the inner lock ring enters the tapered wall region of the inner cylinder and by interaction with the tapered wall, the inner lock ring presses the second outward projection to the inner circumferential surface of the connecting tube And the outer lock ring is moved in the withdrawing direction together with the connection pipe by the first inward projection protruding from the outer circumferential surface of the connection tube, and the free end of the outer lock ring is tapered And the outer locking ring is reduced in size to come into pressure contact with the outer peripheral surface of the connecting tube by the second locking ring by interaction with the tapered wall.

According to the present invention, the joint body, the inner cylinder and the outer cylinder all have a cylindrical shape, and the joint body among them may be formed integrally with the inner cylinder including the inner cylinder. Further, the joint body and the inner cylinder have a passage opening for flowing a fluid therein, and the tip end thereof is preferably in the form of a funnel for reducing the resistance of the fluid. Furthermore, in the case where the productivity and the cost of the pipe joint are emphasized, the joint body, the inner cylinder, and the outer cylinder can be integrally formed with all the parts.

In the case of a type in which the outer tube of the pipe joint is separated from the joint body, the outer tube may be forcedly fitted (tightly fitted) to the joint body in a non-rotatable manner or loosely fitted (loosely fitted) It is possible. In the case where the outer tube is rotatably attached to the joint body, since this type of tube joint can easily avoid the bending stress and the rotation moment which the connecting tube receives during or after the connection, .

It is also preferable that the distal end of the outer cylinder protrude to the outer side from the distal end of the inner cylinder in the axial direction. The reason for this is that it is advantageous to protect the inner cylinder from an external impact due to a fall or the like, and to allow the outer cylinder to remain in the range of the damage and to facilitate the exchange.

In the present invention, the material of the joint body, the inner cylinder and / or the outer cylinder is not particularly limited as long as it is relatively hard, but it is preferable that the material is formed of a plastic material or a metal material. Particularly, when molding with a plastic material, it is more preferable to use a polyphenyl sulfone (PPSU) resin or a polyphenylene sulfide (PPS) resin as a material.

According to the present invention, the seam main body and the outer tubular body including the inner cylinder are disposed concentrically, and a receiving portion for receiving the connecting tube is formed between the inner tubular body and the outer tubular body. In the accommodating portion of the pipe joint, a lock ring having a first protrusion functioning to press the main surface thereof when the connection tube is inserted and a second protrusion functioning to stop the connection tube at the time of withdrawing the connection tube, As shown in Fig. The lock ring may be mounted on either the outer circumferential surface of the inner cylinder or the inner circumferential surface of the outer cylinder. However, when one of the lock rings is broken due to dropping of the pipe joint, attachment of solvent, It is preferable to arrange the lock rings on both sides so as to securely grasp it.

In order to arrange the inner lock ring movably in the outer circumferential surface of the inner cylinder, a tapered wall is formed which is continuously diametrically directed toward the outer side in the axial direction and parallel to the radial direction. In order to dispose the outer lock ring movably in the axial direction, the inner peripheral surface of the outer cylinder is formed with a fixed wall parallel to the radial direction and a tapered wall which is continuously reduced in diameter toward the outer side in the axial direction. And, since the inner lock ring and / or the outer lock ring are disposed between the fixed wall and the tapered wall, one end (fixed end) of the inner lock ring and / or the outer lock ring can be fixed to the outer peripheral surface of the inner cylinder and / Or the inner wall of the outer cylinder, and the other end (free end) is allowed to move in the axial direction due to the relationship with the tapered wall. Therefore, the fixed end of the inner lock ring and / or the outer lock ring is disposed inward of the free end in the axial direction, and the free end is provided with a second projection for stopping the connection pipe when pulled out.

The inner lock ring disposed on the outer peripheral surface of the inner cylinder is formed of a cylindrical body and a plurality of slits are cut from the end of the cylindrical body so as to form a free end of the cantilever. The inner lock ring further includes a first outward protrusion functioning to press the inner circumferential surface of the connecting pipe by elastic deformation when the connecting pipe is inserted and a second outward protruding portion functioning to stop the connecting pipe when the connecting pipe is pulled out, And a second outward protruding portion disposed in the second protruding portion.

The pressing function of the first outward projecting portion can be achieved by using an elastic body such as rubber in a portion for supporting the protrusion of the inner lock ring or by making the inner lock ring itself elastically deformed to support the protrusion . Particularly, in the latter case, since a plurality of slits are provided in the body portion of the inner lock ring, it is effective to bend the body portion in the radially outward direction.

That is, the bulging portion of the inner lock ring has a shape such as a measuring worm (looper) in its axial direction, and therefore is bent when pressed toward the radially inward direction, and is inserted with its reaction force, The inner circumferential surface of the connecting pipe is suitably pressed. Further, since the slit extends in the axial direction so as to penetrate through the body portion of the inner lock ring, each of the bulge portions divided by the slit facilitates elastic deformation without interfering with each other. In addition, the first outward projecting portion is also disposed axially inwardly of the second outward projecting portion.

As a result, when the connecting pipe is inserted to the predetermined position of the receiving portion of the pipe joint and then moved in the pulling-out direction, the first outwardly projecting portion is engaged with the inner circumferential surface of the connecting pipe, Move. Then, the free end of the inner lock ring enters the tapered wall region of the inner cylinder, and by the interaction with the tapered wall, the inner lock ring is enlarged to press the second outward projection to the inner circumferential surface of the connecting tube.

As described above, in the pipe joint of the present invention, the first outward projecting portion is supported by the body of the inner lock ring so as to appropriately press the inner circumferential surface of the inserted connection pipe, and the second outward projecting portion is inserted in the withdrawing direction It is retracted so as not to come into contact with the inner circumferential surface thereof and is supported by the free end of the inner lock ring. According to the present invention, when inserting the connecting pipe, the insertion resistance received by the connecting pipe from the first outward protruding portion is small, but when the connecting pipe moves in the pullout direction, the connecting pipe is in contact with the second outward- It is stuck securely and firmly by interaction.

Further, in the pipe joint of the present invention, since the inner lock ring also moves in the pull-out direction together with the connection pipe by the engagement action of the first outward projection, when the connecting pipe after the insertion moves in the pull-out direction, It is not necessary to provide a spring or the like for always urging the lock ring toward the insertion port.

On the other hand, the outer lock ring disposed on the inner peripheral surface of the outer cylinder is formed of a cylindrical body, and a plurality of slits are cut from the end of the cylindrical body so as to form a free end of the cantilever. The outer lock ring is provided with a first inward protrusion functioning to press the outer circumferential surface of the connecting pipe by elastic deformation when the connecting pipe is inserted and a second inward protruding portion functioning to stop the connecting pipe at the time of withdrawing the connecting pipe, And a second inward protruding portion disposed in the second inward protruding portion.

The pressing function of the first inwardly projecting portion can be achieved by using an elastic body such as rubber for the portion for supporting the protrusion of the outer lock ring or by the structure in which the body of the outer lock ring itself supporting the protrusion is elastically deformed Can be achieved. Particularly in the latter case, since the body portion of the outer lock ring is provided with a plurality of slits, it is effective that the body portion is curved so as to be constricted (concave) toward the radially inward side.

That is, since the constricted portion (concave portion) of the outer lock ring has a cross-sectional shape in the axial direction of the same shape as the looper, it is bent when pressed in the radially outward direction, Press the outer circumferential surface properly. Further, since the slit extends axially so as to penetrate the body of the outer lock ring, each of the constricted portions divided by the slit facilitates elastic deformation without interfering with each other. Further, the first inwardly projecting portion has a feature that it is disposed axially inwardly of the second inwardly projecting portion.

As a result, when the connection pipe is inserted to the predetermined position of the receiving portion of the pipe joint and then moved in the pull-out direction, the first inwardly projecting portion is engaged with the outer circumferential surface of the connecting pipe, Move. Then, the free end of the outer lock ring enters the tapered wall region of the outer cylinder, and the outer lock ring is diametrically reduced so as to press the second inward protruding portion to the outer circumferential surface of the connecting tube by interaction with the tapered wall.

As described above, in the pipe joint of the present invention, the first inwardly projecting portion is supported by the body of the outer lock ring so as to appropriately press the outer circumferential surface of the inserted connecting pipe, and the second inwardly projecting portion is inserted in the withdrawing direction So as to be substantially in contact with the outer circumferential surface thereof, and is supported by the free end of the outer lock ring. According to the present invention, when inserting the connecting pipe, the insertion resistance received by the connecting pipe from the first inwardly projecting portion is small, but when the connecting pipe moves in the pulling-out direction, the connecting pipe is connected to the second inward- And is stopped to be surely and firmly held by the action.

Further, in the pipe joint of the present invention, when the connection pipe after insertion is moved in the pull-out direction, the outer lock ring also moves in the pull-out direction together with the connection pipe by the engagement action of the first inward projection, It is not necessary to provide a spring or the like for always urging the lock ring toward the insertion port.

Further, according to the pipe joint of the present invention, when a pipe joint of the type having a conventional movable type lock ring or an annular lock ring is fixed to the inside of the pipe joint, The outer circumferential surface is hardly damaged by the projection of the lock ring. Therefore, the pipe joint of the present invention can obtain a high seal effect and a strong locking force of the connecting pipe by the synergistic effect with the sealing described later.

In the present invention, when both the inner lock ring and the outer lock ring are used in combination, the first outward projecting portion of the inner lock ring and the first inward projecting portion of the outer lock ring press the connecting pipe at different positions in the axial direction Or may be arranged so as to press the connecting pipe at positions opposite to each other. The second outwardly projecting portion of the inner lock ring and the second inwardly projecting portion of the outer lock ring may be arranged so as to hang the connecting pipe at different positions in the axial direction as in the first outward and inwardly projecting portions, Or may be arranged so as to hang the connecting pipe at the opposed positions.

When the first outwardly and inwardly protruding portions are disposed at different positions, it is advantageous to softly contact the protruding portions with the inner and outer peripheral surfaces of the connection pipe. When the first outwardly and inwardly protruding portions are disposed at mutually opposing positions, rickety Thereby making it possible to smoothly insert the optical fiber without any interference. When the first outwardly projecting portion is provided at the vertex of the bulging portion of the inner lock ring and the first inwardly projecting portion is provided at the vertex opposite to the constricted portion of the outer lock ring, the first outwardly projecting portion and the first inwardly projecting portion A sufficient moving distance can be obtained by the curved shape of the bulging portion and the constricted portion, and it is possible to provide the first outward and inwardly projecting portions having flexibility and small insertion resistance.

On the other hand, when the second outward and inwardly projecting portions are disposed at different positions, it is possible to dispose a seal member such as a sealing ring at a position facing the projecting portion. Further, in the case of disposing them at mutually opposed positions, it is possible to smoothly insert the connecting pipe without rattling.

The material of the lock ring capable of achieving the same functions as described above is not particularly limited as long as it is hard and has appropriate elasticity, but it can be formed of a plastic material or a metal material. Particularly, when molding with a plastic material, it is preferable to use an engineering plastic material such as polyphenylsulfone (PPSU) resin or polyphenylene sulfide (PPS) resin as a material.

It is preferable that the pipe joint according to the present invention is provided with at least one seal ring for sealing the gap between the outer circumferential surface of the inner cylinder and the inner circumferential surface of the outer cylinder. The sealing is generally fixed by forming a groove on the outer circumferential surface of the inner cylinder and / or the inner circumferential surface of the outer cylinder, and accommodating the groove. In addition, the cross-sectional shape is not particularly limited, and seals having various cross-sectional shapes such as O, square, concave, and lip shapes can be employed.

The sealing can be placed on the outer circumferential surface of the inner cylinder or on the inner circumferential surface of the outer cylinder or on both circumferential surfaces thereof. However, it is preferable to arrange at least one seal ring on the outer circumferential surface of the inner cylinder so as to exclude dust or dust from entering from the outside as much as possible, and to maintain the seal condition even when the outer cylinder is damaged for some reason. Such arrangement of the seals also helps to prevent corrosion of the metal parts exposed on the cross section when a circular pipe such as an aluminum three-layer pipe is connected by a pipe joint.

The sealing is not necessarily required to be one on the outer circumferential surface of the inner cylinder or the inner circumferential surface of the outer cylinder, but a plurality of seals may be arranged. However, it is preferable that at least one seal ring is disposed axially outwardly of the second projection portion in order to secure a high degree of sealing by contacting the main surface of the dust-free connection pipe.

Further, the seal is disposed at a position facing the second outwardly projecting portion or the second inwardly projecting portion as described above, so that the sealing can be made stronger by using the pressing force of the second outwardly projecting portion or the second inwardly projecting portion after the connection tube is inserted Seal effect can be obtained. Further, when the seal ring is disposed on the outer circumferential surface of the inner cylinder, it is advantageous for the seal ring to be located axially outwardly of the second outward protruding portion of the inner lock ring in order to avoid the damage, It is preferable that the protruding portion is disposed on the axially inner side of the second inwardly projecting portion of the outer lock ring.

When two or more seals are arranged on one side, and if importance is attached to the reduction in rattling of the connecting pipe after mounting, the seal ring is preferably provided so that the same lock ring is attached between at least two seals. It is preferable to arrange the lock ring in front of and behind the lock ring. In addition, when sealing is arranged on the outer side in the axial direction with respect to the second projection, this is advantageous for avoiding damage. In particular, in the case of emphasizing the sealability and the strengthening of the engagement of the connecting pipe, It may be disposed on the outer side of the ring. Further, in any of the above-mentioned cases, the seal ring disposed axially outwardly of the second projection part is provided with the second projection part of the lock ring attached to the cylinder on the opposite side of the seal ring, It is preferable to arrange them at opposite positions.

The outer casing of the pipe joint according to the present invention may have an insertion confirmation port (confirmation port) for confirming whether or not the connection pipe is inserted to a predetermined position of the accommodation portion. It is preferable that the insertion check hole is an opening penetrating the front and back surfaces of the outer cylinder and disposed axially inward of the outer lock ring. As a result, it is possible to easily confirm from the outside whether or not the leading end portion of the connecting pipe is inserted to a predetermined position of the pipe joint receiving portion.

Further, in order to further facilitate the insertion confirmation of the connecting pipe, it is preferable that the tapered surface is pushed up by the end portion of the connecting pipe when the connecting pipe is inserted as a rod-shaped part having a tapered surface at the tip end, It is also possible to set the insertion check means of the type that protrudes to the outside of the outer cylinder in the inserting hole of the outer cylinder. As another specific example, as a C-shaped or O-shaped ring component having a rod-like member for setting in an insertion hole, when the connection tube is inserted, the ring component is moved inward And the insertion checking means of the type in which the bar member is pulled in from the outside of the outer cylinder into the inside of the receiving portion of the pipe joint may be set.

Further, in the receiving portion of the pipe joint according to the present invention, the ring-shaped part is provided with a ring-shaped groove portion for receiving the tip end of the connecting pipe at one end face (side face) The end face (side face) of the insertion guide ring having chamfered or rounded edges can be disposed.

The insertion guide ring covers the leading end of the connecting pipe when the connecting pipe is inserted, and guides the connecting pipe from the axially outer side to the inner side in the receiving portion of the pipe joint. Therefore, even when the end portion of the connection pipe is sharply cut, the receiving portion of the pipe joint including the inner and outer lock rings, the seal ring, and the like is protected from being damaged by the sharp connecting pipe end portion. Therefore, it is preferable that the insertion guide ring is formed of a smooth material such as nylon resin.

According to the present invention, by separating the protruding portion into the first protruding portion functioning to follow the operation of the connecting pipe and the second protruding portion functioning to stop the connecting pipe, the connection pipe is connected to the protruding portion in the withdrawing direction It is possible to securely and securely fasten the connecting pipe when the force acts, and the insertion resistance by the teeth or projections of the lock ring at the time of inserting the connecting pipe is small, and the outer peripheral surface or the inner peripheral surface of the connecting pipe after insertion is damaged It is possible to provide a one-touch-type pipe joint having a simple structure and a high reliability, which is hardly made to be attached.

Further, according to the present invention, in the case of using a seal ring for sealing the gap between the connecting pipe and the outer circumferential face of the inner cylinder and / or the inner circumferential face of the outer cylinder, it is possible to use a second protrusion functioning to stop the connecting pipe The high cissing property which is not available in the prior art can be obtained.

1 is a perspective view showing a whole of a preferred embodiment of a one-touch pipe joint according to the present invention.
Fig. 2 is a cross-sectional view of the pipe joint of Fig. 1 taken along a cross section passing through the central axis; Fig.
Fig. 3 is a perspective view partially showing an inner cylinder of the pipe joint of Fig. 1;
Fig. 4 is a sectional view of the inner cylinder of Fig. 3 taken along a section passing through the central axis. Fig.
Fig. 5 is a perspective view showing an outer cylinder of the pipe joint of Fig. 1;
Fig. 6 is a cross-sectional view of the outer cylinder of Fig. 5 taken along a section passing through the central axis. Fig.
7 is a perspective view showing the inner lock ring of the pipe joint of Fig. 1;
Fig. 8 is a cross-sectional view of the inner lock ring of Fig. 7 taken along a section passing through the central axis. Fig.
Fig. 9 is a perspective view showing an outer lock ring of the pipe joint of Fig. 1;
10 is a cross-sectional view of the outer lock ring of Fig. 9 taken along a section passing through the central axis.
Fig. 11 is a partial cross-sectional view of a part of the pipe joint of Fig. 1 taken along a section passing through the central axis; Fig.
12 is a schematic view showing a method of using the pipe joint of Fig.

Hereinafter, a one-touch pipe joint according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments shown below, but various modifications can be made without departing from the technical idea of the present invention.

[Example]

1 shows a whole of a one-touch pipe joint 1 according to a preferred embodiment of the present invention. As will be understood with reference to Fig. 1, the pipe joint 1 of the present invention has two connecting pipe insertion sockets 2 in an I-shape. However, the pipe joint of the present invention is not limited to the type having two connection pipe insertion sockets 2, and the pipe joint of the present invention may be provided with, for example, only one connection pipe insertion socket 2 according to the present invention Type socket socket 2 in which a common water inlet or a differential socket is disposed on the other side and three or more connection pipe insertion sockets such as a T- And a pipe joint of a type in which the pipe 2 is disposed. The pipe joint of the present invention also includes a pipe joint in which a connection pipe insertion socket 2 for different pipe diameters is combined.

The pipe joint 1 is formed by a joint main body 3, an inner cylinder 4, an outer cylinder 5, an inner lock ring 6 and an outer lock ring 7 (see Fig. 2) Also has a substantially cylindrical shape. In this embodiment, the joint main body 3 includes the inner cylinder 4 and is integrally molded by injection molding (see Fig. 3). The joint body 3 and the inner cylinder 4 are each provided with a passage opening portion 30 for flowing a fluid therein. The distal end portion 31 has a funnel shape in order to reduce the resistance of the fluid. Furthermore, when the productivity and cost of the pipe joint 1 are emphasized, the joint main body 3, the inner cylinder 4 and the outer cylinder 5 are integrally molded by injection molding or the like It is possible.

The material of the joint body 3, the inner cylinder 4 and / or the outer cylinder 5 is not particularly limited as long as it is relatively hard, but it is preferable that the material is formed of a plastic material or a metal material. Particularly, when molding with a plastic material, it is preferable to use a polyphenyl sulfone (PPSU) resin or a polyphenylene sulfide (PPS) resin as a material.

2, a flange 41 is formed on the axially inner side of the inner cylinder 4, and an annular connecting groove 51 formed in the inner circumferential surface 50 of the outer cylinder 5 The outer cylinder 5 is fitted to the joint body 3 including the inner cylinder 4 so as to be concentrically slidable by loosely fitting (loosely fitting) the outer flange 42 of the flange 41 do. Between the inner cylinder (4) and the outer cylinder (5), a receiving portion (10) for receiving the connecting pipe is formed.

The tube joint 1 can be easily and easily connected to the joint body 3 and the inner cylinder 4 by means of the aforementioned method when the outer tube 5 is attached to the joint body 3 and the inner tube 4, It is possible to cope with the fracture stress relatively flexibly. In addition, the pipe joint 5 can be made to be a pipe joint having a high rigidity as a whole by forcibly fitting (tightly fitting) the pipe body 5 into the joint body 3 in a non-rotatable manner.

The distal end 52 of the outer cylinder 5 of this embodiment protrudes outward beyond the tip end 43 of the inner cylinder 4 in the axial direction. The reason for this is that it is advantageous to protect the inner cylinder 4 from an external impact due to a fall or the like, and to allow the outer cylinder 5 to stay in the range of the breakage in case of emergency and to facilitate the exchange. This structure reduces the stress applied to the tip end of the inner cylinder 4 when the connecting tube is displaced eccentrically with respect to the axial center of the pipe joint 1 for some reason, Thereby effectively preventing breakage of the battery.

The receiving portion 10 of the pipe joint 1 is provided with a first protruding portion that functions to press the inner and outer peripheral surfaces of the connecting pipe when inserting the connecting pipe and a second protruding portion that functions to stop the connecting pipe when the connecting pipe is pulled out. The inner lock ring 6 and the outer lock ring 7 are disposed movably in the axial direction. In this embodiment, the lock ring need not be mounted on both the outer circumferential surface 40 of the inner cylinder 4 and the inner circumferential surface 50 of the outer cylinder 5, but may be mounted on either side . However, in consideration of the fact that one of the lock rings may be broken due to the drop of the pipe joint 1, the attachment of the solvent, the depressing of the pipe joint, and the like, the lock ring is fixed to the inner cylinder 4 and the outer cylinder 5, As shown in Fig.

3 and 4, an inner lock ring 6 (see Figs. 7 and 8) is movably disposed in the outer peripheral surface 40 of the inner cylinder 4 of the pipe joint 1 A tapered wall 45 is formed which is continuously diametrically directed toward the axially outward side with the fixed wall 44 parallel to the radial direction. 7 and Fig. 8), the one end (fixed end 60) of the inner lock ring 6 (Fig. 7 and Fig. 8) is connected to the fixed wall 44 of the inner cylinder 4, And the other end (the free end 61) is allowed to move in the axial direction due to the relationship with the tapered wall 45, 45 (see Fig. 2). The fixed end 60 of the inner lock ring 6 is disposed axially inwardly of the free end 61 and the free end 61 is provided with a second outward The protruding portion 65 is disposed.

5 and 6, the outer lock ring 7 (see Figs. 9 and 10) is movable in the axial direction on the inner peripheral surface 50 of the outer cylinder 5 of the pipe joint 1 A tapered wall 55 which is continuously reduced in diameter toward the outer side in the axial direction is formed. A reinforcing rib (not shown) may be provided on the outer peripheral surface 53 of the outer cylinder 5 to resist bending stress transmitted from the connecting pipe. 9 and Fig. 10), the one end (fixed end 70) of the outer lock ring 7 (Fig. 9, Fig. 10) And between the fixed wall 54 and the tapered wall 55 such that the other end (free end 71) is allowed to move in the axial direction by the relationship with the tapered wall 55, (See Fig. 2). The fixed end 70 of the outer lock ring 7 is disposed axially inwardly of the free end 71 and the free end 71 is provided with a second inward The protruding portion 75 is disposed.

7 and 8 show a perspective view of an inner lock ring 6 used in the pipe joint 1 of the present embodiment and a cross-sectional view of a case where the inner lock ring 6 is cut through a cross section passing through the central axis.

The inner lock ring 6 disposed on the outer circumferential surface 40 of the inner cylinder 4 is formed of a cylindrical body and a plurality of slits 63 are formed in the trunk portion thereof so as to form a free end 61 of the cantilever. And is cut from the end of the tubular body. The inner lock ring 6 is provided with a first outward protrusion 64 functioning to press the inner circumferential surface of the connecting pipe by elastic deformation when the connecting pipe is inserted and a second outward protruding portion 64 functioning to stop the connecting pipe And a second outward protruding portion 65 disposed at the free end and functioning as a second protruding portion.

The pressing function of the first outward projection 64 is achieved by making the structure of the inner lock ring itself supporting the projection of the inner lock ring 6 elastically deformable. That is, since the bulging portion 62 of the inner lock ring 6 has a shape such as a measuring worm (looper) in its axial direction, it is bent when pressed toward the radially inward direction, The inner peripheral surface 80 of the connecting pipe 8 inserted with the reaction force is suitably pressed. Since the slit 63 extends axially so as to penetrate through the body portion of the inner lock ring 6, each of the bulge portions 62 divided by the slit 63 is elastically deformed without interfering with each other . The first outward projection 64 is also disposed axially inwardly of the second outward projection 65.

The first outward protruding portion 64 and the second outward protruding portion 65 of the inner lock ring 6 are capable of preventing the stopping of the connection pipe or the detachment of the connection pipe by pressing the surface of the connection pipe Shape, and it is usually composed of a single or multiple projections, sawtooth or hook projections. In the case of this embodiment, a gentle inclined surface is formed on the connection pipe insertion side and a substantially vertical surface is formed on the opposite side in consideration of the force of the engagement of the connection pipe or the damage to the connection pipe, the formability and durability of the protrusion, Like outwardly projecting portions 64, 65, which are formed in the shape of a mountain.

As a result, referring to Fig. 12, when the connecting pipe 8 is inserted to the predetermined position of the receiving portion 10 of the pipe joint 1 (c) and then moved in the pulling direction, The outwardly projecting portion 64 is engaged with the inner circumferential surface 80 of the connecting pipe 8 so that the inner lock ring 6 moves together with the connecting pipe 8 in the pulling-out direction. The free end 61 of the inner lock ring 6 enters the region of the tapered wall 45 of the inner cylinder 4 so that the inner lock ring 6 is locked by the tapered wall 45, 2 outward protruding portion 65 is pressed against the inner circumferential surface 80 of the connecting pipe 8 (see arrow c).

As described above, in the pipe joint 1 of the present embodiment, the first outward projection 64 is supported by the body of the inner lock ring 6 so as to appropriately press the inner circumferential surface 80 of the inserted connection pipe 8, The second outward projection 65 retreats so as not to come into contact with the inner circumferential surface 80 when the connecting tube 8 is inserted and does not move in the withdrawing direction so that the free end 61 of the inner lock ring 6, As shown in Fig. When the connection pipe 8 is inserted, the insertion resistance received by the connection pipe 8 from the first outward protrusion 64 is small. However, when the connection pipe 8 moves in the pull-out direction, The second outward projection 65 interlocks securely and firmly with the tapered wall 45 by the interaction.

In the pipe joint 1 of the present embodiment as well, the inner lock ring 6 is not necessarily engaged with the first outward projecting portion 64 by the engagement action of the first outward projecting portion 64 when the connecting pipe 8 after the insertion moves in the pull- It is not necessary to provide a spring or the like for urging the lock ring toward the insertion port at all times like a pipe joint having a conventional movable type lock ring.

9 and 10 show a perspective view of an outer lock ring 7 used in the pipe joint 1 of the present embodiment and a cross-sectional view of a case where the outer lock ring 7 is cut through a cross section passing through the central axis.

The outer lock ring 7 disposed on the inner circumferential surface 50 of the outer cylinder 5 is formed of a tubular body similar to the inner lock ring 6 described above and has a cantilevered free end 71 A plurality of slits 73 are cut from the end of the tubular body. The outer lock ring 7 is provided with a first inward projection 74 functioning to press the outer circumferential surface of the connecting tube by elastic deformation when the connecting tube is inserted and a second inward protruding portion 74 functioning to stop the connecting tube And a second inwardly projecting portion 75 disposed at the free end and functioning.

The pressing function of the first inward projection 74 is achieved by making the structure of the outer lock ring itself supporting the projection of the outer lock ring 7 elastically deformable. That is, the constricted portion (concave portion) 72 of the outer lock ring 7 has a shape similar to a measuring worm (looper) in its axial direction, so that when pressed in the radially outward direction And appropriately presses the outer circumferential surface 81 of the connecting pipe 8 inserted by the reaction force. Since the slit 73 extends in the axial direction so as to penetrate the body portion of the outer lock ring 7, the constricted portion 72 divided by the slit 73 does not interfere with each other, Lt; / RTI > The first inwardly projecting portion 74 is also disposed axially inwardly of the second inwardly projecting portion 75.

The first inward protruding portion 74 and the second inward protruding portion 75 of the outer lock ring 7 are formed in such a shape as to prevent the engagement with the connecting pipe or the detachment of the connecting pipe by pressing the surface of the connecting pipe It is usually composed of a single or a plurality of projections, sawtooth or hook projections. In the case of the present embodiment, a gentle slope is formed on the connection pipe insertion side and a substantially perpendicular surface is formed on the opposite side in consideration of the force of the engagement of the connection and the damage of the connection, the moldability and the durability of the protrusion Mountain-like inward projections 74 and 75 are employed.

As a result, referring to Fig. 12, when the connecting pipe 8 is inserted to the predetermined position of the receiving portion 10 of the pipe joint 1 (c) and then moved in the pulling direction, Since the inwardly projecting portion 74 is engaged with the outer peripheral surface 81 of the connecting pipe 8, the outer lock ring 7 also moves in the pulling-out direction together with the connecting pipe 8. [ The free end 71 of the outer lock ring 7 enters the region of the tapered wall 55 of the outer cylinder 5 and the outer lock ring 7 is engaged with the tapered wall 55, Two inward protruding portions 75 are pressed against the outer circumferential surface 81 of the connecting pipe 8 (see arrows c).

As described above, in the pipe joint 1 of the present embodiment, the first inwardly projecting portion 74 is supported by the body of the outer lock ring 7 so as to appropriately press the inner circumferential surface 80 of the inserted connecting pipe 8, The second inward projection 75 retreats so as not to come into contact with the outer circumferential surface 81 of the connecting tube 8 when the connecting tube 8 is not moved in the withdrawing direction and the free end 71 of the outer lock ring 7, As shown in Fig. When the connecting pipe 8 is inserted, the insertion resistance received by the connecting pipe 8 from the first inward protruding portion 74 is small. However, when the connecting pipe 8 moves in the pulling direction, The second inward projection 75 interlocks with the tapered wall 55 to securely and securely fasten the connecting tube 8.

In the pipe joint 1 of the present embodiment as well, when the connection pipe 8 after insertion is moved in the pull-out direction, the outer lock ring 7 is also engaged with the first inward protruding portion 74 by the engagement action of the first inward- It is not necessary to provide a spring or the like for urging the lock ring toward the insertion port at all times like a pipe joint having a conventional movable type lock ring.

On the other hand, in the case of detaching the connection pipe 8 connected by the pipe joint 1, if the outer tubular body 5 can be removed, the outer tubular body 5 is detached from the inner tubular body 4, It is possible to release the locking by the lock ring 7.

11, in the pipe joint 1 of the present embodiment, before the connecting pipe 8 is inserted, the inner lock ring 6 and the outer lock ring 7 are fixed to their free ends 61 And bulging portions 62 and a constricted portion 72 curved in a length so as not to enter the regions of the tapered walls 45 and 55. The second protruding portions 65 and 75 of the inner lock ring 6 and the outer lock ring 7 are inserted into the outer peripheral surface 40 of the inner cylinder 4 and the outer cylinder 5 In the radially inward and radially outward directions to a position that is inwardly inward of the inner circumferential surface 50 of the connecting pipe 8, that is, a position where it does not substantially contact the inner circumferential surface 80 or the outer circumferential surface 81 of the connecting pipe 8 to be inserted.

Therefore, according to the pipe joint 1 of the present embodiment, when a pipe joint of the type having a conventional movable type lock ring or a ring joint of an annular type is fixed inside, The inner circumferential surface 80 or the outer circumferential surface 81 of the tube 8 is hardly damaged by the protruding portion of the lock ring. For this reason, the pipe joint 1 of the present embodiment can obtain a high seal effect and a strong locking force of the connection pipe 8 by the synergistic effect with the seal described later.

The first outward projecting portion 64 of the inner lock ring 6 and the first inward projecting portion 74 of the outer lock ring 7 are connected at different positions in the axial direction in the pipe joint 1 of this embodiment So as to press the tube 8 (see Figs. 11 and 12 (b)). The second outward protruding portion 65 of the inner lock ring 6 and the second inward protruding portion 75 of the outer lock ring 7 are also arranged in the axial direction in the same manner as the first outward and inwardly projecting portions 64, (See Figs. 11 and 12 (c)). As shown in Fig.

As described above, when the first outward projecting portion 64 and the first inward projecting portion 74 are disposed at different positions, the protrusions 64 and 74 are softly attached to the inner and outer peripheral surfaces 80 and 81 of the connection pipe 8 . The first outwardly projecting portion 64 is provided at the apex of the bulging portion 62 of the inner lock ring 6 and the first inwardly projecting portion 74 is disposed at the apex of the bulging portion 62 of the outer lock ring 7, The first outwardly projecting portion 64 and the first inwardly projecting portion 74 can be provided with a sufficient movable distance by the curved shape of the bulged portion and the constricted portion, It is possible to realize the installation of the first outward projecting portion 64 and the first inward projecting portion 74 having a small insertion resistance.

In the pipe joint 1 of the present embodiment, since the second outward projecting portion 65 and the second inward projecting portion 75 are also disposed at different positions, as shown in Fig. 12 (c), the projecting portion It is possible to arrange a seal member such as a seal ring, thereby achieving high sealability.

The material of the lock rings 6, 7 capable of achieving the same functions as described above is not particularly limited as long as it is rigid and has appropriate elasticity, but it can be formed of a plastic material or a metal material. Particularly, when molding with a plastic material, it is preferable to use an engineering plastic material such as polyphenylsulfone (PPSU) resin or polyphenylene sulfide (PPS) resin as a material.

The pipe joint 1 of the present embodiment is provided with two seals 9, 9 'on the outer circumferential surface 40 of the inner cylinder 4 so as to seal the gap with the connection pipe 8 11). The seal rings 9 and 9 'are fixed by forming grooves 46 and 46' on the outer peripheral surface 40 of the inner cylinder 4 and accommodating them therein. The cross-sectional shape of the sealing ring is not particularly limited, but in this embodiment, a sealing ring having an O-shaped cross-sectional shape is used.

The seal ring can be placed on the outer peripheral surface 40 of the inner cylinder 4 or on the inner peripheral surface 50 of the outer cylinder 5 or on both the peripheral surfaces 40 and 50 thereof. However, in the case of the pipe joint 1 of the present embodiment, for the purpose of exerting the influence of dust or dust intruding from the outside as much as possible, and to maintain the seal state even when the outer cylinder 5 is damaged for some reason, The seal rings 9 and 9 'are disposed on the outer peripheral surface 40 of the inner shell 4. The arrangement of the seals 9, 9 'is such that when a circular pipe such as an aluminum three-layer pipe is connected to the pipe joint by the pipe joint 1, the metal parts exposed at the end face are prevented from being corroded It also helps.

Two or more seals may be arranged on the outer circumferential surface 40 of the inner cylinder 4 as in this embodiment. However, at least one seal ring is provided on the outer side of the second outward protruding portion 65 of the inner lock ring 6 in the axial direction (outer) than the second outward protruding portion 65 of the inner lock ring 6 in order to ensure high ci- .

The seal ring 9 is disposed at a position opposite to the second inward projection 75 of the outer lock ring 7 as described above so that the pressure contact force of the second inward projection 75 after attachment of the connection tube The stronger seal effect can be obtained. When the seal rings 9 and 9 'are disposed on the outer circumferential surface 40 of the inner cylinder 4, the seal ring 9 is positioned in the axial direction And the second outward projection 65 of the inner lock ring 6 is disposed on the axially inner side of the second inward projection 75 of the outer lock ring 7 .

In order to reduce the rickety of the connection pipe 8 after the mounting, the seal rings 9, 9 'of the present embodiment have the same inner lock ring 6 attached therebetween So as to be divided into a forward part and a rear part.

Although not shown, according to the present invention, the second outward protruding portion 65 of the inner lock ring 6 and the second inward protruding portion 75 of the outer lock ring 7 are disposed at positions opposed to each other in the axial direction The connection pipe 8 may be arranged so as to hang. In this case, since the connecting tube 8 is engaged by the second outward and inwardly projecting portions 65 and 75 from the same position facing the inner circumferential surface 80 and the outer circumferential surface 81, the connecting tube 8 is connected extremely strongly .

12, the outer cylinder 5 of the pipe joint 1 of the present embodiment has an insertion check hole (not shown) for confirming that the connecting pipe 8 is inserted to a predetermined position of the receiving portion 10 56). The insertion confirmation hole 56 is an opening penetrating the front and rear surfaces of the outer cylinder 5 and disposed axially inwardly of the outer lock ring 7. In addition, in the insertion confirmation hole 56, a C-shaped or O-shaped sealing member 101 having a bar member 101 set in the insertion confirmation hole 56 is formed in the insertion confirmation hole 56, The rod member 102 is inserted into the connecting tube 8 so that the end of the connecting tube 8 pushes the ring component 102 inwardly so that the rod member 101 is pushed toward the inside of the outer cylinder 5 The insertion confirmation means 100 of the type that is pulled in from the outside to the inside is disposed in the receiving portion 10 of the pipe joint 1. [ In addition, the insertion checking means 100 is omitted in the other drawings.

Although not shown in the present embodiment, the pipe joint 1 of the present invention is a ring-shaped component, and a ring-shaped member for receiving the tip of the connecting pipe 8 is provided on one end face And the other end face (side face) of the insertion guide ring can be disposed in the accommodating portion 10 with its edge portion being chamfered or rounded.

The insertion guide ring covers the front end of the connecting pipe when inserting the connecting pipe, and guides the connecting pipe from the axially outer side to the inside side in the receiving portion (10) of the pipe joint (1). The pipe joint 1 including the inner lock ring 6 and the outer lock ring 7 or the seals 9 and 9 'and the like can be prevented from being damaged even when the end of the connection pipe 8 is cut off sharply. (10) is protected from being damaged by the sharp connecting pipe (8). Therefore, it is preferable that the insertion guide ring is formed of a smooth material such as nylon resin.

Figs. 12 (a) to 12 (c) are schematic diagrams showing a method of using the one-touch pipe joint 1 according to the preferred embodiment of the present invention. 12 (b) shows a state in which the distal end of the connecting tube 8 is inserted into the bulge portion 62 of the inner lock ring 6 A first outward protrusion 64 provided at a vertex and a first inward protrusion 74 provided at a vertex opposite to the constricted portion 72 of the outer lock ring 7 are in contact with each other, c show a state in which the insertion and fixing of the connection pipe is completed.

The connecting pipe 8 is inserted into the receiving portion 10 from the insertion port 11 of the pipe joint 1 as shown in Figs. 12 (a) and 12 (b). The connecting pipe 8 is provided with a first outward protrusion 64 provided on the bulging portion 62 of the inner lock ring 6 and a second outward protrusion 64 provided on the constricted portion 72 of the outer lock ring 7, The protruding portion 74 is pushed in the radial direction and the tip of the protruding portion 74 is brought into contact with the insertion confirmation means 100 disposed in the receiving portion 10. [

12 (c), the connecting pipe 8 is further pushed into the deepest portion of the accommodating portion 10. [ At this time, the inner lock ring 6 and the outer lock ring 7 are locked by the bulging portions 62, the first outward protruding portion 64 provided on the constricted portion 72 and the first inward protruding portion 74 , And is engaged with the inner peripheral surface (80) and the outer peripheral surface (81) of the connecting pipe (8). The inner lock ring 6 and the outer lock ring 7 follow the operation of the connecting pipe 8 and are inserted into the insertion port 11 when the connecting pipe 8 moves toward the insertion port 11 (Pull-out direction). The free end 61 of the inner lock ring 6 enters the region of the tapered wall 45 of the inner cylinder 4 and the inner lock ring 6 is locked by the tapered wall 45, 2 outward protruding portion 65 is pressed against the inner circumferential surface 80 of the connecting pipe 8. [ The free end 71 of the outer lock ring 7 enters the region of the tapered wall 55 of the outer cylinder 5 and the outer lock ring 7 is rotated by the interaction with the tapered wall 55 And the second inward projection 75 is pressed against the outer circumferential surface 81 of the connecting tube 8.

As a result, in the pipe joint 1 of the present embodiment, when the connecting pipe 8 is inserted, the first outward protruding portion 64 and the first inward protruding portion 64 of the inner lock ring 6 and the outer lock ring 7 The connecting pipe 8 is connected to the second outward protruding portion 65 and the second inward protruding portion 75 in a direction in which the tapered wall is in contact with the tapered wall By the action, it is stopped securely and firmly.

When the connecting pipe 8 is pushed into the deepest portion of the receiving portion 10, the insertion confirming member also comes into contact with the distal end of the connecting pipe 8 and is pushed into the deepest portion of the receiving portion 10. As a result, the rod-like member 101, which has been set so as to protrude outward from the inserting hole 56 of the outer cylinder 5 before being inserted into the connecting pipe, is pulled into the receiving portion 11 of the pipe joint 1 Therefore, the operator can easily confirm that the inserted connection pipe 8 reaches the predetermined position of the accommodating portion 10 and the connection is completed.

One … ... One-touch pipe joint
2 … ... socket
3 ... ... The joint body
30 ... ... Passage opening
31 ... ... Tip
4 … ... My body
40 ... ... Outer circumferential surface
41 ... ... flange
42 ... ... extension
43 ... ... point
44 ... ... Fixed wall
45 ... ... Tapered wall
46, 46 '... ... Groove
5 ... ... Outer cylinder
50 ... ... Inner circumferential surface
51 ... ... Connection groove
52 ... ... point
53 ... ... Outer circumferential surface
54 ... ... Fixed wall
55 ... ... Tapered wall
56 ... ... Insert check box
6 ... ... Inner locking ring
60 ... ... Fixed end
61 ... ... Free end
62 ... ... Bulging
63 ... ... Slit
64 ... ... The first outward protrusion
65 ... ... The second outward projection
7 ... ... Outer lock ring
70 ... ... Fixed end
71 ... ... Free end
72 ... ... The constricted portion
73 ... ... Slit
74 ... ... The first inward projection
75 ... ... The second inward projection
8 … ... Connection pipe
80 ... ... Inner circumferential surface
81 ... ... Outer circumferential surface
9, 9 '... ... Sealing
10 ... ... Receiving portion
11 ... ... parenthesis
100 ... ... Insertion confirmation means
101 ... ... The rod-
102 ... ... Ring part

Claims (10)

A joint body,
And a tapered wall having a tapered wall continuously extending toward the outer side in the axial direction is formed on an outer circumferential surface and an inner cylinder extending from the joint body toward the outer side in the axial direction, Wow,
An outer cylinder disposed outside the inner cylinder and defining a receiving portion for receiving the connecting pipe between the outer cylinder and the inner cylinder;
A tubular body having a plurality of slits for forming a free end of a cantilever, wherein when the connection tube is inserted, the inner circumferential surface of the connecting tube is compressed by elastic deformation of the tubular body A first outward projecting portion which is provided at the free end and which presses the inner circumferential surface of the connecting tube by elastic deformation of the tubular member when the connecting tube is inserted, And an inner lock ring having a second outward protrusion for stopping the connecting pipe and disposed axially movably between the fixing wall of the inner cylinder and the tapered wall,
When the connection pipe is moved to the predetermined position of the accommodating portion and then moved in the withdrawing direction, the inner lock ring is moved in the withdrawing direction together with the connection pipe by the first outward projection protruding from the inner circumferential surface of the connection pipe And the inner lock ring enters the tapered wall region of the inner cylinder so that the inner lock ring makes contact with the inner circumferential surface of the connecting tube by the interaction with the tapered wall A tube joint characterized by being pierced. A joint body,
An inner cylinder extending from the joint body toward the outer side in the axial direction,
And a tapered wall that is continuously reduced in diameter toward the outer side in the axial direction is formed on the inner peripheral surface and is disposed outside the inner cylinder so as to receive the connecting tube between the inner cylinder and the inner cylinder, An outer tubular body forming a receiving portion for the outer tubular body,
A tubular body having a plurality of slits for forming a free end of a cantilever, the first inward protruding portion pressing the outer circumferential surface of the connecting tube by elastic deformation of the tubular body when the connecting tube is inserted, And a second inward projection portion for pressing the inner circumferential surface of the connection tube by elastic deformation of the tubular body when the connection tube is inserted and stopping the connection tube when the connection tube is pulled out And an outer lock ring movably disposed axially between the fixed wall of the outer cylinder and the tapered wall,
When the connection pipe is moved to the predetermined position of the accommodating portion and then moved in the withdrawing direction, the outer lock ring is moved in the withdrawing direction together with the connection pipe by hanging the first inwardly projecting portion on the outer peripheral surface of the connection pipe , The free end of the outer lock ring enters the tapered wall area of the outer cylinder and the outer lock ring causes the second inward projection to be in pressure contact with the outer circumferential surface of the connection tube by interaction with the tapered wall Wherein the pipe joint is reduced in diameter. A joint body,
An inner cylinder extending from the joint body toward the outer side in the axial direction and having a tapered wall continuously extending in the axial direction toward the outer side,
A receiving portion for receiving the connecting pipe is formed between the inner cylinder and the outer cylinder so as to have a fixed wall parallel to the radial direction and a tapered wall which is continuously reduced in diameter toward the outer side in the axial direction on the inner circumferential surface, And,
A first outward protruding portion for pressing the inner circumferential surface of the connecting tube by elastic deformation of the tubular member at the time of inserting the connecting tube, And has a second outward projection portion that presses the inner circumferential surface of the connection tube by elastic deformation of the tubular body when the connection tube is inserted and stops the connection tube when the connection tube is pulled out, An inner lock ring movably disposed in an axial direction between the fixed wall of the cylinder and the tapered wall,
A first inward protruding portion for pressing the outer circumferential surface of the connecting tube by elastic deformation of the tubular body when the connecting tube is inserted; And has a second inward projection portion that presses the inner circumferential surface of the connection tube by elastic deformation of the tubular body when the connection tube is inserted and stops the connection tube when the connection tube is pulled out, A pipe joint having an outer lock ring movably disposed axially between a fixed wall of a sieve and a tapered wall,
When the connection pipe is moved to the predetermined position of the accommodating portion and then moved in the withdrawing direction, the inner lock ring is moved in the withdrawing direction together with the connection pipe by the first outward projection protruding from the inner circumferential surface of the connection pipe And the inner lock ring enters the tapered wall region of the inner cylinder so that the inner lock ring makes contact with the inner circumferential surface of the connecting tube by the interaction with the tapered wall And the outer lock ring is moved in the withdrawing direction together with the connecting pipe by the first inwardly projecting portion being hooked to the outer circumferential surface of the connecting pipe and the free end of the outer lock ring is moved in the tapered wall region By the interaction with the tapered wall, the outer lock ring presses the second inwardly projecting portion against the outer peripheral surface of the connection tube And the pipe joint is reduced in diameter. The method of claim 3,
Wherein the inner lock ring has a bulging portion that is curved toward the outside in the radial direction to the body portion and the outer lock ring has a constricted portion curved inward in the radial direction in the body portion Pipe joint. The method of claim 3,
Wherein the first outwardly projecting portion is disposed axially inwardly of the second outwardly projecting portion and the first inwardly projecting portion is disposed axially inwardly of the second inwardly projecting portion. The method of claim 3,
Wherein the first outwardly projecting portion is disposed at a position different from the first inwardly projecting portion in the axial direction and the second outwardly projecting portion is disposed at a position different from the second inwardly projecting portion in the axial direction. Joints. The method of claim 3,
The outer circumferential surface of the inner cylinder has at least one seal ring at a position facing the second inward projecting portion so as to seal the gap with the connection tube, Wherein at least one seal ring is provided at a position opposite to the second outward projecting portion to seal the gap. The method of claim 3,
Wherein the inner or outer lock ring is formed of a plastic material or a metal material of polyphenyl sulfone (PPSU) resin or polyphenylene sulfide (PPS) resin. 4. The method according to any one of claims 1 to 3,
Wherein the outer cylinder has a through hole for visually confirming whether the connecting pipe is inserted into the receiving portion directly or indirectly through the insertion confirming member. 4. The method according to any one of claims 1 to 3,
Wherein the joint body and the inner cylinder are integrally molded.

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