JP6498895B2 - Pipe fitting - Google Patents

Description

  The present invention relates to a pipe joint.

  The following Patent Document 1 discloses a pipe joint. In this pipe joint, a flexible hose (a member to be crimped) is placed between a nipple inserted inside the end of the hose and a sleeve (a crimping member) provided on the outer peripheral side of the hose. It is arranged. Then, the hose is pressed against the outer peripheral surface of the nipple by crimping the sleeve radially inward. As a result, the hose is connected to the nipple and thus to the pipe joint.

JP 2007-278378 A

  However, according to the configuration disclosed in Patent Document 1, the hose is fixed to the nipple by being compressed and deformed between the nipple and the sleeve. For this reason, depending on the material used for the hose, the hose may be deformed or cracked during caulking, and there is room for improvement in this respect.

  In view of the above facts, an object of the present invention is to obtain a pipe joint that can suppress deformation, cracking, and the like due to caulking in a member to be caulked.

The pipe joint according to claim 1 is formed in a tubular shape whose inside is a flow path, and provided with a flange portion and a locked portion by being provided on the outer peripheral surface and having a step in the radial direction. The to-be-clamped member is formed in a tubular shape whose inside is a flow path communicating with the flow path of the to-be-clamped member, coupled to the to-be-clamped member, and of the locked portion A projecting portion that is arranged radially outward and extends from a nut portion formed at a substantially central portion in the axial direction and has a convex shape toward the radially inner side at the tip is formed and deformed along the radial direction. And having a locking portion engaged with the locked portion at a position spaced from the outer peripheral surface of the locked portion in the caulking direction, and the base portion side of the locking portion in the nut portion A metal caulking member whose inner peripheral side is in contact with the flange portion, and the caulking member Wherein together provided at the junction of the crimping member, and a, a water-shutoff member contacting each of the said crimp member and the caulking member.

The invention of claim 2 is the pipe joint according to claim 1, with the locking portion, the locking surface is provided along a radial direction, it said the engaged portion is along the radial direction In addition, a locked surface that can come into contact with the locking surface is provided.

According to the first aspect of the present invention, the caulking member is coupled to the caulking member by engaging the engaging portion of the caulking member with the engaging portion of the caulking member. Since the locking portion is engaged with the locked portion at a position separated from the cross-section bottom of the locked portion in the caulking direction , the load when the locking portion is deformed is applied to the locked portion. Do not communicate. Further, there is no residual load that continues to be applied to the locked portion after the locking portion is deformed. Therefore, it is possible to suppress deformation and cracking of the member to be crimped that is generated when the load is transmitted. Further, the caulking member is engaged with the caulking member by deforming the locking portion disposed on the radially outer side of the locked portion toward the locked portion, that is, radially inward. Is possible. Therefore, since the locking portion is deformed from the radially outer side of the pipe joint, the degree of freedom in the size of the jig for deforming the locking portion is increased. That is, when the locking portion is deformed from the radially inner side of the pipe joint, the jig for deforming the locking portion needs to be sized to fit within the flow path of the pipe joint. However, when the locking portion is deformed from the outside in the radial direction of the pipe joint as in the present invention, the jig size can be easily manufactured because the restriction on the size of the jig is relaxed.

According to the second aspect of the present invention, the locking surface of the locking portion and the locked surface of the locked portion are provided along the radial direction of the crimping member and the crimped member. When the locking surface and the locked surface are in contact, they are contacted along the radial direction. Therefore, even if a force acts in a direction in which the crimping member and the member to be crimped are separated from each other in the axial direction, the locking surface arranged at a right angle to the axial direction and the locked surface contact each other to receive the force. be able to.

The pipe joint according to the first aspect of the present invention has an excellent effect of being able to suppress the deformation, cracking, and the like caused by caulking on the member to be caulked. Moreover, the outstanding effect that cost can be suppressed and manufacturing efficiency can be improved is acquired.

The pipe joint according to the second aspect of the present invention has an excellent effect that the caulking member and the caulking member can be reliably coupled.

It is sectional drawing which shows the pipe joint which concerns on 1st-3rd embodiment. It is an expanded sectional view showing the important section of the pipe joint concerning the 1st-3rd embodiment. (A) is sectional drawing which shows the state before plastic deformation of the latching | locking part in the pipe joint which concerns on 1st-3rd embodiment, (B) is sectional drawing which shows the state after plastic deformation with respect to (A). It is. It is sectional drawing which shows the pipe joint which concerns on 4th Embodiment.

(First embodiment)
Hereinafter, 1st Embodiment of the pipe joint which concerns on this invention is described using FIGS. 1-3.

  As shown in FIG. 1, the pipe joint 10 is a joint for water supply and hot water supply, and includes a crimping member 12, a member to be crimped 14, and an O-ring 16 as a water stop member. doing. The caulking member 12 is formed in a substantially cylindrical shape made of metal, and the inside is a flow path 18. A threaded portion 22 is formed at one end 20 in the axial direction S of the pipe joint 10 along the outer peripheral surface. Further, a nut portion 24 is formed at a substantially central portion of the caulking member 12 adjacent to the screw portion 22. The nut portion 24 has an outer peripheral surface disposed radially outward with respect to the screw portion 22 and has a substantially hexagonal shape as viewed in the axial direction S. Therefore, a spanner or the like can be fitted and rotated.

A locking portion 26 is formed on the side surface 28 of the nut portion 24 opposite to the screw portion 22 side. The locking portion 26 has a root portion 30 disposed on the side surface 28 of the nut portion 24. The inner peripheral end 30 </ b> A of the root portion 30 is configured to be positioned radially outward from the inner peripheral end of the nut portion 24 on the root portion 30 side. In addition, the locking portion 26 extends obliquely from the root portion 30 to the opposite side of the screw portion 22 and radially inward, and a protruding portion 32 that is convex radially inward is formed at the tip. Has been. The projecting portion 32 includes a tip surface 34 provided at the tip of the projecting portion 32 and extending along the substantially radial direction, and a nut portion along the substantially axial direction S from the radially inner end of the tip surface 34. The inner peripheral surface 36 extends to the 24 side, and the locking surface 38 extends radially outward from the end of the inner peripheral surface 36 on the nut portion 24 side (FIG. 2). reference). Moreover, this latching | locking part 26 is made into the state which deform | transformed into the inner side of the radial direction as a caulking direction by plastic deformation centering on the base part 30. As shown in FIG. Further, the flow path 18 in the caulking member 12 is formed with a ring holding portion 42 whose diameter is increased with respect to the flow path 18 at a part of the end 40 opposite to the one end 20 in the axial direction S. ing. Specifically, an O-ring holding surface 42a extending along the radial direction, and extending from the radially outer end of the O-ring holding surface 42a to the locking portion 26 side along the axial direction S. And an O-ring holding surface 42b.

  The member 14 to be crimped is formed in a substantially cylindrical shape made of resin, and the inside is a flow path 44. Further, a part of the member 14 to be crimped is inserted into the crimping member 12 from the side of the locking portion 26 of the crimping member 12. Thereby, the flow path 18 of the crimping member 12 and the flow path 44 of the member to be crimped 14 are in communication with each other. That is, the flow path 18 and the flow path 44 are configured to be continuous.

  A locked portion 27 having a step in the radial direction is formed on the outer peripheral surface 46 of the member to be crimped 14 along the circumferential direction. Specifically, the locked portion 27 is an annular groove, the cross section along the axial direction S is a concave shape, and the opening of the groove is directed radially outward. And the inclined surface 48 extended diagonally toward the caulking member 12 side in the radial direction, and extended from the end portion on the radial inner side of the inclined surface 48 toward the caulking member 12 side along the axial direction S. The bottom surface 50 as a bottom portion of the cross section, and a locked surface 39 extending outward in the radial direction from the end of the bottom surface 50 on the caulking member 12 side (see FIG. 2).

  A locked portion 26 that is displaced radially inward by plastic deformation is housed in the locked portion 27. Thereby, the latching | locking part 26 and the to-be-latched part 27 are engaged. In this engaged state, the inner peripheral surface 36 of the locking portion 26 and the bottom surface 50 of the locked portion 27 are separated, that is, in a state having a gap. That is, the inner diameter of the inner peripheral surface 36 is set larger than the outer diameter of the bottom surface 50. Further, the locking surface 38 of the locking portion 26 and the locked surface 39 of the locked portion 27 are in contact with each other.

  A ring holding portion 52 is formed closer to the caulking member 12 than the locked portion 27 of the caulking member 14. Specifically, an O-ring holding surface 52a extending radially inward from the outer peripheral surface 46, and an O-ring extending along the axial direction S from the radially inner end of the O-ring holding surface 52a. Holding surface 52b. A ring holding space 56 having a substantially rectangular cross-sectional shape along the axial direction S is formed by the ring holding portion 42 of the crimping member 12 and the ring holding portion 52 of the member to be crimped 14. The O-ring 16 is provided inside the ring holding space 56, and the O-ring 16 abuts on the O-ring holding surface 42b, the O-ring holding surface 52a, and the O-ring holding surface 52b, The water stoppage of the fluid flowing through the flow path 18 of the caulking member 12 and the flow path 44 of the caulking member 14 is improved (see FIG. 2).

  An O-ring 17 is provided in parallel on the opposite side of the caulking member 12 in the axial direction S of the caulking member 14, and is formed in a substantially cylindrical shape on the outer peripheral side of the O-ring 17 and the caulking member 14. A cap 58 is provided. A pipe (not shown) is inserted between the inside of the cap 58 and the member 14 to be crimped, and the O-ring 17 provided in parallel and the inner peripheral surface of the pipe are in contact with each other to stop water. Has been.

  In addition, since the caulking member 14 is made of resin as described above, the flow path 44, the locked portion 27, the ring holding portion 52, and the like can be integrally formed by a molding die. Yes.

  Next, plastic deformation of the locking portion 26 will be described.

  As shown in FIG. 3A, the locking portion 26 of the caulking member 12 before plastic deformation extends along the axial direction S, and the caulking member 12 is caulked in this state. The member 14 is inserted. When the locking portion 26 is plastically deformed, the member to be crimped 14 and the crimping member 12 are inserted into the jig 60 formed in a substantially cylindrical shape. The jig 60 is formed such that an end portion 62 on the caulking member 12 side on the inner peripheral surface is inclined outward in the radial direction toward the caulking member 12 side. As shown in FIG. 3B, when the jig 60 is moved along the axial direction S toward the crimping member 12, the end 62 of the jig 60 and the locking portion 26 come into contact with each other, and the end 62 In accordance with the shape, the locking portion 26 is plastically deformed obliquely from the root portion 30 toward the inside in the radial direction. At this time, the protruding portion 32 of the locking portion 26 is displaced into the locked portion 27. The movement of the jig 60 is such that the inner peripheral surface 36 of the locking portion 26 and the bottom surface 50 of the locked portion 27 are separated, and the locking surface 38 of the locking portion 26 and the locked portion 27 are locked. This is performed until the protrusion 32 is displaced to a position where the stop surface 39 can come into contact. As a result, the locking portion 26 of the crimping member 12 and the locked portion 27 of the crimped member 14 are locked.

(Operation and effect of the first embodiment)
Next, the operation and effect of this embodiment will be described.

  In this embodiment, as shown in FIG. 2, the caulking member 12 is caulked by engaging the locking portion 26 of the caulking member 12 with the locked portion 27 of the caulking member 14. Coupled with member 14. The locking portion 26 is engaged with the locked portion 27 at a position separated from the bottom surface 50 of the locked portion 27. That is, since the inner peripheral surface 36 of the locking portion 26 and the bottom surface 50 of the locked portion 27 have a clearance, the load when the locking portion 26 is deformed is subject to the locked portion. No transmission to 27. Further, there is no residual load that continues to be applied to the locked portion 27 after the locking portion 26 is deformed. Therefore, it is possible to suppress deformation and cracking of the member 14 to be crimped that is generated when the load is transmitted. Thereby, it can suppress that the deformation | transformation, crack, etc. by caulking generate | occur | produce in the to-be-caulked member 14.

  Further, the crimping member 12 plastically deforms the latching portion 26 disposed on the radially outer side of the latched portion 27 toward the latched portion 27 side, that is, radially inward, to thereby secure the crimped member 14. Can be engaged with each other. Therefore, since the locking portion 26 is plastically deformed from the outside in the radial direction of the pipe joint 10, the degree of freedom in the size of the jig 60 for plastically deforming the locking portion 26 is increased. In other words, when the locking portion 26 is plastically deformed from the radially inner side of the pipe joint 10, the jig for plastically deforming the locking portion 26 needs to be sized to fit within the flow paths 18 and 44 of the pipe joint 10. However, when the locking portion 26 is plastically deformed from the outside in the radial direction of the pipe joint 10 as in the present invention, the size restriction of the jig 60 is relaxed, so that the jig 60 can be easily manufactured. Thereby, cost can be suppressed and manufacturing efficiency can be improved.

  Furthermore, since the locking surface 38 of the locking portion 26 and the locked surface 39 of the locked portion 27 are provided along the radial direction of the crimping member 12 and the crimped member 14, When the stop surface 38 and the locked surface 39 abut, they abut along the radial direction. Therefore, even if a force acts in a direction in which the crimping member 12 and the member to be crimped 14 are separated in the axial direction S, the locking surface 38 and the locked surface 39 arranged at right angles to the axial direction S are formed. The force can be received by contact. Thereby, the caulking member 12 and the caulking member 14 are prevented from coming off and can be securely coupled.

  Furthermore, in this embodiment, the following effects can be obtained.

  In the present embodiment, the caulking member 12 is coupled to the caulking member 14 by engaging the engaging portion 26 of the caulking member 12 with the engaged portion 27 of the caulking member 14. The caulking member 12 can be coupled to the caulking member 14 if the caulking member 14 has a locked portion 27 having a step in the radial direction. That is, it is only necessary to form a stepped shape that is relatively easy to process on the member 14 to be crimped, and no special processing is required. In other words, if a step is formed, it is possible to use one that has already been mass-produced. Moreover, since the O-ring 16 contact | abutted to the crimping member 12 and the to-be-clamped member 14 is provided in the coupling | bond part of the crimping member 12 and the to-be-clamped member 14, water-stopping is improved. In this state, the crimping member 12 and the member to be crimped 14 are engaged. Thereby, cost can be suppressed and manufacturing efficiency can be improved.

  Moreover, since the to-be-clamped member 14 is comprised with the resin material, a weight can be suppressed compared with the case where the to-be-clamped member 14 is comprised with the metal. Moreover, since the to-be-clamped member 14 can be formed with a shaping | molding die, it becomes possible to suppress cost. Therefore, weight and cost can be suppressed.

(Second Embodiment)
Next, a pipe joint according to a second embodiment of the present invention will be described. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  The pipe joint according to the second embodiment is characterized in that the basic configuration is the same as that of the first embodiment, and the material of the member to be crimped 14 is made of the same metal as the crimping member 12. There is.

  That is, the caulking member 12 is made of a copper alloy as an example, and the caulking member 14 is also made of a copper alloy. That is, another member already mass-produced as a part of the pipe joint can be used as the member 14 to be crimped.

(Operation and effect of the second embodiment)
Next, the operation and effect of this embodiment will be described.

  Also in the present embodiment, as in the first embodiment, the caulking member 12 is subjected to the engagement by the engaging portion 26 of the caulking member 12 being engaged with the engaged portion 27 of the caulking member 14. It is combined with the fastening member 14. The locking portion 26 is engaged with the locked portion 27 at a position separated from the bottom surface 50 of the locked portion 27. That is, since the inner peripheral surface 36 of the locking portion 26 and the bottom surface 50 of the locked portion 27 have a clearance, the load when the locking portion 26 is deformed is subject to the locked portion. No transmission to 27. Further, there is no residual load that continues to be applied to the locked portion 27 after the locking portion 26 is deformed. Therefore, it is possible to suppress deformation and cracking of the member 14 to be crimped that is generated when the load is transmitted. Thereby, it can suppress that the deformation | transformation, a crack, etc. by crimping generate | occur | produce in the to-be-clamped member 14.

  The caulking member 12 is coupled to the caulking member 14 by engaging the engaging portion 26 of the caulking member 12 with the engaged portion 27 of the caulking member 14. The caulking member 12 can be coupled to the caulking member 14 if the caulking member 14 has a locked portion 27 having a step in the radial direction. That is, it is only necessary to form a step that is relatively easy to process on the member 14 to be crimped, and no special processing is required. In other words, if a step is formed, it is possible to use one that has already been mass-produced. Moreover, since the O-ring 16 contact | abutted to the crimping member 12 and the to-be-clamped member 14 is provided in the coupling | bond part of the crimping member 12 and the to-be-clamped member 14, water-stopping is improved. In this state, the crimping member 12 and the member to be crimped 14 are engaged. Thereby, cost can be suppressed and manufacturing efficiency can be improved.

(Third embodiment)
Next, a pipe joint according to a third embodiment of the present invention will be described. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  The pipe joint according to the third embodiment is characterized in that the basic configuration is the same as that of the first embodiment, and the material of the member 14 to be crimped is formed of a material different from that of the crimping member 12. .

  That is, the caulking member 12 is composed of a copper alloy as an example, and the caulking member 14 is composed of stainless steel to suppress rust as an example. This material can be appropriately changed according to required characteristics.

(Operations and effects of the third embodiment)
Next, the operation and effect of this embodiment will be described.

  Also in the present embodiment, as in the first embodiment, the caulking member 12 is subjected to the engagement by the engaging portion 26 of the caulking member 12 being engaged with the engaged portion 27 of the caulking member 14. It is combined with the fastening member 14. The locking portion 26 is engaged with the locked portion 27 at a position separated from the bottom surface 50 of the locked portion 27. That is, since the inner peripheral surface 36 of the locking portion 26 and the bottom surface 50 of the locked portion 27 have a clearance, the load when the locking portion 26 is deformed is subject to the locked portion. No transmission to 27. Further, there is no residual load that continues to be applied to the locked portion 27 after the locking portion 26 is deformed. Therefore, it is possible to suppress deformation and cracking of the member 14 to be crimped that is generated when the load is transmitted. Thereby, it can suppress that the deformation | transformation, a crack, etc. by crimping generate | occur | produce in the to-be-clamped member 14.

  Moreover, generation | occurrence | production of a rust can be suppressed by comprising the to-be-clamped member 14 with stainless steel. And the to-be-clamped member 14 and the caulking member 12 which were comprised with stainless steel can be combined by the latching | locking part 26 and the to-be-latched part 27. FIG. That is, even if the material of the member to be crimped is changed according to the required characteristics, the crimping member 12 and the member to be crimped 14 can be combined while maintaining the water-stopping property. Thereby, it is possible to easily meet the required characteristics.

(Fourth embodiment)
Next, a pipe joint according to a fourth embodiment of the present invention will be described. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  The pipe joint according to the fourth embodiment is characterized in that the basic configuration is the same as that of the first embodiment, and the member 72 to be crimped is substantially cylindrical.

  That is, as shown in FIG. 4, the member to be crimped 72 has a pipe shape. The caulking member 72 is made of a resin material, and a part thereof is inserted into the caulking member 12. In addition, the outer peripheral surface 76 of the member 72 to be tightened has a locked portion 78 in which the cross section along the axial direction S is an annular groove having a concave shape and the opening of the groove is directed radially outward. It is formed along. The locked portion 78 includes an inclined surface 80 extending obliquely radially inward and toward the caulking member 12, and a caulking member along the axial direction S from the radially inner end of the inclined surface 80. The bottom surface 82 extends toward the 12 side, and the locked surface 84 extends radially outward from the end portion of the bottom surface 82 on the crimping member 12 side.

  In the locked part 78, the locking part 26 displaced inward in the radial direction by plastic deformation is housed. Thereby, the latching | locking part 26 and the to-be-latched part 78 are latched. In this locked state, the inner peripheral surface 36 of the locking portion 26 and the bottom surface 82 of the locked portion 78 are separated, that is, in a state having a gap. Further, the locking surface 38 of the locking portion 26 and the locked surface 84 of the locked portion 78 are brought into contact with each other.

(Operations and effects of the fourth embodiment)
Next, the operation and effect of this embodiment will be described.

  Also in the present embodiment, as in the first embodiment, the caulking member 12 is subjected to the engagement by the engaging portion 26 of the caulking member 12 being engaged with the engaged portion 78 of the caulking member 72. The fastening member 72 is coupled. The locking portion 26 is engaged with the locked portion 78 at a position separated from the bottom surface 82 of the locked portion 78. That is, since the inner peripheral surface 36 of the locking part 26 and the bottom surface 82 of the locked part 78 have a clearance, the load when the locking part 26 is deformed is subject to the locked part. No transmission to 78. Further, there is no residual load that continues to be applied to the locked portion 78 after the locking portion 26 is deformed. Therefore, it is possible to suppress deformation and cracking of the member to be crimped 72 that is generated when the load is transmitted. Thereby, it can suppress that the deformation | transformation, a crack, etc. by crimping generate | occur | produce in the to-be-clamped member 72.

  Further, the crimping member 12 plastically deforms the locking portion 26 disposed on the radially outer side of the locked portion 78 to the locked portion 78 side, that is, on the radially inner side, so that the crimped member 72 is fixed. Can be engaged with each other. Therefore, since the locking portion 26 is plastically deformed from the outside in the radial direction of the pipe joint 10, the degree of freedom in the size of the jig 60 for plastically deforming the locking portion 26 is increased. In other words, when the locking portion 26 is plastically deformed from the radially inner side of the pipe joint 10, the jig for plastically deforming the locking portion 26 needs to be sized to fit within the flow paths 18 and 44 of the pipe joint 10. However, when the locking portion 26 is plastically deformed from the outside in the radial direction of the pipe joint 10 as in the present invention, the size restriction of the jig 60 is relaxed, so that the jig 60 can be easily manufactured. Thereby, cost can be suppressed and manufacturing efficiency can be improved.

  Further, since the locking surface 38 of the locking portion 26 and the locked surface 84 of the locked portion 78 are provided along the radial direction of the crimping member 12 and the crimped member 72, When the stop surface 38 and the locked surface 84 abut, they abut along the radial direction. Therefore, even if a force acts in a direction in which the crimping member 12 and the member to be crimped 72 are separated in the axial direction S, the locking surface 38 and the locked surface 84 arranged at right angles to the axial direction S The force can be received by contact. Thereby, the caulking member 12 and the caulking member 72 are prevented from coming off and can be reliably coupled.

  Furthermore, in this embodiment, the following effects can be obtained.

  In the present embodiment, the caulking member 12 is coupled to the caulking member 72 by engaging the engaging portion 26 of the caulking member 12 with the engaged portion 78 of the caulking member 72. The caulking member 12 can be coupled to the caulking member 72 if the caulking member 72 has a locked portion 78 having a step in the radial direction. That is, it is only necessary to form a stepped shape that is relatively easy to process on the member 72 to be crimped, and no special processing is required. In other words, if a step is formed, it is possible to use one that has already been mass-produced. Further, since the O-ring 16 in contact with the caulking member 12 and the caulking member 72 is provided at the coupling portion between the caulking member 12 and the caulking member 72, the water stopping performance is increased. In this state, the crimping member 12 and the member to be crimped 72 are engaged. Thereby, cost can be suppressed and manufacturing efficiency can be improved.

  In the first to fourth embodiments, the locked portions 27 and 78 have the cross-sectional opening directed radially outward and the locking portion 26 is disposed on the outer peripheral side of the locked portions 27 and 78. Although it is set as the structure, not only this but the latching | locking part 26 is good also as a structure arrange | positioned at the inner peripheral side of the to-be-latched parts 27 and 78. In this case, the locked portions 27 and 78 are formed on the inner peripheral surfaces of the members to be fastened 14 and 72, and the cross-sectional opening is directed radially inward.

DESCRIPTION OF SYMBOLS 10 Pipe joint 12 Clamping member 14 Clamped member 16 O-ring (water-stop member)
18 Channel 26 Locking portion 27 Locked portion 38 Locking surface 39 Locked surface 44 Channel 46 Outer peripheral surface (outer periphery)
50 Bottom (cross section bottom)
72 Clamped member 76 Outer peripheral surface (outer periphery)
78 Locked portion 82 Bottom surface (bottom section)
84 Locked surface

Claims (2)

The inside is formed in a tubular shape that is a flow path, and is a member to be fastened having a flange portion and a locked portion by being provided with a step in the radial direction on the outer peripheral surface,
The inside is formed in a tubular shape that is a flow path that communicates with the flow path of the member to be fastened, and is coupled to the member to be fastened and disposed radially outside the locked portion. In addition, a projecting portion that extends from a nut portion formed at a substantially central portion in the axial direction and has a convex shape toward the radially inner side is formed at the tip, and is deformed along the radial direction so as to be deformed along the radial direction. A locking portion engaged with the locked portion at a position spaced from the outer peripheral surface of the locking portion in the caulking direction, and an inner peripheral side of the base portion side of the locking portion in the nut portion is the flange A metal caulking member in contact with the part,
A water stop member that is provided at a coupling portion between the crimping member and the crimping member, and that abuts against the crimping member and the crimping member, respectively.
With pipe fittings. The locking portion is provided with a locking surface along the radial direction,
The locked portion is provided with a locked surface that can be brought into contact with the locking surface along the radial direction.
The pipe joint according to claim 1.

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