JP2004125129A - Pipe connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent improvident release of connection caused by improper operation in a constitution in which two pipes as objects to be connected are connected by fitting a plug cylinder attached to an end of one pipe into a socket cylinder attached to an end of the other pipe. <P>SOLUTION: A lock means is constructed such that a lock ring 3 is arranged between a ring groove 13 formed circumferentially on the fitting peripheral surface of the socket cylinder 1 and a stopper edge 22 formed circumferentially on the fitting peripheral surface of the plug cylinder 2 to thereby lock the socket cylinder 1 and the plug cylinder 2 by the lock ring 3 so that the plug cylinder 2 may not be disconnected from the socket cylinder 1. A release ring 4 is fitted on the proximal end portion of the plug cylinder 2 in a longitudinally slidable manner. By sliding the release ring 4 in the fitting-in direction of the plug cylinder 2, the diameter of the lock ring 3 is enlarged and the lock ring 3 is deformed so as to perform the lock release. The release of connection between the socket cylinder 1 and the plug cylinder 2 is realized by moving the plug cylinder 2 in the reverse direction to that of operation of the release ring 4 after releasing the lock. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
INDUSTRIAL APPLICABILITY The present invention is used for connection of various pipes, and it is possible to easily perform a secure lock in a connected state and release of this lock, and effectively prevent an erroneous release operation from being performed. It relates to a plumbing fitting to be obtained.
[0002]
[Prior art]
Connecting a pipe for transferring a fluid such as a gas, a liquid, or a powder is an important technique required in various industrial fields, and various connecting means have conventionally been employed. Flange joints and threaded joints, which are the most common connection means, provide a secure connection under good sealing, but the procedure for connection and separation is complicated, and permanent connection that does not originally require separation Is widely used in typical connection locations.
[0003]
On the other hand, in connection places where connection and disconnection of pipes are frequently performed, realization of connection means capable of making connection and disconnection by simple operation is keenly desired, and a pipe connector used for this type of connection is required. Conventionally, various proposals have been made (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-8-296777
[Problems to be solved by the invention]
However, in such a pipe connector, in addition to being able to connect and disconnect as easily as possible, a connection state under a good seal is reliably maintained, and a possible incorrect operation can be performed. Although it is necessary to respond to the conflicting requirement that inadvertent separation does not occur, there is no pipe fitting that can meet all the requirements in the past.
[0006]
The pipe connector described in Patent Literature 1 has narrow flanges provided around an end face of a pipe to be connected, and the peripheries of these flanges butted with each other can be freely opened and closed at one circumferential position. And is constrained to be inseparable by being clamped by connecting metal fittings connected to the connector.
[0007]
In this configuration, there is a possibility that the connection fittings, which are exposed to the outside, may be detached from the flange by the action of an external force supposed in use, thereby separating the released tubes. This problem can be solved by fastening the open side of the connection fitting sandwiching the flange inseparably with a fastening means such as a screw or a clip, but this impairs the easiness of connection and separation operations. Become.
[0008]
In addition, a pipe connection tool having a configuration in which a socket cylinder is attached to an end of one pipe to be connected and a plug cylinder is attached to the other end, and the plug cylinder is fitted into the socket cylinder to realize connection. There is. This type of pipe connector has an advantage that the operation for connection and disconnection is extremely easy. For example, an application for connecting a gas hose of various gas appliances to a main tap of a gas drawn into a home. Etc. are widely used.
[0009]
However, in this type of conventional pipe connection device, the structure of the lock means for retaining the plug cylinder and the socket cylinder which are fitted and connected, and for maintaining the connection state is such that the lock state by the lock means is released. There is a problem that it is complicated including the structure of the means.
[0010]
Further, in the pipe connector used for connecting the gas hose described above, a so-called one-touch coupler, since the operation direction of the unlocking means is set to the same direction as the direction of extracting the socket tube and the plug tube, For example, when an external force in the withdrawal direction is applied for the purpose of checking the connection state or the like, the lock is released along with this, and the connection is accidentally released, which may cause a problem such as outflow of the internal fluid. there were. In addition, a stopper for stopping the outflow of gas in response to disconnection is separately provided in the main valve of the gas to which the above-described gas hose is connected, and safety measures against erroneous disconnection are taken.
[0011]
The present invention has been made in view of such circumstances, and in a configuration in which two tubes to be connected are connected by fitting a plug tube and a socket tube attached to respective ends thereof, both tubes cannot be pulled out. Lock means for maintaining the connection state by restraining the lock means, and unlock means for releasing the restraint by the lock means are realized by a simple configuration, and inadvertent connection release due to erroneous operation of the lock release means is effectively achieved. An object of the present invention is to provide a pipe connector that can be prevented.
[0012]
[Means for Solving the Problems]
A pipe connector according to a first aspect of the present invention includes a socket tube attached to an end of a first tube, a plug tube attached to an end of a second tube, and fitted into the socket tube. In a pipe connector including a lock unit that locks the plug cylinder and the socket cylinder so that they cannot both come out on the fitting circumference, and a lock release unit that releases a lock state by the lock unit, the lock release unit includes: The lock state is released by an operation in a direction in which the plug cylinder is fitted into the socket cylinder.
[0013]
In the present invention, the locked state of the locking means for locking the socket cylinder and the plug cylinder so that they cannot be pulled out is released by operating the unlocking means in the direction of fitting, and the plug cylinder is held while maintaining this released state. The connection is released by pulling out in the direction opposite to the fitting direction. At this time, operations opposite to each other are required, and careless disconnection can be prevented.
[0014]
Further, a pipe connector according to a second aspect of the present invention includes a socket tube attached to an end of a first tube, a plug tube attached to an end of a second tube and fitted into the socket tube, And a lock means for locking both of them so that they cannot come out on the fitting circumference of the socket cylinder, and a lock release means for releasing a locked state by the lock means, wherein the lock means comprises the socket cylinder A stopper groove which is provided on the fitting peripheral surface of the plug cylinder and is located on the inner side of the ring groove by being fitted into the socket cylinder; and A lock ring held in a ring groove to allow the plug cylinder to be fitted by expanding the diameter by the action of the stopper edge, while preventing the plug cylinder from coming into contact with the stopper edge when the plug cylinder is withdrawn. Wherein the lock release means is interposed slidably in the axial direction between the outer periphery of the plug cylinder closer to the base end than the stopper edge and the inner periphery of the socket cylinder. A release ring that acts on the lock ring when sliding in the direction of fitting of the cylinder, expands the lock ring in diameter, and releases the lock.
[0015]
In the present invention, when the plug cylinder is fitted into the socket cylinder, the stopper rim provided on the outer peripheral surface of the plug cylinder acts on the lock ring held in the ring groove provided on the inner peripheral surface of the socket cylinder, and the lock is formed. The ring reaches the inner side of the ring groove while expanding the diameter of the ring, and the plug cylinder in this state is prevented from being pulled out by the lock ring that abuts the stopper edge and the ring groove, achieving a locked state I do. To release this locked state, a release ring slidably held on the plug cylinder is pressed in the direction of fitting, and a part of this release ring is made to act on the lock ring to expand and deform the stopper ring. The plug is allowed to pass in the extraction direction, and in this state, the plug cylinder is extracted and the connection is released.
[0016]
Further, the pipe connector according to the third invention is characterized in that the stopper edge and the release ring in the second invention are provided with a tapered surface which is reduced in diameter in the direction of the fitting at the action portion to the lock ring. .
[0017]
According to the present invention, a tapered surface is provided on the stopper edge and a portion of the release ring that acts on the lock ring, and the diameter of the lock ring is expanded smoothly by the action of the tapered surface, thereby improving the operability of locking and unlocking. Plan.
[0018]
Further, the pipe connector according to the fourth invention is interposed between the socket cylinder and the release ring according to the second invention or the third invention so as to be changeable in the axial direction, and is fitted to the socket cylinder. And a regulating ring for regulating sliding of the release ring in a direction.
[0019]
In the present invention, the restricting ring is interposed between the socket cylinder after the locked state is obtained and the release ring, and the operation of the release ring for releasing the lock is restricted, whereby the connection is inadvertently released. The fear is more reliably prevented.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings showing an example of the embodiment. 1 and 2 are side sectional views showing a use state of the pipe connector according to the present invention. FIG. 1 shows a state after connection, and FIG. 2 shows a state before connection.
[0021]
As shown in these drawings, the pipe connector according to the present invention includes a socket tube 1 and a plug tube 2 both having a cylindrical shape, and further includes a lock ring 3, a release ring 4, and a restriction ring 5.
[0022]
On one side of the socket tube 1, first tube P ₁ to be connected, but also at one side of the plug tube 2, a second tube P ₂ is connected to the respective coaxial to be connected . In FIG., The first tube P ₁ is connected by screwing to the ipsilateral outer periphery formed pipe thread of the socket tube 1, second tube P ₂ is, to the side of the plug barrel 2 After the outer fitting, they are connected by caulking them integrally with the caulking tube 6 placed on the outside, but these connections can also be made respectively by other connecting means.
[0023]
On the other side of the socket tube 1, a fitting hole for fitting the plug tube 2 is opened. The fitting hole includes a large-diameter fitting hole 10 that is continuous with the opening on the end face, and a small-diameter fitting hole 12 that is continuously provided through a tapered hole 11 that tapers in a tapered shape inside the hole. A concave ring groove 13 for accommodating the lock ring 3 is provided around the middle surface of the large-diameter fitting hole 10, and a sealing ring is provided on the middle surface of the small-diameter fitting hole 12. A concave O-ring groove 15 in which an O-ring 14 is accommodated is provided.
[0024]
FIG. 3 is an external perspective view of the lock ring 3. As shown in this figure, the lock ring 3 is a ring made of a high-strength material having high elasticity such as spring steel and resin and having a circular cross section with a small diameter, and provided with a cutout portion 30 having an appropriate width at one position in the circumferential direction. It is formed in a shape, and is capable of expanding and contracting the diameter with the expansion and contraction of the missing portion 30. The natural length of the lock ring 3 is set so that its center diameter is substantially equal to the inner diameter of the large-diameter fitting hole 10, and when housed in the ring groove 13 as shown in FIG. Project from the inner surface of the large-diameter fitting hole 10.
[0025]
The ring groove 13 has a shallow bottom having a depth approximately half the thickness of the lock ring 3 on the opening side of the large-diameter fitting hole 10, and a large diameter of the lock ring 3 on the inner side of the large-diameter fitting hole 10. Each is provided with a deep bottom portion having a depth greater than or equal to the depth, and further provided with a tapered surface which is reduced in diameter toward the opening side so as to communicate between them.
[0026]
As is well known, the O-ring 14 is a continuous ring having a circular cross section made of an elastic material such as rubber, resin, or the like. It is fitted.
[0027]
The restricting ring 5 is wound on the outer peripheral surface of the large-diameter fitting hole 10 of the socket tube 1 configured as described above on the opening side. FIG. 4 is an external perspective view of the restriction ring 5. As shown in this figure, the restricting ring 5 is formed by bending a thin strip in the thickness direction from a material having a high elasticity similar to that of the lock ring 3 and having a cutout at one location in the circumferential direction. The missing portions are provided with overlapping portions 50 and 51 having half widths overlapped over an appropriate length in the circumferential direction, and the distal ends thereof are bent radially outward to form operation pieces 52 and 53. Have been.
[0028]
The restricting ring 5 configured as described above has a missing portion by gripping each of the operation pieces 52 and 53 with, for example, a finger and applying a circumferential force in the opposite direction as indicated by an arrow in the drawing. In this expanded state, the socket tube 1 is loosely fitted to the outer periphery of the socket tube 1, the application of the circumferential force is released, and the socket tube 1 is wound as shown in FIG. 2. The outer circumference of the socket tube 1 is provided with a reduced diameter portion 16 whose outer diameter is reduced from the end portion to an appropriate length, and the regulating ring 5 is moved in the axial length direction in the expanded state, As shown in FIG. 1, it is also possible to wind around the reduced diameter portion 16.
[0029]
On the other hand, the other side of the plug cylinder 2 is provided with a fitting portion for fitting into the socket cylinder 1. The fitting portion has a tip fitting portion 20 having an outer diameter substantially equal to the inner diameter of the small-diameter fitting hole 12, a diameter larger than the tip fitting portion 20, and substantially equal to the inner diameter of the lock ring 3. A base end fitting portion 21 having an outer diameter, and a short stopper edge 22 located between them and having an outer diameter substantially equal to that of the large-diameter fitting hole 10 are provided. The stopper edge 22 and the distal end fitting portion 20 are connected by a tapered surface 23 whose diameter gradually decreases toward the distal end so as to correspond to the tapered hole 11 of the socket tube 1. The joint portion 21 is communicated with a stopper surface 24 cut in a tapered shape toward the distal end side.
[0030]
The release ring 4 is fitted to the base end fitting portion 21 so as to be slidable in the axial direction. As shown, the release ring 4 is a long ring having a thin cylindrical shape, and has an outer diameter substantially equal to the inner diameter of the large-diameter fitting portion 10 of the socket tube 1 and the outer diameter of the stopper edge 22. are doing. At one end in the longitudinal direction of the release ring 4, a flange-shaped operating portion 40 projecting outward in the radial direction is provided around, and at the other end, the diameter is reduced in a tapered shape toward the end. A guide surface 41 is provided.
[0031]
A positioning ring 42 for positioning the release ring 4 is wound around the base fitting portion 21 on which the release ring 4 is externally fitted. Like the lock ring 3, the positioning ring 42 is a ring having a small diameter circular cross-section having a cutout at one location in the circumferential direction and capable of expanding and contracting. Are housed in concave grooves 25 (see FIGS. 5 and 6) provided on the outer periphery of the middle portion of the release ring 4 and are provided on the inner peripheral surface of the middle portion of the release ring 4 and the inner peripheral surface of the end portion on the operation portion 40 side, respectively. At the positions corresponding to the positioning grooves 43 and 44 (see FIGS. 5 and 6), the diameters of the release rings 4 are expanded and engaged with each other, thereby restraining the release ring 4 from sliding in the axial direction.
[0032]
FIG. 5 is an explanatory diagram of a connection procedure using the pipe connector according to the present invention configured as described above. This connection is performed by fitting the fitting portion of the plug tube 2 into the fitting hole of the socket tube 1. As shown in FIG. 5 (a), the fitting is such that the distal end fitting portion 20 of the plug cylinder 2 is internally fitted into the small diameter fitting hole 12 of the socket cylinder 1, and The fitted release ring 4 advances so as to be fitted inside the large-diameter fitting hole 10 of the socket tube 1.
[0033]
Due to the fitting, the lock ring 3 is expanded and deformed in the deep bottom portion of the ring groove 13 by the action of the tapered surface 23 continuous with the distal end fitting portion 20, and rides on the stopper edge 22 continuous with the tapered surface 23. After that, it reaches the base end fitting portion 20 having a diameter smaller than that of the stopper edge 22, and is reduced in diameter by its own elasticity, and as shown in FIG. As a result, the connection state as shown in FIG. 1 and FIG. 1 is realized.
[0034]
During this time, the release ring 4 is positioned in the axial direction by engaging the positioning ring 42 wound around the base end fitting portion 20 with the positioning groove 43 provided on the inner peripheral surface of the intermediate portion. The positioning secures the recess.
[0035]
During this time, the O-ring 14 wound around the O-ring groove 15 on the inner surface of the small-diameter fitting hole 12 of the socket tube 1 is in a state of elastic contact with the outer peripheral surface of the tip fitting portion 20 of the plug tube 2. In addition, sealing around the fitting periphery of the plug cylinder 2 is performed. A plurality of O-rings 14 can be arranged side by side in the axial direction, whereby the sealing performance can be enhanced, and reliable sealing can be realized even in a high-pressure fluid conveyance pipeline.
[0036]
In the connection state shown in FIG. 5B, the outer half of the lock ring 3 faces both side surfaces of the ring groove 13, and the inner half also faces the stopper surface 24 of the stopper edge 22. Therefore, when a force is applied to the socket tube 1 and the plug tube 2 in this state to separate them from each other, these move relatively in the axial direction within the width range of the ring groove 13 and are moved in FIG. 3C, the lock ring 3 enters the shallow portion of the ring groove 13 and is clamped between the side surface of the shallow portion and the stopper surface 24 so that the socket tube 1 and the plug tube 2 are further moved relative to each other. It functions to restrain the movement and lock the two cylinders 1 and 2 inseparably.
[0037]
At this time, the lock ring 3 is tightly clamped between the bottom surface of the shallow portion of the ring groove 13 and the outer peripheral surface of the base end fitting portion 21, and is in a state where the diameter cannot be expanded (and reduced). Therefore, even if a force is applied to the socket tube 1 and the plug tube 2 to pull them out, there is no possibility that the state of the lock ring 3 held between the side surface of the ring groove 13 and the stopper surface 24 is impaired. The connection between the first and second pipes P ₁ and P ₂ by the socket tube 1 and the plug tube 2 is stably maintained even when an excessive pulling force is applied.
[0038]
On the other hand, when a force is applied to the socket tube 1 and the plug tube 2 in a direction of fitting them, the movement of the plug tube 2 due to the action of this force is caused by the tapered surface 23 on the inner surface of the plug tube 2 and the taper surface 23 on the outer surface of the socket tube 1. The contact with the hole 11 restricts the connection at the position shown in FIG. 5B, and the connection state described above is maintained.
[0039]
As described above, in the pipe connector according to the present invention, connection can be realized by a simple operation of fitting the plug cylinder 2 into the socket cylinder 1. Further, since this connection state is maintained between the position shown in FIG. 5B and the position shown in FIG. 5C, between the first and second pipes P ₁ and P ₂ . Can be connected to a certain extent in the axial direction, and can be securely connected. The sealing at each position can be performed on the fitting circumference of the socket tube 1 and the plug tube 2 as described above. Satisfactorily realized by the O-rings 14 arranged in the first position. This can be used as a useful effect in various piping systems.
[0040]
In FIG. 5C, the position of the restriction ring 5 is changed in the axial direction, and the restriction ring 5 is wound around the reduced diameter portion 16 on the outer periphery of the socket tube 1. The restricting ring 5 wound in this manner is interposed between the step portion on one side of the reduced-diameter portion 16 and the operation portion 40 provided around the end of the release ring 4 as shown in FIG. 4 and an operation of restricting relative movement in the axial direction between the plug cylinder 2 and the socket cylinder 1 for externally holding the same.
[0041]
Thereby, the connection state shown in FIG. 5C, that is, the connection state in which the socket cylinder 1 and the plug cylinder 2 are locked so as not to be movable in the axial length direction and the radial direction, can be maintained. For this reason, the operation of a release ring 4 described later is also restricted, so that an erroneous connection release operation can be completely prevented. Changing the position of the restriction ring 5 can be easily realized by applying a gripping force to the operation pieces 52 and 53.
[0042]
FIG. 6 is an explanatory diagram of a disconnection procedure by the piping connector according to the present invention. To release the connection, first, the restriction ring 5 is detached from the reduced diameter portion 16 and repositioned to the position shown in FIG. 6 (a). As indicated by the arrow mark, a pressing force toward the socket tube 1 is applied.
[0043]
Due to the application of this pressing force, the release ring 4 slides along the base end fitting portion 21 of the plug cylinder 2 with the diameter reduction deformation of the positioning ring 42 engaging with the positioning groove 43 on the inner circumference, and 1 is pressed into the large-diameter fitting hole 10, and the guide surface 41 at the tip of the release ring 4 abuts on the lock ring 3. The lock ring 3 is formed by the action of the tapered guide surface 41. The diameter of the release ring 4 is expanded and deformed in the deep bottom portion of the groove 13 and rides on the peripheral surface of the release ring 4 continuous with the guide surface 41 as shown in FIG. At this time, the guide surface 41 at the tip of the release ring 4 is aligned with the stopper surface 24 at the same side end of the stopper edge 22, and the peripheral surface of the release ring 4 is Continued on the peripheral surface.
[0044]
Next, while maintaining the pushing state of the release ring 4, a force is applied to the plug cylinder 2 in a direction of pulling out from the socket cylinder 1 as shown by an outline arrow in FIG. As a result, the lock ring 3 riding on the peripheral surface of the release ring 4 moves to the peripheral surface of the stopper edge 22 continuous with the peripheral surface, and further reaches the tapered surface 23 connected to the other side of the stopper edge 22. , will be returned to the natural state by reduced diameter by its own elasticity, the plug tube 2 can easily be withdrawn from the socket tube 1 without being obstructed by the locking ring 3, first, second tube P ₁ , connection of _{P 2} is released.
[0045]
The positioning groove 43 on the inner circumference of the release ring 4 is a shallow groove as shown in the figure, and the release ring 4 can be pushed with a small force capable of slightly reducing the diameter of the positioning ring 42. The expansion of the diameter of the lock ring 3 accompanying the pushing of the release ring 4 occurs smoothly by the action of the guide surface 41 which is a gentle taper surface. As described above, the operation of the release ring 4 for releasing the lock can be performed without requiring a large force.
[0046]
When the release ring 4 is pushed down to the lock release position shown in FIG. 6B, the positioning ring 42 is positioned at the corresponding position of the positioning groove 44 provided on the inner peripheral surface of the end on the operation unit 40 side. And engages with the positioning groove 44. As a result, the release ring 4 is restrained at the lock release position, and moves when the plug cylinder 2 is subsequently pulled out, so that there is no possibility that the lock release state is impaired.
[0047]
As described above, in the pipe connector according to the present invention, first, the release ring 4 is pressed in the direction of fitting of the plug cylinder 2 to release the lock, and then the release ring 4 and the plug cylinder 2 are pulled out in opposite directions. The disconnection is realized by the stepwise operation. Such disconnection can be easily performed if the above-described procedure is understood, but the push-pull operation performed on the socket tube 1 or the plug tube 2 without intention of disconnection, and the use There is almost no risk of being realized by the action of various external forces applied in the state, and careless disconnection can be effectively prevented. In addition, by providing the above-described restriction ring 5 and restricting the operation of the release ring 4 for releasing the lock, it is possible to more reliably prevent erroneous disconnection.
[0048]
【The invention's effect】
As described in detail above, in the pipe connector according to the first aspect of the present invention, the release of the locking means for locking the socket cylinder and the plug cylinder so that they cannot come out is performed by operating the unlocking means in the direction of fitting of the plug cylinder. In order to release the connection, it is necessary to pull out the plug cylinder in the reverse direction after releasing the lock, and it is possible to effectively prevent the connection from being carelessly released due to an erroneous operation.
[0049]
Further, in the pipe connector according to the second invention of the present invention, the ring groove provided around the fitting peripheral surface of the socket cylinder, the lock ring held in the ring groove, and the fitting groove surrounding the plug cylinder. The lock means is constituted by the provided stopper edge, and the lock is released by an operation in the direction of insertion of the plug cylinder by a release ring slidably interposed between the plug cylinder and the socket cylinder. Since the means is configured, it is possible to prevent inadvertent disconnection due to an erroneous operation with a simple configuration as in the first invention.
[0050]
In the pipe connector according to the third aspect of the present invention, since the stopper edge to the lock ring and the action portion of the release ring are provided with a tapered surface, it is possible to smoothly expand and deform the lock ring at the time of locking and unlocking. The operability at the time of locking and unlocking is improved.
[0051]
Further, in the pipe connection device according to the fourth aspect of the invention, the operation of the release ring for releasing the lock is restricted by the restriction ring interposed so as to be changeable between the socket tube and the socket tube. The present invention has an excellent effect, for example, it is possible to more reliably prevent the possibility of being performed.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a use state of a pipe connector according to the present invention.
FIG. 2 is a side sectional view showing a use state of the pipe connector according to the present invention.
FIG. 3 is an external perspective view of a lock ring.
FIG. 4 is an external perspective view of a regulating ring.
FIG. 5 is an explanatory diagram of a connection procedure using the pipe connection device according to the present invention.
FIG. 6 is an explanatory diagram of a disconnection procedure using the pipe connection device according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Socket cylinder 2 Plug cylinder 3 Lock ring 4 Release ring 5 Restriction ring P ₁ First pipe P ₂ Second pipe 13 Ring groove 22 Stopper edge 23 Tapered surface 41 Guide surface

Claims (4)

A socket tube attached to the end of the first tube, a plug tube attached to the end of the second tube and fitted into the socket tube, and a fitting tube between the plug tube and the socket tube. A pipe connector comprising: a lock means for locking both of them so that they cannot come out; and a lock release means for releasing a lock state by the lock means.
The pipe connection tool, wherein the lock release means is configured to release the locked state by an operation in a direction in which the plug cylinder is fitted into the socket cylinder. A socket tube attached to the end of the first tube, a plug tube attached to the end of the second tube and fitted into the socket tube, and a fitting tube between the plug tube and the socket tube. A pipe connector comprising: a lock means for locking both of them so that they cannot come out; and a lock release means for releasing a lock state by the lock means.
The lock means,
A ring groove provided on the fitting peripheral surface of the socket cylinder,
A stopper edge which is provided around the fitting peripheral surface of the plug cylinder and which is located on the inner side of the ring groove by being fitted into the socket cylinder,
A lock ring, which is held in the ring groove and allows the plug cylinder to be fitted by expanding the diameter by the action of the stopper edge, while preventing the plug cylinder from being brought into contact with the stopper edge when the plug cylinder is withdrawn. Prepare,
The lock release means,
It is interposed slidably in the axial direction between the outer periphery of the plug cylinder closer to the proximal end than the stopper edge and the inner periphery of the socket cylinder, and when sliding in the direction of fitting of the plug cylinder. A pipe connector comprising a release ring that acts on the lock ring to expand the lock ring so as to unlock the lock ring. The pipe connector according to claim 2, wherein the stopper edge and the release ring include a tapered surface on an action portion of the lock ring, the diameter of which is reduced in the fitting direction. 3. A regulating ring which is interposed between the socket cylinder and the release ring so as to be capable of changing its position in an axial direction and regulates sliding of the release ring in a direction of fitting into the socket cylinder. 4. The pipe connector according to claim 3.

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