JP3876258B2 - Pipe fitting - Google Patents

Description

  The present invention relates to a pipe joint.

As a conventional pipe joint, by screwing the male thread part of the retainer into the taper female thread part of the joint body, the outer top parts of a plurality of small disks protruding from the inner peripheral surface of the retainer bite into the outer peripheral surface of the pipe, A pipe that is configured not to be pulled out in the axial direction is known (for example, Patent Document 1).
Japanese Patent No. 312385

  In this conventional pipe joint, a small disk is spirally and deeply bited around the outer peripheral surface of the pipe, so a very large tightening force is required to screw the retainer into the joint body. In short, work efficiency is poor. Moreover, the structure prevents the pulling out by several small discs that bite into the outer peripheral surface of the pipe, so if a large pulling force is applied to the pipe after the connection is completed, the pipe will come off leaving a longitudinal scratch on the outer peripheral surface of the pipe. Or the small disk may be damaged and the pipe may come off.

  Accordingly, the present invention provides a pipe joint that can be tightened and connected without requiring a large force and that can be securely and firmly connected without the possibility of coming out even if a strong pulling force is applied to the pipe in the axial direction. The purpose is to provide.

In order to achieve the above object, a pipe joint according to the present invention includes a joint main body having a male threaded portion and a cap nut screwed to the male threaded portion, and has a single cut on the circumference. C-shaped retaining ring disposed in the tapered portion of the hole of the cap nut, and a circumferential concave groove formed on the outer peripheral surface of the pipe to be connected by plastic deformation while being rotatably supported by the retaining ring. comprising a rotor which, the further the retaining ring, the inner peripheral surface thereof, the locking ridge portion for engaging with the circumferential groove, that Yusuke.

The joint body has a male threaded portion and a cap nut screwed to the male threaded portion, and has a single cut in the circumference and is disposed in a tapered portion of the hole of the cap nut. A retaining ring having a holding female portion penetrating from the inner peripheral surface to the outer peripheral surface, and an axial center parallel to the axial center of the pipe in the holding female portion a rotor forming a circumferential groove on the outer peripheral surface of the connection pipe together with the rotation can hold around abuts against the tapered portion of the hole portion of the cap nut at plastic deformation, comprising, further, the retaining ring, the inner peripheral surface thereof, the locking ridge portion for engaging with the circumferential groove, that Yusuke.

The joint main body includes a joint main body having a male screw portion and a cap nut screwed to the male screw portion, and the joint main body has an insertion tube portion that comes into contact with the inner peripheral surface of the pipe. A C-shaped retaining ring disposed in the tapered portion of the hole of the cap nut, and a circumferential recess formed on the outer peripheral surface of the pipe to be connected. and a rotor is formed by plastically deforming the groove, further, the retaining ring, the inner peripheral surface thereof, the locking ridge portion for engaging with the circumferential groove, that Yusuke.

The joint main body includes a joint main body having a male screw portion and a cap nut screwed to the male screw portion, and the joint main body has an insertion tube portion that comes into contact with the inner peripheral surface of the pipe. A C-shaped retaining ring disposed in the tapered portion of the hole portion of the cap nut, and the retaining ring is a holding female penetrating from the inner peripheral surface to the outer peripheral surface. In the holding female part so as to be able to rotate about an axis parallel to the axis of the pipe, and abuts against the tapered part of the hole of the cap nut and on the outer peripheral surface of the pipe to be connected. A rotor that forms the circumferential groove by plastic deformation is provided , and the retaining ring further includes a locking ridge portion that locks the circumferential groove on the inner peripheral surface thereof.

The present invention has the following remarkable effects.
When the cap nut is screwed into the joint body, the retaining ring is reduced in diameter, so that the locking projection is fitted into the concave groove (formed by the rotor) and is securely locked.
Therefore, the pipe is securely connected to the pipe joint, the pull-out preventing force becomes extremely large, and there is no possibility that the pipe will come out unexpectedly after construction.
During this screwing, the rotor revolves while rotating (self-rotating) in contact with the tapered portion of the cap nut, so the rotational torque of the cap nut is very small. In addition, it is easy to set the retaining ring on the cap nut and it does not take much trouble, so that the operation can be performed quickly and smoothly.
In addition, since the groove is formed by plastic deformation, chips are not generated from the pipe, the cap nut can be screwed smoothly, work is easy, connection of various places, piping Convenient to do.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
As shown in FIGS. 1 to 9, the pipe joint C according to the present invention includes a joint body 13 having a male screw part 19 and a cap nut 5 screwed to the male screw part 19.
Specifically, the cap nut 5 has a hole portion 25 into which the pipe 12 (for connection) is inserted. The hole portion 25 is formed on the rear portion 25a side of the cap nut 5 and the pipe 12 is inserted therein. Insertion hole portion 27, a circumferential step portion 28 formed at the front edge of the insertion hole portion 27, a taper portion 6 formed in an enlarged diameter from the circumferential step portion 28 toward the front portion 25b, and a front portion And a female screw portion 18 formed in 25b and screwed onto the male screw portion 19 of the joint body 13.
Here, the direction in which the cap nut 5 is screwed to the joint body 13 in the direction of the axis L of the pipe 12 is defined as the front F.

The joint body 13 has a hole portion 16 into which the pipe 12 is inserted, and a holding groove portion 20 that holds a sealing material 17 such as an O-ring is formed in the hole portion 16. The outer peripheral surface has a tapered outer surface portion 23 that comes into contact with the tapered portion 6 of the cap nut 5 when the screwing is completed.
In addition, although this joint main body 13 has shown only one part (in the cross section) (in FIG. 1, FIG. 2), the whole of this joint main body 13 is various, such as a straight, an elbow, cheese, a socket. Furthermore, a similar structure may be formed on the other end side (front F side) outside the figure.
Further, the hole 16 is formed with a circumferential abutting step portion 24 in which the tip (front end) portion 12b of the inserted pipe 12 abuts at the back portion 16a.

Furthermore, the pipe joint C includes a C-shaped retaining ring 1 having one cut 1 a on the circumference, and is disposed in the tapered portion 6 of the hole portion 25 of the cap nut 5. The outer peripheral surface 1b of the retaining ring 1 is formed in a tapered shape having the same inclination angle as that of the tapered portion 6 of the cap nut 5 (the diameter is reduced from the front side to the rear side).
The retaining ring 1 is made of a metal, stainless steel, or the like, which is made of a material that does not cause electrolytic corrosion even when it comes into contact with the pipe 12, the joint body 13, and the cap nut 5 that are inserted and fitted, and has high strength.

Further, the retaining ring 1 has a first holding female portion 31 formed near the one end 2 of the cut 1 a and is symmetrical to the first holding female portion 31 with respect to the virtual center point O of the retaining ring 1. In addition, a second holding female portion 31 is formed. Here, the leading end when the retaining ring 1 is screwed around the pipe 12 as indicated by the arrow M ₁ is defined as one end 2 and the opposite side is defined as the other end 22.
Specifically, the holding female portion 31 includes a disk-shaped large-diameter space portion 31 a formed in a hollow shape at the front and rear intermediate positions of the retaining ring 1, and an axis parallel to the axis L of the pipe 12 in the retaining ring 1. The large-diameter space portion 31a and a small-diameter hole portion 31b connected to each other are provided in the direction of the center L ₃₁ , and the large-diameter space portion 31a extends from the inner peripheral surface 1c side of the retaining ring 1 to the outer peripheral surface 1b. , Is penetrating.

A rotor 32 is held in each holding female portion 31 of the retaining ring 1 so as to be able to rotate about an axis L ₃₁ parallel to the axis L of the pipe 12.
Specifically, the rotor 32 includes a short columnar shaft portion 32b that is pivotally supported by the small-diameter hole portion 31b of the holding female portion 31, and a large-diameter space of the holding female portion 31 that is provided at the front and rear center positions of the shaft portion 32b. And a disk portion 32a that is rotatably held in the portion 31a. The outer peripheral portion of the disk portion 32a is formed in a semicircular shape (curved shape) in a longitudinal sectional view.
The rotor 32 is preferably made of a material that does not cause electrical corrosion with the retaining ring 1 or the pipe 12 and has a large strength, and is integrally formed from the same material as the retaining ring 1.
Alternatively, the rotor 32 (rather than being integrally molded) is a semicircular disc body 40 whose outer peripheral portion is semicircular in a longitudinal sectional view, and a shaft member 39 that pivotally supports a hole 40a formed at the center of the disc body 40, It is good also to comprise (refer FIG.7 (b)). Further, the shaft member 39 may be a C-type pin (shaft) (see FIGS. 7C and 7D). Thus, when the rotor 32 can be separated, the disc body 40 is fitted into the large-diameter space portion 31a of the retaining female portion 31 of the retaining ring 1 (from the inner peripheral surface 1c side or the outer peripheral surface 1b side). After that, if the shaft member 39 is inserted into the small-diameter hole 31b and fixed by caulking or the like, the setting becomes easy.

  Further, the retaining ring 1 is formed on its inner peripheral surface 1c from the one end 2 to the other end 22 with a locking ridge 33 that locks into the concave groove 4 formed on the outer peripheral surface 12a of the pipe 12. Yes. The inner peripheral portion of the locking ridge 33 has a rectangular shape in the longitudinal section.

  FIG. 10 shows a modification of the retaining ring 1. The retaining ring 1 has three holding female portions 31, and the rotor 32 is held in each holding female portion 31. . Specifically, the three holding female portions 31 are arranged at equal intervals in the circumferential direction between the one end 2 and the other end 22 of the retaining ring 1. The holding female portion 31 and the rotor 32 have the same configuration as that already described with reference to FIGS. In this way, two or more (plural) rotors 32 are provided at equal intervals around the circumference.

  11 and 12 show another embodiment of the pipe joint according to the present invention. This pipe joint C is used for the metal pipe 12 and the composite pipe 50 (resin pipe having the metal layer 50a). used. 1 to 9 is different from the pipe joint C in that the joint body 13 is in contact with the inner cylindrical portion 36 that contacts the inner peripheral surface 12c of the composite pipe 50 (pipe 12) and the outer peripheral surface 12a. A holding groove portion 20 that has an outer fitting cylinder portion 38 and holds the sealing material 17 such as an O-ring, and a circumferential raised portion 35 that gradually rises on the inner circumferential surface 12c of the pipe 12 by plastic deformation. The circumferential concave groove 34 is a point formed on the outer peripheral surface 36 a of the insertion tube portion 36.

FIGS. 13 and 14 show a pipe joint provided with a rotor 32 and a retaining ring 1 having different shapes, and the difference from that shown in FIGS. 1 to 9 is that the rotor 32 has two front and rear rotors. The retaining ring 1 includes a disk portion 32a, and the retaining ring 1 includes a pair of front and rear large-diameter space portions 31a and two rows of front and rear locking protrusions 33.
Specifically, the rotor 32 has disk portions 32a and 32a having large and small diameters 42A and 42B on the front and rear sides, and the outer peripheral portions of the rotor 32 are in contact with the tapered portion 6 of the cap nut 5 at the same time. Configured.

Next, the usage method (action) of the above-described pipe joint will be described.
First, as shown in FIGS. 5 and 6, the retaining ring 1 is disposed in the tapered portion 6 of the hole 25 of the cap nut 5, and the disk portions 32 a of the rotor 32. Make contact.
Then, the pipe 12 is inserted into the insertion hole 27 of the cap nut 5, the inner peripheral surface 1 c of the retaining ring 1 and the hole 16 of the joint body 13, and the tip 12 b of the pipe 12 is inserted into the joint body 13. It is made to contact | abut to the step part 24 for contact | abutting of the hole 16, and it will be in the state of FIG.

1 and 6, the cap nut 5 is screwed into the joint body 13 in the direction of the arrow M ₅ (around the right screw).
At this time, the retaining ring 1 is in contact with the rear end face (tip face) 13a of the joint body 13, and the arrow M _{1 in the} same rotational direction as the arrow M ₅ is moved around a fixed position of the outer peripheral face 12a of the pipe 12. Rotate in the direction of. At the same time, the disk portion 32a of the rotor 32, while rotating in the direction of the arrow M ₃₂ in the same rotational direction as the arrow M _5, while sliding the tapered portion 6 of the cap nut 5 to the reduced diameter (rear side), Revolve around 12 pipes. As indicated by the sizes of the arrows M ₁ and M ₅ , the rotation of the retaining ring 1 is smaller than the rotation of the cap nut 5.
Thus, the stop ring 1, around the position of the pipe 12, while rotating in the direction of the arrow M _1, gradually so gradually reduced in diameter, the rotor 32 ... is, arrows axis L ₃₁ around While rotating in the direction of M _32, an annular groove 4 is formed on the outer peripheral surface 12a of the pipe 12 by plastic deformation.
The screwing operation may be performed manually or using a tool such as a pipe wrench.

Then, as shown in FIGS. 2, 8 and 9, if the cap nut 5 is screwed until the retaining ring 1 contacts the step portion 28 of the cap nut 5, the screwing is completed. At this time, the retaining ring 1 is reduced in diameter, and the locking ridge 33 is fitted into the concave groove 4 of the pipe 12 and locked. Further, the retaining ring 1 is firmly attached to the stepped portion 28 of the cap nut 5 and the rear end surface 13a of the joint body 13.
The concave groove 4 has a semicircular shape corresponding to the disk portion 32a of the rotor 32 in the longitudinal section, so that the locking projection 33 (at the inner peripheral end of the rectangular shape) is securely locked ( (See FIG. 9).
Therefore, the pipe 12 is firmly connected to the pipe joint C without coming out of the pulling force.
Further, according to the retaining ring 1 shown in FIG. 10, since the three rotors 32 abut against the hole 25 of the cap nut 5 and the outer peripheral surface 12a of the pipe 12, as the cap nut 5 is screwed, The concave groove 4 can be reliably formed in the outer peripheral surface 12a of the pipe 12, and the retaining ring 1 is uniformly reduced in diameter, so that the cap nut 5 is screwed very smoothly.

Further, in the pipe joint shown in FIGS. 11 and 12, the insertion tube portion 36 of the joint body 13, the insertion hole 27 of the cap nut 5, the inner peripheral surface 1c of the retaining ring 1, the joint body 13 An insertion hollow portion 44 is formed from the outer fitting cylindrical portion 38, and the pipe 12 (composite pipe 50) is inserted into the insertion hollow portion 44 and brought into contact with the rear abutting portion 44a.
When the cap nut 5 is screwed onto the joint body 13 (similar to the pipe joint C shown in FIGS. 1 to 9), the rotor 32 is formed into an annular recess on the outer peripheral surface 12a of the pipe 12 by plastic deformation. The groove 4 is formed, and the raised portion 35 is fitted into the circumferential concave groove 34 of the insertion tube portion 36 of the joint body 13 while the circumferential raised portion 35 is gradually raised on the inner peripheral surface 12 c of the pipe 12. To go. Then, the retaining ring 1 is screwed until it comes into contact with the stepped portion 28 of the cap nut 5, and the screwing is completed when the state shown in FIGS. 11 and 12 is reached. The pipe 12 is fitted in the concave groove 4 and is locked.

  In the pipe joint shown in FIGS. 13 and 14, when the cap nut 5 is screwed, a deep circumferential groove 4A and a shallow circumferential groove 4B are formed on the outer peripheral surface 12a of the pipe 12, The large-diameter engaging ridge 33 and the small-diameter engaging ridge 33 of the retaining ring 1 are engaged with each other. Therefore, the pipe 12 is firmly connected to the pipe joint C without coming out of the pulling force.

As described above, the pipe joint according to the present invention includes the joint body 13 having the male threaded portion 19 and the cap nut 5 screwed to the male threaded portion 19, and has a single cut 1a on the circumference. A C-shaped retaining ring 1 disposed in the tapered portion 6 of the hole 25 of the nut 5 and a circumferential concave groove on the outer peripheral surface 12a of the pipe 12 to be connected, which is rotatably held by the retaining ring 1 And the retaining ring 1 has a locking ridge 33 that locks in the circumferential groove 4 on the inner peripheral surface 1c thereof. Therefore, when the cap nut 5 is screwed into the joint body 13, the retaining ring 1 is reduced in diameter, and the rotor 32 is plastically deformed and locked in the concave groove 4, so that the pipe 12 is securely attached to the pipe joint. There is no risk of accidental disconnection after construction.
Further, since the concave groove 4 is formed by plastic deformation, chips are not generated from the pipe 12, and the cap nut 5 can be smoothly screwed, so that the work is easy and can be performed at various places. Pipe connections can be made.
Further, when the cap nut 5 is screwed into the joint body 13, the retaining ring 1 is reduced in diameter, and the locking ridge 33 is fitted into the concave groove 4 formed by the rotor 32, so Stop. Therefore, the pipe 12 is securely connected to the pipe joint, the pull-out preventing force becomes extremely large, and there is no possibility that the pipe 12 is unexpectedly pulled out after the construction.

The pipe joint according to the present invention includes a joint main body 13 having a male threaded portion 19 and a cap nut 5 screwed to the male threaded portion 19, and has a single cut 1 a on the circumference of the cap nut 5. The C-shaped retaining ring 1 disposed in the tapered portion 6 of the hole 25 is provided, and the retaining ring 1 includes a holding female portion 31 penetrating from the inner peripheral surface 1c to the outer peripheral surface 1b. And is held in the holding female portion 31 so as to be able to rotate about an axis L ₃₁ parallel to the axis L of the pipe 12 and abuts against the tapered portion 6 of the hole 25 of the cap nut 5 and is connected to the pipe. 12 is provided with a rotor 32 for forming the circumferential groove 4 on the outer circumferential surface 12a by plastic deformation, and the retaining ring 1 is engaged with the circumferential groove 4 on the inner circumferential surface 1c. the convexed latch ridge portion 33, Yusuke Runode, when screwed the cap nut 5 to the joint body 13, the stop ring 1 is reduced in diameter, the rotor 32 is locked by plastically deforming the groove 4 Therefore, the pipe 12 is securely connected to the pipe joint, and there is no possibility that the pipe 12 will come off unexpectedly after construction.
Further, during this screwing, the rotor 32 abuts on the tapered portion 6 of the hole 25 of the cap nut 5 and rolls (rotates), so the rotational torque of the cap nut 5 is very small. Therefore, the retaining ring 1 can be easily fastened to the cap nut 5 without much trouble, so that the connection work by screwing can be performed quickly and smoothly.
Further, since the concave groove 4 is formed by plastic deformation, chips are not generated from the pipe 12, and the cap nut 5 can be smoothly screwed, so that the work is easy and can be performed at various places. Pipe connections can be made.
Further, when the cap nut 5 is screwed into the joint body 13, the retaining ring 1 is reduced in diameter, and the locking ridge 33 is fitted into the concave groove 4 formed by the rotor 32, so Stop. Therefore, the pipe 12 is securely connected to the pipe joint, the pull-out preventing force becomes extremely large, and there is no possibility that the pipe 12 is unexpectedly pulled out after the construction.

In addition, the joint main body 13 having the male screw portion 19 and the cap nut 5 screwed to the male screw portion 19 are provided, and the joint main body 13 has an insertion tube portion 36 that comes into contact with the inner peripheral surface 12 c of the pipe 12. And a C-shaped retaining ring 1 having a single cut 1a on the circumference and disposed in the tapered portion 6 of the hole 25 of the cap nut 5, and held by the retaining ring 1 so as to be rotatable. And a rotor 32 for forming the circumferential groove 4 on the outer peripheral surface 12a of the pipe 12 to be connected by plastic deformation. Further, the retaining ring 1 has a circumferential groove 4 on the inner circumferential surface 1c thereof. the locking ridge portion 33 to be engaged, Yusuke Runode, when screwed the cap nut 5 to the joint body 13, the stop ring 1 is reduced in diameter, the rotor 32 is a concave groove 4 is plastically deformed Therefore, the pipe 12 is securely connected to the pipe joint, and there is no possibility that the pipe 12 will come off unexpectedly after construction. Further, since the concave groove 4 is formed by plastic deformation, chips are not generated from the pipe 12, and the cap nut 5 can be smoothly screwed, so that the work is easy and can be performed at various places. Pipe connections can be made.
Further, composite pipes can be connected, and can be used for connecting various types of pipes 12. Further, when the cap nut 5 is screwed into the joint body 13, the retaining ring 1 is reduced in diameter, and the locking ridge 33 is fitted into the concave groove 4 formed by the rotor 32, so Stop. Therefore, the pipe 12 is securely connected to the pipe joint, the pull-out preventing force becomes extremely large, and there is no possibility that the pipe 12 is unexpectedly pulled out after the construction.

In addition, the joint main body 13 having the male screw portion 19 and the cap nut 5 screwed to the male screw portion 19 are provided, and the joint main body 13 has an insertion tube portion 36 that comes into contact with the inner peripheral surface 12 c of the pipe 12. And a C-shaped retaining ring 1 which has one cut 1a on the circumference and is disposed in the tapered portion 6 of the hole 25 of the cap nut 5. The retaining ring 1 has an inner periphery. the holding female portion 31 formed through the outer peripheral surface 1b from the surface 1c, has, and is capable of rotating held in the holding female portion 31 in the axis L parallel to the axis L ₃₁ around the pipe 12 cap nut the tapered portion 6 of the fifth hole portion 25 of the rotor 32 to form a circumferential groove 4 in the plastic deformation on the outer circumferential surface 12a of the connecting pipe 12 abuts against, with further stop ring 1, on the inner circumferential surface 1c, and locking strip 33 for engaging the circumferential groove 4, Yusuke Runode, when screwed the cap nut 5 to the joint body 13, the stop ring 1 is reduced Since the rotor 32 is plastically deformed and locked in the concave groove 4, the pipe 12 is securely connected to the pipe joint, and there is no possibility that the pipe 12 will come off unexpectedly after construction.
Further, during this screwing, the rotor 32 abuts on the tapered portion 6 of the hole 25 of the cap nut 5 and rolls (rotates), so the rotational torque of the cap nut 5 is very small. Therefore, the retaining ring 1 can be easily fastened to the cap nut 5 without much trouble, so that the connection work by screwing can be performed quickly and smoothly.
Further, since the concave groove 4 is formed by plastic deformation, chips are not generated from the pipe 12, and the cap nut 5 can be smoothly screwed, so that the work is easy and can be performed at various places. Pipe connections can be made.
Further, composite pipes can be connected, and can be used for connecting various types of pipes 12. Further, when the cap nut 5 is screwed into the joint body 13, the retaining ring 1 is reduced in diameter, and the locking ridge 33 is fitted into the concave groove 4 formed by the rotor 32, so Stop. Therefore, the pipe 12 is securely connected to the pipe joint, the pull-out preventing force becomes extremely large, and there is no possibility that the pipe 12 is unexpectedly pulled out after the construction.

It is a section side view showing one embodiment of a pipe joint concerning the present invention. It is a cross-sectional side view. It is an enlarged front view which shows the retaining ring holding a rotor. It is AA expanded sectional drawing of FIG. It is a partial cross section enlarged side view which shows a cap nut and a retaining ring. It is BB sectional drawing of FIG. It is an enlarged view showing a rotor, (a) is an enlarged side view, (b) is an enlarged sectional side view of another rotor, (c) is an enlarged sectional side view of another rotor, (D) is a cross-sectional view of the main part of (c). It is a principal part expanded sectional side view. It is a principal part expanded sectional side view. It is an enlarged front view which shows the modification of a retaining ring. It is a cross-sectional side view which shows other embodiment of the pipe joint which concerns on this invention. It is a principal part sectional side view. It is a principal part expanded sectional side view which shows the pipe joint which has another rotor. It is a principal part expanded sectional side view.

Explanation of symbols

1 retaining ring 1a cut 1b outer peripheral surface 1c inner peripheral surface 4 concave groove 5 cap nut 6 taper part
12 pipes
12a outer peripheral surface
13 Fitting body
19 Male thread
25 holes
31 Holding female part
32 rotation child
33 Kakaritometotsujo part
36 in挿筒part
C pipe joint L, L ₃₁ axis

Claims (4)

In a pipe joint comprising a joint body (13) having a male thread part (19) and a cap nut (5) screwed to the male thread part (19).
A C-shaped retaining ring (1) having a single cut (1a) in the circumference and disposed in the tapered portion (6) of the hole (25) of the cap nut (5); A rotor (32) that is rotatably held by the retaining ring (1) and that forms a circumferential groove (4) by plastic deformation on the outer peripheral surface (12a) of the connected pipe (12) ;
Further, the stop ring (1) has, on its inner circumferential surface (1c), characterized Rukoto the locking ridge portion for engaging with the circumferential groove (4) to (33), Yusuke Pipe fittings. In a pipe joint comprising a joint body (13) having a male thread part (19) and a cap nut (5) screwed to the male thread part (19).
A C-shaped retaining ring (1) having one cut (1a) on the circumference and disposed in the tapered portion (6) of the hole (25) of the cap nut (5);
The retaining ring (1) has a holding female portion (31) penetrating from the inner peripheral surface (1c) to the outer peripheral surface (1b),
Further, the holding female portion (31) is rotatably held around an axis (L ₃₁ ) parallel to the axis (L) of the pipe (12), and the hole (25) of the cap nut (5) is held in the holding female portion (31). A rotor (32) that abuts against the taper portion (6) and forms a circumferential concave groove (4) by plastic deformation on the outer peripheral surface (12a) of the pipe for connection (12) ;
Further, the stop ring (1) has, on its inner circumferential surface (1c), characterized Rukoto the locking ridge portion for engaging with the circumferential groove (4) to (33), Yusuke Pipe fittings. A joint body (13) having a male thread portion (19); and a cap nut (5) screwed to the male thread portion (19); and the joint body (13) includes an inner periphery of the pipe (12). In the pipe joint having the insertion tube portion (36) that comes into contact with the surface (12c),
A C-shaped retaining ring (1) having a single cut (1a) in the circumference and disposed in the tapered portion (6) of the hole (25) of the cap nut (5); A rotor (32) that is rotatably held by the retaining ring (1) and that forms a circumferential groove (4) by plastic deformation on the outer peripheral surface (12a) of the connected pipe (12) ;
Further, the stop ring (1) has, on its inner circumferential surface (1c), characterized Rukoto the locking ridge portion for engaging with the circumferential groove (4) to (33), Yusuke Pipe fittings. A joint body (13) having a male thread portion (19); and a cap nut (5) screwed to the male thread portion (19); and the joint body (13) includes an inner periphery of the pipe (12). In the pipe joint having the insertion tube portion (36) that comes into contact with the surface (12c),
A C-shaped retaining ring (1) having one cut (1a) on the circumference and disposed in the tapered portion (6) of the hole (25) of the cap nut (5);
The retaining ring (1) has a holding female portion (31) penetrating from the inner peripheral surface (1c) to the outer peripheral surface (1b),
Further, the holding female portion (31) is rotatably held around an axis (L ₃₁ ) parallel to the axis (L) of the pipe (12), and the hole (25) of the cap nut (5) is held in the holding female portion (31). A rotor (32) that abuts against the taper portion (6) and forms a circumferential concave groove (4) by plastic deformation on the outer peripheral surface (12a) of the pipe for connection (12) ;
Further, the stop ring (1) has, on its inner circumferential surface (1c), characterized Rukoto the locking ridge portion for engaging with the circumferential groove (4) to (33), Yusuke Pipe fittings.

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